Tested with a homebrew serial ir.
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
MAINTAINERS | 6 +
drivers/media/rc/Kconfig | 17 +
drivers/media/rc/Makefile | 1 +
drivers/media/rc/serial_ir.c | 1025 +++++++++++++++++++++++++++
drivers/staging/media/lirc/Kconfig | 13 -
drivers/staging/media/lirc/Makefile | 1 -
drivers/staging/media/lirc/lirc_serial.c | 1130 ------------------------------
7 files changed, 1049 insertions(+), 1144 deletions(-)
create mode 100644 drivers/media/rc/serial_ir.c
delete mode 100644 drivers/staging/media/lirc/lirc_serial.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 93e9f42..cd8fd50 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10604,6 +10604,12 @@ S: Maintained
F: Documentation/devicetree/bindings/serial/
F: drivers/tty/serial/
+SERIAL IR RECEIVER
+M: Sean Young <sean@xxxxxxxx>
+L: linux-media@xxxxxxxxxxxxxxx
+S: Maintained
+F: drivers/media/rc/serial_ir.c
+
STI CEC DRIVER
M: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
L: kernel@xxxxxxxxxxx
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 370e16e..629e8ca 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -389,4 +389,21 @@ config IR_SUNXI
To compile this driver as a module, choose M here: the module will
be called sunxi-ir.
+config IR_SERIAL
+ tristate "Homebrew Serial Port Receiver"
+ depends on RC_CORE
+ ---help---
+ Say Y if you want to use Homebrew Serial Port Receivers and
+ Transceivers.
+
+ To compile this driver as a module, choose M here: the module will
+ be called serial-ir.
+
+config IR_SERIAL_TRANSMITTER
+ bool "Serial Port Transmitter"
+ default y
+ depends on IR_SERIAL
+ ---help---
+ Serial Port Transmitter support
+
endif #RC_DEVICES
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 379a5c0..3a984ee 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -37,3 +37,4 @@ obj-$(CONFIG_IR_TTUSBIR) += ttusbir.o
obj-$(CONFIG_RC_ST) += st_rc.o
obj-$(CONFIG_IR_SUNXI) += sunxi-cir.o
obj-$(CONFIG_IR_IMG) += img-ir/
+obj-$(CONFIG_IR_SERIAL) += serial_ir.o
diff --git a/drivers/media/rc/serial_ir.c b/drivers/media/rc/serial_ir.c
new file mode 100644
index 0000000..32db2b7
--- /dev/null
+++ b/drivers/media/rc/serial_ir.c
@@ -0,0 +1,1025 @@
+/*
+ * 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@xxxxxxxxxxxxxxxx>
+ * Copyright (C) 1998 Trent Piepho <xyzzy@xxxxxxxxxxxxxxxx>
+ * Copyright (C) 1998 Ben Pfaff <blp@xxxxxxx>
+ * Copyright (C) 1999 Christoph Bartelmus <lirc@xxxxxxxxxxxx>
+ * Copyright (C) 2007 Andrei Tanas <andrei@xxxxxxxx> (suspend/resume support)
+ * Copyright (C) 2016 Sean Young <sean@xxxxxxxx> (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.
+ */
+
+/*
+ * Steve's changes to improve transmission fidelity:
+ * - for systems with the rdtsc instruction and the clock counter, a
+ * send_pule that times the pulses directly using the counter.
+ * This means that the IR_SERIAL_TRANSMITTER_LATENCY fudge is
+ * not needed. Measurement shows very stable waveform, even where
+ * PCI activity slows the access to the UART, which trips up other
+ * versions.
+ * - For other system, non-integer-microsecond pulse/space lengths,
+ * done using fixed point binary. So, much more accurate carrier
+ * frequency.
+ * - fine tuned transmitter latency, taking advantage of fractional
+ * microseconds in previous change
+ * - Fixed bug in the way transmitter latency was accounted for by
+ * tuning the pulse lengths down - the send_pulse routine ignored
+ * this overhead as it timed the overall pulse length - so the
+ * pulse frequency was right but overall pulse length was too
+ * long. Fixed by accounting for latency on each pulse/space
+ * iteration.
+ *
+ * Steve Davies <steve@xxxxxxxxxxxxx> July 2001
+ */
+
+#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>
+
+#define DRIVER_NAME "serial_ir"
+
+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;
+ long (*send_pulse)(unsigned long length);
+ void (*send_space)(long length);
+ spinlock_t lock;
+};
+
+#define IR_HOMEBREW 0
+#define IR_IRDEO 1
+#define IR_IRDEO_REMOTE 2
+#define IR_ANIMAX 3
+#define IR_IGOR 4
+#define IR_NSLU2 5
+
+/*** 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 long send_pulse_irdeo(unsigned long length);
+static void send_space_irdeo(long length);
+#ifdef CONFIG_IR_SERIAL_TRANSMITTER
+static long send_pulse_homebrew(unsigned long length);
+static void send_space_homebrew(long length);
+#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),
+ .send_pulse = NULL,
+ .send_space = NULL,
+ },
+
+ [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
+
+/*
+ * A long pulse code from a remote might take up to 300 bytes. The
+ * daemon should read the bytes as soon as they are generated, so take
+ * the number of keys you think you can push before the daemon runs
+ * and multiply by 300. The driver will warn you if you overrun this
+ * buffer. If you have a slow computer or non-busmastering IDE disks,
+ * maybe you will need to increase this.
