[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/Kconfig b/src/kernel/linux/v4.14/drivers/auxdisplay/Kconfig
new file mode 100644
index 0000000..f941375
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/Kconfig
@@ -0,0 +1,450 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+# Auxiliary display drivers configuration.
+#
+
+menuconfig AUXDISPLAY
+ bool "Auxiliary Display support"
+ ---help---
+ Say Y here to get to see options for auxiliary display drivers.
+ This option alone does not add any kernel code.
+
+ If you say N, all options in this submenu will be skipped and disabled.
+
+if AUXDISPLAY
+
+config HD44780
+ tristate "HD44780 Character LCD support"
+ depends on GPIOLIB || COMPILE_TEST
+ select CHARLCD
+ ---help---
+ Enable support for Character LCDs using a HD44780 controller.
+ The LCD is accessible through the /dev/lcd char device (10, 156).
+ This code can either be compiled as a module, or linked into the
+ kernel and started at boot.
+ If you don't understand what all this is about, say N.
+
+config KS0108
+ tristate "KS0108 LCD Controller"
+ depends on PARPORT_PC
+ default n
+ ---help---
+ If you have a LCD controlled by one or more KS0108
+ controllers, say Y. You will need also another more specific
+ driver for your LCD.
+
+ Depends on Parallel Port support. If you say Y at
+ parport, you will be able to compile this as a module (M)
+ and built-in as well (Y).
+
+ To compile this as a module, choose M here:
+ the module will be called ks0108.
+
+ If unsure, say N.
+
+config KS0108_PORT
+ hex "Parallel port where the LCD is connected"
+ depends on KS0108
+ default 0x378
+ ---help---
+ The address of the parallel port where the LCD is connected.
+
+ The first standard parallel port address is 0x378.
+ The second standard parallel port address is 0x278.
+ The third standard parallel port address is 0x3BC.
+
+ You can specify a different address if you need.
+
+ If you don't know what I'm talking about, load the parport module,
+ and execute "dmesg" or "cat /proc/ioports". You can see there how
+ many parallel ports are present and which address each one has.
+
+ Usually you only need to use 0x378.
+
+ If you compile this as a module, you can still override this
+ using the module parameters.
+
+config KS0108_DELAY
+ int "Delay between each control writing (microseconds)"
+ depends on KS0108
+ default "2"
+ ---help---
+ Amount of time the ks0108 should wait between each control write
+ to the parallel port.
+
+ If your LCD seems to miss random writings, increment this.
+
+ If you don't know what I'm talking about, ignore it.
+
+ If you compile this as a module, you can still override this
+ value using the module parameters.
+
+config CFAG12864B
+ tristate "CFAG12864B LCD"
+ depends on X86
+ depends on FB
+ depends on KS0108
+ select FB_SYS_FILLRECT
+ select FB_SYS_COPYAREA
+ select FB_SYS_IMAGEBLIT
+ select FB_SYS_FOPS
+ default n
+ ---help---
+ If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
+ say Y. You also need the ks0108 LCD Controller driver.
+
+ For help about how to wire your LCD to the parallel port,
+ check Documentation/auxdisplay/cfag12864b
+
+ Depends on the x86 arch and the framebuffer support.
+
+ The LCD framebuffer driver can be attached to a console.
+ It will work fine. However, you can't attach it to the fbdev driver
+ of the xorg server.
+
+ To compile this as a module, choose M here:
+ the modules will be called cfag12864b and cfag12864bfb.
+
+ If unsure, say N.
+
+config CFAG12864B_RATE
+ int "Refresh rate (hertz)"
+ depends on CFAG12864B
+ default "20"
+ ---help---
+ Refresh rate of the LCD.
+
+ As the LCD is not memory mapped, the driver has to make the work by
+ software. This means you should be careful setting this value higher.
+ If your CPUs are really slow or you feel the system is slowed down,
+ decrease the value.
+
+ Be careful modifying this value to a very high value:
+ You can freeze the computer, or the LCD maybe can't draw as fast as you
+ are requesting.
+
+ If you don't know what I'm talking about, ignore it.
+
+ If you compile this as a module, you can still override this
+ value using the module parameters.
+
+config IMG_ASCII_LCD
+ tristate "Imagination Technologies ASCII LCD Display"
+ depends on HAS_IOMEM
+ default y if MIPS_MALTA || MIPS_SEAD3
+ select SYSCON
+ help
+ Enable this to support the simple ASCII LCD displays found on
+ development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3
+ from Imagination Technologies.
+
+config HT16K33
+ tristate "Holtek Ht16K33 LED controller with keyscan"
+ depends on FB && OF && I2C && INPUT
+ select FB_SYS_FOPS
+ select FB_SYS_FILLRECT
+ select FB_SYS_COPYAREA
+ select FB_SYS_IMAGEBLIT
+ select INPUT_MATRIXKMAP
+ select FB_BACKLIGHT
+ help
+ Say yes here to add support for Holtek HT16K33, RAM mapping 16*8
+ LED controller driver with keyscan.
+
+config ARM_CHARLCD
+ bool "ARM Ltd. Character LCD Driver"
+ depends on PLAT_VERSATILE
+ help
+ This is a driver for the character LCD found on the ARM Ltd.
+ Versatile and RealView Platform Baseboards. It doesn't do
+ very much more than display the text "ARM Linux" on the first
+ line and the Linux version on the second line, but that's
+ still useful.
+
+endif # AUXDISPLAY
+
+config PANEL
+ tristate "Parallel port LCD/Keypad Panel support"
+ depends on PARPORT
+ select CHARLCD
+ ---help---
+ Say Y here if you have an HD44780 or KS-0074 LCD connected to your
+ parallel port. This driver also features 4 and 6-key keypads. The LCD
+ is accessible through the /dev/lcd char device (10, 156), and the
+ keypad through /dev/keypad (10, 185). This code can either be
+ compiled as a module, or linked into the kernel and started at boot.
+ If you don't understand what all this is about, say N.
+
+if PANEL
+
+config PANEL_PARPORT
+ int "Default parallel port number (0=LPT1)"
+ range 0 255
+ default "0"
+ ---help---
+ This is the index of the parallel port the panel is connected to. One
+ driver instance only supports one parallel port, so if your keypad
+ and LCD are connected to two separate ports, you have to start two
+ modules with different arguments. Numbering starts with '0' for LPT1,
+ and so on.
+
+config PANEL_PROFILE
+ int "Default panel profile (0-5, 0=custom)"
+ range 0 5
+ default "5"
+ ---help---
+ To ease configuration, the driver supports different configuration
+ profiles for past and recent wirings. These profiles can also be
+ used to define an approximative configuration, completed by a few
+ other options. Here are the profiles :
+
+ 0 = custom (see further)
+ 1 = 2x16 parallel LCD, old keypad
+ 2 = 2x16 serial LCD (KS-0074), new keypad
+ 3 = 2x16 parallel LCD (Hantronix), no keypad
+ 4 = 2x16 parallel LCD (Nexcom NSA1045) with Nexcom's keypad
+ 5 = 2x40 parallel LCD (old one), with old keypad
+
+ Custom configurations allow you to define how your display is
+ wired to the parallel port, and how it works. This is only intended
+ for experts.
+
+config PANEL_KEYPAD
+ depends on PANEL_PROFILE="0"
+ int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)"
+ range 0 3
+ default 0
+ ---help---
+ This enables and configures a keypad connected to the parallel port.
+ The keys will be read from character device 10,185. Valid values are :
+
+ 0 : do not enable this driver
+ 1 : old 6 keys keypad
+ 2 : new 6 keys keypad, as used on the server at www.ant-computing.com
+ 3 : Nexcom NSA1045's 4 keys keypad
+
+ New profiles can be described in the driver source. The driver also
+ supports simultaneous keys pressed when the keypad supports them.
+
+config PANEL_LCD
+ depends on PANEL_PROFILE="0"
+ int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)"
+ range 0 5
+ default 0
+ ---help---
+ This enables and configures an LCD connected to the parallel port.
+ The driver includes an interpreter for escape codes starting with
+ '\e[L' which are specific to the LCD, and a few ANSI codes. The
+ driver will be registered as character device 10,156, usually
+ under the name '/dev/lcd'. There are a total of 6 supported types :
+
+ 0 : do not enable the driver
+ 1 : custom configuration and wiring (see further)
+ 2 : 2x16 & 2x40 parallel LCD (old wiring)
+ 3 : 2x16 serial LCD (KS-0074 based)
+ 4 : 2x16 parallel LCD (Hantronix wiring)
+ 5 : 2x16 parallel LCD (Nexcom wiring)
+
+ When type '1' is specified, other options will appear to configure
+ more precise aspects (wiring, dimensions, protocol, ...). Please note
+ that those values changed from the 2.4 driver for better consistency.
+
+config PANEL_LCD_HEIGHT
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "Number of lines on the LCD (1-2)"
+ range 1 2
+ default 2
+ ---help---
+ This is the number of visible character lines on the LCD in custom profile.
+ It can either be 1 or 2.
+
+config PANEL_LCD_WIDTH
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "Number of characters per line on the LCD (1-40)"
+ range 1 40
+ default 40
+ ---help---
+ This is the number of characters per line on the LCD in custom profile.
+ Common values are 16,20,24,40.
+
+config PANEL_LCD_BWIDTH
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "Internal LCD line width (1-40, 40 by default)"
+ range 1 40
+ default 40
+ ---help---
+ Most LCDs use a standard controller which supports hardware lines of 40
+ characters, although sometimes only 16, 20 or 24 of them are really wired
+ to the terminal. This results in some non-visible but addressable characters,
+ and is the case for most parallel LCDs. Other LCDs, and some serial ones,
+ however, use the same line width internally as what is visible. The KS0074
+ for example, uses 16 characters per line for 16 visible characters per line.
+
+ This option lets you configure the value used by your LCD in 'custom' profile.
+ If you don't know, put '40' here.
+
+config PANEL_LCD_HWIDTH
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "Hardware LCD line width (1-64, 64 by default)"
+ range 1 64
+ default 64
+ ---help---
+ Most LCDs use a single address bit to differentiate line 0 and line 1. Since
+ some of them need to be able to address 40 chars with the lower bits, they
+ often use the immediately superior power of 2, which is 64, to address the
+ next line.
+
+ If you don't know what your LCD uses, in doubt let 16 here for a 2x16, and
+ 64 here for a 2x40.
+
+config PANEL_LCD_CHARSET
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "LCD character set (0=normal, 1=KS0074)"
+ range 0 1
+ default 0
+ ---help---
+ Some controllers such as the KS0074 use a somewhat strange character set
+ where many symbols are at unusual places. The driver knows how to map
+ 'standard' ASCII characters to the character sets used by these controllers.
+ Valid values are :
+
+ 0 : normal (untranslated) character set
+ 1 : KS0074 character set
+
+ If you don't know, use the normal one (0).
+
+config PANEL_LCD_PROTO
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "LCD communication mode (0=parallel 8 bits, 1=serial)"
+ range 0 1
+ default 0
+ ---help---
+ This driver now supports any serial or parallel LCD wired to a parallel
+ port. But before assigning signals, the driver needs to know if it will
+ be driving a serial LCD or a parallel one. Serial LCDs only use 2 wires
+ (SDA/SCL), while parallel ones use 2 or 3 wires for the control signals
+ (E, RS, sometimes RW), and 4 or 8 for the data. Use 0 here for a 8 bits
+ parallel LCD, and 1 for a serial LCD.
+
+config PANEL_LCD_PIN_E
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+ int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) "
+ range -17 17
+ default 14
+ ---help---
+ This describes the number of the parallel port pin to which the LCD 'E'
+ signal has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'E' pin in custom profile is '14' (AUTOFEED).
+
+config PANEL_LCD_PIN_RS
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+ int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) "
+ range -17 17
+ default 17
+ ---help---
+ This describes the number of the parallel port pin to which the LCD 'RS'
+ signal has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'RS' pin in custom profile is '17' (SELECT IN).
+
+config PANEL_LCD_PIN_RW
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+ int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) "
+ range -17 17
+ default 16
+ ---help---
+ This describes the number of the parallel port pin to which the LCD 'RW'
+ signal has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'RW' pin in custom profile is '16' (INIT).
+
+config PANEL_LCD_PIN_SCL
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
+ int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) "
+ range -17 17
+ default 1
+ ---help---
+ This describes the number of the parallel port pin to which the serial
+ LCD 'SCL' signal has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'SCL' pin in custom profile is '1' (STROBE).
+
+config PANEL_LCD_PIN_SDA
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
+ int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) "
+ range -17 17
+ default 2
+ ---help---
+ This describes the number of the parallel port pin to which the serial
+ LCD 'SDA' signal has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'SDA' pin in custom profile is '2' (D0).
+
+config PANEL_LCD_PIN_BL
+ depends on PANEL_PROFILE="0" && PANEL_LCD="1"
+ int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) "
+ range -17 17
+ default 0
+ ---help---
+ This describes the number of the parallel port pin to which the LCD 'BL' signal
+ has been connected. It can be :
+
+ 0 : no connection (eg: connected to ground)
+ 1..17 : directly connected to any of these pins on the DB25 plug
+ -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+ Default for the 'BL' pin in custom profile is '0' (uncontrolled).
+
+config PANEL_CHANGE_MESSAGE
+ bool "Change LCD initialization message ?"
+ default "n"
+ ---help---
+ This allows you to replace the boot message indicating the kernel version
+ and the driver version with a custom message. This is useful on appliances
+ where a simple 'Starting system' message can be enough to stop a customer
+ from worrying.
+
+ If you say 'Y' here, you'll be able to choose a message yourself. Otherwise,
+ say 'N' and keep the default message with the version.
+
+config PANEL_BOOT_MESSAGE
+ depends on PANEL_CHANGE_MESSAGE="y"
+ string "New initialization message"
+ default ""
+ ---help---
+ This allows you to replace the boot message indicating the kernel version
+ and the driver version with a custom message. This is useful on appliances
+ where a simple 'Starting system' message can be enough to stop a customer
+ from worrying.
+
+ An empty message will only clear the display at driver init time. Any other
+ 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/src/kernel/linux/v4.14/drivers/auxdisplay/Makefile b/src/kernel/linux/v4.14/drivers/auxdisplay/Makefile
new file mode 100644
index 0000000..7ac6776
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the kernel auxiliary displays device drivers.
+#
+
+obj-$(CONFIG_CHARLCD) += charlcd.o
+obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o
+obj-$(CONFIG_KS0108) += ks0108.o
+obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o
+obj-$(CONFIG_IMG_ASCII_LCD) += img-ascii-lcd.o
+obj-$(CONFIG_HD44780) += hd44780.o
+obj-$(CONFIG_HT16K33) += ht16k33.o
+obj-$(CONFIG_PANEL) += panel.o
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/arm-charlcd.c b/src/kernel/linux/v4.14/drivers/auxdisplay/arm-charlcd.c
new file mode 100644
index 0000000..b3176ee
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/arm-charlcd.c
@@ -0,0 +1,368 @@
+/*
+ * 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>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <generated/utsrelease.h>
+
+#define DRIVERNAME "arm-charlcd"
+#define CHARLCD_TIMEOUT (msecs_to_jiffies(1000))
+
+/* Offsets to registers */
+#define CHAR_COM 0x00U
+#define CHAR_DAT 0x04U
+#define CHAR_RD 0x08U
+#define CHAR_RAW 0x0CU
+#define CHAR_MASK 0x10U
+#define CHAR_STAT 0x14U
+
+#define CHAR_RAW_CLEAR 0x00000000U
+#define CHAR_RAW_VALID 0x00000100U
+
+/* Hitachi HD44780 display commands */
+#define HD_CLEAR 0x01U
+#define HD_HOME 0x02U
+#define HD_ENTRYMODE 0x04U
+#define HD_ENTRYMODE_INCREMENT 0x02U
+#define HD_ENTRYMODE_SHIFT 0x01U
+#define HD_DISPCTRL 0x08U
+#define HD_DISPCTRL_ON 0x04U
+#define HD_DISPCTRL_CURSOR_ON 0x02U
+#define HD_DISPCTRL_CURSOR_BLINK 0x01U
+#define HD_CRSR_SHIFT 0x10U
+#define HD_CRSR_SHIFT_DISPLAY 0x08U
+#define HD_CRSR_SHIFT_DISPLAY_RIGHT 0x04U
+#define HD_FUNCSET 0x20U
+#define HD_FUNCSET_8BIT 0x10U
+#define HD_FUNCSET_2_LINES 0x08U
+#define HD_FUNCSET_FONT_5X10 0x04U
+#define HD_SET_CGRAM 0x40U
+#define HD_SET_DDRAM 0x80U
+#define HD_BUSY_FLAG 0x80U
+
+/**
+ * @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
+ */
+struct charlcd {
+ struct device *dev;
+ u32 phybase;
+ u32 physize;
+ void __iomem *virtbase;
+ int irq;
+ struct completion complete;
+ struct delayed_work init_work;
+};
+
+static irqreturn_t charlcd_interrupt(int irq, void *data)
+{
+ struct charlcd *lcd = data;
+ u8 status;
+
+ status = readl(lcd->virtbase + CHAR_STAT) & 0x01;
+ /* Clear IRQ */
+ writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
+ if (status)
+ complete(&lcd->complete);
+ else
+ dev_info(lcd->dev, "Spurious IRQ (%02x)\n", status);
+ return IRQ_HANDLED;
+}
+
+
+static void charlcd_wait_complete_irq(struct charlcd *lcd)
+{
+ int ret;
+
+ ret = wait_for_completion_interruptible_timeout(&lcd->complete,
+ CHARLCD_TIMEOUT);
+ /* Disable IRQ after completion */
+ writel(0x00, lcd->virtbase + CHAR_MASK);
+
+ if (ret < 0) {
+ dev_err(lcd->dev,
+ "wait_for_completion_interruptible_timeout() "
+ "returned %d waiting for ready\n", ret);
+ return;
+ }
+
+ if (ret == 0) {
+ dev_err(lcd->dev, "charlcd controller timed out "
+ "waiting for ready\n");
+ return;
+ }
+}
+
+static u8 charlcd_4bit_read_char(struct charlcd *lcd)
+{
+ u8 data;
+ u32 val;
+ int i;
+
+ /* If we can, use an IRQ to wait for the data, else poll */
+ if (lcd->irq >= 0)
+ charlcd_wait_complete_irq(lcd);
+ else {
+ i = 0;
+ val = 0;
+ while (!(val & CHAR_RAW_VALID) && i < 10) {
+ udelay(100);
+ val = readl(lcd->virtbase + CHAR_RAW);
+ i++;
+ }
+
+ writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
+ }
+ msleep(1);
+
+ /* Read the 4 high bits of the data */
+ data = readl(lcd->virtbase + CHAR_RD) & 0xf0;
+
+ /*
+ * The second read for the low bits does not trigger an IRQ
+ * so in this case we have to poll for the 4 lower bits
+ */
+ i = 0;
+ val = 0;
+ while (!(val & CHAR_RAW_VALID) && i < 10) {
+ udelay(100);
+ val = readl(lcd->virtbase + CHAR_RAW);
+ i++;
+ }
+ writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
+ msleep(1);
+
+ /* Read the 4 low bits of the data */
+ data |= (readl(lcd->virtbase + CHAR_RD) >> 4) & 0x0f;
+
+ return data;
+}
+
+static bool charlcd_4bit_read_bf(struct charlcd *lcd)
+{
+ if (lcd->irq >= 0) {
+ /*
+ * If we'll use IRQs to wait for the busyflag, clear any
+ * pending flag and enable IRQ
+ */
+ writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
+ init_completion(&lcd->complete);
+ writel(0x01, lcd->virtbase + CHAR_MASK);
+ }
+ readl(lcd->virtbase + CHAR_COM);
+ return charlcd_4bit_read_char(lcd) & HD_BUSY_FLAG ? true : false;
+}
+
+static void charlcd_4bit_wait_busy(struct charlcd *lcd)
+{
+ int retries = 50;
+
+ udelay(100);
+ while (charlcd_4bit_read_bf(lcd) && retries)
+ retries--;
+ if (!retries)
+ dev_err(lcd->dev, "timeout waiting for busyflag\n");
+}
+
+static void charlcd_4bit_command(struct charlcd *lcd, u8 cmd)
+{
+ u32 cmdlo = (cmd << 4) & 0xf0;
+ u32 cmdhi = (cmd & 0xf0);
+
+ writel(cmdhi, lcd->virtbase + CHAR_COM);
+ udelay(10);
+ writel(cmdlo, lcd->virtbase + CHAR_COM);
+ charlcd_4bit_wait_busy(lcd);
+}
+
+static void charlcd_4bit_char(struct charlcd *lcd, u8 ch)
+{
+ u32 chlo = (ch << 4) & 0xf0;
+ u32 chhi = (ch & 0xf0);
+
+ writel(chhi, lcd->virtbase + CHAR_DAT);
+ udelay(10);
+ writel(chlo, lcd->virtbase + CHAR_DAT);
+ charlcd_4bit_wait_busy(lcd);
+}
+
+static void charlcd_4bit_print(struct charlcd *lcd, int line, const char *str)
+{
+ u8 offset;
+ int i;
+
+ /*
+ * We support line 0, 1
+ * Line 1 runs from 0x00..0x27
+ * Line 2 runs from 0x28..0x4f
+ */
+ if (line == 0)
+ offset = 0;
+ else if (line == 1)
+ offset = 0x28;
+ else
+ return;
+
+ /* Set offset */
+ charlcd_4bit_command(lcd, HD_SET_DDRAM | offset);
+
+ /* Send string */
+ for (i = 0; i < strlen(str) && i < 0x28; i++)
+ charlcd_4bit_char(lcd, str[i]);
+}
+
+static void charlcd_4bit_init(struct charlcd *lcd)
+{
+ /* These commands cannot be checked with the busy flag */
+ writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
+ msleep(5);
+ writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
+ udelay(100);
+ writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
+ udelay(100);
+ /* Go to 4bit mode */
+ writel(HD_FUNCSET, lcd->virtbase + CHAR_COM);
+ udelay(100);
+ /*
+ * 4bit mode, 2 lines, 5x8 font, after this the number of lines
+ * and the font cannot be changed until the next initialization sequence
+ */
+ charlcd_4bit_command(lcd, HD_FUNCSET | HD_FUNCSET_2_LINES);
+ charlcd_4bit_command(lcd, HD_DISPCTRL | HD_DISPCTRL_ON);
+ charlcd_4bit_command(lcd, HD_ENTRYMODE | HD_ENTRYMODE_INCREMENT);
+ charlcd_4bit_command(lcd, HD_CLEAR);
+ charlcd_4bit_command(lcd, HD_HOME);
+ /* Put something useful in the display */
+ charlcd_4bit_print(lcd, 0, "ARM Linux");
+ charlcd_4bit_print(lcd, 1, UTS_RELEASE);
+}
+
+static void charlcd_init_work(struct work_struct *work)
+{
+ struct charlcd *lcd =
+ container_of(work, struct charlcd, init_work.work);
+
+ charlcd_4bit_init(lcd);
+}
+
+static int __init charlcd_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct charlcd *lcd;
+ struct resource *res;
+
+ lcd = kzalloc(sizeof(struct charlcd), GFP_KERNEL);
+ if (!lcd)
+ return -ENOMEM;
+
+ lcd->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENOENT;
+ goto out_no_resource;
+ }
+ lcd->phybase = res->start;
+ lcd->physize = resource_size(res);
+
+ if (request_mem_region(lcd->phybase, lcd->physize,
+ DRIVERNAME) == NULL) {
+ ret = -EBUSY;
+ goto out_no_memregion;
+ }
+
+ lcd->virtbase = ioremap(lcd->phybase, lcd->physize);
+ if (!lcd->virtbase) {
+ ret = -ENOMEM;
+ goto out_no_memregion;
+ }
+
+ lcd->irq = platform_get_irq(pdev, 0);
+ /* If no IRQ is supplied, we'll survive without it */
+ if (lcd->irq >= 0) {
+ if (request_irq(lcd->irq, charlcd_interrupt, 0,
+ DRIVERNAME, lcd)) {
+ ret = -EIO;
+ goto out_no_irq;
+ }
+ }
+
+ platform_set_drvdata(pdev, lcd);
+
+ /*
+ * Initialize the display in a delayed work, because
+ * it is VERY slow and would slow down the boot of the system.
