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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 static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev);
 106
 107 /*
 108  * Function w83977af_init ()
 109  *
 110  *    Initialize chip. Just try to find out how many chips we are dealing with
 111  *    and where they are
 112  */
 113 static int __init w83977af_init(void)
 114 {
 115         int i;
 116
 117         IRDA_DEBUG(0, "%s()\n", __func__ );
 118
 119         for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) {
 120                 if (w83977af_open(i, io[i], irq[i], dma[i]) == 0)
 121                         return 0;
 122         }
 123         return -ENODEV;
 124 }
 125
 126 /*
 127  * Function w83977af_cleanup ()
 128  *
 129  *    Close all configured chips
 130  *
 131  */
 132 static void __exit w83977af_cleanup(void)
 133 {
 134         int i;
 135
 136         IRDA_DEBUG(4, "%s()\n", __func__ );
 137
 138         for (i=0; i < ARRAY_SIZE(dev_self); i++) {
 139                 if (dev_self[i])
 140                         w83977af_close(dev_self[i]);
 141         }
 142 }
 143
 144 /*
 145  * Function w83977af_open (iobase, irq)
 146  *
 147  *    Open driver instance
 148  *
 149  */
 150 int w83977af_open(int i, unsigned int iobase, unsigned int irq,
 151                   unsigned int dma)
 152 {
 153         struct net_device *dev;
 154         struct w83977af_ir *self;
 155         int err;
 156
 157         IRDA_DEBUG(0, "%s()\n", __func__ );
 158
 159         /* Lock the port that we need */
 160         if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
 161                 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
 162                       __func__ , iobase);
 163                 return -ENODEV;
 164         }
 165
 166         if (w83977af_probe(iobase, irq, dma) == -1) {
 167                 err = -1;
 168                 goto err_out;
 169         }
 170         /*
 171          *  Allocate new instance of the driver
 172          */
 173         dev = alloc_irdadev(sizeof(struct w83977af_ir));
 174         if (dev == NULL) {
 175                 printk( KERN_ERR "IrDA: Can't allocate memory for "
 176                         "IrDA control block!\n");
 177                 err = -ENOMEM;
 178                 goto err_out;
 179         }
 180
 181         self = dev->priv;
 182         spin_lock_init(&self->lock);
 183
 184
 185         /* Initialize IO */
 186         self->io.fir_base   = iobase;
 187         self->io.irq       = irq;
 188         self->io.fir_ext   = CHIP_IO_EXTENT;
 189         self->io.dma       = dma;
 190         self->io.fifo_size = 32;
 191
 192         /* Initialize QoS for this device */
 193         irda_init_max_qos_capabilies(&self->qos);
 194
 195         /* The only value we must override it the baudrate */
 196
 197         /* FIXME: The HP HDLS-1100 does not support 1152000! */
 198         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 199                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
 200
 201         /* The HP HDLS-1100 needs 1 ms according to the specs */
 202         self->qos.min_turn_time.bits = qos_mtt_bits;
 203         irda_qos_bits_to_value(&self->qos);
 204
 205         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 206         self->rx_buff.truesize = 14384;
 207         self->tx_buff.truesize = 4000;
 208
 209         /* Allocate memory if needed */
 210         self->rx_buff.head =
 211                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 212                                    &self->rx_buff_dma, GFP_KERNEL);
 213         if (self->rx_buff.head == NULL) {
 214                 err = -ENOMEM;
 215                 goto err_out1;
 216         }
 217
 218         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 219
 220         self->tx_buff.head =
 221                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 222                                    &self->tx_buff_dma, GFP_KERNEL);
 223         if (self->tx_buff.head == NULL) {
 224                 err = -ENOMEM;
 225                 goto err_out2;
 226         }
 227         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 228
 229         self->rx_buff.in_frame = FALSE;
 230         self->rx_buff.state = OUTSIDE_FRAME;
 231         self->tx_buff.data = self->tx_buff.head;
 232         self->rx_buff.data = self->rx_buff.head;
 233         self->netdev = dev;
 234
 235         /* Override the network functions we need to use */
 236         dev->hard_start_xmit = w83977af_hard_xmit;
 237         dev->open            = w83977af_net_open;
 238         dev->stop            = w83977af_net_close;
 239         dev->do_ioctl        = w83977af_net_ioctl;
 240         dev->get_stats       = w83977af_net_get_stats;
 241
 242         err = register_netdev(dev);
 243         if (err) {
 244                 IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__);
 245                 goto err_out3;
 246         }
 247         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 248
 249         /* Need to store self somewhere */
