/* * LIRC SIR driver, (C) 2000 Milan Pikula * * lirc_sir - Device driver for use with SIR (serial infra red) * mode of IrDA on many notebooks. * * 2000/09/16 Frank Przybylski : * added timeout and relaxed pulse detection, removed gap bug * * 2000/12/15 Christoph Bartelmus : * 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 : * added support for StrongARM SA1100 embedded microprocessor * parts cut'n'pasted from sa1100_ir.c (C) 2000 Russell King */ #include #if LINUX_VERSION_CODE >= 0x020100 #define KERNEL_2_1 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0) #define KERNEL_2_3 #endif #else #define KERNEL_2_0 #endif #include #include #ifdef HAVE_CONFIG_H # include #endif #include #ifdef CONFIG_SA1100_H3XXX #define LIRC_ON_IPAQ #endif #if !defined(LIRC_ON_IPAQ) && !defined(CONFIG_SERIAL_MODULE) #warning "******************************************" #warning " Your serial port driver is compiled into " #warning " the kernel. You will have to release the " #warning " port you want to use for LIRC with: " #warning " setserial /dev/ttySx uart none " #warning "******************************************" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef KERNEL_2_1 #include #endif #include #include #include #include #include #ifdef LIRC_ON_IPAQ #include #endif #include #include "lirc.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 milli seconds = 87ms*/ #define TIME_CONST (10000000ul/115200ul) #endif /******************************** iPAQ ********************************/ #ifdef LIRC_ON_IPAQ 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_IPAQ_TRANSMITTER_LATENCY 0 /* pulse/space ratio of 50/50 */ unsigned long pulse_width = (13-LIRC_ON_IPAQ_TRANSMITTER_LATENCY); /* 1000000/freq-pulse_width */ unsigned long space_width = (13-LIRC_ON_IPAQ_TRANSMITTER_LATENCY); unsigned int freq = 38000; /* modulation frequency */ unsigned int duty_cycle = 50; /* duty cycle of 50% */ #endif #define RBUF_LEN 1024 #define WBUF_LEN 1024 #define LIRC_DRIVER_NAME "lirc_sir" #ifndef LIRC_SIR_TEKRAM #define PULSE '[' /* 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) static int major = LIRC_MAJOR; #ifdef CONFIG_DEVFS_FS static devfs_handle_t devfs_lirc; #endif #ifndef LIRC_ON_IPAQ static int iobase = LIRC_PORT; static int irq = LIRC_IRQ; #endif static spinlock_t timer_lock = SPIN_LOCK_UNLOCKED; 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 = 0; #ifdef KERNEL_2_3 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue); #else static struct wait_queue * lirc_read_queue = NULL; #endif static spinlock_t hardware_lock = SPIN_LOCK_UNLOCKED; static spinlock_t dev_lock = SPIN_LOCK_UNLOCKED; static lirc_t rx_buf[RBUF_LEN]; unsigned int rx_tail = 0, rx_head = 0; #ifndef LIRC_SIR_TEKRAM static lirc_t tx_buf[WBUF_LEN]; #endif /* SECTION: Prototypes */ /* Communication with user-space */ static int lirc_open(struct inode * inode, struct file * file); #ifdef KERNEL_2_1 static int lirc_close(struct inode * inode, struct file *file); static unsigned int lirc_poll(struct file * file, poll_table * wait); #else static void lirc_close(struct inode * inode, struct file *file); static int lirc_select(struct inode * inode, struct file * file, int type, select_table * wait); #endif 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 int lirc_ioctl(struct inode *node,struct file *filep,unsigned