Add vt support for RPi. (No early stage yet.)

Sponsored by:	The FreeBSD Foundation

1 files changed, 307 insertions, 0 deletions

diff --git a/sys/arm/broadcom/bcm2835/bcm2835_fbd.c b/sys/arm/broadcom/bcm2835/bcm2835_fbd.c
new file mode 100644
index 000000000000..c5e6c77a2e52
--- /dev/null
+++ b/sys/arm/broadcom/bcm2835/bcm2835_fbd.c
@@ -0,0 +1,307 @@
+/*-
+ * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/endian.h>
+#include <sys/kernel.h>
+#include <sys/kthread.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/queue.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+#include <sys/time.h>
+#include <sys/timetc.h>
+#include <sys/fbio.h>
+#include <sys/consio.h>
+
+#include <sys/kdb.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/fb/fbreg.h>
+#include <dev/vt/vt.h>
+
+#include <arm/broadcom/bcm2835/bcm2835_mbox.h>
+#include <arm/broadcom/bcm2835/bcm2835_vcbus.h>
+
+#include "fb_if.h"
+#include "mbox_if.h"
+
+#define FB_WIDTH		640
+#define FB_HEIGHT		480
+#define FB_DEPTH		24
+
+struct bcm_fb_config {
+	uint32_t	xres;
+	uint32_t	yres;
+	uint32_t	vxres;
+	uint32_t	vyres;
+	uint32_t	pitch;
+	uint32_t	bpp;
+	uint32_t	xoffset;
+	uint32_t	yoffset;
+	/* Filled by videocore */
+	uint32_t	base;
+	uint32_t	screen_size;
+};
+
+struct bcmsc_softc {
+	device_t		dev;
+	struct fb_info 		*info;
+	bus_dma_tag_t		dma_tag;
+	bus_dmamap_t		dma_map;
+	struct bcm_fb_config*	fb_config;
+	bus_addr_t		fb_config_phys;
+	struct intr_config_hook	init_hook;
+
+};
+
+static int bcm_fb_probe(device_t);
+static int bcm_fb_attach(device_t);
+static void bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err);
+
+static void
+bcm_fb_init(void *arg)
+{
+	struct bcmsc_softc *sc = arg;
+	volatile struct bcm_fb_config*	fb_config = sc->fb_config;
+	struct fb_info *info;
+	phandle_t node;
+	pcell_t cell;
+	device_t mbox;
+	device_t fbd;
+	int err = 0;
+
+	node = ofw_bus_get_node(sc->dev);
+
+	fb_config->xres = 0;
+	fb_config->yres = 0;
+	fb_config->bpp = 0;
+	fb_config->vxres = 0;
+	fb_config->vyres = 0;
+	fb_config->xoffset = 0;
+	fb_config->yoffset = 0;
+	fb_config->base = 0;
+	fb_config->pitch = 0;
+	fb_config->screen_size = 0;
+
+	if ((OF_getprop(node, "broadcom,width", &cell, sizeof(cell))) > 0)
+		fb_config->xres = (int)fdt32_to_cpu(cell);
+	if (fb_config->xres == 0)
+		fb_config->xres = FB_WIDTH;
+
+	if ((OF_getprop(node, "broadcom,height", &cell, sizeof(cell))) > 0)
+		fb_config->yres = (uint32_t)fdt32_to_cpu(cell);
+	if (fb_config->yres == 0)
+		fb_config->yres = FB_HEIGHT;
+
+	if ((OF_getprop(node, "broadcom,depth", &cell, sizeof(cell))) > 0)
+		fb_config->bpp = (uint32_t)fdt32_to_cpu(cell);
+	if (fb_config->bpp == 0)
+		fb_config->bpp = FB_DEPTH;
+
+	bus_dmamap_sync(sc->dma_tag, sc->dma_map,
+		BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
+
+	mbox = devclass_get_device(devclass_find("mbox"), 0);
+	if (mbox) {
+		MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_FB, sc->fb_config_phys);
+		MBOX_READ(mbox, BCM2835_MBOX_CHAN_FB, &err);
+	}
+	bus_dmamap_sync(sc->dma_tag, sc->dma_map,
+		BUS_DMASYNC_POSTREAD);
+
+	if (fb_config->base != 0) {
+		device_printf(sc->dev, "%dx%d(%dx%d@%d,%d) %dbpp\n", 
+			fb_config->xres, fb_config->yres,
+			fb_config->vxres, fb_config->vyres,
+			fb_config->xoffset, fb_config->yoffset,
+			fb_config->bpp);
+
+
+		device_printf(sc->dev, "pitch %d, base 0x%08x, screen_size %d\n", 
+			fb_config->pitch, fb_config->base,
