OTG与gadget学习（四）
现在可以识别出来了，太高兴了。离成功又近了一步。
EP0_BUFSIZE 这个和struct usb_descriptor_header *hw_function[] 比较关键，EP0_BUFSIZE定义了ep0端点的Buf的大小，要能存放下最大的返回数据，通过之前bus hound查看与分析，真实摄像头返回最大是933字节，返回的内容包含了hw_function。但是目前，若hw_function包含的太多，就会一直“on state DATA_STATE_XMIT”，导致后面枚举无法进行下去，一直reset，最后变成unknown device。先减少内容，以后再想想该怎么做。
先把目前的代码放这。
mygadget.c:
<pre name="code" class="cpp">#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/video.h>
#include <linux/usb/composite.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/types.h>
#include <asm/uaccess.h>
#include "composite.c"
#include "usbstring.c"
#include "config.c"
#include "epautoconf.c"
/* real usb cam */
int use_hw;
struct vc_intf_header_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__le16 bcdUVC;
__le16 wTotalLength;
__le32 dwClockFrequency;
__u8 bInCollection;
__u8 baInterfaceNr;
} __attribute__ ((packed));
struct vc_intf_it_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__u8 bTerminalID;
__le16 wTerminalType;
__u8 bAssocTerminal;
__u8 iTerminal;
__le16 wObjectiveFocalLengthMin;
__le16 wObjectiveFocalLengthMax;
__le16 wOcularFocalLength;
__u8 bControlSize;
__le32 bmControls:24;
}__attribute__ ((packed));
struct vc_intf_eu_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__u8 bUnitID;
__u8 guidExtensionCode[16];
__u8 bNumControls;
__u8 bNrPins;
__u8 baSourceID;
__u8 bControlSize;
__u8 bmControls;
__u8 iExtension;
}__attribute__ ((packed));
struct vc_intf_pu_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__u8 bUnitID;
__u8 baSourceID;
__le16 wMaxMultiplier;
__u8 bControlSize;
__le16 bmControls;
__u8 iProcessing;
}__attribute__ ((packed));
struct vc_intf_ot_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__u8 bTerminalID;
__le16 wTerminalType;
__u8 bAssocTerminal;
__u8 bSourceID;
__u8 iTerminal;
}__attribute__ ((packed));
struct vc_interface {
struct vc_intf_header_desc header_desc; //13byte
struct vc_intf_it_desc it_desc; //18byte
struct vc_intf_eu_desc eu_desc; //26byte
struct vc_intf_pu_desc pu_desc; //11byte
struct vc_intf_ot_desc ot_desc; //9byte
}__attribute__ ((packed));
struct usb_ep_extra {
__u8 data[5];
}__attribute__ ((packed));
struct hardware_device_vc_interface {
struct usb_interface_descriptor desc;
struct vc_interface vc_intf;
struct usb_endpoint_descriptor ep_desc;
struct usb_ep_extra ep_extra;
};
struct vs_intf_header_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubType;
__u8 bNumFormats;
__le16 wTotalLength;
__u8 bEndPointAddress;
__u8 bmInfo;
__u8 bTerminalLink;
__u8 bStillCaptureMethod;
__u8 bTriggerSupport;
__u8 bTriggerUsage;
__u8 bControlSize;
__u8 bmaControls[2];
}__attribute__ ((packed));
struct vs_intf_format_mjpeg_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFormatIndex;
__u8 bNumFrameDescriptors;
__u8 bFlags;
__u8 bDefaultFrameIndex;
__u8 bAspectRatioX;
__u8 bAspectRatioY;
__le16 bmInterlaceFlags;
}__attribute__ ((packed));
struct vs_intf_frame_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFrameIndex;
__u8 bmCapabilities;
__le16 wWidth;
__le16 wHeight;
__le32 dwMinBitRate;
__le32 dwMaxBitRate;
__le32 dwMaxVideoFrameBufferSize;
__le32 dwDefaultFrameInterval;
__u8 bFrameIntervalType;
__le32 dwFrameInterval;
}__attribute__ ((packed));
struct ImageSizePattern {
__le16 wWidth;
__le16 wHeight;
}__attribute__ ((packed));
struct vs_intf_still_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bEndpointAddress;
__u8 bNumImageSizePatterns;
/* bNumImageSizePatterns=8 */
struct ImageSizePattern bImageSize[8];
__u8 bNumCompressionPatterns;
}__attribute__ ((packed));
struct vs_intf_colorFormat_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bColorPrimaries;
__u8 bTransferCharacteristics;
__u8 bMatrixCoefficients;
}__attribute__ ((packed));
struct vs_intf_format_uncmps_desc {
__u8 bLength;
__u8 bDescriptorType;
__u8 bDescriptorSubtype;
__u8 bFormatIndex;
__u8 bNumFrameDescriptors;
__u8 guidFormat[16];
__u8 bBitsPerPixel;
__u8 bDefaultFrameIndex;
__u8 bAspectRatioX;
__u8 bAspectRatioY;
__le16 bmInterlaceFlags;
}__attribute__ ((packed));
struct vs_interface {
struct vs_intf_header_desc header_desc; //15byte
struct vs_intf_format_mjpeg_desc mjpg_fmt_desc; //11byte
/* fmt_mjpg_desc.bNumFrameDescriptors=9 */
struct vs_intf_frame_desc mjpg_frame_desc[9]; //30byte
struct vs_intf_still_desc mjpg_still_desc;
struct vs_intf_colorFormat_desc mjpg_clrFmt_desc;
struct vs_intf_format_uncmps_desc uncmps_fmt_desc;
/* fmt_uncmps_desc.bNumFrameDescriptors=9 */
struct vs_intf_frame_desc uncmps_frame_desc[9];
struct vs_intf_still_desc uncmps_still_desc;
struct vs_intf_colorFormat_desc uncmps_clrFmt_desc;
}__attribute__ ((packed));
struct vs_interface_altsetting {
struct usb_interface_descriptor desc;
struct usb_endpoint_descriptor ep_desc;
};
struct hardware_device_vs_interface {
struct usb_interface_descriptor desc;
struct vs_interface vs_intf;
struct vs_interface_altsetting altsetting[8];
};
struct hardware_device_config {
struct usb_config_descriptor desc;
struct usb_interface_assoc_descriptor intf_assoc_desc;
struct hardware_device_vc_interface vc_interf;
struct hardware_device_vs_interface vs_interf;
};
struct hardware_device {
struct usb_device_descriptor desc;
struct usb_host_endpoint ep0;
struct hardware_device_config config;
};
struct hardware_device hw_dev;
struct usb_string hw_strings[5];
/* ---------- */
#define DEBUG
#undef DBG
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...) do { } while (0)
#endif
static const char mygadget_string_product[] = "My Gadget";
/*
ep0's buffer's size,
DT_CONFIG, need transfer 933bytes
so it must be setted more than 933
but how much to set
*/
#define EP0_BUFSIZE 950
#define DELAYED_STATUS (EP0_BUFSIZE + 299) /* An impossibly large value */
/* Bulk-only class specific requests */
#define USB_BULK_RESET_REQUEST 0xff
#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
/* atomic_bitflags */
#define REGISTERED 0
#define IGNORE_BULK_OUT 1
#define SUSPENDED 2
typedef enum {
/* This one isn't used anywhere */
MYGADGET_STATE_COMMAND_PHASE = -10,
MYGADGET_STATE_DATA_PHASE,
MYGADGET_STATE_STATUS_PHASE,
MYGADGET_STATE_IDLE = 0,
MYGADGET_STATE_ABORT_BULK_OUT,
MYGADGET_STATE_RESET,
MYGADGET_STATE_INTERFACE_CHANGE,
MYGADGET_STATE_CONFIG_CHANGE,
MYGADGET_STATE_DISCONNECT,
MYGADGET_STATE_EXIT,
MYGADGET_STATE_TERMINATED
} MYGADGET_STATE;
struct mygadget_dev {
struct usb_gadget *gadget;
struct usb_request *ep0req; // For control responses
unsigned int ep0_req_tag;
const char *ep0req_name;
spinlock_t lock;
struct task_struct *thread_task;
struct completion thread_notifier;
unsigned int exception_req_tag;
MYGADGET_STATE state;
unsigned long atomic_bitflags;
unsigned char config, new_config;
struct usb_request *request;
struct usb_ep *bulk_in;
struct usb_ep *bulk_out;
unsigned int running : 1;
unsigned int bulk_in_enabled : 1;
unsigned int bulk_out_enabled : 1;
unsigned int intr_in_enabled : 1;
unsigned int phase_error : 1;
unsigned int short_packet_received : 1;
unsigned int bad_lun_okay : 1;
};
static struct mygadget_dev *gMygadget;
static struct usb_endpoint_descriptor mygadget_fs_bulk_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
/* wMaxPacketSize set by autoconfiguration */
};
static struct usb_endpoint_descriptor mygadget_hs_bulk_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 512,
};
static struct usb_otg_descriptor mygadget_otg_desc = {
.bLength = sizeof mygadget_otg_desc,
.bDescriptorType = USB_DT_OTG,
.bmAttributes = USB_OTG_SRP,
};
static struct usb_descriptor_header *hw_function[] = {
(struct usb_descriptor_header *) &mygadget_otg_desc,
(struct usb_descriptor_header *) &hw_dev.config.intf_assoc_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.vc_intf.header_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.vc_intf.it_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.vc_intf.eu_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.vc_intf.pu_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.vc_intf.ot_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vc_interf.ep_extra,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.header_desc,
#if 0
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_fmt_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[0],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[1],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[2],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[3],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[4],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[5],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[6],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[7],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_frame_desc[8],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_still_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.mjpg_clrFmt_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_fmt_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[0],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[1],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[2],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[3],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[4],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[5],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[6],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[7],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_frame_desc[8],
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_still_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.vs_intf.uncmps_clrFmt_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[0].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[0].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[1].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[1].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[2].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[2].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[3].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[3].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[4].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[4].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[5].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[5].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[6].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[6].ep_desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[7].desc,
(struct usb_descriptor_header *) &hw_dev.config.vs_interf.altsetting[7].ep_desc,
#endif
NULL,
};
static struct usb_qualifier_descriptor mygadget_dev_qualifier = {
.bLength = sizeof(mygadget_dev_qualifier),
.bDescriptorType = USB_DT_DEVICE_QUALIFIER,
.bcdUSB = cpu_to_le16(0x0200),
.bDeviceClass = USB_CLASS_MISC,
.bNumConfigurations = 1,
};
static void mygadget_raise_exception(struct mygadget_dev *mydev, MYGADGET_STATE state)
{
unsigned long flags;
/* Do nothing if a higher-priority exception is already in progress.
* If a lower-or-equal priority exception is in progress, preempt it
* and notify the main thread by sending it a signal. */
spin_lock_irqsave(&mydev->lock, flags);
if (mydev->state <= state) {
mydev->exception_req_tag = mydev->ep0_req_tag;
mydev->state = state;
if (mydev->thread_task)
send_sig_info(SIGUSR1, SEND_SIG_FORCED,
mydev->thread_task);
}
spin_unlock_irqrestore(&mydev->lock, flags);
}
static void __exit mygadget_unbind(struct usb_gadget *gadget)
{
struct mygadget_dev *mydev = get_gadget_data(gadget);
struct usb_request *req = mydev->ep0req;
printk("%s\n", __func__);
clear_bit(REGISTERED, &mydev->atomic_bitflags);
/* If the thread isn't already dead, tell it to exit now */
if (mydev->state != MYGADGET_STATE_TERMINATED) {
mygadget_raise_exception(mydev, MYGADGET_STATE_EXIT);
wait_for_completion(&mydev->thread_notifier);
/* The cleanup routine waits for this completion also */
complete(&mydev->thread_notifier);
}
/* Free the request and buffer for endpoint 0 */
if(req) {
kfree(req->buf);
usb_ep_free_request(gadget->ep0, req);
}
}
static void mygadget_disconnect(struct usb_gadget *gadget)
{
struct mygadget_dev *mydev = get_gadget_data(gadget);
DBG("%s: disconnect or port reset\n", __func__);
mygadget_raise_exception(mydev, MYGADGET_STATE_DISCONNECT);
}
static int mygadget_class_setup_req(struct mygadget_dev *dev,
const struct usb_ctrlrequest *ctrl)
{
int value = -EOPNOTSUPP;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
if (!dev->config)
return value;
/* Handle Bulk-only class-specific requests */
switch (ctrl->bRequest) {
case USB_BULK_RESET_REQUEST:
DBG("%s: USB_BULK_RESET_REQUEST\n", __func__);
if (ctrl->bRequestType != (USB_DIR_OUT |
USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
if (w_index != 0 || w_value != 0) {
value = -EDOM;
break;
}
/* Raise an exception to stop the current operation
* and reinitialize our state. */
DBG("%s: bulk reset request\n", __func__);
mygadget_raise_exception(dev, MYGADGET_STATE_RESET);
value = DELAYED_STATUS;
break;
case USB_BULK_GET_MAX_LUN_REQUEST:
DBG("%s: USB_BULK_GET_MAX_LUN_REQUEST\n", __func__);
if (ctrl->bRequestType != (USB_DIR_IN |
USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
if (w_index != 0 || w_value != 0) {
value = -EDOM;
break;
}
VDBG(dev, "get max LUN\n");
value = 1;
break;
}
if (value == -EOPNOTSUPP)
VDBG(dev,
"unknown class-specific control req "
"%02x.%02x v%04x i%04x l%u\n",
ctrl->bRequestType, ctrl->bRequest,
le16_to_cpu(ctrl->wValue), w_index, w_length);
return value;
}
static struct usb_gadget_strings mygadget_stringtab = {
.language = 0x0409, /* en-us */
.strings = hw_strings,
};
/*
* Config descriptors must agree with the code that sets configurations
* and with code managing interfaces and their altsettings. They must
* also handle different speeds and other-speed requests.
