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/slab.h>
  20 #include <linux/delay.h>
  21 #include <linux/init.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/fb.h>
  24
  25 #include <asm/machvec.h>
  26 #include <asm/uaccess.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/io.h>
  29 #include <asm/hd64461.h>
  30 #include <asm/cpu/dac.h>
  31
  32 #define WIDTH 640
  33
  34 static struct fb_var_screeninfo hitfb_var __initdata = {
  35         .activate       = FB_ACTIVATE_NOW,
  36         .height         = -1,
  37         .width          = -1,
  38         .vmode          = FB_VMODE_NONINTERLACED,
  39 };
  40
  41 static struct fb_fix_screeninfo hitfb_fix __initdata = {
  42         .id             = "Hitachi HD64461",
  43         .type           = FB_TYPE_PACKED_PIXELS,
  44         .accel          = FB_ACCEL_NONE,
  45 };
  46
  47 static u32 pseudo_palette[16];
  48 static struct fb_info fb_info;
  49
  50 static inline void hitfb_accel_wait(void)
  51 {
  52         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  53 }
  54
  55 static inline void hitfb_accel_start(int truecolor)
  56 {
  57         if (truecolor) {
  58                 fb_writew(6, HD64461_GRCFGR);
  59         } else {
  60                 fb_writew(7, HD64461_GRCFGR);
  61         }
  62 }
  63
  64 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  65                                         u16 width, u16 height)
  66 {
  67         u32 saddr = WIDTH * dy + dx;
  68         if (truecolor)
  69                 saddr <<= 1;
  70
  71         fb_writew(width-1, HD64461_BBTDWR);
  72         fb_writew(height-1, HD64461_BBTDHR);
  73
  74         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  75         fb_writew(saddr >> 16, HD64461_BBTDSARH);
  76
  77 }
  78
  79 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  80                                       u16 dy, u16 width, u16 height, u16 rop,
  81                                       u32 mask_addr)
  82 {
  83         u32 saddr, daddr;
  84         u32 maddr = 0;
  85
  86         height--;
  87         width--;
  88         fb_writew(rop, HD64461_BBTROPR);
  89         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
  90                 saddr = WIDTH * (sy + height) + sx + width;
  91                 daddr = WIDTH * (dy + height) + dx + width;
  92                 if (mask_addr) {
  93                         if (truecolor)
  94                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
  95                         else
  96                                 maddr =
  97                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
  98
  99                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
 100                 } else
 101                         fb_writew(1, HD64461_BBTMDR);
 102         } else {
 103                 saddr = WIDTH * sy + sx;
 104                 daddr = WIDTH * dy + dx;
 105                 if (mask_addr) {
 106                         fb_writew((1 << 5), HD64461_BBTMDR);
 107                 } else {
 108                         fb_writew(0, HD64461_BBTMDR);
 109                 }
 110         }
 111         if (truecolor) {
 112                 saddr <<= 1;
 113                 daddr <<= 1;
 114         }
 115         fb_writew(width, HD64461_BBTDWR);
 116         fb_writew(height, HD64461_BBTDHR);
 117         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 118         fb_writew(saddr >> 16, HD64461_BBTSSARH);
 119         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 120         fb_writew(daddr >> 16, HD64461_BBTDSARH);
 121         if (mask_addr) {
 122                 maddr += mask_addr;
 123                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
 124                 fb_writew(maddr >> 16, HD64461_BBTMARH);
 125         }
 126         hitfb_accel_start(truecolor);
 127 }
 128
 129 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 130 {
 131         if (rect->rop != ROP_COPY)
 132                 cfb_fillrect(p, rect);
 133         else {
 134                 hitfb_accel_wait();
 135                 fb_writew(0x00f0, HD64461_BBTROPR);
 136                 fb_writew(16, HD64461_BBTMDR);
 137
 138                 if (p->var.bits_per_pixel == 16) {
 139                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 140                                   HD64461_GRSCR);
 141                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 142                                              rect->height);
 143                         hitfb_accel_start(1);
 144                 } else {
 145                         fb_writew(rect->color, HD64461_GRSCR);
 146                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 147                                              rect->height);
 148                         hitfb_accel_start(0);
 149                 }
 150         }
 151 }
 152
 153 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 154 {
 155         hitfb_accel_wait();
 156         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 157                            area->dx, area->dy, area->width, area->height,
 158                            0x00cc, 0);
 159 }
 160
 161 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 162                              struct fb_info *info)
 163 {
