319 lines
7.9 KiB
C
319 lines
7.9 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* Copyright (c) 2012, 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by Oleksandr Rybalko
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/fbio.h>
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#include <sys/consio.h>
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#include <sys/kdb.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/fdt.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/fb/fbreg.h>
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#include <dev/vt/vt.h>
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#include <arm/broadcom/bcm2835/bcm2835_mbox.h>
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#include <arm/broadcom/bcm2835/bcm2835_vcbus.h>
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#include "fb_if.h"
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#include "mbox_if.h"
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#define FB_WIDTH 640
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#define FB_HEIGHT 480
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#define FB_DEPTH 24
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struct bcm_fb_config {
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uint32_t xres;
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uint32_t yres;
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uint32_t vxres;
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uint32_t vyres;
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uint32_t pitch;
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uint32_t bpp;
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uint32_t xoffset;
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uint32_t yoffset;
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/* Filled by videocore */
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uint32_t base;
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uint32_t screen_size;
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};
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struct bcmsc_softc {
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device_t dev;
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struct fb_info *info;
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bus_dma_tag_t dma_tag;
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bus_dmamap_t dma_map;
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struct bcm_fb_config* fb_config;
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bus_addr_t fb_config_phys;
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struct intr_config_hook init_hook;
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};
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static int bcm_fb_probe(device_t);
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static int bcm_fb_attach(device_t);
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static void bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg,
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int err);
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static void
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bcm_fb_init(void *arg)
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{
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volatile struct bcm_fb_config *fb_config;
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struct bcmsc_softc *sc;
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struct fb_info *info;
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phandle_t node;
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pcell_t cell;
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device_t mbox;
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device_t fbd;
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int err = 0;
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sc = arg;
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fb_config = sc->fb_config;
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node = ofw_bus_get_node(sc->dev);
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fb_config->xres = 0;
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fb_config->yres = 0;
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fb_config->bpp = 0;
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fb_config->vxres = 0;
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fb_config->vyres = 0;
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fb_config->xoffset = 0;
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fb_config->yoffset = 0;
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fb_config->base = 0;
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fb_config->pitch = 0;
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fb_config->screen_size = 0;
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if ((OF_getprop(node, "broadcom,width", &cell, sizeof(cell))) > 0)
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fb_config->xres = (int)fdt32_to_cpu(cell);
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if (fb_config->xres == 0)
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fb_config->xres = FB_WIDTH;
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if ((OF_getprop(node, "broadcom,height", &cell, sizeof(cell))) > 0)
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fb_config->yres = (uint32_t)fdt32_to_cpu(cell);
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if (fb_config->yres == 0)
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fb_config->yres = FB_HEIGHT;
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if ((OF_getprop(node, "broadcom,depth", &cell, sizeof(cell))) > 0)
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fb_config->bpp = (uint32_t)fdt32_to_cpu(cell);
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if (fb_config->bpp == 0)
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fb_config->bpp = FB_DEPTH;
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bus_dmamap_sync(sc->dma_tag, sc->dma_map,
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BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
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mbox = devclass_get_device(devclass_find("mbox"), 0);
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if (mbox) {
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MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_FB, sc->fb_config_phys);
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MBOX_READ(mbox, BCM2835_MBOX_CHAN_FB, &err);
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}
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bus_dmamap_sync(sc->dma_tag, sc->dma_map,
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BUS_DMASYNC_POSTREAD);
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if (fb_config->base != 0) {
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device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n",
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fb_config->xres, fb_config->yres,
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fb_config->vxres, fb_config->vyres,
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fb_config->xoffset, fb_config->yoffset,
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fb_config->bpp);
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device_printf(sc->dev, "pitch %d, base 0x%08x, screen_size %d\n",
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fb_config->pitch, fb_config->base,
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fb_config->screen_size);
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info = malloc(sizeof(struct fb_info), M_DEVBUF,
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M_WAITOK | M_ZERO);
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info->fb_name = device_get_nameunit(sc->dev);
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info->fb_vbase = (intptr_t)pmap_mapdev(fb_config->base,
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fb_config->screen_size);
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info->fb_pbase = fb_config->base;
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info->fb_size = fb_config->screen_size;
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info->fb_bpp = info->fb_depth = fb_config->bpp;
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info->fb_stride = fb_config->pitch;
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info->fb_width = fb_config->xres;
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info->fb_height = fb_config->yres;
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sc->info = info;
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fbd = device_add_child(sc->dev, "fbd",
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device_get_unit(sc->dev));
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if (fbd == NULL) {
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device_printf(sc->dev, "Failed to add fbd child\n");
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return;
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}
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if (device_probe_and_attach(fbd) != 0) {
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device_printf(sc->dev, "Failed to attach fbd device\n");
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return;
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}
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} else {
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device_printf(sc->dev, "Failed to set framebuffer info\n");
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return;
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}
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config_intrhook_disestablish(&sc->init_hook);
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}
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static int
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bcm_fb_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb"))
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return (ENXIO);
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device_set_desc(dev, "BCM2835 VT framebuffer driver");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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bcm_fb_attach(device_t dev)
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{
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struct bcmsc_softc *sc = device_get_softc(dev);
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int dma_size = sizeof(struct bcm_fb_config);
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int err;
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sc->dev = dev;
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err = bus_dma_tag_create(
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bus_get_dma_tag(sc->dev),
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PAGE_SIZE, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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dma_size, 1, /* maxsize, nsegments */
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dma_size, 0, /* maxsegsize, flags */
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NULL, NULL, /* lockfunc, lockarg */
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&sc->dma_tag);
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err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->fb_config, 0,
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&sc->dma_map);
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if (err) {
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device_printf(dev, "cannot allocate framebuffer\n");
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goto fail;
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}
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err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->fb_config,
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dma_size, bcm_fb_dmamap_cb, &sc->fb_config_phys, BUS_DMA_NOWAIT);
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if (err) {
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device_printf(dev, "cannot load DMA map\n");
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goto fail;
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}
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/*
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* We have to wait until interrupts are enabled.
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* Mailbox relies on it to get data from VideoCore
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*/
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sc->init_hook.ich_func = bcm_fb_init;
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sc->init_hook.ich_arg = sc;
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if (config_intrhook_establish(&sc->init_hook) != 0) {
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device_printf(dev, "failed to establish intrhook\n");
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return (ENOMEM);
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}
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return (0);
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fail:
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return (ENXIO);
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}
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static void
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bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
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{
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bus_addr_t *addr;
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if (err)
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return;
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addr = (bus_addr_t*)arg;
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*addr = PHYS_TO_VCBUS(segs[0].ds_addr);
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}
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static struct fb_info *
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bcm_fb_helper_getinfo(device_t dev)
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{
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struct bcmsc_softc *sc;
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sc = device_get_softc(dev);
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return (sc->info);
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}
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static device_method_t bcm_fb_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bcm_fb_probe),
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DEVMETHOD(device_attach, bcm_fb_attach),
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/* Framebuffer service methods */
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DEVMETHOD(fb_getinfo, bcm_fb_helper_getinfo),
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DEVMETHOD_END
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};
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static devclass_t bcm_fb_devclass;
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static driver_t bcm_fb_driver = {
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"fb",
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bcm_fb_methods,
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sizeof(struct bcmsc_softc),
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};
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DRIVER_MODULE(bcm2835fb, nexus, bcm_fb_driver, bcm_fb_devclass, 0, 0);
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