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   1 /*********************************************************************
   2  *
   3  * Filename:      w83977af_ir.c
   4  * Version:       1.0
   5  * Description:   FIR driver for the Winbond W83977AF Super I/O chip
   6  * Status:        Experimental.
   7  * Author:        Paul VanderSpek
   8  * Created at:    Wed Nov  4 11:46:16 1998
   9  * Modified at:   Fri Jan 28 12:10:59 2000
  10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11  *
  12  *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
  13  *     Copyright (c) 1998-1999 Rebel.com
  14  *
  15  *     This program is free software; you can redistribute it and/or
  16  *     modify it under the terms of the GNU General Public License as
  17  *     published by the Free Software Foundation; either version 2 of
  18  *     the License, or (at your option) any later version.
  19  *
  20  *     Neither Paul VanderSpek nor Rebel.com admit liability nor provide
  21  *     warranty for any of this software. This material is provided "AS-IS"
  22  *     and at no charge.
  23  *
  24  *     If you find bugs in this file, its very likely that the same bug
  25  *     will also be in pc87108.c since the implementations are quite
  26  *     similar.
  27  *
  28  *     Notice that all functions that needs to access the chip in _any_
  29  *     way, must save BSR register on entry, and restore it on exit.
  30  *     It is _very_ important to follow this policy!
  31  *
  32  *         __u8 bank;
  33  *
  34  *         bank = inb( iobase+BSR);
  35  *
  36  *         do_your_stuff_here();
  37  *
  38  *         outb( bank, iobase+BSR);
  39  *
  40  ********************************************************************/
  41
  42 #include <linux/module.h>
  43 #include <linux/kernel.h>
  44 #include <linux/types.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/ioport.h>
  48 #include <linux/delay.h>
  49 #include <linux/slab.h>
  50 #include <linux/init.h>
  51 #include <linux/rtnetlink.h>
  52 #include <linux/dma-mapping.h>
  53
  54 #include <asm/io.h>
  55 #include <asm/dma.h>
  56 #include <asm/byteorder.h>
  57
  58 #include <net/irda/irda.h>
  59 #include <net/irda/wrapper.h>
  60 #include <net/irda/irda_device.h>
  61 #include "w83977af.h"
  62 #include "w83977af_ir.h"
  63
  64 #ifdef  CONFIG_ARCH_NETWINDER            /* Adjust to NetWinder differences */
  65 #undef  CONFIG_NETWINDER_TX_DMA_PROBLEMS /* Not needed */
  66 #define CONFIG_NETWINDER_RX_DMA_PROBLEMS /* Must have this one! */
  67 #endif
  68 #undef  CONFIG_USE_INTERNAL_TIMER  /* Just cannot make that timer work */
  69 #define CONFIG_USE_W977_PNP        /* Currently needed */
  70 #define PIO_MAX_SPEED       115200
  71
  72 static char *driver_name = "w83977af_ir";
  73 static int  qos_mtt_bits = 0x07;   /* 1 ms or more */
  74
  75 #define CHIP_IO_EXTENT 8
  76
  77 static unsigned int io[] = { 0x180, ~0, ~0, ~0 };
  78 #ifdef CONFIG_ARCH_NETWINDER             /* Adjust to NetWinder differences */
  79 static unsigned int irq[] = { 6, 0, 0, 0 };
  80 #else
  81 static unsigned int irq[] = { 11, 0, 0, 0 };
  82 #endif
  83 static unsigned int dma[] = { 1, 0, 0, 0 };
  84 static unsigned int efbase[] = { W977_EFIO_BASE, W977_EFIO2_BASE };
  85 static unsigned int efio = W977_EFIO_BASE;
  86
  87 static struct w83977af_ir *dev_self[] = { NULL, NULL, NULL, NULL};
  88
  89 /* Some prototypes */
  90 static int  w83977af_open(int i, unsigned int iobase, unsigned int irq,
  91                           unsigned int dma);
  92 static int  w83977af_close(struct w83977af_ir *self);
  93 static int  w83977af_probe(int iobase, int irq, int dma);
  94 static int  w83977af_dma_receive(struct w83977af_ir *self);
  95 static int  w83977af_dma_receive_complete(struct w83977af_ir *self);
  96 static int  w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev);
  97 static int  w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
  98 static void w83977af_dma_write(struct w83977af_ir *self, int iobase);
  99 static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed);
 100 static int  w83977af_is_receiving(struct w83977af_ir *self);
 101
 102 static int  w83977af_net_open(struct net_device *dev);
 103 static int  w83977af_net_close(struct net_device *dev);
 104 static int  w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 105
 106 /*
 107  * Function w83977af_init ()
 108  *
 109  *    Initialize chip. Just try to find out how many chips we are dealing with
 110  *    and where they are
 111  */
 112 static int __init w83977af_init(void)
 113 {
 114         int i;
 115
 116         IRDA_DEBUG(0, "%s()\n", __func__ );
 117
 118         for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) {
 119                 if (w83977af_open(i, io[i], irq[i], dma[i]) == 0)
 120                         return 0;
 121         }
 122         return -ENODEV;
 123 }
 124
 125 /*
 126  * Function w83977af_cleanup ()
 127  *
 128  *    Close all configured chips
 129  *
 130  */
 131 static void __exit w83977af_cleanup(void)
 132 {
 133         int i;
 134
 135         IRDA_DEBUG(4, "%s()\n", __func__ );
 136
 137         for (i=0; i < ARRAY_SIZE(dev_self); i++) {
 138                 if (dev_self[i])
 139                         w83977af_close(dev_self[i]);
 140         }
 141 }
 142
 143 static const struct net_device_ops w83977_netdev_ops = {
 144         .ndo_open       = w83977af_net_open,
 145         .ndo_stop       = w83977af_net_close,
 146         .ndo_start_xmit = w83977af_hard_xmit,
 147         .ndo_do_ioctl   = w83977af_net_ioctl,
 148 };
 149
 150 /*
 151  * Function w83977af_open (iobase, irq)
 152  *
 153  *    Open driver instance
 154  *
 155  */
 156 static int w83977af_open(int i, unsigned int iobase, unsigned int irq,
 157                          unsigned int dma)
 158 {
 159         struct net_device *dev;
 160         struct w83977af_ir *self;
 161         int err;
 162
 163         IRDA_DEBUG(0, "%s()\n", __func__ );
 164
 165         /* Lock the port that we need */
 166         if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
