--- /dev/null
+/*
+ * Front panel driver for Linux
+ * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
+ *
+ * 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/notifier.h>
+#include <linux/reboot.h>
+#include <generated/utsrelease.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#define LCD_MINOR 156
+#define KEYPAD_MINOR 185
+
+#define PANEL_VERSION "0.9.5"
+
+#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)
+
+/* keep the light on this times INPUT_POLL_TIME for each flash */
+#define FLASH_LIGHT_TEMPO (200)
+
+/* 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 LCD_FLAG_S 0x0001
+#define LCD_FLAG_ID 0x0002
+#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 */
+
+#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;
+
+typedef __u64 pmask_t;
+
+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;
+ pmask_t mask;
+ pmask_t 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 (or pmask_t) 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 pmask_t phys_read;
+/* previous phys_read */
+static pmask_t phys_read_prev;
+/* stabilized phys_read (phys_read|phys_read_prev) */
+static pmask_t phys_curr;
+/* previous phys_curr */
+static pmask_t 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;
+ bool must_clear;
+
+ int height;
+ int width;
+ int bwidth;
+ int hwidth;
+ int charset;
+ int proto;
+ int light_tempo;
+
+ /* TODO: use union here? */
+ struct {
+ int e;
+ int rs;
+ int rw;
+ int cl;
+ int da;
+ int bl;
+ } pins;
+
+ /* 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;
+} 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 lcd_available = ATOMIC_INIT(1);
+static atomic_t keypad_available = ATOMIC_INIT(1);
+
+static struct pardevice *pprt;
+
+static int keypad_initialized;
+
+static void (*lcd_write_cmd)(int);
+static void (*lcd_write_data)(int);
+static void (*lcd_clear_fast)(void);
+
+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");
+
+
+static const unsigned char *lcd_char_conv;
+
+/* 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;
+
+/* FIXME: this should be converted to a bit array containing signals states */
+static struct {
+ unsigned char e; /* parallel LCD E (data latch on falling edge) */
+ unsigned char rs; /* parallel LCD RS (0 = cmd, 1 = data) */
+ unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */
+ unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */
+ unsigned char cl; /* serial LCD clock (latch on rising edge) */
+ unsigned char da; /* serial LCD data */
+} bits;
+
+static void init_scan_timer(void);
+
+/* sets data port bits according to current signals values */
+static int set_data_bits(void)
+{
+ int val, bit;
+
+ val = r_dtr(pprt);
+ for (bit = 0; bit < LCD_BITS; bit++)
+ val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK];
+
+ val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e]
+ | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs]
+ | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw]
+ | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl]
+ | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl]
+ | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da];
+
+ w_dtr(pprt, val);
+ return val;
+}
+
+/* sets ctrl port bits according to current signals values */
+static int set_ctrl_bits(void)
+{
+ int val, bit;
+
+ val = r_ctr(pprt);
+ for (bit = 0; bit < LCD_BITS; bit++)
+ val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK];
+
+ val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e]
+ | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs]
+ | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw]
+ | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl]
+ | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl]
+ | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da];
+
+ 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;
+ }
+}
+
+/* sleeps that many milliseconds with a reschedule */
+static void long_sleep(int ms)
+{
+ if (in_interrupt()) {
+ mdelay(ms);
+ } else {
