linux/drivers/auxdisplay/hd44780_common.h
Lars Poeschel 40c2b72e4b auxdisplay: Change gotoxy calling interface
Change the calling interface for gotoxy from supplying the x and y
coordinates in the charlcd struct to explicitly supplying x and y in
the function arguments. This is more intuitive and allows for moving
the cursor to positions independent from the position saved in the
charlcd struct.

Reviewed-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04 11:04:04 +01:00

34 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
#define DEFAULT_LCD_BWIDTH 40
#define DEFAULT_LCD_HWIDTH 64
struct hd44780_common {
int ifwidth; /* 4-bit or 8-bit (default) */
int bwidth; /* Default set by hd44780_alloc() */
int hwidth; /* Default set by hd44780_alloc() */
unsigned long hd44780_common_flags;
void (*write_data)(struct hd44780_common *hdc, int data);
void (*write_cmd)(struct hd44780_common *hdc, int cmd);
/* write_cmd_raw4 is for 4-bit connected displays only */
void (*write_cmd_raw4)(struct hd44780_common *hdc, int cmd);
void *hd44780;
};
int hd44780_common_print(struct charlcd *lcd, int c);
int hd44780_common_gotoxy(struct charlcd *lcd, unsigned int x, unsigned int y);
int hd44780_common_home(struct charlcd *lcd);
int hd44780_common_clear_display(struct charlcd *lcd);
int hd44780_common_init_display(struct charlcd *lcd);
int hd44780_common_shift_cursor(struct charlcd *lcd,
enum charlcd_shift_dir dir);
int hd44780_common_shift_display(struct charlcd *lcd,
enum charlcd_shift_dir dir);
int hd44780_common_display(struct charlcd *lcd, enum charlcd_onoff on);
int hd44780_common_cursor(struct charlcd *lcd, enum charlcd_onoff on);
int hd44780_common_blink(struct charlcd *lcd, enum charlcd_onoff on);
int hd44780_common_fontsize(struct charlcd *lcd, enum charlcd_fontsize size);
int hd44780_common_lines(struct charlcd *lcd, enum charlcd_lines lines);
int hd44780_common_redefine_char(struct charlcd *lcd, char *esc);
struct hd44780_common *hd44780_common_alloc(void);