[people/ms/u-boot.git] / drivers / video / video-uclass.c

/*
 * Copyright (c) 2015 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <mapmem.h>
#include <stdio_dev.h>
#include <video.h>
#include <video_console.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
#ifdef CONFIG_SANDBOX
#include <asm/sdl.h>
#endif

/*
 * Theory of operation:
 *
 * Before relocation each device is bound. The driver for each device must
 * set the @align and @size values in struct video_uc_platdata. This
 * information represents the requires size and alignment of the frame buffer
 * for the device. The values can be an over-estimate but cannot be too
 * small. The actual values will be suppled (in the same manner) by the bind()
 * method after relocation.
 *
 * This information is then picked up by video_reserve() which works out how
 * much memory is needed for all devices. This is allocated between
 * gd->video_bottom and gd->video_top.
 *
 * After relocation the same process occurs. The driver supplies the same
 * @size and @align information and this time video_post_bind() checks that
 * the drivers does not overflow the allocated memory.
 *
 * The frame buffer address is actually set (to plat->base) in
 * video_post_probe(). This function also clears the frame buffer and
 * allocates a suitable text console device. This can then be used to write
 * text to the video device.
 */
DECLARE_GLOBAL_DATA_PTR;

void video_set_flush_dcache(struct udevice *dev, bool flush)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	priv->flush_dcache = flush;
}

static ulong alloc_fb(struct udevice *dev, ulong *addrp)
{
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
	ulong base, align, size;

	if (!plat->size)
		return 0;

	align = plat->align ? plat->align : 1 << 20;
	base = *addrp - plat->size;
	base &= ~(align - 1);
	plat->base = base;
	size = *addrp - base;
	*addrp = base;

	return size;
}

int video_reserve(ulong *addrp)
{
	struct udevice *dev;
	ulong size;

	gd->video_top = *addrp;
	for (uclass_find_first_device(UCLASS_VIDEO, &dev);
	     dev;
	     uclass_find_next_device(&dev)) {
		size = alloc_fb(dev, addrp);
		debug("%s: Reserving %lx bytes at %lx for video device '%s'\n",
		      __func__, size, *addrp, dev->name);
	}
	gd->video_bottom = *addrp;
	debug("Video frame buffers from %lx to %lx\n", gd->video_bottom,
	      gd->video_top);

	return 0;
}

static int video_clear(struct udevice *dev)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	if (priv->bpix == VIDEO_BPP32) {
		u32 *ppix = priv->fb;
		u32 *end = priv->fb + priv->fb_size;

		while (ppix < end)
			*ppix++ = priv->colour_bg;
	} else {
		memset(priv->fb, priv->colour_bg, priv->fb_size);
	}

	return 0;
}

/* Flush video activity to the caches */
void video_sync(struct udevice *vid)
{
	/*
	 * flush_dcache_range() is declared in common.h but it seems that some
	 * architectures do not actually implement it. Is there a way to find
	 * out whether it exists? For now, ARM is safe.
	 */
#if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
	struct video_priv *priv = dev_get_uclass_priv(vid);

	if (priv->flush_dcache) {
		flush_dcache_range((ulong)priv->fb,
				   (ulong)priv->fb + priv->fb_size);
	}
#elif defined(CONFIG_VIDEO_SANDBOX_SDL)
	struct video_priv *priv = dev_get_uclass_priv(vid);
	static ulong last_sync;

	if (get_timer(last_sync) > 10) {
		sandbox_sdl_sync(priv->fb);
		last_sync = get_timer(0);
	}
#endif
}

void video_sync_all(void)
{
	struct udevice *dev;

	for (uclass_find_first_device(UCLASS_VIDEO, &dev);
	     dev;
	     uclass_find_next_device(&dev)) {
		if (device_active(dev))
			video_sync(dev);
	}
}

int video_get_xsize(struct udevice *dev)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	return priv->xsize;
}

int video_get_ysize(struct udevice *dev)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	return priv->ysize;
}

/* Set up the colour map */
static int video_pre_probe(struct udevice *dev)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	priv->cmap = calloc(256, sizeof(ushort));
	if (!priv->cmap)
		return -ENOMEM;

	return 0;
}

static int video_pre_remove(struct udevice *dev)
{
	struct video_priv *priv = dev_get_uclass_priv(dev);

	free(priv->cmap);

	return 0;
}

/* Set up the display ready for use */
static int video_post_probe(struct udevice *dev)
{
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
	struct video_priv *priv = dev_get_uclass_priv(dev);
	char name[30], drv[15], *str;
	const char *drv_name = drv;
	struct udevice *cons;
	int ret;

