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330 lines
9.1 KiB
330 lines
9.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SQ905C subdriver |
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* |
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* Copyright (C) 2009 Theodore Kilgore |
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*/ |
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/* |
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* |
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* This driver uses work done in |
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* libgphoto2/camlibs/digigr8, Copyright (C) Theodore Kilgore. |
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* |
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* This driver has also used as a base the sq905c driver |
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* and may contain code fragments from it. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#define MODULE_NAME "sq905c" |
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#include <linux/workqueue.h> |
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#include <linux/slab.h> |
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#include "gspca.h" |
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MODULE_AUTHOR("Theodore Kilgore <[email protected]>"); |
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MODULE_DESCRIPTION("GSPCA/SQ905C USB Camera Driver"); |
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MODULE_LICENSE("GPL"); |
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/* Default timeouts, in ms */ |
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#define SQ905C_CMD_TIMEOUT 500 |
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#define SQ905C_DATA_TIMEOUT 1000 |
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/* Maximum transfer size to use. */ |
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#define SQ905C_MAX_TRANSFER 0x8000 |
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#define FRAME_HEADER_LEN 0x50 |
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/* Commands. These go in the "value" slot. */ |
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#define SQ905C_CLEAR 0xa0 /* clear everything */ |
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#define SQ905C_GET_ID 0x14f4 /* Read version number */ |
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#define SQ905C_CAPTURE_LOW 0xa040 /* Starts capture at 160x120 */ |
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#define SQ905C_CAPTURE_MED 0x1440 /* Starts capture at 320x240 */ |
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#define SQ905C_CAPTURE_HI 0x2840 /* Starts capture at 320x240 */ |
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/* For capture, this must go in the "index" slot. */ |
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#define SQ905C_CAPTURE_INDEX 0x110f |
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/* Structure to hold all of our device specific stuff */ |
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struct sd { |
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struct gspca_dev gspca_dev; /* !! must be the first item */ |
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const struct v4l2_pix_format *cap_mode; |
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/* Driver stuff */ |
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struct work_struct work_struct; |
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struct workqueue_struct *work_thread; |
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}; |
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/* |
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* Most of these cameras will do 640x480 and 320x240. 160x120 works |
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* in theory but gives very poor output. Therefore, not supported. |
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* The 0x2770:0x9050 cameras have max resolution of 320x240. |
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*/ |
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static struct v4l2_pix_format sq905c_mode[] = { |
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{ 320, 240, V4L2_PIX_FMT_SQ905C, V4L2_FIELD_NONE, |
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.bytesperline = 320, |
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.sizeimage = 320 * 240, |
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.colorspace = V4L2_COLORSPACE_SRGB, |
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.priv = 0}, |
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{ 640, 480, V4L2_PIX_FMT_SQ905C, V4L2_FIELD_NONE, |
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.bytesperline = 640, |
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.sizeimage = 640 * 480, |
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.colorspace = V4L2_COLORSPACE_SRGB, |
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.priv = 0} |
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}; |
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/* Send a command to the camera. */ |
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static int sq905c_command(struct gspca_dev *gspca_dev, u16 command, u16 index) |
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{ |
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int ret; |
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ret = usb_control_msg(gspca_dev->dev, |
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usb_sndctrlpipe(gspca_dev->dev, 0), |
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USB_REQ_SYNCH_FRAME, /* request */ |
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
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command, index, NULL, 0, |
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SQ905C_CMD_TIMEOUT); |
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if (ret < 0) { |
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pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); |
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return ret; |
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} |
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return 0; |
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} |
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static int sq905c_read(struct gspca_dev *gspca_dev, u16 command, u16 index, |
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int size) |
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{ |
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int ret; |
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ret = usb_control_msg(gspca_dev->dev, |
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usb_rcvctrlpipe(gspca_dev->dev, 0), |
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USB_REQ_SYNCH_FRAME, /* request */ |
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
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command, index, gspca_dev->usb_buf, size, |
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SQ905C_CMD_TIMEOUT); |
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if (ret < 0) { |
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pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); |
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return ret; |
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} |
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return 0; |
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} |
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/* |
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* This function is called as a workqueue function and runs whenever the camera |
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* is streaming data. Because it is a workqueue function it is allowed to sleep |
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* so we can use synchronous USB calls. To avoid possible collisions with other |
