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
 308         /*BUG_ON(callback == 0);*/
 309         BUG_ON(rfbi.framedone_callback != NULL);
 310
 311         DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 312
 313         dispc_mgr_set_lcd_size(dssdev->manager->id, width, height);
 314
 315         dispc_mgr_enable(dssdev->manager->id, true);
 316
 317         rfbi.framedone_callback = callback;
 318         rfbi.framedone_callback_data = data;
 319
 320         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 321
 322         l = rfbi_read_reg(RFBI_CONTROL);
 323         l = FLD_MOD(l, 1, 0, 0); /* enable */
 324         if (!rfbi.te_enabled)
 325                 l = FLD_MOD(l, 1, 4, 4); /* ITE */
 326
 327         rfbi_write_reg(RFBI_CONTROL, l);
 328 }
 329
 330 static void framedone_callback(void *data, u32 mask)
 331 {
 332         void (*callback)(void *data);
 333
 334         DSSDBG("FRAMEDONE\n");
 335
 336         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 337
 338         callback = rfbi.framedone_callback;
 339         rfbi.framedone_callback = NULL;
 340
 341         if (callback != NULL)
 342                 callback(rfbi.framedone_callback_data);
 343 }
 344
 345 #if 1 /* VERBOSE */
 346 static void rfbi_print_timings(void)
 347 {
 348         u32 l;
 349         u32 time;
 350
 351         l = rfbi_read_reg(RFBI_CONFIG(0));
 352         time = 1000000000 / rfbi.l4_khz;
 353         if (l & (1 << 4))
 354                 time *= 2;
 355
 356         DSSDBG("Tick time %u ps\n", time);
 357         l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
 358         DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
 359                 "REONTIME %d, REOFFTIME %d\n",
 360                 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
 361                 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
 362
 363         l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
 364         DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
 365                 "ACCESSTIME %d\n",
 366                 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
 367                 (l >> 22) & 0x3f);
 368 }
 369 #else
 370 static void rfbi_print_timings(void) {}
 371 #endif
 372
 373
 374
 375
 376 static u32 extif_clk_period;
 377
 378 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
 379 {
 380         int bus_tick = extif_clk_period * div;
 381         return (ps + bus_tick - 1) / bus_tick * bus_tick;
 382 }
 383
 384 static int calc_reg_timing(struct rfbi_timings *t, int div)
 385 {
 386         t->clk_div = div;
 387
 388         t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
 389
 390         t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
 391         t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
 392         t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
 393
 394         t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
 395         t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
 396         t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
 397
 398         t->access_time = round_to_extif_ticks(t->access_time, div);
 399         t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
 400         t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
 401
 402         DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
 403                t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
 404         DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
 405                t->we_on_time, t->we_off_time, t->re_cycle_time,
 406                t->we_cycle_time);
 407         DSSDBG("[reg]rdaccess %d cspulse %d\n",
 408                t->access_time, t->cs_pulse_width);
 409
 410         return rfbi_convert_timings(t);
 411 }
 412
 413 static int calc_extif_timings(struct rfbi_timings *t)
 414 {
 415         u32 max_clk_div;
 416         int div;
 417
 418         rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
 419         for (div = 1; div <= max_clk_div; div++) {
 420                 if (calc_reg_timing(t, div) == 0)
 421                         break;
 422         }
 423
 424         if (div <= max_clk_div)
 425                 return 0;
 426
 427         DSSERR("can't setup timings\n");
 428         return -1;
 429 }
 430
 431
 432 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 433 {
 434         int r;
 435
 436         if (!t->converted) {
 437                 r = calc_extif_timings(t);
 438                 if (r < 0)
 439                         DSSERR("Failed to calc timings\n");
 440         }
 441
 442         BUG_ON(!t->converted);
 443
 444         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
 445         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 446
