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[media] rc-core: lirc use unsigned int
[mirror_ubuntu-artful-kernel.git] / drivers / media / rc / ite-cir.c
1 /*
2 * Driver for ITE Tech Inc. IT8712F/IT8512 CIR
3 *
4 * Copyright (C) 2010 Juan Jesús García de Soria <skandalfo@gmail.com>
5 *
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.
10 *
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.
15 *
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
19 * USA.
20 *
21 * Inspired by the original lirc_it87 and lirc_ite8709 drivers, on top of the
22 * skeleton provided by the nuvoton-cir driver.
23 *
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>.
28 *
29 * The lirc_ite8709 driver was written by Grégory Lardière
30 * <spmf2004-lirc@yahoo.fr> in 2008.
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/pnp.h>
36 #include <linux/io.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>
46
47 #include "ite-cir.h"
48
49 /* module parameters */
50
51 /* debug level */
52 static int debug;
53 module_param(debug, int, S_IRUGO | S_IWUSR);
54 MODULE_PARM_DESC(debug, "Enable debugging output");
55
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");
61
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");
67
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");
72
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");
77
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");
82
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");
87
88
89 /* HW-independent code functions */
90
91 /* check whether carrier frequency is high frequency */
92 static inline bool ite_is_high_carrier_freq(unsigned int freq)
93 {
94 return freq >= ITE_HCF_MIN_CARRIER_FREQ;
95 }
96
97 /* get the bits required to program the carrier frequency in CFQ bits,
98 * unshifted */
99 static u8 ite_get_carrier_freq_bits(unsigned int freq)
100 {
101 if (ite_is_high_carrier_freq(freq)) {
102 if (freq < 425000)
103 return ITE_CFQ_400;
104
105 else if (freq < 465000)
106 return ITE_CFQ_450;
107
108 else if (freq < 490000)
109 return ITE_CFQ_480;
110
111 else
112 return ITE_CFQ_500;
113 } else {
114 /* trim to limits */
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;
119
120 /* convert to kHz and subtract the base freq */
121 freq =
122 DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ,
123 1000);
124
125 return (u8) freq;
126 }
127 }
128
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)
131 {
132 unsigned long period_ns, on_ns;
133
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;
139
140 period_ns = 1000000000UL / freq;
141 on_ns = period_ns * duty_cycle / 100;
142
143 if (ite_is_high_carrier_freq(freq)) {
144 if (on_ns < 750)
145 return ITE_TXMPW_A;
146
147 else if (on_ns < 850)
148 return ITE_TXMPW_B;
149
150 else if (on_ns < 950)
151 return ITE_TXMPW_C;
152
153 else if (on_ns < 1080)
154 return ITE_TXMPW_D;
155
156 else
157 return ITE_TXMPW_E;
158 } else {
159 if (on_ns < 6500)
160 return ITE_TXMPW_A;
161
162 else if (on_ns < 7850)
163 return ITE_TXMPW_B;
164
165 else if (on_ns < 9650)
166 return ITE_TXMPW_C;
167
168 else if (on_ns < 11950)
169 return ITE_TXMPW_D;
170
171 else
172 return ITE_TXMPW_E;
173 }
174 }
175
176 /* decode raw bytes as received by the hardware, and push them to the ir-core
177 * layer */
178 static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int
179 length)
180 {
181 u32 sample_period;
182 unsigned long *ldata;
183 unsigned int next_one, next_zero, size;
184 DEFINE_IR_RAW_EVENT(ev);
185
186 if (length == 0)
187 return;
188
189 sample_period = dev->params.sample_period;
190 ldata = (unsigned long *)data;
191 size = length << 3;
192 next_one = find_next_bit_le(ldata, size, 0);
193 if (next_one > 0) {
194 ev.pulse = true;
195 ev.duration =
196 ITE_BITS_TO_NS(next_one, sample_period);
197 ir_raw_event_store_with_filter(dev->rdev, &ev);
198 }
199
200 while (next_one < size) {
201 next_zero = find_next_zero_bit_le(ldata, size, next_one + 1);
202 ev.pulse = false;
203 ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period);
204 ir_raw_event_store_with_filter(dev->rdev, &ev);
205
206 if (next_zero < size) {
207 next_one =
208 find_next_bit_le(ldata,
209 size,
210 next_zero + 1);
211 ev.pulse = true;
212 ev.duration =
213 ITE_BITS_TO_NS(next_one - next_zero,
214 sample_period);
215 ir_raw_event_store_with_filter
216 (dev->rdev, &ev);
217 } else
218 next_one = size;
219 }
220
221 ir_raw_event_handle(dev->rdev);
222
223 ite_dbg_verbose("decoded %d bytes.", length);
224 }
225
226 /* set all the rx/tx carrier parameters; this must be called with the device
227 * spinlock held */
228 static void ite_set_carrier_params(struct ite_dev *dev)
229 {
230 unsigned int freq, low_freq, high_freq;
231 int allowance;
232 bool use_demodulator;
233 bool for_tx = dev->transmitting;
234
235 ite_dbg("%s called", __func__);
236
237 if (for_tx) {
238 /* we don't need no stinking calculations */
239 freq = dev->params.tx_carrier_freq;
240 allowance = ITE_RXDCR_DEFAULT;
241 use_demodulator = false;
242 } else {
243 low_freq = dev->params.rx_low_carrier_freq;
244 high_freq = dev->params.rx_high_carrier_freq;
245
246 if (low_freq == 0) {
247 /* don't demodulate */
248 freq =
249 ITE_DEFAULT_CARRIER_FREQ;
250 allowance = ITE_RXDCR_DEFAULT;
251 use_demodulator = false;
252 } else {
253 /* calculate the middle freq */
254 freq = (low_freq + high_freq) / 2;
255
256 /* calculate the allowance */
257 allowance =
