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   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  *     Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.com>
  16  *     All Rights Reserved
  17  *
  18  *     This program is free software; you can redistribute it and/or
  19  *     modify it under the terms of the GNU General Public License as
  20  *     published by the Free Software Foundation; either version 2 of
  21  *     the License, or (at your option) any later version.
  22  *
  23  *     Neither Dag Brattli nor University of Tromsø admit liability nor
  24  *     provide warranty for any of this software. This material is
  25  *     provided "AS-IS" and at no charge.
  26  *
  27  *     Notice that all functions that needs to access the chip in _any_
  28  *     way, must save BSR register on entry, and restore it on exit.
  29  *     It is _very_ important to follow this policy!
  30  *
  31  *         __u8 bank;
  32  *
  33  *         bank = inb(iobase+BSR);
  34  *
  35  *         do_your_stuff_here();
  36  *
  37  *         outb(bank, iobase+BSR);
  38  *
  39  *    If you find bugs in this file, its very likely that the same bug
  40  *    will also be in w83977af_ir.c since the implementations are quite
  41  *    similar.
  42  *
  43  ********************************************************************/
  44
  45 #include <linux/module.h>
  46
  47 #include <linux/kernel.h>
  48 #include <linux/types.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/netdevice.h>
  51 #include <linux/ioport.h>
  52 #include <linux/delay.h>
  53 #include <linux/slab.h>
  54 #include <linux/init.h>
  55 #include <linux/rtnetlink.h>
  56 #include <linux/dma-mapping.h>
  57 #include <linux/pnp.h>
  58 #include <linux/platform_device.h>
  59
  60 #include <asm/io.h>
  61 #include <asm/dma.h>
  62 #include <asm/byteorder.h>
  63
  64 #include <net/irda/wrapper.h>
  65 #include <net/irda/irda.h>
  66 #include <net/irda/irda_device.h>
  67
  68 #include "nsc-ircc.h"
  69
  70 #define CHIP_IO_EXTENT 8
  71 #define BROKEN_DONGLE_ID
  72
  73 static char *driver_name = "nsc-ircc";
  74
  75 /* Power Management */
  76 #define NSC_IRCC_DRIVER_NAME                  "nsc-ircc"
  77 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
  78 static int nsc_ircc_resume(struct platform_device *dev);
  79
  80 static struct platform_driver nsc_ircc_driver = {
  81         .suspend        = nsc_ircc_suspend,
  82         .resume         = nsc_ircc_resume,
  83         .driver         = {
  84                 .name   = NSC_IRCC_DRIVER_NAME,
  85         },
  86 };
  87
  88 /* Module parameters */
  89 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
  90 static int dongle_id;
  91
  92 /* Use BIOS settions by default, but user may supply module parameters */
  93 static unsigned int io[]  = { ~0, ~0, ~0, ~0, ~0 };
  94 static unsigned int irq[] = {  0,  0,  0,  0,  0 };
  95 static unsigned int dma[] = {  0,  0,  0,  0,  0 };
  96
  97 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
  98 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
  99 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info);
 100 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
 101 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
 102 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
 103 #ifdef CONFIG_PNP
 104 static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id);
 105 #endif
 106
 107 /* These are the known NSC chips */
 108 static nsc_chip_t chips[] = {
 109 /*  Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */
 110         { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0,
 111           nsc_ircc_probe_108, nsc_ircc_init_108 },
 112         { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8,
 113           nsc_ircc_probe_338, nsc_ircc_init_338 },
 114         /* Contributed by Steffen Pingel - IBM X40 */
 115         { "PC8738x", { 0x164e, 0x4e, 0x2e }, 0x20, 0xf4, 0xff,
 116           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 117         /* Contributed by Jan Frey - IBM A30/A31 */
 118         { "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff,
 119           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 120         /* IBM ThinkPads using PC8738x (T60/X60/Z60) */
 121         { "IBM-PC8738x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf4, 0xff,
 122           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 123         /* IBM ThinkPads using PC8394T (T43/R52/?) */
 124         { "IBM-PC8394T", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf9, 0xff,
 125           nsc_ircc_probe_39x, nsc_ircc_init_39x },
 126         { NULL }
 127 };
 128
 129 static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL, NULL };
 130
 131 static char *dongle_types[] = {
 132         "Differential serial interface",
 133         "Differential serial interface",
 134         "Reserved",
 135         "Reserved",
 136         "Sharp RY5HD01",
 137         "Reserved",
 138         "Single-ended serial interface",
 139         "Consumer-IR only",
 140         "HP HSDL-2300, HP HSDL-3600/HSDL-3610",
 141         "IBM31T1100 or Temic TFDS6000/TFDS6500",
 142         "Reserved",
 143         "Reserved",
 144         "HP HSDL-1100/HSDL-2100",
 145         "HP HSDL-1100/HSDL-2100",
 146         "Supports SIR Mode only",
 147         "No dongle connected",
 148 };
 149
 150 /* PNP probing */
 151 static chipio_t pnp_info;
 152 static const struct pnp_device_id nsc_ircc_pnp_table[] = {
 153         { .id = "NSC6001", .driver_data = 0 },
 154         { .id = "HWPC224", .driver_data = 0 },
 155         { .id = "IBM0071", .driver_data = NSC_FORCE_DONGLE_TYPE9 },
 156         { }
 157 };
 158
 159 MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table);
 160
 161 static struct pnp_driver nsc_ircc_pnp_driver = {
 162 #ifdef CONFIG_PNP
 163         .name = "nsc-ircc",
 164         .id_table = nsc_ircc_pnp_table,
 165         .probe = nsc_ircc_pnp_probe,
 166 #endif
 167 };
 168
 169 /* Some prototypes */
 170 static int  nsc_ircc_open(chipio_t *info);
 171 static int  nsc_ircc_close(struct nsc_ircc_cb *self);
 172 static int  nsc_ircc_setup(chipio_t *info);
 173 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
 174 static int  nsc_ircc_dma_receive(struct nsc_ircc_cb *self);
 175 static int  nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase);
 176 static int  nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
 177 static int  nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
 178 static int  nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
 179 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase);
 180 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
 181 static int  nsc_ircc_is_receiving(struct nsc_ircc_cb *self);
 182 static int  nsc_ircc_read_dongle_id (int iobase);
 183 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id);
 184
 185 static int  nsc_ircc_net_open(struct net_device *dev);
 186 static int  nsc_ircc_net_close(struct net_device *dev);
 187 static int  nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 188
 189 /* Globals */
 190 static int pnp_registered;
 191 static int pnp_succeeded;
 192
 193 /*
 194  * Function nsc_ircc_init ()
 195  *
 196  *    Initialize chip. Just try to find out how many chips we are dealing with
 197  *    and where they are
 198  */
 199 static int __init nsc_ircc_init(void)
 200 {
 201         chipio_t info;
 202         nsc_chip_t *chip;
 203         int ret;
 204         int cfg_base;
 205         int cfg, id;
 206         int reg;
 207         int i = 0;
 208
 209         ret = platform_driver_register(&nsc_ircc_driver);
 210         if (ret) {
 211                 IRDA_ERROR("%s, Can't register driver!\n", driver_name);
 212                 return ret;
 213         }
 214
 215         /* Register with PnP subsystem to detect disable ports */
 216         ret = pnp_register_driver(&nsc_ircc_pnp_driver);
 217
 218         if (!ret)
 219                 pnp_registered = 1;
 220
 221         ret = -ENODEV;
 222
 223         /* Probe for all the NSC chipsets we know about */
 224         for (chip = chips; chip->name ; chip++) {
 225                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__,
 226                            chip->name);
 227
 228                 /* Try all config registers for this chip */
 229                 for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
 230                         cfg_base = chip->cfg[cfg];
 231                         if (!cfg_base)
 232                                 continue;
 233
 234                         /* Read index register */
 235                         reg = inb(cfg_base);
 236                         if (reg == 0xff) {
 237                                 IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, cfg_base);
 238                                 continue;
 239                         }
 240
 241                         /* Read chip identification register */
 242                         outb(chip->cid_index, cfg_base);
 243                         id = inb(cfg_base+1);
 244                         if ((id & chip->cid_mask) == chip->cid_value) {
 245                                 IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
 246                                            __func__, chip->name, id & ~chip->cid_mask);
 247
 248                                 /*
 249                                  * If we found a correct PnP setting,
 250                                  * we first try it.
 251                                  */
 252                                 if (pnp_succeeded) {
 253                                         memset(&info, 0, sizeof(chipio_t));
 254                                         info.cfg_base = cfg_base;
 255                                         info.fir_base = pnp_info.fir_base;
 256                                         info.dma = pnp_info.dma;
 257                                         info.irq = pnp_info.irq;
 258
 259                                         if (info.fir_base < 0x2000) {
 260                                                 IRDA_MESSAGE("%s, chip->init\n", driver_name);
 261                                                 chip->init(chip, &info);
 262                                         } else
 263                                                 chip->probe(chip, &info);
 264
 265                                         if (nsc_ircc_open(&info) >= 0)
 266                                                 ret = 0;
 267                                 }
 268
 269                                 /*
 270                                  * Opening based on PnP values failed.
 271                                  * Let's fallback to user values, or probe
 272                                  * the chip.
