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/*
* Pixart PAC7311 library
* Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
*
* V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
*
* 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.
*/
/* Some documentation about various registers as determined by trial and error.
*
* Register page 1:
*
* Address Description
* 0x08 Unknown compressor related, must always be 8 except when not
* in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 !
* 0x1b Auto white balance related, bit 0 is AWB enable (inverted)
* bits 345 seem to toggle per color gains on/off (inverted)
* 0x78 Global control, bit 6 controls the LED (inverted)
* 0x80 Compression balance, interesting settings:
* 0x01 Use this to allow the camera to switch to higher compr.
* on the fly. Needed to stay within bandwidth @ 640x480@30
* 0x1c From usb captures under Windows for 640x480
* 0x2a Values >= this switch the camera to a lower compression,
* using the same table for both luminance and chrominance.
* This gives a sharper picture. Usable only at 640x480@ <
* 15 fps or 320x240 / 160x120. 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
* 0x3f From usb captures under Windows for 320x240
* 0x69 From usb captures under Windows for 160x120
*
* Register page 4:
*
* Address Description
* 0x02 Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on
* the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
* 0x0f Master gain 1-245, low value = high gain
* 0x10 Another gain 0-15, limited influence (1-2x gain I guess)
* 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
* Note setting vflip disabled leads to a much lower image quality,
* so we always vflip, and tell userspace to flip it back
* 0x27 Seems to toggle various gains on / off, Setting bit 7 seems to
* completely disable the analog amplification block. Set to 0x68
* for max gain, 0x14 for minimal gain.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "pac7311"
#include <linux/input.h>
#include "gspca.h"
/* Include pac common sof detection functions */
#include "pac_common.h"
#define PAC7311_GAIN_DEFAULT 122
#define PAC7311_EXPOSURE_DEFAULT 3 /* 20 fps, avoid using high compr. */
MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");
MODULE_DESCRIPTION("Pixart PAC7311");
MODULE_LICENSE("GPL");
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct v4l2_ctrl *contrast;
struct v4l2_ctrl *hflip;
u8 sof_read;
u8 autogain_ignore_frames;
atomic_t avg_lum;
};
static const struct v4l2_pix_format vga_mode[] = {
{160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
.bytesperline = 160,
.sizeimage = 160 * 120 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 2},
{320, 240, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
.bytesperline = 320,
.sizeimage = 320 * 240 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 1},
{640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
.bytesperline = 640,
.sizeimage = 640 * 480 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 0},
};
#define LOAD_PAGE4 254
#define END_OF_SEQUENCE 0
static const __u8 init_7311[] = {
0xff, 0x01,
0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */
0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */
0x78, 0x44, /* Bit_0=start stream, Bit_6=LED */
0xff, 0x04,
0x27, 0x80,
0x28, 0xca,
0x29, 0x53,
0x2a, 0x0e,
0xff, 0x01,
0x3e, 0x20,
};
static const __u8 start_7311[] = {
/* index, len, [value]* */
0xff, 1, 0x01, /* page 1 */
0x02, 43, 0x48, 0x0a, 0x40, 0x08, 0x00, 0x00, 0x08, 0x00,
0x06, 0xff, 0x11, 0xff, 0x5a, 0x30, 0x90, 0x4c,
0x00, 0x07, 0x00, 0x0a, 0x10, 0x00, 0xa0, 0x10,
0x02, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00,
0x3e, 42, 0x00, 0x00, 0x78, 0x52, 0x4a, 0x52, 0x78, 0x6e,
0x48, 0x46, 0x48, 0x6e, 0x5f, 0x49, 0x42, 0x49,
0x5f, 0x5f, 0x49, 0x42, 0x49, 0x5f, 0x6e, 0x48,
0x46, 0x48, 0x6e, 0x78, 0x52, 0x4a, 0x52, 0x78,
0x00, 0x00, 0x09, 0x1b, 0x34, 0x49, 0x5c, 0x9b,
0xd0, 0xff,
0x78, 6, 0x44, 0x00, 0xf2, 0x01, 0x01, 0x80,
0x7f, 18, 0x2a, 0x1c, 0x00, 0xc8, 0x02, 0x58, 0x03, 0x84,
0x12, 0x00, 0x1a, 0x04, 0x08, 0x0c, 0x10, 0x14,
0x18, 0x20,
0x96, 3, 0x01, 0x08, 0x04,
0xa0, 4, 0x44, 0x44, 0x44, 0x04,
0xf0, 13, 0x01, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x00,
0x3f, 0x00, 0x0a, 0x01, 0x00,
0xff, 1, 0x04, /* page 4 */
0, LOAD_PAGE4, /* load the page 4 */
0x11, 1, 0x01,
0, END_OF_SEQUENCE /* end of sequence */
};
#define SKIP 0xaa
/* page 4 - the value SKIP says skip the index - see reg_w_page() */
static const __u8 page4_7311[] = {
SKIP, SKIP, 0x04, 0x54, 0x07, 0x2b, 0x09, 0x0f,
0x09, 0x00, SKIP, SKIP, 0x07, 0x00, 0x00, 0x62,
0x08, SKIP, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0xa0, 0x01, 0xf4, SKIP,
SKIP, 0x00, 0x08, SKIP, 0x03, SKIP, 0x00, 0x68,
0xca, 0x10, 0x06, 0x78, 0x00, 0x00, 0x00, 0x00,
0x23, 0x28, 0x04, 0x11, 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
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