540 lines
14 KiB
C
540 lines
14 KiB
C
/*
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* Jeilin JL2005B/C/D library
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*
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* Copyright (C) 2011 Theodore Kilgore <kilgota@auburn.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define MODULE_NAME "jl2005bcd"
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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 <kilgota@auburn.edu>");
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MODULE_DESCRIPTION("JL2005B/C/D USB Camera Driver");
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MODULE_LICENSE("GPL");
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/* Default timeouts, in ms */
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#define JL2005C_CMD_TIMEOUT 500
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#define JL2005C_DATA_TIMEOUT 1000
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/* Maximum transfer size to use. */
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#define JL2005C_MAX_TRANSFER 0x200
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#define FRAME_HEADER_LEN 16
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/* specific webcam descriptor */
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struct sd {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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unsigned char firmware_id[6];
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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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u8 frame_brightness;
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int block_size; /* block size of camera */
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int vga; /* 1 if vga cam, 0 if cif cam */
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};
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/* Camera has two resolution settings. What they are depends on model. */
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static const struct v4l2_pix_format cif_mode[] = {
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{176, 144, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
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.bytesperline = 176,
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.sizeimage = 176 * 144,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0},
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{352, 288, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
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.bytesperline = 352,
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.sizeimage = 352 * 288,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0},
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};
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static const struct v4l2_pix_format vga_mode[] = {
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{320, 240, V4L2_PIX_FMT_JL2005BCD, 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_JL2005BCD, 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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/*
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* cam uses endpoint 0x03 to send commands, 0x84 for read commands,
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* and 0x82 for bulk data transfer.
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*/
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/* All commands are two bytes only */
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static int jl2005c_write2(struct gspca_dev *gspca_dev, unsigned char *command)
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{
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int retval;
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memcpy(gspca_dev->usb_buf, command, 2);
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retval = usb_bulk_msg(gspca_dev->dev,
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usb_sndbulkpipe(gspca_dev->dev, 3),
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gspca_dev->usb_buf, 2, NULL, 500);
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if (retval < 0)
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pr_err("command write [%02x] error %d\n",
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gspca_dev->usb_buf[0], retval);
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return retval;
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}
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/* Response to a command is one byte in usb_buf[0], only if requested. */
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static int jl2005c_read1(struct gspca_dev *gspca_dev)
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{
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int retval;
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retval = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x84),
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gspca_dev->usb_buf, 1, NULL, 500);
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if (retval < 0)
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pr_err("read command [0x%02x] error %d\n",
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gspca_dev->usb_buf[0], retval);
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return retval;
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}
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/* Response appears in gspca_dev->usb_buf[0] */
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static int jl2005c_read_reg(struct gspca_dev *gspca_dev, unsigned char reg)
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{
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int retval;
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static u8 instruction[2] = {0x95, 0x00};
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/* put register to read in byte 1 */
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instruction[1] = reg;
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/* Send the read request */
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retval = jl2005c_write2(gspca_dev, instruction);
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if (retval < 0)
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return retval;
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retval = jl2005c_read1(gspca_dev);
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return retval;
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}
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static int jl2005c_start_new_frame(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval;
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int frame_brightness = 0;
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static u8 instruction[2] = {0x7f, 0x01};
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retval = jl2005c_write2(gspca_dev, instruction);
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if (retval < 0)
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return retval;
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i = 0;
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while (i < 20 && !frame_brightness) {
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/* If we tried 20 times, give up. */
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retval = jl2005c_read_reg(gspca_dev, 0x7e);
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if (retval < 0)
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return retval;
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frame_brightness = gspca_dev->usb_buf[0];
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retval = jl2005c_read_reg(gspca_dev, 0x7d);
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if (retval < 0)
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return retval;
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i++;
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}
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PDEBUG(D_FRAM, "frame_brightness is 0x%02x", gspca_dev->usb_buf[0]);
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return retval;
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}
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static int jl2005c_write_reg(struct gspca_dev *gspca_dev, unsigned char reg,
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unsigned char value)
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{
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int retval;
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u8 instruction[2];
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instruction[0] = reg;
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instruction[1] = value;
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retval = jl2005c_write2(gspca_dev, instruction);
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if (retval < 0)
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return retval;
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return retval;
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}
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static int jl2005c_get_firmware_id(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *)gspca_dev;
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int i = 0;
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int retval = -1;
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unsigned char regs_to_read[] = {0x57, 0x02, 0x03, 0x5d, 0x5e, 0x5f};
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PDEBUG(D_PROBE, "Running jl2005c_get_firmware_id");
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/* Read the first ID byte once for warmup */
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retval = jl2005c_read_reg(gspca_dev, regs_to_read[0]);
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PDEBUG(D_PROBE, "response is %02x", gspca_dev->usb_buf[0]);
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if (retval < 0)
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return retval;
