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 DEFAULT_XRES 1280
  58 #define DEFAULT_YRES 1024
  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 };
 143
 144 static bool banked(int reg_nr)
 145 {
 146         switch (reg_nr) {
 147         case LDMT1R:
 148         case LDMT2R:
 149         case LDMT3R:
 150         case LDDFR:
 151         case LDSM1R:
 152         case LDSA1R:
 153         case LDMLSR:
 154         case LDHCNR:
 155         case LDHSYNR:
 156         case LDVLNR:
 157         case LDVSYNR:
 158                 return true;
 159         }
 160         return false;
 161 }
 162
 163 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 164                             int reg_nr, unsigned long data)
 165 {
 166         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 167         if (banked(reg_nr))
 168                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 169                           SIDE_B_OFFSET);
 170 }
 171
 172 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 173                             int reg_nr, unsigned long data)
 174 {
 175         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 176                   MIRROR_OFFSET);
 177 }
 178
 179 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 180                                     int reg_nr)
 181 {
 182         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 183 }
 184
 185 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 186                        unsigned long reg_offs, unsigned long data)
 187 {
 188         iowrite32(data, priv->base + reg_offs);
 189 }
 190
 191 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 192                                unsigned long reg_offs)
 193 {
 194         return ioread32(priv->base + reg_offs);
 195 }
 196
 197 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 198                           unsigned long reg_offs,
 199                           unsigned long mask, unsigned long until)
 200 {
 201         while ((lcdc_read(priv, reg_offs) & mask) != until)
 202                 cpu_relax();
 203 }
 204
 205 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 206 {
 207         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
 208 }
 209
 210 static void lcdc_sys_write_index(void *handle, unsigned long data)
 211 {
 212         struct sh_mobile_lcdc_chan *ch = handle;
 213
 214         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
 215         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 216         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 217         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 218 }
 219
 220 static void lcdc_sys_write_data(void *handle, unsigned long data)
 221 {
 222         struct sh_mobile_lcdc_chan *ch = handle;
 223
 224         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
 225         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 226         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 227         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 228 }
 229
 230 static unsigned long lcdc_sys_read_data(void *handle)
 231 {
 232         struct sh_mobile_lcdc_chan *ch = handle;
 233
 234         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
 235         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 236         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 237         udelay(1);
 238         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
 239
 240         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
 241 }
 242
 243 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 244         lcdc_sys_write_index,
 245         lcdc_sys_write_data,
 246         lcdc_sys_read_data,
 247 };
 248
 249 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 250 {
 251         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 252                 pm_runtime_get_sync(priv->dev);
 253                 if (priv->dot_clk)
 254                         clk_enable(priv->dot_clk);
 255         }
 256 }
 257
 258 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 259 {
 260         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 261                 if (priv->dot_clk)
 262                         clk_disable(priv->dot_clk);
 263                 pm_runtime_put(priv->dev);
 264         }
 265 }
 266
 267 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 268                                   struct list_head *pagelist)
 269 {
 270         struct sh_mobile_lcdc_chan *ch = info->par;
 271         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
 272         struct page *page;
 273         int nr_pages = 0;
 274
 275         sg_init_table(ch->sglist, nr_pages_max);
 276
 277         list_for_each_entry(page, pagelist, lru)
 278                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 279
 280         return nr_pages;
 281 }
 282
 283 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 284                                        struct list_head *pagelist)
 285 {
 286         struct sh_mobile_lcdc_chan *ch = info->par;
 287         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
 288
 289         /* enable clocks before accessing hardware */
 290         sh_mobile_lcdc_clk_on(ch->lcdc);
 291
 292         /*
 293          * It's possible to get here without anything on the pagelist via
 294          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 295          * invocation. In the former case, the acceleration routines are
 296          * stepped in to when using the framebuffer console causing the
 297          * workqueue to be scheduled without any dirty pages on the list.
 298          *
 299          * Despite this, a panel update is still needed given that the
 300          * acceleration routines have their own methods for writing in
 301          * that still need to be updated.
 302          *
 303          * The fsync() and empty pagelist case could be optimized for,
 304          * but we don't bother, as any application exhibiting such
 305          * behaviour is fundamentally broken anyways.
