1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * OKI Semiconductor ML86V7667 video decoder driver 4 * 5 * Author: Vladimir Barinov <source@cogentembedded.com> 6 * Copyright (C) 2013 Cogent Embedded, Inc. 7 * Copyright (C) 2013 Renesas Solutions Corp. 8 */ 9 10 #include <linux/init.h> 11 #include <linux/module.h> 12 #include <linux/i2c.h> 13 #include <linux/slab.h> 14 #include <linux/videodev2.h> 15 #include <media/v4l2-subdev.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-ioctl.h> 18 #include <media/v4l2-ctrls.h> 19 20 #define DRV_NAME "ml86v7667" 21 22 /* Subaddresses */ 23 #define MRA_REG 0x00 /* Mode Register A */ 24 #define MRC_REG 0x02 /* Mode Register C */ 25 #define LUMC_REG 0x0C /* Luminance Control */ 26 #define CLC_REG 0x10 /* Contrast level control */ 27 #define SSEPL_REG 0x11 /* Sync separation level */ 28 #define CHRCA_REG 0x12 /* Chrominance Control A */ 29 #define ACCC_REG 0x14 /* ACC Loop filter & Chrominance control */ 30 #define ACCRC_REG 0x15 /* ACC Reference level control */ 31 #define HUE_REG 0x16 /* Hue control */ 32 #define ADC2_REG 0x1F /* ADC Register 2 */ 33 #define PLLR1_REG 0x20 /* PLL Register 1 */ 34 #define STATUS_REG 0x2C /* STATUS Register */ 35 36 /* Mode Register A register bits */ 37 #define MRA_OUTPUT_MODE_MASK (3 << 6) 38 #define MRA_ITUR_BT601 (1 << 6) 39 #define MRA_ITUR_BT656 (0 << 6) 40 #define MRA_INPUT_MODE_MASK (7 << 3) 41 #define MRA_PAL_BT601 (4 << 3) 42 #define MRA_NTSC_BT601 (0 << 3) 43 #define MRA_REGISTER_MODE (1 << 0) 44 45 /* Mode Register C register bits */ 46 #define MRC_AUTOSELECT (1 << 7) 47 48 /* Luminance Control register bits */ 49 #define LUMC_ONOFF_SHIFT 7 50 #define LUMC_ONOFF_MASK (1 << 7) 51 52 /* Contrast level control register bits */ 53 #define CLC_CONTRAST_ONOFF (1 << 7) 54 #define CLC_CONTRAST_MASK 0x0F 55 56 /* Sync separation level register bits */ 57 #define SSEPL_LUMINANCE_ONOFF (1 << 7) 58 #define SSEPL_LUMINANCE_MASK 0x7F 59 60 /* Chrominance Control A register bits */ 61 #define CHRCA_MODE_SHIFT 6 62 #define CHRCA_MODE_MASK (1 << 6) 63 64 /* ACC Loop filter & Chrominance control register bits */ 65 #define ACCC_CHROMA_CR_SHIFT 3 66 #define ACCC_CHROMA_CR_MASK (7 << 3) 67 #define ACCC_CHROMA_CB_SHIFT 0 68 #define ACCC_CHROMA_CB_MASK (7 << 0) 69 70 /* ACC Reference level control register bits */ 71 #define ACCRC_CHROMA_MASK 0xfc 72 #define ACCRC_CHROMA_SHIFT 2 73 74 /* ADC Register 2 register bits */ 75 #define ADC2_CLAMP_VOLTAGE_MASK (7 << 1) 76 #define ADC2_CLAMP_VOLTAGE(n) ((n & 7) << 1) 77 78 /* PLL Register 1 register bits */ 79 #define PLLR1_FIXED_CLOCK (1 << 7) 80 81 /* STATUS Register register bits */ 82 #define STATUS_HLOCK_DETECT (1 << 3) 83 #define STATUS_NTSCPAL (1 << 2) 84 85 struct ml86v7667_priv { 86 struct v4l2_subdev sd; 87 struct v4l2_ctrl_handler hdl; 88 v4l2_std_id std; 89 }; 90 91 static inline struct ml86v7667_priv *to_ml86v7667(struct v4l2_subdev *subdev) 92 { 93 return container_of(subdev, struct ml86v7667_priv, sd); 94 } 95 96 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 97 { 98 return &container_of(ctrl->handler, struct ml86v7667_priv, hdl)->sd; 99 } 100 101 static int ml86v7667_mask_set(struct i2c_client *client, const u8 reg, 102 const u8 mask, const u8 data) 103 { 104 int val = i2c_smbus_read_byte_data(client, reg); 