| /* |
| * Front panel driver for Linux |
| * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> |
| * Copyright (C) 2016-2017 Glider bvba |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad) |
| * connected to a parallel printer port. |
| * |
| * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit |
| * serial module compatible with Samsung's KS0074. The pins may be connected in |
| * any combination, everything is programmable. |
| * |
| * The keypad consists in a matrix of push buttons connecting input pins to |
| * data output pins or to the ground. The combinations have to be hard-coded |
| * in the driver, though several profiles exist and adding new ones is easy. |
| * |
| * Several profiles are provided for commonly found LCD+keypad modules on the |
| * market, such as those found in Nexcom's appliances. |
| * |
| * FIXME: |
| * - the initialization/deinitialization process is very dirty and should |
| * be rewritten. It may even be buggy. |
| * |
| * TODO: |
| * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs) |
| * - make the LCD a part of a virtual screen of Vx*Vy |
| * - make the inputs list smp-safe |
| * - change the keyboard to a double mapping : signals -> key_id -> values |
| * so that applications can change values without knowing signals |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/module.h> |
| |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/miscdevice.h> |
| #include <linux/slab.h> |
| #include <linux/ioport.h> |
| #include <linux/fcntl.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/kernel.h> |
| #include <linux/ctype.h> |
| #include <linux/parport.h> |
| #include <linux/list.h> |
| |
| #include <linux/io.h> |
| #include <linux/uaccess.h> |
| |
| #include <misc/charlcd.h> |
| |
| #define KEYPAD_MINOR 185 |
| |
| #define LCD_MAXBYTES 256 /* max burst write */ |
| |
| #define KEYPAD_BUFFER 64 |
| |
| /* poll the keyboard this every second */ |
| #define INPUT_POLL_TIME (HZ / 50) |
| /* a key starts to repeat after this times INPUT_POLL_TIME */ |
| #define KEYPAD_REP_START (10) |
| /* a key repeats this times INPUT_POLL_TIME */ |
| #define KEYPAD_REP_DELAY (2) |
| |
| /* converts an r_str() input to an active high, bits string : 000BAOSE */ |
| #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) |
| |
| #define PNL_PBUSY 0x80 /* inverted input, active low */ |
| #define PNL_PACK 0x40 /* direct input, active low */ |
| #define PNL_POUTPA 0x20 /* direct input, active high */ |
| #define PNL_PSELECD 0x10 /* direct input, active high */ |
| #define PNL_PERRORP 0x08 /* direct input, active low */ |
| |
| #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
| /* high to read data in or-ed with data out */ |
| #define PNL_PINTEN 0x10 |
| #define PNL_PSELECP 0x08 /* inverted output, active low */ |
| #define PNL_PINITP 0x04 /* direct output, active low */ |
| #define PNL_PAUTOLF 0x02 /* inverted output, active low */ |
| #define PNL_PSTROBE 0x01 /* inverted output */ |
| |
| #define PNL_PD0 0x01 |
| #define PNL_PD1 0x02 |
| #define PNL_PD2 0x04 |
| #define PNL_PD3 0x08 |
| #define PNL_PD4 0x10 |
| #define PNL_PD5 0x20 |
| #define PNL_PD6 0x40 |
| #define PNL_PD7 0x80 |
| |
| #define PIN_NONE 0 |
| #define PIN_STROBE 1 |
| #define PIN_D0 2 |
| #define PIN_D1 3 |
| #define PIN_D2 4 |
| #define PIN_D3 5 |
| #define PIN_D4 6 |
| #define PIN_D5 7 |
| #define PIN_D6 8 |
| #define PIN_D7 9 |
| #define PIN_AUTOLF 14 |
| #define PIN_INITP 16 |
| #define PIN_SELECP 17 |
| #define PIN_NOT_SET 127 |
| |
| #define NOT_SET -1 |
| |
| /* macros to simplify use of the parallel port */ |
| #define r_ctr(x) (parport_read_control((x)->port)) |
| #define r_dtr(x) (parport_read_data((x)->port)) |
| #define r_str(x) (parport_read_status((x)->port)) |
| #define w_ctr(x, y) (parport_write_control((x)->port, (y))) |
| #define w_dtr(x, y) (parport_write_data((x)->port, (y))) |
| |
| /* this defines which bits are to be used and which ones to be ignored */ |
| /* logical or of the output bits involved in the scan matrix */ |
| static __u8 scan_mask_o; |
| /* logical or of the input bits involved in the scan matrix */ |
| static __u8 scan_mask_i; |
| |
| enum input_type { |
| INPUT_TYPE_STD, |
| INPUT_TYPE_KBD, |
| }; |
| |
| enum input_state { |
| INPUT_ST_LOW, |
| INPUT_ST_RISING, |
| INPUT_ST_HIGH, |
| INPUT_ST_FALLING, |
| }; |
| |
| struct logical_input { |
| struct list_head list; |
| __u64 mask; |
| __u64 value; |
| enum input_type type; |
| enum input_state state; |
| __u8 rise_time, fall_time; |
| __u8 rise_timer, fall_timer, high_timer; |
| |
| union { |
| struct { /* valid when type == INPUT_TYPE_STD */ |
| void (*press_fct)(int); |
| void (*release_fct)(int); |
| int press_data; |
| int release_data; |
| } std; |
| struct { /* valid when type == INPUT_TYPE_KBD */ |
| /* strings can be non null-terminated */ |
| char press_str[sizeof(void *) + sizeof(int)]; |
| char repeat_str[sizeof(void *) + sizeof(int)]; |
| char release_str[sizeof(void *) + sizeof(int)]; |
| } kbd; |
| } u; |
| }; |
| |
| static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
| |
| /* physical contacts history |
| * Physical contacts are a 45 bits string of 9 groups of 5 bits each. |
| * The 8 lower groups correspond to output bits 0 to 7, and the 9th group |
| * corresponds to the ground. |
| * Within each group, bits are stored in the same order as read on the port : |
| * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). |
| * So, each __u64 is represented like this : |
| * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE |
| * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> |
| */ |
| |
| /* what has just been read from the I/O ports */ |
| static __u64 phys_read; |
| /* previous phys_read */ |
| static __u64 phys_read_prev; |
| /* stabilized phys_read (phys_read|phys_read_prev) */ |
| static __u64 phys_curr; |
| /* previous phys_curr */ |
| static __u64 phys_prev; |
| /* 0 means that at least one logical signal needs be computed */ |
| static char inputs_stable; |
| |
| /* these variables are specific to the keypad */ |
| static struct { |
| bool enabled; |
| } keypad; |
| |
| static char keypad_buffer[KEYPAD_BUFFER]; |
| static int keypad_buflen; |
| static int keypad_start; |
| static char keypressed; |
| static wait_queue_head_t keypad_read_wait; |
| |
| /* lcd-specific variables */ |
| static struct { |
| bool enabled; |
| bool initialized; |
| |
| int charset; |
| int proto; |
