On Mon, Dec 24, 2018 at 12:44 AM Pawel Laszczak wrote: > > This patch introduce new Cadence USBSS DRD driver > to linux kernel. > > The Cadence USBSS DRD Driver is a highly > configurable IP Core which can be > instantiated as Dual-Role Device (DRD), > Peripheral Only and Host Only (XHCI) > configurations. > > The current driver has been validated with > FPGA burned. We have support for PCIe > bus, which is used on FPGA prototyping. > > The host side of USBSS-DRD controller is compliance > with XHCI specification, so it works with > standard XHCI linux driver. > > Signed-off-by: Pawel Laszczak > --- > drivers/usb/Kconfig | 2 + > drivers/usb/Makefile | 2 + > drivers/usb/cdns3/Kconfig | 44 + > drivers/usb/cdns3/Makefile | 16 + > drivers/usb/cdns3/cdns3-pci-wrap.c | 157 +++ > drivers/usb/cdns3/core.c | 406 ++++++ > drivers/usb/cdns3/core.h | 116 ++ > drivers/usb/cdns3/debug.h | 166 +++ > drivers/usb/cdns3/debugfs.c | 168 +++ > drivers/usb/cdns3/drd.c | 350 +++++ > drivers/usb/cdns3/drd.h | 162 +++ Hi Pawel, - I reviewed your dual-switch flow, and the handling for dr_mode, it is a little complicated. In fact, dr_mode is static, it is only used to decide which role driver (host/gadget) needs to be created, after that, we use variable cdns->role to track the current role. - I find the strap value is always device mode at my platform, so I delete its handling, meanwhile, I keep id handling and add vbus handling for you use, and add external connector support for my platform. - runtime power manage is not supported at this version, so I delete related code at core.c and drd.c. - debugfs is nice to have feature, I suggest removing it at this initial version. Besides, role switch through /sys is normal feature, the end user may use it at real product, so, it is better at device's /sys entry instead of debugfs. - I don't know why you add "disable" at debugfs, please comment. My changes for drd flow is attached for your reference, It works well at my platform, and I attached my local code base too. Other main changes: diff --git a/drivers/usb/cdns3/trace.h b/drivers/usb/cdns3/trace.h index f3d7a91fae86..8e97575a6b01 100644 --- a/drivers/usb/cdns3/trace.h +++ b/drivers/usb/cdns3/trace.h @@ -179,7 +179,7 @@ DECLARE_EVENT_CLASS(cdns3_log_request, __entry->flags = req->flags; ), TP_printk("%s: req: %p, length: %u/%u %s%s%s, status: %d," - " trb: [start:%d, end:%d: virt addr %pa], flags:%x ", + " trb: [start:%d, end:%d: virt addr 0x%p], flags:%x ", __get_str(name), __entry->req, __entry->actual, __entry->length, __entry->zero ? "zero | " : "", __entry->short_not_ok ? "short | " : "", @@ -236,7 +236,7 @@ DECLARE_EVENT_CLASS(cdns3_log_trb, __entry->control = trb->control; __entry->type = usb_endpoint_type(priv_ep->endpoint.desc); ), - TP_printk("%s: trb 0x%pa, dma buf: 0x%08x, size: %ld, ctrl: 0x%08x (%s%s%s%s%s%s%s)", + TP_printk("%s: trb 0x%p, dma buf: 0x%08x, size: %ld, ctrl: 0x%08x (%s%s%s%s%s%s%s)", __get_str(name), __entry->trb, __entry->buffer, TRB_LEN(__entry->length), __entry->control, __entry->control & TRB_CYCLE ? "C=1, " : "C=0, ", %pa is used for physical address, the former code print zero value. @@ -951,6 +996,9 @@ static irqreturn_t cdns3_device_irq_handler(int irq, void *data) unsigned long flags; u32 reg; + if (cdns->role != CDNS3_ROLE_GADGET) + return ret; + Need to add judgement, otherwise, host interrupt will cause oops. Peter > drivers/usb/cdns3/ep0.c | 896 ++++++++++++ > drivers/usb/cdns3/gadget-export.h | 28 + > drivers/usb/cdns3/gadget.c | 2102 ++++++++++++++++++++++++++++ > drivers/usb/cdns3/gadget.h | 1206 ++++++++++++++++ > drivers/usb/cdns3/host-export.h | 28 + > drivers/usb/cdns3/host.c | 72 + > drivers/usb/cdns3/trace.c | 11 + > drivers/usb/cdns3/trace.h | 389 +++++ > 19 files changed, 6321 insertions(+) > create mode 100644 drivers/usb/cdns3/Kconfig > create mode 100644 drivers/usb/cdns3/Makefile > create mode 100644 drivers/usb/cdns3/cdns3-pci-wrap.c > create mode 100644 drivers/usb/cdns3/core.c > create mode 100644 drivers/usb/cdns3/core.h > create mode 100644 drivers/usb/cdns3/debug.h > create mode 100644 drivers/usb/cdns3/debugfs.c > create mode 100644 drivers/usb/cdns3/drd.c > create mode 100644 drivers/usb/cdns3/drd.h > create mode 100644 drivers/usb/cdns3/ep0.c > create mode 100644 drivers/usb/cdns3/gadget-export.h > create mode 100644 drivers/usb/cdns3/gadget.c > create mode 100644 drivers/usb/cdns3/gadget.h > create mode 100644 drivers/usb/cdns3/host-export.h > create mode 100644 drivers/usb/cdns3/host.c > create mode 100644 drivers/usb/cdns3/trace.c > create mode 100644 drivers/usb/cdns3/trace.h > > diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig > index 987fc5ba6321..5f9334019d04 100644 > --- a/drivers/usb/Kconfig > +++ b/drivers/usb/Kconfig > @@ -112,6 +112,8 @@ source "drivers/usb/usbip/Kconfig" > > endif > > +source "drivers/usb/cdns3/Kconfig" > + > source "drivers/usb/mtu3/Kconfig" > > source "drivers/usb/musb/Kconfig" > diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile > index 7d1b8c82b208..ab125b966cac 100644 > --- a/drivers/usb/Makefile > +++ b/drivers/usb/Makefile > @@ -12,6 +12,8 @@ obj-$(CONFIG_USB_DWC3) += dwc3/ > obj-$(CONFIG_USB_DWC2) += dwc2/ > obj-$(CONFIG_USB_ISP1760) += isp1760/ > > +obj-$(CONFIG_USB_CDNS3) += cdns3/ > + > obj-$(CONFIG_USB_MON) += mon/ > obj-$(CONFIG_USB_MTU3) += mtu3/ > > diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig > new file mode 100644 > index 000000000000..4adfd87811e8 > --- /dev/null > +++ b/drivers/usb/cdns3/Kconfig > @@ -0,0 +1,44 @@ > +config USB_CDNS3 > + tristate "Cadence USB3 Dual-Role Controller" > + depends on USB_SUPPORT && (USB || USB_GADGET) && HAS_DMA > + help > + Say Y here if your system has a cadence USB3 dual-role controller. > + It supports: dual-role switch, Host-only, and Peripheral-only. > + > + If you choose to build this driver is a dynamically linked > + module, the module will be called cdns3.ko. > + > +if USB_CDNS3 > + > +config USB_CDNS3_GADGET > + bool "Cadence USB3 device controller" > + depends on USB_GADGET > + help > + Say Y here to enable device controller functionality of the > + cadence USBSS-DEV driver. > + > + This controller supports FF, HS and SS mode. It doesn't support > + LS and SSP mode > + > +config USB_CDNS3_HOST > + bool "Cadence USB3 host controller" > + depends on USB_XHCI_HCD > + help > + Say Y here to enable host controller functionality of the > + cadence driver. > + > + Host controller is compliance with XHCI so it will use > + standard XHCI driver. > + > +config USB_CDNS3_PCI_WRAP > + tristate "Cadence USB3 support on PCIe-based platforms" > + depends on USB_PCI && ACPI > + default USB_CDNS3 > + help > + If you're using the USBSS Core IP with a PCIe, please say > + 'Y' or 'M' here. > + > + If you choose to build this driver as module it will > + be dynamically linked and module will be called cdns3-pci.ko > + > +endif > diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile > new file mode 100644 > index 000000000000..3f63baa24294 > --- /dev/null > +++ b/drivers/usb/cdns3/Makefile > @@ -0,0 +1,16 @@ > +# SPDX-License-Identifier: GPL-2.0 > +# define_trace.h needs to know how to find our header > +CFLAGS_trace.o := -I$(src) > + > +obj-$(CONFIG_USB_CDNS3) += cdns3.o > +obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci.o > + > +cdns3-y := core.o drd.o trace.o > + > +ifneq ($(CONFIG_DEBUG_FS),) > + cdns3-y += debugfs.o > +endif > + > +cdns3-$(CONFIG_USB_CDNS3_GADGET) += gadget.o ep0.o > +cdns3-$(CONFIG_USB_CDNS3_HOST) += host.o > +cdns3-pci-y := cdns3-pci-wrap.o > diff --git a/drivers/usb/cdns3/cdns3-pci-wrap.c b/drivers/usb/cdns3/cdns3-pci-wrap.c > new file mode 100644 > index 000000000000..e93179c45ece > --- /dev/null > +++ b/drivers/usb/cdns3/cdns3-pci-wrap.c > @@ -0,0 +1,157 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS PCI Glue driver > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > + > +struct cdns3_wrap { > + struct platform_device *plat_dev; > + struct pci_dev *hg_dev; > + struct resource dev_res[4]; > +}; > + > +struct cdns3_wrap wrap; > + > +#define RES_IRQ_ID 0 > +#define RES_HOST_ID 1 > +#define RES_DEV_ID 2 > +#define RES_DRD_ID 3 > + > +#define PCI_BAR_HOST 0 > +#define PCI_BAR_DEV 2 > +#define PCI_BAR_OTG 4 > + > +#define PCI_DEV_FN_HOST_DEVICE 0 > +#define PCI_DEV_FN_OTG 1 > + > +#define PCI_DRIVER_NAME "cdns3-pci-usbss" > +#define PLAT_DRIVER_NAME "cdns-usb3" > + > +#define CDNS_VENDOR_ID 0x17cd > +#define CDNS_DEVICE_ID 0x0100 > + > +/** > + * cdns3_pci_probe - Probe function for Cadence USB wrapper driver > + * @pdev: platform device object > + * @id: pci device id > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_pci_probe(struct pci_dev *pdev, > + const struct pci_device_id *id) > +{ > + struct platform_device_info plat_info; > + struct cdns3_wrap *wrap; > + struct resource *res; > + int err; > + > + /* > + * for GADGET/HOST PCI (devfn) function number is 0, > + * for OTG PCI (devfn) function number is 1 > + */ > + if (!id || pdev->devfn != PCI_DEV_FN_HOST_DEVICE) > + return -EINVAL; > + > + err = pcim_enable_device(pdev); > + if (err) { > + dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", err); > + return err; > + } > + > + pci_set_master(pdev); > + wrap = devm_kzalloc(&pdev->dev, sizeof(*wrap), GFP_KERNEL); > + if (!wrap) { > + dev_err(&pdev->dev, "Failed to allocate memory\n"); > + return -ENOMEM; > + } > + > + /* function 0: host(BAR_0) + device(BAR_1) + otg(BAR_2)). */ > + memset(wrap->dev_res, 0x00, > + sizeof(struct resource) * ARRAY_SIZE(wrap->dev_res)); > + dev_dbg(&pdev->dev, "Initialize Device resources\n"); > + res = wrap->dev_res; > + > + res[RES_DEV_ID].start = pci_resource_start(pdev, PCI_BAR_DEV); > + res[RES_DEV_ID].end = pci_resource_end(pdev, PCI_BAR_DEV); > + res[RES_DEV_ID].name = "cdns3-dev-regs"; > + res[RES_DEV_ID].flags = IORESOURCE_MEM; > + dev_dbg(&pdev->dev, "USBSS-DEV physical base addr: %pa\n", > + &res[RES_DEV_ID].start); > + > + res[RES_HOST_ID].start = pci_resource_start(pdev, PCI_BAR_HOST); > + res[RES_HOST_ID].end = pci_resource_end(pdev, PCI_BAR_HOST); > + res[RES_HOST_ID].name = "cdns3-xhci-regs"; > + res[RES_HOST_ID].flags = IORESOURCE_MEM; > + dev_dbg(&pdev->dev, "USBSS-XHCI physical base addr: %pa\n", > + &res[RES_HOST_ID].start); > + > + res[RES_DRD_ID].start = pci_resource_start(pdev, PCI_BAR_OTG); > + res[RES_DRD_ID].end = pci_resource_end(pdev, PCI_BAR_OTG); > + res[RES_DRD_ID].name = "cdns3-otg"; > + res[RES_DRD_ID].flags = IORESOURCE_MEM; > + dev_dbg(&pdev->dev, "USBSS-DRD physical base addr: %pa\n", > + &res[RES_DRD_ID].start); > + > + /* Interrupt common for both device and XHCI */ > + wrap->dev_res[RES_IRQ_ID].start = pdev->irq; > + wrap->dev_res[RES_IRQ_ID].name = "cdns3-irq"; > + wrap->dev_res[RES_IRQ_ID].flags = IORESOURCE_IRQ; > + > + /* set up platform device info */ > + memset(&plat_info, 0, sizeof(plat_info)); > + plat_info.parent = &pdev->dev; > + plat_info.fwnode = pdev->dev.fwnode; > + plat_info.name = PLAT_DRIVER_NAME; > + plat_info.id = pdev->devfn; > + plat_info.res = wrap->dev_res; > + plat_info.num_res = ARRAY_SIZE(wrap->dev_res); > + plat_info.dma_mask = pdev->dma_mask; > + > + /* register platform device */ > + wrap->plat_dev = platform_device_register_full(&plat_info); > + if (IS_ERR(wrap->plat_dev)) { > + err = PTR_ERR(wrap->plat_dev); > + return err; > + } > + > + pci_set_drvdata(pdev, wrap); > + > + return err; > +} > + > +void cdns3_pci_remove(struct pci_dev *pdev) > +{ > + struct cdns3_wrap *wrap = (struct cdns3_wrap *)pci_get_drvdata(pdev); > + > + platform_device_unregister(wrap->plat_dev); > +} > + > +static const struct pci_device_id cdns3_pci_ids[] = { > + { PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), }, > + { 0, } > +}; > + > +static struct pci_driver cdns3_pci_driver = { > + .name = PCI_DRIVER_NAME, > + .id_table = cdns3_pci_ids, > + .probe = cdns3_pci_probe, > + .remove = cdns3_pci_remove, > +}; > + > +module_pci_driver(cdns3_pci_driver); > +MODULE_DEVICE_TABLE(pci, cdns3_pci_ids); > + > +MODULE_AUTHOR("Pawel Laszczak "); > +MODULE_LICENSE("GPL v2"); > +MODULE_DESCRIPTION("Cadence USBSS PCI wrapperr"); > + > diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c > new file mode 100644 > index 000000000000..d274586aca36 > --- /dev/null > +++ b/drivers/usb/cdns3/core.c > @@ -0,0 +1,406 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Driver. > + * > + * Copyright (C) 2018 Cadence. > + * Copyright (C) 2017-2018 NXP > + * > + * Author: Peter Chen > + * Pawel Laszczak > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include "gadget.h" > +#include "core.h" > +#include "host-export.h" > +#include "gadget-export.h" > +#include "drd.h" > +#include "debug.h" > + > +static inline > +struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns) > +{ > + WARN_ON(cdns->role >= CDNS3_ROLE_END || !cdns->roles[cdns->role]); > + return cdns->roles[cdns->role]; > +} > + > +static inline int cdns3_role_start(struct cdns3 *cdns, enum cdns3_roles role) > +{ > + int ret; > + > + if (WARN_ON(role >= CDNS3_ROLE_END)) > + return 0; > + > + if (!cdns->roles[role]) > + return -ENXIO; > + > + if (cdns->roles[role]->state == CDNS3_ROLE_STATE_ACTIVE) > + return 0; > + > + mutex_lock(&cdns->mutex); > + cdns->role = role; > + ret = cdns->roles[role]->start(cdns); > + if (!ret) > + cdns->roles[role]->state = CDNS3_ROLE_STATE_ACTIVE; > + mutex_unlock(&cdns->mutex); > + return ret; > +} > + > +void cdns3_role_stop(struct cdns3 *cdns) > +{ > + enum cdns3_roles role = cdns->role; > + > + if (role >= CDNS3_ROLE_END) { > + WARN_ON(role > CDNS3_ROLE_END); > + return; > + } > + > + if (cdns->roles[role]->state == CDNS3_ROLE_STATE_INACTIVE) > + return; > + > + mutex_lock(&cdns->mutex); > + cdns->roles[role]->stop(cdns); > + cdns->roles[role]->state = CDNS3_ROLE_STATE_INACTIVE; > + mutex_unlock(&cdns->mutex); > +} > + > +/* > + * cdns->role gets from cdns3_get_initial_role, and this API tells role at the > + * runtime. > + * If both roles are supported, the role is selected based on vbus/id. > + * It could be read from OTG register or external connector. > + * If only single role is supported, only one role structure > + * is allocated, cdns->roles[CDNS3_ROLE_HOST] or cdns->roles[CDNS3_ROLE_GADGET]. > + */ > +static enum cdns3_roles cdns3_get_initial_role(struct cdns3 *cdns) > +{ > + if (cdns->roles[CDNS3_ROLE_HOST] && cdns->roles[CDNS3_ROLE_GADGET]) { > + if (cdns3_is_host(cdns)) > + return CDNS3_ROLE_HOST; > + if (cdns3_is_device(cdns)) > + return CDNS3_ROLE_GADGET; > + } > + return cdns->roles[CDNS3_ROLE_HOST] > + ? CDNS3_ROLE_HOST > + : CDNS3_ROLE_GADGET; > +} > + > +static void cdns3_exit_roles(struct cdns3 *cdns) > +{ > + cdns3_role_stop(cdns); > + cdns3_drd_exit(cdns); > +} > + > +/** > + * cdns3_core_init_role - initialize role of operation > + * @cdns: Pointer to cdns3 structure > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_core_init_role(struct cdns3 *cdns) > +{ > + struct device *dev = cdns->dev; > + enum usb_dr_mode best_dr_mode; > + enum usb_dr_mode dr_mode; > + int ret = 0; > + > + dr_mode = usb_get_dr_mode(dev); > + cdns->role = CDNS3_ROLE_END; > + > + /* > + * If driver can't read mode by means of usb_get_dr_mdoe function then > + * chooses mode according with Kernel configuration. This setting > + * can be restricted later depending on strap pin configuration. > + */ > + if (dr_mode == USB_DR_MODE_UNKNOWN) { > + if (IS_ENABLED(CONFIG_USB_CDNS3_HOST) && > + IS_ENABLED(CONFIG_USB_CDNS3_GADGET)) > + dr_mode = USB_DR_MODE_OTG; > + else if (IS_ENABLED(CONFIG_USB_CDNS3_HOST)) > + dr_mode = USB_DR_MODE_HOST; > + else if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET)) > + dr_mode = USB_DR_MODE_PERIPHERAL; > + } > + > + best_dr_mode = USB_DR_MODE_OTG; > + > + if (dr_mode == USB_DR_MODE_OTG) { > + best_dr_mode = cdns->dr_mode; > + } else if (cdns->dr_mode == USB_DR_MODE_OTG) { > + best_dr_mode = dr_mode; > + } else if (cdns->dr_mode != dr_mode) { > + dev_err(dev, "Incorrect DRD configuration\n"); > + return -EINVAL; > + } > + > + dr_mode = best_dr_mode; > + > + if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { > + ret = cdns3_host_init(cdns); > + if (ret) { > + dev_err(dev, "Host initialization failed with %d\n", > + ret); > + goto err; > + } > + } > + > + if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { > + ret = cdns3_gadget_init(cdns); > + if (ret) { > + dev_err(dev, "Device initialization failed with %d\n", > + ret); > + goto err; > + } > + } > + > + cdns->desired_dr_mode = dr_mode; > + cdns->dr_mode = dr_mode; > + /* > + * dr_mode could be change so DRD must update controller > + * configuration > + */ > + ret = cdns3_drd_update_mode(cdns); > + > + cdns->role = cdns3_get_initial_role(cdns); > + > + ret = cdns3_role_start(cdns, cdns->role); > + if (ret) { > + dev_err(dev, "can't start %s role\n", > + cdns3_get_current_role_driver(cdns)->name); > + goto err; > + } > + > + return ret; > +err: > + cdns3_exit_roles(cdns); > + return ret; > +} > + > +/** > + * cdsn3_get_real_role - get real role of controller based on hardware settings. > + * @cdns: Pointer to cdns3 structure > + * > + * Returns role > + */ > +enum cdns3_roles cdsn3_get_real_role(struct cdns3 *cdns) > +{ > + enum cdns3_roles role = CDNS3_ROLE_END; > + > + if (cdns->current_dr_mode == USB_DR_MODE_OTG) { > + if (cdns3_get_id(cdns)) > + role = CDNS3_ROLE_GADGET; > + else > + role = CDNS3_ROLE_HOST; > + } else { > + if (cdns3_is_host(cdns)) > + role = CDNS3_ROLE_HOST; > + if (cdns3_is_device(cdns)) > + role = CDNS3_ROLE_GADGET; > + } > + > + return role; > +} > + > +/** > + * cdns3_role_switch - work queue handler for role switch > + * > + * @work: work queue item structure > + * > + * Handles below events: > + * - Role switch for dual-role devices > + * - CDNS3_ROLE_GADGET <--> CDNS3_ROLE_END for peripheral-only devices > + */ > +static void cdns3_role_switch(struct work_struct *work) > +{ > + enum cdns3_roles role = CDNS3_ROLE_END; > + struct cdns3_role_driver *role_drv; > + enum cdns3_roles current_role; > + struct cdns3 *cdns; > + int ret = 0; > + > + cdns = container_of(work, struct cdns3, role_switch_wq); > + > + /* During switching cdns->role can be different then role */ > + role = cdsn3_get_real_role(cdns); > + > + role_drv = cdns3_get_current_role_driver(cdns); > + > + pm_runtime_get_sync(cdns->dev); > + > + /* Disable current role. This state can be forced from user space. */ > + if (cdns->debug_disable && role_drv->state == CDNS3_ROLE_STATE_ACTIVE) { > + cdns3_role_stop(cdns); > + goto exit; > + } > + > + /* Do nothing if nothing changed */ > + if (cdns->role == role && role_drv->state == CDNS3_ROLE_STATE_ACTIVE) > + goto exit; > + > + cdns3_role_stop(cdns); > + > + role = cdsn3_get_real_role(cdns); > + > + current_role = cdns->role; > + dev_dbg(cdns->dev, "Switching role"); > + > + ret = cdns3_role_start(cdns, role); > + > + if (ret) { > + /* Back to current role */ > + dev_err(cdns->dev, "set %d has failed, back to %d\n", > + role, current_role); > + cdns3_role_start(cdns, current_role); > + } > +exit: > + pm_runtime_put_sync(cdns->dev); > +} > + > +/** > + * cdns3_probe - probe for cdns3 core device > + * @pdev: Pointer to cdns3 core platform device > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct resource *res; > + struct cdns3 *cdns; > + void __iomem *regs; > + int ret; > + > + cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL); > + if (!cdns) > + return -ENOMEM; > + > + cdns->dev = dev; > + > + platform_set_drvdata(pdev, cdns); > + > + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > + if (!res) { > + dev_err(dev, "missing IRQ\n"); > + return -ENODEV; > + } > + cdns->irq = res->start; > + > + cdns->xhci_res[0] = *res; > + > + /* > + * Request memory region > + * region-0: xHCI > + * region-1: Peripheral > + * region-2: OTG registers > + */ > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + cdns->xhci_res[1] = *res; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); > + regs = devm_ioremap_resource(dev, res); > + if (IS_ERR(regs)) > + return PTR_ERR(regs); > + cdns->dev_regs = regs; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); > + cdns->otg_res = *res; > + > + mutex_init(&cdns->mutex); > + > + cdns->phy = devm_phy_get(dev, "cdns3,usbphy"); > + if (IS_ERR(cdns->phy)) { > + ret = PTR_ERR(cdns->phy); > + if (ret == -ENODEV) { > + cdns->phy = NULL; > + } else if (ret == -EPROBE_DEFER) { > + return ret; > + } else { > + dev_err(dev, "no phy found\n"); > + goto err0; > + } > + } > + > + phy_init(cdns->phy); > + > + INIT_WORK(&cdns->role_switch_wq, cdns3_role_switch); > + > + ret = cdns3_drd_init(cdns); > + if (ret) > + goto err1; > + > + ret = cdns3_core_init_role(cdns); > + if (ret) > + goto err1; > + > + cdns3_debugfs_init(cdns); > + device_set_wakeup_capable(dev, true); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev); > + > + /* > + * The controller needs less time between bus and controller suspend, > + * and we also needs a small delay to avoid frequently entering low > + * power mode. > + */ > + pm_runtime_set_autosuspend_delay(dev, 20); > + pm_runtime_mark_last_busy(dev); > + pm_runtime_use_autosuspend(dev); > + dev_dbg(dev, "Cadence USB3 core: probe succeed\n"); > + > + return 0; > + > +err1: > + phy_exit(cdns->phy); > +err0: > + return ret; > +} > + > +/** > + * cdns3_remove - unbind drd driver and clean up > + * @pdev: Pointer to Linux platform device > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_remove(struct platform_device *pdev) > +{ > + struct cdns3 *cdns = platform_get_drvdata(pdev); > + > + pm_runtime_get_sync(&pdev->dev); > + pm_runtime_disable(&pdev->dev); > + pm_runtime_put_noidle(&pdev->dev); > + cdns3_debugfs_exit(cdns); > + cdns3_exit_roles(cdns); > + phy_exit(cdns->phy); > + return 0; > +} > + > +#ifdef CONFIG_OF > +static const struct of_device_id of_cdns3_match[] = { > + { .compatible = "cdns,usb3-1.0.0" }, > + { .compatible = "cdns,usb3-1.0.1" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, of_cdns3_match); > +#endif > + > +static struct platform_driver cdns3_driver = { > + .probe = cdns3_probe, > + .remove = cdns3_remove, > + .driver = { > + .name = "cdns-usb3", > + .of_match_table = of_match_ptr(of_cdns3_match), > + }, > +}; > + > +module_platform_driver(cdns3_driver); > + > +MODULE_ALIAS("platform:cdns3"); > +MODULE_AUTHOR("Pawel Laszczak "); > +MODULE_LICENSE("GPL v2"); > +MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver"); > diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h > new file mode 100644 > index 000000000000..fb4b39206158 > --- /dev/null > +++ b/drivers/usb/cdns3/core.h > @@ -0,0 +1,116 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Cadence USBSS DRD Header File. > + * > + * Copyright (C) 2017-2018 NXP > + * Copyright (C) 2018 Cadence. > + * > + * Authors: Peter Chen > + * Pawel Laszczak > + */ > +#include > + > +#ifndef __LINUX_CDNS3_CORE_H > +#define __LINUX_CDNS3_CORE_H > + > +struct cdns3; > +enum cdns3_roles { > + CDNS3_ROLE_HOST = 0, > + CDNS3_ROLE_GADGET, > + CDNS3_ROLE_END, > +}; > + > +/** > + * struct cdns3_role_driver - host/gadget role driver > + * @start: start this role > + * @stop: stop this role > + * @suspend: suspend callback for this role > + * @resume: resume callback for this role > + * @irq: irq handler for this role > + * @name: role name string (host/gadget) > + * @state: current state > + */ > +struct cdns3_role_driver { > + int (*start)(struct cdns3 *cdns); > + void (*stop)(struct cdns3 *cdns); > + int (*suspend)(struct cdns3 *cdns, bool do_wakeup); > + int (*resume)(struct cdns3 *cdns, bool hibernated); > + const char *name; > +#define CDNS3_ROLE_STATE_INACTIVE 0 > +#define CDNS3_ROLE_STATE_ACTIVE 1 > + int state; > +}; > + > +#define CDNS3_XHCI_RESOURCES_NUM 2 > +/** > + * struct cdns3 - Representation of Cadence USB3 DRD controller. > + * @dev: pointer to Cadence device struct > + * @xhci_regs: pointer to base of xhci registers > + * @xhci_res: the resource for xhci > + * @dev_regs: pointer to base of dev registers > + * @otg_regs: pointer to base of otg registers > + * @irq: irq number for controller > + * @roles: array of supported roles for this controller > + * @role: current role > + * @host_dev: the child host device pointer for cdns3 core > + * @gadget_dev: the child gadget device pointer for cdns3 core > + * @usb: phy for this controller > + * @role_switch_wq: work queue