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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /drivers/media/video/gspca/stv06xx/stv06xx.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
download | linux-fsl-qoriq-2ca1a615835d9f4990f42102ab1f2ef434e7e89c.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'drivers/media/video/gspca/stv06xx/stv06xx.c')
-rw-r--r-- | drivers/media/video/gspca/stv06xx/stv06xx.c | 522 |
1 files changed, 522 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/stv06xx/stv06xx.c b/drivers/media/video/gspca/stv06xx/stv06xx.c new file mode 100644 index 0000000..13a021e --- /dev/null +++ b/drivers/media/video/gspca/stv06xx/stv06xx.c @@ -0,0 +1,522 @@ +/* + * 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 "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, "Read 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 (IS_850(sd)) { + struct usb_device *udev = sd->gspca_dev.dev; + __u8 *buf = sd->gspca_dev.usb_buf; + + /* Quickam Web needs an extra packet */ + 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_USBO, "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_USBO, "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_USBO, "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_USBO, "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) { + PDEBUG(D_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_USBO, "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); + } + + 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); + + 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); + if (err < 0) + goto out; + +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, + struct gspca_frame *frame, /* target */ + __u8 *data, /* isoc packet */ + int len) /* iso packet length */ +{ + 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"); + return; + } + + switch (id) { + case 0x0200: + case 0x4200: + PDEBUG(D_PACK, "Frame data packet detected"); + + gspca_frame_add(gspca_dev, INTER_PACKET, frame, + 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, + frame, data, 0); + + 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, frame, data, 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; + default: + PDEBUG(D_PACK, "Unknown chunk %d detected", id); + /* Unknown chunk */ + } + data += chunk_len; + len -= chunk_len; + } +} + +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 +}; + +/* 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; + cam->epaddr = STV_ISOC_ENDPOINT_ADDR; + sd->desc = sd_desc; + gspca_dev->sd_desc = &sd->desc; + + if (dump_bridge) + stv06xx_dump_bridge(sd); + + 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[] = { + {USB_DEVICE(0x046d, 0x0840)}, /* QuickCam Express */ + {USB_DEVICE(0x046d, 0x0850)}, /* LEGO cam / QuickCam Web */ + {USB_DEVICE(0x046d, 0x0870)}, /* Dexxa WebCam USB */ + {} +}; +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) +{ + if (usb_register(&sd_driver) < 0) + return -1; + PDEBUG(D_PROBE, "registered"); + return 0; +} +static void __exit sd_mod_exit(void) +{ + usb_deregister(&sd_driver); + PDEBUG(D_PROBE, "deregistered"); +} + +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"); 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