 273                                  */
 274                                 if (ret) {
 275                                         IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
 276                                         memset(&info, 0, sizeof(chipio_t));
 277                                         info.cfg_base = cfg_base;
 278                                         info.fir_base = io[i];
 279                                         info.dma = dma[i];
 280                                         info.irq = irq[i];
 281
 282                                         /*
 283                                          * If the user supplies the base address, then
 284                                          * we init the chip, if not we probe the values
 285                                          * set by the BIOS
 286                                          */
 287                                         if (io[i] < 0x2000) {
 288                                                 chip->init(chip, &info);
 289                                         } else
 290                                                 chip->probe(chip, &info);
 291
 292                                         if (nsc_ircc_open(&info) >= 0)
 293                                                 ret = 0;
 294                                 }
 295                                 i++;
 296                         } else {
 297                                 IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id);
 298                         }
 299                 }
 300         }
 301
 302         if (ret) {
 303                 platform_driver_unregister(&nsc_ircc_driver);
 304                 pnp_unregister_driver(&nsc_ircc_pnp_driver);
 305                 pnp_registered = 0;
 306         }
 307
 308         return ret;
 309 }
 310
 311 /*
 312  * Function nsc_ircc_cleanup ()
 313  *
 314  *    Close all configured chips
 315  *
 316  */
 317 static void __exit nsc_ircc_cleanup(void)
 318 {
 319         int i;
 320
 321         for (i = 0; i < ARRAY_SIZE(dev_self); i++) {
 322                 if (dev_self[i])
 323                         nsc_ircc_close(dev_self[i]);
 324         }
 325
 326         platform_driver_unregister(&nsc_ircc_driver);
 327
 328         if (pnp_registered)
 329                 pnp_unregister_driver(&nsc_ircc_pnp_driver);
 330
 331         pnp_registered = 0;
 332 }
 333
 334 static const struct net_device_ops nsc_ircc_sir_ops = {
 335         .ndo_open       = nsc_ircc_net_open,
 336         .ndo_stop       = nsc_ircc_net_close,
 337         .ndo_start_xmit = nsc_ircc_hard_xmit_sir,
 338         .ndo_do_ioctl   = nsc_ircc_net_ioctl,
 339 };
 340
 341 static const struct net_device_ops nsc_ircc_fir_ops = {
 342         .ndo_open       = nsc_ircc_net_open,
 343         .ndo_stop       = nsc_ircc_net_close,
 344         .ndo_start_xmit = nsc_ircc_hard_xmit_fir,
 345         .ndo_do_ioctl   = nsc_ircc_net_ioctl,
 346 };
 347
 348 /*
 349  * Function nsc_ircc_open (iobase, irq)
 350  *
 351  *    Open driver instance
 352  *
 353  */
 354 static int __init nsc_ircc_open(chipio_t *info)
 355 {
 356         struct net_device *dev;
 357         struct nsc_ircc_cb *self;
 358         void *ret;
 359         int err, chip_index;
 360
 361         IRDA_DEBUG(2, "%s()\n", __func__);
 362
 363
 364         for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
 365                 if (!dev_self[chip_index])
 366                         break;
 367         }
 368
 369         if (chip_index == ARRAY_SIZE(dev_self)) {
 370                 IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__);
 371                 return -ENOMEM;
 372         }
 373
 374         IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
 375                      info->cfg_base);
 376
 377         if ((nsc_ircc_setup(info)) == -1)
 378                 return -1;
 379
 380         IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
 381
 382         dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
 383         if (dev == NULL) {
 384                 IRDA_ERROR("%s(), can't allocate memory for "
 385                            "control block!\n", __func__);
 386                 return -ENOMEM;
 387         }
 388
 389         self = netdev_priv(dev);
 390         self->netdev = dev;
 391         spin_lock_init(&self->lock);
 392
 393         /* Need to store self somewhere */
 394         dev_self[chip_index] = self;
 395         self->index = chip_index;
 396
 397         /* Initialize IO */
 398         self->io.cfg_base  = info->cfg_base;
 399         self->io.fir_base  = info->fir_base;
 400         self->io.irq       = info->irq;
 401         self->io.fir_ext   = CHIP_IO_EXTENT;
 402         self->io.dma       = info->dma;
 403         self->io.fifo_size = 32;
 404
 405         /* Reserve the ioports that we need */
 406         ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
 407         if (!ret) {
 408                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
 409                              __func__, self->io.fir_base);
 410                 err = -ENODEV;
 411                 goto out1;
 412         }
 413
 414         /* Initialize QoS for this device */
 415         irda_init_max_qos_capabilies(&self->qos);
 416
 417         /* The only value we must override it the baudrate */
 418         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 419                 IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
 420
 421         self->qos.min_turn_time.bits = qos_mtt_bits;
 422         irda_qos_bits_to_value(&self->qos);
 423
 424         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 425         self->rx_buff.truesize = 14384;
 426         self->tx_buff.truesize = 14384;
 427
 428         /* Allocate memory if needed */
 429         self->rx_buff.head =
 430                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 431                                    &self->rx_buff_dma, GFP_KERNEL);
 432         if (self->rx_buff.head == NULL) {
 433                 err = -ENOMEM;
 434                 goto out2;
 435
 436         }
 437         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 438
 439         self->tx_buff.head =
 440                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 441                                    &self->tx_buff_dma, GFP_KERNEL);
 442         if (self->tx_buff.head == NULL) {
 443                 err = -ENOMEM;
 444                 goto out3;
 445         }
 446         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 447
 448         self->rx_buff.in_frame = FALSE;
 449         self->rx_buff.state = OUTSIDE_FRAME;
 450         self->tx_buff.data = self->tx_buff.head;
 451         self->rx_buff.data = self->rx_buff.head;
 452
 453         /* Reset Tx queue info */
 454         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
 455         self->tx_fifo.tail = self->tx_buff.head;
 456
 457         /* Override the network functions we need to use */
 458         dev->netdev_ops = &nsc_ircc_sir_ops;
 459
 460         err = register_netdev(dev);
 461         if (err) {
 462                 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
 463                 goto out4;
 464         }
 465         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 466
 467         /* Check if user has supplied a valid dongle id or not */
 468         if ((dongle_id <= 0) ||
 469             (dongle_id >= ARRAY_SIZE(dongle_types))) {
 470                 dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
 471
 472                 IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
 473                              dongle_types[dongle_id]);
 474         } else {
 475                 IRDA_MESSAGE("%s, Using dongle: %s\n", driver_name,
 476                              dongle_types[dongle_id]);
 477         }
 478
 479         self->io.dongle_id = dongle_id;
 480         nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id);
 481
 482         self->pldev = platform_device_register_simple(NSC_IRCC_DRIVER_NAME,
 483                                                       self->index, NULL, 0);
 484         if (IS_ERR(self->pldev)) {
 485                 err = PTR_ERR(self->pldev);
 486                 goto out5;
 487         }
 488         platform_set_drvdata(self->pldev, self);
 489
 490         return chip_index;
 491
 492  out5:
 493         unregister_netdev(dev);
 494  out4:
 495         dma_free_coherent(NULL, self->tx_buff.truesize,
 496                           self->tx_buff.head, self->tx_buff_dma);
 497  out3:
 498         dma_free_coherent(NULL, self->rx_buff.truesize,
 499                           self->rx_buff.head, self->rx_buff_dma);
 500  out2:
 501         release_region(self->io.fir_base, self->io.fir_ext);
 502  out1:
 503         free_netdev(dev);
 504         dev_self[chip_index] = NULL;
 505         return err;
 506 }
 507
 508 /*
 509  * Function nsc_ircc_close (self)
 510  *
 511  *    Close driver instance
 512  *
 513  */
 514 static int __exit nsc_ircc_close(struct nsc_ircc_cb *self)
 515 {
 516         int iobase;
 517
 518         IRDA_DEBUG(4, "%s()\n", __func__);
 519
 520         IRDA_ASSERT(self != NULL, return -1;);
 521
 522         iobase = self->io.fir_base;
 523
 524         platform_device_unregister(self->pldev);
 525
 526         /* Remove netdevice */
 527         unregister_netdev(self->netdev);
 528
 529         /* Release the PORT that this driver is using */
 530         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n",
 531                    __func__, self->io.fir_base);
 532         release_region(self->io.fir_base, self->io.fir_ext);
 533
 534         if (self->tx_buff.head)
 535                 dma_free_coherent(NULL, self->tx_buff.truesize,
 536                                   self->tx_buff.head, self->tx_buff_dma);
 537
 538         if (self->rx_buff.head)
 539                 dma_free_coherent(NULL, self->rx_buff.truesize,
 540                                   self->rx_buff.head, self->rx_buff_dma);
 541
 542         dev_self[self->index] = NULL;
 543         free_netdev(self->netdev);
 544
 545         return 0;
 546 }
 547
 548 /*
 549  * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
 550  *
 551  *    Initialize the NSC '108 chip
 552  *
 553  */
 554 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info)
 555 {
 556         int cfg_base = info->cfg_base;
 557         __u8 temp=0;
 558
 559         outb(2, cfg_base);      /* Mode Control Register (MCTL) */
 560         outb(0x00, cfg_base+1); /* Disable device */
 561
 562         /* Base Address and Interrupt Control Register (BAIC) */
 563         outb(CFG_108_BAIC, cfg_base);
 564         switch (info->fir_base) {
 565         case 0x3e8: outb(0x14, cfg_base+1); break;
 566         case 0x2e8: outb(0x15, cfg_base+1); break;
 567         case 0x3f8: outb(0x16, cfg_base+1); break;
 568         case 0x2f8: outb(0x17, cfg_base+1); break;
 569         default: IRDA_ERROR("%s(), invalid base_address", __func__);
 570         }
 571
 572         /* Control Signal Routing Register (CSRT) */
 573         switch (info->irq) {
 574         case 3:  temp = 0x01; break;
 575         case 4:  temp = 0x02; break;
 576         case 5:  temp = 0x03; break;
 577         case 7:  temp = 0x04; break;
 578         case 9:  temp = 0x05; break;
 579         case 11: temp = 0x06; break;
 580         case 15: temp = 0x07; break;
 581         default: IRDA_ERROR("%s(), invalid irq", __func__);
 582         }
 583         outb(CFG_108_CSRT, cfg_base);
 584
 585         switch (info->dma) {
 586         case 0: outb(0x08+temp, cfg_base+1); break;
 587         case 1: outb(0x10+temp, cfg_base+1); break;
 588         case 3: outb(0x18+temp, cfg_base+1); break;
 589         default: IRDA_ERROR("%s(), invalid dma", __func__);
 590         }
 591
 592         outb(CFG_108_MCTL, cfg_base);      /* Mode Control Register (MCTL) */
 593         outb(0x03, cfg_base+1); /* Enable device */
 594
 595         return 0;
 596 }
 597
 598 /*
 599  * Function nsc_ircc_probe_108 (chip, info)
 600  *
 601  *
 602  *
 603  */
 604 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info)
 605 {
 606         int cfg_base = info->cfg_base;
 607         int reg;
 608
 609         /* Read address and interrupt control register (BAIC) */
 610         outb(CFG_108_BAIC, cfg_base);
 611         reg = inb(cfg_base+1);
 612
 613         switch (reg & 0x03) {
 614         case 0:
 615                 info->fir_base = 0x3e8;
 616                 break;
 617         case 1:
 618                 info->fir_base = 0x2e8;
 619                 break;
 620         case 2:
 621                 info->fir_base = 0x3f8;
 622                 break;
 623         case 3:
 624                 info->fir_base = 0x2f8;
 625                 break;
 626         }
 627         info->sir_base = info->fir_base;
 628         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__,
 629                    info->fir_base);
 630
 631         /* Read control signals routing register (CSRT) */
 632         outb(CFG_108_CSRT, cfg_base);
 633         reg = inb(cfg_base+1);
 634
 635         switch (reg & 0x07) {
 636         case 0:
 637                 info->irq = -1;
 638                 break;
 639         case 1:
 640                 info->irq = 3;
 641                 break;
 642         case 2:
 643                 info->irq = 4;
 644                 break;
 645         case 3:
 646                 info->irq = 5;
 647                 break;
 648         case 4:
 649                 info->irq = 7;
 650                 break;
 651         case 5:
 652                 info->irq = 9;
 653                 break;
 654         case 6:
 655                 info->irq = 11;
 656                 break;
 657         case 7:
 658                 info->irq = 15;
 659                 break;
 660         }
 661         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
 662
 663         /* Currently we only read Rx DMA but it will also be used for Tx */
 664         switch ((reg >> 3) & 0x03) {
 665         case 0:
 666                 info->dma = -1;
 667                 break;
 668         case 1:
 669                 info->dma = 0;
 670                 break;
 671         case 2:
 672                 info->dma = 1;
 673                 break;
 674         case 3:
 675                 info->dma = 3;
 676                 break;
 677         }
 678         IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
 679
 680         /* Read mode control register (MCTL) */
 681         outb(CFG_108_MCTL, cfg_base);
 682         reg = inb(cfg_base+1);
 683
 684         info->enabled = reg & 0x01;
 685         info->suspended = !((reg >> 1) & 0x01);
 686
 687         return 0;
 688 }
 689
 690 /*
 691  * Function nsc_ircc_init_338 (chip, info)
 692  *
 693  *    Initialize the NSC '338 chip. Remember that the 87338 needs two
 694  *    consecutive writes to the data registers while CPU interrupts are
 695  *    disabled. The 97338 does not require this, but shouldn't be any
 696  *    harm if we do it anyway.
