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  * List of card production ids
  55  */
  56 static const int s1d13xxxfb_prod_ids[] = {
  57         S1D13505_PROD_ID,
  58         S1D13506_PROD_ID,
  59         S1D13806_PROD_ID,
  60 };
  61
  62 /*
  63  * List of card strings
  64  */
  65 static const char *s1d13xxxfb_prod_names[] = {
  66         "S1D13505",
  67         "S1D13506",
  68         "S1D13806",
  69 };
  70
  71 /*
  72  * Here we define the default struct fb_fix_screeninfo
  73  */
  74 static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
  75         .id             = S1D_FBID,
  76         .type           = FB_TYPE_PACKED_PIXELS,
  77         .visual         = FB_VISUAL_PSEUDOCOLOR,
  78         .xpanstep       = 0,
  79         .ypanstep       = 1,
  80         .ywrapstep      = 0,
  81         .accel          = FB_ACCEL_NONE,
  82 };
  83
  84 static inline u8
  85 s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
  86 {
  87 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
  88         regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
  89 #endif
  90         return readb(par->regs + regno);
  91 }
  92
  93 static inline void
  94 s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
  95 {
  96 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
  97         regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
  98 #endif
  99         writeb(value, par->regs + regno);
 100 }
 101
 102 static inline void
 103 s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
 104                         const struct s1d13xxxfb_regval *initregs,
 105                         const unsigned int size)
 106 {
 107         int i;
 108
 109         for (i = 0; i < size; i++) {
 110                 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
 111                                 (initregs[i].addr == S1DREG_DELAYON))
 112                         mdelay((int)initregs[i].value);
 113                 else {
 114                         s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
 115                 }
 116         }
 117
 118         /* make sure the hardware can cope with us */
 119         mdelay(1);
 120 }
 121
 122 static inline void
 123 lcd_enable(struct s1d13xxxfb_par *par, int enable)
 124 {
 125         u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 126
 127         if (enable)
 128                 mode |= 0x01;
 129         else
 130                 mode &= ~0x01;
 131
 132         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
 133 }
 134
 135 static inline void
 136 crt_enable(struct s1d13xxxfb_par *par, int enable)
 137 {
 138         u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 139
 140         if (enable)
 141                 mode |= 0x02;
 142         else
 143                 mode &= ~0x02;
 144
 145         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
 146 }
 147
 148 /* framebuffer control routines */
 149
 150 static inline void
 151 s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
 152 {
 153         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 154
 155         info->var.red.length = 4;
 156         info->var.green.length = 4;
 157         info->var.blue.length = 4;
 158 }
 159
 160 static inline void
 161 s1d13xxxfb_setup_truecolour(struct fb_info *info)
 162 {
 163         info->fix.visual = FB_VISUAL_TRUECOLOR;
 164         info->var.bits_per_pixel = 16;
 165
 166         info->var.red.length = 5;
 167         info->var.red.offset = 11;
 168
 169         info->var.green.length = 6;
 170         info->var.green.offset = 5;
 171
 172         info->var.blue.length = 5;
 173         info->var.blue.offset = 0;
 174 }
 175
 176 /**
 177  *      s1d13xxxfb_set_par - Alters the hardware state.
 178  *      @info: frame buffer structure
 179  *
 180  *      Using the fb_var_screeninfo in fb_info we set the depth of the
 181  *      framebuffer. This function alters the par AND the
 182  *      fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
 183  *      fb_info since we are using that data. This means we depend on the
 184  *      data in var inside fb_info to be supported by the hardware.
 185  *      xxxfb_check_var is always called before xxxfb_set_par to ensure this.
 186  *
 187  *      XXX TODO: write proper s1d13xxxfb_check_var(), without which that
 188  *      function is quite useless.
