From 33f82f387b9cb27bc903e1368fce88b73213910a Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Tue, 7 Dec 2010 17:54:03 +0530 Subject: [PATCH] USB: gadget: Add USB controller driver for MSM SoC MSM SoC has chipidea USB controller. So use ci13xxx_udc core. This driver depends on transceiver driver for clock control, PHY initialization, VBUS detection. Register for notify_event callback to perform MSM specific quirks after controller is reset and stopped. Signed-off-by: Pavankumar Kondeti Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/Kconfig | 21 +++++ drivers/usb/gadget/Makefile | 1 + drivers/usb/gadget/ci13xxx_msm.c | 130 ++++++++++++++++++++++++++++++ drivers/usb/gadget/gadget_chips.h | 8 ++ 4 files changed, 160 insertions(+) create mode 100644 drivers/usb/gadget/ci13xxx_msm.c diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 6bcbcb073e56..7201b4e32778 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -531,6 +531,27 @@ config USB_EG20T default USB_GADGET select USB_GADGET_SELECTED +config USB_GADGET_CI13XXX_MSM + boolean "MIPS USB CI13xxx for MSM" + depends on ARCH_MSM + select USB_GADGET_DUALSPEED + select USB_MSM_OTG_72K + help + MSM SoC has chipidea USB controller. This driver uses + ci13xxx_udc core. + This driver depends on OTG driver for PHY initialization, + clock management, powering up VBUS, and power management. + + Say "y" to link the driver statically, or "m" to build a + dynamically linked module called "ci13xxx_msm" and force all + gadget drivers to also be dynamically linked. + +config USB_CI13XXX_MSM + tristate + depends on USB_GADGET_CI13XXX_MSM + default USB_GADGET + select USB_GADGET_SELECTED + # # LAST -- dummy/emulated controller # diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile index f53fda7c2558..fbf5db4d456d 100644 --- a/drivers/usb/gadget/Makefile +++ b/drivers/usb/gadget/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_USB_LANGWELL) += langwell_udc.o obj-$(CONFIG_USB_EG20T) += pch_udc.o obj-$(CONFIG_USB_PXA_U2O) += mv_udc.o mv_udc-y := mv_udc_core.o mv_udc_phy.o +obj-$(CONFIG_USB_CI13XXX_MSM) += ci13xxx_msm.o # # USB gadget drivers diff --git a/drivers/usb/gadget/ci13xxx_msm.c b/drivers/usb/gadget/ci13xxx_msm.c new file mode 100644 index 000000000000..c497337bb72b --- /dev/null +++ b/drivers/usb/gadget/ci13xxx_msm.c @@ -0,0 +1,130 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + */ + +#include +#include +#include +#include + +#include "ci13xxx_udc.c" + +#define MSM_USB_BASE (udc->regs) + +static irqreturn_t msm_udc_irq(int irq, void *data) +{ + return udc_irq(); +} + +static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event) +{ + struct device *dev = udc->gadget.dev.parent; + int val; + + switch (event) { + case CI13XXX_CONTROLLER_RESET_EVENT: + dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n"); + writel(0, USB_AHBBURST); + writel(0, USB_AHBMODE); + break; + case CI13XXX_CONTROLLER_STOPPED_EVENT: + dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n"); + /* + * Put the transceiver in non-driving mode. Otherwise host + * may not detect soft-disconnection. + */ + val = otg_io_read(udc->transceiver, ULPI_FUNC_CTRL); + val &= ~ULPI_FUNC_CTRL_OPMODE_MASK; + val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; + otg_io_write(udc->transceiver, val, ULPI_FUNC_CTRL); + break; + default: + dev_dbg(dev, "unknown ci13xxx_udc event\n"); + break; + } +} + +static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = { + .name = "ci13xxx_msm", + .flags = CI13XXX_REGS_SHARED | + CI13XXX_REQUIRE_TRANSCEIVER | + CI13XXX_PULLUP_ON_VBUS | + CI13XXX_DISABLE_STREAMING, + + .notify_event = ci13xxx_msm_notify_event, +}; + +static int ci13xxx_msm_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *regs; + int irq; + int ret; + + dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n"); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "failed to get platform resource mem\n"); + return -ENXIO; + } + + regs = ioremap(res->start, resource_size(res)); + if (!regs) { + dev_err(&pdev->dev, "ioremap failed\n"); + return -ENOMEM; + } + + ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, regs); + if (ret < 0) { + dev_err(&pdev->dev, "udc_probe failed\n"); + goto iounmap; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "IRQ not found\n"); + ret = -ENXIO; + goto udc_remove; + } + + ret = request_irq(irq, msm_udc_irq, IRQF_SHARED, pdev->name, pdev); + if (ret < 0) { + dev_err(&pdev->dev, "request_irq failed\n"); + goto udc_remove; + } + + return 0; + +udc_remove: + udc_remove(); +iounmap: + iounmap(regs); + + return ret; +} + +static struct platform_driver ci13xxx_msm_driver = { + .probe = ci13xxx_msm_probe, + .driver = { .name = "msm_hsusb", }, +}; + +static int __init ci13xxx_msm_init(void) +{ + return platform_driver_register(&ci13xxx_msm_driver); +} +module_init(ci13xxx_msm_init); diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h index 3093ebbea731..ad2114e87511 100644 --- a/drivers/usb/gadget/gadget_chips.h +++ b/drivers/usb/gadget/gadget_chips.h @@ -148,6 +148,12 @@ #define gadget_is_pch(g) 0 #endif +#ifdef CONFIG_USB_GADGET_CI13XXX_MSM +#define gadget_is_ci13xxx_msm(g) (!strcmp("ci13xxx_msm", (g)->name)) +#else +#define gadget_is_ci13xxx_msm(g) 0 +#endif + /** * usb_gadget_controller_number - support bcdDevice id convention * @gadget: the controller being driven @@ -207,6 +213,8 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget) return 0x26; else if (gadget_is_pch(gadget)) return 0x27; + else if (gadget_is_ci13xxx_msm(gadget)) + return 0x28; return -ENOENT; } -- 2.39.5