drivers/video/sh_mobile_lcdcfb.c

   1 /*
   2  * SuperH Mobile LCDC Framebuffer
   3  *
   4  * Copyright (c) 2008 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/mm.h>
  15 #include <linux/clk.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/slab.h>
  23 #include <linux/console.h>
  24 #include <linux/backlight.h>
  25 #include <linux/gpio.h>
  26 #include <video/sh_mobile_lcdc.h>
  27 #include <asm/atomic.h>
  28
  29 #include "sh_mobile_lcdcfb.h"
  30 #include "sh_mobile_meram.h"
  31
  32 #define SIDE_B_OFFSET 0x1000
  33 #define MIRROR_OFFSET 0x2000
  34
  35 /* shared registers */
  36 #define _LDDCKR 0x410
  37 #define _LDDCKSTPR 0x414
  38 #define _LDINTR 0x468
  39 #define _LDSR 0x46c
  40 #define _LDCNT1R 0x470
  41 #define _LDCNT2R 0x474
  42 #define _LDRCNTR 0x478
  43 #define _LDDDSR 0x47c
  44 #define _LDDWD0R 0x800
  45 #define _LDDRDR 0x840
  46 #define _LDDWAR 0x900
  47 #define _LDDRAR 0x904
  48
  49 /* shared registers and their order for context save/restore */
  50 static int lcdc_shared_regs[] = {
  51         _LDDCKR,
  52         _LDDCKSTPR,
  53         _LDINTR,
  54         _LDDDSR,
  55         _LDCNT1R,
  56         _LDCNT2R,
  57 };
  58 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
  59
  60 #define MAX_XRES 1920
  61 #define MAX_YRES 1080
  62
  63 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
  64         [LDDCKPAT1R] = 0x400,
  65         [LDDCKPAT2R] = 0x404,
  66         [LDMT1R] = 0x418,
  67         [LDMT2R] = 0x41c,
  68         [LDMT3R] = 0x420,
  69         [LDDFR] = 0x424,
  70         [LDSM1R] = 0x428,
  71         [LDSM2R] = 0x42c,
  72         [LDSA1R] = 0x430,
  73         [LDSA2R] = 0x434,
  74         [LDMLSR] = 0x438,
  75         [LDHCNR] = 0x448,
  76         [LDHSYNR] = 0x44c,
  77         [LDVLNR] = 0x450,
  78         [LDVSYNR] = 0x454,
  79         [LDPMR] = 0x460,
  80         [LDHAJR] = 0x4a0,
  81 };
  82
  83 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
  84         [LDDCKPAT1R] = 0x408,
  85         [LDDCKPAT2R] = 0x40c,
  86         [LDMT1R] = 0x600,
  87         [LDMT2R] = 0x604,
  88         [LDMT3R] = 0x608,
  89         [LDDFR] = 0x60c,
  90         [LDSM1R] = 0x610,
  91         [LDSM2R] = 0x614,
  92         [LDSA1R] = 0x618,
  93         [LDMLSR] = 0x620,
  94         [LDHCNR] = 0x624,
  95         [LDHSYNR] = 0x628,
  96         [LDVLNR] = 0x62c,
  97         [LDVSYNR] = 0x630,
  98         [LDPMR] = 0x63c,
  99 };
 100
 101 #define START_LCDC      0x00000001
 102 #define LCDC_RESET      0x00000100
 103 #define DISPLAY_BEU     0x00000008
 104 #define LCDC_ENABLE     0x00000001
 105 #define LDINTR_FE       0x00000400
 106 #define LDINTR_VSE      0x00000200
 107 #define LDINTR_VEE      0x00000100
 108 #define LDINTR_FS       0x00000004
 109 #define LDINTR_VSS      0x00000002
 110 #define LDINTR_VES      0x00000001
 111 #define LDRCNTR_SRS     0x00020000
 112 #define LDRCNTR_SRC     0x00010000
 113 #define LDRCNTR_MRS     0x00000002
 114 #define LDRCNTR_MRC     0x00000001
 115 #define LDSR_MRS        0x00000100
 116
 117 static const struct fb_videomode default_720p = {
 118         .name = "HDMI 720p",
 119         .xres = 1280,
 120         .yres = 720,
 121
 122         .left_margin = 220,
 123         .right_margin = 110,
 124         .hsync_len = 40,
 125
 126         .upper_margin = 20,
 127         .lower_margin = 5,
 128         .vsync_len = 5,
 129
 130         .pixclock = 13468,
 131         .refresh = 60,
 132         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
 133 };
 134
 135 struct sh_mobile_lcdc_priv {
 136         void __iomem *base;
 137         int irq;
 138         atomic_t hw_usecnt;
 139         struct device *dev;
 140         struct clk *dot_clk;
 141         unsigned long lddckr;
 142         struct sh_mobile_lcdc_chan ch[2];
 143         struct notifier_block notifier;
 144         unsigned long saved_shared_regs[NR_SHARED_REGS];
 145         int started;
 146         int forced_bpp; /* 2 channel LCDC must share bpp setting */
 147         struct sh_mobile_meram_info *meram_dev;
 148 };
 149
 150 static bool banked(int reg_nr)
 151 {
 152         switch (reg_nr) {
 153         case LDMT1R:
 154         case LDMT2R:
 155         case LDMT3R:
 156         case LDDFR:
 157         case LDSM1R:
 158         case LDSA1R:
 159         case LDSA2R:
 160         case LDMLSR:
 161         case LDHCNR:
 162         case LDHSYNR:
 163         case LDVLNR:
 164         case LDVSYNR:
 165                 return true;
 166         }
 167         return false;
 168 }
 169
 170 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 171                             int reg_nr, unsigned long data)
 172 {
 173         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 174         if (banked(reg_nr))
 175                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 176                           SIDE_B_OFFSET);
 177 }
 178
 179 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 180                             int reg_nr, unsigned long data)
 181 {
 182         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 183                   MIRROR_OFFSET);
 184 }
 185
 186 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 187                                     int reg_nr)
 188 {
 189         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 190 }
 191
 192 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 193                        unsigned long reg_offs, unsigned long data)
 194 {
 195         iowrite32(data, priv->base + reg_offs);
 196 }
 197
 198 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 199                                unsigned long reg_offs)
 200 {
 201         return ioread32(priv->base + reg_offs);
 202 }
 203
 204 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 205                           unsigned long reg_offs,
 206                           unsigned long mask, unsigned long until)
 207 {
 208         while ((lcdc_read(priv, reg_offs) & mask) != until)
 209                 cpu_relax();
 210 }
 211
 212 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 213 {
 214         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
 215 }
 216
 217 static void lcdc_sys_write_index(void *handle, unsigned long data)
 218 {
 219         struct sh_mobile_lcdc_chan *ch = handle;
 220
 221         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
 222         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 223         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 224         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 225 }
 226
 227 static void lcdc_sys_write_data(void *handle, unsigned long data)
 228 {
 229         struct sh_mobile_lcdc_chan *ch = handle;
 230
 231         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
 232         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 233         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 234         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 235 }
 236
 237 static unsigned long lcdc_sys_read_data(void *handle)
 238 {
 239         struct sh_mobile_lcdc_chan *ch = handle;
 240
 241         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
 242         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 243         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 244         udelay(1);
 245         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 246
 247         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
 248 }
 249
 250 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 251         lcdc_sys_write_index,