105 if (val < 0) 106 return val; 107 108 val = (val & ~mask) | (data & mask); 109 return i2c_smbus_write_byte_data(client, reg, val); 110 } 111 112 static int ml86v7667_s_ctrl(struct v4l2_ctrl *ctrl) 113 { 114 struct v4l2_subdev *sd = to_sd(ctrl); 115 struct i2c_client *client = v4l2_get_subdevdata(sd); 116 int ret = -EINVAL; 117 118 switch (ctrl->id) { 119 case V4L2_CID_BRIGHTNESS: 120 ret = ml86v7667_mask_set(client, SSEPL_REG, 121 SSEPL_LUMINANCE_MASK, ctrl->val); 122 break; 123 case V4L2_CID_CONTRAST: 124 ret = ml86v7667_mask_set(client, CLC_REG, 125 CLC_CONTRAST_MASK, ctrl->val); 126 break; 127 case V4L2_CID_CHROMA_GAIN: 128 ret = ml86v7667_mask_set(client, ACCRC_REG, ACCRC_CHROMA_MASK, 129 ctrl->val << ACCRC_CHROMA_SHIFT); 130 break; 131 case V4L2_CID_HUE: 132 ret = ml86v7667_mask_set(client, HUE_REG, ~0, ctrl->val); 133 break; 134 case V4L2_CID_RED_BALANCE: 135 ret = ml86v7667_mask_set(client, ACCC_REG, 136 ACCC_CHROMA_CR_MASK, 137 ctrl->val << ACCC_CHROMA_CR_SHIFT); 138 break; 139 case V4L2_CID_BLUE_BALANCE: 140 ret = ml86v7667_mask_set(client, ACCC_REG, 141 ACCC_CHROMA_CB_MASK, 142 ctrl->val << ACCC_CHROMA_CB_SHIFT); 143 break; 144 case V4L2_CID_SHARPNESS: 145 ret = ml86v7667_mask_set(client, LUMC_REG, 146 LUMC_ONOFF_MASK, 147 ctrl->val << LUMC_ONOFF_SHIFT); 148 break; 149 case V4L2_CID_COLOR_KILLER: 150 ret = ml86v7667_mask_set(client, CHRCA_REG, 151 CHRCA_MODE_MASK, 152 ctrl->val << CHRCA_MODE_SHIFT); 153 break; 154 } 155 156 return ret; 157 } 158 159 static int ml86v7667_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) 160 { 161 struct i2c_client *client = v4l2_get_subdevdata(sd); 162 int status; 163 164 status = i2c_smbus_read_byte_data(client, STATUS_REG); 165 if (status < 0) 166 return status; 167 168 if (status & STATUS_HLOCK_DETECT) 169 *std &= status & STATUS_NTSCPAL ? V4L2_STD_625_50 : V4L2_STD_525_60; 170 else 171 *std = V4L2_STD_UNKNOWN; 172 173 return 0; 174 } 175 176 static int ml86v7667_g_input_status(struct v4l2_subdev *sd, u32 *status) 177 { 178 struct i2c_client *client = v4l2_get_subdevdata(sd); 179 int status_reg; 180 181 status_reg = i2c_smbus_read_byte_data(client, STATUS_REG); 182 if (status_reg < 0) 183 return status_reg; 184 185 *status = status_reg & STATUS_HLOCK_DETECT ? 0 : V4L2_IN_ST_NO_SIGNAL; 186 187 return 0; 188 } 189 190 static int ml86v7667_enum_mbus_code(struct v4l2_subdev *sd, 191 struct v4l2_subdev_state *sd_state, 192 struct v4l2_subdev_mbus_code_enum *code) 193 { 194 if (code->pad || code->index > 0) 195 return -EINVAL; 196 197 code->code = MEDIA_BUS_FMT_YUYV8_2X8; 198 199 return 0; 200 } 201 202 static int ml86v7667_fill_fmt(struct v4l2_subdev *sd, 203 struct v4l2_subdev_state *sd_state, 204 struct v4l2_subdev_format *format) 205 { 206 struct ml86v7667_priv *priv = to_ml86v7667(sd); 207 struct v4l2_mbus_framefmt *fmt = &format->format; 208 209 if (format->pad) 210 return -EINVAL; 211 212 fmt->code = MEDIA_BUS_FMT_YUYV8_2X8; 213 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; 214 /* The top field is always transferred first by the chip */ 215 fmt->field = V4L2_FIELD_INTERLACED_TB; 216 fmt->width = 720; 217 fmt->height = priv->std & V4L2_STD_525_60 ? 