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