xref: /openbmc/u-boot/lib/efi_loader/efi_gop.c (revision 85231c08)
1 /*
2  *  EFI application disk support
3  *
4  *  Copyright (c) 2016 Alexander Graf
5  *
6  *  SPDX-License-Identifier:     GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <dm.h>
11 #include <efi_loader.h>
12 #include <inttypes.h>
13 #include <lcd.h>
14 #include <malloc.h>
15 #include <video.h>
16 
17 DECLARE_GLOBAL_DATA_PTR;
18 
19 static const efi_guid_t efi_gop_guid = EFI_GOP_GUID;
20 
21 struct efi_gop_obj {
22 	/* Generic EFI object parent class data */
23 	struct efi_object parent;
24 	/* EFI Interface callback struct for gop */
25 	struct efi_gop ops;
26 	/* The only mode we support */
27 	struct efi_gop_mode_info info;
28 	struct efi_gop_mode mode;
29 	/* Fields we only have acces to during init */
30 	u32 bpix;
31 	void *fb;
32 };
33 
34 static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
35 					  efi_uintn_t *size_of_info,
36 					  struct efi_gop_mode_info **info)
37 {
38 	struct efi_gop_obj *gopobj;
39 
40 	EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
41 
42 	gopobj = container_of(this, struct efi_gop_obj, ops);
43 	*size_of_info = sizeof(gopobj->info);
44 	*info = &gopobj->info;
45 
46 	return EFI_EXIT(EFI_SUCCESS);
47 }
48 
49 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
50 {
51 	EFI_ENTRY("%p, %x", this, mode_number);
52 
53 	if (mode_number != 0)
54 		return EFI_EXIT(EFI_INVALID_PARAMETER);
55 
56 	return EFI_EXIT(EFI_SUCCESS);
57 }
58 
59 efi_status_t EFIAPI gop_blt(struct efi_gop *this, void *buffer,
60 			    u32 operation, efi_uintn_t sx,
61 			    efi_uintn_t sy, efi_uintn_t dx,
62 			    efi_uintn_t dy, efi_uintn_t width,
63 			    efi_uintn_t height, efi_uintn_t delta)
64 {
65 	struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
66 	int i, j, line_len16, line_len32;
67 	void *fb;
68 
69 	EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
70 		  buffer, operation, sx, sy, dx, dy, width, height, delta);
71 
72 	if (operation != EFI_BLT_BUFFER_TO_VIDEO)
73 		return EFI_EXIT(EFI_INVALID_PARAMETER);
74 
75 	fb = gopobj->fb;
76 	line_len16 = gopobj->info.width * sizeof(u16);
77 	line_len32 = gopobj->info.width * sizeof(u32);
78 
79 	/* Copy the contents line by line */
80 
81 	switch (gopobj->bpix) {
82 #ifdef CONFIG_DM_VIDEO
83 	case VIDEO_BPP32:
84 #else
85 	case LCD_COLOR32:
86 #endif
87 		for (i = 0; i < height; i++) {
88 			u32 *dest = fb + ((i + dy)  * line_len32) +
89 					 (dx * sizeof(u32));
90 			u32 *src = buffer + ((i + sy)  * line_len32) +
91 					 (sx * sizeof(u32));
92 
93 			/* Same color format, just memcpy */
94 			memcpy(dest, src, width * sizeof(u32));
95 		}
96 		break;
97 #ifdef CONFIG_DM_VIDEO
98 	case VIDEO_BPP16:
99 #else
100 	case LCD_COLOR16:
101 #endif
102 		for (i = 0; i < height; i++) {
103 			u16 *dest = fb + ((i + dy)  * line_len16) +
104 					 (dx * sizeof(u16));
105 			u32 *src = buffer + ((i + sy)  * line_len32) +
