linux/drivers/video/fbdev/omap2/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
  40#include <video/omapdss.h>
  41#include "dss.h"
  42
  43struct 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
  72enum 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
  79enum 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
  86enum 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
  93static int rfbi_convert_timings(struct rfbi_timings *t);
  94static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
  95
  96static struct {
  97        struct platform_device *pdev;
  98        void __iomem    *base;
  99
 100        unsigned long   l4_khz;
 101
 102        enum omap_rfbi_datatype datatype;
 103        enum omap_rfbi_parallelmode parallelmode;
 104
 105        enum omap_rfbi_te_mode te_mode;
 106        int te_enabled;
 107
 108        void (*framedone_callback)(void *data);
 109        void *framedone_callback_data;
 110
 111        struct omap_dss_device *dssdev[2];
 112
 113        struct semaphore bus_lock;
 114
 115        struct omap_video_timings timings;
 116        int pixel_size;
 117        int data_lines;
 118        struct rfbi_timings intf_timings;
 119
 120        struct omap_dss_device output;
 121} rfbi;
 122
 123static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
 124{
 125        __raw_writel(val, rfbi.base + idx.idx);
 126}
 127
 128static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
 129{
 130        return __raw_readl(rfbi.base + idx.idx);
 131}
 132
 133static int rfbi_runtime_get(void)
 134{
 135        int r;
 136
 137        DSSDBG("rfbi_runtime_get\n");
 138
 139        r = pm_runtime_get_sync(&rfbi.pdev->dev);
 140        WARN_ON(r < 0);
 141        return r < 0 ? r : 0;
 142}
 143
 144static void rfbi_runtime_put(void)
 145{
 146        int r;
 147
 148        DSSDBG("rfbi_runtime_put\n");
 149
 150        r = pm_runtime_put_sync(&rfbi.pdev->dev);
 151        WARN_ON(r < 0 && r != -ENOSYS);
 152}
 153
 154static void rfbi_bus_lock(void)
 155{
 156        down(&rfbi.bus_lock);
 157}
 158
 159static void rfbi_bus_unlock(void)
 160{
 161        up(&rfbi.bus_lock);
 162}
 163
 164static void rfbi_write_command(const void *buf, u32 len)
 165{
 166        switch (rfbi.parallelmode) {
 167        case OMAP_DSS_RFBI_PARALLELMODE_8:
 168        {
 169                const u8 *b = buf;
 170                for (; len; len--)
 171                        rfbi_write_reg(RFBI_CMD, *b++);
 172                break;
 173        }
 174
 175        case OMAP_DSS_RFBI_PARALLELMODE_16:
 176        {
 177                const u16 *w = buf;
 178                BUG_ON(len & 1);
 179                for (; len; len -= 2)
 180                        rfbi_write_reg(RFBI_CMD, *w++);
 181                break;
 182        }
 183
 184        case OMAP_DSS_RFBI_PARALLELMODE_9:
 185        case OMAP_DSS_RFBI_PARALLELMODE_12:
 186        default:
 187                BUG();
 188        }
 189}
 190
 191static void rfbi_read_data(void *buf, u32 len)
 192{
 193        switch (rfbi.parallelmode) {
 194        case OMAP_DSS_RFBI_PARALLELMODE_8:
 195        {
 196                u8 *b = buf;
 197                for (; len; len--) {
 198                        rfbi_write_reg(RFBI_READ, 0);
 199                        *b++ = rfbi_read_reg(RFBI_READ);
 200                }
 201                break;
 202        }
 203
 204        case OMAP_DSS_RFBI_PARALLELMODE_16:
 205        {
 206                u16 *w = buf;
 207                BUG_ON(len & ~1);
 208                for (; len; len -= 2) {
 209                        rfbi_write_reg(RFBI_READ, 0);
 210                        *w++ = rfbi_read_reg(RFBI_READ);
 211                }
 212                break;
 213        }
 214
 215        case OMAP_DSS_RFBI_PARALLELMODE_9:
 216        case OMAP_DSS_RFBI_PARALLELMODE_12:
 217        default:
 218                BUG();
 219        }
 220}
 221
 222static void rfbi_write_data(const void *buf, u32 len)
 223{
 224        switch (rfbi.parallelmode) {
 225        case OMAP_DSS_RFBI_PARALLELMODE_8:
 226        {
 227                const u8 *b = buf;
 228                for (; len; len--)
 229                        rfbi_write_reg(RFBI_PARAM, *b++);
 230                break;
 231        }
 232
 233        case OMAP_DSS_RFBI_PARALLELMODE_16:
 234        {
 235                const u16 *w = buf;
 236                BUG_ON(len & 1);
 237                for (; len; len -= 2)
 238                        rfbi_write_reg(RFBI_PARAM, *w++);
