From patchwork Mon Jul 26 23:30:02 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarod Wilson X-Patchwork-Id: 114386 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o6QNV6XE028957 for ; Mon, 26 Jul 2010 23:31:06 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755412Ab0GZXaI (ORCPT ); Mon, 26 Jul 2010 19:30:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:9198 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755216Ab0GZXaE (ORCPT ); Mon, 26 Jul 2010 19:30:04 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o6QNU4qS024349 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 26 Jul 2010 19:30:04 -0400 Received: from ihatethathostname.lab.bos.redhat.com (ihatethathostname.lab.bos.redhat.com [10.16.43.238]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o6QNU3GO003323 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 26 Jul 2010 19:30:03 -0400 Received: from ihatethathostname.lab.bos.redhat.com (ihatethathostname.lab.bos.redhat.com [127.0.0.1]) by ihatethathostname.lab.bos.redhat.com (8.14.4/8.14.3) with ESMTP id o6QNU2tq021435; Mon, 26 Jul 2010 19:30:03 -0400 Received: (from jarod@localhost) by ihatethathostname.lab.bos.redhat.com (8.14.4/8.14.4/Submit) id o6QNU24D021434; Mon, 26 Jul 2010 19:30:02 -0400 X-Authentication-Warning: ihatethathostname.lab.bos.redhat.com: jarod set sender to jarod@redhat.com using -f Date: Mon, 26 Jul 2010 19:30:02 -0400 From: Jarod Wilson To: linux-kernel@vger.kernel.org Cc: linux-media@vger.kernel.org, linux-input@vger.kernel.org Subject: [PATCH 06/15] staging/lirc: add lirc_it87 driver Message-ID: <20100726233002.GG21225@redhat.com> References: <20100726232546.GA21225@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20100726232546.GA21225@redhat.com> User-Agent: Mutt/1.5.20 (2009-12-10) X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Mon, 26 Jul 2010 23:31:06 +0000 (UTC) diff --git a/drivers/staging/lirc/lirc_it87.c b/drivers/staging/lirc/lirc_it87.c new file mode 100644 index 0000000..781abc3 --- /dev/null +++ b/drivers/staging/lirc/lirc_it87.c @@ -0,0 +1,1019 @@ +/* + * LIRC driver for ITE IT8712/IT8705 CIR port + * + * Copyright (C) 2001 Hans-Gunter Lutke Uphues + * + * 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 + * + * ITE IT8705 and IT8712(not tested) and IT8720 CIR-port support for lirc based + * via cut and paste from lirc_sir.c (C) 2000 Milan Pikula + * + * Attention: Sendmode only tested with debugging logs + * + * 2001/02/27 Christoph Bartelmus : + * reimplemented read function + * 2005/06/05 Andrew Calkin implemented support for Asus Digimatrix, + * based on work of the following member of the Outertrack Digimatrix + * Forum: Art103 + * 2009/12/24 James Edwards implemeted support + * for ITE8704/ITE8718, on my machine, the DSDT reports 8704, but the + * chip identifies as 18. