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 #include <linux/pm_legacy.h>
  44
  45 #include <net/irda/wrapper.h>
  46 #include <net/irda/irda.h>
  47 #include <net/irda/irda_device.h>
  48
  49 #include "ali-ircc.h"
  50
  51 #define CHIP_IO_EXTENT 8
  52 #define BROKEN_DONGLE_ID
  53
  54 static char *driver_name = "ali-ircc";
  55
  56 /* Module parameters */
  57 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
  58
  59 /* Use BIOS settions by default, but user may supply module parameters */
  60 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
  61 static unsigned int irq[] = { 0, 0, 0, 0 };
  62 static unsigned int dma[] = { 0, 0, 0, 0 };
  63
  64 static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
  65 static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
  66 static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
  67
  68 /* These are the currently known ALi sourth-bridge chipsets, the only one difference
  69  * is that M1543C doesn't support HP HDSL-3600
  70  */
  71 static ali_chip_t chips[] =
  72 {
  73         { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
  74         { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
  75         { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
  76         { NULL }
  77 };
  78
  79 /* Max 4 instances for now */
  80 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
  81
  82 /* Dongle Types */
  83 static char *dongle_types[] = {
  84         "TFDS6000",
  85         "HP HSDL-3600",
  86         "HP HSDL-1100",
  87         "No dongle connected",
  88 };
  89
  90 /* Some prototypes */
  91 static int  ali_ircc_open(int i, chipio_t *info);
  92
  93 static int  ali_ircc_close(struct ali_ircc_cb *self);
  94
  95 static int  ali_ircc_setup(chipio_t *info);
  96 static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
  97 static int  ali_ircc_net_open(struct net_device *dev);
  98 static int  ali_ircc_net_close(struct net_device *dev);
  99 static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 100 static int  ali_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 101 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
 102 static void ali_ircc_suspend(struct ali_ircc_cb *self);
 103 static void ali_ircc_wakeup(struct ali_ircc_cb *self);
 104 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);
 105
 106 /* SIR function */
 107 static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
 108 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
 109 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
 110 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
 111 static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
 112 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
 113
 114 /* FIR function */
 115 static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
 116 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
 117 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
 118 static int  ali_ircc_dma_receive(struct ali_ircc_cb *self);
 119 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
 120 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
 121 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
 122
 123 /* My Function */
 124 static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
 125 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
 126
 127 /* ALi chip function */
 128 static void SIR2FIR(int iobase);
 129 static void FIR2SIR(int iobase);
 130 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
 131
 132 /*
 133  * Function ali_ircc_init ()
 134  *
 135  *    Initialize chip. Find out whay kinds of chips we are dealing with
 136  *    and their configuation registers address
 137  */
 138 static int __init ali_ircc_init(void)
 139 {
 140         ali_chip_t *chip;
 141         chipio_t info;
 142         int ret = -ENODEV;
 143         int cfg, cfg_base;
 144         int reg, revision;
 145         int i = 0;
 146
 147         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 148
 149         /* Probe for all the ALi chipsets we know about */
 150         for (chip= chips; chip->name; chip++, i++)
 151         {
 152                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
 153
 154                 /* Try all config registers for this chip */
 155                 for (cfg=0; cfg<2; cfg++)
 156                 {
 157                         cfg_base = chip->cfg[cfg];
 158                         if (!cfg_base)
 159                                 continue;
 160
 161                         memset(&info, 0, sizeof(chipio_t));
 162                         info.cfg_base = cfg_base;
 163                         info.fir_base = io[i];
 164                         info.dma = dma[i];
 165                         info.irq = irq[i];
 166
 167
 168                         /* Enter Configuration */
 169                         outb(chip->entr1, cfg_base);
 170                         outb(chip->entr2, cfg_base);
 171
 172                         /* Select Logical Device 5 Registers (UART2) */
 173                         outb(0x07, cfg_base);
 174                         outb(0x05, cfg_base+1);
 175
 176                         /* Read Chip Identification Register */
 177                         outb(chip->cid_index, cfg_base);
 178                         reg = inb(cfg_base+1);
 179
 180                         if (reg == chip->cid_value)
 181                         {
 182                                 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
 183
 184                                 outb(0x1F, cfg_base);
 185                                 revision = inb(cfg_base+1);
 186                                 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
 187                                            chip->name, revision);
 188
 189                                 /*
 190                                  * If the user supplies the base address, then
 191                                  * we init the chip, if not we probe the values
 192                                  * set by the BIOS
 193                                  */
 194                                 if (io[i] < 2000)
 195                                 {
 196                                         chip->init(chip, &info);
 197                                 }
 198                                 else
 199                                 {
 200                                         chip->probe(chip, &info);
 201                                 }
 202
 203                                 if (ali_ircc_open(i, &info) == 0)
 204                                         ret = 0;
 205                                 i++;
 206                         }
 207                         else
 208                         {
 209                                 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
 210                         }
 211                         /* Exit configuration */
 212                         outb(0xbb, cfg_base);
 213                 }
 214         }
 215
 216         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 217         return ret;
 218 }
 219
 220 /*
 221  * Function ali_ircc_cleanup ()
 222  *
 223  *    Close all configured chips
 224  *
 225  */
 226 static void __exit ali_ircc_cleanup(void)
 227 {
 228         int i;
 229
 230         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 231
