drivers/net/irda/w83977af_ir.c

   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/config.h>
  44 #include <linux/kernel.h>
  45 #include <linux/types.h>
  46 #include <linux/skbuff.h>
  47 #include <linux/netdevice.h>
  48 #include <linux/ioport.h>
  49 #include <linux/delay.h>
  50 #include <linux/slab.h>
  51 #include <linux/init.h>
  52 #include <linux/rtnetlink.h>
  53 #include <linux/dma-mapping.h>
  54
  55 #include <asm/io.h>
  56 #include <asm/dma.h>
  57 #include <asm/byteorder.h>
  58
  59 #include <net/irda/irda.h>
  60 #include <net/irda/wrapper.h>
  61 #include <net/irda/irda_device.h>
  62 #include "w83977af.h"
  63 #include "w83977af_ir.h"
  64
  65 #ifdef  CONFIG_ARCH_NETWINDER            /* Adjust to NetWinder differences */
  66 #undef  CONFIG_NETWINDER_TX_DMA_PROBLEMS /* Not needed */
  67 #define CONFIG_NETWINDER_RX_DMA_PROBLEMS /* Must have this one! */
  68 #endif
  69 #undef  CONFIG_USE_INTERNAL_TIMER  /* Just cannot make that timer work */
  70 #define CONFIG_USE_W977_PNP        /* Currently needed */
  71 #define PIO_MAX_SPEED       115200
  72
  73 static char *driver_name = "w83977af_ir";
  74 static int  qos_mtt_bits = 0x07;   /* 1 ms or more */
  75
  76 #define CHIP_IO_EXTENT 8
  77
  78 static unsigned int io[] = { 0x180, ~0, ~0, ~0 };
  79 #ifdef CONFIG_ARCH_NETWINDER             /* Adjust to NetWinder differences */
  80 static unsigned int irq[] = { 6, 0, 0, 0 };
  81 #else
  82 static unsigned int irq[] = { 11, 0, 0, 0 };
  83 #endif
  84 static unsigned int dma[] = { 1, 0, 0, 0 };
  85 static unsigned int efbase[] = { W977_EFIO_BASE, W977_EFIO2_BASE };
  86 static unsigned int efio = W977_EFIO_BASE;
  87
  88 static struct w83977af_ir *dev_self[] = { NULL, NULL, NULL, NULL};
  89
  90 /* Some prototypes */
  91 static int  w83977af_open(int i, unsigned int iobase, unsigned int irq,
  92                           unsigned int dma);
  93 static int  w83977af_close(struct w83977af_ir *self);
  94 static int  w83977af_probe(int iobase, int irq, int dma);
  95 static int  w83977af_dma_receive(struct w83977af_ir *self);
  96 static int  w83977af_dma_receive_complete(struct w83977af_ir *self);
  97 static int  w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev);
  98 static int  w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
  99 static void w83977af_dma_write(struct w83977af_ir *self, int iobase);
 100 static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed);
 101 static int  w83977af_is_receiving(struct w83977af_ir *self);
 102
 103 static int  w83977af_net_open(struct net_device *dev);
 104 static int  w83977af_net_close(struct net_device *dev);
 105 static int  w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 106 static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev);
 107
 108 /*
 109  * Function w83977af_init ()
 110  *
 111  *    Initialize chip. Just try to find out how many chips we are dealing with
 112  *    and where they are
 113  */
 114 static int __init w83977af_init(void)
 115 {
 116         int i;
 117
 118         IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
 119
 120         for (i=0; (io[i] < 2000) && (i < 4); i++) {
 121                 if (w83977af_open(i, io[i], irq[i], dma[i]) == 0)
 122                         return 0;
 123         }
 124         return -ENODEV;
 125 }
 126
 127 /*
 128  * Function w83977af_cleanup ()
 129  *
 130  *    Close all configured chips
 131  *
 132  */
 133 static void __exit w83977af_cleanup(void)
 134 {
 135         int i;
 136
 137         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 138
 139         for (i=0; i < 4; i++) {
 140                 if (dev_self[i])
 141                         w83977af_close(dev_self[i]);
 142         }
 143 }
 144
 145 /*
 146  * Function w83977af_open (iobase, irq)
 147  *
 148  *    Open driver instance
 149  *
 150  */
 151 int w83977af_open(int i, unsigned int iobase, unsigned int irq,
 152                   unsigned int dma)
 153 {
 154         struct net_device *dev;
 155         struct w83977af_ir *self;
 156         int err;
 157
 158         IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
 159
 160         /* Lock the port that we need */
 161         if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
 162                 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
 163                       __FUNCTION__ , iobase);
 164                 return -ENODEV;
 165         }
 166
 167         if (w83977af_probe(iobase, irq, dma) == -1) {
 168                 err = -1;
 169                 goto err_out;
 170         }
 171         /*
 172          *  Allocate new instance of the driver
 173          */
 174         dev = alloc_irdadev(sizeof(struct w83977af_ir));
 175         if (dev == NULL) {
 176                 printk( KERN_ERR "IrDA: Can't allocate memory for "
 177                         "IrDA control block!\n");
 178                 err = -ENOMEM;
 179                 goto err_out;
 180         }
 181
 182         self = dev->priv;
 183         spin_lock_init(&self->lock);
 184
 185
