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
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * 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
26 * <lirc@bartelmus.de>, Andrew Calkin <r_tay@hotmail.com> and James Edwards
27 * <jimbo-lirc@edwardsclan.net>.
29 * 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>
42 #include <linux/bitops.h>
43 #include <media/rc-core.h>
44 #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
);
59 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
);
86 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
)
118 freq
= ITE_LCF_MAX_CARRIER_FREQ
;
120 /* convert to kHz and subtract the base freq */
122 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
;
137 if (freq
> ITE_HCF_MAX_CARRIER_FREQ
)
138 freq
= ITE_HCF_MAX_CARRIER_FREQ
;
140 period_ns
= 1000000000UL / freq
;
141 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)
153 else if (on_ns
< 1080)
162 else if (on_ns
< 7850)
165 else if (on_ns
< 9650)
168 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
;
190 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);
203 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 */
1255 IT85_C0IER
) & ~(IT85_IEC
| IT85_RFOIE
|
1257 IT85_TLDLIE
), IT85_C0IER
);
1259 /* disable the receiver */
1260 it8709_disable_rx(dev
);
1262 /* erase the FIFO */
1263 it8709_wr(dev
, IT85_FIFOCLR
| it8709_rr(dev
, IT85_C0MSTCR
),
1267 /* initialize the hardware */
1268 static void it8709_init_hardware(struct ite_dev
*dev
)
1270 ite_dbg("%s called", __func__
);
1272 /* disable all the interrupts */
1275 IT85_C0IER
) & ~(IT85_IEC
| IT85_RFOIE
|
1277 IT85_TLDLIE
), IT85_C0IER
);
1279 /* program the baud rate divisor */
1280 it8709_wr(dev
, ITE_BAUDRATE_DIVISOR
& 0xff, IT85_C0BDLR
);
1281 it8709_wr(dev
, (ITE_BAUDRATE_DIVISOR
>> 8) & 0xff,
1284 /* program the C0MSTCR register defaults */
1285 it8709_wr(dev
, (it8709_rr(dev
, IT85_C0MSTCR
) & ~(IT85_ILSEL
|
1292 | IT85_FIFOTL_DEFAULT
, IT85_C0MSTCR
);
1294 /* program the C0RCR register defaults */
1296 (it8709_rr(dev
, IT85_C0RCR
) &
1297 ~(IT85_RXEN
| IT85_RDWOS
| IT85_RXEND
1298 | IT85_RXACT
| IT85_RXDCR
)) |
1299 ITE_RXDCR_DEFAULT
, IT85_C0RCR
);
1301 /* program the C0TCR register defaults */
1302 it8709_wr(dev
, (it8709_rr(dev
, IT85_C0TCR
)
1303 &~(IT85_TXMPM
| IT85_TXMPW
))
1304 |IT85_TXRLE
| IT85_TXENDF
|
1305 IT85_TXMPM_DEFAULT
|
1306 IT85_TXMPW_DEFAULT
, IT85_C0TCR
);
1308 /* program the carrier parameters */
1309 ite_set_carrier_params(dev
);
1313 /* generic hardware setup/teardown code */
1315 /* activate the device for use */
1316 static int ite_open(struct rc_dev
*rcdev
)
1318 struct ite_dev
*dev
= rcdev
->priv
;
1319 unsigned long flags
;
1321 ite_dbg("%s called", __func__
);
1323 spin_lock_irqsave(&dev
->lock
, flags
);
1326 /* enable the receiver */
