diff options
Diffstat (limited to 'drivers/media/i2c/ths7303.c')
| -rw-r--r-- | drivers/media/i2c/ths7303.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c new file mode 100644 index 000000000..2a0f9a3d1 --- /dev/null +++ b/drivers/media/i2c/ths7303.c @@ -0,0 +1,385 @@ +/* + * 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/i2c/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 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 = &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 void ths7303_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + + v4l2_device_unregister_subdev(sd); +} + +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 = { + .name = "ths73x3", + }, + .probe = ths7303_probe, + .remove = ths7303_remove, + .id_table = ths7303_id, +}; + +module_i2c_driver(ths7303_driver); |