linux/drivers/video/fbdev/arkfb.c
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   1/*
   2 *  linux/drivers/video/arkfb.c -- Frame buffer device driver for ARK 2000PV
   3 *  with ICS 5342 dac (it is easy to add support for different dacs).
   4 *
   5 *  Copyright (c) 2007 Ondrej Zajicek <santiago@crfreenet.org>
   6 *
   7 *  This file is subject to the terms and conditions of the GNU General Public
   8 *  License.  See the file COPYING in the main directory of this archive for
   9 *  more details.
  10 *
  11 *  Code is based on s3fb
  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/svga.h>
  24#include <linux/init.h>
  25#include <linux/pci.h>
  26#include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
  27#include <video/vga.h>
  28
  29struct arkfb_info {
  30        int mclk_freq;
  31        int wc_cookie;
  32
  33        struct dac_info *dac;
  34        struct vgastate state;
  35        struct mutex open_lock;
  36        unsigned int ref_count;
  37        u32 pseudo_palette[16];
  38};
  39
  40
  41/* ------------------------------------------------------------------------- */
  42
  43
  44static const struct svga_fb_format arkfb_formats[] = {
  45        { 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  46                FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4,   FB_VISUAL_PSEUDOCOLOR, 8, 8},
  47        { 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  48                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 8, 16},
  49        { 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
  50                FB_TYPE_INTERLEAVED_PLANES, 1,          FB_VISUAL_PSEUDOCOLOR, 8, 16},
  51        { 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  52                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 8, 8},
  53        {16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
  54                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 4, 4},
  55        {16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
  56                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 4, 4},
  57        {24,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
  58                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 8, 8},
  59        {32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
  60                FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 2, 2},
  61        SVGA_FORMAT_END
  62};
  63
  64
  65/* CRT timing register sets */
  66
  67static const struct vga_regset ark_h_total_regs[]        = {{0x00, 0, 7}, {0x41, 7, 7}, VGA_REGSET_END};
  68static const struct vga_regset ark_h_display_regs[]      = {{0x01, 0, 7}, {0x41, 6, 6}, VGA_REGSET_END};
  69static const struct vga_regset ark_h_blank_start_regs[]  = {{0x02, 0, 7}, {0x41, 5, 5}, VGA_REGSET_END};
  70static const struct vga_regset ark_h_blank_end_regs[]    = {{0x03, 0, 4}, {0x05, 7, 7   }, VGA_REGSET_END};
  71static const struct vga_regset ark_h_sync_start_regs[]   = {{0x04, 0, 7}, {0x41, 4, 4}, VGA_REGSET_END};
  72static const struct vga_regset ark_h_sync_end_regs[]     = {{0x05, 0, 4}, VGA_REGSET_END};
  73
  74static const struct vga_regset ark_v_total_regs[]        = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x40, 7, 7}, VGA_REGSET_END};
  75static const struct vga_regset ark_v_display_regs[]      = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x40, 6, 6}, VGA_REGSET_END};
  76static const struct vga_regset ark_v_blank_start_regs[]  = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x40, 5, 5}, VGA_REGSET_END};
  77// const struct vga_regset ark_v_blank_end_regs[]    = {{0x16, 0, 6}, VGA_REGSET_END};
  78static const struct vga_regset ark_v_blank_end_regs[]    = {{0x16, 0, 7}, VGA_REGSET_END};
  79static const struct vga_regset ark_v_sync_start_regs[]   = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x40, 4, 4}, VGA_REGSET_END};
  80static const struct vga_regset ark_v_sync_end_regs[]     = {{0x11, 0, 3}, VGA_REGSET_END};
  81
  82static const struct vga_regset ark_line_compare_regs[]   = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, VGA_REGSET_END};
  83static const struct vga_regset ark_start_address_regs[]  = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x40, 0, 2}, VGA_REGSET_END};
  84static const struct vga_regset ark_offset_regs[]         = {{0x13, 0, 7}, {0x41, 3, 3}, VGA_REGSET_END};
  85
  86static const struct svga_timing_regs ark_timing_regs     = {
  87        ark_h_total_regs, ark_h_display_regs, ark_h_blank_start_regs,
  88        ark_h_blank_end_regs, ark_h_sync_start_regs, ark_h_sync_end_regs,
  89        ark_v_total_regs, ark_v_display_regs, ark_v_blank_start_regs,
  90        ark_v_blank_end_regs, ark_v_sync_start_regs, ark_v_sync_end_regs,
  91};
  92
  93
  94/* ------------------------------------------------------------------------- */
  95
  96
  97/* Module parameters */
  98
  99static char *mode_option = "640x480-8@60";
 100
 101MODULE_AUTHOR("(c) 2007 Ondrej Zajicek <santiago@crfreenet.org>");
 102MODULE_LICENSE("GPL");
 103MODULE_DESCRIPTION("fbdev driver for ARK 2000PV");
 104
 105module_param(mode_option, charp, 0444);
 106MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
 107module_param_named(mode, mode_option, charp, 0444);
 108MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (deprecated)");
 109
 110static int threshold = 4;
 111
 112module_param(threshold, int, 0644);