1327 dev
->params
.enable_rx(dev
);
1329 spin_unlock_irqrestore(&dev
->lock
, flags
);
1334 /* deactivate the device for use */
1335 static void ite_close(struct rc_dev
*rcdev
)
1337 struct ite_dev
*dev
= rcdev
->priv
;
1338 unsigned long flags
;
1340 ite_dbg("%s called", __func__
);
1342 spin_lock_irqsave(&dev
->lock
, flags
);
1343 dev
->in_use
= false;
1345 /* wait for any transmission to end */
1346 spin_unlock_irqrestore(&dev
->lock
, flags
);
1347 wait_event_interruptible(dev
->tx_ended
, !dev
->transmitting
);
1348 spin_lock_irqsave(&dev
->lock
, flags
);
1350 dev
->params
.disable(dev
);
1352 spin_unlock_irqrestore(&dev
->lock
, flags
);
1355 /* supported models and their parameters */
1356 static const struct ite_dev_params ite_dev_descs
[] = {
1358 .model
= "ITE8704 CIR transceiver",
1359 .io_region_size
= IT87_IOREG_LENGTH
,
1360 .hw_tx_capable
= true,
1361 .sample_period
= (u32
) (1000000000ULL / 115200),
1362 .tx_carrier_freq
= 38000,
1363 .tx_duty_cycle
= 33,
1364 .rx_low_carrier_freq
= 0,
1365 .rx_high_carrier_freq
= 0,
1368 .get_irq_causes
= it87_get_irq_causes
,
1369 .enable_rx
= it87_enable_rx
,
1370 .idle_rx
= it87_idle_rx
,
1371 .disable_rx
= it87_idle_rx
,
1372 .get_rx_bytes
= it87_get_rx_bytes
,
1373 .enable_tx_interrupt
= it87_enable_tx_interrupt
,
1374 .disable_tx_interrupt
= it87_disable_tx_interrupt
,
1375 .get_tx_used_slots
= it87_get_tx_used_slots
,
1376 .put_tx_byte
= it87_put_tx_byte
,
1377 .disable
= it87_disable
,
1378 .init_hardware
= it87_init_hardware
,
1379 .set_carrier_params
= it87_set_carrier_params
,
1382 .model
= "ITE8713 CIR transceiver",
1383 .io_region_size
= IT87_IOREG_LENGTH
,
1384 .hw_tx_capable
= true,
1385 .sample_period
= (u32
) (1000000000ULL / 115200),
1386 .tx_carrier_freq
= 38000,
1387 .tx_duty_cycle
= 33,
1388 .rx_low_carrier_freq
= 0,
1389 .rx_high_carrier_freq
= 0,
1392 .get_irq_causes
= it87_get_irq_causes
,
1393 .enable_rx
= it87_enable_rx
,
1394 .idle_rx
= it87_idle_rx
,
1395 .disable_rx
= it87_idle_rx
,
1396 .get_rx_bytes
= it87_get_rx_bytes
,
1397 .enable_tx_interrupt
= it87_enable_tx_interrupt
,
1398 .disable_tx_interrupt
= it87_disable_tx_interrupt
,
1399 .get_tx_used_slots
= it87_get_tx_used_slots
,
1400 .put_tx_byte
= it87_put_tx_byte
,
1401 .disable
= it87_disable
,
1402 .init_hardware
= it87_init_hardware
,
1403 .set_carrier_params
= it87_set_carrier_params
,
1406 .model
= "ITE8708 CIR transceiver",
1407 .io_region_size
= IT8708_IOREG_LENGTH
,
1408 .hw_tx_capable
= true,
1409 .sample_period
= (u32
) (1000000000ULL / 115200),
1410 .tx_carrier_freq
= 38000,
1411 .tx_duty_cycle
= 33,
1412 .rx_low_carrier_freq
= 0,
1413 .rx_high_carrier_freq
= 0,
1416 .get_irq_causes
= it8708_get_irq_causes
,
1417 .enable_rx
= it8708_enable_rx
,
1418 .idle_rx
= it8708_idle_rx
,
