diff options
Diffstat (limited to 'drivers/media/video/gspca/pac7302.c')
| -rw-r--r-- | drivers/media/video/gspca/pac7302.c | 971 |
1 files changed, 971 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/pac7302.c b/drivers/media/video/gspca/pac7302.c new file mode 100644 index 00000000..30662fcc --- /dev/null +++ b/drivers/media/video/gspca/pac7302.c @@ -0,0 +1,971 @@ +/* + * Pixart PAC7302 driver + * + * Copyright (C) 2008-2012 Jean-Francois Moine <http://moinejf.free.fr> + * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li + * + * Separated from Pixart PAC7311 library by Márton Németh + * Camera button input handling by Márton Németh <nm127@freemail.hu> + * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> + * + * 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 + * 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 + */ + +/* Some documentation about various registers as determined by trial and error. + + Register page 1: + + Address Description + 0x78 Global control, bit 6 controls the LED (inverted) + + Register page 3: + + Address Description + 0x02 Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on + the 7302, so one of 3, 6, 9, ..., except when between 6 and 12? + 0x03 Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps + 0x04 Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps, + 63 -> ~27 fps, the 2 msb's must always be 1 !! + 0x05 Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0: + 1 -> ~30 fps, 2 -> ~20 fps + 0x0e Exposure bits 0-7, 0-448, 0 = use full frame time + 0x0f Exposure bit 8, 0-448, 448 = no exposure at all + 0x10 Master gain 0-31 + 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused + + The registers are accessed in the following functions: + + Page | Register | Function + -----+------------+--------------------------------------------------- + 0 | 0x0f..0x20 | setcolors() + 0 | 0xa2..0xab | setbrightcont() + 0 | 0xc5 | setredbalance() + 0 | 0xc6 | setwhitebalance() + 0 | 0xc7 | setbluebalance() + 0 | 0xdc | setbrightcont(), setcolors() + 3 | 0x02 | setexposure() + 3 | 0x10 | setgain() + 3 | 0x11 | setcolors(), setgain(), setexposure(), sethvflip() + 3 | 0x21 | sethvflip() +*/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/input.h> +#include <media/v4l2-chip-ident.h> +#include "gspca.h" +/* Include pac common sof detection functions */ +#include "pac_common.h" + +MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>, " + "Thomas Kaiser thomas@kaiser-linux.li"); +MODULE_DESCRIPTION("Pixart PAC7302"); +MODULE_LICENSE("GPL"); + +enum e_ctrl { + BRIGHTNESS, + CONTRAST, + COLORS, + WHITE_BALANCE, + RED_BALANCE, + BLUE_BALANCE, + GAIN, + AUTOGAIN, + EXPOSURE, + VFLIP, + HFLIP, + NCTRLS /* number of controls */ +}; + +/* specific webcam descriptor for pac7302 */ +struct sd { + struct gspca_dev gspca_dev; /* !! must be the first item */ + + struct gspca_ctrl ctrls[NCTRLS]; + + u8 flags; +#define FL_HFLIP 0x01 /* mirrored by default */ +#define FL_VFLIP 0x02 /* vertical flipped by default */ + + u8 sof_read; + s8 autogain_ignore_frames; + + atomic_t avg_lum; +}; + +/* V4L2 controls supported by the driver */ +static void setbrightcont(struct gspca_dev *gspca_dev); +static void setcolors(struct gspca_dev *gspca_dev); +static void setwhitebalance(struct gspca_dev *gspca_dev); +static void setredbalance(struct gspca_dev *gspca_dev); +static void setbluebalance(struct gspca_dev *gspca_dev); +static void setgain(struct gspca_dev *gspca_dev); +static void setexposure(struct gspca_dev *gspca_dev); +static void setautogain(struct gspca_dev *gspca_dev); +static void sethvflip(struct gspca_dev *gspca_dev); + +static const struct ctrl sd_ctrls[] = { +[BRIGHTNESS] = { + { + .id = V4L2_CID_BRIGHTNESS, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Brightness", + .minimum = 0, +#define BRIGHTNESS_MAX 0x20 + .maximum = BRIGHTNESS_MAX, + .step = 1, + .default_value = 0x10, + }, + .set_control = setbrightcont + }, +[CONTRAST] = { + { + .id = V4L2_CID_CONTRAST, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Contrast", + .minimum = 0, +#define CONTRAST_MAX 255 + .maximum = CONTRAST_MAX, + .step = 1, + .default_value = 127, + }, + .set_control = setbrightcont + }, +[COLORS] = { + { + .id = V4L2_CID_SATURATION, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Saturation", + .minimum = 0, +#define COLOR_MAX 255 + .maximum = COLOR_MAX, + .step = 1, + .default_value = 127 + }, + .set_control = setcolors + }, +[WHITE_BALANCE] = { + { + .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "White Balance", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 4, + }, + .set_control = setwhitebalance + }, +[RED_BALANCE] = { + { + .id = V4L2_CID_RED_BALANCE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Red", + .minimum = 0, + .maximum = 3, + .step = 1, + .default_value = 1, + }, + .set_control = setredbalance + }, +[BLUE_BALANCE] = { + { + .id = V4L2_CID_BLUE_BALANCE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Blue", + .minimum = 0, + .maximum = 3, + .step = 1, + .default_value = 1, + }, + .set_control = setbluebalance + }, +[GAIN] = { + { + .id = V4L2_CID_GAIN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Gain", + .minimum = 0, + .maximum = 255, + .step = 1, +#define GAIN_DEF 127 +#define GAIN_KNEE 255 /* Gain seems to cause little noise on the pac73xx */ + .default_value = GAIN_DEF, + }, + .set_control = setgain + }, +[EXPOSURE] = { + { + .id = V4L2_CID_EXPOSURE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Exposure", + .minimum = 0, + .maximum = 1023, + .step = 1, +#define EXPOSURE_DEF 66 /* 33 ms / 30 fps */ +#define EXPOSURE_KNEE 133 /* 66 ms / 15 fps */ + .default_value = EXPOSURE_DEF, + }, + .set_control = setexposure + }, +[AUTOGAIN] = { + { + .id = V4L2_CID_AUTOGAIN, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Auto Gain", + .minimum = 0, + .maximum = 1, + .step = 1, +#define AUTOGAIN_DEF 1 + .default_value = AUTOGAIN_DEF, + }, + .set_control = setautogain, + }, +[HFLIP] = { + { + .id = V4L2_CID_HFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Mirror", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, + .set_control = sethvflip, + }, +[VFLIP] = { + { + .id = V4L2_CID_VFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Vflip", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0, + }, + .set_control = sethvflip + }, +}; + +static const struct v4l2_pix_format vga_mode[] = { + {640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE, + .bytesperline = 640, + .sizeimage = 640 * 480 * 3 / 8 + 590, + .colorspace = V4L2_COLORSPACE_JPEG, + }, +}; + +#define LOAD_PAGE3 255 +#define END_OF_SEQUENCE 0 + +/* pac 7302 */ +static const u8 init_7302[] = { +/* index,value */ + 0xff, 0x01, /* page 1 */ + 0x78, 0x00, /* deactivate */ + 0xff, 0x01, + 0x78, 0x40, /* led off */ +}; +static const u8 start_7302[] = { +/* index, len, [value]* */ + 0xff, 1, 0x00, /* page 0 */ + 0x00, 12, 0x01, 0x40, 0x40, 0x40, 0x01, 0xe0, 0x02, 0x80, + 0x00, 0x00, 0x00, 0x00, + 0x0d, 24, 0x03, 0x01, 0x00, 0xb5, 0x07, 0xcb, 0x00, 0x00, + 0x07, 0xc8, 0x00, 0xea, 0x07, 0xcf, 0x07, 0xf7, + 0x07, 0x7e, 0x01, 0x0b, 0x00, 0x00, 0x00, 0x11, + 0x26, 2, 0xaa, 0xaa, + 0x2e, 1, 0x31, + 0x38, 1, 0x01, + 0x3a, 3, 0x14, 0xff, 0x5a, + 0x43, 11, 0x00, 0x0a, 0x18, 0x11, 0x01, 0x2c, 0x88, 0x11, + 0x00, 0x54, 0x11, + 0x55, 1, 0x00, + 0x62, 4, 0x10, 0x1e, 0x1e, 0x18, + 0x6b, 1, 0x00, + 0x6e, 3, 0x08, 0x06, 0x00, + 0x72, 3, 0x00, 0xff, 0x00, + 0x7d, 23, 0x01, 0x01, 0x58, 0x46, 0x50, 0x3c, 0x50, 0x3c, + 0x54, 0x46, 0x54, 0x56, 0x52, 0x50, 0x52, 0x50, + 0x56, 0x64, 0xa4, 0x00, 0xda, 0x00, 0x00, + 0xa2, 10, 0x22, 0x2c, 0x3c, 0x54, 0x69, 0x7c, 0x9c, 0xb9, + 0xd2, 0xeb, + 0xaf, 1, 0x02, + 0xb5, 2, 0x08, 0x08, + 0xb8, 2, 0x08, 0x88, + 0xc4, 4, 0xae, 0x01, 0x04, 0x01, + 0xcc, 1, 0x00, + 0xd1, 11, 0x01, 0x30, 0x49, 0x5e, 0x6f, 0x7f, 0x8e, 0xa9, + 0xc1, 0xd7, 0xec, + 0xdc, 1, 0x01, + 0xff, 1, 0x01, /* page 1 */ + 0x12, 3, 0x02, 0x00, 0x01, + 0x3e, 2, 0x00, 0x00, + 0x76, 5, 0x01, 0x20, 0x40, 0x00, 0xf2, + 0x7c, 1, 0x00, + 0x7f, 10, 0x4b, 0x0f, 0x01, 0x2c, 0x02, 0x58, 0x03, 0x20, + 0x02, 0x00, + 0x96, 5, 0x01, 0x10, 0x04, 0x01, 0x04, + 0xc8, 14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, + 0x07, 0x00, 0x01, 0x07, 0x04, 0x01, + 0xd8, 1, 0x01, + 0xdb, 2, 0x00, 0x01, + 0xde, 7, 0x00, 0x01, 0x04, 0x04, 0x00, 0x00, 0x00, + 0xe6, 4, 0x00, 0x00, 0x00, 0x01, + 0xeb, 1, 0x00, + 0xff, 1, 0x02, /* page 2 */ + 0x22, 1, 0x00, + 0xff, 1, 0x03, /* page 3 */ + 0, LOAD_PAGE3, /* load the page 3 */ + 0x11, 1, 0x01, + 0xff, 1, 0x02, /* page 2 */ + 0x13, 1, 0x00, + 0x22, 4, 0x1f, 0xa4, 0xf0, 0x96, + 0x27, 2, 0x14, 0x0c, + 0x2a, 5, 0xc8, 0x00, 0x18, 0x12, 0x22, + 0x64, 8, 0x00, 0x00, 0xf0, 0x01, 0x14, 0x44, 0x44, 0x44, + 0x6e, 1, 0x08, + 0xff, 1, 0x01, /* page 1 */ + 0x78, 1, 0x00, + 0, END_OF_SEQUENCE /* end of sequence */ +}; + +#define SKIP 0xaa +/* page 3 - the value SKIP says skip the index - see reg_w_page() */ +static const u8 page3_7302[] = { + 0x90, 0x40, 0x03, 0x00, 0xc0, 0x01, 0x14, 0x16, + 0x14, 0x12, 0x00, 0x00, 0x00, 0x02, 0x33, 0x00, + 0x0f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x47, 0x01, 0xb3, 0x01, 0x00, + 0x00, 0x08, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x21, + 0x00, 0x00, 0x00, 0x54, 0xf4, 0x02, 0x52, 0x54, + 0xa4, 0xb8, 0xe0, 0x2a, 0xf6, 0x00, 0x00, 0x00, + 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0xfc, 0x00, 0xf2, 0x1f, 0x04, 