drivers/media/i2c/adv7170.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
   4  *
   5  * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
   6  *
   7  * Based on adv7176 driver by:
   8  *
   9  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
  10  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
  11  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
  12  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
  13  *
  14  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  15  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/types.h>
  20 #include <linux/slab.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/uaccess.h>
  23 #include <linux/i2c.h>
  24 #include <linux/videodev2.h>
  25 #include <media/v4l2-device.h>
  26
  27 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  28 MODULE_AUTHOR("Maxim Yevtyushkin");
  29 MODULE_LICENSE("GPL");
  30
  31
  32 static int debug;
  33 module_param(debug, int, 0);
  34 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  35
  36 /* ----------------------------------------------------------------------- */
  37
  38 struct adv7170 {
  39         struct v4l2_subdev sd;
  40         unsigned char reg[128];
  41
  42         v4l2_std_id norm;
  43         int input;
  44 };
  45
  46 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  47 {
  48         return container_of(sd, struct adv7170, sd);
  49 }
  50
  51 static char *inputs[] = { "pass_through", "play_back" };
  52
  53 static u32 adv7170_codes[] = {
  54         MEDIA_BUS_FMT_UYVY8_2X8,
  55         MEDIA_BUS_FMT_UYVY8_1X16,
  56 };
  57
  58 /* ----------------------------------------------------------------------- */
  59
  60 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  61 {
  62         struct i2c_client *client = v4l2_get_subdevdata(sd);
  63         struct adv7170 *encoder = to_adv7170(sd);
  64
  65         encoder->reg[reg] = value;
  66         return i2c_smbus_write_byte_data(client, reg, value);
  67 }
  68
  69 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  70 {
  71         struct i2c_client *client = v4l2_get_subdevdata(sd);
  72
  73         return i2c_smbus_read_byte_data(client, reg);
  74 }
  75
  76 static int adv7170_write_block(struct v4l2_subdev *sd,
  77                      const u8 *data, unsigned int len)
  78 {
  79         struct i2c_client *client = v4l2_get_subdevdata(sd);
  80         struct adv7170 *encoder = to_adv7170(sd);
  81         int ret = -1;
  82         u8 reg;
  83
  84         /* the adv7170 has an autoincrement function, use it if
  85          * the adapter understands raw I2C */
  86         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  87                 /* do raw I2C, not smbus compatible */
  88                 u8 block_data[32];
  89                 int block_len;
  90
  91                 while (len >= 2) {
  92                         block_len = 0;
  93                         block_data[block_len++] = reg = data[0];
  94                         do {
  95                                 block_data[block_len++] =
  96                                     encoder->reg[reg++] = data[1];
  97                                 len -= 2;
  98                                 data += 2;
  99                         } while (len >= 2 && data[0] == reg && block_len < 32);
 100                         ret = i2c_master_send(client, block_data, block_len);
 101                         if (ret < 0)
 102                                 break;
 103                 }
 104         } else {
 105                 /* do some slow I2C emulation kind of thing */
 106                 while (len >= 2) {
 107                         reg = *data++;
 108                         ret = adv7170_write(sd, reg, *data++);
 109                         if (ret < 0)
 110                                 break;
 111                         len -= 2;
 112                 }
 113         }
 114         return ret;
 115 }
 116
 117 /* ----------------------------------------------------------------------- */
 118
 119 #define TR0MODE     0x4c
 120 #define TR0RST      0x80
 121
 122 #define TR1CAPT     0x00
 123 #define TR1PLAY     0x00
 124
 125 static const unsigned char init_NTSC[] = {
 126         0x00, 0x10,             /* MR0 */
 127         0x01, 0x20,             /* MR1 */
 128         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 129         0x03, 0x80,             /* MR3 */
 130         0x04, 0x30,             /* MR4 */
 131         0x05, 0x00,             /* Reserved */
 132         0x06, 0x00,             /* Reserved */
 133         0x07, TR0MODE,          /* TM0 */
 134         0x08, TR1CAPT,          /* TM1 */
 135         0x09, 0x16,             /* Fsc0 */
 136         0x0a, 0x7c,             /* Fsc1 */
 137         0x0b, 0xf0,             /* Fsc2 */
 138         0x0c, 0x21,             /* Fsc3 */
 139         0x0d, 0x00,             /* Subcarrier Phase */