+ */
+
+/* This MUST be a power of two! It has to be larger than 1 as well. */
+
+struct serial_ir {
+ ktime_t lastkt;
+ struct rc_dev *rcdev;
+ struct platform_device *pdev;
+
+ unsigned int freq;
+ unsigned int duty_cycle;
+
+ unsigned long period;
+ unsigned long pulse_width, space_width;
+};
+
+static struct serial_ir serial_ir;
+
+#if defined(__i386__)
+/*
+ * From:
+ * Linux I/O port programming mini-HOWTO
+ * Author: Riku Saikkonen <Riku.Saikkonen@xxxxxx>
+ * v, 28 December 1997
+ *
+ * [...]
+ * Actually, a port I/O instruction on most ports in the 0-0x3ff range
+ * takes almost exactly 1 microsecond, so if you're, for example, using
+ * the parallel port directly, just do additional inb()s from that port
+ * to delay.
+ * [...]
+ */
+/* transmitter latency 1.5625us 0x1.90 - this figure arrived at from
+ * comment above plus trimming to match actual measured frequency.
+ * This will be sensitive to cpu speed, though hopefully most of the 1.5us
+ * is spent in the uart access. Still - for reference test machine was a
+ * 1.13GHz Athlon system - Steve
+ */
+
+/*
+ * changed from 400 to 450 as this works better on slower machines;
+ * faster machines will use the rdtsc code anyway
+ */
+#define IR_SERIAL_TRANSMITTER_LATENCY 450
+
+#else
+
+/* does anybody have information on other platforms ? */
+/* 256 = 1<<8 */
+#define IR_SERIAL_TRANSMITTER_LATENCY 256
+
+#endif /* __i386__ */
+/*
+ * FIXME: should we be using hrtimers instead of this
+ * IR_SERIAL_TRANSMITTER_LATENCY nonsense?
+ */
+
+/* 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);
+}
+
+#ifndef MAX_UDELAY_MS
+#define MAX_UDELAY_US 5000
+#else
+#define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
+#endif
+
+static void safe_udelay(unsigned long usecs)
+{
+ while (usecs > MAX_UDELAY_US) {
+ udelay(MAX_UDELAY_US);
+ usecs -= MAX_UDELAY_US;
+ }
+ udelay(usecs);
+}
+
+#ifdef USE_RDTSC
+/*
+ * This is an overflow/precision juggle, complicated in that we can't
+ * do long long divide in the kernel
+ */
+
+/*
+ * When we use the rdtsc instruction to measure clocks, we keep the
+ * pulse and space widths as clock cycles. As this is CPU speed
+ * dependent, the widths must be calculated in init_port and ioctl
+ * time
+ */
+
+static int init_timing_params(unsigned int new_duty_cycle,
+ unsigned int new_freq)
+{
+ __u64 loops_per_sec, work;
+
+ serial_ir.duty_cycle = new_duty_cycle;
+ serial_ir.freq = new_freq;
+
+ loops_per_sec = __this_cpu_read(cpu.info.loops_per_jiffy);
+ loops_per_sec *= HZ;
+
+ /* How many clocks in a microsecond?, avoiding long long divide */
+ work = loops_per_sec;
+ work *= 4295; /* 4295 = 2^32 / 1e6 */
+
+ /*
+ * Carrier period in clocks, approach good up to 32GHz clock,
+ * gets carrier frequency within 8Hz
+ */
+ serial_ir.period = loops_per_sec >> 3;
+ serial_ir.pperiod /= (freq >> 3);
+
+ /* Derive pulse and space from the period */
+ serial_ir.ppulse_width = serial_ir.period * serial.ir.duty_cycle / 100;
+ serial_ir.pspace_width = serial_ir.period - serial_ir.pulse_width;
+ pr_debug("in init_timing_params, freq=%d, duty_cycle=%d, clk/jiffy=%ld, pulse=%ld, space=%ld, conv_us_to_clocks=%ld\n",
+ freq, duty_cycle, __this_cpu_read(cpu_info.loops_per_jiffy),
+ pulse_width, space_width, conv_us_to_clocks);
+ return 0;
+}
+#else /* ! USE_RDTSC */
+static int init_timing_params(unsigned int new_duty_cycle,
+ unsigned int new_freq)
+{
+/*
+ * period, pulse/space width are kept with 8 binary places -
+ * IE multiplied by 256.
+ */
+ if (256 * 1000000L / new_freq * new_duty_cycle / 100 <=
+ IR_SERIAL_TRANSMITTER_LATENCY)
+ return -EINVAL;
+ if (256 * 1000000L / new_freq * (100 - new_duty_cycle) / 100 <=
+ IR_SERIAL_TRANSMITTER_LATENCY)
+ return -EINVAL;
+ serial_ir.duty_cycle = new_duty_cycle;
+ serial_ir.freq = new_freq;
+ serial_ir.period = 256 * 1000000L / serial_ir.freq;
+ serial_ir.pulse_width = serial_ir.period * serial_ir.duty_cycle / 100;
+ serial_ir.space_width = serial_ir.period - serial_ir.pulse_width;
+ pr_debug("in init_timing_params, freq=%d pulse=%ld, space=%ld\n",
+ serial_ir.freq, serial_ir.pulse_width,
+ serial_ir.space_width);
+ return 0;
+}
+#endif /* USE_RDTSC */
+
+
+/* return value: space length delta */
+
+static long send_pulse_irdeo(unsigned long length)
+{
+ long rawbits, ret;
+ 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))
+ ;
+ }
+
+ if (i == 0)
+ ret = (-rawbits) * 10000 / 1152;
+ else
+ ret = (3 - i) * 3 * 10000 / 1152 + (-rawbits) * 10000 / 1152;
+
+ return ret;
+}
+
+/* Version using udelay() */
+
+/*
+ * here we use fixed point arithmetic, with 8
+ * fractional bits. that gets us within 0.1% or so of the right average
+ * frequency, albeit with some jitter in pulse length - Steve
+ *
+ * This should use ndelay instead.
