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-rw-r--r--drivers/media/rc/ite-cir.c1734
1 files changed, 1734 insertions, 0 deletions
diff --git a/drivers/media/rc/ite-cir.c b/drivers/media/rc/ite-cir.c
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index 000000000000..10358d5b3189
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+++ b/drivers/media/rc/ite-cir.c
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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/slab.h>
40#include <linux/input.h>
41#include <linux/bitops.h>
42#include <media/rc-core.h>
43#include <linux/pci_ids.h>
44
45#include "ite-cir.h"
46
47/* module parameters */
48
49/* debug level */
50static int debug;
51module_param(debug, int, S_IRUGO | S_IWUSR);
52MODULE_PARM_DESC(debug, "Enable debugging output");
53
54/* low limit for RX carrier freq, Hz, 0 for no RX demodulation */
55static int rx_low_carrier_freq;
56module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR);
57MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, "
58 "0 for no RX demodulation");
59
60/* high limit for RX carrier freq, Hz, 0 for no RX demodulation */
61static int rx_high_carrier_freq;
62module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR);
63MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, "
64 "Hz, 0 for no RX demodulation");
65
66/* override tx carrier frequency */
67static int tx_carrier_freq;
68module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR);
69MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz");
70
71/* override tx duty cycle */
72static int tx_duty_cycle;
73module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR);
74MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100");
75
76/* override default sample period */
77static long sample_period;
78module_param(sample_period, long, S_IRUGO | S_IWUSR);
79MODULE_PARM_DESC(sample_period, "Override carrier sample period, us");
80
81/* override detected model id */
82static int model_number = -1;
83module_param(model_number, int, S_IRUGO | S_IWUSR);
84MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect");
85
86
87/* HW-independent code functions */
88
89/* check whether carrier frequency is high frequency */
90static inline bool ite_is_high_carrier_freq(unsigned int freq)
91{
92 return freq >= ITE_HCF_MIN_CARRIER_FREQ;
93}
94
95/* get the bits required to program the carrier frequency in CFQ bits,
96 * unshifted */
97static u8 ite_get_carrier_freq_bits(unsigned int freq)
98{
99 if (ite_is_high_carrier_freq(freq)) {
100 if (freq < 425000)
101 return ITE_CFQ_400;
102
103 else if (freq < 465000)
104 return ITE_CFQ_450;
105
106 else if (freq < 490000)
107 return ITE_CFQ_480;
108
109 else
110 return ITE_CFQ_500;
111 } else {
112 /* trim to limits */
113 if (freq < ITE_LCF_MIN_CARRIER_FREQ)
114 freq = ITE_LCF_MIN_CARRIER_FREQ;
115 if (freq > ITE_LCF_MAX_CARRIER_FREQ)
116 freq = ITE_LCF_MAX_CARRIER_FREQ;
117
118 /* convert to kHz and subtract the base freq */
119 freq =
120 DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ,
121 1000);
122
123 return (u8) freq;
124 }
125}
126
127/* get the bits required to program the pulse with in TXMPW */
128static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle)
129{
130 unsigned long period_ns, on_ns;
131
132 /* sanitize freq into range */
133 if (freq < ITE_LCF_MIN_CARRIER_FREQ)
134 freq = ITE_LCF_MIN_CARRIER_FREQ;
135 if (freq > ITE_HCF_MAX_CARRIER_FREQ)
136 freq = ITE_HCF_MAX_CARRIER_FREQ;
137
138 period_ns = 1000000000UL / freq;
139 on_ns = period_ns * duty_cycle / 100;
140
141 if (ite_is_high_carrier_freq(freq)) {
142 if (on_ns < 750)
143 return ITE_TXMPW_A;
144
145 else if (on_ns < 850)
146 return ITE_TXMPW_B;
147
148 else if (on_ns < 950)
149 return ITE_TXMPW_C;
150
151 else if (on_ns < 1080)
152 return ITE_TXMPW_D;
153
154 else
155 return ITE_TXMPW_E;
156 } else {
157 if (on_ns < 6500)
158 return ITE_TXMPW_A;
159
160 else if (on_ns < 7850)
161 return ITE_TXMPW_B;
162
163 else if (on_ns < 9650)
164 return ITE_TXMPW_C;
165
166 else if (on_ns < 11950)
167 return ITE_TXMPW_D;
168
169 else
170 return ITE_TXMPW_E;
171 }
172}
173
174/* decode raw bytes as received by the hardware, and push them to the ir-core
175 * layer */
176static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int
177 length)
178{
179 u32 sample_period;
180 unsigned long *ldata;
181 unsigned int next_one, next_zero, size;
182 DEFINE_IR_RAW_EVENT(ev);
183
184 if (length == 0)
185 return;
186
187 sample_period = dev->params.sample_period;
188 ldata = (unsigned long *)data;
189 size = length << 3;
190 next_one = generic_find_next_le_bit(ldata, size, 0);
191 if (next_one > 0) {
192 ev.pulse = true;
193 ev.duration =
194 ITE_BITS_TO_NS(next_one, sample_period);
195 ir_raw_event_store_with_filter(dev->rdev, &ev);
196 }
197
198 while (next_one < size) {
199 next_zero = generic_find_next_zero_le_bit(ldata, size, next_one + 1);
200 ev.pulse = false;
201 ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period);
202 ir_raw_event_store_with_filter(dev->rdev, &ev);
203
204 if (next_zero < size) {
205 next_one =
206 generic_find_next_le_bit(ldata,
207 size,
208 next_zero + 1);
209 ev.pulse = true;
210 ev.duration =
211 ITE_BITS_TO_NS(next_one - next_zero,
212 sample_period);
213 ir_raw_event_store_with_filter
214 (dev->rdev, &ev);
215 } else
216 next_one = size;
217 }
218
219 ir_raw_event_handle(dev->rdev);
220
221 ite_dbg_verbose("decoded %d bytes.", length);
222}
223
224/* set all the rx/tx carrier parameters; this must be called with the device
225 * spinlock held */
226static void ite_set_carrier_params(struct ite_dev *dev)
227{
228 unsigned int freq, low_freq, high_freq;
229 int allowance;
230 bool use_demodulator;
231 bool for_tx = dev->transmitting;
232
233 ite_dbg("%s called", __func__);
234
235 if (for_tx) {
236 /* we don't need no stinking calculations */
237 freq = dev->params.tx_carrier_freq;
238 allowance = ITE_RXDCR_DEFAULT;
239 use_demodulator = false;
240 } else {
241 low_freq = dev->params.rx_low_carrier_freq;
242 high_freq = dev->params.rx_high_carrier_freq;
243
244 if (low_freq == 0) {
245 /* don't demodulate */
246 freq =
247 ITE_DEFAULT_CARRIER_FREQ;
248 allowance = ITE_RXDCR_DEFAULT;
249 use_demodulator = false;
250 } else {
251 /* calculate the middle freq */