 167                 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
 168                       __func__ , iobase);
 169                 return -ENODEV;
 170         }
 171
 172         if (w83977af_probe(iobase, irq, dma) == -1) {
 173                 err = -1;
 174                 goto err_out;
 175         }
 176         /*
 177          *  Allocate new instance of the driver
 178          */
 179         dev = alloc_irdadev(sizeof(struct w83977af_ir));
 180         if (dev == NULL) {
 181                 printk( KERN_ERR "IrDA: Can't allocate memory for "
 182                         "IrDA control block!\n");
 183                 err = -ENOMEM;
 184                 goto err_out;
 185         }
 186
 187         self = netdev_priv(dev);
 188         spin_lock_init(&self->lock);
 189
 190
 191         /* Initialize IO */
 192         self->io.fir_base   = iobase;
 193         self->io.irq       = irq;
 194         self->io.fir_ext   = CHIP_IO_EXTENT;
 195         self->io.dma       = dma;
 196         self->io.fifo_size = 32;
 197
 198         /* Initialize QoS for this device */
 199         irda_init_max_qos_capabilies(&self->qos);
 200
 201         /* The only value we must override it the baudrate */
 202
 203         /* FIXME: The HP HDLS-1100 does not support 1152000! */
 204         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 205                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
 206
 207         /* The HP HDLS-1100 needs 1 ms according to the specs */
 208         self->qos.min_turn_time.bits = qos_mtt_bits;
 209         irda_qos_bits_to_value(&self->qos);
 210
 211         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 212         self->rx_buff.truesize = 14384;
 213         self->tx_buff.truesize = 4000;
 214
 215         /* Allocate memory if needed */
 216         self->rx_buff.head =
 217                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 218                                    &self->rx_buff_dma, GFP_KERNEL);
 219         if (self->rx_buff.head == NULL) {
 220                 err = -ENOMEM;
 221                 goto err_out1;
 222         }
 223
 224         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 225
 226         self->tx_buff.head =
 227                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 228                                    &self->tx_buff_dma, GFP_KERNEL);
 229         if (self->tx_buff.head == NULL) {
 230                 err = -ENOMEM;
 231                 goto err_out2;
 232         }
 233         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 234
 235         self->rx_buff.in_frame = FALSE;
 236         self->rx_buff.state = OUTSIDE_FRAME;
 237         self->tx_buff.data = self->tx_buff.head;
 238         self->rx_buff.data = self->rx_buff.head;
 239         self->netdev = dev;
 240
 241         dev->netdev_ops = &w83977_netdev_ops;
 242
 243         err = register_netdev(dev);
 244         if (err) {
 245                 IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__);
 246                 goto err_out3;
 247         }
 248         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 249
 250         /* Need to store self somewhere */
 251         dev_self[i] = self;
 252
 253         return 0;
 254 err_out3:
 255         dma_free_coherent(NULL, self->tx_buff.truesize,
 256                           self->tx_buff.head, self->tx_buff_dma);
 257 err_out2:
 258         dma_free_coherent(NULL, self->rx_buff.truesize,
 259                           self->rx_buff.head, self->rx_buff_dma);
 260 err_out1:
 261         free_netdev(dev);
 262 err_out:
 263         release_region(iobase, CHIP_IO_EXTENT);
 264         return err;
 265 }
 266
 267 /*
 268  * Function w83977af_close (self)
 269  *
 270  *    Close driver instance
 271  *
 272  */
 273 static int w83977af_close(struct w83977af_ir *self)
 274 {
 275         int iobase;
 276
 277         IRDA_DEBUG(0, "%s()\n", __func__ );
 278
 279         iobase = self->io.fir_base;
 280
 281 #ifdef CONFIG_USE_W977_PNP
 282         /* enter PnP configuration mode */
 283         w977_efm_enter(efio);
 284
 285         w977_select_device(W977_DEVICE_IR, efio);
 286
 287         /* Deactivate device */
 288         w977_write_reg(0x30, 0x00, efio);
 289
 290         w977_efm_exit(efio);
 291 #endif /* CONFIG_USE_W977_PNP */
 292
 293         /* Remove netdevice */
 294         unregister_netdev(self->netdev);
 295
 296         /* Release the PORT that this driver is using */
 297         IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n",
 298               __func__ , self->io.fir_base);
 299         release_region(self->io.fir_base, self->io.fir_ext);
 300
 301         if (self->tx_buff.head)
 302                 dma_free_coherent(NULL, self->tx_buff.truesize,
 303                                   self->tx_buff.head, self->tx_buff_dma);
 304
 305         if (self->rx_buff.head)
 306                 dma_free_coherent(NULL, self->rx_buff.truesize,
 307                                   self->rx_buff.head, self->rx_buff_dma);
 308
 309         free_netdev(self->netdev);
 310
 311         return 0;
 312 }
 313
 314 static int w83977af_probe(int iobase, int irq, int dma)
 315 {
 316         int version;
 317         int i;
 318
 319         for (i=0; i < 2; i++) {
 320                 IRDA_DEBUG( 0, "%s()\n", __func__ );
 321 #ifdef CONFIG_USE_W977_PNP
 322                 /* Enter PnP configuration mode */
 323                 w977_efm_enter(efbase[i]);
 324
 325                 w977_select_device(W977_DEVICE_IR, efbase[i]);
 326
 327                 /* Configure PnP port, IRQ, and DMA channel */
 328                 w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]);
 329                 w977_write_reg(0x61, (iobase) & 0xff, efbase[i]);
 330
 331                 w977_write_reg(0x70, irq, efbase[i]);
 332 #ifdef CONFIG_ARCH_NETWINDER
 333                 /* Netwinder uses 1 higher than Linux */
 334                 w977_write_reg(0x74, dma+1, efbase[i]);
 335 #else
 336                 w977_write_reg(0x74, dma, efbase[i]);
 337 #endif /*CONFIG_ARCH_NETWINDER */
