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Mostly small fixes and cleanups, plus a non-trivial fix for charlcd

Browse Source 
- charlcd: fixes and cleanups
     From Robert Abel and Sean Young
 
   - Kconfig fixes
     From Randy Dunlap, Corentin Labbe and Ulf Magnusson
 
   - cfag12864bfb: const cleanup
     From Gustavo A. R. Silva
 
   - Docs/licenses/warnings cleanups
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Merge tag 'auxdisplay-for-linus-v4.18-rc1' of git://github.com/ojeda/linux

Pull auxdisplay updates from Miguel Ojeda:
 "Mostly small fixes and cleanups, plus a non-trivial fix for charlcd

  - charlcd: fixes and cleanups (Robert Abel and Sean Young)

  - Kconfig fixes (Randy Dunlap, Corentin Labbe and Ulf Magnusson)

  - cfag12864bfb: const cleanup (Gustavo A. R. Silva)

  - Docs/licenses/warnings cleanups"

* tag 'auxdisplay-for-linus-v4.18-rc1' of git://github.com/ojeda/linux:
  auxdisplay: Replace licenses with SPDX identifiers
  auxdisplay: make PANEL a menuconfig
  auxdisplay: fix broken menu
  auxdisplay: charlcd: Fix and clean up handling of x/y commands
  auxdisplay: charlcd: fix hex literal ranges for graphics command
  auxdisplay: charlcd: fix two-line command ^[[LN not marked as processed
  auxdisplay: charlcd: replace octal literal with form-feed escape sequence
  auxdisplay: charlcd: use null character instead of zero literal to terminate strings
  auxdisplay: charlcd: no need to call charlcd_gotoxy() if nothing changes
  auxdisplay: cfag12864bfb: constify fb_fix_screeninfo and fb_var_screeninfo structures
  auxdisplay: img-ascii-lcd: fix typo on select SYSCON/MFD_SYSCON
  auxdisplay: img-ascii-lcd: kconfig: Remove MIPS_SEAD3 reference
  auxdisplay: arm-charlcd: Fix struct charlcd doc line
  MAINTAINERS: auxdisplay: remove obsolete webpages
  Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/
This commit is contained in:
Linus Torvalds 2018-06-07 14:01:16 -07:00
commit 7423fd7a66
14 changed files with 111 additions and 158 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

0
Documentation/misc-devices/lcd-panel-cgram.txt → Documentation/auxdisplay/lcd-panel-cgram.txt
View File

8
MAINTAINERS
View File

@ -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

16
drivers/auxdisplay/Kconfig
View File

@ -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

4
drivers/auxdisplay/arm-charlcd.c
View File

@ -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;

16
drivers/auxdisplay/cfag12864b.c
View File

@ -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>

20
drivers/auxdisplay/cfag12864bfb.c
View File

@ -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,

119
drivers/auxdisplay/charlcd.c
View File

@ -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)
@ -292,6 +290,79 @@ static int charlcd_init_display(struct charlcd *lcd)
return 0;
}
/*
* 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
@ -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;
/* If the command is valid, move to the new address */
if (parse_xy(esc, &priv->addr.x, &priv->addr.y))
charlcd_gotoxy(lcd);
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;
}
}
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;

6
drivers/auxdisplay/hd44780.c
View File

@ -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>

10
drivers/auxdisplay/ht16k33.c
View File

@ -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>

16
drivers/auxdisplay/ks0108.c
View File

@ -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

6
drivers/auxdisplay/panel.c
View File

@ -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.
*

16
include/linux/cfag12864b.h
View File

@ -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_

16
include/linux/ks0108.h
View File

@ -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_

16
samples/auxdisplay/cfag12864b-example.c
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@ -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
*
*/
/*