video: add a BCM2835 framebuffer driver
Use the mailbox driver to set up a framebuffer based on the firmware configuration. Signed-off-by: Andre Heider <a.heider@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -140,6 +140,7 @@ static int rpi_env_init(void)
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static int rpi_devices_init(void)
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{
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bcm2835_register_mci();
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bcm2835_register_fb();
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armlinux_set_architecture(MACH_TYPE_BCM2708);
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armlinux_set_bootparams((void *)(0x00000100));
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rpi_env_init();
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@ -27,4 +27,9 @@ static void inline bcm2835_register_mci(void)
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IORESOURCE_MEM, NULL);
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}
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static void inline bcm2835_register_fb(void)
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{
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add_generic_device("bcm2835_fb", 0, NULL, 0, 0, 0, NULL);
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}
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#endif
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@ -71,4 +71,10 @@ config DRIVER_VIDEO_PXA
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Add support for the frame buffer device found on the PXA270
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CPU.
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config DRIVER_VIDEO_BCM2835
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bool "BCM2835 framebuffer driver"
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depends on ARCH_BCM2835
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help
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Add support for the BCM2835/VideoCore frame buffer device.
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endif
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@ -9,3 +9,4 @@ obj-$(CONFIG_DRIVER_VIDEO_S3C24XX) += s3c24xx.o
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obj-$(CONFIG_DRIVER_VIDEO_PXA) += pxa.o
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obj-$(CONFIG_DRIVER_VIDEO_SDL) += sdl.o
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obj-$(CONFIG_DRIVER_VIDEO_OMAP) += omap.o
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obj-$(CONFIG_DRIVER_VIDEO_BCM2835) += bcm2835.o
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@ -0,0 +1,136 @@
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/*
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* BCM2835 framebuffer driver
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*
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* Copyright (C) 2013 Andre Heider
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <driver.h>
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#include <errno.h>
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#include <fb.h>
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#include <init.h>
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#include <malloc.h>
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#include <xfuncs.h>
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#include <mach/mbox.h>
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struct bcm2835fb_info {
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struct fb_info fbi;
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struct fb_videomode mode;
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};
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struct msg_fb_query {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_physical_w_h physical_w_h;
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u32 end_tag;
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};
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struct msg_fb_setup {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_physical_w_h physical_w_h;
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struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
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struct bcm2835_mbox_tag_depth depth;
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struct bcm2835_mbox_tag_pixel_order pixel_order;
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struct bcm2835_mbox_tag_alpha_mode alpha_mode;
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struct bcm2835_mbox_tag_virtual_offset virtual_offset;
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struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
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struct bcm2835_mbox_tag_pitch pitch;
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u32 end_tag;
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};
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static void bcm2835fb_enable(struct fb_info *info)
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{
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}
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static void bcm2835fb_disable(struct fb_info *info)
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{
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}
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static struct fb_ops bcm2835fb_ops = {
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.fb_enable = bcm2835fb_enable,
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.fb_disable = bcm2835fb_disable,
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};
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static int bcm2835fb_probe(struct device_d *dev)
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{
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BCM2835_MBOX_STACK_ALIGN(struct msg_fb_query, msg_query);
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BCM2835_MBOX_STACK_ALIGN(struct msg_fb_setup, msg_setup);
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struct bcm2835fb_info *info;
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u32 w, h;
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int ret;
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BCM2835_MBOX_INIT_HDR(msg_query);
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BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
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GET_PHYSICAL_W_H);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
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if (ret) {
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dev_err(dev, "could not query display resolution\n");
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return ret;
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}
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w = msg_query->physical_w_h.body.resp.width;
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h = msg_query->physical_w_h.body.resp.height;
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BCM2835_MBOX_INIT_HDR(msg_setup);
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BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
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msg_setup->physical_w_h.body.req.width = w;
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msg_setup->physical_w_h.body.req.height = h;
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BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
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msg_setup->virtual_w_h.body.req.width = w;
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msg_setup->virtual_w_h.body.req.height = h;
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BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
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msg_setup->depth.body.req.bpp = 16;
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BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
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msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
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BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
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msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
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BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
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msg_setup->virtual_offset.body.req.x = 0;
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msg_setup->virtual_offset.body.req.y = 0;
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BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
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msg_setup->allocate_buffer.body.req.alignment = 0x100;
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BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
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if (ret) {
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dev_err(dev, "could not configure display\n");
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return ret;
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}
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info = xzalloc(sizeof *info);
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info->fbi.fbops = &bcm2835fb_ops;
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info->fbi.screen_base =
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(void *)msg_setup->allocate_buffer.body.resp.fb_address;
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info->fbi.xres = msg_setup->physical_w_h.body.resp.width;
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info->fbi.yres = msg_setup->physical_w_h.body.resp.height;
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info->fbi.bits_per_pixel = 16;
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info->fbi.line_length = msg_setup->pitch.body.resp.pitch;
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info->fbi.red.length = 5;
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info->fbi.red.offset = 11;
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info->fbi.green.length = 6;
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info->fbi.green.offset = 5;
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info->fbi.blue.length = 5;
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info->fbi.blue.offset = 0;
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info->fbi.mode = &info->mode;
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info->fbi.mode->xres = info->fbi.xres;
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info->fbi.mode->yres = info->fbi.yres;
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ret = register_framebuffer(&info->fbi);
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if (ret) {
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free(info);
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dev_err(dev, "failed to register framebuffer: %d\n", ret);
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return ret;
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}
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dev_info(dev, "registered\n");
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return 0;
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}
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static struct driver_d bcm2835fb_driver = {
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.name = "bcm2835_fb",
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.probe = bcm2835fb_probe,
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};
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device_platform_driver(bcm2835fb_driver);
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