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 <video/sh_mobile_lcdc.h>
  25 #include <asm/atomic.h>
  26
  27 #include "sh_mobile_lcdcfb.h"
  28
  29 #define SIDE_B_OFFSET 0x1000
  30 #define MIRROR_OFFSET 0x2000
  31
  32 /* shared registers */
  33 #define _LDDCKR 0x410
  34 #define _LDDCKSTPR 0x414
  35 #define _LDINTR 0x468
  36 #define _LDSR 0x46c
  37 #define _LDCNT1R 0x470
  38 #define _LDCNT2R 0x474
  39 #define _LDRCNTR 0x478
  40 #define _LDDDSR 0x47c
  41 #define _LDDWD0R 0x800
  42 #define _LDDRDR 0x840
  43 #define _LDDWAR 0x900
  44 #define _LDDRAR 0x904
  45
  46 /* shared registers and their order for context save/restore */
  47 static int lcdc_shared_regs[] = {
  48         _LDDCKR,
  49         _LDDCKSTPR,
  50         _LDINTR,
  51         _LDDDSR,
  52         _LDCNT1R,
  53         _LDCNT2R,
  54 };
  55 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
  56
  57 #define MAX_XRES 1920
  58 #define MAX_YRES 1080
  59
  60 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
  61         [LDDCKPAT1R] = 0x400,
  62         [LDDCKPAT2R] = 0x404,
  63         [LDMT1R] = 0x418,
  64         [LDMT2R] = 0x41c,
  65         [LDMT3R] = 0x420,
  66         [LDDFR] = 0x424,
  67         [LDSM1R] = 0x428,
  68         [LDSM2R] = 0x42c,
  69         [LDSA1R] = 0x430,
  70         [LDMLSR] = 0x438,
  71         [LDHCNR] = 0x448,
  72         [LDHSYNR] = 0x44c,
  73         [LDVLNR] = 0x450,
  74         [LDVSYNR] = 0x454,
  75         [LDPMR] = 0x460,
  76         [LDHAJR] = 0x4a0,
  77 };
  78
  79 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
  80         [LDDCKPAT1R] = 0x408,
  81         [LDDCKPAT2R] = 0x40c,
  82         [LDMT1R] = 0x600,
  83         [LDMT2R] = 0x604,
  84         [LDMT3R] = 0x608,
  85         [LDDFR] = 0x60c,
  86         [LDSM1R] = 0x610,
  87         [LDSM2R] = 0x614,
  88         [LDSA1R] = 0x618,
  89         [LDMLSR] = 0x620,
  90         [LDHCNR] = 0x624,
  91         [LDHSYNR] = 0x628,
  92         [LDVLNR] = 0x62c,
  93         [LDVSYNR] = 0x630,
  94         [LDPMR] = 0x63c,
  95 };
  96
  97 #define START_LCDC      0x00000001
  98 #define LCDC_RESET      0x00000100
  99 #define DISPLAY_BEU     0x00000008
 100 #define LCDC_ENABLE     0x00000001
 101 #define LDINTR_FE       0x00000400
 102 #define LDINTR_VSE      0x00000200
 103 #define LDINTR_VEE      0x00000100
 104 #define LDINTR_FS       0x00000004
 105 #define LDINTR_VSS      0x00000002
 106 #define LDINTR_VES      0x00000001
 107 #define LDRCNTR_SRS     0x00020000
 108 #define LDRCNTR_SRC     0x00010000
 109 #define LDRCNTR_MRS     0x00000002
 110 #define LDRCNTR_MRC     0x00000001
 111 #define LDSR_MRS        0x00000100
 112
 113 static const struct fb_videomode default_720p = {
 114         .name = "HDMI 720p",
 115         .xres = 1280,
 116         .yres = 720,
 117
 118         .left_margin = 220,
 119         .right_margin = 110,
 120         .hsync_len = 40,
 121
 122         .upper_margin = 20,
 123         .lower_margin = 5,
 124         .vsync_len = 5,
 125
 126         .pixclock = 13468,
 127         .refresh = 60,
 128         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
 129 };
 130
 131 struct sh_mobile_lcdc_priv {
 132         void __iomem *base;
 133         int irq;
 134         atomic_t hw_usecnt;
 135         struct device *dev;
 136         struct clk *dot_clk;
 137         unsigned long lddckr;
 138         struct sh_mobile_lcdc_chan ch[2];
 139         struct notifier_block notifier;
 140         unsigned long saved_shared_regs[NR_SHARED_REGS];
 141         int started;
 142         int forced_bpp; /* 2 channel LCDC must share bpp setting */
 143 };
 144
 145 static bool banked(int reg_nr)
 146 {
 147         switch (reg_nr) {
 148         case LDMT1R:
 149         case LDMT2R:
 150         case LDMT3R:
 151         case LDDFR:
 152         case LDSM1R:
 153         case LDSA1R:
 154         case LDMLSR:
 155         case LDHCNR:
 156         case LDHSYNR:
 157         case LDVLNR:
 158         case LDVSYNR:
 159                 return true;
 160         }
 161         return false;
 162 }
 163
 164 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 165                             int reg_nr, unsigned long data)
 166 {
 167         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 168         if (banked(reg_nr))
 169                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 170                           SIDE_B_OFFSET);
 171 }
 172
 173 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 174                             int reg_nr, unsigned long data)
 175 {
 176         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 177                   MIRROR_OFFSET);
 178 }
 179
 180 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 181                                     int reg_nr)
 182 {
 183         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 184 }
 185
 186 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 187                        unsigned long reg_offs, unsigned long data)
 188 {
 189         iowrite32(data, priv->base + reg_offs);
 190 }
 191
 192 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 193                                unsigned long reg_offs)
 194 {
 195         return ioread32(priv->base + reg_offs);
 196 }
 197
 198 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 199                           unsigned long reg_offs,
 200                           unsigned long mask, unsigned long until)
 201 {
 202         while ((lcdc_read(priv, reg_offs) & mask) != until)