+ */
+ INIT_DELAYED_WORK(&lcd->init_work, charlcd_init_work);
+ schedule_delayed_work(&lcd->init_work, 0);
+
+ dev_info(&pdev->dev, "initialized ARM character LCD at %08x\n",
+ lcd->phybase);
+
+ return 0;
+
+out_no_irq:
+ iounmap(lcd->virtbase);
+out_no_memregion:
+ release_mem_region(lcd->phybase, SZ_4K);
+out_no_resource:
+ kfree(lcd);
+ return ret;
+}
+
+static int charlcd_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct charlcd *lcd = platform_get_drvdata(pdev);
+
+ /* Power the display off */
+ charlcd_4bit_command(lcd, HD_DISPCTRL);
+ return 0;
+}
+
+static int charlcd_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct charlcd *lcd = platform_get_drvdata(pdev);
+
+ /* Turn the display back on */
+ charlcd_4bit_command(lcd, HD_DISPCTRL | HD_DISPCTRL_ON);
+ return 0;
+}
+
+static const struct dev_pm_ops charlcd_pm_ops = {
+ .suspend = charlcd_suspend,
+ .resume = charlcd_resume,
+};
+
+static const struct of_device_id charlcd_match[] = {
+ { .compatible = "arm,versatile-lcd", },
+ {}
+};
+
+static struct platform_driver charlcd_driver = {
+ .driver = {
+ .name = DRIVERNAME,
+ .pm = &charlcd_pm_ops,
+ .suppress_bind_attrs = true,
+ .of_match_table = of_match_ptr(charlcd_match),
+ },
+};
+builtin_platform_driver_probe(charlcd_driver, charlcd_probe);
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864b.c b/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864b.c
new file mode 100644
index 0000000..41ce4bd
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864b.c
@@ -0,0 +1,394 @@
+/*
+ * 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>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/jiffies.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/workqueue.h>
+#include <linux/ks0108.h>
+#include <linux/cfag12864b.h>
+
+
+#define CFAG12864B_NAME "cfag12864b"
+
+/*
+ * Module Parameters
+ */
+
+static unsigned int cfag12864b_rate = CONFIG_CFAG12864B_RATE;
+module_param(cfag12864b_rate, uint, S_IRUGO);
+MODULE_PARM_DESC(cfag12864b_rate,
+ "Refresh rate (hertz)");
+
+unsigned int cfag12864b_getrate(void)
+{
+ return cfag12864b_rate;
+}
+
+/*
+ * cfag12864b Commands
+ *
+ * E = Enable signal
+ * Every time E switch from low to high,
+ * cfag12864b/ks0108 reads the command/data.
+ *
+ * CS1 = First ks0108controller.
+ * If high, the first ks0108 controller receives commands/data.
+ *
+ * CS2 = Second ks0108 controller
+ * If high, the second ks0108 controller receives commands/data.
+ *
+ * DI = Data/Instruction
+ * If low, cfag12864b will expect commands.
+ * If high, cfag12864b will expect data.
+ *
+ */
+
+#define bit(n) (((unsigned char)1)<<(n))
+
+#define CFAG12864B_BIT_E (0)
+#define CFAG12864B_BIT_CS1 (2)
+#define CFAG12864B_BIT_CS2 (1)
+#define CFAG12864B_BIT_DI (3)
+
+static unsigned char cfag12864b_state;
+
+static void cfag12864b_set(void)
+{
+ ks0108_writecontrol(cfag12864b_state);
+}
+
+static void cfag12864b_setbit(unsigned char state, unsigned char n)
+{
+ if (state)
+ cfag12864b_state |= bit(n);
+ else
+ cfag12864b_state &= ~bit(n);
+}
+
+static void cfag12864b_e(unsigned char state)
+{
+ cfag12864b_setbit(state, CFAG12864B_BIT_E);
+ cfag12864b_set();
+}
+
+static void cfag12864b_cs1(unsigned char state)
+{
+ cfag12864b_setbit(state, CFAG12864B_BIT_CS1);
+}
+
+static void cfag12864b_cs2(unsigned char state)
+{
+ cfag12864b_setbit(state, CFAG12864B_BIT_CS2);
+}
+
+static void cfag12864b_di(unsigned char state)
+{
+ cfag12864b_setbit(state, CFAG12864B_BIT_DI);
+}
+
+static void cfag12864b_setcontrollers(unsigned char first,
+ unsigned char second)
+{
+ if (first)
+ cfag12864b_cs1(0);
+ else
+ cfag12864b_cs1(1);
+
+ if (second)
+ cfag12864b_cs2(0);
+ else
+ cfag12864b_cs2(1);
+}
+
+static void cfag12864b_controller(unsigned char which)
+{
+ if (which == 0)
+ cfag12864b_setcontrollers(1, 0);
+ else if (which == 1)
+ cfag12864b_setcontrollers(0, 1);
+}
+
+static void cfag12864b_displaystate(unsigned char state)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_displaystate(state);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_address(unsigned char address)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_address(address);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_page(unsigned char page)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_page(page);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_startline(unsigned char startline)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_startline(startline);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_writebyte(unsigned char byte)
+{
+ cfag12864b_di(1);
+ cfag12864b_e(1);
+ ks0108_writedata(byte);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_nop(void)
+{
+ cfag12864b_startline(0);
+}
+
+/*
+ * cfag12864b Internal Commands
+ */
+
+static void cfag12864b_on(void)
+{
+ cfag12864b_setcontrollers(1, 1);
+ cfag12864b_displaystate(1);
+}
+
+static void cfag12864b_off(void)
+{
+ cfag12864b_setcontrollers(1, 1);
+ cfag12864b_displaystate(0);
+}
+
+static void cfag12864b_clear(void)
+{
+ unsigned char i, j;
+
+ cfag12864b_setcontrollers(1, 1);
+ for (i = 0; i < CFAG12864B_PAGES; i++) {
+ cfag12864b_page(i);
+ cfag12864b_address(0);
+ for (j = 0; j < CFAG12864B_ADDRESSES; j++)
+ cfag12864b_writebyte(0);
+ }
+}
+
+/*
+ * Update work
+ */
+
+unsigned char *cfag12864b_buffer;
+static unsigned char *cfag12864b_cache;
+static DEFINE_MUTEX(cfag12864b_mutex);
+static unsigned char cfag12864b_updating;
+static void cfag12864b_update(struct work_struct *delayed_work);
+static struct workqueue_struct *cfag12864b_workqueue;
+static DECLARE_DELAYED_WORK(cfag12864b_work, cfag12864b_update);
+
+static void cfag12864b_queue(void)
+{
+ queue_delayed_work(cfag12864b_workqueue, &cfag12864b_work,
+ HZ / cfag12864b_rate);
+}
+
+unsigned char cfag12864b_enable(void)
+{
+ unsigned char ret;
+
+ mutex_lock(&cfag12864b_mutex);
+
+ if (!cfag12864b_updating) {
+ cfag12864b_updating = 1;
+ cfag12864b_queue();
+ ret = 0;
+ } else
+ ret = 1;
+
+ mutex_unlock(&cfag12864b_mutex);
+
+ return ret;
+}
+
+void cfag12864b_disable(void)
+{
+ mutex_lock(&cfag12864b_mutex);
+
+ if (cfag12864b_updating) {
+ cfag12864b_updating = 0;
+ cancel_delayed_work(&cfag12864b_work);
+ flush_workqueue(cfag12864b_workqueue);
+ }
+
+ mutex_unlock(&cfag12864b_mutex);
+}
+
+unsigned char cfag12864b_isenabled(void)
+{
+ return cfag12864b_updating;
+}
+
+static void cfag12864b_update(struct work_struct *work)
+{
+ unsigned char c;
+ unsigned short i, j, k, b;
+
+ if (memcmp(cfag12864b_cache, cfag12864b_buffer, CFAG12864B_SIZE)) {
+ for (i = 0; i < CFAG12864B_CONTROLLERS; i++) {
+ cfag12864b_controller(i);
+ cfag12864b_nop();
+ for (j = 0; j < CFAG12864B_PAGES; j++) {
+ cfag12864b_page(j);
+ cfag12864b_nop();
+ cfag12864b_address(0);
+ cfag12864b_nop();
+ for (k = 0; k < CFAG12864B_ADDRESSES; k++) {
+ for (c = 0, b = 0; b < 8; b++)
+ if (cfag12864b_buffer
+ [i * CFAG12864B_ADDRESSES / 8
+ + k / 8 + (j * 8 + b) *
+ CFAG12864B_WIDTH / 8]
+ & bit(k % 8))
+ c |= bit(b);
+ cfag12864b_writebyte(c);
+ }
+ }
+ }
+
+ memcpy(cfag12864b_cache, cfag12864b_buffer, CFAG12864B_SIZE);
+ }
+
+ if (cfag12864b_updating)
+ cfag12864b_queue();
+}
+
+/*
+ * cfag12864b Exported Symbols
+ */
+
+EXPORT_SYMBOL_GPL(cfag12864b_buffer);
+EXPORT_SYMBOL_GPL(cfag12864b_getrate);
+EXPORT_SYMBOL_GPL(cfag12864b_enable);
+EXPORT_SYMBOL_GPL(cfag12864b_disable);
+EXPORT_SYMBOL_GPL(cfag12864b_isenabled);
+
+/*
+ * Is the module inited?
+ */
+
+static unsigned char cfag12864b_inited;
+unsigned char cfag12864b_isinited(void)
+{
+ return cfag12864b_inited;
+}
+EXPORT_SYMBOL_GPL(cfag12864b_isinited);
+
+/*
+ * Module Init & Exit
+ */
+
+static int __init cfag12864b_init(void)
+{
+ int ret = -EINVAL;
+
+ /* ks0108_init() must be called first */
+ if (!ks0108_isinited()) {
+ printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
+ "ks0108 is not initialized\n");
+ goto none;
+ }
+ BUILD_BUG_ON(PAGE_SIZE < CFAG12864B_SIZE);
+
+ cfag12864b_buffer = (unsigned char *) get_zeroed_page(GFP_KERNEL);
+ if (cfag12864b_buffer == NULL) {
+ printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
+ "can't get a free page\n");
+ ret = -ENOMEM;
+ goto none;
+ }
+
+ cfag12864b_cache = kmalloc(sizeof(unsigned char) *
+ CFAG12864B_SIZE, GFP_KERNEL);
+ if (cfag12864b_cache == NULL) {
+ printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
+ "can't alloc cache buffer (%i bytes)\n",
+ CFAG12864B_SIZE);
+ ret = -ENOMEM;
+ goto bufferalloced;
+ }
+
+ cfag12864b_workqueue = create_singlethread_workqueue(CFAG12864B_NAME);
+ if (cfag12864b_workqueue == NULL)
+ goto cachealloced;
+
+ cfag12864b_clear();
+ cfag12864b_on();
+
+ cfag12864b_inited = 1;
+ return 0;
+
+cachealloced:
+ kfree(cfag12864b_cache);
+
+bufferalloced:
+ free_page((unsigned long) cfag12864b_buffer);
+
+none:
+ return ret;
+}
+
+static void __exit cfag12864b_exit(void)
+{
+ cfag12864b_disable();
+ cfag12864b_off();
+ destroy_workqueue(cfag12864b_workqueue);
+ kfree(cfag12864b_cache);
+ free_page((unsigned long) cfag12864b_buffer);
+}
+
+module_init(cfag12864b_init);
+module_exit(cfag12864b_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
+MODULE_DESCRIPTION("cfag12864b LCD driver");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864bfb.c b/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864bfb.c
new file mode 100644
index 0000000..a387403
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/cfag12864bfb.c
@@ -0,0 +1,188 @@
+/*
+ * 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>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+#include <linux/cfag12864b.h>
+
+#define CFAG12864BFB_NAME "cfag12864bfb"
+
+static struct fb_fix_screeninfo cfag12864bfb_fix = {
+ .id = "cfag12864b",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_MONO10,
+ .xpanstep = 0,
+ .ypanstep = 0,
+ .ywrapstep = 0,
+ .line_length = CFAG12864B_WIDTH / 8,
+ .accel = FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo cfag12864bfb_var = {
+ .xres = CFAG12864B_WIDTH,
+ .yres = CFAG12864B_HEIGHT,
+ .xres_virtual = CFAG12864B_WIDTH,
+ .yres_virtual = CFAG12864B_HEIGHT,
+ .bits_per_pixel = 1,
+ .red = { 0, 1, 0 },
+ .green = { 0, 1, 0 },
+ .blue = { 0, 1, 0 },
+ .left_margin = 0,
+ .right_margin = 0,
+ .upper_margin = 0,
+ .lower_margin = 0,
+ .vmode = FB_VMODE_NONINTERLACED,
+};
+
+static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ return vm_insert_page(vma, vma->vm_start,
+ virt_to_page(cfag12864b_buffer));
+}
+
+static struct fb_ops cfag12864bfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_read = fb_sys_read,
+ .fb_write = fb_sys_write,
+ .fb_fillrect = sys_fillrect,
+ .fb_copyarea = sys_copyarea,
+ .fb_imageblit = sys_imageblit,
+ .fb_mmap = cfag12864bfb_mmap,
+};
+
+static int cfag12864bfb_probe(struct platform_device *device)
+{
+ int ret = -EINVAL;
+ struct fb_info *info = framebuffer_alloc(0, &device->dev);
+
+ if (!info)
+ goto none;
+
+ info->screen_base = (char __iomem *) cfag12864b_buffer;
+ info->screen_size = CFAG12864B_SIZE;
+ info->fbops = &cfag12864bfb_ops;
+ info->fix = cfag12864bfb_fix;
+ info->var = cfag12864bfb_var;
+ info->pseudo_palette = NULL;
+ info->par = NULL;
+ info->flags = FBINFO_FLAG_DEFAULT;
+
+ if (register_framebuffer(info) < 0)
+ goto fballoced;
+
+ platform_set_drvdata(device, info);
+
+ fb_info(info, "%s frame buffer device\n", info->fix.id);
+
+ return 0;
+
+fballoced:
+ framebuffer_release(info);
+
+none:
+ return ret;
+}
+
+static int cfag12864bfb_remove(struct platform_device *device)
+{
+ struct fb_info *info = platform_get_drvdata(device);
+
+ if (info) {
+ unregister_framebuffer(info);
+ framebuffer_release(info);
+ }
+
+ return 0;
+}
+
+static struct platform_driver cfag12864bfb_driver = {
+ .probe = cfag12864bfb_probe,
+ .remove = cfag12864bfb_remove,
+ .driver = {
+ .name = CFAG12864BFB_NAME,
+ },
+};
+
+static struct platform_device *cfag12864bfb_device;
+
+static int __init cfag12864bfb_init(void)
+{
+ int ret = -EINVAL;
+
+ /* cfag12864b_init() must be called first */
+ if (!cfag12864b_isinited()) {
+ printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
+ "cfag12864b is not initialized\n");
+ goto none;
+ }
+
+ if (cfag12864b_enable()) {
+ printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
+ "can't enable cfag12864b refreshing (being used)\n");
+ return -ENODEV;
+ }
+
+ ret = platform_driver_register(&cfag12864bfb_driver);
+
+ if (!ret) {
+ cfag12864bfb_device =
+ platform_device_alloc(CFAG12864BFB_NAME, 0);
+
+ if (cfag12864bfb_device)
+ ret = platform_device_add(cfag12864bfb_device);
+ else
+ ret = -ENOMEM;
+
+ if (ret) {
+ platform_device_put(cfag12864bfb_device);
+ platform_driver_unregister(&cfag12864bfb_driver);
+ }
+ }
+
+none:
+ return ret;
+}
+
+static void __exit cfag12864bfb_exit(void)
+{
+ platform_device_unregister(cfag12864bfb_device);
+ platform_driver_unregister(&cfag12864bfb_driver);
+ cfag12864b_disable();
+}
+
+module_init(cfag12864bfb_init);
+module_exit(cfag12864bfb_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
+MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/charlcd.c b/src/kernel/linux/v4.14/drivers/auxdisplay/charlcd.c
new file mode 100644
index 0000000..642afd8
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/charlcd.c
@@ -0,0 +1,825 @@
+/*
+ * 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/delay.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/workqueue.h>
+
+#include <generated/utsrelease.h>
+
+#include <misc/charlcd.h>
+
+#define LCD_MINOR 156
+
+#define DEFAULT_LCD_BWIDTH 40
+#define DEFAULT_LCD_HWIDTH 64
+
+/* Keep the backlight on this many seconds for each flash */
+#define LCD_BL_TEMPO_PERIOD 4
+
+#define LCD_FLAG_B 0x0004 /* Blink on */
+#define LCD_FLAG_C 0x0008 /* Cursor on */
+#define LCD_FLAG_D 0x0010 /* Display on */
+#define LCD_FLAG_F 0x0020 /* Large font mode */
+#define LCD_FLAG_N 0x0040 /* 2-rows mode */
+#define LCD_FLAG_L 0x0080 /* Backlight enabled */
+
+/* LCD commands */
+#define LCD_CMD_DISPLAY_CLEAR 0x01 /* Clear entire display */
+
+#define LCD_CMD_ENTRY_MODE 0x04 /* Set entry mode */
+#define LCD_CMD_CURSOR_INC 0x02 /* Increment cursor */
+
+#define LCD_CMD_DISPLAY_CTRL 0x08 /* Display control */
+#define LCD_CMD_DISPLAY_ON 0x04 /* Set display on */
+#define LCD_CMD_CURSOR_ON 0x02 /* Set cursor on */
+#define LCD_CMD_BLINK_ON 0x01 /* Set blink on */
+
+#define LCD_CMD_SHIFT 0x10 /* Shift cursor/display */
+#define LCD_CMD_DISPLAY_SHIFT 0x08 /* Shift display instead of cursor */
+#define LCD_CMD_SHIFT_RIGHT 0x04 /* Shift display/cursor to the right */
+
+#define LCD_CMD_FUNCTION_SET 0x20 /* Set function */
