/drivers/staging/lirc/lirc_sir.c
https://bitbucket.org/wisechild/galaxy-nexus · C · 1279 lines · 911 code · 175 blank · 193 comment · 116 complexity · 9b34b3c9cc42ffcc3791b4a0c772cc5e MD5 · raw file
- /*
- * LIRC SIR driver, (C) 2000 Milan Pikula <www@fornax.sk>
- *
- * lirc_sir - Device driver for use with SIR (serial infra red)
- * mode of IrDA on many notebooks.
- *
- * 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
- *
- *
- * 2000/09/16 Frank Przybylski <mail@frankprzybylski.de> :
- * added timeout and relaxed pulse detection, removed gap bug
- *
- * 2000/12/15 Christoph Bartelmus <lirc@bartelmus.de> :
- * added support for Tekram Irmate 210 (sending does not work yet,
- * kind of disappointing that nobody was able to implement that
- * before),
- * major clean-up
- *
- * 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
- * added support for StrongARM SA1100 embedded microprocessor
- * parts cut'n'pasted from sa1100_ir.c (C) 2000 Russell King
- */
- #include <linux/module.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/signal.h>
- #include <linux/fs.h>
- #include <linux/interrupt.h>
- #include <linux/ioport.h>
- #include <linux/kernel.h>
- #include <linux/serial_reg.h>
- #include <linux/time.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 <asm/system.h>
- #include <linux/io.h>
- #include <asm/irq.h>
- #include <linux/fcntl.h>
- #ifdef LIRC_ON_SA1100
- #include <asm/hardware.h>
- #ifdef CONFIG_SA1100_COLLIE
- #include <asm/arch/tc35143.h>
- #include <asm/ucb1200.h>
- #endif
- #endif
- #include <linux/timer.h>
- #include <media/lirc.h>
- #include <media/lirc_dev.h>
- /* SECTION: Definitions */
- /*** Tekram dongle ***/
- #ifdef LIRC_SIR_TEKRAM
- /* stolen from kernel source */
- /* definitions for Tekram dongle */
- #define TEKRAM_115200 0x00
- #define TEKRAM_57600 0x01
- #define TEKRAM_38400 0x02
- #define TEKRAM_19200 0x03
- #define TEKRAM_9600 0x04
- #define TEKRAM_2400 0x08
- #define TEKRAM_PW 0x10 /* Pulse select bit */
- /* 10bit * 1s/115200bit in milliseconds = 87ms*/
- #define TIME_CONST (10000000ul/115200ul)
- #endif
- #ifdef LIRC_SIR_ACTISYS_ACT200L
- static void init_act200(void);
- #elif defined(LIRC_SIR_ACTISYS_ACT220L)
- static void init_act220(void);
- #endif
- /*** SA1100 ***/
- #ifdef LIRC_ON_SA1100
- struct sa1100_ser2_registers {
- /* HSSP control register */
- unsigned char hscr0;
- /* UART registers */
- unsigned char utcr0;
- unsigned char utcr1;
- unsigned char utcr2;
- unsigned char utcr3;
- unsigned char utcr4;
- unsigned char utdr;
- unsigned char utsr0;
- unsigned char utsr1;
- } sr;
- static int irq = IRQ_Ser2ICP;
- #define LIRC_ON_SA1100_TRANSMITTER_LATENCY 0
- /* pulse/space ratio of 50/50 */
- static unsigned long pulse_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
- /* 1000000/freq-pulse_width */
- static unsigned long space_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
- static unsigned int freq = 38000; /* modulation frequency */
- static unsigned int duty_cycle = 50; /* duty cycle of 50% */
- #endif
- #define RBUF_LEN 1024
- #define WBUF_LEN 1024
- #define LIRC_DRIVER_NAME "lirc_sir"
- #define PULSE '['
- #ifndef LIRC_SIR_TEKRAM
- /* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
- #define TIME_CONST (9000000ul/115200ul)
- #endif
- /* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
- #define SIR_TIMEOUT (HZ*5/100)
- #ifndef LIRC_ON_SA1100
- #ifndef LIRC_IRQ
- #define LIRC_IRQ 4
- #endif
- #ifndef LIRC_PORT
- /* for external dongles, default to com1 */
- #if defined(LIRC_SIR_ACTISYS_ACT200L) || \
- defined(LIRC_SIR_ACTISYS_ACT220L) || \
- defined(LIRC_SIR_TEKRAM)
- #define LIRC_PORT 0x3f8
- #else
- /* onboard sir ports are typically com3 */
- #define LIRC_PORT 0x3e8
- #endif
- #endif
- static int io = LIRC_PORT;
- static int irq = LIRC_IRQ;
- static int threshold = 3;
- #endif
- static DEFINE_SPINLOCK(timer_lock);
- static struct timer_list timerlist;
- /* time of last signal change detected */
- static struct timeval last_tv = {0, 0};
- /* time of last UART data ready interrupt */
- static struct timeval last_intr_tv = {0, 0};
