/**
* This function is used to submit an I/O Request to an EP.
*
* - When the request completes the request's completion callback
* is called to return the request to the driver.
* - An EP, except control EPs, may have multiple requests
* pending.
* - Once submitted the request cannot be examined or modified.
* - Each request is turned into one or more packets.
* - A BULK EP can queue any amount of data; the transfer is
* packetized.
* - Zero length Packets are specified with the request 'zero'
* flag.
*/
static int ep_queue(struct usb_ep *usb_ep, struct usb_request *usb_req,
gfp_t gfp_flags)
{
dwc_otg_pcd_t *pcd;
int retval = 0;
//trace_printk("(%p,%p,%d)\n",
// usb_ep, usb_req, gfp_flags);
if (!usb_req || !usb_req->complete ||
(!gadget_wrapper->gadget.sg_supported &&
!usb_req->buf)) {
DWC_WARN("bad params\n");
return -EINVAL;
}
if (!usb_ep) {
DWC_WARN("bad ep\n");
return -EINVAL;
}
pcd = gadget_wrapper->pcd;
if (!gadget_wrapper->driver ||
gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n",
gadget_wrapper->gadget.speed);
DWC_WARN("bogus device state\n");
return -ESHUTDOWN;
}
//trace_printk( "%s queue req %p, len %d buf %p\n",
// usb_ep->name, usb_req, usb_req->length, usb_req->buf);
usb_req->status = -EINPROGRESS;
usb_req->actual = 0;
retval = dwc_otg_pcd_ep_queue(pcd, usb_ep, usb_req->buf, usb_req->dma/*dma_addr*/,
usb_req->length, usb_req->zero, usb_req->num_sgs,
usb_req->sg, usb_req, gfp_flags == GFP_ATOMIC ? 1 : 0);
if (retval) {
pr_err("%s, cannot enqueue a renquest, err :%d\n", __func__,
retval);
pr_info( "%s queue req %p, len %d buf %p\n",
usb_ep->name, usb_req, usb_req->length, usb_req->buf);
return -EINVAL;
}
return 0;
}
/**
* This function is used to submit an I/O Request to an EP.
*
* - When the request completes the request's completion callback
* is called to return the request to the driver.
* - An EP, except control EPs, may have multiple requests
* pending.
* - Once submitted the request cannot be examined or modified.
* - Each request is turned into one or more packets.
* - A BULK EP can queue any amount of data; the transfer is
* packetized.
* - Zero length Packets are specified with the request 'zero'
* flag.
*/
static int ep_queue(struct usb_ep *usb_ep, struct usb_request *usb_req,
gfp_t gfp_flags)
{
dwc_otg_pcd_t *pcd;
int retval;
DWC_DEBUGPL(DBG_PCDV, "%s(%p,%p,%d)\n",
__func__, usb_ep, usb_req, gfp_flags);
if (!usb_req || !usb_req->complete || !usb_req->buf) {
DWC_WARN("bad params\n");
return -EINVAL;
}
if (!usb_ep) {
DWC_WARN("bad ep\n");
return -EINVAL;
}
pcd = gadget_wrapper->pcd;
if (!gadget_wrapper->driver ||
gadget_wrapper->gadget.speed == USB_SPEED_UNKNOWN) {
DWC_DEBUGPL(DBG_PCDV, "gadget.speed=%d\n",
gadget_wrapper->gadget.speed);
DWC_WARN("bogus device state\n");
return -ESHUTDOWN;
}
DWC_DEBUGPL(DBG_PCD, "%s queue req %p, len %d buf %p\n",
usb_ep->name, usb_req, usb_req->length, usb_req->buf);
usb_req->status = -EINPROGRESS;
usb_req->actual = 0;
retval = dwc_otg_pcd_ep_queue(pcd, usb_ep, usb_req->buf, usb_req->dma,
usb_req->length, usb_req->zero, usb_req,
gfp_flags == GFP_ATOMIC ? 1 : 0);
if (retval) {
return -EINVAL;
}
return 0;
}
static int _setup(dwc_otg_pcd_t *pcd, uint8_t *bytes)
{
DWC_DEBUGPL(DBG_PCD, "%s(): enter \n", __func__);
const usb_device_request_t *ctrlReq = (usb_device_request_t *)bytes;
int value = 0;
int idx;
usb_device_request_t ctrlConvertedReq;
usb_device_request_t *ctrl = &ctrlConvertedReq;
ctrl->bmRequestType = (uByte)(ctrlReq->bmRequestType);
ctrl->bRequest = (uByte)(ctrlReq->bRequest);
ctrl->wValue[0] = ctrlReq->wValue[0];
ctrl->wValue[1] = ctrlReq->wValue[1];
ctrl->wIndex[0] = ctrlReq->wIndex[0];
ctrl->wIndex[1] = ctrlReq->wIndex[1];
ctrl->wLength[0] = ctrlReq->wLength[0];
ctrl->wLength[1] = ctrlReq->wLength[1];
/*
* usually this stores reply data in the pre-allocated ep0 buffer,
* but config change events will reconfigure hardware.