+ */
+
+/* To match 8 fractional bits used for pulse/space length */
+
+static void send_space_irdeo(long length)
+{
+ if (length <= 0)
+ return;
+
+ safe_udelay(length);
+}
+
+#ifdef CONFIG_IR_SERIAL_TRANSMITTER
+static long send_pulse_homebrew_softcarrier(unsigned long length)
+{
+ int flag;
+ unsigned long actual, target, d;
+
+ length <<= 8;
+
+ actual = 0; target = 0; flag = 0;
+ while (actual < length) {
+ if (flag) {
+ off();
+ target += serial_ir.space_width;
+ } else {
+ on();
+ target += serial_ir.pulse_width;
+ }
+ d = (target - actual -
+ IR_SERIAL_TRANSMITTER_LATENCY + 128) >> 8;
+ /*
+ * Note - we've checked in ioctl that the pulse/space
+ * widths are big enough so that d is > 0
+ */
+ udelay(d);
+ actual += (d << 8) + IR_SERIAL_TRANSMITTER_LATENCY;
+ flag = !flag;
+ }
+ return (actual-length) >> 8;
+}
+
+static long send_pulse_homebrew(unsigned long length)
+{
+ if (length <= 0)
+ return 0;
+
+ if (softcarrier)
+ return send_pulse_homebrew_softcarrier(length);
+
+ on();
+ safe_udelay(length);
+ return 0;
+}
+
+static void send_space_homebrew(long length)
+{
+ off();
+ if (length <= 0)
+ return;
+ safe_udelay(length);
+}
+#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();
+
+ /*
+ * If PULSE_BIT is set a pulse has been
+ * received, otherwise a space has been
+ * received. The driver needs to know if your
+ * receiver is active high or active low, or
+ * the space/pulse sense could be
+ * inverted. The bits denoted by PULSE_MASK are
+ * the length in microseconds. Lengths greater
+ * than or equal to 16 seconds are clamped to
+ * PULSE_MASK. All other bits are unused.
+ * This is a much simpler interface for user
+ * programs, as well as eliminating "out of
+ * phase" errors with space/pulse
+ * autodetection.
+ */
+
+ /* calc time since last interrupt in microseconds */
+ 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 = (unsigned int)ktime_to_ns(delkt);
+ frbwrite(data, !(dcd^sense));
+ serial_ir.lastkt = kt;
+ last_dcd = dcd;
+ ir_raw_event_handle(serial_ir.rcdev);
+ }
+ } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */
+ 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/serial/8250.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 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),
+ DRIVER_NAME, &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. */
+ /*
+ * Future MMAP-Developers: Attention!
+ * For memory mapped I/O you *might* need to use ioremap() first,
+ * for the NSLU2 it's done in boot code.
+ */
+ if (((iommap)
+ && (devm_request_mem_region(&dev->dev, iommap, 8 << ioshift,
+ DRIVER_NAME) == NULL))
+ || ((!iommap)
+ && (devm_request_region(&dev->dev, io, 8,
+ DRIVER_NAME) == 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;
+ }
+
+ 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;
+ long delta = 0;
+ int i;
+
+ spin_lock_irqsave(&hardware[type].lock, flags);
+ if (type == IR_IRDEO) {
+ /* DTR, RTS down */
+ on();
+ }
+ for (i = 0; i < count; i++) {
+ if (i%2)
+ hardware[type].send_space(txbuf[i] - delta);
+ else
+ delta = hardware[type].send_pulse(txbuf[i]);
+ }
+ off();
+ spin_unlock_irqrestore(&hardware[type].lock, flags);
+ return count;
+}
+
+static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle)
+{
+ return init_timing_params(cycle, serial_ir.freq);
+}
+
+static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier)
+{
+ if (carrier > 500000 || carrier < 20000)
+ return -EINVAL;
+
+ return init_timing_params(serial_ir.duty_cycle, carrier);
+}
+
+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:
+ case IR_NSLU2:
+ /* 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 (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;
+ case IR_NSLU2:
+ rcdev->input_name = "Serial IR type NSLU2 RX:CTS2/TX:GreenLED)";
+ break;
+ }
+
+ rcdev->input_phys = DRIVER_NAME "/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 = DRIVER_NAME;
+ rcdev->map_name = RC_MAP_RC6_MCE;
+ rcdev->timeout = IR_DEFAULT_TIMEOUT;
+ rcdev->rx_resolution = 250000;
+
+ serial_ir.rcdev = rcdev;
+
+ return rc_register_device(rcdev);
+}
+
+static void __exit serial_ir_exit_module(void)
+{
+ 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, 5 = NSLU2 RX:CTS2/TX:GreenLED)");
+
+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)");
diff --git a/drivers/staging/media/lirc/Kconfig b/drivers/staging/media/lirc/Kconfig
index 6879c46..25b7e7c 100644
--- a/drivers/staging/media/lirc/Kconfig
+++ b/drivers/staging/media/lirc/Kconfig
@@ -38,19 +38,6 @@ config LIRC_SASEM
help
Driver for the Sasem OnAir Remocon-V or Dign HV5 HTPC IR/VFD Module
-config LIRC_SERIAL
- tristate "Homebrew Serial Port Receiver"
