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 } rfbi;
 115
 116 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
 117 {
 118         __raw_writel(val, rfbi.base + idx.idx);
 119 }
 120
 121 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
 122 {
 123         return __raw_readl(rfbi.base + idx.idx);
 124 }
 125
 126 static int rfbi_runtime_get(void)
 127 {
 128         int r;
 129
 130         DSSDBG("rfbi_runtime_get\n");
 131
 132         r = pm_runtime_get_sync(&rfbi.pdev->dev);
 133         WARN_ON(r < 0);
 134         return r < 0 ? r : 0;
 135 }
 136
 137 static void rfbi_runtime_put(void)
 138 {
 139         int r;
 140
 141         DSSDBG("rfbi_runtime_put\n");
 142
 143         r = pm_runtime_put_sync(&rfbi.pdev->dev);
 144         WARN_ON(r < 0 && r != -ENOSYS);
 145 }
 146
 147 void rfbi_bus_lock(void)
 148 {
 149         down(&rfbi.bus_lock);
 150 }
 151 EXPORT_SYMBOL(rfbi_bus_lock);
 152
 153 void rfbi_bus_unlock(void)
 154 {
 155         up(&rfbi.bus_lock);
 156 }
 157 EXPORT_SYMBOL(rfbi_bus_unlock);
 158
 159 void omap_rfbi_write_command(const void *buf, u32 len)
 160 {
 161         switch (rfbi.parallelmode) {
 162         case OMAP_DSS_RFBI_PARALLELMODE_8:
 163         {
 164                 const u8 *b = buf;
 165                 for (; len; len--)
 166                         rfbi_write_reg(RFBI_CMD, *b++);
 167                 break;
 168         }
 169
 170         case OMAP_DSS_RFBI_PARALLELMODE_16:
 171         {
 172                 const u16 *w = buf;
 173                 BUG_ON(len & 1);
 174                 for (; len; len -= 2)
 175                         rfbi_write_reg(RFBI_CMD, *w++);
 176                 break;
 177         }
 178
 179         case OMAP_DSS_RFBI_PARALLELMODE_9:
 180         case OMAP_DSS_RFBI_PARALLELMODE_12:
 181         default:
 182                 BUG();
 183         }
 184 }
 185 EXPORT_SYMBOL(omap_rfbi_write_command);
 186
 187 void omap_rfbi_read_data(void *buf, u32 len)
 188 {
 189         switch (rfbi.parallelmode) {
 190         case OMAP_DSS_RFBI_PARALLELMODE_8:
 191         {
 192                 u8 *b = buf;
 193                 for (; len; len--) {
 194                         rfbi_write_reg(RFBI_READ, 0);
 195                         *b++ = rfbi_read_reg(RFBI_READ);
 196                 }
 197                 break;
 198         }
 199
 200         case OMAP_DSS_RFBI_PARALLELMODE_16:
 201         {
 202                 u16 *w = buf;
 203                 BUG_ON(len & ~1);
 204                 for (; len; len -= 2) {
 205                         rfbi_write_reg(RFBI_READ, 0);
 206                         *w++ = rfbi_read_reg(RFBI_READ);
 207                 }
 208                 break;
 209         }
 210
 211         case OMAP_DSS_RFBI_PARALLELMODE_9:
 212         case OMAP_DSS_RFBI_PARALLELMODE_12:
 213         default:
 214                 BUG();
 215         }
 216 }
 217 EXPORT_SYMBOL(omap_rfbi_read_data);
 218
 219 void omap_rfbi_write_data(const void *buf, u32 len)
 220 {
 221         switch (rfbi.parallelmode) {
 222         case OMAP_DSS_RFBI_PARALLELMODE_8:
 223         {
 224                 const u8 *b = buf;
 225                 for (; len; len--)
 226                         rfbi_write_reg(RFBI_PARAM, *b++);
 227                 break;
 228         }
 229
 230         case OMAP_DSS_RFBI_PARALLELMODE_16:
 231         {
 232                 const u16 *w = buf;
 233                 BUG_ON(len & 1);
 234                 for (; len; len -= 2)
 235                         rfbi_write_reg(RFBI_PARAM, *w++);
 236                 break;
 237         }
 238
 239         case OMAP_DSS_RFBI_PARALLELMODE_9:
 240         case OMAP_DSS_RFBI_PARALLELMODE_12:
 241         default:
 242                 BUG();
 243
 244         }
 245 }
 246 EXPORT_SYMBOL(omap_rfbi_write_data);
 247
 248 void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
 249                 u16 x, u16 y,
 250                 u16 w, u16 h)
 251 {
 252         int start_offset = scr_width * y + x;
 253         int horiz_offset = scr_width - w;
 254         int i;
 255
 256         if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 257            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 258                 const u16 __iomem *pd = buf;
 259                 pd += start_offset;
 260
 261                 for (; h; --h) {
 262                         for (i = 0; i < w; ++i) {
 263                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 264                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 265                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 266                                 ++pd;