 113MODULE_PARM_DESC(threshold, "FIFO threshold");
 114
 115
 116/* ------------------------------------------------------------------------- */
 117
 118
 119static void arkfb_settile(struct fb_info *info, struct fb_tilemap *map)
 120{
 121        const u8 *font = map->data;
 122        u8 __iomem *fb = (u8 __iomem *)info->screen_base;
 123        int i, c;
 124
 125        if ((map->width != 8) || (map->height != 16) ||
 126            (map->depth != 1) || (map->length != 256)) {
 127                fb_err(info, "unsupported font parameters: width %d, height %d, depth %d, length %d\n",
 128                       map->width, map->height, map->depth, map->length);
 129                return;
 130        }
 131
 132        fb += 2;
 133        for (c = 0; c < map->length; c++) {
 134                for (i = 0; i < map->height; i++) {
 135                        fb_writeb(font[i], &fb[i * 4]);
 136                        fb_writeb(font[i], &fb[i * 4 + (128 * 8)]);
 137                }
 138                fb += 128;
 139
 140                if ((c % 8) == 7)
 141                        fb += 128*8;
 142
 143                font += map->height;
 144        }
 145}
 146
 147static void arkfb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
 148{
 149        struct arkfb_info *par = info->par;
 150
 151        svga_tilecursor(par->state.vgabase, info, cursor);
 152}
 153
 154static struct fb_tile_ops arkfb_tile_ops = {
 155        .fb_settile     = arkfb_settile,
 156        .fb_tilecopy    = svga_tilecopy,
 157        .fb_tilefill    = svga_tilefill,
 158        .fb_tileblit    = svga_tileblit,
 159        .fb_tilecursor  = arkfb_tilecursor,
 160        .fb_get_tilemax = svga_get_tilemax,
 161};
 162
 163
 164/* ------------------------------------------------------------------------- */
 165
 166
 167/* image data is MSB-first, fb structure is MSB-first too */
 168static inline u32 expand_color(u32 c)
 169{
 170        return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
 171}
 172
 173/* arkfb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
 174static void arkfb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
 175{
 176        u32 fg = expand_color(image->fg_color);
 177        u32 bg = expand_color(image->bg_color);
 178        const u8 *src1, *src;
 179        u8 __iomem *dst1;
 180        u32 __iomem *dst;
 181        u32 val;
 182        int x, y;
 183
 184        src1 = image->data;
 185        dst1 = info->screen_base + (image->dy * info->fix.line_length)
 186                 + ((image->dx / 8) * 4);
 187
 188        for (y = 0; y < image->height; y++) {
 189                src = src1;
 190                dst = (u32 __iomem *) dst1;
 191                for (x = 0; x < image->width; x += 8) {
 192                        val = *(src++) * 0x01010101;
 193                        val = (val & fg) | (~val & bg);
 194                        fb_writel(val, dst++);
 195                }
 196                src1 += image->width / 8;
 197                dst1 += info->fix.line_length;
 198        }
 199
 200}
 201
 202/* arkfb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
 203static void arkfb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 204{
 205        u32 fg = expand_color(rect->color);
 206        u8 __iomem *dst1;
 207        u32 __iomem *dst;
 208        int x, y;
 209
 210        dst1 = info->screen_base + (rect->dy * info->fix.line_length)
 211                 + ((rect->dx / 8) * 4);
 212
 213        for (y = 0; y < rect->height; y++) {
 214                dst = (u32 __iomem *) dst1;
 215                for (x = 0; x < rect->width; x += 8) {
 216                        fb_writel(fg, dst++);
 217                }
 218                dst1 += info->fix.line_length;
 219        }
 220
 221}
 222
 223
 224/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
 225static inline u32 expand_pixel(u32 c)
 226{
 227        return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
 228                ((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
 229}
 230
 231/* arkfb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
 232static void arkfb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
 233{
 234        u32 fg = image->fg_color * 0x11111111;
 235        u32 bg = image->bg_color * 0x11111111;
 236        const u8 *src1, *src;
 237        u8 __iomem *dst1;
 238        u32 __iomem *dst;
 239        u32 val;
 240        int x, y;
 241
 242        src1 = image->data;
 243        dst1 = info->screen_base + (image->dy * info->fix.line_length)
 244                 + ((image->dx / 8) * 4);
 245
 246        for (y = 0; y < image->height; y++) {
 247                src = src1;
 248                dst = (u32 __iomem *) dst1;
 249                for (x = 0; x < image->width; x += 8) {
 250                        val = expand_pixel(*(src++));
 251                        val = (val & fg) | (~val & bg);
 252                        fb_writel(val, dst++);
 253                }
 254                src1 += image->width / 8;
 255                dst1 += info->fix.line_length;
 256        }
 257
 258}
 259
 260static void arkfb_imageblit(struct fb_info *info, const struct fb_image *image)
 261{
 262        if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
 263            && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
 264                if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
 265                        arkfb_iplan_imageblit(info, image);