 306          */
 307         if (!list_empty(pagelist)) {
 308                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 309
 310                 /* trigger panel update */
 311                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 312                 if (bcfg->start_transfer)
 313                         bcfg->start_transfer(bcfg->board_data, ch,
 314                                              &sh_mobile_lcdc_sys_bus_ops);
 315                 lcdc_write_chan(ch, LDSM2R, 1);
 316                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 317         } else {
 318                 if (bcfg->start_transfer)
 319                         bcfg->start_transfer(bcfg->board_data, ch,
 320                                              &sh_mobile_lcdc_sys_bus_ops);
 321                 lcdc_write_chan(ch, LDSM2R, 1);
 322         }
 323 }
 324
 325 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 326 {
 327         struct fb_deferred_io *fbdefio = info->fbdefio;
 328
 329         if (fbdefio)
 330                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 331 }
 332
 333 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 334 {
 335         struct sh_mobile_lcdc_priv *priv = data;
 336         struct sh_mobile_lcdc_chan *ch;
 337         unsigned long tmp;
 338         unsigned long ldintr;
 339         int is_sub;
 340         int k;
 341
 342         /* acknowledge interrupt */
 343         ldintr = tmp = lcdc_read(priv, _LDINTR);
 344         /*
 345          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
 346          * write 0 to bits 0-6 to ack all triggered IRQs.
 347          */
 348         tmp &= 0xffffff00 & ~LDINTR_VEE;
 349         lcdc_write(priv, _LDINTR, tmp);
 350
 351         /* figure out if this interrupt is for main or sub lcd */
 352         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
 353
 354         /* wake up channel and disable clocks */
 355         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 356                 ch = &priv->ch[k];
 357
 358                 if (!ch->enabled)
 359                         continue;
 360
 361                 /* Frame Start */
 362                 if (ldintr & LDINTR_FS) {
 363                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 364                                 ch->frame_end = 1;
 365                                 wake_up(&ch->frame_end_wait);
 366
 367                                 sh_mobile_lcdc_clk_off(priv);
 368                         }
 369                 }
 370
 371                 /* VSYNC End */
 372                 if (ldintr & LDINTR_VES)
 373                         complete(&ch->vsync_completion);
 374         }
 375
 376         return IRQ_HANDLED;
 377 }
 378
 379 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 380                                       int start)
 381 {
 382         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 383         int k;
 384
 385         /* start or stop the lcdc */
 386         if (start)
 387                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
 388         else
 389                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
 390
 391         /* wait until power is applied/stopped on all channels */
 392         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 393                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 394                         while (1) {
 395                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
 396                                 if (start && tmp == 3)
 397                                         break;
 398                                 if (!start && tmp == 0)
 399                                         break;
 400                                 cpu_relax();
 401                         }
 402
 403         if (!start)
 404                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 405 }
 406
 407 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 408 {
 409         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
 410         unsigned long h_total, hsync_pos, display_h_total;
 411         u32 tmp;
 412
 413         tmp = ch->ldmt1r_value;
 414         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
 415         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
 416         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
 417         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
 418         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
 419         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
 420         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
 421         lcdc_write_chan(ch, LDMT1R, tmp);
 422
 423         /* setup SYS bus */
 424         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
 425         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
 426
 427         /* horizontal configuration */
 428         h_total = display_var->xres + display_var->hsync_len +
 429                 display_var->left_margin + display_var->right_margin;
 430         tmp = h_total / 8; /* HTCN */
 431         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
 432         lcdc_write_chan(ch, LDHCNR, tmp);
 433
 434         hsync_pos = display_var->xres + display_var->right_margin;
 435         tmp = hsync_pos / 8; /* HSYNP */
 436         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
 437         lcdc_write_chan(ch, LDHSYNR, tmp);
 438
 439         /* vertical configuration */
 440         tmp = display_var->yres + display_var->vsync_len +
 441                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
 442         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
 443         lcdc_write_chan(ch, LDVLNR, tmp);
 444
 445         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
 446         tmp |= display_var->vsync_len << 16; /* VSYNW */
 447         lcdc_write_chan(ch, LDVSYNR, tmp);
 448
 449         /* Adjust horizontal synchronisation for HDMI */