 267                         }
 268                         pd += horiz_offset;
 269                 }
 270         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
 271            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 272                 const u32 __iomem *pd = buf;
 273                 pd += start_offset;
 274
 275                 for (; h; --h) {
 276                         for (i = 0; i < w; ++i) {
 277                                 const u8 __iomem *b = (const u8 __iomem *)pd;
 278                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
 279                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 280                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 281                                 ++pd;
 282                         }
 283                         pd += horiz_offset;
 284                 }
 285         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 286            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
 287                 const u16 __iomem *pd = buf;
 288                 pd += start_offset;
 289
 290                 for (; h; --h) {
 291                         for (i = 0; i < w; ++i) {
 292                                 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
 293                                 ++pd;
 294                         }
 295                         pd += horiz_offset;
 296                 }
 297         } else {
 298                 BUG();
 299         }
 300 }
 301 EXPORT_SYMBOL(omap_rfbi_write_pixels);
 302
 303 static int rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width,
 304                 u16 height, void (*callback)(void *data), void *data)
 305 {
 306         u32 l;
 307         int r;
 308         struct omap_video_timings timings = {
 309                 .hsw            = 1,
 310                 .hfp            = 1,
 311                 .hbp            = 1,
 312                 .vsw            = 1,
 313                 .vfp            = 0,
 314                 .vbp            = 0,
 315                 .x_res          = width,
 316                 .y_res          = height,
 317         };
 318
 319         /*BUG_ON(callback == 0);*/
 320         BUG_ON(rfbi.framedone_callback != NULL);
 321
 322         DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 323
 324         dss_mgr_set_timings(dssdev->manager, &timings);
 325
 326         r = dss_mgr_enable(dssdev->manager);
 327         if (r)
 328                 return r;
 329
 330         rfbi.framedone_callback = callback;
 331         rfbi.framedone_callback_data = data;
 332
 333         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 334
 335         l = rfbi_read_reg(RFBI_CONTROL);
 336         l = FLD_MOD(l, 1, 0, 0); /* enable */
 337         if (!rfbi.te_enabled)
 338                 l = FLD_MOD(l, 1, 4, 4); /* ITE */
 339
 340         rfbi_write_reg(RFBI_CONTROL, l);
 341
 342         return 0;
 343 }
 344
 345 static void framedone_callback(void *data, u32 mask)
 346 {
 347         void (*callback)(void *data);
 348
 349         DSSDBG("FRAMEDONE\n");
 350
 351         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 352
 353         callback = rfbi.framedone_callback;
 354         rfbi.framedone_callback = NULL;
 355
 356         if (callback != NULL)
 357                 callback(rfbi.framedone_callback_data);
 358 }
 359
 360 #if 1 /* VERBOSE */
 361 static void rfbi_print_timings(void)
 362 {
 363         u32 l;
 364         u32 time;
 365
 366         l = rfbi_read_reg(RFBI_CONFIG(0));
 367         time = 1000000000 / rfbi.l4_khz;
 368         if (l & (1 << 4))
 369                 time *= 2;
 370
 371         DSSDBG("Tick time %u ps\n", time);
 372         l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
 373         DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
 374                 "REONTIME %d, REOFFTIME %d\n",
 375                 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
 376                 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
 377
 378         l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
 379         DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
 380                 "ACCESSTIME %d\n",
 381                 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
 382                 (l >> 22) & 0x3f);
 383 }
 384 #else
 385 static void rfbi_print_timings(void) {}
 386 #endif
 387
 388
 389
 390