+ __set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout((ms * HZ + 999) / 1000);
+ }
+}
+
+/* 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++) {
+ bits.cl = BIT_CLR; /* CLK low */
+ panel_set_bits();
+ bits.da = byte & 1;
+ panel_set_bits();
+ udelay(2); /* maintain the data during 2 us before CLK up */
+ bits.cl = BIT_SET; /* 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(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);
+ bits.bl = on;
+ panel_set_bits();
+ spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the LCD panel in serial mode */
+static void lcd_write_cmd_s(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(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(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 */
+
+ bits.e = BIT_SET;
+ bits.rs = BIT_CLR;
+ bits.rw = BIT_CLR;
+ set_ctrl_bits();
+
+ udelay(40); /* maintain the strobe during 40 us */
+
+ bits.e = BIT_CLR;
+ 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(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 */
+
+ bits.e = BIT_SET;
+ bits.rs = BIT_SET;
+ bits.rw = BIT_CLR;
+ set_ctrl_bits();
+
+ udelay(40); /* maintain the strobe during 40 us */
+
+ bits.e = BIT_CLR;
+ 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(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(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);
+}
+
+static void lcd_gotoxy(void)
+{
+ lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR
+ | (lcd.addr.y ? lcd.hwidth : 0)
+ /* we force the cursor to stay at the end of the
+ line if it wants to go farther */
+ | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x &
+ (lcd.hwidth - 1) : lcd.bwidth - 1));
+}
+
+static void lcd_print(char c)
+{
+ if (lcd.addr.x < lcd.bwidth) {
+ if (lcd_char_conv != NULL)
+ c = lcd_char_conv[(unsigned char)c];
+ lcd_write_data(c);
+ lcd.addr.x++;
+ }
+ /* prevents the cursor from wrapping onto the next line */
+ if (lcd.addr.x == lcd.bwidth)
+ lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_s(void)
+{
+ int pos;
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+ lcd_send_serial(0x5F); /* R/W=W, RS=1 */
+ lcd_send_serial(' ' & 0x0F);
+ lcd_send_serial((' ' >> 4) & 0x0F);
+ udelay(40); /* the shortest data takes at least 40 us */
+ }
+ spin_unlock_irq(&pprt_lock);
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_p8(void)
+{
+ int pos;
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+ /* present the data to the data port */
+ w_dtr(pprt, ' ');
+
+ /* maintain the data during 20 us before the strobe */
+ udelay(20);
+
+ bits.e = BIT_SET;
+ bits.rs = BIT_SET;
+ bits.rw = BIT_CLR;
+ set_ctrl_bits();
+
+ /* maintain the strobe during 40 us */
+ udelay(40);
+
+ bits.e = BIT_CLR;
+ set_ctrl_bits();
+
+ /* the shortest data takes at least 45 us */
+ udelay(45);
+ }
+ spin_unlock_irq(&pprt_lock);
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_tilcd(void)
+{
+ int pos;
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+
+ spin_lock_irq(&pprt_lock);
+ for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+ /* present the data to the data port */
+ w_dtr(pprt, ' ');
+ udelay(60);
+ }
+
+ spin_unlock_irq(&pprt_lock);
+
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+}
+
+/* clears the display and resets X/Y */
+static void lcd_clear_display(void)
+{
+ lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR);
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ /* we must wait a few milliseconds (15) */
+ long_sleep(15);
+}
+
+static void lcd_init_display(void)
+{
+ lcd.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 */
+
+ /* 8bits, 1 line, small fonts; let's do it 3 times */
+ lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+ long_sleep(10);
+ lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+ long_sleep(10);
+ lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+ long_sleep(10);
+
+ /* set font height and lines number */
+ lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS
+ | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0)
+ | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0)
+ );
+ long_sleep(10);
+
+ /* display off, cursor off, blink off */
+ lcd_write_cmd(LCD_CMD_DISPLAY_CTRL);
+ long_sleep(10);
+
+ lcd_write_cmd(LCD_CMD_DISPLAY_CTRL /* set display mode */
+ | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0)
+ | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0)
+ | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0)
+ );
+
+ lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0);
+
+ long_sleep(10);
+
+ /* entry mode set : increment, cursor shifting */
+ lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC);
+
+ lcd_clear_display();
+}
+
+/*
+ * 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(void)
+{
+ /* LCD special codes */
+
+ int processed = 0;
+
+ char *esc = lcd.esc_seq.buf + 2;
+ int oldflags = lcd.flags;
+
+ /* check for display mode flags */
+ switch (*esc) {
+ case 'D': /* Display ON */
+ lcd.flags |= LCD_FLAG_D;
+ processed = 1;
+ break;
+ case 'd': /* Display OFF */
+ lcd.flags &= ~LCD_FLAG_D;
+ processed = 1;
+ break;
+ case 'C': /* Cursor ON */
+ lcd.flags |= LCD_FLAG_C;
+ processed = 1;
+ break;
+ case 'c': /* Cursor OFF */
+ lcd.flags &= ~LCD_FLAG_C;
+ processed = 1;
+ break;
+ case 'B': /* Blink ON */
+ lcd.flags |= LCD_FLAG_B;
+ processed = 1;
+ break;
+ case 'b': /* Blink OFF */
+ lcd.flags &= ~LCD_FLAG_B;
+ processed = 1;
+ break;
+ case '+': /* Back light ON */
+ lcd.flags |= LCD_FLAG_L;
+ processed = 1;
+ break;
+ case '-': /* Back light OFF */
+ lcd.flags &= ~LCD_FLAG_L;
+ processed = 1;
+ break;
+ case '*':
+ /* flash back light using the keypad timer */
+ if (scan_timer.function != NULL) {
+ if (lcd.light_tempo == 0
+ && ((lcd.flags & LCD_FLAG_L) == 0))
+ lcd_backlight(1);
+ lcd.light_tempo = FLASH_LIGHT_TEMPO;
+ }
+ processed = 1;
+ break;
+ case 'f': /* Small Font */
+ lcd.flags &= ~LCD_FLAG_F;
+ processed = 1;
+ break;
+ case 'F': /* Large Font */
+ lcd.flags |= LCD_FLAG_F;
+ processed = 1;
+ break;
+ case 'n': /* One Line */
+ lcd.flags &= ~LCD_FLAG_N;
+ processed = 1;
+ break;
+ case 'N': /* Two Lines */
+ lcd.flags |= LCD_FLAG_N;
+ break;
+ case 'l': /* Shift Cursor Left */
+ if (lcd.addr.x > 0) {
+ /* back one char if not at end of line */
+ if (lcd.addr.x < lcd.bwidth)
+ lcd_write_cmd(LCD_CMD_SHIFT);
+ lcd.addr.x--;
+ }
+ processed = 1;
+ break;
+ case 'r': /* shift cursor right */
+ if (lcd.addr.x < lcd.width) {
+ /* allow the cursor to pass the end of the line */
+ if (lcd.addr.x < (lcd.bwidth - 1))
+ lcd_write_cmd(LCD_CMD_SHIFT |
+ LCD_CMD_SHIFT_RIGHT);
+ lcd.addr.x++;
+ }
+ processed = 1;
+ break;
+ case 'L': /* shift display left */
+ lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT);
+ processed = 1;
+ break;
+ case 'R': /* shift display right */
+ lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT |
+ LCD_CMD_SHIFT_RIGHT);
+ processed = 1;
+ break;
+ case 'k': { /* kill end of line */
+ int x;
+
+ for (x = lcd.addr.x; x < lcd.bwidth; x++)
+ lcd_write_data(' ');
+
+ /* restore cursor position */
+ lcd_gotoxy();
+ processed = 1;
+ break;
+ }
+ case 'I': /* reinitialize display */
+ lcd_init_display();
+ 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, ';') == NULL)
+ 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_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8));
+ for (addr = 0; addr < cgoffset; addr++)
+ lcd_write_data(cgbytes[addr]);
+
+ /* ensures that we stop writing to CGRAM */
+ lcd_gotoxy();
+ processed = 1;
+ break;
+ }
+ case 'x': /* gotoxy : LxXXX[yYYY]; */
+ case 'y': /* gotoxy : LyYYY[xXXX]; */
+ if (strchr(esc, ';') == NULL)
+ break;
+
+ while (*esc) {
+ if (*esc == 'x') {
+ esc++;
+ if (kstrtoul(esc, 10, &lcd.addr.x) < 0)
+ break;
+ } else if (*esc == 'y') {
+ esc++;
+ if (kstrtoul(esc, 10, &lcd.addr.y) < 0)
+ break;
+ } else {
+ break;
+ }
+ }
+
+ lcd_gotoxy();
+ processed = 1;
+ break;
+ }
+
+ /* TODO: This indent party here got ugly, clean it! */
+ /* Check whether one flag was changed */
+ if (oldflags != lcd.flags) {
