static void usb_handle_setup_req(struct usb_setup_req *req)
{
switch (req->bRequest) {
case USB_REQ_GET_DESCRIPTOR:
usb_handle_get_desc(req);
break;
case USB_REQ_SET_ADDRESS:
clr_set_reg(USB_DEVCMDSTAT, USB_DEVCMDSTAT_DEV_ADDR(~0),
USB_DEVCMDSTAT_DEV_ADDR(req->wValue));
usb_send_zlp(&usb_ep_data[0]);
break;
case USB_REQ_GET_CONFIGURATION: {
u8 config = usb_state == USB_STATE_ONLINE;
usb_debug("get_config(%d)\n", config);
usb_ep_write(&usb_ep_data[0], &config, 1);
break;
}
case USB_REQ_SET_CONFIGURATION:
usb_handle_set_config(req->wValue);
break;
default:
usb_debug("unknown setup req:\n");
usb_debug(" bmRequestType: %b\n", req->bmRequestType);
usb_debug(" dir: %b\n", req->t.dir);
usb_debug(" type: %b\n", req->t.type);
usb_debug(" rcpt: %b\n", req->t.rcpt);
usb_debug(" bRequest: %b\n", req->bRequest);
usb_debug(" wValue: %h\n", req->wValue);
usb_debug(" wIndex: %h\n", req->wIndex);
usb_debug(" wLength: %h\n", req->wLength);
usb_nak(&usb_ep_data[0]);
break;
}
}
/*------------------------------------------------------------------------*
* usb_handle_request
*
* Internal state sequence:
*
* USB_HR_NOT_COMPLETE -> USB_HR_COMPLETE_OK v USB_HR_COMPLETE_ERR
*
* Returns:
* 0: Ready to start hardware
* Else: Stall current transfer, if any
*------------------------------------------------------------------------*/
static usb_error_t
usb_handle_request(struct usb_xfer *xfer)
{
struct usb_device_request req;
struct usb_device *udev;
const void *src_zcopy; /* zero-copy source pointer */
const void *src_mcopy; /* non zero-copy source pointer */
uint16_t off; /* data offset */
uint16_t rem; /* data remainder */
uint16_t max_len; /* max fragment length */
uint16_t wValue;
uint16_t wIndex;
uint8_t state;
uint8_t is_complete = 1;
usb_error_t err;
union {
uWord wStatus;
uint8_t buf[2];
} temp;
/*
* Filter the USB transfer state into
* something which we understand:
*/
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
state = USB_HR_NOT_COMPLETE;
if (!xfer->flags_int.control_act) {
/* nothing to do */
goto tr_stalled;
}
break;
case USB_ST_TRANSFERRED:
if (!xfer->flags_int.control_act) {
state = USB_HR_COMPLETE_OK;
} else {
state = USB_HR_NOT_COMPLETE;
}
break;
default:
state = USB_HR_COMPLETE_ERR;
break;
}
/* reset frame stuff */
usbd_xfer_set_frame_len(xfer, 0, 0);
usbd_xfer_set_frame_offset(xfer, 0, 0);
usbd_xfer_set_frame_offset(xfer, sizeof(req), 1);
/* get the current request, if any */
usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req));
if (xfer->flags_int.control_rem == 0xFFFF) {
/* first time - not initialised */
rem = UGETW(req.wLength);
off = 0;
} else {
/* not first time - initialised */
rem = xfer->flags_int.control_rem;
off = UGETW(req.wLength) - rem;
}
/* set some defaults */
max_len = 0;
src_zcopy = NULL;
src_mcopy = NULL;
udev = xfer->xroot->udev;
/* get some request fields decoded */
wValue = UGETW(req.wValue);
wIndex = UGETW(req.wIndex);
DPRINTF("req 0x%02x 0x%02x 0x%04x 0x%04x "
"off=0x%x rem=0x%x, state=%d\n", req.bmRequestType,
req.bRequest, wValue, wIndex, off, rem, state);
/* demultiplex the control request */
switch (req.bmRequestType) {
case UT_READ_DEVICE:
if (state != USB_HR_NOT_COMPLETE) {
break;
}
switch (req.bRequest) {
case UR_GET_DESCRIPTOR:
goto tr_handle_get_descriptor;
case UR_GET_CONFIG:
goto tr_handle_get_config;
case UR_GET_STATUS:
goto tr_handle_get_status;
default:
goto tr_stalled;
}
break;
case UT_WRITE_DEVICE:
switch (req.bRequest) {
case UR_SET_ADDRESS:
goto tr_handle_set_address;
case UR_SET_CONFIG:
goto tr_handle_set_config;
case UR_CLEAR_FEATURE:
switch (wValue) {
case UF_DEVICE_REMOTE_WAKEUP:
goto tr_handle_clear_wakeup;
default:
goto tr_stalled;
}
break;
case UR_SET_FEATURE:
switch (wValue) {
case UF_DEVICE_REMOTE_WAKEUP:
goto tr_handle_set_wakeup;
default:
goto tr_stalled;
}
break;
default:
goto tr_stalled;
}
break;
case UT_WRITE_ENDPOINT:
switch (req.bRequest) {
case UR_CLEAR_FEATURE:
switch (wValue) {
case UF_ENDPOINT_HALT:
goto tr_handle_clear_halt;
default:
goto tr_stalled;
}
break;