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* threads attempting to use gspca_dev->usb_buf we take the usb_lock when |
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* performing USB operations using it. In practice we don't really need this |
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* as the camera doesn't provide any controls. |
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*/ |
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static void sq905c_dostream(struct work_struct *work) |
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{ |
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struct sd *dev = container_of(work, struct sd, work_struct); |
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struct gspca_dev *gspca_dev = &dev->gspca_dev; |
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int bytes_left; /* bytes remaining in current frame. */ |
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int data_len; /* size to use for the next read. */ |
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int act_len; |
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int packet_type; |
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int ret; |
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u8 *buffer; |
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buffer = kmalloc(SQ905C_MAX_TRANSFER, GFP_KERNEL); |
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if (!buffer) { |
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pr_err("Couldn't allocate USB buffer\n"); |
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goto quit_stream; |
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} |
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while (gspca_dev->present && gspca_dev->streaming) { |
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#ifdef CONFIG_PM |
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if (gspca_dev->frozen) |
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break; |
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#endif |
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/* Request the header, which tells the size to download */ |
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ret = usb_bulk_msg(gspca_dev->dev, |
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usb_rcvbulkpipe(gspca_dev->dev, 0x81), |
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buffer, FRAME_HEADER_LEN, &act_len, |
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SQ905C_DATA_TIMEOUT); |
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gspca_dbg(gspca_dev, D_STREAM, |
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"Got %d bytes out of %d for header\n", |
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act_len, FRAME_HEADER_LEN); |
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if (ret < 0 || act_len < FRAME_HEADER_LEN) |
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goto quit_stream; |
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/* size is read from 4 bytes starting 0x40, little endian */ |
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bytes_left = buffer[0x40]|(buffer[0x41]<<8)|(buffer[0x42]<<16) |
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|(buffer[0x43]<<24); |
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gspca_dbg(gspca_dev, D_STREAM, "bytes_left = 0x%x\n", |
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bytes_left); |
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/* We keep the header. It has other information, too. */ |
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packet_type = FIRST_PACKET; |
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gspca_frame_add(gspca_dev, packet_type, |
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buffer, FRAME_HEADER_LEN); |
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while (bytes_left > 0 && gspca_dev->present) { |
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data_len = bytes_left > SQ905C_MAX_TRANSFER ? |
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SQ905C_MAX_TRANSFER : bytes_left; |
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ret = usb_bulk_msg(gspca_dev->dev, |
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usb_rcvbulkpipe(gspca_dev->dev, 0x81), |
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buffer, data_len, &act_len, |
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SQ905C_DATA_TIMEOUT); |
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if (ret < 0 || act_len < data_len) |
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goto quit_stream; |
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gspca_dbg(gspca_dev, D_STREAM, |
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"Got %d bytes out of %d for frame\n", |
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data_len, bytes_left); |
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bytes_left -= data_len; |
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if (bytes_left == 0) |
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packet_type = LAST_PACKET; |
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else |
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packet_type = INTER_PACKET; |
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gspca_frame_add(gspca_dev, packet_type, |
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buffer, data_len); |
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} |
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} |
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quit_stream: |
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if (gspca_dev->present) { |
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mutex_lock(&gspca_dev->usb_lock); |
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sq905c_command(gspca_dev, SQ905C_CLEAR, 0); |
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mutex_unlock(&gspca_dev->usb_lock); |
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} |
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kfree(buffer); |
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} |
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/* This function is called at probe time just before sd_init */ |
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static int sd_config(struct gspca_dev *gspca_dev, |
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const struct usb_device_id *id) |
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{ |
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struct cam *cam = &gspca_dev->cam; |
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struct sd *dev = (struct sd *) gspca_dev; |
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int ret; |
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gspca_dbg(gspca_dev, D_PROBE, |
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"SQ9050 camera detected (vid/pid 0x%04X:0x%04X)\n", |
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id->idVendor, id->idProduct); |
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ret = sq905c_command(gspca_dev, SQ905C_GET_ID, 0); |
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if (ret < 0) { |
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gspca_err(gspca_dev, "Get version command failed\n"); |
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return ret; |
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} |
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ret = sq905c_read(gspca_dev, 0xf5, 0, 20); |
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if (ret < 0) { |
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gspca_err(gspca_dev, "Reading version command failed\n"); |
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return ret; |
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} |
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/* Note we leave out the usb id and the manufacturing date */ |
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gspca_dbg(gspca_dev, D_PROBE, |
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"SQ9050 ID string: %02x - %*ph\n", |
