drivers/media/video/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 <mach/hardware.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      (02)
  37 #define VPIF_CH2_MAX_MODES      (15)
  38 #define VPIF_CH3_MAX_MODES      (02)
  39
  40 static resource_size_t  res_len;
  41 static struct resource  *res;
  42 spinlock_t vpif_lock;
  43
  44 void __iomem *vpif_base;
  45 struct clk *vpif_clk;
  46
  47 /**
  48  * ch_params: video standard configuration parameters for vpif
  49  * The table must include all presets from supported subdevices.
  50  */
  51 const struct vpif_channel_config_params ch_params[] = {
  52         /* HDTV formats */
  53         {
  54                 .name = "480p59_94",
  55                 .width = 720,
  56                 .height = 480,
  57                 .frm_fmt = 1,
  58                 .ycmux_mode = 0,
  59                 .eav2sav = 138-8,
  60                 .sav2eav = 720,
  61                 .l1 = 1,
  62                 .l3 = 43,
  63                 .l5 = 523,
  64                 .vsize = 525,
  65                 .capture_format = 0,
  66                 .vbi_supported = 0,
  67                 .hd_sd = 1,
  68                 .dv_preset = V4L2_DV_480P59_94,
  69         },
  70         {
  71                 .name = "576p50",
  72                 .width = 720,
  73                 .height = 576,
  74                 .frm_fmt = 1,
  75                 .ycmux_mode = 0,
  76                 .eav2sav = 144-8,
  77                 .sav2eav = 720,
  78                 .l1 = 1,
  79                 .l3 = 45,
  80                 .l5 = 621,
  81                 .vsize = 625,
  82                 .capture_format = 0,
  83                 .vbi_supported = 0,
  84                 .hd_sd = 1,
  85                 .dv_preset = V4L2_DV_576P50,
  86         },
  87         {
  88                 .name = "720p50",
  89                 .width = 1280,
  90                 .height = 720,
  91                 .frm_fmt = 1,
  92                 .ycmux_mode = 0,
  93                 .eav2sav = 700-8,
  94                 .sav2eav = 1280,
  95                 .l1 = 1,
  96                 .l3 = 26,
  97                 .l5 = 746,
  98                 .vsize = 750,
  99                 .capture_format = 0,
 100                 .vbi_supported = 0,
 101                 .hd_sd = 1,
 102                 .dv_preset = V4L2_DV_720P50,
 103         },
 104         {
 105                 .name = "720p60",
 106                 .width = 1280,
 107                 .height = 720,
 108                 .frm_fmt = 1,
 109                 .ycmux_mode = 0,
 110                 .eav2sav = 370 - 8,
 111                 .sav2eav = 1280,
 112                 .l1 = 1,
 113                 .l3 = 26,
 114                 .l5 = 746,
 115                 .vsize = 750,
 116                 .capture_format = 0,
 117                 .vbi_supported = 0,
 118                 .hd_sd = 1,
 119                 .dv_preset = V4L2_DV_720P60,
 120         },
 121         {
 122                 .name = "1080I50",
 123                 .width = 1920,
 124                 .height = 1080,
 125                 .frm_fmt = 0,
 126                 .ycmux_mode = 0,
 127                 .eav2sav = 720 - 8,
 128                 .sav2eav = 1920,
 129                 .l1 = 1,
 130                 .l3 = 21,
 131                 .l5 = 561,
 132                 .l7 = 563,
 133                 .l9 = 584,
 134                 .l11 = 1124,
 135                 .vsize = 1125,
 136                 .capture_format = 0,
 137                 .vbi_supported = 0,
 138                 .hd_sd = 1,
 139                 .dv_preset = V4L2_DV_1080I50,
 140         },
 141         {
 142                 .name = "1080I60",
 143                 .width = 1920,
 144                 .height = 1080,
 145                 .frm_fmt = 0,
 146                 .ycmux_mode = 0,
 147                 .eav2sav = 280 - 8,
 148                 .sav2eav = 1920,
 149                 .l1 = 1,
 150                 .l3 = 21,
 151                 .l5 = 561,
 152                 .l7 = 563,
 153                 .l9 = 584,
 154                 .l11 = 1124,
 155                 .vsize = 1125,
 156                 .capture_format = 0,
 157                 .vbi_supported = 0,
 158                 .hd_sd = 1,
 159                 .dv_preset = V4L2_DV_1080I60,
 160         },
