forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1746 lines
46 KiB
1746 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Front panel driver for Linux |
|
* Copyright (C) 2000-2008, Willy Tarreau <[email protected]> |
|
* Copyright (C) 2016-2017 Glider bvba |
|
* |
|
* 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 "charlcd.h" |
|
#include "hd44780_common.h" |
|
|
|
#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 */ |
|
char press_str[sizeof(void *) + sizeof(int)] __nonstring; |
|
char repeat_str[sizeof(void *) + sizeof(int)] __nonstring; |
|
char release_str[sizeof(void *) + sizeof(int)] __nonstring; |
|
} 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_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, enum charlcd_onoff 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 hd44780_common *hdc, 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 hd44780_common *hdc, 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 hd44780_common *hdc, 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 hd44780_common *hdc, 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 hd44780_common *hdc, 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 hd44780_common *hdc, 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 const struct charlcd_ops charlcd_ops = { |
|
.backlight = lcd_backlight, |
|
.print = hd44780_common_print, |
|
.gotoxy = hd44780_common_gotoxy, |
|
.home = hd44780_common_home, |
|
.clear_display = hd44780_common_clear_display, |
|
.init_display = hd44780_common_init_display, |
|
.shift_cursor = hd44780_common_shift_cursor, |
|
.shift_display = hd44780_common_shift_display, |
|
.display = hd44780_common_display, |
|
.cursor = hd44780_common_cursor, |
|
.blink = hd44780_common_blink, |
|
.fontsize = hd44780_common_fontsize, |
|
.lines = hd44780_common_lines, |
|
.redefine_char = hd44780_common_redefine_char, |
|
}; |
|
|
|
/* initialize the LCD driver */ |
|
static void lcd_init(void) |
|
{ |
|
struct charlcd *charlcd; |
|
struct hd44780_common *hdc; |
|
|
|
hdc = hd44780_common_alloc(); |
|
if (!hdc) |
|
return; |
|
|
|
charlcd = charlcd_alloc(); |
|
if (!charlcd) { |
|
kfree(hdc); |
|
return; |
|
} |
|
|
|
hdc->hd44780 = &lcd; |
|
charlcd->drvdata = hdc; |
|
|
|
/* |
|
* Init lcd struct with load-time values to preserve exact |
|
* current functionality (at least for now). |
|
*/ |
|
charlcd->height = lcd_height; |
|
charlcd->width = lcd_width; |
|
hdc->bwidth = lcd_bwidth; |
|
hdc->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; |
|
hdc->bwidth = 40; |
|
hdc->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; |
|
hdc->bwidth = 40; |
|
hdc->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; |
|
hdc->bwidth = 40; |
|
hdc->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; |
|
hdc->bwidth = 40; |
|
hdc->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) |
|
hdc->bwidth = lcd_bwidth; |
|
if (lcd_hwidth != NOT_SET) |
|
hdc->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 (hdc->bwidth <= 0) |
|
hdc->bwidth = DEFAULT_LCD_BWIDTH; |
|
if (hdc->hwidth <= 0) |
|
hdc->hwidth = DEFAULT_LCD_HWIDTH; |
|
if (charlcd->height <= 0) |
|
charlcd->height = DEFAULT_LCD_HEIGHT; |
|
|
|
if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ |
|
charlcd->ops = &charlcd_ops; |
|
hdc->write_data = lcd_write_data_s; |
|
hdc->write_cmd = lcd_write_cmd_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 */ |
|
charlcd->ops = &charlcd_ops; |
|
hdc->write_data = lcd_write_data_p8; |
|
hdc->write_cmd = lcd_write_cmd_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 { |
|
charlcd->ops = &charlcd_ops; |
|
hdc->write_data = lcd_write_data_tilcd; |
|
hdc->write_cmd = lcd_write_cmd_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) |
|
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; |
|
fallthrough; |
|
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; |
|
fallthrough; |
|
case INPUT_ST_HIGH: |
|
if (input_state_high(input)) |
|
break; |
|
fallthrough; |
|
case INPUT_ST_FALLING: |
|
input_state_falling(input); |
|
} |
|
} |
|
} |
|
|
|
static void panel_scan_timer(struct timer_list *unused) |
|
{ |
|
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 */ |
|
|
|
timer_setup(&scan_timer, 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->drvdata); |
|
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: |
|
*/
|
|
|