+ /* check whether one of B,C,D flags were changed */
+ if ((oldflags ^ lcd.flags) &
+ (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D))
+ /* set display mode */
+ lcd_write_cmd(LCD_CMD_DISPLAY_CTRL
+ | ((lcd.flags & LCD_FLAG_D)
+ ? LCD_CMD_DISPLAY_ON : 0)
+ | ((lcd.flags & LCD_FLAG_C)
+ ? LCD_CMD_CURSOR_ON : 0)
+ | ((lcd.flags & LCD_FLAG_B)
+ ? LCD_CMD_BLINK_ON : 0));
+ /* check whether one of F,N flags was changed */
+ else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N))
+ lcd_write_cmd(LCD_CMD_FUNCTION_SET
+ | LCD_CMD_DATA_LEN_8BITS
+ | ((lcd.flags & LCD_FLAG_F)
+ ? LCD_CMD_TWO_LINES : 0)
+ | ((lcd.flags & LCD_FLAG_N)
+ ? LCD_CMD_FONT_5X10_DOTS
+ : 0));
+ /* check whether L flag was changed */
+ else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) {
+ if (lcd.flags & (LCD_FLAG_L))
+ lcd_backlight(1);
+ else if (lcd.light_tempo == 0)
+ /* switch off the light only when the tempo
+ lighting is gone */
+ lcd_backlight(0);
+ }
+ }
+
+ return processed;
+}
+
+static void lcd_write_char(char c)
+{
+ /* first, we'll test if we're in escape mode */
+ if ((c != '\n') && lcd.esc_seq.len >= 0) {
+ /* yes, let's add this char to the buffer */
+ lcd.esc_seq.buf[lcd.esc_seq.len++] = c;
+ lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
+ } else {
+ /* aborts any previous escape sequence */
+ lcd.esc_seq.len = -1;
+
+ switch (c) {
+ case LCD_ESCAPE_CHAR:
+ /* start of an escape sequence */
+ lcd.esc_seq.len = 0;
+ lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
+ break;
+ case '\b':
+ /* go back one char and clear it */
+ if (lcd.addr.x > 0) {
+ /* check if we're not at the
+ end of the line */
+ if (lcd.addr.x < lcd.bwidth)
+ /* back one char */
+ lcd_write_cmd(LCD_CMD_SHIFT);
+ lcd.addr.x--;
+ }
+ /* replace with a space */
+ lcd_write_data(' ');
+ /* back one char again */
+ lcd_write_cmd(LCD_CMD_SHIFT);
+ break;
+ case '\014':
+ /* quickly clear the display */
+ lcd_clear_fast();
+ break;
+ case '\n':
+ /* flush the remainder of the current line and
+ go to the beginning of the next line */
+ for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++)
+ lcd_write_data(' ');
+ lcd.addr.x = 0;
+ lcd.addr.y = (lcd.addr.y + 1) % lcd.height;
+ lcd_gotoxy();
+ break;
+ case '\r':
+ /* go to the beginning of the same line */
+ lcd.addr.x = 0;
+ lcd_gotoxy();
+ break;
+ case '\t':
+ /* print a space instead of the tab */
+ lcd_print(' ');
+ break;
+ default:
+ /* simply print this char */
+ lcd_print(c);
+ break;
+ }
+ }
+
+ /* now we'll see if we're in an escape mode and if the current
+ escape sequence can be understood. */
+ if (lcd.esc_seq.len >= 2) {
+ int processed = 0;
+
+ if (!strcmp(lcd.esc_seq.buf, "[2J")) {
+ /* clear the display */
+ lcd_clear_fast();
+ processed = 1;
+ } else if (!strcmp(lcd.esc_seq.buf, "[H")) {
+ /* cursor to home */
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ lcd_gotoxy();
+ processed = 1;
+ }
+ /* codes starting with ^[[L */
+ else if ((lcd.esc_seq.len >= 3) &&
+ (lcd.esc_seq.buf[0] == '[') &&
+ (lcd.esc_seq.buf[1] == 'L')) {
+ processed = handle_lcd_special_code();
+ }
+
+ /* LCD special escape codes */
+ /* flush the escape sequence if it's been processed
+ or if it is getting too long. */
+ if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN))
+ lcd.esc_seq.len = -1;
+ } /* escape codes */
+}
+
+static ssize_t lcd_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;
+
+ lcd_write_char(c);
+ }
+
+ return tmp - buf;
+}
+
+static int lcd_open(struct inode *inode, struct file *file)
+{
+ if (!atomic_dec_and_test(&lcd_available))
+ return -EBUSY; /* open only once at a time */
+
+ if (file->f_mode & FMODE_READ) /* device is write-only */
+ return -EPERM;
+
+ if (lcd.must_clear) {
+ lcd_clear_display();
+ lcd.must_clear = false;
+ }
+ return nonseekable_open(inode, file);
+}
+
+static int lcd_release(struct inode *inode, struct file *file)
+{
+ atomic_inc(&lcd_available);
+ return 0;
+}
+
+static const struct file_operations lcd_fops = {
+ .write = lcd_write,
