drivers/video/fbdev/sm501fb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* linux/drivers/video/sm501fb.c
   3  *
   4  * Copyright (c) 2006 Simtec Electronics
   5  *      Vincent Sanders <vince@simtec.co.uk>
   6  *      Ben Dooks <ben@simtec.co.uk>
   7  *
   8  * Framebuffer driver for the Silicon Motion SM501
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/string.h>
  15 #include <linux/mm.h>
  16 #include <linux/tty.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/fb.h>
  20 #include <linux/init.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/workqueue.h>
  25 #include <linux/wait.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/clk.h>
  28 #include <linux/console.h>
  29 #include <linux/io.h>
  30
  31 #include <linux/uaccess.h>
  32 #include <asm/div64.h>
  33
  34 #ifdef CONFIG_PM
  35 #include <linux/pm.h>
  36 #endif
  37
  38 #include <linux/sm501.h>
  39 #include <linux/sm501-regs.h>
  40
  41 #include "edid.h"
  42
  43 static char *fb_mode = "640x480-16@60";
  44 static unsigned long default_bpp = 16;
  45
  46 static const struct fb_videomode sm501_default_mode = {
  47         .refresh        = 60,
  48         .xres           = 640,
  49         .yres           = 480,
  50         .pixclock       = 20833,
  51         .left_margin    = 142,
  52         .right_margin   = 13,
  53         .upper_margin   = 21,
  54         .lower_margin   = 1,
  55         .hsync_len      = 69,
  56         .vsync_len      = 3,
  57         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  58         .vmode          = FB_VMODE_NONINTERLACED
  59 };
  60
  61 #define NR_PALETTE      256
  62
  63 enum sm501_controller {
  64         HEAD_CRT        = 0,
  65         HEAD_PANEL      = 1,
  66 };
  67
  68 /* SM501 memory address.
  69  *
  70  * This structure is used to track memory usage within the SM501 framebuffer
  71  * allocation. The sm_addr field is stored as an offset as it is often used
  72  * against both the physical and mapped addresses.
  73  */
  74 struct sm501_mem {
  75         unsigned long    size;
  76         unsigned long    sm_addr;       /* offset from base of sm501 fb. */
  77         void __iomem    *k_addr;
  78 };
  79
  80 /* private data that is shared between all frambuffers* */
  81 struct sm501fb_info {
  82         struct device           *dev;
  83         struct fb_info          *fb[2];         /* fb info for both heads */
  84         struct resource         *fbmem_res;     /* framebuffer resource */
  85         struct resource         *regs_res;      /* registers resource */
  86         struct resource         *regs2d_res;    /* 2d registers resource */
  87         struct sm501_platdata_fb *pdata;        /* our platform data */
  88
  89         unsigned long            pm_crt_ctrl;   /* pm: crt ctrl save */
  90
  91         int                      irq;
  92         int                      swap_endian;   /* set to swap rgb=>bgr */
  93         void __iomem            *regs;          /* remapped registers */
  94         void __iomem            *regs2d;        /* 2d remapped registers */
  95         void __iomem            *fbmem;         /* remapped framebuffer */
  96         size_t                   fbmem_len;     /* length of remapped region */
  97         u8 *edid_data;
  98 };
  99
 100 /* per-framebuffer private data */
 101 struct sm501fb_par {
 102         u32                      pseudo_palette[16];
 103
 104         enum sm501_controller    head;
 105         struct sm501_mem         cursor;
 106         struct sm501_mem         screen;
 107         struct fb_ops            ops;
 108
 109         void                    *store_fb;
 110         void                    *store_cursor;
 111         void __iomem            *cursor_regs;
 112         struct sm501fb_info     *info;
 113 };
 114
 115 /* Helper functions */
 116
 117 static inline int h_total(struct fb_var_screeninfo *var)
 118 {
 119         return var->xres + var->left_margin +
 120                 var->right_margin + var->hsync_len;
 121 }
 122
 123 static inline int v_total(struct fb_var_screeninfo *var)
 124 {
 125         return var->yres + var->upper_margin +
 126                 var->lower_margin + var->vsync_len;
 127 }
 128
 129 /* sm501fb_sync_regs()
 130  *
 131  * This call is mainly for PCI bus systems where we need to
 132  * ensure that any writes to the bus are completed before the
 133  * next phase, or after completing a function.
 134 */
 135
 136 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
 137 {
 138         smc501_readl(info->regs);
 139 }
 140
 141 /* sm501_alloc_mem
 142  *
 143  * This is an attempt to lay out memory for the two framebuffers and
 144  * everything else
 145  *
 146  * |fbmem_res->start                                           fbmem_res->end|
 147  * |                                                                         |
 148  * |fb[0].fix.smem_start    |         |fb[1].fix.smem_start    |     2K      |
 149  * |-> fb[0].fix.smem_len <-| spare   |-> fb[1].fix.smem_len <-|-> cursors <-|
 150  *
 151  * The "spare" space is for the 2d engine data
 152  * the fixed is space for the cursors (2x1Kbyte)
 153  *
 154  * we need to allocate memory for the 2D acceleration engine
 155  * command list and the data for the engine to deal with.
 156  *
 157  * - all allocations must be 128bit aligned
 158  * - cursors are 64x64x2 bits (1Kbyte)
 159  *
 160  */
 161
 162 #define SM501_MEMF_CURSOR               (1)
 163 #define SM501_MEMF_PANEL                (2)
 164 #define SM501_MEMF_CRT                  (4)
 165 #define SM501_MEMF_ACCEL                (8)
 166
 167 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
 168                            unsigned int why, size_t size, u32 smem_len)
 169 {
 170         struct sm501fb_par *par;
 171         struct fb_info *fbi;
 172         unsigned int ptr;
 173         unsigned int end;
 174
 175         switch (why) {
 176         case SM501_MEMF_CURSOR:
 177                 ptr = inf->fbmem_len - size;
 178                 inf->fbmem_len = ptr;   /* adjust available memory. */
 179                 break;
 180
 181         case SM501_MEMF_PANEL:
 182                 if (size > inf->fbmem_len)
 183                         return -ENOMEM;
 184
 185                 ptr = inf->fbmem_len - size;
 186                 fbi = inf->fb[HEAD_CRT];
 187
 188                 /* round down, some programs such as directfb do not draw
 189                  * 0,0 correctly unless the start is aligned to a page start.
 190                  */
 191
 192                 if (ptr > 0)
 193                         ptr &= ~(PAGE_SIZE - 1);
 194
 195                 if (fbi && ptr < smem_len)
 196                         return -ENOMEM;
 197
 198                 break;
 199
 200         case SM501_MEMF_CRT:
 201                 ptr = 0;
 202
 203                 /* check to see if we have panel memory allocated
 204                  * which would put an limit on available memory. */
 205
 206                 fbi = inf->fb[HEAD_PANEL];
 207                 if (fbi) {
 208                         par = fbi->par;
 209                         end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
 210                 } else
 211                         end = inf->fbmem_len;
 212
 213                 if ((ptr + size) > end)
 214                         return -ENOMEM;
 215
 216                 break;
 217
 218         case SM501_MEMF_ACCEL:
 219                 fbi = inf->fb[HEAD_CRT];
 220                 ptr = fbi ? smem_len : 0;
 221
 222                 fbi = inf->fb[HEAD_PANEL];
 223                 if (fbi) {
 224                         par = fbi->par;
 225                         end = par->screen.sm_addr;
 226                 } else
 227                         end = inf->fbmem_len;
 228
 229                 if ((ptr + size) > end)
 230                         return -ENOMEM;
 231
 232                 break;
 233
 234         default:
 235                 return -EINVAL;
 236         }
 237
 238         mem->size    = size;
 239         mem->sm_addr = ptr;
 240         mem->k_addr  = inf->fbmem + ptr;
 241
 242         dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
 243                 __func__, mem->sm_addr, mem->k_addr, why, size);
 244
 245         return 0;
 246 }
 247
 248 /* sm501fb_ps_to_hz
 249  *
 250  * Converts a period in picoseconds to Hz.
 251  *
 252  * Note, we try to keep this in Hz to minimise rounding with
 253  * the limited PLL settings on the SM501.