 697  */
 698 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info)
 699 {
 700         /* No init yet */
 701
 702         return 0;
 703 }
 704
 705 /*
 706  * Function nsc_ircc_probe_338 (chip, info)
 707  *
 708  *
 709  *
 710  */
 711 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info)
 712 {
 713         int cfg_base = info->cfg_base;
 714         int reg, com = 0;
 715         int pnp;
 716
 717         /* Read funtion enable register (FER) */
 718         outb(CFG_338_FER, cfg_base);
 719         reg = inb(cfg_base+1);
 720
 721         info->enabled = (reg >> 2) & 0x01;
 722
 723         /* Check if we are in Legacy or PnP mode */
 724         outb(CFG_338_PNP0, cfg_base);
 725         reg = inb(cfg_base+1);
 726
 727         pnp = (reg >> 3) & 0x01;
 728         if (pnp) {
 729                 IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
 730                 outb(0x46, cfg_base);
 731                 reg = (inb(cfg_base+1) & 0xfe) << 2;
 732
 733                 outb(0x47, cfg_base);
 734                 reg |= ((inb(cfg_base+1) & 0xfc) << 8);
 735
 736                 info->fir_base = reg;
 737         } else {
 738                 /* Read function address register (FAR) */
 739                 outb(CFG_338_FAR, cfg_base);
 740                 reg = inb(cfg_base+1);
 741
 742                 switch ((reg >> 4) & 0x03) {
 743                 case 0:
 744                         info->fir_base = 0x3f8;
 745                         break;
 746                 case 1:
 747                         info->fir_base = 0x2f8;
 748                         break;
 749                 case 2:
 750                         com = 3;
 751                         break;
 752                 case 3:
 753                         com = 4;
 754                         break;
 755                 }
 756
 757                 if (com) {
 758                         switch ((reg >> 6) & 0x03) {
 759                         case 0:
 760                                 if (com == 3)
 761                                         info->fir_base = 0x3e8;
 762                                 else
 763                                         info->fir_base = 0x2e8;
 764                                 break;
 765                         case 1:
 766                                 if (com == 3)
 767                                         info->fir_base = 0x338;
 768                                 else
 769                                         info->fir_base = 0x238;
 770                                 break;
 771                         case 2:
 772                                 if (com == 3)
 773                                         info->fir_base = 0x2e8;
 774                                 else
 775                                         info->fir_base = 0x2e0;
 776                                 break;
 777                         case 3:
 778                                 if (com == 3)
 779                                         info->fir_base = 0x220;
 780                                 else
 781                                         info->fir_base = 0x228;
 782                                 break;
 783                         }
 784                 }
 785         }
 786         info->sir_base = info->fir_base;
 787
 788         /* Read PnP register 1 (PNP1) */
 789         outb(CFG_338_PNP1, cfg_base);
 790         reg = inb(cfg_base+1);
 791
 792         info->irq = reg >> 4;
 793
 794         /* Read PnP register 3 (PNP3) */
 795         outb(CFG_338_PNP3, cfg_base);
 796         reg = inb(cfg_base+1);
 797
 798         info->dma = (reg & 0x07) - 1;
 799
 800         /* Read power and test register (PTR) */
 801         outb(CFG_338_PTR, cfg_base);
 802         reg = inb(cfg_base+1);
 803
 804         info->suspended = reg & 0x01;
 805
 806         return 0;
 807 }
 808
 809
 810 /*
 811  * Function nsc_ircc_init_39x (chip, info)
 812  *
 813  *    Now that we know it's a '39x (see probe below), we need to
 814  *    configure it so we can use it.
 815  *
 816  * The NSC '338 chip is a Super I/O chip with a "bank" architecture,
 817  * the configuration of the different functionality (serial, parallel,
 818  * floppy...) are each in a different bank (Logical Device Number).
 819  * The base address, irq and dma configuration registers are common
 820  * to all functionalities (index 0x30 to 0x7F).
 821  * There is only one configuration register specific to the
 822  * serial port, CFG_39X_SPC.
 823  * JeanII
 824  *
 825  * Note : this code was written by Jan Frey <janfrey@web.de>
 826  */
 827 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info)
 828 {
 829         int cfg_base = info->cfg_base;
 830         int enabled;
 831
 832         /* User is sure about his config... accept it. */
 833         IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): "
 834                    "io=0x%04x, irq=%d, dma=%d\n",
 835                    __func__, info->fir_base, info->irq, info->dma);
 836
 837         /* Access bank for SP2 */
 838         outb(CFG_39X_LDN, cfg_base);
 839         outb(0x02, cfg_base+1);
 840
 841         /* Configure SP2 */
 842
 843         /* We want to enable the device if not enabled */
 844         outb(CFG_39X_ACT, cfg_base);
 845         enabled = inb(cfg_base+1) & 0x01;
 846
 847         if (!enabled) {
 848                 /* Enable the device */
 849                 outb(CFG_39X_SIOCF1, cfg_base);
 850                 outb(0x01, cfg_base+1);
 851                 /* May want to update info->enabled. Jean II */
 852         }
 853
 854         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
 855          * power mode (wake up from sleep mode) (bit 1) */
 856         outb(CFG_39X_SPC, cfg_base);
 857         outb(0x82, cfg_base+1);
 858
 859         return 0;
 860 }
 861
 862 /*
 863  * Function nsc_ircc_probe_39x (chip, info)
 864  *
 865  *    Test if we really have a '39x chip at the given address
 866  *
 867  * Note : this code was written by Jan Frey <janfrey@web.de>
 868  */
 869 static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info)
 870 {
 871         int cfg_base = info->cfg_base;
 872         int reg1, reg2, irq, irqt, dma1, dma2;
 873         int enabled, susp;
 874
 875         IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n",
 876                    __func__, cfg_base);
 877
 878         /* This function should be executed with irq off to avoid
 879          * another driver messing with the Super I/O bank - Jean II */
 880
 881         /* Access bank for SP2 */
 882         outb(CFG_39X_LDN, cfg_base);
 883         outb(0x02, cfg_base+1);
 884
 885         /* Read infos about SP2 ; store in info struct */
 886         outb(CFG_39X_BASEH, cfg_base);
 887         reg1 = inb(cfg_base+1);
 888         outb(CFG_39X_BASEL, cfg_base);
 889         reg2 = inb(cfg_base+1);
 890         info->fir_base = (reg1 << 8) | reg2;
 891
 892         outb(CFG_39X_IRQNUM, cfg_base);
 893         irq = inb(cfg_base+1);
 894         outb(CFG_39X_IRQSEL, cfg_base);
 895         irqt = inb(cfg_base+1);
 896         info->irq = irq;
 897
 898         outb(CFG_39X_DMA0, cfg_base);
 899         dma1 = inb(cfg_base+1);
 900         outb(CFG_39X_DMA1, cfg_base);
 901         dma2 = inb(cfg_base+1);
 902         info->dma = dma1 -1;
 903
 904         outb(CFG_39X_ACT, cfg_base);
 905         info->enabled = enabled = inb(cfg_base+1) & 0x01;
 906
 907         outb(CFG_39X_SPC, cfg_base);
 908         susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1);
 909
 910         IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __func__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp);
 911
 912         /* Configure SP2 */
 913
 914         /* We want to enable the device if not enabled */
 915         outb(CFG_39X_ACT, cfg_base);
 916         enabled = inb(cfg_base+1) & 0x01;
 917
 918         if (!enabled) {
 919                 /* Enable the device */
 920                 outb(CFG_39X_SIOCF1, cfg_base);
 921                 outb(0x01, cfg_base+1);
 922                 /* May want to update info->enabled. Jean II */
 923         }
 924
 925         /* Enable UART bank switching (bit 7) ; Sets the chip to normal
 926          * power mode (wake up from sleep mode) (bit 1) */
 927         outb(CFG_39X_SPC, cfg_base);
 928         outb(0x82, cfg_base+1);
 929
 930         return 0;
 931 }
 932
 933 #ifdef CONFIG_PNP
 934 /* PNP probing */
 935 static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
 936 {
 937         memset(&pnp_info, 0, sizeof(chipio_t));
 938         pnp_info.irq = -1;
 939         pnp_info.dma = -1;
 940         pnp_succeeded = 1;
 941
 942         if (id->driver_data & NSC_FORCE_DONGLE_TYPE9)
 943                 dongle_id = 0x9;
 944
 945         /* There doesn't seem to be any way of getting the cfg_base.