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/* Now actually get the ID string */
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for (i = 0; i < 6; i++) {
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retval = jl2005c_read_reg(gspca_dev, regs_to_read[i]);
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if (retval < 0)
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return retval;
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sd->firmware_id[i] = gspca_dev->usb_buf[0];
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}
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PDEBUG(D_PROBE, "firmware ID is %02x%02x%02x%02x%02x%02x",
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sd->firmware_id[0],
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sd->firmware_id[1],
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sd->firmware_id[2],
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sd->firmware_id[3],
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sd->firmware_id[4],
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sd->firmware_id[5]);
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return 0;
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}
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static int jl2005c_stream_start_vga_lg
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(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval = -1;
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static u8 instruction[][2] = {
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{0x05, 0x00},
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{0x7c, 0x00},
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{0x7d, 0x18},
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{0x02, 0x00},
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{0x01, 0x00},
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{0x04, 0x52},
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};
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for (i = 0; i < ARRAY_SIZE(instruction); i++) {
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msleep(60);
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retval = jl2005c_write2(gspca_dev, instruction[i]);
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if (retval < 0)
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return retval;
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}
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msleep(60);
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return retval;
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}
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static int jl2005c_stream_start_vga_small(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval = -1;
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static u8 instruction[][2] = {
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{0x06, 0x00},
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{0x7c, 0x00},
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{0x7d, 0x1a},
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{0x02, 0x00},
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{0x01, 0x00},
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{0x04, 0x52},
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};
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for (i = 0; i < ARRAY_SIZE(instruction); i++) {
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msleep(60);
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retval = jl2005c_write2(gspca_dev, instruction[i]);
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if (retval < 0)
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return retval;
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}
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msleep(60);
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return retval;
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}
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static int jl2005c_stream_start_cif_lg(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval = -1;
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static u8 instruction[][2] = {
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{0x05, 0x00},
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{0x7c, 0x00},
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{0x7d, 0x30},
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{0x02, 0x00},
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{0x01, 0x00},
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{0x04, 0x42},
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};
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for (i = 0; i < ARRAY_SIZE(instruction); i++) {
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msleep(60);
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retval = jl2005c_write2(gspca_dev, instruction[i]);
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if (retval < 0)
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return retval;
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}
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msleep(60);
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return retval;
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}
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static int jl2005c_stream_start_cif_small(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval = -1;
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static u8 instruction[][2] = {
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{0x06, 0x00},
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{0x7c, 0x00},
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{0x7d, 0x32},
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{0x02, 0x00},
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{0x01, 0x00},
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{0x04, 0x42},
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};
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for (i = 0; i < ARRAY_SIZE(instruction); i++) {
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msleep(60);
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retval = jl2005c_write2(gspca_dev, instruction[i]);
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if (retval < 0)
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return retval;
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}
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msleep(60);
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return retval;
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}
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static int jl2005c_stop(struct gspca_dev *gspca_dev)
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{
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int retval;
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retval = jl2005c_write_reg(gspca_dev, 0x07, 0x00);
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return retval;
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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 jl2005c_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 = 0; /* bytes remaining in current frame. */
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int data_len; /* size to use for the next read. */
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int header_read = 0;
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unsigned char header_sig[2] = {0x4a, 0x4c};
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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(JL2005C_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
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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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/* Check if this is a new frame. If so, start the frame first */
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if (!header_read) {
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mutex_lock(&gspca_dev->usb_lock);
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ret = jl2005c_start_new_frame(gspca_dev);
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mutex_unlock(&gspca_dev->usb_lock);
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if (ret < 0)
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goto quit_stream;
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x82),
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buffer, JL2005C_MAX_TRANSFER, &act_len,
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JL2005C_DATA_TIMEOUT);
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PDEBUG(D_PACK,
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"Got %d bytes out of %d for header",
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act_len, JL2005C_MAX_TRANSFER);
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if (ret < 0 || act_len < JL2005C_MAX_TRANSFER)
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goto quit_stream;
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/* Check whether we actually got the first blodk */
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if (memcmp(header_sig, buffer, 2) != 0) {
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pr_err("First block is not the first block\n");
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goto quit_stream;
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}
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/* total size to fetch is byte 7, times blocksize
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* of which we already got act_len */
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bytes_left = buffer[0x07] * dev->block_size - act_len;
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PDEBUG(D_PACK, "bytes_left = 0x%x", 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, act_len);
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header_read = 1;
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}
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while (bytes_left > 0 && gspca_dev->present) {
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data_len = bytes_left > JL2005C_MAX_TRANSFER ?
