1 /* 2 * ths7303/53- THS7303/53 Video Amplifier driver 3 * 4 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ 5 * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. 6 * 7 * Author: Chaithrika U S <chaithrika@ti.com> 8 * 9 * Contributors: 10 * Hans Verkuil <hans.verkuil@cisco.com> 11 * Lad, Prabhakar <prabhakar.lad@ti.com> 12 * Martin Bugge <marbugge@cisco.com> 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation version 2. 17 * 18 * This program is distributed .as is. WITHOUT ANY WARRANTY of any 19 * kind, whether express or implied; without even the implied warranty 20 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 */ 23 24 #include <linux/i2c.h> 25 #include <linux/module.h> 26 #include <linux/slab.h> 27 28 #include <media/i2c/ths7303.h> 29 #include <media/v4l2-device.h> 30 31 #define THS7303_CHANNEL_1 1 32 #define THS7303_CHANNEL_2 2 33 #define THS7303_CHANNEL_3 3 34 35 struct ths7303_state { 36 struct v4l2_subdev sd; 37 const struct ths7303_platform_data *pdata; 38 struct v4l2_bt_timings bt; 39 int std_id; 40 int stream_on; 41 }; 42 43 enum ths7303_filter_mode { 44 THS7303_FILTER_MODE_480I_576I, 45 THS7303_FILTER_MODE_480P_576P, 46 THS7303_FILTER_MODE_720P_1080I, 47 THS7303_FILTER_MODE_1080P, 48 THS7303_FILTER_MODE_DISABLE 49 }; 50 51 MODULE_DESCRIPTION("TI THS7303 video amplifier driver"); 52 MODULE_AUTHOR("Chaithrika U S"); 53 MODULE_LICENSE("GPL"); 54 55 static inline struct ths7303_state *to_state(struct v4l2_subdev *sd) 56 { 57 return container_of(sd, struct ths7303_state, sd); 58 } 59 60 static int ths7303_read(struct v4l2_subdev *sd, u8 reg) 61 { 62 struct i2c_client *client = v4l2_get_subdevdata(sd); 63 64 return i2c_smbus_read_byte_data(client, reg); 65 } 66 67 static int ths7303_write(struct v4l2_subdev *sd, u8 reg, u8 val) 68 { 69 struct i2c_client *client = v4l2_get_subdevdata(sd); 70 int ret; 71 int i; 72 73 for (i = 0; i < 3; i++) { 74 ret = i2c_smbus_write_byte_data(client, reg, val); 75 if (ret == 0) 76 return 0; 77 } 78 return ret; 79 } 80 81 /* following function is used to set ths7303 */ 82 static int ths7303_setval(struct v4l2_subdev *sd, 83 enum ths7303_filter_mode mode) 84 { 85 struct i2c_client *client = v4l2_get_subdevdata(sd); 86 struct ths7303_state *state = to_state(sd); 87 const struct ths7303_platform_data *pdata = state->pdata; 88 u8 val, sel = 0; 89 int err, disable = 0; 90 91 if (!client) 92 return -EINVAL; 93 94 switch (mode) { 95 case THS7303_FILTER_MODE_1080P: 96 sel = 0x3; /*1080p and SXGA/UXGA */ 97 break; 98 case THS7303_FILTER_MODE_720P_1080I: 99 sel = 0x2; /*720p, 1080i and SVGA/XGA */ 100 break; 101 case THS7303_FILTER_MODE_480P_576P: 102 sel = 0x1; /* EDTV 480p/576p and VGA */ 103 break; 104 case THS7303_FILTER_MODE_480I_576I: 105 sel = 0x0; /* SDTV, S-Video, 480i/576i */ 106 break; 107 default: 108 /* disable all channels */ 109 disable = 1; 110 } 111 112 val = (sel << 6) | (sel << 3); 113 if (!disable) 114 val |= (pdata->ch_1 & 0x27); 115 err = ths7303_write(sd, THS7303_CHANNEL_1, val); 116 if (err) 117 goto out; 118 119 val = (sel << 6) | (sel << 3); 120 if (!disable) 121 val |= (pdata->ch_2 & 0x27); 122 err = ths7303_write(sd, THS7303_CHANNEL_2, val); 123 if (err) 124 goto out; 125 126 val = (sel << 6) | (sel << 3); 127 if (!disable) 128 val |= (pdata->ch_3 & 0x27); 129 err = ths7303_write(sd, THS7303_CHANNEL_3, val); 130 if (err) 131 goto out; 132 133 return 0; 134 out: 135 