258 DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq),
259 ITE_RXDCR_PER_10000_STEP
260 * (high_freq + low_freq));
261
262 if (allowance < 1)
263 allowance = 1;
264
265 if (allowance > ITE_RXDCR_MAX)
266 allowance = ITE_RXDCR_MAX;
267 }
268 }
269
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));
274 }
275
276 /* interrupt service routine for incoming and outgoing CIR data */
277 static irqreturn_t ite_cir_isr(int irq, void *data)
278 {
279 struct ite_dev *dev = data;
280 unsigned long flags;
281 irqreturn_t ret = IRQ_RETVAL(IRQ_NONE);
282 u8 rx_buf[ITE_RX_FIFO_LEN];
283 int rx_bytes;
284 int iflags;
285
286 ite_dbg_verbose("%s firing", __func__);
287
288 /* grab the spinlock */
289 spin_lock_irqsave(&dev->lock, flags);
290
291 /* read the interrupt flags */
292 iflags = dev->params.get_irq_causes(dev);
293
294 /* check for the receive interrupt */
295 if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
296 /* read the FIFO bytes */
297 rx_bytes =
298 dev->params.get_rx_bytes(dev, rx_buf,
299 ITE_RX_FIFO_LEN);
300
301 if (rx_bytes > 0) {
302 /* drop the spinlock, since the ir-core layer
303 * may call us back again through
304 * ite_s_idle() */
305 spin_unlock_irqrestore(&dev->
306 lock,
307 flags);
308
309 /* decode the data we've just received */
310 ite_decode_bytes(dev, rx_buf,
311 rx_bytes);
312
313 /* reacquire the spinlock */
314 spin_lock_irqsave(&dev->lock,
315 flags);
316
317 /* mark the interrupt as serviced */
318 ret = IRQ_RETVAL(IRQ_HANDLED);
319 }
320 } else if (iflags & ITE_IRQ_TX_FIFO) {
321 /* FIFO space available interrupt */
322 ite_dbg_verbose("got interrupt for TX FIFO");
323
324 /* wake any sleeping transmitter */
325 wake_up_interruptible(&dev->tx_queue);
326
327 /* mark the interrupt as serviced */
328 ret = IRQ_RETVAL(IRQ_HANDLED);
329 }
330
331 /* drop the spinlock */
332 spin_unlock_irqrestore(&dev->lock, flags);
333
334 ite_dbg_verbose("%s done returning %d", __func__, (int)ret);
335
336 return ret;
337 }
338
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
341 carrier_high)
342 {
343 unsigned long flags;
344 struct ite_dev *dev = rcdev->priv;
345
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);
351
352 return 0;
353 }
354
355 /* set the tx carrier freq, guess it's in Hz... */
356 static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
357 {
358 unsigned long flags;
359 struct ite_dev *dev = rcdev->priv;
360
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);
365
366 return 0;
367 }
368
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)
371 {
372 unsigned long flags;
373 struct ite_dev *dev = rcdev->priv;
374
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);
379
380 return 0;
381 }
382
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, unsigned *txbuf, unsigned n)
387 {
388 unsigned long flags;
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;
393 int ret = n;
394 u8 last_sent[ITE_TX_FIFO_LEN];
395 u8 val;
396
397 ite_dbg("%s called", __func__);
398
399 /* clear the array just in case */
400 memset(last_sent, 0, ARRAY_SIZE(last_sent));
401
402 spin_lock_irqsave(&dev->lock, flags);
403
404 /* let everybody know we're now transmitting */
405 dev->transmitting = true;
406
407 /* and set the carrier values for transmission */
408 ite_set_carrier_params(dev);
409
410 /* calculate how much time we can send in one byte */
411 max_rle_us =
412 (ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
413 ITE_TX_MAX_RLE) / 1000;
414
415 /* disable the receiver */
416 dev->params.disable_rx(dev);
417
418 /* this is where we'll begin filling in the FIFO, until it's full.
419 * then we'll just activate the interrupt, wait for it to wake us up
420 * again, disable it, continue filling the FIFO... until everything
421 * has been pushed out */
422 fifo_avail =
423 ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
424
425 while (n > 0 && dev->in_use) {
426 /* transmit the next sample */
427 is_pulse = !is_pulse;
428 remaining_us = *(txbuf++);
429 n--;
430
431 ite_dbg("%s: %ld",
432 ((is_pulse) ? "pulse" : "space"),
433 (long int)
434 remaining_us);
435
436 /* repeat while the pulse is non-zero length */
437 while (remaining_us > 0 && dev->in_use) {
438 if (remaining_us > max_rle_us)
439 next_rle_us = max_rle_us;
440
441 else
442 next_rle_us = remaining_us;
443
444 remaining_us -= next_rle_us;
445
446 /* check what's the length we have to pump out */
447 val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
448
449 /* put it into the sent buffer */
450 last_sent[last_idx++] = val;
451 last_idx &= (ITE_TX_FIFO_LEN);
452
453 /* encode it for 7 bits */
454 val = (val - 1) & ITE_TX_RLE_MASK;
455
456 /* take into account pulse/space prefix */
457 if (is_pulse)
458 val |= ITE_TX_PULSE;
459
460 else
461 val |= ITE_TX_SPACE;
462
463 /*
464 * if we get to 0 available, read again, just in case
465 * some other slot got freed
466 */
467 if (fifo_avail <= 0)
468 fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
469
470 /* if it's still full */
471 if (fifo_avail <= 0) {
472 /* enable the tx interrupt */
473 dev->params.
474 enable_tx_interrupt(dev);
475
476 /* drop the spinlock */
477 spin_unlock_irqrestore(&dev->lock, flags);
478
479 /* wait for the FIFO to empty enough */
480 wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
481
482 /* get the spinlock again */
483 spin_lock_irqsave(&dev->lock, flags);
484
485 /* disable the tx interrupt again. */
486 dev->params.
