drivers/video/s1d13xxxfb.c

   1 /* drivers/video/s1d13xxxfb.c
   2  *
   3  * (c) 2004 Simtec Electronics
   4  * (c) 2005 Thibaut VARENE <varenet@parisc-linux.org>
   5  *
   6  * Driver for Epson S1D13xxx series framebuffer chips
   7  *
   8  * Adapted from
   9  *  linux/drivers/video/skeletonfb.c
  10  *  linux/drivers/video/epson1355fb.c
  11  *  linux/drivers/video/epson/s1d13xxxfb.c (2.4 driver by Epson)
  12  *
  13  * Note, currently only tested on S1D13806 with 16bit CRT.
  14  * As such, this driver might still contain some hardcoded bits relating to
  15  * S1D13806.
  16  * Making it work on other S1D13XXX chips should merely be a matter of adding
  17  * a few switch()s, some missing glue here and there maybe, and split header
  18  * files.
  19  *
  20  * TODO: - handle dual screen display (CRT and LCD at the same time).
  21  *       - check_var(), mode change, etc.
  22  *       - PM untested.
  23  *       - Accelerated interfaces.
  24  *       - Probably not SMP safe :)
  25  *
  26  * This file is subject to the terms and conditions of the GNU General Public
  27  * License. See the file COPYING in the main directory of this archive for
  28  * more details.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/delay.h>
  34
  35 #include <linux/types.h>
  36 #include <linux/errno.h>
  37 #include <linux/mm.h>
  38 #include <linux/mman.h>
  39 #include <linux/fb.h>
  40
  41 #include <asm/io.h>
  42
  43 #include <video/s1d13xxxfb.h>
  44
  45 #define PFX "s1d13xxxfb: "
  46
  47 #if 0
  48 #define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
  49 #else
  50 #define dbg(fmt, args...) do { } while (0)
  51 #endif
  52
  53 /*
  54  * Here we define the default struct fb_fix_screeninfo
  55  */
  56 static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
  57         .id             = S1D_FBID,
  58         .type           = FB_TYPE_PACKED_PIXELS,
  59         .visual         = FB_VISUAL_PSEUDOCOLOR,
  60         .xpanstep       = 0,
  61         .ypanstep       = 1,
  62         .ywrapstep      = 0,
  63         .accel          = FB_ACCEL_NONE,
  64 };
  65
  66 static inline u8
  67 s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
  68 {
  69 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
  70         regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
  71 #endif
  72         return readb(par->regs + regno);
  73 }
  74
  75 static inline void
  76 s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
  77 {
  78 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
  79         regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
  80 #endif
  81         writeb(value, par->regs + regno);
  82 }
  83
  84 static inline void
  85 s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
  86                         const struct s1d13xxxfb_regval *initregs,
  87                         const unsigned int size)
  88 {
  89         int i;
  90
  91         for (i = 0; i < size; i++) {
  92                 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
  93                                 (initregs[i].addr == S1DREG_DELAYON))
  94                         mdelay((int)initregs[i].value);
  95                 else {
  96                         s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
  97                 }
  98         }
  99
 100         /* make sure the hardware can cope with us */
 101         mdelay(1);
 102 }
 103
 104 static inline void
 105 lcd_enable(struct s1d13xxxfb_par *par, int enable)
 106 {
 107         u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 108
 109         if (enable)
 110                 mode |= 0x01;
 111         else
 112                 mode &= ~0x01;
 113
 114         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
 115 }
 116
 117 static inline void
 118 crt_enable(struct s1d13xxxfb_par *par, int enable)
 119 {
 120         u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 121
 122         if (enable)
 123                 mode |= 0x02;
 124         else
 125                 mode &= ~0x02;
 126
 127         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
 128 }
 129
 130 /* framebuffer control routines */
 131
 132 static inline void
 133 s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
 134 {
 135         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 136
 137         info->var.red.length = 4;
 138         info->var.green.length = 4;
 139         info->var.blue.length = 4;
 140 }
 141
 142 static inline void
 143 s1d13xxxfb_setup_truecolour(struct fb_info *info)
 144 {
 145         info->fix.visual = FB_VISUAL_TRUECOLOR;
 146         info->var.bits_per_pixel = 16;
 147
 148         info->var.red.length = 5;
 149         info->var.red.offset = 11;
 150
 151         info->var.green.length = 6;
 152         info->var.green.offset = 5;
 153
 154         info->var.blue.length = 5;
 155         info->var.blue.offset = 0;
 156 }
 157
 158 /**
 159  *      s1d13xxxfb_set_par - Alters the hardware state.
