| /* |
| * 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 |
| */ |
| |
| #include <linux/input.h> |
| #include "stv06xx_sensor.h" |
| |
| MODULE_AUTHOR("Erik Andrén"); |
| MODULE_DESCRIPTION("STV06XX USB Camera Driver"); |
| MODULE_LICENSE("GPL"); |
| |
| static int dump_bridge; |
| static int 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) { |
| err("I2C: Read error writing address: %d", 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; |
| |
| info("Dumping all stv06xx bridge registers"); |
| for (i = 0x1400; i < 0x160f; i++) { |
| stv06xx_read_bridge(sd, i, &data); |
| |
| info("Read 0x%x from address 0x%x", data, i); |
| } |
| |
| info("Testing stv06xx bridge registers for writability"); |
| 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) |
| info("Register 0x%x is read/write", i); |
| else if (data != buf) |
| info("Register 0x%x is read/write," |
| " but only partially", i); |
| else |
| info("Register 0x%x is read-only", 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; |
| int 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 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, |
| #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; |
| struct cam *cam; |
| |
| PDEBUG(D_PROBE, "Configuring camera"); |
| |
| cam = &gspca_dev->cam; |
| 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 __devinitdata 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 insert / remove -- */ |
| static int __init sd_mod_init(void) |
| { |
| return usb_register(&sd_driver); |
| } |
| static void __exit sd_mod_exit(void) |
| { |
| usb_deregister(&sd_driver); |
| } |
| |
| module_init(sd_mod_init); |
| module_exit(sd_mod_exit); |
| |
| 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"); |