 252         lcdc_sys_write_data,
 253         lcdc_sys_read_data,
 254 };
 255
 256 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 257 {
 258         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 259                 pm_runtime_get_sync(priv->dev);
 260                 if (priv->dot_clk)
 261                         clk_enable(priv->dot_clk);
 262         }
 263 }
 264
 265 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 266 {
 267         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 268                 if (priv->dot_clk)
 269                         clk_disable(priv->dot_clk);
 270                 pm_runtime_put(priv->dev);
 271         }
 272 }
 273
 274 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 275                                   struct list_head *pagelist)
 276 {
 277         struct sh_mobile_lcdc_chan *ch = info->par;
 278         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
 279         struct page *page;
 280         int nr_pages = 0;
 281
 282         sg_init_table(ch->sglist, nr_pages_max);
 283
 284         list_for_each_entry(page, pagelist, lru)
 285                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 286
 287         return nr_pages;
 288 }
 289
 290 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 291                                        struct list_head *pagelist)
 292 {
 293         struct sh_mobile_lcdc_chan *ch = info->par;
 294         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
 295
 296         /* enable clocks before accessing hardware */
 297         sh_mobile_lcdc_clk_on(ch->lcdc);
 298
 299         /*
 300          * It's possible to get here without anything on the pagelist via
 301          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 302          * invocation. In the former case, the acceleration routines are
 303          * stepped in to when using the framebuffer console causing the
 304          * workqueue to be scheduled without any dirty pages on the list.
 305          *
 306          * Despite this, a panel update is still needed given that the
 307          * acceleration routines have their own methods for writing in
 308          * that still need to be updated.
 309          *
 310          * The fsync() and empty pagelist case could be optimized for,
 311          * but we don't bother, as any application exhibiting such
 312          * behaviour is fundamentally broken anyways.
 313          */
 314         if (!list_empty(pagelist)) {
 315                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 316
 317                 /* trigger panel update */
 318                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 319                 if (bcfg->start_transfer)
 320                         bcfg->start_transfer(bcfg->board_data, ch,
 321                                              &sh_mobile_lcdc_sys_bus_ops);
 322                 lcdc_write_chan(ch, LDSM2R, 1);
 323                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 324         } else {
 325                 if (bcfg->start_transfer)
 326                         bcfg->start_transfer(bcfg->board_data, ch,
 327                                              &sh_mobile_lcdc_sys_bus_ops);
 328                 lcdc_write_chan(ch, LDSM2R, 1);
 329         }
 330 }
 331
 332 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 333 {
 334         struct fb_deferred_io *fbdefio = info->fbdefio;
 335
 336         if (fbdefio)
 337                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 338 }
 339
 340 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 341 {
 342         struct sh_mobile_lcdc_priv *priv = data;
 343         struct sh_mobile_lcdc_chan *ch;
 344         unsigned long tmp;
 345         unsigned long ldintr;
 346         int is_sub;
 347         int k;
 348
 349         /* acknowledge interrupt */
 350         ldintr = tmp = lcdc_read(priv, _LDINTR);
 351         /*
 352          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
 353          * write 0 to bits 0-6 to ack all triggered IRQs.
 354          */
 355         tmp &= 0xffffff00 & ~LDINTR_VEE;
 356         lcdc_write(priv, _LDINTR, tmp);
 357
 358         /* figure out if this interrupt is for main or sub lcd */
 359         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
 360
 361         /* wake up channel and disable clocks */
 362         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 363                 ch = &priv->ch[k];
 364
 365                 if (!ch->enabled)
 366                         continue;
 367
 368                 /* Frame Start */
 369                 if (ldintr & LDINTR_FS) {
 370                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 371                                 ch->frame_end = 1;
 372                                 wake_up(&ch->frame_end_wait);
 373
 374                                 sh_mobile_lcdc_clk_off(priv);
 375                         }
 376                 }
 377
 378                 /* VSYNC End */
 379                 if (ldintr & LDINTR_VES)
 380                         complete(&ch->vsync_completion);
 381         }
 382
 383         return IRQ_HANDLED;
 384 }
 385
 386 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 387                                       int start)
 388 {
 389         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 390         int k;
 391
 392         /* start or stop the lcdc */
 393         if (start)
 394                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
 395         else
 396                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
 397
 398         /* wait until power is applied/stopped on all channels */
 399         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 400                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 401                         while (1) {
 402                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
 403                                 if (start && tmp == 3)
 404                                         break;
 405                                 if (!start && tmp == 0)
 406                                         break;
 407                                 cpu_relax();
 408                         }
 409
 410         if (!start)
 411                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 412 }
 413
 414 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 415 {
 416         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
 417         unsigned long h_total, hsync_pos, display_h_total;
 418         u32 tmp;
 419
 420         tmp = ch->ldmt1r_value;
 421         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
 422         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
 423         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
 424         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
 425         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
 426         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
 427         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
 428         lcdc_write_chan(ch, LDMT1R, tmp);
 429
 430         /* setup SYS bus */
 431         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
 432         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
 433
 434         /* horizontal configuration */
 435         h_total = display_var->xres + display_var->hsync_len +
 436                 display_var->left_margin + display_var->right_margin;
 437         tmp = h_total / 8; /* HTCN */
 438         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
