drivers/video/fbdev/sm501fb.c

   1 /* linux/drivers/video/sm501fb.c
   2  *
   3  * Copyright (c) 2006 Simtec Electronics
   4  *      Vincent Sanders <vince@simtec.co.uk>
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Framebuffer driver for the Silicon Motion SM501
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/errno.h>
  17 #include <linux/string.h>
  18 #include <linux/mm.h>
  19 #include <linux/tty.h>
  20 #include <linux/slab.h>
  21 #include <linux/delay.h>
  22 #include <linux/fb.h>
  23 #include <linux/init.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/wait.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/clk.h>
  31 #include <linux/console.h>
  32 #include <linux/io.h>
  33
  34 #include <asm/uaccess.h>
  35 #include <asm/div64.h>
  36
  37 #ifdef CONFIG_PM
  38 #include <linux/pm.h>
  39 #endif
  40
  41 #include <linux/sm501.h>
  42 #include <linux/sm501-regs.h>
  43
  44 #include "edid.h"
  45
  46 static char *fb_mode = "640x480-16@60";
  47 static unsigned long default_bpp = 16;
  48
  49 static struct fb_videomode sm501_default_mode = {
  50         .refresh        = 60,
  51         .xres           = 640,
  52         .yres           = 480,
  53         .pixclock       = 20833,
  54         .left_margin    = 142,
  55         .right_margin   = 13,
  56         .upper_margin   = 21,
  57         .lower_margin   = 1,
  58         .hsync_len      = 69,
  59         .vsync_len      = 3,
  60         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  61         .vmode          = FB_VMODE_NONINTERLACED
  62 };
  63
  64 #define NR_PALETTE      256
  65
  66 enum sm501_controller {
  67         HEAD_CRT        = 0,
  68         HEAD_PANEL      = 1,
  69 };
  70
  71 /* SM501 memory address.
  72  *
  73  * This structure is used to track memory usage within the SM501 framebuffer
  74  * allocation. The sm_addr field is stored as an offset as it is often used
  75  * against both the physical and mapped addresses.
  76  */
  77 struct sm501_mem {
  78         unsigned long    size;
  79         unsigned long    sm_addr;       /* offset from base of sm501 fb. */
  80         void __iomem    *k_addr;
  81 };
  82
  83 /* private data that is shared between all frambuffers* */
  84 struct sm501fb_info {
  85         struct device           *dev;
  86         struct fb_info          *fb[2];         /* fb info for both heads */
  87         struct resource         *fbmem_res;     /* framebuffer resource */
  88         struct resource         *regs_res;      /* registers resource */
  89         struct resource         *regs2d_res;    /* 2d registers resource */
  90         struct sm501_platdata_fb *pdata;        /* our platform data */
  91
  92         unsigned long            pm_crt_ctrl;   /* pm: crt ctrl save */
  93
  94         int                      irq;
  95         int                      swap_endian;   /* set to swap rgb=>bgr */
  96         void __iomem            *regs;          /* remapped registers */
  97         void __iomem            *regs2d;        /* 2d remapped registers */
  98         void __iomem            *fbmem;         /* remapped framebuffer */
  99         size_t                   fbmem_len;     /* length of remapped region */
 100         u8 *edid_data;
 101 };
 102
 103 /* per-framebuffer private data */
 104 struct sm501fb_par {
 105         u32                      pseudo_palette[16];
 106
 107         enum sm501_controller    head;
 108         struct sm501_mem         cursor;
 109         struct sm501_mem         screen;
 110         struct fb_ops            ops;
 111
 112         void                    *store_fb;
 113         void                    *store_cursor;
 114         void __iomem            *cursor_regs;
 115         struct sm501fb_info     *info;
 116 };
 117
 118 /* Helper functions */
 119
 120 static inline int h_total(struct fb_var_screeninfo *var)
 121 {
 122         return var->xres + var->left_margin +
 123                 var->right_margin + var->hsync_len;
 124 }
 125
 126 static inline int v_total(struct fb_var_screeninfo *var)
 127 {
 128         return var->yres + var->upper_margin +
 129                 var->lower_margin + var->vsync_len;
 130 }
 131
 132 /* sm501fb_sync_regs()
 133  *
 134  * This call is mainly for PCI bus systems where we need to
 135  * ensure that any writes to the bus are completed before the
 136  * next phase, or after completing a function.
 137 */
 138
 139 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
 140 {
 141         smc501_readl(info->regs);
 142 }
 143
 144 /* sm501_alloc_mem
 145  *
 146  * This is an attempt to lay out memory for the two framebuffers and
 147  * everything else
 148  *
 149  * |fbmem_res->start                                           fbmem_res->end|
 150  * |                                                                         |
 151  * |fb[0].fix.smem_start    |         |fb[1].fix.smem_start    |     2K      |
 152  * |-> fb[0].fix.smem_len <-| spare   |-> fb[1].fix.smem_len <-|-> cursors <-|
 153  *
 154  * The "spare" space is for the 2d engine data
 155  * the fixed is space for the cursors (2x1Kbyte)
 156  *
 157  * we need to allocate memory for the 2D acceleration engine
 158  * command list and the data for the engine to deal with.
 159  *
 160  * - all allocations must be 128bit aligned
 161  * - cursors are 64x64x2 bits (1Kbyte)
 162  *
 163  */
 164
 165 #define SM501_MEMF_CURSOR               (1)
 166 #define SM501_MEMF_PANEL                (2)
 167 #define SM501_MEMF_CRT                  (4)
 168 #define SM501_MEMF_ACCEL                (8)
 169
 170 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
 171                            unsigned int why, size_t size, u32 smem_len)
 172 {
 173         struct sm501fb_par *par;
 174         struct fb_info *fbi;
 175         unsigned int ptr;
 176         unsigned int end;
 177
 178         switch (why) {
 179         case SM501_MEMF_CURSOR:
 180                 ptr = inf->fbmem_len - size;
 181                 inf->fbmem_len = ptr;   /* adjust available memory. */
 182                 break;
 183
 184         case SM501_MEMF_PANEL:
 185                 if (size > inf->fbmem_len)
 186                         return -ENOMEM;
 187
 188                 ptr = inf->fbmem_len - size;
 189                 fbi = inf->fb[HEAD_CRT];
 190
 191                 /* round down, some programs such as directfb do not draw
 192                  * 0,0 correctly unless the start is aligned to a page start.
 193                  */
 194
 195                 if (ptr > 0)
 196                         ptr &= ~(PAGE_SIZE - 1);
 197
 198                 if (fbi && ptr < smem_len)
 199                         return -ENOMEM;
 200
 201                 break;
 202
 203         case SM501_MEMF_CRT:
 204                 ptr = 0;
 205
 206                 /* check to see if we have panel memory allocated
 207                  * which would put an limit on available memory. */
 208
 209                 fbi = inf->fb[HEAD_PANEL];
 210                 if (fbi) {
 211                         par = fbi->par;
 212                         end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
 213                 } else
 214                         end = inf->fbmem_len;
 215
 216                 if ((ptr + size) > end)
 217                         return -ENOMEM;
 218
 219                 break;
 220
 221         case SM501_MEMF_ACCEL:
 222                 fbi = inf->fb[HEAD_CRT];
 223                 ptr = fbi ? smem_len : 0;
 224
 225                 fbi = inf->fb[HEAD_PANEL];
 226                 if (fbi) {
 227                         par = fbi->par;
 228                         end = par->screen.sm_addr;
 229                 } else
 230                         end = inf->fbmem_len;
 231
 232                 if ((ptr + size) > end)
 233                         return -ENOMEM;
 234
 235                 break;
 236
 237         default:
 238                 return -EINVAL;
 239         }
 240
 241         mem->size    = size;
 242         mem->sm_addr = ptr;
 243         mem->k_addr  = inf->fbmem + ptr;
 244
 245         dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
 246                 __func__, mem->sm_addr, mem->k_addr, why, size);
 247
 248         return 0;
 249 }
 250
 251 /* sm501fb_ps_to_hz
 252  *
 253  * Converts a period in picoseconds to Hz.
 254  *
 255  * Note, we try to keep this in Hz to minimise rounding with
 256  * the limited PLL settings on the SM501.
