/* * Pixart PAC207BCA library * * Copyright (C) 2008 Hans de Goede * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr * * V4L2 by Jean-Francois Moine * * 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 * */ #define MODULE_NAME "pac207" #include "gspca.h" #define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 30) static const char version[] = "0.0.30"; MODULE_AUTHOR("Hans de Goede "); MODULE_DESCRIPTION("Pixart PAC207"); MODULE_LICENSE("GPL"); #define PAC207_CTRL_TIMEOUT 100 /* ms */ #define PAC207_BRIGHTNESS_MIN 0 #define PAC207_BRIGHTNESS_MAX 255 #define PAC207_BRIGHTNESS_DEFAULT 4 /* power on default: 4 */ #define PAC207_EXPOSURE_MIN 4 #define PAC207_EXPOSURE_MAX 26 #define PAC207_EXPOSURE_DEFAULT 4 /* power on default: 3 ?? */ #define PAC207_EXPOSURE_KNEE 11 /* 4 = 30 fps, 11 = 8, 15 = 6 */ #define PAC207_GAIN_MIN 0 #define PAC207_GAIN_MAX 31 #define PAC207_GAIN_DEFAULT 9 /* power on default: 9 */ #define PAC207_GAIN_KNEE 20 #define PAC207_AUTOGAIN_DEADZONE 30 /* We calculating the autogain at the end of the transfer of a frame, at this moment a frame with the old settings is being transmitted, and a frame is being captured with the old settings. So if we adjust the autogain we must ignore atleast the 2 next frames for the new settings to come into effect before doing any other adjustments */ #define PAC207_AUTOGAIN_IGNORE_FRAMES 3 enum pac207_line_state { LINE_HEADER1, LINE_HEADER2, LINE_UNCOMPRESSED, LINE_COMPRESSED, }; struct pac207_decoder_state { /* generic state */ u16 line_read; u16 line_marker; u8 line_state; u8 header_read; /* compression state */ u16 processed_bytes; u8 remaining_bits; s8 no_remaining_bits; u8 get_abs; u8 discard_byte; u8 line_decode_buf[352]; }; /* specific webcam descriptor */ struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ struct pac207_decoder_state decoder_state; u8 mode; u8 brightness; u8 exposure; u8 autogain; u8 gain; u8 sof_read; u8 autogain_ignore_frames; atomic_t avg_lum; }; /* V4L2 controls supported by the driver */ static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val); static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val); static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val); static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val); static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val); static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val); static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val); static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val); static struct ctrl sd_ctrls[] = { #define SD_BRIGHTNESS 0 { { .id = V4L2_CID_BRIGHTNESS, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Brightness", .minimum = PAC207_BRIGHTNESS_MIN, .maximum = PAC207_BRIGHTNESS_MAX, .step = 1, .default_value = PAC207_BRIGHTNESS_DEFAULT, .flags = 0, }, .set = sd_setbrightness, .get = sd_getbrightness, }, #define SD_EXPOSURE 1 { { .id = V4L2_CID_EXPOSURE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "exposure", .minimum = PAC207_EXPOSURE_MIN, .maximum = PAC207_EXPOSURE_MAX, .step = 1, .default_value = PAC207_EXPOSURE_DEFAULT, .flags = 0, }, .set = sd_setexposure, .get = sd_getexposure, }, #define SD_AUTOGAIN 2 { { .id = V4L2_CID_AUTOGAIN, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Auto Gain", .minimum = 0, .maximum = 1, .step = 1, .default_value = 1, .flags = 0, }, .set = sd_setautogain, .get = sd_getautogain, }, #define SD_GAIN 3 { { .id = V4L2_CID_GAIN, .type = V4L2_CTRL_TYPE_INTEGER, .name = "gain", .minimum = PAC207_GAIN_MIN, .maximum = PAC207_GAIN_MAX, .step = 1, .default_value = PAC207_GAIN_DEFAULT, .flags = 0, }, .set = sd_setgain, .get = sd_getgain, }, }; static struct cam_mode sif_mode[] = { {V4L2_PIX_FMT_SBGGR8, 176, 144, 1}, {V4L2_PIX_FMT_SBGGR8, 352, 288, 0}, }; static const __u8 pac207_sensor_init[][8] = { {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0xf0}, {0x00, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00}, {0x00, 0x00, 0x32, 0x00, 0x96, 0x00, 0xa2, 0x02}, {0x32, 0x00, 0x96, 0x00, 0xA2, 0x02, 0xaf, 0x00}, }; /* 48 reg_72 Rate Control end BalSize_4a =0x36 */ static const __u8 PacReg72[] = { 0x00, 0x00, 0x36, 0x00 }; static const char pac207_sof_marker[5] = { 