drivers/media/rc/ene_ir.c

   1 /*
   2  * driver for ENE KB3926 B/C/D/E/F CIR (pnp id: ENE0XXX)
   3  *
   4  * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@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  * Special thanks to:
  22  *   Sami R. <maesesami@gmail.com> for lot of help in debugging and therefore
  23  *    bringing to life support for transmission & learning mode.
  24  *
  25  *   Charlie Andrews <charliethepilot@googlemail.com> for lots of help in
  26  *   bringing up the support of new firmware buffer that is popular
  27  *   on latest notebooks
  28  *
  29  *   ENE for partial device documentation
  30  *
  31  */
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/kernel.h>
  36 #include <linux/module.h>
  37 #include <linux/pnp.h>
  38 #include <linux/io.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/sched.h>
  41 #include <linux/slab.h>
  42 #include <media/rc-core.h>
  43 #include "ene_ir.h"
  44
  45 static int sample_period;
  46 static bool learning_mode_force;
  47 static int debug;
  48 static bool txsim;
  49
  50 static void ene_set_reg_addr(struct ene_device *dev, u16 reg)
  51 {
  52         outb(reg >> 8, dev->hw_io + ENE_ADDR_HI);
  53         outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO);
  54 }
  55
  56 /* read a hardware register */
  57 static u8 ene_read_reg(struct ene_device *dev, u16 reg)
  58 {
  59         u8 retval;
  60         ene_set_reg_addr(dev, reg);
  61         retval = inb(dev->hw_io + ENE_IO);
  62         dbg_regs("reg %04x == %02x", reg, retval);
  63         return retval;
  64 }
  65
  66 /* write a hardware register */
  67 static void ene_write_reg(struct ene_device *dev, u16 reg, u8 value)
  68 {
  69         dbg_regs("reg %04x <- %02x", reg, value);
  70         ene_set_reg_addr(dev, reg);
  71         outb(value, dev->hw_io + ENE_IO);
  72 }
  73
  74 /* Set bits in hardware register */
  75 static void ene_set_reg_mask(struct ene_device *dev, u16 reg, u8 mask)
  76 {
  77         dbg_regs("reg %04x |= %02x", reg, mask);
  78         ene_set_reg_addr(dev, reg);
  79         outb(inb(dev->hw_io + ENE_IO) | mask, dev->hw_io + ENE_IO);
  80 }
  81
  82 /* Clear bits in hardware register */
  83 static void ene_clear_reg_mask(struct ene_device *dev, u16 reg, u8 mask)
  84 {
  85         dbg_regs("reg %04x &= ~%02x ", reg, mask);
  86         ene_set_reg_addr(dev, reg);
  87         outb(inb(dev->hw_io + ENE_IO) & ~mask, dev->hw_io + ENE_IO);
  88 }
  89
  90 /* A helper to set/clear a bit in register according to boolean variable */
  91 static void ene_set_clear_reg_mask(struct ene_device *dev, u16 reg, u8 mask,
  92                                                                 bool set)
  93 {
  94         if (set)
  95                 ene_set_reg_mask(dev, reg, mask);
  96         else
  97                 ene_clear_reg_mask(dev, reg, mask);
  98 }
  99
 100 /* detect hardware features */
 101 static int ene_hw_detect(struct ene_device *dev)
 102 {
 103         u8 chip_major, chip_minor;
 104         u8 hw_revision, old_ver;
 105         u8 fw_reg2, fw_reg1;
 106
 107         ene_clear_reg_mask(dev, ENE_ECSTS, ENE_ECSTS_RSRVD);
 108         chip_major = ene_read_reg(dev, ENE_ECVER_MAJOR);
 109         chip_minor = ene_read_reg(dev, ENE_ECVER_MINOR);
 110         ene_set_reg_mask(dev, ENE_ECSTS, ENE_ECSTS_RSRVD);
 111
 112         hw_revision = ene_read_reg(dev, ENE_ECHV);
 113         old_ver = ene_read_reg(dev, ENE_HW_VER_OLD);
 114
 115         dev->pll_freq = (ene_read_reg(dev, ENE_PLLFRH) << 4) +
 116                 (ene_read_reg(dev, ENE_PLLFRL) >> 4);
 117
 118         if (sample_period != ENE_DEFAULT_SAMPLE_PERIOD)
 119                 dev->rx_period_adjust =
 120                         dev->pll_freq == ENE_DEFAULT_PLL_FREQ ? 2 : 4;
 121
 122         if (hw_revision == 0xFF) {
 123                 pr_warn("device seems to be disabled\n");
 124                 pr_warn("send a mail to lirc-list@lists.sourceforge.net\n");
 125                 pr_warn("please attach output of acpidump and dmidecode\n");
 126                 return -ENODEV;
 127         }
 128
 129         pr_notice("chip is 0x%02x%02x - kbver = 0x%02x, rev = 0x%02x\n",
 130                   chip_major, chip_minor, old_ver, hw_revision);
 131
 132         pr_notice("PLL freq = %d\n", dev->pll_freq);
 133
 134         if (chip_major == 0x33) {
 135                 pr_warn("chips 0x33xx aren't supported\n");
 136                 return -ENODEV;
 137         }
 138
 139         if (chip_major == 0x39 && chip_minor == 0x26 && hw_revision == 0xC0) {
 140                 dev->hw_revision = ENE_HW_C;
 141                 pr_notice("KB3926C detected\n");
 142         } else if (old_ver == 0x24 && hw_revision == 0xC0) {
 143                 dev->hw_revision = ENE_HW_B;
 144                 pr_notice("KB3926B detected\n");
 145         } else {
 146                 dev->hw_revision = ENE_HW_D;
 147                 pr_notice("KB3926D or higher detected\n");
 148         }
 149
 150         /* detect features hardware supports */
 151         if (dev->hw_revision < ENE_HW_C)
 152                 return 0;
 153
 154         fw_reg1 = ene_read_reg(dev, ENE_FW1);
 155         fw_reg2 = ene_read_reg(dev, ENE_FW2);
 156
 157         pr_notice("Firmware regs: %02x %02x\n", fw_reg1, fw_reg2);
 158
 159         dev->hw_use_gpio_0a = !!(fw_reg2 & ENE_FW2_GP0A);
 160         dev->hw_learning_and_tx_capable = !!(fw_reg2 & ENE_FW2_LEARNING);
 161         dev->hw_extra_buffer = !!(fw_reg1 & ENE_FW1_HAS_EXTRA_BUF);
 162
 163         if (dev->hw_learning_and_tx_capable)
 164                 dev->hw_fan_input = !!(fw_reg2 & ENE_FW2_FAN_INPUT);
 165
 166         pr_notice("Hardware features:\n");
 167
 168         if (dev->hw_learning_and_tx_capable) {
 169                 pr_notice("* Supports transmitting & learning mode\n");
 170                 pr_notice("   This feature is rare and therefore,\n");
 171                 pr_notice("   you are welcome to test it,\n");