 338                 w977_write_reg(0x75, 0x04, efbase[i]);  /* Disable Tx DMA */
 339
 340                 /* Set append hardware CRC, enable IR bank selection */
 341                 w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]);
 342
 343                 /* Activate device */
 344                 w977_write_reg(0x30, 0x01, efbase[i]);
 345
 346                 w977_efm_exit(efbase[i]);
 347 #endif /* CONFIG_USE_W977_PNP */
 348                 /* Disable Advanced mode */
 349                 switch_bank(iobase, SET2);
 350                 outb(iobase+2, 0x00);
 351
 352                 /* Turn on UART (global) interrupts */
 353                 switch_bank(iobase, SET0);
 354                 outb(HCR_EN_IRQ, iobase+HCR);
 355
 356                 /* Switch to advanced mode */
 357                 switch_bank(iobase, SET2);
 358                 outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1);
 359
 360                 /* Set default IR-mode */
 361                 switch_bank(iobase, SET0);
 362                 outb(HCR_SIR, iobase+HCR);
 363
 364                 /* Read the Advanced IR ID */
 365                 switch_bank(iobase, SET3);
 366                 version = inb(iobase+AUID);
 367
 368                 /* Should be 0x1? */
 369                 if (0x10 == (version & 0xf0)) {
 370                         efio = efbase[i];
 371
 372                         /* Set FIFO size to 32 */
 373                         switch_bank(iobase, SET2);
 374                         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 375
 376                         /* Set FIFO threshold to TX17, RX16 */
 377                         switch_bank(iobase, SET0);
 378                         outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST|
 379                              UFR_EN_FIFO,iobase+UFR);
 380
 381                         /* Receiver frame length */
 382                         switch_bank(iobase, SET4);
 383                         outb(2048 & 0xff, iobase+6);
 384                         outb((2048 >> 8) & 0x1f, iobase+7);
 385
 386                         /*
 387                          * Init HP HSDL-1100 transceiver.
 388                          *
 389                          * Set IRX_MSL since we have 2 * receive paths IRRX,
 390                          * and IRRXH. Clear IRSL0D since we want IRSL0 * to
 391                          * be a input pin used for IRRXH
 392                          *
 393                          *   IRRX  pin 37 connected to receiver
 394                          *   IRTX  pin 38 connected to transmitter
 395                          *   FIRRX pin 39 connected to receiver      (IRSL0)
 396                          *   CIRRX pin 40 connected to pin 37
 397                          */
 398                         switch_bank(iobase, SET7);
 399                         outb(0x40, iobase+7);
 400
 401                         IRDA_MESSAGE("W83977AF (IR) driver loaded. "
 402                                      "Version: 0x%02x\n", version);
 403
 404                         return 0;
 405                 } else {
 406                         /* Try next extented function register address */
 407                         IRDA_DEBUG( 0, "%s(), Wrong chip version", __func__ );
 408                 }
 409         }
 410         return -1;
 411 }
 412
 413 static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed)
 414 {
 415         int ir_mode = HCR_SIR;
 416         int iobase;
 417         __u8 set;
 418
 419         iobase = self->io.fir_base;
 420
 421         /* Update accounting for new speed */
 422         self->io.speed = speed;
 423
 424         /* Save current bank */
 425         set = inb(iobase+SSR);
 426
 427         /* Disable interrupts */
 428         switch_bank(iobase, SET0);
 429         outb(0, iobase+ICR);
 430
 431         /* Select Set 2 */
 432         switch_bank(iobase, SET2);
 433         outb(0x00, iobase+ABHL);
 434
 435         switch (speed) {
 436         case 9600:   outb(0x0c, iobase+ABLL); break;
 437         case 19200:  outb(0x06, iobase+ABLL); break;
 438         case 38400:  outb(0x03, iobase+ABLL); break;
 439         case 57600:  outb(0x02, iobase+ABLL); break;
 440         case 115200: outb(0x01, iobase+ABLL); break;
 441         case 576000:
 442                 ir_mode = HCR_MIR_576;
 443                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__ );
 444                 break;
 445         case 1152000:
 446                 ir_mode = HCR_MIR_1152;
 447                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__ );
 448                 break;
 449         case 4000000:
 450                 ir_mode = HCR_FIR;
 451                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__ );
 452                 break;
 453         default:
 454                 ir_mode = HCR_FIR;
 455                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __func__ , speed);
 456                 break;
 457         }
 458
 459         /* Set speed mode */
 460         switch_bank(iobase, SET0);
 461         outb(ir_mode, iobase+HCR);
 462
 463         /* set FIFO size to 32 */
 464         switch_bank(iobase, SET2);
 465         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 466
 467         /* set FIFO threshold to TX17, RX16 */
 468         switch_bank(iobase, SET0);
 469         outb(0x00, iobase+UFR);        /* Reset */
 470         outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */
 471         outb(0xa7, iobase+UFR);
 472
 473         netif_wake_queue(self->netdev);
 474
 475         /* Enable some interrupts so we can receive frames */
 476         switch_bank(iobase, SET0);
 477         if (speed > PIO_MAX_SPEED) {
 478                 outb(ICR_EFSFI, iobase+ICR);
 479                 w83977af_dma_receive(self);
 480         } else
 481                 outb(ICR_ERBRI, iobase+ICR);
 482
 483         /* Restore SSR */
 484         outb(set, iobase+SSR);
 485 }
 486
 487 /*
 488  * Function w83977af_hard_xmit (skb, dev)
 489  *
 490  *    Sets up a DMA transfer to send the current frame.
