git.oblomov.eu Git - linux-2.6/blob - drivers/net/irda/nsc-ircc.c

   1 /*********************************************************************
   2  *
   3  * Filename:      nsc-ircc.c
   4  * Version:       1.0
   5  * Description:   Driver for the NSC PC'108 and PC'338 IrDA chipsets
   6  * Status:        Stable.
   7  * Author:        Dag Brattli <dagb@cs.uit.no>
   8  * Created at:    Sat Nov  7 21:43:15 1998
   9  * Modified at:   Wed Mar  1 11:29:34 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 Lichen Wang, <lwang@actisys.com>
  14  *     Copyright (c) 1998 Actisys Corp., www.actisys.com
  15  *     All Rights Reserved
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2 of
  20  *     the License, or (at your option) any later version.
  21  *
  22  *     Neither Dag Brattli nor University of Tromsø admit liability nor
  23  *     provide warranty for any of this software. This material is
  24  *     provided "AS-IS" and at no charge.
  25  *
  26  *     Notice that all functions that needs to access the chip in _any_
  27  *     way, must save BSR register on entry, and restore it on exit.
  28  *     It is _very_ important to follow this policy!
  29  *
  30  *         __u8 bank;
  31  *
  32  *         bank = inb(iobase+BSR);
  33  *
  34  *         do_your_stuff_here();
  35  *
  36  *         outb(bank, iobase+BSR);
  37  *
  38  *    If you find bugs in this file, its very likely that the same bug
  39  *    will also be in w83977af_ir.c since the implementations are quite
  40  *    similar.
  41  *
  42  ********************************************************************/
  43
  44 #include <linux/module.h>
  45
  46 #include <linux/kernel.h>
  47 #include <linux/types.h>
  48 #include <linux/skbuff.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/ioport.h>
  51 #include <linux/delay.h>
  52 #include <linux/slab.h>
  53 #include <linux/init.h>
  54 #include <linux/rtnetlink.h>
  55 #include <linux/dma-mapping.h>
  56
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/byteorder.h>
  60
  61 #include <linux/pm.h>
  62
  63 #include <net/irda/wrapper.h>
  64 #include <net/irda/irda.h>
  65 #include <net/irda/irda_device.h>
  66
  67 #include "nsc-ircc.h"
  68
  69 #define CHIP_IO_EXTENT 8
  70 #define BROKEN_DONGLE_ID
  71
  72 static char *driver_name = "nsc-ircc";
  73
  74 /* Module parameters */
  75 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
  76 static int dongle_id;
  77
  78 /* Use BIOS settions by default, but user may supply module parameters */
  79 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
  80 static unsigned int irq[] = { 0, 0, 0, 0, 0 };
  81 static unsigned int dma[] = { 0, 0, 0, 0, 0 };
  82
  83 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
  84 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
  85 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info);
  86 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
  87 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
  88 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
  89
  90 /* These are the known NSC chips */
  91 static nsc_chip_t chips[] = {
  92 /*  Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */
  93         { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0,
  94           nsc_ircc_probe_108, nsc_ircc_init_108 },
  95         { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8,
  96           nsc_ircc_probe_338, nsc_ircc_init_338 },
  97         /* Contributed by Steffen Pingel - IBM X40 */
  98         { "PC8738x", { 0x164e, 0x4e, 0x0 }, 0x20, 0xf4, 0xff,
  99           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 100         /* Contributed by Jan Frey - IBM A30/A31 */
 101         { "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff,
 102           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 103         { NULL }
 104 };
 105
 106 /* Max 4 instances for now */
 107 static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
 108
 109 static char *dongle_types[] = {
 110         "Differential serial interface",
 111         "Differential serial interface",
 112         "Reserved",
 113         "Reserved",
 114         "Sharp RY5HD01",
 115         "Reserved",
 116         "Single-ended serial interface",
 117         "Consumer-IR only",
 118         "HP HSDL-2300, HP HSDL-3600/HSDL-3610",
 119         "IBM31T1100 or Temic TFDS6000/TFDS6500",
 120         "Reserved",
 121         "Reserved",
 122         "HP HSDL-1100/HSDL-2100",
 123         "HP HSDL-1100/HSDL-2100",
 124         "Supports SIR Mode only",
 125         "No dongle connected",
 126 };
 127
 128 /* Some prototypes */
 129 static int  nsc_ircc_open(int i, chipio_t *info);
 130 static int  nsc_ircc_close(struct nsc_ircc_cb *self);
 131 static int  nsc_ircc_setup(chipio_t *info);
 132 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
 133 static int  nsc_ircc_dma_receive(struct nsc_ircc_cb *self);
 134 static int  nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase);
 135 static int  nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
 136 static int  nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
 137 static int  nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
 138 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase);
 139 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
 140 static int  nsc_ircc_is_receiving(struct nsc_ircc_cb *self);
 141 static int  nsc_ircc_read_dongle_id (int iobase);
 142 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id);
 143
 144 static int  nsc_ircc_net_open(struct net_device *dev);
 145 static int  nsc_ircc_net_close(struct net_device *dev);
 146 static int  nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 147 static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev);
 148 static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 149
 150 /*
 151  * Function nsc_ircc_init ()
 152  *
 153  *    Initialize chip. Just try to find out how many chips we are dealing with
 154  *    and where they are
 155  */
 156 static int __init nsc_ircc_init(void)
 157 {
 158         chipio_t info;
 159         nsc_chip_t *chip;
 160         int ret = -ENODEV;
 161         int cfg_base;
 162         int cfg, id;
 163         int reg;
 164         int i = 0;
 165
 166         /* Probe for all the NSC chipsets we know about */
 167         for (chip=chips; chip->name ; chip++) {
 168                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__,
 169                            chip->name);
 170
 171                 /* Try all config registers for this chip */
 172                 for (cfg=0; cfg<3; cfg++) {
 173                         cfg_base = chip->cfg[cfg];
 174                         if (!cfg_base)
 175                                 continue;
 176
 177                         memset(&info, 0, sizeof(chipio_t));
 178                         info.cfg_base = cfg_base;
 179                         info.fir_base = io[i];
 180                         info.dma = dma[i];
 181                         info.irq = irq[i];
 182
 183                         /* Read index register */
 184                         reg = inb(cfg_base);
 185                         if (reg == 0xff) {
 186                                 IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __FUNCTION__, cfg_base);
 187                                 continue;
 188                         }
 189
 190                         /* Read chip identification register */
 191                         outb(chip->cid_index, cfg_base);
 192                         id = inb(cfg_base+1);
 193                         if ((id & chip->cid_mask) == chip->cid_value) {
 194                                 IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
 195                                            __FUNCTION__, chip->name, id & ~chip->cid_mask);
 196                                 /*
 197                                  * If the user supplies the base address, then
 198                                  * we init the chip, if not we probe the values
 199                                  * set by the BIOS
 200                                  */
 201                                 if (io[i] < 0x2000) {
 202                                         chip->init(chip, &info);
 203                                 } else
 204                                         chip->probe(chip, &info);
 205
 206                                 if (nsc_ircc_open(i, &info) == 0)
 207                                         ret = 0;
 208                                 i++;
 209                         } else {
 210                                 IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __FUNCTION__, id);
 211                         }
 212                 }
 213
 214         }
 215
 216         return ret;
 217 }
 218
 219 /*
 220  * Function nsc_ircc_cleanup ()
 221  *
 222  *    Close all configured chips
 223  *
 224  */
 225 static void __exit nsc_ircc_cleanup(void)
 226 {
 227         int i;
 228
 229         pm_unregister_all(nsc_ircc_pmproc);
 230
 231         for (i=0; i < 4; i++) {
 232                 if (dev_self[i])
 233                         nsc_ircc_close(dev_self[i]);
 234         }
 235 }
 236
 237 /*
 238  * Function nsc_ircc_open (iobase, irq)
 239  *
 240  *    Open driver instance
 241  *
 242  */
 243 static int __init nsc_ircc_open(int i, chipio_t *info)
 244 {
 245         struct net_device *dev;
 246         struct nsc_ircc_cb *self;
 247         struct pm_dev *pmdev;
 248         void *ret;
 249         int err;
 250
 251         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 252
 253         IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
 254                      info->cfg_base);
 255
 256         if ((nsc_ircc_setup(info)) == -1)
 257                 return -1;
 258
 259         IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
 260
 261         dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
 262         if (dev == NULL) {
 263                 IRDA_ERROR("%s(), can't allocate memory for "
 264                            "control block!\n", __FUNCTION__);
 265                 return -ENOMEM;
 266         }
 267
 268         self = dev->priv;
 269         self->netdev = dev;
 270         spin_lock_init(&self->lock);
 271
 272         /* Need to store self somewhere */
 273         dev_self[i] = self;
 274         self->index = i;
 275
 276         /* Initialize IO */
 277         self->io.cfg_base  = info->cfg_base;
