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linux/drivers/media/video/sn9c102/sn9c102_pas106b.c
Hans Verkuil d45b9b8ab4 V4L/DVB (8906): v4l-dvb: fix assorted sparse warnings 
Fix sparse warnings. None are serious, but cutting down on these helps find
future serious sparse warnings/errors.

Redid the av7710.c patch based on a suggestion by Oliver Endriss.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-10-12 09:36:58 -02:00

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/***************************************************************************
* Plug-in for PAS106B image sensor connected to the SN9C1xx PC Camera *
* Controllers *
* *
* Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* 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/delay.h>
#include "sn9c102_sensor.h"
#include "sn9c102_devtable.h"
static int pas106b_init(struct sn9c102_device* cam)
{
int err = 0;
err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
{0x00, 0x14}, {0x20, 0x17},
{0x20, 0x19}, {0x09, 0x18});
err += sn9c102_i2c_write(cam, 0x02, 0x0c);
err += sn9c102_i2c_write(cam, 0x05, 0x5a);
err += sn9c102_i2c_write(cam, 0x06, 0x88);
err += sn9c102_i2c_write(cam, 0x07, 0x80);
err += sn9c102_i2c_write(cam, 0x10, 0x06);
err += sn9c102_i2c_write(cam, 0x11, 0x06);
err += sn9c102_i2c_write(cam, 0x12, 0x00);
err += sn9c102_i2c_write(cam, 0x14, 0x02);
err += sn9c102_i2c_write(cam, 0x13, 0x01);
msleep(400);
return err;
}
static int pas106b_get_ctrl(struct sn9c102_device* cam,
struct v4l2_control* ctrl)
{
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
{
int r1 = sn9c102_i2c_read(cam, 0x03),
r2 = sn9c102_i2c_read(cam, 0x04);
if (r1 < 0 || r2 < 0)
return -EIO;
ctrl->value = (r1 << 4) | (r2 & 0x0f);
}
return 0;
case V4L2_CID_RED_BALANCE:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
return -EIO;
ctrl->value &= 0x1f;
return 0;
case V4L2_CID_BLUE_BALANCE:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
return -EIO;
ctrl->value &= 0x1f;
return 0;
case V4L2_CID_GAIN:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
return -EIO;
ctrl->value &= 0x1f;
return 0;
case V4L2_CID_CONTRAST:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
return -EIO;
ctrl->value &= 0x07;
return 0;
case SN9C102_V4L2_CID_GREEN_BALANCE:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
return -EIO;
ctrl->value = (ctrl->value & 0x1f) << 1;
return 0;
case SN9C102_V4L2_CID_DAC_MAGNITUDE:
if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
return -EIO;
ctrl->value &= 0xf8;
return 0;
default:
return -EINVAL;
}
}
static int pas106b_set_ctrl(struct sn9c102_device* cam,
const struct v4l2_control* ctrl)
{
int err = 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
break;
case V4L2_CID_RED_BALANCE:
err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
break;
case V4L2_CID_BLUE_BALANCE:
err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
break;
case V4L2_CID_GAIN:
err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
break;
case V4L2_CID_CONTRAST:
err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
break;
case SN9C102_V4L2_CID_GREEN_BALANCE:
err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
break;
case SN9C102_V4L2_CID_DAC_MAGNITUDE:
err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
break;
default:
return -EINVAL;
}
err += sn9c102_i2c_write(cam, 0x13, 0x01);
return err ? -EIO : 0;
}
static int pas106b_set_crop(struct sn9c102_device* cam,
const struct v4l2_rect* rect)
{
struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
int err = 0;
u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
err += sn9c102_write_reg(cam, h_start, 0x12);
err += sn9c102_write_reg(cam, v_start, 0x13);
return err;
}
static int pas106b_set_pix_format(struct sn9c102_device* cam,
const struct v4l2_pix_format* pix)
{
int err = 0;
if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
err += sn9c102_write_reg(cam, 0x2c, 0x17);
else
err += sn9c102_write_reg(cam, 0x20, 0x17);
return err;
}
static const struct sn9c102_sensor pas106b = {
.name = "PAS106B",
.maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
.supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
.sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
.frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
.interface = SN9C102_I2C_2WIRES,
.i2c_slave_id = 0x40,
.init = &pas106b_init,
.qctrl = {
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "exposure",
.minimum = 0x125,
.maximum = 0xfff,
.step = 0x001,
.default_value = 0x140,
.flags = 0,
},
{
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "global gain",
.minimum = 0x00,
.maximum = 0x1f,
.step = 0x01,
.default_value = 0x0d,
.flags = 0,
},
{
.id = V4L2_CID_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "contrast",
.minimum = 0x00,
.maximum = 0x07,
.step = 0x01,
.default_value = 0x00, /* 0x00~0x03 have same effect */
.flags = 0,
},
{
.id = V4L2_CID_RED_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "red balance",
.minimum = 0x00,
.maximum = 0x1f,
.step = 0x01,
.default_value = 0x04,
.flags = 0,
},
{
.id = V4L2_CID_BLUE_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "blue balance",
.minimum = 0x00,
.maximum = 0x1f,
.step = 0x01,
.default_value = 0x06,
.flags = 0,
},
{
.id = SN9C102_V4L2_CID_GREEN_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "green balance",
.minimum = 0x00,
.maximum = 0x3e,
.step = 0x02,
.default_value = 0x02,
.flags = 0,
},
{
.id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "DAC magnitude",
.minimum = 0x00,
.maximum = 0x1f,
.step = 0x01,
.default_value = 0x01,
.flags = 0,
},
},
.get_ctrl = &pas106b_get_ctrl,
.set_ctrl = &pas106b_set_ctrl,
.cropcap = {
.bounds = {
.left = 0,
.top = 0,
.width = 352,
.height = 288,
},
.defrect = {
.left = 0,
.top = 0,
.width = 352,
.height = 288,
},
},
.set_crop = &pas106b_set_crop,
.pix_format = {
.width = 352,
.height = 288,
.pixelformat = V4L2_PIX_FMT_SBGGR8,
.priv = 8, /* we use this field as 'bits per pixel' */
},
.set_pix_format = &pas106b_set_pix_format
};
int sn9c102_probe_pas106b(struct sn9c102_device* cam)
{
int r0 = 0, r1 = 0;
unsigned int pid = 0;
/*
Minimal initialization to enable the I2C communication
NOTE: do NOT change the values!
*/
if (sn9c102_write_const_regs(cam,
{0x01, 0x01}, /* sensor power down */
{0x00, 0x01}, /* sensor power on */
{0x28, 0x17})) /* sensor clock at 24 MHz */
return -EIO;
r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
if (r0 < 0 || r1 < 0)
return -EIO;
pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
if (pid != 0x007)
return -ENODEV;
sn9c102_attach_sensor(cam, &pas106b);
return 0;
}
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