linux/drivers/video/fbdev/omap2/omapfb/dss/rfbi.c
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   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#include <linux/component.h>
  40
  41#include <video/omapfb_dss.h>
  42#include "dss.h"
  43
  44struct rfbi_reg { u16 idx; };
  45
  46#define RFBI_REG(idx)           ((const struct rfbi_reg) { idx })
  47
  48#define RFBI_REVISION           RFBI_REG(0x0000)
  49#define RFBI_SYSCONFIG          RFBI_REG(0x0010)
  50#define RFBI_SYSSTATUS          RFBI_REG(0x0014)
  51#define RFBI_CONTROL            RFBI_REG(0x0040)
  52#define RFBI_PIXEL_CNT          RFBI_REG(0x0044)
  53#define RFBI_LINE_NUMBER        RFBI_REG(0x0048)
  54#define RFBI_CMD                RFBI_REG(0x004c)
  55#define RFBI_PARAM              RFBI_REG(0x0050)
  56#define RFBI_DATA               RFBI_REG(0x0054)
  57#define RFBI_READ               RFBI_REG(0x0058)
  58#define RFBI_STATUS             RFBI_REG(0x005c)
  59
  60#define RFBI_CONFIG(n)          RFBI_REG(0x0060 + (n)*0x18)
  61#define RFBI_ONOFF_TIME(n)      RFBI_REG(0x0064 + (n)*0x18)
  62#define RFBI_CYCLE_TIME(n)      RFBI_REG(0x0068 + (n)*0x18)
  63#define RFBI_DATA_CYCLE1(n)     RFBI_REG(0x006c + (n)*0x18)
  64#define RFBI_DATA_CYCLE2(n)     RFBI_REG(0x0070 + (n)*0x18)
  65#define RFBI_DATA_CYCLE3(n)     RFBI_REG(0x0074 + (n)*0x18)
  66
  67#define RFBI_VSYNC_WIDTH        RFBI_REG(0x0090)
  68#define RFBI_HSYNC_WIDTH        RFBI_REG(0x0094)
  69
  70#define REG_FLD_MOD(idx, val, start, end) \
  71        rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end))
  72
  73enum omap_rfbi_cycleformat {
  74        OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0,
  75        OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1,
  76        OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2,
  77        OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3,
  78};
  79
  80enum omap_rfbi_datatype {
  81        OMAP_DSS_RFBI_DATATYPE_12 = 0,
  82        OMAP_DSS_RFBI_DATATYPE_16 = 1,
  83        OMAP_DSS_RFBI_DATATYPE_18 = 2,
  84        OMAP_DSS_RFBI_DATATYPE_24 = 3,
  85};
  86
  87enum omap_rfbi_parallelmode {
  88        OMAP_DSS_RFBI_PARALLELMODE_8 = 0,
  89        OMAP_DSS_RFBI_PARALLELMODE_9 = 1,
  90        OMAP_DSS_RFBI_PARALLELMODE_12 = 2,
  91        OMAP_DSS_RFBI_PARALLELMODE_16 = 3,
  92};
  93
  94static int rfbi_convert_timings(struct rfbi_timings *t);
  95static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
  96
  97static struct {
  98        struct platform_device *pdev;
  99        void __iomem    *base;
 100
 101        unsigned long   l4_khz;
 102
 103        enum omap_rfbi_datatype datatype;
 104        enum omap_rfbi_parallelmode parallelmode;
 105
 106        enum omap_rfbi_te_mode te_mode;
 107        int te_enabled;
 108
 109        void (*framedone_callback)(void *data);
 110        void *framedone_callback_data;
 111
 112        struct omap_dss_device *dssdev[2];
 113
 114        struct semaphore bus_lock;
 115
 116        struct omap_video_timings timings;
 117        int pixel_size;
 118        int data_lines;
 119        struct rfbi_timings intf_timings;
 120
 121        struct omap_dss_device output;
 122} rfbi;
 123
 124static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
 125{
 126        __raw_writel(val, rfbi.base + idx.idx);
 127}
 128
 129static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
 130{
 131        return __raw_readl(rfbi.base + idx.idx);
 132}
 133
 134static int rfbi_runtime_get(void)
 135{
 136        int r;
 137
 138        DSSDBG("rfbi_runtime_get\n");
 139
 140        r = pm_runtime_get_sync(&rfbi.pdev->dev);
 141        WARN_ON(r < 0);
 142        return r < 0 ? r : 0;
 143}
 144
 145static void rfbi_runtime_put(void)
 146{
 147        int r;
 148
 149        DSSDBG("rfbi_runtime_put\n");
 150
 151        r = pm_runtime_put_sync(&rfbi.pdev->dev);
 152        WARN_ON(r < 0 && r != -ENOSYS);
 153}
 154
 155static void rfbi_bus_lock(void)
 156{
 157        down(&rfbi.bus_lock);
 158}
 159
 160static void rfbi_bus_unlock(void)
 161{
 162        up(&rfbi.bus_lock);
 163}
 164
 165static void rfbi_write_command(const void *buf, u32 len)
 166{
 167        switch (rfbi.parallelmode) {
 168        case OMAP_DSS_RFBI_PARALLELMODE_8:
 169        {
 170                const u8 *b = buf;