- static int last_value;
- static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
- static DEFINE_SPINLOCK(hardware_lock);
- static int rx_buf[RBUF_LEN];
- static unsigned int rx_tail, rx_head;
- static int debug;
- #define dprintk(fmt, args...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
- fmt, ## args); \
- } while (0)
- /* SECTION: Prototypes */
- /* Communication with user-space */
- static unsigned int lirc_poll(struct file *file, poll_table *wait);
- static ssize_t lirc_read(struct file *file, char *buf, size_t count,
- loff_t *ppos);
- static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
- loff_t *pos);
- static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
- static void add_read_queue(int flag, unsigned long val);
- static int init_chrdev(void);
- static void drop_chrdev(void);
- /* Hardware */
- static irqreturn_t sir_interrupt(int irq, void *dev_id);
- static void send_space(unsigned long len);
- static void send_pulse(unsigned long len);
- static int init_hardware(void);
- static void drop_hardware(void);
- /* Initialisation */
- static int init_port(void);
- static void drop_port(void);
- #ifdef LIRC_ON_SA1100
- static void on(void)
- {
- PPSR |= PPC_TXD2;
- }
- static void off(void)
- {
- PPSR &= ~PPC_TXD2;
- }
- #else
- static inline unsigned int sinp(int offset)
- {
- return inb(io + offset);
- }
- static inline void soutp(int offset, int value)
- {
- outb(value, io + offset);
- }
- #endif
- #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);
- }
- /* SECTION: Communication with user-space */
- static unsigned int lirc_poll(struct file *file, poll_table *wait)
- {
- poll_wait(file, &lirc_read_queue, wait);
- if (rx_head != rx_tail)
- return POLLIN | POLLRDNORM;
- return 0;
- }
- static ssize_t lirc_read(struct file *file, char *buf, size_t count,
- loff_t *ppos)
- {
- int n = 0;
- int retval = 0;
- DECLARE_WAITQUEUE(wait, current);
- if (count % sizeof(int))
- return -EINVAL;
- add_wait_queue(&lirc_read_queue, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- while (n < count) {
- if (rx_head != rx_tail) {
- if (copy_to_user((void *) buf + n,
- (void *) (rx_buf + rx_head),
- sizeof(int))) {
- retval = -EFAULT;
- break;
- }
- rx_head = (rx_head + 1) & (RBUF_LEN - 1);
- n += sizeof(int);
- } else {
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- break;
- }
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- schedule();
- set_current_state(TASK_INTERRUPTIBLE);
- }
- }
- remove_wait_queue(&lirc_read_queue, &wait);
- set_current_state(TASK_RUNNING);
- return n ? n : retval;
- }
- static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
- loff_t *pos)
- {
- unsigned long flags;
- int i, count;
- int *tx_buf;
- count = n / sizeof(int);
- if (n % sizeof(int) || count % 2 == 0)
- return -EINVAL;
- tx_buf = memdup_user(buf, n);
- if (IS_ERR(tx_buf))
- return PTR_ERR(tx_buf);
- i = 0;
- #ifdef LIRC_ON_SA1100
- /* disable receiver */
- Ser2UTCR3 = 0;
- #endif
- local_irq_save(flags);
- while (1) {
- if (i >= count)
- break;
- if (tx_buf[i])
- send_pulse(tx_buf[i]);
- i++;
- if (i >= count)
- break;
- if (tx_buf[i])
- send_space(tx_buf[i]);
- i++;
- }
- local_irq_restore(flags);
- #ifdef LIRC_ON_SA1100
- off();
- udelay(1000); /* wait 1ms for IR diode to recover */
- Ser2UTCR3 = 0;
- /* clear status register to prevent unwanted interrupts */
- Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
- /* enable receiver */
- Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
- #endif
- kfree(tx_buf);
- return count;
- }
- static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
- {
- int retval = 0;
- __u32 value = 0;
- #ifdef LIRC_ON_SA1100
- if (cmd == LIRC_GET_FEATURES)
- value = LIRC_CAN_SEND_PULSE |
- LIRC_CAN_SET_SEND_DUTY_CYCLE |
- LIRC_CAN_SET_SEND_CARRIER |
- LIRC_CAN_REC_MODE2;
- else if (cmd == LIRC_GET_SEND_MODE)
- value = LIRC_MODE_PULSE;
- else if (cmd == LIRC_GET_REC_MODE)
- value = LIRC_MODE_MODE2;
- #else
- if (cmd == LIRC_GET_FEATURES)
- value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
- else if (cmd == LIRC_GET_SEND_MODE)