 491  *
 492  */
 493 static int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 494 {
 495         struct w83977af_ir *self;
 496         __s32 speed;
 497         int iobase;
 498         __u8 set;
 499         int mtt;
 500
 501         self = netdev_priv(dev);
 502
 503         iobase = self->io.fir_base;
 504
 505         IRDA_DEBUG(4, "%s(%ld), skb->len=%d\n", __func__ , jiffies,
 506                    (int) skb->len);
 507
 508         /* Lock transmit buffer */
 509         netif_stop_queue(dev);
 510
 511         /* Check if we need to change the speed */
 512         speed = irda_get_next_speed(skb);
 513         if ((speed != self->io.speed) && (speed != -1)) {
 514                 /* Check for empty frame */
 515                 if (!skb->len) {
 516                         w83977af_change_speed(self, speed);
 517                         dev->trans_start = jiffies;
 518                         dev_kfree_skb(skb);
 519                         return 0;
 520                 } else
 521                         self->new_speed = speed;
 522         }
 523
 524         /* Save current set */
 525         set = inb(iobase+SSR);
 526
 527         /* Decide if we should use PIO or DMA transfer */
 528         if (self->io.speed > PIO_MAX_SPEED) {
 529                 self->tx_buff.data = self->tx_buff.head;
 530                 skb_copy_from_linear_data(skb, self->tx_buff.data, skb->len);
 531                 self->tx_buff.len = skb->len;
 532
 533                 mtt = irda_get_mtt(skb);
 534 #ifdef CONFIG_USE_INTERNAL_TIMER
 535                 if (mtt > 50) {
 536                         /* Adjust for timer resolution */
 537                         mtt /= 1000+1;
 538
 539                         /* Setup timer */
 540                         switch_bank(iobase, SET4);
 541                         outb(mtt & 0xff, iobase+TMRL);
 542                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
 543
 544                         /* Start timer */
 545                         outb(IR_MSL_EN_TMR, iobase+IR_MSL);
 546                         self->io.direction = IO_XMIT;
 547
 548                         /* Enable timer interrupt */
 549                         switch_bank(iobase, SET0);
 550                         outb(ICR_ETMRI, iobase+ICR);
 551                 } else {
 552 #endif
 553                         IRDA_DEBUG(4, "%s(%ld), mtt=%d\n", __func__ , jiffies, mtt);
 554                         if (mtt)
 555                                 udelay(mtt);
 556
 557                         /* Enable DMA interrupt */
 558                         switch_bank(iobase, SET0);
 559                         outb(ICR_EDMAI, iobase+ICR);
 560                         w83977af_dma_write(self, iobase);
 561 #ifdef CONFIG_USE_INTERNAL_TIMER
 562                 }
 563 #endif
 564         } else {
 565                 self->tx_buff.data = self->tx_buff.head;
 566                 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
 567                                                    self->tx_buff.truesize);
 568
 569                 /* Add interrupt on tx low level (will fire immediately) */
 570                 switch_bank(iobase, SET0);
 571                 outb(ICR_ETXTHI, iobase+ICR);
 572         }
 573         dev->trans_start = jiffies;
 574         dev_kfree_skb(skb);
 575
 576         /* Restore set register */
 577         outb(set, iobase+SSR);
 578
 579         return 0;
 580 }
 581
 582 /*
 583  * Function w83977af_dma_write (self, iobase)
 584  *
 585  *    Send frame using DMA
 586  *
 587  */
 588 static void w83977af_dma_write(struct w83977af_ir *self, int iobase)
 589 {
 590         __u8 set;
 591 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 592         unsigned long flags;
 593         __u8 hcr;
 594 #endif
 595         IRDA_DEBUG(4, "%s(), len=%d\n", __func__ , self->tx_buff.len);
 596
 597         /* Save current set */
 598         set = inb(iobase+SSR);
 599
 600         /* Disable DMA */
 601         switch_bank(iobase, SET0);
 602         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 603
 604         /* Choose transmit DMA channel  */
 605         switch_bank(iobase, SET2);
 606         outb(ADCR1_D_CHSW|/*ADCR1_DMA_F|*/ADCR1_ADV_SL, iobase+ADCR1);
 607 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 608         spin_lock_irqsave(&self->lock, flags);
 609
 610         disable_dma(self->io.dma);
 611         clear_dma_ff(self->io.dma);
 612         set_dma_mode(self->io.dma, DMA_MODE_READ);
 613         set_dma_addr(self->io.dma, self->tx_buff_dma);
 614         set_dma_count(self->io.dma, self->tx_buff.len);
 615 #else
 616         irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
 617                        DMA_MODE_WRITE);
 618 #endif
 619         self->io.direction = IO_XMIT;
 620
 621         /* Enable DMA */
 622         switch_bank(iobase, SET0);
 623 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 624         hcr = inb(iobase+HCR);
 625         outb(hcr | HCR_EN_DMA, iobase+HCR);
 626         enable_dma(self->io.dma);
 627         spin_unlock_irqrestore(&self->lock, flags);
 628 #else
 629         outb(inb(iobase+HCR) | HCR_EN_DMA | HCR_TX_WT, iobase+HCR);
 630 #endif
 631
 632         /* Restore set register */
 633         outb(set, iobase+SSR);
 634 }
 635
 636 /*
 637  * Function w83977af_pio_write (iobase, buf, len, fifo_size)
 638  *
 639  *
 640  *
 641  */
 642 static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
 643 {
 644         int actual = 0;
 645         __u8 set;
 646
 647         IRDA_DEBUG(4, "%s()\n", __func__ );
 648
 649         /* Save current bank */
 650         set = inb(iobase+SSR);
 651
 652         switch_bank(iobase, SET0);
 653         if (!(inb_p(iobase+USR) & USR_TSRE)) {
 654                 IRDA_DEBUG(4,
 655                            "%s(), warning, FIFO not empty yet!\n", __func__  );
 656
 657                 fifo_size -= 17;
 658                 IRDA_DEBUG(4, "%s(), %d bytes left in tx fifo\n",
 659                            __func__ , fifo_size);
 660         }
 661
 662         /* Fill FIFO with current frame */
 663         while ((fifo_size-- > 0) && (actual < len)) {
 664                 /* Transmit next byte */
 665                 outb(buf[actual++], iobase+TBR);
 666         }
 667
 668         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
