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-rw-r--r--drivers/auxdisplay/charlcd.c40
-rw-r--r--drivers/auxdisplay/charlcd.h6
-rw-r--r--drivers/auxdisplay/hd44780.c24
-rw-r--r--drivers/auxdisplay/hd44780_common.c2
-rw-r--r--drivers/auxdisplay/hd44780_common.h5
-rw-r--r--drivers/auxdisplay/panel.c45
6 files changed, 67 insertions, 55 deletions
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c
index 8aaee0fea9ab..02392336d7d3 100644
--- a/drivers/auxdisplay/charlcd.c
+++ b/drivers/auxdisplay/charlcd.c
@@ -21,9 +21,7 @@
#include <generated/utsrelease.h>
#include "charlcd.h"
-
-#define DEFAULT_LCD_BWIDTH 40
-#define DEFAULT_LCD_HWIDTH 64
+#include "hd44780_common.h"
/* Keep the backlight on this many seconds for each flash */
#define LCD_BL_TEMPO_PERIOD 4
@@ -151,18 +149,19 @@ EXPORT_SYMBOL_GPL(charlcd_poke);
static void charlcd_gotoxy(struct charlcd *lcd)
{
struct charlcd_priv *priv = charlcd_to_priv(lcd);
+ struct hd44780_common *hdc = lcd->drvdata;
unsigned int addr;
/*
* we force the cursor to stay at the end of the
* line if it wants to go farther
*/
- addr = priv->addr.x < lcd->bwidth ? priv->addr.x & (lcd->hwidth - 1)
- : lcd->bwidth - 1;
+ addr = priv->addr.x < hdc->bwidth ? priv->addr.x & (hdc->hwidth - 1)
+ : hdc->bwidth - 1;
if (priv->addr.y & 1)
- addr += lcd->hwidth;
+ addr += hdc->hwidth;
if (priv->addr.y & 2)
- addr += lcd->bwidth;
+ addr += hdc->bwidth;
lcd->ops->write_cmd(lcd, LCD_CMD_SET_DDRAM_ADDR | addr);
}
@@ -178,21 +177,23 @@ static void charlcd_home(struct charlcd *lcd)
static void charlcd_print(struct charlcd *lcd, char c)
{
struct charlcd_priv *priv = charlcd_to_priv(lcd);
+ struct hd44780_common *hdc = lcd->drvdata;
- if (priv->addr.x < lcd->bwidth) {
+ if (priv->addr.x < hdc->bwidth) {
if (lcd->char_conv)
c = lcd->char_conv[(unsigned char)c];
lcd->ops->write_data(lcd, c);
priv->addr.x++;
/* prevents the cursor from wrapping onto the next line */
- if (priv->addr.x == lcd->bwidth)
+ if (priv->addr.x == hdc->bwidth)
charlcd_gotoxy(lcd);
}
}
static void charlcd_clear_fast(struct charlcd *lcd)
{
+ struct hd44780_common *hdc = lcd->drvdata;
int pos;
charlcd_home(lcd);
@@ -200,7 +201,7 @@ static void charlcd_clear_fast(struct charlcd *lcd)
if (lcd->ops->clear_fast)
lcd->ops->clear_fast(lcd);
else
- for (pos = 0; pos < min(2, lcd->height) * lcd->hwidth; pos++)
+ for (pos = 0; pos < min(2, lcd->height) * hdc->hwidth; pos++)
lcd->ops->write_data(lcd, ' ');
charlcd_home(lcd);
@@ -348,6 +349,7 @@ static bool parse_xy(const char *s, unsigned long *x, unsigned long *y)
static inline int handle_lcd_special_code(struct charlcd *lcd)
{
struct charlcd_priv *priv = charlcd_to_priv(lcd);
+ struct hd44780_common *hdc = lcd->drvdata;
/* LCD special codes */
@@ -413,7 +415,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
case 'l': /* Shift Cursor Left */
if (priv->addr.x > 0) {
/* back one char if not at end of line */
- if (priv->addr.x < lcd->bwidth)
+ if (priv->addr.x < hdc->bwidth)
lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
priv->addr.x--;
}
@@ -422,7 +424,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
case 'r': /* shift cursor right */
if (priv->addr.x < lcd->width) {
/* allow the cursor to pass the end of the line */
- if (priv->addr.x < (lcd->bwidth - 1))
+ if (priv->addr.x < (hdc->bwidth - 1))
lcd->ops->write_cmd(lcd,
LCD_CMD_SHIFT | LCD_CMD_SHIFT_RIGHT);
priv->addr.x++;