 447         /* TIMEGRANULARITY */
 448         REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
 449                     (t->tim[2] ? 1 : 0), 4, 4);
 450
 451         rfbi_print_timings();
 452 }
 453
 454 static int ps_to_rfbi_ticks(int time, int div)
 455 {
 456         unsigned long tick_ps;
 457         int ret;
 458
 459         /* Calculate in picosecs to yield more exact results */
 460         tick_ps = 1000000000 / (rfbi.l4_khz) * div;
 461
 462         ret = (time + tick_ps - 1) / tick_ps;
 463
 464         return ret;
 465 }
 466
 467 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
 468 {
 469         *clk_period = 1000000000 / rfbi.l4_khz;
 470         *max_clk_div = 2;
 471 }
 472
 473 static int rfbi_convert_timings(struct rfbi_timings *t)
 474 {
 475         u32 l;
 476         int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
 477         int actim, recyc, wecyc;
 478         int div = t->clk_div;
 479
 480         if (div <= 0 || div > 2)
 481                 return -1;
 482
 483         /* Make sure that after conversion it still holds that:
 484          * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
 485          * csoff > cson, csoff >= max(weoff, reoff), actim > reon
 486          */
 487         weon = ps_to_rfbi_ticks(t->we_on_time, div);
 488         weoff = ps_to_rfbi_ticks(t->we_off_time, div);
 489         if (weoff <= weon)
 490                 weoff = weon + 1;
 491         if (weon > 0x0f)
 492                 return -1;
 493         if (weoff > 0x3f)
 494                 return -1;
 495
 496         reon = ps_to_rfbi_ticks(t->re_on_time, div);
 497         reoff = ps_to_rfbi_ticks(t->re_off_time, div);
 498         if (reoff <= reon)
 499                 reoff = reon + 1;
 500         if (reon > 0x0f)
 501                 return -1;
 502         if (reoff > 0x3f)
 503                 return -1;
 504
 505         cson = ps_to_rfbi_ticks(t->cs_on_time, div);
 506         csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
 507         if (csoff <= cson)
 508                 csoff = cson + 1;
 509         if (csoff < max(weoff, reoff))
 510                 csoff = max(weoff, reoff);
 511         if (cson > 0x0f)
 512                 return -1;
 513         if (csoff > 0x3f)
 514                 return -1;
 515
 516         l =  cson;
 517         l |= csoff << 4;
 518         l |= weon  << 10;
 519         l |= weoff << 14;
 520         l |= reon  << 20;
 521         l |= reoff << 24;
 522
 523         t->tim[0] = l;
 524
 525         actim = ps_to_rfbi_ticks(t->access_time, div);
 526         if (actim <= reon)
 527                 actim = reon + 1;
 528         if (actim > 0x3f)
 529                 return -1;
 530
 531         wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
 532         if (wecyc < weoff)
 533                 wecyc = weoff;
 534         if (wecyc > 0x3f)
 535                 return -1;
 536
 537         recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
 538         if (recyc < reoff)
 539                 recyc = reoff;
 540         if (recyc > 0x3f)
 541                 return -1;
 542
 543         cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
 544         if (cs_pulse > 0x3f)
 545                 return -1;
 546
 547         l =  wecyc;
 548         l |= recyc    << 6;
 549         l |= cs_pulse << 12;
 550         l |= actim    << 22;
 551
 552         t->tim[1] = l;
 553
 554         t->tim[2] = div - 1;
 555
 556         t->converted = 1;
 557
 558         return 0;
 559 }
 560
 561 /* xxx FIX module selection missing */
 562 int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
 563                              unsigned hs_pulse_time, unsigned vs_pulse_time,
 564                              int hs_pol_inv, int vs_pol_inv, int extif_div)
 565 {
 566         int hs, vs;
 567         int min;
 568         u32 l;
 569
 570         hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
 571         vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
 572         if (hs < 2)
 573                 return -EDOM;
 574         if (mode == OMAP_DSS_RFBI_TE_MODE_2)
 575                 min = 2;
 576         else /* OMAP_DSS_RFBI_TE_MODE_1 */
 577                 min = 4;
 578         if (vs < min)
 579                 return -EDOM;
 580         if (vs == hs)
 581                 return -EINVAL;
 582         rfbi.te_mode = mode;
 583         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
 584                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
 585
 586         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
 587         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 588
 589         l = rfbi_read_reg(RFBI_CONFIG(0));