 669                    __func__ , fifo_size, actual, len);
 670
 671         /* Restore bank */
 672         outb(set, iobase+SSR);
 673
 674         return actual;
 675 }
 676
 677 /*
 678  * Function w83977af_dma_xmit_complete (self)
 679  *
 680  *    The transfer of a frame in finished. So do the necessary things
 681  *
 682  *
 683  */
 684 static void w83977af_dma_xmit_complete(struct w83977af_ir *self)
 685 {
 686         int iobase;
 687         __u8 set;
 688
 689         IRDA_DEBUG(4, "%s(%ld)\n", __func__ , jiffies);
 690
 691         IRDA_ASSERT(self != NULL, return;);
 692
 693         iobase = self->io.fir_base;
 694
 695         /* Save current set */
 696         set = inb(iobase+SSR);
 697
 698         /* Disable DMA */
 699         switch_bank(iobase, SET0);
 700         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 701
 702         /* Check for underrrun! */
 703         if (inb(iobase+AUDR) & AUDR_UNDR) {
 704                 IRDA_DEBUG(0, "%s(), Transmit underrun!\n", __func__ );
 705
 706                 self->netdev->stats.tx_errors++;
 707                 self->netdev->stats.tx_fifo_errors++;
 708
 709                 /* Clear bit, by writing 1 to it */
 710                 outb(AUDR_UNDR, iobase+AUDR);
 711         } else
 712                 self->netdev->stats.tx_packets++;
 713
 714
 715         if (self->new_speed) {
 716                 w83977af_change_speed(self, self->new_speed);
 717                 self->new_speed = 0;
 718         }
 719
 720         /* Unlock tx_buff and request another frame */
 721         /* Tell the network layer, that we want more frames */
 722         netif_wake_queue(self->netdev);
 723
 724         /* Restore set */
 725         outb(set, iobase+SSR);
 726 }
 727
 728 /*
 729  * Function w83977af_dma_receive (self)
 730  *
 731  *    Get ready for receiving a frame. The device will initiate a DMA
 732  *    if it starts to receive a frame.
 733  *
 734  */
 735 static int w83977af_dma_receive(struct w83977af_ir *self)
 736 {
 737         int iobase;
 738         __u8 set;
 739 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 740         unsigned long flags;
 741         __u8 hcr;
 742 #endif
 743         IRDA_ASSERT(self != NULL, return -1;);
 744
 745         IRDA_DEBUG(4, "%s\n", __func__ );
 746
 747         iobase= self->io.fir_base;
 748
 749         /* Save current set */
 750         set = inb(iobase+SSR);
 751
 752         /* Disable DMA */
 753         switch_bank(iobase, SET0);
 754         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 755
 756         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
 757         switch_bank(iobase, SET2);
 758         outb((inb(iobase+ADCR1) & ~ADCR1_D_CHSW)/*|ADCR1_DMA_F*/|ADCR1_ADV_SL,
 759              iobase+ADCR1);
 760
 761         self->io.direction = IO_RECV;
 762         self->rx_buff.data = self->rx_buff.head;
 763
 764 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 765         spin_lock_irqsave(&self->lock, flags);
 766
 767         disable_dma(self->io.dma);
 768         clear_dma_ff(self->io.dma);
 769         set_dma_mode(self->io.dma, DMA_MODE_READ);
 770         set_dma_addr(self->io.dma, self->rx_buff_dma);
 771         set_dma_count(self->io.dma, self->rx_buff.truesize);
 772 #else
 773         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
 774                        DMA_MODE_READ);
 775 #endif
 776         /*
 777          * Reset Rx FIFO. This will also flush the ST_FIFO, it's very
 778          * important that we don't reset the Tx FIFO since it might not
 779          * be finished transmitting yet
 780          */
 781         switch_bank(iobase, SET0);
 782         outb(UFR_RXTL|UFR_TXTL|UFR_RXF_RST|UFR_EN_FIFO, iobase+UFR);
 783         self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0;
 784
 785         /* Enable DMA */
 786         switch_bank(iobase, SET0);
 787 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 788         hcr = inb(iobase+HCR);
 789         outb(hcr | HCR_EN_DMA, iobase+HCR);
 790         enable_dma(self->io.dma);
 791         spin_unlock_irqrestore(&self->lock, flags);
 792 #else
 793         outb(inb(iobase+HCR) | HCR_EN_DMA, iobase+HCR);
 794 #endif
 795         /* Restore set */
 796         outb(set, iobase+SSR);
 797
 798         return 0;
 799 }
 800
 801 /*
 802  * Function w83977af_receive_complete (self)
 803  *
 804  *    Finished with receiving a frame
 805  *
 806  */
 807 static int w83977af_dma_receive_complete(struct w83977af_ir *self)
 808 {
 809         struct sk_buff *skb;
 810         struct st_fifo *st_fifo;
 811         int len;
 812         int iobase;
 813         __u8 set;
 814         __u8 status;
 815
 816         IRDA_DEBUG(4, "%s\n", __func__ );
 817
 818         st_fifo = &self->st_fifo;
 819
 820         iobase = self->io.fir_base;
 821
 822         /* Save current set */
 823         set = inb(iobase+SSR);
 824
 825         iobase = self->io.fir_base;
 826
 827         /* Read status FIFO */
 828         switch_bank(iobase, SET5);
 829         while ((status = inb(iobase+FS_FO)) & FS_FO_FSFDR) {
 830                 st_fifo->entries[st_fifo->tail].status = status;
 831
 832                 st_fifo->entries[st_fifo->tail].len  = inb(iobase+RFLFL);
 833                 st_fifo->entries[st_fifo->tail].len |= inb(iobase+RFLFH) << 8;
 834
 835                 st_fifo->tail++;
 836                 st_fifo->len++;
 837         }
 838
 839         while (st_fifo->len) {
 840                 /* Get first entry */
 841                 status = st_fifo->entries[st_fifo->head].status;
 842                 len    = st_fifo->entries[st_fifo->head].len;
 843                 st_fifo->head++;
 844                 st_fifo->len--;
 845
 846                 /* Check for errors */
 847                 if (status & FS_FO_ERR_MSK) {
 848                         if (status & FS_FO_LST_FR) {
 849                                 /* Add number of lost frames to stats */
 850                                 self->netdev->stats.rx_errors += len;
 851                         } else {
 852                                 /* Skip frame */
 853                                 self->netdev->stats.rx_errors++;
 854
 855                                 self->rx_buff.data += len;
 856
 857                                 if (status & FS_FO_MX_LEX)
