diff options
Diffstat (limited to 'drivers/media/usb/gspca/pac7302.c')
| -rw-r--r-- | drivers/media/usb/gspca/pac7302.c | 982 |
1 files changed, 982 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/pac7302.c b/drivers/media/usb/gspca/pac7302.c new file mode 100644 index 0000000..201a387 --- /dev/null +++ b/drivers/media/usb/gspca/pac7302.c @@ -0,0 +1,982 @@ +/* + * 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 0: + * + * Address Description + * 0x01 Red balance control + * 0x02 Green balance control + * 0x03 Blue balance control + * The Windows driver uses a quadratic approach to map + * the settable values (0-200) on register values: + * min=0x20, default=0x40, max=0x80 + * 0x0f-0x20 Color and saturation control + * 0xa2-0xab Brightness, contrast and gamma control + * 0xb6 Sharpness control (bits 0-4) + * + * Register page 1: + * + * Address Description + * 0x78 Global control, bit 6 controls the LED (inverted) + * 0x80 Compression balance, 2 interesting settings: + * 0x0f Default + * 0x50 Values >= this switch the camera to a lower compression, + * using the same table for both luminance and chrominance. + * This gives a sharper picture. Only usable when running + * at < 15 fps! Note currently the driver does not use this + * as the quality gain is small and the generated JPG-s are + * only understood by v4l-utils >= 0.8.9 + * + * 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 Gain 0-31 + * 0x12 Another gain 0-31, unlike 0x10 this one seems to start with an + * amplification value of 1 rather then 0 at its lowest setting + * 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused + * 0x80 Another framerate control, best left at 1, moving it from 1 to + * 2 causes the framerate to become 3/4th of what it was, and + * also seems to cause pixel averaging, resulting in an effective + * resolution of 320x240 and thus a much blockier image + * + * The registers are accessed in the following functions: + * + * Page | Register | Function + * -----+------------+--------------------------------------------------- + * 0 | 0x01 | setredbalance() + * 0 | 0x03 | setbluebalance() + * 0 | 0x0f..0x20 | setcolors() + * 0 | 0xa2..0xab | setbrightcont() + * 0 | 0xb6 | setsharpness() + * 0 | 0xc6 | setwhitebalance() + * 0 | 0xdc | setbrightcont(), setcolors() + * 3 | 0x02 | setexposure() + * 3 | 0x10, 0x12 | 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" + +#define PAC7302_RGB_BALANCE_MIN 0 +#define PAC7302_RGB_BALANCE_MAX 200 +#define PAC7302_RGB_BALANCE_DEFAULT 100 +#define PAC7302_GAIN_DEFAULT 15 +#define PAC7302_GAIN_KNEE 42 +#define PAC7302_EXPOSURE_DEFAULT 66 /* 33 ms / 30 fps */ +#define PAC7302_EXPOSURE_KNEE 133 /* 66 ms / 15 fps */ + +MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>, " + "Thomas Kaiser thomas@kaiser-linux.li"); +MODULE_DESCRIPTION("Pixart PAC7302"); +MODULE_LICENSE("GPL"); + +struct sd { + struct gspca_dev gspca_dev; /* !! must be the first item */ + + struct { /* brightness / contrast cluster */ + struct v4l2_ctrl *brightness; + struct v4l2_ctrl *contrast; + }; + struct v4l2_ctrl *saturation; + struct v4l2_ctrl *white_balance; + struct v4l2_ctrl *red_balance; + struct v4l2_ctrl *blue_balance; + struct { /* flip cluster */ + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + }; + struct v4l2_ctrl *sharpness; + 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; +}; + +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 + +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: + if (len > USB_BUF_SZ) { + PERR("Incorrect variable sequence"); + return; + } + 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); + + sd->flags = id->driver_info; + return 0; +} + +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->brightness->val - sd->brightness->maximum) + * 150 / sd->brightness->maximum; /* 200 ? */ + v -= delta[i] * sd->contrast->val / sd->contrast->maximum; + if (v < 0) + v = 0; + else if (v > 0xff) + v = 0xff; + reg_w(gspca_dev, 0xa2 + i, v); + } + reg_w(gspca_dev, 0xdc, 0x01); +} + +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->saturation->val / sd->saturation->maximum; + v += 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->white_balance->val); + + reg_w(gspca_dev, 0xdc, 0x01); +} + +static u8 rgbbalance_ctrl_to_reg_value(s32 rgb_ctrl_val) +{ + const unsigned int k = 1000; /* precision factor */ + unsigned int norm; + + /* Normed value [0...k] */ + norm = k * (rgb_ctrl_val - PAC7302_RGB_BALANCE_MIN) + / (PAC7302_RGB_BALANCE_MAX - PAC7302_RGB_BALANCE_MIN); + /* Qudratic apporach improves control at small (register) values: */ + return 64 * norm * norm / (k*k) + 32 * norm / k + 32; + /* Y = 64*X*X + 32*X + 32 + * => register values 0x20-0x80; Windows driver uses these limits */ + + /* NOTE: for full value range (0x00-0xff) use + * Y = 254*X*X + X + * => 254 * norm * norm / (k*k) + 1 * norm / k */ +} + +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, 0x01, + rgbbalance_ctrl_to_reg_value(sd->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, 0x03, + rgbbalance_ctrl_to_reg_value(sd->blue_balance->val)); + + reg_w(gspca_dev, 0xdc, 0x01); +} + +static void setgain(struct gspca_dev *gspca_dev) +{ + u8 reg10, reg12; + + if (gspca_dev->gain->val < 32) { + reg10 = gspca_dev->gain->val; + reg12 = 0; + } else { + reg10 = 31; + reg12 = gspca_dev->gain->val - 31; + } + + reg_w(gspca_dev, 0xff, 0x03); /* page 3 */ + reg_w(gspca_dev, 0x10, reg10); + reg_w(gspca_dev, 0x12, reg12); + + /* load registers to sensor (Bit 