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/conf.h>
  39 #include <sys/endian.h>
  40 #include <sys/kernel.h>
  41 #include <sys/kthread.h>
  42 #include <sys/lock.h>
  43 #include <sys/malloc.h>
  44 #include <sys/module.h>
  45 #include <sys/mutex.h>
  46 #include <sys/queue.h>
  47 #include <sys/resource.h>
  48 #include <sys/rman.h>
  49 #include <sys/time.h>
  50 #include <sys/timetc.h>
  51 #include <sys/fbio.h>
  52 #include <sys/consio.h>
  53
  54 #include <sys/kdb.h>
  55
  56 #include <machine/bus.h>
  57 #include <machine/cpu.h>
  58 #include <machine/cpufunc.h>
  59 #include <machine/fdt.h>
  60 #include <machine/resource.h>
  61 #include <machine/intr.h>
  62
  63 #include <dev/fdt/fdt_common.h>
  64 #include <dev/ofw/ofw_bus.h>
  65 #include <dev/ofw/ofw_bus_subr.h>
  66
  67 #include <dev/fb/fbreg.h>
  68 #include <dev/vt/vt.h>
  69
  70 #include <arm/broadcom/bcm2835/bcm2835_mbox.h>
  71 #include <arm/broadcom/bcm2835/bcm2835_vcbus.h>
  72
  73 #include "fb_if.h"
  74 #include "mbox_if.h"
  75
  76 #define FB_WIDTH                640
  77 #define FB_HEIGHT               480
  78 #define FB_DEPTH                24
  79
  80 struct bcm_fb_config {
  81         uint32_t        xres;
  82         uint32_t        yres;
  83         uint32_t        vxres;
  84         uint32_t        vyres;
  85         uint32_t        pitch;
  86         uint32_t        bpp;
  87         uint32_t        xoffset;
  88         uint32_t        yoffset;
  89         /* Filled by videocore */
  90         uint32_t        base;
  91         uint32_t        screen_size;
  92 };
  93
  94 struct bcmsc_softc {
  95         device_t                dev;
  96         struct fb_info          *info;
  97         bus_dma_tag_t           dma_tag;
  98         bus_dmamap_t            dma_map;
  99         struct bcm_fb_config*   fb_config;
 100         bus_addr_t              fb_config_phys;
 101         struct intr_config_hook init_hook;
 102 };
 103
 104 static int bcm_fb_probe(device_t);
 105 static int bcm_fb_attach(device_t);
 106 static void bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg,
 107     int err);
 108
 109 static void
 110 bcm_fb_init(void *arg)
 111 {
 112         volatile struct bcm_fb_config *fb_config;
 113         struct bcmsc_softc *sc;
 114         struct fb_info *info;
 115         phandle_t node;
 116         pcell_t cell;
 117         device_t mbox;
 118         device_t fbd;
 119         int err = 0;
 120
 121         sc = arg;
 122         fb_config = sc->fb_config;
 123         node = ofw_bus_get_node(sc->dev);
 124
 125         fb_config->xres = 0;
 126         fb_config->yres = 0;
 127         fb_config->bpp = 0;
 128         fb_config->vxres = 0;
 129         fb_config->vyres = 0;
 130         fb_config->xoffset = 0;
 131         fb_config->yoffset = 0;
 132         fb_config->base = 0;
 133         fb_config->pitch = 0;
 134         fb_config->screen_size = 0;
 135
 136         if ((OF_getprop(node, "broadcom,width", &cell, sizeof(cell))) > 0)
 137                 fb_config->xres = (int)fdt32_to_cpu(cell);
 138         if (fb_config->xres == 0)
 139                 fb_config->xres = FB_WIDTH;
 140
 141         if ((OF_getprop(node, "broadcom,height", &cell, sizeof(cell))) > 0)
 142                 fb_config->yres = (uint32_t)fdt32_to_cpu(cell);
 143         if (fb_config->yres == 0)
 144                 fb_config->yres = FB_HEIGHT;
 145
 146         if ((OF_getprop(node, "broadcom,depth", &cell, sizeof(cell))) > 0)
 147                 fb_config->bpp = (uint32_t)fdt32_to_cpu(cell);
 148         if (fb_config->bpp == 0)
 149                 fb_config->bpp = FB_DEPTH;
 150
 151         bus_dmamap_sync(sc->dma_tag, sc->dma_map,
 152                 BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
 153
 154         mbox = devclass_get_device(devclass_find("mbox"), 0);
 155         if (mbox) {
 156                 MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_FB, sc->fb_config_phys);
 157                 MBOX_READ(mbox, BCM2835_MBOX_CHAN_FB, &err);
 158         }
 159         bus_dmamap_sync(sc->dma_tag, sc->dma_map,
 160                 BUS_DMASYNC_POSTREAD);
 161
 162         if (fb_config->base != 0) {
 163                 device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n",
 164                         fb_config->xres, fb_config->yres,
 165                         fb_config->vxres, fb_config->vyres,
 166                         fb_config->xoffset, fb_config->yoffset,
 167                         fb_config->bpp);
 168
 169                 device_printf(sc->dev, "pitch %d, base 0x%08x, screen_size %d\n",
 170                         fb_config->pitch, fb_config->base,
 171                         fb_config->screen_size);
 172