 186         /* Initialize IO */
 187         self->io.fir_base   = iobase;
 188         self->io.irq       = irq;
 189         self->io.fir_ext   = CHIP_IO_EXTENT;
 190         self->io.dma       = dma;
 191         self->io.fifo_size = 32;
 192
 193         /* Initialize QoS for this device */
 194         irda_init_max_qos_capabilies(&self->qos);
 195
 196         /* The only value we must override it the baudrate */
 197
 198         /* FIXME: The HP HDLS-1100 does not support 1152000! */
 199         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 200                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
 201
 202         /* The HP HDLS-1100 needs 1 ms according to the specs */
 203         self->qos.min_turn_time.bits = qos_mtt_bits;
 204         irda_qos_bits_to_value(&self->qos);
 205
 206         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 207         self->rx_buff.truesize = 14384;
 208         self->tx_buff.truesize = 4000;
 209
 210         /* Allocate memory if needed */
 211         self->rx_buff.head =
 212                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 213                                    &self->rx_buff_dma, GFP_KERNEL);
 214         if (self->rx_buff.head == NULL) {
 215                 err = -ENOMEM;
 216                 goto err_out1;
 217         }
 218
 219         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 220
 221         self->tx_buff.head =
 222                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 223                                    &self->tx_buff_dma, GFP_KERNEL);
 224         if (self->tx_buff.head == NULL) {
 225                 err = -ENOMEM;
 226                 goto err_out2;
 227         }
 228         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 229
 230         self->rx_buff.in_frame = FALSE;
 231         self->rx_buff.state = OUTSIDE_FRAME;
 232         self->tx_buff.data = self->tx_buff.head;
 233         self->rx_buff.data = self->rx_buff.head;
 234         self->netdev = dev;
 235
 236         /* Keep track of module usage */
 237         SET_MODULE_OWNER(dev);
 238
 239         /* Override the network functions we need to use */
 240         dev->hard_start_xmit = w83977af_hard_xmit;
 241         dev->open            = w83977af_net_open;
 242         dev->stop            = w83977af_net_close;
 243         dev->do_ioctl        = w83977af_net_ioctl;
 244         dev->get_stats       = w83977af_net_get_stats;
 245
 246         err = register_netdev(dev);
 247         if (err) {
 248                 IRDA_ERROR("%s(), register_netdevice() failed!\n", __FUNCTION__);
 249                 goto err_out3;
 250         }
 251         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 252
 253         /* Need to store self somewhere */
 254         dev_self[i] = self;
 255
 256         return 0;
 257 err_out3:
 258         dma_free_coherent(NULL, self->tx_buff.truesize,
 259                           self->tx_buff.head, self->tx_buff_dma);
 260 err_out2:
 261         dma_free_coherent(NULL, self->rx_buff.truesize,
 262                           self->rx_buff.head, self->rx_buff_dma);
 263 err_out1:
 264         free_netdev(dev);
 265 err_out:
 266         release_region(iobase, CHIP_IO_EXTENT);
 267         return err;
 268 }
 269
 270 /*
 271  * Function w83977af_close (self)
 272  *
 273  *    Close driver instance
 274  *
 275  */
 276 static int w83977af_close(struct w83977af_ir *self)
 277 {
 278         int iobase;
 279
 280         IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
 281
 282         iobase = self->io.fir_base;
 283
 284 #ifdef CONFIG_USE_W977_PNP
 285         /* enter PnP configuration mode */
 286         w977_efm_enter(efio);
 287
 288         w977_select_device(W977_DEVICE_IR, efio);
 289
 290         /* Deactivate device */
 291         w977_write_reg(0x30, 0x00, efio);
 292
 293         w977_efm_exit(efio);
 294 #endif /* CONFIG_USE_W977_PNP */
 295
 296         /* Remove netdevice */
 297         unregister_netdev(self->netdev);
 298
 299         /* Release the PORT that this driver is using */
 300         IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n",
 301               __FUNCTION__ , self->io.fir_base);
 302         release_region(self->io.fir_base, self->io.fir_ext);
 303
 304         if (self->tx_buff.head)
 305                 dma_free_coherent(NULL, self->tx_buff.truesize,
 306                                   self->tx_buff.head, self->tx_buff_dma);
 307
 308         if (self->rx_buff.head)
 309                 dma_free_coherent(NULL, self->rx_buff.truesize,
 310                                   self->rx_buff.head, self->rx_buff_dma);
 311
 312         free_netdev(self->netdev);
 313
 314         return 0;
 315 }
 316
 317 int w83977af_probe( int iobase, int irq, int dma)
 318 {
 319         int version;
 320         int i;
 321
 322         for (i=0; i < 2; i++) {
 323                 IRDA_DEBUG( 0, "%s()\n", __FUNCTION__ );
 324 #ifdef CONFIG_USE_W977_PNP
 325                 /* Enter PnP configuration mode */
