| /* |
| * 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; |
| struct 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) |
| { |
| struct ir_raw_event ev = { |
| .timeout = true, |
| .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)"); |