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 volatile void __iomem *hitfb_offset_to_addr(unsigned int offset)
  46 {
  47         return (__force volatile void __iomem *)(uintptr_t)offset;
  48 }
  49
  50 static u16 hitfb_readw(unsigned int offset)
  51 {
  52         return fb_readw(hitfb_offset_to_addr(offset));
  53 }
  54
  55 static void hitfb_writew(u16 value, unsigned int offset)
  56 {
  57         fb_writew(value, hitfb_offset_to_addr(offset));
  58 }
  59
  60 static inline void hitfb_accel_wait(void)
  61 {
  62         while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS)
  63                 ;
  64 }
  65
  66 static inline void hitfb_accel_start(int truecolor)
  67 {
  68         if (truecolor) {
  69                 hitfb_writew(6, HD64461_GRCFGR);
  70         } else {
  71                 hitfb_writew(7, HD64461_GRCFGR);
  72         }
  73 }
  74
  75 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  76                                         u16 width, u16 height)
  77 {
  78         u32 saddr = WIDTH * dy + dx;
  79         if (truecolor)
  80                 saddr <<= 1;
  81
  82         hitfb_writew(width-1, HD64461_BBTDWR);
  83         hitfb_writew(height-1, HD64461_BBTDHR);
  84
  85         hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  86         hitfb_writew(saddr >> 16, HD64461_BBTDSARH);
  87
  88 }
  89
  90 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  91                                       u16 dy, u16 width, u16 height, u16 rop,
  92                                       u32 mask_addr)
  93 {
  94         u32 saddr, daddr;
  95         u32 maddr = 0;
  96
  97         height--;
  98         width--;
  99         hitfb_writew(rop, HD64461_BBTROPR);
 100         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
 101                 saddr = WIDTH * (sy + height) + sx + width;
 102                 daddr = WIDTH * (dy + height) + dx + width;
 103                 if (mask_addr) {
 104                         if (truecolor)
 105                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
 106                         else
 107                                 maddr =
 108                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
 109
 110                         hitfb_writew((1 << 5) | 1, HD64461_BBTMDR);
 111                 } else
 112                         hitfb_writew(1, HD64461_BBTMDR);
 113         } else {
 114                 saddr = WIDTH * sy + sx;
 115                 daddr = WIDTH * dy + dx;
 116                 if (mask_addr) {
 117                         hitfb_writew((1 << 5), HD64461_BBTMDR);
 118                 } else {
 119                         hitfb_writew(0, HD64461_BBTMDR);
 120                 }
 121         }
 122         if (truecolor) {
 123                 saddr <<= 1;
 124                 daddr <<= 1;
 125         }
 126         hitfb_writew(width, HD64461_BBTDWR);
 127         hitfb_writew(height, HD64461_BBTDHR);
 128         hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 129         hitfb_writew(saddr >> 16, HD64461_BBTSSARH);
 130         hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 131         hitfb_writew(daddr >> 16, HD64461_BBTDSARH);
 132         if (mask_addr) {
 133                 maddr += mask_addr;
 134                 hitfb_writew(maddr & 0xffff, HD64461_BBTMARL);
 135                 hitfb_writew(maddr >> 16, HD64461_BBTMARH);
 136         }
 137         hitfb_accel_start(truecolor);
 138 }
 139
 140 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 141 {
 142         if (rect->rop != ROP_COPY)
 143                 cfb_fillrect(p, rect);
 144         else {
 145                 hitfb_accel_wait();
 146                 hitfb_writew(0x00f0, HD64461_BBTROPR);
 147                 hitfb_writew(16, HD64461_BBTMDR);
 148
 149                 if (p->var.bits_per_pixel == 16) {
 150                         hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 151                                   HD64461_GRSCR);
 152                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 153                                              rect->height);
