LXR linux/drivers/media/rc/winbond-cir.c

   1/*
   2 *  winbond-cir.c - Driver for the Consumer IR functionality of Winbond
   3 *                  SuperI/O chips.
   4 *
   5 *  Currently supports the Winbond WPCD376i chip (PNP id WEC1022), but
   6 *  could probably support others (Winbond WEC102X, NatSemi, etc)
   7 *  with minor modifications.
   8 *
   9 *  Original Author: David Härdeman <david@hardeman.nu>
  10 *     Copyright (C) 2012 Sean Young <sean@mess.org>
  11 *     Copyright (C) 2009 - 2011 David Härdeman <david@hardeman.nu>
  12 *
  13 *  Dedicated to my daughter Matilda, without whose loving attention this
  14 *  driver would have been finished in half the time and with a fraction
  15 *  of the bugs.
  16 *
  17 *  Written using:
  18 *    o Winbond WPCD376I datasheet helpfully provided by Jesse Barnes at Intel
  19 *    o NatSemi PC87338/PC97338 datasheet (for the serial port stuff)
  20 *    o DSDT dumps
  21 *
  22 *  Supported features:
  23 *    o IR Receive
  24 *    o IR Transmit
  25 *    o Wake-On-CIR functionality
  26 *    o Carrier detection
  27 *
  28 *  This program is free software; you can redistribute it and/or modify
  29 *  it under the terms of the GNU General Public License as published by
  30 *  the Free Software Foundation; either version 2 of the License, or
  31 *  (at your option) any later version.
  32 *
  33 *  This program is distributed in the hope that it will be useful,
  34 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  35 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  36 *  GNU General Public License for more details.
  37 */
  38
  39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  40
  41#include <linux/module.h>
  42#include <linux/pnp.h>
  43#include <linux/interrupt.h>
  44#include <linux/timer.h>
  45#include <linux/leds.h>
  46#include <linux/spinlock.h>
  47#include <linux/pci_ids.h>
  48#include <linux/io.h>
  49#include <linux/bitrev.h>
  50#include <linux/slab.h>
  51#include <linux/wait.h>
  52#include <linux/sched.h>
  53#include <media/rc-core.h>
  54
  55#define DRVNAME "winbond-cir"
  56
  57/* CEIR Wake-Up Registers, relative to data->wbase                      */
  58#define WBCIR_REG_WCEIR_CTL     0x03 /* CEIR Receiver Control           */
  59#define WBCIR_REG_WCEIR_STS     0x04 /* CEIR Receiver Status            */
  60#define WBCIR_REG_WCEIR_EV_EN   0x05 /* CEIR Receiver Event Enable      */
  61#define WBCIR_REG_WCEIR_CNTL    0x06 /* CEIR Receiver Counter Low       */
  62#define WBCIR_REG_WCEIR_CNTH    0x07 /* CEIR Receiver Counter High      */
  63#define WBCIR_REG_WCEIR_INDEX   0x08 /* CEIR Receiver Index             */
  64#define WBCIR_REG_WCEIR_DATA    0x09 /* CEIR Receiver Data              */
  65#define WBCIR_REG_WCEIR_CSL     0x0A /* CEIR Re. Compare Strlen         */
  66#define WBCIR_REG_WCEIR_CFG1    0x0B /* CEIR Re. Configuration 1        */
  67#define WBCIR_REG_WCEIR_CFG2    0x0C /* CEIR Re. Configuration 2        */
  68
  69/* CEIR Enhanced Functionality Registers, relative to data->ebase       */
  70#define WBCIR_REG_ECEIR_CTS     0x00 /* Enhanced IR Control Status      */
  71#define WBCIR_REG_ECEIR_CCTL    0x01 /* Infrared Counter Control        */
  72#define WBCIR_REG_ECEIR_CNT_LO  0x02 /* Infrared Counter LSB            */
  73#define WBCIR_REG_ECEIR_CNT_HI  0x03 /* Infrared Counter MSB            */
  74#define WBCIR_REG_ECEIR_IREM    0x04 /* Infrared Emitter Status         */
  75
  76/* SP3 Banked Registers, relative to data->sbase                        */
  77#define WBCIR_REG_SP3_BSR       0x03 /* Bank Select, all banks          */
  78                                      /* Bank 0                         */
  79#define WBCIR_REG_SP3_RXDATA    0x00 /* FIFO RX data (r)                */
  80#define WBCIR_REG_SP3_TXDATA    0x00 /* FIFO TX data (w)                */
  81#define WBCIR_REG_SP3_IER       0x01 /* Interrupt Enable                */
  82#define WBCIR_REG_SP3_EIR       0x02 /* Event Identification (r)        */
  83#define WBCIR_REG_SP3_FCR       0x02 /* FIFO Control (w)                */
  84#define WBCIR_REG_SP3_MCR       0x04 /* Mode Control                    */
  85#define WBCIR_REG_SP3_LSR       0x05 /* Link Status                     */
  86#define WBCIR_REG_SP3_MSR       0x06 /* Modem Status                    */
  87#define WBCIR_REG_SP3_ASCR      0x07 /* Aux Status and Control          */
  88                                      /* Bank 2                         */
  89#define WBCIR_REG_SP3_BGDL      0x00 /* Baud Divisor LSB                */
  90#define WBCIR_REG_SP3_BGDH      0x01 /* Baud Divisor MSB                */
  91#define WBCIR_REG_SP3_EXCR1     0x02 /* Extended Control 1              */
  92#define WBCIR_REG_SP3_EXCR2     0x04 /* Extended Control 2              */
  93#define WBCIR_REG_SP3_TXFLV     0x06 /* TX FIFO Level                   */
  94#define WBCIR_REG_SP3_RXFLV     0x07 /* RX FIFO Level                   */
  95                                      /* Bank 3                         */
  96#define WBCIR_REG_SP3_MRID      0x00 /* Module Identification           */
  97#define WBCIR_REG_SP3_SH_LCR    0x01 /* LCR Shadow                      */
  98#define WBCIR_REG_SP3_SH_FCR    0x02 /* FCR Shadow                      */
  99                                      /* Bank 4                         */
 100#define WBCIR_REG_SP3_IRCR1     0x02 /* Infrared Control 1              */
 101                                      /* Bank 5                         */
 102#define WBCIR_REG_SP3_IRCR2     0x04 /* Infrared Control 2              */
 103                                      /* Bank 6                         */
 104#define WBCIR_REG_SP3_IRCR3     0x00 /* Infrared Control 3              */
 105#define WBCIR_REG_SP3_SIR_PW    0x02 /* SIR Pulse Width                 */