 439         lcdc_write_chan(ch, LDHCNR, tmp);
 440
 441         hsync_pos = display_var->xres + display_var->right_margin;
 442         tmp = hsync_pos / 8; /* HSYNP */
 443         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
 444         lcdc_write_chan(ch, LDHSYNR, tmp);
 445
 446         /* vertical configuration */
 447         tmp = display_var->yres + display_var->vsync_len +
 448                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
 449         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
 450         lcdc_write_chan(ch, LDVLNR, tmp);
 451
 452         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
 453         tmp |= display_var->vsync_len << 16; /* VSYNW */
 454         lcdc_write_chan(ch, LDVSYNR, tmp);
 455
 456         /* Adjust horizontal synchronisation for HDMI */
 457         display_h_total = display_var->xres + display_var->hsync_len +
 458                 display_var->left_margin + display_var->right_margin;
 459         tmp = ((display_var->xres & 7) << 24) |
 460                 ((display_h_total & 7) << 16) |
 461                 ((display_var->hsync_len & 7) << 8) |
 462                 hsync_pos;
 463         lcdc_write_chan(ch, LDHAJR, tmp);
 464 }
 465
 466 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 467 {
 468         struct sh_mobile_lcdc_chan *ch;
 469         struct sh_mobile_lcdc_board_cfg *board_cfg;
 470         unsigned long tmp;
 471         int bpp = 0;
 472         unsigned long ldddsr;
 473         int k, m;
 474
 475         /* enable clocks before accessing the hardware */
 476         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 477                 if (priv->ch[k].enabled) {
 478                         sh_mobile_lcdc_clk_on(priv);
 479                         if (!bpp)
 480                                 bpp = priv->ch[k].info->var.bits_per_pixel;
 481                 }
 482         }
 483
 484         /* reset */
 485         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
 486         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
 487
 488         /* enable LCDC channels */
 489         tmp = lcdc_read(priv, _LDCNT2R);
 490         tmp |= priv->ch[0].enabled;
 491         tmp |= priv->ch[1].enabled;
 492         lcdc_write(priv, _LDCNT2R, tmp);
 493
 494         /* read data from external memory, avoid using the BEU for now */
 495         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
 496
 497         /* stop the lcdc first */
 498         sh_mobile_lcdc_start_stop(priv, 0);
 499
 500         /* configure clocks */
 501         tmp = priv->lddckr;
 502         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 503                 ch = &priv->ch[k];
 504
 505                 if (!priv->ch[k].enabled)
 506                         continue;
 507
 508                 m = ch->cfg.clock_divider;
 509                 if (!m)
 510                         continue;
 511
 512                 if (m == 1)
 513                         m = 1 << 6;
 514                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 515
 516                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
 517                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 518                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 519         }
 520
 521         lcdc_write(priv, _LDDCKR, tmp);
 522
 523         /* start dotclock again */
 524         lcdc_write(priv, _LDDCKSTPR, 0);
 525         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 526
 527         /* interrupts are disabled to begin with */
 528         lcdc_write(priv, _LDINTR, 0);
 529
 530         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 531                 ch = &priv->ch[k];
 532
 533                 if (!ch->enabled)
 534                         continue;
 535
 536                 sh_mobile_lcdc_geometry(ch);
 537
 538                 /* power supply */
 539                 lcdc_write_chan(ch, LDPMR, 0);
 540
 541                 board_cfg = &ch->cfg.board_cfg;
 542                 if (board_cfg->setup_sys) {
 543                         int ret = board_cfg->setup_sys(board_cfg->board_data,
 544                                                 ch, &sh_mobile_lcdc_sys_bus_ops);
 545                         if (ret)
 546                                 return ret;
 547                 }
 548         }
 549
 550         /* word and long word swap */
 551         ldddsr = lcdc_read(priv, _LDDDSR);
 552         if  (priv->ch[0].info->var.nonstd)
 553                 lcdc_write(priv, _LDDDSR, ldddsr | 7);
 554         else {
 555                 switch (bpp) {
 556                 case 16:
 557                         lcdc_write(priv, _LDDDSR, ldddsr | 6);
 558                         break;
 559                 case 24:
 560                         lcdc_write(priv, _LDDDSR, ldddsr | 7);
 561                         break;
 562                 case 32:
 563                         lcdc_write(priv, _LDDDSR, ldddsr | 4);
 564                         break;
 565                 }
 566         }
 567
 568         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 569                 unsigned long base_addr_y;
 570                 unsigned long base_addr_c = 0;
 571                 int pitch;
 572                 ch = &priv->ch[k];
 573
 574                 if (!priv->ch[k].enabled)
 575                         continue;
 576
 577                 /* set bpp format in PKF[4:0] */
 578                 tmp = lcdc_read_chan(ch, LDDFR);
 579                 tmp &= ~0x0003031f;
 580                 if (ch->info->var.nonstd) {
 581                         tmp |= (ch->info->var.nonstd << 16);
 582                         switch (ch->info->var.bits_per_pixel) {
 583                         case 12:
 584                                 break;
 585                         case 16:
 586                                 tmp |= (0x1 << 8);
 587                                 break;
 588                         case 24:
 589                                 tmp |= (0x2 << 8);
 590                                 break;
 591                         }
 592                 } else {
 593                         switch (ch->info->var.bits_per_pixel) {
 594                         case 16:
 595                                 tmp |= 0x03;
 596                                 break;
 597                         case 24:
 598                                 tmp |= 0x0b;
 599                                 break;
 600                         case 32:
 601                                 break;
 602                         }
 603                 }
 604                 lcdc_write_chan(ch, LDDFR, tmp);
 605
 606                 base_addr_y = ch->info->fix.smem_start;
 607                 base_addr_c = base_addr_y +
 608                                 ch->info->var.xres *
 609                                 ch->info->var.yres_virtual;
 610                 pitch = ch->info->fix.line_length;
 611
 612                 /* test if we can enable meram */
 613                 if (ch->cfg.meram_cfg && priv->meram_dev) {
 614                         struct sh_mobile_meram_cfg *cfg;
 615                         struct sh_mobile_meram_info *mdev;
 616                         unsigned long icb_addr_y, icb_addr_c;
 617                         int icb_pitch;
 618                         int pf;
 619
 620                         cfg = ch->cfg.meram_cfg;
 621                         mdev = priv->meram_dev;
 622                         /* we need to de-init configured ICBs before we
 623                          * we can re-initialize them.
