diff options
Diffstat (limited to 'drivers/auxdisplay')
| -rw-r--r-- | drivers/auxdisplay/charlcd.c | 60 | ||||
| -rw-r--r-- | drivers/auxdisplay/charlcd.h | 2 | ||||
| -rw-r--r-- | drivers/auxdisplay/hd44780.c | 2 | ||||
| -rw-r--r-- | drivers/auxdisplay/hd44780_common.c | 57 | ||||
| -rw-r--r-- | drivers/auxdisplay/hd44780_common.h | 1 | ||||
| -rw-r--r-- | drivers/auxdisplay/panel.c | 3 |
6 files changed, 70 insertions, 55 deletions
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c index 29737c3e18f6..dca1b138a239 100644 --- a/drivers/auxdisplay/charlcd.c +++ b/drivers/auxdisplay/charlcd.c @@ -25,8 +25,6 @@ /* Keep the backlight on this many seconds for each flash */ #define LCD_BL_TEMPO_PERIOD 4 -#define LCD_CMD_SET_CGRAM_ADDR 0x40 /* Set char generator RAM address */ - #define LCD_ESCAPE_LEN 24 /* Max chars for LCD escape command */ #define LCD_ESCAPE_CHAR 27 /* Use char 27 for escape command */ @@ -344,61 +342,13 @@ static inline int handle_lcd_special_code(struct charlcd *lcd) LCD_FLAG_C | LCD_FLAG_B; processed = 1; break; - case 'G': { - /* 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. - */ - - unsigned char cgbytes[8]; - unsigned char cgaddr; - int cgoffset; - int shift; - char value; - int addr; - - if (!strchr(esc, ';')) - break; - - esc++; - - cgaddr = *(esc++) - '0'; - if (cgaddr > 7) { + case 'G': + if (lcd->ops->redefine_char) + processed = lcd->ops->redefine_char(lcd, esc); + else processed = 1; - break; - } - - cgoffset = 0; - shift = 0; - value = 0; - while (*esc && cgoffset < 8) { - int half; - - shift ^= 4; - - half = hex_to_bin(*esc++); - if (half < 0) - continue; - - value |= half << shift; - if (shift == 0) { - cgbytes[cgoffset++] = value; - value = 0; - } - } - - hdc->write_cmd(hdc, LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8)); - for (addr = 0; addr < cgoffset; addr++) - hdc->write_data(hdc, cgbytes[addr]); - - /* ensures that we stop writing to CGRAM */ - lcd->ops->gotoxy(lcd); - processed = 1; break; - } + case 'x': /* gotoxy : LxXXX[yYYY]; */ case 'y': /* gotoxy : LyYYY[xXXX]; */ if (priv->esc_seq.buf[priv->esc_seq.len - 1] != ';') diff --git a/drivers/auxdisplay/charlcd.h b/drivers/auxdisplay/charlcd.h index 5a89bdeb659a..3339e8c2554e 100644 --- a/drivers/auxdisplay/charlcd.h +++ b/drivers/auxdisplay/charlcd.h @@ -75,6 +75,7 @@ struct charlcd { * @cursor: Turn cursor on or off. * @blink: Turn cursor blink on or off. * @lines: One or two lines. + * @redefine_char: Redefine the actual pixel matrix of character. */ struct charlcd_ops { void (*clear_fast)(struct charlcd *lcd); @@ -91,6 +92,7 @@ struct charlcd_ops { int (*blink)(struct charlcd *lcd, enum charlcd_onoff on); int (*fontsize)(struct charlcd *lcd, enum charlcd_fontsize size); int (*lines)(struct charlcd *lcd, enum charlcd_lines lines); + int (*redefine_char)(struct charlcd *lcd, char *esc); }; void charlcd_backlight(struct charlcd *lcd, enum charlcd_onoff on); diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c index 7b7b28d72198..2e5e7c993933 100644 --- a/drivers/auxdisplay/hd44780.c +++ b/drivers/auxdisplay/hd44780.c @@ -138,6 +138,7 @@ static const struct charlcd_ops hd44780_ops_gpio8 = { .blink = hd44780_common_blink, .fontsize = hd44780_common_fontsize, .lines = hd44780_common_lines, + .redefine_char = hd44780_common_redefine_char, }; /* Send a command