Pileus Git - ~andy/linux/blob - drivers/video/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 } rfbi;
 120
 121 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
 122 {
 123         __raw_writel(val, rfbi.base + idx.idx);
 124 }
 125
 126 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
 127 {
 128         return __raw_readl(rfbi.base + idx.idx);
 129 }
 130
 131 static int rfbi_runtime_get(void)
 132 {
 133         int r;
 134
 135         DSSDBG("rfbi_runtime_get\n");
 136
 137         r = pm_runtime_get_sync(&rfbi.pdev->dev);
 138         WARN_ON(r < 0);
 139         return r < 0 ? r : 0;
 140 }
 141
 142 static void rfbi_runtime_put(void)
 143 {
 144         int r;
 145
 146         DSSDBG("rfbi_runtime_put\n");
 147
 148         r = pm_runtime_put_sync(&rfbi.pdev->dev);
 149         WARN_ON(r < 0 && r != -ENOSYS);
 150 }
 151
 152 void rfbi_bus_lock(void)
 153 {
 154         down(&rfbi.bus_lock);
 155 }
 156 EXPORT_SYMBOL(rfbi_bus_lock);
 157
 158 void rfbi_bus_unlock(void)
 159 {
 160         up(&rfbi.bus_lock);
 161 }
 162 EXPORT_SYMBOL(rfbi_bus_unlock);
 163
 164 void omap_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 EXPORT_SYMBOL(omap_rfbi_write_command);
 191
 192 void omap_rfbi_read_data(void *buf, u32 len)
 193 {
 194         switch (rfbi.parallelmode) {
 195         case OMAP_DSS_RFBI_PARALLELMODE_8:
 196         {
 197                 u8 *b = buf;
 198                 for (; len; len--) {
 199                         rfbi_write_reg(RFBI_READ, 0);
 200                         *b++ = rfbi_read_reg(RFBI_READ);
 201                 }
 202                 break;
 203         }
 204
 205         case OMAP_DSS_RFBI_PARALLELMODE_16:
 206         {
 207                 u16 *w = buf;
 208                 BUG_ON(len & ~1);
 209                 for (; len; len -= 2) {
 210                         rfbi_write_reg(RFBI_READ, 0);
 211                         *w++ = rfbi_read_reg(RFBI_READ);
 212                 }
 213                 break;
 214         }
 215
 216         case OMAP_DSS_RFBI_PARALLELMODE_9:
 217         case OMAP_DSS_RFBI_PARALLELMODE_12:
 218         default:
 219                 BUG();
 220         }
 221 }
 222 EXPORT_SYMBOL(omap_rfbi_read_data);
 223
 224 void omap_rfbi_write_data(const void *buf, u32 len)
 225 {
 226         switch (rfbi.parallelmode) {
 227         case OMAP_DSS_RFBI_PARALLELMODE_8:
 228         {
 229                 const u8 *b = buf;
 230                 for (; len; len--)
 231                         rfbi_write_reg(RFBI_PARAM, *b++);
 232                 break;
 233         }
 234
 235         case OMAP_DSS_RFBI_PARALLELMODE_16:
 236         {
 237                 const u16 *w = buf;
 238                 BUG_ON(len & 1);
 239                 for (; len; len -= 2)
 240                         rfbi_write_reg(RFBI_PARAM, *w++);
 241                 break;
 242         }
 243
 244         case OMAP_DSS_RFBI_PARALLELMODE_9:
 245         case OMAP_DSS_RFBI_PARALLELMODE_12:
 246         default:
 247                 BUG();
 248
 249         }
 250 }
 251 EXPORT_SYMBOL(omap_rfbi_write_data);
 252
 253 void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
 254                 u16 x, u16 y,
 255                 u16 w, u16 h)
 256 {
 257         int start_offset = scr_width * y + x;
 258         int horiz_offset = scr_width - w;
 259         int i;
 260
 261         if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 262            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 263                 const u16 __iomem *pd = buf;
 264                 pd += start_offset;
 265
 266                 for (; h; --h) {
 267                         for (i = 0; i < w; ++i) {
 268                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 269                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 270                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 271                                 ++pd;
 272                         }
 273                         pd += horiz_offset;
 274                 }
 275         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
 276            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 277                 const u32 __iomem *pd = buf;
 278                 pd += start_offset;
 279
 280                 for (; h; --h) {
 281                         for (i = 0; i < w; ++i) {
 282                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 283                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