| |
| /* TODO: use union here? */ |
| struct { |
| int e; |
| int rs; |
| int rw; |
| int cl; |
| int da; |
| int bl; |
| } pins; |
| |
| struct charlcd *charlcd; |
| } lcd; |
| |
| /* Needed only for init */ |
| static int selected_lcd_type = NOT_SET; |
| |
| /* |
| * Bit masks to convert LCD signals to parallel port outputs. |
| * _d_ are values for data port, _c_ are for control port. |
| * [0] = signal OFF, [1] = signal ON, [2] = mask |
| */ |
| #define BIT_CLR 0 |
| #define BIT_SET 1 |
| #define BIT_MSK 2 |
| #define BIT_STATES 3 |
| /* |
| * one entry for each bit on the LCD |
| */ |
| #define LCD_BIT_E 0 |
| #define LCD_BIT_RS 1 |
| #define LCD_BIT_RW 2 |
| #define LCD_BIT_BL 3 |
| #define LCD_BIT_CL 4 |
| #define LCD_BIT_DA 5 |
| #define LCD_BITS 6 |
| |
| /* |
| * each bit can be either connected to a DATA or CTRL port |
| */ |
| #define LCD_PORT_C 0 |
| #define LCD_PORT_D 1 |
| #define LCD_PORTS 2 |
| |
| static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; |
| |
| /* |
| * LCD protocols |
| */ |
| #define LCD_PROTO_PARALLEL 0 |
| #define LCD_PROTO_SERIAL 1 |
| #define LCD_PROTO_TI_DA8XX_LCD 2 |
| |
| /* |
| * LCD character sets |
| */ |
| #define LCD_CHARSET_NORMAL 0 |
| #define LCD_CHARSET_KS0074 1 |
| |
| /* |
| * LCD types |
| */ |
| #define LCD_TYPE_NONE 0 |
| #define LCD_TYPE_CUSTOM 1 |
| #define LCD_TYPE_OLD 2 |
| #define LCD_TYPE_KS0074 3 |
| #define LCD_TYPE_HANTRONIX 4 |
| #define LCD_TYPE_NEXCOM 5 |
| |
| /* |
| * keypad types |
| */ |
| #define KEYPAD_TYPE_NONE 0 |
| #define KEYPAD_TYPE_OLD 1 |
| #define KEYPAD_TYPE_NEW 2 |
| #define KEYPAD_TYPE_NEXCOM 3 |
| |
| /* |
| * panel profiles |
| */ |
| #define PANEL_PROFILE_CUSTOM 0 |
| #define PANEL_PROFILE_OLD 1 |
| #define PANEL_PROFILE_NEW 2 |
| #define PANEL_PROFILE_HANTRONIX 3 |
| #define PANEL_PROFILE_NEXCOM 4 |
| #define PANEL_PROFILE_LARGE 5 |
| |
| /* |
| * Construct custom config from the kernel's configuration |
| */ |
| #define DEFAULT_PARPORT 0 |
| #define DEFAULT_PROFILE PANEL_PROFILE_LARGE |
| #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD |
| #define DEFAULT_LCD_TYPE LCD_TYPE_OLD |
| #define DEFAULT_LCD_HEIGHT 2 |
| #define DEFAULT_LCD_WIDTH 40 |
| #define DEFAULT_LCD_BWIDTH 40 |
| #define DEFAULT_LCD_HWIDTH 64 |
| #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL |
| #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL |
| |
| #define DEFAULT_LCD_PIN_E PIN_AUTOLF |
| #define DEFAULT_LCD_PIN_RS PIN_SELECP |
| #define DEFAULT_LCD_PIN_RW PIN_INITP |
| #define DEFAULT_LCD_PIN_SCL PIN_STROBE |
| #define DEFAULT_LCD_PIN_SDA PIN_D0 |
| #define DEFAULT_LCD_PIN_BL PIN_NOT_SET |
| |
| #ifdef CONFIG_PANEL_PARPORT |
| #undef DEFAULT_PARPORT |
| #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT |
| #endif |
| |
| #ifdef CONFIG_PANEL_PROFILE |
| #undef DEFAULT_PROFILE |
| #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE |
| #endif |
| |
| #if DEFAULT_PROFILE == 0 /* custom */ |
| #ifdef CONFIG_PANEL_KEYPAD |
| #undef DEFAULT_KEYPAD_TYPE |
| #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD |
| #undef DEFAULT_LCD_TYPE |
| #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_HEIGHT |
| #undef DEFAULT_LCD_HEIGHT |
| #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_WIDTH |
| #undef DEFAULT_LCD_WIDTH |
| #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_BWIDTH |
| #undef DEFAULT_LCD_BWIDTH |
| #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_HWIDTH |
| #undef DEFAULT_LCD_HWIDTH |
| #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_CHARSET |
| #undef DEFAULT_LCD_CHARSET |
| #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PROTO |
| #undef DEFAULT_LCD_PROTO |
| #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_E |
| #undef DEFAULT_LCD_PIN_E |
| #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_RS |
| #undef DEFAULT_LCD_PIN_RS |
| #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_RW |
| #undef DEFAULT_LCD_PIN_RW |
| #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_SCL |
| #undef DEFAULT_LCD_PIN_SCL |
| #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_SDA |
| #undef DEFAULT_LCD_PIN_SDA |
| #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA |
| #endif |
| |
| #ifdef CONFIG_PANEL_LCD_PIN_BL |
| #undef DEFAULT_LCD_PIN_BL |
| #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL |
| #endif |
| |
| #endif /* DEFAULT_PROFILE == 0 */ |
| |
| /* global variables */ |
| |
| /* Device single-open policy control */ |
| static atomic_t keypad_available = ATOMIC_INIT(1); |
| |
| static struct pardevice *pprt; |
| |
| static int keypad_initialized; |
| |
| static DEFINE_SPINLOCK(pprt_lock); |
| static struct timer_list scan_timer; |
| |
| MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
| |
| static int parport = DEFAULT_PARPORT; |
| module_param(parport, int, 0000); |
| MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); |
| |
| static int profile = DEFAULT_PROFILE; |
| module_param(profile, int, 0000); |
| MODULE_PARM_DESC(profile, |
| "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; " |
| "4=16x2 nexcom; default=40x2, old kp"); |
| |
| static int keypad_type = NOT_SET; |
| module_param(keypad_type, int, 0000); |
| MODULE_PARM_DESC(keypad_type, |
| "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys"); |
| |
| static int lcd_type = NOT_SET; |
| module_param(lcd_type, int, 0000); |
| MODULE_PARM_DESC(lcd_type, |
| "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom"); |
| |
| static int lcd_height = NOT_SET; |
| module_param(lcd_height, int, 0000); |
| MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); |
| |
| static int lcd_width = NOT_SET; |
| module_param(lcd_width, int, 0000); |
| MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); |
| |
| static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */ |
| module_param(lcd_bwidth, int, 0000); |
| MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); |
| |
| static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */ |
| module_param(lcd_hwidth, int, 0000); |
| MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); |
| |
| static int lcd_charset = NOT_SET; |
| module_param(lcd_charset, int, 0000); |
| MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); |
| |
| static int lcd_proto = NOT_SET; |
| module_param(lcd_proto, int, 0000); |
| MODULE_PARM_DESC(lcd_proto, |
| "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface"); |
| |
| /* |
