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

   1 /*********************************************************************
   2  *
   3  * Filename:      ali-ircc.h
   4  * Version:       0.5
   5  * Description:   Driver for the ALI M1535D and M1543C FIR Controller
   6  * Status:        Experimental.
   7  * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
   8  * Created at:    2000/10/16 03:46PM
   9  * Modified at:   2001/1/3 02:55PM
  10  * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
  11  * Modified at:   2003/11/6 and support for ALi south-bridge chipsets M1563
  12  * Modified by:   Clear Zhang <clear_zhang@ali.com.tw>
  13  *
  14  *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
  15  *     All Rights Reserved
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2 of
  20  *     the License, or (at your option) any later version.
  21  *
  22  ********************************************************************/
  23
  24 #include <linux/module.h>
  25
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/ioport.h>
  31 #include <linux/delay.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/rtnetlink.h>
  35 #include <linux/serial_reg.h>
  36 #include <linux/dma-mapping.h>
  37
  38 #include <asm/io.h>
  39 #include <asm/dma.h>
  40 #include <asm/byteorder.h>
  41
  42 #include <linux/pm.h>
  43
  44 #include <net/irda/wrapper.h>
  45 #include <net/irda/irda.h>
  46 #include <net/irda/irda_device.h>
  47
  48 #include "ali-ircc.h"
  49
  50 #define CHIP_IO_EXTENT 8
  51 #define BROKEN_DONGLE_ID
  52
  53 static char *driver_name = "ali-ircc";
  54
  55 /* Module parameters */
  56 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
  57
  58 /* Use BIOS settions by default, but user may supply module parameters */
  59 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
  60 static unsigned int irq[] = { 0, 0, 0, 0 };
  61 static unsigned int dma[] = { 0, 0, 0, 0 };
  62
  63 static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
  64 static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
  65 static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
  66
  67 /* These are the currently known ALi sourth-bridge chipsets, the only one difference
  68  * is that M1543C doesn't support HP HDSL-3600
  69  */
  70 static ali_chip_t chips[] =
  71 {
  72         { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
  73         { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
  74         { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
  75         { NULL }
  76 };
  77
  78 /* Max 4 instances for now */
  79 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
  80
  81 /* Dongle Types */
  82 static char *dongle_types[] = {
  83         "TFDS6000",
  84         "HP HSDL-3600",
  85         "HP HSDL-1100",
  86         "No dongle connected",
  87 };
  88
  89 /* Some prototypes */
  90 static int  ali_ircc_open(int i, chipio_t *info);
  91
  92 static int  ali_ircc_close(struct ali_ircc_cb *self);
  93
  94 static int  ali_ircc_setup(chipio_t *info);
  95 static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
  96 static int  ali_ircc_net_open(struct net_device *dev);
  97 static int  ali_ircc_net_close(struct net_device *dev);
  98 static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
  99 static int  ali_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 100 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
 101 static void ali_ircc_suspend(struct ali_ircc_cb *self);
 102 static void ali_ircc_wakeup(struct ali_ircc_cb *self);
 103 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);
 104
 105 /* SIR function */
 106 static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
 107 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
 108 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
 109 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
 110 static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
 111 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
 112
 113 /* FIR function */
 114 static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
 115 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
 116 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
 117 static int  ali_ircc_dma_receive(struct ali_ircc_cb *self);
 118 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
 119 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
 120 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
 121
 122 /* My Function */
 123 static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
 124 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
 125
 126 /* ALi chip function */
 127 static void SIR2FIR(int iobase);
 128 static void FIR2SIR(int iobase);
 129 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
 130
 131 /*
 132  * Function ali_ircc_init ()
 133  *
 134  *    Initialize chip. Find out whay kinds of chips we are dealing with
 135  *    and their configuation registers address
 136  */
 137 static int __init ali_ircc_init(void)
 138 {
 139         ali_chip_t *chip;
 140         chipio_t info;
 141         int ret = -ENODEV;
 142         int cfg, cfg_base;
 143         int reg, revision;
 144         int i = 0;
 145
 146         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 147
 148         /* Probe for all the ALi chipsets we know about */
 149         for (chip= chips; chip->name; chip++, i++)
 150         {
 151                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
 152
 153                 /* Try all config registers for this chip */
 154                 for (cfg=0; cfg<2; cfg++)
 155                 {
 156                         cfg_base = chip->cfg[cfg];
 157                         if (!cfg_base)
 158                                 continue;
 159
 160                         memset(&info, 0, sizeof(chipio_t));
 161                         info.cfg_base = cfg_base;
 162                         info.fir_base = io[i];
 163                         info.dma = dma[i];
 164                         info.irq = irq[i];
 165
 166
 167                         /* Enter Configuration */
 168                         outb(chip->entr1, cfg_base);
 169                         outb(chip->entr2, cfg_base);
 170
 171                         /* Select Logical Device 5 Registers (UART2) */
 172                         outb(0x07, cfg_base);
 173                         outb(0x05, cfg_base+1);
 174
 175                         /* Read Chip Identification Register */
 176                         outb(chip->cid_index, cfg_base);
 177                         reg = inb(cfg_base+1);
 178
 179                         if (reg == chip->cid_value)
 180                         {
 181                                 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
 182
 183                                 outb(0x1F, cfg_base);
 184                                 revision = inb(cfg_base+1);
 185                                 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
 186                                            chip->name, revision);
 187
 188                                 /*
 189                                  * If the user supplies the base address, then
 190                                  * we init the chip, if not we probe the values
 191                                  * set by the BIOS
 192                                  */
 193                                 if (io[i] < 2000)
 194                                 {
 195                                         chip->init(chip, &info);
 196                                 }
 197                                 else
 198                                 {
 199                                         chip->probe(chip, &info);
 200                                 }
 201
 202                                 if (ali_ircc_open(i, &info) == 0)
 203                                         ret = 0;
 204                                 i++;
 205                         }
 206                         else
 207                         {
 208                                 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
 209                         }
 210                         /* Exit configuration */
 211                         outb(0xbb, cfg_base);
 212                 }
 213         }
 214
 215         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 216         return ret;
 217 }
 218
 219 /*
 220  * Function ali_ircc_cleanup ()
 221  *
 222  *    Close all configured chips
 223  *
 224  */
 225 static void __exit ali_ircc_cleanup(void)
 226 {
 227         int i;
 228
 229         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 230
 231         pm_unregister_all(ali_ircc_pmproc);
 232
 233         for (i=0; i < 4; i++) {
 234                 if (dev_self[i])
 235                         ali_ircc_close(dev_self[i]);
 236         }
 237
 238         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 239 }
 240
 241 /*
 242  * Function ali_ircc_open (int i, chipio_t *inf)
 243  *
 244  *    Open driver instance
 245  *
 246  */
 247 static int ali_ircc_open(int i, chipio_t *info)
 248 {
 249         struct net_device *dev;
 250         struct ali_ircc_cb *self;
 251         struct pm_dev *pmdev;
 252         int dongle_id;
 253         int err;
 254