 946          * On my box, cfg_base is in the PnP descriptor of the
 947          * motherboard. Oh well... Jean II */
 948
 949         if (pnp_port_valid(dev, 0) &&
 950                 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED))
 951                 pnp_info.fir_base = pnp_port_start(dev, 0);
 952
 953         if (pnp_irq_valid(dev, 0) &&
 954                 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED))
 955                 pnp_info.irq = pnp_irq(dev, 0);
 956
 957         if (pnp_dma_valid(dev, 0) &&
 958                 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED))
 959                 pnp_info.dma = pnp_dma(dev, 0);
 960
 961         IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n",
 962                    __func__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma);
 963
 964         if((pnp_info.fir_base == 0) ||
 965            (pnp_info.irq == -1) || (pnp_info.dma == -1)) {
 966                 /* Returning an error will disable the device. Yuck ! */
 967                 //return -EINVAL;
 968                 pnp_succeeded = 0;
 969         }
 970
 971         return 0;
 972 }
 973 #endif
 974
 975 /*
 976  * Function nsc_ircc_setup (info)
 977  *
 978  *    Returns non-negative on success.
 979  *
 980  */
 981 static int nsc_ircc_setup(chipio_t *info)
 982 {
 983         int version;
 984         int iobase = info->fir_base;
 985
 986         /* Read the Module ID */
 987         switch_bank(iobase, BANK3);
 988         version = inb(iobase+MID);
 989
 990         IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n",
 991                    __func__, driver_name, version);
 992
 993         /* Should be 0x2? */
 994         if (0x20 != (version & 0xf0)) {
 995                 IRDA_ERROR("%s, Wrong chip version %02x\n",
 996                            driver_name, version);
 997                 return -1;
 998         }
 999
1000         /* Switch to advanced mode */
1001         switch_bank(iobase, BANK2);
1002         outb(ECR1_EXT_SL, iobase+ECR1);
1003         switch_bank(iobase, BANK0);
1004
1005         /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
1006         switch_bank(iobase, BANK0);
1007         outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1008
1009         outb(0x03, iobase+LCR);         /* 8 bit word length */
1010         outb(MCR_SIR, iobase+MCR);      /* Start at SIR-mode, also clears LSR*/
1011
1012         /* Set FIFO size to 32 */
1013         switch_bank(iobase, BANK2);
1014         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1015
1016         /* IRCR2: FEND_MD is not set */
1017         switch_bank(iobase, BANK5);
1018         outb(0x02, iobase+4);
1019
1020         /* Make sure that some defaults are OK */
1021         switch_bank(iobase, BANK6);
1022         outb(0x20, iobase+0); /* Set 32 bits FIR CRC */
1023         outb(0x0a, iobase+1); /* Set MIR pulse width */
1024         outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */
1025         outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */
1026
1027         /* Enable receive interrupts */
1028         switch_bank(iobase, BANK0);
1029         outb(IER_RXHDL_IE, iobase+IER);
1030
1031         return 0;
1032 }
1033
1034 /*
1035  * Function nsc_ircc_read_dongle_id (void)
1036  *
1037  * Try to read dongle indentification. This procedure needs to be executed
1038  * once after power-on/reset. It also needs to be used whenever you suspect
1039  * that the user may have plugged/unplugged the IrDA Dongle.
1040  */
1041 static int nsc_ircc_read_dongle_id (int iobase)
1042 {
1043         int dongle_id;
1044         __u8 bank;
1045
1046         bank = inb(iobase+BSR);
1047
1048         /* Select Bank 7 */
1049         switch_bank(iobase, BANK7);
1050
1051         /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
1052         outb(0x00, iobase+7);
1053
1054         /* ID0, 1, and 2 are pulled up/down very slowly */
1055         udelay(50);
1056
1057         /* IRCFG1: read the ID bits */
1058         dongle_id = inb(iobase+4) & 0x0f;
1059
1060 #ifdef BROKEN_DONGLE_ID
1061         if (dongle_id == 0x0a)
1062                 dongle_id = 0x09;
1063 #endif
1064         /* Go back to  bank 0 before returning */
1065         switch_bank(iobase, BANK0);
1066
1067         outb(bank, iobase+BSR);
1068
1069         return dongle_id;
1070 }
1071
1072 /*
1073  * Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
1074  *
1075  *     This function initializes the dongle for the transceiver that is
1076  *     used. This procedure needs to be executed once after
1077  *     power-on/reset. It also needs to be used whenever you suspect that
1078  *     the dongle is changed.
1079  */
1080 static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id)
1081 {
1082         int bank;
1083
1084         /* Save current bank */
1085         bank = inb(iobase+BSR);
1086
1087         /* Select Bank 7 */
1088         switch_bank(iobase, BANK7);
1089
1090         /* IRCFG4: set according to dongle_id */
1091         switch (dongle_id) {
1092         case 0x00: /* same as */
1093         case 0x01: /* Differential serial interface */
1094                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1095                            __func__, dongle_types[dongle_id]);
1096                 break;
1097         case 0x02: /* same as */
1098         case 0x03: /* Reserved */
1099                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1100                            __func__, dongle_types[dongle_id]);
1101                 break;
1102         case 0x04: /* Sharp RY5HD01 */
1103                 break;
1104         case 0x05: /* Reserved, but this is what the Thinkpad reports */
1105                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1106                            __func__, dongle_types[dongle_id]);
1107                 break;
1108         case 0x06: /* Single-ended serial interface */
1109                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1110                            __func__, dongle_types[dongle_id]);
1111                 break;
1112         case 0x07: /* Consumer-IR only */
1113                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1114                            __func__, dongle_types[dongle_id]);
1115                 break;
1116         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1117                 IRDA_DEBUG(0, "%s(), %s\n",
1118                            __func__, dongle_types[dongle_id]);
1119                 break;
1120         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1121                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1122                 break;
1123         case 0x0A: /* same as */
1124         case 0x0B: /* Reserved */
1125                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1126                            __func__, dongle_types[dongle_id]);
1127                 break;
1128         case 0x0C: /* same as */
1129         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1130                 /*
1131                  * Set irsl0 as input, irsl[1-2] as output, and separate
1132                  * inputs are used for SIR and MIR/FIR
1133                  */
1134                 outb(0x48, iobase+7);
1135                 break;
1136         case 0x0E: /* Supports SIR Mode only */
1137                 outb(0x28, iobase+7); /* Set irsl[0-2] as output */
1138                 break;
1139         case 0x0F: /* No dongle connected */
1140                 IRDA_DEBUG(0, "%s(), %s\n",
1141                            __func__, dongle_types[dongle_id]);
1142
1143                 switch_bank(iobase, BANK0);
1144                 outb(0x62, iobase+MCR);
1145                 break;
1146         default:
1147                 IRDA_DEBUG(0, "%s(), invalid dongle_id %#x",
1148                            __func__, dongle_id);
1149         }
1150
1151         /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
1152         outb(0x00, iobase+4);
1153
1154         /* Restore bank register */
1155         outb(bank, iobase+BSR);
1156
1157 } /* set_up_dongle_interface */
1158
1159 /*
1160  * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
1161  *
1162  *    Change speed of the attach dongle
1163  *
1164  */
1165 static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
1166 {
1167         __u8 bank;
1168
1169         /* Save current bank */
1170         bank = inb(iobase+BSR);
1171
1172         /* Select Bank 7 */
1173         switch_bank(iobase, BANK7);
1174
1175         /* IRCFG1: set according to dongle_id */
1176         switch (dongle_id) {
1177         case 0x00: /* same as */
1178         case 0x01: /* Differential serial interface */
1179                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1180                            __func__, dongle_types[dongle_id]);
1181                 break;
1182         case 0x02: /* same as */
1183         case 0x03: /* Reserved */
1184                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1185                            __func__, dongle_types[dongle_id]);
1186                 break;
1187         case 0x04: /* Sharp RY5HD01 */
1188                 break;
1189         case 0x05: /* Reserved */
1190                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1191                            __func__, dongle_types[dongle_id]);
1192                 break;
1193         case 0x06: /* Single-ended serial interface */
1194                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1195                            __func__, dongle_types[dongle_id]);
1196                 break;
1197         case 0x07: /* Consumer-IR only */
1198                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1199                            __func__, dongle_types[dongle_id]);
1200                 break;
1201         case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
1202                 IRDA_DEBUG(0, "%s(), %s\n",
1203                            __func__, dongle_types[dongle_id]);
1204                 outb(0x00, iobase+4);
1205                 if (speed > 115200)
1206                         outb(0x01, iobase+4);
1207                 break;
1208         case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
1209                 outb(0x01, iobase+4);
1210
1211                 if (speed == 4000000) {
1212                         /* There was a cli() there, but we now are already
1213                          * under spin_lock_irqsave() - JeanII */
1214                         outb(0x81, iobase+4);
1215                         outb(0x80, iobase+4);
1216                 } else
1217                         outb(0x00, iobase+4);
1218                 break;
1219         case 0x0A: /* same as */
1220         case 0x0B: /* Reserved */
1221                 IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
1222                            __func__, dongle_types[dongle_id]);
1223                 break;
1224         case 0x0C: /* same as */
1225         case 0x0D: /* HP HSDL-1100/HSDL-2100 */
1226                 break;
1227         case 0x0E: /* Supports SIR Mode only */
1228                 break;
1229         case 0x0F: /* No dongle connected */
1230                 IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
1231                            __func__, dongle_types[dongle_id]);
1232
1233                 switch_bank(iobase, BANK0);
1234                 outb(0x62, iobase+MCR);
1235                 break;
1236         default:
1237                 IRDA_DEBUG(0, "%s(), invalid data_rate\n", __func__);
1238         }
1239         /* Restore bank register */
1240         outb(bank, iobase+BSR);
1241 }
1242
1243 /*
1244  * Function nsc_ircc_change_speed (self, baud)
1245  *
1246  *    Change the speed of the device
1247  *
1248  * This function *must* be called with irq off and spin-lock.
