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   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/config.h>
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/sched.h>
  18 #include <linux/errno.h>
  19 #include <linux/string.h>
  20 #include <linux/mm.h>
  21 #include <linux/tty.h>
  22 #include <linux/slab.h>
  23 #include <linux/delay.h>
  24 #include <linux/init.h>
  25 #include <linux/fb.h>
  26
  27 #include <asm/machvec.h>
  28 #include <asm/uaccess.h>
  29 #include <asm/pgtable.h>
  30 #include <asm/io.h>
  31 #include <asm/hd64461/hd64461.h>
  32
  33 #ifdef MACH_HP600
  34 #include <asm/cpu/dac.h>
  35 #include <asm/hp6xx/hp6xx.h>
  36 #endif
  37
  38 #define WIDTH 640
  39
  40 static struct fb_var_screeninfo hitfb_var __initdata = {
  41         .activate       = FB_ACTIVATE_NOW,
  42         .height         = -1,
  43         .width          = -1,
  44         .vmode          = FB_VMODE_NONINTERLACED,
  45 };
  46
  47 static struct fb_fix_screeninfo hitfb_fix __initdata = {
  48         .id             = "Hitachi HD64461",
  49         .type           = FB_TYPE_PACKED_PIXELS,
  50         .ypanstep       = 8,
  51         .accel          = FB_ACCEL_NONE,
  52 };
  53
  54 static u32 pseudo_palette[16];
  55 static struct fb_info fb_info;
  56
  57 static inline void hitfb_accel_wait(void)
  58 {
  59         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
  60 }
  61
  62 static inline void hitfb_accel_start(int truecolor)
  63 {
  64         if (truecolor) {
  65                 fb_writew(6, HD64461_GRCFGR);
  66         } else {
  67                 fb_writew(7, HD64461_GRCFGR);
  68         }
  69 }
  70
  71 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
  72                                         u16 width, u16 height)
  73 {
  74         u32 saddr = WIDTH * dy + dx;
  75         if (truecolor)
  76                 saddr <<= 1;
  77
  78         fb_writew(width, HD64461_BBTDWR);
  79         fb_writew(height, HD64461_BBTDHR);
  80
  81         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
  82         fb_writew(saddr >> 16, HD64461_BBTDSARH);
  83
  84 }
  85
  86 static inline void hitfb_accel_solidfill(int truecolor, u16 dx, u16 dy,
  87                                          u16 width, u16 height, u16 color)
  88 {
  89         hitfb_accel_set_dest(truecolor, dx, dy, width, height);
  90
  91         fb_writew(0x00f0, HD64461_BBTROPR);
  92         fb_writew(16, HD64461_BBTMDR);
  93         fb_writew(color, HD64461_GRSCR);
  94
  95         hitfb_accel_start(truecolor);
  96 }
  97
  98 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
  99                                       u16 dy, u16 width, u16 height, u16 rop,
 100                                       u32 mask_addr)
 101 {
 102         u32 saddr, daddr;
 103         u32 maddr = 0;
 104
 105         fb_writew(rop, HD64461_BBTROPR);
 106         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
 107                 saddr = WIDTH * (sy + height) + sx + width;
 108                 daddr = WIDTH * (dy + height) + dx + width;
 109                 if (mask_addr) {
 110                         if (truecolor)
 111                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
 112                         else
 113                                 maddr =
 114                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
 115
 116                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
 117                 } else
 118                         fb_writew(1, HD64461_BBTMDR);
 119         } else {
 120                 saddr = WIDTH * sy + sx;
 121                 daddr = WIDTH * dy + dx;
 122                 if (mask_addr) {
 123                         fb_writew((1 << 5), HD64461_BBTMDR);
 124                 } else {
 125                         fb_writew(0, HD64461_BBTMDR);
 126                 }
 127         }
 128         if (truecolor) {
 129                 saddr <<= 1;
 130                 daddr <<= 1;
 131         }
 132         fb_writew(width, HD64461_BBTDWR);
