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linux-sg2042/drivers/media/i2c/ths7303.c

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/*
* ths7303/53- THS7303/53 Video Amplifier driver
*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
* Copyright 2013 Cisco Systems, Inc. and/or its affiliates.
*
* Author: Chaithrika U S <chaithrika@ti.com>
*
* Contributors:
* Hans Verkuil <hans.verkuil@cisco.com>
* Lad, Prabhakar <prabhakar.lad@ti.com>
* Martin Bugge <marbugge@cisco.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 version 2.
*
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <media/ths7303.h>
#include <media/v4l2-device.h>
#define THS7303_CHANNEL_1 1
#define THS7303_CHANNEL_2 2
#define THS7303_CHANNEL_3 3
struct ths7303_state {
struct v4l2_subdev sd;
const struct ths7303_platform_data *pdata;
struct v4l2_bt_timings bt;
int std_id;
int stream_on;
};
enum ths7303_filter_mode {
THS7303_FILTER_MODE_480I_576I,
THS7303_FILTER_MODE_480P_576P,
THS7303_FILTER_MODE_720P_1080I,
THS7303_FILTER_MODE_1080P,
THS7303_FILTER_MODE_DISABLE
};
MODULE_DESCRIPTION("TI THS7303 video amplifier driver");
MODULE_AUTHOR("Chaithrika U S");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level 0-1");
static inline struct ths7303_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct ths7303_state, sd);
}
static int ths7303_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte_data(client, reg);
}
static int ths7303_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
int i;
for (i = 0; i < 3; i++) {
ret = i2c_smbus_write_byte_data(client, reg, val);
if (ret == 0)
return 0;
}
return ret;
}
/* following function is used to set ths7303 */
static int ths7303_setval(struct v4l2_subdev *sd,
enum ths7303_filter_mode mode)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ths7303_state *state = to_state(sd);
const struct ths7303_platform_data *pdata = state->pdata;
u8 val, sel = 0;
int err, disable = 0;
if (!client)
return -EINVAL;
switch (mode) {
case THS7303_FILTER_MODE_1080P:
sel = 0x3; /*1080p and SXGA/UXGA */
break;
case THS7303_FILTER_MODE_720P_1080I:
sel = 0x2; /*720p, 1080i and SVGA/XGA */
break;
case THS7303_FILTER_MODE_480P_576P:
sel = 0x1; /* EDTV 480p/576p and VGA */
break;
case THS7303_FILTER_MODE_480I_576I:
sel = 0x0; /* SDTV, S-Video, 480i/576i */
break;
default:
/* disable all channels */
disable = 1;
}
val = (sel << 6) | (sel << 3);
if (!disable)
val |= (pdata->ch_1 & 0x27);
err = ths7303_write(sd, THS7303_CHANNEL_1, val);
if (err)
goto out;
val = (sel << 6) | (sel << 3);
if (!disable)
val |= (pdata->ch_2 & 0x27);
err = ths7303_write(sd, THS7303_CHANNEL_2, val);
if (err)
goto out;
val = (sel << 6) | (sel << 3);
if (!disable)
val |= (pdata->ch_3 & 0x27);
err = ths7303_write(sd, THS7303_CHANNEL_3, val);
if (err)
goto out;
return 0;
out:
pr_info("write byte data failed\n");
return err;
}
static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
{
struct ths7303_state *state = to_state(sd);
if (norm & (V4L2_STD_ALL & ~V4L2_STD_SECAM)) {
state->std_id = 1;
state->bt.pixelclock = 0;
return ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I);
}
return ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE);
}
static int ths7303_config(struct v4l2_subdev *sd)
{
struct ths7303_state *state = to_state(sd);
int res;
if (!state->stream_on) {
ths7303_write(sd, THS7303_CHANNEL_1,
(ths7303_read(sd, THS7303_CHANNEL_1) & 0xf8) |
0x00);
ths7303_write(sd, THS7303_CHANNEL_2,
(ths7303_read(sd, THS7303_CHANNEL_2) & 0xf8) |
0x00);
ths7303_write(sd, THS7303_CHANNEL_3,
(ths7303_read(sd, THS7303_CHANNEL_3) & 0xf8) |
0x00);
return 0;
}
if (state->bt.pixelclock > 120000000)
res = ths7303_setval(sd, THS7303_FILTER_MODE_1080P);
else if (state->bt.pixelclock > 70000000)
res = ths7303_setval(sd, THS7303_FILTER_MODE_720P_1080I);
else if (state->bt.pixelclock > 20000000)
res = ths7303_setval(sd, THS7303_FILTER_MODE_480P_576P);
else if (state->std_id)
res = ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I);
else
/* disable all channels */
res = ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE);
return res;
}
static int ths7303_s_stream(struct v4l2_subdev *sd, int enable)
{
struct ths7303_state *state = to_state(sd);
state->stream_on = enable;
return ths7303_config(sd);
}