 450         display_h_total = display_var->xres + display_var->hsync_len +
 451                 display_var->left_margin + display_var->right_margin;
 452         tmp = ((display_var->xres & 7) << 24) |
 453                 ((display_h_total & 7) << 16) |
 454                 ((display_var->hsync_len & 7) << 8) |
 455                 hsync_pos;
 456         lcdc_write_chan(ch, LDHAJR, tmp);
 457 }
 458
 459 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 460 {
 461         struct sh_mobile_lcdc_chan *ch;
 462         struct sh_mobile_lcdc_board_cfg *board_cfg;
 463         unsigned long tmp;
 464         int k, m;
 465         int ret = 0;
 466
 467         /* enable clocks before accessing the hardware */
 468         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 469                 if (priv->ch[k].enabled)
 470                         sh_mobile_lcdc_clk_on(priv);
 471
 472         /* reset */
 473         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
 474         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
 475
 476         /* enable LCDC channels */
 477         tmp = lcdc_read(priv, _LDCNT2R);
 478         tmp |= priv->ch[0].enabled;
 479         tmp |= priv->ch[1].enabled;
 480         lcdc_write(priv, _LDCNT2R, tmp);
 481
 482         /* read data from external memory, avoid using the BEU for now */
 483         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
 484
 485         /* stop the lcdc first */
 486         sh_mobile_lcdc_start_stop(priv, 0);
 487
 488         /* configure clocks */
 489         tmp = priv->lddckr;
 490         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 491                 ch = &priv->ch[k];
 492
 493                 if (!priv->ch[k].enabled)
 494                         continue;
 495
 496                 m = ch->cfg.clock_divider;
 497                 if (!m)
 498                         continue;
 499
 500                 if (m == 1)
 501                         m = 1 << 6;
 502                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 503
 504                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
 505                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 506                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 507         }
 508
 509         lcdc_write(priv, _LDDCKR, tmp);
 510
 511         /* start dotclock again */
 512         lcdc_write(priv, _LDDCKSTPR, 0);
 513         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 514
 515         /* interrupts are disabled to begin with */
 516         lcdc_write(priv, _LDINTR, 0);
 517
 518         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 519                 ch = &priv->ch[k];
 520
 521                 if (!ch->enabled)
 522                         continue;
 523
 524                 sh_mobile_lcdc_geometry(ch);
 525
 526                 /* power supply */
 527                 lcdc_write_chan(ch, LDPMR, 0);
 528
 529                 board_cfg = &ch->cfg.board_cfg;
 530                 if (board_cfg->setup_sys)
 531                         ret = board_cfg->setup_sys(board_cfg->board_data, ch,
 532                                                    &sh_mobile_lcdc_sys_bus_ops);
 533                 if (ret)
 534                         return ret;
 535         }
 536
 537         /* word and long word swap */
 538         lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
 539
 540         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 541                 ch = &priv->ch[k];
 542
 543                 if (!priv->ch[k].enabled)
 544                         continue;
 545
 546                 /* set bpp format in PKF[4:0] */
 547                 tmp = lcdc_read_chan(ch, LDDFR);
 548                 tmp &= ~0x0001001f;
 549                 tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
 550                 lcdc_write_chan(ch, LDDFR, tmp);
 551
 552                 /* point out our frame buffer */
 553                 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
 554
 555                 /* set line size */
 556                 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
 557
 558                 /* setup deferred io if SYS bus */
 559                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
 560                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
 561                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
 562                         ch->defio.delay = msecs_to_jiffies(tmp);
 563                         ch->info->fbdefio = &ch->defio;
 564                         fb_deferred_io_init(ch->info);
 565
 566                         /* one-shot mode */
 567                         lcdc_write_chan(ch, LDSM1R, 1);
 568
 569                         /* enable "Frame End Interrupt Enable" bit */
 570                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 571
 572                 } else {
 573                         /* continuous read mode */
 574                         lcdc_write_chan(ch, LDSM1R, 0);
 575                 }
 576         }
 577
 578         /* display output */
 579         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
 580
 581         /* start the lcdc */
 582         sh_mobile_lcdc_start_stop(priv, 1);
 583         priv->started = 1;
 584
 585         /* tell the board code to enable the panel */
 586         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 587                 ch = &priv->ch[k];
 588                 if (!ch->enabled)
 589                         continue;
 590
 591                 board_cfg = &ch->cfg.board_cfg;
 592                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
 593                         board_cfg->display_on(board_cfg->board_data, ch->info);
 594                         module_put(board_cfg->owner);
 595                 }
 596         }
 597
 598         return 0;
 599 }
 600
 601 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 602 {
 603         struct sh_mobile_lcdc_chan *ch;