 171                for (; len; len--)
 172                        rfbi_write_reg(RFBI_CMD, *b++);
 173                break;
 174        }
 175
 176        case OMAP_DSS_RFBI_PARALLELMODE_16:
 177        {
 178                const u16 *w = buf;
 179                BUG_ON(len & 1);
 180                for (; len; len -= 2)
 181                        rfbi_write_reg(RFBI_CMD, *w++);
 182                break;
 183        }
 184
 185        case OMAP_DSS_RFBI_PARALLELMODE_9:
 186        case OMAP_DSS_RFBI_PARALLELMODE_12:
 187        default:
 188                BUG();
 189        }
 190}
 191
 192static void rfbi_read_data(void *buf, u32 len)
 193{
 194        switch (rfbi.parallelmode) {
 195        case OMAP_DSS_RFBI_PARALLELMODE_8:
 196        {
 197                u8 *b = buf;
 198                for (; len; len--) {
 199                        rfbi_write_reg(RFBI_READ, 0);
 200                        *b++ = rfbi_read_reg(RFBI_READ);
 201                }
 202                break;
 203        }
 204
 205        case OMAP_DSS_RFBI_PARALLELMODE_16:
 206        {
 207                u16 *w = buf;
 208                BUG_ON(len & ~1);
 209                for (; len; len -= 2) {
 210                        rfbi_write_reg(RFBI_READ, 0);
 211                        *w++ = rfbi_read_reg(RFBI_READ);
 212                }
 213                break;
 214        }
 215
 216        case OMAP_DSS_RFBI_PARALLELMODE_9:
 217        case OMAP_DSS_RFBI_PARALLELMODE_12:
 218        default:
 219                BUG();
 220        }
 221}
 222
 223static void rfbi_write_data(const void *buf, u32 len)
 224{
 225        switch (rfbi.parallelmode) {
 226        case OMAP_DSS_RFBI_PARALLELMODE_8:
 227        {
 228                const u8 *b = buf;
 229                for (; len; len--)
 230                        rfbi_write_reg(RFBI_PARAM, *b++);
 231                break;
 232        }
 233
 234        case OMAP_DSS_RFBI_PARALLELMODE_16:
 235        {
 236                const u16 *w = buf;
 237                BUG_ON(len & 1);
 238                for (; len; len -= 2)
 239                        rfbi_write_reg(RFBI_PARAM, *w++);
 240                break;
 241        }
 242
 243        case OMAP_DSS_RFBI_PARALLELMODE_9:
 244        case OMAP_DSS_RFBI_PARALLELMODE_12:
 245        default:
 246                BUG();
 247
 248        }
 249}
 250
 251static void rfbi_write_pixels(const void __iomem *buf, int scr_width,
 252                u16 x, u16 y,
 253                u16 w, u16 h)
 254{
 255        int start_offset = scr_width * y + x;
 256        int horiz_offset = scr_width - w;
 257        int i;
 258
 259        if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 260           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 261                const u16 __iomem *pd = buf;
 262                pd += start_offset;
 263
 264                for (; h; --h) {
 265                        for (i = 0; i < w; ++i) {
 266                                const u8 __iomem *b = (const u8 __iomem *)pd;
 267                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 268                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 269                                ++pd;
 270                        }
 271                        pd += horiz_offset;
 272                }
 273        } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
 274           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 275                const u32 __iomem *pd = buf;
 276                pd += start_offset;
 277
 278                for (; h; --h) {
 279                        for (i = 0; i < w; ++i) {
 280                                const u8 __iomem *b = (const u8 __iomem *)pd;
 281                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
 282                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 283                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 284                                ++pd;
 285                        }
 286                        pd += horiz_offset;
 287                }
 288        } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 289           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
 290                const u16 __iomem *pd = buf;
 291                pd += start_offset;
 292