| * These are the parallel port pins the LCD control signals are connected to. |
| * Set this to 0 if the signal is not used. Set it to its opposite value |
| * (negative) if the signal is negated. -MAXINT is used to indicate that the |
| * pin has not been explicitly specified. |
| * |
| * WARNING! no check will be performed about collisions with keypad ! |
| */ |
| |
| static int lcd_e_pin = PIN_NOT_SET; |
| module_param(lcd_e_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_e_pin, |
| "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)"); |
| |
| static int lcd_rs_pin = PIN_NOT_SET; |
| module_param(lcd_rs_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_rs_pin, |
| "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)"); |
| |
| static int lcd_rw_pin = PIN_NOT_SET; |
| module_param(lcd_rw_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_rw_pin, |
| "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)"); |
| |
| static int lcd_cl_pin = PIN_NOT_SET; |
| module_param(lcd_cl_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_cl_pin, |
| "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)"); |
| |
| static int lcd_da_pin = PIN_NOT_SET; |
| module_param(lcd_da_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_da_pin, |
| "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)"); |
| |
| static int lcd_bl_pin = PIN_NOT_SET; |
| module_param(lcd_bl_pin, int, 0000); |
| MODULE_PARM_DESC(lcd_bl_pin, |
| "# of the // port pin connected to LCD backlight, with polarity (-17..17)"); |
| |
| /* Deprecated module parameters - consider not using them anymore */ |
| |
| static int lcd_enabled = NOT_SET; |
| module_param(lcd_enabled, int, 0000); |
| MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); |
| |
| static int keypad_enabled = NOT_SET; |
| module_param(keypad_enabled, int, 0000); |
| MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); |
| |
| /* for some LCD drivers (ks0074) we need a charset conversion table. */ |
| static const unsigned char lcd_char_conv_ks0074[256] = { |
| /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
| /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
| /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, |
| /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, |
| /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, |
| /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, |
| /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, |
| /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, |
| /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, |
| /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, |
| /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, |
| /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, |
| /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, |
| /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, |
| /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, |
| /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, |
| /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, |
| /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, |
| /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, |
| /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, |
| /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, |
| /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, |
| /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, |
| /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, |
| /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, |
| /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, |
| /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, |
| /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, |
| /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, |
| /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, |
| /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, |
| /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, |
| /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, |
| }; |
| |
| static const char old_keypad_profile[][4][9] = { |
| {"S0", "Left\n", "Left\n", ""}, |
| {"S1", "Down\n", "Down\n", ""}, |
| {"S2", "Up\n", "Up\n", ""}, |
| {"S3", "Right\n", "Right\n", ""}, |
| {"S4", "Esc\n", "Esc\n", ""}, |
| {"S5", "Ret\n", "Ret\n", ""}, |
| {"", "", "", ""} |
| }; |
| |
| /* signals, press, repeat, release */ |
| static const char new_keypad_profile[][4][9] = { |
| {"S0", "Left\n", "Left\n", ""}, |
| {"S1", "Down\n", "Down\n", ""}, |
| {"S2", "Up\n", "Up\n", ""}, |
| {"S3", "Right\n", "Right\n", ""}, |
| {"S4s5", "", "Esc\n", "Esc\n"}, |
| {"s4S5", "", "Ret\n", "Ret\n"}, |
| {"S4S5", "Help\n", "", ""}, |
| /* add new signals above this line */ |
| {"", "", "", ""} |
| }; |
| |
| /* signals, press, repeat, release */ |
| static const char nexcom_keypad_profile[][4][9] = { |
| {"a-p-e-", "Down\n", "Down\n", ""}, |
| {"a-p-E-", "Ret\n", "Ret\n", ""}, |
| {"a-P-E-", "Esc\n", "Esc\n", ""}, |
| {"a-P-e-", "Up\n", "Up\n", ""}, |
| /* add new signals above this line */ |
| {"", "", "", ""} |
| }; |
| |
| static const char (*keypad_profile)[4][9] = old_keypad_profile; |
| |
| static DECLARE_BITMAP(bits, LCD_BITS); |
| |
| static void lcd_get_bits(unsigned int port, int *val) |
| { |
| unsigned int bit, state; |
| |
| for (bit = 0; bit < LCD_BITS; bit++) { |
| state = test_bit(bit, bits) ? BIT_SET : BIT_CLR; |
| *val &= lcd_bits[port][bit][BIT_MSK]; |
| *val |= lcd_bits[port][bit][state]; |
| } |
| } |
| |
| /* sets data port bits according to current signals values */ |
| static int set_data_bits(void) |
| { |
| int val; |
| |
| val = r_dtr(pprt); |
| lcd_get_bits(LCD_PORT_D, &val); |
| w_dtr(pprt, val); |
| return val; |
| } |
| |
| /* sets ctrl port bits according to current signals values */ |
| static int set_ctrl_bits(void) |
| { |
| int val; |
| |
| val = r_ctr(pprt); |
| lcd_get_bits(LCD_PORT_C, &val); |
| w_ctr(pprt, val); |
| return val; |
| } |
| |
| /* sets ctrl & data port bits according to current signals values */ |
| static void panel_set_bits(void) |
| { |
| set_data_bits(); |
| set_ctrl_bits(); |
| } |
| |
| /* |
| * Converts a parallel port pin (from -25 to 25) to data and control ports |
| * masks, and data and control port bits. The signal will be considered |
| * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). |
| * |
| * Result will be used this way : |
| * out(dport, in(dport) & d_val[2] | d_val[signal_state]) |