- depends on LIRC
- help
- Driver for Homebrew Serial Port Receivers
-
-config LIRC_SERIAL_TRANSMITTER
- bool "Serial Port Transmitter"
- default y
- depends on LIRC_SERIAL
- help
- Serial Port Transmitter support
-
config LIRC_SIR
tristate "Built-in SIR IrDA port"
depends on LIRC
diff --git a/drivers/staging/media/lirc/Makefile b/drivers/staging/media/lirc/Makefile
index 5430adf..7f919ea 100644
--- a/drivers/staging/media/lirc/Makefile
+++ b/drivers/staging/media/lirc/Makefile
@@ -7,6 +7,5 @@ obj-$(CONFIG_LIRC_BT829) += lirc_bt829.o
obj-$(CONFIG_LIRC_IMON) += lirc_imon.o
obj-$(CONFIG_LIRC_PARALLEL) += lirc_parallel.o
obj-$(CONFIG_LIRC_SASEM) += lirc_sasem.o
-obj-$(CONFIG_LIRC_SERIAL) += lirc_serial.o
obj-$(CONFIG_LIRC_SIR) += lirc_sir.o
obj-$(CONFIG_LIRC_ZILOG) += lirc_zilog.o
diff --git a/drivers/staging/media/lirc/lirc_serial.c b/drivers/staging/media/lirc/lirc_serial.c
deleted file mode 100644
index b798b31..0000000
--- a/drivers/staging/media/lirc/lirc_serial.c
+++ /dev/null
@@ -1,1130 +0,0 @@
-/*
- * lirc_serial.c
- *
- * lirc_serial - Device driver that records pulse- and pause-lengths
- * (space-lengths) between DDCD event on a serial port.
- *
- * Copyright (C) 1996,97 Ralph Metzler <rjkm@xxxxxxxxxxxxxxxx>
- * Copyright (C) 1998 Trent Piepho <xyzzy@xxxxxxxxxxxxxxxx>
- * Copyright (C) 1998 Ben Pfaff <blp@xxxxxxx>
- * Copyright (C) 1999 Christoph Bartelmus <lirc@xxxxxxxxxxxx>
- * Copyright (C) 2007 Andrei Tanas <andrei@xxxxxxxx> (suspend/resume support)
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-/*
- * Steve's changes to improve transmission fidelity:
- * - for systems with the rdtsc instruction and the clock counter, a
- * send_pule that times the pulses directly using the counter.
- * This means that the LIRC_SERIAL_TRANSMITTER_LATENCY fudge is
- * not needed. Measurement shows very stable waveform, even where
- * PCI activity slows the access to the UART, which trips up other
- * versions.
- * - For other system, non-integer-microsecond pulse/space lengths,
- * done using fixed point binary. So, much more accurate carrier
- * frequency.
- * - fine tuned transmitter latency, taking advantage of fractional
- * microseconds in previous change
- * - Fixed bug in the way transmitter latency was accounted for by
- * tuning the pulse lengths down - the send_pulse routine ignored
- * this overhead as it timed the overall pulse length - so the
- * pulse frequency was right but overall pulse length was too
- * long. Fixed by accounting for latency on each pulse/space
- * iteration.
- *
- * Steve Davies <steve@xxxxxxxxxxxxx> July 2001
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/serial_reg.h>
-#include <linux/ktime.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/wait.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/poll.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/fcntl.h>
-#include <linux/spinlock.h>
-
-/* From Intel IXP42X Developer's Manual (#252480-005): */
-/* ftp://download.intel.com/design/network/manuals/25248005.pdf */
-#define UART_IE_IXP42X_UUE 0x40 /* IXP42X UART Unit enable */
-#define UART_IE_IXP42X_RTOIE 0x10 /* IXP42X Receiver Data Timeout int.enable */
-
-#include <media/lirc.h>
-#include <media/lirc_dev.h>
-
-#define LIRC_DRIVER_NAME "lirc_serial"
-
-struct lirc_serial {
- int signal_pin;
- int signal_pin_change;
- u8 on;
- u8 off;
- long (*send_pulse)(unsigned long length);
- void (*send_space)(long length);
- int features;
- spinlock_t lock;
-};
-
-#define LIRC_HOMEBREW 0
-#define LIRC_IRDEO 1
-#define LIRC_IRDEO_REMOTE 2
-#define LIRC_ANIMAX 3
-#define LIRC_IGOR 4
-#define LIRC_NSLU2 5
-
-/*** 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 long send_pulse_irdeo(unsigned long length);
-static long send_pulse_homebrew(unsigned long length);
-static void send_space_irdeo(long length);
-static void send_space_homebrew(long length);
-
-static struct lirc_serial hardware[] = {
- [LIRC_HOMEBREW] = {
- .lock = __SPIN_LOCK_UNLOCKED(hardware[LIRC_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),
- .send_pulse = send_pulse_homebrew,
- .send_space = send_space_homebrew,
-#ifdef CONFIG_LIRC_SERIAL_TRANSMITTER
- .features = (LIRC_CAN_SET_SEND_DUTY_CYCLE |
- LIRC_CAN_SET_SEND_CARRIER |
- LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2)
-#else
- .features = LIRC_CAN_REC_MODE2
-#endif
- },
-
- [LIRC_IRDEO] = {
- .lock = __SPIN_LOCK_UNLOCKED(hardware[LIRC_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,
- .features = (LIRC_CAN_SET_SEND_DUTY_CYCLE |
- LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2)
- },
-
- [LIRC_IRDEO_REMOTE] = {
- .lock = __SPIN_LOCK_UNLOCKED(hardware[LIRC_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,