106 					 (sx * sizeof(u32));
107 
108 			/* Convert from rgb888 to rgb565 */
109 			for (j = 0; j < width; j++) {
110 				u32 rgb888 = src[j];
111 				dest[j] = ((((rgb888 >> (16 + 3)) & 0x1f) << 11) |
112 					   (((rgb888 >> (8 + 2)) & 0x3f) << 5) |
113 					   (((rgb888 >> (0 + 3)) & 0x1f) << 0));
114 			}
115 		}
116 		break;
117 	}
118 
119 #ifdef CONFIG_DM_VIDEO
120 	video_sync_all();
121 #else
122 	lcd_sync();
123 #endif
124 
125 	return EFI_EXIT(EFI_SUCCESS);
126 }
127 
128 /* This gets called from do_bootefi_exec(). */
129 int efi_gop_register(void)
130 {
131 	struct efi_gop_obj *gopobj;
132 	u32 bpix, col, row;
133 	u64 fb_base, fb_size;
134 	void *fb;
135 	efi_status_t ret;
136 
137 #ifdef CONFIG_DM_VIDEO
138 	struct udevice *vdev;
139 
140 	/* We only support a single video output device for now */
141 	if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev)
142 		return -1;
143 
144 	struct video_priv *priv = dev_get_uclass_priv(vdev);
145 	bpix = priv->bpix;
146 	col = video_get_xsize(vdev);
147 	row = video_get_ysize(vdev);
148 	fb_base = (uintptr_t)priv->fb;
149 	fb_size = priv->fb_size;
150 	fb = priv->fb;
151 #else
152 	int line_len;
153 
154 	bpix = panel_info.vl_bpix;
155 	col = panel_info.vl_col;
156 	row = panel_info.vl_row;
157 	fb_base = gd->fb_base;
158 	fb_size = lcd_get_size(&line_len);
159 	fb = (void*)gd->fb_base;
160 #endif
161 
162 	switch (bpix) {
163 #ifdef CONFIG_DM_VIDEO
164 	case VIDEO_BPP16:
165 	case VIDEO_BPP32:
166 #else
167 	case LCD_COLOR32:
168 	case LCD_COLOR16:
169 #endif
170 		break;
171 	default:
172 		/* So far, we only work in 16 or 32 bit mode */
173 		return -1;
174 	}
175 
176 	gopobj = calloc(1, sizeof(*gopobj));
177 	if (!gopobj) {
178 		printf("ERROR: Out of memory\n");
179 		return 1;
180 	}
181 
182 	/* Hook up to the device list */
183 	efi_add_handle(&gopobj->parent);
184 
185 	/* Fill in object data */
186 	ret = efi_add_protocol(gopobj->parent.handle, &efi_gop_guid,
187 			       &gopobj->ops);
188 	if (ret != EFI_SUCCESS) {
189 		printf("ERROR: Out of memory\n");
190 		return 1;
191 	}
192 	gopobj->ops.query_mode = gop_query_mode;
193 	gopobj->ops.set_mode = gop_set_mode;
194 	gopobj->ops.blt = gop_blt;
195 	gopobj->ops.mode = &gopobj->mode;
196 
197 	gopobj->mode.max_mode = 1;
198 	gopobj->mode.info = &gopobj->info;
199 	gopobj->mode.info_size = sizeof(gopobj->info);
200 
201 #ifdef CONFIG_DM_VIDEO
202 	if (bpix == VIDEO_BPP32) {
203 #else
204 	if (bpix == LCD_COLOR32) {
205 #endif
206 		/* With 32bit color space we can directly expose the fb */
207 		gopobj->mode.fb_base = fb_base;
208 		gopobj->mode.fb_size = fb_size;
209 	}
210 
211 	gopobj->info.version = 0;
212 	gopobj->info.width = col;
213 	gopobj->info.height = row;
214 	gopobj->info.pixel_format = EFI_GOT_RGBA8;
215 	gopobj->info.pixels_per_scanline = col;
216 
217 	gopobj->bpix = bpix;
218 	gopobj->fb = fb;
219 
220 	return 0;
221 }
222