* [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver
[not found] <1365746856-7772-2-git-send-email-manjunath.goudar@linaro.org>
@ 2013-05-07 9:50 ` Manjunath Goudar
2013-05-07 9:50 ` [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-07 9:50 ` [RFC PATCH 2/2] USB: OHCI: make ohci-pci a separate driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
` (2 subsequent siblings)
3 siblings, 2 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-07 9:50 UTC (permalink / raw)
To: linux-arm-kernel
This series of patches begins the process of splitting ohci-hcd up into
a core library module and independent pci driver modules.
Patch 1/2 prepares the way by exporting a few functions from ohci-hcd
and adding a new mechanism for platform-specific drivers to initialize
their hc_driver structures. This deserves to be done in the core
because almost all of the entries in these structures are pure
boilerplate -- practically none of the drivers need to override more
than three of the standard core values.
Patch 2/2 separate out ohci-pci into independent driver modules.
Manjunath Goudar (2):
USB: OHCI: prepare to make ohci-hcd a library module
USB: OHCI: make ohci-pci a separate driver
drivers/usb/host/Kconfig | 9 ++-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 142 +++++++++++++++++++++++++++++---------
drivers/usb/host/ohci-pci.c | 129 ++++++++++------------------------
drivers/usb/host/ohci-platform.c | 2 +-
drivers/usb/host/ohci-q.c | 13 ++++
drivers/usb/host/ohci.h | 30 +++++++-
7 files changed, 197 insertions(+), 131 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-07 9:50 ` [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-07 9:50 ` Manjunath Goudar
2013-05-07 15:15 ` Alan Stern
2013-05-07 9:50 ` [RFC PATCH 2/2] USB: OHCI: make ohci-pci a separate driver Manjunath Goudar
1 sibling, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-07 9:50 UTC (permalink / raw)
To: linux-arm-kernel
This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
In V2:
-ohci_hcd_init(), ohci_run() and ohci_stop revert back to static routine.
-ohci_setup() and ohci_start() functions written to generic OHCI initialization
for all ohci bus glue.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Makefile | 2 +
drivers/usb/host/ohci-hcd.c | 123 +++++++++++++++++++++++++++++++++-----
drivers/usb/host/ohci-pci.c | 2 +-
drivers/usb/host/ohci-platform.c | 2 +-
drivers/usb/host/ohci.h | 30 +++++++++-
5 files changed, 138 insertions(+), 21 deletions(-)
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 58c14c1..a38d76b 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -40,7 +40,9 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
+
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9e6de95..7922c61 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
#include "pci-quirks.h"
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static int ohci_init (struct ohci_hcd *ohci);
-static void ohci_stop (struct usb_hcd *hcd);
-
-#if defined(CONFIG_PM) || defined(CONFIG_PCI)
-static int ohci_restart (struct ohci_hcd *ohci);
-#endif
-
+static void ohci_stop(struct usb_hcd *hcd);
#ifdef CONFIG_PCI
static void sb800_prefetch(struct ohci_hcd *ohci, int on);
#else
@@ -520,7 +514,7 @@ done:
/* init memory, and kick BIOS/SMM off */
-static int ohci_init (struct ohci_hcd *ohci)
+int ohci_init(struct ohci_hcd *ohci)
{
int ret;
struct usb_hcd *hcd = ohci_to_hcd(ohci);
@@ -590,6 +584,7 @@ static int ohci_init (struct ohci_hcd *ohci)
return ret;
}
+EXPORT_SYMBOL_GPL(ohci_init);
/*-------------------------------------------------------------------------*/
@@ -597,11 +592,11 @@ static int ohci_init (struct ohci_hcd *ohci)
* resets USB and controller
* enable interrupts
*/
-static int ohci_run (struct ohci_hcd *ohci)
+static int ohci_run(struct usb_hcd *hcd)
{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
u32 mask, val;
int first = ohci->fminterval == 0;
- struct usb_hcd *hcd = ohci_to_hcd(ohci);
ohci->rh_state = OHCI_RH_HALTED;
@@ -767,7 +762,37 @@ retry:
return 0;
}
+/*------------------------------------------------------------------------*/
+
+/* ohci generic function for all OHCI bus glue */
+
+static int ohci_setup(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int retval;
+
+ ohci->sbrn = HCD_USB11;
+
+ /* data structure init */
+ retval = ohci_init(ohci);
+ if (retval)
+ return retval;
+ ohci_usb_reset(ohci);
+ return 0;
+}
+static int ohci_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+ ret = ohci_run(hcd);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
@@ -949,11 +974,12 @@ static void ohci_stop (struct usb_hcd *hcd)
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
/* must not be called from interrupt context */
-static int ohci_restart (struct ohci_hcd *ohci)
+int ohci_restart(struct ohci_hcd *ohci)
{
int temp;
int i;
struct urb_priv *priv;
+ struct usb_hcd *hcd;
spin_lock_irq(&ohci->lock);
ohci->rh_state = OHCI_RH_HALTED;
@@ -1001,19 +1027,22 @@ static int ohci_restart (struct ohci_hcd *ohci)
ohci->ed_controltail = NULL;
ohci->ed_bulktail = NULL;
- if ((temp = ohci_run (ohci)) < 0) {
- ohci_err (ohci, "can't restart, %d\n", temp);
+ hcd = ohci_to_hcd(ohci);
+ temp = ohci_run(hcd);
+ if (temp < 0) {
+ ohci_err(ohci, "can't restart, %d\n", temp);
return temp;
}
ohci_dbg(ohci, "restart complete\n");
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_restart);
#endif
#ifdef CONFIG_PM
-static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
@@ -1031,9 +1060,9 @@ static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_suspend);
-
-static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
+int ohci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int port;
@@ -1081,11 +1110,73 @@ static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_resume);
#endif
/*-------------------------------------------------------------------------*/
+/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+
+static const struct hc_driver ohci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_setup,
+ .start = ohci_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+ .start_port_reset = ohci_start_port_reset,
+};
+
+void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ohci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+EXPORT_SYMBOL_GPL(ohci_init_driver);
+
+/*-------------------------------------------------------------------------*/
+
MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 951514e..0b34b59 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -288,7 +288,7 @@ static int ohci_pci_start (struct usb_hcd *hcd)
}
#endif /* CONFIG_PM */
- ret = ohci_run (ohci);
+ ret = ohci_run(hcd);
if (ret < 0) {
ohci_err (ohci, "can't start\n");
ohci_stop (hcd);
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index c3e7287..545c657 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -46,7 +46,7 @@ static int ohci_platform_start(struct usb_hcd *hcd)
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int err;
- err = ohci_run(ohci);
+ err = ohci_run(hcd);
if (err < 0) {
ohci_err(ohci, "can't start\n");
ohci_stop(hcd);
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d329914..455e9b1 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -357,7 +357,6 @@ struct ohci_hcd {
* I/O memory used to communicate with the HC (dma-consistent)
*/
struct ohci_regs __iomem *regs;
-
/*
* main memory used to communicate with the HC (dma-consistent).
* hcd adds to schedule for a live hc any time, but removals finish
@@ -373,7 +372,6 @@ struct ohci_hcd {
struct ed *periodic [NUM_INTS]; /* shadow int_table */
void (*start_hnp)(struct ohci_hcd *ohci);
-
/*
* memory management for queue data structures
*/
@@ -392,7 +390,7 @@ struct ohci_hcd {
unsigned long next_statechange; /* suspend/resume */
u32 fminterval; /* saved register */
unsigned autostop:1; /* rh auto stopping/stopped */
-
+ u8 sbrn;
unsigned long flags; /* for HC bugs */
#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
#define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */
@@ -718,3 +716,29 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
{ return ohci_readl (hc, &hc->regs->roothub.status); }
static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over);
+extern int ohci_init(struct ohci_hcd *ohci);
+extern int ohci_restart(struct ohci_hcd *ohci);
+#ifdef CONFIG_PM
+extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#else
+static inline int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+{
+ return 0;
+}
+static inline int ohci_resume(struct usb_hcd *hcd, bool hibernated)
+{
+ return 0;
+}
+#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC PATCH 2/2] USB: OHCI: make ohci-pci a separate driver
2013-05-07 9:50 ` [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-07 9:50 ` [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-07 9:50 ` Manjunath Goudar
1 sibling, 0 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-07 9:50 UTC (permalink / raw)
To: linux-arm-kernel
This patch splits the PCI portion of ohci-hcd out into its
own separate driver module, called ohci-pci. Consistently with the
current practice, the decision whether to build this module is not
user-configurable. If OHCI_PCI are enabled then the module will
be built, always.
V2:
- few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
and rest of the generic code is written in ohci_start of ohci-hcd.c file.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 9 ++-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-hcd.c | 19 +------
drivers/usb/host/ohci-pci.c | 129 +++++++++++++------------------------------
drivers/usb/host/ohci-q.c | 13 +++++
5 files changed, 60 insertions(+), 111 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 7a1a248..3620ecce 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -333,8 +333,13 @@ config USB_ISP1362_HCD
To compile this driver as a module, choose M here: the
module will be called isp1362-hcd.
+config USB_OHCI_PCI
+ tristate
+ depends on USB_OHCI_HCD && PCI
+ default y
+
config USB_OHCI_HCD
- tristate "OHCI HCD support"
+ tristate "OHCI HCD (USB 1.1) support"
depends on USB && USB_ARCH_HAS_OHCI
select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
select USB_OTG_UTILS if ARCH_OMAP
@@ -402,7 +407,7 @@ config USB_OHCI_HCD_PPC_OF
default USB_OHCI_HCD_PPC_OF_BE || USB_OHCI_HCD_PPC_OF_LE
config USB_OHCI_HCD_PCI
- bool "OHCI support for PCI-bus USB controllers"
+ tristate "OHCI support for PCI-bus USB controllers"
depends on USB_OHCI_HCD && PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
default y
select USB_OHCI_LITTLE_ENDIAN
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index a38d76b..a20a8d9 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+obj-$(CONFIG_USB_OHCI_PCI) += ohci-pci.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 7922c61..2e62e7d 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -95,7 +95,6 @@ static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
#include "ohci-mem.c"
#include "ohci-q.c"
-
/*
* On architectures with edge-triggered interrupts we must never return
* IRQ_NONE.
@@ -585,7 +584,6 @@ int ohci_init(struct ohci_hcd *ohci)
return ret;
}
EXPORT_SYMBOL_GPL(ohci_init);
-
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
@@ -1181,11 +1179,6 @@ MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
-#ifdef CONFIG_PCI
-#include "ohci-pci.c"
-#define PCI_DRIVER ohci_pci_driver
-#endif
-
#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
#include "ohci-sa1111.c"
#define SA1111_DRIVER ohci_hcd_sa1111_driver
@@ -1281,7 +1274,7 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_platform_driver
#endif
-#if !defined(PCI_DRIVER) && \
+#if !IS_ENABLED(CONFIG_USB_OHCI_PCI) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \
@@ -1356,12 +1349,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_sa1111;
#endif
-#ifdef PCI_DRIVER
- retval = pci_register_driver(&PCI_DRIVER);
- if (retval < 0)
- goto error_pci;
-#endif
-
#ifdef SM501_OHCI_DRIVER
retval = platform_driver_register(&SM501_OHCI_DRIVER);
if (retval < 0)
@@ -1455,10 +1442,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&SM501_OHCI_DRIVER);
error_sm501:
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
- error_pci:
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
error_sa1111:
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 0b34b59..20f6187 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -14,12 +14,19 @@
* This file is licenced under the GPL.
*/
-#ifndef CONFIG_PCI
-#error "This file is PCI bus glue. CONFIG_PCI must be defined."
-#endif
-
-#include <linux/pci.h>
#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+#include "pci-quirks.h"
+
+#define DRIVER_DESC "OHCI PCI platform driver"
+
+static const char hcd_name[] = "ohci-pci";
/*-------------------------------------------------------------------------*/
@@ -175,19 +182,6 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
return 0;
}
-static void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- struct pci_dev *pdev;
- u16 misc;
-
- pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
- pci_read_config_word(pdev, 0x50, &misc);
- if (on == 0)
- pci_write_config_word(pdev, 0x50, misc & 0xfcff);
- else
- pci_write_config_word(pdev, 0x50, misc | 0x0300);
-}
-
/* List of quirks for OHCI */
static const struct pci_device_id ohci_pci_quirks[] = {
{
@@ -261,95 +255,27 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
quirk = (void *)quirk_id->driver_data;
ret = quirk(hcd);
}
- }
- if (ret == 0) {
- ohci_hcd_init (ohci);
- return ohci_init (ohci);
- }
- return ret;
-}
-
-
-static int ohci_pci_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
#ifdef CONFIG_PM /* avoid warnings about unused pdev */
- if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
-
/* RWC may not be set for add-in PCI cards, since boot
* firmware probably ignored them. This transfers PCI
* PM wakeup capabilities.
