Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 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> |
Jarod Wilson | d7516c7 | 2011-04-25 14:50:50 -0300 | [diff] [blame] | 39 | #include <linux/delay.h> |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 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> |
Jean Delvare | ca444564 | 2011-03-25 15:20:14 +0100 | [diff] [blame] | 45 | #include <linux/delay.h> |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 46 | |
| 47 | #include "ite-cir.h" |
| 48 | |
| 49 | /* module parameters */ |
| 50 | |
| 51 | /* debug level */ |
| 52 | static int debug; |
| 53 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 54 | MODULE_PARM_DESC(debug, "Enable debugging output"); |
| 55 | |
| 56 | /* low limit for RX carrier freq, Hz, 0 for no RX demodulation */ |
| 57 | static int rx_low_carrier_freq; |
| 58 | module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR); |
| 59 | MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, " |
| 60 | "0 for no RX demodulation"); |
| 61 | |
| 62 | /* high limit for RX carrier freq, Hz, 0 for no RX demodulation */ |
| 63 | static int rx_high_carrier_freq; |
| 64 | module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR); |
| 65 | MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, " |
| 66 | "Hz, 0 for no RX demodulation"); |
| 67 | |
| 68 | /* override tx carrier frequency */ |
| 69 | static int tx_carrier_freq; |
| 70 | module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR); |
| 71 | MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz"); |
| 72 | |
| 73 | /* override tx duty cycle */ |
| 74 | static int tx_duty_cycle; |
| 75 | module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR); |
| 76 | MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100"); |
| 77 | |
| 78 | /* override default sample period */ |
| 79 | static long sample_period; |
| 80 | module_param(sample_period, long, S_IRUGO | S_IWUSR); |
| 81 | MODULE_PARM_DESC(sample_period, "Override carrier sample period, us"); |
| 82 | |
| 83 | /* override detected model id */ |
| 84 | static int model_number = -1; |
| 85 | module_param(model_number, int, S_IRUGO | S_IWUSR); |
| 86 | MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect"); |
| 87 | |
| 88 | |
| 89 | /* HW-independent code functions */ |
| 90 | |
| 91 | /* check whether carrier frequency is high frequency */ |
| 92 | static inline bool ite_is_high_carrier_freq(unsigned int freq) |
| 93 | { |
| 94 | return freq >= ITE_HCF_MIN_CARRIER_FREQ; |
| 95 | } |
| 96 | |
| 97 | /* get the bits required to program the carrier frequency in CFQ bits, |
| 98 | * unshifted */ |
| 99 | static u8 ite_get_carrier_freq_bits(unsigned int freq) |
| 100 | { |
| 101 | if (ite_is_high_carrier_freq(freq)) { |
| 102 | if (freq < 425000) |
| 103 | return ITE_CFQ_400; |
| 104 | |
| 105 | else if (freq < 465000) |
| 106 | return ITE_CFQ_450; |
| 107 | |
| 108 | else if (freq < 490000) |
| 109 | return ITE_CFQ_480; |
| 110 | |
| 111 | else |
| 112 | return ITE_CFQ_500; |
| 113 | } else { |
| 114 | /* trim to limits */ |
| 115 | if (freq < ITE_LCF_MIN_CARRIER_FREQ) |
| 116 | freq = ITE_LCF_MIN_CARRIER_FREQ; |
| 117 | if (freq > ITE_LCF_MAX_CARRIER_FREQ) |
| 118 | freq = ITE_LCF_MAX_CARRIER_FREQ; |
| 119 | |
| 120 | /* convert to kHz and subtract the base freq */ |
| 121 | freq = |
| 122 | DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ, |
| 123 | 1000); |
| 124 | |
| 125 | return (u8) freq; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* get the bits required to program the pulse with in TXMPW */ |
| 130 | static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle) |
| 131 | { |
| 132 | unsigned long period_ns, on_ns; |
| 133 | |
| 134 | /* sanitize freq into range */ |
| 135 | if (freq < ITE_LCF_MIN_CARRIER_FREQ) |
| 136 | freq = ITE_LCF_MIN_CARRIER_FREQ; |
| 137 | if (freq > ITE_HCF_MAX_CARRIER_FREQ) |
| 138 | freq = ITE_HCF_MAX_CARRIER_FREQ; |
| 139 | |
| 140 | period_ns = 1000000000UL / freq; |
| 141 | on_ns = period_ns * duty_cycle / 100; |
| 142 | |
| 143 | if (ite_is_high_carrier_freq(freq)) { |
| 144 | if (on_ns < 750) |
| 145 | return ITE_TXMPW_A; |
| 146 | |
| 147 | else if (on_ns < 850) |
| 148 | return ITE_TXMPW_B; |
| 149 | |
| 150 | else if (on_ns < 950) |
| 151 | return ITE_TXMPW_C; |
| 152 | |
| 153 | else if (on_ns < 1080) |
| 154 | return ITE_TXMPW_D; |
| 155 | |
| 156 | else |
| 157 | return ITE_TXMPW_E; |
| 158 | } else { |
| 159 | if (on_ns < 6500) |
| 160 | return ITE_TXMPW_A; |
| 161 | |
| 162 | else if (on_ns < 7850) |
| 163 | return ITE_TXMPW_B; |
| 164 | |
| 165 | else if (on_ns < 9650) |
| 166 | return ITE_TXMPW_C; |
| 167 | |
| 168 | else if (on_ns < 11950) |
| 169 | return ITE_TXMPW_D; |
| 170 | |
| 171 | else |
| 172 | return ITE_TXMPW_E; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | /* decode raw bytes as received by the hardware, and push them to the ir-core |
| 177 | * layer */ |
| 178 | static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int |
| 179 | length) |
| 180 | { |
| 181 | u32 sample_period; |
| 182 | unsigned long *ldata; |
| 183 | unsigned int next_one, next_zero, size; |
| 184 | DEFINE_IR_RAW_EVENT(ev); |
| 185 | |
| 186 | if (length == 0) |
| 187 | return; |
| 188 | |
| 189 | sample_period = dev->params.sample_period; |
| 190 | ldata = (unsigned long *)data; |
| 191 | size = length << 3; |
Stephen Rothwell | 30f5b28 | 2011-03-25 12:30:05 +1100 | [diff] [blame] | 192 | next_one = find_next_bit_le(ldata, size, 0); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 193 | if (next_one > 0) { |
| 194 | ev.pulse = true; |
| 195 | ev.duration = |
| 196 | ITE_BITS_TO_NS(next_one, sample_period); |
| 197 | ir_raw_event_store_with_filter(dev->rdev, &ev); |
| 198 | } |
| 199 | |
| 200 | while (next_one < size) { |
Stephen Rothwell | 30f5b28 | 2011-03-25 12:30:05 +1100 | [diff] [blame] | 201 | next_zero = find_next_zero_bit_le(ldata, size, next_one + 1); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 202 | ev.pulse = false; |
| 203 | ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period); |
| 204 | ir_raw_event_store_with_filter(dev->rdev, &ev); |
| 205 | |
| 206 | if (next_zero < size) { |
| 207 | next_one = |
Stephen Rothwell | 30f5b28 | 2011-03-25 12:30:05 +1100 | [diff] [blame] | 208 | find_next_bit_le(ldata, |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 209 | size, |
| 210 | next_zero + 1); |
| 211 | ev.pulse = true; |
| 212 | ev.duration = |
| 213 | ITE_BITS_TO_NS(next_one - next_zero, |
| 214 | sample_period); |
| 215 | ir_raw_event_store_with_filter |
| 216 | (dev->rdev, &ev); |
| 217 | } else |
| 218 | next_one = size; |
| 219 | } |
| 220 | |
| 221 | ir_raw_event_handle(dev->rdev); |
| 222 | |
| 223 | ite_dbg_verbose("decoded %d bytes.", length); |
| 224 | } |
| 225 | |
| 226 | /* set all the rx/tx carrier parameters; this must be called with the device |
| 227 | * spinlock held */ |
| 228 | static void ite_set_carrier_params(struct ite_dev *dev) |
| 229 | { |
| 230 | unsigned int freq, low_freq, high_freq; |
| 231 | int allowance; |
| 232 | bool use_demodulator; |