 232         pm_unregister_all(ali_ircc_pmproc);
 233
 234         for (i=0; i < 4; i++) {
 235                 if (dev_self[i])
 236                         ali_ircc_close(dev_self[i]);
 237         }
 238
 239         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 240 }
 241
 242 /*
 243  * Function ali_ircc_open (int i, chipio_t *inf)
 244  *
 245  *    Open driver instance
 246  *
 247  */
 248 static int ali_ircc_open(int i, chipio_t *info)
 249 {
 250         struct net_device *dev;
 251         struct ali_ircc_cb *self;
 252         struct pm_dev *pmdev;
 253         int dongle_id;
 254         int err;
 255
 256         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 257
 258         /* Set FIR FIFO and DMA Threshold */
 259         if ((ali_ircc_setup(info)) == -1)
 260                 return -1;
 261
 262         dev = alloc_irdadev(sizeof(*self));
 263         if (dev == NULL) {
 264                 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
 265                            __FUNCTION__);
 266                 return -ENOMEM;
 267         }
 268
 269         self = dev->priv;
 270         self->netdev = dev;
 271         spin_lock_init(&self->lock);
 272
 273         /* Need to store self somewhere */
 274         dev_self[i] = self;
 275         self->index = i;
 276
 277         /* Initialize IO */
 278         self->io.cfg_base  = info->cfg_base;    /* In ali_ircc_probe_53 assign          */
 279         self->io.fir_base  = info->fir_base;    /* info->sir_base = info->fir_base      */
 280         self->io.sir_base  = info->sir_base;    /* ALi SIR and FIR use the same address */
 281         self->io.irq       = info->irq;
 282         self->io.fir_ext   = CHIP_IO_EXTENT;
 283         self->io.dma       = info->dma;
 284         self->io.fifo_size = 16;                /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
 285
 286         /* Reserve the ioports that we need */
 287         if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
 288                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
 289                         self->io.fir_base);
 290                 err = -ENODEV;
 291                 goto err_out1;
 292         }
 293
 294         /* Initialize QoS for this device */
 295         irda_init_max_qos_capabilies(&self->qos);
 296
 297         /* The only value we must override it the baudrate */
 298         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 299                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
 300
 301         self->qos.min_turn_time.bits = qos_mtt_bits;
 302
 303         irda_qos_bits_to_value(&self->qos);
 304
 305         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
 306         self->rx_buff.truesize = 14384;
 307         self->tx_buff.truesize = 14384;
 308
 309         /* Allocate memory if needed */
 310         self->rx_buff.head =
 311                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 312                                    &self->rx_buff_dma, GFP_KERNEL);
 313         if (self->rx_buff.head == NULL) {
 314                 err = -ENOMEM;
 315                 goto err_out2;
 316         }
 317         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 318
 319         self->tx_buff.head =
 320                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 321                                    &self->tx_buff_dma, GFP_KERNEL);
 322         if (self->tx_buff.head == NULL) {
 323                 err = -ENOMEM;
 324                 goto err_out3;
 325         }
 326         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 327
 328         self->rx_buff.in_frame = FALSE;
 329         self->rx_buff.state = OUTSIDE_FRAME;
 330         self->tx_buff.data = self->tx_buff.head;
 331         self->rx_buff.data = self->rx_buff.head;
 332
 333         /* Reset Tx queue info */
 334         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
 335         self->tx_fifo.tail = self->tx_buff.head;
 336
 337
 338         /* Keep track of module usage */
 339         SET_MODULE_OWNER(dev);
 340
 341         /* Override the network functions we need to use */
 342         dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
 343         dev->open            = ali_ircc_net_open;
 344         dev->stop            = ali_ircc_net_close;
 345         dev->do_ioctl        = ali_ircc_net_ioctl;
 346         dev->get_stats       = ali_ircc_net_get_stats;
 347
 348         err = register_netdev(dev);
 349         if (err) {
 350                 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
 351                 goto err_out4;
 352         }
 353         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 354
 355         /* Check dongle id */
 356         dongle_id = ali_ircc_read_dongle_id(i, info);
 357         IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__, driver_name, dongle_types[dongle_id]);
 358
 359         self->io.dongle_id = dongle_id;
 360
 361         pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, ali_ircc_pmproc);
 362         if (pmdev)
 363                 pmdev->data = self;
 364
 365         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 366
 367         return 0;
 368
 369  err_out4:
 370         dma_free_coherent(NULL, self->tx_buff.truesize,
 371                           self->tx_buff.head, self->tx_buff_dma);
 372  err_out3:
 373         dma_free_coherent(NULL, self->rx_buff.truesize,
 374                           self->rx_buff.head, self->rx_buff_dma);
 375  err_out2:
 376         release_region(self->io.fir_base, self->io.fir_ext);
 377  err_out1:
 378         dev_self[i] = NULL;
 379         free_netdev(dev);
 380         return err;
 381 }
 382
 383
 384 /*
 385  * Function ali_ircc_close (self)
 386  *
 387  *    Close driver instance
 388  *
 389  */
 390 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
 391 {
 392         int iobase;
 393
 394         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 395
 396         IRDA_ASSERT(self != NULL, return -1;);
 397
 398         iobase = self->io.fir_base;
 399
 400         /* Remove netdevice */
 401         unregister_netdev(self->netdev);
 402
 403         /* Release the PORT that this driver is using */
 404         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
 405         release_region(self->io.fir_base, self->io.fir_ext);
 406
 407         if (self->tx_buff.head)
 408                 dma_free_coherent(NULL, self->tx_buff.truesize,
 409                                   self->tx_buff.head, self->tx_buff_dma);
 410
 411         if (self->rx_buff.head)
 412                 dma_free_coherent(NULL, self->rx_buff.truesize,
 413                                   self->rx_buff.head, self->rx_buff_dma);
 414
 415         dev_self[self->index] = NULL;
 416         free_netdev(self->netdev);
 417
 418         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 419
 420         return 0;
 421 }
 422
 423 /*
 424  * Function ali_ircc_init_43 (chip, info)
 425  *
 426  *    Initialize the ALi M1543 chip.
 427  */
 428 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
 429 {
 430         /* All controller information like I/O address, DMA channel, IRQ
 431          * are set by BIOS
 432          */
 433
 434         return 0;
 435 }
 436
 437 /*
 438  * Function ali_ircc_init_53 (chip, info)
 439  *
 440  *    Initialize the ALi M1535 chip.
