mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
![Sean Young](/assets/img/avatar_default.png)
No timeout is generated by serial_ir since the port only generates interrupts on edges. Some IR protocols like rc6 and rc5 need a trailing space or timeout so they know there are no more bits coming. Without it, the current key will only be reported once some more IR occurs. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
866 lines
21 KiB
C
866 lines
21 KiB
C
/*
|
|
* serial_ir.c
|
|
*
|
|
* serial_ir - Device driver that records pulse- and pause-lengths
|
|
* (space-lengths) between DDCD event on a serial port.
|
|
*
|
|
* Copyright (C) 1996,97 Ralph Metzler <rjkm@thp.uni-koeln.de>
|
|
* Copyright (C) 1998 Trent Piepho <xyzzy@u.washington.edu>
|
|
* Copyright (C) 1998 Ben Pfaff <blp@gnu.org>
|
|
* Copyright (C) 1999 Christoph Bartelmus <lirc@bartelmus.de>
|
|
* Copyright (C) 2007 Andrei Tanas <andrei@tanas.ca> (suspend/resume support)
|
|
* Copyright (C) 2016 Sean Young <sean@mess.org> (port to rc-core)
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <linux/types.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/spinlock.h>
|
|
#include <media/rc-core.h>
|
|
|
|
struct serial_ir_hw {
|
|
int signal_pin;
|
|
int signal_pin_change;
|
|
u8 on;
|
|
u8 off;
|
|
unsigned set_send_carrier:1;
|
|
unsigned set_duty_cycle:1;
|
|
void (*send_pulse)(unsigned int length, ktime_t edge);
|
|
void (*send_space)(void);
|
|
spinlock_t lock;
|
|
};
|
|
|
|
#define IR_HOMEBREW 0
|
|
#define IR_IRDEO 1
|
|
#define IR_IRDEO_REMOTE 2
|
|
#define IR_ANIMAX 3
|
|
#define IR_IGOR 4
|
|
|
|
/* module parameters */
|
|
static int type;
|
|
static int io;
|
|
static int irq;
|
|
static bool iommap;
|
|
static int ioshift;
|
|
static bool softcarrier = true;
|
|
static bool share_irq;
|
|
static int sense = -1; /* -1 = auto, 0 = active high, 1 = active low */
|
|
static bool txsense; /* 0 = active high, 1 = active low */
|
|
|
|
/* forward declarations */
|
|
static void send_pulse_irdeo(unsigned int length, ktime_t edge);
|
|
static void send_space_irdeo(void);
|
|
#ifdef CONFIG_IR_SERIAL_TRANSMITTER
|
|
static void send_pulse_homebrew(unsigned int length, ktime_t edge);
|
|
static void send_space_homebrew(void);
|
|
#endif
|
|
|
|
static struct serial_ir_hw hardware[] = {
|
|
[IR_HOMEBREW] = {
|
|
.lock = __SPIN_LOCK_UNLOCKED(hardware[IR_HOMEBREW].lock),
|
|
.signal_pin = UART_MSR_DCD,
|
|
.signal_pin_change = UART_MSR_DDCD,
|
|
.on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),
|
|
.off = (UART_MCR_RTS | UART_MCR_OUT2),
|
|
#ifdef CONFIG_IR_SERIAL_TRANSMITTER
|
|
.send_pulse = send_pulse_homebrew,
|
|
.send_space = send_space_homebrew,
|
|
.set_send_carrier = true,
|
|
.set_duty_cycle = true,
|
|
#endif
|
|
},
|
|
|
|
[IR_IRDEO] = {
|
|
.lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO].lock),
|
|
.signal_pin = UART_MSR_DSR,
|
|
.signal_pin_change = UART_MSR_DDSR,
|
|
.on = UART_MCR_OUT2,
|
|
.off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
|
|
.send_pulse = send_pulse_irdeo,
|
|
.send_space = send_space_irdeo,
|
|
.set_duty_cycle = true,
|
|
},
|
|
|
|
[IR_IRDEO_REMOTE] = {
|
|
.lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO_REMOTE].lock),
|
|
.signal_pin = UART_MSR_DSR,
|
|
.signal_pin_change = UART_MSR_DDSR,
|
|
.on = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
|
|
.off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
|
|