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include "lirc_it87.h" + +#ifdef LIRC_IT87_DIGIMATRIX +static int digimatrix = 1; +static int it87_freq = 36; /* kHz */ +static int irq = 9; +#else +static int digimatrix; +static int it87_freq = 38; /* kHz */ +static int irq = IT87_CIR_DEFAULT_IRQ; +#endif + +static unsigned long it87_bits_in_byte_out; +static unsigned long it87_send_counter; +static unsigned char it87_RXEN_mask = IT87_CIR_RCR_RXEN; + +#define RBUF_LEN 1024 + +#define LIRC_DRIVER_NAME "lirc_it87" + +/* timeout for sequences in jiffies (=5/100s) */ +/* must be longer than TIME_CONST */ +#define IT87_TIMEOUT (HZ*5/100) + +/* module parameters */ +static int debug; +#define dprintk(fmt, args...) \ + do { \ + if (debug) \ + printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \ + fmt, ## args); \ + } while (0) + +static int io = IT87_CIR_DEFAULT_IOBASE; +/* receiver demodulator default: off */ +static int it87_enable_demodulator; + +static int timer_enabled; +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 DEFINE_SPINLOCK(dev_lock); + +static int rx_buf[RBUF_LEN]; +unsigned int rx_tail, rx_head; + +static struct pnp_driver it87_pnp_driver; + +/* SECTION: Prototypes */ + +/* Communication with user-space */ +static int lirc_open(struct inode *inode, struct file *file); +static int lirc_close(struct inode *inode, struct file *file); +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 it87_interrupt(int irq, void *dev_id); +static void send_space(unsigned long len); +static void send_pulse(unsigned long len); +static void init_send(void); +static void terminate_send(unsigned long len); +static int init_hardware(void); +static void drop_hardware(void); +/* Initialisation */ +static int init_port(void); +static void drop_port(void); + + +/* SECTION: Communication with user-space */ + +static int lirc_open(struct inode *inode, struct file *file) +{ + spin_lock(&dev_lock); + if (module_refcount(THIS_MODULE)) { + spin_unlock(&dev_lock); + return -EBUSY; + } + spin_unlock(&dev_lock); + return 0; +} + + +static int lirc_close(struct inode *inode, struct file *file) +{ + return 0; +} + + +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; + + while (n < count) { + if (file->f_flags & O_NONBLOCK && rx_head == rx_tail) { + retval = -EAGAIN; + break; + } + retval = wait_event_interruptible(lirc_read_queue, + rx_head != rx_tail); + if (retval) + break; + + 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); + } + if (n) + return n; + return retval; +} + + +static ssize_t lirc_write(struct file *file, const char *buf, + size_t n, loff_t *pos) +{ + int i = 0; + int *tx_buf; + + if (n % sizeof(int)) + return -EINVAL; + tx_buf = memdup_user(buf, n); + if (IS_ERR(tx_buf)) + return PTR_ERR(tx_buf); + n /= sizeof(int); + init_send(); + 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++; + } + terminate_send(tx_buf[i - 1]); + return n; +} + + +static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) +{ + int retval = 0; + unsigned long value = 0; + unsigned int ivalue; + unsigned long