 266                else
 267                        arkfb_cfb4_imageblit(info, image);
 268        } else
 269                cfb_imageblit(info, image);
 270}
 271
 272static void arkfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 273{
 274        if ((info->var.bits_per_pixel == 4)
 275            && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
 276            && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
 277                arkfb_iplan_fillrect(info, rect);
 278         else
 279                cfb_fillrect(info, rect);
 280}
 281
 282
 283/* ------------------------------------------------------------------------- */
 284
 285
 286enum
 287{
 288        DAC_PSEUDO8_8,
 289        DAC_RGB1555_8,
 290        DAC_RGB0565_8,
 291        DAC_RGB0888_8,
 292        DAC_RGB8888_8,
 293        DAC_PSEUDO8_16,
 294        DAC_RGB1555_16,
 295        DAC_RGB0565_16,
 296        DAC_RGB0888_16,
 297        DAC_RGB8888_16,
 298        DAC_MAX
 299};
 300
 301struct dac_ops {
 302        int (*dac_get_mode)(struct dac_info *info);
 303        int (*dac_set_mode)(struct dac_info *info, int mode);
 304        int (*dac_get_freq)(struct dac_info *info, int channel);
 305        int (*dac_set_freq)(struct dac_info *info, int channel, u32 freq);
 306        void (*dac_release)(struct dac_info *info);
 307};
 308
 309typedef void (*dac_read_regs_t)(void *data, u8 *code, int count);
 310typedef void (*dac_write_regs_t)(void *data, u8 *code, int count);
 311
 312struct dac_info
 313{
 314        struct dac_ops *dacops;
 315        dac_read_regs_t dac_read_regs;
 316        dac_write_regs_t dac_write_regs;
 317        void *data;
 318};
 319
 320
 321static inline u8 dac_read_reg(struct dac_info *info, u8 reg)
 322{
 323        u8 code[2] = {reg, 0};
 324        info->dac_read_regs(info->data, code, 1);
 325        return code[1];
 326}
 327
 328static inline void dac_read_regs(struct dac_info *info, u8 *code, int count)
 329{
 330        info->dac_read_regs(info->data, code, count);
 331}
 332
 333static inline void dac_write_reg(struct dac_info *info, u8 reg, u8 val)
 334{
 335        u8 code[2] = {reg, val};
 336        info->dac_write_regs(info->data, code, 1);
 337}
 338
 339static inline void dac_write_regs(struct dac_info *info, u8 *code, int count)
 340{
 341        info->dac_write_regs(info->data, code, count);
 342}
 343
 344static inline int dac_set_mode(struct dac_info *info, int mode)
 345{
 346        return info->dacops->dac_set_mode(info, mode);
 347}
 348
 349static inline int dac_set_freq(struct dac_info *info, int channel, u32 freq)
 350{
 351        return info->dacops->dac_set_freq(info, channel, freq);
 352}
 353
 354static inline void dac_release(struct dac_info *info)
 355{
 356        info->dacops->dac_release(info);
 357}
 358
 359
 360/* ------------------------------------------------------------------------- */
 361
 362
 363/* ICS5342 DAC */
 364
 365struct ics5342_info
 366{
 367        struct dac_info dac;
 368        u8 mode;
 369};
 370
 371#define DAC_PAR(info) ((struct ics5342_info *) info)
 372
 373/* LSB is set to distinguish unused slots */
 374static const u8 ics5342_mode_table[DAC_MAX] = {
 375        [DAC_PSEUDO8_8]  = 0x01, [DAC_RGB1555_8]  = 0x21, [DAC_RGB0565_8]  = 0x61,
 376        [DAC_RGB0888_8]  = 0x41, [DAC_PSEUDO8_16] = 0x11, [DAC_RGB1555_16] = 0x31,
 377        [DAC_RGB0565_16] = 0x51, [DAC_RGB0888_16] = 0x91, [DAC_RGB8888_16] = 0x71
 378};
 379
 380static int ics5342_set_mode(struct dac_info *info, int mode)
 381{
 382        u8 code;
 383
 384        if (mode >= DAC_MAX)
 385                return -EINVAL;
 386
 387        code = ics5342_mode_table[mode];
 388
 389        if (! code)
 390                return -EINVAL;
 391
 392        dac_write_reg(info, 6, code & 0xF0);
 393        DAC_PAR(info)->mode = mode;
 394
 395        return 0;
 396}
 397
 398static const struct svga_pll ics5342_pll = {3, 129, 3, 33, 0, 3,
 399        60000, 250000, 14318};
 400
 401/* pd4 - allow only posdivider 4 (r=2) */
 402static const struct svga_pll ics5342_pll_pd4 = {3, 129, 3, 33, 2, 2,
 403        60000, 335000, 14318};
 404
 405/* 270 MHz should be upper bound for VCO clock according to specs,
 406   but that is too restrictive in pd4 case */
 407
 408static int ics5342_set_freq(struct dac_info *info, int channel, u32 freq)
 409{
 410        u16 m, n, r;
 411
 412        /* only postdivider 4 (r=2) is valid in mode DAC_PSEUDO8_16 */
 413        int rv = svga_compute_pll((DAC_PAR(info)->mode == DAC_PSEUDO8_16)
 414                                  ? &ics5342_pll_pd4 : &ics5342_pll,
 415                                  freq, &m, &n, &r, 0);
 416
 417        if (rv < 0) {
 418                return -EINVAL;
 419        } else {
 420                u8 code[6] = {4, 3, 5, m-2, 5, (n-2) | (r << 5)};
 421                dac_write_regs(info, code, 3);
 422                return 0;
 423        }
 424}
 425
 426static void ics5342_release(struct dac_info *info)
 427{
 428        ics5342_set_mode(info, DAC_PSEUDO8_8);
 429        kfree(info);
 430}
 431
 432static struct dac_ops ics5342_ops = {
 433        .dac_set_mode   = ics5342_set_mode,
 434        .dac_set_freq   = ics5342_set_freq,
 435        .dac_release    = ics5342_release
 436};
 437
 438
 439static struct dac_info * ics5342_init(dac_read_regs_t drr, dac_write_regs_t dwr, void *data)
 440{
