mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-27 05:23:34 +00:00
01f1ab67f3
Signed-off-by: Tom Rini <trini@konsulko.com>
465 lines
11 KiB
C
465 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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*/
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#define LOG_CATEGORY UCLASS_VIDEO
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#include <common.h>
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#include <console.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <stdio_dev.h>
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#include <video.h>
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#include <video_console.h>
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#include <asm/cache.h>
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#include <asm/global_data.h>
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#include <dm/lists.h>
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#include <dm/device_compat.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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#ifdef CONFIG_SANDBOX
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#include <asm/sdl.h>
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#endif
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/*
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* Theory of operation:
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*
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* Before relocation each device is bound. The driver for each device must
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* set the @align and @size values in struct video_uc_plat. This
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* information represents the requires size and alignment of the frame buffer
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* for the device. The values can be an over-estimate but cannot be too
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* small. The actual values will be suppled (in the same manner) by the bind()
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* method after relocation. Additionally driver can allocate frame buffer
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* itself by setting plat->base.
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*
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* This information is then picked up by video_reserve() which works out how
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* much memory is needed for all devices. This is allocated between
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* gd->video_bottom and gd->video_top.
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*
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* After relocation the same process occurs. The driver supplies the same
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* @size and @align information and this time video_post_bind() checks that
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* the drivers does not overflow the allocated memory.
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*
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* The frame buffer address is actually set (to plat->base) in
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* video_post_probe(). This function also clears the frame buffer and
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* allocates a suitable text console device. This can then be used to write
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* text to the video device.
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*/
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct video_uc_priv - Information for the video uclass
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*
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* @video_ptr: Current allocation position of the video framebuffer pointer.
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* While binding devices after relocation, this points to the next
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* available address to use for a device's framebuffer. It starts at
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* gd->video_top and works downwards, running out of space when it hits
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* gd->video_bottom.
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*/
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struct video_uc_priv {
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ulong video_ptr;
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};
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void video_set_flush_dcache(struct udevice *dev, bool flush)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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priv->flush_dcache = flush;
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}
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static ulong alloc_fb(struct udevice *dev, ulong *addrp)
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{
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struct video_uc_plat *plat = dev_get_uclass_plat(dev);
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ulong base, align, size;
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if (!plat->size)
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return 0;
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/* Allow drivers to allocate the frame buffer themselves */
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if (plat->base)
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return 0;
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align = plat->align ? plat->align : 1 << 20;
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base = *addrp - plat->size;
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base &= ~(align - 1);
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plat->base = base;
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size = *addrp - base;
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*addrp = base;
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return size;
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}
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int video_reserve(ulong *addrp)
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{
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struct udevice *dev;
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ulong size;
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gd->video_top = *addrp;
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for (uclass_find_first_device(UCLASS_VIDEO, &dev);
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dev;
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uclass_find_next_device(&dev)) {
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size = alloc_fb(dev, addrp);
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debug("%s: Reserving %lx bytes at %lx for video device '%s'\n",
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__func__, size, *addrp, dev->name);
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}
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/* Allocate space for PCI video devices in case there were not bound */
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if (*addrp == gd->video_top)
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*addrp -= CONFIG_VIDEO_PCI_DEFAULT_FB_SIZE;
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gd->video_bottom = *addrp;
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gd->fb_base = *addrp;
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debug("Video frame buffers from %lx to %lx\n", gd->video_bottom,
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gd->video_top);
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return 0;
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}
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int video_clear(struct udevice *dev)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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int ret;
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switch (priv->bpix) {
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case VIDEO_BPP16:
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if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
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u16 *ppix = priv->fb;
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u16 *end = priv->fb + priv->fb_size;
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while (ppix < end)
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*ppix++ = priv->colour_bg;
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break;
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}
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case VIDEO_BPP32:
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if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
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u32 *ppix = priv->fb;
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u32 *end = priv->fb + priv->fb_size;
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while (ppix < end)
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*ppix++ = priv->colour_bg;
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break;
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}
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default:
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memset(priv->fb, priv->colour_bg, priv->fb_size);
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break;
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}
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ret = video_sync_copy(dev, priv->fb, priv->fb + priv->fb_size);
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if (ret)
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return ret;
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return video_sync(dev, false);
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}
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void video_set_default_colors(struct udevice *dev, bool invert)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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int fore, back;
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if (CONFIG_IS_ENABLED(SYS_WHITE_ON_BLACK)) {
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/* White is used when switching to bold, use light gray here */
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fore = VID_LIGHT_GRAY;
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back = VID_BLACK;
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} else {
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fore = VID_BLACK;
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back = VID_WHITE;
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}
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if (invert) {
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int temp;
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temp = fore;
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fore = back;
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back = temp;
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}
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priv->fg_col_idx = fore;
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priv->bg_col_idx = back;
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priv->colour_fg = vid_console_color(priv, fore);
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priv->colour_bg = vid_console_color(priv, back);
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}
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/* Flush video activity to the caches */
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int video_sync(struct udevice *vid, bool force)
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{
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struct video_ops *ops = video_get_ops(vid);
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int ret;
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if (ops && ops->video_sync) {
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ret = ops->video_sync(vid);
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if (ret)
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return ret;
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}
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/*
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* flush_dcache_range() is declared in common.h but it seems that some
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* architectures do not actually implement it. Is there a way to find
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* out whether it exists? For now, ARM is safe.
