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kernel-fxtec-pro1x/drivers/media/video/saa7110.c
Roel Kluin f14a2972e4 V4L/DVB (13241): Cleanup redundant tests on unsigned 
The variables are unsigned so the test `>= 0' is always true,
the `< 0' test always fails. In these cases the other part of
the test catches wrapped values.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-05 18:41:04 -02:00

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/*
* saa7110 - Philips SAA7110(A) video decoder driver
*
* Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
*
* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
* - some corrections for Pinnacle Systems Inc. DC10plus card.
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (1/1/2003)
*
* 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/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>
MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
MODULE_AUTHOR("Pauline Middelink");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define SAA7110_MAX_INPUT 9 /* 6 CVBS, 3 SVHS */
#define SAA7110_MAX_OUTPUT 1 /* 1 YUV */
#define SAA7110_NR_REG 0x35
struct saa7110 {
struct v4l2_subdev sd;
u8 reg[SAA7110_NR_REG];
v4l2_std_id norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
wait_queue_head_t wq;
};
static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
{
return container_of(sd, struct saa7110, sd);
}
/* ----------------------------------------------------------------------- */
/* I2C support functions */
/* ----------------------------------------------------------------------- */
static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7110 *decoder = to_saa7110(sd);
decoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7110 *decoder = to_saa7110(sd);
int ret = -1;
u8 reg = *data; /* first register to write to */
/* Sanity check */
if (reg + (len - 1) > SAA7110_NR_REG)
return ret;
/* the saa7110 has an autoincrement function, use it if
* the adapter understands raw I2C */
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
ret = i2c_master_send(client, data, len);
/* Cache the written data */
memcpy(decoder->reg + reg, data + 1, len - 1);
} else {
for (++data, --len; len; len--) {
ret = saa7110_write(sd, reg++, *data++);
if (ret < 0)
break;
}
}
return ret;
}
static inline int saa7110_read(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte(client);
}
/* ----------------------------------------------------------------------- */
/* SAA7110 functions */
/* ----------------------------------------------------------------------- */
#define FRESP_06H_COMPST 0x03 /*0x13*/
#define FRESP_06H_SVIDEO 0x83 /*0xC0*/
static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
{
static const unsigned char modes[9][8] = {
/* mode 0 */
{FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
0x44, 0x75, 0x16},
/* mode 1 */
{FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
0x44, 0x75, 0x16},
/* mode 2 */
{FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
0x60, 0xB5, 0x05},
/* mode 3 */
{FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
0x60, 0xB5, 0x05},
/* mode 4 */
{FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
0x60, 0xB5, 0x03},
/* mode 5 */
{FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
0x60, 0xB5, 0x03},
/* mode 6 */
{FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
0x44, 0x75, 0x12},
/* mode 7 */
{FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
0x60, 0xB5, 0x14},
/* mode 8 */
{FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
0x44, 0x75, 0x21}
};
struct saa7110 *decoder = to_saa7110(sd);
const unsigned char *ptr = modes[chan];
saa7110_write(sd, 0x06, ptr[0]); /* Luminance control */
saa7110_write(sd, 0x20, ptr[1]); /* Analog Control #1 */
saa7110_write(sd, 0x21, ptr[2]); /* Analog Control #2 */
saa7110_write(sd, 0x22, ptr[3]); /* Mixer Control #1 */
saa7110_write(sd, 0x2C, ptr[4]); /* Mixer Control #2 */
saa7110_write(sd, 0x30, ptr[5]); /* ADCs gain control */
