sys/dev/vt/hw/fb/vt_early_fb.c

   1 /*-
   2  * Copyright (c) 2013 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Aleksandr Rybalko under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/kernel.h>
  36 #include <sys/fbio.h>
  37
  38 #include "opt_platform.h"
  39
  40 #ifdef  FDT
  41 #include <dev/fdt/fdt_common.h>
  42 #include <dev/ofw/ofw_bus.h>
  43 #include <dev/ofw/ofw_bus_subr.h>
  44 #include <dev/ofw/ofw_pci.h>
  45 #include <machine/fdt.h>
  46 #endif
  47
  48 #include <dev/vt/vt.h>
  49 #include <dev/vt/hw/fb/vt_fb.h>
  50 #include <dev/vt/colors/vt_termcolors.h>
  51
  52 static vd_init_t vt_efb_init;
  53 static vd_probe_t vt_efb_probe;
  54
  55 static struct vt_driver vt_fb_early_driver = {
  56         .vd_name = "efb",
  57         .vd_probe = vt_efb_probe,
  58         .vd_init = vt_efb_init,
  59         .vd_blank = vt_fb_blank,
  60         .vd_bitblt_text = vt_fb_bitblt_text,
  61         .vd_bitblt_bmp = vt_fb_bitblt_bitmap,
  62         .vd_drawrect = vt_fb_drawrect,
  63         .vd_setpixel = vt_fb_setpixel,
  64         .vd_priority = VD_PRIORITY_GENERIC,
  65 };
  66
  67 static struct fb_info local_info;
  68 VT_DRIVER_DECLARE(vt_efb, vt_fb_early_driver);
  69
  70 static void
  71 #ifdef  FDT
  72 vt_efb_initialize(struct fb_info *info, phandle_t node)
  73 #else
  74 vt_efb_initialize(struct fb_info *info)
  75 #endif
  76 {
  77 #ifdef  FDT
  78         char name[64];
  79         cell_t retval;
  80         ihandle_t ih;
  81         int i;
  82
  83         /* Open display device, thereby initializing it */
  84         memset(name, 0, sizeof(name));
  85         OF_package_to_path(node, name, sizeof(name));
  86         ih = OF_open(name);
  87 #endif
  88
  89         /*
  90          * Set up the color map
  91          */
  92         switch (info->fb_depth) {
  93         case 8:
  94                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  95                     0x7, 5, 0x7, 2, 0x3, 0);
  96                 break;
  97         case 15:
  98                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  99                     0x1f, 10, 0x1f, 5, 0x1f, 0);
 100                 break;
 101         case 16:
 102                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
 103                     0x1f, 11, 0x3f, 5, 0x1f, 0);
 104                 break;
 105         case 24:
 106         case 32:
 107 #if BYTE_ORDER == BIG_ENDIAN
 108                 vt_generate_cons_palette(info->fb_cmap,
 109                     COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16);
 110 #else
 111                 vt_generate_cons_palette(info->fb_cmap,
 112                     COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
 113 #endif
 114 #ifdef  FDT
 115                 for (i = 0; i < 16; i++) {
 116                         OF_call_method("color!", ih, 4, 1,
 117                             (cell_t)((info->fb_cmap[i] >> 16) & 0xff),
 118                             (cell_t)((info->fb_cmap[i] >> 8) & 0xff),
 119                             (cell_t)((info->fb_cmap[i] >> 0) & 0xff),
 120                             (cell_t)i, &retval);
 121                 }
 122 #endif
 123                 break;
 124
 125         default:
 126                 panic("Unknown color space fb_depth %d", info->fb_depth);
 127                 break;
 128         }
 129 }
 130
 131 static phandle_t
 132 vt_efb_get_fbnode()
 133 {
 134         phandle_t chosen, node;
 135         ihandle_t stdout;
 136         char type[64];
 137
 138         chosen = OF_finddevice("/chosen");
 139         OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
 140         node = OF_instance_to_package(stdout);
 141         if (node != -1) {
 142                 /* The "/chosen/stdout" present. */
 143                 OF_getprop(node, "device_type", type, sizeof(type));
 144                 /* Check if it has "display" type. */
 145                 if (strcmp(type, "display") == 0)
 146                         return (node);
 147         }
 148         /* Try device with name "screen". */
 149         node = OF_finddevice("screen");
 150
 151         return (node);
 152 }
 153
 154 static int
 155 vt_efb_probe(struct vt_device *vd)
 156 {
 157         phandle_t node;
 158
 159         node = vt_efb_get_fbnode();
 160         if (node == -1)
 161                 return (CN_DEAD);
 162
 163         if ((OF_getproplen(node, "height") <= 0) ||
 164             (OF_getproplen(node, "width") <= 0) ||
 165             (OF_getproplen(node, "depth") <= 0) ||
 166             (OF_getproplen(node, "linebytes") <= 0))
 167                 return (CN_DEAD);
 168
 169         return (CN_INTERNAL);
 170 }
 171
 172 static int
 173 vt_efb_init(struct vt_device *vd)
 174 {
 175         struct ofw_pci_register pciaddrs[8];
 176         struct fb_info *info;
 177         int i, len, n_pciaddrs;
 178         phandle_t node;
 179
 180         if (vd->vd_softc == NULL)
 181                 vd->vd_softc = (void *)&local_info;
 182
 183         info = vd->vd_softc;
 184
 185         node = vt_efb_get_fbnode();
 186         if (node == -1)
 187                 return (CN_DEAD);
 188
 189 #define GET(name, var)                                                  \
 190         if (OF_getproplen(node, (name)) != sizeof(info->fb_##var))      \
 191                 return (CN_DEAD);                                       \
 192         OF_getencprop(node, (name), &info->fb_##var, sizeof(info->fb_##var)); \
 193         if (info->fb_##var == 0)                                        \
 194                 return (CN_DEAD);
 195
 196         GET("height", height)
 197         GET("width", width)
 198         GET("depth", depth)
 199         GET("linebytes", stride)
 200 #undef GET
 201
 202         info->fb_size = info->fb_height * info->fb_stride;
 203
 204         /*
 205          * Get the PCI addresses of the adapter, if present. The node may be the
 206          * child of the PCI device: in that case, try the parent for
 207          * the assigned-addresses property.
