drivers/video/fbdev/omap2/omapfb/dss/rfbi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/video/omap2/dss/rfbi.c
   4  *
   5  * Copyright (C) 2009 Nokia Corporation
   6  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   7  *
   8  * Some code and ideas taken from drivers/video/omap/ driver
   9  * by Imre Deak.
  10  */
  11
  12 #define DSS_SUBSYS_NAME "RFBI"
  13
  14 #include <linux/kernel.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/export.h>
  17 #include <linux/vmalloc.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <linux/delay.h>
  21 #include <linux/kfifo.h>
  22 #include <linux/ktime.h>
  23 #include <linux/hrtimer.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/semaphore.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/component.h>
  29
  30 #include <video/omapfb_dss.h>
  31 #include "dss.h"
  32
  33 struct rfbi_reg { u16 idx; };
  34
  35 #define RFBI_REG(idx)           ((const struct rfbi_reg) { idx })
  36
  37 #define RFBI_REVISION           RFBI_REG(0x0000)
  38 #define RFBI_SYSCONFIG          RFBI_REG(0x0010)
  39 #define RFBI_SYSSTATUS          RFBI_REG(0x0014)
  40 #define RFBI_CONTROL            RFBI_REG(0x0040)
  41 #define RFBI_PIXEL_CNT          RFBI_REG(0x0044)
  42 #define RFBI_LINE_NUMBER        RFBI_REG(0x0048)
  43 #define RFBI_CMD                RFBI_REG(0x004c)
  44 #define RFBI_PARAM              RFBI_REG(0x0050)
  45 #define RFBI_DATA               RFBI_REG(0x0054)
  46 #define RFBI_READ               RFBI_REG(0x0058)
  47 #define RFBI_STATUS             RFBI_REG(0x005c)
  48
  49 #define RFBI_CONFIG(n)          RFBI_REG(0x0060 + (n)*0x18)
  50 #define RFBI_ONOFF_TIME(n)      RFBI_REG(0x0064 + (n)*0x18)
  51 #define RFBI_CYCLE_TIME(n)      RFBI_REG(0x0068 + (n)*0x18)
  52 #define RFBI_DATA_CYCLE1(n)     RFBI_REG(0x006c + (n)*0x18)
  53 #define RFBI_DATA_CYCLE2(n)     RFBI_REG(0x0070 + (n)*0x18)
  54 #define RFBI_DATA_CYCLE3(n)     RFBI_REG(0x0074 + (n)*0x18)
  55
  56 #define RFBI_VSYNC_WIDTH        RFBI_REG(0x0090)
  57 #define RFBI_HSYNC_WIDTH        RFBI_REG(0x0094)
  58
  59 #define REG_FLD_MOD(idx, val, start, end) \
  60         rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end))
  61
  62 enum omap_rfbi_cycleformat {
  63         OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0,
  64         OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1,
  65         OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2,
  66         OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3,
  67 };
  68
  69 enum omap_rfbi_datatype {
  70         OMAP_DSS_RFBI_DATATYPE_12 = 0,
  71         OMAP_DSS_RFBI_DATATYPE_16 = 1,
  72         OMAP_DSS_RFBI_DATATYPE_18 = 2,
  73         OMAP_DSS_RFBI_DATATYPE_24 = 3,
  74 };
  75
  76 enum omap_rfbi_parallelmode {
  77         OMAP_DSS_RFBI_PARALLELMODE_8 = 0,
  78         OMAP_DSS_RFBI_PARALLELMODE_9 = 1,
  79         OMAP_DSS_RFBI_PARALLELMODE_12 = 2,
  80         OMAP_DSS_RFBI_PARALLELMODE_16 = 3,
  81 };
  82
  83 static int rfbi_convert_timings(struct rfbi_timings *t);
  84 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
  85
  86 static struct {
  87         struct platform_device *pdev;
  88         void __iomem    *base;
  89
  90         unsigned long   l4_khz;
  91
  92         enum omap_rfbi_datatype datatype;
  93         enum omap_rfbi_parallelmode parallelmode;
  94
  95         enum omap_rfbi_te_mode te_mode;
  96         int te_enabled;
  97
  98         void (*framedone_callback)(void *data);
  99         void *framedone_callback_data;
 100
 101         struct omap_dss_device *dssdev[2];
 102
 103         struct semaphore bus_lock;
 104
 105         struct omap_video_timings timings;
 106         int pixel_size;
 107         int data_lines;
 108         struct rfbi_timings intf_timings;
 109
 110         struct omap_dss_device output;
 111 } rfbi;
 112
 113 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
 114 {
 115         __raw_writel(val, rfbi.base + idx.idx);
 116 }
 117
 118 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
 119 {
 120         return __raw_readl(rfbi.base + idx.idx);
 121 }
 122
 123 static int rfbi_runtime_get(void)
 124 {
 125         int r;
 126
 127         DSSDBG("rfbi_runtime_get\n");
 128
 129         r = pm_runtime_get_sync(&rfbi.pdev->dev);
 130         WARN_ON(r < 0);
 131         return r < 0 ? r : 0;
 132 }
 133
 134 static void rfbi_runtime_put(void)