 293                for (; h; --h) {
 294                        for (i = 0; i < w; ++i) {
 295                                rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
 296                                ++pd;
 297                        }
 298                        pd += horiz_offset;
 299                }
 300        } else {
 301                BUG();
 302        }
 303}
 304
 305static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 306                void (*callback)(void *data), void *data)
 307{
 308        u32 l;
 309        int r;
 310        struct omap_overlay_manager *mgr = rfbi.output.manager;
 311        u16 width = rfbi.timings.x_res;
 312        u16 height = rfbi.timings.y_res;
 313
 314        /*BUG_ON(callback == 0);*/
 315        BUG_ON(rfbi.framedone_callback != NULL);
 316
 317        DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 318
 319        dss_mgr_set_timings(mgr, &rfbi.timings);
 320
 321        r = dss_mgr_enable(mgr);
 322        if (r)
 323                return r;
 324
 325        rfbi.framedone_callback = callback;
 326        rfbi.framedone_callback_data = data;
 327
 328        rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 329
 330        l = rfbi_read_reg(RFBI_CONTROL);
 331        l = FLD_MOD(l, 1, 0, 0); /* enable */
 332        if (!rfbi.te_enabled)
 333                l = FLD_MOD(l, 1, 4, 4); /* ITE */
 334
 335        rfbi_write_reg(RFBI_CONTROL, l);
 336
 337        return 0;
 338}
 339
 340static void framedone_callback(void *data)
 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 */
 356static 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
 380static void rfbi_print_timings(void) {}
 381#endif
 382
 383
 384
 385
 386static u32 extif_clk_period;
 387
 388static 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
 394static 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
 423static 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
 442static 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
 464static 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
 477static 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
 483static 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 */
 572static int 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
 612/* xxx FIX module selection missing */
 613static int rfbi_enable_te(bool enable, unsigned line)
 614{
 615        u32 l;
 616
 617        DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 618        if (line > (1 << 11) - 1)
 619                return -EINVAL;
 620
 621        l = rfbi_read_reg(RFBI_CONFIG(0));
 622        l &= ~(0x3 << 2);
 623        if (enable) {
 624                rfbi.te_enabled = 1;
 625                l |= rfbi.te_mode << 2;
 626        } else
 627                rfbi.te_enabled = 0;
 628        rfbi_write_reg(RFBI_CONFIG(0), l);
 629        rfbi_write_reg(RFBI_LINE_NUMBER, line);
 630
 631        return 0;
 632}
 633
 634static int rfbi_configure_bus(int rfbi_module, int bpp, int lines)
 635{
 636        u32 l;
 637        int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 638        enum omap_rfbi_cycleformat cycleformat;
 639        enum omap_rfbi_datatype datatype;
 640        enum omap_rfbi_parallelmode parallelmode;
 641
 642        switch (bpp) {
 643        case 12:
 644                datatype = OMAP_DSS_RFBI_DATATYPE_12;
 645                break;
 646        case 16:
 647                datatype = OMAP_DSS_RFBI_DATATYPE_16;
 648                break;
 649        case 18:
 650                datatype = OMAP_DSS_RFBI_DATATYPE_18;
 651                break;
 652        case 24:
 653                datatype = OMAP_DSS_RFBI_DATATYPE_24;
 654                break;
 655        default:
 656                BUG();
 657                return 1;
 658        }
 659        rfbi.datatype = datatype;
 660
 661        switch (lines) {
 662        case 8:
 663                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 664                break;
 665        case 9:
 666                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 667                break;
 668        case 12:
 669                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 670                break;
 671        case 16:
 672                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 673                break;