 441        struct dac_info *info = kzalloc(sizeof(struct ics5342_info), GFP_KERNEL);
 442
 443        if (! info)
 444                return NULL;
 445
 446        info->dacops = &ics5342_ops;
 447        info->dac_read_regs = drr;
 448        info->dac_write_regs = dwr;
 449        info->data = data;
 450        DAC_PAR(info)->mode = DAC_PSEUDO8_8; /* estimation */
 451        return info;
 452}
 453
 454
 455/* ------------------------------------------------------------------------- */
 456
 457
 458static unsigned short dac_regs[4] = {0x3c8, 0x3c9, 0x3c6, 0x3c7};
 459
 460static void ark_dac_read_regs(void *data, u8 *code, int count)
 461{
 462        struct fb_info *info = data;
 463        struct arkfb_info *par;
 464        u8 regval;
 465
 466        par = info->par;
 467        regval = vga_rseq(par->state.vgabase, 0x1C);
 468        while (count != 0)
 469        {
 470                vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
 471                code[1] = vga_r(par->state.vgabase, dac_regs[code[0] & 3]);
 472                count--;
 473                code += 2;
 474        }
 475
 476        vga_wseq(par->state.vgabase, 0x1C, regval);
 477}
 478
 479static void ark_dac_write_regs(void *data, u8 *code, int count)
 480{
 481        struct fb_info *info = data;
 482        struct arkfb_info *par;
 483        u8 regval;
 484
 485        par = info->par;
 486        regval = vga_rseq(par->state.vgabase, 0x1C);
 487        while (count != 0)
 488        {
 489                vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
 490                vga_w(par->state.vgabase, dac_regs[code[0] & 3], code[1]);
 491                count--;
 492                code += 2;
 493        }
 494
 495        vga_wseq(par->state.vgabase, 0x1C, regval);
 496}
 497
 498
 499static void ark_set_pixclock(struct fb_info *info, u32 pixclock)
 500{
 501        struct arkfb_info *par = info->par;
 502        u8 regval;
 503
 504        int rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock);
 505        if (rv < 0) {
 506                fb_err(info, "cannot set requested pixclock, keeping old value\n");
 507                return;
 508        }
 509
 510        /* Set VGA misc register  */
 511        regval = vga_r(par->state.vgabase, VGA_MIS_R);
 512        vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
 513}
 514
 515
 516/* Open framebuffer */
 517
 518static int arkfb_open(struct fb_info *info, int user)
 519{
 520        struct arkfb_info *par = info->par;
 521
 522        mutex_lock(&(par->open_lock));
 523        if (par->ref_count == 0) {
 524                void __iomem *vgabase = par->state.vgabase;
 525
 526                memset(&(par->state), 0, sizeof(struct vgastate));
 527                par->state.vgabase = vgabase;
 528                par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
 529                par->state.num_crtc = 0x60;
 530                par->state.num_seq = 0x30;
 531                save_vga(&(par->state));
 532        }
 533
 534        par->ref_count++;
 535        mutex_unlock(&(par->open_lock));
 536
 537        return 0;
 538}
 539
 540/* Close framebuffer */
 541
 542static int arkfb_release(struct fb_info *info, int user)
 543{
 544        struct arkfb_info *par = info->par;
 545
 546        mutex_lock(&(par->open_lock));
 547        if (par->ref_count == 0) {
 548                mutex_unlock(&(par->open_lock));
 549                return -EINVAL;
 550        }
 551
 552        if (par->ref_count == 1) {
 553                restore_vga(&(par->state));
 554                dac_set_mode(par->dac, DAC_PSEUDO8_8);
 555        }
 556
 557        par->ref_count--;
 558        mutex_unlock(&(par->open_lock));
 559
 560        return 0;
 561}
 562
 563/* Validate passed in var */
 564
 565static int arkfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 566{
 567        int rv, mem, step;
 568
 569        /* Find appropriate format */
 570        rv = svga_match_format (arkfb_formats, var, NULL);
 571        if (rv < 0)
 572        {
 573                fb_err(info, "unsupported mode requested\n");
 574                return rv;
 575        }
 576
 577        /* Do not allow to have real resoulution larger than virtual */
 578        if (var->xres > var->xres_virtual)
 579                var->xres_virtual = var->xres;
 580
 581        if (var->yres > var->yres_virtual)
 582                var->yres_virtual = var->yres;
 583
 584        /* Round up xres_virtual to have proper alignment of lines */
 585        step = arkfb_formats[rv].xresstep - 1;
 586        var->xres_virtual = (var->xres_virtual+step) & ~step;
 587
 588
 589        /* Check whether have enough memory */
 590        mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
 591        if (mem > info->screen_size)
 592        {
 593                fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n",
 594                       mem >> 10, (unsigned int) (info->screen_size >> 10));
 595                return -EINVAL;
 596        }
 597
 598        rv = svga_check_timings (&ark_timing_regs, var, info->node);
 599        if (rv < 0)
 600        {
 601                fb_err(info, "invalid timings requested\n");
 602                return rv;
 603        }
 604
 605        /* Interlaced mode is broken */
 606        if (var->vmode & FB_VMODE_INTERLACED)
 607                return -EINVAL;
 608
 609        return 0;
 610}
 611
 612/* Set video mode from par */
 613