 189  */
 190 static int
 191 s1d13xxxfb_set_par(struct fb_info *info)
 192 {
 193         struct s1d13xxxfb_par *s1dfb = info->par;
 194         unsigned int val;
 195
 196         dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
 197
 198         if ((s1dfb->display & 0x01))    /* LCD */
 199                 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE);   /* read colour control */
 200         else    /* CRT */
 201                 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE);   /* read colour control */
 202
 203         val &= ~0x07;
 204
 205         switch (info->var.bits_per_pixel) {
 206                 case 4:
 207                         dbg("pseudo colour 4\n");
 208                         s1d13xxxfb_setup_pseudocolour(info);
 209                         val |= 2;
 210                         break;
 211                 case 8:
 212                         dbg("pseudo colour 8\n");
 213                         s1d13xxxfb_setup_pseudocolour(info);
 214                         val |= 3;
 215                         break;
 216                 case 16:
 217                         dbg("true colour\n");
 218                         s1d13xxxfb_setup_truecolour(info);
 219                         val |= 5;
 220                         break;
 221
 222                 default:
 223                         dbg("bpp not supported!\n");
 224                         return -EINVAL;
 225         }
 226
 227         dbg("writing %02x to display mode register\n", val);
 228
 229         if ((s1dfb->display & 0x01))    /* LCD */
 230                 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
 231         else    /* CRT */
 232                 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
 233
 234         info->fix.line_length  = info->var.xres * info->var.bits_per_pixel;
 235         info->fix.line_length /= 8;
 236
 237         dbg("setting line_length to %d\n", info->fix.line_length);
 238
 239         dbg("done setup\n");
 240
 241         return 0;
 242 }
 243
 244 /**
 245  *      s1d13xxxfb_setcolreg - sets a color register.
 246  *      @regno: Which register in the CLUT we are programming
 247  *      @red: The red value which can be up to 16 bits wide
 248  *      @green: The green value which can be up to 16 bits wide
 249  *      @blue:  The blue value which can be up to 16 bits wide.
 250  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 251  *      @info: frame buffer info structure
 252  *
 253  *      Returns negative errno on error, or zero on success.
 254  */
 255 static int
 256 s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 257                         u_int transp, struct fb_info *info)
 258 {
 259         struct s1d13xxxfb_par *s1dfb = info->par;
 260         unsigned int pseudo_val;
 261
 262         if (regno >= S1D_PALETTE_SIZE)
 263                 return -EINVAL;
 264
 265         dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
 266                     regno, red, green, blue, transp);
 267
 268         if (info->var.grayscale)
 269                 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
 270
 271         switch (info->fix.visual) {
 272                 case FB_VISUAL_TRUECOLOR:
 273                         if (regno >= 16)
 274                                 return -EINVAL;
 275
 276                         /* deal with creating pseudo-palette entries */
 277
 278                         pseudo_val  = (red   >> 11) << info->var.red.offset;
 279                         pseudo_val |= (green >> 10) << info->var.green.offset;
 280                         pseudo_val |= (blue  >> 11) << info->var.blue.offset;
 281
 282                         dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
 283                                     regno, pseudo_val);
 284
 285 #if defined(CONFIG_PLAT_MAPPI)
 286                         ((u32 *)info->pseudo_palette)[regno] = cpu_to_le16(pseudo_val);
 287 #else
 288                         ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
 289 #endif
 290
 291                         break;
 292                 case FB_VISUAL_PSEUDOCOLOR:
 293                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
 294                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
 295                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
 296                         s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
 297
 298                         break;
 299                 default:
 300                         return -ENOSYS;
 301         }
 302
 303         dbg("s1d13xxxfb_setcolreg: done\n");
 304
 305         return 0;
 306 }
 307
 308 /**
 309  *      s1d13xxxfb_blank - blanks the display.
 310  *      @blank_mode: the blank mode we want.
 311  *      @info: frame buffer structure that represents a single frame buffer
 312  *
 313  *      Blank the screen if blank_mode != 0, else unblank. Return 0 if
 314  *      blanking succeeded, != 0 if un-/blanking failed due to e.g. a
 315  *      video mode which doesn't support it. Implements VESA suspend
 316  *      and powerdown modes on hardware that supports disabling hsync/vsync:
 317  *      blank_mode == 2: suspend vsync
 318  *      blank_mode == 3: suspend hsync
 319  *      blank_mode == 4: powerdown
 320  *
 321  *      Returns negative errno on error, or zero on success.