252 freq = (low_freq + high_freq) / 2;
253
254 /* calculate the allowance */
255 allowance =
256 DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq),
257 ITE_RXDCR_PER_10000_STEP
258 * (high_freq + low_freq));
259
260 if (allowance < 1)
261 allowance = 1;
262
263 if (allowance > ITE_RXDCR_MAX)
264 allowance = ITE_RXDCR_MAX;
265 }
266 }
267
268 /* set the carrier parameters in a device-dependent way */
269 dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq),
270 use_demodulator, ite_get_carrier_freq_bits(freq), allowance,
271 ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle));
272}
273
274/* interrupt service routine for incoming and outgoing CIR data */
275static irqreturn_t ite_cir_isr(int irq, void *data)
276{
277 struct ite_dev *dev = data;
278 unsigned long flags;
279 irqreturn_t ret = IRQ_RETVAL(IRQ_NONE);
280 u8 rx_buf[ITE_RX_FIFO_LEN];
281 int rx_bytes;
282 int iflags;
283
284 ite_dbg_verbose("%s firing", __func__);
285
286 /* grab the spinlock */
287 spin_lock_irqsave(&dev->lock, flags);
288
289 /* read the interrupt flags */
290 iflags = dev->params.get_irq_causes(dev);
291
292 /* check for the receive interrupt */
293 if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
294 /* read the FIFO bytes */
295 rx_bytes =
296 dev->params.get_rx_bytes(dev, rx_buf,
297 ITE_RX_FIFO_LEN);
298
299 if (rx_bytes > 0) {
300 /* drop the spinlock, since the ir-core layer
301 * may call us back again through
302 * ite_s_idle() */
303 spin_unlock_irqrestore(&dev->
304 lock,
305 flags);
306
307 /* decode the data we've just received */
308 ite_decode_bytes(dev, rx_buf,
309 rx_bytes);
310
311 /* reacquire the spinlock */
312 spin_lock_irqsave(&dev->lock,
313 flags);
314
315 /* mark the interrupt as serviced */
316 ret = IRQ_RETVAL(IRQ_HANDLED);
317 }
318 } else if (iflags & ITE_IRQ_TX_FIFO) {
319 /* FIFO space available interrupt */
320 ite_dbg_verbose("got interrupt for TX FIFO");
321
322 /* wake any sleeping transmitter */
323 wake_up_interruptible(&dev->tx_queue);
324
325 /* mark the interrupt as serviced */
326 ret = IRQ_RETVAL(IRQ_HANDLED);
327 }
328
329 /* drop the spinlock */
330 spin_unlock_irqrestore(&dev->lock, flags);
331
332 ite_dbg_verbose("%s done returning %d", __func__, (int)ret);
333
334 return ret;
335}
336
337/* set the rx carrier freq range, guess it's in Hz... */
338static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32
339 carrier_high)
340{
341 unsigned long flags;
342 struct ite_dev *dev = rcdev->priv;
343
344 spin_lock_irqsave(&dev->lock, flags);
345 dev->params.rx_low_carrier_freq = carrier_low;
346 dev->params.rx_high_carrier_freq = carrier_high;
347 ite_set_carrier_params(dev);
348 spin_unlock_irqrestore(&dev->lock, flags);
349
350 return 0;
351}
352
353/* set the tx carrier freq, guess it's in Hz... */
354static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
355{
356 unsigned long flags;
357 struct ite_dev *dev = rcdev->priv;
358
359 spin_lock_irqsave(&dev->lock, flags);
360 dev->params.tx_carrier_freq = carrier;
361 ite_set_carrier_params(dev);
362 spin_unlock_irqrestore(&dev->lock, flags);
363
364 return 0;
365}
366
367/* set the tx duty cycle by controlling the pulse width */
368static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle)
369{
370 unsigned long flags;
371 struct ite_dev *dev = rcdev->priv;
372
373 spin_lock_irqsave(&dev->lock, flags);
374 dev->params.tx_duty_cycle = duty_cycle;
375 ite_set_carrier_params(dev);
376 spin_unlock_irqrestore(&dev->lock, flags);
377
378 return 0;
379}
380
381/* transmit out IR pulses; what you get here is a batch of alternating
382 * pulse/space/pulse/space lengths that we should write out completely through
383 * the FIFO, blocking on a full FIFO */
384static int ite_tx_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
385{
386 unsigned long flags;
387 struct ite_dev *dev = rcdev->priv;
388 bool is_pulse = false;
389 int remaining_us, fifo_avail, fifo_remaining, last_idx = 0;
390 int max_rle_us, next_rle_us;
391 int ret = n;
392 u8 last_sent[ITE_TX_FIFO_LEN];
393 u8 val;
394
395 ite_dbg("%s called", __func__);
396
397 /* clear the array just in case */
398 memset(last_sent, 0, ARRAY_SIZE(last_sent));
399
400 /* n comes in bytes; convert to ints */
401 n /= sizeof(int);
402
403 spin_lock_irqsave(&dev->lock, flags);
404
405 /* let everybody know we're now transmitting */
406 dev->transmitting = true;
407
408 /* and set the carrier values for transmission */
409 ite_set_carrier_params(dev);
410
411 /* calculate how much time we can send in one byte */
412 max_rle_us =
413 (ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
414 ITE_TX_MAX_RLE) / 1000;
415
416 /* disable the receiver */
417 dev->params.disable_rx(dev);
418
419 /* this is where we'll begin filling in the FIFO, until it's full.
420 * then we'll just activate the interrupt, wait for it to wake us up
421 * again, disable it, continue filling the FIFO... until everything
422 * has been pushed out */
423 fifo_avail =
424 ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
425
426 while (n > 0 && dev->in_use) {
427 /* transmit the next sample */
428 is_pulse = !is_pulse;
429 remaining_us = *(txbuf++);
430 n--;
431
432 ite_dbg("%s: %ld",
433 ((is_pulse) ? "pulse" : "space"),
434 (long int)
435 remaining_us);
436
437 /* repeat while the pulse is non-zero length */
438 while (remaining_us > 0 && dev->in_use) {
439 if (remaining_us > max_rle_us)
440 next_rle_us = max_rle_us;
441
442 else
443 next_rle_us = remaining_us;
444
445 remaining_us -= next_rle_us;
446
447 /* check what's the length we have to pump out */
448 val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
449
450 /* put it into the sent buffer */
451 last_sent[last_idx++] = val;
452 last_idx &= (ITE_TX_FIFO_LEN);
453
454 /* encode it for 7 bits */
455 val = (val - 1) & ITE_TX_RLE_MASK;
456
457 /* take into account pulse/space prefix */
458 if (is_pulse)
459 val |= ITE_TX_PULSE;
460
461 else
462 val |= ITE_TX_SPACE;
463
464 /* if we get to 0 available, read again, just in case
465 * some other slot got freed */
466 if (fifo_avail <= 0)
467 fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
468
469 /* if it's still full */
470 if (fifo_avail <= 0) {
471 /* enable the tx interrupt */
472 dev->params.