 284                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 285                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 286                                 ++pd;
 287                         }
 288                         pd += horiz_offset;
 289                 }
 290         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 291            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
 292                 const u16 __iomem *pd = buf;
 293                 pd += start_offset;
 294
 295                 for (; h; --h) {
 296                         for (i = 0; i < w; ++i) {
 297                                 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
 298                                 ++pd;
 299                         }
 300                         pd += horiz_offset;
 301                 }
 302         } else {
 303                 BUG();
 304         }
 305 }
 306 EXPORT_SYMBOL(omap_rfbi_write_pixels);
 307
 308 static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 309                 void (*callback)(void *data), void *data)
 310 {
 311         u32 l;
 312         int r;
 313         u16 width = rfbi.timings.x_res;
 314         u16 height = rfbi.timings.y_res;
 315
 316         /*BUG_ON(callback == 0);*/
 317         BUG_ON(rfbi.framedone_callback != NULL);
 318
 319         DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 320
 321         dss_mgr_set_timings(dssdev->manager, &rfbi.timings);
 322
 323         r = dss_mgr_enable(dssdev->manager);
 324         if (r)
 325                 return r;
 326
 327         rfbi.framedone_callback = callback;
 328         rfbi.framedone_callback_data = data;
 329
 330         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 331
 332         l = rfbi_read_reg(RFBI_CONTROL);
 333         l = FLD_MOD(l, 1, 0, 0); /* enable */
 334         if (!rfbi.te_enabled)
 335                 l = FLD_MOD(l, 1, 4, 4); /* ITE */
 336
 337         rfbi_write_reg(RFBI_CONTROL, l);
 338
 339         return 0;
 340 }
 341
 342 static void framedone_callback(void *data, u32 mask)
 343 {
 344         void (*callback)(void *data);
 345
 346         DSSDBG("FRAMEDONE\n");
 347
 348         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 349
 350         callback = rfbi.framedone_callback;
 351         rfbi.framedone_callback = NULL;
 352
 353         if (callback != NULL)
 354                 callback(rfbi.framedone_callback_data);
 355 }
 356
 357 #if 1 /* VERBOSE */
 358 static void rfbi_print_timings(void)
 359 {
 360         u32 l;
 361         u32 time;
 362
 363         l = rfbi_read_reg(RFBI_CONFIG(0));
 364         time = 1000000000 / rfbi.l4_khz;
 365         if (l & (1 << 4))
 366                 time *= 2;
 367
 368         DSSDBG("Tick time %u ps\n", time);
 369         l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
 370         DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
 371                 "REONTIME %d, REOFFTIME %d\n",
 372                 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
 373                 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
 374
 375         l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
 376         DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
 377                 "ACCESSTIME %d\n",
 378                 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
 379                 (l >> 22) & 0x3f);
 380 }
 381 #else
 382 static void rfbi_print_timings(void) {}
 383 #endif
 384
 385
 386
 387
 388 static u32 extif_clk_period;
 389
 390 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
 391 {
 392         int bus_tick = extif_clk_period * div;
 393         return (ps + bus_tick - 1) / bus_tick * bus_tick;
 394 }
 395
 396 static int calc_reg_timing(struct rfbi_timings *t, int div)
 397 {
 398         t->clk_div = div;
 399
 400         t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
 401
 402         t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
 403         t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
 404         t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
 405
 406         t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
 407         t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
 408         t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
 409
 410         t->access_time = round_to_extif_ticks(t->access_time, div);
 411         t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
 412         t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
 413
 414         DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
 415                t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