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*/
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#if defined(CONFIG_ARM) && !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
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struct video_priv *priv = dev_get_uclass_priv(vid);
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if (priv->flush_dcache) {
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flush_dcache_range((ulong)priv->fb,
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ALIGN((ulong)priv->fb + priv->fb_size,
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CONFIG_SYS_CACHELINE_SIZE));
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}
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#elif defined(CONFIG_VIDEO_SANDBOX_SDL)
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struct video_priv *priv = dev_get_uclass_priv(vid);
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static ulong last_sync;
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if (force || get_timer(last_sync) > 100) {
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sandbox_sdl_sync(priv->fb);
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last_sync = get_timer(0);
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}
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#endif
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return 0;
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}
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void video_sync_all(void)
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{
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struct udevice *dev;
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int ret;
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for (uclass_find_first_device(UCLASS_VIDEO, &dev);
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dev;
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uclass_find_next_device(&dev)) {
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if (device_active(dev)) {
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ret = video_sync(dev, true);
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if (ret)
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dev_dbg(dev, "Video sync failed\n");
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}
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}
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}
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bool video_is_active(void)
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{
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struct udevice *dev;
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for (uclass_find_first_device(UCLASS_VIDEO, &dev);
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dev;
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uclass_find_next_device(&dev)) {
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if (device_active(dev))
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return true;
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}
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return false;
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}
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int video_get_xsize(struct udevice *dev)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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return priv->xsize;
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}
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int video_get_ysize(struct udevice *dev)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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return priv->ysize;
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}
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#ifdef CONFIG_VIDEO_COPY
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int video_sync_copy(struct udevice *dev, void *from, void *to)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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if (priv->copy_fb) {
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long offset, size;
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/* Find the offset of the first byte to copy */
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if ((ulong)to > (ulong)from) {
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size = to - from;
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offset = from - priv->fb;
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} else {
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size = from - to;
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offset = to - priv->fb;
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}
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/*
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* Allow a bit of leeway for valid requests somewhere near the
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* frame buffer
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*/
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if (offset < -priv->fb_size || offset > 2 * priv->fb_size) {
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#ifdef DEBUG
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char str[120];
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snprintf(str, sizeof(str),
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"[** FAULT sync_copy fb=%p, from=%p, to=%p, offset=%lx]",
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priv->fb, from, to, offset);
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console_puts_select_stderr(true, str);
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#endif
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return -EFAULT;
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}
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/*
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* Silently crop the memcpy. This allows callers to avoid doing
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* this themselves. It is common for the end pointer to go a
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* few lines after the end of the frame buffer, since most of
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* the update algorithms terminate a line after their last write
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*/
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if (offset + size > priv->fb_size) {
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size = priv->fb_size - offset;
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} else if (offset < 0) {
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size += offset;
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offset = 0;
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}
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memcpy(priv->copy_fb + offset, priv->fb + offset, size);
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}
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return 0;
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}
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int video_sync_copy_all(struct udevice *dev)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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video_sync_copy(dev, priv->fb, priv->fb + priv->fb_size);
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return 0;
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}
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#endif
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#define SPLASH_DECL(_name) \
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extern u8 __splash_ ## _name ## _begin[]; \
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extern u8 __splash_ ## _name ## _end[]
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#define SPLASH_START(_name) __splash_ ## _name ## _begin
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SPLASH_DECL(u_boot_logo);
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static int show_splash(struct udevice *dev)
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{
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u8 *data = SPLASH_START(u_boot_logo);
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int ret;
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ret = video_bmp_display(dev, map_to_sysmem(data), -4, 4, true);
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return 0;
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}
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/* Set up the display ready for use */
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static int video_post_probe(struct udevice *dev)
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{
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struct video_uc_plat *plat = dev_get_uclass_plat(dev);
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struct video_priv *priv = dev_get_uclass_priv(dev);
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char name[30], drv[15], *str;
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const char *drv_name = drv;
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struct udevice *cons;
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int ret;
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/* Set up the line and display size */
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priv->fb = map_sysmem(plat->base, plat->size);
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if (!priv->line_length)
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priv->line_length = priv->xsize * VNBYTES(priv->bpix);
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priv->fb_size = priv->line_length * priv->ysize;
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if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->copy_base)
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priv->copy_fb = map_sysmem(plat->copy_base, plat->size);
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/* Set up colors */
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video_set_default_colors(dev, false);
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if (!CONFIG_IS_ENABLED(NO_FB_CLEAR))
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video_clear(dev);
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/*
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* Create a text console device. For now we always do this, although
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* it might be useful to support only bitmap drawing on the device
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* for boards that don't need to display text. We create a TrueType
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* console if enabled, a rotated console if the video driver requests
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* it, otherwise a normal console.
