drivers/video/mb862xx/mb862xxfb_accel.c

   1 /*
   2  * drivers/mb862xx/mb862xxfb_accel.c
   3  *
   4  * Fujitsu Carmine/Coral-P(A)/Lime framebuffer driver acceleration support
   5  *
   6  * (C) 2007 Alexander Shishkin <virtuoso@slind.org>
   7  * (C) 2009 Valentin Sitdikov <valentin.sitdikov@siemens.com>
   8  * (C) 2009 Siemens AG
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15 #include <linux/fb.h>
  16 #include <linux/delay.h>
  17 #include <linux/init.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/pci.h>
  20 #include <linux/slab.h>
  21 #if defined(CONFIG_OF)
  22 #include <linux/of_platform.h>
  23 #endif
  24 #include "mb862xxfb.h"
  25 #include "mb862xx_reg.h"
  26 #include "mb862xxfb_accel.h"
  27
  28 static void mb862xxfb_write_fifo(u32 count, u32 *data, struct fb_info *info)
  29 {
  30         struct mb862xxfb_par *par = info->par;
  31         static u32 free;
  32
  33         u32 total = 0;
  34         while (total < count) {
  35                 if (free) {
  36                         outreg(geo, GDC_GEO_REG_INPUT_FIFO, data[total]);
  37                         total++;
  38                         free--;
  39                 } else {
  40                         free = (u32) inreg(draw, GDC_REG_FIFO_COUNT);
  41                 }
  42         }
  43 }
  44
  45 static void mb86290fb_copyarea(struct fb_info *info,
  46                                const struct fb_copyarea *area)
  47 {
  48         __u32 cmd[6];
  49
  50         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
  51         /* Set raster operation */
  52         cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
  53         cmd[2] = GDC_TYPE_BLTCOPYP << 24;
  54
  55         if (area->sx >= area->dx && area->sy >= area->dy)
  56                 cmd[2] |= GDC_CMD_BLTCOPY_TOP_LEFT << 16;
  57         else if (area->sx >= area->dx && area->sy <= area->dy)
  58                 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_LEFT << 16;
  59         else if (area->sx <= area->dx && area->sy >= area->dy)
  60                 cmd[2] |= GDC_CMD_BLTCOPY_TOP_RIGHT << 16;
  61         else
  62                 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_RIGHT << 16;
  63
  64         cmd[3] = (area->sy << 16) | area->sx;
  65         cmd[4] = (area->dy << 16) | area->dx;
  66         cmd[5] = (area->height << 16) | area->width;
  67         mb862xxfb_write_fifo(6, cmd, info);
  68 }
  69
  70 /*
  71  * Fill in the cmd array /GDC FIFO commands/ to draw a 1bit image.
  72  * Make sure cmd has enough room!
  73  */
  74 static void mb86290fb_imageblit1(u32 *cmd, u16 step, u16 dx, u16 dy,
  75                                  u16 width, u16 height, u32 fgcolor,
  76                                  u32 bgcolor, const struct fb_image *image,
  77                                  struct fb_info *info)
  78 {
  79         int i;
  80         unsigned const char *line;
  81         u16 bytes;
  82
  83         /* set colors and raster operation regs */
  84         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
  85         /* Set raster operation */
  86         cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
  87         cmd[2] =
  88             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
  89         cmd[3] = fgcolor;
  90         cmd[4] =
  91             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_BACK_COLOR << 16);
  92         cmd[5] = bgcolor;
  93
  94         i = 0;
  95         line = image->data;
  96         bytes = (image->width + 7) >> 3;
  97
  98         /* and the image */
  99         cmd[6] = (GDC_TYPE_DRAWBITMAPP << 24) |
 100             (GDC_CMD_BITMAP << 16) | (2 + (step * height));
 101         cmd[7] = (dy << 16) | dx;
 102         cmd[8] = (height << 16) | width;
 103
 104         while (i < height) {
 105                 memcpy(&cmd[9 + i * step], line, step << 2);
 106 #ifdef __LITTLE_ENDIAN
 107                 {
 108                         int k = 0;
 109                         for (k = 0; k < step; k++)
 110                                 cmd[9 + i * step + k] =
 111                                     cpu_to_be32(cmd[9 + i * step + k]);
 112                 }
 113 #endif
 114                 line += bytes;
 115                 i++;
 116         }
 117 }
 118
 119 /*
 120  * Fill in the cmd array /GDC FIFO commands/ to draw a 8bit image.