 326                 w977_efm_enter(efbase[i]);
 327
 328                 w977_select_device(W977_DEVICE_IR, efbase[i]);
 329
 330                 /* Configure PnP port, IRQ, and DMA channel */
 331                 w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]);
 332                 w977_write_reg(0x61, (iobase) & 0xff, efbase[i]);
 333
 334                 w977_write_reg(0x70, irq, efbase[i]);
 335 #ifdef CONFIG_ARCH_NETWINDER
 336                 /* Netwinder uses 1 higher than Linux */
 337                 w977_write_reg(0x74, dma+1, efbase[i]);
 338 #else
 339                 w977_write_reg(0x74, dma, efbase[i]);
 340 #endif /*CONFIG_ARCH_NETWINDER */
 341                 w977_write_reg(0x75, 0x04, efbase[i]);  /* Disable Tx DMA */
 342
 343                 /* Set append hardware CRC, enable IR bank selection */
 344                 w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]);
 345
 346                 /* Activate device */
 347                 w977_write_reg(0x30, 0x01, efbase[i]);
 348
 349                 w977_efm_exit(efbase[i]);
 350 #endif /* CONFIG_USE_W977_PNP */
 351                 /* Disable Advanced mode */
 352                 switch_bank(iobase, SET2);
 353                 outb(iobase+2, 0x00);
 354
 355                 /* Turn on UART (global) interrupts */
 356                 switch_bank(iobase, SET0);
 357                 outb(HCR_EN_IRQ, iobase+HCR);
 358
 359                 /* Switch to advanced mode */
 360                 switch_bank(iobase, SET2);
 361                 outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1);
 362
 363                 /* Set default IR-mode */
 364                 switch_bank(iobase, SET0);
 365                 outb(HCR_SIR, iobase+HCR);
 366
 367                 /* Read the Advanced IR ID */
 368                 switch_bank(iobase, SET3);
 369                 version = inb(iobase+AUID);
 370
 371                 /* Should be 0x1? */
 372                 if (0x10 == (version & 0xf0)) {
 373                         efio = efbase[i];
 374
 375                         /* Set FIFO size to 32 */
 376                         switch_bank(iobase, SET2);
 377                         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 378
 379                         /* Set FIFO threshold to TX17, RX16 */
 380                         switch_bank(iobase, SET0);
 381                         outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST|
 382                              UFR_EN_FIFO,iobase+UFR);
 383
 384                         /* Receiver frame length */
 385                         switch_bank(iobase, SET4);
 386                         outb(2048 & 0xff, iobase+6);
 387                         outb((2048 >> 8) & 0x1f, iobase+7);
 388
 389                         /*
 390                          * Init HP HSDL-1100 transceiver.
 391                          *
 392                          * Set IRX_MSL since we have 2 * receive paths IRRX,
 393                          * and IRRXH. Clear IRSL0D since we want IRSL0 * to
 394                          * be a input pin used for IRRXH
 395                          *
 396                          *   IRRX  pin 37 connected to receiver
 397                          *   IRTX  pin 38 connected to transmitter
 398                          *   FIRRX pin 39 connected to receiver      (IRSL0)
 399                          *   CIRRX pin 40 connected to pin 37
 400                          */
 401                         switch_bank(iobase, SET7);
 402                         outb(0x40, iobase+7);
 403
 404                         IRDA_MESSAGE("W83977AF (IR) driver loaded. "
 405                                      "Version: 0x%02x\n", version);
 406
 407                         return 0;
 408                 } else {
 409                         /* Try next extented function register address */
 410                         IRDA_DEBUG( 0, "%s(), Wrong chip version", __FUNCTION__ );
 411                 }
 412         }
 413         return -1;
 414 }
 415
 416 void w83977af_change_speed(struct w83977af_ir *self, __u32 speed)
 417 {
 418         int ir_mode = HCR_SIR;
 419         int iobase;
 420         __u8 set;
 421
 422         iobase = self->io.fir_base;
 423
 424         /* Update accounting for new speed */
 425         self->io.speed = speed;
 426
 427         /* Save current bank */
 428         set = inb(iobase+SSR);
 429
 430         /* Disable interrupts */
 431         switch_bank(iobase, SET0);
 432         outb(0, iobase+ICR);
 433
 434         /* Select Set 2 */
 435         switch_bank(iobase, SET2);
 436         outb(0x00, iobase+ABHL);
 437
 438         switch (speed) {
 439         case 9600:   outb(0x0c, iobase+ABLL); break;
 440         case 19200:  outb(0x06, iobase+ABLL); break;
 441         case 38400:  outb(0x03, iobase+ABLL); break;
 442         case 57600:  outb(0x02, iobase+ABLL); break;
 443         case 115200: outb(0x01, iobase+ABLL); break;
 444         case 576000:
 445                 ir_mode = HCR_MIR_576;