@@ -442,7 +444,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
case 'k': { /* kill end of line */
int x;
- for (x = priv->addr.x; x < lcd->bwidth; x++)
+ for (x = priv->addr.x; x < hdc->bwidth; x++)
lcd->ops->write_data(lcd, ' ');
/* restore cursor position */
@@ -554,6 +556,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
static void charlcd_write_char(struct charlcd *lcd, char c)
{
struct charlcd_priv *priv = charlcd_to_priv(lcd);
+ struct hd44780_common *hdc = lcd->drvdata;
/* first, we'll test if we're in escape mode */
if ((c != '\n') && priv->esc_seq.len >= 0) {
@@ -577,7 +580,7 @@ static void charlcd_write_char(struct charlcd *lcd, char c)
* check if we're not at the
* end of the line
*/
- if (priv->addr.x < lcd->bwidth)
+ if (priv->addr.x < hdc->bwidth)
/* back one char */
lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
priv->addr.x--;
@@ -596,7 +599,7 @@ static void charlcd_write_char(struct charlcd *lcd, char c)
* flush the remainder of the current line and
* go to the beginning of the next line
*/
- for (; priv->addr.x < lcd->bwidth; priv->addr.x++)
+ for (; priv->addr.x < hdc->bwidth; priv->addr.x++)
lcd->ops->write_data(lcd, ' ');
priv->addr.x = 0;
priv->addr.y = (priv->addr.y + 1) % lcd->height;
@@ -779,12 +782,12 @@ static int charlcd_init(struct charlcd *lcd)
return 0;
}
-struct charlcd *charlcd_alloc(unsigned int drvdata_size)
+struct charlcd *charlcd_alloc(void)
{
struct charlcd_priv *priv;
struct charlcd *lcd;
- priv = kzalloc(sizeof(*priv) + drvdata_size, GFP_KERNEL);
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return NULL;
@@ -792,9 +795,6 @@ struct charlcd *charlcd_alloc(unsigned int drvdata_size)
lcd = &priv->lcd;
lcd->ifwidth = 8;
- lcd->bwidth = DEFAULT_LCD_BWIDTH;
- lcd->hwidth = DEFAULT_LCD_HWIDTH;
- lcd->drvdata = priv->drvdata;
return lcd;
}
diff --git a/drivers/auxdisplay/charlcd.h b/drivers/auxdisplay/charlcd.h
index c66f038e5d2b..2a12d07705a3 100644
--- a/drivers/auxdisplay/charlcd.h
+++ b/drivers/auxdisplay/charlcd.h
@@ -21,10 +21,8 @@ struct charlcd {
int ifwidth; /* 4-bit or 8-bit (default) */
int height;
int width;
- int bwidth; /* Default set by charlcd_alloc() */
- int hwidth; /* Default set by charlcd_alloc() */
- void *drvdata; /* Set by charlcd_alloc() */
+ void *drvdata;
};
struct charlcd_ops {
@@ -38,7 +36,7 @@ struct charlcd_ops {
void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on);
};
-struct charlcd *charlcd_alloc(unsigned int drvdata_size);
+struct charlcd *charlcd_alloc(void);
void charlcd_free(struct charlcd *lcd);
int charlcd_register(struct charlcd *lcd);
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c
index 271dba9cd108..0603af8f2336 100644
--- a/drivers/auxdisplay/hd44780.c
+++ b/drivers/auxdisplay/hd44780.c
@@ -40,7 +40,8 @@ struct hd44780 {
static void hd44780_backlight(struct charlcd *lcd, enum charlcd_onoff on)
{
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
if (hd->pins[PIN_CTRL_BL])
gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);
@@ -104,7 +105,8 @@ static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)
/* Send a command to the LCD panel in 8 bit GPIO mode */
static void hd44780_write_cmd_gpio8(struct charlcd *lcd, int cmd)
{
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
hd44780_write_gpio8(hd, cmd, 0);
@@ -115,7 +117,8 @@ static void hd44780_write_cmd_gpio8(struct charlcd *lcd, int cmd)
/* Send data to the LCD panel in 8 bit GPIO mode */
