linux/drivers/video/hitfb.c
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   1/*
   2 * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
   3 *
   4 * (C) 1999 Mihai Spatar
   5 * (C) 2000 YAEGASHI Takeshi
   6 * (C) 2003, 2004 Paul Mundt
   7 * (C) 2003, 2004, 2006 Andriy Skulysh
   8 *
   9 *  This file is subject to the terms and conditions of the GNU General Public
  10 *  License. See the file COPYING in the main directory of this archive for
  11 *  more details.
  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/delay.h>
  20#include <linux/init.h>
  21#include <linux/platform_device.h>
  22#include <linux/fb.h>
  23
  24#include <asm/machvec.h>
  25#include <asm/uaccess.h>
  26#include <asm/pgtable.h>
  27#include <asm/io.h>
  28#include <asm/hd64461.h>
  29#include <cpu/dac.h>
  30
  31#define WIDTH 640
  32
  33static struct fb_var_screeninfo hitfb_var = {
  34        .activate       = FB_ACTIVATE_NOW,
  35        .height         = -1,
  36        .width          = -1,
  37        .vmode          = FB_VMODE_NONINTERLACED,
  38};
  39
  40static struct fb_fix_screeninfo hitfb_fix = {
  41        .id             = "Hitachi HD64461",
  42        .type           = FB_TYPE_PACKED_PIXELS,
  43        .accel          = FB_ACCEL_NONE,
  44};
  45
  46static inline void hitfb_accel_wait(void)
  47{
  48        while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  49}
  50
  51static inline void hitfb_accel_start(int truecolor)
  52{
  53        if (truecolor) {
  54                fb_writew(6, HD64461_GRCFGR);
  55        } else {
  56                fb_writew(7, HD64461_GRCFGR);
  57        }
  58}
  59
  60static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  61                                        u16 width, u16 height)
  62{
  63        u32 saddr = WIDTH * dy + dx;
  64        if (truecolor)
  65                saddr <<= 1;
  66
  67        fb_writew(width-1, HD64461_BBTDWR);
  68        fb_writew(height-1, HD64461_BBTDHR);
  69
  70        fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  71        fb_writew(saddr >> 16, HD64461_BBTDSARH);
  72
  73}
  74
  75static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  76                                      u16 dy, u16 width, u16 height, u16 rop,
  77                                      u32 mask_addr)
  78{
  79        u32 saddr, daddr;
  80        u32 maddr = 0;
  81
  82        height--;
  83        width--;
  84        fb_writew(rop, HD64461_BBTROPR);
  85        if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
  86                saddr = WIDTH * (sy + height) + sx + width;
  87                daddr = WIDTH * (dy + height) + dx + width;
  88                if (mask_addr) {
  89                        if (truecolor)
  90                                maddr = ((width >> 3) + 1) * (height + 1) - 1;
  91                        else
  92                                maddr =
  93                                    (((width >> 4) + 1) * (height + 1) - 1) * 2;
  94
  95                        fb_writew((1 << 5) | 1, HD64461_BBTMDR);
  96                } else
  97                        fb_writew(1, HD64461_BBTMDR);
  98        } else {
  99                saddr = WIDTH * sy + sx;
 100                daddr = WIDTH * dy + dx;
 101                if (mask_addr) {
 102                        fb_writew((1 << 5), HD64461_BBTMDR);
 103                } else {
 104                        fb_writew(0, HD64461_BBTMDR);
 105                }
 106        }
 107        if (truecolor) {
 108                saddr <<= 1;
 109                daddr <<= 1;
 110        }
 111        fb_writew(width, HD64461_BBTDWR);
 112        fb_writew(height, HD64461_BBTDHR);
 113        fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 114        fb_writew(saddr >> 16, HD64461_BBTSSARH);
 115        fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 116        fb_writew(daddr >> 16, HD64461_BBTDSARH);
 117        if (mask_addr) {
 118                maddr += mask_addr;
 119                fb_writew(maddr & 0xffff, HD64461_BBTMARL);
 120                fb_writew(maddr >> 16, HD64461_BBTMARH);
 121        }
 122        hitfb_accel_start(truecolor);
 123}
 124
