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620a32bb JGS |
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> | |
d7516c7c | 39 | #include <linux/delay.h> |
620a32bb JGS |
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 | ||
46 | #include "ite-cir.h" | |
47 | ||
48 | /* module parameters */ | |
49 | ||
50 | /* debug level */ | |
51 | static int debug; | |
52 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
53 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
54 | ||
55 | /* low limit for RX carrier freq, Hz, 0 for no RX demodulation */ | |
56 | static int rx_low_carrier_freq; | |
57 | module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR); | |
58 | MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, " | |
59 | "0 for no RX demodulation"); | |
60 | ||
61 | /* high limit for RX carrier freq, Hz, 0 for no RX demodulation */ | |
62 | static int rx_high_carrier_freq; | |
63 | module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR); | |
64 | MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, " | |
65 | "Hz, 0 for no RX demodulation"); | |
66 | ||
67 | /* override tx carrier frequency */ | |
68 | static int tx_carrier_freq; | |
69 | module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR); | |
70 | MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz"); | |
71 | ||
72 | /* override tx duty cycle */ | |
73 | static int tx_duty_cycle; | |
74 | module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR); | |
75 | MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100"); | |
76 | ||
77 | /* override default sample period */ | |
78 | static long sample_period; | |
79 | module_param(sample_period, long, S_IRUGO | S_IWUSR); | |
80 | MODULE_PARM_DESC(sample_period, "Override carrier sample period, us"); | |
81 | ||
82 | /* override detected model id */ | |
83 | static int model_number = -1; | |
84 | module_param(model_number, int, S_IRUGO | S_IWUSR); | |
85 | MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect"); | |
86 | ||
87 | ||
88 | /* HW-independent code functions */ | |
89 | ||
90 | /* check whether carrier frequency is high frequency */ | |
91 | static inline bool ite_is_high_carrier_freq(unsigned int freq) | |
92 | { | |
93 | return freq >= ITE_HCF_MIN_CARRIER_FREQ; | |
94 | } | |
95 | ||
96 | /* get the bits required to program the carrier frequency in CFQ bits, | |
97 | * unshifted */ | |
98 | static u8 ite_get_carrier_freq_bits(unsigned int freq) | |
99 | { | |
100 | if (ite_is_high_carrier_freq(freq)) { | |
101 | if (freq < 425000) | |
102 | return ITE_CFQ_400; | |
103 | ||
104 | else if (freq < 465000) | |
105 | return ITE_CFQ_450; | |
106 | ||
107 | else if (freq < 490000) | |
108 | return ITE_CFQ_480; | |
109 | ||
110 | else | |
111 | return ITE_CFQ_500; | |
112 | } else { | |
113 | /* trim to limits */ | |
114 | if (freq < ITE_LCF_MIN_CARRIER_FREQ) | |
115 | freq = ITE_LCF_MIN_CARRIER_FREQ; | |
116 | if (freq > ITE_LCF_MAX_CARRIER_FREQ) | |
117 | freq = ITE_LCF_MAX_CARRIER_FREQ; | |
118 | ||
119 | /* convert to kHz and subtract the base freq */ | |
120 | freq = | |
121 | DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ, | |
122 | 1000); | |
123 | ||
124 | return (u8) freq; | |
125 | } | |
126 | } | |
127 | ||
128 | /* get the bits required to program the pulse with in TXMPW */ | |
129 | static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle) | |
130 | { | |
131 | unsigned long period_ns, on_ns; | |
132 | ||
133 | /* sanitize freq into range */ | |
134 | if (freq < ITE_LCF_MIN_CARRIER_FREQ) | |
135 | freq = ITE_LCF_MIN_CARRIER_FREQ; | |
136 | if (freq > ITE_HCF_MAX_CARRIER_FREQ) | |
137 | freq = ITE_HCF_MAX_CARRIER_FREQ; | |
138 | ||
139 | period_ns = 1000000000UL / freq; | |
140 | on_ns = period_ns * duty_cycle / 100; | |
141 | ||
142 | if (ite_is_high_carrier_freq(freq)) { | |
143 | if (on_ns < 750) | |
144 | return ITE_TXMPW_A; | |
145 | ||
146 | else if (on_ns < 850) | |
147 | return ITE_TXMPW_B; | |
148 | ||
149 | else if (on_ns < 950) | |
150 | return ITE_TXMPW_C; | |
151 | ||
152 | else if (on_ns < 1080) | |
153 | return ITE_TXMPW_D; | |
154 | ||
155 | else | |
156 | return ITE_TXMPW_E; | |
157 | } else { | |
158 | if (on_ns < 6500) | |
159 | return ITE_TXMPW_A; | |
160 | ||
161 | else if (on_ns < 7850) | |
162 | return ITE_TXMPW_B; | |
163 | ||
164 | else if (on_ns < 9650) | |
165 | return ITE_TXMPW_C; | |