static void hd44780_write_data_gpio8(struct charlcd *lcd, int data)
{
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
hd44780_write_gpio8(hd, data, 1);
@@ -132,7 +135,8 @@ static const struct charlcd_ops hd44780_ops_gpio8 = {
/* Send a command to the LCD panel in 4 bit GPIO mode */
static void hd44780_write_cmd_gpio4(struct charlcd *lcd, int cmd)
{
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
hd44780_write_gpio4(hd, cmd, 0);
@@ -144,7 +148,8 @@ static void hd44780_write_cmd_gpio4(struct charlcd *lcd, int cmd)
static void hd44780_write_cmd_raw_gpio4(struct charlcd *lcd, int cmd)
{
DECLARE_BITMAP(values, 6); /* for DATA[4-7], RS, RW */
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
unsigned int n;
/* Command nibble + RS, RW */
@@ -160,7 +165,8 @@ static void hd44780_write_cmd_raw_gpio4(struct charlcd *lcd, int cmd)
/* Send data to the LCD panel in 4 bit GPIO mode */
static void hd44780_write_data_gpio4(struct charlcd *lcd, int data)
{
- struct hd44780 *hd = lcd->drvdata;
+ struct hd44780_common *hdc = lcd->drvdata;
+ struct hd44780 *hd = hdc->hd44780;
hd44780_write_gpio4(hd, data, 1);
@@ -204,7 +210,7 @@ static int hd44780_probe(struct platform_device *pdev)
if (!hdc)
return -ENOMEM;
- lcd = charlcd_alloc(sizeof(struct hd44780));
+ lcd = charlcd_alloc();
if (!lcd)
goto fail1;
@@ -264,10 +270,10 @@ static int hd44780_probe(struct platform_device *pdev)
* usually equal to the display width
*/
if (lcd->height > 2)
- lcd->bwidth = lcd->width;
+ hdc->bwidth = lcd->width;
/* Optional properties */
- device_property_read_u32(dev, "internal-buffer-width", &lcd->bwidth);
+ device_property_read_u32(dev, "internal-buffer-width", &hdc->bwidth);
lcd->ifwidth = ifwidth;
lcd->ops = ifwidth == 8 ? &hd44780_ops_gpio8 : &hd44780_ops_gpio4;
diff --git a/drivers/auxdisplay/hd44780_common.c b/drivers/auxdisplay/hd44780_common.c
index 2fdea29d6a8f..3a05fd30cae0 100644
--- a/drivers/auxdisplay/hd44780_common.c
+++ b/drivers/auxdisplay/hd44780_common.c
@@ -12,6 +12,8 @@ struct hd44780_common *hd44780_common_alloc(void)
if (!hd)
return NULL;
+ hd->bwidth = DEFAULT_LCD_BWIDTH;
+ hd->hwidth = DEFAULT_LCD_HWIDTH;
return hd;
}
EXPORT_SYMBOL_GPL(hd44780_common_alloc);
diff --git a/drivers/auxdisplay/hd44780_common.h b/drivers/auxdisplay/hd44780_common.h
index 974868f7529c..9647d24c4490 100644
--- a/drivers/auxdisplay/hd44780_common.h
+++ b/drivers/auxdisplay/hd44780_common.h
@@ -1,6 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
+#define DEFAULT_LCD_BWIDTH 40
+#define DEFAULT_LCD_HWIDTH 64
+
struct hd44780_common {
+ int bwidth; /* Default set by hd44780_alloc() */
+ int hwidth; /* Default set by hd44780_alloc() */
void *hd44780;
};
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index c3a60e190a7a..cec6b729d668 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -299,8 +299,6 @@ static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
#define DEFAULT_LCD_TYPE LCD_TYPE_OLD
#define DEFAULT_LCD_HEIGHT 2
#define DEFAULT_LCD_WIDTH 40
-#define DEFAULT_LCD_BWIDTH 40
-#define DEFAULT_LCD_HWIDTH 64
#define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL
#define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL
@@ -813,10 +811,11 @@ static void lcd_write_data_tilcd(struct charlcd *charlcd, int data)
/* fills the display with spaces and resets X/Y */
static void lcd_clear_fast_s(struct charlcd *charlcd)
{
+ struct hd44780_common *hdc = charlcd->drvdata;