487 disable_tx_interrupt(dev);
488 }
489
490 /* now send the byte through the FIFO */
491 dev->params.put_tx_byte(dev, val);
492 fifo_avail--;
493 }
494 }
495
496 /* wait and don't return until the whole FIFO has been sent out;
497 * otherwise we could configure the RX carrier params instead of the
498 * TX ones while the transmission is still being performed! */
499 fifo_remaining = dev->params.get_tx_used_slots(dev);
500 remaining_us = 0;
501 while (fifo_remaining > 0) {
502 fifo_remaining--;
503 last_idx--;
504 last_idx &= (ITE_TX_FIFO_LEN - 1);
505 remaining_us += last_sent[last_idx];
506 }
507 remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE);
508
509 /* drop the spinlock while we sleep */
510 spin_unlock_irqrestore(&dev->lock, flags);
511
512 /* sleep remaining_us microseconds */
513 mdelay(DIV_ROUND_UP(remaining_us, 1000));
514
515 /* reacquire the spinlock */
516 spin_lock_irqsave(&dev->lock, flags);
517
518 /* now we're not transmitting anymore */
519 dev->transmitting = false;
520
521 /* and set the carrier values for reception */
522 ite_set_carrier_params(dev);
523
524 /* reenable the receiver */
525 if (dev->in_use)
526 dev->params.enable_rx(dev);
527
528 /* notify transmission end */
529 wake_up_interruptible(&dev->tx_ended);
530
531 spin_unlock_irqrestore(&dev->lock, flags);
532
533 return ret;
534 }
535
536 /* idle the receiver if needed */
537 static void ite_s_idle(struct rc_dev *rcdev, bool enable)
538 {
539 unsigned long flags;
540 struct ite_dev *dev = rcdev->priv;
541
542 ite_dbg("%s called", __func__);
543
544 if (enable) {
545 spin_lock_irqsave(&dev->lock, flags);
546 dev->params.idle_rx(dev);
547 spin_unlock_irqrestore(&dev->lock, flags);
548 }
549 }
550
551
552 /* IT8712F HW-specific functions */
553
554 /* retrieve a bitmask of the current causes for a pending interrupt; this may
555 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
556 * */
557 static int it87_get_irq_causes(struct ite_dev *dev)
558 {
559 u8 iflags;
560 int ret = 0;
561
562 ite_dbg("%s called", __func__);
563
564 /* read the interrupt flags */
565 iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II;
566
567 switch (iflags) {
568 case IT87_II_RXDS:
569 ret = ITE_IRQ_RX_FIFO;
570 break;
571 case IT87_II_RXFO:
572 ret = ITE_IRQ_RX_FIFO_OVERRUN;
573 break;
574 case IT87_II_TXLDL:
575 ret = ITE_IRQ_TX_FIFO;
576 break;
577 }
578
579 return ret;
580 }
581
582 /* set the carrier parameters; to be called with the spinlock held */
583 static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq,
584 bool use_demodulator,
585 u8 carrier_freq_bits, u8 allowance_bits,
586 u8 pulse_width_bits)
587 {
588 u8 val;
589
590 ite_dbg("%s called", __func__);
591
592 /* program the RCR register */
593 val = inb(dev->cir_addr + IT87_RCR)
594 & ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR);
595
596 if (high_freq)
597 val |= IT87_HCFS;
598
599 if (use_demodulator)
600 val |= IT87_RXEND;
601
602 val |= allowance_bits;
603
604 outb(val, dev->cir_addr + IT87_RCR);
605
606 /* program the TCR2 register */
607 outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits,
608 dev->cir_addr + IT87_TCR2);
609 }
610
611 /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
612 * held */
613 static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
614 {
615 int fifo, read = 0;
616
617 ite_dbg("%s called", __func__);
618
619 /* read how many bytes are still in the FIFO */
620 fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC;
621
622 while (fifo > 0 && buf_size > 0) {
623 *(buf++) = inb(dev->cir_addr + IT87_DR);
624 fifo--;
625 read++;
626 buf_size--;
627 }
628
629 return read;
630 }
631
632 /* return how many bytes are still in the FIFO; this will be called
633 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
634 * empty; let's expect this won't be a problem */
635 static int it87_get_tx_used_slots(struct ite_dev *dev)
636 {
637 ite_dbg("%s called", __func__);
638
639 return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC;
640 }
641
642 /* put a byte to the TX fifo; this should be called with the spinlock held */
643 static void it87_put_tx_byte(struct ite_dev *dev, u8 value)
644 {
645 outb(value, dev->cir_addr + IT87_DR);
646 }
647
648 /* idle the receiver so that we won't receive samples until another
649 pulse is detected; this must be called with the device spinlock held */
650 static void it87_idle_rx(struct ite_dev *dev)
651 {
652 ite_dbg("%s called", __func__);
653
654 /* disable streaming by clearing RXACT writing it as 1 */
655 outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT,
656 dev->cir_addr + IT87_RCR);
657
658 /* clear the FIFO */
659 outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR,
660 dev->cir_addr + IT87_TCR1);
661 }
662
663 /* disable the receiver; this must be called with the device spinlock held */
664 static void it87_disable_rx(struct ite_dev *dev)
665 {
666 ite_dbg("%s called", __func__);
667
668 /* disable the receiver interrupts */
669 outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE),
670 dev->cir_addr + IT87_IER);
671
672 /* disable the receiver */
673 outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN,
674 dev->cir_addr + IT87_RCR);
675
676 /* clear the FIFO and RXACT (actually RXACT should have been cleared
677 * in the previous outb() call) */
678 it87_idle_rx(dev);
679 }
680
681 /* enable the receiver; this must be called with the device spinlock held */
682 static void it87_enable_rx(struct ite_dev *dev)
683 {
684 ite_dbg("%s called", __func__);
685
686 /* enable the receiver by setting RXEN */
687 outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN,
688 dev->cir_addr + IT87_RCR);
689
690 /* just prepare it to idle for the next reception */
691 it87_idle_rx(dev);
692
693 /* enable the receiver interrupts and master enable flag */
694 outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC,
695 dev->cir_addr + IT87_IER);
696 }
697
698 /* disable the transmitter interrupt; this must be called with the device
699 * spinlock held */
700 static void it87_disable_tx_interrupt(struct ite_dev *dev)
701 {
702 ite_dbg("%s called", __func__);
703
704 /* disable the transmitter interrupts */
705 outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE,
706 dev->cir_addr + IT87_IER);
707 }
708
