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 receiving 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 - https://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 #include <linux/of_graph.h>
  30
  31 #include "vpif.h"
  32
  33 MODULE_DESCRIPTION("TI DaVinci Video Port Interface driver");
  34 MODULE_LICENSE("GPL");
  35
  36 #define VPIF_DRIVER_NAME        "vpif"
  37 MODULE_ALIAS("platform:" VPIF_DRIVER_NAME);
  38
  39 #define VPIF_CH0_MAX_MODES      22
  40 #define VPIF_CH1_MAX_MODES      2
  41 #define VPIF_CH2_MAX_MODES      15
  42 #define VPIF_CH3_MAX_MODES      2
  43
  44 spinlock_t vpif_lock;
  45 EXPORT_SYMBOL_GPL(vpif_lock);
  46
  47 void __iomem *vpif_base;
  48 EXPORT_SYMBOL_GPL(vpif_base);
  49
  50 /*
  51  * vpif_ch_params: video standard configuration parameters for vpif
  52  *
  53  * The table must include all presets from supported subdevices.
  54  */
  55 const struct vpif_channel_config_params vpif_ch_params[] = {
  56         /* HDTV formats */
  57         {
  58                 .name = "480p59_94",
  59                 .width = 720,
  60                 .height = 480,
  61                 .frm_fmt = 1,
  62                 .ycmux_mode = 0,
  63                 .eav2sav = 138-8,
  64                 .sav2eav = 720,
  65                 .l1 = 1,
  66                 .l3 = 43,
  67                 .l5 = 523,
  68                 .vsize = 525,
  69                 .capture_format = 0,
  70                 .vbi_supported = 0,
  71                 .hd_sd = 1,
  72                 .dv_timings = V4L2_DV_BT_CEA_720X480P59_94,
  73         },
  74         {
  75                 .name = "576p50",
  76                 .width = 720,
  77                 .height = 576,
  78                 .frm_fmt = 1,
  79                 .ycmux_mode = 0,
  80                 .eav2sav = 144-8,
  81                 .sav2eav = 720,
  82                 .l1 = 1,
  83                 .l3 = 45,
  84                 .l5 = 621,
  85                 .vsize = 625,
  86                 .capture_format = 0,
  87                 .vbi_supported = 0,
  88                 .hd_sd = 1,
  89                 .dv_timings = V4L2_DV_BT_CEA_720X576P50,
  90         },
  91         {
  92                 .name = "720p50",
  93                 .width = 1280,
  94                 .height = 720,
  95                 .frm_fmt = 1,
  96                 .ycmux_mode = 0,
  97                 .eav2sav = 700-8,
  98                 .sav2eav = 1280,
  99                 .l1 = 1,
 100                 .l3 = 26,
 101                 .l5 = 746,
 102                 .vsize = 750,
 103                 .capture_format = 0,
 104                 .vbi_supported = 0,
 105                 .hd_sd = 1,
 106                 .dv_timings = V4L2_DV_BT_CEA_1280X720P50,
 107         },
 108         {
 109                 .name = "720p60",
 110                 .width = 1280,
 111                 .height = 720,
 112                 .frm_fmt = 1,
 113                 .ycmux_mode = 0,
 114                 .eav2sav = 370 - 8,
 115                 .sav2eav = 1280,
 116                 .l1 = 1,
 117                 .l3 = 26,
 118                 .l5 = 746,
 119                 .vsize = 750,
 120                 .capture_format = 0,
 121                 .vbi_supported = 0,
 122                 .hd_sd = 1,
 123                 .dv_timings = V4L2_DV_BT_CEA_1280X720P60,
 124         },
 125         {
 126                 .name = "1080I50",
 127                 .width = 1920,
 128                 .height = 1080,
 129                 .frm_fmt = 0,
 130                 .ycmux_mode = 0,
 131                 .eav2sav = 720 - 8,
 132                 .sav2eav = 1920,
 133                 .l1 = 1,
 134                 .l3 = 21,
 135                 .l5 = 561,
 136                 .l7 = 563,
 137                 .l9 = 584,
 138                 .l11 = 1124,
 139                 .vsize = 1125,
 140                 .capture_format = 0,
 141                 .vbi_supported = 0,
 142                 .hd_sd = 1,
 143                 .dv_timings = V4L2_DV_BT_CEA_1920X1080I50,
 144         },