 250         dev_self[i] = self;
 251
 252         return 0;
 253 err_out3:
 254         dma_free_coherent(NULL, self->tx_buff.truesize,
 255                           self->tx_buff.head, self->tx_buff_dma);
 256 err_out2:
 257         dma_free_coherent(NULL, self->rx_buff.truesize,
 258                           self->rx_buff.head, self->rx_buff_dma);
 259 err_out1:
 260         free_netdev(dev);
 261 err_out:
 262         release_region(iobase, CHIP_IO_EXTENT);
 263         return err;
 264 }
 265
 266 /*
 267  * Function w83977af_close (self)
 268  *
 269  *    Close driver instance
 270  *
 271  */
 272 static int w83977af_close(struct w83977af_ir *self)
 273 {
 274         int iobase;
 275
 276         IRDA_DEBUG(0, "%s()\n", __func__ );
 277
 278         iobase = self->io.fir_base;
 279
 280 #ifdef CONFIG_USE_W977_PNP
 281         /* enter PnP configuration mode */
 282         w977_efm_enter(efio);
 283
 284         w977_select_device(W977_DEVICE_IR, efio);
 285
 286         /* Deactivate device */
 287         w977_write_reg(0x30, 0x00, efio);
 288
 289         w977_efm_exit(efio);
 290 #endif /* CONFIG_USE_W977_PNP */
 291
 292         /* Remove netdevice */
 293         unregister_netdev(self->netdev);
 294
 295         /* Release the PORT that this driver is using */
 296         IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n",
 297               __func__ , self->io.fir_base);
 298         release_region(self->io.fir_base, self->io.fir_ext);
 299
 300         if (self->tx_buff.head)
 301                 dma_free_coherent(NULL, self->tx_buff.truesize,
 302                                   self->tx_buff.head, self->tx_buff_dma);
 303
 304         if (self->rx_buff.head)
 305                 dma_free_coherent(NULL, self->rx_buff.truesize,
 306                                   self->rx_buff.head, self->rx_buff_dma);
 307
 308         free_netdev(self->netdev);
 309
 310         return 0;
 311 }
 312
 313 int w83977af_probe( int iobase, int irq, int dma)
 314 {
 315         int version;
 316         int i;
 317
 318         for (i=0; i < 2; i++) {
 319                 IRDA_DEBUG( 0, "%s()\n", __func__ );
 320 #ifdef CONFIG_USE_W977_PNP
 321                 /* Enter PnP configuration mode */
 322                 w977_efm_enter(efbase[i]);
 323
 324                 w977_select_device(W977_DEVICE_IR, efbase[i]);
 325
 326                 /* Configure PnP port, IRQ, and DMA channel */
 327                 w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]);
 328                 w977_write_reg(0x61, (iobase) & 0xff, efbase[i]);
 329
 330                 w977_write_reg(0x70, irq, efbase[i]);
 331 #ifdef CONFIG_ARCH_NETWINDER
 332                 /* Netwinder uses 1 higher than Linux */
 333                 w977_write_reg(0x74, dma+1, efbase[i]);
 334 #else
 335                 w977_write_reg(0x74, dma, efbase[i]);
 336 #endif /*CONFIG_ARCH_NETWINDER */
 337                 w977_write_reg(0x75, 0x04, efbase[i]);  /* Disable Tx DMA */
 338
 339                 /* Set append hardware CRC, enable IR bank selection */
 340                 w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]);
 341
 342                 /* Activate device */
 343                 w977_write_reg(0x30, 0x01, efbase[i]);
 344
 345                 w977_efm_exit(efbase[i]);
 346 #endif /* CONFIG_USE_W977_PNP */
 347                 /* Disable Advanced mode */
 348                 switch_bank(iobase, SET2);
 349                 outb(iobase+2, 0x00);
 350
 351                 /* Turn on UART (global) interrupts */
 352                 switch_bank(iobase, SET0);
 353                 outb(HCR_EN_IRQ, iobase+HCR);
 354
 355                 /* Switch to advanced mode */
 356                 switch_bank(iobase, SET2);
 357                 outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1);
 358
 359                 /* Set default IR-mode */
 360                 switch_bank(iobase, SET0);
 361                 outb(HCR_SIR, iobase+HCR);
 362
 363                 /* Read the Advanced IR ID */
 364                 switch_bank(iobase, SET3);
 365                 version = inb(iobase+AUID);
 366
 367                 /* Should be 0x1? */
 368                 if (0x10 == (version & 0xf0)) {
 369                         efio = efbase[i];
 370
 371                         /* Set FIFO size to 32 */
 372                         switch_bank(iobase, SET2);
 373                         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 374
 375                         /* Set FIFO threshold to TX17, RX16 */
 376                         switch_bank(iobase, SET0);
 377                         outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST|
 378                              UFR_EN_FIFO,iobase+UFR);
 379
 380                         /* Receiver frame length */
 381                         switch_bank(iobase, SET4);
 382                         outb(2048 & 0xff, iobase+6);
 383                         outb((2048 >> 8) & 0x1f, iobase+7);
 384
 385                         /*
 386                          * Init HP HSDL-1100 transceiver.
