drivers/media/video/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-chip-ident.h>
  31 #include <media/v4l2-ctrls.h>
  32
  33 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
  34 MODULE_AUTHOR("Laurent Pinchart");
  35 MODULE_LICENSE("GPL");
  36
  37 static int debug;
  38 module_param(debug, int, 0);
  39 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  40
  41
  42 #define VPX_TIMEOUT_COUNT  10
  43
  44 /* ----------------------------------------------------------------------- */
  45
  46 struct vpx3220 {
  47         struct v4l2_subdev sd;
  48         struct v4l2_ctrl_handler hdl;
  49         unsigned char reg[255];
  50
  51         v4l2_std_id norm;
  52         int ident;
  53         int input;
  54         int enable;
  55 };
  56
  57 static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
  58 {
  59         return container_of(sd, struct vpx3220, sd);
  60 }
  61
  62 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  63 {
  64         return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;
  65 }
  66
  67 static char *inputs[] = { "internal", "composite", "svideo" };
  68
  69 /* ----------------------------------------------------------------------- */
  70
  71 static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  72 {
  73         struct i2c_client *client = v4l2_get_subdevdata(sd);
  74         struct vpx3220 *decoder = i2c_get_clientdata(client);
  75
  76         decoder->reg[reg] = value;
  77         return i2c_smbus_write_byte_data(client, reg, value);
  78 }
  79
  80 static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
  81 {
  82         struct i2c_client *client = v4l2_get_subdevdata(sd);
  83
  84         return i2c_smbus_read_byte_data(client, reg);
  85 }
  86
  87 static int vpx3220_fp_status(struct v4l2_subdev *sd)
  88 {
  89         unsigned char status;
  90         unsigned int i;
  91
  92         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  93                 status = vpx3220_read(sd, 0x29);
  94
  95                 if (!(status & 4))
  96                         return 0;
  97
  98                 udelay(10);
  99
 100                 if (need_resched())
 101                         cond_resched();
 102         }
 103
 104         return -1;
 105 }
 106
 107 static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
 108 {
 109         struct i2c_client *client = v4l2_get_subdevdata(sd);
 110
 111         /* Write the 16-bit address to the FPWR register */
 112         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 113                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 114                 return -1;
 115         }
 116
 117         if (vpx3220_fp_status(sd) < 0)
 118                 return -1;
 119
 120         /* Write the 16-bit data to the FPDAT register */
 121         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 122                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 123                 return -1;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
 130 {
 131         struct i2c_client *client = v4l2_get_subdevdata(sd);
 132         s16 data;
 133
 134         /* Write the 16-bit address to the FPRD register */
 135         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 136                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 137                 return -1;
 138         }
 139
 140         if (vpx3220_fp_status(sd) < 0)
 141                 return -1;
 142
 143         /* Read the 16-bit data from the FPDAT register */
 144         data = i2c_smbus_read_word_data(client, 0x28);
 145         if (data == -1) {
 146                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 147                 return -1;
 148         }
 149
 150         return swab16(data);
 151 }
 152
 153 static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
 154 {
 155         u8 reg;
 156         int ret = -1;
 157
 158         while (len >= 2) {
 159                 reg = *data++;
 160                 ret = vpx3220_write(sd, reg, *data++);
 161                 if (ret < 0)
 162                         break;
 163                 len -= 2;
 164         }
 165
 166         return ret;
 167 }
 168
 169 static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
 170                 const u16 *data, unsigned int len)
 171 {
 172         u8 reg;
 173         int ret = 0;
 174
 175         while (len > 1) {
 176                 reg = *data++;
 177                 ret |= vpx3220_fp_write(sd, reg, *data++);
 178                 len -= 2;
 179         }
 180
 181         return ret;
 182 }
 183
 184 /* ---------------------------------------------------------------------- */
 185
 186 static const unsigned short init_ntsc[] = {
 187         0x1c, 0x00,             /* NTSC tint angle */
 188         0x88, 17,               /* Window 1 vertical */
 189         0x89, 240,              /* Vertical lines in */
 190         0x8a, 240,              /* Vertical lines out */
 191         0x8b, 000,              /* Horizontal begin */
 192         0x8c, 640,              /* Horizontal length */
 193         0x8d, 640,              /* Number of pixels */
 194         0x8f, 0xc00,            /* Disable window 2 */
 195         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 196                                  * mode, latch windows */
 197         0xf2, 0x13,             /* NTSC M, composite input */
 198         0xe7, 0x1e1,            /* Enable vertical standard
 199                                  * locking @ 240 lines */
 200 };
 201
 202 static const unsigned short init_pal[] = {
 203         0x88, 23,               /* Window 1 vertical begin */
 204         0x89, 288,              /* Vertical lines in (16 lines
 205                                  * skipped by the VFE) */