int cmd, unsigned long arg); static void add_read_queue(int flag, unsigned long val); #ifdef MODULE static int init_chrdev(void); static void drop_chrdev(void); #endif /* Hardware */ static void sir_interrupt(int irq, void * dev_id, struct pt_regs * regs); #ifndef LIRC_SIR_TEKRAM static void send_space(unsigned long len); static void send_pulse(unsigned long len); #endif static int init_hardware(void); static void drop_hardware(void); /* Initialisation */ static int init_port(void); static void drop_port(void); int init_module(void); void cleanup_module(void); #ifdef LIRC_ON_IPAQ void inline on(void) { PPSR|=PPC_TXD2; } void inline off(void) { PPSR&=~PPC_TXD2; } #else static inline unsigned int sinp(int offset) { return inb(iobase + offset); } static inline void soutp(int offset, int value) { outb(value, iobase + offset); } #endif /* SECTION: Communication with user-space */ static int lirc_open(struct inode * inode, struct file * file) { spin_lock(&dev_lock); if (MOD_IN_USE) { spin_unlock(&dev_lock); return -EBUSY; } MOD_INC_USE_COUNT; spin_unlock(&dev_lock); return 0; } #ifdef KERNEL_2_1 static int lirc_close(struct inode * inode, struct file *file) #else static void lirc_close(struct inode * inode, struct file *file) #endif { MOD_DEC_USE_COUNT; #ifdef KERNEL_2_1 return 0; #endif } #ifdef KERNEL_2_1 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; } #else static int lirc_select(struct inode * inode, struct file * file, int type, select_table * wait) { if (type != SEL_IN) return 0; if (rx_head != rx_tail) return 1; select_wait(&lirc_read_queue, wait); return 0; } #endif static ssize_t lirc_read(struct file * file, char * buf, size_t count, loff_t * ppos) { int i = 0; int retval = 0; unsigned long flags; while (i < count) { save_flags(flags); cli(); if (rx_head != rx_tail) { retval = verify_area(VERIFY_WRITE, (void *)buf + i, sizeof(lirc_t)); if (retval) { restore_flags(flags); return retval; } #ifdef KERNEL_2_1 copy_to_user((void *)buf + i, (void *)(rx_buf + rx_head), sizeof(lirc_t)); #else memcpy_tofs((void *)buf + i, (void *)(rx_buf + rx_head), sizeof(lirc_t)); #endif rx_head = (rx_head + 1) & (RBUF_LEN - 1); i+=sizeof(lirc_t); restore_flags(flags); } else { restore_flags(flags); if (file->f_flags & O_NONBLOCK) { retval = -EAGAIN; break; } interruptible_sleep_on(&lirc_read_queue); if (signal_pending(current)) { retval = -ERESTARTSYS; break; } } } if (i) return i; return retval; } static ssize_t lirc_write(struct file * file, const char * buf, size_t n, loff_t * pos) { #ifdef LIRC_SIR_TEKRAM return(-EBADF); #else int i; int retval; if(n%sizeof(lirc_t) || (n/sizeof(lirc_t)) > WBUF_LEN) return(-EINVAL); retval = verify_area(VERIFY_READ, buf, n); if (retval) return retval; copy_from_user(tx_buf, buf, n); i = 0; n/=sizeof(lirc_t); #ifdef LIRC_ON_IPAQ /* disable receiver */ Ser2UTCR3=0; #endif while (1) { if (i >= n) break; if (tx_buf[i]) send_pulse(tx_buf[i]); i++; if (i >= n) break; if (tx_buf[i]) send_space(tx_buf[i]); i++; } #ifdef LIRC_ON_IPAQ 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 return n; #endif } static int lirc_ioctl(struct inode *node,struct file *filep,unsigned int cmd, unsigned long arg) { int retval = 0; unsigned long value = 0; unsigned int ivalue; #ifdef LIRC_SIR_TEKRAM if (cmd == LIRC_GET_FEATURES) value = LIRC_CAN_REC_MODE2; else