 278         self->io.fir_base  = info->fir_base;
 279         self->io.irq       = info->irq;
 280         self->io.fir_ext   = CHIP_IO_EXTENT;
 281         self->io.dma       = info->dma;
 282         self->io.fifo_size = 32;
 283
 284         /* Reserve the ioports that we need */
 285         ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
 286         if (!ret) {
 287                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
 288                              __FUNCTION__, self->io.fir_base);
 289                 err = -ENODEV;
 290                 goto out1;
 291         }
 292
 293         /* Initialize QoS for this device */
 294         irda_init_max_qos_capabilies(&self->qos);
 295
 296         /* The only value we must override it the baudrate */
 297         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 298                 IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
 299
 300         self->qos.min_turn_time.bits = qos_mtt_bits;
 301         irda_qos_bits_to_value(&self->qos);
 302
 303         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 304         self->rx_buff.truesize = 14384;
 305         self->tx_buff.truesize = 14384;
 306
 307         /* Allocate memory if needed */
 308         self->rx_buff.head =
 309                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 310                                    &self->rx_buff_dma, GFP_KERNEL);
 311         if (self->rx_buff.head == NULL) {
 312                 err = -ENOMEM;
 313                 goto out2;
 314
 315         }
 316         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 317
 318         self->tx_buff.head =
 319                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 320                                    &self->tx_buff_dma, GFP_KERNEL);
 321         if (self->tx_buff.head == NULL) {
 322                 err = -ENOMEM;
 323                 goto out3;
 324         }
 325         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 326
 327         self->rx_buff.in_frame = FALSE;
 328         self->rx_buff.state = OUTSIDE_FRAME;
 329         self->tx_buff.data = self->tx_buff.head;
 330         self->rx_buff.data = self->rx_buff.head;
 331
 332         /* Reset Tx queue info */
 333         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
 334         self->tx_fifo.tail = self->tx_buff.head;
 335
 336         /* Override the network functions we need to use */
 337         SET_MODULE_OWNER(dev);
 338         dev->hard_start_xmit = nsc_ircc_hard_xmit_sir;
 339         dev->open            = nsc_ircc_net_open;
 340         dev->stop            = nsc_ircc_net_close;
 341         dev->do_ioctl        = nsc_ircc_net_ioctl;
 342         dev->get_stats       = nsc_ircc_net_get_stats;
 343
 344         err = register_netdev(dev);
 345         if (err) {
 346                 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
 347                 goto out4;
 348         }
 349         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 350
 351         /* Check if user has supplied a valid dongle id or not */
 352         if ((dongle_id <= 0) ||
 353             (dongle_id >= (sizeof(dongle_types) / sizeof(dongle_types[0]))) ) {
 354                 dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
 355
 356                 IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
 357                              dongle_types[dongle_id]);
 358         } else {
 359                 IRDA_MESSAGE("%s, Using dongle: %s\n", driver_name,
 360                              dongle_types[dongle_id]);
 361         }
 362
 363         self->io.dongle_id = dongle_id;
 364         nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id);
 365
 366         pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, nsc_ircc_pmproc);
 367         if (pmdev)
 368                 pmdev->data = self;
 369
 370         return 0;
 371  out4:
 372         dma_free_coherent(NULL, self->tx_buff.truesize,
 373                           self->tx_buff.head, self->tx_buff_dma);
 374  out3:
 375         dma_free_coherent(NULL, self->rx_buff.truesize,
 376                           self->rx_buff.head, self->rx_buff_dma);
 377  out2:
 378         release_region(self->io.fir_base, self->io.fir_ext);
 379  out1:
 380         free_netdev(dev);
 381         dev_self[i] = NULL;
 382         return err;
 383 }
 384
 385 /*
 386  * Function nsc_ircc_close (self)
 387  *
 388  *    Close driver instance
 389  *
 390  */
 391 static int __exit nsc_ircc_close(struct nsc_ircc_cb *self)
 392 {
 393         int iobase;
 394
 395         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 396
 397         IRDA_ASSERT(self != NULL, return -1;);
 398
 399         iobase = self->io.fir_base;
 400
 401         /* Remove netdevice */
 402         unregister_netdev(self->netdev);
 403
 404         /* Release the PORT that this driver is using */
 405         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n",
 406                    __FUNCTION__, self->io.fir_base);
 407         release_region(self->io.fir_base, self->io.fir_ext);
 408
 409         if (self->tx_buff.head)
 410                 dma_free_coherent(NULL, self->tx_buff.truesize,
 411                                   self->tx_buff.head, self->tx_buff_dma);
 412
 413         if (self->rx_buff.head)
 414                 dma_free_coherent(NULL, self->rx_buff.truesize,
 415                                   self->rx_buff.head, self->rx_buff_dma);
 416
 417         dev_self[self->index] = NULL;
 418         free_netdev(self->netdev);
 419
 420         return 0;
 421 }
 422
 423 /*
 424  * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
 425  *
 426  *    Initialize the NSC '108 chip
 427  *
 428  */
 429 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info)
 430 {
 431         int cfg_base = info->cfg_base;
 432         __u8 temp=0;
 433
 434         outb(2, cfg_base);      /* Mode Control Register (MCTL) */
 435         outb(0x00, cfg_base+1); /* Disable device */
 436
 437         /* Base Address and Interrupt Control Register (BAIC) */
 438         outb(CFG_108_BAIC, cfg_base);
 439         switch (info->fir_base) {
 440         case 0x3e8: outb(0x14, cfg_base+1); break;
 441         case 0x2e8: outb(0x15, cfg_base+1); break;
 442         case 0x3f8: outb(0x16, cfg_base+1); break;
 443         case 0x2f8: outb(0x17, cfg_base+1); break;
 444         default: IRDA_ERROR("%s(), invalid base_address", __FUNCTION__);
 445         }
 446
 447         /* Control Signal Routing Register (CSRT) */
 448         switch (info->irq) {
 449         case 3:  temp = 0x01; break;
 450         case 4:  temp = 0x02; break;
 451         case 5:  temp = 0x03; break;
 452         case 7:  temp = 0x04; break;
 453         case 9:  temp = 0x05; break;
 454         case 11: temp = 0x06; break;
 455         case 15: temp = 0x07; break;
 456         default: IRDA_ERROR("%s(), invalid irq", __FUNCTION__);
 457         }
 458         outb(CFG_108_CSRT, cfg_base);
 459
 460         switch (info->dma) {
 461         case 0: outb(0x08+temp, cfg_base+1); break;
 462         case 1: outb(0x10+temp, cfg_base+1); break;
 463         case 3: outb(0x18+temp, cfg_base+1); break;
 464         default: IRDA_ERROR("%s(), invalid dma", __FUNCTION__);
 465         }
 466
 467         outb(CFG_108_MCTL, cfg_base);      /* Mode Control Register (MCTL) */
 468         outb(0x03, cfg_base+1); /* Enable device */
 469
 470         return 0;
 471 }
 472
 473 /*
 474  * Function nsc_ircc_probe_108 (chip, info)
 475  *
 476  *
 477  *
 478  */
 479 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info)
 480 {
 481         int cfg_base = info->cfg_base;
 482         int reg;
 483
 484         /* Read address and interrupt control register (BAIC) */
 485         outb(CFG_108_BAIC, cfg_base);
 486         reg = inb(cfg_base+1);
 487
 488         switch (reg & 0x03) {
 489         case 0:
 490                 info->fir_base = 0x3e8;
 491                 break;
 492         case 1:
 493                 info->fir_base = 0x2e8;
 494                 break;
 495         case 2:
 496                 info->fir_base = 0x3f8;
 497                 break;
 498         case 3:
 499                 info->fir_base = 0x2f8;
 500                 break;
 501         }
 502         info->sir_base = info->fir_base;
 503         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__,
 504                    info->fir_base);
 505
 506         /* Read control signals routing register (CSRT) */
 507         outb(CFG_108_CSRT, cfg_base);
 508         reg = inb(cfg_base+1);
 509
 510         switch (reg & 0x07) {
 511         case 0:
 512                 info->irq = -1;
 513                 break;
 514         case 1:
 515                 info->irq = 3;
 516                 break;
 517         case 2:
 518                 info->irq = 4;
 519                 break;
 520         case 3:
 521                 info->irq = 5;
 522                 break;
 523         case 4:
 524                 info->irq = 7;
 525                 break;
 526         case 5:
 527                 info->irq = 9;
 528                 break;
 529         case 6:
 530                 info->irq = 11;
 531                 break;
 532         case 7:
 533                 info->irq = 15;
 534                 break;
 535         }
 536         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
 537
 538         /* Currently we only read Rx DMA but it will also be used for Tx */
 539         switch ((reg >> 3) & 0x03) {
 540         case 0:
 541                 info->dma = -1;
 542                 break;
 543         case 1:
 544                 info->dma = 0;
 545                 break;
 546         case 2:
 547                 info->dma = 1;
 548                 break;
 549         case 3:
 550                 info->dma = 3;
 551                 break;
 552         }
 553         IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
 554
 555         /* Read mode control register (MCTL) */
 556         outb(CFG_108_MCTL, cfg_base);
 557         reg = inb(cfg_base+1);
 558
 559         info->enabled = reg & 0x01;
 560         info->suspended = !((reg >> 1) & 0x01);
 561
 562         return 0;
 563 }
 564
 565 /*
 566  * Function nsc_ircc_init_338 (chip, info)
 567  *
 568  *    Initialize the NSC '338 chip. Remember that the 87338 needs two
 569  *    consecutive writes to the data registers while CPU interrupts are
 570  *    disabled. The 97338 does not require this, but shouldn't be any
 571  *    harm if we do it anyway.