 416         DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
 417                t->we_on_time, t->we_off_time, t->re_cycle_time,
 418                t->we_cycle_time);
 419         DSSDBG("[reg]rdaccess %d cspulse %d\n",
 420                t->access_time, t->cs_pulse_width);
 421
 422         return rfbi_convert_timings(t);
 423 }
 424
 425 static int calc_extif_timings(struct rfbi_timings *t)
 426 {
 427         u32 max_clk_div;
 428         int div;
 429
 430         rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
 431         for (div = 1; div <= max_clk_div; div++) {
 432                 if (calc_reg_timing(t, div) == 0)
 433                         break;
 434         }
 435
 436         if (div <= max_clk_div)
 437                 return 0;
 438
 439         DSSERR("can't setup timings\n");
 440         return -1;
 441 }
 442
 443
 444 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 445 {
 446         int r;
 447
 448         if (!t->converted) {
 449                 r = calc_extif_timings(t);
 450                 if (r < 0)
 451                         DSSERR("Failed to calc timings\n");
 452         }
 453
 454         BUG_ON(!t->converted);
 455
 456         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
 457         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 458
 459         /* TIMEGRANULARITY */
 460         REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
 461                     (t->tim[2] ? 1 : 0), 4, 4);
 462
 463         rfbi_print_timings();
 464 }
 465
 466 static int ps_to_rfbi_ticks(int time, int div)
 467 {
 468         unsigned long tick_ps;
 469         int ret;
 470
 471         /* Calculate in picosecs to yield more exact results */
 472         tick_ps = 1000000000 / (rfbi.l4_khz) * div;
 473
 474         ret = (time + tick_ps - 1) / tick_ps;
 475
 476         return ret;
 477 }
 478
 479 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
 480 {
 481         *clk_period = 1000000000 / rfbi.l4_khz;
 482         *max_clk_div = 2;
 483 }
 484
 485 static int rfbi_convert_timings(struct rfbi_timings *t)
 486 {
 487         u32 l;
 488         int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
 489         int actim, recyc, wecyc;
 490         int div = t->clk_div;
 491
 492         if (div <= 0 || div > 2)
 493                 return -1;
 494
 495         /* Make sure that after conversion it still holds that:
 496          * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
 497          * csoff > cson, csoff >= max(weoff, reoff), actim > reon
 498          */
 499         weon = ps_to_rfbi_ticks(t->we_on_time, div);
 500         weoff = ps_to_rfbi_ticks(t->we_off_time, div);
 501         if (weoff <= weon)
 502                 weoff = weon + 1;
 503         if (weon > 0x0f)
 504                 return -1;
 505         if (weoff > 0x3f)
 506                 return -1;
 507
 508         reon = ps_to_rfbi_ticks(t->re_on_time, div);
 509         reoff = ps_to_rfbi_ticks(t->re_off_time, div);
 510         if (reoff <= reon)
 511                 reoff = reon + 1;
 512         if (reon > 0x0f)
 513                 return -1;
 514         if (reoff > 0x3f)
 515                 return -1;
 516
 517         cson = ps_to_rfbi_ticks(t->cs_on_time, div);
 518         csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
 519         if (csoff <= cson)
 520                 csoff = cson + 1;
 521         if (csoff < max(weoff, reoff))
 522                 csoff = max(weoff, reoff);
 523         if (cson > 0x0f)
 524                 return -1;
 525         if (csoff > 0x3f)
 526                 return -1;
 527
 528         l =  cson;
 529         l |= csoff << 4;
 530         l |= weon  << 10;
 531         l |= weoff << 14;
 532         l |= reon  << 20;
 533         l |= reoff << 24;
 534
 535         t->tim[0] = l;
 536
 537         actim = ps_to_rfbi_ticks(t->access_time, div);
 538         if (actim <= reon)
 539                 actim = reon + 1;
 540         if (actim > 0x3f)
 541                 return -1;
 542
 543         wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
 544         if (wecyc < weoff)
 545                 wecyc = weoff;
 546         if (wecyc > 0x3f)
 547                 return -1;
 548
 549         recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
 550         if (recyc < reoff)
 551                 recyc = reoff;
 552         if (recyc > 0x3f)
 553                 return -1;
 554
 555         cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
 556         if (cs_pulse > 0x3f)
