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/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 int debug; 56 module_param(debug, int, 0644); 57 MODULE_PARM_DESC(debug, "Debug level 0-1"); 58 59 static inline struct ths7303_state *to_state(struct v4l2_subdev *sd) 60 { 61 return container_of(sd, struct ths7303_state, sd); 62 } 63 64 static int ths7303_read(struct v4l2_subdev *sd, u8 reg) 65 { 66 struct i2c_client *client = v4l2_get_subdevdata(sd); 67 68 return i2c_smbus_read_byte_data(client, reg); 69 } 70 71 static int ths7303_write(struct v4l2_subdev *sd, u8 reg, u8 val) 72 { 73 struct i2c_client *client = v4l2_get_subdevdata(sd); 74 int ret; 75 int i; 76 77 for (i = 0; i < 3; i++) { 78 ret = i2c_smbus_write_byte_data(client, reg, val); 79 if (ret == 0) 80 return 0; 81 } 82 return ret; 83 } 84 85 /* following function is used to set ths7303 */ 86 static int ths7303_setval(struct v4l2_subdev *sd, 87 enum ths7303_filter_mode mode) 88 { 89 struct i2c_client *client = v4l2_get_subdevdata(sd); 90 struct ths7303_state *state = to_state(sd); 91 const struct ths7303_platform_data *pdata = state->pdata; 92 u8 val, sel = 0; 93 int err, disable = 0; 94 95 if (!client) 96 return -EINVAL; 97 98 switch (mode) { 99 case THS7303_FILTER_MODE_1080P: 100 sel = 0x3; /*1080p and SXGA/UXGA */ 101 break; 102 case THS7303_FILTER_MODE_720P_1080I: 103 sel = 0x2; /*720p, 1080i and SVGA/XGA */ 104 break; 105 case THS7303_FILTER_MODE_480P_576P: 106 sel = 0x1; /* EDTV 480p/576p and VGA */ 107 break; 108 case THS7303_FILTER_MODE_480I_576I: 109 sel = 0x0; /* SDTV, S-Video, 480i/576i */ 110 break; 111 default: 112 /* disable all channels */ 113 disable = 1; 114 } 115 116 val = (sel << 6) | (sel << 3); 117 if (!disable) 118 val |= (pdata->ch_1 & 0x27); 119 err = ths7303_write(sd, THS7303_CHANNEL_1, val); 120 if (err) 121 goto out; 122 123 val = (sel << 6) | (sel << 3); 124 if (!disable) 125 val |= (pdata->ch_2 & 0x27); 126 err = ths7303_write(sd, THS7303_CHANNEL_2, val); 127 if (err) 128 goto out; 129 130 val = (sel << 6) | (sel << 3); 131 if (!disable) 132 val |= (pdata->ch_3 & 0x27); 133 err = ths7303_write(sd, THS7303_CHANNEL_3, val); 134 if (err) 135 goto out; 136 137 return 0; 138 out: 139 pr_info("write byte data failed\n"); 140 return err; 141 } 142 143 static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm) 144 { 145 struct ths7303_state *state = to_state(sd); 146 147 if (norm & (V4L2_STD_ALL & ~V4L2_STD_SECAM)) { 148 state->std_id = 1; 149 state->bt.pixelclock = 0; 150 return ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I); 151 } 152 153 return ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE); 154 } 155 156 static int ths7303_config(struct v4l2_subdev *sd) 157 { 158 struct ths7303_state *state = to_state(sd); 159 int res; 160 161 if (!state->stream_on) { 162 ths7303_write(sd, THS7303_CHANNEL_1, 163 (ths7303_read(sd, THS7303_CHANNEL_1) & 0xf8) | 164 0x00); 165 ths7303_write(sd, THS7303_CHANNEL_2, 166 (ths7303_read(sd, THS7303_CHANNEL_2) & 0xf8) | 167 0x00); 168 