- 根目录:
- drivers
- media
- video
- gspca
- stv06xx
- stv06xx.c
/*
* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
* Copyright (c) 2002, 2003 Tuukka Toivonen
* Copyright (c) 2008 Erik Andrén
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* P/N 861037: Sensor HDCS1000 ASIC STV0600
* P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
* P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
* P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
* P/N 861075-0040: Sensor HDCS1000 ASIC
* P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
* P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/input.h>
#include "stv06xx_sensor.h"
MODULE_AUTHOR("Erik Andrén");
MODULE_DESCRIPTION("STV06XX USB Camera Driver");
MODULE_LICENSE("GPL");
static bool dump_bridge;
static bool dump_sensor;
int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
{
int err;
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
u8 len = (i2c_data > 0xff) ? 2 : 1;
buf[0] = i2c_data & 0xff;
buf[1] = (i2c_data >> 8) & 0xff;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x04, 0x40, address, 0, buf, len,
STV06XX_URB_MSG_TIMEOUT);
PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
i2c_data, address, err);
return (err < 0) ? err : 0;
}
int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
{
int err;
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x04, 0xc0, address, 0, buf, 1,
STV06XX_URB_MSG_TIMEOUT);
*i2c_data = buf[0];
PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
*i2c_data, address, err);
return (err < 0) ? err : 0;
}
/* Wraps the normal write sensor bytes / words functions for writing a
single value */
int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
{
if (sd->sensor->i2c_len == 2) {
u16 data[2] = { address, value };
return stv06xx_write_sensor_words(sd, data, 1);
} else {
u8 data[2] = { address, value };
return stv06xx_write_sensor_bytes(sd, data, 1);
}
}
static int stv06xx_write_sensor_finish(struct sd *sd)
{
int err = 0;
if (sd->bridge == BRIDGE_STV610) {
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
buf[0] = 0;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x04, 0x40, 0x1704, 0, buf, 1,
STV06XX_URB_MSG_TIMEOUT);
}
return (err < 0) ? err : 0;
}
int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
{
int err, i, j;
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
for (i = 0; i < len;) {
/* Build the command buffer */
memset(buf, 0, I2C_BUFFER_LENGTH);
for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
buf[j] = data[2*i];
buf[0x10 + j] = data[2*i+1];
PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
data[2*i+1], data[2*i]);
}
buf[0x20] = sd->sensor->i2c_addr;
buf[0x21] = j - 1; /* Number of commands to send - 1 */
buf[0x22] = I2C_WRITE_CMD;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x04, 0x40, 0x0400, 0, buf,
I2C_BUFFER_LENGTH,
STV06XX_URB_MSG_TIMEOUT);
if (err < 0)
return err;
}
return stv06xx_write_sensor_finish(sd);
}
int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
{
int err, i, j;
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
for (i = 0; i < len;) {
/* Build the command buffer */
memset(buf, 0, I2C_BUFFER_LENGTH);
for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
buf[j] = data[2*i];
buf[0x10 + j * 2] = data[2*i+1];
buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
data[2*i+1], data[2*i]);
}
buf[0x20] = sd->sensor->i2c_addr;
buf[0x21] = j - 1; /* Number of commands to send - 1 */
buf[0x22] = I2C_WRITE_CMD;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x04, 0x40, 0x0400, 0, buf,
I2C_BUFFER_LENGTH,
STV06XX_URB_MSG_TIMEOUT);
if (err < 0)
return err;
}
return stv06xx_write_sensor_finish(sd);
}
int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
{
int err;
struct usb_device *udev = sd->gspca_dev.dev;
__u8 *buf = sd->gspca_dev.usb_buf;
err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
if (err < 0)
return err;
/* Clear mem */
memset(buf, 0, I2C_BUFFER_LENGTH);
buf[0] = address;
buf[0x20] = sd->sensor->i2c_addr;
buf[0x21] = 0;
/* Read I2C register */
buf[0x22] = I2C_READ_CMD;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
STV06XX_URB_MSG_TIMEOUT);
if (err < 0) {
pr_err("I2C: Read error writing address: %d\n", err);
return err;
}
err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
STV06XX_URB_MSG_TIMEOUT);
if (sd->sensor->i2c_len == 2)
*value = buf[0] | (buf[1] << 8);
else
*value = buf[0];
PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
*value, address, err);
return (err < 0) ? err : 0;
}
/* Dumps all bridge registers */
static void stv06xx_dump_bridge(struct sd *sd)