*/
if (device_can_wakeup(&pdev->dev))
ohci->hc_control |= OHCI_CTRL_RWC;
- }
#endif /* CONFIG_PM */
-
- ret = ohci_run(hcd);
- if (ret < 0) {
- ohci_err (ohci, "can't start\n");
- ohci_stop (hcd);
}
+ if (ret == 0)
+ return ohci_init(ohci);
return ret;
}
+static struct hc_driver __read_mostly ohci_pci_hc_driver;
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_MEMORY | HCD_USB11,
-
- /*
- * basic lifecycle operations
- */
+static const struct ohci_driver_overrides overrides = {
+ .product_desc = "OHCI PCI host controller",
.reset = ohci_pci_reset,
- .start = ohci_pci_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
-#ifdef CONFIG_PM
- .pci_suspend = ohci_suspend,
- .pci_resume = ohci_resume,
-#endif
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ohci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ohci_hub_status_data,
- .hub_control = ohci_hub_control,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
};
-/*-------------------------------------------------------------------------*/
-
-
static const struct pci_device_id pci_ids [] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
@@ -377,3 +303,24 @@ static struct pci_driver ohci_pci_driver = {
},
#endif
};
+
+static int __init ohci_pci_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_pci_hc_driver, &overrides);
+ return pci_register_driver(&ohci_pci_driver);
+}
+module_init(ohci_pci_init);
+
+static void __exit ohci_pci_cleanup(void)
+{
+ pci_unregister_driver(&ohci_pci_driver);
+}
+module_exit(ohci_pci_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 88731b7..a7e8139 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -29,6 +29,19 @@ static void urb_free_priv (struct ohci_hcd *hc, urb_priv_t *urb_priv)
kfree (urb_priv);
}
+static void sb800_prefetch(struct ohci_hcd *ohci, int on)
+{
+ struct pci_dev *pdev;
+ u16 misc;
+
+ pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
+ pci_read_config_word(pdev, 0x50, &misc);
+ if (on == 0)
+ pci_write_config_word(pdev, 0x50, misc & 0xfcff);
+ else
+ pci_write_config_word(pdev, 0x50, misc | 0x0300);
+}
+
/*-------------------------------------------------------------------------*/
/*
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-07 9:50 ` [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-07 15:15 ` Alan Stern
0 siblings, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-07 15:15 UTC (permalink / raw)
To: linux-arm-kernel
On Tue, 7 May 2013, Manjunath Goudar wrote:
> This patch prepares ohci-hcd for being split up into a core
> library and separate platform driver modules. A generic
> ohci_hc_driver structure is created, containing all the "standard"
> values, and a new mechanism is added whereby a driver module can
> specify a set of overrides to those values. In addition the
> ohci_restart(),ohci_suspend() and ohci_resume() routines need
> to be EXPORTed for use by the drivers.
This patch still has several problems. For example, the description
doesn't mention the fact that ohci_init() was EXPORTed.
In fact, why was ohci_init() EXPORTed? I don't see any reason for
this. ohci_pci.c doesn't need to call it; just insert a call to
ohci_init() at the beginning of ohci_restart().
> In V2:
> -ohci_hcd_init(), ohci_run() and ohci_stop revert back to static routine.
They don't "revert" since they have never been non-static. You should
say something more like "ohci_hcd_init(), ohci_run(), and ohci_stop()
are not made non-static."
> -ohci_setup() and ohci_start() functions written to generic OHCI initialization
> for all ohci bus glue.
Fix the grammar in that sentence. And you should mention these new
functions in the main part of the patch description, not just down here.
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index 58c14c1..a38d76b 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -40,7 +40,9 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
> obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
> obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
> obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
> +
> obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
> +
You do not need to add these blank lines in this patch. If you want,
you can add them in the ohci-pci patch.
> obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
> obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
> obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index 9e6de95..7922c61 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
> #include "pci-quirks.h"
>
> static void ohci_dump (struct ohci_hcd *ohci, int verbose);
> -static int ohci_init (struct ohci_hcd *ohci);
> -static void ohci_stop (struct usb_hcd *hcd);
I thought ohci_stop() wasn't going to be changed in this patch. Why
was this line updated?
> -
> -#if defined(CONFIG_PM) || defined(CONFIG_PCI)
> -static int ohci_restart (struct ohci_hcd *ohci);
> -#endif
> -
> +static void ohci_stop(struct usb_hcd *hcd);
> #ifdef CONFIG_PCI
> static void sb800_prefetch(struct ohci_hcd *ohci, int on);
> #else
> @@ -520,7 +514,7 @@ done:
>
> /* init memory, and kick BIOS/SMM off */
>
> -static int ohci_init (struct ohci_hcd *ohci)
> +int ohci_init(struct ohci_hcd *ohci)
> {
> int ret;
> struct usb_hcd *hcd = ohci_to_hcd(ohci);
> @@ -590,6 +584,7 @@ static int ohci_init (struct ohci_hcd *ohci)
>
> return ret;
> }
> +EXPORT_SYMBOL_GPL(ohci_init);
>
> /*-------------------------------------------------------------------------*/
>
> @@ -597,11 +592,11 @@ static int ohci_init (struct ohci_hcd *ohci)
> * resets USB and controller
> * enable interrupts
> */
> -static int ohci_run (struct ohci_hcd *ohci)
> +static int ohci_run(struct usb_hcd *hcd)
Why did you change the signature of this function? By doing so, you
just broke all the bus glue files. (Except for ohci_pci and
ohci_platform, which explicitly get fixed below.)
Since this function remains static, there's no reason to change it.
> {
> + struct ohci_hcd *ohci = hcd_to_ohci(hcd);
> u32 mask, val;
> int first = ohci->fminterval == 0;
> - struct usb_hcd *hcd = ohci_to_hcd(ohci);
>
> ohci->rh_state = OHCI_RH_HALTED;
>
> @@ -767,7 +762,37 @@ retry:
>
> return 0;
> }
> +/*------------------------------------------------------------------------*/
> +
> +/* ohci generic function for all OHCI bus glue */
> +
> +static int ohci_setup(struct usb_hcd *hcd)
> +{
> + struct ohci_hcd *ohci = hcd_to_ohci(hcd);
> + int retval;
> +
> + ohci->sbrn = HCD_USB11;
What is this doing here? Why did you add this "sbrn" member to struct
ohci_hcd?
> +
> + /* data structure init */
> + retval = ohci_init(ohci);
> + if (retval)
> + return retval;
> + ohci_usb_reset(ohci);
Why is this call here? Doesn't ohci_init() already call
ohci_usb_reset()?
> + return 0;
> +}
>
> +static int ohci_start(struct usb_hcd *hcd)
> +{
> + struct ohci_hcd *ohci = hcd_to_ohci(hcd);
> + int ret;
There should be a blank line between the declarations and the
executable statements.
> + ret = ohci_run(hcd);
> + if (ret < 0) {
> + ohci_err(ohci, "can't start\n");
> + ohci_stop(hcd);
> + }
> + return ret;
> +}
> +/*-------------------------------------------------------------------------*/
> /*-------------------------------------------------------------------------*/
You should not duplicate this comment line.
> diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
> index 951514e..0b34b59 100644
> --- a/drivers/usb/host/ohci-pci.c
> +++ b/drivers/usb/host/ohci-pci.c
> @@ -288,7 +288,7 @@ static int ohci_pci_start (struct usb_hcd *hcd)
> }
> #endif /* CONFIG_PM */
>
> - ret = ohci_run (ohci);
> + ret = ohci_run(hcd);
If you hadn't changed ohci_run(), this wouldn't be needed.
> if (ret < 0) {
> ohci_err (ohci, "can't start\n");
> ohci_stop (hcd);
> diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
> index c3e7287..545c657 100644
> --- a/drivers/usb/host/ohci-platform.c
> +++ b/drivers/usb/host/ohci-platform.c
> @@ -46,7 +46,7 @@ static int ohci_platform_start(struct usb_hcd *hcd)
> struct ohci_hcd *ohci = hcd_to_ohci(hcd);
> int err;
>
> - err = ohci_run(ohci);
> + err = ohci_run(hcd);
Likewise here.
> if (err < 0) {
> ohci_err(ohci, "can't start\n");
> ohci_stop(hcd);
> diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
> index d329914..455e9b1 100644
> --- a/drivers/usb/host/ohci.h
> +++ b/drivers/usb/host/ohci.h
> @@ -357,7 +357,6 @@ struct ohci_hcd {
> * I/O memory used to communicate with the HC (dma-consistent)
> */
> struct ohci_regs __iomem *regs;
> -
You shouldn't make unrelated changes, like removing this blank line or
the one below.
> /*
> * main memory used to communicate with the HC (dma-consistent).
> * hcd adds to schedule for a live hc any time, but removals finish
> @@ -373,7 +372,6 @@ struct ohci_hcd {
> struct ed *periodic [NUM_INTS]; /* shadow int_table */
>
> void (*start_hnp)(struct ohci_hcd *ohci);
> -
> /*
> * memory management for queue data structures
> */
> @@ -392,7 +390,7 @@ struct ohci_hcd {
> unsigned long next_statechange; /* suspend/resume */
> u32 fminterval; /* saved register */
> unsigned autostop:1; /* rh auto stopping/stopped */
> -
> + u8 sbrn;
> unsigned long flags; /* for HC bugs */
> #define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
> #define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */
> @@ -718,3 +716,29 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
> { return ohci_readl (hc, &hc->regs->roothub.status); }
> static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
> { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
> +
> +/* Declarations of things exported for use by ohci platform drivers */
> +
> +struct ohci_driver_overrides {
> + const char *product_desc;
> + size_t extra_priv_size;
> + int (*reset)(struct usb_hcd *hcd);
> +};
> +
> +extern void ohci_init_driver(struct hc_driver *drv,
> + const struct ohci_driver_overrides *over);
> +extern int ohci_init(struct ohci_hcd *ohci);
> +extern int ohci_restart(struct ohci_hcd *ohci);
> +#ifdef CONFIG_PM
> +extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
> +extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
> +#else
> +static inline int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
> +{
> + return 0;
> +}
> +static inline int ohci_resume(struct usb_hcd *hcd, bool hibernated)
> +{
> + return 0;
> +}
> +#endif
The #else part of this isn't needed, and I doubt very much that it
would work correctly if it was needed.
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver
[not found] <1365746856-7772-2-git-send-email-manjunath.goudar@linaro.org>
2013-05-07 9:50 ` [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-23 11:11 ` Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
` (2 more replies)
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
3 siblings, 3 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-23 11:11 UTC (permalink / raw)
To: linux-arm-kernel
This series of patches begins the process of splitting ohci-hcd up into
a core library module and independent pci driver modules.
Patch 1/3 prepares the way by exporting a few functions from ohci-hcd
and adding a new mechanism for platform-specific drivers to initialize
their hc_driver structures. This deserves to be done in the core
because almost all of the entries in these structures are pure
boilerplate -- practically none of the drivers need to override more
than three of the standard core values.
Patch 2/3 is part of separating the ohci pci host controller
driver from ohci-hcd host code.
Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
Patch 3/3 separate out ohci-pci into independent driver modules.
Manjunath Goudar (3):
USB: OHCI: prepare to make ohci-hcd a library module
USB: OHCI: Generic changes to make ohci-pci a separate driver
USB: OHCI: make ohci-pci a separate driver
drivers/usb/host/Kconfig | 4 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 129 +++++++++++++++++++++++++---------
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 152 ++++++++++++-----------------------------
drivers/usb/host/ohci-q.c | 8 ++-
drivers/usb/host/ohci.h | 21 ++++++
drivers/usb/host/pci-quirks.c | 14 ++++
drivers/usb/host/pci-quirks.h | 3 +
9 files changed, 189 insertions(+), 146 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-23 11:11 ` Manjunath Goudar
2013-05-23 14:27 ` Alan Stern
2013-05-23 11:11 ` [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2 siblings, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-23 11:11 UTC (permalink / raw)
To: linux-arm-kernel
This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
Added ohci_setip(() and ohci_start() routine for to start the generic
controller rather than each having its own idiosyncratic approach.
This allow to clean duplicated code in most of SOC driver
In V2:
-ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
-Adds the ohci_setup() and ohci_start() routine.
In V3:
-purpose of ohci_setup() and ohci_start() function description written in the patch
description.
-ohci_init() are not made non-static but now called beginning of the ohci_restart().
-ohci_run() signature change reverted back.
-unrelated changes removed.
-duplicate comment line removed.
-inline ohci_suspend() and ohci_resume() is not needed so removed from ohci.h file.
In V4:
-ohci-init() EXPORTed because it is called by all bus glue modules.
-ohci-setup() removed from 1/2 added into 2/2 patch.
In V5:
-Again ohci_setup() is added and EXPORTed because to replace the ohci_init() from
all bus glues.
-ohci_init() is not made non-static function.
In V6:
-ohci_init() call is removed from ohci_quirk_nec_worker(), because it is already called in ohci_restart().