 203                 cpu_relax();
 204 }
 205
 206 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 207 {
 208         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
 209 }
 210
 211 static void lcdc_sys_write_index(void *handle, unsigned long data)
 212 {
 213         struct sh_mobile_lcdc_chan *ch = handle;
 214
 215         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
 216         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 217         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 218         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 219 }
 220
 221 static void lcdc_sys_write_data(void *handle, unsigned long data)
 222 {
 223         struct sh_mobile_lcdc_chan *ch = handle;
 224
 225         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
 226         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 227         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 228         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 229 }
 230
 231 static unsigned long lcdc_sys_read_data(void *handle)
 232 {
 233         struct sh_mobile_lcdc_chan *ch = handle;
 234
 235         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
 236         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 237         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 238         udelay(1);
 239         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 240
 241         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
 242 }
 243
 244 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 245         lcdc_sys_write_index,
 246         lcdc_sys_write_data,
 247         lcdc_sys_read_data,
 248 };
 249
 250 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 251 {
 252         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 253                 pm_runtime_get_sync(priv->dev);
 254                 if (priv->dot_clk)
 255                         clk_enable(priv->dot_clk);
 256         }
 257 }
 258
 259 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 260 {
 261         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 262                 if (priv->dot_clk)
 263                         clk_disable(priv->dot_clk);
 264                 pm_runtime_put(priv->dev);
 265         }
 266 }
 267
 268 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 269                                   struct list_head *pagelist)
 270 {
 271         struct sh_mobile_lcdc_chan *ch = info->par;
 272         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
 273         struct page *page;
 274         int nr_pages = 0;
 275
 276         sg_init_table(ch->sglist, nr_pages_max);
 277
 278         list_for_each_entry(page, pagelist, lru)
 279                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 280
 281         return nr_pages;
 282 }
 283
 284 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 285                                        struct list_head *pagelist)
 286 {
 287         struct sh_mobile_lcdc_chan *ch = info->par;
 288         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
 289
 290         /* enable clocks before accessing hardware */
 291         sh_mobile_lcdc_clk_on(ch->lcdc);
 292
 293         /*
 294          * It's possible to get here without anything on the pagelist via
 295          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 296          * invocation. In the former case, the acceleration routines are
 297          * stepped in to when using the framebuffer console causing the
 298          * workqueue to be scheduled without any dirty pages on the list.
 299          *
 300          * Despite this, a panel update is still needed given that the
 301          * acceleration routines have their own methods for writing in
 302          * that still need to be updated.
 303          *
 304          * The fsync() and empty pagelist case could be optimized for,
 305          * but we don't bother, as any application exhibiting such
 306          * behaviour is fundamentally broken anyways.
 307          */
 308         if (!list_empty(pagelist)) {
 309                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 310
 311                 /* trigger panel update */
 312                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 313                 if (bcfg->start_transfer)
 314                         bcfg->start_transfer(bcfg->board_data, ch,
 315                                              &sh_mobile_lcdc_sys_bus_ops);
 316                 lcdc_write_chan(ch, LDSM2R, 1);
 317                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 318         } else {
 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         }
 324 }
 325
 326 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 327 {
 328         struct fb_deferred_io *fbdefio = info->fbdefio;
 329
 330         if (fbdefio)
 331                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 332 }
 333
 334 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 335 {
 336         struct sh_mobile_lcdc_priv *priv = data;
 337         struct sh_mobile_lcdc_chan *ch;
 338         unsigned long tmp;
 339         unsigned long ldintr;
 340         int is_sub;
 341         int k;
 342
 343         /* acknowledge interrupt */
 344         ldintr = tmp = lcdc_read(priv, _LDINTR);
 345         /*
 346          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
 347          * write 0 to bits 0-6 to ack all triggered IRQs.