 164         int xoffset = var->xoffset;
 165         int yoffset = var->yoffset;
 166
 167         if (xoffset != 0)
 168                 return -EINVAL;
 169
 170         fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
 171
 172         return 0;
 173 }
 174
 175 int hitfb_blank(int blank_mode, struct fb_info *info)
 176 {
 177         unsigned short v;
 178
 179         if (blank_mode) {
 180                 v = fb_readw(HD64461_LDR1);
 181                 v &= ~HD64461_LDR1_DON;
 182                 fb_writew(v, HD64461_LDR1);
 183
 184                 v = fb_readw(HD64461_LCDCCR);
 185                 v |= HD64461_LCDCCR_MOFF;
 186                 fb_writew(v, HD64461_LCDCCR);
 187
 188                 v = fb_readw(HD64461_STBCR);
 189                 v |= HD64461_STBCR_SLCDST;
 190                 fb_writew(v, HD64461_STBCR);
 191         } else {
 192                 v = fb_readw(HD64461_STBCR);
 193                 v &= ~HD64461_STBCR_SLCDST;
 194                 fb_writew(v, HD64461_STBCR);
 195
 196                 v = fb_readw(HD64461_LCDCCR);
 197                 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
 198                 fb_writew(v, HD64461_LCDCCR);
 199
 200                 do {
 201                     v = fb_readw(HD64461_LCDCCR);
 202                 } while(v&HD64461_LCDCCR_STBACK);
 203
 204                 v = fb_readw(HD64461_LDR1);
 205                 v |= HD64461_LDR1_DON;
 206                 fb_writew(v, HD64461_LDR1);
 207         }
 208         return 0;
 209 }
 210
 211 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 212                            unsigned blue, unsigned transp, struct fb_info *info)
 213 {
 214         if (regno >= 256)
 215                 return 1;
 216
 217         switch (info->var.bits_per_pixel) {
 218         case 8:
 219                 fb_writew(regno << 8, HD64461_CPTWAR);
 220                 fb_writew(red >> 10, HD64461_CPTWDR);
 221                 fb_writew(green >> 10, HD64461_CPTWDR);
 222                 fb_writew(blue >> 10, HD64461_CPTWDR);
 223                 break;
 224         case 16:
 225                 if (regno >= 16)
 226                         return 1;
 227                 ((u32 *) (info->pseudo_palette))[regno] =
 228                     ((red & 0xf800)) |
 229                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 230                 break;
 231         }
 232         return 0;
 233 }
 234
 235 static int hitfb_sync(struct fb_info *info)
 236 {
 237         hitfb_accel_wait();
 238
 239         return 0;
 240 }
 241
 242 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 243 {
 244         int maxy;
 245
 246         var->xres = info->var.xres;
 247         var->xres_virtual = info->var.xres;
 248         var->yres = info->var.yres;
 249
 250         if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
 251                 var->bits_per_pixel = info->var.bits_per_pixel;
 252
 253         if (var->yres_virtual < var->yres)
 254                 var->yres_virtual = var->yres;
 255
 256         maxy = info->fix.smem_len / var->xres;
 257
 258         if (var->bits_per_pixel == 16)
 259                 maxy /= 2;
 260
 261         if (var->yres_virtual > maxy)
 262                 var->yres_virtual = maxy;
 263
 264         var->xoffset = 0;
 265         var->yoffset = 0;
 266
 267         switch (var->bits_per_pixel) {
 268         case 8:
 269                 var->red.offset = 0;
 270                 var->red.length = 8;
 271                 var->green.offset = 0;
 272                 var->green.length = 8;
 273                 var->blue.offset = 0;
 274                 var->blue.length = 8;
 275                 var->transp.offset = 0;
 276                 var->transp.length = 0;
 277                 break;
 278         case 16:                /* RGB 565 */
 279                 var->red.offset = 11;
 280                 var->red.length = 5;
 281                 var->green.offset = 5;
 282                 var->green.length = 6;
 283                 var->blue.offset = 0;
 284                 var->blue.length = 5;
 285                 var->transp.offset = 0;
 286                 var->transp.length = 0;
 287                 break;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static int hitfb_set_par(struct fb_info *info)
 294 {
 295         unsigned short ldr3;
 296
 297         switch (info->var.bits_per_pixel) {
 298         case 8:
 299                 info->fix.line_length = info->var.xres;
 300                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 301                 info->fix.ypanstep = 16;
 302                 break;
 303         case 16:
 304                 info->fix.line_length = info->var.xres*2;
 305                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 306                 info->fix.ypanstep = 8;
 307                 break;
 308         }
 309
 310         fb_writew(info->fix.line_length, HD64461_LCDCLOR);
 311         ldr3 = fb_readw(HD64461_LDR3);
 312         ldr3 &= ~15;
 313         ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
 314         fb_writew(ldr3, HD64461_LDR3);
 315         return 0;
 316 }
 317
 318 static struct fb_ops hitfb_ops = {
 319         .owner          = THIS_MODULE,
 320         .fb_check_var   = hitfb_check_var,
 321         .fb_set_par             = hitfb_set_par,