 257 */
 258
 259 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
 260 {
 261         unsigned long long numerator=1000000000000ULL;
 262
 263         /* 10^12 / picosecond period gives frequency in Hz */
 264         do_div(numerator, psvalue);
 265         return (unsigned long)numerator;
 266 }
 267
 268 /* sm501fb_hz_to_ps is identical to the opposite transform */
 269
 270 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
 271
 272 /* sm501fb_setup_gamma
 273  *
 274  * Programs a linear 1.0 gamma ramp in case the gamma
 275  * correction is enabled without programming anything else.
 276 */
 277
 278 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
 279                                 unsigned long palette)
 280 {
 281         unsigned long value = 0;
 282         int offset;
 283
 284         /* set gamma values */
 285         for (offset = 0; offset < 256 * 4; offset += 4) {
 286                 smc501_writel(value, fbi->regs + palette + offset);
 287                 value += 0x010101;      /* Advance RGB by 1,1,1.*/
 288         }
 289 }
 290
 291 /* sm501fb_check_var
 292  *
 293  * check common variables for both panel and crt
 294 */
 295
 296 static int sm501fb_check_var(struct fb_var_screeninfo *var,
 297                              struct fb_info *info)
 298 {
 299         struct sm501fb_par  *par = info->par;
 300         struct sm501fb_info *sm  = par->info;
 301         unsigned long tmp;
 302
 303         /* check we can fit these values into the registers */
 304
 305         if (var->hsync_len > 255 || var->vsync_len > 63)
 306                 return -EINVAL;
 307
 308         /* hdisplay end and hsync start */
 309         if ((var->xres + var->right_margin) > 4096)
 310                 return -EINVAL;
 311
 312         /* vdisplay end and vsync start */
 313         if ((var->yres + var->lower_margin) > 2048)
 314                 return -EINVAL;
 315
 316         /* hard limits of device */
 317
 318         if (h_total(var) > 4096 || v_total(var) > 2048)
 319                 return -EINVAL;
 320
 321         /* check our line length is going to be 128 bit aligned */
 322
 323         tmp = (var->xres * var->bits_per_pixel) / 8;
 324         if ((tmp & 15) != 0)
 325                 return -EINVAL;
 326
 327         /* check the virtual size */
 328
 329         if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
 330                 return -EINVAL;
 331
 332         /* can cope with 8,16 or 32bpp */
 333
 334         if (var->bits_per_pixel <= 8)
 335                 var->bits_per_pixel = 8;
 336         else if (var->bits_per_pixel <= 16)
 337                 var->bits_per_pixel = 16;
 338         else if (var->bits_per_pixel == 24)
 339                 var->bits_per_pixel = 32;
 340
 341         /* set r/g/b positions and validate bpp */
 342         switch(var->bits_per_pixel) {
 343         case 8:
 344                 var->red.length         = var->bits_per_pixel;
 345                 var->red.offset         = 0;
 346                 var->green.length       = var->bits_per_pixel;
 347                 var->green.offset       = 0;
 348                 var->blue.length        = var->bits_per_pixel;
 349                 var->blue.offset        = 0;
 350                 var->transp.length      = 0;
 351                 var->transp.offset      = 0;
 352
 353                 break;
 354
 355         case 16:
 356                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
 357                         var->blue.offset        = 11;
 358                         var->green.offset       = 5;
 359                         var->red.offset         = 0;
 360                 } else {
 361                         var->red.offset         = 11;
 362                         var->green.offset       = 5;
 363                         var->blue.offset        = 0;
 364                 }
 365                 var->transp.offset      = 0;
 366
 367                 var->red.length         = 5;
 368                 var->green.length       = 6;
 369                 var->blue.length        = 5;
 370                 var->transp.length      = 0;
 371                 break;
 372
 373         case 32:
 374                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
 375                         var->transp.offset      = 0;
 376                         var->red.offset         = 8;
 377                         var->green.offset       = 16;
 378                         var->blue.offset        = 24;
 379                 } else {
 380                         var->transp.offset      = 24;
 381                         var->red.offset         = 16;
 382                         var->green.offset       = 8;
 383                         var->blue.offset        = 0;
 384                 }
 385
 386                 var->red.length         = 8;
 387                 var->green.length       = 8;
 388                 var->blue.length        = 8;
 389                 var->transp.length      = 0;
 390                 break;
 391
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         return 0;
 397 }
 398
 399 /*
 400  * sm501fb_check_var_crt():
 401  *
 402  * check the parameters for the CRT head, and either bring them
 403  * back into range, or return -EINVAL.
 404 */
 405
 406 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
 407                                  struct fb_info *info)
 408 {
 409         return sm501fb_check_var(var, info);
 410 }
 411
 412 /* sm501fb_check_var_pnl():
 413  *
 414  * check the parameters for the CRT head, and either bring them
 415  * back into range, or return -EINVAL.
 416 */
 417
 418 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
 419                                  struct fb_info *info)
 420 {
 421         return sm501fb_check_var(var, info);
 422 }
 423
 424 /* sm501fb_set_par_common
 425  *
 426  * set common registers for framebuffers
 427 */
 428
 429 static int sm501fb_set_par_common(struct fb_info *info,
 430                                   struct fb_var_screeninfo *var)
 431 {
 432         struct sm501fb_par  *par = info->par;
 433         struct sm501fb_info *fbi = par->info;
 434         unsigned long pixclock;      /* pixelclock in Hz */
 435         unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
 436         unsigned int mem_type;
 437         unsigned int clock_type;
 438         unsigned int head_addr;
 439         unsigned int smem_len;
 440
 441         dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
 442                 __func__, var->xres, var->yres, var->bits_per_pixel,
 443                 var->xres_virtual, var->yres_virtual);
 444
 445         switch (par->head) {
 446         case HEAD_CRT:
 447                 mem_type = SM501_MEMF_CRT;
 448                 clock_type = SM501_CLOCK_V2XCLK;
 449                 head_addr = SM501_DC_CRT_FB_ADDR;
 450                 break;
 451
 452         case HEAD_PANEL:
 453                 mem_type = SM501_MEMF_PANEL;
 454                 clock_type = SM501_CLOCK_P2XCLK;
 455                 head_addr = SM501_DC_PANEL_FB_ADDR;
 456                 break;
 457
 458         default:
 459                 mem_type = 0;           /* stop compiler warnings */
 460                 head_addr = 0;
 461                 clock_type = 0;
 462         }
 463
 464         switch (var->bits_per_pixel) {
 465         case 8:
 466                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 467                 break;
 468
 469         case 16:
 470                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 471                 break;
 472
 473         case 32:
 474                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 475                 break;
 476         }
 477
 478         /* allocate fb memory within 501 */
 479         info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
 480         smem_len = info->fix.line_length * var->yres_virtual;
 481
 482         dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
 483                 info->fix.line_length);
 484
 485         if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
 486                 dev_err(fbi->dev, "no memory available\n");
 487                 return -ENOMEM;
 488         }
 489
 490         mutex_lock(&info->mm_lock);
 491         info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
 492         info->fix.smem_len   = smem_len;
 493         mutex_unlock(&info->mm_lock);
 494
 495         info->screen_base = fbi->fbmem + par->screen.sm_addr;
 496         info->screen_size = info->fix.smem_len;
 497
 498         /* set start of framebuffer to the screen */
 499
 500         smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
 501                         fbi->regs + head_addr);
 502
 503         /* program CRT clock  */
 504
 505         pixclock = sm501fb_ps_to_hz(var->pixclock);
 506
 507         sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
 508                                         pixclock);
 509
 510         /* update fb layer with actual clock used */
 511         var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
 512
 513         dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz)  = %lu, "
 514                "sm501pixclock = %lu,  error = %ld%%\n",
 515                __func__, var->pixclock, pixclock, sm501pixclock,
 516                ((pixclock - sm501pixclock)*100)/pixclock);
 517
 518         return 0;
 519 }
 520
 521 /* sm501fb_set_par_geometry
 522  *
 523  * set the geometry registers for specified framebuffer.