 160  *      @info: frame buffer structure
 161  *
 162  *      Using the fb_var_screeninfo in fb_info we set the depth of the
 163  *      framebuffer. This function alters the par AND the
 164  *      fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
 165  *      fb_info since we are using that data. This means we depend on the
 166  *      data in var inside fb_info to be supported by the hardware.
 167  *      xxxfb_check_var is always called before xxxfb_set_par to ensure this.
 168  *
 169  *      XXX TODO: write proper s1d13xxxfb_check_var(), without which that
 170  *      function is quite useless.
 171  */
 172 static int
 173 s1d13xxxfb_set_par(struct fb_info *info)
 174 {
 175         struct s1d13xxxfb_par *s1dfb = info->par;
 176         unsigned int val;
 177
 178         dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
 179
 180         if ((s1dfb->display & 0x01))    /* LCD */
 181                 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE);   /* read colour control */
 182         else    /* CRT */
 183                 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE);   /* read colour control */
 184
 185         val &= ~0x07;
 186
 187         switch (info->var.bits_per_pixel) {
 188                 case 4:
 189                         dbg("pseudo colour 4\n");
 190                         s1d13xxxfb_setup_pseudocolour(info);
 191                         val |= 2;
 192                         break;
 193                 case 8:
 194                         dbg("pseudo colour 8\n");
 195                         s1d13xxxfb_setup_pseudocolour(info);
 196                         val |= 3;
 197                         break;
 198                 case 16:
 199                         dbg("true colour\n");
 200                         s1d13xxxfb_setup_truecolour(info);
 201                         val |= 5;
 202                         break;
 203
 204                 default:
 205                         dbg("bpp not supported!\n");
 206                         return -EINVAL;
 207         }
 208
 209         dbg("writing %02x to display mode register\n", val);
 210
 211         if ((s1dfb->display & 0x01))    /* LCD */
 212                 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
 213         else    /* CRT */
 214                 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
 215
 216         info->fix.line_length  = info->var.xres * info->var.bits_per_pixel;
 217         info->fix.line_length /= 8;
 218
 219         dbg("setting line_length to %d\n", info->fix.line_length);
 220
 221         dbg("done setup\n");
 222
 223         return 0;
 224 }
 225
 226 /**
 227  *      s1d13xxxfb_setcolreg - sets a color register.
 228  *      @regno: Which register in the CLUT we are programming
 229  *      @red: The red value which can be up to 16 bits wide
 230  *      @green: The green value which can be up to 16 bits wide
 231  *      @blue:  The blue value which can be up to 16 bits wide.
 232  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 233  *      @info: frame buffer info structure
 234  *
 235  *      Returns negative errno on error, or zero on success.
 236  */
 237 static int
 238 s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 239                         u_int transp, struct fb_info *info)
 240 {
 241         struct s1d13xxxfb_par *s1dfb = info->par;
 242         unsigned int pseudo_val;
 243
 244         if (regno >= S1D_PALETTE_SIZE)
 245                 return -EINVAL;
 246
 247         dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
 248                     regno, red, green, blue, transp);
 249
 250         if (info->var.grayscale)
 251                 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
 252
 253         switch (info->fix.visual) {
 254                 case FB_VISUAL_TRUECOLOR:
 255                         if (regno >= 16)
 256                                 return -EINVAL;
 257
 258                         /* deal with creating pseudo-palette entries */
 259
 260                         pseudo_val  = (red   >> 11) << info->var.red.offset;
 261                         pseudo_val |= (green >> 10) << info->var.green.offset;
 262                         pseudo_val |= (blue  >> 11) << info->var.blue.offset;
 263
 264                         dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
 265                                     regno, pseudo_val);
 266
 267 #if defined(CONFIG_PLAT_MAPPI)
 268                         ((u32 *)info->pseudo_palette)[regno] = cpu_to_le16(pseudo_val);
 269 #else
 270                         ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
 271 #endif
 272
 273                         break;
 274                 case FB_VISUAL_PSEUDOCOLOR:
 275                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
 276                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
 277                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
 278                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
 279
 280                         break;
 281                 default:
 282                         return -ENOSYS;
 283         }
 284
 285         dbg("s1d13xxxfb_setcolreg: done\n");
 286
 287         return 0;
 288 }
 289
 290 /**
 291  *      s1d13xxxfb_blank - blanks the display.