 348          */
 349         tmp &= 0xffffff00 & ~LDINTR_VEE;
 350         lcdc_write(priv, _LDINTR, tmp);
 351
 352         /* figure out if this interrupt is for main or sub lcd */
 353         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
 354
 355         /* wake up channel and disable clocks */
 356         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 357                 ch = &priv->ch[k];
 358
 359                 if (!ch->enabled)
 360                         continue;
 361
 362                 /* Frame Start */
 363                 if (ldintr & LDINTR_FS) {
 364                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 365                                 ch->frame_end = 1;
 366                                 wake_up(&ch->frame_end_wait);
 367
 368                                 sh_mobile_lcdc_clk_off(priv);
 369                         }
 370                 }
 371
 372                 /* VSYNC End */
 373                 if (ldintr & LDINTR_VES)
 374                         complete(&ch->vsync_completion);
 375         }
 376
 377         return IRQ_HANDLED;
 378 }
 379
 380 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 381                                       int start)
 382 {
 383         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 384         int k;
 385
 386         /* start or stop the lcdc */
 387         if (start)
 388                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
 389         else
 390                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
 391
 392         /* wait until power is applied/stopped on all channels */
 393         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 394                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 395                         while (1) {
 396                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
 397                                 if (start && tmp == 3)
 398                                         break;
 399                                 if (!start && tmp == 0)
 400                                         break;
 401                                 cpu_relax();
 402                         }
 403
 404         if (!start)
 405                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 406 }
 407
 408 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 409 {
 410         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
 411         unsigned long h_total, hsync_pos, display_h_total;
 412         u32 tmp;
 413
 414         tmp = ch->ldmt1r_value;
 415         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
 416         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
 417         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
 418         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
 419         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
 420         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
 421         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
 422         lcdc_write_chan(ch, LDMT1R, tmp);
 423
 424         /* setup SYS bus */
 425         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
 426         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
 427
 428         /* horizontal configuration */
 429         h_total = display_var->xres + display_var->hsync_len +
 430                 display_var->left_margin + display_var->right_margin;
 431         tmp = h_total / 8; /* HTCN */
 432         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
 433         lcdc_write_chan(ch, LDHCNR, tmp);
 434
 435         hsync_pos = display_var->xres + display_var->right_margin;
 436         tmp = hsync_pos / 8; /* HSYNP */
 437         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
 438         lcdc_write_chan(ch, LDHSYNR, tmp);
 439
 440         /* vertical configuration */
 441         tmp = display_var->yres + display_var->vsync_len +
 442                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
 443         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
 444         lcdc_write_chan(ch, LDVLNR, tmp);
 445
 446         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
 447         tmp |= display_var->vsync_len << 16; /* VSYNW */
 448         lcdc_write_chan(ch, LDVSYNR, tmp);
 449
 450         /* Adjust horizontal synchronisation for HDMI */
 451         display_h_total = display_var->xres + display_var->hsync_len +
 452                 display_var->left_margin + display_var->right_margin;
 453         tmp = ((display_var->xres & 7) << 24) |
 454                 ((display_h_total & 7) << 16) |
 455                 ((display_var->hsync_len & 7) << 8) |
 456                 hsync_pos;
 457         lcdc_write_chan(ch, LDHAJR, tmp);
 458 }
 459
 460 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 461 {
 462         struct sh_mobile_lcdc_chan *ch;
 463         struct sh_mobile_lcdc_board_cfg *board_cfg;
 464         unsigned long tmp;
 465         int bpp = 0;
 466         int k, m;
 467         int ret = 0;
 468
 469         /* enable clocks before accessing the hardware */
 470         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 471                 if (priv->ch[k].enabled) {
 472                         sh_mobile_lcdc_clk_on(priv);
 473                         if (!bpp)
 474                                 bpp = priv->ch[k].info->var.bits_per_pixel;
 475                 }
 476         }
 477
 478         /* reset */
 479         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
 480         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
 481
 482         /* enable LCDC channels */
 483         tmp = lcdc_read(priv, _LDCNT2R);
 484         tmp |= priv->ch[0].enabled;
 485         tmp |= priv->ch[1].enabled;
 486         lcdc_write(priv, _LDCNT2R, tmp);
 487
 488         /* read data from external memory, avoid using the BEU for now */
 489         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
 490
 491         /* stop the lcdc first */
 492         sh_mobile_lcdc_start_stop(priv, 0);
 493
 494         /* configure clocks */
 495         tmp = priv->lddckr;
 496         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 497                 ch = &priv->ch[k];
 498
 499                 if (!priv->ch[k].enabled)
 500                         continue;
 501
 502                 m = ch->cfg.clock_divider;
 503                 if (!m)
 504                         continue;
 505
 506                 if (m == 1)
 507                         m = 1 << 6;
 508                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 509
 510                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
 511                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 512                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 513         }
 514
 515         lcdc_write(priv, _LDDCKR, tmp);
 516
 517         /* start dotclock again */
 518         lcdc_write(priv, _LDDCKSTPR, 0);
 519         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 520
 521         /* interrupts are disabled to begin with */