 441  */
 442 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
 443 {
 444         /* All controller information like I/O address, DMA channel, IRQ
 445          * are set by BIOS
 446          */
 447
 448         return 0;
 449 }
 450
 451 /*
 452  * Function ali_ircc_probe_53 (chip, info)
 453  *
 454  *      Probes for the ALi M1535D or M1535
 455  */
 456 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
 457 {
 458         int cfg_base = info->cfg_base;
 459         int hi, low, reg;
 460
 461         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 462
 463         /* Enter Configuration */
 464         outb(chip->entr1, cfg_base);
 465         outb(chip->entr2, cfg_base);
 466
 467         /* Select Logical Device 5 Registers (UART2) */
 468         outb(0x07, cfg_base);
 469         outb(0x05, cfg_base+1);
 470
 471         /* Read address control register */
 472         outb(0x60, cfg_base);
 473         hi = inb(cfg_base+1);
 474         outb(0x61, cfg_base);
 475         low = inb(cfg_base+1);
 476         info->fir_base = (hi<<8) + low;
 477
 478         info->sir_base = info->fir_base;
 479
 480         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
 481
 482         /* Read IRQ control register */
 483         outb(0x70, cfg_base);
 484         reg = inb(cfg_base+1);
 485         info->irq = reg & 0x0f;
 486         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
 487
 488         /* Read DMA channel */
 489         outb(0x74, cfg_base);
 490         reg = inb(cfg_base+1);
 491         info->dma = reg & 0x07;
 492
 493         if(info->dma == 0x04)
 494                 IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
 495         else
 496                 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
 497
 498         /* Read Enabled Status */
 499         outb(0x30, cfg_base);
 500         reg = inb(cfg_base+1);
 501         info->enabled = (reg & 0x80) && (reg & 0x01);
 502         IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
 503
 504         /* Read Power Status */
 505         outb(0x22, cfg_base);
 506         reg = inb(cfg_base+1);
 507         info->suspended = (reg & 0x20);
 508         IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
 509
 510         /* Exit configuration */
 511         outb(0xbb, cfg_base);
 512
 513         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * Function ali_ircc_setup (info)
 520  *
 521  *      Set FIR FIFO and DMA Threshold
 522  *      Returns non-negative on success.
 523  *
 524  */
 525 static int ali_ircc_setup(chipio_t *info)
 526 {
 527         unsigned char tmp;
 528         int version;
 529         int iobase = info->fir_base;
 530
 531         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 532
 533         /* Locking comments :
 534          * Most operations here need to be protected. We are called before
 535          * the device instance is created in ali_ircc_open(), therefore
 536          * nobody can bother us - Jean II */
 537
 538         /* Switch to FIR space */
 539         SIR2FIR(iobase);
 540
 541         /* Master Reset */
 542         outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
 543
 544         /* Read FIR ID Version Register */
 545         switch_bank(iobase, BANK3);
 546         version = inb(iobase+FIR_ID_VR);
 547
 548         /* Should be 0x00 in the M1535/M1535D */
 549         if(version != 0x00)
 550         {
 551                 IRDA_ERROR("%s, Wrong chip version %02x\n", driver_name, version);
 552                 return -1;
 553         }
 554
 555         // IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name, info->cfg_base);
 556
 557         /* Set FIR FIFO Threshold Register */
 558         switch_bank(iobase, BANK1);
 559         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
 560
 561         /* Set FIR DMA Threshold Register */
 562         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
 563
 564         /* CRC enable */
 565         switch_bank(iobase, BANK2);
 566         outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
 567
 568         /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
 569
 570         /* Switch to Bank 0 */
 571         switch_bank(iobase, BANK0);
 572
 573         tmp = inb(iobase+FIR_LCR_B);
 574         tmp &=~0x20; // disable SIP
 575         tmp |= 0x80; // these two steps make RX mode
 576         tmp &= 0xbf;
 577         outb(tmp, iobase+FIR_LCR_B);
 578
 579         /* Disable Interrupt */
 580         outb(0x00, iobase+FIR_IER);
 581
 582
 583         /* Switch to SIR space */
 584         FIR2SIR(iobase);
 585
 586         IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n", driver_name);
 587
 588         /* Enable receive interrupts */
 589         // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
 590         // Turn on the interrupts in ali_ircc_net_open
 591
 592         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 593
 594         return 0;
 595 }
 596
 597 /*
 598  * Function ali_ircc_read_dongle_id (int index, info)
 599  *
 600  * Try to read dongle indentification. This procedure needs to be executed
 601  * once after power-on/reset. It also needs to be used whenever you suspect
 602  * that the user may have plugged/unplugged the IrDA Dongle.
 603  */
 604 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
 605 {
 606         int dongle_id, reg;
 607         int cfg_base = info->cfg_base;
 608
 609         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 610
 611         /* Enter Configuration */
 612         outb(chips[i].entr1, cfg_base);
 613         outb(chips[i].entr2, cfg_base);
 614
 615         /* Select Logical Device 5 Registers (UART2) */
 616         outb(0x07, cfg_base);
 617         outb(0x05, cfg_base+1);
 618
 619         /* Read Dongle ID */
 620         outb(0xf0, cfg_base);
 621         reg = inb(cfg_base+1);
 622         dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
 623         IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__,
 624                 dongle_id, dongle_types[dongle_id]);
 625
 626         /* Exit configuration */
 627         outb(0xbb, cfg_base);
 628
 629         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 630
 631         return dongle_id;
 632 }
 633
 634 /*
 635  * Function ali_ircc_interrupt (irq, dev_id, regs)
 636  *
 637  *    An interrupt from the chip has arrived. Time to do some work
 638  *
 639  */
 640 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id,
 641                                         struct pt_regs *regs)
 642 {
 643         struct net_device *dev = (struct net_device *) dev_id;
 644         struct ali_ircc_cb *self;
 645         int ret;
 646
 647         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 648
 649         if (!dev) {
 650                 IRDA_WARNING("%s: irq %d for unknown device.\n", driver_name, irq);
 651                 return IRQ_NONE;
 652         }
 653
 654         self = (struct ali_ircc_cb *) dev->priv;
 655
 656         spin_lock(&self->lock);
 657
 658         /* Dispatch interrupt handler for the current speed */
 659         if (self->io.speed > 115200)
 660                 ret = ali_ircc_fir_interrupt(self);
 661         else
 662                 ret = ali_ircc_sir_interrupt(self);
 663
 664         spin_unlock(&self->lock);
 665
 666         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 667         return ret;
 668 }
 669 /*
 670  * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
 671  *
 672  *    Handle MIR/FIR interrupt
 673  *
 674  */
 675 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
 676 {
 677         __u8 eir, OldMessageCount;