 446                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__ );
 447                 break;
 448         case 1152000:
 449                 ir_mode = HCR_MIR_1152;
 450                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __FUNCTION__ );
 451                 break;
 452         case 4000000:
 453                 ir_mode = HCR_FIR;
 454                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __FUNCTION__ );
 455                 break;
 456         default:
 457                 ir_mode = HCR_FIR;
 458                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __FUNCTION__ , speed);
 459                 break;
 460         }
 461
 462         /* Set speed mode */
 463         switch_bank(iobase, SET0);
 464         outb(ir_mode, iobase+HCR);
 465
 466         /* set FIFO size to 32 */
 467         switch_bank(iobase, SET2);
 468         outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
 469
 470         /* set FIFO threshold to TX17, RX16 */
 471         switch_bank(iobase, SET0);
 472         outb(0x00, iobase+UFR);        /* Reset */
 473         outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */
 474         outb(0xa7, iobase+UFR);
 475
 476         netif_wake_queue(self->netdev);
 477
 478         /* Enable some interrupts so we can receive frames */
 479         switch_bank(iobase, SET0);
 480         if (speed > PIO_MAX_SPEED) {
 481                 outb(ICR_EFSFI, iobase+ICR);
 482                 w83977af_dma_receive(self);
 483         } else
 484                 outb(ICR_ERBRI, iobase+ICR);
 485
 486         /* Restore SSR */
 487         outb(set, iobase+SSR);
 488 }
 489
 490 /*
 491  * Function w83977af_hard_xmit (skb, dev)
 492  *
 493  *    Sets up a DMA transfer to send the current frame.
 494  *
 495  */
 496 int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 497 {
 498         struct w83977af_ir *self;
 499         __s32 speed;
 500         int iobase;
 501         __u8 set;
 502         int mtt;
 503
 504         self = (struct w83977af_ir *) dev->priv;
 505
 506         iobase = self->io.fir_base;
 507
 508         IRDA_DEBUG(4, "%s(%ld), skb->len=%d\n", __FUNCTION__ , jiffies,
 509                    (int) skb->len);
 510
 511         /* Lock transmit buffer */
 512         netif_stop_queue(dev);
 513
 514         /* Check if we need to change the speed */
 515         speed = irda_get_next_speed(skb);
 516         if ((speed != self->io.speed) && (speed != -1)) {
 517                 /* Check for empty frame */
 518                 if (!skb->len) {
 519                         w83977af_change_speed(self, speed);
 520                         dev->trans_start = jiffies;
 521                         dev_kfree_skb(skb);
 522                         return 0;
 523                 } else
 524                         self->new_speed = speed;
 525         }
 526
 527         /* Save current set */
 528         set = inb(iobase+SSR);
 529
 530         /* Decide if we should use PIO or DMA transfer */
 531         if (self->io.speed > PIO_MAX_SPEED) {
 532                 self->tx_buff.data = self->tx_buff.head;
 533                 memcpy(self->tx_buff.data, skb->data, skb->len);
 534                 self->tx_buff.len = skb->len;
 535
 536                 mtt = irda_get_mtt(skb);
 537 #ifdef CONFIG_USE_INTERNAL_TIMER
 538                 if (mtt > 50) {
 539                         /* Adjust for timer resolution */
 540                         mtt /= 1000+1;
 541
 542                         /* Setup timer */
 543                         switch_bank(iobase, SET4);
 544                         outb(mtt & 0xff, iobase+TMRL);
 545                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
 546
 547                         /* Start timer */
 548                         outb(IR_MSL_EN_TMR, iobase+IR_MSL);
 549                         self->io.direction = IO_XMIT;
 550
 551                         /* Enable timer interrupt */
 552                         switch_bank(iobase, SET0);
 553                         outb(ICR_ETMRI, iobase+ICR);
 554                 } else {
 555 #endif
 556                         IRDA_DEBUG(4, "%s(%ld), mtt=%d\n", __FUNCTION__ , jiffies, mtt);
 557                         if (mtt)
 558                                 udelay(mtt);
 559
 560                         /* Enable DMA interrupt */
 561                         switch_bank(iobase, SET0);
 562                         outb(ICR_EDMAI, iobase+ICR);
 563                         w83977af_dma_write(self, iobase);
 564 #ifdef CONFIG_USE_INTERNAL_TIMER
 565                 }
 566 #endif
 567         } else {
 568                 self->tx_buff.data = self->tx_buff.head;
 569                 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
 570                                                    self->tx_buff.truesize);
 571
 572                 /* Add interrupt on tx low level (will fire immediately) */
 573                 switch_bank(iobase, SET0);
 574                 outb(ICR_ETXTHI, iobase+ICR);
 575         }
 576         dev->trans_start = jiffies;