 522         lcdc_write(priv, _LDINTR, 0);
 523
 524         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 525                 ch = &priv->ch[k];
 526
 527                 if (!ch->enabled)
 528                         continue;
 529
 530                 sh_mobile_lcdc_geometry(ch);
 531
 532                 /* power supply */
 533                 lcdc_write_chan(ch, LDPMR, 0);
 534
 535                 board_cfg = &ch->cfg.board_cfg;
 536                 if (board_cfg->setup_sys)
 537                         ret = board_cfg->setup_sys(board_cfg->board_data, ch,
 538                                                    &sh_mobile_lcdc_sys_bus_ops);
 539                 if (ret)
 540                         return ret;
 541         }
 542
 543         /* word and long word swap */
 544         switch (bpp) {
 545         case 16:
 546                 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
 547                 break;
 548         case 24:
 549                 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 7);
 550                 break;
 551         case 32:
 552                 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 4);
 553                 break;
 554         }
 555
 556         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 557                 ch = &priv->ch[k];
 558
 559                 if (!priv->ch[k].enabled)
 560                         continue;
 561
 562                 /* set bpp format in PKF[4:0] */
 563                 tmp = lcdc_read_chan(ch, LDDFR);
 564                 tmp &= ~0x0001001f;
 565                 switch (ch->info->var.bits_per_pixel) {
 566                 case 16:
 567                         tmp |= 0x03;
 568                         break;
 569                 case 24:
 570                         tmp |= 0x0b;
 571                         break;
 572                 case 32:
 573                         break;
 574                 }
 575                 lcdc_write_chan(ch, LDDFR, tmp);
 576
 577                 /* point out our frame buffer */
 578                 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
 579
 580                 /* set line size */
 581                 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
 582
 583                 /* setup deferred io if SYS bus */
 584                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
 585                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
 586                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
 587                         ch->defio.delay = msecs_to_jiffies(tmp);
 588                         ch->info->fbdefio = &ch->defio;
 589                         fb_deferred_io_init(ch->info);
 590
 591                         /* one-shot mode */
 592                         lcdc_write_chan(ch, LDSM1R, 1);
 593
 594                         /* enable "Frame End Interrupt Enable" bit */
 595                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 596
 597                 } else {
 598                         /* continuous read mode */
 599                         lcdc_write_chan(ch, LDSM1R, 0);
 600                 }
 601         }
 602
 603         /* display output */
 604         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
 605
 606         /* start the lcdc */
 607         sh_mobile_lcdc_start_stop(priv, 1);
 608         priv->started = 1;
 609
 610         /* tell the board code to enable the panel */
 611         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 612                 ch = &priv->ch[k];
 613                 if (!ch->enabled)
 614                         continue;
 615
 616                 board_cfg = &ch->cfg.board_cfg;
 617                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
 618                         board_cfg->display_on(board_cfg->board_data, ch->info);
 619                         module_put(board_cfg->owner);
 620                 }
 621         }
 622
 623         return 0;
 624 }
 625
 626 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 627 {
 628         struct sh_mobile_lcdc_chan *ch;
 629         struct sh_mobile_lcdc_board_cfg *board_cfg;
 630         int k;
 631
 632         /* clean up deferred io and ask board code to disable panel */
 633         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 634                 ch = &priv->ch[k];
 635                 if (!ch->enabled)
 636                         continue;
 637
 638                 /* deferred io mode:
 639                  * flush frame, and wait for frame end interrupt
 640                  * clean up deferred io and enable clock
 641                  */
 642                 if (ch->info && ch->info->fbdefio) {
 643                         ch->frame_end = 0;
 644                         schedule_delayed_work(&ch->info->deferred_work, 0);
 645                         wait_event(ch->frame_end_wait, ch->frame_end);
 646                         fb_deferred_io_cleanup(ch->info);
 647                         ch->info->fbdefio = NULL;
 648                         sh_mobile_lcdc_clk_on(priv);
 649                 }
 650
 651                 board_cfg = &ch->cfg.board_cfg;
 652                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
 653                         board_cfg->display_off(board_cfg->board_data);
 654                         module_put(board_cfg->owner);
 655                 }
 656         }
 657
 658         /* stop the lcdc */
 659         if (priv->started) {
 660                 sh_mobile_lcdc_start_stop(priv, 0);
 661                 priv->started = 0;
 662         }
 663
 664         /* stop clocks */
 665         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 666                 if (priv->ch[k].enabled)
 667                         sh_mobile_lcdc_clk_off(priv);
 668 }
 669
 670 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
 671 {
 672         int ifm, miftyp;
 673
 674         switch (ch->cfg.interface_type) {
 675         case RGB8: ifm = 0; miftyp = 0; break;
 676         case RGB9: ifm = 0; miftyp = 4; break;
 677         case RGB12A: ifm = 0; miftyp = 5; break;
 678         case RGB12B: ifm = 0; miftyp = 6; break;
 679         case RGB16: ifm = 0; miftyp = 7; break;
 680         case RGB18: ifm = 0; miftyp = 10; break;
 681         case RGB24: ifm = 0; miftyp = 11; break;
 682         case SYS8A: ifm = 1; miftyp = 0; break;
 683         case SYS8B: ifm = 1; miftyp = 1; break;
 684         case SYS8C: ifm = 1; miftyp = 2; break;
 685         case SYS8D: ifm = 1; miftyp = 3; break;
 686         case SYS9: ifm = 1; miftyp = 4; break;
 687         case SYS12: ifm = 1; miftyp = 5; break;
 688         case SYS16A: ifm = 1; miftyp = 7; break;
 689         case SYS16B: ifm = 1; miftyp = 8; break;
 690         case SYS16C: ifm = 1; miftyp = 9; break;
 691         case SYS18: ifm = 1; miftyp = 10; break;
 692         case SYS24: ifm = 1; miftyp = 11; break;
 693         default: goto bad;
 694         }
 695
 696         /* SUBLCD only supports SYS interface */
 697         if (lcdc_chan_is_sublcd(ch)) {
 698                 if (ifm == 0)
 699                         goto bad;
 700                 else
