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  * $FreeBSD$
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/fbio.h>
  39
  40 #include "opt_platform.h"
  41
  42 #ifdef  FDT
  43 #include <dev/fdt/fdt_common.h>
  44 #include <dev/ofw/ofw_bus.h>
  45 #include <dev/ofw/ofw_bus_subr.h>
  46 #include <dev/ofw/ofw_pci.h>
  47 #include <machine/fdt.h>
  48 #endif
  49
  50 #include <dev/vt/vt.h>
  51 #include <dev/vt/hw/fb/vt_fb.h>
  52 #include <dev/vt/colors/vt_termcolors.h>
  53
  54 static vd_init_t vt_efb_init;
  55 static vd_probe_t vt_efb_probe;
  56
  57 static struct vt_driver vt_fb_early_driver = {
  58         .vd_name = "efb",
  59         .vd_probe = vt_efb_probe,
  60         .vd_init = vt_efb_init,
  61         .vd_blank = vt_fb_blank,
  62         .vd_bitbltchr = vt_fb_bitbltchr,
  63         .vd_priority = VD_PRIORITY_GENERIC,
  64 };
  65
  66 static struct fb_info local_info;
  67 VT_DRIVER_DECLARE(vt_efb, vt_fb_early_driver);
  68
  69 static void
  70 #ifdef  FDT
  71 vt_efb_initialize(struct fb_info *info, phandle_t node)
  72 #else
  73 vt_efb_initialize(struct fb_info *info)
  74 #endif
  75 {
  76 #ifdef  FDT
  77         char name[64];
  78         cell_t retval;
  79         ihandle_t ih;
  80         int i;
  81
  82         /* Open display device, thereby initializing it */
  83         memset(name, 0, sizeof(name));
  84         OF_package_to_path(node, name, sizeof(name));
  85         ih = OF_open(name);
  86 #endif
  87
  88         /*
  89          * Set up the color map
  90          */
  91         switch (info->fb_depth) {
  92         case 8:
  93                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  94                     0x7, 5, 0x7, 2, 0x3, 0);
  95                 break;
  96         case 15:
  97                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  98                     0x1f, 10, 0x1f, 5, 0x1f, 0);
  99                 break;
 100         case 16:
 101                 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
 102                     0x1f, 11, 0x3f, 5, 0x1f, 0);
 103                 break;
 104         case 24:
 105         case 32:
 106 #if BYTE_ORDER == BIG_ENDIAN
 107                 vt_generate_cons_palette(info->fb_cmap,
 108                     COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16);
 109 #else
 110                 vt_generate_cons_palette(info->fb_cmap,
 111                     COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
 112 #endif
 113 #ifdef  FDT
 114                 for (i = 0; i < 16; i++) {
 115                         OF_call_method("color!", ih, 4, 1,
 116                             (cell_t)((info->fb_cmap[i] >> 16) & 0xff),
 117                             (cell_t)((info->fb_cmap[i] >> 8) & 0xff),
 118                             (cell_t)((info->fb_cmap[i] >> 0) & 0xff),
 119                             (cell_t)i, &retval);
 120                 }
 121 #endif
 122                 break;
 123
 124         default:
 125                 panic("Unknown color space fb_depth %d", info->fb_depth);
 126                 break;
 127         }
 128 }
 129
 130 static phandle_t
 131 vt_efb_get_fbnode()
 132 {
 133         phandle_t chosen, node;
 134         ihandle_t stdout;
 135         char type[64];
 136
 137         chosen = OF_finddevice("/chosen");
 138         OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
 139         node = OF_instance_to_package(stdout);
 140         if (node != -1) {
 141                 /* The "/chosen/stdout" present. */
 142                 OF_getprop(node, "device_type", type, sizeof(type));
 143                 /* Check if it has "display" type. */
 144                 if (strcmp(type, "display") == 0)
 145                         return (node);
 146         }
 147         /* Try device with name "screen". */
 148         node = OF_finddevice("screen");
 149
 150         return (node);
 151 }
 152
 153 static int
 154 vt_efb_probe(struct vt_device *vd)
 155 {
 156         phandle_t node;
 157
 158         node = vt_efb_get_fbnode();
 159         if (node == -1)
 160                 return (CN_DEAD);
 161
 162         if ((OF_getproplen(node, "height") <= 0) ||
 163             (OF_getproplen(node, "width") <= 0) ||
 164             (OF_getproplen(node, "depth") <= 0) ||
 165             (OF_getproplen(node, "linebytes") <= 0))
 166                 return (CN_DEAD);
 167
 168         return (CN_INTERNAL);
 169 }
 170
 171 static int
 172 vt_efb_init(struct vt_device *vd)
 173 {
 174         struct ofw_pci_register pciaddrs[8];
 175         struct fb_info *info;
 176         int i, len, n_pciaddrs;
 177         phandle_t node;
 178
 179         if (vd->vd_softc == NULL)
 180                 vd->vd_softc = (void *)&local_info;
 181
 182         info = vd->vd_softc;
 183
 184         node = vt_efb_get_fbnode();
 185         if (node == -1)
 186                 return (CN_DEAD);
 187
 188 #define GET(name, var)                                                  \
 189         if (OF_getproplen(node, (name)) != sizeof(info->fb_##var))      \
 190                 return (CN_DEAD);                                       \
 191         OF_getencprop(node, (name), &info->fb_##var, sizeof(info->fb_##var)); \
 192         if (info->fb_##var == 0)                                        \
 193                 return (CN_DEAD);
 194
 195         GET("height", height)
 196         GET("width", width)
 197         GET("depth", depth)
 198         GET("linebytes", stride)
 199 #undef GET
 200
 201         info->fb_size = info->fb_height * info->fb_stride;
 202
 203         /*
 204          * Get the PCI addresses of the adapter, if present. The node may be the
 205          * child of the PCI device: in that case, try the parent for
 206          * the assigned-addresses property.