| * out(cport, in(cport) & c_val[2] | c_val[signal_state]) |
| */ |
| static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
| { |
| int d_bit, c_bit, inv; |
| |
| d_val[0] = 0; |
| c_val[0] = 0; |
| d_val[1] = 0; |
| c_val[1] = 0; |
| d_val[2] = 0xFF; |
| c_val[2] = 0xFF; |
| |
| if (pin == 0) |
| return; |
| |
| inv = (pin < 0); |
| if (inv) |
| pin = -pin; |
| |
| d_bit = 0; |
| c_bit = 0; |
| |
| switch (pin) { |
| case PIN_STROBE: /* strobe, inverted */ |
| c_bit = PNL_PSTROBE; |
| inv = !inv; |
| break; |
| case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ |
| d_bit = 1 << (pin - 2); |
| break; |
| case PIN_AUTOLF: /* autofeed, inverted */ |
| c_bit = PNL_PAUTOLF; |
| inv = !inv; |
| break; |
| case PIN_INITP: /* init, direct */ |
| c_bit = PNL_PINITP; |
| break; |
| case PIN_SELECP: /* select_in, inverted */ |
| c_bit = PNL_PSELECP; |
| inv = !inv; |
| break; |
| default: /* unknown pin, ignore */ |
| break; |
| } |
| |
| if (c_bit) { |
| c_val[2] &= ~c_bit; |
| c_val[!inv] = c_bit; |
| } else if (d_bit) { |
| d_val[2] &= ~d_bit; |
| d_val[!inv] = d_bit; |
| } |
| } |
| |
| /* |
| * send a serial byte to the LCD panel. The caller is responsible for locking |
| * if needed. |
| */ |
| static void lcd_send_serial(int byte) |
| { |
| int bit; |
| |
| /* |
| * the data bit is set on D0, and the clock on STROBE. |
| * LCD reads D0 on STROBE's rising edge. |
| */ |
| for (bit = 0; bit < 8; bit++) { |
| clear_bit(LCD_BIT_CL, bits); /* CLK low */ |
| panel_set_bits(); |
| if (byte & 1) { |
| set_bit(LCD_BIT_DA, bits); |
| } else { |
| clear_bit(LCD_BIT_DA, bits); |
| } |
| |
| panel_set_bits(); |
| udelay(2); /* maintain the data during 2 us before CLK up */ |
| set_bit(LCD_BIT_CL, bits); /* CLK high */ |
| panel_set_bits(); |
| udelay(1); /* maintain the strobe during 1 us */ |
| byte >>= 1; |
| } |
| } |
| |
| /* turn the backlight on or off */ |
| static void lcd_backlight(struct charlcd *charlcd, int on) |
| { |
| if (lcd.pins.bl == PIN_NONE) |
| return; |
| |
| /* The backlight is activated by setting the AUTOFEED line to +5V */ |
| spin_lock_irq(&pprt_lock); |
| if (on) |
| set_bit(LCD_BIT_BL, bits); |
| else |
| clear_bit(LCD_BIT_BL, bits); |
| panel_set_bits(); |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send a command to the LCD panel in serial mode */ |
| static void lcd_write_cmd_s(struct charlcd *charlcd, int cmd) |
| { |
| spin_lock_irq(&pprt_lock); |
| lcd_send_serial(0x1F); /* R/W=W, RS=0 */ |
| lcd_send_serial(cmd & 0x0F); |
| lcd_send_serial((cmd >> 4) & 0x0F); |
| udelay(40); /* the shortest command takes at least 40 us */ |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send data to the LCD panel in serial mode */ |
| static void lcd_write_data_s(struct charlcd *charlcd, int data) |
| { |
| spin_lock_irq(&pprt_lock); |
| lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
| lcd_send_serial(data & 0x0F); |
| lcd_send_serial((data >> 4) & 0x0F); |
| udelay(40); /* the shortest data takes at least 40 us */ |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send a command to the LCD panel in 8 bits parallel mode */ |
| static void lcd_write_cmd_p8(struct charlcd *charlcd, int cmd) |
| { |
| spin_lock_irq(&pprt_lock); |
| /* present the data to the data port */ |
| w_dtr(pprt, cmd); |
| udelay(20); /* maintain the data during 20 us before the strobe */ |
| |
| set_bit(LCD_BIT_E, bits); |
| clear_bit(LCD_BIT_RS, bits); |
| clear_bit(LCD_BIT_RW, bits); |
| set_ctrl_bits(); |
| |
| udelay(40); /* maintain the strobe during 40 us */ |
| |
| clear_bit(LCD_BIT_E, bits); |
| set_ctrl_bits(); |
| |
| udelay(120); /* the shortest command takes at least 120 us */ |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send data to the LCD panel in 8 bits parallel mode */ |
| static void lcd_write_data_p8(struct charlcd *charlcd, int data) |
| { |
| spin_lock_irq(&pprt_lock); |
| /* present the data to the data port */ |
| w_dtr(pprt, data); |
| udelay(20); /* maintain the data during 20 us before the strobe */ |
| |
| set_bit(LCD_BIT_E, bits); |
| set_bit(LCD_BIT_RS, bits); |
| clear_bit(LCD_BIT_RW, bits); |
| set_ctrl_bits(); |
| |
| udelay(40); /* maintain the strobe during 40 us */ |
| |
| clear_bit(LCD_BIT_E, bits); |
| set_ctrl_bits(); |
| |
| udelay(45); /* the shortest data takes at least 45 us */ |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send a command to the TI LCD panel */ |
| static void lcd_write_cmd_tilcd(struct charlcd *charlcd, int cmd) |
| { |
| spin_lock_irq(&pprt_lock); |
| /* present the data to the control port */ |
| w_ctr(pprt, cmd); |
| udelay(60); |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* send data to the TI LCD panel */ |
| static void lcd_write_data_tilcd(struct charlcd *charlcd, int data) |
| { |
| spin_lock_irq(&pprt_lock); |
| /* present the data to the data port */ |
| w_dtr(pprt, data); |
| udelay(60); |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* fills the display with spaces and resets X/Y */ |
| static void lcd_clear_fast_s(struct charlcd *charlcd) |
| { |
| int pos; |
| |
| spin_lock_irq(&pprt_lock); |
| for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) { |
| lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
| lcd_send_serial(' ' & 0x0F); |
| lcd_send_serial((' ' >> 4) & 0x0F); |
| /* the shortest data takes at least 40 us */ |
| udelay(40); |
| } |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* fills the display with spaces and resets X/Y */ |
| static void lcd_clear_fast_p8(struct charlcd *charlcd) |
| { |
| int pos; |
| |
| spin_lock_irq(&pprt_lock); |
| for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) { |
| /* present the data to the data port */ |
| w_dtr(pprt, ' '); |
| |
| /* maintain the data during 20 us before the strobe */ |
| udelay(20); |
| |
| set_bit(LCD_BIT_E, bits); |
| set_bit(LCD_BIT_RS, bits); |
| clear_bit(LCD_BIT_RW, bits); |
| set_ctrl_bits(); |
| |
| /* maintain the strobe during 40 us */ |
| udelay(40); |
| |
| clear_bit(LCD_BIT_E, bits); |
| set_ctrl_bits(); |
| |
| /* the shortest data takes at least 45 us */ |
| udelay(45); |
| } |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| /* fills the display with spaces and resets X/Y */ |
| static void lcd_clear_fast_tilcd(struct charlcd *charlcd) |
| { |
| int pos; |
| |
| spin_lock_irq(&pprt_lock); |
| for (pos = 0; pos < charlcd->height * charlcd->hwidth; pos++) { |
| /* present the data to the data port */ |