+#define LCD_CMD_DATA_LEN_8BITS 0x10 /* Set data length to 8 bits */
+#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 */
+
+#define LCD_ESCAPE_LEN 24 /* Max chars for LCD escape command */
+#define LCD_ESCAPE_CHAR 27 /* Use char 27 for escape command */
+
+struct charlcd_priv {
+ struct charlcd lcd;
+
+ struct delayed_work bl_work;
+ struct mutex bl_tempo_lock; /* Protects access to bl_tempo */
+ bool bl_tempo;
+
+ bool must_clear;
+
+ /* contains the LCD config state */
+ unsigned long int flags;
+
+ /* Contains the LCD X and Y offset */
+ struct {
+ unsigned long int x;
+ unsigned long int y;
+ } addr;
+
+ /* Current escape sequence and it's length or -1 if outside */
+ struct {
+ char buf[LCD_ESCAPE_LEN + 1];
+ int len;
+ } esc_seq;
+
+ unsigned long long drvdata[0];
+};
+
+#define to_priv(p) container_of(p, struct charlcd_priv, lcd)
+
+/* Device single-open policy control */
+static atomic_t charlcd_available = ATOMIC_INIT(1);
+
+/* sleeps that many milliseconds with a reschedule */
+static void long_sleep(int ms)
+{
+ if (in_interrupt())
+ mdelay(ms);
+ else
+ schedule_timeout_interruptible(msecs_to_jiffies(ms));
+}
+
+/* turn the backlight on or off */
+static void charlcd_backlight(struct charlcd *lcd, int on)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ if (!lcd->ops->backlight)
+ return;
+
+ mutex_lock(&priv->bl_tempo_lock);
+ if (!priv->bl_tempo)
+ lcd->ops->backlight(lcd, on);
+ mutex_unlock(&priv->bl_tempo_lock);
+}
+
+static void charlcd_bl_off(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct charlcd_priv *priv =
+ container_of(dwork, struct charlcd_priv, bl_work);
+
+ mutex_lock(&priv->bl_tempo_lock);
+ if (priv->bl_tempo) {
+ priv->bl_tempo = false;
+ if (!(priv->flags & LCD_FLAG_L))
+ priv->lcd.ops->backlight(&priv->lcd, 0);
+ }
+ mutex_unlock(&priv->bl_tempo_lock);
+}
+
+/* turn the backlight on for a little while */
+void charlcd_poke(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ if (!lcd->ops->backlight)
+ return;
+
+ cancel_delayed_work_sync(&priv->bl_work);
+
+ mutex_lock(&priv->bl_tempo_lock);
+ if (!priv->bl_tempo && !(priv->flags & LCD_FLAG_L))
+ lcd->ops->backlight(lcd, 1);
+ priv->bl_tempo = true;
+ schedule_delayed_work(&priv->bl_work, LCD_BL_TEMPO_PERIOD * HZ);
+ mutex_unlock(&priv->bl_tempo_lock);
+}
+EXPORT_SYMBOL_GPL(charlcd_poke);
+
+static void charlcd_gotoxy(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+ 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;
+ if (priv->addr.y & 1)
+ addr += lcd->hwidth;
+ if (priv->addr.y & 2)
+ addr += lcd->bwidth;
+ lcd->ops->write_cmd(lcd, LCD_CMD_SET_DDRAM_ADDR | addr);
+}
+
+static void charlcd_home(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ priv->addr.x = 0;
+ priv->addr.y = 0;
+ charlcd_gotoxy(lcd);
+}
+
+static void charlcd_print(struct charlcd *lcd, char c)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ if (priv->addr.x < lcd->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)
+ charlcd_gotoxy(lcd);
+}
+
+static void charlcd_clear_fast(struct charlcd *lcd)
+{
+ int pos;
+
+ charlcd_home(lcd);
+
+ if (lcd->ops->clear_fast)
+ lcd->ops->clear_fast(lcd);
+ else
+ for (pos = 0; pos < min(2, lcd->height) * lcd->hwidth; pos++)
+ lcd->ops->write_data(lcd, ' ');
+
+ charlcd_home(lcd);
+}
+
+/* clears the display and resets X/Y */
+static void charlcd_clear_display(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ lcd->ops->write_cmd(lcd, LCD_CMD_DISPLAY_CLEAR);
+ priv->addr.x = 0;
+ priv->addr.y = 0;
+ /* we must wait a few milliseconds (15) */
+ long_sleep(15);
+}
+
+static int charlcd_init_display(struct charlcd *lcd)
+{
+ void (*write_cmd_raw)(struct charlcd *lcd, int cmd);
+ struct charlcd_priv *priv = to_priv(lcd);
+ u8 init;
+
+ if (lcd->ifwidth != 4 && lcd->ifwidth != 8)
+ return -EINVAL;
+
+ priv->flags = ((lcd->height > 1) ? LCD_FLAG_N : 0) | LCD_FLAG_D |
+ LCD_FLAG_C | LCD_FLAG_B;
+
+ long_sleep(20); /* wait 20 ms after power-up for the paranoid */
+
+ /*
+ * 8-bit mode, 1 line, small fonts; let's do it 3 times, to make sure
+ * the LCD is in 8-bit mode afterwards
+ */
+ init = LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS;
+ if (lcd->ifwidth == 4) {
+ init >>= 4;
+ write_cmd_raw = lcd->ops->write_cmd_raw4;
+ } else {
+ write_cmd_raw = lcd->ops->write_cmd;
+ }
+ write_cmd_raw(lcd, init);
+ long_sleep(10);
+ write_cmd_raw(lcd, init);
+ long_sleep(10);
+ write_cmd_raw(lcd, init);
+ long_sleep(10);
+
+ if (lcd->ifwidth == 4) {
+ /* Switch to 4-bit mode, 1 line, small fonts */
+ lcd->ops->write_cmd_raw4(lcd, LCD_CMD_FUNCTION_SET >> 4);
+ long_sleep(10);
+ }
+
+ /* set font height and lines number */
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_FUNCTION_SET |
+ ((lcd->ifwidth == 8) ? LCD_CMD_DATA_LEN_8BITS : 0) |
+ ((priv->flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0) |
+ ((priv->flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0));
+ long_sleep(10);
+
+ /* display off, cursor off, blink off */
+ lcd->ops->write_cmd(lcd, LCD_CMD_DISPLAY_CTRL);
+ long_sleep(10);
+
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_DISPLAY_CTRL | /* set display mode */
+ ((priv->flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0) |
+ ((priv->flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0) |
+ ((priv->flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0));
+
+ charlcd_backlight(lcd, (priv->flags & LCD_FLAG_L) ? 1 : 0);
+
+ long_sleep(10);
+
+ /* entry mode set : increment, cursor shifting */
+ lcd->ops->write_cmd(lcd, LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC);
+
+ charlcd_clear_display(lcd);
+ return 0;
+}
+
+/*
+ * 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.
+ *
+ */
+
+static inline int handle_lcd_special_code(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ /* LCD special codes */
+
+ int processed = 0;
+
+ char *esc = priv->esc_seq.buf + 2;
+ int oldflags = priv->flags;
+
+ /* check for display mode flags */
+ switch (*esc) {
+ case 'D': /* Display ON */
+ priv->flags |= LCD_FLAG_D;
+ processed = 1;
+ break;
+ case 'd': /* Display OFF */
+ priv->flags &= ~LCD_FLAG_D;
+ processed = 1;
+ break;
+ case 'C': /* Cursor ON */
+ priv->flags |= LCD_FLAG_C;
+ processed = 1;
+ break;
+ case 'c': /* Cursor OFF */
+ priv->flags &= ~LCD_FLAG_C;
+ processed = 1;
+ break;
+ case 'B': /* Blink ON */
+ priv->flags |= LCD_FLAG_B;
+ processed = 1;
+ break;
+ case 'b': /* Blink OFF */
+ priv->flags &= ~LCD_FLAG_B;
+ processed = 1;
+ break;
+ case '+': /* Back light ON */
+ priv->flags |= LCD_FLAG_L;
+ processed = 1;
+ break;
+ case '-': /* Back light OFF */
+ priv->flags &= ~LCD_FLAG_L;
+ processed = 1;
+ break;
+ case '*': /* Flash back light */
+ charlcd_poke(lcd);
+ processed = 1;
+ break;
+ case 'f': /* Small Font */
+ priv->flags &= ~LCD_FLAG_F;
+ processed = 1;
+ break;
+ case 'F': /* Large Font */
+ priv->flags |= LCD_FLAG_F;
+ processed = 1;
+ break;
+ case 'n': /* One Line */
+ priv->flags &= ~LCD_FLAG_N;
+ processed = 1;
+ break;
+ case 'N': /* Two Lines */
+ priv->flags |= LCD_FLAG_N;
+ break;
+ 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)
+ lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
+ priv->addr.x--;
+ }
+ processed = 1;
+ break;
+ 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))
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_SHIFT | LCD_CMD_SHIFT_RIGHT);
+ priv->addr.x++;
+ }
+ processed = 1;
+ break;
+ case 'L': /* shift display left */
+ lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT);
+ processed = 1;
+ break;
+ case 'R': /* shift display right */
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT |
+ LCD_CMD_SHIFT_RIGHT);
+ processed = 1;
+ break;
+ case 'k': { /* kill end of line */
+ int x;
+
+ for (x = priv->addr.x; x < lcd->bwidth; x++)
+ lcd->ops->write_data(lcd, ' ');
+
+ /* restore cursor position */
+ charlcd_gotoxy(lcd);
+ processed = 1;
+ break;
+ }
+ case 'I': /* reinitialize display */
+ charlcd_init_display(lcd);
+ 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) {
+ processed = 1;
+ break;
+ }
+
+ cgoffset = 0;
+ shift = 0;
+ value = 0;
+ while (*esc && cgoffset < 8) {
+ shift ^= 4;
+ if (*esc >= '0' && *esc <= '9') {
+ value |= (*esc - '0') << shift;
+ } else if (*esc >= 'A' && *esc <= 'Z') {
+ value |= (*esc - 'A' + 10) << shift;
+ } else if (*esc >= 'a' && *esc <= 'z') {
+ value |= (*esc - 'a' + 10) << shift;
+ } else {
+ esc++;
+ continue;
+ }
+
+ if (shift == 0) {
+ cgbytes[cgoffset++] = value;
+ value = 0;
+ }
+
+ esc++;
+ }
+
+ lcd->ops->write_cmd(lcd, LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8));
+ for (addr = 0; addr < cgoffset; addr++)
+ lcd->ops->write_data(lcd, cgbytes[addr]);
+
+ /* ensures that we stop writing to CGRAM */
+ charlcd_gotoxy(lcd);
+ processed = 1;
+ break;
+ }
+ 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;
+ }
+ }
+
+ charlcd_gotoxy(lcd);
+ processed = 1;
+ break;
+ }
+
+ /* TODO: This indent party here got ugly, clean it! */
+ /* Check whether one flag was changed */
+ if (oldflags == priv->flags)
+ return processed;
+
+ /* check whether one of B,C,D flags were changed */
+ if ((oldflags ^ priv->flags) &
+ (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D))
+ /* set display mode */
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_DISPLAY_CTRL |
+ ((priv->flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0) |
+ ((priv->flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0) |
+ ((priv->flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0));
+ /* check whether one of F,N flags was changed */
+ else if ((oldflags ^ priv->flags) & (LCD_FLAG_F | LCD_FLAG_N))
+ lcd->ops->write_cmd(lcd,
+ LCD_CMD_FUNCTION_SET |
+ ((lcd->ifwidth == 8) ? LCD_CMD_DATA_LEN_8BITS : 0) |
+ ((priv->flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0) |
+ ((priv->flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0));
+ /* check whether L flag was changed */
+ else if ((oldflags ^ priv->flags) & LCD_FLAG_L)
+ charlcd_backlight(lcd, !!(priv->flags & LCD_FLAG_L));
+
+ return processed;
+}
+
+static void charlcd_write_char(struct charlcd *lcd, char c)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ /* first, we'll test if we're in escape mode */
+ 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;
+ } else {
+ /* aborts any previous escape sequence */
+ priv->esc_seq.len = -1;
+
+ switch (c) {
+ case LCD_ESCAPE_CHAR:
+ /* start of an escape sequence */
+ priv->esc_seq.len = 0;
+ priv->esc_seq.buf[priv->esc_seq.len] = 0;
+ break;
+ case '\b':
+ /* go back one char and clear it */
+ if (priv->addr.x > 0) {
+ /*
+ * check if we're not at the
+ * end of the line
+ */
+ if (priv->addr.x < lcd->bwidth)
+ /* back one char */
+ lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
+ priv->addr.x--;
+ }
+ /* replace with a space */
+ lcd->ops->write_data(lcd, ' ');
+ /* back one char again */
+ lcd->ops->write_cmd(lcd, LCD_CMD_SHIFT);
+ break;
+ case '\014':
+ /* quickly clear the display */
+ charlcd_clear_fast(lcd);
+ break;
+ case '\n':
+ /*
+ * 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++)
+ lcd->ops->write_data(lcd, ' ');
+ priv->addr.x = 0;
+ priv->addr.y = (priv->addr.y + 1) % lcd->height;
+ charlcd_gotoxy(lcd);
+ break;
+ case '\r':
+ /* go to the beginning of the same line */
+ priv->addr.x = 0;
+ charlcd_gotoxy(lcd);
+ break;
+ case '\t':
+ /* print a space instead of the tab */
+ charlcd_print(lcd, ' ');
+ break;
+ default:
+ /* simply print this char */
+ charlcd_print(lcd, c);
+ break;
+ }
+ }
+
+ /*
+ * now we'll see if we're in an escape mode and if the current
+ * escape sequence can be understood.
+ */
+ if (priv->esc_seq.len >= 2) {
+ int processed = 0;
+
+ if (!strcmp(priv->esc_seq.buf, "[2J")) {
+ /* clear the display */
+ charlcd_clear_fast(lcd);
+ processed = 1;
+ } else if (!strcmp(priv->esc_seq.buf, "[H")) {
+ /* cursor to home */
+ charlcd_home(lcd);
+ processed = 1;
+ }
+ /* codes starting with ^[[L */
+ else if ((priv->esc_seq.len >= 3) &&
+ (priv->esc_seq.buf[0] == '[') &&
+ (priv->esc_seq.buf[1] == 'L')) {
+ processed = handle_lcd_special_code(lcd);
+ }
+
+ /* LCD special escape codes */
+ /*
+ * flush the escape sequence if it's been processed
+ * or if it is getting too long.
+ */
+ if (processed || (priv->esc_seq.len >= LCD_ESCAPE_LEN))
+ priv->esc_seq.len = -1;
+ } /* escape codes */
+}
+
+static struct charlcd *the_charlcd;
+
+static ssize_t charlcd_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ const char __user *tmp = buf;
+ char c;
+
+ for (; count-- > 0; (*ppos)++, tmp++) {
+ if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
+ /*
+ * let's be a little nice with other processes
+ * that need some CPU
+ */
+ schedule();
+
+ if (get_user(c, tmp))
+ return -EFAULT;
+
+ charlcd_write_char(the_charlcd, c);
+ }
+
+ return tmp - buf;
+}
+
+static int charlcd_open(struct inode *inode, struct file *file)
+{
+ struct charlcd_priv *priv = to_priv(the_charlcd);
+ int ret;
+
+ ret = -EBUSY;
+ if (!atomic_dec_and_test(&charlcd_available))
+ goto fail; /* open only once at a time */
+
+ ret = -EPERM;
+ if (file->f_mode & FMODE_READ) /* device is write-only */
+ goto fail;
+
+ if (priv->must_clear) {
+ charlcd_clear_display(&priv->lcd);
+ priv->must_clear = false;
+ }
+ return nonseekable_open(inode, file);
+
+ fail:
+ atomic_inc(&charlcd_available);
+ return ret;
+}
+
+static int charlcd_release(struct inode *inode, struct file *file)
+{
+ atomic_inc(&charlcd_available);
+ return 0;
+}
+
+static const struct file_operations charlcd_fops = {
+ .write = charlcd_write,
+ .open = charlcd_open,
+ .release = charlcd_release,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice charlcd_dev = {
+ .minor = LCD_MINOR,
+ .name = "lcd",
+ .fops = &charlcd_fops,
+};
+
+static void charlcd_puts(struct charlcd *lcd, const char *s)
+{
+ const char *tmp = s;
+ int count = strlen(s);
+
+ for (; count-- > 0; tmp++) {
+ if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
+ /*
+ * let's be a little nice with other processes
+ * that need some CPU
+ */
+ schedule();
+
+ charlcd_write_char(lcd, *tmp);
+ }
+}
+
+/* initialize the LCD driver */
+static int charlcd_init(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+ int ret;
+
+ if (lcd->ops->backlight) {
+ mutex_init(&priv->bl_tempo_lock);
+ INIT_DELAYED_WORK(&priv->bl_work, charlcd_bl_off);
+ }
+
+ /*
+ * before this line, we must NOT send anything to the display.
+ * Since charlcd_init_display() needs to write data, we have to
+ * enable mark the LCD initialized just before.