 391 static u32 extif_clk_period;
 392
 393 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
 394 {
 395         int bus_tick = extif_clk_period * div;
 396         return (ps + bus_tick - 1) / bus_tick * bus_tick;
 397 }
 398
 399 static int calc_reg_timing(struct rfbi_timings *t, int div)
 400 {
 401         t->clk_div = div;
 402
 403         t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
 404
 405         t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
 406         t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
 407         t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
 408
 409         t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
 410         t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
 411         t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
 412
 413         t->access_time = round_to_extif_ticks(t->access_time, div);
 414         t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
 415         t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
 416
 417         DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
 418                t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
 419         DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
 420                t->we_on_time, t->we_off_time, t->re_cycle_time,
 421                t->we_cycle_time);
 422         DSSDBG("[reg]rdaccess %d cspulse %d\n",
 423                t->access_time, t->cs_pulse_width);
 424
 425         return rfbi_convert_timings(t);
 426 }
 427
 428 static int calc_extif_timings(struct rfbi_timings *t)
 429 {
 430         u32 max_clk_div;
 431         int div;
 432
 433         rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
 434         for (div = 1; div <= max_clk_div; div++) {
 435                 if (calc_reg_timing(t, div) == 0)
 436                         break;
 437         }
 438
 439         if (div <= max_clk_div)
 440                 return 0;
 441
 442         DSSERR("can't setup timings\n");
 443         return -1;
 444 }
 445
 446
 447 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 448 {
 449         int r;
 450
 451         if (!t->converted) {
 452                 r = calc_extif_timings(t);
 453                 if (r < 0)
 454                         DSSERR("Failed to calc timings\n");
 455         }
 456
 457         BUG_ON(!t->converted);
 458
 459         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
 460         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 461
 462         /* TIMEGRANULARITY */
 463         REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
 464                     (t->tim[2] ? 1 : 0), 4, 4);
 465
 466         rfbi_print_timings();
 467 }
 468
 469 static int ps_to_rfbi_ticks(int time, int div)
 470 {
 471         unsigned long tick_ps;
 472         int ret;
 473
 474         /* Calculate in picosecs to yield more exact results */
 475         tick_ps = 1000000000 / (rfbi.l4_khz) * div;
 476
 477         ret = (time + tick_ps - 1) / tick_ps;
 478
 479         return ret;
 480 }
 481
 482 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
 483 {
 484         *clk_period = 1000000000 / rfbi.l4_khz;
 485         *max_clk_div = 2;
 486 }
 487
 488 static int rfbi_convert_timings(struct rfbi_timings *t)
 489 {
 490         u32 l;
 491         int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
 492         int actim, recyc, wecyc;
 493         int div = t->clk_div;
 494
 495         if (div <= 0 || div > 2)
 496                 return -1;
 497
 498         /* Make sure that after conversion it still holds that:
 499          * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
 500          * csoff > cson, csoff >= max(weoff, reoff), actim > reon
 501          */
 502         weon = ps_to_rfbi_ticks(t->we_on_time, div);
 503         weoff = ps_to_rfbi_ticks(t->we_off_time, div);
 504         if (weoff <= weon)
 505                 weoff = weon + 1;
 506         if (weon > 0x0f)
 507                 return -1;
 508         if (weoff > 0x3f)
 509                 return -1;
 510
 511         reon = ps_to_rfbi_ticks(t->re_on_time, div);
 512         reoff = ps_to_rfbi_ticks(t->re_off_time, div);
 513         if (reoff <= reon)
 514                 reoff = reon + 1;
 515         if (reon > 0x0f)
 516                 return -1;
 517         if (reoff > 0x3f)
 518                 return -1;
 519
 520         cson = ps_to_rfbi_ticks(t->cs_on_time, div);
 521         csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
 522         if (csoff <= cson)
