2
* Driver for ITE Tech Inc. IT8712F/IT8512 CIR
4
* Copyright (C) 2010 Juan Jesús García de Soria <skandalfo@gmail.com>
6
* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21
* Inspired by the original lirc_it87 and lirc_ite8709 drivers, on top of the
22
* skeleton provided by the nuvoton-cir driver.
24
* The lirc_it87 driver was originally written by Hans-Gunter Lutke Uphues
25
* <hg_lu@web.de> in 2001, with enhancements by Christoph Bartelmus
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* <lirc@bartelmus.de>, Andrew Calkin <r_tay@hotmail.com> and James Edwards
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* <jimbo-lirc@edwardsclan.net>.
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* The lirc_ite8709 driver was written by Grégory Lardière
30
* <spmf2004-lirc@yahoo.fr> in 2008.
33
#include <linux/kernel.h>
34
#include <linux/module.h>
35
#include <linux/pnp.h>
37
#include <linux/interrupt.h>
38
#include <linux/sched.h>
39
#include <linux/delay.h>
40
#include <linux/slab.h>
41
#include <linux/input.h>
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#include <linux/bitops.h>
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#include <media/rc-core.h>
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#include <linux/pci_ids.h>
45
#include <linux/delay.h>
49
/* module parameters */
53
module_param(debug, int, S_IRUGO | S_IWUSR);
54
MODULE_PARM_DESC(debug, "Enable debugging output");
56
/* low limit for RX carrier freq, Hz, 0 for no RX demodulation */
57
static int rx_low_carrier_freq;
58
module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, "
60
"0 for no RX demodulation");
62
/* high limit for RX carrier freq, Hz, 0 for no RX demodulation */
63
static int rx_high_carrier_freq;
64
module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR);
65
MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, "
66
"Hz, 0 for no RX demodulation");
68
/* override tx carrier frequency */
69
static int tx_carrier_freq;
70
module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR);
71
MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz");
73
/* override tx duty cycle */
74
static int tx_duty_cycle;
75
module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR);
76
MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100");
78
/* override default sample period */
79
static long sample_period;
80
module_param(sample_period, long, S_IRUGO | S_IWUSR);
81
MODULE_PARM_DESC(sample_period, "Override carrier sample period, us");
83
/* override detected model id */
84
static int model_number = -1;
85
module_param(model_number, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect");
89
/* HW-independent code functions */
91
/* check whether carrier frequency is high frequency */
92
static inline bool ite_is_high_carrier_freq(unsigned int freq)
94
return freq >= ITE_HCF_MIN_CARRIER_FREQ;
97
/* get the bits required to program the carrier frequency in CFQ bits,
99
static u8 ite_get_carrier_freq_bits(unsigned int freq)
101
if (ite_is_high_carrier_freq(freq)) {
105
else if (freq < 465000)
108
else if (freq < 490000)
115
if (freq < ITE_LCF_MIN_CARRIER_FREQ)
116
freq = ITE_LCF_MIN_CARRIER_FREQ;
117
if (freq > ITE_LCF_MAX_CARRIER_FREQ)
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freq = ITE_LCF_MAX_CARRIER_FREQ;
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/* convert to kHz and subtract the base freq */
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DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ,
129
/* get the bits required to program the pulse with in TXMPW */
130
static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle)
132
unsigned long period_ns, on_ns;
134
/* sanitize freq into range */
135
if (freq < ITE_LCF_MIN_CARRIER_FREQ)
136
freq = ITE_LCF_MIN_CARRIER_FREQ;
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if (freq > ITE_HCF_MAX_CARRIER_FREQ)
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freq = ITE_HCF_MAX_CARRIER_FREQ;
140
period_ns = 1000000000UL / freq;
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on_ns = period_ns * duty_cycle / 100;
143
if (ite_is_high_carrier_freq(freq)) {
147
else if (on_ns < 850)
150
else if (on_ns < 950)
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else if (on_ns < 1080)
162
else if (on_ns < 7850)
165
else if (on_ns < 9650)
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else if (on_ns < 11950)
176
/* decode raw bytes as received by the hardware, and push them to the ir-core
178
static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int
182
unsigned long *ldata;
183
unsigned int next_one, next_zero, size;
184
DEFINE_IR_RAW_EVENT(ev);
189
sample_period = dev->params.sample_period;
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ldata = (unsigned long *)data;
192
next_one = find_next_bit_le(ldata, size, 0);
196
ITE_BITS_TO_NS(next_one, sample_period);
197
ir_raw_event_store_with_filter(dev->rdev, &ev);
200
while (next_one < size) {
201
next_zero = find_next_zero_bit_le(ldata, size, next_one + 1);
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ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period);