 161         {
 162                 .name = "1080p60",
 163                 .width = 1920,
 164                 .height = 1080,
 165                 .frm_fmt = 1,
 166                 .ycmux_mode = 0,
 167                 .eav2sav = 280 - 8,
 168                 .sav2eav = 1920,
 169                 .l1 = 1,
 170                 .l3 = 42,
 171                 .l5 = 1122,
 172                 .vsize = 1125,
 173                 .capture_format = 0,
 174                 .vbi_supported = 0,
 175                 .hd_sd = 1,
 176                 .dv_preset = V4L2_DV_1080P60,
 177         },
 178
 179         /* SDTV formats */
 180         {
 181                 .name = "NTSC_M",
 182                 .width = 720,
 183                 .height = 480,
 184                 .frm_fmt = 0,
 185                 .ycmux_mode = 1,
 186                 .eav2sav = 268,
 187                 .sav2eav = 1440,
 188                 .l1 = 1,
 189                 .l3 = 23,
 190                 .l5 = 263,
 191                 .l7 = 266,
 192                 .l9 = 286,
 193                 .l11 = 525,
 194                 .vsize = 525,
 195                 .capture_format = 0,
 196                 .vbi_supported = 1,
 197                 .hd_sd = 0,
 198                 .stdid = V4L2_STD_525_60,
 199         },
 200         {
 201                 .name = "PAL_BDGHIK",
 202                 .width = 720,
 203                 .height = 576,
 204                 .frm_fmt = 0,
 205                 .ycmux_mode = 1,
 206                 .eav2sav = 280,
 207                 .sav2eav = 1440,
 208                 .l1 = 1,
 209                 .l3 = 23,
 210                 .l5 = 311,
 211                 .l7 = 313,
 212                 .l9 = 336,
 213                 .l11 = 624,
 214                 .vsize = 625,
 215                 .capture_format = 0,
 216                 .vbi_supported = 1,
 217                 .hd_sd = 0,
 218                 .stdid = V4L2_STD_625_50,
 219         },
 220 };
 221
 222 const unsigned int vpif_ch_params_count = ARRAY_SIZE(ch_params);
 223
 224 static inline void vpif_wr_bit(u32 reg, u32 bit, u32 val)
 225 {
 226         if (val)
 227                 vpif_set_bit(reg, bit);
 228         else
 229                 vpif_clr_bit(reg, bit);
 230 }
 231
 232 /* This structure is used to keep track of VPIF size register's offsets */
 233 struct vpif_registers {
 234         u32 h_cfg, v_cfg_00, v_cfg_01, v_cfg_02, v_cfg, ch_ctrl;
 235         u32 line_offset, vanc0_strt, vanc0_size, vanc1_strt;
 236         u32 vanc1_size, width_mask, len_mask;
 237         u8 max_modes;
 238 };
 239
 240 static const struct vpif_registers vpifregs[VPIF_NUM_CHANNELS] = {
 241         /* Channel0 */
 242         {
 243                 VPIF_CH0_H_CFG, VPIF_CH0_V_CFG_00, VPIF_CH0_V_CFG_01,
 244                 VPIF_CH0_V_CFG_02, VPIF_CH0_V_CFG_03, VPIF_CH0_CTRL,
 245                 VPIF_CH0_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 246                 VPIF_CH0_MAX_MODES,
 247         },
 248         /* Channel1 */
 249         {
 250                 VPIF_CH1_H_CFG, VPIF_CH1_V_CFG_00, VPIF_CH1_V_CFG_01,
 251                 VPIF_CH1_V_CFG_02, VPIF_CH1_V_CFG_03, VPIF_CH1_CTRL,
 252                 VPIF_CH1_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
 253                 VPIF_CH1_MAX_MODES,
 254         },
 255         /* Channel2 */
 256         {
 257                 VPIF_CH2_H_CFG, VPIF_CH2_V_CFG_00, VPIF_CH2_V_CFG_01,
 258                 VPIF_CH2_V_CFG_02, VPIF_CH2_V_CFG_03, VPIF_CH2_CTRL,
 259                 VPIF_CH2_IMG_ADD_OFST, VPIF_CH2_VANC0_STRT, VPIF_CH2_VANC0_SIZE,
 260                 VPIF_CH2_VANC1_STRT, VPIF_CH2_VANC1_SIZE, 0x7FF, 0x7FF,
 261                 VPIF_CH2_MAX_MODES
 262         },
 263         /* Channel3 */
 264         {
 265                 VPIF_CH3_H_CFG, VPIF_CH3_V_CFG_00, VPIF_CH3_V_CFG_01,
 266                 VPIF_CH3_V_CFG_02, VPIF_CH3_V_CFG_03, VPIF_CH3_CTRL,
 267                 VPIF_CH3_IMG_ADD_OFST, VPIF_CH3_VANC0_STRT, VPIF_CH3_VANC0_SIZE,
 268                 VPIF_CH3_VANC1_STRT, VPIF_CH3_VANC1_SIZE, 0x7FF, 0x7FF,
 269                 VPIF_CH3_MAX_MODES
 270         },
 271 };
 272
 273 /* vpif_set_mode_info:
 274  * This function is used to set horizontal and vertical config parameters
 275  * As per the standard in the channel, configure the values of L1, L3,