hw_flags; + + if (cmd == LIRC_GET_FEATURES) + value = LIRC_CAN_SEND_PULSE | + 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; + + switch (cmd) { + case LIRC_GET_FEATURES: + case LIRC_GET_SEND_MODE: + case LIRC_GET_REC_MODE: + retval = put_user(value, (unsigned long *) arg); + break; + + case LIRC_SET_SEND_MODE: + case LIRC_SET_REC_MODE: + retval = get_user(value, (unsigned long *) arg); + break; + + case LIRC_SET_SEND_CARRIER: + retval = get_user(ivalue, (unsigned int *) arg); + if (retval) + return retval; + ivalue /= 1000; + if (ivalue > IT87_CIR_FREQ_MAX || + ivalue < IT87_CIR_FREQ_MIN) + return -EINVAL; + + it87_freq = ivalue; + + spin_lock_irqsave(&hardware_lock, hw_flags); + outb(((inb(io + IT87_CIR_TCR2) & IT87_CIR_TCR2_TXMPW) | + (it87_freq - IT87_CIR_FREQ_MIN) << 3), + io + IT87_CIR_TCR2); + spin_unlock_irqrestore(&hardware_lock, hw_flags); + dprintk("demodulation frequency: %d kHz\n", it87_freq); + + break; + + default: + retval = -EINVAL; + } + + 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 struct file_operations lirc_fops = { + .owner = THIS_MODULE, + .read = lirc_read, + .write = lirc_write, + .poll = lirc_poll, + .unlocked_ioctl = lirc_ioctl, + .open = lirc_open, + .release = lirc_close, +}; + +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, +}; + + +#ifdef 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); +} +#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 it87_timeout(unsigned long data) +{ + unsigned long flags; + + /* avoid interference with interrupt */ + spin_lock_irqsave(&timer_lock, flags); + + if (digimatrix) { + /* We have timed out. Disable the RX mechanism. */ + + outb((inb(io + IT87_CIR_RCR) & ~IT87_CIR_RCR_RXEN) | + IT87_CIR_RCR_RXACT, io + IT87_CIR_RCR); + if (it87_RXEN_mask) + outb(inb(io + IT87_CIR_RCR) | IT87_CIR_RCR_RXEN, + io + IT87_CIR_RCR); + dprintk(" TIMEOUT\n"); + timer_enabled = 0; + + /* fifo clear */ + outb(inb(io + IT87_CIR_TCR1) | IT87_CIR_TCR1_FIFOCLR, + io+IT87_CIR_TCR1); + + } else { + /* + * 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. + */ + + if (last_value) { + unsigned long pulse_end; + + /* 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 it87_interrupt(int irq, void *dev_id) +{ + unsigned char data; + struct timeval curr_tv; + static unsigned long deltv; + unsigned long deltintrtv; + unsigned long flags, hw_flags; + int iir, lsr; + int fifo = 0; + static char lastbit; + char bit; + + /* Bit duration in microseconds */ + const unsigned long bit_duration = 1000000ul / + (115200 / IT87_CIR_BAUDRATE_DIVISOR); + + + iir = inb(io + IT87_CIR_IIR); + + switch (iir & IT87_CIR_IIR_IID) { + case 0x4: + case 0x6: + lsr = inb(io + IT87_CIR_RSR) & (IT87_CIR_RSR_RXFTO | + IT87_CIR_RSR_RXFBC); + fifo = lsr & IT87_CIR_RSR_RXFBC; + dprintk("iir: 0x%x fifo: 0x%x\n", iir, lsr); + + /* avoid interference with timer */ + spin_lock_irqsave(&timer_lock, flags); + spin_lock_irqsave(&hardware_lock, hw_flags); + if (digimatrix) { + static unsigned long acc_pulse; + static unsigned long acc_space; + + do { + data = inb(io + IT87_CIR_DR); + data = ~data; + fifo--; + if (data != 0x00) { + if (timer_enabled) + del_timer(&timerlist); + /* + * start timer for end of + * sequence detection + */ + timerlist.expires = jiffies + + IT87_TIMEOUT; + add_timer(&timerlist); + timer_enabled = 1; + } + /* Loop through */ + for (bit = 0; bit < 8; ++bit) { + if ((data >> bit) & 1) { + ++acc_pulse; + if (lastbit == 0) { + add_read_queue(0, + acc_space * + bit_duration); + acc_space = 0; + } + } else { + ++acc_space; + if (lastbit == 1) { + add_read_queue(1, + acc_pulse * + bit_duration); + acc_pulse = 0; + } + } + lastbit = (data >> bit) & 1; + } + + } while (fifo != 0); + } else { /* Normal Operation */ + do { + del_timer(&timerlist); + data = inb(io + IT87_CIR_DR); + + dprintk("data=%02x\n", data); + 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 2 cycles, + * it was gap + */ + if (deltintrtv > TIME_CONST * 2) { + 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 + IT87_TIMEOUT; + add_timer(&timerlist); + } + outb((inb(io + IT87_CIR_RCR) & + ~IT87_CIR_RCR_RXEN) | + IT87_CIR_RCR_RXACT, + io + IT87_CIR_RCR); + if (it87_RXEN_mask) + outb(inb(io + IT87_CIR_RCR) | + IT87_CIR_RCR_RXEN, + io + IT87_CIR_RCR); + fifo--; + } while (fifo != 0); + } + spin_unlock_irqrestore(&hardware_lock, hw_flags); + spin_unlock_irqrestore(&timer_lock, flags); + + return IRQ_RETVAL(IRQ_HANDLED); + + default: + /* not our irq */ + dprintk("unknown IRQ (shouldn't happen) !!\n"); + return IRQ_RETVAL(IRQ_NONE); + } +} + + +static void send_it87(unsigned long len, unsigned long stime, + unsigned char send_byte, unsigned int count_bits) +{ + long count = len / stime; + long time_left = 0; + static unsigned char byte_out; + unsigned long hw_flags; + + dprintk("%s: len=%ld, sb=%d\n", __func__, len, send_byte); + + time_left = (long)len - (long)count * (long)stime; + count += ((2 * time_left) / stime); + while (count) { + long i = 0; + for (i = 0; i < count_bits; i++) { + byte_out = (byte_out << 1) | (send_byte & 1); + it87_bits_in_byte_out++; + } + if (it87_bits_in_byte_out == 8) { + dprintk("out=0x%x, tsr_txfbc: 0x%x\n", + byte_out, + inb(io + IT87_CIR_TSR) & + IT87_CIR_TSR_TXFBC); + + while ((inb(io + IT87_CIR_TSR) & + IT87_CIR_TSR_TXFBC) >= IT87_CIR_FIFO_SIZE) + ; + + spin_lock_irqsave(&hardware_lock, hw_flags); + outb(byte_out, io + IT87_CIR_DR); + spin_unlock_irqrestore(&hardware_lock, hw_flags); + + it87_bits_in_byte_out = 0; + it87_send_counter++; + byte_out = 0; + } + count--; + } +} + + +/*TODO: maybe exchange space and pulse because it8705 only modulates 0-bits */ + +static void send_space(unsigned long len) +{ + send_it87(len, TIME_CONST, IT87_CIR_SPACE, IT87_CIR_BAUDRATE_DIVISOR); +} + +static void send_pulse(unsigned long len) +{ + send_it87(len, TIME_CONST, IT87_CIR_PULSE, IT87_CIR_BAUDRATE_DIVISOR); +} + + +static void