709 /* enable the transmitter interrupt; this must be called with the device
710 * spinlock held */
711 static void it87_enable_tx_interrupt(struct ite_dev *dev)
712 {
713 ite_dbg("%s called", __func__);
714
715 /* enable the transmitter interrupts and master enable flag */
716 outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC,
717 dev->cir_addr + IT87_IER);
718 }
719
720 /* disable the device; this must be called with the device spinlock held */
721 static void it87_disable(struct ite_dev *dev)
722 {
723 ite_dbg("%s called", __func__);
724
725 /* clear out all interrupt enable flags */
726 outb(inb(dev->cir_addr + IT87_IER) &
727 ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE),
728 dev->cir_addr + IT87_IER);
729
730 /* disable the receiver */
731 it87_disable_rx(dev);
732
733 /* erase the FIFO */
734 outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1),
735 dev->cir_addr + IT87_TCR1);
736 }
737
738 /* initialize the hardware */
739 static void it87_init_hardware(struct ite_dev *dev)
740 {
741 ite_dbg("%s called", __func__);
742
743 /* enable just the baud rate divisor register,
744 disabling all the interrupts at the same time */
745 outb((inb(dev->cir_addr + IT87_IER) &
746 ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR,
747 dev->cir_addr + IT87_IER);
748
749 /* write out the baud rate divisor */
750 outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR);
751 outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR);
752
753 /* disable the baud rate divisor register again */
754 outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR,
755 dev->cir_addr + IT87_IER);
756
757 /* program the RCR register defaults */
758 outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR);
759
760 /* program the TCR1 register */
761 outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE
762 | IT87_FIFOTL_DEFAULT | IT87_FIFOCLR,
763 dev->cir_addr + IT87_TCR1);
764
765 /* program the carrier parameters */
766 ite_set_carrier_params(dev);
767 }
768
769 /* IT8512F on ITE8708 HW-specific functions */
770
771 /* retrieve a bitmask of the current causes for a pending interrupt; this may
772 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
773 * */
774 static int it8708_get_irq_causes(struct ite_dev *dev)
775 {
776 u8 iflags;
777 int ret = 0;
778
779 ite_dbg("%s called", __func__);
780
781 /* read the interrupt flags */
782 iflags = inb(dev->cir_addr + IT8708_C0IIR);
783
784 if (iflags & IT85_TLDLI)
785 ret |= ITE_IRQ_TX_FIFO;
786 if (iflags & IT85_RDAI)
787 ret |= ITE_IRQ_RX_FIFO;
788 if (iflags & IT85_RFOI)
789 ret |= ITE_IRQ_RX_FIFO_OVERRUN;
790
791 return ret;
792 }
793
794 /* set the carrier parameters; to be called with the spinlock held */
795 static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq,
796 bool use_demodulator,
797 u8 carrier_freq_bits, u8 allowance_bits,
798 u8 pulse_width_bits)
799 {
800 u8 val;
801
802 ite_dbg("%s called", __func__);
803
804 /* program the C0CFR register, with HRAE=1 */
805 outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
806 dev->cir_addr + IT8708_BANKSEL);
807
808 val = (inb(dev->cir_addr + IT8708_C0CFR)
809 & ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits;
810
811 if (high_freq)
812 val |= IT85_HCFS;
813
814 outb(val, dev->cir_addr + IT8708_C0CFR);
815
816 outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
817 dev->cir_addr + IT8708_BANKSEL);
818
819 /* program the C0RCR register */
820 val = inb(dev->cir_addr + IT8708_C0RCR)
821 & ~(IT85_RXEND | IT85_RXDCR);
822
823 if (use_demodulator)
824 val |= IT85_RXEND;
825
826 val |= allowance_bits;
827
828 outb(val, dev->cir_addr + IT8708_C0RCR);
829
830 /* program the C0TCR register */
831 val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW;
832 val |= pulse_width_bits;
833 outb(val, dev->cir_addr + IT8708_C0TCR);
834 }
835
836 /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
837 * held */
838 static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
839 {
840 int fifo, read = 0;
841
842 ite_dbg("%s called", __func__);
843
844 /* read how many bytes are still in the FIFO */
845 fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC;
846
847 while (fifo > 0 && buf_size > 0) {
848 *(buf++) = inb(dev->cir_addr + IT8708_C0DR);
849 fifo--;
850 read++;
851 buf_size--;
852 }
853
854 return read;
855 }
856
857 /* return how many bytes are still in the FIFO; this will be called
858 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
859 * empty; let's expect this won't be a problem */
860 static int it8708_get_tx_used_slots(struct ite_dev *dev)
861 {
862 ite_dbg("%s called", __func__);
863
864 return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC;
865 }
866
867 /* put a byte to the TX fifo; this should be called with the spinlock held */
868 static void it8708_put_tx_byte(struct ite_dev *dev, u8 value)
869 {
870 outb(value, dev->cir_addr + IT8708_C0DR);
871 }
872
873 /* idle the receiver so that we won't receive samples until another
874 pulse is detected; this must be called with the device spinlock held */
875 static void it8708_idle_rx(struct ite_dev *dev)
876 {
877 ite_dbg("%s called", __func__);
878
879 /* disable streaming by clearing RXACT writing it as 1 */
880 outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT,
881 dev->cir_addr + IT8708_C0RCR);
882
883 /* clear the FIFO */
884 outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR,
885 dev->cir_addr + IT8708_C0MSTCR);
886 }
887
888 /* disable the receiver; this must be called with the device spinlock held */
889 static void it8708_disable_rx(struct ite_dev *dev)
890 {
891 ite_dbg("%s called", __func__);
892
893 /* disable the receiver interrupts */
894 outb(inb(dev->cir_addr + IT8708_C0IER) &
895 ~(IT85_RDAIE | IT85_RFOIE),
896 dev->cir_addr + IT8708_C0IER);
897
898 /* disable the receiver */
899 outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN,
900 dev->cir_addr + IT8708_C0RCR);
901
902 /* clear the FIFO and RXACT (actually RXACT should have been cleared
903 * in the previous outb() call) */
904 it8708_idle_rx(dev);
905 }
906
907 /* enable the receiver; this must be called with the device spinlock held */
908 static void it8708_enable_rx(struct ite_dev *dev)
909 {
910 ite_dbg("%s called", __func__);
911
912 /* enable the receiver by setting RXEN */