204
ir_raw_event_store_with_filter(dev->rdev, &ev);
206
if (next_zero < size) {
208
find_next_bit_le(ldata,
213
ITE_BITS_TO_NS(next_one - next_zero,
215
ir_raw_event_store_with_filter
221
ir_raw_event_handle(dev->rdev);
223
ite_dbg_verbose("decoded %d bytes.", length);
226
/* set all the rx/tx carrier parameters; this must be called with the device
228
static void ite_set_carrier_params(struct ite_dev *dev)
230
unsigned int freq, low_freq, high_freq;
232
bool use_demodulator;
233
bool for_tx = dev->transmitting;
235
ite_dbg("%s called", __func__);
238
/* we don't need no stinking calculations */
239
freq = dev->params.tx_carrier_freq;
240
allowance = ITE_RXDCR_DEFAULT;
241
use_demodulator = false;
243
low_freq = dev->params.rx_low_carrier_freq;
244
high_freq = dev->params.rx_high_carrier_freq;
247
/* don't demodulate */
249
ITE_DEFAULT_CARRIER_FREQ;
250
allowance = ITE_RXDCR_DEFAULT;
251
use_demodulator = false;
253
/* calculate the middle freq */
254
freq = (low_freq + high_freq) / 2;
256
/* calculate the allowance */
258
DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq),
259
ITE_RXDCR_PER_10000_STEP
260
* (high_freq + low_freq));
265
if (allowance > ITE_RXDCR_MAX)
266
allowance = ITE_RXDCR_MAX;
270
/* set the carrier parameters in a device-dependent way */
271
dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq),
272
use_demodulator, ite_get_carrier_freq_bits(freq), allowance,
273
ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle));
276
/* interrupt service routine for incoming and outgoing CIR data */
277
static irqreturn_t ite_cir_isr(int irq, void *data)
279
struct ite_dev *dev = data;
281
irqreturn_t ret = IRQ_RETVAL(IRQ_NONE);
282
u8 rx_buf[ITE_RX_FIFO_LEN];
286
ite_dbg_verbose("%s firing", __func__);
288
/* grab the spinlock */
289
spin_lock_irqsave(&dev->lock, flags);
291
/* read the interrupt flags */
292
iflags = dev->params.get_irq_causes(dev);
294
/* check for the receive interrupt */
295
if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
296
/* read the FIFO bytes */
298
dev->params.get_rx_bytes(dev, rx_buf,
302
/* drop the spinlock, since the ir-core layer
303
* may call us back again through
305
spin_unlock_irqrestore(&dev->
309
/* decode the data we've just received */
310
ite_decode_bytes(dev, rx_buf,
313
/* reacquire the spinlock */
314
spin_lock_irqsave(&dev->lock,
317
/* mark the interrupt as serviced */
318
ret = IRQ_RETVAL(IRQ_HANDLED);
320
} else if (iflags & ITE_IRQ_TX_FIFO) {
321
/* FIFO space available interrupt */
322
ite_dbg_verbose("got interrupt for TX FIFO");
324
/* wake any sleeping transmitter */
325
wake_up_interruptible(&dev->tx_queue);
327
/* mark the interrupt as serviced */
328
ret = IRQ_RETVAL(IRQ_HANDLED);
331
/* drop the spinlock */
332
spin_unlock_irqrestore(&dev->lock, flags);
334
ite_dbg_verbose("%s done returning %d", __func__, (int)ret);
339
/* set the rx carrier freq range, guess it's in Hz... */
340
static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32
344
struct ite_dev *dev = rcdev->priv;
346
spin_lock_irqsave(&dev->lock, flags);
347
dev->params.rx_low_carrier_freq = carrier_low;
348
dev->params.rx_high_carrier_freq = carrier_high;
349
ite_set_carrier_params(dev);
350
spin_unlock_irqrestore(&dev->lock, flags);
355
/* set the tx carrier freq, guess it's in Hz... */
356
static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
359
struct ite_dev *dev = rcdev->priv;
361
spin_lock_irqsave(&dev->lock, flags);
362
dev->params.tx_carrier_freq = carrier;
363
ite_set_carrier_params(dev);
364
spin_unlock_irqrestore(&dev->lock, flags);
369
/* set the tx duty cycle by controlling the pulse width */
370
static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle)
373
struct ite_dev *dev = rcdev->priv;
375
spin_lock_irqsave(&dev->lock, flags);
376
dev->params.tx_duty_cycle = duty_cycle;
377
ite_set_carrier_params(dev);
378
spin_unlock_irqrestore(&dev->lock, flags);
383
/* transmit out IR pulses; what you get here is a batch of alternating
384
* pulse/space/pulse/space lengths that we should write out completely through
385
* the FIFO, blocking on a full FIFO */
386
static int ite_tx_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
389
struct ite_dev *dev = rcdev->priv;
390
bool is_pulse = false;
391
int remaining_us, fifo_avail, fifo_remaining, last_idx = 0;
392
int max_rle_us, next_rle_us;
394
u8 last_sent[ITE_TX_FIFO_LEN];
397
ite_dbg("%s called", __func__);
399
/* clear the array just in case */
400
memset(last_sent, 0, ARRAY_SIZE(last_sent));
402
/* n comes in bytes; convert to ints */
405
spin_lock_irqsave(&dev->lock, flags);
407
/* let everybody know we're now transmitting */
408
dev->transmitting = true;
410
/* and set the carrier values for transmission */
411
ite_set_carrier_params(dev);
413
/* calculate how much time we can send in one byte */
415
(ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
416
ITE_TX_MAX_RLE) / 1000;
418
/* disable the receiver */
419
dev->params.disable_rx(dev);
421
/* this is where we'll begin filling in the FIFO, until it's full.
