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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1acafc73 SG |
2 | /* |
3 | * Copyright (c) 2015 Google, Inc | |
1acafc73 SG |
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 | */ | |
42 | DECLARE_GLOBAL_DATA_PTR; | |
43 | ||
68dcdc99 SG |
44 | void 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 | ||
1acafc73 SG |
51 | static 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 | ||
3968398e BM |
56 | if (!plat->size) |
57 | return 0; | |
58 | ||
1acafc73 SG |
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 | ||
69 | int 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 | 89 | void video_clear(struct udevice *dev) |
1acafc73 SG |
90 | { |
91 | struct video_priv *priv = dev_get_uclass_priv(dev); | |
92 | ||
d7a75d3c 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: { | |
1acafc73 SG |
103 | u32 *ppix = priv->fb; |
104 | u32 *end = priv->fb + priv->fb_size; | |
105 | ||
106 | while (ppix < end) | |
107 | *ppix++ = priv->colour_bg; | |
d7a75d3c HS |
108 | break; |
109 | } | |
110 | default: | |
1acafc73 | 111 | memset(priv->fb, priv->colour_bg, priv->fb_size); |
d7a75d3c | 112 | break; |
1acafc73 | 113 | } |
1acafc73 SG |
114 | } |
115 | ||
5c30fbb8 HS |
116 | void video_set_default_colors(struct video_priv *priv) |
117 | { | |
118 | #ifdef CONFIG_SYS_WHITE_ON_BLACK | |
9ffa4d12 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); | |
5c30fbb8 HS |
122 | priv->colour_bg = vid_console_color(priv, VID_BLACK); |
123 | #else | |
9ffa4d12 | 124 | priv->fg_col_idx = VID_BLACK; |
5c30fbb8 HS |
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 | 131 | void video_sync(struct udevice *vid, bool force) |
1acafc73 SG |
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, | |
7981394e SG |
143 | ALIGN((ulong)priv->fb + priv->fb_size, |
144 | CONFIG_SYS_CACHELINE_SIZE)); | |
1acafc73 SG |
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) { |
1acafc73 SG |
151 | sandbox_sdl_sync(priv->fb); |
152 | last_sync = get_timer(0); | |
153 | } | |
154 | #endif | |
155 | } | |
156 | ||
157 | void 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); |
1acafc73 SG |
166 | } |
167 | } | |
168 | ||
169 | int video_get_xsize(struct udevice *dev) | |
170 | { | |
171 | struct video_priv *priv = dev_get_uclass_priv(dev); | |
172 | ||
173 | return priv->xsize; | |
174 | } | |
175 | ||
176 | int 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 */ | |
184 | static 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 | ||
195 | static 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 */ | |
205 | static 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; |
1acafc73 SG |
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 | ||
5c30fbb8 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 | ||
83510766 SG |
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); | |
83510766 SG |
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 | ||
1acafc73 SG |
264 | return 0; |
265 | }; | |
266 | ||
267 | /* Post-relocation, allocate memory for the frame buffer */ | |
268 | static 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)) |
1acafc73 SG |
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 | ||
290 | UCLASS_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 | }; |