 624                          */
 625                         if (ch->meram_enabled)
 626                                 mdev->ops->meram_unregister(mdev, cfg);
 627
 628                         ch->meram_enabled = 0;
 629
 630                         if (ch->info->var.nonstd) {
 631                                 if (ch->info->var.bits_per_pixel == 24)
 632                                         pf = SH_MOBILE_MERAM_PF_NV24;
 633                                 else
 634                                         pf = SH_MOBILE_MERAM_PF_NV;
 635                         } else {
 636                                 pf = SH_MOBILE_MERAM_PF_RGB;
 637                         }
 638
 639                         ret = mdev->ops->meram_register(mdev, cfg, pitch,
 640                                                 ch->info->var.yres,
 641                                                 pf,
 642                                                 base_addr_y,
 643                                                 base_addr_c,
 644                                                 &icb_addr_y,
 645                                                 &icb_addr_c,
 646                                                 &icb_pitch);
 647                         if (!ret)  {
 648                                 /* set LDSA1R value */
 649                                 base_addr_y = icb_addr_y;
 650                                 pitch = icb_pitch;
 651
 652                                 /* set LDSA2R value if required */
 653                                 if (base_addr_c)
 654                                         base_addr_c = icb_addr_c;
 655
 656                                 ch->meram_enabled = 1;
 657                         }
 658                 }
 659
 660                 /* point out our frame buffer */
 661                 lcdc_write_chan(ch, LDSA1R, base_addr_y);
 662                 if (ch->info->var.nonstd)
 663                         lcdc_write_chan(ch, LDSA2R, base_addr_c);
 664
 665                 /* set line size */
 666                 lcdc_write_chan(ch, LDMLSR, pitch);
 667
 668                 /* setup deferred io if SYS bus */
 669                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
 670                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
 671                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
 672                         ch->defio.delay = msecs_to_jiffies(tmp);
 673                         ch->info->fbdefio = &ch->defio;
 674                         fb_deferred_io_init(ch->info);
 675
 676                         /* one-shot mode */
 677                         lcdc_write_chan(ch, LDSM1R, 1);
 678
 679                         /* enable "Frame End Interrupt Enable" bit */
 680                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 681
 682                 } else {
 683                         /* continuous read mode */
 684                         lcdc_write_chan(ch, LDSM1R, 0);
 685                 }
 686         }
 687
 688         /* display output */
 689         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
 690
 691         /* start the lcdc */
 692         sh_mobile_lcdc_start_stop(priv, 1);
 693         priv->started = 1;
 694
 695         /* tell the board code to enable the panel */
 696         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 697                 ch = &priv->ch[k];
 698                 if (!ch->enabled)
 699                         continue;
 700
 701                 board_cfg = &ch->cfg.board_cfg;
 702                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
 703                         board_cfg->display_on(board_cfg->board_data, ch->info);
 704                         module_put(board_cfg->owner);
 705                 }
 706
 707                 if (ch->bl) {
 708                         ch->bl->props.power = FB_BLANK_UNBLANK;
 709                         backlight_update_status(ch->bl);
 710                 }
 711         }
 712
 713         return 0;
 714 }
 715
 716 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 717 {
 718         struct sh_mobile_lcdc_chan *ch;
 719         struct sh_mobile_lcdc_board_cfg *board_cfg;
 720         int k;
 721
 722         /* clean up deferred io and ask board code to disable panel */
 723         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 724                 ch = &priv->ch[k];
 725                 if (!ch->enabled)
 726                         continue;
 727
 728                 /* deferred io mode:
 729                  * flush frame, and wait for frame end interrupt
 730                  * clean up deferred io and enable clock
 731                  */
 732                 if (ch->info && ch->info->fbdefio) {
 733                         ch->frame_end = 0;
 734                         schedule_delayed_work(&ch->info->deferred_work, 0);
 735                         wait_event(ch->frame_end_wait, ch->frame_end);
 736                         fb_deferred_io_cleanup(ch->info);
 737                         ch->info->fbdefio = NULL;
 738                         sh_mobile_lcdc_clk_on(priv);
 739                 }
 740
 741                 if (ch->bl) {
 742                         ch->bl->props.power = FB_BLANK_POWERDOWN;
 743                         backlight_update_status(ch->bl);
 744                 }
 745
 746                 board_cfg = &ch->cfg.board_cfg;
 747                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
 748                         board_cfg->display_off(board_cfg->board_data);
 749                         module_put(board_cfg->owner);
 750                 }
 751
 752                 /* disable the meram */
 753                 if (ch->meram_enabled) {
 754                         struct sh_mobile_meram_cfg *cfg;
 755                         struct sh_mobile_meram_info *mdev;
 756                         cfg = ch->cfg.meram_cfg;
 757                         mdev = priv->meram_dev;
 758                         mdev->ops->meram_unregister(mdev, cfg);
 759                         ch->meram_enabled = 0;
 760                 }
 761
 762         }
 763
 764         /* stop the lcdc */
 765         if (priv->started) {
 766                 sh_mobile_lcdc_start_stop(priv, 0);
 767                 priv->started = 0;
 768         }
 769
 770         /* stop clocks */
 771         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 772                 if (priv->ch[k].enabled)
 773                         sh_mobile_lcdc_clk_off(priv);
 774 }
 775
 776 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
 777 {
 778         int ifm, miftyp;
 779
 780         switch (ch->cfg.interface_type) {
 781         case RGB8: ifm = 0; miftyp = 0; break;
 782         case RGB9: ifm = 0; miftyp = 4; break;
 783         case RGB12A: ifm = 0; miftyp = 5; break;
 784         case RGB12B: ifm = 0; miftyp = 6; break;
 785         case RGB16: ifm = 0; miftyp = 7; break;
 786         case RGB18: ifm = 0; miftyp = 10; break;
 787         case RGB24: ifm = 0; miftyp = 11; break;
 788         case SYS8A: ifm = 1; miftyp = 0; break;
 789         case SYS8B: ifm = 1; miftyp = 1; break;
 790         case SYS8C: ifm = 1; miftyp = 2; break;
 791         case SYS8D: ifm = 1; miftyp = 3; break;
 792         case SYS9: ifm = 1; miftyp = 4; break;
 793         case SYS12: ifm = 1; miftyp = 5; break;
 794         case SYS16A: ifm = 1; miftyp = 7; break;
 795         case SYS16B: ifm = 1; miftyp = 8; break;
 796         case SYS16C: ifm = 1; miftyp = 9; break;
 797         case SYS18: ifm = 1; miftyp = 10; break;
 798         case SYS24: ifm = 1; miftyp = 11; break;
 799         default: goto bad;
 800         }
 801
 802         /* SUBLCD only supports SYS interface */
 803         if (lcdc_chan_is_sublcd(ch)) {
 804                 if (ifm == 0)
 805                         goto bad;
 806                 else
 807                         ifm = 0;
 808         }
 809
 810         ch->ldmt1r_value = (ifm << 12) | miftyp;
 811         return 0;
 812  bad:
 813         return -EINVAL;
 814 }
 815
 816 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
 817                                        int clock_source,
 818                                        struct sh_mobile_lcdc_priv *priv)
 819 {
 820         char *str;
 821         int icksel;
 822
 823         switch (clock_source) {
 824         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