int pos;
spin_lock_irq(&pprt_lock);
- for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ for (pos = 0; pos < charlcd->height * hdc->hwidth; pos++) {
lcd_send_serial(0x5F); /* R/W=W, RS=1 */
lcd_send_serial(' ' & 0x0F);
lcd_send_serial((' ' >> 4) & 0x0F);
@@ -829,10 +828,11 @@ static void lcd_clear_fast_s(struct charlcd *charlcd)
/* fills the display with spaces and resets X/Y */
static void lcd_clear_fast_p8(struct charlcd *charlcd)
{
+ struct hd44780_common *hdc = charlcd->drvdata;
int pos;
spin_lock_irq(&pprt_lock);
- for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ for (pos = 0; pos < charlcd->height * hdc->hwidth; pos++) {
/* present the data to the data port */
w_dtr(pprt, ' ');
@@ -859,10 +859,11 @@ static void lcd_clear_fast_p8(struct charlcd *charlcd)
/* fills the display with spaces and resets X/Y */
static void lcd_clear_fast_tilcd(struct charlcd *charlcd)
{
+ struct hd44780_common *hdc = charlcd->drvdata;
int pos;
spin_lock_irq(&pprt_lock);
- for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ for (pos = 0; pos < charlcd->height * hdc->hwidth; pos++) {
/* present the data to the data port */
w_dtr(pprt, ' ');
udelay(60);
@@ -902,7 +903,7 @@ static void lcd_init(void)
if (!hdc)
return;
- charlcd = charlcd_alloc(0);
+ charlcd = charlcd_alloc();
if (!charlcd) {
kfree(hdc);
return;
@@ -917,8 +918,8 @@ static void lcd_init(void)
*/
charlcd->height = lcd_height;
charlcd->width = lcd_width;
- charlcd->bwidth = lcd_bwidth;
- charlcd->hwidth = lcd_hwidth;
+ hdc->bwidth = lcd_bwidth;
+ hdc->hwidth = lcd_hwidth;
switch (selected_lcd_type) {
case LCD_TYPE_OLD:
@@ -929,8 +930,8 @@ static void lcd_init(void)
lcd.pins.rs = PIN_AUTOLF;
charlcd->width = 40;
- charlcd->bwidth = 40;
- charlcd->hwidth = 64;
+ hdc->bwidth = 40;
+ hdc->hwidth = 64;
charlcd->height = 2;
break;
case LCD_TYPE_KS0074:
@@ -942,8 +943,8 @@ static void lcd_init(void)
lcd.pins.da = PIN_D0;
charlcd->width = 16;
- charlcd->bwidth = 40;
- charlcd->hwidth = 16;
+ hdc->bwidth = 40;
+ hdc->hwidth = 16;
charlcd->height = 2;
break;
case LCD_TYPE_NEXCOM:
@@ -955,8 +956,8 @@ static void lcd_init(void)
lcd.pins.rw = PIN_INITP;
charlcd->width = 16;
- charlcd->bwidth = 40;
- charlcd->hwidth = 64;
+ hdc->bwidth = 40;
+ hdc->hwidth = 64;
charlcd->height = 2;
break;
case LCD_TYPE_CUSTOM:
@@ -974,8 +975,8 @@ static void lcd_init(void)
lcd.pins.rs = PIN_SELECP;
charlcd->width = 16;
- charlcd->bwidth = 40;
- charlcd->hwidth = 64;
+ hdc->bwidth = 40;
+ hdc->hwidth = 64;
charlcd->height = 2;
break;
}
@@ -986,9 +987,9 @@ static void lcd_init(void)
if (lcd_width != NOT_SET)
charlcd->width = lcd_width;
if (lcd_bwidth != NOT_SET)
- charlcd->bwidth = lcd_bwidth;
+ hdc->bwidth = lcd_bwidth;
if (lcd_hwidth != NOT_SET)
- charlcd->hwidth = lcd_hwidth;
+ hdc->hwidth = lcd_hwidth;
if (lcd_charset != NOT_SET)
lcd.charset = lcd_charset;
if (lcd_proto != NOT_SET)
@@ -1009,10 +1010,10 @@ static void lcd_init(void)
/* this is used to catch wrong and default values */
if (charlcd->width <= 0)
charlcd->width = DEFAULT_LCD_WIDTH;
- if (charlcd->bwidth <= 0)
- charlcd->bwidth = DEFAULT_LCD_BWIDTH;
- if (charlcd->hwidth <= 0)
- charlcd->hwidth = DEFAULT_LCD_HWIDTH;
+ if (hdc->bwidth <= 0)
+ hdc->bwidth = DEFAULT_LCD_BWIDTH;
+ if (hdc->hwidth <= 0)
+ hdc->hwidth = DEFAULT_LCD_HWIDTH;
if (charlcd->height <= 0)
charlcd->height = DEFAULT_LCD_HEIGHT;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.