 572  */
 573 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info)
 574 {
 575         /* No init yet */
 576
 577         return 0;
 578 }
 579
 580 /*
 581  * Function nsc_ircc_probe_338 (chip, info)
 582  *
 583  *
 584  *
 585  */
 586 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info)
 587 {
 588         int cfg_base = info->cfg_base;
 589         int reg, com = 0;
 590         int pnp;
 591
 592         /* Read funtion enable register (FER) */
 593         outb(CFG_338_FER, cfg_base);
 594         reg = inb(cfg_base+1);
 595
 596         info->enabled = (reg >> 2) & 0x01;
 597
 598         /* Check if we are in Legacy or PnP mode */
 599         outb(CFG_338_PNP0, cfg_base);
 600         reg = inb(cfg_base+1);
 601
 602         pnp = (reg >> 3) & 0x01;
 603         if (pnp) {
 604                 IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
 605                 outb(0x46, cfg_base);
 606                 reg = (inb(cfg_base+1) & 0xfe) << 2;
 607
 608                 outb(0x47, cfg_base);
 609                 reg |= ((inb(cfg_base+1) & 0xfc) << 8);
 610
 611                 info->fir_base = reg;
 612         } else {
 613                 /* Read function address register (FAR) */
 614                 outb(CFG_338_FAR, cfg_base);
 615                 reg = inb(cfg_base+1);
 616
 617                 switch ((reg >> 4) & 0x03) {
 618                 case 0:
 619                         info->fir_base = 0x3f8;
 620                         break;
 621                 case 1:
 622                         info->fir_base = 0x2f8;
 623                         break;
 624                 case 2:
 625                         com = 3;
 626                         break;
 627                 case 3:
 628                         com = 4;
 629                         break;
 630                 }
 631
 632                 if (com) {
 633                         switch ((reg >> 6) & 0x03) {
 634                         case 0:
 635                                 if (com == 3)
 636                                         info->fir_base = 0x3e8;
 637                                 else
 638                                         info->fir_base = 0x2e8;
 639                                 break;
 640                         case 1:
 641                                 if (com == 3)
 642                                         info->fir_base = 0x338;
 643                                 else
 644                                         info->fir_base = 0x238;
 645                                 break;
 646                         case 2:
 647                                 if (com == 3)
 648                                         info->fir_base = 0x2e8;
 649                                 else
 650                                         info->fir_base = 0x2e0;
 651                                 break;
 652                         case 3:
 653                                 if (com == 3)
 654                                         info->fir_base = 0x220;
 655                                 else
 656                                         info->fir_base = 0x228;
 657                                 break;
 658                         }
 659                 }
 660         }
 661         info->sir_base = info->fir_base;
 662
 663         /* Read PnP register 1 (PNP1) */
 664         outb(CFG_338_PNP1, cfg_base);
 665         reg = inb(cfg_base+1);
 666
 667         info->irq = reg >> 4;
 668
 669         /* Read PnP register 3 (PNP3) */
 670         outb(CFG_338_PNP3, cfg_base);
 671         reg = inb(cfg_base+1);
 672
 673         info->dma = (reg & 0x07) - 1;
 674
 675         /* Read power and test register (PTR) */
 676         outb(CFG_338_PTR, cfg_base);
 677         reg = inb(cfg_base+1);
 678
 679         info->suspended = reg & 0x01;
 680
 681         return 0;
 682 }
 683
 684
 685 /*
 686  * Function nsc_ircc_init_39x (chip, info)
 687  *
 688  *    Now that we know it's a '39x (see probe below), we need to
 689  *    configure it so we can use it.
 690  *
 691  * The NSC '338 chip is a Super I/O chip with a "bank" architecture,
 692  * the configuration of the different functionality (serial, parallel,
 693  * floppy...) are each in a different bank (Logical Device Number).
 694  * The base address, irq and dma configuration registers are common
 695  * to all functionalities (index 0x30 to 0x7F).
 696  * There is only one configuration register specific to the
 697  * serial port, CFG_39X_SPC.
 698  * JeanII
 699  *
 700  * Note : this code was written by Jan Frey <janfrey@web.de>
 701  */
 702 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info)
 703 {
 704         int cfg_base = info->cfg_base;
 705         int enabled;
 706
 707         /* User is shure about his config... accept it. */
 708         IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): "
 709                    "io=0x%04x, irq=%d, dma=%d\n",
 710                    __FUNCTION__, info->fir_base, info->irq, info->dma);
 711
 712         /* Access bank for SP2 */
 713         outb(CFG_39X_LDN, cfg_base);
 714         outb(0x02, cfg_base+1);
 715
 716         /* Configure SP2 */
 717
 718         /* We want to enable the device if not enabled */
 719         outb(CFG_39X_ACT, cfg_base);
 720         enabled = inb(cfg_base+1) & 0x01;
 721
 722         if (!enabled) {
 723                 /* Enable the device */
 724                 outb(CFG_39X_SIOCF1, cfg_base);
 725                 outb(0x01, cfg_base+1);
 726                 /* May want to update info->enabled. Jean II */
 727         }
 728
 729         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
 730          * power mode (wake up from sleep mode) (bit 1) */
 731         outb(CFG_39X_SPC, cfg_base);
 732         outb(0x82, cfg_base+1);
 733
 734         return 0;
 735 }
 736
 737 /*
 738  * Function nsc_ircc_probe_39x (chip, info)
 739  *
 740  *    Test if we really have a '39x chip at the given address
 741  *
 742  * Note : this code was written by Jan Frey <janfrey@web.de>
 743  */
 744 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info)
 745 {
 746         int cfg_base = info->cfg_base;
 747         int reg1, reg2, irq, irqt, dma1, dma2;
 748         int enabled, susp;
 749
 750         IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n",
 751                    __FUNCTION__, cfg_base);
 752
 753         /* This function should be executed with irq off to avoid
 754          * another driver messing with the Super I/O bank - Jean II */
 755
 756         /* Access bank for SP2 */
 757         outb(CFG_39X_LDN, cfg_base);
 758         outb(0x02, cfg_base+1);
 759
 760         /* Read infos about SP2 ; store in info struct */
 761         outb(CFG_39X_BASEH, cfg_base);
 762         reg1 = inb(cfg_base+1);
 763         outb(CFG_39X_BASEL, cfg_base);
 764         reg2 = inb(cfg_base+1);
 765         info->fir_base = (reg1 << 8) | reg2;
 766
 767         outb(CFG_39X_IRQNUM, cfg_base);
 768         irq = inb(cfg_base+1);
 769         outb(CFG_39X_IRQSEL, cfg_base);
 770         irqt = inb(cfg_base+1);
 771         info->irq = irq;
 772
 773         outb(CFG_39X_DMA0, cfg_base);
 774         dma1 = inb(cfg_base+1);
 775         outb(CFG_39X_DMA1, cfg_base);
 776         dma2 = inb(cfg_base+1);
 777         info->dma = dma1 -1;
 778
 779         outb(CFG_39X_ACT, cfg_base);
 780         info->enabled = enabled = inb(cfg_base+1) & 0x01;
 781
 782         outb(CFG_39X_SPC, cfg_base);
 783         susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1);
 784
 785         IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __FUNCTION__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp);
 786
 787         /* Configure SP2 */
 788
 789         /* We want to enable the device if not enabled */
 790         outb(CFG_39X_ACT, cfg_base);
 791         enabled = inb(cfg_base+1) & 0x01;
 792
 793         if (!enabled) {
 794                 /* Enable the device */
 795                 outb(CFG_39X_SIOCF1, cfg_base);
 796                 outb(0x01, cfg_base+1);
 797                 /* May want to update info->enabled. Jean II */
 798         }
 799
 800         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
 801          * power mode (wake up from sleep mode) (bit 1) */
 802         outb(CFG_39X_SPC, cfg_base);
 803         outb(0x82, cfg_base+1);
 804
 805         return 0;
 806 }
 807
 808 /*
 809  * Function nsc_ircc_setup (info)
 810  *
 811  *    Returns non-negative on success.
