| /* |
| * Driver for ITE Tech Inc. IT8712F/IT8512 CIR |
| * |
| * Copyright (C) 2010 Juan Jesús García de Soria <skandalfo@gmail.com> |
| * |
| * 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. |
| * |
| * Inspired by the original lirc_it87 and lirc_ite8709 drivers, on top of the |
| * skeleton provided by the nuvoton-cir driver. |
| * |
| * The lirc_it87 driver was originally written by Hans-Gunter Lutke Uphues |
| * <hg_lu@web.de> in 2001, with enhancements by Christoph Bartelmus |
| * <lirc@bartelmus.de>, Andrew Calkin <r_tay@hotmail.com> and James Edwards |
| * <jimbo-lirc@edwardsclan.net>. |
| * |
| * The lirc_ite8709 driver was written by Grégory Lardière |
| * <spmf2004-lirc@yahoo.fr> in 2008. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pnp.h> |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| #include <linux/sched.h> |
| #include <linux/delay.h> |
| #include <linux/slab.h> |
| #include <linux/input.h> |
| #include <linux/bitops.h> |
| #include <media/rc-core.h> |
| #include <linux/pci_ids.h> |
| |
| #include "ite-cir.h" |
| |
| /* module parameters */ |
| |
| /* debug level */ |
| static int debug; |
| module_param(debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Enable debugging output"); |
| |
| /* low limit for RX carrier freq, Hz, 0 for no RX demodulation */ |
| static int rx_low_carrier_freq; |
| module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, " |
| "0 for no RX demodulation"); |
| |
| /* high limit for RX carrier freq, Hz, 0 for no RX demodulation */ |
| static int rx_high_carrier_freq; |
| module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, " |
| "Hz, 0 for no RX demodulation"); |
| |
| /* override tx carrier frequency */ |
| static int tx_carrier_freq; |
| module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz"); |
| |
| /* override tx duty cycle */ |
| static int tx_duty_cycle; |
| module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100"); |
| |
| /* override default sample period */ |
| static long sample_period; |
| module_param(sample_period, long, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(sample_period, "Override carrier sample period, us"); |
| |
| /* override detected model id */ |
| static int model_number = -1; |
| module_param(model_number, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect"); |
| |
| |
| /* HW-independent code functions */ |
| |
| /* check whether carrier frequency is high frequency */ |
| static inline bool ite_is_high_carrier_freq(unsigned int freq) |
| { |
| return freq >= ITE_HCF_MIN_CARRIER_FREQ; |
| } |
| |
| /* get the bits required to program the carrier frequency in CFQ bits, |
| * unshifted */ |
| static u8 ite_get_carrier_freq_bits(unsigned int freq) |
| { |
| if (ite_is_high_carrier_freq(freq)) { |
| if (freq < 425000) |
| return ITE_CFQ_400; |
| |
| else if (freq < 465000) |
| return ITE_CFQ_450; |
| |
| else if (freq < 490000) |
| return ITE_CFQ_480; |
| |
| else |
| return ITE_CFQ_500; |
| } else { |
| /* trim to limits */ |
| if (freq < ITE_LCF_MIN_CARRIER_FREQ) |
| freq = ITE_LCF_MIN_CARRIER_FREQ; |
| if (freq > ITE_LCF_MAX_CARRIER_FREQ) |
| freq = ITE_LCF_MAX_CARRIER_FREQ; |
| |
| /* convert to kHz and subtract the base freq */ |
| freq = |
| DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ, |
| 1000); |
| |
| return (u8) freq; |
| } |
| } |
| |
| /* get the bits required to program the pulse with in TXMPW */ |
| static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle) |
| { |
| unsigned long period_ns, on_ns; |
| |
| /* sanitize freq into range */ |
| if (freq < ITE_LCF_MIN_CARRIER_FREQ) |
| freq = ITE_LCF_MIN_CARRIER_FREQ; |
| if (freq > ITE_HCF_MAX_CARRIER_FREQ) |
| freq = ITE_HCF_MAX_CARRIER_FREQ; |
| |
| period_ns = 1000000000UL / freq; |
| on_ns = period_ns * duty_cycle / 100; |
| |
| if (ite_is_high_carrier_freq(freq)) { |
| if (on_ns < 750) |
| return ITE_TXMPW_A; |
| |
| else if (on_ns < 850) |
| return ITE_TXMPW_B; |
| |
| else if (on_ns < 950) |
| return ITE_TXMPW_C; |
| |
| else if (on_ns < 1080) |
| return ITE_TXMPW_D; |
| |
| else |
| return ITE_TXMPW_E; |
| } else { |
| if (on_ns < 6500) |
| return ITE_TXMPW_A; |
| |
| else if (on_ns < 7850) |
| return ITE_TXMPW_B; |
| |
| else if (on_ns < 9650) |
| return ITE_TXMPW_C; |
| |
| else if (on_ns < 11950) |
| return ITE_TXMPW_D; |
| |
| else |
| return ITE_TXMPW_E; |
| } |
| } |
| |
| /* decode raw bytes as received by the hardware, and push them to the ir-core |
| * layer */ |
| static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int |
| length) |
| { |
| u32 sample_period; |
| unsigned long *ldata; |
| unsigned int next_one, next_zero, size; |
| DEFINE_IR_RAW_EVENT(ev); |
| |
| if (length == 0) |
| return; |
| |
| sample_period = dev->params.sample_period; |
| ldata = (unsigned long *)data; |
| size = length << 3; |
| next_one = find_next_bit_le(ldata, size, 0); |
| if (next_one > 0) { |
| ev.pulse = true; |
| ev.duration = |
| ITE_BITS_TO_NS(next_one, sample_period); |
| ir_raw_event_store_with_filter(dev->rdev, &ev); |
| } |
| |
| while (next_one < size) { |
| next_zero = find_next_zero_bit_le(ldata, size, next_one + 1); |
| ev.pulse = false; |
| ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period); |
| ir_raw_event_store_with_filter(dev->rdev, &ev); |
| |
| if (next_zero < size) { |
| next_one = |
| find_next_bit_le(ldata, |
| size, |
| next_zero + 1); |
| ev.pulse = true; |
| ev.duration = |
| ITE_BITS_TO_NS(next_one - next_zero, |
| sample_period); |
| ir_raw_event_store_with_filter |
| (dev->rdev, &ev); |
| } else |
| next_one = size; |
| } |
| |
| ir_raw_event_handle(dev->rdev); |
| |
| ite_dbg_verbose("decoded %d bytes.", length); |
| } |
| |
| /* set all the rx/tx carrier parameters; this must be called with the device |
| * spinlock held */ |
| static void ite_set_carrier_params(struct ite_dev *dev) |
| { |
| unsigned int freq, low_freq, high_freq; |
| int allowance; |
| bool use_demodulator; |
| bool for_tx = dev->transmitting; |
| |
| ite_dbg("%s called", __func__); |