+ .open = lcd_open,
+ .release = lcd_release,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice lcd_dev = {
+ .minor = LCD_MINOR,
+ .name = "lcd",
+ .fops = &lcd_fops,
+};
+
+/* public function usable from the kernel for any purpose */
+static void panel_lcd_print(const char *s)
+{
+ const char *tmp = s;
+ int count = strlen(s);
+
+ if (lcd.enabled && lcd.initialized) {
+ 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();
+
+ lcd_write_char(*tmp);
+ }
+ }
+}
+
+/* initialize the LCD driver */
+static void lcd_init(void)
+{
+ 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;
+
+ lcd.width = 40;
+ lcd.bwidth = 40;
+ lcd.hwidth = 64;
+ lcd.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;
+
+ lcd.width = 16;
+ lcd.bwidth = 40;
+ lcd.hwidth = 16;
+ lcd.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;
+
+ lcd.width = 16;
+ lcd.bwidth = 40;
+ lcd.hwidth = 64;
+ lcd.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;
+
+ lcd.width = 16;
+ lcd.bwidth = 40;
+ lcd.hwidth = 64;
+ lcd.height = 2;
+ break;
+ }
+
+ /* Overwrite with module params set on loading */
+ if (lcd_height != NOT_SET)
+ lcd.height = lcd_height;
+ if (lcd_width != NOT_SET)
+ lcd.width = lcd_width;
+ if (lcd_bwidth != NOT_SET)
+ lcd.bwidth = lcd_bwidth;
+ if (lcd_hwidth != NOT_SET)
+ lcd.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 (lcd.width <= 0)
+ lcd.width = DEFAULT_LCD_WIDTH;
+ if (lcd.bwidth <= 0)
+ lcd.bwidth = DEFAULT_LCD_BWIDTH;
+ if (lcd.hwidth <= 0)
+ lcd.hwidth = DEFAULT_LCD_HWIDTH;
+ if (lcd.height <= 0)
+ lcd.height = DEFAULT_LCD_HEIGHT;
+
+ if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */
+ lcd_write_cmd = lcd_write_cmd_s;
+ lcd_write_data = lcd_write_data_s;
+ lcd_clear_fast = lcd_clear_fast_s;
+
+ 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 */
+ lcd_write_cmd = lcd_write_cmd_p8;
+ lcd_write_data = lcd_write_data_p8;
+ lcd_clear_fast = lcd_clear_fast_p8;
+
+ 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 {
+ lcd_write_cmd = lcd_write_cmd_tilcd;
+ lcd_write_data = lcd_write_data_tilcd;
+ lcd_clear_fast = lcd_clear_fast_tilcd;
+ }
+
+ 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)
+ lcd_char_conv = lcd_char_conv_ks0074;
+ else
+ lcd_char_conv = NULL;
+
+ if (lcd.pins.bl != PIN_NONE)
+ init_scan_timer();
+
+ 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]);
+
+ /* before this line, we must NOT send anything to the display.
+ * Since lcd_init_display() needs to write data, we have to
+ * enable mark the LCD initialized just before. */
+ lcd.initialized = true;
+ lcd_init_display();
+
+ /* display a short message */
+#ifdef CONFIG_PANEL_CHANGE_MESSAGE
+#ifdef CONFIG_PANEL_BOOT_MESSAGE
+ panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);
+#endif
+#else
+ panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-"
+ PANEL_VERSION);
+#endif
+ lcd.addr.x = 0;
+ lcd.addr.y = 0;
+ /* clear the display on the next device opening */
+ lcd.must_clear = true;
+ lcd_gotoxy();
+}
+
+/*
+ * 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)
+{
+ if (!atomic_dec_and_test(&keypad_available))
+ return -EBUSY; /* open only once at a time */
+
+ if (file->f_mode & FMODE_WRITE) /* device is read-only */
+ return -EPERM;
+
+ keypad_buflen = 0; /* flush the buffer on opening */
+ return 0;
+}
+
+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 |= (pmask_t) 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 = 1 << 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 |= (pmask_t) 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 != NULL)
+ 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 != NULL)
+ 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 list_head *item;
+ struct logical_input *input;
+
+ keypressed = 0;
+ inputs_stable = 1;
+ list_for_each(item, &logical_inputs) {
+ input = list_entry(item, struct logical_input, 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 (lcd.enabled && lcd.initialized) {
+ if (keypressed) {
+ if (lcd.light_tempo == 0
