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70ef69915b
linux_dsm_epyc7002/drivers/media/rc/ite-cir.c
Matthijs Kooijman 70ef69915b [media] rc: Make probe cleanup goto labels more verbose 
Before, labels were simply numbered. Now, the labels are named after the
cleanup action they'll perform (first), based on how the winbond-cir
driver does it. This makes the code a bit more clear and makes changes
in the ordering of labels easier to review.
This change is applied only to the rc drivers that do significant
cleanup in their probe functions: ati-remote, ene-ir, fintek-cir,
gpio-ir-recv, ite-cir, nuvoton-cir.
This commit should not change any code, it just renames goto labels.

[mchehab@redhat.com: removed changes at gpio-ir-recv.c, due to
 merge conflicts]

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-12-21 18:26:08 -02:00

1729 lines
46 KiB
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/*
* 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_protos = 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 = -EBUSY;
/* now claim resources */
if (!request_region(itdev->cir_addr,
dev_desc->io_region_size, ITE_DRIVER_NAME))
goto exit_free_dev_rdev;
if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
ITE_DRIVER_NAME, (void *)itdev))
goto exit_release_cir_addr;
ret = rc_register_device(rdev);
if (ret)
goto exit_free_irq;
ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
return 0;
exit_free_irq:
free_irq(itdev->cir_irq, itdev);
exit_release_cir_addr:
release_region(itdev->cir_addr, itdev->params.io_region_size);
exit_free_dev_rdev:
rc_free_device(rdev);
kfree(itdev);
return ret;
}
static void __devexit 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 = __devexit_p(ite_remove),
.suspend = ite_suspend,
.resume = ite_resume,
.shutdown = ite_shutdown,
};
static int ite_init(void)
{
return pnp_register_driver(&ite_driver);
}
static void 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);
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