item for role switch > + * @in_lpm: the controller in low power mode > + * @wakeup_int: the wakeup interrupt > + * @mutex: the mutex for concurrent code at driver > + * @dr_mode: supported mode of operation it can be only Host, only Device > + * or OTG mode that allow to switch between Device and Host mode. > + * This field based on firmware setting, kernel configuration > + * and hardware configuration. > + * @current_dr_mode: current mode of operation when in dual-role mode > + * @desired_dr_mode: desired mode of operation when in dual-role mode. > + * This value can be changed during runtime. > + * Available options depends on dr_mode: > + * dr_mode | desired_dr_mode and current_dr_mode > + * ---------------------------------------------------------------- > + * USB_DR_MODE_HOST | only USB_DR_MODE_HOST > + * USB_DR_MODE_PERIPHERAL | only USB_DR_MODE_PERIPHERAL > + * USB_DR_MODE_OTG | only USB_DR_MODE_HOST > + * USB_DR_MODE_OTG | only USB_DR_MODE_PERIPHERAL > + * USB_DR_MODE_OTG | USB_DR_MODE_OTG > + * > + * Desired_dr_role can be changed by means of debugfs. > + * @root: debugfs root folder pointer > + * @debug_disable: > + */ > +struct cdns3 { > + struct device *dev; > + void __iomem *xhci_regs; > + struct resource xhci_res[CDNS3_XHCI_RESOURCES_NUM]; > + struct cdns3_usb_regs __iomem *dev_regs; > + > + struct resource otg_res; > + struct cdns3_otg_legacy_regs *otg_v0_regs; > + struct cdns3_otg_regs *otg_v1_regs; > + struct cdns3_otg_common_regs *otg_regs; > +#define CDNS3_CONTROLLER_V0 0 > +#define CDNS3_CONTROLLER_V1 1 > + u32 version; > + > + int irq; > + struct cdns3_role_driver *roles[CDNS3_ROLE_END]; > + enum cdns3_roles role; > + struct platform_device *host_dev; > + struct cdns3_device *gadget_dev; > + struct phy *phy; > + struct work_struct role_switch_wq; > + int in_lpm:1; > + int wakeup_int:1; > + /* mutext used in workqueue*/ > + struct mutex mutex; > + enum usb_dr_mode dr_mode; > + enum usb_dr_mode current_dr_mode; > + enum usb_dr_mode desired_dr_mode; > + struct dentry *root; > + int debug_disable:1; > +}; > + > +void cdns3_role_stop(struct cdns3 *cdns); > + > +#endif /* __LINUX_CDNS3_CORE_H */ > diff --git a/drivers/usb/cdns3/debug.h b/drivers/usb/cdns3/debug.h > new file mode 100644 > index 000000000000..94f9ef15f899 > --- /dev/null > +++ b/drivers/usb/cdns3/debug.h > @@ -0,0 +1,166 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Cadence USBSS DRD Driver. > + * Debug header file. > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > +#ifndef __LINUX_CDNS3_DEBUG > +#define __LINUX_CDNS3_DEBUG > + > +#include "core.h" > + > +static inline char *cdns3_decode_usb_irq(char *str, > + enum usb_device_speed speed, > + u32 usb_ists) > +{ > + int ret; > + > + ret = sprintf(str, "IRQ %08x = ", usb_ists); > + > + if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) { > + ret += sprintf(str + ret, "Connection %s\n", > + usb_speed_string(speed)); > + } > + if (usb_ists & USB_ISTS_CON2I || usb_ists & USB_ISTS_CONI) > + ret += sprintf(str + ret, "Disconnection "); > + if (usb_ists & USB_ISTS_L2ENTI) > + ret += sprintf(str + ret, "suspended "); > + > + if (usb_ists & USB_ISTS_L2EXTI) > + ret += sprintf(str + ret, "L2 exit "); > + if (usb_ists & USB_ISTS_U3EXTI) > + ret += sprintf(str + ret, "U3 exit "); > + if (usb_ists & USB_ISTS_UWRESI) > + ret += sprintf(str + ret, "Warm Reset "); > + if (usb_ists & USB_ISTS_UHRESI) > + ret += sprintf(str + ret, "Hot Reset "); > + if (usb_ists & USB_ISTS_U2RESI) > + ret += sprintf(str + ret, "Reset"); > + > + return str; > +} > + > +static inline char *cdns3_decode_ep_irq(char *str, > + u32 ep_sts, > + const char *ep_name) > +{ > + int ret; > + > + ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts); > + > + if (ep_sts & EP_STS_SETUP) > + ret += sprintf(str + ret, "SETUP "); > + if (ep_sts & EP_STS_IOC) > + ret += sprintf(str + ret, "IOC "); > + if (ep_sts & EP_STS_ISP) > + ret += sprintf(str + ret, "ISP "); > + if (ep_sts & EP_STS_DESCMIS) > + ret += sprintf(str + ret, "DESCMIS "); > + if (ep_sts & EP_STS_STREAMR) > + ret += sprintf(str + ret, "STREAMR "); > + if (ep_sts & EP_STS_MD_EXIT) > + ret += sprintf(str + ret, "MD_EXIT "); > + if (ep_sts & EP_STS_TRBERR) > + ret += sprintf(str + ret, "TRBERR "); > + if (ep_sts & EP_STS_NRDY) > + ret += sprintf(str + ret, "NRDY "); > + if (ep_sts & EP_STS_PRIME) > + ret += sprintf(str + ret, "PRIME "); > + if (ep_sts & EP_STS_SIDERR) > + ret += sprintf(str + ret, "SIDERRT "); > + if (ep_sts & EP_STS_OUTSMM) > + ret += sprintf(str + ret, "OUTSMM "); > + if (ep_sts & EP_STS_ISOERR) > + ret += sprintf(str + ret, "ISOERR "); > + if (ep_sts & EP_STS_IOT) > + ret += sprintf(str + ret, "IOT "); > + > + return str; > +} > + > +static inline char *cdns3_decode_epx_irq(char *str, > + char *ep_name, > + u32 ep_sts) > +{ > + return cdns3_decode_ep_irq(str, ep_sts, ep_name); > +} > + > +static inline char *cdns3_decode_ep0_irq(char *str, > + int dir, > + u32 ep_sts) > +{ > + return cdns3_decode_ep_irq(str, ep_sts, > + dir ? "ep0IN" : "ep0OUT"); > +} > + > +/** > + * Debug a transfer ring. > + * > + * Prints out all TRBs in the endpoint ring, even those after the Link TRB. > + *. > + */ > +static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep, > + struct cdns3_trb *ring, char *str) > +{ > + dma_addr_t addr = priv_ep->trb_pool_dma; > + struct cdns3_trb *trb; > + int trb_per_sector; > + int ret = 0; > + int i; > + > + trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type); > + > + trb = &priv_ep->trb_pool[priv_ep->dequeue]; > + ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name); > + > + ret += sprintf(str + ret, > + "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n", > + priv_ep->dequeue, trb, > + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); > + > + trb = &priv_ep->trb_pool[priv_ep->enqueue]; > + ret += sprintf(str + ret, > + "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n", > + priv_ep->enqueue, trb, > + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); > + > + ret += sprintf(str + ret, > + "\t\tfree trbs: %d, CCS=%d, PCS=%d\n", > + priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs); > + > + if (trb_per_sector > TRBS_PER_SEGMENT) > + trb_per_sector = TRBS_PER_SEGMENT; > + > + if (trb_per_sector > TRBS_PER_SEGMENT) { > + sprintf(str + ret, "\t\tTo big transfer ring %d\n", > + trb_per_sector); > + return str; > + } > + > + for (i = 0; i < trb_per_sector; ++i) { > + trb = &ring[i]; > + ret += sprintf(str + ret, > + "\t\t@%pad %08x %08x %08x\n", &addr, > + le32_to_cpu(trb->buffer), > + le32_to_cpu(trb->length), > + le32_to_cpu(trb->control)); > + addr += sizeof(*trb); > + } > + > + return str; > +} > + > +#ifdef CONFIG_DEBUG_FS > +void cdns3_debugfs_init(struct cdns3 *cdns); > +void cdns3_debugfs_exit(struct cdns3 *cdns); > +#else > +void cdns3_debugfs_init(struct cdns3 *cdns); > +{ } > +void cdns3_debugfs_exit(struct cdns3 *cdns); > +{ } > +#endif > + > +#endif /*__LINUX_CDNS3_DEBUG*/ > diff --git a/drivers/usb/cdns3/debugfs.c b/drivers/usb/cdns3/debugfs.c > new file mode 100644 > index 000000000000..d7919f5c1d90 > --- /dev/null > +++ b/drivers/usb/cdns3/debugfs.c > @@ -0,0 +1,168 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Controller DebugFS filer. > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > + > +#include > +#include > +#include > +#include > + > +#include "core.h" > +#include "gadget.h" > +#include "drd.h" > + > +static int cdns3_mode_show(struct seq_file *s, void *unused) > +{ > + struct cdns3 *cdns = s->private; > + > + switch (cdns->current_dr_mode) { > + case USB_DR_MODE_HOST: > + seq_puts(s, "host\n"); > + break; > + case USB_DR_MODE_PERIPHERAL: > + seq_puts(s, "device\n"); > + break; > + case USB_DR_MODE_OTG: > + seq_puts(s, "otg\n"); > + break; > + default: > + seq_puts(s, "UNKNOWN mode\n"); > + } > + > + return 0; > +} > + > +static int cdns3_mode_open(struct inode *inode, struct file *file) > +{ > + return single_open(file, cdns3_mode_show, inode->i_private); > +} > + > +static ssize_t cdns3_mode_write(struct file *file, > + const char __user *ubuf, > + size_t count, loff_t *ppos) > +{ > + struct seq_file *s = file->private_data; > + struct cdns3 *cdns = s->private; > + u32 mode = USB_DR_MODE_UNKNOWN; > + char buf[32]; > + > + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) > + return -EFAULT; > + > + if (!strncmp(buf, "host", 4)) { > + if (cdns->dr_mode == USB_DR_MODE_HOST || > + cdns->dr_mode == USB_DR_MODE_OTG) { > + mode = USB_DR_MODE_HOST; > + } > + } > + > + if (!strncmp(buf, "device", 6)) > + if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL || > + cdns->dr_mode == USB_DR_MODE_OTG) > + mode = USB_DR_MODE_PERIPHERAL; > + > + if (!strncmp(buf, "otg", 3) && cdns->dr_mode == USB_DR_MODE_OTG) > + mode = USB_DR_MODE_OTG; > + > + if (mode == USB_DR_MODE_UNKNOWN) { > + dev_err(cdns->dev, "Failed: incorrect mode setting\n"); > + return -EFAULT; > + } > + > + if (cdns->current_dr_mode != mode) { > + cdns->desired_dr_mode = mode; > + cdns->debug_disable = 0; > + cdns3_role_stop(cdns); > + cdns3_drd_update_mode(cdns); > + queue_work(system_freezable_wq, &cdns->role_switch_wq); > + } > + > + return count; > +} > + > +static const struct file_operations cdns3_mode_fops = { > + .open = cdns3_mode_open, > + .write = cdns3_mode_write, > + .read = seq_read, > + .llseek = seq_lseek, > + .release = single_release, > +}; > + > +static int cdns3_disable_show(struct seq_file *s, void *unused) > +{ > + struct cdns3 *cdns = s->private; > + > + if (!cdns->debug_disable) > + seq_puts(s, "0\n"); > + else > + seq_puts(s, "1\n"); > + > + return 0; > +} > + > +static ssize_t cdns3_disable_write(struct file *file, > + const char __user *ubuf, > + size_t count, loff_t *ppos) > +{ > + struct seq_file *s = file->private_data; > + struct cdns3 *cdns = s->private; > + int disable; > + char buf[32]; > + > + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) > + return -EFAULT; > + > + if (!strncmp(buf, "1", 1) || !strncmp(buf, "yes", 3)) { > + disable = 1; > + } else if (!strncmp(buf, "0", 1) || !strncmp(buf, "no", 2)) { > + disable = 0; > + } else { > + dev_err(cdns->dev, "Failed: incorrect disable setting\n"); > + return -EFAULT; > + } > + > + if (disable != cdns->debug_disable) { > + cdns->debug_disable = disable; > + queue_work(system_freezable_wq, &cdns->role_switch_wq); > + } > + > + return count; > +} > + > +static int cdns3_disable_open(struct inode *inode, struct file *file) > +{ > + return single_open(file, cdns3_disable_show, inode->i_private); > +} > + > +static const struct file_operations cdns3_disable_fops = { > + .open = cdns3_disable_open, > + .write = cdns3_disable_write, > + .read = seq_read, > + .llseek = seq_lseek, > + .release = single_release, > +}; > + > +void cdns3_debugfs_init(struct cdns3 *cdns) > +{ > + struct dentry *root; > + > + root = debugfs_create_dir(dev_name(cdns->dev), NULL); > + cdns->root = root; > + if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET) && > + IS_ENABLED(CONFIG_USB_CDNS3_HOST)) > + debugfs_create_file("mode", 0644, root, cdns, > + &cdns3_mode_fops); > + > + debugfs_create_file("disable", 0644, root, cdns, > + &cdns3_disable_fops); > +} > + > +void cdns3_debugfs_exit(struct cdns3 *cdns) > +{ > + debugfs_remove_recursive(cdns->root); > +} > diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c > new file mode 100644 > index 000000000000..b0c32302eb0b > --- /dev/null > +++ b/drivers/usb/cdns3/drd.c > @@ -0,0 +1,350 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Driver. > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak + * > + */ > +#include > +#include > +#include > +#include > + > +#include "gadget.h" > +#include "drd.h" > +#include "core.h" > + > +static int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on); > +static int cdns3_drd_switch_host(struct cdns3 *cdns, int on); > + > +/** > + * cdns3_set_mode - change mode of OTG Core > + * @cdns: pointer to context structure > + * @mode: selected mode from cdns_role > + */ > +void cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode) > +{ > + u32 reg; > + > + cdns->current_dr_mode = mode; > + > + switch (mode) { > + case USB_DR_MODE_PERIPHERAL: > + dev_info(cdns->dev, "Set controller to Gadget mode\n"); > + cdns3_drd_switch_gadget(cdns, 1); > + break; > + case USB_DR_MODE_HOST: > + dev_info(cdns->dev, "Set controller to Host mode\n"); > + cdns3_drd_switch_host(cdns, 1); > + break; > + case USB_DR_MODE_OTG: > + dev_info(cdns->dev, "Set controller to OTG mode\n"); > + if (cdns->version == CDNS3_CONTROLLER_V1) { > + reg = readl(&cdns->otg_v1_regs->override); > + reg |= OVERRIDE_IDPULLUP; > + writel(reg, &cdns->otg_v1_regs->override); > + } else { > + reg = readl(&cdns->otg_v0_regs->ctrl1); > + reg |= OVERRIDE_IDPULLUP_V0; > + writel(reg, &cdns->otg_v0_regs->ctrl1); > + } > + > + /* > + * Hardware specification says: "ID_VALUE must be valid within > + * 50ms after idpullup is set to '1" so driver must wait > + * 50ms before reading this pin. > + */ > + usleep_range(50000, 60000); > + break; > + default: > + cdns->current_dr_mode = USB_DR_MODE_UNKNOWN; > + dev_err(cdns->dev, "Unsupported mode of operation %d\n", mode); > + return; > + } > +} > + > +int cdns3_get_id(struct cdns3 *cdns) > +{ > + int id; > + > + id = readl(&cdns->otg_regs->sts) & OTGSTS_ID_VALUE; > + dev_dbg(cdns->dev, "OTG ID: %d", id); > + return 1 ; //id; > +} > + > +int cdns3_is_host(struct cdns3 *cdns) > +{ > + if (cdns->current_dr_mode == USB_DR_MODE_HOST) > + return 1; > + else if (!cdns3_get_id(cdns)) > + return 1; > + > + return 0; > +} > + > +int cdns3_is_device(struct cdns3 *cdns) > +{ > + if (cdns->current_dr_mode == USB_DR_MODE_PERIPHERAL) > + return 1; > + else if (cdns->current_dr_mode == USB_DR_MODE_OTG) > + if (cdns3_get_id(cdns)) > + return 1; > + > + return 0; > +} > + > +/** > + * cdns3_otg_disable_irq - Disable all OTG interrupts > + * @cdns: Pointer to controller context structure > + */ > +static void cdns3_otg_disable_irq(struct cdns3 *cdns) > +{ > + writel(0, &cdns->otg_regs->ien); > +} > + > +/** > + * cdns3_otg_enable_irq - enable id and sess_valid interrupts > + * @cdns: Pointer to controller context structure > + */ > +static void cdns3_otg_enable_irq(struct cdns3 *cdns) > +{ > + writel(OTGIEN_ID_CHANGE_INT | OTGIEN_VBUSVALID_RISE_INT | > + OTGIEN_VBUSVALID_FALL_INT, &cdns->otg_regs->ien); > +} > + > +/** > + * cdns3_drd_switch_host - start/stop host > + * @cdns: Pointer to controller context structure > + * @on: 1 for start, 0 for stop > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_drd_switch_host(struct cdns3 *cdns, int on) > +{ > + int ret; > + u32 reg = OTGCMD_OTG_DIS; > + > + /* switch OTG core */ > + if (on) { > + writel(OTGCMD_HOST_BUS_REQ | reg, &cdns->otg_regs->cmd); > + > + dev_dbg(cdns->dev, "Waiting for Host mode is turned on\n"); > + ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_XHCI_READY, > + OTGSTS_XHCI_READY, 100000); > + > + if (ret) > + return ret; > + } else { > + usleep_range(30, 40); > + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP | > + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF, > + &cdns->otg_regs->cmd); > + } > + > + return 0; > +} > + > +/** > + * cdns3_drd_switch_gadget - start/stop gadget > + * @cdns: Pointer to controller context structure > + * @on: 1 for start, 0 for stop > + * > + * Returns 0 on success otherwise negative errno > + */ > +static int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on) > +{ > + int ret; > + u32 reg = OTGCMD_OTG_DIS; > + > + /* switch OTG core */ > + if (on) { > + writel(OTGCMD_DEV_BUS_REQ | reg, &cdns->otg_regs->cmd); > + > + dev_dbg(cdns->dev, "Waiting for Device mode is turned on\n"); > + > + ret = cdns3_handshake(&cdns->otg_regs->sts, OTGSTS_DEV_READY, > + OTGSTS_DEV_READY, 100000); > + > + if (ret) > + return ret; > + } else { > + /* > + * driver should wait at least 10us after disabling Device > + * before turning-off Device (DEV_BUS_DROP) > + */ > + usleep_range(20, 30); > + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP | > + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF, > + &cdns->otg_regs->cmd); > + } > + > + return 0; > +} > + > +/** > + * cdns3_init_otg_mode - initialize drd controller > + * @cdns: Pointer to controller context structure > + * > + * Returns 0 on success otherwise negative errno > + */ > +static void cdns3_init_otg_mode(struct cdns3 *cdns) > +{ > + cdns3_otg_disable_irq(cdns); > + /* clear all interrupts */ > + writel(~0, &cdns->otg_regs->ivect); > + > + cdns3_set_mode(cdns, USB_DR_MODE_OTG); > + > + if (cdns3_is_host(cdns)) > + cdns3_drd_switch_host(cdns, 1); > + else > + cdns3_drd_switch_gadget(cdns, 1); > + > + cdns3_otg_enable_irq(cdns); > +} > + > +/** > + * cdns3_drd_update_mode - initialize mode of operation > + * @cdns: Pointer to controller context structure > + * > + * Returns 0 on success otherwise negative errno > + */ > +int cdns3_drd_update_mode(struct cdns3 *cdns) > +{ > + int ret = 0; > + > + if (cdns->desired_dr_mode == cdns->current_dr_mode) > + return ret; > + > + cdns3_drd_switch_gadget(cdns, 0); > + cdns3_drd_switch_host(cdns, 0); > + > + switch (cdns->desired_dr_mode) { > + case USB_DR_MODE_PERIPHERAL: > + cdns3_set_mode(cdns, USB_DR_MODE_PERIPHERAL); > + break; > + case USB_DR_MODE_HOST: > + cdns3_set_mode(cdns, USB_DR_MODE_HOST); > + break; > + case USB_DR_MODE_OTG: > + cdns3_init_otg_mode(cdns); > + break; > + default: > + dev_err(cdns->dev, "Unsupported mode of operation %d\n", > + cdns->dr_mode); > + return -EINVAL; > + } > + > + return ret; > +} > + > +/** > + * cdns3_drd_irq - interrupt handler for OTG events > + * > + * @irq: irq number for cdns3 core device > + * @data: structure of cdns3 > + * > + * Returns IRQ_HANDLED or IRQ_NONE > + */ > +static irqreturn_t cdns3_drd_irq(int irq, void *data) > +{ > + irqreturn_t ret = IRQ_NONE; > + struct cdns3 *cdns = data; > + u32 reg; > + > + if (cdns->dr_mode != USB_DR_MODE_OTG) > + return ret; > + > + reg = readl(&cdns->otg_regs->ivect); > + > + if (!reg) > + return ret; > + > + if (reg & OTGIEN_ID_CHANGE_INT) { > + dev_dbg(cdns->dev, "OTG IRQ: new ID: %d\n", > + cdns3_get_id(cdns)); > + > + queue_work(system_freezable_wq, &cdns->role_switch_wq); > + > + ret = IRQ_HANDLED; > + } > + > + writel(~0, &cdns->otg_regs->ivect); > + return ret; > +} > + > +int cdns3_drd_init(struct cdns3 *cdns) > +{ > + void __iomem *regs; > + int ret = 0; > + u32 state; > + > + regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res); > + if (IS_ERR(regs)) > + return PTR_ERR(regs); > + > + /* Detection of DRD version. Controller has been released > + * in two versions. Both are similar, but they have same changes > + * in register maps. > + * The first register in old version is command register and it's read > + * only, so driver should read 0 from it. On the other hand, in v1 > + * the first register contains device ID number which is not set to 0. > + * Driver uses this fact to detect the proper version of > + * controller. > + */ > + cdns->otg_v0_regs = regs; > + if (!readl(&cdns->otg_v0_regs->cmd)) { > + cdns->version = CDNS3_CONTROLLER_V0; > + cdns->otg_v1_regs = NULL; > + cdns->otg_regs = regs; > + dev_info(cdns->dev, "DRD version v0 (%08x)\n", > + readl(&cdns->otg_v0_regs->version)); > + } else { > + cdns->otg_v0_regs = NULL; > + cdns->otg_v1_regs = regs; > + cdns->otg_regs = (void *)&cdns->otg_v1_regs->cmd; > + cdns->version = CDNS3_CONTROLLER_V1; > + dev_info(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n", > + readl(&cdns->otg_v1_regs->did), > + readl(&cdns->otg_v1_regs->rid)); > + } > + > + state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts)); > + > + /* Update dr_mode according to STRAP configuration. */ > + cdns->dr_mode = USB_DR_MODE_OTG; > + if (state == OTGSTS_STRAP_HOST) { > + dev_info(cdns->dev, "Controller strapped to HOST\n"); > + cdns->dr_mode = USB_DR_MODE_HOST; > + } else if (state == OTGSTS_STRAP_GADGET) { > + dev_info(cdns->dev, "Controller strapped to PERIPHERAL\n"); > + cdns->dr_mode = USB_DR_MODE_PERIPHERAL; > + } > + > + cdns->desired_dr_mode = cdns->dr_mode; > + cdns->current_dr_mode = USB_DR_MODE_UNKNOWN; > + > + ret = devm_request_threaded_irq(cdns->dev, cdns->irq, cdns3_drd_irq, > + NULL, IRQF_SHARED, > + dev_name(cdns->dev), cdns); > + > + if (ret) > + return ret; > + > + state = readl(&cdns->otg_regs->sts); > + if (OTGSTS_OTG_NRDY(state) != 0) { > + dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n"); > + return -ENODEV; > + } > + > + ret = cdns3_drd_update_mode(cdns); > + > + return ret; > +} > + > +int cdns3_drd_exit(struct cdns3 *cdns) > +{ > + return cdns3_drd_switch_host(cdns, 0); > +} > diff --git a/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h > new file mode 100644 > index 000000000000..6a29cdcb492d > --- /dev/null > +++ b/drivers/usb/cdns3/drd.h > @@ -0,0 +1,162 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Cadence USB3 DRD header file. > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > +#ifndef __LINUX_CDNS3_DRD > +#define __LINUX_CDNS3_DRD > + > +#include > +#include > +#include "core.h" > + > +/* DRD register interface for version v1. */ > +struct cdns3_otg_regs { > + __le32 did; > + __le32 rid; > + __le32 capabilities; > + __le32 reserved1; > + __le32 cmd; > + __le32 sts; > + __le32 state; > + __le32 reserved2; > + __le32 ien; > + __le32 ivect; > + __le32 refclk; > + __le32 tmr; > + __le32 reserved3[4]; > + __le32 simulate; > + __le32 override; > + __le32 susp_ctrl; > + __le32 reserved4; > + __le32 anasts; > + __le32 adp_ramp_time; > + __le32 ctrl1; > + __le32 ctrl2; > +}; > + > +/* DRD register interface for version v0. */ > +struct cdns3_otg_legacy_regs { > + __le32 cmd; > + __le32 sts; > + __le32 state; > + __le32 refclk; > + __le32 ien; > + __le32 ivect; > + __le32 reserved1[3]; > + __le32 tmr; > + __le32 reserved2[2]; > + __le32 version; > + __le32 capabilities; > + __le32 reserved3[2]; > + __le32 simulate; > + __le32 reserved4[5]; > + __le32 ctrl1; > +}; > + > +/* > + * Common registers interface for both version of DRD. > + */ > +struct cdns3_otg_common_regs { > + __le32 cmd; > + __le32 sts; > + __le32 state; > + __le32 different1; > + __le32 ien; > + __le32 ivect; > +}; > + > +/* CDNS_RID - bitmasks */ > +#define CDNS_RID(p) ((p) & GENMASK(15, 0)) > + > +/* CDNS_VID - bitmasks */ > +#define CDNS_DID(p) ((p) & GENMASK(31, 0)) > + > +/* OTGCMD - bitmasks */ > +/* "Request the bus for Device mode. */ > +#define OTGCMD_DEV_BUS_REQ BIT(0) > +/* Request the bus for Host mode */ > +#define OTGCMD_HOST_BUS_REQ BIT(1) > +/* Enable OTG mode. */ > +#define OTGCMD_OTG_EN BIT(2) > +/* Disable OTG mode */ > +#define OTGCMD_OTG_DIS BIT(3) > +/*"Configure OTG as A-Device. */ > +#define OTGCMD_A_DEV_EN BIT(4) > +/*"Configure OTG as A-Device. */ > +#define OTGCMD_A_DEV_DIS BIT(5) > +/* Drop the bus for Device mod e. */ > +#define OTGCMD_DEV_BUS_DROP BIT(8) > +/* Drop the bus for Host mode*/ > +#define OTGCMD_HOST_BUS_DROP BIT(9) > +/* Power Down USBSS-DEV. */ > +#define OTGCMD_DEV_POWER_OFF BIT(11) > +/* Power Down CDNSXHCI. */ > +#define OTGCMD_HOST_POWER_OFF BIT(12) > + > +/* OTGIEN - bitmasks */ > +/* ID change interrupt enable */ > +#define OTGIEN_ID_CHANGE_INT BIT(0) > +/* Vbusvalid fall detected interrupt enable.*/ > +#define OTGIEN_VBUSVALID_RISE_INT BIT(4) > +/* Vbusvalid fall detected interrupt enable */ > +#define OTGIEN_VBUSVALID_FALL_INT BIT(5) > + > +/* OTGSTS - bitmasks */ > +/* > + * Current value of the ID pin. It is only valid when idpullup in > + * OTGCTRL1_TYPE register is set to '1'. > + */ > +#define OTGSTS_ID_VALUE BIT(0) > +/* Current value of the vbus_valid */ > +#define OTGSTS_VBUS_VALID BIT(1) > +/* Current value of the b_sess_vld */ > +#define OTGSTS_SESSION_VALID BIT(2) > +/*Device mode is active*/ > +#define OTGSTS_DEV_ACTIVE BIT(3) > +/* Host mode is active. */ > +#define OTGSTS_HOST_ACTIVE BIT(4) > +/* OTG Controller not ready. */ > +#define OTGSTS_OTG_NRDY_MASK BIT(11) > +#define OTGSTS_OTG_NRDY(p) ((p) & OTGSTS_OTG_NRDY_MASK) > +/* > + * Value of the strap pins. > + * 000 - no default configuration > + * 010 - Controller initiall configured as Host > + * 100 - Controller initially configured as Device > + */ > +#define OTGSTS_STRAP(p) (((p) & GENMASK(14, 12)) >> 12) > +#define OTGSTS_STRAP_NO_DEFAULT_CFG 0x00 > +#define OTGSTS_STRAP_HOST_OTG 0x01 > +#define OTGSTS_STRAP_HOST 0x02 > +#define OTGSTS_STRAP_GADGET 0x04 > +/* Host mode is turned on. */ > +#define OTGSTS_XHCI_READY BIT(26) > +/* "Device mode is turned on .