case UR_SET_FEATURE:
switch (wValue) {
case UF_ENDPOINT_HALT:
goto tr_handle_set_halt;
default:
goto tr_stalled;
}
break;
default:
goto tr_stalled;
}
break;
case UT_READ_ENDPOINT:
switch (req.bRequest) {
case UR_GET_STATUS:
goto tr_handle_get_ep_status;
default:
goto tr_stalled;
}
break;
default:
/* we use "USB_ADD_BYTES" to de-const the src_zcopy */
err = usb_handle_iface_request(xfer,
USB_ADD_BYTES(&src_zcopy, 0),
&max_len, req, off, state);
if (err == 0) {
is_complete = 0;
goto tr_valid;
} else if (err == USB_ERR_SHORT_XFER) {
goto tr_valid;
}
/*
* Reset zero-copy pointer and max length
* variable in case they were unintentionally
* set:
*/
src_zcopy = NULL;
max_len = 0;
/*
* Check if we have a vendor specific
* descriptor:
*/
goto tr_handle_get_descriptor;
}
goto tr_valid;
tr_handle_get_descriptor:
err = (usb_temp_get_desc_p) (udev, &req, &src_zcopy, &max_len);
if (err)
goto tr_stalled;
if (src_zcopy == NULL)
goto tr_stalled;
goto tr_valid;
tr_handle_get_config:
temp.buf[0] = udev->curr_config_no;
src_mcopy = temp.buf;
max_len = 1;
goto tr_valid;
tr_handle_get_status:
wValue = 0;
USB_BUS_LOCK(udev->bus);
if (udev->flags.remote_wakeup) {
wValue |= UDS_REMOTE_WAKEUP;
}
if (udev->flags.self_powered) {
wValue |= UDS_SELF_POWERED;
}
USB_BUS_UNLOCK(udev->bus);
USETW(temp.wStatus, wValue);
src_mcopy = temp.wStatus;
max_len = sizeof(temp.wStatus);
goto tr_valid;
tr_handle_set_address:
if (state == USB_HR_NOT_COMPLETE) {
if (wValue >= 0x80) {
/* invalid value */
goto tr_stalled;
} else if (udev->curr_config_no != 0) {
/* we are configured ! */
goto tr_stalled;
}
} else if (state != USB_HR_NOT_COMPLETE) {
udev->address = (wValue & 0x7F);
goto tr_bad_context;
}
goto tr_valid;
tr_handle_set_config:
if (state == USB_HR_NOT_COMPLETE) {
if (usb_handle_set_config(xfer, req.wValue[0])) {
goto tr_stalled;
}
}
goto tr_valid;
tr_handle_clear_halt:
if (state == USB_HR_NOT_COMPLETE) {
if (usb_handle_set_stall(xfer, req.wIndex[0], 0)) {
goto tr_stalled;
}
}
goto tr_valid;
tr_handle_clear_wakeup:
if (state == USB_HR_NOT_COMPLETE) {
if (usb_handle_remote_wakeup(xfer, 0)) {
goto tr_stalled;
}
}
goto tr_valid;
tr_handle_set_halt:
if (state == USB_HR_NOT_COMPLETE) {
if (usb_handle_set_stall(xfer, req.wIndex[0], 1)) {
goto tr_stalled;
}
}
goto tr_valid;
tr_handle_set_wakeup:
if (state == USB_HR_NOT_COMPLETE) {
if (usb_handle_remote_wakeup(xfer, 1)) {
goto tr_stalled;
}
}
goto tr_valid;
tr_handle_get_ep_status:
if (state == USB_HR_NOT_COMPLETE) {
temp.wStatus[0] =
usb_handle_get_stall(udev, req.wIndex[0]);
temp.wStatus[1] = 0;
src_mcopy = temp.wStatus;
max_len = sizeof(temp.wStatus);
}
goto tr_valid;
tr_valid:
if (state != USB_HR_NOT_COMPLETE) {
goto tr_stalled;
}
/* subtract offset from length */
max_len -= off;
/* Compute the real maximum data length */
if (max_len > xfer->max_data_length) {
max_len = usbd_xfer_max_len(xfer);
}
if (max_len > rem) {
max_len = rem;
}
/*
* If the remainder is greater than the maximum data length,
* we need to truncate the value for the sake of the
* comparison below:
*/
if (rem > xfer->max_data_length) {
rem = usbd_xfer_max_len(xfer);
}
if ((rem != max_len) && (is_complete != 0)) {
/*
* If we don't transfer the data we can transfer, then
* the transfer is short !
*/
xfer->flags.force_short_xfer = 1;
xfer->nframes = 2;
} else {
/*
* Default case
*/
xfer->flags.force_short_xfer = 0;
xfer->nframes = max_len ? 2 : 1;
}
if (max_len > 0) {
if (src_mcopy) {
src_mcopy = USB_ADD_BYTES(src_mcopy, off);
usbd_copy_in(xfer->frbuffers + 1, 0,
src_mcopy, max_len);
usbd_xfer_set_frame_len(xfer, 1, max_len);
} else {
usbd_xfer_set_frame_data(xfer, 1,
USB_ADD_BYTES(src_zcopy, off), max_len);
}
} else {
/* the end is reached, send status */
xfer->flags.manual_status = 0;
usbd_xfer_set_frame_len(xfer, 1, 0);
}
DPRINTF("success\n");
return (0); /* success */
tr_stalled:
DPRINTF("%s\n", (state != USB_HR_NOT_COMPLETE) ?
"complete" : "stalled");
return (USB_ERR_STALLED);
tr_bad_context:
DPRINTF("bad context\n");
return (USB_ERR_BAD_CONTEXT);
}