 524 */
 525
 526 static void sm501fb_set_par_geometry(struct fb_info *info,
 527                                      struct fb_var_screeninfo *var)
 528 {
 529         struct sm501fb_par  *par = info->par;
 530         struct sm501fb_info *fbi = par->info;
 531         void __iomem *base = fbi->regs;
 532         unsigned long reg;
 533
 534         if (par->head == HEAD_CRT)
 535                 base += SM501_DC_CRT_H_TOT;
 536         else
 537                 base += SM501_DC_PANEL_H_TOT;
 538
 539         /* set framebuffer width and display width */
 540
 541         reg = info->fix.line_length;
 542         reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
 543
 544         smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
 545                     SM501_DC_CRT_FB_OFFSET :  SM501_DC_PANEL_FB_OFFSET));
 546
 547         /* program horizontal total */
 548
 549         reg  = (h_total(var) - 1) << 16;
 550         reg |= (var->xres - 1);
 551
 552         smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
 553
 554         /* program horizontal sync */
 555
 556         reg  = var->hsync_len << 16;
 557         reg |= var->xres + var->right_margin - 1;
 558
 559         smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
 560
 561         /* program vertical total */
 562
 563         reg  = (v_total(var) - 1) << 16;
 564         reg |= (var->yres - 1);
 565
 566         smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
 567
 568         /* program vertical sync */
 569         reg  = var->vsync_len << 16;
 570         reg |= var->yres + var->lower_margin - 1;
 571
 572         smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
 573 }
 574
 575 /* sm501fb_pan_crt
 576  *
 577  * pan the CRT display output within an virtual framebuffer
 578 */
 579
 580 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
 581                            struct fb_info *info)
 582 {
 583         struct sm501fb_par  *par = info->par;
 584         struct sm501fb_info *fbi = par->info;
 585         unsigned int bytes_pixel = info->var.bits_per_pixel / 8;
 586         unsigned long reg;
 587         unsigned long xoffs;
 588
 589         xoffs = var->xoffset * bytes_pixel;
 590
 591         reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 592
 593         reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
 594         reg |= ((xoffs & 15) / bytes_pixel) << 4;
 595         smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
 596
 597         reg = (par->screen.sm_addr + xoffs +
 598                var->yoffset * info->fix.line_length);
 599         smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
 600
 601         sm501fb_sync_regs(fbi);
 602         return 0;
 603 }
 604
 605 /* sm501fb_pan_pnl
 606  *
 607  * pan the panel display output within an virtual framebuffer
 608 */
 609
 610 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
 611                            struct fb_info *info)
 612 {
 613         struct sm501fb_par  *par = info->par;
 614         struct sm501fb_info *fbi = par->info;
 615         unsigned long reg;
 616
 617         reg = var->xoffset | (info->var.xres_virtual << 16);
 618         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
 619
 620         reg = var->yoffset | (info->var.yres_virtual << 16);
 621         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
 622
 623         sm501fb_sync_regs(fbi);
 624         return 0;
 625 }
 626
 627 /* sm501fb_set_par_crt
 628  *
 629  * Set the CRT video mode from the fb_info structure
 630 */
 631
 632 static int sm501fb_set_par_crt(struct fb_info *info)
 633 {
 634         struct sm501fb_par  *par = info->par;
 635         struct sm501fb_info *fbi = par->info;
 636         struct fb_var_screeninfo *var = &info->var;
 637         unsigned long control;       /* control register */
 638         int ret;
 639
 640         /* activate new configuration */
 641
 642         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
 643
 644         /* enable CRT DAC - note 0 is on!*/
 645         sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
 646
 647         control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 648
 649         control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
 650                     SM501_DC_CRT_CONTROL_GAMMA |
 651                     SM501_DC_CRT_CONTROL_BLANK |
 652                     SM501_DC_CRT_CONTROL_SEL |
 653                     SM501_DC_CRT_CONTROL_CP |
 654                     SM501_DC_CRT_CONTROL_TVP);
 655
 656         /* set the sync polarities before we check data source  */
 657
 658         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
 659                 control |= SM501_DC_CRT_CONTROL_HSP;
 660
 661         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
 662                 control |= SM501_DC_CRT_CONTROL_VSP;
 663
 664         if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
 665                 /* the head is displaying panel data... */
 666
 667                 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
 668                                 info->fix.smem_len);
 669                 goto out_update;
 670         }
 671
 672         ret = sm501fb_set_par_common(info, var);
 673         if (ret) {
 674                 dev_err(fbi->dev, "failed to set common parameters\n");
 675                 return ret;
 676         }
 677
 678         sm501fb_pan_crt(var, info);
 679         sm501fb_set_par_geometry(info, var);
 680
 681         control |= SM501_FIFO_3;        /* fill if >3 free slots */
 682
 683         switch(var->bits_per_pixel) {
 684         case 8:
 685                 control |= SM501_DC_CRT_CONTROL_8BPP;
 686                 break;
 687
 688         case 16:
 689                 control |= SM501_DC_CRT_CONTROL_16BPP;
 690                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
 691                 break;
 692
 693         case 32:
 694                 control |= SM501_DC_CRT_CONTROL_32BPP;
 695                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
 696                 break;
 697
 698         default:
 699                 BUG();
 700         }
 701
 702         control |= SM501_DC_CRT_CONTROL_SEL;    /* CRT displays CRT data */
 703         control |= SM501_DC_CRT_CONTROL_TE;     /* enable CRT timing */
 704         control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
 705
 706  out_update:
 707         dev_dbg(fbi->dev, "new control is %08lx\n", control);
 708
 709         smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
 710         sm501fb_sync_regs(fbi);
 711
 712         return 0;
 713 }
 714
 715 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
 716 {
 717         unsigned long control;
 718         void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
 719         struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
 720
 721         control = smc501_readl(ctrl_reg);
 722
 723         if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
 724                 /* enable panel power */
 725
 726                 control |= SM501_DC_PANEL_CONTROL_VDD;  /* FPVDDEN */
 727                 smc501_writel(control, ctrl_reg);
 728                 sm501fb_sync_regs(fbi);
 729                 mdelay(10);
 730
 731                 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
 732                 smc501_writel(control, ctrl_reg);
 733                 sm501fb_sync_regs(fbi);
 734                 mdelay(10);
 735
 736                 /* VBIASEN */
 737
 738                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
 739                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
 740                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
 741                         else
 742                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
 743
 744                         smc501_writel(control, ctrl_reg);
 745                         sm501fb_sync_regs(fbi);
 746                         mdelay(10);
 747                 }
 748
 749                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
 750                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
 751                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
 752                         else
 753                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
 754
 755                         smc501_writel(control, ctrl_reg);
 756                         sm501fb_sync_regs(fbi);
 757                         mdelay(10);
 758                 }
 759         } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
 760                 /* disable panel power */
 761                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
 762                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
 763                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
 764                         else
 765                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
 766
 767                         smc501_writel(control, ctrl_reg);
 768                         sm501fb_sync_regs(fbi);
 769                         mdelay(10);
 770                 }
 771
 772                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
 773                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
 774                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
 775                         else
 776                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
 777
 778                         smc501_writel(control, ctrl_reg);
 779                         sm501fb_sync_regs(fbi);
 780                         mdelay(10);
 781                 }
 782
 783                 control &= ~SM501_DC_PANEL_CONTROL_DATA;
 784                 smc501_writel(control, ctrl_reg);
 785                 sm501fb_sync_regs(fbi);
 786                 mdelay(10);
 787
 788                 control &= ~SM501_DC_PANEL_CONTROL_VDD;
 789                 smc501_writel(control, ctrl_reg);
 790                 sm501fb_sync_regs(fbi);
 791                 mdelay(10);
 792         }
 793
 794         sm501fb_sync_regs(fbi);
 795 }
 796
 797 /* sm501fb_set_par_pnl
 798  *
 799  * Set the panel video mode from the fb_info structure
 800 */
 801
 802 static int sm501fb_set_par_pnl(struct fb_info *info)
 803 {
 804         struct sm501fb_par  *par = info->par;
 805         struct sm501fb_info *fbi = par->info;
