fdt: Remove fdtdec_decode_region() function
[J-u-boot.git] / drivers / video / video-uclass.c
CommitLineData
83d290c5 1// SPDX-License-Identifier: GPL-2.0+
1acafc73
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2/*
3 * Copyright (c) 2015 Google, Inc
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4 */
5
6#include <common.h>
7#include <dm.h>
8#include <mapmem.h>
9#include <stdio_dev.h>
10#include <video.h>
11#include <video_console.h>
12#include <dm/lists.h>
13#include <dm/device-internal.h>
14#include <dm/uclass-internal.h>
15#ifdef CONFIG_SANDBOX
16#include <asm/sdl.h>
17#endif
18
19/*
20 * Theory of operation:
21 *
22 * Before relocation each device is bound. The driver for each device must
23 * set the @align and @size values in struct video_uc_platdata. This
24 * information represents the requires size and alignment of the frame buffer
25 * for the device. The values can be an over-estimate but cannot be too
26 * small. The actual values will be suppled (in the same manner) by the bind()
27 * method after relocation.
28 *
29 * This information is then picked up by video_reserve() which works out how
30 * much memory is needed for all devices. This is allocated between
31 * gd->video_bottom and gd->video_top.
32 *
33 * After relocation the same process occurs. The driver supplies the same
34 * @size and @align information and this time video_post_bind() checks that
35 * the drivers does not overflow the allocated memory.
36 *
37 * The frame buffer address is actually set (to plat->base) in
38 * video_post_probe(). This function also clears the frame buffer and
39 * allocates a suitable text console device. This can then be used to write
40 * text to the video device.
41 */
42DECLARE_GLOBAL_DATA_PTR;
43
68dcdc99
SG
44void video_set_flush_dcache(struct udevice *dev, bool flush)
45{
46 struct video_priv *priv = dev_get_uclass_priv(dev);
47
48 priv->flush_dcache = flush;
49}
50
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51static ulong alloc_fb(struct udevice *dev, ulong *addrp)
52{
53 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
54 ulong base, align, size;
55
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56 if (!plat->size)
57 return 0;
58
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59 align = plat->align ? plat->align : 1 << 20;
60 base = *addrp - plat->size;
61 base &= ~(align - 1);
62 plat->base = base;
63 size = *addrp - base;
64 *addrp = base;
65
66 return size;
67}
68
69int video_reserve(ulong *addrp)
70{
71 struct udevice *dev;
72 ulong size;
73
74 gd->video_top = *addrp;
75 for (uclass_find_first_device(UCLASS_VIDEO, &dev);
76 dev;
77 uclass_find_next_device(&dev)) {
78 size = alloc_fb(dev, addrp);
79 debug("%s: Reserving %lx bytes at %lx for video device '%s'\n",
80 __func__, size, *addrp, dev->name);
81 }
82 gd->video_bottom = *addrp;
83 debug("Video frame buffers from %lx to %lx\n", gd->video_bottom,
84 gd->video_top);
85
86 return 0;
87}
88
a085aa1f 89void video_clear(struct udevice *dev)
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90{
91 struct video_priv *priv = dev_get_uclass_priv(dev);
92
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HS
93 switch (priv->bpix) {
94 case VIDEO_BPP16: {
95 u16 *ppix = priv->fb;
96 u16 *end = priv->fb + priv->fb_size;
97
98 while (ppix < end)
99 *ppix++ = priv->colour_bg;
100 break;
101 }
102 case VIDEO_BPP32: {
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103 u32 *ppix = priv->fb;
104 u32 *end = priv->fb + priv->fb_size;
105
106 while (ppix < end)
107 *ppix++ = priv->colour_bg;
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HS
108 break;
109 }
110 default:
1acafc73 111 memset(priv->fb, priv->colour_bg, priv->fb_size);
d7a75d3c 112 break;
1acafc73 113 }
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114}
115
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116void video_set_default_colors(struct video_priv *priv)
117{
118#ifdef CONFIG_SYS_WHITE_ON_BLACK
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HS
119 /* White is used when switching to bold, use light gray here */
120 priv->fg_col_idx = VID_LIGHT_GRAY;
121 priv->colour_fg = vid_console_color(priv, VID_LIGHT_GRAY);
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122 priv->colour_bg = vid_console_color(priv, VID_BLACK);
123#else
9ffa4d12 124 priv->fg_col_idx = VID_BLACK;
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125 priv->colour_fg = vid_console_color(priv, VID_BLACK);
126 priv->colour_bg = vid_console_color(priv, VID_WHITE);
127#endif
128}
129
1acafc73 130/* Flush video activity to the caches */
55d39911 131void video_sync(struct udevice *vid, bool force)
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132{
133 /*
134 * flush_dcache_range() is declared in common.h but it seems that some
135 * architectures do not actually implement it. Is there a way to find
136 * out whether it exists? For now, ARM is safe.