| w_dtr(pprt, ' '); |
| udelay(60); |
| } |
| |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| static const struct charlcd_ops charlcd_serial_ops = { |
| .write_cmd = lcd_write_cmd_s, |
| .write_data = lcd_write_data_s, |
| .clear_fast = lcd_clear_fast_s, |
| .backlight = lcd_backlight, |
| }; |
| |
| static const struct charlcd_ops charlcd_parallel_ops = { |
| .write_cmd = lcd_write_cmd_p8, |
| .write_data = lcd_write_data_p8, |
| .clear_fast = lcd_clear_fast_p8, |
| .backlight = lcd_backlight, |
| }; |
| |
| static const struct charlcd_ops charlcd_tilcd_ops = { |
| .write_cmd = lcd_write_cmd_tilcd, |
| .write_data = lcd_write_data_tilcd, |
| .clear_fast = lcd_clear_fast_tilcd, |
| .backlight = lcd_backlight, |
| }; |
| |
| /* initialize the LCD driver */ |
| static void lcd_init(void) |
| { |
| struct charlcd *charlcd; |
| |
| charlcd = charlcd_alloc(0); |
| if (!charlcd) |
| return; |
| |
| /* |
| * Init lcd struct with load-time values to preserve exact |
| * current functionality (at least for now). |
| */ |
| charlcd->height = lcd_height; |
| charlcd->width = lcd_width; |
| charlcd->bwidth = lcd_bwidth; |
| charlcd->hwidth = lcd_hwidth; |
| |
| switch (selected_lcd_type) { |
| case LCD_TYPE_OLD: |
| /* parallel mode, 8 bits */ |
| lcd.proto = LCD_PROTO_PARALLEL; |
| lcd.charset = LCD_CHARSET_NORMAL; |
| lcd.pins.e = PIN_STROBE; |
| lcd.pins.rs = PIN_AUTOLF; |
| |
| charlcd->width = 40; |
| charlcd->bwidth = 40; |
| charlcd->hwidth = 64; |
| charlcd->height = 2; |
| break; |
| case LCD_TYPE_KS0074: |
| /* serial mode, ks0074 */ |
| lcd.proto = LCD_PROTO_SERIAL; |
| lcd.charset = LCD_CHARSET_KS0074; |
| lcd.pins.bl = PIN_AUTOLF; |
| lcd.pins.cl = PIN_STROBE; |
| lcd.pins.da = PIN_D0; |
| |
| charlcd->width = 16; |
| charlcd->bwidth = 40; |
| charlcd->hwidth = 16; |
| charlcd->height = 2; |
| break; |
| case LCD_TYPE_NEXCOM: |
| /* parallel mode, 8 bits, generic */ |
| lcd.proto = LCD_PROTO_PARALLEL; |
| lcd.charset = LCD_CHARSET_NORMAL; |
| lcd.pins.e = PIN_AUTOLF; |
| lcd.pins.rs = PIN_SELECP; |
| lcd.pins.rw = PIN_INITP; |
| |
| charlcd->width = 16; |
| charlcd->bwidth = 40; |
| charlcd->hwidth = 64; |
| charlcd->height = 2; |
| break; |
| case LCD_TYPE_CUSTOM: |
| /* customer-defined */ |
| lcd.proto = DEFAULT_LCD_PROTO; |
| lcd.charset = DEFAULT_LCD_CHARSET; |
| /* default geometry will be set later */ |
| break; |
| case LCD_TYPE_HANTRONIX: |
| /* parallel mode, 8 bits, hantronix-like */ |
| default: |
| lcd.proto = LCD_PROTO_PARALLEL; |
| lcd.charset = LCD_CHARSET_NORMAL; |
| lcd.pins.e = PIN_STROBE; |
| lcd.pins.rs = PIN_SELECP; |
| |
| charlcd->width = 16; |
| charlcd->bwidth = 40; |
| charlcd->hwidth = 64; |
| charlcd->height = 2; |
| break; |
| } |
| |
| /* Overwrite with module params set on loading */ |
| if (lcd_height != NOT_SET) |
| charlcd->height = lcd_height; |
| if (lcd_width != NOT_SET) |
| charlcd->width = lcd_width; |
| if (lcd_bwidth != NOT_SET) |
| charlcd->bwidth = lcd_bwidth; |
| if (lcd_hwidth != NOT_SET) |
| charlcd->hwidth = lcd_hwidth; |
| if (lcd_charset != NOT_SET) |
| lcd.charset = lcd_charset; |
| if (lcd_proto != NOT_SET) |
| lcd.proto = lcd_proto; |
| if (lcd_e_pin != PIN_NOT_SET) |
| lcd.pins.e = lcd_e_pin; |
| if (lcd_rs_pin != PIN_NOT_SET) |
| lcd.pins.rs = lcd_rs_pin; |
| if (lcd_rw_pin != PIN_NOT_SET) |
| lcd.pins.rw = lcd_rw_pin; |
| if (lcd_cl_pin != PIN_NOT_SET) |
| lcd.pins.cl = lcd_cl_pin; |
| if (lcd_da_pin != PIN_NOT_SET) |
| lcd.pins.da = lcd_da_pin; |
| if (lcd_bl_pin != PIN_NOT_SET) |
| lcd.pins.bl = lcd_bl_pin; |
| |
| /* this is used to catch wrong and default values */ |
| if (charlcd->width <= 0) |
| charlcd->width = DEFAULT_LCD_WIDTH; |
| if (charlcd->bwidth <= 0) |
| charlcd->bwidth = DEFAULT_LCD_BWIDTH; |
| if (charlcd->hwidth <= 0) |
| charlcd->hwidth = DEFAULT_LCD_HWIDTH; |
| if (charlcd->height <= 0) |
| charlcd->height = DEFAULT_LCD_HEIGHT; |
| |
| if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ |
| charlcd->ops = &charlcd_serial_ops; |
| |
| if (lcd.pins.cl == PIN_NOT_SET) |
| lcd.pins.cl = DEFAULT_LCD_PIN_SCL; |
| if (lcd.pins.da == PIN_NOT_SET) |
| lcd.pins.da = DEFAULT_LCD_PIN_SDA; |
| |
| } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
| charlcd->ops = &charlcd_parallel_ops; |
| |
| if (lcd.pins.e == PIN_NOT_SET) |
| lcd.pins.e = DEFAULT_LCD_PIN_E; |
| if (lcd.pins.rs == PIN_NOT_SET) |
| lcd.pins.rs = DEFAULT_LCD_PIN_RS; |
| if (lcd.pins.rw == PIN_NOT_SET) |
| lcd.pins.rw = DEFAULT_LCD_PIN_RW; |
| } else { |
| charlcd->ops = &charlcd_tilcd_ops; |
| } |
| |
| if (lcd.pins.bl == PIN_NOT_SET) |
| lcd.pins.bl = DEFAULT_LCD_PIN_BL; |
| |
| if (lcd.pins.e == PIN_NOT_SET) |
| lcd.pins.e = PIN_NONE; |
| if (lcd.pins.rs == PIN_NOT_SET) |
| lcd.pins.rs = PIN_NONE; |
| if (lcd.pins.rw == PIN_NOT_SET) |
| lcd.pins.rw = PIN_NONE; |
| if (lcd.pins.bl == PIN_NOT_SET) |
| lcd.pins.bl = PIN_NONE; |
| if (lcd.pins.cl == PIN_NOT_SET) |
| lcd.pins.cl = PIN_NONE; |
| if (lcd.pins.da == PIN_NOT_SET) |
| lcd.pins.da = PIN_NONE; |
| |
| if (lcd.charset == NOT_SET) |
| lcd.charset = DEFAULT_LCD_CHARSET; |
| |
| if (lcd.charset == LCD_CHARSET_KS0074) |
| charlcd->char_conv = lcd_char_conv_ks0074; |
| else |
| charlcd->char_conv = NULL; |
| |
| pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], |
| lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
| pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
| lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
| pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
| lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
| pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
| lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
| pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
| lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
| pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
| lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
| |
| lcd.charlcd = charlcd; |
| lcd.initialized = true; |
| } |
| |
| /* |
| * These are the file operation function for user access to /dev/keypad |
| */ |
| |
| static ssize_t keypad_read(struct file *file, |
| char __user *buf, size_t count, loff_t *ppos) |
| { |
| unsigned i = *ppos; |
| char __user *tmp = buf; |
| |
| if (keypad_buflen == 0) { |
| if (file->f_flags & O_NONBLOCK) |
| return -EAGAIN; |
| |
| if (wait_event_interruptible(keypad_read_wait, |
| keypad_buflen != 0)) |
| return -EINTR; |
| } |
| |
