drivers/media/platform/davinci/vpif.c

   1 /*
   2  * vpif - Video Port Interface driver
   3  * VPIF is a receiver and transmitter for video data. It has two channels(0, 1)
   4  * that receiveing video byte stream and two channels(2, 3) for video output.
   5  * The hardware supports SDTV, HDTV formats, raw data capture.
   6  * Currently, the driver supports NTSC and PAL standards.
   7  *
   8  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation version 2.
  13  *
  14  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  15  * kind, whether express or implied; without even the implied warranty
  16  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/kernel.h>
  25 #include <linux/io.h>
  26 #include <linux/clk.h>
  27 #include <linux/err.h>
  28 #include <linux/v4l2-dv-timings.h>
  29
  30 #include <mach/hardware.h>
  31
  32 #include "vpif.h"
  33
  34 MODULE_DESCRIPTION("TI DaVinci Video Port Interface driver");
  35 MODULE_LICENSE("GPL");
  36
  37 #define VPIF_CH0_MAX_MODES      (22)
  38 #define VPIF_CH1_MAX_MODES      (02)
  39 #define VPIF_CH2_MAX_MODES      (15)
  40 #define VPIF_CH3_MAX_MODES      (02)
  41
  42 static resource_size_t  res_len;
  43 static struct resource  *res;
  44 spinlock_t vpif_lock;
  45
  46 void __iomem *vpif_base;
  47 struct clk *vpif_clk;
  48
  49 /**
  50  * ch_params: video standard configuration parameters for vpif
  51  * The table must include all presets from supported subdevices.
  52  */
  53 const struct vpif_channel_config_params ch_params[] = {
  54         /* HDTV formats */
  55         {
  56                 .name = "480p59_94",
  57                 .width = 720,
  58                 .height = 480,
  59                 .frm_fmt = 1,
  60                 .ycmux_mode = 0,
  61                 .eav2sav = 138-8,
  62                 .sav2eav = 720,
  63                 .l1 = 1,
  64                 .l3 = 43,
  65                 .l5 = 523,
  66                 .vsize = 525,
  67                 .capture_format = 0,
  68                 .vbi_supported = 0,
  69                 .hd_sd = 1,
  70                 .dv_timings = V4L2_DV_BT_CEA_720X480P59_94,
  71         },
  72         {
  73                 .name = "576p50",
  74                 .width = 720,
  75                 .height = 576,
  76                 .frm_fmt = 1,
  77                 .ycmux_mode = 0,
  78                 .eav2sav = 144-8,
  79                 .sav2eav = 720,
  80                 .l1 = 1,
  81                 .l3 = 45,
  82                 .l5 = 621,
  83                 .vsize = 625,
  84                 .capture_format = 0,
  85                 .vbi_supported = 0,
  86                 .hd_sd = 1,
  87                 .dv_timings = V4L2_DV_BT_CEA_720X576P50,
  88         },
  89         {
  90                 .name = "720p50",
  91                 .width = 1280,
  92                 .height = 720,
  93                 .frm_fmt = 1,
  94                 .ycmux_mode = 0,
  95                 .eav2sav = 700-8,
  96                 .sav2eav = 1280,
  97                 .l1 = 1,
  98                 .l3 = 26,
  99                 .l5 = 746,
 100                 .vsize = 750,
 101                 .capture_format = 0,
 102                 .vbi_supported = 0,
 103                 .hd_sd = 1,
 104                 .dv_timings = V4L2_DV_BT_CEA_1280X720P50,
 105         },
 106         {
 107                 .name = "720p60",
 108                 .width = 1280,
 109                 .height = 720,
 110                 .frm_fmt = 1,
 111                 .ycmux_mode = 0,
 112                 .eav2sav = 370 - 8,
 113                 .sav2eav = 1280,
 114                 .l1 = 1,
 115                 .l3 = 26,