saa7110_write(sd, 0x31, ptr[6]); /* Mixer Control #3 */
saa7110_write(sd, 0x21, ptr[7]); /* Analog Control #2 */
decoder->input = chan;
return 0;
}
static const unsigned char initseq[1 + SAA7110_NR_REG] = {
0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
/* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
/* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
/* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
/* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
/* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
};
static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
{
DEFINE_WAIT(wait);
struct saa7110 *decoder = to_saa7110(sd);
int status;
/* mode changed, start automatic detection */
saa7110_write_block(sd, initseq, sizeof(initseq));
saa7110_selmux(sd, decoder->input);
prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
schedule_timeout(msecs_to_jiffies(250));
finish_wait(&decoder->wq, &wait);
status = saa7110_read(sd);
if (status & 0x40) {
v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
return decoder->norm; /* no change*/
}
if ((status & 3) == 0) {
saa7110_write(sd, 0x06, 0x83);
if (status & 0x20) {
v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
/*saa7110_write(sd,0x2E,0x81);*/
return V4L2_STD_NTSC;
}
v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
/*saa7110_write(sd,0x2E,0x9A);*/
return V4L2_STD_PAL;
}
/*saa7110_write(sd,0x06,0x03);*/
if (status & 0x20) { /* 60Hz */
v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
saa7110_write(sd, 0x0D, 0x86);
saa7110_write(sd, 0x0F, 0x50);
saa7110_write(sd, 0x11, 0x2C);
/*saa7110_write(sd,0x2E,0x81);*/
return V4L2_STD_NTSC;
}
/* 50Hz -> PAL/SECAM */
saa7110_write(sd, 0x0D, 0x86);
saa7110_write(sd, 0x0F, 0x10);
saa7110_write(sd, 0x11, 0x59);
/*saa7110_write(sd,0x2E,0x9A);*/
prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
schedule_timeout(msecs_to_jiffies(250));
finish_wait(&decoder->wq, &wait);
status = saa7110_read(sd);
if ((status & 0x03) == 0x01) {
v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
saa7110_write(sd, 0x0D, 0x87);
return V4L2_STD_SECAM;
}
v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
return V4L2_STD_PAL;
}
static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
{
struct saa7110 *decoder = to_saa7110(sd);
int res = V4L2_IN_ST_NO_SIGNAL;
int status = saa7110_read(sd);
v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
status, (unsigned long long)decoder->norm);
if (!(status & 0x40))
res = 0;
if (!(status & 0x03))
res |= V4L2_IN_ST_NO_COLOR;
*pstatus = res;
return 0;
}
static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
*(v4l2_std_id *)std = determine_norm(sd);
return 0;
}
static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct saa7110 *decoder = to_saa7110(sd);
if (decoder->norm != std) {
decoder->norm = std;
/*saa7110_write(sd, 0x06, 0x03);*/
if (std & V4L2_STD_NTSC) {
saa7110_write(sd, 0x0D, 0x86);
saa7110_write(sd, 0x0F, 0x50);
saa7110_write(sd, 0x11, 0x2C);
/*saa7110_write(sd, 0x2E, 0x81);*/
v4l2_dbg(1, debug, sd, "switched to NTSC\n");
} else if (std & V4L2_STD_PAL) {
saa7110_write(sd, 0x0D, 0x86);
saa7110_write(sd, 0x0F, 0x10);
saa7110_write(sd, 0x11, 0x59);
/*saa7110_write(sd, 0x2E, 0x9A);*/
v4l2_dbg(1, debug, sd, "switched to PAL\n");
} else if (std & V4L2_STD_SECAM) {
saa7110_write(sd, 0x0D, 0x87);
saa7110_write(sd, 0x0F, 0x10);
saa7110_write(sd, 0x11, 0x59);
/*saa7110_write(sd, 0x2E, 0x9A);*/
v4l2_dbg(1, debug, sd, "switched to SECAM\n");
} else {
return -EINVAL;
}
}
return 0;
}
static int saa7110_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct saa7110 *decoder = to_saa7110(sd);
if (input >= SAA7110_MAX_INPUT) {
v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
return -EINVAL;
}
if (decoder->input != input) {
saa7110_selmux(sd, input);
v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
}
return 0;
}
static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
{