 387                          *
 388                          * Set IRX_MSL since we have 2 * receive paths IRRX,
 389                          * and IRRXH. Clear IRSL0D since we want IRSL0 * to
 390                          * be a input pin used for IRRXH
 391                          *
 392                          *   IRRX  pin 37 connected to receiver
 393                          *   IRTX  pin 38 connected to transmitter
 394                          *   FIRRX pin 39 connected to receiver      (IRSL0)
 395                          *   CIRRX pin 40 connected to pin 37
 396                          */
 397                         switch_bank(iobase, SET7);
 398                         outb(0x40, iobase+7);
 399
 400                         IRDA_MESSAGE("W83977AF (IR) driver loaded. "
 401                                      "Version: 0x%02x\n", version);
 402
 403                         return 0;
 404                 } else {
 405                         /* Try next extented function register address */
 406                         IRDA_DEBUG( 0, "%s(), Wrong chip version", __func__ );
 407                 }
 408         }
 409         return -1;
 410 }
 411
 412 void w83977af_change_speed(struct w83977af_ir *self, __u32 speed)
 413 {
 414         int ir_mode = HCR_SIR;
 415         int iobase;
 416         __u8 set;
 417
 418         iobase = self->io.fir_base;
 419
 420         /* Update accounting for new speed */
 421         self->io.speed = speed;
 422
 423         /* Save current bank */
 424         set = inb(iobase+SSR);
 425
 426         /* Disable interrupts */
 427         switch_bank(iobase, SET0);
 428         outb(0, iobase+ICR);
 429
 430         /* Select Set 2 */
 431         switch_bank(iobase, SET2);
 432         outb(0x00, iobase+ABHL);
 433
 434         switch (speed) {
 435         case 9600:   outb(0x0c, iobase+ABLL); break;
 436         case 19200:  outb(0x06, iobase+ABLL); break;
 437         case 38400:  outb(0x03, iobase+ABLL); break;
 438         case 57600:  outb(0x02, iobase+ABLL); break;
 439         case 115200: outb(0x01, iobase+ABLL); break;
 440         case 576000:
 441                 ir_mode = HCR_MIR_576;
 442                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__ );
 443                 break;
 444         case 1152000:
 445                 ir_mode = HCR_MIR_1152;
 446                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__ );
 447                 break;
 448         case 4000000:
 449                 ir_mode = HCR_FIR;
 450                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__ );
 451                 break;
 452         default:
 453                 ir_mode = HCR_FIR;
 454                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __func__ , speed);
 455                 break;
 456         }
 457
 458         /* Set speed mode */
 459         switch_bank(iobase, SET0);
 460         outb(ir_mode, iobase+HCR);
 461
 462         /* set FIFO size to 32 */
 463         switch_bank(iobase, SET2);
 464         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 465
 466         /* set FIFO threshold to TX17, RX16 */
 467         switch_bank(iobase, SET0);
 468         outb(0x00, iobase+UFR);        /* Reset */
 469         outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */
 470         outb(0xa7, iobase+UFR);
 471
 472         netif_wake_queue(self->netdev);
 473
 474         /* Enable some interrupts so we can receive frames */
 475         switch_bank(iobase, SET0);
 476         if (speed > PIO_MAX_SPEED) {
 477                 outb(ICR_EFSFI, iobase+ICR);
 478                 w83977af_dma_receive(self);
 479         } else
 480                 outb(ICR_ERBRI, iobase+ICR);
 481
 482         /* Restore SSR */
 483         outb(set, iobase+SSR);
 484 }
 485
 486 /*
 487  * Function w83977af_hard_xmit (skb, dev)
 488  *
 489  *    Sets up a DMA transfer to send the current frame.