166 | ||
167 | else if (on_ns < 11950) | |
168 | return ITE_TXMPW_D; | |
169 | ||
170 | else | |
171 | return ITE_TXMPW_E; | |
172 | } | |
173 | } | |
174 | ||
175 | /* decode raw bytes as received by the hardware, and push them to the ir-core | |
176 | * layer */ | |
177 | static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int | |
178 | length) | |
179 | { | |
180 | u32 sample_period; | |
181 | unsigned long *ldata; | |
182 | unsigned int next_one, next_zero, size; | |
183 | DEFINE_IR_RAW_EVENT(ev); | |
184 | ||
185 | if (length == 0) | |
186 | return; | |
187 | ||
188 | sample_period = dev->params.sample_period; | |
189 | ldata = (unsigned long *)data; | |
190 | size = length << 3; | |
30f5b28e | 191 | next_one = find_next_bit_le(ldata, size, 0); |
620a32bb JGS |
192 | if (next_one > 0) { |
193 | ev.pulse = true; | |
194 | ev.duration = | |
195 | ITE_BITS_TO_NS(next_one, sample_period); | |
196 | ir_raw_event_store_with_filter(dev->rdev, &ev); | |
197 | } | |
198 | ||
199 | while (next_one < size) { | |
30f5b28e | 200 | next_zero = find_next_zero_bit_le(ldata, size, next_one + 1); |
620a32bb JGS |
201 | ev.pulse = false; |
202 | ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period); | |
203 | ir_raw_event_store_with_filter(dev->rdev, &ev); | |
204 | ||
205 | if (next_zero < size) { | |
206 | next_one = | |
30f5b28e | 207 | find_next_bit_le(ldata, |
620a32bb JGS |
208 | size, |
209 | next_zero + 1); | |
210 | ev.pulse = true; | |
211 | ev.duration = | |
212 | ITE_BITS_TO_NS(next_one - next_zero, | |
213 | sample_period); | |
214 | ir_raw_event_store_with_filter | |
215 | (dev->rdev, &ev); | |
216 | } else | |
217 | next_one = size; | |
218 | } | |
219 | ||
220 | ir_raw_event_handle(dev->rdev); | |
221 | ||
222 | ite_dbg_verbose("decoded %d bytes.", length); | |
223 | } | |
224 | ||
225 | /* set all the rx/tx carrier parameters; this must be called with the device | |
226 | * spinlock held */ | |
227 | static void ite_set_carrier_params(struct ite_dev *dev) | |
228 | { | |
229 | unsigned int freq, low_freq, high_freq; | |
230 | int allowance; | |
231 | bool use_demodulator; | |
232 | bool for_tx = dev->transmitting; | |
233 | ||
234 | ite_dbg("%s called", __func__); | |
235 | ||
236 | if (for_tx) { | |
237 | /* we don't need no stinking calculations */ | |
238 | freq = dev->params.tx_carrier_freq; | |
239 | allowance = ITE_RXDCR_DEFAULT; | |
240 | use_demodulator = false; | |
241 | } else { | |
242 | low_freq = dev->params.rx_low_carrier_freq; | |
243 | high_freq = dev->params.rx_high_carrier_freq; | |
244 | ||
245 | if (low_freq == 0) { | |
246 | /* don't demodulate */ | |
247 | freq = | |
248 | ITE_DEFAULT_CARRIER_FREQ; | |
249 | allowance = ITE_RXDCR_DEFAULT; | |
250 | use_demodulator = false; | |
251 | } else { | |
252 | /* calculate the middle freq */ | |
253 | freq = (low_freq + high_freq) / 2; | |
254 | ||
255 | /* calculate the allowance */ | |
256 | allowance = | |
257 | DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq), | |
258 | ITE_RXDCR_PER_10000_STEP | |
259 | * (high_freq + low_freq)); | |
260 | ||
261 | if (allowance < 1) | |
262 | allowance = 1; | |
263 | ||
264 | if (allowance > ITE_RXDCR_MAX) | |
265 | allowance = ITE_RXDCR_MAX; | |
266 | } | |
267 | } | |
268 | ||
269 | /* set the carrier parameters in a device-dependent way */ | |
270 | dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq), | |
271 | use_demodulator, ite_get_carrier_freq_bits(freq), allowance, | |
272 | ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle)); | |
273 | } | |
274 | ||
275 | /* interrupt service routine for incoming and outgoing CIR data */ | |
276 | static irqreturn_t ite_cir_isr(int irq, void *data) | |
277 | { | |
278 | struct ite_dev *dev = data; | |
279 | unsigned long flags; | |
280 | irqreturn_t ret = IRQ_RETVAL(IRQ_NONE); | |
281 | u8 rx_buf[ITE_RX_FIFO_LEN]; | |
282 | int rx_bytes; | |
283 | int iflags; | |
284 | ||
285 | ite_dbg_verbose("%s firing", __func__); | |
286 | ||
287 | /* grab the spinlock */ | |
288 | spin_lock_irqsave(&dev->lock, flags); | |
289 | ||
290 | /* read the interrupt flags */ | |
291 | iflags = dev->params.get_irq_causes(dev); | |
292 | ||
293 | /* check for the receive interrupt */ | |
294 | if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) { | |
295 | /* read the FIFO bytes */ | |
296 | rx_bytes = | |