 255         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 256
 257         /* Set FIR FIFO and DMA Threshold */
 258         if ((ali_ircc_setup(info)) == -1)
 259                 return -1;
 260
 261         dev = alloc_irdadev(sizeof(*self));
 262         if (dev == NULL) {
 263                 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
 264                            __FUNCTION__);
 265                 return -ENOMEM;
 266         }
 267
 268         self = dev->priv;
 269         self->netdev = dev;
 270         spin_lock_init(&self->lock);
 271
 272         /* Need to store self somewhere */
 273         dev_self[i] = self;
 274         self->index = i;
 275
 276         /* Initialize IO */
 277         self->io.cfg_base  = info->cfg_base;    /* In ali_ircc_probe_53 assign          */
 278         self->io.fir_base  = info->fir_base;    /* info->sir_base = info->fir_base      */
 279         self->io.sir_base  = info->sir_base;    /* ALi SIR and FIR use the same address */
 280         self->io.irq       = info->irq;
 281         self->io.fir_ext   = CHIP_IO_EXTENT;
 282         self->io.dma       = info->dma;
 283         self->io.fifo_size = 16;                /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
 284
 285         /* Reserve the ioports that we need */
 286         if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
 287                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
 288                         self->io.fir_base);
 289                 err = -ENODEV;
 290                 goto err_out1;
 291         }
 292
 293         /* Initialize QoS for this device */
 294         irda_init_max_qos_capabilies(&self->qos);
 295
 296         /* The only value we must override it the baudrate */
 297         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 298                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
 299
 300         self->qos.min_turn_time.bits = qos_mtt_bits;
 301
 302         irda_qos_bits_to_value(&self->qos);
 303
 304         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 305         self->rx_buff.truesize = 14384;
 306         self->tx_buff.truesize = 14384;
 307
 308         /* Allocate memory if needed */
 309         self->rx_buff.head =
 310                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 311                                    &self->rx_buff_dma, GFP_KERNEL);
 312         if (self->rx_buff.head == NULL) {
 313                 err = -ENOMEM;
 314                 goto err_out2;
 315         }
 316         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 317
 318         self->tx_buff.head =
 319                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 320                                    &self->tx_buff_dma, GFP_KERNEL);
 321         if (self->tx_buff.head == NULL) {
 322                 err = -ENOMEM;
 323                 goto err_out3;
 324         }
 325         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 326
 327         self->rx_buff.in_frame = FALSE;
 328         self->rx_buff.state = OUTSIDE_FRAME;
 329         self->tx_buff.data = self->tx_buff.head;
 330         self->rx_buff.data = self->rx_buff.head;
 331
 332         /* Reset Tx queue info */
 333         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
 334         self->tx_fifo.tail = self->tx_buff.head;
 335
 336
 337         /* Keep track of module usage */
 338         SET_MODULE_OWNER(dev);
 339
 340         /* Override the network functions we need to use */
 341         dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
 342         dev->open            = ali_ircc_net_open;
 343         dev->stop            = ali_ircc_net_close;
 344         dev->do_ioctl        = ali_ircc_net_ioctl;
 345         dev->get_stats       = ali_ircc_net_get_stats;
 346
 347         err = register_netdev(dev);
 348         if (err) {
 349                 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
 350                 goto err_out4;
 351         }
 352         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 353
 354         /* Check dongle id */
 355         dongle_id = ali_ircc_read_dongle_id(i, info);
 356         IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__, driver_name, dongle_types[dongle_id]);
 357
 358         self->io.dongle_id = dongle_id;
 359
 360         pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, ali_ircc_pmproc);
 361         if (pmdev)
 362                 pmdev->data = self;
 363
 364         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 365
 366         return 0;
 367
 368  err_out4:
 369         dma_free_coherent(NULL, self->tx_buff.truesize,
 370                           self->tx_buff.head, self->tx_buff_dma);
 371  err_out3:
 372         dma_free_coherent(NULL, self->rx_buff.truesize,
 373                           self->rx_buff.head, self->rx_buff_dma);
 374  err_out2:
 375         release_region(self->io.fir_base, self->io.fir_ext);
 376  err_out1:
 377         dev_self[i] = NULL;
 378         free_netdev(dev);
 379         return err;
 380 }
 381
 382
 383 /*
 384  * Function ali_ircc_close (self)
 385  *
 386  *    Close driver instance
 387  *
 388  */
 389 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
 390 {
 391         int iobase;
 392
 393         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 394
 395         IRDA_ASSERT(self != NULL, return -1;);
 396
 397         iobase = self->io.fir_base;
 398
 399         /* Remove netdevice */
 400         unregister_netdev(self->netdev);
 401
 402         /* Release the PORT that this driver is using */
 403         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
 404         release_region(self->io.fir_base, self->io.fir_ext);
 405
 406         if (self->tx_buff.head)
 407                 dma_free_coherent(NULL, self->tx_buff.truesize,
 408                                   self->tx_buff.head, self->tx_buff_dma);
 409
 410         if (self->rx_buff.head)
 411                 dma_free_coherent(NULL, self->rx_buff.truesize,
 412                                   self->rx_buff.head, self->rx_buff_dma);
 413
 414         dev_self[self->index] = NULL;
 415         free_netdev(self->netdev);
 416
 417         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 418
 419         return 0;
 420 }
 421
 422 /*
 423  * Function ali_ircc_init_43 (chip, info)
 424  *
 425  *    Initialize the ALi M1543 chip.
 426  */
 427 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
 428 {
 429         /* All controller information like I/O address, DMA channel, IRQ
 430          * are set by BIOS
 431          */
 432
 433         return 0;
 434 }
 435
 436 /*
 437  * Function ali_ircc_init_53 (chip, info)
 438  *
 439  *    Initialize the ALi M1535 chip.
 440  */
 441 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
 442 {
 443         /* All controller information like I/O address, DMA channel, IRQ
 444          * are set by BIOS
 445          */
 446
 447         return 0;
 448 }
 449
 450 /*
 451  * Function ali_ircc_probe_53 (chip, info)
 452  *
 453  *      Probes for the ALi M1535D or M1535
 454  */
 455 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
 456 {
 457         int cfg_base = info->cfg_base;
 458         int hi, low, reg;
 459
 460         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 461
 462         /* Enter Configuration */
 463         outb(chip->entr1, cfg_base);
 464         outb(chip->entr2, cfg_base);
 465
 466         /* Select Logical Device 5 Registers (UART2) */
 467         outb(0x07, cfg_base);
 468         outb(0x05, cfg_base+1);
 469
 470         /* Read address control register */
 471         outb(0x60, cfg_base);
 472         hi = inb(cfg_base+1);
 473         outb(0x61, cfg_base);
 474         low = inb(cfg_base+1);
 475         info->fir_base = (hi<<8) + low;
 476
 477         info->sir_base = info->fir_base;
 478
 479         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
 480
 481         /* Read IRQ control register */
 482         outb(0x70, cfg_base);
 483         reg = inb(cfg_base+1);
 484         info->irq = reg & 0x0f;
 485         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
 486
 487         /* Read DMA channel */
 488         outb(0x74, cfg_base);
 489         reg = inb(cfg_base+1);
 490         info->dma = reg & 0x07;
 491
 492         if(info->dma == 0x04)
 493                 IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
 494         else
 495                 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
 496
 497         /* Read Enabled Status */
 498         outb(0x30, cfg_base);
 499         reg = inb(cfg_base+1);
 500         info->enabled = (reg & 0x80) && (reg & 0x01);
 501         IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
 502
 503         /* Read Power Status */
 504         outb(0x22, cfg_base);
 505         reg = inb(cfg_base+1);
 506         info->suspended = (reg & 0x20);
 507         IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
 508
 509         /* Exit configuration */
 510         outb(0xbb, cfg_base);
 511
 512         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 513
 514         return 0;
 515 }
 516
 517 /*
 518  * Function ali_ircc_setup (info)
 519  *
 520  *      Set FIR FIFO and DMA Threshold
 521  *      Returns non-negative on success.