 812  *
 813  */
 814 static int nsc_ircc_setup(chipio_t *info)
 815 {
 816         int version;
 817         int iobase = info->fir_base;
 818
 819         /* Read the Module ID */
 820         switch_bank(iobase, BANK3);
 821         version = inb(iobase+MID);
 822
 823         IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n",
 824                    __FUNCTION__, driver_name, version);
 825
 826         /* Should be 0x2? */
 827         if (0x20 != (version & 0xf0)) {
 828                 IRDA_ERROR("%s, Wrong chip version %02x\n",
 829                            driver_name, version);
 830                 return -1;
 831         }
 832
 833         /* Switch to advanced mode */
 834         switch_bank(iobase, BANK2);
 835         outb(ECR1_EXT_SL, iobase+ECR1);
 836         switch_bank(iobase, BANK0);
 837
 838         /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
 839         switch_bank(iobase, BANK0);
 840         outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
 841
 842         outb(0x03, iobase+LCR);         /* 8 bit word length */
 843         outb(MCR_SIR, iobase+MCR);      /* Start at SIR-mode, also clears LSR*/
 844
 845         /* Set FIFO size to 32 */
 846         switch_bank(iobase, BANK2);
 847         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
 848
 849         /* IRCR2: FEND_MD is not set */
 850         switch_bank(iobase, BANK5);
 851         outb(0x02, iobase+4);
 852
 853         /* Make sure that some defaults are OK */
 854         switch_bank(iobase, BANK6);
 855         outb(0x20, iobase+0); /* Set 32 bits FIR CRC */
 856         outb(0x0a, iobase+1); /* Set MIR pulse width */
 857         outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */
 858         outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */
 859
 860         /* Enable receive interrupts */
 861         switch_bank(iobase, BANK0);
 862         outb(IER_RXHDL_IE, iobase+IER);
 863
 864         return 0;
 865 }
 866
 867 /*
 868  * Function nsc_ircc_read_dongle_id (void)
 869  *
 870  * Try to read dongle indentification. This procedure needs to be executed
 871  * once after power-on/reset. It also needs to be used whenever you suspect
 872  * that the user may have plugged/unplugged the IrDA Dongle.
 873  */
 874 static int nsc_ircc_read_dongle_id (int iobase)
 875 {
 876         int dongle_id;
 877         __u8 bank;
 878
 879         bank = inb(iobase+BSR);
 880
 881         /* Select Bank 7 */
 882         switch_bank(iobase, BANK7);
 883
 884         /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
 885         outb(0x00, iobase+7);
 886
 887         /* ID0, 1, and 2 are pulled up/down very slowly */
 888         udelay(50);
 889
 890         /* IRCFG1: read the ID bits */
 891         dongle_id = inb(iobase+4) & 0x0f;
 892
 893 #ifdef BROKEN_DONGLE_ID
 894         if (dongle_id == 0x0a)
 895                 dongle_id = 0x09;
 896 #endif
 897         /* Go back to  bank 0 before returning */
 898         switch_bank(iobase, BANK0);
 899
 900         outb(bank, iobase+BSR);
 901
 902         return dongle_id;
 903 }
 904
 905 /*
 906  * Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
 907  *
 908  *     This function initializes the dongle for the transceiver that is
 909  *     used. This procedure needs to be executed once after
 910  *     power-on/reset. It also needs to be used whenever you suspect that
 911  *     the dongle is changed.
 912  */
 913 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id)
 914 {
 915         int bank;
 916
 917         /* Save current bank */
 918         bank = inb(iobase+BSR);
 919
 920         /* Select Bank 7 */
 921         switch_bank(iobase, BANK7);
 922
 923         /* IRCFG4: set according to dongle_id */
 924         switch (dongle_id) {
 925         case 0x00: /* same as */
 926         case 0x01: /* Differential serial interface */
 927                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
 928                            __FUNCTION__, dongle_types[dongle_id]);
 929                 break;
 930         case 0x02: /* same as */
 931         case 0x03: /* Reserved */
 932                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
 933                            __FUNCTION__, dongle_types[dongle_id]);
 934                 break;
 935         case 0x04: /* Sharp RY5HD01 */
 936                 break;
 937         case 0x05: /* Reserved, but this is what the Thinkpad reports */
 938                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
 939                            __FUNCTION__, dongle_types[dongle_id]);
 940                 break;
 941         case 0x06: /* Single-ended serial interface */
 942                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
 943                            __FUNCTION__, dongle_types[dongle_id]);
 944                 break;
 945         case 0x07: /* Consumer-IR only */
 946                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
 947                            __FUNCTION__, dongle_types[dongle_id]);
 948                 break;
 949         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
 950                 IRDA_DEBUG(0, "%s(), %s\n",
 951                            __FUNCTION__, dongle_types[dongle_id]);
 952                 break;
 953         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
 954                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
 955                 break;
 956         case 0x0A: /* same as */
 957         case 0x0B: /* Reserved */
 958                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
 959                            __FUNCTION__, dongle_types[dongle_id]);
 960                 break;
 961         case 0x0C: /* same as */
 962         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
 963                 /*
 964                  * Set irsl0 as input, irsl[1-2] as output, and separate
 965                  * inputs are used for SIR and MIR/FIR
 966                  */
 967                 outb(0x48, iobase+7);
 968                 break;
 969         case 0x0E: /* Supports SIR Mode only */
 970                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
 971                 break;
 972         case 0x0F: /* No dongle connected */
 973                 IRDA_DEBUG(0, "%s(), %s\n",
 974                            __FUNCTION__, dongle_types[dongle_id]);
 975
 976                 switch_bank(iobase, BANK0);
 977                 outb(0x62, iobase+MCR);
 978                 break;
 979         default:
 980                 IRDA_DEBUG(0, "%s(), invalid dongle_id %#x",
 981                            __FUNCTION__, dongle_id);
 982         }
 983
 984         /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
 985         outb(0x00, iobase+4);
 986
 987         /* Restore bank register */
 988         outb(bank, iobase+BSR);
 989
 990 } /* set_up_dongle_interface */
 991
 992 /*
 993  * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
 994  *
 995  *    Change speed of the attach dongle
 996  *
 997  */
 998 static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
 999 {
1000         __u8 bank;
1001
1002         /* Save current bank */
1003         bank = inb(iobase+BSR);
1004
1005         /* Select Bank 7 */
1006         switch_bank(iobase, BANK7);
1007
1008         /* IRCFG1: set according to dongle_id */
1009         switch (dongle_id) {
1010         case 0x00: /* same as */
1011         case 0x01: /* Differential serial interface */
1012                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1013                            __FUNCTION__, dongle_types[dongle_id]);
1014                 break;
1015         case 0x02: /* same as */
1016         case 0x03: /* Reserved */
1017                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1018                            __FUNCTION__, dongle_types[dongle_id]);
1019                 break;
1020         case 0x04: /* Sharp RY5HD01 */
1021                 break;
1022         case 0x05: /* Reserved */
1023                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1024                            __FUNCTION__, dongle_types[dongle_id]);
1025                 break;
1026         case 0x06: /* Single-ended serial interface */
1027                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1028                            __FUNCTION__, dongle_types[dongle_id]);
1029                 break;
1030         case 0x07: /* Consumer-IR only */
1031                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1032                            __FUNCTION__, dongle_types[dongle_id]);
1033                 break;
1034         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1035                 IRDA_DEBUG(0, "%s(), %s\n",
1036                            __FUNCTION__, dongle_types[dongle_id]);
1037                 outb(0x00, iobase+4);
1038                 if (speed > 115200)
1039                         outb(0x01, iobase+4);
1040                 break;
1041         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1042                 outb(0x01, iobase+4);
1043
1044                 if (speed == 4000000) {
1045                         /* There was a cli() there, but we now are already
1046                          * under spin_lock_irqsave() - JeanII */
1047                         outb(0x81, iobase+4);
1048                         outb(0x80, iobase+4);
1049                 } else
1050                         outb(0x00, iobase+4);
1051                 break;
1052         case 0x0A: /* same as */
1053         case 0x0B: /* Reserved */
1054                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1055                            __FUNCTION__, dongle_types[dongle_id]);
1056                 break;
1057         case 0x0C: /* same as */
1058         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1059                 break;
1060         case 0x0E: /* Supports SIR Mode only */
1061                 break;
1062         case 0x0F: /* No dongle connected */
1063                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1064                            __FUNCTION__, dongle_types[dongle_id]);
1065
1066                 switch_bank(iobase, BANK0);
1067                 outb(0x62, iobase+MCR);
1068                 break;
1069         default:
1070                 IRDA_DEBUG(0, "%s(), invalid data_rate\n", __FUNCTION__);
1071         }
1072         /* Restore bank register */
1073         outb(bank, iobase+BSR);
1074 }
1075
1076 /*
1077  * Function nsc_ircc_change_speed (self, baud)
1078  *
1079  *    Change the speed of the device
1080  *
1081  * This function *must* be called with irq off and spin-lock.
