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s3c-hsudc: Add basic otg transceiver handling 

Makes it possible to use i.e. gpio-vbus to handle vbus events.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Heiko Stübner 2011-08-21 14:32:14 +02:00 committed by Greg Kroah-Hartman
parent da4fc14c99
commit 938fbe54f3
1 changed files with 23 additions and 0 deletions
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23
drivers/usb/gadget/s3c-hsudc.c
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@ -26,6 +26,7 @@
#include <linux/clk.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/prefetch.h>
#include <mach/regs-s3c2443-clock.h>
@ -137,6 +138,7 @@ struct s3c_hsudc {
struct usb_gadget_driver *driver;
struct device *dev;
struct s3c24xx_hsudc_platdata *pd;
struct otg_transceiver *transceiver;
spinlock_t lock;
void __iomem *regs;
struct resource *mem_rsrc;
@ -1171,6 +1173,22 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
return ret;
}
/* connect to bus through transceiver */
if (hsudc->transceiver) {
ret = otg_set_peripheral(hsudc->transceiver, &hsudc->gadget);
if (ret) {
dev_err(hsudc->dev, "%s: can't bind to transceiver\n",
hsudc->gadget.name);
driver->unbind(&hsudc->gadget);
device_del(&hsudc->gadget.dev);
hsudc->driver = NULL;
hsudc->gadget.dev.driver = NULL;
return ret;
}
}
enable_irq(hsudc->irq);
dev_info(hsudc->dev, "bound driver %s\n", driver->driver.name);
@ -1201,6 +1219,9 @@ static int s3c_hsudc_stop(struct usb_gadget_driver *driver)
s3c_hsudc_stop_activity(hsudc, driver);
spin_unlock_irqrestore(&hsudc->lock, flags);
if (hsudc->transceiver)
(void) otg_set_peripheral(hsudc->transceiver, NULL);
driver->unbind(&hsudc->gadget);
device_del(&hsudc->gadget.dev);
disable_irq(hsudc->irq);
@ -1247,6 +1268,8 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
hsudc->dev = dev;
hsudc->pd = pdev->dev.platform_data;
hsudc->transceiver = otg_get_transceiver();
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "unable to obtain driver resource data\n");