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 struct ofw_compat_data compat_data[] = {
  69         {"broadcom,bcm2835-fb",         1},
  70         {"brcm,bcm2708-fb",             1},
  71         {NULL,                          0}
  72 };
  73
  74 static int bcm_fb_probe(device_t);
  75 static int bcm_fb_attach(device_t);
  76
  77 static int
  78 bcm_fb_init(struct bcmsc_softc *sc, struct bcm2835_fb_config *fb)
  79 {
  80         int err;
  81
  82         err = 0;
  83
  84         memset(fb, 0, sizeof(*fb));
  85         if (bcm2835_mbox_fb_get_w_h(fb) != 0)
  86                 return (ENXIO);
  87         fb->bpp = FB_DEPTH;
  88
  89         fb->vxres = fb->xres;
  90         fb->vyres = fb->yres;
  91         fb->xoffset = fb->yoffset = 0;
  92
  93         if ((err = bcm2835_mbox_fb_init(fb)) != 0) {
  94                 device_printf(sc->dev, "bcm2835_mbox_fb_init failed, err=%d\n", err);
  95                 return (ENXIO);
  96         }
  97
  98         return (0);
  99 }
 100
 101 static int
 102 bcm_fb_setup_fbd(struct bcmsc_softc *sc)
 103 {
 104         struct bcm2835_fb_config fb;
 105         device_t fbd;
 106         int err;
 107
 108         err = bcm_fb_init(sc, &fb);
 109         if (err)
 110                 return (err);
 111
 112         memset(&sc->info, 0, sizeof(sc->info));
 113         sc->info.fb_name = device_get_nameunit(sc->dev);
 114
 115         sc->info.fb_vbase = (intptr_t)pmap_mapdev(fb.base, fb.size);
 116         sc->info.fb_pbase = fb.base;
 117         sc->info.fb_size = fb.size;
 118         sc->info.fb_bpp = sc->info.fb_depth = fb.bpp;
 119         sc->info.fb_stride = fb.pitch;
 120         sc->info.fb_width = fb.xres;
 121         sc->info.fb_height = fb.yres;
 122 #ifdef VM_MEMATTR_WRITE_COMBINING
 123         sc->info.fb_flags = FB_FLAG_MEMATTR;
 124         sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING;
 125 #endif
 126
 127         if (sc->fbswap) {
 128                 switch (sc->info.fb_bpp) {
 129                 case 24:
 130                         vt_generate_cons_palette(sc->info.fb_cmap,
 131                             COLOR_FORMAT_RGB, 0xff, 0, 0xff, 8, 0xff, 16);
 132                         sc->info.fb_cmsize = 16;
 133                         break;
 134                 case 32:
 135                         vt_generate_cons_palette(sc->info.fb_cmap,
 136                             COLOR_FORMAT_RGB, 0xff, 16, 0xff, 8, 0xff, 0);
 137                         sc->info.fb_cmsize = 16;
 138                         break;
 139                 }
 140         }
 141
 142         fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev));
 143         if (fbd == NULL) {
 144                 device_printf(sc->dev, "Failed to add fbd child\n");
 145                 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
 146                 return (ENXIO);
 147         } else if (device_probe_and_attach(fbd) != 0) {
 148                 device_printf(sc->dev, "Failed to attach fbd device\n");
 149                 device_delete_child(sc->dev, fbd);
 150                 pmap_unmapdev(sc->info.fb_vbase, sc->info.fb_size);
 151                 return (ENXIO);
 152         }
 153
 154         device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", fb.xres, fb.yres,
 155             fb.vxres, fb.vyres, fb.xoffset, fb.yoffset, fb.bpp);
 156         device_printf(sc->dev,
 157             "fbswap: %d, pitch %d, base 0x%08x, screen_size %d\n",
 158             sc->fbswap, fb.pitch, fb.base, fb.size);
 159
 160         return (0);
 161 }
 162
 163 static int
 164 bcm_fb_resync_sysctl(SYSCTL_HANDLER_ARGS)
 165 {
 166         struct bcmsc_softc *sc = arg1;
 167         struct bcm2835_fb_config fb;
 168         int val;
 169         int err;
 170
 171         val = 0;
 172         err = sysctl_handle_int(oidp, &val, 0, req);
 173         if (err || !req->newptr) /* error || read request */
 174                 return (err);
 175
 176         bcm_fb_init(sc, &fb);
 177
 178         return (0);
 179 }
 180
 181 static void
 182 bcm_fb_sysctl_init(struct bcmsc_softc *sc)
 183 {
 184         struct sysctl_ctx_list *ctx;
 185         struct sysctl_oid *tree_node;
 186         struct sysctl_oid_list *tree;
 187
 188         /*
 189          * Add system sysctl tree/handlers.