1419 .disable_rx
= it8708_idle_rx
,
1420 .get_rx_bytes
= it8708_get_rx_bytes
,
1421 .enable_tx_interrupt
= it8708_enable_tx_interrupt
,
1422 .disable_tx_interrupt
=
1423 it8708_disable_tx_interrupt
,
1424 .get_tx_used_slots
= it8708_get_tx_used_slots
,
1425 .put_tx_byte
= it8708_put_tx_byte
,
1426 .disable
= it8708_disable
,
1427 .init_hardware
= it8708_init_hardware
,
1428 .set_carrier_params
= it8708_set_carrier_params
,
1431 .model
= "ITE8709 CIR transceiver",
1432 .io_region_size
= IT8709_IOREG_LENGTH
,
1433 .hw_tx_capable
= true,
1434 .sample_period
= (u32
) (1000000000ULL / 115200),
1435 .tx_carrier_freq
= 38000,
1436 .tx_duty_cycle
= 33,
1437 .rx_low_carrier_freq
= 0,
1438 .rx_high_carrier_freq
= 0,
1441 .get_irq_causes
= it8709_get_irq_causes
,
1442 .enable_rx
= it8709_enable_rx
,
1443 .idle_rx
= it8709_idle_rx
,
1444 .disable_rx
= it8709_idle_rx
,
1445 .get_rx_bytes
= it8709_get_rx_bytes
,
1446 .enable_tx_interrupt
= it8709_enable_tx_interrupt
,
1447 .disable_tx_interrupt
=
1448 it8709_disable_tx_interrupt
,
1449 .get_tx_used_slots
= it8709_get_tx_used_slots
,
1450 .put_tx_byte
= it8709_put_tx_byte
,
1451 .disable
= it8709_disable
,
1452 .init_hardware
= it8709_init_hardware
,
1453 .set_carrier_params
= it8709_set_carrier_params
,
1457 static const struct pnp_device_id ite_ids
[] = {
1458 {"ITE8704", 0}, /* Default model */
1459 {"ITE8713", 1}, /* CIR found in EEEBox 1501U */
1460 {"ITE8708", 2}, /* Bridged IT8512 */
1461 {"ITE8709", 3}, /* SRAM-Bridged IT8512 */
1465 /* allocate memory, probe hardware, and initialize everything */
1466 static int ite_probe(struct pnp_dev
*pdev
, const struct pnp_device_id
1469 const struct ite_dev_params
*dev_desc
= NULL
;
1470 struct ite_dev
*itdev
= NULL
;
1471 struct rc_dev
*rdev
= NULL
;
1475 ite_dbg("%s called", __func__
);
1477 itdev
= kzalloc(sizeof(struct ite_dev
), GFP_KERNEL
);
1481 /* input device for IR remote (and tx) */
1482 rdev
= rc_allocate_device();
1488 /* get the model number */
1489 model_no
= (int)dev_id
->driver_data
;
1490 ite_pr(KERN_NOTICE
, "Auto-detected model: %s\n",
1491 ite_dev_descs
[model_no
].model
);
1493 if (model_number
>= 0 && model_number
< ARRAY_SIZE(ite_dev_descs
)) {
1494 model_no
= model_number
;
1495 ite_pr(KERN_NOTICE
, "The model has been fixed by a module "
1499 ite_pr(KERN_NOTICE
, "Using model: %s\n", ite_dev_descs
[model_no
].model
);
1501 /* get the description for the device */
1502 dev_desc
= &ite_dev_descs
[model_no
];
1504 /* validate pnp resources */
1505 if (!pnp_port_valid(pdev
, 0) ||
1506 pnp_port_len(pdev
, 0) != dev_desc
->io_region_size
) {
1507 dev_err(&pdev
->dev
, "IR PNP Port not valid!\n");
1511 if (!pnp_irq_valid(pdev
, 0)) {
1512 dev_err(&pdev
->dev
, "PNP IRQ not valid!\n");
1516 /* store resource values */
1517 itdev
->cir_addr