422
* then we'll just activate the interrupt, wait for it to wake us up
423
* again, disable it, continue filling the FIFO... until everything
424
* has been pushed out */
426
ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
428
while (n > 0 && dev->in_use) {
429
/* transmit the next sample */
430
is_pulse = !is_pulse;
431
remaining_us = *(txbuf++);
435
((is_pulse) ? "pulse" : "space"),
439
/* repeat while the pulse is non-zero length */
440
while (remaining_us > 0 && dev->in_use) {
441
if (remaining_us > max_rle_us)
442
next_rle_us = max_rle_us;
445
next_rle_us = remaining_us;
447
remaining_us -= next_rle_us;
449
/* check what's the length we have to pump out */
450
val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
452
/* put it into the sent buffer */
453
last_sent[last_idx++] = val;
454
last_idx &= (ITE_TX_FIFO_LEN);
456
/* encode it for 7 bits */
457
val = (val - 1) & ITE_TX_RLE_MASK;
459
/* take into account pulse/space prefix */
467
* if we get to 0 available, read again, just in case
468
* some other slot got freed
471
fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
473
/* if it's still full */
474
if (fifo_avail <= 0) {
475
/* enable the tx interrupt */
477
enable_tx_interrupt(dev);
479
/* drop the spinlock */
480
spin_unlock_irqrestore(&dev->lock, flags);
482
/* wait for the FIFO to empty enough */
483
wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
485
/* get the spinlock again */
486
spin_lock_irqsave(&dev->lock, flags);
488
/* disable the tx interrupt again. */
490
disable_tx_interrupt(dev);
493
/* now send the byte through the FIFO */
494
dev->params.put_tx_byte(dev, val);
499
/* wait and don't return until the whole FIFO has been sent out;
500
* otherwise we could configure the RX carrier params instead of the
501
* TX ones while the transmission is still being performed! */
502
fifo_remaining = dev->params.get_tx_used_slots(dev);
504
while (fifo_remaining > 0) {
507
last_idx &= (ITE_TX_FIFO_LEN - 1);
508
remaining_us += last_sent[last_idx];
510
remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE);
512
/* drop the spinlock while we sleep */
513
spin_unlock_irqrestore(&dev->lock, flags);
515
/* sleep remaining_us microseconds */
516
mdelay(DIV_ROUND_UP(remaining_us, 1000));
518
/* reacquire the spinlock */
519
spin_lock_irqsave(&dev->lock, flags);
521
/* now we're not transmitting anymore */
522
dev->transmitting = false;
524
/* and set the carrier values for reception */
525
ite_set_carrier_params(dev);
527
/* reenable the receiver */
529
dev->params.enable_rx(dev);
531
/* notify transmission end */
532
wake_up_interruptible(&dev->tx_ended);
534
spin_unlock_irqrestore(&dev->lock, flags);
539
/* idle the receiver if needed */
540
static void ite_s_idle(struct rc_dev *rcdev, bool enable)
543
struct ite_dev *dev = rcdev->priv;
545
ite_dbg("%s called", __func__);
548
spin_lock_irqsave(&dev->lock, flags);
549
dev->params.idle_rx(dev);
550
spin_unlock_irqrestore(&dev->lock, flags);
555
/* IT8712F HW-specific functions */
557
/* retrieve a bitmask of the current causes for a pending interrupt; this may
558
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
560
static int it87_get_irq_causes(struct ite_dev *dev)
565
ite_dbg("%s called", __func__);
567
/* read the interrupt flags */
568
iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II;
572
ret = ITE_IRQ_RX_FIFO;
575
ret = ITE_IRQ_RX_FIFO_OVERRUN;
578
ret = ITE_IRQ_TX_FIFO;
585
/* set the carrier parameters; to be called with the spinlock held */
586
static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq,
587
bool use_demodulator,
588
u8 carrier_freq_bits, u8 allowance_bits,
593
ite_dbg("%s called", __func__);
595
/* program the RCR register */
596
val = inb(dev->cir_addr + IT87_RCR)
597
& ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR);
605
val |= allowance_bits;
607
outb(val, dev->cir_addr + IT87_RCR);
609
/* program the TCR2 register */
610
outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits,
611
dev->cir_addr + IT87_TCR2);
614
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
616
static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
620
ite_dbg("%s called", __func__);
622
/* read how many bytes are still in the FIFO */
623
fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC;
625
while (fifo > 0 && buf_size > 0) {
626
*(buf++) = inb(dev->cir_addr + IT87_DR);
635
/* return how many bytes are still in the FIFO; this will be called
636
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
637
* empty; let's expect this won't be a problem */
638
static int it87_get_tx_used_slots(struct ite_dev *dev)
640
ite_dbg("%s called", __func__);
642
return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC;
645
/* put a byte to the TX fifo; this should be called with the spinlock held */
646
static void it87_put_tx_byte(struct ite_dev *dev, u8 value)
648
outb(value, dev->cir_addr + IT87_DR);
651
/* idle the receiver so that we won't receive samples until another
652
pulse is detected; this must be called with the device spinlock held */
653
static void it87_idle_rx(struct ite_dev *dev)
655
ite_dbg("%s called", __func__);
657
/* disable streaming by clearing RXACT writing it as 1 */
658
outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT,
659
dev->cir_addr + IT87_RCR);
662
outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR,
663
dev->cir_addr + IT87_TCR1);
666
/* disable the receiver; this must be called with the device spinlock held */
667
static void it87_disable_rx(struct ite_dev *dev)
669
ite_dbg("%s called", __func__);
671
/* disable the receiver interrupts */
672
outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE),
673
dev->cir_addr + IT87_IER);
675
/* disable the receiver */
676
outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN,
677
dev->cir_addr + IT87_RCR);
679
/* clear the FIFO and RXACT (actually RXACT should have been cleared
680
* in the previous outb() call) */
684
/* enable the receiver; this must be called with the device spinlock held */
685
static void it87_enable_rx(struct ite_dev *dev)
687
ite_dbg("%s called", __func__);
689
/* enable the receiver by setting RXEN */
690
outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN,
691
dev->cir_addr + IT87_RCR);
693
/* just prepare it to idle for the next reception */
696
/* enable the receiver interrupts and master enable flag */
697
outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC,
698
dev->cir_addr + IT87_IER);
701
/* disable the transmitter interrupt; this must be called with the device
703
static void it87_disable_tx_interrupt(struct ite_dev *dev)
705
ite_dbg("%s called", __func__);
707
/* disable the transmitter interrupts */
708
outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE,
709
dev->cir_addr + IT87_IER);
712
/* enable the transmitter interrupt; this must be called with the device
714
static void it87_enable_tx_interrupt(struct ite_dev *dev)
716
ite_dbg("%s called", __func__);
718
/* enable the transmitter interrupts and master enable flag */
719
outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC,
720
dev->cir_addr + IT87_IER);
723
/* disable the device; this must be called with the device spinlock held */
724
static void it87_disable(struct ite_dev *dev)
726
ite_dbg("%s called", __func__);
728
/* clear out all interrupt enable flags */
729
outb(inb(dev->cir_addr + IT87_IER) &
730
~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE),
731
dev->cir_addr + IT87_IER);
733
/* disable the receiver */
734
it87_disable_rx(dev);
737
outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1),
738
dev->cir_addr + IT87_TCR1);
741
/* initialize the hardware */
742
static void it87_init_hardware(struct ite_dev *dev)
744
ite_dbg("%s called", __func__);
746
/* enable just the baud rate divisor register,
747
disabling all the interrupts at the same time */
748
outb((inb(dev->cir_addr + IT87_IER) &
749
~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR,
750
dev->cir_addr + IT87_IER);
752
/* write out the baud rate divisor */
753
outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR);
754
outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR);
756
/* disable the baud rate divisor register again */
757
outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR,
758
dev->cir_addr + IT87_IER);
760
/* program the RCR register defaults */
761
outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR);
763
/* program the TCR1 register */
764
outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE
765
| IT87_FIFOTL_DEFAULT | IT87_FIFOCLR,
766
dev->cir_addr + IT87_TCR1);
768
/* program the carrier parameters */
769
ite_set_carrier_params(dev);
772
/* IT8512F on ITE8708 HW-specific functions */
774
/* retrieve a bitmask of the current causes for a pending interrupt; this may
775
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
777
static int it8708_get_irq_causes(struct ite_dev *dev)
782
ite_dbg("%s called", __func__);
784
/* read the interrupt flags */
785
iflags = inb(dev->cir_addr + IT8708_C0IIR);
787
if (iflags & IT85_TLDLI)
788
ret |= ITE_IRQ_TX_FIFO;
789
if (iflags & IT85_RDAI)
790
ret |= ITE_IRQ_RX_FIFO;
791
if (iflags & IT85_RFOI)
792
ret |= ITE_IRQ_RX_FIFO_OVERRUN;
797
/* set the carrier parameters; to be called with the spinlock held */
798
static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq,
799
bool use_demodulator,
800
u8 carrier_freq_bits, u8 allowance_bits,
805
ite_dbg("%s called", __func__);
807
/* program the C0CFR register, with HRAE=1 */
808
outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
809
dev->cir_addr + IT8708_BANKSEL);
811
val = (inb(dev->cir_addr + IT8708_C0CFR)
812
& ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits;
817
outb(val, dev->cir_addr + IT8708_C0CFR);
819
outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
820
dev->cir_addr + IT8708_BANKSEL);
822
/* program the C0RCR register */
823
val = inb(dev->cir_addr + IT8708_C0RCR)
824
& ~(IT85_RXEND | IT85_RXDCR);
829
val |= allowance_bits;
831
outb(val, dev->cir_addr + IT8708_C0RCR);
833
/* program the C0TCR register */
834
val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW;
835
val |= pulse_width_bits;
836
outb(val, dev->cir_addr + IT8708_C0TCR);
839
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
841
static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
845
ite_dbg("%s called", __func__);
847
/* read how many bytes are still in the FIFO */
848
fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC;
850
while (fifo > 0 && buf_size > 0) {
851
*(buf++) = inb(dev->cir_addr + IT8708_C0DR);
860
/* return how many bytes are still in the FIFO; this will be called
861
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
862
* empty; let's expect this won't be a problem */
863
static int it8708_get_tx_used_slots(struct ite_dev *dev)
865
ite_dbg("%s called", __func__);
867
return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC;
870
/* put a byte to the TX fifo; this should be called with the spinlock held */
871
static void it8708_put_tx_byte(struct ite_dev *dev, u8 value)
873
outb(value, dev->cir_addr + IT8708_C0DR);
876
/* idle the receiver so that we won't receive samples until another
877
pulse is detected; this must be called with the device spinlock held */
878
static void it8708_idle_rx(struct ite_dev *dev)
880
ite_dbg("%s called", __func__);
882
/* disable streaming by clearing RXACT writing it as 1 */
883
outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT,
884
dev->cir_addr + IT8708_C0RCR);