 254 */
 255
 256 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
 257 {
 258         unsigned long long numerator=1000000000000ULL;
 259
 260         /* 10^12 / picosecond period gives frequency in Hz */
 261         do_div(numerator, psvalue);
 262         return (unsigned long)numerator;
 263 }
 264
 265 /* sm501fb_hz_to_ps is identical to the opposite transform */
 266
 267 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
 268
 269 /* sm501fb_setup_gamma
 270  *
 271  * Programs a linear 1.0 gamma ramp in case the gamma
 272  * correction is enabled without programming anything else.
 273 */
 274
 275 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
 276                                 unsigned long palette)
 277 {
 278         unsigned long value = 0;
 279         int offset;
 280
 281         /* set gamma values */
 282         for (offset = 0; offset < 256 * 4; offset += 4) {
 283                 smc501_writel(value, fbi->regs + palette + offset);
 284                 value += 0x010101;      /* Advance RGB by 1,1,1.*/
 285         }
 286 }
 287
 288 /* sm501fb_check_var
 289  *
 290  * check common variables for both panel and crt
 291 */
 292
 293 static int sm501fb_check_var(struct fb_var_screeninfo *var,
 294                              struct fb_info *info)
 295 {
 296         struct sm501fb_par  *par = info->par;
 297         struct sm501fb_info *sm  = par->info;
 298         unsigned long tmp;
 299
 300         /* check we can fit these values into the registers */
 301
 302         if (var->hsync_len > 255 || var->vsync_len > 63)
 303                 return -EINVAL;
 304
 305         /* hdisplay end and hsync start */
 306         if ((var->xres + var->right_margin) > 4096)
 307                 return -EINVAL;
 308
 309         /* vdisplay end and vsync start */
 310         if ((var->yres + var->lower_margin) > 2048)
 311                 return -EINVAL;
 312
 313         /* hard limits of device */
 314
 315         if (h_total(var) > 4096 || v_total(var) > 2048)
 316                 return -EINVAL;
 317
 318         /* check our line length is going to be 128 bit aligned */
 319
 320         tmp = (var->xres * var->bits_per_pixel) / 8;
 321         if ((tmp & 15) != 0)
 322                 return -EINVAL;
 323
 324         /* check the virtual size */
 325
 326         if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
 327                 return -EINVAL;
 328
 329         /* can cope with 8,16 or 32bpp */
 330
 331         if (var->bits_per_pixel <= 8)
 332                 var->bits_per_pixel = 8;
 333         else if (var->bits_per_pixel <= 16)
 334                 var->bits_per_pixel = 16;
 335         else if (var->bits_per_pixel == 24)
 336                 var->bits_per_pixel = 32;
 337
 338         /* set r/g/b positions and validate bpp */
 339         switch(var->bits_per_pixel) {
 340         case 8:
 341                 var->red.length         = var->bits_per_pixel;
 342                 var->red.offset         = 0;
 343                 var->green.length       = var->bits_per_pixel;
 344                 var->green.offset       = 0;
 345                 var->blue.length        = var->bits_per_pixel;
 346                 var->blue.offset        = 0;
 347                 var->transp.length      = 0;
 348                 var->transp.offset      = 0;
 349
 350                 break;
 351
 352         case 16:
 353                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
 354                         var->blue.offset        = 11;
 355                         var->green.offset       = 5;
 356                         var->red.offset         = 0;
 357                 } else {
 358                         var->red.offset         = 11;
 359                         var->green.offset       = 5;
 360                         var->blue.offset        = 0;
 361                 }
 362                 var->transp.offset      = 0;
 363
 364                 var->red.length         = 5;
 365                 var->green.length       = 6;
 366                 var->blue.length        = 5;
 367                 var->transp.length      = 0;
 368                 break;
 369
 370         case 32:
 371                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
 372                         var->transp.offset      = 0;
 373                         var->red.offset         = 8;
 374                         var->green.offset       = 16;
 375                         var->blue.offset        = 24;
 376                 } else {
 377                         var->transp.offset      = 24;
 378                         var->red.offset         = 16;
 379                         var->green.offset       = 8;
 380                         var->blue.offset        = 0;
 381                 }
 382
 383                 var->red.length         = 8;
 384                 var->green.length       = 8;
 385                 var->blue.length        = 8;
 386                 var->transp.length      = 0;
 387                 break;
 388
 389         default:
 390                 return -EINVAL;
 391         }
 392
 393         return 0;
 394 }
 395
 396 /*
 397  * sm501fb_check_var_crt():
 398  *
 399  * check the parameters for the CRT head, and either bring them
 400  * back into range, or return -EINVAL.
 401 */
 402
 403 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
 404                                  struct fb_info *info)
 405 {
 406         return sm501fb_check_var(var, info);
 407 }
 408
 409 /* sm501fb_check_var_pnl():
 410  *
 411  * check the parameters for the CRT head, and either bring them
 412  * back into range, or return -EINVAL.
 413 */
 414
 415 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
 416                                  struct fb_info *info)
 417 {
 418         return sm501fb_check_var(var, info);
 419 }
 420
 421 /* sm501fb_set_par_common
 422  *
 423  * set common registers for framebuffers
 424 */
 425
 426 static int sm501fb_set_par_common(struct fb_info *info,
 427                                   struct fb_var_screeninfo *var)
 428 {
 429         struct sm501fb_par  *par = info->par;
 430         struct sm501fb_info *fbi = par->info;
 431         unsigned long pixclock;      /* pixelclock in Hz */
 432         unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
 433         unsigned int mem_type;
 434         unsigned int clock_type;
 435         unsigned int head_addr;
 436         unsigned int smem_len;
 437
 438         dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
 439                 __func__, var->xres, var->yres, var->bits_per_pixel,
 440                 var->xres_virtual, var->yres_virtual);
 441
 442         switch (par->head) {
 443         case HEAD_CRT:
 444                 mem_type = SM501_MEMF_CRT;
 445                 clock_type = SM501_CLOCK_V2XCLK;
 446                 head_addr = SM501_DC_CRT_FB_ADDR;
 447                 break;
 448
 449         case HEAD_PANEL:
 450                 mem_type = SM501_MEMF_PANEL;
 451                 clock_type = SM501_CLOCK_P2XCLK;
 452                 head_addr = SM501_DC_PANEL_FB_ADDR;
 453                 break;
 454
 455         default:
 456                 mem_type = 0;           /* stop compiler warnings */
 457                 head_addr = 0;
 458                 clock_type = 0;
 459         }
 460
 461         switch (var->bits_per_pixel) {
 462         case 8:
 463                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 464                 break;
 465
 466         case 16:
 467                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 468                 break;
 469
 470         case 32:
 471                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 472                 break;
 473         }
 474
 475         /* allocate fb memory within 501 */
 476         info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
 477         smem_len = info->fix.line_length * var->yres_virtual;
 478
 479         dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
 480                 info->fix.line_length);
 481
 482         if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
 483                 dev_err(fbi->dev, "no memory available\n");
 484                 return -ENOMEM;
 485         }
 486
 487         mutex_lock(&info->mm_lock);
 488         info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
 489         info->fix.smem_len   = smem_len;
 490         mutex_unlock(&info->mm_lock);
 491
 492         info->screen_base = fbi->fbmem + par->screen.sm_addr;
 493         info->screen_size = info->fix.smem_len;
 494
 495         /* set start of framebuffer to the screen */
 496
 497         smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
 498                         fbi->regs + head_addr);
 499
 500         /* program CRT clock  */
 501
 502         pixclock = sm501fb_ps_to_hz(var->pixclock);
 503
 504         sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
 505                                         pixclock);
 506
 507         /* update fb layer with actual clock used */
 508         var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
 509
 510         dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz)  = %lu, "
 511                "sm501pixclock = %lu,  error = %ld%%\n",
 512                __func__, var->pixclock, pixclock, sm501pixclock,
 513                ((pixclock - sm501pixclock)*100)/pixclock);
 514
 515         return 0;
 516 }
 517
 518 /* sm501fb_set_par_geometry
 519  *
 520  * set the geometry registers for specified framebuffer.
