linux/drivers/video/fbdev/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 <linux/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 const 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                /* fall through */
1012
1013        case FB_BLANK_NORMAL:
1014                ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1015                break;
1016
1017        case FB_BLANK_UNBLANK:
1018                ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1019                ctrl |=  SM501_DC_CRT_CONTROL_ENABLE;
1020                sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1021                break;
1022
1023        case FB_BLANK_VSYNC_SUSPEND:
1024        case FB_BLANK_HSYNC_SUSPEND:
1025        default:
1026                return 1;
1027
1028        }
1029
1030        smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1031        sm501fb_sync_regs(fbi);
1032
1033        return 0;
1034}
1035
1036/* sm501fb_cursor
1037 *
1038 * set or change the hardware cursor parameters
1039*/
1040
1041static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1042{
1043        struct sm501fb_par  *par = info->par;
1044        struct sm501fb_info *fbi = par->info;
1045        void __iomem *base = fbi->regs;
1046        unsigned long hwc_addr;
1047        unsigned long fg, bg;
1048
1049        dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1050
1051        if (par->head == HEAD_CRT)
1052                base += SM501_DC_CRT_HWC_BASE;
1053        else
1054                base += SM501_DC_PANEL_HWC_BASE;
1055
1056        /* check not being asked to exceed capabilities */
1057
1058        if (cursor->image.width > 64)
1059                return -EINVAL;
1060
1061        if (cursor->image.height > 64)
1062                return -EINVAL;
1063
1064        if (cursor->image.depth > 1)
1065                return -EINVAL;
1066
1067        hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1068
1069        if (cursor->enable)
1070                smc501_writel(hwc_addr | SM501_HWC_EN,
1071                                base + SM501_OFF_HWC_ADDR);
1072        else
1073                smc501_writel(hwc_addr & ~SM501_HWC_EN,
1074                                base + SM501_OFF_HWC_ADDR);
1075
1076        /* set data */
1077        if (cursor->set & FB_CUR_SETPOS) {
1078                unsigned int x = cursor->image.dx;
1079                unsigned int y = cursor->image.dy;
1080
1081                if (x >= 2048 || y >= 2048 )
1082                        return -EINVAL;
1083
1084                dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1085
1086                //y += cursor->image.height;
1087
1088                smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1089        }
1090
1091        if (cursor->set & FB_CUR_SETCMAP) {
1092                unsigned int bg_col = cursor->image.bg_color;
1093                unsigned int fg_col = cursor->image.fg_color;
1094
1095                dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1096                        __func__, bg_col, fg_col);
1097
1098                bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1099                        ((info->cmap.green[bg_col] & 0xFC) << 3) |
1100                        ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1101
1102                fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1103                        ((info->cmap.green[fg_col] & 0xFC) << 3) |
1104                        ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1105
1106                dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1107
1108                smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1109                smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1110        }
1111
1112        if (cursor->set & FB_CUR_SETSIZE ||
1113            cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1114                /* SM501 cursor is a two bpp 64x64 bitmap this routine
1115                 * clears it to transparent then combines the cursor
1116                 * shape plane with the colour plane to set the
1117                 * cursor */
1118                int x, y;
1119                const unsigned char *pcol = cursor->image.data;
1120                const unsigned char *pmsk = cursor->mask;
1121                void __iomem   *dst = par->cursor.k_addr;
1122                unsigned char  dcol = 0;
1123                unsigned char  dmsk = 0;
1124                unsigned int   op;
1125
1126                dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1127                        __func__, cursor->image.width, cursor->image.height);
1128
1129                for (op = 0; op < (64*64*2)/8; op+=4)
1130                        smc501_writel(0x0, dst + op);
1131
1132                for (y = 0; y < cursor->image.height; y++) {
1133                        for (x = 0; x < cursor->image.width; x++) {
1134                                if ((x % 8) == 0) {
1135                                        dcol = *pcol++;
1136                                        dmsk = *pmsk++;
1137                                } else {
1138                                        dcol >>= 1;
1139                                        dmsk >>= 1;
1140                                }
1141
1142                                if (dmsk & 1) {
1143                                        op = (dcol & 1) ? 1 : 3;
1144                                        op <<= ((x % 4) * 2);
1145
1146                                        op |= readb(dst + (x / 4));
1147                                        writeb(op, dst + (x / 4));
1148                                }
1149                        }
1150                        dst += (64*2)/8;
1151                }
1152        }
1153
1154        sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1155        return 0;
1156}
1157
1158/* sm501fb_crtsrc_show
1159 *
1160 * device attribute code to show where the crt output is sourced from
1161*/
1162
1163static ssize_t sm501fb_crtsrc_show(struct device *dev,
1164                               struct device_attribute *attr, char *buf)
1165{
1166        struct sm501fb_info *info = dev_get_drvdata(dev);