 577         dev_kfree_skb(skb);
 578
 579         /* Restore set register */
 580         outb(set, iobase+SSR);
 581
 582         return 0;
 583 }
 584
 585 /*
 586  * Function w83977af_dma_write (self, iobase)
 587  *
 588  *    Send frame using DMA
 589  *
 590  */
 591 static void w83977af_dma_write(struct w83977af_ir *self, int iobase)
 592 {
 593         __u8 set;
 594 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 595         unsigned long flags;
 596         __u8 hcr;
 597 #endif
 598         IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__ , self->tx_buff.len);
 599
 600         /* Save current set */
 601         set = inb(iobase+SSR);
 602
 603         /* Disable DMA */
 604         switch_bank(iobase, SET0);
 605         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 606
 607         /* Choose transmit DMA channel  */
 608         switch_bank(iobase, SET2);
 609         outb(ADCR1_D_CHSW|/*ADCR1_DMA_F|*/ADCR1_ADV_SL, iobase+ADCR1);
 610 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 611         spin_lock_irqsave(&self->lock, flags);
 612
 613         disable_dma(self->io.dma);
 614         clear_dma_ff(self->io.dma);
 615         set_dma_mode(self->io.dma, DMA_MODE_READ);
 616         set_dma_addr(self->io.dma, self->tx_buff_dma);
 617         set_dma_count(self->io.dma, self->tx_buff.len);
 618 #else
 619         irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
 620                        DMA_MODE_WRITE);
 621 #endif
 622         self->io.direction = IO_XMIT;
 623
 624         /* Enable DMA */
 625         switch_bank(iobase, SET0);
 626 #ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
 627         hcr = inb(iobase+HCR);
 628         outb(hcr | HCR_EN_DMA, iobase+HCR);
 629         enable_dma(self->io.dma);
 630         spin_unlock_irqrestore(&self->lock, flags);
 631 #else
 632         outb(inb(iobase+HCR) | HCR_EN_DMA | HCR_TX_WT, iobase+HCR);
 633 #endif
 634
 635         /* Restore set register */
 636         outb(set, iobase+SSR);
 637 }
 638
 639 /*
 640  * Function w83977af_pio_write (iobase, buf, len, fifo_size)
 641  *
 642  *
 643  *
 644  */
 645 static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
 646 {
 647         int actual = 0;
 648         __u8 set;
 649
 650         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 651
 652         /* Save current bank */
 653         set = inb(iobase+SSR);
 654
 655         switch_bank(iobase, SET0);
 656         if (!(inb_p(iobase+USR) & USR_TSRE)) {
 657                 IRDA_DEBUG(4,
 658                            "%s(), warning, FIFO not empty yet!\n", __FUNCTION__  );
 659
 660                 fifo_size -= 17;
 661                 IRDA_DEBUG(4, "%s(), %d bytes left in tx fifo\n",
 662                            __FUNCTION__ , fifo_size);
 663         }
 664
 665         /* Fill FIFO with current frame */
 666         while ((fifo_size-- > 0) && (actual < len)) {
 667                 /* Transmit next byte */
 668                 outb(buf[actual++], iobase+TBR);
 669         }
 670
 671         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
 672                    __FUNCTION__ , fifo_size, actual, len);
 673
 674         /* Restore bank */
 675         outb(set, iobase+SSR);
 676
 677         return actual;
 678 }
 679
 680 /*
 681  * Function w83977af_dma_xmit_complete (self)
 682  *
 683  *    The transfer of a frame in finished. So do the necessary things
 684  *
 685  *
 686  */
 687 static void w83977af_dma_xmit_complete(struct w83977af_ir *self)
 688 {
 689         int iobase;
 690         __u8 set;
 691
 692         IRDA_DEBUG(4, "%s(%ld)\n", __FUNCTION__ , jiffies);
 693
 694         IRDA_ASSERT(self != NULL, return;);
 695
 696         iobase = self->io.fir_base;
 697
 698         /* Save current set */
 699         set = inb(iobase+SSR);
 700
 701         /* Disable DMA */
 702         switch_bank(iobase, SET0);
 703         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 704
 705         /* Check for underrrun! */
 706         if (inb(iobase+AUDR) & AUDR_UNDR) {
 707                 IRDA_DEBUG(0, "%s(), Transmit underrun!\n", __FUNCTION__ );
 708
 709                 self->stats.tx_errors++;
 710                 self->stats.tx_fifo_errors++;
 711
 712                 /* Clear bit, by writing 1 to it */
 713                 outb(AUDR_UNDR, iobase+AUDR);
 714         } else
 715                 self->stats.tx_packets++;
 716
 717
 718         if (self->new_speed) {
 719                 w83977af_change_speed(self, self->new_speed);
 720                 self->new_speed = 0;
 721         }
 722
 723         /* Unlock tx_buff and request another frame */
 724         /* Tell the network layer, that we want more frames */
 725         netif_wake_queue(self->netdev);
 726
 727         /* Restore set */
 728         outb(set, iobase+SSR);
 729 }
 730
 731 /*
 732  * Function w83977af_dma_receive (self)
 733  *
 734  *    Get ready for receiving a frame. The device will initiate a DMA
 735  *    if it starts to receive a frame.