887
outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR,
888
dev->cir_addr + IT8708_C0MSTCR);
891
/* disable the receiver; this must be called with the device spinlock held */
892
static void it8708_disable_rx(struct ite_dev *dev)
894
ite_dbg("%s called", __func__);
896
/* disable the receiver interrupts */
897
outb(inb(dev->cir_addr + IT8708_C0IER) &
898
~(IT85_RDAIE | IT85_RFOIE),
899
dev->cir_addr + IT8708_C0IER);
901
/* disable the receiver */
902
outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN,
903
dev->cir_addr + IT8708_C0RCR);
905
/* clear the FIFO and RXACT (actually RXACT should have been cleared
906
* in the previous outb() call) */
910
/* enable the receiver; this must be called with the device spinlock held */
911
static void it8708_enable_rx(struct ite_dev *dev)
913
ite_dbg("%s called", __func__);
915
/* enable the receiver by setting RXEN */
916
outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN,
917
dev->cir_addr + IT8708_C0RCR);
919
/* just prepare it to idle for the next reception */
922
/* enable the receiver interrupts and master enable flag */
923
outb(inb(dev->cir_addr + IT8708_C0IER)
924
|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
925
dev->cir_addr + IT8708_C0IER);
928
/* disable the transmitter interrupt; this must be called with the device
930
static void it8708_disable_tx_interrupt(struct ite_dev *dev)
932
ite_dbg("%s called", __func__);
934
/* disable the transmitter interrupts */
935
outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE,
936
dev->cir_addr + IT8708_C0IER);
939
/* enable the transmitter interrupt; this must be called with the device
941
static void it8708_enable_tx_interrupt(struct ite_dev *dev)
943
ite_dbg("%s called", __func__);
945
/* enable the transmitter interrupts and master enable flag */
946
outb(inb(dev->cir_addr + IT8708_C0IER)
947
|IT85_TLDLIE | IT85_IEC,
948
dev->cir_addr + IT8708_C0IER);
951
/* disable the device; this must be called with the device spinlock held */
952
static void it8708_disable(struct ite_dev *dev)
954
ite_dbg("%s called", __func__);
956
/* clear out all interrupt enable flags */
957
outb(inb(dev->cir_addr + IT8708_C0IER) &
958
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
959
dev->cir_addr + IT8708_C0IER);
961
/* disable the receiver */
962
it8708_disable_rx(dev);
965
outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR),
966
dev->cir_addr + IT8708_C0MSTCR);
969
/* initialize the hardware */
970
static void it8708_init_hardware(struct ite_dev *dev)
972
ite_dbg("%s called", __func__);
974
/* disable all the interrupts */
975
outb(inb(dev->cir_addr + IT8708_C0IER) &
976
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
977
dev->cir_addr + IT8708_C0IER);
979
/* program the baud rate divisor */
980
outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
981
dev->cir_addr + IT8708_BANKSEL);
983
outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR);
984
outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
985
dev->cir_addr + IT8708_C0BDHR);
987
outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
988
dev->cir_addr + IT8708_BANKSEL);
990
/* program the C0MSTCR register defaults */
991
outb((inb(dev->cir_addr + IT8708_C0MSTCR) &
992
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
993
IT85_FIFOCLR | IT85_RESET)) |
995
dev->cir_addr + IT8708_C0MSTCR);
997
/* program the C0RCR register defaults */
998
outb((inb(dev->cir_addr + IT8708_C0RCR) &
999
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND |
1000
IT85_RXACT | IT85_RXDCR)) |
1002
dev->cir_addr + IT8708_C0RCR);
1004
/* program the C0TCR register defaults */
1005
outb((inb(dev->cir_addr + IT8708_C0TCR) &
1006
~(IT85_TXMPM | IT85_TXMPW))
1007
|IT85_TXRLE | IT85_TXENDF |
1008
IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT,
1009
dev->cir_addr + IT8708_C0TCR);
1011
/* program the carrier parameters */
1012
ite_set_carrier_params(dev);
1015
/* IT8512F on ITE8709 HW-specific functions */
1017
/* read a byte from the SRAM module */
1018
static inline u8 it8709_rm(struct ite_dev *dev, int index)
1020
outb(index, dev->cir_addr + IT8709_RAM_IDX);
1021
return inb(dev->cir_addr + IT8709_RAM_VAL);
1024
/* write a byte to the SRAM module */
1025
static inline void it8709_wm(struct ite_dev *dev, u8 val, int index)
1027
outb(index, dev->cir_addr + IT8709_RAM_IDX);
1028
outb(val, dev->cir_addr + IT8709_RAM_VAL);
1031
static void it8709_wait(struct ite_dev *dev)
1035
* loop until device tells it's ready to continue
1036
* iterations count is usually ~750 but can sometimes achieve 13000
1038
for (i = 0; i < 15000; i++) {
1040
if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE)
1045
/* read the value of a CIR register */
1046
static u8 it8709_rr(struct ite_dev *dev, int index)
1048
/* just wait in case the previous access was a write */
1050
it8709_wm(dev, index, IT8709_REG_IDX);
1051
it8709_wm(dev, IT8709_READ, IT8709_MODE);
1053
/* wait for the read data to be available */
1056
/* return the read value */
1057
return it8709_rm(dev, IT8709_REG_VAL);
1060
/* write the value of a CIR register */
1061
static void it8709_wr(struct ite_dev *dev, u8 val, int index)
1063
/* we wait before writing, and not afterwards, since this allows us to
1064
* pipeline the host CPU with the microcontroller */
1066
it8709_wm(dev, val, IT8709_REG_VAL);
1067
it8709_wm(dev, index, IT8709_REG_IDX);
1068
it8709_wm(dev, IT8709_WRITE, IT8709_MODE);
1071
/* retrieve a bitmask of the current causes for a pending interrupt; this may
1072
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
1074
static int it8709_get_irq_causes(struct ite_dev *dev)
1079
ite_dbg("%s called", __func__);
1081
/* read the interrupt flags */
1082
iflags = it8709_rm(dev, IT8709_IIR);
1084