 674        default:
 675                BUG();
 676                return 1;
 677        }
 678        rfbi.parallelmode = parallelmode;
 679
 680        if ((bpp % lines) == 0) {
 681                switch (bpp / lines) {
 682                case 1:
 683                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 684                        break;
 685                case 2:
 686                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 687                        break;
 688                case 3:
 689                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 690                        break;
 691                default:
 692                        BUG();
 693                        return 1;
 694                }
 695        } else if ((2 * bpp % lines) == 0) {
 696                if ((2 * bpp / lines) == 3)
 697                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 698                else {
 699                        BUG();
 700                        return 1;
 701                }
 702        } else {
 703                BUG();
 704                return 1;
 705        }
 706
 707        switch (cycleformat) {
 708        case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 709                cycle1 = lines;
 710                break;
 711
 712        case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 713                cycle1 = lines;
 714                cycle2 = lines;
 715                break;
 716
 717        case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 718                cycle1 = lines;
 719                cycle2 = lines;
 720                cycle3 = lines;
 721                break;
 722
 723        case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 724                cycle1 = lines;
 725                cycle2 = (lines / 2) | ((lines / 2) << 16);
 726                cycle3 = (lines << 16);
 727                break;
 728        }
 729
 730        REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 731
 732        l = 0;
 733        l |= FLD_VAL(parallelmode, 1, 0);
 734        l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 735        l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 736        l |= FLD_VAL(datatype, 6, 5);
 737        /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 738        l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 739        l |= FLD_VAL(cycleformat, 10, 9);
 740        l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 741        l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 742        l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 743        l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 744        l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 745        l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 746        l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 747        rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 748
 749        rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 750        rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 751        rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 752
 753
 754        l = rfbi_read_reg(RFBI_CONTROL);
 755        l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 756        l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 757        rfbi_write_reg(RFBI_CONTROL, l);
 758
 759
 760        DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 761               bpp, lines, cycle1, cycle2, cycle3);
 762
 763        return 0;
 764}
 765
 766static int rfbi_configure(struct omap_dss_device *dssdev)
 767{
 768        return rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 769                        rfbi.data_lines);
 770}
 771
 772static int rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
 773                void *data)
 774{
 775        return rfbi_transfer_area(dssdev, callback, data);
 776}
 777
 778static void rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
 779{
 780        rfbi.timings.x_res = w;
 781        rfbi.timings.y_res = h;
 782}
 783
 784static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
 785{
 786        rfbi.pixel_size = pixel_size;
 787}
 788
 789static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