| |
| if (for_tx) { |
| /* we don't need no stinking calculations */ |
| freq = dev->params.tx_carrier_freq; |
| allowance = ITE_RXDCR_DEFAULT; |
| use_demodulator = false; |
| } else { |
| low_freq = dev->params.rx_low_carrier_freq; |
| high_freq = dev->params.rx_high_carrier_freq; |
| |
| if (low_freq == 0) { |
| /* don't demodulate */ |
| freq = |
| ITE_DEFAULT_CARRIER_FREQ; |
| allowance = ITE_RXDCR_DEFAULT; |
| use_demodulator = false; |
| } else { |
| /* calculate the middle freq */ |
| freq = (low_freq + high_freq) / 2; |
| |
| /* calculate the allowance */ |
| allowance = |
| DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq), |
| ITE_RXDCR_PER_10000_STEP |
| * (high_freq + low_freq)); |
| |
| if (allowance < 1) |
| allowance = 1; |
| |
| if (allowance > ITE_RXDCR_MAX) |
| allowance = ITE_RXDCR_MAX; |
| } |
| } |
| |
| /* set the carrier parameters in a device-dependent way */ |
| dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq), |
| use_demodulator, ite_get_carrier_freq_bits(freq), allowance, |
| ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle)); |
| } |
| |
| /* interrupt service routine for incoming and outgoing CIR data */ |
| static irqreturn_t ite_cir_isr(int irq, void *data) |
| { |
| struct ite_dev *dev = data; |
| unsigned long flags; |
| irqreturn_t ret = IRQ_RETVAL(IRQ_NONE); |
| u8 rx_buf[ITE_RX_FIFO_LEN]; |
| int rx_bytes; |
| int iflags; |
| |
| ite_dbg_verbose("%s firing", __func__); |
| |
| /* grab the spinlock */ |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* read the interrupt flags */ |
| iflags = dev->params.get_irq_causes(dev); |
| |
| /* check for the receive interrupt */ |
| if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) { |
| /* read the FIFO bytes */ |
| rx_bytes = |
| dev->params.get_rx_bytes(dev, rx_buf, |
| ITE_RX_FIFO_LEN); |
| |
| if (rx_bytes > 0) { |
| /* drop the spinlock, since the ir-core layer |
| * may call us back again through |
| * ite_s_idle() */ |
| spin_unlock_irqrestore(&dev-> |
| lock, |
| flags); |
| |
| /* decode the data we've just received */ |
| ite_decode_bytes(dev, rx_buf, |
| rx_bytes); |
| |
| /* reacquire the spinlock */ |
| spin_lock_irqsave(&dev->lock, |
| flags); |
| |
| /* mark the interrupt as serviced */ |
| ret = IRQ_RETVAL(IRQ_HANDLED); |
| } |
| } else if (iflags & ITE_IRQ_TX_FIFO) { |
| /* FIFO space available interrupt */ |
| ite_dbg_verbose("got interrupt for TX FIFO"); |
| |
| /* wake any sleeping transmitter */ |
| wake_up_interruptible(&dev->tx_queue); |
| |
| /* mark the interrupt as serviced */ |
| ret = IRQ_RETVAL(IRQ_HANDLED); |
| } |
| |
| /* drop the spinlock */ |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| ite_dbg_verbose("%s done returning %d", __func__, (int)ret); |
| |
| return ret; |
| } |
| |
| /* set the rx carrier freq range, guess it's in Hz... */ |
| static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32 |
| carrier_high) |
| { |
| unsigned long flags; |
| struct ite_dev *dev = rcdev->priv; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->params.rx_low_carrier_freq = carrier_low; |
| dev->params.rx_high_carrier_freq = carrier_high; |
| ite_set_carrier_params(dev); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| /* set the tx carrier freq, guess it's in Hz... */ |
| static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier) |
| { |
| unsigned long flags; |
| struct ite_dev *dev = rcdev->priv; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->params.tx_carrier_freq = carrier; |
| ite_set_carrier_params(dev); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| /* set the tx duty cycle by controlling the pulse width */ |
| static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle) |
| { |
| unsigned long flags; |
| struct ite_dev *dev = rcdev->priv; |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->params.tx_duty_cycle = duty_cycle; |
| ite_set_carrier_params(dev); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| /* transmit out IR pulses; what you get here is a batch of alternating |
| * pulse/space/pulse/space lengths that we should write out completely through |
| * the FIFO, blocking on a full FIFO */ |
| static int ite_tx_ir(struct rc_dev *rcdev, unsigned *txbuf, unsigned n) |
| { |
| unsigned long flags; |
| struct ite_dev *dev = rcdev->priv; |
| bool is_pulse = false; |
| int remaining_us, fifo_avail, fifo_remaining, last_idx = 0; |
| int max_rle_us, next_rle_us; |
| int ret = n; |
| u8 last_sent[ITE_TX_FIFO_LEN]; |
| u8 val; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* clear the array just in case */ |
| memset(last_sent, 0, ARRAY_SIZE(last_sent)); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* let everybody know we're now transmitting */ |
| dev->transmitting = true; |
| |
| /* and set the carrier values for transmission */ |
| ite_set_carrier_params(dev); |
| |
| /* calculate how much time we can send in one byte */ |
| max_rle_us = |
| (ITE_BAUDRATE_DIVISOR * dev->params.sample_period * |
| ITE_TX_MAX_RLE) / 1000; |
| |
| /* disable the receiver */ |
| dev->params.disable_rx(dev); |
| |
| /* this is where we'll begin filling in the FIFO, until it's full. |
| * then we'll just activate the interrupt, wait for it to wake us up |
| * again, disable it, continue filling the FIFO... until everything |
| * has been pushed out */ |
| fifo_avail = |
| ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev); |
| |
| while (n > 0 && dev->in_use) { |
| /* transmit the next sample */ |
| is_pulse = !is_pulse; |
| remaining_us = *(txbuf++); |
| n--; |
| |
| ite_dbg("%s: %ld", |
| ((is_pulse) ? "pulse" : "space"), |
| (long int) |
| remaining_us); |
| |
| /* repeat while the pulse is non-zero length */ |
| while (remaining_us > 0 && dev->in_use) { |
| if (remaining_us > max_rle_us) |
| next_rle_us = max_rle_us; |
| |
| else |
| next_rle_us = remaining_us; |
| |
| remaining_us -= next_rle_us; |
| |
| /* check what's the length we have to pump out */ |
| val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us; |