 858                                         self->netdev->stats.rx_length_errors++;
 859
 860                                 if (status & FS_FO_PHY_ERR)
 861                                         self->netdev->stats.rx_frame_errors++;
 862
 863                                 if (status & FS_FO_CRC_ERR)
 864                                         self->netdev->stats.rx_crc_errors++;
 865                         }
 866                         /* The errors below can be reported in both cases */
 867                         if (status & FS_FO_RX_OV)
 868                                 self->netdev->stats.rx_fifo_errors++;
 869
 870                         if (status & FS_FO_FSF_OV)
 871                                 self->netdev->stats.rx_fifo_errors++;
 872
 873                 } else {
 874                         /* Check if we have transferred all data to memory */
 875                         switch_bank(iobase, SET0);
 876                         if (inb(iobase+USR) & USR_RDR) {
 877 #ifdef CONFIG_USE_INTERNAL_TIMER
 878                                 /* Put this entry back in fifo */
 879                                 st_fifo->head--;
 880                                 st_fifo->len++;
 881                                 st_fifo->entries[st_fifo->head].status = status;
 882                                 st_fifo->entries[st_fifo->head].len = len;
 883
 884                                 /* Restore set register */
 885                                 outb(set, iobase+SSR);
 886
 887                                 return FALSE;   /* I'll be back! */
 888 #else
 889                                 udelay(80); /* Should be enough!? */
 890 #endif
 891                         }
 892
 893                         skb = dev_alloc_skb(len+1);
 894                         if (skb == NULL)  {
 895                                 printk(KERN_INFO
 896                                        "%s(), memory squeeze, dropping frame.\n", __func__);
 897                                 /* Restore set register */
 898                                 outb(set, iobase+SSR);
 899
 900                                 return FALSE;
 901                         }
 902
 903                         /*  Align to 20 bytes */
 904                         skb_reserve(skb, 1);
 905
 906                         /* Copy frame without CRC */
 907                         if (self->io.speed < 4000000) {
 908                                 skb_put(skb, len-2);
 909                                 skb_copy_to_linear_data(skb,
 910                                                         self->rx_buff.data,
 911                                                         len - 2);
 912                         } else {
 913                                 skb_put(skb, len-4);
 914                                 skb_copy_to_linear_data(skb,
 915                                                         self->rx_buff.data,
 916                                                         len - 4);
 917                         }
 918
 919                         /* Move to next frame */
 920                         self->rx_buff.data += len;
 921                         self->netdev->stats.rx_packets++;
 922
 923                         skb->dev = self->netdev;
 924                         skb_reset_mac_header(skb);
 925                         skb->protocol = htons(ETH_P_IRDA);
 926                         netif_rx(skb);
 927                 }
 928         }
 929         /* Restore set register */
 930         outb(set, iobase+SSR);
 931
 932         return TRUE;
 933 }
 934
 935 /*
 936  * Function pc87108_pio_receive (self)
 937  *
 938  *    Receive all data in receiver FIFO
 939  *
 940  */
 941 static void w83977af_pio_receive(struct w83977af_ir *self)
 942 {
 943         __u8 byte = 0x00;
 944         int iobase;
 945
 946         IRDA_DEBUG(4, "%s()\n", __func__ );
 947
 948         IRDA_ASSERT(self != NULL, return;);
 949
 950         iobase = self->io.fir_base;
 951
 952         /*  Receive all characters in Rx FIFO */
 953         do {
 954                 byte = inb(iobase+RBR);
 955                 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
 956                                   byte);
 957         } while (inb(iobase+USR) & USR_RDR); /* Data available */
 958 }
 959
 960 /*
 961  * Function w83977af_sir_interrupt (self, eir)
 962  *
 963  *    Handle SIR interrupt
 964  *
 965  */
 966 static __u8 w83977af_sir_interrupt(struct w83977af_ir *self, int isr)
 967 {
 968         int actual;
 969         __u8 new_icr = 0;
 970         __u8 set;
 971         int iobase;
 972
 973         IRDA_DEBUG(4, "%s(), isr=%#x\n", __func__ , isr);
 974
 975         iobase = self->io.fir_base;
 976         /* Transmit FIFO low on data */
 977         if (isr & ISR_TXTH_I) {
 978                 /* Write data left in transmit buffer */
 979                 actual = w83977af_pio_write(self->io.fir_base,
 980                                             self->tx_buff.data,
 981                                             self->tx_buff.len,
 982                                             self->io.fifo_size);
 983
 984                 self->tx_buff.data += actual;
 985                 self->tx_buff.len  -= actual;
 986
 987                 self->io.direction = IO_XMIT;
 988
 989                 /* Check if finished */
 990                 if (self->tx_buff.len > 0) {
 991                         new_icr |= ICR_ETXTHI;
 992                 } else {
 993                         set = inb(iobase+SSR);
 994                         switch_bank(iobase, SET0);
 995                         outb(AUDR_SFEND, iobase+AUDR);
 996                         outb(set, iobase+SSR);
 997
 998                         self->netdev->stats.tx_packets++;
 999
1000                         /* Feed me more packets */
1001                         netif_wake_queue(self->netdev);
1002                         new_icr |= ICR_ETBREI;
1003                 }
1004         }
1005         /* Check if transmission has completed */
1006         if (isr & ISR_TXEMP_I) {
1007                 /* Check if we need to change the speed? */
1008                 if (self->new_speed) {
1009                         IRDA_DEBUG(2,
1010                                    "%s(), Changing speed!\n", __func__ );
1011                         w83977af_change_speed(self, self->new_speed);