 135 {
 136         int r;
 137
 138         DSSDBG("rfbi_runtime_put\n");
 139
 140         r = pm_runtime_put_sync(&rfbi.pdev->dev);
 141         WARN_ON(r < 0 && r != -ENOSYS);
 142 }
 143
 144 static void rfbi_bus_lock(void)
 145 {
 146         down(&rfbi.bus_lock);
 147 }
 148
 149 static void rfbi_bus_unlock(void)
 150 {
 151         up(&rfbi.bus_lock);
 152 }
 153
 154 static void rfbi_write_command(const void *buf, u32 len)
 155 {
 156         switch (rfbi.parallelmode) {
 157         case OMAP_DSS_RFBI_PARALLELMODE_8:
 158         {
 159                 const u8 *b = buf;
 160                 for (; len; len--)
 161                         rfbi_write_reg(RFBI_CMD, *b++);
 162                 break;
 163         }
 164
 165         case OMAP_DSS_RFBI_PARALLELMODE_16:
 166         {
 167                 const u16 *w = buf;
 168                 BUG_ON(len & 1);
 169                 for (; len; len -= 2)
 170                         rfbi_write_reg(RFBI_CMD, *w++);
 171                 break;
 172         }
 173
 174         case OMAP_DSS_RFBI_PARALLELMODE_9:
 175         case OMAP_DSS_RFBI_PARALLELMODE_12:
 176         default:
 177                 BUG();
 178         }
 179 }
 180
 181 static void rfbi_read_data(void *buf, u32 len)
 182 {
 183         switch (rfbi.parallelmode) {
 184         case OMAP_DSS_RFBI_PARALLELMODE_8:
 185         {
 186                 u8 *b = buf;
 187                 for (; len; len--) {
 188                         rfbi_write_reg(RFBI_READ, 0);
 189                         *b++ = rfbi_read_reg(RFBI_READ);
 190                 }
 191                 break;
 192         }
 193
 194         case OMAP_DSS_RFBI_PARALLELMODE_16:
 195         {
 196                 u16 *w = buf;
 197                 BUG_ON(len & ~1);
 198                 for (; len; len -= 2) {
 199                         rfbi_write_reg(RFBI_READ, 0);
 200                         *w++ = rfbi_read_reg(RFBI_READ);
 201                 }
 202                 break;
 203         }
 204
 205         case OMAP_DSS_RFBI_PARALLELMODE_9:
 206         case OMAP_DSS_RFBI_PARALLELMODE_12:
 207         default:
 208                 BUG();
 209         }
 210 }
 211
 212 static void rfbi_write_data(const void *buf, u32 len)
 213 {
 214         switch (rfbi.parallelmode) {
 215         case OMAP_DSS_RFBI_PARALLELMODE_8:
 216         {
 217                 const u8 *b = buf;
 218                 for (; len; len--)
 219                         rfbi_write_reg(RFBI_PARAM, *b++);
 220                 break;
 221         }
 222
 223         case OMAP_DSS_RFBI_PARALLELMODE_16:
 224         {
 225                 const u16 *w = buf;
 226                 BUG_ON(len & 1);
 227                 for (; len; len -= 2)
 228                         rfbi_write_reg(RFBI_PARAM, *w++);
 229                 break;
 230         }
 231
 232         case OMAP_DSS_RFBI_PARALLELMODE_9:
 233         case OMAP_DSS_RFBI_PARALLELMODE_12:
 234         default:
 235                 BUG();
 236
 237         }
 238 }
 239
 240 static void rfbi_write_pixels(const void __iomem *buf, int scr_width,
 241                 u16 x, u16 y,
 242                 u16 w, u16 h)
 243 {
 244         int start_offset = scr_width * y + x;
 245         int horiz_offset = scr_width - w;
 246         int i;
 247
 248         if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 249            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 250                 const u16 __iomem *pd = buf;
 251                 pd += start_offset;
 252
 253                 for (; h; --h) {
 254                         for (i = 0; i < w; ++i) {
 255                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 256                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 257                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 258                                 ++pd;
 259                         }
 260                         pd += horiz_offset;
 261                 }
 262         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
 263            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 264                 const u32 __iomem *pd = buf;
 265                 pd += start_offset;
 266
 267                 for (; h; --h) {
 268                         for (i = 0; i < w; ++i) {
 269                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 270                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