 522  *
 523  */
 524 static int ali_ircc_setup(chipio_t *info)
 525 {
 526         unsigned char tmp;
 527         int version;
 528         int iobase = info->fir_base;
 529
 530         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 531
 532         /* Locking comments :
 533          * Most operations here need to be protected. We are called before
 534          * the device instance is created in ali_ircc_open(), therefore
 535          * nobody can bother us - Jean II */
 536
 537         /* Switch to FIR space */
 538         SIR2FIR(iobase);
 539
 540         /* Master Reset */
 541         outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
 542
 543         /* Read FIR ID Version Register */
 544         switch_bank(iobase, BANK3);
 545         version = inb(iobase+FIR_ID_VR);
 546
 547         /* Should be 0x00 in the M1535/M1535D */
 548         if(version != 0x00)
 549         {
 550                 IRDA_ERROR("%s, Wrong chip version %02x\n", driver_name, version);
 551                 return -1;
 552         }
 553
 554         // IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name, info->cfg_base);
 555
 556         /* Set FIR FIFO Threshold Register */
 557         switch_bank(iobase, BANK1);
 558         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
 559
 560         /* Set FIR DMA Threshold Register */
 561         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
 562
 563         /* CRC enable */
 564         switch_bank(iobase, BANK2);
 565         outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
 566
 567         /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
 568
 569         /* Switch to Bank 0 */
 570         switch_bank(iobase, BANK0);
 571
 572         tmp = inb(iobase+FIR_LCR_B);
 573         tmp &=~0x20; // disable SIP
 574         tmp |= 0x80; // these two steps make RX mode
 575         tmp &= 0xbf;
 576         outb(tmp, iobase+FIR_LCR_B);
 577
 578         /* Disable Interrupt */
 579         outb(0x00, iobase+FIR_IER);
 580
 581
 582         /* Switch to SIR space */
 583         FIR2SIR(iobase);
 584
 585         IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n", driver_name);
 586
 587         /* Enable receive interrupts */
 588         // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
 589         // Turn on the interrupts in ali_ircc_net_open
 590
 591         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 592
 593         return 0;
 594 }
 595
 596 /*
 597  * Function ali_ircc_read_dongle_id (int index, info)
 598  *
 599  * Try to read dongle indentification. This procedure needs to be executed
 600  * once after power-on/reset. It also needs to be used whenever you suspect
 601  * that the user may have plugged/unplugged the IrDA Dongle.
 602  */
 603 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
 604 {
 605         int dongle_id, reg;
 606         int cfg_base = info->cfg_base;
 607
 608         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 609
 610         /* Enter Configuration */
 611         outb(chips[i].entr1, cfg_base);
 612         outb(chips[i].entr2, cfg_base);
 613
 614         /* Select Logical Device 5 Registers (UART2) */
 615         outb(0x07, cfg_base);
 616         outb(0x05, cfg_base+1);
 617
 618         /* Read Dongle ID */
 619         outb(0xf0, cfg_base);
 620         reg = inb(cfg_base+1);
 621         dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
 622         IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__,
 623                 dongle_id, dongle_types[dongle_id]);
 624
 625         /* Exit configuration */
 626         outb(0xbb, cfg_base);
 627
 628         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 629
 630         return dongle_id;
 631 }
 632
 633 /*
 634  * Function ali_ircc_interrupt (irq, dev_id, regs)
 635  *
 636  *    An interrupt from the chip has arrived. Time to do some work
 637  *
 638  */
 639 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id,
 640                                         struct pt_regs *regs)
 641 {
 642         struct net_device *dev = (struct net_device *) dev_id;
 643         struct ali_ircc_cb *self;
 644         int ret;
 645
 646         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 647
 648         if (!dev) {
 649                 IRDA_WARNING("%s: irq %d for unknown device.\n", driver_name, irq);
 650                 return IRQ_NONE;
 651         }
 652
 653         self = (struct ali_ircc_cb *) dev->priv;
 654
 655         spin_lock(&self->lock);
 656
 657         /* Dispatch interrupt handler for the current speed */
 658         if (self->io.speed > 115200)
 659                 ret = ali_ircc_fir_interrupt(self);
 660         else
 661                 ret = ali_ircc_sir_interrupt(self);
 662
 663         spin_unlock(&self->lock);
 664
 665         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 666         return ret;
 667 }
 668 /*
 669  * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
 670  *
 671  *    Handle MIR/FIR interrupt
 672  *
 673  */
 674 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
 675 {
 676         __u8 eir, OldMessageCount;
 677         int iobase, tmp;
 678
 679         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 680
 681         iobase = self->io.fir_base;
 682
 683         switch_bank(iobase, BANK0);
 684         self->InterruptID = inb(iobase+FIR_IIR);
 685         self->BusStatus = inb(iobase+FIR_BSR);
 686
 687         OldMessageCount = (self->LineStatus + 1) & 0x07;
 688         self->LineStatus = inb(iobase+FIR_LSR);
 689         //self->ier = inb(iobase+FIR_IER);              2000/12/1 04:32PM
 690         eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
 691
 692         IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
 693         IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
 694         IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
 695         IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
 696
 697         /* Disable interrupts */
 698          SetCOMInterrupts(self, FALSE);
 699
 700         /* Tx or Rx Interrupt */
 701
 702         if (eir & IIR_EOM)
 703         {
 704                 if (self->io.direction == IO_XMIT) /* TX */
 705                 {
 706                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
 707
 708                         if(ali_ircc_dma_xmit_complete(self))
 709                         {
 710                                 if (irda_device_txqueue_empty(self->netdev))
 711                                 {
 712                                         /* Prepare for receive */
 713                                         ali_ircc_dma_receive(self);
 714                                         self->ier = IER_EOM;
 715                                 }
 716                         }
 717                         else
 718                         {
 719                                 self->ier = IER_EOM;
 720                         }
 721
 722                 }
 723                 else /* RX */
 724                 {
 725                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
 726
 727                         if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 728                         {
 729                                 self->rcvFramesOverflow = TRUE;
 730                                 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
 731                         }
 732
 733                         if (ali_ircc_dma_receive_complete(self))
 734                         {
 735                                 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
 736
 737                                 self->ier = IER_EOM;
 738                         }
 739                         else
 740                         {
 741                                 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
 742
 743                                 self->ier = IER_EOM | IER_TIMER;
 744                         }
 745
 746                 }
 747         }
 748         /* Timer Interrupt */
 749         else if (eir & IIR_TIMER)
 750         {
 751                 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 752                 {
 753                         self->rcvFramesOverflow = TRUE;
 754                         IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
 755                 }
 756                 /* Disable Timer */
 757                 switch_bank(iobase, BANK1);
 758                 tmp = inb(iobase+FIR_CR);
 759                 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
 760
 761                 /* Check if this is a Tx timer interrupt */
 762                 if (self->io.direction == IO_XMIT)
 763                 {
 764                         ali_ircc_dma_xmit(self);
 765
 766                         /* Interrupt on EOM */
 767                         self->ier = IER_EOM;
 768
 769                 }
 770                 else /* Rx */
 771                 {
 772                         if(ali_ircc_dma_receive_complete(self))
 773                         {
 774                                 self->ier = IER_EOM;
 775                         }
 776                         else
 777                         {
 778                                 self->ier = IER_EOM | IER_TIMER;
 779                         }
 780                 }
 781         }
 782
 783         /* Restore Interrupt */
 784         SetCOMInterrupts(self, TRUE);
 785
 786         IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
 787         return IRQ_RETVAL(eir);
 788 }
 789
 790 /*
 791  * Function ali_ircc_sir_interrupt (irq, self, eir)
 792  *
 793  *    Handle SIR interrupt
 794  *
 795  */
 796 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
 797 {
 798         int iobase;
 799         int iir, lsr;
 800
 801         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 802
 803         iobase = self->io.sir_base;
 804
 805         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
 806         if (iir) {
 807                 /* Clear interrupt */
 808                 lsr = inb(iobase+UART_LSR);
 809
 810                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__,
 811                            iir, lsr, iobase);
 812
 813                 switch (iir)
 814                 {
 815                         case UART_IIR_RLSI:
 816                                 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
 817                                 break;
 818                         case UART_IIR_RDI:
 819                                 /* Receive interrupt */
 820                                 ali_ircc_sir_receive(self);
 821                                 break;
 822                         case UART_IIR_THRI:
 823                                 if (lsr & UART_LSR_THRE)
 824                                 {
 825                                         /* Transmitter ready for data */
 826                                         ali_ircc_sir_write_wakeup(self);
 827                                 }
 828                                 break;
 829                         default:
 830                                 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
 831                                 break;
 832                 }
 833
 834         }
 835
 836
 837         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 838
 839         return IRQ_RETVAL(iir);
 840 }
 841
 842
 843 /*
 844  * Function ali_ircc_sir_receive (self)
 845  *
 846  *    Receive one frame from the infrared port
 847  *
 848  */
 849 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
 850 {
 851         int boguscount = 0;
 852         int iobase;
 853
 854         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 855         IRDA_ASSERT(self != NULL, return;);
 856
 857         iobase = self->io.sir_base;
 858
 859         /*
 860          * Receive all characters in Rx FIFO, unwrap and unstuff them.