1082  */
1083 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
1084 {
1085         struct net_device *dev = self->netdev;
1086         __u8 mcr = MCR_SIR;
1087         int iobase;
1088         __u8 bank;
1089         __u8 ier;                  /* Interrupt enable register */
1090
1091         IRDA_DEBUG(2, "%s(), speed=%d\n", __FUNCTION__, speed);
1092
1093         IRDA_ASSERT(self != NULL, return 0;);
1094
1095         iobase = self->io.fir_base;
1096
1097         /* Update accounting for new speed */
1098         self->io.speed = speed;
1099
1100         /* Save current bank */
1101         bank = inb(iobase+BSR);
1102
1103         /* Disable interrupts */
1104         switch_bank(iobase, BANK0);
1105         outb(0, iobase+IER);
1106
1107         /* Select Bank 2 */
1108         switch_bank(iobase, BANK2);
1109
1110         outb(0x00, iobase+BGDH);
1111         switch (speed) {
1112         case 9600:   outb(0x0c, iobase+BGDL); break;
1113         case 19200:  outb(0x06, iobase+BGDL); break;
1114         case 38400:  outb(0x03, iobase+BGDL); break;
1115         case 57600:  outb(0x02, iobase+BGDL); break;
1116         case 115200: outb(0x01, iobase+BGDL); break;
1117         case 576000:
1118                 switch_bank(iobase, BANK5);
1119
1120                 /* IRCR2: MDRS is set */
1121                 outb(inb(iobase+4) | 0x04, iobase+4);
1122
1123                 mcr = MCR_MIR;
1124                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
1125                 break;
1126         case 1152000:
1127                 mcr = MCR_MIR;
1128                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __FUNCTION__);
1129                 break;
1130         case 4000000:
1131                 mcr = MCR_FIR;
1132                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __FUNCTION__);
1133                 break;
1134         default:
1135                 mcr = MCR_FIR;
1136                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n",
1137                            __FUNCTION__, speed);
1138                 break;
1139         }
1140
1141         /* Set appropriate speed mode */
1142         switch_bank(iobase, BANK0);
1143         outb(mcr | MCR_TX_DFR, iobase+MCR);
1144
1145         /* Give some hits to the transceiver */
1146         nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
1147
1148         /* Set FIFO threshold to TX17, RX16 */
1149         switch_bank(iobase, BANK0);
1150         outb(0x00, iobase+FCR);
1151         outb(FCR_FIFO_EN, iobase+FCR);
1152         outb(FCR_RXTH|     /* Set Rx FIFO threshold */
1153              FCR_TXTH|     /* Set Tx FIFO threshold */
1154              FCR_TXSR|     /* Reset Tx FIFO */
1155              FCR_RXSR|     /* Reset Rx FIFO */
1156              FCR_FIFO_EN,  /* Enable FIFOs */
1157              iobase+FCR);
1158
1159         /* Set FIFO size to 32 */
1160         switch_bank(iobase, BANK2);
1161         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1162
1163         /* Enable some interrupts so we can receive frames */
1164         switch_bank(iobase, BANK0);
1165         if (speed > 115200) {
1166                 /* Install FIR xmit handler */
1167                 dev->hard_start_xmit = nsc_ircc_hard_xmit_fir;
1168                 ier = IER_SFIF_IE;
1169                 nsc_ircc_dma_receive(self);
1170         } else {
1171                 /* Install SIR xmit handler */
1172                 dev->hard_start_xmit = nsc_ircc_hard_xmit_sir;
1173                 ier = IER_RXHDL_IE;
1174         }
1175         /* Set our current interrupt mask */
1176         outb(ier, iobase+IER);
1177
1178         /* Restore BSR */
1179         outb(bank, iobase+BSR);
1180
1181         /* Make sure interrupt handlers keep the proper interrupt mask */
1182         return(ier);
1183 }
1184
1185 /*
1186  * Function nsc_ircc_hard_xmit (skb, dev)
1187  *
1188  *    Transmit the frame!
1189  *
1190  */
1191 static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
1192 {
1193         struct nsc_ircc_cb *self;
1194         unsigned long flags;
1195         int iobase;
1196         __s32 speed;
1197         __u8 bank;
1198
1199         self = (struct nsc_ircc_cb *) dev->priv;
1200
1201         IRDA_ASSERT(self != NULL, return 0;);
1202
1203         iobase = self->io.fir_base;
1204
1205         netif_stop_queue(dev);
1206
1207         /* Make sure tests *& speed change are atomic */
1208         spin_lock_irqsave(&self->lock, flags);
1209
1210         /* Check if we need to change the speed */
1211         speed = irda_get_next_speed(skb);
1212         if ((speed != self->io.speed) && (speed != -1)) {
1213                 /* Check for empty frame. */
1214                 if (!skb->len) {
1215                         /* If we just sent a frame, we get called before
1216                          * the last bytes get out (because of the SIR FIFO).
1217                          * If this is the case, let interrupt handler change
1218                          * the speed itself... Jean II */
1219                         if (self->io.direction == IO_RECV) {
1220                                 nsc_ircc_change_speed(self, speed);
1221                                 /* TODO : For SIR->SIR, the next packet
1222                                  * may get corrupted - Jean II */
1223                                 netif_wake_queue(dev);
1224                         } else {
1225                                 self->new_speed = speed;
1226                                 /* Queue will be restarted after speed change
1227                                  * to make sure packets gets through the
1228                                  * proper xmit handler - Jean II */
1229                         }
1230                         dev->trans_start = jiffies;
1231                         spin_unlock_irqrestore(&self->lock, flags);
1232                         dev_kfree_skb(skb);
1233                         return 0;
1234                 } else
1235                         self->new_speed = speed;
1236         }
1237
1238         /* Save current bank */
1239         bank = inb(iobase+BSR);
1240
1241         self->tx_buff.data = self->tx_buff.head;
1242
1243         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1244                                            self->tx_buff.truesize);
1245
1246         self->stats.tx_bytes += self->tx_buff.len;
1247
1248         /* Add interrupt on tx low level (will fire immediately) */
1249         switch_bank(iobase, BANK0);
1250         outb(IER_TXLDL_IE, iobase+IER);
1251
1252         /* Restore bank register */
1253         outb(bank, iobase+BSR);
1254
1255         dev->trans_start = jiffies;
1256         spin_unlock_irqrestore(&self->lock, flags);
1257
1258         dev_kfree_skb(skb);
1259
1260         return 0;
1261 }
1262
1263 static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1264 {
1265         struct nsc_ircc_cb *self;
1266         unsigned long flags;
1267         int iobase;
1268         __s32 speed;
1269         __u8 bank;
1270         int mtt, diff;
1271
1272         self = (struct nsc_ircc_cb *) dev->priv;
1273         iobase = self->io.fir_base;
1274
1275         netif_stop_queue(dev);
1276
1277         /* Make sure tests *& speed change are atomic */
1278         spin_lock_irqsave(&self->lock, flags);
1279
1280         /* Check if we need to change the speed */
1281         speed = irda_get_next_speed(skb);
1282         if ((speed != self->io.speed) && (speed != -1)) {
1283                 /* Check for empty frame. */
1284                 if (!skb->len) {
1285                         /* If we are currently transmitting, defer to
1286                          * interrupt handler. - Jean II */
1287                         if(self->tx_fifo.len == 0) {
1288                                 nsc_ircc_change_speed(self, speed);
1289                                 netif_wake_queue(dev);
1290                         } else {
1291                                 self->new_speed = speed;
1292                                 /* Keep queue stopped :
1293                                  * the speed change operation may change the
1294                                  * xmit handler, and we want to make sure
1295                                  * the next packet get through the proper
1296                                  * Tx path, so block the Tx queue until
1297                                  * the speed change has been done.