1012                         self->new_speed = 0;
1013                 }
1014
1015                 /* Turn around and get ready to receive some data */
1016                 self->io.direction = IO_RECV;
1017                 new_icr |= ICR_ERBRI;
1018         }
1019
1020         /* Rx FIFO threshold or timeout */
1021         if (isr & ISR_RXTH_I) {
1022                 w83977af_pio_receive(self);
1023
1024                 /* Keep receiving */
1025                 new_icr |= ICR_ERBRI;
1026         }
1027         return new_icr;
1028 }
1029
1030 /*
1031  * Function pc87108_fir_interrupt (self, eir)
1032  *
1033  *    Handle MIR/FIR interrupt
1034  *
1035  */
1036 static __u8 w83977af_fir_interrupt(struct w83977af_ir *self, int isr)
1037 {
1038         __u8 new_icr = 0;
1039         __u8 set;
1040         int iobase;
1041
1042         iobase = self->io.fir_base;
1043         set = inb(iobase+SSR);
1044
1045         /* End of frame detected in FIFO */
1046         if (isr & (ISR_FEND_I|ISR_FSF_I)) {
1047                 if (w83977af_dma_receive_complete(self)) {
1048
1049                         /* Wait for next status FIFO interrupt */
1050                         new_icr |= ICR_EFSFI;
1051                 } else {
1052                         /* DMA not finished yet */
1053
1054                         /* Set timer value, resolution 1 ms */
1055                         switch_bank(iobase, SET4);
1056                         outb(0x01, iobase+TMRL); /* 1 ms */
1057                         outb(0x00, iobase+TMRH);
1058
1059                         /* Start timer */
1060                         outb(IR_MSL_EN_TMR, iobase+IR_MSL);
1061
1062                         new_icr |= ICR_ETMRI;
1063                 }
1064         }
1065         /* Timer finished */
1066         if (isr & ISR_TMR_I) {
1067                 /* Disable timer */
1068                 switch_bank(iobase, SET4);
1069                 outb(0, iobase+IR_MSL);
1070
1071                 /* Clear timer event */
1072                 /* switch_bank(iobase, SET0); */
1073 /*              outb(ASCR_CTE, iobase+ASCR); */
1074
1075                 /* Check if this is a TX timer interrupt */
1076                 if (self->io.direction == IO_XMIT) {
1077                         w83977af_dma_write(self, iobase);
1078
1079                         new_icr |= ICR_EDMAI;
1080                 } else {
1081                         /* Check if DMA has now finished */
1082                         w83977af_dma_receive_complete(self);
1083
1084                         new_icr |= ICR_EFSFI;
1085                 }
1086         }
1087         /* Finished with DMA */
1088         if (isr & ISR_DMA_I) {
1089                 w83977af_dma_xmit_complete(self);
1090
1091                 /* Check if there are more frames to be transmitted */
1092                 /* if (irda_device_txqueue_empty(self)) { */
1093
1094                 /* Prepare for receive
1095                  *
1096                  * ** Netwinder Tx DMA likes that we do this anyway **
1097                  */
1098                 w83977af_dma_receive(self);
1099                 new_icr = ICR_EFSFI;
1100                /* } */
1101         }
1102
1103         /* Restore set */
1104         outb(set, iobase+SSR);
1105
1106         return new_icr;
1107 }
1108
1109 /*
1110  * Function w83977af_interrupt (irq, dev_id, regs)
1111  *
1112  *    An interrupt from the chip has arrived. Time to do some work
1113  *
1114  */
1115 static irqreturn_t w83977af_interrupt(int irq, void *dev_id)
1116 {
1117         struct net_device *dev = dev_id;
1118         struct w83977af_ir *self;
1119         __u8 set, icr, isr;
1120         int iobase;
1121
1122         self = netdev_priv(dev);
1123
1124         iobase = self->io.fir_base;
1125
1126         /* Save current bank */
1127         set = inb(iobase+SSR);
1128         switch_bank(iobase, SET0);
1129
1130         icr = inb(iobase+ICR);
1131         isr = inb(iobase+ISR) & icr; /* Mask out the interesting ones */
1132
1133         outb(0, iobase+ICR); /* Disable interrupts */
1134
1135         if (isr) {
1136                 /* Dispatch interrupt handler for the current speed */
1137                 if (self->io.speed > PIO_MAX_SPEED )
1138                         icr = w83977af_fir_interrupt(self, isr);
1139                 else
1140                         icr = w83977af_sir_interrupt(self, isr);
1141         }
1142
1143         outb(icr, iobase+ICR);    /* Restore (new) interrupts */
1144         outb(set, iobase+SSR);    /* Restore bank register */
1145         return IRQ_RETVAL(isr);
1146 }
1147
1148 /*
1149  * Function w83977af_is_receiving (self)
1150  *
1151  *    Return TRUE is we are currently receiving a frame
1152  *
1153  */
1154 static int w83977af_is_receiving(struct w83977af_ir *self)
1155 {
1156         int status = FALSE;
1157         int iobase;
1158         __u8 set;
1159
1160         IRDA_ASSERT(self != NULL, return FALSE;);
1161
1162         if (self->io.speed > 115200) {
1163                 iobase = self->io.fir_base;
1164
1165                 /* Check if rx FIFO is not empty */
1166                 set = inb(iobase+SSR);
1167                 switch_bank(iobase, SET2);
1168                 if ((inb(iobase+RXFDTH) & 0x3f) != 0) {
1169                         /* We are receiving something */
1170                         status =  TRUE;
1171                 }
1172                 outb(set, iobase+SSR);
1173         } else
1174                 status = (self->rx_buff.state != OUTSIDE_FRAME);
1175
1176         return status;
1177 }
1178
1179 /*
1180  * Function w83977af_net_open (dev)
1181  *
1182  *    Start the device
1183  *
1184  */
1185 static int w83977af_net_open(struct net_device *dev)
1186 {
1187         struct w83977af_ir *self;
1188         int iobase;
1189         char hwname[32];
1190         __u8 set;
1191
1192         IRDA_DEBUG(0, "%s()\n", __func__ );
1193
1194         IRDA_ASSERT(dev != NULL, return -1;);
1195         self = netdev_priv(dev);
1196
1197         IRDA_ASSERT(self != NULL, return 0;);
1198
1199         iobase = self->io.fir_base;
1200
1201         if (request_irq(self->io.irq, w83977af_interrupt, 0, dev->name,
1202                         (void *) dev)) {
1203                 return -EAGAIN;
1204         }
1205         /*
1206          * Always allocate the DMA channel after the IRQ,
1207          * and clean up on failure.