 825         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
 826         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
 827         default:
 828                 return -EINVAL;
 829         }
 830
 831         priv->lddckr = icksel << 16;
 832
 833         if (str) {
 834                 priv->dot_clk = clk_get(&pdev->dev, str);
 835                 if (IS_ERR(priv->dot_clk)) {
 836                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
 837                         return PTR_ERR(priv->dot_clk);
 838                 }
 839         }
 840
 841         /* Runtime PM support involves two step for this driver:
 842          * 1) Enable Runtime PM
 843          * 2) Force Runtime PM Resume since hardware is accessed from probe()
 844          */
 845         priv->dev = &pdev->dev;
 846         pm_runtime_enable(priv->dev);
 847         pm_runtime_resume(priv->dev);
 848         return 0;
 849 }
 850
 851 static int sh_mobile_lcdc_setcolreg(u_int regno,
 852                                     u_int red, u_int green, u_int blue,
 853                                     u_int transp, struct fb_info *info)
 854 {
 855         u32 *palette = info->pseudo_palette;
 856
 857         if (regno >= PALETTE_NR)
 858                 return -EINVAL;
 859
 860         /* only FB_VISUAL_TRUECOLOR supported */
 861
 862         red >>= 16 - info->var.red.length;
 863         green >>= 16 - info->var.green.length;
 864         blue >>= 16 - info->var.blue.length;
 865         transp >>= 16 - info->var.transp.length;
 866
 867         palette[regno] = (red << info->var.red.offset) |
 868           (green << info->var.green.offset) |
 869           (blue << info->var.blue.offset) |
 870           (transp << info->var.transp.offset);
 871
 872         return 0;
 873 }
 874
 875 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
 876         .id =           "SH Mobile LCDC",
 877         .type =         FB_TYPE_PACKED_PIXELS,
 878         .visual =       FB_VISUAL_TRUECOLOR,
 879         .accel =        FB_ACCEL_NONE,
 880         .xpanstep =     0,
 881         .ypanstep =     1,
 882         .ywrapstep =    0,
 883 };
 884
 885 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
 886                                     const struct fb_fillrect *rect)
 887 {
 888         sys_fillrect(info, rect);
 889         sh_mobile_lcdc_deferred_io_touch(info);
 890 }
 891
 892 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
 893                                     const struct fb_copyarea *area)
 894 {
 895         sys_copyarea(info, area);
 896         sh_mobile_lcdc_deferred_io_touch(info);
 897 }
 898
 899 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
 900                                      const struct fb_image *image)
 901 {
 902         sys_imageblit(info, image);
 903         sh_mobile_lcdc_deferred_io_touch(info);
 904 }
 905
 906 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 907                                      struct fb_info *info)
 908 {
 909         struct sh_mobile_lcdc_chan *ch = info->par;
 910         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
 911         unsigned long ldrcntr;
 912         unsigned long new_pan_offset;
 913         unsigned long base_addr_y, base_addr_c;
 914         unsigned long c_offset;
 915
 916         if (!var->nonstd)
 917                 new_pan_offset = (var->yoffset * info->fix.line_length) +
 918                         (var->xoffset * (info->var.bits_per_pixel / 8));
 919         else
 920                 new_pan_offset = (var->yoffset * info->fix.line_length) +
 921                         (var->xoffset);
 922
 923         if (new_pan_offset == ch->pan_offset)
 924                 return 0;       /* No change, do nothing */
 925
 926         ldrcntr = lcdc_read(priv, _LDRCNTR);
 927
 928         /* Set the source address for the next refresh */
 929         base_addr_y = ch->dma_handle + new_pan_offset;
 930         if (var->nonstd) {
 931                 /* Set y offset */
 932                 c_offset = (var->yoffset *
 933                         info->fix.line_length *
 934                         (info->var.bits_per_pixel - 8)) / 8;
 935                 base_addr_c = ch->dma_handle + var->xres * var->yres_virtual +
 936                         c_offset;
 937                 /* Set x offset */
 938                 if (info->var.bits_per_pixel == 24)
 939                         base_addr_c += 2 * var->xoffset;
 940                 else
 941                         base_addr_c += var->xoffset;
 942         } else
 943                 base_addr_c = 0;
 944
 945         if (!ch->meram_enabled) {
 946                 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
 947                 if (base_addr_c)
 948                         lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
 949         } else {
 950                 struct sh_mobile_meram_cfg *cfg;
 951                 struct sh_mobile_meram_info *mdev;
 952                 unsigned long icb_addr_y, icb_addr_c;
 953                 int ret;
 954
 955                 cfg = ch->cfg.meram_cfg;
 956                 mdev = priv->meram_dev;
 957                 ret = mdev->ops->meram_update(mdev, cfg,
 958                                         base_addr_y, base_addr_c,
 959                                         &icb_addr_y, &icb_addr_c);
 960                 if (ret)
 961                         return ret;
 962
 963                 lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y);
 964                 if (icb_addr_c)
 965                         lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c);
 966
 967         }
 968
 969         if (lcdc_chan_is_sublcd(ch))
 970                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
 971         else
 972                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
 973
 974         ch->pan_offset = new_pan_offset;
 975
 976         sh_mobile_lcdc_deferred_io_touch(info);
 977
 978         return 0;
 979 }
 980
 981 static int sh_mobile_wait_for_vsync(struct fb_info *info)
 982 {
 983         struct sh_mobile_lcdc_chan *ch = info->par;
 984         unsigned long ldintr;
 985         int ret;
 986
 987         /* Enable VSync End interrupt */
 988         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 989         ldintr |= LDINTR_VEE;
 990         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 991
 992         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 993                                                         msecs_to_jiffies(100));
 994         if (!ret)
 995                 return -ETIMEDOUT;
 996
 997         return 0;
 998 }
 999
1000 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1001                        unsigned long arg)
1002 {
1003         int retval;
1004
1005         switch (cmd) {
1006         case FBIO_WAITFORVSYNC:
1007                 retval = sh_mobile_wait_for_vsync(info);
1008                 break;
1009
1010         default:
1011                 retval = -ENOIOCTLCMD;
1012                 break;
1013         }
1014         return retval;
1015 }
1016
1017 static void sh_mobile_fb_reconfig(struct fb_info *info)
1018 {
1019         struct sh_mobile_lcdc_chan *ch = info->par;
1020         struct fb_videomode mode1, mode2;
1021         struct fb_event event;
1022         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1023
1024         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1025                 /* More framebuffer users are active */
1026                 return;
1027
1028         fb_var_to_videomode(&mode1, &ch->display_var);
1029         fb_var_to_videomode(&mode2, &info->var);
1030
1031         if (fb_mode_is_equal(&mode1, &mode2))
1032                 return;
1033
1034         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1035         if (fb_set_var(info, &ch->display_var) < 0)
1036                 /* Couldn't reconfigure, hopefully, can continue as before */
1037                 return;
1038
1039         if (info->var.nonstd)
1040                 info->fix.line_length = mode1.xres;
1041         else
1042                 info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
1043
1044         /*
1045          * fb_set_var() calls the notifier change internally, only if
1046          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1047          * user event, we have to call the chain ourselves.
