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usb-debug: add force uart mode

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write 1 to /sys/bus/platform/drivers/usb20_otg/dwc_otg_force_uart
can stop check_vbus_timer and force usb_phy bypass to uart mode

write 0 comes back to normal usb operate mode
This commit is contained in:
lyz
2013-09-16 15:45:16 +08:00
parent 6d3da060db
commit 09a17666a3
1 changed files with 59 additions and 0 deletions
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59
drivers/usb/dwc_otg/dwc_otg_driver.c
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@@ -602,6 +602,55 @@ static ssize_t dwc_otg_conn_en_store(struct device_driver *_drv, const char *_bu
return _count;
}
static DRIVER_ATTR(dwc_otg_conn_en, S_IRUGO|S_IWUSR, dwc_otg_conn_en_show, dwc_otg_conn_en_store);
#ifdef CONFIG_RK_USB_UART
extern int get_gadget_connect_flag(void);
extern int dwc_vbus_status(void);
/*
write 1 to /sys/bus/platform/drivers/usb20_otg/dwc_otg_force_uart
can stop check_vbus_timer and force usb_phy bypass to uart mode
write 0 comes back to normal usb operate mode
*/
static ssize_t dwc_otg_force_uart_store(struct device_driver *_drv, const char *_buf,
size_t _count)
{
int enable = simple_strtoul(_buf, NULL, 10);
dwc_otg_device_t *otg_dev = g_otgdev;
dwc_otg_pcd_t *_pcd = otg_dev->pcd;
struct dwc_otg_platform_data *pldata = otg_dev->pldata;
if(1 == enable)
{
if(!get_gadget_connect_flag() &&
dwc_otg_is_device_mode(otg_dev->core_if))
{
disable_irq(IRQ_OTG_BVALID);
del_timer(&_pcd->check_vbus_timer);
pldata->phy_suspend(pldata,USB_PHY_SUSPEND);
pldata->dwc_otg_uart_mode(pldata,PHY_UART_MODE);
_pcd->vbus_status = 2;
}
else
printk("mode mismatch!\n");
}
if(0 == enable)
{
_pcd->vbus_status == 0;
_pcd->vbus_status = 0;
pldata->dwc_otg_uart_mode(pldata,PHY_USB_MODE);
dwc_otg_pcd_start_vbus_timer(_pcd);
enable_irq(IRQ_OTG_BVALID);
}
return _count;
}
static DRIVER_ATTR(dwc_otg_force_uart, S_IRUGO|S_IWUSR, NULL, dwc_otg_force_uart_store);
#endif
#ifndef CONFIG_DWC_OTG_HOST_ONLY
static ssize_t vbus_status_show(struct device_driver *_drv, char *_buf)
{
@@ -1726,6 +1775,11 @@ static int __init dwc_otg_driver_init(void)
if(driver_create_file(&dwc_otg_driver.driver, &driver_attr_dwc_otg_conn_en))
pr_warning("DWC_OTG: Failed to create driver dwc_otg_conn_en file");
#endif
#ifdef CONFIG_RK_USB_UART
if(driver_create_file(&dwc_otg_driver.driver, &driver_attr_dwc_otg_force_uart))
pr_warning("DWC_OTG: Failed to create driver dwc_otg_force_uart file");
#endif
#ifndef CONFIG_DWC_OTG_HOST_ONLY
if(driver_create_file(&dwc_otg_driver.driver, &driver_attr_vbus_status))
pr_warning("DWC_OTG: Failed to create driver vbus status file");
@@ -1784,6 +1838,11 @@ static void __exit dwc_otg_driver_cleanup(void)
#ifndef CONFIG_DWC_OTG_HOST_ONLY
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_dwc_otg_conn_en);
#endif
#ifdef CONFIG_RK_USB_UART
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_dwc_otg_force_uart);
#endif
#ifndef CONFIG_DWC_OTG_HOST_ONLY
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_vbus_status);
#endif