8715b16ead
Signed-off-by: Patrice CHOTARD <patricechotard@free.fr> Signed-off-by: Jean-François Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
323 lines
8 KiB
C
323 lines
8 KiB
C
/*
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* Jeilinj subdriver
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*
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* Supports some Jeilin dual-mode cameras which use bulk transport and
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* download raw JPEG data.
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*
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* Copyright (C) 2009 Theodore Kilgore
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* Copyright (C) 2011 Patrice Chotard
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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 "jeilinj"
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#include <linux/slab.h>
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#include "gspca.h"
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#include "jpeg.h"
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MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
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MODULE_DESCRIPTION("GSPCA/JEILINJ USB Camera Driver");
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MODULE_LICENSE("GPL");
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/* Default timeouts, in ms */
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#define JEILINJ_CMD_TIMEOUT 500
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#define JEILINJ_DATA_TIMEOUT 1000
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/* Maximum transfer size to use. */
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#define JEILINJ_MAX_TRANSFER 0x200
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#define FRAME_HEADER_LEN 0x10
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#define FRAME_START 0xFFFFFFFF
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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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int blocks_left;
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const struct v4l2_pix_format *cap_mode;
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/* Driver stuff */
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u8 quality; /* image quality */
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u8 jpeg_hdr[JPEG_HDR_SZ];
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};
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struct jlj_command {
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unsigned char instruction[2];
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unsigned char ack_wanted;
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};
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/* AFAICT these cameras will only do 320x240. */
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static struct v4l2_pix_format jlj_mode[] = {
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{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
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.bytesperline = 320,
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.sizeimage = 320 * 240,
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.colorspace = V4L2_COLORSPACE_JPEG,
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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 transfer.
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*/
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/* All commands are two bytes only */
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static void jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command)
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{
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int retval;
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if (gspca_dev->usb_err < 0)
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return;
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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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err("command write [%02x] error %d",
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gspca_dev->usb_buf[0], retval);
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gspca_dev->usb_err = retval;
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}
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}
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/* Responses are one byte only */
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static void jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
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{
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int retval;
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if (gspca_dev->usb_err < 0)
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return;
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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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response = gspca_dev->usb_buf[0];
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if (retval < 0) {
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err("read command [%02x] error %d",
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gspca_dev->usb_buf[0], retval);
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gspca_dev->usb_err = retval;
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}
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}
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static int jlj_start(struct gspca_dev *gspca_dev)
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{
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int i;
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u8 response = 0xff;
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struct sd *sd = (struct sd *) gspca_dev;
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struct jlj_command start_commands[] = {
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{{0x71, 0x81}, 0},
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{{0x70, 0x05}, 0},
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{{0x95, 0x70}, 1},
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{{0x71, 0x81}, 0},
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{{0x70, 0x04}, 0},
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{{0x95, 0x70}, 1},
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{{0x71, 0x00}, 0},
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{{0x70, 0x08}, 0},
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{{0x95, 0x70}, 1},
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{{0x94, 0x02}, 0},
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{{0xde, 0x24}, 0},
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{{0x94, 0x02}, 0},
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{{0xdd, 0xf0}, 0},
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{{0x94, 0x02}, 0},
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{{0xe3, 0x2c}, 0},
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{{0x94, 0x02}, 0},
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{{0xe4, 0x00}, 0},
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{{0x94, 0x02}, 0},
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{{0xe5, 0x00}, 0},
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{{0x94, 0x02}, 0},
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{{0xe6, 0x2c}, 0},
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{{0x94, 0x03}, 0},
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{{0xaa, 0x00}, 0},
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{{0x71, 0x1e}, 0},
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{{0x70, 0x06}, 0},
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{{0x71, 0x80}, 0},
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{{0x70, 0x07}, 0}
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};
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sd->blocks_left = 0;
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for (i = 0; i < ARRAY_SIZE(start_commands); i++) {
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jlj_write2(gspca_dev, start_commands[i].instruction);
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if (start_commands[i].ack_wanted)
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jlj_read1(gspca_dev, response);
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}
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if (gspca_dev->usb_err < 0)