1298                                  * Jean II */
1299                         }
1300                         dev->trans_start = jiffies;
1301                         spin_unlock_irqrestore(&self->lock, flags);
1302                         dev_kfree_skb(skb);
1303                         return 0;
1304                 } else {
1305                         /* Change speed after current frame */
1306                         self->new_speed = speed;
1307                 }
1308         }
1309
1310         /* Save current bank */
1311         bank = inb(iobase+BSR);
1312
1313         /* Register and copy this frame to DMA memory */
1314         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1315         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1316         self->tx_fifo.tail += skb->len;
1317
1318         self->stats.tx_bytes += skb->len;
1319
1320         memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
1321                skb->len);
1322
1323         self->tx_fifo.len++;
1324         self->tx_fifo.free++;
1325
1326         /* Start transmit only if there is currently no transmit going on */
1327         if (self->tx_fifo.len == 1) {
1328                 /* Check if we must wait the min turn time or not */
1329                 mtt = irda_get_mtt(skb);
1330                 if (mtt) {
1331                         /* Check how much time we have used already */
1332                         do_gettimeofday(&self->now);
1333                         diff = self->now.tv_usec - self->stamp.tv_usec;
1334                         if (diff < 0)
1335                                 diff += 1000000;
1336
1337                         /* Check if the mtt is larger than the time we have
1338                          * already used by all the protocol processing
1339                          */
1340                         if (mtt > diff) {
1341                                 mtt -= diff;
1342
1343                                 /*
1344                                  * Use timer if delay larger than 125 us, and
1345                                  * use udelay for smaller values which should
1346                                  * be acceptable
1347                                  */
1348                                 if (mtt > 125) {
1349                                         /* Adjust for timer resolution */
1350                                         mtt = mtt / 125;
1351
1352                                         /* Setup timer */
1353                                         switch_bank(iobase, BANK4);
1354                                         outb(mtt & 0xff, iobase+TMRL);
1355                                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
1356
1357                                         /* Start timer */
1358                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1359                                         self->io.direction = IO_XMIT;
1360
1361                                         /* Enable timer interrupt */
1362                                         switch_bank(iobase, BANK0);
1363                                         outb(IER_TMR_IE, iobase+IER);
1364
1365                                         /* Timer will take care of the rest */
1366                                         goto out;
1367                                 } else
1368                                         udelay(mtt);
1369                         }
1370                 }
1371                 /* Enable DMA interrupt */
1372                 switch_bank(iobase, BANK0);
1373                 outb(IER_DMA_IE, iobase+IER);
1374
1375                 /* Transmit frame */
1376                 nsc_ircc_dma_xmit(self, iobase);
1377         }
1378  out:
1379         /* Not busy transmitting anymore if window is not full,
1380          * and if we don't need to change speed */
1381         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0))
1382                 netif_wake_queue(self->netdev);
1383
1384         /* Restore bank register */
1385         outb(bank, iobase+BSR);
1386
1387         dev->trans_start = jiffies;
1388         spin_unlock_irqrestore(&self->lock, flags);
1389         dev_kfree_skb(skb);
1390
1391         return 0;
1392 }
1393
1394 /*
1395  * Function nsc_ircc_dma_xmit (self, iobase)
1396  *
1397  *    Transmit data using DMA
1398  *
1399  */
1400 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase)
1401 {
1402         int bsr;
1403
1404         /* Save current bank */
1405         bsr = inb(iobase+BSR);
1406
1407         /* Disable DMA */
1408         switch_bank(iobase, BANK0);
1409         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1410
1411         self->io.direction = IO_XMIT;
1412
1413         /* Choose transmit DMA channel  */
1414         switch_bank(iobase, BANK2);
1415         outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1416
1417         irda_setup_dma(self->io.dma,
1418                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1419                         self->tx_buff.head) + self->tx_buff_dma,
1420                        self->tx_fifo.queue[self->tx_fifo.ptr].len,
1421                        DMA_TX_MODE);
1422
1423         /* Enable DMA and SIR interaction pulse */
1424         switch_bank(iobase, BANK0);
1425         outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR);
1426
1427         /* Restore bank register */
1428         outb(bsr, iobase+BSR);
1429 }
1430
1431 /*
1432  * Function nsc_ircc_pio_xmit (self, iobase)
1433  *
1434  *    Transmit data using PIO. Returns the number of bytes that actually
1435  *    got transferred
1436  *
1437  */
1438 static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
1439 {
1440         int actual = 0;
1441         __u8 bank;
1442
1443         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1444
1445         /* Save current bank */
1446         bank = inb(iobase+BSR);
1447
1448         switch_bank(iobase, BANK0);
1449         if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
1450                 IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n",
1451                            __FUNCTION__);
1452
1453                 /* FIFO may still be filled to the Tx interrupt threshold */
1454                 fifo_size -= 17;
1455         }
1456
1457         /* Fill FIFO with current frame */
1458         while ((fifo_size-- > 0) && (actual < len)) {
1459                 /* Transmit next byte */
1460                 outb(buf[actual++], iobase+TXD);
1461         }
1462
1463         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
1464                    __FUNCTION__, fifo_size, actual, len);
1465
1466         /* Restore bank */
1467         outb(bank, iobase+BSR);
1468
1469         return actual;
1470 }
1471
1472 /*
1473  * Function nsc_ircc_dma_xmit_complete (self)
1474  *
1475  *    The transfer of a frame in finished. This function will only be called
1476  *    by the interrupt handler
1477  *
1478  */
1479 static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self)
1480 {
1481         int iobase;
1482         __u8 bank;
1483         int ret = TRUE;
1484
1485         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1486
1487         iobase = self->io.fir_base;
1488
1489         /* Save current bank */
1490         bank = inb(iobase+BSR);
1491
1492         /* Disable DMA */
1493         switch_bank(iobase, BANK0);
1494         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1495
1496         /* Check for underrrun! */
1497         if (inb(iobase+ASCR) & ASCR_TXUR) {
1498                 self->stats.tx_errors++;
1499                 self->stats.tx_fifo_errors++;
1500
1501                 /* Clear bit, by writing 1 into it */
1502                 outb(ASCR_TXUR, iobase+ASCR);
1503         } else {
1504                 self->stats.tx_packets++;
1505         }
1506
1507         /* Finished with this frame, so prepare for next */
1508         self->tx_fifo.ptr++;
1509         self->tx_fifo.len--;
1510
1511         /* Any frames to be sent back-to-back? */
1512         if (self->tx_fifo.len) {
1513                 nsc_ircc_dma_xmit(self, iobase);
1514
1515                 /* Not finished yet! */
1516                 ret = FALSE;
1517         } else {
1518                 /* Reset Tx FIFO info */
1519                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1520                 self->tx_fifo.tail = self->tx_buff.head;
1521         }
1522
1523         /* Make sure we have room for more frames and
1524          * that we don't need to change speed */
1525         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) {
1526                 /* Not busy transmitting anymore */
1527                 /* Tell the network layer, that we can accept more frames */
1528                 netif_wake_queue(self->netdev);
1529         }
1530
1531         /* Restore bank */
1532         outb(bank, iobase+BSR);
1533
1534         return ret;
1535 }
1536
1537 /*
1538  * Function nsc_ircc_dma_receive (self)
1539  *
1540  *    Get ready for receiving a frame. The device will initiate a DMA
1541  *    if it starts to receive a frame.
1542  *
1543  */
1544 static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self)
1545 {
1546         int iobase;
1547         __u8 bsr;
1548
1549         iobase = self->io.fir_base;
1550
1551         /* Reset Tx FIFO info */
1552         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1553         self->tx_fifo.tail = self->tx_buff.head;
1554
1555         /* Save current bank */
1556         bsr = inb(iobase+BSR);
1557
1558         /* Disable DMA */
1559         switch_bank(iobase, BANK0);
1560         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1561
1562         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
1563         switch_bank(iobase, BANK2);
1564         outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1565
1566         self->io.direction = IO_RECV;
1567         self->rx_buff.data = self->rx_buff.head;
1568
1569         /* Reset Rx FIFO. This will also flush the ST_FIFO */
1570         switch_bank(iobase, BANK0);
1571         outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1572
1573         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1574         self->st_fifo.tail = self->st_fifo.head = 0;
1575
1576         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1577                        DMA_RX_MODE);
1578
1579         /* Enable DMA */
1580         switch_bank(iobase, BANK0);
1581         outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR);
1582
1583         /* Restore bank register */
1584         outb(bsr, iobase+BSR);
1585
1586         return 0;
1587 }
1588
1589 /*
1590  * Function nsc_ircc_dma_receive_complete (self)
1591  *
1592  *    Finished with receiving frames
1593  *
1594  *
1595  */
1596 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase)
1597 {
1598         struct st_fifo *st_fifo;
1599         struct sk_buff *skb;
1600         __u8 status;
1601         __u8 bank;
1602         int len;
1603
1604         st_fifo = &self->st_fifo;
1605
1606         /* Save current bank */
1607         bank = inb(iobase+BSR);
1608
1609         /* Read all entries in status FIFO */
1610         switch_bank(iobase, BANK5);
1611         while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) {
1612                 /* We must empty the status FIFO no matter what */
1613                 len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8);
1614
1615                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1616                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__);
1617                         continue;
1618                 }
1619
1620                 st_fifo->entries[st_fifo->tail].status = status;
1621                 st_fifo->entries[st_fifo->tail].len = len;
1622                 st_fifo->pending_bytes += len;
1623                 st_fifo->tail++;
1624                 st_fifo->len++;
1625         }
1626         /* Try to process all entries in status FIFO */
1627         while (st_fifo->len > 0) {
1628                 /* Get first entry */
1629                 status = st_fifo->entries[st_fifo->head].status;
1630                 len    = st_fifo->entries[st_fifo->head].len;
1631                 st_fifo->pending_bytes -= len;
1632                 st_fifo->head++;
1633                 st_fifo->len--;
1634
1635                 /* Check for errors */
1636                 if (status & FRM_ST_ERR_MSK) {
1637                         if (status & FRM_ST_LOST_FR) {
1638                                 /* Add number of lost frames to stats */
1639                                 self->stats.rx_errors += len;
1640                         } else {
1641                                 /* Skip frame */
1642                                 self->stats.rx_errors++;
1643
1644                                 self->rx_buff.data += len;
1645
1646                                 if (status & FRM_ST_MAX_LEN)
1647                                         self->stats.rx_length_errors++;
1648
1649                                 if (status & FRM_ST_PHY_ERR)
1650                                         self->stats.rx_frame_errors++;
1651
1652                                 if (status & FRM_ST_BAD_CRC)
1653                                         self->stats.rx_crc_errors++;
1654                         }
1655                         /* The errors below can be reported in both cases */
1656                         if (status & FRM_ST_OVR1)
1657                                 self->stats.rx_fifo_errors++;
1658
1659                         if (status & FRM_ST_OVR2)
1660                                 self->stats.rx_fifo_errors++;
1661                 } else {
1662                         /*
1663                          * First we must make sure that the frame we
1664                          * want to deliver is all in main memory. If we
1665                          * cannot tell, then we check if the Rx FIFO is
1666                          * empty. If not then we will have to take a nap
1667                          * and try again later.