 523                 csoff = cson + 1;
 524         if (csoff < max(weoff, reoff))
 525                 csoff = max(weoff, reoff);
 526         if (cson > 0x0f)
 527                 return -1;
 528         if (csoff > 0x3f)
 529                 return -1;
 530
 531         l =  cson;
 532         l |= csoff << 4;
 533         l |= weon  << 10;
 534         l |= weoff << 14;
 535         l |= reon  << 20;
 536         l |= reoff << 24;
 537
 538         t->tim[0] = l;
 539
 540         actim = ps_to_rfbi_ticks(t->access_time, div);
 541         if (actim <= reon)
 542                 actim = reon + 1;
 543         if (actim > 0x3f)
 544                 return -1;
 545
 546         wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
 547         if (wecyc < weoff)
 548                 wecyc = weoff;
 549         if (wecyc > 0x3f)
 550                 return -1;
 551
 552         recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
 553         if (recyc < reoff)
 554                 recyc = reoff;
 555         if (recyc > 0x3f)
 556                 return -1;
 557
 558         cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
 559         if (cs_pulse > 0x3f)
 560                 return -1;
 561
 562         l =  wecyc;
 563         l |= recyc    << 6;
 564         l |= cs_pulse << 12;
 565         l |= actim    << 22;
 566
 567         t->tim[1] = l;
 568
 569         t->tim[2] = div - 1;
 570
 571         t->converted = 1;
 572
 573         return 0;
 574 }
 575
 576 /* xxx FIX module selection missing */
 577 int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
 578                              unsigned hs_pulse_time, unsigned vs_pulse_time,
 579                              int hs_pol_inv, int vs_pol_inv, int extif_div)
 580 {
 581         int hs, vs;
 582         int min;
 583         u32 l;
 584
 585         hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
 586         vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
 587         if (hs < 2)
 588                 return -EDOM;
 589         if (mode == OMAP_DSS_RFBI_TE_MODE_2)
 590                 min = 2;
 591         else /* OMAP_DSS_RFBI_TE_MODE_1 */
 592                 min = 4;
 593         if (vs < min)
 594                 return -EDOM;
 595         if (vs == hs)
 596                 return -EINVAL;
 597         rfbi.te_mode = mode;
 598         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
 599                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
 600
 601         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
 602         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 603
 604         l = rfbi_read_reg(RFBI_CONFIG(0));
 605         if (hs_pol_inv)
 606                 l &= ~(1 << 21);
 607         else
 608                 l |= 1 << 21;
 609         if (vs_pol_inv)
 610                 l &= ~(1 << 20);
 611         else
 612                 l |= 1 << 20;
 613
 614         return 0;
 615 }
 616 EXPORT_SYMBOL(omap_rfbi_setup_te);
 617
 618 /* xxx FIX module selection missing */
 619 int omap_rfbi_enable_te(bool enable, unsigned line)
 620 {
 621         u32 l;
 622
 623         DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 624         if (line > (1 << 11) - 1)
 625                 return -EINVAL;
 626
 627         l = rfbi_read_reg(RFBI_CONFIG(0));
 628         l &= ~(0x3 << 2);
 629         if (enable) {
 630                 rfbi.te_enabled = 1;
 631                 l |= rfbi.te_mode << 2;
 632         } else
 633                 rfbi.te_enabled = 0;
 634         rfbi_write_reg(RFBI_CONFIG(0), l);
 635         rfbi_write_reg(RFBI_LINE_NUMBER, line);
 636
 637         return 0;
 638 }
 639 EXPORT_SYMBOL(omap_rfbi_enable_te);
 640
 641 static int rfbi_configure(int rfbi_module, int bpp, int lines)
 642 {
 643         u32 l;
 644         int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 645         enum omap_rfbi_cycleformat cycleformat;
 646         enum omap_rfbi_datatype datatype;
 647         enum omap_rfbi_parallelmode parallelmode;
 648
 649         switch (bpp) {
 650         case 12:
 651                 datatype = OMAP_DSS_RFBI_DATATYPE_12;
 652                 break;
 653         case 16:
 654                 datatype = OMAP_DSS_RFBI_DATATYPE_16;
 655                 break;
 656         case 18:
 657                 datatype = OMAP_DSS_RFBI_DATATYPE_18;
 658                 break;
 659         case 24:
 660                 datatype = OMAP_DSS_RFBI_DATATYPE_24;
 661                 break;
 662         default:
 663                 BUG();
 664                 return 1;