struct saa7110 *decoder = to_saa7110(sd);
if (decoder->enable != enable) {
decoder->enable = enable;
saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
}
return 0;
}
static int saa7110_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
switch (qc->id) {
case V4L2_CID_BRIGHTNESS:
return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
case V4L2_CID_CONTRAST:
case V4L2_CID_SATURATION:
return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
case V4L2_CID_HUE:
return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
default:
return -EINVAL;
}
return 0;
}
static int saa7110_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct saa7110 *decoder = to_saa7110(sd);
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->value = decoder->bright;
break;
case V4L2_CID_CONTRAST:
ctrl->value = decoder->contrast;
break;
case V4L2_CID_SATURATION:
ctrl->value = decoder->sat;
break;
case V4L2_CID_HUE:
ctrl->value = decoder->hue;
break;
default:
return -EINVAL;
}
return 0;
}
static int saa7110_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct saa7110 *decoder = to_saa7110(sd);
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
if (decoder->bright != ctrl->value) {
decoder->bright = ctrl->value;
saa7110_write(sd, 0x19, decoder->bright);
}
break;
case V4L2_CID_CONTRAST:
if (decoder->contrast != ctrl->value) {
decoder->contrast = ctrl->value;
saa7110_write(sd, 0x13, decoder->contrast);
}
break;
case V4L2_CID_SATURATION:
if (decoder->sat != ctrl->value) {
decoder->sat = ctrl->value;
saa7110_write(sd, 0x12, decoder->sat);
}
break;
case V4L2_CID_HUE:
if (decoder->hue != ctrl->value) {
decoder->hue = ctrl->value;
saa7110_write(sd, 0x07, decoder->hue);
}
break;
default:
return -EINVAL;
}
return 0;
}
static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops saa7110_core_ops = {
.g_chip_ident = saa7110_g_chip_ident,
.g_ctrl = saa7110_g_ctrl,
.s_ctrl = saa7110_s_ctrl,
.queryctrl = saa7110_queryctrl,
.s_std = saa7110_s_std,
};
static const struct v4l2_subdev_video_ops saa7110_video_ops = {
.s_routing = saa7110_s_routing,
.s_stream = saa7110_s_stream,
.querystd = saa7110_querystd,
.g_input_status = saa7110_g_input_status,
};
static const struct v4l2_subdev_ops saa7110_ops = {
.core = &saa7110_core_ops,
.video = &saa7110_video_ops,
};
/* ----------------------------------------------------------------------- */
static int saa7110_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct saa7110 *decoder;
struct v4l2_subdev *sd;
int rv;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
if (!decoder)
return -ENOMEM;
sd = &decoder->sd;
v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
decoder->norm = V4L2_STD_PAL;
decoder->input = 0;
decoder->enable = 1;
decoder->bright = 32768;
decoder->contrast = 32768;
decoder->hue = 32768;
decoder->sat = 32768;
init_waitqueue_head(&decoder->wq);
rv = saa7110_write_block(sd, initseq, sizeof(initseq));
if (rv < 0) {
v4l2_dbg(1, debug, sd, "init status %d\n", rv);
} else {
int ver, status;
saa7110_write(sd, 0x21, 0x10);
saa7110_write(sd, 0x0e, 0x18);
saa7110_write(sd, 0x0D, 0x04);
ver = saa7110_read(sd);
saa7110_write(sd, 0x0D, 0x06);
/*mdelay(150);*/
status = saa7110_read(sd);
v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
ver, status);
saa7110_write(sd, 0x0D, 0x86);
saa7110_write(sd, 0x0F, 0x10);
saa7110_write(sd, 0x11, 0x59);
/*saa7110_write(sd, 0x2E, 0x9A);*/
}
/*saa7110_selmux(sd,0);*/
/*determine_norm(sd);*/
/* setup and implicit mode 0 select has been performed */
return 0;
}
static int saa7110_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
kfree(to_saa7110(sd));
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id saa7110_id[] = {
{ "saa7110", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, saa7110_id);
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "saa7110",
.probe = saa7110_probe,
.remove = saa7110_remove,
.id_table = saa7110_id,
};
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