.send_pulse = send_pulse_irdeo,
|
|
.send_space = send_space_irdeo,
|
|
.set_duty_cycle = true,
|
|
},
|
|
|
|
[IR_ANIMAX] = {
|
|
.lock = __SPIN_LOCK_UNLOCKED(hardware[IR_ANIMAX].lock),
|
|
.signal_pin = UART_MSR_DCD,
|
|
.signal_pin_change = UART_MSR_DDCD,
|
|
.on = 0,
|
|
.off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
|
|
},
|
|
|
|
[IR_IGOR] = {
|
|
.lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IGOR].lock),
|
|
.signal_pin = UART_MSR_DSR,
|
|
.signal_pin_change = UART_MSR_DDSR,
|
|
.on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),
|
|
.off = (UART_MCR_RTS | UART_MCR_OUT2),
|
|
#ifdef CONFIG_IR_SERIAL_TRANSMITTER
|
|
.send_pulse = send_pulse_homebrew,
|
|
.send_space = send_space_homebrew,
|
|
.set_send_carrier = true,
|
|
.set_duty_cycle = true,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
#define RS_ISR_PASS_LIMIT 256
|
|
|
|
struct serial_ir {
|
|
ktime_t lastkt;
|
|
struct rc_dev *rcdev;
|
|
struct platform_device *pdev;
|
|
struct timer_list timeout_timer;
|
|
|
|
unsigned int freq;
|
|
unsigned int duty_cycle;
|
|
|
|
unsigned int pulse_width, space_width;
|
|
};
|
|
|
|
static struct serial_ir serial_ir;
|
|
|
|
/* fetch serial input packet (1 byte) from register offset */
|
|
static u8 sinp(int offset)
|
|
{
|
|
if (iommap)
|
|
/* the register is memory-mapped */
|
|
offset <<= ioshift;
|
|
|
|
return inb(io + offset);
|
|
}
|
|
|
|
/* write serial output packet (1 byte) of value to register offset */
|
|
static void soutp(int offset, u8 value)
|
|
{
|
|
if (iommap)
|
|
/* the register is memory-mapped */
|
|
offset <<= ioshift;
|
|
|
|
outb(value, io + offset);
|
|
}
|
|
|
|
static void on(void)
|
|
{
|
|
if (txsense)
|
|
soutp(UART_MCR, hardware[type].off);
|
|
else
|
|
soutp(UART_MCR, hardware[type].on);
|
|
}
|
|
|
|
static void off(void)
|
|
{
|
|
if (txsense)
|
|
soutp(UART_MCR, hardware[type].on);
|
|
else
|
|
soutp(UART_MCR, hardware[type].off);
|
|
}
|
|
|
|
static void init_timing_params(unsigned int new_duty_cycle,
|
|
unsigned int new_freq)
|
|
{
|
|
serial_ir.duty_cycle = new_duty_cycle;
|
|
serial_ir.freq = new_freq;
|
|
|
|
serial_ir.pulse_width = DIV_ROUND_CLOSEST(
|
|
new_duty_cycle * NSEC_PER_SEC, new_freq * 100l);
|
|
serial_ir.space_width = DIV_ROUND_CLOSEST(
|
|
(100l - new_duty_cycle) * NSEC_PER_SEC, new_freq * 100l);
|
|
}
|
|
|
|
static void send_pulse_irdeo(unsigned int length, ktime_t target)
|
|
{
|
|
long rawbits;
|
|
int i;
|
|
unsigned char output;
|
|
unsigned char chunk, shifted;
|
|
|
|
/* how many bits have to be sent ? */
|
|
rawbits = length * 1152 / 10000;
|
|
if (serial_ir.duty_cycle > 50)
|
|
chunk = 3;
|
|
else
|
|
chunk = 1;
|
|
for (i = 0, output = 0x7f; rawbits > 0; rawbits -= 3) {
|
|
shifted = chunk << (i * 3);
|
|
shifted >>= 1;
|
|
output &= (~shifted);
|
|
i++;
|
|
if (i == 3) {
|
|
soutp(UART_TX, output);
|
|
while (!(sinp(UART_LSR) & UART_LSR_THRE))
|
|
;
|
|
output = 0x7f;
|
|
i = 0;
|
|
}
|
|
}
|
|
if (i != 0) {
|
|
soutp(UART_TX, output);
|
|
while (!(sinp(UART_LSR) & UART_LSR_TEMT))
|
|
;
|
|
}
|
|
}
|
|
|
|
static void send_space_irdeo(void)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_IR_SERIAL_TRANSMITTER
|
|
static void send_pulse_homebrew_softcarrier(unsigned int length, ktime_t edge)
|
|
{
|
|
ktime_t now, target = ktime_add_us(edge, length);
|
|
/*
|
|
* delta should never exceed 4 seconds and on m68k
|
|
* ndelay(s64) does not compile; so use s32 rather than s64.