913 outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN,
914 dev->cir_addr + IT8708_C0RCR);
915
916 /* just prepare it to idle for the next reception */
917 it8708_idle_rx(dev);
918
919 /* enable the receiver interrupts and master enable flag */
920 outb(inb(dev->cir_addr + IT8708_C0IER)
921 |IT85_RDAIE | IT85_RFOIE | IT85_IEC,
922 dev->cir_addr + IT8708_C0IER);
923 }
924
925 /* disable the transmitter interrupt; this must be called with the device
926 * spinlock held */
927 static void it8708_disable_tx_interrupt(struct ite_dev *dev)
928 {
929 ite_dbg("%s called", __func__);
930
931 /* disable the transmitter interrupts */
932 outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE,
933 dev->cir_addr + IT8708_C0IER);
934 }
935
936 /* enable the transmitter interrupt; this must be called with the device
937 * spinlock held */
938 static void it8708_enable_tx_interrupt(struct ite_dev *dev)
939 {
940 ite_dbg("%s called", __func__);
941
942 /* enable the transmitter interrupts and master enable flag */
943 outb(inb(dev->cir_addr + IT8708_C0IER)
944 |IT85_TLDLIE | IT85_IEC,
945 dev->cir_addr + IT8708_C0IER);
946 }
947
948 /* disable the device; this must be called with the device spinlock held */
949 static void it8708_disable(struct ite_dev *dev)
950 {
951 ite_dbg("%s called", __func__);
952
953 /* clear out all interrupt enable flags */
954 outb(inb(dev->cir_addr + IT8708_C0IER) &
955 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
956 dev->cir_addr + IT8708_C0IER);
957
958 /* disable the receiver */
959 it8708_disable_rx(dev);
960
961 /* erase the FIFO */
962 outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR),
963 dev->cir_addr + IT8708_C0MSTCR);
964 }
965
966 /* initialize the hardware */
967 static void it8708_init_hardware(struct ite_dev *dev)
968 {
969 ite_dbg("%s called", __func__);
970
971 /* disable all the interrupts */
972 outb(inb(dev->cir_addr + IT8708_C0IER) &
973 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
974 dev->cir_addr + IT8708_C0IER);
975
976 /* program the baud rate divisor */
977 outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
978 dev->cir_addr + IT8708_BANKSEL);
979
980 outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR);
981 outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
982 dev->cir_addr + IT8708_C0BDHR);
983
984 outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
985 dev->cir_addr + IT8708_BANKSEL);
986
987 /* program the C0MSTCR register defaults */
988 outb((inb(dev->cir_addr + IT8708_C0MSTCR) &
989 ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
990 IT85_FIFOCLR | IT85_RESET)) |
991 IT85_FIFOTL_DEFAULT,
992 dev->cir_addr + IT8708_C0MSTCR);
993
994 /* program the C0RCR register defaults */
995 outb((inb(dev->cir_addr + IT8708_C0RCR) &
996 ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND |
997 IT85_RXACT | IT85_RXDCR)) |
998 ITE_RXDCR_DEFAULT,
999 dev->cir_addr + IT8708_C0RCR);
1000
1001 /* program the C0TCR register defaults */
1002 outb((inb(dev->cir_addr + IT8708_C0TCR) &
1003 ~(IT85_TXMPM | IT85_TXMPW))
1004 |IT85_TXRLE | IT85_TXENDF |
1005 IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT,
1006 dev->cir_addr + IT8708_C0TCR);
1007
1008 /* program the carrier parameters */
1009 ite_set_carrier_params(dev);
1010 }
1011
1012 /* IT8512F on ITE8709 HW-specific functions */
1013
1014 /* read a byte from the SRAM module */
1015 static inline u8 it8709_rm(struct ite_dev *dev, int index)
1016 {
1017 outb(index, dev->cir_addr + IT8709_RAM_IDX);
1018 return inb(dev->cir_addr + IT8709_RAM_VAL);
1019 }
1020
1021 /* write a byte to the SRAM module */
1022 static inline void it8709_wm(struct ite_dev *dev, u8 val, int index)
1023 {
1024 outb(index, dev->cir_addr + IT8709_RAM_IDX);
1025 outb(val, dev->cir_addr + IT8709_RAM_VAL);
1026 }
1027
1028 static void it8709_wait(struct ite_dev *dev)
1029 {
1030 int i = 0;
1031 /*
1032 * loop until device tells it's ready to continue
1033 * iterations count is usually ~750 but can sometimes achieve 13000
1034 */
1035 for (i = 0; i < 15000; i++) {
1036 udelay(2);
1037 if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE)
1038 break;
1039 }
1040 }
1041
1042 /* read the value of a CIR register */
1043 static u8 it8709_rr(struct ite_dev *dev, int index)
1044 {
1045 /* just wait in case the previous access was a write */
1046 it8709_wait(dev);
1047 it8709_wm(dev, index, IT8709_REG_IDX);
1048 it8709_wm(dev, IT8709_READ, IT8709_MODE);
1049
1050 /* wait for the read data to be available */
1051 it8709_wait(dev);
1052
1053 /* return the read value */
1054 return it8709_rm(dev, IT8709_REG_VAL);
1055 }
1056
1057 /* write the value of a CIR register */
1058 static void it8709_wr(struct ite_dev *dev, u8 val, int index)
1059 {
1060 /* we wait before writing, and not afterwards, since this allows us to
1061 * pipeline the host CPU with the microcontroller */
1062 it8709_wait(dev);
1063 it8709_wm(dev, val, IT8709_REG_VAL);
1064 it8709_wm(dev, index, IT8709_REG_IDX);
1065 it8709_wm(dev, IT8709_WRITE, IT8709_MODE);
1066 }
1067
1068 /* retrieve a bitmask of the current causes for a pending interrupt; this may
1069 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
1070 * */
1071 static int it8709_get_irq_causes(struct ite_dev *dev)
1072 {
1073 u8 iflags;
1074 int ret = 0;
1075
1076 ite_dbg("%s called", __func__);
1077
1078 /* read the interrupt flags */
1079 iflags = it8709_rm(dev, IT8709_IIR);
1080
1081 if (iflags & IT85_TLDLI)
1082 ret |= ITE_IRQ_TX_FIFO;
1083 if (iflags & IT85_RDAI)
1084 ret |= ITE_IRQ_RX_FIFO;
1085 if (iflags & IT85_RFOI)
1086 ret |= ITE_IRQ_RX_FIFO_OVERRUN;
1087
1088 return ret;
1089 }
1090
1091 /* set the carrier parameters; to be called with the spinlock held */
1092 static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
1093 bool use_demodulator,
1094 u8 carrier_freq_bits, u8 allowance_bits,
1095 u8 pulse_width_bits)
1096 {
1097 u8 val;
1098
1099 ite_dbg("%s called", __func__);
1100
1101 val = (it8709_rr(dev, IT85_C0CFR)
1102 &~(IT85_HCFS | IT85_CFQ)) |
1103 carrier_freq_bits;
1104
1105 if (high_freq)
1106 val |= IT85_HCFS;
1107
1108 it8709_wr(dev, val, IT85_C0CFR);
1109
1110 /* program the C0RCR register */
1111 val = it8709_rr(dev, IT85_C0RCR)
1112 & ~(IT85_RXEND | IT85_RXDCR);
1113
1114 if (use_demodulator)
1115 val |= IT85_RXEND;
1116