+ && ((lcd.flags & LCD_FLAG_L) == 0))
+ lcd_backlight(1);
+ lcd.light_tempo = FLASH_LIGHT_TEMPO;
+ } else if (lcd.light_tempo > 0) {
+ lcd.light_tempo--;
+ if (lcd.light_tempo == 0
+ && ((lcd.flags & LCD_FLAG_L) == 0))
+ lcd_backlight(0);
+ }
+ }
+
+ mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME);
+}
+
+static void init_scan_timer(void)
+{
+ if (scan_timer.function != NULL)
+ 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 int input_name2mask(const char *name, pmask_t *mask, pmask_t *value,
+ char *imask, char *omask)
+{
+ static char sigtab[10] = "EeSsPpAaBb";
+ char im, om;
+ pmask_t m, v;
+
+ om = 0ULL;
+ im = 0ULL;
+ m = 0ULL;
+ v = 0ULL;
+ while (*name) {
+ int in, out, bit, neg;
+
+ for (in = 0; (in < sizeof(sigtab)) && (sigtab[in] != *name);
+ in++)
+ ;
+
+ if (in >= sizeof(sigtab))
+ return 0; /* input name not found */
+ neg = (in & 1); /* odd (lower) names are negated */
+ in >>= 1;
+ im |= (1 << in);
+
+ name++;
+ if (isdigit(*name)) {
+ out = *name - '0';
+ om |= (1 << 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 int panel_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (lcd.enabled && lcd.initialized) {
+ switch (code) {
+ case SYS_DOWN:
+ panel_lcd_print
+ ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
+ break;
+ case SYS_HALT:
+ panel_lcd_print
+ ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
+ break;
+ case SYS_POWER_OFF:
+ panel_lcd_print("\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
+};
+
+static void panel_attach(struct parport *port)
+{
+ if (port->number != parport)
+ return;
+
+ if (pprt) {
+ pr_err("%s: port->number=%d parport=%d, already registered!\n",
+ __func__, port->number, parport);
+ return;
+ }
+
+ pprt = parport_register_device(port, "panel", NULL, NULL, /* pf, kf */
+ NULL,
+ /*PARPORT_DEV_EXCL */
+ 0, (void *)&pprt);
+ if (pprt == NULL) {
+ 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 (misc_register(&lcd_dev))
+ goto err_unreg_device;
+ }
+
+ if (keypad.enabled) {
+ keypad_init();
+ if (misc_register(&keypad_dev))
+ goto err_lcd_unreg;
+ }
+ register_reboot_notifier(&panel_notifier);
+ return;
+
+err_lcd_unreg:
+ if (lcd.enabled)
+ misc_deregister(&lcd_dev);
+err_unreg_device:
+ 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;
+ }
+
+ unregister_reboot_notifier(&panel_notifier);
+
+ if (keypad.enabled && keypad_initialized) {
+ misc_deregister(&keypad_dev);
+ keypad_initialized = 0;
+ }
+
+ if (lcd.enabled && lcd.initialized) {
+ misc_deregister(&lcd_dev);
+ lcd.initialized = false;
+ }
+
+ parport_release(pprt);
+ parport_unregister_device(pprt);
+ pprt = NULL;
+}
+
+static struct parport_driver panel_driver = {
+ .name = "panel",
+ .attach = panel_attach,
+ .detach = panel_detach,
+};
+
+/* 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.height = lcd_height;
+ lcd.width = lcd_width;
+ lcd.bwidth = lcd_bwidth;
+ lcd.hwidth = lcd_hwidth;
+ 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;
+
+ /* Leave it for now, just in case */
+ lcd.esc_seq.len = -1;
+ }
+
+ 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("driver version " PANEL_VERSION " 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("driver version " PANEL_VERSION
+ " registered on parport%d (io=0x%lx).\n", parport,
+ pprt->port->base);
+ else
+ pr_info("driver version " PANEL_VERSION
+ " not yet registered\n");
+ return 0;
+}
+
+static void __exit panel_cleanup_module(void)
+{
+
+ if (scan_timer.function != NULL)
+ del_timer_sync(&scan_timer);
+
+ if (pprt != NULL) {
+ if (keypad.enabled) {
+ misc_deregister(&keypad_dev);
+ keypad_initialized = 0;
+ }
+
+ if (lcd.enabled) {
+ panel_lcd_print("\x0cLCD driver " PANEL_VERSION
+ "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
+ misc_deregister(&lcd_dev);
+ lcd.initialized = false;
+ }
+
+ /* TODO: free all input signals */
+ parport_release(pprt);
+ parport_unregister_device(pprt);
+ pprt = NULL;
+ }
+ 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:
+ */
Code Review / kvmfornfv.git / blobdiff