1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Filename: cfag12864b.h
5 * Description: cfag12864b LCD driver header
7 * Author: Copyright (C) Miguel Ojeda <ojeda@kernel.org>
11 #ifndef _CFAG12864B_H_
12 #define _CFAG12864B_H_
14 #define CFAG12864B_WIDTH (128)
15 #define CFAG12864B_HEIGHT (64)
16 #define CFAG12864B_CONTROLLERS (2)
17 #define CFAG12864B_PAGES (8)
18 #define CFAG12864B_ADDRESSES (64)
19 #define CFAG12864B_SIZE ((CFAG12864B_CONTROLLERS) * \
20 (CFAG12864B_PAGES) * \
21 (CFAG12864B_ADDRESSES))
24 * The driver will blit this buffer to the LCD
26 * Its size is CFAG12864B_SIZE.
28 extern unsigned char * cfag12864b_buffer;
31 * Get the refresh rate of the LCD
33 * Returns the refresh rate (hertz).
35 extern unsigned int cfag12864b_getrate(void);
40 * Returns 0 if successful (anyone was using it),
41 * or != 0 if failed (someone is using it).
43 extern unsigned char cfag12864b_enable(void);
48 * You should call this only when you finish using the LCD.
50 extern void cfag12864b_disable(void);
53 * Is enabled refreshing? (is anyone using the module?)
55 * Returns 0 if refreshing is not enabled (anyone is using it),
56 * or != 0 if refreshing is enabled (someone is using it).
58 * Useful for buffer read-only modules.
60 extern unsigned char cfag12864b_isenabled(void);
63 * Is the module inited?
65 extern unsigned char cfag12864b_isinited(void);
67 #endif /* _CFAG12864B_H_ */