 239                break;
 240        }
 241
 242        case OMAP_DSS_RFBI_PARALLELMODE_9:
 243        case OMAP_DSS_RFBI_PARALLELMODE_12:
 244        default:
 245                BUG();
 246
 247        }
 248}
 249
 250static void rfbi_write_pixels(const void __iomem *buf, int scr_width,
 251                u16 x, u16 y,
 252                u16 w, u16 h)
 253{
 254        int start_offset = scr_width * y + x;
 255        int horiz_offset = scr_width - w;
 256        int i;
 257
 258        if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 259           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 260                const u16 __iomem *pd = buf;
 261                pd += start_offset;
 262
 263                for (; h; --h) {
 264                        for (i = 0; i < w; ++i) {
 265                                const u8 __iomem *b = (const u8 __iomem *)pd;
 266                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 267                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 268                                ++pd;
 269                        }
 270                        pd += horiz_offset;
 271                }
 272        } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
 273           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
 274                const u32 __iomem *pd = buf;
 275                pd += start_offset;
 276
 277                for (; h; --h) {
 278                        for (i = 0; i < w; ++i) {
 279                                const u8 __iomem *b = (const u8 __iomem *)pd;
 280                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
 281                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
 282                                rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
 283                                ++pd;
 284                        }
 285                        pd += horiz_offset;
 286                }
 287        } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
 288           rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
 289                const u16 __iomem *pd = buf;
 290                pd += start_offset;
 291
 292                for (; h; --h) {
 293                        for (i = 0; i < w; ++i) {
 294                                rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
 295                                ++pd;
 296                        }
 297                        pd += horiz_offset;
 298                }
 299        } else {
 300                BUG();
 301        }
 302}
 303
 304static int rfbi_transfer_area(struct omap_dss_device *dssdev,
 305                void (*callback)(void *data), void *data)
 306{
 307        u32 l;
 308        int r;
 309        struct omap_overlay_manager *mgr = rfbi.output.manager;
 310        u16 width = rfbi.timings.x_res;
 311        u16 height = rfbi.timings.y_res;
 312
 313        /*BUG_ON(callback == 0);*/
 314        BUG_ON(rfbi.framedone_callback != NULL);
 315
 316        DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
 317
 318        dss_mgr_set_timings(mgr, &rfbi.timings);
 319
 320        r = dss_mgr_enable(mgr);
 321        if (r)
 322                return r;
 323
 324        rfbi.framedone_callback = callback;
 325        rfbi.framedone_callback_data = data;
 326
 327        rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 328
 329        l = rfbi_read_reg(RFBI_CONTROL);
 330        l = FLD_MOD(l, 1, 0, 0); /* enable */
 331        if (!rfbi.te_enabled)
 332                l = FLD_MOD(l, 1, 4, 4); /* ITE */
 333
 334        rfbi_write_reg(RFBI_CONTROL, l);
 335
 336        return 0;
 337}
 338
 339static void framedone_callback(void *data)
 340{
 341        void (*callback)(void *data);
 342
 343        DSSDBG("FRAMEDONE\n");
 344
 345        REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 346
 347        callback = rfbi.framedone_callback;
 348        rfbi.framedone_callback = NULL;
 349
 350        if (callback != NULL)
 351                callback(rfbi.framedone_callback_data);
 352}
 353
 354#if 1 /* VERBOSE */
 355static void rfbi_print_timings(void)
 356{
 357        u32 l;
 358        u32 time;
 359
 360        l = rfbi_read_reg(RFBI_CONFIG(0));
 361        time = 1000000000 / rfbi.l4_khz;
 362        if (l & (1 << 4))
 363                time *= 2;
 364
 365        DSSDBG("Tick time %u ps\n", time);
 366        l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