1048          */
1049         event.info = info;
1050         event.data = &mode1;
1051         fb_notifier_call_chain(evnt, &event);
1052 }
1053
1054 /*
1055  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1056  * user == 1, or with console sem held, if user == 0.
1057  */
1058 static int sh_mobile_release(struct fb_info *info, int user)
1059 {
1060         struct sh_mobile_lcdc_chan *ch = info->par;
1061
1062         mutex_lock(&ch->open_lock);
1063         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1064
1065         ch->use_count--;
1066
1067         /* Nothing to reconfigure, when called from fbcon */
1068         if (user) {
1069                 console_lock();
1070                 sh_mobile_fb_reconfig(info);
1071                 console_unlock();
1072         }
1073
1074         mutex_unlock(&ch->open_lock);
1075
1076         return 0;
1077 }
1078
1079 static int sh_mobile_open(struct fb_info *info, int user)
1080 {
1081         struct sh_mobile_lcdc_chan *ch = info->par;
1082
1083         mutex_lock(&ch->open_lock);
1084         ch->use_count++;
1085
1086         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1087         mutex_unlock(&ch->open_lock);
1088
1089         return 0;
1090 }
1091
1092 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1093 {
1094         struct sh_mobile_lcdc_chan *ch = info->par;
1095         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1096
1097         if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
1098             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
1099                 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
1100                          var->left_margin, var->xres, var->right_margin, var->hsync_len,
1101                          var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
1102                          PICOS2KHZ(var->pixclock));
1103                 return -EINVAL;
1104         }
1105
1106         /* only accept the forced_bpp for dual channel configurations */
1107         if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1108                 return -EINVAL;
1109
1110         switch (var->bits_per_pixel) {
1111         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1112         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1113         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1114                 break;
1115         default:
1116                 return -EINVAL;
1117         }
1118
1119         return 0;
1120 }
1121
1122 /*
1123  * Screen blanking. Behavior is as follows:
1124  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1125  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1126  * FB_BLANK_VSYNC,
1127  * FB_BLANK_HSYNC,
1128  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1129  */
1130 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1131 {
1132         struct sh_mobile_lcdc_chan *ch = info->par;
1133         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1134
1135         /* blank the screen? */
1136         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1137                 struct fb_fillrect rect = {
1138                         .width = info->var.xres,
1139                         .height = info->var.yres,
1140                 };
1141                 sh_mobile_lcdc_fillrect(info, &rect);
1142         }
1143         /* turn clocks on? */
1144         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1145                 sh_mobile_lcdc_clk_on(p);
1146         }
1147         /* turn clocks off? */
1148         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1149                 /* make sure the screen is updated with the black fill before
1150                  * switching the clocks off. one vsync is not enough since
1151                  * blanking may occur in the middle of a refresh. deferred io
1152                  * mode will reenable the clocks and update the screen in time,
1153                  * so it does not need this. */
1154                 if (!info->fbdefio) {
1155                         sh_mobile_wait_for_vsync(info);
1156                         sh_mobile_wait_for_vsync(info);
1157                 }
1158                 sh_mobile_lcdc_clk_off(p);
1159         }
1160
1161         ch->blank_status = blank;
1162         return 0;
1163 }
1164
1165 static struct fb_ops sh_mobile_lcdc_ops = {
1166         .owner          = THIS_MODULE,
1167         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1168         .fb_read        = fb_sys_read,
1169         .fb_write       = fb_sys_write,
1170         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1171         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1172         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1173         .fb_blank       = sh_mobile_lcdc_blank,
1174         .fb_pan_display = sh_mobile_fb_pan_display,
1175         .fb_ioctl       = sh_mobile_ioctl,
1176         .fb_open        = sh_mobile_open,
1177         .fb_release     = sh_mobile_release,
1178         .fb_check_var   = sh_mobile_check_var,
1179 };
1180
1181 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1182 {
1183         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1184         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1185         int brightness = bdev->props.brightness;
1186
1187         if (bdev->props.power != FB_BLANK_UNBLANK ||
1188             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1189                 brightness = 0;
1190
1191         return cfg->set_brightness(cfg->board_data, brightness);
1192 }
1193
1194 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1195 {
1196         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1197         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1198
1199         return cfg->get_brightness(cfg->board_data);
1200 }
1201
1202 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1203                                    struct fb_info *info)
1204 {
1205         return (info->bl_dev == bdev);
1206 }
1207
1208 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1209         .options        = BL_CORE_SUSPENDRESUME,
1210         .update_status  = sh_mobile_lcdc_update_bl,
1211         .get_brightness = sh_mobile_lcdc_get_brightness,
1212         .check_fb       = sh_mobile_lcdc_check_fb,
1213 };
1214
1215 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1216                                                struct sh_mobile_lcdc_chan *ch)
1217 {
1218         struct backlight_device *bl;
1219
1220         bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1221                                        &sh_mobile_lcdc_bl_ops, NULL);
1222         if (IS_ERR(bl)) {
1223                 dev_err(parent, "unable to register backlight device: %ld\n",
1224                         PTR_ERR(bl));
1225                 return NULL;
1226         }
1227
1228         bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1229         bl->props.brightness = bl->props.max_brightness;
1230         backlight_update_status(bl);
1231
1232         return bl;
1233 }
1234
1235 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1236 {
1237         backlight_device_unregister(bdev);
1238 }
1239
1240 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp,
1241                                    int nonstd)
1242 {
1243         if (nonstd) {
1244                 switch (bpp) {
1245                 case 12:
1246                 case 16:
1247                 case 24:
1248                         var->bits_per_pixel = bpp;
1249                         var->nonstd = nonstd;
1250                         return 0;
1251                 default:
1252                         return -EINVAL;
1253                 }
1254         }
1255
1256         switch (bpp) {
1257         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1258                 var->red.offset = 11;
1259                 var->red.length = 5;
1260                 var->green.offset = 5;
1261                 var->green.length = 6;
1262                 var->blue.offset = 0;
1263                 var->blue.length = 5;
1264                 var->transp.offset = 0;
1265                 var->transp.length = 0;
1266                 break;
1267
1268         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1269                 var->red.offset = 16;
1270                 var->red.length = 8;
1271                 var->green.offset = 8;
1272                 var->green.length = 8;
1273                 var->blue.offset = 0;
1274                 var->blue.length = 8;
1275                 var->transp.offset = 0;
1276                 var->transp.length = 0;
1277                 break;
1278
1279         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1280                 var->red.offset = 16;
1281                 var->red.length = 8;
