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-rw-r--r--Documentation/auxdisplay/lcd-panel-cgram.txt (renamed from Documentation/misc-devices/lcd-panel-cgram.txt)0
-rw-r--r--MAINTAINERS8
-rw-r--r--drivers/auxdisplay/Kconfig16
-rw-r--r--drivers/auxdisplay/arm-charlcd.c4
-rw-r--r--drivers/auxdisplay/cfag12864b.c16
-rw-r--r--drivers/auxdisplay/cfag12864bfb.c20
-rw-r--r--drivers/auxdisplay/charlcd.c119
-rw-r--r--drivers/auxdisplay/hd44780.c6
-rw-r--r--drivers/auxdisplay/ht16k33.c10
-rw-r--r--drivers/auxdisplay/ks0108.c16
-rw-r--r--drivers/auxdisplay/panel.c6
-rw-r--r--include/linux/cfag12864b.h16
-rw-r--r--include/linux/ks0108.h16
-rw-r--r--samples/auxdisplay/cfag12864b-example.c16
14 files changed, 111 insertions, 158 deletions
diff --git a/Documentation/misc-devices/lcd-panel-cgram.txt b/Documentation/auxdisplay/lcd-panel-cgram.txt
index 7f82c905763d..7f82c905763d 100644
--- a/Documentation/misc-devices/lcd-panel-cgram.txt
+++ b/Documentation/auxdisplay/lcd-panel-cgram.txt
diff --git a/MAINTAINERS b/MAINTAINERS
index d96c613d777d..5c29a7dee379 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2533,8 +2533,6 @@ F: kernel/audit*
AUXILIARY DISPLAY DRIVERS
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
-W: http://miguelojeda.es/auxdisplay.htm
-W: http://jair.lab.fi.uva.es/~migojed/auxdisplay.htm
S: Maintained
F: drivers/auxdisplay/
F: include/linux/cfag12864b.h
@@ -3384,16 +3382,12 @@ F: include/linux/usb/wusb*
CFAG12864B LCD DRIVER
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
-W: http://miguelojeda.es/auxdisplay.htm
-W: http://jair.lab.fi.uva.es/~migojed/auxdisplay.htm
S: Maintained
F: drivers/auxdisplay/cfag12864b.c
F: include/linux/cfag12864b.h
CFAG12864BFB LCD FRAMEBUFFER DRIVER
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
-W: http://miguelojeda.es/auxdisplay.htm
-W: http://jair.lab.fi.uva.es/~migojed/auxdisplay.htm
S: Maintained
F: drivers/auxdisplay/cfag12864bfb.c
F: include/linux/cfag12864b.h
@@ -7977,8 +7971,6 @@ F: kernel/kprobes.c
KS0108 LCD CONTROLLER DRIVER
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
-W: http://miguelojeda.es/auxdisplay.htm
-W: http://jair.lab.fi.uva.es/~migojed/auxdisplay.htm
S: Maintained
F: Documentation/auxdisplay/ks0108
F: drivers/auxdisplay/ks0108.c
diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig
index 2c2ed9cf8796..57410f9c5d44 100644
--- a/drivers/auxdisplay/Kconfig
+++ b/drivers/auxdisplay/Kconfig
@@ -14,9 +14,6 @@ menuconfig AUXDISPLAY
If you say N, all options in this submenu will be skipped and disabled.
-config CHARLCD
- tristate "Character LCD core support" if COMPILE_TEST
-
if AUXDISPLAY
config HD44780
@@ -137,8 +134,8 @@ config CFAG12864B_RATE
config IMG_ASCII_LCD
tristate "Imagination Technologies ASCII LCD Display"
depends on HAS_IOMEM
- default y if MIPS_MALTA || MIPS_SEAD3
- select SYSCON
+ default y if MIPS_MALTA
+ select MFD_SYSCON
help
Enable this to support the simple ASCII LCD displays found on
development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3
@@ -157,8 +154,6 @@ config HT16K33
Say yes here to add support for Holtek HT16K33, RAM mapping 16*8
LED controller driver with keyscan.