to the LCD panel in 4 bit GPIO mode */ @@ -193,6 +194,7 @@ static const struct charlcd_ops hd44780_ops_gpio4 = { .blink = hd44780_common_blink, .fontsize = hd44780_common_fontsize, .lines = hd44780_common_lines, + .redefine_char = hd44780_common_redefine_char, }; static int hd44780_probe(struct platform_device *pdev) diff --git a/drivers/auxdisplay/hd44780_common.c b/drivers/auxdisplay/hd44780_common.c index 9d538fdcd260..c528fb8e8808 100644 --- a/drivers/auxdisplay/hd44780_common.c +++ b/drivers/auxdisplay/hd44780_common.c @@ -26,6 +26,8 @@ #define LCD_CMD_TWO_LINES 0x08 /* Set to two display lines */ #define LCD_CMD_FONT_5X10_DOTS 0x04 /* Set char font to 5x10 dots */ +#define LCD_CMD_SET_CGRAM_ADDR 0x40 /* Set char generator RAM address */ + #define LCD_CMD_SET_DDRAM_ADDR 0x80 /* Set display data RAM address */ /* sleeps that many milliseconds with a reschedule */ @@ -289,6 +291,61 @@ int hd44780_common_lines(struct charlcd *lcd, enum charlcd_lines lines) } EXPORT_SYMBOL_GPL(hd44780_common_lines); +int hd44780_common_redefine_char(struct charlcd *lcd, char *esc) +{ + /* 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. + */ + + struct hd44780_common *hdc = lcd->drvdata; + unsigned char cgbytes[8]; + unsigned char cgaddr; + int cgoffset; + int shift; + char value; + int addr; + + if (!strchr(esc, ';')) + return 0; + + esc++; + + cgaddr = *(esc++) - '0'; + if (cgaddr > 7) + return 1; + + cgoffset = 0; + shift = 0; + value = 0; + while (*esc && cgoffset < 8) { + int half; + + shift ^= 4; + half = hex_to_bin(*esc++); + if (half < 0) + continue; + + value |= half << shift; + if (shift == 0) { + cgbytes[cgoffset++] = value; + value = 0; + } + } + + hdc->write_cmd(hdc, LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8)); + for (addr = 0; addr < cgoffset; addr++) + hdc->write_data(hdc, cgbytes[addr]); + + /* ensures that we stop writing to CGRAM */ + lcd->ops->gotoxy(lcd); + return 1; +} +EXPORT_SYMBOL_GPL(hd44780_common_redefine_char); + struct hd44780_common *hd44780_common_alloc(void) { struct hd44780_common *hd; diff --git a/drivers/auxdisplay/hd44780_common.h b/drivers/auxdisplay/hd44780_common.h index e5a69fdc3b61..bc817d1610d4 100644 --- a/drivers/auxdisplay/hd44780_common.h +++ b/drivers/auxdisplay/hd44780_common.h @@ -29,4 +29,5 @@ 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); diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c index 3d33d7cc979c..b0d2ae5b9be8 100644 --- a/drivers/auxdisplay/panel.c +++ b/drivers/auxdisplay/panel.c @@ -886,6 +886,7 @@ static const struct charlcd_ops charlcd_serial_ops = { .blink = hd44780_common_blink, .fontsize = hd44780_common_fontsize, .lines = hd44780_common_lines, + .redefine_char = hd44780_common_redefine_char, }; static const struct charlcd_ops charlcd_parallel_ops = { @@ -902,6 +903,7 @@ static const struct charlcd_ops charlcd_parallel_ops = { .blink = hd44780_common_blink, .fontsize = hd44780_common_fontsize, .lines = hd44780_common_lines, + .redefine_char = hd44780_common_redefine_char, }; static const struct charlcd_ops charlcd_tilcd_ops = { @@ -918,6 +920,7 @@ static const struct charlcd_ops charlcd_tilcd_ops = { .blink = hd44780_common_blink, .fontsize = hd44780_common_fontsize, .lines = hd44780_common_lines, + .redefine_char = hd44780_common_redefine_char, }; /* initialize the LCD driver */ |