*/
static int mygadget_pop_config_buf(struct usb_gadget *gadget,
u8 *buf, u8 type, unsigned index)
{
enum usb_device_speed speed = gadget->speed;
int len;
const struct usb_descriptor_header **function;
if (index > 0)
return -EINVAL;
if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG)
speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed;
if(use_hw) {
DBG("%s: use hw func\n", __func__);
/*
function = gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH
? (const struct usb_descriptor_header **)hw_hs_function
: (const struct usb_descriptor_header **)hw_fs_function;
*/
function = (const struct usb_descriptor_header **)hw_function;
} else {
DBG("%s: use mygadget func\n", __func__);
}
/* for now, don't add otg func */
if (!gadget_is_otg(gadget))
function++;
if(use_hw) {
DBG("%s: use hw config\n", __func__);
if(*function)
DBG("%s: (*function)->bLength=%u\n", __func__, (*function)->bLength);
else
DBG("%s: *function is null\n", __func__);
len = usb_gadget_config_buf(&hw_dev.config.desc, buf, EP0_BUFSIZE, function);
} else {
DBG("%s: use mygadget config\n", __func__);
}
((struct usb_config_descriptor *) buf)->bDescriptorType = type;
return len;
}
/* Ep0 standard request handlers. These always run in_irq. */
static int mygadget_standard_setup_req(struct mygadget_dev *dev,
const struct usb_ctrlrequest *ctrl)
{
struct usb_request *req = dev->ep0req;
int value = -EOPNOTSUPP;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
/* Usually this just stores reply data in the pre-allocated ep0 buffer,
* but config change events will also reconfigure hardware. */
switch (ctrl->bRequest) {
case USB_REQ_GET_DESCRIPTOR:
DBG("//%s\\\\: USB_REQ_GET_DESCRIPTOR\n", __func__);
if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
USB_RECIP_DEVICE))
break;
switch (w_value >> 8) {
case USB_DT_DEVICE:
DBG("//%s\\\\: USB_DT_DEVICE\n", __func__);
VDBG(dev, "get device descriptor\n");
if(use_hw) {
DBG("//%s\\\\: use hw_dev\n", __func__);
value = sizeof(hw_dev.desc);
memcpy(req->buf, &hw_dev.desc, value);
} else {
DBG("//%s\\\\: use mygadget\n", __func__);
}
break;
case USB_DT_DEVICE_QUALIFIER:
DBG("//%s\\\\: USB_DT_DEVICE_QUALIFIER\n", __func__);
VDBG(dev, "get device qualifier\n");
if (!gadget_is_dualspeed(dev->gadget))
break;
value = sizeof(mygadget_dev_qualifier);
memcpy(req->buf, &mygadget_dev_qualifier, value);
break;
case USB_DT_OTHER_SPEED_CONFIG:
DBG("//%s\\\\: USB_DT_OTHER_SPEED_CONFIG\n", __func__);
VDBG(dev, "get other-speed config descriptor\n");
if (!gadget_is_dualspeed(dev->gadget))
break;
goto get_config;
case USB_DT_CONFIG:
DBG("//%s\\\\: USB_DT_CONFIG\n", __func__);
VDBG(dev, "get configuration descriptor\n");
get_config:
value = mygadget_pop_config_buf(dev->gadget,
req->buf,
w_value >> 8,
w_value & 0xff);
break;
case USB_DT_STRING:
DBG("//%s\\\\: USB_DT_STRING\n", __func__);
VDBG(dev, "get string descriptor\n");
/* wIndex == language code */
value = usb_gadget_get_string(&mygadget_stringtab,
w_value & 0xff, req->buf);
break;
}
break;
/* One config, two speeds */
case USB_REQ_SET_CONFIGURATION:
DBG("//%s\\\\: USB_REQ_SET_CONFIGURATION\n", __func__);
if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
USB_RECIP_DEVICE))
break;
VDBG(dev, "set configuration\n");
if (w_value == 1 || w_value == 0) {
dev->new_config = w_value;
/* Raise an exception to wipe out previous transaction
* state (queued bufs, etc) and set the new config. */
mygadget_raise_exception(dev, MYGADGET_STATE_CONFIG_CHANGE);
value = DELAYED_STATUS;
}
break;
case USB_REQ_GET_CONFIGURATION:
DBG("//%s\\\\: USB_REQ_GET_CONFIGURATION\n", __func__);
if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
USB_RECIP_DEVICE))
break;
VDBG(dev, "get configuration\n");
*(u8 *) req->buf = dev->config;
value = 1;
break;
case USB_REQ_SET_INTERFACE:
DBG("//%s\\\\: USB_REQ_SET_INTERFACE\n", __func__);
if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD |
USB_RECIP_INTERFACE))
break;
if (dev->config && w_index == 0) {
/* Raise an exception to wipe out previous transaction
* state (queued bufs, etc) and install the new
* interface altsetting. */
mygadget_raise_exception(dev, MYGADGET_STATE_INTERFACE_CHANGE);
value = DELAYED_STATUS;
}
break;
case USB_REQ_GET_INTERFACE:
DBG("//%s\\\\: USB_REQ_GET_INTERFACE\n", __func__);
if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
USB_RECIP_INTERFACE))
break;
if (!dev->config)
break;
if (w_index != 0) {
value = -EDOM;
break;
}
VDBG(dev, "get interface\n");
*(u8 *) req->buf = 0;
value = 1;
break;
default:
DBG("//%s\\\\: default\n", __func__);
VDBG(dev,
"unknown control req %02x.%02x v%04x i%04x l%u\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, le16_to_cpu(ctrl->wLength));
}
return value;
}
static int mygadget_ep0_queue(struct mygadget_dev *dev)
{
int rc;
rc = usb_ep_queue(dev->gadget->ep0, dev->ep0req, GFP_ATOMIC);
if (rc != 0 && rc != -ESHUTDOWN) {
/* We can't do much more than wait for a reset */
WARNING(dev, "error in submission: %s --> %d\n",
dev->gadget->ep0->name, rc);
}
return rc;
}
static int mygadget_setup(struct usb_gadget *gadget,
const struct usb_ctrlrequest *ctrl)
{
struct mygadget_dev *mydev = get_gadget_data(gadget);
int ret = 0;
int w_length = le16_to_cpu(ctrl->wLength);
printk("%s: ctrl->wLength=%d\n", __func__, w_length);
++mydev->ep0_req_tag; // Record arrival of a new request
mydev->ep0req->context = NULL;
mydev->ep0req->length = 0;
if(sizeof(*ctrl) < 512) {
DBG("%s: ep0-setup, length %u:\n", __func__, sizeof(*ctrl));
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
16, 1, (u8*)ctrl, sizeof(*ctrl), 0);
}
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
ret = mygadget_class_setup_req(mydev, ctrl);
else
ret = mygadget_standard_setup_req(mydev, ctrl);
/* Respond with data/status or defer until later? */
if (ret >= 0 && ret != DELAYED_STATUS) {
ret = min(ret, w_length);
mydev->ep0req->length = ret;
mydev->ep0req->zero = ret < w_length;
mydev->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
"ep0-in" : "ep0-out");
ret = mygadget_ep0_queue(mydev);
}
return ret;
}
static void mygadget_suspend(struct usb_gadget *gadget)
{
struct mygadget_dev *mydev = get_gadget_data(gadget);
printk("%s\n", __func__);
set_bit(SUSPENDED, &mydev->atomic_bitflags);
}
static void mygadget_resume(struct usb_gadget *gadget)
{
struct mygadget_dev *mydev = get_gadget_data(gadget);
printk("%s\n", __func__);
set_bit(SUSPENDED, &mydev->atomic_bitflags);
}
static struct usb_gadget_driver mygadget_driver = {
#ifdef CONFIG_USB_GADGET_DUALSPEED
.speed = USB_SPEED_HIGH,
#else
.speed = USB_SPEED_FULL,
#endif
.function = (char *) mygadget_string_product,
.unbind = mygadget_unbind,
.disconnect = mygadget_disconnect,
.setup = mygadget_setup,
.suspend = mygadget_suspend,
.resume = mygadget_resume,
.driver = {
.name = "MyGadget",
.owner = THIS_MODULE,
// .release = ...
// .suspend = ...
// .resume = ...
},
};
typedef void (*mygadget_routine_t)(struct mygadget_dev *);
static void mygadget_ep0_complete(struct usb_ep *ep, struct usb_request *req)
{
struct mygadget_dev *mydev = ep->driver_data;
DBG("%s\n", __func__);
if(req->actual > 0 && req->actual < EP0_BUFSIZE) {
DBG("actual: %u, len: %u\n", req->actual, req->length);
print_hex_dump(KERN_NOTICE, "", DUMP_PREFIX_OFFSET,
16, 1, req->buf, req->actual, 0);
}
if(req->status || req->actual != req->length)
DBG("%s --> %d, %u/%u\n", __func__, req->status, req->actual, req->length);
if(req->status == -ECONNRESET) // Request was cancelled
usb_ep_fifo_flush(ep);
/* call the func that req->context point */
if(req->status == 0 && req->context)
((mygadget_routine_t) (req->context))(mydev);
}
/* Maxpacket and other transfer characteristics vary by speed. */
static struct usb_endpoint_descriptor *
mygadget_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
struct usb_endpoint_descriptor *hs)
{
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
return hs;
return fs;
}
static int mygadget_enable_endpoint(struct mygadget_dev *mydev,
struct usb_ep *ep, const struct usb_endpoint_descriptor *d)
{
int rc;
ep->driver_data = mydev;
rc = usb_ep_enable(ep, d);
if(rc) {
DBG("%s: can't enable %s, result %d\n", __func__, ep->name, rc);
}
return rc;
}
/*
* Reset interface setting and re-init endpoint state (toggle etc).
* Call with altsetting < 0 to disable the interface. The only other
* available altsetting is 0, which enables the interface.
*/
static int mygadget_do_set_interface(struct mygadget_dev *mydev, int altsetting)
{
int rc = 0;
//int i;
const struct usb_endpoint_descriptor *d;
if (mydev->running)
DBG("%s: reset interface\n", __func__);
reset:
/* Deallocate the requests */
/*
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
struct fsg_buffhd *bh = &mydev->buffhds[i];
if (bh->inreq) {
usb_ep_free_request(mydev->bulk_in, bh->inreq);
bh->inreq = NULL;
}
if (bh->outreq) {
usb_ep_free_request(mydev->bulk_out, bh->outreq);
bh->outreq = NULL;
}
}
*/
/* Disable the endpoints */
if (mydev->bulk_in_enabled) {
usb_ep_disable(mydev->bulk_in);
mydev->bulk_in_enabled = 0;
}
if (mydev->bulk_out_enabled) {
usb_ep_disable(mydev->bulk_out);
mydev->bulk_out_enabled = 0;
}
mydev->running = 0;
if (altsetting < 0 || rc != 0)
return rc;
DBG("set interface %d\n", altsetting);
/* Enable the endpoints */
d = mygadget_ep_desc(mydev->gadget,
&hw_dev.config.vc_interf.ep_desc, &hw_dev.config.vc_interf.ep_desc);
if ((rc = mygadget_enable_endpoint(mydev, mydev->bulk_in, d)) != 0)
goto reset;
mydev->bulk_in_enabled = 1;
d = mygadget_ep_desc(mydev->gadget,
&mygadget_fs_bulk_out_desc, &mygadget_hs_bulk_out_desc);
if ((rc = mygadget_enable_endpoint(mydev, mydev->bulk_out, d)) != 0)
goto reset;
mydev->bulk_out_enabled = 1;
//mydev->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
clear_bit(IGNORE_BULK_OUT, &mydev->atomic_bitflags);
/* Allocate the requests */
/*
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
struct fsg_buffhd *bh = &mydev->buffhds[i];
if ((rc = alloc_request(mydev, mydev->bulk_in, &bh->inreq)) != 0)
goto reset;
if ((rc = alloc_request(mydev, mydev->bulk_out, &bh->outreq)) != 0)
goto reset;
bh->inreq->buf = bh->outreq->buf = bh->buf;
bh->inreq->context = bh->outreq->context = bh;
bh->inreq->complete = bulk_in_complete;
bh->outreq->complete = bulk_out_complete;
}
*/
mydev->running = 1;
return rc;
}
/*
* Change our operational configuration. This code must agree with the code
* that returns config descriptors, and with interface altsetting code.
*
* It's also responsible for power management interactions. Some
* configurations might not work with our current power sources.
* For now we just assume the gadget is always self-powered.