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 103 +++++++++++++++++++++++++++++++++++++++----
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 7 ---
drivers/usb/host/ohci.h | 17 +++++++
4 files changed, 111 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9e6de95..13ebbb7 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
#include "pci-quirks.h"
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static int ohci_init (struct ohci_hcd *ohci);
static void ohci_stop (struct usb_hcd *hcd);
-
-#if defined(CONFIG_PM) || defined(CONFIG_PCI)
-static int ohci_restart (struct ohci_hcd *ohci);
-#endif
-
#ifdef CONFIG_PCI
static void sb800_prefetch(struct ohci_hcd *ohci, int on);
#else
@@ -768,6 +762,30 @@ retry:
return 0;
}
+/* ohci_setup routine for generic controller initialization */
+
+int ohci_setup(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+ return ohci_init(ohci);
+}
+EXPORT_SYMBOL_GPL(ohci_setup);
+
+/* ohci_start routine for generic controller start of all OHCI bus glue */
+static int ohci_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
@@ -949,12 +967,13 @@ static void ohci_stop (struct usb_hcd *hcd)
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
/* must not be called from interrupt context */
-static int ohci_restart (struct ohci_hcd *ohci)
+int ohci_restart(struct ohci_hcd *ohci)
{
int temp;
int i;
struct urb_priv *priv;
+ ohci_init(ohci);
spin_lock_irq(&ohci->lock);
ohci->rh_state = OHCI_RH_HALTED;
@@ -1008,12 +1027,13 @@ static int ohci_restart (struct ohci_hcd *ohci)
ohci_dbg(ohci, "restart complete\n");
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_restart);
#endif
#ifdef CONFIG_PM
-static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
@@ -1031,9 +1051,10 @@ static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_suspend);
-static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
+int ohci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int port;
@@ -1081,8 +1102,72 @@ static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_resume);
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+static const struct hc_driver ohci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_setup,
+ .start = ohci_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ohci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+EXPORT_SYMBOL_GPL(ohci_init_driver);
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 60ff422..2347ab8 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -176,7 +176,6 @@ __acquires(ohci->lock)
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ohci->lock);
- (void) ohci_init (ohci);
status = ohci_restart (ohci);
usb_root_hub_lost_power(hcd->self.root_hub);
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 951514e..2c27a5f 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -123,13 +123,6 @@ static void ohci_quirk_nec_worker(struct work_struct *work)
struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
int status;
- status = ohci_init(ohci);
- if (status != 0) {
- ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
- "ohci_init", status);
- return;
- }
-
status = ohci_restart(ohci);
if (status != 0)
ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d329914..3b58482 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -718,3 +718,20 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
{ return ohci_readl (hc, &hc->regs->roothub.status); }
static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over);
+extern int ohci_restart(struct ohci_hcd *ohci);
+extern int ohci_setup(struct usb_hcd *hcd);
+#ifdef CONFIG_PM
+extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-23 11:11 ` Manjunath Goudar
2013-05-23 13:26 ` Arnd Bergmann
2013-05-23 14:30 ` Alan Stern
2013-05-23 11:11 ` [RFC V6 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2 siblings, 2 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-23 11:11 UTC (permalink / raw)
To: linux-arm-kernel
Note that this changes is part of separating the ohci pci host controller
driver from ohci-hcd host code.
This contains :
-Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
-Passed "pci_dev" argument instead of "ohci_hcd" in sb800_prefetch()
function to avoid extra include file in pci-quirks.c.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 11 +----------
drivers/usb/host/ohci-pci.c | 13 -------------
drivers/usb/host/ohci-q.c | 6 ++++--
drivers/usb/host/pci-quirks.c | 12 ++++++++++++
drivers/usb/host/pci-quirks.h | 2 ++
5 files changed, 19 insertions(+), 25 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 13ebbb7..2490b81 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -80,15 +80,6 @@ static const char hcd_name [] = "ohci_hcd";
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
static void ohci_stop (struct usb_hcd *hcd);
-#ifdef CONFIG_PCI
-static void sb800_prefetch(struct ohci_hcd *ohci, int on);
-#else
-static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- return;
-}
-#endif
-
#include "ohci-hub.c"
#include "ohci-dbg.c"
@@ -1275,7 +1266,7 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_platform_driver
#endif
-#if !defined(PCI_DRIVER) && \
+#if !defined(PCI_DRIVER) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 2c27a5f..c3fa936 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -168,19 +168,6 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
return 0;
}
-static void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- struct pci_dev *pdev;
- u16 misc;
-
- pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
- pci_read_config_word(pdev, 0x50, &misc);
- if (on == 0)
- pci_write_config_word(pdev, 0x50, misc & 0xfcff);
- else
- pci_write_config_word(pdev, 0x50, misc | 0x0300);
-}
-
/* List of quirks for OHCI */
static const struct pci_device_id ohci_pci_quirks[] = {
{
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 88731b7..78e0095 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -41,6 +41,7 @@ finish_urb(struct ohci_hcd *ohci, struct urb *urb, int status)
__releases(ohci->lock)
__acquires(ohci->lock)
{
+ struct pci_dev *pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
// ASSERT (urb->hcpriv != 0);
urb_free_priv (ohci, urb->hcpriv);
@@ -55,7 +56,7 @@ __acquires(ohci->lock)
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_enable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 0);
+ sb800_prefetch(pdev, 0);
}
break;
case PIPE_INTERRUPT:
@@ -580,6 +581,7 @@ static void td_submit_urb (
struct urb *urb
) {
struct urb_priv *urb_priv = urb->hcpriv;
+ struct pci_dev *pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
@@ -689,7 +691,7 @@ static void td_submit_urb (
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_disable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 1);
+ sb800_prefetch(pdev, 1);
}
periodic = ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs++ == 0
&& ohci_to_hcd(ohci)->self.bandwidth_int_reqs == 0;
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 4c338ec..5f01540 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -91,6 +91,18 @@ static struct amd_chipset_info {
static DEFINE_SPINLOCK(amd_lock);
+void sb800_prefetch(struct pci_dev *pdev, int on)
+{
+ u16 misc;
+
+ pci_read_config_word(pdev, 0x50, &misc);
+ if (on == 0)
+ pci_write_config_word(pdev, 0x50, misc & 0xfcff);
+ else
+ pci_write_config_word(pdev, 0x50, misc | 0x0300);
+}
+EXPORT_SYMBOL_GPL(sb800_prefetch);
+
int usb_amd_find_chipset_info(void)
{
u8 rev = 0;
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index 7f69a39..7c5fbc1 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -11,11 +11,13 @@ void usb_amd_quirk_pll_enable(void);
bool usb_is_intel_switchable_xhci(struct pci_dev *pdev);
void usb_enable_xhci_ports(struct pci_dev *xhci_pdev);
void usb_disable_xhci_ports(struct pci_dev *xhci_pdev);
+void sb800_prefetch(struct pci_dev *pdev, int on);
#else
static inline void usb_amd_quirk_pll_disable(void) {}
static inline void usb_amd_quirk_pll_enable(void) {}
static inline void usb_amd_dev_put(void) {}
static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
+static inline void sb800_prefetch(struct pci_dev *pdev, int on) {}
#endif /* CONFIG_PCI */
#endif /* __LINUX_USB_PCI_QUIRKS_H */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-23 11:11 ` [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
@ 2013-05-23 11:11 ` Manjunath Goudar
2013-05-23 14:37 ` Alan Stern
2 siblings, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-23 11:11 UTC (permalink / raw)
To: linux-arm-kernel
This patch splits the PCI portion of ohci-hcd out into its
own separate driver module, called ohci-pci.
The major point of difficulty lies in ohci-pci's many vendor- and
device-specific workarounds. Some of them have to be applied before
calling ohci_start() some after, which necessitates a fair amount of
code motion. The other platform drivers require much smaller changes.
The complete sb800_prefetch() function moved to ohci-q.c,because its
only related to ohci-pci driver.
V2:
- few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
and rest of the generic code is written in ohci_start of ohci-hcd.c file.
V3:
- ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
V4:
-sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
-no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
-overrides renamed with pci_override,its giving proper meaning.
V5:
-sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
V6:
-sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
-Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 4 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 15 -----
drivers/usb/host/ohci-pci.c | 132 ++++++++++++++---------------------------
drivers/usb/host/ohci-q.c | 2 +
drivers/usb/host/ohci.h | 4 ++
drivers/usb/host/pci-quirks.c | 2 +
drivers/usb/host/pci-quirks.h | 1 +
8 files changed, 59 insertions(+), 104 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 64d7209..7e75387 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -377,7 +377,7 @@ config USB_FUSBH200_HCD
module will be called fusbh200-hcd.
config USB_OHCI_HCD
- tristate "OHCI HCD support"
+ tristate "OHCI HCD (USB 1.1) support"
depends on USB_ARCH_HAS_OHCI
select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
depends on USB_ISP1301 || !ARCH_LPC32XX
@@ -446,7 +446,7 @@ config USB_OHCI_HCD_PPC_OF
default USB_OHCI_HCD_PPC_OF_BE || USB_OHCI_HCD_PPC_OF_LE
config USB_OHCI_HCD_PCI
- bool "OHCI support for PCI-bus USB controllers"
+ tristate "OHCI support for PCI-bus USB controllers"
depends on PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
default y
select USB_OHCI_LITTLE_ENDIAN
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 661c558..2214ded 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -42,7 +42,10 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
+
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
+
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 2490b81..36fc3f7 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1166,11 +1166,6 @@ MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
-#ifdef CONFIG_PCI
-#include "ohci-pci.c"
-#define PCI_DRIVER ohci_pci_driver
-#endif
-
#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
#include "ohci-sa1111.c"
#define SA1111_DRIVER ohci_hcd_sa1111_driver
@@ -1341,12 +1336,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_sa1111;
#endif
-#ifdef PCI_DRIVER
- retval = pci_register_driver(&PCI_DRIVER);
- if (retval < 0)
- goto error_pci;
-#endif
-
#ifdef SM501_OHCI_DRIVER
retval = platform_driver_register(&SM501_OHCI_DRIVER);
if (retval < 0)
@@ -1440,10 +1429,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&SM501_OHCI_DRIVER);
error_sm501:
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
- error_pci:
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
error_sa1111:
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index c3fa936..ea088c1 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -14,12 +14,19 @@
* This file is licenced under the GPL.
*/
-#ifndef CONFIG_PCI
-#error "This file is PCI bus glue. CONFIG_PCI must be defined."
-#endif
-
-#include <linux/pci.h>
#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+#include "pci-quirks.h"
+
+#define DRIVER_DESC "OHCI PCI platform driver"
+
+static const char hcd_name[] = "ohci-pci";
/*-------------------------------------------------------------------------*/
@@ -229,10 +236,10 @@ static const struct pci_device_id ohci_pci_quirks[] = {
static int ohci_pci_reset (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
int ret = 0;
if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
const struct pci_device_id *quirk_id;
quirk_id = pci_match_id(ohci_pci_quirks, pdev);
@@ -242,94 +249,24 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
ret = quirk(hcd);
}
}
- if (ret == 0) {
- ohci_hcd_init (ohci);
- return ohci_init (ohci);
- }
- return ret;
-}
-
-
-static int ohci_pci_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
-#ifdef CONFIG_PM /* avoid warnings about unused pdev */
- if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
-
- /* RWC may not be set for add-in PCI cards, since boot
- * firmware probably ignored them. This transfers PCI
- * PM wakeup capabilities.
- */
- if (device_can_wakeup(&pdev->dev))
- ohci->hc_control |= OHCI_CTRL_RWC;
- }
-#endif /* CONFIG_PM */
-
- ret = ohci_run (ohci);
- if (ret < 0) {
- ohci_err (ohci, "can't start\n");
- ohci_stop (hcd);
- }
+ if (ret == 0)
+ ohci_setup(hcd);
+ /*
+ * After ohci setup RWC may not be set for add-in PCI cards.
+ * This transfers PCI PM wakeup capabilities.
+ */
+ if (device_can_wakeup(&pdev->dev))
+ ohci->hc_control |= OHCI_CTRL_RWC;
return ret;
}
+static struct hc_driver __read_mostly ohci_pci_hc_driver;
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_MEMORY | HCD_USB11,
-
- /*
- * basic lifecycle operations
- */
+static const struct ohci_driver_overrides pci_overrides __initconst = {
+ .product_desc = "OHCI PCI host controller",
.reset = ohci_pci_reset,
- .start = ohci_pci_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
-#ifdef CONFIG_PM
- .pci_suspend = ohci_suspend,
- .pci_resume = ohci_resume,
-#endif
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ohci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ohci_hub_status_data,
- .hub_control = ohci_hub_control,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
};
-/*-------------------------------------------------------------------------*/
-
-
static const struct pci_device_id pci_ids [] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
@@ -357,3 +294,24 @@ static struct pci_driver ohci_pci_driver = {
},
#endif
};
+
+static int __init ohci_pci_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_pci_hc_driver, &pci_overrides);
+ return pci_register_driver(&ohci_pci_driver);
+}
+module_init(ohci_pci_init);
+
+static void __exit ohci_pci_cleanup(void)
+{
+ pci_unregister_driver(&ohci_pci_driver);
+}
+module_exit(ohci_pci_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 78e0095..0ed8187 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -9,6 +9,8 @@
#include <linux/irq.h>
#include <linux/slab.h>
+#include "ohci.h"
+#include "pci-quirks.h"
static void urb_free_priv (struct ohci_hcd *hc, urb_priv_t *urb_priv)
{
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 3b58482..ecc471a 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -12,6 +12,9 @@
* __leXX (normally) or __beXX (given OHCI_BIG_ENDIAN), depending on the
* host controller implementation.