137 */
138#if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
139 struct video_priv *priv = dev_get_uclass_priv(vid);
140
141 if (priv->flush_dcache) {
142 flush_dcache_range((ulong)priv->fb,
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SG
143 ALIGN((ulong)priv->fb + priv->fb_size,
144 CONFIG_SYS_CACHELINE_SIZE));
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145 }
146#elif defined(CONFIG_VIDEO_SANDBOX_SDL)
147 struct video_priv *priv = dev_get_uclass_priv(vid);
148 static ulong last_sync;
149
55d39911 150 if (force || get_timer(last_sync) > 10) {
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SG
151 sandbox_sdl_sync(priv->fb);
152 last_sync = get_timer(0);
153 }
154#endif
155}
156
157void video_sync_all(void)
158{
159 struct udevice *dev;
160
161 for (uclass_find_first_device(UCLASS_VIDEO, &dev);
162 dev;
163 uclass_find_next_device(&dev)) {
164 if (device_active(dev))
55d39911 165 video_sync(dev, true);
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166 }
167}
168
169int video_get_xsize(struct udevice *dev)
170{
171 struct video_priv *priv = dev_get_uclass_priv(dev);
172
173 return priv->xsize;
174}
175
176int video_get_ysize(struct udevice *dev)
177{
178 struct video_priv *priv = dev_get_uclass_priv(dev);
179
180 return priv->ysize;
181}
182
183/* Set up the colour map */
184static int video_pre_probe(struct udevice *dev)
185{
186 struct video_priv *priv = dev_get_uclass_priv(dev);
187
188 priv->cmap = calloc(256, sizeof(ushort));
189 if (!priv->cmap)
190 return -ENOMEM;
191
192 return 0;
193}
194
195static int video_pre_remove(struct udevice *dev)
196{
197 struct video_priv *priv = dev_get_uclass_priv(dev);
198
199 free(priv->cmap);
200
201 return 0;
202}
203
204/* Set up the display ready for use */
205static int video_post_probe(struct udevice *dev)
206{
207 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
208 struct video_priv *priv = dev_get_uclass_priv(dev);
209 char name[30], drv[15], *str;
826f35f9 210 const char *drv_name = drv;
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211 struct udevice *cons;
212 int ret;
213
214 /* Set up the line and display size */
215 priv->fb = map_sysmem(plat->base, plat->size);
216 priv->line_length = priv->xsize * VNBYTES(priv->bpix);
217 priv->fb_size = priv->line_length * priv->ysize;
218
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HS
219 /* Set up colors */
220 video_set_default_colors(priv);
8ef05352
RC
221
222 if (!CONFIG_IS_ENABLED(NO_FB_CLEAR))
223 video_clear(dev);
1acafc73 224
83510766 225 /*
826f35f9 226 * Create a text console device. For now we always do this, although
83510766 227 * it might be useful to support only bitmap drawing on the device
826f35f9
SG
228 * for boards that don't need to display text. We create a TrueType
229 * console if enabled, a rotated console if the video driver requests
230 * it, otherwise a normal console.
231 *
232 * The console can be override by setting vidconsole_drv_name before
233 * probing this video driver, or in the probe() method.
234 *
235 * TrueType does not support rotation at present so fall back to the
236 * rotated console in that case.
83510766 237 */
826f35f9 238 if (!priv->rot && IS_ENABLED(CONFIG_CONSOLE_TRUETYPE)) {
a29b0120
SG
239 snprintf(name, sizeof(name), "%s.vidconsole_tt", dev->name);
240 strcpy(drv, "vidconsole_tt");
241 } else {
242 snprintf(name, sizeof(name), "%s.vidconsole%d", dev->name,
243 priv->rot);
244 snprintf(drv, sizeof(drv), "vidconsole%d", priv->rot);
245 }
246
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247 str = strdup(name);
248 if (!str)
249 return -ENOMEM;
826f35f9
SG
250 if (priv->vidconsole_drv_name)
251 drv_name = priv->vidconsole_drv_name;
252 ret = device_bind_driver(dev, drv_name, str, &cons);
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253 if (ret) {
254 debug("%s: Cannot bind console driver\n", __func__);
255 return ret;
256 }
826f35f9 257
83510766
SG
258 ret = device_probe(cons);
259 if (ret) {
260 debug("%s: Cannot probe console driver\n", __func__);
261 return ret;
262 }
263
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264 return 0;
265};
266
267/* Post-relocation, allocate memory for the frame buffer */
268static int video_post_bind(struct udevice *dev)
269{
270 ulong addr = gd->video_top;
271 ulong size;
272
273 /* Before relocation there is nothing to do here */
75164181 274 if (!(gd->flags & GD_FLG_RELOC))
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275 return 0;
276 size = alloc_fb(dev, &addr);
277 if (addr < gd->video_bottom) {
278 /* Device tree node may need the 'u-boot,dm-pre-reloc' tag */
279 printf("Video device '%s' cannot allocate frame buffer memory -ensure the device is set up before relocation\n",
280 dev->name);
281 return -ENOSPC;
282 }
283 debug("%s: Claiming %lx bytes at %lx for video device '%s'\n",
284 __func__, size, addr, dev->name);
285 gd->video_bottom = addr;
286
287 return 0;
288}
289
290UCLASS_DRIVER(video) = {
291 .id = UCLASS_VIDEO,
292 .name = "video",
293 .flags = DM_UC_FLAG_SEQ_ALIAS,
294 .post_bind = video_post_bind,
295 .pre_probe = video_pre_probe,
296 .post_probe = video_post_probe,
297 .pre_remove = video_pre_remove,
298 .per_device_auto_alloc_size = sizeof(struct video_priv),
299 .per_device_platdata_auto_alloc_size = sizeof(struct video_uc_platdata),
300};
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