pr_info("write byte data failed\n"); 136 return err; 137 } 138 139 static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm) 140 { 141 struct ths7303_state *state = to_state(sd); 142 143 if (norm & (V4L2_STD_ALL & ~V4L2_STD_SECAM)) { 144 state->std_id = 1; 145 state->bt.pixelclock = 0; 146 return ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I); 147 } 148 149 return ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE); 150 } 151 152 static int ths7303_config(struct v4l2_subdev *sd) 153 { 154 struct ths7303_state *state = to_state(sd); 155 int res; 156 157 if (!state->stream_on) { 158 ths7303_write(sd, THS7303_CHANNEL_1, 159 (ths7303_read(sd, THS7303_CHANNEL_1) & 0xf8) | 160 0x00); 161 ths7303_write(sd, THS7303_CHANNEL_2, 162 (ths7303_read(sd, THS7303_CHANNEL_2) & 0xf8) | 163 0x00); 164 ths7303_write(sd, THS7303_CHANNEL_3, 165 (ths7303_read(sd, THS7303_CHANNEL_3) & 0xf8) | 166 0x00); 167 return 0; 168 } 169 170 if (state->bt.pixelclock > 120000000) 171 res = ths7303_setval(sd, THS7303_FILTER_MODE_1080P); 172 else if (state->bt.pixelclock > 70000000) 173 res = ths7303_setval(sd, THS7303_FILTER_MODE_720P_1080I); 174 else if (state->bt.pixelclock > 20000000) 175 res = ths7303_setval(sd, THS7303_FILTER_MODE_480P_576P); 176 else if (state->std_id) 177 res = ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I); 178 else 179 /* disable all channels */ 180 res = ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE); 181 182 return res; 183 184 } 185 186 static int ths7303_s_stream(struct v4l2_subdev *sd, int enable) 187 { 188 struct ths7303_state *state = to_state(sd); 189 190 state->stream_on = enable; 191 192 return ths7303_config(sd); 193 } 194 195 /* for setting filter for HD output */ 196 static int ths7303_s_dv_timings(struct v4l2_subdev *sd, 197 struct v4l2_dv_timings *dv_timings) 198 { 199 struct ths7303_state *state = to_state(sd); 200 201 if (!dv_timings || dv_timings->type != V4L2_DV_BT_656_1120) 202 return -EINVAL; 203 204 state->bt = dv_timings->bt; 205 state->std_id = 0; 206 207 return ths7303_config(sd); 208 } 209 210 static const struct v4l2_subdev_video_ops ths7303_video_ops = { 211 .s_stream = ths7303_s_stream, 212 .s_std_output = ths7303_s_std_output, 213 .s_dv_timings = ths7303_s_dv_timings, 214 }; 215 216 #ifdef CONFIG_VIDEO_ADV_DEBUG 217 218 static int ths7303_g_register(struct v4l2_subdev *sd, 219 struct v4l2_dbg_register *reg) 220 { 221 reg->size = 1; 222 reg->val = ths7303_read(sd, reg->reg); 223 return 0; 224 } 225 226 static int ths7303_s_register(struct v4l2_subdev *sd, 227 const struct v4l2_dbg_register *reg) 228 { 229 ths7303_write(sd, reg->reg, reg->val); 230 return 0; 231 } 232 #endif 233 234 static const char * const stc_lpf_sel_txt[4] = { 235 "500-kHz Filter", 236 "2.5-MHz Filter", 237 "5-MHz Filter", 238 "5-MHz Filter", 239 }; 240 241 static const char * const in_mux_sel_txt[2] = { 242 "Input A Select", 243 "Input B Select", 244 }; 245 246 static const char * const lpf_freq_sel_txt[4] = { 247 "9-MHz LPF", 248 "16-MHz LPF", 249 "35-MHz LPF", 250 "Bypass LPF", 251 }; 252 253 static const char * const in_bias_sel_dis_cont_txt[8] = { 254 "Disable Channel", 255 "Mute Function - No Output", 256 "DC Bias Select", 257 "DC Bias + 250 mV Offset Select", 258 "AC Bias Select", 259 "Sync Tip Clamp with low bias", 260 "Sync Tip Clamp with mid bias", 261 "Sync Tip Clamp with high bias", 262 }; 263 264 static void