| 233 | bool for_tx = dev->transmitting; |
| 234 | |
| 235 | ite_dbg("%s called", __func__); |
| 236 | |
| 237 | if (for_tx) { |
| 238 | /* we don't need no stinking calculations */ |
| 239 | freq = dev->params.tx_carrier_freq; |
| 240 | allowance = ITE_RXDCR_DEFAULT; |
| 241 | use_demodulator = false; |
| 242 | } else { |
| 243 | low_freq = dev->params.rx_low_carrier_freq; |
| 244 | high_freq = dev->params.rx_high_carrier_freq; |
| 245 | |
| 246 | if (low_freq == 0) { |
| 247 | /* don't demodulate */ |
| 248 | freq = |
| 249 | ITE_DEFAULT_CARRIER_FREQ; |
| 250 | allowance = ITE_RXDCR_DEFAULT; |
| 251 | use_demodulator = false; |
| 252 | } else { |
| 253 | /* calculate the middle freq */ |
| 254 | freq = (low_freq + high_freq) / 2; |
| 255 | |
| 256 | /* calculate the allowance */ |
| 257 | allowance = |
| 258 | DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq), |
| 259 | ITE_RXDCR_PER_10000_STEP |
| 260 | * (high_freq + low_freq)); |
| 261 | |
| 262 | if (allowance < 1) |
| 263 | allowance = 1; |
| 264 | |
| 265 | if (allowance > ITE_RXDCR_MAX) |
| 266 | allowance = ITE_RXDCR_MAX; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /* set the carrier parameters in a device-dependent way */ |
| 271 | dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq), |
| 272 | use_demodulator, ite_get_carrier_freq_bits(freq), allowance, |
| 273 | ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle)); |
| 274 | } |
| 275 | |
| 276 | /* interrupt service routine for incoming and outgoing CIR data */ |
| 277 | static irqreturn_t ite_cir_isr(int irq, void *data) |
| 278 | { |
| 279 | struct ite_dev *dev = data; |
| 280 | unsigned long flags; |
| 281 | irqreturn_t ret = IRQ_RETVAL(IRQ_NONE); |
| 282 | u8 rx_buf[ITE_RX_FIFO_LEN]; |
| 283 | int rx_bytes; |
| 284 | int iflags; |
| 285 | |
| 286 | ite_dbg_verbose("%s firing", __func__); |
| 287 | |
| 288 | /* grab the spinlock */ |
| 289 | spin_lock_irqsave(&dev->lock, flags); |
| 290 | |
| 291 | /* read the interrupt flags */ |
| 292 | iflags = dev->params.get_irq_causes(dev); |
| 293 | |
| 294 | /* check for the receive interrupt */ |
| 295 | if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) { |
| 296 | /* read the FIFO bytes */ |
| 297 | rx_bytes = |
| 298 | dev->params.get_rx_bytes(dev, rx_buf, |
| 299 | ITE_RX_FIFO_LEN); |
| 300 | |
| 301 | if (rx_bytes > 0) { |
| 302 | /* drop the spinlock, since the ir-core layer |
| 303 | * may call us back again through |
| 304 | * ite_s_idle() */ |
| 305 | spin_unlock_irqrestore(&dev-> |
| 306 | lock, |
| 307 | flags); |
| 308 | |
| 309 | /* decode the data we've just received */ |
| 310 | ite_decode_bytes(dev, rx_buf, |
| 311 | rx_bytes); |
| 312 | |
| 313 | /* reacquire the spinlock */ |
| 314 | spin_lock_irqsave(&dev->lock, |
| 315 | flags); |
| 316 | |
| 317 | /* mark the interrupt as serviced */ |
| 318 | ret = IRQ_RETVAL(IRQ_HANDLED); |
| 319 | } |
| 320 | } else if (iflags & ITE_IRQ_TX_FIFO) { |
| 321 | /* FIFO space available interrupt */ |
| 322 | ite_dbg_verbose("got interrupt for TX FIFO"); |
| 323 | |
| 324 | /* wake any sleeping transmitter */ |
| 325 | wake_up_interruptible(&dev->tx_queue); |
| 326 | |
| 327 | /* mark the interrupt as serviced */ |
| 328 | ret = IRQ_RETVAL(IRQ_HANDLED); |
| 329 | } |
| 330 | |
| 331 | /* drop the spinlock */ |
| 332 | spin_unlock_irqrestore(&dev->lock, flags); |
| 333 | |
| 334 | ite_dbg_verbose("%s done returning %d", __func__, (int)ret); |
| 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | /* set the rx carrier freq range, guess it's in Hz... */ |
| 340 | static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32 |
| 341 | carrier_high) |
| 342 | { |
| 343 | unsigned long flags; |
| 344 | struct ite_dev *dev = rcdev->priv; |
| 345 | |
| 346 | spin_lock_irqsave(&dev->lock, flags); |
| 347 | dev->params.rx_low_carrier_freq = carrier_low; |
| 348 | dev->params.rx_high_carrier_freq = carrier_high; |
| 349 | ite_set_carrier_params(dev); |
| 350 | spin_unlock_irqrestore(&dev->lock, flags); |
| 351 | |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | /* set the tx carrier freq, guess it's in Hz... */ |
| 356 | static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier) |
| 357 | { |
| 358 | unsigned long flags; |
| 359 | struct ite_dev *dev = rcdev->priv; |
| 360 | |
| 361 | spin_lock_irqsave(&dev->lock, flags); |
| 362 | dev->params.tx_carrier_freq = carrier; |
| 363 | ite_set_carrier_params(dev); |
| 364 | spin_unlock_irqrestore(&dev->lock, flags); |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | /* set the tx duty cycle by controlling the pulse width */ |
| 370 | static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle) |
| 371 | { |
| 372 | unsigned long flags; |
| 373 | struct ite_dev *dev = rcdev->priv; |
| 374 | |
| 375 | spin_lock_irqsave(&dev->lock, flags); |
| 376 | dev->params.tx_duty_cycle = duty_cycle; |
| 377 | ite_set_carrier_params(dev); |
| 378 | spin_unlock_irqrestore(&dev->lock, flags); |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | /* transmit out IR pulses; what you get here is a batch of alternating |
| 384 | * pulse/space/pulse/space lengths that we should write out completely through |
| 385 | * the FIFO, blocking on a full FIFO */ |
| 386 | static int ite_tx_ir(struct rc_dev *rcdev, int *txbuf, u32 n) |
| 387 | { |
| 388 | unsigned long flags; |
| 389 | struct ite_dev *dev = rcdev->priv; |
| 390 | bool is_pulse = false; |
| 391 | int remaining_us, fifo_avail, fifo_remaining, last_idx = 0; |
| 392 | int max_rle_us, next_rle_us; |
| 393 | int ret = n; |
| 394 | u8 last_sent[ITE_TX_FIFO_LEN]; |
| 395 | u8 val; |
| 396 | |
| 397 | ite_dbg("%s called", __func__); |
| 398 | |
| 399 | /* clear the array just in case */ |
| 400 | memset(last_sent, 0, ARRAY_SIZE(last_sent)); |
| 401 | |
| 402 | /* n comes in bytes; convert to ints */ |
| 403 | n /= sizeof(int); |
| 404 | |
| 405 | spin_lock_irqsave(&dev->lock, flags); |
| 406 | |
| 407 | /* let everybody know we're now transmitting */ |
| 408 | dev->transmitting = true; |
| 409 | |
| 410 | /* and set the carrier values for transmission */ |
| 411 | ite_set_carrier_params(dev); |
| 412 | |
| 413 | /* calculate how much time we can send in one byte */ |
| 414 | max_rle_us = |
| 415 | (ITE_BAUDRATE_DIVISOR * dev->params.sample_period * |
| 416 | ITE_TX_MAX_RLE) / 1000; |
| 417 | |
| 418 | /* disable the receiver */ |
| 419 | dev->params.disable_rx(dev); |
| 420 | |
| 421 | /* this is where we'll begin filling in the FIFO, until it's full. |
| 422 | * then we'll just activate the interrupt, wait for it to wake us up |
| 423 | * again, disable it, continue filling the FIFO... until everything |
| 424 | * has been pushed out */ |
| 425 | fifo_avail = |
| 426 | ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev); |
| 427 | |
| 428 | while (n > 0 && dev->in_use) { |
| 429 | /* transmit the next sample */ |
| 430 | is_pulse = !is_pulse; |
| 431 | remaining_us = *(txbuf++); |
| 432 | n--; |
| 433 | |
| 434 | ite_dbg("%s: %ld", |
| 435 | ((is_pulse) ? "pulse" : "space"), |
| 436 | (long int) |
| 437 | remaining_us); |
| 438 | |