 861          * async_unwrap_char will deliver all found frames
 862          */
 863         do {
 864                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
 865                                   inb(iobase+UART_RX));
 866
 867                 /* Make sure we don't stay here too long */
 868                 if (boguscount++ > 32) {
 869                         IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
 870                         break;
 871                 }
 872         } while (inb(iobase+UART_LSR) & UART_LSR_DR);
 873
 874         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 875 }
 876
 877 /*
 878  * Function ali_ircc_sir_write_wakeup (tty)
 879  *
 880  *    Called by the driver when there's room for more data.  If we have
 881  *    more packets to send, we send them here.
 882  *
 883  */
 884 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
 885 {
 886         int actual = 0;
 887         int iobase;
 888
 889         IRDA_ASSERT(self != NULL, return;);
 890
 891         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 892
 893         iobase = self->io.sir_base;
 894
 895         /* Finished with frame?  */
 896         if (self->tx_buff.len > 0)
 897         {
 898                 /* Write data left in transmit buffer */
 899                 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
 900                                       self->tx_buff.data, self->tx_buff.len);
 901                 self->tx_buff.data += actual;
 902                 self->tx_buff.len  -= actual;
 903         }
 904         else
 905         {
 906                 if (self->new_speed)
 907                 {
 908                         /* We must wait until all data are gone */
 909                         while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
 910                                 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
 911
 912                         IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
 913                         ali_ircc_change_speed(self, self->new_speed);
 914                         self->new_speed = 0;
 915
 916                         // benjamin 2000/11/10 06:32PM
 917                         if (self->io.speed > 115200)
 918                         {
 919                                 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );
 920
 921                                 self->ier = IER_EOM;
 922                                 // SetCOMInterrupts(self, TRUE);
 923                                 return;
 924                         }
 925                 }
 926                 else
 927                 {
 928                         netif_wake_queue(self->netdev);
 929                 }
 930
 931                 self->stats.tx_packets++;
 932
 933                 /* Turn on receive interrupts */
 934                 outb(UART_IER_RDI, iobase+UART_IER);
 935         }
 936
 937         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 938 }
 939
 940 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
 941 {
 942         struct net_device *dev = self->netdev;
 943         int iobase;
 944
 945         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 946
 947         IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
 948
 949         /* This function *must* be called with irq off and spin-lock.
 950          * - Jean II */
 951
 952         iobase = self->io.fir_base;
 953
 954         SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
 955
 956         /* Go to MIR, FIR Speed */
 957         if (baud > 115200)
 958         {
 959
 960
 961                 ali_ircc_fir_change_speed(self, baud);
 962
 963                 /* Install FIR xmit handler*/
 964                 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;
 965
 966                 /* Enable Interuupt */
 967                 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
 968
 969                 /* Be ready for incomming frames */
 970                 ali_ircc_dma_receive(self);     // benajmin 2000/11/8 07:46PM not complete
 971         }
 972         /* Go to SIR Speed */
 973         else
 974         {
 975                 ali_ircc_sir_change_speed(self, baud);
 976
 977                 /* Install SIR xmit handler*/
 978                 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
 979         }
 980
 981
 982         SetCOMInterrupts(self, TRUE);   // 2000/11/24 11:43AM
 983
 984         netif_wake_queue(self->netdev);
 985
 986         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 987 }
 988
 989 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
 990 {
 991
 992         int iobase;
 993         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
 994         struct net_device *dev;
 995
 996         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 997
 998         IRDA_ASSERT(self != NULL, return;);
 999
1000         dev = self->netdev;
1001         iobase = self->io.fir_base;
1002
1003         IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1004
1005         /* Come from SIR speed */
1006         if(self->io.speed <=115200)
1007         {
1008                 SIR2FIR(iobase);
1009         }
1010
1011         /* Update accounting for new speed */
1012         self->io.speed = baud;
1013
1014         // Set Dongle Speed mode
1015         ali_ircc_change_dongle_speed(self, baud);
1016
1017         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1018 }
1019
1020 /*
1021  * Function ali_sir_change_speed (self, speed)
1022  *
1023  *    Set speed of IrDA port to specified baudrate
1024  *
1025  */
1026 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1027 {
1028         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1029         unsigned long flags;
1030         int iobase;
1031         int fcr;    /* FIFO control reg */
1032         int lcr;    /* Line control reg */
1033         int divisor;
1034
1035         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1036
1037         IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1038
1039         IRDA_ASSERT(self != NULL, return;);
1040
1041         iobase = self->io.sir_base;
1042
1043         /* Come from MIR or FIR speed */
1044         if(self->io.speed >115200)
1045         {
1046                 // Set Dongle Speed mode first
1047                 ali_ircc_change_dongle_speed(self, speed);
1048
1049                 FIR2SIR(iobase);
1050         }
1051
1052         // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1053
1054         inb(iobase+UART_LSR);
1055         inb(iobase+UART_SCR);
1056
1057         /* Update accounting for new speed */
1058         self->io.speed = speed;
1059
1060         spin_lock_irqsave(&self->lock, flags);
1061
1062         divisor = 115200/speed;
1063
1064         fcr = UART_FCR_ENABLE_FIFO;
1065
1066         /*
1067          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1068          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1069          * about this timeout since it will always be fast enough.
1070          */
1071         if (self->io.speed < 38400)
1072                 fcr |= UART_FCR_TRIGGER_1;
1073         else
1074                 fcr |= UART_FCR_TRIGGER_14;
1075
1076         /* IrDA ports use 8N1 */
1077         lcr = UART_LCR_WLEN8;
1078
1079         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1080         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1081         outb(divisor >> 8,        iobase+UART_DLM);
1082         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1083         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1084
1085         /* without this, the conection will be broken after come back from FIR speed,
1086            but with this, the SIR connection is harder to established */
1087         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1088
1089         spin_unlock_irqrestore(&self->lock, flags);
1090
1091         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1092 }
1093
1094 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1095 {
1096
1097         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1098         int iobase,dongle_id;
1099         int tmp = 0;
1100
1101         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1102
1103         iobase = self->io.fir_base;     /* or iobase = self->io.sir_base; */
1104         dongle_id = self->io.dongle_id;
1105
1106         /* We are already locked, no need to do it again */
1107
1108         IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);
1109
1110         switch_bank(iobase, BANK2);
1111         tmp = inb(iobase+FIR_IRDA_CR);
1112
1113         /* IBM type dongle */
1114         if(dongle_id == 0)
1115         {
1116                 if(speed == 4000000)
1117                 {
1118                         //            __ __
1119                         // SD/MODE __|     |__ __
1120                         //               __ __
1121                         // IRTX    __ __|     |__
1122                         //         T1 T2 T3 T4 T5
1123
1124                         tmp &=  ~IRDA_CR_HDLC;          // HDLC=0
1125                         tmp |= IRDA_CR_CRC;             // CRC=1
1126
1127                         switch_bank(iobase, BANK2);
1128                         outb(tmp, iobase+FIR_IRDA_CR);
1129
1130                         // T1 -> SD/MODE:0 IRTX:0
1131                         tmp &= ~0x09;
1132                         tmp |= 0x02;
1133                         outb(tmp, iobase+FIR_IRDA_CR);
1134                         udelay(2);
1135
1136                         // T2 -> SD/MODE:1 IRTX:0
1137                         tmp &= ~0x01;
1138                         tmp |= 0x0a;
1139                         outb(tmp, iobase+FIR_IRDA_CR);
1140                         udelay(2);
1141
1142                         // T3 -> SD/MODE:1 IRTX:1
1143                         tmp |= 0x0b;
1144                         outb(tmp, iobase+FIR_IRDA_CR);
1145                         udelay(2);
1146
1147                         // T4 -> SD/MODE:0 IRTX:1
1148                         tmp &= ~0x08;