 133         fb_writew(height, HD64461_BBTDHR);
 134         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 135         fb_writew(saddr >> 16, HD64461_BBTSSARH);
 136         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 137         fb_writew(daddr >> 16, HD64461_BBTDSARH);
 138         if (mask_addr) {
 139                 maddr += mask_addr;
 140                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
 141                 fb_writew(maddr >> 16, HD64461_BBTMARH);
 142         }
 143         hitfb_accel_start(truecolor);
 144 }
 145
 146 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 147 {
 148         if (rect->rop != ROP_COPY)
 149                 cfb_fillrect(p, rect);
 150         else {
 151                 fb_writew(0x00f0, HD64461_BBTROPR);
 152                 fb_writew(16, HD64461_BBTMDR);
 153
 154                 if (p->var.bits_per_pixel == 16) {
 155                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 156                                   HD64461_GRSCR);
 157                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 158                                              rect->height);
 159                         hitfb_accel_start(1);
 160                 } else {
 161                         fb_writew(rect->color, HD64461_GRSCR);
 162                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 163                                              rect->height);
 164                         hitfb_accel_start(0);
 165                 }
 166                 hitfb_accel_wait();
 167         }
 168 }
 169
 170 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 171 {
 172         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 173                            area->dx, area->dy, area->width, area->height,
 174                            0x00cc, 0);
 175         hitfb_accel_wait();
 176 }
 177
 178 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 179                              struct fb_info *info)
 180 {
 181         int xoffset = var->xoffset;
 182         int yoffset = var->yoffset;
 183
 184         if (xoffset != 0)
 185                 return -EINVAL;
 186
 187         fb_writew(yoffset, HD64461_LCDCBAR);
 188
 189         return 0;
 190 }
 191
 192 int hitfb_blank(int blank_mode, struct fb_info *info)
 193 {
 194         unsigned short v;
 195
 196         if (blank_mode) {
 197 #ifdef MACH_HP600
 198                 sh_dac_disable(DAC_LCD_BRIGHTNESS);
 199                 v = fb_readw(HD64461_GPBDR);
 200                 v |= HD64461_GPBDR_LCDOFF;
 201                 fb_writew(v, HD64461_GPBDR);
 202 #endif
 203                 v = fb_readw(HD64461_LDR1);
 204                 v &= ~HD64461_LDR1_DON;
 205                 fb_writew(v, HD64461_LDR1);
 206
 207                 v = fb_readw(HD64461_LCDCCR);
 208                 v |= HD64461_LCDCCR_MOFF;
 209                 fb_writew(v, HD64461_LCDCCR);
 210
 211                 v = fb_readw(HD64461_STBCR);
 212                 v |= HD64461_STBCR_SLCDST;
 213                 fb_writew(v, HD64461_STBCR);
 214         } else {
 215                 v = fb_readw(HD64461_STBCR);
 216                 v &= ~HD64461_STBCR_SLCDST;
 217                 fb_writew(v, HD64461_STBCR);
 218 #ifdef MACH_HP600
 219                 sh_dac_enable(DAC_LCD_BRIGHTNESS);
 220                 v = fb_readw(HD64461_GPBDR);
 221                 v &= ~HD64461_GPBDR_LCDOFF;
 222                 fb_writew(v, HD64461_GPBDR);
 223 #endif
 224                 v = fb_readw(HD64461_LDR1);
 225                 v |= HD64461_LDR1_DON;
 226                 fb_writew(v, HD64461_LDR1);
 227
 228                 v = fb_readw(HD64461_LCDCCR);
 229                 v &= ~HD64461_LCDCCR_MOFF;
 230                 fb_writew(v, HD64461_LCDCCR);
 231         }
 232         return 0;
 233 }
 234
 235 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 236                            unsigned blue, unsigned transp, struct fb_info *info)
 237 {
 238         if (regno >= info->cmap.len)
 239                 return 1;
 240
