drivers/media/i2c/vpx3220.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
   4  *
   5  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/init.h>
  10 #include <linux/delay.h>
  11 #include <linux/types.h>
  12 #include <linux/slab.h>
  13 #include <linux/uaccess.h>
  14 #include <linux/i2c.h>
  15 #include <linux/videodev2.h>
  16 #include <media/v4l2-device.h>
  17 #include <media/v4l2-ctrls.h>
  18
  19 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
  20 MODULE_AUTHOR("Laurent Pinchart");
  21 MODULE_LICENSE("GPL");
  22
  23 static int debug;
  24 module_param(debug, int, 0);
  25 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  26
  27
  28 #define VPX_TIMEOUT_COUNT  10
  29
  30 /* ----------------------------------------------------------------------- */
  31
  32 struct vpx3220 {
  33         struct v4l2_subdev sd;
  34         struct v4l2_ctrl_handler hdl;
  35         unsigned char reg[255];
  36
  37         v4l2_std_id norm;
  38         int input;
  39         int enable;
  40 };
  41
  42 static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
  43 {
  44         return container_of(sd, struct vpx3220, sd);
  45 }
  46
  47 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  48 {
  49         return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;
  50 }
  51
  52 static char *inputs[] = { "internal", "composite", "svideo" };
  53
  54 /* ----------------------------------------------------------------------- */
  55
  56 static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  57 {
  58         struct i2c_client *client = v4l2_get_subdevdata(sd);
  59         struct vpx3220 *decoder = i2c_get_clientdata(client);
  60
  61         decoder->reg[reg] = value;
  62         return i2c_smbus_write_byte_data(client, reg, value);
  63 }
  64
  65 static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
  66 {
  67         struct i2c_client *client = v4l2_get_subdevdata(sd);
  68
  69         return i2c_smbus_read_byte_data(client, reg);
  70 }
  71
  72 static int vpx3220_fp_status(struct v4l2_subdev *sd)
  73 {
  74         unsigned char status;
  75         unsigned int i;
  76
  77         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  78                 status = vpx3220_read(sd, 0x29);
  79
  80                 if (!(status & 4))
  81                         return 0;
  82
  83                 udelay(10);
  84
  85                 if (need_resched())
  86                         cond_resched();
  87         }
  88
  89         return -1;
  90 }
  91
  92 static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
  93 {
  94         struct i2c_client *client = v4l2_get_subdevdata(sd);
  95
  96         /* Write the 16-bit address to the FPWR register */
  97         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
  98                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
  99                 return -1;
 100         }
 101
 102         if (vpx3220_fp_status(sd) < 0)
 103                 return -1;
 104
 105         /* Write the 16-bit data to the FPDAT register */
 106         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 107                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 108                 return -1;
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
 115 {
 116         struct i2c_client *client = v4l2_get_subdevdata(sd);
 117         s16 data;
 118
 119         /* Write the 16-bit address to the FPRD register */
 120         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 121                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 122                 return -1;
 123         }
 124
 125         if (vpx3220_fp_status(sd) < 0)
 126                 return -1;
 127
 128         /* Read the 16-bit data from the FPDAT register */
 129         data = i2c_smbus_read_word_data(client, 0x28);
 130         if (data == -1) {
 131                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 132                 return -1;
 133         }
 134
 135         return swab16(data);
 136 }
 137
 138 static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
 139 {
 140         u8 reg;
 141         int ret = -1;
 142
 143         while (len >= 2) {
 144                 reg = *data++;
 145                 ret = vpx3220_write(sd, reg, *data++);
 146                 if (ret < 0)
 147                         break;
 148                 len -= 2;
 149         }
 150
 151         return ret;
 152 }
 153
 154 static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
 155                 const u16 *data, unsigned int len)
 156 {
 157         u8 reg;
 158         int ret = 0;
 159
 160         while (len > 1) {
 161                 reg = *data++;
 162                 ret |= vpx3220_fp_write(sd, reg, *data++);
 163                 len -= 2;
 164         }
 165
 166         return ret;
 167 }
 168
 169 /* ---------------------------------------------------------------------- */
 170
 171 static const unsigned short init_ntsc[] = {
 172         0x1c, 0x00,             /* NTSC tint angle */
 173         0x88, 17,               /* Window 1 vertical */