| 439 | /* repeat while the pulse is non-zero length */ |
| 440 | while (remaining_us > 0 && dev->in_use) { |
| 441 | if (remaining_us > max_rle_us) |
| 442 | next_rle_us = max_rle_us; |
| 443 | |
| 444 | else |
| 445 | next_rle_us = remaining_us; |
| 446 | |
| 447 | remaining_us -= next_rle_us; |
| 448 | |
| 449 | /* check what's the length we have to pump out */ |
| 450 | val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us; |
| 451 | |
| 452 | /* put it into the sent buffer */ |
| 453 | last_sent[last_idx++] = val; |
| 454 | last_idx &= (ITE_TX_FIFO_LEN); |
| 455 | |
| 456 | /* encode it for 7 bits */ |
| 457 | val = (val - 1) & ITE_TX_RLE_MASK; |
| 458 | |
| 459 | /* take into account pulse/space prefix */ |
| 460 | if (is_pulse) |
| 461 | val |= ITE_TX_PULSE; |
| 462 | |
| 463 | else |
| 464 | val |= ITE_TX_SPACE; |
| 465 | |
Mauro Carvalho Chehab | 2ccb24ff | 2011-03-22 15:12:40 -0300 | [diff] [blame] | 466 | /* |
| 467 | * if we get to 0 available, read again, just in case |
| 468 | * some other slot got freed |
| 469 | */ |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 470 | if (fifo_avail <= 0) |
| 471 | fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev); |
| 472 | |
| 473 | /* if it's still full */ |
| 474 | if (fifo_avail <= 0) { |
| 475 | /* enable the tx interrupt */ |
| 476 | dev->params. |
| 477 | enable_tx_interrupt(dev); |
| 478 | |
| 479 | /* drop the spinlock */ |
| 480 | spin_unlock_irqrestore(&dev->lock, flags); |
| 481 | |
| 482 | /* wait for the FIFO to empty enough */ |
| 483 | wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8); |
| 484 | |
| 485 | /* get the spinlock again */ |
| 486 | spin_lock_irqsave(&dev->lock, flags); |
| 487 | |
| 488 | /* disable the tx interrupt again. */ |
| 489 | dev->params. |
| 490 | disable_tx_interrupt(dev); |
| 491 | } |
| 492 | |
| 493 | /* now send the byte through the FIFO */ |
| 494 | dev->params.put_tx_byte(dev, val); |
| 495 | fifo_avail--; |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | /* wait and don't return until the whole FIFO has been sent out; |
| 500 | * otherwise we could configure the RX carrier params instead of the |
| 501 | * TX ones while the transmission is still being performed! */ |
| 502 | fifo_remaining = dev->params.get_tx_used_slots(dev); |
| 503 | remaining_us = 0; |
| 504 | while (fifo_remaining > 0) { |
| 505 | fifo_remaining--; |
| 506 | last_idx--; |
| 507 | last_idx &= (ITE_TX_FIFO_LEN - 1); |
| 508 | remaining_us += last_sent[last_idx]; |
| 509 | } |
| 510 | remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE); |
| 511 | |
| 512 | /* drop the spinlock while we sleep */ |
| 513 | spin_unlock_irqrestore(&dev->lock, flags); |
| 514 | |
| 515 | /* sleep remaining_us microseconds */ |
| 516 | mdelay(DIV_ROUND_UP(remaining_us, 1000)); |
| 517 | |
| 518 | /* reacquire the spinlock */ |
| 519 | spin_lock_irqsave(&dev->lock, flags); |
| 520 | |
| 521 | /* now we're not transmitting anymore */ |
| 522 | dev->transmitting = false; |
| 523 | |
| 524 | /* and set the carrier values for reception */ |
| 525 | ite_set_carrier_params(dev); |
| 526 | |
| 527 | /* reenable the receiver */ |
| 528 | if (dev->in_use) |
| 529 | dev->params.enable_rx(dev); |
| 530 | |
| 531 | /* notify transmission end */ |
| 532 | wake_up_interruptible(&dev->tx_ended); |
| 533 | |
| 534 | spin_unlock_irqrestore(&dev->lock, flags); |
| 535 | |
| 536 | return ret; |
| 537 | } |
| 538 | |
| 539 | /* idle the receiver if needed */ |
| 540 | static void ite_s_idle(struct rc_dev *rcdev, bool enable) |
| 541 | { |
| 542 | unsigned long flags; |
| 543 | struct ite_dev *dev = rcdev->priv; |
| 544 | |
| 545 | ite_dbg("%s called", __func__); |
| 546 | |
| 547 | if (enable) { |
| 548 | spin_lock_irqsave(&dev->lock, flags); |
| 549 | dev->params.idle_rx(dev); |
| 550 | spin_unlock_irqrestore(&dev->lock, flags); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | |
| 555 | /* IT8712F HW-specific functions */ |
| 556 | |
| 557 | /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| 558 | * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| 559 | * */ |
| 560 | static int it87_get_irq_causes(struct ite_dev *dev) |
| 561 | { |
| 562 | u8 iflags; |
| 563 | int ret = 0; |
| 564 | |
| 565 | ite_dbg("%s called", __func__); |
| 566 | |
| 567 | /* read the interrupt flags */ |
| 568 | iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II; |
| 569 | |
| 570 | switch (iflags) { |
| 571 | case IT87_II_RXDS: |
| 572 | ret = ITE_IRQ_RX_FIFO; |
| 573 | break; |
| 574 | case IT87_II_RXFO: |
| 575 | ret = ITE_IRQ_RX_FIFO_OVERRUN; |
| 576 | break; |
| 577 | case IT87_II_TXLDL: |
| 578 | ret = ITE_IRQ_TX_FIFO; |
| 579 | break; |
| 580 | } |
| 581 | |
| 582 | return ret; |
| 583 | } |
| 584 | |
| 585 | /* set the carrier parameters; to be called with the spinlock held */ |
| 586 | static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| 587 | bool use_demodulator, |
| 588 | u8 carrier_freq_bits, u8 allowance_bits, |
| 589 | u8 pulse_width_bits) |
| 590 | { |
| 591 | u8 val; |
| 592 | |
| 593 | ite_dbg("%s called", __func__); |
| 594 | |
| 595 | /* program the RCR register */ |
| 596 | val = inb(dev->cir_addr + IT87_RCR) |
| 597 | & ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR); |
| 598 | |
| 599 | if (high_freq) |
| 600 | val |= IT87_HCFS; |
| 601 | |
| 602 | if (use_demodulator) |
| 603 | val |= IT87_RXEND; |
| 604 | |
| 605 | val |= allowance_bits; |
| 606 | |
| 607 | outb(val, dev->cir_addr + IT87_RCR); |
| 608 | |
| 609 | /* program the TCR2 register */ |
| 610 | outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits, |
| 611 | dev->cir_addr + IT87_TCR2); |
| 612 | } |
| 613 | |
| 614 | /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| 615 | * held */ |
| 616 | static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| 617 | { |
| 618 | int fifo, read = 0; |
| 619 | |
| 620 | ite_dbg("%s called", __func__); |
| 621 | |
| 622 | /* read how many bytes are still in the FIFO */ |
| 623 | fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC; |
| 624 | |
| 625 | while (fifo > 0 && buf_size > 0) { |
| 626 | *(buf++) = inb(dev->cir_addr + IT87_DR); |
| 627 | fifo--; |
| 628 | read++; |
| 629 | buf_size--; |
| 630 | } |
| 631 | |
| 632 | return read; |
| 633 | } |
| 634 | |
| 635 | /* return how many bytes are still in the FIFO; this will be called |
| 636 | * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| 637 | * empty; let's expect this won't be a problem */ |
| 638 | static int it87_get_tx_used_slots(struct ite_dev *dev) |
| 639 | { |
| 640 | ite_dbg("%s called", __func__); |
| 641 | |
| 642 | return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC; |
| 643 | } |
| 644 | |
| 645 | /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| 646 | static void it87_put_tx_byte(struct ite_dev *dev, u8 value) |
| 647 | { |
| 648 | outb(value, dev->cir_addr + IT87_DR); |
| 649 | } |
| 650 | |
| 651 | /* idle the receiver so that we won't receive samples until another |
| 652 | pulse is detected; this must be called with the device spinlock held */ |
| 653 | static void it87_idle_rx(struct ite_dev *dev) |