if (iflags & IT85_TLDLI)
1085
ret |= ITE_IRQ_TX_FIFO;
1086
if (iflags & IT85_RDAI)
1087
ret |= ITE_IRQ_RX_FIFO;
1088
if (iflags & IT85_RFOI)
1089
ret |= ITE_IRQ_RX_FIFO_OVERRUN;
1094
/* set the carrier parameters; to be called with the spinlock held */
1095
static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
1096
bool use_demodulator,
1097
u8 carrier_freq_bits, u8 allowance_bits,
1098
u8 pulse_width_bits)
1102
ite_dbg("%s called", __func__);
1104
val = (it8709_rr(dev, IT85_C0CFR)
1105
&~(IT85_HCFS | IT85_CFQ)) |
1111
it8709_wr(dev, val, IT85_C0CFR);
1113
/* program the C0RCR register */
1114
val = it8709_rr(dev, IT85_C0RCR)
1115
& ~(IT85_RXEND | IT85_RXDCR);
1117
if (use_demodulator)
1120
val |= allowance_bits;
1122
it8709_wr(dev, val, IT85_C0RCR);
1124
/* program the C0TCR register */
1125
val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
1126
val |= pulse_width_bits;
1127
it8709_wr(dev, val, IT85_C0TCR);
1130
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
1132
static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
1136
ite_dbg("%s called", __func__);
1138
/* read how many bytes are still in the FIFO */
1139
fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC;
1141
while (fifo > 0 && buf_size > 0) {
1142
*(buf++) = it8709_rm(dev, IT8709_FIFO + read);
1148
/* 'clear' the FIFO by setting the writing index to 0; this is
1149
* completely bound to be racy, but we can't help it, since it's a
1150
* limitation of the protocol */
1151
it8709_wm(dev, 0, IT8709_RFSR);
1156
/* return how many bytes are still in the FIFO; this will be called
1157
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
1158
* empty; let's expect this won't be a problem */
1159
static int it8709_get_tx_used_slots(struct ite_dev *dev)
1161
ite_dbg("%s called", __func__);
1163
return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
1166
/* put a byte to the TX fifo; this should be called with the spinlock held */
1167
static void it8709_put_tx_byte(struct ite_dev *dev, u8 value)
1169
it8709_wr(dev, value, IT85_C0DR);
1172
/* idle the receiver so that we won't receive samples until another
1173
pulse is detected; this must be called with the device spinlock held */
1174
static void it8709_idle_rx(struct ite_dev *dev)
1176
ite_dbg("%s called", __func__);
1178
/* disable streaming by clearing RXACT writing it as 1 */
1179
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
1182
/* clear the FIFO */
1183
it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
1187
/* disable the receiver; this must be called with the device spinlock held */
1188
static void it8709_disable_rx(struct ite_dev *dev)
1190
ite_dbg("%s called", __func__);
1192
/* disable the receiver interrupts */
1193
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1194
~(IT85_RDAIE | IT85_RFOIE),
1197
/* disable the receiver */
1198
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
1201
/* clear the FIFO and RXACT (actually RXACT should have been cleared
1202
* in the previous it8709_wr(dev, ) call) */
1203
it8709_idle_rx(dev);
1206
/* enable the receiver; this must be called with the device spinlock held */
1207
static void it8709_enable_rx(struct ite_dev *dev)
1209
ite_dbg("%s called", __func__);
1211
/* enable the receiver by setting RXEN */
1212
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
1215
/* just prepare it to idle for the next reception */
1216
it8709_idle_rx(dev);
1218
/* enable the receiver interrupts and master enable flag */
1219
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1220
|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
1224
/* disable the transmitter interrupt; this must be called with the device
1226
static void it8709_disable_tx_interrupt(struct ite_dev *dev)
1228
ite_dbg("%s called", __func__);
1230
/* disable the transmitter interrupts */
1231
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
1235
/* enable the transmitter interrupt; this must be called with the device
1237
static void it8709_enable_tx_interrupt(struct ite_dev *dev)
1239
ite_dbg("%s called", __func__);
1241
/* enable the transmitter interrupts and master enable flag */
1242
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1243
|IT85_TLDLIE | IT85_IEC,
1247
/* disable the device; this must be called with the device spinlock held */
1248
static void it8709_disable(struct ite_dev *dev)
1250
ite_dbg("%s called", __func__);
1252
/* clear out all interrupt enable flags */
1253
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1254
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
1257
/* disable the receiver */
1258
it8709_disable_rx(dev);
1260
/* erase the FIFO */
1261
it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
1265
/* initialize the hardware */
1266
static void it8709_init_hardware(struct ite_dev *dev)
1268
ite_dbg("%s called", __func__);
1270
/* disable all the interrupts */
1271
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1272
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
1275
/* program the baud rate divisor */
1276
it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
1277
it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
1280
/* program the C0MSTCR register defaults */
1281
it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) &
1282
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL
1283
| IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT,
1286
/* program the C0RCR register defaults */
1287
it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) &
1288
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT
1289
| IT85_RXDCR)) | ITE_RXDCR_DEFAULT,
1292
/* program the C0TCR register defaults */
1293
it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW))
1294
| IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT
1295
| IT85_TXMPW_DEFAULT,
1298
/* program the carrier parameters */
1299
ite_set_carrier_params(dev);
1303
/* generic hardware setup/teardown code */
1305
/* activate the device for use */
1306
static int ite_open(struct rc_dev *rcdev)
1308
struct ite_dev *dev = rcdev->priv;
1309
unsigned long flags;
1311
ite_dbg("%s called", __func__);
1313
spin_lock_irqsave(&dev->lock, flags);
1316
/* enable the receiver */
1317
dev->params.enable_rx(dev);
1319
spin_unlock_irqrestore(&dev->lock, flags);
1324
/* deactivate the device for use */
1325
static void ite_close(struct rc_dev *rcdev)
1327
struct ite_dev *dev = rcdev->priv;
1328
unsigned long flags;
1330
ite_dbg("%s called", __func__);
1332
spin_lock_irqsave(&dev->lock, flags);
1333
dev->in_use = false;
1335
/* wait for any transmission to end */
1336
spin_unlock_irqrestore(&dev->lock, flags);
1337
wait_event_interruptible(dev->tx_ended, !dev->transmitting);
1338
spin_lock_irqsave(&dev->lock, flags);
1340
dev->params.disable(dev);
1342
spin_unlock_irqrestore(&dev->lock, flags);
1345
/* supported models and their parameters */
1346
static const struct ite_dev_params ite_dev_descs[] = {
1348
.model = "ITE8704 CIR transceiver",
1349
.io_region_size = IT87_IOREG_LENGTH,
1351
.hw_tx_capable = true,
1352
.sample_period = (u32) (1000000000ULL / 115200),
1353
.tx_carrier_freq = 38000,
1354
.tx_duty_cycle = 33,
1355
.rx_low_carrier_freq = 0,
1356
.rx_high_carrier_freq = 0,
1359
.get_irq_causes = it87_get_irq_causes,
1360
.enable_rx = it87_enable_rx,
1361
.idle_rx = it87_idle_rx,
1362
.disable_rx = it87_idle_rx,
1363
.get_rx_bytes = it87_get_rx_bytes,
1364
.enable_tx_interrupt = it87_enable_tx_interrupt,
1365
.disable_tx_interrupt = it87_disable_tx_interrupt,
1366
.get_tx_used_slots = it87_get_tx_used_slots,
1367
.put_tx_byte = it87_put_tx_byte,
1368
.disable = it87_disable,
1369
.init_hardware = it87_init_hardware,
1370
.set_carrier_params = it87_set_carrier_params,
1373
.model = "ITE8713 CIR transceiver",
1374
.io_region_size = IT87_IOREG_LENGTH,
1376
.hw_tx_capable = true,
1377
.sample_period = (u32) (1000000000ULL / 115200),
1378
.tx_carrier_freq = 38000,
1379
.tx_duty_cycle = 33,
1380
.rx_low_carrier_freq = 0,
1381
.rx_high_carrier_freq = 0,
1384
.get_irq_causes = it87_get_irq_causes,
1385
.enable_rx = it87_enable_rx,
1386
.idle_rx = it87_idle_rx,
1387
.disable_rx = it87_idle_rx,
1388
.get_rx_bytes = it87_get_rx_bytes,
1389
.enable_tx_interrupt = it87_enable_tx_interrupt,
1390
.disable_tx_interrupt = it87_disable_tx_interrupt,
1391
.get_tx_used_slots = it87_get_tx_used_slots,
1392
.put_tx_byte = it87_put_tx_byte,
1393
.disable = it87_disable,
1394
.init_hardware = it87_init_hardware,
1395
.set_carrier_params = it87_set_carrier_params,
1398
.model = "ITE8708 CIR transceiver",
1399
.io_region_size = IT8708_IOREG_LENGTH,
1401
.hw_tx_capable = true,
1402
.sample_period = (u32) (1000000000ULL / 115200),
1403
.tx_carrier_freq = 38000,
1404
.tx_duty_cycle = 33,
1405
.rx_low_carrier_freq = 0,
1406
.rx_high_carrier_freq = 0,
1409
.get_irq_causes = it8708_get_irq_causes,
1410
.enable_rx = it8708_enable_rx,
1411
.idle_rx = it8708_idle_rx,
1412
.disable_rx = it8708_idle_rx,
1413
.get_rx_bytes = it8708_get_rx_bytes,
1414
.enable_tx_interrupt = it8708_enable_tx_interrupt,
1415
.disable_tx_interrupt =
1416
it8708_disable_tx_interrupt,
1417
.get_tx_used_slots = it8708_get_tx_used_slots,
1418
.put_tx_byte = it8708_put_tx_byte,
1419
.disable = it8708_disable,
1420
.init_hardware = it8708_init_hardware,
1421
.set_carrier_params = it8708_set_carrier_params,
1424
.model = "ITE8709 CIR transceiver",
1425
.io_region_size = IT8709_IOREG_LENGTH,
1427
.hw_tx_capable = true,
1428
.sample_period = (u32) (1000000000ULL / 115200),
1429
.tx_carrier_freq = 38000,
1430
.tx_duty_cycle = 33,
1431
.rx_low_carrier_freq = 0,
1432
.rx_high_carrier_freq = 0,
1435
.get_irq_causes = it8709_get_irq_causes,
1436
.enable_rx = it8709_enable_rx,
1437
.idle_rx = it8709_idle_rx,
1438
.disable_rx = it8709_idle_rx,
1439
.get_rx_bytes = it8709_get_rx_bytes,
1440
.enable_tx_interrupt = it8709_enable_tx_interrupt,
1441
.disable_tx_interrupt =
1442
it8709_disable_tx_interrupt,
1443
.get_tx_used_slots = it8709_get_tx_used_slots,
1444
.put_tx_byte = it8709_put_tx_byte,
1445
.disable = it8709_disable,
1446
.init_hardware = it8709_init_hardware,
1447
.set_carrier_params = it8709_set_carrier_params,
1451
static const struct pnp_device_id ite_ids[] = {
1452
{"ITE8704", 0}, /* Default model */
1453
{"ITE8713", 1}, /* CIR found in EEEBox 1501U */
1454
{"ITE8708", 2}, /* Bridged IT8512 */
1455
{"ITE8709", 3}, /* SRAM-Bridged IT8512 */
1459
/* allocate memory, probe hardware, and initialize everything */
1460
static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id
1463
const struct ite_dev_params *dev_desc = NULL;
1464
struct ite_dev *itdev = NULL;
1465
struct rc_dev *rdev = NULL;
1470
ite_dbg("%s called", __func__);
1472
itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL);
1476
/* input device for IR remote (and tx) */
1477
rdev = rc_allocate_device();
1483
/* get the model number */
1484
model_no = (int)dev_id->driver_data;
1485
ite_pr(KERN_NOTICE, "Auto-detected model: %s\n",
1486
ite_dev_descs[model_no].model);
1488
if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) {
1489
model_no = model_number;
1490
ite_pr(KERN_NOTICE, "The model has been fixed by a module "
1494
ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model);
1496
/* get the description for the device */
1497
dev_desc = &ite_dev_descs[model_no];
1498
io_rsrc_no = dev_desc->io_rsrc_no;
1500
/* validate pnp resources */
1501
if (!pnp_port_valid(pdev, io_rsrc_no) ||
1502
pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) {
1503
