include/linux/cfag12864b.h

   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 Sandonis
   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