 614static int arkfb_set_par(struct fb_info *info)
 615{
 616        struct arkfb_info *par = info->par;
 617        u32 value, mode, hmul, hdiv, offset_value, screen_size;
 618        u32 bpp = info->var.bits_per_pixel;
 619        u8 regval;
 620
 621        if (bpp != 0) {
 622                info->fix.ypanstep = 1;
 623                info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
 624
 625                info->flags &= ~FBINFO_MISC_TILEBLITTING;
 626                info->tileops = NULL;
 627
 628                /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
 629                info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
 630                info->pixmap.blit_y = ~(u32)0;
 631
 632                offset_value = (info->var.xres_virtual * bpp) / 64;
 633                screen_size = info->var.yres_virtual * info->fix.line_length;
 634        } else {
 635                info->fix.ypanstep = 16;
 636                info->fix.line_length = 0;
 637
 638                info->flags |= FBINFO_MISC_TILEBLITTING;
 639                info->tileops = &arkfb_tile_ops;
 640
 641                /* supports 8x16 tiles only */
 642                info->pixmap.blit_x = 1 << (8 - 1);
 643                info->pixmap.blit_y = 1 << (16 - 1);
 644
 645                offset_value = info->var.xres_virtual / 16;
 646                screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
 647        }
 648
 649        info->var.xoffset = 0;
 650        info->var.yoffset = 0;
 651        info->var.activate = FB_ACTIVATE_NOW;
 652
 653        /* Unlock registers */
 654        svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
 655
 656        /* Blank screen and turn off sync */
 657        svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
 658        svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
 659
 660        /* Set default values */
 661        svga_set_default_gfx_regs(par->state.vgabase);
 662        svga_set_default_atc_regs(par->state.vgabase);
 663        svga_set_default_seq_regs(par->state.vgabase);
 664        svga_set_default_crt_regs(par->state.vgabase);
 665        svga_wcrt_multi(par->state.vgabase, ark_line_compare_regs, 0xFFFFFFFF);
 666        svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, 0);
 667
 668        /* ARK specific initialization */
 669        svga_wseq_mask(par->state.vgabase, 0x10, 0x1F, 0x1F); /* enable linear framebuffer and full memory access */
 670        svga_wseq_mask(par->state.vgabase, 0x12, 0x03, 0x03); /* 4 MB linear framebuffer size */
 671
 672        vga_wseq(par->state.vgabase, 0x13, info->fix.smem_start >> 16);
 673        vga_wseq(par->state.vgabase, 0x14, info->fix.smem_start >> 24);
 674        vga_wseq(par->state.vgabase, 0x15, 0);
 675        vga_wseq(par->state.vgabase, 0x16, 0);
 676
 677        /* Set the FIFO threshold register */
 678        /* It is fascinating way to store 5-bit value in 8-bit register */
 679        regval = 0x10 | ((threshold & 0x0E) >> 1) | (threshold & 0x01) << 7 | (threshold & 0x10) << 1;
 680        vga_wseq(par->state.vgabase, 0x18, regval);
 681
 682        /* Set the offset register */
 683        fb_dbg(info, "offset register       : %d\n", offset_value);
 684        svga_wcrt_multi(par->state.vgabase, ark_offset_regs, offset_value);
 685
 686        /* fix for hi-res textmode */
 687        svga_wcrt_mask(par->state.vgabase, 0x40, 0x08, 0x08);
 688
 689        if (info->var.vmode & FB_VMODE_DOUBLE)
 690                svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
 691        else
 692                svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
 693
 694        if (info->var.vmode & FB_VMODE_INTERLACED)
 695                svga_wcrt_mask(par->state.vgabase, 0x44, 0x04, 0x04);
 696        else
 697                svga_wcrt_mask(par->state.vgabase, 0x44, 0x00, 0x04);
 698
 699        hmul = 1;
 700        hdiv = 1;
 701        mode = svga_match_format(arkfb_formats, &(info->var), &(info->fix));
 702
 703        /* Set mode-specific register values */
 704        switch (mode) {
 705        case 0:
 706                fb_dbg(info, "text mode\n");
 707                svga_set_textmode_vga_regs(par->state.vgabase);
 708
 709                vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
 710                svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
 711                dac_set_mode(par->dac, DAC_PSEUDO8_8);
 712
 713                break;
 714        case 1:
 715                fb_dbg(info, "4 bit pseudocolor\n");
 716                vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
 717
 718                vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
 719                svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
 720                dac_set_mode(par->dac, DAC_PSEUDO8_8);
 721                break;
 722        case 2:
 723                fb_dbg(info, "4 bit pseudocolor, planar\n");
 724
 725                vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
 726                svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
 727                dac_set_mode(par->dac, DAC_PSEUDO8_8);
 728                break;
 729        case 3:
 730                fb_dbg(info, "8 bit pseudocolor\n");
 731
 732                vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode */
 733
 734                if (info->var.pixclock > 20000) {
 735                        fb_dbg(info, "not using multiplex\n");