 790{
 791        rfbi.data_lines = data_lines;
 792}
 793
 794static void rfbi_set_interface_timings(struct omap_dss_device *dssdev,
 795                struct rfbi_timings *timings)
 796{
 797        rfbi.intf_timings = *timings;
 798}
 799
 800static void rfbi_dump_regs(struct seq_file *s)
 801{
 802#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 803
 804        if (rfbi_runtime_get())
 805                return;
 806
 807        DUMPREG(RFBI_REVISION);
 808        DUMPREG(RFBI_SYSCONFIG);
 809        DUMPREG(RFBI_SYSSTATUS);
 810        DUMPREG(RFBI_CONTROL);
 811        DUMPREG(RFBI_PIXEL_CNT);
 812        DUMPREG(RFBI_LINE_NUMBER);
 813        DUMPREG(RFBI_CMD);
 814        DUMPREG(RFBI_PARAM);
 815        DUMPREG(RFBI_DATA);
 816        DUMPREG(RFBI_READ);
 817        DUMPREG(RFBI_STATUS);
 818
 819        DUMPREG(RFBI_CONFIG(0));
 820        DUMPREG(RFBI_ONOFF_TIME(0));
 821        DUMPREG(RFBI_CYCLE_TIME(0));
 822        DUMPREG(RFBI_DATA_CYCLE1(0));
 823        DUMPREG(RFBI_DATA_CYCLE2(0));
 824        DUMPREG(RFBI_DATA_CYCLE3(0));
 825
 826        DUMPREG(RFBI_CONFIG(1));
 827        DUMPREG(RFBI_ONOFF_TIME(1));
 828        DUMPREG(RFBI_CYCLE_TIME(1));
 829        DUMPREG(RFBI_DATA_CYCLE1(1));
 830        DUMPREG(RFBI_DATA_CYCLE2(1));
 831        DUMPREG(RFBI_DATA_CYCLE3(1));
 832
 833        DUMPREG(RFBI_VSYNC_WIDTH);
 834        DUMPREG(RFBI_HSYNC_WIDTH);
 835
 836        rfbi_runtime_put();
 837#undef DUMPREG
 838}
 839
 840static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 841{
 842        struct omap_overlay_manager *mgr = rfbi.output.manager;
 843        struct dss_lcd_mgr_config mgr_config;
 844
 845        mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
 846
 847        mgr_config.stallmode = true;
 848        /* Do we need fifohandcheck for RFBI? */
 849        mgr_config.fifohandcheck = false;
 850
 851        mgr_config.video_port_width = rfbi.pixel_size;
 852        mgr_config.lcden_sig_polarity = 0;
 853
 854        dss_mgr_set_lcd_config(mgr, &mgr_config);
 855
 856        /*
 857         * Set rfbi.timings with default values, the x_res and y_res fields
 858         * are expected to be already configured by the panel driver via
 859         * omapdss_rfbi_set_size()
 860         */
 861        rfbi.timings.hsw = 1;
 862        rfbi.timings.hfp = 1;
 863        rfbi.timings.hbp = 1;
 864        rfbi.timings.vsw = 1;
 865        rfbi.timings.vfp = 0;
 866        rfbi.timings.vbp = 0;
 867
 868        rfbi.timings.interlace = false;
 869        rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 870        rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 871        rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 872        rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
 873        rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
 874
 875        dss_mgr_set_timings(mgr, &rfbi.timings);
 876}
 877
 878static int rfbi_display_enable(struct omap_dss_device *dssdev)
 879{
 880        struct omap_dss_device *out = &rfbi.output;
 881        int r;
 882
 883        if (out->manager == NULL) {
 884                DSSERR("failed to enable display: no output/manager\n");
 885                return -ENODEV;
 886        }
 887
 888        r = rfbi_runtime_get();
 889        if (r)
 890                return r;
 891
 892        r = dss_mgr_register_framedone_handler(out->manager,
 893                        framedone_callback, NULL);
 894        if (r) {
 895                DSSERR("can't get FRAMEDONE irq\n");
 896                goto err1;
 897        }
 898
 899        rfbi_config_lcd_manager(dssdev);
 900
 901        rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 902                        rfbi.data_lines);
 903
 904        rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings);
 905
 906        return 0;
 907err1:
 908        rfbi_runtime_put();
 909        return r;
 910}
 911
 912static void rfbi_display_disable(struct omap_dss_device *dssdev)
 913{
 914        struct omap_dss_device *out = &rfbi.output;
 915
 916        dss_mgr_unregister_framedone_handler(out->manager,
 917                        framedone_callback, NULL);
 918
 919        rfbi_runtime_put();
 920}
 921
 922static int rfbi_init_display(struct omap_dss_device *dssdev)
 923{