 678         int iobase, tmp;
 679
 680         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 681
 682         iobase = self->io.fir_base;
 683
 684         switch_bank(iobase, BANK0);
 685         self->InterruptID = inb(iobase+FIR_IIR);
 686         self->BusStatus = inb(iobase+FIR_BSR);
 687
 688         OldMessageCount = (self->LineStatus + 1) & 0x07;
 689         self->LineStatus = inb(iobase+FIR_LSR);
 690         //self->ier = inb(iobase+FIR_IER);              2000/12/1 04:32PM
 691         eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
 692
 693         IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
 694         IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
 695         IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
 696         IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
 697
 698         /* Disable interrupts */
 699          SetCOMInterrupts(self, FALSE);
 700
 701         /* Tx or Rx Interrupt */
 702
 703         if (eir & IIR_EOM)
 704         {
 705                 if (self->io.direction == IO_XMIT) /* TX */
 706                 {
 707                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
 708
 709                         if(ali_ircc_dma_xmit_complete(self))
 710                         {
 711                                 if (irda_device_txqueue_empty(self->netdev))
 712                                 {
 713                                         /* Prepare for receive */
 714                                         ali_ircc_dma_receive(self);
 715                                         self->ier = IER_EOM;
 716                                 }
 717                         }
 718                         else
 719                         {
 720                                 self->ier = IER_EOM;
 721                         }
 722
 723                 }
 724                 else /* RX */
 725                 {
 726                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
 727
 728                         if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 729                         {
 730                                 self->rcvFramesOverflow = TRUE;
 731                                 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
 732                         }
 733
 734                         if (ali_ircc_dma_receive_complete(self))
 735                         {
 736                                 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
 737
 738                                 self->ier = IER_EOM;
 739                         }
 740                         else
 741                         {
 742                                 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
 743
 744                                 self->ier = IER_EOM | IER_TIMER;
 745                         }
 746
 747                 }
 748         }
 749         /* Timer Interrupt */
 750         else if (eir & IIR_TIMER)
 751         {
 752                 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 753                 {
 754                         self->rcvFramesOverflow = TRUE;
 755                         IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
 756                 }
 757                 /* Disable Timer */
 758                 switch_bank(iobase, BANK1);
 759                 tmp = inb(iobase+FIR_CR);
 760                 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
 761
 762                 /* Check if this is a Tx timer interrupt */
 763                 if (self->io.direction == IO_XMIT)
 764                 {
 765                         ali_ircc_dma_xmit(self);
 766
 767                         /* Interrupt on EOM */
 768                         self->ier = IER_EOM;
 769
 770                 }
 771                 else /* Rx */
 772                 {
 773                         if(ali_ircc_dma_receive_complete(self))
 774                         {
 775                                 self->ier = IER_EOM;
 776                         }
 777                         else
 778                         {
 779                                 self->ier = IER_EOM | IER_TIMER;
 780                         }
 781                 }
 782         }
 783
 784         /* Restore Interrupt */
 785         SetCOMInterrupts(self, TRUE);
 786
 787         IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
 788         return IRQ_RETVAL(eir);
 789 }
 790
 791 /*
 792  * Function ali_ircc_sir_interrupt (irq, self, eir)
 793  *
 794  *    Handle SIR interrupt
 795  *
 796  */
 797 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
 798 {
 799         int iobase;
 800         int iir, lsr;
 801
 802         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 803
 804         iobase = self->io.sir_base;
 805
 806         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
 807         if (iir) {
 808                 /* Clear interrupt */
 809                 lsr = inb(iobase+UART_LSR);
 810
 811                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__,
 812                            iir, lsr, iobase);
 813
 814                 switch (iir)
 815                 {
 816                         case UART_IIR_RLSI:
 817                                 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
 818                                 break;
 819                         case UART_IIR_RDI:
 820                                 /* Receive interrupt */
 821                                 ali_ircc_sir_receive(self);
 822                                 break;
 823                         case UART_IIR_THRI:
 824                                 if (lsr & UART_LSR_THRE)
 825                                 {
 826                                         /* Transmitter ready for data */
 827                                         ali_ircc_sir_write_wakeup(self);
 828                                 }
 829                                 break;
 830                         default:
 831                                 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
 832                                 break;
 833                 }
 834
 835         }
 836
 837
 838         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 839
 840         return IRQ_RETVAL(iir);
 841 }
 842
 843
 844 /*
 845  * Function ali_ircc_sir_receive (self)
 846  *
 847  *    Receive one frame from the infrared port
 848  *
 849  */
 850 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
 851 {
 852         int boguscount = 0;
 853         int iobase;
 854
 855         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 856         IRDA_ASSERT(self != NULL, return;);
 857
 858         iobase = self->io.sir_base;
 859
 860         /*
 861          * Receive all characters in Rx FIFO, unwrap and unstuff them.
 862          * async_unwrap_char will deliver all found frames
 863          */
 864         do {
 865                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
 866                                   inb(iobase+UART_RX));
 867
 868                 /* Make sure we don't stay here too long */
 869                 if (boguscount++ > 32) {
 870                         IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
 871                         break;
 872                 }
 873         } while (inb(iobase+UART_LSR) & UART_LSR_DR);
 874
 875         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 876 }
 877
 878 /*
 879  * Function ali_ircc_sir_write_wakeup (tty)
 880  *
 881  *    Called by the driver when there's room for more data.  If we have
 882  *    more packets to send, we send them here.