 154                         hitfb_accel_start(1);
 155                 } else {
 156                         hitfb_writew(rect->color, HD64461_GRSCR);
 157                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 158                                              rect->height);
 159                         hitfb_accel_start(0);
 160                 }
 161         }
 162 }
 163
 164 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 165 {
 166         hitfb_accel_wait();
 167         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 168                            area->dx, area->dy, area->width, area->height,
 169                            0x00cc, 0);
 170 }
 171
 172 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 173                              struct fb_info *info)
 174 {
 175         int xoffset = var->xoffset;
 176         int yoffset = var->yoffset;
 177
 178         if (xoffset != 0)
 179                 return -EINVAL;
 180
 181         hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
 182
 183         return 0;
 184 }
 185
 186 static int hitfb_blank(int blank_mode, struct fb_info *info)
 187 {
 188         unsigned short v;
 189
 190         if (blank_mode) {
 191                 v = hitfb_readw(HD64461_LDR1);
 192                 v &= ~HD64461_LDR1_DON;
 193                 hitfb_writew(v, HD64461_LDR1);
 194
 195                 v = hitfb_readw(HD64461_LCDCCR);
 196                 v |= HD64461_LCDCCR_MOFF;
 197                 hitfb_writew(v, HD64461_LCDCCR);
 198
 199                 v = hitfb_readw(HD64461_STBCR);
 200                 v |= HD64461_STBCR_SLCDST;
 201                 hitfb_writew(v, HD64461_STBCR);
 202         } else {
 203                 v = hitfb_readw(HD64461_STBCR);
 204                 v &= ~HD64461_STBCR_SLCDST;
 205                 hitfb_writew(v, HD64461_STBCR);
 206
 207                 v = hitfb_readw(HD64461_LCDCCR);
 208                 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
 209                 hitfb_writew(v, HD64461_LCDCCR);
 210
 211                 do {
 212                     v = hitfb_readw(HD64461_LCDCCR);
 213                 } while(v&HD64461_LCDCCR_STBACK);
 214
 215                 v = hitfb_readw(HD64461_LDR1);
 216                 v |= HD64461_LDR1_DON;
 217                 hitfb_writew(v, HD64461_LDR1);
 218         }
 219         return 0;
 220 }
 221
 222 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 223                            unsigned blue, unsigned transp, struct fb_info *info)
 224 {
 225         if (regno >= 256)
 226                 return 1;
 227
 228         switch (info->var.bits_per_pixel) {
 229         case 8:
 230                 hitfb_writew(regno << 8, HD64461_CPTWAR);
 231                 hitfb_writew(red >> 10, HD64461_CPTWDR);
 232                 hitfb_writew(green >> 10, HD64461_CPTWDR);
 233                 hitfb_writew(blue >> 10, HD64461_CPTWDR);
 234                 break;
 235         case 16:
 236                 if (regno >= 16)
 237                         return 1;
 238                 ((u32 *) (info->pseudo_palette))[regno] =
 239                     ((red & 0xf800)) |
 240                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 241                 break;
 242         }
 243         return 0;
 244 }
 245
 246 static int hitfb_sync(struct fb_info *info)
 247 {
 248         hitfb_accel_wait();
 249
 250         return 0;
 251 }
 252
 253 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 254 {
 255         int maxy;
 256
 257         var->xres = info->var.xres;
 258         var->xres_virtual = info->var.xres;
 259         var->yres = info->var.yres;
 260
 261         if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
 262                 var->bits_per_pixel = info->var.bits_per_pixel;
 263
 264         if (var->yres_virtual < var->yres)
 265                 var->yres_virtual = var->yres;
 266
 267         maxy = info->fix.smem_len / var->xres;
 268
 269         if (var->bits_per_pixel == 16)
 270                 maxy /= 2;