 145         {
 146                 .name = "1080I60",
 147                 .width = 1920,
 148                 .height = 1080,
 149                 .frm_fmt = 0,
 150                 .ycmux_mode = 0,
 151                 .eav2sav = 280 - 8,
 152                 .sav2eav = 1920,
 153                 .l1 = 1,
 154                 .l3 = 21,
 155                 .l5 = 561,
 156                 .l7 = 563,
 157                 .l9 = 584,
 158                 .l11 = 1124,
 159                 .vsize = 1125,
 160                 .capture_format = 0,
 161                 .vbi_supported = 0,
 162                 .hd_sd = 1,
 163                 .dv_timings = V4L2_DV_BT_CEA_1920X1080I60,
 164         },
 165         {
 166                 .name = "1080p60",
 167                 .width = 1920,
 168                 .height = 1080,
 169                 .frm_fmt = 1,
 170                 .ycmux_mode = 0,
 171                 .eav2sav = 280 - 8,
 172                 .sav2eav = 1920,
 173                 .l1 = 1,
 174                 .l3 = 42,
 175                 .l5 = 1122,
 176                 .vsize = 1125,
 177                 .capture_format = 0,
 178                 .vbi_supported = 0,
 179                 .hd_sd = 1,
 180                 .dv_timings = V4L2_DV_BT_CEA_1920X1080P60,
 181         },
 182
 183         /* SDTV formats */
 184         {
 185                 .name = "NTSC_M",
 186                 .width = 720,
 187                 .height = 480,
 188                 .frm_fmt = 0,
 189                 .ycmux_mode = 1,
 190                 .eav2sav = 268,
 191                 .sav2eav = 1440,
 192                 .l1 = 1,
 193                 .l3 = 23,
 194                 .l5 = 263,
 195                 .l7 = 266,
 196                 .l9 = 286,
 197                 .l11 = 525,
 198                 .vsize = 525,
 199                 .capture_format = 0,
 200                 .vbi_supported = 1,
 201                 .hd_sd = 0,
 202                 .stdid = V4L2_STD_525_60,
 203         },
 204         {
 205                 .name = "PAL_BDGHIK",
 206                 .width = 720,
 207                 .height = 576,
 208                 .frm_fmt = 0,
 209                 .ycmux_mode = 1,
 210                 .eav2sav = 280,
 211                 .sav2eav = 1440,
 212                 .l1 = 1,
 213                 .l3 = 23,
 214                 .l5 = 311,
 215                 .l7 = 313,
 216                 .l9 = 336,
 217                 .l11 = 624,
 218                 .vsize = 625,
 219                 .capture_format = 0,
 220                 .vbi_supported = 1,
 221                 .hd_sd = 0,
 222                 .stdid = V4L2_STD_625_50,
 223         },
 224 };
 225 EXPORT_SYMBOL_GPL(vpif_ch_params);
 226
 227 const unsigned int vpif_ch_params_count = ARRAY_SIZE(vpif_ch_params);
 228 EXPORT_SYMBOL_GPL(vpif_ch_params_count);
 229
 230 static inline void vpif_wr_bit(u32 reg, u32 bit, u32 val)
 231 {
 232         if (val)
 233                 vpif_set_bit(reg, bit);
 234         else
 235                 vpif_clr_bit(reg, bit);
 236 }
 237
 238 /* This structure is used to keep track of VPIF size register's offsets */
 239 struct vpif_registers {
 240         u32 h_cfg, v_cfg_00, v_cfg_01, v_cfg_02, v_cfg, ch_ctrl;
 241         u32 line_offset, vanc0_strt, vanc0_size, vanc1_strt;
 242         u32 vanc1_size, width_mask, len_mask;
 243         u8 max_modes;
 244 };
 245
 246 static const struct vpif_registers vpifregs[VPIF_NUM_CHANNELS] = {
 247         /* Channel0 */
 248         {
 249                 VPIF_CH0_H_CFG, VPIF_CH0_V_CFG_00, VPIF_CH0_V_CFG_01,
 250                 VPIF_CH0_V_CFG_02, VPIF_CH0_V_CFG_03, VPIF_CH0_CTRL,
 251                 VPIF_CH0_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 252                 VPIF_CH0_MAX_MODES,
 253         },
 254         /* Channel1 */
 255         {
 256                 VPIF_CH1_H_CFG, VPIF_CH1_V_CFG_00, VPIF_CH1_V_CFG_01,
 257                 VPIF_CH1_V_CFG_02, VPIF_CH1_V_CFG_03, VPIF_CH1_CTRL,
 258                 VPIF_CH1_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 259                 VPIF_CH1_MAX_MODES,