 292  *      @blank_mode: the blank mode we want.
 293  *      @info: frame buffer structure that represents a single frame buffer
 294  *
 295  *      Blank the screen if blank_mode != 0, else unblank. Return 0 if
 296  *      blanking succeeded, != 0 if un-/blanking failed due to e.g. a
 297  *      video mode which doesn't support it. Implements VESA suspend
 298  *      and powerdown modes on hardware that supports disabling hsync/vsync:
 299  *      blank_mode == 2: suspend vsync
 300  *      blank_mode == 3: suspend hsync
 301  *      blank_mode == 4: powerdown
 302  *
 303  *      Returns negative errno on error, or zero on success.
 304  */
 305 static int
 306 s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
 307 {
 308         struct s1d13xxxfb_par *par = info->par;
 309
 310         dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
 311
 312         switch (blank_mode) {
 313                 case FB_BLANK_UNBLANK:
 314                 case FB_BLANK_NORMAL:
 315                         if ((par->display & 0x01) != 0)
 316                                 lcd_enable(par, 1);
 317                         if ((par->display & 0x02) != 0)
 318                                 crt_enable(par, 1);
 319                         break;
 320                 case FB_BLANK_VSYNC_SUSPEND:
 321                 case FB_BLANK_HSYNC_SUSPEND:
 322                         break;
 323                 case FB_BLANK_POWERDOWN:
 324                         lcd_enable(par, 0);
 325                         crt_enable(par, 0);
 326                         break;
 327                 default:
 328                         return -EINVAL;
 329         }
 330
 331         /* let fbcon do a soft blank for us */
 332         return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
 333 }
 334
 335 /**
 336  *      s1d13xxxfb_pan_display - Pans the display.
 337  *      @var: frame buffer variable screen structure
 338  *      @info: frame buffer structure that represents a single frame buffer
 339  *
 340  *      Pan (or wrap, depending on the `vmode' field) the display using the
 341  *      `yoffset' field of the `var' structure (`xoffset'  not yet supported).
 342  *      If the values don't fit, return -EINVAL.
 343  *
 344  *      Returns negative errno on error, or zero on success.
 345  */
 346 static int
 347 s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 348 {
 349         struct s1d13xxxfb_par *par = info->par;
 350         u32 start;
 351
 352         if (var->xoffset != 0)  /* not yet ... */
 353                 return -EINVAL;
 354
 355         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 356                 return -EINVAL;
 357
 358         start = (info->fix.line_length >> 1) * var->yoffset;
 359
 360         if ((par->display & 0x01)) {
 361                 /* LCD */
 362                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
 363                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
 364                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
 365         } else {
 366                 /* CRT */
 367                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
 368                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
 369                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
 370         }
 371
 372         return 0;
 373 }
 374
 375
 376 /* framebuffer information structures */
 377
 378 static struct fb_ops s1d13xxxfb_fbops = {
 379         .owner          = THIS_MODULE,
 380         .fb_set_par     = s1d13xxxfb_set_par,
 381         .fb_setcolreg   = s1d13xxxfb_setcolreg,
 382         .fb_blank       = s1d13xxxfb_blank,
 383
 384         .fb_pan_display = s1d13xxxfb_pan_display,
 385
 386         /* to be replaced by any acceleration we can */
 387         .fb_fillrect    = cfb_fillrect,
 388         .fb_copyarea    = cfb_copyarea,
 389         .fb_imageblit   = cfb_imageblit,
 390 };
 391
 392 static int s1d13xxxfb_width_tab[2][4] __devinitdata = {
 393         {4, 8, 16, -1},
 394         {9, 12, 18, -1},
 395 };
 396
 397 /**
 398  *      s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
 399  *      hardware setup.
