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