 140         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 141         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 142         0x10, 0x00,             /* Closed Capt. 0 */
 143         0x11, 0x00,             /* Closed Capt. 1 */
 144         0x12, 0x00,             /* Pedestal Ctl 0 */
 145         0x13, 0x00,             /* Pedestal Ctl 1 */
 146         0x14, 0x00,             /* Pedestal Ctl 2 */
 147         0x15, 0x00,             /* Pedestal Ctl 3 */
 148         0x16, 0x00,             /* CGMS_WSS_0 */
 149         0x17, 0x00,             /* CGMS_WSS_1 */
 150         0x18, 0x00,             /* CGMS_WSS_2 */
 151         0x19, 0x00,             /* Teletext Ctl */
 152 };
 153
 154 static const unsigned char init_PAL[] = {
 155         0x00, 0x71,             /* MR0 */
 156         0x01, 0x20,             /* MR1 */
 157         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 158         0x03, 0x80,             /* MR3 */
 159         0x04, 0x30,             /* MR4 */
 160         0x05, 0x00,             /* Reserved */
 161         0x06, 0x00,             /* Reserved */
 162         0x07, TR0MODE,          /* TM0 */
 163         0x08, TR1CAPT,          /* TM1 */
 164         0x09, 0xcb,             /* Fsc0 */
 165         0x0a, 0x8a,             /* Fsc1 */
 166         0x0b, 0x09,             /* Fsc2 */
 167         0x0c, 0x2a,             /* Fsc3 */
 168         0x0d, 0x00,             /* Subcarrier Phase */
 169         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 170         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 171         0x10, 0x00,             /* Closed Capt. 0 */
 172         0x11, 0x00,             /* Closed Capt. 1 */
 173         0x12, 0x00,             /* Pedestal Ctl 0 */
 174         0x13, 0x00,             /* Pedestal Ctl 1 */
 175         0x14, 0x00,             /* Pedestal Ctl 2 */
 176         0x15, 0x00,             /* Pedestal Ctl 3 */
 177         0x16, 0x00,             /* CGMS_WSS_0 */
 178         0x17, 0x00,             /* CGMS_WSS_1 */
 179         0x18, 0x00,             /* CGMS_WSS_2 */
 180         0x19, 0x00,             /* Teletext Ctl */
 181 };
 182
 183
 184 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 185 {
 186         struct adv7170 *encoder = to_adv7170(sd);
 187
 188         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 189
 190         if (std & V4L2_STD_NTSC) {
 191                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 192                 if (encoder->input == 0)
 193                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 194                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 195                 adv7170_write(sd, 0x07, TR0MODE);
 196         } else if (std & V4L2_STD_PAL) {
 197                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 198                 if (encoder->input == 0)
 199                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 200                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 201                 adv7170_write(sd, 0x07, TR0MODE);
 202         } else {
 203                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 204                                 (unsigned long long)std);
 205                 return -EINVAL;
 206         }
 207         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 208         encoder->norm = std;
 209         return 0;
 210 }
 211
 212 static int adv7170_s_routing(struct v4l2_subdev *sd,
 213                              u32 input, u32 output, u32 config)
 214 {
 215         struct adv7170 *encoder = to_adv7170(sd);
 216
 217         /* RJ: input = 0: input is from decoder
 218            input = 1: input is from ZR36060
 219            input = 2: color bar */
 220
 221         v4l2_dbg(1, debug, sd, "set input from %s\n",
 222                         input == 0 ? "decoder" : "ZR36060");
 223
 224         switch (input) {
 225         case 0:
 226                 adv7170_write(sd, 0x01, 0x20);
 227                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 228                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 229                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 230                 adv7170_write(sd, 0x07, TR0MODE);
 231                 /* udelay(10); */
 232                 break;
 233
 234         case 1:
 235                 adv7170_write(sd, 0x01, 0x00);
 236                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 237                 adv7170_write(sd, 0x02, 0x08);
 238                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 239                 adv7170_write(sd, 0x07, TR0MODE);
 240                 /* udelay(10); */
 241                 break;
 242
 243         default:
 244                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 245                 return -EINVAL;
 246         }
 247         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 248         encoder->input = input;
 249         return 0;
 250 }
 251
 252 static int adv7170_enum_mbus_code(struct v4l2_subdev *sd,