1208          */
1209         if (request_dma(self->io.dma, dev->name)) {
1210                 free_irq(self->io.irq, self);
1211                 return -EAGAIN;
1212         }
1213
1214         /* Save current set */
1215         set = inb(iobase+SSR);
1216
1217         /* Enable some interrupts so we can receive frames again */
1218         switch_bank(iobase, SET0);
1219         if (self->io.speed > 115200) {
1220                 outb(ICR_EFSFI, iobase+ICR);
1221                 w83977af_dma_receive(self);
1222         } else
1223                 outb(ICR_ERBRI, iobase+ICR);
1224
1225         /* Restore bank register */
1226         outb(set, iobase+SSR);
1227
1228         /* Ready to play! */
1229         netif_start_queue(dev);
1230
1231         /* Give self a hardware name */
1232         sprintf(hwname, "w83977af @ 0x%03x", self->io.fir_base);
1233
1234         /*
1235          * Open new IrLAP layer instance, now that everything should be
1236          * initialized properly
1237          */
1238         self->irlap = irlap_open(dev, &self->qos, hwname);
1239
1240         return 0;
1241 }
1242
1243 /*
1244  * Function w83977af_net_close (dev)
1245  *
1246  *    Stop the device
1247  *
1248  */
1249 static int w83977af_net_close(struct net_device *dev)
1250 {
1251         struct w83977af_ir *self;
1252         int iobase;
1253         __u8 set;
1254
1255         IRDA_DEBUG(0, "%s()\n", __func__ );
1256
1257         IRDA_ASSERT(dev != NULL, return -1;);
1258
1259         self = netdev_priv(dev);
1260
1261         IRDA_ASSERT(self != NULL, return 0;);
1262
1263         iobase = self->io.fir_base;
1264
1265         /* Stop device */
1266         netif_stop_queue(dev);
1267
1268         /* Stop and remove instance of IrLAP */
1269         if (self->irlap)
1270                 irlap_close(self->irlap);
1271         self->irlap = NULL;
1272
1273         disable_dma(self->io.dma);
1274
1275         /* Save current set */
1276         set = inb(iobase+SSR);
1277
1278         /* Disable interrupts */
1279         switch_bank(iobase, SET0);
1280         outb(0, iobase+ICR);
1281
1282         free_irq(self->io.irq, dev);
1283         free_dma(self->io.dma);
1284
1285         /* Restore bank register */
1286         outb(set, iobase+SSR);
1287
1288         return 0;
1289 }
1290
1291 /*
1292  * Function w83977af_net_ioctl (dev, rq, cmd)
1293  *
1294  *    Process IOCTL commands for this device
1295  *
1296  */
1297 static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1298 {
1299         struct if_irda_req *irq = (struct if_irda_req *) rq;
1300         struct w83977af_ir *self;
1301         unsigned long flags;
1302         int ret = 0;
1303
1304         IRDA_ASSERT(dev != NULL, return -1;);
1305
1306         self = netdev_priv(dev);
1307
1308         IRDA_ASSERT(self != NULL, return -1;);
1309
1310         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
1311
1312         spin_lock_irqsave(&self->lock, flags);
1313
1314         switch (cmd) {
1315         case SIOCSBANDWIDTH: /* Set bandwidth */
1316                 if (!capable(CAP_NET_ADMIN)) {
1317                         ret = -EPERM;
1318                         goto out;
1319                 }
1320                 w83977af_change_speed(self, irq->ifr_baudrate);
1321                 break;
1322         case SIOCSMEDIABUSY: /* Set media busy */
1323                 if (!capable(CAP_NET_ADMIN)) {
1324                         ret = -EPERM;
1325                         goto out;
1326                 }
1327                 irda_device_set_media_busy(self->netdev, TRUE);
1328                 break;
1329         case SIOCGRECEIVING: /* Check if we are receiving right now */
1330                 irq->ifr_receiving = w83977af_is_receiving(self);
1331                 break;
1332         default:
1333                 ret = -EOPNOTSUPP;
1334         }
1335 out:
1336         spin_unlock_irqrestore(&self->lock, flags);
1337         return ret;
1338 }
1339
1340 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
1341 MODULE_DESCRIPTION("Winbond W83977AF IrDA Device Driver");
1342 MODULE_LICENSE("GPL");
1343
1344
1345 module_param(qos_mtt_bits, int, 0);
1346 MODULE_PARM_DESC(qos_mtt_bits, "Mimimum Turn Time");
1347 module_param_array(io, int, NULL, 0);
1348 MODULE_PARM_DESC(io, "Base I/O addresses");
1349 module_param_array(irq, int, NULL, 0);
1350 MODULE_PARM_DESC(irq, "IRQ lines");
1351
1352 /*
1353  * Function init_module (void)
1354  *
1355  *
1356  *
1357  */
1358 module_init(w83977af_init);
1359
1360 /*
1361  * Function cleanup_module (void)
1362  *
1363  *
1364  *
1365  */
1366 module_exit(w83977af_cleanup);