*/
+#ifndef __USB_HOST_OHCI_H
+#define __USB_HOST_OHCI_H
+
typedef __u32 __bitwise __hc32;
typedef __u16 __bitwise __hc16;
@@ -735,3 +738,4 @@ extern int ohci_setup(struct usb_hcd *hcd);
extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
#endif
+#endif
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 5f01540..112c85f 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -17,6 +17,8 @@
#include <linux/export.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
#include "pci-quirks.h"
#include "xhci-ext-caps.h"
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index 7c5fbc1..ba4d76b 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -1,6 +1,7 @@
#ifndef __LINUX_USB_PCI_QUIRKS_H
#define __LINUX_USB_PCI_QUIRKS_H
+struct ohci_hcd;
#ifdef CONFIG_PCI
void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-23 11:11 ` [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
@ 2013-05-23 13:26 ` Arnd Bergmann
2013-05-23 14:30 ` Alan Stern
1 sibling, 0 replies; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-23 13:26 UTC (permalink / raw)
To: linux-arm-kernel
On Thursday 23 May 2013, Manjunath Goudar wrote:
> @@ -1275,7 +1266,7 @@ MODULE_LICENSE ("GPL");
> #define PLATFORM_DRIVER ohci_platform_driver
> #endif
>
> -#if !defined(PCI_DRIVER) && \
> +#if !defined(PCI_DRIVER) && \
> !defined(PLATFORM_DRIVER) && \
> !defined(OMAP1_PLATFORM_DRIVER) && \
> !defined(OMAP3_PLATFORM_DRIVER) && \
This part didn't really belong here, otherwise the patch looks right to me.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-23 11:11 ` [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-23 14:27 ` Alan Stern
0 siblings, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-23 14:27 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 23 May 2013, Manjunath Goudar wrote:
> This patch prepares ohci-hcd for being split up into a core
> library and separate platform driver modules. A generic
> ohci_hc_driver structure is created, containing all the "standard"
> values, and a new mechanism is added whereby a driver module can
> specify a set of overrides to those values. In addition the
> ohci_restart(),ohci_suspend() and ohci_resume() routines need
> to be EXPORTed for use by the drivers.
>
> Added ohci_setip(() and ohci_start() routine for to start the generic
> controller rather than each having its own idiosyncratic approach.
> This allow to clean duplicated code in most of SOC driver
This patch looks good.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-23 11:11 ` [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
2013-05-23 13:26 ` Arnd Bergmann
@ 2013-05-23 14:30 ` Alan Stern
1 sibling, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-23 14:30 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 23 May 2013, Manjunath Goudar wrote:
> Note that this changes is part of separating the ohci pci host controller
> driver from ohci-hcd host code.
> This contains :
> -Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
> and EXPORTed, this is part of the effort to move the ohci pci related
> code to generic pci code.
> -Passed "pci_dev" argument instead of "ohci_hcd" in sb800_prefetch()
> function to avoid extra include file in pci-quirks.c.
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index 13ebbb7..2490b81 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -1275,7 +1266,7 @@ MODULE_LICENSE ("GPL");
> #define PLATFORM_DRIVER ohci_platform_driver
> #endif
>
> -#if !defined(PCI_DRIVER) && \
> +#if !defined(PCI_DRIVER) && \
> !defined(PLATFORM_DRIVER) && \
> !defined(OMAP1_PLATFORM_DRIVER) && \
> !defined(OMAP3_PLATFORM_DRIVER) && \
As Arnd mentioned, this doesn't belong here.
> diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
> index 88731b7..78e0095 100644
> --- a/drivers/usb/host/ohci-q.c
> +++ b/drivers/usb/host/ohci-q.c
> @@ -41,6 +41,7 @@ finish_urb(struct ohci_hcd *ohci, struct urb *urb, int status)
> __releases(ohci->lock)
> __acquires(ohci->lock)
> {
> + struct pci_dev *pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
You shouldn't call to_pci_dev(). At this point you don't know if the
controller is a PCI device or not. Instead, just do
struct device *dev = ohci_to_hcd(ohci)->self.controller;
Then in sb800_prefetch(), where it makes sense, you can call
to_pci_dev().
> @@ -580,6 +581,7 @@ static void td_submit_urb (
> struct urb *urb
> ) {
> struct urb_priv *urb_priv = urb->hcpriv;
> + struct pci_dev *pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
Same thing here.
Otherwise this is okay.
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-23 11:11 ` [RFC V6 PATCH 3/3] USB: OHCI: " Manjunath Goudar
@ 2013-05-23 14:37 ` Alan Stern
2013-05-23 17:01 ` Arnd Bergmann
0 siblings, 1 reply; 36+ messages in thread
From: Alan Stern @ 2013-05-23 14:37 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 23 May 2013, Manjunath Goudar wrote:
> This patch splits the PCI portion of ohci-hcd out into its
> own separate driver module, called ohci-pci.
>
> The major point of difficulty lies in ohci-pci's many vendor- and
> device-specific workarounds. Some of them have to be applied before
> calling ohci_start() some after, which necessitates a fair amount of
> code motion. The other platform drivers require much smaller changes.
>
> The complete sb800_prefetch() function moved to ohci-q.c,because its
> only related to ohci-pci driver.
>
> V2:
> - few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
> and rest of the generic code is written in ohci_start of ohci-hcd.c file.
> V3:
> - ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
>
> V4:
> -sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
> -no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
> -overrides renamed with pci_override,its giving proper meaning.
>
> V5:
> -sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
>
> V6:
> -sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
> -Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
This patch has a lot of extra stuff in it. It looks like you forgot to
undo a bunch of things from the previous version, things that are no
longer needed.
As I said before, you really need to proofread your patches before
emailing them. Don't rely on other people to find your mistakes.
Also, you left out one thing that should still be here. What happened
to the part about changing
#if !defined(PCI_DRIVER) && \
to
#if !ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
?
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-23 14:37 ` Alan Stern
@ 2013-05-23 17:01 ` Arnd Bergmann
2013-05-23 17:37 ` Alan Stern
0 siblings, 1 reply; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-23 17:01 UTC (permalink / raw)
To: linux-arm-kernel
On Thursday 23 May 2013, Alan Stern wrote:
> On Thu, 23 May 2013, Manjunath Goudar wrote:
> Also, you left out one thing that should still be here. What happened
> to the part about changing
>
> #if !defined(PCI_DRIVER) && \
>
> to
>
> #if !ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
>
This section of the driver is gone now since 86510bb248 "USB: OHCI:
clarify Kconfig dependencies", so the change is no longer needed.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-23 17:01 ` Arnd Bergmann
@ 2013-05-23 17:37 ` Alan Stern
2013-05-23 17:42 ` Arnd Bergmann
0 siblings, 1 reply; 36+ messages in thread
From: Alan Stern @ 2013-05-23 17:37 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 23 May 2013, Arnd Bergmann wrote:
> On Thursday 23 May 2013, Alan Stern wrote:
> > On Thu, 23 May 2013, Manjunath Goudar wrote:
>
> > Also, you left out one thing that should still be here. What happened
> > to the part about changing
> >
> > #if !defined(PCI_DRIVER) && \
> >
> > to
> >
> > #if !ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
> >
>
> This section of the driver is gone now since 86510bb248 "USB: OHCI:
> clarify Kconfig dependencies", so the change is no longer needed.
I don't know what tree you're referring to. That commit is not present
in Greg's usb-linus or usb-next branches. The usb-next branch is what
I use for new development.
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V6 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-23 17:37 ` Alan Stern
@ 2013-05-23 17:42 ` Arnd Bergmann
0 siblings, 0 replies; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-23 17:42 UTC (permalink / raw)
To: linux-arm-kernel
On Thursday 23 May 2013, Alan Stern wrote:
> > >
> >
> > This section of the driver is gone now since 86510bb248 "USB: OHCI:
> > clarify Kconfig dependencies", so the change is no longer needed.
>
> I don't know what tree you're referring to. That commit is not present
> in Greg's usb-linus or usb-next branches. The usb-next branch is what
> I use for new development.
Sorry, my mistake. I had looked at a temporary tree based on linux-next,
and I thought that Greg had applied my patch and put it into usb-next,
but instead it's a patch I had sitting on the branch I used for build
testing. I have not yet submitted that one again, and I'm sure that
Manjunath doesn't have it on his machine, so your comment still applies.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver
[not found] <1365746856-7772-2-git-send-email-manjunath.goudar@linaro.org>
2013-05-07 9:50 ` [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-27 12:25 ` Manjunath Goudar
2013-05-27 12:25 ` [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
` (3 more replies)
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
3 siblings, 4 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-27 12:25 UTC (permalink / raw)
To: linux-arm-kernel
This series of patches begins the process of splitting ohci-hcd up into
a core library module and independent pci driver modules.
Patch 1/3 prepares the way by exporting a few functions from ohci-hcd
and adding a new mechanism for platform-specific drivers to initialize
their hc_driver structures. This deserves to be done in the core
because almost all of the entries in these structures are pure
boilerplate -- practically none of the drivers need to override more
than three of the standard core values.
Patch 2/3 is part of separating the ohci pci host controller
driver from ohci-hcd host code.
Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
Patch 3/3 separate out ohci-pci into independent driver modules.
Manjunath Goudar (3):
USB: OHCI: prepare to make ohci-hcd a library module
USB: OHCI: Generic changes to make ohci-pci a separate driver
USB: OHCI: make ohci-pci a separate driver
drivers/usb/host/Kconfig | 4 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 132 +++++++++++++++++++++++++----------
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 152 ++++++++++++-----------------------------
drivers/usb/host/ohci-q.c | 6 +-
drivers/usb/host/ohci.h | 17 +++++
drivers/usb/host/pci-quirks.c | 13 ++++
drivers/usb/host/pci-quirks.h | 2 +
9 files changed, 181 insertions(+), 149 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-27 12:25 ` Manjunath Goudar
2013-05-27 14:54 ` Alan Stern
2013-05-27 12:25 ` [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
` (2 subsequent siblings)
3 siblings, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-27 12:25 UTC (permalink / raw)
To: linux-arm-kernel
This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
Added ohci_setip(() and ohci_start() routine for to start the generic
controller rather than each having its own idiosyncratic approach.
This allow to clean duplicated code in most of SOC driver
In V2:
-ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
-Adds the ohci_setup() and ohci_start() routine.
In V3:
-purpose of ohci_setup() and ohci_start() function description written in the patch
description.
-ohci_init() are not made non-static but now called beginning of the ohci_restart().
-ohci_run() signature change reverted back.
-unrelated changes removed.
-duplicate comment line removed.
-inline ohci_suspend() and ohci_resume() is not needed so removed from ohci.h file.
In V4:
-ohci-init() EXPORTed because it is called by all bus glue modules.
-ohci-setup() removed from 1/2 added into 2/2 patch.
In V5:
-Again ohci_setup() is added and EXPORTed because to replace the ohci_init() from
all bus glues.
-ohci_init() is not made non-static function.
In V6:
-ohci_init() call is removed from ohci_quirk_nec_worker(), because it is already called in ohci_restart().
