drivers/media/i2c/vpx3220.c

   1 /*
   2  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
   3  *
   4  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26 #include <asm/uaccess.h>
  27 #include <linux/i2c.h>
  28 #include <linux/videodev2.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-ctrls.h>
  31
  32 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
  33 MODULE_AUTHOR("Laurent Pinchart");
  34 MODULE_LICENSE("GPL");
  35
  36 static int debug;
  37 module_param(debug, int, 0);
  38 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  39
  40
  41 #define VPX_TIMEOUT_COUNT  10
  42
  43 /* ----------------------------------------------------------------------- */
  44
  45 struct vpx3220 {
  46         struct v4l2_subdev sd;
  47         struct v4l2_ctrl_handler hdl;
  48         unsigned char reg[255];
  49
  50         v4l2_std_id norm;
  51         int input;
  52         int enable;
  53 };
  54
  55 static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
  56 {
  57         return container_of(sd, struct vpx3220, sd);
  58 }
  59
  60 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  61 {
  62         return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;
  63 }
  64
  65 static char *inputs[] = { "internal", "composite", "svideo" };
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70 {
  71         struct i2c_client *client = v4l2_get_subdevdata(sd);
  72         struct vpx3220 *decoder = i2c_get_clientdata(client);
  73
  74         decoder->reg[reg] = value;
  75         return i2c_smbus_write_byte_data(client, reg, value);
  76 }
  77
  78 static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
  79 {
  80         struct i2c_client *client = v4l2_get_subdevdata(sd);
  81
  82         return i2c_smbus_read_byte_data(client, reg);
  83 }
  84
  85 static int vpx3220_fp_status(struct v4l2_subdev *sd)
  86 {
  87         unsigned char status;
  88         unsigned int i;
  89
  90         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  91                 status = vpx3220_read(sd, 0x29);
  92
  93                 if (!(status & 4))
  94                         return 0;
  95
  96                 udelay(10);
  97
  98                 if (need_resched())
  99                         cond_resched();
 100         }
 101
 102         return -1;
 103 }
 104
 105 static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
 106 {
 107         struct i2c_client *client = v4l2_get_subdevdata(sd);
 108
 109         /* Write the 16-bit address to the FPWR register */
 110         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 111                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 112                 return -1;
 113         }
 114
 115         if (vpx3220_fp_status(sd) < 0)
 116                 return -1;
 117
 118         /* Write the 16-bit data to the FPDAT register */
 119         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 120                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 121                 return -1;
 122         }
 123
 124         return 0;
 125 }
 126
 127 static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
 128 {
 129         struct i2c_client *client = v4l2_get_subdevdata(sd);
 130         s16 data;
 131
 132         /* Write the 16-bit address to the FPRD register */
 133         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 134                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 135                 return -1;
 136         }
 137
 138         if (vpx3220_fp_status(sd) < 0)
 139                 return -1;
 140
 141         /* Read the 16-bit data from the FPDAT register */
 142         data = i2c_smbus_read_word_data(client, 0x28);
 143         if (data == -1) {
 144                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 145                 return -1;
 146         }
 147
 148         return swab16(data);
 149 }
 150
 151 static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
 152 {
 153         u8 reg;
 154         int ret = -1;
 155
 156         while (len >= 2) {
 157                 reg = *data++;
 158                 ret = vpx3220_write(sd, reg, *data++);
 159                 if (ret < 0)
 160                         break;
 161                 len -= 2;
 162         }
 163
 164         return ret;
 165 }
 166
 167 static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
 168                 const u16 *data, unsigned int len)
 169 {
 170         u8 reg;
 171         int ret = 0;
 172
 173         while (len > 1) {
 174                 reg = *data++;
 175                 ret |= vpx3220_fp_write(sd, reg, *data++);
 176                 len -= 2;
 177         }
 178
 179         return ret;
 180 }
 181
 182 /* ---------------------------------------------------------------------- */
 183
 184 static const unsigned short init_ntsc[] = {
 185         0x1c, 0x00,             /* NTSC tint angle */
 186         0x88, 17,               /* Window 1 vertical */
 187         0x89, 240,              /* Vertical lines in */
