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authorAnatolij Gustschin <agust@denx.de>2011-04-18 22:02:00 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-02 16:59:38 -0700
commit83722bc9430424de1614ff31696f73a40b3d81a9 (patch)
tree4ff0ffe40e080ee03b9ede04b3e943b79335335f /drivers/usb/gadget
parent0807c500a1a6d7fa20cbd7bbe7fea14a66112463 (diff)
downloadvexpress-lsk-83722bc9430424de1614ff31696f73a40b3d81a9.tar.gz
USB: extend ehci-fsl and fsl_udc_core driver for OTG operation
Signed-off-by: Anatolij Gustschin <agust@denx.de> Cc: Li Yang <leoli@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/fsl_udc_core.c147
-rw-r--r--drivers/usb/gadget/fsl_usb2_udc.h2
2 files changed, 134 insertions, 15 deletions
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 28b3a9f25f3..999eafe8965 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -353,6 +353,19 @@ static void dr_controller_stop(struct fsl_udc *udc)
{
unsigned int tmp;
+ pr_debug("%s\n", __func__);
+
+ /* if we're in OTG mode, and the Host is currently using the port,
+ * stop now and don't rip the controller out from under the
+ * ehci driver
+ */
+ if (udc->gadget.is_otg) {
+ if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
+ pr_debug("udc: Leaving early\n");
+ return;
+ }
+ }
+
/* disable all INTR */
fsl_writel(0, &dr_regs->usbintr);
@@ -1668,6 +1681,9 @@ static void port_change_irq(struct fsl_udc *udc)
{
u32 speed;
+ if (udc->bus_reset)
+ udc->bus_reset = 0;
+
/* Bus resetting is finished */
if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
/* Get the speed */
@@ -1775,6 +1791,8 @@ static void reset_irq(struct fsl_udc *udc)
if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
VDBG("Bus reset");
+ /* Bus is reseting */
+ udc->bus_reset = 1;
/* Reset all the queues, include XD, dTD, EP queue
* head and TR Queue */
reset_queues(udc);
@@ -1852,6 +1870,7 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
/* Reset Received */
if (irq_src & USB_STS_RESET) {
+ VDBG("reset int");
reset_irq(udc);
status = IRQ_HANDLED;
}
@@ -1909,11 +1928,30 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
goto out;
}
- /* Enable DR IRQ reg and Set usbcmd reg Run bit */
- dr_controller_run(udc_controller);
- udc_controller->usb_state = USB_STATE_ATTACHED;
- udc_controller->ep0_state = WAIT_FOR_SETUP;
- udc_controller->ep0_dir = 0;
+ if (udc_controller->transceiver) {
+ /* Suspend the controller until OTG enable it */
+ udc_controller->stopped = 1;
+ printk(KERN_INFO "Suspend udc for OTG auto detect\n");
+
+ /* connect to bus through transceiver */
+ if (udc_controller->transceiver) {
+ retval = otg_set_peripheral(udc_controller->transceiver,
+ &udc_controller->gadget);
+ if (retval < 0) {
+ ERR("can't bind to transceiver\n");
+ driver->unbind(&udc_controller->gadget);
+ udc_controller->gadget.dev.driver = 0;
+ udc_controller->driver = 0;
+ return retval;
+ }
+ }
+ } else {
+ /* Enable DR IRQ reg and set USBCMD reg Run bit */
+ dr_controller_run(udc_controller);
+ udc_controller->usb_state = USB_STATE_ATTACHED;
+ udc_controller->ep0_state = WAIT_FOR_SETUP;
+ udc_controller->ep0_dir = 0;
+ }
printk(KERN_INFO "%s: bind to driver %s\n",
udc_controller->gadget.name, driver->driver.name);
@@ -2374,17 +2412,30 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
spin_lock_init(&udc_controller->lock);
udc_controller->stopped = 1;
+#ifdef CONFIG_USB_OTG
+ if (pdata->operating_mode == FSL_USB2_DR_OTG) {
+ udc_controller->transceiver = otg_get_transceiver();
+ if (!udc_controller->transceiver) {
+ ERR("Can't find OTG driver!\n");
+ ret = -ENODEV;
+ goto err_kfree;
+ }
+ }
+#endif
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENXIO;
goto err_kfree;
}
- if (!request_mem_region(res->start, res->end - res->start + 1,
- driver_name)) {
- ERR("request mem region for %s failed\n", pdev->name);
- ret = -EBUSY;
- goto err_kfree;
+ if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
+ if (!request_mem_region(res->start, res->end - res->start + 1,
+ driver_name)) {
+ ERR("request mem region for %s failed\n", pdev->name);
+ ret = -EBUSY;
+ goto err_kfree;
+ }
}
dr_regs = ioremap(res->start, resource_size(res));