 367        DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
 368                "REONTIME %d, REOFFTIME %d\n",
 369                l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
 370                (l >> 20) & 0x0f, (l >> 24) & 0x3f);
 371
 372        l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
 373        DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
 374                "ACCESSTIME %d\n",
 375                (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
 376                (l >> 22) & 0x3f);
 377}
 378#else
 379static void rfbi_print_timings(void) {}
 380#endif
 381
 382
 383
 384
 385static u32 extif_clk_period;
 386
 387static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
 388{
 389        int bus_tick = extif_clk_period * div;
 390        return (ps + bus_tick - 1) / bus_tick * bus_tick;
 391}
 392
 393static int calc_reg_timing(struct rfbi_timings *t, int div)
 394{
 395        t->clk_div = div;
 396
 397        t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
 398
 399        t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
 400        t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
 401        t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
 402
 403        t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
 404        t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
 405        t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
 406
 407        t->access_time = round_to_extif_ticks(t->access_time, div);
 408        t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
 409        t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
 410
 411        DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
 412               t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
 413        DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
 414               t->we_on_time, t->we_off_time, t->re_cycle_time,
 415               t->we_cycle_time);
 416        DSSDBG("[reg]rdaccess %d cspulse %d\n",
 417               t->access_time, t->cs_pulse_width);
 418
 419        return rfbi_convert_timings(t);
 420}
 421
 422static int calc_extif_timings(struct rfbi_timings *t)
 423{
 424        u32 max_clk_div;
 425        int div;
 426
 427        rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
 428        for (div = 1; div <= max_clk_div; div++) {
 429                if (calc_reg_timing(t, div) == 0)
 430                        break;
 431        }
 432
 433        if (div <= max_clk_div)
 434                return 0;
 435
 436        DSSERR("can't setup timings\n");
 437        return -1;
 438}
 439
 440
 441static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 442{
 443        int r;
 444
 445        if (!t->converted) {
 446                r = calc_extif_timings(t);
 447                if (r < 0)
 448                        DSSERR("Failed to calc timings\n");
 449        }
 450
 451        BUG_ON(!t->converted);
 452
 453        rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
 454        rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 455
 456        /* TIMEGRANULARITY */
 457        REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
 458                    (t->tim[2] ? 1 : 0), 4, 4);
 459
 460        rfbi_print_timings();
 461}
 462
 463static int ps_to_rfbi_ticks(int time, int div)
 464{
 465        unsigned long tick_ps;
 466        int ret;
 467
 468        /* Calculate in picosecs to yield more exact results */
 469        tick_ps = 1000000000 / (rfbi.l4_khz) * div;
 470
 471        ret = (time + tick_ps - 1) / tick_ps;
 472
 473        return ret;
 474}
 475
 476static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
 477{
 478        *clk_period = 1000000000 / rfbi.l4_khz;
 479        *max_clk_div = 2;
 480}
 481
 482static int rfbi_convert_timings(struct rfbi_timings *t)
 483{
 484        u32 l;
 485        int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
 486        int actim, recyc, wecyc;
 487        int div = t->clk_div;
 488
 489        if (div <= 0 || div > 2)
 490                return -1;
 491
 492        /* Make sure that after conversion it still holds that:
 493         * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
 494         * csoff > cson, csoff >= max(weoff, reoff), actim > reon
 495         */
 496        weon = ps_to_rfbi_ticks(t->we_on_time, div);
 497        weoff = ps_to_rfbi_ticks(t->we_off_time, div);
 498        if (weoff <= weon)
 499                weoff = weon + 1;
