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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.
*
* 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.
When the register addresses differ between the 7202 and the 7311 the 2
different addresses are written as 7302addr/7311addr, when one of the 2
addresses is a - sign that register description is not valid for the
matching IC.
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 JPEG compression ratio ? Best not touched
Register page 3/4:
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/- Master gain 0-31
-/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
-/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 MODULE_NAME "pac7311"
#include <linux/input.h>
#include "gspca.h"
MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");
MODULE_DESCRIPTION("Pixart PAC7311");
MODULE_LICENSE("GPL");
/* specific webcam descriptor for pac7311 */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
unsigned char contrast;
unsigned char gain;
unsigned char exposure;
unsigned char autogain;
__u8 hflip;
__u8 vflip;
u8 sof_read;
u8 autogain_ignore_frames;
atomic_t avg_lum;
};
/* V4L2 controls supported by the driver */
static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getcontrast(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_sethflip(struct gspca_dev *gspca_dev, __s32 val);
static int sd_gethflip(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setvflip(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getvflip(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 int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
static const struct ctrl sd_ctrls[] = {
/* This control is for both the 7302 and the 7311 */
{
{
.id = V4L2_CID_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.minimum = 0,
#define CONTRAST_MAX 255
.maximum = CONTRAST_MAX,
.step = 1,
#define CONTRAST_DEF 127
.default_value = CONTRAST_DEF,
},
.set = sd_setcontrast,
.get = sd_getcontrast,
},
/* All controls below are for both the 7302 and the 7311 */
{
{
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Gain",
.minimum = 0,
#define GAIN_MAX 255
.maximum = GAIN_MAX,
.step = 1,
#define GAIN_DEF 127
#define GAIN_KNEE 255 /* Gain seems to cause little noise on the pac73xx */
.default_value = GAIN_DEF,
},
.set = sd_setgain,
.get = sd_getgain,
},
{
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Exposure",
.minimum = 0,
#define EXPOSURE_MAX 255
.maximum = EXPOSURE_MAX,
.step = 1,
#define EXPOSURE_DEF 16 /* 32 ms / 30 fps */
#define EXPOSURE_KNEE 50 /* 100 ms / 10 fps */
.default_value = EXPOSURE_DEF,
},
.set = sd_setexposure,
.get = sd_getexposure,
},
{
{
.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 = sd_setautogain,
.get = sd_getautogain,
},
{
{
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mirror",
.minimum = 0,
.maximum = 1,
.step = 1,
#define HFLIP_DEF 0
.default_value = HFLIP_DEF,
},
.set = sd_sethflip,
.get = sd_gethflip,
},
{
{
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Vflip",
.minimum = 0,
.maximum = 1,
.step = 1,
#define VFLIP_DEF 0
.default_value = VFLIP_DEF,
},
.set = sd_setvflip,
.get = sd_getvflip,
},
};
static const struct v4l2_pix_format vga_mode[] = {
{160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
.bytesperline = 160,
.sizeimage =
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