 604         struct sh_mobile_lcdc_board_cfg *board_cfg;
 605         int k;
 606
 607         /* clean up deferred io and ask board code to disable panel */
 608         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 609                 ch = &priv->ch[k];
 610                 if (!ch->enabled)
 611                         continue;
 612
 613                 /* deferred io mode:
 614                  * flush frame, and wait for frame end interrupt
 615                  * clean up deferred io and enable clock
 616                  */
 617                 if (ch->info && ch->info->fbdefio) {
 618                         ch->frame_end = 0;
 619                         schedule_delayed_work(&ch->info->deferred_work, 0);
 620                         wait_event(ch->frame_end_wait, ch->frame_end);
 621                         fb_deferred_io_cleanup(ch->info);
 622                         ch->info->fbdefio = NULL;
 623                         sh_mobile_lcdc_clk_on(priv);
 624                 }
 625
 626                 board_cfg = &ch->cfg.board_cfg;
 627                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
 628                         board_cfg->display_off(board_cfg->board_data);
 629                         module_put(board_cfg->owner);
 630                 }
 631         }
 632
 633         /* stop the lcdc */
 634         if (priv->started) {
 635                 sh_mobile_lcdc_start_stop(priv, 0);
 636                 priv->started = 0;
 637         }
 638
 639         /* stop clocks */
 640         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 641                 if (priv->ch[k].enabled)
 642                         sh_mobile_lcdc_clk_off(priv);
 643 }
 644
 645 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
 646 {
 647         int ifm, miftyp;
 648
 649         switch (ch->cfg.interface_type) {
 650         case RGB8: ifm = 0; miftyp = 0; break;
 651         case RGB9: ifm = 0; miftyp = 4; break;
 652         case RGB12A: ifm = 0; miftyp = 5; break;
 653         case RGB12B: ifm = 0; miftyp = 6; break;
 654         case RGB16: ifm = 0; miftyp = 7; break;
 655         case RGB18: ifm = 0; miftyp = 10; break;
 656         case RGB24: ifm = 0; miftyp = 11; break;
 657         case SYS8A: ifm = 1; miftyp = 0; break;
 658         case SYS8B: ifm = 1; miftyp = 1; break;
 659         case SYS8C: ifm = 1; miftyp = 2; break;
 660         case SYS8D: ifm = 1; miftyp = 3; break;
 661         case SYS9: ifm = 1; miftyp = 4; break;
 662         case SYS12: ifm = 1; miftyp = 5; break;
 663         case SYS16A: ifm = 1; miftyp = 7; break;
 664         case SYS16B: ifm = 1; miftyp = 8; break;
 665         case SYS16C: ifm = 1; miftyp = 9; break;
 666         case SYS18: ifm = 1; miftyp = 10; break;
 667         case SYS24: ifm = 1; miftyp = 11; break;
 668         default: goto bad;
 669         }
 670
 671         /* SUBLCD only supports SYS interface */
 672         if (lcdc_chan_is_sublcd(ch)) {
 673                 if (ifm == 0)
 674                         goto bad;
 675                 else
 676                         ifm = 0;
 677         }
 678
 679         ch->ldmt1r_value = (ifm << 12) | miftyp;
 680         return 0;
 681  bad:
 682         return -EINVAL;
 683 }
 684
 685 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
 686                                        int clock_source,
 687                                        struct sh_mobile_lcdc_priv *priv)
 688 {
 689         char *str;
 690         int icksel;
 691
 692         switch (clock_source) {
 693         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
 694         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
 695         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
 696         default:
 697                 return -EINVAL;
 698         }
 699
 700         priv->lddckr = icksel << 16;
 701
 702         if (str) {
 703                 priv->dot_clk = clk_get(&pdev->dev, str);
 704                 if (IS_ERR(priv->dot_clk)) {
 705                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
 706                         return PTR_ERR(priv->dot_clk);
 707                 }
 708         }
 709
 710         /* Runtime PM support involves two step for this driver:
 711          * 1) Enable Runtime PM
 712          * 2) Force Runtime PM Resume since hardware is accessed from probe()
 713          */
 714         priv->dev = &pdev->dev;
 715         pm_runtime_enable(priv->dev);
 716         pm_runtime_resume(priv->dev);
 717         return 0;
 718 }
 719
 720 static int sh_mobile_lcdc_setcolreg(u_int regno,
 721                                     u_int red, u_int green, u_int blue,
 722                                     u_int transp, struct fb_info *info)
 723 {
 724         u32 *palette = info->pseudo_palette;
 725
 726         if (regno >= PALETTE_NR)
 727                 return -EINVAL;
 728
 729         /* only FB_VISUAL_TRUECOLOR supported */
 730
 731         red >>= 16 - info->var.red.length;
 732         green >>= 16 - info->var.green.length;
 733         blue >>= 16 - info->var.blue.length;
 734         transp >>= 16 - info->var.transp.length;
 735
 736         palette[regno] = (red << info->var.red.offset) |
 737           (green << info->var.green.offset) |
 738           (blue << info->var.blue.offset) |
 739           (transp << info->var.transp.offset);
 740
 741         return 0;
 742 }
 743
 744 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
 745         .id =           "SH Mobile LCDC",
 746         .type =         FB_TYPE_PACKED_PIXELS,
 747         .visual =       FB_VISUAL_TRUECOLOR,
 748         .accel =        FB_ACCEL_NONE,
 749         .xpanstep =     0,
 750         .ypanstep =     1,
 751         .ywrapstep =    0,
 752 };
 753
 754 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
 755                                     const struct fb_fillrect *rect)
 756 {
 757         sys_fillrect(info, rect);
 758         sh_mobile_lcdc_deferred_io_touch(info);
 759 }
 760