1249  */
1250 static __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
1251 {
1252         struct net_device *dev = self->netdev;
1253         __u8 mcr = MCR_SIR;
1254         int iobase;
1255         __u8 bank;
1256         __u8 ier;                  /* Interrupt enable register */
1257
1258         IRDA_DEBUG(2, "%s(), speed=%d\n", __func__, speed);
1259
1260         IRDA_ASSERT(self != NULL, return 0;);
1261
1262         iobase = self->io.fir_base;
1263
1264         /* Update accounting for new speed */
1265         self->io.speed = speed;
1266
1267         /* Save current bank */
1268         bank = inb(iobase+BSR);
1269
1270         /* Disable interrupts */
1271         switch_bank(iobase, BANK0);
1272         outb(0, iobase+IER);
1273
1274         /* Select Bank 2 */
1275         switch_bank(iobase, BANK2);
1276
1277         outb(0x00, iobase+BGDH);
1278         switch (speed) {
1279         case 9600:   outb(0x0c, iobase+BGDL); break;
1280         case 19200:  outb(0x06, iobase+BGDL); break;
1281         case 38400:  outb(0x03, iobase+BGDL); break;
1282         case 57600:  outb(0x02, iobase+BGDL); break;
1283         case 115200: outb(0x01, iobase+BGDL); break;
1284         case 576000:
1285                 switch_bank(iobase, BANK5);
1286
1287                 /* IRCR2: MDRS is set */
1288                 outb(inb(iobase+4) | 0x04, iobase+4);
1289
1290                 mcr = MCR_MIR;
1291                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
1292                 break;
1293         case 1152000:
1294                 mcr = MCR_MIR;
1295                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__);
1296                 break;
1297         case 4000000:
1298                 mcr = MCR_FIR;
1299                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__);
1300                 break;
1301         default:
1302                 mcr = MCR_FIR;
1303                 IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n",
1304                            __func__, speed);
1305                 break;
1306         }
1307
1308         /* Set appropriate speed mode */
1309         switch_bank(iobase, BANK0);
1310         outb(mcr | MCR_TX_DFR, iobase+MCR);
1311
1312         /* Give some hits to the transceiver */
1313         nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
1314
1315         /* Set FIFO threshold to TX17, RX16 */
1316         switch_bank(iobase, BANK0);
1317         outb(0x00, iobase+FCR);
1318         outb(FCR_FIFO_EN, iobase+FCR);
1319         outb(FCR_RXTH|     /* Set Rx FIFO threshold */
1320              FCR_TXTH|     /* Set Tx FIFO threshold */
1321              FCR_TXSR|     /* Reset Tx FIFO */
1322              FCR_RXSR|     /* Reset Rx FIFO */
1323              FCR_FIFO_EN,  /* Enable FIFOs */
1324              iobase+FCR);
1325
1326         /* Set FIFO size to 32 */
1327         switch_bank(iobase, BANK2);
1328         outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
1329
1330         /* Enable some interrupts so we can receive frames */
1331         switch_bank(iobase, BANK0);
1332         if (speed > 115200) {
1333                 /* Install FIR xmit handler */
1334                 dev->netdev_ops = &nsc_ircc_fir_ops;
1335                 ier = IER_SFIF_IE;
1336                 nsc_ircc_dma_receive(self);
1337         } else {
1338                 /* Install SIR xmit handler */
1339                 dev->netdev_ops = &nsc_ircc_sir_ops;
1340                 ier = IER_RXHDL_IE;
1341         }
1342         /* Set our current interrupt mask */
1343         outb(ier, iobase+IER);
1344
1345         /* Restore BSR */
1346         outb(bank, iobase+BSR);
1347
1348         /* Make sure interrupt handlers keep the proper interrupt mask */
1349         return(ier);
1350 }
1351
1352 /*
1353  * Function nsc_ircc_hard_xmit (skb, dev)
1354  *
1355  *    Transmit the frame!
1356  *
1357  */
1358 static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
1359 {
1360         struct nsc_ircc_cb *self;
1361         unsigned long flags;
1362         int iobase;
1363         __s32 speed;
1364         __u8 bank;
1365
1366         self = netdev_priv(dev);
1367
1368         IRDA_ASSERT(self != NULL, return 0;);
1369
1370         iobase = self->io.fir_base;
1371
1372         netif_stop_queue(dev);
1373
1374         /* Make sure tests *& speed change are atomic */
1375         spin_lock_irqsave(&self->lock, flags);
1376
1377         /* Check if we need to change the speed */
1378         speed = irda_get_next_speed(skb);
1379         if ((speed != self->io.speed) && (speed != -1)) {
1380                 /* Check for empty frame. */
1381                 if (!skb->len) {
1382                         /* If we just sent a frame, we get called before
1383                          * the last bytes get out (because of the SIR FIFO).
1384                          * If this is the case, let interrupt handler change
1385                          * the speed itself... Jean II */
1386                         if (self->io.direction == IO_RECV) {
1387                                 nsc_ircc_change_speed(self, speed);
1388                                 /* TODO : For SIR->SIR, the next packet
1389                                  * may get corrupted - Jean II */
1390                                 netif_wake_queue(dev);
1391                         } else {
1392                                 self->new_speed = speed;
1393                                 /* Queue will be restarted after speed change
1394                                  * to make sure packets gets through the
1395                                  * proper xmit handler - Jean II */
1396                         }
1397                         dev->trans_start = jiffies;
1398                         spin_unlock_irqrestore(&self->lock, flags);
1399                         dev_kfree_skb(skb);
1400                         return 0;
1401                 } else
1402                         self->new_speed = speed;
1403         }
1404
1405         /* Save current bank */
1406         bank = inb(iobase+BSR);
1407
1408         self->tx_buff.data = self->tx_buff.head;
1409
1410         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1411                                            self->tx_buff.truesize);
1412
1413         dev->stats.tx_bytes += self->tx_buff.len;
1414
1415         /* Add interrupt on tx low level (will fire immediately) */
1416         switch_bank(iobase, BANK0);
1417         outb(IER_TXLDL_IE, iobase+IER);
1418
1419         /* Restore bank register */
1420         outb(bank, iobase+BSR);
1421
1422         dev->trans_start = jiffies;
1423         spin_unlock_irqrestore(&self->lock, flags);
1424
1425         dev_kfree_skb(skb);
1426
1427         return 0;
1428 }
1429
1430 static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1431 {
1432         struct nsc_ircc_cb *self;
1433         unsigned long flags;
1434         int iobase;
1435         __s32 speed;
1436         __u8 bank;
1437         int mtt, diff;
1438
1439         self = netdev_priv(dev);
1440         iobase = self->io.fir_base;
1441
1442         netif_stop_queue(dev);
1443
1444         /* Make sure tests *& speed change are atomic */
1445         spin_lock_irqsave(&self->lock, flags);
1446
1447         /* Check if we need to change the speed */
1448         speed = irda_get_next_speed(skb);
1449         if ((speed != self->io.speed) && (speed != -1)) {
1450                 /* Check for empty frame. */
1451                 if (!skb->len) {
1452                         /* If we are currently transmitting, defer to
1453                          * interrupt handler. - Jean II */
1454                         if(self->tx_fifo.len == 0) {
1455                                 nsc_ircc_change_speed(self, speed);
1456                                 netif_wake_queue(dev);
1457                         } else {
1458                                 self->new_speed = speed;
1459                                 /* Keep queue stopped :
1460                                  * the speed change operation may change the
1461                                  * xmit handler, and we want to make sure
1462                                  * the next packet get through the proper
1463                                  * Tx path, so block the Tx queue until
1464                                  * the speed change has been done.