 701                         ifm = 0;
 702         }
 703
 704         ch->ldmt1r_value = (ifm << 12) | miftyp;
 705         return 0;
 706  bad:
 707         return -EINVAL;
 708 }
 709
 710 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
 711                                        int clock_source,
 712                                        struct sh_mobile_lcdc_priv *priv)
 713 {
 714         char *str;
 715         int icksel;
 716
 717         switch (clock_source) {
 718         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
 719         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
 720         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
 721         default:
 722                 return -EINVAL;
 723         }
 724
 725         priv->lddckr = icksel << 16;
 726
 727         if (str) {
 728                 priv->dot_clk = clk_get(&pdev->dev, str);
 729                 if (IS_ERR(priv->dot_clk)) {
 730                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
 731                         return PTR_ERR(priv->dot_clk);
 732                 }
 733         }
 734
 735         /* Runtime PM support involves two step for this driver:
 736          * 1) Enable Runtime PM
 737          * 2) Force Runtime PM Resume since hardware is accessed from probe()
 738          */
 739         priv->dev = &pdev->dev;
 740         pm_runtime_enable(priv->dev);
 741         pm_runtime_resume(priv->dev);
 742         return 0;
 743 }
 744
 745 static int sh_mobile_lcdc_setcolreg(u_int regno,
 746                                     u_int red, u_int green, u_int blue,
 747                                     u_int transp, struct fb_info *info)
 748 {
 749         u32 *palette = info->pseudo_palette;
 750
 751         if (regno >= PALETTE_NR)
 752                 return -EINVAL;
 753
 754         /* only FB_VISUAL_TRUECOLOR supported */
 755
 756         red >>= 16 - info->var.red.length;
 757         green >>= 16 - info->var.green.length;
 758         blue >>= 16 - info->var.blue.length;
 759         transp >>= 16 - info->var.transp.length;
 760
 761         palette[regno] = (red << info->var.red.offset) |
 762           (green << info->var.green.offset) |
 763           (blue << info->var.blue.offset) |
 764           (transp << info->var.transp.offset);
 765
 766         return 0;
 767 }
 768
 769 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
 770         .id =           "SH Mobile LCDC",
 771         .type =         FB_TYPE_PACKED_PIXELS,
 772         .visual =       FB_VISUAL_TRUECOLOR,
 773         .accel =        FB_ACCEL_NONE,
 774         .xpanstep =     0,
 775         .ypanstep =     1,
 776         .ywrapstep =    0,
 777 };
 778
 779 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
 780                                     const struct fb_fillrect *rect)
 781 {
 782         sys_fillrect(info, rect);
 783         sh_mobile_lcdc_deferred_io_touch(info);
 784 }
 785
 786 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
 787                                     const struct fb_copyarea *area)
 788 {
 789         sys_copyarea(info, area);
 790         sh_mobile_lcdc_deferred_io_touch(info);
 791 }
 792
 793 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
 794                                      const struct fb_image *image)
 795 {
 796         sys_imageblit(info, image);
 797         sh_mobile_lcdc_deferred_io_touch(info);
 798 }
 799
 800 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 801                                      struct fb_info *info)
 802 {
 803         struct sh_mobile_lcdc_chan *ch = info->par;
 804         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
 805         unsigned long ldrcntr;
 806         unsigned long new_pan_offset;
 807
 808         new_pan_offset = (var->yoffset * info->fix.line_length) +
 809                 (var->xoffset * (info->var.bits_per_pixel / 8));
 810
 811         if (new_pan_offset == ch->pan_offset)
 812                 return 0;       /* No change, do nothing */
 813
 814         ldrcntr = lcdc_read(priv, _LDRCNTR);
 815
 816         /* Set the source address for the next refresh */
 817         lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
 818         if (lcdc_chan_is_sublcd(ch))
 819                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
 820         else
 821                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
 822
 823         ch->pan_offset = new_pan_offset;
 824
 825         sh_mobile_lcdc_deferred_io_touch(info);
 826
 827         return 0;
 828 }
 829
 830 static int sh_mobile_wait_for_vsync(struct fb_info *info)
 831 {
 832         struct sh_mobile_lcdc_chan *ch = info->par;
 833         unsigned long ldintr;
 834         int ret;
 835
 836         /* Enable VSync End interrupt */
 837         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 838         ldintr |= LDINTR_VEE;
 839         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 840
 841         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 842                                                         msecs_to_jiffies(100));
 843         if (!ret)
 844                 return -ETIMEDOUT;
 845
 846         return 0;
 847 }
 848
 849 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
 850                        unsigned long arg)
 851 {
 852         int retval;
 853
 854         switch (cmd) {
 855         case FBIO_WAITFORVSYNC:
 856                 retval = sh_mobile_wait_for_vsync(info);
 857                 break;
 858
 859         default:
 860                 retval = -ENOIOCTLCMD;
 861                 break;
 862         }
 863         return retval;
 864 }
 865
 866 static void sh_mobile_fb_reconfig(struct fb_info *info)
 867 {
 868         struct sh_mobile_lcdc_chan *ch = info->par;
 869         struct fb_videomode mode1, mode2;
 870         struct fb_event event;
 871         int evnt = FB_EVENT_MODE_CHANGE_ALL;
 872
 873         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
 874                 /* More framebuffer users are active */
 875                 return;
 876
 877         fb_var_to_videomode(&mode1, &ch->display_var);
 878         fb_var_to_videomode(&mode2, &info->var);
 879
 880         if (fb_mode_is_equal(&mode1, &mode2))
 881                 return;
 882
 883         /* Display has been re-plugged, framebuffer is free now, reconfigure */
 884         if (fb_set_var(info, &ch->display_var) < 0)
 885                 /* Couldn't reconfigure, hopefully, can continue as before */
 886                 return;
 887
 888         info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
 889
 890         /*
 891          * fb_set_var() calls the notifier change internally, only if
 892          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
 893          * user event, we have to call the chain ourselves.
 894          */
 895         event.info = info;
 896         event.data = &mode1;
 897         fb_notifier_call_chain(evnt, &event);
 898 }
 899
 900 /*
 901  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
 902  * user == 1, or with console sem held, if user == 0.