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JL2005C_MAX_TRANSFER : bytes_left;
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x82),
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buffer, data_len, &act_len,
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JL2005C_DATA_TIMEOUT);
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if (ret < 0 || act_len < data_len)
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goto quit_stream;
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PDEBUG(D_PACK,
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"Got %d bytes out of %d for frame",
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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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header_read = 0;
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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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jl2005c_stop(gspca_dev);
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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 */
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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;
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struct sd *sd = (struct sd *) gspca_dev;
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cam = &gspca_dev->cam;
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/* We don't use the buffer gspca allocates so make it small. */
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cam->bulk_size = 64;
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cam->bulk = 1;
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/* For the rest, the camera needs to be detected */
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jl2005c_get_firmware_id(gspca_dev);
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/* Here are some known firmware IDs
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* First some JL2005B cameras
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* {0x41, 0x07, 0x04, 0x2c, 0xe8, 0xf2} Sakar KidzCam
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* {0x45, 0x02, 0x08, 0xb9, 0x00, 0xd2} No-name JL2005B
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* JL2005C cameras
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* {0x01, 0x0c, 0x16, 0x10, 0xf8, 0xc8} Argus DC-1512
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* {0x12, 0x04, 0x03, 0xc0, 0x00, 0xd8} ICarly
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* {0x86, 0x08, 0x05, 0x02, 0x00, 0xd4} Jazz
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*
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* Based upon this scanty evidence, we can detect a CIF camera by
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* testing byte 0 for 0x4x.
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*/
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if ((sd->firmware_id[0] & 0xf0) == 0x40) {
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cam->cam_mode = cif_mode;
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cam->nmodes = ARRAY_SIZE(cif_mode);
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sd->block_size = 0x80;
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} else {
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cam->cam_mode = vga_mode;
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cam->nmodes = ARRAY_SIZE(vga_mode);
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sd->block_size = 0x200;
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}
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INIT_WORK(&sd->work_struct, jl2005c_dostream);
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return 0;
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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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return 0;
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}
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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sd->cap_mode = gspca_dev->cam.cam_mode;
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switch (gspca_dev->width) {
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case 640:
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PDEBUG(D_STREAM, "Start streaming at vga resolution");
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jl2005c_stream_start_vga_lg(gspca_dev);
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break;
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case 320:
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PDEBUG(D_STREAM, "Start streaming at qvga resolution");
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jl2005c_stream_start_vga_small(gspca_dev);
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break;
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case 352:
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PDEBUG(D_STREAM, "Start streaming at cif resolution");
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jl2005c_stream_start_cif_lg(gspca_dev);
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break;
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case 176:
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PDEBUG(D_STREAM, "Start streaming at qcif resolution");
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jl2005c_stream_start_cif_small(gspca_dev);
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break;
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default:
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pr_err("Unknown resolution specified\n");
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return -1;
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}
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/* Start the workqueue function to do the streaming */
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sd->work_thread = create_singlethread_workqueue(MODULE_NAME);
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queue_work(sd->work_thread, &sd->work_struct);
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return 0;
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}
|
|
|
|
/* called on streamoff with alt==0 and on disconnect */
|
|
/* the usb_lock is held at entry - restore on exit */
|
|
static void sd_stop0(struct gspca_dev *gspca_dev)
|
|
{
|
|
struct sd *dev = (struct sd *) gspca_dev;
|
|
|
|
/* wait for the work queue to terminate */
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
/* This waits for sq905c_dostream to finish */
|
|
destroy_workqueue(dev->work_thread);
|
|
dev->work_thread = NULL;
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
}
|
|
|
|
|
|
|
|
/* sub-driver description */
|
|
static const struct sd_desc sd_desc = {
|
|
.name = MODULE_NAME,
|
|
.config = sd_config,
|
|
.init = sd_init,
|
|
.start = sd_start,
|
|
.stop0 = sd_stop0,
|
|
};
|
|
|
|
/* -- module initialisation -- */
|
|
static const struct usb_device_id device_table[] = {
|
|
{USB_DEVICE(0x0979, 0x0227)},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, device_table);
|
|
|
|
/* -- device connect -- */
|
|
static int sd_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
|
|
THIS_MODULE);
|
|
}
|
|
|
|
static struct usb_driver sd_driver = {
|
|
.name = MODULE_NAME,
|
|
.id_table = device_table,
|
|
.probe = sd_probe,
|
|
.disconnect = gspca_disconnect,
|
|
#ifdef CONFIG_PM
|
|
.suspend = gspca_suspend,
|
|
.resume = gspca_resume,
|
|
.reset_resume = gspca_resume,
|
|
#endif
|
|
};
|
|
|
|
module_usb_driver(sd_driver);
|