 736                        svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
 737                        dac_set_mode(par->dac, DAC_PSEUDO8_8);
 738                } else {
 739                        fb_dbg(info, "using multiplex\n");
 740                        svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
 741                        dac_set_mode(par->dac, DAC_PSEUDO8_16);
 742                        hdiv = 2;
 743                }
 744                break;
 745        case 4:
 746                fb_dbg(info, "5/5/5 truecolor\n");
 747
 748                vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */
 749                svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
 750                dac_set_mode(par->dac, DAC_RGB1555_16);
 751                break;
 752        case 5:
 753                fb_dbg(info, "5/6/5 truecolor\n");
 754
 755                vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */
 756                svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
 757                dac_set_mode(par->dac, DAC_RGB0565_16);
 758                break;
 759        case 6:
 760                fb_dbg(info, "8/8/8 truecolor\n");
 761
 762                vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode ??? */
 763                svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
 764                dac_set_mode(par->dac, DAC_RGB0888_16);
 765                hmul = 3;
 766                hdiv = 2;
 767                break;
 768        case 7:
 769                fb_dbg(info, "8/8/8/8 truecolor\n");
 770
 771                vga_wseq(par->state.vgabase, 0x11, 0x1E); /* 32bpp accel mode */
 772                svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
 773                dac_set_mode(par->dac, DAC_RGB8888_16);
 774                hmul = 2;
 775                break;
 776        default:
 777                fb_err(info, "unsupported mode - bug\n");
 778                return -EINVAL;
 779        }
 780
 781        ark_set_pixclock(info, (hdiv * info->var.pixclock) / hmul);
 782        svga_set_timings(par->state.vgabase, &ark_timing_regs, &(info->var), hmul, hdiv,
 783                         (info->var.vmode & FB_VMODE_DOUBLE)     ? 2 : 1,
 784                         (info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1,
 785                          hmul, info->node);
 786
 787        /* Set interlaced mode start/end register */
 788        value = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len;
 789        value = ((value * hmul / hdiv) / 8) - 5;
 790        vga_wcrt(par->state.vgabase, 0x42, (value + 1) / 2);
 791
 792        memset_io(info->screen_base, 0x00, screen_size);
 793        /* Device and screen back on */
 794        svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
 795        svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
 796
 797        return 0;
 798}
 799
 800/* Set a colour register */
 801
 802static int arkfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 803                                u_int transp, struct fb_info *fb)
 804{
 805        switch (fb->var.bits_per_pixel) {
 806        case 0:
 807        case 4:
 808                if (regno >= 16)
 809                        return -EINVAL;
 810
 811                if ((fb->var.bits_per_pixel == 4) &&
 812                    (fb->var.nonstd == 0)) {
 813                        outb(0xF0, VGA_PEL_MSK);
 814                        outb(regno*16, VGA_PEL_IW);
 815                } else {
 816                        outb(0x0F, VGA_PEL_MSK);
 817                        outb(regno, VGA_PEL_IW);
 818                }
 819                outb(red >> 10, VGA_PEL_D);
 820                outb(green >> 10, VGA_PEL_D);
 821                outb(blue >> 10, VGA_PEL_D);
 822                break;
 823        case 8:
 824                if (regno >= 256)
 825                        return -EINVAL;
 826
 827                outb(0xFF, VGA_PEL_MSK);
 828                outb(regno, VGA_PEL_IW);
 829                outb(red >> 10, VGA_PEL_D);
 830                outb(green >> 10, VGA_PEL_D);
 831                outb(blue >> 10, VGA_PEL_D);
 832                break;
 833        case 16:
 834                if (regno >= 16)
 835                        return 0;
 836
 837                if (fb->var.green.length == 5)
 838                        ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
 839                                ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
 840                else if (fb->var.green.length == 6)
 841                        ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
 842                                ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
 843                else
 844                        return -EINVAL;
 845                break;
 846        case 24:
 847        case 32:
 848                if (regno >= 16)
 849                        return 0;
 850
 851                ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
 852                        (green & 0xFF00) | ((blue & 0xFF00) >> 8);
 853                break;
 854        default:
 855                return -EINVAL;
 856        }
 857
 858        return 0;
 859}
 860
 861/* Set the display blanking state */
 862
 863static int arkfb_blank(int blank_mode, struct fb_info *info)
 864{
 865        struct arkfb_info *par = info->par;
 866
 867        switch (blank_mode) {