 665         }
 666         rfbi.datatype = datatype;
 667
 668         switch (lines) {
 669         case 8:
 670                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 671                 break;
 672         case 9:
 673                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 674                 break;
 675         case 12:
 676                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 677                 break;
 678         case 16:
 679                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 680                 break;
 681         default:
 682                 BUG();
 683                 return 1;
 684         }
 685         rfbi.parallelmode = parallelmode;
 686
 687         if ((bpp % lines) == 0) {
 688                 switch (bpp / lines) {
 689                 case 1:
 690                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 691                         break;
 692                 case 2:
 693                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 694                         break;
 695                 case 3:
 696                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 697                         break;
 698                 default:
 699                         BUG();
 700                         return 1;
 701                 }
 702         } else if ((2 * bpp % lines) == 0) {
 703                 if ((2 * bpp / lines) == 3)
 704                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 705                 else {
 706                         BUG();
 707                         return 1;
 708                 }
 709         } else {
 710                 BUG();
 711                 return 1;
 712         }
 713
 714         switch (cycleformat) {
 715         case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 716                 cycle1 = lines;
 717                 break;
 718
 719         case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 720                 cycle1 = lines;
 721                 cycle2 = lines;
 722                 break;
 723
 724         case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 725                 cycle1 = lines;
 726                 cycle2 = lines;
 727                 cycle3 = lines;
 728                 break;
 729
 730         case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 731                 cycle1 = lines;
 732                 cycle2 = (lines / 2) | ((lines / 2) << 16);
 733                 cycle3 = (lines << 16);
 734                 break;
 735         }
 736
 737         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 738
 739         l = 0;
 740         l |= FLD_VAL(parallelmode, 1, 0);
 741         l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 742         l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 743         l |= FLD_VAL(datatype, 6, 5);
 744         /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 745         l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 746         l |= FLD_VAL(cycleformat, 10, 9);
 747         l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 748         l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 749         l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 750         l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 751         l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 752         l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 753         l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 754         rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 755
 756         rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 757         rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 758         rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 759
 760
 761         l = rfbi_read_reg(RFBI_CONTROL);
 762         l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 763         l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 764         rfbi_write_reg(RFBI_CONTROL, l);
 765
 766
 767         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 768                bpp, lines, cycle1, cycle2, cycle3);
 769
 770         return 0;
 771 }
 772
 773 int omap_rfbi_configure(struct omap_dss_device *dssdev, int pixel_size,
 774                 int data_lines)
 775 {
 776         return rfbi_configure(dssdev->phy.rfbi.channel, pixel_size, data_lines);
 777 }
 778 EXPORT_SYMBOL(omap_rfbi_configure);
 779
 780 int omap_rfbi_prepare_update(struct omap_dss_device *dssdev,