1149                         tmp |= 0x03;
1150                         outb(tmp, iobase+FIR_IRDA_CR);
1151                         udelay(2);
1152
1153                         // T5 -> SD/MODE:0 IRTX:0
1154                         tmp &= ~0x09;
1155                         tmp |= 0x02;
1156                         outb(tmp, iobase+FIR_IRDA_CR);
1157                         udelay(2);
1158
1159                         // reset -> Normal TX output Signal
1160                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1161                 }
1162                 else /* speed <=1152000 */
1163                 {
1164                         //            __
1165                         // SD/MODE __|  |__
1166                         //
1167                         // IRTX    ________
1168                         //         T1 T2 T3
1169
1170                         /* MIR 115200, 57600 */
1171                         if (speed==1152000)
1172                         {
1173                                 tmp |= 0xA0;       //HDLC=1, 1.152Mbps=1
1174                         }
1175                         else
1176                         {
1177                                 tmp &=~0x80;       //HDLC 0.576Mbps
1178                                 tmp |= 0x20;       //HDLC=1,
1179                         }
1180
1181                         tmp |= IRDA_CR_CRC;             // CRC=1
1182
1183                         switch_bank(iobase, BANK2);
1184                         outb(tmp, iobase+FIR_IRDA_CR);
1185
1186                         /* MIR 115200, 57600 */
1187
1188                         //switch_bank(iobase, BANK2);
1189                         // T1 -> SD/MODE:0 IRTX:0
1190                         tmp &= ~0x09;
1191                         tmp |= 0x02;
1192                         outb(tmp, iobase+FIR_IRDA_CR);
1193                         udelay(2);
1194
1195                         // T2 -> SD/MODE:1 IRTX:0
1196                         tmp &= ~0x01;
1197                         tmp |= 0x0a;
1198                         outb(tmp, iobase+FIR_IRDA_CR);
1199
1200                         // T3 -> SD/MODE:0 IRTX:0
1201                         tmp &= ~0x09;
1202                         tmp |= 0x02;
1203                         outb(tmp, iobase+FIR_IRDA_CR);
1204                         udelay(2);
1205
1206                         // reset -> Normal TX output Signal
1207                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1208                 }
1209         }
1210         else if (dongle_id == 1) /* HP HDSL-3600 */
1211         {
1212                 switch(speed)
1213                 {
1214                 case 4000000:
1215                         tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1216                         break;
1217
1218                 case 1152000:
1219                         tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1220                         break;
1221
1222                 case 576000:
1223                         tmp &=~0x80;            // HDLC 0.576Mbps
1224                         tmp |= 0x20;            // HDLC=1,
1225                         break;
1226                 }
1227
1228                 tmp |= IRDA_CR_CRC;             // CRC=1
1229
1230                 switch_bank(iobase, BANK2);
1231                 outb(tmp, iobase+FIR_IRDA_CR);
1232         }
1233         else /* HP HDSL-1100 */
1234         {
1235                 if(speed <= 115200) /* SIR */
1236                 {
1237
1238                         tmp &= ~IRDA_CR_FIR_SIN;        // HP sin select = 0
1239
1240                         switch_bank(iobase, BANK2);
1241                         outb(tmp, iobase+FIR_IRDA_CR);
1242                 }
1243                 else /* MIR FIR */
1244                 {
1245
1246                         switch(speed)
1247                         {
1248                         case 4000000:
1249                                 tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1250                                 break;
1251
1252                         case 1152000:
1253                                 tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1254                                 break;
1255
1256                         case 576000:
1257                                 tmp &=~0x80;            // HDLC 0.576Mbps
1258                                 tmp |= 0x20;            // HDLC=1,
1259                                 break;
1260                         }
1261
1262                         tmp |= IRDA_CR_CRC;             // CRC=1
1263                         tmp |= IRDA_CR_FIR_SIN;         // HP sin select = 1
1264
1265                         switch_bank(iobase, BANK2);
1266                         outb(tmp, iobase+FIR_IRDA_CR);
1267                 }
1268         }
1269
1270         switch_bank(iobase, BANK0);
1271
1272         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1273 }
1274
1275 /*
1276  * Function ali_ircc_sir_write (driver)
1277  *
1278  *    Fill Tx FIFO with transmit data
1279  *
1280  */
1281 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1282 {
1283         int actual = 0;
1284
1285         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1286
1287         /* Tx FIFO should be empty! */
1288         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1289                 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1290                 return 0;
1291         }
1292
1293         /* Fill FIFO with current frame */
1294         while ((fifo_size-- > 0) && (actual < len)) {
1295                 /* Transmit next byte */
1296                 outb(buf[actual], iobase+UART_TX);
1297
1298                 actual++;
1299         }
1300
1301         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1302         return actual;
1303 }
1304
1305 /*
1306  * Function ali_ircc_net_open (dev)
1307  *
1308  *    Start the device
1309  *
1310  */
1311 static int ali_ircc_net_open(struct net_device *dev)
1312 {
1313         struct ali_ircc_cb *self;
1314         int iobase;
1315         char hwname[32];
1316
1317         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1318
1319         IRDA_ASSERT(dev != NULL, return -1;);
1320
1321         self = (struct ali_ircc_cb *) dev->priv;
1322
1323         IRDA_ASSERT(self != NULL, return 0;);
1324
1325         iobase = self->io.fir_base;
1326
1327         /* Request IRQ and install Interrupt Handler */
1328         if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1329         {
1330                 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1331                              self->io.irq);
1332                 return -EAGAIN;
1333         }
1334
1335         /*
1336          * Always allocate the DMA channel after the IRQ, and clean up on
1337          * failure.
1338          */
1339         if (request_dma(self->io.dma, dev->name)) {
1340                 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1341                              self->io.dma);
1342                 free_irq(self->io.irq, self);
1343                 return -EAGAIN;
1344         }
1345
1346         /* Turn on interrups */
1347         outb(UART_IER_RDI , iobase+UART_IER);
1348
1349         /* Ready to play! */
1350         netif_start_queue(dev); //benjamin by irport
1351
1352         /* Give self a hardware name */
1353         sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1354
1355         /*
1356          * Open new IrLAP layer instance, now that everything should be
1357          * initialized properly
1358          */
1359         self->irlap = irlap_open(dev, &self->qos, hwname);
1360
1361         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1362
1363         return 0;
1364 }
1365
1366 /*
1367  * Function ali_ircc_net_close (dev)
1368  *
1369  *    Stop the device
1370  *
1371  */
1372 static int ali_ircc_net_close(struct net_device *dev)
1373 {
1374
1375         struct ali_ircc_cb *self;
1376         //int iobase;
1377
1378         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1379
1380         IRDA_ASSERT(dev != NULL, return -1;);
1381
1382         self = (struct ali_ircc_cb *) dev->priv;
1383         IRDA_ASSERT(self != NULL, return 0;);
1384
1385         /* Stop device */
1386         netif_stop_queue(dev);
1387
1388         /* Stop and remove instance of IrLAP */
1389         if (self->irlap)
1390                 irlap_close(self->irlap);
1391         self->irlap = NULL;
1392
1393         disable_dma(self->io.dma);
1394
1395         /* Disable interrupts */
1396         SetCOMInterrupts(self, FALSE);
1397
1398         free_irq(self->io.irq, dev);
1399         free_dma(self->io.dma);
1400
1401         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1402
1403         return 0;
1404 }
1405
1406 /*
1407  * Function ali_ircc_fir_hard_xmit (skb, dev)
1408  *
1409  *    Transmit the frame
1410  *
1411  */
1412 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1413 {
1414         struct ali_ircc_cb *self;
1415         unsigned long flags;
1416         int iobase;
1417         __u32 speed;
1418         int mtt, diff;
1419
1420         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1421
1422         self = (struct ali_ircc_cb *) dev->priv;
1423         iobase = self->io.fir_base;
1424
1425         netif_stop_queue(dev);
1426
1427         /* Make sure tests *& speed change are atomic */
1428         spin_lock_irqsave(&self->lock, flags);
1429
1430         /* Note : you should make sure that speed changes are not going
1431          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1432          * details - Jean II */
1433
1434         /* Check if we need to change the speed */
1435         speed = irda_get_next_speed(skb);
1436         if ((speed != self->io.speed) && (speed != -1)) {
1437                 /* Check for empty frame */
1438                 if (!skb->len) {
1439                         ali_ircc_change_speed(self, speed);
1440                         dev->trans_start = jiffies;
1441                         spin_unlock_irqrestore(&self->lock, flags);
1442                         dev_kfree_skb(skb);