 106                                      /* Bank 7                         */
 107#define WBCIR_REG_SP3_IRRXDC    0x00 /* IR RX Demod Control             */
 108#define WBCIR_REG_SP3_IRTXMC    0x01 /* IR TX Mod Control               */
 109#define WBCIR_REG_SP3_RCCFG     0x02 /* CEIR Config                     */
 110#define WBCIR_REG_SP3_IRCFG1    0x04 /* Infrared Config 1               */
 111#define WBCIR_REG_SP3_IRCFG4    0x07 /* Infrared Config 4               */
 112
 113/*
 114 * Magic values follow
 115 */
 116
 117/* No interrupts for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
 118#define WBCIR_IRQ_NONE          0x00
 119/* RX data bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
 120#define WBCIR_IRQ_RX            0x01
 121/* TX data low bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
 122#define WBCIR_IRQ_TX_LOW        0x02
 123/* Over/Under-flow bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
 124#define WBCIR_IRQ_ERR           0x04
 125/* TX data empty bit for WBCEIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
 126#define WBCIR_IRQ_TX_EMPTY      0x20
 127/* Led enable/disable bit for WBCIR_REG_ECEIR_CTS */
 128#define WBCIR_LED_ENABLE        0x80
 129/* RX data available bit for WBCIR_REG_SP3_LSR */
 130#define WBCIR_RX_AVAIL          0x01
 131/* RX data overrun error bit for WBCIR_REG_SP3_LSR */
 132#define WBCIR_RX_OVERRUN        0x02
 133/* TX End-Of-Transmission bit for WBCIR_REG_SP3_ASCR */
 134#define WBCIR_TX_EOT            0x04
 135/* RX disable bit for WBCIR_REG_SP3_ASCR */
 136#define WBCIR_RX_DISABLE        0x20
 137/* TX data underrun error bit for WBCIR_REG_SP3_ASCR */
 138#define WBCIR_TX_UNDERRUN       0x40
 139/* Extended mode enable bit for WBCIR_REG_SP3_EXCR1 */
 140#define WBCIR_EXT_ENABLE        0x01
 141/* Select compare register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
 142#define WBCIR_REGSEL_COMPARE    0x10
 143/* Select mask register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
 144#define WBCIR_REGSEL_MASK       0x20
 145/* Starting address of selected register in WBCIR_REG_WCEIR_INDEX */
 146#define WBCIR_REG_ADDR0         0x00
 147/* Enable carrier counter */
 148#define WBCIR_CNTR_EN           0x01
 149/* Reset carrier counter */
 150#define WBCIR_CNTR_R            0x02
 151/* Invert TX */
 152#define WBCIR_IRTX_INV          0x04
 153/* Receiver oversampling */
 154#define WBCIR_RX_T_OV           0x40
 155
 156/* Valid banks for the SP3 UART */
 157enum wbcir_bank {
 158        WBCIR_BANK_0          = 0x00,
 159        WBCIR_BANK_1          = 0x80,
 160        WBCIR_BANK_2          = 0xE0,
 161        WBCIR_BANK_3          = 0xE4,
 162        WBCIR_BANK_4          = 0xE8,
 163        WBCIR_BANK_5          = 0xEC,
 164        WBCIR_BANK_6          = 0xF0,
 165        WBCIR_BANK_7          = 0xF4,
 166};
 167
 168/* Supported power-on IR Protocols */
 169enum wbcir_protocol {
 170        IR_PROTOCOL_RC5          = 0x0,
 171        IR_PROTOCOL_NEC          = 0x1,
 172        IR_PROTOCOL_RC6          = 0x2,
 173};
 174
 175/* Possible states for IR reception */
 176enum wbcir_rxstate {
 177        WBCIR_RXSTATE_INACTIVE = 0,
 178        WBCIR_RXSTATE_ACTIVE,
 179        WBCIR_RXSTATE_ERROR
 180};
 181
 182/* Possible states for IR transmission */
 183enum wbcir_txstate {
 184        WBCIR_TXSTATE_INACTIVE = 0,
 185        WBCIR_TXSTATE_ACTIVE,
 186        WBCIR_TXSTATE_ERROR
 187};
 188
 189/* Misc */
 190#define WBCIR_NAME      "Winbond CIR"
 191#define WBCIR_ID_FAMILY          0xF1 /* Family ID for the WPCD376I     */
 192#define WBCIR_ID_CHIP            0x04 /* Chip ID for the WPCD376I       */
 193#define WAKEUP_IOMEM_LEN         0x10 /* Wake-Up I/O Reg Len            */
 194#define EHFUNC_IOMEM_LEN         0x10 /* Enhanced Func I/O Reg Len      */
 195#define SP_IOMEM_LEN             0x08 /* Serial Port 3 (IR) Reg Len     */
 196
 197/* Per-device data */
 198struct wbcir_data {
 199        spinlock_t spinlock;
 200        struct rc_dev *dev;
 201        struct led_classdev led;
 202
 203        unsigned long wbase;        /* Wake-Up Baseaddr         */
 204        unsigned long ebase;        /* Enhanced Func. Baseaddr  */
 205        unsigned long sbase;        /* Serial Port Baseaddr     */
 206        unsigned int  irq;          /* Serial Port IRQ          */
 207        u8 irqmask;
 208
 209        /* RX state */
 210        enum wbcir_rxstate rxstate;
 211        int carrier_report_enabled;
 212        u32 pulse_duration;
 213
 214        /* TX state */
 215        enum wbcir_txstate txstate;
 216        u32 txlen;
 217        u32 txoff;
 218        u32 *txbuf;
 219        u8 txmask;
 220        u32 txcarrier;
 221};
 222
 223static bool invert; /* default = 0 */
 224module_param(invert, bool, 0444);
 225MODULE_PARM_DESC(invert, "Invert the signal from the IR receiver");
 226
 227static bool txandrx; /* default = 0 */
 228module_param(txandrx, bool, 0444);
 229MODULE_PARM_DESC(txandrx, "Allow simultaneous TX and RX");
 230
 231
 232/*****************************************************************************
 233 *
 234 * UTILITY FUNCTIONS
 235 *
 236 *****************************************************************************/
 237
 238/* Caller needs to hold wbcir_lock */
 239static void
 240wbcir_set_bits(unsigned long addr, u8 bits, u8 mask)
 241{
 242        u8 val;
 243
 244        val = inb(addr);
 245        val = ((val & ~mask) | (bits & mask));
 246        outb(val, addr);
 247}
 248
 249/* Selects the register bank for the serial port */
 250static inline void
 251wbcir_select_bank(struct wbcir_data *data, enum wbcir_bank bank)
 252{
 253        outb(bank, data->sbase + WBCIR_REG_SP3_BSR);
 254}
 255
 256static inline void
 257wbcir_set_irqmask(struct wbcir_data *data, u8 irqmask)
 258{
 259        if (data->irqmask == irqmask)
 260                return;
 261