1282                 var->green.offset = 8;
1283                 var->green.length = 8;
1284                 var->blue.offset = 0;
1285                 var->blue.length = 8;
1286                 var->transp.offset = 24;
1287                 var->transp.length = 8;
1288                 break;
1289         default:
1290                 return -EINVAL;
1291         }
1292         var->bits_per_pixel = bpp;
1293         var->red.msb_right = 0;
1294         var->green.msb_right = 0;
1295         var->blue.msb_right = 0;
1296         var->transp.msb_right = 0;
1297         return 0;
1298 }
1299
1300 static int sh_mobile_lcdc_suspend(struct device *dev)
1301 {
1302         struct platform_device *pdev = to_platform_device(dev);
1303
1304         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1305         return 0;
1306 }
1307
1308 static int sh_mobile_lcdc_resume(struct device *dev)
1309 {
1310         struct platform_device *pdev = to_platform_device(dev);
1311
1312         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1313 }
1314
1315 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1316 {
1317         struct platform_device *pdev = to_platform_device(dev);
1318         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1319         struct sh_mobile_lcdc_chan *ch;
1320         int k, n;
1321
1322         /* save per-channel registers */
1323         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1324                 ch = &p->ch[k];
1325                 if (!ch->enabled)
1326                         continue;
1327                 for (n = 0; n < NR_CH_REGS; n++)
1328                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1329         }
1330
1331         /* save shared registers */
1332         for (n = 0; n < NR_SHARED_REGS; n++)
1333                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1334
1335         /* turn off LCDC hardware */
1336         lcdc_write(p, _LDCNT1R, 0);
1337         return 0;
1338 }
1339
1340 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1341 {
1342         struct platform_device *pdev = to_platform_device(dev);
1343         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1344         struct sh_mobile_lcdc_chan *ch;
1345         int k, n;
1346
1347         /* restore per-channel registers */
1348         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1349                 ch = &p->ch[k];
1350                 if (!ch->enabled)
1351                         continue;
1352                 for (n = 0; n < NR_CH_REGS; n++)
1353                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1354         }
1355
1356         /* restore shared registers */
1357         for (n = 0; n < NR_SHARED_REGS; n++)
1358                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1359
1360         return 0;
1361 }
1362
1363 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1364         .suspend = sh_mobile_lcdc_suspend,
1365         .resume = sh_mobile_lcdc_resume,
1366         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1367         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1368 };
1369
1370 /* locking: called with info->lock held */
1371 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1372                                  unsigned long action, void *data)
1373 {
1374         struct fb_event *event = data;
1375         struct fb_info *info = event->info;
1376         struct sh_mobile_lcdc_chan *ch = info->par;
1377         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1378
1379         if (&ch->lcdc->notifier != nb)
1380                 return NOTIFY_DONE;
1381
1382         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1383                 __func__, action, event->data);
1384
1385         switch(action) {
1386         case FB_EVENT_SUSPEND:
1387                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1388                         board_cfg->display_off(board_cfg->board_data);
1389                         module_put(board_cfg->owner);
1390                 }
1391                 sh_mobile_lcdc_stop(ch->lcdc);
1392                 break;
1393         case FB_EVENT_RESUME:
1394                 mutex_lock(&ch->open_lock);
1395                 sh_mobile_fb_reconfig(info);
1396                 mutex_unlock(&ch->open_lock);
1397
1398                 /* HDMI must be enabled before LCDC configuration */
1399                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1400                         board_cfg->display_on(board_cfg->board_data, info);
1401                         module_put(board_cfg->owner);
1402                 }
1403
1404                 sh_mobile_lcdc_start(ch->lcdc);
1405         }
1406
1407         return NOTIFY_OK;
1408 }
1409
1410 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1411
1412 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1413 {
1414         struct fb_info *info;
1415         struct sh_mobile_lcdc_priv *priv;
1416         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1417         struct resource *res;
1418         int error;
1419         void *buf;
1420         int i, j;
1421
1422         if (!pdata) {
1423                 dev_err(&pdev->dev, "no platform data defined\n");
1424                 return -EINVAL;
1425         }
1426
1427         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1428         i = platform_get_irq(pdev, 0);
1429         if (!res || i < 0) {
1430                 dev_err(&pdev->dev, "cannot get platform resources\n");
1431                 return -ENOENT;
1432         }
1433
1434         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1435         if (!priv) {
1436                 dev_err(&pdev->dev, "cannot allocate device data\n");
1437                 return -ENOMEM;
1438         }
1439
1440         platform_set_drvdata(pdev, priv);
1441
1442         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1443                             dev_name(&pdev->dev), priv);
1444         if (error) {
1445                 dev_err(&pdev->dev, "unable to request irq\n");
1446                 goto err1;
1447         }
1448
1449         priv->irq = i;
1450         atomic_set(&priv->hw_usecnt, -1);
1451
1452         j = 0;
1453         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1454                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1455
1456                 ch->lcdc = priv;
1457                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1458
1459                 error = sh_mobile_lcdc_check_interface(ch);
1460                 if (error) {
1461                         dev_err(&pdev->dev, "unsupported interface type\n");
1462                         goto err1;
1463                 }
1464                 init_waitqueue_head(&ch->frame_end_wait);
1465                 init_completion(&ch->vsync_completion);
1466                 ch->pan_offset = 0;
1467
1468                 /* probe the backlight is there is one defined */
1469                 if (ch->cfg.bl_info.max_brightness)
1470                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1471
1472                 switch (pdata->ch[i].chan) {
1473                 case LCDC_CHAN_MAINLCD:
1474                         ch->enabled = 1 << 1;
1475                         ch->reg_offs = lcdc_offs_mainlcd;
1476                         j++;
1477                         break;
1478                 case LCDC_CHAN_SUBLCD:
1479                         ch->enabled = 1 << 2;
1480                         ch->reg_offs = lcdc_offs_sublcd;
1481                         j++;
1482                         break;
1483                 }
1484         }
1485
1486         if (!j) {
1487                 dev_err(&pdev->dev, "no channels defined\n");
1488                 error = -EINVAL;
1489                 goto err1;
1490         }
1491
1492         /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1493         if (j == 2)
1494                 priv->forced_bpp = pdata->ch[0].bpp;
1495
1496         priv->base = ioremap_nocache(res->start, resource_size(res));
1497         if (!priv->base)
1498                 goto err1;
1499
1500         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1501         if (error) {
1502                 dev_err(&pdev->dev, "unable to setup clocks\n");
1503                 goto err1;
1504         }
1505
1506         priv->meram_dev = pdata->meram_dev;
1507
1508         for (i = 0; i < j; i++) {
1509                 struct fb_var_screeninfo *var;
1510                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1511                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1512                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1513                 const struct fb_videomode *mode = cfg->lcd_cfg;
1514                 unsigned long max_size = 0;
1515                 int k;