 806         struct fb_var_screeninfo *var = &info->var;
 807         unsigned long control;
 808         unsigned long reg;
 809         int ret;
 810
 811         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
 812
 813         /* activate this new configuration */
 814
 815         ret = sm501fb_set_par_common(info, var);
 816         if (ret)
 817                 return ret;
 818
 819         sm501fb_pan_pnl(var, info);
 820         sm501fb_set_par_geometry(info, var);
 821
 822         /* update control register */
 823
 824         control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
 825         control &= (SM501_DC_PANEL_CONTROL_GAMMA |
 826                     SM501_DC_PANEL_CONTROL_VDD  |
 827                     SM501_DC_PANEL_CONTROL_DATA |
 828                     SM501_DC_PANEL_CONTROL_BIAS |
 829                     SM501_DC_PANEL_CONTROL_FPEN |
 830                     SM501_DC_PANEL_CONTROL_CP |
 831                     SM501_DC_PANEL_CONTROL_CK |
 832                     SM501_DC_PANEL_CONTROL_HP |
 833                     SM501_DC_PANEL_CONTROL_VP |
 834                     SM501_DC_PANEL_CONTROL_HPD |
 835                     SM501_DC_PANEL_CONTROL_VPD);
 836
 837         control |= SM501_FIFO_3;        /* fill if >3 free slots */
 838
 839         switch(var->bits_per_pixel) {
 840         case 8:
 841                 control |= SM501_DC_PANEL_CONTROL_8BPP;
 842                 break;
 843
 844         case 16:
 845                 control |= SM501_DC_PANEL_CONTROL_16BPP;
 846                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
 847                 break;
 848
 849         case 32:
 850                 control |= SM501_DC_PANEL_CONTROL_32BPP;
 851                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
 852                 break;
 853
 854         default:
 855                 BUG();
 856         }
 857
 858         smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
 859
 860         /* panel plane top left and bottom right location */
 861
 862         smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
 863
 864         reg  = var->xres - 1;
 865         reg |= (var->yres - 1) << 16;
 866
 867         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
 868
 869         /* program panel control register */
 870
 871         control |= SM501_DC_PANEL_CONTROL_TE;   /* enable PANEL timing */
 872         control |= SM501_DC_PANEL_CONTROL_EN;   /* enable PANEL gfx plane */
 873
 874         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
 875                 control |= SM501_DC_PANEL_CONTROL_HSP;
 876
 877         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
 878                 control |= SM501_DC_PANEL_CONTROL_VSP;
 879
 880         smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
 881         sm501fb_sync_regs(fbi);
 882
 883         /* ensure the panel interface is not tristated at this point */
 884
 885         sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
 886                          0, SM501_SYSCTRL_PANEL_TRISTATE);
 887
 888         /* power the panel up */
 889         sm501fb_panel_power(fbi, 1);
 890         return 0;
 891 }
 892
 893
 894 /* chan_to_field
 895  *
 896  * convert a colour value into a field position
 897  *
 898  * from pxafb.c
 899 */
 900
 901 static inline unsigned int chan_to_field(unsigned int chan,
 902                                          struct fb_bitfield *bf)
 903 {
 904         chan &= 0xffff;
 905         chan >>= 16 - bf->length;
 906         return chan << bf->offset;
 907 }
 908
 909 /* sm501fb_setcolreg
 910  *
 911  * set the colour mapping for modes that support palettised data
 912 */
 913
 914 static int sm501fb_setcolreg(unsigned regno,
 915                              unsigned red, unsigned green, unsigned blue,
 916                              unsigned transp, struct fb_info *info)
 917 {
 918         struct sm501fb_par  *par = info->par;
 919         struct sm501fb_info *fbi = par->info;
 920         void __iomem *base = fbi->regs;
 921         unsigned int val;
 922
 923         if (par->head == HEAD_CRT)
 924                 base += SM501_DC_CRT_PALETTE;
 925         else
 926                 base += SM501_DC_PANEL_PALETTE;
 927
 928         switch (info->fix.visual) {
 929         case FB_VISUAL_TRUECOLOR:
 930                 /* true-colour, use pseuo-palette */
 931
 932                 if (regno < 16) {
 933                         u32 *pal = par->pseudo_palette;
 934
 935                         val  = chan_to_field(red,   &info->var.red);
 936                         val |= chan_to_field(green, &info->var.green);
 937                         val |= chan_to_field(blue,  &info->var.blue);
 938
 939                         pal[regno] = val;
 940                 }
 941                 break;
 942
 943         case FB_VISUAL_PSEUDOCOLOR:
 944                 if (regno < 256) {
 945                         val = (red >> 8) << 16;
 946                         val |= (green >> 8) << 8;
 947                         val |= blue >> 8;
 948
 949                         smc501_writel(val, base + (regno * 4));
 950                 }
 951
 952                 break;
 953
 954         default:
 955                 return 1;   /* unknown type */
 956         }
 957
 958         return 0;
 959 }
 960
 961 /* sm501fb_blank_pnl
 962  *
 963  * Blank or un-blank the panel interface
 964 */
 965
 966 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
 967 {
 968         struct sm501fb_par  *par = info->par;
 969         struct sm501fb_info *fbi = par->info;
 970
 971         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
 972
 973         switch (blank_mode) {
 974         case FB_BLANK_POWERDOWN:
 975                 sm501fb_panel_power(fbi, 0);
 976                 break;
 977
 978         case FB_BLANK_UNBLANK:
 979                 sm501fb_panel_power(fbi, 1);
 980                 break;
 981
 982         case FB_BLANK_NORMAL:
 983         case FB_BLANK_VSYNC_SUSPEND:
 984         case FB_BLANK_HSYNC_SUSPEND:
 985         default:
 986                 return 1;
 987         }
 988
 989         return 0;
 990 }
 991
 992 /* sm501fb_blank_crt
 993  *
 994  * Blank or un-blank the crt interface
 995 */
 996
 997 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 998 {
 999         struct sm501fb_par  *par = info->par;
1000         struct sm501fb_info *fbi = par->info;
1001         unsigned long ctrl;
1002
1003         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
1004
1005         ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
1006
1007         switch (blank_mode) {
1008         case FB_BLANK_POWERDOWN:
1009                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1010                 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
1011
1012         case FB_BLANK_NORMAL:
1013                 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1014                 break;
1015
1016         case FB_BLANK_UNBLANK:
1017                 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1018                 ctrl |=  SM501_DC_CRT_CONTROL_ENABLE;
1019                 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1020                 break;
1021
1022         case FB_BLANK_VSYNC_SUSPEND:
1023         case FB_BLANK_HSYNC_SUSPEND:
1024         default:
1025                 return 1;
1026
1027         }
1028
1029         smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1030         sm501fb_sync_regs(fbi);
1031
1032         return 0;
1033 }
1034
1035 /* sm501fb_cursor
1036  *
1037  * set or change the hardware cursor parameters
1038 */
1039
1040 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1041 {
1042         struct sm501fb_par  *par = info->par;
1043         struct sm501fb_info *fbi = par->info;
1044         void __iomem *base = fbi->regs;
1045         unsigned long hwc_addr;
1046         unsigned long fg, bg;
1047
1048         dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1049
1050         if (par->head == HEAD_CRT)
1051                 base += SM501_DC_CRT_HWC_BASE;
1052         else
1053                 base += SM501_DC_PANEL_HWC_BASE;
1054
1055         /* check not being asked to exceed capabilities */
1056
1057         if (cursor->image.width > 64)
1058                 return -EINVAL;
1059
1060         if (cursor->image.height > 64)
1061                 return -EINVAL;
1062
1063         if (cursor->image.depth > 1)
1064                 return -EINVAL;
1065
1066         hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1067
1068         if (cursor->enable)
1069                 smc501_writel(hwc_addr | SM501_HWC_EN,
1070                                 base + SM501_OFF_HWC_ADDR);
1071         else
1072                 smc501_writel(hwc_addr & ~SM501_HWC_EN,
1073                                 base + SM501_OFF_HWC_ADDR);
1074
1075         /* set data */
1076         if (cursor->set & FB_CUR_SETPOS) {
1077                 unsigned int x = cursor->image.dx;
1078                 unsigned int y = cursor->image.dy;
1079
1080                 if (x >= 2048 || y >= 2048 )
1081                         return -EINVAL;
1082
1083                 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1084
1085                 //y += cursor->image.height;
1086
1087                 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1088         }
1089
1090         if (cursor->set & FB_CUR_SETCMAP) {
1091                 unsigned int bg_col = cursor->image.bg_color;
1092                 unsigned int fg_col = cursor->image.fg_color;
1093
1094                 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1095                         __func__, bg_col, fg_col);
1096
1097                 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1098                         ((info->cmap.green[bg_col] & 0xFC) << 3) |
1099                         ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1100
1101                 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1102                         ((info->cmap.green[fg_col] & 0xFC) << 3) |
1103                         ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1104
1105                 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1106
1107                 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1108                 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1109         }
