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 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/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/hd64461.h>
  30
  31 #ifdef MACH_HP600
  32 #include <asm/cpu/dac.h>
  33 #include <asm/hp6xx/hp6xx.h>
  34 #endif
  35
  36 #define WIDTH 640
  37
  38 static struct fb_var_screeninfo hitfb_var __initdata = {
  39         .activate       = FB_ACTIVATE_NOW,
  40         .height         = -1,
  41         .width          = -1,
  42         .vmode          = FB_VMODE_NONINTERLACED,
  43 };
  44
  45 static struct fb_fix_screeninfo hitfb_fix __initdata = {
  46         .id             = "Hitachi HD64461",
  47         .type           = FB_TYPE_PACKED_PIXELS,
  48         .ypanstep       = 8,
  49         .accel          = FB_ACCEL_NONE,
  50 };
  51
  52 static u32 pseudo_palette[16];
  53 static struct fb_info fb_info;
  54
  55 static inline void hitfb_accel_wait(void)
  56 {
  57         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  58 }
  59
  60 static inline void hitfb_accel_start(int truecolor)
  61 {
  62         if (truecolor) {
  63                 fb_writew(6, HD64461_GRCFGR);
  64         } else {
  65                 fb_writew(7, HD64461_GRCFGR);
  66         }
  67 }
  68
  69 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  70                                         u16 width, u16 height)
  71 {
  72         u32 saddr = WIDTH * dy + dx;
  73         if (truecolor)
  74                 saddr <<= 1;
  75
  76         fb_writew(width, HD64461_BBTDWR);
  77         fb_writew(height, HD64461_BBTDHR);
  78
  79         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  80         fb_writew(saddr >> 16, HD64461_BBTDSARH);
  81
  82 }
  83
  84 static inline void hitfb_accel_solidfill(int truecolor, u16 dx, u16 dy,
  85                                          u16 width, u16 height, u16 color)
  86 {
  87         hitfb_accel_set_dest(truecolor, dx, dy, width, height);
  88
  89         fb_writew(0x00f0, HD64461_BBTROPR);
  90         fb_writew(16, HD64461_BBTMDR);
  91         fb_writew(color, HD64461_GRSCR);
  92
  93         hitfb_accel_start(truecolor);
  94 }
  95
  96 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  97                                       u16 dy, u16 width, u16 height, u16 rop,
  98                                       u32 mask_addr)
  99 {
 100         u32 saddr, daddr;
 101         u32 maddr = 0;
 102
 103         fb_writew(rop, HD64461_BBTROPR);
 104         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
 105                 saddr = WIDTH * (sy + height) + sx + width;
 106                 daddr = WIDTH * (dy + height) + dx + width;
 107                 if (mask_addr) {
 108                         if (truecolor)
 109                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
 110                         else
 111                                 maddr =
 112                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
 113
 114                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
 115                 } else
 116                         fb_writew(1, HD64461_BBTMDR);
 117         } else {
 118                 saddr = WIDTH * sy + sx;
 119                 daddr = WIDTH * dy + dx;
 120                 if (mask_addr) {
 121                         fb_writew((1 << 5), HD64461_BBTMDR);
 122                 } else {
 123                         fb_writew(0, HD64461_BBTMDR);
 124                 }
 125         }
 126         if (truecolor) {
 127                 saddr <<= 1;
 128                 daddr <<= 1;
 129         }
 130         fb_writew(width, HD64461_BBTDWR);
 131         fb_writew(height, HD64461_BBTDHR);
 132         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 133         fb_writew(saddr >> 16, HD64461_BBTSSARH);
 134         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 135         fb_writew(daddr >> 16, HD64461_BBTDSARH);