init_send() +{ + unsigned long flags; + + spin_lock_irqsave(&hardware_lock, flags); + /* RXEN=0: receiver disable */ + it87_RXEN_mask = 0; + outb(inb(io + IT87_CIR_RCR) & ~IT87_CIR_RCR_RXEN, + io + IT87_CIR_RCR); + spin_unlock_irqrestore(&hardware_lock, flags); + it87_bits_in_byte_out = 0; + it87_send_counter = 0; +} + + +static void terminate_send(unsigned long len) +{ + unsigned long flags; + unsigned long last = 0; + + last = it87_send_counter; + /* make sure all necessary data has been sent */ + while (last == it87_send_counter) + send_space(len); + /* wait until all data sent */ + while ((inb(io + IT87_CIR_TSR) & IT87_CIR_TSR_TXFBC) != 0) + ; + /* then re-enable receiver */ + spin_lock_irqsave(&hardware_lock, flags); + it87_RXEN_mask = IT87_CIR_RCR_RXEN; + outb(inb(io + IT87_CIR_RCR) | IT87_CIR_RCR_RXEN, + io + IT87_CIR_RCR); + spin_unlock_irqrestore(&hardware_lock, flags); +} + + +static int init_hardware(void) +{ + unsigned long flags; + unsigned char it87_rcr = 0; + + spin_lock_irqsave(&hardware_lock, flags); + /* init cir-port */ + /* enable r/w-access to Baudrate-Register */ + outb(IT87_CIR_IER_BR, io + IT87_CIR_IER); + outb(IT87_CIR_BAUDRATE_DIVISOR % 0x100, io+IT87_CIR_BDLR); + outb(IT87_CIR_BAUDRATE_DIVISOR / 0x100, io+IT87_CIR_BDHR); + /* Baudrate Register off, define IRQs: Input only */ + if (digimatrix) { + outb(IT87_CIR_IER_IEC | IT87_CIR_IER_RFOIE, io + IT87_CIR_IER); + /* RX: HCFS=0, RXDCR = 001b (33,75..38,25 kHz), RXEN=1 */ + } else { + outb(IT87_CIR_IER_IEC | IT87_CIR_IER_RDAIE, io + IT87_CIR_IER); + /* RX: HCFS=0, RXDCR = 001b (35,6..40,3 kHz), RXEN=1 */ + } + it87_rcr = (IT87_CIR_RCR_RXEN & it87_RXEN_mask) | 0x1; + if (it87_enable_demodulator) + it87_rcr |= IT87_CIR_RCR_RXEND; + outb(it87_rcr, io + IT87_CIR_RCR); + if (digimatrix) { + /* Set FIFO depth to 1 byte, and disable TX */ + outb(inb(io + IT87_CIR_TCR1) | 0x00, + io + IT87_CIR_TCR1); + + /* + * TX: it87_freq (36kHz), 'reserved' sensitivity + * setting (0x00) + */ + outb(((it87_freq - IT87_CIR_FREQ_MIN) << 3) | 0x00, + io + IT87_CIR_TCR2); + } else { + /* TX: 38kHz, 13,3us (pulse-width) */ + outb(((it87_freq - IT87_CIR_FREQ_MIN) << 3) | 0x06, + io + IT87_CIR_TCR2); + } + spin_unlock_irqrestore(&hardware_lock, flags); + return 0; +} + + +static void drop_hardware(void) +{ + unsigned long flags; + + spin_lock_irqsave(&hardware_lock, flags); + disable_irq(irq); + /* receiver disable */ + it87_RXEN_mask = 0; + outb(0x1, io + IT87_CIR_RCR); + /* turn off irqs */ + outb(0, io + IT87_CIR_IER); + /* fifo clear */ + outb(IT87_CIR_TCR1_FIFOCLR, io+IT87_CIR_TCR1); + /* reset */ + outb(IT87_CIR_IER_RESET, io+IT87_CIR_IER); + enable_irq(irq); + spin_unlock_irqrestore(&hardware_lock, flags); +} + + +static unsigned char it87_read(unsigned char port) +{ + outb(port, IT87_ADRPORT); + return inb(IT87_DATAPORT); +} + + +static void it87_write(unsigned char port, unsigned char data) +{ + outb(port, IT87_ADRPORT); + outb(data, IT87_DATAPORT); +} + + +/* SECTION: Initialisation */ + +static int init_port(void) +{ + unsigned long hw_flags; + int retval = 0; + + unsigned char init_bytes[4] = IT87_INIT; + unsigned char it87_chipid = 0; + unsigned char ldn = 0; + unsigned int it87_io = 0; + unsigned int it87_irq = 0; + + /* Enter MB PnP Mode */ + outb(init_bytes[0], IT87_ADRPORT); + outb(init_bytes[1], IT87_ADRPORT); + outb(init_bytes[2], IT87_ADRPORT); + outb(init_bytes[3], IT87_ADRPORT); + + /* 8712 or 8705 ? */ + it87_chipid = it87_read(IT87_CHIP_ID1); + if (it87_chipid != 0x87) { + retval = -ENXIO; + return retval; + } + it87_chipid = it87_read(IT87_CHIP_ID2); + if ((it87_chipid != 0x05) && + (it87_chipid != 0x12) && + (it87_chipid != 0x18) && + (it87_chipid != 0x20)) { + printk(KERN_INFO LIRC_DRIVER_NAME + ": no IT8704/05/12/18/20 found (claimed IT87%02x), " + "exiting..\n", it87_chipid); + retval = -ENXIO; + return retval; + } + printk(KERN_INFO LIRC_DRIVER_NAME + ": found IT87%02x.\n", + it87_chipid); + + /* get I/O-Port and IRQ */ + if (it87_chipid == 0x12 || it87_chipid == 0x18) + ldn = IT8712_CIR_LDN; + else + ldn = IT8705_CIR_LDN; + it87_write(IT87_LDN, ldn); + + it87_io = it87_read(IT87_CIR_BASE_MSB) * 256 + + it87_read(IT87_CIR_BASE_LSB); + if (it87_io == 0) { + if (io == 0) + io = IT87_CIR_DEFAULT_IOBASE; + printk(KERN_INFO LIRC_DRIVER_NAME + ": set default io 0x%x\n", + io); + it87_write(IT87_CIR_BASE_MSB, io / 0x100); + it87_write(IT87_CIR_BASE_LSB, io % 0x100); + } else + io = it87_io; + + it87_irq = it87_read(IT87_CIR_IRQ); + if (digimatrix || it87_irq == 0) { + if (irq == 0) + irq = IT87_CIR_DEFAULT_IRQ; + printk(KERN_INFO LIRC_DRIVER_NAME + ": set default irq 0x%x\n", + irq); + it87_write(IT87_CIR_IRQ, irq); + } else + irq = it87_irq; + + spin_lock_irqsave(&hardware_lock, hw_flags); + /* reset */ + outb(IT87_CIR_IER_RESET, io+IT87_CIR_IER); + /* fifo clear */ + outb(IT87_CIR_TCR1_FIFOCLR | + /* IT87_CIR_TCR1_ILE | */ + IT87_CIR_TCR1_TXRLE | + IT87_CIR_TCR1_TXENDF, io+IT87_CIR_TCR1); + spin_unlock_irqrestore(&hardware_lock, hw_flags); + + /* get I/O port access and IRQ line */ + 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); + /* Leaving MB PnP Mode */ + it87_write(IT87_CFGCTRL, 0x2); + return -EBUSY; + } + + /* activate CIR-Device */ + it87_write(IT87_CIR_ACT, 0x1); + + /* Leaving MB PnP Mode */ + it87_write(IT87_CFGCTRL, 0x2); + + retval = request_irq(irq, it87_interrupt, 0 /*IRQF_DISABLED*/, + LIRC_DRIVER_NAME, NULL); + if (retval < 0) { + printk(KERN_ERR LIRC_DRIVER_NAME + ": IRQ %d already in use.\n", + irq); + release_region(io, 8); + return retval; + } + + printk(KERN_INFO LIRC_DRIVER_NAME + ": I/O port 0x%.4x, IRQ %d.