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 #include <asm/hp6xx/hp6xx.h>
  33
  34 #define WIDTH 640
  35
  36 static struct fb_var_screeninfo hitfb_var __initdata = {
  37         .activate       = FB_ACTIVATE_NOW,
  38         .height         = -1,
  39         .width          = -1,
  40         .vmode          = FB_VMODE_NONINTERLACED,
  41 };
  42
  43 static struct fb_fix_screeninfo hitfb_fix __initdata = {
  44         .id             = "Hitachi HD64461",
  45         .type           = FB_TYPE_PACKED_PIXELS,
  46         .accel          = FB_ACCEL_NONE,
  47 };
  48
  49 static u32 pseudo_palette[16];
  50 static struct fb_info fb_info;
  51
  52 static inline void hitfb_accel_wait(void)
  53 {
  54         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  55 }
  56
  57 static inline void hitfb_accel_start(int truecolor)
  58 {
  59         if (truecolor) {
  60                 fb_writew(6, HD64461_GRCFGR);
  61         } else {
  62                 fb_writew(7, HD64461_GRCFGR);
  63         }
  64 }
  65
  66 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  67                                         u16 width, u16 height)
  68 {
  69         u32 saddr = WIDTH * dy + dx;
  70         if (truecolor)
  71                 saddr <<= 1;
  72
  73         fb_writew(width-1, HD64461_BBTDWR);
  74         fb_writew(height-1, HD64461_BBTDHR);
  75
  76         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  77         fb_writew(saddr >> 16, HD64461_BBTDSARH);
  78
  79 }
  80
  81 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  82                                       u16 dy, u16 width, u16 height, u16 rop,
  83                                       u32 mask_addr)
  84 {
  85         u32 saddr, daddr;
  86         u32 maddr = 0;
  87
  88         height--;
  89         width--;
  90         fb_writew(rop, HD64461_BBTROPR);
  91         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
  92                 saddr = WIDTH * (sy + height) + sx + width;
  93                 daddr = WIDTH * (dy + height) + dx + width;
  94                 if (mask_addr) {
  95                         if (truecolor)
  96                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
  97                         else
  98                                 maddr =
  99                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
 100
 101                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
 102                 } else
 103                         fb_writew(1, HD64461_BBTMDR);
 104         } else {
 105                 saddr = WIDTH * sy + sx;
 106                 daddr = WIDTH * dy + dx;
 107                 if (mask_addr) {
 108                         fb_writew((1 << 5), HD64461_BBTMDR);
 109                 } else {
 110                         fb_writew(0, HD64461_BBTMDR);
 111                 }
 112         }
 113         if (truecolor) {
 114                 saddr <<= 1;
 115                 daddr <<= 1;
 116         }
 117         fb_writew(width, HD64461_BBTDWR);
 118         fb_writew(height, HD64461_BBTDHR);
 119         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 120         fb_writew(saddr >> 16, HD64461_BBTSSARH);
 121         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 122         fb_writew(daddr >> 16, HD64461_BBTDSARH);
 123         if (mask_addr) {
 124                 maddr += mask_addr;
 125                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
 126                 fb_writew(maddr >> 16, HD64461_BBTMARH);
 127         }
 128         hitfb_accel_start(truecolor);
 129 }
 130
 131 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 132 {
 133         if (rect->rop != ROP_COPY)
 134                 cfb_fillrect(p, rect);
 135         else {
 136                 hitfb_accel_wait();
 137                 fb_writew(0x00f0, HD64461_BBTROPR);
 138                 fb_writew(16, HD64461_BBTMDR);
 139
 140                 if (p->var.bits_per_pixel == 16) {
 141                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 142                                   HD64461_GRSCR);
 143                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 144                                              rect->height);
 145                         hitfb_accel_start(1);
 146                 } else {
 147                         fb_writew(rect->color, HD64461_GRSCR);
 148                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 149                                              rect->height);
 150                         hitfb_accel_start(0);
 151                 }
 152         }
 153 }
 154
 155 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 156 {
 157         hitfb_accel_wait();
 158         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 159                            area->dx, area->dy, area->width, area->height,
 160                            0x00cc, 0);
 161 }
 162
 163 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 164                              struct fb_info *info)
 165 {
 166         int xoffset = var->xoffset;
 167         int yoffset = var->yoffset;
 168
 169         if (xoffset != 0)
 170                 return -EINVAL;
 171