*/ > +#define OTGSTS_DEV_READY BIT(27) > + > +/* OTGSTATE- bitmasks */ > +#define OTGSTATE_HOST_STATE_MASK GENMASK(5, 3) > +#define OTGSTATE_HOST_STATE_IDLE 0x0 > +#define OTGSTATE_HOST_STATE_VBUS_FALL 0x7 > +#define OTGSTATE_HOST_STATE(p) (((p) & OTGSTATE_HOST_STATE_MASK) >> 3) > + > +/* OTGREFCLK - bitmasks */ > +#define OTGREFCLK_STB_CLK_SWITCH_EN BIT(31) > + > +/* OVERRIDE - bitmasks */ > +#define OVERRIDE_IDPULLUP BIT(0) > +/* Only for CDNS3_CONTROLLER_V0 version */ > +#define OVERRIDE_IDPULLUP_V0 BIT(24) > + > +int cdns3_is_host(struct cdns3 *cdns); > +int cdns3_is_device(struct cdns3 *cdns); > +int cdns3_get_id(struct cdns3 *cdns); > +int cdns3_drd_init(struct cdns3 *cdns); > +int cdns3_drd_exit(struct cdns3 *cdns); > +int cdns3_drd_update_mode(struct cdns3 *cdns); > + > +#endif /* __LINUX_CDNS3_DRD */ > diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c > new file mode 100644 > index 000000000000..89cf1cde1555 > --- /dev/null > +++ b/drivers/usb/cdns3/ep0.c > @@ -0,0 +1,896 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Driver - gadget side. > + * > + * Copyright (C) 2018 Cadence Design Systems. > + * Copyright (C) 2017-2018 NXP > + * > + * Authors: Pawel Jez , > + * Pawel Laszczak > + * Peter Chen > + */ > + > +#include > + > +#include "gadget.h" > +#include "trace.h" > + > +static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = { > + .bLength = USB_DT_ENDPOINT_SIZE, > + .bDescriptorType = USB_DT_ENDPOINT, > + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, > +}; > + > +/** > + * cdns3_ep0_run_transfer - Do transfer on default endpoint hardware > + * @priv_dev: extended gadget object > + * @dma_addr: physical address where data is/will be stored > + * @length: data length > + * @erdy: set it to 1 when ERDY packet should be sent - > + * exit from flow control state > + */ > +static void cdns3_ep0_run_transfer(struct cdns3_device *priv_dev, > + dma_addr_t dma_addr, > + unsigned int length, int erdy) > +{ > + struct cdns3_usb_regs __iomem *regs = priv_dev->regs; > + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; > + > + priv_ep->trb_pool->buffer = TRB_BUFFER(dma_addr); > + priv_ep->trb_pool->length = TRB_LEN(length); > + priv_ep->trb_pool->control = TRB_CYCLE | TRB_IOC | TRB_TYPE(TRB_NORMAL); > + > + trace_cdns3_prepare_trb(priv_ep, priv_ep->trb_pool); > + > + cdns3_select_ep(priv_dev, priv_dev->ep0_data_dir); > + > + writel(EP_STS_TRBERR, ®s->ep_sts); > + writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), ®s->ep_traddr); > + trace_cdns3_doorbell_ep0(priv_dev->ep0_data_dir ? "ep0in" : "ep0out", > + readl(®s->ep_traddr)); > + > + /* TRB should be prepared before starting transfer */ > + writel(EP_CMD_DRDY, ®s->ep_cmd); > + > + if (erdy) > + writel(EP_CMD_ERDY, &priv_dev->regs->ep_cmd); > +} > + > +/** > + * cdns3_ep0_delegate_req - Returns status of handling setup packet > + * Setup is handled by gadget driver > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns zero on success or negative value on failure > + */ > +static int cdns3_ep0_delegate_req(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + int ret; > + > + spin_unlock(&priv_dev->lock); > + priv_dev->setup_pending = 1; > + ret = priv_dev->gadget_driver->setup(&priv_dev->gadget, ctrl_req); > + priv_dev->setup_pending = 0; > + spin_lock(&priv_dev->lock); > + return ret; > +} > + > +static void cdns3_prepare_setup_packet(struct cdns3_device *priv_dev) > +{ > + priv_dev->ep0_data_dir = 0; > + priv_dev->ep0_stage = CDNS3_SETUP_STAGE; > + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, > + sizeof(struct usb_ctrlrequest), 0); > +} > + > +static void cdns3_ep0_complete_setup(struct cdns3_device *priv_dev, > + u8 send_stall, u8 send_erdy) > +{ > + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; > + struct usb_request *request; > + > + request = cdns3_next_request(&priv_ep->pending_req_list); > + if (request) > + list_del_init(&request->list); > + > + if (send_stall) { > + dev_dbg(priv_dev->dev, "STALL for ep0\n"); > + /* set_stall on ep0 */ > + cdns3_select_ep(priv_dev, 0x00); > + writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd); > + } else { > + cdns3_prepare_setup_packet(priv_dev); > + } > + > + priv_dev->ep0_stage = CDNS3_SETUP_STAGE; > + writel((send_erdy ? EP_CMD_ERDY : 0) | EP_CMD_REQ_CMPL, > + &priv_dev->regs->ep_cmd); > +} > + > +/** > + * cdns3_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, USB_GADGET_DELAYED_STATUS on deferred status stage, > + * error code on error > + */ > +static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + enum usb_device_state device_state = priv_dev->gadget.state; > + struct cdns3_endpoint *priv_ep; > + u32 config = le16_to_cpu(ctrl_req->wValue); > + int result = 0; > + int i; > + > + switch (device_state) { > + case USB_STATE_ADDRESS: > + /* Configure non-control EPs */ > + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) { > + priv_ep = priv_dev->eps[i]; > + if (!priv_ep) > + continue; > + > + if (priv_ep->flags & EP_CLAIMED) > + cdns3_ep_config(priv_ep); > + } > + > + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req); > + > + if (result) > + return result; > + > + if (config) { > + cdns3_set_hw_configuration(priv_dev); > + } else { > + cdns3_hw_reset_eps_config(priv_dev); > + usb_gadget_set_state(&priv_dev->gadget, > + USB_STATE_ADDRESS); > + } > + break; > + case USB_STATE_CONFIGURED: > + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req); > + > + if (!config && !result) { > + cdns3_hw_reset_eps_config(priv_dev); > + usb_gadget_set_state(&priv_dev->gadget, > + USB_STATE_ADDRESS); > + } > + break; > + default: > + result = -EINVAL; > + } > + > + return result; > +} > + > +/** > + * cdns3_req_ep0_set_address - Handling of SET_ADDRESS standard USB request > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + enum usb_device_state device_state = priv_dev->gadget.state; > + u32 reg; > + u32 addr; > + > + addr = le16_to_cpu(ctrl_req->wValue); > + > + if (addr > USB_DEVICE_MAX_ADDRESS) { > + dev_err(priv_dev->dev, > + "Device address (%d) cannot be greater than %d\n", > + addr, USB_DEVICE_MAX_ADDRESS); > + return -EINVAL; > + } > + > + if (device_state == USB_STATE_CONFIGURED) { > + dev_err(priv_dev->dev, > + "can't set_address from configured state\n"); > + return -EINVAL; > + } > + > + reg = readl(&priv_dev->regs->usb_cmd); > + > + writel(reg | USB_CMD_FADDR(addr) | USB_CMD_SET_ADDR, > + &priv_dev->regs->usb_cmd); > + > + usb_gadget_set_state(&priv_dev->gadget, > + (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT)); > + > + return 0; > +} > + > +/** > + * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_req_ep0_get_status(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl) > +{ > + __le16 *response_pkt; > + u16 usb_status = 0; > + u32 recip; > + u32 reg; > + > + recip = ctrl->bRequestType & USB_RECIP_MASK; > + > + switch (recip) { > + case USB_RECIP_DEVICE: > + /* self powered */ > + if (priv_dev->is_selfpowered) > + usb_status = BIT(USB_DEVICE_SELF_POWERED); > + > + if (priv_dev->wake_up_flag) > + usb_status |= BIT(USB_DEVICE_REMOTE_WAKEUP); > + > + if (priv_dev->gadget.speed != USB_SPEED_SUPER) > + break; > + > + reg = readl(&priv_dev->regs->usb_sts); > + > + if (priv_dev->u1_allowed) > + usb_status |= BIT(USB_DEV_STAT_U1_ENABLED); > + > + if (priv_dev->u2_allowed) > + usb_status |= BIT(USB_DEV_STAT_U2_ENABLED); > + > + break; > + case USB_RECIP_INTERFACE: > + return cdns3_ep0_delegate_req(priv_dev, ctrl); > + case USB_RECIP_ENDPOINT: > + /* check if endpoint is stalled */ > + cdns3_select_ep(priv_dev, ctrl->wIndex); > + if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts))) > + usb_status = BIT(USB_ENDPOINT_HALT); > + break; > + default: > + return -EINVAL; > + } > + > + response_pkt = (__le16 *)priv_dev->setup_buf; > + *response_pkt = cpu_to_le16(usb_status); > + > + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, > + sizeof(*response_pkt), 1); > + return 0; > +} > + > +static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl, > + int set) > +{ > + enum usb_device_state state; > + enum usb_device_speed speed; > + int ret = 0; > + u32 wValue; > + u32 wIndex; > + u16 tmode; > + > + wValue = le16_to_cpu(ctrl->wValue); > + wIndex = le16_to_cpu(ctrl->wIndex); > + state = priv_dev->gadget.state; > + speed = priv_dev->gadget.speed; > + > + switch (ctrl->wValue) { > + case USB_DEVICE_REMOTE_WAKEUP: > + priv_dev->wake_up_flag = !!set; > + break; > + case USB_DEVICE_U1_ENABLE: > + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER) > + return -EINVAL; > + > + priv_dev->u1_allowed = !!set; > + break; > + case USB_DEVICE_U2_ENABLE: > + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER) > + return -EINVAL; > + > + priv_dev->u2_allowed = !!set; > + break; > + case USB_DEVICE_LTM_ENABLE: > + ret = -EINVAL; > + break; > + case USB_DEVICE_TEST_MODE: > + if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH) > + return -EINVAL; > + > + tmode = le16_to_cpu(ctrl->wIndex); > + > + if (!set || (tmode & 0xff) != 0) > + return -EINVAL; > + > + switch (tmode >> 8) { > + case TEST_J: > + case TEST_K: > + case TEST_SE0_NAK: > + case TEST_PACKET: > + cdns3_ep0_complete_setup(priv_dev, 0, 1); > + /** > + * Little delay to give the controller some time > + * for sending status stage. > + * This time should be less then 3ms. > + */ > + usleep_range(1000, 2000); > + cdns3_set_register_bit(&priv_dev->regs->usb_cmd, > + USB_CMD_STMODE | > + USB_STS_TMODE_SEL(tmode - 1)); > + break; > + default: > + ret = -EINVAL; > + } > + break; > + default: > + ret = -EINVAL; > + } > + > + return ret; > +} > + > +static int cdns3_ep0_feature_handle_intf(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl, > + int set) > +{ > + u32 wValue; > + int ret = 0; > + > + wValue = le16_to_cpu(ctrl->wValue); > + > + switch (wValue) { > + case USB_INTRF_FUNC_SUSPEND: > + break; > + default: > + ret = -EINVAL; > + } > + > + return ret; > +} > + > +static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl, > + int set) > +{ > + struct cdns3_endpoint *priv_ep; > + int ret = 0; > + u8 index; > + > + if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT) > + return -EINVAL; > + > + if (!(ctrl->wIndex & ~USB_DIR_IN)) > + return 0; > + > + index = cdns3_ep_addr_to_index(ctrl->wIndex); > + priv_ep = priv_dev->eps[index]; > + > + cdns3_select_ep(priv_dev, ctrl->wIndex); > + > + if (set) { > + writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd); > + priv_ep->flags |= EP_STALL; > + } else { > + struct usb_request *request; > + > + if (priv_dev->eps[index]->flags & EP_WEDGE) { > + cdns3_select_ep(priv_dev, 0x00); > + return 0; > + } > + > + writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd); > + > + /* wait for EPRST cleared */ > + ret = cdns3_handshake(&priv_dev->regs->ep_cmd, > + EP_CMD_EPRST, 0, 100); > + if (ret) > + return -EINVAL; > + > + priv_ep->flags &= ~EP_STALL; > + > + request = cdns3_next_request(&priv_ep->pending_req_list); > + if (request) > + cdns3_ep_run_transfer(priv_ep, request); > + } > + return ret; > +} > + > +/** > + * cdns3_req_ep0_handle_feature - > + * Handling of GET/SET_FEATURE standard USB request > + * > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * @set: must be set to 1 for SET_FEATURE request > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_req_ep0_handle_feature(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl, > + int set) > +{ > + int ret = 0; > + u32 recip; > + > + recip = ctrl->bRequestType & USB_RECIP_MASK; > + > + switch (recip) { > + case USB_RECIP_DEVICE: > + ret = cdns3_ep0_feature_handle_device(priv_dev, ctrl, set); > + break; > + case USB_RECIP_INTERFACE: > + ret = cdns3_ep0_feature_handle_intf(priv_dev, ctrl, set); > + break; > + case USB_RECIP_ENDPOINT: > + ret = cdns3_ep0_feature_handle_endpoint(priv_dev, ctrl, set); > + break; > + default: > + return -EINVAL; > + } > + > + return ret; > +} > + > +/** > + * cdns3_req_ep0_set_sel - Handling of SET_SEL standard USB request > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_req_ep0_set_sel(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + if (priv_dev->gadget.state < USB_STATE_ADDRESS) > + return -EINVAL; > + > + if (ctrl_req->wLength != 6) { > + dev_err(priv_dev->dev, "Set SEL should be 6 bytes, got %d\n", > + ctrl_req->wLength); > + return -EINVAL; > + } > + > + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, 6, 1); > + return 0; > +} > + > +/** > + * cdns3_req_ep0_set_isoch_delay - > + * Handling of GET_ISOCH_DELAY standard USB request > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_req_ep0_set_isoch_delay(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + if (ctrl_req->wIndex || ctrl_req->wLength) > + return -EINVAL; > + > + priv_dev->isoch_delay = ctrl_req->wValue; > + > + return 0; > +} > + > +/** > + * cdns3_ep0_standard_request - Handling standard USB requests > + * @priv_dev: extended gadget object > + * @ctrl_req: pointer to received setup packet > + * > + * Returns 0 if success, error code on error > + */ > +static int cdns3_ep0_standard_request(struct cdns3_device *priv_dev, > + struct usb_ctrlrequest *ctrl_req) > +{ > + int ret; > + > + switch (ctrl_req->bRequest) { > + case USB_REQ_SET_ADDRESS: > + ret = cdns3_req_ep0_set_address(priv_dev, ctrl_req); > + break; > + case USB_REQ_SET_CONFIGURATION: > + ret = cdns3_req_ep0_set_configuration(priv_dev, ctrl_req); > + break; > + case USB_REQ_GET_STATUS: > + ret = cdns3_req_ep0_get_status(priv_dev, ctrl_req); > + break; > + case USB_REQ_CLEAR_FEATURE: > + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 0); > + break; > + case USB_REQ_SET_FEATURE: > + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 1); > + break; > + case USB_REQ_SET_SEL: > + ret = cdns3_req_ep0_set_sel(priv_dev, ctrl_req); > + break; > + case USB_REQ_SET_ISOCH_DELAY: > + ret = cdns3_req_ep0_set_isoch_delay(priv_dev, ctrl_req); > + break; > + default: > + ret = cdns3_ep0_delegate_req(priv_dev, ctrl_req); > + break; > + } > + > + return ret; > +} > + > +static void __pending_setup_status_handler(struct cdns3_device *priv_dev) > +{ > + struct usb_request *request = priv_dev->pending_status_request; > + > + if (priv_dev->status_completion_no_call && request && > + request->complete) { > + request->complete(&priv_dev->eps[0]->endpoint, request); > + priv_dev->status_completion_no_call = 0; > + } > +} > + > +void cdns3_pending_setup_status_handler(struct work_struct *work) > +{ > + struct cdns3_device *priv_dev = container_of(work, struct cdns3_device, > + pending_status_wq); > + unsigned long flags; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + __pending_setup_status_handler(priv_dev); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > +} > + > +/** > + * cdns3_gadget_ep_giveback - call struct usb_request's ->complete callback > + * @priv_ep: The endpoint to whom the request belongs to > + * @priv_req: The request we're giving back > + * @status: completion code for the request > + * > + * Must be called with controller's lock held and interrupts disabled. This > + * function will unmap @req and call its ->complete() callback to notify upper > + * layers that it has completed. > + */ > + > +void cdns3_gadget_ep0_giveback(struct cdns3_device *priv_dev, > + int status) > +{ > + struct cdns3_endpoint *priv_ep; > + struct usb_request *request; > + > + priv_ep = priv_dev->eps[0]; > + request = cdns3_next_request(&priv_ep->pending_req_list); > + > + priv_ep->dir = priv_dev->ep0_data_dir; > + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), status); > +} > + > +/** > + * cdns3_ep0_setup_phase - Handling setup USB requests > + * @priv_dev: extended gadget object > + */ > +static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev) > +{ > + struct usb_ctrlrequest *ctrl = priv_dev->setup_buf; > + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; > + int result; > + > + priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN; > + > + trace_cdns3_ctrl_req(ctrl); > + > + if (!list_empty(&priv_ep->pending_req_list)) { > + struct usb_request *request; > + > + request = cdns3_next_request(&priv_ep->pending_req_list); > + priv_ep->dir = priv_dev->ep0_data_dir; > + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), > + -ECONNRESET); > + } > + > + if (le16_to_cpu(ctrl->wLength)) > + priv_dev->ep0_stage = CDNS3_DATA_STAGE; > + else > + priv_dev->ep0_stage = CDNS3_STATUS_STAGE; > + > + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) > + result = cdns3_ep0_standard_request(priv_dev, ctrl); > + else > + result = cdns3_ep0_delegate_req(priv_dev, ctrl); > + > + if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE && > + result != USB_GADGET_DELAYED_STATUS) { > + cdns3_ep0_complete_setup(priv_dev, 0, 1); > + } else if (result < 0) { > + cdns3_ep0_complete_setup(priv_dev, 1, 1); > + } > +} > + > +static void cdns3_transfer_completed(struct cdns3_device *priv_dev) > +{ > + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; > + > + if (!list_empty(&priv_ep->pending_req_list)) { > + struct usb_request *request; > + > + trace_cdns3_complete_trb(priv_ep, priv_ep->trb_pool); > + request = cdns3_next_request(&priv_ep->pending_req_list); > + > + request->actual = > + TRB_LEN(le32_to_cpu(priv_ep->trb_pool->length)); > + > + priv_ep->dir = priv_dev->ep0_data_dir; > + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), 0); > + } > + > + cdns3_ep0_complete_setup(priv_dev, 0, 0); > +} > + > +/** > + * cdns3_check_new_setup - Check if controller receive new SETUP packet. > + * @priv_dev: extended gadget object > + * > + * The SETUP packet can be kept in on-chip memory or in system memory. > + */ > +static bool cdns3_check_new_setup(struct cdns3_device *priv_dev) > +{ > + u32 ep_sts_reg; > + > + cdns3_select_ep(priv_dev, 0 | USB_DIR_OUT); > + ep_sts_reg = readl(&priv_dev->regs->ep_sts); > + > + return !!(ep_sts_reg & (EP_STS_SETUP | EP_STS_STPWAIT)); > +} > + > +/** > + * cdns3_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0 > + * @priv_dev: extended gadget object > + * @dir: USB_DIR_IN for IN direction, USB_DIR_OUT for OUT direction > + */ > +void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir) > +{ > + u32 ep_sts_reg; > + > + cdns3_select_ep(priv_dev, dir); > + > + ep_sts_reg = readl(&priv_dev->regs->ep_sts); > + writel(ep_sts_reg, &priv_dev->regs->ep_sts); > + > + trace_cdns3_ep0_irq(priv_dev, ep_sts_reg); > + > + __pending_setup_status_handler(priv_dev); > + > + if ((ep_sts_reg & EP_STS_SETUP)) { > + cdns3_ep0_setup_phase(priv_dev); > + } else if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) { > + priv_dev->ep0_data_dir = dir; > + cdns3_transfer_completed(priv_dev); > + } > + > + if (ep_sts_reg & EP_STS_DESCMIS) { > + if (dir == 0 && !priv_dev->setup_pending) > + cdns3_prepare_setup_packet(priv_dev); > + } > +} > + > +/** > + * cdns3_gadget_ep0_enable > + * Function shouldn't be called by gadget driver, > + * endpoint 0 is allways active > + */ > +static int cdns3_gadget_ep0_enable(struct usb_ep *ep, > + const struct usb_endpoint_descriptor *desc) > +{ > + return -EINVAL; > +} > + > +/** > + * cdns3_gadget_ep0_disable > + * Function shouldn't be called by gadget driver, > + * endpoint 0 is allways active > + */ > +static int cdns3_gadget_ep0_disable(struct usb_ep *ep) > +{ > + return -EINVAL; > +} > + > +/** > + * cdns3_gadget_ep0_set_halt > + * @ep: pointer to endpoint zero object > + * @value: 1 for set stall, 0 for clear stall > + * > + * Returns 0 > + */ > +static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value) > +{ > + /* TODO */ > + return 0; > +} > + > +/** > + * cdns3_gadget_ep0_queue Transfer data on endpoint zero > + * @ep: pointer to endpoint zero object > + * @request: pointer to request object > + * @gfp_flags: gfp flags > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int cdns3_gadget_ep0_queue(struct usb_ep *ep, > + struct usb_request *request, > + gfp_t gfp_flags) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + unsigned long flags; > + int erdy_sent = 0; > + int ret = 0; > + > + dev_dbg(priv_dev->dev, "Queue to Ep0%s L: %d\n", > + priv_dev->ep0_data_dir ? "IN" : "OUT", > + request->length); > + > + /* cancel the request if controller receive new SETUP packet. */ > + if (cdns3_check_new_setup(priv_dev)) > + return -ECONNRESET; > + > + /* send STATUS stage. Should be called only for SET_CONFIGURATION */ > + if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) { > + spin_lock_irqsave(&priv_dev->lock, flags); > + cdns3_select_ep(priv_dev, 0x00); > + > + erdy_sent = !priv_dev->hw_configured_flag; > + cdns3_set_hw_configuration(priv_dev); > + > + if (!erdy_sent) > + cdns3_ep0_complete_setup(priv_dev, 0, 1); > + > + request->actual = 0; > + priv_dev->status_completion_no_call = true; > + priv_dev->pending_status_request = request; > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + > + /* > + * Since there is no completion interrupt for status stage, > + * it needs to call ->completion in software after > + * ep0_queue is back. > + */ > + queue_work(system_freezable_wq, &priv_dev->pending_status_wq); > + return 0; > + } > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + if (!list_empty(&priv_ep->pending_req_list)) { > + dev_err(priv_dev->dev, > + "can't handle multiple requests for ep0\n"); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return -EBUSY; > + } > + > + ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request, > + priv_dev->ep0_data_dir); > + if (ret) { > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + dev_err(priv_dev->dev, "failed to map request\n"); > + return -EINVAL; > + } > + > + request->status = -EINPROGRESS; > + list_add_tail(&request->list, &priv_ep->pending_req_list); > + cdns3_ep0_run_transfer(priv_dev, request->dma, request->length, 1); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + > + return ret; > +} > + > +/** > + * cdns3_gadget_ep_set_wedge Set wedge on selected endpoint > + * @ep: endpoint object > + * > + * Returns 0 > + */ > +int cdns3_gadget_ep_set_wedge(struct usb_ep *ep) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + > + dev_dbg(priv_dev->dev, "Wedge for %s\n", ep->name); > + cdns3_gadget_ep_set_halt(ep, 1); > + priv_ep->flags |= EP_WEDGE; > + > + return 0; > +} > + > +const struct usb_ep_ops cdns3_gadget_ep0_ops = { > + .enable = cdns3_gadget_ep0_enable, > + .disable = cdns3_gadget_ep0_disable, > + .alloc_request = cdns3_gadget_ep_alloc_request, > + .free_request = cdns3_gadget_ep_free_request, > + .queue = cdns3_gadget_ep0_queue, > + .dequeue = cdns3_gadget_ep_dequeue, > + .set_halt = cdns3_gadget_ep0_set_halt, > + .set_wedge = cdns3_gadget_ep_set_wedge, > +}; > + > +/** > + * cdns3_ep0_config - Configures default endpoint > + * @priv_dev: extended gadget object > + * > + * Functions sets parameters: maximal packet size and enables interrupts > + */ > +void cdns3_ep0_config(struct cdns3_device *priv_dev) > +{ > + struct cdns3_usb_regs __iomem *regs; > + struct cdns3_endpoint *priv_ep; > + u32 max_packet_size = 64; > + > + regs = priv_dev->regs; > + > + if (priv_dev->gadget.speed == USB_SPEED_SUPER) > + max_packet_size = 512; > + > + priv_ep = priv_dev->eps[0]; > + > + if (!list_empty(&priv_ep->pending_req_list)) { > + struct usb_request *request; > + > + request = cdns3_next_request(&priv_ep->pending_req_list); > + list_del_init(&request->list); > + } > + > + priv_dev->u1_allowed = 0; > + priv_dev->u2_allowed = 0; > + > + priv_dev->gadget.ep0->maxpacket = max_packet_size; > + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(max_packet_size); > + > + /* init ep out */ > + cdns3_select_ep(priv_dev, USB_DIR_OUT); > + > + writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size), > + ®s->ep_cfg); > + > + writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN, > + ®s->ep_sts_en); > + > + /* init ep in */ > + cdns3_select_ep(priv_dev, USB_DIR_IN); > + > + writel(EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size), > + ®s->ep_cfg); > + > + writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, ®s->ep_sts_en); > + > + cdns3_set_register_bit(®s->usb_conf, USB_CONF_U1DS | USB_CONF_U2DS); > +} > + > +/** > + * cdns3_init_ep0 Initializes software endpoint 0 of gadget > + * @priv_dev: extended gadget object > + * @ep_priv: extended endpoint object > + * > + * Returns 0 on success else error