\n", io, irq); + + init_timer(&timerlist); + timerlist.function = it87_timeout; + timerlist.data = 0xabadcafe; + + return 0; +} + + +static void drop_port(void) +{ +#if 0 + unsigned char init_bytes[4] = IT87_INIT; + + /* Enter MB PnP Mode */ + outb(init_bytes[0], IT87_ADRPORT); + outb(init_bytes[1], IT87_ADRPORT); + outb(init_bytes[2], IT87_ADRPORT); + outb(init_bytes[3], IT87_ADRPORT); + + /* deactivate CIR-Device */ + it87_write(IT87_CIR_ACT, 0x0); + + /* Leaving MB PnP Mode */ + it87_write(IT87_CFGCTRL, 0x2); +#endif + + del_timer_sync(&timerlist); + free_irq(irq, NULL); + release_region(io, 8); +} + + +static int init_lirc_it87(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 it87_probe(struct pnp_dev *pnp_dev, + const struct pnp_device_id *dev_id) +{ + int retval; + + driver.dev = &pnp_dev->dev; + + retval = init_chrdev(); + if (retval < 0) + return retval; + + retval = init_lirc_it87(); + if (retval) + goto init_lirc_it87_failed; + + return 0; + +init_lirc_it87_failed: + drop_chrdev(); + + return retval; +} + +static int __init lirc_it87_init(void) +{ + return pnp_register_driver(&it87_pnp_driver); +} + + +static void __exit lirc_it87_exit(void) +{ + drop_hardware(); + drop_chrdev(); + drop_port(); + pnp_unregister_driver(&it87_pnp_driver); + printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n"); +} + +/* SECTION: PNP for ITE8704/18 */ + +static const struct pnp_device_id pnp_dev_table[] = { + {"ITE8704", 0}, + {} +}; + +MODULE_DEVICE_TABLE(pnp, pnp_dev_table); + +static struct pnp_driver it87_pnp_driver = { + .name = LIRC_DRIVER_NAME, + .id_table = pnp_dev_table, + .probe = it87_probe, +}; + +module_init(lirc_it87_init); +module_exit(lirc_it87_exit); + +MODULE_DESCRIPTION("LIRC driver for ITE IT8704/05/12/18/20 CIR port"); +MODULE_AUTHOR("Hans-Gunter Lutke Uphues"); +MODULE_LICENSE("GPL"); + +module_param(io, int, S_IRUGO); +MODULE_PARM_DESC(io, "I/O base address (default: 0x310)"); + +module_param(irq, int, S_IRUGO); +#ifdef LIRC_IT87_DIGIMATRIX +MODULE_PARM_DESC(irq, "Interrupt (1,3-12) (default: 9)"); +#else +MODULE_PARM_DESC(irq, "Interrupt (1,3-12) (default: 7)"); +#endif + +module_param(it87_enable_demodulator, bool, S_IRUGO); +MODULE_PARM_DESC(it87_enable_demodulator, + "Receiver demodulator enable/disable (1/0), default: 0"); + +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Enable debugging messages"); + +module_param(digimatrix, bool, S_IRUGO | S_IWUSR); +#ifdef LIRC_IT87_DIGIMATRIX +MODULE_PARM_DESC(digimatrix, + "Asus Digimatrix it87 compat. enable/disable (1/0), default: 1"); +#else +MODULE_PARM_DESC(digimatrix, + "Asus Digimatrix it87 compat. enable/disable (1/0), default: 0"); +#endif + + +module_param(it87_freq, int, S_IRUGO); +#ifdef LIRC_IT87_DIGIMATRIX +MODULE_PARM_DESC(it87_freq, + "Carrier demodulator frequency (kHz), (default: 36)"); +#else +MODULE_PARM_DESC(it87_freq, + "Carrier demodulator frequency (kHz), (default: 38)"); +#endif diff --git a/drivers/staging/lirc/lirc_it87.h b/drivers/staging/lirc/lirc_it87.h new file mode 100644 index 0000000..cf021c8 --- /dev/null +++ b/drivers/staging/lirc/lirc_it87.h @@ -0,0 +1,116 @@ +/* lirc_it87.h */ +/* SECTION: Definitions */ + +/********************************* ITE