 557                 return -1;
 558
 559         l =  wecyc;
 560         l |= recyc    << 6;
 561         l |= cs_pulse << 12;
 562         l |= actim    << 22;
 563
 564         t->tim[1] = l;
 565
 566         t->tim[2] = div - 1;
 567
 568         t->converted = 1;
 569
 570         return 0;
 571 }
 572
 573 /* xxx FIX module selection missing */
 574 int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
 575                              unsigned hs_pulse_time, unsigned vs_pulse_time,
 576                              int hs_pol_inv, int vs_pol_inv, int extif_div)
 577 {
 578         int hs, vs;
 579         int min;
 580         u32 l;
 581
 582         hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
 583         vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
 584         if (hs < 2)
 585                 return -EDOM;
 586         if (mode == OMAP_DSS_RFBI_TE_MODE_2)
 587                 min = 2;
 588         else /* OMAP_DSS_RFBI_TE_MODE_1 */
 589                 min = 4;
 590         if (vs < min)
 591                 return -EDOM;
 592         if (vs == hs)
 593                 return -EINVAL;
 594         rfbi.te_mode = mode;
 595         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
 596                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
 597
 598         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
 599         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 600
 601         l = rfbi_read_reg(RFBI_CONFIG(0));
 602         if (hs_pol_inv)
 603                 l &= ~(1 << 21);
 604         else
 605                 l |= 1 << 21;
 606         if (vs_pol_inv)
 607                 l &= ~(1 << 20);
 608         else
 609                 l |= 1 << 20;
 610
 611         return 0;
 612 }
 613 EXPORT_SYMBOL(omap_rfbi_setup_te);
 614
 615 /* xxx FIX module selection missing */
 616 int omap_rfbi_enable_te(bool enable, unsigned line)
 617 {
 618         u32 l;
 619
 620         DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 621         if (line > (1 << 11) - 1)
 622                 return -EINVAL;
 623
 624         l = rfbi_read_reg(RFBI_CONFIG(0));
 625         l &= ~(0x3 << 2);
 626         if (enable) {
 627                 rfbi.te_enabled = 1;
 628                 l |= rfbi.te_mode << 2;
 629         } else
 630                 rfbi.te_enabled = 0;
 631         rfbi_write_reg(RFBI_CONFIG(0), l);
 632         rfbi_write_reg(RFBI_LINE_NUMBER, line);
 633
 634         return 0;
 635 }
 636 EXPORT_SYMBOL(omap_rfbi_enable_te);
 637
 638 static int rfbi_configure(int rfbi_module, int bpp, int lines)
 639 {
 640         u32 l;
 641         int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 642         enum omap_rfbi_cycleformat cycleformat;
 643         enum omap_rfbi_datatype datatype;
 644         enum omap_rfbi_parallelmode parallelmode;
 645
 646         switch (bpp) {
 647         case 12:
 648                 datatype = OMAP_DSS_RFBI_DATATYPE_12;
 649                 break;
 650         case 16:
 651                 datatype = OMAP_DSS_RFBI_DATATYPE_16;
 652                 break;
 653         case 18:
 654                 datatype = OMAP_DSS_RFBI_DATATYPE_18;
 655                 break;
 656         case 24:
 657                 datatype = OMAP_DSS_RFBI_DATATYPE_24;
 658                 break;
 659         default:
 660                 BUG();
 661                 return 1;
 662         }
 663         rfbi.datatype = datatype;
 664
 665         switch (lines) {
 666         case 8:
 667                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 668                 break;
 669         case 9:
 670                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 671                 break;
 672         case 12:
 673                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 674                 break;
 675         case 16:
 676                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 677                 break;
 678         default:
 679                 BUG();
 680                 return 1;
 681         }
 682         rfbi.parallelmode = parallelmode;
 683
 684         if ((bpp % lines) == 0) {
 685                 switch (bpp / lines) {
 686                 case 1:
 687                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 688                         break;
 689                 case 2:
 690                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 691                         break;
 692                 case 3:
 693                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 694                         break;
