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usb: gadget: aspeed: Cleanup EP0 state on port reset 

Otherwise, we can have a stale state after a disconnect and reconnect
causing errors on the first SETUP packet to the device.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Benjamin Herrenschmidt 2019-07-26 15:05:31 +10:00 committed by Felipe Balbi
parent 9fbbeb4eff
commit d042c35eb8
3 changed files with 13 additions and 0 deletions
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3
drivers/usb/gadget/udc/aspeed-vhub/dev.c
View File

@ -55,6 +55,9 @@ static void ast_vhub_dev_enable(struct ast_vhub_dev *d)
if (d->enabled)
return;
/* Cleanup EP0 state */
ast_vhub_reset_ep0(d);
/* Enable device and its EP0 interrupts */
reg = VHUB_DEV_EN_ENABLE_PORT |
VHUB_DEV_EN_EP0_IN_ACK_IRQEN |

9
drivers/usb/gadget/udc/aspeed-vhub/ep0.c
View File

@ -459,6 +459,15 @@ static const struct usb_ep_ops ast_vhub_ep0_ops = {
.free_request = ast_vhub_free_request,
};
void ast_vhub_reset_ep0(struct ast_vhub_dev *dev)
{
struct ast_vhub_ep *ep = &dev->ep0;
ast_vhub_nuke(ep, -EIO);
ep->ep0.state = ep0_state_token;
}
void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep,
struct ast_vhub_dev *dev)
{

1
drivers/usb/gadget/udc/aspeed-vhub/vhub.h
View File

@ -507,6 +507,7 @@ void ast_vhub_init_hw(struct ast_vhub *vhub);
/* ep0.c */
void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack);
void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep);
void ast_vhub_reset_ep0(struct ast_vhub_dev *dev);
void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep,
struct ast_vhub_dev *dev);
int ast_vhub_reply(struct ast_vhub_ep *ep, char *ptr, int len);