 136         if (mask_addr) {
 137                 maddr += mask_addr;
 138                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
 139                 fb_writew(maddr >> 16, HD64461_BBTMARH);
 140         }
 141         hitfb_accel_start(truecolor);
 142 }
 143
 144 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 145 {
 146         if (rect->rop != ROP_COPY)
 147                 cfb_fillrect(p, rect);
 148         else {
 149                 fb_writew(0x00f0, HD64461_BBTROPR);
 150                 fb_writew(16, HD64461_BBTMDR);
 151
 152                 if (p->var.bits_per_pixel == 16) {
 153                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 154                                   HD64461_GRSCR);
 155                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 156                                              rect->height);
 157                         hitfb_accel_start(1);
 158                 } else {
 159                         fb_writew(rect->color, HD64461_GRSCR);
 160                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 161                                              rect->height);
 162                         hitfb_accel_start(0);
 163                 }
 164                 hitfb_accel_wait();
 165         }
 166 }
 167
 168 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 169 {
 170         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 171                            area->dx, area->dy, area->width, area->height,
 172                            0x00cc, 0);
 173         hitfb_accel_wait();
 174 }
 175
 176 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 177                              struct fb_info *info)
 178 {
 179         int xoffset = var->xoffset;
 180         int yoffset = var->yoffset;
 181
 182         if (xoffset != 0)
 183                 return -EINVAL;
 184
 185         fb_writew(yoffset, HD64461_LCDCBAR);
 186
 187         return 0;
 188 }
 189
 190 int hitfb_blank(int blank_mode, struct fb_info *info)
 191 {
 192         unsigned short v;
 193
 194         if (blank_mode) {
 195 #ifdef MACH_HP600
 196                 sh_dac_disable(DAC_LCD_BRIGHTNESS);
 197                 v = fb_readw(HD64461_GPBDR);
 198                 v |= HD64461_GPBDR_LCDOFF;
 199                 fb_writew(v, HD64461_GPBDR);
 200 #endif
 201                 v = fb_readw(HD64461_LDR1);
 202                 v &= ~HD64461_LDR1_DON;
 203                 fb_writew(v, HD64461_LDR1);
 204
 205                 v = fb_readw(HD64461_LCDCCR);
 206                 v |= HD64461_LCDCCR_MOFF;
 207                 fb_writew(v, HD64461_LCDCCR);
 208
 209                 v = fb_readw(HD64461_STBCR);
 210                 v |= HD64461_STBCR_SLCDST;
 211                 fb_writew(v, HD64461_STBCR);
 212         } else {
 213                 v = fb_readw(HD64461_STBCR);
 214                 v &= ~HD64461_STBCR_SLCDST;
 215                 fb_writew(v, HD64461_STBCR);
 216 #ifdef MACH_HP600
 217                 sh_dac_enable(DAC_LCD_BRIGHTNESS);
 218                 v = fb_readw(HD64461_GPBDR);
 219                 v &= ~HD64461_GPBDR_LCDOFF;
 220                 fb_writew(v, HD64461_GPBDR);
 221 #endif
 222                 v = fb_readw(HD64461_LDR1);
 223                 v |= HD64461_LDR1_DON;
 224                 fb_writew(v, HD64461_LDR1);
 225
 226                 v = fb_readw(HD64461_LCDCCR);
 227                 v &= ~HD64461_LCDCCR_MOFF;
 228                 fb_writew(v, HD64461_LCDCCR);
 229         }
 230         return 0;
 231 }
 232
 233 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 234                            unsigned blue, unsigned transp, struct fb_info *info)
 235 {
 236         if (regno >= info->cmap.len)
 237                 return 1;
 238
 239         switch (info->var.bits_per_pixel) {
 240         case 8:
 241                 fb_writew(regno << 8, HD64461_CPTWAR);
