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/*
em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices
Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org>
Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/i2c.h>
#include <media/mt9v011.h>
#include <media/v4l2-common.h>
#include "em28xx.h"
/* FIXME: Should be replaced by a proper mt9m111 driver */
static int em28xx_initialize_mt9m111(struct em28xx *dev)
{
int i;
unsigned char regs[][3] = {
{ 0x0d, 0x00, 0x01, }, /* reset and use defaults */
{ 0x0d, 0x00, 0x00, },
{ 0x0a, 0x00, 0x21, },
{ 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */
};
for (i = 0; i < ARRAY_SIZE(regs); i++)
i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
®s[i][0], 3);
return 0;
}
/* FIXME: Should be replaced by a proper mt9m001 driver */
static int em28xx_initialize_mt9m001(struct em28xx *dev)
{
int i;
unsigned char regs[][3] = {
{ 0x0d, 0x00, 0x01, },
{ 0x0d, 0x00, 0x00, },
{ 0x04, 0x05, 0x00, }, /* hres = 1280 */
{ 0x03, 0x04, 0x00, }, /* vres = 1024 */
{ 0x20, 0x11, 0x00, },
{ 0x06, 0x00, 0x10, },
{ 0x2b, 0x00, 0x24, },
{ 0x2e, 0x00, 0x24, },
{ 0x35, 0x00, 0x24, },
{ 0x2d, 0x00, 0x20, },
{ 0x2c, 0x00, 0x20, },
{ 0x09, 0x0a, 0xd4, },
{ 0x35, 0x00, 0x57, },
};
for (i = 0; i < ARRAY_SIZE(regs); i++)
i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
®s[i][0], 3);
return 0;
}
/*
* This method works for webcams with Micron sensors
*/
int em28xx_detect_sensor(struct em28xx *dev)
{
int ret;
char *name;
u8 reg;
__be16 id_be;
u16 id;
/* Micron sensor detection */
dev->i2c_client[dev->def_i2c_bus].addr = 0xba >> 1;
reg = 0;
i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], ®, 1);
ret = i2c_master_recv(&dev->i2c_client[dev->def_i2c_bus],
(char *)&id_be, 2);
if (ret != 2)
return -EINVAL;
id = be16_to_cpu(id_be);
switch (id) {
case 0x8232: /* mt9v011 640x480 1.3 Mpix sensor */
case 0x8243: /* mt9v011 rev B 640x480 1.3 Mpix sensor */
name = "mt9v011";
dev->em28xx_sensor = EM28XX_MT9V011;
break;
case 0x143a: /* MT9M111 as found in the ECS G200 */
name = "mt9m111";
dev->em28xx_sensor = EM28XX_MT9M111;
break;
case 0x8431:
name = "mt9m001";
dev->em28xx_sensor = EM28XX_MT9M001;
break;
default:
em28xx_info("unknown Micron sensor detected: 0x%04x\n", id);
return -EINVAL;
}
em28xx_info("sensor %s detected\n", name);
return 0;
}
int em28xx_init_camera(struct em28xx *dev)
{
switch (dev->em28xx_sensor) {
case EM28XX_MT9V011:
{
struct mt9v011_platform_data pdata;
struct i2c_board_info mt9v011_info = {
.type = "mt9v011",
.addr = dev->i2c_client[dev->def_i2c_bus].addr,
.platform_data = &pdata,
};
dev->sensor_xres = 640;
dev->sensor_yres = 480;
/*
* FIXME: mt9v011 uses I2S speed as xtal clk - at least with
* the Silvercrest cam I have here for testing - for higher
* resolutions, a high clock cause horizontal artifacts, so we
* need to use a lower xclk frequency.
* Yet, it would be possible to adjust xclk depending on the
* desired resolution, since this affects directly the
* frame rate.
*/
dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
dev->sensor_xtal = 4300000;
pdata.xtal = dev->sensor_xtal;
if (NULL ==
v4l2_i2c_new_subdev_board(&dev->v4l2_dev,
&dev->i2c_adap[dev->def_i2c_bus],
&mt9v011_info, NULL))
return -ENODEV;
/* probably means GRGB 16 bit bayer */
dev->vinmode = 0x0d;
dev->vinctl = 0x00;
break;
}
case EM28XX_MT9M001:
dev->sensor_xres = 1280;
dev->sensor_yres = 1024;
em28xx_initialize_mt9m001(dev);
/* probably means BGGR 16 bit bayer */
dev->vinmode = 0x0c;
dev->vinctl = 0x00;
break;
case EM28XX_MT9M111:
dev->sensor_xres = 640;
dev->sensor_yres = 512;
dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
em28xx_initialize_mt9m111(dev);
dev->vinmode = 0x0a;
dev->vinctl = 0x00;
break;
case EM28XX_NOSENSOR:
default:
return -EINVAL;
}
return 0;
}
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