| for (; count-- > 0 && (keypad_buflen > 0); |
| ++i, ++tmp, --keypad_buflen) { |
| put_user(keypad_buffer[keypad_start], tmp); |
| keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; |
| } |
| *ppos = i; |
| |
| return tmp - buf; |
| } |
| |
| static int keypad_open(struct inode *inode, struct file *file) |
| { |
| int ret; |
| |
| ret = -EBUSY; |
| if (!atomic_dec_and_test(&keypad_available)) |
| goto fail; /* open only once at a time */ |
| |
| ret = -EPERM; |
| if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
| goto fail; |
| |
| keypad_buflen = 0; /* flush the buffer on opening */ |
| return 0; |
| fail: |
| atomic_inc(&keypad_available); |
| return ret; |
| } |
| |
| static int keypad_release(struct inode *inode, struct file *file) |
| { |
| atomic_inc(&keypad_available); |
| return 0; |
| } |
| |
| static const struct file_operations keypad_fops = { |
| .read = keypad_read, /* read */ |
| .open = keypad_open, /* open */ |
| .release = keypad_release, /* close */ |
| .llseek = default_llseek, |
| }; |
| |
| static struct miscdevice keypad_dev = { |
| .minor = KEYPAD_MINOR, |
| .name = "keypad", |
| .fops = &keypad_fops, |
| }; |
| |
| static void keypad_send_key(const char *string, int max_len) |
| { |
| /* send the key to the device only if a process is attached to it. */ |
| if (!atomic_read(&keypad_available)) { |
| while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { |
| keypad_buffer[(keypad_start + keypad_buflen++) % |
| KEYPAD_BUFFER] = *string++; |
| } |
| wake_up_interruptible(&keypad_read_wait); |
| } |
| } |
| |
| /* this function scans all the bits involving at least one logical signal, |
| * and puts the results in the bitfield "phys_read" (one bit per established |
| * contact), and sets "phys_read_prev" to "phys_read". |
| * |
| * Note: to debounce input signals, we will only consider as switched a signal |
| * which is stable across 2 measures. Signals which are different between two |
| * reads will be kept as they previously were in their logical form (phys_prev). |
| * A signal which has just switched will have a 1 in |
| * (phys_read ^ phys_read_prev). |
| */ |
| static void phys_scan_contacts(void) |
| { |
| int bit, bitval; |
| char oldval; |
| char bitmask; |
| char gndmask; |
| |
| phys_prev = phys_curr; |
| phys_read_prev = phys_read; |
| phys_read = 0; /* flush all signals */ |
| |
| /* keep track of old value, with all outputs disabled */ |
| oldval = r_dtr(pprt) | scan_mask_o; |
| /* activate all keyboard outputs (active low) */ |
| w_dtr(pprt, oldval & ~scan_mask_o); |
| |
| /* will have a 1 for each bit set to gnd */ |
| bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; |
| /* disable all matrix signals */ |
| w_dtr(pprt, oldval); |
| |
| /* now that all outputs are cleared, the only active input bits are |
| * directly connected to the ground |
| */ |
| |
| /* 1 for each grounded input */ |
| gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; |
| |
| /* grounded inputs are signals 40-44 */ |
| phys_read |= (__u64)gndmask << 40; |
| |
| if (bitmask != gndmask) { |
| /* |
| * since clearing the outputs changed some inputs, we know |
| * that some input signals are currently tied to some outputs. |
| * So we'll scan them. |
| */ |
| for (bit = 0; bit < 8; bit++) { |
| bitval = BIT(bit); |
| |
| if (!(scan_mask_o & bitval)) /* skip unused bits */ |
| continue; |
| |
| w_dtr(pprt, oldval & ~bitval); /* enable this output */ |
| bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; |
| phys_read |= (__u64)bitmask << (5 * bit); |
| } |
| w_dtr(pprt, oldval); /* disable all outputs */ |
| } |
| /* |
| * this is easy: use old bits when they are flapping, |
| * use new ones when stable |
| */ |
| phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | |
| (phys_read & ~(phys_read ^ phys_read_prev)); |
| } |
| |
| static inline int input_state_high(struct logical_input *input) |
| { |
| #if 0 |
| /* FIXME: |
| * this is an invalid test. It tries to catch |
| * transitions from single-key to multiple-key, but |
| * doesn't take into account the contacts polarity. |
| * The only solution to the problem is to parse keys |
| * from the most complex to the simplest combinations, |
| * and mark them as 'caught' once a combination |
| * matches, then unmatch it for all other ones. |
| */ |
| |
| /* try to catch dangerous transitions cases : |
| * someone adds a bit, so this signal was a false |
| * positive resulting from a transition. We should |
| * invalidate the signal immediately and not call the |
| * release function. |
| * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. |
| */ |
| if (((phys_prev & input->mask) == input->value) && |
| ((phys_curr & input->mask) > input->value)) { |
| input->state = INPUT_ST_LOW; /* invalidate */ |
| return 1; |
| } |
| #endif |
| |
| if ((phys_curr & input->mask) == input->value) { |
| if ((input->type == INPUT_TYPE_STD) && |
| (input->high_timer == 0)) { |
| input->high_timer++; |
| if (input->u.std.press_fct) |
| input->u.std.press_fct(input->u.std.press_data); |
| } else if (input->type == INPUT_TYPE_KBD) { |
| /* will turn on the light */ |
| keypressed = 1; |
| |
| if (input->high_timer == 0) { |
| char *press_str = input->u.kbd.press_str; |
| |
| if (press_str[0]) { |
| int s = sizeof(input->u.kbd.press_str); |
| |
| keypad_send_key(press_str, s); |
| } |
| } |
| |
| if (input->u.kbd.repeat_str[0]) { |
| char *repeat_str = input->u.kbd.repeat_str; |
| |
| if (input->high_timer >= KEYPAD_REP_START) { |
| int s = sizeof(input->u.kbd.repeat_str); |
| |
| input->high_timer -= KEYPAD_REP_DELAY; |
| keypad_send_key(repeat_str, s); |
| } |
| /* we will need to come back here soon */ |
| inputs_stable = 0; |
| } |
| |
| if (input->high_timer < 255) |
| input->high_timer++; |
| } |
| return 1; |
| } |
| |
| /* else signal falling down. Let's fall through. */ |
| input->state = INPUT_ST_FALLING; |
| input->fall_timer = 0; |
| |
| return 0; |
| } |
| |
| static inline void input_state_falling(struct logical_input *input) |
| { |
| #if 0 |
| /* FIXME !!! same comment as in input_state_high */ |
| if (((phys_prev & input->mask) == input->value) && |
| ((phys_curr & input->mask) > input->value)) { |
| input->state = INPUT_ST_LOW; /* invalidate */ |
| return; |
| } |
| #endif |
| |
| if ((phys_curr & input->mask) == input->value) { |
| if (input->type == INPUT_TYPE_KBD) { |
| /* will turn on the light */ |
| keypressed = 1; |
| |