 271                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 272                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 273                                 ++pd;
 274                         }
 275                         pd += horiz_offset;
 276                 }
 277         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 278            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
 279                 const u16 __iomem *pd = buf;
 280                 pd += start_offset;
 281
 282                 for (; h; --h) {
 283                         for (i = 0; i < w; ++i) {
 284                                 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
 285                                 ++pd;
 286                         }
 287                         pd += horiz_offset;
 288                 }
 289         } else {
 290                 BUG();
 291         }
 292 }
 293
 294 static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 295                 void (*callback)(void *data), void *data)
 296 {
 297         u32 l;
 298         int r;
 299         struct omap_overlay_manager *mgr = rfbi.output.manager;
 300         u16 width = rfbi.timings.x_res;
 301         u16 height = rfbi.timings.y_res;
 302
 303         /*BUG_ON(callback == 0);*/
 304         BUG_ON(rfbi.framedone_callback != NULL);
 305
 306         DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 307
 308         dss_mgr_set_timings(mgr, &rfbi.timings);
 309
 310         r = dss_mgr_enable(mgr);
 311         if (r)
 312                 return r;
 313
 314         rfbi.framedone_callback = callback;
 315         rfbi.framedone_callback_data = data;
 316
 317         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 318
 319         l = rfbi_read_reg(RFBI_CONTROL);
 320         l = FLD_MOD(l, 1, 0, 0); /* enable */
 321         if (!rfbi.te_enabled)
 322                 l = FLD_MOD(l, 1, 4, 4); /* ITE */
 323
 324         rfbi_write_reg(RFBI_CONTROL, l);
 325
 326         return 0;
 327 }
 328
 329 static void framedone_callback(void *data)
 330 {
 331         void (*callback)(void *data);
 332
 333         DSSDBG("FRAMEDONE\n");
 334
 335         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 336
 337         callback = rfbi.framedone_callback;
 338         rfbi.framedone_callback = NULL;
 339
 340         if (callback != NULL)
 341                 callback(rfbi.framedone_callback_data);
 342 }
 343
 344 #if 1 /* VERBOSE */
 345 static void rfbi_print_timings(void)
 346 {
 347         u32 l;
 348         u32 time;
 349
 350         l = rfbi_read_reg(RFBI_CONFIG(0));
 351         time = 1000000000 / rfbi.l4_khz;
 352         if (l & (1 << 4))
 353                 time *= 2;
 354
 355         DSSDBG("Tick time %u ps\n", time);
 356         l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
 357         DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
 358                 "REONTIME %d, REOFFTIME %d\n",
 359                 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
 360                 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
 361
 362         l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
 363         DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
 364                 "ACCESSTIME %d\n",
 365                 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
 366                 (l >> 22) & 0x3f);
 367 }
 368 #else
 369 static void rfbi_print_timings(void) {}
 370 #endif
 371
 372
 373
 374
 375 static u32 extif_clk_period;
 376
 377 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
 378 {
 379         int bus_tick = extif_clk_period * div;
 380         return (ps + bus_tick - 1) / bus_tick * bus_tick;
 381 }
 382
 383 static int calc_reg_timing(struct rfbi_timings *t, int div)
 384 {
 385         t->clk_div = div;
 386
 387         t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
 388
 389         t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
 390         t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
 391         t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
 392
 393         t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
 394         t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
 395         t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
 396