| 654 | { |
| 655 | ite_dbg("%s called", __func__); |
| 656 | |
| 657 | /* disable streaming by clearing RXACT writing it as 1 */ |
| 658 | outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT, |
| 659 | dev->cir_addr + IT87_RCR); |
| 660 | |
| 661 | /* clear the FIFO */ |
| 662 | outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR, |
| 663 | dev->cir_addr + IT87_TCR1); |
| 664 | } |
| 665 | |
| 666 | /* disable the receiver; this must be called with the device spinlock held */ |
| 667 | static void it87_disable_rx(struct ite_dev *dev) |
| 668 | { |
| 669 | ite_dbg("%s called", __func__); |
| 670 | |
| 671 | /* disable the receiver interrupts */ |
| 672 | outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE), |
| 673 | dev->cir_addr + IT87_IER); |
| 674 | |
| 675 | /* disable the receiver */ |
| 676 | outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN, |
| 677 | dev->cir_addr + IT87_RCR); |
| 678 | |
| 679 | /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| 680 | * in the previous outb() call) */ |
| 681 | it87_idle_rx(dev); |
| 682 | } |
| 683 | |
| 684 | /* enable the receiver; this must be called with the device spinlock held */ |
| 685 | static void it87_enable_rx(struct ite_dev *dev) |
| 686 | { |
| 687 | ite_dbg("%s called", __func__); |
| 688 | |
| 689 | /* enable the receiver by setting RXEN */ |
| 690 | outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN, |
| 691 | dev->cir_addr + IT87_RCR); |
| 692 | |
| 693 | /* just prepare it to idle for the next reception */ |
| 694 | it87_idle_rx(dev); |
| 695 | |
| 696 | /* enable the receiver interrupts and master enable flag */ |
| 697 | outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC, |
| 698 | dev->cir_addr + IT87_IER); |
| 699 | } |
| 700 | |
| 701 | /* disable the transmitter interrupt; this must be called with the device |
| 702 | * spinlock held */ |
| 703 | static void it87_disable_tx_interrupt(struct ite_dev *dev) |
| 704 | { |
| 705 | ite_dbg("%s called", __func__); |
| 706 | |
| 707 | /* disable the transmitter interrupts */ |
| 708 | outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE, |
| 709 | dev->cir_addr + IT87_IER); |
| 710 | } |
| 711 | |
| 712 | /* enable the transmitter interrupt; this must be called with the device |
| 713 | * spinlock held */ |
| 714 | static void it87_enable_tx_interrupt(struct ite_dev *dev) |
| 715 | { |
| 716 | ite_dbg("%s called", __func__); |
| 717 | |
| 718 | /* enable the transmitter interrupts and master enable flag */ |
| 719 | outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC, |
| 720 | dev->cir_addr + IT87_IER); |
| 721 | } |
| 722 | |
| 723 | /* disable the device; this must be called with the device spinlock held */ |
| 724 | static void it87_disable(struct ite_dev *dev) |
| 725 | { |
| 726 | ite_dbg("%s called", __func__); |
| 727 | |
| 728 | /* clear out all interrupt enable flags */ |
| 729 | outb(inb(dev->cir_addr + IT87_IER) & |
| 730 | ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE), |
| 731 | dev->cir_addr + IT87_IER); |
| 732 | |
| 733 | /* disable the receiver */ |
| 734 | it87_disable_rx(dev); |
| 735 | |
| 736 | /* erase the FIFO */ |
| 737 | outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1), |
| 738 | dev->cir_addr + IT87_TCR1); |
| 739 | } |
| 740 | |
| 741 | /* initialize the hardware */ |
| 742 | static void it87_init_hardware(struct ite_dev *dev) |
| 743 | { |
| 744 | ite_dbg("%s called", __func__); |
| 745 | |
| 746 | /* enable just the baud rate divisor register, |
| 747 | disabling all the interrupts at the same time */ |
| 748 | outb((inb(dev->cir_addr + IT87_IER) & |
| 749 | ~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR, |
| 750 | dev->cir_addr + IT87_IER); |
| 751 | |
| 752 | /* write out the baud rate divisor */ |
| 753 | outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR); |
| 754 | outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR); |
| 755 | |
| 756 | /* disable the baud rate divisor register again */ |
| 757 | outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR, |
| 758 | dev->cir_addr + IT87_IER); |
| 759 | |
| 760 | /* program the RCR register defaults */ |
| 761 | outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR); |
| 762 | |
| 763 | /* program the TCR1 register */ |
| 764 | outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE |
| 765 | | IT87_FIFOTL_DEFAULT | IT87_FIFOCLR, |
| 766 | dev->cir_addr + IT87_TCR1); |
| 767 | |
| 768 | /* program the carrier parameters */ |
| 769 | ite_set_carrier_params(dev); |
| 770 | } |
| 771 | |
| 772 | /* IT8512F on ITE8708 HW-specific functions */ |
| 773 | |
| 774 | /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| 775 | * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| 776 | * */ |
| 777 | static int it8708_get_irq_causes(struct ite_dev *dev) |
| 778 | { |
| 779 | u8 iflags; |
| 780 | int ret = 0; |
| 781 | |
| 782 | ite_dbg("%s called", __func__); |
| 783 | |
| 784 | /* read the interrupt flags */ |
| 785 | iflags = inb(dev->cir_addr + IT8708_C0IIR); |
| 786 | |
| 787 | if (iflags & IT85_TLDLI) |
| 788 | ret |= ITE_IRQ_TX_FIFO; |
| 789 | if (iflags & IT85_RDAI) |
| 790 | ret |= ITE_IRQ_RX_FIFO; |
| 791 | if (iflags & IT85_RFOI) |
| 792 | ret |= ITE_IRQ_RX_FIFO_OVERRUN; |
| 793 | |
| 794 | return ret; |
| 795 | } |
| 796 | |
| 797 | /* set the carrier parameters; to be called with the spinlock held */ |
| 798 | static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| 799 | bool use_demodulator, |
| 800 | u8 carrier_freq_bits, u8 allowance_bits, |
| 801 | u8 pulse_width_bits) |
| 802 | { |
| 803 | u8 val; |
| 804 | |
| 805 | ite_dbg("%s called", __func__); |
| 806 | |
| 807 | /* program the C0CFR register, with HRAE=1 */ |
| 808 | outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE, |
| 809 | dev->cir_addr + IT8708_BANKSEL); |
| 810 | |
| 811 | val = (inb(dev->cir_addr + IT8708_C0CFR) |
| 812 | & ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits; |
| 813 | |
| 814 | if (high_freq) |
| 815 | val |= IT85_HCFS; |
| 816 | |
| 817 | outb(val, dev->cir_addr + IT8708_C0CFR); |
| 818 | |
| 819 | outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE, |
| 820 | dev->cir_addr + IT8708_BANKSEL); |
| 821 | |
| 822 | /* program the C0RCR register */ |
| 823 | val = inb(dev->cir_addr + IT8708_C0RCR) |
| 824 | & ~(IT85_RXEND | IT85_RXDCR); |
| 825 | |
| 826 | if (use_demodulator) |
| 827 | val |= IT85_RXEND; |
| 828 | |
| 829 | val |= allowance_bits; |
| 830 | |
| 831 | outb(val, dev->cir_addr + IT8708_C0RCR); |
| 832 | |
| 833 | /* program the C0TCR register */ |
| 834 | val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW; |
| 835 | val |= pulse_width_bits; |
| 836 | outb(val, dev->cir_addr + IT8708_C0TCR); |
| 837 | } |
| 838 | |
| 839 | /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| 840 | * held */ |
| 841 | static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| 842 | { |
| 843 | int fifo, read = 0; |
| 844 | |
| 845 | ite_dbg("%s called", __func__); |
| 846 | |
| 847 | /* read how many bytes are still in the FIFO */ |
