sys/arm/broadcom/bcm2835/bcm2835_fbd.c

   1 /*-
   2  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
   3  * Copyright (c) 2012, 2013 The FreeBSD Foundation
   4  * All rights reserved.
   5  *
   6  * Portions of this software were developed by Oleksandr Rybalko
   7  * under sponsorship from the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  */
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/bio.h>
  37 #include <sys/bus.h>
  38 #include <sys/fbio.h>
  39 #include <sys/kernel.h>
  40 #include <sys/malloc.h>
  41 #include <sys/module.h>
  42
  43 #include <vm/vm.h>
  44 #include <vm/pmap.h>
  45
  46 #include <dev/fdt/fdt_common.h>
  47 #include <dev/ofw/ofw_bus.h>
  48 #include <dev/ofw/ofw_bus_subr.h>
  49
  50 #include <dev/fb/fbreg.h>
  51 #include <dev/vt/vt.h>
  52 #include <dev/vt/colors/vt_termcolors.h>
  53
  54 #include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
  55
  56 #include "fb_if.h"
  57 #include "mbox_if.h"
  58
  59 #define FB_DEPTH                24
  60
  61 struct bcmsc_softc {
  62         struct fb_info          *info;
  63 };
  64
  65 static int bcm_fb_probe(device_t);
  66 static int bcm_fb_attach(device_t);
  67
  68 static int
  69 bcm_fb_probe(device_t dev)
  70 {
  71         if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb"))
  72                 return (ENXIO);
  73
  74         device_set_desc(dev, "BCM2835 VT framebuffer driver");
  75
  76         return (BUS_PROBE_DEFAULT);
  77 }
  78
  79 static int
  80 bcm_fb_attach(device_t dev)
  81 {
  82         char bootargs[2048], *n, *p, *v;
  83         device_t fbd;
  84         int fbswap;
  85         phandle_t chosen;
  86         struct bcm2835_fb_config fb;
  87         struct bcmsc_softc *sc;
  88         struct fb_info *info;
  89
  90         sc = device_get_softc(dev);
  91         memset(&fb, 0, sizeof(fb));
  92         if (bcm2835_mbox_fb_get_w_h(dev, &fb) != 0)
  93                 return (ENXIO);
  94         fb.bpp = FB_DEPTH;
  95         if (bcm2835_mbox_fb_init(dev, &fb) != 0)
  96                 return (ENXIO);
  97
  98         info = malloc(sizeof(struct fb_info), M_DEVBUF, M_WAITOK | M_ZERO);
  99         info->fb_name = device_get_nameunit(dev);
 100         info->fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size);
 101         info->fb_pbase = fb.base;
 102         info->fb_size = fb.size;
 103         info->fb_bpp = info->fb_depth = fb.bpp;
 104         info->fb_stride = fb.pitch;
 105         info->fb_width = fb.xres;
 106         info->fb_height = fb.yres;
 107         sc->info = info;
 108
 109         /* Newer firmware versions needs an inverted color palette. */
 110         fbswap = 0;
 111         chosen = OF_finddevice("/chosen");
 112         if (chosen != 0 &&
 113             OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) {
 114                 p = bootargs;
 115                 while ((v = strsep(&p, " ")) != NULL) {
 116                         if (*v == '\0')
 117                                 continue;
 118                         n = strsep(&v, "=");
 119                         if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL)
 120                                 if (*v == '1')
 121                                         fbswap = 1;
 122                 }
 123         }
 124         if (fbswap) {
 125                 switch (info->fb_bpp) {
 126                 case 24:
 127                         vt_generate_cons_palette(info->fb_cmap,
 128                             COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
 129                         info->fb_cmsize = 16;
 130                         break;
 131                 case 32:
 132                         vt_generate_cons_palette(info->fb_cmap,
 133                             COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0);
 134                         info->fb_cmsize = 16;
 135                         break;
 136                 }
 137         }
 138
 139         fbd = device_add_child(dev, "fbd", device_get_unit(dev));
 140         if (fbd == NULL) {
 141                 device_printf(dev, "Failed to add fbd child\n");
 142                 free(info, M_DEVBUF);
 143                 return (ENXIO);
 144         } else if (device_probe_and_attach(fbd) != 0) {
 145                 device_printf(dev, "Failed to attach fbd device\n");
 146                 device_delete_child(dev, fbd);
 147                 free(info, M_DEVBUF);
 148                 return (ENXIO);
 149         }
 150
 151         device_printf(dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres,
 152             fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp);
 153         device_printf(dev,
 154             "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n",
 155             fbswap, fb.pitch, fb.base, fb.size);
 156
 157         return (0);
 158 }
 159
 160 static struct fb_info *
 161 bcm_fb_helper_getinfo(device_t dev)
 162 {
 163         struct bcmsc_softc *sc;
 164
 165         sc = device_get_softc(dev);
 166
 167         return (sc->info);
 168 }
 169
 170 static device_method_t bcm_fb_methods[] = {
 171         /* Device interface */
 172         DEVMETHOD(device_probe,         bcm_fb_probe),
 173         DEVMETHOD(device_attach,        bcm_fb_attach),
 174
 175         /* Framebuffer service methods */
 176         DEVMETHOD(fb_getinfo,           bcm_fb_helper_getinfo),
 177
 178         DEVMETHOD_END
 179 };
 180
 181 static devclass_t bcm_fb_devclass;
 182
 183 static driver_t bcm_fb_driver = {
 184         "fb",
 185         bcm_fb_methods,
 186         sizeof(struct bcmsc_softc),
 187 };
 188
 189 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);