 271
 272         if (var->yres_virtual > maxy)
 273                 var->yres_virtual = maxy;
 274
 275         var->xoffset = 0;
 276         var->yoffset = 0;
 277
 278         switch (var->bits_per_pixel) {
 279         case 8:
 280                 var->red.offset = 0;
 281                 var->red.length = 8;
 282                 var->green.offset = 0;
 283                 var->green.length = 8;
 284                 var->blue.offset = 0;
 285                 var->blue.length = 8;
 286                 var->transp.offset = 0;
 287                 var->transp.length = 0;
 288                 break;
 289         case 16:                /* RGB 565 */
 290                 var->red.offset = 11;
 291                 var->red.length = 5;
 292                 var->green.offset = 5;
 293                 var->green.length = 6;
 294                 var->blue.offset = 0;
 295                 var->blue.length = 5;
 296                 var->transp.offset = 0;
 297                 var->transp.length = 0;
 298                 break;
 299         }
 300
 301         return 0;
 302 }
 303
 304 static int hitfb_set_par(struct fb_info *info)
 305 {
 306         unsigned short ldr3;
 307
 308         switch (info->var.bits_per_pixel) {
 309         case 8:
 310                 info->fix.line_length = info->var.xres;
 311                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 312                 info->fix.ypanstep = 16;
 313                 break;
 314         case 16:
 315                 info->fix.line_length = info->var.xres*2;
 316                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 317                 info->fix.ypanstep = 8;
 318                 break;
 319         }
 320
 321         hitfb_writew(info->fix.line_length, HD64461_LCDCLOR);
 322         ldr3 = hitfb_readw(HD64461_LDR3);
 323         ldr3 &= ~15;
 324         ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
 325         hitfb_writew(ldr3, HD64461_LDR3);
 326         return 0;
 327 }
 328
 329 static const struct fb_ops hitfb_ops = {
 330         .owner          = THIS_MODULE,
 331         __FB_DEFAULT_IOMEM_OPS_RDWR,
 332         .fb_check_var   = hitfb_check_var,
 333         .fb_set_par     = hitfb_set_par,
 334         .fb_setcolreg   = hitfb_setcolreg,
 335         .fb_blank       = hitfb_blank,
 336         .fb_sync        = hitfb_sync,
 337         .fb_pan_display = hitfb_pan_display,
 338         .fb_fillrect    = hitfb_fillrect,
 339         .fb_copyarea    = hitfb_copyarea,
 340         .fb_imageblit   = cfb_imageblit,
 341         __FB_DEFAULT_IOMEM_OPS_MMAP,
 342 };
 343
 344 static int hitfb_probe(struct platform_device *dev)
 345 {
 346         unsigned short lcdclor, ldr3, ldvndr;
 347         struct fb_info *info;
 348         int ret;
 349
 350         if (fb_get_options("hitfb", NULL))
 351                 return -ENODEV;
 352
 353         hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
 354         hitfb_fix.mmio_len = 0x1000;
 355         hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
 356         hitfb_fix.smem_len = 512 * 1024;
 357
 358         lcdclor = hitfb_readw(HD64461_LCDCLOR);
 359         ldvndr = hitfb_readw(HD64461_LDVNDR);
 360         ldr3 = hitfb_readw(HD64461_LDR3);
 361
 362         switch (ldr3 & 15) {
 363         default:
 364         case 4:
 365                 hitfb_var.bits_per_pixel = 8;
 366                 hitfb_var.xres = lcdclor;
 367                 break;
 368         case 8:
 369                 hitfb_var.bits_per_pixel = 16;
 370                 hitfb_var.xres = lcdclor / 2;
 371                 break;
 372         }
 373         hitfb_fix.line_length = lcdclor;
 374         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 375             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 376         hitfb_var.yres = ldvndr + 1;
 377         hitfb_var.xres_virtual = hitfb_var.xres;
 378         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 379         switch (hitfb_var.bits_per_pixel) {
 380         case 8:
 381                 hitfb_var.red.offset = 0;