*/
static int mygadget_do_set_config(struct mygadget_dev *mydev, unsigned char config)
{
int rc = 0;
/* Disable the single interface */
if(mydev->config != 0) {
DBG("%s: reset config\n", __func__);
mydev->config = 0;
rc = mygadget_do_set_interface(mydev, -1);
}
/* Enable the interface */
if(config != 0) {
mydev->config = config;
if ((rc = mygadget_do_set_interface(mydev, 0)) != 0)
mydev->config = 0; // Reset on errors
else {
char *speed;
switch (mydev->gadget->speed) {
case USB_SPEED_LOW: speed = "low"; break;
case USB_SPEED_FULL: speed = "full"; break;
case USB_SPEED_HIGH: speed = "high"; break;
default: speed = "?"; break;
}
DBG("%s: %s speed config #%d\n", __func__, speed, mydev->config);
}
}
return rc;
}
static int mygadget_set_halt(struct mygadget_dev *dev, struct usb_ep *ep)
{
const char *name;
if (ep == dev->bulk_in)
name = "bulk-in";
else if (ep == dev->bulk_out)
name = "bulk-out";
else
name = ep->name;
DBG("[%s]: %s set halt\n", __func__, name);
return usb_ep_set_halt(ep);
}
static void mygadget_handle_exception(struct mygadget_dev *dev)
{
int sig;
siginfo_t info;
MYGADGET_STATE old_state;
unsigned int exception_req_tag;
unsigned char new_config;
int rc = 0;
/* Clear the existing signals. Anything but SIGUSR1 is converted
* into a high-priority EXIT exception. */
while(1) {
sig = dequeue_signal_lock(current, ¤t->blocked, &info);
if(!sig)
break;
if(sig != SIGUSR1) {
if(dev->state < MYGADGET_STATE_EXIT)
DBG("Main thread exiting on signal\n");
mygadget_raise_exception(dev, MYGADGET_STATE_EXIT);
}
}
/* Cancel all the pending transfers */
/*
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
bh = &dev->buffhds[i];
if (bh->inreq_busy)
usb_ep_dequeue(dev->bulk_in, bh->inreq);
if (bh->outreq_busy)
usb_ep_dequeue(dev->bulk_out, bh->outreq);
}
*/
/* Wait until everything is idle */
/*
while(1) {
num_active = dev->intreq_busy;
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
bh = &dev->buffhds[i];
num_active += bh->inreq_busy + bh->outreq_busy;
}
if (num_active == 0)
break;
if (sleep_thread(dev))
return;
}
*/
/* Clear out the controller's fifos */
if (dev->bulk_in_enabled)
usb_ep_fifo_flush(dev->bulk_in);
if (dev->bulk_out_enabled)
usb_ep_fifo_flush(dev->bulk_out);
/* Reset the I/O buffer states and pointers, the SCSI
* state, and the exception. Then invoke the handler. */
spin_lock_irq(&dev->lock);
/*
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
bh = &dev->buffhds[i];
bh->state = BUF_STATE_EMPTY;
}
fsg->next_buffhd_to_fill = dev->next_buffhd_to_drain =
&dev->buffhds[0];
*/
exception_req_tag = dev->exception_req_tag;
new_config = dev->new_config;
old_state = dev->state;
if (old_state == MYGADGET_STATE_ABORT_BULK_OUT)
dev->state = MYGADGET_STATE_STATUS_PHASE;
else {
dev->state = MYGADGET_STATE_IDLE;
}
spin_unlock_irq(&dev->lock);
/* Carry out any extra actions required for the exception */
switch (old_state) {
case MYGADGET_STATE_ABORT_BULK_OUT:
DBG("+++%s+++: ABORT_BULK_OUT\n", __func__);
//send_status(dev);
spin_lock_irq(&dev->lock);
if (dev->state == MYGADGET_STATE_STATUS_PHASE)
dev->state = MYGADGET_STATE_IDLE;
spin_unlock_irq(&dev->lock);
break;
case MYGADGET_STATE_RESET:
DBG("+++%s+++: RESET\n", __func__);
/* In case we were forced against our will to halt a
* bulk endpoint, clear the halt now. (The SuperH UDC
* requires this.) */
if (test_and_clear_bit(IGNORE_BULK_OUT, &dev->atomic_bitflags))
usb_ep_clear_halt(dev->bulk_in);
if (dev->ep0_req_tag == exception_req_tag)
mygadget_ep0_queue(dev); // Complete the status stage
break;
case MYGADGET_STATE_INTERFACE_CHANGE:
DBG("+++%s+++: INTERFACE_CHANGE\n", __func__);
/*
rc = do_set_interface(dev, 0);
if (dev->ep0_req_tag != exception_req_tag)
break;
if (rc != 0) // STALL on errors
fsg_set_halt(dev, dev->ep0);
else // Complete the status stage
ep0_queue(dev);
*/
break;
case MYGADGET_STATE_CONFIG_CHANGE:
DBG("+++%s+++: CONFIG_CHANGE\n", __func__);
rc = mygadget_do_set_config(dev, new_config);
if (dev->ep0_req_tag != exception_req_tag)
break;
if (rc != 0) // STALL on errors
mygadget_set_halt(dev, dev->gadget->ep0);
else // Complete the status stage
mygadget_ep0_queue(dev);
break;
case MYGADGET_STATE_DISCONNECT:
mygadget_do_set_config(dev, 0); // Unconfigured state
break;
case MYGADGET_STATE_EXIT:
case MYGADGET_STATE_TERMINATED:
DBG("+++%s+++: EXIT / TERMINATED\n", __func__);
mygadget_do_set_config(dev, 0); // Free resources
spin_lock_irq(&dev->lock);
dev->state = MYGADGET_STATE_TERMINATED; // Stop the thread
spin_unlock_irq(&dev->lock);
break;
default:
break;
}
}
static int mygadget_sleep_thread(struct mygadget_dev *mydev)
{
int rc = 0;
/* Wait until a signal arrives or we are woken up */
while(1) {
try_to_freeze();
set_current_state(TASK_INTERRUPTIBLE);
if (signal_pending(current)) {
rc = -EINTR;
break;
}
if (mydev->running)
break;
schedule();
}
__set_current_state(TASK_RUNNING);
mydev->running = 0;
return rc;
}
static int mygadget_thread(void *arg)
{
struct mygadget_dev *mydev = (struct mygadget_dev *)arg;
printk("%s\n", __func__);
allow_signal(SIGINT);
allow_signal(SIGTERM);
allow_signal(SIGKILL);
allow_signal(SIGUSR1);
/* Allow the thread to be frozen */
set_freezable();
/* Arrange for userspace references to be interpreted as kernel
* pointers. That way we can pass a kernel pointer to a routine
* that expects a __user pointer and it will work okay. */
set_fs(get_ds());
/* The main loop */
while (mydev->state != MYGADGET_STATE_TERMINATED) {
if(mydev->state > MYGADGET_STATE_IDLE || signal_pending(current)){
DBG("%s handle exception\n", __func__);
mygadget_handle_exception(mydev);
continue;
}
DBG("%s running\n", __func__);
if (!mydev->running) {
mygadget_sleep_thread(mydev);
continue;
}
//if(mygadget_get_next_command(mydev))
// continue;
spin_lock_irq(&mydev->lock);
if(mydev->state <= MYGADGET_STATE_IDLE)
mydev->state = MYGADGET_STATE_IDLE;
spin_unlock_irq(&mydev->lock);
}
spin_lock_irq(&mydev->lock);
mydev->thread_task = NULL;
spin_unlock_irq(&mydev->lock);
/* Unregister the driver iff the thread hasn't already done so */
if (test_and_clear_bit(REGISTERED, &gMygadget->atomic_bitflags))
usb_gadget_unregister_driver(&mygadget_driver);
/* Let the unbind and cleanup routines know the thread has exited */
complete_and_exit(&mydev->thread_notifier, 0);
}
/* Bind函数是功能层需要实现与设备层关联的重要函数 */
static int __init mygadget_bind(struct usb_gadget *gadget)
{
int ret = 0;
struct mygadget_dev *mydev = gMygadget;
struct usb_ep *ep = NULL;
//int gcnum;
printk("%s\n", __func__);
mydev->gadget = gadget;
set_gadget_data(gadget, mydev);
gadget->ep0->driver_data = mydev;
/* Find all the endpoints we will use */
usb_ep_autoconfig_reset(gadget);
ep = usb_ep_autoconfig(gadget, &hw_dev.config.vc_interf.ep_desc);
if(!ep)
goto autoconf_fail;
ep->driver_data = mydev; // claim the endpoint
mydev->bulk_in = ep;
ep = usb_ep_autoconfig(gadget, &mygadget_fs_bulk_out_desc);
if(!ep)
goto autoconf_fail;
ep->driver_data = mydev; // claim the endpoint
mydev->bulk_out = ep;
if (gadget_is_dualspeed(gadget)) {
/* Assume ep0 uses the same maxpacket value for both speeds */
mygadget_dev_qualifier.bMaxPacketSize0 = gadget->ep0->maxpacket;
/* Assume endpoint addresses are the same for both speeds */
mygadget_hs_bulk_out_desc.bEndpointAddress =
mygadget_fs_bulk_out_desc.bEndpointAddress;
}
/* Allocate the request and buffer for endpoint 0 */
mydev->ep0req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
if(!mydev->ep0req)
goto error;
mydev->ep0req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL);
if (!mydev->ep0req->buf)
goto error;
mydev->ep0req->complete = mygadget_ep0_complete;
/* This should reflect the actual gadget power source */
usb_gadget_set_selfpowered(gadget);
/* kernel thread */
mydev->thread_task = kthread_create(mygadget_thread, mydev, "mygadget");
if (IS_ERR(mydev->thread_task)) {
ret = PTR_ERR(mydev->thread_task);
goto error;
}
DBG("I/O thread pid: %d\n", task_pid_nr(mydev->thread_task));
set_bit(REGISTERED, &mydev->atomic_bitflags);
/* Tell the thread to start working */
wake_up_process(mydev->thread_task);
//gcnum = usb_gadget_controller_number(gadget);
//if(gcnum >= 0)
// hw_dev.desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
//usb_gadget_set_selfpowered(gadget);
return 0;
autoconf_fail:
DBG("unable to autoconfigure all endpoints\n");
ret = -ENOTSUPP;
error:
mydev->state = MYGADGET_STATE_TERMINATED; // The thread is dead
mygadget_unbind(gadget);
complete(&mydev->thread_notifier);
return ret;
}
/* called by uvc_probe() in uvc/uvc_driver.c */
static int mygadget_init(void)
{
int rc;
printk("%s\n", __func__);
use_hw = 1;
gMygadget = kzalloc(sizeof(struct mygadget_dev), GFP_KERNEL);
if (!gMygadget)
return -ENOMEM;
spin_lock_init(&gMygadget->lock);
init_completion(&gMygadget->thread_notifier);
if((rc = usb_gadget_probe_driver(&mygadget_driver, mygadget_bind)) != 0) {
kfree(gMygadget);
gMygadget = NULL;
}
return rc;
}
/* called by uvc_disconnect() in uvc/uvc_driver.c */
static void mygadget_remove(void)
{
printk("%s\n", __func__);
/* Unregister the driver iff the thread hasn't already done so */
if (test_and_clear_bit(REGISTERED, &gMygadget->atomic_bitflags))
usb_gadget_unregister_driver(&mygadget_driver);
/* Wait for the thread to finish up */
wait_for_completion(&gMygadget->thread_notifier);
kfree(gMygadget);
gMygadget = NULL;
use_hw = 0;
}
void dump_dev_desc(int id, struct usb_config_descriptor desc)
{
printk("[config %d]:\n"
" bLength : %u\n"
" bDescriptorType : %u\n"
" bNumInterfaces : %u\n"
" bConfigurationValue: %u\n"
" iConfiguration : %u\n"
" bmAttributes : %02x\n",
id,
desc.bLength,
desc.bDescriptorType,
desc.bNumInterfaces,
desc.bConfigurationValue,
desc.iConfiguration,
desc.bmAttributes);
}
void dump_intf_assoc_desc(struct usb_interface_assoc_descriptor intf_assoc_desc)
{
printk(" [intf_assoc_desc]:\n"
" bLength : %u\n"
" bDescriptorType : %u\n"
" bFirstInterface : %u\n"
" bInterfaceCount : %u\n"
" bFunctionClass : %u\n"
" bFunctionSubClass: %u\n"
" bFunctionProtocol: %u\n"
" iFunction : %u\n",
intf_assoc_desc.bLength,
intf_assoc_desc.bDescriptorType,
intf_assoc_desc.bFirstInterface,
intf_assoc_desc.bInterfaceCount,
intf_assoc_desc.bFunctionClass,
intf_assoc_desc.bFunctionSubClass,
intf_assoc_desc.bFunctionProtocol,
intf_assoc_desc.iFunction);
}
void dump_intf_desc(int id, const char *str, struct usb_interface_descriptor intf_desc)
{
printk(" [intf_desc %d %s]:\n"
" bLength : %u\n"
" bDescriptorType : %u\n"
" bInterfaceNumber : %u\n"
" bAlternateSetting : %u\n"
" bNumEndpoints : %u\n"
" bInterfaceClass : %u\n"
" bInterfaceSubClass: %u\n"
" bInterfaceProtocol: %u\n"
" iInterface : %u\n",
id, str,
intf_desc.bLength,
intf_desc.bDescriptorType,
intf_desc.bInterfaceNumber,
intf_desc.bAlternateSetting,
intf_desc.bNumEndpoints,
intf_desc.bInterfaceClass,
intf_desc.bInterfaceSubClass,
intf_desc.bInterfaceProtocol,
intf_desc.iInterface);
}
void dump_vc_int_desc(struct vc_interface vc_intf)
{
printk(" [vc intf header desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType: %02x\n"
" bcdUVC : %04x\n"
" wTotalLength : %04x\n"
" dwClockFrequency : %08x\n"
" bInCollection : %02x\n"
" baInterfaceNr : %02x\n",
vc_intf.header_desc.bLength,
vc_intf.header_desc.bDescriptorType,
vc_intf.header_desc.bDescriptorSubType,
vc_intf.header_desc.bcdUVC,
vc_intf.header_desc.wTotalLength,
vc_intf.header_desc.dwClockFrequency,
vc_intf.header_desc.bInCollection,
vc_intf.header_desc.baInterfaceNr);
printk(" [vc intf it desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType : %02x\n"
" bTerminalID : %02x\n"
" wTerminalType : %04x\n"
" bAssocTerminal : %02x\n"
" iTerminal : %02x\n"
" wObjectiveFocalLengthMin: %04x\n"
" wObjectiveFocalLengthMax: %04x\n"
" wOcularFocalLength : %04x\n"
" bControlSize : %02x\n"
" bmControls : %06x\n",
vc_intf.it_desc.bLength,
vc_intf.it_desc.bDescriptorType,
vc_intf.it_desc.bDescriptorSubType,
vc_intf.it_desc.bTerminalID,
vc_intf.it_desc.wTerminalType,
vc_intf.it_desc.bAssocTerminal,
vc_intf.it_desc.iTerminal,
vc_intf.it_desc.wObjectiveFocalLengthMin,
vc_intf.it_desc.wObjectiveFocalLengthMax,
vc_intf.it_desc.wOcularFocalLength,
vc_intf.it_desc.bControlSize,
vc_intf.it_desc.bmControls);
printk(" [vc intf eu desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType: %02x\n"
" bUnitID : %02x\n"
// " guidExtensionCode : %s\n"
" bNumControls : %02x\n"
" bNrPins : %02x\n"
" baSourceID : %02x\n"
" bControlSize : %02x\n"
" bmControls : %02x\n"
" iExtension : %02x\n",
vc_intf.eu_desc.bLength,
vc_intf.eu_desc.bDescriptorType,
vc_intf.eu_desc.bDescriptorSubType,
vc_intf.eu_desc.bUnitID,
// vc_intf.eu_desc.guidExtensionCode,
