Hi, On Mon, Oct 07, 2013 at 06:12:30AM -0400, Matt Porter wrote: > Broadcom BCM281xx parts have a PHY control block that > operates in conjunction with the DWC2 USB OTG. This driver > exposes an API that allows control of power/reset for a > connected USB PHY. > > Signed-off-by: Matt Porter > Reviewed-by: Markus Mayer > Reviewed-by: Tim Kryger > --- > .../devicetree/bindings/usb/bcm-kona-usb-ctrl.txt | 12 ++ > drivers/usb/phy/Kconfig | 5 + > drivers/usb/phy/Makefile | 1 + > drivers/usb/phy/bcm-kona-usb.h | 31 +++++ > drivers/usb/phy/phy-bcm-kona-ctrl.c | 151 +++++++++++++++++++++ > 5 files changed, 200 insertions(+) > create mode 100644 Documentation/devicetree/bindings/usb/bcm-kona-usb-ctrl.txt > create mode 100644 drivers/usb/phy/bcm-kona-usb.h > create mode 100644 drivers/usb/phy/phy-bcm-kona-ctrl.c > > diff --git a/Documentation/devicetree/bindings/usb/bcm-kona-usb-ctrl.txt b/Documentation/devicetree/bindings/usb/bcm-kona-usb-ctrl.txt > new file mode 100644 > index 0000000..98163f6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/usb/bcm-kona-usb-ctrl.txt > @@ -0,0 +1,12 @@ > +BROADCOM KONA USB CONTROL > + > +Required properties: > + - compatible: brcm,kona-ctrl-usb > + - reg: offset and length of the USB control registers > + > +Example: > + > + usbctl: usbctl@3f130000 { > + compatible = "brcm,kona-ctrl-usb"; > + reg = <0x3f130000 0x28>; > + }; > diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig > index d5589f9..2b7b4f1 100644 > --- a/drivers/usb/phy/Kconfig > +++ b/drivers/usb/phy/Kconfig > @@ -100,6 +100,11 @@ config AM335X_PHY_USB > This driver provides PHY support for that phy which part for the > AM335x SoC. > > +config BCM_KONA_CTRL_USB > + tristate > + help > + Enable this to support the Broadcom Kona USB control block > + > config SAMSUNG_USBPHY > tristate > help > diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile > index 2135e85..98c545e 100644 > --- a/drivers/usb/phy/Makefile > +++ b/drivers/usb/phy/Makefile > @@ -15,6 +15,7 @@ obj-$(CONFIG_NOP_USB_XCEIV) += phy-generic.o > obj-$(CONFIG_OMAP_CONTROL_USB) += phy-omap-control.o > obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o > obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o > +obj-$(CONFIG_BCM_KONA_CTRL_USB) += phy-bcm-kona-ctrl.o > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > obj-$(CONFIG_OMAP_USB3) += phy-omap-usb3.o > obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o > diff --git a/drivers/usb/phy/bcm-kona-usb.h b/drivers/usb/phy/bcm-kona-usb.h > new file mode 100644 > index 0000000..4563dd6 > --- /dev/null > +++ b/drivers/usb/phy/bcm-kona-usb.h > @@ -0,0 +1,31 @@ > +/* > + * bcm_kona_usb.h -- Broadcom Kona USB header file > + * > + * Copyright (C) 2013 Linaro Limited > + * Matt Porter > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#ifndef __BCM_KONA_USB_H > +#define __BCM_KONA_USB_H > + > +#include > + > +struct bcm_kona_usb { > + struct usb_phy phy; > + struct device *dev; > + struct device *ctrl_dev; > +}; > + > +extern struct device *bcm_kona_get_ctrl_dev(void); > +extern void bcm_kona_ctrl_usb_phy_power(struct device *, int); looks like a job for extcon fwk. > diff --git a/drivers/usb/phy/phy-bcm-kona-ctrl.c b/drivers/usb/phy/phy-bcm-kona-ctrl.c > new file mode 100644 > index 0000000..d2936b6 > --- /dev/null > +++ b/drivers/usb/phy/phy-bcm-kona-ctrl.c > @@ -0,0 +1,151 @@ > +/* > + * phy-bcm-kona-ctrl.c - Broadcom Kona USB Control Driver > + * > + * Based on phy-omap-control.c > + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com > + * Copyright (C) 2013 Linaro Limited > + * Matt Porter > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include "bcm-kona-usb.h" > + > +#define OTGCTL_OTGSTAT2 (1 << 31) > +#define OTGCTL_OTGSTAT1 (1 << 30) > +#define OTGCTL_PRST_N_SW (1 << 11) > +#define OTGCTL_HRESET_N (1 << 10) > +#define OTGCTL_UTMI_LINE_STATE1 (1 << 9) > +#define OTGCTL_UTMI_LINE_STATE0 (1 << 8) > + > +#define P1CTL_SOFT_RESET (1 << 1) > +#define P1CTL_NON_DRIVING (1 << 0) > + > +struct bcm_kona_usb_ctrl_regs { > + u32 ctrl; > + u32 cfg; > + u32 p1ctl; > + u32 status; > + u32 bc_cfg; > + u32 tp_in; > + u32 tp_out; > + u32 phy_ctrl; > + u32 usbreg; > + u32 usbproben; > +}; > + > +struct bcm_kona_ctrl_usb { > + struct device *dev; > + struct bcm_kona_usb_ctrl_regs *regs; > +}; > + > +static struct bcm_kona_ctrl_usb *ctrl_usb; > + > +/** > + * bcm_kona_ctrl_dev - returns the device pointer for this control device > + * > + * This API should be called to get the device pointer for the Kona USB > + * control device. This device pointer should be used when calling the > + * exported bcm_kona_ctrl_usb_phy_power() API. > + */ > +struct device *bcm_kona_get_ctrl_dev(void) > +{ > + if (!ctrl_usb) > + return ERR_PTR(-ENODEV); > + > + return ctrl_usb->dev; > +} > +EXPORT_SYMBOL_GPL(bcm_kona_get_ctrl_dev); definitely a job for extcon ;-) > +void bcm_kona_ctrl_usb_phy_power(struct device *dev, int on) > +{ > + struct bcm_kona_ctrl_usb *ctrl = dev_get_drvdata(dev); > + u32 val; > + > + val = readl(&ctrl->regs->ctrl); > + if (on) { > + /* Configure and power PHY */ > + val &= ~(OTGCTL_OTGSTAT2 | OTGCTL_OTGSTAT1 | > + OTGCTL_UTMI_LINE_STATE1 | OTGCTL_UTMI_LINE_STATE0); > + val |= OTGCTL_PRST_N_SW | OTGCTL_HRESET_N; > + writel(val, &ctrl->regs->ctrl); > + > + /* Soft reset PHY */ > + val = readl(&ctrl->regs->p1ctl); > + val &= ~P1CTL_NON_DRIVING; > + val |= P1CTL_SOFT_RESET; > + writel(val, &ctrl->regs->p1ctl); > + writel(val & ~P1CTL_SOFT_RESET, &ctrl->regs->p1ctl); > + /* Reset needs to be asserted for 2ms */ > + mdelay(2); > + writel(val | P1CTL_SOFT_RESET, &ctrl->regs->p1ctl); > + } else { > + val &= ~(OTGCTL_PRST_N_SW | OTGCTL_HRESET_N); > + writel(val, &ctrl->regs->ctrl); > + } > +} > +EXPORT_SYMBOL_GPL(bcm_kona_ctrl_usb_phy_power); what a hack :-) Please use phy->init() and phy->exit() callbacks. In fact, please use Kishon's generic PHY layer. -- balbi