1668                          */
1669                         if (st_fifo->pending_bytes < self->io.fifo_size) {
1670                                 switch_bank(iobase, BANK0);
1671                                 if (inb(iobase+LSR) & LSR_RXDA) {
1672                                         /* Put this entry back in fifo */
1673                                         st_fifo->head--;
1674                                         st_fifo->len++;
1675                                         st_fifo->pending_bytes += len;
1676                                         st_fifo->entries[st_fifo->head].status = status;
1677                                         st_fifo->entries[st_fifo->head].len = len;
1678                                         /*
1679                                          * DMA not finished yet, so try again
1680                                          * later, set timer value, resolution
1681                                          * 125 us
1682                                          */
1683                                         switch_bank(iobase, BANK4);
1684                                         outb(0x02, iobase+TMRL); /* x 125 us */
1685                                         outb(0x00, iobase+TMRH);
1686
1687                                         /* Start timer */
1688                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1689
1690                                         /* Restore bank register */
1691                                         outb(bank, iobase+BSR);
1692
1693                                         return FALSE; /* I'll be back! */
1694                                 }
1695                         }
1696
1697                         /*
1698                          * Remember the time we received this frame, so we can
1699                          * reduce the min turn time a bit since we will know
1700                          * how much time we have used for protocol processing
1701                          */
1702                         do_gettimeofday(&self->stamp);
1703
1704                         skb = dev_alloc_skb(len+1);
1705                         if (skb == NULL)  {
1706                                 IRDA_WARNING("%s(), memory squeeze, "
1707                                              "dropping frame.\n",
1708                                              __FUNCTION__);
1709                                 self->stats.rx_dropped++;
1710
1711                                 /* Restore bank register */
1712                                 outb(bank, iobase+BSR);
1713
1714                                 return FALSE;
1715                         }
1716
1717                         /* Make sure IP header gets aligned */
1718                         skb_reserve(skb, 1);
1719
1720                         /* Copy frame without CRC */
1721                         if (self->io.speed < 4000000) {
1722                                 skb_put(skb, len-2);
1723                                 memcpy(skb->data, self->rx_buff.data, len-2);
1724                         } else {
1725                                 skb_put(skb, len-4);
1726                                 memcpy(skb->data, self->rx_buff.data, len-4);
1727                         }
1728
1729                         /* Move to next frame */
1730                         self->rx_buff.data += len;
1731                         self->stats.rx_bytes += len;
1732                         self->stats.rx_packets++;
1733
1734                         skb->dev = self->netdev;
1735                         skb->mac.raw  = skb->data;
1736                         skb->protocol = htons(ETH_P_IRDA);
1737                         netif_rx(skb);
1738                         self->netdev->last_rx = jiffies;
1739                 }
1740         }
1741         /* Restore bank register */
1742         outb(bank, iobase+BSR);
1743
1744         return TRUE;
1745 }
1746
1747 /*
1748  * Function nsc_ircc_pio_receive (self)
1749  *
1750  *    Receive all data in receiver FIFO
1751  *
1752  */
1753 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self)
1754 {
1755         __u8 byte;
1756         int iobase;
1757
1758         iobase = self->io.fir_base;
1759
1760         /*  Receive all characters in Rx FIFO */
1761         do {
1762                 byte = inb(iobase+RXD);
1763                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
1764                                   byte);
1765         } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */
1766 }
1767
1768 /*
1769  * Function nsc_ircc_sir_interrupt (self, eir)
1770  *
1771  *    Handle SIR interrupt
1772  *
1773  */
1774 static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
1775 {
1776         int actual;
1777
1778         /* Check if transmit FIFO is low on data */
1779         if (eir & EIR_TXLDL_EV) {
1780                 /* Write data left in transmit buffer */
1781                 actual = nsc_ircc_pio_write(self->io.fir_base,
1782                                            self->tx_buff.data,
1783                                            self->tx_buff.len,
1784                                            self->io.fifo_size);
1785                 self->tx_buff.data += actual;
1786                 self->tx_buff.len  -= actual;
1787
1788                 self->io.direction = IO_XMIT;
1789
1790                 /* Check if finished */
1791                 if (self->tx_buff.len > 0)
1792                         self->ier = IER_TXLDL_IE;
1793                 else {
1794
1795                         self->stats.tx_packets++;
1796                         netif_wake_queue(self->netdev);
1797                         self->ier = IER_TXEMP_IE;
1798                 }
1799
1800         }
1801         /* Check if transmission has completed */
1802         if (eir & EIR_TXEMP_EV) {
1803                 /* Turn around and get ready to receive some data */
1804                 self->io.direction = IO_RECV;
1805                 self->ier = IER_RXHDL_IE;
1806                 /* Check if we need to change the speed?
1807                  * Need to be after self->io.direction to avoid race with
1808                  * nsc_ircc_hard_xmit_sir() - Jean II */
1809                 if (self->new_speed) {
1810                         IRDA_DEBUG(2, "%s(), Changing speed!\n", __FUNCTION__);
1811                         self->ier = nsc_ircc_change_speed(self,
1812                                                           self->new_speed);
1813                         self->new_speed = 0;
1814                         netif_wake_queue(self->netdev);
1815
1816                         /* Check if we are going to FIR */
1817                         if (self->io.speed > 115200) {
1818                                 /* No need to do anymore SIR stuff */
1819                                 return;
1820                         }
1821                 }
1822         }
1823
1824         /* Rx FIFO threshold or timeout */
1825         if (eir & EIR_RXHDL_EV) {
1826                 nsc_ircc_pio_receive(self);
1827
1828                 /* Keep receiving */
1829                 self->ier = IER_RXHDL_IE;
1830         }
1831 }
1832
1833 /*
1834  * Function nsc_ircc_fir_interrupt (self, eir)
1835  *
1836  *    Handle MIR/FIR interrupt
1837  *
1838  */
1839 static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase,
1840                                    int eir)
1841 {
1842         __u8 bank;
1843
1844         bank = inb(iobase+BSR);
1845
1846         /* Status FIFO event*/
1847         if (eir & EIR_SFIF_EV) {
1848                 /* Check if DMA has finished */
1849                 if (nsc_ircc_dma_receive_complete(self, iobase)) {
1850                         /* Wait for next status FIFO interrupt */
1851                         self->ier = IER_SFIF_IE;
1852                 } else {
1853                         self->ier = IER_SFIF_IE | IER_TMR_IE;
1854                 }
1855         } else if (eir & EIR_TMR_EV) { /* Timer finished */
1856                 /* Disable timer */
1857                 switch_bank(iobase, BANK4);
1858                 outb(0, iobase+IRCR1);
1859
1860                 /* Clear timer event */
1861                 switch_bank(iobase, BANK0);
1862                 outb(ASCR_CTE, iobase+ASCR);
1863
1864                 /* Check if this is a Tx timer interrupt */
1865                 if (self->io.direction == IO_XMIT) {
1866                         nsc_ircc_dma_xmit(self, iobase);
1867
1868                         /* Interrupt on DMA */
1869                         self->ier = IER_DMA_IE;
1870                 } else {
1871                         /* Check (again) if DMA has finished */
1872                         if (nsc_ircc_dma_receive_complete(self, iobase)) {
1873                                 self->ier = IER_SFIF_IE;
1874                         } else {
1875                                 self->ier = IER_SFIF_IE | IER_TMR_IE;
1876                         }
1877                 }
1878         } else if (eir & EIR_DMA_EV) {
1879                 /* Finished with all transmissions? */
1880                 if (nsc_ircc_dma_xmit_complete(self)) {
1881                         if(self->new_speed != 0) {
1882                                 /* As we stop the Tx queue, the speed change
1883                                  * need to be done when the Tx fifo is
1884                                  * empty. Ask for a Tx done interrupt */
1885                                 self->ier = IER_TXEMP_IE;
1886                         } else {
1887                                 /* Check if there are more frames to be
1888                                  * transmitted */
1889                                 if (irda_device_txqueue_empty(self->netdev)) {
1890                                         /* Prepare for receive */
1891                                         nsc_ircc_dma_receive(self);
1892                                         self->ier = IER_SFIF_IE;
1893                                 } else
1894                                         IRDA_WARNING("%s(), potential "
1895                                                      "Tx queue lockup !\n",
1896                                                      __FUNCTION__);
1897                         }
1898                 } else {
1899                         /*  Not finished yet, so interrupt on DMA again */
