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rt-thread-official/components/drivers/usb/cherryusb/class/video/usbh_video.c

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/*
* Copyright (c) 2022, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbh_core.h"
#include "usbh_video.h"
#undef USB_DBG_TAG
#define USB_DBG_TAG "usbh_video"
#include "usb_log.h"
#define DEV_FORMAT "/dev/video%d"
/* general descriptor field offsets */
#define DESC_bLength 0 /** Length offset */
#define DESC_bDescriptorType 1 /** Descriptor type offset */
#define DESC_bDescriptorSubType 2 /** Descriptor subtype offset */
#define DESC_bNumFormats 3 /** Descriptor numformat offset */
#define DESC_bNumFrameDescriptors 4 /** Descriptor numframe offset */
#define DESC_bFormatIndex 3 /** Descriptor format index offset */
#define DESC_bFrameIndex 3 /** Descriptor frame index offset */
/* interface descriptor field offsets */
#define INTF_DESC_bInterfaceNumber 2 /** Interface number offset */
#define INTF_DESC_bAlternateSetting 3 /** Alternate setting offset */
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_video_buf[128];
static const char *format_type[] = { "uncompressed", "mjpeg" };
static struct usbh_video g_video_class[CONFIG_USBHOST_MAX_VIDEO_CLASS];
static uint32_t g_devinuse = 0;
static struct usbh_video *usbh_video_class_alloc(void)
{
uint8_t devno;
for (devno = 0; devno < CONFIG_USBHOST_MAX_VIDEO_CLASS; devno++) {
if ((g_devinuse & (1U << devno)) == 0) {
g_devinuse |= (1U << devno);
memset(&g_video_class[devno], 0, sizeof(struct usbh_video));
g_video_class[devno].minor = devno;
return &g_video_class[devno];
}
}
return NULL;
}
static void usbh_video_class_free(struct usbh_video *video_class)
{
uint8_t devno = video_class->minor;
if (devno < 32) {
g_devinuse &= ~(1U << devno);
}
memset(video_class, 0, sizeof(struct usbh_video));
}
int usbh_video_get(struct usbh_video *video_class, uint8_t request, uint8_t intf, uint8_t entity_id, uint8_t cs, uint8_t *buf, uint16_t len)
{
struct usb_setup_packet *setup;
int ret;
uint8_t retry;
if (!video_class || !video_class->hport) {
return -USB_ERR_INVAL;
}
setup = video_class->hport->setup;
setup->bmRequestType = USB_REQUEST_DIR_IN | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = request;
setup->wValue = cs << 8;
setup->wIndex = (entity_id << 8) | intf;
setup->wLength = len;
retry = 0;
while (1) {
ret = usbh_control_transfer(video_class->hport, setup, g_video_buf);
if (ret > 0) {
break;
}
retry++;
if (retry == 3) {
return ret;
}
}
if (buf) {
memcpy(buf, g_video_buf, len);
}
return ret;
}
int usbh_video_set(struct usbh_video *video_class, uint8_t request, uint8_t intf, uint8_t entity_id, uint8_t cs, uint8_t *buf, uint16_t len)
{
struct usb_setup_packet *setup;
int ret;
if (!video_class || !video_class->hport) {
return -USB_ERR_INVAL;
}
setup = video_class->hport->setup;
setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_CLASS | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = request;
setup->wValue = cs << 8;
setup->wIndex = (entity_id << 8) | intf;
setup->wLength = len;
memcpy(g_video_buf, buf, len);
ret = usbh_control_transfer(video_class->hport, setup, g_video_buf);
usb_osal_msleep(50);
return ret;
}
int usbh_videostreaming_get_cur_probe(struct usbh_video *video_class)
{
return usbh_video_get(video_class, VIDEO_REQUEST_GET_CUR, video_class->data_intf, 0x00, VIDEO_VS_PROBE_CONTROL, (uint8_t *)&video_class->probe, 26);
}
int usbh_videostreaming_set_cur_probe(struct usbh_video *video_class, uint8_t formatindex, uint8_t frameindex)
{
video_class->probe.bFormatIndex = formatindex;
video_class->probe.bFrameIndex = frameindex;
video_class->probe.dwMaxPayloadTransferSize = 0;
video_class->probe.dwFrameInterval = 333333;