- .features = (LIRC_CAN_SET_SEND_DUTY_CYCLE |
- LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2)
- },
-
- [LIRC_ANIMAX] = {
- .lock = __SPIN_LOCK_UNLOCKED(hardware[LIRC_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),
- .send_pulse = NULL,
- .send_space = NULL,
- .features = LIRC_CAN_REC_MODE2
- },
-
- [LIRC_IGOR] = {
- .lock = __SPIN_LOCK_UNLOCKED(hardware[LIRC_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),
- .send_pulse = send_pulse_homebrew,
- .send_space = send_space_homebrew,
-#ifdef CONFIG_LIRC_SERIAL_TRANSMITTER
- .features = (LIRC_CAN_SET_SEND_DUTY_CYCLE |
- LIRC_CAN_SET_SEND_CARRIER |
- LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2)
-#else
- .features = LIRC_CAN_REC_MODE2
-#endif
- },
-};
-
-#define RS_ISR_PASS_LIMIT 256
-
-/*
- * A long pulse code from a remote might take up to 300 bytes. The
- * daemon should read the bytes as soon as they are generated, so take
- * the number of keys you think you can push before the daemon runs
- * and multiply by 300. The driver will warn you if you overrun this
- * buffer. If you have a slow computer or non-busmastering IDE disks,
- * maybe you will need to increase this.
- */
-
-/* This MUST be a power of two! It has to be larger than 1 as well. */
-
-#define RBUF_LEN 256
-
-static ktime_t lastkt;
-
-static struct lirc_buffer rbuf;
-
-static unsigned int freq = 38000;
-static unsigned int duty_cycle = 50;
-
-/* Initialized in init_timing_params() */
-static unsigned long period;
-static unsigned long pulse_width;
-static unsigned long space_width;
-
-#if defined(__i386__)
-/*
- * From:
- * Linux I/O port programming mini-HOWTO
- * Author: Riku Saikkonen <Riku.Saikkonen@xxxxxx>
- * v, 28 December 1997
- *
- * [...]
- * Actually, a port I/O instruction on most ports in the 0-0x3ff range
- * takes almost exactly 1 microsecond, so if you're, for example, using
- * the parallel port directly, just do additional inb()s from that port
- * to delay.
- * [...]
- */
-/* transmitter latency 1.5625us 0x1.90 - this figure arrived at from
- * comment above plus trimming to match actual measured frequency.
- * This will be sensitive to cpu speed, though hopefully most of the 1.5us
- * is spent in the uart access. Still - for reference test machine was a
- * 1.13GHz Athlon system - Steve
- */
-
-/*
- * changed from 400 to 450 as this works better on slower machines;
- * faster machines will use the rdtsc code anyway
- */
-#define LIRC_SERIAL_TRANSMITTER_LATENCY 450
-
-#else
-
-/* does anybody have information on other platforms ? */
-/* 256 = 1<<8 */
-#define LIRC_SERIAL_TRANSMITTER_LATENCY 256
-
-#endif /* __i386__ */
-/*
- * FIXME: should we be using hrtimers instead of this
- * LIRC_SERIAL_TRANSMITTER_LATENCY nonsense?
- */
-
-/* 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);
-}
-
-#ifndef MAX_UDELAY_MS
-#define MAX_UDELAY_US 5000
-#else
-#define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
-#endif
-
-static void safe_udelay(unsigned long usecs)
-{
- while (usecs > MAX_UDELAY_US) {
- udelay(MAX_UDELAY_US);
- usecs -= MAX_UDELAY_US;
- }
- udelay(usecs);
-}
-
-#ifdef USE_RDTSC
-/*
- * This is an overflow/precision juggle, complicated in that we can't
- * do long long divide in the kernel
- */
-
-/*
- * When we use the rdtsc instruction to measure clocks, we keep the
- * pulse and space widths as clock cycles. As this is CPU speed
- * dependent, the widths must be calculated in init_port and ioctl
- * time
- */
-
-static int init_timing_params(unsigned int new_duty_cycle,
- unsigned int new_freq)
-{
- __u64 loops_per_sec, work;
-
- duty_cycle = new_duty_cycle;
- freq = new_freq;
-
- loops_per_sec = __this_cpu_read(cpu.info.loops_per_jiffy);
- loops_per_sec *= HZ;
-
- /* How many clocks in a microsecond?, avoiding long long divide */
- work = loops_per_sec;
- work *= 4295; /* 4295 = 2^32 / 1e6 */
-
- /*
- * Carrier period in clocks, approach good up to 32GHz clock,
- * gets carrier frequency within 8Hz
- */
- period = loops_per_sec >> 3;
- period /= (freq >> 3);
-
- /* Derive pulse and space from the period */
- pulse_width = period * duty_cycle / 100;
- space_width = period - pulse_width;
- pr_debug("in init_timing_params, freq=%d, duty_cycle=%d, clk/jiffy=%ld, pulse=%ld, space=%ld, conv_us_to_clocks=%ld\n",
- freq, duty_cycle, __this_cpu_read(cpu_info.loops_per_jiffy),
- pulse_width, space_width, conv_us_to_clocks);
- return 0;
-}
-#else /* ! USE_RDTSC */
-static int init_timing_params(unsigned int new_duty_cycle,
- unsigned int new_freq)
-{
-/*
- * period, pulse/space width are kept with 8 binary places -
- * IE multiplied by 256.