= pnp_port_start(pdev
, 0);
1518 itdev
->cir_irq
= pnp_irq(pdev
, 0);
1520 /* initialize spinlocks */
1521 spin_lock_init(&itdev
->lock
);
1523 /* initialize raw event */
1524 init_ir_raw_event(&itdev
->rawir
);
1527 /* now claim resources */
1528 if (!request_region(itdev
->cir_addr
,
1529 dev_desc
->io_region_size
, ITE_DRIVER_NAME
))
1532 if (request_irq(itdev
->cir_irq
, ite_cir_isr
, IRQF_SHARED
,
1533 ITE_DRIVER_NAME
, (void *)itdev
))
1536 /* set driver data into the pnp device */
1537 pnp_set_drvdata(pdev
, itdev
);
1540 /* initialize waitqueues for transmission */
1541 init_waitqueue_head(&itdev
->tx_queue
);
1542 init_waitqueue_head(&itdev
->tx_ended
);
1544 /* copy model-specific parameters */
1545 itdev
->params
= *dev_desc
;
1547 /* apply any overrides */
1548 if (sample_period
> 0)
1549 itdev
->params
.sample_period
= sample_period
;
1551 if (tx_carrier_freq
> 0)
1552 itdev
->params
.tx_carrier_freq
= tx_carrier_freq
;
1554 if (tx_duty_cycle
> 0 && tx_duty_cycle
<= 100)
1555 itdev
->params
.tx_duty_cycle
= tx_duty_cycle
;
1557 if (rx_low_carrier_freq
> 0)
1558 itdev
->params
.rx_low_carrier_freq
= rx_low_carrier_freq
;
1560 if (rx_high_carrier_freq
> 0)
1561 itdev
->params
.rx_high_carrier_freq
= rx_high_carrier_freq
;
1563 /* print out parameters */
1564 ite_pr(KERN_NOTICE
, "TX-capable: %d\n", (int)
1565 itdev
->params
.hw_tx_capable
);
1566 ite_pr(KERN_NOTICE
, "Sample period (ns): %ld\n", (long)
1567 itdev
->params
.sample_period
);
1568 ite_pr(KERN_NOTICE
, "TX carrier frequency (Hz): %d\n", (int)
1569 itdev
->params
.tx_carrier_freq
);
1570 ite_pr(KERN_NOTICE
, "TX duty cycle (%%): %d\n", (int)
1571 itdev
->params
.tx_duty_cycle
);
1572 ite_pr(KERN_NOTICE
, "RX low carrier frequency (Hz): %d\n", (int)
1573 itdev
->params
.rx_low_carrier_freq
);
1574 ite_pr(KERN_NOTICE
, "RX high carrier frequency (Hz): %d\n", (int)
1575 itdev
->params
.rx_high_carrier_freq
);
1577 /* set up hardware initial state */
1578 itdev
->params
.init_hardware(itdev
);
1580 /* set up ir-core props */
1582 rdev
->driver_type
= RC_DRIVER_IR_RAW
;
1583 rdev
->allowed_protos
= RC_TYPE_ALL
;
1584 rdev
->open
= ite_open
;
1585 rdev
->close
= ite_close
;
1586 rdev
->s_idle
= ite_s_idle
;
1587 rdev
->s_rx_carrier_range
= ite_set_rx_carrier_range
;
1588 rdev
->min_timeout
= ITE_MIN_IDLE_TIMEOUT
;
1589 rdev
->max_timeout
= ITE_MAX_IDLE_TIMEOUT
;
1590 rdev
->timeout
= ITE_IDLE_TIMEOUT
;
1591 rdev
->rx_resolution
= ITE_BAUDRATE_DIVISOR
*
1592 itdev
->params
.sample_period
;
1593 rdev
->tx_resolution
= ITE_BAUDRATE_DIVISOR
*
1594 itdev
->params
.sample_period
;
1596 /* set up transmitter related values if needed */
1597 if (itdev
->params
.hw_tx_capable
) {
1598 rdev
->tx_ir
= ite_tx_ir
;
1599 rdev
->s_tx_carrier
= ite_set_tx_carrier
;
1600 rdev
->s_tx_duty_cycle