 924        rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 925        return 0;
 926}
 927
 928static void rfbi_init_output(struct platform_device *pdev)
 929{
 930        struct omap_dss_device *out = &rfbi.output;
 931
 932        out->dev = &pdev->dev;
 933        out->id = OMAP_DSS_OUTPUT_DBI;
 934        out->output_type = OMAP_DISPLAY_TYPE_DBI;
 935        out->name = "rfbi.0";
 936        out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 937        out->owner = THIS_MODULE;
 938
 939        omapdss_register_output(out);
 940}
 941
 942static void rfbi_uninit_output(struct platform_device *pdev)
 943{
 944        struct omap_dss_device *out = &rfbi.output;
 945
 946        omapdss_unregister_output(out);
 947}
 948
 949/* RFBI HW IP initialisation */
 950static int rfbi_bind(struct device *dev, struct device *master, void *data)
 951{
 952        struct platform_device *pdev = to_platform_device(dev);
 953        u32 rev;
 954        struct resource *rfbi_mem;
 955        struct clk *clk;
 956        int r;
 957
 958        rfbi.pdev = pdev;
 959
 960        sema_init(&rfbi.bus_lock, 1);
 961
 962        rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
 963        if (!rfbi_mem) {
 964                DSSERR("can't get IORESOURCE_MEM RFBI\n");
 965                return -EINVAL;
 966        }
 967
 968        rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
 969                                 resource_size(rfbi_mem));
 970        if (!rfbi.base) {
 971                DSSERR("can't ioremap RFBI\n");
 972                return -ENOMEM;
 973        }
 974
 975        clk = clk_get(&pdev->dev, "ick");
 976        if (IS_ERR(clk)) {
 977                DSSERR("can't get ick\n");
 978                return PTR_ERR(clk);
 979        }
 980
 981        rfbi.l4_khz = clk_get_rate(clk) / 1000;
 982
 983        clk_put(clk);
 984
 985        pm_runtime_enable(&pdev->dev);
 986
 987        r = rfbi_runtime_get();
 988        if (r)
 989                goto err_runtime_get;
 990
 991        msleep(10);
 992
 993        rev = rfbi_read_reg(RFBI_REVISION);
 994        dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
 995               FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
 996
 997        rfbi_runtime_put();
 998
 999        dss_debugfs_create_file("rfbi", rfbi_dump_regs);
1000
1001        rfbi_init_output(pdev);
1002
1003        return 0;
1004
1005err_runtime_get:
1006        pm_runtime_disable(&pdev->dev);
1007        return r;
1008}
1009
1010static void rfbi_unbind(struct device *dev, struct device *master, void *data)
1011{
1012        struct platform_device *pdev = to_platform_device(dev);
1013
1014        rfbi_uninit_output(pdev);
1015
1016        pm_runtime_disable(&pdev->dev);
1017
1018        return 0;
1019}
1020
1021static const struct component_ops rfbi_component_ops = {
1022        .bind   = rfbi_bind,
1023        .unbind = rfbi_unbind,
1024};
1025
1026static int rfbi_probe(struct platform_device *pdev)
1027{
1028        return component_add(&pdev->dev, &rfbi_component_ops);
1029}
1030
1031static int rfbi_remove(struct platform_device *pdev)
1032{
1033        component_del(&pdev->dev, &rfbi_component_ops);
1034        return 0;
1035}
1036
1037static int rfbi_runtime_suspend(struct device *dev)
1038{
1039        dispc_runtime_put();
1040
1041        return 0;
1042}
1043
1044static int rfbi_runtime_resume(struct device *dev)
1045{
1046        int r;
1047
1048        r = dispc_runtime_get();
1049        if (r < 0)
1050                return r;
1051
1052        return 0;
1053}
1054
1055static const struct dev_pm_ops rfbi_pm_ops = {
1056        .runtime_suspend = rfbi_runtime_suspend,
1057        .runtime_resume = rfbi_runtime_resume,
1058};
1059
1060static struct platform_driver omap_rfbihw_driver = {
1061        .probe          = rfbi_probe,
1062        .remove         = rfbi_remove,
1063        .driver         = {
1064                .name   = "omapdss_rfbi",
1065                .pm     = &rfbi_pm_ops,
1066                .suppress_bind_attrs = true,
1067        },
1068};
1069
1070int __init rfbi_init_platform_driver(void)
1071{
1072        return platform_driver_register(&omap_rfbihw_driver);
1073}
1074
1075void rfbi_uninit_platform_driver(void)
1076{
1077        platform_driver_unregister(&omap_rfbihw_driver);
1078}
1079