diff options
Diffstat (limited to 'drivers/staging/media/lirc/lirc_sir.c')
-rw-r--r-- | drivers/staging/media/lirc/lirc_sir.c | 1279 |
1 files changed, 1279 insertions, 0 deletions
diff --git a/drivers/staging/media/lirc/lirc_sir.c b/drivers/staging/media/lirc/lirc_sir.c new file mode 100644 index 0000000..6903d39 --- /dev/null +++ b/drivers/staging/media/lirc/lirc_sir.c @@ -0,0 +1,1279 @@ +/* + * 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, 0, + 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"); |