473 enable_tx_interrupt(dev);
474
475 /* drop the spinlock */
476 spin_unlock_irqrestore(&dev->lock, flags);
477
478 /* wait for the FIFO to empty enough */
479 wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
480
481 /* get the spinlock again */
482 spin_lock_irqsave(&dev->lock, flags);
483
484 /* disable the tx interrupt again. */
485 dev->params.
486 disable_tx_interrupt(dev);
487 }
488
489 /* now send the byte through the FIFO */
490 dev->params.put_tx_byte(dev, val);
491 fifo_avail--;
492 }
493 }
494
495 /* wait and don't return until the whole FIFO has been sent out;
496 * otherwise we could configure the RX carrier params instead of the
497 * TX ones while the transmission is still being performed! */
498 fifo_remaining = dev->params.get_tx_used_slots(dev);
499 remaining_us = 0;
500 while (fifo_remaining > 0) {
501 fifo_remaining--;
502 last_idx--;
503 last_idx &= (ITE_TX_FIFO_LEN - 1);
504 remaining_us += last_sent[last_idx];
505 }
506 remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE);
507
508 /* drop the spinlock while we sleep */
509 spin_unlock_irqrestore(&dev->lock, flags);
510
511 /* sleep remaining_us microseconds */
512 mdelay(DIV_ROUND_UP(remaining_us, 1000));
513
514 /* reacquire the spinlock */
515 spin_lock_irqsave(&dev->lock, flags);
516
517 /* now we're not transmitting anymore */
518 dev->transmitting = false;
519
520 /* and set the carrier values for reception */
521 ite_set_carrier_params(dev);
522
523 /* reenable the receiver */
524 if (dev->in_use)
525 dev->params.enable_rx(dev);
526
527 /* notify transmission end */
528 wake_up_interruptible(&dev->tx_ended);
529
530 spin_unlock_irqrestore(&dev->lock, flags);
531
532 return ret;
533}
534
535/* idle the receiver if needed */
536static void ite_s_idle(struct rc_dev *rcdev, bool enable)
537{
538 unsigned long flags;
539 struct ite_dev *dev = rcdev->priv;
540
541 ite_dbg("%s called", __func__);
542
543 if (enable) {
544 spin_lock_irqsave(&dev->lock, flags);
545 dev->params.idle_rx(dev);
546 spin_unlock_irqrestore(&dev->lock, flags);
547 }
548}
549
550
551/* IT8712F HW-specific functions */
552
553/* retrieve a bitmask of the current causes for a pending interrupt; this may
554 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
555 * */
556static int it87_get_irq_causes(struct ite_dev *dev)
557{
558 u8 iflags;
559 int ret = 0;
560
561 ite_dbg("%s called", __func__);
562
563 /* read the interrupt flags */
564 iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II;
565
566 switch (iflags) {
567 case IT87_II_RXDS:
568 ret = ITE_IRQ_RX_FIFO;
569 break;
570 case IT87_II_RXFO:
571 ret = ITE_IRQ_RX_FIFO_OVERRUN;
572 break;
573 case IT87_II_TXLDL:
574 ret = ITE_IRQ_TX_FIFO;
575 break;
576 }
577
578 return ret;
579}
580
581/* set the carrier parameters; to be called with the spinlock held */
582static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq,
583 bool use_demodulator,
584 u8 carrier_freq_bits, u8 allowance_bits,
585 u8 pulse_width_bits)
586{
587 u8 val;
588
589 ite_dbg("%s called", __func__);
590
591 /* program the RCR register */
592 val = inb(dev->cir_addr + IT87_RCR)
593 & ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR);
594
595 if (high_freq)
596 val |= IT87_HCFS;
597
598 if (use_demodulator)
599 val |= IT87_RXEND;
600
601 val |= allowance_bits;
602
603 outb(val, dev->cir_addr + IT87_RCR);
604
605 /* program the TCR2 register */
606 outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits,
607 dev->cir_addr + IT87_TCR2);
608}
609
610/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
611 * held */
612static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
613{
614 int fifo, read = 0;
615
616 ite_dbg("%s called", __func__);
617
618 /* read how many bytes are still in the FIFO */
619 fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC;
620
621 while (fifo > 0 && buf_size > 0) {
622 *(buf++) = inb(dev->cir_addr + IT87_DR);
623 fifo--;
624 read++;
625 buf_size--;
626 }
627
628 return read;
629}
630
631/* return how many bytes are still in the FIFO; this will be called
632 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
633 * empty; let's expect this won't be a problem */
634static int it87_get_tx_used_slots(struct ite_dev *dev)
635{
636 ite_dbg("%s called", __func__);
637
638 return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC;
639}
640
641/* put a byte to the TX fifo; this should be called with the spinlock held */
642static void it87_put_tx_byte(struct ite_dev *dev, u8 value)
643{
644 outb(value, dev->cir_addr + IT87_DR);
645}
646
647/* idle the receiver so that we won't receive samples until another
648 pulse is detected; this must be called with the device spinlock held */
649static void it87_idle_rx(struct ite_dev *dev)
650{
651 ite_dbg("%s called", __func__);
652
653 /* disable streaming by clearing RXACT writing it as 1 */
654 outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT,
655 dev->cir_addr + IT87_RCR);
656
657 /* clear the FIFO */
658 outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR,
659 dev->cir_addr + IT87_TCR1);
660}
661
662/* disable the receiver; this must be called with the device spinlock held */
663static void it87_disable_rx(struct ite_dev *dev)
664{
665 ite_dbg("%s called", __func__);
666
667 /* disable the receiver interrupts */
668 outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE),
669 dev->cir_addr + IT87_IER);
670
671 /* disable the receiver */
672 outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN,
673 dev->cir_addr + IT87_RCR);
674
675 /* clear the FIFO and RXACT (actually RXACT should have been cleared
676 * in the previous outb() call) */
677 it87_idle_rx(dev);
678}
679
680/* enable the receiver; this must be called with the device spinlock held */
681static void it87_enable_rx(struct ite_dev *dev)
682{
683 ite_dbg("%s called", __func__);
684
685 /* enable the receiver by setting RXEN */
686 outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN,
687 dev->cir_addr + IT87_RCR);
688
689 /* just prepare it to idle for the next reception */
690 it87_idle_rx(dev);
691
692 /* enable the receiver interrupts and master enable flag */
693 outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC,
694 dev->cir_addr + IT87_IER);