return usbh_video_set(video_class, VIDEO_REQUEST_SET_CUR, video_class->data_intf, 0x00, VIDEO_VS_PROBE_CONTROL, (uint8_t *)&video_class->probe, 26);
}
int usbh_videostreaming_set_cur_commit(struct usbh_video *video_class, uint8_t formatindex, uint8_t frameindex)
{
memcpy(&video_class->commit, &video_class->probe, sizeof(struct video_probe_and_commit_controls));
video_class->commit.bFormatIndex = formatindex;
video_class->commit.bFrameIndex = frameindex;
video_class->commit.dwFrameInterval = 333333;
return usbh_video_set(video_class, VIDEO_REQUEST_SET_CUR, video_class->data_intf, 0x00, VIDEO_VS_COMMIT_CONTROL, (uint8_t *)&video_class->commit, 26);
}
int usbh_video_open(struct usbh_video *video_class,
uint8_t format_type,
uint16_t wWidth,
uint16_t wHeight,
uint8_t altsetting)
{
struct usb_setup_packet *setup;
struct usb_endpoint_descriptor *ep_desc;
uint8_t mult;
uint16_t mps;
int ret;
bool found = false;
uint8_t formatidx = 0;
uint8_t frameidx = 0;
uint8_t step;
if (!video_class || !video_class->hport) {
return -USB_ERR_INVAL;
}
setup = video_class->hport->setup;
if (video_class->is_opened) {
return 0;
}
for (uint8_t i = 0; i < video_class->num_of_formats; i++) {
if (format_type == video_class->format[i].format_type) {
formatidx = i + 1;
for (uint8_t j = 0; j < video_class->format[i].num_of_frames; j++) {
if ((wWidth == video_class->format[i].frame[j].wWidth) &&
(wHeight == video_class->format[i].frame[j].wHeight)) {
frameidx = j + 1;
found = true;
break;
}
}
}
}
if (found == false) {
return -USB_ERR_NODEV;
}
if (altsetting > (video_class->num_of_intf_altsettings - 1)) {
return -USB_ERR_INVAL;
}
/* Open video step:
* Get CUR request (probe)
* Set CUR request (probe)
* Get CUR request (probe)
* Get MAX request (probe)
* Get MIN request (probe)
* Get CUR request (probe)
* Set CUR request (commit)
*
*/
step = 0;
ret = usbh_videostreaming_get_cur_probe(video_class);
if (ret < 0) {
goto errout;
}
step = 1;
ret = usbh_videostreaming_set_cur_probe(video_class, formatidx, frameidx);
if (ret < 0) {
goto errout;
}
step = 2;
ret = usbh_videostreaming_get_cur_probe(video_class);
if (ret < 0) {
goto errout;
}
step = 3;
ret = usbh_video_get(video_class, VIDEO_REQUEST_GET_MAX, video_class->data_intf, 0x00, VIDEO_VS_PROBE_CONTROL, NULL, 26);
if (ret < 0) {
goto errout;
}
step = 4;
ret = usbh_video_get(video_class, VIDEO_REQUEST_GET_MIN, video_class->data_intf, 0x00, VIDEO_VS_PROBE_CONTROL, NULL, 26);
if (ret < 0) {
goto errout;
}
step = 5;
ret = usbh_videostreaming_set_cur_probe(video_class, formatidx, frameidx);
if (ret < 0) {
goto errout;
}
step = 6;
ret = usbh_videostreaming_get_cur_probe(video_class);
if (ret < 0) {
goto errout;
}
step = 7;
ret = usbh_videostreaming_set_cur_commit(video_class, formatidx, frameidx);
if (ret < 0) {
goto errout;
}
step = 8;
setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_STANDARD | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = USB_REQUEST_SET_INTERFACE;
setup->wValue = altsetting;
setup->wIndex = video_class->data_intf;
setup->wLength = 0;
ret = usbh_control_transfer(video_class->hport, setup, NULL);
if (ret < 0) {
goto errout;
}
ep_desc = &video_class->hport->config.intf[video_class->data_intf].altsetting[altsetting].ep[0].ep_desc;
mult = (ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_ADDITIONAL_TRANSCATION_MASK) >> USB_MAXPACKETSIZE_ADDITIONAL_TRANSCATION_SHIFT;
mps = ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_MASK;
if (ep_desc->bEndpointAddress & 0x80) {
video_class->isoin_mps = mps * (mult + 1);
USBH_EP_INIT(video_class->isoin, ep_desc);
} else {
video_class->isoout_mps = mps * (mult + 1);
USBH_EP_INIT(video_class->isoout, ep_desc);
}
USB_LOG_INFO("Open video and select formatidx:%u, frameidx:%u, altsetting:%u\r\n", formatidx, frameidx, altsetting);
video_class->is_opened = true;
video_class->current_format = format_type;
return ret;
errout:
USB_LOG_ERR("Fail to open video in step %u\r\n", step);
return ret;
}
int usbh_video_close(struct usbh_video *video_class)
{
struct usb_setup_packet *setup;
int ret = 0;
if (!video_class || !video_class->hport) {
return -USB_ERR_INVAL;
}
setup = video_class->hport->setup;
USB_LOG_INFO("Close video device\r\n");
video_class->is_opened = false;
if (video_class->isoin) {
video_class->isoin = NULL;
}
if (video_class->isoout) {
video_class->isoout = NULL;
}
setup->bmRequestType = USB_REQUEST_DIR_OUT | USB_REQUEST_STANDARD | USB_REQUEST_RECIPIENT_INTERFACE;
setup->bRequest = USB_REQUEST_SET_INTERFACE;
setup->wValue = 0;
setup->wIndex = video_class->data_intf;
setup->wLength = 0;
ret = usbh_control_transfer(video_class->hport, setup, NULL);
if (ret < 0) {
return ret;
}
return ret;
}
void usbh_video_list_info(struct usbh_video *video_class)
{
struct usb_endpoint_descriptor *ep_desc;
uint8_t mult;
uint16_t mps;
USB_LOG_INFO("============= Video device information ===================\r\n");
USB_LOG_RAW("bcdVDC:%04x\r\n", video_class->bcdVDC);
USB_LOG_RAW("Num of altsettings:%u\r\n", video_class->num_of_intf_altsettings);
for (uint8_t i = 0; i < video_class->num_of_intf_altsettings; i++) {
if (i == 0) {
USB_LOG_RAW("Ingore altsetting 0\r\n");
continue;
}
ep_desc = &video_class->hport->config.intf[video_class->data_intf].altsetting[i].ep[0].ep_desc;
mult = (ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_ADDITIONAL_TRANSCATION_MASK) >> USB_MAXPACKETSIZE_ADDITIONAL_TRANSCATION_SHIFT;
mps = ep_desc->wMaxPacketSize & USB_MAXPACKETSIZE_MASK;
USB_LOG_RAW("Altsetting:%u, Ep=%02x Attr=%02u Mps=%d Interval=%02u Mult=%02u\r\n",
i,
ep_desc->bEndpointAddress,
ep_desc->bmAttributes,
mps,
ep_desc->bInterval,
mult);
}
USB_LOG_RAW("bNumFormats:%u\r\n", video_class->num_of_formats);
for (uint8_t i = 0; i < video_class->num_of_formats; i++) {
USB_LOG_RAW(" FormatIndex:%u\r\n", i + 1);
USB_LOG_RAW(" FormatType:%s\r\n", format_type[video_class->format[i].format_type]);
USB_LOG_RAW(" bNumFrames:%u\r\n", video_class->format[i].num_of_frames);
USB_LOG_RAW(" Resolution:\r\n");
for (uint8_t j = 0; j < video_class->format[i].num_of_frames; j++) {
USB_LOG_RAW(" FrameIndex:%u\r\n", j + 1);
USB_LOG_RAW(" wWidth: %d, wHeight: %d\r\n",
video_class->format[i].frame[j].wWidth,
video_class->format[i].frame[j].wHeight);
}
}
USB_LOG_INFO("============= Video device information ===================\r\n");
}
static int usbh_video_ctrl_connect(struct usbh_hubport *hport, uint8_t intf)
{
int ret;
uint8_t cur_iface = 0xff;
// uint8_t cur_alt_setting = 0xff;
uint8_t frame_index = 0xff;
uint8_t format_index = 0xff;
uint8_t num_of_frames = 0xff;
uint8_t *p;
struct usbh_video *video_class = usbh_video_class_alloc();
if (video_class == NULL) {
USB_LOG_ERR("Fail to alloc video_class\r\n");
return -USB_ERR_NOMEM;
}
video_class->hport = hport;
video_class->ctrl_intf = intf;
video_class->data_intf = intf + 1;
video_class->num_of_intf_altsettings = hport->config.intf[intf + 1].altsetting_num;
hport->config.intf[intf].priv = video_class;
ret = usbh_video_close(video_class);
if (ret < 0) {
USB_LOG_ERR("Fail to close video device\r\n");
return ret;
}
p = hport->raw_config_desc;
while (p[DESC_bLength]) {
switch (p[DESC_bDescriptorType]) {
case USB_DESCRIPTOR_TYPE_INTERFACE:
cur_iface = p[INTF_DESC_bInterfaceNumber];
//cur_alt_setting = p[INTF_DESC_bAlternateSetting];
break;
case USB_DESCRIPTOR_TYPE_ENDPOINT:
//ep_desc = (struct usb_endpoint_descriptor *)p;
break;
case VIDEO_CS_INTERFACE_DESCRIPTOR_TYPE:
if (cur_iface == video_class->ctrl_intf) {
switch (p[DESC_bDescriptorSubType]) {
case VIDEO_VC_HEADER_DESCRIPTOR_SUBTYPE:
video_class->bcdVDC = ((uint16_t)p[4] << 8) | (uint16_t)p[3];
break;
case VIDEO_VC_INPUT_TERMINAL_DESCRIPTOR_SUBTYPE:
break;
case VIDEO_VC_OUTPUT_TERMINAL_DESCRIPTOR_SUBTYPE:
break;
case VIDEO_VC_PROCESSING_UNIT_DESCRIPTOR_SUBTYPE:
break;
default:
break;
}
} else if (cur_iface == video_class->data_intf) {
switch (p[DESC_bDescriptorSubType]) {
case VIDEO_VS_INPUT_HEADER_DESCRIPTOR_SUBTYPE:
video_class->num_of_formats = p[DESC_bNumFormats];
break;
case VIDEO_VS_FORMAT_UNCOMPRESSED_DESCRIPTOR_SUBTYPE:
format_index = p[DESC_bFormatIndex];
num_of_frames = p[DESC_bNumFrameDescriptors];
video_class->format[format_index - 1].num_of_frames = num_of_frames;
video_class->format[format_index - 1].format_type = USBH_VIDEO_FORMAT_UNCOMPRESSED;
break;
case VIDEO_VS_FORMAT_MJPEG_DESCRIPTOR_SUBTYPE:
format_index = p[DESC_bFormatIndex];
num_of_frames = p[DESC_bNumFrameDescriptors];
video_class->format[format_index - 1].num_of_frames = num_of_frames;
video_class->format[format_index - 1].format_type = USBH_VIDEO_FORMAT_MJPEG;
break;
case VIDEO_VS_FRAME_UNCOMPRESSED_DESCRIPTOR_SUBTYPE:
frame_index = p[DESC_bFrameIndex];
video_class->format[format_index - 1].frame[frame_index - 1].wWidth = ((struct video_cs_if_vs_frame_uncompressed_descriptor *)p)->wWidth;
video_class->format[format_index - 1].frame[frame_index - 1].wHeight = ((struct video_cs_if_vs_frame_uncompressed_descriptor *)p)->wHeight;
break;
case VIDEO_VS_FRAME_MJPEG_DESCRIPTOR_SUBTYPE:
frame_index = p[DESC_bFrameIndex];
video_class->format[format_index - 1].frame[frame_index - 1].wWidth = ((struct video_cs_if_vs_frame_mjpeg_descriptor *)p)->wWidth;
video_class->format[format_index - 1].frame[frame_index - 1].wHeight = ((struct video_cs_if_vs_frame_mjpeg_descriptor *)p)->wHeight;
break;
default:
break;
}
}
break;
default:
break;
}
/* skip to next descriptor */
p += p[DESC_bLength];
}
usbh_video_list_info(video_class);
snprintf(hport->config.intf[intf].devname, CONFIG_USBHOST_DEV_NAMELEN, DEV_FORMAT, video_class->minor);
USB_LOG_INFO("Register Video Class:%s\r\n", hport->config.intf[intf].devname);
usbh_video_run(video_class);
return ret;
}
static int usbh_video_ctrl_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
int ret = 0;
struct usbh_video *video_class = (struct usbh_video *)hport->config.intf[intf].priv;
if (video_class) {
if (video_class->isoin) {
}
if (video_class->isoout) {
}
if (hport->config.intf[intf].devname[0] != '\0') {
USB_LOG_INFO("Unregister Video Class:%s\r\n", hport->config.intf[intf].devname);
usbh_video_stop(video_class);
}
usbh_video_class_free(video_class);
}
return ret;
}
static int usbh_video_streaming_connect(struct usbh_hubport *hport, uint8_t intf)
{
(void)hport;
(void)intf;
return 0;
}
static int usbh_video_streaming_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
(void)hport;
(void)intf;
return 0;
}
__WEAK void usbh_video_run(struct usbh_video *video_class)
{
(void)video_class;
}
__WEAK void usbh_video_stop(struct usbh_video *video_class)
{
(void)video_class;
}
const struct usbh_class_driver video_ctrl_class_driver = {
.driver_name = "video_ctrl",
.connect = usbh_video_ctrl_connect,
.disconnect = usbh_video_ctrl_disconnect
};
const struct usbh_class_driver video_streaming_class_driver = {
.driver_name = "video_streaming",
.connect = usbh_video_streaming_connect,
.disconnect = usbh_video_streaming_disconnect
};
CLASS_INFO_DEFINE const struct usbh_class_info video_ctrl_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.class = USB_DEVICE_CLASS_VIDEO,
.subclass = VIDEO_SC_VIDEOCONTROL,
.protocol = VIDEO_PC_PROTOCOL_UNDEFINED,
.id_table = NULL,
.class_driver = &video_ctrl_class_driver
};
CLASS_INFO_DEFINE const struct usbh_class_info video_streaming_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.class = USB_DEVICE_CLASS_VIDEO,
.subclass = VIDEO_SC_VIDEOSTREAMING,
.protocol = VIDEO_PC_PROTOCOL_UNDEFINED,
.id_table = NULL,
.class_driver = &video_streaming_class_driver
};
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