![Andy Shevchenko](/assets/img/avatar_default.png)
Convert to use charlcd_free() instead of kfree() for sake of type check. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
1796 lines
46 KiB
C
1796 lines
46 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Front panel driver for Linux
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* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
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* Copyright (C) 2016-2017 Glider bvba
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*
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* This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
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* connected to a parallel printer port.
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*
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* The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
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* serial module compatible with Samsung's KS0074. The pins may be connected in
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* any combination, everything is programmable.
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*
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* The keypad consists in a matrix of push buttons connecting input pins to
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* data output pins or to the ground. The combinations have to be hard-coded
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* in the driver, though several profiles exist and adding new ones is easy.
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*
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* Several profiles are provided for commonly found LCD+keypad modules on the
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* market, such as those found in Nexcom's appliances.
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*
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* FIXME:
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* - the initialization/deinitialization process is very dirty and should
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* be rewritten. It may even be buggy.
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*
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* TODO:
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* - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
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* - make the LCD a part of a virtual screen of Vx*Vy
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* - make the inputs list smp-safe
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* - change the keyboard to a double mapping : signals -> key_id -> values
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* so that applications can change values without knowing signals
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/ioport.h>
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#include <linux/fcntl.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/parport.h>
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#include <linux/list.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <misc/charlcd.h>
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#define KEYPAD_MINOR 185
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#define LCD_MAXBYTES 256 /* max burst write */
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#define KEYPAD_BUFFER 64
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/* poll the keyboard this every second */
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#define INPUT_POLL_TIME (HZ / 50)
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/* a key starts to repeat after this times INPUT_POLL_TIME */
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#define KEYPAD_REP_START (10)
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/* a key repeats this times INPUT_POLL_TIME */
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#define KEYPAD_REP_DELAY (2)
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/* converts an r_str() input to an active high, bits string : 000BAOSE */
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#define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3)
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#define PNL_PBUSY 0x80 /* inverted input, active low */
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#define PNL_PACK 0x40 /* direct input, active low */
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#define PNL_POUTPA 0x20 /* direct input, active high */
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#define PNL_PSELECD 0x10 /* direct input, active high */
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#define PNL_PERRORP 0x08 /* direct input, active low */
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#define PNL_PBIDIR 0x20 /* bi-directional ports */
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/* high to read data in or-ed with data out */
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#define PNL_PINTEN 0x10
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#define PNL_PSELECP 0x08 /* inverted output, active low */
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#define PNL_PINITP 0x04 /* direct output, active low */
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#define PNL_PAUTOLF 0x02 /* inverted output, active low */
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#define PNL_PSTROBE 0x01 /* inverted output */
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#define PNL_PD0 0x01
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#define PNL_PD1 0x02
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#define PNL_PD2 0x04
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#define PNL_PD3 0x08
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#define PNL_PD4 0x10
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#define PNL_PD5 0x20
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#define PNL_PD6 0x40
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#define PNL_PD7 0x80
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#define PIN_NONE 0
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#define PIN_STROBE 1
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#define PIN_D0 2
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#define PIN_D1 3
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#define PIN_D2 4
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#define PIN_D3 5
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#define PIN_D4 6
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#define PIN_D5 7
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#define PIN_D6 8
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#define PIN_D7 9
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#define PIN_AUTOLF 14
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#define PIN_INITP 16
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#define PIN_SELECP 17
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#define PIN_NOT_SET 127
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#define NOT_SET -1
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/* macros to simplify use of the parallel port */
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#define r_ctr(x) (parport_read_control((x)->port))
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#define r_dtr(x) (parport_read_data((x)->port))
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#define r_str(x) (parport_read_status((x)->port))
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#define w_ctr(x, y) (parport_write_control((x)->port, (y)))
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#define w_dtr(x, y) (parport_write_data((x)->port, (y)))
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/* this defines which bits are to be used and which ones to be ignored */
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/* logical or of the output bits involved in the scan matrix */
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static __u8 scan_mask_o;
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/* logical or of the input bits involved in the scan matrix */
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static __u8 scan_mask_i;
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enum input_type {
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INPUT_TYPE_STD,
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INPUT_TYPE_KBD,
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};
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enum input_state {
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INPUT_ST_LOW,
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INPUT_ST_RISING,
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INPUT_ST_HIGH,
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INPUT_ST_FALLING,
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};
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struct logical_input {
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struct list_head list;
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__u64 mask;
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__u64 value;
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enum input_type type;
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enum input_state state;
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__u8 rise_time, fall_time;
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__u8 rise_timer, fall_timer, high_timer;
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union {
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struct { /* valid when type == INPUT_TYPE_STD */
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void (*press_fct)(int);
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void (*release_fct)(int);
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int press_data;
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int release_data;
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} std;
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struct { /* valid when type == INPUT_TYPE_KBD */
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char press_str[sizeof(void *) + sizeof(int)] __nonstring;
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char repeat_str[sizeof(void *) + sizeof(int)] __nonstring;
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char release_str[sizeof(void *) + sizeof(int)] __nonstring;
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} kbd;
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} u;
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};
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static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */
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/* physical contacts history
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* Physical contacts are a 45 bits string of 9 groups of 5 bits each.