 262        wbcir_select_bank(data, WBCIR_BANK_0);
 263        outb(irqmask, data->sbase + WBCIR_REG_SP3_IER);
 264        data->irqmask = irqmask;
 265}
 266
 267static enum led_brightness
 268wbcir_led_brightness_get(struct led_classdev *led_cdev)
 269{
 270        struct wbcir_data *data = container_of(led_cdev,
 271                                               struct wbcir_data,
 272                                               led);
 273
 274        if (inb(data->ebase + WBCIR_REG_ECEIR_CTS) & WBCIR_LED_ENABLE)
 275                return LED_FULL;
 276        else
 277                return LED_OFF;
 278}
 279
 280static void
 281wbcir_led_brightness_set(struct led_classdev *led_cdev,
 282                         enum led_brightness brightness)
 283{
 284        struct wbcir_data *data = container_of(led_cdev,
 285                                               struct wbcir_data,
 286                                               led);
 287
 288        wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS,
 289                       brightness == LED_OFF ? 0x00 : WBCIR_LED_ENABLE,
 290                       WBCIR_LED_ENABLE);
 291}
 292
 293/* Manchester encodes bits to RC6 message cells (see wbcir_shutdown) */
 294static u8
 295wbcir_to_rc6cells(u8 val)
 296{
 297        u8 coded = 0x00;
 298        int i;
 299
 300        val &= 0x0F;
 301        for (i = 0; i < 4; i++) {
 302                if (val & 0x01)
 303                        coded |= 0x02 << (i * 2);
 304                else
 305                        coded |= 0x01 << (i * 2);
 306                val >>= 1;
 307        }
 308
 309        return coded;
 310}
 311
 312/*****************************************************************************
 313 *
 314 * INTERRUPT FUNCTIONS
 315 *
 316 *****************************************************************************/
 317
 318static void
 319wbcir_carrier_report(struct wbcir_data *data)
 320{
 321        unsigned counter = inb(data->ebase + WBCIR_REG_ECEIR_CNT_LO) |
 322                        inb(data->ebase + WBCIR_REG_ECEIR_CNT_HI) << 8;
 323
 324        if (counter > 0 && counter < 0xffff) {
 325                DEFINE_IR_RAW_EVENT(ev);
 326
 327                ev.carrier_report = 1;
 328                ev.carrier = DIV_ROUND_CLOSEST(counter * 1000000u,
 329                                                data->pulse_duration);
 330
 331                ir_raw_event_store(data->dev, &ev);
 332        }
 333
 334        /* reset and restart the counter */
 335        data->pulse_duration = 0;
 336        wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
 337                                                WBCIR_CNTR_EN | WBCIR_CNTR_R);
 338        wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_EN,
 339                                                WBCIR_CNTR_EN | WBCIR_CNTR_R);
 340}
 341
 342static void
 343wbcir_idle_rx(struct rc_dev *dev, bool idle)
 344{
 345        struct wbcir_data *data = dev->priv;
 346
 347        if (!idle && data->rxstate == WBCIR_RXSTATE_INACTIVE)
 348                data->rxstate = WBCIR_RXSTATE_ACTIVE;
 349
 350        if (idle && data->rxstate != WBCIR_RXSTATE_INACTIVE) {
 351                data->rxstate = WBCIR_RXSTATE_INACTIVE;
 352
 353                if (data->carrier_report_enabled)
 354                        wbcir_carrier_report(data);
 355
 356                /* Tell hardware to go idle by setting RXINACTIVE */
 357                outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);
 358        }
 359}
 360
 361static void
 362wbcir_irq_rx(struct wbcir_data *data, struct pnp_dev *device)
 363{
 364        u8 irdata;
 365        DEFINE_IR_RAW_EVENT(rawir);
 366        unsigned duration;
 367
 368        /* Since RXHDLEV is set, at least 8 bytes are in the FIFO */
 369        while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL) {
 370                irdata = inb(data->sbase + WBCIR_REG_SP3_RXDATA);
 371                if (data->rxstate == WBCIR_RXSTATE_ERROR)
 372                        continue;
 373
 374                duration = ((irdata & 0x7F) + 1) *
 375                        (data->carrier_report_enabled ? 2 : 10);
 376                rawir.pulse = irdata & 0x80 ? false : true;
 377                rawir.duration = US_TO_NS(duration);
 378
 379                if (rawir.pulse)
 380                        data->pulse_duration += duration;
 381
 382                ir_raw_event_store_with_filter(data->dev, &rawir);
 383        }
 384
 385        ir_raw_event_handle(data->dev);
 386}
 387
 388static void
 389wbcir_irq_tx(struct wbcir_data *data)
 390{
 391        unsigned int space;
 392        unsigned int used;
 393        u8 bytes[16];
 394        u8 byte;
 395
 396        if (!data->txbuf)
 397                return;
 398
 399        switch (data->txstate) {
 400        case WBCIR_TXSTATE_INACTIVE:
 401                /* TX FIFO empty */
 402                space = 16;
 403                break;
 404        case WBCIR_TXSTATE_ACTIVE:
 405                /* TX FIFO low (3 bytes or less) */
 406                space = 13;
 407                break;
 408        case WBCIR_TXSTATE_ERROR:
 409                space = 0;
 410                break;
 411        default:
 412                return;
 413        }
 414
 415        /*
 416         * TX data is run-length coded in bytes: YXXXXXXX
 417         * Y = space (1) or pulse (0)
 418         * X = duration, encoded as (X + 1) * 10us (i.e 10 to 1280 us)
 419         */
 420        for (used = 0; used < space && data->txoff != data->txlen; used++) {
 421                if (data->txbuf[data->txoff] == 0) {
 422                        data->txoff++;
 423                        continue;
 424                }
 425                byte = min((u32)0x80, data->txbuf[data->txoff]);
 426                data->txbuf[data->txoff] -= byte;
 427                byte--;