 521 */
 522
 523 static void sm501fb_set_par_geometry(struct fb_info *info,
 524                                      struct fb_var_screeninfo *var)
 525 {
 526         struct sm501fb_par  *par = info->par;
 527         struct sm501fb_info *fbi = par->info;
 528         void __iomem *base = fbi->regs;
 529         unsigned long reg;
 530
 531         if (par->head == HEAD_CRT)
 532                 base += SM501_DC_CRT_H_TOT;
 533         else
 534                 base += SM501_DC_PANEL_H_TOT;
 535
 536         /* set framebuffer width and display width */
 537
 538         reg = info->fix.line_length;
 539         reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
 540
 541         smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
 542                     SM501_DC_CRT_FB_OFFSET :  SM501_DC_PANEL_FB_OFFSET));
 543
 544         /* program horizontal total */
 545
 546         reg  = (h_total(var) - 1) << 16;
 547         reg |= (var->xres - 1);
 548
 549         smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
 550
 551         /* program horizontal sync */
 552
 553         reg  = var->hsync_len << 16;
 554         reg |= var->xres + var->right_margin - 1;
 555
 556         smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
 557
 558         /* program vertical total */
 559
 560         reg  = (v_total(var) - 1) << 16;
 561         reg |= (var->yres - 1);
 562
 563         smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
 564
 565         /* program vertical sync */
 566         reg  = var->vsync_len << 16;
 567         reg |= var->yres + var->lower_margin - 1;
 568
 569         smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
 570 }
 571
 572 /* sm501fb_pan_crt
 573  *
 574  * pan the CRT display output within an virtual framebuffer
 575 */
 576
 577 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
 578                            struct fb_info *info)
 579 {
 580         struct sm501fb_par  *par = info->par;
 581         struct sm501fb_info *fbi = par->info;
 582         unsigned int bytes_pixel = info->var.bits_per_pixel / 8;
 583         unsigned long reg;
 584         unsigned long xoffs;
 585
 586         xoffs = var->xoffset * bytes_pixel;
 587
 588         reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 589
 590         reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
 591         reg |= ((xoffs & 15) / bytes_pixel) << 4;
 592         smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
 593
 594         reg = (par->screen.sm_addr + xoffs +
 595                var->yoffset * info->fix.line_length);
 596         smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
 597
 598         sm501fb_sync_regs(fbi);
 599         return 0;
 600 }
 601
 602 /* sm501fb_pan_pnl
 603  *
 604  * pan the panel display output within an virtual framebuffer
 605 */
 606
 607 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
 608                            struct fb_info *info)
 609 {
 610         struct sm501fb_par  *par = info->par;
 611         struct sm501fb_info *fbi = par->info;
 612         unsigned long reg;
 613
 614         reg = var->xoffset | (info->var.xres_virtual << 16);
 615         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
 616
 617         reg = var->yoffset | (info->var.yres_virtual << 16);
 618         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
 619
 620         sm501fb_sync_regs(fbi);
 621         return 0;
 622 }
 623
 624 /* sm501fb_set_par_crt
 625  *
 626  * Set the CRT video mode from the fb_info structure
 627 */
 628
 629 static int sm501fb_set_par_crt(struct fb_info *info)
 630 {
 631         struct sm501fb_par  *par = info->par;
 632         struct sm501fb_info *fbi = par->info;
 633         struct fb_var_screeninfo *var = &info->var;
 634         unsigned long control;       /* control register */
 635         int ret;
 636
 637         /* activate new configuration */
 638
 639         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
 640
 641         /* enable CRT DAC - note 0 is on!*/
 642         sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
 643
 644         control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 645
 646         control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
 647                     SM501_DC_CRT_CONTROL_GAMMA |
 648                     SM501_DC_CRT_CONTROL_BLANK |
 649                     SM501_DC_CRT_CONTROL_SEL |
 650                     SM501_DC_CRT_CONTROL_CP |
 651                     SM501_DC_CRT_CONTROL_TVP);
 652
 653         /* set the sync polarities before we check data source  */
 654
 655         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
 656                 control |= SM501_DC_CRT_CONTROL_HSP;
 657
 658         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
 659                 control |= SM501_DC_CRT_CONTROL_VSP;
 660
 661         if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
 662                 /* the head is displaying panel data... */
 663
 664                 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
 665                                 info->fix.smem_len);
 666                 goto out_update;
 667         }
 668
 669         ret = sm501fb_set_par_common(info, var);
 670         if (ret) {
 671                 dev_err(fbi->dev, "failed to set common parameters\n");
 672                 return ret;
 673         }
 674
 675         sm501fb_pan_crt(var, info);
 676         sm501fb_set_par_geometry(info, var);
 677
 678         control |= SM501_FIFO_3;        /* fill if >3 free slots */
 679
 680         switch(var->bits_per_pixel) {
 681         case 8:
 682                 control |= SM501_DC_CRT_CONTROL_8BPP;
 683                 break;
 684
 685         case 16:
 686                 control |= SM501_DC_CRT_CONTROL_16BPP;
 687                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
 688                 break;
 689
 690         case 32:
 691                 control |= SM501_DC_CRT_CONTROL_32BPP;
 692                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
 693                 break;
 694
 695         default:
 696                 BUG();
 697         }
 698
 699         control |= SM501_DC_CRT_CONTROL_SEL;    /* CRT displays CRT data */
 700         control |= SM501_DC_CRT_CONTROL_TE;     /* enable CRT timing */
 701         control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
 702
 703  out_update:
 704         dev_dbg(fbi->dev, "new control is %08lx\n", control);
 705
 706         smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
 707         sm501fb_sync_regs(fbi);
 708
 709         return 0;
 710 }
 711
 712 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
 713 {
 714         unsigned long control;
 715         void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
 716         struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
 717
 718         control = smc501_readl(ctrl_reg);
 719
 720         if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
 721                 /* enable panel power */
 722
 723                 control |= SM501_DC_PANEL_CONTROL_VDD;  /* FPVDDEN */
 724                 smc501_writel(control, ctrl_reg);
 725                 sm501fb_sync_regs(fbi);
 726                 mdelay(10);
 727
 728                 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
 729                 smc501_writel(control, ctrl_reg);
 730                 sm501fb_sync_regs(fbi);
 731                 mdelay(10);
 732
 733                 /* VBIASEN */
 734
 735                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
 736                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
 737                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
 738                         else
 739                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
 740
 741                         smc501_writel(control, ctrl_reg);
 742                         sm501fb_sync_regs(fbi);
 743                         mdelay(10);
 744                 }
 745
 746                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
 747                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
 748                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
 749                         else
 750                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
 751
 752                         smc501_writel(control, ctrl_reg);
 753                         sm501fb_sync_regs(fbi);
 754                         mdelay(10);
 755                 }
 756         } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
 757                 /* disable panel power */
 758                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
 759                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
 760                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
 761                         else
 762                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
 763
 764                         smc501_writel(control, ctrl_reg);
 765                         sm501fb_sync_regs(fbi);
 766                         mdelay(10);
 767                 }
 768
 769                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
 770                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
 771                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
 772                         else
 773                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
 774
 775                         smc501_writel(control, ctrl_reg);
 776                         sm501fb_sync_regs(fbi);
 777                         mdelay(10);
 778                 }
 779
 780                 control &= ~SM501_DC_PANEL_CONTROL_DATA;
 781                 smc501_writel(control, ctrl_reg);
 782                 sm501fb_sync_regs(fbi);
 783                 mdelay(10);
 784
 785                 control &= ~SM501_DC_PANEL_CONTROL_VDD;
 786                 smc501_writel(control, ctrl_reg);
 787                 sm501fb_sync_regs(fbi);
 788                 mdelay(10);
 789         }
 790
 791         sm501fb_sync_regs(fbi);
 792 }
 793
 794 /* sm501fb_set_par_pnl
 795  *
 796  * Set the panel video mode from the fb_info structure
