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

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