{
int i;
u8 data, buf;
pr_info("Dumping all stv06xx bridge registers\n");
for (i = 0x1400; i < 0x160f; i++) {
stv06xx_read_bridge(sd, i, &data);
pr_info("Read 0x%x from address 0x%x\n", data, i);
}
pr_info("Testing stv06xx bridge registers for writability\n");
for (i = 0x1400; i < 0x160f; i++) {
stv06xx_read_bridge(sd, i, &data);
buf = data;
stv06xx_write_bridge(sd, i, 0xff);
stv06xx_read_bridge(sd, i, &data);
if (data == 0xff)
pr_info("Register 0x%x is read/write\n", i);
else if (data != buf)
pr_info("Register 0x%x is read/write, but only partially\n",
i);
else
pr_info("Register 0x%x is read-only\n", i);
stv06xx_write_bridge(sd, i, buf);
}
}
/* this function is called at probe and resume time */
static int stv06xx_init(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int err;
PDEBUG(D_PROBE, "Initializing camera");
/* Let the usb init settle for a bit
before performing the initialization */
msleep(250);
err = sd->sensor->init(sd);
if (dump_sensor && sd->sensor->dump)
sd->sensor->dump(sd);
return (err < 0) ? err : 0;
}
/* Start the camera */
static int stv06xx_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
struct usb_host_interface *alt;
struct usb_interface *intf;
int err, packet_size;
intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
if (!alt) {
PDEBUG(D_ERR, "Couldn't get altsetting");
return -EIO;
}
packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
if (err < 0)
return err;
/* Prepare the sensor for start */
err = sd->sensor->start(sd);
if (err < 0)
goto out;
/* Start isochronous streaming */
err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
out:
if (err < 0)
PDEBUG(D_STREAM, "Starting stream failed");
else
PDEBUG(D_STREAM, "Started streaming");
return (err < 0) ? err : 0;
}
static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
{
struct usb_host_interface *alt;
struct sd *sd = (struct sd *) gspca_dev;
/* Start isoc bandwidth "negotiation" at max isoc bandwidth */
alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
alt->endpoint[0].desc.wMaxPacketSize =
cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
return 0;
}
static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
{
int ret, packet_size, min_packet_size;
struct usb_host_interface *alt;
struct sd *sd = (struct sd *) gspca_dev;
alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
if (packet_size <= min_packet_size)
return -EIO;
packet_size -= 100;
if (packet_size < min_packet_size)
packet_size = min_packet_size;
alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
if (ret < 0)
PDEBUG(D_ERR|D_STREAM, "set alt 1 err %d", ret);
return ret;
}
static void stv06xx_stopN(struct gspca_dev *gspca_dev)
{
int err;
struct sd *sd = (struct sd *) gspca_dev;
/* stop ISO-streaming */
err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
if (err < 0)
goto out;
err = sd->sensor->stop(sd);
out:
if (err < 0)
PDEBUG(D_STREAM, "Failed to stop stream");
else
PDEBUG(D_STREAM, "Stopped streaming");
}
/*
* Analyse an USB packet of the data stream and store it appropriately.
* Each packet contains an integral number of chunks. Each chunk has
* 2-bytes identification, followed by 2-bytes that describe the chunk
* length. Known/guessed chunk identifications are:
* 8001/8005/C001/C005 - Begin new frame
* 8002/8006/C002/C006 - End frame
* 0200/4200 - Contains actual image data, bayer or compressed
* 0005 - 11 bytes of unknown data
* 0100 - 2 bytes of unknown data
* The 0005 and 0100 chunks seem to appear only in compressed stream.
*/
static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* isoc packet */
int len) /* iso packet length */
{
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_PACK, "Packet of length %d arrived", len);
/* A packet may contain several frames
loop until the whole packet is reached */
while (len) {
int id, chunk_len;
if (len < 4) {
PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
return;
}
/* Capture the id */
id = (data[0] << 8) | data[1];
/* Capture the chunk length */
chunk_len = (data[2] << 8) | data[3];
PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
data += 4;
len -= 4;
if (len < chunk_len) {
PDEBUG(D_ERR, "URB packet length is smaller"
" than the specified chunk length");
gspca_dev->last_packet_type = DISCARD_PACKET;
return;
}
/* First byte seem to be 02=data 2nd byte is unknown??? */
if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
goto frame_data;
switch (id) {
case 0x0200:
case 0x4200:
frame_data:
PDEBUG(D_PACK, "Frame data packet detected");
if (sd->to_skip) {
int skip = (sd->to_skip < chunk_len) ?