 500        if (weon > 0x0f)
 501                return -1;
 502        if (weoff > 0x3f)
 503                return -1;
 504
 505        reon = ps_to_rfbi_ticks(t->re_on_time, div);
 506        reoff = ps_to_rfbi_ticks(t->re_off_time, div);
 507        if (reoff <= reon)
 508                reoff = reon + 1;
 509        if (reon > 0x0f)
 510                return -1;
 511        if (reoff > 0x3f)
 512                return -1;
 513
 514        cson = ps_to_rfbi_ticks(t->cs_on_time, div);
 515        csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
 516        if (csoff <= cson)
 517                csoff = cson + 1;
 518        if (csoff < max(weoff, reoff))
 519                csoff = max(weoff, reoff);
 520        if (cson > 0x0f)
 521                return -1;
 522        if (csoff > 0x3f)
 523                return -1;
 524
 525        l =  cson;
 526        l |= csoff << 4;
 527        l |= weon  << 10;
 528        l |= weoff << 14;
 529        l |= reon  << 20;
 530        l |= reoff << 24;
 531
 532        t->tim[0] = l;
 533
 534        actim = ps_to_rfbi_ticks(t->access_time, div);
 535        if (actim <= reon)
 536                actim = reon + 1;
 537        if (actim > 0x3f)
 538                return -1;
 539
 540        wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
 541        if (wecyc < weoff)
 542                wecyc = weoff;
 543        if (wecyc > 0x3f)
 544                return -1;
 545
 546        recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
 547        if (recyc < reoff)
 548                recyc = reoff;
 549        if (recyc > 0x3f)
 550                return -1;
 551
 552        cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
 553        if (cs_pulse > 0x3f)
 554                return -1;
 555
 556        l =  wecyc;
 557        l |= recyc    << 6;
 558        l |= cs_pulse << 12;
 559        l |= actim    << 22;
 560
 561        t->tim[1] = l;
 562
 563        t->tim[2] = div - 1;
 564
 565        t->converted = 1;
 566
 567        return 0;
 568}
 569
 570/* xxx FIX module selection missing */
 571static int rfbi_setup_te(enum omap_rfbi_te_mode mode,
 572                             unsigned hs_pulse_time, unsigned vs_pulse_time,
 573                             int hs_pol_inv, int vs_pol_inv, int extif_div)
 574{
 575        int hs, vs;
 576        int min;
 577        u32 l;
 578
 579        hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
 580        vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
 581        if (hs < 2)
 582                return -EDOM;
 583        if (mode == OMAP_DSS_RFBI_TE_MODE_2)
 584                min = 2;
 585        else /* OMAP_DSS_RFBI_TE_MODE_1 */
 586                min = 4;
 587        if (vs < min)
 588                return -EDOM;
 589        if (vs == hs)
 590                return -EINVAL;
 591        rfbi.te_mode = mode;
 592        DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
 593                mode, hs, vs, hs_pol_inv, vs_pol_inv);
 594
 595        rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
 596        rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 597
 598        l = rfbi_read_reg(RFBI_CONFIG(0));
 599        if (hs_pol_inv)
 600                l &= ~(1 << 21);
 601        else
 602                l |= 1 << 21;
 603        if (vs_pol_inv)
 604                l &= ~(1 << 20);
 605        else
 606                l |= 1 << 20;
 607
 608        return 0;
 609}
 610
 611/* xxx FIX module selection missing */
 612static int rfbi_enable_te(bool enable, unsigned line)
 613{
 614        u32 l;
 615
 616        DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
 617        if (line > (1 << 11) - 1)
 618                return -EINVAL;
 619
 620        l = rfbi_read_reg(RFBI_CONFIG(0));
 621        l &= ~(0x3 << 2);
 622        if (enable) {
 623                rfbi.te_enabled = 1;
 624                l |= rfbi.te_mode << 2;
 625        } else
 626                rfbi.te_enabled = 0;
 627        rfbi_write_reg(RFBI_CONFIG(0), l);
 628        rfbi_write_reg(RFBI_LINE_NUMBER, line);
 629
 630        return 0;
 631}
 632
 633static int rfbi_configure_bus(int rfbi_module, int bpp, int lines)
 634{
 635        u32 l;
 636        int cycle1 = 0, cycle2 = 0, cycle3 = 0;
 637        enum omap_rfbi_cycleformat cycleformat;
 638        enum omap_rfbi_datatype datatype;
 639        enum omap_rfbi_parallelmode parallelmode;
 640
 641        switch (bpp) {
 642        case 12:
 643                datatype = OMAP_DSS_RFBI_DATATYPE_12;
 644                break;
 645        case 16:
 646                datatype = OMAP_DSS_RFBI_DATATYPE_16;
 647                break;
 648        case 18:
 649                datatype = OMAP_DSS_RFBI_DATATYPE_18;
 650                break;
 651        case 24:
 652                datatype = OMAP_DSS_RFBI_DATATYPE_24;
 653                break;
 654        default:
 655                BUG();
 656                return 1;
 657        }
 658        rfbi.datatype = datatype;
 659
 660        switch (lines) {
 661        case 8:
 662                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
 663                break;
 664        case 9:
 665                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
 666                break;
 667        case 12:
 668                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
 669                break;
 670        case 16:
 671                parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
 672                break;
 673        default:
 674                BUG();
 675                return 1;
 676        }
 677        rfbi.parallelmode = parallelmode;
 678
 679        if ((bpp % lines) == 0) {
 680                switch (bpp / lines) {
 681                case 1:
 682                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
 683                        break;
 684                case 2:
 685                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
 686                        break;
 687                case 3:
 688                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
 689                        break;
 690                default:
 691                        BUG();
 692                        return 1;
 693                }
 694        } else if ((2 * bpp % lines) == 0) {
 695                if ((2 * bpp / lines) == 3)
 696                        cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
 697                else {
 698                        BUG();
 699                        return 1;
 700                }
 701        } else {
 702                BUG();
 703                return 1;
 704        }
 705
 706        switch (cycleformat) {
 707        case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
 708                cycle1 = lines;
 709                break;
 710
 711        case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
 712                cycle1 = lines;
 713                cycle2 = lines;
 714                break;
 715
 716        case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
 717                cycle1 = lines;
 718                cycle2 = lines;
 719                cycle3 = lines;
 720                break;
 721
 722        case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
 723                cycle1 = lines;
 724                cycle2 = (lines / 2) | ((lines / 2) << 16);
 725                cycle3 = (lines << 16);
 726                break;
 727        }
 728
 729        REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 730
 731        l = 0;
 732        l |= FLD_VAL(parallelmode, 1, 0);
 733        l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
 734        l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
 735        l |= FLD_VAL(datatype, 6, 5);
 736        /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
 737        l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
 738        l |= FLD_VAL(cycleformat, 10, 9);
 739        l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
 740        l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
 741        l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
 742        l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
 743        l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
 744        l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
 745        l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
 746        rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
 747
 748        rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
 749        rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
 750        rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
 751
 752
 753        l = rfbi_read_reg(RFBI_CONTROL);
 754        l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
 755        l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
 756        rfbi_write_reg(RFBI_CONTROL, l);
 757
 758