	/* Set up the line and display size */
	priv->fb = map_sysmem(plat->base, plat->size);
	priv->line_length = priv->xsize * VNBYTES(priv->bpix);
	priv->fb_size = priv->line_length * priv->ysize;

	/* Set up colours - we could in future support other colours */
#ifdef CONFIG_SYS_WHITE_ON_BLACK
	priv->colour_fg = 0xffffff;
#else
	priv->colour_bg = 0xffffff;
#endif
	video_clear(dev);

	/*
	 * Create a text console device. For now we always do this, although
	 * it might be useful to support only bitmap drawing on the device
	 * for boards that don't need to display text. We create a TrueType
	 * console if enabled, a rotated console if the video driver requests
	 * it, otherwise a normal console.
	 *
	 * The console can be override by setting vidconsole_drv_name before
	 * probing this video driver, or in the probe() method.
	 *
	 * TrueType does not support rotation at present so fall back to the
	 * rotated console in that case.
	 */
	if (!priv->rot && IS_ENABLED(CONFIG_CONSOLE_TRUETYPE)) {
		snprintf(name, sizeof(name), "%s.vidconsole_tt", dev->name);
		strcpy(drv, "vidconsole_tt");
	} else {
		snprintf(name, sizeof(name), "%s.vidconsole%d", dev->name,
			 priv->rot);
		snprintf(drv, sizeof(drv), "vidconsole%d", priv->rot);
	}

	str = strdup(name);
	if (!str)
		return -ENOMEM;
	if (priv->vidconsole_drv_name)
		drv_name = priv->vidconsole_drv_name;
	ret = device_bind_driver(dev, drv_name, str, &cons);
	if (ret) {
		debug("%s: Cannot bind console driver\n", __func__);
		return ret;
	}

	ret = device_probe(cons);
	if (ret) {
		debug("%s: Cannot probe console driver\n", __func__);
		return ret;
	}

	return 0;
};

/* Post-relocation, allocate memory for the frame buffer */
static int video_post_bind(struct udevice *dev)
{
	ulong addr = gd->video_top;
	ulong size;

	/* Before relocation there is nothing to do here */
	if ((!gd->flags & GD_FLG_RELOC))
		return 0;
	size = alloc_fb(dev, &addr);
	if (addr < gd->video_bottom) {
		/* Device tree node may need the 'u-boot,dm-pre-reloc' tag */
		printf("Video device '%s' cannot allocate frame buffer memory -ensure the device is set up before relocation\n",
		       dev->name);
		return -ENOSPC;
	}
	debug("%s: Claiming %lx bytes at %lx for video device '%s'\n",
	      __func__, size, addr, dev->name);
	gd->video_bottom = addr;