 188         0x8a, 240,              /* Vertical lines out */
 189         0x8b, 000,              /* Horizontal begin */
 190         0x8c, 640,              /* Horizontal length */
 191         0x8d, 640,              /* Number of pixels */
 192         0x8f, 0xc00,            /* Disable window 2 */
 193         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 194                                  * mode, latch windows */
 195         0xf2, 0x13,             /* NTSC M, composite input */
 196         0xe7, 0x1e1,            /* Enable vertical standard
 197                                  * locking @ 240 lines */
 198 };
 199
 200 static const unsigned short init_pal[] = {
 201         0x88, 23,               /* Window 1 vertical begin */
 202         0x89, 288,              /* Vertical lines in (16 lines
 203                                  * skipped by the VFE) */
 204         0x8a, 288,              /* Vertical lines out (16 lines
 205                                  * skipped by the VFE) */
 206         0x8b, 16,               /* Horizontal begin */
 207         0x8c, 768,              /* Horizontal length */
 208         0x8d, 784,              /* Number of pixels
 209                                  * Must be >= Horizontal begin + Horizontal length */
 210         0x8f, 0xc00,            /* Disable window 2 */
 211         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 212                                  * mode, latch windows */
 213         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 214         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 215 };
 216
 217 static const unsigned short init_secam[] = {
 218         0x88, 23,               /* Window 1 vertical begin */
 219         0x89, 288,              /* Vertical lines in (16 lines
 220                                  * skipped by the VFE) */
 221         0x8a, 288,              /* Vertical lines out (16 lines
 222                                  * skipped by the VFE) */
 223         0x8b, 16,               /* Horizontal begin */
 224         0x8c, 768,              /* Horizontal length */
 225         0x8d, 784,              /* Number of pixels
 226                                  * Must be >= Horizontal begin + Horizontal length */
 227         0x8f, 0xc00,            /* Disable window 2 */
 228         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 229                                  * mode, latch windows */
 230         0xf2, 0x3d5,            /* SECAM, composite input */
 231         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 232 };
 233
 234 static const unsigned char init_common[] = {
 235         0xf2, 0x00,             /* Disable all outputs */
 236         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 237                                  * (clamp off) */
 238         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 239                                  * pulse = 2, Odd/Even flag */
 240         0x20, 0x03,             /* IF compensation 0dB/oct */
 241         0xe0, 0xff,             /* Open up all comparators */
 242         0xe1, 0x00,
 243         0xe2, 0x7f,
 244         0xe3, 0x80,
 245         0xe4, 0x7f,
 246         0xe5, 0x80,
 247         0xe6, 0x00,             /* Brightness set to 0 */
 248         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 249                                  * 10 to 8 2-bit error diffusion */
 250         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 251                                  * ... (p.32) */
 252         0xea, 0x18,             /* LLC2 connected, output FIFO
 253                                  * reset with VACTintern */
 254         0xf0, 0x8a,             /* Half full level to 10, bus
 255                                  * shuffler [7:0, 23:16, 15:8] */
 256         0xf1, 0x18,             /* Single clock, sync mode, no
 257                                  * FE delay, no HLEN counter */
 258         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 259                                  * strength to 2 */
 260         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 261                                  * ALPHA strength to 4 */
 262 };
 263
 264 static const unsigned short init_fp[] = {
 265         0x59, 0,
 266         0xa0, 2070,             /* ACC reference */
 267         0xa3, 0,
 268         0xa4, 0,
 269         0xa8, 30,
 270         0xb2, 768,
 271         0xbe, 27,
 272         0x58, 0,
 273         0x26, 0,
 274         0x4b, 0x298,            /* PLL gain */
 275 };
 276
 277
 278 static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
 279 {
 280         struct vpx3220 *decoder = to_vpx3220(sd);
 281
 282         vpx3220_write_block(sd, init_common, sizeof(init_common));
 283         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 284         if (decoder->norm & V4L2_STD_NTSC)
 285                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 286         else if (decoder->norm & V4L2_STD_PAL)
 287                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 288         else if (decoder->norm & V4L2_STD_SECAM)