+ */
+ ret = charlcd_init_display(lcd);
+ if (ret)
+ return ret;
+
+ /* display a short message */
+#ifdef CONFIG_PANEL_CHANGE_MESSAGE
+#ifdef CONFIG_PANEL_BOOT_MESSAGE
+ charlcd_puts(lcd, "\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);
+#endif
+#else
+ charlcd_puts(lcd, "\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\n");
+#endif
+ /* clear the display on the next device opening */
+ priv->must_clear = true;
+ charlcd_home(lcd);
+ return 0;
+}
+
+struct charlcd *charlcd_alloc(unsigned int drvdata_size)
+{
+ struct charlcd_priv *priv;
+ struct charlcd *lcd;
+
+ priv = kzalloc(sizeof(*priv) + drvdata_size, GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ priv->esc_seq.len = -1;
+
+ lcd = &priv->lcd;
+ lcd->ifwidth = 8;
+ lcd->bwidth = DEFAULT_LCD_BWIDTH;
+ lcd->hwidth = DEFAULT_LCD_HWIDTH;
+ lcd->drvdata = priv->drvdata;
+
+ return lcd;
+}
+EXPORT_SYMBOL_GPL(charlcd_alloc);
+
+static int panel_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ struct charlcd *lcd = the_charlcd;
+
+ switch (code) {
+ case SYS_DOWN:
+ charlcd_puts(lcd,
+ "\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
+ break;
+ case SYS_HALT:
+ charlcd_puts(lcd, "\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
+ break;
+ case SYS_POWER_OFF:
+ charlcd_puts(lcd, "\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+");
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block panel_notifier = {
+ panel_notify_sys,
+ NULL,
+ 0
+};
+
+int charlcd_register(struct charlcd *lcd)
+{
+ int ret;
+
+ ret = charlcd_init(lcd);
+ if (ret)
+ return ret;
+
+ ret = misc_register(&charlcd_dev);
+ if (ret)
+ return ret;
+
+ the_charlcd = lcd;
+ register_reboot_notifier(&panel_notifier);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(charlcd_register);
+
+int charlcd_unregister(struct charlcd *lcd)
+{
+ struct charlcd_priv *priv = to_priv(lcd);
+
+ unregister_reboot_notifier(&panel_notifier);
+ charlcd_puts(lcd, "\x0cLCD driver unloaded.\x1b[Lc\x1b[Lb\x1b[L-");
+ misc_deregister(&charlcd_dev);
+ the_charlcd = NULL;
+ if (lcd->ops->backlight) {
+ cancel_delayed_work_sync(&priv->bl_work);
+ priv->lcd.ops->backlight(&priv->lcd, 0);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(charlcd_unregister);
+
+MODULE_LICENSE("GPL");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/hd44780.c b/src/kernel/linux/v4.14/drivers/auxdisplay/hd44780.c
new file mode 100644
index 0000000..2d927fe
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/hd44780.c
@@ -0,0 +1,328 @@
+/*
+ * 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>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+
+#include <misc/charlcd.h>
+
+
+enum hd44780_pin {
+ /* Order does matter due to writing to GPIO array subsets! */
+ PIN_DATA0, /* Optional */
+ PIN_DATA1, /* Optional */
+ PIN_DATA2, /* Optional */
+ PIN_DATA3, /* Optional */
+ PIN_DATA4,
+ PIN_DATA5,
+ PIN_DATA6,
+ PIN_DATA7,
+ PIN_CTRL_RS,
+ PIN_CTRL_RW, /* Optional */
+ PIN_CTRL_E,
+ PIN_CTRL_BL, /* Optional */
+ PIN_NUM
+};
+
+struct hd44780 {
+ struct gpio_desc *pins[PIN_NUM];
+};
+
+static void hd44780_backlight(struct charlcd *lcd, int on)
+{
+ struct hd44780 *hd = lcd->drvdata;
+
+ if (hd->pins[PIN_CTRL_BL])
+ gpiod_set_value_cansleep(hd->pins[PIN_CTRL_BL], on);
+}
+
+static void hd44780_strobe_gpio(struct hd44780 *hd)
+{
+ /* Maintain the data during 20 us before the strobe */
+ udelay(20);
+
+ gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 1);
+
+ /* Maintain the strobe during 40 us */
+ udelay(40);
+
+ gpiod_set_value_cansleep(hd->pins[PIN_CTRL_E], 0);
+}
+
+/* write to an LCD panel register in 8 bit GPIO mode */
+static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)
+{
+ int values[10]; /* for DATA[0-7], RS, RW */
+ unsigned int i, n;
+
+ for (i = 0; i < 8; i++)
+ values[PIN_DATA0 + i] = !!(val & BIT(i));
+ values[PIN_CTRL_RS] = rs;
+ n = 9;
+ if (hd->pins[PIN_CTRL_RW]) {
+ values[PIN_CTRL_RW] = 0;
+ n++;
+ }
+
+ /* Present the data to the port */
+ gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], values);
+
+ hd44780_strobe_gpio(hd);
+}
+
+/* write to an LCD panel register in 4 bit GPIO mode */
+static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)
+{
+ int values[10]; /* for DATA[0-7], RS, RW, but DATA[0-3] is unused */
+ unsigned int i, n;
+
+ /* High nibble + RS, RW */
+ for (i = 4; i < 8; i++)
+ values[PIN_DATA0 + i] = !!(val & BIT(i));
+ values[PIN_CTRL_RS] = rs;
+ n = 5;
+ if (hd->pins[PIN_CTRL_RW]) {
+ values[PIN_CTRL_RW] = 0;
+ n++;
+ }
+
+ /* Present the data to the port */
+ gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
+ &values[PIN_DATA4]);
+
+ hd44780_strobe_gpio(hd);
+
+ /* Low nibble */
+ for (i = 0; i < 4; i++)
+ values[PIN_DATA4 + i] = !!(val & BIT(i));
+
+ /* Present the data to the port */
+ gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
+ &values[PIN_DATA4]);
+
+ hd44780_strobe_gpio(hd);
+}
+
+/* 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;
+
+ hd44780_write_gpio8(hd, cmd, 0);
+
+ /* The shortest command takes at least 120 us */
+ udelay(120);
+}
+
+/* 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;
+
+ hd44780_write_gpio8(hd, data, 1);
+
+ /* The shortest data takes at least 45 us */
+ udelay(45);
+}
+
+static const struct charlcd_ops hd44780_ops_gpio8 = {
+ .write_cmd = hd44780_write_cmd_gpio8,
+ .write_data = hd44780_write_data_gpio8,
+ .backlight = hd44780_backlight,
+};
+
+/* 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;
+
+ hd44780_write_gpio4(hd, cmd, 0);
+
+ /* The shortest command takes at least 120 us */
+ udelay(120);
+}
+
+/* Send 4-bits of a command to the LCD panel in raw 4 bit GPIO mode */
+static void hd44780_write_cmd_raw_gpio4(struct charlcd *lcd, int cmd)
+{
+ int values[10]; /* for DATA[0-7], RS, RW, but DATA[0-3] is unused */
+ struct hd44780 *hd = lcd->drvdata;
+ unsigned int i, n;
+
+ /* Command nibble + RS, RW */
+ for (i = 0; i < 4; i++)
+ values[PIN_DATA4 + i] = !!(cmd & BIT(i));
+ values[PIN_CTRL_RS] = 0;
+ n = 5;
+ if (hd->pins[PIN_CTRL_RW]) {
+ values[PIN_CTRL_RW] = 0;
+ n++;
+ }
+
+ /* Present the data to the port */
+ gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
+ &values[PIN_DATA4]);
+
+ hd44780_strobe_gpio(hd);
+}
+
+/* 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;
+
+ hd44780_write_gpio4(hd, data, 1);
+
+ /* The shortest data takes at least 45 us */
+ udelay(45);
+}
+
+static const struct charlcd_ops hd44780_ops_gpio4 = {
+ .write_cmd = hd44780_write_cmd_gpio4,
+ .write_cmd_raw4 = hd44780_write_cmd_raw_gpio4,
+ .write_data = hd44780_write_data_gpio4,
+ .backlight = hd44780_backlight,
+};
+
+static int hd44780_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ unsigned int i, base;
+ struct charlcd *lcd;
+ struct hd44780 *hd;
+ int ifwidth, ret;
+
+ /* Required pins */
+ ifwidth = gpiod_count(dev, "data");
+ if (ifwidth < 0)
+ return ifwidth;
+
+ switch (ifwidth) {
+ case 4:
+ base = PIN_DATA4;
+ break;
+ case 8:
+ base = PIN_DATA0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ lcd = charlcd_alloc(sizeof(struct hd44780));
+ if (!lcd)
+ return -ENOMEM;
+
+ hd = lcd->drvdata;
+
+ for (i = 0; i < ifwidth; i++) {
+ hd->pins[base + i] = devm_gpiod_get_index(dev, "data", i,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(hd->pins[base + i])) {
+ ret = PTR_ERR(hd->pins[base + i]);
+ goto fail;
+ }
+ }
+
+ hd->pins[PIN_CTRL_E] = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(hd->pins[PIN_CTRL_E])) {
+ ret = PTR_ERR(hd->pins[PIN_CTRL_E]);
+ goto fail;
+ }
+
+ hd->pins[PIN_CTRL_RS] = devm_gpiod_get(dev, "rs", GPIOD_OUT_HIGH);
+ if (IS_ERR(hd->pins[PIN_CTRL_RS])) {
+ ret = PTR_ERR(hd->pins[PIN_CTRL_RS]);
+ goto fail;
+ }
+
+ /* Optional pins */
+ hd->pins[PIN_CTRL_RW] = devm_gpiod_get_optional(dev, "rw",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(hd->pins[PIN_CTRL_RW])) {
+ ret = PTR_ERR(hd->pins[PIN_CTRL_RW]);
+ goto fail;
+ }
+
+ hd->pins[PIN_CTRL_BL] = devm_gpiod_get_optional(dev, "backlight",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(hd->pins[PIN_CTRL_BL])) {
+ ret = PTR_ERR(hd->pins[PIN_CTRL_BL]);
+ goto fail;
+ }
+
+ /* Required properties */
+ ret = device_property_read_u32(dev, "display-height-chars",
+ &lcd->height);
+ if (ret)
+ goto fail;
+ ret = device_property_read_u32(dev, "display-width-chars", &lcd->width);
+ if (ret)
+ goto fail;
+
+ /*
+ * On displays with more than two rows, the internal buffer width is
+ * usually equal to the display width
+ */
+ if (lcd->height > 2)
+ lcd->bwidth = lcd->width;
+
+ /* Optional properties */
+ device_property_read_u32(dev, "internal-buffer-width", &lcd->bwidth);
+
+ lcd->ifwidth = ifwidth;
+ lcd->ops = ifwidth == 8 ? &hd44780_ops_gpio8 : &hd44780_ops_gpio4;
+
+ ret = charlcd_register(lcd);
+ if (ret)
+ goto fail;
+
+ platform_set_drvdata(pdev, lcd);
+ return 0;
+
+fail:
+ kfree(lcd);
+ return ret;
+}
+
+static int hd44780_remove(struct platform_device *pdev)
+{
+ struct charlcd *lcd = platform_get_drvdata(pdev);
+
+ charlcd_unregister(lcd);
+
+ kfree(lcd);
+ return 0;
+}
+
+static const struct of_device_id hd44780_of_match[] = {
+ { .compatible = "hit,hd44780" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hd44780_of_match);
+
+static struct platform_driver hd44780_driver = {
+ .probe = hd44780_probe,
+ .remove = hd44780_remove,
+ .driver = {
+ .name = "hd44780",
+ .of_match_table = hd44780_of_match,
+ },
+};
+
+module_platform_driver(hd44780_driver);
+MODULE_DESCRIPTION("HD44780 Character LCD driver");
+MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
+MODULE_LICENSE("GPL");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/ht16k33.c b/src/kernel/linux/v4.14/drivers/auxdisplay/ht16k33.c
new file mode 100644
index 0000000..a93ded3
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/ht16k33.c
@@ -0,0 +1,553 @@
+/*
+ * 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>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/fb.h>
+#include <linux/slab.h>
+#include <linux/backlight.h>
+#include <linux/input.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/workqueue.h>
+#include <linux/mm.h>
+
+/* Registers */
+#define REG_SYSTEM_SETUP 0x20
+#define REG_SYSTEM_SETUP_OSC_ON BIT(0)
+
+#define REG_DISPLAY_SETUP 0x80
+#define REG_DISPLAY_SETUP_ON BIT(0)
+
+#define REG_ROWINT_SET 0xA0
+#define REG_ROWINT_SET_INT_EN BIT(0)
+#define REG_ROWINT_SET_INT_ACT_HIGH BIT(1)
+
+#define REG_BRIGHTNESS 0xE0
+
+/* Defines */
+#define DRIVER_NAME "ht16k33"
+
+#define MIN_BRIGHTNESS 0x1
+#define MAX_BRIGHTNESS 0x10
+
+#define HT16K33_MATRIX_LED_MAX_COLS 8
+#define HT16K33_MATRIX_LED_MAX_ROWS 16
+#define HT16K33_MATRIX_KEYPAD_MAX_COLS 3
+#define HT16K33_MATRIX_KEYPAD_MAX_ROWS 12
+
+#define BYTES_PER_ROW (HT16K33_MATRIX_LED_MAX_ROWS / 8)
+#define HT16K33_FB_SIZE (HT16K33_MATRIX_LED_MAX_COLS * BYTES_PER_ROW)
+
+struct ht16k33_keypad {
+ struct i2c_client *client;
+ struct input_dev *dev;
+ uint32_t cols;
+ uint32_t rows;
+ uint32_t row_shift;
+ uint32_t debounce_ms;
+ uint16_t last_key_state[HT16K33_MATRIX_KEYPAD_MAX_COLS];
+
+ wait_queue_head_t wait;
+ bool stopped;
+};
+
+struct ht16k33_fbdev {
+ struct fb_info *info;
+ uint32_t refresh_rate;
+ uint8_t *buffer;
+ uint8_t *cache;
+ struct delayed_work work;
+};
+
+struct ht16k33_priv {
+ struct i2c_client *client;
+ struct ht16k33_keypad keypad;
+ struct ht16k33_fbdev fbdev;
+};
+
+static struct fb_fix_screeninfo ht16k33_fb_fix = {
+ .id = DRIVER_NAME,
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_MONO10,
+ .xpanstep = 0,
+ .ypanstep = 0,
+ .ywrapstep = 0,
+ .line_length = HT16K33_MATRIX_LED_MAX_ROWS,
+ .accel = FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo ht16k33_fb_var = {
+ .xres = HT16K33_MATRIX_LED_MAX_ROWS,
+ .yres = HT16K33_MATRIX_LED_MAX_COLS,
+ .xres_virtual = HT16K33_MATRIX_LED_MAX_ROWS,
+ .yres_virtual = HT16K33_MATRIX_LED_MAX_COLS,
+ .bits_per_pixel = 1,
+ .red = { 0, 1, 0 },
+ .green = { 0, 1, 0 },
+ .blue = { 0, 1, 0 },
+ .left_margin = 0,
+ .right_margin = 0,
+ .upper_margin = 0,
+ .lower_margin = 0,
+ .vmode = FB_VMODE_NONINTERLACED,
+};
+
+static int ht16k33_display_on(struct ht16k33_priv *priv)
+{
+ uint8_t data = REG_DISPLAY_SETUP | REG_DISPLAY_SETUP_ON;
+
+ return i2c_smbus_write_byte(priv->client, data);
+}
+
+static int ht16k33_display_off(struct ht16k33_priv *priv)
+{
+ return i2c_smbus_write_byte(priv->client, REG_DISPLAY_SETUP);
+}
+
+static void ht16k33_fb_queue(struct ht16k33_priv *priv)
+{
+ struct ht16k33_fbdev *fbdev = &priv->fbdev;
+
+ schedule_delayed_work(&fbdev->work,
+ msecs_to_jiffies(HZ / fbdev->refresh_rate));
+}
+
+/*
+ * This gets the fb data from cache and copies it to ht16k33 display RAM
+ */
+static void ht16k33_fb_update(struct work_struct *work)
+{
+ struct ht16k33_fbdev *fbdev =
+ container_of(work, struct ht16k33_fbdev, work.work);
+ struct ht16k33_priv *priv =
+ container_of(fbdev, struct ht16k33_priv, fbdev);
+
+ uint8_t *p1, *p2;
+ int len, pos = 0, first = -1;
+
+ p1 = fbdev->cache;
+ p2 = fbdev->buffer;
+
+ /* Search for the first byte with changes */
+ while (pos < HT16K33_FB_SIZE && first < 0) {
+ if (*(p1++) - *(p2++))
+ first = pos;
+ pos++;
+ }
+
+ /* No changes found */
+ if (first < 0)
+ goto requeue;
+
+ len = HT16K33_FB_SIZE - first;
+ p1 = fbdev->cache + HT16K33_FB_SIZE - 1;
+ p2 = fbdev->buffer + HT16K33_FB_SIZE - 1;
+
+ /* Determine i2c transfer length */
+ while (len > 1) {
+ if (*(p1--) - *(p2--))
+ break;
+ len--;
+ }
+
+ p1 = fbdev->cache + first;
+ p2 = fbdev->buffer + first;
+ if (!i2c_smbus_write_i2c_block_data(priv->client, first, len, p2))
+ memcpy(p1, p2, len);
+requeue:
+ ht16k33_fb_queue(priv);
+}
+
+static int ht16k33_initialize(struct ht16k33_priv *priv)
+{
+ uint8_t byte;
+ int err;
+ uint8_t data[HT16K33_MATRIX_LED_MAX_COLS * 2];
+
+ /* Clear RAM (8 * 16 bits) */
+ memset(data, 0, sizeof(data));
+ err = i2c_smbus_write_block_data(priv->client, 0, sizeof(data), data);
+ if (err)
+ return err;
+
+ /* Turn on internal oscillator */
+ byte = REG_SYSTEM_SETUP_OSC_ON | REG_SYSTEM_SETUP;
+ err = i2c_smbus_write_byte(priv->client, byte);
+ if (err)
+ return err;
+
+ /* Configure INT pin */
+ byte = REG_ROWINT_SET | REG_ROWINT_SET_INT_ACT_HIGH;
+ if (priv->client->irq > 0)
+ byte |= REG_ROWINT_SET_INT_EN;
+ return i2c_smbus_write_byte(priv->client, byte);
+}
+
+static int ht16k33_bl_update_status(struct backlight_device *bl)
+{
+ int brightness = bl->props.brightness;
+ struct ht16k33_priv *priv = bl_get_data(bl);
+
+ if (bl->props.power != FB_BLANK_UNBLANK ||
+ bl->props.fb_blank != FB_BLANK_UNBLANK ||
+ bl->props.state & BL_CORE_FBBLANK || brightness == 0) {
+ return ht16k33_display_off(priv);
+ }
+
+ ht16k33_display_on(priv);
+ return i2c_smbus_write_byte(priv->client,
+ REG_BRIGHTNESS | (brightness - 1));
+}
+
+static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)
+{
+ struct ht16k33_priv *priv = bl_get_data(bl);
+
+ return (fi == NULL) || (fi->par == priv);
+}
+
+static const struct backlight_ops ht16k33_bl_ops = {
+ .update_status = ht16k33_bl_update_status,
+ .check_fb = ht16k33_bl_check_fb,
+};
+
+static int ht16k33_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ struct ht16k33_priv *priv = info->par;
+
+ return vm_insert_page(vma, vma->vm_start,
+ virt_to_page(priv->fbdev.buffer));
+}
+
+static struct fb_ops ht16k33_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_read = fb_sys_read,
+ .fb_write = fb_sys_write,
+ .fb_fillrect = sys_fillrect,
+ .fb_copyarea = sys_copyarea,
+ .fb_imageblit = sys_imageblit,
+ .fb_mmap = ht16k33_mmap,
+};
+
+/*
+ * This gets the keys from keypad and reports it to input subsystem.
+ * Returns true if a key is pressed.