 590         if (hs_pol_inv)
 591                 l &= ~(1 << 21);
 592         else
 593                 l |= 1 << 21;
 594         if (vs_pol_inv)
 595                 l &= ~(1 << 20);
 596         else
 597                 l |= 1 << 20;
 598
 599         return 0;
 600 }
 601 EXPORT_SYMBOL(omap_rfbi_setup_te);
 602
 603 /* xxx FIX module selection missing */
 604 int omap_rfbi_enable_te(bool enable, unsigned line)
 605 {
 606         u32 l;
 607
 608         DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 609         if (line > (1 << 11) - 1)
 610                 return -EINVAL;
 611
 612         l = rfbi_read_reg(RFBI_CONFIG(0));
 613         l &= ~(0x3 << 2);
 614         if (enable) {
 615                 rfbi.te_enabled = 1;
 616                 l |= rfbi.te_mode << 2;
 617         } else
 618                 rfbi.te_enabled = 0;
 619         rfbi_write_reg(RFBI_CONFIG(0), l);
 620         rfbi_write_reg(RFBI_LINE_NUMBER, line);
 621
 622         return 0;
 623 }
 624 EXPORT_SYMBOL(omap_rfbi_enable_te);
 625
 626 static int rfbi_configure(int rfbi_module, int bpp, int lines)
 627 {
 628         u32 l;
 629         int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 630         enum omap_rfbi_cycleformat cycleformat;
 631         enum omap_rfbi_datatype datatype;
 632         enum omap_rfbi_parallelmode parallelmode;
 633
 634         switch (bpp) {
 635         case 12:
 636                 datatype = OMAP_DSS_RFBI_DATATYPE_12;
 637                 break;
 638         case 16:
 639                 datatype = OMAP_DSS_RFBI_DATATYPE_16;
 640                 break;
 641         case 18:
 642                 datatype = OMAP_DSS_RFBI_DATATYPE_18;
 643                 break;
 644         case 24:
 645                 datatype = OMAP_DSS_RFBI_DATATYPE_24;
 646                 break;
 647         default:
 648                 BUG();
 649                 return 1;
 650         }
 651         rfbi.datatype = datatype;
 652
 653         switch (lines) {
 654         case 8:
 655                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 656                 break;
 657         case 9:
 658                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 659                 break;
 660         case 12:
 661                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 662                 break;
 663         case 16:
 664                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 665                 break;
 666         default:
 667                 BUG();
 668                 return 1;
 669         }
 670         rfbi.parallelmode = parallelmode;
 671
 672         if ((bpp % lines) == 0) {
 673                 switch (bpp / lines) {
 674                 case 1:
 675                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 676                         break;
 677                 case 2:
 678                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 679                         break;
 680                 case 3:
 681                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 682                         break;
 683                 default:
 684                         BUG();
 685                         return 1;
 686                 }
 687         } else if ((2 * bpp % lines) == 0) {
 688                 if ((2 * bpp / lines) == 3)
 689                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 690                 else {
 691                         BUG();
 692                         return 1;
 693                 }
 694         } else {
 695                 BUG();
 696                 return 1;
 697         }
 698
 699         switch (cycleformat) {
 700         case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 701                 cycle1 = lines;
 702                 break;
 703
 704         case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 705                 cycle1 = lines;
 706                 cycle2 = lines;
 707                 break;
 708
 709         case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 710                 cycle1 = lines;
 711                 cycle2 = lines;
 712                 cycle3 = lines;
 713                 break;
 714
 715         case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 716                 cycle1 = lines;
 717                 cycle2 = (lines / 2) | ((lines / 2) << 16);
 718                 cycle3 = (lines << 16);
 719                 break;
 720         }
 721
 722         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 723
 724         l = 0;
 725         l |= FLD_VAL(parallelmode, 1, 0);
 726         l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 727         l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 728         l |= FLD_VAL(datatype, 6, 5);