code. > + */ > +int cdns3_init_ep0(struct cdns3_device *priv_dev, > + struct cdns3_endpoint *priv_ep) > +{ > + sprintf(priv_ep->name, "ep0"); > + > + /* fill linux fields */ > + priv_ep->endpoint.ops = &cdns3_gadget_ep0_ops; > + priv_ep->endpoint.maxburst = 1; > + usb_ep_set_maxpacket_limit(&priv_ep->endpoint, > + CDNS3_EP0_MAX_PACKET_LIMIT); > + priv_ep->endpoint.address = 0; > + priv_ep->endpoint.caps.type_control = 1; > + priv_ep->endpoint.caps.dir_in = 1; > + priv_ep->endpoint.caps.dir_out = 1; > + priv_ep->endpoint.name = priv_ep->name; > + priv_ep->endpoint.desc = &cdns3_gadget_ep0_desc; > + priv_dev->gadget.ep0 = &priv_ep->endpoint; > + priv_ep->type = USB_ENDPOINT_XFER_CONTROL; > + > + return cdns3_allocate_trb_pool(priv_ep); > +} > diff --git a/drivers/usb/cdns3/gadget-export.h b/drivers/usb/cdns3/gadget-export.h > new file mode 100644 > index 000000000000..577469eee961 > --- /dev/null > +++ b/drivers/usb/cdns3/gadget-export.h > @@ -0,0 +1,28 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Cadence USBSS DRD Driver - Gadget Export APIs. > + * > + * Copyright (C) 2017 NXP > + * Copyright (C) 2017-2018 NXP > + * > + * Authors: Peter Chen > + */ > +#ifndef __LINUX_CDNS3_GADGET_EXPORT > +#define __LINUX_CDNS3_GADGET_EXPORT > + > +#ifdef CONFIG_USB_CDNS3_GADGET > + > +int cdns3_gadget_init(struct cdns3 *cdns); > +void cdns3_gadget_exit(struct cdns3 *cdns); > +#else > + > +static inline int cdns3_gadget_init(struct cdns3 *cdns) > +{ > + return -ENXIO; > +} > + > +static inline void cdns3_gadget_exit(struct cdns3 *cdns) { } > + > +#endif > + > +#endif /* __LINUX_CDNS3_GADGET_EXPORT */ > diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c > new file mode 100644 > index 000000000000..0d95eb00be37 > --- /dev/null > +++ b/drivers/usb/cdns3/gadget.c > @@ -0,0 +1,2102 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Driver - gadget side. > + * > + * Copyright (C) 2018 Cadence Design Systems. > + * Copyright (C) 2017-2018 NXP > + * > + * Authors: Pawel Jez , > + * Pawel Laszczak > + * Peter Chen > + */ > + > +#include > +#include > + > +#include "core.h" > +#include "gadget-export.h" > +#include "gadget.h" > + > +#include "trace.h" > + > +static int __cdns3_gadget_ep_queue(struct usb_ep *ep, > + struct usb_request *request, > + gfp_t gfp_flags); > + > +/** > + * cdns3_handshake - spin reading until handshake completes or fails > + * @ptr: address of device controller register to be read > + * @mask: bits to look at in result of read > + * @done: value of those bits when handshake succeeds > + * @usec: timeout in microseconds > + * > + * Returns negative errno, or zero on success > + * > + * Success happens when the "mask" bits have the specified value (hardware > + * handshake done). There are two failure modes: "usec" have passed (major > + * hardware flakeout), or the register reads as all-ones (hardware removed). > + */ > +int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec) > +{ > + u32 result; > + > + do { > + result = readl(ptr); > + if (result == ~(u32)0) /* card removed */ > + return -ENODEV; > + result &= mask; > + if (result == done) > + return 0; > + udelay(1); > + usec--; > + } while (usec > 0); > + return -ETIMEDOUT; > +} > + > +/** > + * cdns3_set_register_bit - set bit in given register. > + * @ptr: address of device controller register to be read and changed > + * @mask: bits requested to set > + */ > +void cdns3_set_register_bit(void __iomem *ptr, u32 mask) > +{ > + mask = readl(ptr) | mask; > + writel(mask, ptr); > +} > + > +/** > + * cdns3_ep_addr_to_index - Macro converts endpoint address to > + * index of endpoint object in cdns3_device.eps[] container > + * @ep_addr: endpoint address for which endpoint object is required > + * > + */ > +u8 cdns3_ep_addr_to_index(u8 ep_addr) > +{ > + return (((ep_addr & 0x7F)) + ((ep_addr & USB_DIR_IN) ? 16 : 0)); > +} > + > +/** > + * cdns3_next_request - returns next request from list > + * @list: list containing requests > + * > + * Returns request or NULL if no requests in list > + */ > +struct usb_request *cdns3_next_request(struct list_head *list) > +{ > + if (list_empty(list)) > + return NULL; > + return list_first_entry_or_null(list, struct usb_request, list); > +} > + > +/** > + * cdns3_next_priv_request - returns next request from list > + * @list: list containing requests > + * > + * Returns request or NULL if no requests in list > + */ > +struct cdns3_request *cdns3_next_priv_request(struct list_head *list) > +{ > + if (list_empty(list)) > + return NULL; > + return list_first_entry_or_null(list, struct cdns3_request, list); > +} > + > +/** > + * select_ep - selects endpoint > + * @priv_dev: extended gadget object > + * @ep: endpoint address > + */ > +void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep) > +{ > + if (priv_dev->selected_ep == ep) > + return; > + > + priv_dev->selected_ep = ep; > + writel(ep, &priv_dev->regs->ep_sel); > +} > + > +dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep, > + struct cdns3_trb *trb) > +{ > + u32 offset = (char *)trb - (char *)priv_ep->trb_pool; > + > + return priv_ep->trb_pool_dma + offset; > +} > + > +int cdns3_ring_size(struct cdns3_endpoint *priv_ep) > +{ > + switch (priv_ep->type) { > + case USB_ENDPOINT_XFER_ISOC: > + return TRB_ISO_RING_SIZE; > + case USB_ENDPOINT_XFER_CONTROL: > + return TRB_CTRL_RING_SIZE; > + default: > + return TRB_RING_SIZE; > + } > +} > + > +/** > + * cdns3_allocate_trb_pool - Allocates TRB's pool for selected endpoint > + * @priv_ep: endpoint object > + * > + * Function will return 0 on success or -ENOMEM on allocation error > + */ > +int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + int ring_size = cdns3_ring_size(priv_ep); > + struct cdns3_trb *link_trb; > + > + if (!priv_ep->trb_pool) { > + priv_ep->trb_pool = dma_zalloc_coherent(priv_dev->sysdev, > + ring_size, > + &priv_ep->trb_pool_dma, > + GFP_DMA); > + if (!priv_ep->trb_pool) > + return -ENOMEM; > + } else { > + memset(priv_ep->trb_pool, 0, ring_size); > + } > + > + if (!priv_ep->num) > + return 0; > + > + if (!priv_ep->aligned_buff) { > + void *buff = dma_alloc_coherent(priv_dev->sysdev, > + CDNS3_ALIGNED_BUF_SIZE, > + &priv_ep->aligned_dma_addr, > + GFP_DMA); > + > + priv_ep->aligned_buff = buff; > + if (!priv_ep->aligned_buff) { > + dma_free_coherent(priv_dev->sysdev, > + ring_size, > + priv_ep->trb_pool, > + priv_ep->trb_pool_dma); > + priv_ep->trb_pool = NULL; > + > + return -ENOMEM; > + } > + } > + > + priv_ep->num_trbs = ring_size / TRB_SIZE; > + /* Initialize the last TRB as Link TRB */ > + link_trb = (priv_ep->trb_pool + (priv_ep->num_trbs - 1)); > + link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma); > + link_trb->control = TRB_CYCLE | TRB_TYPE(TRB_LINK) | > + TRB_CHAIN | TRB_TOGGLE; > + > + return 0; > +} > + > +static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + > + if (priv_ep->trb_pool) { > + dma_free_coherent(priv_dev->sysdev, > + cdns3_ring_size(priv_ep), > + priv_ep->trb_pool, priv_ep->trb_pool_dma); > + priv_ep->trb_pool = NULL; > + } > + > + if (priv_ep->aligned_buff) { > + dma_free_coherent(priv_dev->sysdev, CDNS3_ALIGNED_BUF_SIZE, > + priv_ep->aligned_buff, > + priv_ep->aligned_dma_addr); > + priv_ep->aligned_buff = NULL; > + } > +} > + > +/** > + * cdns3_data_flush - flush data at onchip buffer > + * @priv_ep: endpoint object > + * > + * Endpoint must be selected before call to this function > + * > + * Returns zero on success or negative value on failure > + */ > +static int cdns3_data_flush(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + > + writel(EP_CMD_DFLUSH, &priv_dev->regs->ep_cmd); > + > + /* wait for DFLUSH cleared */ > + return cdns3_handshake(&priv_dev->regs->ep_cmd, EP_CMD_DFLUSH, 0, 100); > +} > + > +/** > + * cdns3_ep_stall_flush - Stalls and flushes selected endpoint > + * @priv_ep: endpoint object > + * > + * Endpoint must be selected before call to this function > + */ > +static void cdns3_ep_stall_flush(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + > + writel(EP_CMD_DFLUSH | EP_CMD_ERDY | EP_CMD_SSTALL, > + &priv_dev->regs->ep_cmd); > + > + /* wait for DFLUSH cleared */ > + cdns3_handshake(&priv_dev->regs->ep_cmd, EP_CMD_DFLUSH, 0, 100); > + priv_ep->flags |= EP_STALL; > +} > + > +/** > + * cdns3_hw_reset_eps_config - reset endpoints configuration kept by controller. > + * @priv_dev: extended gadget object > + */ > +void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev) > +{ > + writel(USB_CONF_CFGRST, &priv_dev->regs->usb_conf); > + > + cdns3_allow_enable_l1(priv_dev, 0); > + priv_dev->hw_configured_flag = 0; > + priv_dev->onchip_mem_allocated_size = 0; > +} > + > +/** > + * cdns3_ep_inc_trb - increment a trb index. > + * @index: Pointer to the TRB index to increment. > + * @cs: Cycle state > + * @trb_in_seg: number of TRBs in segment > + * > + * The index should never point to the link TRB. After incrementing, > + * if it is point to the link TRB, wrap around to the beginning and revert > + * cycle state bit The > + * link TRB is always at the last TRB entry. > + */ > +static void cdns3_ep_inc_trb(int *index, u8 *cs, int trb_in_seg) > +{ > + (*index)++; > + if (*index == (trb_in_seg - 1)) { > + *index = 0; > + *cs ^= 1; > + } > +} > + > +/** > + * cdns3_ep_inc_enq - increment endpoint's enqueue pointer > + * @priv_ep: The endpoint whose enqueue pointer we're incrementing > + */ > +static void cdns3_ep_inc_enq(struct cdns3_endpoint *priv_ep) > +{ > + priv_ep->free_trbs--; > + cdns3_ep_inc_trb(&priv_ep->enqueue, &priv_ep->pcs, priv_ep->num_trbs); > +} > + > +/** > + * cdns3_ep_inc_deq - increment endpoint's dequeue pointer > + * @priv_ep: The endpoint whose dequeue pointer we're incrementing > + */ > +static void cdns3_ep_inc_deq(struct cdns3_endpoint *priv_ep) > +{ > + priv_ep->free_trbs++; > + cdns3_ep_inc_trb(&priv_ep->dequeue, &priv_ep->ccs, priv_ep->num_trbs); > +} > + > +/** > + * cdns3_allow_enable_l1 - enable/disable permits to transition to L1. > + * @priv_dev: Extended gadget object > + * @enable: Enable/disable permit to transition to L1. > + * > + * If bit USB_CONF_L1EN is set and device receive Extended Token packet, > + * then controller answer with ACK handshake. > + * If bit USB_CONF_L1DS is set and device receive Extended Token packet, > + * then controller answer with NYET handshake. > + */ > +void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable) > +{ > + if (enable) > + writel(USB_CONF_L1EN, &priv_dev->regs->usb_conf); > + else > + writel(USB_CONF_L1DS, &priv_dev->regs->usb_conf); > +} > + > +enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev) > +{ > + u32 reg; > + > + reg = readl(&priv_dev->regs->usb_sts); > + > + if (DEV_SUPERSPEED(reg)) > + return USB_SPEED_SUPER; > + else if (DEV_HIGHSPEED(reg)) > + return USB_SPEED_HIGH; > + else if (DEV_FULLSPEED(reg)) > + return USB_SPEED_FULL; > + else if (DEV_LOWSPEED(reg)) > + return USB_SPEED_LOW; > + return USB_SPEED_UNKNOWN; > +} > + > +/** > + * cdns3_start_all_request - add to ring all request not started > + * @priv_dev: Extended gadget object > + * @priv_ep: The endpoint for whom request will be started. > + * > + * Returns return ENOMEM if transfer ring i not enough TRBs to start > + * all requests. > + */ > +static int cdns3_start_all_request(struct cdns3_device *priv_dev, > + struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_request *priv_req; > + struct usb_request *request; > + int ret = 0; > + > + while (!list_empty(&priv_ep->deferred_req_list)) { > + request = cdns3_next_request(&priv_ep->deferred_req_list); > + priv_req = to_cdns3_request(request); > + > + ret = cdns3_ep_run_transfer(priv_ep, request); > + if (ret) > + return ret; > + > + list_del(&request->list); > + list_add_tail(&request->list, > + &priv_ep->pending_req_list); > + } > + > + priv_ep->flags &= ~EP_RING_FULL; > + return ret; > +} > + > +/** > + * cdns3_descmiss_copy_data copy data from internal requests to request queued > + * by class driver. > + * @priv_ep: extended endpoint object > + * @request: request object > + */ > +static void cdns3_descmiss_copy_data(struct cdns3_endpoint *priv_ep, > + struct usb_request *request) > +{ > + struct usb_request *descmiss_req; > + struct cdns3_request *descmiss_priv_req; > + > + while (!list_empty(&priv_ep->descmiss_req_list)) { > + int chunk_end; > + int length; > + > + descmiss_priv_req = > + cdns3_next_priv_request(&priv_ep->descmiss_req_list); > + descmiss_req = &descmiss_priv_req->request; > + > + /* driver can't touch pending request */ > + if (descmiss_priv_req->flags & REQUEST_PENDING) > + break; > + > + chunk_end = descmiss_priv_req->flags & REQUEST_INTERNAL_CH; > + length = request->actual + descmiss_req->actual; > + > + if (length <= request->length) { > + memcpy(&((u8 *)request->buf)[request->actual], > + descmiss_req->buf, > + descmiss_req->actual); > + request->actual = length; > + } else { > + /* It should never occures */ > + request->status = -ENOMEM; > + } > + > + list_del_init(&descmiss_priv_req->list); > + > + kfree(descmiss_req->buf); > + cdns3_gadget_ep_free_request(&priv_ep->endpoint, descmiss_req); > + > + if (!chunk_end) > + break; > + } > +} > + > +/** > + * cdns3_gadget_giveback - call struct usb_request's ->complete callback > + * @priv_ep: The endpoint to whom the request belongs to > + * @priv_req: The request we're giving back > + * @status: completion code for the request > + * > + * Must be called with controller's lock held and interrupts disabled. This > + * function will unmap @req and call its ->complete() callback to notify upper > + * layers that it has completed. > + */ > +void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep, > + struct cdns3_request *priv_req, > + int status) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + struct usb_request *request = &priv_req->request; > + > + list_del_init(&request->list); > + > + if (request->status == -EINPROGRESS) > + request->status = status; > + > + usb_gadget_unmap_request_by_dev(priv_dev->sysdev, request, > + priv_ep->dir); > + > + priv_req->flags &= ~REQUEST_PENDING; > + trace_cdns3_gadget_giveback(priv_req); > + > + /* WA1: */ > + if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN && > + priv_req->flags & REQUEST_INTERNAL) { > + struct usb_request *req; > + > + req = cdns3_next_request(&priv_ep->deferred_req_list); > + request = req; > + priv_ep->descmis_req = NULL; > + > + if (!req) > + return; > + > + cdns3_descmiss_copy_data(priv_ep, req); > + if (!(priv_ep->flags & EP_QUIRK_END_TRANSFER) && > + req->length != req->actual) { > + /* wait for next part of transfer */ > + return; > + } > + > + if (req->status == -EINPROGRESS) > + req->status = 0; > + > + list_del_init(&req->list); > + cdns3_start_all_request(priv_dev, priv_ep); > + } > + > + /* Start all not pending request */ > + if (priv_ep->flags & EP_RING_FULL) > + cdns3_start_all_request(priv_dev, priv_ep); > + > + if (request->complete) { > + spin_unlock(&priv_dev->lock); > + usb_gadget_giveback_request(&priv_ep->endpoint, > + request); > + spin_lock(&priv_dev->lock); > + } > + > + if (request->buf == priv_dev->zlp_buf) > + cdns3_gadget_ep_free_request(&priv_ep->endpoint, request); > +} > + > +/** > + * cdns3_ep_run_transfer - start transfer on no-default endpoint hardware > + * @priv_ep: endpoint object > + * > + * Returns zero on success or negative value on failure > + */ > +int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, > + struct usb_request *request) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + struct cdns3_request *priv_req; > + struct cdns3_trb *trb; > + dma_addr_t trb_dma; > + int sg_iter = 0; > + u32 first_pcs; > + int num_trb; > + int address; > + int pcs; > + > + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC) > + num_trb = priv_ep->interval; > + else > + num_trb = request->num_sgs ? request->num_sgs : 1; > + > + if (num_trb > priv_ep->free_trbs) { > + priv_ep->flags |= EP_RING_FULL; > + return -ENOBUFS; > + } > + > + priv_req = to_cdns3_request(request); > + address = priv_ep->endpoint.desc->bEndpointAddress; > + > + priv_ep->flags |= EP_PENDING_REQUEST; > + trb_dma = request->dma; > + > + /* must allocate buffer aligned to 8 */ > + if ((request->dma % 8)) { > + if (request->length <= CDNS3_ALIGNED_BUF_SIZE) { > + memcpy(priv_ep->aligned_buff, request->buf, > + request->length); > + trb_dma = priv_ep->aligned_dma_addr; > + } else { > + return -ENOMEM; > + } > + } > + > + trb = priv_ep->trb_pool + priv_ep->enqueue; > + priv_req->start_trb = priv_ep->enqueue; > + priv_req->trb = trb; > + > + /* prepare ring */ > + if ((priv_ep->enqueue + num_trb) >= (priv_ep->num_trbs - 1)) { > + /*updating C bt in Link TRB before starting DMA*/ > + struct cdns3_trb *link_trb = priv_ep->trb_pool + > + (priv_ep->num_trbs - 1); > + link_trb->control = ((priv_ep->pcs) ? TRB_CYCLE : 0) | > + TRB_TYPE(TRB_LINK) | TRB_CHAIN | > + TRB_TOGGLE; > + } > + > + first_pcs = priv_ep->pcs ? TRB_CYCLE : 0; > + > + do { > + /* fill TRB */ > + trb->buffer = TRB_BUFFER(request->num_sgs == 0 > + ? trb_dma : request->sg[sg_iter].dma_address); > + > + trb->length = TRB_BURST_LEN(16) | > + TRB_LEN(request->num_sgs == 0 ? > + request->length : request->sg[sg_iter].length); > + > + trb->control = TRB_TYPE(TRB_NORMAL); > + pcs = priv_ep->pcs ? TRB_CYCLE : 0; > + > + /* > + * first trb should be prepared as last to avoid processing > + * transfer to early > + */ > + if (sg_iter != 0) > + trb->control |= pcs; > + > + if (priv_ep->type == USB_ENDPOINT_XFER_ISOC && !priv_ep->dir) { > + trb->control |= TRB_IOC | TRB_ISP; > + } else { > + /* for last element in TD or in SG list */ > + if (sg_iter == (num_trb - 1) && sg_iter != 0) > + trb->control |= pcs | TRB_IOC | TRB_ISP; > + } > + ++sg_iter; > + priv_req->end_trb = priv_ep->enqueue; > + cdns3_ep_inc_enq(priv_ep); > + trb = priv_ep->trb_pool + priv_ep->enqueue; > + } while (sg_iter < num_trb); > + > + trb = priv_req->trb; > + > + /* > + * Memory barrier = Cycle Bit must be set before trb->length and > + * trb->buffer fields. > + */ > + wmb(); > + > + priv_req->flags |= REQUEST_PENDING; > + > + /* give the TD to the consumer*/ > + if (sg_iter == 1) > + trb->control |= first_pcs | TRB_IOC | TRB_ISP; > + else > + trb->control |= first_pcs; > + > + trace_cdns3_prepare_trb(priv_ep, priv_req->trb); > + trace_cdns3_ring(priv_ep); > + > + /* arm transfer on selected endpoint */ > + cdns3_select_ep(priv_ep->cdns3_dev, address); > + > + /* > + * For DMULT mode we can set address to transfer ring only once after > + * enabling endpoint. > + */ > + if (priv_ep->flags & EP_UPDATE_EP_TRBADDR) { > + writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), > + &priv_dev->regs->ep_traddr); > + priv_ep->flags &= ~EP_UPDATE_EP_TRBADDR; > + } > + > + /*clearing TRBERR and EP_STS_DESCMIS before seting DRDY*/ > + writel(EP_STS_TRBERR | EP_STS_DESCMIS, &priv_dev->regs->ep_sts); > + trace_cdns3_doorbell_epx(priv_ep->name, > + readl(&priv_dev->regs->ep_traddr)); > + writel(EP_CMD_DRDY, &priv_dev->regs->ep_cmd); > + > + return 0; > +} > + > +void cdns3_set_hw_configuration(struct cdns3_device *priv_dev) > +{ > + struct cdns3_endpoint *priv_ep; > + struct usb_ep *ep; > + int result = 0; > + > + if (priv_dev->hw_configured_flag) > + return; > + > + writel(USB_CONF_CFGSET, &priv_dev->regs->usb_conf); > + writel(EP_CMD_ERDY | EP_CMD_REQ_CMPL, &priv_dev->regs->ep_cmd); > + > + cdns3_set_register_bit(&priv_dev->regs->usb_conf, > + USB_CONF_U1EN | USB_CONF_U2EN); > + > + /* wait until configuration set */ > + result = cdns3_handshake(&priv_dev->regs->usb_sts, > + USB_STS_CFGSTS_MASK, 1, 100); > + > + priv_dev->hw_configured_flag = 1; > + cdns3_allow_enable_l1(priv_dev, 1); > + > + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) { > + if (ep->enabled) { > + priv_ep = ep_to_cdns3_ep(ep); > + cdns3_start_all_request(priv_dev, priv_ep); > + } > + } > +} > + > +/** > + * cdns3_request_handled - check whether request has been handled by DMA > + * > + * @priv_ep: extended endpoint object. > + * @priv_req: request object for checking > + * > + * Endpoint must be selected before invoking this function. > + * > + * Returns false if request has not been handled by DMA, else returns true. > + * > + * SR - start ring > + * ER - end ring > + * DQ = priv_ep->dequeue - dequeue position > + * EQ = priv_ep->enqueue - enqueue position > + * ST = priv_req->start_trb - index of first TRB in transfer ring > + * ET = priv_req->end_trb - index of last TRB in transfer ring > + * CI = current_index - index of processed TRB by DMA. > + * > + * As first step, function checks if cycle bit for priv_req->start_trb is > + * correct. > + * > + * some rules: > + * 1. priv_ep->dequeue never exceed current_index. > + * 2 priv_ep->enqueue never exceed priv_ep->dequeue > + * > + * Then We can split recognition into two parts: > + * Case 1 - priv_ep->dequeue < current_index > + * SR ... EQ ... DQ ... CI ... ER > + * SR ... DQ ... CI ... EQ ... ER > + * > + * Request has been handled by DMA if ST and ET is between DQ and CI. > + * > + * Case 2 - priv_ep->dequeue > current_index > + * This situation take place when CI go through the LINK TRB at the end of > + * transfer ring. > + * SR ... CI ... EQ ... DQ ... ER > + * > + * Request has been handled by DMA if ET is less then CI or > + * ET is greater or equal DQ. > + */ > +static bool cdns3_request_handled(struct cdns3_endpoint *priv_ep, > + struct cdns3_request *priv_req) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + struct cdns3_trb *trb = priv_req->trb; > + int current_index = 0; > + int handled = 0; > + > + current_index = (readl(&priv_dev->regs->ep_traddr) - > + priv_ep->trb_pool_dma) / TRB_SIZE; > + > + trb = &priv_ep->trb_pool[priv_req->start_trb]; > + > + if ((trb->control & TRB_CYCLE) != priv_ep->ccs) > + goto finish; > + > + if (priv_ep->dequeue < current_index) { > + if ((current_index == (priv_ep->num_trbs - 1)) && > + !priv_ep->dequeue) > + goto finish; > + > + if (priv_req->end_trb >= priv_ep->dequeue && > + priv_req->end_trb < current_index) > + handled = 1; > + } else if (priv_ep->dequeue > current_index) { > + if (priv_req->end_trb < current_index || > + priv_req->end_trb >= priv_ep->dequeue) > + handled = 1; > + } > + > +finish: > + trace_cdns3_request_handled(priv_req, current_index, handled); > + > + return handled; > +} > + > +static void cdns3_transfer_completed(struct cdns3_device *priv_dev, > + struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_request *priv_req; > + struct usb_request *request; > + struct cdns3_trb *trb; > + int current_trb; > + > + while (!list_empty(&priv_ep->pending_req_list)) { > + request = cdns3_next_request(&priv_ep->pending_req_list); > + priv_req = to_cdns3_request(request); > + > + if (!cdns3_request_handled(priv_ep, priv_req)) > + return; > + > + if (request->dma % 8 && priv_ep->dir == USB_DIR_OUT) > + memcpy(request->buf, priv_ep->aligned_buff, > + request->length); > + > + trb = priv_ep->trb_pool + priv_ep->dequeue; > + trace_cdns3_complete_trb(priv_ep, trb); > + > + if (trb != priv_req->trb) > + dev_warn(priv_dev->dev, > + "request_trb=0x%p, queue_trb=0x%p\n", > + priv_req->trb, trb); > + > + request->actual = TRB_LEN(le32_to_cpu(trb->length)); > + current_trb = priv_req->start_trb; > + > + while (current_trb != priv_req->end_trb) { > + cdns3_ep_inc_deq(priv_ep); > + current_trb = priv_ep->dequeue; > + } > + > + cdns3_ep_inc_deq(priv_ep); > + cdns3_gadget_giveback(priv_ep, priv_req, 0); > + } > + priv_ep->flags &= ~EP_PENDING_REQUEST; > +} > + > +/** > + * cdns3_descmissing_packet - handles descriptor missing event. > + * @priv_dev: extended gadget object > + * > + * WA1: Controller for OUT endpoints has shared on-chip buffers for all incoming > + * packets, including ep0out. It's FIFO buffer, so packets must be handle by DMA > + * in correct order. If the first packet in the buffer will not be handled, > + * then the following packets directed for other endpoints and functions > + * will be blocked. > + * Additionally the packets directed to one endpoint can block entire on-chip > + * buffers. In this case transfer to other endpoints also will blocked. > + * > + * To resolve this issue after raising the descriptor missing interrupt > + * driver prepares internal usb_request object and use it to arm DMA transfer. > + * > + * The problematic situation was observed in case when endpoint has been enabled > + * but no usb_request