1110
1111         if (cursor->set & FB_CUR_SETSIZE ||
1112             cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1113                 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1114                  * clears it to transparent then combines the cursor
1115                  * shape plane with the colour plane to set the
1116                  * cursor */
1117                 int x, y;
1118                 const unsigned char *pcol = cursor->image.data;
1119                 const unsigned char *pmsk = cursor->mask;
1120                 void __iomem   *dst = par->cursor.k_addr;
1121                 unsigned char  dcol = 0;
1122                 unsigned char  dmsk = 0;
1123                 unsigned int   op;
1124
1125                 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1126                         __func__, cursor->image.width, cursor->image.height);
1127
1128                 for (op = 0; op < (64*64*2)/8; op+=4)
1129                         smc501_writel(0x0, dst + op);
1130
1131                 for (y = 0; y < cursor->image.height; y++) {
1132                         for (x = 0; x < cursor->image.width; x++) {
1133                                 if ((x % 8) == 0) {
1134                                         dcol = *pcol++;
1135                                         dmsk = *pmsk++;
1136                                 } else {
1137                                         dcol >>= 1;
1138                                         dmsk >>= 1;
1139                                 }
1140
1141                                 if (dmsk & 1) {
1142                                         op = (dcol & 1) ? 1 : 3;
1143                                         op <<= ((x % 4) * 2);
1144
1145                                         op |= readb(dst + (x / 4));
1146                                         writeb(op, dst + (x / 4));
1147                                 }
1148                         }
1149                         dst += (64*2)/8;
1150                 }
1151         }
1152
1153         sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1154         return 0;
1155 }
1156
1157 /* sm501fb_crtsrc_show
1158  *
1159  * device attribute code to show where the crt output is sourced from
1160 */
1161
1162 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1163                                struct device_attribute *attr, char *buf)
1164 {
1165         struct sm501fb_info *info = dev_get_drvdata(dev);
1166         unsigned long ctrl;
1167
1168         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1169         ctrl &= SM501_DC_CRT_CONTROL_SEL;
1170
1171         return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1172 }
1173
1174 /* sm501fb_crtsrc_show
1175  *
1176  * device attribute code to set where the crt output is sourced from
1177 */
1178
1179 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1180                                 struct device_attribute *attr,
1181                                 const char *buf, size_t len)
1182 {
1183         struct sm501fb_info *info = dev_get_drvdata(dev);
1184         enum sm501_controller head;
1185         unsigned long ctrl;
1186
1187         if (len < 1)
1188                 return -EINVAL;
1189
1190         if (strncasecmp(buf, "crt", 3) == 0)
1191                 head = HEAD_CRT;
1192         else if (strncasecmp(buf, "panel", 5) == 0)
1193                 head = HEAD_PANEL;
1194         else
1195                 return -EINVAL;
1196
1197         dev_info(dev, "setting crt source to head %d\n", head);
1198
1199         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1200
1201         if (head == HEAD_CRT) {
1202                 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1203                 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1204                 ctrl |= SM501_DC_CRT_CONTROL_TE;
1205         } else {
1206                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1207                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1208                 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1209         }
1210
1211         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1212         sm501fb_sync_regs(info);
1213
1214         return len;
1215 }
1216
1217 /* Prepare the device_attr for registration with sysfs later */
1218 static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1219
1220 /* sm501fb_show_regs
1221  *
1222  * show the primary sm501 registers
1223 */
1224 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1225                              unsigned int start, unsigned int len)
1226 {
1227         void __iomem *mem = info->regs;
1228         char *buf = ptr;
1229         unsigned int reg;
1230
1231         for (reg = start; reg < (len + start); reg += 4)
1232                 ptr += sprintf(ptr, "%08x = %08x\n", reg,
1233                                 smc501_readl(mem + reg));
1234
1235         return ptr - buf;
1236 }
1237
1238 /* sm501fb_debug_show_crt
1239  *
1240  * show the crt control and cursor registers
1241 */
1242
1243 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1244                                   struct device_attribute *attr, char *buf)
1245 {
1246         struct sm501fb_info *info = dev_get_drvdata(dev);
1247         char *ptr = buf;
1248
1249         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1250         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1251
1252         return ptr - buf;
1253 }
1254
1255 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1256
1257 /* sm501fb_debug_show_pnl
1258  *
1259  * show the panel control and cursor registers
1260 */
1261
1262 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1263                                   struct device_attribute *attr, char *buf)
1264 {
1265         struct sm501fb_info *info = dev_get_drvdata(dev);
1266         char *ptr = buf;
1267
1268         ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1269         ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1270
1271         return ptr - buf;
1272 }
1273
1274 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1275
1276 /* acceleration operations */
1277 static int sm501fb_sync(struct fb_info *info)
1278 {
1279         int count = 1000000;
1280         struct sm501fb_par  *par = info->par;
1281         struct sm501fb_info *fbi = par->info;
1282
1283         /* wait for the 2d engine to be ready */
1284         while ((count > 0) &&
1285                (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1286                 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1287                 count--;
1288
1289         if (count <= 0) {
1290                 dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1291                 return 1;
1292         }
1293         return 0;
1294 }
1295
1296 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1297 {
1298         struct sm501fb_par  *par = info->par;
1299         struct sm501fb_info *fbi = par->info;
1300         int width = area->width;
1301         int height = area->height;
1302         int sx = area->sx;
1303         int sy = area->sy;
1304         int dx = area->dx;
1305         int dy = area->dy;
1306         unsigned long rtl = 0;
1307
1308         /* source clip */
1309         if ((sx >= info->var.xres_virtual) ||
1310             (sy >= info->var.yres_virtual))
1311                 /* source Area not within virtual screen, skipping */
1312                 return;
1313         if ((sx + width) >= info->var.xres_virtual)
1314                 width = info->var.xres_virtual - sx - 1;
1315         if ((sy + height) >= info->var.yres_virtual)
1316                 height = info->var.yres_virtual - sy - 1;
1317
1318         /* dest clip */
1319         if ((dx >= info->var.xres_virtual) ||
1320             (dy >= info->var.yres_virtual))
1321                 /* Destination Area not within virtual screen, skipping */
1322                 return;
1323         if ((dx + width) >= info->var.xres_virtual)
1324                 width = info->var.xres_virtual - dx - 1;
1325         if ((dy + height) >= info->var.yres_virtual)
1326                 height = info->var.yres_virtual - dy - 1;
1327
1328         if ((sx < dx) || (sy < dy)) {
1329                 rtl = 1 << 27;
1330                 sx += width - 1;
1331                 dx += width - 1;
1332                 sy += height - 1;
1333                 dy += height - 1;
1334         }
1335
1336         if (sm501fb_sync(info))
1337                 return;
1338
1339         /* set the base addresses */
1340         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1341         smc501_writel(par->screen.sm_addr,
1342                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1343
1344         /* set the window width */
1345         smc501_writel((info->var.xres << 16) | info->var.xres,
1346                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1347
1348         /* set window stride */
1349         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1350                fbi->regs2d + SM501_2D_PITCH);
1351
1352         /* set data format */
1353         switch (info->var.bits_per_pixel) {
1354         case 8:
1355                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1356                 break;
1357         case 16:
1358                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1359                 break;
1360         case 32:
1361                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1362                 break;
1363         }
1364
1365         /* 2d compare mask */
1366         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1367
1368         /* 2d mask */
1369         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1370
1371         /* source and destination x y */
1372         smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1373         smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1374
1375         /* w/h */
1376         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1377
1378         /* do area move */
1379         smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1380 }
1381
1382 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1383 {
1384         struct sm501fb_par  *par = info->par;
1385         struct sm501fb_info *fbi = par->info;
1386         int width = rect->width, height = rect->height;
1387
1388         if ((rect->dx >= info->var.xres_virtual) ||