 276  * L5, L7  L9, L11 in VPIF Register , also write width and height
 277  */
 278 static void vpif_set_mode_info(const struct vpif_channel_config_params *config,
 279                                 u8 channel_id, u8 config_channel_id)
 280 {
 281         u32 value;
 282
 283         value = (config->eav2sav & vpifregs[config_channel_id].width_mask);
 284         value <<= VPIF_CH_LEN_SHIFT;
 285         value |= (config->sav2eav & vpifregs[config_channel_id].width_mask);
 286         regw(value, vpifregs[channel_id].h_cfg);
 287
 288         value = (config->l1 & vpifregs[config_channel_id].len_mask);
 289         value <<= VPIF_CH_LEN_SHIFT;
 290         value |= (config->l3 & vpifregs[config_channel_id].len_mask);
 291         regw(value, vpifregs[channel_id].v_cfg_00);
 292
 293         value = (config->l5 & vpifregs[config_channel_id].len_mask);
 294         value <<= VPIF_CH_LEN_SHIFT;
 295         value |= (config->l7 & vpifregs[config_channel_id].len_mask);
 296         regw(value, vpifregs[channel_id].v_cfg_01);
 297
 298         value = (config->l9 & vpifregs[config_channel_id].len_mask);
 299         value <<= VPIF_CH_LEN_SHIFT;
 300         value |= (config->l11 & vpifregs[config_channel_id].len_mask);
 301         regw(value, vpifregs[channel_id].v_cfg_02);
 302
 303         value = (config->vsize & vpifregs[config_channel_id].len_mask);
 304         regw(value, vpifregs[channel_id].v_cfg);
 305 }
 306
 307 /* config_vpif_params
 308  * Function to set the parameters of a channel
 309  * Mainly modifies the channel ciontrol register
 310  * It sets frame format, yc mux mode
 311  */
 312 static void config_vpif_params(struct vpif_params *vpifparams,
 313                                 u8 channel_id, u8 found)
 314 {
 315         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 316         u32 value, ch_nip, reg;
 317         u8 start, end;
 318         int i;
 319
 320         start = channel_id;
 321         end = channel_id + found;
 322
 323         for (i = start; i < end; i++) {
 324                 reg = vpifregs[i].ch_ctrl;
 325                 if (channel_id < 2)
 326                         ch_nip = VPIF_CAPTURE_CH_NIP;
 327                 else
 328                         ch_nip = VPIF_DISPLAY_CH_NIP;
 329
 330                 vpif_wr_bit(reg, ch_nip, config->frm_fmt);
 331                 vpif_wr_bit(reg, VPIF_CH_YC_MUX_BIT, config->ycmux_mode);
 332                 vpif_wr_bit(reg, VPIF_CH_INPUT_FIELD_FRAME_BIT,
 333                                         vpifparams->video_params.storage_mode);
 334
 335                 /* Set raster scanning SDR Format */
 336                 vpif_clr_bit(reg, VPIF_CH_SDR_FMT_BIT);
 337                 vpif_wr_bit(reg, VPIF_CH_DATA_MODE_BIT, config->capture_format);
 338
 339                 if (channel_id > 1)     /* Set the Pixel enable bit */
 340                         vpif_set_bit(reg, VPIF_DISPLAY_PIX_EN_BIT);
 341                 else if (config->capture_format) {
 342                         /* Set the polarity of various pins */
 343                         vpif_wr_bit(reg, VPIF_CH_FID_POLARITY_BIT,
 344                                         vpifparams->iface.fid_pol);
 345                         vpif_wr_bit(reg, VPIF_CH_V_VALID_POLARITY_BIT,
 346                                         vpifparams->iface.vd_pol);
 347                         vpif_wr_bit(reg, VPIF_CH_H_VALID_POLARITY_BIT,
 348                                         vpifparams->iface.hd_pol);
 349
 350                         value = regr(reg);
 351                         /* Set data width */
 352                         value &= ~(0x3u <<
 353                                         VPIF_CH_DATA_WIDTH_BIT);
 354                         value |= ((vpifparams->params.data_sz) <<
 355                                                      VPIF_CH_DATA_WIDTH_BIT);
 356                         regw(value, reg);
 357                 }
 358
 359                 /* Write the pitch in the driver */
 360                 regw((vpifparams->video_params.hpitch),
 361                                                 vpifregs[i].line_offset);
 362         }
 363 }
 364
 365 /* vpif_set_video_params
 366  * This function is used to set video parameters in VPIF register
 367  */
 368 int vpif_set_video_params(struct vpif_params *vpifparams, u8 channel_id)
 369 {