 428                byte |= (data->txoff % 2 ? 0x80 : 0x00); /* pulse/space */
 429                bytes[used] = byte;
 430        }
 431
 432        while (data->txoff != data->txlen && data->txbuf[data->txoff] == 0)
 433                data->txoff++;
 434
 435        if (used == 0) {
 436                /* Finished */
 437                if (data->txstate == WBCIR_TXSTATE_ERROR)
 438                        /* Clear TX underrun bit */
 439                        outb(WBCIR_TX_UNDERRUN, data->sbase + WBCIR_REG_SP3_ASCR);
 440                wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR);
 441                kfree(data->txbuf);
 442                data->txbuf = NULL;
 443                data->txstate = WBCIR_TXSTATE_INACTIVE;
 444        } else if (data->txoff == data->txlen) {
 445                /* At the end of transmission, tell the hw before last byte */
 446                outsb(data->sbase + WBCIR_REG_SP3_TXDATA, bytes, used - 1);
 447                outb(WBCIR_TX_EOT, data->sbase + WBCIR_REG_SP3_ASCR);
 448                outb(bytes[used - 1], data->sbase + WBCIR_REG_SP3_TXDATA);
 449                wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR |
 450                                  WBCIR_IRQ_TX_EMPTY);
 451        } else {
 452                /* More data to follow... */
 453                outsb(data->sbase + WBCIR_REG_SP3_RXDATA, bytes, used);
 454                if (data->txstate == WBCIR_TXSTATE_INACTIVE) {
 455                        wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR |
 456                                          WBCIR_IRQ_TX_LOW);
 457                        data->txstate = WBCIR_TXSTATE_ACTIVE;
 458                }
 459        }
 460}
 461
 462static irqreturn_t
 463wbcir_irq_handler(int irqno, void *cookie)
 464{
 465        struct pnp_dev *device = cookie;
 466        struct wbcir_data *data = pnp_get_drvdata(device);
 467        unsigned long flags;
 468        u8 status;
 469
 470        spin_lock_irqsave(&data->spinlock, flags);
 471        wbcir_select_bank(data, WBCIR_BANK_0);
 472        status = inb(data->sbase + WBCIR_REG_SP3_EIR);
 473        status &= data->irqmask;
 474
 475        if (!status) {
 476                spin_unlock_irqrestore(&data->spinlock, flags);
 477                return IRQ_NONE;
 478        }
 479
 480        if (status & WBCIR_IRQ_ERR) {
 481                /* RX overflow? (read clears bit) */
 482                if (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_OVERRUN) {
 483                        data->rxstate = WBCIR_RXSTATE_ERROR;
 484                        ir_raw_event_reset(data->dev);
 485                }
 486
 487                /* TX underflow? */
 488                if (inb(data->sbase + WBCIR_REG_SP3_ASCR) & WBCIR_TX_UNDERRUN)
 489                        data->txstate = WBCIR_TXSTATE_ERROR;
 490        }
 491
 492        if (status & WBCIR_IRQ_RX)
 493                wbcir_irq_rx(data, device);
 494
 495        if (status & (WBCIR_IRQ_TX_LOW | WBCIR_IRQ_TX_EMPTY))
 496                wbcir_irq_tx(data);
 497
 498        spin_unlock_irqrestore(&data->spinlock, flags);
 499        return IRQ_HANDLED;
 500}
 501
 502/*****************************************************************************
 503 *
 504 * RC-CORE INTERFACE FUNCTIONS
 505 *
 506 *****************************************************************************/
 507
 508static int
 509wbcir_set_carrier_report(struct rc_dev *dev, int enable)
 510{
 511        struct wbcir_data *data = dev->priv;
 512        unsigned long flags;
 513
 514        spin_lock_irqsave(&data->spinlock, flags);
 515
 516        if (data->carrier_report_enabled == enable) {
 517                spin_unlock_irqrestore(&data->spinlock, flags);
 518                return 0;
 519        }
 520
 521        data->pulse_duration = 0;
 522        wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
 523                                                WBCIR_CNTR_EN | WBCIR_CNTR_R);
 524
 525        if (enable && data->dev->idle)
 526                wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL,
 527                                WBCIR_CNTR_EN, WBCIR_CNTR_EN | WBCIR_CNTR_R);
 528
 529        /* Set a higher sampling resolution if carrier reports are enabled */
 530        wbcir_select_bank(data, WBCIR_BANK_2);
 531        data->dev->rx_resolution = US_TO_NS(enable ? 2 : 10);
 532        outb(enable ? 0x03 : 0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
 533        outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
 534
 535        /* Enable oversampling if carrier reports are enabled */
 536        wbcir_select_bank(data, WBCIR_BANK_7);
 537        wbcir_set_bits(data->sbase + WBCIR_REG_SP3_RCCFG,
 538                                enable ? WBCIR_RX_T_OV : 0, WBCIR_RX_T_OV);
 539
 540        data->carrier_report_enabled = enable;
 541        spin_unlock_irqrestore(&data->spinlock, flags);
 542
 543        return 0;
 544}
 545
 546static int
 547wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
 548{
 549        struct wbcir_data *data = dev->priv;
 550        unsigned long flags;
 551        u8 val;
 552        u32 freq;
 553
 554        freq = DIV_ROUND_CLOSEST(carrier, 1000);
 555        if (freq < 30 || freq > 60)
 556                return -EINVAL;
 557
 558        switch (freq) {
 559        case 58:
 560        case 59:
 561        case 60:
 562                val = freq - 58;
 563                freq *= 1000;
 564                break;
 565        case 57:
 566                val = freq - 27;
 567                freq = 56900;
 568                break;
 569        default:
 570                val = freq - 27;
 571                freq *= 1000;
 572                break;
 573        }
 574
 575        spin_lock_irqsave(&data->spinlock, flags);
 576        if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