 253                 struct v4l2_subdev_pad_config *cfg,
 254                 struct v4l2_subdev_mbus_code_enum *code)
 255 {
 256         if (code->pad || code->index >= ARRAY_SIZE(adv7170_codes))
 257                 return -EINVAL;
 258
 259         code->code = adv7170_codes[code->index];
 260         return 0;
 261 }
 262
 263 static int adv7170_get_fmt(struct v4l2_subdev *sd,
 264                 struct v4l2_subdev_pad_config *cfg,
 265                 struct v4l2_subdev_format *format)
 266 {
 267         struct v4l2_mbus_framefmt *mf = &format->format;
 268         u8 val = adv7170_read(sd, 0x7);
 269
 270         if (format->pad)
 271                 return -EINVAL;
 272
 273         if ((val & 0x40) == (1 << 6))
 274                 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 275         else
 276                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 277
 278         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 279         mf->width       = 0;
 280         mf->height      = 0;
 281         mf->field       = V4L2_FIELD_ANY;
 282
 283         return 0;
 284 }
 285
 286 static int adv7170_set_fmt(struct v4l2_subdev *sd,
 287                 struct v4l2_subdev_pad_config *cfg,
 288                 struct v4l2_subdev_format *format)
 289 {
 290         struct v4l2_mbus_framefmt *mf = &format->format;
 291         u8 val = adv7170_read(sd, 0x7);
 292
 293         if (format->pad)
 294                 return -EINVAL;
 295
 296         switch (mf->code) {
 297         case MEDIA_BUS_FMT_UYVY8_2X8:
 298                 val &= ~0x40;
 299                 break;
 300
 301         case MEDIA_BUS_FMT_UYVY8_1X16:
 302                 val |= 0x40;
 303                 break;
 304
 305         default:
 306                 v4l2_dbg(1, debug, sd,
 307                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 308                 return -EINVAL;
 309         }
 310
 311         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 312                 return adv7170_write(sd, 0x7, val);
 313
 314         return 0;
 315 }
 316
 317 /* ----------------------------------------------------------------------- */
 318
 319 static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 320         .s_std_output = adv7170_s_std_output,
 321         .s_routing = adv7170_s_routing,
 322 };
 323
 324 static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {
 325         .enum_mbus_code = adv7170_enum_mbus_code,
 326         .get_fmt = adv7170_get_fmt,
 327         .set_fmt = adv7170_set_fmt,
 328 };
 329
 330 static const struct v4l2_subdev_ops adv7170_ops = {
 331         .video = &adv7170_video_ops,
 332         .pad = &adv7170_pad_ops,
 333 };
 334
 335 /* ----------------------------------------------------------------------- */
 336
 337 static int adv7170_probe(struct i2c_client *client,
 338                         const struct i2c_device_id *id)
 339 {
 340         struct adv7170 *encoder;
 341         struct v4l2_subdev *sd;
 342         int i;
 343
 344         /* Check if the adapter supports the needed features */
 345         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 346                 return -ENODEV;
 347
 348         v4l_info(client, "chip found @ 0x%x (%s)\n",
 349                         client->addr << 1, client->adapter->name);
 350
 351         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 352         if (encoder == NULL)
 353                 return -ENOMEM;
 354         sd = &encoder->sd;
 355         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 356         encoder->norm = V4L2_STD_NTSC;
 357         encoder->input = 0;
 358
 359         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 360         if (i >= 0) {
 361                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 362                 i = adv7170_write(sd, 0x07, TR0MODE);
 363                 i = adv7170_read(sd, 0x12);
 364                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 365         }
 366         if (i < 0)
 367                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 368         return 0;
 369 }
 370
 371 static int adv7170_remove(struct i2c_client *client)
 372 {
 373         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 374
 375         v4l2_device_unregister_subdev(sd);
 376         return 0;
 377 }
 378
 379 /* ----------------------------------------------------------------------- */
 380
 381 static const struct i2c_device_id adv7170_id[] = {
 382         { "adv7170", 0 },
 383         { "adv7171", 0 },
 384         { }
 385 };
 386 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 387
 388 static struct i2c_driver adv7170_driver = {
 389         .driver = {
 390                 .name   = "adv7170",
 391         },
 392         .probe          = adv7170_probe,
 393         .remove         = adv7170_remove,
 394         .id_table       = adv7170_id,
 395 };
 396
 397 module_i2c_driver(adv7170_driver);