1167        unsigned long ctrl;
1168
1169        ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1170        ctrl &= SM501_DC_CRT_CONTROL_SEL;
1171
1172        return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1173}
1174
1175/* sm501fb_crtsrc_show
1176 *
1177 * device attribute code to set where the crt output is sourced from
1178*/
1179
1180static ssize_t sm501fb_crtsrc_store(struct device *dev,
1181                                struct device_attribute *attr,
1182                                const char *buf, size_t len)
1183{
1184        struct sm501fb_info *info = dev_get_drvdata(dev);
1185        enum sm501_controller head;
1186        unsigned long ctrl;
1187
1188        if (len < 1)
1189                return -EINVAL;
1190
1191        if (strncasecmp(buf, "crt", 3) == 0)
1192                head = HEAD_CRT;
1193        else if (strncasecmp(buf, "panel", 5) == 0)
1194                head = HEAD_PANEL;
1195        else
1196                return -EINVAL;
1197
1198        dev_info(dev, "setting crt source to head %d\n", head);
1199
1200        ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1201
1202        if (head == HEAD_CRT) {
1203                ctrl |= SM501_DC_CRT_CONTROL_SEL;
1204                ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1205                ctrl |= SM501_DC_CRT_CONTROL_TE;
1206        } else {
1207                ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1208                ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1209                ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1210        }
1211
1212        smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1213        sm501fb_sync_regs(info);
1214
1215        return len;
1216}
1217
1218/* Prepare the device_attr for registration with sysfs later */
1219static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1220
1221/* sm501fb_show_regs
1222 *
1223 * show the primary sm501 registers
1224*/
1225static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1226                             unsigned int start, unsigned int len)
1227{
1228        void __iomem *mem = info->regs;
1229        char *buf = ptr;
1230        unsigned int reg;
1231
1232        for (reg = start; reg < (len + start); reg += 4)
1233                ptr += sprintf(ptr, "%08x = %08x\n", reg,
1234                                smc501_readl(mem + reg));
1235
1236        return ptr - buf;
1237}
1238
1239/* sm501fb_debug_show_crt
1240 *
1241 * show the crt control and cursor registers
1242*/
1243
1244static ssize_t sm501fb_debug_show_crt(struct device *dev,
1245                                  struct device_attribute *attr, char *buf)
1246{
1247        struct sm501fb_info *info = dev_get_drvdata(dev);
1248        char *ptr = buf;
1249
1250        ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1251        ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1252
1253        return ptr - buf;
1254}
1255
1256static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1257
1258/* sm501fb_debug_show_pnl
1259 *
1260 * show the panel control and cursor registers
1261*/
1262
1263static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1264                                  struct device_attribute *attr, char *buf)
1265{
1266        struct sm501fb_info *info = dev_get_drvdata(dev);
1267        char *ptr = buf;
1268
1269        ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1270        ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1271
1272        return ptr - buf;
1273}
1274
1275static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1276
1277/* acceleration operations */
1278static int sm501fb_sync(struct fb_info *info)
1279{
1280        int count = 1000000;
1281        struct sm501fb_par  *par = info->par;
1282        struct sm501fb_info *fbi = par->info;
1283
1284        /* wait for the 2d engine to be ready */
1285        while ((count > 0) &&
1286               (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1287                SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1288                count--;
1289
1290        if (count <= 0) {
1291                dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1292                return 1;
1293        }
1294        return 0;
1295}
1296
1297static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1298{
1299        struct sm501fb_par  *par = info->par;
1300        struct sm501fb_info *fbi = par->info;
1301        int width = area->width;
1302        int height = area->height;
1303        int sx = area->sx;
1304        int sy = area->sy;
1305        int dx = area->dx;
1306        int dy = area->dy;
1307        unsigned long rtl = 0;
1308
1309        /* source clip */
1310        if ((sx >= info->var.xres_virtual) ||
1311            (sy >= info->var.yres_virtual))
1312                /* source Area not within virtual screen, skipping */
1313                return;
1314        if ((sx + width) >= info->var.xres_virtual)
1315                width = info->var.xres_virtual - sx - 1;
1316        if ((sy + height) >= info->var.yres_virtual)
1317                height = info->var.yres_virtual - sy - 1;
1318
1319        /* dest clip */
1320        if ((dx >= info->var.xres_virtual) ||
1321            (dy >= info->var.yres_virtual))
1322                /* Destination Area not within virtual screen, skipping */
1323                return;
1324        if ((dx + width) >= info->var.xres_virtual)
1325                width = info->var.xres_virtual - dx - 1;
1326        if ((dy + height) >= info->var.yres_virtual)
1327                height = info->var.yres_virtual - dy - 1;
1328
1329        if ((sx < dx) || (sy < dy)) {
1330                rtl = 1 << 27;
1331                sx += width - 1;
1332                dx += width - 1;
1333                sy += height - 1;
1334                dy += height - 1;
1335        }
1336
1337        if (sm501fb_sync(info))
1338                return;
1339
1340        /* set the base addresses */
1341        smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1342        smc501_writel(par->screen.sm_addr,
1343                        fbi->regs2d + SM501_2D_DESTINATION_BASE);