- value = LIRC_MODE_PULSE;
- else if (cmd == LIRC_GET_REC_MODE)
- value = LIRC_MODE_MODE2;
- #endif
- switch (cmd) {
- case LIRC_GET_FEATURES:
- case LIRC_GET_SEND_MODE:
- case LIRC_GET_REC_MODE:
- retval = put_user(value, (__u32 *) arg);
- break;
- case LIRC_SET_SEND_MODE:
- case LIRC_SET_REC_MODE:
- retval = get_user(value, (__u32 *) arg);
- break;
- #ifdef LIRC_ON_SA1100
- case LIRC_SET_SEND_DUTY_CYCLE:
- retval = get_user(value, (__u32 *) arg);
- if (retval)
- return retval;
- if (value <= 0 || value > 100)
- return -EINVAL;
- /* (value/100)*(1000000/freq) */
- duty_cycle = value;
- pulse_width = (unsigned long) duty_cycle*10000/freq;
- space_width = (unsigned long) 1000000L/freq-pulse_width;
- if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
- pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
- if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
- space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
- break;
- case LIRC_SET_SEND_CARRIER:
- retval = get_user(value, (__u32 *) arg);
- if (retval)
- return retval;
- if (value > 500000 || value < 20000)
- return -EINVAL;
- freq = value;
- pulse_width = (unsigned long) duty_cycle*10000/freq;
- space_width = (unsigned long) 1000000L/freq-pulse_width;
- if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
- pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
- if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
- space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
- break;
- #endif
- default:
- retval = -ENOIOCTLCMD;
- }
- if (retval)
- return retval;
- if (cmd == LIRC_SET_REC_MODE) {
- if (value != LIRC_MODE_MODE2)
- retval = -ENOSYS;
- } else if (cmd == LIRC_SET_SEND_MODE) {
- if (value != LIRC_MODE_PULSE)
- retval = -ENOSYS;
- }
- return retval;
- }
- static void add_read_queue(int flag, unsigned long val)
- {
- unsigned int new_rx_tail;
- int newval;
- dprintk("add flag %d with val %lu\n", flag, val);
- newval = val & PULSE_MASK;
- /*
- * statistically, pulses are ~TIME_CONST/2 too long. we could
- * maybe make this more exact, but this is good enough
- */
- if (flag) {
- /* pulse */
- if (newval > TIME_CONST/2)
- newval -= TIME_CONST/2;
- else /* should not ever happen */
- newval = 1;
- newval |= PULSE_BIT;
- } else {
- newval += TIME_CONST/2;
- }
- new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
- if (new_rx_tail == rx_head) {
- dprintk("Buffer overrun.\n");
- return;
- }
- rx_buf[rx_tail] = newval;
- rx_tail = new_rx_tail;
- wake_up_interruptible(&lirc_read_queue);
- }
- static const struct file_operations lirc_fops = {
- .owner = THIS_MODULE,
- .read = lirc_read,
- .write = lirc_write,
- .poll = lirc_poll,
- .unlocked_ioctl = lirc_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = lirc_ioctl,
- #endif
- .open = lirc_dev_fop_open,
- .release = lirc_dev_fop_close,
- .llseek = no_llseek,
- };
- static int set_use_inc(void *data)
- {
- return 0;
- }
- static void set_use_dec(void *data)
- {
- }
- static struct lirc_driver driver = {
- .name = LIRC_DRIVER_NAME,
- .minor = -1,
- .code_length = 1,
- .sample_rate = 0,
- .data = NULL,
- .add_to_buf = NULL,
- .set_use_inc = set_use_inc,
- .set_use_dec = set_use_dec,
- .fops = &lirc_fops,
- .dev = NULL,
- .owner = THIS_MODULE,
- };
- static int init_chrdev(void)
- {
- driver.minor = lirc_register_driver(&driver);
- if (driver.minor < 0) {
- printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n");
- return -EIO;
- }
- return 0;
- }
- static void drop_chrdev(void)
- {
- lirc_unregister_driver(driver.minor);
- }
- /* SECTION: Hardware */
- static long delta(struct timeval *tv1, struct timeval *tv2)
- {
- unsigned long deltv;
- deltv = tv2->tv_sec - tv1->tv_sec;
- if (deltv > 15)
- deltv = 0xFFFFFF;
- else
- deltv = deltv*1000000 +
- tv2->tv_usec -
- tv1->tv_usec;
- return deltv;
- }
- static void sir_timeout(unsigned long data)
- {
- /*
- * if last received signal was a pulse, but receiving stopped
- * within the 9 bit frame, we need to finish this pulse and
- * simulate a signal change to from pulse to space. Otherwise
- * upper layers will receive two sequences next time.