 206         0x8a, 288,              /* Vertical lines out (16 lines
 207                                  * skipped by the VFE) */
 208         0x8b, 16,               /* Horizontal begin */
 209         0x8c, 768,              /* Horizontal length */
 210         0x8d, 784,              /* Number of pixels
 211                                  * Must be >= Horizontal begin + Horizontal length */
 212         0x8f, 0xc00,            /* Disable window 2 */
 213         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 214                                  * mode, latch windows */
 215         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 216         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 217 };
 218
 219 static const unsigned short init_secam[] = {
 220         0x88, 23,               /* Window 1 vertical begin */
 221         0x89, 288,              /* Vertical lines in (16 lines
 222                                  * skipped by the VFE) */
 223         0x8a, 288,              /* Vertical lines out (16 lines
 224                                  * skipped by the VFE) */
 225         0x8b, 16,               /* Horizontal begin */
 226         0x8c, 768,              /* Horizontal length */
 227         0x8d, 784,              /* Number of pixels
 228                                  * Must be >= Horizontal begin + Horizontal length */
 229         0x8f, 0xc00,            /* Disable window 2 */
 230         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 231                                  * mode, latch windows */
 232         0xf2, 0x3d5,            /* SECAM, composite input */
 233         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 234 };
 235
 236 static const unsigned char init_common[] = {
 237         0xf2, 0x00,             /* Disable all outputs */
 238         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 239                                  * (clamp off) */
 240         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 241                                  * pulse = 2, Odd/Even flag */
 242         0x20, 0x03,             /* IF compensation 0dB/oct */
 243         0xe0, 0xff,             /* Open up all comparators */
 244         0xe1, 0x00,
 245         0xe2, 0x7f,
 246         0xe3, 0x80,
 247         0xe4, 0x7f,
 248         0xe5, 0x80,
 249         0xe6, 0x00,             /* Brightness set to 0 */
 250         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 251                                  * 10 to 8 2-bit error diffusion */
 252         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 253                                  * ... (p.32) */
 254         0xea, 0x18,             /* LLC2 connected, output FIFO
 255                                  * reset with VACTintern */
 256         0xf0, 0x8a,             /* Half full level to 10, bus
 257                                  * shuffler [7:0, 23:16, 15:8] */
 258         0xf1, 0x18,             /* Single clock, sync mode, no
 259                                  * FE delay, no HLEN counter */
 260         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 261                                  * strength to 2 */
 262         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 263                                  * ALPHA strength to 4 */
 264 };
 265
 266 static const unsigned short init_fp[] = {
 267         0x59, 0,
 268         0xa0, 2070,             /* ACC reference */
 269         0xa3, 0,
 270         0xa4, 0,
 271         0xa8, 30,
 272         0xb2, 768,
 273         0xbe, 27,
 274         0x58, 0,
 275         0x26, 0,
 276         0x4b, 0x298,            /* PLL gain */
 277 };
 278
 279
 280 static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
 281 {
 282         struct vpx3220 *decoder = to_vpx3220(sd);
 283
 284         vpx3220_write_block(sd, init_common, sizeof(init_common));
 285         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 286         if (decoder->norm & V4L2_STD_NTSC)
 287                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 288         else if (decoder->norm & V4L2_STD_PAL)
 289                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 290         else if (decoder->norm & V4L2_STD_SECAM)
 291                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 292         else
 293                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 294         return 0;
 295 }
 296
 297 static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 298 {
 299         int res = V4L2_IN_ST_NO_SIGNAL, status;
 300         v4l2_std_id std = 0;
 301
 302         status = vpx3220_fp_read(sd, 0x0f3);
 303
 304         v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
 305
 306         if (status < 0)
 307                 return status;
 308
 309         if ((status & 0x20) == 0) {
 310                 res = 0;
 311
 312                 switch (status & 0x18) {
 313                 case 0x00:
 314                 case 0x10:
 315                 case 0x14:
 316                 case 0x18:
 317                         std = V4L2_STD_PAL;
 318                         break;
 319
 320                 case 0x08:
 321                         std = V4L2_STD_SECAM;
 322                         break;
 323
 324                 case 0x04:
 325                 case 0x0c:
 326                 case 0x1c:
 327                         std = V4L2_STD_NTSC;
 328                         break;
 329                 }
 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 static int vpx3220_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 446 {
 447         struct vpx3220 *decoder = to_vpx3220(sd);
 448         struct i2c_client *client = v4l2_get_subdevdata(sd);
 449