+ */
+static bool ht16k33_keypad_scan(struct ht16k33_keypad *keypad)
+{
+ const unsigned short *keycodes = keypad->dev->keycode;
+ u16 new_state[HT16K33_MATRIX_KEYPAD_MAX_COLS];
+ __le16 data[HT16K33_MATRIX_KEYPAD_MAX_COLS];
+ unsigned long bits_changed;
+ int row, col, code;
+ int rc;
+ bool pressed = false;
+
+ rc = i2c_smbus_read_i2c_block_data(keypad->client, 0x40,
+ sizeof(data), (u8 *)data);
+ if (rc != sizeof(data)) {
+ dev_err(&keypad->client->dev,
+ "Failed to read key data, rc=%d\n", rc);
+ return false;
+ }
+
+ for (col = 0; col < keypad->cols; col++) {
+ new_state[col] = le16_to_cpu(data[col]);
+ if (new_state[col])
+ pressed = true;
+ bits_changed = keypad->last_key_state[col] ^ new_state[col];
+
+ for_each_set_bit(row, &bits_changed, BITS_PER_LONG) {
+ code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
+ input_event(keypad->dev, EV_MSC, MSC_SCAN, code);
+ input_report_key(keypad->dev, keycodes[code],
+ new_state[col] & BIT(row));
+ }
+ }
+ input_sync(keypad->dev);
+ memcpy(keypad->last_key_state, new_state, sizeof(u16) * keypad->cols);
+
+ return pressed;
+}
+
+static irqreturn_t ht16k33_keypad_irq_thread(int irq, void *dev)
+{
+ struct ht16k33_keypad *keypad = dev;
+
+ do {
+ wait_event_timeout(keypad->wait, keypad->stopped,
+ msecs_to_jiffies(keypad->debounce_ms));
+ if (keypad->stopped)
+ break;
+ } while (ht16k33_keypad_scan(keypad));
+
+ return IRQ_HANDLED;
+}
+
+static int ht16k33_keypad_start(struct input_dev *dev)
+{
+ struct ht16k33_keypad *keypad = input_get_drvdata(dev);
+
+ keypad->stopped = false;
+ mb();
+ enable_irq(keypad->client->irq);
+
+ return 0;
+}
+
+static void ht16k33_keypad_stop(struct input_dev *dev)
+{
+ struct ht16k33_keypad *keypad = input_get_drvdata(dev);
+
+ keypad->stopped = true;
+ mb();
+ wake_up(&keypad->wait);
+ disable_irq(keypad->client->irq);
+}
+
+static int ht16k33_keypad_probe(struct i2c_client *client,
+ struct ht16k33_keypad *keypad)
+{
+ struct device_node *node = client->dev.of_node;
+ u32 rows = HT16K33_MATRIX_KEYPAD_MAX_ROWS;
+ u32 cols = HT16K33_MATRIX_KEYPAD_MAX_COLS;
+ int err;
+
+ keypad->client = client;
+ init_waitqueue_head(&keypad->wait);
+
+ keypad->dev = devm_input_allocate_device(&client->dev);
+ if (!keypad->dev)
+ return -ENOMEM;
+
+ input_set_drvdata(keypad->dev, keypad);
+
+ keypad->dev->name = DRIVER_NAME"-keypad";
+ keypad->dev->id.bustype = BUS_I2C;
+ keypad->dev->open = ht16k33_keypad_start;
+ keypad->dev->close = ht16k33_keypad_stop;
+
+ if (!of_get_property(node, "linux,no-autorepeat", NULL))
+ __set_bit(EV_REP, keypad->dev->evbit);
+
+ err = of_property_read_u32(node, "debounce-delay-ms",
+ &keypad->debounce_ms);
+ if (err) {
+ dev_err(&client->dev, "key debounce delay not specified\n");
+ return err;
+ }
+
+ err = matrix_keypad_parse_of_params(&client->dev, &rows, &cols);
+ if (err)
+ return err;
+ if (rows > HT16K33_MATRIX_KEYPAD_MAX_ROWS ||
+ cols > HT16K33_MATRIX_KEYPAD_MAX_COLS) {
+ dev_err(&client->dev, "%u rows or %u cols out of range in DT\n",
+ rows, cols);
+ return -ERANGE;
+ }
+
+ keypad->rows = rows;
+ keypad->cols = cols;
+ keypad->row_shift = get_count_order(cols);
+
+ err = matrix_keypad_build_keymap(NULL, NULL, rows, cols, NULL,
+ keypad->dev);
+ if (err) {
+ dev_err(&client->dev, "failed to build keymap\n");
+ return err;
+ }
+
+ err = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, ht16k33_keypad_irq_thread,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ DRIVER_NAME, keypad);
+ if (err) {
+ dev_err(&client->dev, "irq request failed %d, error %d\n",
+ client->irq, err);
+ return err;
+ }
+
+ ht16k33_keypad_stop(keypad->dev);
+
+ err = input_register_device(keypad->dev);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int ht16k33_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int err;
+ uint32_t dft_brightness;
+ struct backlight_device *bl;
+ struct backlight_properties bl_props;
+ struct ht16k33_priv *priv;
+ struct ht16k33_fbdev *fbdev;
+ struct device_node *node = client->dev.of_node;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "i2c_check_functionality error\n");
+ return -EIO;
+ }
+
+ if (client->irq <= 0) {
+ dev_err(&client->dev, "No IRQ specified\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+ i2c_set_clientdata(client, priv);
+ fbdev = &priv->fbdev;
+
+ err = ht16k33_initialize(priv);
+ if (err)
+ return err;
+
+ /* Framebuffer (2 bytes per column) */
+ BUILD_BUG_ON(PAGE_SIZE < HT16K33_FB_SIZE);
+ fbdev->buffer = (unsigned char *) get_zeroed_page(GFP_KERNEL);
+ if (!fbdev->buffer)
+ return -ENOMEM;
+
+ fbdev->cache = devm_kmalloc(&client->dev, HT16K33_FB_SIZE, GFP_KERNEL);
+ if (!fbdev->cache) {
+ err = -ENOMEM;
+ goto err_fbdev_buffer;
+ }
+
+ fbdev->info = framebuffer_alloc(0, &client->dev);
+ if (!fbdev->info) {
+ err = -ENOMEM;
+ goto err_fbdev_buffer;
+ }
+
+ err = of_property_read_u32(node, "refresh-rate-hz",
+ &fbdev->refresh_rate);
+ if (err) {
+ dev_err(&client->dev, "refresh rate not specified\n");
+ goto err_fbdev_info;
+ }
+ fb_bl_default_curve(fbdev->info, 0, MIN_BRIGHTNESS, MAX_BRIGHTNESS);
+
+ INIT_DELAYED_WORK(&fbdev->work, ht16k33_fb_update);
+ fbdev->info->fbops = &ht16k33_fb_ops;
+ fbdev->info->screen_base = (char __iomem *) fbdev->buffer;
+ fbdev->info->screen_size = HT16K33_FB_SIZE;
+ fbdev->info->fix = ht16k33_fb_fix;
+ fbdev->info->var = ht16k33_fb_var;
+ fbdev->info->pseudo_palette = NULL;
+ fbdev->info->flags = FBINFO_FLAG_DEFAULT;
+ fbdev->info->par = priv;
+
+ err = register_framebuffer(fbdev->info);
+ if (err)
+ goto err_fbdev_info;
+
+ err = ht16k33_keypad_probe(client, &priv->keypad);
+ if (err)
+ goto err_fbdev_unregister;
+
+ /* Backlight */
+ memset(&bl_props, 0, sizeof(struct backlight_properties));
+ bl_props.type = BACKLIGHT_RAW;
+ bl_props.max_brightness = MAX_BRIGHTNESS;
+
+ bl = devm_backlight_device_register(&client->dev, DRIVER_NAME"-bl",
+ &client->dev, priv,
+ &ht16k33_bl_ops, &bl_props);
+ if (IS_ERR(bl)) {
+ dev_err(&client->dev, "failed to register backlight\n");
+ err = PTR_ERR(bl);
+ goto err_fbdev_unregister;
+ }
+
+ err = of_property_read_u32(node, "default-brightness-level",
+ &dft_brightness);
+ if (err) {
+ dft_brightness = MAX_BRIGHTNESS;
+ } else if (dft_brightness > MAX_BRIGHTNESS) {
+ dev_warn(&client->dev,
+ "invalid default brightness level: %u, using %u\n",
+ dft_brightness, MAX_BRIGHTNESS);
+ dft_brightness = MAX_BRIGHTNESS;
+ }
+
+ bl->props.brightness = dft_brightness;
+ ht16k33_bl_update_status(bl);
+
+ ht16k33_fb_queue(priv);
+ return 0;
+
+err_fbdev_unregister:
+ unregister_framebuffer(fbdev->info);
+err_fbdev_info:
+ framebuffer_release(fbdev->info);
+err_fbdev_buffer:
+ free_page((unsigned long) fbdev->buffer);
+
+ return err;
+}
+
+static int ht16k33_remove(struct i2c_client *client)
+{
+ struct ht16k33_priv *priv = i2c_get_clientdata(client);
+ struct ht16k33_fbdev *fbdev = &priv->fbdev;
+
+ cancel_delayed_work_sync(&fbdev->work);
+ unregister_framebuffer(fbdev->info);
+ framebuffer_release(fbdev->info);
+ free_page((unsigned long) fbdev->buffer);
+
+ return 0;
+}
+
+static const struct i2c_device_id ht16k33_i2c_match[] = {
+ { "ht16k33", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ht16k33_i2c_match);
+
+static const struct of_device_id ht16k33_of_match[] = {
+ { .compatible = "holtek,ht16k33", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ht16k33_of_match);
+
+static struct i2c_driver ht16k33_driver = {
+ .probe = ht16k33_probe,
+ .remove = ht16k33_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = of_match_ptr(ht16k33_of_match),
+ },
+ .id_table = ht16k33_i2c_match,
+};
+module_i2c_driver(ht16k33_driver);
+
+MODULE_DESCRIPTION("Holtek HT16K33 driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Robin van der Gracht <robin@protonic.nl>");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/img-ascii-lcd.c b/src/kernel/linux/v4.14/drivers/auxdisplay/img-ascii-lcd.c
new file mode 100644
index 0000000..5840305
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/img-ascii-lcd.c
@@ -0,0 +1,449 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@mips.com>
+ *
+ * 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 <generated/utsrelease.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+struct img_ascii_lcd_ctx;
+
+/**
+ * struct img_ascii_lcd_config - Configuration information about an LCD model
+ * @num_chars: the number of characters the LCD can display
+ * @external_regmap: true if registers are in a system controller, else false
+ * @update: function called to update the LCD
+ */
+struct img_ascii_lcd_config {
+ unsigned int num_chars;
+ bool external_regmap;
+ void (*update)(struct img_ascii_lcd_ctx *ctx);
+};
+
+/**
+ * struct img_ascii_lcd_ctx - Private data structure
+ * @pdev: the ASCII LCD platform device
+ * @base: the base address of the LCD registers
+ * @regmap: the regmap through which LCD registers are accessed
+ * @offset: the offset within regmap to the start of the LCD registers
+ * @cfg: pointer to the LCD model configuration
+ * @message: the full message to display or scroll on the LCD
+ * @message_len: the length of the @message string
+ * @scroll_pos: index of the first character of @message currently displayed
+ * @scroll_rate: scroll interval in jiffies
+ * @timer: timer used to implement scrolling
+ * @curr: the string currently displayed on the LCD
+ */
+struct img_ascii_lcd_ctx {
+ struct platform_device *pdev;
+ union {
+ void __iomem *base;
+ struct regmap *regmap;
+ };
+ u32 offset;
+ const struct img_ascii_lcd_config *cfg;
+ char *message;
+ unsigned int message_len;
+ unsigned int scroll_pos;
+ unsigned int scroll_rate;
+ struct timer_list timer;
+ char curr[] __aligned(8);
+};
+
+/*
+ * MIPS Boston development board
+ */
+
+static void boston_update(struct img_ascii_lcd_ctx *ctx)
+{
+ ulong val;
+
+#if BITS_PER_LONG == 64
+ val = *((u64 *)&ctx->curr[0]);
+ __raw_writeq(val, ctx->base);
+#elif BITS_PER_LONG == 32
+ val = *((u32 *)&ctx->curr[0]);
+ __raw_writel(val, ctx->base);
+ val = *((u32 *)&ctx->curr[4]);
+ __raw_writel(val, ctx->base + 4);
+#else
+# error Not 32 or 64 bit
+#endif
+}
+
+static struct img_ascii_lcd_config boston_config = {
+ .num_chars = 8,
+ .update = boston_update,
+};
+
+/*
+ * MIPS Malta development board
+ */
+
+static void malta_update(struct img_ascii_lcd_ctx *ctx)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < ctx->cfg->num_chars; i++) {
+ err = regmap_write(ctx->regmap,
+ ctx->offset + (i * 8), ctx->curr[i]);
+ if (err)
+ break;
+ }
+
+ if (unlikely(err))
+ pr_err_ratelimited("Failed to update LCD display: %d\n", err);
+}
+
+static struct img_ascii_lcd_config malta_config = {
+ .num_chars = 8,
+ .external_regmap = true,
+ .update = malta_update,
+};
+
+/*
+ * MIPS SEAD3 development board
+ */
+
+enum {
+ SEAD3_REG_LCD_CTRL = 0x00,
+#define SEAD3_REG_LCD_CTRL_SETDRAM BIT(7)
+ SEAD3_REG_LCD_DATA = 0x08,
+ SEAD3_REG_CPLD_STATUS = 0x10,
+#define SEAD3_REG_CPLD_STATUS_BUSY BIT(0)
+ SEAD3_REG_CPLD_DATA = 0x18,
+#define SEAD3_REG_CPLD_DATA_BUSY BIT(7)
+};
+
+static int sead3_wait_sm_idle(struct img_ascii_lcd_ctx *ctx)
+{
+ unsigned int status;
+ int err;
+
+ do {
+ err = regmap_read(ctx->regmap,
+ ctx->offset + SEAD3_REG_CPLD_STATUS,
+ &status);
+ if (err)
+ return err;
+ } while (status & SEAD3_REG_CPLD_STATUS_BUSY);
+
+ return 0;
+
+}
+
+static int sead3_wait_lcd_idle(struct img_ascii_lcd_ctx *ctx)
+{
+ unsigned int cpld_data;
+ int err;
+
+ err = sead3_wait_sm_idle(ctx);
+ if (err)
+ return err;
+
+ do {
+ err = regmap_read(ctx->regmap,
+ ctx->offset + SEAD3_REG_LCD_CTRL,
+ &cpld_data);
+ if (err)
+ return err;
+
+ err = sead3_wait_sm_idle(ctx);
+ if (err)
+ return err;
+
+ err = regmap_read(ctx->regmap,
+ ctx->offset + SEAD3_REG_CPLD_DATA,
+ &cpld_data);
+ if (err)
+ return err;
+ } while (cpld_data & SEAD3_REG_CPLD_DATA_BUSY);
+
+ return 0;
+}
+
+static void sead3_update(struct img_ascii_lcd_ctx *ctx)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < ctx->cfg->num_chars; i++) {
+ err = sead3_wait_lcd_idle(ctx);
+ if (err)
+ break;
+
+ err = regmap_write(ctx->regmap,
+ ctx->offset + SEAD3_REG_LCD_CTRL,
+ SEAD3_REG_LCD_CTRL_SETDRAM | i);
+ if (err)
+ break;
+
+ err = sead3_wait_lcd_idle(ctx);
+ if (err)
+ break;
+
+ err = regmap_write(ctx->regmap,
+ ctx->offset + SEAD3_REG_LCD_DATA,
+ ctx->curr[i]);
+ if (err)
+ break;
+ }
+
+ if (unlikely(err))
+ pr_err_ratelimited("Failed to update LCD display: %d\n", err);
+}
+
+static struct img_ascii_lcd_config sead3_config = {
+ .num_chars = 16,
+ .external_regmap = true,
+ .update = sead3_update,
+};
+
+static const struct of_device_id img_ascii_lcd_matches[] = {
+ { .compatible = "img,boston-lcd", .data = &boston_config },
+ { .compatible = "mti,malta-lcd", .data = &malta_config },
+ { .compatible = "mti,sead3-lcd", .data = &sead3_config },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, img_ascii_lcd_matches);
+
+/**
+ * img_ascii_lcd_scroll() - scroll the display by a character
+ * @arg: really a pointer to the private data structure
+ *
+ * Scroll the current message along the LCD by one character, rearming the
+ * timer if required.
+ */
+static void img_ascii_lcd_scroll(unsigned long arg)
+{
+ struct img_ascii_lcd_ctx *ctx = (struct img_ascii_lcd_ctx *)arg;
+ unsigned int i, ch = ctx->scroll_pos;
+ unsigned int num_chars = ctx->cfg->num_chars;
+
+ /* update the current message string */
+ for (i = 0; i < num_chars;) {
+ /* copy as many characters from the string as possible */
+ for (; i < num_chars && ch < ctx->message_len; i++, ch++)
+ ctx->curr[i] = ctx->message[ch];
+
+ /* wrap around to the start of the string */
+ ch = 0;
+ }
+
+ /* update the LCD */
+ ctx->cfg->update(ctx);
+
+ /* move on to the next character */
+ ctx->scroll_pos++;
+ ctx->scroll_pos %= ctx->message_len;
+
+ /* rearm the timer */
+ if (ctx->message_len > ctx->cfg->num_chars)
+ mod_timer(&ctx->timer, jiffies + ctx->scroll_rate);
+}
+
+/**
+ * img_ascii_lcd_display() - set the message to be displayed
+ * @ctx: pointer to the private data structure
+ * @msg: the message to display
+ * @count: length of msg, or -1
+ *
+ * Display a new message @msg on the LCD. @msg can be longer than the number of
+ * characters the LCD can display, in which case it will begin scrolling across
+ * the LCD display.
+ *
+ * Return: 0 on success, -ENOMEM on memory allocation failure
+ */
+static int img_ascii_lcd_display(struct img_ascii_lcd_ctx *ctx,
+ const char *msg, ssize_t count)
+{
+ char *new_msg;
+
+ /* stop the scroll timer */
+ del_timer_sync(&ctx->timer);
+
+ if (count == -1)
+ count = strlen(msg);
+
+ /* if the string ends with a newline, trim it */
+ if (msg[count - 1] == '\n')
+ count--;
+
+ new_msg = devm_kmalloc(&ctx->pdev->dev, count + 1, GFP_KERNEL);
+ if (!new_msg)
+ return -ENOMEM;
+
+ memcpy(new_msg, msg, count);
+ new_msg[count] = 0;
+
+ if (ctx->message)
+ devm_kfree(&ctx->pdev->dev, ctx->message);
+
+ ctx->message = new_msg;
+ ctx->message_len = count;
+ ctx->scroll_pos = 0;
+
+ /* update the LCD */
+ img_ascii_lcd_scroll((unsigned long)ctx);
+
+ return 0;
+}
+
+/**
+ * message_show() - read message via sysfs
+ * @dev: the LCD device
+ * @attr: the LCD message attribute
+ * @buf: the buffer to read the message into
+ *
+ * Read the current message being displayed or scrolled across the LCD display
+ * into @buf, for reads from sysfs.
+ *
+ * Return: the number of characters written to @buf
+ */
+static ssize_t message_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct img_ascii_lcd_ctx *ctx = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", ctx->message);
+}
+
+/**
+ * message_store() - write a new message via sysfs
+ * @dev: the LCD device
+ * @attr: the LCD message attribute
+ * @buf: the buffer containing the new message
+ * @count: the size of the message in @buf
+ *
+ * Write a new message to display or scroll across the LCD display from sysfs.
+ *
+ * Return: the size of the message on success, else -ERRNO
+ */
+static ssize_t message_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct img_ascii_lcd_ctx *ctx = dev_get_drvdata(dev);
+ int err;
+
+ err = img_ascii_lcd_display(ctx, buf, count);
+ return err ?: count;
+}
+
+static DEVICE_ATTR_RW(message);
+
+/**
+ * img_ascii_lcd_probe() - probe an LCD display device
+ * @pdev: the LCD platform device
+ *
+ * Probe an LCD display device, ensuring that we have the required resources in
+ * order to access the LCD & setting up private data as well as sysfs files.
+ *
+ * Return: 0 on success, else -ERRNO
+ */
+static int img_ascii_lcd_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ const struct img_ascii_lcd_config *cfg;
+ struct img_ascii_lcd_ctx *ctx;
+ struct resource *res;
+ int err;
+
+ match = of_match_device(img_ascii_lcd_matches, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ cfg = match->data;
+ ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx) + cfg->num_chars,
+ GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ if (cfg->external_regmap) {
+ ctx->regmap = syscon_node_to_regmap(pdev->dev.parent->of_node);
+ if (IS_ERR(ctx->regmap))
+ return PTR_ERR(ctx->regmap);
+
+ if (of_property_read_u32(pdev->dev.of_node, "offset",
+ &ctx->offset))
+ return -EINVAL;
+ } else {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctx->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctx->base))
+ return PTR_ERR(ctx->base);
+ }
+
+ ctx->pdev = pdev;
+ ctx->cfg = cfg;
+ ctx->message = NULL;
+ ctx->scroll_pos = 0;
+ ctx->scroll_rate = HZ / 2;
+
+ /* initialise a timer for scrolling the message */
+ init_timer(&ctx->timer);
+ ctx->timer.function = img_ascii_lcd_scroll;
+ ctx->timer.data = (unsigned long)ctx;
+
+ platform_set_drvdata(pdev, ctx);
+
+ /* display a default message */
+ err = img_ascii_lcd_display(ctx, "Linux " UTS_RELEASE " ", -1);
+ if (err)
+ goto out_del_timer;
+
+ err = device_create_file(&pdev->dev, &dev_attr_message);
+ if (err)
+ goto out_del_timer;
+
+ return 0;
+out_del_timer:
+ del_timer_sync(&ctx->timer);
+ return err;
+}
+
+/**
+ * img_ascii_lcd_remove() - remove an LCD display device
+ * @pdev: the LCD platform device
+ *
+ * Remove an LCD display device, freeing private resources & ensuring that the
+ * driver stops using the LCD display registers.