 322  */
 323 static int
 324 s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
 325 {
 326         struct s1d13xxxfb_par *par = info->par;
 327
 328         dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
 329
 330         switch (blank_mode) {
 331                 case FB_BLANK_UNBLANK:
 332                 case FB_BLANK_NORMAL:
 333                         if ((par->display & 0x01) != 0)
 334                                 lcd_enable(par, 1);
 335                         if ((par->display & 0x02) != 0)
 336                                 crt_enable(par, 1);
 337                         break;
 338                 case FB_BLANK_VSYNC_SUSPEND:
 339                 case FB_BLANK_HSYNC_SUSPEND:
 340                         break;
 341                 case FB_BLANK_POWERDOWN:
 342                         lcd_enable(par, 0);
 343                         crt_enable(par, 0);
 344                         break;
 345                 default:
 346                         return -EINVAL;
 347         }
 348
 349         /* let fbcon do a soft blank for us */
 350         return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
 351 }
 352
 353 /**
 354  *      s1d13xxxfb_pan_display - Pans the display.
 355  *      @var: frame buffer variable screen structure
 356  *      @info: frame buffer structure that represents a single frame buffer
 357  *
 358  *      Pan (or wrap, depending on the `vmode' field) the display using the
 359  *      `yoffset' field of the `var' structure (`xoffset'  not yet supported).
 360  *      If the values don't fit, return -EINVAL.
 361  *
 362  *      Returns negative errno on error, or zero on success.
 363  */
 364 static int
 365 s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 366 {
 367         struct s1d13xxxfb_par *par = info->par;
 368         u32 start;
 369
 370         if (var->xoffset != 0)  /* not yet ... */
 371                 return -EINVAL;
 372
 373         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 374                 return -EINVAL;
 375
 376         start = (info->fix.line_length >> 1) * var->yoffset;
 377
 378         if ((par->display & 0x01)) {
 379                 /* LCD */
 380                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
 381                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
 382                 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
 383         } else {
 384                 /* CRT */
 385                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
 386                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
 387                 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
 388         }
 389
 390         return 0;
 391 }
 392
 393 /* framebuffer information structures */
 394
 395 static struct fb_ops s1d13xxxfb_fbops = {
 396         .owner          = THIS_MODULE,
 397         .fb_set_par     = s1d13xxxfb_set_par,
 398         .fb_setcolreg   = s1d13xxxfb_setcolreg,
 399         .fb_blank       = s1d13xxxfb_blank,
 400
 401         .fb_pan_display = s1d13xxxfb_pan_display,
 402
 403         /* to be replaced by any acceleration we can */
 404         .fb_fillrect    = cfb_fillrect,
 405         .fb_copyarea    = cfb_copyarea,
 406         .fb_imageblit   = cfb_imageblit,
 407 };
 408
 409 static int s1d13xxxfb_width_tab[2][4] __devinitdata = {
 410         {4, 8, 16, -1},
 411         {9, 12, 18, -1},
 412 };
 413
 414 /**
 415  *      s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
 416  *      hardware setup.
 417  *      @info: frame buffer structure
 418  *
 419  *      We setup the framebuffer structures according to the current
 420  *      hardware setup. On some machines, the BIOS will have filled
 421  *      the chip registers with such info, on others, these values will
 422  *      have been written in some init procedure. In any case, the
 423  *      software values needs to match the hardware ones. This is what
 424  *      this function ensures.
 425  *
 426  *      Note: some of the hardcoded values here might need some love to
 427  *      work on various chips, and might need to no longer be hardcoded.