 736  *
 737  */
 738 int w83977af_dma_receive(struct w83977af_ir *self)
 739 {
 740         int iobase;
 741         __u8 set;
 742 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 743         unsigned long flags;
 744         __u8 hcr;
 745 #endif
 746         IRDA_ASSERT(self != NULL, return -1;);
 747
 748         IRDA_DEBUG(4, "%s\n", __FUNCTION__ );
 749
 750         iobase= self->io.fir_base;
 751
 752         /* Save current set */
 753         set = inb(iobase+SSR);
 754
 755         /* Disable DMA */
 756         switch_bank(iobase, SET0);
 757         outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
 758
 759         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
 760         switch_bank(iobase, SET2);
 761         outb((inb(iobase+ADCR1) & ~ADCR1_D_CHSW)/*|ADCR1_DMA_F*/|ADCR1_ADV_SL,
 762              iobase+ADCR1);
 763
 764         self->io.direction = IO_RECV;
 765         self->rx_buff.data = self->rx_buff.head;
 766
 767 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 768         spin_lock_irqsave(&self->lock, flags);
 769
 770         disable_dma(self->io.dma);
 771         clear_dma_ff(self->io.dma);
 772         set_dma_mode(self->io.dma, DMA_MODE_READ);
 773         set_dma_addr(self->io.dma, self->rx_buff_dma);
 774         set_dma_count(self->io.dma, self->rx_buff.truesize);
 775 #else
 776         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
 777                        DMA_MODE_READ);
 778 #endif
 779         /*
 780          * Reset Rx FIFO. This will also flush the ST_FIFO, it's very
 781          * important that we don't reset the Tx FIFO since it might not
 782          * be finished transmitting yet
 783          */
 784         switch_bank(iobase, SET0);
 785         outb(UFR_RXTL|UFR_TXTL|UFR_RXF_RST|UFR_EN_FIFO, iobase+UFR);
 786         self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0;
 787
 788         /* Enable DMA */
 789         switch_bank(iobase, SET0);
 790 #ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
 791         hcr = inb(iobase+HCR);
 792         outb(hcr | HCR_EN_DMA, iobase+HCR);
 793         enable_dma(self->io.dma);
 794         spin_unlock_irqrestore(&self->lock, flags);
 795 #else
 796         outb(inb(iobase+HCR) | HCR_EN_DMA, iobase+HCR);
 797 #endif
 798         /* Restore set */
 799         outb(set, iobase+SSR);
 800
 801         return 0;
 802 }
 803
 804 /*
 805  * Function w83977af_receive_complete (self)
 806  *
 807  *    Finished with receiving a frame
 808  *
 809  */
 810 int w83977af_dma_receive_complete(struct w83977af_ir *self)
 811 {
 812         struct sk_buff *skb;
 813         struct st_fifo *st_fifo;
 814         int len;
 815         int iobase;
 816         __u8 set;
 817         __u8 status;
 818
 819         IRDA_DEBUG(4, "%s\n", __FUNCTION__ );
 820
 821         st_fifo = &self->st_fifo;
 822
 823         iobase = self->io.fir_base;
 824
 825         /* Save current set */
 826         set = inb(iobase+SSR);
 827
 828         iobase = self->io.fir_base;
 829
 830         /* Read status FIFO */
 831         switch_bank(iobase, SET5);
 832         while ((status = inb(iobase+FS_FO)) & FS_FO_FSFDR) {
 833                 st_fifo->entries[st_fifo->tail].status = status;
 834
 835                 st_fifo->entries[st_fifo->tail].len  = inb(iobase+RFLFL);
 836                 st_fifo->entries[st_fifo->tail].len |= inb(iobase+RFLFH) << 8;
 837
 838                 st_fifo->tail++;
 839                 st_fifo->len++;
 840         }
 841
 842         while (st_fifo->len) {
 843                 /* Get first entry */
 844                 status = st_fifo->entries[st_fifo->head].status;
 845                 len    = st_fifo->entries[st_fifo->head].len;
 846                 st_fifo->head++;
 847                 st_fifo->len--;
 848
 849                 /* Check for errors */
 850                 if (status & FS_FO_ERR_MSK) {
 851                         if (status & FS_FO_LST_FR) {
 852                                 /* Add number of lost frames to stats */
 853                                 self->stats.rx_errors += len;
 854                         } else {
 855                                 /* Skip frame */
 856                                 self->stats.rx_errors++;
 857
 858                                 self->rx_buff.data += len;
 859
 860                                 if (status & FS_FO_MX_LEX)
 861                                         self->stats.rx_length_errors++;
 862
 863                                 if (status & FS_FO_PHY_ERR)
 864                                         self->stats.rx_frame_errors++;
 865
 866                                 if (status & FS_FO_CRC_ERR)
 867                                         self->stats.rx_crc_errors++;
 868                         }
 869                         /* The errors below can be reported in both cases */
 870                         if (status & FS_FO_RX_OV)
 871                                 self->stats.rx_fifo_errors++;
 872
 873                         if (status & FS_FO_FSF_OV)
 874                                 self->stats.rx_fifo_errors++;
 875
 876                 } else {
 877                         /* Check if we have transferred all data to memory */
 878                         switch_bank(iobase, SET0);