297 | dev->params.get_rx_bytes(dev, rx_buf, | |
298 | ITE_RX_FIFO_LEN); | |
299 | ||
300 | if (rx_bytes > 0) { | |
301 | /* drop the spinlock, since the ir-core layer | |
302 | * may call us back again through | |
303 | * ite_s_idle() */ | |
304 | spin_unlock_irqrestore(&dev-> | |
305 | lock, | |
306 | flags); | |
307 | ||
308 | /* decode the data we've just received */ | |
309 | ite_decode_bytes(dev, rx_buf, | |
310 | rx_bytes); | |
311 | ||
312 | /* reacquire the spinlock */ | |
313 | spin_lock_irqsave(&dev->lock, | |
314 | flags); | |
315 | ||
316 | /* mark the interrupt as serviced */ | |
317 | ret = IRQ_RETVAL(IRQ_HANDLED); | |
318 | } | |
319 | } else if (iflags & ITE_IRQ_TX_FIFO) { | |
320 | /* FIFO space available interrupt */ | |
321 | ite_dbg_verbose("got interrupt for TX FIFO"); | |
322 | ||
323 | /* wake any sleeping transmitter */ | |
324 | wake_up_interruptible(&dev->tx_queue); | |
325 | ||
326 | /* mark the interrupt as serviced */ | |
327 | ret = IRQ_RETVAL(IRQ_HANDLED); | |
328 | } | |
329 | ||
330 | /* drop the spinlock */ | |
331 | spin_unlock_irqrestore(&dev->lock, flags); | |
332 | ||
333 | ite_dbg_verbose("%s done returning %d", __func__, (int)ret); | |
334 | ||
335 | return ret; | |
336 | } | |
337 | ||
338 | /* set the rx carrier freq range, guess it's in Hz... */ | |
339 | static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32 | |
340 | carrier_high) | |
341 | { | |
342 | unsigned long flags; | |
343 | struct ite_dev *dev = rcdev->priv; | |
344 | ||
345 | spin_lock_irqsave(&dev->lock, flags); | |
346 | dev->params.rx_low_carrier_freq = carrier_low; | |
347 | dev->params.rx_high_carrier_freq = carrier_high; | |
348 | ite_set_carrier_params(dev); | |
349 | spin_unlock_irqrestore(&dev->lock, flags); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | /* set the tx carrier freq, guess it's in Hz... */ | |
355 | static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier) | |
356 | { | |
357 | unsigned long flags; | |
358 | struct ite_dev *dev = rcdev->priv; | |
359 | ||
360 | spin_lock_irqsave(&dev->lock, flags); | |
361 | dev->params.tx_carrier_freq = carrier; | |
362 | ite_set_carrier_params(dev); | |
363 | spin_unlock_irqrestore(&dev->lock, flags); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | /* set the tx duty cycle by controlling the pulse width */ | |
369 | static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle) | |
370 | { | |
371 | unsigned long flags; | |
372 | struct ite_dev *dev = rcdev->priv; | |
373 | ||
374 | spin_lock_irqsave(&dev->lock, flags); | |
375 | dev->params.tx_duty_cycle = duty_cycle; | |
376 | ite_set_carrier_params(dev); | |
377 | spin_unlock_irqrestore(&dev->lock, flags); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | /* transmit out IR pulses; what you get here is a batch of alternating | |
383 | * pulse/space/pulse/space lengths that we should write out completely through | |
384 | * the FIFO, blocking on a full FIFO */ | |
5588dc2b | 385 | static int ite_tx_ir(struct rc_dev *rcdev, unsigned *txbuf, unsigned n) |
620a32bb JGS |
386 | { |
387 | unsigned long flags; | |
388 | struct ite_dev *dev = rcdev->priv; | |
389 | bool is_pulse = false; | |
390 | int remaining_us, fifo_avail, fifo_remaining, last_idx = 0; | |
391 | int max_rle_us, next_rle_us; | |
392 | int ret = n; | |
393 | u8 last_sent[ITE_TX_FIFO_LEN]; | |
394 | u8 val; | |
395 | ||
396 | ite_dbg("%s called", __func__); | |
397 | ||
398 | /* clear the array just in case */ | |
399 | memset(last_sent, 0, ARRAY_SIZE(last_sent)); | |
400 | ||
620a32bb JGS |
401 | spin_lock_irqsave(&dev->lock, flags); |
402 | ||
403 | /* let everybody know we're now transmitting */ | |
404 | dev->transmitting = true; | |
405 | ||
406 | /* and set the carrier values for transmission */ | |
407 | ite_set_carrier_params(dev); | |
408 | ||
409 | /* calculate how much time we can send in one byte */ | |
410 | max_rle_us = | |
411 | (ITE_BAUDRATE_DIVISOR * dev->params.sample_period * | |
412 | ITE_TX_MAX_RLE) / 1000; | |
413 | ||
414 | /* disable the receiver */ | |
415 | dev->params.disable_rx(dev); | |
416 | ||
417 | /* this is where we'll begin filling in the FIFO, until it's full. | |
418 | * then we'll just activate the interrupt, wait for it to wake us up | |
419 | * again, disable it, continue filling the FIFO... until everything | |
420 | * has been pushed out */ | |
421 | fifo_avail = | |