1389             (rect->dy >= info->var.yres_virtual))
1390                 /* Rectangle not within virtual screen, skipping */
1391                 return;
1392         if ((rect->dx + width) >= info->var.xres_virtual)
1393                 width = info->var.xres_virtual - rect->dx - 1;
1394         if ((rect->dy + height) >= info->var.yres_virtual)
1395                 height = info->var.yres_virtual - rect->dy - 1;
1396
1397         if (sm501fb_sync(info))
1398                 return;
1399
1400         /* set the base addresses */
1401         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1402         smc501_writel(par->screen.sm_addr,
1403                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1404
1405         /* set the window width */
1406         smc501_writel((info->var.xres << 16) | info->var.xres,
1407                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1408
1409         /* set window stride */
1410         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1411                fbi->regs2d + SM501_2D_PITCH);
1412
1413         /* set data format */
1414         switch (info->var.bits_per_pixel) {
1415         case 8:
1416                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1417                 break;
1418         case 16:
1419                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1420                 break;
1421         case 32:
1422                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1423                 break;
1424         }
1425
1426         /* 2d compare mask */
1427         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1428
1429         /* 2d mask */
1430         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1431
1432         /* colour */
1433         smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1434
1435         /* x y */
1436         smc501_writel((rect->dx << 16) | rect->dy,
1437                         fbi->regs2d + SM501_2D_DESTINATION);
1438
1439         /* w/h */
1440         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1441
1442         /* do rectangle fill */
1443         smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1444 }
1445
1446
1447 static struct fb_ops sm501fb_ops_crt = {
1448         .owner          = THIS_MODULE,
1449         .fb_check_var   = sm501fb_check_var_crt,
1450         .fb_set_par     = sm501fb_set_par_crt,
1451         .fb_blank       = sm501fb_blank_crt,
1452         .fb_setcolreg   = sm501fb_setcolreg,
1453         .fb_pan_display = sm501fb_pan_crt,
1454         .fb_cursor      = sm501fb_cursor,
1455         .fb_fillrect    = sm501fb_fillrect,
1456         .fb_copyarea    = sm501fb_copyarea,
1457         .fb_imageblit   = cfb_imageblit,
1458         .fb_sync        = sm501fb_sync,
1459 };
1460
1461 static struct fb_ops sm501fb_ops_pnl = {
1462         .owner          = THIS_MODULE,
1463         .fb_check_var   = sm501fb_check_var_pnl,
1464         .fb_set_par     = sm501fb_set_par_pnl,
1465         .fb_pan_display = sm501fb_pan_pnl,
1466         .fb_blank       = sm501fb_blank_pnl,
1467         .fb_setcolreg   = sm501fb_setcolreg,
1468         .fb_cursor      = sm501fb_cursor,
1469         .fb_fillrect    = sm501fb_fillrect,
1470         .fb_copyarea    = sm501fb_copyarea,
1471         .fb_imageblit   = cfb_imageblit,
1472         .fb_sync        = sm501fb_sync,
1473 };
1474
1475 /* sm501_init_cursor
1476  *
1477  * initialise hw cursor parameters
1478 */
1479
1480 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1481 {
1482         struct sm501fb_par *par;
1483         struct sm501fb_info *info;
1484         int ret;
1485
1486         if (fbi == NULL)
1487                 return 0;
1488
1489         par = fbi->par;
1490         info = par->info;
1491
1492         par->cursor_regs = info->regs + reg_base;
1493
1494         ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1495                               fbi->fix.smem_len);
1496         if (ret < 0)
1497                 return ret;
1498
1499         /* initialise the colour registers */
1500
1501         smc501_writel(par->cursor.sm_addr,
1502                         par->cursor_regs + SM501_OFF_HWC_ADDR);
1503
1504         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1505         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1506         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1507         sm501fb_sync_regs(info);
1508
1509         return 0;
1510 }
1511
1512 /* sm501fb_info_start
1513  *
1514  * fills the par structure claiming resources and remapping etc.
1515 */
1516
1517 static int sm501fb_start(struct sm501fb_info *info,
1518                          struct platform_device *pdev)
1519 {
1520         struct resource *res;
1521         struct device *dev = &pdev->dev;
1522         int k;
1523         int ret;
1524
1525         info->irq = ret = platform_get_irq(pdev, 0);
1526         if (ret < 0) {
1527                 /* we currently do not use the IRQ */
1528                 dev_warn(dev, "no irq for device\n");
1529         }
1530
1531         /* allocate, reserve and remap resources for display
1532          * controller registers */
1533         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1534         if (res == NULL) {
1535                 dev_err(dev, "no resource definition for registers\n");
1536                 ret = -ENOENT;
1537                 goto err_release;
1538         }
1539
1540         info->regs_res = request_mem_region(res->start,
1541                                             resource_size(res),
1542                                             pdev->name);
1543
1544         if (info->regs_res == NULL) {
1545                 dev_err(dev, "cannot claim registers\n");
1546                 ret = -ENXIO;
1547                 goto err_release;
1548         }
1549
1550         info->regs = ioremap(res->start, resource_size(res));
1551         if (info->regs == NULL) {
1552                 dev_err(dev, "cannot remap registers\n");
1553                 ret = -ENXIO;
1554                 goto err_regs_res;
1555         }
1556
1557         /* allocate, reserve and remap resources for 2d
1558          * controller registers */
1559         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1560         if (res == NULL) {
1561                 dev_err(dev, "no resource definition for 2d registers\n");
1562                 ret = -ENOENT;
1563                 goto err_regs_map;
1564         }
1565
1566         info->regs2d_res = request_mem_region(res->start,
1567                                               resource_size(res),
1568                                               pdev->name);
1569
1570         if (info->regs2d_res == NULL) {
1571                 dev_err(dev, "cannot claim registers\n");
1572                 ret = -ENXIO;
1573                 goto err_regs_map;
1574         }
1575
1576         info->regs2d = ioremap(res->start, resource_size(res));
1577         if (info->regs2d == NULL) {
1578                 dev_err(dev, "cannot remap registers\n");
1579                 ret = -ENXIO;
1580                 goto err_regs2d_res;
1581         }
1582
1583         /* allocate, reserve resources for framebuffer */
1584         res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1585         if (res == NULL) {
1586                 dev_err(dev, "no memory resource defined\n");
1587                 ret = -ENXIO;
1588                 goto err_regs2d_map;
1589         }
1590
1591         info->fbmem_res = request_mem_region(res->start,
1592                                              resource_size(res),
1593                                              pdev->name);
1594         if (info->fbmem_res == NULL) {
1595                 dev_err(dev, "cannot claim framebuffer\n");
1596                 ret = -ENXIO;
1597                 goto err_regs2d_map;
1598         }
1599
1600         info->fbmem = ioremap(res->start, resource_size(res));
1601         if (info->fbmem == NULL) {
1602                 dev_err(dev, "cannot remap framebuffer\n");
1603                 goto err_mem_res;
1604         }
1605
1606         info->fbmem_len = resource_size(res);
1607
1608         /* clear framebuffer memory - avoids garbage data on unused fb */
1609         memset_io(info->fbmem, 0, info->fbmem_len);
1610
1611         /* clear palette ram - undefined at power on */
1612         for (k = 0; k < (256 * 3); k++)
1613                 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1614
1615         /* enable display controller */
1616         sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1617
1618         /* enable 2d controller */
1619         sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1620
1621         /* setup cursors */
1622         sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1623         sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1624
1625         return 0; /* everything is setup */
1626
1627  err_mem_res:
1628         release_mem_region(info->fbmem_res->start,
1629                            resource_size(info->fbmem_res));
1630
1631  err_regs2d_map:
1632         iounmap(info->regs2d);
1633
1634  err_regs2d_res:
1635         release_mem_region(info->regs2d_res->start,
1636                            resource_size(info->regs2d_res));
1637
1638  err_regs_map:
1639         iounmap(info->regs);
1640
1641  err_regs_res:
1642         release_mem_region(info->regs_res->start,
1643                            resource_size(info->regs_res));
1644
1645  err_release:
1646         return ret;
1647 }
1648
1649 static void sm501fb_stop(struct sm501fb_info *info)
1650 {
1651         /* disable display controller */
1652         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1653
1654         iounmap(info->fbmem);
1655         release_mem_region(info->fbmem_res->start,
1656                            resource_size(info->fbmem_res));
1657
1658         iounmap(info->regs2d);
1659         release_mem_region(info->regs2d_res->start,
1660                            resource_size(info->regs2d_res));
1661
1662         iounmap(info->regs);
1663         release_mem_region(info->regs_res->start,
1664                            resource_size(info->regs_res));
1665 }
1666
1667 static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
1668                            const char *fbname)
1669 {
1670         struct sm501_platdata_fbsub *pd;
1671         struct sm501fb_par *par = fb->par;