 400  *      @info: frame buffer structure
 401  *
 402  *      We setup the framebuffer structures according to the current
 403  *      hardware setup. On some machines, the BIOS will have filled
 404  *      the chip registers with such info, on others, these values will
 405  *      have been written in some init procedure. In any case, the
 406  *      software values needs to match the hardware ones. This is what
 407  *      this function ensures.
 408  *
 409  *      Note: some of the hardcoded values here might need some love to
 410  *      work on various chips, and might need to no longer be hardcoded.
 411  */
 412 static void __devinit
 413 s1d13xxxfb_fetch_hw_state(struct fb_info *info)
 414 {
 415         struct fb_var_screeninfo *var = &info->var;
 416         struct fb_fix_screeninfo *fix = &info->fix;
 417         struct s1d13xxxfb_par *par = info->par;
 418         u8 panel, display;
 419         u16 offset;
 420         u32 xres, yres;
 421         u32 xres_virtual, yres_virtual;
 422         int bpp, lcd_bpp;
 423         int is_color, is_dual, is_tft;
 424         int lcd_enabled, crt_enabled;
 425
 426         fix->type = FB_TYPE_PACKED_PIXELS;
 427
 428         /* general info */
 429         par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 430         crt_enabled = (par->display & 0x02) != 0;
 431         lcd_enabled = (par->display & 0x01) != 0;
 432
 433         if (lcd_enabled && crt_enabled)
 434                 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
 435
 436         if (lcd_enabled)
 437                 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
 438         else    /* CRT */
 439                 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
 440
 441         bpp = display & 0x07;
 442
 443         switch (bpp) {
 444                 case 2: /* 4 bpp */
 445                 case 3: /* 8 bpp */
 446                         var->bits_per_pixel = 8;
 447                         var->red.offset = var->green.offset = var->blue.offset = 0;
 448                         var->red.length = var->green.length = var->blue.length = 8;
 449                         break;
 450                 case 5: /* 16 bpp */
 451                         s1d13xxxfb_setup_truecolour(info);
 452                         break;
 453                 default:
 454                         dbg("bpp: %i\n", bpp);
 455         }
 456         fb_alloc_cmap(&info->cmap, 256, 0);
 457
 458         /* LCD info */
 459         panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
 460         is_color = (panel & 0x04) != 0;
 461         is_dual = (panel & 0x02) != 0;
 462         is_tft = (panel & 0x01) != 0;
 463         lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
 464
 465         if (lcd_enabled) {
 466                 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
 467                 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
 468                         ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
 469
 470                 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
 471                         ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
 472         } else { /* crt */
 473                 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
 474                 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
 475                         ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
 476
 477                 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
 478                         ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
 479         }
 480         xres_virtual = offset * 16 / var->bits_per_pixel;
 481         yres_virtual = fix->smem_len / (offset * 2);
 482
 483         var->xres               = xres;
 484         var->yres               = yres;
 485         var->xres_virtual       = xres_virtual;
 486         var->yres_virtual       = yres_virtual;
 487         var->xoffset            = var->yoffset = 0;
 488
 489         fix->line_length        = offset * 2;
 490
 491         var->grayscale          = !is_color;
 492
 493         var->activate           = FB_ACTIVATE_NOW;
 494
 495         dbg(PFX "bpp=%d, lcd_bpp=%d, "
 496                 "crt_enabled=%d, lcd_enabled=%d\n",
 497                 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
 498         dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
 499                 "is_color=%d, is_dual=%d, is_tft=%d\n",
 500                 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
 501 }
 502
 503
 504 static int
 505 s1d13xxxfb_remove(struct platform_device *pdev)
 506 {
 507         struct fb_info *info = platform_get_drvdata(pdev);
 508         struct s1d13xxxfb_par *par = NULL;
 509
 510         if (info) {
