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         int                             fbswap;
  64         struct bcm2835_fb_config        fb;
  65         device_t                        dev;
  66 };
  67
  68 static int bcm_fb_probe(device_t);
  69 static int bcm_fb_attach(device_t);
  70
  71 static int
  72 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb)
  73 {
  74         int err;
  75
  76         err = 0;
  77
  78         memset(fb, 0, sizeof(*fb));
  79         if (bcm2835_mbox_fb_get_w_h(fb) != 0)
  80                 return (ENXIO);
  81         fb->bpp = FB_DEPTH;
  82
  83         if ((err = bcm2835_mbox_fb_init(fb)) != 0) {
  84                 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err);
  85                 return (ENXIO);
  86         }
  87
  88         return (0);
  89 }
  90
  91 static int
  92 bcm_fb_setup_fbd(struct bcmsc_softc *sc)
  93 {
  94         struct bcm2835_fb_config fb;
  95         device_t fbd;
  96         int err;
  97
  98         err = bcm_fb_init(sc, &fb);
  99         if (err)
 100                 return (err);
 101
 102         memset(&sc->info, 0, sizeof(sc->info));
 103         sc->info.fb_name = device_get_nameunit(sc->dev);
 104
 105         sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size);
 106         sc->info.fb_pbase = fb.base;
 107         sc->info.fb_size = fb.size;
 108         sc->info.fb_bpp = sc->info.fb_depth = fb.bpp;
 109         sc->info.fb_stride = fb.pitch;
 110         sc->info.fb_width = fb.xres;
 111         sc->info.fb_height = fb.yres;
 112
 113         if (sc->fbswap) {
 114                 switch (sc->info.fb_bpp) {
 115                 case 24:
 116                         vt_generate_cons_palette(sc->info.fb_cmap,
 117                             COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
 118                         sc->info.fb_cmsize = 16;
 119                         break;
 120                 case 32:
 121                         vt_generate_cons_palette(sc->info.fb_cmap,
 122                             COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0);
 123                         sc->info.fb_cmsize = 16;
 124                         break;
 125                 }
 126         }
 127
 128         fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev));
 129         if (fbd == NULL) {
 130                 device_printf(sc->dev, "Failed to add fbd child\n");
 131                 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
 132                 return (ENXIO);
 133         } else if (device_probe_and_attach(fbd) != 0) {
 134                 device_printf(sc->dev, "Failed to attach fbd device\n");
 135                 device_delete_child(sc->dev, fbd);
 136                 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
 137                 return (ENXIO);
 138         }
 139
 140         device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres,
 141             fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp);
 142         device_printf(sc->dev,
 143             "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n",
 144             sc->fbswap, fb.pitch, fb.base, fb.size);
 145
 146         return (0);
 147 }
 148
 149 static int
 150 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS)
 151 {
 152         struct bcmsc_softc *sc = arg1;
 153         struct bcm2835_fb_config fb;
 154         int val;
 155         int err;
 156
 157         val = 0;
 158         err = sysctl_handle_int(oidp, &val, 0, req);
 159         if (err || !req->newptr) /* error || read request */
 160                 return (err);
 161
 162         bcm_fb_init(sc, &fb);
 163
 164         return (0);
 165 }
 166
 167 static void
 168 bcm_fb_sysctl_init(struct bcmsc_softc *sc)
 169 {
 170         struct sysctl_ctx_list *ctx;
 171         struct sysctl_oid *tree_node;
 172         struct sysctl_oid_list *tree;
 173
 174         /*
 175          * Add system sysctl tree/handlers.
 176          */
 177         ctx = device_get_sysctl_ctx(sc->dev);
 178         tree_node = device_get_sysctl_tree(sc->dev);
 179         tree = SYSCTL_CHILDREN(tree_node);
 180         SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync",
 181             CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc),
 182             bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC");
 183 }
 184
 185 static int
 186 bcm_fb_probe(device_t dev)
 187 {
 188         if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb"))
 189                 return (ENXIO);
 190
 191         device_set_desc(dev, "BCM2835 VT framebuffer driver");
 192
 193         return (BUS_PROBE_DEFAULT);
 194 }
 195
 196 static int
 197 bcm_fb_attach(device_t dev)
 198 {
 199         char bootargs[2048], *n, *p, *v;
 200         int err;
 201         phandle_t chosen;
 202         struct bcmsc_softc *sc;
 203
 204         sc = device_get_softc(dev);
 205         sc->dev = dev;
 206
 207         /* Newer firmware versions needs an inverted color palette. */
 208         sc->fbswap = 0;
 209         chosen = OF_finddevice("/chosen");
 210         if (chosen != 0 &&
 211             OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) {
 212                 p = bootargs;
 213                 while ((v = strsep(&p, " ")) != NULL) {
 214                         if (*v == '\0')
 215                                 continue;
 216                         n = strsep(&v, "=");
 217                         if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL)
 218                                 if (*v == '1')
 219                                         sc->fbswap = 1;
 220                 }
 221         }
 222
 223         bcm_fb_sysctl_init(sc);
 224
 225         err = bcm_fb_setup_fbd(sc);
 226         if (err)
 227                 return (err);
 228
 229         return (0);
 230 }
 231
 232 static struct fb_info *
 233 bcm_fb_helper_getinfo(device_t dev)
 234 {
 235         struct bcmsc_softc *sc;
 236
 237         sc = device_get_softc(dev);
 238
 239         return (&sc->info);
 240 }
 241
 242 static device_method_t bcm_fb_methods[] = {
 243         /* Device interface */
 244         DEVMETHOD(device_probe,         bcm_fb_probe),
 245         DEVMETHOD(device_attach,        bcm_fb_attach),
 246
 247         /* Framebuffer service methods */
 248         DEVMETHOD(fb_getinfo,           bcm_fb_helper_getinfo),
 249
 250         DEVMETHOD_END
 251 };
 252
 253 static devclass_t bcm_fb_devclass;
 254
 255 static driver_t bcm_fb_driver = {
 256         "fb",
 257         bcm_fb_methods,
 258         sizeof(struct bcmsc_softc),
 259 };
 260
 261 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);