were queued. Driver try detects such endpoints and will > + * use this workaround only for these endpoint. > + * > + * Driver use limited number of buffer. This number can be set by macro > + * CDNS_WA1_NUM_BUFFERS. > + * > + * Such blocking situation was observed on ACM gadget. For this function > + * host send OUT data packet but ACM function is not prepared for this packet. > + * > + * It's limitation of controller but maybe this issues should be fixed in > + * function driver. > + */ > +static int cdns3_descmissing_packet(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_request *priv_req; > + struct usb_request *request; > + > + if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET) { > + priv_ep->flags &= ~EP_QUIRK_EXTRA_BUF_DET; > + priv_ep->flags |= EP_QUIRK_EXTRA_BUF_EN; > + } > + > + request = cdns3_gadget_ep_alloc_request(&priv_ep->endpoint, > + GFP_ATOMIC); > + if (!request) > + return -ENOMEM; > + > + priv_req = to_cdns3_request(request); > + priv_req->flags |= REQUEST_INTERNAL; > + > + /* if this field is still assigned it indicate that transfer related > + * with this request has not been finished yet. Driver in this > + * case simply allocate next request and assign flag REQUEST_INTERNAL_CH > + * flag to previous one. It will indicate that current request is > + * part of the previous one. > + */ > + if (priv_ep->descmis_req) > + priv_ep->descmis_req->flags |= REQUEST_INTERNAL_CH; > + > + priv_req->request.buf = kzalloc(CDNS3_DESCMIS_BUF_SIZE, > + GFP_ATOMIC); > + if (!priv_req) { > + cdns3_gadget_ep_free_request(&priv_ep->endpoint, request); > + return -ENOMEM; > + } > + > + priv_req->request.length = CDNS3_DESCMIS_BUF_SIZE; > + priv_ep->descmis_req = priv_req; > + > + __cdns3_gadget_ep_queue(&priv_ep->endpoint, > + &priv_ep->descmis_req->request, > + GFP_ATOMIC); > + > + return 0; > +} > + > +/** > + * cdns3_check_ep_interrupt_proceed - Processes interrupt related to endpoint > + * @priv_ep: endpoint object > + * > + * Returns 0 > + */ > +static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep) > +{ > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + u32 ep_sts_reg; > + > + cdns3_select_ep(priv_dev, priv_ep->endpoint.address); > + > + trace_cdns3_epx_irq(priv_dev, priv_ep); > + > + ep_sts_reg = readl(&priv_dev->regs->ep_sts); > + writel(ep_sts_reg, &priv_dev->regs->ep_sts); > + > + if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) { > + if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN) { > + if (ep_sts_reg & EP_STS_ISP) > + priv_ep->flags |= EP_QUIRK_END_TRANSFER; > + else > + priv_ep->flags &= ~EP_QUIRK_END_TRANSFER; > + } > + cdns3_transfer_completed(priv_dev, priv_ep); > + } > + > + /* > + * For isochronous transfer driver completes request on IOC or on > + * TRBERR. IOC appears only when device receive OUT data packet. > + * If host disable stream or lost some packet then the only way to > + * finish all queued transfer is to do it on TRBERR event. > + */ > + if ((ep_sts_reg & EP_STS_TRBERR) && > + priv_ep->type == USB_ENDPOINT_XFER_ISOC) > + cdns3_transfer_completed(priv_dev, priv_ep); > + > + /* > + * WA1: this condition should only be meet when > + * priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET or > + * priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN. > + * In other cases this interrupt will be disabled/ > + */ > + if (ep_sts_reg & EP_STS_DESCMIS) { > + int err; > + > + err = cdns3_descmissing_packet(priv_ep); > + if (err) > + dev_err(priv_dev->dev, > + "Failed: No sufficient memory for DESCMIS\n"); > + } > + > + return 0; > +} > + > +/** > + * cdns3_check_usb_interrupt_proceed - Processes interrupt related to device > + * @priv_dev: extended gadget object > + * @usb_ists: bitmap representation of device's reported interrupts > + * (usb_ists register value) > + */ > +static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev, > + u32 usb_ists) > +{ > + int speed = 0; > + > + trace_cdns3_usb_irq(priv_dev, usb_ists); > + /* Connection detected */ > + if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) { > + speed = cdns3_get_speed(priv_dev); > + priv_dev->gadget.speed = speed; > + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_POWERED); > + cdns3_ep0_config(priv_dev); > + } > + > + /* Disconnection detected */ > + if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) { > + if (priv_dev->gadget_driver && > + priv_dev->gadget_driver->disconnect) { > + spin_unlock(&priv_dev->lock); > + priv_dev->gadget_driver->disconnect(&priv_dev->gadget); > + spin_lock(&priv_dev->lock); > + } > + > + priv_dev->gadget.speed = USB_SPEED_UNKNOWN; > + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED); > + cdns3_hw_reset_eps_config(priv_dev); > + } > + > + /* reset*/ > + if (usb_ists & (USB_ISTS_UWRESI | USB_ISTS_UHRESI | USB_ISTS_U2RESI)) { > + /*read again to check the actuall speed*/ > + speed = cdns3_get_speed(priv_dev); > + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_DEFAULT); > + priv_dev->gadget.speed = speed; > + cdns3_hw_reset_eps_config(priv_dev); > + cdns3_ep0_config(priv_dev); > + } > +} > + > +/** > + * cdns3_device_irq_handler- interrupt handler for device part of controller > + * > + * @irq: irq number for cdns3 core device > + * @data: structure of cdns3 > + * > + * Returns IRQ_HANDLED or IRQ_NONE > + */ > +static irqreturn_t cdns3_device_irq_handler(int irq, void *data) > +{ > + struct cdns3_device *priv_dev; > + struct cdns3 *cdns = data; > + irqreturn_t ret = IRQ_NONE; > + unsigned long flags; > + u32 reg; > + > + priv_dev = cdns->gadget_dev; > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + /* check USB device interrupt */ > + reg = readl(&priv_dev->regs->usb_ists); > + writel(reg, &priv_dev->regs->usb_ists); > + > + if (reg) { > + cdns3_check_usb_interrupt_proceed(priv_dev, reg); > + ret = IRQ_HANDLED; > + } > + > + /* check endpoint interrupt */ > + reg = readl(&priv_dev->regs->ep_ists); > + > + if (reg) { > + reg = ~reg & readl(&priv_dev->regs->ep_ien); > + /* mask deferred interrupt. */ > + writel(reg, &priv_dev->regs->ep_ien); > + ret = IRQ_WAKE_THREAD; > + } > + > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return ret; > +} > + > +/** > + * cdns3_device_thread_irq_handler- interrupt handler for device part > + * of controller > + * > + * @irq: irq number for cdns3 core device > + * @data: structure of cdns3 > + * > + * Returns IRQ_HANDLED or IRQ_NONE > + */ > +static irqreturn_t cdns3_device_thread_irq_handler(int irq, void *data) > +{ > + struct cdns3_device *priv_dev; > + struct cdns3 *cdns = data; > + irqreturn_t ret = IRQ_NONE; > + unsigned long flags; > + u32 ep_ien; > + int bit; > + u32 reg; > + > + priv_dev = cdns->gadget_dev; > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + reg = readl(&priv_dev->regs->ep_ists); > + ep_ien = reg; > + > + /* handle default endpoint OUT */ > + if (reg & EP_ISTS_EP_OUT0) { > + cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_OUT); > + ret = IRQ_HANDLED; > + } > + > + /* handle default endpoint IN */ > + if (reg & EP_ISTS_EP_IN0) { > + cdns3_check_ep0_interrupt_proceed(priv_dev, USB_DIR_IN); > + ret = IRQ_HANDLED; > + } > + > + /* check if interrupt from non default endpoint, if no exit */ > + reg &= ~(EP_ISTS_EP_OUT0 | EP_ISTS_EP_IN0); > + if (!reg) > + goto irqend; > + > + for_each_set_bit(bit, (unsigned long *)®, > + sizeof(u32) * BITS_PER_BYTE) { > + cdns3_check_ep_interrupt_proceed(priv_dev->eps[bit]); > + ret = IRQ_HANDLED; > + } > + > +irqend: > + ep_ien |= readl(&priv_dev->regs->ep_ien); > + /* Unmask all handled EP interrupts */ > + writel(ep_ien, &priv_dev->regs->ep_ien); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return ret; > +} > + > +/** > + * cdns3_ep_onchip_buffer_reserve - Try to reserve onchip buf for EP > + * > + * The real reservation will occur during write to EP_CFG register, > + * this function is used to check if the 'size' reservation is allowed. > + * > + * @priv_dev: extended gadget object > + * @size: the size (KB) for EP would like to allocate > + * > + * Return 0 if the required size can met or negative value on failure > + */ > +static int cdns3_ep_onchip_buffer_reserve(struct cdns3_device *priv_dev, > + int size) > +{ > + u32 onchip_mem; > + > + priv_dev->onchip_mem_allocated_size += size; > + > + onchip_mem = USB_CAP2_ACTUAL_MEM_SIZE(readl(&priv_dev->regs->usb_cap2)); > + if (!onchip_mem) > + onchip_mem = 256; > + > + /* 2KB is reserved for EP0*/ > + onchip_mem -= 2; > + if (priv_dev->onchip_mem_allocated_size > onchip_mem) { > + priv_dev->onchip_mem_allocated_size -= size; > + return -EPERM; > + } > + > + return 0; > +} > + > +/** > + * cdns3_ep_config Configure hardware endpoint > + * @priv_ep: extended endpoint object > + */ > +void cdns3_ep_config(struct cdns3_endpoint *priv_ep) > +{ > + bool is_iso_ep = (priv_ep->type == USB_ENDPOINT_XFER_ISOC); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + u32 bEndpointAddress = priv_ep->num | priv_ep->dir; > + u32 max_packet_size = 0; > + u32 ep_cfg = 0; > + int ret; > + > + switch (priv_ep->type) { > + case USB_ENDPOINT_XFER_INT: > + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT); > + break; > + case USB_ENDPOINT_XFER_BULK: > + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK); > + break; > + default: > + ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_ISOC); > + } > + > + switch (priv_dev->gadget.speed) { > + case USB_SPEED_FULL: > + max_packet_size = is_iso_ep ? 1023 : 64; > + break; > + case USB_SPEED_HIGH: > + max_packet_size = is_iso_ep ? 1024 : 512; > + break; > + case USB_SPEED_SUPER: > + max_packet_size = 1024; > + break; > + default: > + /* all other speed are not supported */ > + return; > + } > + > + ret = cdns3_ep_onchip_buffer_reserve(priv_dev, CDNS3_EP_BUF_SIZE); > + if (ret) { > + dev_err(priv_dev->dev, "onchip mem is full, ep is invalid\n"); > + return; > + } > + > + ep_cfg |= EP_CFG_MAXPKTSIZE(max_packet_size) | > + EP_CFG_BUFFERING(CDNS3_EP_BUF_SIZE - 1) | > + EP_CFG_MAXBURST(priv_ep->endpoint.maxburst); > + > + cdns3_select_ep(priv_dev, bEndpointAddress); > + writel(ep_cfg, &priv_dev->regs->ep_cfg); > + > + dev_dbg(priv_dev->dev, "Configure %s: with val %08x\n", > + priv_ep->name, ep_cfg); > +} > + > +/* Find correct direction for HW endpoint according to description */ > +static int cdns3_ep_dir_is_correct(struct usb_endpoint_descriptor *desc, > + struct cdns3_endpoint *priv_ep) > +{ > + return (priv_ep->endpoint.caps.dir_in && usb_endpoint_dir_in(desc)) || > + (priv_ep->endpoint.caps.dir_out && usb_endpoint_dir_out(desc)); > +} > + > +static struct > +cdns3_endpoint *cdns3_find_available_ep(struct cdns3_device *priv_dev, > + struct usb_endpoint_descriptor *desc) > +{ > + struct usb_ep *ep; > + struct cdns3_endpoint *priv_ep; > + > + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) { > + unsigned long num; > + int ret; > + /* ep name pattern likes epXin or epXout */ > + char c[2] = {ep->name[2], '\0'}; > + > + ret = kstrtoul(c, 10, &num); > + if (ret) > + return ERR_PTR(ret); > + > + priv_ep = ep_to_cdns3_ep(ep); > + if (cdns3_ep_dir_is_correct(desc, priv_ep)) { > + if (!(priv_ep->flags & EP_CLAIMED)) { > + priv_ep->num = num; > + return priv_ep; > + } > + } > + } > + > + return ERR_PTR(-ENOENT); > +} > + > +/* > + * Cadence IP has one limitation that all endpoints must be configured > + * (Type & MaxPacketSize) before setting configuration through hardware > + * register, it means we can't change endpoints configuration after > + * set_configuration. > + * > + * This function set EP_CLAIMED flag which is added when the gadget driver > + * uses usb_ep_autoconfig to configure specific endpoint; > + * When the udc driver receives set_configurion request, > + * it goes through all claimed endpoints, and configure all endpoints > + * accordingly. > + * > + * At usb_ep_ops.enable/disable, we only enable and disable endpoint through > + * ep_cfg register which can be changed after set_configuration, and do > + * some software operation accordingly. > + */ > +static struct > +usb_ep *cdns3_gadget_match_ep(struct usb_gadget *gadget, > + struct usb_endpoint_descriptor *desc, > + struct usb_ss_ep_comp_descriptor *comp_desc) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + struct cdns3_endpoint *priv_ep; > + unsigned long flags; > + > + priv_ep = cdns3_find_available_ep(priv_dev, desc); > + if (IS_ERR(priv_ep)) { > + dev_err(priv_dev->dev, "no available ep\n"); > + return NULL; > + } > + > + dev_dbg(priv_dev->dev, "match endpoint: %s\n", priv_ep->name); > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + priv_ep->endpoint.desc = desc; > + priv_ep->dir = usb_endpoint_dir_in(desc) ? USB_DIR_IN : USB_DIR_OUT; > + priv_ep->type = usb_endpoint_type(desc); > + priv_ep->flags |= EP_CLAIMED; > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return &priv_ep->endpoint; > +} > + > +/** > + * cdns3_gadget_ep_alloc_request Allocates request > + * @ep: endpoint object associated with request > + * @gfp_flags: gfp flags > + * > + * Returns allocated request address, NULL on allocation error > + */ > +struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep, > + gfp_t gfp_flags) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_request *priv_req; > + > + priv_req = kzalloc(sizeof(*priv_req), gfp_flags); > + if (!priv_req) > + return NULL; > + > + priv_req->priv_ep = priv_ep; > + > + trace_cdns3_alloc_request(priv_req); > + return &priv_req->request; > +} > + > +/** > + * cdns3_gadget_ep_free_request Free memory occupied by request > + * @ep: endpoint object associated with request > + * @request: request to free memory > + */ > +void cdns3_gadget_ep_free_request(struct usb_ep *ep, > + struct usb_request *request) > +{ > + struct cdns3_request *priv_req = to_cdns3_request(request); > + > + trace_cdns3_free_request(priv_req); > + kfree(priv_req); > +} > + > +/** > + * cdns3_gadget_ep_enable Enable endpoint > + * @ep: endpoint object > + * @desc: endpoint descriptor > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int cdns3_gadget_ep_enable(struct usb_ep *ep, > + const struct usb_endpoint_descriptor *desc) > +{ > + struct cdns3_endpoint *priv_ep; > + struct cdns3_device *priv_dev; > + u32 reg = EP_STS_EN_TRBERREN; > + u32 bEndpointAddress; > + unsigned long flags; > + int ret; > + > + priv_ep = ep_to_cdns3_ep(ep); > + priv_dev = priv_ep->cdns3_dev; > + > + if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { > + dev_dbg(priv_dev->dev, "usbss: invalid parameters\n"); > + return -EINVAL; > + } > + > + if (!desc->wMaxPacketSize) { > + dev_err(priv_dev->dev, "usbss: missing wMaxPacketSize\n"); > + return -EINVAL; > + } > + > + if (dev_WARN_ONCE(priv_dev->dev, priv_ep->flags & EP_ENABLED, > + "%s is already enabled\n", priv_ep->name)) > + return 0; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + priv_ep->endpoint.desc = desc; > + priv_ep->type = usb_endpoint_type(desc); > + priv_ep->interval = desc->bInterval ? BIT(desc->bInterval - 1) : 0; > + > + if (priv_ep->interval > ISO_MAX_INTERVAL && > + priv_ep->type == USB_ENDPOINT_XFER_ISOC) { > + dev_err(priv_dev->dev, "Driver is limited to %d period\n", > + ISO_MAX_INTERVAL); > + > + ret = -EINVAL; > + goto exit; > + } > + > + ret = cdns3_allocate_trb_pool(priv_ep); > + > + if (ret) > + goto exit; > + > + bEndpointAddress = priv_ep->num | priv_ep->dir; > + cdns3_select_ep(priv_dev, bEndpointAddress); > + > + trace_cdns3_gadget_ep_enable(priv_ep); > + > + writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd); > + > + ret = cdns3_handshake(&priv_dev->regs->ep_cmd, > + EP_CMD_CSTALL | EP_CMD_EPRST, 0, 100); > + > + /* enable interrupt for selected endpoint */ > + cdns3_set_register_bit(&priv_dev->regs->ep_ien, > + BIT(cdns3_ep_addr_to_index(bEndpointAddress))); > + /* > + * WA1: Set flag for all not ISOC OUT endpoints. If this flag is set > + * driver try to detect whether endpoint need additional internal > + * buffer for unblocking on-chip FIFO buffer. This flag will be cleared > + * if before first DESCMISS interrupt the DMA will be armed. > + */ > + if (!priv_ep->dir && priv_ep->type != USB_ENDPOINT_XFER_ISOC) { > + priv_ep->flags |= EP_QUIRK_EXTRA_BUF_DET; > + reg |= EP_STS_EN_DESCMISEN; > + } > + > + writel(reg, &priv_dev->regs->ep_sts_en); > + > + cdns3_set_register_bit(&priv_dev->regs->ep_cfg, EP_CFG_ENABLE); > + > + ep->desc = desc; > + priv_ep->flags &= ~(EP_PENDING_REQUEST | EP_STALL | > + EP_QUIRK_EXTRA_BUF_EN); > + priv_ep->flags |= EP_ENABLED | EP_UPDATE_EP_TRBADDR; > + priv_ep->enqueue = 0; > + priv_ep->dequeue = 0; > + reg = readl(&priv_dev->regs->ep_sts); > + priv_ep->pcs = !!EP_STS_CCS(reg); > + priv_ep->ccs = !!EP_STS_CCS(reg); > + /* one TRB is reserved for link TRB used in DMULT mode*/ > + priv_ep->free_trbs = priv_ep->num_trbs - 1; > +exit: > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + > + return ret; > +} > + > +/** > + * cdns3_gadget_ep_disable Disable endpoint > + * @ep: endpoint object > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int cdns3_gadget_ep_disable(struct usb_ep *ep) > +{ > + struct cdns3_endpoint *priv_ep; > + struct cdns3_request *priv_req; > + struct cdns3_device *priv_dev; > + struct usb_request *request; > + unsigned long flags; > + int ret = 0; > + u32 ep_cfg; > + > + if (!ep) { > + pr_err("usbss: invalid parameters\n"); > + return -EINVAL; > + } > + > + priv_ep = ep_to_cdns3_ep(ep); > + priv_dev = priv_ep->cdns3_dev; > + > + if (dev_WARN_ONCE(priv_dev->dev, !(priv_ep->flags & EP_ENABLED), > + "%s is already disabled\n", priv_ep->name)) > + return 0; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + trace_cdns3_gadget_ep_disable(priv_ep); > + > + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress); > + ret = cdns3_data_flush(priv_ep); > + > + ep_cfg = readl(&priv_dev->regs->ep_cfg); > + ep_cfg &= ~EP_CFG_ENABLE; > + writel(ep_cfg, &priv_dev->regs->ep_cfg); > + > + while (!list_empty(&priv_ep->pending_req_list)) { > + request = cdns3_next_request(&priv_ep->pending_req_list); > + > + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), > + -ESHUTDOWN); > + } > + > + while (!list_empty(&priv_ep->descmiss_req_list)) { > + priv_req = cdns3_next_priv_request(&priv_ep->descmiss_req_list); > + > + kfree(priv_req->request.buf); > + cdns3_gadget_ep_free_request(&priv_ep->endpoint, > + &priv_req->request); > + } > + > + while (!list_empty(&priv_ep->deferred_req_list)) { > + request = cdns3_next_request(&priv_ep->deferred_req_list); > + > + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), > + -ESHUTDOWN); > + } > + > + priv_ep->descmis_req = NULL; > + > + ep->desc = NULL; > + priv_ep->flags &= ~EP_ENABLED; > + > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + > + return ret; > +} > + > +/** > + * cdns3_gadget_ep_queue Transfer data on endpoint > + * @ep: endpoint object > + * @request: request object > + * @gfp_flags: gfp flags > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int __cdns3_gadget_ep_queue(struct usb_ep *ep, > + struct usb_request *request, > + gfp_t gfp_flags) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + struct cdns3_request *priv_req; > + int deferred = 0; > + int ret = 0; > + > + request->actual = 0; > + request->status = -EINPROGRESS; > + priv_req = to_cdns3_request(request); > + trace_cdns3_ep_queue(priv_req); > + > + /* > + * WA1: if transfer was queued before DESCMISS appear than we > + * can disable handling of DESCMISS interrupt. Driver assumes that it > + * can disable special treatment for this endpoint. > + */ > + if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_DET) { > + u32 reg; > + > + cdns3_select_ep(priv_dev, priv_ep->num | priv_ep->dir); > + reg = readl(&priv_dev->regs->ep_sts_en); > + priv_ep->flags &= ~EP_QUIRK_EXTRA_BUF_DET; > + reg &= EP_STS_EN_DESCMISEN; > + writel(reg, &priv_dev->regs->ep_sts_en); > + } > + > + /* WA1 */ > + if (priv_ep->flags & EP_QUIRK_EXTRA_BUF_EN) { > + u8 pending_empty = list_empty(&priv_ep->pending_req_list); > + u8 descmiss_empty = list_empty(&priv_ep->descmiss_req_list); > + > + /* > + * DESCMISS transfer has been finished, so data will be > + * directly copied from internal allocated usb_request > + * objects. > + */ > + if (pending_empty && !descmiss_empty && > + !(priv_req->flags & REQUEST_INTERNAL)) { > + cdns3_descmiss_copy_data(priv_ep, request); > + list_add_tail(&request->list, > + &priv_ep->pending_req_list); > + cdns3_gadget_giveback(priv_ep, priv_req, > + request->status); > + return ret; > + } > + > + /* > + * WA1 driver will wait for completion DESCMISS transfer, > + * before starts new, not DESCMISS transfer. > + */ > + if (!pending_empty && !descmiss_empty) > + deferred = 1; > + > + if (priv_req->flags & REQUEST_INTERNAL) > + list_add_tail(&priv_req->list, > + &priv_ep->descmiss_req_list); > + } > + > + ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request, > + usb_endpoint_dir_in(ep->desc)); > + if (ret) > + return ret; > + > + /* > + * If hardware endpoint configuration has not been set yet then > + * just queue request in deferred list. Transfer will be started in > + * cdns3_set_hw_configuration. > + */ > + if (!priv_dev->hw_configured_flag) > + deferred = 1; > + else > + ret = cdns3_ep_run_transfer(priv_ep, request); > + > + if (ret || deferred) > + list_add_tail(&request->list, &priv_ep->deferred_req_list); > + else > + list_add_tail(&request->list, &priv_ep->pending_req_list); > + > + return ret; > +} > + > +static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, > + gfp_t gfp_flags) > +{ > + struct usb_request *zlp_request; > + struct cdns3_endpoint *priv_ep; > + struct cdns3_device *priv_dev; > + unsigned long flags; > + int ret; > + > + if (!request || !ep) > + return -EINVAL; > + > + priv_ep = ep_to_cdns3_ep(ep); > + priv_dev = priv_ep->cdns3_dev; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + ret = __cdns3_gadget_ep_queue(ep, request, gfp_flags); > + > + if (ret == 0 && request->zero && request->length && > + (request->length % ep->maxpacket == 0)) { > + struct cdns3_request *priv_req; > + > + zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC); > + zlp_request->buf = priv_dev->zlp_buf; > + zlp_request->length = 0; > + > + priv_req = to_cdns3_request(zlp_request); > + priv_req->flags |= REQUEST_ZLP; > + > + dev_dbg(priv_dev->dev, "Queuing ZLP for endpoint: %s\n", > + priv_ep->name); > + ret = __cdns3_gadget_ep_queue(ep, zlp_request, gfp_flags); > + } > + > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return ret; > +} > + > +/** > + * cdns3_gadget_ep_dequeue Remove request from transfer queue > + * @ep: endpoint object associated with request > + * @request: request object > + * > + * Returns 0 on success, error code elsewhere > + */ > +int cdns3_gadget_ep_dequeue(struct usb_ep *ep, > + struct usb_request *request) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + struct usb_request *req, *req_temp; > + struct cdns3_request *priv_req; > + unsigned long flags; > + int ret = 0; > + > + if (!ep || !request || !ep->desc) > + return -EINVAL; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + priv_req = to_cdns3_request(request); > + > + trace_cdns3_ep_dequeue(priv_req); > + > + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress); > + > + list_for_each_entry_safe(req, req_temp, &priv_ep->pending_req_list, > + list) { > + if (request == req) > + goto found; > + } > + > + list_for_each_entry_safe(req, req_temp, &priv_ep->deferred_req_list, > + list) { > + if (request == req) > + goto found; > + } > + > +found: > + if (request == req) > + cdns3_gadget_giveback(priv_ep, priv_req, -ECONNRESET); > + > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return ret; > +} > + > +/** > + * cdns3_gadget_ep_set_halt Sets/clears stall on selected endpoint > + * @ep: endpoint object to set/clear stall on > + * @value: 1 for set stall, 0 for clear stall > + * > + * Returns 0 on success, error code elsewhere > + */ > +int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value) > +{ > + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); > + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; > + unsigned long flags; > + int ret = 0; > + > + if (!