 903  */
 904 static int sh_mobile_release(struct fb_info *info, int user)
 905 {
 906         struct sh_mobile_lcdc_chan *ch = info->par;
 907
 908         mutex_lock(&ch->open_lock);
 909         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
 910
 911         ch->use_count--;
 912
 913         /* Nothing to reconfigure, when called from fbcon */
 914         if (user) {
 915                 acquire_console_sem();
 916                 sh_mobile_fb_reconfig(info);
 917                 release_console_sem();
 918         }
 919
 920         mutex_unlock(&ch->open_lock);
 921
 922         return 0;
 923 }
 924
 925 static int sh_mobile_open(struct fb_info *info, int user)
 926 {
 927         struct sh_mobile_lcdc_chan *ch = info->par;
 928
 929         mutex_lock(&ch->open_lock);
 930         ch->use_count++;
 931
 932         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
 933         mutex_unlock(&ch->open_lock);
 934
 935         return 0;
 936 }
 937
 938 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 939 {
 940         struct sh_mobile_lcdc_chan *ch = info->par;
 941         struct sh_mobile_lcdc_priv *p = ch->lcdc;
 942
 943         if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
 944             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
 945                 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
 946                          var->left_margin, var->xres, var->right_margin, var->hsync_len,
 947                          var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
 948                          PICOS2KHZ(var->pixclock));
 949                 return -EINVAL;
 950         }
 951
 952         /* only accept the forced_bpp for dual channel configurations */
 953         if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
 954                 return -EINVAL;
 955
 956         switch (var->bits_per_pixel) {
 957         case 16: /* PKF[4:0] = 00011 - RGB 565 */
 958         case 24: /* PKF[4:0] = 01011 - RGB 888 */
 959         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
 960                 break;
 961         default:
 962                 return -EINVAL;
 963         }
 964
 965         return 0;
 966 }
 967
 968 static struct fb_ops sh_mobile_lcdc_ops = {
 969         .owner          = THIS_MODULE,
 970         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
 971         .fb_read        = fb_sys_read,
 972         .fb_write       = fb_sys_write,
 973         .fb_fillrect    = sh_mobile_lcdc_fillrect,
 974         .fb_copyarea    = sh_mobile_lcdc_copyarea,
 975         .fb_imageblit   = sh_mobile_lcdc_imageblit,
 976         .fb_pan_display = sh_mobile_fb_pan_display,
 977         .fb_ioctl       = sh_mobile_ioctl,
 978         .fb_open        = sh_mobile_open,
 979         .fb_release     = sh_mobile_release,
 980         .fb_check_var   = sh_mobile_check_var,
 981 };
 982
 983 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
 984 {
 985         switch (bpp) {
 986         case 16: /* PKF[4:0] = 00011 - RGB 565 */
 987                 var->red.offset = 11;
 988                 var->red.length = 5;
 989                 var->green.offset = 5;
 990                 var->green.length = 6;
 991                 var->blue.offset = 0;
 992                 var->blue.length = 5;
 993                 var->transp.offset = 0;
 994                 var->transp.length = 0;
 995                 break;
 996
 997         case 24: /* PKF[4:0] = 01011 - RGB 888 */
 998                 var->red.offset = 16;
 999                 var->red.length = 8;
1000                 var->green.offset = 8;
1001                 var->green.length = 8;
1002                 var->blue.offset = 0;
1003                 var->blue.length = 8;
1004                 var->transp.offset = 0;
1005                 var->transp.length = 0;
1006                 break;
1007
1008         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1009                 var->red.offset = 16;
1010                 var->red.length = 8;
1011                 var->green.offset = 8;
1012                 var->green.length = 8;
1013                 var->blue.offset = 0;
1014                 var->blue.length = 8;
1015                 var->transp.offset = 24;
1016                 var->transp.length = 8;
1017                 break;
1018         default:
1019                 return -EINVAL;
1020         }
1021         var->bits_per_pixel = bpp;
1022         var->red.msb_right = 0;
1023         var->green.msb_right = 0;
1024         var->blue.msb_right = 0;
1025         var->transp.msb_right = 0;
1026         return 0;
1027 }
1028
1029 static int sh_mobile_lcdc_suspend(struct device *dev)
1030 {
1031         struct platform_device *pdev = to_platform_device(dev);
1032
1033         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1034         return 0;
1035 }
1036
1037 static int sh_mobile_lcdc_resume(struct device *dev)
1038 {
1039         struct platform_device *pdev = to_platform_device(dev);
1040
1041         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1042 }
1043
1044 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1045 {
1046         struct platform_device *pdev = to_platform_device(dev);
1047         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1048         struct sh_mobile_lcdc_chan *ch;
1049         int k, n;
1050
1051         /* save per-channel registers */
1052         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1053                 ch = &p->ch[k];
1054                 if (!ch->enabled)
1055                         continue;
1056                 for (n = 0; n < NR_CH_REGS; n++)
1057                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1058         }
1059
1060         /* save shared registers */
1061         for (n = 0; n < NR_SHARED_REGS; n++)
1062                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1063
1064         /* turn off LCDC hardware */
1065         lcdc_write(p, _LDCNT1R, 0);
1066         return 0;
1067 }
1068
1069 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1070 {
1071         struct platform_device *pdev = to_platform_device(dev);
1072         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1073         struct sh_mobile_lcdc_chan *ch;
1074         int k, n;
1075
1076         /* restore per-channel registers */
1077         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1078                 ch = &p->ch[k];
1079                 if (!ch->enabled)
1080                         continue;
1081                 for (n = 0; n < NR_CH_REGS; n++)
1082                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1083         }
1084
1085         /* restore shared registers */
1086         for (n = 0; n < NR_SHARED_REGS; n++)
1087                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1088