|
|
*/
|
|
s32 delta;
|
|
|
|
for (;;) {
|
|
now = ktime_get();
|
|
if (ktime_compare(now, target) >= 0)
|
|
break;
|
|
on();
|
|
edge = ktime_add_ns(edge, serial_ir.pulse_width);
|
|
delta = ktime_to_ns(ktime_sub(edge, now));
|
|
if (delta > 0)
|
|
ndelay(delta);
|
|
now = ktime_get();
|
|
off();
|
|
if (ktime_compare(now, target) >= 0)
|
|
break;
|
|
edge = ktime_add_ns(edge, serial_ir.space_width);
|
|
delta = ktime_to_ns(ktime_sub(edge, now));
|
|
if (delta > 0)
|
|
ndelay(delta);
|
|
}
|
|
}
|
|
|
|
static void send_pulse_homebrew(unsigned int length, ktime_t edge)
|
|
{
|
|
if (softcarrier)
|
|
send_pulse_homebrew_softcarrier(length, edge);
|
|
else
|
|
on();
|
|
}
|
|
|
|
static void send_space_homebrew(void)
|
|
{
|
|
off();
|
|
}
|
|
#endif
|
|
|
|
static void frbwrite(unsigned int l, bool is_pulse)
|
|
{
|
|
/* simple noise filter */
|
|
static unsigned int ptr, pulse, space;
|
|
DEFINE_IR_RAW_EVENT(ev);
|
|
|
|
if (ptr > 0 && is_pulse) {
|
|
pulse += l;
|
|
if (pulse > 250000) {
|
|
ev.duration = space;
|
|
ev.pulse = false;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
ev.duration = pulse;
|
|
ev.pulse = true;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
ptr = 0;
|
|
pulse = 0;
|
|
}
|
|
return;
|
|
}
|
|
if (!is_pulse) {
|
|
if (ptr == 0) {
|
|
if (l > 20000000) {
|
|
space = l;
|
|
ptr++;
|
|
return;
|
|
}
|
|
} else {
|
|
if (l > 20000000) {
|
|
space += pulse;
|
|
if (space > IR_MAX_DURATION)
|
|
space = IR_MAX_DURATION;
|
|
space += l;
|
|
if (space > IR_MAX_DURATION)
|
|
space = IR_MAX_DURATION;
|
|
pulse = 0;
|
|
return;
|
|
}
|
|
|
|
ev.duration = space;
|
|
ev.pulse = false;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
ev.duration = pulse;
|
|
ev.pulse = true;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
ptr = 0;
|
|
pulse = 0;
|
|
}
|
|
}
|
|
|
|
ev.duration = l;
|
|
ev.pulse = is_pulse;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
}
|
|
|
|
static irqreturn_t serial_ir_irq_handler(int i, void *blah)
|
|
{
|
|
ktime_t kt;
|
|
int counter, dcd;
|
|
u8 status;
|
|
ktime_t delkt;
|
|
unsigned int data;
|
|
static int last_dcd = -1;
|
|
|
|
if ((sinp(UART_IIR) & UART_IIR_NO_INT)) {
|
|
/* not our interrupt */
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
counter = 0;
|
|
do {
|
|
counter++;
|
|
status = sinp(UART_MSR);
|
|
if (counter > RS_ISR_PASS_LIMIT) {
|
|
dev_err(&serial_ir.pdev->dev, "Trapped in interrupt");
|
|
break;
|
|
}
|
|
if ((status & hardware[type].signal_pin_change) &&
|
|
sense != -1) {
|
|
/* get current time */
|
|
kt = ktime_get();
|
|
|
|
/*
|
|
* The driver needs to know if your receiver is
|
|
* active high or active low, or the space/pulse
|
|
* sense could be inverted.