 172         fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
 173
 174         return 0;
 175 }
 176
 177 int hitfb_blank(int blank_mode, struct fb_info *info)
 178 {
 179         unsigned short v;
 180
 181         if (blank_mode) {
 182                 v = fb_readw(HD64461_LDR1);
 183                 v &= ~HD64461_LDR1_DON;
 184                 fb_writew(v, HD64461_LDR1);
 185
 186                 v = fb_readw(HD64461_LCDCCR);
 187                 v |= HD64461_LCDCCR_MOFF;
 188                 fb_writew(v, HD64461_LCDCCR);
 189
 190                 v = fb_readw(HD64461_STBCR);
 191                 v |= HD64461_STBCR_SLCDST;
 192                 fb_writew(v, HD64461_STBCR);
 193         } else {
 194                 v = fb_readw(HD64461_STBCR);
 195                 v &= ~HD64461_STBCR_SLCDST;
 196                 fb_writew(v, HD64461_STBCR);
 197
 198                 v = fb_readw(HD64461_LCDCCR);
 199                 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
 200                 fb_writew(v, HD64461_LCDCCR);
 201
 202                 do {
 203                     v = fb_readw(HD64461_LCDCCR);
 204                 } while(v&HD64461_LCDCCR_STBACK);
 205
 206                 v = fb_readw(HD64461_LDR1);
 207                 v |= HD64461_LDR1_DON;
 208                 fb_writew(v, HD64461_LDR1);
 209         }
 210         return 0;
 211 }
 212
 213 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 214                            unsigned blue, unsigned transp, struct fb_info *info)
 215 {
 216         if (regno >= 256)
 217                 return 1;
 218
 219         switch (info->var.bits_per_pixel) {
 220         case 8:
 221                 fb_writew(regno << 8, HD64461_CPTWAR);
 222                 fb_writew(red >> 10, HD64461_CPTWDR);
 223                 fb_writew(green >> 10, HD64461_CPTWDR);
 224                 fb_writew(blue >> 10, HD64461_CPTWDR);
 225                 break;
 226         case 16:
 227                 if (regno >= 16)
 228                         return 1;
 229                 ((u32 *) (info->pseudo_palette))[regno] =
 230                     ((red & 0xf800)) |
 231                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 232                 break;
 233         }
 234         return 0;
 235 }
 236
 237 static int hitfb_sync(struct fb_info *info)
 238 {
 239         hitfb_accel_wait();
 240
 241         return 0;
 242 }
 243
 244 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 245 {
 246         int maxy;
 247
 248         var->xres = info->var.xres;
 249         var->xres_virtual = info->var.xres;
 250         var->yres = info->var.yres;
 251
 252         if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
 253                 var->bits_per_pixel = info->var.bits_per_pixel;
 254
 255         if (var->yres_virtual < var->yres)
 256                 var->yres_virtual = var->yres;
 257
 258         maxy = info->fix.smem_len / var->xres;
 259
 260         if (var->bits_per_pixel == 16)
 261                 maxy /= 2;
 262
 263         if (var->yres_virtual > maxy)
 264                 var->yres_virtual = maxy;
 265
 266         var->xoffset = 0;
 267         var->yoffset = 0;
 268
 269         switch (var->bits_per_pixel) {
 270         case 8:
 271                 var->red.offset = 0;
 272                 var->red.length = 8;
 273                 var->green.offset = 0;
 274                 var->green.length = 8;
 275                 var->blue.offset = 0;
 276                 var->blue.length = 8;
 277                 var->transp.offset = 0;
 278                 var->transp.length = 0;
 279                 break;
 280         case 16:                /* RGB 565 */
 281                 var->red.offset = 11;
 282                 var->red.length = 5;
 283                 var->green.offset = 5;
 284                 var->green.length = 6;
 285                 var->blue.offset = 0;
 286                 var->blue.length = 5;
 287                 var->transp.offset = 0;
 288                 var->transp.length = 0;
 289                 break;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static int hitfb_set_par(struct fb_info *info)
 296 {
 297         unsigned short ldr3;
 298
 299         switch (info->var.bits_per_pixel) {
 300         case 8:
 301                 info->fix.line_length = info->var.xres;
 302                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 303                 info->fix.ypanstep = 16;
 304                 break;
 305         case 16:
 306                 info->fix.line_length = info->var.xres*2;
 307                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 308                 info->fix.ypanstep = 8;
 309                 break;
 310         }
 311
 312         fb_writew(info->fix.line_length, HD64461_LCDCLOR);
 313         ldr3 = fb_readw(HD64461_LDR3);
 314         ldr3 &= ~15;
 315         ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
 316         fb_writew(ldr3, HD64461_LDR3);
 317         return 0;
 318 }
 319
 320 static struct fb_ops hitfb_ops = {
 321         .owner          = THIS_MODULE,
 322         .fb_check_var   = hitfb_check_var,
 323         .fb_set_par             = hitfb_set_par,
 324         .fb_setcolreg   = hitfb_setcolreg,
 325         .fb_blank       = hitfb_blank,