 172                 pr_notice("   and/or contact the author via:\n");
 173                 pr_notice("   lirc-list@lists.sourceforge.net\n");
 174                 pr_notice("   or maximlevitsky@gmail.com\n");
 175
 176                 pr_notice("* Uses GPIO %s for IR raw input\n",
 177                           dev->hw_use_gpio_0a ? "40" : "0A");
 178
 179                 if (dev->hw_fan_input)
 180                         pr_notice("* Uses unused fan feedback input as source of demodulated IR data\n");
 181         }
 182
 183         if (!dev->hw_fan_input)
 184                 pr_notice("* Uses GPIO %s for IR demodulated input\n",
 185                           dev->hw_use_gpio_0a ? "0A" : "40");
 186
 187         if (dev->hw_extra_buffer)
 188                 pr_notice("* Uses new style input buffer\n");
 189         return 0;
 190 }
 191
 192 /* Read properities of hw sample buffer */
 193 static void ene_rx_setup_hw_buffer(struct ene_device *dev)
 194 {
 195         u16 tmp;
 196
 197         ene_rx_read_hw_pointer(dev);
 198         dev->r_pointer = dev->w_pointer;
 199
 200         if (!dev->hw_extra_buffer) {
 201                 dev->buffer_len = ENE_FW_PACKET_SIZE * 2;
 202                 return;
 203         }
 204
 205         tmp = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER);
 206         tmp |= ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER+1) << 8;
 207         dev->extra_buf1_address = tmp;
 208
 209         dev->extra_buf1_len = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 2);
 210
 211         tmp = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 3);
 212         tmp |= ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 4) << 8;
 213         dev->extra_buf2_address = tmp;
 214
 215         dev->extra_buf2_len = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 5);
 216
 217         dev->buffer_len = dev->extra_buf1_len + dev->extra_buf2_len + 8;
 218
 219         pr_notice("Hardware uses 2 extended buffers:\n");
 220         pr_notice("  0x%04x - len : %d\n",
 221                   dev->extra_buf1_address, dev->extra_buf1_len);
 222         pr_notice("  0x%04x - len : %d\n",
 223                   dev->extra_buf2_address, dev->extra_buf2_len);
 224
 225         pr_notice("Total buffer len = %d\n", dev->buffer_len);
 226
 227         if (dev->buffer_len > 64 || dev->buffer_len < 16)
 228                 goto error;
 229
 230         if (dev->extra_buf1_address > 0xFBFC ||
 231                                         dev->extra_buf1_address < 0xEC00)
 232                 goto error;
 233
 234         if (dev->extra_buf2_address > 0xFBFC ||
 235                                         dev->extra_buf2_address < 0xEC00)
 236                 goto error;
 237
 238         if (dev->r_pointer > dev->buffer_len)
 239                 goto error;
 240
 241         ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
 242         return;
 243 error:
 244         pr_warn("Error validating extra buffers, device probably won't work\n");
 245         dev->hw_extra_buffer = false;
 246         ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
 247 }
 248
 249
 250 /* Restore the pointers to extra buffers - to make module reload work*/
 251 static void ene_rx_restore_hw_buffer(struct ene_device *dev)
 252 {
 253         if (!dev->hw_extra_buffer)
 254                 return;
 255
 256         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 0,
 257                                 dev->extra_buf1_address & 0xFF);
 258         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 1,
 259                                 dev->extra_buf1_address >> 8);
 260         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 2, dev->extra_buf1_len);
 261
 262         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 3,
 263                                 dev->extra_buf2_address & 0xFF);
 264         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 4,
 265                                 dev->extra_buf2_address >> 8);
 266         ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 5,
 267                                 dev->extra_buf2_len);
 268         ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
 269 }
 270
 271 /* Read hardware write pointer */
 272 static void ene_rx_read_hw_pointer(struct ene_device *dev)
 273 {
 274         if (dev->hw_extra_buffer)
 275                 dev->w_pointer = ene_read_reg(dev, ENE_FW_RX_POINTER);
 276         else
 277                 dev->w_pointer = ene_read_reg(dev, ENE_FW2)
 278                         & ENE_FW2_BUF_WPTR ? 0 : ENE_FW_PACKET_SIZE;
 279
 280         dbg_verbose("RB: HW write pointer: %02x, driver read pointer: %02x",
 281                 dev->w_pointer, dev->r_pointer);
 282 }
 283
 284 /* Gets address of next sample from HW ring buffer */
 285 static int ene_rx_get_sample_reg(struct ene_device *dev)
 286 {
 287         int r_pointer;
 288
 289         if (dev->r_pointer == dev->w_pointer) {
 290                 dbg_verbose("RB: hit end, try update w_pointer");
 291                 ene_rx_read_hw_pointer(dev);
 292         }
 293
 294         if (dev->r_pointer == dev->w_pointer) {
 295                 dbg_verbose("RB: end of data at %d", dev->r_pointer);
 296                 return 0;
 297         }
 298
 299         dbg_verbose("RB: reading at offset %d", dev->r_pointer);
 300         r_pointer = dev->r_pointer;
 301
 302         dev->r_pointer++;
 303         if (dev->r_pointer == dev->buffer_len)
 304                 dev->r_pointer = 0;
 305
 306         dbg_verbose("RB: next read will be from offset %d", dev->r_pointer);
 307
 308         if (r_pointer < 8) {
 309                 dbg_verbose("RB: read at main buffer at %d", r_pointer);
 310                 return ENE_FW_SAMPLE_BUFFER + r_pointer;
 311         }
 312
 313         r_pointer -= 8;
 314
 315         if (r_pointer < dev->extra_buf1_len) {
 316                 dbg_verbose("RB: read at 1st extra buffer at %d", r_pointer);
