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