vc_intf.eu_desc.bNumControls,
vc_intf.eu_desc.bNrPins,
vc_intf.eu_desc.baSourceID,
vc_intf.eu_desc.bControlSize,
vc_intf.eu_desc.bmControls,
vc_intf.eu_desc.iExtension);
printk(" [vc intf pu desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType: %02x\n"
" bUnitID : %02x\n"
" baSourceID : %02x\n"
" wMaxMultiplier : %04x\n"
" bControlSize : %02x\n"
" bmControls : %04x\n"
" iProcessing : %02x\n",
vc_intf.pu_desc.bLength,
vc_intf.pu_desc.bDescriptorType,
vc_intf.pu_desc.bDescriptorSubType,
vc_intf.pu_desc.bUnitID,
vc_intf.pu_desc.baSourceID,
vc_intf.pu_desc.wMaxMultiplier,
vc_intf.pu_desc.bControlSize,
vc_intf.pu_desc.bmControls,
vc_intf.pu_desc.iProcessing);
printk(" [vc intf ot desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType: %02x\n"
" bTerminalID : %02x\n"
" wTerminalType : %04x\n"
" bAssocTerminal : %02x\n"
" bSourceID : %02x\n"
" iTerminal : %02x\n",
vc_intf.ot_desc.bLength,
vc_intf.ot_desc.bDescriptorType,
vc_intf.ot_desc.bDescriptorSubType,
vc_intf.ot_desc.bTerminalID,
vc_intf.ot_desc.wTerminalType,
vc_intf.ot_desc.bAssocTerminal,
vc_intf.ot_desc.bSourceID,
vc_intf.ot_desc.iTerminal);
}
void dump_ep_desc(struct usb_endpoint_descriptor ep_desc)
{
printk(" [ep_desc]:\n"
" bLength : %u\n"
" bDescriptorType : %u\n"
" bEndpointAddress: 0x%02x\n"
" bmAttributes : %u\n"
" bInterval : %u\n"
" bRefresh : %u\n"
" bSynchAddress : %u\n",
ep_desc.bLength,
ep_desc.bDescriptorType,
ep_desc.bEndpointAddress,
ep_desc.bmAttributes,
ep_desc.bInterval,
ep_desc.bRefresh,
ep_desc.bSynchAddress);
}
void dump_vs_int_desc(struct vs_interface vs_intf)
{
int i = 0;
printk(" [vs intf header desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType : %02x\n"
" bNumFormats : %02x\n"
" wTotalLength : %04x\n"
" bEndPointAddress : %02x\n"
" bmInfo : %02x\n"
" bTerminalLink : %02x\n"
" bStillCaptureMethod: %02x\n"
" bTriggerSupport : %02x\n"
" bTriggerUsage : %02x\n"
" bControlSize : %02x\n"
" bmaControls(0) : %02x\n"
" bmaControls(1) : %02x\n",
vs_intf.header_desc.bLength,
vs_intf.header_desc.bDescriptorType,
vs_intf.header_desc.bDescriptorSubType,
vs_intf.header_desc.bNumFormats,
vs_intf.header_desc.wTotalLength,
vs_intf.header_desc.bEndPointAddress,
vs_intf.header_desc.bmInfo,
vs_intf.header_desc.bTerminalLink,
vs_intf.header_desc.bStillCaptureMethod,
vs_intf.header_desc.bTriggerSupport,
vs_intf.header_desc.bTriggerUsage,
vs_intf.header_desc.bControlSize,
vs_intf.header_desc.bmaControls[0],
vs_intf.header_desc.bmaControls[1]);
printk(" [vs intf format mjpeg desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType : %02x\n"
" bFormatIndex : %02x\n"
" bNumFrameDescriptors: %02x\n"
" bFlags : %02x\n"
" bDefaultFrameIndex : %02x\n"
" bAspectRatioX : %02x\n"
" bAspectRatioY : %02x\n"
" bmInterlaceFlags : %04x\n",
vs_intf.mjpg_fmt_desc.bLength,
vs_intf.mjpg_fmt_desc.bDescriptorType,
vs_intf.mjpg_fmt_desc.bDescriptorSubtype,
vs_intf.mjpg_fmt_desc.bFormatIndex,
vs_intf.mjpg_fmt_desc.bNumFrameDescriptors,
vs_intf.mjpg_fmt_desc.bFlags,
vs_intf.mjpg_fmt_desc.bDefaultFrameIndex,
vs_intf.mjpg_fmt_desc.bAspectRatioX,
vs_intf.mjpg_fmt_desc.bAspectRatioY,
vs_intf.mjpg_fmt_desc.bmInterlaceFlags);
for(i=0; i<9; i++) {
printk(" [vs intf mjpeg frame %d desc]:\n"
" bLength : %02x\n"
" bDescriptorType : %02x\n"
" bDescriptorSubType : %02x\n"
" bFrameIndex : %02x\n"
" bmCapabilities : %02x\n"
" wWidth : %04x\n"
" wHeight : %04x\n"
" dwMinBitRate : %08x\n"
" dwMaxBitRate : %08x\n"
" dwMaxVideoFrameBufferSize: %08x\n"
" dwDefaultFrameInterval : %08x\n"
" bFrameIntervalType : %02x\n"
" dwFrameInterval : %04x\n",
i,
vs_intf.mjpg_frame_desc[i].bLength,
vs_intf.mjpg_frame_desc[i].bDescriptorType,
vs_intf.mjpg_frame_desc[i].bDescriptorSubtype,
vs_intf.mjpg_frame_desc[i].bFrameIndex,
vs_intf.mjpg_frame_desc[i].bmCapabilities,
vs_intf.mjpg_frame_desc[i].wWidth,
vs_intf.mjpg_frame_desc[i].wHeight,
vs_intf.mjpg_frame_desc[i].dwMinBitRate,
vs_intf.mjpg_frame_desc[i].dwMaxBitRate,
vs_intf.mjpg_frame_desc[i].dwMaxVideoFrameBufferSize,
vs_intf.mjpg_frame_desc[i].dwDefaultFrameInterval,
vs_intf.mjpg_frame_desc[i].bFrameIntervalType,
vs_intf.mjpg_frame_desc[i].dwFrameInterval);
}
/*
struct vs_intf_still_desc {
u8 bLength;
u8 bDescriptorType;
u8 bDescriptorSubtype;
u8 bEndpointAddress;
u8 bNumImageSizePatterns;
struct ImageSizePattern bImageSize[8];
u8 bNumCompressionPatterns;
};
struct vs_intf_colorFormat_desc {
u8 bLength;
u8 bDescriptorType;
u8 bDescriptorSubtype;
u8 bColorPrimaries;
u8 bTransferCharacteristics;
u8 bMatrixCoefficients;
};
*/
}
uvc_probe (uvc_driver.c):
<pre name="code" class="cpp">#include <linux/kernel.h> #include <linux/list.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/usb.h> #include <linux/videodev2.h> #include <linux/vmalloc.h> #include <linux/wait.h> #include <asm/atomic.h> #include <asm/unaligned.h> #include <media/v4l2-common.h> #include "uvcvideo.h" /* fuchch 2015/10/28 */ #include "mygadget.c" static int otg_on; /* --------------- */ #define DRIVER_AUTHOR "Laurent Pinchart " \ "<[email protected]>" #define DRIVER_DESC "USB Video Class driver" unsigned int uvc_clock_param = CLOCK_MONOTONIC; unsigned int uvc_no_drop_param; static unsigned int uvc_quirks_param = -1; unsigned int uvc_trace_param; unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; /* ------------------------------------------------------------------------ * Video formats */ static struct uvc_format_desc uvc_fmts[] = { { .name = "YUV 4:2:2 (YUYV)", .guid = UVC_GUID_FORMAT_YUY2, .fcc = V4L2_PIX_FMT_YUYV, }, { .name = "YUV 4:2:2 (YUYV)", .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, .fcc = V4L2_PIX_FMT_YUYV, }, { .name = "YUV 4:2:0 (NV12)", .guid = UVC_GUID_FORMAT_NV12, .fcc = V4L2_PIX_FMT_NV12, }, { .name = "MJPEG", .guid = UVC_GUID_FORMAT_MJPEG, .fcc = V4L2_PIX_FMT_MJPEG, }, { .name = "YVU 4:2:0 (YV12)", .guid = UVC_GUID_FORMAT_YV12, .fcc = V4L2_PIX_FMT_YVU420, }, { .name = "YUV 4:2:0 (I420)", .guid = UVC_GUID_FORMAT_I420, .fcc = V4L2_PIX_FMT_YUV420, }, { .name = "YUV 4:2:0 (M420)", .guid = UVC_GUID_FORMAT_M420, .fcc = V4L2_PIX_FMT_M420, }, { .name = "YUV 4:2:2 (UYVY)", .guid = UVC_GUID_FORMAT_UYVY, .fcc = V4L2_PIX_FMT_UYVY, }, { .name = "Greyscale (8-bit)", .guid = UVC_GUID_FORMAT_Y800, .fcc = V4L2_PIX_FMT_GREY, }, { .name = "Greyscale (16-bit)", .guid = UVC_GUID_FORMAT_Y16, .fcc = V4L2_PIX_FMT_Y16, }, { .name = "RGB Bayer", .guid = UVC_GUID_FORMAT_BY8, .fcc = V4L2_PIX_FMT_SBGGR8, }, { .name = "RGB565", .guid = UVC_GUID_FORMAT_RGBP, .fcc = V4L2_PIX_FMT_RGB565, }, }; /* ------------------------------------------------------------------------ * Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, __u8 epaddr) { struct usb_host_endpoint *ep; unsigned int i; for (i = 0; i < alts->desc.bNumEndpoints; ++i) { ep = &alts->endpoint[i]; if (ep->desc.bEndpointAddress == epaddr) return ep; } return NULL; } static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16]) { unsigned int len = ARRAY_SIZE(uvc_fmts); unsigned int i; for (i = 0; i < len; ++i) { if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) return &uvc_fmts[i]; } return NULL; } static __u32 uvc_colorspace(const __u8 primaries) { static const __u8 colorprimaries[] = { 0, V4L2_COLORSPACE_SRGB, V4L2_COLORSPACE_470_SYSTEM_M, V4L2_COLORSPACE_470_SYSTEM_BG, V4L2_COLORSPACE_SMPTE170M, V4L2_COLORSPACE_SMPTE240M, }; if (primaries < ARRAY_SIZE(colorprimaries)) return colorprimaries[primaries]; return 0; } /* Simplify a fraction using a simple continued fraction decomposition. The * idea here is to convert fractions such as 333333/10000000 to 1/30 using * 32 bit arithmetic only. The algorithm is not perfect and relies upon two * arbitrary parameters to remove non-significative terms from the simple * continued fraction decomposition. Using 8 and 333 for n_terms and threshold * respectively seems to give nice results. */ void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, unsigned int n_terms, unsigned int threshold) { uint32_t *an; uint32_t x, y, r; unsigned int i, n; an = kmalloc(n_terms * sizeof *an, GFP_KERNEL); if (an == NULL) return; /* Convert the fraction to a simple continued fraction. See * http://mathforum.org/dr.math/faq/faq.fractions.html * Stop if the current term is bigger than or equal to the given * threshold. */ x = *numerator; y = *denominator; for (n = 0; n < n_terms && y != 0; ++n) { an[n] = x / y; if (an[n] >= threshold) { if (n < 2) n++; break; } r = x - an[n] * y; x = y; y = r; } /* Expand the simple continued fraction back to an integer fraction. */ x = 0; y = 1; for (i = n; i > 0; --i) { r = y; y = an[i-1] * y + x; x = r; } *numerator = y; *denominator = x; kfree(an); } /* Convert a fraction to a frame interval in 100ns multiples. The idea here is * to compute numerator / denominator * 10000000 using 32 bit fixed point * arithmetic only. */ uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator) { uint32_t multiplier; /* Saturate the result if the operation would overflow. */ if (denominator == 0 || numerator/denominator >= ((uint32_t)-1)/10000000) return (uint32_t)-1; /* Divide both the denominator and the multiplier by two until * numerator * multiplier doesn't overflow. If anyone knows a better * algorithm please let me know. */ multiplier = 10000000; while (numerator > ((uint32_t)-1)/multiplier) { multiplier /= 2; denominator /= 2; } return denominator ? numerator * multiplier / denominator : 0; } /* ------------------------------------------------------------------------ * Terminal and unit management */ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) { struct uvc_entity *entity; list_for_each_entry(entity, &dev->entities, list) { if (entity->id == id) return entity; } return NULL; } static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, int id, struct uvc_entity *entity) { unsigned int i; if (entity == NULL) entity = list_entry(&dev->entities, struct uvc_entity, list); list_for_each_entry_continue(entity, &dev->entities, list) { for (i = 0; i < entity->bNrInPins; ++i) if (entity->baSourceID[i] == id) return entity; } return NULL; } static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) { struct uvc_streaming *stream; list_for_each_entry(stream, &dev->streams, list) { if (stream->header.bTerminalLink == id) return stream; } return NULL; } /* ------------------------------------------------------------------------ * Descriptors parsing */ static int uvc_parse_format(struct uvc_device *dev, struct uvc_streaming *streaming, struct uvc_format *format, __u32 **intervals, unsigned char *buffer, int buflen) { struct usb_interface *intf = streaming->intf; struct usb_host_interface *alts = intf->cur_altsetting; struct uvc_format_desc *fmtdesc; struct uvc_frame *frame; const unsigned char *start = buffer; unsigned int interval; unsigned int i, n; __u8 ftype; format->type = buffer[2]; format->index = buffer[3]; switch (buffer[2]) { case UVC_VS_FORMAT_UNCOMPRESSED: case UVC_VS_FORMAT_FRAME_BASED: n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; if (buflen < n) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d FORMAT error\n", dev->udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } /* Find the format descriptor from its GUID. */ fmtdesc = uvc_format_by_guid(&buffer[5]); if (fmtdesc != NULL) { strlcpy(format->name, fmtdesc->name, sizeof format->name); format->fcc = fmtdesc->fcc; } else { uvc_printk(KERN_INFO, "Unknown video format %pUl\n", &buffer[5]); snprintf(format->name, sizeof(format->name), "%pUl\n", &buffer[5]); format->fcc = 0; } format->bpp = buffer[21]; if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { ftype = UVC_VS_FRAME_UNCOMPRESSED; } else { ftype = UVC_VS_FRAME_FRAME_BASED; if (buffer[27]) format->flags = UVC_FMT_FLAG_COMPRESSED; } break; case UVC_VS_FORMAT_MJPEG: if (buflen < 11) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d FORMAT error\n", dev->udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } strlcpy(format->name, "MJPEG", sizeof format->name); format->fcc = V4L2_PIX_FMT_MJPEG; format->flags = UVC_FMT_FLAG_COMPRESSED; format->bpp = 0; ftype = UVC_VS_FRAME_MJPEG; break; case UVC_VS_FORMAT_DV: if (buflen < 9) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d FORMAT error\n", dev->udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } switch (buffer[8] & 0x7f) { case 0: strlcpy(format->name, "SD-DV", sizeof format->name); break; case 1: strlcpy(format->name, "SDL-DV", sizeof format->name); break; case 2: strlcpy(format->name, "HD-DV", sizeof format->name); break; default: uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d: unknown DV format %u\n", dev->udev->devnum, alts->desc.bInterfaceNumber, buffer[8]); return -EINVAL; } strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", sizeof format->name); format->fcc = V4L2_PIX_FMT_DV; format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; format->bpp = 0; ftype = 0; /* Create a dummy frame descriptor. */ frame = &format->frame[0]; memset(&format->frame[0], 0, sizeof format->frame[0]); frame->bFrameIntervalType = 1; frame->dwDefaultFrameInterval = 1; frame->dwFrameInterval = *intervals; *(*intervals)++ = 1; format->nframes = 1; break; case UVC_VS_FORMAT_MPEG2TS: case UVC_VS_FORMAT_STREAM_BASED: /* Not supported yet. */ default: uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d unsupported format %u\n", dev->udev->devnum, alts->desc.bInterfaceNumber, buffer[2]); return -EINVAL; } uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); buflen -= buffer[0]; buffer += buffer[0]; /* Parse the frame descriptors. Only uncompressed, MJPEG and frame * based formats have frame descriptors. */ while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && buffer[2] == ftype) { frame = &format->frame[format->nframes]; if (ftype != UVC_VS_FRAME_FRAME_BASED) n = buflen > 25 ? buffer[25] : 0; else n = buflen > 21 ? buffer[21] : 0; n = n ? n : 3; if (buflen < 26 + 4*n) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d FRAME error\n", dev->udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } frame->bFrameIndex = buffer[3]; frame->bmCapabilities = buffer[4]; frame->wWidth = get_unaligned_le16(&buffer[5]); frame->wHeight = get_unaligned_le16(&buffer[7]); frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); if (ftype != UVC_VS_FRAME_FRAME_BASED) { frame->dwMaxVideoFrameBufferSize = get_unaligned_le32(&buffer[17]); frame->dwDefaultFrameInterval = get_unaligned_le32(&buffer[21]); frame->bFrameIntervalType = buffer[25]; } else { frame->dwMaxVideoFrameBufferSize = 0; frame->dwDefaultFrameInterval = get_unaligned_le32(&buffer[17]); frame->bFrameIntervalType = buffer[21]; } frame->dwFrameInterval = *intervals; /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize * completely. Observed behaviours range from setting the * value to 1.1x the actual frame size to hardwiring the * 16 low bits to 0. This results in a higher than necessary * memory usage as well as a wrong image size information. For * uncompressed formats this can be fixed by computing the * value from the frame size. */ if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) frame->dwMaxVideoFrameBufferSize = format->bpp * frame->wWidth * frame->wHeight / 8; /* Some bogus devices report dwMinFrameInterval equal to * dwMaxFrameInterval and have dwFrameIntervalStep set to * zero. Setting all null intervals to 1 fixes the problem and * some other divisions by zero that could happen. */ for (i = 0; i < n; ++i) { interval = get_unaligned_le32(&buffer[26+4*i]); *(*intervals)++ = interval ? interval : 1; } /* Make sure that the default frame interval stays between * the boundaries. */ n -= frame->bFrameIntervalType ? 1 : 2; frame->dwDefaultFrameInterval = min(frame->dwFrameInterval[n], max(frame->dwFrameInterval[0], frame->dwDefaultFrameInterval)); if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { frame->bFrameIntervalType = 1; frame->dwFrameInterval[0] = frame->dwDefaultFrameInterval; } uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", frame->wWidth, frame->wHeight, 10000000/frame->dwDefaultFrameInterval, (100000000/frame->dwDefaultFrameInterval)%10); format->nframes++; buflen -= buffer[0]; buffer += buffer[0]; } if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { buflen -= buffer[0]; buffer += buffer[0]; } if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && buffer[2] == UVC_VS_COLORFORMAT) { if (buflen < 6) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d COLORFORMAT error\n", dev->udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } format->colorspace = uvc_colorspace(buffer[3]); buflen -= buffer[0]; buffer += buffer[0]; } return buffer - start; } static int uvc_parse_streaming(struct uvc_device *dev, struct usb_interface *intf) { struct uvc_streaming *streaming = NULL; struct uvc_format *format; struct uvc_frame *frame; struct usb_host_interface *alts = &intf->altsetting[0]; unsigned char *_buffer, *buffer = alts->extra; int _buflen, buflen = alts->extralen; unsigned int nformats = 0, nframes = 0, nintervals = 0; unsigned int size, i, n, p; __u32 *interval; __u16 psize; int ret = -EINVAL; if (intf->cur_altsetting->desc.bInterfaceSubClass != UVC_SC_VIDEOSTREAMING) { uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " "video streaming interface\n", dev->udev->devnum, intf->altsetting[0].desc.bInterfaceNumber); return -EINVAL; } if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " "claimed\n", dev->udev->devnum, intf->altsetting[0].desc.bInterfaceNumber); return -EINVAL; } streaming = kzalloc(sizeof *streaming, GFP_KERNEL); if (streaming == NULL) { usb_driver_release_interface(&uvc_driver.driver, intf); return -EINVAL; } mutex_init(&streaming->mutex); streaming->dev = dev; streaming->intf = usb_get_intf(intf); streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; /* The Pico iMage webcam has its class-specific interface descriptors * after the endpoint descriptors. */ if (buflen == 0) { for (i = 0; i < alts->desc.bNumEndpoints; ++i) { struct usb_host_endpoint *ep = &alts->endpoint[i]; if (ep->extralen == 0) continue; if (ep->extralen > 2 && ep->extra[1] == USB_DT_CS_INTERFACE) { uvc_trace(UVC_TRACE_DESCR, "trying extra data " "from endpoint %u.\n", i); buffer = alts->endpoint[i].extra; buflen = alts->endpoint[i].extralen; break; } } } /* Skip the standard interface descriptors. */ while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { buflen -= buffer[0]; buffer += buffer[0]; } if (buflen <= 2) { uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " "interface descriptors found.\n"); goto error; } /* Parse the header descriptor. */ switch (buffer[2]) { case UVC_VS_OUTPUT_HEADER: streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; size = 9; break; case UVC_VS_INPUT_HEADER: streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; size = 13; break; default: uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " "%d HEADER descriptor not found.\n", dev->udev->devnum, alts->desc.bInterfaceNumber); goto error; } p = buflen >= 4 ? buffer[3] : 0; n = buflen >= size ? buffer[size-1] : 0; if (buflen < size + p*n) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d HEADER descriptor is invalid.\n", dev->udev->devnum, alts->desc.bInterfaceNumber); goto error; } streaming->header.bNumFormats = p; streaming->header.bEndpointAddress = buffer[6]; if (buffer[2] == UVC_VS_INPUT_HEADER) { streaming->header.bmInfo = buffer[7]; streaming->header.bTerminalLink = buffer[8]; streaming->header.bStillCaptureMethod = buffer[9]; streaming->header.bTriggerSupport = buffer[10]; streaming->header.bTriggerUsage = buffer[11]; } else { streaming->header.bTerminalLink = buffer[7]; } streaming->header.bControlSize = n; streaming->header.bmaControls = kmemdup(&buffer[size], p * n, GFP_KERNEL); if (streaming->header.bmaControls == NULL) { ret = -ENOMEM; goto error; } buflen -= buffer[0]; buffer += buffer[0]; _buffer = buffer; _buflen = buflen; /* Count the format and frame descriptors. */ while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { switch (_buffer[2]) { case UVC_VS_FORMAT_UNCOMPRESSED: case UVC_VS_FORMAT_MJPEG: case UVC_VS_FORMAT_FRAME_BASED: nformats++; break; case UVC_VS_FORMAT_DV: /* DV format has no frame descriptor. We will create a * dummy frame descriptor with a dummy frame interval. */ nformats++; nframes++; nintervals++; break; case UVC_VS_FORMAT_MPEG2TS: case UVC_VS_FORMAT_STREAM_BASED: uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " "interface %d FORMAT %u is not supported.\n", dev->udev->devnum, alts->desc.bInterfaceNumber, _buffer[2]); break; case UVC_VS_FRAME_UNCOMPRESSED: case UVC_VS_FRAME_MJPEG: nframes++; if (_buflen > 25) nintervals += _buffer[25] ? _buffer[25] : 3; break; case UVC_VS_FRAME_FRAME_BASED: nframes++; if (_buflen > 21) nintervals += _buffer[21] ? _buffer[21] : 3; break; } _buflen -= _buffer[0]; _buffer += _buffer[0]; } if (nformats == 0) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " "%d has no supported formats defined.\n", dev->udev->devnum, alts->desc.bInterfaceNumber); goto error; } size = nformats * sizeof *format + nframes * sizeof *frame + nintervals * sizeof *interval; format = kzalloc(size, GFP_KERNEL); if (format == NULL) { ret = -ENOMEM; goto error; } frame = (struct uvc_frame *)&format[nformats]; interval = (__u32 *)&frame[nframes]; streaming->format = format; streaming->nformats = nformats; /* Parse the format descriptors. */ while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { switch (buffer[2]) { case UVC_VS_FORMAT_UNCOMPRESSED: case UVC_VS_FORMAT_MJPEG: case UVC_VS_FORMAT_DV: case UVC_VS_FORMAT_FRAME_BASED: format->frame = frame; ret = uvc_parse_format(dev, streaming, format, &interval, buffer, buflen); if (ret < 0) goto error; frame += format->nframes; format++; buflen -= ret; buffer += ret; continue; default: break; } buflen -= buffer[0]; buffer += buffer[0]; } if (buflen) uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " "%d has %u bytes of trailing descriptor garbage.\n", dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); /* Parse the alternate settings to find the maximum bandwidth. */ for (i = 0; i < intf->num_altsetting; ++i) { struct usb_host_endpoint *ep; alts = &intf->altsetting[i]; ep = uvc_find_endpoint(alts, streaming->header.bEndpointAddress); if (ep == NULL) continue; psize = le16_to_cpu(ep->desc.wMaxPacketSize); psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); if (psize > streaming->maxpsize) streaming->maxpsize = psize; } list_add_tail(&streaming->list, &dev->streams); return 0; error: usb_driver_release_interface(&uvc_driver.driver, intf); usb_put_intf(intf); kfree(streaming->format); kfree(streaming->header.bmaControls); kfree(streaming); return ret; } static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, unsigned int num_pads, unsigned int extra_size) { struct uvc_entity *entity; unsigned int num_inputs; unsigned int size; unsigned int i; extra_size = ALIGN(extra_size, sizeof(*entity->pads)); num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads + num_inputs; entity = kzalloc(size, GFP_KERNEL); if (entity == NULL) return NULL; entity->id = id; entity->type = type; entity->num_links = 0; entity->num_pads = num_pads; entity->pads = ((void *)(entity + 1)) + extra_size; for (i = 0; i < num_inputs; ++i) entity->pads[i].flags = MEDIA_PAD_FL_SINK; if (!UVC_ENTITY_IS_OTERM(entity)) entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; entity->bNrInPins = num_inputs; entity->baSourceID = (__u8 *)(&entity->pads[num_pads]); return entity; } /* Parse vendor-specific extensions. */ static int uvc_parse_vendor_control(struct uvc_device *dev, const unsigned char *buffer, int buflen) { struct usb_device *udev = dev->udev; struct usb_host_interface *alts = dev->intf->cur_altsetting; struct uvc_entity *unit; unsigned int n, p; int handled = 0; switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { case 0x046d: /* Logitech */ if (buffer[1] != 0x41 || buffer[2] != 0x01) break; /* Logitech implements several vendor specific functions * through vendor specific extension units (LXU). * * The LXU descriptors are similar to XU descriptors * (see "USB Device Video Class for Video Devices", section * 3.7.2.6 "Extension Unit Descriptor") with the following * differences: * * ---------------------------------------------------------- * 0 bLength 1 Number * Size of this descriptor, in bytes: 24+p+n*2 * ---------------------------------------------------------- * 23+p+n bmControlsType N Bitmap * Individual bits in the set are defined: * 0: Absolute * 1: Relative * * This bitset is mapped exactly the same as bmControls. * ---------------------------------------------------------- * 23+p+n*2 bReserved 1 Boolean * ---------------------------------------------------------- * 24+p+n*2 iExtension 1 Index * Index of a string descriptor that describes this * extension unit. * ---------------------------------------------------------- */ p = buflen >= 22 ? buffer[21] : 0; n = buflen >= 25 + p ? buffer[22+p] : 0; if (buflen < 25 + p + 2*n) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d EXTENSION_UNIT error\n", udev->devnum, alts->desc.bInterfaceNumber); break; } unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], p + 1, 2*n); if (unit == NULL) return -ENOMEM; memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; memcpy(unit->baSourceID, &buffer[22], p); unit->extension.bControlSize = buffer[22+p]; unit->extension.bmControls = (__u8 *)unit + sizeof(*unit); unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit) + n; memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); if (buffer[24+p+2*n] != 0) usb_string(udev, buffer[24+p+2*n], unit->name, sizeof unit->name); else sprintf(unit->name, "Extension %u", buffer[3]); list_add_tail(&unit->list, &dev->entities); handled = 1; break; } return handled; } static int uvc_parse_standard_control(struct uvc_device *dev, const unsigned char *buffer, int buflen) { struct usb_device *udev = dev->udev; struct uvc_entity *unit, *term; struct usb_interface *intf; struct usb_host_interface *alts = dev->intf->cur_altsetting; unsigned int i, n, p, len; __u16 type; switch (buffer[2]) { case UVC_VC_HEADER: n = buflen >= 12 ? buffer[11] : 0; if (buflen < 12 || buflen < 12 + n) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d HEADER error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } dev->uvc_version = get_unaligned_le16(&buffer[3]); dev->clock_frequency = get_unaligned_le32(&buffer[7]); /* Parse all USB Video Streaming interfaces. */ for (i = 0; i < n; ++i) { intf = usb_ifnum_to_if(udev, buffer[12+i]); if (intf == NULL) { uvc_trace(UVC_TRACE_DESCR, "device %d " "interface %d doesn't exists\n", udev->devnum, i); continue; } uvc_parse_streaming(dev, intf); } break; case UVC_VC_INPUT_TERMINAL: if (buflen < 8) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d INPUT_TERMINAL error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } /* Make sure the terminal type MSB is not null, otherwise it * could be confused with a unit. */ type = get_unaligned_le16(&buffer[4]); if ((type & 0xff00) == 0) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d INPUT_TERMINAL %d has invalid " "type 0x%04x, skipping\n", udev->devnum, alts->desc.bInterfaceNumber, buffer[3], type); return 0; } n = 0; p = 0; len = 8; if (type == UVC_ITT_CAMERA) { n = buflen >= 15 ? buffer[14] : 0; len = 15; } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { n = buflen >= 9 ? buffer[8] : 0; p = buflen >= 10 + n ? buffer[9+n] : 0; len = 10; } if (buflen < len + n + p) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d INPUT_TERMINAL error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1, n + p); if (term == NULL) return -ENOMEM; if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { term->camera.bControlSize = n; term->camera.bmControls = (__u8 *)term + sizeof *term; term->camera.wObjectiveFocalLengthMin = get_unaligned_le16(&buffer[8]); term->camera.wObjectiveFocalLengthMax = get_unaligned_le16(&buffer[10]); term->camera.wOcularFocalLength = get_unaligned_le16(&buffer[12]); memcpy(term->camera.bmControls, &buffer[15], n); } else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) { term->media.bControlSize = n; term->media.bmControls = (__u8 *)term + sizeof *term; term->media.bTransportModeSize = p; term->media.bmTransportModes = (__u8 *)term + sizeof *term + n; memcpy(term->media.bmControls, &buffer[9], n); memcpy(term->media.bmTransportModes, &buffer[10+n], p); } if (buffer[7] != 0) usb_string(udev, buffer[7], term->name, sizeof term->name); else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) sprintf(term->name, "Camera %u", buffer[3]); else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) sprintf(term->name, "Media %u", buffer[3]); else sprintf(term->name, "Input %u", buffer[3]); list_add_tail(&term->list, &dev->entities); break; case UVC_VC_OUTPUT_TERMINAL: if (buflen < 9) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d OUTPUT_TERMINAL error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } /* Make sure the terminal type MSB is not null, otherwise it * could be confused with a unit. */ type = get_unaligned_le16(&buffer[4]); if ((type & 0xff00) == 0) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d OUTPUT_TERMINAL %d has invalid " "type 0x%04x, skipping\n", udev->devnum, alts->desc.bInterfaceNumber, buffer[3], type); return 0; } term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1, 0); if (term == NULL) return -ENOMEM; memcpy(term->baSourceID, &buffer[7], 1); if (buffer[8] != 0) usb_string(udev, buffer[8], term->name, sizeof term->name); else sprintf(term->name, "Output %u", buffer[3]); list_add_tail(&term->list, &dev->entities); break; case UVC_VC_SELECTOR_UNIT: p = buflen >= 5 ? buffer[4] : 0; if (buflen < 5 || buflen < 6 + p) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d SELECTOR_UNIT error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); if (unit == NULL) return -ENOMEM; memcpy(unit->baSourceID, &buffer[5], p); if (buffer[5+p] != 0) usb_string(udev, buffer[5+p], unit->name, sizeof unit->name); else sprintf(unit->name, "Selector %u", buffer[3]); list_add_tail(&unit->list, &dev->entities); break; case UVC_VC_PROCESSING_UNIT: n = buflen >= 8 ? buffer[7] : 0; p = dev->uvc_version >= 0x0110 ? 10 : 9; if (buflen < p + n) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d PROCESSING_UNIT error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); if (unit == NULL) return -ENOMEM; memcpy(unit->baSourceID, &buffer[4], 1); unit->processing.wMaxMultiplier = get_unaligned_le16(&buffer[5]); unit->processing.bControlSize = buffer[7]; unit->processing.bmControls = (__u8 *)unit + sizeof *unit; memcpy(unit->processing.bmControls, &buffer[8], n); if (dev->uvc_version >= 0x0110) unit->processing.bmVideoStandards = buffer[9+n]; if (buffer[8+n] != 0) usb_string(udev, buffer[8+n], unit->name, sizeof unit->name); else sprintf(unit->name, "Processing %u", buffer[3]); list_add_tail(&unit->list, &dev->entities); break; case UVC_VC_EXTENSION_UNIT: p = buflen >= 22 ? buffer[21] : 0; n = buflen >= 24 + p ? buffer[22+p] : 0; if (buflen < 24 + p + n) { uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " "interface %d EXTENSION_UNIT error\n", udev->devnum, alts->desc.bInterfaceNumber); return -EINVAL; } unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); if (unit == NULL) return -ENOMEM; memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; memcpy(unit->baSourceID, &buffer[22], p); unit->extension.bControlSize = buffer[22+p]; unit->extension.bmControls = (__u8 *)unit + sizeof *unit; memcpy(unit->extension.bmControls, &buffer[23+p], n); if (buffer[23+p+n] != 0) usb_string(udev, buffer[23+p+n], unit->name, sizeof unit->name); else sprintf(unit->name, "Extension %u", buffer[3]); list_add_tail(&unit->list, &dev->entities); break; default: uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " "descriptor (%u)\n", buffer[2]); break; } return 0; } static int uvc_parse_control(struct uvc_device *dev) { struct usb_host_interface *alts = dev->intf->cur_altsetting; unsigned char *buffer = alts->extra; int buflen = alts->extralen; int ret; /* Parse the default alternate setting only, as the UVC specification * defines a single alternate setting, the default alternate setting * zero. */ while (buflen > 2) { if (uvc_parse_vendor_control(dev, buffer, buflen) || buffer[1] != USB_DT_CS_INTERFACE) goto next_descriptor; if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) return ret; next_descriptor: buflen -= buffer[0]; buffer += buffer[0]; } /* Check if the optional status endpoint is present. Built-in iSight * webcams have an interrupt endpoint but spit proprietary data that * don't conform to the UVC status endpoint messages. Don't try to * handle the interrupt endpoint for those cameras. */ if (alts->desc.bNumEndpoints == 1 && !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { struct usb_host_endpoint *ep = &alts->endpoint[0]; struct usb_endpoint_descriptor *desc = &ep->desc; if (usb_endpoint_is_int_in(desc) && le16_to_cpu(desc->wMaxPacketSize) >= 8 && desc->bInterval != 0) { uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " "(addr %02x).\n", desc->bEndpointAddress); dev->int_ep = ep; } } return 0; } /* ------------------------------------------------------------------------ * UVC device scan */ /* * Scan the UVC descriptors to locate a chain starting at an Output Terminal * and containing the following units: * * - one or more Output Terminals (USB Streaming or Display) * - zero or one Processing Unit * - zero, one or more single-input Selector Units * - zero or one multiple-input Selector Units, provided all inputs are * connected to input terminals * - zero, one or mode single-input Extension Units * - one or more Input Terminals (Camera, External or USB Streaming) * * The terminal and units must match on of the following structures: * * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) * * +---------+ +---------+ -> OTT_*(0) * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... * +---------+ +---------+ -> OTT_*(n) * * The Processing Unit and Extension Units can be in any order. Additional * Extension Units connected to the main chain as single-unit branches are * also supported. Single-input Selector Units are ignored. */ static int uvc_scan_chain_entity(struct uvc_video_chain *chain, struct uvc_entity *entity) { switch (UVC_ENTITY_TYPE(entity)) { case UVC_VC_EXTENSION_UNIT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- XU %d", entity->id); if (entity->bNrInPins != 1) { uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " "than 1 input pin.\n", entity->id); return -1; } break; case UVC_VC_PROCESSING_UNIT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- PU %d", entity->id); if (chain->processing != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple " "Processing Units in chain.\n"); return -1; } chain->processing = entity; break; case UVC_VC_SELECTOR_UNIT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- SU %d", entity->id); /* Single-input selector units are ignored. */ if (entity->bNrInPins == 1) break; if (chain->selector != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " "Units in chain.\n"); return -1; } chain->selector = entity; break; case UVC_ITT_VENDOR_SPECIFIC: case UVC_ITT_CAMERA: case UVC_ITT_MEDIA_TRANSPORT_INPUT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT %d\n", entity->id); break; case UVC_OTT_VENDOR_SPECIFIC: case UVC_OTT_DISPLAY: case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" OT %d", entity->id); break; case UVC_TT_STREAMING: if (UVC_ENTITY_IS_ITERM(entity)) { if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT %d\n", entity->id); } else { if (uvc_trace_param & UVC_TRACE_PROBE) printk(" OT %d", entity->id); } break; default: uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); return -1; } list_add_tail(&entity->chain, &chain->entities); return 0; } static int uvc_scan_chain_forward(struct uvc_video_chain *chain, struct uvc_entity *entity, struct uvc_entity *prev) { struct uvc_entity *forward; int found; /* Forward scan */ forward = NULL; found = 0; while (1) { forward = uvc_entity_by_reference(chain->dev, entity->id, forward); if (forward == NULL) break; if (forward == prev) continue; switch (UVC_ENTITY_TYPE(forward)) { case UVC_VC_EXTENSION_UNIT: if (forward->bNrInPins != 1) { uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " "has more than 1 input pin.\n", entity->id); return -EINVAL; } list_add_tail(&forward->chain, &chain->entities); if (uvc_trace_param & UVC_TRACE_PROBE) { if (!found) printk(" (->"); printk(" XU %d", forward->id); found = 1; } break; case UVC_OTT_VENDOR_SPECIFIC: case UVC_OTT_DISPLAY: case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: case UVC_TT_STREAMING: if (UVC_ENTITY_IS_ITERM(forward)) { uvc_trace(UVC_TRACE_DESCR, "Unsupported input " "terminal %u.