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