1117 val |= allowance_bits;
1118
1119 it8709_wr(dev, val, IT85_C0RCR);
1120
1121 /* program the C0TCR register */
1122 val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
1123 val |= pulse_width_bits;
1124 it8709_wr(dev, val, IT85_C0TCR);
1125 }
1126
1127 /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
1128 * held */
1129 static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
1130 {
1131 int fifo, read = 0;
1132
1133 ite_dbg("%s called", __func__);
1134
1135 /* read how many bytes are still in the FIFO */
1136 fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC;
1137
1138 while (fifo > 0 && buf_size > 0) {
1139 *(buf++) = it8709_rm(dev, IT8709_FIFO + read);
1140 fifo--;
1141 read++;
1142 buf_size--;
1143 }
1144
1145 /* 'clear' the FIFO by setting the writing index to 0; this is
1146 * completely bound to be racy, but we can't help it, since it's a
1147 * limitation of the protocol */
1148 it8709_wm(dev, 0, IT8709_RFSR);
1149
1150 return read;
1151 }
1152
1153 /* return how many bytes are still in the FIFO; this will be called
1154 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
1155 * empty; let's expect this won't be a problem */
1156 static int it8709_get_tx_used_slots(struct ite_dev *dev)
1157 {
1158 ite_dbg("%s called", __func__);
1159
1160 return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
1161 }
1162
1163 /* put a byte to the TX fifo; this should be called with the spinlock held */
1164 static void it8709_put_tx_byte(struct ite_dev *dev, u8 value)
1165 {
1166 it8709_wr(dev, value, IT85_C0DR);
1167 }
1168
1169 /* idle the receiver so that we won't receive samples until another
1170 pulse is detected; this must be called with the device spinlock held */
1171 static void it8709_idle_rx(struct ite_dev *dev)
1172 {
1173 ite_dbg("%s called", __func__);
1174
1175 /* disable streaming by clearing RXACT writing it as 1 */
1176 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
1177 IT85_C0RCR);
1178
1179 /* clear the FIFO */
1180 it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
1181 IT85_C0MSTCR);
1182 }
1183
1184 /* disable the receiver; this must be called with the device spinlock held */
1185 static void it8709_disable_rx(struct ite_dev *dev)
1186 {
1187 ite_dbg("%s called", __func__);
1188
1189 /* disable the receiver interrupts */
1190 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1191 ~(IT85_RDAIE | IT85_RFOIE),
1192 IT85_C0IER);
1193
1194 /* disable the receiver */
1195 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
1196 IT85_C0RCR);
1197
1198 /* clear the FIFO and RXACT (actually RXACT should have been cleared
1199 * in the previous it8709_wr(dev, ) call) */
1200 it8709_idle_rx(dev);
1201 }
1202
1203 /* enable the receiver; this must be called with the device spinlock held */
1204 static void it8709_enable_rx(struct ite_dev *dev)
1205 {
1206 ite_dbg("%s called", __func__);
1207
1208 /* enable the receiver by setting RXEN */
1209 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
1210 IT85_C0RCR);
1211
1212 /* just prepare it to idle for the next reception */
1213 it8709_idle_rx(dev);
1214
1215 /* enable the receiver interrupts and master enable flag */
1216 it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1217 |IT85_RDAIE | IT85_RFOIE | IT85_IEC,
1218 IT85_C0IER);
1219 }
1220
1221 /* disable the transmitter interrupt; this must be called with the device
1222 * spinlock held */
1223 static void it8709_disable_tx_interrupt(struct ite_dev *dev)
1224 {
1225 ite_dbg("%s called", __func__);
1226
1227 /* disable the transmitter interrupts */
1228 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
1229 IT85_C0IER);
1230 }
1231
1232 /* enable the transmitter interrupt; this must be called with the device
1233 * spinlock held */
1234 static void it8709_enable_tx_interrupt(struct ite_dev *dev)
1235 {
1236 ite_dbg("%s called", __func__);
1237
1238 /* enable the transmitter interrupts and master enable flag */
1239 it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1240 |IT85_TLDLIE | IT85_IEC,
1241 IT85_C0IER);
1242 }
1243
1244 /* disable the device; this must be called with the device spinlock held */
1245 static void it8709_disable(struct ite_dev *dev)
1246 {
1247 ite_dbg("%s called", __func__);
1248
1249 /* clear out all interrupt enable flags */
1250 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1251 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
1252 IT85_C0IER);
1253
1254 /* disable the receiver */
1255 it8709_disable_rx(dev);
1256
1257 /* erase the FIFO */
1258 it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
1259 IT85_C0MSTCR);
1260 }
1261
1262 /* initialize the hardware */
1263 static void it8709_init_hardware(struct ite_dev *dev)
1264 {
1265 ite_dbg("%s called", __func__);
1266
1267 /* disable all the interrupts */
1268 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1269 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
1270 IT85_C0IER);
1271
1272 /* program the baud rate divisor */
1273 it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
1274 it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
1275 IT85_C0BDHR);
1276
1277 /* program the C0MSTCR register defaults */
1278 it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) &
1279 ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL
1280 | IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT,
1281 IT85_C0MSTCR);
1282
1283 /* program the C0RCR register defaults */
1284 it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) &
1285 ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT
1286 | IT85_RXDCR)) | ITE_RXDCR_DEFAULT,
1287 IT85_C0RCR);
1288
1289 /* program the C0TCR register defaults */
1290 it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW))
1291 | IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT
1292 | IT85_TXMPW_DEFAULT,
1293 IT85_C0TCR);
1294
1295 /* program the carrier parameters */
1296 ite_set_carrier_params(dev);
1297 }
1298
1299
1300 /* generic hardware setup/teardown code */
1301
1302 /* activate the device for use */
1303 static int ite_open(struct rc_dev *rcdev)
1304 {
1305 struct ite_dev *dev = rcdev->priv;
1306 unsigned long flags;
1307
1308 ite_dbg("%s called", __func__);
1309
1310 spin_lock_irqsave(&dev->lock, flags);
1311 dev->in_use = true;
1312
1313 /* enable the receiver */
