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