 326         .fb_sync        = hitfb_sync,
 327         .fb_pan_display = hitfb_pan_display,
 328         .fb_fillrect    = hitfb_fillrect,
 329         .fb_copyarea    = hitfb_copyarea,
 330         .fb_imageblit   = cfb_imageblit,
 331 };
 332
 333 static int __init hitfb_probe(struct platform_device *dev)
 334 {
 335         unsigned short lcdclor, ldr3, ldvndr;
 336
 337         if (fb_get_options("hitfb", NULL))
 338                 return -ENODEV;
 339
 340         hitfb_fix.mmio_start = CONFIG_HD64461_IOBASE+0x1000;
 341         hitfb_fix.mmio_len = 0x1000;
 342         hitfb_fix.smem_start = CONFIG_HD64461_IOBASE + 0x02000000;
 343         hitfb_fix.smem_len = 512 * 1024;
 344
 345         lcdclor = fb_readw(HD64461_LCDCLOR);
 346         ldvndr = fb_readw(HD64461_LDVNDR);
 347         ldr3 = fb_readw(HD64461_LDR3);
 348
 349         switch (ldr3 & 15) {
 350         default:
 351         case 4:
 352                 hitfb_var.bits_per_pixel = 8;
 353                 hitfb_var.xres = lcdclor;
 354                 break;
 355         case 8:
 356                 hitfb_var.bits_per_pixel = 16;
 357                 hitfb_var.xres = lcdclor / 2;
 358                 break;
 359         }
 360         hitfb_fix.line_length = lcdclor;
 361         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 362             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 363         hitfb_var.yres = ldvndr + 1;
 364         hitfb_var.xres_virtual = hitfb_var.xres;
 365         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 366         switch (hitfb_var.bits_per_pixel) {
 367         case 8:
 368                 hitfb_var.red.offset = 0;
 369                 hitfb_var.red.length = 8;
 370                 hitfb_var.green.offset = 0;
 371                 hitfb_var.green.length = 8;
 372                 hitfb_var.blue.offset = 0;
 373                 hitfb_var.blue.length = 8;
 374                 hitfb_var.transp.offset = 0;
 375                 hitfb_var.transp.length = 0;
 376                 break;
 377         case 16:                /* RGB 565 */
 378                 hitfb_var.red.offset = 11;
 379                 hitfb_var.red.length = 5;
 380                 hitfb_var.green.offset = 5;
 381                 hitfb_var.green.length = 6;
 382                 hitfb_var.blue.offset = 0;
 383                 hitfb_var.blue.length = 5;
 384                 hitfb_var.transp.offset = 0;
 385                 hitfb_var.transp.length = 0;
 386                 break;
 387         }
 388
 389         fb_info.fbops = &hitfb_ops;
 390         fb_info.var = hitfb_var;
 391         fb_info.fix = hitfb_fix;
 392         fb_info.pseudo_palette = pseudo_palette;
 393         fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
 394                 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
 395
 396         fb_info.screen_base = (void *)hitfb_fix.smem_start;
 397
 398         fb_alloc_cmap(&fb_info.cmap, 256, 0);
 399
 400         if (register_framebuffer(&fb_info) < 0)
 401                 return -EINVAL;
 402
 403         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 404                fb_info.node, fb_info.fix.id);
 405         return 0;
 406 }
 407
 408 static int __devexit hitfb_remove(struct platform_device *dev)
 409 {
 410         return unregister_framebuffer(&fb_info);
 411 }
 412
 413 #ifdef CONFIG_PM
 414 static int hitfb_suspend(struct platform_device *dev, pm_message_t state)
 415 {
 416         u16 v;
 417
 418         hitfb_blank(1,0);
 419         v = fb_readw(HD64461_STBCR);
 420         v |= HD64461_STBCR_SLCKE_IST;
 421         fb_writew(v, HD64461_STBCR);
 422
 423         return 0;
 424 }
 425
 426 static int hitfb_resume(struct platform_device *dev)
 427 {
 428         u16 v;
 429
 430         v = fb_readw(HD64461_STBCR);
 431         v &= ~HD64461_STBCR_SLCKE_OST;
 432         msleep(100);
 433         v = fb_readw(HD64461_STBCR);
 434         v &= ~HD64461_STBCR_SLCKE_IST;
 435         fb_writew(v, HD64461_STBCR);
 436         hitfb_blank(0,0);
 437
 438         return 0;
 439 }
 440 #endif
 441
 442 static struct platform_driver hitfb_driver = {
 443         .probe          = hitfb_probe,
 444         .remove         = __devexit_p(hitfb_remove),
 445 #ifdef CONFIG_PM
 446         .suspend        = hitfb_suspend,
 447         .resume         = hitfb_resume,
 448 #endif
 449         .driver         = {
 450                 .name   = "hitfb",
 451         },
 452 };
 453
 454 static struct platform_device hitfb_device = {
 455         .name   = "hitfb",
 456         .id     = -1,
 457 };
 458
 459 static int __init hitfb_init(void)
 460 {
 461         int ret;
 462
 463         ret = platform_driver_register(&hitfb_driver);
 464         if (!ret) {
 465                 ret = platform_device_register(&hitfb_device);
 466                 if (ret)
 467                         platform_driver_unregister(&hitfb_driver);
 468         }
 469         return ret;
 470 }
 471
 472
 473 static void __exit hitfb_exit(void)
 474 {
 475         platform_device_unregister(&hitfb_device);
 476         platform_driver_unregister(&hitfb_driver);
 477 }
 478
 479 module_init(hitfb_init);
 480 module_exit(hitfb_exit);
 481
 482 MODULE_LICENSE("GPL");