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* The 8 lower groups correspond to output bits 0 to 7, and the 9th group
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* corresponds to the ground.
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* Within each group, bits are stored in the same order as read on the port :
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* BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
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* So, each __u64 is represented like this :
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* 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
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* <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
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*/
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/* what has just been read from the I/O ports */
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static __u64 phys_read;
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/* previous phys_read */
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static __u64 phys_read_prev;
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/* stabilized phys_read (phys_read|phys_read_prev) */
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static __u64 phys_curr;
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/* previous phys_curr */
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static __u64 phys_prev;
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/* 0 means that at least one logical signal needs be computed */
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static char inputs_stable;
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/* these variables are specific to the keypad */
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static struct {
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bool enabled;
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} keypad;
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static char keypad_buffer[KEYPAD_BUFFER];
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static int keypad_buflen;
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static int keypad_start;
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static char keypressed;
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static wait_queue_head_t keypad_read_wait;
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/* lcd-specific variables */
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static struct {
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bool enabled;
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bool initialized;
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int charset;
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int proto;
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/* TODO: use union here? */
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struct {
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int e;
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int rs;
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int rw;
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int cl;
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int da;
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int bl;
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} pins;
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struct charlcd *charlcd;
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} lcd;
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/* Needed only for init */
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static int selected_lcd_type = NOT_SET;
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/*
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* Bit masks to convert LCD signals to parallel port outputs.
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* _d_ are values for data port, _c_ are for control port.
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* [0] = signal OFF, [1] = signal ON, [2] = mask
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*/
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#define BIT_CLR 0
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#define BIT_SET 1
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#define BIT_MSK 2
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#define BIT_STATES 3
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/*
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* one entry for each bit on the LCD
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*/
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#define LCD_BIT_E 0
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#define LCD_BIT_RS 1
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#define LCD_BIT_RW 2
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#define LCD_BIT_BL 3
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#define LCD_BIT_CL 4
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#define LCD_BIT_DA 5
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#define LCD_BITS 6
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/*
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* each bit can be either connected to a DATA or CTRL port
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*/
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#define LCD_PORT_C 0
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#define LCD_PORT_D 1
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#define LCD_PORTS 2
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static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
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/*
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* LCD protocols
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*/
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#define LCD_PROTO_PARALLEL 0
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#define LCD_PROTO_SERIAL 1
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#define LCD_PROTO_TI_DA8XX_LCD 2
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/*
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* LCD character sets
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*/
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#define LCD_CHARSET_NORMAL 0
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#define LCD_CHARSET_KS0074 1
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/*
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* LCD types
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*/
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#define LCD_TYPE_NONE 0
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#define LCD_TYPE_CUSTOM 1
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#define LCD_TYPE_OLD 2
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#define LCD_TYPE_KS0074 3
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#define LCD_TYPE_HANTRONIX 4
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#define LCD_TYPE_NEXCOM 5
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/*
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* keypad types
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*/
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#define KEYPAD_TYPE_NONE 0
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#define KEYPAD_TYPE_OLD 1
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#define KEYPAD_TYPE_NEW 2
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#define KEYPAD_TYPE_NEXCOM 3
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/*
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* panel profiles
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*/
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#define PANEL_PROFILE_CUSTOM 0
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#define PANEL_PROFILE_OLD 1
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#define PANEL_PROFILE_NEW 2
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#define PANEL_PROFILE_HANTRONIX 3
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#define PANEL_PROFILE_NEXCOM 4
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#define PANEL_PROFILE_LARGE 5
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/*
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* Construct custom config from the kernel's configuration
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*/
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#define DEFAULT_PARPORT 0
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#define DEFAULT_PROFILE PANEL_PROFILE_LARGE
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#define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD
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#define DEFAULT_LCD_TYPE LCD_TYPE_OLD
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#define DEFAULT_LCD_HEIGHT 2
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#define DEFAULT_LCD_WIDTH 40
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#define DEFAULT_LCD_BWIDTH 40
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#define DEFAULT_LCD_HWIDTH 64
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#define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL
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#define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL
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#define DEFAULT_LCD_PIN_E PIN_AUTOLF
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#define DEFAULT_LCD_PIN_RS PIN_SELECP
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#define DEFAULT_LCD_PIN_RW PIN_INITP
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#define DEFAULT_LCD_PIN_SCL PIN_STROBE
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#define DEFAULT_LCD_PIN_SDA PIN_D0
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#define DEFAULT_LCD_PIN_BL PIN_NOT_SET
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#ifdef CONFIG_PANEL_PARPORT
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#undef DEFAULT_PARPORT
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#define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
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#endif
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#ifdef CONFIG_PANEL_PROFILE
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#undef DEFAULT_PROFILE
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#define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
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#endif
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#if DEFAULT_PROFILE == 0 /* custom */
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#ifdef CONFIG_PANEL_KEYPAD