 125static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 126{
 127        if (rect->rop != ROP_COPY)
 128                cfb_fillrect(p, rect);
 129        else {
 130                hitfb_accel_wait();
 131                fb_writew(0x00f0, HD64461_BBTROPR);
 132                fb_writew(16, HD64461_BBTMDR);
 133
 134                if (p->var.bits_per_pixel == 16) {
 135                        fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 136                                  HD64461_GRSCR);
 137                        hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 138                                             rect->height);
 139                        hitfb_accel_start(1);
 140                } else {
 141                        fb_writew(rect->color, HD64461_GRSCR);
 142                        hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 143                                             rect->height);
 144                        hitfb_accel_start(0);
 145                }
 146        }
 147}
 148
 149static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 150{
 151        hitfb_accel_wait();
 152        hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 153                           area->dx, area->dy, area->width, area->height,
 154                           0x00cc, 0);
 155}
 156
 157static int hitfb_pan_display(struct fb_var_screeninfo *var,
 158                             struct fb_info *info)
 159{
 160        int xoffset = var->xoffset;
 161        int yoffset = var->yoffset;
 162
 163        if (xoffset != 0)
 164                return -EINVAL;
 165
 166        fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
 167
 168        return 0;
 169}
 170
 171int hitfb_blank(int blank_mode, struct fb_info *info)
 172{
 173        unsigned short v;
 174
 175        if (blank_mode) {
 176                v = fb_readw(HD64461_LDR1);
 177                v &= ~HD64461_LDR1_DON;
 178                fb_writew(v, HD64461_LDR1);
 179
 180                v = fb_readw(HD64461_LCDCCR);
 181                v |= HD64461_LCDCCR_MOFF;
 182                fb_writew(v, HD64461_LCDCCR);
 183
 184                v = fb_readw(HD64461_STBCR);
 185                v |= HD64461_STBCR_SLCDST;
 186                fb_writew(v, HD64461_STBCR);
 187        } else {
 188                v = fb_readw(HD64461_STBCR);
 189                v &= ~HD64461_STBCR_SLCDST;
 190                fb_writew(v, HD64461_STBCR);
 191
 192                v = fb_readw(HD64461_LCDCCR);
 193                v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
 194                fb_writew(v, HD64461_LCDCCR);
 195
 196                do {
 197                    v = fb_readw(HD64461_LCDCCR);
 198                } while(v&HD64461_LCDCCR_STBACK);
 199
 200                v = fb_readw(HD64461_LDR1);
 201                v |= HD64461_LDR1_DON;
 202                fb_writew(v, HD64461_LDR1);
 203        }
 204        return 0;
 205}
 206
 207static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 208                           unsigned blue, unsigned transp, struct fb_info *info)
 209{
 210        if (regno >= 256)
 211                return 1;
 212
 213        switch (info->var.bits_per_pixel) {
 214        case 8:
 215                fb_writew(regno << 8, HD64461_CPTWAR);
 216                fb_writew(red >> 10, HD64461_CPTWDR);
 217                fb_writew(green >> 10, HD64461_CPTWDR);
 218                fb_writew(blue >> 10, HD64461_CPTWDR);
 219                break;
 220        case 16:
 221                if (regno >= 16)
 222                        return 1;
 223                ((u32 *) (info->pseudo_palette))[regno] =
 224                    ((red & 0xf800)) |
 225                    ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 226                break;
 227        }
 228        return 0;
 229}
 230
 231static int hitfb_sync(struct fb_info *info)
 232{
 233        hitfb_accel_wait();
 234
 235        return 0;
 236}
 237
 238static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 239{
 240        int maxy;
 241
 242        var->xres = info->var.xres;
 243        var->xres_virtual = info->var.xres;
 244        var->yres = info->var.yres;