 761 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
 762                                     const struct fb_copyarea *area)
 763 {
 764         sys_copyarea(info, area);
 765         sh_mobile_lcdc_deferred_io_touch(info);
 766 }
 767
 768 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
 769                                      const struct fb_image *image)
 770 {
 771         sys_imageblit(info, image);
 772         sh_mobile_lcdc_deferred_io_touch(info);
 773 }
 774
 775 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
 776                                      struct fb_info *info)
 777 {
 778         struct sh_mobile_lcdc_chan *ch = info->par;
 779         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
 780         unsigned long ldrcntr;
 781         unsigned long new_pan_offset;
 782
 783         new_pan_offset = (var->yoffset * info->fix.line_length) +
 784                 (var->xoffset * (info->var.bits_per_pixel / 8));
 785
 786         if (new_pan_offset == ch->pan_offset)
 787                 return 0;       /* No change, do nothing */
 788
 789         ldrcntr = lcdc_read(priv, _LDRCNTR);
 790
 791         /* Set the source address for the next refresh */
 792         lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
 793         if (lcdc_chan_is_sublcd(ch))
 794                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
 795         else
 796                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
 797
 798         ch->pan_offset = new_pan_offset;
 799
 800         sh_mobile_lcdc_deferred_io_touch(info);
 801
 802         return 0;
 803 }
 804
 805 static int sh_mobile_wait_for_vsync(struct fb_info *info)
 806 {
 807         struct sh_mobile_lcdc_chan *ch = info->par;
 808         unsigned long ldintr;
 809         int ret;
 810
 811         /* Enable VSync End interrupt */
 812         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 813         ldintr |= LDINTR_VEE;
 814         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 815
 816         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 817                                                         msecs_to_jiffies(100));
 818         if (!ret)
 819                 return -ETIMEDOUT;
 820
 821         return 0;
 822 }
 823
 824 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
 825                        unsigned long arg)
 826 {
 827         int retval;
 828
 829         switch (cmd) {
 830         case FBIO_WAITFORVSYNC:
 831                 retval = sh_mobile_wait_for_vsync(info);
 832                 break;
 833
 834         default:
 835                 retval = -ENOIOCTLCMD;
 836                 break;
 837         }
 838         return retval;
 839 }
 840
 841 static void sh_mobile_fb_reconfig(struct fb_info *info)
 842 {
 843         struct sh_mobile_lcdc_chan *ch = info->par;
 844         struct fb_videomode mode1, mode2;
 845         struct fb_event event;
 846         int evnt = FB_EVENT_MODE_CHANGE_ALL;
 847
 848         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
 849                 /* More framebuffer users are active */
 850                 return;
 851
 852         fb_var_to_videomode(&mode1, &ch->display_var);
 853         fb_var_to_videomode(&mode2, &info->var);
 854
 855         if (fb_mode_is_equal(&mode1, &mode2))
 856                 return;
 857
 858         /* Display has been re-plugged, framebuffer is free now, reconfigure */
 859         if (fb_set_var(info, &ch->display_var) < 0)
 860                 /* Couldn't reconfigure, hopefully, can continue as before */
 861                 return;
 862
 863         info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
 864
 865         /*
 866          * fb_set_var() calls the notifier change internally, only if
 867          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
 868          * user event, we have to call the chain ourselves.
 869          */
 870         event.info = info;
 871         event.data = &mode1;
 872         fb_notifier_call_chain(evnt, &event);
 873 }
 874
 875 /*
 876  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
 877  * user == 1, or with console sem held, if user == 0.
 878  */
 879 static int sh_mobile_release(struct fb_info *info, int user)
 880 {
 881         struct sh_mobile_lcdc_chan *ch = info->par;
 882
 883         mutex_lock(&ch->open_lock);
 884         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
 885
 886         ch->use_count--;
 887
 888         /* Nothing to reconfigure, when called from fbcon */
 889         if (user) {
 890                 acquire_console_sem();
 891                 sh_mobile_fb_reconfig(info);
 892                 release_console_sem();
 893         }
 894
 895         mutex_unlock(&ch->open_lock);
 896
 897         return 0;
 898 }
 899
 900 static int sh_mobile_open(struct fb_info *info, int user)
 901 {
 902         struct sh_mobile_lcdc_chan *ch = info->par;
 903
 904         mutex_lock(&ch->open_lock);
 905         ch->use_count++;
 906
 907         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
 908         mutex_unlock(&ch->open_lock);
 909
 910         return 0;
 911 }
 912
 913 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 914 {
 915         struct sh_mobile_lcdc_chan *ch = info->par;
 916
 917         if (var->xres < 160 || var->xres > 1920 ||
 918             var->yres < 120 || var->yres > 1080 ||
 919             var->left_margin < 32 || var->left_margin > 320 ||
 920             var->right_margin < 12 || var->right_margin > 240 ||
 921             var->upper_margin < 12 || var->upper_margin > 120 ||
 922             var->lower_margin < 1 || var->lower_margin > 64 ||
 923             var->hsync_len < 32 || var->hsync_len > 240 ||
 924             var->vsync_len < 2 || var->vsync_len > 64 ||
 925             var->pixclock < 6000 || var->pixclock > 40000 ||
 926             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
 927                 dev_warn(info->dev, "Invalid info: %u %u %u %u %u %u %u %u %u!\n",
 928                          var->xres, var->yres,