 397         t->access_time = round_to_extif_ticks(t->access_time, div);
 398         t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
 399         t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
 400
 401         DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
 402                t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
 403         DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
 404                t->we_on_time, t->we_off_time, t->re_cycle_time,
 405                t->we_cycle_time);
 406         DSSDBG("[reg]rdaccess %d cspulse %d\n",
 407                t->access_time, t->cs_pulse_width);
 408
 409         return rfbi_convert_timings(t);
 410 }
 411
 412 static int calc_extif_timings(struct rfbi_timings *t)
 413 {
 414         u32 max_clk_div;
 415         int div;
 416
 417         rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
 418         for (div = 1; div <= max_clk_div; div++) {
 419                 if (calc_reg_timing(t, div) == 0)
 420                         break;
 421         }
 422
 423         if (div <= max_clk_div)
 424                 return 0;
 425
 426         DSSERR("can't setup timings\n");
 427         return -1;
 428 }
 429
 430
 431 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 432 {
 433         int r;
 434
 435         if (!t->converted) {
 436                 r = calc_extif_timings(t);
 437                 if (r < 0)
 438                         DSSERR("Failed to calc timings\n");
 439         }
 440
 441         BUG_ON(!t->converted);
 442
 443         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
 444         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 445
 446         /* TIMEGRANULARITY */
 447         REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
 448                     (t->tim[2] ? 1 : 0), 4, 4);
 449
 450         rfbi_print_timings();
 451 }
 452
 453 static int ps_to_rfbi_ticks(int time, int div)
 454 {
 455         unsigned long tick_ps;
 456         int ret;
 457
 458         /* Calculate in picosecs to yield more exact results */
 459         tick_ps = 1000000000 / (rfbi.l4_khz) * div;
 460
 461         ret = (time + tick_ps - 1) / tick_ps;
 462
 463         return ret;
 464 }
 465
 466 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
 467 {
 468         *clk_period = 1000000000 / rfbi.l4_khz;
 469         *max_clk_div = 2;
 470 }
 471
 472 static int rfbi_convert_timings(struct rfbi_timings *t)
 473 {
 474         u32 l;
 475         int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
 476         int actim, recyc, wecyc;
 477         int div = t->clk_div;
 478
 479         if (div <= 0 || div > 2)
 480                 return -1;
 481
 482         /* Make sure that after conversion it still holds that:
 483          * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
 484          * csoff > cson, csoff >= max(weoff, reoff), actim > reon
 485          */
 486         weon = ps_to_rfbi_ticks(t->we_on_time, div);
 487         weoff = ps_to_rfbi_ticks(t->we_off_time, div);
 488         if (weoff <= weon)
 489                 weoff = weon + 1;
 490         if (weon > 0x0f)
 491                 return -1;
 492         if (weoff > 0x3f)
 493                 return -1;
 494
 495         reon = ps_to_rfbi_ticks(t->re_on_time, div);
 496         reoff = ps_to_rfbi_ticks(t->re_off_time, div);
 497         if (reoff <= reon)
 498                 reoff = reon + 1;
 499         if (reon > 0x0f)
 500                 return -1;
 501         if (reoff > 0x3f)
 502                 return -1;
 503
 504         cson = ps_to_rfbi_ticks(t->cs_on_time, div);
 505         csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
 506         if (csoff <= cson)
 507                 csoff = cson + 1;
 508         if (csoff < max(weoff, reoff))
 509                 csoff = max(weoff, reoff);
 510         if (cson > 0x0f)
 511                 return -1;
 512         if (csoff > 0x3f)
 513                 return -1;
 514
 515         l =  cson;
 516         l |= csoff << 4;
 517         l |= weon  << 10;
 518         l |= weoff << 14;
 519         l |= reon  << 20;
 520         l |= reoff << 24;
 521
 522         t->tim[0] = l;
 523
 524         actim = ps_to_rfbi_ticks(t->access_time, div);
 525         if (actim <= reon)
 526                 actim = reon + 1;
 527         if (actim > 0x3f)
 528                 return -1;
 529