695}
696
697/* disable the transmitter interrupt; this must be called with the device
698 * spinlock held */
699static void it87_disable_tx_interrupt(struct ite_dev *dev)
700{
701 ite_dbg("%s called", __func__);
702
703 /* disable the transmitter interrupts */
704 outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE,
705 dev->cir_addr + IT87_IER);
706}
707
708/* enable the transmitter interrupt; this must be called with the device
709 * spinlock held */
710static void it87_enable_tx_interrupt(struct ite_dev *dev)
711{
712 ite_dbg("%s called", __func__);
713
714 /* enable the transmitter interrupts and master enable flag */
715 outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC,
716 dev->cir_addr + IT87_IER);
717}
718
719/* disable the device; this must be called with the device spinlock held */
720static void it87_disable(struct ite_dev *dev)
721{
722 ite_dbg("%s called", __func__);
723
724 /* clear out all interrupt enable flags */
725 outb(inb(dev->cir_addr + IT87_IER) &
726 ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE),
727 dev->cir_addr + IT87_IER);
728
729 /* disable the receiver */
730 it87_disable_rx(dev);
731
732 /* erase the FIFO */
733 outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1),
734 dev->cir_addr + IT87_TCR1);
735}
736
737/* initialize the hardware */
738static void it87_init_hardware(struct ite_dev *dev)
739{
740 ite_dbg("%s called", __func__);
741
742 /* enable just the baud rate divisor register,
743 disabling all the interrupts at the same time */
744 outb((inb(dev->cir_addr + IT87_IER) &
745 ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR,
746 dev->cir_addr + IT87_IER);
747
748 /* write out the baud rate divisor */
749 outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR);
750 outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR);
751
752 /* disable the baud rate divisor register again */
753 outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR,
754 dev->cir_addr + IT87_IER);
755
756 /* program the RCR register defaults */
757 outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR);
758
759 /* program the TCR1 register */
760 outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE
761 | IT87_FIFOTL_DEFAULT | IT87_FIFOCLR,
762 dev->cir_addr + IT87_TCR1);
763
764 /* program the carrier parameters */
765 ite_set_carrier_params(dev);
766}
767
768/* IT8512F on ITE8708 HW-specific functions */
769
770/* retrieve a bitmask of the current causes for a pending interrupt; this may
771 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
772 * */
773static int it8708_get_irq_causes(struct ite_dev *dev)
774{
775 u8 iflags;
776 int ret = 0;
777
778 ite_dbg("%s called", __func__);
779
780 /* read the interrupt flags */
781 iflags = inb(dev->cir_addr + IT8708_C0IIR);
782
783 if (iflags & IT85_TLDLI)
784 ret |= ITE_IRQ_TX_FIFO;
785 if (iflags & IT85_RDAI)
786 ret |= ITE_IRQ_RX_FIFO;
787 if (iflags & IT85_RFOI)
788 ret |= ITE_IRQ_RX_FIFO_OVERRUN;
789
790 return ret;
791}
792
793/* set the carrier parameters; to be called with the spinlock held */
794static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq,
795 bool use_demodulator,
796 u8 carrier_freq_bits, u8 allowance_bits,
797 u8 pulse_width_bits)
798{
799 u8 val;
800
801 ite_dbg("%s called", __func__);
802
803 /* program the C0CFR register, with HRAE=1 */
804 outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
805 dev->cir_addr + IT8708_BANKSEL);
806
807 val = (inb(dev->cir_addr + IT8708_C0CFR)
808 & ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits;
809
810 if (high_freq)
811 val |= IT85_HCFS;
812
813 outb(val, dev->cir_addr + IT8708_C0CFR);
814
815 outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
816 dev->cir_addr + IT8708_BANKSEL);
817
818 /* program the C0RCR register */
819 val = inb(dev->cir_addr + IT8708_C0RCR)
820 & ~(IT85_RXEND | IT85_RXDCR);
821
822 if (use_demodulator)
823 val |= IT85_RXEND;
824
825 val |= allowance_bits;
826
827 outb(val, dev->cir_addr + IT8708_C0RCR);
828
829 /* program the C0TCR register */
830 val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW;
831 val |= pulse_width_bits;
832 outb(val, dev->cir_addr + IT8708_C0TCR);
833}
834
835/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
836 * held */
837static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
838{
839 int fifo, read = 0;
840
841 ite_dbg("%s called", __func__);
842
843 /* read how many bytes are still in the FIFO */
844 fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC;
845
846 while (fifo > 0 && buf_size > 0) {
847 *(buf++) = inb(dev->cir_addr + IT8708_C0DR);
848 fifo--;
849 read++;
850 buf_size--;
851 }
852
853 return read;
854}
855
856/* return how many bytes are still in the FIFO; this will be called
857 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
858 * empty; let's expect this won't be a problem */
859static int it8708_get_tx_used_slots(struct ite_dev *dev)
860{
861 ite_dbg("%s called", __func__);
862
863 return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC;
864}
865
866/* put a byte to the TX fifo; this should be called with the spinlock held */
867static void it8708_put_tx_byte(struct ite_dev *dev, u8 value)
868{
869 outb(value, dev->cir_addr + IT8708_C0DR);
870}
871
872/* idle the receiver so that we won't receive samples until another
873 pulse is detected; this must be called with the device spinlock held */
874static void it8708_idle_rx(struct ite_dev *dev)
875{
876 ite_dbg("%s called", __func__);
877
878 /* disable streaming by clearing RXACT writing it as 1 */
879 outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT,
880 dev->cir_addr + IT8708_C0RCR);
881
882 /* clear the FIFO */
883 outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR,
884 dev->cir_addr + IT8708_C0MSTCR);
885}
886
887/* disable the receiver; this must be called with the device spinlock held */
888static void it8708_disable_rx(struct ite_dev *dev)
889{
890 ite_dbg("%s called", __func__);
891
892 /* disable the receiver interrupts */
893 outb(inb(dev->cir_addr + IT8708_C0IER) &
894 ~(IT85_RDAIE | IT85_RFOIE),
895 dev->cir_addr + IT8708_C0IER);
896
897 /* disable the receiver */
898 outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN,
899 dev->cir_addr + IT8708_C0RCR);