0xff, 0xff, 0x00, 0xff, 0x96 }; int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, const u8 *buffer, u16 length) { struct usb_device *udev = gspca_dev->dev; int err; u8 kbuf[8]; memcpy(kbuf, buffer, length); err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, 0x00, index, kbuf, length, PAC207_CTRL_TIMEOUT); if (err < 0) PDEBUG(D_ERR, "Failed to write registers to index 0x%04X, error %d)", index, err); return err; } int pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value) { struct usb_device *udev = gspca_dev->dev; int err; err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, value, index, NULL, 0, PAC207_CTRL_TIMEOUT); if (err) PDEBUG(D_ERR, "Failed to write a register (index 0x%04X," " value 0x%02X, error %d)", index, value, err); return err; } int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) { struct usb_device *udev = gspca_dev->dev; u8 buff; int res; res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, 0x00, index, &buff, 1, PAC207_CTRL_TIMEOUT); if (res < 0) { PDEBUG(D_ERR, "Failed to read a register (index 0x%04X, error %d)", index, res); return res; } return buff; } /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { struct cam *cam; u8 idreg[2]; idreg[0] = pac207_read_reg(gspca_dev, 0x0000); idreg[1] = pac207_read_reg(gspca_dev, 0x0001); idreg[0] = ((idreg[0] & 0x0F) << 4) | ((idreg[1] & 0xf0) >> 4); idreg[1] = idreg[1] & 0x0f; PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X", idreg[0], idreg[1]); if (idreg[0] != 0x27) { PDEBUG(D_PROBE, "Error invalid sensor ID!"); return -ENODEV; } pac207_write_reg(gspca_dev, 0x41, 0x00); /* Bit_0=Image Format, * Bit_1=LED, * Bit_2=Compression test mode enable */ pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ pac207_write_reg(gspca_dev, 0x11, 0x30); /* Analog Bias */ PDEBUG(D_PROBE, "Pixart PAC207BCA Image Processor and Control Chip detected" " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct); cam = &gspca_dev->cam; cam->dev_name = (char *) id->driver_info; cam->epaddr = 0x05; cam->cam_mode = sif_mode; cam->nmodes = ARRAY_SIZE(sif_mode); return 0; } /* this function is called at open time */ static int sd_open(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; sd->brightness = PAC207_BRIGHTNESS_DEFAULT; sd->exposure = PAC207_EXPOSURE_DEFAULT; sd->gain = PAC207_GAIN_DEFAULT; sd->autogain = 1; return 0; } /* -- start the camera -- */ static void sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; __u8 mode; pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */ pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8); pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8); pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8); pac207_write_regs(gspca_dev, 0x0040, pac207_sensor_init[3], 8); pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[4], 8); pac207_write_regs(gspca_dev, 0x0048, PacReg72, 4); /* Compression Balance */ if (gspca_dev->width == 176) pac207_write_reg(gspca_dev, 0x4a, 0xff); else pac207_write_reg(gspca_dev, 0x4a, 0x88); pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */ pac207_write_reg(gspca_dev, 0x08, sd->brightness); /* PGA global gain (Bit 4-0) */ pac207_write_reg(gspca_dev, 0x0e, sd->gain); pac207_write_reg(gspca_dev, 0x02, sd->exposure); /* PXCK = 12MHz /n */ mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */ if (gspca_dev->width == 176) { /* 176x144 */ mode |= 0x01; PDEBUG(D_STREAM, "pac207_start mode 176x144"); } else/* 352x288 */ PDEBUG(D_STREAM, "pac207_start mode 352x288"); pac207_write_reg(gspca_dev, 0x41, mode); pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ udelay(1000); /* taken from gspca */ pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */ sd->sof_read = 0; sd->autogain_ignore_frames = 0; atomic_set(&sd->avg_lum, -1); } static void sd_stopN(struct gspca_dev *gspca_dev) { pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */ pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */ pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ } static void sd_stop0(struct gspca_dev *gspca_dev) { } /* this function is called at close time */ static void sd_close(struct gspca_dev *gspca_dev) { } /* -- convert pixart frames to Bayer -- */ /* Sonix decompressor struct B.S.