 695                 default:
 696                         BUG();
 697                         return 1;
 698                 }
 699         } else if ((2 * bpp % lines) == 0) {
 700                 if ((2 * bpp / lines) == 3)
 701                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 702                 else {
 703                         BUG();
 704                         return 1;
 705                 }
 706         } else {
 707                 BUG();
 708                 return 1;
 709         }
 710
 711         switch (cycleformat) {
 712         case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 713                 cycle1 = lines;
 714                 break;
 715
 716         case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 717                 cycle1 = lines;
 718                 cycle2 = lines;
 719                 break;
 720
 721         case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 722                 cycle1 = lines;
 723                 cycle2 = lines;
 724                 cycle3 = lines;
 725                 break;
 726
 727         case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 728                 cycle1 = lines;
 729                 cycle2 = (lines / 2) | ((lines / 2) << 16);
 730                 cycle3 = (lines << 16);
 731                 break;
 732         }
 733
 734         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 735
 736         l = 0;
 737         l |= FLD_VAL(parallelmode, 1, 0);
 738         l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 739         l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 740         l |= FLD_VAL(datatype, 6, 5);
 741         /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 742         l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 743         l |= FLD_VAL(cycleformat, 10, 9);
 744         l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 745         l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 746         l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 747         l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 748         l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 749         l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 750         l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 751         rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 752
 753         rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 754         rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 755         rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 756
 757
 758         l = rfbi_read_reg(RFBI_CONTROL);
 759         l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 760         l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 761         rfbi_write_reg(RFBI_CONTROL, l);
 762
 763
 764         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 765                bpp, lines, cycle1, cycle2, cycle3);
 766
 767         return 0;
 768 }
 769
 770 int omap_rfbi_configure(struct omap_dss_device *dssdev)
 771 {
 772         return rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 773                         rfbi.data_lines);
 774 }
 775 EXPORT_SYMBOL(omap_rfbi_configure);
 776
 777 int omap_rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
 778                 void *data)
 779 {
 780         return rfbi_transfer_area(dssdev, callback, data);
 781 }
 782 EXPORT_SYMBOL(omap_rfbi_update);
 783
 784 void omapdss_rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
 785 {
 786         rfbi.timings.x_res = w;
 787         rfbi.timings.y_res = h;
 788 }
 789 EXPORT_SYMBOL(omapdss_rfbi_set_size);
 790
 791 void omapdss_rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
 792 {
 793         rfbi.pixel_size = pixel_size;
 794 }
 795 EXPORT_SYMBOL(omapdss_rfbi_set_pixel_size);
 796
 797 void omapdss_rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
 798 {
 799         rfbi.data_lines = data_lines;
 800 }
 801 EXPORT_SYMBOL(omapdss_rfbi_set_data_lines);
 802
 803 void omapdss_rfbi_set_interface_timings(struct omap_dss_device *dssdev,
 804                 struct rfbi_timings *timings)
 805 {
 806         rfbi.intf_timings = *timings;
 807 }
 808 EXPORT_SYMBOL(omapdss_rfbi_set_interface_timings);
 809
 810 static void rfbi_dump_regs(struct seq_file *s)
 811 {
 812 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 813
 814         if (rfbi_runtime_get())
 815                 return;
 816
 817         DUMPREG(RFBI_REVISION);
 818         DUMPREG(RFBI_SYSCONFIG);
 819         DUMPREG(RFBI_SYSSTATUS);