sd->to_skip : chunk_len;
data += skip;
len -= skip;
chunk_len -= skip;
sd->to_skip -= skip;
}
gspca_frame_add(gspca_dev, INTER_PACKET,
data, chunk_len);
break;
case 0x8001:
case 0x8005:
case 0xc001:
case 0xc005:
PDEBUG(D_PACK, "Starting new frame");
/* Create a new frame, chunk length should be zero */
gspca_frame_add(gspca_dev, FIRST_PACKET,
NULL, 0);
if (sd->bridge == BRIDGE_ST6422)
sd->to_skip = gspca_dev->width * 4;
if (chunk_len)
PDEBUG(D_ERR, "Chunk length is "
"non-zero on a SOF");
break;
case 0x8002:
case 0x8006:
case 0xc002:
PDEBUG(D_PACK, "End of frame detected");
/* Complete the last frame (if any) */
gspca_frame_add(gspca_dev, LAST_PACKET,
NULL, 0);
if (chunk_len)
PDEBUG(D_ERR, "Chunk length is "
"non-zero on a EOF");
break;
case 0x0005:
PDEBUG(D_PACK, "Chunk 0x005 detected");
/* Unknown chunk with 11 bytes of data,
occurs just before end of each frame
in compressed mode */
break;
case 0x0100:
PDEBUG(D_PACK, "Chunk 0x0100 detected");
/* Unknown chunk with 2 bytes of data,
occurs 2-3 times per USB interrupt */
break;
case 0x42ff:
PDEBUG(D_PACK, "Chunk 0x42ff detected");
/* Special chunk seen sometimes on the ST6422 */
break;
default:
PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
/* Unknown chunk */
}
data += chunk_len;
len -= chunk_len;
}
}
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* interrupt packet data */
int len) /* interrupt packet length */
{
int ret = -EINVAL;
if (len == 1 && data[0] == 0x80) {
input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
input_sync(gspca_dev->input_dev);
ret = 0;
}
if (len == 1 && data[0] == 0x88) {
input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
input_sync(gspca_dev->input_dev);
ret = 0;
}
return ret;
}
#endif
static int stv06xx_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id);
/* sub-driver description */
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
.config = stv06xx_config,
.init = stv06xx_init,
.start = stv06xx_start,
.stopN = stv06xx_stopN,
.pkt_scan = stv06xx_pkt_scan,
.isoc_init = stv06xx_isoc_init,
.isoc_nego = stv06xx_isoc_nego,
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
.int_pkt_scan = sd_int_pkt_scan,
#endif
};
/* This function is called at probe time */
static int stv06xx_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_PROBE, "Configuring camera");
sd->desc = sd_desc;
sd->bridge = id->driver_info;
gspca_dev->sd_desc = &sd->desc;
if (dump_bridge)
stv06xx_dump_bridge(sd);
sd->sensor = &stv06xx_sensor_st6422;
if (!sd->sensor->probe(sd))
return 0;
sd->sensor = &stv06xx_sensor_vv6410;
if (!sd->sensor->probe(sd))
return 0;
sd->sensor = &stv06xx_sensor_hdcs1x00;
if (!sd->sensor->probe(sd))
return 0;
sd->sensor = &stv06xx_sensor_hdcs1020;
if (!sd->sensor->probe(sd))
return 0;
sd->sensor = &stv06xx_sensor_pb0100;
if (!sd->sensor->probe(sd))
return 0;
sd->sensor = NULL;
return -ENODEV;
}
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
/* QuickCam Express */
{USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
/* LEGO cam / QuickCam Web */
{USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
/* Dexxa WebCam USB */
{USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
/* QuickCam Messenger */
{USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
/* QuickCam Communicate */
{USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
/* QuickCam Messenger (new) */
{USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
PDEBUG(D_PROBE, "Probing for a stv06xx device");
return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
THIS_MODULE);
}
static void sd_disconnect(struct usb_interface *intf)
{
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
if (sd->sensor->disconnect)
sd->sensor->disconnect(sd);
gspca_disconnect(intf);
}
static struct usb_driver sd_driver = {
.name = MODULE_NAME,
.id_table = device_table,
.probe = sd_probe,
.disconnect = sd_disconnect,
#ifdef CONFIG_PM
.suspend = gspca_suspend,
.resume = gspca_resume,
#endif
};
module_usb_driver(sd_driver);
module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");