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 #endif
  48
  49 #include <dev/vt/vt.h>
  50 #include <dev/vt/hw/fb/vt_fb.h>
  51 #include <dev/vt/colors/vt_termcolors.h>
  52
  53 static vd_init_t vt_efb_init;
  54
  55 static struct vt_driver vt_fb_early_driver = {
  56         .vd_init = vt_efb_init,
  57         .vd_blank = vt_fb_blank,
  58         .vd_bitbltchr = vt_fb_bitbltchr,
  59         .vd_priority = VD_PRIORITY_GENERIC,
  60 };
  61
  62 static struct fb_info info;
  63 VT_CONSDEV_DECLARE(vt_fb_early_driver,
  64     MAX(80, PIXEL_WIDTH(VT_FB_DEFAULT_WIDTH)),
  65     MAX(25, PIXEL_HEIGHT(VT_FB_DEFAULT_HEIGHT)), &info);
  66
  67 static void
  68 #ifdef  FDT
  69 vt_efb_initialize(struct fb_info *info, phandle_t node)
  70 #else
  71 vt_efb_initialize(struct fb_info *info)
  72 #endif
  73 {
  74 #ifdef  FDT
  75         char name[64];
  76         cell_t retval;
  77         ihandle_t ih;
  78         int i;
  79
  80         /* Open display device, thereby initializing it */
  81         memset(name, 0, sizeof(name));
  82         OF_package_to_path(node, name, sizeof(name));
  83         ih = OF_open(name);
  84 #endif
  85
  86         /*
  87          * Set up the color map
  88          */
  89         switch (info->fb_depth) {
  90         case 8:
  91                 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  92                     0x7, 5, 0x7, 2, 0x3, 0);
  93                 break;
  94         case 15:
  95                 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
  96                     0x1f, 10, 0x1f, 5, 0x1f, 0);
  97                 break;
  98         case 16:
  99                 vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
 100                     0x1f, 11, 0x3f, 5, 0x1f, 0);
 101                 break;
 102         case 24:
 103         case 32:
 104 #if BYTE_ORDER == BIG_ENDIAN
 105                 vt_generate_vga_palette(info->fb_cmap,
 106                     COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0);
 107 #else
 108                 vt_generate_vga_palette(info->fb_cmap,
 109                     COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16);
 110 #endif
 111 #ifdef  FDT
 112                 for (i = 0; i < 16; i++) {
 113                         OF_call_method("color!", ih, 4, 1,
 114                             (cell_t)((info->fb_cmap[i] >> 16) & 0xff),
 115                             (cell_t)((info->fb_cmap[i] >> 8) & 0xff),
 116                             (cell_t)((info->fb_cmap[i] >> 0) & 0xff),
 117                             (cell_t)i, &retval);
 118                 }
 119 #endif
 120                 break;
 121
 122         default:
 123                 panic("Unknown color space fb_depth %d", info->fb_depth);
 124                 break;
 125         }
 126 }
 127
 128 static int
 129 vt_efb_init(struct vt_device *vd)
 130 {
 131         struct ofw_pci_register pciaddrs[8];
 132         struct fb_info *info;
 133         int i, len, n_pciaddrs;
 134         phandle_t chosen, node;
 135         ihandle_t stdout;
 136         char type[64];
 137
 138         info = vd->vd_softc;
 139
 140         chosen = OF_finddevice("/chosen");
 141         OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
 142         node = OF_instance_to_package(stdout);
 143         if (node == -1) {
 144                 /*
 145                  * The "/chosen/stdout" does not exist try
 146                  * using "screen" directly.
 147                  */
 148                 node = OF_finddevice("screen");
 149         }
 150         OF_getprop(node, "device_type", type, sizeof(type));
 151         if (strcmp(type, "display") != 0)
 152                 return (CN_DEAD);
 153
 154 #define GET(name, var)                                                  \
 155         if (OF_getproplen(node, (name)) != sizeof(info->fb_##var))      \
 156                 return (CN_DEAD);                                       \
 157         OF_getencprop(node, (name), &info->fb_##var, sizeof(info->fb_##var)); \
 158         if (info->fb_##var == 0)                                        \
 159                 return (CN_DEAD);
 160
 161         GET("height", height)
 162         GET("width", width)
 163         GET("depth", depth)
 164         GET("linebytes", stride)
 165 #undef GET
 166
 167         info->fb_size = info->fb_height * info->fb_stride;
 168
 169         /*
 170          * Get the PCI addresses of the adapter, if present. The node may be the
 171          * child of the PCI device: in that case, try the parent for
 172          * the assigned-addresses property.