 450         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 451 }
 452
 453 /* ----------------------------------------------------------------------- */
 454
 455 static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {
 456         .s_ctrl = vpx3220_s_ctrl,
 457 };
 458
 459 static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
 460         .g_chip_ident = vpx3220_g_chip_ident,
 461         .init = vpx3220_init,
 462         .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
 463         .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
 464         .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
 465         .g_ctrl = v4l2_subdev_g_ctrl,
 466         .s_ctrl = v4l2_subdev_s_ctrl,
 467         .queryctrl = v4l2_subdev_queryctrl,
 468         .querymenu = v4l2_subdev_querymenu,
 469         .s_std = vpx3220_s_std,
 470 };
 471
 472 static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
 473         .s_routing = vpx3220_s_routing,
 474         .s_stream = vpx3220_s_stream,
 475         .querystd = vpx3220_querystd,
 476         .g_input_status = vpx3220_g_input_status,
 477 };
 478
 479 static const struct v4l2_subdev_ops vpx3220_ops = {
 480         .core = &vpx3220_core_ops,
 481         .video = &vpx3220_video_ops,
 482 };
 483
 484 /* -----------------------------------------------------------------------
 485  * Client management code
 486  */
 487
 488 static int vpx3220_probe(struct i2c_client *client,
 489                         const struct i2c_device_id *id)
 490 {
 491         struct vpx3220 *decoder;
 492         struct v4l2_subdev *sd;
 493         const char *name = NULL;
 494         u8 ver;
 495         u16 pn;
 496
 497         /* Check if the adapter supports the needed features */
 498         if (!i2c_check_functionality(client->adapter,
 499                 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 500                 return -ENODEV;
 501
 502         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
 503         if (decoder == NULL)
 504                 return -ENOMEM;
 505         sd = &decoder->sd;
 506         v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
 507         decoder->norm = V4L2_STD_PAL;
 508         decoder->input = 0;
 509         decoder->enable = 1;
 510         v4l2_ctrl_handler_init(&decoder->hdl, 4);
 511         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 512                 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
 513         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 514                 V4L2_CID_CONTRAST, 0, 63, 1, 32);
 515         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 516                 V4L2_CID_SATURATION, 0, 4095, 1, 2048);
 517         v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
 518                 V4L2_CID_HUE, -512, 511, 1, 0);
 519         sd->ctrl_handler = &decoder->hdl;
 520         if (decoder->hdl.error) {
 521                 int err = decoder->hdl.error;
 522
 523                 v4l2_ctrl_handler_free(&decoder->hdl);
 524                 kfree(decoder);
 525                 return err;
 526         }
 527         v4l2_ctrl_handler_setup(&decoder->hdl);
 528
 529         ver = i2c_smbus_read_byte_data(client, 0x00);
 530         pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
 531                 i2c_smbus_read_byte_data(client, 0x01);
 532         decoder->ident = V4L2_IDENT_VPX3220A;
 533         if (ver == 0xec) {
 534                 switch (pn) {
 535                 case 0x4680:
 536                         name = "vpx3220a";
 537                         break;
 538                 case 0x4260:
 539                         name = "vpx3216b";
 540                         decoder->ident = V4L2_IDENT_VPX3216B;
 541                         break;
 542                 case 0x4280:
 543                         name = "vpx3214c";
 544                         decoder->ident = V4L2_IDENT_VPX3214C;
 545                         break;
 546                 }
 547         }
 548         if (name)
 549                 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
 550                         client->addr << 1, client->adapter->name);
 551         else
 552                 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
 553                         ver, pn, client->addr << 1, client->adapter->name);
 554
 555         vpx3220_write_block(sd, init_common, sizeof(init_common));
 556         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 557         /* Default to PAL */
 558         vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 559         return 0;
 560 }
 561
 562 static int vpx3220_remove(struct i2c_client *client)
 563 {
 564         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 565         struct vpx3220 *decoder = to_vpx3220(sd);
 566
 567         v4l2_device_unregister_subdev(sd);
 568         v4l2_ctrl_handler_free(&decoder->hdl);
 569         kfree(decoder);
 570         return 0;
 571 }
 572
 573 static const struct i2c_device_id vpx3220_id[] = {
 574         { "vpx3220a", 0 },
 575         { "vpx3216b", 0 },
 576         { "vpx3214c", 0 },
 577         { }
 578 };
 579 MODULE_DEVICE_TABLE(i2c, vpx3220_id);
 580
 581 static struct i2c_driver vpx3220_driver = {
 582         .driver = {
 583                 .owner  = THIS_MODULE,
 584                 .name   = "vpx3220",
 585         },
 586         .probe          = vpx3220_probe,
 587         .remove         = vpx3220_remove,
 588         .id_table       = vpx3220_id,
 589 };
 590
 591 static __init int init_vpx3220(void)
 592 {
 593         return i2c_add_driver(&vpx3220_driver);
 594 }
 595
 596 static __exit void exit_vpx3220(void)
 597 {
 598         i2c_del_driver(&vpx3220_driver);
 599 }
 600
 601 module_init(init_vpx3220);
 602 module_exit(exit_vpx3220);