- */
- unsigned long flags;
- unsigned long pulse_end;
- /* avoid interference with interrupt */
- spin_lock_irqsave(&timer_lock, flags);
- if (last_value) {
- #ifndef LIRC_ON_SA1100
- /* clear unread bits in UART and restart */
- outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
- #endif
- /* determine 'virtual' pulse end: */
- pulse_end = delta(&last_tv, &last_intr_tv);
- dprintk("timeout add %d for %lu usec\n", last_value, pulse_end);
- add_read_queue(last_value, pulse_end);
- last_value = 0;
- last_tv = last_intr_tv;
- }
- spin_unlock_irqrestore(&timer_lock, flags);
- }
- static irqreturn_t sir_interrupt(int irq, void *dev_id)
- {
- unsigned char data;
- struct timeval curr_tv;
- static unsigned long deltv;
- #ifdef LIRC_ON_SA1100
- int status;
- static int n;
- status = Ser2UTSR0;
- /*
- * Deal with any receive errors first. The bytes in error may be
- * the only bytes in the receive FIFO, so we do this first.
- */
- while (status & UTSR0_EIF) {
- int bstat;
- if (debug) {
- dprintk("EIF\n");
- bstat = Ser2UTSR1;
- if (bstat & UTSR1_FRE)
- dprintk("frame error\n");
- if (bstat & UTSR1_ROR)
- dprintk("receive fifo overrun\n");
- if (bstat & UTSR1_PRE)
- dprintk("parity error\n");
- }
- bstat = Ser2UTDR;
- n++;
- status = Ser2UTSR0;
- }
- if (status & (UTSR0_RFS | UTSR0_RID)) {
- do_gettimeofday(&curr_tv);
- deltv = delta(&last_tv, &curr_tv);
- do {
- data = Ser2UTDR;
- dprintk("%d data: %u\n", n, (unsigned int) data);
- n++;
- } while (status & UTSR0_RID && /* do not empty fifo in order to
- * get UTSR0_RID in any case */
- Ser2UTSR1 & UTSR1_RNE); /* data ready */
- if (status&UTSR0_RID) {
- add_read_queue(0 , deltv - n * TIME_CONST); /*space*/
- add_read_queue(1, n * TIME_CONST); /*pulse*/
- n = 0;
- last_tv = curr_tv;
- }
- }
- if (status & UTSR0_TFS)
- printk(KERN_ERR "transmit fifo not full, shouldn't happen\n");
- /* We must clear certain bits. */
- status &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
- if (status)
- Ser2UTSR0 = status;
- #else
- unsigned long deltintrtv;
- unsigned long flags;
- int iir, lsr;
- while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
- switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
- case UART_IIR_MSI:
- (void) inb(io + UART_MSR);
- break;
- case UART_IIR_RLSI:
- (void) inb(io + UART_LSR);
- break;
- case UART_IIR_THRI:
- #if 0
- if (lsr & UART_LSR_THRE) /* FIFO is empty */
- outb(data, io + UART_TX)
- #endif
- break;
- case UART_IIR_RDI:
- /* avoid interference with timer */
- spin_lock_irqsave(&timer_lock, flags);
- do {
- del_timer(&timerlist);
- data = inb(io + UART_RX);
- do_gettimeofday(&curr_tv);
- deltv = delta(&last_tv, &curr_tv);
- deltintrtv = delta(&last_intr_tv, &curr_tv);
- dprintk("t %lu, d %d\n", deltintrtv, (int)data);
- /*
- * if nothing came in last X cycles,
- * it was gap
- */
- if (deltintrtv > TIME_CONST * threshold) {
- if (last_value) {
- dprintk("GAP\n");
- /* simulate signal change */
- add_read_queue(last_value,
- deltv -
- deltintrtv);
- last_value = 0;
- last_tv.tv_sec =
- last_intr_tv.tv_sec;
- last_tv.tv_usec =
- last_intr_tv.tv_usec;
- deltv = deltintrtv;
- }
- }
- data = 1;
- if (data ^ last_value) {
- /*
- * deltintrtv > 2*TIME_CONST, remember?