422 | ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev); | |
423 | ||
424 | while (n > 0 && dev->in_use) { | |
425 | /* transmit the next sample */ | |
426 | is_pulse = !is_pulse; | |
427 | remaining_us = *(txbuf++); | |
428 | n--; | |
429 | ||
430 | ite_dbg("%s: %ld", | |
431 | ((is_pulse) ? "pulse" : "space"), | |
432 | (long int) | |
433 | remaining_us); | |
434 | ||
435 | /* repeat while the pulse is non-zero length */ | |
436 | while (remaining_us > 0 && dev->in_use) { | |
437 | if (remaining_us > max_rle_us) | |
438 | next_rle_us = max_rle_us; | |
439 | ||
440 | else | |
441 | next_rle_us = remaining_us; | |
442 | ||
443 | remaining_us -= next_rle_us; | |
444 | ||
445 | /* check what's the length we have to pump out */ | |
446 | val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us; | |
447 | ||
448 | /* put it into the sent buffer */ | |
449 | last_sent[last_idx++] = val; | |
450 | last_idx &= (ITE_TX_FIFO_LEN); | |
451 | ||
452 | /* encode it for 7 bits */ | |
453 | val = (val - 1) & ITE_TX_RLE_MASK; | |
454 | ||
455 | /* take into account pulse/space prefix */ | |
456 | if (is_pulse) | |
457 | val |= ITE_TX_PULSE; | |
458 | ||
459 | else | |
460 | val |= ITE_TX_SPACE; | |
461 | ||
2ccb24ff MCC |
462 | /* |
463 | * if we get to 0 available, read again, just in case | |
464 | * some other slot got freed | |
465 | */ | |
620a32bb JGS |
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 */ | |
536 | static 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 | * */ | |
556 | static 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 */ | |
582 | static 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 */ | |
612 | static 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 */ | |
634 | static 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 */ | |
642 | static 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 */ | |
649 | static 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 */ | |
663 | static 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 */ | |
681 | static 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 */ | |
699 | static 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 */ | |
710 | static 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 */ | |
720 | static 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 */ | |
738 | static 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 | * */ | |
773 | static 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 */ | |
794 | static 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 */ | |
837 | static 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 */ | |
859 | static 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 */ | |
867 | static 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 */ | |
874 | static 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 */ | |
888 | static 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 */ | |
907 | static 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 */ | |
926 | static 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 */ | |
937 | static 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 */ | |
948 | static 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 */ | |
966 | static 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 */ | |
1014 | static 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 */ | |
1021 | static 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 | ||
1027 | static 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 */ | |
1042 | static 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 */ | |
1057 | static 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 | * */ | |
1070 | static 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 */ | |
1091 | static 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 */ | |
1128 | static 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 */ | |
1155 | static 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 */ | |
1163 | static 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 */ | |
1170 | static 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 */ | |
1184 | static 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 */ | |
1203 | static 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 */ | |
1222 | static 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 */ | |
