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1 /*
2  * Video uclass and legacy implementation
3  *
4  * Copyright (c) 2015 Google, Inc
5  *
6  * MPC823 Video Controller
7  * =======================
8  * (C) 2000 by Paolo Scaffardi (arsenio@tin.it)
9  * AIRVENT SAM s.p.a - RIMINI(ITALY)
10  *
11  */
12 
13 #ifndef _VIDEO_H_
14 #define _VIDEO_H_
15 
16 #ifdef CONFIG_DM_VIDEO
17 
18 #include <stdio_dev.h>
19 
20 struct video_uc_platdata {
21 	uint align;
22 	uint size;
23 	ulong base;
24 };
25 
26 enum video_polarity {
27 	VIDEO_ACTIVE_HIGH,	/* Pins are active high */
28 	VIDEO_ACTIVE_LOW,	/* Pins are active low */
29 };
30 
31 /*
32  * Bits per pixel selector. Each value n is such that the bits-per-pixel is
33  * 2 ^ n
34  */
35 enum video_log2_bpp {
36 	VIDEO_BPP1	= 0,
37 	VIDEO_BPP2,
38 	VIDEO_BPP4,
39 	VIDEO_BPP8,
40 	VIDEO_BPP16,
41 	VIDEO_BPP32,
42 };
43 
44 /*
45  * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
46  * brackets to allow multiplication by fractional pixels.
47  */
48 #define VNBYTES(bpix)	(1 << (bpix)) / 8
49 
50 #define VNBITS(bpix)	(1 << (bpix))
51 
52 /**
53  * struct video_priv - Device information used by the video uclass
54  *
55  * @xsize:	Number of pixel columns (e.g. 1366)
56  * @ysize:	Number of pixels rows (e.g.. 768)
57  * @rot:	Display rotation (0=none, 1=90 degrees clockwise, etc.)
58  * @bpix:	Encoded bits per pixel
59  * @vidconsole_drv_name:	Driver to use for the text console, NULL to
60  *		select automatically
61  * @font_size:	Font size in pixels (0 to use a default value)
62  * @fb:		Frame buffer
63  * @fb_size:	Frame buffer size
64  * @line_length:	Length of each frame buffer line, in bytes
65  * @colour_fg:	Foreground colour (pixel value)
66  * @colour_bg:	Background colour (pixel value)
67  * @flush_dcache:	true to enable flushing of the data cache after
68  *		the LCD is updated
69  * @cmap:	Colour map for 8-bit-per-pixel displays
70  * @fg_col_idx:	Foreground color code (bit 3 = bold, bit 0-2 = color)
71  */
72 struct video_priv {
73 	/* Things set up by the driver: */
74 	ushort xsize;
75 	ushort ysize;
76 	ushort rot;
77 	enum video_log2_bpp bpix;
78 	const char *vidconsole_drv_name;
79 	int font_size;
80 
81 	/*
82 	 * Things that are private to the uclass: don't use these in the
83 	 * driver
84 	 */
85 	void *fb;
86 	int fb_size;
87 	int line_length;
88 	u32 colour_fg;
89 	u32 colour_bg;
90 	bool flush_dcache;
91 	ushort *cmap;
92 	u8 fg_col_idx;
93 };
94 
95 /* Placeholder - there are no video operations at present */
96 struct video_ops {
97 };
98 
99 #define video_get_ops(dev)        ((struct video_ops *)(dev)->driver->ops)
100 
101 /**
102  * video_reserve() - Reserve frame-buffer memory for video devices
103  *
104  * Note: This function is for internal use.
105  *
106  * This uses the uclass platdata's @size and @align members to figure out
107  * a size and position for each frame buffer as part of the pre-relocation
108  * process of determining the post-relocation memory layout.
109  *
110  * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
111  * is set to the final value.
112  *
113  * @addrp:	On entry, the top of available memory. On exit, the new top,
114  *		after allocating the required memory.
115  * @return 0
116  */
117 int video_reserve(ulong *addrp);
118 
119 /**
120  * video_clear() - Clear a device's frame buffer to background color.
121  *
122  * @dev:	Device to clear
123  */
124 void video_clear(struct udevice *dev);
125 
126 /**
127  * video_sync() - Sync a device's frame buffer with its hardware
128  *
129  * Some frame buffers are cached or have a secondary frame buffer. This
130  * function syncs these up so that the current contents of the U-Boot frame
131  * buffer are displayed to the user.