1672         struct sm501fb_info *info = par->info;
1673         unsigned long ctrl;
1674         unsigned int enable;
1675         int ret;
1676
1677         switch (head) {
1678         case HEAD_CRT:
1679                 pd = info->pdata->fb_crt;
1680                 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1681                 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1682
1683                 /* ensure we set the correct source register */
1684                 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1685                         ctrl |= SM501_DC_CRT_CONTROL_SEL;
1686                         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1687                 }
1688
1689                 break;
1690
1691         case HEAD_PANEL:
1692                 pd = info->pdata->fb_pnl;
1693                 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1694                 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1695                 break;
1696
1697         default:
1698                 pd = NULL;              /* stop compiler warnings */
1699                 ctrl = 0;
1700                 enable = 0;
1701                 BUG();
1702         }
1703
1704         dev_info(info->dev, "fb %s %sabled at start\n",
1705                  fbname, enable ? "en" : "dis");
1706
1707         /* check to see if our routing allows this */
1708
1709         if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1710                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1711                 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1712                 enable = 0;
1713         }
1714
1715         strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1716
1717         memcpy(&par->ops,
1718                (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1719                sizeof(struct fb_ops));
1720
1721         /* update ops dependent on what we've been passed */
1722
1723         if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1724                 par->ops.fb_cursor = NULL;
1725
1726         fb->fbops = &par->ops;
1727         fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1728                 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1729                 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1730
1731 #if defined(CONFIG_OF)
1732 #ifdef __BIG_ENDIAN
1733         if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
1734                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1735 #else
1736         if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
1737                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1738 #endif
1739 #endif
1740         /* fixed data */
1741
1742         fb->fix.type            = FB_TYPE_PACKED_PIXELS;
1743         fb->fix.type_aux        = 0;
1744         fb->fix.xpanstep        = 1;
1745         fb->fix.ypanstep        = 1;
1746         fb->fix.ywrapstep       = 0;
1747         fb->fix.accel           = FB_ACCEL_NONE;
1748
1749         /* screenmode */
1750
1751         fb->var.nonstd          = 0;
1752         fb->var.activate        = FB_ACTIVATE_NOW;
1753         fb->var.accel_flags     = 0;
1754         fb->var.vmode           = FB_VMODE_NONINTERLACED;
1755         fb->var.bits_per_pixel  = 16;
1756
1757         if (info->edid_data) {
1758                         /* Now build modedb from EDID */
1759                         fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1760                         fb_videomode_to_modelist(fb->monspecs.modedb,
1761                                                  fb->monspecs.modedb_len,
1762                                                  &fb->modelist);
1763         }
1764
1765         if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1766                 /* TODO read the mode from the current display */
1767         } else {
1768                 if (pd->def_mode) {
1769                         dev_info(info->dev, "using supplied mode\n");
1770                         fb_videomode_to_var(&fb->var, pd->def_mode);
1771
1772                         fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1773                         fb->var.xres_virtual = fb->var.xres;
1774                         fb->var.yres_virtual = fb->var.yres;
1775                 } else {
1776                         if (info->edid_data) {
1777                                 ret = fb_find_mode(&fb->var, fb, fb_mode,
1778                                         fb->monspecs.modedb,
1779                                         fb->monspecs.modedb_len,
1780                                         &sm501_default_mode, default_bpp);
1781                                 /* edid_data is no longer needed, free it */
1782                                 kfree(info->edid_data);
1783                         } else {
1784                                 ret = fb_find_mode(&fb->var, fb,
1785                                            NULL, NULL, 0, NULL, 8);
1786                         }
1787
1788                         switch (ret) {
1789                         case 1:
1790                                 dev_info(info->dev, "using mode specified in "
1791                                                 "@mode\n");
1792                                 break;
1793                         case 2:
1794                                 dev_info(info->dev, "using mode specified in "
1795                                         "@mode with ignored refresh rate\n");
1796                                 break;
1797                         case 3:
1798                                 dev_info(info->dev, "using mode default "
1799                                         "mode\n");
1800                                 break;
1801                         case 4:
1802                                 dev_info(info->dev, "using mode from list\n");
1803                                 break;
1804                         default:
1805                                 dev_info(info->dev, "ret = %d\n", ret);
1806                                 dev_info(info->dev, "failed to find mode\n");
1807                                 return -EINVAL;
1808                         }
1809                 }
1810         }
1811
1812         /* initialise and set the palette */
1813         if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1814                 dev_err(info->dev, "failed to allocate cmap memory\n");
1815                 return -ENOMEM;
1816         }
1817         fb_set_cmap(&fb->cmap, fb);
1818
1819         ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1820         if (ret)
1821                 dev_err(info->dev, "check_var() failed on initial setup?\n");
1822
1823         return 0;
1824 }
1825
1826 /* default platform data if none is supplied (ie, PCI device) */
1827
1828 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1829         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1830                            SM501FB_FLAG_USE_HWCURSOR |
1831                            SM501FB_FLAG_USE_HWACCEL |
1832                            SM501FB_FLAG_DISABLE_AT_EXIT),
1833
1834 };
1835
1836 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1837         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1838                            SM501FB_FLAG_USE_HWCURSOR |
1839                            SM501FB_FLAG_USE_HWACCEL |
1840                            SM501FB_FLAG_DISABLE_AT_EXIT),
1841 };
1842
1843 static struct sm501_platdata_fb sm501fb_def_pdata = {
1844         .fb_route               = SM501_FB_OWN,
1845         .fb_crt                 = &sm501fb_pdata_crt,
1846         .fb_pnl                 = &sm501fb_pdata_pnl,
1847 };
1848
1849 static char driver_name_crt[] = "sm501fb-crt";
1850 static char driver_name_pnl[] = "sm501fb-panel";
1851
1852 static int sm501fb_probe_one(struct sm501fb_info *info,
1853                              enum sm501_controller head)
1854 {
1855         unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1856         struct sm501_platdata_fbsub *pd;
1857         struct sm501fb_par *par;
1858         struct fb_info *fbi;
1859
1860         pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1861
1862         /* Do not initialise if we've not been given any platform data */
1863         if (pd == NULL) {
1864                 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1865                 return 0;
1866         }
1867
1868         fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1869         if (fbi == NULL) {
1870                 dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1871                 return -ENOMEM;
1872         }
1873
1874         par = fbi->par;
1875         par->info = info;
1876         par->head = head;
1877         fbi->pseudo_palette = &par->pseudo_palette;
1878
1879         info->fb[head] = fbi;
1880
1881         return 0;
1882 }
1883
1884 /* Free up anything allocated by sm501fb_init_fb */
1885
1886 static void sm501_free_init_fb(struct sm501fb_info *info,
1887                                 enum sm501_controller head)
1888 {
1889         struct fb_info *fbi = info->fb[head];
1890
1891         fb_dealloc_cmap(&fbi->cmap);
1892 }
1893
1894 static int sm501fb_start_one(struct sm501fb_info *info,
1895                              enum sm501_controller head, const char *drvname)
1896 {
1897         struct fb_info *fbi = info->fb[head];
1898         int ret;
1899
1900         if (!fbi)
1901                 return 0;
1902
1903         mutex_init(&info->fb[head]->mm_lock);
1904
1905         ret = sm501fb_init_fb(info->fb[head], head, drvname);
1906         if (ret) {
1907                 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1908                 return ret;
1909         }
1910
1911         ret = register_framebuffer(info->fb[head]);
1912         if (ret) {
1913                 dev_err(info->dev, "failed to register fb %s\n", drvname);
1914                 sm501_free_init_fb(info, head);
1915                 return ret;
1916         }
1917
1918         dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1919
1920         return 0;
1921 }
1922
1923 static int sm501fb_probe(struct platform_device *pdev)
1924 {
1925         struct sm501fb_info *info;
1926         struct device *dev = &pdev->dev;
1927         int ret;
1928
1929         /* allocate our framebuffers */
1930
1931         info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