 929                          var->left_margin, var->right_margin,
 930                          var->upper_margin, var->lower_margin,
 931                          var->hsync_len, var->vsync_len,
 932                          var->pixclock);
 933                 return -EINVAL;
 934         }
 935         return 0;
 936 }
 937
 938 static struct fb_ops sh_mobile_lcdc_ops = {
 939         .owner          = THIS_MODULE,
 940         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
 941         .fb_read        = fb_sys_read,
 942         .fb_write       = fb_sys_write,
 943         .fb_fillrect    = sh_mobile_lcdc_fillrect,
 944         .fb_copyarea    = sh_mobile_lcdc_copyarea,
 945         .fb_imageblit   = sh_mobile_lcdc_imageblit,
 946         .fb_pan_display = sh_mobile_fb_pan_display,
 947         .fb_ioctl       = sh_mobile_ioctl,
 948         .fb_open        = sh_mobile_open,
 949         .fb_release     = sh_mobile_release,
 950         .fb_check_var   = sh_mobile_check_var,
 951 };
 952
 953 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
 954 {
 955         switch (bpp) {
 956         case 16: /* PKF[4:0] = 00011 - RGB 565 */
 957                 var->red.offset = 11;
 958                 var->red.length = 5;
 959                 var->green.offset = 5;
 960                 var->green.length = 6;
 961                 var->blue.offset = 0;
 962                 var->blue.length = 5;
 963                 var->transp.offset = 0;
 964                 var->transp.length = 0;
 965                 break;
 966
 967         case 32: /* PKF[4:0] = 00000 - RGB 888
 968                   * sh7722 pdf says 00RRGGBB but reality is GGBB00RR
 969                   * this may be because LDDDSR has word swap enabled..
 970                   */
 971                 var->red.offset = 0;
 972                 var->red.length = 8;
 973                 var->green.offset = 24;
 974                 var->green.length = 8;
 975                 var->blue.offset = 16;
 976                 var->blue.length = 8;
 977                 var->transp.offset = 0;
 978                 var->transp.length = 0;
 979                 break;
 980         default:
 981                 return -EINVAL;
 982         }
 983         var->bits_per_pixel = bpp;
 984         var->red.msb_right = 0;
 985         var->green.msb_right = 0;
 986         var->blue.msb_right = 0;
 987         var->transp.msb_right = 0;
 988         return 0;
 989 }
 990
 991 static int sh_mobile_lcdc_suspend(struct device *dev)
 992 {
 993         struct platform_device *pdev = to_platform_device(dev);
 994
 995         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
 996         return 0;
 997 }
 998
 999 static int sh_mobile_lcdc_resume(struct device *dev)
1000 {
1001         struct platform_device *pdev = to_platform_device(dev);
1002
1003         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1004 }
1005
1006 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1007 {
1008         struct platform_device *pdev = to_platform_device(dev);
1009         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1010         struct sh_mobile_lcdc_chan *ch;
1011         int k, n;
1012
1013         /* save per-channel registers */
1014         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1015                 ch = &p->ch[k];
1016                 if (!ch->enabled)
1017                         continue;
1018                 for (n = 0; n < NR_CH_REGS; n++)
1019                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1020         }
1021
1022         /* save shared registers */
1023         for (n = 0; n < NR_SHARED_REGS; n++)
1024                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1025
1026         /* turn off LCDC hardware */
1027         lcdc_write(p, _LDCNT1R, 0);
1028         return 0;
1029 }
1030
1031 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1032 {
1033         struct platform_device *pdev = to_platform_device(dev);
1034         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1035         struct sh_mobile_lcdc_chan *ch;
1036         int k, n;
1037
1038         /* restore per-channel registers */
1039         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1040                 ch = &p->ch[k];
1041                 if (!ch->enabled)
1042                         continue;
1043                 for (n = 0; n < NR_CH_REGS; n++)
1044                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1045         }
1046
1047         /* restore shared registers */
1048         for (n = 0; n < NR_SHARED_REGS; n++)
1049                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1050
1051         return 0;
1052 }
1053
1054 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1055         .suspend = sh_mobile_lcdc_suspend,
1056         .resume = sh_mobile_lcdc_resume,
1057         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1058         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1059 };
1060
1061 /* locking: called with info->lock held */
1062 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1063                                  unsigned long action, void *data)
1064 {
1065         struct fb_event *event = data;
1066         struct fb_info *info = event->info;
1067         struct sh_mobile_lcdc_chan *ch = info->par;
1068         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1069         int ret;
1070
1071         if (&ch->lcdc->notifier != nb)
1072                 return NOTIFY_DONE;
1073
1074         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1075                 __func__, action, event->data);
1076
1077         switch(action) {
1078         case FB_EVENT_SUSPEND:
1079                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
1080                         board_cfg->display_off(board_cfg->board_data);
1081                         module_put(board_cfg->owner);
1082                 }
1083                 pm_runtime_put(info->device);
1084                 sh_mobile_lcdc_stop(ch->lcdc);
