drivers/video/fbdev/mb862xx/mb862xxfb_accel.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * drivers/mb862xx/mb862xxfb_accel.c
   4  *
   5  * Fujitsu Carmine/Coral-P(A)/Lime framebuffer driver acceleration support
   6  *
   7  * (C) 2007 Alexander Shishkin <virtuoso@slind.org>
   8  * (C) 2009 Valentin Sitdikov <v.sitdikov@gmail.com>
   9  * (C) 2009 Siemens AG
  10  */
  11 #include <linux/fb.h>
  12 #include <linux/delay.h>
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/pci.h>
  17 #include <linux/slab.h>
  18 #if defined(CONFIG_OF)
  19 #include <linux/of_platform.h>
  20 #endif
  21 #include "mb862xxfb.h"
  22 #include "mb862xx_reg.h"
  23 #include "mb862xxfb_accel.h"
  24
  25 static void mb862xxfb_write_fifo(u32 count, u32 *data, struct fb_info *info)
  26 {
  27         struct mb862xxfb_par *par = info->par;
  28         static u32 free;
  29
  30         u32 total = 0;
  31         while (total < count) {
  32                 if (free) {
  33                         outreg(geo, GDC_GEO_REG_INPUT_FIFO, data[total]);
  34                         total++;
  35                         free--;
  36                 } else {
  37                         free = (u32) inreg(draw, GDC_REG_FIFO_COUNT);
  38                 }
  39         }
  40 }
  41
  42 static void mb86290fb_copyarea(struct fb_info *info,
  43                                const struct fb_copyarea *area)
  44 {
  45         __u32 cmd[6];
  46
  47         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
  48         /* Set raster operation */
  49         cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
  50         cmd[2] = GDC_TYPE_BLTCOPYP << 24;
  51
  52         if (area->sx >= area->dx && area->sy >= area->dy)
  53                 cmd[2] |= GDC_CMD_BLTCOPY_TOP_LEFT << 16;
  54         else if (area->sx >= area->dx && area->sy <= area->dy)
  55                 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_LEFT << 16;
  56         else if (area->sx <= area->dx && area->sy >= area->dy)
  57                 cmd[2] |= GDC_CMD_BLTCOPY_TOP_RIGHT << 16;
  58         else
  59                 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_RIGHT << 16;
  60
  61         cmd[3] = (area->sy << 16) | area->sx;
  62         cmd[4] = (area->dy << 16) | area->dx;
  63         cmd[5] = (area->height << 16) | area->width;
  64         mb862xxfb_write_fifo(6, cmd, info);
  65 }
  66
  67 /*
  68  * Fill in the cmd array /GDC FIFO commands/ to draw a 1bit image.
  69  * Make sure cmd has enough room!
  70  */
  71 static void mb86290fb_imageblit1(u32 *cmd, u16 step, u16 dx, u16 dy,
  72                                  u16 width, u16 height, u32 fgcolor,
  73                                  u32 bgcolor, const struct fb_image *image,
  74                                  struct fb_info *info)
  75 {
  76         int i;
  77         unsigned const char *line;
  78         u16 bytes;
  79
  80         /* set colors and raster operation regs */
  81         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
  82         /* Set raster operation */
  83         cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
  84         cmd[2] =
  85             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
  86         cmd[3] = fgcolor;
  87         cmd[4] =
  88             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_BACK_COLOR << 16);
  89         cmd[5] = bgcolor;
  90
  91         i = 0;
  92         line = image->data;
  93         bytes = (image->width + 7) >> 3;
  94
  95         /* and the image */
  96         cmd[6] = (GDC_TYPE_DRAWBITMAPP << 24) |
  97             (GDC_CMD_BITMAP << 16) | (2 + (step * height));
  98         cmd[7] = (dy << 16) | dx;
  99         cmd[8] = (height << 16) | width;
 100
 101         while (i < height) {
 102                 memcpy(&cmd[9 + i * step], line, step << 2);
 103 #ifdef __LITTLE_ENDIAN
 104                 {
 105                         int k = 0;
 106                         for (k = 0; k < step; k++)
 107                                 cmd[9 + i * step + k] =
 108                                     cpu_to_be32(cmd[9 + i * step + k]);
 109                 }
 110 #endif
 111                 line += bytes;
 112                 i++;
 113         }
 114 }
 115
 116 /*
 117  * Fill in the cmd array /GDC FIFO commands/ to draw a 8bit image.