 797 */
 798
 799 static int sm501fb_set_par_pnl(struct fb_info *info)
 800 {
 801         struct sm501fb_par  *par = info->par;
 802         struct sm501fb_info *fbi = par->info;
 803         struct fb_var_screeninfo *var = &info->var;
 804         unsigned long control;
 805         unsigned long reg;
 806         int ret;
 807
 808         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
 809
 810         /* activate this new configuration */
 811
 812         ret = sm501fb_set_par_common(info, var);
 813         if (ret)
 814                 return ret;
 815
 816         sm501fb_pan_pnl(var, info);
 817         sm501fb_set_par_geometry(info, var);
 818
 819         /* update control register */
 820
 821         control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
 822         control &= (SM501_DC_PANEL_CONTROL_GAMMA |
 823                     SM501_DC_PANEL_CONTROL_VDD  |
 824                     SM501_DC_PANEL_CONTROL_DATA |
 825                     SM501_DC_PANEL_CONTROL_BIAS |
 826                     SM501_DC_PANEL_CONTROL_FPEN |
 827                     SM501_DC_PANEL_CONTROL_CP |
 828                     SM501_DC_PANEL_CONTROL_CK |
 829                     SM501_DC_PANEL_CONTROL_HP |
 830                     SM501_DC_PANEL_CONTROL_VP |
 831                     SM501_DC_PANEL_CONTROL_HPD |
 832                     SM501_DC_PANEL_CONTROL_VPD);
 833
 834         control |= SM501_FIFO_3;        /* fill if >3 free slots */
 835
 836         switch(var->bits_per_pixel) {
 837         case 8:
 838                 control |= SM501_DC_PANEL_CONTROL_8BPP;
 839                 break;
 840
 841         case 16:
 842                 control |= SM501_DC_PANEL_CONTROL_16BPP;
 843                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
 844                 break;
 845
 846         case 32:
 847                 control |= SM501_DC_PANEL_CONTROL_32BPP;
 848                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
 849                 break;
 850
 851         default:
 852                 BUG();
 853         }
 854
 855         smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
 856
 857         /* panel plane top left and bottom right location */
 858
 859         smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
 860
 861         reg  = var->xres - 1;
 862         reg |= (var->yres - 1) << 16;
 863
 864         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
 865
 866         /* program panel control register */
 867
 868         control |= SM501_DC_PANEL_CONTROL_TE;   /* enable PANEL timing */
 869         control |= SM501_DC_PANEL_CONTROL_EN;   /* enable PANEL gfx plane */
 870
 871         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
 872                 control |= SM501_DC_PANEL_CONTROL_HSP;
 873
 874         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
 875                 control |= SM501_DC_PANEL_CONTROL_VSP;
 876
 877         smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
 878         sm501fb_sync_regs(fbi);
 879
 880         /* ensure the panel interface is not tristated at this point */
 881
 882         sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
 883                          0, SM501_SYSCTRL_PANEL_TRISTATE);
 884
 885         /* power the panel up */
 886         sm501fb_panel_power(fbi, 1);
 887         return 0;
 888 }
 889
 890
 891 /* chan_to_field
 892  *
 893  * convert a colour value into a field position
 894  *
 895  * from pxafb.c
 896 */
 897
 898 static inline unsigned int chan_to_field(unsigned int chan,
 899                                          struct fb_bitfield *bf)
 900 {
 901         chan &= 0xffff;
 902         chan >>= 16 - bf->length;
 903         return chan << bf->offset;
 904 }
 905
 906 /* sm501fb_setcolreg
 907  *
 908  * set the colour mapping for modes that support palettised data
 909 */
 910
 911 static int sm501fb_setcolreg(unsigned regno,
 912                              unsigned red, unsigned green, unsigned blue,
 913                              unsigned transp, struct fb_info *info)
 914 {
 915         struct sm501fb_par  *par = info->par;
 916         struct sm501fb_info *fbi = par->info;
 917         void __iomem *base = fbi->regs;
 918         unsigned int val;
 919
 920         if (par->head == HEAD_CRT)
 921                 base += SM501_DC_CRT_PALETTE;
 922         else
 923                 base += SM501_DC_PANEL_PALETTE;
 924
 925         switch (info->fix.visual) {
 926         case FB_VISUAL_TRUECOLOR:
 927                 /* true-colour, use pseuo-palette */
 928
 929                 if (regno < 16) {
 930                         u32 *pal = par->pseudo_palette;
 931
 932                         val  = chan_to_field(red,   &info->var.red);
 933                         val |= chan_to_field(green, &info->var.green);
 934                         val |= chan_to_field(blue,  &info->var.blue);
 935
 936                         pal[regno] = val;
 937                 }
 938                 break;
 939
 940         case FB_VISUAL_PSEUDOCOLOR:
 941                 if (regno < 256) {
 942                         val = (red >> 8) << 16;
 943                         val |= (green >> 8) << 8;
 944                         val |= blue >> 8;
 945
 946                         smc501_writel(val, base + (regno * 4));
 947                 }
 948
 949                 break;
 950
 951         default:
 952                 return 1;   /* unknown type */
 953         }
 954
 955         return 0;
 956 }
 957
 958 /* sm501fb_blank_pnl
 959  *
 960  * Blank or un-blank the panel interface
 961 */
 962
 963 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
 964 {
 965         struct sm501fb_par  *par = info->par;
 966         struct sm501fb_info *fbi = par->info;
 967
 968         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
 969
 970         switch (blank_mode) {
 971         case FB_BLANK_POWERDOWN:
 972                 sm501fb_panel_power(fbi, 0);
 973                 break;
 974
 975         case FB_BLANK_UNBLANK:
 976                 sm501fb_panel_power(fbi, 1);
 977                 break;
 978
 979         case FB_BLANK_NORMAL:
 980         case FB_BLANK_VSYNC_SUSPEND:
 981         case FB_BLANK_HSYNC_SUSPEND:
 982         default:
 983                 return 1;
 984         }
 985
 986         return 0;
 987 }
 988
 989 /* sm501fb_blank_crt
 990  *
 991  * Blank or un-blank the crt interface
 992 */
 993
 994 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 995 {
 996         struct sm501fb_par  *par = info->par;
 997         struct sm501fb_info *fbi = par->info;
 998         unsigned long ctrl;
 999
1000         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
1001
1002         ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
1003
1004         switch (blank_mode) {
1005         case FB_BLANK_POWERDOWN:
1006                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1007                 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
1008                 /* fall through */
1009
1010         case FB_BLANK_NORMAL:
1011                 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1012                 break;
1013
1014         case FB_BLANK_UNBLANK:
1015                 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1016                 ctrl |=  SM501_DC_CRT_CONTROL_ENABLE;
1017                 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1018                 break;
1019
1020         case FB_BLANK_VSYNC_SUSPEND:
1021         case FB_BLANK_HSYNC_SUSPEND:
1022         default:
1023                 return 1;
1024
1025         }
1026
1027         smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1028         sm501fb_sync_regs(fbi);
1029
1030         return 0;
1031 }
1032
1033 /* sm501fb_cursor
1034  *
1035  * set or change the hardware cursor parameters
1036 */
1037
1038 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1039 {
1040         struct sm501fb_par  *par = info->par;
1041         struct sm501fb_info *fbi = par->info;
1042         void __iomem *base = fbi->regs;
1043         unsigned long hwc_addr;
1044         unsigned long fg, bg;
1045
1046         dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1047
1048         if (par->head == HEAD_CRT)
1049                 base += SM501_DC_CRT_HWC_BASE;
1050         else
1051                 base += SM501_DC_PANEL_HWC_BASE;
1052
1053         /* check not being asked to exceed capabilities */
1054
1055         if (cursor->image.width > 64)
1056                 return -EINVAL;
1057
1058         if (cursor->image.height > 64)
1059                 return -EINVAL;
1060
1061         if (cursor->image.depth > 1)
1062                 return -EINVAL;
1063
1064         hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1065
1066         if (cursor->enable)
1067                 smc501_writel(hwc_addr | SM501_HWC_EN,
1068                                 base + SM501_OFF_HWC_ADDR);
1069         else
1070                 smc501_writel(hwc_addr & ~SM501_HWC_EN,
1071                                 base + SM501_OFF_HWC_ADDR);
1072
1073         /* set data */
1074         if (cursor->set & FB_CUR_SETPOS) {
1075                 unsigned int x = cursor->image.dx;
1076                 unsigned int y = cursor->image.dy;
1077
1078                 if (x >= 2048 || y >= 2048 )
1079                         return -EINVAL;
1080
1081                 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1082
1083                 //y += cursor->image.height;
1084
1085                 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1086         }
1087
1088         if (cursor->set & FB_CUR_SETCMAP) {
1089                 unsigned int bg_col = cursor->image.bg_color;
1090                 unsigned int fg_col = cursor->image.fg_color;
1091
1092                 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1093                         __func__, bg_col, fg_col);
1094
1095                 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1096                         ((info->cmap.green[bg_col] & 0xFC) << 3) |
1097                         ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1098
1099                 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1100                         ((info->cmap.green[fg_col] & 0xFC) << 3) |
