From: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx>
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 <pkondeti@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
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(+), 0 deletions(-)
create mode 100644 drivers/usb/gadget/ci13xxx_msm.c
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 6bcbcb0..7201b4e 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 f53fda7..fbf5db4 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 0000000..c497337
--- /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 <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/msm_hsusb_hw.h>
+#include <linux/usb/ulpi.h>
+
+#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 3093ebb..ad2114e 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;
}
--
1.7.3.2
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