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 103 +++++++++++++++++++++++++++++++++++++++----
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 7 ---
drivers/usb/host/ohci.h | 17 +++++++
4 files changed, 111 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9e6de95..13ebbb7 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
#include "pci-quirks.h"
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static int ohci_init (struct ohci_hcd *ohci);
static void ohci_stop (struct usb_hcd *hcd);
-
-#if defined(CONFIG_PM) || defined(CONFIG_PCI)
-static int ohci_restart (struct ohci_hcd *ohci);
-#endif
-
#ifdef CONFIG_PCI
static void sb800_prefetch(struct ohci_hcd *ohci, int on);
#else
@@ -768,6 +762,30 @@ retry:
return 0;
}
+/* ohci_setup routine for generic controller initialization */
+
+int ohci_setup(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+ return ohci_init(ohci);
+}
+EXPORT_SYMBOL_GPL(ohci_setup);
+
+/* ohci_start routine for generic controller start of all OHCI bus glue */
+static int ohci_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
@@ -949,12 +967,13 @@ static void ohci_stop (struct usb_hcd *hcd)
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
/* must not be called from interrupt context */
-static int ohci_restart (struct ohci_hcd *ohci)
+int ohci_restart(struct ohci_hcd *ohci)
{
int temp;
int i;
struct urb_priv *priv;
+ ohci_init(ohci);
spin_lock_irq(&ohci->lock);
ohci->rh_state = OHCI_RH_HALTED;
@@ -1008,12 +1027,13 @@ static int ohci_restart (struct ohci_hcd *ohci)
ohci_dbg(ohci, "restart complete\n");
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_restart);
#endif
#ifdef CONFIG_PM
-static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
@@ -1031,9 +1051,10 @@ static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_suspend);
-static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
+int ohci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int port;
@@ -1081,8 +1102,72 @@ static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_resume);
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+static const struct hc_driver ohci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_setup,
+ .start = ohci_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ohci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+EXPORT_SYMBOL_GPL(ohci_init_driver);
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 60ff422..2347ab8 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -176,7 +176,6 @@ __acquires(ohci->lock)
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ohci->lock);
- (void) ohci_init (ohci);
status = ohci_restart (ohci);
usb_root_hub_lost_power(hcd->self.root_hub);
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 951514e..2c27a5f 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -123,13 +123,6 @@ static void ohci_quirk_nec_worker(struct work_struct *work)
struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
int status;
- status = ohci_init(ohci);
- if (status != 0) {
- ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
- "ohci_init", status);
- return;
- }
-
status = ohci_restart(ohci);
if (status != 0)
ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d329914..3b58482 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -718,3 +718,20 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
{ return ohci_readl (hc, &hc->regs->roothub.status); }
static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over);
+extern int ohci_restart(struct ohci_hcd *ohci);
+extern int ohci_setup(struct usb_hcd *hcd);
+#ifdef CONFIG_PM
+extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-27 12:25 ` [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-27 12:25 ` Manjunath Goudar
2013-05-27 14:55 ` Alan Stern
2013-05-27 12:25 ` [RFC V7 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2013-05-27 13:29 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Viresh Kumar
3 siblings, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-27 12:25 UTC (permalink / raw)
To: linux-arm-kernel
Note that this changes is part of separating the ohci pci host controller
driver from ohci-hcd host code.
This contains :
-Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
-Passed "device" argument instead of "ohci_hcd" in sb800_prefetch()
function to avoid extra include file in pci-quirks.c.
V2:
-Passed "device" argment instead of "pci_dev", then we use to_pci_dev()
to get the "pci_dev" structure.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 9 ---------
drivers/usb/host/ohci-pci.c | 13 -------------
drivers/usb/host/ohci-q.c | 6 ++++--
drivers/usb/host/pci-quirks.c | 13 +++++++++++++
drivers/usb/host/pci-quirks.h | 2 ++
5 files changed, 19 insertions(+), 24 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 13ebbb7..82f586a 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -80,15 +80,6 @@ static const char hcd_name [] = "ohci_hcd";
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
static void ohci_stop (struct usb_hcd *hcd);
-#ifdef CONFIG_PCI
-static void sb800_prefetch(struct ohci_hcd *ohci, int on);
-#else
-static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- return;
-}
-#endif
-
#include "ohci-hub.c"
#include "ohci-dbg.c"
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 2c27a5f..c3fa936 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -168,19 +168,6 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
return 0;
}
-static void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- struct pci_dev *pdev;
- u16 misc;
-
- pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
- pci_read_config_word(pdev, 0x50, &misc);
- if (on == 0)
- pci_write_config_word(pdev, 0x50, misc & 0xfcff);
- else
- pci_write_config_word(pdev, 0x50, misc | 0x0300);
-}
-
/* List of quirks for OHCI */
static const struct pci_device_id ohci_pci_quirks[] = {
{
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 88731b7..df4a670 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -41,6 +41,7 @@ finish_urb(struct ohci_hcd *ohci, struct urb *urb, int status)
__releases(ohci->lock)
__acquires(ohci->lock)
{
+ struct device *dev = ohci_to_hcd(ohci)->self.controller;
// ASSERT (urb->hcpriv != 0);
urb_free_priv (ohci, urb->hcpriv);
@@ -55,7 +56,7 @@ __acquires(ohci->lock)
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_enable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 0);
+ sb800_prefetch(dev, 0);
}
break;
case PIPE_INTERRUPT:
@@ -580,6 +581,7 @@ static void td_submit_urb (
struct urb *urb
) {
struct urb_priv *urb_priv = urb->hcpriv;
+ struct device *dev = ohci_to_hcd(ohci)->self.controller;
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
@@ -689,7 +691,7 @@ static void td_submit_urb (
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_disable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 1);
+ sb800_prefetch(dev, 1);
}
periodic = ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs++ == 0
&& ohci_to_hcd(ohci)->self.bandwidth_int_reqs == 0;
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 4c338ec..b9848e4 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -91,6 +91,19 @@ static struct amd_chipset_info {
static DEFINE_SPINLOCK(amd_lock);
+void sb800_prefetch(struct device *dev, int on)
+{
+ u16 misc;
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ pci_read_config_word(pdev, 0x50, &misc);
+ if (on == 0)
+ pci_write_config_word(pdev, 0x50, misc & 0xfcff);
+ else
+ pci_write_config_word(pdev, 0x50, misc | 0x0300);
+}
+EXPORT_SYMBOL_GPL(sb800_prefetch);
+
int usb_amd_find_chipset_info(void)
{
u8 rev = 0;
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index 7f69a39..4b8a209 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -11,11 +11,13 @@ void usb_amd_quirk_pll_enable(void);
bool usb_is_intel_switchable_xhci(struct pci_dev *pdev);
void usb_enable_xhci_ports(struct pci_dev *xhci_pdev);
void usb_disable_xhci_ports(struct pci_dev *xhci_pdev);
+void sb800_prefetch(struct device *dev, int on);
#else
static inline void usb_amd_quirk_pll_disable(void) {}
static inline void usb_amd_quirk_pll_enable(void) {}
static inline void usb_amd_dev_put(void) {}
static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
+static inline void sb800_prefetch(struct device *dev, int on) {}
#endif /* CONFIG_PCI */
#endif /* __LINUX_USB_PCI_QUIRKS_H */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-27 12:25 ` [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-27 12:25 ` [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
@ 2013-05-27 12:25 ` Manjunath Goudar
2013-05-27 14:58 ` Alan Stern
2013-05-27 20:38 ` Arnd Bergmann
2013-05-27 13:29 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Viresh Kumar
3 siblings, 2 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-27 12:25 UTC (permalink / raw)
To: linux-arm-kernel
This patch splits the PCI portion of ohci-hcd out into its
own separate driver module, called ohci-pci.
The major point of difficulty lies in ohci-pci's many vendor- and
device-specific workarounds. Some of them have to be applied before
calling ohci_start() some after, which necessitates a fair amount of
code motion. The other platform drivers require much smaller changes.
The complete sb800_prefetch() function moved to ohci-q.c,because its
only related to ohci-pci driver.
V2:
- few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
and rest of the generic code is written in ohci_start of ohci-hcd.c file.
V3:
- ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
V4:
-sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
-no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
-overrides renamed with pci_override,its giving proper meaning.
V5:
-sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
V6:
-sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
-Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
V7:
-Unrelated include file has been removed from ohci.h file.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 4 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 20 +------
drivers/usb/host/ohci-pci.c | 132 +++++++++++++++----------------------------
4 files changed, 51 insertions(+), 108 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 64d7209..7e75387 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -377,7 +377,7 @@ config USB_FUSBH200_HCD
module will be called fusbh200-hcd.
config USB_OHCI_HCD
- tristate "OHCI HCD support"
+ tristate "OHCI HCD (USB 1.1) support"
depends on USB_ARCH_HAS_OHCI
select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
depends on USB_ISP1301 || !ARCH_LPC32XX
@@ -446,7 +446,7 @@ config USB_OHCI_HCD_PPC_OF
default USB_OHCI_HCD_PPC_OF_BE || USB_OHCI_HCD_PPC_OF_LE
config USB_OHCI_HCD_PCI
- bool "OHCI support for PCI-bus USB controllers"
+ tristate "OHCI support for PCI-bus USB controllers"
depends on PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
default y
select USB_OHCI_LITTLE_ENDIAN
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 661c558..2214ded 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -42,7 +42,10 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
+
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
+
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 82f586a..4a83031 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1166,11 +1166,6 @@ MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
-#ifdef CONFIG_PCI
-#include "ohci-pci.c"
-#define PCI_DRIVER ohci_pci_driver
-#endif
-
#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
#include "ohci-sa1111.c"
#define SA1111_DRIVER ohci_hcd_sa1111_driver
@@ -1266,7 +1261,7 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_platform_driver
#endif
-#if !defined(PCI_DRIVER) && \
+#if !IS_ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \
@@ -1341,12 +1336,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_sa1111;
#endif
-#ifdef PCI_DRIVER
- retval = pci_register_driver(&PCI_DRIVER);
- if (retval < 0)
- goto error_pci;
-#endif
-
#ifdef SM501_OHCI_DRIVER
retval = platform_driver_register(&SM501_OHCI_DRIVER);
if (retval < 0)
@@ -1440,10 +1429,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&SM501_OHCI_DRIVER);
error_sm501:
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
- error_pci:
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
error_sa1111:
@@ -1508,9 +1493,6 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef SM501_OHCI_DRIVER
platform_driver_unregister(&SM501_OHCI_DRIVER);
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
#endif
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index c3fa936..ea088c1 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -14,12 +14,19 @@
* This file is licenced under the GPL.
*/
-#ifndef CONFIG_PCI
-#error "This file is PCI bus glue. CONFIG_PCI must be defined."
-#endif
-
-#include <linux/pci.h>
#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+#include "pci-quirks.h"
+
+#define DRIVER_DESC "OHCI PCI platform driver"
+
+static const char hcd_name[] = "ohci-pci";
/*-------------------------------------------------------------------------*/
@@ -229,10 +236,10 @@ static const struct pci_device_id ohci_pci_quirks[] = {
static int ohci_pci_reset (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
int ret = 0;
if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
const struct pci_device_id *quirk_id;
quirk_id = pci_match_id(ohci_pci_quirks, pdev);
@@ -242,94 +249,24 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
ret = quirk(hcd);
}
}
- if (ret == 0) {
- ohci_hcd_init (ohci);
- return ohci_init (ohci);
- }
- return ret;
-}
-
-
-static int ohci_pci_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
-#ifdef CONFIG_PM /* avoid warnings about unused pdev */
- if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
-
- /* RWC may not be set for add-in PCI cards, since boot
- * firmware probably ignored them. This transfers PCI
- * PM wakeup capabilities.
- */
- if (device_can_wakeup(&pdev->dev))
- ohci->hc_control |= OHCI_CTRL_RWC;
- }
-#endif /* CONFIG_PM */
-
- ret = ohci_run (ohci);
- if (ret < 0) {
- ohci_err (ohci, "can't start\n");
- ohci_stop (hcd);
- }
+ if (ret == 0)
+ ohci_setup(hcd);
+ /*
+ * After ohci setup RWC may not be set for add-in PCI cards.
+ * This transfers PCI PM wakeup capabilities.
+ */
+ if (device_can_wakeup(&pdev->dev))
+ ohci->hc_control |= OHCI_CTRL_RWC;
return ret;
}
+static struct hc_driver __read_mostly ohci_pci_hc_driver;
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_MEMORY | HCD_USB11,
-
- /*
- * basic lifecycle operations
- */
+static const struct ohci_driver_overrides pci_overrides __initconst = {
+ .product_desc = "OHCI PCI host controller",
.reset = ohci_pci_reset,
- .start = ohci_pci_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
-#ifdef CONFIG_PM
- .pci_suspend = ohci_suspend,
- .pci_resume = ohci_resume,
-#endif
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ohci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ohci_hub_status_data,
- .hub_control = ohci_hub_control,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
};
-/*-------------------------------------------------------------------------*/
-
-
static const struct pci_device_id pci_ids [] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
@@ -357,3 +294,24 @@ static struct pci_driver ohci_pci_driver = {
},
#endif
};
+
+static int __init ohci_pci_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_pci_hc_driver, &pci_overrides);
+ return pci_register_driver(&ohci_pci_driver);
+}
+module_init(ohci_pci_init);
+
+static void __exit ohci_pci_cleanup(void)
+{
+ pci_unregister_driver(&ohci_pci_driver);
+}
+module_exit(ohci_pci_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
` (2 preceding siblings ...)
2013-05-27 12:25 ` [RFC V7 PATCH 3/3] USB: OHCI: " Manjunath Goudar
@ 2013-05-27 13:29 ` Viresh Kumar
3 siblings, 0 replies; 36+ messages in thread
From: Viresh Kumar @ 2013-05-27 13:29 UTC (permalink / raw)
To: linux-arm-kernel
On 27 May 2013 17:55, Manjunath Goudar <manjunath.goudar@linaro.org> wrote:
> This series of patches begins the process of splitting ohci-hcd up into
> a core library module and independent pci driver modules.