 879                         if (inb(iobase+USR) & USR_RDR) {
 880 #ifdef CONFIG_USE_INTERNAL_TIMER
 881                                 /* Put this entry back in fifo */
 882                                 st_fifo->head--;
 883                                 st_fifo->len++;
 884                                 st_fifo->entries[st_fifo->head].status = status;
 885                                 st_fifo->entries[st_fifo->head].len = len;
 886
 887                                 /* Restore set register */
 888                                 outb(set, iobase+SSR);
 889
 890                                 return FALSE;   /* I'll be back! */
 891 #else
 892                                 udelay(80); /* Should be enough!? */
 893 #endif
 894                         }
 895
 896                         skb = dev_alloc_skb(len+1);
 897                         if (skb == NULL)  {
 898                                 printk(KERN_INFO
 899                                        "%s(), memory squeeze, dropping frame.\n", __FUNCTION__);
 900                                 /* Restore set register */
 901                                 outb(set, iobase+SSR);
 902
 903                                 return FALSE;
 904                         }
 905
 906                         /*  Align to 20 bytes */
 907                         skb_reserve(skb, 1);
 908
 909                         /* Copy frame without CRC */
 910                         if (self->io.speed < 4000000) {
 911                                 skb_put(skb, len-2);
 912                                 memcpy(skb->data, self->rx_buff.data, len-2);
 913                         } else {
 914                                 skb_put(skb, len-4);
 915                                 memcpy(skb->data, self->rx_buff.data, 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->mac.raw  = skb->data;
 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", __FUNCTION__ );
 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", __FUNCTION__ , 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", __FUNCTION__ );
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                                         struct pt_regs *regs)
1117 {
1118         struct net_device *dev = (struct net_device *) dev_id;
1119         struct w83977af_ir *self;
1120         __u8 set, icr, isr;
1121         int iobase;
1122
1123         if (!dev) {
1124                 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1125                         driver_name, irq);
1126                 return IRQ_NONE;
1127         }
1128         self = (struct w83977af_ir *) dev->priv;
1129
1130         iobase = self->io.fir_base;
1131
1132         /* Save current bank */
1133         set = inb(iobase+SSR);
1134         switch_bank(iobase, SET0);
1135
1136         icr = inb(iobase+ICR);
1137         isr = inb(iobase+ISR) & icr; /* Mask out the interesting ones */
1138
1139         outb(0, iobase+ICR); /* Disable interrupts */
1140
1141         if (isr) {
1142                 /* Dispatch interrupt handler for the current speed */
1143                 if (self->io.speed > PIO_MAX_SPEED )
1144                         icr = w83977af_fir_interrupt(self, isr);
1145                 else
1146                         icr = w83977af_sir_interrupt(self, isr);
1147         }
1148
1149         outb(icr, iobase+ICR);    /* Restore (new) interrupts */
1150         outb(set, iobase+SSR);    /* Restore bank register */
1151         return IRQ_RETVAL(isr);
1152 }
1153
1154 /*
1155  * Function w83977af_is_receiving (self)
1156  *
1157  *    Return TRUE is we are currently receiving a frame
1158  *
1159  */
1160 static int w83977af_is_receiving(struct w83977af_ir *self)
1161 {
1162         int status = FALSE;
1163         int iobase;
1164         __u8 set;
1165
1166         IRDA_ASSERT(self != NULL, return FALSE;);
1167
1168         if (self->io.speed > 115200) {
1169                 iobase = self->io.fir_base;
1170
1171                 /* Check if rx FIFO is not empty */
1172                 set = inb(iobase+SSR);
1173                 switch_bank(iobase, SET2);
1174                 if ((inb(iobase+RXFDTH) & 0x3f) != 0) {
1175                         /* We are receiving something */
1176                         status =  TRUE;
1177                 }
1178                 outb(set, iobase+SSR);
1179         } else
1180                 status = (self->rx_buff.state != OUTSIDE_FRAME);
1181
1182         return status;
1183 }
1184
1185 /*
1186  * Function w83977af_net_open (dev)
1187  *
1188  *    Start the device
1189  *
1190  */
1191 static int w83977af_net_open(struct net_device *dev)
1192 {
1193         struct w83977af_ir *self;
1194         int iobase;
1195         char hwname[32];
1196         __u8 set;
1197
1198         IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
1199
1200         IRDA_ASSERT(dev != NULL, return -1;);
1201         self = (struct w83977af_ir *) dev->priv;
1202
1203         IRDA_ASSERT(self != NULL, return 0;);
1204
1205         iobase = self->io.fir_base;
1206
1207         if (request_irq(self->io.irq, w83977af_interrupt, 0, dev->name,
1208                         (void *) dev)) {
1209                 return -EAGAIN;
1210         }
1211         /*
1212          * Always allocate the DMA channel after the IRQ,
1213          * and clean up on failure.