@@ -2455,9 +2506,11 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
goto err_free_irq;
}
- /* initialize usb hw reg except for regs for EP,
- * leave usbintr reg untouched */
- dr_controller_setup(udc_controller);
+ if (!udc_controller->transceiver) {
+ /* initialize usb hw reg except for regs for EP,
+ * leave usbintr reg untouched */
+ dr_controller_setup(udc_controller);
+ }
fsl_udc_clk_finalize(pdev);
@@ -2477,6 +2530,9 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
if (ret < 0)
goto err_free_irq;
+ if (udc_controller->transceiver)
+ udc_controller->gadget.is_otg = 1;
+
/* setup QH and epctrl for ep0 */
ep0_setup(udc_controller);
@@ -2521,7 +2577,8 @@ err_iounmap:
err_iounmap_noclk:
iounmap(dr_regs);
err_release_mem_region:
- release_mem_region(res->start, res->end - res->start + 1);
+ if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
+ release_mem_region(res->start, res->end - res->start + 1);
err_kfree:
kfree(udc_controller);
udc_controller = NULL;
@@ -2555,7 +2612,8 @@ static int __exit fsl_udc_remove(struct platform_device *pdev)
dma_pool_destroy(udc_controller->td_pool);
free_irq(udc_controller->irq, udc_controller);
iounmap(dr_regs);
- release_mem_region(res->start, res->end - res->start + 1);
+ if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
+ release_mem_region(res->start, res->end - res->start + 1);
device_unregister(&udc_controller->gadget.dev);
/* free udc --wait for the release() finished */
@@ -2598,6 +2656,62 @@ static int fsl_udc_resume(struct platform_device *pdev)
return 0;
}
+static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
+{
+ struct fsl_udc *udc = udc_controller;
+ u32 mode, usbcmd;
+
+ mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
+
+ pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
+
+ /*
+ * If the controller is already stopped, then this must be a
+ * PM suspend. Remember this fact, so that we will leave the
+ * controller stopped at PM resume time.
+ */
+ if (udc->stopped) {
+ pr_debug("gadget already stopped, leaving early\n");
+ udc->already_stopped = 1;
+ return 0;
+ }
+
+ if (mode != USB_MODE_CTRL_MODE_DEVICE) {
+ pr_debug("gadget not in device mode, leaving early\n");
+ return 0;
+ }
+
+ /* stop the controller */
+ usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
+ fsl_writel(usbcmd, &dr_regs->usbcmd);
+
+ udc->stopped = 1;
+
+ pr_info("USB Gadget suspended\n");
+
+ return 0;
+}
+
+static int fsl_udc_otg_resume(struct device *dev)
+{
+ pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
+ udc_controller->stopped, udc_controller->already_stopped);
+
+ /*
+ * If the controller was stopped at suspend time, then
+ * don't resume it now.
+ */
+ if (udc_controller->already_stopped) {
+ udc_controller->already_stopped = 0;
+ pr_debug("gadget was already stopped, leaving early\n");
+ return 0;
+ }
+
+ pr_info("USB Gadget resume\n");
+
+ return fsl_udc_resume(NULL);
+}
+
/*-------------------------------------------------------------------------
Register entry point for the peripheral controller driver
--------------------------------------------------------------------------*/
@@ -2610,6 +2724,9 @@ static struct platform_driver udc_driver = {
.driver = {
.name = (char *)driver_name,
.owner = THIS_MODULE,
+ /* udc suspend/resume called from OTG driver */
+ .suspend = fsl_udc_otg_suspend,
+ .resume = fsl_udc_otg_resume,
},
};
diff --git a/drivers/usb/gadget/fsl_usb2_udc.h b/drivers/usb/gadget/fsl_usb2_udc.h
index 5647cc21b84..1d51be83fda 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.h
+++ b/drivers/usb/gadget/fsl_usb2_udc.h
@@ -476,6 +476,7 @@ struct fsl_udc {
unsigned vbus_active:1;
unsigned stopped:1;
unsigned remote_wakeup:1;
+ unsigned already_stopped:1;
unsigned big_endian_desc:1;
struct ep_queue_head *ep_qh; /* Endpoints Queue-Head */
@@ -487,6 +488,7 @@ struct fsl_udc {
dma_addr_t ep_qh_dma; /* dma address of QH */
u32 max_pipes; /* Device max pipes */
+ u32 bus_reset; /* Device is bus resetting */
u32 resume_state; /* USB state to resume */
u32 usb_state; /* USB current state */
u32 ep0_state; /* Endpoint zero state */