 490  *
 491  */
 492 int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 493 {
 494         struct w83977af_ir *self;
 495         __s32 speed;
 496         int iobase;
 497         __u8 set;
 498         int mtt;
 499
 500         self = (struct w83977af_ir *) dev->priv;
 501
 502         iobase = self->io.fir_base;
 503
 504         IRDA_DEBUG(4, "%s(%ld), skb->len=%d\n", __func__ , jiffies,
 505                    (int) skb->len);
 506
 507         /* Lock transmit buffer */
 508         netif_stop_queue(dev);
 509
 510         /* Check if we need to change the speed */
 511         speed = irda_get_next_speed(skb);
 512         if ((speed != self->io.speed) && (speed != -1)) {
 513                 /* Check for empty frame */
 514                 if (!skb->len) {
 515                         w83977af_change_speed(self, speed);
 516                         dev->trans_start = jiffies;
 517                         dev_kfree_skb(skb);
 518                         return 0;
 519                 } else
 520                         self->new_speed = speed;
 521         }
 522
 523         /* Save current set */
 524         set = inb(iobase+SSR);
 525
 526         /* Decide if we should use PIO or DMA transfer */
 527         if (self->io.speed > PIO_MAX_SPEED) {
 528                 self->tx_buff.data = self->tx_buff.head;
 529                 skb_copy_from_linear_data(skb, self->tx_buff.data, skb->len);
 530                 self->tx_buff.len = skb->len;
 531
 532                 mtt = irda_get_mtt(skb);
 533 #ifdef CONFIG_USE_INTERNAL_TIMER
 534                 if (mtt > 50) {
 535                         /* Adjust for timer resolution */
 536                         mtt /= 1000+1;
 537
 538                         /* Setup timer */
 539                         switch_bank(iobase, SET4);
 540                         outb(mtt & 0xff, iobase+TMRL);
 541                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
 542
 543                         /* Start timer */
 544                         outb(IR_MSL_EN_TMR, iobase+IR_MSL);
 545                         self->io.direction = IO_XMIT;
 546
 547                         /* Enable timer interrupt */
 548                         switch_bank(iobase, SET0);
 549                         outb(ICR_ETMRI, iobase+ICR);
 550                 } else {
 551 #endif
 552                         IRDA_DEBUG(4, "%s(%ld), mtt=%d\n", __func__ , jiffies, mtt);
 553                         if (mtt)
 554                                 udelay(mtt);
 555
 556                         /* Enable DMA interrupt */
 557                         switch_bank(iobase, SET0);
 558                         outb(ICR_EDMAI, iobase+ICR);
 559                         w83977af_dma_write(self, iobase);
 560 #ifdef CONFIG_USE_INTERNAL_TIMER
 561                 }
 562 #endif
 563         } else {
 564                 self->tx_buff.data = self->tx_buff.head;
 565                 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
 566                                                    self->tx_buff.truesize);
 567
 568                 /* Add interrupt on tx low level (will fire immediately) */
 569                 switch_bank(iobase, SET0);
 570                 outb(ICR_ETXTHI, iobase+ICR);
 571         }
 572         dev->trans_start = jiffies;
 573         dev_kfree_skb(skb);
 574
 575         /* Restore set register */
 576         outb(set, iobase+SSR);
 577
 578         return 0;
 579 }
 580
 581 /*
 582  * Function w83977af_dma_write (self, iobase)
 583  *
 584  *    Send frame using DMA
 585  *
 586  */
 587 static void w83977af_dma_write(struct w83977af_ir *self, int iobase)
 588 {
 589         __u8 set;
 590 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 591         unsigned long flags;
 592         __u8 hcr;
 593 #endif
 594         IRDA_DEBUG(4, "%s(), len=%d\n", __func__ , self->tx_buff.len);
 595
 596         /* Save current set */
 597         set = inb(iobase+SSR);
 598
 599         /* Disable DMA */
 600         switch_bank(iobase, SET0);
 601         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 602
 603         /* Choose transmit DMA channel  */