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#undef DEFAULT_KEYPAD_TYPE
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#define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD
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#endif
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#ifdef CONFIG_PANEL_LCD
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#undef DEFAULT_LCD_TYPE
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#define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD
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#endif
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#ifdef CONFIG_PANEL_LCD_HEIGHT
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#undef DEFAULT_LCD_HEIGHT
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#define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
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#endif
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#ifdef CONFIG_PANEL_LCD_WIDTH
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#undef DEFAULT_LCD_WIDTH
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#define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
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#endif
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#ifdef CONFIG_PANEL_LCD_BWIDTH
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#undef DEFAULT_LCD_BWIDTH
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#define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
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#endif
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#ifdef CONFIG_PANEL_LCD_HWIDTH
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#undef DEFAULT_LCD_HWIDTH
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#define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
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#endif
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#ifdef CONFIG_PANEL_LCD_CHARSET
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#undef DEFAULT_LCD_CHARSET
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#define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
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#endif
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#ifdef CONFIG_PANEL_LCD_PROTO
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#undef DEFAULT_LCD_PROTO
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#define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_E
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#undef DEFAULT_LCD_PIN_E
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#define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_RS
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#undef DEFAULT_LCD_PIN_RS
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#define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_RW
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#undef DEFAULT_LCD_PIN_RW
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#define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_SCL
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#undef DEFAULT_LCD_PIN_SCL
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#define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_SDA
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#undef DEFAULT_LCD_PIN_SDA
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#define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
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#endif
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#ifdef CONFIG_PANEL_LCD_PIN_BL
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#undef DEFAULT_LCD_PIN_BL
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#define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
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#endif
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#endif /* DEFAULT_PROFILE == 0 */
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/* global variables */
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/* Device single-open policy control */
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static atomic_t keypad_available = ATOMIC_INIT(1);
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static struct pardevice *pprt;
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static int keypad_initialized;
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static DEFINE_SPINLOCK(pprt_lock);
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static struct timer_list scan_timer;
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MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
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static int parport = DEFAULT_PARPORT;
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module_param(parport, int, 0000);
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MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)");
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static int profile = DEFAULT_PROFILE;
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module_param(profile, int, 0000);
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MODULE_PARM_DESC(profile,
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"1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
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"4=16x2 nexcom; default=40x2, old kp");
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static int keypad_type = NOT_SET;
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module_param(keypad_type, int, 0000);
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MODULE_PARM_DESC(keypad_type,
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"Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys");
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static int lcd_type = NOT_SET;
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module_param(lcd_type, int, 0000);
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MODULE_PARM_DESC(lcd_type,
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"LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
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static int lcd_height = NOT_SET;
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module_param(lcd_height, int, 0000);
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MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD");
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static int lcd_width = NOT_SET;
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module_param(lcd_width, int, 0000);
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MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD");
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static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */
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module_param(lcd_bwidth, int, 0000);
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MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)");
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static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */
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module_param(lcd_hwidth, int, 0000);
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MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)");
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static int lcd_charset = NOT_SET;
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module_param(lcd_charset, int, 0000);
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MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074");
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static int lcd_proto = NOT_SET;
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module_param(lcd_proto, int, 0000);
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MODULE_PARM_DESC(lcd_proto,
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"LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface");
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/*
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* These are the parallel port pins the LCD control signals are connected to.
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* Set this to 0 if the signal is not used. Set it to its opposite value
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* (negative) if the signal is negated. -MAXINT is used to indicate that the
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* pin has not been explicitly specified.
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*
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* WARNING! no check will be performed about collisions with keypad !
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*/
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static int lcd_e_pin = PIN_NOT_SET;
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module_param(lcd_e_pin, int, 0000);
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MODULE_PARM_DESC(lcd_e_pin,
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"# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
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static int lcd_rs_pin = PIN_NOT_SET;
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module_param(lcd_rs_pin, int, 0000);
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MODULE_PARM_DESC(lcd_rs_pin,
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"# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
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static int lcd_rw_pin = PIN_NOT_SET;
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module_param(lcd_rw_pin, int, 0000);
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MODULE_PARM_DESC(lcd_rw_pin,
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"# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
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static int lcd_cl_pin = PIN_NOT_SET;
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module_param(lcd_cl_pin, int, 0000);
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MODULE_PARM_DESC(lcd_cl_pin,
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|
"# 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;
|
|
/* 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;
|
|
/* fall through */
|
|
case INPUT_ST_HIGH:
|
|
if (input_state_high(input))
|
|
break;
|
|
/* fall through */
|
|
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 (lcd.enabled)
|
|
charlcd_unregister(lcd.charlcd);
|
|
err_unreg_device:
|
|
charlcd_free(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;
|
|
charlcd_free(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:
|
|
*/
|