|
|
*/
|
|
|
|
/* calc time since last interrupt in nanoseconds */
|
|
dcd = (status & hardware[type].signal_pin) ? 1 : 0;
|
|
|
|
if (dcd == last_dcd) {
|
|
dev_err(&serial_ir.pdev->dev,
|
|
"ignoring spike: %d %d %lldns %lldns\n",
|
|
dcd, sense, ktime_to_ns(kt),
|
|
ktime_to_ns(serial_ir.lastkt));
|
|
continue;
|
|
}
|
|
|
|
delkt = ktime_sub(kt, serial_ir.lastkt);
|
|
if (ktime_compare(delkt, ktime_set(15, 0)) > 0) {
|
|
data = IR_MAX_DURATION; /* really long time */
|
|
if (!(dcd ^ sense)) {
|
|
/* sanity check */
|
|
dev_err(&serial_ir.pdev->dev,
|
|
"dcd unexpected: %d %d %lldns %lldns\n",
|
|
dcd, sense, ktime_to_ns(kt),
|
|
ktime_to_ns(serial_ir.lastkt));
|
|
/*
|
|
* detecting pulse while this
|
|
* MUST be a space!
|
|
*/
|
|
sense = sense ? 0 : 1;
|
|
}
|
|
} else {
|
|
data = ktime_to_ns(delkt);
|
|
}
|
|
frbwrite(data, !(dcd ^ sense));
|
|
serial_ir.lastkt = kt;
|
|
last_dcd = dcd;
|
|
}
|
|
} while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */
|
|
|
|
mod_timer(&serial_ir.timeout_timer,
|
|
jiffies + nsecs_to_jiffies(serial_ir.rcdev->timeout));
|
|
|
|
ir_raw_event_handle(serial_ir.rcdev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int hardware_init_port(void)
|
|
{
|
|
u8 scratch, scratch2, scratch3;
|
|
|
|
/*
|
|
* This is a simple port existence test, borrowed from the autoconfig
|
|
* function in drivers/tty/serial/8250/8250_port.c
|
|
*/
|
|
scratch = sinp(UART_IER);
|
|
soutp(UART_IER, 0);
|
|
#ifdef __i386__
|
|
outb(0xff, 0x080);
|
|
#endif
|
|
scratch2 = sinp(UART_IER) & 0x0f;
|
|
soutp(UART_IER, 0x0f);
|
|
#ifdef __i386__
|
|
outb(0x00, 0x080);
|
|
#endif
|
|
scratch3 = sinp(UART_IER) & 0x0f;
|
|
soutp(UART_IER, scratch);
|
|
if (scratch2 != 0 || scratch3 != 0x0f) {
|
|
/* we fail, there's nothing here */
|
|
pr_err("port existence test failed, cannot continue\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Set DLAB 0. */
|
|
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
|
|
|
|
/* First of all, disable all interrupts */
|
|
soutp(UART_IER, sinp(UART_IER) &
|
|
(~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
|
|
|
|
/* Clear registers. */
|
|
sinp(UART_LSR);
|
|
sinp(UART_RX);
|
|
sinp(UART_IIR);
|
|
sinp(UART_MSR);
|
|
|
|
/* Set line for power source */
|
|
off();
|
|
|
|
/* Clear registers again to be sure. */
|
|
sinp(UART_LSR);
|
|
sinp(UART_RX);
|
|
sinp(UART_IIR);
|
|
sinp(UART_MSR);
|
|
|
|
switch (type) {
|
|
case IR_IRDEO:
|
|
case IR_IRDEO_REMOTE:
|
|
/* setup port to 7N1 @ 115200 Baud */
|
|
/* 7N1+start = 9 bits at 115200 ~ 3 bits at 38kHz */
|
|
|
|
/* Set DLAB 1. */
|
|
soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
|
|
/* Set divisor to 1 => 115200 Baud */
|
|
soutp(UART_DLM, 0);
|
|
soutp(UART_DLL, 1);
|
|
/* Set DLAB 0 + 7N1 */
|
|
soutp(UART_LCR, UART_LCR_WLEN7);
|
|
/* THR interrupt already disabled at this point */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void serial_ir_timeout(unsigned long arg)
|
|
{
|
|
DEFINE_IR_RAW_EVENT(ev);
|
|
|
|
ev.timeout = true;
|
|
ev.duration = serial_ir.rcdev->timeout;
|
|
ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
|
|
ir_raw_event_handle(serial_ir.rcdev);
|
|
}
|
|
|
|
static int serial_ir_probe(struct platform_device *dev)
|
|
{
|
|
int i, nlow, nhigh, result;
|
|
|
|
result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler,
|
|
share_irq ? IRQF_SHARED : 0,
|
|