| |
| /* put it into the sent buffer */ |
| last_sent[last_idx++] = val; |
| last_idx &= (ITE_TX_FIFO_LEN); |
| |
| /* encode it for 7 bits */ |
| val = (val - 1) & ITE_TX_RLE_MASK; |
| |
| /* take into account pulse/space prefix */ |
| if (is_pulse) |
| val |= ITE_TX_PULSE; |
| |
| else |
| val |= ITE_TX_SPACE; |
| |
| /* |
| * if we get to 0 available, read again, just in case |
| * some other slot got freed |
| */ |
| if (fifo_avail <= 0) |
| fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev); |
| |
| /* if it's still full */ |
| if (fifo_avail <= 0) { |
| /* enable the tx interrupt */ |
| dev->params. |
| enable_tx_interrupt(dev); |
| |
| /* drop the spinlock */ |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| /* wait for the FIFO to empty enough */ |
| wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8); |
| |
| /* get the spinlock again */ |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* disable the tx interrupt again. */ |
| dev->params. |
| disable_tx_interrupt(dev); |
| } |
| |
| /* now send the byte through the FIFO */ |
| dev->params.put_tx_byte(dev, val); |
| fifo_avail--; |
| } |
| } |
| |
| /* wait and don't return until the whole FIFO has been sent out; |
| * otherwise we could configure the RX carrier params instead of the |
| * TX ones while the transmission is still being performed! */ |
| fifo_remaining = dev->params.get_tx_used_slots(dev); |
| remaining_us = 0; |
| while (fifo_remaining > 0) { |
| fifo_remaining--; |
| last_idx--; |
| last_idx &= (ITE_TX_FIFO_LEN - 1); |
| remaining_us += last_sent[last_idx]; |
| } |
| remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE); |
| |
| /* drop the spinlock while we sleep */ |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| /* sleep remaining_us microseconds */ |
| mdelay(DIV_ROUND_UP(remaining_us, 1000)); |
| |
| /* reacquire the spinlock */ |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* now we're not transmitting anymore */ |
| dev->transmitting = false; |
| |
| /* and set the carrier values for reception */ |
| ite_set_carrier_params(dev); |
| |
| /* reenable the receiver */ |
| if (dev->in_use) |
| dev->params.enable_rx(dev); |
| |
| /* notify transmission end */ |
| wake_up_interruptible(&dev->tx_ended); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return ret; |
| } |
| |
| /* idle the receiver if needed */ |
| static void ite_s_idle(struct rc_dev *rcdev, bool enable) |
| { |
| unsigned long flags; |
| struct ite_dev *dev = rcdev->priv; |
| |
| ite_dbg("%s called", __func__); |
| |
| if (enable) { |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->params.idle_rx(dev); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| } |
| } |
| |
| |
| /* IT8712F HW-specific functions */ |
| |
| /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| * */ |
| static int it87_get_irq_causes(struct ite_dev *dev) |
| { |
| u8 iflags; |
| int ret = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read the interrupt flags */ |
| iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II; |
| |
| switch (iflags) { |
| case IT87_II_RXDS: |
| ret = ITE_IRQ_RX_FIFO; |
| break; |
| case IT87_II_RXFO: |
| ret = ITE_IRQ_RX_FIFO_OVERRUN; |
| break; |
| case IT87_II_TXLDL: |
| ret = ITE_IRQ_TX_FIFO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| /* set the carrier parameters; to be called with the spinlock held */ |
| static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| bool use_demodulator, |
| u8 carrier_freq_bits, u8 allowance_bits, |
| u8 pulse_width_bits) |
| { |
| u8 val; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* program the RCR register */ |
| val = inb(dev->cir_addr + IT87_RCR) |
| & ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR); |
| |
| if (high_freq) |
| val |= IT87_HCFS; |
| |
| if (use_demodulator) |
| val |= IT87_RXEND; |
| |
| val |= allowance_bits; |
| |
| outb(val, dev->cir_addr + IT87_RCR); |
| |
| /* program the TCR2 register */ |
| outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits, |
| dev->cir_addr + IT87_TCR2); |
| } |
| |
| /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| * held */ |
| static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| { |
| int fifo, read = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read how many bytes are still in the FIFO */ |
| fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC; |
| |
| while (fifo > 0 && buf_size > 0) { |
| *(buf++) = inb(dev->cir_addr + IT87_DR); |
| fifo--; |
| read++; |
| buf_size--; |
| } |
| |
| return read; |
| } |
| |
| /* return how many bytes are still in the FIFO; this will be called |
| * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| * empty; let's expect this won't be a problem */ |
| static int it87_get_tx_used_slots(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC; |
| } |
| |
| /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| static void it87_put_tx_byte(struct ite_dev *dev, u8 value) |
| { |
| outb(value, dev->cir_addr + IT87_DR); |
| } |
| |
| /* idle the receiver so that we won't receive samples until another |
| pulse is detected; this must be called with the device spinlock held */ |
| static void it87_idle_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable streaming by clearing RXACT writing it as 1 */ |
| outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT, |
| dev->cir_addr + IT87_RCR); |
| |
| /* clear the FIFO */ |
| outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR, |
| dev->cir_addr + IT87_TCR1); |
| } |
| |
| /* disable the receiver; this must be called with the device spinlock held */ |
| static void it87_disable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the receiver interrupts */ |
| outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE), |
| dev->cir_addr + IT87_IER); |
| |
| /* disable the receiver */ |
| outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN, |
| dev->cir_addr + IT87_RCR); |
| |
| /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| * in the previous outb() call) */ |