132  *
133  * @dev:	Device to sync
134  */
135 void video_sync(struct udevice *vid);
136 
137 /**
138  * video_sync_all() - Sync all devices' frame buffers with there hardware
139  *
140  * This calls video_sync() on all active video devices.
141  */
142 void video_sync_all(void);
143 
144 /**
145  * video_bmp_display() - Display a BMP file
146  *
147  * @dev:	Device to display the bitmap on
148  * @bmp_image:	Address of bitmap image to display
149  * @x:		X position in pixels from the left
150  * @y:		Y position in pixels from the top
151  * @align:	true to adjust the coordinates to centre the image. If false
152  *		the coordinates are used as is. If true:
153  *
154  *		- if a coordinate is 0x7fff then the image will be centred in
155  *		  that direction
156  *		- if a coordinate is -ve then it will be offset to the
157  *		  left/top of the centre by that many pixels
158  *		- if a coordinate is positive it will be used unchnaged.
159  * @return 0 if OK, -ve on error
160  */
161 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
162 		      bool align);
163 
164 /**
165  * video_get_xsize() - Get the width of the display in pixels
166  *
167  * @dev:	Device to check
168  * @return device frame buffer width in pixels
169  */
170 int video_get_xsize(struct udevice *dev);
171 
172 /**
173  * video_get_ysize() - Get the height of the display in pixels
174  *
175  * @dev:	Device to check
176  * @return device frame buffer height in pixels
177  */
178 int video_get_ysize(struct udevice *dev);
179 
180 /**
181  * Set whether we need to flush the dcache when changing the image. This
182  * defaults to off.
183  *
184  * @param flush		non-zero to flush cache after update, 0 to skip
185  */
186 void video_set_flush_dcache(struct udevice *dev, bool flush);
187 
188 /**
189  * Set default colors and attributes
190  *
191  * @priv	device information
192  */
193 void video_set_default_colors(struct video_priv *priv);
194 
195 #endif /* CONFIG_DM_VIDEO */
196 
197 #ifndef CONFIG_DM_VIDEO
198 
199 /* Video functions */
200 
201 struct stdio_dev;
202 
203 int	video_init(void *videobase);
204 void	video_putc(struct stdio_dev *dev, const char c);
205 void	video_puts(struct stdio_dev *dev, const char *s);
206 
207 /**
208  * Display a BMP format bitmap on the screen
209  *
210  * @param bmp_image	Address of BMP image
211  * @param x		X position to draw image
212  * @param y		Y position to draw image
213  */
214 int video_display_bitmap(ulong bmp_image, int x, int y);
215 
216 /**
217  * Get the width of the screen in pixels
218  *
219  * @return width of screen in pixels
220  */
221 int video_get_pixel_width(void);
222 
223 /**
224  * Get the height of the screen in pixels
225  *
226  * @return height of screen in pixels
227  */
228 int video_get_pixel_height(void);
229 
230 /**
231  * Get the number of text lines/rows on the screen
232  *
233  * @return number of rows
234  */
235 int video_get_screen_rows(void);
236 
237 /**
238  * Get the number of text columns on the screen
239  *
240  * @return number of columns
241  */
242 int video_get_screen_columns(void);
243 
244 /**
245  * Set the position of the text cursor
246  *
247  * @param col	Column to place cursor (0 = left side)
248  * @param row	Row to place cursor (0 = top line)
249  */
250 void video_position_cursor(unsigned col, unsigned row);
251 
252 /* Clear the display */
253 void video_clear(void);
254 
255 #if defined(CONFIG_FORMIKE)
256 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs,
257 	unsigned int max_hz, unsigned int spi_mode);
258 #endif
259 #if defined(CONFIG_LG4573)
260 int lg4573_spi_startup(unsigned int bus, unsigned int cs,
261 	unsigned int max_hz, unsigned int spi_mode);
262 #endif
263 
264 /*
265  * video_get_info_str() - obtain a board string: type, speed, etc.
266  *
267  * This is called if CONFIG_CONSOLE_EXTRA_INFO is enabled.
268  *
269  * line_number:	location to place info string beside logo
270  * info:	buffer for info string (empty if nothing to display on this
271  * line)
272  */
273 void video_get_info_str(int line_number, char *info);
274 
275 #endif /* CONFIG_DM_VIDEO */
276 
277 #endif
278