All phy related programming like enabling/disabling the clocks, powering on/off the phy is taken care of by this driver. It is also used for OTG related functionality like srp. Cc: Felipe Balbi <balbi@xxxxxx> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> --- drivers/usb/otg/Kconfig | 17 ++- drivers/usb/otg/Makefile | 1 + drivers/usb/otg/omap-usb2.c | 232 +++++++++++++++++++++++++++++++++++++ include/linux/usb/omap_usb.h | 47 ++++++++ include/linux/usb/phy_companion.h | 34 ++++++ 5 files changed, 327 insertions(+), 4 deletions(-) create mode 100644 drivers/usb/otg/omap-usb2.c create mode 100644 include/linux/usb/omap_usb.h create mode 100644 include/linux/usb/phy_companion.h diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig index e2840f1..3264c0d 100644 --- a/drivers/usb/otg/Kconfig +++ b/drivers/usb/otg/Kconfig @@ -73,10 +73,8 @@ config TWL6030_USB help Enable this to support the USB OTG transceiver on TWL6030 family chips. This TWL6030 transceiver has the VBUS and ID GND - and OTG SRP events capabilities. For all other transceiver functionality - UTMI PHY is embedded in OMAP4430. The internal PHY configurations APIs - are hooked to this driver through platform_data structure. - The definition of internal PHY APIs are in the mach-omap2 layer. + and OTG SRP events capabilities. For all other transceiver + functionality UTMI PHY is embedded in OMAP4430. config OMAP4_USB_PHY tristate "Texas Instruments OMAP4+ USB pin control driver" @@ -91,6 +89,17 @@ config OMAP4_USB_PHY performing the above mentioned configuration, API's are added in by this children of the control module driver. +config OMAP_USB2 + tristate "OMAP USB2 PHY Driver" + depends on OMAP_OCP2SCP + depends on OMAP4_USB_PHY + select USB_OTG_UTILS + help + Enable this to support the transceiver that is part of SOC. This + driver takes care of all the PHY functionality apart from comparator. + The USB OTG controller communicates with the comparator using this + driver. + config NOP_USB_XCEIV tristate "NOP USB Transceiver Driver" select USB_OTG_UTILS diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile index 60c8c83..2f02912 100644 --- a/drivers/usb/otg/Makefile +++ b/drivers/usb/otg/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o obj-$(CONFIG_TWL6030_USB) += twl6030-usb.o obj-$(CONFIG_OMAP4_USB_PHY) += omap4-usb-phy.o +obj-$(CONFIG_OMAP_USB2) += omap-usb2.o obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o obj-$(CONFIG_USB_ULPI) += ulpi.o obj-$(CONFIG_USB_ULPI_VIEWPORT) += ulpi_viewport.o diff --git a/drivers/usb/otg/omap-usb2.c b/drivers/usb/otg/omap-usb2.c new file mode 100644 index 0000000..ccd74b6 --- /dev/null +++ b/drivers/usb/otg/omap-usb2.c @@ -0,0 +1,232 @@ +/* + * omap-usb2.c - USB PHY, talking to musb controller in OMAP. + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <kishon@xxxxxx> + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/usb/omap_usb.h> +#include <linux/usb/phy_companion.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/delay.h> +#include <linux/mfd/omap_control.h> +#include <linux/usb/omap4_usb_phy.h> + +/** + * omap_usb2_set_comparator - links the comparator present in the sytem with + * this phy + * @comparator - the companion phy(comparator) for this phy + * + * The phy companion driver should call this API passing the phy_companion + * filled with set_vbus and start_srp to be used by usb phy. + * + * For use by phy companion driver + */ +void omap_usb2_set_comparator(struct phy_companion *comparator) +{ + struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2); + struct omap_usb *phy = phy_to_omapusb(x); + + phy->comparator = comparator; +} +EXPORT_SYMBOL_GPL(omap_usb2_set_comparator); + +static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled) +{ + struct omap_usb *phy = phy_to_omapusb(otg->phy); + + if (!phy->comparator) + return -ENODEV; + + return phy->comparator->set_vbus(phy->comparator, enabled); +} + +static int omap_usb_start_srp(struct usb_otg *otg) +{ + struct omap_usb *phy = phy_to_omapusb(otg->phy); + + if (!phy->comparator) + return -ENODEV; + + return phy->comparator->start_srp(phy->comparator); +} + +static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct usb_phy *phy = otg->phy; + + otg->host = host; + if (!host) + phy->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int omap_usb_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct usb_phy *phy = otg->phy; + + otg->gadget = gadget; + if (!gadget) + phy->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int omap_usb2_suspend(struct usb_phy *x, int suspend) +{ + struct omap_usb *phy = phy_to_omapusb(x); + + if (suspend && !phy->is_suspended) { + pm_runtime_put_sync(phy->dev); + phy->is_suspended = 1; + } else if (!suspend && phy->is_suspended) { + pm_runtime_get_sync(phy->dev); + phy->is_suspended = 0; + } + + return 0; +} + +static int __devinit omap_usb2_probe(struct platform_device *pdev) +{ + struct omap_usb *phy; + struct usb_otg *otg; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) { + dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n"); + return -ENOMEM; + } + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) { + dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n"); + return -ENOMEM; + } + + phy->dev = &pdev->dev; + + phy->phy.dev = phy->dev; + phy->phy.label = "omap-usb2"; + phy->phy.set_suspend = omap_usb2_suspend; + phy->phy.otg = otg; + + phy->control_dev = omap_control_get(); + if (IS_ERR(phy->control_dev)) { + dev_err(&pdev->dev, "no control device present in system\n"); + return PTR_ERR(phy->control_dev); + } + + phy->is_suspended = 1; + omap4_usb_phy_power(phy->control_dev, 0); + + otg->set_host = omap_usb_set_host; + otg->set_peripheral = omap_usb_set_peripheral; + otg->set_vbus = omap_usb_set_vbus; + otg->start_srp = omap_usb_start_srp; + otg->phy = &phy->phy; + + phy->wkupclk = clk_get(phy->dev, "usb_phy_cm_clk32k"); + + usb_add_phy(&phy->phy, USB_PHY_TYPE_USB2); + + platform_set_drvdata(pdev, phy); + + pm_runtime_enable(phy->dev); + + return 0; +} + +static int __devexit omap_usb2_remove(struct platform_device *pdev) +{ + struct omap_usb *phy = platform_get_drvdata(pdev); + + usb_remove_phy(&phy->phy); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM + +static int omap_usb2_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct omap_usb *phy = platform_get_drvdata(pdev); + + clk_disable(phy->wkupclk); + omap4_usb_phy_power(phy->control_dev, 0); + + return 0; +} + +static int omap_usb2_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct omap_usb *phy = platform_get_drvdata(pdev); + + omap4_usb_phy_power(phy->control_dev, 1); + clk_enable(phy->wkupclk); + + return 0; +} + +static const struct dev_pm_ops omap_usb2_pm_ops = { + SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume, + NULL) +}; + +#define DEV_PM_OPS (&omap_usb2_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif + +static struct platform_driver omap_usb2_driver = { + .probe = omap_usb2_probe, + .remove = __devexit_p(omap_usb2_remove), + .driver = { + .name = "omap-usb2", + .owner = THIS_MODULE, + .pm = DEV_PM_OPS, + }, +}; + +static int __init usb2_omap_init(void) +{ + return platform_driver_register(&omap_usb2_driver); +} +arch_initcall(usb2_omap_init); + +static void __exit usb2_omap_exit(void) +{ + platform_driver_unregister(&omap_usb2_driver); +} +module_exit(usb2_omap_exit); + +MODULE_ALIAS("platform: omap_usb2"); +MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@xxxxxx>"); +MODULE_DESCRIPTION("OMAP USB2 PHY DRIVER"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/usb/omap_usb.h b/include/linux/usb/omap_usb.h new file mode 100644 index 0000000..8d781df --- /dev/null +++ b/include/linux/usb/omap_usb.h @@ -0,0 +1,47 @@ +/* + * omap_usb.h -- omap usb2 phy header file + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <kishon@xxxxxx> + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifndef __DRIVERS_OMAP_USB2_H +#define __DRIVERS_OMAP_USB2_H + +#include <linux/usb/otg.h> + +struct omap_usb { + struct usb_phy phy; + struct phy_companion *comparator; + struct device *dev; + struct device *control_dev; + struct clk *wkupclk; + u8 is_suspended:1; +}; + +#define phy_to_omapusb(x) container_of((x), struct omap_usb, phy) + +#if defined(CONFIG_OMAP_USB2) || defined(CONFIG_OMAP_USB2_MODULE) +void omap_usb2_set_comparator(struct phy_companion *comparator); +#else +static inline void omap_usb2_set_comparator(struct phy_companion *comparator) +{ +} +#endif + +#endif /* __DRIVERS_OMAP_USB_H */ diff --git a/include/linux/usb/phy_companion.h b/include/linux/usb/phy_companion.h new file mode 100644 index 0000000..321290f --- /dev/null +++ b/include/linux/usb/phy_companion.h @@ -0,0 +1,34 @@ +/* + * phy-companion.h -- phy companion to indicate the comparator part of PHY + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <kishon@xxxxxx> + * + * 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 __DRIVERS_PHY_COMPANION_H +#define __DRIVERS_PHY_COMPANION_H + +#include <linux/usb/otg.h> + +/* phy_companion to take care of VBUS, ID and srp capabilities */ +struct phy_companion { + + /* effective for A-peripheral, ignored for B devices */ + int (*set_vbus)(struct phy_companion *x, bool enabled); + + /* for B devices only: start session with A-Host */ + int (*start_srp)(struct phy_companion *x); +}; + +#endif /* __DRIVERS_PHY_COMPANION_H */ -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