 883  *
 884  */
 885 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
 886 {
 887         int actual = 0;
 888         int iobase;
 889
 890         IRDA_ASSERT(self != NULL, return;);
 891
 892         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 893
 894         iobase = self->io.sir_base;
 895
 896         /* Finished with frame?  */
 897         if (self->tx_buff.len > 0)
 898         {
 899                 /* Write data left in transmit buffer */
 900                 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
 901                                       self->tx_buff.data, self->tx_buff.len);
 902                 self->tx_buff.data += actual;
 903                 self->tx_buff.len  -= actual;
 904         }
 905         else
 906         {
 907                 if (self->new_speed)
 908                 {
 909                         /* We must wait until all data are gone */
 910                         while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
 911                                 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
 912
 913                         IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
 914                         ali_ircc_change_speed(self, self->new_speed);
 915                         self->new_speed = 0;
 916
 917                         // benjamin 2000/11/10 06:32PM
 918                         if (self->io.speed > 115200)
 919                         {
 920                                 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );
 921
 922                                 self->ier = IER_EOM;
 923                                 // SetCOMInterrupts(self, TRUE);
 924                                 return;
 925                         }
 926                 }
 927                 else
 928                 {
 929                         netif_wake_queue(self->netdev);
 930                 }
 931
 932                 self->stats.tx_packets++;
 933
 934                 /* Turn on receive interrupts */
 935                 outb(UART_IER_RDI, iobase+UART_IER);
 936         }
 937
 938         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 939 }
 940
 941 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
 942 {
 943         struct net_device *dev = self->netdev;
 944         int iobase;
 945
 946         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 947
 948         IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
 949
 950         /* This function *must* be called with irq off and spin-lock.
 951          * - Jean II */
 952
 953         iobase = self->io.fir_base;
 954
 955         SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
 956
 957         /* Go to MIR, FIR Speed */
 958         if (baud > 115200)
 959         {
 960
 961
 962                 ali_ircc_fir_change_speed(self, baud);
 963
 964                 /* Install FIR xmit handler*/
 965                 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;
 966
 967                 /* Enable Interuupt */
 968                 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
 969
 970                 /* Be ready for incomming frames */
 971                 ali_ircc_dma_receive(self);     // benajmin 2000/11/8 07:46PM not complete
 972         }
 973         /* Go to SIR Speed */
 974         else
 975         {
 976                 ali_ircc_sir_change_speed(self, baud);
 977
 978                 /* Install SIR xmit handler*/
 979                 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
 980         }
 981
 982
 983         SetCOMInterrupts(self, TRUE);   // 2000/11/24 11:43AM
 984
 985         netif_wake_queue(self->netdev);
 986
 987         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 988 }
 989
 990 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
 991 {
 992
 993         int iobase;
 994         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
 995         struct net_device *dev;
 996
 997         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 998
 999         IRDA_ASSERT(self != NULL, return;);
1000
1001         dev = self->netdev;
1002         iobase = self->io.fir_base;
1003
1004         IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1005
1006         /* Come from SIR speed */
1007         if(self->io.speed <=115200)
1008         {
1009                 SIR2FIR(iobase);
1010         }
1011
1012         /* Update accounting for new speed */
1013         self->io.speed = baud;
1014
1015         // Set Dongle Speed mode
1016         ali_ircc_change_dongle_speed(self, baud);
1017
1018         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1019 }
1020
1021 /*
1022  * Function ali_sir_change_speed (self, speed)
1023  *
1024  *    Set speed of IrDA port to specified baudrate
1025  *
1026  */
1027 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1028 {
1029         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1030         unsigned long flags;
1031         int iobase;
1032         int fcr;    /* FIFO control reg */
1033         int lcr;    /* Line control reg */
1034         int divisor;
1035
1036         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1037
1038         IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1039
1040         IRDA_ASSERT(self != NULL, return;);
1041
1042         iobase = self->io.sir_base;
1043
1044         /* Come from MIR or FIR speed */
1045         if(self->io.speed >115200)
1046         {
1047                 // Set Dongle Speed mode first
1048                 ali_ircc_change_dongle_speed(self, speed);
1049
1050                 FIR2SIR(iobase);
1051         }
1052
1053         // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1054
1055         inb(iobase+UART_LSR);
1056         inb(iobase+UART_SCR);
1057
1058         /* Update accounting for new speed */
1059         self->io.speed = speed;
1060
1061         spin_lock_irqsave(&self->lock, flags);
1062
1063         divisor = 115200/speed;
1064
1065         fcr = UART_FCR_ENABLE_FIFO;
1066
1067         /*
1068          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1069          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1070          * about this timeout since it will always be fast enough.
1071          */
1072         if (self->io.speed < 38400)
1073                 fcr |= UART_FCR_TRIGGER_1;
1074         else
1075                 fcr |= UART_FCR_TRIGGER_14;
1076
1077         /* IrDA ports use 8N1 */
1078         lcr = UART_LCR_WLEN8;
1079
1080         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1081         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1082         outb(divisor >> 8,        iobase+UART_DLM);
1083         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1084         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1085
1086         /* without this, the conection will be broken after come back from FIR speed,
1087            but with this, the SIR connection is harder to established */
1088         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1089
1090         spin_unlock_irqrestore(&self->lock, flags);
1091
1092         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1093 }
1094
1095 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1096 {
1097
1098         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1099         int iobase,dongle_id;
1100         int tmp = 0;
1101
1102         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1103
1104         iobase = self->io.fir_base;     /* or iobase = self->io.sir_base; */
1105         dongle_id = self->io.dongle_id;
1106
1107         /* We are already locked, no need to do it again */
1108
1109         IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);
1110
1111         switch_bank(iobase, BANK2);
1112         tmp = inb(iobase+FIR_IRDA_CR);
1113
1114         /* IBM type dongle */
1115         if(dongle_id == 0)
1116         {
1117                 if(speed == 4000000)
1118                 {
1119                         //            __ __
1120                         // SD/MODE __|     |__ __