(priv_ep->flags & EP_ENABLED)) > + return -EPERM; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + /* if actual transfer is pending defer setting stall on this endpoint */ > + if ((priv_ep->flags & EP_PENDING_REQUEST) && value) { > + priv_ep->flags |= EP_STALL; > + goto finish; > + } > + > + dev_dbg(priv_dev->dev, "Halt endpoint %s\n", priv_ep->name); > + > + cdns3_select_ep(priv_dev, ep->desc->bEndpointAddress); > + if (value) { > + cdns3_ep_stall_flush(priv_ep); > + } else { > + priv_ep->flags &= ~EP_WEDGE; > + writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd); > + > + /* wait for EPRST cleared */ > + ret = cdns3_handshake(&priv_dev->regs->ep_cmd, > + EP_CMD_EPRST, 0, 100); > + if (unlikely(ret)) { > + dev_err(priv_dev->dev, > + "Clearing halt condition failed for %s\n", > + priv_ep->name); > + goto finish; > + > + } else { > + priv_ep->flags &= ~EP_STALL; > + } > + } > + > + priv_ep->flags &= ~EP_PENDING_REQUEST; > +finish: > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + > + return ret; > +} > + > +extern const struct usb_ep_ops cdns3_gadget_ep0_ops; > + > +static const struct usb_ep_ops cdns3_gadget_ep_ops = { > + .enable = cdns3_gadget_ep_enable, > + .disable = cdns3_gadget_ep_disable, > + .alloc_request = cdns3_gadget_ep_alloc_request, > + .free_request = cdns3_gadget_ep_free_request, > + .queue = cdns3_gadget_ep_queue, > + .dequeue = cdns3_gadget_ep_dequeue, > + .set_halt = cdns3_gadget_ep_set_halt, > + .set_wedge = cdns3_gadget_ep_set_wedge, > +}; > + > +/** > + * cdns3_gadget_get_frame Returns number of actual ITP frame > + * @gadget: gadget object > + * > + * Returns number of actual ITP frame > + */ > +static int cdns3_gadget_get_frame(struct usb_gadget *gadget) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + > + return readl(&priv_dev->regs->usb_iptn); > +} > + > +static int cdns3_gadget_wakeup(struct usb_gadget *gadget) > +{ > + return 0; > +} > + > +static int cdns3_gadget_set_selfpowered(struct usb_gadget *gadget, > + int is_selfpowered) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + unsigned long flags; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + priv_dev->is_selfpowered = !!is_selfpowered; > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return 0; > +} > + > +static int cdns3_gadget_pullup(struct usb_gadget *gadget, int is_on) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + > + if (is_on) > + writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf); > + else > + writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf); > + > + return 0; > +} > + > +static void cdns3_gadget_config(struct cdns3_device *priv_dev) > +{ > + struct cdns3_usb_regs __iomem *regs = priv_dev->regs; > + > + cdns3_ep0_config(priv_dev); > + > + /* enable interrupts for endpoint 0 (in and out) */ > + writel(EP_IEN_EP_OUT0 | EP_IEN_EP_IN0, ®s->ep_ien); > + > + /* enable generic interrupt*/ > + writel(USB_IEN_INIT, ®s->usb_ien); > + writel(USB_CONF_CLK2OFFDS | USB_CONF_L1DS, ®s->usb_conf); > + writel(USB_CONF_DMULT, ®s->usb_conf); > + cdns3_gadget_pullup(&priv_dev->gadget, 1); > +} > + > +/** > + * cdns3_gadget_udc_start Gadget start > + * @gadget: gadget object > + * @driver: driver which operates on this gadget > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int cdns3_gadget_udc_start(struct usb_gadget *gadget, > + struct usb_gadget_driver *driver) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + unsigned long flags; > + > + spin_lock_irqsave(&priv_dev->lock, flags); > + priv_dev->gadget_driver = driver; > + cdns3_gadget_config(priv_dev); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return 0; > +} > + > +/** > + * cdns3_gadget_udc_stop Stops gadget > + * @gadget: gadget object > + * > + * Returns 0 > + */ > +static int cdns3_gadget_udc_stop(struct usb_gadget *gadget) > +{ > + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); > + struct cdns3_endpoint *priv_ep; > + u32 bEndpointAddress; > + struct usb_ep *ep; > + int ret = 0; > + > + priv_dev->gadget_driver = NULL; > + > + priv_dev->onchip_mem_allocated_size = 0; > + priv_dev->gadget.speed = USB_SPEED_UNKNOWN; > + > + list_for_each_entry(ep, &priv_dev->gadget.ep_list, ep_list) { > + priv_ep = ep_to_cdns3_ep(ep); > + bEndpointAddress = priv_ep->num | priv_ep->dir; > + cdns3_select_ep(priv_dev, bEndpointAddress); > + writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd); > + ret = cdns3_handshake(&priv_dev->regs->ep_cmd, > + EP_CMD_EPRST, 0, 100); > + cdns3_free_trb_pool(priv_ep); > + } > + > + /* disable interrupt for device */ > + writel(0, &priv_dev->regs->usb_ien); > + writel(USB_CONF_DEVDS, &priv_dev->regs->usb_conf); > + > + return ret; > +} > + > +static const struct usb_gadget_ops cdns3_gadget_ops = { > + .get_frame = cdns3_gadget_get_frame, > + .wakeup = cdns3_gadget_wakeup, > + .set_selfpowered = cdns3_gadget_set_selfpowered, > + .pullup = cdns3_gadget_pullup, > + .udc_start = cdns3_gadget_udc_start, > + .udc_stop = cdns3_gadget_udc_stop, > + .match_ep = cdns3_gadget_match_ep, > +}; > + > +static void cdns3_free_all_eps(struct cdns3_device *priv_dev) > +{ > + int i; > + > + /*ep0 OUT point to ep0 IN*/ > + priv_dev->eps[16] = NULL; > + > + cdns3_free_trb_pool(priv_dev->eps[0]); > + > + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) > + if (priv_dev->eps[i]) > + devm_kfree(priv_dev->dev, priv_dev->eps[i]); > +} > + > +/** > + * cdns3_init_eps Initializes software endpoints of gadget > + * @cdns3: extended gadget object > + * > + * Returns 0 on success, error code elsewhere > + */ > +static int cdns3_init_eps(struct cdns3_device *priv_dev) > +{ > + u32 ep_enabled_reg, iso_ep_reg; > + struct cdns3_endpoint *priv_ep; > + int ep_dir, ep_number; > + u32 ep_mask; > + int ret = 0; > + int i; > + > + /* Read it from USB_CAP3 to USB_CAP5 */ > + ep_enabled_reg = readl(&priv_dev->regs->usb_cap3); > + iso_ep_reg = readl(&priv_dev->regs->usb_cap4); > + > + dev_dbg(priv_dev->dev, "Initializing non-zero endpoints\n"); > + > + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) { > + ep_dir = i >> 4; /* i div 16 */ > + ep_number = i & 0xF; /* i % 16 */ > + ep_mask = BIT(i); > + > + if (!(ep_enabled_reg & ep_mask)) > + continue; > + > + if (ep_dir && !ep_number) { > + priv_dev->eps[i] = priv_dev->eps[0]; > + continue; > + } > + > + priv_ep = devm_kzalloc(priv_dev->dev, sizeof(*priv_ep), > + GFP_KERNEL); > + if (!priv_ep) { > + ret = -ENOMEM; > + goto err; > + } > + > + /* set parent of endpoint object */ > + priv_ep->cdns3_dev = priv_dev; > + priv_dev->eps[i] = priv_ep; > + priv_ep->num = ep_number; > + priv_ep->dir = ep_dir ? USB_DIR_IN : USB_DIR_OUT; > + > + if (!ep_number) { > + ret = cdns3_init_ep0(priv_dev, priv_ep); > + if (ret) { > + dev_err(priv_dev->dev, "Failed to init ep0\n"); > + goto err; > + } > + } else { > + snprintf(priv_ep->name, sizeof(priv_ep->name), "ep%d%s", > + ep_number, !!ep_dir ? "in" : "out"); > + priv_ep->endpoint.name = priv_ep->name; > + > + usb_ep_set_maxpacket_limit(&priv_ep->endpoint, > + CDNS3_EP_MAX_PACKET_LIMIT); > + priv_ep->endpoint.max_streams = CDNS3_EP_MAX_STREAMS; > + priv_ep->endpoint.ops = &cdns3_gadget_ep_ops; > + if (ep_dir) > + priv_ep->endpoint.caps.dir_in = 1; > + else > + priv_ep->endpoint.caps.dir_out = 1; > + > + if (iso_ep_reg & ep_mask) > + priv_ep->endpoint.caps.type_iso = 1; > + > + priv_ep->endpoint.caps.type_bulk = 1; > + priv_ep->endpoint.caps.type_int = 1; > + priv_ep->endpoint.maxburst = CDNS3_EP_BUF_SIZE - 1; > + > + list_add_tail(&priv_ep->endpoint.ep_list, > + &priv_dev->gadget.ep_list); > + } > + > + priv_ep->flags = 0; > + > + dev_info(priv_dev->dev, "Initialized %s support: %s %s\n", > + priv_ep->name, > + priv_ep->endpoint.caps.type_bulk ? "BULK, INT" : "", > + priv_ep->endpoint.caps.type_iso ? "ISO" : ""); > + > + INIT_LIST_HEAD(&priv_ep->pending_req_list); > + INIT_LIST_HEAD(&priv_ep->deferred_req_list); > + INIT_LIST_HEAD(&priv_ep->descmiss_req_list); > + } > + > + return 0; > +err: > + cdns3_free_all_eps(priv_dev); > + return -ENOMEM; > +} > + > +static void cdns3_gadget_disable(struct cdns3 *cdns) > +{ > + struct cdns3_device *priv_dev; > + > + priv_dev = cdns->gadget_dev; > + > + if (priv_dev->gadget_driver) > + priv_dev->gadget_driver->disconnect(&priv_dev->gadget); > + > + usb_gadget_disconnect(&priv_dev->gadget); > + priv_dev->gadget.speed = USB_SPEED_UNKNOWN; > +} > + > +void cdns3_gadget_exit(struct cdns3 *cdns) > +{ > + struct cdns3_device *priv_dev; > + > + priv_dev = cdns->gadget_dev; > + > + cdns3_gadget_disable(cdns); > + > + devm_free_irq(cdns->dev, cdns->irq, cdns); > + > + pm_runtime_mark_last_busy(cdns->dev); > + pm_runtime_put_autosuspend(cdns->dev); > + > + usb_del_gadget_udc(&priv_dev->gadget); > + > + cdns3_free_all_eps(priv_dev); > + > + dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf, > + priv_dev->setup_dma); > + > + kfree(priv_dev->zlp_buf); > + kfree(priv_dev); > + cdns->gadget_dev = NULL; > +} > + > +static int cdns3_gadget_start(struct cdns3 *cdns) > +{ > + struct cdns3_device *priv_dev; > + u32 max_speed; > + int ret; > + > + priv_dev = kzalloc(sizeof(*priv_dev), GFP_KERNEL); > + if (!priv_dev) > + return -ENOMEM; > + > + cdns->gadget_dev = priv_dev; > + priv_dev->sysdev = cdns->dev; > + priv_dev->dev = cdns->dev; > + priv_dev->regs = cdns->dev_regs; > + > + max_speed = usb_get_maximum_speed(cdns->dev); > + > + /* Check the maximum_speed parameter */ > + switch (max_speed) { > + case USB_SPEED_FULL: > + case USB_SPEED_HIGH: > + case USB_SPEED_SUPER: > + break; > + default: > + dev_err(cdns->dev, "invalid maximum_speed parameter %d\n", > + max_speed); > + /* fall through */ > + case USB_SPEED_UNKNOWN: > + /* default to superspeed */ > + max_speed = USB_SPEED_SUPER; > + break; > + } > + > + /* fill gadget fields */ > + priv_dev->gadget.max_speed = max_speed; > + priv_dev->gadget.speed = USB_SPEED_UNKNOWN; > + priv_dev->gadget.ops = &cdns3_gadget_ops; > + priv_dev->gadget.name = "usb-ss-gadget"; > + priv_dev->gadget.sg_supported = 1; > + > + spin_lock_init(&priv_dev->lock); > + INIT_WORK(&priv_dev->pending_status_wq, > + cdns3_pending_setup_status_handler); > + > + /* initialize endpoint container */ > + INIT_LIST_HEAD(&priv_dev->gadget.ep_list); > + > + ret = cdns3_init_eps(priv_dev); > + if (ret) { > + dev_err(priv_dev->dev, "Failed to create endpoints\n"); > + goto err1; > + } > + > + /* allocate memory for setup packet buffer */ > + priv_dev->setup_buf = dma_alloc_coherent(priv_dev->sysdev, 8, > + &priv_dev->setup_dma, GFP_DMA); > + if (!priv_dev->setup_buf) { > + dev_err(priv_dev->dev, "Failed to allocate memory for SETUP buffer\n"); > + ret = -ENOMEM; > + goto err2; > + } > + > + priv_dev->dev_ver = readl(&priv_dev->regs->usb_cap6); > + dev_dbg(priv_dev->dev, "Device Controller version: %08x\n", > + readl(&priv_dev->regs->usb_cap6)); > + dev_dbg(priv_dev->dev, "USB Capabilities:: %08x\n", > + readl(&priv_dev->regs->usb_cap1)); > + dev_dbg(priv_dev->dev, "On-Chip memory cnfiguration: %08x\n", > + readl(&priv_dev->regs->usb_cap2)); > + > + priv_dev->zlp_buf = kzalloc(CDNS3_EP_ZLP_BUF_SIZE, GFP_KERNEL); > + if (!priv_dev->zlp_buf) { > + ret = -ENOMEM; > + goto err3; > + } > + > + /* add USB gadget device */ > + ret = usb_add_gadget_udc(priv_dev->dev, &priv_dev->gadget); > + if (ret < 0) { > + dev_err(priv_dev->dev, > + "Failed to register USB device controller\n"); > + goto err4; > + } > + > + return 0; > +err4: > + kfree(priv_dev->zlp_buf); > +err3: > + dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf, > + priv_dev->setup_dma); > +err2: > + cdns3_free_all_eps(priv_dev); > +err1: > + cdns->gadget_dev = NULL; > + return ret; > +} > + > +static int __cdns3_gadget_init(struct cdns3 *cdns) > +{ > + struct cdns3_device *priv_dev; > + unsigned long flags; > + int ret = 0; > + > + ret = cdns3_gadget_start(cdns); > + if (ret) > + return ret; > + > + priv_dev = cdns->gadget_dev; > + ret = devm_request_threaded_irq(cdns->dev, cdns->irq, > + cdns3_device_irq_handler, > + cdns3_device_thread_irq_handler, > + IRQF_SHARED, dev_name(cdns->dev), cdns); > + if (ret) > + goto err0; > + > + pm_runtime_get_sync(cdns->dev); > + spin_lock_irqsave(&priv_dev->lock, flags); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return 0; > +err0: > + cdns3_gadget_exit(cdns); > + return ret; > +} > + > +static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup) > +{ > + cdns3_gadget_disable(cdns); > + return 0; > +} > + > +static int cdns3_gadget_resume(struct cdns3 *cdns, bool hibernated) > +{ > + struct cdns3_device *priv_dev; > + unsigned long flags; > + > + priv_dev = cdns->gadget_dev; > + spin_lock_irqsave(&priv_dev->lock, flags); > + > + if (!priv_dev->gadget_driver) { > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return 0; > + } > + > + cdns3_gadget_config(priv_dev); > + spin_unlock_irqrestore(&priv_dev->lock, flags); > + return 0; > +} > + > +/** > + * cdns3_gadget_init - initialize device structure > + * > + * cdns: cdns3 instance > + * > + * This function initializes the gadget. > + */ > +int cdns3_gadget_init(struct cdns3 *cdns) > +{ > + struct cdns3_role_driver *rdrv; > + > + rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); > + if (!rdrv) > + return -ENOMEM; > + > + rdrv->start = __cdns3_gadget_init; > + rdrv->stop = cdns3_gadget_exit; > + rdrv->suspend = cdns3_gadget_suspend; > + rdrv->resume = cdns3_gadget_resume; > + rdrv->state = CDNS3_ROLE_STATE_INACTIVE; > + rdrv->name = "gadget"; > + cdns->roles[CDNS3_ROLE_GADGET] = rdrv; > + > + return 0; > +} > diff --git a/drivers/usb/cdns3/gadget.h b/drivers/usb/cdns3/gadget.h > new file mode 100644 > index 000000000000..41cec7f085ad > --- /dev/null > +++ b/drivers/usb/cdns3/gadget.h > @@ -0,0 +1,1206 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * USBSS device controller driver header file > + * > + * Copyright (C) 2018 Cadence. > + * Copyright (C) 2017-2018 NXP > + * > + * Author: Pawel Laszczak > + * Pawel Jez > + * Peter Chen > + */ > +#ifndef __LINUX_CDNS3_GADGET > +#define __LINUX_CDNS3_GADGET > +#include > + > +/* > + * USBSS-DEV register interface. > + * This corresponds to the USBSS Device Controller Interface > + */ > + > +/** > + * struct cdns3_usb_regs - device controller registers. > + * @usb_conf: Global Configuration Register. > + * @usb_sts: Global Status Register. > + * @usb_cmd: Global Command Register. > + * @usb_iptn: ITP/SOF number Register. > + * @usb_lpm: Global Command Register. > + * @usb_ien: USB Interrupt Enable Register. > + * @usb_ists: USB Interrupt Status Register. > + * @ep_sel: Endpoint Select Register. > + * @ep_traddr: Endpoint Transfer Ring Address Register. > + * @ep_cfg: Endpoint Configuration Register. > + * @ep_cmd: Endpoint Command Register. > + * @ep_sts: Endpoint Status Register. > + * @ep_sts_sid: Endpoint Status Register. > + * @ep_sts_en: Endpoint Status Register Enable. > + * @drbl: Doorbell Register. > + * @ep_ien: EP Interrupt Enable Register. > + * @ep_ists: EP Interrupt Status Register. > + * @usb_pwr: Global Power Configuration Register. > + * @usb_conf2: Global Configuration Register 2. > + * @usb_cap1: Capability Register 1. > + * @usb_cap2: Capability Register 2. > + * @usb_cap3: Capability Register 3. > + * @usb_cap4: Capability Register 4. > + * @usb_cap5: Capability Register 5. > + * @usb_cap6: Capability Register 6. > + * @usb_cpkt1: Custom Packet Register 1. > + * @usb_cpkt2: Custom Packet Register 2. > + * @usb_cpkt3: Custom Packet Register 3. > + * @reserved1: Reserved. > + * @cfg_regs: Configuration registers. > + * @reserved2: Reserved. > + * @dma_axi_ctrl: AXI Control register. > + * @dma_axi_id: AXI ID register. > + * @dma_axi_cap: AXI Capability register. > + * @dma_axi_ctrl0: AXI Control 0 register. > + * @dma_axi_ctrl1: AXI Control 1 register. > + */ > +struct cdns3_usb_regs { > + __le32 usb_conf; > + __le32 usb_sts; > + __le32 usb_cmd; > + __le32 usb_iptn; > + __le32 usb_lpm; > + __le32 usb_ien; > + __le32 usb_ists; > + __le32 ep_sel; > + __le32 ep_traddr; > + __le32 ep_cfg; > + __le32 ep_cmd; > + __le32 ep_sts; > + __le32 ep_sts_sid; > + __le32 ep_sts_en; > + __le32 drbl; > + __le32 ep_ien; > + __le32 ep_ists; > + __le32 usb_pwr; > + __le32 usb_conf2; > + __le32 usb_cap1; > + __le32 usb_cap2; > + __le32 usb_cap3; > + __le32 usb_cap4; > + __le32 usb_cap5; > + __le32 usb_cap6; > + __le32 usb_cpkt1; > + __le32 usb_cpkt2; > + __le32 usb_cpkt3; > + __le32 reserved1[36]; > + __le32 cfg_reg1; > + __le32 dbg_link1; > + __le32 dbg_link2; > + __le32 cfg_regs[74]; > + __le32 reserved2[34]; > + __le32 dma_axi_ctrl; > + __le32 dma_axi_id; > + __le32 dma_axi_cap; > + __le32 dma_axi_ctrl0; > + __le32 dma_axi_ctrl1; > +}; > + > +/* USB_CONF - bitmasks */ > +/* Reset USB device configuration. */ > +#define USB_CONF_CFGRST BIT(0) > +/* Set Configuration. */ > +#define USB_CONF_CFGSET BIT(1) > +/* Disconnect USB device in SuperSpeed. */ > +#define USB_CONF_USB3DIS BIT(3) > +/* Disconnect USB device in HS/FS */ > +#define USB_CONF_USB2DIS BIT(4) > +/* Little Endian access - default */ > +#define USB_CONF_LENDIAN BIT(5) > +/* > + * Big Endian access. Driver assume that byte order for > + * SFRs access always is as Little Endian so this bit > + * is not used. > + */ > +#define USB_CONF_BENDIAN BIT(6) > +/* Device software reset. */ > +#define USB_CONF_SWRST BIT(7) > +/* Singular DMA transfer mode. */ > +#define USB_CONF_DSING BIT(8) > +/* Multiple DMA transfers mode. */ > +#define USB_CONF_DMULT BIT(9) > +/* DMA clock turn-off enable. */ > +#define USB_CONF_DMAOFFEN BIT(10) > +/* DMA clock turn-off disable. */ > +#define USB_CONF_DMAOFFDS BIT(11) > +/* Clear Force Full Speed. */ > +#define USB_CONF_CFORCE_FS BIT(12) > +/* Set Force Full Speed. */ > +#define USB_CONF_SFORCE_FS BIT(13) > +/* Device enable. */ > +#define USB_CONF_DEVEN BIT(14) > +/* Device disable. */ > +#define USB_CONF_DEVDS BIT(15) > +/* L1 LPM state entry enable (used in HS/FS mode). */ > +#define USB_CONF_L1EN BIT(16) > +/* L1 LPM state entry disable (used in HS/FS mode). */ > +#define USB_CONF_L1DS BIT(17) > +/* USB 2.0 clock gate disable. */ > +#define USB_CONF_CLK2OFFEN BIT(18) > +/* USB 2.0 clock gate enable. */ > +#define USB_CONF_CLK2OFFDS BIT(19) > +/* L0 LPM state entry request (used in HS/FS mode). */ > +#define USB_CONF_LGO_L0 BIT(20) > +/* USB 3.0 clock gate disable. */ > +#define USB_CONF_CLK3OFFEN BIT(21) > +/* USB 3.0 clock gate enable. */ > +#define USB_CONF_CLK3OFFDS BIT(22) > +/* Bit 23 is reserved*/ > +/* U1 state entry enable (used in SS mode). */ > +#define USB_CONF_U1EN BIT(24) > +/* U1 state entry disable (used in SS mode). */ > +#define USB_CONF_U1DS BIT(25) > +/* U2 state entry enable (used in SS mode). */ > +#define USB_CONF_U2EN BIT(26) > +/* U2 state entry disable (used in SS mode). */ > +#define USB_CONF_U2DS BIT(27) > +/* U0 state entry request (used in SS mode). */ > +#define USB_CONF_LGO_U0 BIT(28) > +/* U1 state entry request (used in SS mode). */ > +#define USB_CONF_LGO_U1 BIT(29) > +/* U2 state entry request (used in SS mode). */ > +#define USB_CONF_LGO_U2 BIT(30) > +/* SS.Inactive state entry request (used in SS mode) */ > +#define USB_CONF_LGO_SSINACT BIT(31) > + > +/* USB_STS - bitmasks */ > +/* > + * Configuration status. > + * 1 - device is in the configured state. > + * 0 - device is not configured. > + */ > +#define USB_STS_CFGSTS_MASK BIT(0) > +#define USB_STS_CFGSTS(p) ((p) & USB_STS_CFGSTS_MASK) > +/* > + * On-chip memory overflow. > + * 0 - On-chip memory status OK. > + * 1 - On-chip memory overflow. > + */ > +#define USB_STS_OV_MASK BIT(1) > +#define USB_STS_OV(p) ((p) & USB_STS_OV_MASK) > +/* > + * SuperSpeed connection status. > + * 0 - USB in SuperSpeed mode disconnected. > + * 1 - USB in SuperSpeed mode connected. > + */ > +#define USB_STS_USB3CONS_MASK BIT(2) > +#define USB_STS_USB3CONS(p) ((p) & USB_STS_USB3CONS_MASK) > +/* > + * DMA transfer configuration status. > + * 0 - single request. > + * 1 - multiple TRB chain > + */ > +#define USB_STS_DTRANS_MASK BIT(3) > +#define USB_STS_DTRANS(p) ((p) & USB_STS_DTRANS_MASK) > +/* > + * Device speed. > + * 0 - Undefined (value after reset). > + * 1 - Low speed > + * 2 - Full speed > + * 3 - High speed > + * 4 - Super speed > + */ > +#define USB_STS_USBSPEED_MASK GENMASK(6, 4) > +#define USB_STS_USBSPEED(p) (((p) & USB_STS_USBSPEED_MASK) >> 4) > +#define USB_STS_LS (0x1 << 4) > +#define USB_STS_FS (0x2 << 4) > +#define USB_STS_HS (0x3 << 4) > +#define USB_STS_SS (0x4 << 4) > +#define DEV_UNDEFSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == (0x0 << 4)) > +#define DEV_LOWSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_LS) > +#define DEV_FULLSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_FS) > +#define DEV_HIGHSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_HS) > +#define DEV_SUPERSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_SS) > +/* > + * Endianness for SFR access. > + * 0 - Little Endian order (default after hardware reset). > + * 1 - Big Endian order > + */ > +#define USB_STS_ENDIAN_MASK BIT(7) > +#define USB_STS_ENDIAN(p) ((p) & USB_STS_ENDIAN_MASK) > +/* > + * HS/FS clock turn-off status. > + * 0 - hsfs clock is always on. > + * 1 - hsfs clock turn-off in L2 (HS/FS mode) is enabled > + * (default after hardware reset). > + */ > +#define USB_STS_CLK2OFF_MASK BIT(8) > +#define USB_STS_CLK2OFF(p) ((p) & USB_STS_CLK2OFF_MASK) > +/* > + * PCLK clock turn-off status. > + * 0 - pclk clock is always on. > + * 1 - pclk clock turn-off in U3 (SS mode) is enabled > + * (default after hardware reset). > + */ > +#define USB_STS_CLK3OFF_MASK BIT(9) > +#define USB_STS_CLK3OFF(p) ((p) & USB_STS_CLK3OFF_MASK) > +/* > + * Controller in reset state. > + * 0 - Internal reset is active. > + * 1 - Internal reset is not active and controller is fully operational. > + */ > +#define USB_STS_IN_RST_MASK BIT(10) > +#define USB_STS_IN_RST(p) ((p) & USB_STS_IN_RST_MASK) > +/* > + * Device enable Status. > + * 0 - USB device is disabled (VBUS input is disconnected from internal logic). > + * 1 - USB device is enabled (VBUS input is connected to the internal logic). > + */ > +#define USB_STS_DEVS_MASK BIT(14) > +#define USB_STS_DEVS(p) ((p) & USB_STS_DEVS_MASK) > +/* > + * DAddress statuss. > + * 0 - USB device is default state. > + * 1 - USB device is at least in address state. > + */ > +#define USB_STS_ADDRESSED_MASK BIT(15) > +#define USB_STS_ADDRESSED(p) ((p) & USB_STS_ADDRESSED_MASK) > +/* > + * L1 LPM state enable status (used in HS/FS mode). > + * 0 - Entering to L1 LPM state disabled. > + * 1 - Entering to L1 LPM state enabled. > + */ > +#define USB_STS_L1ENS_MASK BIT(16) > +#define USB_STS_L1ENS(p) ((p) & USB_STS_L1ENS_MASK) > +/* > + * Internal VBUS connection status (used both in HS/FS and SS mode). > + * 0 - internal VBUS is not detected. > + * 1 - internal VBUS is detected. > + */ > +#define USB_STS_VBUSS_MASK BIT(17) > +#define USB_STS_VBUSS(p) ((p) & USB_STS_VBUSS_MASK) > +/* > + * HS/FS LPM state (used in FS/HS mode). > + * 0 - L0 State > + * 1 - L1 State > + * 2 - L2 State > + * 3 - L3 State > + */ > +#define USB_STS_LPMST_MASK GENMASK(19, 18) > +#define DEV_L0_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x0 << 18)) > +#define DEV_L1_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x1 << 18)) > +#define DEV_L2_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x2 << 18)) > +#define DEV_L3_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x3 << 18)) > +/* > + * Disable HS status (used in FS/HS mode). > + * 0 - the disconnect bit for HS/FS mode is set . > + * 1 - the disconnect bit for HS/FS mode is not set. > + */ > +#define USB_STS_USB2CONS_MASK BIT(20) > +#define USB_STS_USB2CONS(p) ((p) & USB_STS_USB2CONS_MASK) > +/* > + * HS/FS mode connection status (used in FS/HS mode). > + * 0 - High Speed operations in USB2.0 (FS/HS) mode not disabled. > + * 1 - High Speed operations in USB2.0 (FS/HS). > + */ > +#define USB_STS_DISABLE_HS_MASK BIT(21) > +#define USB_STS_DISABLE_HS(p) ((p) & USB_STS_DISABLE_HS_MASK) > +/* > + * U1 state enable status (used in SS mode). > + * 0 - Entering to U1 state disabled. > + * 1 - Entering to U1 state enabled. > + */ > +#define USB_STS_U1ENS_MASK BIT(24) > +#define USB_STS_U1ENS(p) ((p) & USB_STS_U1ENS_MASK) > +/* > + * U2 state enable status (used in SS mode). > + * 0 - Entering to U2 state disabled. > + * 1 - Entering to U2 state enabled. > + */ > +#define USB_STS_U2ENS_MASK BIT(25) > +#define USB_STS_U2ENS(p) ((p) & USB_STS_U2ENS_MASK) > +/* > + * SuperSpeed Link LTSSM state. This field reflects USBSS-DEV current > + * SuperSpeed link state > + */ > +#define USB_STS_LST_MASK GENMASK(29, 26) > +#define DEV_LST_U0 (((p) & USB_STS_LST_MASK) == (0x0 << 26)) > +#define DEV_LST_U1 (((p) & USB_STS_LST_MASK) == (0x1 << 