v4.19.13 snapshot.
diff --git a/drivers/media/rc/serial_ir.c b/drivers/media/rc/serial_ir.c
new file mode 100644
index 0000000..8bf5637
--- /dev/null
+++ b/drivers/media/rc/serial_ir.c
@@ -0,0 +1,859 @@
+/*
+ * 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 ulong 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 carrier;
+ unsigned int duty_cycle;
+};
+
+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 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;
+ unsigned int pulse, space;
+
+ /* Ensure the dividend fits into 32 bit */
+ pulse = DIV_ROUND_CLOSEST(serial_ir.duty_cycle * (NSEC_PER_SEC / 100),
+ serial_ir.carrier);
+ space = DIV_ROUND_CLOSEST((100 - serial_ir.duty_cycle) *
+ (NSEC_PER_SEC / 100), serial_ir.carrier);
+
+ for (;;) {
+ now = ktime_get();
+ if (ktime_compare(now, target) >= 0)
+ break;
+ on();
+ edge = ktime_add_ns(edge, pulse);
+ 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, space);
+ 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(struct timer_list *unused)
+{
+ 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);
+}
+
+/* Needed by serial_ir_probe() */
+static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
+ unsigned int count);
+static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle);
+static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier);
+static int serial_ir_open(struct rc_dev *rcdev);
+static void serial_ir_close(struct rc_dev *rcdev);
+
+static int serial_ir_probe(struct platform_device *dev)
+{
+ struct rc_dev *rcdev;
+ int i, nlow, nhigh, result;
+
+ rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW);
+ if (!rcdev)
+ return -ENOMEM;
+
+ 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->device_name = "Serial IR type home-brew";
+ break;
+ case IR_IRDEO:
+ rcdev->device_name = "Serial IR type IRdeo";
+ break;
+ case IR_IRDEO_REMOTE:
+ rcdev->device_name = "Serial IR type IRdeo remote";
+ break;
+ case IR_ANIMAX:
+ rcdev->device_name = "Serial IR type AnimaX";
+ break;
+ case IR_IGOR:
+ rcdev->device_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->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+ 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;
+
+ timer_setup(&serial_ir.timeout_timer, serial_ir_timeout, 0);
+
+ 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;
+ }
+
+ result = hardware_init_port();
+ if (result < 0)
+ return result;
+
+ /* Initialize pulse/space widths */
+ serial_ir.duty_cycle = 50;
+ serial_ir.carrier = 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 devm_rc_register_device(&dev->dev, rcdev);
+}
+
+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)
+{
+ serial_ir.duty_cycle = cycle;
+ return 0;
+}
+
+static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier)
+{
+ if (carrier > 500000 || carrier < 20000)
+ return -EINVAL;
+
+ serial_ir.carrier = 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)
+{
+ 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 0;
+
+ serial_ir_exit();
+ return result;
+}
+
+static void __exit serial_ir_exit_module(void)
+{
+ del_timer_sync(&serial_ir.timeout_timer);
+ 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_hw(io, int, ioport, 0444);
+MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
+
+/* some architectures (e.g. intel xscale) have memory mapped registers */
+module_param_hw(iommap, ulong, other, 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_hw(ioshift, int, other, 0444);
+MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)");
+
+module_param_hw(irq, int, irq, 0444);
+MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
+
+module_param_hw(share_irq, bool, other, 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)");