 317                 return dev->extra_buf1_address + r_pointer;
 318         }
 319
 320         r_pointer -= dev->extra_buf1_len;
 321
 322         if (r_pointer < dev->extra_buf2_len) {
 323                 dbg_verbose("RB: read at 2nd extra buffer at %d", r_pointer);
 324                 return dev->extra_buf2_address + r_pointer;
 325         }
 326
 327         dbg("attempt to read beyond ring buffer end");
 328         return 0;
 329 }
 330
 331 /* Sense current received carrier */
 332 void ene_rx_sense_carrier(struct ene_device *dev)
 333 {
 334         DEFINE_IR_RAW_EVENT(ev);
 335
 336         int carrier, duty_cycle;
 337         int period = ene_read_reg(dev, ENE_CIRCAR_PRD);
 338         int hperiod = ene_read_reg(dev, ENE_CIRCAR_HPRD);
 339
 340         if (!(period & ENE_CIRCAR_PRD_VALID))
 341                 return;
 342
 343         period &= ~ENE_CIRCAR_PRD_VALID;
 344
 345         if (!period)
 346                 return;
 347
 348         dbg("RX: hardware carrier period = %02x", period);
 349         dbg("RX: hardware carrier pulse period = %02x", hperiod);
 350
 351         carrier = 2000000 / period;
 352         duty_cycle = (hperiod * 100) / period;
 353         dbg("RX: sensed carrier = %d Hz, duty cycle %d%%",
 354                                                 carrier, duty_cycle);
 355         if (dev->carrier_detect_enabled) {
 356                 ev.carrier_report = true;
 357                 ev.carrier = carrier;
 358                 ev.duty_cycle = duty_cycle;
 359                 ir_raw_event_store(dev->rdev, &ev);
 360         }
 361 }
 362
 363 /* this enables/disables the CIR RX engine */
 364 static void ene_rx_enable_cir_engine(struct ene_device *dev, bool enable)
 365 {
 366         ene_set_clear_reg_mask(dev, ENE_CIRCFG,
 367                         ENE_CIRCFG_RX_EN | ENE_CIRCFG_RX_IRQ, enable);
 368 }
 369
 370 /* this selects input for CIR engine. Ether GPIO 0A or GPIO40*/
 371 static void ene_rx_select_input(struct ene_device *dev, bool gpio_0a)
 372 {
 373         ene_set_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_GPIO0A, gpio_0a);
 374 }
 375
 376 /*
 377  * this enables alternative input via fan tachometer sensor and bypasses
 378  * the hw CIR engine
 379  */
 380 static void ene_rx_enable_fan_input(struct ene_device *dev, bool enable)
 381 {
 382         if (!dev->hw_fan_input)
 383                 return;
 384
 385         if (!enable)
 386                 ene_write_reg(dev, ENE_FAN_AS_IN1, 0);
 387         else {
 388                 ene_write_reg(dev, ENE_FAN_AS_IN1, ENE_FAN_AS_IN1_EN);
 389                 ene_write_reg(dev, ENE_FAN_AS_IN2, ENE_FAN_AS_IN2_EN);
 390         }
 391 }
 392
 393 /* setup the receiver for RX*/
 394 static void ene_rx_setup(struct ene_device *dev)
 395 {
 396         bool learning_mode = dev->learning_mode_enabled ||
 397                                         dev->carrier_detect_enabled;
 398         int sample_period_adjust = 0;
 399
 400         dbg("RX: setup receiver, learning mode = %d", learning_mode);
 401
 402
 403         /* This selects RLC input and clears CFG2 settings */
 404         ene_write_reg(dev, ENE_CIRCFG2, 0x00);
 405
 406         /* set sample period*/
 407         if (sample_period == ENE_DEFAULT_SAMPLE_PERIOD)
 408                 sample_period_adjust =
 409                         dev->pll_freq == ENE_DEFAULT_PLL_FREQ ? 1 : 2;
 410
 411         ene_write_reg(dev, ENE_CIRRLC_CFG,
 412                         (sample_period + sample_period_adjust) |
 413                                                 ENE_CIRRLC_CFG_OVERFLOW);
 414         /* revB doesn't support inputs */
 415         if (dev->hw_revision < ENE_HW_C)
 416                 goto select_timeout;
 417
 418         if (learning_mode) {
 419
 420                 WARN_ON(!dev->hw_learning_and_tx_capable);
 421
 422                 /* Enable the opposite of the normal input
 423                 That means that if GPIO40 is normally used, use GPIO0A
 424                 and vice versa.
 425                 This input will carry non demodulated
 426                 signal, and we will tell the hw to demodulate it itself */
 427                 ene_rx_select_input(dev, !dev->hw_use_gpio_0a);
 428                 dev->rx_fan_input_inuse = false;
 429
 430                 /* Enable carrier demodulation */
 431                 ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD);
 432
 433                 /* Enable carrier detection */
 434                 ene_write_reg(dev, ENE_CIRCAR_PULS, 0x63);
 435                 ene_set_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT,
 436                         dev->carrier_detect_enabled || debug);
 437         } else {
 438                 if (dev->hw_fan_input)
 439                         dev->rx_fan_input_inuse = true;
 440                 else
 441                         ene_rx_select_input(dev, dev->hw_use_gpio_0a);
 442
 443                 /* Disable carrier detection & demodulation */
 444                 ene_clear_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD);
 445                 ene_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT);
 446         }
 447
 448 select_timeout:
 449         if (dev->rx_fan_input_inuse) {
 450                 dev->rdev->rx_resolution = US_TO_NS(ENE_FW_SAMPLE_PERIOD_FAN);
 451
 452                 /* Fan input doesn't support timeouts, it just ends the
 453                         input with a maximum sample */
 454                 dev->rdev->min_timeout = dev->rdev->max_timeout =
 455                         US_TO_NS(ENE_FW_SMPL_BUF_FAN_MSK *
 456                                 ENE_FW_SAMPLE_PERIOD_FAN);
 457         } else {
 458                 dev->rdev->rx_resolution = US_TO_NS(sample_period);
 459
 460                 /* Theoreticly timeout is unlimited, but we cap it
 461                  * because it was seen that on one device, it
 462                  * would stop sending spaces after around 250 msec.