	return 0;
}

UCLASS_DRIVER(video) = {
	.id		= UCLASS_VIDEO,
	.name		= "video",
	.flags		= DM_UC_FLAG_SEQ_ALIAS,
	.post_bind	= video_post_bind,
	.pre_probe	= video_pre_probe,
	.post_probe	= video_post_probe,
	.pre_remove	= video_pre_remove,
	.per_device_auto_alloc_size	= sizeof(struct video_priv),
	.per_device_platdata_auto_alloc_size = sizeof(struct video_uc_platdata),
};
Commit	Line	Data
1acafc73 SG	1	/*
	2	* Copyright (c) 2015 Google, Inc
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <mapmem.h>
	10	#include <stdio_dev.h>
	11	#include <video.h>
	12	#include <video_console.h>
	13	#include <dm/lists.h>
	14	#include <dm/device-internal.h>
	15	#include <dm/uclass-internal.h>
	16	#ifdef CONFIG_SANDBOX
	17	#include <asm/sdl.h>
	18	#endif
	19
	20	/*
	21	* Theory of operation:
	22	*
	23	* Before relocation each device is bound. The driver for each device must
	24	* set the @align and @size values in struct video_uc_platdata. This
	25	* information represents the requires size and alignment of the frame buffer
	26	* for the device. The values can be an over-estimate but cannot be too
	27	* small. The actual values will be suppled (in the same manner) by the bind()
	28	* method after relocation.
	29	*
	30	* This information is then picked up by video_reserve() which works out how
	31	* much memory is needed for all devices. This is allocated between
	32	* gd->video_bottom and gd->video_top.
	33	*
	34	* After relocation the same process occurs. The driver supplies the same
	35	* @size and @align information and this time video_post_bind() checks that
	36	* the drivers does not overflow the allocated memory.
	37	*
	38	* The frame buffer address is actually set (to plat->base) in
	39	* video_post_probe(). This function also clears the frame buffer and
	40	* allocates a suitable text console device. This can then be used to write
	41	* text to the video device.
	42	*/
	43	DECLARE_GLOBAL_DATA_PTR;
	44
68dcdc99 SG	45	void video_set_flush_dcache(struct udevice *dev, bool flush)
	46	{
	47	struct video_priv *priv = dev_get_uclass_priv(dev);
	48
	49	priv->flush_dcache = flush;
	50	}
	51
1acafc73 SG	52	static ulong alloc_fb(struct udevice dev, ulong addrp)
	53	{
	54	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
	55	ulong base, align, size;
	56
3968398e BM	57	if (!plat->size)
	58	return 0;
	59
1acafc73 SG	60	align = plat->align ? plat->align : 1 << 20;
	61	base = *addrp - plat->size;
	62	base &= ~(align - 1);
	63	plat->base = base;
	64	size = *addrp - base;
	65	*addrp = base;
	66
	67	return size;
	68	}
	69
	70	int video_reserve(ulong *addrp)
	71	{
	72	struct udevice *dev;
	73	ulong size;
	74
	75	gd->video_top = *addrp;
	76	for (uclass_find_first_device(UCLASS_VIDEO, &dev);
	77	dev;
	78	uclass_find_next_device(&dev)) {
	79	size = alloc_fb(dev, addrp);
	80	debug("%s: Reserving %lx bytes at %lx for video device '%s'\n",
	81	__func__, size, *addrp, dev->name);
	82	}
	83	gd->video_bottom = *addrp;
	84	debug("Video frame buffers from %lx to %lx\n", gd->video_bottom,
	85	gd->video_top);
	86
	87	return 0;
	88	}
	89
	90	static int video_clear(struct udevice *dev)
	91	{
	92	struct video_priv *priv = dev_get_uclass_priv(dev);
	93
	94	if (priv->bpix == VIDEO_BPP32) {
	95	u32 *ppix = priv->fb;
	96	u32 *end = priv->fb + priv->fb_size;
	97
	98	while (ppix < end)
	99	*ppix++ = priv->colour_bg;
	100	} else {
	101	memset(priv->fb, priv->colour_bg, priv->fb_size);
	102	}
	103
	104	return 0;
	105	}
	106
	107	/* Flush video activity to the caches */
	108	void video_sync(struct udevice *vid)
	109	{
	110	/*
	111	* flush_dcache_range() is declared in common.h but it seems that some
	112	* architectures do not actually implement it. Is there a way to find
	113	* out whether it exists? For now, ARM is safe.
	114	*/
	115	#if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
	116	struct video_priv *priv = dev_get_uclass_priv(vid);
	117
	118	if (priv->flush_dcache) {
	119	flush_dcache_range((ulong)priv->fb,
	120	(ulong)priv->fb + priv->fb_size);
	121	}
	122	#elif defined(CONFIG_VIDEO_SANDBOX_SDL)
	123	struct video_priv *priv = dev_get_uclass_priv(vid);
124	static ulong last_sync;
125
126	if (get_timer(last_sync) > 10) {
127	sandbox_sdl_sync(priv->fb);
128	last_sync = get_timer(0);
129	}
130	#endif
131	}
132
133	void video_sync_all(void)
134	{
135	struct udevice *dev;
136