if (cmd == LIRC_GET_SEND_MODE) value = 0; else if (cmd == LIRC_GET_REC_MODE) value = LIRC_MODE_MODE2; #elif defined(LIRC_ON_IPAQ) 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: #ifdef KERNEL_2_0 retval = verify_area(VERIFY_WRITE, (unsigned long *) arg, sizeof(unsigned long)); if (retval) break; #else retval = #endif put_user(value, (unsigned long *) arg); break; case LIRC_SET_SEND_MODE: case LIRC_SET_REC_MODE: #ifdef KERNEL_2_0 retval = verify_area(VERIFY_READ, (unsigned long *) arg, sizeof(unsigned long)); if (retval) break; value = get_user((unsigned long *) arg); #else retval = get_user(value, (unsigned long *) arg); #endif break; #ifdef LIRC_ON_IPAQ case LIRC_SET_SEND_DUTY_CYCLE: # ifdef KERNEL_2_1 retval=get_user(ivalue,(unsigned int *) arg); if(retval) return(retval); # else retval=verify_area(VERIFY_READ,(unsigned int *) arg, sizeof(unsigned int)); if(result) return(result); ivalue=get_user((unsigned int *) arg); # endif if(ivalue<=0 || ivalue>100) return(-EINVAL); /* (ivalue/100)*(1000000/freq) */ duty_cycle=ivalue; pulse_width=(unsigned long) duty_cycle*10000/freq; space_width=(unsigned long) 1000000L/freq-pulse_width; if(pulse_width>=LIRC_ON_IPAQ_TRANSMITTER_LATENCY) pulse_width-=LIRC_ON_IPAQ_TRANSMITTER_LATENCY; if(space_width>=LIRC_ON_IPAQ_TRANSMITTER_LATENCY) space_width-=LIRC_ON_IPAQ_TRANSMITTER_LATENCY; break; case LIRC_SET_SEND_CARRIER: # ifdef KERNEL_2_1 retval=get_user(ivalue,(unsigned int *) arg); if(retval) return(retval); # else retval=verify_area(VERIFY_READ,(unsigned int *) arg, sizeof(unsigned int)); if(retval) return(retval); ivalue=get_user((unsigned int *) arg); # endif if(ivalue>500000 || ivalue<20000) return(-EINVAL); freq=ivalue; pulse_width=(unsigned long) duty_cycle*10000/freq; space_width=(unsigned long) 1000000L/freq-pulse_width; if(pulse_width>=LIRC_ON_IPAQ_TRANSMITTER_LATENCY) pulse_width-=LIRC_ON_IPAQ_TRANSMITTER_LATENCY; if(space_width>=LIRC_ON_IPAQ_TRANSMITTER_LATENCY) space_width-=LIRC_ON_IPAQ_TRANSMITTER_LATENCY; break; #endif default: retval = -ENOIOCTLCMD; } if (retval) return retval; #ifdef LIRC_SIR_TEKRAM if (cmd == LIRC_SET_REC_MODE) { if (value != LIRC_MODE_MODE2) retval = -ENOSYS; } else if (cmd == LIRC_SET_SEND_MODE) { retval = -ENOSYS; } #else 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; } #endif return retval; } static void add_read_queue(int flag, unsigned long val) { unsigned int new_rx_tail; lirc_t newval; #ifdef DEBUG_SIGNAL printk(KERN_DEBUG LIRC_DRIVER_NAME ": add flag %d with val %lu\n", flag,val); #endif newval = val & PULSE_MASK; /* statistically pulses are ~TIME_CONST/2 too long: we could maybe make this more exactly 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) { # ifdef DEBUG printk(KERN_WARNING LIRC_DRIVER_NAME ": Buffer overrun.\n"); # endif return; } rx_buf[rx_tail] = newval; rx_tail = new_rx_tail; wake_up_interruptible(&lirc_read_queue); } static struct file_operations lirc_fops = { read: lirc_read, write: lirc_write, #ifdef KERNEL_2_1 poll: lirc_poll, #else select: lirc_select, #endif ioctl: lirc_ioctl, open: lirc_open, release: lirc_close, }; #ifdef MODULE int init_chrdev(void) { int retval; retval = devfs_register_chrdev(major, LIRC_DRIVER_NAME, &lirc_fops); if (retval < 0) { printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n"); return retval; } #ifdef CONFIG_DEVFS_FS