26)) > +#define DEV_LST_U2 (((p) & USB_STS_LST_MASK) == (0x2 << 26)) > +#define DEV_LST_U3 (((p) & USB_STS_LST_MASK) == (0x3 << 26)) > +#define DEV_LST_DISABLED (((p) & USB_STS_LST_MASK) == (0x4 << 26)) > +#define DEV_LST_RXDETECT (((p) & USB_STS_LST_MASK) == (0x5 << 26)) > +#define DEV_LST_INACTIVE (((p) & USB_STS_LST_MASK) == (0x6 << 26)) > +#define DEV_LST_POLLING (((p) & USB_STS_LST_MASK) == (0x7 << 26)) > +#define DEV_LST_RECOVERY (((p) & USB_STS_LST_MASK) == (0x8 << 26)) > +#define DEV_LST_HOT_RESET (((p) & USB_STS_LST_MASK) == (0x9 << 26)) > +#define DEV_LST_COMP_MODE (((p) & USB_STS_LST_MASK) == (0xa << 26)) > +#define DEV_LST_LB_STATE (((p) & USB_STS_LST_MASK) == (0xb << 26)) > +/* > + * DMA clock turn-off status. > + * 0 - DMA clock is always on (default after hardware reset). > + * 1 - DMA clock turn-off in U1, U2 and U3 (SS mode) is enabled. > + */ > +#define USB_STS_DMAOFF_MASK BIT(30) > +#define USB_STS_DMAOFF(p) ((p) & USB_STS_DMAOFF_MASK) > +/* > + * SFR Endian statuss. > + * 0 - Little Endian order (default after hardware reset). > + * 1 - Big Endian order. > + */ > +#define USB_STS_ENDIAN2_MASK BIT(31) > +#define USB_STS_ENDIAN2(p) ((p) & USB_STS_ENDIAN2_MASK) > + > +/* USB_CMD - bitmasks */ > +/* Set Function Address */ > +#define USB_CMD_SET_ADDR BIT(0) > +/* > + * Function Address This field is saved to the device only when the field > + * SET_ADDR is set '1 ' during write to USB_CMD register. > + * Software is responsible for entering the address of the device during > + * SET_ADDRESS request service. This field should be set immediately after > + * the SETUP packet is decoded, and prior to confirmation of the status phase > + */ > +#define USB_CMD_FADDR_MASK GENMASK(7, 1) > +#define USB_CMD_FADDR(p) (((p) << 1) & USB_CMD_FADDR_MASK) > +/* Send Function Wake Device Notification TP (used only in SS mode). */ > +#define USB_CMD_SDNFW BIT(8) > +/* Set Test Mode (used only in HS/FS mode). */ > +#define USB_CMD_STMODE BIT(9) > +/* Test mode selector (used only in HS/FS mode) */ > +#define USB_STS_TMODE_SEL_MASK GENMASK(11, 10) > +#define USB_STS_TMODE_SEL(p) (((p) << 10) & USB_STS_TMODE_SEL_MASK) > +/* > + * Send Latency Tolerance Message Device Notification TP (used only > + * in SS mode). > + */ > +#define USB_CMD_SDNLTM BIT(12) > +/* Send Custom Transaction Packet (used only in SS mode) */ > +#define USB_CMD_SPKT BIT(13) > +/*Device Notification 'Function Wake' - Interface value (only in SS mode. */ > +#define USB_CMD_DNFW_INT_MASK GENMASK(23, 16) > +#define USB_STS_DNFW_INT(p) (((p) << 16) & USB_CMD_DNFW_INT_MASK) > +/* > + * Device Notification 'Latency Tolerance Message' -373 BELT value [7:0] > + * (used only in SS mode). > + */ > +#define USB_CMD_DNLTM_BELT_MASK GENMASK(27, 16) > +#define USB_STS_DNLTM_BELT(p) (((p) << 16) & USB_CMD_DNLTM_BELT_MASK) > + > +/* USB_ITPN - bitmasks */ > +/* > + * ITP(SS) / SOF (HS/FS) number > + * In SS mode this field represent number of last ITP received from host. > + * In HS/FS mode this field represent number of last SOF received from host. > + */ > +#define USB_ITPN_MASK GENMASK(13, 0) > +#define USB_ITPN(p) ((p) & USB_ITPN_MASK) > + > +/* USB_LPM - bitmasks */ > +/* Host Initiated Resume Duration. */ > +#define USB_LPM_HIRD_MASK GENMASK(3, 0) > +#define USB_LPM_HIRD(p) ((p) & USB_LPM_HIRD_MASK) > +/* Remote Wakeup Enable (bRemoteWake). */ > +#define USB_LPM_BRW BIT(4) > + > +/* USB_IEN - bitmasks */ > +/* SS connection interrupt enable */ > +#define USB_IEN_CONIEN BIT(0) > +/* SS disconnection interrupt enable. */ > +#define USB_IEN_DISIEN BIT(1) > +/* USB SS warm reset interrupt enable. */ > +#define USB_IEN_UWRESIEN BIT(2) > +/* USB SS hot reset interrupt enable */ > +#define USB_IEN_UHRESIEN BIT(3) > +/* SS link U3 state enter interrupt enable (suspend).*/ > +#define USB_IEN_U3ENTIEN BIT(4) > +/* SS link U3 state exit interrupt enable (wakeup). */ > +#define USB_IEN_U3EXTIEN BIT(5) > +/* SS link U2 state enter interrupt enable.*/ > +#define USB_IEN_U2ENTIEN BIT(6) > +/* SS link U2 state exit interrupt enable.*/ > +#define USB_IEN_U2EXTIEN BIT(7) > +/* SS link U1 state enter interrupt enable.*/ > +#define USB_IEN_U1ENTIEN BIT(8) > +/* SS link U1 state exit interrupt enable.*/ > +#define USB_IEN_U1EXTIEN BIT(9) > +/* ITP/SOF packet detected interrupt enable.*/ > +#define USB_IEN_ITPIEN BIT(10) > +/* Wakeup interrupt enable.*/ > +#define USB_IEN_WAKEIEN BIT(11) > +/* Send Custom Packet interrupt enable.*/ > +#define USB_IEN_SPKTIEN BIT(12) > +/* HS/FS mode connection interrupt enable.*/ > +#define USB_IEN_CON2IEN BIT(16) > +/* HS/FS mode disconnection interrupt enable.*/ > +#define USB_IEN_DIS2IEN BIT(17) > +/* USB reset (HS/FS mode) interrupt enable.*/ > +#define USB_IEN_U2RESIEN BIT(18) > +/* LPM L2 state enter interrupt enable.*/ > +#define USB_IEN_L2ENTIEN BIT(20) > +/* LPM L2 state exit interrupt enable.*/ > +#define USB_IEN_L2EXTIEN BIT(21) > +/* LPM L1 state enter interrupt enable.*/ > +#define USB_IEN_L1ENTIEN BIT(24) > +/* LPM L1 state exit interrupt enable.*/ > +#define USB_IEN_L1EXTIEN BIT(25) > +/* Configuration reset interrupt enable.*/ > +#define USB_IEN_CFGRESIEN BIT(26) > +/* Start of the USB SS warm reset interrupt enable.*/ > +#define USB_IEN_UWRESSIEN BIT(28) > +/* End of the USB SS warm reset interrupt enable.*/ > +#define USB_IEN_UWRESEIEN BIT(29) > + > +#define USB_IEN_INIT (USB_IEN_U2RESIEN | USB_ISTS_DIS2I | USB_IEN_CON2IEN \ > + | USB_IEN_UHRESIEN | USB_IEN_UWRESIEN | USB_IEN_DISIEN \ > + | USB_IEN_CONIEN | USB_IEN_U3EXTIEN | USB_IEN_L2ENTIEN \ > + | USB_IEN_L2EXTIEN) > + > +/* USB_ISTS - bitmasks */ > +/* SS Connection detected. */ > +#define USB_ISTS_CONI BIT(0) > +/* SS Disconnection detected. */ > +#define USB_ISTS_DISI BIT(1) > +/* UUSB warm reset detectede. */ > +#define USB_ISTS_UWRESI BIT(2) > +/* USB hot reset detected. */ > +#define USB_ISTS_UHRESI BIT(3) > +/* U3 link state enter detected (suspend).*/ > +#define USB_ISTS_U3ENTI BIT(4) > +/* U3 link state exit detected (wakeup). */ > +#define USB_ISTS_U3EXTI BIT(5) > +/* U2 link state enter detected.*/ > +#define USB_ISTS_U2ENTI BIT(6) > +/* U2 link state exit detected.*/ > +#define USB_ISTS_U2EXTI BIT(7) > +/* U1 link state enter detected.*/ > +#define USB_ISTS_U1ENTI BIT(8) > +/* U1 link state exit detected.*/ > +#define USB_ISTS_U1EXTI BIT(9) > +/* ITP/SOF packet detected.*/ > +#define USB_ISTS_ITPI BIT(10) > +/* Wakeup detected.*/ > +#define USB_ISTS_WAKEI BIT(11) > +/* Send Custom Packet detected.*/ > +#define USB_ISTS_SPKTI BIT(12) > +/* HS/FS mode connection detected.*/ > +#define USB_ISTS_CON2I BIT(16) > +/* HS/FS mode disconnection detected.*/ > +#define USB_ISTS_DIS2I BIT(17) > +/* USB reset (HS/FS mode) detected.*/ > +#define USB_ISTS_U2RESI BIT(18) > +/* LPM L2 state enter detected.*/ > +#define USB_ISTS_L2ENTI BIT(20) > +/* LPM L2 state exit detected.*/ > +#define USB_ISTS_L2EXTI BIT(21) > +/* LPM L1 state enter detected.*/ > +#define USB_ISTS_L1ENTI BIT(24) > +/* LPM L1 state exit detected.*/ > +#define USB_ISTS_L1EXTI BIT(25) > +/* USB configuration reset detected.*/ > +#define USB_ISTS_CFGRESI BIT(26) > +/* Start of the USB warm reset detected.*/ > +#define USB_ISTS_UWRESSI BIT(28) > +/* End of the USB warm reset detected.*/ > +#define USB_ISTS_UWRESEI BIT(29) > + > +/* USB_SEL - bitmasks */ > +#define EP_SEL_EPNO_MASK GENMASK(3, 0) > +/* Endpoint number. */ > +#define EP_SEL_EPNO(p) ((p) & EP_SEL_EPNO_MASK) > +/* Endpoint direction bit - 0 - OUT, 1 - IN. */ > +#define EP_SEL_DIR BIT(7) > + > +#define select_ep_in(nr) (EP_SEL_EPNO(p) | EP_SEL_DIR) > +#define select_ep_out (EP_SEL_EPNO(p)) > + > +/* EP_TRADDR - bitmasks */ > +/* Transfer Ring address. */ > +#define EP_TRADDR_TRADDR(p) ((p)) > + > +/* EP_CFG - bitmasks */ > +/* Endpoint enable */ > +#define EP_CFG_ENABLE BIT(0) > +/* > + * Endpoint type. > + * 1 - isochronous > + * 2 - bulk > + * 3 - interrupt > + */ > +#define EP_CFG_EPTYPE_MASK GENMASK(2, 1) > +#define EP_CFG_EPTYPE(p) (((p) << 1) & EP_CFG_EPTYPE_MASK) > +/* Stream support enable (only in SS mode). */ > +#define EP_CFG_STREAM_EN BIT(3) > +/* TDL check (only in SS mode for BULK EP). */ > +#define EP_CFG_TDL_CHK BIT(4) > +/* SID check (only in SS mode for BULK OUT EP). */ > +#define EP_CFG_SID_CHK BIT(5) > +/* DMA transfer endianness. */ > +#define EP_CFG_EPENDIAN BIT(7) > +/* Max burst size (used only in SS mode). */ > +#define EP_CFG_MAXBURST_MASK GENMASK(11, 8) > +#define EP_CFG_MAXBURST(p) (((p) << 8) & EP_CFG_MAXBURST_MASK) > +/* ISO max burst. */ > +#define EP_CFG_MULT_MASK GENMASK(15, 14) > +#define EP_CFG_MULT(p) (((p) << 14) & EP_CFG_MULT) > +/* ISO max burst. */ > +#define EP_CFG_MAXPKTSIZE_MASK GENMASK(26, 16) > +#define EP_CFG_MAXPKTSIZE(p) (((p) << 16) & EP_CFG_MAXPKTSIZE_MASK) > +/* Max number of buffered packets. */ > +#define EP_CFG_BUFFERING_MASK GENMASK(31, 27) > +#define EP_CFG_BUFFERING(p) (((p) << 27) & EP_CFG_BUFFERING_MASK) > + > +/* EP_CMD - bitmasks */ > +/* Endpoint reset. */ > +#define EP_CMD_EPRST BIT(0) > +/* Endpoint STALL set. */ > +#define EP_CMD_SSTALL BIT(1) > +/* Endpoint STALL clear. */ > +#define EP_CMD_CSTALL BIT(2) > +/* Send ERDY TP. */ > +#define EP_CMD_ERDY BIT(3) > +/* Request complete. */ > +#define EP_CMD_REQ_CMPL BIT(5) > +/* Transfer descriptor ready. */ > +#define EP_CMD_DRDY BIT(6) > +/* Data flush. */ > +#define EP_CMD_DFLUSH BIT(7) > +/* > + * Transfer Descriptor Length write (used only for Bulk Stream capable > + * endpoints in SS mode). > + */ > +#define EP_CMD_STDL BIT(8) > +/* Transfer Descriptor Length (used only in SS mode for bulk endpoints). */ > +#define EP_CMD_TDL_MASK GENMASK(15, 9) > +#define EP_CMD_TDL(p) (((p) << 9) & EP_CMD_TDL_MASK) > +/* ERDY Stream ID value (used in SS mode). */ > +#define EP_CMD_ERDY_SID_MASK GENMASK(31, 16) > +#define EP_CMD_ERDY_SID(p) (((p) << 16) & EP_CMD_SID_MASK) > + > +/* EP_STS - bitmasks */ > +/* Setup transfer complete. */ > +#define EP_STS_SETUP BIT(0) > +/* Endpoint STALL status. */ > +#define EP_STS_STALL(p) ((p) & BIT(1)) > +/* Interrupt On Complete. */ > +#define EP_STS_IOC BIT(2) > +/* Interrupt on Short Packet. */ > +#define EP_STS_ISP BIT(3) > +/* Transfer descriptor missing. */ > +#define EP_STS_DESCMIS BIT(4) > +/* Stream Rejected (used only in SS mode) */ > +#define EP_STS_STREAMR BIT(5) > +/* EXIT from MOVE DATA State (used only for stream transfers in SS mode). */ > +#define EP_STS_MD_EXIT BIT(6) > +/* TRB error. */ > +#define EP_STS_TRBERR BIT(7) > +/* Not ready (used only in SS mode). */ > +#define EP_STS_NRDY BIT(8) > +/* DMA busy. */ > +#define EP_STS_DBUSY(p) ((p) & BIT(9)) > +/* Endpoint Buffer Empty */ > +#define EP_STS_BUFFEMPTY(p) ((p) & BIT(10)) > +/* Current Cycle Status */ > +#define EP_STS_CCS(p) ((p) & BIT(11)) > +/* Prime (used only in SS mode. */ > +#define EP_STS_PRIME BIT(12) > +/* Stream error (used only in SS mode). */ > +#define EP_STS_SIDERR BIT(13) > +/* OUT size mismatch. */ > +#define EP_STS_OUTSMM BIT(14) > +/* ISO transmission error. */ > +#define EP_STS_ISOERR BIT(15) > +/* Host Packet Pending (only for SS mode). */ > +#define EP_STS_HOSTPP(p) ((p) & BIT(16)) > +/* Stream Protocol State Machine State (only for Bulk stream endpoints). */ > +#define EP_STS_SPSMST_MASK GENMASK(18, 17) > +#define EP_STS_SPSMST_DISABLED(p) (((p) & EP_STS_SPSMST_MASK) >> 17) > +#define EP_STS_SPSMST_IDLE(p) (((p) & EP_STS_SPSMST_MASK) >> 17) > +#define EP_STS_SPSMST_START_STREAM(p) (((p) & EP_STS_SPSMST_MASK) >> 17) > +#define EP_STS_SPSMST_MOVE_DATA(p) (((p) & EP_STS_SPSMST_MASK) >> 17) > +/* Interrupt On Transfer complete. */ > +#define EP_STS_IOT BIT(19) > +/* OUT queue endpoint number. */ > +#define EP_STS_OUTQ_NO_MASK GENMASK(27, 24) > +#define EP_STS_OUTQ_NO(p) (((p) & EP_STS_OUTQ_NO_MASK) >> 24) > +/* OUT queue valid flag. */ > +#define EP_STS_OUTQ_VAL_MASK BIT(28) > +#define EP_STS_OUTQ_VAL(p) ((p) & EP_STS_OUTQ_VAL_MASK) > +/* SETUP WAIT. */ > +#define EP_STS_STPWAIT BIT(31) > + > +/* EP_STS_SID - bitmasks */ > +/* Stream ID (used only in SS mode). */ > +#define EP_STS_SID_MASK GENMASK(15, 0) > +#define EP_STS_SID(p) ((p) & EP_STS_SID_MASK) > + > +/* EP_STS_EN - bitmasks */ > +/* SETUP interrupt enable. */ > +#define EP_STS_EN_SETUPEN BIT(0) > +/* OUT transfer missing descriptor enable. */ > +#define EP_STS_EN_DESCMISEN BIT(4) > +/* Stream Rejected enable. */ > +#define EP_STS_EN_STREAMREN BIT(5) > +/* Move Data Exit enable.*/ > +#define EP_STS_EN_MD_EXITEN BIT(6) > +/* TRB enable. */ > +#define EP_STS_EN_TRBERREN BIT(7) > +/* NRDY enable. */ > +#define EP_STS_EN_NRDYEN BIT(8) > +/* Prime enable. */ > +#define EP_STS_EN_PRIMEEEN BIT(12) > +/* Stream error enable. */ > +#define EP_STS_EN_SIDERREN BIT(13) > +/* OUT size mismatch enable. */ > +#define EP_STS_EN_OUTSMMEN BIT(14) > +/* ISO transmission error enable. */ > +#define EP_STS_EN_ISOERREN BIT(15) > +/* Interrupt on Transmission complete enable. */ > +#define EP_STS_EN_IOTEN BIT(19) > +/* Setup Wait interrupt enable. */ > +#define EP_STS_EN_STPWAITEN BIT(31) > + > +/* DRBL- bitmasks */ > +#define DB_VALUE_BY_INDEX(index) (1 << (index)) > +#define DB_VALUE_EP0_OUT BIT(0) > +#define DB_VALUE_EP0_IN BIT(16) > + > +/* EP_IEN - bitmasks */ > +#define EP_IEN(index) (1 << (index)) > +#define EP_IEN_EP_OUT0 BIT(0) > +#define EP_IEN_EP_IN0 BIT(16) > + > +/* EP_ISTS - bitmasks */ > +#define EP_ISTS(index) (1 << (index)) > +#define EP_ISTS_EP_OUT0 BIT(0) > +#define EP_ISTS_EP_IN0 BIT(16) > + > +/* EP_PWR- bitmasks */ > +/*Power Shut Off capability enable*/ > +#define PUSB_PWR_PSO_EN BIT(0) > +/*Power Shut Off capability disable*/ > +#define PUSB_PWR_PSO_DS BIT(1) > +/* > + * Enables turning-off Reference Clock. > + * This bit is optional and implemented only when support for OTG is > + * implemented (indicated by OTG_READY bit set to '1'). > + */ > +#define PUSB_PWR_STB_CLK_SWITCH_EN BIT(8) > +/* > + * Status bit indicating that operation required by STB_CLK_SWITCH_EN write > + * is completed > + */ > +#define PUSB_PWR_STB_CLK_SWITCH_DONE BIT(9) > +/* This bit informs if Fast Registers Access is enabled. */ > +#define PUSB_PWR_FST_REG_ACCESS_STAT BIT(30) > +/* Fast Registers Access Enable. */ > +#define PUSB_PWR_FST_REG_ACCESS BIT(31) > + > +/* USB_CAP1- bitmasks */ > +/* > + * SFR Interface type > + * These field reflects type of SFR interface implemented: > + * 0x0 - OCP > + * 0x1 - AHB, > + * 0x2 - PLB > + * 0x3 - AXI > + * 0x4-0xF - reserved > + */ > +#define USB_CAP1_SFR_TYPE_MASK GENMASK(3, 0) > +#define DEV_SFR_TYPE_OCP(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x0) > +#define DEV_SFR_TYPE_AHB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x1) > +#define DEV_SFR_TYPE_PLB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x2) > +#define DEV_SFR_TYPE_AXI(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x3) > +/* > + * SFR Interface width > + * These field reflects width of SFR interface implemented: > + * 0x0 - 8 bit interface, > + * 0x1 - 16 bit interface, > + * 0x2 - 32 bit interface > + * 0x3 - 64 bit interface > + * 0x4-0xF - reserved > + */ > +#define USB_CAP1_SFR_WIDTH_MASK GENMASK(7, 4) > +#define DEV_SFR_WIDTH_8(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x0 << 4)) > +#define DEV_SFR_WIDTH_16(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x1 << 4)) > +#define DEV_SFR_WIDTH_32(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x2 << 4)) > +#define DEV_SFR_WIDTH_64(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x3 << 4)) > +/* > + * DMA Interface type > + * These field reflects type of DMA interface implemented: > + * 0x0 - OCP > + * 0x1 - AHB, > + * 0x2 - PLB > + * 0x3 - AXI > + * 0x4-0xF - reserved > + */ > +#define USB_CAP1_DMA_TYPE_MASK GENMASK(11, 8) > +#define DEV_DMA_TYPE_OCP(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x0 << 8)) > +#define DEV_DMA_TYPE_AHB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x1 << 8)) > +#define DEV_DMA_TYPE_PLB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x2 << 8)) > +#define DEV_DMA_TYPE_AXI(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x3 << 8)) > +/* > + * DMA Interface width > + * These field reflects width of DMA interface implemented: > + * 0x0 - reserved, > + * 0x1 - reserved, > + * 0x2 - 32 bit interface > + * 0x3 - 64 bit interface > + * 0x4-0xF - reserved > + */ > +#define USB_CAP1_DMA_WIDTH_MASK GENMASK(15, 12) > +#define DEV_DMA_WIDTH_32(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x2 << 12)) > +#define DEV_DMA_WIDTH_64(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x3 << 12)) > +/* > + * USB3 PHY Interface type > + * These field reflects type of USB3 PHY interface implemented: > + * 0x0 - USB PIPE, > + * 0x1 - RMMI, > + * 0x2-0xF - reserved > + */ > +#define USB_CAP1_U3PHY_TYPE_MASK GENMASK(19, 16) > +#define DEV_U3PHY_PIPE(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x0 << 16)) > +#define DEV_U3PHY_RMMI(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x1 << 16)) > +/* > + * USB3 PHY Interface width > + * These field reflects width of USB3 PHY interface implemented: > + * 0x0 - 8 bit PIPE interface, > + * 0x1 - 16 bit PIPE interface, > + * 0x2 - 32 bit PIPE interface, > + * 0x3 - 64 bit PIPE interface > + * 0x4-0xF - reserved > + * Note: When SSIC interface is implemented this field shows the width of > + * internal PIPE interface. The RMMI interface is always 20bit wide. > + */ > +#define USB_CAP1_U3PHY_WIDTH_MASK GENMASK(23, 20) > +#define DEV_U3PHY_WIDTH_8(p) \ > + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x0 << 20)) > +#define DEV_U3PHY_WIDTH_16(p) \ > + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x1 << 16)) > +#define DEV_U3PHY_WIDTH_32(p) \ > + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x2 << 20)) > +#define DEV_U3PHY_WIDTH_64(p) \ > + (((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x3 << 16)) > + > +/* > + * USB2 PHY Interface enable > + * These field informs if USB2 PHY interface is implemented: > + * 0x0 - interface NOT implemented, > + * 0x1 - interface implemented > + */ > +#define USB_CAP1_U2PHY_EN(p) ((p) & BIT(24)) > +/* > + * USB2 PHY Interface type > + * These field reflects type of USB2 PHY interface implemented: > + * 0x0 - UTMI, > + * 0x1 - ULPI > + */ > +#define DEV_U2PHY_ULPI(p) ((p) & BIT(25)) > +/* > + * USB2 PHY Interface width > + * These field reflects width of USB2 PHY interface implemented: > + * 0x0 - 8 bit interface, > + * 0x1 - 16 bit interface, > + * Note: The ULPI interface is always 8bit wide. > + */ > +#define DEV_U2PHY_WIDTH_16(p) ((p) & BIT(26)) > +/* > + * OTG Ready > + * 0x0 - pure device mode > + * 0x1 - some features and ports for CDNS USB OTG controller are implemented. > + */ > +#define USB_CAP1_OTG_READY(p) ((p) & BIT(27)) > + > +/* USB_CAP2- bitmasks */ > +/* > + * The actual size of the connected On-chip RAM memory in kB: > + * - 0 means 256 kB (max supported mem size) > + * - value other than 0 reflects the mem size in kB > + */ > +#define USB_CAP2_ACTUAL_MEM_SIZE(p) ((p) & GENMASK(7, 0)) > +/* > + * Max supported mem size > + * These field reflects width of on-chip RAM address bus width, > + * which determines max supported mem size: > + * 0x0-0x7 - reserved, > + * 0x8 - support for 4kB mem, > + * 0x9 - support for 8kB mem, > + * 0xA - support for 16kB mem, > + * 0xB - support for 32kB mem, > + * 0xC - support for 64kB mem, > + * 0xD - support for 128kB mem, > + * 0xE - support for 256kB mem, > + * 0xF - reserved > + */ > +#define USB_CAP2_MAX_MEM_SIZE(p) ((p) & GENMASK(11, 8)) > + > +/* USB_CAP3- bitmasks */ > +#define EP_IS_IMPLEMENTED(reg, index) ((reg) & (1 << (index))) > + > +/* USB_CAP4- bitmasks */ > +#define EP_SUPPORT_ISO(reg, index) ((reg) & (1 << (index))) > + > +/* USB_CAP5- bitmasks */ > +#define EP_SUPPORT_STREAM(reg, index) ((reg) & (1 << (index))) > + > +/* USB_CAP6- bitmasks */ > +/* The USBSS-DEV Controller Internal build number. */ > +#define GET_DEV_VERSION__INTERNAL_NUMBER(p) ((p) & GENMASK(7, 0)) > +/* The USBSS-DEV Controller version number. */ > +#define GET_DEV_VERSION(p) ((p) & GENMASK(31, 8)) > + > +/* DBG_LINK1- bitmasks */ > +/* > + * LFPS_MIN_DET_U1_EXIT value This parameter configures the minimum > + * time required for decoding the received LFPS as an LFPS.U1_Exit. > + */ > +#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT(p) ((p) & GENMASK(7, 0)) > +/* > + * LFPS_MIN_GEN_U1_EXIT value This parameter configures the minimum time for > + * phytxelecidle deassertion when LFPS.U1_Exit > + */ > +#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(p) (((p) << 8) & GENMASK(15, 8)) > +/* > + * RXDET_BREAK_DIS value This parameter configures terminating the Far-end > + * Receiver termination detection sequence: > + * 0: it is possible that USBSS_DEV will terminate Farend receiver > + * termination detection sequence > + * 1: USBSS_DEV will not terminate Far-end receiver termination > + * detection sequence > + */ > +#define DBG_LINK1_RXDET_BREAK_DIS BIT(16) > +/* LFPS_GEN_PING value This parameter configures the LFPS.Ping generation */ > +#define DBG_LINK1_LFPS_GEN_PING(p) (((p) << 17) & GENMASK(21, 17)) > +/* > + * Set the LFPS_MIN_DET_U1_EXIT value Writing '1' to this bit writes the > + * LFPS_MIN_DET_U1_EXIT field value to the device. This bit is automatically > + * cleared. Writing '0' has no effect > + */ > +#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT_SET BIT(24) > +/* > + * Set the LFPS_MIN_GEN_U1_EXIT value. Writing '1' to this bit writes the > + * LFPS_MIN_GEN_U1_EXIT field value to the device. This bit is automatically > + * cleared. Writing '0' has no effect > + */ > +#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET BIT(25) > +/* > + * Set the RXDET_BREAK_DIS value Writing '1' to this bit writes > + * the RXDET_BREAK_DIS field value to the device. This bit is automatically > + * cleared. Writing '0' has no effect > + */ > +#define DBG_LINK1_RXDET_BREAK_DIS_SET BIT(26) > +/* > + * Set the LFPS_GEN_PING_SET value Writing '1' to this bit writes > + * the LFPS_GEN_PING field value to the device. This bit is automatically > + * cleared. Writing '0' has no effect." > + */ > +#define DBG_LINK1_LFPS_GEN_PING_SET BIT(27) > + > +#define gadget_to_cdns3_device(g) (container_of(g, struct cdns3_device, gadget)) > + > +#define ep_to_cdns3_ep(ep) (container_of(ep, struct cdns3_endpoint, endpoint)) > + > +/*-------------------------------------------------------------------------*/ > +/* > + * USBSS-DEV DMA interface. > + */ > +#define TRBS_PER_SEGMENT 40 > + > +#define ISO_MAX_INTERVAL 10 > + > +/* > + *Only for ISOC endpoints - maximum number of TRBs is calculated as > + * pow(2, bInterval-1) * number of usb requests. It is limitation made by > + * driver to save memory. Controller must prepare TRB for each ITP even > + * if bInterval > 1. It's the reason why driver needs so many TRBs for > + * isochronous endpoints. > + */ > +#define TRBS_PER_ISOC_SEGMENT (ISO_MAX_INTERVAL * 8) > + > +#define GET_TRBS_PER_SEGMENT(ep_type) ((ep_type) == USB_ENDPOINT_XFER_ISOC ? \ > + TRBS_PER_ISOC_SEGMENT : TRBS_PER_SEGMENT) > +/** > + * struct cdns3_trb - represent Transfer Descriptor block. > + * @buffer: pointer to buffer data > + * @length: length of data > + * @control: control flags. > + * > + * This structure describes transfer block serviced by DMA module. > + */ > +struct cdns3_trb { > + __le32 buffer; > + __le32 length; > + __le32 control; > +}; > + > +#define TRB_SIZE (sizeof(struct cdns3_trb)) > +#define TRB_RING_SIZE (TRB_SIZE * TRBS_PER_SEGMENT) > +#define TRB_ISO_RING_SIZE (TRB_SIZE * TRBS_PER_ISOC_SEGMENT) > +#define TRB_CTRL_RING_SIZE (TRB_SIZE * 2) > + > +/* TRB bit mask */ > +#define TRB_TYPE_BITMASK GENMASK(15, 10) > +#define TRB_TYPE(p) ((p) << 10) > +#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10) > + > +/* TRB type IDs */ > +/* bulk, interrupt, isoc , and control data stage */ > +#define TRB_NORMAL 1 > +/* TRB for linking ring segments */ > +#define TRB_LINK 6 > + > +/* Cycle bit - indicates TRB ownership by driver or hw*/ > +#define TRB_CYCLE BIT(0) > +/* > + * When set to '1', the device will toggle its interpretation of the Cycle bit > + */ > +#define TRB_TOGGLE BIT(1) > + > +/* Interrupt on short packet*/ > +#define TRB_ISP BIT(2) > +/*Setting this bit enables FIFO DMA operation mode*/ > +#define TRB_FIFO_MODE BIT(3) > +/* Set PCIe no snoop attribute */ > +#define TRB_CHAIN BIT(4) > +/* Interrupt on completion */ > +#define TRB_IOC BIT(5) > + > +/* stream