- * the other case is timeout
- */
- add_read_queue(last_value,
- deltv-TIME_CONST);
- last_value = data;
- last_tv = curr_tv;
- if (last_tv.tv_usec >= TIME_CONST) {
- last_tv.tv_usec -= TIME_CONST;
- } else {
- last_tv.tv_sec--;
- last_tv.tv_usec += 1000000 -
- TIME_CONST;
- }
- }
- last_intr_tv = curr_tv;
- if (data) {
- /*
- * start timer for end of
- * sequence detection
- */
- timerlist.expires = jiffies +
- SIR_TIMEOUT;
- add_timer(&timerlist);
- }
- lsr = inb(io + UART_LSR);
- } while (lsr & UART_LSR_DR); /* data ready */
- spin_unlock_irqrestore(&timer_lock, flags);
- break;
- default:
- break;
- }
- }
- #endif
- return IRQ_RETVAL(IRQ_HANDLED);
- }
- #ifdef LIRC_ON_SA1100
- static void send_pulse(unsigned long length)
- {
- unsigned long k, delay;
- int flag;
- if (length == 0)
- return;
- /*
- * this won't give us the carrier frequency we really want
- * due to integer arithmetic, but we can accept this inaccuracy
- */
- for (k = flag = 0; k < length; k += delay, flag = !flag) {
- if (flag) {
- off();
- delay = space_width;
- } else {
- on();
- delay = pulse_width;
- }
- safe_udelay(delay);
- }
- off();
- }
- static void send_space(unsigned long length)
- {
- if (length == 0)
- return;
- off();
- safe_udelay(length);
- }
- #else
- static void send_space(unsigned long len)
- {
- safe_udelay(len);
- }
- static void send_pulse(unsigned long len)
- {
- long bytes_out = len / TIME_CONST;
- if (bytes_out == 0)
- bytes_out++;
- while (bytes_out--) {
- outb(PULSE, io + UART_TX);
- /* FIXME treba seriozne cakanie z char/serial.c */
- while (!(inb(io + UART_LSR) & UART_LSR_THRE))
- ;
- }
- }
- #endif
- #ifdef CONFIG_SA1100_COLLIE
- static int sa1100_irda_set_power_collie(int state)
- {
- if (state) {
- /*
- * 0 - off
- * 1 - short range, lowest power
- * 2 - medium range, medium power
- * 3 - maximum range, high power
- */
- ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
- TC35143_IODIR_OUTPUT);
- ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_LOW);
- udelay(100);
- } else {
- /* OFF */
- ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
- TC35143_IODIR_OUTPUT);
- ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_HIGH);
- }
- return 0;
- }
- #endif
- static int init_hardware(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&hardware_lock, flags);
- /* reset UART */
- #ifdef LIRC_ON_SA1100
- #ifdef CONFIG_SA1100_BITSY
- if (machine_is_bitsy()) {
- printk(KERN_INFO "Power on IR module\n");
- set_bitsy_egpio(EGPIO_BITSY_IR_ON);
- }
- #endif
- #ifdef CONFIG_SA1100_COLLIE
- sa1100_irda_set_power_collie(3); /* power on */
- #endif
- sr.hscr0 = Ser2HSCR0;
- sr.utcr0 = Ser2UTCR0;
- sr.utcr1 = Ser2UTCR1;
- sr.utcr2 = Ser2UTCR2;
- sr.utcr3 = Ser2UTCR3;
- sr.utcr4 = Ser2UTCR4;
- sr.utdr = Ser2UTDR;
- sr.utsr0 = Ser2UTSR0;
- sr.utsr1 = Ser2UTSR1;
- /* configure GPIO */
- /* output */
- PPDR |= PPC_TXD2;
- PSDR |= PPC_TXD2;
- /* set output to 0 */
- off();
- /* Enable HP-SIR modulation, and ensure that the port is disabled. */
- Ser2UTCR3 = 0;
- Ser2HSCR0 = sr.hscr0 & (~HSCR0_HSSP);
- /* clear status register to prevent unwanted interrupts */
- Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
- /* 7N1 */
- Ser2UTCR0 = UTCR0_1StpBit|UTCR0_7BitData;
- /* 115200 */
- Ser2UTCR1 = 0;
- Ser2UTCR2 = 1;
- /* use HPSIR, 1.6 usec pulses */
- Ser2UTCR4 = UTCR4_HPSIR|UTCR4_Z1_6us;
- /* enable receiver, receive fifo interrupt */
- Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
- /* clear status register to prevent unwanted interrupts */
- Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
- #elif defined(LIRC_SIR_TEKRAM)
- /* disable FIFO */
- soutp(UART_FCR,
- UART_FCR_CLEAR_RCVR|
- UART_FCR_CLEAR_XMIT|
- UART_FCR_TRIGGER_1);
