// SPDX-License-Identifier: GPL-2.0 /* * Console driver for LCD2S 4x20 character displays connected through i2c. * The display also has a SPI interface, but the driver does not support * this yet. * * This is a driver allowing you to use a LCD2S 4x20 from Modtronix * engineering as auxdisplay character device. * * (C) 2019 by Lemonage Software GmbH * Author: Lars Pöschel <[email protected]> * All rights reserved. */ #include <linux/kernel.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/property.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/delay.h> #include "charlcd.h" #define LCD2S_CMD_CUR_MOVES_FWD … #define LCD2S_CMD_CUR_BLINK_OFF … #define LCD2S_CMD_CUR_UL_OFF … #define LCD2S_CMD_DISPLAY_OFF … #define LCD2S_CMD_CUR_BLINK_ON … #define LCD2S_CMD_CUR_UL_ON … #define LCD2S_CMD_DISPLAY_ON … #define LCD2S_CMD_BACKLIGHT_OFF … #define LCD2S_CMD_BACKLIGHT_ON … #define LCD2S_CMD_WRITE … #define LCD2S_CMD_MOV_CUR_RIGHT … #define LCD2S_CMD_MOV_CUR_LEFT … #define LCD2S_CMD_SHIFT_RIGHT … #define LCD2S_CMD_SHIFT_LEFT … #define LCD2S_CMD_SHIFT_UP … #define LCD2S_CMD_SHIFT_DOWN … #define LCD2S_CMD_CUR_ADDR … #define LCD2S_CMD_CUR_POS … #define LCD2S_CMD_CUR_RESET … #define LCD2S_CMD_CLEAR … #define LCD2S_CMD_DEF_CUSTOM_CHAR … #define LCD2S_CMD_READ_STATUS … #define LCD2S_CHARACTER_SIZE … #define LCD2S_STATUS_BUF_MASK … struct lcd2s_data { … }; static s32 lcd2s_wait_buf_free(const struct i2c_client *client, int count) { … } static int lcd2s_i2c_master_send(const struct i2c_client *client, const char *buf, int count) { … } static int lcd2s_i2c_smbus_write_byte(const struct i2c_client *client, u8 value) { … } static int lcd2s_print(struct charlcd *lcd, int c) { … } static int lcd2s_gotoxy(struct charlcd *lcd, unsigned int x, unsigned int y) { … } static int lcd2s_home(struct charlcd *lcd) { … } static int lcd2s_init_display(struct charlcd *lcd) { … } static int lcd2s_shift_cursor(struct charlcd *lcd, enum charlcd_shift_dir dir) { … } static int lcd2s_shift_display(struct charlcd *lcd, enum charlcd_shift_dir dir) { … } static void lcd2s_backlight(struct charlcd *lcd, enum charlcd_onoff on) { … } static int lcd2s_display(struct charlcd *lcd, enum charlcd_onoff on) { … } static int lcd2s_cursor(struct charlcd *lcd, enum charlcd_onoff on) { … } static int lcd2s_blink(struct charlcd *lcd, enum charlcd_onoff on) { … } static int lcd2s_fontsize(struct charlcd *lcd, enum charlcd_fontsize size) { … } static int lcd2s_lines(struct charlcd *lcd, enum charlcd_lines lines) { … } /* * Generator: LGcxxxxx...xx; must have <c> between '0' and '7', * representing the numerical ASCII code of the redefined character, * and <xx...xx> a sequence of 16 hex digits representing 8 bytes * for each character. Most LCDs will only use 5 lower bits of * the 7 first bytes. */ static int lcd2s_redefine_char(struct charlcd *lcd, char *esc) { … } static int lcd2s_clear_display(struct charlcd *lcd) { … } static const struct charlcd_ops lcd2s_ops = …; static int lcd2s_i2c_probe(struct i2c_client *i2c) { … } static void lcd2s_i2c_remove(struct i2c_client *i2c) { … } static const struct i2c_device_id lcd2s_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, lcd2s_i2c_id); static const struct of_device_id lcd2s_of_table[] = …; MODULE_DEVICE_TABLE(of, lcd2s_of_table); static struct i2c_driver lcd2s_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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