1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Character LCD driver for Linux 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> 6*4882a593Smuzhiyun * Copyright (C) 2016-2017 Glider bvba 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef _CHARLCD_H 10*4882a593Smuzhiyun #define _CHARLCD_H 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun struct charlcd { 13*4882a593Smuzhiyun const struct charlcd_ops *ops; 14*4882a593Smuzhiyun const unsigned char *char_conv; /* Optional */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun int ifwidth; /* 4-bit or 8-bit (default) */ 17*4882a593Smuzhiyun int height; 18*4882a593Smuzhiyun int width; 19*4882a593Smuzhiyun int bwidth; /* Default set by charlcd_alloc() */ 20*4882a593Smuzhiyun int hwidth; /* Default set by charlcd_alloc() */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun void *drvdata; /* Set by charlcd_alloc() */ 23*4882a593Smuzhiyun }; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun struct charlcd_ops { 26*4882a593Smuzhiyun /* Required */ 27*4882a593Smuzhiyun void (*write_cmd)(struct charlcd *lcd, int cmd); 28*4882a593Smuzhiyun void (*write_data)(struct charlcd *lcd, int data); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* Optional */ 31*4882a593Smuzhiyun void (*write_cmd_raw4)(struct charlcd *lcd, int cmd); /* 4-bit only */ 32*4882a593Smuzhiyun void (*clear_fast)(struct charlcd *lcd); 33*4882a593Smuzhiyun void (*backlight)(struct charlcd *lcd, int on); 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct charlcd *charlcd_alloc(unsigned int drvdata_size); 37*4882a593Smuzhiyun void charlcd_free(struct charlcd *lcd); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun int charlcd_register(struct charlcd *lcd); 40*4882a593Smuzhiyun int charlcd_unregister(struct charlcd *lcd); 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun void charlcd_poke(struct charlcd *lcd); 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #endif /* CHARLCD_H */ 45