 289                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 290         else
 291                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 292         return 0;
 293 }
 294
 295 static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 296 {
 297         int res = V4L2_IN_ST_NO_SIGNAL, status;
 298         v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
 299
 300         status = vpx3220_fp_read(sd, 0x0f3);
 301
 302         v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
 303
 304         if (status < 0)
 305                 return status;
 306
 307         if ((status & 0x20) == 0) {
 308                 res = 0;
 309
 310                 switch (status & 0x18) {
 311                 case 0x00:
 312                 case 0x10:
 313                 case 0x14:
 314                 case 0x18:
 315                         std &= V4L2_STD_PAL;
 316                         break;
 317
 318                 case 0x08:
 319                         std &= V4L2_STD_SECAM;
 320                         break;
 321
 322                 case 0x04:
 323                 case 0x0c:
 324                 case 0x1c:
 325                         std &= V4L2_STD_NTSC;
 326                         break;
 327                 }
 328         } else {
 329                 std = V4L2_STD_UNKNOWN;
 330         }
 331         if (pstd)
 332                 *pstd = std;
 333         if (pstatus)
 334                 *pstatus = res;
 335         return 0;
 336 }
 337
 338 static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 339 {
 340         v4l2_dbg(1, debug, sd, "querystd\n");
 341         return vpx3220_status(sd, NULL, std);
 342 }
 343
 344 static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
 345 {
 346         v4l2_dbg(1, debug, sd, "g_input_status\n");
 347         return vpx3220_status(sd, status, NULL);
 348 }
 349
 350 static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 351 {
 352         struct vpx3220 *decoder = to_vpx3220(sd);
 353         int temp_input;
 354
 355         /* Here we back up the input selection because it gets
 356            overwritten when we fill the registers with the
 357            chosen video norm */
 358         temp_input = vpx3220_fp_read(sd, 0xf2);
 359
 360         v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
 361         if (std & V4L2_STD_NTSC) {
 362                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 363                 v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
 364         } else if (std & V4L2_STD_PAL) {
 365                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 366                 v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
 367         } else if (std & V4L2_STD_SECAM) {
 368                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 369                 v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
 370         } else {
 371                 return -EINVAL;
 372         }
 373
 374         decoder->norm = std;
 375
 376         /* And here we set the backed up video input again */
 377         vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);
 378         udelay(10);
 379         return 0;
 380 }
 381
 382 static int vpx3220_s_routing(struct v4l2_subdev *sd,
 383                              u32 input, u32 output, u32 config)
 384 {
 385         int data;
 386
 387         /* RJ:   input = 0: ST8 (PCTV) input
 388                  input = 1: COMPOSITE  input
 389                  input = 2: SVHS       input  */
 390
 391         const int input_vals[3][2] = {
 392                 {0x0c, 0},
 393                 {0x0d, 0},
 394                 {0x0e, 1}
 395         };
 396
 397         if (input > 2)
 398                 return -EINVAL;
 399
 400         v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);
 401
 402         vpx3220_write(sd, 0x33, input_vals[input][0]);
 403
 404         data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);
 405         if (data < 0)
 406                 return data;
 407         /* 0x0010 is required to latch the setting */
 408         vpx3220_fp_write(sd, 0xf2,
 409                         data | (input_vals[input][1] << 5) | 0x0010);
 410
 411         udelay(10);
 412         return 0;
 413 }
 414
 415 static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
 416 {
 417         v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");
 418
 419         vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
 420         return 0;
 421 }
 422
 423 static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl)
 424 {
 425         struct v4l2_subdev *sd = to_sd(ctrl);
 426
 427         switch (ctrl->id) {
 428         case V4L2_CID_BRIGHTNESS:
 429                 vpx3220_write(sd, 0xe6, ctrl->val);
 430                 return 0;
 431         case V4L2_CID_CONTRAST:
 432                 /* Bit 7 and 8 is for noise shaping */
 433                 vpx3220_write(sd, 0xe7, ctrl->val + 192);
 434                 return 0;