0, auto clear) */ + reg_w(gspca_dev, 0x11, 0x01); +} + +static void setexposure(struct gspca_dev *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 * gspca_dev->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; + + /* + * Register 2 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 = (gspca_dev->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 sethvflip(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data, hflip, vflip; + + hflip = sd->hflip->val; + if (sd->flags & FL_HFLIP) + hflip = !hflip; + vflip = sd->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); +} + +static void setsharpness(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + reg_w(gspca_dev, 0xb6, sd->sharpness->val); + + reg_w(gspca_dev, 0xdc, 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_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct gspca_dev *gspca_dev = + container_of(ctrl->handler, struct gspca_dev, ctrl_handler); + struct sd *sd = (struct sd *)gspca_dev; + + gspca_dev->usb_err = 0; + + if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->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. */ + gspca_dev->exposure->val = PAC7302_EXPOSURE_DEFAULT; + gspca_dev->gain->val = PAC7302_GAIN_DEFAULT; + sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; + } + + if (!gspca_dev->streaming) + return 0; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + setbrightcont(gspca_dev); + break; + case V4L2_CID_SATURATION: + setcolors(gspca_dev); + break; + case V4L2_CID_WHITE_BALANCE_TEMPERATURE: + setwhitebalance(gspca_dev); + break; + case V4L2_CID_RED_BALANCE: + setredbalance(gspca_dev); + break; + case V4L2_CID_BLUE_BALANCE: + setbluebalance(gspca_dev); + break; + case V4L2_CID_AUTOGAIN: + if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val)) + setexposure(gspca_dev); + if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val)) + setgain(gspca_dev); + break; + case V4L2_CID_HFLIP: + sethvflip(gspca_dev); + break; + case V4L2_CID_SHARPNESS: + setsharpness(gspca_dev); + break; + default: + return -EINVAL; + } + return gspca_dev->usb_err; +} + +static const struct v4l2_ctrl_ops sd_ctrl_ops = { + .s_ctrl = sd_s_ctrl, +}; + +/* this function is called at probe time */ +static int sd_init_controls(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; + + gspca_dev->vdev.ctrl_handler = hdl; + v4l2_ctrl_handler_init(hdl, 12); + + sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_BRIGHTNESS, 0, 32, 1, 16); + sd->contrast = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_CONTRAST, 0, 255, 1, 127); + + sd->saturation = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_SATURATION, 0, 255, 1, 127); + sd->white_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_WHITE_BALANCE_TEMPERATURE, + 0, 255, 1, 55); + sd->red_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_RED_BALANCE, + PAC7302_RGB_BALANCE_MIN, + PAC7302_RGB_BALANCE_MAX, + 1, PAC7302_RGB_BALANCE_DEFAULT); + sd->blue_balance = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_BLUE_BALANCE, + PAC7302_RGB_BALANCE_MIN, + PAC7302_RGB_BALANCE_MAX, + 1, PAC7302_RGB_BALANCE_DEFAULT); + + gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_AUTOGAIN, 0, 1, 1, 1); + gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_EXPOSURE, 0, 1023, 1, + PAC7302_EXPOSURE_DEFAULT); + gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_GAIN, 0, 62, 1, + PAC7302_GAIN_DEFAULT); + + sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + + sd->sharpness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, + V4L2_CID_SHARPNESS, 0, 15, 1, 8); + + if (hdl->error) { + pr_err("Could not initialize controls\n"); + return hdl->error; + } + + v4l2_ctrl_cluster(2, &sd->brightness); + v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false); + v4l2_ctrl_cluster(2, &sd->hflip); + return 0; +} + +/* -- start the camera -- */ +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)); + + sd->sof_read = 0; + sd->autogain_ignore_frames = 0; + atomic_set(&sd->avg_lum, 270 + sd->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); +} + +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->brightness->val; + + if (gspca_expo_autogain(gspca_dev, avg_lum, desired_lum, + deadzone, PAC7302_GAIN_KNEE, + PAC7302_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(gspca_dev, &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 CPTCFG_VIDEO_ADV_DEBUG +static int sd_dbg_s_register(struct gspca_dev *gspca_dev, + const 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 switch 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 IS_ENABLED(CONFIG_INPUT) +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, + .config = sd_config, + .init = sd_init, + .init_controls = sd_init_controls, + .start = sd_start, + .stopN = sd_stopN, + .stop0 = sd_stop0, + .pkt_scan = sd_pkt_scan, + .dq_callback = do_autogain, +#ifdef CPTCFG_VIDEO_ADV_DEBUG + .set_register = sd_dbg_s_register, + .get_chip_ident = sd_chip_ident, +#endif +#if IS_ENABLED(CONFIG_INPUT) + .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, 0x2627), .driver_info = FL_VFLIP}, + {USB_DEVICE(0x093a, 0x2628)}, + {USB_DEVICE(0x093a, 0x2629), .driver_info = FL_VFLIP}, + {USB_DEVICE(0x093a, 0x262a)}, + {USB_DEVICE(0x093a, 0x262c)}, + {USB_DEVICE(0x145f, 0x013c)}, + {USB_DEVICE(0x1ae7, 0x2001)}, /* SpeedLink Snappy Mic SL-6825-SBK */ + {} +}; +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, + .reset_resume = gspca_resume, +#endif +}; + +module_usb_driver(sd_driver); |