diff options
Diffstat (limited to 'drivers/misc/panel.c')
| -rw-r--r-- | drivers/misc/panel.c | 2438 |
1 files changed, 2438 insertions, 0 deletions
diff --git a/drivers/misc/panel.c b/drivers/misc/panel.c new file mode 100644 index 000000000000..6030ac5b8c63 --- /dev/null +++ b/drivers/misc/panel.c @@ -0,0 +1,2438 @@ +/* + * 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; + +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; + 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; + +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]; + } +} + +static void init_scan_timer(void); + +/* 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; + } +} + +/* 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)); +} + +/* + * 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(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(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 */ + + 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(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(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) + 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); + /* the shortest data takes at least 40 us */ + udelay(40); + } + 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); + + 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); + + 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) { + 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': { |