900
901 /* clear the FIFO and RXACT (actually RXACT should have been cleared
902 * in the previous outb() call) */
903 it8708_idle_rx(dev);
904}
905
906/* enable the receiver; this must be called with the device spinlock held */
907static void it8708_enable_rx(struct ite_dev *dev)
908{
909 ite_dbg("%s called", __func__);
910
911 /* enable the receiver by setting RXEN */
912 outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN,
913 dev->cir_addr + IT8708_C0RCR);
914
915 /* just prepare it to idle for the next reception */
916 it8708_idle_rx(dev);
917
918 /* enable the receiver interrupts and master enable flag */
919 outb(inb(dev->cir_addr + IT8708_C0IER)
920 |IT85_RDAIE | IT85_RFOIE | IT85_IEC,
921 dev->cir_addr + IT8708_C0IER);
922}
923
924/* disable the transmitter interrupt; this must be called with the device
925 * spinlock held */
926static void it8708_disable_tx_interrupt(struct ite_dev *dev)
927{
928 ite_dbg("%s called", __func__);
929
930 /* disable the transmitter interrupts */
931 outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE,
932 dev->cir_addr + IT8708_C0IER);
933}
934
935/* enable the transmitter interrupt; this must be called with the device
936 * spinlock held */
937static void it8708_enable_tx_interrupt(struct ite_dev *dev)
938{
939 ite_dbg("%s called", __func__);
940
941 /* enable the transmitter interrupts and master enable flag */
942 outb(inb(dev->cir_addr + IT8708_C0IER)
943 |IT85_TLDLIE | IT85_IEC,
944 dev->cir_addr + IT8708_C0IER);
945}
946
947/* disable the device; this must be called with the device spinlock held */
948static void it8708_disable(struct ite_dev *dev)
949{
950 ite_dbg("%s called", __func__);
951
952 /* clear out all interrupt enable flags */
953 outb(inb(dev->cir_addr + IT8708_C0IER) &
954 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
955 dev->cir_addr + IT8708_C0IER);
956
957 /* disable the receiver */
958 it8708_disable_rx(dev);
959
960 /* erase the FIFO */
961 outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR),
962 dev->cir_addr + IT8708_C0MSTCR);
963}
964
965/* initialize the hardware */
966static void it8708_init_hardware(struct ite_dev *dev)
967{
968 ite_dbg("%s called", __func__);
969
970 /* disable all the interrupts */
971 outb(inb(dev->cir_addr + IT8708_C0IER) &
972 ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
973 dev->cir_addr + IT8708_C0IER);
974
975 /* program the baud rate divisor */
976 outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
977 dev->cir_addr + IT8708_BANKSEL);
978
979 outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR);
980 outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
981 dev->cir_addr + IT8708_C0BDHR);
982
983 outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
984 dev->cir_addr + IT8708_BANKSEL);
985
986 /* program the C0MSTCR register defaults */
987 outb((inb(dev->cir_addr + IT8708_C0MSTCR) &
988 ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
989 IT85_FIFOCLR | IT85_RESET)) |
990 IT85_FIFOTL_DEFAULT,
991 dev->cir_addr + IT8708_C0MSTCR);
992
993 /* program the C0RCR register defaults */
994 outb((inb(dev->cir_addr + IT8708_C0RCR) &
995 ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND |
996 IT85_RXACT | IT85_RXDCR)) |
997 ITE_RXDCR_DEFAULT,
998 dev->cir_addr + IT8708_C0RCR);
999
1000 /* program the C0TCR register defaults */
1001 outb((inb(dev->cir_addr + IT8708_C0TCR) &
1002 ~(IT85_TXMPM | IT85_TXMPW))
1003 |IT85_TXRLE | IT85_TXENDF |
1004 IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT,
1005 dev->cir_addr + IT8708_C0TCR);
1006
1007 /* program the carrier parameters */
1008 ite_set_carrier_params(dev);
1009}
1010
1011/* IT8512F on ITE8709 HW-specific functions */
1012
1013/* read a byte from the SRAM module */
1014static inline u8 it8709_rm(struct ite_dev *dev, int index)
1015{
1016 outb(index, dev->cir_addr + IT8709_RAM_IDX);
1017 return inb(dev->cir_addr + IT8709_RAM_VAL);
1018}
1019
1020/* write a byte to the SRAM module */
1021static inline void it8709_wm(struct ite_dev *dev, u8 val, int index)
1022{
1023 outb(index, dev->cir_addr + IT8709_RAM_IDX);
1024 outb(val, dev->cir_addr + IT8709_RAM_VAL);
1025}
1026
1027static void it8709_wait(struct ite_dev *dev)
1028{
1029 int i = 0;
1030 /*
1031 * loop until device tells it's ready to continue
1032 * iterations count is usually ~750 but can sometimes achieve 13000
1033 */
1034 for (i = 0; i < 15000; i++) {
1035 udelay(2);
1036 if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE)
1037 break;
1038 }
1039}
1040
1041/* read the value of a CIR register */
1042static u8 it8709_rr(struct ite_dev *dev, int index)
1043{
1044 /* just wait in case the previous access was a write */
1045 it8709_wait(dev);
1046 it8709_wm(dev, index, IT8709_REG_IDX);
1047 it8709_wm(dev, IT8709_READ, IT8709_MODE);
1048
1049 /* wait for the read data to be available */
1050 it8709_wait(dev);
1051
1052 /* return the read value */
1053 return it8709_rm(dev, IT8709_REG_VAL);
1054}
1055
1056/* write the value of a CIR register */
1057static void it8709_wr(struct ite_dev *dev, u8 val, int index)
1058{
1059 /* we wait before writing, and not afterwards, since this allows us to
1060 * pipeline the host CPU with the microcontroller */
1061 it8709_wait(dev);
1062 it8709_wm(dev, val, IT8709_REG_VAL);
1063 it8709_wm(dev, index, IT8709_REG_IDX);
1064 it8709_wm(dev, IT8709_WRITE, IT8709_MODE);
1065}
1066
1067/* retrieve a bitmask of the current causes for a pending interrupt; this may
1068 * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
1069 * */
1070static int it8709_get_irq_causes(struct ite_dev *dev)
1071{
1072 u8 iflags;
1073 int ret = 0;
1074
1075 ite_dbg("%s called", __func__);
1076
1077 /* read the interrupt flags */
1078 iflags = it8709_rm(dev, IT8709_IIR);
1079
1080 if (iflags & IT85_TLDLI)
1081 ret |= ITE_IRQ_TX_FIFO;
1082 if (iflags & IT85_RDAI)
1083 ret |= ITE_IRQ_RX_FIFO;
1084 if (iflags & IT85_RFOI)
1085 ret |= ITE_IRQ_RX_FIFO_OVERRUN;
1086
1087 return ret;
1088}
1089
1090/* set the carrier parameters; to be called with the spinlock held */
1091static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
1092 bool use_demodulator,
1093 u8 carrier_freq_bits, u8 allowance_bits,
1094 u8 pulse_width_bits)
1095{
1096 u8 val;