>
> Patch 1/3 prepares the way by exporting a few functions from ohci-hcd
> and adding a new mechanism for platform-specific drivers to initialize
> their hc_driver structures. This deserves to be done in the core
> because almost all of the entries in these structures are pure
> boilerplate -- practically none of the drivers need to override more
> than three of the standard core values.
>
> Patch 2/3 is part of separating the ohci pci host controller
> driver from ohci-hcd host code.
> Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
> and EXPORTed, this is part of the effort to move the ohci pci related
> code to generic pci code.
>
> Patch 3/3 separate out ohci-pci into independent driver modules.
You need to tell everybody what has changed from V6 to V7..
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-27 12:25 ` [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-27 14:54 ` Alan Stern
0 siblings, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-27 14:54 UTC (permalink / raw)
To: linux-arm-kernel
On Mon, 27 May 2013, Manjunath Goudar wrote:
> This patch prepares ohci-hcd for being split up into a core
> library and separate platform driver modules. A generic
> ohci_hc_driver structure is created, containing all the "standard"
> values, and a new mechanism is added whereby a driver module can
> specify a set of overrides to those values. In addition the
> ohci_restart(),ohci_suspend() and ohci_resume() routines need
> to be EXPORTed for use by the drivers.
>
> Added ohci_setip(() and ohci_start() routine for to start the generic
> controller rather than each having its own idiosyncratic approach.
> This allow to clean duplicated code in most of SOC driver
>
> In V2:
> -ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
> -Adds the ohci_setup() and ohci_start() routine.
There's one thing we forgot about:
> +/* ohci_setup routine for generic controller initialization */
> +
> +int ohci_setup(struct usb_hcd *hcd)
> +{
> + struct ohci_hcd *ohci = hcd_to_ohci(hcd);
> +
> + return ohci_init(ohci);
> +}
> +EXPORT_SYMBOL_GPL(ohci_setup);
This routine needs to call ohci_hcd_init() before ohci_init().
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-27 12:25 ` [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
@ 2013-05-27 14:55 ` Alan Stern
0 siblings, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-27 14:55 UTC (permalink / raw)
To: linux-arm-kernel
On Mon, 27 May 2013, Manjunath Goudar wrote:
> Note that this changes is part of separating the ohci pci host controller
> driver from ohci-hcd host code.
> This contains :
> -Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
> and EXPORTed, this is part of the effort to move the ohci pci related
> code to generic pci code.
> -Passed "device" argument instead of "ohci_hcd" in sb800_prefetch()
> function to avoid extra include file in pci-quirks.c.
>
> V2:
> -Passed "device" argment instead of "pci_dev", then we use to_pci_dev()
> to get the "pci_dev" structure.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-27 12:25 ` [RFC V7 PATCH 3/3] USB: OHCI: " Manjunath Goudar
@ 2013-05-27 14:58 ` Alan Stern
2013-05-27 20:38 ` Arnd Bergmann
1 sibling, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-27 14:58 UTC (permalink / raw)
To: linux-arm-kernel
On Mon, 27 May 2013, Manjunath Goudar wrote:
> This patch splits the PCI portion of ohci-hcd out into its
> own separate driver module, called ohci-pci.
>
> The major point of difficulty lies in ohci-pci's many vendor- and
> device-specific workarounds. Some of them have to be applied before
> calling ohci_start() some after, which necessitates a fair amount of
> code motion. The other platform drivers require much smaller changes.
>
> The complete sb800_prefetch() function moved to ohci-q.c,because its
> only related to ohci-pci driver.
>
> V2:
> - few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
> and rest of the generic code is written in ohci_start of ohci-hcd.c file.
> V3:
> - ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
>
> V4:
> -sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
> -no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
> -overrides renamed with pci_override,its giving proper meaning.
>
> V5:
> -sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
>
> V6:
> -sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
> -Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
>
> V7:
> -Unrelated include file has been removed from ohci.h file.
One tiny mistake still remains...
> @@ -242,94 +249,24 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
> ret = quirk(hcd);
> }
> }
> - if (ret == 0) {
> - ohci_hcd_init (ohci);
> - return ohci_init (ohci);
> - }
...
> + if (ret == 0)
> + ohci_setup(hcd);
This should say
ret = ohci_setup(hcd);
so that errors in ohci_setup() won't be ignored.
> + /*
> + * After ohci setup RWC may not be set for add-in PCI cards.
> + * This transfers PCI PM wakeup capabilities.
> + */
> + if (device_can_wakeup(&pdev->dev))
> + ohci->hc_control |= OHCI_CTRL_RWC;
> return ret;
> }
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [RFC V7 PATCH 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-27 12:25 ` [RFC V7 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2013-05-27 14:58 ` Alan Stern
@ 2013-05-27 20:38 ` Arnd Bergmann
1 sibling, 0 replies; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-27 20:38 UTC (permalink / raw)
To: linux-arm-kernel
On Monday 27 May 2013, Manjunath Goudar wrote:
> This patch splits the PCI portion of ohci-hcd out into its
> own separate driver module, called ohci-pci.
>
> The major point of difficulty lies in ohci-pci's many vendor- and
> device-specific workarounds. Some of them have to be applied before
> calling ohci_start() some after, which necessitates a fair amount of
> code motion. The other platform drivers require much smaller changes.
>
> The complete sb800_prefetch() function moved to ohci-q.c,because its
> only related to ohci-pci driver.
I just gave this a little test run in qemu and on my server.
> @@ -446,7 +446,7 @@ config USB_OHCI_HCD_PPC_OF
> default USB_OHCI_HCD_PPC_OF_BE || USB_OHCI_HCD_PPC_OF_LE
>
> config USB_OHCI_HCD_PCI
> - bool "OHCI support for PCI-bus USB controllers"
> + tristate "OHCI support for PCI-bus USB controllers"
> depends on PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
> default y
> select USB_OHCI_LITTLE_ENDIAN
There is a preexisting bug in this symbol: USB_OHCI_HCD_PCI was previously
unused, and has a bogus 'depends' line, which causes it to not be selectable
on anything but PPC.
You have to change this to only 'depends on PCI'.
> }
> - if (ret == 0) {
> - ohci_hcd_init (ohci);
> - return ohci_init (ohci);
> - }
> - return ret;
> -}
I found that the call to ohci_hcd_init() that is removed here is not getting
added in any other place, which caused a NULL pointer dereference the first
time we actually try to use the driver.
Adding the call back into the new ohci_setup function makes it work again.
Please fold the patch below into your patch, unless Alan discovers something
wrong with it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index f948e8f..eef6dc5 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -454,7 +454,7 @@ config USB_OHCI_HCD_PPC_OF
config USB_OHCI_HCD_PCI
tristate "OHCI support for PCI-bus USB controllers"
- depends on PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
+ depends on PCI
default y
select USB_OHCI_CORE
select USB_OHCI_LITTLE_ENDIAN
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 3da8c3a..5601139 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -763,6 +763,8 @@ int ohci_setup(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ ohci_hcd_init(ohci);
+
return ohci_init(ohci);
}
EXPORT_SYMBOL_GPL(ohci_setup);
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index ea088c1..3133354 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -250,7 +250,7 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
}
}
if (ret == 0)
- ohci_setup(hcd);
+ ret = ohci_setup(hcd);
/*
* After ohci setup RWC may not be set for add-in PCI cards.
* This transfers PCI PM wakeup capabilities.
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
[not found] <1365746856-7772-2-git-send-email-manjunath.goudar@linaro.org>
` (2 preceding siblings ...)
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
@ 2013-05-28 13:04 ` Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
` (3 more replies)
3 siblings, 4 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-28 13:04 UTC (permalink / raw)
To: linux-arm-kernel
This series of patches begins the process of splitting ohci-hcd up into
a core library module and independent pci driver modules.
Patch 1/3 prepares the way by exporting a few functions from ohci-hcd
and adding a new mechanism for platform-specific drivers to initialize
their hc_driver structures. This deserves to be done in the core
because almost all of the entries in these structures are pure
boilerplate -- practically none of the drivers need to override more
than three of the standard core values.
Change from V7 to V8
ohci_hcd_init() is called by ohci_setup() to make generic ohci
initialization in all ohci drivers.
Patch 2/3 is part of separating the ohci pci host controller
driver from ohci-hcd host code.
Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
Change from V7 to V8
no change.
Patch 3/3 separate out ohci-pci into independent driver modules.
Change from V7 to V8
USB_OHCI_HCD_PCI symbol no longer dependence on STB03xxx, PPC_MPC52xx and
USB_OHCI_HCD_PPC_OF that's what removed.
Manjunath Goudar (3):
USB: OHCI: prepare to make ohci-hcd a library module
USB: OHCI: Generic changes to make ohci-pci a separate driver
USB: OHCI: make ohci-pci a separate driver
drivers/usb/host/Kconfig | 6 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 134 ++++++++++++++++++++++++++----------
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 151 ++++++++++++-----------------------------
drivers/usb/host/ohci-q.c | 6 +-
drivers/usb/host/ohci.h | 17 +++++
drivers/usb/host/pci-quirks.c | 13 ++++
drivers/usb/host/pci-quirks.h | 2 +
9 files changed, 184 insertions(+), 149 deletions(-)
--
1.7.9.5
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 1/3] USB: OHCI: prepare to make ohci-hcd a library module
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
@ 2013-05-28 13:04 ` Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
` (2 subsequent siblings)
3 siblings, 0 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-28 13:04 UTC (permalink / raw)
To: linux-arm-kernel
This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
Added ohci_setip(() and ohci_start() routine for to start the generic
controller rather than each having its own idiosyncratic approach.
This allow to clean duplicated code in most of SOC driver
In V2:
-ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
-Adds the ohci_setup() and ohci_start() routine.
In V3:
-purpose of ohci_setup() and ohci_start() function description written in the patch
description.
-ohci_init() are not made non-static but now called beginning of the ohci_restart().
-ohci_run() signature change reverted back.
-unrelated changes removed.
-duplicate comment line removed.
-inline ohci_suspend() and ohci_resume() is not needed so removed from ohci.h file.
In V4:
-ohci-init() EXPORTed because it is called by all bus glue modules.
-ohci-setup() removed from 1/2 added into 2/2 patch.
In V5:
-Again ohci_setup() is added and EXPORTed because to replace the ohci_init() from
all bus glues.
-ohci_init() is not made non-static function.
In V6:
-ohci_init() call is removed from ohci_quirk_nec_worker(), because it is already called in ohci_restart().
In V8:
-ohci_hcd_init() is called by ohci_setup() to make generic ohci initialization in all ohci drivers.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 105 +++++++++++++++++++++++++++++++++++++++----
drivers/usb/host/ohci-hub.c | 1 -
drivers/usb/host/ohci-pci.c | 7 ---
drivers/usb/host/ohci.h | 17 +++++++
4 files changed, 113 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9e6de95..2815359 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
#include "pci-quirks.h"
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static int ohci_init (struct ohci_hcd *ohci);
static void ohci_stop (struct usb_hcd *hcd);
-
-#if defined(CONFIG_PM) || defined(CONFIG_PCI)
-static int ohci_restart (struct ohci_hcd *ohci);
-#endif
-
#ifdef CONFIG_PCI
static void sb800_prefetch(struct ohci_hcd *ohci, int on);
#else
@@ -768,6 +762,32 @@ retry:
return 0;
}
+/* ohci_setup routine for generic controller initialization */
+
+int ohci_setup(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+ ohci_hcd_init(ohci);
+
+ return ohci_init(ohci);
+}
+EXPORT_SYMBOL_GPL(ohci_setup);
+
+/* ohci_start routine for generic controller start of all OHCI bus glue */
+static int ohci_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
@@ -949,12 +969,13 @@ static void ohci_stop (struct usb_hcd *hcd)
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
/* must not be called from interrupt context */
-static int ohci_restart (struct ohci_hcd *ohci)
+int ohci_restart(struct ohci_hcd *ohci)
{
int temp;
int i;
struct urb_priv *priv;
+ ohci_init(ohci);
spin_lock_irq(&ohci->lock);
ohci->rh_state = OHCI_RH_HALTED;
@@ -1008,12 +1029,13 @@ static int ohci_restart (struct ohci_hcd *ohci)
ohci_dbg(ohci, "restart complete\n");
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_restart);
#endif
#ifdef CONFIG_PM
-static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
@@ -1031,9 +1053,10 @@ static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_suspend);
-static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
+int ohci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int port;
@@ -1081,8 +1104,72 @@ static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_resume);
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+static const struct hc_driver ohci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_setup,
+ .start = ohci_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ohci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+EXPORT_SYMBOL_GPL(ohci_init_driver);
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 60ff422..2347ab8 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -176,7 +176,6 @@ __acquires(ohci->lock)
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ohci->lock);
- (void) ohci_init (ohci);
status = ohci_restart (ohci);
usb_root_hub_lost_power(hcd->self.root_hub);
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 951514e..2c27a5f 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -123,13 +123,6 @@ static void ohci_quirk_nec_worker(struct work_struct *work)
struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
int status;
- status = ohci_init(ohci);
- if (status != 0) {
- ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
- "ohci_init", status);
- return;
- }
-
status = ohci_restart(ohci);
if (status != 0)
ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d329914..3b58482 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -718,3 +718,20 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
{ return ohci_readl (hc, &hc->regs->roothub.status); }
static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over);
+extern int ohci_restart(struct ohci_hcd *ohci);
+extern int ohci_setup(struct usb_hcd *hcd);
+#ifdef CONFIG_PM
+extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#endif
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [PATCH V8 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
@ 2013-05-28 13:04 ` Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 3/3] USB: OHCI: " Manjunath Goudar
2013-05-28 20:11 ` [PATCH V8 0/3] USB: OHCI: Start splitting up the driver Arnd Bergmann
3 siblings, 0 replies; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-28 13:04 UTC (permalink / raw)
To: linux-arm-kernel
Note that this changes is part of separating the ohci pci host controller
driver from ohci-hcd host code.
