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stm32/usbdev: Fix USBD setup request handler to use correct recipient. 

Prior to this patch the USBD driver did not handle the recipient correctly
for setup requests.  It was not interpreting the req->wIndex field in the
right way: in some cases this field indicates the endpoint number but the
code was assuming it always indicated the interface number.

This patch fixes this.  The only noticeable change is to the MSC
interface, which should now correctly respond to the USB_REQ_CLEAR_FEATURE
request and hence unmount properly from the host when requested.
pull/1/head
Damien George 2018-02-12 17:22:59 +11:00
parent 02f88cb2df
commit 8e1cb58a23
1 changed files with 39 additions and 9 deletions
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48
ports/stm32/usbdev/class/src/usbd_cdc_msc_hid.c
View File

@ -821,13 +821,45 @@ static uint8_t USBD_CDC_MSC_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTyp
usbd_cdc_msc_hid_state_t *usbd = pdev->pClassData;
// Work out the recipient of the setup request
uint8_t mode = usbd->usbd_mode;
uint8_t recipient = 0;
switch (req->bmRequest & USB_REQ_RECIPIENT_MASK) {
case USB_REQ_RECIPIENT_INTERFACE: {
uint16_t iface = req->wIndex;
if ((mode & USBD_MODE_CDC) && iface == usbd->cdc_iface_num) {
recipient = USBD_MODE_CDC;
} else if ((mode & USBD_MODE_MSC) && iface == MSC_IFACE_NUM_WITH_CDC) {
recipient = USBD_MODE_MSC;
} else if ((mode & USBD_MODE_HID) && iface == usbd->hid_iface_num) {
recipient = USBD_MODE_HID;
}
break;
}
case USB_REQ_RECIPIENT_ENDPOINT: {
uint8_t ep = req->wIndex & 0x7f;
if ((mode & USBD_MODE_CDC) && (ep == CDC_OUT_EP || ep == (CDC_CMD_EP & 0x7f))) {
recipient = USBD_MODE_CDC;
} else if ((mode & USBD_MODE_MSC) && ep == MSC_OUT_EP) {
recipient = USBD_MODE_MSC;
} else if ((mode & USBD_MODE_HID) && ep == usbd->hid_out_ep) {
recipient = USBD_MODE_HID;
}
break;
}
}
// Fail the request if we didn't have a valid recipient
if (recipient == 0) {
USBD_CtlError(pdev, req);
return USBD_FAIL;
}
switch (req->bmRequest & USB_REQ_TYPE_MASK) {
// Class request
case USB_REQ_TYPE_CLASS:
// req->wIndex is the recipient interface number
if ((usbd->usbd_mode & USBD_MODE_CDC) && req->wIndex == usbd->cdc_iface_num) {
// CDC component
if (recipient == USBD_MODE_CDC) {
if (req->wLength) {
if (req->bmRequest & 0x80) {
// device-to-host request
@ -844,8 +876,7 @@ static uint8_t USBD_CDC_MSC_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTyp
// Transfer the command to the interface layer
return usbd_cdc_control(usbd->cdc, req->bRequest, NULL, req->wValue);
}
} else if ((usbd->usbd_mode & USBD_MODE_MSC) && req->wIndex == MSC_IFACE_NUM_WITH_CDC) {
// MSC component
} else if (recipient == USBD_MODE_MSC) {
switch (req->bRequest) {
case BOT_GET_MAX_LUN:
if ((req->wValue == 0) && (req->wLength == 1) && ((req->bmRequest & 0x80) == 0x80)) {
@ -870,7 +901,7 @@ static uint8_t USBD_CDC_MSC_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTyp
USBD_CtlError(pdev, req);
return USBD_FAIL;
}
} else if ((usbd->usbd_mode & USBD_MODE_HID) && req->wIndex == usbd->hid_iface_num) {
} else if (recipient == USBD_MODE_HID) {
switch (req->bRequest) {
case HID_REQ_SET_PROTOCOL:
usbd->HID_ClassData.Protocol = (uint8_t)(req->wValue);
@ -895,9 +926,8 @@ static uint8_t USBD_CDC_MSC_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTyp
}
break;
// Interface & Endpoint request
case USB_REQ_TYPE_STANDARD:
if ((usbd->usbd_mode & USBD_MODE_MSC) && req->wIndex == MSC_IFACE_NUM_WITH_CDC) {
if (recipient == USBD_MODE_MSC) {
switch (req->bRequest) {
case USB_REQ_GET_INTERFACE :
USBD_CtlSendData(pdev, (uint8_t *)&usbd->MSC_BOT_ClassData.interface, 1);
@ -924,7 +954,7 @@ static uint8_t USBD_CDC_MSC_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTyp
MSC_BOT_CplClrFeature(pdev, (uint8_t)req->wIndex);
break;
}
} else if ((usbd->usbd_mode & USBD_MODE_HID) && req->wIndex == usbd->hid_iface_num) {
} else if (recipient == USBD_MODE_HID) {
switch (req->bRequest) {
case USB_REQ_GET_DESCRIPTOR: {
uint16_t len = 0;