| 848 | fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC; |
| 849 | |
| 850 | while (fifo > 0 && buf_size > 0) { |
| 851 | *(buf++) = inb(dev->cir_addr + IT8708_C0DR); |
| 852 | fifo--; |
| 853 | read++; |
| 854 | buf_size--; |
| 855 | } |
| 856 | |
| 857 | return read; |
| 858 | } |
| 859 | |
| 860 | /* return how many bytes are still in the FIFO; this will be called |
| 861 | * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| 862 | * empty; let's expect this won't be a problem */ |
| 863 | static int it8708_get_tx_used_slots(struct ite_dev *dev) |
| 864 | { |
| 865 | ite_dbg("%s called", __func__); |
| 866 | |
| 867 | return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC; |
| 868 | } |
| 869 | |
| 870 | /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| 871 | static void it8708_put_tx_byte(struct ite_dev *dev, u8 value) |
| 872 | { |
| 873 | outb(value, dev->cir_addr + IT8708_C0DR); |
| 874 | } |
| 875 | |
| 876 | /* idle the receiver so that we won't receive samples until another |
| 877 | pulse is detected; this must be called with the device spinlock held */ |
| 878 | static void it8708_idle_rx(struct ite_dev *dev) |
| 879 | { |
| 880 | ite_dbg("%s called", __func__); |
| 881 | |
| 882 | /* disable streaming by clearing RXACT writing it as 1 */ |
| 883 | outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT, |
| 884 | dev->cir_addr + IT8708_C0RCR); |
| 885 | |
| 886 | /* clear the FIFO */ |
| 887 | outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR, |
| 888 | dev->cir_addr + IT8708_C0MSTCR); |
| 889 | } |
| 890 | |
| 891 | /* disable the receiver; this must be called with the device spinlock held */ |
| 892 | static void it8708_disable_rx(struct ite_dev *dev) |
| 893 | { |
| 894 | ite_dbg("%s called", __func__); |
| 895 | |
| 896 | /* disable the receiver interrupts */ |
| 897 | outb(inb(dev->cir_addr + IT8708_C0IER) & |
| 898 | ~(IT85_RDAIE | IT85_RFOIE), |
| 899 | dev->cir_addr + IT8708_C0IER); |
| 900 | |
| 901 | /* disable the receiver */ |
| 902 | outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN, |
| 903 | dev->cir_addr + IT8708_C0RCR); |
| 904 | |
| 905 | /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| 906 | * in the previous outb() call) */ |
| 907 | it8708_idle_rx(dev); |
| 908 | } |
| 909 | |
| 910 | /* enable the receiver; this must be called with the device spinlock held */ |
| 911 | static void it8708_enable_rx(struct ite_dev *dev) |
| 912 | { |
| 913 | ite_dbg("%s called", __func__); |
| 914 | |
| 915 | /* enable the receiver by setting RXEN */ |
| 916 | outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN, |
| 917 | dev->cir_addr + IT8708_C0RCR); |
| 918 | |
| 919 | /* just prepare it to idle for the next reception */ |
| 920 | it8708_idle_rx(dev); |
| 921 | |
| 922 | /* enable the receiver interrupts and master enable flag */ |
| 923 | outb(inb(dev->cir_addr + IT8708_C0IER) |
| 924 | |IT85_RDAIE | IT85_RFOIE | IT85_IEC, |
| 925 | dev->cir_addr + IT8708_C0IER); |
| 926 | } |
| 927 | |
| 928 | /* disable the transmitter interrupt; this must be called with the device |
| 929 | * spinlock held */ |
| 930 | static void it8708_disable_tx_interrupt(struct ite_dev *dev) |
| 931 | { |
| 932 | ite_dbg("%s called", __func__); |
| 933 | |
| 934 | /* disable the transmitter interrupts */ |
| 935 | outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE, |
| 936 | dev->cir_addr + IT8708_C0IER); |
| 937 | } |
| 938 | |
| 939 | /* enable the transmitter interrupt; this must be called with the device |
| 940 | * spinlock held */ |
| 941 | static void it8708_enable_tx_interrupt(struct ite_dev *dev) |
| 942 | { |
| 943 | ite_dbg("%s called", __func__); |
| 944 | |
| 945 | /* enable the transmitter interrupts and master enable flag */ |
| 946 | outb(inb(dev->cir_addr + IT8708_C0IER) |
| 947 | |IT85_TLDLIE | IT85_IEC, |
| 948 | dev->cir_addr + IT8708_C0IER); |
| 949 | } |
| 950 | |
| 951 | /* disable the device; this must be called with the device spinlock held */ |
| 952 | static void it8708_disable(struct ite_dev *dev) |
| 953 | { |
| 954 | ite_dbg("%s called", __func__); |
| 955 | |
| 956 | /* clear out all interrupt enable flags */ |
| 957 | outb(inb(dev->cir_addr + IT8708_C0IER) & |
| 958 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| 959 | dev->cir_addr + IT8708_C0IER); |
| 960 | |
| 961 | /* disable the receiver */ |
| 962 | it8708_disable_rx(dev); |
| 963 | |
| 964 | /* erase the FIFO */ |
| 965 | outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR), |
| 966 | dev->cir_addr + IT8708_C0MSTCR); |
| 967 | } |
| 968 | |
| 969 | /* initialize the hardware */ |
| 970 | static void it8708_init_hardware(struct ite_dev *dev) |
| 971 | { |
| 972 | ite_dbg("%s called", __func__); |
| 973 | |
| 974 | /* disable all the interrupts */ |
| 975 | outb(inb(dev->cir_addr + IT8708_C0IER) & |
| 976 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| 977 | dev->cir_addr + IT8708_C0IER); |
| 978 | |
| 979 | /* program the baud rate divisor */ |
| 980 | outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE, |
| 981 | dev->cir_addr + IT8708_BANKSEL); |
| 982 | |
| 983 | outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR); |
| 984 | outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, |
| 985 | dev->cir_addr + IT8708_C0BDHR); |
| 986 | |
| 987 | outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE, |
| 988 | dev->cir_addr + IT8708_BANKSEL); |
| 989 | |
| 990 | /* program the C0MSTCR register defaults */ |
| 991 | outb((inb(dev->cir_addr + IT8708_C0MSTCR) & |
| 992 | ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL | |
| 993 | IT85_FIFOCLR | IT85_RESET)) | |
| 994 | IT85_FIFOTL_DEFAULT, |
| 995 | dev->cir_addr + IT8708_C0MSTCR); |
| 996 | |
| 997 | /* program the C0RCR register defaults */ |
| 998 | outb((inb(dev->cir_addr + IT8708_C0RCR) & |
| 999 | ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | |
| 1000 | IT85_RXACT | IT85_RXDCR)) | |
| 1001 | ITE_RXDCR_DEFAULT, |
| 1002 | dev->cir_addr + IT8708_C0RCR); |
| 1003 | |
| 1004 | /* program the C0TCR register defaults */ |
| 1005 | outb((inb(dev->cir_addr + IT8708_C0TCR) & |
| 1006 | ~(IT85_TXMPM | IT85_TXMPW)) |
| 1007 | |IT85_TXRLE | IT85_TXENDF | |
| 1008 | IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT, |
| 1009 | dev->cir_addr + IT8708_C0TCR); |
| 1010 | |
| 1011 | /* program the carrier parameters */ |
| 1012 | ite_set_carrier_params(dev); |
| 1013 | } |
| 1014 | |
| 1015 | /* IT8512F on ITE8709 HW-specific functions */ |
| 1016 | |
| 1017 | /* read a byte from the SRAM module */ |
| 1018 | static inline u8 it8709_rm(struct ite_dev *dev, int index) |
| 1019 | { |
| 1020 | outb(index, dev->cir_addr + IT8709_RAM_IDX); |
| 1021 | return inb(dev->cir_addr + IT8709_RAM_VAL); |
| 1022 | } |
| 1023 | |
| 1024 | /* write a byte to the SRAM module */ |
| 1025 | static inline void it8709_wm(struct ite_dev *dev, u8 val, int index) |
| 1026 | { |
| 1027 | outb(index, dev->cir_addr + IT8709_RAM_IDX); |
| 1028 | outb(val, dev->cir_addr + IT8709_RAM_VAL); |
| 1029 | } |
| 1030 | |
| 1031 | static void it8709_wait(struct ite_dev *dev) |
| 1032 | { |