1121                         //               __ __
1122                         // IRTX    __ __|     |__
1123                         //         T1 T2 T3 T4 T5
1124
1125                         tmp &=  ~IRDA_CR_HDLC;          // HDLC=0
1126                         tmp |= IRDA_CR_CRC;             // CRC=1
1127
1128                         switch_bank(iobase, BANK2);
1129                         outb(tmp, iobase+FIR_IRDA_CR);
1130
1131                         // T1 -> SD/MODE:0 IRTX:0
1132                         tmp &= ~0x09;
1133                         tmp |= 0x02;
1134                         outb(tmp, iobase+FIR_IRDA_CR);
1135                         udelay(2);
1136
1137                         // T2 -> SD/MODE:1 IRTX:0
1138                         tmp &= ~0x01;
1139                         tmp |= 0x0a;
1140                         outb(tmp, iobase+FIR_IRDA_CR);
1141                         udelay(2);
1142
1143                         // T3 -> SD/MODE:1 IRTX:1
1144                         tmp |= 0x0b;
1145                         outb(tmp, iobase+FIR_IRDA_CR);
1146                         udelay(2);
1147
1148                         // T4 -> SD/MODE:0 IRTX:1
1149                         tmp &= ~0x08;
1150                         tmp |= 0x03;
1151                         outb(tmp, iobase+FIR_IRDA_CR);
1152                         udelay(2);
1153
1154                         // T5 -> SD/MODE:0 IRTX:0
1155                         tmp &= ~0x09;
1156                         tmp |= 0x02;
1157                         outb(tmp, iobase+FIR_IRDA_CR);
1158                         udelay(2);
1159
1160                         // reset -> Normal TX output Signal
1161                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1162                 }
1163                 else /* speed <=1152000 */
1164                 {
1165                         //            __
1166                         // SD/MODE __|  |__
1167                         //
1168                         // IRTX    ________
1169                         //         T1 T2 T3
1170
1171                         /* MIR 115200, 57600 */
1172                         if (speed==1152000)
1173                         {
1174                                 tmp |= 0xA0;       //HDLC=1, 1.152Mbps=1
1175                         }
1176                         else
1177                         {
1178                                 tmp &=~0x80;       //HDLC 0.576Mbps
1179                                 tmp |= 0x20;       //HDLC=1,
1180                         }
1181
1182                         tmp |= IRDA_CR_CRC;             // CRC=1
1183
1184                         switch_bank(iobase, BANK2);
1185                         outb(tmp, iobase+FIR_IRDA_CR);
1186
1187                         /* MIR 115200, 57600 */
1188
1189                         //switch_bank(iobase, BANK2);
1190                         // T1 -> SD/MODE:0 IRTX:0
1191                         tmp &= ~0x09;
1192                         tmp |= 0x02;
1193                         outb(tmp, iobase+FIR_IRDA_CR);
1194                         udelay(2);
1195
1196                         // T2 -> SD/MODE:1 IRTX:0
1197                         tmp &= ~0x01;
1198                         tmp |= 0x0a;
1199                         outb(tmp, iobase+FIR_IRDA_CR);
1200
1201                         // T3 -> SD/MODE:0 IRTX:0
1202                         tmp &= ~0x09;
1203                         tmp |= 0x02;
1204                         outb(tmp, iobase+FIR_IRDA_CR);
1205                         udelay(2);
1206
1207                         // reset -> Normal TX output Signal
1208                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1209                 }
1210         }
1211         else if (dongle_id == 1) /* HP HDSL-3600 */
1212         {
1213                 switch(speed)
1214                 {
1215                 case 4000000:
1216                         tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1217                         break;
1218
1219                 case 1152000:
1220                         tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1221                         break;
1222
1223                 case 576000:
1224                         tmp &=~0x80;            // HDLC 0.576Mbps
1225                         tmp |= 0x20;            // HDLC=1,
1226                         break;
1227                 }
1228
1229                 tmp |= IRDA_CR_CRC;             // CRC=1
1230
1231                 switch_bank(iobase, BANK2);
1232                 outb(tmp, iobase+FIR_IRDA_CR);
1233         }
1234         else /* HP HDSL-1100 */
1235         {
1236                 if(speed <= 115200) /* SIR */
1237                 {
1238
1239                         tmp &= ~IRDA_CR_FIR_SIN;        // HP sin select = 0
1240
1241                         switch_bank(iobase, BANK2);
1242                         outb(tmp, iobase+FIR_IRDA_CR);
1243                 }
1244                 else /* MIR FIR */
1245                 {
1246
1247                         switch(speed)
1248                         {
1249                         case 4000000:
1250                                 tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1251                                 break;
1252
1253                         case 1152000:
1254                                 tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1255                                 break;
1256
1257                         case 576000:
1258                                 tmp &=~0x80;            // HDLC 0.576Mbps
1259                                 tmp |= 0x20;            // HDLC=1,
1260                                 break;
1261                         }
1262
1263                         tmp |= IRDA_CR_CRC;             // CRC=1
1264                         tmp |= IRDA_CR_FIR_SIN;         // HP sin select = 1
1265
1266                         switch_bank(iobase, BANK2);
1267                         outb(tmp, iobase+FIR_IRDA_CR);
1268                 }
1269         }
1270
1271         switch_bank(iobase, BANK0);
1272
1273         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1274 }
1275
1276 /*
1277  * Function ali_ircc_sir_write (driver)
1278  *
1279  *    Fill Tx FIFO with transmit data
1280  *
1281  */
1282 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1283 {
1284         int actual = 0;
1285
1286         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1287
1288         /* Tx FIFO should be empty! */
1289         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1290                 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1291                 return 0;
1292         }
1293
1294         /* Fill FIFO with current frame */
1295         while ((fifo_size-- > 0) && (actual < len)) {
1296                 /* Transmit next byte */
1297                 outb(buf[actual], iobase+UART_TX);
1298
1299                 actual++;
1300         }
1301
1302         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1303         return actual;
1304 }
1305
1306 /*
1307  * Function ali_ircc_net_open (dev)
1308  *
1309  *    Start the device
1310  *
1311  */
1312 static int ali_ircc_net_open(struct net_device *dev)
1313 {
1314         struct ali_ircc_cb *self;
1315         int iobase;
1316         char hwname[32];
1317
1318         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1319
1320         IRDA_ASSERT(dev != NULL, return -1;);
1321
1322         self = (struct ali_ircc_cb *) dev->priv;
1323
1324         IRDA_ASSERT(self != NULL, return 0;);
1325
1326         iobase = self->io.fir_base;
1327
1328         /* Request IRQ and install Interrupt Handler */
1329         if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1330         {
1331                 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1332                              self->io.irq);
1333                 return -EAGAIN;
1334         }
1335
1336         /*
1337          * Always allocate the DMA channel after the IRQ, and clean up on
1338          * failure.