 121  * Make sure cmd has enough room!
 122  */
 123 static void mb86290fb_imageblit8(u32 *cmd, u16 step, u16 dx, u16 dy,
 124                                  u16 width, u16 height, u32 fgcolor,
 125                                  u32 bgcolor, const struct fb_image *image,
 126                                  struct fb_info *info)
 127 {
 128         int i, j;
 129         unsigned const char *line, *ptr;
 130         u16 bytes;
 131
 132         cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
 133             (GDC_CMD_BLT_DRAW << 16) | (2 + (height * step));
 134         cmd[1] = (dy << 16) | dx;
 135         cmd[2] = (height << 16) | width;
 136
 137         i = 0;
 138         line = ptr = image->data;
 139         bytes = image->width;
 140
 141         while (i < height) {
 142                 ptr = line;
 143                 for (j = 0; j < step; j++) {
 144                         cmd[3 + i * step + j] =
 145                             (((u32 *) (info->pseudo_palette))[*ptr]) & 0xffff;
 146                         ptr++;
 147                         cmd[3 + i * step + j] |=
 148                             ((((u32 *) (info->
 149                                         pseudo_palette))[*ptr]) & 0xffff) << 16;
 150                         ptr++;
 151                 }
 152
 153                 line += bytes;
 154                 i++;
 155         }
 156 }
 157
 158 /*
 159  * Fill in the cmd array /GDC FIFO commands/ to draw a 16bit image.
 160  * Make sure cmd has enough room!
 161  */
 162 static void mb86290fb_imageblit16(u32 *cmd, u16 step, u16 dx, u16 dy,
 163                                   u16 width, u16 height, u32 fgcolor,
 164                                   u32 bgcolor, const struct fb_image *image,
 165                                   struct fb_info *info)
 166 {
 167         int i;
 168         unsigned const char *line;
 169         u16 bytes;
 170
 171         i = 0;
 172         line = image->data;
 173         bytes = image->width << 1;
 174
 175         cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
 176             (GDC_CMD_BLT_DRAW << 16) | (2 + step * height);
 177         cmd[1] = (dy << 16) | dx;
 178         cmd[2] = (height << 16) | width;
 179
 180         while (i < height) {
 181                 memcpy(&cmd[3 + i * step], line, step);
 182                 line += bytes;
 183                 i++;
 184         }
 185 }
 186
 187 static void mb86290fb_imageblit(struct fb_info *info,
 188                                 const struct fb_image *image)
 189 {
 190         int mdr;
 191         u32 *cmd = NULL;
 192         void (*cmdfn) (u32 *, u16, u16, u16, u16, u16, u32, u32,
 193                        const struct fb_image *, struct fb_info *) = NULL;
 194         u32 cmdlen;
 195         u32 fgcolor = 0, bgcolor = 0;
 196         u16 step;
 197
 198         u16 width = image->width, height = image->height;
 199         u16 dx = image->dx, dy = image->dy;
 200         int x2, y2, vxres, vyres;
 201
 202         mdr = (GDC_ROP_COPY << 9);
 203         x2 = image->dx + image->width;
 204         y2 = image->dy + image->height;
 205         vxres = info->var.xres_virtual;
 206         vyres = info->var.yres_virtual;
 207         x2 = min(x2, vxres);
 208         y2 = min(y2, vyres);
 209         width = x2 - dx;
 210         height = y2 - dy;
 211
 212         switch (image->depth) {
 213         case 1:
 214                 step = (width + 31) >> 5;
 215                 cmdlen = 9 + height * step;
 216                 cmdfn = mb86290fb_imageblit1;
 217                 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 218                     info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
 219                         fgcolor =
 220                             ((u32 *) (info->pseudo_palette))[image->fg_color];
 221                         bgcolor =
 222                             ((u32 *) (info->pseudo_palette))[image->bg_color];
 223                 } else {