 781                 u16 *x, u16 *y, u16 *w, u16 *h)
 782 {
 783         u16 dw, dh;
 784         struct omap_video_timings timings = {
 785                 .hsw            = 1,
 786                 .hfp            = 1,
 787                 .hbp            = 1,
 788                 .vsw            = 1,
 789                 .vfp            = 0,
 790                 .vbp            = 0,
 791                 .x_res          = *w,
 792                 .y_res          = *h,
 793         };
 794
 795         dssdev->driver->get_resolution(dssdev, &dw, &dh);
 796
 797         if  (*x > dw || *y > dh)
 798                 return -EINVAL;
 799
 800         if (*x + *w > dw)
 801                 return -EINVAL;
 802
 803         if (*y + *h > dh)
 804                 return -EINVAL;
 805
 806         if (*w == 1)
 807                 return -EINVAL;
 808
 809         if (*w == 0 || *h == 0)
 810                 return -EINVAL;
 811
 812         dss_mgr_set_timings(dssdev->manager, &timings);
 813
 814         return 0;
 815 }
 816 EXPORT_SYMBOL(omap_rfbi_prepare_update);
 817
 818 int omap_rfbi_update(struct omap_dss_device *dssdev,
 819                 u16 x, u16 y, u16 w, u16 h,
 820                 void (*callback)(void *), void *data)
 821 {
 822         int r;
 823
 824         r = rfbi_transfer_area(dssdev, w, h, callback, data);
 825
 826         return r;
 827 }
 828 EXPORT_SYMBOL(omap_rfbi_update);
 829
 830 static void rfbi_dump_regs(struct seq_file *s)
 831 {
 832 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 833
 834         if (rfbi_runtime_get())
 835                 return;
 836
 837         DUMPREG(RFBI_REVISION);
 838         DUMPREG(RFBI_SYSCONFIG);
 839         DUMPREG(RFBI_SYSSTATUS);
 840         DUMPREG(RFBI_CONTROL);
 841         DUMPREG(RFBI_PIXEL_CNT);
 842         DUMPREG(RFBI_LINE_NUMBER);
 843         DUMPREG(RFBI_CMD);
 844         DUMPREG(RFBI_PARAM);
 845         DUMPREG(RFBI_DATA);
 846         DUMPREG(RFBI_READ);
 847         DUMPREG(RFBI_STATUS);
 848
 849         DUMPREG(RFBI_CONFIG(0));
 850         DUMPREG(RFBI_ONOFF_TIME(0));
 851         DUMPREG(RFBI_CYCLE_TIME(0));
 852         DUMPREG(RFBI_DATA_CYCLE1(0));
 853         DUMPREG(RFBI_DATA_CYCLE2(0));
 854         DUMPREG(RFBI_DATA_CYCLE3(0));
 855
 856         DUMPREG(RFBI_CONFIG(1));
 857         DUMPREG(RFBI_ONOFF_TIME(1));
 858         DUMPREG(RFBI_CYCLE_TIME(1));
 859         DUMPREG(RFBI_DATA_CYCLE1(1));
 860         DUMPREG(RFBI_DATA_CYCLE2(1));
 861         DUMPREG(RFBI_DATA_CYCLE3(1));
 862
 863         DUMPREG(RFBI_VSYNC_WIDTH);
 864         DUMPREG(RFBI_HSYNC_WIDTH);
 865
 866         rfbi_runtime_put();
 867 #undef DUMPREG
 868 }
 869
 870 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 871 {
 872         struct dss_lcd_mgr_config mgr_config;
 873
 874         mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
 875
 876         mgr_config.stallmode = true;
 877         /* Do we need fifohandcheck for RFBI? */
 878         mgr_config.fifohandcheck = false;
 879
 880         mgr_config.video_port_width = dssdev->ctrl.pixel_size;
 881         mgr_config.lcden_sig_polarity = 0;
 882
 883         dss_mgr_set_lcd_config(dssdev->manager, &mgr_config);
 884 }
 885
 886 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 887 {
 888         int r;
 889
 890         if (dssdev->manager == NULL) {
 891                 DSSERR("failed to enable display: no manager\n");
 892                 return -ENODEV;
 893         }
 894
 895         r = rfbi_runtime_get();
 896         if (r)
 897                 return r;
 898
 899         r = omap_dss_start_device(dssdev);
 900         if (r) {
 901                 DSSERR("failed to start device\n");
 902                 goto err0;
 903         }
 904
 905         r = omap_dispc_register_isr(framedone_callback, NULL,
 906                         DISPC_IRQ_FRAMEDONE);
 907         if (r) {
 908                 DSSERR("can't get FRAMEDONE irq\n");
 909                 goto err1;
 910         }
 911
 912         rfbi_config_lcd_manager(dssdev);
 913
 914         rfbi_configure(dssdev->phy.rfbi.channel,
 915                                dssdev->ctrl.pixel_size,
 916                                dssdev->phy.rfbi.data_lines);
 917
 918         rfbi_set_timings(dssdev->phy.rfbi.channel,
 919                          &dssdev->ctrl.rfbi_timings);
 920
 921
 922         return 0;
 923 err1:
 924         omap_dss_stop_device(dssdev);
 925 err0:
 926         rfbi_runtime_put();
 927         return r;
 928 }
 929 EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 930