- */
- if (256 * 1000000L / new_freq * new_duty_cycle / 100 <=
- LIRC_SERIAL_TRANSMITTER_LATENCY)
- return -EINVAL;
- if (256 * 1000000L / new_freq * (100 - new_duty_cycle) / 100 <=
- LIRC_SERIAL_TRANSMITTER_LATENCY)
- return -EINVAL;
- duty_cycle = new_duty_cycle;
- freq = new_freq;
- period = 256 * 1000000L / freq;
- pulse_width = period * duty_cycle / 100;
- space_width = period - pulse_width;
- pr_debug("in init_timing_params, freq=%d pulse=%ld, space=%ld\n",
- freq, pulse_width, space_width);
- return 0;
-}
-#endif /* USE_RDTSC */
-
-
-/* return value: space length delta */
-
-static long send_pulse_irdeo(unsigned long length)
-{
- long rawbits, ret;
- int i;
- unsigned char output;
- unsigned char chunk, shifted;
-
- /* how many bits have to be sent ? */
- rawbits = length * 1152 / 10000;
- if (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))
- ;
- }
-
- if (i == 0)
- ret = (-rawbits) * 10000 / 1152;
- else
- ret = (3 - i) * 3 * 10000 / 1152 + (-rawbits) * 10000 / 1152;
-
- return ret;
-}
-
-/* Version using udelay() */
-
-/*
- * here we use fixed point arithmetic, with 8
- * fractional bits. that gets us within 0.1% or so of the right average
- * frequency, albeit with some jitter in pulse length - Steve
- *
- * This should use ndelay instead.
- */
-
-/* To match 8 fractional bits used for pulse/space length */
-
-static long send_pulse_homebrew_softcarrier(unsigned long length)
-{
- int flag;
- unsigned long actual, target, d;
-
- length <<= 8;
-
- actual = 0; target = 0; flag = 0;
- while (actual < length) {
- if (flag) {
- off();
- target += space_width;
- } else {
- on();
- target += pulse_width;
- }
- d = (target - actual -
- LIRC_SERIAL_TRANSMITTER_LATENCY + 128) >> 8;
- /*
- * Note - we've checked in ioctl that the pulse/space
- * widths are big enough so that d is > 0
- */
- udelay(d);
- actual += (d << 8) + LIRC_SERIAL_TRANSMITTER_LATENCY;
- flag = !flag;
- }
- return (actual-length) >> 8;
-}
-
-static long send_pulse_homebrew(unsigned long length)
-{
- if (length <= 0)
- return 0;
-
- if (softcarrier)
- return send_pulse_homebrew_softcarrier(length);
-
- on();
- safe_udelay(length);
- return 0;
-}
-
-static void send_space_irdeo(long length)
-{
- if (length <= 0)
- return;
-
- safe_udelay(length);
-}
-
-static void send_space_homebrew(long length)
-{
- off();
- if (length <= 0)
- return;
- safe_udelay(length);
-}
-
-static void rbwrite(int l)
-{
- if (lirc_buffer_full(&rbuf)) {
- /* no new signals will be accepted */
- pr_debug("Buffer overrun\n");
- return;
- }
- lirc_buffer_write(&rbuf, (void *)&l);
-}
-
-static void frbwrite(int l)
-{
- /* simple noise filter */
- static int pulse, space;
- static unsigned int ptr;
-
- if (ptr > 0 && (l & PULSE_BIT)) {
- pulse += l & PULSE_MASK;
- if (pulse > 250) {
- rbwrite(space);
- rbwrite(pulse | PULSE_BIT);
- ptr = 0;
- pulse = 0;
- }
- return;
- }
- if (!(l & PULSE_BIT)) {
- if (ptr == 0) {
- if (l > 20000) {
- space = l;
- ptr++;
- return;
- }
- } else {
- if (l > 20000) {
- space += pulse;
- if (space > PULSE_MASK)
- space = PULSE_MASK;
- space += l;
- if (space > PULSE_MASK)
- space = PULSE_MASK;
- pulse = 0;
- return;
- }
- rbwrite(space);
- rbwrite(pulse | PULSE_BIT);
- ptr = 0;
- pulse = 0;
- }
- }
- rbwrite(l);
-}
-
-static irqreturn_t lirc_irq_handler(int i, void *blah)
-{
- ktime_t kt;
- int counter, dcd;
- u8 status;
- ktime_t delkt;
- 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) {
- pr_warn("AIEEEE: We're caught!\n");
- break;
- }
- if ((status & hardware[type].signal_pin_change)
- && sense != -1) {
- /* get current time */
- kt = ktime_get();
-
- /* New mode, written by Trent Piepho
- <xyzzy@xxxxxxxxxxxxxxxx>. */
-
- /*
- * The old format was not very portable.
- * We now use an int to pass pulses
- * and spaces to user space.