 241         switch (info->var.bits_per_pixel) {
 242         case 8:
 243                 fb_writew(regno << 8, HD64461_CPTWAR);
 244                 fb_writew(red >> 10, HD64461_CPTWDR);
 245                 fb_writew(green >> 10, HD64461_CPTWDR);
 246                 fb_writew(blue >> 10, HD64461_CPTWDR);
 247                 break;
 248         case 16:
 249                 ((u32 *) (info->pseudo_palette))[regno] =
 250                     ((red & 0xf800)) |
 251                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 252                 break;
 253         }
 254         return 0;
 255 }
 256
 257 static struct fb_ops hitfb_ops = {
 258         .owner          = THIS_MODULE,
 259         .fb_setcolreg   = hitfb_setcolreg,
 260         .fb_blank       = hitfb_blank,
 261         .fb_pan_display = hitfb_pan_display,
 262         .fb_fillrect    = hitfb_fillrect,
 263         .fb_copyarea    = hitfb_copyarea,
 264         .fb_imageblit   = cfb_imageblit,
 265         .fb_cursor      = soft_cursor,
 266 };
 267
 268 int __init hitfb_init(void)
 269 {
 270         unsigned short lcdclor, ldr3, ldvndr;
 271         int size;
 272
 273         if (fb_get_options("hitfb", NULL))
 274                 return -ENODEV;
 275
 276         hitfb_fix.smem_start = CONFIG_HD64461_IOBASE + 0x02000000;
 277         hitfb_fix.smem_len = (MACH_HP690) ? 1024 * 1024 : 512 * 1024;
 278
 279         lcdclor = fb_readw(HD64461_LCDCLOR);
 280         ldvndr = fb_readw(HD64461_LDVNDR);
 281         ldr3 = fb_readw(HD64461_LDR3);
 282
 283         switch (ldr3 & 15) {
 284         default:
 285         case 4:
 286                 hitfb_var.bits_per_pixel = 8;
 287                 hitfb_var.xres = lcdclor;
 288                 break;
 289         case 8:
 290                 hitfb_var.bits_per_pixel = 16;
 291                 hitfb_var.xres = lcdclor / 2;
 292                 break;
 293         }
 294         hitfb_fix.line_length = lcdclor;
 295         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 296             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 297         hitfb_var.yres = ldvndr + 1;
 298         hitfb_var.xres_virtual = hitfb_var.xres;
 299         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 300         switch (hitfb_var.bits_per_pixel) {
 301         case 8:
 302                 hitfb_var.red.offset = 0;
 303                 hitfb_var.red.length = 8;
 304                 hitfb_var.green.offset = 0;
 305                 hitfb_var.green.length = 8;
 306                 hitfb_var.blue.offset = 0;
 307                 hitfb_var.blue.length = 8;
 308                 hitfb_var.transp.offset = 0;
 309                 hitfb_var.transp.length = 0;
 310                 break;
 311         case 16:                /* RGB 565 */
 312                 hitfb_var.red.offset = 11;
 313                 hitfb_var.red.length = 5;
 314                 hitfb_var.green.offset = 5;
 315                 hitfb_var.green.length = 6;
 316                 hitfb_var.blue.offset = 0;
 317                 hitfb_var.blue.length = 5;
 318                 hitfb_var.transp.offset = 0;
 319                 hitfb_var.transp.length = 0;
 320                 break;
 321         }
 322
 323         fb_info.fbops = &hitfb_ops;
 324         fb_info.var = hitfb_var;
 325         fb_info.fix = hitfb_fix;
 326         fb_info.pseudo_palette = pseudo_palette;
 327         fb_info.flags = FBINFO_DEFAULT;
 328
 329         fb_info.screen_base = (void *)hitfb_fix.smem_start;
 330
 331         size = (fb_info.var.bits_per_pixel == 8) ? 256 : 16;
 332         fb_alloc_cmap(&fb_info.cmap, size, 0);
 333
 334         if (register_framebuffer(&fb_info) < 0)
 335                 return -EINVAL;
 336
 337         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 338                fb_info.node, fb_info.fix.id);
 339         return 0;
 340 }
 341
 342 static void __exit hitfb_exit(void)
 343 {
 344         unregister_framebuffer(&fb_info);
 345 }
 346
 347 module_init(hitfb_init);
 348 module_exit(hitfb_exit);
 349
 350 MODULE_LICENSE("GPL");