 245
 246        if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
 247                var->bits_per_pixel = info->var.bits_per_pixel;
 248
 249        if (var->yres_virtual < var->yres)
 250                var->yres_virtual = var->yres;
 251
 252        maxy = info->fix.smem_len / var->xres;
 253
 254        if (var->bits_per_pixel == 16)
 255                maxy /= 2;
 256
 257        if (var->yres_virtual > maxy)
 258                var->yres_virtual = maxy;
 259
 260        var->xoffset = 0;
 261        var->yoffset = 0;
 262
 263        switch (var->bits_per_pixel) {
 264        case 8:
 265                var->red.offset = 0;
 266                var->red.length = 8;
 267                var->green.offset = 0;
 268                var->green.length = 8;
 269                var->blue.offset = 0;
 270                var->blue.length = 8;
 271                var->transp.offset = 0;
 272                var->transp.length = 0;
 273                break;
 274        case 16:                /* RGB 565 */
 275                var->red.offset = 11;
 276                var->red.length = 5;
 277                var->green.offset = 5;
 278                var->green.length = 6;
 279                var->blue.offset = 0;
 280                var->blue.length = 5;
 281                var->transp.offset = 0;
 282                var->transp.length = 0;
 283                break;
 284        }
 285
 286        return 0;
 287}
 288
 289static int hitfb_set_par(struct fb_info *info)
 290{
 291        unsigned short ldr3;
 292
 293        switch (info->var.bits_per_pixel) {
 294        case 8:
 295                info->fix.line_length = info->var.xres;
 296                info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 297                info->fix.ypanstep = 16;
 298                break;
 299        case 16:
 300                info->fix.line_length = info->var.xres*2;
 301                info->fix.visual = FB_VISUAL_TRUECOLOR;
 302                info->fix.ypanstep = 8;
 303                break;
 304        }
 305
 306        fb_writew(info->fix.line_length, HD64461_LCDCLOR);
 307        ldr3 = fb_readw(HD64461_LDR3);
 308        ldr3 &= ~15;
 309        ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
 310        fb_writew(ldr3, HD64461_LDR3);
 311        return 0;
 312}
 313
 314static struct fb_ops hitfb_ops = {
 315        .owner          = THIS_MODULE,
 316        .fb_check_var   = hitfb_check_var,
 317        .fb_set_par             = hitfb_set_par,
 318        .fb_setcolreg   = hitfb_setcolreg,
 319        .fb_blank       = hitfb_blank,
 320        .fb_sync        = hitfb_sync,
 321        .fb_pan_display = hitfb_pan_display,
 322        .fb_fillrect    = hitfb_fillrect,
 323        .fb_copyarea    = hitfb_copyarea,
 324        .fb_imageblit   = cfb_imageblit,
 325};
 326
 327static int hitfb_probe(struct platform_device *dev)
 328{
 329        unsigned short lcdclor, ldr3, ldvndr;
 330        struct fb_info *info;
 331        int ret;
 332
 333        if (fb_get_options("hitfb", NULL))
 334                return -ENODEV;
 335
 336        hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
 337        hitfb_fix.mmio_len = 0x1000;
 338        hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
 339        hitfb_fix.smem_len = 512 * 1024;
 340
 341        lcdclor = fb_readw(HD64461_LCDCLOR);
 342        ldvndr = fb_readw(HD64461_LDVNDR);
 343        ldr3 = fb_readw(HD64461_LDR3);
 344
 345        switch (ldr3 & 15) {
 346        default:
 347        case 4:
 348                hitfb_var.bits_per_pixel = 8;
 349                hitfb_var.xres = lcdclor;
 350                break;
 351        case 8:
 352                hitfb_var.bits_per_pixel = 16;
 353                hitfb_var.xres = lcdclor / 2;
 354                break;
 355        }
 356        hitfb_fix.line_length = lcdclor;
 357        hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 358            FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 359        hitfb_var.yres = ldvndr + 1;
 360        hitfb_var.xres_virtual = hitfb_var.xres;
 361        hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 362        switch (hitfb_var.bits_per_pixel) {