devfs_lirc = devfs_register( NULL, "lirc", DEVFS_FL_DEFAULT, major, 0, S_IFCHR | S_IRUSR | S_IWUSR, &lirc_fops, NULL ); #endif return 0; } static void drop_chrdev(void) { unregister_chrdev(major, LIRC_DRIVER_NAME); #ifdef CONFIG_DEVFS_FS devfs_unregister(devfs_lirc); #endif } #endif /* 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_IPAQ /* clear unread bits in UART and restart */ outb(UART_FCR_CLEAR_RCVR, iobase + UART_FCR); #endif /* determine 'virtual' pulse end: */ pulse_end = delta(&last_tv, &last_intr_tv); #ifdef DEBUG_SIGNAL printk(KERN_DEBUG LIRC_DRIVER_NAME ": timeout add %d for %lu usec\n",last_value,pulse_end); #endif add_read_queue(last_value,pulse_end); last_value = 0; last_tv=last_intr_tv; } spin_unlock_irqrestore(&timer_lock, flags); } static void sir_interrupt(int irq, void * dev_id, struct pt_regs * regs) { unsigned char data; struct timeval curr_tv; static unsigned long deltv; #ifdef LIRC_ON_IPAQ int status; static int n=0; //printk("interrupt\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; #ifdef DEBUG printk("EIF\n"); bstat = Ser2UTSR1; if (bstat & UTSR1_FRE) printk("frame error\n"); if (bstat & UTSR1_ROR) printk("receive fifo overrun\n"); if(bstat&UTSR1_PRE) printk("parity error\n"); #endif bstat = Ser2UTDR; n++; status = Ser2UTSR0; } if (status & (UTSR0_RFS | UTSR0_RID)) { do_gettimeofday(&curr_tv); deltv = delta(&last_tv, &curr_tv); do { #ifdef DEBUG_SIGNAL printk(KERN_DEBUG LIRC_DRIVER_NAME": t %lu , d %d\n", deltintrtv,(int)data); #endif data=Ser2UTDR; //printk("data: %d\n",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) { //printk("add\n"); 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("transmit fifo not full, shouldn't ever 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(iobase + UART_IIR) & UART_IIR_ID)) { switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */ case UART_IIR_MSI: (void) inb(iobase + UART_MSR); break; case UART_IIR_RLSI: (void) inb(iobase + UART_LSR); break; case UART_IIR_THRI: #if 0 if (lsr & UART_LSR_THRE) /* FIFO is empty */ outb(data, iobase + UART_TX) #endif break; case UART_IIR_RDI: /* avoid interference with timer */ spin_lock_irqsave(&timer_lock, flags); do { del_timer(&timerlist); data = inb(iobase + UART_RX); do_gettimeofday(&curr_tv); deltv = delta(&last_tv, &curr_tv); deltintrtv = delta(&last_intr_tv, &curr_tv); #ifdef DEBUG_SIGNAL printk(KERN_DEBUG LIRC_DRIVER_NAME": t %lu , d %d\n",deltintrtv,(int)data); #endif /* if nothing came in last 2 cycles, it was gap */ if (deltintrtv > TIME_CONST * 2) { if (last_value) { #ifdef DEBUG_SIGNAL printk(KERN_DEBUG LIRC_DRIVER_NAME ": GAP\n"); #endif /* 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); } } while ((lsr = inb(iobase + UART_LSR)) & UART_LSR_DR); /* data ready */ spin_unlock_irqrestore(&timer_lock, flags); break; default: break; } } #endif } #ifdef LIRC_ON_IPAQ 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 0) udelay(time_left); #endif } #endif static int init_hardware(void) { int flags; spin_lock_irqsave(&hardware_lock, flags); /* reset UART */ #ifdef LIRC_ON_IPAQ #ifdef CONFIG_SA1100_H3600 if (machine_is_h3600()) { printk("Power on IR module\n"); #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,15) set_h3600_egpio(EGPIO_H3600_IR_ON); #else assign_h3600_egpio(IPAQ_EGPIO_IR_ON, 1); #endif } #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); 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, iobase + UART_MCR); outb(0, iobase + UART_IER); /* init UART */ /* set DLAB, speed = 115200 */ outb(UART_LCR_DLAB | UART_LCR_WLEN7, iobase + UART_LCR); outb(1, iobase + UART_DLL); outb(0, iobase + UART_DLM); /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */ outb(UART_LCR_WLEN7, iobase + UART_LCR); /* FIFO operation */ outb(UART_FCR_ENABLE_FIFO, iobase + UART_FCR); /* interrupts */ // outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, iobase + UART_IER); outb(UART_IER_RDI, iobase + UART_IER); /* turn on UART */ outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, iobase + UART_MCR); #endif spin_unlock_irqrestore(&hardware_lock, flags); return 0; } static void drop_hardware(void) { int flags; spin_lock_irqsave(&hardware_lock, flags); #ifdef LIRC_ON_IPAQ Ser2UTCR3=0; Ser2UTCR0=sr.utcr0; Ser2UTCR1=sr.utcr1; Ser2UTCR2=sr.utcr2; Ser2UTCR4=sr.utcr4; Ser2UTCR3=sr.utcr3; Ser2HSCR0=sr.hscr0; #ifdef CONFIG_SA1100_H3600 if (machine_is_h3600()) { assign_h3600_egpio(IPAQ_EGPIO_IR_ON, 0); } #endif #else /* turn off interrupts */ outb(0, iobase + UART_IER); #endif spin_unlock_irqrestore(&hardware_lock, flags); } /* SECTION: Initialisation */ static int init_port(void) { int retval; #ifndef LIRC_ON_IPAQ /* get I/O port access and IRQ line */ retval = check_region(iobase, 8); if (retval < 0) { printk(KERN_ERR LIRC_DRIVER_NAME ": i/o port 0x%.4x already in use.\n", iobase); return retval; } #endif retval = request_irq(irq, sir_interrupt, SA_INTERRUPT, LIRC_DRIVER_NAME, NULL); if (retval < 0) { printk(KERN_ERR LIRC_DRIVER_NAME ": IRQ %d already in use.\n", irq); return retval; } #ifndef LIRC_ON_IPAQ request_region(iobase, 8, LIRC_DRIVER_NAME); printk(KERN_INFO LIRC_DRIVER_NAME ": I/O port 0x%.4x, IRQ %d.\n", iobase, irq); #endif init_timer(&timerlist); timerlist.function = sir_timeout; timerlist.data = 0xabadcafe; return 0; } static void drop_port(void) { disable_irq(irq); free_irq(irq, NULL); #ifndef LIRC_ON_IPAQ release_region(iobase, 8); #endif } int init_lirc_sir(void) { int retval; #ifdef KERNEL_2_3 init_waitqueue_head(&lirc_read_queue); #endif retval = init_port(); if (retval < 0) return retval; init_hardware(); enable_irq(irq); printk(KERN_INFO LIRC_DRIVER_NAME ": Installed.\n"); return 0; } #ifdef MODULE #ifdef KERNEL_2_1 #ifdef LIRC_SIR_TEKRAM MODULE_AUTHOR("Christoph Bartelmus"); MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210"); #else #ifdef LIRC_ON_IPAQ MODULE_AUTHOR("Christoph Bartelmus"); MODULE_DESCRIPTION("LIRC driver for StrongARM SA1100 embedded microprocessor"); #else MODULE_AUTHOR("Milan Pikula"); MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports"); #endif #endif #ifdef LIRC_ON_IPAQ MODULE_PARM(irq, "i"); MODULE_PARM_DESC(irq, "Interrupt (16)"); #else MODULE_PARM(iobase, "i"); MODULE_PARM_DESC(iobase, "I/O address base (0x3f8 or 0x2f8)"); MODULE_PARM(irq, "i"); MODULE_PARM_DESC(irq, "Interrupt (4 or 3)"); #endif EXPORT_NO_SYMBOLS; #endif int init_module(void) { int retval; retval=init_chrdev(); if(retval < 0) return retval; retval = init_lirc_sir(); if (retval) { drop_chrdev(); return retval; } return 0; } void cleanup_module(void) { drop_hardware(); drop_chrdev(); drop_port(); printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n"); } #endif