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