 382                 hitfb_var.red.length = 8;
 383                 hitfb_var.green.offset = 0;
 384                 hitfb_var.green.length = 8;
 385                 hitfb_var.blue.offset = 0;
 386                 hitfb_var.blue.length = 8;
 387                 hitfb_var.transp.offset = 0;
 388                 hitfb_var.transp.length = 0;
 389                 break;
 390         case 16:                /* RGB 565 */
 391                 hitfb_var.red.offset = 11;
 392                 hitfb_var.red.length = 5;
 393                 hitfb_var.green.offset = 5;
 394                 hitfb_var.green.length = 6;
 395                 hitfb_var.blue.offset = 0;
 396                 hitfb_var.blue.length = 5;
 397                 hitfb_var.transp.offset = 0;
 398                 hitfb_var.transp.length = 0;
 399                 break;
 400         }
 401
 402         info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
 403         if (unlikely(!info))
 404                 return -ENOMEM;
 405
 406         info->fbops = &hitfb_ops;
 407         info->var = hitfb_var;
 408         info->fix = hitfb_fix;
 409         info->pseudo_palette = info->par;
 410         info->flags = FBINFO_HWACCEL_YPAN |
 411                 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
 412
 413         info->screen_base = (char __iomem *)(uintptr_t)hitfb_fix.smem_start;
 414
 415         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 416         if (unlikely(ret < 0))
 417                 goto err_fb;
 418
 419         ret = register_framebuffer(info);
 420         if (unlikely(ret < 0))
 421                 goto err;
 422
 423         platform_set_drvdata(dev, info);
 424
 425         fb_info(info, "%s frame buffer device\n", info->fix.id);
 426
 427         return 0;
 428
 429 err:
 430         fb_dealloc_cmap(&info->cmap);
 431 err_fb:
 432         framebuffer_release(info);
 433         return ret;
 434 }
 435
 436 static void hitfb_remove(struct platform_device *dev)
 437 {
 438         struct fb_info *info = platform_get_drvdata(dev);
 439
 440         unregister_framebuffer(info);
 441         fb_dealloc_cmap(&info->cmap);
 442         framebuffer_release(info);
 443 }
 444
 445 static int hitfb_suspend(struct device *dev)
 446 {
 447         u16 v;
 448
 449         hitfb_blank(1, NULL);
 450         v = hitfb_readw(HD64461_STBCR);
 451         v |= HD64461_STBCR_SLCKE_IST;
 452         hitfb_writew(v, HD64461_STBCR);
 453
 454         return 0;
 455 }
 456
 457 static int hitfb_resume(struct device *dev)
 458 {
 459         u16 v;
 460
 461         v = hitfb_readw(HD64461_STBCR);
 462         v &= ~HD64461_STBCR_SLCKE_OST;
 463         msleep(100);
 464         v = hitfb_readw(HD64461_STBCR);
 465         v &= ~HD64461_STBCR_SLCKE_IST;
 466         hitfb_writew(v, HD64461_STBCR);
 467         hitfb_blank(0, NULL);
 468
 469         return 0;
 470 }
 471
 472 static const struct dev_pm_ops hitfb_dev_pm_ops = {
 473         .suspend        = hitfb_suspend,
 474         .resume         = hitfb_resume,
 475 };
 476
 477 static struct platform_driver hitfb_driver = {
 478         .probe          = hitfb_probe,
 479         .remove_new     = hitfb_remove,
 480         .driver         = {
 481                 .name   = "hitfb",
 482                 .pm     = &hitfb_dev_pm_ops,
 483         },
 484 };
 485
 486 static struct platform_device hitfb_device = {
 487         .name   = "hitfb",
 488         .id     = -1,
 489 };
 490
 491 static int __init hitfb_init(void)
 492 {
 493         int ret;
 494
 495         ret = platform_driver_register(&hitfb_driver);
 496         if (!ret) {
 497                 ret = platform_device_register(&hitfb_device);
 498                 if (ret)
 499                         platform_driver_unregister(&hitfb_driver);
 500         }
 501         return ret;
 502 }
 503
 504
 505 static void __exit hitfb_exit(void)
 506 {
 507         platform_device_unregister(&hitfb_device);
 508         platform_driver_unregister(&hitfb_driver);
 509 }
 510
 511 module_init(hitfb_init);
 512 module_exit(hitfb_exit);
 513
 514 MODULE_LICENSE("GPL");