1344
1345        /* set the window width */
1346        smc501_writel((info->var.xres << 16) | info->var.xres,
1347               fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1348
1349        /* set window stride */
1350        smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1351               fbi->regs2d + SM501_2D_PITCH);
1352
1353        /* set data format */
1354        switch (info->var.bits_per_pixel) {
1355        case 8:
1356                smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1357                break;
1358        case 16:
1359                smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1360                break;
1361        case 32:
1362                smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1363                break;
1364        }
1365
1366        /* 2d compare mask */
1367        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1368
1369        /* 2d mask */
1370        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1371
1372        /* source and destination x y */
1373        smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1374        smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1375
1376        /* w/h */
1377        smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1378
1379        /* do area move */
1380        smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1381}
1382
1383static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1384{
1385        struct sm501fb_par  *par = info->par;
1386        struct sm501fb_info *fbi = par->info;
1387        int width = rect->width, height = rect->height;
1388
1389        if ((rect->dx >= info->var.xres_virtual) ||
1390            (rect->dy >= info->var.yres_virtual))
1391                /* Rectangle not within virtual screen, skipping */
1392                return;
1393        if ((rect->dx + width) >= info->var.xres_virtual)
1394                width = info->var.xres_virtual - rect->dx - 1;
1395        if ((rect->dy + height) >= info->var.yres_virtual)
1396                height = info->var.yres_virtual - rect->dy - 1;
1397
1398        if (sm501fb_sync(info))
1399                return;
1400
1401        /* set the base addresses */
1402        smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1403        smc501_writel(par->screen.sm_addr,
1404                        fbi->regs2d + SM501_2D_DESTINATION_BASE);
1405
1406        /* set the window width */
1407        smc501_writel((info->var.xres << 16) | info->var.xres,
1408               fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1409
1410        /* set window stride */
1411        smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1412               fbi->regs2d + SM501_2D_PITCH);
1413
1414        /* set data format */
1415        switch (info->var.bits_per_pixel) {
1416        case 8:
1417                smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1418                break;
1419        case 16:
1420                smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1421                break;
1422        case 32:
1423                smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1424                break;
1425        }
1426
1427        /* 2d compare mask */
1428        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1429
1430        /* 2d mask */
1431        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1432
1433        /* colour */
1434        smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1435
1436        /* x y */
1437        smc501_writel((rect->dx << 16) | rect->dy,
1438                        fbi->regs2d + SM501_2D_DESTINATION);
1439
1440        /* w/h */
1441        smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1442
1443        /* do rectangle fill */
1444        smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1445}
1446
1447
1448static struct fb_ops sm501fb_ops_crt = {
1449        .owner          = THIS_MODULE,
1450        .fb_check_var   = sm501fb_check_var_crt,
1451        .fb_set_par     = sm501fb_set_par_crt,
1452        .fb_blank       = sm501fb_blank_crt,
1453        .fb_setcolreg   = sm501fb_setcolreg,
1454        .fb_pan_display = sm501fb_pan_crt,
1455        .fb_cursor      = sm501fb_cursor,
1456        .fb_fillrect    = sm501fb_fillrect,
1457        .fb_copyarea    = sm501fb_copyarea,
1458        .fb_imageblit   = cfb_imageblit,
1459        .fb_sync        = sm501fb_sync,
1460};
1461
1462static struct fb_ops sm501fb_ops_pnl = {
1463        .owner          = THIS_MODULE,
1464        .fb_check_var   = sm501fb_check_var_pnl,
1465        .fb_set_par     = sm501fb_set_par_pnl,
1466        .fb_pan_display = sm501fb_pan_pnl,
1467        .fb_blank       = sm501fb_blank_pnl,
1468        .fb_setcolreg   = sm501fb_setcolreg,
1469        .fb_cursor      = sm501fb_cursor,
1470        .fb_fillrect    = sm501fb_fillrect,
1471        .fb_copyarea    = sm501fb_copyarea,
1472        .fb_imageblit   = cfb_imageblit,
1473        .fb_sync        = sm501fb_sync,
1474};
1475
1476/* sm501_init_cursor
1477 *
1478 * initialise hw cursor parameters
1479*/
1480
1481static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1482{
1483        struct sm501fb_par *par;
1484        struct sm501fb_info *info;
1485        int ret;
1486
1487        if (fbi == NULL)
1488                return 0;
1489
1490        par = fbi->par;
1491        info = par->info;
1492
1493        par->cursor_regs = info->regs + reg_base;
1494
1495        ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1496                              fbi->fix.smem_len);
1497        if (ret < 0)
1498                return ret;
1499
1500        /* initialise the colour registers */
1501
1502        smc501_writel(par->cursor.sm_addr,
1503                        par->cursor_regs + SM501_OFF_HWC_ADDR);
1504
1505        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1506        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1507        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1508        sm501fb_sync_regs(info);
1509
1510        return 0;
1511}
1512
1513/* sm501fb_info_start
1514 *
1515 * fills the par structure claiming resources and remapping etc.