1101                         ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1102
1103                 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1104
1105                 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1106                 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1107         }
1108
1109         if (cursor->set & FB_CUR_SETSIZE ||
1110             cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1111                 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1112                  * clears it to transparent then combines the cursor
1113                  * shape plane with the colour plane to set the
1114                  * cursor */
1115                 int x, y;
1116                 const unsigned char *pcol = cursor->image.data;
1117                 const unsigned char *pmsk = cursor->mask;
1118                 void __iomem   *dst = par->cursor.k_addr;
1119                 unsigned char  dcol = 0;
1120                 unsigned char  dmsk = 0;
1121                 unsigned int   op;
1122
1123                 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1124                         __func__, cursor->image.width, cursor->image.height);
1125
1126                 for (op = 0; op < (64*64*2)/8; op+=4)
1127                         smc501_writel(0x0, dst + op);
1128
1129                 for (y = 0; y < cursor->image.height; y++) {
1130                         for (x = 0; x < cursor->image.width; x++) {
1131                                 if ((x % 8) == 0) {
1132                                         dcol = *pcol++;
1133                                         dmsk = *pmsk++;
1134                                 } else {
1135                                         dcol >>= 1;
1136                                         dmsk >>= 1;
1137                                 }
1138
1139                                 if (dmsk & 1) {
1140                                         op = (dcol & 1) ? 1 : 3;
1141                                         op <<= ((x % 4) * 2);
1142
1143                                         op |= readb(dst + (x / 4));
1144                                         writeb(op, dst + (x / 4));
1145                                 }
1146                         }
1147                         dst += (64*2)/8;
1148                 }
1149         }
1150
1151         sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1152         return 0;
1153 }
1154
1155 /* sm501fb_crtsrc_show
1156  *
1157  * device attribute code to show where the crt output is sourced from
1158 */
1159
1160 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1161                                struct device_attribute *attr, char *buf)
1162 {
1163         struct sm501fb_info *info = dev_get_drvdata(dev);
1164         unsigned long ctrl;
1165
1166         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1167         ctrl &= SM501_DC_CRT_CONTROL_SEL;
1168
1169         return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1170 }
1171
1172 /* sm501fb_crtsrc_show
1173  *
1174  * device attribute code to set where the crt output is sourced from
1175 */
1176
1177 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1178                                 struct device_attribute *attr,
1179                                 const char *buf, size_t len)
1180 {
1181         struct sm501fb_info *info = dev_get_drvdata(dev);
1182         enum sm501_controller head;
1183         unsigned long ctrl;
1184
1185         if (len < 1)
1186                 return -EINVAL;
1187
1188         if (strncasecmp(buf, "crt", 3) == 0)
1189                 head = HEAD_CRT;
1190         else if (strncasecmp(buf, "panel", 5) == 0)
1191                 head = HEAD_PANEL;
1192         else
1193                 return -EINVAL;
1194
1195         dev_info(dev, "setting crt source to head %d\n", head);
1196
1197         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1198
1199         if (head == HEAD_CRT) {
1200                 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1201                 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1202                 ctrl |= SM501_DC_CRT_CONTROL_TE;
1203         } else {
1204                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1205                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1206                 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1207         }
1208
1209         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1210         sm501fb_sync_regs(info);
1211
1212         return len;
1213 }
1214
1215 /* Prepare the device_attr for registration with sysfs later */
1216 static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1217
1218 /* sm501fb_show_regs
1219  *
1220  * show the primary sm501 registers
1221 */
1222 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1223                              unsigned int start, unsigned int len)
1224 {
1225         void __iomem *mem = info->regs;
1226         char *buf = ptr;
1227         unsigned int reg;
1228
1229         for (reg = start; reg < (len + start); reg += 4)
1230                 ptr += sprintf(ptr, "%08x = %08x\n", reg,
1231                                 smc501_readl(mem + reg));
1232
1233         return ptr - buf;
1234 }
1235
1236 /* sm501fb_debug_show_crt
1237  *
1238  * show the crt control and cursor registers
1239 */
1240
1241 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1242                                   struct device_attribute *attr, char *buf)
1243 {
1244         struct sm501fb_info *info = dev_get_drvdata(dev);
1245         char *ptr = buf;
1246
1247         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1248         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1249
1250         return ptr - buf;
1251 }
1252
1253 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1254
1255 /* sm501fb_debug_show_pnl
1256  *
1257  * show the panel control and cursor registers
1258 */
1259
1260 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1261                                   struct device_attribute *attr, char *buf)
1262 {
1263         struct sm501fb_info *info = dev_get_drvdata(dev);
1264         char *ptr = buf;
1265
1266         ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1267         ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1268
1269         return ptr - buf;
1270 }
1271
1272 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1273
1274 /* acceleration operations */
1275 static int sm501fb_sync(struct fb_info *info)
1276 {
1277         int count = 1000000;
1278         struct sm501fb_par  *par = info->par;
1279         struct sm501fb_info *fbi = par->info;
1280
1281         /* wait for the 2d engine to be ready */
1282         while ((count > 0) &&
1283                (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1284                 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1285                 count--;
1286
1287         if (count <= 0) {
1288                 dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1289                 return 1;
1290         }
1291         return 0;
1292 }
1293
1294 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1295 {
1296         struct sm501fb_par  *par = info->par;
1297         struct sm501fb_info *fbi = par->info;
1298         int width = area->width;
1299         int height = area->height;
1300         int sx = area->sx;
1301         int sy = area->sy;
1302         int dx = area->dx;
1303         int dy = area->dy;
1304         unsigned long rtl = 0;
1305
1306         /* source clip */
1307         if ((sx >= info->var.xres_virtual) ||
1308             (sy >= info->var.yres_virtual))
1309                 /* source Area not within virtual screen, skipping */
1310                 return;
1311         if ((sx + width) >= info->var.xres_virtual)
1312                 width = info->var.xres_virtual - sx - 1;
1313         if ((sy + height) >= info->var.yres_virtual)
1314                 height = info->var.yres_virtual - sy - 1;
1315
1316         /* dest clip */
1317         if ((dx >= info->var.xres_virtual) ||
1318             (dy >= info->var.yres_virtual))
1319                 /* Destination Area not within virtual screen, skipping */
1320                 return;
1321         if ((dx + width) >= info->var.xres_virtual)
1322                 width = info->var.xres_virtual - dx - 1;
1323         if ((dy + height) >= info->var.yres_virtual)
1324                 height = info->var.yres_virtual - dy - 1;
1325
1326         if ((sx < dx) || (sy < dy)) {
1327                 rtl = 1 << 27;
1328                 sx += width - 1;
1329                 dx += width - 1;
1330                 sy += height - 1;
1331                 dy += height - 1;
1332         }
1333
1334         if (sm501fb_sync(info))
1335                 return;
1336
1337         /* set the base addresses */
1338         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1339         smc501_writel(par->screen.sm_addr,
1340                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1341
1342         /* set the window width */
1343         smc501_writel((info->var.xres << 16) | info->var.xres,
1344                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1345
1346         /* set window stride */
1347         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1348                fbi->regs2d + SM501_2D_PITCH);
1349
1350         /* set data format */
1351         switch (info->var.bits_per_pixel) {
1352         case 8:
1353                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1354                 break;
1355         case 16:
1356                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1357                 break;
1358         case 32:
1359                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1360                 break;
1361         }
1362
1363         /* 2d compare mask */
1364         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1365
1366         /* 2d mask */
1367         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1368
1369         /* source and destination x y */
1370         smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1371         smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1372