(2004) */ static struct { u8 is_abs; u8 len; s8 val; } table[256]; void init_pixart_decoder(void) { int i, is_abs, val, len; for (i = 0; i < 256; i++) { is_abs = 0; val = 0; len = 0; if ((i & 0xC0) == 0) { /* code 00 */ val = 0; len = 2; } else if ((i & 0xC0) == 0x40) { /* code 01 */ val = -5; len = 2; } else if ((i & 0xC0) == 0x80) { /* code 10 */ val = 5; len = 2; } else if ((i & 0xF0) == 0xC0) { /* code 1100 */ val = -10; len = 4; } else if ((i & 0xF0) == 0xD0) { /* code 1101 */ val = 10; len = 4; } else if ((i & 0xF8) == 0xE0) { /* code 11100 */ val = -15; len = 5; } else if ((i & 0xF8) == 0xE8) { /* code 11101 */ val = 15; len = 5; } else if ((i & 0xFC) == 0xF0) { /* code 111100 */ val = -20; len = 6; } else if ((i & 0xFC) == 0xF4) { /* code 111101 */ val = 20; len = 6; } else if ((i & 0xF8) == 0xF8) { /* code 11111xxxxxx */ is_abs = 1; val = 0; len = 5; } table[i].is_abs = is_abs; table[i].val = val; table[i].len = len; } } /* auto gain and exposure algorithm based on the knee algorithm described here: http://ytse.tricolour.net/docs/LowLightOptimization.html */ static void pac207_do_auto_gain(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int i, steps, desired_avg_lum; int orig_gain = sd->gain; int orig_exposure = sd->exposure; int avg_lum = atomic_read(&sd->avg_lum); if (!sd->autogain || avg_lum == -1) return; if (sd->autogain_ignore_frames > 0) { sd->autogain_ignore_frames--; return; } /* correct desired lumination for the configured brightness */ desired_avg_lum = 100 + sd->brightness / 2; /* If we are of a multiple of deadzone, do multiple step to reach the desired lumination fast (with the risc of a slight overshoot) */ steps = abs(desired_avg_lum - avg_lum) / PAC207_AUTOGAIN_DEADZONE; for (i = 0; i < steps; i++) { if (avg_lum > desired_avg_lum) { if (sd->gain > PAC207_GAIN_KNEE) { sd->gain--; } else if (sd->exposure > PAC207_EXPOSURE_KNEE) { sd->exposure--; } else if (sd->gain > PAC207_GAIN_DEFAULT) { sd->gain--; } else if (sd->exposure > PAC207_EXPOSURE_MIN) { sd->exposure--; } else if (sd->gain > PAC207_GAIN_MIN) { sd->gain--; } else break; } else { if (sd->gain < PAC207_GAIN_DEFAULT) { sd->gain++; } else if (sd->exposure < PAC207_EXPOSURE_KNEE) { sd->exposure++; } else if (sd->gain < PAC207_GAIN_KNEE) { sd->gain++; } else if (sd->exposure < PAC207_EXPOSURE_MAX) { sd->exposure++; } else if (sd->gain < PAC207_GAIN_MAX) { sd->gain++; } else break; } } if (sd->exposure != orig_exposure || sd->gain != orig_gain) { if (sd->exposure != orig_exposure) pac207_write_reg(gspca_dev, 0x0002, sd->exposure); if (sd->gain != orig_gain) pac207_write_reg(gspca_dev, 0x000e, sd->gain); pac207_write_reg(gspca_dev, 0x13, 0x01); /* load reg to sen */ pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ sd->autogain_ignore_frames = PAC207_AUTOGAIN_IGNORE_FRAMES; } } static unsigned char *pac207_find_sof(struct gspca_dev *gspca_dev, unsigned char *m, int len) { struct sd *sd = (struct sd *) gspca_dev; int i; /* Search for the SOF marker (fixed part) in the header */ for (i = 0; i < len; i++) { if (m[i] == pac207_sof_marker[sd->sof_read]) { sd->sof_read++; if (sd->sof_read == sizeof(pac207_sof_marker)) { PDEBUG(D_STREAM, "SOF found, bytes to analyze: %u." " Frame starts at byte #%u", len, i + 1); sd->sof_read = 0; return m + i + 1; } } else sd->sof_read = 0; } return NULL; } static int pac207_decompress_row(struct gspca_dev *gspca_dev, struct gspca_frame *f, unsigned char *cdata, int len) { struct sd *sd = (struct sd *) gspca_dev; struct pac207_decoder_state *decoder_state = &sd->decoder_state; unsigned char *outp = decoder_state->line_decode_buf + decoder_state->line_read; int val, bitlen, bitpos = -decoder_state->no_remaining_bits; u8 code; /* first two pixels are stored as raw 8-bit */ while (decoder_state->line_read < 2) { *outp++ = *cdata++; decoder_state->line_read++; len--; if (len == 0) return 0; } while (decoder_state->line_read < gspca_dev->width) { if (bitpos < 0) { code = decoder_state->remaining_bits << (8 + bitpos) | cdata[0] >> -bitpos; } else { u8 *addr = cdata + bitpos / 8; code = addr[0] << (bitpos & 7) | addr[1] >> (8 - (bitpos & 7)); } bitlen = decoder_state->get_abs ? 