1314 dev->params.enable_rx(dev);
1315
1316 spin_unlock_irqrestore(&dev->lock, flags);
1317
1318 return 0;
1319 }
1320
1321 /* deactivate the device for use */
1322 static void ite_close(struct rc_dev *rcdev)
1323 {
1324 struct ite_dev *dev = rcdev->priv;
1325 unsigned long flags;
1326
1327 ite_dbg("%s called", __func__);
1328
1329 spin_lock_irqsave(&dev->lock, flags);
1330 dev->in_use = false;
1331
1332 /* wait for any transmission to end */
1333 spin_unlock_irqrestore(&dev->lock, flags);
1334 wait_event_interruptible(dev->tx_ended, !dev->transmitting);
1335 spin_lock_irqsave(&dev->lock, flags);
1336
1337 dev->params.disable(dev);
1338
1339 spin_unlock_irqrestore(&dev->lock, flags);
1340 }
1341
1342 /* supported models and their parameters */
1343 static const struct ite_dev_params ite_dev_descs[] = {
1344 { /* 0: ITE8704 */
1345 .model = "ITE8704 CIR transceiver",
1346 .io_region_size = IT87_IOREG_LENGTH,
1347 .io_rsrc_no = 0,
1348 .hw_tx_capable = true,
1349 .sample_period = (u32) (1000000000ULL / 115200),
1350 .tx_carrier_freq = 38000,
1351 .tx_duty_cycle = 33,
1352 .rx_low_carrier_freq = 0,
1353 .rx_high_carrier_freq = 0,
1354
1355 /* operations */
1356 .get_irq_causes = it87_get_irq_causes,
1357 .enable_rx = it87_enable_rx,
1358 .idle_rx = it87_idle_rx,
1359 .disable_rx = it87_idle_rx,
1360 .get_rx_bytes = it87_get_rx_bytes,
1361 .enable_tx_interrupt = it87_enable_tx_interrupt,
1362 .disable_tx_interrupt = it87_disable_tx_interrupt,
1363 .get_tx_used_slots = it87_get_tx_used_slots,
1364 .put_tx_byte = it87_put_tx_byte,
1365 .disable = it87_disable,
1366 .init_hardware = it87_init_hardware,
1367 .set_carrier_params = it87_set_carrier_params,
1368 },
1369 { /* 1: ITE8713 */
1370 .model = "ITE8713 CIR transceiver",
1371 .io_region_size = IT87_IOREG_LENGTH,
1372 .io_rsrc_no = 0,
1373 .hw_tx_capable = true,
1374 .sample_period = (u32) (1000000000ULL / 115200),
1375 .tx_carrier_freq = 38000,
1376 .tx_duty_cycle = 33,
1377 .rx_low_carrier_freq = 0,
1378 .rx_high_carrier_freq = 0,
1379
1380 /* operations */
1381 .get_irq_causes = it87_get_irq_causes,
1382 .enable_rx = it87_enable_rx,
1383 .idle_rx = it87_idle_rx,
1384 .disable_rx = it87_idle_rx,
1385 .get_rx_bytes = it87_get_rx_bytes,
1386 .enable_tx_interrupt = it87_enable_tx_interrupt,
1387 .disable_tx_interrupt = it87_disable_tx_interrupt,
1388 .get_tx_used_slots = it87_get_tx_used_slots,
1389 .put_tx_byte = it87_put_tx_byte,
1390 .disable = it87_disable,
1391 .init_hardware = it87_init_hardware,
1392 .set_carrier_params = it87_set_carrier_params,
1393 },
1394 { /* 2: ITE8708 */
1395 .model = "ITE8708 CIR transceiver",
1396 .io_region_size = IT8708_IOREG_LENGTH,
1397 .io_rsrc_no = 0,
1398 .hw_tx_capable = true,
1399 .sample_period = (u32) (1000000000ULL / 115200),
1400 .tx_carrier_freq = 38000,
1401 .tx_duty_cycle = 33,
1402 .rx_low_carrier_freq = 0,
1403 .rx_high_carrier_freq = 0,
1404
1405 /* operations */
1406 .get_irq_causes = it8708_get_irq_causes,
1407 .enable_rx = it8708_enable_rx,
1408 .idle_rx = it8708_idle_rx,
1409 .disable_rx = it8708_idle_rx,
1410 .get_rx_bytes = it8708_get_rx_bytes,
1411 .enable_tx_interrupt = it8708_enable_tx_interrupt,
1412 .disable_tx_interrupt =
1413 it8708_disable_tx_interrupt,
1414 .get_tx_used_slots = it8708_get_tx_used_slots,
1415 .put_tx_byte = it8708_put_tx_byte,
1416 .disable = it8708_disable,
1417 .init_hardware = it8708_init_hardware,
1418 .set_carrier_params = it8708_set_carrier_params,
1419 },
1420 { /* 3: ITE8709 */
1421 .model = "ITE8709 CIR transceiver",
1422 .io_region_size = IT8709_IOREG_LENGTH,
1423 .io_rsrc_no = 2,
1424 .hw_tx_capable = true,
1425 .sample_period = (u32) (1000000000ULL / 115200),
1426 .tx_carrier_freq = 38000,
1427 .tx_duty_cycle = 33,
1428 .rx_low_carrier_freq = 0,
1429 .rx_high_carrier_freq = 0,
1430
1431 /* operations */
1432 .get_irq_causes = it8709_get_irq_causes,
1433 .enable_rx = it8709_enable_rx,
1434 .idle_rx = it8709_idle_rx,
1435 .disable_rx = it8709_idle_rx,
1436 .get_rx_bytes = it8709_get_rx_bytes,
1437 .enable_tx_interrupt = it8709_enable_tx_interrupt,
1438 .disable_tx_interrupt =
1439 it8709_disable_tx_interrupt,
1440 .get_tx_used_slots = it8709_get_tx_used_slots,
1441 .put_tx_byte = it8709_put_tx_byte,
1442 .disable = it8709_disable,
1443 .init_hardware = it8709_init_hardware,
1444 .set_carrier_params = it8709_set_carrier_params,
1445 },
1446 };
1447
1448 static const struct pnp_device_id ite_ids[] = {
1449 {"ITE8704", 0}, /* Default model */
1450 {"ITE8713", 1}, /* CIR found in EEEBox 1501U */
1451 {"ITE8708", 2}, /* Bridged IT8512 */
1452 {"ITE8709", 3}, /* SRAM-Bridged IT8512 */
1453 {"", 0},
1454 };
1455
1456 /* allocate memory, probe hardware, and initialize everything */
1457 static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id
1458 *dev_id)
1459 {
1460 const struct ite_dev_params *dev_desc = NULL;
1461 struct ite_dev *itdev = NULL;
1462 struct rc_dev *rdev = NULL;
1463 int ret = -ENOMEM;
1464 int model_no;
1465 int io_rsrc_no;
1466
1467 ite_dbg("%s called", __func__);
1468
1469 itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL);
1470 if (!itdev)
1471 return ret;
1472
1473 /* input device for IR remote (and tx) */
1474 rdev = rc_allocate_device();
1475 if (!rdev)
1476 goto failure;
1477
1478 ret = -ENODEV;
1479
1480 /* get the model number */
1481 model_no = (int)dev_id->driver_data;
1482 ite_pr(KERN_NOTICE, "Auto-detected model: %s\n",
1483 ite_dev_descs[model_no].model);
1484
1485 if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) {
1486 model_no = model_number;
1487 ite_pr(KERN_NOTICE, "The model has been fixed by a module "
1488 "parameter.");
1489 }
1490
1491 ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model);
1492
1493 /* get the description for the device */
1494 dev_desc = &ite_dev_descs[model_no];
1495 io_rsrc_no = dev_desc->io_rsrc_no;
1496
1497 /* validate pnp resources */
1498 if (!pnp_port_valid(pdev, io_rsrc_no) ||
1499 pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) {
1500 dev_err(&pdev->dev, "IR PNP Port not valid!\n");
1501 goto failure;
1502 }
1503
1504 if (!pnp_irq_valid(pdev, 0)) {
1505 dev_err(&pdev->dev, "PNP IRQ not valid!\n");
1506 goto failure;
1507 }
1508
1509 /* store resource values */
1510 itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no);