1214          */
1215         if (request_dma(self->io.dma, dev->name)) {
1216                 free_irq(self->io.irq, self);
1217                 return -EAGAIN;
1218         }
1219
1220         /* Save current set */
1221         set = inb(iobase+SSR);
1222
1223         /* Enable some interrupts so we can receive frames again */
1224         switch_bank(iobase, SET0);
1225         if (self->io.speed > 115200) {
1226                 outb(ICR_EFSFI, iobase+ICR);
1227                 w83977af_dma_receive(self);
1228         } else
1229                 outb(ICR_ERBRI, iobase+ICR);
1230
1231         /* Restore bank register */
1232         outb(set, iobase+SSR);
1233
1234         /* Ready to play! */
1235         netif_start_queue(dev);
1236
1237         /* Give self a hardware name */
1238         sprintf(hwname, "w83977af @ 0x%03x", self->io.fir_base);
1239
1240         /*
1241          * Open new IrLAP layer instance, now that everything should be
1242          * initialized properly
1243          */
1244         self->irlap = irlap_open(dev, &self->qos, hwname);
1245
1246         return 0;
1247 }
1248
1249 /*
1250  * Function w83977af_net_close (dev)
1251  *
1252  *    Stop the device
1253  *
1254  */
1255 static int w83977af_net_close(struct net_device *dev)
1256 {
1257         struct w83977af_ir *self;
1258         int iobase;
1259         __u8 set;
1260
1261         IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
1262
1263         IRDA_ASSERT(dev != NULL, return -1;);
1264
1265         self = (struct w83977af_ir *) dev->priv;
1266
1267         IRDA_ASSERT(self != NULL, return 0;);
1268
1269         iobase = self->io.fir_base;
1270
1271         /* Stop device */
1272         netif_stop_queue(dev);
1273
1274         /* Stop and remove instance of IrLAP */
1275         if (self->irlap)
1276                 irlap_close(self->irlap);
1277         self->irlap = NULL;
1278
1279         disable_dma(self->io.dma);
1280
1281         /* Save current set */
1282         set = inb(iobase+SSR);
1283
1284         /* Disable interrupts */
1285         switch_bank(iobase, SET0);
1286         outb(0, iobase+ICR);
1287
1288         free_irq(self->io.irq, dev);
1289         free_dma(self->io.dma);
1290
1291         /* Restore bank register */
1292         outb(set, iobase+SSR);
1293
1294         return 0;
1295 }
1296
1297 /*
1298  * Function w83977af_net_ioctl (dev, rq, cmd)
1299  *
1300  *    Process IOCTL commands for this device
1301  *
1302  */
1303 static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1304 {
1305         struct if_irda_req *irq = (struct if_irda_req *) rq;
1306         struct w83977af_ir *self;
1307         unsigned long flags;
1308         int ret = 0;
1309
1310         IRDA_ASSERT(dev != NULL, return -1;);
1311
1312         self = dev->priv;
1313
1314         IRDA_ASSERT(self != NULL, return -1;);
1315
1316         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
1317
1318         spin_lock_irqsave(&self->lock, flags);
1319
1320         switch (cmd) {
1321         case SIOCSBANDWIDTH: /* Set bandwidth */
1322                 if (!capable(CAP_NET_ADMIN)) {
1323                         ret = -EPERM;
1324                         goto out;
1325                 }
1326                 w83977af_change_speed(self, irq->ifr_baudrate);
1327                 break;
1328         case SIOCSMEDIABUSY: /* Set media busy */
1329                 if (!capable(CAP_NET_ADMIN)) {
1330                         ret = -EPERM;
1331                         goto out;
1332                 }
1333                 irda_device_set_media_busy(self->netdev, TRUE);
1334                 break;
1335         case SIOCGRECEIVING: /* Check if we are receiving right now */
1336                 irq->ifr_receiving = w83977af_is_receiving(self);
1337                 break;
1338         default:
1339                 ret = -EOPNOTSUPP;
1340         }
1341 out:
1342         spin_unlock_irqrestore(&self->lock, flags);
1343         return ret;
1344 }
1345
1346 static struct net_device_stats *w83977af_net_get_stats(struct net_device *dev)
1347 {
1348         struct w83977af_ir *self = (struct w83977af_ir *) dev->priv;
1349
1350         return &self->stats;
1351 }
1352
1353 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
1354 MODULE_DESCRIPTION("Winbond W83977AF IrDA Device Driver");
1355 MODULE_LICENSE("GPL");
1356
1357
1358 module_param(qos_mtt_bits, int, 0);
1359 MODULE_PARM_DESC(qos_mtt_bits, "Mimimum Turn Time");
1360 module_param_array(io, int, NULL, 0);
1361 MODULE_PARM_DESC(io, "Base I/O addresses");
1362 module_param_array(irq, int, NULL, 0);
1363 MODULE_PARM_DESC(irq, "IRQ lines");
1364
1365 /*
1366  * Function init_module (void)
1367  *
1368  *
1369  *
1370  */
1371 module_init(w83977af_init);
1372
1373 /*
1374  * Function cleanup_module (void)
1375  *
1376  *
1377  *
1378  */
1379 module_exit(w83977af_cleanup);