 207          */
 208         len = OF_getprop(node, "assigned-addresses", pciaddrs,
 209             sizeof(pciaddrs));
 210         if (len == -1) {
 211                 len = OF_getprop(OF_parent(node), "assigned-addresses",
 212                     pciaddrs, sizeof(pciaddrs));
 213         }
 214         if (len == -1)
 215                 len = 0;
 216         n_pciaddrs = len / sizeof(struct ofw_pci_register);
 217
 218         /*
 219          * Grab the physical address of the framebuffer, and then map it
 220          * into our memory space. If the MMU is not yet up, it will be
 221          * remapped for us when relocation turns on.
 222          */
 223         if (OF_getproplen(node, "address") == sizeof(info->fb_pbase)) {
 224                 /* XXX We assume #address-cells is 1 at this point. */
 225                 OF_getencprop(node, "address", &info->fb_pbase,
 226                     sizeof(info->fb_pbase));
 227
 228         #if defined(__powerpc__)
 229                 sc->sc_memt = &bs_be_tag;
 230                 bus_space_map(sc->sc_memt, info->fb_pbase, info->fb_size,
 231                     BUS_SPACE_MAP_PREFETCHABLE, &info->fb_vbase);
 232         #elif defined(__sparc64__)
 233                 OF_decode_addr(node, 0, &space, &phys);
 234                 sc->sc_memt = &vt_efb_memt[0];
 235                 info->addr = sparc64_fake_bustag(space, fb_phys, sc->sc_memt);
 236         #else
 237                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 238                     BUS_SPACE_MAP_PREFETCHABLE,
 239                     (bus_space_handle_t *)&info->fb_vbase);
 240         #endif
 241         } else {
 242                 /*
 243                  * Some IBM systems don't have an address property. Try to
 244                  * guess the framebuffer region from the assigned addresses.
 245                  * This is ugly, but there doesn't seem to be an alternative.
 246                  * Linux does the same thing.
 247                  */
 248
 249                 info->fb_pbase = n_pciaddrs;
 250                 for (i = 0; i < n_pciaddrs; i++) {
 251                         /* If it is too small, not the framebuffer */
 252                         if (pciaddrs[i].size_lo < info->fb_size)
 253                                 continue;
 254                         /* If it is not memory, it isn't either */
 255                         if (!(pciaddrs[i].phys_hi &
 256                             OFW_PCI_PHYS_HI_SPACE_MEM32))
 257                                 continue;
 258
 259                         /* This could be the framebuffer */
 260                         info->fb_pbase = i;
 261
 262                         /* If it is prefetchable, it certainly is */
 263                         if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE)
 264                                 break;
 265                 }
 266
 267                 if (info->fb_pbase == n_pciaddrs) /* No candidates found */
 268                         return (CN_DEAD);
 269
 270         #if defined(__powerpc__)
 271                 OF_decode_addr(node, info->fb_pbase, &sc->sc_memt,
 272                     &info->fb_vbase);
 273         #elif defined(__sparc64__)
 274                 OF_decode_addr(node, info->fb_pbase, &space, &info->fb_pbase);
 275                 sc->sc_memt = &vt_efb_memt[0];
 276                 info->fb_vbase = sparc64_fake_bustag(space, info->fb_pbase,
 277                     sc->sc_memt);
 278         #else
 279                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 280                     BUS_SPACE_MAP_PREFETCHABLE,
 281                     (bus_space_handle_t *)&info->fb_vbase);
 282         #endif
 283         }
 284
 285         /* blank full size */
 286         len = info->fb_size / 4;
 287         for (i = 0; i < len; i++) {
 288                 ((uint32_t *)info->fb_vbase)[i] = 0;
 289         }
 290
 291         /* Get pixel storage size. */
 292         info->fb_bpp = info->fb_stride / info->fb_width * 8;
 293
 294 #ifdef  FDT
 295         vt_efb_initialize(info, node);
 296 #else
 297         vt_efb_initialize(info);
 298 #endif
 299         vt_fb_init(vd);
 300
 301         return (CN_INTERNAL);
 302 }