 428  */
 429 static void __devinit
 430 s1d13xxxfb_fetch_hw_state(struct fb_info *info)
 431 {
 432         struct fb_var_screeninfo *var = &info->var;
 433         struct fb_fix_screeninfo *fix = &info->fix;
 434         struct s1d13xxxfb_par *par = info->par;
 435         u8 panel, display;
 436         u16 offset;
 437         u32 xres, yres;
 438         u32 xres_virtual, yres_virtual;
 439         int bpp, lcd_bpp;
 440         int is_color, is_dual, is_tft;
 441         int lcd_enabled, crt_enabled;
 442
 443         fix->type = FB_TYPE_PACKED_PIXELS;
 444
 445         /* general info */
 446         par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
 447         crt_enabled = (par->display & 0x02) != 0;
 448         lcd_enabled = (par->display & 0x01) != 0;
 449
 450         if (lcd_enabled && crt_enabled)
 451                 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
 452
 453         if (lcd_enabled)
 454                 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
 455         else    /* CRT */
 456                 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
 457
 458         bpp = display & 0x07;
 459
 460         switch (bpp) {
 461                 case 2: /* 4 bpp */
 462                 case 3: /* 8 bpp */
 463                         var->bits_per_pixel = 8;
 464                         var->red.offset = var->green.offset = var->blue.offset = 0;
 465                         var->red.length = var->green.length = var->blue.length = 8;
 466                         break;
 467                 case 5: /* 16 bpp */
 468                         s1d13xxxfb_setup_truecolour(info);
 469                         break;
 470                 default:
 471                         dbg("bpp: %i\n", bpp);
 472         }
 473         fb_alloc_cmap(&info->cmap, 256, 0);
 474
 475         /* LCD info */
 476         panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
 477         is_color = (panel & 0x04) != 0;
 478         is_dual = (panel & 0x02) != 0;
 479         is_tft = (panel & 0x01) != 0;
 480         lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
 481
 482         if (lcd_enabled) {
 483                 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
 484                 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
 485                         ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
 486
 487                 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
 488                         ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
 489         } else { /* crt */
 490                 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
 491                 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
 492                         ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
 493
 494                 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
 495                         ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
 496         }
 497         xres_virtual = offset * 16 / var->bits_per_pixel;
 498         yres_virtual = fix->smem_len / (offset * 2);
 499
 500         var->xres               = xres;
 501         var->yres               = yres;
 502         var->xres_virtual       = xres_virtual;
 503         var->yres_virtual       = yres_virtual;
 504         var->xoffset            = var->yoffset = 0;
 505
 506         fix->line_length        = offset * 2;
 507
 508         var->grayscale          = !is_color;
 509
 510         var->activate           = FB_ACTIVATE_NOW;
 511
 512         dbg(PFX "bpp=%d, lcd_bpp=%d, "
 513                 "crt_enabled=%d, lcd_enabled=%d\n",
 514                 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
 515         dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
 516                 "is_color=%d, is_dual=%d, is_tft=%d\n",
 517                 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
 518 }
 519
 520
 521 static int
 522 s1d13xxxfb_remove(struct platform_device *pdev)
 523 {
 524         struct fb_info *info = platform_get_drvdata(pdev);
 525         struct s1d13xxxfb_par *par = NULL;
 526
 527         if (info) {
 528                 par = info->par;
 529                 if (par && par->regs) {
 530                         /* disable output & enable powersave */
 531                         s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
 532                         s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
 533                         iounmap(par->regs);
 534                 }
 535
 536                 fb_dealloc_cmap(&info->cmap);
 537
 538                 if (info->screen_base)
 539                         iounmap(info->screen_base);
 540
 541                 framebuffer_release(info);
 542         }
 543
 544         release_mem_region(pdev->resource[0].start,
 545                         pdev->resource[0].end - pdev->resource[0].start +1);