1085                 break;
1086         case FB_EVENT_RESUME:
1087                 mutex_lock(&ch->open_lock);
1088                 sh_mobile_fb_reconfig(info);
1089                 mutex_unlock(&ch->open_lock);
1090
1091                 /* HDMI must be enabled before LCDC configuration */
1092                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
1093                         board_cfg->display_on(board_cfg->board_data, info);
1094                         module_put(board_cfg->owner);
1095                 }
1096
1097                 ret = sh_mobile_lcdc_start(ch->lcdc);
1098                 if (!ret)
1099                         pm_runtime_get_sync(info->device);
1100         }
1101
1102         return NOTIFY_OK;
1103 }
1104
1105 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1106
1107 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1108 {
1109         struct fb_info *info;
1110         struct sh_mobile_lcdc_priv *priv;
1111         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1112         struct resource *res;
1113         int error;
1114         void *buf;
1115         int i, j;
1116
1117         if (!pdata) {
1118                 dev_err(&pdev->dev, "no platform data defined\n");
1119                 return -EINVAL;
1120         }
1121
1122         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1123         i = platform_get_irq(pdev, 0);
1124         if (!res || i < 0) {
1125                 dev_err(&pdev->dev, "cannot get platform resources\n");
1126                 return -ENOENT;
1127         }
1128
1129         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1130         if (!priv) {
1131                 dev_err(&pdev->dev, "cannot allocate device data\n");
1132                 return -ENOMEM;
1133         }
1134
1135         platform_set_drvdata(pdev, priv);
1136
1137         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1138                             dev_name(&pdev->dev), priv);
1139         if (error) {
1140                 dev_err(&pdev->dev, "unable to request irq\n");
1141                 goto err1;
1142         }
1143
1144         priv->irq = i;
1145         atomic_set(&priv->hw_usecnt, -1);
1146
1147         j = 0;
1148         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1149                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1150
1151                 ch->lcdc = priv;
1152                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1153
1154                 error = sh_mobile_lcdc_check_interface(ch);
1155                 if (error) {
1156                         dev_err(&pdev->dev, "unsupported interface type\n");
1157                         goto err1;
1158                 }
1159                 init_waitqueue_head(&ch->frame_end_wait);
1160                 init_completion(&ch->vsync_completion);
1161                 ch->pan_offset = 0;
1162
1163                 switch (pdata->ch[i].chan) {
1164                 case LCDC_CHAN_MAINLCD:
1165                         ch->enabled = 1 << 1;
1166                         ch->reg_offs = lcdc_offs_mainlcd;
1167                         j++;
1168                         break;
1169                 case LCDC_CHAN_SUBLCD:
1170                         ch->enabled = 1 << 2;
1171                         ch->reg_offs = lcdc_offs_sublcd;
1172                         j++;
1173                         break;
1174                 }
1175         }
1176
1177         if (!j) {
1178                 dev_err(&pdev->dev, "no channels defined\n");
1179                 error = -EINVAL;
1180                 goto err1;
1181         }
1182
1183         priv->base = ioremap_nocache(res->start, resource_size(res));
1184         if (!priv->base)
1185                 goto err1;
1186
1187         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1188         if (error) {
1189                 dev_err(&pdev->dev, "unable to setup clocks\n");
1190                 goto err1;
1191         }
1192
1193         for (i = 0; i < j; i++) {
1194                 struct fb_var_screeninfo *var;
1195                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1196                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1197                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1198                 const struct fb_videomode *mode = cfg->lcd_cfg;
1199                 unsigned long max_size = 0;
1200                 int k;
1201                 int num_cfg;
1202
1203                 ch->info = framebuffer_alloc(0, &pdev->dev);
1204                 if (!ch->info) {
1205                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1206                         error = -ENOMEM;
1207                         break;
1208                 }
1209
1210                 info = ch->info;
1211                 var = &info->var;
1212                 info->fbops = &sh_mobile_lcdc_ops;
1213                 info->par = ch;
1214
1215                 mutex_init(&ch->open_lock);
1216
1217                 for (k = 0, lcd_cfg = mode;
1218                      k < cfg->num_cfg && lcd_cfg;
1219                      k++, lcd_cfg++) {
1220                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1221
1222                         if (size > max_size) {
1223                                 max_cfg = lcd_cfg;
1224                                 max_size = size;
1225                         }
1226                 }
1227
1228                 if (!mode)
1229                         max_size = DEFAULT_XRES * DEFAULT_YRES;
1230                 else if (max_cfg)
1231                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1232                                 max_cfg->xres, max_cfg->yres);
1233
1234                 info->fix = sh_mobile_lcdc_fix;
1235                 info->fix.smem_len = max_size * (cfg->bpp / 8) * 2;
1236
1237                 if (!mode) {
1238                         mode = &default_720p;
1239                         num_cfg = 1;
1240                 } else {