 242                 fb_writew(red >> 10, HD64461_CPTWDR);
 243                 fb_writew(green >> 10, HD64461_CPTWDR);
 244                 fb_writew(blue >> 10, HD64461_CPTWDR);
 245                 break;
 246         case 16:
 247                 ((u32 *) (info->pseudo_palette))[regno] =
 248                     ((red & 0xf800)) |
 249                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 250                 break;
 251         }
 252         return 0;
 253 }
 254
 255 static struct fb_ops hitfb_ops = {
 256         .owner          = THIS_MODULE,
 257         .fb_setcolreg   = hitfb_setcolreg,
 258         .fb_blank       = hitfb_blank,
 259         .fb_pan_display = hitfb_pan_display,
 260         .fb_fillrect    = hitfb_fillrect,
 261         .fb_copyarea    = hitfb_copyarea,
 262         .fb_imageblit   = cfb_imageblit,
 263 };
 264
 265 int __init hitfb_init(void)
 266 {
 267         unsigned short lcdclor, ldr3, ldvndr;
 268         int size;
 269
 270         if (fb_get_options("hitfb", NULL))
 271                 return -ENODEV;
 272
 273         hitfb_fix.smem_start = CONFIG_HD64461_IOBASE + 0x02000000;
 274         hitfb_fix.smem_len = (MACH_HP690) ? 1024 * 1024 : 512 * 1024;
 275
 276         lcdclor = fb_readw(HD64461_LCDCLOR);
 277         ldvndr = fb_readw(HD64461_LDVNDR);
 278         ldr3 = fb_readw(HD64461_LDR3);
 279
 280         switch (ldr3 & 15) {
 281         default:
 282         case 4:
 283                 hitfb_var.bits_per_pixel = 8;
 284                 hitfb_var.xres = lcdclor;
 285                 break;
 286         case 8:
 287                 hitfb_var.bits_per_pixel = 16;
 288                 hitfb_var.xres = lcdclor / 2;
 289                 break;
 290         }
 291         hitfb_fix.line_length = lcdclor;
 292         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 293             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 294         hitfb_var.yres = ldvndr + 1;
 295         hitfb_var.xres_virtual = hitfb_var.xres;
 296         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 297         switch (hitfb_var.bits_per_pixel) {
 298         case 8:
 299                 hitfb_var.red.offset = 0;
 300                 hitfb_var.red.length = 8;
 301                 hitfb_var.green.offset = 0;
 302                 hitfb_var.green.length = 8;
 303                 hitfb_var.blue.offset = 0;
 304                 hitfb_var.blue.length = 8;
 305                 hitfb_var.transp.offset = 0;
 306                 hitfb_var.transp.length = 0;
 307                 break;
 308         case 16:                /* RGB 565 */
 309                 hitfb_var.red.offset = 11;
 310                 hitfb_var.red.length = 5;
 311                 hitfb_var.green.offset = 5;
 312                 hitfb_var.green.length = 6;
 313                 hitfb_var.blue.offset = 0;
 314                 hitfb_var.blue.length = 5;
 315                 hitfb_var.transp.offset = 0;
 316                 hitfb_var.transp.length = 0;
 317                 break;
 318         }
 319
 320         fb_info.fbops = &hitfb_ops;
 321         fb_info.var = hitfb_var;
 322         fb_info.fix = hitfb_fix;
 323         fb_info.pseudo_palette = pseudo_palette;
 324         fb_info.flags = FBINFO_DEFAULT;
 325
 326         fb_info.screen_base = (void *)hitfb_fix.smem_start;
 327
 328         size = (fb_info.var.bits_per_pixel == 8) ? 256 : 16;
 329         fb_alloc_cmap(&fb_info.cmap, size, 0);
 330
 331         if (register_framebuffer(&fb_info) < 0)
 332                 return -EINVAL;
 333
 334         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 335                fb_info.node, fb_info.fix.id);
 336         return 0;
 337 }
 338
 339 static void __exit hitfb_exit(void)
 340 {
 341         unregister_framebuffer(&fb_info);
 342 }
 343
 344 module_init(hitfb_init);
 345 module_exit(hitfb_exit);
 346
 347 MODULE_LICENSE("GPL");