-endif # AUXDISPLAY
-
config ARM_CHARLCD
bool "ARM Ltd. Character LCD Driver"
depends on PLAT_VERSATILE
@@ -169,7 +164,9 @@ config ARM_CHARLCD
line and the Linux version on the second line, but that's
still useful.
-config PANEL
+endif # AUXDISPLAY
+
+menuconfig PANEL
tristate "Parallel port LCD/Keypad Panel support"
depends on PARPORT
select CHARLCD
@@ -448,3 +445,6 @@ config PANEL_BOOT_MESSAGE
printf()-formatted message is valid with newline and escape codes.
endif # PANEL
+
+config CHARLCD
+ tristate "Character LCD core support" if COMPILE_TEST
diff --git a/drivers/auxdisplay/arm-charlcd.c b/drivers/auxdisplay/arm-charlcd.c
index b3176ee92b90..296fb30dfa00 100644
--- a/drivers/auxdisplay/arm-charlcd.c
+++ b/drivers/auxdisplay/arm-charlcd.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the on-board character LCD found on some ARM reference boards
* This is basically an Hitachi HD44780 LCD with a custom IP block to drive it
* http://en.wikipedia.org/wiki/HD44780_Character_LCD
* Currently it will just display the text "ARM Linux" and the linux version
*
- * License terms: GNU General Public License (GPL) version 2
* Author: Linus Walleij <triad@df.lth.se>
*/
#include <linux/init.h>
@@ -54,12 +54,14 @@
#define HD_BUSY_FLAG 0x80U
/**
+ * struct charlcd - Private data structure
* @dev: a pointer back to containing device
* @phybase: the offset to the controller in physical memory
* @physize: the size of the physical page
* @virtbase: the offset to the controller in virtual memory
* @irq: reserved interrupt number
* @complete: completion structure for the last LCD command
+ * @init_work: delayed work structure to initialize the display on boot
*/
struct charlcd {
struct device *dev;
diff --git a/drivers/auxdisplay/cfag12864b.c b/drivers/auxdisplay/cfag12864b.c
index 41ce4bd96813..6bd2f65e116a 100644
--- a/drivers/auxdisplay/cfag12864b.c
+++ b/drivers/auxdisplay/cfag12864b.c
@@ -1,26 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Filename: cfag12864b.c
* Version: 0.1.0
* Description: cfag12864b LCD driver
- * License: GPLv2
* Depends: ks0108
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <linux/init.h>
diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
index a3874034e2ce..40c8a552a478 100644
--- a/drivers/auxdisplay/cfag12864bfb.c
+++ b/drivers/auxdisplay/cfag12864bfb.c
@@ -1,26 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Filename: cfag12864bfb.c
* Version: 0.1.0
* Description: cfag12864b LCD framebuffer driver
- * License: GPLv2
* Depends: cfag12864b
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <linux/init.h>
@@ -37,7 +23,7 @@
#define CFAG12864BFB_NAME "cfag12864bfb"
-static struct fb_fix_screeninfo cfag12864bfb_fix = {
+static const struct fb_fix_screeninfo cfag12864bfb_fix = {
.id = "cfag12864b",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_MONO10,
@@ -48,7 +34,7 @@ static struct fb_fix_screeninfo cfag12864bfb_fix = {
.accel = FB_ACCEL_NONE,
};
-static struct fb_var_screeninfo cfag12864bfb_var = {
+static const struct fb_var_screeninfo cfag12864bfb_var = {
.xres = CFAG12864B_WIDTH,
.yres = CFAG12864B_HEIGHT,
.xres_virtual = CFAG12864B_WIDTH,
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c
index 642afd88870b..8673fc2b9eb8 100644
--- a/drivers/auxdisplay/charlcd.c
+++ b/drivers/auxdisplay/charlcd.c
@@ -1,16 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Character LCD driver for Linux
*
* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
* Copyright (C) 2016-2017 Glider bvba
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/atomic.h>
+#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
@@ -192,10 +189,11 @@ static void charlcd_print(struct charlcd *lcd, char c)
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)
+ charlcd_gotoxy(lcd);
}
- /* prevents the cursor from wrapping onto the next line */
- if (priv->addr.x == lcd->bwidth)
- charlcd_gotoxy(lcd);
}
static void charlcd_clear_fast(struct charlcd *lcd)
@@ -293,6 +291,79 @@ static int charlcd_init_display(struct charlcd *lcd)
}
/*
+ * Parses an unsigned integer from a string, until a non-digit character
+ * is found. The empty string is not accepted. No overflow checks are done.