+ *
+ * Return: 0
+ */
+static int img_ascii_lcd_remove(struct platform_device *pdev)
+{
+ struct img_ascii_lcd_ctx *ctx = platform_get_drvdata(pdev);
+
+ device_remove_file(&pdev->dev, &dev_attr_message);
+ del_timer_sync(&ctx->timer);
+ return 0;
+}
+
+static struct platform_driver img_ascii_lcd_driver = {
+ .driver = {
+ .name = "img-ascii-lcd",
+ .of_match_table = img_ascii_lcd_matches,
+ },
+ .probe = img_ascii_lcd_probe,
+ .remove = img_ascii_lcd_remove,
+};
+module_platform_driver(img_ascii_lcd_driver);
+
+MODULE_DESCRIPTION("Imagination Technologies ASCII LCD Display");
+MODULE_AUTHOR("Paul Burton <paul.burton@mips.com>");
+MODULE_LICENSE("GPL");
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/ks0108.c b/src/kernel/linux/v4.14/drivers/auxdisplay/ks0108.c
new file mode 100644
index 0000000..816de9e
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/ks0108.c
@@ -0,0 +1,201 @@
+/*
+ * 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
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/parport.h>
+#include <linux/uaccess.h>
+#include <linux/ks0108.h>
+
+#define KS0108_NAME "ks0108"
+
+/*
+ * Module Parameters
+ */
+
+static unsigned int ks0108_port = CONFIG_KS0108_PORT;
+module_param(ks0108_port, uint, S_IRUGO);
+MODULE_PARM_DESC(ks0108_port, "Parallel port where the LCD is connected");
+
+static unsigned int ks0108_delay = CONFIG_KS0108_DELAY;
+module_param(ks0108_delay, uint, S_IRUGO);
+MODULE_PARM_DESC(ks0108_delay, "Delay between each control writing (microseconds)");
+
+/*
+ * Device
+ */
+
+static struct parport *ks0108_parport;
+static struct pardevice *ks0108_pardevice;
+
+/*
+ * ks0108 Exported Commands (don't lock)
+ *
+ * You _should_ lock in the top driver: This functions _should not_
+ * get race conditions in any way. Locking for each byte here would be
+ * so slow and useless.
+ *
+ * There are not bit definitions because they are not flags,
+ * just arbitrary combinations defined by the documentation for each
+ * function in the ks0108 LCD controller. If you want to know what means
+ * a specific combination, look at the function's name.
+ *
+ * The ks0108_writecontrol bits need to be reverted ^(0,1,3) because
+ * the parallel port also revert them using a "not" logic gate.
+ */
+
+#define bit(n) (((unsigned char)1)<<(n))
+
+void ks0108_writedata(unsigned char byte)
+{
+ parport_write_data(ks0108_parport, byte);
+}
+
+void ks0108_writecontrol(unsigned char byte)
+{
+ udelay(ks0108_delay);
+ parport_write_control(ks0108_parport, byte ^ (bit(0) | bit(1) | bit(3)));
+}
+
+void ks0108_displaystate(unsigned char state)
+{
+ ks0108_writedata((state ? bit(0) : 0) | bit(1) | bit(2) | bit(3) | bit(4) | bit(5));
+}
+
+void ks0108_startline(unsigned char startline)
+{
+ ks0108_writedata(min_t(unsigned char, startline, 63) | bit(6) |
+ bit(7));
+}
+
+void ks0108_address(unsigned char address)
+{
+ ks0108_writedata(min_t(unsigned char, address, 63) | bit(6));
+}
+
+void ks0108_page(unsigned char page)
+{
+ ks0108_writedata(min_t(unsigned char, page, 7) | bit(3) | bit(4) |
+ bit(5) | bit(7));
+}
+
+EXPORT_SYMBOL_GPL(ks0108_writedata);
+EXPORT_SYMBOL_GPL(ks0108_writecontrol);
+EXPORT_SYMBOL_GPL(ks0108_displaystate);
+EXPORT_SYMBOL_GPL(ks0108_startline);
+EXPORT_SYMBOL_GPL(ks0108_address);
+EXPORT_SYMBOL_GPL(ks0108_page);
+
+/*
+ * Is the module inited?
+ */
+
+static unsigned char ks0108_inited;
+unsigned char ks0108_isinited(void)
+{
+ return ks0108_inited;
+}
+EXPORT_SYMBOL_GPL(ks0108_isinited);
+
+static void ks0108_parport_attach(struct parport *port)
+{
+ struct pardev_cb ks0108_cb;
+
+ if (port->base != ks0108_port)
+ return;
+
+ memset(&ks0108_cb, 0, sizeof(ks0108_cb));
+ ks0108_cb.flags = PARPORT_DEV_EXCL;
+ ks0108_pardevice = parport_register_dev_model(port, KS0108_NAME,
+ &ks0108_cb, 0);
+ if (!ks0108_pardevice) {
+ pr_err("ERROR: parport didn't register new device\n");
+ return;
+ }
+ if (parport_claim(ks0108_pardevice)) {
+ pr_err("could not claim access to parport %i. Aborting.\n",
+ ks0108_port);
+ goto err_unreg_device;
+ }
+
+ ks0108_parport = port;
+ ks0108_inited = 1;
+ return;
+
+err_unreg_device:
+ parport_unregister_device(ks0108_pardevice);
+ ks0108_pardevice = NULL;
+}
+
+static void ks0108_parport_detach(struct parport *port)
+{
+ if (port->base != ks0108_port)
+ return;
+
+ if (!ks0108_pardevice) {
+ pr_err("%s: already unregistered.\n", KS0108_NAME);
+ return;
+ }
+
+ parport_release(ks0108_pardevice);
+ parport_unregister_device(ks0108_pardevice);
+ ks0108_pardevice = NULL;
+ ks0108_parport = NULL;
+}
+
+/*
+ * Module Init & Exit
+ */
+
+static struct parport_driver ks0108_parport_driver = {
+ .name = "ks0108",
+ .match_port = ks0108_parport_attach,
+ .detach = ks0108_parport_detach,
+ .devmodel = true,
+};
+
+static int __init ks0108_init(void)
+{
+ return parport_register_driver(&ks0108_parport_driver);
+}
+
+static void __exit ks0108_exit(void)
+{
+ parport_unregister_driver(&ks0108_parport_driver);
+}
+
+module_init(ks0108_init);
+module_exit(ks0108_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
+MODULE_DESCRIPTION("ks0108 LCD Controller driver");
+
diff --git a/src/kernel/linux/v4.14/drivers/auxdisplay/panel.c b/src/kernel/linux/v4.14/drivers/auxdisplay/panel.c
new file mode 100644
index 0000000..e30953c
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/auxdisplay/panel.c
@@ -0,0 +1,1802 @@
+/*
+ * 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.
+ *
+ * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
+ * serial module compatible with Samsung's KS0074. The pins may be connected in
+ * any combination, everything is programmable.
+ *
+ * The keypad consists in a matrix of push buttons connecting input pins to
+ * data output pins or to the ground. The combinations have to be hard-coded
+ * in the driver, though several profiles exist and adding new ones is easy.
+ *
+ * Several profiles are provided for commonly found LCD+keypad modules on the
+ * market, such as those found in Nexcom's appliances.
+ *
+ * FIXME:
+ * - the initialization/deinitialization process is very dirty and should
+ * be rewritten. It may even be buggy.
+ *
+ * TODO:
+ * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
+ * - make the LCD a part of a virtual screen of Vx*Vy
+ * - make the inputs list smp-safe
+ * - change the keyboard to a double mapping : signals -> key_id -> values
+ * so that applications can change values without knowing signals
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/parport.h>
+#include <linux/list.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <misc/charlcd.h>
+
+#define KEYPAD_MINOR 185
+
+#define LCD_MAXBYTES 256 /* max burst write */
+
+#define KEYPAD_BUFFER 64
+
+/* poll the keyboard this every second */
+#define INPUT_POLL_TIME (HZ / 50)
+/* a key starts to repeat after this times INPUT_POLL_TIME */
+#define KEYPAD_REP_START (10)
+/* a key repeats this times INPUT_POLL_TIME */
+#define KEYPAD_REP_DELAY (2)
+
+/* converts an r_str() input to an active high, bits string : 000BAOSE */
+#define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3)
+
+#define PNL_PBUSY 0x80 /* inverted input, active low */
+#define PNL_PACK 0x40 /* direct input, active low */
+#define PNL_POUTPA 0x20 /* direct input, active high */
+#define PNL_PSELECD 0x10 /* direct input, active high */
+#define PNL_PERRORP 0x08 /* direct input, active low */
+
+#define PNL_PBIDIR 0x20 /* bi-directional ports */
+/* high to read data in or-ed with data out */
+#define PNL_PINTEN 0x10
+#define PNL_PSELECP 0x08 /* inverted output, active low */
+#define PNL_PINITP 0x04 /* direct output, active low */
+#define PNL_PAUTOLF 0x02 /* inverted output, active low */
+#define PNL_PSTROBE 0x01 /* inverted output */
+
+#define PNL_PD0 0x01
+#define PNL_PD1 0x02
+#define PNL_PD2 0x04
+#define PNL_PD3 0x08
+#define PNL_PD4 0x10
+#define PNL_PD5 0x20
+#define PNL_PD6 0x40
+#define PNL_PD7 0x80
+
+#define PIN_NONE 0
+#define PIN_STROBE 1
+#define PIN_D0 2
+#define PIN_D1 3
+#define PIN_D2 4
+#define PIN_D3 5
+#define PIN_D4 6
+#define PIN_D5 7
+#define PIN_D6 8
+#define PIN_D7 9
+#define PIN_AUTOLF 14
+#define PIN_INITP 16
+#define PIN_SELECP 17
+#define PIN_NOT_SET 127
+
+#define NOT_SET -1
+
+/* macros to simplify use of the parallel port */
+#define r_ctr(x) (parport_read_control((x)->port))
+#define r_dtr(x) (parport_read_data((x)->port))
+#define r_str(x) (parport_read_status((x)->port))
+#define w_ctr(x, y) (parport_write_control((x)->port, (y)))
+#define w_dtr(x, y) (parport_write_data((x)->port, (y)))
+
+/* this defines which bits are to be used and which ones to be ignored */
+/* logical or of the output bits involved in the scan matrix */
+static __u8 scan_mask_o;
+/* logical or of the input bits involved in the scan matrix */
+static __u8 scan_mask_i;
+
+enum input_type {
+ INPUT_TYPE_STD,
+ INPUT_TYPE_KBD,
+};
+
+enum input_state {
+ INPUT_ST_LOW,
+ INPUT_ST_RISING,
+ INPUT_ST_HIGH,
+ INPUT_ST_FALLING,
+};
+
+struct logical_input {
+ struct list_head list;
+ __u64 mask;
+ __u64 value;
+ enum input_type type;
+ enum input_state state;
+ __u8 rise_time, fall_time;
+ __u8 rise_timer, fall_timer, high_timer;
+
+ union {
+ struct { /* valid when type == INPUT_TYPE_STD */
+ void (*press_fct)(int);
+ void (*release_fct)(int);
+ int press_data;
+ int release_data;
+ } std;
+ struct { /* valid when type == INPUT_TYPE_KBD */
+ /* strings can be non null-terminated */
+ char press_str[sizeof(void *) + sizeof(int)];
+ char repeat_str[sizeof(void *) + sizeof(int)];
+ char release_str[sizeof(void *) + sizeof(int)];
+ } kbd;
+ } u;
+};
+
+static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */
+
+/* physical contacts history
+ * Physical contacts are a 45 bits string of 9 groups of 5 bits each.
+ * The 8 lower groups correspond to output bits 0 to 7, and the 9th group
+ * corresponds to the ground.
+ * Within each group, bits are stored in the same order as read on the port :
+ * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
+ * So, each __u64 is represented like this :
+ * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
+ * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
+ */
+
+/* what has just been read from the I/O ports */
+static __u64 phys_read;
+/* previous phys_read */
+static __u64 phys_read_prev;
+/* stabilized phys_read (phys_read|phys_read_prev) */
+static __u64 phys_curr;
+/* previous phys_curr */
+static __u64 phys_prev;
+/* 0 means that at least one logical signal needs be computed */
+static char inputs_stable;
+
+/* these variables are specific to the keypad */
+static struct {
+ bool enabled;
+} keypad;
+
+static char keypad_buffer[KEYPAD_BUFFER];
+static int keypad_buflen;
+static int keypad_start;
+static char keypressed;
+static wait_queue_head_t keypad_read_wait;
+
+/* lcd-specific variables */
+static struct {
+ bool enabled;
+ bool initialized;
+
+ int charset;
+ int proto;
+
+ /* TODO: use union here? */
+ struct {
+ int e;
+ int rs;
+ int rw;
+ int cl;
+ int da;
+ int bl;
+ } pins;
+
+ struct charlcd *charlcd;
+} lcd;
+
+/* Needed only for init */
+static int selected_lcd_type = NOT_SET;
+
+/*
+ * Bit masks to convert LCD signals to parallel port outputs.
+ * _d_ are values for data port, _c_ are for control port.
+ * [0] = signal OFF, [1] = signal ON, [2] = mask
+ */
+#define BIT_CLR 0
+#define BIT_SET 1
+#define BIT_MSK 2
+#define BIT_STATES 3
+/*
+ * one entry for each bit on the LCD
+ */
+#define LCD_BIT_E 0
+#define LCD_BIT_RS 1
+#define LCD_BIT_RW 2
+#define LCD_BIT_BL 3
+#define LCD_BIT_CL 4
+#define LCD_BIT_DA 5
+#define LCD_BITS 6
+
+/*
+ * each bit can be either connected to a DATA or CTRL port
+ */
+#define LCD_PORT_C 0
+#define LCD_PORT_D 1
+#define LCD_PORTS 2
+
+static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
+
+/*
+ * LCD protocols
+ */
+#define LCD_PROTO_PARALLEL 0
+#define LCD_PROTO_SERIAL 1
+#define LCD_PROTO_TI_DA8XX_LCD 2
+
+/*
+ * LCD character sets
+ */
+#define LCD_CHARSET_NORMAL 0
+#define LCD_CHARSET_KS0074 1
+
+/*
+ * LCD types
+ */
+#define LCD_TYPE_NONE 0
+#define LCD_TYPE_CUSTOM 1
+#define LCD_TYPE_OLD 2
+#define LCD_TYPE_KS0074 3
+#define LCD_TYPE_HANTRONIX 4
+#define LCD_TYPE_NEXCOM 5
+
+/*
+ * keypad types
+ */
+#define KEYPAD_TYPE_NONE 0
+#define KEYPAD_TYPE_OLD 1
+#define KEYPAD_TYPE_NEW 2
+#define KEYPAD_TYPE_NEXCOM 3
+
+/*
+ * panel profiles
+ */
+#define PANEL_PROFILE_CUSTOM 0
+#define PANEL_PROFILE_OLD 1
+#define PANEL_PROFILE_NEW 2
+#define PANEL_PROFILE_HANTRONIX 3
+#define PANEL_PROFILE_NEXCOM 4
+#define PANEL_PROFILE_LARGE 5
+
+/*
+ * Construct custom config from the kernel's configuration
+ */
+#define DEFAULT_PARPORT 0
+#define DEFAULT_PROFILE PANEL_PROFILE_LARGE
+#define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD
+#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
+
+#define DEFAULT_LCD_PIN_E PIN_AUTOLF
+#define DEFAULT_LCD_PIN_RS PIN_SELECP
+#define DEFAULT_LCD_PIN_RW PIN_INITP
+#define DEFAULT_LCD_PIN_SCL PIN_STROBE
+#define DEFAULT_LCD_PIN_SDA PIN_D0
+#define DEFAULT_LCD_PIN_BL PIN_NOT_SET
+
+#ifdef CONFIG_PANEL_PARPORT
+#undef DEFAULT_PARPORT
+#define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
+#endif
+
+#ifdef CONFIG_PANEL_PROFILE
+#undef DEFAULT_PROFILE
+#define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
+#endif
+
+#if DEFAULT_PROFILE == 0 /* custom */
+#ifdef CONFIG_PANEL_KEYPAD
+#undef DEFAULT_KEYPAD_TYPE
+#define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD
+#endif
+
+#ifdef CONFIG_PANEL_LCD
+#undef DEFAULT_LCD_TYPE
+#define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD
+#endif
+
+#ifdef CONFIG_PANEL_LCD_HEIGHT
+#undef DEFAULT_LCD_HEIGHT
+#define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
+#endif
+
+#ifdef CONFIG_PANEL_LCD_WIDTH
+#undef DEFAULT_LCD_WIDTH
+#define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_BWIDTH
+#undef DEFAULT_LCD_BWIDTH
+#define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_HWIDTH
+#undef DEFAULT_LCD_HWIDTH
+#define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_CHARSET
+#undef DEFAULT_LCD_CHARSET
+#define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PROTO
+#undef DEFAULT_LCD_PROTO
+#define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_E
+#undef DEFAULT_LCD_PIN_E
+#define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_RS
+#undef DEFAULT_LCD_PIN_RS
+#define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_RW
+#undef DEFAULT_LCD_PIN_RW
+#define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_SCL
+#undef DEFAULT_LCD_PIN_SCL
+#define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_SDA
+#undef DEFAULT_LCD_PIN_SDA
+#define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_BL
+#undef DEFAULT_LCD_PIN_BL
+#define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
+#endif
+
+#endif /* DEFAULT_PROFILE == 0 */
+
+/* global variables */
+
+/* Device single-open policy control */
+static atomic_t keypad_available = ATOMIC_INIT(1);
+
+static struct pardevice *pprt;
+
+static int keypad_initialized;
+
+static DEFINE_SPINLOCK(pprt_lock);
+static struct timer_list scan_timer;
+
+MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
+
+static int parport = DEFAULT_PARPORT;
+module_param(parport, int, 0000);
+MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)");
+
+static int profile = DEFAULT_PROFILE;
+module_param(profile, int, 0000);
+MODULE_PARM_DESC(profile,
+ "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
+ "4=16x2 nexcom; default=40x2, old kp");
+
+static int keypad_type = NOT_SET;
+module_param(keypad_type, int, 0000);
+MODULE_PARM_DESC(keypad_type,
+ "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys");
+
+static int lcd_type = NOT_SET;
+module_param(lcd_type, int, 0000);
+MODULE_PARM_DESC(lcd_type,
+ "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
+
+static int lcd_height = NOT_SET;
+module_param(lcd_height, int, 0000);
+MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD");
+
+static int lcd_width = NOT_SET;
+module_param(lcd_width, int, 0000);
+MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD");
+
+static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */
+module_param(lcd_bwidth, int, 0000);
+MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)");
+
+static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */
+module_param(lcd_hwidth, int, 0000);
+MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)");
+
+static int lcd_charset = NOT_SET;
+module_param(lcd_charset, int, 0000);
+MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074");
+
+static int lcd_proto = NOT_SET;
+module_param(lcd_proto, int, 0000);
+MODULE_PARM_DESC(lcd_proto,
+ "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface");
+
+/*
+ * These are the parallel port pins the LCD control signals are connected to.
+ * Set this to 0 if the signal is not used. Set it to its opposite value
+ * (negative) if the signal is negated. -MAXINT is used to indicate that the
+ * pin has not been explicitly specified.
+ *
+ * WARNING! no check will be performed about collisions with keypad !