This contains :
-Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
-Passed "device" argument instead of "ohci_hcd" in sb800_prefetch()
function to avoid extra include file in pci-quirks.c.
V2:
-Passed "device" argment instead of "pci_dev", then we use to_pci_dev()
to get the "pci_dev" structure.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/ohci-hcd.c | 9 ---------
drivers/usb/host/ohci-pci.c | 13 -------------
drivers/usb/host/ohci-q.c | 6 ++++--
drivers/usb/host/pci-quirks.c | 13 +++++++++++++
drivers/usb/host/pci-quirks.h | 2 ++
5 files changed, 19 insertions(+), 24 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 2815359..194ae4a 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -80,15 +80,6 @@ static const char hcd_name [] = "ohci_hcd";
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
static void ohci_stop (struct usb_hcd *hcd);
-#ifdef CONFIG_PCI
-static void sb800_prefetch(struct ohci_hcd *ohci, int on);
-#else
-static inline void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- return;
-}
-#endif
-
#include "ohci-hub.c"
#include "ohci-dbg.c"
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 2c27a5f..c3fa936 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -168,19 +168,6 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
return 0;
}
-static void sb800_prefetch(struct ohci_hcd *ohci, int on)
-{
- struct pci_dev *pdev;
- u16 misc;
-
- pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
- pci_read_config_word(pdev, 0x50, &misc);
- if (on == 0)
- pci_write_config_word(pdev, 0x50, misc & 0xfcff);
- else
- pci_write_config_word(pdev, 0x50, misc | 0x0300);
-}
-
/* List of quirks for OHCI */
static const struct pci_device_id ohci_pci_quirks[] = {
{
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 88731b7..df4a670 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -41,6 +41,7 @@ finish_urb(struct ohci_hcd *ohci, struct urb *urb, int status)
__releases(ohci->lock)
__acquires(ohci->lock)
{
+ struct device *dev = ohci_to_hcd(ohci)->self.controller;
// ASSERT (urb->hcpriv != 0);
urb_free_priv (ohci, urb->hcpriv);
@@ -55,7 +56,7 @@ __acquires(ohci->lock)
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_enable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 0);
+ sb800_prefetch(dev, 0);
}
break;
case PIPE_INTERRUPT:
@@ -580,6 +581,7 @@ static void td_submit_urb (
struct urb *urb
) {
struct urb_priv *urb_priv = urb->hcpriv;
+ struct device *dev = ohci_to_hcd(ohci)->self.controller;
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
@@ -689,7 +691,7 @@ static void td_submit_urb (
if (quirk_amdiso(ohci))
usb_amd_quirk_pll_disable();
if (quirk_amdprefetch(ohci))
- sb800_prefetch(ohci, 1);
+ sb800_prefetch(dev, 1);
}
periodic = ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs++ == 0
&& ohci_to_hcd(ohci)->self.bandwidth_int_reqs == 0;
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 4c338ec..b9848e4 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -91,6 +91,19 @@ static struct amd_chipset_info {
static DEFINE_SPINLOCK(amd_lock);
+void sb800_prefetch(struct device *dev, int on)
+{
+ u16 misc;
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ pci_read_config_word(pdev, 0x50, &misc);
+ if (on == 0)
+ pci_write_config_word(pdev, 0x50, misc & 0xfcff);
+ else
+ pci_write_config_word(pdev, 0x50, misc | 0x0300);
+}
+EXPORT_SYMBOL_GPL(sb800_prefetch);
+
int usb_amd_find_chipset_info(void)
{
u8 rev = 0;
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index 7f69a39..4b8a209 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -11,11 +11,13 @@ void usb_amd_quirk_pll_enable(void);
bool usb_is_intel_switchable_xhci(struct pci_dev *pdev);
void usb_enable_xhci_ports(struct pci_dev *xhci_pdev);
void usb_disable_xhci_ports(struct pci_dev *xhci_pdev);
+void sb800_prefetch(struct device *dev, int on);
#else
static inline void usb_amd_quirk_pll_disable(void) {}
static inline void usb_amd_quirk_pll_enable(void) {}
static inline void usb_amd_dev_put(void) {}
static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
+static inline void sb800_prefetch(struct device *dev, int on) {}
#endif /* CONFIG_PCI */
#endif /* __LINUX_USB_PCI_QUIRKS_H */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [PATCH V8 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
@ 2013-05-28 13:04 ` Manjunath Goudar
2013-05-28 15:27 ` Alan Stern
2013-05-28 20:11 ` [PATCH V8 0/3] USB: OHCI: Start splitting up the driver Arnd Bergmann
3 siblings, 1 reply; 36+ messages in thread
From: Manjunath Goudar @ 2013-05-28 13:04 UTC (permalink / raw)
To: linux-arm-kernel
This patch splits the PCI portion of ohci-hcd out into its
own separate driver module, called ohci-pci.
The major point of difficulty lies in ohci-pci's many vendor- and
device-specific workarounds. Some of them have to be applied before
calling ohci_start() some after, which necessitates a fair amount of
code motion. The other platform drivers require much smaller changes.
The complete sb800_prefetch() function moved to ohci-q.c,because its
only related to ohci-pci driver.
USB_OHCI_HCD_PCI symbol no longer dependence on STB03xxx, PPC_MPC52xx and
USB_OHCI_HCD_PPC_OF that's what removed.
V2:
- few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
and rest of the generic code is written in ohci_start of ohci-hcd.c file.
V3:
- ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
V4:
-sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
-no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
-overrides renamed with pci_override,its giving proper meaning.
V5:
-sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
V6:
-sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
-Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
V7:
-Unrelated include file has been removed from ohci.h file.
V8:
-USB_OHCI_HCD_PCI symbol does not dependence on STB03xxx, PPC_MPC52xx and USB_OHCI_HCD_PPC_OF.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 6 +-
drivers/usb/host/Makefile | 3 +
drivers/usb/host/ohci-hcd.c | 20 +------
drivers/usb/host/ohci-pci.c | 131 +++++++++++++++----------------------------
4 files changed, 52 insertions(+), 108 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 64d7209..a0a2f3a 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -377,7 +377,7 @@ config USB_FUSBH200_HCD
module will be called fusbh200-hcd.
config USB_OHCI_HCD
- tristate "OHCI HCD support"
+ tristate "OHCI HCD (USB 1.1) support"
depends on USB_ARCH_HAS_OHCI
select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
depends on USB_ISP1301 || !ARCH_LPC32XX
@@ -446,8 +446,8 @@ config USB_OHCI_HCD_PPC_OF
default USB_OHCI_HCD_PPC_OF_BE || USB_OHCI_HCD_PPC_OF_LE
config USB_OHCI_HCD_PCI
- bool "OHCI support for PCI-bus USB controllers"
- depends on PCI && (STB03xxx || PPC_MPC52xx || USB_OHCI_HCD_PPC_OF)
+ tristate "OHCI support for PCI-bus USB controllers"
+ depends on PCI
default y
select USB_OHCI_LITTLE_ENDIAN
---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 661c558..2214ded 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -42,7 +42,10 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
+
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
+
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 194ae4a..237be7c 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1168,11 +1168,6 @@ MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
-#ifdef CONFIG_PCI
-#include "ohci-pci.c"
-#define PCI_DRIVER ohci_pci_driver
-#endif
-
#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
#include "ohci-sa1111.c"
#define SA1111_DRIVER ohci_hcd_sa1111_driver
@@ -1268,7 +1263,7 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_platform_driver
#endif
-#if !defined(PCI_DRIVER) && \
+#if !IS_ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \
@@ -1343,12 +1338,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_sa1111;
#endif
-#ifdef PCI_DRIVER
- retval = pci_register_driver(&PCI_DRIVER);
- if (retval < 0)
- goto error_pci;
-#endif
-
#ifdef SM501_OHCI_DRIVER
retval = platform_driver_register(&SM501_OHCI_DRIVER);
if (retval < 0)
@@ -1442,10 +1431,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&SM501_OHCI_DRIVER);
error_sm501:
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
- error_pci:
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
error_sa1111:
@@ -1510,9 +1495,6 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef SM501_OHCI_DRIVER
platform_driver_unregister(&SM501_OHCI_DRIVER);
#endif
-#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
-#endif
#ifdef SA1111_DRIVER
sa1111_driver_unregister(&SA1111_DRIVER);
#endif
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index c3fa936..08613e2 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -14,12 +14,19 @@
* This file is licenced under the GPL.
*/
-#ifndef CONFIG_PCI
-#error "This file is PCI bus glue. CONFIG_PCI must be defined."
-#endif
-
-#include <linux/pci.h>
#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+#include "pci-quirks.h"
+
+#define DRIVER_DESC "OHCI PCI platform driver"
+
+static const char hcd_name[] = "ohci-pci";
/*-------------------------------------------------------------------------*/
@@ -229,10 +236,10 @@ static const struct pci_device_id ohci_pci_quirks[] = {
static int ohci_pci_reset (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
int ret = 0;
if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
const struct pci_device_id *quirk_id;
quirk_id = pci_match_id(ohci_pci_quirks, pdev);
@@ -242,94 +249,25 @@ static int ohci_pci_reset (struct usb_hcd *hcd)
ret = quirk(hcd);
}
}
- if (ret == 0) {
- ohci_hcd_init (ohci);
- return ohci_init (ohci);
- }
- return ret;
-}
-
-
-static int ohci_pci_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
-#ifdef CONFIG_PM /* avoid warnings about unused pdev */
- if (hcd->self.controller) {
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
-
- /* RWC may not be set for add-in PCI cards, since boot
- * firmware probably ignored them. This transfers PCI
- * PM wakeup capabilities.
- */
- if (device_can_wakeup(&pdev->dev))
- ohci->hc_control |= OHCI_CTRL_RWC;
- }
-#endif /* CONFIG_PM */
- ret = ohci_run (ohci);
- if (ret < 0) {
- ohci_err (ohci, "can't start\n");
- ohci_stop (hcd);
- }
+ if (ret == 0)
+ ret = ohci_setup(hcd);
+ /*
+ * After ohci setup RWC may not be set for add-in PCI cards.
+ * This transfers PCI PM wakeup capabilities.
+ */
+ if (device_can_wakeup(&pdev->dev))
+ ohci->hc_control |= OHCI_CTRL_RWC;
return ret;
}
+static struct hc_driver __read_mostly ohci_pci_hc_driver;
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_MEMORY | HCD_USB11,
-
- /*
- * basic lifecycle operations
- */
+static const struct ohci_driver_overrides pci_overrides __initconst = {
+ .product_desc = "OHCI PCI host controller",
.reset = ohci_pci_reset,
- .start = ohci_pci_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
-#ifdef CONFIG_PM
- .pci_suspend = ohci_suspend,
- .pci_resume = ohci_resume,
-#endif
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ohci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ohci_hub_status_data,
- .hub_control = ohci_hub_control,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
};
-/*-------------------------------------------------------------------------*/
-
-
static const struct pci_device_id pci_ids [] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
@@ -357,3 +295,24 @@ static struct pci_driver ohci_pci_driver = {
},
#endif
};
+
+static int __init ohci_pci_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_pci_hc_driver, &pci_overrides);
+ return pci_register_driver(&ohci_pci_driver);
+}
+module_init(ohci_pci_init);
+
+static void __exit ohci_pci_cleanup(void)
+{
+ pci_unregister_driver(&ohci_pci_driver);
+}
+module_exit(ohci_pci_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
--
1.7.9.5
^ permalink raw reply related [flat|nested] 36+ messages in thread
* [PATCH V8 3/3] USB: OHCI: make ohci-pci a separate driver
2013-05-28 13:04 ` [PATCH V8 3/3] USB: OHCI: " Manjunath Goudar
@ 2013-05-28 15:27 ` Alan Stern
0 siblings, 0 replies; 36+ messages in thread
From: Alan Stern @ 2013-05-28 15:27 UTC (permalink / raw)
To: linux-arm-kernel
On Tue, 28 May 2013, Manjunath Goudar wrote:
> This patch splits the PCI portion of ohci-hcd out into its
> own separate driver module, called ohci-pci.