KBUILD_MODNAME, &hardware);
|
|
if (result < 0) {
|
|
if (result == -EBUSY)
|
|
dev_err(&dev->dev, "IRQ %d busy\n", irq);
|
|
else if (result == -EINVAL)
|
|
dev_err(&dev->dev, "Bad irq number or handler\n");
|
|
return result;
|
|
}
|
|
|
|
/* Reserve io region. */
|
|
if ((iommap &&
|
|
(devm_request_mem_region(&dev->dev, iommap, 8 << ioshift,
|
|
KBUILD_MODNAME) == NULL)) ||
|
|
(!iommap && (devm_request_region(&dev->dev, io, 8,
|
|
KBUILD_MODNAME) == NULL))) {
|
|
dev_err(&dev->dev, "port %04x already in use\n", io);
|
|
dev_warn(&dev->dev, "use 'setserial /dev/ttySX uart none'\n");
|
|
dev_warn(&dev->dev,
|
|
"or compile the serial port driver as module and\n");
|
|
dev_warn(&dev->dev, "make sure this module is loaded first\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
setup_timer(&serial_ir.timeout_timer, serial_ir_timeout,
|
|
(unsigned long)&serial_ir);
|
|
|
|
result = hardware_init_port();
|
|
if (result < 0)
|
|
return result;
|
|
|
|
/* Initialize pulse/space widths */
|
|
init_timing_params(50, 38000);
|
|
|
|
/* If pin is high, then this must be an active low receiver. */
|
|
if (sense == -1) {
|
|
/* wait 1/2 sec for the power supply */
|
|
msleep(500);
|
|
|
|
/*
|
|
* probe 9 times every 0.04s, collect "votes" for
|
|
* active high/low
|
|
*/
|
|
nlow = 0;
|
|
nhigh = 0;
|
|
for (i = 0; i < 9; i++) {
|
|
if (sinp(UART_MSR) & hardware[type].signal_pin)
|
|
nlow++;
|
|
else
|
|
nhigh++;
|
|
msleep(40);
|
|
}
|
|
sense = nlow >= nhigh ? 1 : 0;
|
|
dev_info(&dev->dev, "auto-detected active %s receiver\n",
|
|
sense ? "low" : "high");
|
|
} else
|
|
dev_info(&dev->dev, "Manually using active %s receiver\n",
|
|
sense ? "low" : "high");
|
|
|
|
dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io);
|
|
return 0;
|
|
}
|
|
|
|
static int serial_ir_open(struct rc_dev *rcdev)
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* initialize timestamp */
|
|
serial_ir.lastkt = ktime_get();
|
|
|
|
spin_lock_irqsave(&hardware[type].lock, flags);
|
|
|
|
/* Set DLAB 0. */
|
|
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
|
|
|
|
soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);
|
|
|
|
spin_unlock_irqrestore(&hardware[type].lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void serial_ir_close(struct rc_dev *rcdev)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&hardware[type].lock, flags);
|
|
|
|
/* Set DLAB 0. */
|
|
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
|
|
|
|
/* First of all, disable all interrupts */
|
|
soutp(UART_IER, sinp(UART_IER) &
|
|
(~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
|
|
spin_unlock_irqrestore(&hardware[type].lock, flags);
|
|
}
|
|
|
|
static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
|
|
unsigned int count)
|
|
{
|
|
unsigned long flags;
|
|
ktime_t edge;
|
|
s64 delta;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&hardware[type].lock, flags);
|
|
if (type == IR_IRDEO) {
|
|
/* DTR, RTS down */
|
|
on();
|
|
}
|
|
|
|
edge = ktime_get();
|
|
for (i = 0; i < count; i++) {
|
|
if (i % 2)
|
|
hardware[type].send_space();
|
|
else
|
|
hardware[type].send_pulse(txbuf[i], edge);
|
|
|
|
edge = ktime_add_us(edge, txbuf[i]);
|
|
delta = ktime_us_delta(edge, ktime_get());
|
|
if (delta > 25) {
|
|
spin_unlock_irqrestore(&hardware[type].lock, flags);
|
|
usleep_range(delta - 25, delta + 25);
|
|