 224                         fgcolor = image->fg_color;
 225                         bgcolor = image->bg_color;
 226                 }
 227
 228                 break;
 229
 230         case 8:
 231                 step = (width + 1) >> 1;
 232                 cmdlen = 3 + height * step;
 233                 cmdfn = mb86290fb_imageblit8;
 234                 break;
 235
 236         case 16:
 237                 step = (width + 1) >> 1;
 238                 cmdlen = 3 + height * step;
 239                 cmdfn = mb86290fb_imageblit16;
 240                 break;
 241
 242         default:
 243                 cfb_imageblit(info, image);
 244                 return;
 245         }
 246
 247         cmd = kmalloc(cmdlen * 4, GFP_DMA);
 248         if (!cmd)
 249                 return cfb_imageblit(info, image);
 250         cmdfn(cmd, step, dx, dy, width, height, fgcolor, bgcolor, image, info);
 251         mb862xxfb_write_fifo(cmdlen, cmd, info);
 252         kfree(cmd);
 253 }
 254
 255 static void mb86290fb_fillrect(struct fb_info *info,
 256                                const struct fb_fillrect *rect)
 257 {
 258
 259         u32 x2, y2, vxres, vyres, height, width, fg;
 260         u32 cmd[7];
 261
 262         vxres = info->var.xres_virtual;
 263         vyres = info->var.yres_virtual;
 264
 265         if (!rect->width || !rect->height || rect->dx > vxres
 266             || rect->dy > vyres)
 267                 return;
 268
 269         /* We could use hardware clipping but on many cards you get around
 270          * hardware clipping by writing to framebuffer directly. */
 271         x2 = rect->dx + rect->width;
 272         y2 = rect->dy + rect->height;
 273         x2 = min(x2, vxres);
 274         y2 = min(y2, vyres);
 275         width = x2 - rect->dx;
 276         height = y2 - rect->dy;
 277         if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 278             info->fix.visual == FB_VISUAL_DIRECTCOLOR)
 279                 fg = ((u32 *) (info->pseudo_palette))[rect->color];
 280         else
 281                 fg = rect->color;
 282
 283         switch (rect->rop) {
 284
 285         case ROP_XOR:
 286                 /* Set raster operation */
 287                 cmd[1] = (2 << 7) | (GDC_ROP_XOR << 9);
 288                 break;
 289
 290         case ROP_COPY:
 291                 /* Set raster operation */
 292                 cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
 293                 break;
 294
 295         }
 296
 297         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
 298         /* cmd[1] set earlier */
 299         cmd[2] =
 300             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
 301         cmd[3] = fg;
 302         cmd[4] = (GDC_TYPE_DRAWRECTP << 24) | (GDC_CMD_BLT_FILL << 16);
 303         cmd[5] = (rect->dy << 16) | (rect->dx);
 304         cmd[6] = (height << 16) | width;
 305
 306         mb862xxfb_write_fifo(7, cmd, info);
 307 }
 308
 309 void mb862xxfb_init_accel(struct fb_info *info, int xres)
 310 {
 311         struct mb862xxfb_par *par = info->par;
 312
 313         if (info->var.bits_per_pixel == 32) {
 314                 info->fbops->fb_fillrect = cfb_fillrect;
 315                 info->fbops->fb_copyarea = cfb_copyarea;
 316                 info->fbops->fb_imageblit = cfb_imageblit;
 317         } else {
 318                 outreg(disp, GC_L0EM, 3);
 319                 info->fbops->fb_fillrect = mb86290fb_fillrect;
 320                 info->fbops->fb_copyarea = mb86290fb_copyarea;
 321                 info->fbops->fb_imageblit = mb86290fb_imageblit;
 322         }
 323         outreg(draw, GDC_REG_DRAW_BASE, 0);
 324         outreg(draw, GDC_REG_MODE_MISC, 0x8000);
 325         outreg(draw, GDC_REG_X_RESOLUTION, xres);
 326
 327         info->flags |=
 328             FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
 329             FBINFO_HWACCEL_IMAGEBLIT;
 330         info->fix.accel = 0xff; /*FIXME: add right define */
 331 }
 332 EXPORT_SYMBOL(mb862xxfb_init_accel);