 260         },
 261         /* Channel2 */
 262         {
 263                 VPIF_CH2_H_CFG, VPIF_CH2_V_CFG_00, VPIF_CH2_V_CFG_01,
 264                 VPIF_CH2_V_CFG_02, VPIF_CH2_V_CFG_03, VPIF_CH2_CTRL,
 265                 VPIF_CH2_IMG_ADD_OFST, VPIF_CH2_VANC0_STRT, VPIF_CH2_VANC0_SIZE,
 266                 VPIF_CH2_VANC1_STRT, VPIF_CH2_VANC1_SIZE, 0x7FF, 0x7FF,
 267                 VPIF_CH2_MAX_MODES
 268         },
 269         /* Channel3 */
 270         {
 271                 VPIF_CH3_H_CFG, VPIF_CH3_V_CFG_00, VPIF_CH3_V_CFG_01,
 272                 VPIF_CH3_V_CFG_02, VPIF_CH3_V_CFG_03, VPIF_CH3_CTRL,
 273                 VPIF_CH3_IMG_ADD_OFST, VPIF_CH3_VANC0_STRT, VPIF_CH3_VANC0_SIZE,
 274                 VPIF_CH3_VANC1_STRT, VPIF_CH3_VANC1_SIZE, 0x7FF, 0x7FF,
 275                 VPIF_CH3_MAX_MODES
 276         },
 277 };
 278
 279 /* vpif_set_mode_info:
 280  * This function is used to set horizontal and vertical config parameters
 281  * As per the standard in the channel, configure the values of L1, L3,
 282  * L5, L7  L9, L11 in VPIF Register , also write width and height
 283  */
 284 static void vpif_set_mode_info(const struct vpif_channel_config_params *config,
 285                                 u8 channel_id, u8 config_channel_id)
 286 {
 287         u32 value;
 288
 289         value = (config->eav2sav & vpifregs[config_channel_id].width_mask);
 290         value <<= VPIF_CH_LEN_SHIFT;
 291         value |= (config->sav2eav & vpifregs[config_channel_id].width_mask);
 292         regw(value, vpifregs[channel_id].h_cfg);
 293
 294         value = (config->l1 & vpifregs[config_channel_id].len_mask);
 295         value <<= VPIF_CH_LEN_SHIFT;
 296         value |= (config->l3 & vpifregs[config_channel_id].len_mask);
 297         regw(value, vpifregs[channel_id].v_cfg_00);
 298
 299         value = (config->l5 & vpifregs[config_channel_id].len_mask);
 300         value <<= VPIF_CH_LEN_SHIFT;
 301         value |= (config->l7 & vpifregs[config_channel_id].len_mask);
 302         regw(value, vpifregs[channel_id].v_cfg_01);
 303
 304         value = (config->l9 & vpifregs[config_channel_id].len_mask);
 305         value <<= VPIF_CH_LEN_SHIFT;
 306         value |= (config->l11 & vpifregs[config_channel_id].len_mask);
 307         regw(value, vpifregs[channel_id].v_cfg_02);
 308
 309         value = (config->vsize & vpifregs[config_channel_id].len_mask);
 310         regw(value, vpifregs[channel_id].v_cfg);
 311 }
 312
 313 /* config_vpif_params
 314  * Function to set the parameters of a channel
 315  * Mainly modifies the channel ciontrol register
 316  * It sets frame format, yc mux mode
 317  */
 318 static void config_vpif_params(struct vpif_params *vpifparams,
 319                                 u8 channel_id, u8 found)
 320 {
 321         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 322         u32 value, ch_nip, reg;
 323         u8 start, end;
 324         int i;
 325
 326         start = channel_id;
 327         end = channel_id + found;
 328
 329         for (i = start; i < end; i++) {
 330                 reg = vpifregs[i].ch_ctrl;
 331                 if (channel_id < 2)
 332                         ch_nip = VPIF_CAPTURE_CH_NIP;
 333                 else
 334                         ch_nip = VPIF_DISPLAY_CH_NIP;
 335
 336                 vpif_wr_bit(reg, ch_nip, config->frm_fmt);
 337                 vpif_wr_bit(reg, VPIF_CH_YC_MUX_BIT, config->ycmux_mode);
 338                 vpif_wr_bit(reg, VPIF_CH_INPUT_FIELD_FRAME_BIT,
 339                                         vpifparams->video_params.storage_mode);
 340
 341                 /* Set raster scanning SDR Format */
 342                 vpif_clr_bit(reg, VPIF_CH_SDR_FMT_BIT);
 343                 vpif_wr_bit(reg, VPIF_CH_DATA_MODE_BIT, config->capture_format);
 344
 345                 if (channel_id > 1)     /* Set the Pixel enable bit */
 346                         vpif_set_bit(reg, VPIF_DISPLAY_PIX_EN_BIT);
 347                 else if (config->capture_format) {