1511 itdev->cir_irq = pnp_irq(pdev, 0);
1512
1513 /* initialize spinlocks */
1514 spin_lock_init(&itdev->lock);
1515
1516 /* initialize raw event */
1517 init_ir_raw_event(&itdev->rawir);
1518
1519 ret = -EBUSY;
1520 /* now claim resources */
1521 if (!request_region(itdev->cir_addr,
1522 dev_desc->io_region_size, ITE_DRIVER_NAME))
1523 goto failure;
1524
1525 if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
1526 ITE_DRIVER_NAME, (void *)itdev))
1527 goto failure;
1528
1529 /* set driver data into the pnp device */
1530 pnp_set_drvdata(pdev, itdev);
1531 itdev->pdev = pdev;
1532
1533 /* initialize waitqueues for transmission */
1534 init_waitqueue_head(&itdev->tx_queue);
1535 init_waitqueue_head(&itdev->tx_ended);
1536
1537 /* copy model-specific parameters */
1538 itdev->params = *dev_desc;
1539
1540 /* apply any overrides */
1541 if (sample_period > 0)
1542 itdev->params.sample_period = sample_period;
1543
1544 if (tx_carrier_freq > 0)
1545 itdev->params.tx_carrier_freq = tx_carrier_freq;
1546
1547 if (tx_duty_cycle > 0 && tx_duty_cycle <= 100)
1548 itdev->params.tx_duty_cycle = tx_duty_cycle;
1549
1550 if (rx_low_carrier_freq > 0)
1551 itdev->params.rx_low_carrier_freq = rx_low_carrier_freq;
1552
1553 if (rx_high_carrier_freq > 0)
1554 itdev->params.rx_high_carrier_freq = rx_high_carrier_freq;
1555
1556 /* print out parameters */
1557 ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int)
1558 itdev->params.hw_tx_capable);
1559 ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long)
1560 itdev->params.sample_period);
1561 ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int)
1562 itdev->params.tx_carrier_freq);
1563 ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int)
1564 itdev->params.tx_duty_cycle);
1565 ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int)
1566 itdev->params.rx_low_carrier_freq);
1567 ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int)
1568 itdev->params.rx_high_carrier_freq);
1569
1570 /* set up hardware initial state */
1571 itdev->params.init_hardware(itdev);
1572
1573 /* set up ir-core props */
1574 rdev->priv = itdev;
1575 rdev->driver_type = RC_DRIVER_IR_RAW;
1576 rdev->allowed_protos = RC_TYPE_ALL;
1577 rdev->open = ite_open;
1578 rdev->close = ite_close;
1579 rdev->s_idle = ite_s_idle;
1580 rdev->s_rx_carrier_range = ite_set_rx_carrier_range;
1581 rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT;
1582 rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT;
1583 rdev->timeout = ITE_IDLE_TIMEOUT;
1584 rdev->rx_resolution = ITE_BAUDRATE_DIVISOR *
1585 itdev->params.sample_period;
1586 rdev->tx_resolution = ITE_BAUDRATE_DIVISOR *
1587 itdev->params.sample_period;
1588
1589 /* set up transmitter related values if needed */
1590 if (itdev->params.hw_tx_capable) {
1591 rdev->tx_ir = ite_tx_ir;
1592 rdev->s_tx_carrier = ite_set_tx_carrier;
1593 rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle;
1594 }
1595
1596 rdev->input_name = dev_desc->model;
1597 rdev->input_id.bustype = BUS_HOST;
1598 rdev->input_id.vendor = PCI_VENDOR_ID_ITE;
1599 rdev->input_id.product = 0;
1600 rdev->input_id.version = 0;
1601 rdev->driver_name = ITE_DRIVER_NAME;
1602 rdev->map_name = RC_MAP_RC6_MCE;
1603
1604 ret = rc_register_device(rdev);
1605 if (ret)
1606 goto failure;
1607
1608 itdev->rdev = rdev;
1609 ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
1610
1611 return 0;
1612
1613 failure:
1614 if (itdev->cir_irq)
1615 free_irq(itdev->cir_irq, itdev);
1616
1617 if (itdev->cir_addr)
1618 release_region(itdev->cir_addr, itdev->params.io_region_size);
1619
1620 rc_free_device(rdev);
1621 kfree(itdev);
1622
1623 return ret;
1624 }
1625
1626 static void __devexit ite_remove(struct pnp_dev *pdev)
1627 {
1628 struct ite_dev *dev = pnp_get_drvdata(pdev);
1629 unsigned long flags;
1630
1631 ite_dbg("%s called", __func__);
1632
1633 spin_lock_irqsave(&dev->lock, flags);
1634
1635 /* disable hardware */
1636 dev->params.disable(dev);
1637
1638 spin_unlock_irqrestore(&dev->lock, flags);
1639
1640 /* free resources */
1641 free_irq(dev->cir_irq, dev);
1642 release_region(dev->cir_addr, dev->params.io_region_size);
1643
1644 rc_unregister_device(dev->rdev);
1645
1646 kfree(dev);
1647 }
1648
1649 static int ite_suspend(struct pnp_dev *pdev, pm_message_t state)
1650 {
1651 struct ite_dev *dev = pnp_get_drvdata(pdev);
1652 unsigned long flags;
1653
1654 ite_dbg("%s called", __func__);
1655
1656 /* wait for any transmission to end */
1657 wait_event_interruptible(dev->tx_ended, !dev->transmitting);
1658
1659 spin_lock_irqsave(&dev->lock, flags);
1660
1661 /* disable all interrupts */
1662 dev->params.disable(dev);
1663
1664 spin_unlock_irqrestore(&dev->lock, flags);
1665
1666 return 0;
1667 }
1668
1669 static int ite_resume(struct pnp_dev *pdev)
1670 {
1671 int ret = 0;
1672 struct ite_dev *dev = pnp_get_drvdata(pdev);
1673 unsigned long flags;
1674
1675 ite_dbg("%s called", __func__);
1676
1677 spin_lock_irqsave(&dev->lock, flags);
1678
1679 /* reinitialize hardware config registers */
1680 dev->params.init_hardware(dev);
1681 /* enable the receiver */
1682 dev->params.enable_rx(dev);
1683
1684 spin_unlock_irqrestore(&dev->lock, flags);
1685
1686 return ret;
1687 }
1688
1689 static void ite_shutdown(struct pnp_dev *pdev)
1690 {
1691 struct ite_dev *dev = pnp_get_drvdata(pdev);
1692 unsigned long flags;
1693
1694 ite_dbg("%s called", __func__);
1695
1696 spin_lock_irqsave(&dev->lock, flags);
1697
1698 /* disable all interrupts */
1699 dev->params.disable(dev);
1700
1701 spin_unlock_irqrestore(&dev->lock, flags);
1702 }
1703
1704 static struct pnp_driver ite_driver = {
1705 .name = ITE_DRIVER_NAME,
1706 .id_table = ite_ids,
1707 .probe = ite_probe,
1708 .remove = __devexit_p(ite_remove),
1709 .suspend = ite_suspend,
1710 .resume = ite_resume,
1711 .shutdown = ite_shutdown,
1712 };
1713
1714 int ite_init(void)
1715 {
1716 return pnp_register_driver(&ite_driver);
1717 }
1718
1719 void ite_exit(void)
1720 {
1721 pnp_unregister_driver(&ite_driver);
1722 }
1723
1724 MODULE_DEVICE_TABLE(pnp, ite_ids);
1725 MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
1726
1727 MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
1728 MODULE_LICENSE("GPL");
1729
1730 module_init(ite_init);
1731 module_exit(ite_exit);
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