137	for (uclass_find_first_device(UCLASS_VIDEO, &dev);
138	dev;
139	uclass_find_next_device(&dev)) {
140	if (device_active(dev))
141	video_sync(dev);
142	}
143	}
144
145	int video_get_xsize(struct udevice *dev)
146	{
147	struct video_priv *priv = dev_get_uclass_priv(dev);
148
149	return priv->xsize;
150	}
151
152	int video_get_ysize(struct udevice *dev)
153	{
154	struct video_priv *priv = dev_get_uclass_priv(dev);
155
156	return priv->ysize;
157	}
158
159	/* Set up the colour map */
160	static int video_pre_probe(struct udevice *dev)
161	{
162	struct video_priv *priv = dev_get_uclass_priv(dev);
163
164	priv->cmap = calloc(256, sizeof(ushort));
165	if (!priv->cmap)
166	return -ENOMEM;
167
168	return 0;
169	}
170
171	static int video_pre_remove(struct udevice *dev)
172	{
173	struct video_priv *priv = dev_get_uclass_priv(dev);
174
175	free(priv->cmap);
176
177	return 0;
178	}
179
180	/* Set up the display ready for use */
181	static int video_post_probe(struct udevice *dev)
182	{
183	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
184	struct video_priv *priv = dev_get_uclass_priv(dev);
185	char name[30], drv[15], *str;
826f35f9	186	const char *drv_name = drv;
1acafc73 SG	187	struct udevice *cons;
	188	int ret;
	189
	190	/* Set up the line and display size */
	191	priv->fb = map_sysmem(plat->base, plat->size);
	192	priv->line_length = priv->xsize * VNBYTES(priv->bpix);
	193	priv->fb_size = priv->line_length * priv->ysize;
	194
	195	/* Set up colours - we could in future support other colours */
	196	#ifdef CONFIG_SYS_WHITE_ON_BLACK
	197	priv->colour_fg = 0xffffff;
	198	#else
	199	priv->colour_bg = 0xffffff;
	200	#endif
	201	video_clear(dev);
	202
83510766	203	/*
826f35f9	204	* Create a text console device. For now we always do this, although
83510766	205	* it might be useful to support only bitmap drawing on the device
826f35f9 SG	206	* for boards that don't need to display text. We create a TrueType
	207	* console if enabled, a rotated console if the video driver requests
	208	* it, otherwise a normal console.
	209	*
	210	* The console can be override by setting vidconsole_drv_name before
	211	* probing this video driver, or in the probe() method.
	212	*
	213	* TrueType does not support rotation at present so fall back to the
	214	* rotated console in that case.
83510766	215	*/
826f35f9	216	if (!priv->rot && IS_ENABLED(CONFIG_CONSOLE_TRUETYPE)) {
a29b0120 SG	217	snprintf(name, sizeof(name), "%s.vidconsole_tt", dev->name);
	218	strcpy(drv, "vidconsole_tt");
	219	} else {
	220	snprintf(name, sizeof(name), "%s.vidconsole%d", dev->name,
	221	priv->rot);
	222	snprintf(drv, sizeof(drv), "vidconsole%d", priv->rot);
	223	}
	224
83510766 SG	225	str = strdup(name);
	226	if (!str)
	227	return -ENOMEM;
826f35f9 SG	228	if (priv->vidconsole_drv_name)
	229	drv_name = priv->vidconsole_drv_name;
	230	ret = device_bind_driver(dev, drv_name, str, &cons);
83510766 SG	231	if (ret) {
	232	debug("%s: Cannot bind console driver\n", __func__);
	233	return ret;
	234	}
826f35f9	235
83510766 SG	236	ret = device_probe(cons);
	237	if (ret) {
	238	debug("%s: Cannot probe console driver\n", __func__);
	239	return ret;
	240	}
	241
1acafc73 SG	242	return 0;
	243	};
	244
	245	/* Post-relocation, allocate memory for the frame buffer */
	246	static int video_post_bind(struct udevice *dev)
	247	{
	248	ulong addr = gd->video_top;
	249	ulong size;
	250
	251	/* Before relocation there is nothing to do here */
	252	if ((!gd->flags & GD_FLG_RELOC))
	253	return 0;
	254	size = alloc_fb(dev, &addr);
	255	if (addr < gd->video_bottom) {
	256	/* Device tree node may need the 'u-boot,dm-pre-reloc' tag */
	257	printf("Video device '%s' cannot allocate frame buffer memory -ensure the device is set up before relocation\n",
	258	dev->name);
	259	return -ENOSPC;
	260	}
	261	debug("%s: Claiming %lx bytes at %lx for video device '%s'\n",
	262	__func__, size, addr, dev->name);
	263	gd->video_bottom = addr;
	264
	265	return 0;
	266	}
	267
	268	UCLASS_DRIVER(video) = {
	269	.id = UCLASS_VIDEO,
	270	.name = "video",
	271	.flags = DM_UC_FLAG_SEQ_ALIAS,
	272	.post_bind = video_post_bind,
	273	.pre_probe = video_pre_probe,
	274	.post_probe = video_post_probe,
	275	.pre_remove = video_pre_remove,
	276	.per_device_auto_alloc_size = sizeof(struct video_priv),
	277	.per_device_platdata_auto_alloc_size = sizeof(struct video_uc_platdata),
	278	};