| 1033 | int i = 0; |
| 1034 | /* |
| 1035 | * loop until device tells it's ready to continue |
| 1036 | * iterations count is usually ~750 but can sometimes achieve 13000 |
| 1037 | */ |
| 1038 | for (i = 0; i < 15000; i++) { |
| 1039 | udelay(2); |
| 1040 | if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE) |
| 1041 | break; |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | /* read the value of a CIR register */ |
| 1046 | static u8 it8709_rr(struct ite_dev *dev, int index) |
| 1047 | { |
| 1048 | /* just wait in case the previous access was a write */ |
| 1049 | it8709_wait(dev); |
| 1050 | it8709_wm(dev, index, IT8709_REG_IDX); |
| 1051 | it8709_wm(dev, IT8709_READ, IT8709_MODE); |
| 1052 | |
| 1053 | /* wait for the read data to be available */ |
| 1054 | it8709_wait(dev); |
| 1055 | |
| 1056 | /* return the read value */ |
| 1057 | return it8709_rm(dev, IT8709_REG_VAL); |
| 1058 | } |
| 1059 | |
| 1060 | /* write the value of a CIR register */ |
| 1061 | static void it8709_wr(struct ite_dev *dev, u8 val, int index) |
| 1062 | { |
| 1063 | /* we wait before writing, and not afterwards, since this allows us to |
| 1064 | * pipeline the host CPU with the microcontroller */ |
| 1065 | it8709_wait(dev); |
| 1066 | it8709_wm(dev, val, IT8709_REG_VAL); |
| 1067 | it8709_wm(dev, index, IT8709_REG_IDX); |
| 1068 | it8709_wm(dev, IT8709_WRITE, IT8709_MODE); |
| 1069 | } |
| 1070 | |
| 1071 | /* retrieve a bitmask of the current causes for a pending interrupt; this may |
| 1072 | * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN |
| 1073 | * */ |
| 1074 | static int it8709_get_irq_causes(struct ite_dev *dev) |
| 1075 | { |
| 1076 | u8 iflags; |
| 1077 | int ret = 0; |
| 1078 | |
| 1079 | ite_dbg("%s called", __func__); |
| 1080 | |
| 1081 | /* read the interrupt flags */ |
| 1082 | iflags = it8709_rm(dev, IT8709_IIR); |
| 1083 | |
| 1084 | if (iflags & IT85_TLDLI) |
| 1085 | ret |= ITE_IRQ_TX_FIFO; |
| 1086 | if (iflags & IT85_RDAI) |
| 1087 | ret |= ITE_IRQ_RX_FIFO; |
| 1088 | if (iflags & IT85_RFOI) |
| 1089 | ret |= ITE_IRQ_RX_FIFO_OVERRUN; |
| 1090 | |
| 1091 | return ret; |
| 1092 | } |
| 1093 | |
| 1094 | /* set the carrier parameters; to be called with the spinlock held */ |
| 1095 | static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq, |
| 1096 | bool use_demodulator, |
| 1097 | u8 carrier_freq_bits, u8 allowance_bits, |
| 1098 | u8 pulse_width_bits) |
| 1099 | { |
| 1100 | u8 val; |
| 1101 | |
| 1102 | ite_dbg("%s called", __func__); |
| 1103 | |
| 1104 | val = (it8709_rr(dev, IT85_C0CFR) |
| 1105 | &~(IT85_HCFS | IT85_CFQ)) | |
| 1106 | carrier_freq_bits; |
| 1107 | |
| 1108 | if (high_freq) |
| 1109 | val |= IT85_HCFS; |
| 1110 | |
| 1111 | it8709_wr(dev, val, IT85_C0CFR); |
| 1112 | |
| 1113 | /* program the C0RCR register */ |
| 1114 | val = it8709_rr(dev, IT85_C0RCR) |
| 1115 | & ~(IT85_RXEND | IT85_RXDCR); |
| 1116 | |
| 1117 | if (use_demodulator) |
| 1118 | val |= IT85_RXEND; |
| 1119 | |
| 1120 | val |= allowance_bits; |
| 1121 | |
| 1122 | it8709_wr(dev, val, IT85_C0RCR); |
| 1123 | |
| 1124 | /* program the C0TCR register */ |
| 1125 | val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW; |
| 1126 | val |= pulse_width_bits; |
| 1127 | it8709_wr(dev, val, IT85_C0TCR); |
| 1128 | } |
| 1129 | |
| 1130 | /* read up to buf_size bytes from the RX FIFO; to be called with the spinlock |
| 1131 | * held */ |
| 1132 | static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size) |
| 1133 | { |
| 1134 | int fifo, read = 0; |
| 1135 | |
| 1136 | ite_dbg("%s called", __func__); |
| 1137 | |
| 1138 | /* read how many bytes are still in the FIFO */ |
| 1139 | fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC; |
| 1140 | |
| 1141 | while (fifo > 0 && buf_size > 0) { |
| 1142 | *(buf++) = it8709_rm(dev, IT8709_FIFO + read); |
| 1143 | fifo--; |
| 1144 | read++; |
| 1145 | buf_size--; |
| 1146 | } |
| 1147 | |
| 1148 | /* 'clear' the FIFO by setting the writing index to 0; this is |
| 1149 | * completely bound to be racy, but we can't help it, since it's a |
| 1150 | * limitation of the protocol */ |
| 1151 | it8709_wm(dev, 0, IT8709_RFSR); |
| 1152 | |
| 1153 | return read; |
| 1154 | } |
| 1155 | |
| 1156 | /* return how many bytes are still in the FIFO; this will be called |
| 1157 | * with the device spinlock NOT HELD while waiting for the TX FIFO to get |
| 1158 | * empty; let's expect this won't be a problem */ |
| 1159 | static int it8709_get_tx_used_slots(struct ite_dev *dev) |
| 1160 | { |
| 1161 | ite_dbg("%s called", __func__); |
| 1162 | |
| 1163 | return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC; |
| 1164 | } |
| 1165 | |
| 1166 | /* put a byte to the TX fifo; this should be called with the spinlock held */ |
| 1167 | static void it8709_put_tx_byte(struct ite_dev *dev, u8 value) |
| 1168 | { |
| 1169 | it8709_wr(dev, value, IT85_C0DR); |
| 1170 | } |
| 1171 | |
| 1172 | /* idle the receiver so that we won't receive samples until another |
| 1173 | pulse is detected; this must be called with the device spinlock held */ |
| 1174 | static void it8709_idle_rx(struct ite_dev *dev) |
| 1175 | { |
| 1176 | ite_dbg("%s called", __func__); |
| 1177 | |
| 1178 | /* disable streaming by clearing RXACT writing it as 1 */ |
| 1179 | it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT, |
| 1180 | IT85_C0RCR); |
| 1181 | |
| 1182 | /* clear the FIFO */ |
| 1183 | it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR, |
| 1184 | IT85_C0MSTCR); |
| 1185 | } |
| 1186 | |
| 1187 | /* disable the receiver; this must be called with the device spinlock held */ |
| 1188 | static void it8709_disable_rx(struct ite_dev *dev) |
| 1189 | { |
| 1190 | ite_dbg("%s called", __func__); |
| 1191 | |
| 1192 | /* disable the receiver interrupts */ |
| 1193 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| 1194 | ~(IT85_RDAIE | IT85_RFOIE), |
| 1195 | IT85_C0IER); |
| 1196 | |
| 1197 | /* disable the receiver */ |
| 1198 | it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN, |
| 1199 | IT85_C0RCR); |
| 1200 | |
| 1201 | /* clear the FIFO and RXACT (actually RXACT should have been cleared |
| 1202 | * in the previous it8709_wr(dev, ) call) */ |
| 1203 | it8709_idle_rx(dev); |
| 1204 | } |
| 1205 | |
| 1206 | /* enable the receiver; this must be called with the device spinlock held */ |
| 1207 | static void it8709_enable_rx(struct ite_dev *dev) |
| 1208 | { |
| 1209 | ite_dbg("%s called", __func__); |
| 1210 | |
| 1211 | /* enable the receiver by setting RXEN */ |
| 1212 | it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN, |
| 1213 | IT85_C0RCR); |
| 1214 | |
| 1215 | /* just prepare it to idle for the next reception */ |
| 1216 | it8709_idle_rx(dev); |
| 1217 | |
| 1218 | /* enable the receiver interrupts and master enable flag */ |
| 1219 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) |
| 1220 | |IT85_RDAIE | IT85_RFOIE | IT85_IEC, |
| 1221 | IT85_C0IER); |
| 1222 | } |
| 1223 | |
| 1224 | /* disable the transmitter interrupt; this must be called with the device |
| 1225 | * spinlock held */ |