1516*/
1517
1518static int sm501fb_start(struct sm501fb_info *info,
1519                         struct platform_device *pdev)
1520{
1521        struct resource *res;
1522        struct device *dev = &pdev->dev;
1523        int k;
1524        int ret;
1525
1526        info->irq = ret = platform_get_irq(pdev, 0);
1527        if (ret < 0) {
1528                /* we currently do not use the IRQ */
1529                dev_warn(dev, "no irq for device\n");
1530        }
1531
1532        /* allocate, reserve and remap resources for display
1533         * controller registers */
1534        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1535        if (res == NULL) {
1536                dev_err(dev, "no resource definition for registers\n");
1537                ret = -ENOENT;
1538                goto err_release;
1539        }
1540
1541        info->regs_res = request_mem_region(res->start,
1542                                            resource_size(res),
1543                                            pdev->name);
1544
1545        if (info->regs_res == NULL) {
1546                dev_err(dev, "cannot claim registers\n");
1547                ret = -ENXIO;
1548                goto err_release;
1549        }
1550
1551        info->regs = ioremap(res->start, resource_size(res));
1552        if (info->regs == NULL) {
1553                dev_err(dev, "cannot remap registers\n");
1554                ret = -ENXIO;
1555                goto err_regs_res;
1556        }
1557
1558        /* allocate, reserve and remap resources for 2d
1559         * controller registers */
1560        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1561        if (res == NULL) {
1562                dev_err(dev, "no resource definition for 2d registers\n");
1563                ret = -ENOENT;
1564                goto err_regs_map;
1565        }
1566
1567        info->regs2d_res = request_mem_region(res->start,
1568                                              resource_size(res),
1569                                              pdev->name);
1570
1571        if (info->regs2d_res == NULL) {
1572                dev_err(dev, "cannot claim registers\n");
1573                ret = -ENXIO;
1574                goto err_regs_map;
1575        }
1576
1577        info->regs2d = ioremap(res->start, resource_size(res));
1578        if (info->regs2d == NULL) {
1579                dev_err(dev, "cannot remap registers\n");
1580                ret = -ENXIO;
1581                goto err_regs2d_res;
1582        }
1583
1584        /* allocate, reserve resources for framebuffer */
1585        res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1586        if (res == NULL) {
1587                dev_err(dev, "no memory resource defined\n");
1588                ret = -ENXIO;
1589                goto err_regs2d_map;
1590        }
1591
1592        info->fbmem_res = request_mem_region(res->start,
1593                                             resource_size(res),
1594                                             pdev->name);
1595        if (info->fbmem_res == NULL) {
1596                dev_err(dev, "cannot claim framebuffer\n");
1597                ret = -ENXIO;
1598                goto err_regs2d_map;
1599        }
1600
1601        info->fbmem = ioremap(res->start, resource_size(res));
1602        if (info->fbmem == NULL) {
1603                dev_err(dev, "cannot remap framebuffer\n");
1604                ret = -ENXIO;
1605                goto err_mem_res;
1606        }
1607
1608        info->fbmem_len = resource_size(res);
1609
1610        /* clear framebuffer memory - avoids garbage data on unused fb */
1611        memset_io(info->fbmem, 0, info->fbmem_len);
1612
1613        /* clear palette ram - undefined at power on */
1614        for (k = 0; k < (256 * 3); k++)
1615                smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1616
1617        /* enable display controller */
1618        sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1619
1620        /* enable 2d controller */
1621        sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1622
1623        /* setup cursors */
1624        sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1625        sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1626
1627        return 0; /* everything is setup */
1628
1629 err_mem_res:
1630        release_mem_region(info->fbmem_res->start,
1631                           resource_size(info->fbmem_res));
1632
1633 err_regs2d_map:
1634        iounmap(info->regs2d);
1635
1636 err_regs2d_res:
1637        release_mem_region(info->regs2d_res->start,
1638                           resource_size(info->regs2d_res));
1639
1640 err_regs_map:
1641        iounmap(info->regs);
1642
1643 err_regs_res:
1644        release_mem_region(info->regs_res->start,
1645                           resource_size(info->regs_res));
1646
1647 err_release:
1648        return ret;
1649}
1650
1651static void sm501fb_stop(struct sm501fb_info *info)
1652{
1653        /* disable display controller */
1654        sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1655
1656        iounmap(info->fbmem);
1657        release_mem_region(info->fbmem_res->start,
1658                           resource_size(info->fbmem_res));
1659
1660        iounmap(info->regs2d);