1443                         return 0;
1444                 } else
1445                         self->new_speed = speed;
1446         }
1447
1448         /* Register and copy this frame to DMA memory */
1449         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1450         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1451         self->tx_fifo.tail += skb->len;
1452
1453         self->stats.tx_bytes += skb->len;
1454
1455         memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
1456                skb->len);
1457
1458         self->tx_fifo.len++;
1459         self->tx_fifo.free++;
1460
1461         /* Start transmit only if there is currently no transmit going on */
1462         if (self->tx_fifo.len == 1)
1463         {
1464                 /* Check if we must wait the min turn time or not */
1465                 mtt = irda_get_mtt(skb);
1466
1467                 if (mtt)
1468                 {
1469                         /* Check how much time we have used already */
1470                         do_gettimeofday(&self->now);
1471
1472                         diff = self->now.tv_usec - self->stamp.tv_usec;
1473                         /* self->stamp is set from ali_ircc_dma_receive_complete() */
1474
1475                         IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);
1476
1477                         if (diff < 0)
1478                                 diff += 1000000;
1479
1480                         /* Check if the mtt is larger than the time we have
1481                          * already used by all the protocol processing
1482                          */
1483                         if (mtt > diff)
1484                         {
1485                                 mtt -= diff;
1486
1487                                 /*
1488                                  * Use timer if delay larger than 1000 us, and
1489                                  * use udelay for smaller values which should
1490                                  * be acceptable
1491                                  */
1492                                 if (mtt > 500)
1493                                 {
1494                                         /* Adjust for timer resolution */
1495                                         mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
1496
1497                                         IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);
1498
1499                                         /* Setup timer */
1500                                         if (mtt == 1) /* 500 us */
1501                                         {
1502                                                 switch_bank(iobase, BANK1);
1503                                                 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1504                                         }
1505                                         else if (mtt == 2) /* 1 ms */
1506                                         {
1507                                                 switch_bank(iobase, BANK1);
1508                                                 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1509                                         }
1510                                         else /* > 2ms -> 4ms */
1511                                         {
1512                                                 switch_bank(iobase, BANK1);
1513                                                 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1514                                         }
1515
1516
1517                                         /* Start timer */
1518                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1519                                         self->io.direction = IO_XMIT;
1520
1521                                         /* Enable timer interrupt */
1522                                         self->ier = IER_TIMER;
1523                                         SetCOMInterrupts(self, TRUE);
1524
1525                                         /* Timer will take care of the rest */
1526                                         goto out;
1527                                 }
1528                                 else
1529                                         udelay(mtt);
1530                         } // if (if (mtt > diff)
1531                 }// if (mtt)
1532
1533                 /* Enable EOM interrupt */
1534                 self->ier = IER_EOM;
1535                 SetCOMInterrupts(self, TRUE);
1536
1537                 /* Transmit frame */
1538                 ali_ircc_dma_xmit(self);
1539         } // if (self->tx_fifo.len == 1)
1540
1541  out:
1542
1543         /* Not busy transmitting anymore if window is not full */
1544         if (self->tx_fifo.free < MAX_TX_WINDOW)
1545                 netif_wake_queue(self->netdev);
1546
1547         /* Restore bank register */
1548         switch_bank(iobase, BANK0);
1549
1550         dev->trans_start = jiffies;
1551         spin_unlock_irqrestore(&self->lock, flags);
1552         dev_kfree_skb(skb);
1553
1554         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1555         return 0;
1556 }
1557
1558
1559 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1560 {
1561         int iobase, tmp;
1562         unsigned char FIFO_OPTI, Hi, Lo;
1563
1564
1565         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1566
1567         iobase = self->io.fir_base;
1568
1569         /* FIFO threshold , this method comes from NDIS5 code */
1570
1571         if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1572                 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1573         else
1574                 FIFO_OPTI = TX_FIFO_Threshold;
1575
1576         /* Disable DMA */
1577         switch_bank(iobase, BANK1);
1578         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1579
1580         self->io.direction = IO_XMIT;
1581
1582         irda_setup_dma(self->io.dma,
1583                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1584                         self->tx_buff.head) + self->tx_buff_dma,
1585                        self->tx_fifo.queue[self->tx_fifo.ptr].len,
1586                        DMA_TX_MODE);
1587
1588         /* Reset Tx FIFO */
1589         switch_bank(iobase, BANK0);
1590         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1591
1592         /* Set Tx FIFO threshold */
1593         if (self->fifo_opti_buf!=FIFO_OPTI)
1594         {
1595                 switch_bank(iobase, BANK1);
1596                 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1597                 self->fifo_opti_buf=FIFO_OPTI;
1598         }
1599
1600         /* Set Tx DMA threshold */
1601         switch_bank(iobase, BANK1);
1602         outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1603
1604         /* Set max Tx frame size */
1605         Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1606         Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1607         switch_bank(iobase, BANK2);
1608         outb(Hi, iobase+FIR_TX_DSR_HI);
1609         outb(Lo, iobase+FIR_TX_DSR_LO);
1610
1611         /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1612         switch_bank(iobase, BANK0);
1613         tmp = inb(iobase+FIR_LCR_B);
1614         tmp &= ~0x20; // Disable SIP
1615         outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1616         IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1617
1618         outb(0, iobase+FIR_LSR);
1619
1620         /* Enable DMA and Burst Mode */
1621         switch_bank(iobase, BANK1);
1622         outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1623
1624         switch_bank(iobase, BANK0);
1625
1626         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1627 }
1628
1629 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1630 {
1631         int iobase;
1632         int ret = TRUE;
1633
1634         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1635
1636         iobase = self->io.fir_base;
1637
1638         /* Disable DMA */
1639         switch_bank(iobase, BANK1);
1640         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1641
1642         /* Check for underrun! */
1643         switch_bank(iobase, BANK0);
1644         if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1645
1646         {
1647                 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);
1648                 self->stats.tx_errors++;
1649                 self->stats.tx_fifo_errors++;
1650         }
1651         else
1652         {
1653                 self->stats.tx_packets++;
1654         }
1655
1656         /* Check if we need to change the speed */
1657         if (self->new_speed)
1658         {
1659                 ali_ircc_change_speed(self, self->new_speed);
1660                 self->new_speed = 0;
1661         }
1662
1663         /* Finished with this frame, so prepare for next */
1664         self->tx_fifo.ptr++;
1665         self->tx_fifo.len--;
1666
1667         /* Any frames to be sent back-to-back? */
1668         if (self->tx_fifo.len)
1669         {
1670                 ali_ircc_dma_xmit(self);
1671
1672                 /* Not finished yet! */
1673                 ret = FALSE;
1674         }
1675         else
1676         {       /* Reset Tx FIFO info */
1677                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1678                 self->tx_fifo.tail = self->tx_buff.head;
1679         }
1680
1681         /* Make sure we have room for more frames */
1682         if (self->tx_fifo.free < MAX_TX_WINDOW) {
1683                 /* Not busy transmitting anymore */
1684                 /* Tell the network layer, that we can accept more frames */
1685                 netif_wake_queue(self->netdev);
1686         }
1687
1688         switch_bank(iobase, BANK0);
1689
1690         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1691         return ret;
1692 }
1693
1694 /*
1695  * Function ali_ircc_dma_receive (self)
1696  *
1697  *    Get ready for receiving a frame. The device will initiate a DMA
1698  *    if it starts to receive a frame.