1465                                  * Jean II */
1466                         }
1467                         dev->trans_start = jiffies;
1468                         spin_unlock_irqrestore(&self->lock, flags);
1469                         dev_kfree_skb(skb);
1470                         return 0;
1471                 } else {
1472                         /* Change speed after current frame */
1473                         self->new_speed = speed;
1474                 }
1475         }
1476
1477         /* Save current bank */
1478         bank = inb(iobase+BSR);
1479
1480         /* Register and copy this frame to DMA memory */
1481         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1482         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1483         self->tx_fifo.tail += skb->len;
1484
1485         dev->stats.tx_bytes += skb->len;
1486
1487         skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1488                       skb->len);
1489         self->tx_fifo.len++;
1490         self->tx_fifo.free++;
1491
1492         /* Start transmit only if there is currently no transmit going on */
1493         if (self->tx_fifo.len == 1) {
1494                 /* Check if we must wait the min turn time or not */
1495                 mtt = irda_get_mtt(skb);
1496                 if (mtt) {
1497                         /* Check how much time we have used already */
1498                         do_gettimeofday(&self->now);
1499                         diff = self->now.tv_usec - self->stamp.tv_usec;
1500                         if (diff < 0)
1501                                 diff += 1000000;
1502
1503                         /* Check if the mtt is larger than the time we have
1504                          * already used by all the protocol processing
1505                          */
1506                         if (mtt > diff) {
1507                                 mtt -= diff;
1508
1509                                 /*
1510                                  * Use timer if delay larger than 125 us, and
1511                                  * use udelay for smaller values which should
1512                                  * be acceptable
1513                                  */
1514                                 if (mtt > 125) {
1515                                         /* Adjust for timer resolution */
1516                                         mtt = mtt / 125;
1517
1518                                         /* Setup timer */
1519                                         switch_bank(iobase, BANK4);
1520                                         outb(mtt & 0xff, iobase+TMRL);
1521                                         outb((mtt >> 8) & 0x0f, iobase+TMRH);
1522
1523                                         /* Start timer */
1524                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1525                                         self->io.direction = IO_XMIT;
1526
1527                                         /* Enable timer interrupt */
1528                                         switch_bank(iobase, BANK0);
1529                                         outb(IER_TMR_IE, iobase+IER);
1530
1531                                         /* Timer will take care of the rest */
1532                                         goto out;
1533                                 } else
1534                                         udelay(mtt);
1535                         }
1536                 }
1537                 /* Enable DMA interrupt */
1538                 switch_bank(iobase, BANK0);
1539                 outb(IER_DMA_IE, iobase+IER);
1540
1541                 /* Transmit frame */
1542                 nsc_ircc_dma_xmit(self, iobase);
1543         }
1544  out:
1545         /* Not busy transmitting anymore if window is not full,
1546          * and if we don't need to change speed */
1547         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0))
1548                 netif_wake_queue(self->netdev);
1549
1550         /* Restore bank register */
1551         outb(bank, iobase+BSR);
1552
1553         dev->trans_start = jiffies;
1554         spin_unlock_irqrestore(&self->lock, flags);
1555         dev_kfree_skb(skb);
1556
1557         return 0;
1558 }
1559
1560 /*
1561  * Function nsc_ircc_dma_xmit (self, iobase)
1562  *
1563  *    Transmit data using DMA
1564  *
1565  */
1566 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase)
1567 {
1568         int bsr;
1569
1570         /* Save current bank */
1571         bsr = inb(iobase+BSR);
1572
1573         /* Disable DMA */
1574         switch_bank(iobase, BANK0);
1575         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1576
1577         self->io.direction = IO_XMIT;
1578
1579         /* Choose transmit DMA channel  */
1580         switch_bank(iobase, BANK2);
1581         outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1582
1583         irda_setup_dma(self->io.dma,
1584                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1585                         self->tx_buff.head) + self->tx_buff_dma,
1586                        self->tx_fifo.queue[self->tx_fifo.ptr].len,
1587                        DMA_TX_MODE);
1588
1589         /* Enable DMA and SIR interaction pulse */
1590         switch_bank(iobase, BANK0);
1591         outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR);
1592
1593         /* Restore bank register */
1594         outb(bsr, iobase+BSR);
1595 }
1596
1597 /*
1598  * Function nsc_ircc_pio_xmit (self, iobase)
1599  *
1600  *    Transmit data using PIO. Returns the number of bytes that actually
1601  *    got transferred
1602  *
1603  */
1604 static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
1605 {
1606         int actual = 0;
1607         __u8 bank;
1608
1609         IRDA_DEBUG(4, "%s()\n", __func__);
1610
1611         /* Save current bank */
1612         bank = inb(iobase+BSR);
1613
1614         switch_bank(iobase, BANK0);
1615         if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
1616                 IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n",
1617                            __func__);
1618
1619                 /* FIFO may still be filled to the Tx interrupt threshold */
1620                 fifo_size -= 17;
1621         }
1622
1623         /* Fill FIFO with current frame */
1624         while ((fifo_size-- > 0) && (actual < len)) {
1625                 /* Transmit next byte */
1626                 outb(buf[actual++], iobase+TXD);
1627         }
1628
1629         IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
1630                    __func__, fifo_size, actual, len);
1631
1632         /* Restore bank */
1633         outb(bank, iobase+BSR);
1634
1635         return actual;
1636 }
1637
1638 /*
1639  * Function nsc_ircc_dma_xmit_complete (self)
1640  *
1641  *    The transfer of a frame in finished. This function will only be called
1642  *    by the interrupt handler
1643  *
1644  */
1645 static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self)
1646 {
1647         int iobase;
1648         __u8 bank;
1649         int ret = TRUE;
1650
1651         IRDA_DEBUG(2, "%s()\n", __func__);
1652
1653         iobase = self->io.fir_base;
1654
1655         /* Save current bank */
1656         bank = inb(iobase+BSR);
1657
1658         /* Disable DMA */
1659         switch_bank(iobase, BANK0);
1660         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1661
1662         /* Check for underrrun! */
1663         if (inb(iobase+ASCR) & ASCR_TXUR) {
1664                 self->netdev->stats.tx_errors++;
1665                 self->netdev->stats.tx_fifo_errors++;
1666
1667                 /* Clear bit, by writing 1 into it */
1668                 outb(ASCR_TXUR, iobase+ASCR);
1669         } else {
1670                 self->netdev->stats.tx_packets++;
1671         }
1672
1673         /* Finished with this frame, so prepare for next */
1674         self->tx_fifo.ptr++;
1675         self->tx_fifo.len--;
1676
1677         /* Any frames to be sent back-to-back? */
1678         if (self->tx_fifo.len) {
1679                 nsc_ircc_dma_xmit(self, iobase);
1680
1681                 /* Not finished yet! */
1682                 ret = FALSE;
1683         } else {
1684                 /* Reset Tx FIFO info */
1685                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1686                 self->tx_fifo.tail = self->tx_buff.head;
1687         }
1688
1689         /* Make sure we have room for more frames and
1690          * that we don't need to change speed */
1691         if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) {
1692                 /* Not busy transmitting anymore */
1693                 /* Tell the network layer, that we can accept more frames */
1694                 netif_wake_queue(self->netdev);
1695         }
1696
1697         /* Restore bank */
1698         outb(bank, iobase+BSR);
1699
1700         return ret;
1701 }
1702
1703 /*
1704  * Function nsc_ircc_dma_receive (self)
1705  *
1706  *    Get ready for receiving a frame. The device will initiate a DMA
1707  *    if it starts to receive a frame.
1708  *
1709  */
1710 static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self)
1711 {
1712         int iobase;
1713         __u8 bsr;
1714
1715         iobase = self->io.fir_base;
1716
1717         /* Reset Tx FIFO info */
1718         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1719         self->tx_fifo.tail = self->tx_buff.head;
1720
1721         /* Save current bank */
1722         bsr = inb(iobase+BSR);
1723
1724         /* Disable DMA */
1725         switch_bank(iobase, BANK0);
1726         outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
1727
1728         /* Choose DMA Rx, DMA Fairness, and Advanced mode */
1729         switch_bank(iobase, BANK2);
1730         outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
1731
1732         self->io.direction = IO_RECV;
1733         self->rx_buff.data = self->rx_buff.head;
1734
1735         /* Reset Rx FIFO. This will also flush the ST_FIFO */
1736         switch_bank(iobase, BANK0);
1737         outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
1738
1739         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1740         self->st_fifo.tail = self->st_fifo.head = 0;
1741
1742         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1743                        DMA_RX_MODE);
1744
1745         /* Enable DMA */
1746         switch_bank(iobase, BANK0);
1747         outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR);
1748
1749         /* Restore bank register */
1750         outb(bsr, iobase+BSR);
1751
1752         return 0;
1753 }
1754
1755 /*
1756  * Function nsc_ircc_dma_receive_complete (self)
1757  *
1758  *    Finished with receiving frames
1759  *
1760  *
1761  */
1762 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase)
1763 {
1764         struct st_fifo *st_fifo;
1765         struct sk_buff *skb;
1766         __u8 status;
1767         __u8 bank;
1768         int len;
1769
1770         st_fifo = &self->st_fifo;
1771
1772         /* Save current bank */
1773         bank = inb(iobase+BSR);
1774
1775         /* Read all entries in status FIFO */
1776         switch_bank(iobase, BANK5);
1777         while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) {
1778                 /* We must empty the status FIFO no matter what */
1779                 len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8);
1780
1781                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1782                         IRDA_DEBUG(0, "%s(), window is full!\n", __func__);
1783                         continue;
1784                 }
1785
1786                 st_fifo->entries[st_fifo->tail].status = status;
1787                 st_fifo->entries[st_fifo->tail].len = len;
1788                 st_fifo->pending_bytes += len;
1789                 st_fifo->tail++;
1790                 st_fifo->len++;
1791         }
1792         /* Try to process all entries in status FIFO */
1793         while (st_fifo->len > 0) {
1794                 /* Get first entry */
1795                 status = st_fifo->entries[st_fifo->head].status;
1796                 len    = st_fifo->entries[st_fifo->head].len;
1797                 st_fifo->pending_bytes -= len;
1798                 st_fifo->head++;
1799                 st_fifo->len--;
1800
1801                 /* Check for errors */
1802                 if (status & FRM_ST_ERR_MSK) {
1803                         if (status & FRM_ST_LOST_FR) {
1804                                 /* Add number of lost frames to stats */
1805                                 self->netdev->stats.rx_errors += len;
1806                         } else {
1807                                 /* Skip frame */
1808                                 self->netdev->stats.rx_errors++;
1809
1810                                 self->rx_buff.data += len;
1811
1812                                 if (status & FRM_ST_MAX_LEN)
1813                                         self->netdev->stats.rx_length_errors++;
1814
1815                                 if (status & FRM_ST_PHY_ERR)
1816                                         self->netdev->stats.rx_frame_errors++;
1817
1818                                 if (status & FRM_ST_BAD_CRC)
1819                                         self->netdev->stats.rx_crc_errors++;
1820                         }
1821                         /* The errors below can be reported in both cases */
1822                         if (status & FRM_ST_OVR1)
1823                                 self->netdev->stats.rx_fifo_errors++;
1824
1825                         if (status & FRM_ST_OVR2)
1826                                 self->netdev->stats.rx_fifo_errors++;
1827                 } else {
1828                         /*
1829                          * First we must make sure that the frame we
1830                          * want to deliver is all in main memory. If we
1831                          * cannot tell, then we check if the Rx FIFO is
1832                          * empty. If not then we will have to take a nap
1833                          * and try again later.