 511                 par = info->par;
 512                 if (par && par->regs) {
 513                         /* disable output & enable powersave */
 514                         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
 515                         s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
 516                         iounmap(par->regs);
 517                 }
 518
 519                 fb_dealloc_cmap(&info->cmap);
 520
 521                 if (info->screen_base)
 522                         iounmap(info->screen_base);
 523
 524                 framebuffer_release(info);
 525         }
 526
 527         release_mem_region(pdev->resource[0].start,
 528                         pdev->resource[0].end - pdev->resource[0].start +1);
 529         release_mem_region(pdev->resource[1].start,
 530                         pdev->resource[1].end - pdev->resource[1].start +1);
 531         return 0;
 532 }
 533
 534 static int __devinit
 535 s1d13xxxfb_probe(struct platform_device *pdev)
 536 {
 537         struct s1d13xxxfb_par *default_par;
 538         struct fb_info *info;
 539         struct s1d13xxxfb_pdata *pdata = NULL;
 540         int ret = 0;
 541         u8 revision;
 542
 543         dbg("probe called: device is %p\n", dev);
 544
 545         printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
 546
 547         /* enable platform-dependent hardware glue, if any */
 548         if (pdev->dev.platform_data)
 549                 pdata = pdev->dev.platform_data;
 550
 551         if (pdata && pdata->platform_init_video)
 552                 pdata->platform_init_video();
 553
 554
 555         if (pdev->num_resources != 2) {
 556                 dev_err(&pdev->dev, "invalid num_resources: %i\n",
 557                        pdev->num_resources);
 558                 ret = -ENODEV;
 559                 goto bail;
 560         }
 561
 562         /* resource[0] is VRAM, resource[1] is registers */
 563         if (pdev->resource[0].flags != IORESOURCE_MEM
 564                         || pdev->resource[1].flags != IORESOURCE_MEM) {
 565                 dev_err(&pdev->dev, "invalid resource type\n");
 566                 ret = -ENODEV;
 567                 goto bail;
 568         }
 569
 570         if (!request_mem_region(pdev->resource[0].start,
 571                 pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
 572                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 573                 ret = -EBUSY;
 574                 goto bail;
 575         }
 576
 577         if (!request_mem_region(pdev->resource[1].start,
 578                 pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
 579                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 580                 ret = -EBUSY;
 581                 goto bail;
 582         }
 583
 584         info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
 585         if (!info) {
 586                 ret = -ENOMEM;
 587                 goto bail;
 588         }
 589
 590         platform_set_drvdata(pdev, info);
 591         default_par = info->par;
 592         default_par->regs = ioremap_nocache(pdev->resource[1].start,
 593                         pdev->resource[1].end - pdev->resource[1].start +1);
 594         if (!default_par->regs) {
 595                 printk(KERN_ERR PFX "unable to map registers\n");
 596                 ret = -ENOMEM;
 597                 goto bail;
 598         }
 599         info->pseudo_palette = default_par->pseudo_palette;
 600
 601         info->screen_base = ioremap_nocache(pdev->resource[0].start,
 602                         pdev->resource[0].end - pdev->resource[0].start +1);
 603
 604         if (!info->screen_base) {
 605                 printk(KERN_ERR PFX "unable to map framebuffer\n");
 606                 ret = -ENOMEM;
 607                 goto bail;
 608         }
 609
 610         revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE);
 611         if ((revision >> 2) != S1D_CHIP_REV) {
 612                 printk(KERN_INFO PFX "chip not found: %i\n", (revision >> 2));
 613                 ret = -ENODEV;
 614                 goto bail;
 615         }
 616
 617         info->fix = s1d13xxxfb_fix;
 618         info->fix.mmio_start = pdev->resource[1].start;
 619         info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start +1;
 620         info->fix.smem_start = pdev->resource[0].start;
 621         info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start +1;
 622
 623         printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
 624                default_par->regs, info->fix.smem_len / 1024, info->screen_base);
 625
 626         info->par = default_par;
 627         info->fbops = &s1d13xxxfb_fbops;