IT87xx ************************/ + +/* based on the following documentation from ITE: + a) IT8712F Preliminary CIR Programming Guide V0.1 + b) IT8705F Simple LPC I/O Preliminary Specification V0.3 + c) IT8712F EC-LPC I/O Preliminary Specification V0.5 +*/ + +/* IT8712/05 Ports: */ +#define IT87_ADRPORT 0x2e +#define IT87_DATAPORT 0x2f +#define IT87_INIT {0x87, 0x01, 0x55, 0x55} + +/* alternate Ports: */ +/* +#define IT87_ADRPORT 0x4e +#define IT87_DATAPORT 0x4f +#define IT87_INIT {0x87, 0x01, 0x55, 0xaa} + */ + +/* IT8712/05 Registers */ +#define IT87_CFGCTRL 0x2 +#define IT87_LDN 0x7 +#define IT87_CHIP_ID1 0x20 +#define IT87_CHIP_ID2 0x21 +#define IT87_CFG_VERSION 0x22 +#define IT87_SWSUSPEND 0x23 + +#define IT8712_CIR_LDN 0xa +#define IT8705_CIR_LDN 0x7 + +/* CIR Configuration Registers: */ +#define IT87_CIR_ACT 0x30 +#define IT87_CIR_BASE_MSB 0x60 +#define IT87_CIR_BASE_LSB 0x61 +#define IT87_CIR_IRQ 0x70 +#define IT87_CIR_CONFIG 0xf0 + +/* List of IT87_CIR registers: offset to BaseAddr */ +#define IT87_CIR_DR 0 +#define IT87_CIR_IER 1 +#define IT87_CIR_RCR 2 +#define IT87_CIR_TCR1 3 +#define IT87_CIR_TCR2 4 +#define IT87_CIR_TSR 5 +#define IT87_CIR_RSR 6 +#define IT87_CIR_BDLR 5 +#define IT87_CIR_BDHR 6 +#define IT87_CIR_IIR 7 + +/* Bit Definition */ +/* IER: */ +#define IT87_CIR_IER_TM_EN 0x80 +#define IT87_CIR_IER_RESEVED 0x40 +#define IT87_CIR_IER_RESET 0x20 +#define IT87_CIR_IER_BR 0x10 +#define IT87_CIR_IER_IEC 0x8 +#define IT87_CIR_IER_RFOIE 0x4 +#define IT87_CIR_IER_RDAIE 0x2 +#define IT87_CIR_IER_TLDLIE 0x1 + +/* RCR: */ +#define IT87_CIR_RCR_RDWOS 0x80 +#define IT87_CIR_RCR_HCFS 0x40 +#define IT87_CIR_RCR_RXEN 0x20 +#define IT87_CIR_RCR_RXEND 0x10 +#define IT87_CIR_RCR_RXACT 0x8 +#define IT87_CIR_RCR_RXDCR 0x7 + +/* TCR1: */ +#define IT87_CIR_TCR1_FIFOCLR 0x80 +#define IT87_CIR_TCR1_ILE 0x40 +#define IT87_CIR_TCR1_FIFOTL 0x30 +#define IT87_CIR_TCR1_TXRLE 0x8 +#define IT87_CIR_TCR1_TXENDF 0x4 +#define IT87_CIR_TCR1_TXMPM 0x3 + +/* TCR2: */ +#define IT87_CIR_TCR2_CFQ 0xf8 +#define IT87_CIR_TCR2_TXMPW 0x7 + +/* TSR: */ +#define IT87_CIR_TSR_RESERVED 0xc0 +#define IT87_CIR_TSR_TXFBC 0x3f + +/* RSR: */ +#define IT87_CIR_RSR_RXFTO 0x80 +#define IT87_CIR_RSR_RESERVED 0x40 +#define IT87_CIR_RSR_RXFBC 0x3f + +/* IIR: */ +#define IT87_CIR_IIR_RESERVED 0xf8 +#define IT87_CIR_IIR_IID 0x6 +#define IT87_CIR_IIR_IIP 0x1 + +/* TM: */ +#define IT87_CIR_TM_IL_SEL 0x80 +#define IT87_CIR_TM_RESERVED 0x40 +#define IT87_CIR_TM_TM_REG 0x3f + +#define IT87_CIR_FIFO_SIZE 32 + +/* Baudratedivisor for IT87: power of 2: only 1,2,4 or 8) */ +#define IT87_CIR_BAUDRATE_DIVISOR 0x1 +#define IT87_CIR_DEFAULT_IOBASE 0x310 +#define IT87_CIR_DEFAULT_IRQ 0x7 +#define IT87_CIR_SPACE 0x00 +#define IT87_CIR_PULSE 0xff +#define IT87_CIR_FREQ_MIN 27 +#define IT87_CIR_FREQ_MAX 58 +#define TIME_CONST (IT87_CIR_BAUDRATE_DIVISOR * 8000000ul / 115200ul) + +/********************************* ITE IT87xx ************************/