 759        DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
 760               bpp, lines, cycle1, cycle2, cycle3);
 761
 762        return 0;
 763}
 764
 765static int rfbi_configure(struct omap_dss_device *dssdev)
 766{
 767        return rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 768                        rfbi.data_lines);
 769}
 770
 771static int rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
 772                void *data)
 773{
 774        return rfbi_transfer_area(dssdev, callback, data);
 775}
 776
 777static void rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
 778{
 779        rfbi.timings.x_res = w;
 780        rfbi.timings.y_res = h;
 781}
 782
 783static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
 784{
 785        rfbi.pixel_size = pixel_size;
 786}
 787
 788static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
 789{
 790        rfbi.data_lines = data_lines;
 791}
 792
 793static void rfbi_set_interface_timings(struct omap_dss_device *dssdev,
 794                struct rfbi_timings *timings)
 795{
 796        rfbi.intf_timings = *timings;
 797}
 798
 799static void rfbi_dump_regs(struct seq_file *s)
 800{
 801#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
 802
 803        if (rfbi_runtime_get())
 804                return;
 805
 806        DUMPREG(RFBI_REVISION);
 807        DUMPREG(RFBI_SYSCONFIG);
 808        DUMPREG(RFBI_SYSSTATUS);
 809        DUMPREG(RFBI_CONTROL);
 810        DUMPREG(RFBI_PIXEL_CNT);
 811        DUMPREG(RFBI_LINE_NUMBER);
 812        DUMPREG(RFBI_CMD);
 813        DUMPREG(RFBI_PARAM);
 814        DUMPREG(RFBI_DATA);
 815        DUMPREG(RFBI_READ);
 816        DUMPREG(RFBI_STATUS);
 817
 818        DUMPREG(RFBI_CONFIG(0));
 819        DUMPREG(RFBI_ONOFF_TIME(0));
 820        DUMPREG(RFBI_CYCLE_TIME(0));
 821        DUMPREG(RFBI_DATA_CYCLE1(0));
 822        DUMPREG(RFBI_DATA_CYCLE2(0));
 823        DUMPREG(RFBI_DATA_CYCLE3(0));
 824
 825        DUMPREG(RFBI_CONFIG(1));
 826        DUMPREG(RFBI_ONOFF_TIME(1));
 827        DUMPREG(RFBI_CYCLE_TIME(1));
 828        DUMPREG(RFBI_DATA_CYCLE1(1));
 829        DUMPREG(RFBI_DATA_CYCLE2(1));
 830        DUMPREG(RFBI_DATA_CYCLE3(1));
 831
 832        DUMPREG(RFBI_VSYNC_WIDTH);
 833        DUMPREG(RFBI_HSYNC_WIDTH);
 834
 835        rfbi_runtime_put();
 836#undef DUMPREG
 837}
 838
 839static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 840{
 841        struct omap_overlay_manager *mgr = rfbi.output.manager;
 842        struct dss_lcd_mgr_config mgr_config;
 843
 844        mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
 845
 846        mgr_config.stallmode = true;
 847        /* Do we need fifohandcheck for RFBI? */
 848        mgr_config.fifohandcheck = false;
 849
 850        mgr_config.video_port_width = rfbi.pixel_size;
 851        mgr_config.lcden_sig_polarity = 0;
 852
 853        dss_mgr_set_lcd_config(mgr, &mgr_config);
 854
 855        /*
 856         * Set rfbi.timings with default values, the x_res and y_res fields
 857         * are expected to be already configured by the panel driver via
 858         * omapdss_rfbi_set_size()
 859         */
 860        rfbi.timings.hsw = 1;
 861        rfbi.timings.hfp = 1;
 862        rfbi.timings.hbp = 1;
 863        rfbi.timings.vsw = 1;
 864        rfbi.timings.vfp = 0;
 865        rfbi.timings.vbp = 0;
 866
 867        rfbi.timings.interlace = false;
 868        rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 869        rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 870        rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 871        rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
 872        rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
 873
 874        dss_mgr_set_timings(mgr, &rfbi.timings);
 875}
 876
 877static int rfbi_display_enable(struct omap_dss_device *dssdev)
 878{
 879        struct omap_dss_device *out = &rfbi.output;
 880        int r;
 881
 882        if (out == NULL || out->manager == NULL) {
 883                DSSERR("failed to enable display: no output/manager\n");
 884                return -ENODEV;
 885        }
 886
 887        r = rfbi_runtime_get();
 888        if (r)
 889                return r;
 890
 891        r = dss_mgr_register_framedone_handler(out->manager,
 892                        framedone_callback, NULL);
 893        if (r) {
 894                DSSERR("can't get FRAMEDONE irq\n");
 895                goto err1;
 896        }
 897
 898        rfbi_config_lcd_manager(dssdev);