1834                          */
1835                         if (st_fifo->pending_bytes < self->io.fifo_size) {
1836                                 switch_bank(iobase, BANK0);
1837                                 if (inb(iobase+LSR) & LSR_RXDA) {
1838                                         /* Put this entry back in fifo */
1839                                         st_fifo->head--;
1840                                         st_fifo->len++;
1841                                         st_fifo->pending_bytes += len;
1842                                         st_fifo->entries[st_fifo->head].status = status;
1843                                         st_fifo->entries[st_fifo->head].len = len;
1844                                         /*
1845                                          * DMA not finished yet, so try again
1846                                          * later, set timer value, resolution
1847                                          * 125 us
1848                                          */
1849                                         switch_bank(iobase, BANK4);
1850                                         outb(0x02, iobase+TMRL); /* x 125 us */
1851                                         outb(0x00, iobase+TMRH);
1852
1853                                         /* Start timer */
1854                                         outb(IRCR1_TMR_EN, iobase+IRCR1);
1855
1856                                         /* Restore bank register */
1857                                         outb(bank, iobase+BSR);
1858
1859                                         return FALSE; /* I'll be back! */
1860                                 }
1861                         }
1862
1863                         /*
1864                          * Remember the time we received this frame, so we can
1865                          * reduce the min turn time a bit since we will know
1866                          * how much time we have used for protocol processing
1867                          */
1868                         do_gettimeofday(&self->stamp);
1869
1870                         skb = dev_alloc_skb(len+1);
1871                         if (skb == NULL)  {
1872                                 IRDA_WARNING("%s(), memory squeeze, "
1873                                              "dropping frame.\n",
1874                                              __func__);
1875                                 self->netdev->stats.rx_dropped++;
1876
1877                                 /* Restore bank register */
1878                                 outb(bank, iobase+BSR);
1879
1880                                 return FALSE;
1881                         }
1882
1883                         /* Make sure IP header gets aligned */
1884                         skb_reserve(skb, 1);
1885
1886                         /* Copy frame without CRC */
1887                         if (self->io.speed < 4000000) {
1888                                 skb_put(skb, len-2);
1889                                 skb_copy_to_linear_data(skb,
1890                                                         self->rx_buff.data,
1891                                                         len - 2);
1892                         } else {
1893                                 skb_put(skb, len-4);
1894                                 skb_copy_to_linear_data(skb,
1895                                                         self->rx_buff.data,
1896                                                         len - 4);
1897                         }
1898
1899                         /* Move to next frame */
1900                         self->rx_buff.data += len;
1901                         self->netdev->stats.rx_bytes += len;
1902                         self->netdev->stats.rx_packets++;
1903
1904                         skb->dev = self->netdev;
1905                         skb_reset_mac_header(skb);
1906                         skb->protocol = htons(ETH_P_IRDA);
1907                         netif_rx(skb);
1908                 }
1909         }
1910         /* Restore bank register */
1911         outb(bank, iobase+BSR);
1912
1913         return TRUE;
1914 }
1915
1916 /*
1917  * Function nsc_ircc_pio_receive (self)
1918  *
1919  *    Receive all data in receiver FIFO
1920  *
1921  */
1922 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self)
1923 {
1924         __u8 byte;
1925         int iobase;
1926
1927         iobase = self->io.fir_base;
1928
1929         /*  Receive all characters in Rx FIFO */
1930         do {
1931                 byte = inb(iobase+RXD);
1932                 async_unwrap_char(self->netdev, &self->netdev->stats,
1933                                   &self->rx_buff, byte);
1934         } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */
1935 }
1936
1937 /*
1938  * Function nsc_ircc_sir_interrupt (self, eir)
1939  *
1940  *    Handle SIR interrupt
1941  *
1942  */
1943 static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
1944 {
1945         int actual;
1946
1947         /* Check if transmit FIFO is low on data */
1948         if (eir & EIR_TXLDL_EV) {
1949                 /* Write data left in transmit buffer */
1950                 actual = nsc_ircc_pio_write(self->io.fir_base,
1951                                            self->tx_buff.data,
1952                                            self->tx_buff.len,
1953                                            self->io.fifo_size);
1954                 self->tx_buff.data += actual;
1955                 self->tx_buff.len  -= actual;
1956
1957                 self->io.direction = IO_XMIT;
1958
1959                 /* Check if finished */
1960                 if (self->tx_buff.len > 0)
1961                         self->ier = IER_TXLDL_IE;
1962                 else {
1963
1964                         self->netdev->stats.tx_packets++;
1965                         netif_wake_queue(self->netdev);
1966                         self->ier = IER_TXEMP_IE;
1967                 }
1968
1969         }
1970         /* Check if transmission has completed */
1971         if (eir & EIR_TXEMP_EV) {
1972                 /* Turn around and get ready to receive some data */
1973                 self->io.direction = IO_RECV;
1974                 self->ier = IER_RXHDL_IE;
1975                 /* Check if we need to change the speed?
1976                  * Need to be after self->io.direction to avoid race with
1977                  * nsc_ircc_hard_xmit_sir() - Jean II */
1978                 if (self->new_speed) {
1979                         IRDA_DEBUG(2, "%s(), Changing speed!\n", __func__);
1980                         self->ier = nsc_ircc_change_speed(self,
1981                                                           self->new_speed);
1982                         self->new_speed = 0;
1983                         netif_wake_queue(self->netdev);
1984
1985                         /* Check if we are going to FIR */
1986                         if (self->io.speed > 115200) {
1987                                 /* No need to do anymore SIR stuff */
1988                                 return;
1989                         }
1990                 }
1991         }
1992
1993         /* Rx FIFO threshold or timeout */
1994         if (eir & EIR_RXHDL_EV) {
1995                 nsc_ircc_pio_receive(self);
1996
1997                 /* Keep receiving */
1998                 self->ier = IER_RXHDL_IE;
1999         }
2000 }
2001
2002 /*
2003  * Function nsc_ircc_fir_interrupt (self, eir)
2004  *
2005  *    Handle MIR/FIR interrupt
2006  *
2007  */
2008 static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase,
2009                                    int eir)
2010 {
2011         __u8 bank;
2012
2013         bank = inb(iobase+BSR);
2014
2015         /* Status FIFO event*/
2016         if (eir & EIR_SFIF_EV) {
2017                 /* Check if DMA has finished */
2018                 if (nsc_ircc_dma_receive_complete(self, iobase)) {
2019                         /* Wait for next status FIFO interrupt */
2020                         self->ier = IER_SFIF_IE;
2021                 } else {
2022                         self->ier = IER_SFIF_IE | IER_TMR_IE;
2023                 }
2024         } else if (eir & EIR_TMR_EV) { /* Timer finished */
2025                 /* Disable timer */
2026                 switch_bank(iobase, BANK4);
2027                 outb(0, iobase+IRCR1);
2028
2029                 /* Clear timer event */
2030                 switch_bank(iobase, BANK0);
2031                 outb(ASCR_CTE, iobase+ASCR);
2032
2033                 /* Check if this is a Tx timer interrupt */
2034                 if (self->io.direction == IO_XMIT) {
2035                         nsc_ircc_dma_xmit(self, iobase);
2036
2037                         /* Interrupt on DMA */
2038                         self->ier = IER_DMA_IE;
2039                 } else {
2040                         /* Check (again) if DMA has finished */
2041                         if (nsc_ircc_dma_receive_complete(self, iobase)) {
2042                                 self->ier = IER_SFIF_IE;
2043                         } else {
2044                                 self->ier = IER_SFIF_IE | IER_TMR_IE;
2045                         }
2046                 }
2047         } else if (eir & EIR_DMA_EV) {
2048                 /* Finished with all transmissions? */
2049                 if (nsc_ircc_dma_xmit_complete(self)) {
2050                         if(self->new_speed != 0) {
2051                                 /* As we stop the Tx queue, the speed change
2052                                  * need to be done when the Tx fifo is
2053                                  * empty. Ask for a Tx done interrupt */
2054                                 self->ier = IER_TXEMP_IE;
2055                         } else {
2056                                 /* Check if there are more frames to be
2057                                  * transmitted */
2058                                 if (irda_device_txqueue_empty(self->netdev)) {
2059                                         /* Prepare for receive */
2060                                         nsc_ircc_dma_receive(self);
2061                                         self->ier = IER_SFIF_IE;
2062                                 } else
2063                                         IRDA_WARNING("%s(), potential "
2064                                                      "Tx queue lockup !\n",
2065                                                      __func__);
2066                         }
2067                 } else {
2068                         /*  Not finished yet, so interrupt on DMA again */
2069                         self->ier = IER_DMA_IE;
2070                 }
2071         } else if (eir & EIR_TXEMP_EV) {
2072                 /* The Tx FIFO has totally drained out, so now we can change
2073                  * the speed... - Jean II */
2074                 self->ier = nsc_ircc_change_speed(self, self->new_speed);
2075                 self->new_speed = 0;
2076                 netif_wake_queue(self->netdev);
2077                 /* Note : nsc_ircc_change_speed() restarted Rx fifo */
2078         }
2079
2080         outb(bank, iobase+BSR);
2081 }
2082
2083 /*
2084  * Function nsc_ircc_interrupt (irq, dev_id, regs)
2085  *
2086  *    An interrupt from the chip has arrived. Time to do some work
2087  *
2088  */
2089 static irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id)
2090 {
2091         struct net_device *dev = dev_id;
2092         struct nsc_ircc_cb *self;
2093         __u8 bsr, eir;
2094         int iobase;
2095
2096         self = netdev_priv(dev);
2097
2098         spin_lock(&self->lock);
2099
2100         iobase = self->io.fir_base;
2101
2102         bsr = inb(iobase+BSR);  /* Save current bank */
2103
2104         switch_bank(iobase, BANK0);
2105         self->ier = inb(iobase+IER);
2106         eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */
2107
2108         outb(0, iobase+IER); /* Disable interrupts */
2109
2110         if (eir) {
2111                 /* Dispatch interrupt handler for the current speed */
2112                 if (self->io.speed > 115200)
2113                         nsc_ircc_fir_interrupt(self, iobase, eir);
2114                 else
2115                         nsc_ircc_sir_interrupt(self, eir);
2116         }
2117
2118         outb(self->ier, iobase+IER); /* Restore interrupts */
2119         outb(bsr, iobase+BSR);       /* Restore bank register */
2120
2121         spin_unlock(&self->lock);
2122         return IRQ_RETVAL(eir);
2123 }
2124
2125 /*
2126  * Function nsc_ircc_is_receiving (self)
2127  *
2128  *    Return TRUE is we are currently receiving a frame
2129  *
2130  */
2131 static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self)
2132 {
2133         unsigned long flags;
2134         int status = FALSE;
2135         int iobase;
2136         __u8 bank;
2137
2138         IRDA_ASSERT(self != NULL, return FALSE;);
2139
2140         spin_lock_irqsave(&self->lock, flags);
2141
2142         if (self->io.speed > 115200) {
2143                 iobase = self->io.fir_base;
2144
2145                 /* Check if rx FIFO is not empty */
2146                 bank = inb(iobase+BSR);
2147                 switch_bank(iobase, BANK2);
2148                 if ((inb(iobase+RXFLV) & 0x3f) != 0) {
2149                         /* We are receiving something */
2150                         status =  TRUE;
2151                 }
2152                 outb(bank, iobase+BSR);
2153         } else
2154                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2155
2156         spin_unlock_irqrestore(&self->lock, flags);
2157
2158         return status;
2159 }
2160
2161 /*
2162  * Function nsc_ircc_net_open (dev)
2163  *
2164  *    Start the device
2165  *
2166  */
2167 static int nsc_ircc_net_open(struct net_device *dev)
2168 {
2169         struct nsc_ircc_cb *self;
2170         int iobase;
2171         char hwname[32];
2172         __u8 bank;
2173
2174         IRDA_DEBUG(4, "%s()\n", __func__);
2175
2176         IRDA_ASSERT(dev != NULL, return -1;);
2177         self = netdev_priv(dev);
2178
2179         IRDA_ASSERT(self != NULL, return 0;);
2180
2181         iobase = self->io.fir_base;
2182
2183         if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) {
2184                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
2185                              driver_name, self->io.irq);
2186                 return -EAGAIN;
2187         }
2188         /*
2189          * Always allocate the DMA channel after the IRQ, and clean up on
2190          * failure.