 530         wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
 531         if (wecyc < weoff)
 532                 wecyc = weoff;
 533         if (wecyc > 0x3f)
 534                 return -1;
 535
 536         recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
 537         if (recyc < reoff)
 538                 recyc = reoff;
 539         if (recyc > 0x3f)
 540                 return -1;
 541
 542         cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
 543         if (cs_pulse > 0x3f)
 544                 return -1;
 545
 546         l =  wecyc;
 547         l |= recyc    << 6;
 548         l |= cs_pulse << 12;
 549         l |= actim    << 22;
 550
 551         t->tim[1] = l;
 552
 553         t->tim[2] = div - 1;
 554
 555         t->converted = 1;
 556
 557         return 0;
 558 }
 559
 560 /* xxx FIX module selection missing */
 561 static int rfbi_setup_te(enum omap_rfbi_te_mode mode,
 562                              unsigned hs_pulse_time, unsigned vs_pulse_time,
 563                              int hs_pol_inv, int vs_pol_inv, int extif_div)
 564 {
 565         int hs, vs;
 566         int min;
 567         u32 l;
 568
 569         hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
 570         vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
 571         if (hs < 2)
 572                 return -EDOM;
 573         if (mode == OMAP_DSS_RFBI_TE_MODE_2)
 574                 min = 2;
 575         else /* OMAP_DSS_RFBI_TE_MODE_1 */
 576                 min = 4;
 577         if (vs < min)
 578                 return -EDOM;
 579         if (vs == hs)
 580                 return -EINVAL;
 581         rfbi.te_mode = mode;
 582         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
 583                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
 584
 585         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
 586         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 587
 588         l = rfbi_read_reg(RFBI_CONFIG(0));
 589         if (hs_pol_inv)
 590                 l &= ~(1 << 21);
 591         else
 592                 l |= 1 << 21;
 593         if (vs_pol_inv)
 594                 l &= ~(1 << 20);
 595         else
 596                 l |= 1 << 20;
 597
 598         return 0;
 599 }
 600
 601 /* xxx FIX module selection missing */
 602 static int rfbi_enable_te(bool enable, unsigned line)
 603 {
 604         u32 l;
 605
 606         DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 607         if (line > (1 << 11) - 1)
 608                 return -EINVAL;
 609
 610         l = rfbi_read_reg(RFBI_CONFIG(0));
 611         l &= ~(0x3 << 2);
 612         if (enable) {
 613                 rfbi.te_enabled = 1;
 614                 l |= rfbi.te_mode << 2;
 615         } else
 616                 rfbi.te_enabled = 0;
 617         rfbi_write_reg(RFBI_CONFIG(0), l);
 618         rfbi_write_reg(RFBI_LINE_NUMBER, line);
 619
 620         return 0;
 621 }
 622
 623 static int rfbi_configure_bus(int rfbi_module, int bpp, int lines)
 624 {
 625         u32 l;
 626         int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 627         enum omap_rfbi_cycleformat cycleformat;
 628         enum omap_rfbi_datatype datatype;
 629         enum omap_rfbi_parallelmode parallelmode;
 630
 631         switch (bpp) {
 632         case 12:
 633                 datatype = OMAP_DSS_RFBI_DATATYPE_12;
 634                 break;
 635         case 16:
 636                 datatype = OMAP_DSS_RFBI_DATATYPE_16;
 637                 break;
 638         case 18:
 639                 datatype = OMAP_DSS_RFBI_DATATYPE_18;
 640                 break;
 641         case 24:
 642                 datatype = OMAP_DSS_RFBI_DATATYPE_24;
 643                 break;
 644         default:
 645                 BUG();
 646                 return 1;
 647         }
 648         rfbi.datatype = datatype;
 649
 650         switch (lines) {
 651         case 8:
 652                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 653                 break;
 654         case 9:
 655                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 656                 break;
 657         case 12:
 658                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 659                 break;
 660         case 16:
 661                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 662                 break;