 463                  * Besides, this is close to 2^32 anyway and timeout is u32.
 464                  */
 465                 dev->rdev->min_timeout = US_TO_NS(127 * sample_period);
 466                 dev->rdev->max_timeout = US_TO_NS(200000);
 467         }
 468
 469         if (dev->hw_learning_and_tx_capable)
 470                 dev->rdev->tx_resolution = US_TO_NS(sample_period);
 471
 472         if (dev->rdev->timeout > dev->rdev->max_timeout)
 473                 dev->rdev->timeout = dev->rdev->max_timeout;
 474         if (dev->rdev->timeout < dev->rdev->min_timeout)
 475                 dev->rdev->timeout = dev->rdev->min_timeout;
 476 }
 477
 478 /* Enable the device for receive */
 479 static void ene_rx_enable(struct ene_device *dev)
 480 {
 481         u8 reg_value;
 482
 483         /* Enable system interrupt */
 484         if (dev->hw_revision < ENE_HW_C) {
 485                 ene_write_reg(dev, ENEB_IRQ, dev->irq << 1);
 486                 ene_write_reg(dev, ENEB_IRQ_UNK1, 0x01);
 487         } else {
 488                 reg_value = ene_read_reg(dev, ENE_IRQ) & 0xF0;
 489                 reg_value |= ENE_IRQ_UNK_EN;
 490                 reg_value &= ~ENE_IRQ_STATUS;
 491                 reg_value |= (dev->irq & ENE_IRQ_MASK);
 492                 ene_write_reg(dev, ENE_IRQ, reg_value);
 493         }
 494
 495         /* Enable inputs */
 496         ene_rx_enable_fan_input(dev, dev->rx_fan_input_inuse);
 497         ene_rx_enable_cir_engine(dev, !dev->rx_fan_input_inuse);
 498
 499         /* ack any pending irqs - just in case */
 500         ene_irq_status(dev);
 501
 502         /* enable firmware bits */
 503         ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ);
 504
 505         /* enter idle mode */
 506         ir_raw_event_set_idle(dev->rdev, true);
 507         dev->rx_enabled = true;
 508 }
 509
 510 /* Disable the device receiver */
 511 static void ene_rx_disable(struct ene_device *dev)
 512 {
 513         /* disable inputs */
 514         ene_rx_enable_cir_engine(dev, false);
 515         ene_rx_enable_fan_input(dev, false);
 516
 517         /* disable hardware IRQ and firmware flag */
 518         ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ);
 519
 520         ir_raw_event_set_idle(dev->rdev, true);
 521         dev->rx_enabled = false;
 522 }
 523
 524 /* This resets the receiver. Useful to stop stream of spaces at end of
 525  * transmission
 526  */
 527 static void ene_rx_reset(struct ene_device *dev)
 528 {
 529         ene_clear_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_RX_EN);
 530         ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_RX_EN);
 531 }
 532
 533 /* Set up the TX carrier frequency and duty cycle */
 534 static void ene_tx_set_carrier(struct ene_device *dev)
 535 {
 536         u8 tx_puls_width;
 537         unsigned long flags;
 538
 539         spin_lock_irqsave(&dev->hw_lock, flags);
 540
 541         ene_set_clear_reg_mask(dev, ENE_CIRCFG,
 542                 ENE_CIRCFG_TX_CARR, dev->tx_period > 0);
 543
 544         if (!dev->tx_period)
 545                 goto unlock;
 546
 547         BUG_ON(dev->tx_duty_cycle >= 100 || dev->tx_duty_cycle <= 0);
 548
 549         tx_puls_width = dev->tx_period / (100 / dev->tx_duty_cycle);
 550
 551         if (!tx_puls_width)
 552                 tx_puls_width = 1;
 553
 554         dbg("TX: pulse distance = %d * 500 ns", dev->tx_period);
 555         dbg("TX: pulse width = %d * 500 ns", tx_puls_width);
 556
 557         ene_write_reg(dev, ENE_CIRMOD_PRD, dev->tx_period | ENE_CIRMOD_PRD_POL);
 558         ene_write_reg(dev, ENE_CIRMOD_HPRD, tx_puls_width);
 559 unlock:
 560         spin_unlock_irqrestore(&dev->hw_lock, flags);
 561 }
 562
 563 /* Enable/disable transmitters */
 564 static void ene_tx_set_transmitters(struct ene_device *dev)
 565 {
 566         unsigned long flags;
 567
 568         spin_lock_irqsave(&dev->hw_lock, flags);
 569         ene_set_clear_reg_mask(dev, ENE_GPIOFS8, ENE_GPIOFS8_GPIO41,
 570                                         !!(dev->transmitter_mask & 0x01));
 571         ene_set_clear_reg_mask(dev, ENE_GPIOFS1, ENE_GPIOFS1_GPIO0D,
 572                                         !!(dev->transmitter_mask & 0x02));
 573         spin_unlock_irqrestore(&dev->hw_lock, flags);
 574 }
 575
 576 /* prepare transmission */
 577 static void ene_tx_enable(struct ene_device *dev)
 578 {
 579         u8 conf1 = ene_read_reg(dev, ENE_CIRCFG);
 580         u8 fwreg2 = ene_read_reg(dev, ENE_FW2);
 581
 582         dev->saved_conf1 = conf1;
 583
 584         /* Show information about currently connected transmitter jacks */
 585         if (fwreg2 & ENE_FW2_EMMITER1_CONN)
 586                 dbg("TX: Transmitter #1 is connected");
 587
 588         if (fwreg2 & ENE_FW2_EMMITER2_CONN)
 589                 dbg("TX: Transmitter #2 is connected");
 590
 591         if (!(fwreg2 & (ENE_FW2_EMMITER1_CONN | ENE_FW2_EMMITER2_CONN)))
 592                 pr_warn("TX: transmitter cable isn't connected!\n");
 593
 594         /* disable receive on revc */
 595         if (dev->hw_revision == ENE_HW_C)
 596                 conf1 &= ~ENE_CIRCFG_RX_EN;
 597
 598         /* Enable TX engine */
 599         conf1 |= ENE_CIRCFG_TX_EN | ENE_CIRCFG_TX_IRQ;
 600         ene_write_reg(dev, ENE_CIRCFG, conf1);