1097
1098 ite_dbg("%s called", __func__);
1099
1100 val = (it8709_rr(dev, IT85_C0CFR)
1101 &~(IT85_HCFS | IT85_CFQ)) |
1102 carrier_freq_bits;
1103
1104 if (high_freq)
1105 val |= IT85_HCFS;
1106
1107 it8709_wr(dev, val, IT85_C0CFR);
1108
1109 /* program the C0RCR register */
1110 val = it8709_rr(dev, IT85_C0RCR)
1111 & ~(IT85_RXEND | IT85_RXDCR);
1112
1113 if (use_demodulator)
1114 val |= IT85_RXEND;
1115
1116 val |= allowance_bits;
1117
1118 it8709_wr(dev, val, IT85_C0RCR);
1119
1120 /* program the C0TCR register */
1121 val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
1122 val |= pulse_width_bits;
1123 it8709_wr(dev, val, IT85_C0TCR);
1124}
1125
1126/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
1127 * held */
1128static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
1129{
1130 int fifo, read = 0;
1131
1132 ite_dbg("%s called", __func__);
1133
1134 /* read how many bytes are still in the FIFO */
1135 fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC;
1136
1137 while (fifo > 0 && buf_size > 0) {
1138 *(buf++) = it8709_rm(dev, IT8709_FIFO + read);
1139 fifo--;
1140 read++;
1141 buf_size--;
1142 }
1143
1144 /* 'clear' the FIFO by setting the writing index to 0; this is
1145 * completely bound to be racy, but we can't help it, since it's a
1146 * limitation of the protocol */
1147 it8709_wm(dev, 0, IT8709_RFSR);
1148
1149 return read;
1150}
1151
1152/* return how many bytes are still in the FIFO; this will be called
1153 * with the device spinlock NOT HELD while waiting for the TX FIFO to get
1154 * empty; let's expect this won't be a problem */
1155static int it8709_get_tx_used_slots(struct ite_dev *dev)
1156{
1157 ite_dbg("%s called", __func__);
1158
1159 return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
1160}
1161
1162/* put a byte to the TX fifo; this should be called with the spinlock held */
1163static void it8709_put_tx_byte(struct ite_dev *dev, u8 value)
1164{
1165 it8709_wr(dev, value, IT85_C0DR);
1166}
1167
1168/* idle the receiver so that we won't receive samples until another
1169 pulse is detected; this must be called with the device spinlock held */
1170static void it8709_idle_rx(struct ite_dev *dev)
1171{
1172 ite_dbg("%s called", __func__);
1173
1174 /* disable streaming by clearing RXACT writing it as 1 */
1175 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
1176 IT85_C0RCR);
1177
1178 /* clear the FIFO */
1179 it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
1180 IT85_C0MSTCR);
1181}
1182
1183/* disable the receiver; this must be called with the device spinlock held */
1184static void it8709_disable_rx(struct ite_dev *dev)
1185{
1186 ite_dbg("%s called", __func__);
1187
1188 /* disable the receiver interrupts */
1189 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
1190 ~(IT85_RDAIE | IT85_RFOIE),
1191 IT85_C0IER);
1192
1193 /* disable the receiver */
1194 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
1195 IT85_C0RCR);
1196
1197 /* clear the FIFO and RXACT (actually RXACT should have been cleared
1198 * in the previous it8709_wr(dev, ) call) */
1199 it8709_idle_rx(dev);
1200}
1201
1202/* enable the receiver; this must be called with the device spinlock held */
1203static void it8709_enable_rx(struct ite_dev *dev)
1204{
1205 ite_dbg("%s called", __func__);
1206
1207 /* enable the receiver by setting RXEN */
1208 it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
1209 IT85_C0RCR);
1210
1211 /* just prepare it to idle for the next reception */
1212 it8709_idle_rx(dev);
1213
1214 /* enable the receiver interrupts and master enable flag */
1215 it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1216 |IT85_RDAIE | IT85_RFOIE | IT85_IEC,
1217 IT85_C0IER);
1218}
1219
1220/* disable the transmitter interrupt; this must be called with the device
1221 * spinlock held */
1222static void it8709_disable_tx_interrupt(struct ite_dev *dev)
1223{
1224 ite_dbg("%s called", __func__);
1225
1226 /* disable the transmitter interrupts */
1227 it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
1228 IT85_C0IER);
1229}
1230
1231/* enable the transmitter interrupt; this must be called with the device
1232 * spinlock held */
1233static void it8709_enable_tx_interrupt(struct ite_dev *dev)
1234{
1235 ite_dbg("%s called", __func__);
1236
1237 /* enable the transmitter interrupts and master enable flag */
1238 it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
1239 |IT85_TLDLIE | IT85_IEC,
1240 IT85_C0IER);
1241}
1242
1243/* disable the device; this must be called with the device spinlock held */
1244static void it8709_disable(struct ite_dev *dev)
1245{
1246 ite_dbg("%s called", __func__);
1247
1248 /* clear out all interrupt enable flags */
1249 it8709_wr(dev,
1250 it8709_rr(dev,
1251 IT85_C0IER) & ~(IT85_IEC | IT85_RFOIE |
1252 IT85_RDAIE |
1253 IT85_TLDLIE), IT85_C0IER);
1254
1255 /* disable the receiver */
1256 it8709_disable_rx(dev);
1257
1258 /* erase the FIFO */
1259 it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
1260 IT85_C0MSTCR);
1261}
1262
1263/* initialize the hardware */
1264static void it8709_init_hardware(struct ite_dev *dev)
1265{
1266 ite_dbg("%s called", __func__);
1267
1268 /* disable all the interrupts */
1269 it8709_wr(dev,
1270 it8709_rr(dev,
1271 IT85_C0IER) & ~(IT85_IEC | IT85_RFOIE |
1272 IT85_RDAIE |
1273 IT85_TLDLIE), IT85_C0IER);
1274
1275 /* program the baud rate divisor */
1276 it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
1277 it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
1278 IT85_C0BDHR);
1279
1280 /* program the C0MSTCR register defaults */
1281 it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) & ~(IT85_ILSEL |
1282 IT85_ILE
1283 | IT85_FIFOTL
1284 |
1285 IT85_FIFOCLR
1286 |
1287 IT85_RESET))
1288 | IT85_FIFOTL_DEFAULT, IT85_C0MSTCR);
1289
1290 /* program the C0RCR register defaults */
1291 it8709_wr(dev,
1292 (it8709_rr(dev, IT85_C0RCR) &
1293 ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND
1294 | IT85_RXACT | IT85_RXDCR)) |
1295 ITE_RXDCR_DEFAULT, IT85_C0RCR);
1296
1297 /* program the C0TCR register defaults */
1298 it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR)
1299 &~(IT85_TXMPM | IT85_TXMPW))
1300 |IT85_TXRLE | IT85_TXENDF |
1301 IT85_TXMPM_DEFAULT |