1373         /* w/h */
1374         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1375
1376         /* do area move */
1377         smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1378 }
1379
1380 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1381 {
1382         struct sm501fb_par  *par = info->par;
1383         struct sm501fb_info *fbi = par->info;
1384         int width = rect->width, height = rect->height;
1385
1386         if ((rect->dx >= info->var.xres_virtual) ||
1387             (rect->dy >= info->var.yres_virtual))
1388                 /* Rectangle not within virtual screen, skipping */
1389                 return;
1390         if ((rect->dx + width) >= info->var.xres_virtual)
1391                 width = info->var.xres_virtual - rect->dx - 1;
1392         if ((rect->dy + height) >= info->var.yres_virtual)
1393                 height = info->var.yres_virtual - rect->dy - 1;
1394
1395         if (sm501fb_sync(info))
1396                 return;
1397
1398         /* set the base addresses */
1399         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1400         smc501_writel(par->screen.sm_addr,
1401                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1402
1403         /* set the window width */
1404         smc501_writel((info->var.xres << 16) | info->var.xres,
1405                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1406
1407         /* set window stride */
1408         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1409                fbi->regs2d + SM501_2D_PITCH);
1410
1411         /* set data format */
1412         switch (info->var.bits_per_pixel) {
1413         case 8:
1414                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1415                 break;
1416         case 16:
1417                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1418                 break;
1419         case 32:
1420                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1421                 break;
1422         }
1423
1424         /* 2d compare mask */
1425         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1426
1427         /* 2d mask */
1428         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1429
1430         /* colour */
1431         smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1432
1433         /* x y */
1434         smc501_writel((rect->dx << 16) | rect->dy,
1435                         fbi->regs2d + SM501_2D_DESTINATION);
1436
1437         /* w/h */
1438         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1439
1440         /* do rectangle fill */
1441         smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1442 }
1443
1444
1445 static struct fb_ops sm501fb_ops_crt = {
1446         .owner          = THIS_MODULE,
1447         .fb_check_var   = sm501fb_check_var_crt,
1448         .fb_set_par     = sm501fb_set_par_crt,
1449         .fb_blank       = sm501fb_blank_crt,
1450         .fb_setcolreg   = sm501fb_setcolreg,
1451         .fb_pan_display = sm501fb_pan_crt,
1452         .fb_cursor      = sm501fb_cursor,
1453         .fb_fillrect    = sm501fb_fillrect,
1454         .fb_copyarea    = sm501fb_copyarea,
1455         .fb_imageblit   = cfb_imageblit,
1456         .fb_sync        = sm501fb_sync,
1457 };
1458
1459 static struct fb_ops sm501fb_ops_pnl = {
1460         .owner          = THIS_MODULE,
1461         .fb_check_var   = sm501fb_check_var_pnl,
1462         .fb_set_par     = sm501fb_set_par_pnl,
1463         .fb_pan_display = sm501fb_pan_pnl,
1464         .fb_blank       = sm501fb_blank_pnl,
1465         .fb_setcolreg   = sm501fb_setcolreg,
1466         .fb_cursor      = sm501fb_cursor,
1467         .fb_fillrect    = sm501fb_fillrect,
1468         .fb_copyarea    = sm501fb_copyarea,
1469         .fb_imageblit   = cfb_imageblit,
1470         .fb_sync        = sm501fb_sync,
1471 };
1472
1473 /* sm501_init_cursor
1474  *
1475  * initialise hw cursor parameters
1476 */
1477
1478 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1479 {
1480         struct sm501fb_par *par;
1481         struct sm501fb_info *info;
1482         int ret;
1483
1484         if (fbi == NULL)
1485                 return 0;
1486
1487         par = fbi->par;
1488         info = par->info;
1489
1490         par->cursor_regs = info->regs + reg_base;
1491
1492         ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1493                               fbi->fix.smem_len);
1494         if (ret < 0)
1495                 return ret;
1496
1497         /* initialise the colour registers */
1498
1499         smc501_writel(par->cursor.sm_addr,
1500                         par->cursor_regs + SM501_OFF_HWC_ADDR);
1501
1502         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1503         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1504         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1505         sm501fb_sync_regs(info);
1506
1507         return 0;
1508 }
1509
1510 /* sm501fb_info_start
1511  *
1512  * fills the par structure claiming resources and remapping etc.
1513 */
1514
1515 static int sm501fb_start(struct sm501fb_info *info,
1516                          struct platform_device *pdev)
1517 {
1518         struct resource *res;
1519         struct device *dev = &pdev->dev;
1520         int k;
1521         int ret;
1522
1523         info->irq = ret = platform_get_irq(pdev, 0);
1524         if (ret < 0) {
1525                 /* we currently do not use the IRQ */
1526                 dev_warn(dev, "no irq for device\n");
1527         }
1528
1529         /* allocate, reserve and remap resources for display
1530          * controller registers */
1531         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1532         if (res == NULL) {
1533                 dev_err(dev, "no resource definition for registers\n");
1534                 ret = -ENOENT;
1535                 goto err_release;
1536         }
1537
1538         info->regs_res = request_mem_region(res->start,
1539                                             resource_size(res),
1540                                             pdev->name);
1541
1542         if (info->regs_res == NULL) {
1543                 dev_err(dev, "cannot claim registers\n");
1544                 ret = -ENXIO;
1545                 goto err_release;
1546         }
1547
1548         info->regs = ioremap(res->start, resource_size(res));
1549         if (info->regs == NULL) {
1550                 dev_err(dev, "cannot remap registers\n");
1551                 ret = -ENXIO;
1552                 goto err_regs_res;
1553         }
1554
1555         /* allocate, reserve and remap resources for 2d
1556          * controller registers */
1557         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1558         if (res == NULL) {
1559                 dev_err(dev, "no resource definition for 2d registers\n");
1560                 ret = -ENOENT;
1561                 goto err_regs_map;
1562         }
1563
1564         info->regs2d_res = request_mem_region(res->start,
1565                                               resource_size(res),
1566                                               pdev->name);
1567
1568         if (info->regs2d_res == NULL) {
1569                 dev_err(dev, "cannot claim registers\n");
1570                 ret = -ENXIO;
1571                 goto err_regs_map;
1572         }
1573
1574         info->regs2d = ioremap(res->start, resource_size(res));
1575         if (info->regs2d == NULL) {
1576                 dev_err(dev, "cannot remap registers\n");
1577                 ret = -ENXIO;
1578                 goto err_regs2d_res;
1579         }
1580
1581         /* allocate, reserve resources for framebuffer */
1582         res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1583         if (res == NULL) {
1584                 dev_err(dev, "no memory resource defined\n");
1585                 ret = -ENXIO;
1586                 goto err_regs2d_map;
1587         }
1588
1589         info->fbmem_res = request_mem_region(res->start,
1590                                              resource_size(res),
1591                                              pdev->name);
1592         if (info->fbmem_res == NULL) {
1593                 dev_err(dev, "cannot claim framebuffer\n");
1594                 ret = -ENXIO;
1595                 goto err_regs2d_map;
1596         }
1597
1598         info->fbmem = ioremap(res->start, resource_size(res));
1599         if (info->fbmem == NULL) {
1600                 dev_err(dev, "cannot remap framebuffer\n");
1601                 ret = -ENXIO;
1602                 goto err_mem_res;
1603         }
1604
1605         info->fbmem_len = resource_size(res);
1606
1607         /* clear framebuffer memory - avoids garbage data on unused fb */
1608         memset_io(info->fbmem, 0, info->fbmem_len);
1609
1610         /* clear palette ram - undefined at power on */
1611         for (k = 0; k < (256 * 3); k++)
1612                 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1613
1614         /* enable display controller */
1615         sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1616
1617         /* enable 2d controller */
1618         sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1619
1620         /* setup cursors */
1621         sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1622         sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1623
1624         return 0; /* everything is setup */
1625
1626  err_mem_res:
1627         release_mem_region(info->fbmem_res->start,
1628                            resource_size(info->fbmem_res));
1629
1630  err_regs2d_map:
1631         iounmap(info->regs2d);
1632
1633  err_regs2d_res:
1634         release_mem_region(info->regs2d_res->start,
1635                            resource_size(info->regs2d_res));
1636
1637  err_regs_map:
1638         iounmap(info->regs);
1639
1640  err_regs_res:
1641         release_mem_region(info->regs_res->start,
1642                            resource_size(info->regs_res));
1643
1644  err_release:
1645         return ret;
1646 }
1647
1648 static void sm501fb_stop(struct sm501fb_info *info)
1649 {
1650         /* disable display controller */
1651         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1652