1233 | static 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 */ | |
1244 | static void it8709_disable(struct ite_dev *dev) | |
1245 | { | |
1246 | ite_dbg("%s called", __func__); | |
1247 | ||
1248 | /* clear out all interrupt enable flags */ | |
f0c1629d JW |
1249 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
1250 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), | |
1251 | IT85_C0IER); | |
620a32bb JGS |
1252 | |
1253 | /* disable the receiver */ | |
1254 | it8709_disable_rx(dev); | |
1255 | ||
1256 | /* erase the FIFO */ | |
1257 | it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR), | |
1258 | IT85_C0MSTCR); | |
1259 | } | |
1260 | ||
1261 | /* initialize the hardware */ | |
1262 | static void it8709_init_hardware(struct ite_dev *dev) | |
1263 | { | |
1264 | ite_dbg("%s called", __func__); | |
1265 | ||
1266 | /* disable all the interrupts */ | |
f0c1629d JW |
1267 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
1268 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), | |
1269 | IT85_C0IER); | |
620a32bb JGS |
1270 | |
1271 | /* program the baud rate divisor */ | |
1272 | it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR); | |
1273 | it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff, | |
1274 | IT85_C0BDHR); | |
1275 | ||
1276 | /* program the C0MSTCR register defaults */ | |
f0c1629d JW |
1277 | it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) & |
1278 | ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL | |
1279 | | IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT, | |
1280 | IT85_C0MSTCR); | |
620a32bb JGS |
1281 | |
1282 | /* program the C0RCR register defaults */ | |
f0c1629d JW |
1283 | it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) & |
1284 | ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT | |
1285 | | IT85_RXDCR)) | ITE_RXDCR_DEFAULT, | |
1286 | IT85_C0RCR); | |
620a32bb JGS |
1287 | |
1288 | /* program the C0TCR register defaults */ | |
f0c1629d JW |
1289 | it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW)) |
1290 | | IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT | |
1291 | | IT85_TXMPW_DEFAULT, | |
1292 | IT85_C0TCR); | |
620a32bb JGS |
1293 | |
1294 | /* program the carrier parameters */ | |
1295 | ite_set_carrier_params(dev); | |
1296 | } | |
1297 | ||
1298 | ||
1299 | /* generic hardware setup/teardown code */ | |
1300 | ||
1301 | /* activate the device for use */ | |
1302 | static int ite_open(struct rc_dev *rcdev) | |
1303 | { | |
1304 | struct ite_dev *dev = rcdev->priv; | |
1305 | unsigned long flags; | |
1306 | ||
1307 | ite_dbg("%s called", __func__); | |
1308 | ||
1309 | spin_lock_irqsave(&dev->lock, flags); | |
1310 | dev->in_use = true; | |
1311 | ||
1312 | /* enable the receiver */ | |
1313 | dev->params.enable_rx(dev); | |
1314 | ||
1315 | spin_unlock_irqrestore(&dev->lock, flags); | |
1316 | ||
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /* deactivate the device for use */ | |
1321 | static void ite_close(struct rc_dev *rcdev) | |
1322 | { | |
1323 | struct ite_dev *dev = rcdev->priv; | |
1324 | unsigned long flags; | |
1325 | ||
1326 | ite_dbg("%s called", __func__); | |
1327 | ||
1328 | spin_lock_irqsave(&dev->lock, flags); | |
1329 | dev->in_use = false; | |
1330 | ||
1331 | /* wait for any transmission to end */ | |
1332 | spin_unlock_irqrestore(&dev->lock, flags); | |
1333 | wait_event_interruptible(dev->tx_ended, !dev->transmitting); | |
1334 | spin_lock_irqsave(&dev->lock, flags); | |
1335 | ||
1336 | dev->params.disable(dev); | |
1337 | ||
1338 | spin_unlock_irqrestore(&dev->lock, flags); | |
1339 | } | |
1340 | ||
1341 | /* supported models and their parameters */ | |
1342 | static const struct ite_dev_params ite_dev_descs[] = { | |
1343 | { /* 0: ITE8704 */ | |
1344 | .model = "ITE8704 CIR transceiver", | |
1345 | .io_region_size = IT87_IOREG_LENGTH, | |
35d136c8 | 1346 | .io_rsrc_no = 0, |
620a32bb JGS |
1347 | .hw_tx_capable = true, |
1348 | .sample_period = (u32) (1000000000ULL / 115200), | |
1349 | .tx_carrier_freq = 38000, | |
1350 | .tx_duty_cycle = 33, | |
1351 | .rx_low_carrier_freq = 0, | |
1352 | .rx_high_carrier_freq = 0, | |
1353 | ||
1354 | /* operations */ | |
1355 | .get_irq_causes = it87_get_irq_causes, | |
1356 | .enable_rx = it87_enable_rx, | |
1357 | .idle_rx = it87_idle_rx, | |
1358 | .disable_rx = it87_idle_rx, | |
1359 | .get_rx_bytes = it87_get_rx_bytes, | |