| if (input->u.kbd.repeat_str[0]) { |
| char *repeat_str = input->u.kbd.repeat_str; |
| |
| if (input->high_timer >= KEYPAD_REP_START) { |
| int s = sizeof(input->u.kbd.repeat_str); |
| |
| input->high_timer -= KEYPAD_REP_DELAY; |
| keypad_send_key(repeat_str, s); |
| } |
| /* we will need to come back here soon */ |
| inputs_stable = 0; |
| } |
| |
| if (input->high_timer < 255) |
| input->high_timer++; |
| } |
| input->state = INPUT_ST_HIGH; |
| } else if (input->fall_timer >= input->fall_time) { |
| /* call release event */ |
| if (input->type == INPUT_TYPE_STD) { |
| void (*release_fct)(int) = input->u.std.release_fct; |
| |
| if (release_fct) |
| release_fct(input->u.std.release_data); |
| } else if (input->type == INPUT_TYPE_KBD) { |
| char *release_str = input->u.kbd.release_str; |
| |
| if (release_str[0]) { |
| int s = sizeof(input->u.kbd.release_str); |
| |
| keypad_send_key(release_str, s); |
| } |
| } |
| |
| input->state = INPUT_ST_LOW; |
| } else { |
| input->fall_timer++; |
| inputs_stable = 0; |
| } |
| } |
| |
| static void panel_process_inputs(void) |
| { |
| struct logical_input *input; |
| |
| keypressed = 0; |
| inputs_stable = 1; |
| list_for_each_entry(input, &logical_inputs, list) { |
| switch (input->state) { |
| case INPUT_ST_LOW: |
| if ((phys_curr & input->mask) != input->value) |
| break; |
| /* if all needed ones were already set previously, |
| * this means that this logical signal has been |
| * activated by the releasing of another combined |
| * signal, so we don't want to match. |
| * eg: AB -(release B)-> A -(release A)-> 0 : |
| * don't match A. |
| */ |
| if ((phys_prev & input->mask) == input->value) |
| break; |
| input->rise_timer = 0; |
| input->state = INPUT_ST_RISING; |
| /* no break here, fall through */ |
| case INPUT_ST_RISING: |
| if ((phys_curr & input->mask) != input->value) { |
| input->state = INPUT_ST_LOW; |
| break; |
| } |
| if (input->rise_timer < input->rise_time) { |
| inputs_stable = 0; |
| input->rise_timer++; |
| break; |
| } |
| input->high_timer = 0; |
| input->state = INPUT_ST_HIGH; |
| /* no break here, fall through */ |
| case INPUT_ST_HIGH: |
| if (input_state_high(input)) |
| break; |
| /* no break here, fall through */ |
| case INPUT_ST_FALLING: |
| input_state_falling(input); |
| } |
| } |
| } |
| |
| static void panel_scan_timer(void) |
| { |
| if (keypad.enabled && keypad_initialized) { |
| if (spin_trylock_irq(&pprt_lock)) { |
| phys_scan_contacts(); |
| |
| /* no need for the parport anymore */ |
| spin_unlock_irq(&pprt_lock); |
| } |
| |
| if (!inputs_stable || phys_curr != phys_prev) |
| panel_process_inputs(); |
| } |
| |
| if (keypressed && lcd.enabled && lcd.initialized) |
| charlcd_poke(lcd.charlcd); |
| |
| mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); |
| } |
| |
| static void init_scan_timer(void) |
| { |
| if (scan_timer.function) |
| return; /* already started */ |
| |
| setup_timer(&scan_timer, (void *)&panel_scan_timer, 0); |
| scan_timer.expires = jiffies + INPUT_POLL_TIME; |
| add_timer(&scan_timer); |
| } |
| |
| /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. |
| * if <omask> or <imask> are non-null, they will be or'ed with the bits |
| * corresponding to out and in bits respectively. |
| * returns 1 if ok, 0 if error (in which case, nothing is written). |
| */ |
| static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value, |
| u8 *imask, u8 *omask) |
| { |
| const char sigtab[] = "EeSsPpAaBb"; |
| u8 im, om; |
| __u64 m, v; |
| |
| om = 0; |
| im = 0; |
| m = 0ULL; |
| v = 0ULL; |
| while (*name) { |
| int in, out, bit, neg; |
| const char *idx; |
| |
| idx = strchr(sigtab, *name); |
| if (!idx) |
| return 0; /* input name not found */ |
| |
| in = idx - sigtab; |
| neg = (in & 1); /* odd (lower) names are negated */ |
| in >>= 1; |
| im |= BIT(in); |
| |
| name++; |
| if (*name >= '0' && *name <= '7') { |
| out = *name - '0'; |
| om |= BIT(out); |
| } else if (*name == '-') { |
| out = 8; |
| } else { |
| return 0; /* unknown bit name */ |
| } |
| |
| bit = (out * 5) + in; |
| |
| m |= 1ULL << bit; |
| if (!neg) |
| v |= 1ULL << bit; |
| name++; |
| } |
| *mask = m; |
| *value = v; |
| if (imask) |
| *imask |= im; |
| if (omask) |
| *omask |= om; |
| return 1; |
| } |
| |
| /* tries to bind a key to the signal name <name>. The key will send the |
| * strings <press>, <repeat>, <release> for these respective events. |
| * Returns the pointer to the new key if ok, NULL if the key could not be bound. |
| */ |
| static struct logical_input *panel_bind_key(const char *name, const char *press, |
| const char *repeat, |
| const char *release) |
| { |
| struct logical_input *key; |
| |
| key = kzalloc(sizeof(*key), GFP_KERNEL); |
| if (!key) |
| return NULL; |
| |
| if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
| &scan_mask_o)) { |
| kfree(key); |
| return NULL; |
| } |
| |
| key->type = INPUT_TYPE_KBD; |
| key->state = INPUT_ST_LOW; |
| key->rise_time = 1; |
| key->fall_time = 1; |
| |
| strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
| strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); |
| strncpy(key->u.kbd.release_str, release, |
| sizeof(key->u.kbd.release_str)); |
| list_add(&key->list, &logical_inputs); |
| return key; |
| } |
| |
| #if 0 |
| /* tries to bind a callback function to the signal name <name>. The function |
| * <press_fct> will be called with the <press_data> arg when the signal is |
| * activated, and so on for <release_fct>/<release_data> |
| * Returns the pointer to the new signal if ok, NULL if the signal could not |
| * be bound. |
| */ |
| static struct logical_input *panel_bind_callback(char *name, |
| void (*press_fct)(int), |
| int press_data, |
| void (*release_fct)(int), |
| int release_data) |
| { |
| struct logical_input *callback; |
| |
| callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
| if (!callback) |
| return NULL; |
| |
| memset(callback, 0, sizeof(struct logical_input)); |
| if (!input_name2mask(name, &callback->mask, &callback->value, |
| &scan_mask_i, &scan_mask_o)) |
| return NULL; |
| |
| callback->type = INPUT_TYPE_STD; |
| callback->state = INPUT_ST_LOW; |
| callback->rise_time = 1; |
| callback->fall_time = 1; |
| callback->u.std.press_fct = press_fct; |
| callback->u.std.press_data = press_data; |
| callback->u.std.release_fct = release_fct; |
| callback->u.std.release_data = release_data; |
| list_add(&callback->list, &logical_inputs); |