 663         default:
 664                 BUG();
 665                 return 1;
 666         }
 667         rfbi.parallelmode = parallelmode;
 668
 669         if ((bpp % lines) == 0) {
 670                 switch (bpp / lines) {
 671                 case 1:
 672                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 673                         break;
 674                 case 2:
 675                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 676                         break;
 677                 case 3:
 678                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 679                         break;
 680                 default:
 681                         BUG();
 682                         return 1;
 683                 }
 684         } else if ((2 * bpp % lines) == 0) {
 685                 if ((2 * bpp / lines) == 3)
 686                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 687                 else {
 688                         BUG();
 689                         return 1;
 690                 }
 691         } else {
 692                 BUG();
 693                 return 1;
 694         }
 695
 696         switch (cycleformat) {
 697         case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 698                 cycle1 = lines;
 699                 break;
 700
 701         case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 702                 cycle1 = lines;
 703                 cycle2 = lines;
 704                 break;
 705
 706         case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 707                 cycle1 = lines;
 708                 cycle2 = lines;
 709                 cycle3 = lines;
 710                 break;
 711
 712         case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 713                 cycle1 = lines;
 714                 cycle2 = (lines / 2) | ((lines / 2) << 16);
 715                 cycle3 = (lines << 16);
 716                 break;
 717         }
 718
 719         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 720
 721         l = 0;
 722         l |= FLD_VAL(parallelmode, 1, 0);
 723         l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 724         l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 725         l |= FLD_VAL(datatype, 6, 5);
 726         /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 727         l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 728         l |= FLD_VAL(cycleformat, 10, 9);
 729         l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 730         l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 731         l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 732         l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 733         l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 734         l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 735         l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 736         rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 737
 738         rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 739         rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 740         rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 741
 742
 743         l = rfbi_read_reg(RFBI_CONTROL);
 744         l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 745         l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 746         rfbi_write_reg(RFBI_CONTROL, l);
 747
 748
 749         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 750                bpp, lines, cycle1, cycle2, cycle3);
 751
 752         return 0;
 753 }
 754
 755 static int rfbi_configure(struct omap_dss_device *dssdev)
 756 {
 757         return rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 758                         rfbi.data_lines);
 759 }
 760
 761 static int rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
 762                 void *data)
 763 {
 764         return rfbi_transfer_area(dssdev, callback, data);
 765 }
 766
 767 static void rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
 768 {
 769         rfbi.timings.x_res = w;
 770         rfbi.timings.y_res = h;
 771 }
 772
 773 static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
 774 {
 775         rfbi.pixel_size = pixel_size;
 776 }
 777
 778 static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
 779 {