| it87_idle_rx(dev); |
| } |
| |
| /* enable the receiver; this must be called with the device spinlock held */ |
| static void it87_enable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the receiver by setting RXEN */ |
| outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN, |
| dev->cir_addr + IT87_RCR); |
| |
| /* just prepare it to idle for the next reception */ |
| it87_idle_rx(dev); |
| |
| /* enable the receiver interrupts and master enable flag */ |
| outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC, |
| dev->cir_addr + IT87_IER); |
| } |
| |
| /* disable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it87_disable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the transmitter interrupts */ |
| outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE, |
| dev->cir_addr + IT87_IER); |
| } |
| |
| /* enable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it87_enable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the transmitter interrupts and master enable flag */ |
| outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC, |
| dev->cir_addr + IT87_IER); |
| } |
| |
| /* disable the device; this must be called with the device spinlock held */ |
| static void it87_disable(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* clear out all interrupt enable flags */ |
| outb(inb(dev->cir_addr + IT87_IER) & |
| ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE), |
| dev->cir_addr + IT87_IER); |
| |
| /* disable the receiver */ |
| it87_disable_rx(dev); |
| |
| /* erase the FIFO */ |
| outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1), |
| dev->cir_addr + IT87_TCR1); |
| } |
| |
| /* initialize the hardware */ |
| static void it87_init_hardware(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable just the baud rate divisor register, |
| disabling all the interrupts at the same time */ |
| outb((inb(dev->cir_addr + IT87_IER) & |
| ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR, |
| dev->cir_addr + IT87_IER); |
| |
| /* write out the baud rate divisor */ |
| outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR); |
| outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR); |
| |
| /* disable the baud rate divisor register again */ |
| outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR, |
| dev->cir_addr + IT87_IER); |
| |
| /* program the RCR register defaults */ |
| outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR); |
| |
| /* program the TCR1 register */ |
| outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE |
| | IT87_FIFOTL_DEFAULT | IT87_FIFOCLR, |
| dev->cir_addr + IT87_TCR1); |
| |
| /* program the carrier parameters */ |
| ite_set_carrier_params(dev); |
| } |
| |
| /* IT8512F on ITE8708 HW-specific functions */ |
| |
| /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| * */ |
| static int it8708_get_irq_causes(struct ite_dev *dev) |
| { |
| u8 iflags; |
| int ret = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read the interrupt flags */ |
| iflags = inb(dev->cir_addr + IT8708_C0IIR); |
| |
| if (iflags & IT85_TLDLI) |
| ret |= ITE_IRQ_TX_FIFO; |
| if (iflags & IT85_RDAI) |
| ret |= ITE_IRQ_RX_FIFO; |
| if (iflags & IT85_RFOI) |
| ret |= ITE_IRQ_RX_FIFO_OVERRUN; |
| |
| return ret; |
| } |
| |
| /* set the carrier parameters; to be called with the spinlock held */ |
| static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| bool use_demodulator, |
| u8 carrier_freq_bits, u8 allowance_bits, |
| u8 pulse_width_bits) |
| { |
| u8 val; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* program the C0CFR register, with HRAE=1 */ |
| outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE, |
| dev->cir_addr + IT8708_BANKSEL); |
| |
| val = (inb(dev->cir_addr + IT8708_C0CFR) |
| & ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits; |
| |
| if (high_freq) |
| val |= IT85_HCFS; |
| |
| outb(val, dev->cir_addr + IT8708_C0CFR); |
| |
| outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE, |
| dev->cir_addr + IT8708_BANKSEL); |
| |
| /* program the C0RCR register */ |
| val = inb(dev->cir_addr + IT8708_C0RCR) |
| & ~(IT85_RXEND | IT85_RXDCR); |
| |
| if (use_demodulator) |
| val |= IT85_RXEND; |
| |
| val |= allowance_bits; |
| |
| outb(val, dev->cir_addr + IT8708_C0RCR); |
| |
| /* program the C0TCR register */ |
| val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW; |
| val |= pulse_width_bits; |
| outb(val, dev->cir_addr + IT8708_C0TCR); |
| } |
| |
| /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| * held */ |
| static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| { |
| int fifo, read = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read how many bytes are still in the FIFO */ |
| fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC; |
| |
| while (fifo > 0 && buf_size > 0) { |
| *(buf++) = inb(dev->cir_addr + IT8708_C0DR); |
| fifo--; |
| read++; |
| buf_size--; |
| } |
| |
| return read; |
| } |
| |
| /* return how many bytes are still in the FIFO; this will be called |
| * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| * empty; let's expect this won't be a problem */ |
| static int it8708_get_tx_used_slots(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC; |
| } |
| |
| /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| static void it8708_put_tx_byte(struct ite_dev *dev, u8 value) |
| { |
| outb(value, dev->cir_addr + IT8708_C0DR); |
| } |
| |
| /* idle the receiver so that we won't receive samples until another |
| pulse is detected; this must be called with the device spinlock held */ |
| static void it8708_idle_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable streaming by clearing RXACT writing it as 1 */ |
| outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT, |
| dev->cir_addr + IT8708_C0RCR); |
| |
| /* clear the FIFO */ |
| outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR, |
| dev->cir_addr + IT8708_C0MSTCR); |
| } |
| |
| /* disable the receiver; this must be called with the device spinlock held */ |