ths7303_log_channel_status(struct v4l2_subdev *sd, u8 reg) 265 { 266 u8 val = ths7303_read(sd, reg); 267 268 if ((val & 0x7) == 0) { 269 v4l2_info(sd, "Channel %d Off\n", reg); 270 return; 271 } 272 273 v4l2_info(sd, "Channel %d On\n", reg); 274 v4l2_info(sd, " value 0x%x\n", val); 275 v4l2_info(sd, " %s\n", stc_lpf_sel_txt[(val >> 6) & 0x3]); 276 v4l2_info(sd, " %s\n", in_mux_sel_txt[(val >> 5) & 0x1]); 277 v4l2_info(sd, " %s\n", lpf_freq_sel_txt[(val >> 3) & 0x3]); 278 v4l2_info(sd, " %s\n", in_bias_sel_dis_cont_txt[(val >> 0) & 0x7]); 279 } 280 281 static int ths7303_log_status(struct v4l2_subdev *sd) 282 { 283 struct ths7303_state *state = to_state(sd); 284 285 v4l2_info(sd, "stream %s\n", state->stream_on ? "On" : "Off"); 286 287 if (state->bt.pixelclock) { 288 struct v4l2_bt_timings *bt = &state->bt; 289 u32 frame_width, frame_height; 290 291 frame_width = V4L2_DV_BT_FRAME_WIDTH(bt); 292 frame_height = V4L2_DV_BT_FRAME_HEIGHT(bt); 293 v4l2_info(sd, 294 "timings: %dx%d%s%d (%dx%d). Pix freq. = %d Hz. Polarities = 0x%x\n", 295 bt->width, bt->height, bt->interlaced ? "i" : "p", 296 (frame_height * frame_width) > 0 ? 297 (int)bt->pixelclock / 298 (frame_height * frame_width) : 0, 299 frame_width, frame_height, 300 (int)bt->pixelclock, bt->polarities); 301 } else { 302 v4l2_info(sd, "no timings set\n"); 303 } 304 305 ths7303_log_channel_status(sd, THS7303_CHANNEL_1); 306 ths7303_log_channel_status(sd, THS7303_CHANNEL_2); 307 ths7303_log_channel_status(sd, THS7303_CHANNEL_3); 308 309 return 0; 310 } 311 312 static const struct v4l2_subdev_core_ops ths7303_core_ops = { 313 .log_status = ths7303_log_status, 314 #ifdef CONFIG_VIDEO_ADV_DEBUG 315 .g_register = ths7303_g_register, 316 .s_register = ths7303_s_register, 317 #endif 318 }; 319 320 static const struct v4l2_subdev_ops ths7303_ops = { 321 .core = &ths7303_core_ops, 322 .video = &ths7303_video_ops, 323 }; 324 325 static int ths7303_probe(struct i2c_client *client) 326 { 327 struct ths7303_platform_data *pdata = client->dev.platform_data; 328 struct ths7303_state *state; 329 struct v4l2_subdev *sd; 330 331 if (pdata == NULL) { 332 dev_err(&client->dev, "No platform data\n"); 333 return -EINVAL; 334 } 335 336 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 337 return -ENODEV; 338 339 v4l_info(client, "chip found @ 0x%x (%s)\n", 340 client->addr << 1, client->adapter->name); 341 342 state = devm_kzalloc(&client->dev, sizeof(struct ths7303_state), 343 GFP_KERNEL); 344 if (!state) 345 return -ENOMEM; 346 347 state->pdata = pdata; 348 sd = &state->sd; 349 v4l2_i2c_subdev_init(sd, client, &ths7303_ops); 350 351 /* set to default 480I_576I filter mode */ 352 if (ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I) < 0) { 353 v4l_err(client, "Setting to 480I_576I filter mode failed!\n"); 354 return -EINVAL; 355 } 356 357 return 0; 358 } 359 360 static void ths7303_remove(struct i2c_client *client) 361 { 362 struct v4l2_subdev *sd = i2c_get_clientdata(client); 363 364 v4l2_device_unregister_subdev(sd); 365 } 366 367 static const struct i2c_device_id ths7303_id[] = { 368 {"ths7303", 0}, 369 {"ths7353", 0}, 370 {}, 371 }; 372 373 MODULE_DEVICE_TABLE(i2c, ths7303_id); 374 375 static struct i2c_driver ths7303_driver = { 376 .driver = { 377 .name = "ths73x3", 378 }, 379 .probe = ths7303_probe, 380 .remove = ths7303_remove, 381 .id_table = ths7303_id, 382 }; 383 384 module_i2c_driver(ths7303_driver); 385