ID bitmasks. */ > +#define TRB_STREAM_ID(p) ((p) & GENMASK(31, 16)) > + > +/* transfer_len bitmasks. */ > +#define TRB_LEN(p) ((p) & GENMASK(16, 0)) > + > +/* transfer_len bitmasks - bits 31:24 */ > +#define TRB_BURST_LEN(p) ((p) & GENMASK(31, 24)) > + > +/* Data buffer pointer bitmasks*/ > +#define TRB_BUFFER(p) ((p) & GENMASK(31, 0)) > + > +/*-------------------------------------------------------------------------*/ > +/* Driver numeric constants */ > + > +/* Such declaration should be added to ch9.h */ > +#define USB_DEVICE_MAX_ADDRESS 127 > + > +/* Endpoint init values */ > +#define CDNS3_EP_MAX_PACKET_LIMIT 1024 > +#define CDNS3_EP_MAX_STREAMS 15 > +#define CDNS3_EP0_MAX_PACKET_LIMIT 512 > + > +/* All endpoints including EP0 */ > +#define CDNS3_ENDPOINTS_MAX_COUNT 32 > +#define CDNS3_EP_ZLP_BUF_SIZE 1024 > + > +#define CDNS3_EP_BUF_SIZE 2 /* KB */ > +#define CDNS3_ALIGNED_BUF_SIZE 16384 /* Bytes */ > +#define CDNS3_MAX_NUM_DESCMISS_BUF 32 > +#define CDNS3_DESCMIS_BUF_SIZE 2048 /* Bytes */ > +/*-------------------------------------------------------------------------*/ > +/* Used structs */ > + > +struct cdns3_device; > + > +/** > + * struct cdns3_endpoint - extended device side representation of USB endpoint. > + * @endpoint: usb endpoint > + * @pending_req_list: list of requests queuing on transfer ring. > + * @deferred_req_list: list of requests waiting for queuing on transfer ring. > + * @descmiss_req_list: list of requests internally allocated by driver (WA1). > + * @trb_pool: transfer ring - array of transaction buffers > + * @trb_pool_dma: dma address of transfer ring > + * @cdns3_dev: device associated with this endpoint > + * @name: a human readable name e.g. ep1out > + * @flags: specify the current state of endpoint > + * @descmis_req: internal transfer object used for getting data from on-chip > + * buffer. It can happen only if function driver doesn't send usb_request > + * object on time. > + * @aligned_buff: aligned to 8 bytes data buffer. Buffer address used in > + * TRB shall be aligned to 8. > + * @aligned_dma_addr: dma address of aligned_buff > + * @dir: endpoint direction > + * @num: endpoint number (1 - 15) > + * @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK > + * @interval: interval between packets used for ISOC endpoint. > + * @free_trbs: number of free TRBs in transfer ring > + * @num_trbs: number of all TRBs in transfer ring > + * @pcs: producer cycle state > + * @ccs: consumer cycle state > + * @enqueue: enqueue index in transfer ring > + * @dequeue: dequeue index in transfer ring > + */ > +struct cdns3_endpoint { > + struct usb_ep endpoint; > + struct list_head pending_req_list; > + struct list_head deferred_req_list; > + struct list_head descmiss_req_list; > + > + struct cdns3_trb *trb_pool; > + dma_addr_t trb_pool_dma; > + > + struct cdns3_device *cdns3_dev; > + char name[20]; > + > +#define EP_ENABLED BIT(0) > +#define EP_STALL BIT(1) > +#define EP_WEDGE BIT(2) > +#define EP_TRANSFER_STARTED BIT(3) > +#define EP_UPDATE_EP_TRBADDR BIT(4) > +#define EP_PENDING_REQUEST BIT(5) > +#define EP_RING_FULL BIT(6) > +#define EP_CLAIMED BIT(7) > +#define EP_QUIRK_EXTRA_BUF_DET BIT(8) > +#define EP_QUIRK_EXTRA_BUF_EN BIT(9) > +#define EP_QUIRK_END_TRANSFER BIT(10) > + > + u32 flags; > + > + struct cdns3_request *descmis_req; > + > + void *aligned_buff; > + dma_addr_t aligned_dma_addr; > + u8 dir; > + u8 num; > + u8 type; > + int interval; > + > + int free_trbs; > + int num_trbs; > + u8 pcs; > + u8 ccs; > + int enqueue; > + int dequeue; > +}; > + > +/** > + * struct cdns3_request - extended device side representation of usb_request > + * object . > + * @request: generic usb_request object describing single I/O request. > + * @priv_ep: extended representation of usb_ep object > + * @trb: the first TRB association with this request > + * @start_trb: number of the first TRB in transfer ring > + * @end_trb: number of the last TRB in transfer ring > + * @flags: flag specifying special usage of request > + * @list: used by internally allocated request to add to descmiss_req_list. > + */ > +struct cdns3_request { > + struct usb_request request; > + struct cdns3_endpoint *priv_ep; > + struct cdns3_trb *trb; > + int start_trb; > + int end_trb; > +#define REQUEST_PENDING BIT(0) > +#define REQUEST_INTERNAL BIT(1) > +#define REQUEST_INTERNAL_CH BIT(2) > +#define REQUEST_ZLP BIT(3) > + u32 flags; > + struct list_head list; > +}; > + > +#define to_cdns3_request(r) (container_of(r, struct cdns3_request, request)) > + > +/*Stages used during enumeration process.*/ > +#define CDNS3_SETUP_STAGE 0x0 > +#define CDNS3_DATA_STAGE 0x1 > +#define CDNS3_STATUS_STAGE 0x2 > + > +/** > + * struct cdns3_device - represent USB device. > + * @dev: pointer to device structure associated whit this controller > + * @sysdev: pointer to the DMA capable device > + * @gadget: device side representation of the peripheral controller > + * @gadget_driver: pointer to the gadget driver > + * @dev_ver: device controller version. > + * @lock: for synchronizing > + * @regs: base address for device side registers > + * @setup_buf: used while processing usb control requests > + * @setup_dma: dma address for setup_buf > + * @zlp_buf - zlp buffer > + * @ep0_stage: ep0 stage during enumeration process. > + * @ep0_data_dir: direction for control transfer > + * @eps: array of pointers to all endpoints with exclusion ep0 > + * @selected_ep: actually selected endpoint. It's used only to improve > + * performance. > + * @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP. > + * @u1_allowed: allow device transition to u1 state > + * @u2_allowed: allow device transition to u2 state > + * @is_selfpowered: device is self powered > + * @setup_pending: setup packet is processing by gadget driver > + * @hw_configured_flag: hardware endpoint configuration was set. > + * @wake_up_flag: allow device to remote up the host > + * @status_completion_no_call: indicate that driver is waiting for status s > + * stage completion. It's used in deferred SET_CONFIGURATION request. > + * @onchip_mem_allocated_size: actual size of on-chip memory assigned > + * to endpoints > + * @pending_status_wq: workqueue handling status stage for deferred requests. > + * @pending_status_request: request for which status stage was deferred > + */ > +struct cdns3_device { > + struct device *dev; > + struct device *sysdev; > + > + struct usb_gadget gadget; > + struct usb_gadget_driver *gadget_driver; > + > +#define CDNS_REVISION_V0 0x00024501 > +#define CDNS_REVISION_V1 0x00024509 > + u32 dev_ver; > + > + /* generic spin-lock for drivers */ > + spinlock_t lock; > + > + struct cdns3_usb_regs __iomem *regs; > + > + struct usb_ctrlrequest *setup_buf; > + dma_addr_t setup_dma; > + void *zlp_buf; > + > + u8 ep0_stage; > + int ep0_data_dir; > + > + struct cdns3_endpoint *eps[CDNS3_ENDPOINTS_MAX_COUNT]; > + > + u32 selected_ep; > + u16 isoch_delay; > + > + unsigned u1_allowed:1; > + unsigned u2_allowed:1; > + unsigned is_selfpowered:1; > + unsigned setup_pending:1; > + int hw_configured_flag:1; > + int wake_up_flag:1; > + unsigned status_completion_no_call:1; > + > + struct work_struct pending_status_wq; > + struct usb_request *pending_status_request; > + > + /*in KB */ > + int onchip_mem_allocated_size; > +}; > + > +int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec); > +void cdns3_set_register_bit(void __iomem *ptr, u32 mask); > +dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep, > + struct cdns3_trb *trb); > +enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev); > +void cdns3_pending_setup_status_handler(struct work_struct *work); > +void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev); > +void cdns3_set_hw_configuration(struct cdns3_device *priv_dev); > +void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep); > +void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable); > +struct usb_request *cdns3_next_request(struct list_head *list); > +int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, > + struct usb_request *request); > +int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep); > +u8 cdns3_ep_addr_to_index(u8 ep_addr); > +int cdns3_gadget_ep_set_wedge(struct usb_ep *ep); > +int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value); > +struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep, > + gfp_t gfp_flags); > +void cdns3_gadget_ep_free_request(struct usb_ep *ep, > + struct usb_request *request); > +int cdns3_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request); > +void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep, > + struct cdns3_request *priv_req, > + int status); > + > +int cdns3_init_ep0(struct cdns3_device *priv_dev, > + struct cdns3_endpoint *priv_ep); > +void cdns3_ep0_config(struct cdns3_device *priv_dev); > +void cdns3_ep_config(struct cdns3_endpoint *priv_ep); > +void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir); > + > +#endif /* __LINUX_CDNS3_GADGET */ > diff --git a/drivers/usb/cdns3/host-export.h b/drivers/usb/cdns3/host-export.h > new file mode 100644 > index 000000000000..b498a170b7e8 > --- /dev/null > +++ b/drivers/usb/cdns3/host-export.h > @@ -0,0 +1,28 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Cadence USBSS DRD Driver - Host Export APIs > + * > + * Copyright (C) 2017-2018 NXP > + * > + * Authors: Peter Chen > + */ > +#ifndef __LINUX_CDNS3_HOST_EXPORT > +#define __LINUX_CDNS3_HOST_EXPORT > + > +#ifdef CONFIG_USB_CDNS3_HOST > + > +int cdns3_host_init(struct cdns3 *cdns); > +void cdns3_host_exit(struct cdns3 *cdns); > + > +#else > + > +static inline int cdns3_host_init(struct cdns3 *cdns) > +{ > + return -ENXIO; > +} > + > +static inline void cdns3_host_exit(struct cdns3 *cdns) { } > + > +#endif /* CONFIG_USB_CDNS3_HOST */ > + > +#endif /* __LINUX_CDNS3_HOST_EXPORT */ > diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c > new file mode 100644 > index 000000000000..b43b0236a885 > --- /dev/null > +++ b/drivers/usb/cdns3/host.c > @@ -0,0 +1,72 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Cadence USBSS DRD Driver - host side > + * > + * Copyright (C) 2018 Cadence Design Systems. > + * Copyright (C) 2017-2018 NXP > + * > + * Authors: Peter Chen > + * Pawel Laszczak > + */ > + > +#include > +#include "core.h" > + > +static int __cdns3_host_init(struct cdns3 *cdns) > +{ > + struct platform_device *xhci; > + int ret; > + > + xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); > + if (!xhci) { > + dev_err(cdns->dev, "couldn't allocate xHCI device\n"); > + return -ENOMEM; > + } > + > + xhci->dev.parent = cdns->dev; > + cdns->host_dev = xhci; > + > + ret = platform_device_add_resources(xhci, cdns->xhci_res, > + CDNS3_XHCI_RESOURCES_NUM); > + if (ret) { > + dev_err(cdns->dev, "couldn't add resources to xHCI device\n"); > + goto err1; > + } > + > + ret = platform_device_add(xhci); > + if (ret) { > + dev_err(cdns->dev, "failed to register xHCI device\n"); > + goto err1; > + } > + > + return 0; > +err1: > + platform_device_put(xhci); > + return ret; > +} > + > +static void cdns3_host_exit(struct cdns3 *cdns) > +{ > + platform_device_unregister(cdns->host_dev); > + cdns->host_dev = NULL; > +} > + > +int cdns3_host_init(struct cdns3 *cdns) > +{ > + struct cdns3_role_driver *rdrv; > + > + rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); > + if (!rdrv) > + return -ENOMEM; > + > + rdrv->start = __cdns3_host_init; > + rdrv->stop = cdns3_host_exit; > + rdrv->state = CDNS3_ROLE_STATE_INACTIVE; > + rdrv->suspend = NULL; > + rdrv->resume = NULL; > + rdrv->name = "host"; > + > + cdns->roles[CDNS3_ROLE_HOST] = rdrv; > + > + return 0; > +} > diff --git a/drivers/usb/cdns3/trace.c b/drivers/usb/cdns3/trace.c > new file mode 100644 > index 000000000000..587ae08e019d > --- /dev/null > +++ b/drivers/usb/cdns3/trace.c > @@ -0,0 +1,11 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * USBSS device controller driver Trace Support > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > + > +#define CREATE_TRACE_POINTS > +#include "trace.h" > diff --git a/drivers/usb/cdns3/trace.h b/drivers/usb/cdns3/trace.h > new file mode 100644 > index 000000000000..f3d7a91fae86 > --- /dev/null > +++ b/drivers/usb/cdns3/trace.h > @@ -0,0 +1,389 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * USBSS device controller driver. > + * Trace support header file. > + * > + * Copyright (C) 2018 Cadence. > + * > + * Author: Pawel Laszczak > + */ > + > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM cdns3 > + > +#if !defined(__LINUX_CDNS3_TRACE) || defined(TRACE_HEADER_MULTI_READ) > +#define __LINUX_CDNS3_TRACE > + > +#include > +#include > +#include > +#include > +#include "core.h" > +#include "gadget.h" > +#include "debug.h" > + > +#define CDNS3_MSG_MAX 500 > + > +DECLARE_EVENT_CLASS(cdns3_log_doorbell, > + TP_PROTO(const char *ep_name, u32 ep_trbaddr), > + TP_ARGS(ep_name, ep_trbaddr), > + TP_STRUCT__entry( > + __string(name, ep_name) > + __field(u32, ep_trbaddr) > + ), > + TP_fast_assign( > + __assign_str(name, ep_name); > + __entry->ep_trbaddr = ep_trbaddr; > + ), > + TP_printk("//Ding Dong %s, ep_trbaddr %08x", __get_str(name), > + __entry->ep_trbaddr) > +); > + > +DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_ep0, > + TP_PROTO(const char *ep_name, u32 ep_trbaddr), > + TP_ARGS(ep_name, ep_trbaddr) > +); > + > +DEFINE_EVENT(cdns3_log_doorbell, cdns3_doorbell_epx, > + TP_PROTO(const char *ep_name, u32 ep_trbaddr), > + TP_ARGS(ep_name, ep_trbaddr) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_usb_irq, > + TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists), > + TP_ARGS(priv_dev, usb_ists), > + TP_STRUCT__entry( > + __field(enum usb_device_speed, speed) > + __field(u32, usb_ists) > + __dynamic_array(char, str, CDNS3_MSG_MAX) > + ), > + TP_fast_assign( > + __entry->speed = cdns3_get_speed(priv_dev); > + __entry->usb_ists = usb_ists; > + ), > + TP_printk("%s", cdns3_decode_usb_irq(__get_str(str), __entry->speed, > + __entry->usb_ists)) > +); > + > +DEFINE_EVENT(cdns3_log_usb_irq, cdns3_usb_irq, > + TP_PROTO(struct cdns3_device *priv_dev, u32 usb_ists), > + TP_ARGS(priv_dev, usb_ists) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_epx_irq, > + TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_dev, priv_ep), > + TP_STRUCT__entry( > + __string(ep_name, priv_ep->name) > + __field(u32, ep_sts) > + __field(u32, ep_traddr) > + __dynamic_array(char, str, CDNS3_MSG_MAX) > + ), > + TP_fast_assign( > + __assign_str(ep_name, priv_ep->name); > + __entry->ep_sts = readl(&priv_dev->regs->ep_sts); > + __entry->ep_traddr = readl(&priv_dev->regs->ep_traddr); > + ), > + TP_printk("%s, ep_traddr: %08x", > + cdns3_decode_epx_irq(__get_str(str), > + __get_str(ep_name), > + __entry->ep_sts), > + __entry->ep_traddr) > +); > + > +DEFINE_EVENT(cdns3_log_epx_irq, cdns3_epx_irq, > + TP_PROTO(struct cdns3_device *priv_dev, struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_dev, priv_ep) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_ep0_irq, > + TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts), > + TP_ARGS(priv_dev, ep_sts), > + TP_STRUCT__entry( > + __field(int, ep_dir) > + __field(u32, ep_sts) > + __dynamic_array(char, str, CDNS3_MSG_MAX) > + ), > + TP_fast_assign( > + __entry->ep_dir = priv_dev->ep0_data_dir; > + __entry->ep_sts = ep_sts; > + ), > + TP_printk("%s", cdns3_decode_ep0_irq(__get_str(str), > + __entry->ep_dir, > + __entry->ep_sts)) > +); > + > +DEFINE_EVENT(cdns3_log_ep0_irq, cdns3_ep0_irq, > + TP_PROTO(struct cdns3_device *priv_dev, u32 ep_sts), > + TP_ARGS(priv_dev, ep_sts) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_ctrl, > + TP_PROTO(struct usb_ctrlrequest *ctrl), > + TP_ARGS(ctrl), > + TP_STRUCT__entry( > + __field(u8, bRequestType) > + __field(u8, bRequest) > + __field(u16, wValue) > + __field(u16, wIndex) > + __field(u16, wLength) > + __dynamic_array(char, str, CDNS3_MSG_MAX) > + ), > + TP_fast_assign( > + __entry->bRequestType = ctrl->bRequestType; > + __entry->bRequest = ctrl->bRequest; > + __entry->wValue = le16_to_cpu(ctrl->wValue); > + __entry->wIndex = le16_to_cpu(ctrl->wIndex); > + __entry->wLength = le16_to_cpu(ctrl->wLength); > + ), > + TP_printk("%s", usb_decode_ctrl(__get_str(str), __entry->bRequestType, > + __entry->bRequest, __entry->wValue, > + __entry->wIndex, __entry->wLength) > + ) > +); > + > +DEFINE_EVENT(cdns3_log_ctrl, cdns3_ctrl_req, > + TP_PROTO(struct usb_ctrlrequest *ctrl), > + TP_ARGS(ctrl) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_request, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req), > + TP_STRUCT__entry( > + __string(name, req->priv_ep->name) > + __field(struct cdns3_request *, req) > + __field(unsigned int, actual) > + __field(unsigned int, length) > + __field(int, status) > + __field(int, zero) > + __field(int, short_not_ok) > + __field(int, no_interrupt) > + __field(int, start_trb) > + __field(int, end_trb) > + __field(struct cdns3_trb *, start_trb_addr) > + __field(int, flags) > + ), > + TP_fast_assign( > + __assign_str(name, req->priv_ep->name); > + __entry->req = req; > + __entry->actual = req->request.actual; > + __entry->length = req->request.length; > + __entry->status = req->request.status; > + __entry->zero = req->request.zero; > + __entry->short_not_ok = req->request.short_not_ok; > + __entry->no_interrupt = req->request.no_interrupt; > + __entry->start_trb = req->start_trb; > + __entry->end_trb = req->end_trb; > + __entry->start_trb_addr = req->trb; > + __entry->flags = req->flags; > + ), > + TP_printk("%s: req: %p, length: %u/%u %s%s%s, status: %d," > + " trb: [start:%d, end:%d: virt addr %pa], flags:%x ", > + __get_str(name), __entry->req, __entry->actual, __entry->length, > + __entry->zero ? "zero | " : "", > + __entry->short_not_ok ? "short | " : "", > + __entry->no_interrupt ? "no int" : "", > + __entry->status, > + __entry->start_trb, > + __entry->end_trb, > + __entry->start_trb_addr, > + __entry->flags > + ) > +); > + > +DEFINE_EVENT(cdns3_log_request, cdns3_alloc_request, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req) > +); > + > +DEFINE_EVENT(cdns3_log_request, cdns3_free_request, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req) > +); > + > +DEFINE_EVENT(cdns3_log_request, cdns3_ep_queue, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req) > +); > + > +DEFINE_EVENT(cdns3_log_request, cdns3_ep_dequeue, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req) > +); > + > +DEFINE_EVENT(cdns3_log_request, cdns3_gadget_giveback, > + TP_PROTO(struct cdns3_request *req), > + TP_ARGS(req) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_trb, > + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb), > + TP_ARGS(priv_ep, trb), > + TP_STRUCT__entry( > + __string(name, priv_ep->name) > + __field(struct cdns3_trb *, trb) > + __field(u32, buffer) > + __field(u32, length) > + __field(u32, control) > + __field(u32, type) > + ), > + TP_fast_assign( > + __assign_str(name, priv_ep->name); > + __entry->trb = trb; > + __entry->buffer = trb->buffer; > + __entry->length = trb->length; > + __entry->control = trb->control; > + __entry->type = usb_endpoint_type(priv_ep->endpoint.desc); > + ), > + TP_printk("%s: trb 0x%pa, dma buf: 0x%08x, size: %ld, ctrl: 0x%08x (%s%s%s%s%s%s%s)", > + __get_str(name), __entry->trb, __entry->buffer, > + TRB_LEN(__entry->length), __entry->control, > + __entry->control & TRB_CYCLE ? "C=1, " : "C=0, ", > + __entry->control & TRB_TOGGLE ? "T=1, " : "T=0, ", > + __entry->control & TRB_ISP ? "ISP, " : "", > + __entry->control & TRB_FIFO_MODE ? "FIFO, " : "", > + __entry->control & TRB_CHAIN ? "CHAIN, " : "", > + __entry->control & TRB_IOC ? "IOC, " : "", > + TRB_FIELD_TO_TYPE(__entry->control) == TRB_NORMAL ? "Normal" : "LINK" > + ) > +); > + > +DEFINE_EVENT(cdns3_log_trb, cdns3_prepare_trb, > + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb), > + TP_ARGS(priv_ep, trb) > +); > + > +DEFINE_EVENT(cdns3_log_trb, cdns3_complete_trb, > + TP_PROTO(struct cdns3_endpoint *priv_ep, struct cdns3_trb *trb), > + TP_ARGS(priv_ep, trb) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_ring, > + TP_PROTO(struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_ep), > + TP_STRUCT__entry( > + __dynamic_array(u8, ring, TRB_RING_SIZE) > + __dynamic_array(u8, priv_ep, sizeof(struct cdns3_endpoint)) > + __dynamic_array(char, buffer, > + (TRBS_PER_SEGMENT * 65) + CDNS3_MSG_MAX) > + ), > + TP_fast_assign( > + memcpy(__get_dynamic_array(priv_ep), priv_ep, > + sizeof(struct cdns3_endpoint)); > + memcpy(__get_dynamic_array(ring), priv_ep->trb_pool, > + TRB_RING_SIZE); > + ), > + > + TP_printk("%s", > + cdns3_dbg_ring((struct cdns3_endpoint *)__get_str(priv_ep), > + (struct cdns3_trb *)__get_str(ring), > + __get_str(buffer))) > +); > + > +DEFINE_EVENT(cdns3_log_ring, cdns3_ring, > + TP_PROTO(struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_ep) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_ep, > + TP_PROTO(struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_ep), > + TP_STRUCT__entry( > + __string(name, priv_ep->name) > + __field(unsigned int, maxpacket) > + __field(unsigned int, maxpacket_limit) > + __field(unsigned int, max_streams) > + __field(unsigned int, maxburst) > + __field(unsigned int, flags) > + __field(unsigned int, dir) > + __field(u8, enqueue) > + __field(u8, dequeue) > + ), > + TP_fast_assign( > + __assign_str(name, priv_ep->name); > + __entry->maxpacket = priv_ep->endpoint.maxpacket; > + __entry->maxpacket_limit = priv_ep->endpoint.maxpacket_limit; > + __entry->max_streams = priv_ep->endpoint.max_streams; > + __entry->maxburst = priv_ep->endpoint.maxburst; > + __entry->flags = priv_ep->flags; > + __entry->dir = priv_ep->dir; > + __entry->enqueue = priv_ep->enqueue; > + __entry->dequeue = priv_ep->dequeue; > + ), > + TP_printk("%s: mps: %d/%d. streams: %d, burst: %d, enq idx: %d, " > + "deq idx: %d, flags %s%s%s%s%s%s%s%s, dir: %s", > + __get_str(name), __entry->maxpacket, > + __entry->maxpacket_limit, __entry->max_streams, > + __entry->maxburst, __entry->enqueue, > + __entry->dequeue, > + __entry->flags & EP_ENABLED ? "EN | " : "", > + __entry->flags & EP_STALL ? "STALL | " : "", > + __entry->flags & EP_WEDGE ? "WEDGE | " : "", > + __entry->flags & EP_TRANSFER_STARTED ? "STARTED | " : "", > + __entry->flags & EP_UPDATE_EP_TRBADDR ? "UPD TRB | " : "", > + __entry->flags & EP_PENDING_REQUEST ? "REQ PEN | " : "", > + __entry->flags & EP_RING_FULL ? "RING FULL |" : "", > + __entry->flags & EP_CLAIMED ? "CLAIMED " : "", > + __entry->dir ? "IN" : "OUT" > + ) > +); > + > +DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_enable, > + TP_PROTO(struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_ep) > +); > + > +DEFINE_EVENT(cdns3_log_ep, cdns3_gadget_ep_disable, > + TP_PROTO(struct cdns3_endpoint *priv_ep), > + TP_ARGS(priv_ep) > +); > + > +DECLARE_EVENT_CLASS(cdns3_log_request_handled, > + TP_PROTO(struct cdns3_request *priv_req, int current_index, > + int handled), > + TP_ARGS(priv_req, current_index, handled), > + TP_STRUCT__entry( > + __field(struct cdns3_request *, priv_req) > + __field(unsigned int, dma_position) > + __field(unsigned int, handled) > + __field(unsigned int, dequeue_idx) > + __field(unsigned int, enqueue_idx) > + __field(unsigned int, start_trb) > + __field(unsigned int, end_trb) > + ), > + TP_fast_assign( > + __entry->priv_req = priv_req; > + __entry->dma_position = current_index; > + __entry->handled = handled; > + __entry->dequeue_idx = priv_req->priv_ep->dequeue; > + __entry->enqueue_idx = priv_req->priv_ep->enqueue; > + __entry->start_trb = priv_req->start_trb; > + __entry->end_trb = priv_req->end_trb; > + ), > + TP_printk("Req: %p %s, DMA pos: %d, ep deq: %d, ep enq: %d," > + " start trb: %d, end trb: %d", > + __entry->priv_req, > + __entry->handled ? "handled" : "not handled", > + __entry->dma_position, __entry->dequeue_idx, > + __entry->enqueue_idx, __entry->start_trb, > + __entry->end_trb > + ) > +); > + > +DEFINE_EVENT(cdns3_log_request_handled, cdns3_request_handled, > + TP_PROTO(struct cdns3_request *priv_req, int current_index, > + int handled), > + TP_ARGS(priv_req, current_index, handled) > +); > +#endif /* __LINUX_CDNS3_TRACE */ > + > +/* this part must be outside header guard */ > + > +#undef TRACE_INCLUDE_PATH > +#define TRACE_INCLUDE_PATH . > + > +#undef TRACE_INCLUDE_FILE > +#define TRACE_INCLUDE_FILE trace > + > +#include > -- > 2.17.1 >