- *
- * If PULSE_BIT is set a pulse has been
- * received, otherwise a space has been
- * received. The driver needs to know if your
- * receiver is active high or active low, or
- * the space/pulse sense could be
- * inverted. The bits denoted by PULSE_MASK are
- * the length in microseconds. Lengths greater
- * than or equal to 16 seconds are clamped to
- * PULSE_MASK. All other bits are unused.
- * This is a much simpler interface for user
- * programs, as well as eliminating "out of
- * phase" errors with space/pulse
- * autodetection.
- */
-
- /* calc time since last interrupt in microseconds */
- dcd = (status & hardware[type].signal_pin) ? 1 : 0;
-
- if (dcd == last_dcd) {
- pr_warn("ignoring spike: %d %d %llx %llx\n",
- dcd, sense, ktime_to_us(kt),
- ktime_to_us(lastkt));
- continue;
- }
-
- delkt = ktime_sub(kt, lastkt);
- if (ktime_compare(delkt, ktime_set(15, 0)) > 0) {
- data = PULSE_MASK; /* really long time */
- if (!(dcd^sense)) {
- /* sanity check */
- pr_warn("AIEEEE: %d %d %llx %llx\n",
- dcd, sense, ktime_to_us(kt),
- ktime_to_us(lastkt));
- /*
- * detecting pulse while this
- * MUST be a space!
- */
- sense = sense ? 0 : 1;
- }
- } else
- data = (int) ktime_to_us(delkt);
- frbwrite(dcd^sense ? data : (data|PULSE_BIT));
- lastkt = kt;
- last_dcd = dcd;
- wake_up_interruptible(&rbuf.wait_poll);
- }
- } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */
- 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/serial/8250.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 LIRC_IRDEO:
- case LIRC_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 int lirc_serial_probe(struct platform_device *dev)
-{
- int i, nlow, nhigh, result;
-
- result = devm_request_irq(&dev->dev, irq, lirc_irq_handler,
- (share_irq ? IRQF_SHARED : 0),
- LIRC_DRIVER_NAME, &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. */
- /*
- * Future MMAP-Developers: Attention!
- * For memory mapped I/O you *might* need to use ioremap() first,
- * for the NSLU2 it's done in boot code.
- */
- if (((iommap)
- && (devm_request_mem_region(&dev->dev, iommap, 8 << ioshift,
- LIRC_DRIVER_NAME) == NULL))
- || ((!iommap)
- && (devm_request_region(&dev->dev, io, 8,
- LIRC_DRIVER_NAME) == 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;
- }
-
- result = hardware_init_port();
- if (result < 0)
- return result;
-
- /* Initialize pulse/space widths */
- init_timing_params(duty_cycle, freq);
-
- /* 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 set_use_inc(void *data)
-{
- unsigned long flags;
-
- /* initialize timestamp */
- 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 set_use_dec(void *data)
-{ 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 ssize_t lirc_write(struct file *file, const char __user *buf,
- size_t n, loff_t *ppos)
-{
- int i, count;
- unsigned long flags;
- long delta = 0;
- int *wbuf;
-
- if (!(hardware[type].features & LIRC_CAN_SEND_PULSE))
- return -EPERM;
-
- count = n / sizeof(int);
- if (n % sizeof(int) || count % 2 == 0)
- return -EINVAL;
- wbuf = memdup_user(buf, n);
- if (IS_ERR(wbuf))
- return PTR_ERR(wbuf);
- spin_lock_irqsave(&hardware[type].lock, flags);
- if (type == LIRC_IRDEO) {
- /* DTR, RTS down */
- on();
- }
- for (i = 0; i < count; i++) {
- if (i%2)
- hardware[type].send_space(wbuf[i] - delta);
- else
- delta = hardware[type].send_pulse(wbuf[i]);
- }
- off();
- spin_unlock_irqrestore(&hardware[type].lock, flags);
- kfree(wbuf);
- return n;
-}
-
-static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
-{
- int result;
- u32 __user *uptr = (u32 __user *)arg;
- u32 value;
-
- switch (cmd) {
- case LIRC_GET_SEND_MODE:
- if (!(hardware[type].features&LIRC_CAN_SEND_MASK))
- return -ENOIOCTLCMD;
-
- result = put_user(LIRC_SEND2MODE
- (hardware[type].features&LIRC_CAN_SEND_MASK),
- uptr);
- if (result)
- return result;
- break;
-
- case LIRC_SET_SEND_MODE:
- if (!(hardware[type].features&LIRC_CAN_SEND_MASK))
- return -ENOIOCTLCMD;
-
- result = get_user(value, uptr);
- if (result)
- return result;
- /* only LIRC_MODE_PULSE supported */
- if (value != LIRC_MODE_PULSE)
- return -EINVAL;
- break;
-
- case LIRC_GET_LENGTH:
- return -ENOIOCTLCMD;
-
- case LIRC_SET_SEND_DUTY_CYCLE:
- pr_debug("SET_SEND_DUTY_CYCLE\n");
- if (!(hardware[type].features&LIRC_CAN_SET_SEND_DUTY_CYCLE))
- return -ENOIOCTLCMD;
-
- result = get_user(value, uptr);
- if (result)
- return result;
- if (value <= 0 || value > 100)
- return -EINVAL;
- return init_timing_params(value, freq);
-
- case LIRC_SET_SEND_CARRIER:
- pr_debug("SET_SEND_CARRIER\n");
- if (!(hardware[type].features&LIRC_CAN_SET_SEND_CARRIER))
- return -ENOIOCTLCMD;
-
- result = get_user(value, uptr);
- if (result)