1661        release_mem_region(info->regs2d_res->start,
1662                           resource_size(info->regs2d_res));
1663
1664        iounmap(info->regs);
1665        release_mem_region(info->regs_res->start,
1666                           resource_size(info->regs_res));
1667}
1668
1669static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
1670                           const char *fbname)
1671{
1672        struct sm501_platdata_fbsub *pd;
1673        struct sm501fb_par *par = fb->par;
1674        struct sm501fb_info *info = par->info;
1675        unsigned long ctrl;
1676        unsigned int enable;
1677        int ret;
1678
1679        switch (head) {
1680        case HEAD_CRT:
1681                pd = info->pdata->fb_crt;
1682                ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1683                enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1684
1685                /* ensure we set the correct source register */
1686                if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1687                        ctrl |= SM501_DC_CRT_CONTROL_SEL;
1688                        smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1689                }
1690
1691                break;
1692
1693        case HEAD_PANEL:
1694                pd = info->pdata->fb_pnl;
1695                ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1696                enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1697                break;
1698
1699        default:
1700                pd = NULL;              /* stop compiler warnings */
1701                ctrl = 0;
1702                enable = 0;
1703                BUG();
1704        }
1705
1706        dev_info(info->dev, "fb %s %sabled at start\n",
1707                 fbname, enable ? "en" : "dis");
1708
1709        /* check to see if our routing allows this */
1710
1711        if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1712                ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1713                smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1714                enable = 0;
1715        }
1716
1717        strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1718
1719        memcpy(&par->ops,
1720               (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1721               sizeof(struct fb_ops));
1722
1723        /* update ops dependent on what we've been passed */
1724
1725        if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1726                par->ops.fb_cursor = NULL;
1727
1728        fb->fbops = &par->ops;
1729        fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1730                FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1731                FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1732
1733#if defined(CONFIG_OF)
1734#ifdef __BIG_ENDIAN
1735        if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
1736                fb->flags |= FBINFO_FOREIGN_ENDIAN;
1737#else
1738        if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
1739                fb->flags |= FBINFO_FOREIGN_ENDIAN;
1740#endif
1741#endif
1742        /* fixed data */
1743
1744        fb->fix.type            = FB_TYPE_PACKED_PIXELS;
1745        fb->fix.type_aux        = 0;
1746        fb->fix.xpanstep        = 1;
1747        fb->fix.ypanstep        = 1;
1748        fb->fix.ywrapstep       = 0;
1749        fb->fix.accel           = FB_ACCEL_NONE;
1750
1751        /* screenmode */
1752
1753        fb->var.nonstd          = 0;
1754        fb->var.activate        = FB_ACTIVATE_NOW;
1755        fb->var.accel_flags     = 0;
1756        fb->var.vmode           = FB_VMODE_NONINTERLACED;
1757        fb->var.bits_per_pixel  = 16;
1758
1759        if (info->edid_data) {
1760                        /* Now build modedb from EDID */
1761                        fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1762                        fb_videomode_to_modelist(fb->monspecs.modedb,
1763                                                 fb->monspecs.modedb_len,
1764                                                 &fb->modelist);
1765        }
1766
1767        if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1768                /* TODO read the mode from the current display */
1769        } else {
1770                if (pd->def_mode) {
1771                        dev_info(info->dev, "using supplied mode\n");
1772                        fb_videomode_to_var(&fb->var, pd->def_mode);
1773
1774                        fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1775                        fb->var.xres_virtual = fb->var.xres;
1776                        fb->var.yres_virtual = fb->var.yres;
1777                } else {
1778                        if (info->edid_data) {
1779                                ret = fb_find_mode(&fb->var, fb, fb_mode,
1780                                        fb->monspecs.modedb,
1781                                        fb->monspecs.modedb_len,
1782                                        &sm501_default_mode, default_bpp);
1783                                /* edid_data is no longer needed, free it */
1784                                kfree(info->edid_data);
1785                        } else {
1786                                ret = fb_find_mode(&fb->var, fb,