 173                 info = malloc(sizeof(struct fb_info), M_DEVBUF,
 174                     M_WAITOK | M_ZERO);
 175                 info->fb_name = device_get_nameunit(sc->dev);
 176                 info->fb_vbase = (intptr_t)pmap_mapdev(fb_config->base,
 177                     fb_config->screen_size);
 178                 info->fb_pbase = fb_config->base;
 179                 info->fb_size = fb_config->screen_size;
 180                 info->fb_bpp = info->fb_depth = fb_config->bpp;
 181                 info->fb_stride = fb_config->pitch;
 182                 info->fb_width = fb_config->xres;
 183                 info->fb_height = fb_config->yres;
 184
 185                 sc->info = info;
 186
 187                 fbd = device_add_child(sc->dev, "fbd",
 188                     device_get_unit(sc->dev));
 189                 if (fbd == NULL) {
 190                         device_printf(sc->dev, "Failed to add fbd child\n");
 191                         return;
 192                 }
 193                 if (device_probe_and_attach(fbd) != 0) {
 194                         device_printf(sc->dev, "Failed to attach fbd device\n");
 195                         return;
 196                 }
 197         } else {
 198                 device_printf(sc->dev, "Failed to set framebuffer info\n");
 199                 return;
 200         }
 201
 202         config_intrhook_disestablish(&sc->init_hook);
 203 }
 204
 205 static int
 206 bcm_fb_probe(device_t dev)
 207 {
 208         if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb"))
 209                 return (ENXIO);
 210
 211         device_set_desc(dev, "BCM2835 VT framebuffer driver");
 212
 213         return (BUS_PROBE_DEFAULT);
 214 }
 215
 216 static int
 217 bcm_fb_attach(device_t dev)
 218 {
 219         struct bcmsc_softc *sc = device_get_softc(dev);
 220         int dma_size = sizeof(struct bcm_fb_config);
 221         int err;
 222
 223         sc->dev = dev;
 224
 225         err = bus_dma_tag_create(
 226             bus_get_dma_tag(sc->dev),
 227             PAGE_SIZE, 0,               /* alignment, boundary */
 228             BUS_SPACE_MAXADDR_32BIT,    /* lowaddr */
 229             BUS_SPACE_MAXADDR,          /* highaddr */
 230             NULL, NULL,                 /* filter, filterarg */
 231             dma_size, 1,                /* maxsize, nsegments */
 232             dma_size, 0,                /* maxsegsize, flags */
 233             NULL, NULL,                 /* lockfunc, lockarg */
 234             &sc->dma_tag);
 235
 236         err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->fb_config, 0,
 237             &sc->dma_map);
 238         if (err) {
 239                 device_printf(dev, "cannot allocate framebuffer\n");
 240                 goto fail;
 241         }
 242
 243         err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->fb_config,
 244             dma_size, bcm_fb_dmamap_cb, &sc->fb_config_phys, BUS_DMA_NOWAIT);
 245
 246         if (err) {
 247                 device_printf(dev, "cannot load DMA map\n");
 248                 goto fail;
 249         }
 250
 251         /*
 252          * We have to wait until interrupts are enabled.
 253          * Mailbox relies on it to get data from VideoCore
 254          */
 255         sc->init_hook.ich_func = bcm_fb_init;
 256         sc->init_hook.ich_arg = sc;
 257
 258         if (config_intrhook_establish(&sc->init_hook) != 0) {
 259                 device_printf(dev, "failed to establish intrhook\n");
 260                 return (ENOMEM);
 261         }
 262
 263         return (0);
 264
 265 fail:
 266         return (ENXIO);
 267 }
 268
 269 static void
 270 bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
 271 {
 272         bus_addr_t *addr;
 273
 274         if (err)
 275                 return;
 276
 277         addr = (bus_addr_t*)arg;
 278         *addr = PHYS_TO_VCBUS(segs[0].ds_addr);
 279 }
 280
 281 static struct fb_info *
 282 bcm_fb_helper_getinfo(device_t dev)
 283 {
 284         struct bcmsc_softc *sc;
 285
 286         sc = device_get_softc(dev);
 287
 288         return (sc->info);
 289 }
 290
 291 static device_method_t bcm_fb_methods[] = {
 292         /* Device interface */
 293         DEVMETHOD(device_probe,         bcm_fb_probe),
 294         DEVMETHOD(device_attach,        bcm_fb_attach),
 295
 296         /* Framebuffer service methods */
 297         DEVMETHOD(fb_getinfo,           bcm_fb_helper_getinfo),
 298
 299         DEVMETHOD_END
 300 };
 301
 302 static devclass_t bcm_fb_devclass;
 303
 304 static driver_t bcm_fb_driver = {
 305         "fb",
 306         bcm_fb_methods,
 307         sizeof(struct bcmsc_softc),
 308 };
 309
 310 DRIVER_MODULE(bcm2835fb, ofwbus, bcm_fb_driver, bcm_fb_devclass, 0, 0);