include/linux/cfag12864b.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  *    Filename: cfag12864b.h
0004  *     Version: 0.1.0
0005  * Description: cfag12864b LCD driver header
0006  *
0007  *      Author: Copyright (C) Miguel Ojeda <ojeda@kernel.org>
0008  *        Date: 2006-10-12
0009  */
0010
0011 #ifndef _CFAG12864B_H_
0012 #define _CFAG12864B_H_
0013
0014 #define CFAG12864B_WIDTH    (128)
0015 #define CFAG12864B_HEIGHT   (64)
0016 #define CFAG12864B_CONTROLLERS  (2)
0017 #define CFAG12864B_PAGES    (8)
0018 #define CFAG12864B_ADDRESSES    (64)
0019 #define CFAG12864B_SIZE     ((CFAG12864B_CONTROLLERS) * \
0020                 (CFAG12864B_PAGES) * \
0021                 (CFAG12864B_ADDRESSES))
0022
0023 /*
0024  * The driver will blit this buffer to the LCD
0025  *
0026  * Its size is CFAG12864B_SIZE.
0027  */
0028 extern unsigned char * cfag12864b_buffer;
0029
0030 /*
0031  * Get the refresh rate of the LCD
0032  *
0033  * Returns the refresh rate (hertz).
0034  */
0035 extern unsigned int cfag12864b_getrate(void);
0036
0037 /*
0038  * Enable refreshing
0039  *
0040  * Returns 0 if successful (anyone was using it),
0041  * or != 0 if failed (someone is using it).
0042  */
0043 extern unsigned char cfag12864b_enable(void);
0044
0045 /*
0046  * Disable refreshing
0047  *
0048  * You should call this only when you finish using the LCD.
0049  */
0050 extern void cfag12864b_disable(void);
0051
0052 /*
0053  * Is enabled refreshing? (is anyone using the module?)
0054  *
0055  * Returns 0 if refreshing is not enabled (anyone is using it),
0056  * or != 0 if refreshing is enabled (someone is using it).
0057  *
0058  * Useful for buffer read-only modules.
0059  */
0060 extern unsigned char cfag12864b_isenabled(void);
0061
0062 /*
0063  * Is the module inited?
0064  */
0065 extern unsigned char cfag12864b_isinited(void);
0066
0067 #endif /* _CFAG12864B_H_ */
0068