 601 }
 602
 603 /* end transmission */
 604 static void ene_tx_disable(struct ene_device *dev)
 605 {
 606         ene_write_reg(dev, ENE_CIRCFG, dev->saved_conf1);
 607         dev->tx_buffer = NULL;
 608 }
 609
 610
 611 /* TX one sample - must be called with dev->hw_lock*/
 612 static void ene_tx_sample(struct ene_device *dev)
 613 {
 614         u8 raw_tx;
 615         u32 sample;
 616         bool pulse = dev->tx_sample_pulse;
 617
 618         if (!dev->tx_buffer) {
 619                 pr_warn("TX: BUG: attempt to transmit NULL buffer\n");
 620                 return;
 621         }
 622
 623         /* Grab next TX sample */
 624         if (!dev->tx_sample) {
 625
 626                 if (dev->tx_pos == dev->tx_len) {
 627                         if (!dev->tx_done) {
 628                                 dbg("TX: no more data to send");
 629                                 dev->tx_done = true;
 630                                 goto exit;
 631                         } else {
 632                                 dbg("TX: last sample sent by hardware");
 633                                 ene_tx_disable(dev);
 634                                 complete(&dev->tx_complete);
 635                                 return;
 636                         }
 637                 }
 638
 639                 sample = dev->tx_buffer[dev->tx_pos++];
 640                 dev->tx_sample_pulse = !dev->tx_sample_pulse;
 641
 642                 dev->tx_sample = DIV_ROUND_CLOSEST(sample, sample_period);
 643
 644                 if (!dev->tx_sample)
 645                         dev->tx_sample = 1;
 646         }
 647
 648         raw_tx = min(dev->tx_sample , (unsigned int)ENE_CIRRLC_OUT_MASK);
 649         dev->tx_sample -= raw_tx;
 650
 651         dbg("TX: sample %8d (%s)", raw_tx * sample_period,
 652                                                 pulse ? "pulse" : "space");
 653         if (pulse)
 654                 raw_tx |= ENE_CIRRLC_OUT_PULSE;
 655
 656         ene_write_reg(dev,
 657                 dev->tx_reg ? ENE_CIRRLC_OUT1 : ENE_CIRRLC_OUT0, raw_tx);
 658
 659         dev->tx_reg = !dev->tx_reg;
 660 exit:
 661         /* simulate TX done interrupt */
 662         if (txsim)
 663                 mod_timer(&dev->tx_sim_timer, jiffies + HZ / 500);
 664 }
 665
 666 /* timer to simulate tx done interrupt */
 667 static void ene_tx_irqsim(unsigned long data)
 668 {
 669         struct ene_device *dev = (struct ene_device *)data;
 670         unsigned long flags;
 671
 672         spin_lock_irqsave(&dev->hw_lock, flags);
 673         ene_tx_sample(dev);
 674         spin_unlock_irqrestore(&dev->hw_lock, flags);
 675 }
 676
 677
 678 /* read irq status and ack it */
 679 static int ene_irq_status(struct ene_device *dev)
 680 {
 681         u8 irq_status;
 682         u8 fw_flags1, fw_flags2;
 683         int retval = 0;
 684
 685         fw_flags2 = ene_read_reg(dev, ENE_FW2);
 686
 687         if (dev->hw_revision < ENE_HW_C) {
 688                 irq_status = ene_read_reg(dev, ENEB_IRQ_STATUS);
 689
 690                 if (!(irq_status & ENEB_IRQ_STATUS_IR))
 691                         return 0;
 692
 693                 ene_clear_reg_mask(dev, ENEB_IRQ_STATUS, ENEB_IRQ_STATUS_IR);
 694                 return ENE_IRQ_RX;
 695         }
 696
 697         irq_status = ene_read_reg(dev, ENE_IRQ);
 698         if (!(irq_status & ENE_IRQ_STATUS))
 699                 return 0;
 700
 701         /* original driver does that twice - a workaround ? */
 702         ene_write_reg(dev, ENE_IRQ, irq_status & ~ENE_IRQ_STATUS);
 703         ene_write_reg(dev, ENE_IRQ, irq_status & ~ENE_IRQ_STATUS);
 704
 705         /* check RX interrupt */
 706         if (fw_flags2 & ENE_FW2_RXIRQ) {
 707                 retval |= ENE_IRQ_RX;
 708                 ene_write_reg(dev, ENE_FW2, fw_flags2 & ~ENE_FW2_RXIRQ);
 709         }
 710
 711         /* check TX interrupt */
 712         fw_flags1 = ene_read_reg(dev, ENE_FW1);
 713         if (fw_flags1 & ENE_FW1_TXIRQ) {
 714                 ene_write_reg(dev, ENE_FW1, fw_flags1 & ~ENE_FW1_TXIRQ);
 715                 retval |= ENE_IRQ_TX;
 716         }
 717
 718         return retval;
 719 }
 720
 721 /* interrupt handler */
 722 static irqreturn_t ene_isr(int irq, void *data)
 723 {
 724         u16 hw_value, reg;
 725         int hw_sample, irq_status;
 726         bool pulse;
 727         unsigned long flags;
 728         irqreturn_t retval = IRQ_NONE;
 729         struct ene_device *dev = (struct ene_device *)data;
 730         DEFINE_IR_RAW_EVENT(ev);
 731
 732         spin_lock_irqsave(&dev->hw_lock, flags);
 733
 734         dbg_verbose("ISR called");
 735         ene_rx_read_hw_pointer(dev);
 736         irq_status = ene_irq_status(dev);
 737
 738         if (!irq_status)
 739                 goto unlock;
 740
 741         retval = IRQ_HANDLED;
 742
 743         if (irq_status & ENE_IRQ_TX) {
 744                 dbg_verbose("TX interrupt");
 745                 if (!dev->hw_learning_and_tx_capable) {
 746                         dbg("TX interrupt on unsupported device!");
 747                         goto unlock;
 748                 }
 749                 ene_tx_sample(dev);
 750         }
 751
 752         if (!(irq_status & ENE_IRQ_RX))
 753                 goto unlock;
 754