 546         release_mem_region(pdev->resource[1].start,
 547                         pdev->resource[1].end - pdev->resource[1].start +1);
 548         return 0;
 549 }
 550
 551 static int __devinit
 552 s1d13xxxfb_probe(struct platform_device *pdev)
 553 {
 554         struct s1d13xxxfb_par *default_par;
 555         struct fb_info *info;
 556         struct s1d13xxxfb_pdata *pdata = NULL;
 557         int ret = 0;
 558         int i;
 559         u8 revision, prod_id;
 560
 561         dbg("probe called: device is %p\n", pdev);
 562
 563         printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
 564
 565         /* enable platform-dependent hardware glue, if any */
 566         if (pdev->dev.platform_data)
 567                 pdata = pdev->dev.platform_data;
 568
 569         if (pdata && pdata->platform_init_video)
 570                 pdata->platform_init_video();
 571
 572
 573         if (pdev->num_resources != 2) {
 574                 dev_err(&pdev->dev, "invalid num_resources: %i\n",
 575                        pdev->num_resources);
 576                 ret = -ENODEV;
 577                 goto bail;
 578         }
 579
 580         /* resource[0] is VRAM, resource[1] is registers */
 581         if (pdev->resource[0].flags != IORESOURCE_MEM
 582                         || pdev->resource[1].flags != IORESOURCE_MEM) {
 583                 dev_err(&pdev->dev, "invalid resource type\n");
 584                 ret = -ENODEV;
 585                 goto bail;
 586         }
 587
 588         if (!request_mem_region(pdev->resource[0].start,
 589                 pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
 590                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 591                 ret = -EBUSY;
 592                 goto bail;
 593         }
 594
 595         if (!request_mem_region(pdev->resource[1].start,
 596                 pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
 597                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 598                 ret = -EBUSY;
 599                 goto bail;
 600         }
 601
 602         info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
 603         if (!info) {
 604                 ret = -ENOMEM;
 605                 goto bail;
 606         }
 607
 608         platform_set_drvdata(pdev, info);
 609         default_par = info->par;
 610         default_par->regs = ioremap_nocache(pdev->resource[1].start,
 611                         pdev->resource[1].end - pdev->resource[1].start +1);
 612         if (!default_par->regs) {
 613                 printk(KERN_ERR PFX "unable to map registers\n");
 614                 ret = -ENOMEM;
 615                 goto bail;
 616         }
 617         info->pseudo_palette = default_par->pseudo_palette;
 618
 619         info->screen_base = ioremap_nocache(pdev->resource[0].start,
 620                         pdev->resource[0].end - pdev->resource[0].start +1);
 621
 622         if (!info->screen_base) {
 623                 printk(KERN_ERR PFX "unable to map framebuffer\n");
 624                 ret = -ENOMEM;
 625                 goto bail;
 626         }
 627
 628         /* production id is top 6 bits */
 629         prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
 630         /* revision id is lower 2 bits */
 631         revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
 632         ret = -ENODEV;
 633
 634         for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
 635                 if (prod_id == s1d13xxxfb_prod_ids[i]) {
 636                         /* looks like we got it in our list */
 637                         default_par->prod_id = prod_id;
 638                         default_par->revision = revision;
 639                         ret = 0;
 640                         break;
 641                 }
 642         }
 643
 644         if (!ret) {
 645                 printk(KERN_INFO PFX "chip production id %i = %s\n",
 646                         prod_id, s1d13xxxfb_prod_names[i]);
 647                 printk(KERN_INFO PFX "chip revision %i\n", revision);
 648         } else {
 649                 printk(KERN_INFO PFX
 650                         "unknown chip production id %i, revision %i\n",
 651                         prod_id, revision);
 652                 printk(KERN_INFO PFX "please contant maintainer\n");
 653                 goto bail;
 654         }
 655
 656         info->fix = s1d13xxxfb_fix;
 657         info->fix.mmio_start = pdev->resource[1].start;
 658         info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start +1;
 659         info->fix.smem_start = pdev->resource[0].start;
 660         info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start +1;
 661
 662         printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
 663                default_par->regs, info->fix.smem_len / 1024, info->screen_base);
 664