 628         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 629
 630         /* perform "manual" chip initialization, if needed */
 631         if (pdata && pdata->initregs)
 632                 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
 633
 634         s1d13xxxfb_fetch_hw_state(info);
 635
 636         if (register_framebuffer(info) < 0) {
 637                 ret = -EINVAL;
 638                 goto bail;
 639         }
 640
 641         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 642                info->node, info->fix.id);
 643
 644         return 0;
 645
 646 bail:
 647         s1d13xxxfb_remove(pdev);
 648         return ret;
 649
 650 }
 651
 652 #ifdef CONFIG_PM
 653 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
 654 {
 655         struct fb_info *info = platform_get_drvdata(dev);
 656         struct s1d13xxxfb_par *s1dfb = info->par;
 657         struct s1d13xxxfb_pdata *pdata = NULL;
 658
 659         /* disable display */
 660         lcd_enable(s1dfb, 0);
 661         crt_enable(s1dfb, 0);
 662
 663         if (dev->dev.platform_data)
 664                 pdata = dev->dev.platform_data;
 665
 666 #if 0
 667         if (!s1dfb->disp_save)
 668                 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
 669
 670         if (!s1dfb->disp_save) {
 671                 printk(KERN_ERR PFX "no memory to save screen");
 672                 return -ENOMEM;
 673         }
 674
 675         memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
 676 #else
 677         s1dfb->disp_save = NULL;
 678 #endif
 679
 680         if (!s1dfb->regs_save)
 681                 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
 682
 683         if (!s1dfb->regs_save) {
 684                 printk(KERN_ERR PFX "no memory to save registers");
 685                 return -ENOMEM;
 686         }
 687
 688         /* backup all registers */
 689         memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
 690
 691         /* now activate power save mode */
 692         s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
 693
 694         if (pdata && pdata->platform_suspend_video)
 695                 return pdata->platform_suspend_video();
 696         else
 697                 return 0;
 698 }
 699
 700 static int s1d13xxxfb_resume(struct platform_device *dev)
 701 {
 702         struct fb_info *info = platform_get_drvdata(dev);
 703         struct s1d13xxxfb_par *s1dfb = info->par;
 704         struct s1d13xxxfb_pdata *pdata = NULL;
 705
 706         /* awaken the chip */
 707         s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
 708
 709         /* do not let go until SDRAM "wakes up" */
 710         while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
 711                 udelay(10);
 712
 713         if (dev->dev.platform_data)
 714                 pdata = dev->dev.platform_data;
 715
 716         if (s1dfb->regs_save) {
 717                 /* will write RO regs, *should* get away with it :) */
 718                 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
 719                 kfree(s1dfb->regs_save);
 720         }
 721
 722         if (s1dfb->disp_save) {
 723                 memcpy_toio(info->screen_base, s1dfb->disp_save,
 724                                 info->fix.smem_len);
 725                 kfree(s1dfb->disp_save);        /* XXX kmalloc()'d when? */
 726         }
 727
 728         if ((s1dfb->display & 0x01) != 0)
 729                 lcd_enable(s1dfb, 1);
 730         if ((s1dfb->display & 0x02) != 0)
 731                 crt_enable(s1dfb, 1);
 732
 733         if (pdata && pdata->platform_resume_video)
 734                 return pdata->platform_resume_video();
 735         else
 736                 return 0;
 737 }
 738 #endif /* CONFIG_PM */
 739
 740 static struct platform_driver s1d13xxxfb_driver = {
 741         .probe          = s1d13xxxfb_probe,
 742         .remove         = s1d13xxxfb_remove,
 743 #ifdef CONFIG_PM
 744         .suspend        = s1d13xxxfb_suspend,
 745         .resume         = s1d13xxxfb_resume,
 746 #endif
 747         .driver         = {
 748                 .name   = S1D_DEVICENAME,
 749         },
 750 };
 751
 752
 753 static int __init
 754 s1d13xxxfb_init(void)
 755 {
 756         if (fb_get_options("s1d13xxxfb", NULL))
 757                 return -ENODEV;
 758
 759         return platform_driver_register(&s1d13xxxfb_driver);
 760 }
 761
 762
 763 static void __exit
 764 s1d13xxxfb_exit(void)
 765 {
 766         platform_driver_unregister(&s1d13xxxfb_driver);
 767 }
 768
 769 module_init(s1d13xxxfb_init);
 770 module_exit(s1d13xxxfb_exit);
 771
 772
 773 MODULE_LICENSE("GPL");
 774 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
 775 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");