1302 IT85_TXMPW_DEFAULT, IT85_C0TCR);
1303
1304 /* program the carrier parameters */
1305 ite_set_carrier_params(dev);
1306}
1307
1308
1309/* generic hardware setup/teardown code */
1310
1311/* activate the device for use */
1312static int ite_open(struct rc_dev *rcdev)
1313{
1314 struct ite_dev *dev = rcdev->priv;
1315 unsigned long flags;
1316
1317 ite_dbg("%s called", __func__);
1318
1319 spin_lock_irqsave(&dev->lock, flags);
1320 dev->in_use = true;
1321
1322 /* enable the receiver */
1323 dev->params.enable_rx(dev);
1324
1325 spin_unlock_irqrestore(&dev->lock, flags);
1326
1327 return 0;
1328}
1329
1330/* deactivate the device for use */
1331static void ite_close(struct rc_dev *rcdev)
1332{
1333 struct ite_dev *dev = rcdev->priv;
1334 unsigned long flags;
1335
1336 ite_dbg("%s called", __func__);
1337
1338 spin_lock_irqsave(&dev->lock, flags);
1339 dev->in_use = false;
1340
1341 /* wait for any transmission to end */
1342 spin_unlock_irqrestore(&dev->lock, flags);
1343 wait_event_interruptible(dev->tx_ended, !dev->transmitting);
1344 spin_lock_irqsave(&dev->lock, flags);
1345
1346 dev->params.disable(dev);
1347
1348 spin_unlock_irqrestore(&dev->lock, flags);
1349}
1350
1351/* supported models and their parameters */
1352static const struct ite_dev_params ite_dev_descs[] = {
1353 { /* 0: ITE8704 */
1354 .model = "ITE8704 CIR transceiver",
1355 .io_region_size = IT87_IOREG_LENGTH,
1356 .hw_tx_capable = true,
1357 .sample_period = (u32) (1000000000ULL / 115200),
1358 .tx_carrier_freq = 38000,
1359 .tx_duty_cycle = 33,
1360 .rx_low_carrier_freq = 0,
1361 .rx_high_carrier_freq = 0,
1362
1363 /* operations */
1364 .get_irq_causes = it87_get_irq_causes,
1365 .enable_rx = it87_enable_rx,
1366 .idle_rx = it87_idle_rx,
1367 .disable_rx = it87_idle_rx,
1368 .get_rx_bytes = it87_get_rx_bytes,
1369 .enable_tx_interrupt = it87_enable_tx_interrupt,
1370 .disable_tx_interrupt = it87_disable_tx_interrupt,
1371 .get_tx_used_slots = it87_get_tx_used_slots,
1372 .put_tx_byte = it87_put_tx_byte,
1373 .disable = it87_disable,
1374 .init_hardware = it87_init_hardware,
1375 .set_carrier_params = it87_set_carrier_params,
1376 },
1377 { /* 1: ITE8713 */
1378 .model = "ITE8713 CIR transceiver",
1379 .io_region_size = IT87_IOREG_LENGTH,
1380 .hw_tx_capable = true,
1381 .sample_period = (u32) (1000000000ULL / 115200),
1382 .tx_carrier_freq = 38000,
1383 .tx_duty_cycle = 33,
1384 .rx_low_carrier_freq = 0,
1385 .rx_high_carrier_freq = 0,
1386
1387 /* operations */
1388 .get_irq_causes = it87_get_irq_causes,
1389 .enable_rx = it87_enable_rx,
1390 .idle_rx = it87_idle_rx,
1391 .disable_rx = it87_idle_rx,
1392 .get_rx_bytes = it87_get_rx_bytes,
1393 .enable_tx_interrupt = it87_enable_tx_interrupt,
1394 .disable_tx_interrupt = it87_disable_tx_interrupt,
1395 .get_tx_used_slots = it87_get_tx_used_slots,
1396 .put_tx_byte = it87_put_tx_byte,
1397 .disable = it87_disable,
1398 .init_hardware = it87_init_hardware,
1399 .set_carrier_params = it87_set_carrier_params,
1400 },
1401 { /* 2: ITE8708 */
1402 .model = "ITE8708 CIR transceiver",
1403 .io_region_size = IT8708_IOREG_LENGTH,
1404 .hw_tx_capable = true,
1405 .sample_period = (u32) (1000000000ULL / 115200),
1406 .tx_carrier_freq = 38000,
1407 .tx_duty_cycle = 33,
1408 .rx_low_carrier_freq = 0,
1409 .rx_high_carrier_freq = 0,
1410
1411 /* operations */
1412 .get_irq_causes = it8708_get_irq_causes,
1413 .enable_rx = it8708_enable_rx,
1414 .idle_rx = it8708_idle_rx,
1415 .disable_rx = it8708_idle_rx,
1416 .get_rx_bytes = it8708_get_rx_bytes,
1417 .enable_tx_interrupt = it8708_enable_tx_interrupt,
1418 .disable_tx_interrupt =
1419 it8708_disable_tx_interrupt,
1420 .get_tx_used_slots = it8708_get_tx_used_slots,
1421 .put_tx_byte = it8708_put_tx_byte,
1422 .disable = it8708_disable,
1423 .init_hardware = it8708_init_hardware,
1424 .set_carrier_params = it8708_set_carrier_params,
1425 },
1426 { /* 3: ITE8709 */
1427 .model = "ITE8709 CIR transceiver",
1428 .io_region_size = IT8709_IOREG_LENGTH,
1429 .hw_tx_capable = true,
1430 .sample_period = (u32) (1000000000ULL / 115200),
1431 .tx_carrier_freq = 38000,
1432 .tx_duty_cycle = 33,
1433 .rx_low_carrier_freq = 0,
1434 .rx_high_carrier_freq = 0,
1435
1436 /* operations */
1437 .get_irq_causes = it8709_get_irq_causes,
1438 .enable_rx = it8709_enable_rx,
1439 .idle_rx = it8709_idle_rx,
1440 .disable_rx = it8709_idle_rx,
1441 .get_rx_bytes = it8709_get_rx_bytes,
1442 .enable_tx_interrupt = it8709_enable_tx_interrupt,
1443 .disable_tx_interrupt =
1444 it8709_disable_tx_interrupt,
1445 .get_tx_used_slots = it8709_get_tx_used_slots,
1446 .put_tx_byte = it8709_put_tx_byte,
1447 .disable = it8709_disable,
1448 .init_hardware = it8709_init_hardware,
1449 .set_carrier_params = it8709_set_carrier_params,
1450 },
1451};
1452
1453static const struct pnp_device_id ite_ids[] = {
1454 {"ITE8704", 0}, /* Default model */
1455 {"ITE8713", 1}, /* CIR found in EEEBox 1501U */
1456 {"ITE8708", 2}, /* Bridged IT8512 */
1457 {"ITE8709", 3}, /* SRAM-Bridged IT8512 */
1458 {"", 0},
1459};
1460
1461/* allocate memory, probe hardware, and initialize everything */
1462static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id
1463 *dev_id)
1464{
1465 const struct ite_dev_params *dev_desc = NULL;
1466 struct ite_dev *itdev = NULL;
1467 struct rc_dev *rdev = NULL;
1468 int ret = -ENOMEM;
1469 int model_no;
1470
1471 ite_dbg("%s called", __func__);
1472
1473 itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL);
1474 if (!itdev)
1475 return ret;
1476
1477 /* input device for IR remote (and tx) */
1478 rdev = rc_allocate_device();
1479 if (!rdev)
1480 goto failure;
1481
1482 ret = -ENODEV;
1483
1484 /* get the model number */
1485 model_no = (int)dev_id->driver_data;
1486 ite_pr(KERN_NOTICE, "Auto-detected model: %s\n",
1487 ite_dev_descs[model_no].model);
1488
1489 if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) {
1490 model_no = model_number;
1491 ite_pr(KERN_NOTICE, "The model has been fixed by a module "
1492 "parameter.");
1493 }
1494
1495 ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model);
1496
1497 /* get the description for the device */
1498 dev_desc = &ite_dev_descs[model_no];
1499
1500 /* validate pnp resources */
1501 if (!pnp_port_valid(pdev, 0) ||