| 1226 | static void it8709_disable_tx_interrupt(struct ite_dev *dev) |
| 1227 | { |
| 1228 | ite_dbg("%s called", __func__); |
| 1229 | |
| 1230 | /* disable the transmitter interrupts */ |
| 1231 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE, |
| 1232 | IT85_C0IER); |
| 1233 | } |
| 1234 | |
| 1235 | /* enable the transmitter interrupt; this must be called with the device |
| 1236 | * spinlock held */ |
| 1237 | static void it8709_enable_tx_interrupt(struct ite_dev *dev) |
| 1238 | { |
| 1239 | ite_dbg("%s called", __func__); |
| 1240 | |
| 1241 | /* enable the transmitter interrupts and master enable flag */ |
| 1242 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) |
| 1243 | |IT85_TLDLIE | IT85_IEC, |
| 1244 | IT85_C0IER); |
| 1245 | } |
| 1246 | |
| 1247 | /* disable the device; this must be called with the device spinlock held */ |
| 1248 | static void it8709_disable(struct ite_dev *dev) |
| 1249 | { |
| 1250 | ite_dbg("%s called", __func__); |
| 1251 | |
| 1252 | /* clear out all interrupt enable flags */ |
Jarod Wilson | f0c1629 | 2011-05-09 12:01:35 -0300 | [diff] [blame] | 1253 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| 1254 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| 1255 | IT85_C0IER); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1256 | |
| 1257 | /* disable the receiver */ |
| 1258 | it8709_disable_rx(dev); |
| 1259 | |
| 1260 | /* erase the FIFO */ |
| 1261 | it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR), |
| 1262 | IT85_C0MSTCR); |
| 1263 | } |
| 1264 | |
| 1265 | /* initialize the hardware */ |
| 1266 | static void it8709_init_hardware(struct ite_dev *dev) |
| 1267 | { |
| 1268 | ite_dbg("%s called", __func__); |
| 1269 | |
| 1270 | /* disable all the interrupts */ |
Jarod Wilson | f0c1629 | 2011-05-09 12:01:35 -0300 | [diff] [blame] | 1271 | it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & |
| 1272 | ~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE), |
| 1273 | IT85_C0IER); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 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 */ |
Jarod Wilson | f0c1629 | 2011-05-09 12:01:35 -0300 | [diff] [blame] | 1281 | it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) & |
| 1282 | ~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
| 1283 | | IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT, |
| 1284 | IT85_C0MSTCR); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1285 | |
| 1286 | /* program the C0RCR register defaults */ |
Jarod Wilson | f0c1629 | 2011-05-09 12:01:35 -0300 | [diff] [blame] | 1287 | it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) & |
| 1288 | ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT |
| 1289 | | IT85_RXDCR)) | ITE_RXDCR_DEFAULT, |
| 1290 | IT85_C0RCR); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1291 | |
| 1292 | /* program the C0TCR register defaults */ |
Jarod Wilson | f0c1629 | 2011-05-09 12:01:35 -0300 | [diff] [blame] | 1293 | it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW)) |
| 1294 | | IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT |
| 1295 | | IT85_TXMPW_DEFAULT, |
| 1296 | IT85_C0TCR); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1297 | |
| 1298 | /* program the carrier parameters */ |
| 1299 | ite_set_carrier_params(dev); |
| 1300 | } |
| 1301 | |
| 1302 | |
| 1303 | /* generic hardware setup/teardown code */ |
| 1304 | |
| 1305 | /* activate the device for use */ |
| 1306 | static int ite_open(struct rc_dev *rcdev) |
| 1307 | { |
| 1308 | struct ite_dev *dev = rcdev->priv; |
| 1309 | unsigned long flags; |
| 1310 | |
| 1311 | ite_dbg("%s called", __func__); |
| 1312 | |
| 1313 | spin_lock_irqsave(&dev->lock, flags); |
| 1314 | dev->in_use = true; |
| 1315 | |
| 1316 | /* enable the receiver */ |
| 1317 | dev->params.enable_rx(dev); |
| 1318 | |
| 1319 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1320 | |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
| 1324 | /* deactivate the device for use */ |
| 1325 | static void ite_close(struct rc_dev *rcdev) |
| 1326 | { |
| 1327 | struct ite_dev *dev = rcdev->priv; |
| 1328 | unsigned long flags; |
| 1329 | |
| 1330 | ite_dbg("%s called", __func__); |
| 1331 | |
| 1332 | spin_lock_irqsave(&dev->lock, flags); |
| 1333 | dev->in_use = false; |
| 1334 | |
| 1335 | /* wait for any transmission to end */ |
| 1336 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1337 | wait_event_interruptible(dev->tx_ended, !dev->transmitting); |
| 1338 | spin_lock_irqsave(&dev->lock, flags); |
| 1339 | |
| 1340 | dev->params.disable(dev); |
| 1341 | |
| 1342 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1343 | } |
| 1344 | |
| 1345 | /* supported models and their parameters */ |
| 1346 | static const struct ite_dev_params ite_dev_descs[] = { |
| 1347 | { /* 0: ITE8704 */ |
| 1348 | .model = "ITE8704 CIR transceiver", |
| 1349 | .io_region_size = IT87_IOREG_LENGTH, |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1350 | .io_rsrc_no = 0, |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1351 | .hw_tx_capable = true, |
| 1352 | .sample_period = (u32) (1000000000ULL / 115200), |
| 1353 | .tx_carrier_freq = 38000, |
| 1354 | .tx_duty_cycle = 33, |
| 1355 | .rx_low_carrier_freq = 0, |
| 1356 | .rx_high_carrier_freq = 0, |
| 1357 | |
| 1358 | /* operations */ |
| 1359 | .get_irq_causes = it87_get_irq_causes, |
| 1360 | .enable_rx = it87_enable_rx, |
| 1361 | .idle_rx = it87_idle_rx, |
| 1362 | .disable_rx = it87_idle_rx, |
| 1363 | .get_rx_bytes = it87_get_rx_bytes, |
| 1364 | .enable_tx_interrupt = it87_enable_tx_interrupt, |
| 1365 | .disable_tx_interrupt = it87_disable_tx_interrupt, |
| 1366 | .get_tx_used_slots = it87_get_tx_used_slots, |
| 1367 | .put_tx_byte = it87_put_tx_byte, |
| 1368 | .disable = it87_disable, |
| 1369 | .init_hardware = it87_init_hardware, |
| 1370 | .set_carrier_params = it87_set_carrier_params, |
| 1371 | }, |
| 1372 | { /* 1: ITE8713 */ |
| 1373 | .model = "ITE8713 CIR transceiver", |
| 1374 | .io_region_size = IT87_IOREG_LENGTH, |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1375 | .io_rsrc_no = 0, |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1376 | .hw_tx_capable = true, |
| 1377 | .sample_period = (u32) (1000000000ULL / 115200), |
| 1378 | .tx_carrier_freq = 38000, |
| 1379 | .tx_duty_cycle = 33, |
| 1380 | .rx_low_carrier_freq = 0, |
| 1381 | .rx_high_carrier_freq = 0, |
| 1382 | |
| 1383 | /* operations */ |
| 1384 | .get_irq_causes = it87_get_irq_causes, |
| 1385 | .enable_rx = it87_enable_rx, |
| 1386 | .idle_rx = it87_idle_rx, |
| 1387 | .disable_rx = it87_idle_rx, |
| 1388 | .get_rx_bytes = it87_get_rx_bytes, |
| 1389 | .enable_tx_interrupt = it87_enable_tx_interrupt, |
| 1390 | .disable_tx_interrupt = it87_disable_tx_interrupt, |
| 1391 | .get_tx_used_slots = it87_get_tx_used_slots, |
| 1392 | .put_tx_byte = it87_put_tx_byte, |
| 1393 | .disable = it87_disable, |
| 1394 | .init_hardware = it87_init_hardware, |
| 1395 | .set_carrier_params = it87_set_carrier_params, |
| 1396 | }, |
| 1397 | { /* 2: ITE8708 */ |
| 1398 | .model = "ITE8708 CIR transceiver", |