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PDEBUG(D_ERR, "Start streaming command failed");
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return gspca_dev->usb_err;
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}
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static void sd_pkt_scan(struct gspca_dev *gspca_dev,
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u8 *data, int len)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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int packet_type;
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u32 header_marker;
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PDEBUG(D_STREAM, "Got %d bytes out of %d for Block 0",
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len, JEILINJ_MAX_TRANSFER);
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if (len != JEILINJ_MAX_TRANSFER) {
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PDEBUG(D_PACK, "bad length");
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goto discard;
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}
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/* check if it's start of frame */
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header_marker = ((u32 *)data)[0];
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if (header_marker == FRAME_START) {
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sd->blocks_left = data[0x0a] - 1;
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PDEBUG(D_STREAM, "blocks_left = 0x%x", sd->blocks_left);
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/* Start a new frame, and add the JPEG header, first thing */
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gspca_frame_add(gspca_dev, FIRST_PACKET,
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sd->jpeg_hdr, JPEG_HDR_SZ);
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/* Toss line 0 of data block 0, keep the rest. */
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gspca_frame_add(gspca_dev, INTER_PACKET,
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data + FRAME_HEADER_LEN,
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JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
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} else if (sd->blocks_left > 0) {
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PDEBUG(D_STREAM, "%d blocks remaining for frame",
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sd->blocks_left);
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sd->blocks_left -= 1;
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if (sd->blocks_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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data, JEILINJ_MAX_TRANSFER);
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} else
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goto discard;
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return;
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discard:
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/* Discard data until a new frame starts. */
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gspca_dev->last_packet_type = DISCARD_PACKET;
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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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dev->quality = 85;
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PDEBUG(D_PROBE,
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"JEILINJ camera detected"
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" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
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cam->cam_mode = jlj_mode;
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cam->nmodes = 1;
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cam->bulk = 1;
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cam->bulk_nurbs = 1;
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cam->bulk_size = JEILINJ_MAX_TRANSFER;
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return 0;
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}
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static void sd_stopN(struct gspca_dev *gspca_dev)
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{
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int i;
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u8 *buf;
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u8 stop_commands[][2] = {
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{0x71, 0x00},
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{0x70, 0x09},
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{0x71, 0x80},
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{0x70, 0x05}
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};
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for (;;) {
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/* get the image remaining blocks */
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usb_bulk_msg(gspca_dev->dev,
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gspca_dev->urb[0]->pipe,
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gspca_dev->urb[0]->transfer_buffer,
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JEILINJ_MAX_TRANSFER, NULL,
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JEILINJ_DATA_TIMEOUT);
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/* search for 0xff 0xd9 (EOF for JPEG) */
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i = 0;
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buf = gspca_dev->urb[0]->transfer_buffer;
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while ((i < (JEILINJ_MAX_TRANSFER - 1)) &&
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((buf[i] != 0xff) || (buf[i+1] != 0xd9)))
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i++;
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if (i != (JEILINJ_MAX_TRANSFER - 1))
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/* last remaining block found */
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break;
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}
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for (i = 0; i < ARRAY_SIZE(stop_commands); i++)
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jlj_write2(gspca_dev, stop_commands[i]);
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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 gspca_dev->usb_err;
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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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/* create the JPEG header */
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jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
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0x21); /* JPEG 422 */
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jpeg_set_qual(dev->jpeg_hdr, dev->quality);
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PDEBUG(D_STREAM, "Start streaming at 320x240");
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jlj_start(gspca_dev);
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return gspca_dev->usb_err;
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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(0x0979, 0x0280)},
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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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.stopN = sd_stopN,
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.pkt_scan = sd_pkt_scan,
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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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#endif
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};
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/* -- module insert / remove -- */
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static int __init sd_mod_init(void)
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{
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return usb_register(&sd_driver);
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}
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static void __exit sd_mod_exit(void)
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{
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usb_deregister(&sd_driver);
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}
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module_init(sd_mod_init);
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module_exit(sd_mod_exit);
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