 118  * Make sure cmd has enough room!
 119  */
 120 static void mb86290fb_imageblit8(u32 *cmd, u16 step, u16 dx, u16 dy,
 121                                  u16 width, u16 height, u32 fgcolor,
 122                                  u32 bgcolor, const struct fb_image *image,
 123                                  struct fb_info *info)
 124 {
 125         int i, j;
 126         unsigned const char *line, *ptr;
 127         u16 bytes;
 128
 129         cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
 130             (GDC_CMD_BLT_DRAW << 16) | (2 + (height * step));
 131         cmd[1] = (dy << 16) | dx;
 132         cmd[2] = (height << 16) | width;
 133
 134         i = 0;
 135         line = ptr = image->data;
 136         bytes = image->width;
 137
 138         while (i < height) {
 139                 ptr = line;
 140                 for (j = 0; j < step; j++) {
 141                         cmd[3 + i * step + j] =
 142                             (((u32 *) (info->pseudo_palette))[*ptr]) & 0xffff;
 143                         ptr++;
 144                         cmd[3 + i * step + j] |=
 145                             ((((u32 *) (info->
 146                                         pseudo_palette))[*ptr]) & 0xffff) << 16;
 147                         ptr++;
 148                 }
 149
 150                 line += bytes;
 151                 i++;
 152         }
 153 }
 154
 155 /*
 156  * Fill in the cmd array /GDC FIFO commands/ to draw a 16bit image.
 157  * Make sure cmd has enough room!
 158  */
 159 static void mb86290fb_imageblit16(u32 *cmd, u16 step, u16 dx, u16 dy,
 160                                   u16 width, u16 height, u32 fgcolor,
 161                                   u32 bgcolor, const struct fb_image *image,
 162                                   struct fb_info *info)
 163 {
 164         int i;
 165         unsigned const char *line;
 166         u16 bytes;
 167
 168         i = 0;
 169         line = image->data;
 170         bytes = image->width << 1;
 171
 172         cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
 173             (GDC_CMD_BLT_DRAW << 16) | (2 + step * height);
 174         cmd[1] = (dy << 16) | dx;
 175         cmd[2] = (height << 16) | width;
 176
 177         while (i < height) {
 178                 memcpy(&cmd[3 + i * step], line, step);
 179                 line += bytes;
 180                 i++;
 181         }
 182 }
 183
 184 static void mb86290fb_imageblit(struct fb_info *info,
 185                                 const struct fb_image *image)
 186 {
 187         u32 *cmd = NULL;
 188         void (*cmdfn) (u32 *, u16, u16, u16, u16, u16, u32, u32,
 189                        const struct fb_image *, struct fb_info *) = NULL;
 190         u32 cmdlen;
 191         u32 fgcolor = 0, bgcolor = 0;
 192         u16 step;
 193
 194         u16 width = image->width, height = image->height;
 195         u16 dx = image->dx, dy = image->dy;
 196         int x2, y2, vxres, vyres;
 197
 198         x2 = image->dx + image->width;
 199         y2 = image->dy + image->height;
 200         vxres = info->var.xres_virtual;
 201         vyres = info->var.yres_virtual;
 202         x2 = min(x2, vxres);
 203         y2 = min(y2, vyres);
 204         width = x2 - dx;
 205         height = y2 - dy;
 206
 207         switch (image->depth) {
 208         case 1:
 209                 step = (width + 31) >> 5;
 210                 cmdlen = 9 + height * step;
 211                 cmdfn = mb86290fb_imageblit1;
 212                 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 213                     info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
 214                         fgcolor =
 215                             ((u32 *) (info->pseudo_palette))[image->fg_color];
 216                         bgcolor =
 217                             ((u32 *) (info->pseudo_palette))[image->bg_color];
 218                 } else {
 219                         fgcolor = image->fg_color;