1699  *
1700  */
1701 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1702 {
1703         int iobase, tmp;
1704
1705         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1706
1707         iobase = self->io.fir_base;
1708
1709         /* Reset Tx FIFO info */
1710         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1711         self->tx_fifo.tail = self->tx_buff.head;
1712
1713         /* Disable DMA */
1714         switch_bank(iobase, BANK1);
1715         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1716
1717         /* Reset Message Count */
1718         switch_bank(iobase, BANK0);
1719         outb(0x07, iobase+FIR_LSR);
1720
1721         self->rcvFramesOverflow = FALSE;
1722
1723         self->LineStatus = inb(iobase+FIR_LSR) ;
1724
1725         /* Reset Rx FIFO info */
1726         self->io.direction = IO_RECV;
1727         self->rx_buff.data = self->rx_buff.head;
1728
1729         /* Reset Rx FIFO */
1730         // switch_bank(iobase, BANK0);
1731         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1732
1733         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1734         self->st_fifo.tail = self->st_fifo.head = 0;
1735
1736         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1737                        DMA_RX_MODE);
1738
1739         /* Set Receive Mode,Brick Wall */
1740         //switch_bank(iobase, BANK0);
1741         tmp = inb(iobase+FIR_LCR_B);
1742         outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1743         IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1744
1745         /* Set Rx Threshold */
1746         switch_bank(iobase, BANK1);
1747         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1748         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1749
1750         /* Enable DMA and Burst Mode */
1751         // switch_bank(iobase, BANK1);
1752         outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1753
1754         switch_bank(iobase, BANK0);
1755         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1756         return 0;
1757 }
1758
1759 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1760 {
1761         struct st_fifo *st_fifo;
1762         struct sk_buff *skb;
1763         __u8 status, MessageCount;
1764         int len, i, iobase, val;
1765
1766         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1767
1768         st_fifo = &self->st_fifo;
1769         iobase = self->io.fir_base;
1770
1771         switch_bank(iobase, BANK0);
1772         MessageCount = inb(iobase+ FIR_LSR)&0x07;
1773
1774         if (MessageCount > 0)
1775                 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);
1776
1777         for (i=0; i<=MessageCount; i++)
1778         {
1779                 /* Bank 0 */
1780                 switch_bank(iobase, BANK0);
1781                 status = inb(iobase+FIR_LSR);
1782
1783                 switch_bank(iobase, BANK2);
1784                 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1785                 len = len << 8;
1786                 len |= inb(iobase+FIR_RX_DSR_LO);
1787
1788                 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);
1789                 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1790
1791                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1792                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1793                         continue;
1794                 }
1795
1796                 st_fifo->entries[st_fifo->tail].status = status;
1797                 st_fifo->entries[st_fifo->tail].len = len;
1798                 st_fifo->pending_bytes += len;
1799                 st_fifo->tail++;
1800                 st_fifo->len++;
1801         }
1802
1803         for (i=0; i<=MessageCount; i++)
1804         {
1805                 /* Get first entry */
1806                 status = st_fifo->entries[st_fifo->head].status;
1807                 len    = st_fifo->entries[st_fifo->head].len;
1808                 st_fifo->pending_bytes -= len;
1809                 st_fifo->head++;
1810                 st_fifo->len--;
1811
1812                 /* Check for errors */
1813                 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1814                 {
1815                         IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );
1816
1817                         /* Skip frame */
1818                         self->stats.rx_errors++;
1819
1820                         self->rx_buff.data += len;
1821
1822                         if (status & LSR_FIFO_UR)
1823                         {
1824                                 self->stats.rx_frame_errors++;
1825                                 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1826                         }
1827                         if (status & LSR_FRAME_ERROR)
1828                         {
1829                                 self->stats.rx_frame_errors++;
1830                                 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1831                         }
1832
1833                         if (status & LSR_CRC_ERROR)
1834                         {
1835                                 self->stats.rx_crc_errors++;
1836                                 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1837                         }
1838
1839                         if(self->rcvFramesOverflow)
1840                         {
1841                                 self->stats.rx_frame_errors++;
1842                                 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );
1843                         }
1844                         if(len == 0)
1845                         {
1846                                 self->stats.rx_frame_errors++;
1847                                 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1848                         }
1849                 }
1850                 else
1851                 {
1852
1853                         if (st_fifo->pending_bytes < 32)
1854                         {
1855                                 switch_bank(iobase, BANK0);
1856                                 val = inb(iobase+FIR_BSR);
1857                                 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1858                                 {
1859                                         IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1860
1861                                         /* Put this entry back in fifo */
1862                                         st_fifo->head--;
1863                                         st_fifo->len++;
1864                                         st_fifo->pending_bytes += len;
1865                                         st_fifo->entries[st_fifo->head].status = status;
1866                                         st_fifo->entries[st_fifo->head].len = len;
1867
1868                                         /*
1869                                         * DMA not finished yet, so try again
1870                                         * later, set timer value, resolution
1871                                         * 500 us
1872                                         */
1873
1874                                         switch_bank(iobase, BANK1);
1875                                         outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1876
1877                                         /* Enable Timer */
1878                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1879
1880                                         return FALSE; /* I'll be back! */
1881                                 }
1882                         }
1883
1884                         /*
1885                          * Remember the time we received this frame, so we can
1886                          * reduce the min turn time a bit since we will know
1887                          * how much time we have used for protocol processing
1888                          */
1889                         do_gettimeofday(&self->stamp);
1890
1891                         skb = dev_alloc_skb(len+1);
1892                         if (skb == NULL)
1893                         {
1894                                 IRDA_WARNING("%s(), memory squeeze, "
1895                                              "dropping frame.\n",
1896                                              __FUNCTION__);
1897                                 self->stats.rx_dropped++;
1898
1899                                 return FALSE;
1900                         }
1901
1902                         /* Make sure IP header gets aligned */
1903                         skb_reserve(skb, 1);
1904
1905                         /* Copy frame without CRC, CRC is removed by hardware*/
1906                         skb_put(skb, len);
1907                         memcpy(skb->data, self->rx_buff.data, len);
1908
1909                         /* Move to next frame */
1910                         self->rx_buff.data += len;
1911                         self->stats.rx_bytes += len;
1912                         self->stats.rx_packets++;
1913
1914                         skb->dev = self->netdev;
1915                         skb->mac.raw  = skb->data;
1916                         skb->protocol = htons(ETH_P_IRDA);
1917                         netif_rx(skb);
1918                         self->netdev->last_rx = jiffies;
1919                 }
1920         }
1921
1922         switch_bank(iobase, BANK0);
1923
1924         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1925         return TRUE;
1926 }
1927
1928
1929
1930 /*
1931  * Function ali_ircc_sir_hard_xmit (skb, dev)
1932  *
1933  *    Transmit the frame!
1934  *
1935  */
1936 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1937 {
1938         struct ali_ircc_cb *self;
1939         unsigned long flags;
1940         int iobase;
1941         __u32 speed;
1942
1943         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1944
1945         IRDA_ASSERT(dev != NULL, return 0;);
1946
1947         self = (struct ali_ircc_cb *) dev->priv;
1948         IRDA_ASSERT(self != NULL, return 0;);
1949
1950         iobase = self->io.sir_base;
1951
1952         netif_stop_queue(dev);
1953
1954         /* Make sure tests *& speed change are atomic */
1955         spin_lock_irqsave(&self->lock, flags);
1956
1957         /* Note : you should make sure that speed changes are not going
1958          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1959          * details - Jean II */
1960
1961         /* Check if we need to change the speed */
1962         speed = irda_get_next_speed(skb);
1963         if ((speed != self->io.speed) && (speed != -1)) {
1964                 /* Check for empty frame */
1965                 if (!skb->len) {
1966                         ali_ircc_change_speed(self, speed);
1967                         dev->trans_start = jiffies;
1968                         spin_unlock_irqrestore(&self->lock, flags);
1969                         dev_kfree_skb(skb);
1970                         return 0;
1971                 } else
1972                         self->new_speed = speed;
1973         }
1974
1975         /* Init tx buffer */
1976         self->tx_buff.data = self->tx_buff.head;
1977
1978         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
1979         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1980                                            self->tx_buff.truesize);
1981
1982         self->stats.tx_bytes += self->tx_buff.len;
1983
1984         /* Turn on transmit finished interrupt. Will fire immediately!  */
1985         outb(UART_IER_THRI, iobase+UART_IER);
1986
1987         dev->trans_start = jiffies;
1988         spin_unlock_irqrestore(&self->lock, flags);
1989
1990         dev_kfree_skb(skb);
1991
1992         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1993
1994         return 0;
1995 }
1996
1997
1998 /*
1999  * Function ali_ircc_net_ioctl (dev, rq, cmd)
2000  *
2001  *    Process IOCTL commands for this device
2002  *
2003  */
2004 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2005 {
2006         struct if_irda_req *irq = (struct if_irda_req *) rq;
2007         struct ali_ircc_cb *self;
2008         unsigned long flags;
2009         int ret = 0;
2010
2011         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2012
2013         IRDA_ASSERT(dev != NULL, return -1;);
2014
2015         self = dev->priv;
2016
2017         IRDA_ASSERT(self != NULL, return -1;);
2018
2019         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2020
2021         switch (cmd) {
2022         case SIOCSBANDWIDTH: /* Set bandwidth */
2023                 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2024                 /*
2025                  * This function will also be used by IrLAP to change the
2026                  * speed, so we still must allow for speed change within
2027                  * interrupt context.