ths7303_write(sd, THS7303_CHANNEL_3, 169 (ths7303_read(sd, THS7303_CHANNEL_3) & 0xf8) | 170 0x00); 171 return 0; 172 } 173 174 if (state->bt.pixelclock > 120000000) 175 res = ths7303_setval(sd, THS7303_FILTER_MODE_1080P); 176 else if (state->bt.pixelclock > 70000000) 177 res = ths7303_setval(sd, THS7303_FILTER_MODE_720P_1080I); 178 else if (state->bt.pixelclock > 20000000) 179 res = ths7303_setval(sd, THS7303_FILTER_MODE_480P_576P); 180 else if (state->std_id) 181 res = ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I); 182 else 183 /* disable all channels */ 184 res = ths7303_setval(sd, THS7303_FILTER_MODE_DISABLE); 185 186 return res; 187 188 } 189 190 static int ths7303_s_stream(struct v4l2_subdev *sd, int enable) 191 { 192 struct ths7303_state *state = to_state(sd); 193 194 state->stream_on = enable; 195 196 return ths7303_config(sd); 197 } 198 199 /* for setting filter for HD output */ 200 static int ths7303_s_dv_timings(struct v4l2_subdev *sd, 201 struct v4l2_dv_timings *dv_timings) 202 { 203 struct ths7303_state *state = to_state(sd); 204 205 if (!dv_timings || dv_timings->type != V4L2_DV_BT_656_1120) 206 return -EINVAL; 207 208 state->bt = dv_timings->bt; 209 state->std_id = 0; 210 211 return ths7303_config(sd); 212 } 213 214 static const struct v4l2_subdev_video_ops ths7303_video_ops = { 215 .s_stream = ths7303_s_stream, 216 .s_std_output = ths7303_s_std_output, 217 .s_dv_timings = ths7303_s_dv_timings, 218 }; 219 220 #ifdef CONFIG_VIDEO_ADV_DEBUG 221 222 static int ths7303_g_register(struct v4l2_subdev *sd, 223 struct v4l2_dbg_register *reg) 224 { 225 reg->size = 1; 226 reg->val = ths7303_read(sd, reg->reg); 227 return 0; 228 } 229 230 static int ths7303_s_register(struct v4l2_subdev *sd, 231 const struct v4l2_dbg_register *reg) 232 { 233 ths7303_write(sd, reg->reg, reg->val); 234 return 0; 235 } 236 #endif 237 238 static const char * const stc_lpf_sel_txt[4] = { 239 "500-kHz Filter", 240 "2.5-MHz Filter", 241 "5-MHz Filter", 242 "5-MHz Filter", 243 }; 244 245 static const char * const in_mux_sel_txt[2] = { 246 "Input A Select", 247 "Input B Select", 248 }; 249 250 static const char * const lpf_freq_sel_txt[4] = { 251 "9-MHz LPF", 252 "16-MHz LPF", 253 "35-MHz LPF", 254 "Bypass LPF", 255 }; 256 257 static const char * const in_bias_sel_dis_cont_txt[8] = { 258 "Disable Channel", 259 "Mute Function - No Output", 260 "DC Bias Select", 261 "DC Bias + 250 mV Offset Select", 262 "AC Bias Select", 263 "Sync Tip Clamp with low bias", 264 "Sync Tip Clamp with mid bias", 265 "Sync Tip Clamp with high bias", 266 }; 267 268 static void ths7303_log_channel_status(struct v4l2_subdev *sd, u8 reg) 269 { 270 u8 val = ths7303_read(sd, reg); 271 272 if ((val & 0x7) == 0) { 273 v4l2_info(sd, "Channel %d Off\n", reg); 274 return; 275 } 276 277 v4l2_info(sd, "Channel %d On\n", reg); 278 v4l2_info(sd, " value 0x%x\n", val); 279 v4l2_info(sd, " %s\n", stc_lpf_sel_txt[(val >> 6) & 0x3]); 280 v4l2_info(sd, " %s\n", in_mux_sel_txt[(val >> 5) & 0x1]); 281 v4l2_info(sd, " %s\n", lpf_freq_sel_txt[(val >> 3) & 0x3]); 282 v4l2_info(sd, " %s\n", in_bias_sel_dis_cont_txt[(val >> 0) & 0x7]); 283 } 284 285 static int ths7303_log_status(struct v4l2_subdev *sd) 286 { 287 struct ths7303_state *state = to_state(sd); 288 289 v4l2_info(sd, "stream %s\n", state->stream_on ? "On" : "Off"); 290 291 if (state->bt.pixelclock) { 292 struct v4l2_bt_timings *bt = bt = &state->bt; 293 u32 frame_width, frame_height; 294 295 frame_width = V4L2_DV_BT_FRAME_WIDTH(bt); 296 frame_height = V4L2_DV_BT_FRAME_HEIGHT(bt); 297 v4l2_info(sd, 298 "timings: %dx%d%s%d (%dx%d). Pix freq. = %d Hz. Polarities = 0x%x\n", 299 bt->width, bt->height, bt->interlaced ? "i" : "p", 300 (frame_height * frame_width) > 0 ? 301 (int)bt->pixelclock / 302 (frame_height * frame_width) : 0, 303 frame_width, frame_height, 304 (int)bt->pixelclock, bt->polarities); 305 } else { 306 v4l2_info(sd, "no timings set\n"); 307 } 308 309 ths7303_log_channel_status(sd, THS7303_CHANNEL_1); 310 ths7303_log_channel_status(sd, THS7303_CHANNEL_2); 311 ths7303_log_channel_status(sd, THS7303_CHANNEL_3); 312 313 return 0; 314 } 315 316 static const struct v4l2_subdev_core_ops ths7303_core_ops = { 317 .log_status = ths7303_log_status, 318 #ifdef CONFIG_VIDEO_ADV_DEBUG 319 .g_register = ths7303_g_register, 320 .s_register = ths7303_s_register, 321 #endif 322 }; 323 324 static const struct v4l2_subdev_ops ths7303_ops = { 325 .core = &ths7303_core_ops, 326 .video = &ths7303_video_ops, 327 }; 328 329 static int ths7303_probe(struct i2c_client *client, 330 const struct i2c_device_id *id) 331 { 332 struct ths7303_platform_data *pdata = client->dev.platform_data; 333 struct ths7303_state *state; 334 struct v4l2_subdev *sd; 335 336 if (pdata == NULL) { 337 dev_err(&client->dev, "No platform data\n"); 338 return -EINVAL; 339 } 340 341 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 342 return -ENODEV; 343 344 v4l_info(client, "chip found @ 0x%x (%s)\n", 345 client->addr << 1, client->adapter->name); 346 347 state = devm_kzalloc(&client->dev, sizeof(struct ths7303_state), 348 GFP_KERNEL); 349 if (!state) 350 return -ENOMEM; 351 352 state->pdata = pdata; 353 sd = &state->sd; 354 v4l2_i2c_subdev_init(sd, client, &ths7303_ops); 355 356 /* set to default 480I_576I filter mode */ 357 if (ths7303_setval(sd, THS7303_FILTER_MODE_480I_576I) < 0) { 358 v4l_err(client, "Setting to 480I_576I filter mode failed!\n"); 359 return -EINVAL; 360 } 361 362 return 0; 363 } 364 365 static int ths7303_remove(struct i2c_client *client) 366 { 367 struct v4l2_subdev *sd = i2c_get_clientdata(client); 368 369 v4l2_device_unregister_subdev(sd); 370 371 return 0; 372 } 373 374 static const struct i2c_device_id ths7303_id[] = { 375 {"ths7303", 0}, 376 {"ths7353", 0}, 377 {}, 378 }; 379 380 MODULE_DEVICE_TABLE(i2c, ths7303_id); 381 382 static struct i2c_driver ths7303_driver = { 383 .driver = { 384 .owner = THIS_MODULE, 385 .name = "ths73x3", 386 }, 387 .probe = ths7303_probe, 388 .remove = ths7303_remove, 389 .id_table = ths7303_id, 390 }; 391 392 module_i2c_driver(ths7303_driver); 393