drivers/video/hitfb.c

   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
  33 static struct fb_var_screeninfo hitfb_var = {
  34         .activate       = FB_ACTIVATE_NOW,
  35         .height         = -1,
  36         .width          = -1,
  37         .vmode          = FB_VMODE_NONINTERLACED,
  38 };
  39
  40 static struct fb_fix_screeninfo hitfb_fix = {
  41         .id             = "Hitachi HD64461",
  42         .type           = FB_TYPE_PACKED_PIXELS,
  43         .accel          = FB_ACCEL_NONE,
  44 };
  45
  46 static inline void hitfb_accel_wait(void)
  47 {
  48         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  49 }
  50
  51 static 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
  60 static 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
  75 static 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
 125 static 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
 149 static 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
 157 static 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
 171 int 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
 207 static 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
 231 static int hitfb_sync(struct fb_info *info)
 232 {
 233         hitfb_accel_wait();
 234
 235         return 0;
 236 }
 237
 238 static 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
 289 static 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
 314 static 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
 327 static 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
 413 err:
 414         fb_dealloc_cmap(&info->cmap);
 415 err_fb:
 416         framebuffer_release(info);
 417         return ret;
 418 }
 419
 420 static 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
 431 static 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
 443 static 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
 458 static const struct dev_pm_ops hitfb_dev_pm_ops = {
 459         .suspend        = hitfb_suspend,
 460         .resume         = hitfb_resume,
 461 };
 462
 463 static 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
 473 static struct platform_device hitfb_device = {
 474         .name   = "hitfb",
 475         .id     = -1,
 476 };
 477
 478 static 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
 492 static void __exit hitfb_exit(void)
 493 {
 494         platform_device_unregister(&hitfb_device);
 495         platform_driver_unregister(&hitfb_driver);
 496 }
 497
 498 module_init(hitfb_init);
 499 module_exit(hitfb_exit);
 500
 501 MODULE_LICENSE("GPL");