1241                         num_cfg = ch->cfg.num_cfg;
1242                 }
1243
1244                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1245
1246                 fb_videomode_to_var(var, mode);
1247                 /* Default Y virtual resolution is 2x panel size */
1248                 var->yres_virtual = var->yres * 2;
1249                 var->activate = FB_ACTIVATE_NOW;
1250
1251                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp);
1252                 if (error)
1253                         break;
1254
1255                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1256                                          &ch->dma_handle, GFP_KERNEL);
1257                 if (!buf) {
1258                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1259                         error = -ENOMEM;
1260                         break;
1261                 }
1262
1263                 info->pseudo_palette = &ch->pseudo_palette;
1264                 info->flags = FBINFO_FLAG_DEFAULT;
1265
1266                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1267                 if (error < 0) {
1268                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1269                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1270                                           buf, ch->dma_handle);
1271                         break;
1272                 }
1273
1274                 info->fix.smem_start = ch->dma_handle;
1275                 info->fix.line_length = var->xres * (cfg->bpp / 8);
1276                 info->screen_base = buf;
1277                 info->device = &pdev->dev;
1278                 ch->display_var = *var;
1279         }
1280
1281         if (error)
1282                 goto err1;
1283
1284         error = sh_mobile_lcdc_start(priv);
1285         if (error) {
1286                 dev_err(&pdev->dev, "unable to start hardware\n");
1287                 goto err1;
1288         }
1289
1290         for (i = 0; i < j; i++) {
1291                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1292
1293                 info = ch->info;
1294
1295                 if (info->fbdefio) {
1296                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1297                                         info->fix.smem_len >> PAGE_SHIFT);
1298                         if (!ch->sglist) {
1299                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1300                                 goto err1;
1301                         }
1302                 }
1303
1304                 error = register_framebuffer(info);
1305                 if (error < 0)
1306                         goto err1;
1307
1308                 dev_info(info->dev,
1309                          "registered %s/%s as %dx%d %dbpp.\n",
1310                          pdev->name,
1311                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1312                          "mainlcd" : "sublcd",
1313                          info->var.xres, info->var.yres,
1314                          ch->cfg.bpp);
1315
1316                 /* deferred io mode: disable clock to save power */
1317                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1318                         sh_mobile_lcdc_clk_off(priv);
1319         }
1320
1321         /* Failure ignored */
1322         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1323         fb_register_client(&priv->notifier);
1324
1325         return 0;
1326 err1:
1327         sh_mobile_lcdc_remove(pdev);
1328
1329         return error;
1330 }
1331
1332 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1333 {
1334         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1335         struct fb_info *info;
1336         int i;
1337
1338         fb_unregister_client(&priv->notifier);
1339
1340         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1341                 if (priv->ch[i].info && priv->ch[i].info->dev)
1342                         unregister_framebuffer(priv->ch[i].info);
1343
1344         sh_mobile_lcdc_stop(priv);
1345
1346         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1347                 info = priv->ch[i].info;
1348
1349                 if (!info || !info->device)
1350                         continue;
1351
1352                 if (priv->ch[i].sglist)
1353                         vfree(priv->ch[i].sglist);
1354
1355                 if (info->screen_base)
1356                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1357                                           info->screen_base,
1358                                           priv->ch[i].dma_handle);
1359                 fb_dealloc_cmap(&info->cmap);
1360                 framebuffer_release(info);
1361         }
1362
1363         if (priv->dot_clk)
1364                 clk_put(priv->dot_clk);
1365
1366         if (priv->dev)
1367                 pm_runtime_disable(priv->dev);
1368
1369         if (priv->base)
1370                 iounmap(priv->base);
1371
1372         if (priv->irq)
1373                 free_irq(priv->irq, priv);
1374         kfree(priv);
1375         return 0;
1376 }
1377
1378 static struct platform_driver sh_mobile_lcdc_driver = {
1379         .driver         = {
1380                 .name           = "sh_mobile_lcdc_fb",
1381                 .owner          = THIS_MODULE,
1382                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1383         },
1384         .probe          = sh_mobile_lcdc_probe,
1385         .remove         = sh_mobile_lcdc_remove,
1386 };
1387
1388 static int __init sh_mobile_lcdc_init(void)
1389 {
1390         return platform_driver_register(&sh_mobile_lcdc_driver);
1391 }
1392
1393 static void __exit sh_mobile_lcdc_exit(void)
1394 {
1395         platform_driver_unregister(&sh_mobile_lcdc_driver);
1396 }
1397
1398 module_init(sh_mobile_lcdc_init);
1399 module_exit(sh_mobile_lcdc_exit);
1400
1401 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1402 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1403 MODULE_LICENSE("GPL v2");