- /* 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)));
- /* Set DLAB 1. */
- soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
- /* Set divisor to 12 => 9600 Baud */
- soutp(UART_DLM, 0);
- soutp(UART_DLL, 12);
- /* Set DLAB 0. */
- soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
- /* power supply */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- safe_udelay(50*1000);
- /* -DTR low -> reset PIC */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
- udelay(1*1000);
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- udelay(100);
- /* -RTS low -> send control byte */
- soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
- udelay(7);
- soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
- /* one byte takes ~1042 usec to transmit at 9600,8N1 */
- udelay(1500);
- /* back to normal operation */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- udelay(50);
- udelay(1500);
- /* read previous control byte */
- printk(KERN_INFO LIRC_DRIVER_NAME
- ": 0x%02x\n", sinp(UART_RX));
- /* 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, 8 Bit */
- soutp(UART_LCR, UART_LCR_WLEN8);
- /* enable interrupts */
- soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
- #else
- outb(0, io + UART_MCR);
- outb(0, io + UART_IER);
- /* init UART */
- /* set DLAB, speed = 115200 */
- outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
- outb(1, io + UART_DLL); outb(0, io + UART_DLM);
- /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
- outb(UART_LCR_WLEN7, io + UART_LCR);
- /* FIFO operation */
- outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
- /* interrupts */
- /* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
- outb(UART_IER_RDI, io + UART_IER);
- /* turn on UART */
- outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
- #ifdef LIRC_SIR_ACTISYS_ACT200L
- init_act200();
- #elif defined(LIRC_SIR_ACTISYS_ACT220L)
- init_act220();
- #endif
- #endif
- spin_unlock_irqrestore(&hardware_lock, flags);
- return 0;
- }
- static void drop_hardware(void)
- {
- unsigned long flags;
- spin_lock_irqsave(&hardware_lock, flags);
- #ifdef LIRC_ON_SA1100
- Ser2UTCR3 = 0;
- Ser2UTCR0 = sr.utcr0;
- Ser2UTCR1 = sr.utcr1;
- Ser2UTCR2 = sr.utcr2;
- Ser2UTCR4 = sr.utcr4;
- Ser2UTCR3 = sr.utcr3;
- Ser2HSCR0 = sr.hscr0;
- #ifdef CONFIG_SA1100_BITSY
- if (machine_is_bitsy())
- clr_bitsy_egpio(EGPIO_BITSY_IR_ON);
- #endif
- #ifdef CONFIG_SA1100_COLLIE
- sa1100_irda_set_power_collie(0); /* power off */
- #endif
- #else
- /* turn off interrupts */
- outb(0, io + UART_IER);
- #endif
- spin_unlock_irqrestore(&hardware_lock, flags);
- }
- /* SECTION: Initialisation */
- static int init_port(void)
- {
- int retval;
- /* get I/O port access and IRQ line */
- #ifndef LIRC_ON_SA1100
- if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
- printk(KERN_ERR LIRC_DRIVER_NAME
- ": i/o port 0x%.4x already in use.\n", io);
- return -EBUSY;
- }
- #endif
- retval = request_irq(irq, sir_interrupt, IRQF_DISABLED,
- LIRC_DRIVER_NAME, NULL);
- if (retval < 0) {
- # ifndef LIRC_ON_SA1100
- release_region(io, 8);
- # endif
- printk(KERN_ERR LIRC_DRIVER_NAME
- ": IRQ %d already in use.\n",
- irq);
- return retval;
- }
- #ifndef LIRC_ON_SA1100
- printk(KERN_INFO LIRC_DRIVER_NAME
- ": I/O port 0x%.4x, IRQ %d.\n",
- io, irq);
- #endif
- init_timer(&timerlist);
- timerlist.function = sir_timeout;
- timerlist.data = 0xabadcafe;
- return 0;
- }
- static void drop_port(void)
- {
- free_irq(irq, NULL);
- del_timer_sync(&timerlist);
- #ifndef LIRC_ON_SA1100
- release_region(io, 8);
- #endif
- }
- #ifdef LIRC_SIR_ACTISYS_ACT200L
- /* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
- /* some code borrowed from Linux IRDA driver */
- /* Register 0: Control register #1 */