1900                         self->ier = IER_DMA_IE;
1901                 }
1902         } else if (eir & EIR_TXEMP_EV) {
1903                 /* The Tx FIFO has totally drained out, so now we can change
1904                  * the speed... - Jean II */
1905                 self->ier = nsc_ircc_change_speed(self, self->new_speed);
1906                 self->new_speed = 0;
1907                 netif_wake_queue(self->netdev);
1908                 /* Note : nsc_ircc_change_speed() restarted Rx fifo */
1909         }
1910
1911         outb(bank, iobase+BSR);
1912 }
1913
1914 /*
1915  * Function nsc_ircc_interrupt (irq, dev_id, regs)
1916  *
1917  *    An interrupt from the chip has arrived. Time to do some work
1918  *
1919  */
1920 static irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id,
1921                                 struct pt_regs *regs)
1922 {
1923         struct net_device *dev = (struct net_device *) dev_id;
1924         struct nsc_ircc_cb *self;
1925         __u8 bsr, eir;
1926         int iobase;
1927
1928         if (!dev) {
1929                 IRDA_WARNING("%s: irq %d for unknown device.\n",
1930                              driver_name, irq);
1931                 return IRQ_NONE;
1932         }
1933         self = (struct nsc_ircc_cb *) dev->priv;
1934
1935         spin_lock(&self->lock);
1936
1937         iobase = self->io.fir_base;
1938
1939         bsr = inb(iobase+BSR);  /* Save current bank */
1940
1941         switch_bank(iobase, BANK0);
1942         self->ier = inb(iobase+IER);
1943         eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */
1944
1945         outb(0, iobase+IER); /* Disable interrupts */
1946
1947         if (eir) {
1948                 /* Dispatch interrupt handler for the current speed */
1949                 if (self->io.speed > 115200)
1950                         nsc_ircc_fir_interrupt(self, iobase, eir);
1951                 else
1952                         nsc_ircc_sir_interrupt(self, eir);
1953         }
1954
1955         outb(self->ier, iobase+IER); /* Restore interrupts */
1956         outb(bsr, iobase+BSR);       /* Restore bank register */
1957
1958         spin_unlock(&self->lock);
1959         return IRQ_RETVAL(eir);
1960 }
1961
1962 /*
1963  * Function nsc_ircc_is_receiving (self)
1964  *
1965  *    Return TRUE is we are currently receiving a frame
1966  *
1967  */
1968 static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self)
1969 {
1970         unsigned long flags;
1971         int status = FALSE;
1972         int iobase;
1973         __u8 bank;
1974
1975         IRDA_ASSERT(self != NULL, return FALSE;);
1976
1977         spin_lock_irqsave(&self->lock, flags);
1978
1979         if (self->io.speed > 115200) {
1980                 iobase = self->io.fir_base;
1981
1982                 /* Check if rx FIFO is not empty */
1983                 bank = inb(iobase+BSR);
1984                 switch_bank(iobase, BANK2);
1985                 if ((inb(iobase+RXFLV) & 0x3f) != 0) {
1986                         /* We are receiving something */
1987                         status =  TRUE;
1988                 }
1989                 outb(bank, iobase+BSR);
1990         } else
1991                 status = (self->rx_buff.state != OUTSIDE_FRAME);
1992
1993         spin_unlock_irqrestore(&self->lock, flags);
1994
1995         return status;
1996 }
1997
1998 /*
1999  * Function nsc_ircc_net_open (dev)
2000  *
2001  *    Start the device
2002  *
2003  */
2004 static int nsc_ircc_net_open(struct net_device *dev)
2005 {
2006         struct nsc_ircc_cb *self;
2007         int iobase;
2008         char hwname[32];
2009         __u8 bank;
2010
2011         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
2012
2013         IRDA_ASSERT(dev != NULL, return -1;);
2014         self = (struct nsc_ircc_cb *) dev->priv;
2015
2016         IRDA_ASSERT(self != NULL, return 0;);
2017
2018         iobase = self->io.fir_base;
2019
2020         if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) {
2021                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
2022                              driver_name, self->io.irq);
2023                 return -EAGAIN;
2024         }
2025         /*
2026          * Always allocate the DMA channel after the IRQ, and clean up on
2027          * failure.
2028          */
2029         if (request_dma(self->io.dma, dev->name)) {
2030                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
2031                              driver_name, self->io.dma);
2032                 free_irq(self->io.irq, dev);
2033                 return -EAGAIN;
2034         }
2035
2036         /* Save current bank */
2037         bank = inb(iobase+BSR);
2038
2039         /* turn on interrupts */
2040         switch_bank(iobase, BANK0);
2041         outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER);
2042
2043         /* Restore bank register */
2044         outb(bank, iobase+BSR);
2045
2046         /* Ready to play! */
2047         netif_start_queue(dev);
2048
2049         /* Give self a hardware name */
2050         sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base);
2051
2052         /*
2053          * Open new IrLAP layer instance, now that everything should be
2054          * initialized properly
2055          */
2056         self->irlap = irlap_open(dev, &self->qos, hwname);
2057
2058         return 0;
2059 }
2060
2061 /*
2062  * Function nsc_ircc_net_close (dev)
2063  *
2064  *    Stop the device
2065  *
2066  */
2067 static int nsc_ircc_net_close(struct net_device *dev)
2068 {
2069         struct nsc_ircc_cb *self;
2070         int iobase;
2071         __u8 bank;
2072
2073         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
2074
2075         IRDA_ASSERT(dev != NULL, return -1;);
2076
2077         self = (struct nsc_ircc_cb *) dev->priv;
2078         IRDA_ASSERT(self != NULL, return 0;);
2079
2080         /* Stop device */
2081         netif_stop_queue(dev);
2082
2083         /* Stop and remove instance of IrLAP */
2084         if (self->irlap)
2085                 irlap_close(self->irlap);
2086         self->irlap = NULL;
2087
2088         iobase = self->io.fir_base;
2089
2090         disable_dma(self->io.dma);
2091
2092         /* Save current bank */
2093         bank = inb(iobase+BSR);
2094
2095         /* Disable interrupts */
2096         switch_bank(iobase, BANK0);
2097         outb(0, iobase+IER);
2098
2099         free_irq(self->io.irq, dev);
2100         free_dma(self->io.dma);
2101
2102         /* Restore bank register */
2103         outb(bank, iobase+BSR);
2104
2105         return 0;
2106 }
2107
2108 /*
2109  * Function nsc_ircc_net_ioctl (dev, rq, cmd)
2110  *
2111  *    Process IOCTL commands for this device
2112  *
2113  */
2114 static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2115 {
2116         struct if_irda_req *irq = (struct if_irda_req *) rq;
2117         struct nsc_ircc_cb *self;
2118         unsigned long flags;
2119         int ret = 0;
2120
2121         IRDA_ASSERT(dev != NULL, return -1;);
2122
2123         self = dev->priv;
2124
2125         IRDA_ASSERT(self != NULL, return -1;);
2126
2127         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
2128
2129         switch (cmd) {
2130         case SIOCSBANDWIDTH: /* Set bandwidth */
2131                 if (!capable(CAP_NET_ADMIN)) {
2132                         ret = -EPERM;
2133                         break;
2134                 }
2135                 spin_lock_irqsave(&self->lock, flags);
2136                 nsc_ircc_change_speed(self, irq->ifr_baudrate);
2137                 spin_unlock_irqrestore(&self->lock, flags);
2138                 break;
2139         case SIOCSMEDIABUSY: /* Set media busy */
2140                 if (!capable(CAP_NET_ADMIN)) {
2141                         ret = -EPERM;
2142                         break;
2143                 }
2144                 irda_device_set_media_busy(self->netdev, TRUE);
2145                 break;
2146         case SIOCGRECEIVING: /* Check if we are receiving right now */
2147                 /* This is already protected */
2148                 irq->ifr_receiving = nsc_ircc_is_receiving(self);
2149                 break;
2150         default:
2151                 ret = -EOPNOTSUPP;
2152         }
2153         return ret;
2154 }
2155
2156 static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev)
2157 {
2158         struct nsc_ircc_cb *self = (struct nsc_ircc_cb *) dev->priv;
2159
2160         return &self->stats;
2161 }
2162
2163 static void nsc_ircc_suspend(struct nsc_ircc_cb *self)
2164 {
2165         IRDA_MESSAGE("%s, Suspending\n", driver_name);
2166
2167         if (self->io.suspended)
2168                 return;
2169
2170         nsc_ircc_net_close(self->netdev);
2171
2172         self->io.suspended = 1;
2173 }
2174
2175 static void nsc_ircc_wakeup(struct nsc_ircc_cb *self)
2176 {
2177         if (!self->io.suspended)
2178                 return;
2179
2180         nsc_ircc_setup(&self->io);
2181         nsc_ircc_net_open(self->netdev);
2182
2183         IRDA_MESSAGE("%s, Waking up\n", driver_name);
2184
2185         self->io.suspended = 0;
2186 }
2187
2188 static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
2189 {
2190         struct nsc_ircc_cb *self = (struct nsc_ircc_cb*) dev->data;
2191         if (self) {
2192                 switch (rqst) {
2193                 case PM_SUSPEND:
2194                         nsc_ircc_suspend(self);
2195                         break;
2196                 case PM_RESUME:
2197                         nsc_ircc_wakeup(self);
2198                         break;
2199                 }
2200         }
2201         return 0;
2202 }
2203
2204 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2205 MODULE_DESCRIPTION("NSC IrDA Device Driver");
2206 MODULE_LICENSE("GPL");
2207
2208
2209 module_param(qos_mtt_bits, int, 0);
2210 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
2211 module_param_array(io, int, NULL, 0);
2212 MODULE_PARM_DESC(io, "Base I/O addresses");
2213 module_param_array(irq, int, NULL, 0);
2214 MODULE_PARM_DESC(irq, "IRQ lines");
2215 module_param_array(dma, int, NULL, 0);
2216 MODULE_PARM_DESC(dma, "DMA channels");
2217 module_param(dongle_id, int, 0);
2218 MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
2219
2220 module_init(nsc_ircc_init);
2221 module_exit(nsc_ircc_cleanup);
2222