2191          */
2192         if (request_dma(self->io.dma, dev->name)) {
2193                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
2194                              driver_name, self->io.dma);
2195                 free_irq(self->io.irq, dev);
2196                 return -EAGAIN;
2197         }
2198
2199         /* Save current bank */
2200         bank = inb(iobase+BSR);
2201
2202         /* turn on interrupts */
2203         switch_bank(iobase, BANK0);
2204         outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER);
2205
2206         /* Restore bank register */
2207         outb(bank, iobase+BSR);
2208
2209         /* Ready to play! */
2210         netif_start_queue(dev);
2211
2212         /* Give self a hardware name */
2213         sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base);
2214
2215         /*
2216          * Open new IrLAP layer instance, now that everything should be
2217          * initialized properly
2218          */
2219         self->irlap = irlap_open(dev, &self->qos, hwname);
2220
2221         return 0;
2222 }
2223
2224 /*
2225  * Function nsc_ircc_net_close (dev)
2226  *
2227  *    Stop the device
2228  *
2229  */
2230 static int nsc_ircc_net_close(struct net_device *dev)
2231 {
2232         struct nsc_ircc_cb *self;
2233         int iobase;
2234         __u8 bank;
2235
2236         IRDA_DEBUG(4, "%s()\n", __func__);
2237
2238         IRDA_ASSERT(dev != NULL, return -1;);
2239
2240         self = netdev_priv(dev);
2241         IRDA_ASSERT(self != NULL, return 0;);
2242
2243         /* Stop device */
2244         netif_stop_queue(dev);
2245
2246         /* Stop and remove instance of IrLAP */
2247         if (self->irlap)
2248                 irlap_close(self->irlap);
2249         self->irlap = NULL;
2250
2251         iobase = self->io.fir_base;
2252
2253         disable_dma(self->io.dma);
2254
2255         /* Save current bank */
2256         bank = inb(iobase+BSR);
2257
2258         /* Disable interrupts */
2259         switch_bank(iobase, BANK0);
2260         outb(0, iobase+IER);
2261
2262         free_irq(self->io.irq, dev);
2263         free_dma(self->io.dma);
2264
2265         /* Restore bank register */
2266         outb(bank, iobase+BSR);
2267
2268         return 0;
2269 }
2270
2271 /*
2272  * Function nsc_ircc_net_ioctl (dev, rq, cmd)
2273  *
2274  *    Process IOCTL commands for this device
2275  *
2276  */
2277 static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2278 {
2279         struct if_irda_req *irq = (struct if_irda_req *) rq;
2280         struct nsc_ircc_cb *self;
2281         unsigned long flags;
2282         int ret = 0;
2283
2284         IRDA_ASSERT(dev != NULL, return -1;);
2285
2286         self = netdev_priv(dev);
2287
2288         IRDA_ASSERT(self != NULL, return -1;);
2289
2290         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
2291
2292         switch (cmd) {
2293         case SIOCSBANDWIDTH: /* Set bandwidth */
2294                 if (!capable(CAP_NET_ADMIN)) {
2295                         ret = -EPERM;
2296                         break;
2297                 }
2298                 spin_lock_irqsave(&self->lock, flags);
2299                 nsc_ircc_change_speed(self, irq->ifr_baudrate);
2300                 spin_unlock_irqrestore(&self->lock, flags);
2301                 break;
2302         case SIOCSMEDIABUSY: /* Set media busy */
2303                 if (!capable(CAP_NET_ADMIN)) {
2304                         ret = -EPERM;
2305                         break;
2306                 }
2307                 irda_device_set_media_busy(self->netdev, TRUE);
2308                 break;
2309         case SIOCGRECEIVING: /* Check if we are receiving right now */
2310                 /* This is already protected */
2311                 irq->ifr_receiving = nsc_ircc_is_receiving(self);
2312                 break;
2313         default:
2314                 ret = -EOPNOTSUPP;
2315         }
2316         return ret;
2317 }
2318
2319 static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
2320 {
2321         struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2322         int bank;
2323         unsigned long flags;
2324         int iobase = self->io.fir_base;
2325
2326         if (self->io.suspended)
2327                 return 0;
2328
2329         IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
2330
2331         rtnl_lock();
2332         if (netif_running(self->netdev)) {
2333                 netif_device_detach(self->netdev);
2334                 spin_lock_irqsave(&self->lock, flags);
2335                 /* Save current bank */
2336                 bank = inb(iobase+BSR);
2337
2338                 /* Disable interrupts */
2339                 switch_bank(iobase, BANK0);
2340                 outb(0, iobase+IER);
2341
2342                 /* Restore bank register */
2343                 outb(bank, iobase+BSR);
2344
2345                 spin_unlock_irqrestore(&self->lock, flags);
2346                 free_irq(self->io.irq, self->netdev);
2347                 disable_dma(self->io.dma);
2348         }
2349         self->io.suspended = 1;
2350         rtnl_unlock();
2351
2352         return 0;
2353 }
2354
2355 static int nsc_ircc_resume(struct platform_device *dev)
2356 {
2357         struct nsc_ircc_cb *self = platform_get_drvdata(dev);
2358         unsigned long flags;
2359
2360         if (!self->io.suspended)
2361                 return 0;
2362
2363         IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
2364
2365         rtnl_lock();
2366         nsc_ircc_setup(&self->io);
2367         nsc_ircc_init_dongle_interface(self->io.fir_base, self->io.dongle_id);
2368
2369         if (netif_running(self->netdev)) {
2370                 if (request_irq(self->io.irq, nsc_ircc_interrupt, 0,
2371                                 self->netdev->name, self->netdev)) {
2372                         IRDA_WARNING("%s, unable to allocate irq=%d\n",
2373                                      driver_name, self->io.irq);
2374
2375                         /*
2376                          * Don't fail resume process, just kill this
2377                          * network interface
2378                          */
2379                         unregister_netdevice(self->netdev);
2380                 } else {
2381                         spin_lock_irqsave(&self->lock, flags);
2382                         nsc_ircc_change_speed(self, self->io.speed);
2383                         spin_unlock_irqrestore(&self->lock, flags);
2384                         netif_device_attach(self->netdev);
2385                 }
2386
2387         } else {
2388                 spin_lock_irqsave(&self->lock, flags);
2389                 nsc_ircc_change_speed(self, 9600);
2390                 spin_unlock_irqrestore(&self->lock, flags);
2391         }
2392         self->io.suspended = 0;
2393         rtnl_unlock();
2394
2395         return 0;
2396 }
2397
2398 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2399 MODULE_DESCRIPTION("NSC IrDA Device Driver");
2400 MODULE_LICENSE("GPL");
2401
2402
2403 module_param(qos_mtt_bits, int, 0);
2404 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
2405 module_param_array(io, int, NULL, 0);
2406 MODULE_PARM_DESC(io, "Base I/O addresses");
2407 module_param_array(irq, int, NULL, 0);
2408 MODULE_PARM_DESC(irq, "IRQ lines");
2409 module_param_array(dma, int, NULL, 0);
2410 MODULE_PARM_DESC(dma, "DMA channels");
2411 module_param(dongle_id, int, 0);
2412 MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
2413
2414 module_init(nsc_ircc_init);
2415 module_exit(nsc_ircc_cleanup);
2416