 348                         /* Set the polarity of various pins */
 349                         vpif_wr_bit(reg, VPIF_CH_FID_POLARITY_BIT,
 350                                         vpifparams->iface.fid_pol);
 351                         vpif_wr_bit(reg, VPIF_CH_V_VALID_POLARITY_BIT,
 352                                         vpifparams->iface.vd_pol);
 353                         vpif_wr_bit(reg, VPIF_CH_H_VALID_POLARITY_BIT,
 354                                         vpifparams->iface.hd_pol);
 355
 356                         value = regr(reg);
 357                         /* Set data width */
 358                         value &= ~(0x3u <<
 359                                         VPIF_CH_DATA_WIDTH_BIT);
 360                         value |= ((vpifparams->params.data_sz) <<
 361                                                      VPIF_CH_DATA_WIDTH_BIT);
 362                         regw(value, reg);
 363                 }
 364
 365                 /* Write the pitch in the driver */
 366                 regw((vpifparams->video_params.hpitch),
 367                                                 vpifregs[i].line_offset);
 368         }
 369 }
 370
 371 /* vpif_set_video_params
 372  * This function is used to set video parameters in VPIF register
 373  */
 374 int vpif_set_video_params(struct vpif_params *vpifparams, u8 channel_id)
 375 {
 376         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 377         int found = 1;
 378
 379         vpif_set_mode_info(config, channel_id, channel_id);
 380         if (!config->ycmux_mode) {
 381                 /* YC are on separate channels (HDTV formats) */
 382                 vpif_set_mode_info(config, channel_id + 1, channel_id);
 383                 found = 2;
 384         }
 385
 386         config_vpif_params(vpifparams, channel_id, found);
 387
 388         regw(0x80, VPIF_REQ_SIZE);
 389         regw(0x01, VPIF_EMULATION_CTRL);
 390
 391         return found;
 392 }
 393 EXPORT_SYMBOL(vpif_set_video_params);
 394
 395 void vpif_set_vbi_display_params(struct vpif_vbi_params *vbiparams,
 396                                 u8 channel_id)
 397 {
 398         u32 value;
 399
 400         value = 0x3F8 & (vbiparams->hstart0);
 401         value |= 0x3FFFFFF & ((vbiparams->vstart0) << 16);
 402         regw(value, vpifregs[channel_id].vanc0_strt);
 403
 404         value = 0x3F8 & (vbiparams->hstart1);
 405         value |= 0x3FFFFFF & ((vbiparams->vstart1) << 16);
 406         regw(value, vpifregs[channel_id].vanc1_strt);
 407
 408         value = 0x3F8 & (vbiparams->hsize0);
 409         value |= 0x3FFFFFF & ((vbiparams->vsize0) << 16);
 410         regw(value, vpifregs[channel_id].vanc0_size);
 411
 412         value = 0x3F8 & (vbiparams->hsize1);
 413         value |= 0x3FFFFFF & ((vbiparams->vsize1) << 16);
 414         regw(value, vpifregs[channel_id].vanc1_size);
 415
 416 }
 417 EXPORT_SYMBOL(vpif_set_vbi_display_params);
 418
 419 int vpif_channel_getfid(u8 channel_id)
 420 {
 421         return (regr(vpifregs[channel_id].ch_ctrl) & VPIF_CH_FID_MASK)
 422                                         >> VPIF_CH_FID_SHIFT;
 423 }
 424 EXPORT_SYMBOL(vpif_channel_getfid);
 425
 426 static int vpif_probe(struct platform_device *pdev)
 427 {
 428         static struct resource  *res, *res_irq;
 429         struct platform_device *pdev_capture, *pdev_display;
 430         struct device_node *endpoint = NULL;
 431
 432         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 433         vpif_base = devm_ioremap_resource(&pdev->dev, res);
 434         if (IS_ERR(vpif_base))
 435                 return PTR_ERR(vpif_base);
 436
 437         pm_runtime_enable(&pdev->dev);
 438         pm_runtime_get(&pdev->dev);
 439
 440         spin_lock_init(&vpif_lock);
 441         dev_info(&pdev->dev, "vpif probe success\n");
 442
 443         /*
 444          * If VPIF Node has endpoints, assume "new" DT support,
 445          * where capture and display drivers don't have DT nodes
 446          * so their devices need to be registered manually here
 447          * for their legacy platform_drivers to work.