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gspca_dev->usb_buf[3], 6, gspca_dev->usb_buf + 14); |
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cam->cam_mode = sq905c_mode; |
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cam->nmodes = 2; |
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if (gspca_dev->usb_buf[15] == 0) |
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cam->nmodes = 1; |
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/* We don't use the buffer gspca allocates so make it small. */ |
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cam->bulk_size = 32; |
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cam->bulk = 1; |
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INIT_WORK(&dev->work_struct, sq905c_dostream); |
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return 0; |
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} |
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/* called on streamoff with alt==0 and on disconnect */ |
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/* the usb_lock is held at entry - restore on exit */ |
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static void sd_stop0(struct gspca_dev *gspca_dev) |
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{ |
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struct sd *dev = (struct sd *) gspca_dev; |
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/* wait for the work queue to terminate */ |
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mutex_unlock(&gspca_dev->usb_lock); |
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/* This waits for sq905c_dostream to finish */ |
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destroy_workqueue(dev->work_thread); |
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dev->work_thread = NULL; |
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mutex_lock(&gspca_dev->usb_lock); |
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} |
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/* this function is called at probe and resume time */ |
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static int sd_init(struct gspca_dev *gspca_dev) |
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{ |
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/* connect to the camera and reset it. */ |
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return sq905c_command(gspca_dev, SQ905C_CLEAR, 0); |
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} |
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/* Set up for getting frames. */ |
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static int sd_start(struct gspca_dev *gspca_dev) |
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{ |
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struct sd *dev = (struct sd *) gspca_dev; |
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int ret; |
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dev->cap_mode = gspca_dev->cam.cam_mode; |
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/* "Open the shutter" and set size, to start capture */ |
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switch (gspca_dev->pixfmt.width) { |
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case 640: |
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gspca_dbg(gspca_dev, D_STREAM, "Start streaming at high resolution\n"); |
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dev->cap_mode++; |
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ret = sq905c_command(gspca_dev, SQ905C_CAPTURE_HI, |
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SQ905C_CAPTURE_INDEX); |
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break; |
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default: /* 320 */ |
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gspca_dbg(gspca_dev, D_STREAM, "Start streaming at medium resolution\n"); |
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ret = sq905c_command(gspca_dev, SQ905C_CAPTURE_MED, |
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SQ905C_CAPTURE_INDEX); |
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} |
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if (ret < 0) { |
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gspca_err(gspca_dev, "Start streaming command failed\n"); |
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return ret; |
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} |
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/* Start the workqueue function to do the streaming */ |
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dev->work_thread = create_singlethread_workqueue(MODULE_NAME); |
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if (!dev->work_thread) |
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return -ENOMEM; |
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queue_work(dev->work_thread, &dev->work_struct); |
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return 0; |
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} |
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/* Table of supported USB devices */ |
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static const struct usb_device_id device_table[] = { |
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{USB_DEVICE(0x2770, 0x905c)}, |
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{USB_DEVICE(0x2770, 0x9050)}, |
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{USB_DEVICE(0x2770, 0x9051)}, |
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{USB_DEVICE(0x2770, 0x9052)}, |
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{USB_DEVICE(0x2770, 0x913d)}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(usb, device_table); |
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/* sub-driver description */ |
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static const struct sd_desc sd_desc = { |
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.name = MODULE_NAME, |
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.config = sd_config, |
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.init = sd_init, |
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.start = sd_start, |
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.stop0 = sd_stop0, |
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}; |
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/* -- device connect -- */ |
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static int sd_probe(struct usb_interface *intf, |
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const struct usb_device_id *id) |
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{ |
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return gspca_dev_probe(intf, id, |
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&sd_desc, |
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sizeof(struct sd), |
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THIS_MODULE); |
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} |
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static struct usb_driver sd_driver = { |
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.name = MODULE_NAME, |
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.id_table = device_table, |
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.probe = sd_probe, |
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.disconnect = gspca_disconnect, |
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#ifdef CONFIG_PM |
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.suspend = gspca_suspend, |
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.resume = gspca_resume, |
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.reset_resume = gspca_resume, |
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#endif |
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}; |
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module_usb_driver(sd_driver);
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