From 0f705e869b25fae6a4d551dd2a252b3a0571ed34 Mon Sep 17 00:00:00 2001 From: Aleksandr Rybalko Date: Tue, 17 Dec 2013 15:23:47 +0000 Subject: Add vt support for RPi. (No early stage yet.) Sponsored by: The FreeBSD Foundation --- sys/arm/broadcom/bcm2835/bcm2835_fbd.c | 307 +++++++++++++++++++++++++++++++++ 1 file changed, 307 insertions(+) create mode 100644 sys/arm/broadcom/bcm2835/bcm2835_fbd.c (limited to 'sys/arm/broadcom/bcm2835/bcm2835_fbd.c') 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 + * 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 +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include + +#include +#include + +#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); -- cgit v1.2.3