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