 435         case V4L2_CID_SATURATION:
 436                 vpx3220_fp_write(sd, 0xa0, ctrl->val);
 437                 return 0;
 438         case V4L2_CID_HUE:
 439                 vpx3220_fp_write(sd, 0x1c, ctrl->val);
 440                 return 0;
 441         }
 442         return -EINVAL;
 443 }
 444
 445 /* ----------------------------------------------------------------------- */
 446
 447 static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {
 448         .s_ctrl = vpx3220_s_ctrl,
 449 };
 450
 451 static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
 452         .init = vpx3220_init,
 453 };
 454
 455 static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
 456         .s_std = vpx3220_s_std,
 457         .s_routing = vpx3220_s_routing,
 458         .s_stream = vpx3220_s_stream,
 459         .querystd = vpx3220_querystd,
 460         .g_input_status = vpx3220_g_input_status,
 461 };
 462
 463 static const struct v4l2_subdev_ops vpx3220_ops = {
 464         .core = &vpx3220_core_ops,
 465         .video = &vpx3220_video_ops,
 466 };
 467
 468 /* -----------------------------------------------------------------------
 469  * Client management code
 470  */
 471
 472 static int vpx3220_probe(struct i2c_client *client,
 473                         const struct i2c_device_id *id)
 474 {
 475         struct vpx3220 *decoder;
 476         struct v4l2_subdev *sd;
 477         const char *name = NULL;
 478         u8 ver;
 479         u16 pn;
 480
 481         /* Check if the adapter supports the needed features */
 482         if (!i2c_check_functionality(client->adapter,
 483                 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 484                 return -ENODEV;
 485
 486         decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 487         if (decoder == NULL)
 488                 return -ENOMEM;
 489         sd = &decoder->sd;
 490         v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
 491         decoder->norm = V4L2_STD_PAL;
 492         decoder->input = 0;
 493         decoder->enable = 1;
 494         v4l2_ctrl_handler_init(&decoder->hdl, 4);
 495         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 496                 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
 497         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 498                 V4L2_CID_CONTRAST, 0, 63, 1, 32);
 499         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 500                 V4L2_CID_SATURATION, 0, 4095, 1, 2048);
 501         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 502                 V4L2_CID_HUE, -512, 511, 1, 0);
 503         sd->ctrl_handler = &decoder->hdl;
 504         if (decoder->hdl.error) {
 505                 int err = decoder->hdl.error;
 506
 507                 v4l2_ctrl_handler_free(&decoder->hdl);
 508                 return err;
 509         }
 510         v4l2_ctrl_handler_setup(&decoder->hdl);
 511
 512         ver = i2c_smbus_read_byte_data(client, 0x00);
 513         pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
 514                 i2c_smbus_read_byte_data(client, 0x01);
 515         if (ver == 0xec) {
 516                 switch (pn) {
 517                 case 0x4680:
 518                         name = "vpx3220a";
 519                         break;
 520                 case 0x4260:
 521                         name = "vpx3216b";
 522                         break;
 523                 case 0x4280:
 524                         name = "vpx3214c";
 525                         break;
 526                 }
 527         }
 528         if (name)
 529                 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
 530                         client->addr << 1, client->adapter->name);
 531         else
 532                 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
 533                         ver, pn, client->addr << 1, client->adapter->name);
 534
 535         vpx3220_write_block(sd, init_common, sizeof(init_common));
 536         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 537         /* Default to PAL */
 538         vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 539         return 0;
 540 }
 541
 542 static int vpx3220_remove(struct i2c_client *client)
 543 {
 544         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 545         struct vpx3220 *decoder = to_vpx3220(sd);
 546
 547         v4l2_device_unregister_subdev(sd);
 548         v4l2_ctrl_handler_free(&decoder->hdl);
 549
 550         return 0;
 551 }
 552
 553 static const struct i2c_device_id vpx3220_id[] = {
 554         { "vpx3220a", 0 },
 555         { "vpx3216b", 0 },
 556         { "vpx3214c", 0 },
 557         { }
 558 };
 559 MODULE_DEVICE_TABLE(i2c, vpx3220_id);
 560
 561 static struct i2c_driver vpx3220_driver = {
 562         .driver = {
 563                 .name   = "vpx3220",
 564         },
 565         .probe          = vpx3220_probe,
 566         .remove         = vpx3220_remove,
 567         .id_table       = vpx3220_id,
 568 };
 569
 570 module_i2c_driver(vpx3220_driver);