 604         switch_bank(iobase, SET2);
 605         outb(ADCR1_D_CHSW|/*ADCR1_DMA_F|*/ADCR1_ADV_SL, iobase+ADCR1);
 606 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 607         spin_lock_irqsave(&self->lock, flags);
 608
 609         disable_dma(self->io.dma);
 610         clear_dma_ff(self->io.dma);
 611         set_dma_mode(self->io.dma, DMA_MODE_READ);
 612         set_dma_addr(self->io.dma, self->tx_buff_dma);
 613         set_dma_count(self->io.dma, self->tx_buff.len);
 614 #else
 615         irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
 616                        DMA_MODE_WRITE);
 617 #endif
 618         self->io.direction = IO_XMIT;
 619
 620         /* Enable DMA */
 621         switch_bank(iobase, SET0);
 622 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 623         hcr = inb(iobase+HCR);
 624         outb(hcr | HCR_EN_DMA, iobase+HCR);
 625         enable_dma(self->io.dma);
 626         spin_unlock_irqrestore(&self->lock, flags);
 627 #else
 628         outb(inb(iobase+HCR) | HCR_EN_DMA | HCR_TX_WT, iobase+HCR);
 629 #endif
 630
 631         /* Restore set register */
 632         outb(set, iobase+SSR);
 633 }
 634
 635 /*
 636  * Function w83977af_pio_write (iobase, buf, len, fifo_size)
 637  *
 638  *
 639  *
 640  */
 641 static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
 642 {
 643         int actual = 0;
 644         __u8 set;
 645
 646         IRDA_DEBUG(4, "%s()\n", __func__ );
 647
 648         /* Save current bank */
 649         set = inb(iobase+SSR);
 650
 651         switch_bank(iobase, SET0);
 652         if (!(inb_p(iobase+USR) & USR_TSRE)) {
 653                 IRDA_DEBUG(4,
 654                            "%s(), warning, FIFO not empty yet!\n", __func__  );
 655
 656                 fifo_size -= 17;
 657                 IRDA_DEBUG(4, "%s(), %d bytes left in tx fifo\n",
 658                            __func__ , fifo_size);
 659         }
 660
 661         /* Fill FIFO with current frame */
 662         while ((fifo_size-- > 0) && (actual < len)) {
 663                 /* Transmit next byte */
 664                 outb(buf[actual++], iobase+TBR);
 665         }
 666
 667         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
 668                    __func__ , fifo_size, actual, len);
 669
 670         /* Restore bank */
 671         outb(set, iobase+SSR);
 672
 673         return actual;
 674 }
 675
 676 /*
 677  * Function w83977af_dma_xmit_complete (self)
 678  *
 679  *    The transfer of a frame in finished. So do the necessary things
 680  *
 681  *
 682  */
 683 static void w83977af_dma_xmit_complete(struct w83977af_ir *self)
 684 {
 685         int iobase;
 686         __u8 set;
 687
 688         IRDA_DEBUG(4, "%s(%ld)\n", __func__ , jiffies);
 689
 690         IRDA_ASSERT(self != NULL, return;);
 691
 692         iobase = self->io.fir_base;
 693
 694         /* Save current set */
 695         set = inb(iobase+SSR);
 696
 697         /* Disable DMA */
 698         switch_bank(iobase, SET0);
 699         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 700
 701         /* Check for underrrun! */
 702         if (inb(iobase+AUDR) & AUDR_UNDR) {
 703                 IRDA_DEBUG(0, "%s(), Transmit underrun!\n", __func__ );
 704
 705                 self->stats.tx_errors++;
 706                 self->stats.tx_fifo_errors++;
 707
 708                 /* Clear bit, by writing 1 to it */
 709                 outb(AUDR_UNDR, iobase+AUDR);
 710         } else
 711                 self->stats.tx_packets++;
 712
 713
 714         if (self->new_speed) {
 715                 w83977af_change_speed(self, self->new_speed);
 716                 self->new_speed = 0;
 717         }
 718
 719         /* Unlock tx_buff and request another frame */
 720         /* Tell the network layer, that we want more frames */
 721         netif_wake_queue(self->netdev);
 722
 723         /* Restore set */
 724         outb(set, iobase+SSR);
 725 }
 726
 727 /*
 728  * Function w83977af_dma_receive (self)
 729  *
 730  *    Get ready for receiving a frame. The device will initiate a DMA
 731  *    if it starts to receive a frame.