- return result;
- if (value > 500000 || value < 20000)
- return -EINVAL;
- return init_timing_params(duty_cycle, value);
-
- default:
- return lirc_dev_fop_ioctl(filep, cmd, arg);
- }
- return 0;
-}
-
-static const struct file_operations lirc_fops = {
- .owner = THIS_MODULE,
- .write = lirc_write,
- .unlocked_ioctl = lirc_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = lirc_ioctl,
-#endif
- .read = lirc_dev_fop_read,
- .poll = lirc_dev_fop_poll,
- .open = lirc_dev_fop_open,
- .release = lirc_dev_fop_close,
- .llseek = no_llseek,
-};
-
-static struct lirc_driver driver = {
- .name = LIRC_DRIVER_NAME,
- .minor = -1,
- .code_length = 1,
- .sample_rate = 0,
- .data = NULL,
- .add_to_buf = NULL,
- .rbuf = &rbuf,
- .set_use_inc = set_use_inc,
- .set_use_dec = set_use_dec,
- .fops = &lirc_fops,
- .dev = NULL,
- .owner = THIS_MODULE,
-};
-
-static struct platform_device *lirc_serial_dev;
-
-static int lirc_serial_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;
-}
-
-/* twisty maze... need a forward-declaration here... */
-static void lirc_serial_exit(void);
-
-static int lirc_serial_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 */
- lastkt = ktime_get();
- soutp(UART_IER, sinp(UART_IER)|UART_IER_MSI);
- off();
-
- lirc_buffer_clear(&rbuf);
-
- spin_unlock_irqrestore(&hardware[type].lock, flags);
-
- return 0;
-}
-
-static struct platform_driver lirc_serial_driver = {
- .probe = lirc_serial_probe,
- .suspend = lirc_serial_suspend,
- .resume = lirc_serial_resume,
- .driver = {
- .name = "lirc_serial",
- },
-};
-
-static int __init lirc_serial_init(void)
-{
- int result;
-
- /* Init read buffer. */
- result = lirc_buffer_init(&rbuf, sizeof(int), RBUF_LEN);
- if (result < 0)
- return result;
-
- result = platform_driver_register(&lirc_serial_driver);
- if (result) {
- printk("lirc register returned %d\n", result);
- goto exit_buffer_free;
- }
-
- lirc_serial_dev = platform_device_alloc("lirc_serial", 0);
- if (!lirc_serial_dev) {
- result = -ENOMEM;
- goto exit_driver_unregister;
- }
-
- result = platform_device_add(lirc_serial_dev);
- if (result)
- goto exit_device_put;
-
- return 0;
-
-exit_device_put:
- platform_device_put(lirc_serial_dev);
-exit_driver_unregister:
- platform_driver_unregister(&lirc_serial_driver);
-exit_buffer_free:
- lirc_buffer_free(&rbuf);
- return result;
-}
-
-static void lirc_serial_exit(void)
-{
- platform_device_unregister(lirc_serial_dev);
- platform_driver_unregister(&lirc_serial_driver);
- lirc_buffer_free(&rbuf);
-}
-
-static int __init lirc_serial_init_module(void)
-{
- int result;
-
- switch (type) {
- case LIRC_HOMEBREW:
- case LIRC_IRDEO:
- case LIRC_IRDEO_REMOTE:
- case LIRC_ANIMAX:
- case LIRC_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 LIRC_HOMEBREW:
- case LIRC_IGOR:
- hardware[type].features &=
- ~(LIRC_CAN_SET_SEND_DUTY_CYCLE|
- LIRC_CAN_SET_SEND_CARRIER);
- break;
- }
- }
-
- /* make sure sense is either -1, 0, or 1 */
- if (sense != -1)
- sense = !!sense;
-
- result = lirc_serial_init();
- if (result)
- return result;
-
- driver.features = hardware[type].features;
- driver.dev = &lirc_serial_dev->dev;
- driver.minor = lirc_register_driver(&driver);
- if (driver.minor < 0) {
- pr_err("register_chrdev failed!\n");
- lirc_serial_exit();
- return driver.minor;
- }
- return 0;
-}
-
-static void __exit lirc_serial_exit_module(void)
-{
- lirc_unregister_driver(driver.minor);
- lirc_serial_exit();
- pr_debug("cleaned up module\n");
-}
-
-
-module_init(lirc_serial_init_module);
-module_exit(lirc_serial_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, S_IRUGO);
-MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo,"
- " 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug,"
- " 5 = NSLU2 RX:CTS2/TX:GreenLED)");
-
-module_param(io, int, S_IRUGO);
-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, S_IRUGO);
-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, S_IRUGO);
-MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)");
-
-module_param(irq, int, S_IRUGO);
-MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
-
-module_param(share_irq, bool, S_IRUGO);
-MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)");
-
-module_param(sense, int, S_IRUGO);
-MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit"
- " (0 = active high, 1 = active low )");
-
-#ifdef CONFIG_LIRC_SERIAL_TRANSMITTER
-module_param(txsense, bool, S_IRUGO);
-MODULE_PARM_DESC(txsense, "Sense of transmitter circuit"
- " (0 = active high, 1 = active low )");
-#endif
-
-module_param(softcarrier, bool, S_IRUGO);
-MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
--
2.7.4
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