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;
}
/* 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);
}
/* 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;
}
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;
}
/* 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);
}
static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
{
int fifo, read = 0;
ite_dbg("%s called", __func__);
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--;
}
it8709_wm(dev, 0, IT8709_RFSR);
return read;
}
/* 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);
}
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_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);
if (dev->transmitting) {
/* wake up the transmitter */
wake_up_interruptible(&dev->tx_queue);
} else {
/* enable the receiver */
dev->params.enable_rx(dev);
}
spin_unlock_irqrestore(&dev->lock, flags);
return ret;
}
/* 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;
}
/* 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;
}
/* 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;
}
/* 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 = 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);
exit_free_dev_rdev:
rc_free_device(rdev);
kfree(itdev);
return ret;
}
/* 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;
}
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;
rdev = rc_allocate_device();
if (!rdev)
goto failure;
ret = -ENODEV;
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);
dev_desc = &ite_dev_descs[model_no];
io_rsrc_no = dev_desc->io_rsrc_no;
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 failure;
}
if (!pnp_irq_valid(pdev, 0)) {
dev_err(&pdev->dev, "PNP IRQ not valid!\n");
goto failure;
}
itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no);
itdev->cir_irq = pnp_irq(pdev, 0);
spin_lock_init(&itdev->lock);
init_ir_raw_event(&itdev->rawir);
pnp_set_drvdata(pdev, itdev);
itdev->pdev = pdev;
init_waitqueue_head(&itdev->tx_queue);
init_waitqueue_head(&itdev->tx_ended);
itdev->params = *dev_desc;
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;
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);
itdev->params.init_hardware(itdev);
rdev->priv = itdev;
rdev->driver_type = RC_DRIVER_IR_RAW;
rdev->allowed_protos = RC_TYPE_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;
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;
if (!request_region(itdev->cir_addr,
dev_desc->io_region_size, ITE_DRIVER_NAME))
goto failure;
if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
ITE_DRIVER_NAME, (void *)itdev))
goto failure;
ret = rc_register_device(rdev);
if (ret)
goto failure;
itdev->rdev = rdev;
ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
return 0;
failure:
if (itdev->cir_irq)
free_irq(itdev->cir_irq, itdev);
if (itdev->cir_addr)
release_region(itdev->cir_addr, itdev->params.io_region_size);
rc_free_device(rdev);
kfree(itdev);
return ret;
}
/* 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;
}
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__);
memset(last_sent, 0, ARRAY_SIZE(last_sent));
spin_lock_irqsave(&dev->lock, flags);
dev->transmitting = true;
ite_set_carrier_params(dev);
max_rle_us =
(ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
ITE_TX_MAX_RLE) / 1000;
dev->params.disable_rx(dev);
fifo_avail =
ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
while (n > 0 && dev->in_use) {
is_pulse = !is_pulse;
remaining_us = *(txbuf++);
n--;
ite_dbg("%s: %ld",
((is_pulse) ? "pulse" : "space"),
(long int)
remaining_us);
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;
val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
last_sent[last_idx++] = val;
last_idx &= (ITE_TX_FIFO_LEN);
val = (val - 1) & ITE_TX_RLE_MASK;
if (is_pulse)
val |= ITE_TX_PULSE;
else
val |= ITE_TX_SPACE;
if (fifo_avail <= 0)
fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
if (fifo_avail <= 0) {
dev->params.
enable_tx_interrupt(dev);
spin_unlock_irqrestore(&dev->lock, flags);
wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
spin_lock_irqsave(&dev->lock, flags);
dev->params.
disable_tx_interrupt(dev);
}
dev->params.put_tx_byte(dev, val);
fifo_avail--;
}
}
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);
spin_unlock_irqrestore(&dev->lock, flags);
mdelay(DIV_ROUND_UP(remaining_us, 1000));
spin_lock_irqsave(&dev->lock, flags);
dev->transmitting = false;
ite_set_carrier_params(dev);
if (dev->in_use)
dev->params.enable_rx(dev);
wake_up_interruptible(&dev->tx_ended);
spin_unlock_irqrestore(&dev->lock, flags);
return ret;
}