0x00, 0x00, + SKIP, 0x00, 0x00, 0xc0, 0xc0, 0x10, 0x00, 0x00, + 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x40, 0xff, 0x03, 0x19, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xc8, 0xc8, 0xc8, + 0xc8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, + 0x08, 0x10, 0x24, 0x40, 0x00, 0x00, 0x00, 0x00, + 0x01, 0x00, 0x02, 0x47, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x02, 0xfa, 0x00, 0x64, 0x5a, 0x28, 0x00, + 0x00 +}; + +static void reg_w_buf(struct gspca_dev *gspca_dev, + u8 index, + const u8 *buffer, int len) +{ + int ret; + + if (gspca_dev->usb_err < 0) + return; + memcpy(gspca_dev->usb_buf, buffer, len); + ret = usb_control_msg(gspca_dev->dev, + usb_sndctrlpipe(gspca_dev->dev, 0), + 0, /* request */ + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, /* value */ + index, gspca_dev->usb_buf, len, + 500); + if (ret < 0) { + pr_err("reg_w_buf failed i: %02x error %d\n", + index, ret); + gspca_dev->usb_err = ret; + } +} + + +static void reg_w(struct gspca_dev *gspca_dev, + u8 index, + u8 value) +{ + int ret; + + if (gspca_dev->usb_err < 0) + return; + gspca_dev->usb_buf[0] = value; + ret = usb_control_msg(gspca_dev->dev, + usb_sndctrlpipe(gspca_dev->dev, 0), + 0, /* request */ + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, index, gspca_dev->usb_buf, 1, + 500); + if (ret < 0) { + pr_err("reg_w() failed i: %02x v: %02x error %d\n", + index, value, ret); + gspca_dev->usb_err = ret; + } +} + +static void reg_w_seq(struct gspca_dev *gspca_dev, + const u8 *seq, int len) +{ + while (--len >= 0) { + reg_w(gspca_dev, seq[0], seq[1]); + seq += 2; + } +} + +/* load the beginning of a page */ +static void reg_w_page(struct gspca_dev *gspca_dev, + const u8 *page, int len) +{ + int index; + int ret = 0; + + if (gspca_dev->usb_err < 0) + return; + for (index = 0; index < len; index++) { + if (page[index] == SKIP) /* skip this index */ + continue; + gspca_dev->usb_buf[0] = page[index]; + ret = usb_control_msg(gspca_dev->dev, + usb_sndctrlpipe(gspca_dev->dev, 0), + 0, /* request */ + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, index, gspca_dev->usb_buf, 1, + 500); + if (ret < 0) { + pr_err("reg_w_page() failed i: %02x v: %02x error %d\n", + index, page[index], ret); + gspca_dev->usb_err = ret; + break; + } + } +} + +/* output a variable sequence */ +static void reg_w_var(struct gspca_dev *gspca_dev, + const u8 *seq, + const u8 *page3, unsigned int page3_len) +{ + int index, len; + + for (;;) { + index = *seq++; + len = *seq++; + switch (len) { + case END_OF_SEQUENCE: + return; + case LOAD_PAGE3: + reg_w_page(gspca_dev, page3, page3_len); + break; + default: +#ifdef GSPCA_DEBUG + if (len > USB_BUF_SZ) { + PDEBUG(D_ERR|D_STREAM, + "Incorrect variable sequence"); + return; + } +#endif + while (len > 0) { + if (len < 8) { + reg_w_buf(gspca_dev, + index, seq, len); + seq += len; + break; + } + reg_w_buf(gspca_dev, index, seq, 8); + seq += 8; + index += 8; + len -= 8; + } + } + } + /* not reached */ +} + +/* this function is called at probe time for pac7302 */ +static int sd_config(struct gspca_dev *gspca_dev, + const struct usb_device_id *id) +{ + struct sd *sd = (struct sd *) gspca_dev; + struct cam *cam; + + cam = &gspca_dev->cam; + + cam->cam_mode = vga_mode; /* only 640x480 */ + cam->nmodes = ARRAY_SIZE(vga_mode); + + gspca_dev->cam.ctrls = sd->ctrls; + + sd->flags = id->driver_info; + return 0; +} + +/* This function is used by pac7302 only */ +static void setbrightcont(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int i, v; + static const u8 max[10] = + {0x29, 0x33, 0x42, 0x5a, 0x6e, 0x80, 0x9f, 0xbb, + 0xd4, 0xec}; + static const u8 delta[10] = + {0x35, 0x33, 0x33, 0x2f, 0x2a, 0x25, 0x1e, 0x17, + 0x11, 0x0b}; + + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + for (i = 0; i < 10; i++) { + v = max[i]; + v += (sd->ctrls[BRIGHTNESS].val - BRIGHTNESS_MAX) + * 150 / BRIGHTNESS_MAX; /* 200 ? */ + v -= delta[i] * sd->ctrls[CONTRAST].val / CONTRAST_MAX; + if (v < 0) + v = 0; + else if (v > 0xff) + v = 0xff; + reg_w(gspca_dev, 0xa2 + i, v); + } + reg_w(gspca_dev, 0xdc, 0x01); +} + +/* This function is used by pac7302 only */ +static void setcolors(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int i, v; + static const int a[9] = + {217, -212, 0, -101, 170, -67, -38, -315, 355}; + static const int b[9] = + {19, 106, 0, 19, 106, 1, 19, 106, 1}; + + reg_w(gspca_dev, 0xff, 0x03); /* page 3 */ + reg_w(gspca_dev, 0x11, 0x01); + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + for (i = 0; i < 9; i++) { + v = a[i] * sd->ctrls[COLORS].val / COLOR_MAX + b[i]; + reg_w(gspca_dev, 0x0f + 2 * i, (v >> 8) & 0x07); + reg_w(gspca_dev, 0x0f + 2 * i + 1, v); + } + reg_w(gspca_dev, 0xdc, 0x01); +} + +static void setwhitebalance(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + reg_w(gspca_dev, 0xc6, sd->ctrls[WHITE_BALANCE].val); + + reg_w(gspca_dev, 0xdc, 0x01); +} + +static void setredbalance(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + reg_w(gspca_dev, 0xc5, sd->ctrls[RED_BALANCE].val); + + reg_w(gspca_dev, 0xdc, 0x01); +} + +static void setbluebalance(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + reg_w(gspca_dev, 0xc7, sd->ctrls[BLUE_BALANCE].val); + + reg_w(gspca_dev, 0xdc, 0x01); +} + +static void setgain(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w(gspca_dev, 0xff, 0x03); /* page 3 */ + reg_w(gspca_dev, 0x10, sd->ctrls[GAIN].val >> 3); + + /* load registers to sensor (Bit 0, auto clear) */ + reg_w(gspca_dev, 0x11, 0x01); +} + +static void setexposure(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 clockdiv; + u16 exposure; + + /* register 2 of frame 3 contains the clock divider configuring the + no fps according to the formula: 90 / reg. sd->exposure is the + desired exposure time in 0.5 ms. */ + clockdiv = (90 * sd->ctrls[EXPOSURE].val + 1999) / 2000; + + /* Note clockdiv = 3 also works, but when running at 30 fps, depending + on the scene being recorded, the camera switches to another + quantization table for certain JPEG blocks, and we don't know how + to decompress these blocks. So we cap the framerate at 15 fps */ + if (clockdiv < 6) + clockdiv = 6; + else if (clockdiv > 63) + clockdiv = 63; + + /* reg2 MUST be a multiple of 3, except when between 6 and 