1653         iounmap(info->fbmem);
1654         release_mem_region(info->fbmem_res->start,
1655                            resource_size(info->fbmem_res));
1656
1657         iounmap(info->regs2d);
1658         release_mem_region(info->regs2d_res->start,
1659                            resource_size(info->regs2d_res));
1660
1661         iounmap(info->regs);
1662         release_mem_region(info->regs_res->start,
1663                            resource_size(info->regs_res));
1664 }
1665
1666 static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
1667                            const char *fbname)
1668 {
1669         struct sm501_platdata_fbsub *pd;
1670         struct sm501fb_par *par = fb->par;
1671         struct sm501fb_info *info = par->info;
1672         unsigned long ctrl;
1673         unsigned int enable;
1674         int ret;
1675
1676         switch (head) {
1677         case HEAD_CRT:
1678                 pd = info->pdata->fb_crt;
1679                 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1680                 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1681
1682                 /* ensure we set the correct source register */
1683                 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1684                         ctrl |= SM501_DC_CRT_CONTROL_SEL;
1685                         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1686                 }
1687
1688                 break;
1689
1690         case HEAD_PANEL:
1691                 pd = info->pdata->fb_pnl;
1692                 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1693                 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1694                 break;
1695
1696         default:
1697                 pd = NULL;              /* stop compiler warnings */
1698                 ctrl = 0;
1699                 enable = 0;
1700                 BUG();
1701         }
1702
1703         dev_info(info->dev, "fb %s %sabled at start\n",
1704                  fbname, enable ? "en" : "dis");
1705
1706         /* check to see if our routing allows this */
1707
1708         if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1709                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1710                 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1711                 enable = 0;
1712         }
1713
1714         strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1715
1716         memcpy(&par->ops,
1717                (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1718                sizeof(struct fb_ops));
1719
1720         /* update ops dependent on what we've been passed */
1721
1722         if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1723                 par->ops.fb_cursor = NULL;
1724
1725         fb->fbops = &par->ops;
1726         fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1727                 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1728                 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1729
1730 #if defined(CONFIG_OF)
1731 #ifdef __BIG_ENDIAN
1732         if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
1733                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1734 #else
1735         if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
1736                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1737 #endif
1738 #endif
1739         /* fixed data */
1740
1741         fb->fix.type            = FB_TYPE_PACKED_PIXELS;
1742         fb->fix.type_aux        = 0;
1743         fb->fix.xpanstep        = 1;
1744         fb->fix.ypanstep        = 1;
1745         fb->fix.ywrapstep       = 0;
1746         fb->fix.accel           = FB_ACCEL_NONE;
1747
1748         /* screenmode */
1749
1750         fb->var.nonstd          = 0;
1751         fb->var.activate        = FB_ACTIVATE_NOW;
1752         fb->var.accel_flags     = 0;
1753         fb->var.vmode           = FB_VMODE_NONINTERLACED;
1754         fb->var.bits_per_pixel  = 16;
1755
1756         if (info->edid_data) {
1757                         /* Now build modedb from EDID */
1758                         fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1759                         fb_videomode_to_modelist(fb->monspecs.modedb,
1760                                                  fb->monspecs.modedb_len,
1761                                                  &fb->modelist);
1762         }
1763
1764         if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1765                 /* TODO read the mode from the current display */
1766         } else {
1767                 if (pd->def_mode) {
1768                         dev_info(info->dev, "using supplied mode\n");
1769                         fb_videomode_to_var(&fb->var, pd->def_mode);
1770
1771                         fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1772                         fb->var.xres_virtual = fb->var.xres;
1773                         fb->var.yres_virtual = fb->var.yres;
1774                 } else {
1775                         if (info->edid_data) {
1776                                 ret = fb_find_mode(&fb->var, fb, fb_mode,
1777                                         fb->monspecs.modedb,
1778                                         fb->monspecs.modedb_len,
1779                                         &sm501_default_mode, default_bpp);
1780                                 /* edid_data is no longer needed, free it */
1781                                 kfree(info->edid_data);
1782                         } else {
1783                                 ret = fb_find_mode(&fb->var, fb,
1784                                            NULL, NULL, 0, NULL, 8);
1785                         }
1786
1787                         switch (ret) {
1788                         case 1:
1789                                 dev_info(info->dev, "using mode specified in "
1790                                                 "@mode\n");
1791                                 break;
1792                         case 2:
1793                                 dev_info(info->dev, "using mode specified in "
1794                                         "@mode with ignored refresh rate\n");
1795                                 break;
1796                         case 3:
1797                                 dev_info(info->dev, "using mode default "
1798                                         "mode\n");
1799                                 break;
1800                         case 4:
1801                                 dev_info(info->dev, "using mode from list\n");
1802                                 break;
1803                         default:
1804                                 dev_info(info->dev, "ret = %d\n", ret);
1805                                 dev_info(info->dev, "failed to find mode\n");
1806                                 return -EINVAL;
1807                         }
1808                 }
1809         }
1810
1811         /* initialise and set the palette */
1812         if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1813                 dev_err(info->dev, "failed to allocate cmap memory\n");
1814                 return -ENOMEM;
1815         }
1816         fb_set_cmap(&fb->cmap, fb);
1817
1818         ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1819         if (ret)
1820                 dev_err(info->dev, "check_var() failed on initial setup?\n");
1821
1822         return 0;
1823 }
1824
1825 /* default platform data if none is supplied (ie, PCI device) */
1826
1827 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1828         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1829                            SM501FB_FLAG_USE_HWCURSOR |
1830                            SM501FB_FLAG_USE_HWACCEL |
1831                            SM501FB_FLAG_DISABLE_AT_EXIT),
1832
1833 };
1834
1835 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1836         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1837                            SM501FB_FLAG_USE_HWCURSOR |
1838                            SM501FB_FLAG_USE_HWACCEL |
1839                            SM501FB_FLAG_DISABLE_AT_EXIT),
1840 };
1841
1842 static struct sm501_platdata_fb sm501fb_def_pdata = {
1843         .fb_route               = SM501_FB_OWN,
1844         .fb_crt                 = &sm501fb_pdata_crt,
1845         .fb_pnl                 = &sm501fb_pdata_pnl,
1846 };
1847
1848 static char driver_name_crt[] = "sm501fb-crt";
1849 static char driver_name_pnl[] = "sm501fb-panel";
1850
1851 static int sm501fb_probe_one(struct sm501fb_info *info,
1852                              enum sm501_controller head)
1853 {
1854         unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1855         struct sm501_platdata_fbsub *pd;
1856         struct sm501fb_par *par;
1857         struct fb_info *fbi;
1858
1859         pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1860
1861         /* Do not initialise if we've not been given any platform data */
1862         if (pd == NULL) {
1863                 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1864                 return 0;
1865         }
1866
1867         fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1868         if (!fbi)
1869                 return -ENOMEM;
1870
1871         par = fbi->par;
1872         par->info = info;
1873         par->head = head;
1874         fbi->pseudo_palette = &par->pseudo_palette;
1875
1876         info->fb[head] = fbi;
1877
1878         return 0;
1879 }
1880
1881 /* Free up anything allocated by sm501fb_init_fb */
1882
1883 static void sm501_free_init_fb(struct sm501fb_info *info,
1884                                 enum sm501_controller head)
1885 {
1886         struct fb_info *fbi = info->fb[head];
1887
1888         if (!fbi)
1889                 return;
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         info = kzalloc(sizeof(*info), GFP_KERNEL);
1931         if (!info) {
1932                 dev_err(dev, "failed to allocate state\n");
1933                 return -ENOMEM;
1934         }
1935
1936         info->dev = dev = &pdev->dev;
1937         platform_set_drvdata(pdev, info);
1938
1939         if (dev->parent->platform_data) {
1940                 struct sm501_platdata *pd = dev->parent->platform_data;