 931 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 932 {
 933         omap_dispc_unregister_isr(framedone_callback, NULL,
 934                         DISPC_IRQ_FRAMEDONE);
 935         omap_dss_stop_device(dssdev);
 936
 937         rfbi_runtime_put();
 938 }
 939 EXPORT_SYMBOL(omapdss_rfbi_display_disable);
 940
 941 static int __init rfbi_init_display(struct omap_dss_device *dssdev)
 942 {
 943         rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 944         dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
 945         return 0;
 946 }
 947
 948 static void __init rfbi_probe_pdata(struct platform_device *pdev)
 949 {
 950         struct omap_dss_board_info *pdata = pdev->dev.platform_data;
 951         int i, r;
 952
 953         for (i = 0; i < pdata->num_devices; ++i) {
 954                 struct omap_dss_device *dssdev = pdata->devices[i];
 955
 956                 if (dssdev->type != OMAP_DISPLAY_TYPE_DBI)
 957                         continue;
 958
 959                 r = rfbi_init_display(dssdev);
 960                 if (r) {
 961                         DSSERR("device %s init failed: %d\n", dssdev->name, r);
 962                         continue;
 963                 }
 964
 965                 r = omap_dss_register_device(dssdev, &pdev->dev, i);
 966                 if (r)
 967                         DSSERR("device %s register failed: %d\n",
 968                                 dssdev->name, r);
 969         }
 970 }
 971
 972 /* RFBI HW IP initialisation */
 973 static int __init omap_rfbihw_probe(struct platform_device *pdev)
 974 {
 975         u32 rev;
 976         struct resource *rfbi_mem;
 977         struct clk *clk;
 978         int r;
 979
 980         rfbi.pdev = pdev;
 981
 982         sema_init(&rfbi.bus_lock, 1);
 983
 984         rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
 985         if (!rfbi_mem) {
 986                 DSSERR("can't get IORESOURCE_MEM RFBI\n");
 987                 return -EINVAL;
 988         }
 989
 990         rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
 991                                  resource_size(rfbi_mem));
 992         if (!rfbi.base) {
 993                 DSSERR("can't ioremap RFBI\n");
 994                 return -ENOMEM;
 995         }
 996
 997         clk = clk_get(&pdev->dev, "ick");
 998         if (IS_ERR(clk)) {
 999                 DSSERR("can't get ick\n");
1000                 return PTR_ERR(clk);
1001         }
1002
1003         rfbi.l4_khz = clk_get_rate(clk) / 1000;
1004
1005         clk_put(clk);
1006
1007         pm_runtime_enable(&pdev->dev);
1008
1009         r = rfbi_runtime_get();
1010         if (r)
1011                 goto err_runtime_get;
1012
1013         msleep(10);
1014
1015         rev = rfbi_read_reg(RFBI_REVISION);
1016         dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
1017                FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1018
1019         rfbi_runtime_put();
1020
1021         dss_debugfs_create_file("rfbi", rfbi_dump_regs);
1022
1023         rfbi_probe_pdata(pdev);
1024
1025         return 0;
1026
1027 err_runtime_get:
1028         pm_runtime_disable(&pdev->dev);
1029         return r;
1030 }
1031
1032 static int __exit omap_rfbihw_remove(struct platform_device *pdev)
1033 {
1034         omap_dss_unregister_child_devices(&pdev->dev);
1035         pm_runtime_disable(&pdev->dev);
1036         return 0;
1037 }
1038
1039 static int rfbi_runtime_suspend(struct device *dev)
1040 {
1041         dispc_runtime_put();
1042
1043         return 0;
1044 }
1045
1046 static int rfbi_runtime_resume(struct device *dev)
1047 {
1048         int r;
1049
1050         r = dispc_runtime_get();
1051         if (r < 0)
1052                 return r;
1053
1054         return 0;
1055 }
1056
1057 static const struct dev_pm_ops rfbi_pm_ops = {
1058         .runtime_suspend = rfbi_runtime_suspend,
1059         .runtime_resume = rfbi_runtime_resume,
1060 };
1061
1062 static struct platform_driver omap_rfbihw_driver = {
1063         .remove         = __exit_p(omap_rfbihw_remove),
1064         .driver         = {
1065                 .name   = "omapdss_rfbi",
1066                 .owner  = THIS_MODULE,
1067                 .pm     = &rfbi_pm_ops,
1068         },
1069 };
1070
1071 int __init rfbi_init_platform_driver(void)
1072 {
1073         return platform_driver_probe(&omap_rfbihw_driver, omap_rfbihw_probe);
1074 }
1075
1076 void __exit rfbi_uninit_platform_driver(void)
1077 {
1078         platform_driver_unregister(&omap_rfbihw_driver);
1079 }