\n", forward->id); return -EINVAL; } list_add_tail(&forward->chain, &chain->entities); if (uvc_trace_param & UVC_TRACE_PROBE) { if (!found) printk(" (->"); printk(" OT %d", forward->id); found = 1; } break; } } if (found) printk(")"); return 0; } static int uvc_scan_chain_backward(struct uvc_video_chain *chain, struct uvc_entity **_entity) { struct uvc_entity *entity = *_entity; struct uvc_entity *term; int id = -EINVAL, i; switch (UVC_ENTITY_TYPE(entity)) { case UVC_VC_EXTENSION_UNIT: case UVC_VC_PROCESSING_UNIT: id = entity->baSourceID[0]; break; case UVC_VC_SELECTOR_UNIT: /* Single-input selector units are ignored. */ if (entity->bNrInPins == 1) { id = entity->baSourceID[0]; break; } if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT"); chain->selector = entity; for (i = 0; i < entity->bNrInPins; ++i) { id = entity->baSourceID[i]; term = uvc_entity_by_id(chain->dev, id); if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " "input %d isn't connected to an " "input terminal\n", entity->id, i); return -1; } if (uvc_trace_param & UVC_TRACE_PROBE) printk(" %d", term->id); list_add_tail(&term->chain, &chain->entities); uvc_scan_chain_forward(chain, term, entity); } if (uvc_trace_param & UVC_TRACE_PROBE) printk("\n"); id = 0; break; case UVC_ITT_VENDOR_SPECIFIC: case UVC_ITT_CAMERA: case UVC_ITT_MEDIA_TRANSPORT_INPUT: case UVC_OTT_VENDOR_SPECIFIC: case UVC_OTT_DISPLAY: case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: case UVC_TT_STREAMING: id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; break; } if (id <= 0) { *_entity = NULL; return id; } entity = uvc_entity_by_id(chain->dev, id); if (entity == NULL) { uvc_trace(UVC_TRACE_DESCR, "Found reference to " "unknown entity %d.\n", id); return -EINVAL; } *_entity = entity; return 0; } static int uvc_scan_chain(struct uvc_video_chain *chain, struct uvc_entity *term) { struct uvc_entity *entity, *prev; uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); entity = term; prev = NULL; while (entity != NULL) { /* Entity must not be part of an existing chain */ if (entity->chain.next || entity->chain.prev) { uvc_trace(UVC_TRACE_DESCR, "Found reference to " "entity %d already in chain.\n", entity->id); return -EINVAL; } /* Process entity */ if (uvc_scan_chain_entity(chain, entity) < 0) return -EINVAL; /* Forward scan */ if (uvc_scan_chain_forward(chain, entity, prev) < 0) return -EINVAL; /* Backward scan */ prev = entity; if (uvc_scan_chain_backward(chain, &entity) < 0) return -EINVAL; } return 0; } static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, char *buffer) { struct uvc_entity *term; unsigned int nterms = 0; char *p = buffer; list_for_each_entry(term, terms, chain) { if (!UVC_ENTITY_IS_TERM(term) || UVC_TERM_DIRECTION(term) != dir) continue; if (nterms) p += sprintf(p, ","); if (++nterms >= 4) { p += sprintf(p, "..."); break; } p += sprintf(p, "%u", term->id); } return p - buffer; } static const char *uvc_print_chain(struct uvc_video_chain *chain) { static char buffer[43]; char *p = buffer; p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); p += sprintf(p, " -> "); uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); return buffer; } /* * Scan the device for video chains and register video devices. * * Chains are scanned starting at their output terminals and walked backwards. */ static int uvc_scan_device(struct uvc_device *dev) { struct uvc_video_chain *chain; struct uvc_entity *term; list_for_each_entry(term, &dev->entities, list) { if (!UVC_ENTITY_IS_OTERM(term)) continue; /* If the terminal is already included in a chain, skip it. * This can happen for chains that have multiple output * terminals, where all output terminals beside the first one * will be inserted in the chain in forward scans. */ if (term->chain.next || term->chain.prev) continue; chain = kzalloc(sizeof(*chain), GFP_KERNEL); if (chain == NULL) return -ENOMEM; INIT_LIST_HEAD(&chain->entities); mutex_init(&chain->ctrl_mutex); chain->dev = dev; if (uvc_scan_chain(chain, term) < 0) { kfree(chain); continue; } uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", uvc_print_chain(chain)); list_add_tail(&chain->list, &dev->chains); } if (list_empty(&dev->chains)) { uvc_printk(KERN_INFO, "No valid video chain found.\n"); return -1; } return 0; } /* ------------------------------------------------------------------------ * Video device registration and unregistration */ /* * Delete the UVC device. * * Called by the kernel when the last reference to the uvc_device structure * is released. * * As this function is called after or during disconnect(), all URBs have * already been canceled by the USB core. There is no need to kill the * interrupt URB manually. */ static void uvc_delete(struct uvc_device *dev) { struct list_head *p, *n; usb_put_intf(dev->intf); usb_put_dev(dev->udev); uvc_status_cleanup(dev); uvc_ctrl_cleanup_device(dev); if (dev->vdev.dev) v4l2_device_unregister(&dev->vdev); #ifdef CONFIG_MEDIA_CONTROLLER if (media_devnode_is_registered(&dev->mdev.devnode)) media_device_unregister(&dev->mdev); #endif list_for_each_safe(p, n, &dev->chains) { struct uvc_video_chain *chain; chain = list_entry(p, struct uvc_video_chain, list); kfree(chain); } list_for_each_safe(p, n, &dev->entities) { struct uvc_entity *entity; entity = list_entry(p, struct uvc_entity, list); #ifdef CONFIG_MEDIA_CONTROLLER uvc_mc_cleanup_entity(entity); #endif if (entity->vdev) { video_device_release(entity->vdev); entity->vdev = NULL; } kfree(entity); } list_for_each_safe(p, n, &dev->streams) { struct uvc_streaming *streaming; streaming = list_entry(p, struct uvc_streaming, list); usb_driver_release_interface(&uvc_driver.driver, streaming->intf); usb_put_intf(streaming->intf); kfree(streaming->format); kfree(streaming->header.bmaControls); kfree(streaming); } kfree(dev); } static void uvc_release(struct video_device *vdev) { struct uvc_streaming *stream = video_get_drvdata(vdev); struct uvc_device *dev = stream->dev; /* Decrement the registered streams count and delete the device when it * reaches zero. */ if (atomic_dec_and_test(&dev->nstreams)) uvc_delete(dev); } /* * Unregister the video devices. */ static void uvc_unregister_video(struct uvc_device *dev) { struct uvc_streaming *stream; /* Unregistering all video devices might result in uvc_delete() being * called from inside the loop if there's no open file handle. To avoid * that, increment the stream count before iterating over the streams * and decrement it when done. */ atomic_inc(&dev->nstreams); list_for_each_entry(stream, &dev->streams, list) { if (stream->vdev == NULL) continue; video_unregister_device(stream->vdev); stream->vdev = NULL; } /* Decrement the stream count and call uvc_delete explicitly if there * are no stream left. */ if (atomic_dec_and_test(&dev->nstreams)) uvc_delete(dev); } static int uvc_register_video(struct uvc_device *dev, struct uvc_streaming *stream) { struct video_device *vdev; int ret; /* Initialize the streaming interface with default streaming * parameters. */ ret = uvc_video_init(stream); if (ret < 0) { uvc_printk(KERN_ERR, "Failed to initialize the device " "(%d).\n", ret); return ret; } /* Register the device with V4L. */ vdev = video_device_alloc(); if (vdev == NULL) { uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n", ret); return -ENOMEM; } /* We already hold a reference to dev->udev. The video device will be * unregistered before the reference is released, so we don't need to * get another one. */ vdev->v4l2_dev = &dev->vdev; vdev->fops = &uvc_fops; vdev->release = uvc_release; strlcpy(vdev->name, dev->name, sizeof vdev->name); /* Set the driver data before calling video_register_device, otherwise * uvc_v4l2_open might race us. */ stream->vdev = vdev; video_set_drvdata(vdev, stream); ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); if (ret < 0) { uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", ret); stream->vdev = NULL; video_device_release(vdev); return ret; } atomic_inc(&dev->nstreams); return 0; } /* * Register all video devices in all chains. */ static int uvc_register_terms(struct uvc_device *dev, struct uvc_video_chain *chain) { struct uvc_streaming *stream; struct uvc_entity *term; int ret; list_for_each_entry(term, &chain->entities, chain) { if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) continue; stream = uvc_stream_by_id(dev, term->id); if (stream == NULL) { uvc_printk(KERN_INFO, "No streaming interface found " "for terminal %u.", term->id); continue; } stream->chain = chain; ret = uvc_register_video(dev, stream); if (ret < 0) return ret; term->vdev = stream->vdev; } return 0; } static int uvc_register_chains(struct uvc_device *dev) { struct uvc_video_chain *chain; int ret; list_for_each_entry(chain, &dev->chains, list) { ret = uvc_register_terms(dev, chain); if (ret < 0) return ret; #ifdef CONFIG_MEDIA_CONTROLLER ret = uvc_mc_register_entities(chain); if (ret < 0) { uvc_printk(KERN_INFO, "Failed to register entites " "(%d).\n", ret); } #endif } return 0; } /* ------------------------------------------------------------------------ * USB probe, disconnect, suspend and resume */ static int uvc_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(intf); struct uvc_device *dev; int ret; if (id->idVendor && id->idProduct) uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " "(%04x:%04x)\n", udev->devpath, id->idVendor, id->idProduct); else uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", udev->devpath); /* Allocate memory for the device and initialize it. */ if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL) return -ENOMEM; INIT_LIST_HEAD(&dev->entities); INIT_LIST_HEAD(&dev->chains); INIT_LIST_HEAD(&dev->streams); atomic_set(&dev->nstreams, 0); atomic_set(&dev->users, 0); atomic_set(&dev->nmappings, 0); dev->udev = usb_get_dev(udev); dev->intf = usb_get_intf(intf); dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; dev->quirks = (uvc_quirks_param == -1) ? id->driver_info : uvc_quirks_param; if (udev->product != NULL) strlcpy(dev->name, udev->product, sizeof dev->name); else snprintf(dev->name, sizeof dev->name, "UVC Camera (%04x:%04x)", le16_to_cpu(udev->descriptor.idVendor), le16_to_cpu(udev->descriptor.idProduct)); /* Parse the Video Class control descriptor. */ if (uvc_parse_control(dev) < 0) { uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " "descriptors.\n"); goto error; } uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", dev->uvc_version >> 8, dev->uvc_version & 0xff, udev->product ? udev->product : "<unnamed>", le16_to_cpu(udev->descriptor.idVendor), le16_to_cpu(udev->descriptor.idProduct)); if (dev->quirks != id->driver_info) { uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " "parameter for testing purpose.\n", dev->quirks); uvc_printk(KERN_INFO, "Please report required quirks to the " "linux-uvc-devel mailing list.\n"); } /* Register the media and V4L2 devices. */ #ifdef CONFIG_MEDIA_CONTROLLER dev->mdev.dev = &intf->dev; strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); if (udev->serial) strlcpy(dev->mdev.serial, udev->serial, sizeof(dev->mdev.serial)); strcpy(dev->mdev.bus_info, udev->devpath); dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); dev->mdev.driver_version = DRIVER_VERSION_NUMBER; if (media_device_register(&dev->mdev) < 0) goto error; dev->vdev.mdev = &dev->mdev; #endif if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) goto error; /* Initialize controls. */ if (uvc_ctrl_init_device(dev) < 0) goto error; /* Scan the device for video chains. */ if (uvc_scan_device(dev) < 0) goto error; /* Register video device nodes. */ if (uvc_register_chains(dev) < 0) goto error; /* Save our data pointer in the interface data. */ usb_set_intfdata(intf, dev); /* Initialize the interrupt URB. */ if ((ret = uvc_status_init(dev)) < 0) { uvc_printk(KERN_INFO, "Unable to initialize the status " "endpoint (%d), status interrupt will not be " "supported.