1516                 int num_cfg;
1517
1518                 ch->info = framebuffer_alloc(0, &pdev->dev);
1519                 if (!ch->info) {
1520                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1521                         error = -ENOMEM;
1522                         break;
1523                 }
1524
1525                 info = ch->info;
1526                 var = &info->var;
1527                 info->fbops = &sh_mobile_lcdc_ops;
1528                 info->par = ch;
1529
1530                 mutex_init(&ch->open_lock);
1531
1532                 for (k = 0, lcd_cfg = mode;
1533                      k < cfg->num_cfg && lcd_cfg;
1534                      k++, lcd_cfg++) {
1535                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1536                         /* NV12 buffers must have even number of lines */
1537                         if ((cfg->nonstd) && cfg->bpp == 12 &&
1538                                         (lcd_cfg->yres & 0x1)) {
1539                                 dev_err(&pdev->dev, "yres must be multiple of 2"
1540                                                 " for YCbCr420 mode.\n");
1541                                 error = -EINVAL;
1542                                 goto err1;
1543                         }
1544
1545                         if (size > max_size) {
1546                                 max_cfg = lcd_cfg;
1547                                 max_size = size;
1548                         }
1549                 }
1550
1551                 if (!mode)
1552                         max_size = MAX_XRES * MAX_YRES;
1553                 else if (max_cfg)
1554                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1555                                 max_cfg->xres, max_cfg->yres);
1556
1557                 info->fix = sh_mobile_lcdc_fix;
1558                 info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1559
1560                  /* Only pan in 2 line steps for NV12 */
1561                 if (cfg->nonstd && cfg->bpp == 12)
1562                         info->fix.ypanstep = 2;
1563
1564                 if (!mode) {
1565                         mode = &default_720p;
1566                         num_cfg = 1;
1567                 } else {
1568                         num_cfg = cfg->num_cfg;
1569                 }
1570
1571                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1572
1573                 fb_videomode_to_var(var, mode);
1574                 var->width = cfg->lcd_size_cfg.width;
1575                 var->height = cfg->lcd_size_cfg.height;
1576                 /* Default Y virtual resolution is 2x panel size */
1577                 var->yres_virtual = var->yres * 2;
1578                 var->activate = FB_ACTIVATE_NOW;
1579
1580                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
1581                 if (error)
1582                         break;
1583
1584                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1585                                          &ch->dma_handle, GFP_KERNEL);
1586                 if (!buf) {
1587                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1588                         error = -ENOMEM;
1589                         break;
1590                 }
1591
1592                 info->pseudo_palette = &ch->pseudo_palette;
1593                 info->flags = FBINFO_FLAG_DEFAULT;
1594
1595                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1596                 if (error < 0) {
1597                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1598                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1599                                           buf, ch->dma_handle);
1600                         break;
1601                 }
1602
1603                 info->fix.smem_start = ch->dma_handle;
1604                 if (var->nonstd)
1605                         info->fix.line_length = var->xres;
1606                 else
1607                         info->fix.line_length = var->xres * (cfg->bpp / 8);
1608
1609                 info->screen_base = buf;
1610                 info->device = &pdev->dev;
1611                 ch->display_var = *var;
1612         }
1613
1614         if (error)
1615                 goto err1;
1616
1617         error = sh_mobile_lcdc_start(priv);
1618         if (error) {
1619                 dev_err(&pdev->dev, "unable to start hardware\n");
1620                 goto err1;
1621         }
1622
1623         for (i = 0; i < j; i++) {
1624                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1625
1626                 info = ch->info;
1627
1628                 if (info->fbdefio) {
1629                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1630                                         info->fix.smem_len >> PAGE_SHIFT);
1631                         if (!ch->sglist) {
1632                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1633                                 goto err1;
1634                         }
1635                 }
1636
1637                 info->bl_dev = ch->bl;
1638
1639                 error = register_framebuffer(info);
1640                 if (error < 0)
1641                         goto err1;
1642
1643                 dev_info(info->dev,
1644                          "registered %s/%s as %dx%d %dbpp.\n",
1645                          pdev->name,
1646                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1647                          "mainlcd" : "sublcd",
1648                          info->var.xres, info->var.yres,
1649                          ch->cfg.bpp);
1650
1651                 /* deferred io mode: disable clock to save power */
1652                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1653                         sh_mobile_lcdc_clk_off(priv);
1654         }
1655
1656         /* Failure ignored */
1657         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1658         fb_register_client(&priv->notifier);
1659
1660         return 0;
1661 err1:
1662         sh_mobile_lcdc_remove(pdev);
1663
1664         return error;
1665 }
1666
1667 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1668 {
1669         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1670         struct fb_info *info;
1671         int i;
1672
1673         fb_unregister_client(&priv->notifier);
1674
1675         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1676                 if (priv->ch[i].info && priv->ch[i].info->dev)
1677                         unregister_framebuffer(priv->ch[i].info);
1678
1679         sh_mobile_lcdc_stop(priv);
1680
1681         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1682                 info = priv->ch[i].info;
1683
1684                 if (!info || !info->device)
1685                         continue;
1686
1687                 if (priv->ch[i].sglist)
1688                         vfree(priv->ch[i].sglist);
1689
1690                 if (info->screen_base)
1691                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1692                                           info->screen_base,
1693                                           priv->ch[i].dma_handle);
1694                 fb_dealloc_cmap(&info->cmap);
1695                 framebuffer_release(info);
1696         }
1697
1698         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1699                 if (priv->ch[i].bl)
1700                         sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1701         }
1702
1703         if (priv->dot_clk)
1704                 clk_put(priv->dot_clk);
1705
1706         if (priv->dev)
1707                 pm_runtime_disable(priv->dev);
1708
1709         if (priv->base)
1710                 iounmap(priv->base);
1711
1712         if (priv->irq)
1713                 free_irq(priv->irq, priv);
1714         kfree(priv);
1715         return 0;
1716 }
1717
1718 static struct platform_driver sh_mobile_lcdc_driver = {
1719         .driver         = {
1720                 .name           = "sh_mobile_lcdc_fb",
1721                 .owner          = THIS_MODULE,
1722                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1723         },
1724         .probe          = sh_mobile_lcdc_probe,
1725         .remove         = sh_mobile_lcdc_remove,
1726 };
1727
1728 static int __init sh_mobile_lcdc_init(void)
1729 {
1730         return platform_driver_register(&sh_mobile_lcdc_driver);
1731 }
1732
1733 static void __exit sh_mobile_lcdc_exit(void)
1734 {
1735         platform_driver_unregister(&sh_mobile_lcdc_driver);
1736 }
1737
1738 module_init(sh_mobile_lcdc_init);
1739 module_exit(sh_mobile_lcdc_exit);
1740
1741 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1742 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1743 MODULE_LICENSE("GPL v2");