 577                spin_unlock_irqrestore(&data->spinlock, flags);
 578                return -EBUSY;
 579        }
 580
 581        if (data->txcarrier != freq) {
 582                wbcir_select_bank(data, WBCIR_BANK_7);
 583                wbcir_set_bits(data->sbase + WBCIR_REG_SP3_IRTXMC, val, 0x1F);
 584                data->txcarrier = freq;
 585        }
 586
 587        spin_unlock_irqrestore(&data->spinlock, flags);
 588        return 0;
 589}
 590
 591static int
 592wbcir_txmask(struct rc_dev *dev, u32 mask)
 593{
 594        struct wbcir_data *data = dev->priv;
 595        unsigned long flags;
 596        u8 val;
 597
 598        /* return the number of transmitters */
 599        if (mask > 15)
 600                return 4;
 601
 602        /* Four outputs, only one output can be enabled at a time */
 603        switch (mask) {
 604        case 0x1:
 605                val = 0x0;
 606                break;
 607        case 0x2:
 608                val = 0x1;
 609                break;
 610        case 0x4:
 611                val = 0x2;
 612                break;
 613        case 0x8:
 614                val = 0x3;
 615                break;
 616        default:
 617                return -EINVAL;
 618        }
 619
 620        spin_lock_irqsave(&data->spinlock, flags);
 621        if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
 622                spin_unlock_irqrestore(&data->spinlock, flags);
 623                return -EBUSY;
 624        }
 625
 626        if (data->txmask != mask) {
 627                wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS, val, 0x0c);
 628                data->txmask = mask;
 629        }
 630
 631        spin_unlock_irqrestore(&data->spinlock, flags);
 632        return 0;
 633}
 634
 635static int
 636wbcir_tx(struct rc_dev *dev, unsigned *b, unsigned count)
 637{
 638        struct wbcir_data *data = dev->priv;
 639        unsigned *buf;
 640        unsigned i;
 641        unsigned long flags;
 642
 643        buf = kmalloc_array(count, sizeof(*b), GFP_KERNEL);
 644        if (!buf)
 645                return -ENOMEM;
 646
 647        /* Convert values to multiples of 10us */
 648        for (i = 0; i < count; i++)
 649                buf[i] = DIV_ROUND_CLOSEST(b[i], 10);
 650
 651        /* Not sure if this is possible, but better safe than sorry */
 652        spin_lock_irqsave(&data->spinlock, flags);
 653        if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
 654                spin_unlock_irqrestore(&data->spinlock, flags);
 655                kfree(buf);
 656                return -EBUSY;
 657        }
 658
 659        /* Fill the TX fifo once, the irq handler will do the rest */
 660        data->txbuf = buf;
 661        data->txlen = count;
 662        data->txoff = 0;
 663        wbcir_irq_tx(data);
 664
 665        /* We're done */
 666        spin_unlock_irqrestore(&data->spinlock, flags);
 667        return count;
 668}
 669
 670/*****************************************************************************
 671 *
 672 * SETUP/INIT/SUSPEND/RESUME FUNCTIONS
 673 *
 674 *****************************************************************************/
 675
 676static void
 677wbcir_shutdown(struct pnp_dev *device)
 678{
 679        struct device *dev = &device->dev;
 680        struct wbcir_data *data = pnp_get_drvdata(device);
 681        struct rc_dev *rc = data->dev;
 682        bool do_wake = true;
 683        u8 match[11];
 684        u8 mask[11];
 685        u8 rc6_csl = 0;
 686        u8 proto;
 687        u32 wake_sc = rc->scancode_wakeup_filter.data;
 688        u32 mask_sc = rc->scancode_wakeup_filter.mask;
 689        int i;
 690
 691        memset(match, 0, sizeof(match));
 692        memset(mask, 0, sizeof(mask));
 693
 694        if (!mask_sc || !device_may_wakeup(dev)) {
 695                do_wake = false;
 696                goto finish;
 697        }
 698
 699        switch (rc->wakeup_protocol) {
 700        case RC_PROTO_RC5:
 701                /* Mask = 13 bits, ex toggle */
 702                mask[0]  = (mask_sc & 0x003f);
 703                mask[0] |= (mask_sc & 0x0300) >> 2;
 704                mask[1]  = (mask_sc & 0x1c00) >> 10;
 705                if (mask_sc & 0x0040)                 /* 2nd start bit  */
 706                        match[1] |= 0x10;
 707
 708                match[0]  = (wake_sc & 0x003F);       /* 6 command bits */
 709                match[0] |= (wake_sc & 0x0300) >> 2;  /* 2 address bits */
 710                match[1]  = (wake_sc & 0x1c00) >> 10; /* 3 address bits */
 711                if (!(wake_sc & 0x0040))              /* 2nd start bit  */
 712                        match[1] |= 0x10;
 713
 714                proto = IR_PROTOCOL_RC5;
 715                break;
 716
 717        case RC_PROTO_NEC:
 718                mask[1] = bitrev8(mask_sc);
 719                mask[0] = mask[1];
 720                mask[3] = bitrev8(mask_sc >> 8);
 721                mask[2] = mask[3];
 722
 723                match[1] = bitrev8(wake_sc);
 724                match[0] = ~match[1];
 725                match[3] = bitrev8(wake_sc >> 8);
 726                match[2] = ~match[3];
 727
 728                proto = IR_PROTOCOL_NEC;
 729                break;
 730
 731        case RC_PROTO_NECX:
 732                mask[1] = bitrev8(mask_sc);
 733                mask[0] = mask[1];
 734                mask[2] = bitrev8(mask_sc >> 8);
 735                mask[3] = bitrev8(mask_sc >> 16);
 736
 737                match[1] = bitrev8(wake_sc);
 738                match[0] = ~match[1];
 739                match[2] = bitrev8(wake_sc >> 8);
 740                match[3] = bitrev8(wake_sc >> 16);
 741
 742                proto = IR_PROTOCOL_NEC;
 743                break;
 744
 745        case RC_PROTO_NEC32:
 746                mask[0] = bitrev8(mask_sc);
 747                mask[1] = bitrev8(mask_sc >> 8);
 748                mask[2] = bitrev8(mask_sc >> 16);
 749                mask[3] = bitrev8(mask_sc >> 24);
 750
 751                match[0] = bitrev8(wake_sc);
 752                match[1] = bitrev8(wake_sc >> 8);
 753                match[2] = bitrev8(wake_sc >> 16);
 754                match[3] = bitrev8(wake_sc >> 24);
 755
 756                proto = IR_PROTOCOL_NEC;
 757                break;
 758
 759        case RC_PROTO_RC6_0:
 760                /* Command */
 761                match[0] = wbcir_to_rc6cells(wake_sc >> 0);
 762                mask[0]  = wbcir_to_rc6cells(mask_sc >> 0);
 763                match[1] = wbcir_to_rc6cells(wake_sc >> 4);
 764                mask[1]  = wbcir_to_rc6cells(mask_sc >> 4);
 765
 766                /* Address */
 767                match[2] = wbcir_to_rc6cells(wake_sc >>  8);
 768                mask[2]  = wbcir_to_rc6cells(mask_sc >>  8);
 769                match[3] = wbcir_to_rc6cells(wake_sc >> 12);
 770                mask[3]  = wbcir_to_rc6cells(mask_sc >> 12);
 771
 772                /* Header */
 773                match[4] = 0x50; /* mode1 = mode0 = 0, ignore toggle */
 774                mask[4]  = 0xF0;
 775                match[5] = 0x09; /* start bit = 1, mode2 = 0 */
 776                mask[5]  = 0x0F;
 777
 778                rc6_csl = 44;
 779                proto = IR_PROTOCOL_RC6;
 780                break;
 781
 782        case RC_PROTO_RC6_6A_24:
 783        case RC_PROTO_RC6_6A_32:
 784        case RC_PROTO_RC6_MCE:
 785                i = 0;
 786
 787                /* Command */
 788                match[i]  = wbcir_to_rc6cells(wake_sc >>  0);
 789                mask[i++] = wbcir_to_rc6cells(mask_sc >>  0);
 790                match[i]  = wbcir_to_rc6cells(wake_sc >>  4);
 791                mask[i++] = wbcir_to_rc6cells(mask_sc >>  4);
 792
 793                /* Address + Toggle */
 794                match[i]  = wbcir_to_rc6cells(wake_sc >>  8);
 795                mask[i++] = wbcir_to_rc6cells(mask_sc >>  8);
 796                match[i]  = wbcir_to_rc6cells(wake_sc >> 12);
 797                mask[i++] = wbcir_to_rc6cells(mask_sc >> 12);
 798
 799                /* Customer bits 7 - 0 */
 800                match[i]  = wbcir_to_rc6cells(wake_sc >> 16);
 801                mask[i++] = wbcir_to_rc6cells(mask_sc >> 16);
 802
 803                if (rc->wakeup_protocol == RC_PROTO_RC6_6A_20) {
 804                        rc6_csl = 52;
 805                } else {
 806                        match[i]  = wbcir_to_rc6cells(wake_sc >> 20);
 807                        mask[i++] = wbcir_to_rc6cells(mask_sc >> 20);
 808
 809                        if (rc->wakeup_protocol == RC_PROTO_RC6_6A_24) {
 810                                rc6_csl = 60;
 811                        } else {
 812                                /* Customer range bit and bits 15 - 8 */
 813                                match[i]  = wbcir_to_rc6cells(wake_sc >> 24);
 814                                mask[i++] = wbcir_to_rc6cells(mask_sc >> 24);
 815                                match[i]  = wbcir_to_rc6cells(wake_sc >> 28);
 816                                mask[i++] = wbcir_to_rc6cells(mask_sc >> 28);
 817                                rc6_csl = 76;
 818                        }
 819                }
 820
 821                /* Header */
 822                match[i]  = 0x93; /* mode1 = mode0 = 1, submode = 0 */
 823                mask[i++] = 0xFF;
 824                match[i]  = 0x0A; /* start bit = 1, mode2 = 1 */
 825                mask[i++] = 0x0F;
 826                proto = IR_PROTOCOL_RC6;
 827                break;
 828        default:
 829                do_wake = false;
 830                break;
 831        }
 832
 833finish:
 834        if (do_wake) {
 835                /* Set compare and compare mask */
 836                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
 837                               WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
 838                               0x3F);
 839                outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
 840                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
 841                               WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
 842                               0x3F);
 843                outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
 844
 845                /* RC6 Compare String Len */
 846                outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
 847
 848                /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
 849                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
 850
 851                /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
 852                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
 853
 854                /* Set CEIR_EN */
 855                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL,
 856                               (proto << 4) | 0x01, 0x31);
 857
 858        } else {
 859                /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
 860                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
 861
 862                /* Clear CEIR_EN */
 863                wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
 864        }
 865
 866        /*
 867         * ACPI will set the HW disable bit for SP3 which means that the
 868         * output signals are left in an undefined state which may cause
 869         * spurious interrupts which we need to ignore until the hardware
 870         * is reinitialized.
 871         */
 872        wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
 873        disable_irq(data->irq);
 874}
 875
 876/*
 877 * Wakeup handling is done on shutdown.