 174         0x89, 240,              /* Vertical lines in */
 175         0x8a, 240,              /* Vertical lines out */
 176         0x8b, 000,              /* Horizontal begin */
 177         0x8c, 640,              /* Horizontal length */
 178         0x8d, 640,              /* Number of pixels */
 179         0x8f, 0xc00,            /* Disable window 2 */
 180         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 181                                  * mode, latch windows */
 182         0xf2, 0x13,             /* NTSC M, composite input */
 183         0xe7, 0x1e1,            /* Enable vertical standard
 184                                  * locking @ 240 lines */
 185 };
 186
 187 static const unsigned short init_pal[] = {
 188         0x88, 23,               /* Window 1 vertical begin */
 189         0x89, 288,              /* Vertical lines in (16 lines
 190                                  * skipped by the VFE) */
 191         0x8a, 288,              /* Vertical lines out (16 lines
 192                                  * skipped by the VFE) */
 193         0x8b, 16,               /* Horizontal begin */
 194         0x8c, 768,              /* Horizontal length */
 195         0x8d, 784,              /* Number of pixels
 196                                  * Must be >= Horizontal begin + Horizontal length */
 197         0x8f, 0xc00,            /* Disable window 2 */
 198         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 199                                  * mode, latch windows */
 200         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 201         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 202 };
 203
 204 static const unsigned short init_secam[] = {
 205         0x88, 23,               /* Window 1 vertical begin */
 206         0x89, 288,              /* Vertical lines in (16 lines
 207                                  * skipped by the VFE) */
 208         0x8a, 288,              /* Vertical lines out (16 lines
 209                                  * skipped by the VFE) */
 210         0x8b, 16,               /* Horizontal begin */
 211         0x8c, 768,              /* Horizontal length */
 212         0x8d, 784,              /* Number of pixels
 213                                  * Must be >= Horizontal begin + Horizontal length */
 214         0x8f, 0xc00,            /* Disable window 2 */
 215         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 216                                  * mode, latch windows */
 217         0xf2, 0x3d5,            /* SECAM, composite input */
 218         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 219 };
 220
 221 static const unsigned char init_common[] = {
 222         0xf2, 0x00,             /* Disable all outputs */
 223         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 224                                  * (clamp off) */
 225         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 226                                  * pulse = 2, Odd/Even flag */
 227         0x20, 0x03,             /* IF compensation 0dB/oct */
 228         0xe0, 0xff,             /* Open up all comparators */
 229         0xe1, 0x00,
 230         0xe2, 0x7f,
 231         0xe3, 0x80,
 232         0xe4, 0x7f,
 233         0xe5, 0x80,
 234         0xe6, 0x00,             /* Brightness set to 0 */
 235         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 236                                  * 10 to 8 2-bit error diffusion */
 237         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 238                                  * ... (p.32) */
 239         0xea, 0x18,             /* LLC2 connected, output FIFO
 240                                  * reset with VACTintern */
 241         0xf0, 0x8a,             /* Half full level to 10, bus
 242                                  * shuffler [7:0, 23:16, 15:8] */
 243         0xf1, 0x18,             /* Single clock, sync mode, no
 244                                  * FE delay, no HLEN counter */
 245         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 246                                  * strength to 2 */
 247         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 248                                  * ALPHA strength to 4 */
 249 };
 250
 251 static const unsigned short init_fp[] = {
 252         0x59, 0,
 253         0xa0, 2070,             /* ACC reference */
 254         0xa3, 0,
 255         0xa4, 0,
 256         0xa8, 30,
 257         0xb2, 768,
 258         0xbe, 27,
 259         0x58, 0,
 260         0x26, 0,
 261         0x4b, 0x298,            /* PLL gain */
 262 };
 263
 264
 265 static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
 266 {
 267         struct vpx3220 *decoder = to_vpx3220(sd);
 268
 269         vpx3220_write_block(sd, init_common, sizeof(init_common));
 270         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 271         if (decoder->norm & V4L2_STD_NTSC)
 272                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 273         else if (decoder->norm & V4L2_STD_PAL)