480 : 576; 218 219 return 0; 220 } 221 222 static int ml86v7667_get_mbus_config(struct v4l2_subdev *sd, 223 unsigned int pad, 224 struct v4l2_mbus_config *cfg) 225 { 226 cfg->type = V4L2_MBUS_BT656; 227 cfg->bus.parallel.flags = V4L2_MBUS_MASTER | 228 V4L2_MBUS_PCLK_SAMPLE_RISING | 229 V4L2_MBUS_DATA_ACTIVE_HIGH; 230 231 return 0; 232 } 233 234 static int ml86v7667_g_std(struct v4l2_subdev *sd, v4l2_std_id *std) 235 { 236 struct ml86v7667_priv *priv = to_ml86v7667(sd); 237 238 *std = priv->std; 239 240 return 0; 241 } 242 243 static int ml86v7667_s_std(struct v4l2_subdev *sd, v4l2_std_id std) 244 { 245 struct ml86v7667_priv *priv = to_ml86v7667(sd); 246 struct i2c_client *client = v4l2_get_subdevdata(&priv->sd); 247 int ret; 248 u8 mode; 249 250 /* PAL/NTSC ITU-R BT.601 input mode */ 251 mode = std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601; 252 ret = ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, mode); 253 if (ret < 0) 254 return ret; 255 256 priv->std = std; 257 258 return 0; 259 } 260 261 #ifdef CONFIG_VIDEO_ADV_DEBUG 262 static int ml86v7667_g_register(struct v4l2_subdev *sd, 263 struct v4l2_dbg_register *reg) 264 { 265 struct i2c_client *client = v4l2_get_subdevdata(sd); 266 int ret; 267 268 ret = i2c_smbus_read_byte_data(client, (u8)reg->reg); 269 if (ret < 0) 270 return ret; 271 272 reg->val = ret; 273 reg->size = sizeof(u8); 274 275 return 0; 276 } 277 278 static int ml86v7667_s_register(struct v4l2_subdev *sd, 279 const struct v4l2_dbg_register *reg) 280 { 281 struct i2c_client *client = v4l2_get_subdevdata(sd); 282 283 return i2c_smbus_write_byte_data(client, (u8)reg->reg, (u8)reg->val); 284 } 285 #endif 286 287 static const struct v4l2_ctrl_ops ml86v7667_ctrl_ops = { 288 .s_ctrl = ml86v7667_s_ctrl, 289 }; 290 291 static const struct v4l2_subdev_video_ops ml86v7667_subdev_video_ops = { 292 .g_std = ml86v7667_g_std, 293 .s_std = ml86v7667_s_std, 294 .querystd = ml86v7667_querystd, 295 .g_input_status = ml86v7667_g_input_status, 296 }; 297 298 static const struct v4l2_subdev_pad_ops ml86v7667_subdev_pad_ops = { 299 .enum_mbus_code = ml86v7667_enum_mbus_code, 300 .get_fmt = ml86v7667_fill_fmt, 301 .set_fmt = ml86v7667_fill_fmt, 302 .get_mbus_config = ml86v7667_get_mbus_config, 303 }; 304 305 static const struct v4l2_subdev_core_ops ml86v7667_subdev_core_ops = { 306 #ifdef CONFIG_VIDEO_ADV_DEBUG 307 .g_register = ml86v7667_g_register, 308 .s_register = ml86v7667_s_register, 309 #endif 310 }; 311 312 static const struct v4l2_subdev_ops ml86v7667_subdev_ops = { 313 .core = &ml86v7667_subdev_core_ops, 314 .video = &ml86v7667_subdev_video_ops, 315 .pad = &ml86v7667_subdev_pad_ops, 316 }; 317 318 static int ml86v7667_init(struct ml86v7667_priv *priv) 319 { 320 struct i2c_client *client = v4l2_get_subdevdata(&priv->sd); 321 int val; 322 int ret; 323 324 /* BT.656-4 output mode, register mode */ 325 ret = ml86v7667_mask_set(client, MRA_REG, 326 MRA_OUTPUT_MODE_MASK | MRA_REGISTER_MODE, 327 MRA_ITUR_BT656 | MRA_REGISTER_MODE); 328 329 /* PLL circuit fixed clock, 32MHz */ 330 ret |= ml86v7667_mask_set(client, PLLR1_REG, PLLR1_FIXED_CLOCK, 331 PLLR1_FIXED_CLOCK); 332 333 /* ADC2 clamping voltage maximum */ 334 ret |= ml86v7667_mask_set(client, ADC2_REG, ADC2_CLAMP_VOLTAGE_MASK, 335 ADC2_CLAMP_VOLTAGE(7)); 336 337 /* enable luminance function */ 338 ret |= ml86v7667_mask_set(client, SSEPL_REG, SSEPL_LUMINANCE_ONOFF, 