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usb: device: Add transfer cancel helper

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Add usb_cancel_transfers() helper to cancel all ongoing transfers.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
This commit is contained in:
Andrei Emeltchenko 2019-05-16 10:57:03 +03:00 • committed by Carles Cufí
commit bf76b2acc3
2 changed files with 23 additions and 0 deletions
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5
include/usb/usb_device.h
View file

@ -418,6 +418,11 @@ int usb_transfer_sync(u8_t ep, u8_t *data, size_t dlen, unsigned int flags);
*/
void usb_cancel_transfer(u8_t ep);
/**
* @brief Cancel all ongoing transfers
*/
void usb_cancel_transfers(void);
/**
* @brief Check that transfer is ongoing for the endpoint
*

18
subsys/usb/usb_device.c
View file

@ -1419,6 +1419,24 @@ done:
irq_unlock(key);
}
void usb_cancel_transfers(void)
{
for (int i = 0; i < ARRAY_SIZE(usb_dev.transfer); i++) {
struct usb_transfer_data *trans = &usb_dev.transfer[i];
unsigned int key;
key = irq_lock();
if (trans->status == -EBUSY) {
trans->status = -ECANCELED;
k_work_submit(&trans->work);
LOG_DBG("Cancel transfer");
}
irq_unlock(key);
}
}
struct usb_transfer_sync_priv {
int tsize;
struct k_sem sem;