| static void it8708_disable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the receiver interrupts */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) & |
| ~(IT85_RDAIE | IT85_RFOIE), |
| dev->cir_addr + IT8708_C0IER); |
| |
| /* disable the receiver */ |
| outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN, |
| dev->cir_addr + IT8708_C0RCR); |
| |
| /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| * in the previous outb() call) */ |
| it8708_idle_rx(dev); |
| } |
| |
| /* enable the receiver; this must be called with the device spinlock held */ |
| static void it8708_enable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the receiver by setting RXEN */ |
| outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN, |
| dev->cir_addr + IT8708_C0RCR); |
| |
| /* just prepare it to idle for the next reception */ |
| it8708_idle_rx(dev); |
| |
| /* enable the receiver interrupts and master enable flag */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) |
| |IT85_RDAIE | IT85_RFOIE | IT85_IEC, |
| dev->cir_addr + IT8708_C0IER); |
| } |
| |
| /* disable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it8708_disable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the transmitter interrupts */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE, |
| dev->cir_addr + IT8708_C0IER); |
| } |
| |
| /* enable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it8708_enable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the transmitter interrupts and master enable flag */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) |
| |IT85_TLDLIE | IT85_IEC, |
| dev->cir_addr + IT8708_C0IER); |
| } |
| |
| /* disable the device; this must be called with the device spinlock held */ |
| static void it8708_disable(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* clear out all interrupt enable flags */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) & |
| ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| dev->cir_addr + IT8708_C0IER); |
| |
| /* disable the receiver */ |
| it8708_disable_rx(dev); |
| |
| /* erase the FIFO */ |
| outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR), |
| dev->cir_addr + IT8708_C0MSTCR); |
| } |
| |
| /* initialize the hardware */ |
| static void it8708_init_hardware(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable all the interrupts */ |
| outb(inb(dev->cir_addr + IT8708_C0IER) & |
| ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| dev->cir_addr + IT8708_C0IER); |
| |
| /* program the baud rate divisor */ |
| outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE, |
| dev->cir_addr + IT8708_BANKSEL); |
| |
| outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR); |
| outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, |
| dev->cir_addr + IT8708_C0BDHR); |
| |
| outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE, |
| dev->cir_addr + IT8708_BANKSEL); |
| |
| /* program the C0MSTCR register defaults */ |
| outb((inb(dev->cir_addr + IT8708_C0MSTCR) & |
| ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL | |
| IT85_FIFOCLR | IT85_RESET)) | |
| IT85_FIFOTL_DEFAULT, |
| dev->cir_addr + IT8708_C0MSTCR); |
| |
| /* program the C0RCR register defaults */ |
| outb((inb(dev->cir_addr + IT8708_C0RCR) & |
| ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | |
| IT85_RXACT | IT85_RXDCR)) | |
| ITE_RXDCR_DEFAULT, |
| dev->cir_addr + IT8708_C0RCR); |
| |
| /* program the C0TCR register defaults */ |
| outb((inb(dev->cir_addr + IT8708_C0TCR) & |
| ~(IT85_TXMPM | IT85_TXMPW)) |
| |IT85_TXRLE | IT85_TXENDF | |
| IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT, |
| dev->cir_addr + IT8708_C0TCR); |
| |
| /* program the carrier parameters */ |
| ite_set_carrier_params(dev); |
| } |
| |
| /* IT8512F on ITE8709 HW-specific functions */ |
| |
| /* read a byte from the SRAM module */ |
| static inline u8 it8709_rm(struct ite_dev *dev, int index) |
| { |
| outb(index, dev->cir_addr + IT8709_RAM_IDX); |
| return inb(dev->cir_addr + IT8709_RAM_VAL); |
| } |
| |
| /* write a byte to the SRAM module */ |
| static inline void it8709_wm(struct ite_dev *dev, u8 val, int index) |
| { |
| outb(index, dev->cir_addr + IT8709_RAM_IDX); |
| outb(val, dev->cir_addr + IT8709_RAM_VAL); |
| } |
| |
| static void it8709_wait(struct ite_dev *dev) |
| { |
| int i = 0; |
| /* |
| * loop until device tells it's ready to continue |
| * iterations count is usually ~750 but can sometimes achieve 13000 |
| */ |
| for (i = 0; i < 15000; i++) { |
| udelay(2); |
| if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE) |
| break; |
| } |
| } |
| |
| /* read the value of a CIR register */ |
| static u8 it8709_rr(struct ite_dev *dev, int index) |
| { |
| /* just wait in case the previous access was a write */ |
| it8709_wait(dev); |
| it8709_wm(dev, index, IT8709_REG_IDX); |
| it8709_wm(dev, IT8709_READ, IT8709_MODE); |
| |
| /* wait for the read data to be available */ |
| it8709_wait(dev); |
| |
| /* return the read value */ |
| return it8709_rm(dev, IT8709_REG_VAL); |
| } |
| |
| /* write the value of a CIR register */ |
| static void it8709_wr(struct ite_dev *dev, u8 val, int index) |
| { |
| /* we wait before writing, and not afterwards, since this allows us to |
| * pipeline the host CPU with the microcontroller */ |
| it8709_wait(dev); |
| it8709_wm(dev, val, IT8709_REG_VAL); |
| it8709_wm(dev, index, IT8709_REG_IDX); |
| it8709_wm(dev, IT8709_WRITE, IT8709_MODE); |
| } |
| |
| /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| * */ |
| static int it8709_get_irq_causes(struct ite_dev *dev) |
| { |
| u8 iflags; |
| int ret = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read the interrupt flags */ |
| iflags = it8709_rm(dev, IT8709_IIR); |
| |
| if (iflags & IT85_TLDLI) |
| ret |= ITE_IRQ_TX_FIFO; |
| if (iflags & IT85_RDAI) |
| ret |= ITE_IRQ_RX_FIFO; |
| if (iflags & IT85_RFOI) |
| ret |= ITE_IRQ_RX_FIFO_OVERRUN; |
| |
| return ret; |
| } |
| |
