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