+			fb_config->screen_size);
+
+
+
+
+		info = malloc(sizeof(struct fb_info), M_DEVBUF, M_WAITOK | M_ZERO);
+		info->fb_name = device_get_nameunit(sc->dev);
+		info->fb_vbase = (intptr_t)pmap_mapdev(fb_config->base, fb_config->screen_size);
+		info->fb_pbase = fb_config->base;
+		info->fb_size = fb_config->screen_size;
+		info->fb_bpp = info->fb_depth = fb_config->bpp;
+		info->fb_stride = fb_config->pitch;
+		info->fb_width = fb_config->xres;
+		info->fb_height = fb_config->yres;
+
+		sc->info = info;
+
+		fbd = device_add_child(sc->dev, "fbd", device_get_unit(sc->dev));
+		if (fbd == NULL) {
+			device_printf(sc->dev, "Failed to add fbd child\n");
+			return;
+		}
+		if (device_probe_and_attach(fbd) != 0) {
+			device_printf(sc->dev, "Failed to attach fbd device\n");
+			return;
+		}
+
+
+	} else {
+		device_printf(sc->dev, "Failed to set framebuffer info\n");
+		return;
+	}
+
+	config_intrhook_disestablish(&sc->init_hook);
+}
+
+static int
+bcm_fb_probe(device_t dev)
+{
+	if (!ofw_bus_is_compatible(dev, "broadcom,bcm2835-fb"))
+		return (ENXIO);
+
+	device_set_desc(dev, "BCM2835 VT framebuffer driver");
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+bcm_fb_attach(device_t dev)
+{
+	struct bcmsc_softc *sc = device_get_softc(dev);
+	int dma_size = sizeof(struct bcm_fb_config);
+	int err;
+
+	sc->dev = dev;
+
+	err = bus_dma_tag_create(
+	    bus_get_dma_tag(sc->dev),
+	    PAGE_SIZE, 0,		/* alignment, boundary */
+	    BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
+	    BUS_SPACE_MAXADDR,		/* highaddr */
+	    NULL, NULL,			/* filter, filterarg */
+	    dma_size, 1,		/* maxsize, nsegments */
+	    dma_size, 0,		/* maxsegsize, flags */
+	    NULL, NULL,			/* lockfunc, lockarg */
+	    &sc->dma_tag);
+
+	err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->fb_config, 0,
+	    &sc->dma_map);
+	if (err) {
+		device_printf(dev, "cannot allocate framebuffer\n");
+		goto fail;
+	}
+
+	err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->fb_config,
+	    dma_size, bcm_fb_dmamap_cb, &sc->fb_config_phys, BUS_DMA_NOWAIT);
+
+	if (err) {
+		device_printf(dev, "cannot load DMA map\n");
+		goto fail;
+	}
+
+	/* 
+	 * We have to wait until interrupts are enabled. 
+	 * Mailbox relies on it to get data from VideoCore
+	 */
+        sc->init_hook.ich_func = bcm_fb_init;
+        sc->init_hook.ich_arg = sc;
+
+        if (config_intrhook_establish(&sc->init_hook) != 0) {
+		device_printf(dev, "failed to establish intrhook\n");
+                return (ENOMEM);
+	}
+
+	return (0);
+
+fail:
+	return (ENXIO);
+}
+
+
+static void
+bcm_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
+{
+	bus_addr_t *addr;
+
+	if (err)
+		return;
+
+	addr = (bus_addr_t*)arg;
+	*addr = PHYS_TO_VCBUS(segs[0].ds_addr);
+}
+
+static struct fb_info *
+bcm_fb_helper_getinfo(device_t dev)
+{
+	struct bcmsc_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	return (sc->info);
+}
+
+static device_method_t bcm_fb_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		bcm_fb_probe),
+	DEVMETHOD(device_attach,	bcm_fb_attach),
+
+	/* Framebuffer service methods */
+	DEVMETHOD(fb_getinfo,		bcm_fb_helper_getinfo),
+
+	DEVMETHOD_END
+};
+
+static devclass_t bcm_fb_devclass;
+
+static driver_t bcm_fb_driver = {
+	"fb",
+	bcm_fb_methods,
+	sizeof(struct bcmsc_softc),
+};
+
+DRIVER_MODULE(bcm2835fb, nexus, bcm_fb_driver, bcm_fb_devclass, 0, 0);