| /* set the carrier parameters; to be called with the spinlock held */ |
| static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| bool use_demodulator, |
| u8 carrier_freq_bits, u8 allowance_bits, |
| u8 pulse_width_bits) |
| { |
| u8 val; |
| |
| ite_dbg("%s called", __func__); |
| |
| val = (it8709_rr(dev, IT85_C0CFR) |
| &~(IT85_HCFS | IT85_CFQ)) | |
| carrier_freq_bits; |
| |
| if (high_freq) |
| val |= IT85_HCFS; |
| |
| it8709_wr(dev, val, IT85_C0CFR); |
| |
| /* program the C0RCR register */ |
| val = it8709_rr(dev, IT85_C0RCR) |
| & ~(IT85_RXEND | IT85_RXDCR); |
| |
| if (use_demodulator) |
| val |= IT85_RXEND; |
| |
| val |= allowance_bits; |
| |
| it8709_wr(dev, val, IT85_C0RCR); |
| |
| /* program the C0TCR register */ |
| val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW; |
| val |= pulse_width_bits; |
| it8709_wr(dev, val, IT85_C0TCR); |
| } |
| |
| /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| * held */ |
| static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| { |
| int fifo, read = 0; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* read how many bytes are still in the FIFO */ |
| fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC; |
| |
| while (fifo > 0 && buf_size > 0) { |
| *(buf++) = it8709_rm(dev, IT8709_FIFO + read); |
| fifo--; |
| read++; |
| buf_size--; |
| } |
| |
| /* 'clear' the FIFO by setting the writing index to 0; this is |
| * completely bound to be racy, but we can't help it, since it's a |
| * limitation of the protocol */ |
| it8709_wm(dev, 0, IT8709_RFSR); |
| |
| return read; |
| } |
| |
| /* return how many bytes are still in the FIFO; this will be called |
| * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| * empty; let's expect this won't be a problem */ |
| static int it8709_get_tx_used_slots(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC; |
| } |
| |
| /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| static void it8709_put_tx_byte(struct ite_dev *dev, u8 value) |
| { |
| it8709_wr(dev, value, IT85_C0DR); |
| } |
| |
| /* idle the receiver so that we won't receive samples until another |
| pulse is detected; this must be called with the device spinlock held */ |
| static void it8709_idle_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable streaming by clearing RXACT writing it as 1 */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT, |
| IT85_C0RCR); |
| |
| /* clear the FIFO */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR, |
| IT85_C0MSTCR); |
| } |
| |
| /* disable the receiver; this must be called with the device spinlock held */ |
| static void it8709_disable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the receiver interrupts */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| ~(IT85_RDAIE | IT85_RFOIE), |
| IT85_C0IER); |
| |
| /* disable the receiver */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN, |
| IT85_C0RCR); |
| |
| /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| * in the previous it8709_wr(dev, ) call) */ |
| it8709_idle_rx(dev); |
| } |
| |
| /* enable the receiver; this must be called with the device spinlock held */ |
| static void it8709_enable_rx(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the receiver by setting RXEN */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN, |
| IT85_C0RCR); |
| |
| /* just prepare it to idle for the next reception */ |
| it8709_idle_rx(dev); |
| |
| /* enable the receiver interrupts and master enable flag */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) |
| |IT85_RDAIE | IT85_RFOIE | IT85_IEC, |
| IT85_C0IER); |
| } |
| |
| /* disable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it8709_disable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable the transmitter interrupts */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE, |
| IT85_C0IER); |
| } |
| |
| /* enable the transmitter interrupt; this must be called with the device |
| * spinlock held */ |
| static void it8709_enable_tx_interrupt(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* enable the transmitter interrupts and master enable flag */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) |
| |IT85_TLDLIE | IT85_IEC, |
| IT85_C0IER); |
| } |
| |
| /* disable the device; this must be called with the device spinlock held */ |
| static void it8709_disable(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* clear out all interrupt enable flags */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| IT85_C0IER); |
| |
| /* disable the receiver */ |
| it8709_disable_rx(dev); |
| |
| /* erase the FIFO */ |
| it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR), |
| IT85_C0MSTCR); |
| } |
| |
| /* initialize the hardware */ |
| static void it8709_init_hardware(struct ite_dev *dev) |
| { |
| ite_dbg("%s called", __func__); |
| |
| /* disable all the interrupts */ |
| it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| IT85_C0IER); |
| |
| /* program the baud rate divisor */ |
| it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR); |
| it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff, |
| IT85_C0BDHR); |
| |
| /* program the C0MSTCR register defaults */ |
| it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) & |
| ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
| | IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT, |
| IT85_C0MSTCR); |
| |
| /* program the C0RCR register defaults */ |
| it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) & |
| ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT |
| | IT85_RXDCR)) | ITE_RXDCR_DEFAULT, |
| IT85_C0RCR); |
| |
| /* program the C0TCR register defaults */ |
| it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW)) |
| | IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT |
| | IT85_TXMPW_DEFAULT, |
| IT85_C0TCR); |
| |
| /* program the carrier parameters */ |
| ite_set_carrier_params(dev); |
| } |
| |
| |
| /* generic hardware setup/teardown code */ |
| |
| /* activate the device for use */ |
| static int ite_open(struct rc_dev *rcdev) |