spin_lock_irqsave(&hardware[type].lock, flags);
|
|
} else if (delta > 0) {
|
|
udelay(delta);
|
|
}
|
|
}
|
|
off();
|
|
spin_unlock_irqrestore(&hardware[type].lock, flags);
|
|
return count;
|
|
}
|
|
|
|
static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle)
|
|
{
|
|
init_timing_params(cycle, serial_ir.freq);
|
|
return 0;
|
|
}
|
|
|
|
static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier)
|
|
{
|
|
if (carrier > 500000 || carrier < 20000)
|
|
return -EINVAL;
|
|
|
|
init_timing_params(serial_ir.duty_cycle, carrier);
|
|
return 0;
|
|
}
|
|
|
|
static int serial_ir_suspend(struct platform_device *dev,
|
|
pm_message_t state)
|
|
{
|
|
/* Set DLAB 0. */
|
|
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
|
|
|
|
/* Disable all interrupts */
|
|
soutp(UART_IER, sinp(UART_IER) &
|
|
(~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
|
|
|
|
/* Clear registers. */
|
|
sinp(UART_LSR);
|
|
sinp(UART_RX);
|
|
sinp(UART_IIR);
|
|
sinp(UART_MSR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int serial_ir_resume(struct platform_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
int result;
|
|
|
|
result = hardware_init_port();
|
|
if (result < 0)
|
|
return result;
|
|
|
|
spin_lock_irqsave(&hardware[type].lock, flags);
|
|
/* Enable Interrupt */
|
|
serial_ir.lastkt = ktime_get();
|
|
soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);
|
|
off();
|
|
|
|
spin_unlock_irqrestore(&hardware[type].lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver serial_ir_driver = {
|
|
.probe = serial_ir_probe,
|
|
.suspend = serial_ir_suspend,
|
|
.resume = serial_ir_resume,
|
|
.driver = {
|
|
.name = "serial_ir",
|
|
},
|
|
};
|
|
|
|
static int __init serial_ir_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = platform_driver_register(&serial_ir_driver);
|
|
if (result)
|
|
return result;
|
|
|
|
serial_ir.pdev = platform_device_alloc("serial_ir", 0);
|
|
if (!serial_ir.pdev) {
|
|
result = -ENOMEM;
|
|
goto exit_driver_unregister;
|
|
}
|
|
|
|
result = platform_device_add(serial_ir.pdev);
|
|
if (result)
|
|
goto exit_device_put;
|
|
|
|
return 0;
|
|
|
|
exit_device_put:
|
|
platform_device_put(serial_ir.pdev);
|
|
exit_driver_unregister:
|
|
platform_driver_unregister(&serial_ir_driver);
|
|
return result;
|
|
}
|
|
|
|
static void serial_ir_exit(void)
|
|
{
|
|
platform_device_unregister(serial_ir.pdev);
|
|
platform_driver_unregister(&serial_ir_driver);
|
|
}
|
|
|
|
static int __init serial_ir_init_module(void)
|
|
{
|
|
struct rc_dev *rcdev;
|
|
int result;
|
|
|
|
switch (type) {
|
|
case IR_HOMEBREW:
|
|
case IR_IRDEO:
|
|
case IR_IRDEO_REMOTE:
|
|
case IR_ANIMAX:
|
|
case IR_IGOR:
|
|
/* if nothing specified, use ttyS0/com1 and irq 4 */
|
|
io = io ? io : 0x3f8;
|
|
irq = irq ? irq : 4;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (!softcarrier) {
|
|
switch (type) {
|
|
case IR_HOMEBREW:
|
|
case IR_IGOR:
|
|
hardware[type].set_send_carrier = false;
|
|
hardware[type].set_duty_cycle = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* make sure sense is either -1, 0, or 1 */
|
|
if (sense != -1)
|
|
sense = !!sense;
|
|
|
|
result = serial_ir_init();
|
|
if (result)
|
|
return result;
|
|
|
|
rcdev = devm_rc_allocate_device(&serial_ir.pdev->dev);
|
|
if (!rcdev) {
|
|
result = -ENOMEM;
|
|
goto serial_cleanup;
|
|
}
|
|
|
|
if (hardware[type].send_pulse && hardware[type].send_space)