1787                                           NULL, NULL, 0, NULL, 8);
1788                        }
1789
1790                        switch (ret) {
1791                        case 1:
1792                                dev_info(info->dev, "using mode specified in "
1793                                                "@mode\n");
1794                                break;
1795                        case 2:
1796                                dev_info(info->dev, "using mode specified in "
1797                                        "@mode with ignored refresh rate\n");
1798                                break;
1799                        case 3:
1800                                dev_info(info->dev, "using mode default "
1801                                        "mode\n");
1802                                break;
1803                        case 4:
1804                                dev_info(info->dev, "using mode from list\n");
1805                                break;
1806                        default:
1807                                dev_info(info->dev, "ret = %d\n", ret);
1808                                dev_info(info->dev, "failed to find mode\n");
1809                                return -EINVAL;
1810                        }
1811                }
1812        }
1813
1814        /* initialise and set the palette */
1815        if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1816                dev_err(info->dev, "failed to allocate cmap memory\n");
1817                return -ENOMEM;
1818        }
1819        fb_set_cmap(&fb->cmap, fb);
1820
1821        ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1822        if (ret)
1823                dev_err(info->dev, "check_var() failed on initial setup?\n");
1824
1825        return 0;
1826}
1827
1828/* default platform data if none is supplied (ie, PCI device) */
1829
1830static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1831        .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1832                           SM501FB_FLAG_USE_HWCURSOR |
1833                           SM501FB_FLAG_USE_HWACCEL |
1834                           SM501FB_FLAG_DISABLE_AT_EXIT),
1835
1836};
1837
1838static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1839        .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1840                           SM501FB_FLAG_USE_HWCURSOR |
1841                           SM501FB_FLAG_USE_HWACCEL |
1842                           SM501FB_FLAG_DISABLE_AT_EXIT),
1843};
1844
1845static struct sm501_platdata_fb sm501fb_def_pdata = {
1846        .fb_route               = SM501_FB_OWN,
1847        .fb_crt                 = &sm501fb_pdata_crt,
1848        .fb_pnl                 = &sm501fb_pdata_pnl,
1849};
1850
1851static char driver_name_crt[] = "sm501fb-crt";
1852static char driver_name_pnl[] = "sm501fb-panel";
1853
1854static int sm501fb_probe_one(struct sm501fb_info *info,
1855                             enum sm501_controller head)
1856{
1857        unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1858        struct sm501_platdata_fbsub *pd;
1859        struct sm501fb_par *par;
1860        struct fb_info *fbi;
1861
1862        pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1863
1864        /* Do not initialise if we've not been given any platform data */
1865        if (pd == NULL) {
1866                dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1867                return 0;
1868        }
1869
1870        fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1871        if (fbi == NULL) {
1872                dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1873                return -ENOMEM;
1874        }
1875
1876        par = fbi->par;
1877        par->info = info;
1878        par->head = head;
1879        fbi->pseudo_palette = &par->pseudo_palette;
1880
1881        info->fb[head] = fbi;
1882
1883        return 0;
1884}
1885
1886/* Free up anything allocated by sm501fb_init_fb */
1887
1888static void sm501_free_init_fb(struct sm501fb_info *info,
1889                                enum sm501_controller head)
1890{
1891        struct fb_info *fbi = info->fb[head];
1892
1893        if (!fbi)
1894                return;
1895
1896        fb_dealloc_cmap(&fbi->cmap);
1897}
1898
1899static int sm501fb_start_one(struct sm501fb_info *info,
1900                             enum sm501_controller head, const char *drvname)
1901{
1902        struct fb_info *fbi = info->fb[head];
1903        int ret;
1904
1905        if (!fbi)
1906                return 0;
1907
1908        mutex_init(&info->fb[head]->mm_lock);
1909
1910        ret = sm501fb_init_fb(info->fb[head], head, drvname);
1911        if (ret) {
1912                dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1913                return ret;
1914        }
1915
1916        ret = register_framebuffer(info->fb[head]);
1917        if (ret) {
1918                dev_err(info->dev, "failed to register fb %s\n", drvname);
1919                sm501_free_init_fb(info, head);
1920                return ret;
1921        }
1922
1923        dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1924
1925        return 0;
1926}
1927
1928static int sm501fb_probe(struct platform_device *pdev)
1929{
1930        struct sm501fb_info *info;