339 SSEPL_LUMINANCE_ONOFF); 340 341 /* enable contrast function */ 342 ret |= ml86v7667_mask_set(client, CLC_REG, CLC_CONTRAST_ONOFF, 0); 343 344 /* 345 * PAL/NTSC autodetection is enabled after reset, 346 * set the autodetected std in manual std mode and 347 * disable autodetection 348 */ 349 val = i2c_smbus_read_byte_data(client, STATUS_REG); 350 if (val < 0) 351 return val; 352 353 priv->std = val & STATUS_NTSCPAL ? V4L2_STD_625_50 : V4L2_STD_525_60; 354 ret |= ml86v7667_mask_set(client, MRC_REG, MRC_AUTOSELECT, 0); 355 356 val = priv->std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601; 357 ret |= ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, val); 358 359 return ret; 360 } 361 362 static int ml86v7667_probe(struct i2c_client *client) 363 { 364 struct ml86v7667_priv *priv; 365 int ret; 366 367 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 368 return -EIO; 369 370 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 371 if (!priv) 372 return -ENOMEM; 373 374 v4l2_i2c_subdev_init(&priv->sd, client, &ml86v7667_subdev_ops); 375 376 v4l2_ctrl_handler_init(&priv->hdl, 8); 377 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 378 V4L2_CID_BRIGHTNESS, -64, 63, 1, 0); 379 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 380 V4L2_CID_CONTRAST, -8, 7, 1, 0); 381 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 382 V4L2_CID_CHROMA_GAIN, -32, 31, 1, 0); 383 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 384 V4L2_CID_HUE, -128, 127, 1, 0); 385 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 386 V4L2_CID_RED_BALANCE, -4, 3, 1, 0); 387 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 388 V4L2_CID_BLUE_BALANCE, -4, 3, 1, 0); 389 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 390 V4L2_CID_SHARPNESS, 0, 1, 1, 0); 391 v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops, 392 V4L2_CID_COLOR_KILLER, 0, 1, 1, 0); 393 priv->sd.ctrl_handler = &priv->hdl; 394 395 ret = priv->hdl.error; 396 if (ret) 397 goto cleanup; 398 399 v4l2_ctrl_handler_setup(&priv->hdl); 400 401 ret = ml86v7667_init(priv); 402 if (ret) 403 goto cleanup; 404 405 v4l_info(client, "chip found @ 0x%02x (%s)\n", 406 client->addr, client->adapter->name); 407 return 0; 408 409 cleanup: 410 v4l2_ctrl_handler_free(&priv->hdl); 411 v4l2_device_unregister_subdev(&priv->sd); 412 v4l_err(client, "failed to probe @ 0x%02x (%s)\n", 413 client->addr, client->adapter->name); 414 return ret; 415 } 416 417 static void ml86v7667_remove(struct i2c_client *client) 418 { 419 struct v4l2_subdev *sd = i2c_get_clientdata(client); 420 struct ml86v7667_priv *priv = to_ml86v7667(sd); 421 422 v4l2_ctrl_handler_free(&priv->hdl); 423 v4l2_device_unregister_subdev(&priv->sd); 424 } 425 426 static const struct i2c_device_id ml86v7667_id[] = { 427 {DRV_NAME, 0}, 428 {}, 429 }; 430 MODULE_DEVICE_TABLE(i2c, ml86v7667_id); 431 432 static struct i2c_driver ml86v7667_i2c_driver = { 433 .driver = { 434 .name = DRV_NAME, 435 }, 436 .probe_new = ml86v7667_probe, 437 .remove = ml86v7667_remove, 438 .id_table = ml86v7667_id, 439 }; 440 441 module_i2c_driver(ml86v7667_i2c_driver); 442 443 MODULE_DESCRIPTION("OKI Semiconductor ML86V7667 video decoder driver"); 444 MODULE_AUTHOR("Vladimir Barinov"); 445 MODULE_LICENSE("GPL"); 446