|
|
rcdev->tx_ir = serial_ir_tx;
|
|
if (hardware[type].set_send_carrier)
|
|
rcdev->s_tx_carrier = serial_ir_tx_carrier;
|
|
if (hardware[type].set_duty_cycle)
|
|
rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle;
|
|
|
|
switch (type) {
|
|
case IR_HOMEBREW:
|
|
rcdev->input_name = "Serial IR type home-brew";
|
|
break;
|
|
case IR_IRDEO:
|
|
rcdev->input_name = "Serial IR type IRdeo";
|
|
break;
|
|
case IR_IRDEO_REMOTE:
|
|
rcdev->input_name = "Serial IR type IRdeo remote";
|
|
break;
|
|
case IR_ANIMAX:
|
|
rcdev->input_name = "Serial IR type AnimaX";
|
|
break;
|
|
case IR_IGOR:
|
|
rcdev->input_name = "Serial IR type IgorPlug";
|
|
break;
|
|
}
|
|
|
|
rcdev->input_phys = KBUILD_MODNAME "/input0";
|
|
rcdev->input_id.bustype = BUS_HOST;
|
|
rcdev->input_id.vendor = 0x0001;
|
|
rcdev->input_id.product = 0x0001;
|
|
rcdev->input_id.version = 0x0100;
|
|
rcdev->open = serial_ir_open;
|
|
rcdev->close = serial_ir_close;
|
|
rcdev->dev.parent = &serial_ir.pdev->dev;
|
|
rcdev->driver_type = RC_DRIVER_IR_RAW;
|
|
rcdev->allowed_protocols = RC_BIT_ALL;
|
|
rcdev->driver_name = KBUILD_MODNAME;
|
|
rcdev->map_name = RC_MAP_RC6_MCE;
|
|
rcdev->min_timeout = 1;
|
|
rcdev->timeout = IR_DEFAULT_TIMEOUT;
|
|
rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
|
|
rcdev->rx_resolution = 250000;
|
|
|
|
serial_ir.rcdev = rcdev;
|
|
|
|
result = rc_register_device(rcdev);
|
|
|
|
if (!result)
|
|
return 0;
|
|
serial_cleanup:
|
|
serial_ir_exit();
|
|
return result;
|
|
}
|
|
|
|
static void __exit serial_ir_exit_module(void)
|
|
{
|
|
del_timer_sync(&serial_ir.timeout_timer);
|
|
rc_unregister_device(serial_ir.rcdev);
|
|
serial_ir_exit();
|
|
}
|
|
|
|
module_init(serial_ir_init_module);
|
|
module_exit(serial_ir_exit_module);
|
|
|
|
MODULE_DESCRIPTION("Infra-red receiver driver for serial ports.");
|
|
MODULE_AUTHOR("Ralph Metzler, Trent Piepho, Ben Pfaff, Christoph Bartelmus, Andrei Tanas");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(type, int, 0444);
|
|
MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo, 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug");
|
|
|
|
module_param(io, int, 0444);
|
|
MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
|
|
|
|
/* some architectures (e.g. intel xscale) have memory mapped registers */
|
|
module_param(iommap, bool, 0444);
|
|
MODULE_PARM_DESC(iommap, "physical base for memory mapped I/O (0 = no memory mapped io)");
|
|
|
|
/*
|
|
* some architectures (e.g. intel xscale) align the 8bit serial registers
|
|
* on 32bit word boundaries.
|
|
* See linux-kernel/drivers/tty/serial/8250/8250.c serial_in()/out()
|
|
*/
|
|
module_param(ioshift, int, 0444);
|
|
MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)");
|
|
|
|
module_param(irq, int, 0444);
|
|
MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
|
|
|
|
module_param(share_irq, bool, 0444);
|
|
MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)");
|
|
|
|
module_param(sense, int, 0444);
|
|
MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit (0 = active high, 1 = active low )");
|
|
|
|
#ifdef CONFIG_IR_SERIAL_TRANSMITTER
|
|
module_param(txsense, bool, 0444);
|
|
MODULE_PARM_DESC(txsense, "Sense of transmitter circuit (0 = active high, 1 = active low )");
|
|
#endif
|
|
|
|
module_param(softcarrier, bool, 0444);
|
|
MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
|