| { |
| struct ite_dev *dev = rcdev->priv; |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->in_use = true; |
| |
| /* enable the receiver */ |
| dev->params.enable_rx(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| /* deactivate the device for use */ |
| static void ite_close(struct rc_dev *rcdev) |
| { |
| struct ite_dev *dev = rcdev->priv; |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| dev->in_use = false; |
| |
| /* wait for any transmission to end */ |
| spin_unlock_irqrestore(&dev->lock, flags); |
| wait_event_interruptible(dev->tx_ended, !dev->transmitting); |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| dev->params.disable(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| } |
| |
| /* supported models and their parameters */ |
| static const struct ite_dev_params ite_dev_descs[] = { |
| { /* 0: ITE8704 */ |
| .model = "ITE8704 CIR transceiver", |
| .io_region_size = IT87_IOREG_LENGTH, |
| .io_rsrc_no = 0, |
| .hw_tx_capable = true, |
| .sample_period = (u32) (1000000000ULL / 115200), |
| .tx_carrier_freq = 38000, |
| .tx_duty_cycle = 33, |
| .rx_low_carrier_freq = 0, |
| .rx_high_carrier_freq = 0, |
| |
| /* operations */ |
| .get_irq_causes = it87_get_irq_causes, |
| .enable_rx = it87_enable_rx, |
| .idle_rx = it87_idle_rx, |
| .disable_rx = it87_idle_rx, |
| .get_rx_bytes = it87_get_rx_bytes, |
| .enable_tx_interrupt = it87_enable_tx_interrupt, |
| .disable_tx_interrupt = it87_disable_tx_interrupt, |
| .get_tx_used_slots = it87_get_tx_used_slots, |
| .put_tx_byte = it87_put_tx_byte, |
| .disable = it87_disable, |
| .init_hardware = it87_init_hardware, |
| .set_carrier_params = it87_set_carrier_params, |
| }, |
| { /* 1: ITE8713 */ |
| .model = "ITE8713 CIR transceiver", |
| .io_region_size = IT87_IOREG_LENGTH, |
| .io_rsrc_no = 0, |
| .hw_tx_capable = true, |
| .sample_period = (u32) (1000000000ULL / 115200), |
| .tx_carrier_freq = 38000, |
| .tx_duty_cycle = 33, |
| .rx_low_carrier_freq = 0, |
| .rx_high_carrier_freq = 0, |
| |
| /* operations */ |
| .get_irq_causes = it87_get_irq_causes, |
| .enable_rx = it87_enable_rx, |
| .idle_rx = it87_idle_rx, |
| .disable_rx = it87_idle_rx, |
| .get_rx_bytes = it87_get_rx_bytes, |
| .enable_tx_interrupt = it87_enable_tx_interrupt, |
| .disable_tx_interrupt = it87_disable_tx_interrupt, |
| .get_tx_used_slots = it87_get_tx_used_slots, |
| .put_tx_byte = it87_put_tx_byte, |
| .disable = it87_disable, |
| .init_hardware = it87_init_hardware, |
| .set_carrier_params = it87_set_carrier_params, |
| }, |
| { /* 2: ITE8708 */ |
| .model = "ITE8708 CIR transceiver", |
| .io_region_size = IT8708_IOREG_LENGTH, |
| .io_rsrc_no = 0, |
| .hw_tx_capable = true, |
| .sample_period = (u32) (1000000000ULL / 115200), |
| .tx_carrier_freq = 38000, |
| .tx_duty_cycle = 33, |
| .rx_low_carrier_freq = 0, |
| .rx_high_carrier_freq = 0, |
| |
| /* operations */ |
| .get_irq_causes = it8708_get_irq_causes, |
| .enable_rx = it8708_enable_rx, |
| .idle_rx = it8708_idle_rx, |
| .disable_rx = it8708_idle_rx, |
| .get_rx_bytes = it8708_get_rx_bytes, |
| .enable_tx_interrupt = it8708_enable_tx_interrupt, |
| .disable_tx_interrupt = |
| it8708_disable_tx_interrupt, |
| .get_tx_used_slots = it8708_get_tx_used_slots, |
| .put_tx_byte = it8708_put_tx_byte, |
| .disable = it8708_disable, |
| .init_hardware = it8708_init_hardware, |
| .set_carrier_params = it8708_set_carrier_params, |
| }, |
| { /* 3: ITE8709 */ |
| .model = "ITE8709 CIR transceiver", |
| .io_region_size = IT8709_IOREG_LENGTH, |
| .io_rsrc_no = 2, |
| .hw_tx_capable = true, |
| .sample_period = (u32) (1000000000ULL / 115200), |
| .tx_carrier_freq = 38000, |
| .tx_duty_cycle = 33, |
| .rx_low_carrier_freq = 0, |
| .rx_high_carrier_freq = 0, |
| |
| /* operations */ |
| .get_irq_causes = it8709_get_irq_causes, |
| .enable_rx = it8709_enable_rx, |
| .idle_rx = it8709_idle_rx, |
| .disable_rx = it8709_idle_rx, |
| .get_rx_bytes = it8709_get_rx_bytes, |
| .enable_tx_interrupt = it8709_enable_tx_interrupt, |
| .disable_tx_interrupt = |
| it8709_disable_tx_interrupt, |
| .get_tx_used_slots = it8709_get_tx_used_slots, |
| .put_tx_byte = it8709_put_tx_byte, |
| .disable = it8709_disable, |
| .init_hardware = it8709_init_hardware, |
| .set_carrier_params = it8709_set_carrier_params, |
| }, |
| }; |
| |
| static const struct pnp_device_id ite_ids[] = { |
| {"ITE8704", 0}, /* Default model */ |
| {"ITE8713", 1}, /* CIR found in EEEBox 1501U */ |
| {"ITE8708", 2}, /* Bridged IT8512 */ |
| {"ITE8709", 3}, /* SRAM-Bridged IT8512 */ |
| {"", 0}, |
| }; |
| |
| /* allocate memory, probe hardware, and initialize everything */ |
| static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id |
| *dev_id) |
| { |
| const struct ite_dev_params *dev_desc = NULL; |
| struct ite_dev *itdev = NULL; |
| struct rc_dev *rdev = NULL; |
| int ret = -ENOMEM; |
| int model_no; |
| int io_rsrc_no; |
| |
| ite_dbg("%s called", __func__); |
| |
| itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL); |
| if (!itdev) |
| return ret; |
| |
| /* input device for IR remote (and tx) */ |
| rdev = rc_allocate_device(); |
| if (!rdev) |
| goto exit_free_dev_rdev; |
| itdev->rdev = rdev; |
| |
| ret = -ENODEV; |
| |
| /* get the model number */ |
| model_no = (int)dev_id->driver_data; |
| ite_pr(KERN_NOTICE, "Auto-detected model: %s\n", |
| ite_dev_descs[model_no].model); |
| |
| if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) { |
| model_no = model_number; |
| ite_pr(KERN_NOTICE, "The model has been fixed by a module " |
| "parameter."); |
| } |
| |
| ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model); |
| |
| /* get the description for the device */ |
| dev_desc = &ite_dev_descs[model_no]; |
| io_rsrc_no = dev_desc->io_rsrc_no; |
| |
| /* validate pnp resources */ |
| if (!pnp_port_valid(pdev, io_rsrc_no) || |
| pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) { |
| dev_err(&pdev->dev, "IR PNP Port not valid!\n"); |
| goto exit_free_dev_rdev; |
| } |
| |
| if (!pnp_irq_valid(pdev, 0)) { |