| return callback; |
| } |
| #endif |
| |
| static void keypad_init(void) |
| { |
| int keynum; |
| |
| init_waitqueue_head(&keypad_read_wait); |
| keypad_buflen = 0; /* flushes any eventual noisy keystroke */ |
| |
| /* Let's create all known keys */ |
| |
| for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
| panel_bind_key(keypad_profile[keynum][0], |
| keypad_profile[keynum][1], |
| keypad_profile[keynum][2], |
| keypad_profile[keynum][3]); |
| } |
| |
| init_scan_timer(); |
| keypad_initialized = 1; |
| } |
| |
| /**************************************************/ |
| /* device initialization */ |
| /**************************************************/ |
| |
| static void panel_attach(struct parport *port) |
| { |
| struct pardev_cb panel_cb; |
| |
| if (port->number != parport) |
| return; |
| |
| if (pprt) { |
| pr_err("%s: port->number=%d parport=%d, already registered!\n", |
| __func__, port->number, parport); |
| return; |
| } |
| |
| memset(&panel_cb, 0, sizeof(panel_cb)); |
| panel_cb.private = &pprt; |
| /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ |
| |
| pprt = parport_register_dev_model(port, "panel", &panel_cb, 0); |
| if (!pprt) { |
| pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", |
| __func__, port->number, parport); |
| return; |
| } |
| |
| if (parport_claim(pprt)) { |
| pr_err("could not claim access to parport%d. Aborting.\n", |
| parport); |
| goto err_unreg_device; |
| } |
| |
| /* must init LCD first, just in case an IRQ from the keypad is |
| * generated at keypad init |
| */ |
| if (lcd.enabled) { |
| lcd_init(); |
| if (!lcd.charlcd || charlcd_register(lcd.charlcd)) |
| goto err_unreg_device; |
| } |
| |
| if (keypad.enabled) { |
| keypad_init(); |
| if (misc_register(&keypad_dev)) |
| goto err_lcd_unreg; |
| } |
| return; |
| |
| err_lcd_unreg: |
| if (scan_timer.function) |
| del_timer_sync(&scan_timer); |
| if (lcd.enabled) |
| charlcd_unregister(lcd.charlcd); |
| err_unreg_device: |
| kfree(lcd.charlcd); |
| lcd.charlcd = NULL; |
| parport_unregister_device(pprt); |
| pprt = NULL; |
| } |
| |
| static void panel_detach(struct parport *port) |
| { |
| if (port->number != parport) |
| return; |
| |
| if (!pprt) { |
| pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", |
| __func__, port->number, parport); |
| return; |
| } |
| if (scan_timer.function) |
| del_timer_sync(&scan_timer); |
| |
| if (keypad.enabled) { |
| misc_deregister(&keypad_dev); |
| keypad_initialized = 0; |
| } |
| |
| if (lcd.enabled) { |
| charlcd_unregister(lcd.charlcd); |
| lcd.initialized = false; |
| kfree(lcd.charlcd); |
| lcd.charlcd = NULL; |
| } |
| |
| /* TODO: free all input signals */ |
| parport_release(pprt); |
| parport_unregister_device(pprt); |
| pprt = NULL; |
| } |
| |
| static struct parport_driver panel_driver = { |
| .name = "panel", |
| .match_port = panel_attach, |
| .detach = panel_detach, |
| .devmodel = true, |
| }; |
| |
| /* init function */ |
| static int __init panel_init_module(void) |
| { |
| int selected_keypad_type = NOT_SET, err; |
| |
| /* take care of an eventual profile */ |
| switch (profile) { |
| case PANEL_PROFILE_CUSTOM: |
| /* custom profile */ |
| selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
| selected_lcd_type = DEFAULT_LCD_TYPE; |
| break; |
| case PANEL_PROFILE_OLD: |
| /* 8 bits, 2*16, old keypad */ |
| selected_keypad_type = KEYPAD_TYPE_OLD; |
| selected_lcd_type = LCD_TYPE_OLD; |
| |
| /* TODO: This two are a little hacky, sort it out later */ |
| if (lcd_width == NOT_SET) |
| lcd_width = 16; |
| if (lcd_hwidth == NOT_SET) |
| lcd_hwidth = 16; |
| break; |
| case PANEL_PROFILE_NEW: |
| /* serial, 2*16, new keypad */ |
| selected_keypad_type = KEYPAD_TYPE_NEW; |
| selected_lcd_type = LCD_TYPE_KS0074; |
| break; |
| case PANEL_PROFILE_HANTRONIX: |
| /* 8 bits, 2*16 hantronix-like, no keypad */ |
| selected_keypad_type = KEYPAD_TYPE_NONE; |
| selected_lcd_type = LCD_TYPE_HANTRONIX; |
| break; |
| case PANEL_PROFILE_NEXCOM: |
| /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ |
| selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
| selected_lcd_type = LCD_TYPE_NEXCOM; |
| break; |
| case PANEL_PROFILE_LARGE: |
| /* 8 bits, 2*40, old keypad */ |
| selected_keypad_type = KEYPAD_TYPE_OLD; |
| selected_lcd_type = LCD_TYPE_OLD; |
| break; |
| } |
| |
| /* |
| * Overwrite selection with module param values (both keypad and lcd), |
| * where the deprecated params have lower prio. |
| */ |
| if (keypad_enabled != NOT_SET) |
| selected_keypad_type = keypad_enabled; |
| if (keypad_type != NOT_SET) |
| selected_keypad_type = keypad_type; |
| |
| keypad.enabled = (selected_keypad_type > 0); |
| |
| if (lcd_enabled != NOT_SET) |
| selected_lcd_type = lcd_enabled; |
| if (lcd_type != NOT_SET) |
| selected_lcd_type = lcd_type; |
| |
| lcd.enabled = (selected_lcd_type > 0); |
| |
| if (lcd.enabled) { |
| /* |
| * Init lcd struct with load-time values to preserve exact |
| * current functionality (at least for now). |
| */ |
| lcd.charset = lcd_charset; |
| lcd.proto = lcd_proto; |
| lcd.pins.e = lcd_e_pin; |
| lcd.pins.rs = lcd_rs_pin; |
| lcd.pins.rw = lcd_rw_pin; |
| lcd.pins.cl = lcd_cl_pin; |
| lcd.pins.da = lcd_da_pin; |
| lcd.pins.bl = lcd_bl_pin; |
| } |
| |
| switch (selected_keypad_type) { |
| case KEYPAD_TYPE_OLD: |
| keypad_profile = old_keypad_profile; |
| break; |
| case KEYPAD_TYPE_NEW: |
| keypad_profile = new_keypad_profile; |
| break; |
| case KEYPAD_TYPE_NEXCOM: |
| keypad_profile = nexcom_keypad_profile; |
| break; |
| default: |
| keypad_profile = NULL; |
| break; |
| } |
| |
| if (!lcd.enabled && !keypad.enabled) { |
| /* no device enabled, let's exit */ |
| pr_err("panel driver disabled.\n"); |
| return -ENODEV; |
| } |
| |
| err = parport_register_driver(&panel_driver); |
| if (err) { |
| pr_err("could not register with parport. Aborting.\n"); |
| return err; |
| } |
| |
| if (pprt) |
| pr_info("panel driver registered on parport%d (io=0x%lx).\n", |
| parport, pprt->port->base); |
| else |
| pr_info("panel driver not yet registered\n"); |
| return 0; |
| } |
| |
| static void __exit panel_cleanup_module(void) |
| { |
| parport_unregister_driver(&panel_driver); |
| } |
| |
| module_init(panel_init_module); |
| module_exit(panel_cleanup_module); |
| MODULE_AUTHOR("Willy Tarreau"); |
| MODULE_LICENSE("GPL"); |
| |
| /* |
| * Local variables: |
| * c-indent-level: 4 |
| * tab-width: 8 |
| * End: |
| */ |