1932         if (!info) {
1933                 dev_err(dev, "failed to allocate state\n");
1934                 return -ENOMEM;
1935         }
1936
1937         info->dev = dev = &pdev->dev;
1938         platform_set_drvdata(pdev, info);
1939
1940         if (dev->parent->platform_data) {
1941                 struct sm501_platdata *pd = dev->parent->platform_data;
1942                 info->pdata = pd->fb;
1943         }
1944
1945         if (info->pdata == NULL) {
1946                 int found = 0;
1947 #if defined(CONFIG_OF)
1948                 struct device_node *np = pdev->dev.parent->of_node;
1949                 const u8 *prop;
1950                 const char *cp;
1951                 int len;
1952
1953                 info->pdata = &sm501fb_def_pdata;
1954                 if (np) {
1955                         /* Get EDID */
1956                         cp = of_get_property(np, "mode", &len);
1957                         if (cp)
1958                                 strcpy(fb_mode, cp);
1959                         prop = of_get_property(np, "edid", &len);
1960                         if (prop && len == EDID_LENGTH) {
1961                                 info->edid_data = kmemdup(prop, EDID_LENGTH,
1962                                                           GFP_KERNEL);
1963                                 if (info->edid_data)
1964                                         found = 1;
1965                         }
1966                 }
1967 #endif
1968                 if (!found) {
1969                         dev_info(dev, "using default configuration data\n");
1970                         info->pdata = &sm501fb_def_pdata;
1971                 }
1972         }
1973
1974         /* probe for the presence of each panel */
1975
1976         ret = sm501fb_probe_one(info, HEAD_CRT);
1977         if (ret < 0) {
1978                 dev_err(dev, "failed to probe CRT\n");
1979                 goto err_alloc;
1980         }
1981
1982         ret = sm501fb_probe_one(info, HEAD_PANEL);
1983         if (ret < 0) {
1984                 dev_err(dev, "failed to probe PANEL\n");
1985                 goto err_probed_crt;
1986         }
1987
1988         if (info->fb[HEAD_PANEL] == NULL &&
1989             info->fb[HEAD_CRT] == NULL) {
1990                 dev_err(dev, "no framebuffers found\n");
1991                 ret = -ENODEV;
1992                 goto err_alloc;
1993         }
1994
1995         /* get the resources for both of the framebuffers */
1996
1997         ret = sm501fb_start(info, pdev);
1998         if (ret) {
1999                 dev_err(dev, "cannot initialise SM501\n");
2000                 goto err_probed_panel;
2001         }
2002
2003         ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2004         if (ret) {
2005                 dev_err(dev, "failed to start CRT\n");
2006                 goto err_started;
2007         }
2008
2009         ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2010         if (ret) {
2011                 dev_err(dev, "failed to start Panel\n");
2012                 goto err_started_crt;
2013         }
2014
2015         /* create device files */
2016
2017         ret = device_create_file(dev, &dev_attr_crt_src);
2018         if (ret)
2019                 goto err_started_panel;
2020
2021         ret = device_create_file(dev, &dev_attr_fbregs_pnl);
2022         if (ret)
2023                 goto err_attached_crtsrc_file;
2024
2025         ret = device_create_file(dev, &dev_attr_fbregs_crt);
2026         if (ret)
2027                 goto err_attached_pnlregs_file;
2028
2029         /* we registered, return ok */
2030         return 0;
2031
2032 err_attached_pnlregs_file:
2033         device_remove_file(dev, &dev_attr_fbregs_pnl);
2034
2035 err_attached_crtsrc_file:
2036         device_remove_file(dev, &dev_attr_crt_src);
2037
2038 err_started_panel:
2039         unregister_framebuffer(info->fb[HEAD_PANEL]);
2040         sm501_free_init_fb(info, HEAD_PANEL);
2041
2042 err_started_crt:
2043         unregister_framebuffer(info->fb[HEAD_CRT]);
2044         sm501_free_init_fb(info, HEAD_CRT);
2045
2046 err_started:
2047         sm501fb_stop(info);
2048
2049 err_probed_panel:
2050         framebuffer_release(info->fb[HEAD_PANEL]);
2051
2052 err_probed_crt:
2053         framebuffer_release(info->fb[HEAD_CRT]);
2054
2055 err_alloc:
2056         kfree(info);
2057
2058         return ret;
2059 }
2060
2061
2062 /*
2063  *  Cleanup
2064  */
2065 static int sm501fb_remove(struct platform_device *pdev)
2066 {
2067         struct sm501fb_info *info = platform_get_drvdata(pdev);
2068         struct fb_info     *fbinfo_crt = info->fb[0];
2069         struct fb_info     *fbinfo_pnl = info->fb[1];
2070
2071         device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
2072         device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
2073         device_remove_file(&pdev->dev, &dev_attr_crt_src);
2074
2075         sm501_free_init_fb(info, HEAD_CRT);
2076         sm501_free_init_fb(info, HEAD_PANEL);
2077
2078         unregister_framebuffer(fbinfo_crt);
2079         unregister_framebuffer(fbinfo_pnl);
2080
2081         sm501fb_stop(info);
2082         kfree(info);
2083
2084         framebuffer_release(fbinfo_pnl);
2085         framebuffer_release(fbinfo_crt);
2086
2087         return 0;
2088 }
2089
2090 #ifdef CONFIG_PM
2091
2092 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2093                               enum sm501_controller head)
2094 {
2095         struct fb_info *fbi = info->fb[head];
2096         struct sm501fb_par *par = fbi->par;
2097
2098         if (par->screen.size == 0)
2099                 return 0;
2100
2101         /* blank the relevant interface to ensure unit power minimised */
2102         (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2103
2104         /* tell console/fb driver we are suspending */
2105
2106         console_lock();
2107         fb_set_suspend(fbi, 1);
2108         console_unlock();
2109
2110         /* backup copies in case chip is powered down over suspend */
2111
2112         par->store_fb = vmalloc(par->screen.size);
2113         if (par->store_fb == NULL) {
2114                 dev_err(info->dev, "no memory to store screen\n");
2115                 return -ENOMEM;
2116         }
2117
2118         par->store_cursor = vmalloc(par->cursor.size);
2119         if (par->store_cursor == NULL) {
2120                 dev_err(info->dev, "no memory to store cursor\n");
2121                 goto err_nocursor;
2122         }
2123
2124         dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2125         dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2126
2127         memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2128         memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2129
2130         return 0;
2131
2132  err_nocursor:
2133         vfree(par->store_fb);
2134         par->store_fb = NULL;
2135
2136         return -ENOMEM;
2137 }
2138
2139 static void sm501fb_resume_fb(struct sm501fb_info *info,
2140                               enum sm501_controller head)
2141 {
2142         struct fb_info *fbi = info->fb[head];
2143         struct sm501fb_par *par = fbi->par;
2144
2145         if (par->screen.size == 0)
2146                 return;
2147
2148         /* re-activate the configuration */
2149
2150         (par->ops.fb_set_par)(fbi);
2151
2152         /* restore the data */
2153
2154         dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2155         dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2156
2157         if (par->store_fb)
2158                 memcpy_toio(par->screen.k_addr, par->store_fb,
2159                             par->screen.size);
2160
2161         if (par->store_cursor)
2162                 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2163                             par->cursor.size);
2164
2165         console_lock();
2166         fb_set_suspend(fbi, 0);
2167         console_unlock();
2168
2169         vfree(par->store_fb);
2170         vfree(par->store_cursor);
2171 }
2172
2173
2174 /* suspend and resume support */
2175
2176 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2177 {
2178         struct sm501fb_info *info = platform_get_drvdata(pdev);
2179
2180         /* store crt control to resume with */
2181         info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2182
2183         sm501fb_suspend_fb(info, HEAD_CRT);
2184         sm501fb_suspend_fb(info, HEAD_PANEL);
2185
2186         /* turn off the clocks, in case the device is not powered down */
2187         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2188
2189         return 0;
2190 }
2191
2192 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
2193                              SM501_DC_CRT_CONTROL_SEL)
2194
2195
2196 static int sm501fb_resume(struct platform_device *pdev)
2197 {
2198         struct sm501fb_info *info = platform_get_drvdata(pdev);
2199         unsigned long crt_ctrl;
2200
2201         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2202
2203         /* restore the items we want to be saved for crt control */
2204
2205         crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2206         crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2207         crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2208         smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2209
2210         sm501fb_resume_fb(info, HEAD_CRT);
2211         sm501fb_resume_fb(info, HEAD_PANEL);
2212
2213         return 0;
2214 }
2215
2216 #else
2217 #define sm501fb_suspend NULL
2218 #define sm501fb_resume  NULL
2219 #endif
2220
2221 static struct platform_driver sm501fb_driver = {
2222         .probe          = sm501fb_probe,
2223         .remove         = sm501fb_remove,
2224         .suspend        = sm501fb_suspend,
2225         .resume         = sm501fb_resume,
2226         .driver         = {
2227                 .name   = "sm501-fb",
2228         },
2229 };
2230
2231 module_platform_driver(sm501fb_driver);
2232
2233 module_param_named(mode, fb_mode, charp, 0);
2234 MODULE_PARM_DESC(mode,
2235         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2236 module_param_named(bpp, default_bpp, ulong, 0);
2237 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2238 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2239 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2240 MODULE_LICENSE("GPL v2");