 274                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 275         else if (decoder->norm & V4L2_STD_SECAM)
 276                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 277         else
 278                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 279         return 0;
 280 }
 281
 282 static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 283 {
 284         int res = V4L2_IN_ST_NO_SIGNAL, status;
 285         v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
 286
 287         status = vpx3220_fp_read(sd, 0x0f3);
 288
 289         v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
 290
 291         if (status < 0)
 292                 return status;
 293
 294         if ((status & 0x20) == 0) {
 295                 res = 0;
 296
 297                 switch (status & 0x18) {
 298                 case 0x00:
 299                 case 0x10:
 300                 case 0x14:
 301                 case 0x18:
 302                         std &= V4L2_STD_PAL;
 303                         break;
 304
 305                 case 0x08:
 306                         std &= V4L2_STD_SECAM;
 307                         break;
 308
 309                 case 0x04:
 310                 case 0x0c:
 311                 case 0x1c:
 312                         std &= V4L2_STD_NTSC;
 313                         break;
 314                 }
 315         } else {
 316                 std = V4L2_STD_UNKNOWN;
 317         }
 318         if (pstd)
 319                 *pstd = std;
 320         if (pstatus)
 321                 *pstatus = res;
 322         return 0;
 323 }
 324
 325 static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 326 {
 327         v4l2_dbg(1, debug, sd, "querystd\n");
 328         return vpx3220_status(sd, NULL, std);
 329 }
 330
 331 static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
 332 {
 333         v4l2_dbg(1, debug, sd, "g_input_status\n");
 334         return vpx3220_status(sd, status, NULL);
 335 }
 336
 337 static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 338 {
 339         struct vpx3220 *decoder = to_vpx3220(sd);
 340         int temp_input;
 341
 342         /* Here we back up the input selection because it gets
 343            overwritten when we fill the registers with the
 344            chosen video norm */
 345         temp_input = vpx3220_fp_read(sd, 0xf2);
 346
 347         v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
 348         if (std & V4L2_STD_NTSC) {
 349                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 350                 v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
 351         } else if (std & V4L2_STD_PAL) {
 352                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 353                 v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
 354         } else if (std & V4L2_STD_SECAM) {
 355                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 356                 v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
 357         } else {
 358                 return -EINVAL;
 359         }
 360
 361         decoder->norm = std;
 362
 363         /* And here we set the backed up video input again */
 364         vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);
 365         udelay(10);
 366         return 0;
 367 }
 368
 369 static int vpx3220_s_routing(struct v4l2_subdev *sd,
 370                              u32 input, u32 output, u32 config)
 371 {
 372         int data;
 373
 374         /* RJ:   input = 0: ST8 (PCTV) input
 375                  input = 1: COMPOSITE  input
 376                  input = 2: SVHS       input  */
 377
 378         static const int input_vals[3][2] = {
 379                 {0x0c, 0},
 380                 {0x0d, 0},
 381                 {0x0e, 1}
 382         };
 383
 384         if (input > 2)
 385                 return -EINVAL;
 386
 387         v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);
 388
 389         vpx3220_write(sd, 0x33, input_vals[input][0]);
 390
 391         data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);
 392         if (data < 0)
 393                 return data;
 394         /* 0x0010 is required to latch the setting */
 395         vpx3220_fp_write(sd, 0xf2,
 396                         data | (input_vals[input][1] << 5) | 0x0010);
 397
 398         udelay(10);
 399         return 0;
 400 }
 401
 402 static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
 403 {
 404         v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");
 405
 406         vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
 407         return 0;
 408 }
 409
 410 static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl)
 411 {
 412         struct v4l2_subdev *sd = to_sd(ctrl);
 413
 414         switch (ctrl->id) {
 415         case V4L2_CID_BRIGHTNESS:
 416                 vpx3220_write(sd, 0xe6, ctrl->val);
 417                 return 0;
 418         case V4L2_CID_CONTRAST:
 419                 /* Bit 7 and 8 is for noise shaping */
 420                 vpx3220_write(sd, 0xe7, ctrl->val + 192);