2028                  */
2029                 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2030                         return -EPERM;
2031
2032                 spin_lock_irqsave(&self->lock, flags);
2033                 ali_ircc_change_speed(self, irq->ifr_baudrate);
2034                 spin_unlock_irqrestore(&self->lock, flags);
2035                 break;
2036         case SIOCSMEDIABUSY: /* Set media busy */
2037                 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2038                 if (!capable(CAP_NET_ADMIN))
2039                         return -EPERM;
2040                 irda_device_set_media_busy(self->netdev, TRUE);
2041                 break;
2042         case SIOCGRECEIVING: /* Check if we are receiving right now */
2043                 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2044                 /* This is protected */
2045                 irq->ifr_receiving = ali_ircc_is_receiving(self);
2046                 break;
2047         default:
2048                 ret = -EOPNOTSUPP;
2049         }
2050
2051         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2052
2053         return ret;
2054 }
2055
2056 /*
2057  * Function ali_ircc_is_receiving (self)
2058  *
2059  *    Return TRUE is we are currently receiving a frame
2060  *
2061  */
2062 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2063 {
2064         unsigned long flags;
2065         int status = FALSE;
2066         int iobase;
2067
2068         IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2069
2070         IRDA_ASSERT(self != NULL, return FALSE;);
2071
2072         spin_lock_irqsave(&self->lock, flags);
2073
2074         if (self->io.speed > 115200)
2075         {
2076                 iobase = self->io.fir_base;
2077
2078                 switch_bank(iobase, BANK1);
2079                 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2080                 {
2081                         /* We are receiving something */
2082                         IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2083                         status = TRUE;
2084                 }
2085                 switch_bank(iobase, BANK0);
2086         }
2087         else
2088         {
2089                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2090         }
2091
2092         spin_unlock_irqrestore(&self->lock, flags);
2093
2094         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2095
2096         return status;
2097 }
2098
2099 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2100 {
2101         struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2102
2103         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2104
2105         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2106
2107         return &self->stats;
2108 }
2109
2110 static void ali_ircc_suspend(struct ali_ircc_cb *self)
2111 {
2112         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2113
2114         IRDA_MESSAGE("%s, Suspending\n", driver_name);
2115
2116         if (self->io.suspended)
2117                 return;
2118
2119         ali_ircc_net_close(self->netdev);
2120
2121         self->io.suspended = 1;
2122
2123         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2124 }
2125
2126 static void ali_ircc_wakeup(struct ali_ircc_cb *self)
2127 {
2128         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2129
2130         if (!self->io.suspended)
2131                 return;
2132
2133         ali_ircc_net_open(self->netdev);
2134
2135         IRDA_MESSAGE("%s, Waking up\n", driver_name);
2136
2137         self->io.suspended = 0;
2138
2139         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2140 }
2141
2142 static int ali_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
2143 {
2144         struct ali_ircc_cb *self = (struct ali_ircc_cb*) dev->data;
2145
2146         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2147
2148         if (self) {
2149                 switch (rqst) {
2150                 case PM_SUSPEND:
2151                         ali_ircc_suspend(self);
2152                         break;
2153                 case PM_RESUME:
2154                         ali_ircc_wakeup(self);
2155                         break;
2156                 }
2157         }
2158
2159         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2160
2161         return 0;
2162 }
2163
2164
2165 /* ALi Chip Function */
2166
2167 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2168 {
2169
2170         unsigned char newMask;
2171
2172         int iobase = self->io.fir_base; /* or sir_base */
2173
2174         IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);
2175
2176         /* Enable the interrupt which we wish to */
2177         if (enable){
2178                 if (self->io.direction == IO_XMIT)
2179                 {
2180                         if (self->io.speed > 115200) /* FIR, MIR */
2181                         {
2182                                 newMask = self->ier;
2183                         }
2184                         else /* SIR */
2185                         {
2186                                 newMask = UART_IER_THRI | UART_IER_RDI;
2187                         }
2188                 }
2189                 else {
2190                         if (self->io.speed > 115200) /* FIR, MIR */
2191                         {
2192                                 newMask = self->ier;
2193                         }
2194                         else /* SIR */
2195                         {
2196                                 newMask = UART_IER_RDI;
2197                         }
2198                 }
2199         }
2200         else /* Disable all the interrupts */
2201         {
2202                 newMask = 0x00;
2203
2204         }
2205
2206         //SIR and FIR has different registers
2207         if (self->io.speed > 115200)
2208         {
2209                 switch_bank(iobase, BANK0);
2210                 outb(newMask, iobase+FIR_IER);
2211         }
2212         else
2213                 outb(newMask, iobase+UART_IER);
2214
2215         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2216 }
2217
2218 static void SIR2FIR(int iobase)
2219 {
2220         //unsigned char tmp;
2221
2222         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2223
2224         /* Already protected (change_speed() or setup()), no need to lock.
2225          * Jean II */
2226
2227         outb(0x28, iobase+UART_MCR);
2228         outb(0x68, iobase+UART_MCR);
2229         outb(0x88, iobase+UART_MCR);
2230
2231         outb(0x60, iobase+FIR_MCR);     /*  Master Reset */
2232         outb(0x20, iobase+FIR_MCR);     /*  Master Interrupt Enable */
2233
2234         //tmp = inb(iobase+FIR_LCR_B);  /* SIP enable */
2235         //tmp |= 0x20;
2236         //outb(tmp, iobase+FIR_LCR_B);
2237
2238         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2239 }
2240
2241 static void FIR2SIR(int iobase)
2242 {
2243         unsigned char val;
2244
2245         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2246
2247         /* Already protected (change_speed() or setup()), no need to lock.
2248          * Jean II */
2249
2250         outb(0x20, iobase+FIR_MCR);     /* IRQ to low */
2251         outb(0x00, iobase+UART_IER);
2252
2253         outb(0xA0, iobase+FIR_MCR);     /* Don't set master reset */
2254         outb(0x00, iobase+UART_FCR);
2255         outb(0x07, iobase+UART_FCR);
2256
2257         val = inb(iobase+UART_RX);
2258         val = inb(iobase+UART_LSR);
2259         val = inb(iobase+UART_MSR);
2260
2261         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2262 }
2263
2264 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2265 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2266 MODULE_LICENSE("GPL");
2267
2268
2269 module_param_array(io, int, NULL, 0);
2270 MODULE_PARM_DESC(io, "Base I/O addresses");
2271 module_param_array(irq, int, NULL, 0);
2272 MODULE_PARM_DESC(irq, "IRQ lines");
2273 module_param_array(dma, int, NULL, 0);
2274 MODULE_PARM_DESC(dma, "DMA channels");
2275
2276 module_init(ali_ircc_init);
2277 module_exit(ali_ircc_cleanup);