1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Filename: cfag12864b.h 4 * Version: 0.1.0 5 * Description: cfag12864b LCD driver header 6 * 7 * Author: Copyright (C) Miguel Ojeda <ojeda@kernel.org> 8 * Date: 2006-10-12 9 */ 10 11 #ifndef _CFAG12864B_H_ 12 #define _CFAG12864B_H_ 13 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)) 22 23 /* 24 * The driver will blit this buffer to the LCD 25 * 26 * Its size is CFAG12864B_SIZE. 27 */ 28 extern unsigned char * cfag12864b_buffer; 29 30 /* 31 * Get the refresh rate of the LCD 32 * 33 * Returns the refresh rate (hertz). 34 */ 35 extern unsigned int cfag12864b_getrate(void); 36 37 /* 38 * Enable refreshing 39 * 40 * Returns 0 if successful (anyone was using it), 41 * or != 0 if failed (someone is using it). 42 */ 43 extern unsigned char cfag12864b_enable(void); 44 45 /* 46 * Disable refreshing 47 * 48 * You should call this only when you finish using the LCD. 49 */ 50 extern void cfag12864b_disable(void); 51 52 /* 53 * Is enabled refreshing? (is anyone using the module?) 54 * 55 * Returns 0 if refreshing is not enabled (anyone is using it), 56 * or != 0 if refreshing is enabled (someone is using it). 57 * 58 * Useful for buffer read-only modules. 59 */ 60 extern unsigned char cfag12864b_isenabled(void); 61 62 /* 63 * Is the module inited? 64 */ 65 extern unsigned char cfag12864b_isinited(void); 66 67 #endif /* _CFAG12864B_H_ */ 68 69