/* for setting filter for HD output */
static int ths7303_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *dv_timings)
{
struct ths7303_state *state = to_state(sd);
if (!dv_timings || dv_timings->type != V4L2_DV_BT_656_1120)
return -EINVAL;
state->bt = dv_timings->bt;
state->std_id = 0;
return ths7303_config(sd);
}
static const struct v4l2_subdev_video_ops ths7303_video_ops = {
.s_stream = ths7303_s_stream,
.s_std_output = ths7303_s_std_output,
.s_dv_timings = ths7303_s_dv_timings,
};
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ths7303_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
reg->size = 1;
reg->val = ths7303_read(sd, reg->reg);
return 0;
}
static int ths7303_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
ths7303_write(sd, reg->reg, reg->val);
return 0;
}
#endif
static const char * const stc_lpf_sel_txt[4] = {
"500-kHz Filter",
"2.5-MHz Filter",
"5-MHz Filter",
"5-MHz Filter",
};
static const char * const in_mux_sel_txt[2] = {
"Input A Select",
"Input B Select",
};
static const char * const lpf_freq_sel_txt[4] = {
"9-MHz LPF",
"16-MHz LPF",
"35-MHz LPF",
"Bypass LPF",
};
static const char * const in_bias_sel_dis_cont_txt[8] = {
"Disable Channel",
"Mute Function - No Output",
"DC Bias Select",
"DC Bias + 250 mV Offset Select",
"AC Bias Select",
"Sync Tip Clamp with low bias",
"Sync Tip Clamp with mid bias",
"Sync Tip Clamp with high bias",
};
static void ths7303_log_channel_status(struct v4l2_subdev *sd, u8 reg)
{
u8 val = ths7303_read(sd, reg);
if ((val & 0x7) == 0) {
v4l2_info(sd, "Channel %d Off\n", reg);
return;
}
v4l2_info(sd, "Channel %d On\n", reg);
v4l2_info(sd, " value 0x%x\n", val);
v4l2_info(sd, " %s\n", stc_lpf_sel_txt[(val >> 6) & 0x3]);
v4l2_info(sd, " %s\n", in_mux_sel_txt[(val >> 5) & 0x1]);
v4l2_info(sd, " %s\n", lpf_freq_sel_txt[(val >> 3) & 0x3]);
v4l2_info(sd, " %s\n", in_bias_sel_dis_cont_txt[(val >> 0) & 0x7]);
}
static int ths7303_log_status(struct v4l2_subdev *sd)
{
struct ths7303_state *state = to_state(sd);
v4l2_info(sd, "stream %s\n", state->stream_on ? "On" : "Off");
if (state->bt.pixelclock) {
struct v4l2_bt_timings *bt = bt = &state->bt;
u32 frame_width, frame_height;
frame_width = V4L2_DV_BT_FRAME_WIDTH(bt);
frame_height = V4L2_DV_BT_FRAME_HEIGHT(bt);
v4l2_info(sd,
"timings: %dx%d%s%d (%dx%d). Pix freq. = %d Hz. Polarities = 0x%x\n",
bt->width, bt->height, bt->interlaced ? "i" : "p",
(frame_height * frame_width) > 0 ?
(int)bt->pixelclock /
(frame_height * frame_width) : 0,
frame_width, frame_height,
(int)bt->pixelclock, bt->polarities);
} else {
v4l2_info(sd, "no timings set\n");
}
ths7303_log_channel_status(sd, THS7303_CHANNEL_1);
ths7303_log_channel_status(sd, THS7303_CHANNEL_2);
ths7303_log_channel_status(sd, THS7303_CHANNEL_3);
return 0;
}
static const struct v4l2_subdev_core_ops ths7303_core_ops = {
.log_status = ths7303_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ths7303_g_register,
.s_register = ths7303_s_register,
#endif
};
static const struct v4l2_subdev_ops ths7303_ops = {
.core = &ths7303_core_ops,
.video = &ths7303_video_ops,
};
static int ths7303_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ths7303_platform_data *pdata = client->dev.platform_data;
struct ths7303_state *state;
struct v4l2_subdev *sd;
if (pdata == NULL) {
dev_err(&client->dev, "No platform data\n");
return -EINVAL;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = devm_kzalloc(&client->dev, sizeof(struct ths7303_state),
GFP_KERNEL);
if (!state)
return -ENOMEM;
state->pdata = pdata;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &ths7303_ops);
/* set to default 480I_576I filter mode */
if (ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I) < 0) {
v4l_err(client, "Setting to 480I_576I filter mode failed!\n");
return -EINVAL;
}
return 0;
}
static int ths7303_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
return 0;
}
static const struct i2c_device_id ths7303_id[] = {
{"ths7303", 0},
{"ths7353", 0},
{},
};
MODULE_DEVICE_TABLE(i2c, ths7303_id);
static struct i2c_driver ths7303_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "ths73x3",
},
.probe = ths7303_probe,
.remove = ths7303_remove,
.id_table = ths7303_id,
};
module_i2c_driver(ths7303_driver);
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