*/
static_data->dl_req.data.zero = 0;
if (UT_GET_RECIPIENT(ctrl->bmRequestType) == UT_INTERFACE) {
if ((UT_GET_DIR(ctrl->bmRequestType) == UT_WRITE)
&& (UGETW(ctrl->wLength) > 0)) {
static_data->dl_req.data.buf =
&static_data->ep0_buffer[0];
DWC_MEMCPY(&static_data->dl_req.out_req, ctrl,
sizeof(*ctrl));
static_data->dl_req.data.length =
DWC_MIN(UGETW(
ctrl->wLength),
static_data->ep0_buffer_size);
// either shorter than asked, or multiple of the MPS require ZLP.
static_data->dl_req.data.zero =
((value < UGETW(ctrl->wLength))
&&
((value %
pcd->ep0.dwc_ep.
maxpacket) ==
0)) ? 1 : 0;
// Elaborate when getting the time.
dwc_otg_pcd_ep_queue(
pcd, /*void* ep_hanlde */ NULL,
static_data->dl_req.data.buf,
(dwc_dma_t)static_data->dl_req.
data.buf,
static_data->dl_req.data.length,
static_data->dl_req.data.zero,
/*void* req_handle */ &static_data
->dl_req, 0);
} else {
static_data->dl_req.data.buf =
&static_data->ep0_buffer[0];
if (static_data->usb_class_handler(ctrl, &value,
&static_data->dl_req
.data.buf) != 0) {
value = -DWC_E_NOT_SUPPORTED;
}
}
} else {
switch (ctrl->bRequest) {
case UR_GET_DESCRIPTOR:
__DWC_ERROR("ctrl->Length = %d \n",
UGETW(ctrl->wLength));
switch (UGETW(ctrl->wValue) >> 8) {
case UDESC_DEVICE:
value =
DWC_MIN(UGETW(ctrl->wLength),
USB_DEVICE_DESCRIPTOR_SIZE);
static_data->dl_req.data.buf = (uint8_t *)
static_data->
usb_device_descriptor;
break;
case UDESC_CONFIG:
value = DWC_MIN(UGETW(ctrl->wLength),
UGETW(static_data->
usb_config_descriptor->
wTotalLength));
static_data->dl_req.data.buf = (uint8_t *)
static_data->
usb_config_descriptor;
break;
case UDESC_OTHER_SPEED_CONFIGURATION:
__DWC_ERROR
(
"UDESC_OTHER_SPEED_CONFIGURATION NOT IMPLEMENTED! \n");
break;
case UDESC_STRING:
/* wIndex == language code.
* this driver only handles one language, you can
* add string tables for other languages, using
* any UTF-8 characters
*/
idx = UGETW(ctrl->wValue) & 0xFF;
__DWC_ERROR("UDESC_STRING idx = %d \n", idx);
__DWC_ERROR(
"UDESC_STRING bLength = %d \n",
&static_data->strings_desc[idx].
bLength);
if (idx > static_data->usb_strings_count) {
if (idx == 0xEE) {
// Microsoft MTP extension
value = 0;
} else {
value = -DWC_E_INVALID;
}
} else {
value = DWC_MIN(UGETW(
ctrl->wLength),
static_data->
strings_desc[idx].
bLength);
static_data->dl_req.data.buf =
(uint8_t *)
&
static_data->strings_desc[idx];
}
break;
}
break;
case UR_SET_CONFIG:
static_data->usb_config = UGETW(ctrl->wValue);
value = 0;
{
int i;
for (i = 0;
i < static_data->usb_num_endpoints;
i++) {
int ret = dwc_otg_pcd_ep_enable(
pcd,
(const
uint8_t
*)&static_data->usb_endpoints[
i],
static_data
->usb_endpoints[i].
bEndpointAddress);
__DWC_WARN(
"Enabled endpoint: %x ret: %d\n",
static_data->usb_endpoints[i
].bEndpointAddress,
ret);
}
struct usb_event evt;
evt.event = USB_EVENT_SET_CONFIG;
evt.event_data.config = static_data->usb_config;
if (static_data->usb_event_cb) {
static_data->usb_event_cb(&evt);
}
}
break;
case UR_GET_CONFIG:
static_data->dl_req.data.buf = &static_data->usb_config;
value = DWC_MIN(UGETW(ctrl->wLength), 1);
break;
/* until we add altsetting support, or other interfaces,
* only 0/0 are possible. pxa2xx only supports 0/0 (poorly)
* and already killed pending endpoint I/O.
*/
case UR_SET_INTERFACE:
value = 0;
break;
case UR_GET_INTERFACE:
__DWC_ERROR("UR_GET_INTERFACE NOT IMPLEMENTED! \n");
goto unknown;
break;
default:
unknown:
value = -DWC_E_NOT_SUPPORTED;
break;
}
}
/* respond with data transfer before status phase? */
__DWC_ERROR("%s(): req.length = %d - max length is 64 \n", __func__,
value);
if (value >= 0) {
static_data->dl_req.data.length = value;
// either shorter than asked, or multiple of the MPS require ZLP.
static_data->dl_req.data.zero = ((value < UGETW(ctrl->wLength))
&& ((value %
pcd->ep0.dwc_ep.maxpacket)
==
0)) ? 1 : 0;
// Elaborate when getting the time.
dwc_otg_pcd_ep_queue(pcd, /*void* ep_hanlde */ NULL,
static_data->dl_req.data.buf,
(dwc_dma_t)static_data->dl_req.data.buf,
static_data->dl_req.data.length,
static_data->dl_req.data.zero,
/*void* req_handle */ NULL, 0);
}
/* device either stalls (value < 0) or reports success */
return value;
}
int usb_ep_write(int ep_address, uint8_t *buf, int len, void *priv)
{
return dwc_otg_pcd_ep_queue(dwc_otg_device->pcd, ep_address, buf, buf,
len, 0, priv, 0);
}