+ */
+
+static int lcd_e_pin = PIN_NOT_SET;
+module_param(lcd_e_pin, int, 0000);
+MODULE_PARM_DESC(lcd_e_pin,
+ "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
+
+static int lcd_rs_pin = PIN_NOT_SET;
+module_param(lcd_rs_pin, int, 0000);
+MODULE_PARM_DESC(lcd_rs_pin,
+ "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
+
+static int lcd_rw_pin = PIN_NOT_SET;
+module_param(lcd_rw_pin, int, 0000);
+MODULE_PARM_DESC(lcd_rw_pin,
+ "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
+
+static int lcd_cl_pin = PIN_NOT_SET;
+module_param(lcd_cl_pin, int, 0000);
+MODULE_PARM_DESC(lcd_cl_pin,
+ "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)");
+
+static int lcd_da_pin = PIN_NOT_SET;
+module_param(lcd_da_pin, int, 0000);
+MODULE_PARM_DESC(lcd_da_pin,
+ "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)");
+
+static int lcd_bl_pin = PIN_NOT_SET;
+module_param(lcd_bl_pin, int, 0000);
+MODULE_PARM_DESC(lcd_bl_pin,
+ "# of the // port pin connected to LCD backlight, with polarity (-17..17)");
+
+/* Deprecated module parameters - consider not using them anymore */
+
+static int lcd_enabled = NOT_SET;
+module_param(lcd_enabled, int, 0000);
+MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead");
+
+static int keypad_enabled = NOT_SET;
+module_param(keypad_enabled, int, 0000);
+MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
+
+/* for some LCD drivers (ks0074) we need a charset conversion table. */
+static const unsigned char lcd_char_conv_ks0074[256] = {
+ /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */
+ /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27,
+ /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+ /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+ /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+ /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+ /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+ /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4,
+ /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+ /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+ /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+ /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20,
+ /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+ /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+ /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+ /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+ /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f,
+ /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96,
+ /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd,
+ /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60,
+ /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9,
+ /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3,
+ /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78,
+ /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe,
+ /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8,
+ /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69,
+ /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25,
+ /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79,
+};
+
+static const char old_keypad_profile[][4][9] = {
+ {"S0", "Left\n", "Left\n", ""},
+ {"S1", "Down\n", "Down\n", ""},
+ {"S2", "Up\n", "Up\n", ""},
+ {"S3", "Right\n", "Right\n", ""},
+ {"S4", "Esc\n", "Esc\n", ""},
+ {"S5", "Ret\n", "Ret\n", ""},
+ {"", "", "", ""}
+};
+
+/* signals, press, repeat, release */
+static const char new_keypad_profile[][4][9] = {
+ {"S0", "Left\n", "Left\n", ""},
+ {"S1", "Down\n", "Down\n", ""},
+ {"S2", "Up\n", "Up\n", ""},
+ {"S3", "Right\n", "Right\n", ""},
+ {"S4s5", "", "Esc\n", "Esc\n"},
+ {"s4S5", "", "Ret\n", "Ret\n"},
+ {"S4S5", "Help\n", "", ""},
+ /* add new signals above this line */
+ {"", "", "", ""}
+};
+
+/* signals, press, repeat, release */
+static const char nexcom_keypad_profile[][4][9] = {
+ {"a-p-e-", "Down\n", "Down\n", ""},
+ {"a-p-E-", "Ret\n", "Ret\n", ""},
+ {"a-P-E-", "Esc\n", "Esc\n", ""},
+ {"a-P-e-", "Up\n", "Up\n", ""},
+ /* add new signals above this line */
+ {"", "", "", ""}
+};
+
+static const char (*keypad_profile)[4][9] = old_keypad_profile;
+
+static DECLARE_BITMAP(bits, LCD_BITS);
+
+static void lcd_get_bits(unsigned int port, int *val)
+{
+ unsigned int bit, state;
+
+ for (bit = 0; bit < LCD_BITS; bit++) {
+ state = test_bit(bit, bits) ? BIT_SET : BIT_CLR;
+ *val &= lcd_bits[port][bit][BIT_MSK];
+ *val |= lcd_bits[port][bit][state];
+ }
+}
+
+/* sets data port bits according to current signals values */
+static int set_data_bits(void)
+{
+ int val;
+
+ val = r_dtr(pprt);
+ lcd_get_bits(LCD_PORT_D, &val);
+ w_dtr(pprt, val);
+ return val;
+}
+
+/* sets ctrl port bits according to current signals values */
+static int set_ctrl_bits(void)
+{
+ int val;
+
+ val = r_ctr(pprt);
+ lcd_get_bits(LCD_PORT_C, &val);
+ w_ctr(pprt, val);
+ return val;
+}
+
+/* sets ctrl & data port bits according to current signals values */
+static void panel_set_bits(void)
+{
+ set_data_bits();
+ set_ctrl_bits();
+}
+
+/*
+ * Converts a parallel port pin (from -25 to 25) to data and control ports
+ * masks, and data and control port bits. The signal will be considered
+ * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
+ *
+ * Result will be used this way :
+ * out(dport, in(dport) & d_val[2] | d_val[signal_state])
+ * out(cport, in(cport) & c_val[2] | c_val[signal_state])
+ */
+static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val)
+{
+ int d_bit, c_bit, inv;
+
+ d_val[0] = 0;
+ c_val[0] = 0;
+ d_val[1] = 0;
+ c_val[1] = 0;
+ d_val[2] = 0xFF;
+ c_val[2] = 0xFF;
+
+ if (pin == 0)
+ return;
+
+ inv = (pin < 0);
+ if (inv)
+ pin = -pin;
+
+ d_bit = 0;
+ c_bit = 0;
+
+ switch (pin) {
+ case PIN_STROBE: /* strobe, inverted */
+ c_bit = PNL_PSTROBE;
+ inv = !inv;
+ break;
+ case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */
+ d_bit = 1 << (pin - 2);
+ break;
+ case PIN_AUTOLF: /* autofeed, inverted */
+ c_bit = PNL_PAUTOLF;
+ inv = !inv;
+ break;
+ case PIN_INITP: /* init, direct */
+ c_bit = PNL_PINITP;
+ break;
+ case PIN_SELECP: /* select_in, inverted */
+ c_bit = PNL_PSELECP;
+ inv = !inv;
+ break;
+ default: /* unknown pin, ignore */
+ break;
+ }
+
+ if (c_bit) {
+ c_val[2] &= ~c_bit;
+ c_val[!inv] = c_bit;
+ } else if (d_bit) {
+ d_val[2] &= ~d_bit;
+ d_val[!inv] = d_bit;
+ }
+}
+
+/*
+ * send a serial byte to the LCD panel. The caller is responsible for locking
+ * if needed.
+ */
+static void lcd_send_serial(int byte)
+{
+ int bit;
+
+ /*
+ * the data bit is set on D0, and the clock on STROBE.
+ * LCD reads D0 on STROBE's rising edge.
+ */
+ for (bit = 0; bit < 8; bit++) {
+ clear_bit(LCD_BIT_CL, bits); /* CLK low */
+ panel_set_bits();
+ if (byte & 1) {
+ set_bit(LCD_BIT_DA, bits);
+ } else {
+ clear_bit(LCD_BIT_DA, bits);
+ }
+
+ panel_set_bits();
+ udelay(2); /* maintain the data during 2 us before CLK up */
+ set_bit(LCD_BIT_CL, bits); /* CLK high */
+ panel_set_bits();
+ udelay(1); /* maintain the strobe during 1 us */
+ byte >>= 1;
+ }
+}
+
+/* turn the backlight on or off */
+static void lcd_backlight(struct charlcd *charlcd, int on)
+{
+ if (lcd.pins.bl == PIN_NONE)
+ return;
+
+ /* The backlight is activated by setting the AUTOFEED line to +5V */
+ spin_lock_irq(&pprt_lock);
+ if (on)
+ set_bit(LCD_BIT_BL, bits);
+ else
+ clear_bit(LCD_BIT_BL, bits);
+ panel_set_bits();
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the LCD panel in serial mode */
+static void lcd_write_cmd_s(struct charlcd *charlcd, int cmd)
+{
+ spin_lock_irq(&pprt_lock);
+ lcd_send_serial(0x1F); /* R/W=W, RS=0 */
+ lcd_send_serial(cmd & 0x0F);
+ lcd_send_serial((cmd >> 4) & 0x0F);
+ udelay(40); /* the shortest command takes at least 40 us */
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the LCD panel in serial mode */
+static void lcd_write_data_s(struct charlcd *charlcd, int data)
+{
+ spin_lock_irq(&pprt_lock);
+ lcd_send_serial(0x5F); /* R/W=W, RS=1 */
+ lcd_send_serial(data & 0x0F);
+ lcd_send_serial((data >> 4) & 0x0F);
+ udelay(40); /* the shortest data takes at least 40 us */
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the LCD panel in 8 bits parallel mode */
+static void lcd_write_cmd_p8(struct charlcd *charlcd, int cmd)
+{
+ spin_lock_irq(&pprt_lock);
+ /* present the data to the data port */
+ w_dtr(pprt, cmd);
+ udelay(20); /* maintain the data during 20 us before the strobe */
+
+ set_bit(LCD_BIT_E, bits);
+ clear_bit(LCD_BIT_RS, bits);
+ clear_bit(LCD_BIT_RW, bits);
+ set_ctrl_bits();
+
+ udelay(40); /* maintain the strobe during 40 us */
+
+ clear_bit(LCD_BIT_E, bits);
+ set_ctrl_bits();
+
+ udelay(120); /* the shortest command takes at least 120 us */
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the LCD panel in 8 bits parallel mode */
+static void lcd_write_data_p8(struct charlcd *charlcd, int data)
+{
+ spin_lock_irq(&pprt_lock);
+ /* present the data to the data port */
+ w_dtr(pprt, data);
+ udelay(20); /* maintain the data during 20 us before the strobe */
+
+ set_bit(LCD_BIT_E, bits);
+ set_bit(LCD_BIT_RS, bits);
+ clear_bit(LCD_BIT_RW, bits);
+ set_ctrl_bits();
+
+ udelay(40); /* maintain the strobe during 40 us */
+
+ clear_bit(LCD_BIT_E, bits);
+ set_ctrl_bits();
+
+ udelay(45); /* the shortest data takes at least 45 us */
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the TI LCD panel */
+static void lcd_write_cmd_tilcd(struct charlcd *charlcd, int cmd)
+{
+ spin_lock_irq(&pprt_lock);
+ /* present the data to the control port */
+ w_ctr(pprt, cmd);
+ udelay(60);
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the TI LCD panel */
+static void lcd_write_data_tilcd(struct charlcd *charlcd, int data)
+{
+ spin_lock_irq(&pprt_lock);
+ /* present the data to the data port */
+ w_dtr(pprt, data);
+ udelay(60);
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_s(struct charlcd *charlcd)
+{
+ int pos;
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ lcd_send_serial(0x5F); /* R/W=W, RS=1 */
+ lcd_send_serial(' ' & 0x0F);
+ lcd_send_serial((' ' >> 4) & 0x0F);
+ /* the shortest data takes at least 40 us */
+ udelay(40);
+ }
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_p8(struct charlcd *charlcd)
+{
+ int pos;
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ /* present the data to the data port */
+ w_dtr(pprt, ' ');
+
+ /* maintain the data during 20 us before the strobe */
+ udelay(20);
+
+ set_bit(LCD_BIT_E, bits);
+ set_bit(LCD_BIT_RS, bits);
+ clear_bit(LCD_BIT_RW, bits);
+ set_ctrl_bits();
+
+ /* maintain the strobe during 40 us */
+ udelay(40);
+
+ clear_bit(LCD_BIT_E, bits);
+ set_ctrl_bits();
+
+ /* the shortest data takes at least 45 us */
+ udelay(45);
+ }
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_tilcd(struct charlcd *charlcd)
+{
+ int pos;
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) {
+ /* present the data to the data port */
+ w_dtr(pprt, ' ');
+ udelay(60);
+ }
+
+ spin_unlock_irq(&pprt_lock);
+}
+
+static const struct charlcd_ops charlcd_serial_ops = {
+ .write_cmd = lcd_write_cmd_s,
+ .write_data = lcd_write_data_s,
+ .clear_fast = lcd_clear_fast_s,
+ .backlight = lcd_backlight,
+};
+
+static const struct charlcd_ops charlcd_parallel_ops = {
+ .write_cmd = lcd_write_cmd_p8,
+ .write_data = lcd_write_data_p8,
+ .clear_fast = lcd_clear_fast_p8,
+ .backlight = lcd_backlight,
+};
+
+static const struct charlcd_ops charlcd_tilcd_ops = {
+ .write_cmd = lcd_write_cmd_tilcd,
+ .write_data = lcd_write_data_tilcd,
+ .clear_fast = lcd_clear_fast_tilcd,
+ .backlight = lcd_backlight,
+};
+
+/* initialize the LCD driver */
+static void lcd_init(void)
+{
+ struct charlcd *charlcd;
+
+ charlcd = charlcd_alloc(0);
+ if (!charlcd)
+ return;
+
+ /*
+ * Init lcd struct with load-time values to preserve exact
+ * current functionality (at least for now).
+ */
+ charlcd->height = lcd_height;
+ charlcd->width = lcd_width;
+ charlcd->bwidth = lcd_bwidth;
+ charlcd->hwidth = lcd_hwidth;
+
+ switch (selected_lcd_type) {
+ case LCD_TYPE_OLD:
+ /* parallel mode, 8 bits */
+ lcd.proto = LCD_PROTO_PARALLEL;
+ lcd.charset = LCD_CHARSET_NORMAL;
+ lcd.pins.e = PIN_STROBE;
+ lcd.pins.rs = PIN_AUTOLF;
+
+ charlcd->width = 40;
+ charlcd->bwidth = 40;
+ charlcd->hwidth = 64;
+ charlcd->height = 2;
+ break;
+ case LCD_TYPE_KS0074:
+ /* serial mode, ks0074 */
+ lcd.proto = LCD_PROTO_SERIAL;
+ lcd.charset = LCD_CHARSET_KS0074;
+ lcd.pins.bl = PIN_AUTOLF;
+ lcd.pins.cl = PIN_STROBE;
+ lcd.pins.da = PIN_D0;
+
+ charlcd->width = 16;
+ charlcd->bwidth = 40;
+ charlcd->hwidth = 16;
+ charlcd->height = 2;
+ break;
+ case LCD_TYPE_NEXCOM:
+ /* parallel mode, 8 bits, generic */
+ lcd.proto = LCD_PROTO_PARALLEL;
+ lcd.charset = LCD_CHARSET_NORMAL;
+ lcd.pins.e = PIN_AUTOLF;
+ lcd.pins.rs = PIN_SELECP;
+ lcd.pins.rw = PIN_INITP;
+
+ charlcd->width = 16;
+ charlcd->bwidth = 40;
+ charlcd->hwidth = 64;
+ charlcd->height = 2;
+ break;
+ case LCD_TYPE_CUSTOM:
+ /* customer-defined */
+ lcd.proto = DEFAULT_LCD_PROTO;
+ lcd.charset = DEFAULT_LCD_CHARSET;
+ /* default geometry will be set later */
+ break;
+ case LCD_TYPE_HANTRONIX:
+ /* parallel mode, 8 bits, hantronix-like */
+ default:
+ lcd.proto = LCD_PROTO_PARALLEL;
+ lcd.charset = LCD_CHARSET_NORMAL;
+ lcd.pins.e = PIN_STROBE;
+ lcd.pins.rs = PIN_SELECP;
+
+ charlcd->width = 16;
+ charlcd->bwidth = 40;
+ charlcd->hwidth = 64;
+ charlcd->height = 2;
+ break;
+ }
+
+ /* Overwrite with module params set on loading */
+ if (lcd_height != NOT_SET)
+ charlcd->height = lcd_height;
+ if (lcd_width != NOT_SET)
+ charlcd->width = lcd_width;
+ if (lcd_bwidth != NOT_SET)
+ charlcd->bwidth = lcd_bwidth;
+ if (lcd_hwidth != NOT_SET)
+ charlcd->hwidth = lcd_hwidth;
+ if (lcd_charset != NOT_SET)
+ lcd.charset = lcd_charset;
+ if (lcd_proto != NOT_SET)
+ lcd.proto = lcd_proto;
+ if (lcd_e_pin != PIN_NOT_SET)
+ lcd.pins.e = lcd_e_pin;
+ if (lcd_rs_pin != PIN_NOT_SET)
+ lcd.pins.rs = lcd_rs_pin;
+ if (lcd_rw_pin != PIN_NOT_SET)
+ lcd.pins.rw = lcd_rw_pin;
+ if (lcd_cl_pin != PIN_NOT_SET)
+ lcd.pins.cl = lcd_cl_pin;
+ if (lcd_da_pin != PIN_NOT_SET)
+ lcd.pins.da = lcd_da_pin;
+ if (lcd_bl_pin != PIN_NOT_SET)
+ lcd.pins.bl = lcd_bl_pin;
+
+ /* 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 (charlcd->height <= 0)
+ charlcd->height = DEFAULT_LCD_HEIGHT;
+
+ if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */
+ charlcd->ops = &charlcd_serial_ops;
+
+ if (lcd.pins.cl == PIN_NOT_SET)
+ lcd.pins.cl = DEFAULT_LCD_PIN_SCL;
+ if (lcd.pins.da == PIN_NOT_SET)
+ lcd.pins.da = DEFAULT_LCD_PIN_SDA;
+
+ } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */
+ charlcd->ops = &charlcd_parallel_ops;
+
+ if (lcd.pins.e == PIN_NOT_SET)
+ lcd.pins.e = DEFAULT_LCD_PIN_E;
+ if (lcd.pins.rs == PIN_NOT_SET)
+ lcd.pins.rs = DEFAULT_LCD_PIN_RS;
+ if (lcd.pins.rw == PIN_NOT_SET)
+ lcd.pins.rw = DEFAULT_LCD_PIN_RW;
+ } else {
+ charlcd->ops = &charlcd_tilcd_ops;
+ }
+
+ if (lcd.pins.bl == PIN_NOT_SET)
+ lcd.pins.bl = DEFAULT_LCD_PIN_BL;
+
+ if (lcd.pins.e == PIN_NOT_SET)
+ lcd.pins.e = PIN_NONE;
+ if (lcd.pins.rs == PIN_NOT_SET)
+ lcd.pins.rs = PIN_NONE;
+ if (lcd.pins.rw == PIN_NOT_SET)
+ lcd.pins.rw = PIN_NONE;
+ if (lcd.pins.bl == PIN_NOT_SET)
+ lcd.pins.bl = PIN_NONE;
+ if (lcd.pins.cl == PIN_NOT_SET)
+ lcd.pins.cl = PIN_NONE;
+ if (lcd.pins.da == PIN_NOT_SET)
+ lcd.pins.da = PIN_NONE;
+
+ if (lcd.charset == NOT_SET)
+ lcd.charset = DEFAULT_LCD_CHARSET;
+
+ if (lcd.charset == LCD_CHARSET_KS0074)
+ charlcd->char_conv = lcd_char_conv_ks0074;
+ else
+ charlcd->char_conv = NULL;
+
+ pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E],
+ lcd_bits[LCD_PORT_C][LCD_BIT_E]);
+ pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
+ lcd_bits[LCD_PORT_C][LCD_BIT_RS]);
+ pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
+ lcd_bits[LCD_PORT_C][LCD_BIT_RW]);
+ pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
+ lcd_bits[LCD_PORT_C][LCD_BIT_BL]);
+ pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
+ lcd_bits[LCD_PORT_C][LCD_BIT_CL]);
+ pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
+ lcd_bits[LCD_PORT_C][LCD_BIT_DA]);
+
+ lcd.charlcd = charlcd;
+ lcd.initialized = true;
+}
+
+/*
+ * These are the file operation function for user access to /dev/keypad
+ */
+
+static ssize_t keypad_read(struct file *file,
+ char __user *buf, size_t count, loff_t *ppos)
+{
+ unsigned i = *ppos;
+ char __user *tmp = buf;
+
+ if (keypad_buflen == 0) {
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ if (wait_event_interruptible(keypad_read_wait,
+ keypad_buflen != 0))
+ return -EINTR;
+ }
+
+ for (; count-- > 0 && (keypad_buflen > 0);
+ ++i, ++tmp, --keypad_buflen) {
+ put_user(keypad_buffer[keypad_start], tmp);
+ keypad_start = (keypad_start + 1) % KEYPAD_BUFFER;
+ }
+ *ppos = i;
+
+ return tmp - buf;
+}
+
+static int keypad_open(struct inode *inode, struct file *file)
+{
+ int ret;
+
+ ret = -EBUSY;
+ if (!atomic_dec_and_test(&keypad_available))
+ goto fail; /* open only once at a time */
+
+ ret = -EPERM;
+ if (file->f_mode & FMODE_WRITE) /* device is read-only */
+ goto fail;
+
+ keypad_buflen = 0; /* flush the buffer on opening */
+ return 0;
+ fail:
+ atomic_inc(&keypad_available);
+ return ret;
+}
+
+static int keypad_release(struct inode *inode, struct file *file)
+{
+ atomic_inc(&keypad_available);
+ return 0;
+}
+
+static const struct file_operations keypad_fops = {
+ .read = keypad_read, /* read */
+ .open = keypad_open, /* open */
+ .release = keypad_release, /* close */
+ .llseek = default_llseek,
+};
+
+static struct miscdevice keypad_dev = {
+ .minor = KEYPAD_MINOR,
+ .name = "keypad",
+ .fops = &keypad_fops,
+};
+
+static void keypad_send_key(const char *string, int max_len)
+{
+ /* send the key to the device only if a process is attached to it. */
+ if (!atomic_read(&keypad_available)) {
+ while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) {
+ keypad_buffer[(keypad_start + keypad_buflen++) %
+ KEYPAD_BUFFER] = *string++;
+ }
+ wake_up_interruptible(&keypad_read_wait);
+ }
+}
+
+/* this function scans all the bits involving at least one logical signal,
+ * and puts the results in the bitfield "phys_read" (one bit per established
+ * contact), and sets "phys_read_prev" to "phys_read".