1089         return 0;
1090 }
1091
1092 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1093         .suspend = sh_mobile_lcdc_suspend,
1094         .resume = sh_mobile_lcdc_resume,
1095         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1096         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1097 };
1098
1099 /* locking: called with info->lock held */
1100 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1101                                  unsigned long action, void *data)
1102 {
1103         struct fb_event *event = data;
1104         struct fb_info *info = event->info;
1105         struct sh_mobile_lcdc_chan *ch = info->par;
1106         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1107         int ret;
1108
1109         if (&ch->lcdc->notifier != nb)
1110                 return NOTIFY_DONE;
1111
1112         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1113                 __func__, action, event->data);
1114
1115         switch(action) {
1116         case FB_EVENT_SUSPEND:
1117                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
1118                         board_cfg->display_off(board_cfg->board_data);
1119                         module_put(board_cfg->owner);
1120                 }
1121                 pm_runtime_put(info->device);
1122                 sh_mobile_lcdc_stop(ch->lcdc);
1123                 break;
1124         case FB_EVENT_RESUME:
1125                 mutex_lock(&ch->open_lock);
1126                 sh_mobile_fb_reconfig(info);
1127                 mutex_unlock(&ch->open_lock);
1128
1129                 /* HDMI must be enabled before LCDC configuration */
1130                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
1131                         board_cfg->display_on(board_cfg->board_data, info);
1132                         module_put(board_cfg->owner);
1133                 }
1134
1135                 ret = sh_mobile_lcdc_start(ch->lcdc);
1136                 if (!ret)
1137                         pm_runtime_get_sync(info->device);
1138         }
1139
1140         return NOTIFY_OK;
1141 }
1142
1143 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1144
1145 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1146 {
1147         struct fb_info *info;
1148         struct sh_mobile_lcdc_priv *priv;
1149         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1150         struct resource *res;
1151         int error;
1152         void *buf;
1153         int i, j;
1154
1155         if (!pdata) {
1156                 dev_err(&pdev->dev, "no platform data defined\n");
1157                 return -EINVAL;
1158         }
1159
1160         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1161         i = platform_get_irq(pdev, 0);
1162         if (!res || i < 0) {
1163                 dev_err(&pdev->dev, "cannot get platform resources\n");
1164                 return -ENOENT;
1165         }
1166
1167         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1168         if (!priv) {
1169                 dev_err(&pdev->dev, "cannot allocate device data\n");
1170                 return -ENOMEM;
1171         }
1172
1173         platform_set_drvdata(pdev, priv);
1174
1175         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1176                             dev_name(&pdev->dev), priv);
1177         if (error) {
1178                 dev_err(&pdev->dev, "unable to request irq\n");
1179                 goto err1;
1180         }
1181
1182         priv->irq = i;
1183         atomic_set(&priv->hw_usecnt, -1);
1184
1185         j = 0;
1186         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1187                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1188
1189                 ch->lcdc = priv;
1190                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1191
1192                 error = sh_mobile_lcdc_check_interface(ch);
1193                 if (error) {
1194                         dev_err(&pdev->dev, "unsupported interface type\n");
1195                         goto err1;
1196                 }
1197                 init_waitqueue_head(&ch->frame_end_wait);
1198                 init_completion(&ch->vsync_completion);
1199                 ch->pan_offset = 0;
1200
1201                 switch (pdata->ch[i].chan) {
1202                 case LCDC_CHAN_MAINLCD:
1203                         ch->enabled = 1 << 1;
1204                         ch->reg_offs = lcdc_offs_mainlcd;
1205                         j++;
1206                         break;
1207                 case LCDC_CHAN_SUBLCD:
1208                         ch->enabled = 1 << 2;
1209                         ch->reg_offs = lcdc_offs_sublcd;
1210                         j++;
1211                         break;
1212                 }
1213         }
1214
1215         if (!j) {
1216                 dev_err(&pdev->dev, "no channels defined\n");
1217                 error = -EINVAL;
1218                 goto err1;
1219         }
1220
1221         /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1222         if (j == 2)
1223                 priv->forced_bpp = pdata->ch[0].bpp;
1224
1225         priv->base = ioremap_nocache(res->start, resource_size(res));
1226         if (!priv->base)
1227                 goto err1;
1228
1229         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1230         if (error) {
1231                 dev_err(&pdev->dev, "unable to setup clocks\n");
1232                 goto err1;
1233         }
1234
1235         for (i = 0; i < j; i++) {
1236                 struct fb_var_screeninfo *var;
1237                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1238                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1239                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1240                 const struct fb_videomode *mode = cfg->lcd_cfg;
1241                 unsigned long max_size = 0;
1242                 int k;
1243                 int num_cfg;
1244
1245                 ch->info = framebuffer_alloc(0, &pdev->dev);
1246                 if (!ch->info) {
1247                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1248                         error = -ENOMEM;
1249                         break;
1250                 }
1251
1252                 info = ch->info;
1253                 var = &info->var;
1254                 info->fbops = &sh_mobile_lcdc_ops;
1255                 info->par = ch;
1256
1257                 mutex_init(&ch->open_lock);
1258
1259                 for (k = 0, lcd_cfg = mode;
1260                      k < cfg->num_cfg && lcd_cfg;
1261                      k++, lcd_cfg++) {
1262                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1263
1264                         if (size > max_size) {