 208          */
 209         len = OF_getprop(node, "assigned-addresses", pciaddrs,
 210             sizeof(pciaddrs));
 211         if (len == -1) {
 212                 len = OF_getprop(OF_parent(node), "assigned-addresses",
 213                     pciaddrs, sizeof(pciaddrs));
 214         }
 215         if (len == -1)
 216                 len = 0;
 217         n_pciaddrs = len / sizeof(struct ofw_pci_register);
 218
 219         /*
 220          * Grab the physical address of the framebuffer, and then map it
 221          * into our memory space. If the MMU is not yet up, it will be
 222          * remapped for us when relocation turns on.
 223          */
 224         if (OF_getproplen(node, "address") == sizeof(info->fb_pbase)) {
 225                 /* XXX We assume #address-cells is 1 at this point. */
 226                 OF_getencprop(node, "address", &info->fb_pbase,
 227                     sizeof(info->fb_pbase));
 228
 229         #if defined(__powerpc__)
 230                 sc->sc_memt = &bs_be_tag;
 231                 bus_space_map(sc->sc_memt, info->fb_pbase, info->fb_size,
 232                     BUS_SPACE_MAP_PREFETCHABLE, &info->fb_vbase);
 233         #elif defined(__sparc64__)
 234                 OF_decode_addr(node, 0, &space, &phys);
 235                 sc->sc_memt = &vt_efb_memt[0];
 236                 info->addr = sparc64_fake_bustag(space, fb_phys, sc->sc_memt);
 237         #else
 238                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 239                     BUS_SPACE_MAP_PREFETCHABLE,
 240                     (bus_space_handle_t *)&info->fb_vbase);
 241         #endif
 242         } else {
 243                 /*
 244                  * Some IBM systems don't have an address property. Try to
 245                  * guess the framebuffer region from the assigned addresses.
 246                  * This is ugly, but there doesn't seem to be an alternative.
 247                  * Linux does the same thing.
 248                  */
 249
 250                 info->fb_pbase = n_pciaddrs;
 251                 for (i = 0; i < n_pciaddrs; i++) {
 252                         /* If it is too small, not the framebuffer */
 253                         if (pciaddrs[i].size_lo < info->fb_size)
 254                                 continue;
 255                         /* If it is not memory, it isn't either */
 256                         if (!(pciaddrs[i].phys_hi &
 257                             OFW_PCI_PHYS_HI_SPACE_MEM32))
 258                                 continue;
 259
 260                         /* This could be the framebuffer */
 261                         info->fb_pbase = i;
 262
 263                         /* If it is prefetchable, it certainly is */
 264                         if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE)
 265                                 break;
 266                 }
 267
 268                 if (info->fb_pbase == n_pciaddrs) /* No candidates found */
 269                         return (CN_DEAD);
 270
 271         #if defined(__powerpc__)
 272                 OF_decode_addr(node, info->fb_pbase, &sc->sc_memt,
 273                     &info->fb_vbase);
 274         #elif defined(__sparc64__)
 275                 OF_decode_addr(node, info->fb_pbase, &space, &info->fb_pbase);
 276                 sc->sc_memt = &vt_efb_memt[0];
 277                 info->fb_vbase = sparc64_fake_bustag(space, info->fb_pbase,
 278                     sc->sc_memt);
 279         #else
 280                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 281                     BUS_SPACE_MAP_PREFETCHABLE,
 282                     (bus_space_handle_t *)&info->fb_vbase);
 283         #endif
 284         }
 285
 286         /* blank full size */
 287         len = info->fb_size / 4;
 288         for (i = 0; i < len; i++) {
 289                 ((uint32_t *)info->fb_vbase)[i] = 0;
 290         }
 291
 292         /* Get pixel storage size. */
 293         info->fb_bpp = info->fb_stride / info->fb_width * 8;
 294
 295 #ifdef  FDT
 296         vt_efb_initialize(info, node);
 297 #else
 298         vt_efb_initialize(info);
 299 #endif
 300         vt_fb_init(vd);
 301
 302         return (CN_INTERNAL);
 303 }