 116                 .l5 = 746,
 117                 .vsize = 750,
 118                 .capture_format = 0,
 119                 .vbi_supported = 0,
 120                 .hd_sd = 1,
 121                 .dv_timings = V4L2_DV_BT_CEA_1280X720P60,
 122         },
 123         {
 124                 .name = "1080I50",
 125                 .width = 1920,
 126                 .height = 1080,
 127                 .frm_fmt = 0,
 128                 .ycmux_mode = 0,
 129                 .eav2sav = 720 - 8,
 130                 .sav2eav = 1920,
 131                 .l1 = 1,
 132                 .l3 = 21,
 133                 .l5 = 561,
 134                 .l7 = 563,
 135                 .l9 = 584,
 136                 .l11 = 1124,
 137                 .vsize = 1125,
 138                 .capture_format = 0,
 139                 .vbi_supported = 0,
 140                 .hd_sd = 1,
 141                 .dv_timings = V4L2_DV_BT_CEA_1920X1080I50,
 142         },
 143         {
 144                 .name = "1080I60",
 145                 .width = 1920,
 146                 .height = 1080,
 147                 .frm_fmt = 0,
 148                 .ycmux_mode = 0,
 149                 .eav2sav = 280 - 8,
 150                 .sav2eav = 1920,
 151                 .l1 = 1,
 152                 .l3 = 21,
 153                 .l5 = 561,
 154                 .l7 = 563,
 155                 .l9 = 584,
 156                 .l11 = 1124,
 157                 .vsize = 1125,
 158                 .capture_format = 0,
 159                 .vbi_supported = 0,
 160                 .hd_sd = 1,
 161                 .dv_timings = V4L2_DV_BT_CEA_1920X1080I60,
 162         },
 163         {
 164                 .name = "1080p60",
 165                 .width = 1920,
 166                 .height = 1080,
 167                 .frm_fmt = 1,
 168                 .ycmux_mode = 0,
 169                 .eav2sav = 280 - 8,
 170                 .sav2eav = 1920,
 171                 .l1 = 1,
 172                 .l3 = 42,
 173                 .l5 = 1122,
 174                 .vsize = 1125,
 175                 .capture_format = 0,
 176                 .vbi_supported = 0,
 177                 .hd_sd = 1,
 178                 .dv_timings = V4L2_DV_BT_CEA_1920X1080P60,
 179         },
 180
 181         /* SDTV formats */
 182         {
 183                 .name = "NTSC_M",
 184                 .width = 720,
 185                 .height = 480,
 186                 .frm_fmt = 0,
 187                 .ycmux_mode = 1,
 188                 .eav2sav = 268,
 189                 .sav2eav = 1440,
 190                 .l1 = 1,
 191                 .l3 = 23,
 192                 .l5 = 263,
 193                 .l7 = 266,
 194                 .l9 = 286,
 195                 .l11 = 525,
 196                 .vsize = 525,
 197                 .capture_format = 0,
 198                 .vbi_supported = 1,
 199                 .hd_sd = 0,
 200                 .stdid = V4L2_STD_525_60,
 201         },
 202         {
 203                 .name = "PAL_BDGHIK",
 204                 .width = 720,
 205                 .height = 576,
 206                 .frm_fmt = 0,
 207                 .ycmux_mode = 1,
 208                 .eav2sav = 280,
 209                 .sav2eav = 1440,
 210                 .l1 = 1,
 211                 .l3 = 23,
 212                 .l5 = 311,
 213                 .l7 = 313,
 214                 .l9 = 336,
 215                 .l11 = 624,
 216                 .vsize = 625,
 217                 .capture_format = 0,
 218                 .vbi_supported = 1,
 219                 .hd_sd = 0,
 220                 .stdid = V4L2_STD_625_50,
 221         },
 222 };
 223