 729         /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 730         l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 731         l |= FLD_VAL(cycleformat, 10, 9);
 732         l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 733         l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 734         l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 735         l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 736         l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 737         l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 738         l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 739         rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 740
 741         rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 742         rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 743         rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 744
 745
 746         l = rfbi_read_reg(RFBI_CONTROL);
 747         l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 748         l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 749         rfbi_write_reg(RFBI_CONTROL, l);
 750
 751
 752         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 753                bpp, lines, cycle1, cycle2, cycle3);
 754
 755         return 0;
 756 }
 757
 758 int omap_rfbi_configure(struct omap_dss_device *dssdev, int pixel_size,
 759                 int data_lines)
 760 {
 761         return rfbi_configure(dssdev->phy.rfbi.channel, pixel_size, data_lines);
 762 }
 763 EXPORT_SYMBOL(omap_rfbi_configure);
 764
 765 int omap_rfbi_prepare_update(struct omap_dss_device *dssdev,
 766                 u16 *x, u16 *y, u16 *w, u16 *h)
 767 {
 768         u16 dw, dh;
 769
 770         dssdev->driver->get_resolution(dssdev, &dw, &dh);
 771
 772         if  (*x > dw || *y > dh)
 773                 return -EINVAL;
 774
 775         if (*x + *w > dw)
 776                 return -EINVAL;
 777
 778         if (*y + *h > dh)
 779                 return -EINVAL;
 780
 781         if (*w == 1)
 782                 return -EINVAL;
 783
 784         if (*w == 0 || *h == 0)
 785                 return -EINVAL;
 786
 787         dss_setup_partial_planes(dssdev, x, y, w, h, true);
 788         dispc_mgr_set_lcd_size(dssdev->manager->id, *w, *h);
 789
 790         return 0;
 791 }
 792 EXPORT_SYMBOL(omap_rfbi_prepare_update);
 793
 794 int omap_rfbi_update(struct omap_dss_device *dssdev,
 795                 u16 x, u16 y, u16 w, u16 h,
 796                 void (*callback)(void *), void *data)
 797 {
 798         rfbi_transfer_area(dssdev, w, h, callback, data);
 799         return 0;
 800 }
 801 EXPORT_SYMBOL(omap_rfbi_update);
 802
 803 void rfbi_dump_regs(struct seq_file *s)
 804 {
 805 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 806
 807         if (rfbi_runtime_get())
 808                 return;
 809
 810         DUMPREG(RFBI_REVISION);
 811         DUMPREG(RFBI_SYSCONFIG);
 812         DUMPREG(RFBI_SYSSTATUS);
 813         DUMPREG(RFBI_CONTROL);
 814         DUMPREG(RFBI_PIXEL_CNT);
 815         DUMPREG(RFBI_LINE_NUMBER);
 816         DUMPREG(RFBI_CMD);
 817         DUMPREG(RFBI_PARAM);
 818         DUMPREG(RFBI_DATA);
 819         DUMPREG(RFBI_READ);
 820         DUMPREG(RFBI_STATUS);
 821
 822         DUMPREG(RFBI_CONFIG(0));
 823         DUMPREG(RFBI_ONOFF_TIME(0));
 824         DUMPREG(RFBI_CYCLE_TIME(0));
 825         DUMPREG(RFBI_DATA_CYCLE1(0));
 826         DUMPREG(RFBI_DATA_CYCLE2(0));
 827         DUMPREG(RFBI_DATA_CYCLE3(0));
 828
 829         DUMPREG(RFBI_CONFIG(1));
 830         DUMPREG(RFBI_ONOFF_TIME(1));
 831         DUMPREG(RFBI_CYCLE_TIME(1));
 832         DUMPREG(RFBI_DATA_CYCLE1(1));
 833         DUMPREG(RFBI_DATA_CYCLE2(1));
 834         DUMPREG(RFBI_DATA_CYCLE3(1));
 835
 836         DUMPREG(RFBI_VSYNC_WIDTH);
 837         DUMPREG(RFBI_HSYNC_WIDTH);
 838
 839         rfbi_runtime_put();
 840 #undef DUMPREG
 841 }
 842
 843 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 844 {
 845         int r;
 846
 847         if (dssdev->manager == NULL) {
 848                 DSSERR("failed to enable display: no manager\n");
 849                 return -ENODEV;
 850         }
 851
 852         r = rfbi_runtime_get();
 853         if (r)
 854                 return r;
 855
 856         r = omap_dss_start_device(dssdev);
 857         if (r) {
 858                 DSSERR("failed to start device\n");
 859                 goto err0;
 860         }
 861
 862         r = omap_dispc_register_isr(framedone_callback, NULL,
 863                         DISPC_IRQ_FRAMEDONE);
 864         if (r) {
 865                 DSSERR("can't get FRAMEDONE irq\n");
 866                 goto err1;
 867         }