1360 | .enable_tx_interrupt = it87_enable_tx_interrupt, | |
1361 | .disable_tx_interrupt = it87_disable_tx_interrupt, | |
1362 | .get_tx_used_slots = it87_get_tx_used_slots, | |
1363 | .put_tx_byte = it87_put_tx_byte, | |
1364 | .disable = it87_disable, | |
1365 | .init_hardware = it87_init_hardware, | |
1366 | .set_carrier_params = it87_set_carrier_params, | |
1367 | }, | |
1368 | { /* 1: ITE8713 */ | |
1369 | .model = "ITE8713 CIR transceiver", | |
1370 | .io_region_size = IT87_IOREG_LENGTH, | |
35d136c8 | 1371 | .io_rsrc_no = 0, |
620a32bb JGS |
1372 | .hw_tx_capable = true, |
1373 | .sample_period = (u32) (1000000000ULL / 115200), | |
1374 | .tx_carrier_freq = 38000, | |
1375 | .tx_duty_cycle = 33, | |
1376 | .rx_low_carrier_freq = 0, | |
1377 | .rx_high_carrier_freq = 0, | |
1378 | ||
1379 | /* operations */ | |
1380 | .get_irq_causes = it87_get_irq_causes, | |
1381 | .enable_rx = it87_enable_rx, | |
1382 | .idle_rx = it87_idle_rx, | |
1383 | .disable_rx = it87_idle_rx, | |
1384 | .get_rx_bytes = it87_get_rx_bytes, | |
1385 | .enable_tx_interrupt = it87_enable_tx_interrupt, | |
1386 | .disable_tx_interrupt = it87_disable_tx_interrupt, | |
1387 | .get_tx_used_slots = it87_get_tx_used_slots, | |
1388 | .put_tx_byte = it87_put_tx_byte, | |
1389 | .disable = it87_disable, | |
1390 | .init_hardware = it87_init_hardware, | |
1391 | .set_carrier_params = it87_set_carrier_params, | |
1392 | }, | |
1393 | { /* 2: ITE8708 */ | |
1394 | .model = "ITE8708 CIR transceiver", | |
1395 | .io_region_size = IT8708_IOREG_LENGTH, | |
35d136c8 | 1396 | .io_rsrc_no = 0, |
620a32bb JGS |
1397 | .hw_tx_capable = true, |
1398 | .sample_period = (u32) (1000000000ULL / 115200), | |
1399 | .tx_carrier_freq = 38000, | |
1400 | .tx_duty_cycle = 33, | |
1401 | .rx_low_carrier_freq = 0, | |
1402 | .rx_high_carrier_freq = 0, | |
1403 | ||
1404 | /* operations */ | |
1405 | .get_irq_causes = it8708_get_irq_causes, | |
1406 | .enable_rx = it8708_enable_rx, | |
1407 | .idle_rx = it8708_idle_rx, | |
1408 | .disable_rx = it8708_idle_rx, | |
1409 | .get_rx_bytes = it8708_get_rx_bytes, | |
1410 | .enable_tx_interrupt = it8708_enable_tx_interrupt, | |
1411 | .disable_tx_interrupt = | |
1412 | it8708_disable_tx_interrupt, | |
1413 | .get_tx_used_slots = it8708_get_tx_used_slots, | |
1414 | .put_tx_byte = it8708_put_tx_byte, | |
1415 | .disable = it8708_disable, | |
1416 | .init_hardware = it8708_init_hardware, | |
1417 | .set_carrier_params = it8708_set_carrier_params, | |
1418 | }, | |
1419 | { /* 3: ITE8709 */ | |
1420 | .model = "ITE8709 CIR transceiver", | |
1421 | .io_region_size = IT8709_IOREG_LENGTH, | |
35d136c8 | 1422 | .io_rsrc_no = 2, |
620a32bb JGS |
1423 | .hw_tx_capable = true, |
1424 | .sample_period = (u32) (1000000000ULL / 115200), | |
1425 | .tx_carrier_freq = 38000, | |
1426 | .tx_duty_cycle = 33, | |
1427 | .rx_low_carrier_freq = 0, | |
1428 | .rx_high_carrier_freq = 0, | |
1429 | ||
1430 | /* operations */ | |
1431 | .get_irq_causes = it8709_get_irq_causes, | |
1432 | .enable_rx = it8709_enable_rx, | |
1433 | .idle_rx = it8709_idle_rx, | |
1434 | .disable_rx = it8709_idle_rx, | |
1435 | .get_rx_bytes = it8709_get_rx_bytes, | |
1436 | .enable_tx_interrupt = it8709_enable_tx_interrupt, | |
1437 | .disable_tx_interrupt = | |
1438 | it8709_disable_tx_interrupt, | |
1439 | .get_tx_used_slots = it8709_get_tx_used_slots, | |
1440 | .put_tx_byte = it8709_put_tx_byte, | |
1441 | .disable = it8709_disable, | |
1442 | .init_hardware = it8709_init_hardware, | |
1443 | .set_carrier_params = it8709_set_carrier_params, | |
1444 | }, | |
1445 | }; | |
1446 | ||
1447 | static const struct pnp_device_id ite_ids[] = { | |
1448 | {"ITE8704", 0}, /* Default model */ | |
1449 | {"ITE8713", 1}, /* CIR found in EEEBox 1501U */ | |
1450 | {"ITE8708", 2}, /* Bridged IT8512 */ | |
1451 | {"ITE8709", 3}, /* SRAM-Bridged IT8512 */ | |
1452 | {"", 0}, | |
1453 | }; | |
1454 | ||
1455 | /* allocate memory, probe hardware, and initialize everything */ | |
1456 | static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id | |
1457 | *dev_id) | |
1458 | { | |
1459 | const struct ite_dev_params *dev_desc = NULL; | |
1460 | struct ite_dev *itdev = NULL; | |
1461 | struct rc_dev *rdev = NULL; | |
1462 | int ret = -ENOMEM; | |
1463 | int model_no; | |
35d136c8 | 1464 | int io_rsrc_no; |
620a32bb JGS |
1465 | |
1466 | ite_dbg("%s called", __func__); | |