 322         .fb_setcolreg   = hitfb_setcolreg,
 323         .fb_blank       = hitfb_blank,
 324         .fb_sync        = hitfb_sync,
 325         .fb_pan_display = hitfb_pan_display,
 326         .fb_fillrect    = hitfb_fillrect,
 327         .fb_copyarea    = hitfb_copyarea,
 328         .fb_imageblit   = cfb_imageblit,
 329 };
 330
 331 static int __init hitfb_probe(struct platform_device *dev)
 332 {
 333         unsigned short lcdclor, ldr3, ldvndr;
 334
 335         if (fb_get_options("hitfb", NULL))
 336                 return -ENODEV;
 337
 338         hitfb_fix.mmio_start = CONFIG_HD64461_IOBASE+0x1000;
 339         hitfb_fix.mmio_len = 0x1000;
 340         hitfb_fix.smem_start = CONFIG_HD64461_IOBASE + 0x02000000;
 341         hitfb_fix.smem_len = 512 * 1024;
 342
 343         lcdclor = fb_readw(HD64461_LCDCLOR);
 344         ldvndr = fb_readw(HD64461_LDVNDR);
 345         ldr3 = fb_readw(HD64461_LDR3);
 346
 347         switch (ldr3 & 15) {
 348         default:
 349         case 4:
 350                 hitfb_var.bits_per_pixel = 8;
 351                 hitfb_var.xres = lcdclor;
 352                 break;
 353         case 8:
 354                 hitfb_var.bits_per_pixel = 16;
 355                 hitfb_var.xres = lcdclor / 2;
 356                 break;
 357         }
 358         hitfb_fix.line_length = lcdclor;
 359         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 360             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 361         hitfb_var.yres = ldvndr + 1;
 362         hitfb_var.xres_virtual = hitfb_var.xres;
 363         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 364         switch (hitfb_var.bits_per_pixel) {
 365         case 8:
 366                 hitfb_var.red.offset = 0;
 367                 hitfb_var.red.length = 8;
 368                 hitfb_var.green.offset = 0;
 369                 hitfb_var.green.length = 8;
 370                 hitfb_var.blue.offset = 0;
 371                 hitfb_var.blue.length = 8;
 372                 hitfb_var.transp.offset = 0;
 373                 hitfb_var.transp.length = 0;
 374                 break;
 375         case 16:                /* RGB 565 */
 376                 hitfb_var.red.offset = 11;
 377                 hitfb_var.red.length = 5;
 378                 hitfb_var.green.offset = 5;
 379                 hitfb_var.green.length = 6;
 380                 hitfb_var.blue.offset = 0;
 381                 hitfb_var.blue.length = 5;
 382                 hitfb_var.transp.offset = 0;
 383                 hitfb_var.transp.length = 0;
 384                 break;
 385         }
 386
 387         fb_info.fbops = &hitfb_ops;
 388         fb_info.var = hitfb_var;
 389         fb_info.fix = hitfb_fix;
 390         fb_info.pseudo_palette = pseudo_palette;
 391         fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
 392                 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
 393
 394         fb_info.screen_base = (void *)hitfb_fix.smem_start;
 395
 396         fb_alloc_cmap(&fb_info.cmap, 256, 0);
 397
 398         if (register_framebuffer(&fb_info) < 0)
 399                 return -EINVAL;
 400
 401         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 402                fb_info.node, fb_info.fix.id);
 403         return 0;
 404 }
 405
 406 static int __exit hitfb_remove(struct platform_device *dev)
 407 {
 408         return unregister_framebuffer(&fb_info);
 409 }
 410
 411 #ifdef CONFIG_PM
 412 static int hitfb_suspend(struct platform_device *dev, pm_message_t state)
 413 {
 414         u16 v;
 415
 416         hitfb_blank(1,0);
 417         v = fb_readw(HD64461_STBCR);
 418         v |= HD64461_STBCR_SLCKE_IST;
 419         fb_writew(v, HD64461_STBCR);
 420
 421         return 0;
 422 }
 423
 424 static int hitfb_resume(struct platform_device *dev)
 425 {
 426         u16 v;
 427
 428         v = fb_readw(HD64461_STBCR);
 429         v &= ~HD64461_STBCR_SLCKE_OST;
 430         msleep(100);
 431         v = fb_readw(HD64461_STBCR);
 432         v &= ~HD64461_STBCR_SLCKE_IST;
 433         fb_writew(v, HD64461_STBCR);
 434         hitfb_blank(0,0);
 435
 436         return 0;
 437 }
 438 #endif
 439
 440 static struct platform_driver hitfb_driver = {
 441         .probe          = hitfb_probe,
 442         .remove         = __exit_p(hitfb_remove),
 443 #ifdef CONFIG_PM
 444         .suspend        = hitfb_suspend,
 445         .resume         = hitfb_resume,
 446 #endif
 447         .driver         = {
 448                 .name   = "hitfb",
 449         },
 450 };
 451
 452 static struct platform_device hitfb_device = {
 453         .name   = "hitfb",
 454         .id     = -1,
 455 };
 456
 457 static int __init hitfb_init(void)
 458 {
 459         int ret;
 460
 461         ret = platform_driver_register(&hitfb_driver);
 462         if (!ret) {
 463                 ret = platform_device_register(&hitfb_device);
 464                 if (ret)
 465                         platform_driver_unregister(&hitfb_driver);
 466         }
 467         return ret;
 468 }
 469
 470
 471 static void __exit hitfb_exit(void)
 472 {
 473         platform_device_unregister(&hitfb_device);
 474         platform_driver_unregister(&hitfb_driver);
 475 }
 476
 477 module_init(hitfb_init);
 478 module_exit(hitfb_exit);
 479
 480 MODULE_LICENSE("GPL");