 868
 869         dispc_mgr_set_lcd_display_type(dssdev->manager->id,
 870                         OMAP_DSS_LCD_DISPLAY_TFT);
 871
 872         dispc_mgr_set_io_pad_mode(DSS_IO_PAD_MODE_RFBI);
 873         dispc_mgr_enable_stallmode(dssdev->manager->id, true);
 874
 875         dispc_mgr_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
 876
 877         rfbi_configure(dssdev->phy.rfbi.channel,
 878                                dssdev->ctrl.pixel_size,
 879                                dssdev->phy.rfbi.data_lines);
 880
 881         rfbi_set_timings(dssdev->phy.rfbi.channel,
 882                          &dssdev->ctrl.rfbi_timings);
 883
 884
 885         return 0;
 886 err1:
 887         omap_dss_stop_device(dssdev);
 888 err0:
 889         rfbi_runtime_put();
 890         return r;
 891 }
 892 EXPORT_SYMBOL(omapdss_rfbi_display_enable);
 893
 894 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
 895 {
 896         omap_dispc_unregister_isr(framedone_callback, NULL,
 897                         DISPC_IRQ_FRAMEDONE);
 898         omap_dss_stop_device(dssdev);
 899
 900         rfbi_runtime_put();
 901 }
 902 EXPORT_SYMBOL(omapdss_rfbi_display_disable);
 903
 904 int rfbi_init_display(struct omap_dss_device *dssdev)
 905 {
 906         rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 907         dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
 908         return 0;
 909 }
 910
 911 /* RFBI HW IP initialisation */
 912 static int omap_rfbihw_probe(struct platform_device *pdev)
 913 {
 914         u32 rev;
 915         struct resource *rfbi_mem;
 916         struct clk *clk;
 917         int r;
 918
 919         rfbi.pdev = pdev;
 920
 921         sema_init(&rfbi.bus_lock, 1);
 922
 923         rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
 924         if (!rfbi_mem) {
 925                 DSSERR("can't get IORESOURCE_MEM RFBI\n");
 926                 r = -EINVAL;
 927                 goto err_ioremap;
 928         }
 929         rfbi.base = ioremap(rfbi_mem->start, resource_size(rfbi_mem));
 930         if (!rfbi.base) {
 931                 DSSERR("can't ioremap RFBI\n");
 932                 r = -ENOMEM;
 933                 goto err_ioremap;
 934         }
 935
 936         pm_runtime_enable(&pdev->dev);
 937
 938         r = rfbi_runtime_get();
 939         if (r)
 940                 goto err_get_rfbi;
 941
 942         msleep(10);
 943
 944         clk = clk_get(&pdev->dev, "ick");
 945         if (IS_ERR(clk)) {
 946                 DSSERR("can't get ick\n");
 947                 r = PTR_ERR(clk);
 948                 goto err_get_ick;
 949         }
 950
 951         rfbi.l4_khz = clk_get_rate(clk) / 1000;
 952
 953         clk_put(clk);
 954
 955         rev = rfbi_read_reg(RFBI_REVISION);
 956         dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
 957                FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
 958
 959         rfbi_runtime_put();
 960
 961         return 0;
 962
 963 err_get_ick:
 964         rfbi_runtime_put();
 965 err_get_rfbi:
 966         pm_runtime_disable(&pdev->dev);
 967         iounmap(rfbi.base);
 968 err_ioremap:
 969         return r;
 970 }
 971
 972 static int omap_rfbihw_remove(struct platform_device *pdev)
 973 {
 974         pm_runtime_disable(&pdev->dev);
 975         iounmap(rfbi.base);
 976         return 0;
 977 }
 978
 979 static int rfbi_runtime_suspend(struct device *dev)
 980 {
 981         dispc_runtime_put();
 982         dss_runtime_put();
 983
 984         return 0;
 985 }
 986
 987 static int rfbi_runtime_resume(struct device *dev)
 988 {
 989         int r;
 990
 991         r = dss_runtime_get();
 992         if (r < 0)
 993                 goto err_get_dss;
 994
 995         r = dispc_runtime_get();
 996         if (r < 0)
 997                 goto err_get_dispc;
 998
 999         return 0;
1000
1001 err_get_dispc:
1002         dss_runtime_put();
1003 err_get_dss:
1004         return r;
1005 }
1006
1007 static const struct dev_pm_ops rfbi_pm_ops = {
1008         .runtime_suspend = rfbi_runtime_suspend,
1009         .runtime_resume = rfbi_runtime_resume,
1010 };
1011
1012 static struct platform_driver omap_rfbihw_driver = {
1013         .probe          = omap_rfbihw_probe,
1014         .remove         = omap_rfbihw_remove,
1015         .driver         = {
1016                 .name   = "omapdss_rfbi",
1017                 .owner  = THIS_MODULE,
1018                 .pm     = &rfbi_pm_ops,
1019         },
1020 };
1021
1022 int rfbi_init_platform_driver(void)
1023 {
1024         return platform_driver_register(&omap_rfbihw_driver);
1025 }
1026
1027 void rfbi_uninit_platform_driver(void)
1028 {
1029         return platform_driver_unregister(&omap_rfbihw_driver);
1030 }