 190          */
 191         ctx = device_get_sysctl_ctx(sc->dev);
 192         tree_node = device_get_sysctl_tree(sc->dev);
 193         tree = SYSCTL_CHILDREN(tree_node);
 194         SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resync",
 195             CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc),
 196             bcm_fb_resync_sysctl, "IU", "Set to resync framebuffer with VC");
 197 }
 198
 199 static int
 200 bcm_fb_probe(device_t dev)
 201 {
 202
 203         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
 204                 return (ENXIO);
 205
 206         device_set_desc(dev, "BCM2835 VT framebuffer driver");
 207
 208         return (BUS_PROBE_DEFAULT);
 209 }
 210
 211 static int
 212 bcm_fb_attach(device_t dev)
 213 {
 214         char bootargs[2048], *n, *p, *v;
 215         int err;
 216         phandle_t chosen;
 217         struct bcmsc_softc *sc;
 218
 219         sc = device_get_softc(dev);
 220         sc->dev = dev;
 221
 222         /* Newer firmware versions needs an inverted color palette. */
 223         sc->fbswap = 0;
 224         chosen = OF_finddevice("/chosen");
 225         if (chosen != 0 &&
 226             OF_getprop(chosen, "bootargs", &bootargs, sizeof(bootargs)) > 0) {
 227                 p = bootargs;
 228                 while ((v = strsep(&p, " ")) != NULL) {
 229                         if (*v == '\0')
 230                                 continue;
 231                         n = strsep(&v, "=");
 232                         if (strcmp(n, "bcm2708_fb.fbswap") == 0 && v != NULL)
 233                                 if (*v == '1')
 234                                         sc->fbswap = 1;
 235                 }
 236         }
 237
 238         bcm_fb_sysctl_init(sc);
 239
 240         err = bcm_fb_setup_fbd(sc);
 241         if (err)
 242                 return (err);
 243
 244         return (0);
 245 }
 246
 247 static struct fb_info *
 248 bcm_fb_helper_getinfo(device_t dev)
 249 {
 250         struct bcmsc_softc *sc;
 251
 252         sc = device_get_softc(dev);
 253
 254         return (&sc->info);
 255 }
 256
 257 static device_method_t bcm_fb_methods[] = {
 258         /* Device interface */
 259         DEVMETHOD(device_probe,         bcm_fb_probe),
 260         DEVMETHOD(device_attach,        bcm_fb_attach),
 261
 262         /* Framebuffer service methods */
 263         DEVMETHOD(fb_getinfo,           bcm_fb_helper_getinfo),
 264
 265         DEVMETHOD_END
 266 };
 267
 268 static devclass_t bcm_fb_devclass;
 269
 270 static driver_t bcm_fb_driver = {
 271         "fb",
 272         bcm_fb_methods,
 273         sizeof(struct bcmsc_softc),
 274 };
 275
 276 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
 277 DRIVER_MODULE(bcm2835fb, simplebus, bcm_fb_driver, bcm_fb_devclass, 0, 0);