 878 */
 879static int
 880wbcir_set_wakeup_filter(struct rc_dev *rc, struct rc_scancode_filter *filter)
 881{
 882        return 0;
 883}
 884
 885static int
 886wbcir_suspend(struct pnp_dev *device, pm_message_t state)
 887{
 888        struct wbcir_data *data = pnp_get_drvdata(device);
 889        led_classdev_suspend(&data->led);
 890        wbcir_shutdown(device);
 891        return 0;
 892}
 893
 894static void
 895wbcir_init_hw(struct wbcir_data *data)
 896{
 897        /* Disable interrupts */
 898        wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
 899
 900        /* Set RX_INV, Clear CEIR_EN (needed for the led) */
 901        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, invert ? 8 : 0, 0x09);
 902
 903        /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
 904        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
 905
 906        /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
 907        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
 908
 909        /* Set RC5 cell time to correspond to 36 kHz */
 910        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CFG1, 0x4A, 0x7F);
 911
 912        /* Set IRTX_INV */
 913        if (invert)
 914                outb(WBCIR_IRTX_INV, data->ebase + WBCIR_REG_ECEIR_CCTL);
 915        else
 916                outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);
 917
 918        /*
 919         * Clear IR LED, set SP3 clock to 24Mhz, set TX mask to IRTX1,
 920         * set SP3_IRRX_SW to binary 01, helpfully not documented
 921         */
 922        outb(0x10, data->ebase + WBCIR_REG_ECEIR_CTS);
 923        data->txmask = 0x1;
 924
 925        /* Enable extended mode */
 926        wbcir_select_bank(data, WBCIR_BANK_2);
 927        outb(WBCIR_EXT_ENABLE, data->sbase + WBCIR_REG_SP3_EXCR1);
 928
 929        /*
 930         * Configure baud generator, IR data will be sampled at
 931         * a bitrate of: (24Mhz * prescaler) / (divisor * 16).
 932         *
 933         * The ECIR registers include a flag to change the
 934         * 24Mhz clock freq to 48Mhz.
 935         *
 936         * It's not documented in the specs, but fifo levels
 937         * other than 16 seems to be unsupported.
 938         */
 939
 940        /* prescaler 1.0, tx/rx fifo lvl 16 */
 941        outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);
 942
 943        /* Set baud divisor to sample every 10 us */
 944        outb(0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
 945        outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
 946
 947        /* Set CEIR mode */
 948        wbcir_select_bank(data, WBCIR_BANK_0);
 949        outb(0xC0, data->sbase + WBCIR_REG_SP3_MCR);
 950        inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */
 951        inb(data->sbase + WBCIR_REG_SP3_MSR); /* Clear MSR */
 952
 953        /* Disable RX demod, enable run-length enc/dec, set freq span */
 954        wbcir_select_bank(data, WBCIR_BANK_7);
 955        outb(0x90, data->sbase + WBCIR_REG_SP3_RCCFG);
 956
 957        /* Disable timer */
 958        wbcir_select_bank(data, WBCIR_BANK_4);
 959        outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR1);
 960
 961        /* Disable MSR interrupt, clear AUX_IRX, mask RX during TX? */
 962        wbcir_select_bank(data, WBCIR_BANK_5);
 963        outb(txandrx ? 0x03 : 0x02, data->sbase + WBCIR_REG_SP3_IRCR2);
 964
 965        /* Disable CRC */
 966        wbcir_select_bank(data, WBCIR_BANK_6);
 967        outb(0x20, data->sbase + WBCIR_REG_SP3_IRCR3);
 968
 969        /* Set RX demodulation freq, not really used */
 970        wbcir_select_bank(data, WBCIR_BANK_7);
 971        outb(0xF2, data->sbase + WBCIR_REG_SP3_IRRXDC);
 972
 973        /* Set TX modulation, 36kHz, 7us pulse width */
 974        outb(0x69, data->sbase + WBCIR_REG_SP3_IRTXMC);
 975        data->txcarrier = 36000;
 976
 977        /* Set invert and pin direction */
 978        if (invert)
 979                outb(0x10, data->sbase + WBCIR_REG_SP3_IRCFG4);
 980        else
 981                outb(0x00, data->sbase + WBCIR_REG_SP3_IRCFG4);
 982
 983        /* Set FIFO thresholds (RX = 8, TX = 3), reset RX/TX */
 984        wbcir_select_bank(data, WBCIR_BANK_0);
 985        outb(0x97, data->sbase + WBCIR_REG_SP3_FCR);
 986
 987        /* Clear AUX status bits */
 988        outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);
 989
 990        /* Clear RX state */
 991        data->rxstate = WBCIR_RXSTATE_INACTIVE;
 992        ir_raw_event_reset(data->dev);
 993        ir_raw_event_set_idle(data->dev, true);
 994
 995        /* Clear TX state */
 996        if (data->txstate == WBCIR_TXSTATE_ACTIVE) {
 997                kfree(data->txbuf);
 998                data->txbuf = NULL;
 999                data->txstate = WBCIR_TXSTATE_INACTIVE;
1000        }

1001
1002        /* Enable interrupts */
1003        wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR);
1004}
1005
1006static int
1007wbcir_resume(struct pnp_dev *device)
1008{
1009        struct wbcir_data *data = pnp_get_drvdata(device);
1010
1011        wbcir_init_hw(data);
1012        enable_irq(data->irq);
1013        led_classdev_resume(&data->led);
1014
1015        return 0;
1016}
1017
1018static int
1019wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
1020{
1021        struct device *dev = &device->dev;
1022        struct wbcir_data *data;
1023        int err;
1024
1025        if (!(pnp_port_len(device, 0) == EHFUNC_IOMEM_LEN &&
1026              pnp_port_len(device, 1) == WAKEUP_IOMEM_LEN &&
1027              pnp_port_len(device, 2) == SP_IOMEM_LEN)) {
1028                dev_err(dev, "Invalid resources\n");
1029                return -ENODEV;
1030        }
1031
1032        data = kzalloc(sizeof(*data), GFP_KERNEL);
1033        if (!data) {
1034                err = -ENOMEM;
1035                goto exit;
1036        }
1037
1038        pnp_set_drvdata(device, data);
1039
1040        spin_lock_init(&data->spinlock);
1041        data->ebase = pnp_port_start(device, 0);
1042        data->wbase = pnp_port_start(device, 1);
1043        data->sbase = pnp_port_start(device, 2);
1044        data->irq = pnp_irq(device, 0);
1045
1046        if (data->wbase == 0 || data->ebase == 0 ||
1047            data->sbase == 0 || data->irq == -1) {
1048                err = -ENODEV;
1049                dev_err(dev, "Invalid resources\n");
1050                goto exit_free_data;
1051        }
1052
1053        dev_dbg(&device->dev, "Found device (w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
