linux/drivers/video/sm501fb.c
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   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
  46static char *fb_mode = "640x480-16@60";
  47static unsigned long default_bpp = 16;
  48
  49static 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
  66enum 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 */
  77struct 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* */
  84struct 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 */
 104struct 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
 120static 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
 126static 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
 139static 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
 170static 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
 259static 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
 278static 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
 296static 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
 406static 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
 418static 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
 429static 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
 526static 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
 580static 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
 610static 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
 632static 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
 715static 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
 802static 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
 901static 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
 914static 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
 966static 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
 997static 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
1040static 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
1162static 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
1179static 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 (strnicmp(buf, "crt", 3) == 0)
1191                head = HEAD_CRT;
1192        else if (strnicmp(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 */
1218static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1219
1220/* sm501fb_show_regs
1221 *
1222 * show the primary sm501 registers
1223*/
1224static 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
1243static 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
1255static 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
1262static 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
1274static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1275
1276/* acceleration operations */
1277static 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
1296static 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
1382static 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
1447static 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
1461static 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
1480static 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
1517static 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(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
1649static 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
1667static 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
1828static 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
1836static 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
1843static 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
1849static char driver_name_crt[] = "sm501fb-crt";
1850static char driver_name_pnl[] = "sm501fb-panel";
1851
1852static 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
1886static 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
1894static 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
1923static 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                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
2031err_attached_pnlregs_file:
2032        device_remove_file(dev, &dev_attr_fbregs_pnl);
2033
2034err_attached_crtsrc_file:
2035        device_remove_file(dev, &dev_attr_crt_src);
2036
2037err_started_panel:
2038        unregister_framebuffer(info->fb[HEAD_PANEL]);
2039        sm501_free_init_fb(info, HEAD_PANEL);
2040
2041err_started_crt:
2042        unregister_framebuffer(info->fb[HEAD_CRT]);
2043        sm501_free_init_fb(info, HEAD_CRT);
2044
2045err_started:
2046        sm501fb_stop(info);
2047
2048err_probed_panel:
2049        framebuffer_release(info->fb[HEAD_PANEL]);
2050
2051err_probed_crt:
2052        framebuffer_release(info->fb[HEAD_CRT]);
2053
2054err_alloc:
2055        kfree(info);
2056
2057        return ret;
2058}
2059
2060
2061/*
2062 *  Cleanup
2063 */
2064static 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        unregister_framebuffer(fbinfo_crt);
2078        unregister_framebuffer(fbinfo_pnl);
2079
2080        sm501fb_stop(info);
2081        kfree(info);
2082
2083        framebuffer_release(fbinfo_pnl);
2084        framebuffer_release(fbinfo_crt);
2085
2086        return 0;
2087}
2088
2089#ifdef CONFIG_PM
2090
2091static int sm501fb_suspend_fb(struct sm501fb_info *info,
2092                              enum sm501_controller head)
2093{
2094        struct fb_info *fbi = info->fb[head];
2095        struct sm501fb_par *par = fbi->par;
2096
2097        if (par->screen.size == 0)
2098                return 0;
2099
2100        /* blank the relevant interface to ensure unit power minimised */
2101        (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2102
2103        /* tell console/fb driver we are suspending */
2104
2105        console_lock();
2106        fb_set_suspend(fbi, 1);
2107        console_unlock();
2108
2109        /* backup copies in case chip is powered down over suspend */
2110
2111        par->store_fb = vmalloc(par->screen.size);
2112        if (par->store_fb == NULL) {
2113                dev_err(info->dev, "no memory to store screen\n");
2114                return -ENOMEM;
2115        }
2116
2117        par->store_cursor = vmalloc(par->cursor.size);
2118        if (par->store_cursor == NULL) {
2119                dev_err(info->dev, "no memory to store cursor\n");
2120                goto err_nocursor;
2121        }
2122
2123        dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2124        dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2125
2126        memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2127        memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2128
2129        return 0;
2130
2131 err_nocursor:
2132        vfree(par->store_fb);
2133        par->store_fb = NULL;
2134
2135        return -ENOMEM;
2136}
2137
2138static void sm501fb_resume_fb(struct sm501fb_info *info,
2139                              enum sm501_controller head)
2140{
2141        struct fb_info *fbi = info->fb[head];
2142        struct sm501fb_par *par = fbi->par;
2143
2144        if (par->screen.size == 0)
2145                return;
2146
2147        /* re-activate the configuration */
2148
2149        (par->ops.fb_set_par)(fbi);
2150
2151        /* restore the data */
2152
2153        dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2154        dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2155
2156        if (par->store_fb)
2157                memcpy_toio(par->screen.k_addr, par->store_fb,
2158                            par->screen.size);
2159
2160        if (par->store_cursor)
2161                memcpy_toio(par->cursor.k_addr, par->store_cursor,
2162                            par->cursor.size);
2163
2164        console_lock();
2165        fb_set_suspend(fbi, 0);
2166        console_unlock();
2167
2168        vfree(par->store_fb);
2169        vfree(par->store_cursor);
2170}
2171
2172
2173/* suspend and resume support */
2174
2175static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2176{
2177        struct sm501fb_info *info = platform_get_drvdata(pdev);
2178
2179        /* store crt control to resume with */
2180        info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2181
2182        sm501fb_suspend_fb(info, HEAD_CRT);
2183        sm501fb_suspend_fb(info, HEAD_PANEL);
2184
2185        /* turn off the clocks, in case the device is not powered down */
2186        sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2187
2188        return 0;
2189}
2190
2191#define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
2192                             SM501_DC_CRT_CONTROL_SEL)
2193
2194
2195static int sm501fb_resume(struct platform_device *pdev)
2196{
2197        struct sm501fb_info *info = platform_get_drvdata(pdev);
2198        unsigned long crt_ctrl;
2199
2200        sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2201
2202        /* restore the items we want to be saved for crt control */
2203
2204        crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2205        crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2206        crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2207        smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2208
2209        sm501fb_resume_fb(info, HEAD_CRT);
2210        sm501fb_resume_fb(info, HEAD_PANEL);
2211
2212        return 0;
2213}
2214
2215#else
2216#define sm501fb_suspend NULL
2217#define sm501fb_resume  NULL
2218#endif
2219
2220static struct platform_driver sm501fb_driver = {
2221        .probe          = sm501fb_probe,
2222        .remove         = sm501fb_remove,
2223        .suspend        = sm501fb_suspend,
2224        .resume         = sm501fb_resume,
2225        .driver         = {
2226                .name   = "sm501-fb",
2227                .owner  = THIS_MODULE,
2228        },
2229};
2230
2231module_platform_driver(sm501fb_driver);
2232
2233module_param_named(mode, fb_mode, charp, 0);
2234MODULE_PARM_DESC(mode,
2235        "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2236module_param_named(bpp, default_bpp, ulong, 0);
2237MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2238MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2239MODULE_DESCRIPTION("SM501 Framebuffer driver");
2240MODULE_LICENSE("GPL v2");
2241
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