 732  *
 733  */
 734 int w83977af_dma_receive(struct w83977af_ir *self)
 735 {
 736         int iobase;
 737         __u8 set;
 738 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 739         unsigned long flags;
 740         __u8 hcr;
 741 #endif
 742         IRDA_ASSERT(self != NULL, return -1;);
 743
 744         IRDA_DEBUG(4, "%s\n", __func__ );
 745
 746         iobase= self->io.fir_base;
 747
 748         /* Save current set */
 749         set = inb(iobase+SSR);
 750
 751         /* Disable DMA */
 752         switch_bank(iobase, SET0);
 753         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 754
 755         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
 756         switch_bank(iobase, SET2);
 757         outb((inb(iobase+ADCR1) & ~ADCR1_D_CHSW)/*|ADCR1_DMA_F*/|ADCR1_ADV_SL,
 758              iobase+ADCR1);
 759
 760         self->io.direction = IO_RECV;
 761         self->rx_buff.data = self->rx_buff.head;
 762
 763 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 764         spin_lock_irqsave(&self->lock, flags);
 765
 766         disable_dma(self->io.dma);
 767         clear_dma_ff(self->io.dma);
 768         set_dma_mode(self->io.dma, DMA_MODE_READ);
 769         set_dma_addr(self->io.dma, self->rx_buff_dma);
 770         set_dma_count(self->io.dma, self->rx_buff.truesize);
 771 #else
 772         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
 773                        DMA_MODE_READ);
 774 #endif
 775         /*
 776          * Reset Rx FIFO. This will also flush the ST_FIFO, it's very
 777          * important that we don't reset the Tx FIFO since it might not
 778          * be finished transmitting yet
 779          */
 780         switch_bank(iobase, SET0);
 781         outb(UFR_RXTL|UFR_TXTL|UFR_RXF_RST|UFR_EN_FIFO, iobase+UFR);
 782         self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0;
 783
 784         /* Enable DMA */
 785         switch_bank(iobase, SET0);
 786 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 787         hcr = inb(iobase+HCR);
 788         outb(hcr | HCR_EN_DMA, iobase+HCR);
 789         enable_dma(self->io.dma);
 790         spin_unlock_irqrestore(&self->lock, flags);
 791 #else
 792         outb(inb(iobase+HCR) | HCR_EN_DMA, iobase+HCR);
 793 #endif
 794         /* Restore set */
 795         outb(set, iobase+SSR);
 796
 797         return 0;
 798 }
 799
 800 /*
 801  * Function w83977af_receive_complete (self)
 802  *
 803  *    Finished with receiving a frame
 804  *
 805  */
 806 int w83977af_dma_receive_complete(struct w83977af_ir *self)
 807 {
 808         struct sk_buff *skb;
 809         struct st_fifo *st_fifo;
 810         int len;
 811         int iobase;
 812         __u8 set;
 813         __u8 status;
 814
 815         IRDA_DEBUG(4, "%s\n", __func__ );
 816
 817         st_fifo = &self->st_fifo;
 818
 819         iobase = self->io.fir_base;
 820
 821         /* Save current set */
 822         set = inb(iobase+SSR);
 823
 824         iobase = self->io.fir_base;
 825
 826         /* Read status FIFO */
 827         switch_bank(iobase, SET5);
 828         while ((status = inb(iobase+FS_FO)) & FS_FO_FSFDR) {
 829                 st_fifo->entries[st_fifo->tail].status = status;
 830
 831                 st_fifo->entries[st_fifo->tail].len  = inb(iobase+RFLFL);
 832                 st_fifo->entries[st_fifo->tail].len |= inb(iobase+RFLFH) << 8;
 833
 834                 st_fifo->tail++;
 835                 st_fifo->len++;
 836         }
 837
 838         while (st_fifo->len) {
 839                 /* Get first entry */
 840                 status = st_fifo->entries[st_fifo->head].status;
 841                 len    = st_fifo->entries[st_fifo->head].len;
 842                 st_fifo->head++;
 843                 st_fifo->len--;
 844
 845                 /* Check for errors */
 846                 if (status & FS_FO_ERR_MSK) {
 847                         if (status & FS_FO_LST_FR) {
 848                                 /* Add number of lost frames to stats */
 849                                 self->stats.rx_errors += len;
 850                         } else {
 851                                 /* Skip frame */
 852                                 self->stats.rx_errors++;
 853
 854                                 self->rx_buff.data += len;
 855
 856                                 if (status & FS_FO_MX_LEX)
 857                                         self->stats.rx_length_errors++;
 858
 859                                 if (status & FS_FO_PHY_ERR)
 860                                         self->stats.rx_frame_errors++;