1467 | ||
1468 | itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL); | |
1469 | if (!itdev) | |
1470 | return ret; | |
1471 | ||
1472 | /* input device for IR remote (and tx) */ | |
1473 | rdev = rc_allocate_device(); | |
1474 | if (!rdev) | |
70ef6991 | 1475 | goto exit_free_dev_rdev; |
4b961180 | 1476 | itdev->rdev = rdev; |
620a32bb JGS |
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]; | |
35d136c8 | 1495 | io_rsrc_no = dev_desc->io_rsrc_no; |
620a32bb JGS |
1496 | |
1497 | /* validate pnp resources */ | |
35d136c8 JW |
1498 | if (!pnp_port_valid(pdev, io_rsrc_no) || |
1499 | pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) { | |
620a32bb | 1500 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); |
70ef6991 | 1501 | goto exit_free_dev_rdev; |
620a32bb JGS |
1502 | } |
1503 | ||
1504 | if (!pnp_irq_valid(pdev, 0)) { | |
1505 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
70ef6991 | 1506 | goto exit_free_dev_rdev; |
620a32bb JGS |
1507 | } |
1508 | ||
1509 | /* store resource values */ | |
35d136c8 | 1510 | itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no); |
2ccb24ff | 1511 | itdev->cir_irq = pnp_irq(pdev, 0); |
620a32bb JGS |
1512 | |
1513 | /* initialize spinlocks */ | |
1514 | spin_lock_init(&itdev->lock); | |
1515 | ||
1516 | /* initialize raw event */ | |
1517 | init_ir_raw_event(&itdev->rawir); | |
1518 | ||
620a32bb JGS |
1519 | /* set driver data into the pnp device */ |
1520 | pnp_set_drvdata(pdev, itdev); | |
1521 | itdev->pdev = pdev; | |
1522 | ||
1523 | /* initialize waitqueues for transmission */ | |
1524 | init_waitqueue_head(&itdev->tx_queue); | |
1525 | init_waitqueue_head(&itdev->tx_ended); | |
1526 | ||
1527 | /* copy model-specific parameters */ | |
1528 | itdev->params = *dev_desc; | |
1529 | ||
1530 | /* apply any overrides */ | |
1531 | if (sample_period > 0) | |
1532 | itdev->params.sample_period = sample_period; | |
1533 | ||
1534 | if (tx_carrier_freq > 0) | |
1535 | itdev->params.tx_carrier_freq = tx_carrier_freq; | |
1536 | ||
1537 | if (tx_duty_cycle > 0 && tx_duty_cycle <= 100) | |
1538 | itdev->params.tx_duty_cycle = tx_duty_cycle; | |
1539 | ||
1540 | if (rx_low_carrier_freq > 0) | |
1541 | itdev->params.rx_low_carrier_freq = rx_low_carrier_freq; | |
1542 | ||
1543 | if (rx_high_carrier_freq > 0) | |
1544 | itdev->params.rx_high_carrier_freq = rx_high_carrier_freq; | |
1545 | ||
1546 | /* print out parameters */ | |
1547 | ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int) | |
1548 | itdev->params.hw_tx_capable); | |
1549 | ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long) | |
1550 | itdev->params.sample_period); | |
1551 | ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int) | |
1552 | itdev->params.tx_carrier_freq); | |
1553 | ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int) | |
1554 | itdev->params.tx_duty_cycle); | |
1555 | ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int) | |
1556 | itdev->params.rx_low_carrier_freq); | |
1557 | ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int) | |
1558 | itdev->params.rx_high_carrier_freq); | |
1559 | ||
1560 | /* set up hardware initial state */ | |
1561 | itdev->params.init_hardware(itdev); | |
1562 | ||
1563 | /* set up ir-core props */ | |
1564 | rdev->priv = itdev; | |
1565 | rdev->driver_type = RC_DRIVER_IR_RAW; | |
c5540fbb | 1566 | rdev->allowed_protocols = RC_BIT_ALL; |
620a32bb JGS |
1567 | rdev->open = ite_open; |
1568 | rdev->close = ite_close; | |
1569 | rdev->s_idle = ite_s_idle; | |
1570 | rdev->s_rx_carrier_range = ite_set_rx_carrier_range; | |
1571 | rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT; | |
1572 | rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT; | |
1573 | rdev->timeout = ITE_IDLE_TIMEOUT; | |
1574 | rdev->rx_resolution = ITE_BAUDRATE_DIVISOR * | |
1575 | itdev->params.sample_period; | |
1576 | rdev->tx_resolution = ITE_BAUDRATE_DIVISOR * | |
1577 | itdev->params.sample_period; | |
1578 | ||
1579 | /* set up transmitter related values if needed */ | |
1580 | if (itdev->params.hw_tx_capable) { | |
1581 | rdev->tx_ir = ite_tx_ir; | |
1582 | rdev->s_tx_carrier = ite_set_tx_carrier; | |
1583 | rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle; | |
1584 | } | |
1585 | ||
1586 | rdev->input_name = dev_desc->model; | |
1587 | rdev->input_id.bustype = BUS_HOST; | |