>
> The major point of difficulty lies in ohci-pci's many vendor- and
> device-specific workarounds. Some of them have to be applied before
> calling ohci_start() some after, which necessitates a fair amount of
> code motion. The other platform drivers require much smaller changes.
>
> The complete sb800_prefetch() function moved to ohci-q.c,because its
> only related to ohci-pci driver.
>
> USB_OHCI_HCD_PCI symbol no longer dependence on STB03xxx, PPC_MPC52xx and
> USB_OHCI_HCD_PPC_OF that's what removed.
>
> V2:
> - few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
> and rest of the generic code is written in ohci_start of ohci-hcd.c file.
> V3:
> - ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
>
> V4:
> -sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
> -no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
> -overrides renamed with pci_override,its giving proper meaning.
>
> V5:
> -sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
>
> V6:
> -sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
> -Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
>
> V7:
> -Unrelated include file has been removed from ohci.h file.
>
> V8:
> -USB_OHCI_HCD_PCI symbol does not dependence on STB03xxx, PPC_MPC52xx and USB_OHCI_HCD_PPC_OF.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
` (2 preceding siblings ...)
2013-05-28 13:04 ` [PATCH V8 3/3] USB: OHCI: " Manjunath Goudar
@ 2013-05-28 20:11 ` Arnd Bergmann
2013-05-29 16:21 ` Alan Stern
3 siblings, 1 reply; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-28 20:11 UTC (permalink / raw)
To: linux-arm-kernel
On Tuesday 28 May 2013, Manjunath Goudar wrote:
> This series of patches begins the process of splitting ohci-hcd up into
> a core library module and independent pci driver modules.
>
Seems to basically work now, but I'm getting run-time errors after
loading the driver, with patch 1/3 applied:
[15916.438452] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.0/input/input26
[15916.438584] hid-generic 0003:046D:C050.0017: input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:12.0-1/input0
[15917.465597] usb 3-3: new full-speed USB device number 3 using ohci-pci
[15917.636712] usb 3-3: New USB device found, idVendor=0ccd, idProduct=0077
[15917.636717] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[15917.636721] usb 3-3: Product: USB PnP Sound Device
[15917.636724] usb 3-3: Manufacturer: C-Media Electronics Inc.
[15917.812827] input: C-Media Electronics Inc. USB PnP Sound Device as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.3/input/input27
[15917.812919] hid-generic 0003:0CCD:0077.0018: input,hidraw1: USB HID v1.00 Device [C-Media Electronics Inc. USB PnP Sound Device] on usb-0000:00:12.0-3/input3
[15918.789906] cannot submit urb (err = -18)
[15918.790163] cannot submit urb (err = -18)
[15918.842095] usb 7-1: new full-speed USB device number 2 using ohci-pci
[15919.883135] cannot submit urb (err = -18)
[15919.883604] cannot submit urb (err = -18)
[15919.883613] cannot submit urb (err = -18)
[15919.883616] cannot submit urb (err = -18)
[15919.883619] cannot submit urb (err = -18)
[15919.883623] cannot submit urb (err = -18)
[15919.883626] cannot submit urb (err = -18)
[15919.883629] cannot submit urb (err = -18)
[15919.883632] cannot submit urb (err = -18)
[15919.883639] delay: estimated 354, actual 1
[15919.883644] cannot submit urb (err = -18)
[15919.883647] delay: estimated 353, actual 0
[15919.883651] cannot submit urb (err = -18)
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-28 20:11 ` [PATCH V8 0/3] USB: OHCI: Start splitting up the driver Arnd Bergmann
@ 2013-05-29 16:21 ` Alan Stern
2013-05-29 18:08 ` Arnd Bergmann
0 siblings, 1 reply; 36+ messages in thread
From: Alan Stern @ 2013-05-29 16:21 UTC (permalink / raw)
To: linux-arm-kernel
On Tue, 28 May 2013, Arnd Bergmann wrote:
> Seems to basically work now, but I'm getting run-time errors after
> loading the driver, with patch 1/3 applied:
>
> [15916.438452] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.0/input/input26
> [15916.438584] hid-generic 0003:046D:C050.0017: input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:12.0-1/input0
> [15917.465597] usb 3-3: new full-speed USB device number 3 using ohci-pci
> [15917.636712] usb 3-3: New USB device found, idVendor=0ccd, idProduct=0077
> [15917.636717] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [15917.636721] usb 3-3: Product: USB PnP Sound Device
> [15917.636724] usb 3-3: Manufacturer: C-Media Electronics Inc.
> [15917.812827] input: C-Media Electronics Inc. USB PnP Sound Device as /devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.3/input/input27
> [15917.812919] hid-generic 0003:0CCD:0077.0018: input,hidraw1: USB HID v1.00 Device [C-Media Electronics Inc. USB PnP Sound Device] on usb-0000:00:12.0-3/input3
> [15918.789906] cannot submit urb (err = -18)
> [15918.790163] cannot submit urb (err = -18)
> [15918.842095] usb 7-1: new full-speed USB device number 2 using ohci-pci
> [15919.883135] cannot submit urb (err = -18)
> [15919.883604] cannot submit urb (err = -18)
> [15919.883613] cannot submit urb (err = -18)
> [15919.883616] cannot submit urb (err = -18)
> [15919.883619] cannot submit urb (err = -18)
Those error messages are annoying; they don't use dev_err(), so they
don't include the device and driver names. There's no way to know what
they refer to. I rather suspect they come from the usbaudio driver.
When you ran this test, did you have commit 815fa7b91761 applied?
Does the same problem occur without Manjunath's changes?
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-29 16:21 ` Alan Stern
@ 2013-05-29 18:08 ` Arnd Bergmann
2013-05-29 18:16 ` Alan Stern
0 siblings, 1 reply; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-29 18:08 UTC (permalink / raw)
To: linux-arm-kernel
On Wednesday 29 May 2013 12:21:02 Alan Stern wrote:
>
> Those error messages are annoying; they don't use dev_err(), so they
> don't include the device and driver names. There's no way to know what
> they refer to. I rather suspect they come from the usbaudio driver.
That makes sense. I have a usb audio device, and I don't actually recall
getting any sound from my speakers while testing it. I only checked
that the mouse was working and assumed that the usb-audio was driven
by ehci, but upon closer inspection, they are both on the same OHCI.
> When you ran this test, did you have commit 815fa7b91761 applied?
Yes.
> Does the same problem occur without Manjunath's changes?
No, it was introduced by the first patch, as I found later.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-29 18:08 ` Arnd Bergmann
@ 2013-05-29 18:16 ` Alan Stern
2013-05-29 22:02 ` Arnd Bergmann
0 siblings, 1 reply; 36+ messages in thread
From: Alan Stern @ 2013-05-29 18:16 UTC (permalink / raw)
To: linux-arm-kernel
On Wed, 29 May 2013, Arnd Bergmann wrote:
> On Wednesday 29 May 2013 12:21:02 Alan Stern wrote:
> >
> > Those error messages are annoying; they don't use dev_err(), so they
> > don't include the device and driver names. There's no way to know what
> > they refer to. I rather suspect they come from the usbaudio driver.
>
> That makes sense. I have a usb audio device, and I don't actually recall
> getting any sound from my speakers while testing it. I only checked
> that the mouse was working and assumed that the usb-audio was driven
> by ehci, but upon closer inspection, they are both on the same OHCI.
>
> > When you ran this test, did you have commit 815fa7b91761 applied?
>
> Yes.
>
> > Does the same problem occur without Manjunath's changes?
>
> No, it was introduced by the first patch, as I found later.
I'll try to replicate your result. I don't have my USB audio device
here today, so it will have to wait until tomorrow.
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-29 18:16 ` Alan Stern
@ 2013-05-29 22:02 ` Arnd Bergmann
2013-05-31 14:12 ` Alan Stern
0 siblings, 1 reply; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-29 22:02 UTC (permalink / raw)
To: linux-arm-kernel
On Wednesday 29 May 2013, Alan Stern wrote:
>
> On Wed, 29 May 2013, Arnd Bergmann wrote:
>
> > On Wednesday 29 May 2013 12:21:02 Alan Stern wrote:
> > >
> > > Those error messages are annoying; they don't use dev_err(), so they
> > > don't include the device and driver names. There's no way to know what
> > > they refer to. I rather suspect they come from the usbaudio driver.
> >
> > That makes sense. I have a usb audio device, and I don't actually recall
> > getting any sound from my speakers while testing it. I only checked
> > that the mouse was working and assumed that the usb-audio was driven
> > by ehci, but upon closer inspection, they are both on the same OHCI.
> >
> > > When you ran this test, did you have commit 815fa7b91761 applied?
> >
> > Yes.
> >
> > > Does the same problem occur without Manjunath's changes?
> >
> > No, it was introduced by the first patch, as I found later.
>
> I'll try to replicate your result. I don't have my USB audio device
> here today, so it will have to wait until tomorrow.
Strange enough, it seems to be working now, on a different base.
The kernel I tried last (based on yesterday's linux-next) also
had other issues and was very slow, so it may have been something
different.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-29 22:02 ` Arnd Bergmann
@ 2013-05-31 14:12 ` Alan Stern
2013-05-31 14:57 ` Arnd Bergmann
0 siblings, 1 reply; 36+ messages in thread
From: Alan Stern @ 2013-05-31 14:12 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 30 May 2013, Arnd Bergmann wrote:
> > I'll try to replicate your result. I don't have my USB audio device
> > here today, so it will have to wait until tomorrow.
>
> Strange enough, it seems to be working now, on a different base.
>
> The kernel I tried last (based on yesterday's linux-next) also
> had other issues and was very slow, so it may have been something
> different.
My test ran successfully, no problems. I guess we can ignore this.
Alan Stern
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH V8 0/3] USB: OHCI: Start splitting up the driver
2013-05-31 14:12 ` Alan Stern
@ 2013-05-31 14:57 ` Arnd Bergmann
0 siblings, 0 replies; 36+ messages in thread
From: Arnd Bergmann @ 2013-05-31 14:57 UTC (permalink / raw)
To: linux-arm-kernel
On Friday 31 May 2013 10:12:38 Alan Stern wrote:
> On Thu, 30 May 2013, Arnd Bergmann wrote:
>
> > > I'll try to replicate your result. I don't have my USB audio device
> > > here today, so it will have to wait until tomorrow.
> >
> > Strange enough, it seems to be working now, on a different base.
> >
> > The kernel I tried last (based on yesterday's linux-next) also
> > had other issues and was very slow, so it may have been something
> > different.
>
> My test ran successfully, no problems. I guess we can ignore this.
Ok, good.
Arnd
^ permalink raw reply [flat|nested] 36+ messages in thread
end of thread, other threads:[~2013-05-31 14:57 UTC | newest]
Thread overview: 36+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <1365746856-7772-2-git-send-email-manjunath.goudar@linaro.org>
2013-05-07 9:50 ` [RFC PATCH 0/2] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-07 9:50 ` [RFC PATCH 1/2] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-07 15:15 ` Alan Stern
2013-05-07 9:50 ` [RFC PATCH 2/2] USB: OHCI: make ohci-pci a separate driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-23 11:11 ` [RFC V6 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-23 14:27 ` Alan Stern
2013-05-23 11:11 ` [RFC PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
2013-05-23 13:26 ` Arnd Bergmann
2013-05-23 14:30 ` Alan Stern
2013-05-23 11:11 ` [RFC V6 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2013-05-23 14:37 ` Alan Stern
2013-05-23 17:01 ` Arnd Bergmann
2013-05-23 17:37 ` Alan Stern
2013-05-23 17:42 ` Arnd Bergmann
2013-05-27 12:25 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Manjunath Goudar
2013-05-27 12:25 ` [RFC V7 PATCH 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-27 14:54 ` Alan Stern
2013-05-27 12:25 ` [RFC V7 PATCH 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
2013-05-27 14:55 ` Alan Stern
2013-05-27 12:25 ` [RFC V7 PATCH 3/3] USB: OHCI: " Manjunath Goudar
2013-05-27 14:58 ` Alan Stern
2013-05-27 20:38 ` Arnd Bergmann
2013-05-27 13:29 ` [RFC V7 PATCH 0/3] USB: OHCI: Start splitting up the driver Viresh Kumar
2013-05-28 13:04 ` [PATCH V8 " Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 1/3] USB: OHCI: prepare to make ohci-hcd a library module Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 2/3] USB: OHCI: Generic changes to make ohci-pci a separate driver Manjunath Goudar
2013-05-28 13:04 ` [PATCH V8 3/3] USB: OHCI: " Manjunath Goudar
2013-05-28 15:27 ` Alan Stern
2013-05-28 20:11 ` [PATCH V8 0/3] USB: OHCI: Start splitting up the driver Arnd Bergmann
2013-05-29 16:21 ` Alan Stern
2013-05-29 18:08 ` Arnd Bergmann
2013-05-29 18:16 ` Alan Stern
2013-05-29 22:02 ` Arnd Bergmann
2013-05-31 14:12 ` Alan Stern
2013-05-31 14:57 ` Arnd Bergmann
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