| Message ID | 1381140752-312-4-git-send-email-matt.porter@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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 <matt.porter@linaro.org> > Reviewed-by: Markus Mayer <markus.mayer@linaro.org> > Reviewed-by: Tim Kryger <tim.kryger@linaro.org> > --- > .../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 <matt.porter@linaro.org> > + * > + * 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 <linux/usb/phy.h> > + > +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 <matt.porter@linaro.org> > + * > + * 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 <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include <linux/of.h> > +#include <linux/err.h> > +#include <linux/io.h> > +#include <linux/clk.h> > + > +#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.
On 10/10/2013 11:31 AM, Felipe Balbi wrote: > 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 <matt.porter@linaro.org> >> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> >> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> >> --- >> .../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 <matt.porter@linaro.org> >> + * >> + * 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 <linux/usb/phy.h> >> + >> +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 <matt.porter@linaro.org> >> + * >> + * 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 <linux/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/slab.h> >> +#include <linux/of.h> >> +#include <linux/err.h> >> +#include <linux/io.h> >> +#include <linux/clk.h> >> + >> +#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. Ok, reworking on top of his series...looks to be straightforward. Thanks, Matt
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 <matt.porter@linaro.org> + * + * 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 <linux/usb/phy.h> + +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); + +#endif /* __BCM_KONA_USB_H */ 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 <matt.porter@linaro.org> + * + * 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 <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/clk.h> + +#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); + +/** + * bcm_kona_ctrl_usb_phy_power - power on/off the phy using control module reg + * @dev: the control module device + * @on: 0 or 1, based on powering on or off the PHY + */ +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); + +static int bcm_kona_ctrl_usb_probe(struct platform_device *pdev) +{ + struct resource *res; + + ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL); + if (!ctrl_usb) { + dev_err(&pdev->dev, "unable to alloc memory for control usb\n"); + return -ENOMEM; + } + + ctrl_usb->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctrl_usb->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ctrl_usb->regs)) + return PTR_ERR(ctrl_usb->regs); + + dev_set_drvdata(ctrl_usb->dev, ctrl_usb); + + return 0; +} + +static const struct of_device_id bcm_kona_ctrl_usb_id_table[] = { + { .compatible = "brcm,kona-ctrl-usb" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, bcm_kona_ctrl_usb_id_table); + +static struct platform_driver bcm_kona_ctrl_usb_driver = { + .probe = bcm_kona_ctrl_usb_probe, + .driver = { + .name = "bcm-kona-ctrl-usb", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(bcm_kona_ctrl_usb_id_table), + }, +}; + +module_platform_driver(bcm_kona_ctrl_usb_driver); + +MODULE_ALIAS("platform:bcm-kona-ctrl-usb"); +MODULE_AUTHOR("Matt Porter"); +MODULE_DESCRIPTION("Broadcom Kona USB Control Driver"); +MODULE_LICENSE("GPL v2");