1931        struct device *dev = &pdev->dev;
1932        int ret;
1933
1934        /* allocate our framebuffers */
1935        info = kzalloc(sizeof(*info), GFP_KERNEL);
1936        if (!info) {
1937                dev_err(dev, "failed to allocate state\n");
1938                return -ENOMEM;
1939        }
1940
1941        info->dev = dev = &pdev->dev;
1942        platform_set_drvdata(pdev, info);
1943
1944        if (dev->parent->platform_data) {
1945                struct sm501_platdata *pd = dev->parent->platform_data;
1946                info->pdata = pd->fb;
1947        }
1948
1949        if (info->pdata == NULL) {
1950                int found = 0;
1951#if defined(CONFIG_OF)
1952                struct device_node *np = pdev->dev.parent->of_node;
1953                const u8 *prop;
1954                const char *cp;
1955                int len;
1956
1957                info->pdata = &sm501fb_def_pdata;
1958                if (np) {
1959                        /* Get EDID */
1960                        cp = of_get_property(np, "mode", &len);
1961                        if (cp)
1962                                strcpy(fb_mode, cp);
1963                        prop = of_get_property(np, "edid", &len);
1964                        if (prop && len == EDID_LENGTH) {
1965                                info->edid_data = kmemdup(prop, EDID_LENGTH,
1966                                                          GFP_KERNEL);
1967                                if (info->edid_data)
1968                                        found = 1;
1969                        }
1970                }
1971#endif
1972                if (!found) {
1973                        dev_info(dev, "using default configuration data\n");
1974                        info->pdata = &sm501fb_def_pdata;
1975                }
1976        }
1977
1978        /* probe for the presence of each panel */
1979
1980        ret = sm501fb_probe_one(info, HEAD_CRT);
1981        if (ret < 0) {
1982                dev_err(dev, "failed to probe CRT\n");
1983                goto err_alloc;
1984        }
1985
1986        ret = sm501fb_probe_one(info, HEAD_PANEL);
1987        if (ret < 0) {
1988                dev_err(dev, "failed to probe PANEL\n");
1989                goto err_probed_crt;
1990        }
1991
1992        if (info->fb[HEAD_PANEL] == NULL &&
1993            info->fb[HEAD_CRT] == NULL) {
1994                dev_err(dev, "no framebuffers found\n");
1995                ret = -ENODEV;
1996                goto err_alloc;
1997        }
1998
1999        /* get the resources for both of the framebuffers */
2000
2001        ret = sm501fb_start(info, pdev);
2002        if (ret) {
2003                dev_err(dev, "cannot initialise SM501\n");
2004                goto err_probed_panel;
2005        }
2006
2007        ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2008        if (ret) {
2009                dev_err(dev, "failed to start CRT\n");
2010                goto err_started;
2011        }
2012
2013        ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2014        if (ret) {
2015                dev_err(dev, "failed to start Panel\n");
2016                goto err_started_crt;
2017        }
2018
2019        /* create device files */
2020
2021        ret = device_create_file(dev, &dev_attr_crt_src);
2022        if (ret)
2023                goto err_started_panel;
2024
2025        ret = device_create_file(dev, &dev_attr_fbregs_pnl);
2026        if (ret)
2027                goto err_attached_crtsrc_file;
2028
2029        ret = device_create_file(dev, &dev_attr_fbregs_crt);
2030        if (ret)
2031                goto err_attached_pnlregs_file;
2032
2033        /* we registered, return ok */
2034        return 0;
2035
2036err_attached_pnlregs_file:
2037        device_remove_file(dev, &dev_attr_fbregs_pnl);
2038
2039err_attached_crtsrc_file:
2040        device_remove_file(dev, &dev_attr_crt_src);
2041
2042err_started_panel:
2043        unregister_framebuffer(info->fb[HEAD_PANEL]);
2044        sm501_free_init_fb(info, HEAD_PANEL);
2045
2046err_started_crt:
2047        unregister_framebuffer(info->fb[HEAD_CRT]);
2048        sm501_free_init_fb(info, HEAD_CRT);
2049
2050err_started:
2051        sm501fb_stop(info);
2052
2053err_probed_panel:
2054        framebuffer_release(info->fb[HEAD_PANEL]);
2055
2056err_probed_crt:
2057        framebuffer_release(info->fb[HEAD_CRT]);
2058
2059err_alloc:
2060        kfree(info);
2061
2062        return ret;
2063}
2064
2065
2066/*
2067 *  Cleanup
2068 */
2069static int sm501fb_remove(struct platform_device *pdev)
2070{
2071        struct sm501fb_info *info = platform_get_drvdata(pdev);
2072        struct fb_info     *fbinfo_crt = info->fb[0];
2073        struct fb_info     *fbinfo_pnl = info->fb[1];
2074
2075        device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
2076        device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
2077        device_remove_file(&pdev->dev, &dev_attr_crt_src);
2078
2079        sm501_free_init_fb(info, HEAD_CRT);
2080        sm501_free_init_fb(info, HEAD_PANEL);
2081
2082        if (fbinfo_crt)
2083                unregister_framebuffer(fbinfo_crt);
2084        if (fbinfo_pnl)
2085                unregister_framebuffer(fbinfo_pnl);
2086
2087        sm501fb_stop(info);
2088        kfree(info);
