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USB: add dwc_otg_usb_state function for vbus power control.

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This commit is contained in:
wlf
2014-05-22 17:44:22 +08:00
parent 77b2eae948
commit 38d12ba9ca
1 changed files with 41 additions and 0 deletions
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41
drivers/usb/dwc_otg_310/dwc_otg_driver.c
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@@ -570,6 +570,43 @@ static ssize_t dwc_otg_conn_en_store(struct device_driver *_drv,
static DRIVER_ATTR(dwc_otg_conn_en, S_IRUGO | S_IWUSR, dwc_otg_conn_en_show,
dwc_otg_conn_en_store);
/* used for product vbus power control, SDK not need.
* If dwc_otg is host mode, enable vbus power.
* If dwc_otg is device mode, disable vbus power.
* return 1 - host mode, 0 - device mode.
*/
int dwc_otg_usb_state(void)
{
dwc_otg_device_t *otg_dev = g_otgdev;
if (otg_dev) {
/* op_state is A_HOST */
if (1 == otg_dev->core_if->op_state)
return 1;
/* op_state is B_PERIPHERAL */
else if (4 == otg_dev->core_if->op_state)
return 0;
else
return 0;
} else {
DWC_WARN("g_otgdev is NULL, maybe otg probe is failed!\n");
return 0;
}
}
EXPORT_SYMBOL(dwc_otg_usb_state);
static ssize_t dwc_otg_op_state_show(struct device_driver *_drv, char *_buf)
{
dwc_otg_device_t *otg_dev = g_otgdev;
if (otg_dev) {
return sprintf(_buf, "%d\n", otg_dev->core_if->op_state);
} else {
return sprintf(_buf, "%d\n", 0);
}
}
static DRIVER_ATTR(op_state, S_IRUGO, dwc_otg_op_state_show, NULL);
static ssize_t vbus_status_show(struct device_driver *_drv, char *_buf)
{
dwc_otg_device_t *otg_dev = g_otgdev;
@@ -1678,6 +1715,9 @@ static int __init dwc_otg_driver_init(void)
error =
driver_create_file(&dwc_otg_driver.driver,
&driver_attr_force_usb_mode);
error =
driver_create_file(&dwc_otg_driver.driver,
&driver_attr_op_state);
#endif
@@ -1729,6 +1769,7 @@ static void __exit dwc_otg_driver_cleanup(void)
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_version);
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_vbus_status);
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_force_usb_mode);
driver_remove_file(&dwc_otg_driver.driver, &driver_attr_op_state);
platform_driver_unregister(&dwc_otg_driver);
printk(KERN_INFO "%s module removed\n", dwc_otg20_driver_name);
#endif