 820         DUMPREG(RFBI_CONTROL);
 821         DUMPREG(RFBI_PIXEL_CNT);
 822         DUMPREG(RFBI_LINE_NUMBER);
 823         DUMPREG(RFBI_CMD);
 824         DUMPREG(RFBI_PARAM);
 825         DUMPREG(RFBI_DATA);
 826         DUMPREG(RFBI_READ);
 827         DUMPREG(RFBI_STATUS);
 828
 829         DUMPREG(RFBI_CONFIG(0));
 830         DUMPREG(RFBI_ONOFF_TIME(0));
 831         DUMPREG(RFBI_CYCLE_TIME(0));
 832         DUMPREG(RFBI_DATA_CYCLE1(0));
 833         DUMPREG(RFBI_DATA_CYCLE2(0));
 834         DUMPREG(RFBI_DATA_CYCLE3(0));
 835
 836         DUMPREG(RFBI_CONFIG(1));
 837         DUMPREG(RFBI_ONOFF_TIME(1));
 838         DUMPREG(RFBI_CYCLE_TIME(1));
 839         DUMPREG(RFBI_DATA_CYCLE1(1));
 840         DUMPREG(RFBI_DATA_CYCLE2(1));
 841         DUMPREG(RFBI_DATA_CYCLE3(1));
 842
 843         DUMPREG(RFBI_VSYNC_WIDTH);
 844         DUMPREG(RFBI_HSYNC_WIDTH);
 845
 846         rfbi_runtime_put();
 847 #undef DUMPREG
 848 }
 849
 850 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 851 {
 852         struct dss_lcd_mgr_config mgr_config;
 853
 854         mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
 855
 856         mgr_config.stallmode = true;
 857         /* Do we need fifohandcheck for RFBI? */
 858         mgr_config.fifohandcheck = false;
 859
 860         mgr_config.video_port_width = rfbi.pixel_size;
 861         mgr_config.lcden_sig_polarity = 0;
 862
 863         dss_mgr_set_lcd_config(dssdev->manager, &mgr_config);
 864
 865         /*
 866          * Set rfbi.timings with default values, the x_res and y_res fields
 867          * are expected to be already configured by the panel driver via
 868          * omapdss_rfbi_set_size()
 869          */
 870         rfbi.timings.hsw = 1;
 871         rfbi.timings.hfp = 1;
 872         rfbi.timings.hbp = 1;
 873         rfbi.timings.vsw = 1;
 874         rfbi.timings.vfp = 0;
 875         rfbi.timings.vbp = 0;
 876
 877         rfbi.timings.interlace = false;
 878         rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 879         rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 880         rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 881         rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
 882         rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
 883
 884         dss_mgr_set_timings(dssdev->manager, &rfbi.timings);
 885 }
 886
 887 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 888 {
 889         int r;
 890
 891         if (dssdev->manager == NULL) {
 892                 DSSERR("failed to enable display: no manager\n");
 893                 return -ENODEV;
 894         }
 895
 896         r = rfbi_runtime_get();
 897         if (r)
 898                 return r;
 899
 900         r = omap_dss_start_device(dssdev);
 901         if (r) {
 902                 DSSERR("failed to start device\n");
 903                 goto err0;
 904         }
 905
 906         r = omap_dispc_register_isr(framedone_callback, NULL,
 907                         DISPC_IRQ_FRAMEDONE);
 908         if (r) {
 909                 DSSERR("can't get FRAMEDONE irq\n");
 910                 goto err1;
 911         }
 912
 913         rfbi_config_lcd_manager(dssdev);
 914
 915         rfbi_configure(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 916                         rfbi.data_lines);
 917
 918         rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings);
 919
 920         return 0;
 921 err1:
 922         omap_dss_stop_device(dssdev);
 923 err0:
 924         rfbi_runtime_put();
 925         return r;
 926 }
 927 EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 928
 929 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 930 {
 931         omap_dispc_unregister_isr(framedone_callback, NULL,
 932                         DISPC_IRQ_FRAMEDONE);
 933         omap_dss_stop_device(dssdev);
 934
 935         rfbi_runtime_put();
 936 }
 937 EXPORT_SYMBOL(omapdss_rfbi_display_disable);
 938
 939 static int __init rfbi_init_display(struct omap_dss_device *dssdev)
 940 {
 941         rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 942         return 0;
 943 }
 944
 945 static struct omap_dss_device * __init rfbi_find_dssdev(struct platform_device *pdev)
 946 {
 947         struct omap_dss_board_info *pdata = pdev->dev.platform_data;
 948         const char *def_disp_name = dss_get_default_display_name();
 949         struct omap_dss_device *def_dssdev;
 950         int i;
 951
 952         def_dssdev = NULL;
 953
 954         for (i = 0; i < pdata->num_devices; ++i) {
 955                 struct omap_dss_device *dssdev = pdata->devices[i];