 220                         bgcolor = image->bg_color;
 221                 }
 222
 223                 break;
 224
 225         case 8:
 226                 step = (width + 1) >> 1;
 227                 cmdlen = 3 + height * step;
 228                 cmdfn = mb86290fb_imageblit8;
 229                 break;
 230
 231         case 16:
 232                 step = (width + 1) >> 1;
 233                 cmdlen = 3 + height * step;
 234                 cmdfn = mb86290fb_imageblit16;
 235                 break;
 236
 237         default:
 238                 cfb_imageblit(info, image);
 239                 return;
 240         }
 241
 242         cmd = kmalloc_array(cmdlen, 4, GFP_DMA);
 243         if (!cmd)
 244                 return cfb_imageblit(info, image);
 245         cmdfn(cmd, step, dx, dy, width, height, fgcolor, bgcolor, image, info);
 246         mb862xxfb_write_fifo(cmdlen, cmd, info);
 247         kfree(cmd);
 248 }
 249
 250 static void mb86290fb_fillrect(struct fb_info *info,
 251                                const struct fb_fillrect *rect)
 252 {
 253
 254         u32 x2, y2, vxres, vyres, height, width, fg;
 255         u32 cmd[7];
 256
 257         vxres = info->var.xres_virtual;
 258         vyres = info->var.yres_virtual;
 259
 260         if (!rect->width || !rect->height || rect->dx > vxres
 261             || rect->dy > vyres)
 262                 return;
 263
 264         /* We could use hardware clipping but on many cards you get around
 265          * hardware clipping by writing to framebuffer directly. */
 266         x2 = rect->dx + rect->width;
 267         y2 = rect->dy + rect->height;
 268         x2 = min(x2, vxres);
 269         y2 = min(y2, vyres);
 270         width = x2 - rect->dx;
 271         height = y2 - rect->dy;
 272         if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 273             info->fix.visual == FB_VISUAL_DIRECTCOLOR)
 274                 fg = ((u32 *) (info->pseudo_palette))[rect->color];
 275         else
 276                 fg = rect->color;
 277
 278         switch (rect->rop) {
 279
 280         case ROP_XOR:
 281                 /* Set raster operation */
 282                 cmd[1] = (2 << 7) | (GDC_ROP_XOR << 9);
 283                 break;
 284
 285         case ROP_COPY:
 286                 /* Set raster operation */
 287                 cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
 288                 break;
 289
 290         }
 291
 292         cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
 293         /* cmd[1] set earlier */
 294         cmd[2] =
 295             (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
 296         cmd[3] = fg;
 297         cmd[4] = (GDC_TYPE_DRAWRECTP << 24) | (GDC_CMD_BLT_FILL << 16);
 298         cmd[5] = (rect->dy << 16) | (rect->dx);
 299         cmd[6] = (height << 16) | width;
 300
 301         mb862xxfb_write_fifo(7, cmd, info);
 302 }
 303
 304 void mb862xxfb_init_accel(struct fb_info *info, struct fb_ops *fbops, int xres)
 305 {
 306         struct mb862xxfb_par *par = info->par;
 307
 308         if (info->var.bits_per_pixel == 32) {
 309                 fbops->fb_fillrect = cfb_fillrect;
 310                 fbops->fb_copyarea = cfb_copyarea;
 311                 fbops->fb_imageblit = cfb_imageblit;
 312         } else {
 313                 outreg(disp, GC_L0EM, 3);
 314                 fbops->fb_fillrect = mb86290fb_fillrect;
 315                 fbops->fb_copyarea = mb86290fb_copyarea;
 316                 fbops->fb_imageblit = mb86290fb_imageblit;
 317         }
 318         outreg(draw, GDC_REG_DRAW_BASE, 0);
 319         outreg(draw, GDC_REG_MODE_MISC, 0x8000);
 320         outreg(draw, GDC_REG_X_RESOLUTION, xres);
 321
 322         info->flags |=
 323             FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
 324             FBINFO_HWACCEL_IMAGEBLIT;
 325         info->fix.accel = 0xff; /*FIXME: add right define */
 326 }
 327
 328 MODULE_LICENSE("GPL v2");