| dev_err(&pdev->dev, "PNP IRQ not valid!\n"); |
| goto exit_free_dev_rdev; |
| } |
| |
| /* store resource values */ |
| itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no); |
| itdev->cir_irq = pnp_irq(pdev, 0); |
| |
| /* initialize spinlocks */ |
| spin_lock_init(&itdev->lock); |
| |
| /* initialize raw event */ |
| init_ir_raw_event(&itdev->rawir); |
| |
| /* set driver data into the pnp device */ |
| pnp_set_drvdata(pdev, itdev); |
| itdev->pdev = pdev; |
| |
| /* initialize waitqueues for transmission */ |
| init_waitqueue_head(&itdev->tx_queue); |
| init_waitqueue_head(&itdev->tx_ended); |
| |
| /* copy model-specific parameters */ |
| itdev->params = *dev_desc; |
| |
| /* apply any overrides */ |
| if (sample_period > 0) |
| itdev->params.sample_period = sample_period; |
| |
| if (tx_carrier_freq > 0) |
| itdev->params.tx_carrier_freq = tx_carrier_freq; |
| |
| if (tx_duty_cycle > 0 && tx_duty_cycle <= 100) |
| itdev->params.tx_duty_cycle = tx_duty_cycle; |
| |
| if (rx_low_carrier_freq > 0) |
| itdev->params.rx_low_carrier_freq = rx_low_carrier_freq; |
| |
| if (rx_high_carrier_freq > 0) |
| itdev->params.rx_high_carrier_freq = rx_high_carrier_freq; |
| |
| /* print out parameters */ |
| ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int) |
| itdev->params.hw_tx_capable); |
| ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long) |
| itdev->params.sample_period); |
| ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int) |
| itdev->params.tx_carrier_freq); |
| ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int) |
| itdev->params.tx_duty_cycle); |
| ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int) |
| itdev->params.rx_low_carrier_freq); |
| ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int) |
| itdev->params.rx_high_carrier_freq); |
| |
| /* set up hardware initial state */ |
| itdev->params.init_hardware(itdev); |
| |
| /* set up ir-core props */ |
| rdev->priv = itdev; |
| rdev->driver_type = RC_DRIVER_IR_RAW; |
| rdev->allowed_protocols = RC_BIT_ALL; |
| rdev->open = ite_open; |
| rdev->close = ite_close; |
| rdev->s_idle = ite_s_idle; |
| rdev->s_rx_carrier_range = ite_set_rx_carrier_range; |
| rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT; |
| rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT; |
| rdev->timeout = ITE_IDLE_TIMEOUT; |
| rdev->rx_resolution = ITE_BAUDRATE_DIVISOR * |
| itdev->params.sample_period; |
| rdev->tx_resolution = ITE_BAUDRATE_DIVISOR * |
| itdev->params.sample_period; |
| |
| /* set up transmitter related values if needed */ |
| if (itdev->params.hw_tx_capable) { |
| rdev->tx_ir = ite_tx_ir; |
| rdev->s_tx_carrier = ite_set_tx_carrier; |
| rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle; |
| } |
| |
| rdev->input_name = dev_desc->model; |
| rdev->input_id.bustype = BUS_HOST; |
| rdev->input_id.vendor = PCI_VENDOR_ID_ITE; |
| rdev->input_id.product = 0; |
| rdev->input_id.version = 0; |
| rdev->driver_name = ITE_DRIVER_NAME; |
| rdev->map_name = RC_MAP_RC6_MCE; |
| |
| ret = rc_register_device(rdev); |
| if (ret) |
| goto exit_free_dev_rdev; |
| |
| ret = -EBUSY; |
| /* now claim resources */ |
| if (!request_region(itdev->cir_addr, |
| dev_desc->io_region_size, ITE_DRIVER_NAME)) |
| goto exit_unregister_device; |
| |
| if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED, |
| ITE_DRIVER_NAME, (void *)itdev)) |
| goto exit_release_cir_addr; |
| |
| ite_pr(KERN_NOTICE, "driver has been successfully loaded\n"); |
| |
| return 0; |
| |
| exit_release_cir_addr: |
| release_region(itdev->cir_addr, itdev->params.io_region_size); |
| exit_unregister_device: |
| rc_unregister_device(rdev); |
| rdev = NULL; |
| exit_free_dev_rdev: |
| rc_free_device(rdev); |
| kfree(itdev); |
| |
| return ret; |
| } |
| |
| static void ite_remove(struct pnp_dev *pdev) |
| { |
| struct ite_dev *dev = pnp_get_drvdata(pdev); |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* disable hardware */ |
| dev->params.disable(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| /* free resources */ |
| free_irq(dev->cir_irq, dev); |
| release_region(dev->cir_addr, dev->params.io_region_size); |
| |
| rc_unregister_device(dev->rdev); |
| |
| kfree(dev); |
| } |
| |
| static int ite_suspend(struct pnp_dev *pdev, pm_message_t state) |
| { |
| struct ite_dev *dev = pnp_get_drvdata(pdev); |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| /* wait for any transmission to end */ |
| wait_event_interruptible(dev->tx_ended, !dev->transmitting); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* disable all interrupts */ |
| dev->params.disable(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| static int ite_resume(struct pnp_dev *pdev) |
| { |
| int ret = 0; |
| struct ite_dev *dev = pnp_get_drvdata(pdev); |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* reinitialize hardware config registers */ |
| dev->params.init_hardware(dev); |
| /* enable the receiver */ |
| dev->params.enable_rx(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return ret; |
| } |
| |
| static void ite_shutdown(struct pnp_dev *pdev) |
| { |
| struct ite_dev *dev = pnp_get_drvdata(pdev); |
| unsigned long flags; |
| |
| ite_dbg("%s called", __func__); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* disable all interrupts */ |
| dev->params.disable(dev); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| } |
| |
| static struct pnp_driver ite_driver = { |
| .name = ITE_DRIVER_NAME, |
| .id_table = ite_ids, |
| .probe = ite_probe, |
| .remove = ite_remove, |
| .suspend = ite_suspend, |
| .resume = ite_resume, |
| .shutdown = ite_shutdown, |
| }; |
| |
| static int __init ite_init(void) |
| { |
| return pnp_register_driver(&ite_driver); |
| } |
| |
| static void __exit ite_exit(void) |
| { |
| pnp_unregister_driver(&ite_driver); |
| } |
| |
| MODULE_DEVICE_TABLE(pnp, ite_ids); |
| MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver"); |
| |
| MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(ite_init); |
| module_exit(ite_exit); |