 755         dbg_verbose("RX interrupt");
 756
 757         if (dev->hw_learning_and_tx_capable)
 758                 ene_rx_sense_carrier(dev);
 759
 760         /* On hardware that don't support extra buffer we need to trust
 761                 the interrupt and not track the read pointer */
 762         if (!dev->hw_extra_buffer)
 763                 dev->r_pointer = dev->w_pointer == 0 ? ENE_FW_PACKET_SIZE : 0;
 764
 765         while (1) {
 766
 767                 reg = ene_rx_get_sample_reg(dev);
 768
 769                 dbg_verbose("next sample to read at: %04x", reg);
 770                 if (!reg)
 771                         break;
 772
 773                 hw_value = ene_read_reg(dev, reg);
 774
 775                 if (dev->rx_fan_input_inuse) {
 776
 777                         int offset = ENE_FW_SMPL_BUF_FAN - ENE_FW_SAMPLE_BUFFER;
 778
 779                         /* read high part of the sample */
 780                         hw_value |= ene_read_reg(dev, reg + offset) << 8;
 781                         pulse = hw_value & ENE_FW_SMPL_BUF_FAN_PLS;
 782
 783                         /* clear space bit, and other unused bits */
 784                         hw_value &= ENE_FW_SMPL_BUF_FAN_MSK;
 785                         hw_sample = hw_value * ENE_FW_SAMPLE_PERIOD_FAN;
 786
 787                 } else {
 788                         pulse = !(hw_value & ENE_FW_SAMPLE_SPACE);
 789                         hw_value &= ~ENE_FW_SAMPLE_SPACE;
 790                         hw_sample = hw_value * sample_period;
 791
 792                         if (dev->rx_period_adjust) {
 793                                 hw_sample *= 100;
 794                                 hw_sample /= (100 + dev->rx_period_adjust);
 795                         }
 796                 }
 797
 798                 if (!dev->hw_extra_buffer && !hw_sample) {
 799                         dev->r_pointer = dev->w_pointer;
 800                         continue;
 801                 }
 802
 803                 dbg("RX: %d (%s)", hw_sample, pulse ? "pulse" : "space");
 804
 805                 ev.duration = US_TO_NS(hw_sample);
 806                 ev.pulse = pulse;
 807                 ir_raw_event_store_with_filter(dev->rdev, &ev);
 808         }
 809
 810         ir_raw_event_handle(dev->rdev);
 811 unlock:
 812         spin_unlock_irqrestore(&dev->hw_lock, flags);
 813         return retval;
 814 }
 815
 816 /* Initialize default settings */
 817 static void ene_setup_default_settings(struct ene_device *dev)
 818 {
 819         dev->tx_period = 32;
 820         dev->tx_duty_cycle = 50; /*%*/
 821         dev->transmitter_mask = 0x03;
 822         dev->learning_mode_enabled = learning_mode_force;
 823
 824         /* Set reasonable default timeout */
 825         dev->rdev->timeout = US_TO_NS(150000);
 826 }
 827
 828 /* Upload all hardware settings at once. Used at load and resume time */
 829 static void ene_setup_hw_settings(struct ene_device *dev)
 830 {
 831         if (dev->hw_learning_and_tx_capable) {
 832                 ene_tx_set_carrier(dev);
 833                 ene_tx_set_transmitters(dev);
 834         }
 835
 836         ene_rx_setup(dev);
 837 }
 838
 839 /* outside interface: called on first open*/
 840 static int ene_open(struct rc_dev *rdev)
 841 {
 842         struct ene_device *dev = rdev->priv;
 843         unsigned long flags;
 844
 845         spin_lock_irqsave(&dev->hw_lock, flags);
 846         ene_rx_enable(dev);
 847         spin_unlock_irqrestore(&dev->hw_lock, flags);
 848         return 0;
 849 }
 850
 851 /* outside interface: called on device close*/
 852 static void ene_close(struct rc_dev *rdev)
 853 {
 854         struct ene_device *dev = rdev->priv;
 855         unsigned long flags;
 856         spin_lock_irqsave(&dev->hw_lock, flags);
 857
 858         ene_rx_disable(dev);
 859         spin_unlock_irqrestore(&dev->hw_lock, flags);
 860 }
 861
 862 /* outside interface: set transmitter mask */
 863 static int ene_set_tx_mask(struct rc_dev *rdev, u32 tx_mask)
 864 {
 865         struct ene_device *dev = rdev->priv;
 866         dbg("TX: attempt to set transmitter mask %02x", tx_mask);
 867
 868         /* invalid txmask */
 869         if (!tx_mask || tx_mask & ~0x03) {
 870                 dbg("TX: invalid mask");
 871                 /* return count of transmitters */
 872                 return 2;
 873         }
 874
 875         dev->transmitter_mask = tx_mask;
 876         ene_tx_set_transmitters(dev);
 877         return 0;
 878 }
 879
 880 /* outside interface : set tx carrier */
 881 static int ene_set_tx_carrier(struct rc_dev *rdev, u32 carrier)
 882 {
 883         struct ene_device *dev = rdev->priv;
 884         u32 period;
 885
 886         dbg("TX: attempt to set tx carrier to %d kHz", carrier);
 887         if (carrier == 0)
 888                 return -EINVAL;
 889
 890         period = 2000000 / carrier;
 891         if (period && (period > ENE_CIRMOD_PRD_MAX ||
 892                         period < ENE_CIRMOD_PRD_MIN)) {
 893
 894                 dbg("TX: out of range %d-%d kHz carrier",
 895                         2000 / ENE_CIRMOD_PRD_MIN, 2000 / ENE_CIRMOD_PRD_MAX);
 896                 return -1;
 897         }
 898
 899         dev->tx_period = period;
 900         ene_tx_set_carrier(dev);