dev_err(&pdev->dev, "IR PNP Port not valid!\n");
1507
if (!pnp_irq_valid(pdev, 0)) {
1508
dev_err(&pdev->dev, "PNP IRQ not valid!\n");
1512
/* store resource values */
1513
itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no);
1514
itdev->cir_irq = pnp_irq(pdev, 0);
1516
/* initialize spinlocks */
1517
spin_lock_init(&itdev->lock);
1519
/* initialize raw event */
1520
init_ir_raw_event(&itdev->rawir);
1523
/* now claim resources */
1524
if (!request_region(itdev->cir_addr,
1525
dev_desc->io_region_size, ITE_DRIVER_NAME))
1528
if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
1529
ITE_DRIVER_NAME, (void *)itdev))
1532
/* set driver data into the pnp device */
1533
pnp_set_drvdata(pdev, itdev);
1536
/* initialize waitqueues for transmission */
1537
init_waitqueue_head(&itdev->tx_queue);
1538
init_waitqueue_head(&itdev->tx_ended);
1540
/* copy model-specific parameters */
1541
itdev->params = *dev_desc;
1543
/* apply any overrides */
1544
if (sample_period > 0)
1545
itdev->params.sample_period = sample_period;
1547
if (tx_carrier_freq > 0)
1548
itdev->params.tx_carrier_freq = tx_carrier_freq;
1550
if (tx_duty_cycle > 0 && tx_duty_cycle <= 100)
1551
itdev->params.tx_duty_cycle = tx_duty_cycle;
1553
if (rx_low_carrier_freq > 0)
1554
itdev->params.rx_low_carrier_freq = rx_low_carrier_freq;
1556
if (rx_high_carrier_freq > 0)
1557
itdev->params.rx_high_carrier_freq = rx_high_carrier_freq;
1559
/* print out parameters */
1560
ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int)
1561
itdev->params.hw_tx_capable);
1562
ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long)
1563
itdev->params.sample_period);
1564
ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int)
1565
itdev->params.tx_carrier_freq);
1566
ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int)
1567
itdev->params.tx_duty_cycle);
1568
ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int)
1569
itdev->params.rx_low_carrier_freq);
1570
ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int)
1571
itdev->params.rx_high_carrier_freq);
1573
/* set up hardware initial state */
1574
itdev->params.init_hardware(itdev);
1576
/* set up ir-core props */
1578
rdev->driver_type = RC_DRIVER_IR_RAW;
1579
rdev->allowed_protos = RC_TYPE_ALL;
1580
rdev->open = ite_open;
1581
rdev->close = ite_close;
1582
rdev->s_idle = ite_s_idle;
1583
rdev->s_rx_carrier_range = ite_set_rx_carrier_range;
1584
rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT;
1585
rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT;
1586
rdev->timeout = ITE_IDLE_TIMEOUT;
1587
rdev->rx_resolution = ITE_BAUDRATE_DIVISOR *
1588
itdev->params.sample_period;
1589
rdev->tx_resolution = ITE_BAUDRATE_DIVISOR *
1590
itdev->params.sample_period;
1592
/* set up transmitter related values if needed */
1593
if (itdev->params.hw_tx_capable) {
1594
rdev->tx_ir = ite_tx_ir;
1595
rdev->s_tx_carrier = ite_set_tx_carrier;
1596
rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle;
1599
rdev->input_name = dev_desc->model;
1600
rdev->input_id.bustype = BUS_HOST;
1601
rdev->input_id.vendor = PCI_VENDOR_ID_ITE;
1602
rdev->input_id.product = 0;
1603
rdev->input_id.version = 0;
1604
rdev->driver_name = ITE_DRIVER_NAME;
1605
rdev->map_name = RC_MAP_RC6_MCE;
1607
ret = rc_register_device(rdev);
1612
ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
1618
free_irq(itdev->cir_irq, itdev);
1620
if (itdev->cir_addr)
1621
release_region(itdev->cir_addr, itdev->params.io_region_size);
1623
rc_free_device(rdev);
1629
static void __devexit ite_remove(struct pnp_dev *pdev)
1631
struct ite_dev *dev = pnp_get_drvdata(pdev);
1632
unsigned long flags;
1634
ite_dbg("%s called", __func__);
1636
spin_lock_irqsave(&dev->lock, flags);
1638
/* disable hardware */
1639
dev->params.disable(dev);
1641
spin_unlock_irqrestore(&dev->lock, flags);
1643
/* free resources */
1644
free_irq(dev->cir_irq, dev);
1645
release_region(dev->cir_addr, dev->params.io_region_size);
1647
rc_unregister_device(dev->rdev);
1652
static int ite_suspend(struct pnp_dev *pdev, pm_message_t state)
1654
struct ite_dev *dev = pnp_get_drvdata(pdev);
1655
unsigned long flags;
1657
ite_dbg("%s called", __func__);
1659
/* wait for any transmission to end */
1660
wait_event_interruptible(dev->tx_ended, !dev->transmitting);
1662
spin_lock_irqsave(&dev->lock, flags);
1664
/* disable all interrupts */
1665
dev->params.disable(dev);
1667
spin_unlock_irqrestore(&dev->lock, flags);
1672
static int ite_resume(struct pnp_dev *pdev)
1675
struct ite_dev *dev = pnp_get_drvdata(pdev);
1676
unsigned long flags;
1678
ite_dbg("%s called", __func__);
1680
spin_lock_irqsave(&dev->lock, flags);
1682
/* reinitialize hardware config registers */
1683
dev->params.init_hardware(dev);
1684
/* enable the receiver */
1685
dev->params.enable_rx(dev);
1687
spin_unlock_irqrestore(&dev->lock, flags);
1692
static void ite_shutdown(struct pnp_dev *pdev)
1694
struct ite_dev *dev = pnp_get_drvdata(pdev);
1695
unsigned long flags;
1697
ite_dbg("%s called", __func__);
1699
spin_lock_irqsave(&dev->lock, flags);
1701
/* disable all interrupts */
1702
dev->params.disable(dev);
1704
spin_unlock_irqrestore(&dev->lock, flags);
1707
static struct pnp_driver ite_driver = {
1708
.name = ITE_DRIVER_NAME,
1709
.id_table = ite_ids,
1711
.remove = __devexit_p(ite_remove),
1712
.suspend = ite_suspend,
1713
.resume = ite_resume,
1714
.shutdown = ite_shutdown,
1719
return pnp_register_driver(&ite_driver);
1724
pnp_unregister_driver(&ite_driver);
1727
MODULE_DEVICE_TABLE(pnp, ite_ids);
1728
MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
1730
MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
1731
MODULE_LICENSE("GPL");
1733
module_init(ite_init);
1734
module_exit(ite_exit);
added
removed
drivers/media/rc/ite-cir.c