 224 const unsigned int vpif_ch_params_count = ARRAY_SIZE(ch_params);
 225
 226 static inline void vpif_wr_bit(u32 reg, u32 bit, u32 val)
 227 {
 228         if (val)
 229                 vpif_set_bit(reg, bit);
 230         else
 231                 vpif_clr_bit(reg, bit);
 232 }
 233
 234 /* This structure is used to keep track of VPIF size register's offsets */
 235 struct vpif_registers {
 236         u32 h_cfg, v_cfg_00, v_cfg_01, v_cfg_02, v_cfg, ch_ctrl;
 237         u32 line_offset, vanc0_strt, vanc0_size, vanc1_strt;
 238         u32 vanc1_size, width_mask, len_mask;
 239         u8 max_modes;
 240 };
 241
 242 static const struct vpif_registers vpifregs[VPIF_NUM_CHANNELS] = {
 243         /* Channel0 */
 244         {
 245                 VPIF_CH0_H_CFG, VPIF_CH0_V_CFG_00, VPIF_CH0_V_CFG_01,
 246                 VPIF_CH0_V_CFG_02, VPIF_CH0_V_CFG_03, VPIF_CH0_CTRL,
 247                 VPIF_CH0_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 248                 VPIF_CH0_MAX_MODES,
 249         },
 250         /* Channel1 */
 251         {
 252                 VPIF_CH1_H_CFG, VPIF_CH1_V_CFG_00, VPIF_CH1_V_CFG_01,
 253                 VPIF_CH1_V_CFG_02, VPIF_CH1_V_CFG_03, VPIF_CH1_CTRL,
 254                 VPIF_CH1_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 255                 VPIF_CH1_MAX_MODES,
 256         },
 257         /* Channel2 */
 258         {
 259                 VPIF_CH2_H_CFG, VPIF_CH2_V_CFG_00, VPIF_CH2_V_CFG_01,
 260                 VPIF_CH2_V_CFG_02, VPIF_CH2_V_CFG_03, VPIF_CH2_CTRL,
 261                 VPIF_CH2_IMG_ADD_OFST, VPIF_CH2_VANC0_STRT, VPIF_CH2_VANC0_SIZE,
 262                 VPIF_CH2_VANC1_STRT, VPIF_CH2_VANC1_SIZE, 0x7FF, 0x7FF,
 263                 VPIF_CH2_MAX_MODES
 264         },
 265         /* Channel3 */
 266         {
 267                 VPIF_CH3_H_CFG, VPIF_CH3_V_CFG_00, VPIF_CH3_V_CFG_01,
 268                 VPIF_CH3_V_CFG_02, VPIF_CH3_V_CFG_03, VPIF_CH3_CTRL,
 269                 VPIF_CH3_IMG_ADD_OFST, VPIF_CH3_VANC0_STRT, VPIF_CH3_VANC0_SIZE,
 270                 VPIF_CH3_VANC1_STRT, VPIF_CH3_VANC1_SIZE, 0x7FF, 0x7FF,
 271                 VPIF_CH3_MAX_MODES
 272         },
 273 };
 274
 275 /* vpif_set_mode_info:
 276  * This function is used to set horizontal and vertical config parameters
 277  * As per the standard in the channel, configure the values of L1, L3,
 278  * L5, L7  L9, L11 in VPIF Register , also write width and height
 279  */
 280 static void vpif_set_mode_info(const struct vpif_channel_config_params *config,
 281                                 u8 channel_id, u8 config_channel_id)
 282 {
 283         u32 value;
 284
 285         value = (config->eav2sav & vpifregs[config_channel_id].width_mask);
 286         value <<= VPIF_CH_LEN_SHIFT;
 287         value |= (config->sav2eav & vpifregs[config_channel_id].width_mask);
 288         regw(value, vpifregs[channel_id].h_cfg);
 289
 290         value = (config->l1 & vpifregs[config_channel_id].len_mask);
 291         value <<= VPIF_CH_LEN_SHIFT;
 292         value |= (config->l3 & vpifregs[config_channel_id].len_mask);
 293         regw(value, vpifregs[channel_id].v_cfg_00);
 294
 295         value = (config->l5 & vpifregs[config_channel_id].len_mask);
 296         value <<= VPIF_CH_LEN_SHIFT;
 297         value |= (config->l7 & vpifregs[config_channel_id].len_mask);
 298         regw(value, vpifregs[channel_id].v_cfg_01);
 299
 300         value = (config->l9 & vpifregs[config_channel_id].len_mask);
 301         value <<= VPIF_CH_LEN_SHIFT;
 302         value |= (config->l11 & vpifregs[config_channel_id].len_mask);
 303         regw(value, vpifregs[channel_id].v_cfg_02);
 304
 305         value = (config->vsize & vpifregs[config_channel_id].len_mask);