 861
 862                                 if (status & FS_FO_CRC_ERR)
 863                                         self->stats.rx_crc_errors++;
 864                         }
 865                         /* The errors below can be reported in both cases */
 866                         if (status & FS_FO_RX_OV)
 867                                 self->stats.rx_fifo_errors++;
 868
 869                         if (status & FS_FO_FSF_OV)
 870                                 self->stats.rx_fifo_errors++;
 871
 872                 } else {
 873                         /* Check if we have transferred all data to memory */
 874                         switch_bank(iobase, SET0);
 875                         if (inb(iobase+USR) & USR_RDR) {
 876 #ifdef CONFIG_USE_INTERNAL_TIMER
 877                                 /* Put this entry back in fifo */
 878                                 st_fifo->head--;
 879                                 st_fifo->len++;
 880                                 st_fifo->entries[st_fifo->head].status = status;
 881                                 st_fifo->entries[st_fifo->head].len = len;
 882
 883                                 /* Restore set register */
 884                                 outb(set, iobase+SSR);
 885
 886                                 return FALSE;   /* I'll be back! */
 887 #else
 888                                 udelay(80); /* Should be enough!? */
 889 #endif
 890                         }
 891
 892                         skb = dev_alloc_skb(len+1);
 893                         if (skb == NULL)  {
 894                                 printk(KERN_INFO
 895                                        "%s(), memory squeeze, dropping frame.\n", __func__);
 896                                 /* Restore set register */
 897                                 outb(set, iobase+SSR);
 898
 899                                 return FALSE;
 900                         }
 901
 902                         /*  Align to 20 bytes */
 903                         skb_reserve(skb, 1);
 904
 905                         /* Copy frame without CRC */
 906                         if (self->io.speed < 4000000) {
 907                                 skb_put(skb, len-2);
 908                                 skb_copy_to_linear_data(skb,
 909                                                         self->rx_buff.data,
 910                                                         len - 2);
 911                         } else {
 912                                 skb_put(skb, len-4);
 913                                 skb_copy_to_linear_data(skb,
 914                                                         self->rx_buff.data,
 915                                                         len - 4);
 916                         }
 917
 918                         /* Move to next frame */
 919                         self->rx_buff.data += len;
 920                         self->stats.rx_packets++;
 921
 922                         skb->dev = self->netdev;
 923                         skb_reset_mac_header(skb);
 924                         skb->protocol = htons(ETH_P_IRDA);
 925                         netif_rx(skb);
 926                         self->netdev->last_rx = jiffies;
 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->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->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 = dev->priv;
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 = (struct w83977af_ir *) dev->priv;
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 = (struct w83977af_ir *) dev->priv;
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 = dev->priv;
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 static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev)
1341 {
1342         struct w83977af_ir *self = (struct w83977af_ir *) dev->priv;
1343
1344         return &self->stats;
1345 }
1346
1347 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
1348 MODULE_DESCRIPTION("Winbond W83977AF IrDA Device Driver");
1349 MODULE_LICENSE("GPL");
1350
1351
1352 module_param(qos_mtt_bits, int, 0);
1353 MODULE_PARM_DESC(qos_mtt_bits, "Mimimum Turn Time");
1354 module_param_array(io, int, NULL, 0);
1355 MODULE_PARM_DESC(io, "Base I/O addresses");
1356 module_param_array(irq, int, NULL, 0);
1357 MODULE_PARM_DESC(irq, "IRQ lines");
1358
1359 /*
1360  * Function init_module (void)
1361  *
1362  *
1363  *
1364  */
1365 module_init(w83977af_init);
1366
1367 /*
1368  * Function cleanup_module (void)
1369  *
1370  *
1371  *
1372  */
1373 module_exit(w83977af_cleanup);