12? + Always round up, otherwise we cannot get the desired frametime + using the partial frame time exposure control */ + if (clockdiv < 6 || clockdiv > 12) + clockdiv = ((clockdiv + 2) / 3) * 3; + + /* frame exposure time in ms = 1000 * clockdiv / 90 -> + exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90) */ + exposure = (sd->ctrls[EXPOSURE].val * 45 * 448) / (1000 * clockdiv); + /* 0 = use full frametime, 448 = no exposure, reverse it */ + exposure = 448 - exposure; + + reg_w(gspca_dev, 0xff, 0x03); /* page 3 */ + reg_w(gspca_dev, 0x02, clockdiv); + reg_w(gspca_dev, 0x0e, exposure & 0xff); + reg_w(gspca_dev, 0x0f, exposure >> 8); + + /* load registers to sensor (Bit 0, auto clear) */ + reg_w(gspca_dev, 0x11, 0x01); +} + +static void setautogain(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + /* 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->ctrls[AUTOGAIN].val) { + sd->ctrls[EXPOSURE].val = EXPOSURE_DEF; + sd->ctrls[GAIN].val = GAIN_DEF; + sd->autogain_ignore_frames = + PAC_AUTOGAIN_IGNORE_FRAMES; + } else { + sd->autogain_ignore_frames = -1; + } + setexposure(gspca_dev); + setgain(gspca_dev); +} + +static void sethvflip(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data, hflip, vflip; + + hflip = sd->ctrls[HFLIP].val; + if (sd->flags & FL_HFLIP) + hflip = !hflip; + vflip = sd->ctrls[VFLIP].val; + if (sd->flags & FL_VFLIP) + vflip = !vflip; + + reg_w(gspca_dev, 0xff, 0x03); /* page 3 */ + data = (hflip ? 0x08 : 0x00) | (vflip ? 0x04 : 0x00); + reg_w(gspca_dev, 0x21, data); + + /* load registers to sensor (Bit 0, auto clear) */ + reg_w(gspca_dev, 0x11, 0x01); +} + +/* this function is called at probe and resume time for pac7302 */ +static int sd_init(struct gspca_dev *gspca_dev) +{ + reg_w_seq(gspca_dev, init_7302, sizeof(init_7302)/2); + return gspca_dev->usb_err; +} + +static int sd_start(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w_var(gspca_dev, start_7302, + page3_7302, sizeof(page3_7302)); + setbrightcont(gspca_dev); + setcolors(gspca_dev); + setwhitebalance(gspca_dev); + setredbalance(gspca_dev); + setbluebalance(gspca_dev); + setautogain(gspca_dev); + sethvflip(gspca_dev); + + /* only resolution 640x480 is supported for pac7302 */ + + sd->sof_read = 0; + atomic_set(&sd->avg_lum, 270 + sd->ctrls[BRIGHTNESS].val); + + /* start stream */ + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x78, 0x01); + + return gspca_dev->usb_err; +} + +static void sd_stopN(struct gspca_dev *gspca_dev) +{ + + /* stop stream */ + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x78, 0x00); +} + +/* called on streamoff with alt 0 and on disconnect for pac7302 */ +static void sd_stop0(struct gspca_dev *gspca_dev) +{ + if (!gspca_dev->present) + return; + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x78, 0x40); +} + +/* !! coarse_grained_expo_autogain is not used !! */ +#define exp_too_low_cnt flags +#define exp_too_high_cnt sof_read +#include "autogain_functions.h" + +static void do_autogain(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int avg_lum = atomic_read(&sd->avg_lum); + int desired_lum; + const int deadzone = 30; + + if (sd->autogain_ignore_frames < 0) + return; + + if (sd->autogain_ignore_frames > 0) { + sd->autogain_ignore_frames--; + } else { + desired_lum = 270 + sd->ctrls[BRIGHTNESS].val; + + auto_gain_n_exposure(gspca_dev, avg_lum, desired_lum, + deadzone, GAIN_KNEE, EXPOSURE_KNEE); + sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; + } +} + +/* JPEG header */ +static const u8 jpeg_header[] = { + 0xff, 0xd8, /* SOI: Start of Image */ + + 0xff, 0xc0, /* SOF0: Start of Frame (Baseline DCT) */ + 0x00, 0x11, /* length = 17 bytes (including this length field) */ + 0x08, /* Precision: 8 */ + 0x02, 0x80, /* height = 640 (image rotated) */ + 0x01, 0xe0, /* width = 480 */ + 0x03, /* Number of image components: 3 */ + 0x01, 0x21, 0x00, /* ID=1, Subsampling 1x1, Quantization table: 0 */ + 0x02, 0x11, 0x01, /* ID=2, Subsampling 2x1, Quantization table: 1 */ + 0x03, 0x11, 0x01, /* ID=3, Subsampling 2x1, Quantization table: 1 */ + + 0xff, 0xda, /* SOS: Start Of Scan */ + 0x00, 0x0c, /* length = 12 bytes (including this length field) */ + 0x03, /* number of components: 3 */ + 0x01, 0x00, /* selector 1, table 0x00 */ + 0x02, 0x11, /* selector 2, table 0x11 */ + 0x03, 0x11, /* selector 3, table 0x11 */ + 0x00, 0x3f, /* Spectral selection: 0 .. 63 */ + 0x00 /* Successive approximation: 0 */ +}; + +/* this function is run at interrupt level */ +static void sd_pkt_scan(struct gspca_dev *gspca_dev, + u8 *data, /* isoc packet */ + int len) /* iso packet length */ +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 *image; + u8 *sof; + + sof = pac_find_sof(&sd->sof_read, data, len); + if (sof) { + int n, lum_offset, footer_length; + + /* 6 bytes after the FF D9 EOF marker a number of lumination + bytes are send corresponding to different parts of the + image, the 14th and 15th byte after the EOF seem to + correspond to the center of the image */ + lum_offset = 61 + sizeof pac_sof_marker; + footer_length = 74; + + /* Finish decoding current frame */ + n = (sof - data) - (footer_length + sizeof pac_sof_marker); + if (n < 0) { + gspca_dev->image_len += n; + n = 0; + } else { + gspca_frame_add(gspca_dev, INTER_PACKET, data, n); + } + + image = gspca_dev->image; + if (image != NULL + && image[gspca_dev->image_len - 2] == 0xff + && image[gspca_dev->image_len - 1] == 0xd9) + gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); + + n = sof - data; + len -= n; + data = sof; + + /* Get average lumination */ + if (gspca_dev->last_packet_type == LAST_PACKET && + n >= lum_offset) + atomic_set(&sd->avg_lum, data[-lum_offset] + + data[-lum_offset + 1]); + + /* Start the new frame with the jpeg header */ + /* The PAC7302 has the image rotated 90 degrees */ + gspca_frame_add(gspca_dev, FIRST_PACKET, + jpeg_header, sizeof jpeg_header); + } + gspca_frame_add(gspca_dev, INTER_PACKET, data, len); +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int sd_dbg_s_register(struct gspca_dev *gspca_dev, + struct v4l2_dbg_register *reg) +{ + u8 index; + u8 value; + + /* reg->reg: bit0..15: reserved for register index (wIndex is 16bit + long on the USB bus) + */ + if (reg->match.type == V4L2_CHIP_MATCH_HOST && + reg->match.addr == 0 && + (reg->reg < 0x000000ff) && + (reg->val <= 0x000000ff) + ) { + /* Currently writing to page 0 is only supported. */ + /* reg_w() only supports 8bit index */ + index = reg->reg; + value = reg->val; + + /* Note that there shall be no access to other page + by any other function between the page swith and + the actual register write */ + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + reg_w(gspca_dev, index, value); + + reg_w(gspca_dev, 0xdc, 0x01); + } + return gspca_dev->usb_err; +} + +static int sd_chip_ident(struct gspca_dev *gspca_dev, + struct v4l2_dbg_chip_ident *chip) +{ + int ret = -EINVAL; + + if (chip->match.type == V4L2_CHIP_MATCH_HOST && + chip->match.addr == 0) { + chip->revision = 0; + chip->ident = V4L2_IDENT_UNKNOWN; + ret = 0; + } + return ret; +} +#endif + +#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) /* interrput packet length */ +{ + int ret = -EINVAL; + u8 data0, data1; + + if (len == 2) { + data0 = data[0]; + data1 = data[1]; + if ((data0 == 0x00 && data1 == 0x11) || + (data0 == 0x22 && data1 == 0x33) || + (data0 == 0x44 && data1 == 0x55) || + (data0 == 0x66 && data1 == 0x77) || + (data0 == 0x88 && data1 == 0x99) || + (data0 == 0xaa && data1 == 0xbb) || + (data0 == 0xcc && data1 == 0xdd) || + (data0 == 0xee && data1 == 0xff)) { + input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1); + input_sync(gspca_dev->input_dev); + input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); + input_sync(gspca_dev->input_dev); + ret = 0; + } + } + + return ret; +} +#endif + +/* sub-driver description for pac7302 */ +static const struct sd_desc sd_desc = { + .name = KBUILD_MODNAME, + .ctrls = sd_ctrls, + .nctrls = ARRAY_SIZE(sd_ctrls), + .config = sd_config, + .init = sd_init, + .start = sd_start, + .stopN = sd_stopN, + .stop0 = sd_stop0, + .pkt_scan = sd_pkt_scan, + .dq_callback = do_autogain, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .set_register = sd_dbg_s_register, + .get_chip_ident = sd_chip_ident, +#endif +#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) + .int_pkt_scan = sd_int_pkt_scan, +#endif +}; + +/* -- module initialisation -- */ +static const struct usb_device_id device_table[] = { + {USB_DEVICE(0x06f8, 0x3009)}, + {USB_DEVICE(0x06f8, 0x301b)}, + {USB_DEVICE(0x093a, 0x2620)}, + {USB_DEVICE(0x093a, 0x2621)}, + {USB_DEVICE(0x093a, 0x2622), .driver_info = FL_VFLIP}, + {USB_DEVICE(0x093a, 0x2624), .driver_info = FL_VFLIP}, + {USB_DEVICE(0x093a, 0x2625)}, + {USB_DEVICE(0x093a, 0x2626)}, + {USB_DEVICE(0x093a, 0x2628)}, + {USB_DEVICE(0x093a, 0x2629), .driver_info = FL_VFLIP}, + {USB_DEVICE(0x093a, 0x262a)}, + {USB_DEVICE(0x093a, 0x262c)}, + {USB_DEVICE(0x145f, 0x013c)}, + {} +}; +MODULE_DEVICE_TABLE(usb, device_table); + +/* -- device connect -- */ +static int sd_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), + THIS_MODULE); +} + +static struct usb_driver sd_driver = { + .name = KBUILD_MODNAME, + .id_table = device_table, + .probe = sd_probe, + .disconnect = gspca_disconnect, +#ifdef CONFIG_PM + .suspend = gspca_suspend, + .resume = gspca_resume, +#endif +}; + +module_usb_driver(sd_driver); |