 306         regw(value, vpifregs[channel_id].v_cfg);
 307 }
 308
 309 /* config_vpif_params
 310  * Function to set the parameters of a channel
 311  * Mainly modifies the channel ciontrol register
 312  * It sets frame format, yc mux mode
 313  */
 314 static void config_vpif_params(struct vpif_params *vpifparams,
 315                                 u8 channel_id, u8 found)
 316 {
 317         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 318         u32 value, ch_nip, reg;
 319         u8 start, end;
 320         int i;
 321
 322         start = channel_id;
 323         end = channel_id + found;
 324
 325         for (i = start; i < end; i++) {
 326                 reg = vpifregs[i].ch_ctrl;
 327                 if (channel_id < 2)
 328                         ch_nip = VPIF_CAPTURE_CH_NIP;
 329                 else
 330                         ch_nip = VPIF_DISPLAY_CH_NIP;
 331
 332                 vpif_wr_bit(reg, ch_nip, config->frm_fmt);
 333                 vpif_wr_bit(reg, VPIF_CH_YC_MUX_BIT, config->ycmux_mode);
 334                 vpif_wr_bit(reg, VPIF_CH_INPUT_FIELD_FRAME_BIT,
 335                                         vpifparams->video_params.storage_mode);
 336
 337                 /* Set raster scanning SDR Format */
 338                 vpif_clr_bit(reg, VPIF_CH_SDR_FMT_BIT);
 339                 vpif_wr_bit(reg, VPIF_CH_DATA_MODE_BIT, config->capture_format);
 340
 341                 if (channel_id > 1)     /* Set the Pixel enable bit */
 342                         vpif_set_bit(reg, VPIF_DISPLAY_PIX_EN_BIT);
 343                 else if (config->capture_format) {
 344                         /* Set the polarity of various pins */
 345                         vpif_wr_bit(reg, VPIF_CH_FID_POLARITY_BIT,
 346                                         vpifparams->iface.fid_pol);
 347                         vpif_wr_bit(reg, VPIF_CH_V_VALID_POLARITY_BIT,
 348                                         vpifparams->iface.vd_pol);
 349                         vpif_wr_bit(reg, VPIF_CH_H_VALID_POLARITY_BIT,
 350                                         vpifparams->iface.hd_pol);
 351
 352                         value = regr(reg);
 353                         /* Set data width */
 354                         value &= ~(0x3u <<
 355                                         VPIF_CH_DATA_WIDTH_BIT);
 356                         value |= ((vpifparams->params.data_sz) <<
 357                                                      VPIF_CH_DATA_WIDTH_BIT);
 358                         regw(value, reg);
 359                 }
 360
 361                 /* Write the pitch in the driver */
 362                 regw((vpifparams->video_params.hpitch),
 363                                                 vpifregs[i].line_offset);
 364         }
 365 }
 366
 367 /* vpif_set_video_params
 368  * This function is used to set video parameters in VPIF register
 369  */
 370 int vpif_set_video_params(struct vpif_params *vpifparams, u8 channel_id)
 371 {
 372         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 373         int found = 1;
 374
 375         vpif_set_mode_info(config, channel_id, channel_id);
 376         if (!config->ycmux_mode) {
 377                 /* YC are on separate channels (HDTV formats) */
 378                 vpif_set_mode_info(config, channel_id + 1, channel_id);
 379                 found = 2;
 380         }
 381
 382         config_vpif_params(vpifparams, channel_id, found);
 383
 384         regw(0x80, VPIF_REQ_SIZE);
 385         regw(0x01, VPIF_EMULATION_CTRL);
 386
 387         return found;
 388 }
 389 EXPORT_SYMBOL(vpif_set_video_params);
 390