 421                 return 0;
 422         case V4L2_CID_SATURATION:
 423                 vpx3220_fp_write(sd, 0xa0, ctrl->val);
 424                 return 0;
 425         case V4L2_CID_HUE:
 426                 vpx3220_fp_write(sd, 0x1c, ctrl->val);
 427                 return 0;
 428         }
 429         return -EINVAL;
 430 }
 431
 432 /* ----------------------------------------------------------------------- */
 433
 434 static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {
 435         .s_ctrl = vpx3220_s_ctrl,
 436 };
 437
 438 static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
 439         .init = vpx3220_init,
 440 };
 441
 442 static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
 443         .s_std = vpx3220_s_std,
 444         .s_routing = vpx3220_s_routing,
 445         .s_stream = vpx3220_s_stream,
 446         .querystd = vpx3220_querystd,
 447         .g_input_status = vpx3220_g_input_status,
 448 };
 449
 450 static const struct v4l2_subdev_ops vpx3220_ops = {
 451         .core = &vpx3220_core_ops,
 452         .video = &vpx3220_video_ops,
 453 };
 454
 455 /* -----------------------------------------------------------------------
 456  * Client management code
 457  */
 458
 459 static int vpx3220_probe(struct i2c_client *client,
 460                         const struct i2c_device_id *id)
 461 {
 462         struct vpx3220 *decoder;
 463         struct v4l2_subdev *sd;
 464         const char *name = NULL;
 465         u8 ver;
 466         u16 pn;
 467
 468         /* Check if the adapter supports the needed features */
 469         if (!i2c_check_functionality(client->adapter,
 470                 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 471                 return -ENODEV;
 472
 473         decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 474         if (decoder == NULL)
 475                 return -ENOMEM;
 476         sd = &decoder->sd;
 477         v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
 478         decoder->norm = V4L2_STD_PAL;
 479         decoder->input = 0;
 480         decoder->enable = 1;
 481         v4l2_ctrl_handler_init(&decoder->hdl, 4);
 482         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 483                 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
 484         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 485                 V4L2_CID_CONTRAST, 0, 63, 1, 32);
 486         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 487                 V4L2_CID_SATURATION, 0, 4095, 1, 2048);
 488         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 489                 V4L2_CID_HUE, -512, 511, 1, 0);
 490         sd->ctrl_handler = &decoder->hdl;
 491         if (decoder->hdl.error) {
 492                 int err = decoder->hdl.error;
 493
 494                 v4l2_ctrl_handler_free(&decoder->hdl);
 495                 return err;
 496         }
 497         v4l2_ctrl_handler_setup(&decoder->hdl);
 498
 499         ver = i2c_smbus_read_byte_data(client, 0x00);
 500         pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
 501                 i2c_smbus_read_byte_data(client, 0x01);
 502         if (ver == 0xec) {
 503                 switch (pn) {
 504                 case 0x4680:
 505                         name = "vpx3220a";
 506                         break;
 507                 case 0x4260:
 508                         name = "vpx3216b";
 509                         break;
 510                 case 0x4280:
 511                         name = "vpx3214c";
 512                         break;
 513                 }
 514         }
 515         if (name)
 516                 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
 517                         client->addr << 1, client->adapter->name);
 518         else
 519                 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
 520                         ver, pn, client->addr << 1, client->adapter->name);
 521
 522         vpx3220_write_block(sd, init_common, sizeof(init_common));
 523         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 524         /* Default to PAL */
 525         vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 526         return 0;
 527 }
 528
 529 static int vpx3220_remove(struct i2c_client *client)
 530 {
 531         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 532         struct vpx3220 *decoder = to_vpx3220(sd);
 533
 534         v4l2_device_unregister_subdev(sd);
 535         v4l2_ctrl_handler_free(&decoder->hdl);
 536
 537         return 0;
 538 }
 539
 540 static const struct i2c_device_id vpx3220_id[] = {
 541         { "vpx3220a", 0 },
 542         { "vpx3216b", 0 },
 543         { "vpx3214c", 0 },
 544         { }
 545 };
 546 MODULE_DEVICE_TABLE(i2c, vpx3220_id);
 547
 548 static struct i2c_driver vpx3220_driver = {
 549         .driver = {
 550                 .name   = "vpx3220",
 551         },
 552         .probe          = vpx3220_probe,
 553         .remove         = vpx3220_remove,
 554         .id_table       = vpx3220_id,
 555 };
 556
 557 module_i2c_driver(vpx3220_driver);