 868        case FB_BLANK_UNBLANK:
 869                fb_dbg(info, "unblank\n");
 870                svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
 871                svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
 872                break;
 873        case FB_BLANK_NORMAL:
 874                fb_dbg(info, "blank\n");
 875                svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
 876                svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
 877                break;
 878        case FB_BLANK_POWERDOWN:
 879        case FB_BLANK_HSYNC_SUSPEND:
 880        case FB_BLANK_VSYNC_SUSPEND:
 881                fb_dbg(info, "sync down\n");
 882                svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
 883                svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
 884                break;
 885        }
 886        return 0;
 887}
 888
 889
 890/* Pan the display */
 891
 892static int arkfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 893{
 894        struct arkfb_info *par = info->par;
 895        unsigned int offset;
 896
 897        /* Calculate the offset */
 898        if (info->var.bits_per_pixel == 0) {
 899                offset = (var->yoffset / 16) * (info->var.xres_virtual / 2)
 900                       + (var->xoffset / 2);
 901                offset = offset >> 2;
 902        } else {
 903                offset = (var->yoffset * info->fix.line_length) +
 904                         (var->xoffset * info->var.bits_per_pixel / 8);
 905                offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 3);
 906        }
 907
 908        /* Set the offset */
 909        svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, offset);
 910
 911        return 0;
 912}
 913
 914
 915/* ------------------------------------------------------------------------- */
 916
 917
 918/* Frame buffer operations */
 919
 920static struct fb_ops arkfb_ops = {
 921        .owner          = THIS_MODULE,
 922        .fb_open        = arkfb_open,
 923        .fb_release     = arkfb_release,
 924        .fb_check_var   = arkfb_check_var,
 925        .fb_set_par     = arkfb_set_par,
 926        .fb_setcolreg   = arkfb_setcolreg,
 927        .fb_blank       = arkfb_blank,
 928        .fb_pan_display = arkfb_pan_display,
 929        .fb_fillrect    = arkfb_fillrect,
 930        .fb_copyarea    = cfb_copyarea,
 931        .fb_imageblit   = arkfb_imageblit,
 932        .fb_get_caps    = svga_get_caps,
 933};
 934
 935
 936/* ------------------------------------------------------------------------- */
 937
 938
 939/* PCI probe */
 940static int ark_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 941{
 942        struct pci_bus_region bus_reg;
 943        struct resource vga_res;
 944        struct fb_info *info;
 945        struct arkfb_info *par;
 946        int rc;
 947        u8 regval;
 948
 949        /* Ignore secondary VGA device because there is no VGA arbitration */
 950        if (! svga_primary_device(dev)) {
 951                dev_info(&(dev->dev), "ignoring secondary device\n");
 952                return -ENODEV;
 953        }
 954
 955        /* Allocate and fill driver data structure */
 956        info = framebuffer_alloc(sizeof(struct arkfb_info), &(dev->dev));
 957        if (!info)
 958                return -ENOMEM;
 959
 960        par = info->par;
 961        mutex_init(&par->open_lock);
 962
 963        info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
 964        info->fbops = &arkfb_ops;
 965
 966        /* Prepare PCI device */
 967        rc = pci_enable_device(dev);
 968        if (rc < 0) {
 969                dev_err(info->device, "cannot enable PCI device\n");
 970                goto err_enable_device;
 971        }
 972
 973        rc = pci_request_regions(dev, "arkfb");
 974        if (rc < 0) {
 975                dev_err(info->device, "cannot reserve framebuffer region\n");
 976                goto err_request_regions;
 977        }
 978
 979        par->dac = ics5342_init(ark_dac_read_regs, ark_dac_write_regs, info);
 980        if (! par->dac) {
 981                rc = -ENOMEM;
 982                dev_err(info->device, "RAMDAC initialization failed\n");
 983                goto err_dac;
 984        }
 985
 986        info->fix.smem_start = pci_resource_start(dev, 0);
 987        info->fix.smem_len = pci_resource_len(dev, 0);
 988
 989        /* Map physical IO memory address into kernel space */
 990        info->screen_base = pci_iomap_wc(dev, 0, 0);
 991        if (! info->screen_base) {
 992                rc = -ENOMEM;
 993                dev_err(info->device, "iomap for framebuffer failed\n");
 994                goto err_iomap;
 995        }
 996
 997        bus_reg.start = 0;
 998        bus_reg.end = 64 * 1024;
 999
1000        vga_res.flags = IORESOURCE_IO;
1001
1002        pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
1003
1004        par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start;
1005
1006        /* FIXME get memsize */
1007        regval = vga_rseq(par->state.vgabase, 0x10);
1008        info->screen_size = (1 << (regval >> 6)) << 20;
1009        info->fix.smem_len = info->screen_size;
1010
1011        strcpy(info->fix.id, "ARK 2000PV");
1012        info->fix.mmio_start = 0;
1013        info->fix.mmio_len = 0;
1014        info->fix.type = FB_TYPE_PACKED_PIXELS;