= ite_set_tx_duty_cycle
;
1603 rdev
->input_name
= dev_desc
->model
;
1604 rdev
->input_id
.bustype
= BUS_HOST
;
1605 rdev
->input_id
.vendor
= PCI_VENDOR_ID_ITE
;
1606 rdev
->input_id
.product
= 0;
1607 rdev
->input_id
.version
= 0;
1608 rdev
->driver_name
= ITE_DRIVER_NAME
;
1609 rdev
->map_name
= RC_MAP_RC6_MCE
;
1611 ret
= rc_register_device(rdev
);
1616 ite_pr(KERN_NOTICE
, "driver has been successfully loaded\n");
1622 free_irq(itdev
->cir_irq
, itdev
);
1624 if (itdev
->cir_addr
)
1625 release_region(itdev
->cir_addr
, itdev
->params
.io_region_size
);
1627 rc_free_device(rdev
);
1633 static void __devexit
ite_remove(struct pnp_dev
*pdev
)
1635 struct ite_dev
*dev
= pnp_get_drvdata(pdev
);
1636 unsigned long flags
;
1638 ite_dbg("%s called", __func__
);
1640 spin_lock_irqsave(&dev
->lock
, flags
);
1642 /* disable hardware */
1643 dev
->params
.disable(dev
);
1645 spin_unlock_irqrestore(&dev
->lock
, flags
);
1647 /* free resources */
1648 free_irq(dev
->cir_irq
, dev
);
1649 release_region(dev
->cir_addr
, dev
->params
.io_region_size
);
1651 rc_unregister_device(dev
->rdev
);
1656 static int ite_suspend(struct pnp_dev
*pdev
, pm_message_t state
)
1658 struct ite_dev
*dev
= pnp_get_drvdata(pdev
);
1659 unsigned long flags
;
1661 ite_dbg("%s called", __func__
);
1663 spin_lock_irqsave(&dev
->lock
, flags
);
1665 /* disable all interrupts */
1666 dev
->params
.disable(dev
);
1668 spin_unlock_irqrestore(&dev
->lock
, flags
);
1673 static int ite_resume(struct pnp_dev
*pdev
)
1676 struct ite_dev
*dev
= pnp_get_drvdata(pdev
);
1677 unsigned long flags
;
1679 ite_dbg("%s called", __func__
);
1681 spin_lock_irqsave(&dev
->lock
, flags
);
1683 if (dev
->transmitting
) {
1684 /* wake up the transmitter */
1685 wake_up_interruptible(&dev
->tx_queue
);
1687 /* enable the receiver */
1688 dev
->params
.enable_rx(dev
);
1691 spin_unlock_irqrestore(&dev
->lock
, flags
);
1696 static void ite_shutdown(struct pnp_dev
*pdev
)
1698 struct ite_dev
*dev
= pnp_get_drvdata(pdev
);
1699 unsigned long flags
;
1701 ite_dbg("%s called", __func__
);
1703 spin_lock_irqsave(&dev
->lock
, flags
);
1705 /* disable all interrupts */
1706 dev
->params
.disable(dev
);
1708 spin_unlock_irqrestore(&dev
->lock
, flags
);
1711 static struct pnp_driver ite_driver
= {
1712 .name
= ITE_DRIVER_NAME
,
1713 .id_table
= ite_ids
,
1715 .remove
= __devexit_p(ite_remove
),
1716 .suspend
= ite_suspend
,
1717 .resume
= ite_resume
,
1718 .shutdown
= ite_shutdown
,
1723 return pnp_register_driver(&ite_driver
);
1728 pnp_unregister_driver(&ite_driver
);
1731 MODULE_DEVICE_TABLE(pnp
, ite_ids
);
1732 MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
1734 MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
1735 MODULE_LICENSE("GPL");
1737 module_init(ite_init
);
1738 module_exit(ite_exit
);