+ *
+ * Returns whether the parsing was successful. Only in that case
+ * the output parameters are written to.
+ *
+ * TODO: If the kernel adds an inplace version of kstrtoul(), this function
+ * could be easily replaced by that.
+ */
+static bool parse_n(const char *s, unsigned long *res, const char **next_s)
+{
+ if (!isdigit(*s))
+ return false;
+
+ *res = 0;
+ while (isdigit(*s)) {
+ *res = *res * 10 + (*s - '0');
+ ++s;
+ }
+
+ *next_s = s;
+ return true;
+}
+
+/*
+ * Parses a movement command of the form "(.*);", where the group can be
+ * any number of subcommands of the form "(x|y)[0-9]+".
+ *
+ * Returns whether the command is valid. The position arguments are
+ * only written if the parsing was successful.
+ *
+ * For instance:
+ * - ";" returns (<original x>, <original y>).
+ * - "x1;" returns (1, <original y>).
+ * - "y2x1;" returns (1, 2).
+ * - "x12y34x56;" returns (56, 34).
+ * - "" fails.
+ * - "x" fails.
+ * - "x;" fails.
+ * - "x1" fails.
+ * - "xy12;" fails.
+ * - "x12yy12;" fails.
+ * - "xx" fails.
+ */
+static bool parse_xy(const char *s, unsigned long *x, unsigned long *y)
+{
+ unsigned long new_x = *x;
+ unsigned long new_y = *y;
+
+ for (;;) {
+ if (!*s)
+ return false;
+
+ if (*s == ';')
+ break;
+
+ if (*s == 'x') {
+ if (!parse_n(s + 1, &new_x, &s))
+ return false;
+ } else if (*s == 'y') {
+ if (!parse_n(s + 1, &new_y, &s))
+ return false;
+ } else {
+ return false;
+ }
+ }
+
+ *x = new_x;
+ *y = new_y;
+ return true;
+}
+
+/*
* These are the file operation function for user access to /dev/lcd
* This function can also be called from inside the kernel, by
* setting file and ppos to NULL.
@@ -362,6 +433,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
break;
case 'N': /* Two Lines */
priv->flags |= LCD_FLAG_N;
+ processed = 1;
break;
case 'l': /* Shift Cursor Left */
if (priv->addr.x > 0) {
@@ -441,9 +513,9 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
shift ^= 4;
if (*esc >= '0' && *esc <= '9') {
value |= (*esc - '0') << shift;
- } else if (*esc >= 'A' && *esc <= 'Z') {
+ } else if (*esc >= 'A' && *esc <= 'F') {
value |= (*esc - 'A' + 10) << shift;
- } else if (*esc >= 'a' && *esc <= 'z') {
+ } else if (*esc >= 'a' && *esc <= 'f') {
value |= (*esc - 'a' + 10) << shift;
} else {
esc++;
@@ -469,24 +541,11 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
}
case 'x': /* gotoxy : LxXXX[yYYY]; */
case 'y': /* gotoxy : LyYYY[xXXX]; */
- if (!strchr(esc, ';'))
- break;
-
- while (*esc) {
- if (*esc == 'x') {
- esc++;
- if (kstrtoul(esc, 10, &priv->addr.x) < 0)
- break;
- } else if (*esc == 'y') {
- esc++;
- if (kstrtoul(esc, 10, &priv->addr.y) < 0)
- break;
- } else {
- break;
- }
- }
+ /* If the command is valid, move to the new address */
+ if (parse_xy(esc, &priv->addr.x, &priv->addr.y))
+ charlcd_gotoxy(lcd);
- charlcd_gotoxy(lcd);
+ /* Regardless of its validity, mark as processed */
processed = 1;
break;
}
@@ -527,7 +586,7 @@ static void charlcd_write_char(struct charlcd *lcd, char c)
if ((c != '\n') && priv->esc_seq.len >= 0) {
/* yes, let's add this char to the buffer */
priv->esc_seq.buf[priv->esc_seq.len++] = c;
- priv->esc_seq.buf[priv->esc_seq.len] = 0;
+ priv->esc_seq.buf[priv->esc_seq.len] = '\0';
} else {
/* aborts any previous escape sequence */
priv->esc_seq.len = -1;
@@ -536,7 +595,7 @@ static void charlcd_write_char(struct charlcd *lcd, char c)
case LCD_ESCAPE_CHAR:
/* start of an escape sequence */
priv->esc_seq.len = 0;
- priv->esc_seq.buf[priv->esc_seq.len] = 0;
+ priv->esc_seq.buf[priv->esc_seq.len] = '\0';
break;
case '\b':
/* go back one char and clear it */
@@ -555,7 +614,7 @@ static void charlcd_write_char(struct charlcd *lcd, char c)
/* back one char again */
lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
break;
- case '\014':
+ case '\f':
/* quickly clear the display */
charlcd_clear_fast(lcd);
break;
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c
index 036eec404289..78d8f1986fec 100644
--- a/drivers/auxdisplay/hd44780.c
+++ b/drivers/auxdisplay/hd44780.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* HD44780 Character LCD driver for Linux
*
* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
* Copyright (C) 2016-2017 Glider bvba
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/delay.h>
diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index fbfa5b4cc567..a43276c76fc6 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* HT16K33 driver
*
* Author: Robin van der Gracht <robin@protonic.nl>
*
* Copyright: (C) 2016 Protonic Holland.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
*/
#include <linux/kernel.h>
diff --git a/drivers/auxdisplay/ks0108.c b/drivers/auxdisplay/ks0108.c
index 816de9eaac26..abfe3fa9e6f4 100644
--- a/drivers/auxdisplay/ks0108.c
+++ b/drivers/auxdisplay/ks0108.c
@@ -1,26 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Filename: ks0108.c
* Version: 0.1.0
* Description: ks0108 LCD Controller driver
- * License: GPLv2
* Depends: parport
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index ec5e8800f8ad..3b25a643058c 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Front panel driver for Linux
* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
* Copyright (C) 2016-2017 Glider bvba
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
* This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
* connected to a parallel printer port.
*
diff --git a/include/linux/cfag12864b.h b/include/linux/cfag12864b.h
index b454dfce60d9..4060004968c8 100644
--- a/include/linux/cfag12864b.h
+++ b/include/linux/cfag12864b.h
@@ -1,25 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Filename: cfag12864b.h
* Version: 0.1.0
* Description: cfag12864b LCD driver header
- * License: GPLv2
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-12
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#ifndef _CFAG12864B_H_
diff --git a/include/linux/ks0108.h b/include/linux/ks0108.h
index cb311798e0bc..0738389b42b6 100644
--- a/include/linux/ks0108.h
+++ b/include/linux/ks0108.h
@@ -1,25 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Filename: ks0108.h
* Version: 0.1.0
* Description: ks0108 LCD Controller driver header
- * License: GPLv2
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#ifndef _KS0108_H_
diff --git a/samples/auxdisplay/cfag12864b-example.c b/samples/auxdisplay/cfag12864b-example.c
index e7823ffb1ca0..85571e90191f 100644
--- a/samples/auxdisplay/cfag12864b-example.c
+++ b/samples/auxdisplay/cfag12864b-example.c
@@ -1,25 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Filename: cfag12864b-example.c
* Version: 0.1.0
* Description: cfag12864b LCD userspace example program
- * License: GPLv2
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
/*
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 10:41:36 +0300