1015        info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
1016        info->fix.ypanstep = 0;
1017        info->fix.accel = FB_ACCEL_NONE;
1018        info->pseudo_palette = (void*) (par->pseudo_palette);
1019
1020        /* Prepare startup mode */
1021        rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
1022        if (! ((rc == 1) || (rc == 2))) {
1023                rc = -EINVAL;
1024                dev_err(info->device, "mode %s not found\n", mode_option);
1025                goto err_find_mode;
1026        }
1027
1028        rc = fb_alloc_cmap(&info->cmap, 256, 0);
1029        if (rc < 0) {
1030                dev_err(info->device, "cannot allocate colormap\n");
1031                goto err_alloc_cmap;
1032        }
1033
1034        rc = register_framebuffer(info);
1035        if (rc < 0) {
1036                dev_err(info->device, "cannot register framebuffer\n");
1037                goto err_reg_fb;
1038        }
1039
1040        fb_info(info, "%s on %s, %d MB RAM\n",
1041                info->fix.id, pci_name(dev), info->fix.smem_len >> 20);
1042
1043        /* Record a reference to the driver data */
1044        pci_set_drvdata(dev, info);
1045        par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
1046                                          info->fix.smem_len);
1047        return 0;
1048
1049        /* Error handling */
1050err_reg_fb:
1051        fb_dealloc_cmap(&info->cmap);
1052err_alloc_cmap:
1053err_find_mode:
1054        pci_iounmap(dev, info->screen_base);
1055err_iomap:
1056        dac_release(par->dac);
1057err_dac:
1058        pci_release_regions(dev);
1059err_request_regions:
1060/*      pci_disable_device(dev); */
1061err_enable_device:
1062        framebuffer_release(info);
1063        return rc;
1064}
1065
1066/* PCI remove */
1067
1068static void ark_pci_remove(struct pci_dev *dev)
1069{
1070        struct fb_info *info = pci_get_drvdata(dev);
1071
1072        if (info) {
1073                struct arkfb_info *par = info->par;
1074                arch_phys_wc_del(par->wc_cookie);
1075                dac_release(par->dac);
1076                unregister_framebuffer(info);
1077                fb_dealloc_cmap(&info->cmap);
1078
1079                pci_iounmap(dev, info->screen_base);
1080                pci_release_regions(dev);
1081/*              pci_disable_device(dev); */
1082
1083                framebuffer_release(info);
1084        }
1085}
1086
1087
1088#ifdef CONFIG_PM
1089/* PCI suspend */
1090
1091static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
1092{
1093        struct fb_info *info = pci_get_drvdata(dev);
1094        struct arkfb_info *par = info->par;
1095
1096        dev_info(info->device, "suspend\n");
1097
1098        console_lock();
1099        mutex_lock(&(par->open_lock));
1100
1101        if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
1102                mutex_unlock(&(par->open_lock));
1103                console_unlock();
1104                return 0;
1105        }
1106
1107        fb_set_suspend(info, 1);
1108
1109        pci_save_state(dev);
1110        pci_disable_device(dev);
1111        pci_set_power_state(dev, pci_choose_state(dev, state));
1112
1113        mutex_unlock(&(par->open_lock));
1114        console_unlock();
1115
1116        return 0;
1117}
1118
1119
1120/* PCI resume */
1121
1122static int ark_pci_resume (struct pci_dev* dev)
1123{
1124        struct fb_info *info = pci_get_drvdata(dev);
1125        struct arkfb_info *par = info->par;
1126
1127        dev_info(info->device, "resume\n");
1128
1129        console_lock();
1130        mutex_lock(&(par->open_lock));
1131
1132        if (par->ref_count == 0)
1133                goto fail;
1134
1135        pci_set_power_state(dev, PCI_D0);
1136        pci_restore_state(dev);
1137
1138        if (pci_enable_device(dev))
1139                goto fail;
1140
1141        pci_set_master(dev);
1142
1143        arkfb_set_par(info);
1144        fb_set_suspend(info, 0);
1145
1146fail:
1147        mutex_unlock(&(par->open_lock));
1148        console_unlock();
1149        return 0;
1150}
1151#else
1152#define ark_pci_suspend NULL
1153#define ark_pci_resume NULL
1154#endif /* CONFIG_PM */
1155
1156/* List of boards that we are trying to support */
1157
1158static const struct pci_device_id ark_devices[] = {
1159        {PCI_DEVICE(0xEDD8, 0xA099)},
1160        {0, 0, 0, 0, 0, 0, 0}
1161};
1162
1163
1164MODULE_DEVICE_TABLE(pci, ark_devices);
1165
1166static struct pci_driver arkfb_pci_driver = {
1167        .name           = "arkfb",
1168        .id_table       = ark_devices,
1169        .probe          = ark_pci_probe,
1170        .remove         = ark_pci_remove,
1171        .suspend        = ark_pci_suspend,
1172        .resume         = ark_pci_resume,
1173};
1174
1175/* Cleanup */
1176
1177static void __exit arkfb_cleanup(void)
1178{
1179        pr_debug("arkfb: cleaning up\n");
1180        pci_unregister_driver(&arkfb_pci_driver);
1181}
1182
1183/* Driver Initialisation */
1184
1185static int __init arkfb_init(void)
1186{
1187
1188#ifndef MODULE
1189        char *option = NULL;
1190
1191        if (fb_get_options("arkfb", &option))
1192                return -ENODEV;
1193
1194        if (option && *option)
1195                mode_option = option;
1196#endif
1197
1198        pr_debug("arkfb: initializing\n");
1199        return pci_register_driver(&arkfb_pci_driver);
1200}
1201
1202module_init(arkfb_init);
1203module_exit(arkfb_cleanup);
1204