| 1399 | .io_region_size = IT8708_IOREG_LENGTH, |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1400 | .io_rsrc_no = 0, |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1401 | .hw_tx_capable = true, |
| 1402 | .sample_period = (u32) (1000000000ULL / 115200), |
| 1403 | .tx_carrier_freq = 38000, |
| 1404 | .tx_duty_cycle = 33, |
| 1405 | .rx_low_carrier_freq = 0, |
| 1406 | .rx_high_carrier_freq = 0, |
| 1407 | |
| 1408 | /* operations */ |
| 1409 | .get_irq_causes = it8708_get_irq_causes, |
| 1410 | .enable_rx = it8708_enable_rx, |
| 1411 | .idle_rx = it8708_idle_rx, |
| 1412 | .disable_rx = it8708_idle_rx, |
| 1413 | .get_rx_bytes = it8708_get_rx_bytes, |
| 1414 | .enable_tx_interrupt = it8708_enable_tx_interrupt, |
| 1415 | .disable_tx_interrupt = |
| 1416 | it8708_disable_tx_interrupt, |
| 1417 | .get_tx_used_slots = it8708_get_tx_used_slots, |
| 1418 | .put_tx_byte = it8708_put_tx_byte, |
| 1419 | .disable = it8708_disable, |
| 1420 | .init_hardware = it8708_init_hardware, |
| 1421 | .set_carrier_params = it8708_set_carrier_params, |
| 1422 | }, |
| 1423 | { /* 3: ITE8709 */ |
| 1424 | .model = "ITE8709 CIR transceiver", |
| 1425 | .io_region_size = IT8709_IOREG_LENGTH, |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1426 | .io_rsrc_no = 2, |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1427 | .hw_tx_capable = true, |
| 1428 | .sample_period = (u32) (1000000000ULL / 115200), |
| 1429 | .tx_carrier_freq = 38000, |
| 1430 | .tx_duty_cycle = 33, |
| 1431 | .rx_low_carrier_freq = 0, |
| 1432 | .rx_high_carrier_freq = 0, |
| 1433 | |
| 1434 | /* operations */ |
| 1435 | .get_irq_causes = it8709_get_irq_causes, |
| 1436 | .enable_rx = it8709_enable_rx, |
| 1437 | .idle_rx = it8709_idle_rx, |
| 1438 | .disable_rx = it8709_idle_rx, |
| 1439 | .get_rx_bytes = it8709_get_rx_bytes, |
| 1440 | .enable_tx_interrupt = it8709_enable_tx_interrupt, |
| 1441 | .disable_tx_interrupt = |
| 1442 | it8709_disable_tx_interrupt, |
| 1443 | .get_tx_used_slots = it8709_get_tx_used_slots, |
| 1444 | .put_tx_byte = it8709_put_tx_byte, |
| 1445 | .disable = it8709_disable, |
| 1446 | .init_hardware = it8709_init_hardware, |
| 1447 | .set_carrier_params = it8709_set_carrier_params, |
| 1448 | }, |
| 1449 | }; |
| 1450 | |
| 1451 | static const struct pnp_device_id ite_ids[] = { |
| 1452 | {"ITE8704", 0}, /* Default model */ |
| 1453 | {"ITE8713", 1}, /* CIR found in EEEBox 1501U */ |
| 1454 | {"ITE8708", 2}, /* Bridged IT8512 */ |
| 1455 | {"ITE8709", 3}, /* SRAM-Bridged IT8512 */ |
| 1456 | {"", 0}, |
| 1457 | }; |
| 1458 | |
| 1459 | /* allocate memory, probe hardware, and initialize everything */ |
| 1460 | static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id |
| 1461 | *dev_id) |
| 1462 | { |
| 1463 | const struct ite_dev_params *dev_desc = NULL; |
| 1464 | struct ite_dev *itdev = NULL; |
| 1465 | struct rc_dev *rdev = NULL; |
| 1466 | int ret = -ENOMEM; |
| 1467 | int model_no; |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1468 | int io_rsrc_no; |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1469 | |
| 1470 | ite_dbg("%s called", __func__); |
| 1471 | |
| 1472 | itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL); |
| 1473 | if (!itdev) |
| 1474 | return ret; |
| 1475 | |
| 1476 | /* input device for IR remote (and tx) */ |
| 1477 | rdev = rc_allocate_device(); |
| 1478 | if (!rdev) |
| 1479 | goto failure; |
| 1480 | |
| 1481 | ret = -ENODEV; |
| 1482 | |
| 1483 | /* get the model number */ |
| 1484 | model_no = (int)dev_id->driver_data; |
| 1485 | ite_pr(KERN_NOTICE, "Auto-detected model: %s\n", |
| 1486 | ite_dev_descs[model_no].model); |
| 1487 | |
| 1488 | if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) { |
| 1489 | model_no = model_number; |
| 1490 | ite_pr(KERN_NOTICE, "The model has been fixed by a module " |
| 1491 | "parameter."); |
| 1492 | } |
| 1493 | |
| 1494 | ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model); |
| 1495 | |
| 1496 | /* get the description for the device */ |
| 1497 | dev_desc = &ite_dev_descs[model_no]; |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1498 | io_rsrc_no = dev_desc->io_rsrc_no; |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1499 | |
| 1500 | /* validate pnp resources */ |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1501 | if (!pnp_port_valid(pdev, io_rsrc_no) || |
| 1502 | pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) { |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 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 */ |
Jarod Wilson | 35d136c | 2011-06-07 18:45:17 -0300 | [diff] [blame^] | 1513 | itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no); |
Mauro Carvalho Chehab | 2ccb24ff | 2011-03-22 15:12:40 -0300 | [diff] [blame] | 1514 | itdev->cir_irq = pnp_irq(pdev, 0); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 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 | |
| 1616 | failure: |
| 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 | |
| 1629 | static 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 | |
| 1652 | static 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 | |
Jarod Wilson | c812045 | 2011-05-09 16:53:17 -0300 | [diff] [blame] | 1659 | /* wait for any transmission to end */ |
| 1660 | wait_event_interruptible(dev->tx_ended, !dev->transmitting); |
| 1661 | |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1662 | spin_lock_irqsave(&dev->lock, flags); |
| 1663 | |
| 1664 | /* disable all interrupts */ |
| 1665 | dev->params.disable(dev); |
| 1666 | |
| 1667 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1668 | |
| 1669 | return 0; |
| 1670 | } |
| 1671 | |
| 1672 | static int ite_resume(struct pnp_dev *pdev) |
| 1673 | { |
| 1674 | int ret = 0; |
| 1675 | struct ite_dev *dev = pnp_get_drvdata(pdev); |
| 1676 | unsigned long flags; |
| 1677 | |
| 1678 | ite_dbg("%s called", __func__); |
| 1679 | |
| 1680 | spin_lock_irqsave(&dev->lock, flags); |
| 1681 | |
Jarod Wilson | c812045 | 2011-05-09 16:53:17 -0300 | [diff] [blame] | 1682 | /* reinitialize hardware config registers */ |
| 1683 | dev->params.init_hardware(dev); |
| 1684 | /* enable the receiver */ |
| 1685 | dev->params.enable_rx(dev); |
Juan J. Garcia de Soria | 620a32b | 2011-03-16 17:14:52 -0300 | [diff] [blame] | 1686 | |
| 1687 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1688 | |
| 1689 | return ret; |
| 1690 | } |
| 1691 | |
| 1692 | static 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 | |
| 1707 | static 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 | |
| 1717 | int ite_init(void) |
| 1718 | { |
| 1719 | return pnp_register_driver(&ite_driver); |
| 1720 | } |
| 1721 | |
| 1722 | void ite_exit(void) |
| 1723 | { |
| 1724 | pnp_unregister_driver(&ite_driver); |
| 1725 | } |
| 1726 | |
| 1727 | MODULE_DEVICE_TABLE(pnp, ite_ids); |
| 1728 | MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver"); |
| 1729 | |
| 1730 | MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>"); |
| 1731 | MODULE_LICENSE("GPL"); |
| 1732 | |
| 1733 | module_init(ite_init); |
| 1734 | module_exit(ite_exit); |