 391 void vpif_set_vbi_display_params(struct vpif_vbi_params *vbiparams,
 392                                 u8 channel_id)
 393 {
 394         u32 value;
 395
 396         value = 0x3F8 & (vbiparams->hstart0);
 397         value |= 0x3FFFFFF & ((vbiparams->vstart0) << 16);
 398         regw(value, vpifregs[channel_id].vanc0_strt);
 399
 400         value = 0x3F8 & (vbiparams->hstart1);
 401         value |= 0x3FFFFFF & ((vbiparams->vstart1) << 16);
 402         regw(value, vpifregs[channel_id].vanc1_strt);
 403
 404         value = 0x3F8 & (vbiparams->hsize0);
 405         value |= 0x3FFFFFF & ((vbiparams->vsize0) << 16);
 406         regw(value, vpifregs[channel_id].vanc0_size);
 407
 408         value = 0x3F8 & (vbiparams->hsize1);
 409         value |= 0x3FFFFFF & ((vbiparams->vsize1) << 16);
 410         regw(value, vpifregs[channel_id].vanc1_size);
 411
 412 }
 413 EXPORT_SYMBOL(vpif_set_vbi_display_params);
 414
 415 int vpif_channel_getfid(u8 channel_id)
 416 {
 417         return (regr(vpifregs[channel_id].ch_ctrl) & VPIF_CH_FID_MASK)
 418                                         >> VPIF_CH_FID_SHIFT;
 419 }
 420 EXPORT_SYMBOL(vpif_channel_getfid);
 421
 422 static int vpif_probe(struct platform_device *pdev)
 423 {
 424         int status = 0;
 425
 426         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 427         if (!res)
 428                 return -ENOENT;
 429
 430         res_len = resource_size(res);
 431
 432         res = request_mem_region(res->start, res_len, res->name);
 433         if (!res)
 434                 return -EBUSY;
 435
 436         vpif_base = ioremap(res->start, res_len);
 437         if (!vpif_base) {
 438                 status = -EBUSY;
 439                 goto fail;
 440         }
 441
 442         vpif_clk = clk_get(&pdev->dev, "vpif");
 443         if (IS_ERR(vpif_clk)) {
 444                 status = PTR_ERR(vpif_clk);
 445                 goto clk_fail;
 446         }
 447         clk_prepare_enable(vpif_clk);
 448
 449         spin_lock_init(&vpif_lock);
 450         dev_info(&pdev->dev, "vpif probe success\n");
 451         return 0;
 452
 453 clk_fail:
 454         iounmap(vpif_base);
 455 fail:
 456         release_mem_region(res->start, res_len);
 457         return status;
 458 }
 459
 460 static int vpif_remove(struct platform_device *pdev)
 461 {
 462         if (vpif_clk) {
 463                 clk_disable_unprepare(vpif_clk);
 464                 clk_put(vpif_clk);
 465         }
 466
 467         iounmap(vpif_base);
 468         release_mem_region(res->start, res_len);
 469         return 0;
 470 }
 471
 472 #ifdef CONFIG_PM
 473 static int vpif_suspend(struct device *dev)
 474 {
 475         clk_disable_unprepare(vpif_clk);
 476         return 0;
 477 }
 478
 479 static int vpif_resume(struct device *dev)
 480 {
 481         clk_prepare_enable(vpif_clk);
 482         return 0;
 483 }
 484
 485 static const struct dev_pm_ops vpif_pm = {
 486         .suspend        = vpif_suspend,
 487         .resume         = vpif_resume,
 488 };
 489
 490 #define vpif_pm_ops (&vpif_pm)
 491 #else
 492 #define vpif_pm_ops NULL
 493 #endif
 494
 495 static struct platform_driver vpif_driver = {
 496         .driver = {
 497                 .name   = "vpif",
 498                 .owner = THIS_MODULE,
 499                 .pm     = vpif_pm_ops,
 500         },
 501         .remove = vpif_remove,
 502         .probe = vpif_probe,
 503 };
 504
 505 static void vpif_exit(void)
 506 {
 507         platform_driver_unregister(&vpif_driver);
 508 }
 509
 510 static int __init vpif_init(void)
 511 {
 512         return platform_driver_register(&vpif_driver);
 513 }
 514 subsys_initcall(vpif_init);
 515 module_exit(vpif_exit);
 516