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usb: ci_udc: Add function to remove usb device

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When unregister gadget driver in ci_udc, the usb device is not
removed or stop. This causes next "usb start" fails to work.

Add a new interface "usb_remove_ehci_gadget" in usb-uclass to
remove the usb device for DM driver. Using "usb_lowlevel_stop" for
non-DM driver.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2020-06-29 10:12:59 +08:00 committed by Marek Vasut
parent 213fa47dac
commit 1468a1cc72
3 changed files with 34 additions and 0 deletions
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7
drivers/usb/gadget/ci_udc.c
View File

@ -1053,6 +1053,13 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
free(controller.items_mem);
free(controller.epts);
#if CONFIG_IS_ENABLED(DM_USB)
usb_remove_ehci_gadget(&controller.ctrl);
#else
usb_lowlevel_stop(0);
controller.ctrl = NULL;
#endif
return 0;
}

18
drivers/usb/host/usb-uclass.c
View File

@ -411,6 +411,24 @@ int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
return 0;
}
int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp)
{
struct udevice *dev;
int ret;
/* Find the old device and remove it */
ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
if (ret)
return ret;
ret = device_remove(dev, DM_REMOVE_NORMAL);
if (ret)
return ret;
*ctlrp = NULL;
return 0;
}
/* returns 0 if no match, 1 if match */
static int usb_match_device(const struct usb_device_descriptor *desc,
const struct usb_device_id *id)

9
include/usb.h
View File

@ -921,6 +921,15 @@ struct ehci_ctrl;
*/
int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
/**
* usb_remove_ehci_gadget() - Remove a gadget USB device
*
* TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
*
* This provides a way to tell a controller to remove a USB device
*/
int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp);
/**
* usb_stor_reset() - Prepare to scan USB storage devices
*