1941                 info->pdata = pd->fb;
1942         }
1943
1944         if (info->pdata == NULL) {
1945                 int found = 0;
1946 #if defined(CONFIG_OF)
1947                 struct device_node *np = pdev->dev.parent->of_node;
1948                 const u8 *prop;
1949                 const char *cp;
1950                 int len;
1951
1952                 info->pdata = &sm501fb_def_pdata;
1953                 if (np) {
1954                         /* Get EDID */
1955                         cp = of_get_property(np, "mode", &len);
1956                         if (cp)
1957                                 strcpy(fb_mode, cp);
1958                         prop = of_get_property(np, "edid", &len);
1959                         if (prop && len == EDID_LENGTH) {
1960                                 info->edid_data = kmemdup(prop, EDID_LENGTH,
1961                                                           GFP_KERNEL);
1962                                 if (info->edid_data)
1963                                         found = 1;
1964                         }
1965                 }
1966 #endif
1967                 if (!found) {
1968                         dev_info(dev, "using default configuration data\n");
1969                         info->pdata = &sm501fb_def_pdata;
1970                 }
1971         }
1972
1973         /* probe for the presence of each panel */
1974
1975         ret = sm501fb_probe_one(info, HEAD_CRT);
1976         if (ret < 0) {
1977                 dev_err(dev, "failed to probe CRT\n");
1978                 goto err_alloc;
1979         }
1980
1981         ret = sm501fb_probe_one(info, HEAD_PANEL);
1982         if (ret < 0) {
1983                 dev_err(dev, "failed to probe PANEL\n");
1984                 goto err_probed_crt;
1985         }
1986
1987         if (info->fb[HEAD_PANEL] == NULL &&
1988             info->fb[HEAD_CRT] == NULL) {
1989                 dev_err(dev, "no framebuffers found\n");
1990                 ret = -ENODEV;
1991                 goto err_alloc;
1992         }
1993
1994         /* get the resources for both of the framebuffers */
1995
1996         ret = sm501fb_start(info, pdev);
1997         if (ret) {
1998                 dev_err(dev, "cannot initialise SM501\n");
1999                 goto err_probed_panel;
2000         }
2001
2002         ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2003         if (ret) {
2004                 dev_err(dev, "failed to start CRT\n");
2005                 goto err_started;
2006         }
2007
2008         ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2009         if (ret) {
2010                 dev_err(dev, "failed to start Panel\n");
2011                 goto err_started_crt;
2012         }
2013
2014         /* create device files */
2015
2016         ret = device_create_file(dev, &dev_attr_crt_src);
2017         if (ret)
2018                 goto err_started_panel;
2019
2020         ret = device_create_file(dev, &dev_attr_fbregs_pnl);
2021         if (ret)
2022                 goto err_attached_crtsrc_file;
2023
2024         ret = device_create_file(dev, &dev_attr_fbregs_crt);
2025         if (ret)
2026                 goto err_attached_pnlregs_file;
2027
2028         /* we registered, return ok */
2029         return 0;
2030
2031 err_attached_pnlregs_file:
2032         device_remove_file(dev, &dev_attr_fbregs_pnl);
2033
2034 err_attached_crtsrc_file:
2035         device_remove_file(dev, &dev_attr_crt_src);
2036
2037 err_started_panel:
2038         unregister_framebuffer(info->fb[HEAD_PANEL]);
2039         sm501_free_init_fb(info, HEAD_PANEL);
2040
2041 err_started_crt:
2042         unregister_framebuffer(info->fb[HEAD_CRT]);
2043         sm501_free_init_fb(info, HEAD_CRT);
2044
2045 err_started:
2046         sm501fb_stop(info);
2047
2048 err_probed_panel:
2049         framebuffer_release(info->fb[HEAD_PANEL]);
2050
2051 err_probed_crt:
2052         framebuffer_release(info->fb[HEAD_CRT]);
2053
2054 err_alloc:
2055         kfree(info);
2056
2057         return ret;
2058 }
2059
2060
2061 /*
2062  *  Cleanup
2063  */
2064 static int sm501fb_remove(struct platform_device *pdev)
2065 {
2066         struct sm501fb_info *info = platform_get_drvdata(pdev);
2067         struct fb_info     *fbinfo_crt = info->fb[0];
2068         struct fb_info     *fbinfo_pnl = info->fb[1];
2069
2070         device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
2071         device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
2072         device_remove_file(&pdev->dev, &dev_attr_crt_src);
2073
2074         sm501_free_init_fb(info, HEAD_CRT);
2075         sm501_free_init_fb(info, HEAD_PANEL);
2076
2077         if (fbinfo_crt)
2078                 unregister_framebuffer(fbinfo_crt);
2079         if (fbinfo_pnl)
2080                 unregister_framebuffer(fbinfo_pnl);
2081
2082         sm501fb_stop(info);
2083         kfree(info);
2084
2085         framebuffer_release(fbinfo_pnl);
2086         framebuffer_release(fbinfo_crt);
2087
2088         return 0;
2089 }
2090
2091 #ifdef CONFIG_PM
2092
2093 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2094                               enum sm501_controller head)
2095 {
2096         struct fb_info *fbi = info->fb[head];
2097         struct sm501fb_par *par;
2098
2099         if (!fbi)
2100                 return 0;
2101
2102         par = fbi->par;
2103         if (par->screen.size == 0)
2104                 return 0;
2105
2106         /* blank the relevant interface to ensure unit power minimised */
2107         (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2108
2109         /* tell console/fb driver we are suspending */
2110
2111         console_lock();
2112         fb_set_suspend(fbi, 1);
2113         console_unlock();
2114
2115         /* backup copies in case chip is powered down over suspend */
2116
2117         par->store_fb = vmalloc(par->screen.size);
2118         if (par->store_fb == NULL) {
2119                 dev_err(info->dev, "no memory to store screen\n");
2120                 return -ENOMEM;
2121         }
2122
2123         par->store_cursor = vmalloc(par->cursor.size);
2124         if (par->store_cursor == NULL) {
2125                 dev_err(info->dev, "no memory to store cursor\n");
2126                 goto err_nocursor;
2127         }
2128
2129         dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2130         dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2131
2132         memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2133         memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2134
2135         return 0;
2136
2137  err_nocursor:
2138         vfree(par->store_fb);
2139         par->store_fb = NULL;
2140
2141         return -ENOMEM;
2142 }
2143
2144 static void sm501fb_resume_fb(struct sm501fb_info *info,
2145                               enum sm501_controller head)
2146 {
2147         struct fb_info *fbi = info->fb[head];
2148         struct sm501fb_par *par;
2149
2150         if (!fbi)
2151                 return;
2152
2153         par = fbi->par;
2154         if (par->screen.size == 0)
2155                 return;
2156
2157         /* re-activate the configuration */
2158
2159         (par->ops.fb_set_par)(fbi);
2160
2161         /* restore the data */
2162
2163         dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2164         dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2165
2166         if (par->store_fb)
2167                 memcpy_toio(par->screen.k_addr, par->store_fb,
2168                             par->screen.size);
2169
2170         if (par->store_cursor)
2171                 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2172                             par->cursor.size);
2173
2174         console_lock();
2175         fb_set_suspend(fbi, 0);
2176         console_unlock();
2177
2178         vfree(par->store_fb);
2179         vfree(par->store_cursor);
2180 }
2181
2182
2183 /* suspend and resume support */
2184
2185 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2186 {
2187         struct sm501fb_info *info = platform_get_drvdata(pdev);
2188
2189         /* store crt control to resume with */
2190         info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2191
2192         sm501fb_suspend_fb(info, HEAD_CRT);
2193         sm501fb_suspend_fb(info, HEAD_PANEL);
2194
2195         /* turn off the clocks, in case the device is not powered down */
2196         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2197
2198         return 0;
2199 }
2200
2201 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
2202                              SM501_DC_CRT_CONTROL_SEL)
2203
2204
2205 static int sm501fb_resume(struct platform_device *pdev)
2206 {
2207         struct sm501fb_info *info = platform_get_drvdata(pdev);
2208         unsigned long crt_ctrl;
2209
2210         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2211
2212         /* restore the items we want to be saved for crt control */
2213
2214         crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2215         crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2216         crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2217         smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2218
2219         sm501fb_resume_fb(info, HEAD_CRT);
2220         sm501fb_resume_fb(info, HEAD_PANEL);
2221
2222         return 0;
2223 }
2224
2225 #else
2226 #define sm501fb_suspend NULL
2227 #define sm501fb_resume  NULL
2228 #endif
2229
2230 static struct platform_driver sm501fb_driver = {
2231         .probe          = sm501fb_probe,
2232         .remove         = sm501fb_remove,
2233         .suspend        = sm501fb_suspend,
2234         .resume         = sm501fb_resume,
2235         .driver         = {
2236                 .name   = "sm501-fb",
2237         },
2238 };
2239
2240 module_platform_driver(sm501fb_driver);
2241
2242 module_param_named(mode, fb_mode, charp, 0);
2243 MODULE_PARM_DESC(mode,
2244         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2245 module_param_named(bpp, default_bpp, ulong, 0);
2246 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2247 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2248 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2249 MODULE_LICENSE("GPL v2");