- #define ACT200L_REG0 0x00
- #define ACT200L_TXEN 0x01 /* Enable transmitter */
- #define ACT200L_RXEN 0x02 /* Enable receiver */
- #define ACT200L_ECHO 0x08 /* Echo control chars */
- /* Register 1: Control register #2 */
- #define ACT200L_REG1 0x10
- #define ACT200L_LODB 0x01 /* Load new baud rate count value */
- #define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
- /* Register 3: Transmit mode register #2 */
- #define ACT200L_REG3 0x30
- #define ACT200L_B0 0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
- #define ACT200L_B1 0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
- #define ACT200L_CHSY 0x04 /* StartBit Synced 0=bittime, 1=startbit */
- /* Register 4: Output Power register */
- #define ACT200L_REG4 0x40
- #define ACT200L_OP0 0x01 /* Enable LED1C output */
- #define ACT200L_OP1 0x02 /* Enable LED2C output */
- #define ACT200L_BLKR 0x04
- /* Register 5: Receive Mode register */
- #define ACT200L_REG5 0x50
- #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
- /*.. other various IRDA bit modes, and TV remote modes..*/
- /* Register 6: Receive Sensitivity register #1 */
- #define ACT200L_REG6 0x60
- #define ACT200L_RS0 0x01 /* receive threshold bit 0 */
- #define ACT200L_RS1 0x02 /* receive threshold bit 1 */
- /* Register 7: Receive Sensitivity register #2 */
- #define ACT200L_REG7 0x70
- #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
- /* Register 8,9: Baud Rate Divider register #1,#2 */
- #define ACT200L_REG8 0x80
- #define ACT200L_REG9 0x90
- #define ACT200L_2400 0x5f
- #define ACT200L_9600 0x17
- #define ACT200L_19200 0x0b
- #define ACT200L_38400 0x05
- #define ACT200L_57600 0x03
- #define ACT200L_115200 0x01
- /* Register 13: Control register #3 */
- #define ACT200L_REG13 0xd0
- #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
- /* Register 15: Status register */
- #define ACT200L_REG15 0xf0
- /* Register 21: Control register #4 */
- #define ACT200L_REG21 0x50
- #define ACT200L_EXCK 0x02 /* Disable clock output driver */
- #define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
- static void init_act200(void)
- {
- int i;
- __u8 control[] = {
- ACT200L_REG15,
- ACT200L_REG13 | ACT200L_SHDW,
- ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
- ACT200L_REG13,
- ACT200L_REG7 | ACT200L_ENPOS,
- ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
- ACT200L_REG5 | ACT200L_RWIDL,
- ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
- ACT200L_REG3 | ACT200L_B0,
- ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN,
- ACT200L_REG8 | (ACT200L_115200 & 0x0f),
- ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
- ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
- };
- /* Set DLAB 1. */
- soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
- /* Set divisor to 12 => 9600 Baud */
- soutp(UART_DLM, 0);
- soutp(UART_DLL, 12);
- /* Set DLAB 0. */
- soutp(UART_LCR, UART_LCR_WLEN8);
- /* Set divisor to 12 => 9600 Baud */
- /* power supply */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- for (i = 0; i < 50; i++)
- safe_udelay(1000);
- /* Reset the dongle : set RTS low for 25 ms */
- soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
- for (i = 0; i < 25; i++)
- udelay(1000);
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- udelay(100);
- /* Clear DTR and set RTS to enter command mode */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
- udelay(7);
- /* send out the control register settings for 115K 7N1 SIR operation */
- for (i = 0; i < sizeof(control); i++) {
- soutp(UART_TX, control[i]);
- /* one byte takes ~1042 usec to transmit at 9600,8N1 */
- udelay(1500);
- }
- /* back to normal operation */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- udelay(50);
- udelay(1500);
- soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
- /* Set DLAB 1. */
- soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
- /* Set divisor to 1 => 115200 Baud */
- soutp(UART_DLM, 0);
- soutp(UART_DLL, 1);
- /* Set DLAB 0. */
- soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
- /* Set DLAB 0, 7 Bit */
- soutp(UART_LCR, UART_LCR_WLEN7);
- /* enable interrupts */
- soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
- }
- #endif
- #ifdef LIRC_SIR_ACTISYS_ACT220L
- /*
- * Derived from linux IrDA driver (net/irda/actisys.c)
- * Drop me a mail for any kind of comment: maxx@spaceboyz.net
- */
- void init_act220(void)
- {
- int i;
- /* DLAB 1 */
- soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
- /* 9600 baud */
- soutp(UART_DLM, 0);
- soutp(UART_DLL, 12);
- /* DLAB 0 */
- soutp(UART_LCR, UART_LCR_WLEN7);
- /* reset the dongle, set DTR low for 10us */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
- udelay(10);
- /* back to normal (still 9600) */
- soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
- /*
- * send RTS pulses until we reach 115200
- * i hope this is really the same for act220l/act220l+
- */
- for (i = 0; i < 3; i++) {
- udelay(10);
- /* set RTS low for 10 us */
- soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
- udelay(10);
- /* set RTS high for 10 us */
- soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
- }
- /* back to normal operation */
- udelay(1500); /* better safe than sorry ;) */
- /* Set DLAB 1. */
- soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
- /* Set divisor to 1 => 115200 Baud */
- soutp(UART_DLM, 0);
- soutp(UART_DLL, 1);
- /* Set DLAB 0, 7 Bit */
- /* The dongle doesn't seem to have any problems with operation at 7N1 */
- soutp(UART_LCR, UART_LCR_WLEN7);
- /* enable interrupts */
- soutp(UART_IER, UART_IER_RDI);
- }
- #endif
- static int init_lirc_sir(void)
- {
- int retval;
- init_waitqueue_head(&lirc_read_queue);
- retval = init_port();
- if (retval < 0)
- return retval;
- init_hardware();
- printk(KERN_INFO LIRC_DRIVER_NAME
- ": Installed.\n");
- return 0;
- }
- static int __init lirc_sir_init(void)
- {
- int retval;
- retval = init_chrdev();
- if (retval < 0)
- return retval;
- retval = init_lirc_sir();
- if (retval) {
- drop_chrdev();
- return retval;
- }
- return 0;
- }
- static void __exit lirc_sir_exit(void)
- {
- drop_hardware();
- drop_chrdev();
- drop_port();
- printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n");
- }
- module_init(lirc_sir_init);
- module_exit(lirc_sir_exit);
- #ifdef LIRC_SIR_TEKRAM
- MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
- MODULE_AUTHOR("Christoph Bartelmus");
- #elif defined(LIRC_ON_SA1100)
- MODULE_DESCRIPTION("LIRC driver for StrongARM SA1100 embedded microprocessor");
- MODULE_AUTHOR("Christoph Bartelmus");
- #elif defined(LIRC_SIR_ACTISYS_ACT200L)
- MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
- MODULE_AUTHOR("Karl Bongers");
- #elif defined(LIRC_SIR_ACTISYS_ACT220L)
- MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
- MODULE_AUTHOR("Jan Roemisch");
- #else
- MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
- MODULE_AUTHOR("Milan Pikula");
- #endif
- MODULE_LICENSE("GPL");
- #ifdef LIRC_ON_SA1100
- module_param(irq, int, S_IRUGO);
- MODULE_PARM_DESC(irq, "Interrupt (16)");
- #else
- module_param(io, int, S_IRUGO);
- MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
- module_param(irq, int, S_IRUGO);
- MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
- module_param(threshold, int, S_IRUGO);
- MODULE_PARM_DESC(threshold, "space detection threshold (3)");
- #endif
- module_param(debug, bool, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(debug, "Enable debugging messages");