 899
 900        rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
 901                        rfbi.data_lines);
 902
 903        rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings);
 904
 905        return 0;
 906err1:
 907        rfbi_runtime_put();
 908        return r;
 909}
 910
 911static void rfbi_display_disable(struct omap_dss_device *dssdev)
 912{
 913        struct omap_dss_device *out = &rfbi.output;
 914
 915        dss_mgr_unregister_framedone_handler(out->manager,
 916                        framedone_callback, NULL);
 917
 918        rfbi_runtime_put();
 919}
 920
 921static int rfbi_init_display(struct omap_dss_device *dssdev)
 922{
 923        rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
 924        return 0;
 925}
 926
 927static void rfbi_init_output(struct platform_device *pdev)
 928{
 929        struct omap_dss_device *out = &rfbi.output;
 930
 931        out->dev = &pdev->dev;
 932        out->id = OMAP_DSS_OUTPUT_DBI;
 933        out->output_type = OMAP_DISPLAY_TYPE_DBI;
 934        out->name = "rfbi.0";
 935        out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
 936        out->owner = THIS_MODULE;
 937
 938        omapdss_register_output(out);
 939}
 940
 941static void __exit rfbi_uninit_output(struct platform_device *pdev)
 942{
 943        struct omap_dss_device *out = &rfbi.output;
 944
 945        omapdss_unregister_output(out);
 946}
 947
 948/* RFBI HW IP initialisation */
 949static int omap_rfbihw_probe(struct platform_device *pdev)
 950{
 951        u32 rev;
 952        struct resource *rfbi_mem;
 953        struct clk *clk;
 954        int r;
 955
 956        rfbi.pdev = pdev;
 957
 958        sema_init(&rfbi.bus_lock, 1);
 959
 960        rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
 961        if (!rfbi_mem) {
 962                DSSERR("can't get IORESOURCE_MEM RFBI\n");
 963                return -EINVAL;
 964        }
 965
 966        rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
 967                                 resource_size(rfbi_mem));
 968        if (!rfbi.base) {
 969                DSSERR("can't ioremap RFBI\n");
 970                return -ENOMEM;
 971        }
 972
 973        clk = clk_get(&pdev->dev, "ick");
 974        if (IS_ERR(clk)) {
 975                DSSERR("can't get ick\n");
 976                return PTR_ERR(clk);
 977        }
 978
 979        rfbi.l4_khz = clk_get_rate(clk) / 1000;
 980
 981        clk_put(clk);
 982
 983        pm_runtime_enable(&pdev->dev);
 984
 985        r = rfbi_runtime_get();
 986        if (r)
 987                goto err_runtime_get;
 988
 989        msleep(10);
 990
 991        rev = rfbi_read_reg(RFBI_REVISION);
 992        dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
 993               FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
 994
 995        rfbi_runtime_put();
 996
 997        dss_debugfs_create_file("rfbi", rfbi_dump_regs);
 998
 999        rfbi_init_output(pdev);
1000
1001        return 0;
1002
1003err_runtime_get:
1004        pm_runtime_disable(&pdev->dev);
1005        return r;
1006}
1007
1008static int __exit omap_rfbihw_remove(struct platform_device *pdev)
1009{
1010        rfbi_uninit_output(pdev);
1011
1012        pm_runtime_disable(&pdev->dev);
1013
1014        return 0;
1015}
1016
1017static int rfbi_runtime_suspend(struct device *dev)
1018{
1019        dispc_runtime_put();
1020
1021        return 0;
1022}
1023
1024static int rfbi_runtime_resume(struct device *dev)
1025{
1026        int r;
1027
1028        r = dispc_runtime_get();
1029        if (r < 0)
1030                return r;
1031
1032        return 0;
1033}
1034
1035static const struct dev_pm_ops rfbi_pm_ops = {
1036        .runtime_suspend = rfbi_runtime_suspend,
1037        .runtime_resume = rfbi_runtime_resume,
1038};
1039
1040static struct platform_driver omap_rfbihw_driver = {
1041        .probe          = omap_rfbihw_probe,
1042        .remove         = __exit_p(omap_rfbihw_remove),
1043        .driver         = {
1044                .name   = "omapdss_rfbi",
1045                .pm     = &rfbi_pm_ops,
1046                .suppress_bind_attrs = true,
1047        },
1048};
1049
1050int __init rfbi_init_platform_driver(void)
1051{
1052        return platform_driver_register(&omap_rfbihw_driver);
1053}
1054
1055void __exit rfbi_uninit_platform_driver(void)
1056{
1057        platform_driver_unregister(&omap_rfbihw_driver);
1058}
1059
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