 780         rfbi.data_lines = data_lines;
 781 }
 782
 783 static void rfbi_set_interface_timings(struct omap_dss_device *dssdev,
 784                 struct rfbi_timings *timings)
 785 {
 786         rfbi.intf_timings = *timings;
 787 }
 788
 789 static void rfbi_dump_regs(struct seq_file *s)
 790 {
 791 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 792
 793         if (rfbi_runtime_get())
 794                 return;
 795
 796         DUMPREG(RFBI_REVISION);
 797         DUMPREG(RFBI_SYSCONFIG);
 798         DUMPREG(RFBI_SYSSTATUS);
 799         DUMPREG(RFBI_CONTROL);
 800         DUMPREG(RFBI_PIXEL_CNT);
 801         DUMPREG(RFBI_LINE_NUMBER);
 802         DUMPREG(RFBI_CMD);
 803         DUMPREG(RFBI_PARAM);
 804         DUMPREG(RFBI_DATA);
 805         DUMPREG(RFBI_READ);
 806         DUMPREG(RFBI_STATUS);
 807
 808         DUMPREG(RFBI_CONFIG(0));
 809         DUMPREG(RFBI_ONOFF_TIME(0));
 810         DUMPREG(RFBI_CYCLE_TIME(0));
 811         DUMPREG(RFBI_DATA_CYCLE1(0));
 812         DUMPREG(RFBI_DATA_CYCLE2(0));
 813         DUMPREG(RFBI_DATA_CYCLE3(0));
 814
 815         DUMPREG(RFBI_CONFIG(1));
 816         DUMPREG(RFBI_ONOFF_TIME(1));
 817         DUMPREG(RFBI_CYCLE_TIME(1));
 818         DUMPREG(RFBI_DATA_CYCLE1(1));
 819         DUMPREG(RFBI_DATA_CYCLE2(1));
 820         DUMPREG(RFBI_DATA_CYCLE3(1));
 821
 822         DUMPREG(RFBI_VSYNC_WIDTH);
 823         DUMPREG(RFBI_HSYNC_WIDTH);
 824
 825         rfbi_runtime_put();
 826 #undef DUMPREG
 827 }
 828
 829 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 830 {
 831         struct omap_overlay_manager *mgr = rfbi.output.manager;
 832         struct dss_lcd_mgr_config mgr_config;
 833
 834         mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
 835
 836         mgr_config.stallmode = true;
 837         /* Do we need fifohandcheck for RFBI? */
 838         mgr_config.fifohandcheck = false;
 839
 840         mgr_config.video_port_width = rfbi.pixel_size;
 841         mgr_config.lcden_sig_polarity = 0;
 842
 843         dss_mgr_set_lcd_config(mgr, &mgr_config);
 844
 845         /*
 846          * Set rfbi.timings with default values, the x_res and y_res fields
 847          * are expected to be already configured by the panel driver via
 848          * omapdss_rfbi_set_size()
 849          */
 850         rfbi.timings.hsw = 1;
 851         rfbi.timings.hfp = 1;
 852         rfbi.timings.hbp = 1;
 853         rfbi.timings.vsw = 1;
 854         rfbi.timings.vfp = 0;
 855         rfbi.timings.vbp = 0;
 856
 857         rfbi.timings.interlace = false;
 858         rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 859         rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 860         rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 861         rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
 862         rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
 863
 864         dss_mgr_set_timings(mgr, &rfbi.timings);
 865 }
 866
 867 static int rfbi_display_enable(struct omap_dss_device *dssdev)
 868 {
 869         struct omap_dss_device *out = &rfbi.output;
 870         int r;
 871
 872         if (out->manager == NULL) {
 873                 DSSERR("failed to enable display: no output/manager\n");
 874                 return -ENODEV;
 875         }
 876
 877         r = rfbi_runtime_get();
 878         if (r)
 879                 return r;
 880
 881         r = dss_mgr_register_framedone_handler(out->manager,
 882                         framedone_callback, NULL);
 883         if (r) {
 884                 DSSERR("can't get FRAMEDONE irq\n");
 885                 goto err1;
 886         }
 887
 888         rfbi_config_lcd_manager(dssdev);
 889
 890         rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 891                         rfbi.data_lines);
 892
 893         rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings);
 894
 895         return 0;
 896 err1:
 897         rfbi_runtime_put();
 898         return r;
 899 }
 900
 901 static void rfbi_display_disable(struct omap_dss_device *dssdev)
 902 {
 903         struct omap_dss_device *out = &rfbi.output;
 904
 905         dss_mgr_unregister_framedone_handler(out->manager,
 906                         framedone_callback, NULL);
 907
 908         rfbi_runtime_put();
 909 }
 910
 911 static int rfbi_init_display(struct omap_dss_device *dssdev)
 912 {
 913         rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 914         return 0;