 665         info->par = default_par;
 666         info->fbops = &s1d13xxxfb_fbops;
 667         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 668
 669         /* perform "manual" chip initialization, if needed */
 670         if (pdata && pdata->initregs)
 671                 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
 672
 673         s1d13xxxfb_fetch_hw_state(info);
 674
 675         if (register_framebuffer(info) < 0) {
 676                 ret = -EINVAL;
 677                 goto bail;
 678         }
 679
 680         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 681                info->node, info->fix.id);
 682
 683         return 0;
 684
 685 bail:
 686         s1d13xxxfb_remove(pdev);
 687         return ret;
 688
 689 }
 690
 691 #ifdef CONFIG_PM
 692 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
 693 {
 694         struct fb_info *info = platform_get_drvdata(dev);
 695         struct s1d13xxxfb_par *s1dfb = info->par;
 696         struct s1d13xxxfb_pdata *pdata = NULL;
 697
 698         /* disable display */
 699         lcd_enable(s1dfb, 0);
 700         crt_enable(s1dfb, 0);
 701
 702         if (dev->dev.platform_data)
 703                 pdata = dev->dev.platform_data;
 704
 705 #if 0
 706         if (!s1dfb->disp_save)
 707                 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
 708
 709         if (!s1dfb->disp_save) {
 710                 printk(KERN_ERR PFX "no memory to save screen");
 711                 return -ENOMEM;
 712         }
 713
 714         memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
 715 #else
 716         s1dfb->disp_save = NULL;
 717 #endif
 718
 719         if (!s1dfb->regs_save)
 720                 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
 721
 722         if (!s1dfb->regs_save) {
 723                 printk(KERN_ERR PFX "no memory to save registers");
 724                 return -ENOMEM;
 725         }
 726
 727         /* backup all registers */
 728         memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
 729
 730         /* now activate power save mode */
 731         s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
 732
 733         if (pdata && pdata->platform_suspend_video)
 734                 return pdata->platform_suspend_video();
 735         else
 736                 return 0;
 737 }
 738
 739 static int s1d13xxxfb_resume(struct platform_device *dev)
 740 {
 741         struct fb_info *info = platform_get_drvdata(dev);
 742         struct s1d13xxxfb_par *s1dfb = info->par;
 743         struct s1d13xxxfb_pdata *pdata = NULL;
 744
 745         /* awaken the chip */
 746         s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
 747
 748         /* do not let go until SDRAM "wakes up" */
 749         while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
 750                 udelay(10);
 751
 752         if (dev->dev.platform_data)
 753                 pdata = dev->dev.platform_data;
 754
 755         if (s1dfb->regs_save) {
 756                 /* will write RO regs, *should* get away with it :) */
 757                 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
 758                 kfree(s1dfb->regs_save);
 759         }
 760
 761         if (s1dfb->disp_save) {
 762                 memcpy_toio(info->screen_base, s1dfb->disp_save,
 763                                 info->fix.smem_len);
 764                 kfree(s1dfb->disp_save);        /* XXX kmalloc()'d when? */
 765         }
 766
 767         if ((s1dfb->display & 0x01) != 0)
 768                 lcd_enable(s1dfb, 1);
 769         if ((s1dfb->display & 0x02) != 0)
 770                 crt_enable(s1dfb, 1);
 771
 772         if (pdata && pdata->platform_resume_video)
 773                 return pdata->platform_resume_video();
 774         else
 775                 return 0;
 776 }
 777 #endif /* CONFIG_PM */
 778
 779 static struct platform_driver s1d13xxxfb_driver = {
 780         .probe          = s1d13xxxfb_probe,
 781         .remove         = s1d13xxxfb_remove,
 782 #ifdef CONFIG_PM
 783         .suspend        = s1d13xxxfb_suspend,
 784         .resume         = s1d13xxxfb_resume,
 785 #endif
 786         .driver         = {
 787                 .name   = S1D_DEVICENAME,
 788         },
 789 };
 790
 791
 792 static int __init
 793 s1d13xxxfb_init(void)
 794 {
 795
 796 #ifndef MODULE
 797         if (fb_get_options("s1d13xxxfb", NULL))
 798                 return -ENODEV;
 799 #endif
 800
 801         return platform_driver_register(&s1d13xxxfb_driver);
 802 }
 803
 804
 805 static void __exit
 806 s1d13xxxfb_exit(void)
 807 {
 808         platform_driver_unregister(&s1d13xxxfb_driver);
 809 }
 810
 811 module_init(s1d13xxxfb_init);
 812 module_exit(s1d13xxxfb_exit);
 813
 814
 815 MODULE_LICENSE("GPL");
 816 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
 817 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");