1339          */
1340         if (request_dma(self->io.dma, dev->name)) {
1341                 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1342                              self->io.dma);
1343                 free_irq(self->io.irq, self);
1344                 return -EAGAIN;
1345         }
1346
1347         /* Turn on interrups */
1348         outb(UART_IER_RDI , iobase+UART_IER);
1349
1350         /* Ready to play! */
1351         netif_start_queue(dev); //benjamin by irport
1352
1353         /* Give self a hardware name */
1354         sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1355
1356         /*
1357          * Open new IrLAP layer instance, now that everything should be
1358          * initialized properly
1359          */
1360         self->irlap = irlap_open(dev, &self->qos, hwname);
1361
1362         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1363
1364         return 0;
1365 }
1366
1367 /*
1368  * Function ali_ircc_net_close (dev)
1369  *
1370  *    Stop the device
1371  *
1372  */
1373 static int ali_ircc_net_close(struct net_device *dev)
1374 {
1375
1376         struct ali_ircc_cb *self;
1377         //int iobase;
1378
1379         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1380
1381         IRDA_ASSERT(dev != NULL, return -1;);
1382
1383         self = (struct ali_ircc_cb *) dev->priv;
1384         IRDA_ASSERT(self != NULL, return 0;);
1385
1386         /* Stop device */
1387         netif_stop_queue(dev);
1388
1389         /* Stop and remove instance of IrLAP */
1390         if (self->irlap)
1391                 irlap_close(self->irlap);
1392         self->irlap = NULL;
1393
1394         disable_dma(self->io.dma);
1395
1396         /* Disable interrupts */
1397         SetCOMInterrupts(self, FALSE);
1398
1399         free_irq(self->io.irq, dev);
1400         free_dma(self->io.dma);
1401
1402         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1403
1404         return 0;
1405 }
1406
1407 /*
1408  * Function ali_ircc_fir_hard_xmit (skb, dev)
1409  *
1410  *    Transmit the frame
1411  *
1412  */
1413 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1414 {
1415         struct ali_ircc_cb *self;
1416         unsigned long flags;
1417         int iobase;
1418         __u32 speed;
1419         int mtt, diff;
1420
1421         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1422
1423         self = (struct ali_ircc_cb *) dev->priv;
1424         iobase = self->io.fir_base;
1425
1426         netif_stop_queue(dev);
1427
1428         /* Make sure tests *& speed change are atomic */
1429         spin_lock_irqsave(&self->lock, flags);
1430
1431         /* Note : you should make sure that speed changes are not going
1432          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1433          * details - Jean II */
1434
1435         /* Check if we need to change the speed */
1436         speed = irda_get_next_speed(skb);
1437         if ((speed != self->io.speed) && (speed != -1)) {
1438                 /* Check for empty frame */
1439                 if (!skb->len) {
1440                         ali_ircc_change_speed(self, speed);
1441                         dev->trans_start = jiffies;
1442                         spin_unlock_irqrestore(&self->lock, flags);
1443                         dev_kfree_skb(skb);
1444                         return 0;
1445                 } else
1446                         self->new_speed = speed;
1447         }
1448
1449         /* Register and copy this frame to DMA memory */
1450         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1451         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1452         self->tx_fifo.tail += skb->len;
1453
1454         self->stats.tx_bytes += skb->len;
1455
1456         memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
1457                skb->len);
1458
1459         self->tx_fifo.len++;
1460         self->tx_fifo.free++;
1461
1462         /* Start transmit only if there is currently no transmit going on */
1463         if (self->tx_fifo.len == 1)
1464         {
1465                 /* Check if we must wait the min turn time or not */
1466                 mtt = irda_get_mtt(skb);
1467
1468                 if (mtt)
1469                 {
1470                         /* Check how much time we have used already */
1471                         do_gettimeofday(&self->now);
1472
1473                         diff = self->now.tv_usec - self->stamp.tv_usec;
1474                         /* self->stamp is set from ali_ircc_dma_receive_complete() */
1475
1476                         IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);
1477
1478                         if (diff < 0)
1479                                 diff += 1000000;
1480
1481                         /* Check if the mtt is larger than the time we have
1482                          * already used by all the protocol processing
1483                          */
1484                         if (mtt > diff)
1485                         {
1486                                 mtt -= diff;
1487
1488                                 /*
1489                                  * Use timer if delay larger than 1000 us, and
1490                                  * use udelay for smaller values which should
1491                                  * be acceptable
1492                                  */
1493                                 if (mtt > 500)
1494                                 {
1495                                         /* Adjust for timer resolution */
1496                                         mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
1497
1498                                         IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);
1499
1500                                         /* Setup timer */
1501                                         if (mtt == 1) /* 500 us */
1502                                         {
1503                                                 switch_bank(iobase, BANK1);
1504                                                 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1505                                         }
1506                                         else if (mtt == 2) /* 1 ms */
1507                                         {
1508                                                 switch_bank(iobase, BANK1);
1509                                                 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1510                                         }
1511                                         else /* > 2ms -> 4ms */
1512                                         {
1513                                                 switch_bank(iobase, BANK1);
1514                                                 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1515                                         }
1516
1517
1518                                         /* Start timer */
1519                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1520                                         self->io.direction = IO_XMIT;
1521
1522                                         /* Enable timer interrupt */
1523                                         self->ier = IER_TIMER;
1524                                         SetCOMInterrupts(self, TRUE);
1525
1526                                         /* Timer will take care of the rest */
1527                                         goto out;
1528                                 }
1529                                 else
1530                                         udelay(mtt);
1531                         } // if (if (mtt > diff)
1532                 }// if (mtt)
1533
1534                 /* Enable EOM interrupt */
1535                 self->ier = IER_EOM;