 915 }
 916
 917 static void rfbi_init_output(struct platform_device *pdev)
 918 {
 919         struct omap_dss_device *out = &rfbi.output;
 920
 921         out->dev = &pdev->dev;
 922         out->id = OMAP_DSS_OUTPUT_DBI;
 923         out->output_type = OMAP_DISPLAY_TYPE_DBI;
 924         out->name = "rfbi.0";
 925         out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 926         out->owner = THIS_MODULE;
 927
 928         omapdss_register_output(out);
 929 }
 930
 931 static void rfbi_uninit_output(struct platform_device *pdev)
 932 {
 933         struct omap_dss_device *out = &rfbi.output;
 934
 935         omapdss_unregister_output(out);
 936 }
 937
 938 /* RFBI HW IP initialisation */
 939 static int rfbi_bind(struct device *dev, struct device *master, void *data)
 940 {
 941         struct platform_device *pdev = to_platform_device(dev);
 942         u32 rev;
 943         struct resource *rfbi_mem;
 944         struct clk *clk;
 945         int r;
 946
 947         rfbi.pdev = pdev;
 948
 949         sema_init(&rfbi.bus_lock, 1);
 950
 951         rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
 952         if (!rfbi_mem) {
 953                 DSSERR("can't get IORESOURCE_MEM RFBI\n");
 954                 return -EINVAL;
 955         }
 956
 957         rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
 958                                  resource_size(rfbi_mem));
 959         if (!rfbi.base) {
 960                 DSSERR("can't ioremap RFBI\n");
 961                 return -ENOMEM;
 962         }
 963
 964         clk = clk_get(&pdev->dev, "ick");
 965         if (IS_ERR(clk)) {
 966                 DSSERR("can't get ick\n");
 967                 return PTR_ERR(clk);
 968         }
 969
 970         rfbi.l4_khz = clk_get_rate(clk) / 1000;
 971
 972         clk_put(clk);
 973
 974         pm_runtime_enable(&pdev->dev);
 975
 976         r = rfbi_runtime_get();
 977         if (r)
 978                 goto err_runtime_get;
 979
 980         msleep(10);
 981
 982         rev = rfbi_read_reg(RFBI_REVISION);
 983         dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
 984                FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
 985
 986         rfbi_runtime_put();
 987
 988         dss_debugfs_create_file("rfbi", rfbi_dump_regs);
 989
 990         rfbi_init_output(pdev);
 991
 992         return 0;
 993
 994 err_runtime_get:
 995         pm_runtime_disable(&pdev->dev);
 996         return r;
 997 }
 998
 999 static void rfbi_unbind(struct device *dev, struct device *master, void *data)
1000 {
1001         struct platform_device *pdev = to_platform_device(dev);
1002
1003         rfbi_uninit_output(pdev);
1004
1005         pm_runtime_disable(&pdev->dev);
1006
1007         return 0;
1008 }
1009
1010 static const struct component_ops rfbi_component_ops = {
1011         .bind   = rfbi_bind,
1012         .unbind = rfbi_unbind,
1013 };
1014
1015 static int rfbi_probe(struct platform_device *pdev)
1016 {
1017         return component_add(&pdev->dev, &rfbi_component_ops);
1018 }
1019
1020 static int rfbi_remove(struct platform_device *pdev)
1021 {
1022         component_del(&pdev->dev, &rfbi_component_ops);
1023         return 0;
1024 }
1025
1026 static int rfbi_runtime_suspend(struct device *dev)
1027 {
1028         dispc_runtime_put();
1029
1030         return 0;
1031 }
1032
1033 static int rfbi_runtime_resume(struct device *dev)
1034 {
1035         int r;
1036
1037         r = dispc_runtime_get();
1038         if (r < 0)
1039                 return r;
1040
1041         return 0;
1042 }
1043
1044 static const struct dev_pm_ops rfbi_pm_ops = {
1045         .runtime_suspend = rfbi_runtime_suspend,
1046         .runtime_resume = rfbi_runtime_resume,
1047 };
1048
1049 static struct platform_driver omap_rfbihw_driver = {
1050         .probe          = rfbi_probe,
1051         .remove         = rfbi_remove,
1052         .driver         = {
1053                 .name   = "omapdss_rfbi",
1054                 .pm     = &rfbi_pm_ops,
1055                 .suppress_bind_attrs = true,
1056         },
1057 };
1058
1059 int __init rfbi_init_platform_driver(void)
1060 {
1061         return platform_driver_register(&omap_rfbihw_driver);
1062 }
1063
1064 void rfbi_uninit_platform_driver(void)
1065 {
1066         platform_driver_unregister(&omap_rfbihw_driver);
1067 }