2089
2090        framebuffer_release(fbinfo_pnl);
2091        framebuffer_release(fbinfo_crt);
2092
2093        return 0;
2094}
2095
2096#ifdef CONFIG_PM
2097
2098static int sm501fb_suspend_fb(struct sm501fb_info *info,
2099                              enum sm501_controller head)
2100{
2101        struct fb_info *fbi = info->fb[head];
2102        struct sm501fb_par *par;
2103
2104        if (!fbi)
2105                return 0;
2106
2107        par = fbi->par;
2108        if (par->screen.size == 0)
2109                return 0;
2110
2111        /* blank the relevant interface to ensure unit power minimised */
2112        (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2113
2114        /* tell console/fb driver we are suspending */
2115
2116        console_lock();
2117        fb_set_suspend(fbi, 1);
2118        console_unlock();
2119
2120        /* backup copies in case chip is powered down over suspend */
2121
2122        par->store_fb = vmalloc(par->screen.size);
2123        if (par->store_fb == NULL) {
2124                dev_err(info->dev, "no memory to store screen\n");
2125                return -ENOMEM;
2126        }
2127
2128        par->store_cursor = vmalloc(par->cursor.size);
2129        if (par->store_cursor == NULL) {
2130                dev_err(info->dev, "no memory to store cursor\n");
2131                goto err_nocursor;
2132        }
2133
2134        dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2135        dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2136
2137        memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2138        memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2139
2140        return 0;
2141
2142 err_nocursor:
2143        vfree(par->store_fb);
2144        par->store_fb = NULL;
2145
2146        return -ENOMEM;
2147}
2148
2149static void sm501fb_resume_fb(struct sm501fb_info *info,
2150                              enum sm501_controller head)
2151{
2152        struct fb_info *fbi = info->fb[head];
2153        struct sm501fb_par *par;
2154
2155        if (!fbi)
2156                return;
2157
2158        par = fbi->par;
2159        if (par->screen.size == 0)
2160                return;
2161
2162        /* re-activate the configuration */
2163
2164        (par->ops.fb_set_par)(fbi);
2165
2166        /* restore the data */
2167
2168        dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2169        dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2170
2171        if (par->store_fb)
2172                memcpy_toio(par->screen.k_addr, par->store_fb,
2173                            par->screen.size);
2174
2175        if (par->store_cursor)
2176                memcpy_toio(par->cursor.k_addr, par->store_cursor,
2177                            par->cursor.size);
2178
2179        console_lock();
2180        fb_set_suspend(fbi, 0);
2181        console_unlock();
2182
2183        vfree(par->store_fb);
2184        vfree(par->store_cursor);
2185}
2186
2187
2188/* suspend and resume support */
2189
2190static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2191{
2192        struct sm501fb_info *info = platform_get_drvdata(pdev);
2193
2194        /* store crt control to resume with */
2195        info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2196
2197        sm501fb_suspend_fb(info, HEAD_CRT);
2198        sm501fb_suspend_fb(info, HEAD_PANEL);
2199
2200        /* turn off the clocks, in case the device is not powered down */
2201        sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2202
2203        return 0;
2204}
2205
2206#define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
2207                             SM501_DC_CRT_CONTROL_SEL)
2208
2209
2210static int sm501fb_resume(struct platform_device *pdev)
2211{
2212        struct sm501fb_info *info = platform_get_drvdata(pdev);
2213        unsigned long crt_ctrl;
2214
2215        sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2216
2217        /* restore the items we want to be saved for crt control */
2218
2219        crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2220        crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2221        crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2222        smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2223
2224        sm501fb_resume_fb(info, HEAD_CRT);
2225        sm501fb_resume_fb(info, HEAD_PANEL);
2226
2227        return 0;
2228}
2229
2230#else
2231#define sm501fb_suspend NULL
2232#define sm501fb_resume  NULL
2233#endif
2234
2235static struct platform_driver sm501fb_driver = {
2236        .probe          = sm501fb_probe,
2237        .remove         = sm501fb_remove,
2238        .suspend        = sm501fb_suspend,
2239        .resume         = sm501fb_resume,
2240        .driver         = {
2241                .name   = "sm501-fb",
2242        },
2243};
2244
2245module_platform_driver(sm501fb_driver);
2246
2247module_param_named(mode, fb_mode, charp, 0);
2248MODULE_PARM_DESC(mode,
2249        "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2250module_param_named(bpp, default_bpp, ulong, 0);
2251MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2252MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2253MODULE_DESCRIPTION("SM501 Framebuffer driver");
2254MODULE_LICENSE("GPL v2");
2255