 901         return 0;
 902 }
 903
 904 /*outside interface : set tx duty cycle */
 905 static int ene_set_tx_duty_cycle(struct rc_dev *rdev, u32 duty_cycle)
 906 {
 907         struct ene_device *dev = rdev->priv;
 908         dbg("TX: setting duty cycle to %d%%", duty_cycle);
 909         dev->tx_duty_cycle = duty_cycle;
 910         ene_tx_set_carrier(dev);
 911         return 0;
 912 }
 913
 914 /* outside interface: enable learning mode */
 915 static int ene_set_learning_mode(struct rc_dev *rdev, int enable)
 916 {
 917         struct ene_device *dev = rdev->priv;
 918         unsigned long flags;
 919         if (enable == dev->learning_mode_enabled)
 920                 return 0;
 921
 922         spin_lock_irqsave(&dev->hw_lock, flags);
 923         dev->learning_mode_enabled = enable;
 924         ene_rx_disable(dev);
 925         ene_rx_setup(dev);
 926         ene_rx_enable(dev);
 927         spin_unlock_irqrestore(&dev->hw_lock, flags);
 928         return 0;
 929 }
 930
 931 static int ene_set_carrier_report(struct rc_dev *rdev, int enable)
 932 {
 933         struct ene_device *dev = rdev->priv;
 934         unsigned long flags;
 935
 936         if (enable == dev->carrier_detect_enabled)
 937                 return 0;
 938
 939         spin_lock_irqsave(&dev->hw_lock, flags);
 940         dev->carrier_detect_enabled = enable;
 941         ene_rx_disable(dev);
 942         ene_rx_setup(dev);
 943         ene_rx_enable(dev);
 944         spin_unlock_irqrestore(&dev->hw_lock, flags);
 945         return 0;
 946 }
 947
 948 /* outside interface: enable or disable idle mode */
 949 static void ene_set_idle(struct rc_dev *rdev, bool idle)
 950 {
 951         struct ene_device *dev = rdev->priv;
 952
 953         if (idle) {
 954                 ene_rx_reset(dev);
 955                 dbg("RX: end of data");
 956         }
 957 }
 958
 959 /* outside interface: transmit */
 960 static int ene_transmit(struct rc_dev *rdev, unsigned *buf, unsigned n)
 961 {
 962         struct ene_device *dev = rdev->priv;
 963         unsigned long flags;
 964
 965         dev->tx_buffer = buf;
 966         dev->tx_len = n;
 967         dev->tx_pos = 0;
 968         dev->tx_reg = 0;
 969         dev->tx_done = 0;
 970         dev->tx_sample = 0;
 971         dev->tx_sample_pulse = 0;
 972
 973         dbg("TX: %d samples", dev->tx_len);
 974
 975         spin_lock_irqsave(&dev->hw_lock, flags);
 976
 977         ene_tx_enable(dev);
 978
 979         /* Transmit first two samples */
 980         ene_tx_sample(dev);
 981         ene_tx_sample(dev);
 982
 983         spin_unlock_irqrestore(&dev->hw_lock, flags);
 984
 985         if (wait_for_completion_timeout(&dev->tx_complete, 2 * HZ) == 0) {
 986                 dbg("TX: timeout");
 987                 spin_lock_irqsave(&dev->hw_lock, flags);
 988                 ene_tx_disable(dev);
 989                 spin_unlock_irqrestore(&dev->hw_lock, flags);
 990         } else
 991                 dbg("TX: done");
 992         return n;
 993 }
 994
 995 /* probe entry */
 996 static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 997 {
 998         int error = -ENOMEM;
 999         struct rc_dev *rdev;
1000         struct ene_device *dev;
1001
1002         /* allocate memory */
1003         dev = kzalloc(sizeof(struct ene_device), GFP_KERNEL);
1004         rdev = rc_allocate_device();
1005         if (!dev || !rdev)
1006                 goto error1;
1007
1008         /* validate resources */
1009         error = -ENODEV;
1010
1011         /* init these to -1, as 0 is valid for both */
1012         dev->hw_io = -1;
1013         dev->irq = -1;
1014
1015         if (!pnp_port_valid(pnp_dev, 0) ||
1016             pnp_port_len(pnp_dev, 0) < ENE_IO_SIZE)
1017                 goto error;
1018
1019         if (!pnp_irq_valid(pnp_dev, 0))
1020                 goto error;
1021
1022         spin_lock_init(&dev->hw_lock);
1023
1024         dev->hw_io = pnp_port_start(pnp_dev, 0);
1025
1026         pnp_set_drvdata(pnp_dev, dev);
1027         dev->pnp_dev = pnp_dev;
1028
1029         /* don't allow too short/long sample periods */
1030         if (sample_period < 5 || sample_period > 0x7F)
1031                 sample_period = ENE_DEFAULT_SAMPLE_PERIOD;
1032
1033         /* detect hardware version and features */
1034         error = ene_hw_detect(dev);
1035         if (error)
1036                 goto error;
1037
1038         if (!dev->hw_learning_and_tx_capable && txsim) {
1039                 dev->hw_learning_and_tx_capable = true;
1040                 setup_timer(&dev->tx_sim_timer, ene_tx_irqsim,
1041                                                 (long unsigned int)dev);
1042                 pr_warn("Simulation of TX activated\n");
1043         }
1044
1045         if (!dev->hw_learning_and_tx_capable)
1046                 learning_mode_force = false;
1047
1048         rdev->driver_type = RC_DRIVER_IR_RAW;
1049         rdev->allowed_protos = RC_TYPE_ALL;
1050         rdev->priv = dev;
1051         rdev->open = ene_open;
1052         rdev->close = ene_close;
1053         rdev->s_idle = ene_set_idle;
1054         rdev->driver_name = ENE_DRIVER_NAME;
1055         rdev->map_name = RC_MAP_RC6_MCE;
1056         rdev->input_name = "ENE eHome Infrared Remote Receiver";
1057
1058         if (dev->hw_learning_and_tx_capable) {