 370         const struct vpif_channel_config_params *config = &vpifparams->std_info;
 371         int found = 1;
 372
 373         vpif_set_mode_info(config, channel_id, channel_id);
 374         if (!config->ycmux_mode) {
 375                 /* YC are on separate channels (HDTV formats) */
 376                 vpif_set_mode_info(config, channel_id + 1, channel_id);
 377                 found = 2;
 378         }
 379
 380         config_vpif_params(vpifparams, channel_id, found);
 381
 382         regw(0x80, VPIF_REQ_SIZE);
 383         regw(0x01, VPIF_EMULATION_CTRL);
 384
 385         return found;
 386 }
 387 EXPORT_SYMBOL(vpif_set_video_params);
 388
 389 void vpif_set_vbi_display_params(struct vpif_vbi_params *vbiparams,
 390                                 u8 channel_id)
 391 {
 392         u32 value;
 393
 394         value = 0x3F8 & (vbiparams->hstart0);
 395         value |= 0x3FFFFFF & ((vbiparams->vstart0) << 16);
 396         regw(value, vpifregs[channel_id].vanc0_strt);
 397
 398         value = 0x3F8 & (vbiparams->hstart1);
 399         value |= 0x3FFFFFF & ((vbiparams->vstart1) << 16);
 400         regw(value, vpifregs[channel_id].vanc1_strt);
 401
 402         value = 0x3F8 & (vbiparams->hsize0);
 403         value |= 0x3FFFFFF & ((vbiparams->vsize0) << 16);
 404         regw(value, vpifregs[channel_id].vanc0_size);
 405
 406         value = 0x3F8 & (vbiparams->hsize1);
 407         value |= 0x3FFFFFF & ((vbiparams->vsize1) << 16);
 408         regw(value, vpifregs[channel_id].vanc1_size);
 409
 410 }
 411 EXPORT_SYMBOL(vpif_set_vbi_display_params);
 412
 413 int vpif_channel_getfid(u8 channel_id)
 414 {
 415         return (regr(vpifregs[channel_id].ch_ctrl) & VPIF_CH_FID_MASK)
 416                                         >> VPIF_CH_FID_SHIFT;
 417 }
 418 EXPORT_SYMBOL(vpif_channel_getfid);
 419
 420 static int __init vpif_probe(struct platform_device *pdev)
 421 {
 422         int status = 0;
 423
 424         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 425         if (!res)
 426                 return -ENOENT;
 427
 428         res_len = resource_size(res);
 429
 430         res = request_mem_region(res->start, res_len, res->name);
 431         if (!res)
 432                 return -EBUSY;
 433
 434         vpif_base = ioremap(res->start, res_len);
 435         if (!vpif_base) {
 436                 status = -EBUSY;
 437                 goto fail;
 438         }
 439
 440         vpif_clk = clk_get(&pdev->dev, "vpif");
 441         if (IS_ERR(vpif_clk)) {
 442                 status = PTR_ERR(vpif_clk);
 443                 goto clk_fail;
 444         }
 445         clk_enable(vpif_clk);
 446
 447         spin_lock_init(&vpif_lock);
 448         dev_info(&pdev->dev, "vpif probe success\n");
 449         return 0;
 450
 451 clk_fail:
 452         iounmap(vpif_base);
 453 fail:
 454         release_mem_region(res->start, res_len);
 455         return status;
 456 }
 457
 458 static int __devexit vpif_remove(struct platform_device *pdev)
 459 {
 460         if (vpif_clk) {
 461                 clk_disable(vpif_clk);
 462                 clk_put(vpif_clk);
 463         }
 464
 465         iounmap(vpif_base);
 466         release_mem_region(res->start, res_len);
 467         return 0;
 468 }
 469
 470 #ifdef CONFIG_PM
 471 static int vpif_suspend(struct device *dev)
 472 {
 473         clk_disable(vpif_clk);
 474         return 0;
 475 }
 476
 477 static int vpif_resume(struct device *dev)
 478 {
 479         clk_enable(vpif_clk);
 480         return 0;
 481 }
 482
 483 static const struct dev_pm_ops vpif_pm = {
 484         .suspend        = vpif_suspend,
 485         .resume         = vpif_resume,
 486 };
 487
 488 #define vpif_pm_ops (&vpif_pm)
 489 #else
 490 #define vpif_pm_ops NULL
 491 #endif
 492
 493 static struct platform_driver vpif_driver = {
 494         .driver = {
 495                 .name   = "vpif",
 496                 .owner = THIS_MODULE,
 497                 .pm     = vpif_pm_ops,
 498         },
 499         .remove = __devexit_p(vpif_remove),
 500         .probe = vpif_probe,
 501 };
 502
 503 static void vpif_exit(void)
 504 {
 505         platform_driver_unregister(&vpif_driver);
 506 }
 507
 508 static int __init vpif_init(void)
 509 {
 510         return platform_driver_register(&vpif_driver);
 511 }
 512 subsys_initcall(vpif_init);
 513 module_exit(vpif_exit);
 514