1265                                 max_cfg = lcd_cfg;
1266                                 max_size = size;
1267                         }
1268                 }
1269
1270                 if (!mode)
1271                         max_size = MAX_XRES * MAX_YRES;
1272                 else if (max_cfg)
1273                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1274                                 max_cfg->xres, max_cfg->yres);
1275
1276                 info->fix = sh_mobile_lcdc_fix;
1277                 info->fix.smem_len = max_size * (cfg->bpp / 8) * 2;
1278
1279                 if (!mode) {
1280                         mode = &default_720p;
1281                         num_cfg = 1;
1282                 } else {
1283                         num_cfg = ch->cfg.num_cfg;
1284                 }
1285
1286                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1287
1288                 fb_videomode_to_var(var, mode);
1289                 /* Default Y virtual resolution is 2x panel size */
1290                 var->yres_virtual = var->yres * 2;
1291                 var->activate = FB_ACTIVATE_NOW;
1292
1293                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp);
1294                 if (error)
1295                         break;
1296
1297                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1298                                          &ch->dma_handle, GFP_KERNEL);
1299                 if (!buf) {
1300                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1301                         error = -ENOMEM;
1302                         break;
1303                 }
1304
1305                 info->pseudo_palette = &ch->pseudo_palette;
1306                 info->flags = FBINFO_FLAG_DEFAULT;
1307
1308                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1309                 if (error < 0) {
1310                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1311                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1312                                           buf, ch->dma_handle);
1313                         break;
1314                 }
1315
1316                 info->fix.smem_start = ch->dma_handle;
1317                 info->fix.line_length = var->xres * (cfg->bpp / 8);
1318                 info->screen_base = buf;
1319                 info->device = &pdev->dev;
1320                 ch->display_var = *var;
1321         }
1322
1323         if (error)
1324                 goto err1;
1325
1326         error = sh_mobile_lcdc_start(priv);
1327         if (error) {
1328                 dev_err(&pdev->dev, "unable to start hardware\n");
1329                 goto err1;
1330         }
1331
1332         for (i = 0; i < j; i++) {
1333                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1334
1335                 info = ch->info;
1336
1337                 if (info->fbdefio) {
1338                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1339                                         info->fix.smem_len >> PAGE_SHIFT);
1340                         if (!ch->sglist) {
1341                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1342                                 goto err1;
1343                         }
1344                 }
1345
1346                 error = register_framebuffer(info);
1347                 if (error < 0)
1348                         goto err1;
1349
1350                 dev_info(info->dev,
1351                          "registered %s/%s as %dx%d %dbpp.\n",
1352                          pdev->name,
1353                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1354                          "mainlcd" : "sublcd",
1355                          info->var.xres, info->var.yres,
1356                          ch->cfg.bpp);
1357
1358                 /* deferred io mode: disable clock to save power */
1359                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1360                         sh_mobile_lcdc_clk_off(priv);
1361         }
1362
1363         /* Failure ignored */
1364         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1365         fb_register_client(&priv->notifier);
1366
1367         return 0;
1368 err1:
1369         sh_mobile_lcdc_remove(pdev);
1370
1371         return error;
1372 }
1373
1374 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1375 {
1376         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1377         struct fb_info *info;
1378         int i;
1379
1380         fb_unregister_client(&priv->notifier);
1381
1382         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1383                 if (priv->ch[i].info && priv->ch[i].info->dev)
1384                         unregister_framebuffer(priv->ch[i].info);
1385
1386         sh_mobile_lcdc_stop(priv);
1387
1388         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1389                 info = priv->ch[i].info;
1390
1391                 if (!info || !info->device)
1392                         continue;
1393
1394                 if (priv->ch[i].sglist)
1395                         vfree(priv->ch[i].sglist);
1396
1397                 if (info->screen_base)
1398                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1399                                           info->screen_base,
1400                                           priv->ch[i].dma_handle);
1401                 fb_dealloc_cmap(&info->cmap);
1402                 framebuffer_release(info);
1403         }
1404
1405         if (priv->dot_clk)
1406                 clk_put(priv->dot_clk);
1407
1408         if (priv->dev)
1409                 pm_runtime_disable(priv->dev);
1410
1411         if (priv->base)
1412                 iounmap(priv->base);
1413
1414         if (priv->irq)
1415                 free_irq(priv->irq, priv);
1416         kfree(priv);
1417         return 0;
1418 }
1419
1420 static struct platform_driver sh_mobile_lcdc_driver = {
1421         .driver         = {
1422                 .name           = "sh_mobile_lcdc_fb",
1423                 .owner          = THIS_MODULE,
1424                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1425         },
1426         .probe          = sh_mobile_lcdc_probe,
1427         .remove         = sh_mobile_lcdc_remove,
1428 };
1429
1430 static int __init sh_mobile_lcdc_init(void)
1431 {
1432         return platform_driver_register(&sh_mobile_lcdc_driver);
1433 }
1434
1435 static void __exit sh_mobile_lcdc_exit(void)
1436 {
1437         platform_driver_unregister(&sh_mobile_lcdc_driver);
1438 }
1439
1440 module_init(sh_mobile_lcdc_init);
1441 module_exit(sh_mobile_lcdc_exit);
1442
1443 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1444 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1445 MODULE_LICENSE("GPL v2");