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*
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* The console can be override by setting vidconsole_drv_name before
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* probing this video driver, or in the probe() method.
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*
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* TrueType does not support rotation at present so fall back to the
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* rotated console in that case.
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*/
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if (!priv->rot && IS_ENABLED(CONFIG_CONSOLE_TRUETYPE)) {
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snprintf(name, sizeof(name), "%s.vidconsole_tt", dev->name);
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strcpy(drv, "vidconsole_tt");
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} else {
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snprintf(name, sizeof(name), "%s.vidconsole%d", dev->name,
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priv->rot);
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snprintf(drv, sizeof(drv), "vidconsole%d", priv->rot);
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}
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str = strdup(name);
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if (!str)
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return -ENOMEM;
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if (priv->vidconsole_drv_name)
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drv_name = priv->vidconsole_drv_name;
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ret = device_bind_driver(dev, drv_name, str, &cons);
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if (ret) {
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debug("%s: Cannot bind console driver\n", __func__);
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return ret;
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}
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ret = device_probe(cons);
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if (ret) {
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debug("%s: Cannot probe console driver\n", __func__);
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return ret;
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}
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if (IS_ENABLED(CONFIG_VIDEO_LOGO) &&
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!IS_ENABLED(CONFIG_SPLASH_SCREEN) && !plat->hide_logo) {
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ret = show_splash(dev);
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if (ret) {
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log_debug("Cannot show splash screen\n");
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return ret;
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}
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}
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return 0;
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};
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/* Post-relocation, allocate memory for the frame buffer */
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static int video_post_bind(struct udevice *dev)
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{
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struct video_uc_priv *uc_priv;
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ulong addr;
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ulong size;
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/* Before relocation there is nothing to do here */
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if (!(gd->flags & GD_FLG_RELOC))
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return 0;
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/* Set up the video pointer, if this is the first device */
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uc_priv = uclass_get_priv(dev->uclass);
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if (!uc_priv->video_ptr)
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uc_priv->video_ptr = gd->video_top;
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/* Allocate framebuffer space for this device */
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addr = uc_priv->video_ptr;
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size = alloc_fb(dev, &addr);
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if (addr < gd->video_bottom) {
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/* Device tree node may need the 'u-boot,dm-pre-reloc' or
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* 'u-boot,dm-pre-proper' tag
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*/
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printf("Video device '%s' cannot allocate frame buffer memory -ensure the device is set up before relocation\n",
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dev->name);
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return -ENOSPC;
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}
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debug("%s: Claiming %lx bytes at %lx for video device '%s'\n",
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__func__, size, addr, dev->name);
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uc_priv->video_ptr = addr;
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return 0;
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}
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UCLASS_DRIVER(video) = {
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.id = UCLASS_VIDEO,
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.name = "video",
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.flags = DM_UC_FLAG_SEQ_ALIAS,
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.post_bind = video_post_bind,
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.post_probe = video_post_probe,
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.priv_auto = sizeof(struct video_uc_priv),
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.per_device_auto = sizeof(struct video_priv),
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.per_device_plat_auto = sizeof(struct video_uc_plat),
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};
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