 448          */
 449         endpoint = of_graph_get_next_endpoint(pdev->dev.of_node,
 450                                               endpoint);
 451         if (!endpoint)
 452                 return 0;
 453
 454         /*
 455          * For DT platforms, manually create platform_devices for
 456          * capture/display drivers.
 457          */
 458         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 459         if (!res_irq) {
 460                 dev_warn(&pdev->dev, "Missing IRQ resource.\n");
 461                 pm_runtime_put(&pdev->dev);
 462                 return -EINVAL;
 463         }
 464
 465         pdev_capture = devm_kzalloc(&pdev->dev, sizeof(*pdev_capture),
 466                                     GFP_KERNEL);
 467         if (pdev_capture) {
 468                 pdev_capture->name = "vpif_capture";
 469                 pdev_capture->id = -1;
 470                 pdev_capture->resource = res_irq;
 471                 pdev_capture->num_resources = 1;
 472                 pdev_capture->dev.dma_mask = pdev->dev.dma_mask;
 473                 pdev_capture->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
 474                 pdev_capture->dev.parent = &pdev->dev;
 475                 platform_device_register(pdev_capture);
 476         } else {
 477                 dev_warn(&pdev->dev, "Unable to allocate memory for pdev_capture.\n");
 478         }
 479
 480         pdev_display = devm_kzalloc(&pdev->dev, sizeof(*pdev_display),
 481                                     GFP_KERNEL);
 482         if (pdev_display) {
 483                 pdev_display->name = "vpif_display";
 484                 pdev_display->id = -1;
 485                 pdev_display->resource = res_irq;
 486                 pdev_display->num_resources = 1;
 487                 pdev_display->dev.dma_mask = pdev->dev.dma_mask;
 488                 pdev_display->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
 489                 pdev_display->dev.parent = &pdev->dev;
 490                 platform_device_register(pdev_display);
 491         } else {
 492                 dev_warn(&pdev->dev, "Unable to allocate memory for pdev_display.\n");
 493         }
 494
 495         return 0;
 496 }
 497
 498 static int vpif_remove(struct platform_device *pdev)
 499 {
 500         pm_runtime_disable(&pdev->dev);
 501         return 0;
 502 }
 503
 504 #ifdef CONFIG_PM
 505 static int vpif_suspend(struct device *dev)
 506 {
 507         pm_runtime_put(dev);
 508         return 0;
 509 }
 510
 511 static int vpif_resume(struct device *dev)
 512 {
 513         pm_runtime_get(dev);
 514         return 0;
 515 }
 516
 517 static const struct dev_pm_ops vpif_pm = {
 518         .suspend        = vpif_suspend,
 519         .resume         = vpif_resume,
 520 };
 521
 522 #define vpif_pm_ops (&vpif_pm)
 523 #else
 524 #define vpif_pm_ops NULL
 525 #endif
 526
 527 #if IS_ENABLED(CONFIG_OF)
 528 static const struct of_device_id vpif_of_match[] = {
 529         { .compatible = "ti,da850-vpif", },
 530         { /* sentinel */ },
 531 };
 532 MODULE_DEVICE_TABLE(of, vpif_of_match);
 533 #endif
 534
 535 static struct platform_driver vpif_driver = {
 536         .driver = {
 537                 .of_match_table = of_match_ptr(vpif_of_match),
 538                 .name   = VPIF_DRIVER_NAME,
 539                 .pm     = vpif_pm_ops,
 540         },
 541         .remove = vpif_remove,
 542         .probe = vpif_probe,
 543 };
 544
 545 static void vpif_exit(void)
 546 {
 547         platform_driver_unregister(&vpif_driver);
 548 }
 549
 550 static int __init vpif_init(void)
 551 {
 552         return platform_driver_register(&vpif_driver);
 553 }
 554 subsys_initcall(vpif_init);
 555 module_exit(vpif_exit);
 556