 173          */
 174         len = OF_getprop(node, "assigned-addresses", pciaddrs,
 175             sizeof(pciaddrs));
 176         if (len == -1) {
 177                 len = OF_getprop(OF_parent(node), "assigned-addresses",
 178                     pciaddrs, sizeof(pciaddrs));
 179         }
 180         if (len == -1)
 181                 len = 0;
 182         n_pciaddrs = len / sizeof(struct ofw_pci_register);
 183
 184         /*
 185          * Grab the physical address of the framebuffer, and then map it
 186          * into our memory space. If the MMU is not yet up, it will be
 187          * remapped for us when relocation turns on.
 188          */
 189         if (OF_getproplen(node, "address") == sizeof(info->fb_pbase)) {
 190                 /* XXX We assume #address-cells is 1 at this point. */
 191                 OF_getencprop(node, "address", &info->fb_pbase,
 192                     sizeof(info->fb_pbase));
 193
 194         #if defined(__powerpc__)
 195                 sc->sc_memt = &bs_be_tag;
 196                 bus_space_map(sc->sc_memt, info->fb_pbase, info->fb_size,
 197                     BUS_SPACE_MAP_PREFETCHABLE, &info->fb_vbase);
 198         #elif defined(__sparc64__)
 199                 OF_decode_addr(node, 0, &space, &phys);
 200                 sc->sc_memt = &vt_efb_memt[0];
 201                 info->addr = sparc64_fake_bustag(space, fb_phys, sc->sc_memt);
 202         #else
 203                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 204                     BUS_SPACE_MAP_PREFETCHABLE,
 205                     (bus_space_handle_t *)&info->fb_vbase);
 206         #endif
 207         } else {
 208                 /*
 209                  * Some IBM systems don't have an address property. Try to
 210                  * guess the framebuffer region from the assigned addresses.
 211                  * This is ugly, but there doesn't seem to be an alternative.
 212                  * Linux does the same thing.
 213                  */
 214
 215                 info->fb_pbase = n_pciaddrs;
 216                 for (i = 0; i < n_pciaddrs; i++) {
 217                         /* If it is too small, not the framebuffer */
 218                         if (pciaddrs[i].size_lo < info->fb_size)
 219                                 continue;
 220                         /* If it is not memory, it isn't either */
 221                         if (!(pciaddrs[i].phys_hi &
 222                             OFW_PCI_PHYS_HI_SPACE_MEM32))
 223                                 continue;
 224
 225                         /* This could be the framebuffer */
 226                         info->fb_pbase = i;
 227
 228                         /* If it is prefetchable, it certainly is */
 229                         if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE)
 230                                 break;
 231                 }
 232
 233                 if (info->fb_pbase == n_pciaddrs) /* No candidates found */
 234                         return (CN_DEAD);
 235
 236         #if defined(__powerpc__)
 237                 OF_decode_addr(node, info->fb_pbase, &sc->sc_memt,
 238                     &info->fb_vbase);
 239         #elif defined(__sparc64__)
 240                 OF_decode_addr(node, info->fb_pbase, &space, &info->fb_pbase);
 241                 sc->sc_memt = &vt_efb_memt[0];
 242                 info->fb_vbase = sparc64_fake_bustag(space, info->fb_pbase,
 243                     sc->sc_memt);
 244         #else
 245                 bus_space_map(fdtbus_bs_tag, info->fb_pbase, info->fb_size,
 246                     BUS_SPACE_MAP_PREFETCHABLE,
 247                     (bus_space_handle_t *)&info->fb_vbase);
 248         #endif
 249         }
 250
 251
 252         /* blank full size */
 253         len = info->fb_size / 4;
 254         for (i = 0; i < len; i++) {
 255                 ((uint32_t *)info->fb_vbase)[i] = 0;
 256         }
 257
 258         /* Get pixel storage size. */
 259         info->fb_bpp = info->fb_stride / info->fb_width * 8;
 260
 261         /*
 262          * Early FB driver work with static window buffer 80x25, so reduce
 263          * size to 640x480.
 264          */
 265         info->fb_width = VT_FB_DEFAULT_WIDTH;
 266         info->fb_height = VT_FB_DEFAULT_HEIGHT;
 267
 268 #ifdef  FDT
 269         vt_efb_initialize(info, node);
 270 #else
 271         vt_efb_initialize(info);
 272 #endif
 273         fb_probe(info);
 274         vt_fb_init(vd);
 275
 276
 277         return (CN_INTERNAL);
 278 }