 363        case 8:
 364                hitfb_var.red.offset = 0;
 365                hitfb_var.red.length = 8;
 366                hitfb_var.green.offset = 0;
 367                hitfb_var.green.length = 8;
 368                hitfb_var.blue.offset = 0;
 369                hitfb_var.blue.length = 8;
 370                hitfb_var.transp.offset = 0;
 371                hitfb_var.transp.length = 0;
 372                break;
 373        case 16:                /* RGB 565 */
 374                hitfb_var.red.offset = 11;
 375                hitfb_var.red.length = 5;
 376                hitfb_var.green.offset = 5;
 377                hitfb_var.green.length = 6;
 378                hitfb_var.blue.offset = 0;
 379                hitfb_var.blue.length = 5;
 380                hitfb_var.transp.offset = 0;
 381                hitfb_var.transp.length = 0;
 382                break;
 383        }
 384
 385        info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
 386        if (unlikely(!info))
 387                return -ENOMEM;
 388
 389        info->fbops = &hitfb_ops;
 390        info->var = hitfb_var;
 391        info->fix = hitfb_fix;
 392        info->pseudo_palette = info->par;
 393        info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
 394                FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
 395
 396        info->screen_base = (void *)hitfb_fix.smem_start;
 397
 398        ret = fb_alloc_cmap(&info->cmap, 256, 0);
 399        if (unlikely(ret < 0))
 400                goto err_fb;
 401
 402        ret = register_framebuffer(info);
 403        if (unlikely(ret < 0))
 404                goto err;
 405
 406        platform_set_drvdata(dev, info);
 407
 408        printk(KERN_INFO "fb%d: %s frame buffer device\n",
 409               info->node, info->fix.id);
 410
 411        return 0;
 412
 413err:
 414        fb_dealloc_cmap(&info->cmap);
 415err_fb:
 416        framebuffer_release(info);
 417        return ret;
 418}
 419
 420static int hitfb_remove(struct platform_device *dev)
 421{
 422        struct fb_info *info = platform_get_drvdata(dev);
 423
 424        unregister_framebuffer(info);
 425        fb_dealloc_cmap(&info->cmap);
 426        framebuffer_release(info);
 427
 428        return 0;
 429}
 430
 431static int hitfb_suspend(struct device *dev)
 432{
 433        u16 v;
 434
 435        hitfb_blank(1,0);
 436        v = fb_readw(HD64461_STBCR);
 437        v |= HD64461_STBCR_SLCKE_IST;
 438        fb_writew(v, HD64461_STBCR);
 439
 440        return 0;
 441}
 442
 443static int hitfb_resume(struct device *dev)
 444{
 445        u16 v;
 446
 447        v = fb_readw(HD64461_STBCR);
 448        v &= ~HD64461_STBCR_SLCKE_OST;
 449        msleep(100);
 450        v = fb_readw(HD64461_STBCR);
 451        v &= ~HD64461_STBCR_SLCKE_IST;
 452        fb_writew(v, HD64461_STBCR);
 453        hitfb_blank(0,0);
 454
 455        return 0;
 456}
 457
 458static const struct dev_pm_ops hitfb_dev_pm_ops = {
 459        .suspend        = hitfb_suspend,
 460        .resume         = hitfb_resume,
 461};
 462
 463static struct platform_driver hitfb_driver = {
 464        .probe          = hitfb_probe,
 465        .remove         = hitfb_remove,
 466        .driver         = {
 467                .name   = "hitfb",
 468                .owner  = THIS_MODULE,
 469                .pm     = &hitfb_dev_pm_ops,
 470        },
 471};
 472
 473static struct platform_device hitfb_device = {
 474        .name   = "hitfb",
 475        .id     = -1,
 476};
 477
 478static int __init hitfb_init(void)
 479{
 480        int ret;
 481
 482        ret = platform_driver_register(&hitfb_driver);
 483        if (!ret) {
 484                ret = platform_device_register(&hitfb_device);
 485                if (ret)
 486                        platform_driver_unregister(&hitfb_driver);
 487        }
 488        return ret;
 489}
 490
 491
 492static void __exit hitfb_exit(void)
 493{
 494        platform_device_unregister(&hitfb_device);
 495        platform_driver_unregister(&hitfb_driver);
 496}
 497
 498module_init(hitfb_init);
 499module_exit(hitfb_exit);
 500
 501MODULE_LICENSE("GPL");
 502
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