6 : table[code].len; /* Stop decompressing if we're out of input data */ if ((bitpos + bitlen) > (len * 8)) break; if (decoder_state->get_abs) { *outp++ = code & 0xFC; decoder_state->line_read++; decoder_state->get_abs = 0; } else { if (table[code].is_abs) decoder_state->get_abs = 1; else { /* relative to left pixel */ val = outp[-2] + table[code].val; if (val > 0xff) val = 0xff; else if (val < 0) val = 0; *outp++ = val; decoder_state->line_read++; } } bitpos += bitlen; } if (decoder_state->line_read == gspca_dev->width) { int compressed_line_len; gspca_frame_add(gspca_dev, INTER_PACKET, f, decoder_state->line_decode_buf, gspca_dev->width); /* completely decompressed line, round pos to nearest word */ compressed_line_len = ((decoder_state->processed_bytes * 8 + bitpos + 15) / 16) * 2; len -= compressed_line_len - decoder_state->processed_bytes; if (len < 0) { decoder_state->discard_byte = 1; len = 0; } } else { decoder_state->processed_bytes += len; decoder_state->remaining_bits = cdata[bitpos/8]; decoder_state->no_remaining_bits = (8 - bitpos) & 7; len = 0; } return len; } static void pac207_decode_line_init(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; struct pac207_decoder_state *decoder_state = &sd->decoder_state; decoder_state->line_read = 0; decoder_state->line_state = LINE_HEADER1; decoder_state->processed_bytes = 0; decoder_state->no_remaining_bits = 0; decoder_state->get_abs = 0; } static void pac207_decode_frame_init(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; struct pac207_decoder_state *decoder_state = &sd->decoder_state; decoder_state->header_read = 0; decoder_state->discard_byte = 0; pac207_decode_line_init(gspca_dev); } static int pac207_decode_frame_data(struct gspca_dev *gspca_dev, struct gspca_frame *f, unsigned char *data, int len) { struct sd *sd = (struct sd *) gspca_dev; struct pac207_decoder_state *decoder_state = &sd->decoder_state; int needed = 0; /* first 11 bytes after sof marker: frame header */ if (decoder_state->header_read < 11) { /* get average lumination from frame header (byte 5) */ if (decoder_state->header_read < 5) { needed = 5 - decoder_state->header_read; if (len >= needed) atomic_set(&sd->avg_lum, data[needed-1]); } /* skip the rest of the header */ needed = 11 - decoder_state->header_read; if (len <= needed) { decoder_state->header_read += len; return 0; } data += needed; len -= needed; decoder_state->header_read = 11; } while (len) { if (decoder_state->discard_byte) { data++; len--; decoder_state->discard_byte = 0; continue; } switch (decoder_state->line_state) { case LINE_HEADER1: decoder_state->line_marker = data[0] << 8; decoder_state->line_state = LINE_HEADER2; needed = 1; break; case LINE_HEADER2: decoder_state->line_marker |= data[0]; switch (decoder_state->line_marker) { case 0x0FF0: decoder_state->line_state = LINE_UNCOMPRESSED; break; case 0x1EE1: decoder_state->line_state = LINE_COMPRESSED; break; default: PDEBUG(D_STREAM, "Error unknown line-header %04X", (int) decoder_state->line_marker); gspca_dev->last_packet_type = DISCARD_PACKET; return 0; } needed = 1; break; case LINE_UNCOMPRESSED: needed = gspca_dev->width - decoder_state->line_read; if (needed > len) needed = len; gspca_frame_add(gspca_dev, INTER_PACKET, f, data, needed); decoder_state->line_read += needed; break; case LINE_COMPRESSED: needed = len - pac207_decompress_row(gspca_dev, f, data, len); break; } data += needed; len -= needed; if (decoder_state->line_read == gspca_dev->width) { if ((f->data_end - f->data) == (gspca_dev->width * gspca_dev->height)) { /* eureka we've got a frame */ return 1; } pac207_decode_line_init(gspca_dev); } } return 0; } static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame, unsigned char *data, int len) { unsigned char *sof; int n; sof = pac207_find_sof(gspca_dev, data, len); if (sof) { /* finish decoding current frame */ if (gspca_dev->last_packet_type == INTER_PACKET) { n = sof - data; if (n > sizeof(pac207_sof_marker)) n -= sizeof(pac207_sof_marker); else n = 0; n = pac207_decode_frame_data(gspca_dev, frame, data, n); if (n) frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0); else PDEBUG(D_STREAM, "Incomplete frame"); } pac207_decode_frame_init(gspca_dev); gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0); len -= sof - data; data = sof; } if (gspca_dev->last_packet_type == DISCARD_PACKET) return; n = pac207_decode_frame_data(gspca_dev, frame, data, len); if (n) frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0); } static void setbrightness(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; pac207_write_reg(gspca_dev, 0x08, sd->brightness); pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ } static void setexposure(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; pac207_write_reg(gspca_dev, 0x02, sd->exposure); pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ } static void setgain(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; pac207_write_reg(gspca_dev, 0x0e, sd->gain); pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ } static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val) { struct sd *sd = (struct sd *) gspca_dev; sd->brightness = val; if (gspca_dev->streaming) setbrightness(gspca_dev); return 0; } static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val) { struct sd *sd = (struct sd *) gspca_dev; *val = sd->brightness; return 0; } static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val) { struct sd *sd = (struct sd *) gspca_dev; /* don't allow mucking with exposure when using autogain */ if (sd->autogain) return -EINVAL; sd->exposure = val; if (gspca_dev->streaming) setexposure(gspca_dev); return 0; } static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val) { struct sd *sd = (struct sd *) gspca_dev; *val = sd->exposure; return 0; } static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val) { struct sd *sd = (struct sd *) gspca_dev; /* don't allow mucking with gain when using autogain */ if (sd->autogain) return -EINVAL; sd->gain = val; if (gspca_dev->streaming) setgain(gspca_dev); return 0; } static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val) { struct sd *sd = (struct sd *) gspca_dev; *val = sd->gain; return 0; } static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val) { struct sd *sd = (struct sd *) gspca_dev; sd->autogain = val; /* when switching to autogain set defaults to make sure we are on a valid point of the autogain gain / exposure knee graph, and give this change time to take effect before doing autogain. */ if (sd->autogain) { sd->exposure = PAC207_EXPOSURE_DEFAULT; sd->gain = PAC207_GAIN_DEFAULT; if (gspca_dev->streaming) { sd->autogain_ignore_frames = PAC207_AUTOGAIN_IGNORE_FRAMES; setexposure(gspca_dev); setgain(gspca_dev); } } return 0; } static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val) { struct sd *sd = (struct sd *) gspca_dev; *val = sd->autogain; return 0; } /* sub-driver description */ static struct sd_desc sd_desc = { .name = MODULE_NAME, .ctrls = sd_ctrls, .nctrls = ARRAY_SIZE(sd_ctrls), .config = sd_config, .open = sd_open, .start = sd_start, .stopN = sd_stopN, .stop0 = sd_stop0, .close = sd_close, .dq_callback = pac207_do_auto_gain, .pkt_scan = sd_pkt_scan, }; /* -- module initialisation -- */ #define DVNM(name) .driver_info = (kernel_ulong_t) name static __devinitdata struct usb_device_id device_table[] = { {USB_DEVICE(0x041e, 0x4028), DVNM("Creative Webcam Vista Plus")}, {USB_DEVICE(0x093a, 0x2460), DVNM("PAC207 Qtec Webcam 100")}, {USB_DEVICE(0x093a, 0x2463), DVNM("Philips spc200nc pac207")}, {USB_DEVICE(0x093a, 0x2464), DVNM("Labtec Webcam 1200")}, {USB_DEVICE(0x093a, 0x2468), DVNM("PAC207")}, {USB_DEVICE(0x093a, 0x2470), DVNM("Genius GF112")}, {USB_DEVICE(0x093a, 0x2471), DVNM("PAC207 Genius VideoCam ge111")}, {USB_DEVICE(0x093a, 0x2472), DVNM("PAC207 Genius VideoCam ge110")}, {USB_DEVICE(0x2001, 0xf115), DVNM("D-Link DSB-C120")}, {} }; 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, "camera probe"); return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd)); } static struct usb_driver sd_driver = { .name = MODULE_NAME, .id_table = device_table, .probe = sd_probe, .disconnect = gspca_disconnect, }; /* -- module insert / remove -- */ static int __init sd_mod_init(void) { init_pixart_decoder(); if (usb_register(&sd_driver) < 0) return -1; PDEBUG(D_PROBE, "v%s registered", version); 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);