 956
 957                 if (dssdev->type != OMAP_DISPLAY_TYPE_DBI)
 958                         continue;
 959
 960                 if (def_dssdev == NULL)
 961                         def_dssdev = dssdev;
 962
 963                 if (def_disp_name != NULL &&
 964                                 strcmp(dssdev->name, def_disp_name) == 0) {
 965                         def_dssdev = dssdev;
 966                         break;
 967                 }
 968         }
 969
 970         return def_dssdev;
 971 }
 972
 973 static void __init rfbi_probe_pdata(struct platform_device *rfbidev)
 974 {
 975         struct omap_dss_device *plat_dssdev;
 976         struct omap_dss_device *dssdev;
 977         int r;
 978
 979         plat_dssdev = rfbi_find_dssdev(rfbidev);
 980
 981         if (!plat_dssdev)
 982                 return;
 983
 984         dssdev = dss_alloc_and_init_device(&rfbidev->dev);
 985         if (!dssdev)
 986                 return;
 987
 988         dss_copy_device_pdata(dssdev, plat_dssdev);
 989
 990         r = rfbi_init_display(dssdev);
 991         if (r) {
 992                 DSSERR("device %s init failed: %d\n", dssdev->name, r);
 993                 dss_put_device(dssdev);
 994                 return;
 995         }
 996
 997         r = dss_add_device(dssdev);
 998         if (r) {
 999                 DSSERR("device %s register failed: %d\n", dssdev->name, r);
1000                 dss_put_device(dssdev);
1001                 return;
1002         }
1003 }
1004
1005 /* RFBI HW IP initialisation */
1006 static int __init omap_rfbihw_probe(struct platform_device *pdev)
1007 {
1008         u32 rev;
1009         struct resource *rfbi_mem;
1010         struct clk *clk;
1011         int r;
1012
1013         rfbi.pdev = pdev;
1014
1015         sema_init(&rfbi.bus_lock, 1);
1016
1017         rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
1018         if (!rfbi_mem) {
1019                 DSSERR("can't get IORESOURCE_MEM RFBI\n");
1020                 return -EINVAL;
1021         }
1022
1023         rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
1024                                  resource_size(rfbi_mem));
1025         if (!rfbi.base) {
1026                 DSSERR("can't ioremap RFBI\n");
1027                 return -ENOMEM;
1028         }
1029
1030         clk = clk_get(&pdev->dev, "ick");
1031         if (IS_ERR(clk)) {
1032                 DSSERR("can't get ick\n");
1033                 return PTR_ERR(clk);
1034         }
1035
1036         rfbi.l4_khz = clk_get_rate(clk) / 1000;
1037
1038         clk_put(clk);
1039
1040         pm_runtime_enable(&pdev->dev);
1041
1042         r = rfbi_runtime_get();
1043         if (r)
1044                 goto err_runtime_get;
1045
1046         msleep(10);
1047
1048         rev = rfbi_read_reg(RFBI_REVISION);
1049         dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
1050                FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1051
1052         rfbi_runtime_put();
1053
1054         dss_debugfs_create_file("rfbi", rfbi_dump_regs);
1055
1056         rfbi_probe_pdata(pdev);
1057
1058         return 0;
1059
1060 err_runtime_get:
1061         pm_runtime_disable(&pdev->dev);
1062         return r;
1063 }
1064
1065 static int __exit omap_rfbihw_remove(struct platform_device *pdev)
1066 {
1067         dss_unregister_child_devices(&pdev->dev);
1068         pm_runtime_disable(&pdev->dev);
1069         return 0;
1070 }
1071
1072 static int rfbi_runtime_suspend(struct device *dev)
1073 {
1074         dispc_runtime_put();
1075
1076         return 0;
1077 }
1078
1079 static int rfbi_runtime_resume(struct device *dev)
1080 {
1081         int r;
1082
1083         r = dispc_runtime_get();
1084         if (r < 0)
1085                 return r;
1086
1087         return 0;
1088 }
1089
1090 static const struct dev_pm_ops rfbi_pm_ops = {
1091         .runtime_suspend = rfbi_runtime_suspend,
1092         .runtime_resume = rfbi_runtime_resume,
1093 };
1094
1095 static struct platform_driver omap_rfbihw_driver = {
1096         .remove         = __exit_p(omap_rfbihw_remove),
1097         .driver         = {
1098                 .name   = "omapdss_rfbi",
1099                 .owner  = THIS_MODULE,
1100                 .pm     = &rfbi_pm_ops,
1101         },
1102 };
1103
1104 int __init rfbi_init_platform_driver(void)
1105 {
1106         return platform_driver_probe(&omap_rfbihw_driver, omap_rfbihw_probe);
1107 }
1108
1109 void __exit rfbi_uninit_platform_driver(void)
1110 {
1111         platform_driver_unregister(&omap_rfbihw_driver);
1112 }