1588 | rdev->input_id.vendor = PCI_VENDOR_ID_ITE; | |
1589 | rdev->input_id.product = 0; | |
1590 | rdev->input_id.version = 0; | |
1591 | rdev->driver_name = ITE_DRIVER_NAME; | |
1592 | rdev->map_name = RC_MAP_RC6_MCE; | |
1593 | ||
9fa35204 MK |
1594 | ret = rc_register_device(rdev); |
1595 | if (ret) | |
1596 | goto exit_free_dev_rdev; | |
1597 | ||
9ef449c6 LH |
1598 | ret = -EBUSY; |
1599 | /* now claim resources */ | |
1600 | if (!request_region(itdev->cir_addr, | |
1601 | dev_desc->io_region_size, ITE_DRIVER_NAME)) | |
9fa35204 | 1602 | goto exit_unregister_device; |
9ef449c6 LH |
1603 | |
1604 | if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED, | |
1605 | ITE_DRIVER_NAME, (void *)itdev)) | |
70ef6991 | 1606 | goto exit_release_cir_addr; |
9ef449c6 | 1607 | |
620a32bb JGS |
1608 | ite_pr(KERN_NOTICE, "driver has been successfully loaded\n"); |
1609 | ||
1610 | return 0; | |
1611 | ||
70ef6991 | 1612 | exit_release_cir_addr: |
f27b853e | 1613 | release_region(itdev->cir_addr, itdev->params.io_region_size); |
9fa35204 MK |
1614 | exit_unregister_device: |
1615 | rc_unregister_device(rdev); | |
408208fb | 1616 | rdev = NULL; |
70ef6991 | 1617 | exit_free_dev_rdev: |
620a32bb JGS |
1618 | rc_free_device(rdev); |
1619 | kfree(itdev); | |
1620 | ||
1621 | return ret; | |
1622 | } | |
1623 | ||
4c62e976 | 1624 | static void ite_remove(struct pnp_dev *pdev) |
620a32bb JGS |
1625 | { |
1626 | struct ite_dev *dev = pnp_get_drvdata(pdev); | |
1627 | unsigned long flags; | |
1628 | ||
1629 | ite_dbg("%s called", __func__); | |
1630 | ||
1631 | spin_lock_irqsave(&dev->lock, flags); | |
1632 | ||
1633 | /* disable hardware */ | |
1634 | dev->params.disable(dev); | |
1635 | ||
1636 | spin_unlock_irqrestore(&dev->lock, flags); | |
1637 | ||
1638 | /* free resources */ | |
1639 | free_irq(dev->cir_irq, dev); | |
1640 | release_region(dev->cir_addr, dev->params.io_region_size); | |
1641 | ||
1642 | rc_unregister_device(dev->rdev); | |
1643 | ||
1644 | kfree(dev); | |
1645 | } | |
1646 | ||
1647 | static int ite_suspend(struct pnp_dev *pdev, pm_message_t state) | |
1648 | { | |
1649 | struct ite_dev *dev = pnp_get_drvdata(pdev); | |
1650 | unsigned long flags; | |
1651 | ||
1652 | ite_dbg("%s called", __func__); | |
1653 | ||
c8120454 JW |
1654 | /* wait for any transmission to end */ |
1655 | wait_event_interruptible(dev->tx_ended, !dev->transmitting); | |
1656 | ||
620a32bb JGS |
1657 | spin_lock_irqsave(&dev->lock, flags); |
1658 | ||
1659 | /* disable all interrupts */ | |
1660 | dev->params.disable(dev); | |
1661 | ||
1662 | spin_unlock_irqrestore(&dev->lock, flags); | |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | static int ite_resume(struct pnp_dev *pdev) | |
1668 | { | |
620a32bb JGS |
1669 | struct ite_dev *dev = pnp_get_drvdata(pdev); |
1670 | unsigned long flags; | |
1671 | ||
1672 | ite_dbg("%s called", __func__); | |
1673 | ||
1674 | spin_lock_irqsave(&dev->lock, flags); | |
1675 | ||
c8120454 JW |
1676 | /* reinitialize hardware config registers */ |
1677 | dev->params.init_hardware(dev); | |
1678 | /* enable the receiver */ | |
1679 | dev->params.enable_rx(dev); | |
620a32bb JGS |
1680 | |
1681 | spin_unlock_irqrestore(&dev->lock, flags); | |
1682 | ||
fc823729 | 1683 | return 0; |
620a32bb JGS |
1684 | } |
1685 | ||
1686 | static void ite_shutdown(struct pnp_dev *pdev) | |
1687 | { | |
1688 | struct ite_dev *dev = pnp_get_drvdata(pdev); | |
1689 | unsigned long flags; | |
1690 | ||
1691 | ite_dbg("%s called", __func__); | |
1692 | ||
1693 | spin_lock_irqsave(&dev->lock, flags); | |
1694 | ||
1695 | /* disable all interrupts */ | |
1696 | dev->params.disable(dev); | |
1697 | ||
1698 | spin_unlock_irqrestore(&dev->lock, flags); | |
1699 | } | |
1700 | ||
1701 | static struct pnp_driver ite_driver = { | |
1702 | .name = ITE_DRIVER_NAME, | |
1703 | .id_table = ite_ids, | |
1704 | .probe = ite_probe, | |
4c62e976 | 1705 | .remove = ite_remove, |
620a32bb JGS |
1706 | .suspend = ite_suspend, |
1707 | .resume = ite_resume, | |
1708 | .shutdown = ite_shutdown, | |
1709 | }; | |
1710 | ||
620a32bb JGS |
1711 | MODULE_DEVICE_TABLE(pnp, ite_ids); |
1712 | MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver"); | |
1713 | ||
1714 | MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>"); | |
1715 | MODULE_LICENSE("GPL"); | |
1716 | ||
af638a04 | 1717 | module_pnp_driver(ite_driver); |