1502 pnp_port_len(pdev, 0) != dev_desc->io_region_size) {
1503 dev_err(&pdev->dev, "IR PNP Port not valid!\n");
1504 goto failure;
1505 }
1506
1507 if (!pnp_irq_valid(pdev, 0)) {
1508 dev_err(&pdev->dev, "PNP IRQ not valid!\n");
1509 goto failure;
1510 }
1511
1512 /* store resource values */
1513 itdev->cir_addr = pnp_port_start(pdev, 0);
1514 itdev->cir_irq =pnp_irq(pdev, 0);
1515
1516 /* initialize spinlocks */
1517 spin_lock_init(&itdev->lock);
1518
1519 /* initialize raw event */
1520 init_ir_raw_event(&itdev->rawir);
1521
1522 ret = -EBUSY;
1523 /* now claim resources */
1524 if (!request_region(itdev->cir_addr,
1525 dev_desc->io_region_size, ITE_DRIVER_NAME))
1526 goto failure;
1527
1528 if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
1529 ITE_DRIVER_NAME, (void *)itdev))
1530 goto failure;
1531
1532 /* set driver data into the pnp device */
1533 pnp_set_drvdata(pdev, itdev);
1534 itdev->pdev = pdev;
1535
1536 /* initialize waitqueues for transmission */
1537 init_waitqueue_head(&itdev->tx_queue);
1538 init_waitqueue_head(&itdev->tx_ended);
1539
1540 /* copy model-specific parameters */
1541 itdev->params = *dev_desc;
1542
1543 /* apply any overrides */
1544 if (sample_period > 0)
1545 itdev->params.sample_period = sample_period;
1546
1547 if (tx_carrier_freq > 0)
1548 itdev->params.tx_carrier_freq = tx_carrier_freq;
1549
1550 if (tx_duty_cycle > 0 && tx_duty_cycle <= 100)
1551 itdev->params.tx_duty_cycle = tx_duty_cycle;
1552
1553 if (rx_low_carrier_freq > 0)
1554 itdev->params.rx_low_carrier_freq = rx_low_carrier_freq;
1555
1556 if (rx_high_carrier_freq > 0)
1557 itdev->params.rx_high_carrier_freq = rx_high_carrier_freq;
1558
1559 /* print out parameters */
1560 ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int)
1561 itdev->params.hw_tx_capable);
1562 ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long)
1563 itdev->params.sample_period);
1564 ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int)
1565 itdev->params.tx_carrier_freq);
1566 ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int)
1567 itdev->params.tx_duty_cycle);
1568 ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int)
1569 itdev->params.rx_low_carrier_freq);
1570 ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int)
1571 itdev->params.rx_high_carrier_freq);
1572
1573 /* set up hardware initial state */
1574 itdev->params.init_hardware(itdev);
1575
1576 /* set up ir-core props */
1577 rdev->priv = itdev;
1578 rdev->driver_type = RC_DRIVER_IR_RAW;
1579 rdev->allowed_protos = RC_TYPE_ALL;
1580 rdev->open = ite_open;
1581 rdev->close = ite_close;
1582 rdev->s_idle = ite_s_idle;
1583 rdev->s_rx_carrier_range = ite_set_rx_carrier_range;
1584 rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT;
1585 rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT;
1586 rdev->timeout = ITE_IDLE_TIMEOUT;
1587 rdev->rx_resolution = ITE_BAUDRATE_DIVISOR *
1588 itdev->params.sample_period;
1589 rdev->tx_resolution = ITE_BAUDRATE_DIVISOR *
1590 itdev->params.sample_period;
1591
1592 /* set up transmitter related values if needed */
1593 if (itdev->params.hw_tx_capable) {
1594 rdev->tx_ir = ite_tx_ir;
1595 rdev->s_tx_carrier = ite_set_tx_carrier;
1596 rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle;
1597 }
1598
1599 rdev->input_name = dev_desc->model;
1600 rdev->input_id.bustype = BUS_HOST;
1601 rdev->input_id.vendor = PCI_VENDOR_ID_ITE;
1602 rdev->input_id.product = 0;
1603 rdev->input_id.version = 0;
1604 rdev->driver_name = ITE_DRIVER_NAME;
1605 rdev->map_name = RC_MAP_RC6_MCE;
1606
1607 ret = rc_register_device(rdev);
1608 if (ret)
1609 goto failure;
1610
1611 itdev->rdev = rdev;
1612 ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
1613
1614 return 0;
1615
1616failure:
1617 if (itdev->cir_irq)
1618 free_irq(itdev->cir_irq, itdev);
1619
1620 if (itdev->cir_addr)
1621 release_region(itdev->cir_addr, itdev->params.io_region_size);
1622
1623 rc_free_device(rdev);
1624 kfree(itdev);
1625
1626 return ret;
1627}
1628
1629static void __devexit ite_remove(struct pnp_dev *pdev)
1630{
1631 struct ite_dev *dev = pnp_get_drvdata(pdev);
1632 unsigned long flags;
1633
1634 ite_dbg("%s called", __func__);
1635
1636 spin_lock_irqsave(&dev->lock, flags);
1637
1638 /* disable hardware */
1639 dev->params.disable(dev);
1640
1641 spin_unlock_irqrestore(&dev->lock, flags);
1642
1643 /* free resources */
1644 free_irq(dev->cir_irq, dev);
1645 release_region(dev->cir_addr, dev->params.io_region_size);
1646
1647 rc_unregister_device(dev->rdev);
1648
1649 kfree(dev);
1650}
1651
1652static int ite_suspend(struct pnp_dev *pdev, pm_message_t state)
1653{
1654 struct ite_dev *dev = pnp_get_drvdata(pdev);
1655 unsigned long flags;
1656
1657 ite_dbg("%s called", __func__);
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
1669static 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 if (dev->transmitting) {
1680 /* wake up the transmitter */
1681 wake_up_interruptible(&dev->tx_queue);
1682 } else {
1683 /* enable the receiver */
1684 dev->params.enable_rx(dev);
1685 }
1686
1687 spin_unlock_irqrestore(&dev->lock, flags);
1688
1689 return ret;
1690}
1691
1692static void ite_shutdown(struct pnp_dev *pdev)
1693{
1694 struct ite_dev *dev = pnp_get_drvdata(pdev);
1695 unsigned long flags;
1696
1697 ite_dbg("%s called", __func__);
1698
1699 spin_lock_irqsave(&dev->lock, flags);
1700
1701 /* disable all interrupts */
1702 dev->params.disable(dev);
1703
1704 spin_unlock_irqrestore(&dev->lock, flags);
1705}
1706
1707static struct pnp_driver ite_driver = {
1708 .name = ITE_DRIVER_NAME,
1709 .id_table = ite_ids,
1710 .probe = ite_probe,
1711 .remove = __devexit_p(ite_remove),
1712 .suspend = ite_suspend,
1713 .resume = ite_resume,
1714 .shutdown = ite_shutdown,
1715};
1716
1717int ite_init(void)
1718{
1719 return pnp_register_driver(&ite_driver);
1720}
1721
1722void ite_exit(void)
1723{
1724 pnp_unregister_driver(&ite_driver);
1725}
1726
1727MODULE_DEVICE_TABLE(pnp, ite_ids);
1728MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
1729
1730MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
1731MODULE_LICENSE("GPL");
1732
1733module_init(ite_init);
1734module_exit(ite_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-16 13:36:10 -0500