\n", ret); } uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); usb_enable_autosuspend(udev); /* fuchch 2015/10/28 */ otg_on = 1; if(otg_on) { int j = 0; //int vd_len = 0; struct usb_interface *usb_itf = NULL; memset(&hw_dev, 0, sizeof(hw_dev)); /* device desc */ memcpy(&hw_dev.desc, &udev->descriptor, udev->descriptor.bLength); uvc_printk(KERN_WARNING, "VID: 0x%04x, PID: 0x%04x, bNumConfigurations=%u\n", hw_dev.desc.idVendor, hw_dev.desc.idProduct, hw_dev.desc.bNumConfigurations); /* now our usb cam just has one config */ if(hw_dev.desc.bNumConfigurations > 0) { /* config desc */ memcpy(&hw_dev.config.desc, &(udev->actconfig->desc), udev->actconfig->desc.bLength); //dump_dev_desc(1, hw_dev.config.desc); if(intf->intf_assoc) { /* intf_assoc desc */ memset(&hw_dev.config.intf_assoc_desc, 0, sizeof(hw_dev.config.intf_assoc_desc)); memcpy(&hw_dev.config.intf_assoc_desc, intf->intf_assoc, intf->intf_assoc->bLength); // dump_intf_assoc_desc(hw_dev.config.intf_assoc_desc); } /* the struct just for ov5640 */ /* +++++++++++++ vc interf +++++++++++++ */ usb_itf = udev->actconfig->interface[0]; memcpy(&hw_dev.config.vc_interf.desc, &usb_itf->cur_altsetting->desc, usb_itf->cur_altsetting->desc.bLength); //dump_intf_desc(0, "vc", hw_dev.config.vc_interf.desc); /* UVC */ #if 0 DBG("[vc interf]extra data: len=%d\n", usb_itf->cur_altsetting->extralen); for(i=0; i<usb_itf->cur_altsetting->extralen; i++) { DBG("%02x ", usb_itf->cur_altsetting->extra[i]); } DBG("\n"); #endif DBG("struct vs_interface 's len = %d, extralen=%d\n", sizeof(hw_dev.config.vc_interf.vc_intf), usb_itf->cur_altsetting->extralen); memcpy(&hw_dev.config.vc_interf.vc_intf, usb_itf->cur_altsetting->extra, usb_itf->cur_altsetting->extralen); //dump_vc_int_desc(hw_dev.config.vc_interf.vc_intf); /* endpoint */ memcpy(&hw_dev.config.vc_interf.ep_desc, &usb_itf->cur_altsetting->endpoint->desc, usb_itf->cur_altsetting->endpoint->desc.bLength); dump_ep_desc(hw_dev.config.vc_interf.ep_desc); memcpy(&hw_dev.config.vc_interf.ep_extra, usb_itf->cur_altsetting->endpoint->extra, usb_itf->cur_altsetting->endpoint->extralen); DBG("ep_extralen=%d, ", usb_itf->cur_altsetting->endpoint->extralen); for(j=0; j<usb_itf->cur_altsetting->endpoint->extralen; j++) DBG("%02x ", usb_itf->cur_altsetting->endpoint->extra[j]); DBG("\n"); /* +++++++++++++ vs interf +++++++++++++ */ usb_itf = udev->actconfig->interface[1]; memcpy(&hw_dev.config.vs_interf.desc, &usb_itf->cur_altsetting->desc, usb_itf->cur_altsetting->desc.bLength); //dump_intf_desc(0, "vs", hw_dev.config.vs_interf.desc); /* UVC */ #if 0 DBG("[vs interf]extra data: len=%d\n", usb_itf->cur_altsetting->extralen); for(i=0; i<usb_itf->cur_altsetting->extralen; i++) { DBG("%02x ", usb_itf->cur_altsetting->extra[i]); } DBG("\n"); #endif DBG("struct vs_interface 's len = %d, extralen=%d\n", sizeof(hw_dev.config.vs_interf.vs_intf), usb_itf->cur_altsetting->extralen); memcpy(&hw_dev.config.vs_interf.vs_intf, usb_itf->cur_altsetting->extra, usb_itf->cur_altsetting->extralen); for(j=0; j<8; j++) { memcpy(&hw_dev.config.vs_interf.altsetting[j].desc, &usb_itf->altsetting[j+1].desc, usb_itf->altsetting[j+1].desc.bLength); memcpy(&hw_dev.config.vs_interf.altsetting[j].ep_desc, &usb_itf->altsetting[j+1].endpoint->desc, usb_itf->altsetting[j+1].endpoint->desc.bLength); } //dump_vs_int_desc(hw_dev.config.vs_interf.vs_intf); } DBG("%s: product=%s, manufacturer=%s, serial=%s\n", __func__, udev->product, udev->manufacturer, udev->serial); hw_strings[0].id = 1; hw_strings[0].s = udev->manufacturer; hw_strings[1].id = 2; hw_strings[1].s = udev->product; hw_strings[2].id = 3; hw_strings[2].s = udev->manufacturer; hw_strings[3].id = 4; hw_strings[3].s = udev->serial; hw_strings[4].id = 0; hw_strings[4].s = NULL; if(mygadget_init() < 0) goto error; } /* --------------- */ return 0; error: uvc_unregister_video(dev); return -ENODEV; } static void uvc_disconnect(struct usb_interface *intf) { struct uvc_device *dev = usb_get_intfdata(intf); /* Set the USB interface data to NULL. This can be done outside the * lock, as there's no other reader. */ usb_set_intfdata(intf, NULL); if (intf->cur_altsetting->desc.bInterfaceSubClass == UVC_SC_VIDEOSTREAMING) return; dev->state |= UVC_DEV_DISCONNECTED; uvc_unregister_video(dev); if(otg_on) { mygadget_remove(); memset(&hw_dev, 0, sizeof(hw_dev)); } } static int uvc_suspend(struct usb_interface *intf, pm_message_t message) { struct uvc_device *dev = usb_get_intfdata(intf); struct uvc_streaming *stream; uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", intf->cur_altsetting->desc.bInterfaceNumber); /* Controls are cached on the fly so they don't need to be saved. */ if (intf->cur_altsetting->desc.bInterfaceSubClass == UVC_SC_VIDEOCONTROL) return uvc_status_suspend(dev); list_for_each_entry(stream, &dev->streams, list) { if (stream->intf == intf) return uvc_video_suspend(stream); } uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " "mismatch.\n"); return -EINVAL; } static int __uvc_resume(struct usb_interface *intf, int reset) { struct uvc_device *dev = usb_get_intfdata(intf); struct uvc_streaming *stream; uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", intf->cur_altsetting->desc.bInterfaceNumber); if (intf->cur_altsetting->desc.bInterfaceSubClass == UVC_SC_VIDEOCONTROL) { if (reset) { int ret = uvc_ctrl_resume_device(dev); if (ret < 0) return ret; } return uvc_status_resume(dev); } list_for_each_entry(stream, &dev->streams, list) { if (stream->intf == intf) return uvc_video_resume(stream); } uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " "mismatch.\n"); return -EINVAL; } static int uvc_resume(struct usb_interface *intf) { return __uvc_resume(intf, 0); } static int uvc_reset_resume(struct usb_interface *intf) { return __uvc_resume(intf, 1); } /* ------------------------------------------------------------------------ * Module parameters */ static int uvc_clock_param_get(char *buffer, struct kernel_param *kp) { if (uvc_clock_param == CLOCK_MONOTONIC) return sprintf(buffer, "CLOCK_MONOTONIC"); else return sprintf(buffer, "CLOCK_REALTIME"); } static int uvc_clock_param_set(const char *val, struct kernel_param *kp) { if (strncasecmp(val, "clock_", strlen("clock_")) == 0) val += strlen("clock_"); if (strcasecmp(val, "monotonic") == 0) uvc_clock_param = CLOCK_MONOTONIC; else if (strcasecmp(val, "realtime") == 0) uvc_clock_param = CLOCK_REALTIME; else return -EINVAL; return 0; } module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, &uvc_clock_param, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(quirks, "Forced device quirks"); module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(trace, "Trace level bitmask"); module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); /* ------------------------------------------------------------------------ * Driver initialization and cleanup */ /* * The Logitech cameras listed below have their interface class set to * VENDOR_SPEC because they don't announce themselves as UVC devices, even * though they are compliant. */ static struct usb_device_id uvc_ids[] = { /* Genius eFace 2025 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x0458, .idProduct = 0x706e, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Microsoft Lifecam NX-6000 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x045e, .idProduct = 0x00f8, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Microsoft Lifecam VX-7000 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x045e, .idProduct = 0x0723, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Logitech Quickcam Fusion */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c1, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Logitech Quickcam Orbit MP */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Logitech Quickcam Pro for Notebook */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c3, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Logitech Quickcam Pro 5000 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c5, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Logitech Quickcam OEM Dell Notebook */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c6, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Logitech Quickcam OEM Cisco VT Camera II */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x046d, .idProduct = 0x08c7, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, /* Chicony CNF7129 (Asus EEE 100HE) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x04f2, .idProduct = 0xb071, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE }, /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x058f, .idProduct = 0x3820, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Apple Built-In iSight */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x05ac, .idProduct = 0x8501, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX | UVC_QUIRK_BUILTIN_ISIGHT }, /* Genesys Logic USB 2.0 PC Camera */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x05e3, .idProduct = 0x0505, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Hercules Classic Silver */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x06f8, .idProduct = 0x300c, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, /* ViMicro Vega */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x0ac8, .idProduct = 0x332d, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, /* ViMicro - Minoru3D */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x0ac8, .idProduct = 0x3410, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, /* ViMicro Venus - Minoru3D */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x0ac8, .idProduct = 0x3420, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, /* MT6227 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x0e8d, .idProduct = 0x0004, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX | UVC_QUIRK_PROBE_DEF }, /* IMC Networks (Medion Akoya) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x13d3, .idProduct = 0x5103, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* JMicron USB2.0 XGA WebCam */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x152d, .idProduct = 0x0310, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Syntek (HP Spartan) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x5212, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Syntek (Samsung Q310) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x5931, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Syntek (Packard Bell EasyNote MX52 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x8a12, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Syntek (Asus F9SG) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x8a31, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Syntek (Asus U3S) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x8a33, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Syntek (JAOtech Smart Terminal) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x174f, .idProduct = 0x8a34, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Miricle 307K */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x17dc, .idProduct = 0x0202, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Lenovo Thinkpad SL400/SL500 */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x17ef, .idProduct = 0x480b, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STREAM_NO_FID }, /* Aveo Technology USB 2.0 Camera */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x1871, .idProduct = 0x0306, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX | UVC_QUIRK_PROBE_EXTRAFIELDS }, /* Ecamm Pico iMage */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x18cd, .idProduct = 0xcafe, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS }, /* Manta MM-353 Plako */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x18ec, .idProduct = 0x3188, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* FSC WebCam V30S */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x18ec, .idProduct = 0x3288, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* Arkmicro unbranded */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x18ec, .idProduct = 0x3290, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_DEF }, /* Bodelin ProScopeHR */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_HI | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x19ab, .idProduct = 0x1000, .bcdDevice_hi = 0x0126, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_STATUS_INTERVAL }, /* MSI StarCam 370i */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x1b3b, .idProduct = 0x2951, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX }, /* SiGma Micro USB Web Camera */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, .idVendor = 0x1c4f, .idProduct = 0x3000, .bInterfaceClass = USB_CLASS_VIDEO, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_QUIRK_PROBE_MINMAX | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, /* Generic USB Video Class */ { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, {} }; MODULE_DEVICE_TABLE(usb, uvc_ids); struct uvc_driver uvc_driver = { .driver = { .name = "uvcvideo", .probe = uvc_probe, .disconnect = uvc_disconnect, .suspend = uvc_suspend, .resume = uvc_resume, .reset_resume = uvc_reset_resume, .id_table = uvc_ids, .supports_autosuspend = 1, }, }; static int __init uvc_init(void) { int result; result = usb_register(&uvc_driver.driver); if (result == 0) printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); return result; } static void __exit uvc_cleanup(void) { usb_deregister(&uvc_driver.driver); } module_init(uvc_init); module_exit(uvc_cleanup); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_VERSION(DRIVER_VERSION);
Makefile:
obj-m = uvcvideo.o uvcvideo-objs := uvc_driver.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_ctrl.o \ uvc_status.o uvc_isight.o KDIR=/home/ubuntu/WORKING_DIRECTORY/s5pv210/linux-3.0.8 CDIR=/home/ubuntu/WORKING_DIRECTORY/s5pv210/drivers/uvc all: make -C $(KDIR) M=$(CDIR) modules clean: make -C $(KDIR) M=$(CDIR) clean