+ *
+ * Note: to debounce input signals, we will only consider as switched a signal
+ * which is stable across 2 measures. Signals which are different between two
+ * reads will be kept as they previously were in their logical form (phys_prev).
+ * A signal which has just switched will have a 1 in
+ * (phys_read ^ phys_read_prev).
+ */
+static void phys_scan_contacts(void)
+{
+ int bit, bitval;
+ char oldval;
+ char bitmask;
+ char gndmask;
+
+ phys_prev = phys_curr;
+ phys_read_prev = phys_read;
+ phys_read = 0; /* flush all signals */
+
+ /* keep track of old value, with all outputs disabled */
+ oldval = r_dtr(pprt) | scan_mask_o;
+ /* activate all keyboard outputs (active low) */
+ w_dtr(pprt, oldval & ~scan_mask_o);
+
+ /* will have a 1 for each bit set to gnd */
+ bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
+ /* disable all matrix signals */
+ w_dtr(pprt, oldval);
+
+ /* now that all outputs are cleared, the only active input bits are
+ * directly connected to the ground
+ */
+
+ /* 1 for each grounded input */
+ gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
+
+ /* grounded inputs are signals 40-44 */
+ phys_read |= (__u64)gndmask << 40;
+
+ if (bitmask != gndmask) {
+ /*
+ * since clearing the outputs changed some inputs, we know
+ * that some input signals are currently tied to some outputs.
+ * So we'll scan them.
+ */
+ for (bit = 0; bit < 8; bit++) {
+ bitval = BIT(bit);
+
+ if (!(scan_mask_o & bitval)) /* skip unused bits */
+ continue;
+
+ w_dtr(pprt, oldval & ~bitval); /* enable this output */
+ bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask;
+ phys_read |= (__u64)bitmask << (5 * bit);
+ }
+ w_dtr(pprt, oldval); /* disable all outputs */
+ }
+ /*
+ * this is easy: use old bits when they are flapping,
+ * use new ones when stable
+ */
+ phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) |
+ (phys_read & ~(phys_read ^ phys_read_prev));
+}
+
+static inline int input_state_high(struct logical_input *input)
+{
+#if 0
+ /* FIXME:
+ * this is an invalid test. It tries to catch
+ * transitions from single-key to multiple-key, but
+ * doesn't take into account the contacts polarity.
+ * The only solution to the problem is to parse keys
+ * from the most complex to the simplest combinations,
+ * and mark them as 'caught' once a combination
+ * matches, then unmatch it for all other ones.
+ */
+
+ /* try to catch dangerous transitions cases :
+ * someone adds a bit, so this signal was a false
+ * positive resulting from a transition. We should
+ * invalidate the signal immediately and not call the
+ * release function.
+ * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release.
+ */
+ if (((phys_prev & input->mask) == input->value) &&
+ ((phys_curr & input->mask) > input->value)) {
+ input->state = INPUT_ST_LOW; /* invalidate */
+ return 1;
+ }
+#endif
+
+ if ((phys_curr & input->mask) == input->value) {
+ if ((input->type == INPUT_TYPE_STD) &&
+ (input->high_timer == 0)) {
+ input->high_timer++;
+ if (input->u.std.press_fct)
+ input->u.std.press_fct(input->u.std.press_data);
+ } else if (input->type == INPUT_TYPE_KBD) {
+ /* will turn on the light */
+ keypressed = 1;
+
+ if (input->high_timer == 0) {
+ char *press_str = input->u.kbd.press_str;
+
+ if (press_str[0]) {
+ int s = sizeof(input->u.kbd.press_str);
+
+ keypad_send_key(press_str, s);
+ }
+ }
+
+ if (input->u.kbd.repeat_str[0]) {
+ char *repeat_str = input->u.kbd.repeat_str;
+
+ if (input->high_timer >= KEYPAD_REP_START) {
+ int s = sizeof(input->u.kbd.repeat_str);
+
+ input->high_timer -= KEYPAD_REP_DELAY;
+ keypad_send_key(repeat_str, s);
+ }
+ /* we will need to come back here soon */
+ inputs_stable = 0;
+ }
+
+ if (input->high_timer < 255)
+ input->high_timer++;
+ }
+ return 1;
+ }
+
+ /* else signal falling down. Let's fall through. */
+ input->state = INPUT_ST_FALLING;
+ input->fall_timer = 0;
+
+ return 0;
+}
+
+static inline void input_state_falling(struct logical_input *input)
+{
+#if 0
+ /* FIXME !!! same comment as in input_state_high */
+ if (((phys_prev & input->mask) == input->value) &&
+ ((phys_curr & input->mask) > input->value)) {
+ input->state = INPUT_ST_LOW; /* invalidate */
+ return;
+ }
+#endif
+
+ if ((phys_curr & input->mask) == input->value) {
+ if (input->type == INPUT_TYPE_KBD) {
+ /* will turn on the light */
+ keypressed = 1;
+
+ if (input->u.kbd.repeat_str[0]) {
+ char *repeat_str = input->u.kbd.repeat_str;
+
+ if (input->high_timer >= KEYPAD_REP_START) {
+ int s = sizeof(input->u.kbd.repeat_str);
+
+ input->high_timer -= KEYPAD_REP_DELAY;
+ keypad_send_key(repeat_str, s);
+ }
+ /* we will need to come back here soon */
+ inputs_stable = 0;
+ }
+
+ if (input->high_timer < 255)
+ input->high_timer++;
+ }
+ input->state = INPUT_ST_HIGH;
+ } else if (input->fall_timer >= input->fall_time) {
+ /* call release event */
+ if (input->type == INPUT_TYPE_STD) {
+ void (*release_fct)(int) = input->u.std.release_fct;
+
+ if (release_fct)
+ release_fct(input->u.std.release_data);
+ } else if (input->type == INPUT_TYPE_KBD) {
+ char *release_str = input->u.kbd.release_str;
+
+ if (release_str[0]) {
+ int s = sizeof(input->u.kbd.release_str);
+
+ keypad_send_key(release_str, s);
+ }
+ }
+
+ input->state = INPUT_ST_LOW;
+ } else {
+ input->fall_timer++;
+ inputs_stable = 0;
+ }
+}
+
+static void panel_process_inputs(void)
+{
+ struct logical_input *input;
+
+ keypressed = 0;
+ inputs_stable = 1;
+ list_for_each_entry(input, &logical_inputs, list) {
+ switch (input->state) {
+ case INPUT_ST_LOW:
+ if ((phys_curr & input->mask) != input->value)
+ break;
+ /* if all needed ones were already set previously,
+ * this means that this logical signal has been
+ * activated by the releasing of another combined
+ * signal, so we don't want to match.
+ * eg: AB -(release B)-> A -(release A)-> 0 :
+ * don't match A.
+ */
+ if ((phys_prev & input->mask) == input->value)
+ break;
+ input->rise_timer = 0;
+ input->state = INPUT_ST_RISING;
+ /* no break here, fall through */
+ case INPUT_ST_RISING:
+ if ((phys_curr & input->mask) != input->value) {
+ input->state = INPUT_ST_LOW;
+ break;
+ }
+ if (input->rise_timer < input->rise_time) {
+ inputs_stable = 0;
+ input->rise_timer++;
+ break;
+ }
+ input->high_timer = 0;
+ input->state = INPUT_ST_HIGH;
+ /* no break here, fall through */
+ case INPUT_ST_HIGH:
+ if (input_state_high(input))
+ break;
+ /* no break here, fall through */
+ case INPUT_ST_FALLING:
+ input_state_falling(input);
+ }
+ }
+}
+
+static void panel_scan_timer(void)
+{
+ if (keypad.enabled && keypad_initialized) {
+ if (spin_trylock_irq(&pprt_lock)) {
+ phys_scan_contacts();
+
+ /* no need for the parport anymore */
+ spin_unlock_irq(&pprt_lock);
+ }
+
+ if (!inputs_stable || phys_curr != phys_prev)
+ panel_process_inputs();
+ }
+
+ if (keypressed && lcd.enabled && lcd.initialized)
+ charlcd_poke(lcd.charlcd);
+
+ mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME);
+}
+
+static void init_scan_timer(void)
+{
+ if (scan_timer.function)
+ return; /* already started */
+
+ setup_timer(&scan_timer, (void *)&panel_scan_timer, 0);
+ scan_timer.expires = jiffies + INPUT_POLL_TIME;
+ add_timer(&scan_timer);
+}
+
+/* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
+ * if <omask> or <imask> are non-null, they will be or'ed with the bits
+ * corresponding to out and in bits respectively.
+ * returns 1 if ok, 0 if error (in which case, nothing is written).
+ */
+static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value,
+ u8 *imask, u8 *omask)
+{
+ const char sigtab[] = "EeSsPpAaBb";
+ u8 im, om;
+ __u64 m, v;
+
+ om = 0;
+ im = 0;
+ m = 0ULL;
+ v = 0ULL;
+ while (*name) {
+ int in, out, bit, neg;
+ const char *idx;
+
+ idx = strchr(sigtab, *name);
+ if (!idx)
+ return 0; /* input name not found */
+
+ in = idx - sigtab;
+ neg = (in & 1); /* odd (lower) names are negated */
+ in >>= 1;
+ im |= BIT(in);
+
+ name++;
+ if (*name >= '0' && *name <= '7') {
+ out = *name - '0';
+ om |= BIT(out);
+ } else if (*name == '-') {
+ out = 8;
+ } else {
+ return 0; /* unknown bit name */
+ }
+
+ bit = (out * 5) + in;
+
+ m |= 1ULL << bit;
+ if (!neg)
+ v |= 1ULL << bit;
+ name++;
+ }
+ *mask = m;
+ *value = v;
+ if (imask)
+ *imask |= im;
+ if (omask)
+ *omask |= om;
+ return 1;
+}
+
+/* tries to bind a key to the signal name <name>. The key will send the
+ * strings <press>, <repeat>, <release> for these respective events.
+ * Returns the pointer to the new key if ok, NULL if the key could not be bound.
+ */
+static struct logical_input *panel_bind_key(const char *name, const char *press,
+ const char *repeat,
+ const char *release)
+{
+ struct logical_input *key;
+
+ key = kzalloc(sizeof(*key), GFP_KERNEL);
+ if (!key)
+ return NULL;
+
+ if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i,
+ &scan_mask_o)) {
+ kfree(key);
+ return NULL;
+ }
+
+ key->type = INPUT_TYPE_KBD;
+ key->state = INPUT_ST_LOW;
+ key->rise_time = 1;
+ key->fall_time = 1;
+
+ strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
+ strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
+ strncpy(key->u.kbd.release_str, release,
+ sizeof(key->u.kbd.release_str));
+ list_add(&key->list, &logical_inputs);
+ return key;
+}
+
+#if 0
+/* tries to bind a callback function to the signal name <name>. The function
+ * <press_fct> will be called with the <press_data> arg when the signal is
+ * activated, and so on for <release_fct>/<release_data>
+ * Returns the pointer to the new signal if ok, NULL if the signal could not
+ * be bound.
+ */
+static struct logical_input *panel_bind_callback(char *name,
+ void (*press_fct)(int),
+ int press_data,
+ void (*release_fct)(int),
+ int release_data)
+{
+ struct logical_input *callback;
+
+ callback = kmalloc(sizeof(*callback), GFP_KERNEL);
+ if (!callback)
+ return NULL;
+
+ memset(callback, 0, sizeof(struct logical_input));
+ if (!input_name2mask(name, &callback->mask, &callback->value,
+ &scan_mask_i, &scan_mask_o))
+ return NULL;
+
+ callback->type = INPUT_TYPE_STD;
+ callback->state = INPUT_ST_LOW;
+ callback->rise_time = 1;
+ callback->fall_time = 1;
+ callback->u.std.press_fct = press_fct;
+ callback->u.std.press_data = press_data;
+ callback->u.std.release_fct = release_fct;
+ callback->u.std.release_data = release_data;
+ list_add(&callback->list, &logical_inputs);
+ return callback;
+}
+#endif
+
+static void keypad_init(void)
+{
+ int keynum;
+
+ init_waitqueue_head(&keypad_read_wait);
+ keypad_buflen = 0; /* flushes any eventual noisy keystroke */
+
+ /* Let's create all known keys */
+
+ for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) {
+ panel_bind_key(keypad_profile[keynum][0],
+ keypad_profile[keynum][1],
+ keypad_profile[keynum][2],
+ keypad_profile[keynum][3]);
+ }
+
+ init_scan_timer();
+ keypad_initialized = 1;
+}
+
+/**************************************************/
+/* device initialization */
+/**************************************************/
+
+static void panel_attach(struct parport *port)
+{
+ struct pardev_cb panel_cb;
+
+ if (port->number != parport)
+ return;
+
+ if (pprt) {
+ pr_err("%s: port->number=%d parport=%d, already registered!\n",
+ __func__, port->number, parport);
+ return;
+ }
+
+ memset(&panel_cb, 0, sizeof(panel_cb));
+ panel_cb.private = &pprt;
+ /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */
+
+ pprt = parport_register_dev_model(port, "panel", &panel_cb, 0);
+ if (!pprt) {
+ pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n",
+ __func__, port->number, parport);
+ return;
+ }
+
+ if (parport_claim(pprt)) {
+ pr_err("could not claim access to parport%d. Aborting.\n",
+ parport);
+ goto err_unreg_device;
+ }
+
+ /* must init LCD first, just in case an IRQ from the keypad is
+ * generated at keypad init
+ */
+ if (lcd.enabled) {
+ lcd_init();
+ if (!lcd.charlcd || charlcd_register(lcd.charlcd))
+ goto err_unreg_device;
+ }
+
+ if (keypad.enabled) {
+ keypad_init();
+ if (misc_register(&keypad_dev))
+ goto err_lcd_unreg;
+ }
+ return;
+
+err_lcd_unreg:
+ if (scan_timer.function)
+ del_timer_sync(&scan_timer);
+ if (lcd.enabled)
+ charlcd_unregister(lcd.charlcd);
+err_unreg_device:
+ kfree(lcd.charlcd);
+ lcd.charlcd = NULL;
+ parport_unregister_device(pprt);
+ pprt = NULL;
+}
+
+static void panel_detach(struct parport *port)
+{
+ if (port->number != parport)
+ return;
+
+ if (!pprt) {
+ pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n",
+ __func__, port->number, parport);
+ return;
+ }
+ if (scan_timer.function)
+ del_timer_sync(&scan_timer);
+
+ if (keypad.enabled) {
+ misc_deregister(&keypad_dev);
+ keypad_initialized = 0;
+ }
+
+ if (lcd.enabled) {
+ charlcd_unregister(lcd.charlcd);
+ lcd.initialized = false;
+ kfree(lcd.charlcd);
+ lcd.charlcd = NULL;
+ }
+
+ /* TODO: free all input signals */
+ parport_release(pprt);
+ parport_unregister_device(pprt);
+ pprt = NULL;
+}
+
+static struct parport_driver panel_driver = {
+ .name = "panel",
+ .match_port = panel_attach,
+ .detach = panel_detach,
+ .devmodel = true,
+};
+
+/* init function */
+static int __init panel_init_module(void)
+{
+ int selected_keypad_type = NOT_SET, err;
+
+ /* take care of an eventual profile */
+ switch (profile) {
+ case PANEL_PROFILE_CUSTOM:
+ /* custom profile */
+ selected_keypad_type = DEFAULT_KEYPAD_TYPE;
+ selected_lcd_type = DEFAULT_LCD_TYPE;
+ break;
+ case PANEL_PROFILE_OLD:
+ /* 8 bits, 2*16, old keypad */
+ selected_keypad_type = KEYPAD_TYPE_OLD;
+ selected_lcd_type = LCD_TYPE_OLD;
+
+ /* TODO: This two are a little hacky, sort it out later */
+ if (lcd_width == NOT_SET)
+ lcd_width = 16;
+ if (lcd_hwidth == NOT_SET)
+ lcd_hwidth = 16;
+ break;
+ case PANEL_PROFILE_NEW:
+ /* serial, 2*16, new keypad */
+ selected_keypad_type = KEYPAD_TYPE_NEW;
+ selected_lcd_type = LCD_TYPE_KS0074;
+ break;
+ case PANEL_PROFILE_HANTRONIX:
+ /* 8 bits, 2*16 hantronix-like, no keypad */
+ selected_keypad_type = KEYPAD_TYPE_NONE;
+ selected_lcd_type = LCD_TYPE_HANTRONIX;
+ break;
+ case PANEL_PROFILE_NEXCOM:
+ /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
+ selected_keypad_type = KEYPAD_TYPE_NEXCOM;
+ selected_lcd_type = LCD_TYPE_NEXCOM;
+ break;
+ case PANEL_PROFILE_LARGE:
+ /* 8 bits, 2*40, old keypad */
+ selected_keypad_type = KEYPAD_TYPE_OLD;
+ selected_lcd_type = LCD_TYPE_OLD;
+ break;
+ }
+
+ /*
+ * Overwrite selection with module param values (both keypad and lcd),
+ * where the deprecated params have lower prio.
+ */
+ if (keypad_enabled != NOT_SET)
+ selected_keypad_type = keypad_enabled;
+ if (keypad_type != NOT_SET)
+ selected_keypad_type = keypad_type;
+
+ keypad.enabled = (selected_keypad_type > 0);
+
+ if (lcd_enabled != NOT_SET)
+ selected_lcd_type = lcd_enabled;
+ if (lcd_type != NOT_SET)
+ selected_lcd_type = lcd_type;
+
+ lcd.enabled = (selected_lcd_type > 0);
+
+ if (lcd.enabled) {
+ /*
+ * Init lcd struct with load-time values to preserve exact
+ * current functionality (at least for now).
+ */
+ lcd.charset = lcd_charset;
+ lcd.proto = lcd_proto;
+ lcd.pins.e = lcd_e_pin;
+ lcd.pins.rs = lcd_rs_pin;
+ lcd.pins.rw = lcd_rw_pin;
+ lcd.pins.cl = lcd_cl_pin;
+ lcd.pins.da = lcd_da_pin;
+ lcd.pins.bl = lcd_bl_pin;
+ }
+
+ switch (selected_keypad_type) {
+ case KEYPAD_TYPE_OLD:
+ keypad_profile = old_keypad_profile;
+ break;
+ case KEYPAD_TYPE_NEW:
+ keypad_profile = new_keypad_profile;
+ break;
+ case KEYPAD_TYPE_NEXCOM:
+ keypad_profile = nexcom_keypad_profile;
+ break;
+ default:
+ keypad_profile = NULL;
+ break;
+ }
+
+ if (!lcd.enabled && !keypad.enabled) {
+ /* no device enabled, let's exit */
+ pr_err("panel driver disabled.\n");
+ return -ENODEV;
+ }
+
+ err = parport_register_driver(&panel_driver);
+ if (err) {
+ pr_err("could not register with parport. Aborting.\n");
+ return err;
+ }
+
+ if (pprt)
+ pr_info("panel driver registered on parport%d (io=0x%lx).\n",
+ parport, pprt->port->base);
+ else
+ pr_info("panel driver not yet registered\n");
+ return 0;
+}
+
+static void __exit panel_cleanup_module(void)
+{
+ parport_unregister_driver(&panel_driver);
+}
+
+module_init(panel_init_module);
+module_exit(panel_cleanup_module);
+MODULE_AUTHOR("Willy Tarreau");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-indent-level: 4
+ * tab-width: 8
+ * End:
+ */