1059                 rdev->s_learning_mode = ene_set_learning_mode;
1060                 init_completion(&dev->tx_complete);
1061                 rdev->tx_ir = ene_transmit;
1062                 rdev->s_tx_mask = ene_set_tx_mask;
1063                 rdev->s_tx_carrier = ene_set_tx_carrier;
1064                 rdev->s_tx_duty_cycle = ene_set_tx_duty_cycle;
1065                 rdev->s_carrier_report = ene_set_carrier_report;
1066                 rdev->input_name = "ENE eHome Infrared Remote Transceiver";
1067         }
1068
1069         dev->rdev = rdev;
1070
1071         ene_rx_setup_hw_buffer(dev);
1072         ene_setup_default_settings(dev);
1073         ene_setup_hw_settings(dev);
1074
1075         device_set_wakeup_capable(&pnp_dev->dev, true);
1076         device_set_wakeup_enable(&pnp_dev->dev, true);
1077
1078         /* claim the resources */
1079         error = -EBUSY;
1080         if (!request_region(dev->hw_io, ENE_IO_SIZE, ENE_DRIVER_NAME)) {
1081                 dev->hw_io = -1;
1082                 dev->irq = -1;
1083                 goto error;
1084         }
1085
1086         dev->irq = pnp_irq(pnp_dev, 0);
1087         if (request_irq(dev->irq, ene_isr,
1088                         IRQF_SHARED, ENE_DRIVER_NAME, (void *)dev)) {
1089                 dev->irq = -1;
1090                 goto error;
1091         }
1092
1093         error = rc_register_device(rdev);
1094         if (error < 0)
1095                 goto error;
1096
1097         pr_notice("driver has been successfully loaded\n");
1098         return 0;
1099 error:
1100         if (dev && dev->irq >= 0)
1101                 free_irq(dev->irq, dev);
1102         if (dev && dev->hw_io >= 0)
1103                 release_region(dev->hw_io, ENE_IO_SIZE);
1104 error1:
1105         rc_free_device(rdev);
1106         kfree(dev);
1107         return error;
1108 }
1109
1110 /* main unload function */
1111 static void ene_remove(struct pnp_dev *pnp_dev)
1112 {
1113         struct ene_device *dev = pnp_get_drvdata(pnp_dev);
1114         unsigned long flags;
1115
1116         spin_lock_irqsave(&dev->hw_lock, flags);
1117         ene_rx_disable(dev);
1118         ene_rx_restore_hw_buffer(dev);
1119         spin_unlock_irqrestore(&dev->hw_lock, flags);
1120
1121         free_irq(dev->irq, dev);
1122         release_region(dev->hw_io, ENE_IO_SIZE);
1123         rc_unregister_device(dev->rdev);
1124         kfree(dev);
1125 }
1126
1127 /* enable wake on IR (wakes on specific button on original remote) */
1128 static void ene_enable_wake(struct ene_device *dev, int enable)
1129 {
1130         enable = enable && device_may_wakeup(&dev->pnp_dev->dev);
1131         dbg("wake on IR %s", enable ? "enabled" : "disabled");
1132         ene_set_clear_reg_mask(dev, ENE_FW1, ENE_FW1_WAKE, enable);
1133 }
1134
1135 #ifdef CONFIG_PM
1136 static int ene_suspend(struct pnp_dev *pnp_dev, pm_message_t state)
1137 {
1138         struct ene_device *dev = pnp_get_drvdata(pnp_dev);
1139         ene_enable_wake(dev, true);
1140
1141         /* TODO: add support for wake pattern */
1142         return 0;
1143 }
1144
1145 static int ene_resume(struct pnp_dev *pnp_dev)
1146 {
1147         struct ene_device *dev = pnp_get_drvdata(pnp_dev);
1148         ene_setup_hw_settings(dev);
1149
1150         if (dev->rx_enabled)
1151                 ene_rx_enable(dev);
1152
1153         ene_enable_wake(dev, false);
1154         return 0;
1155 }
1156 #endif
1157
1158 static void ene_shutdown(struct pnp_dev *pnp_dev)
1159 {
1160         struct ene_device *dev = pnp_get_drvdata(pnp_dev);
1161         ene_enable_wake(dev, true);
1162 }
1163
1164 static const struct pnp_device_id ene_ids[] = {
1165         {.id = "ENE0100",},
1166         {.id = "ENE0200",},
1167         {.id = "ENE0201",},
1168         {.id = "ENE0202",},
1169         {},
1170 };
1171
1172 static struct pnp_driver ene_driver = {
1173         .name = ENE_DRIVER_NAME,
1174         .id_table = ene_ids,
1175         .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1176
1177         .probe = ene_probe,
1178         .remove = __devexit_p(ene_remove),
1179 #ifdef CONFIG_PM
1180         .suspend = ene_suspend,
1181         .resume = ene_resume,
1182 #endif
1183         .shutdown = ene_shutdown,
1184 };
1185
1186 static int __init ene_init(void)
1187 {
1188         return pnp_register_driver(&ene_driver);
1189 }
1190
1191 static void ene_exit(void)
1192 {
1193         pnp_unregister_driver(&ene_driver);
1194 }
1195
1196 module_param(sample_period, int, S_IRUGO);
1197 MODULE_PARM_DESC(sample_period, "Hardware sample period (50 us default)");
1198
1199 module_param(learning_mode_force, bool, S_IRUGO);
1200 MODULE_PARM_DESC(learning_mode_force, "Enable learning mode by default");
1201
1202 module_param(debug, int, S_IRUGO | S_IWUSR);
1203 MODULE_PARM_DESC(debug, "Debug level");
1204
1205 module_param(txsim, bool, S_IRUGO);
1206 MODULE_PARM_DESC(txsim,
1207         "Simulate TX features on unsupported hardware (dangerous)");
1208
1209 MODULE_DEVICE_TABLE(pnp, ene_ids);
1210 MODULE_DESCRIPTION
1211         ("Infrared input driver for KB3926B/C/D/E/F "
1212         "(aka ENE0100/ENE0200/ENE0201/ENE0202) CIR port");
1213
1214 MODULE_AUTHOR("Maxim Levitsky");
1215 MODULE_LICENSE("GPL");
1216
1217 module_init(ene_init);
1218 module_exit(ene_exit);