1054                data->wbase, data->ebase, data->sbase, data->irq);
1055
1056        data->led.name = "cir::activity";
1057        data->led.default_trigger = "rc-feedback";
1058        data->led.brightness_set = wbcir_led_brightness_set;
1059        data->led.brightness_get = wbcir_led_brightness_get;
1060        err = led_classdev_register(&device->dev, &data->led);
1061        if (err)
1062                goto exit_free_data;
1063
1064        data->dev = rc_allocate_device(RC_DRIVER_IR_RAW);
1065        if (!data->dev) {
1066                err = -ENOMEM;
1067                goto exit_unregister_led;
1068        }
1069
1070        data->dev->driver_name = DRVNAME;
1071        data->dev->device_name = WBCIR_NAME;
1072        data->dev->input_phys = "wbcir/cir0";
1073        data->dev->input_id.bustype = BUS_HOST;
1074        data->dev->input_id.vendor = PCI_VENDOR_ID_WINBOND;
1075        data->dev->input_id.product = WBCIR_ID_FAMILY;
1076        data->dev->input_id.version = WBCIR_ID_CHIP;
1077        data->dev->map_name = RC_MAP_RC6_MCE;
1078        data->dev->s_idle = wbcir_idle_rx;
1079        data->dev->s_carrier_report = wbcir_set_carrier_report;
1080        data->dev->s_tx_mask = wbcir_txmask;
1081        data->dev->s_tx_carrier = wbcir_txcarrier;
1082        data->dev->tx_ir = wbcir_tx;
1083        data->dev->priv = data;
1084        data->dev->dev.parent = &device->dev;
1085        data->dev->min_timeout = 1;
1086        data->dev->timeout = IR_DEFAULT_TIMEOUT;
1087        data->dev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
1088        data->dev->rx_resolution = US_TO_NS(2);
1089        data->dev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
1090        data->dev->allowed_wakeup_protocols = RC_PROTO_BIT_NEC |
1091                RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32 | RC_PROTO_BIT_RC5 |
1092                RC_PROTO_BIT_RC6_0 | RC_PROTO_BIT_RC6_6A_20 |
1093                RC_PROTO_BIT_RC6_6A_24 | RC_PROTO_BIT_RC6_6A_32 |
1094                RC_PROTO_BIT_RC6_MCE;
1095        data->dev->wakeup_protocol = RC_PROTO_RC6_MCE;
1096        data->dev->scancode_wakeup_filter.data = 0x800f040c;
1097        data->dev->scancode_wakeup_filter.mask = 0xffff7fff;
1098        data->dev->s_wakeup_filter = wbcir_set_wakeup_filter;
1099
1100        err = rc_register_device(data->dev);
1101        if (err)
1102                goto exit_free_rc;
1103
1104        if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
1105                dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1106                        data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
1107                err = -EBUSY;
1108                goto exit_unregister_device;
1109        }
1110
1111        if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
1112                dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1113                        data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
1114                err = -EBUSY;
1115                goto exit_release_wbase;
1116        }
1117
1118        if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
1119                dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1120                        data->sbase, data->sbase + SP_IOMEM_LEN - 1);
1121                err = -EBUSY;
1122                goto exit_release_ebase;
1123        }
1124
1125        err = request_irq(data->irq, wbcir_irq_handler,
1126                          0, DRVNAME, device);
1127        if (err) {
1128                dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
1129                err = -EBUSY;
1130                goto exit_release_sbase;
1131        }
1132
1133        device_init_wakeup(&device->dev, 1);
1134
1135        wbcir_init_hw(data);
1136
1137        return 0;
1138
1139exit_release_sbase:
1140        release_region(data->sbase, SP_IOMEM_LEN);
1141exit_release_ebase:
1142        release_region(data->ebase, EHFUNC_IOMEM_LEN);
1143exit_release_wbase:
1144        release_region(data->wbase, WAKEUP_IOMEM_LEN);
1145exit_unregister_device:
1146        rc_unregister_device(data->dev);
1147        data->dev = NULL;
1148exit_free_rc:
1149        rc_free_device(data->dev);
1150exit_unregister_led:
1151        led_classdev_unregister(&data->led);
1152exit_free_data:
1153        kfree(data);
1154        pnp_set_drvdata(device, NULL);
1155exit:
1156        return err;
1157}
1158
1159static void
1160wbcir_remove(struct pnp_dev *device)
1161{
1162        struct wbcir_data *data = pnp_get_drvdata(device);
1163
1164        /* Disable interrupts */
1165        wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
1166        free_irq(data->irq, device);
1167
1168        /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
1169        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
1170
1171        /* Clear CEIR_EN */
1172        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
1173
1174        /* Clear BUFF_EN, END_EN, MATCH_EN */
1175        wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
1176
1177        rc_unregister_device(data->dev);
1178
1179        led_classdev_unregister(&data->led);
1180
1181        /* This is ok since &data->led isn't actually used */
1182        wbcir_led_brightness_set(&data->led, LED_OFF);
1183
1184        release_region(data->wbase, WAKEUP_IOMEM_LEN);
1185        release_region(data->ebase, EHFUNC_IOMEM_LEN);
1186        release_region(data->sbase, SP_IOMEM_LEN);
1187
1188        kfree(data);
1189
1190        pnp_set_drvdata(device, NULL);
1191}
1192
1193static const struct pnp_device_id wbcir_ids[] = {
1194        { "WEC1022", 0 },
1195        { "", 0 }
1196};
1197MODULE_DEVICE_TABLE(pnp, wbcir_ids);
1198
1199static struct pnp_driver wbcir_driver = {
1200        .name     = DRVNAME,
1201        .id_table = wbcir_ids,
1202        .probe    = wbcir_probe,
1203        .remove   = wbcir_remove,
1204        .suspend  = wbcir_suspend,
1205        .resume   = wbcir_resume,
1206        .shutdown = wbcir_shutdown
1207};
1208
1209static int __init
1210wbcir_init(void)
1211{
1212        int ret;
1213
1214        ret = pnp_register_driver(&wbcir_driver);
1215        if (ret)
1216                pr_err("Unable to register driver\n");
1217
1218        return ret;
1219}
1220
1221static void __exit
1222wbcir_exit(void)
1223{
1224        pnp_unregister_driver(&wbcir_driver);
1225}
1226
1227module_init(wbcir_init);
1228module_exit(wbcir_exit);
1229
1230MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
1231MODULE_DESCRIPTION("Winbond SuperI/O Consumer IR Driver");
1232MODULE_LICENSE("GPL");
1233