1536                 SetCOMInterrupts(self, TRUE);
1537
1538                 /* Transmit frame */
1539                 ali_ircc_dma_xmit(self);
1540         } // if (self->tx_fifo.len == 1)
1541
1542  out:
1543
1544         /* Not busy transmitting anymore if window is not full */
1545         if (self->tx_fifo.free < MAX_TX_WINDOW)
1546                 netif_wake_queue(self->netdev);
1547
1548         /* Restore bank register */
1549         switch_bank(iobase, BANK0);
1550
1551         dev->trans_start = jiffies;
1552         spin_unlock_irqrestore(&self->lock, flags);
1553         dev_kfree_skb(skb);
1554
1555         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1556         return 0;
1557 }
1558
1559
1560 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1561 {
1562         int iobase, tmp;
1563         unsigned char FIFO_OPTI, Hi, Lo;
1564
1565
1566         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1567
1568         iobase = self->io.fir_base;
1569
1570         /* FIFO threshold , this method comes from NDIS5 code */
1571
1572         if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1573                 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1574         else
1575                 FIFO_OPTI = TX_FIFO_Threshold;
1576
1577         /* Disable DMA */
1578         switch_bank(iobase, BANK1);
1579         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1580
1581         self->io.direction = IO_XMIT;
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         /* Reset Tx FIFO */
1590         switch_bank(iobase, BANK0);
1591         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1592
1593         /* Set Tx FIFO threshold */
1594         if (self->fifo_opti_buf!=FIFO_OPTI)
1595         {
1596                 switch_bank(iobase, BANK1);
1597                 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1598                 self->fifo_opti_buf=FIFO_OPTI;
1599         }
1600
1601         /* Set Tx DMA threshold */
1602         switch_bank(iobase, BANK1);
1603         outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1604
1605         /* Set max Tx frame size */
1606         Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1607         Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1608         switch_bank(iobase, BANK2);
1609         outb(Hi, iobase+FIR_TX_DSR_HI);
1610         outb(Lo, iobase+FIR_TX_DSR_LO);
1611
1612         /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1613         switch_bank(iobase, BANK0);
1614         tmp = inb(iobase+FIR_LCR_B);
1615         tmp &= ~0x20; // Disable SIP
1616         outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1617         IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1618
1619         outb(0, iobase+FIR_LSR);
1620
1621         /* Enable DMA and Burst Mode */
1622         switch_bank(iobase, BANK1);
1623         outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1624
1625         switch_bank(iobase, BANK0);
1626
1627         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1628 }
1629
1630 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1631 {
1632         int iobase;
1633         int ret = TRUE;
1634
1635         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1636
1637         iobase = self->io.fir_base;
1638
1639         /* Disable DMA */
1640         switch_bank(iobase, BANK1);
1641         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1642
1643         /* Check for underrun! */
1644         switch_bank(iobase, BANK0);
1645         if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1646
1647         {
1648                 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);
1649                 self->stats.tx_errors++;
1650                 self->stats.tx_fifo_errors++;
1651         }
1652         else
1653         {
1654                 self->stats.tx_packets++;
1655         }
1656
1657         /* Check if we need to change the speed */
1658         if (self->new_speed)
1659         {
1660                 ali_ircc_change_speed(self, self->new_speed);
1661                 self->new_speed = 0;
1662         }
1663
1664         /* Finished with this frame, so prepare for next */
1665         self->tx_fifo.ptr++;
1666         self->tx_fifo.len--;
1667
1668         /* Any frames to be sent back-to-back? */
1669         if (self->tx_fifo.len)
1670         {
1671                 ali_ircc_dma_xmit(self);
1672
1673                 /* Not finished yet! */
1674                 ret = FALSE;
1675         }
1676         else
1677         {       /* Reset Tx FIFO info */
1678                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1679                 self->tx_fifo.tail = self->tx_buff.head;
1680         }
1681
1682         /* Make sure we have room for more frames */
1683         if (self->tx_fifo.free < MAX_TX_WINDOW) {
1684                 /* Not busy transmitting anymore */
1685                 /* Tell the network layer, that we can accept more frames */
1686                 netif_wake_queue(self->netdev);
1687         }
1688
1689         switch_bank(iobase, BANK0);
1690
1691         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1692         return ret;
1693 }
1694
1695 /*
1696  * Function ali_ircc_dma_receive (self)
1697  *
1698  *    Get ready for receiving a frame. The device will initiate a DMA
1699  *    if it starts to receive a frame.
1700  *
1701  */
1702 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1703 {
1704         int iobase, tmp;
1705
1706         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1707
1708         iobase = self->io.fir_base;
1709
1710         /* Reset Tx FIFO info */
1711         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1712         self->tx_fifo.tail = self->tx_buff.head;
1713
1714         /* Disable DMA */
1715         switch_bank(iobase, BANK1);
1716         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1717
1718         /* Reset Message Count */
1719         switch_bank(iobase, BANK0);
1720         outb(0x07, iobase+FIR_LSR);
1721
1722         self->rcvFramesOverflow = FALSE;
1723
1724         self->LineStatus = inb(iobase+FIR_LSR) ;
1725
1726         /* Reset Rx FIFO info */
1727         self->io.direction = IO_RECV;
1728         self->rx_buff.data = self->rx_buff.head;
1729
1730         /* Reset Rx FIFO */
1731         // switch_bank(iobase, BANK0);
1732         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1733
1734         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1735         self->st_fifo.tail = self->st_fifo.head = 0;
1736
1737         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1738                        DMA_RX_MODE);
1739
1740         /* Set Receive Mode,Brick Wall */
1741         //switch_bank(iobase, BANK0);
1742         tmp = inb(iobase+FIR_LCR_B);
1743         outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1744         IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1745
1746         /* Set Rx Threshold */
1747         switch_bank(iobase, BANK1);
1748         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1749         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1750
1751         /* Enable DMA and Burst Mode */
1752         // switch_bank(iobase, BANK1);
1753         outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1754
1755         switch_bank(iobase, BANK0);
1756         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1757         return 0;
1758 }
1759
1760 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1761 {
1762         struct st_fifo *st_fifo;
1763         struct sk_buff *skb;
1764         __u8 status, MessageCount;
1765         int len, i, iobase, val;
1766
1767         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1768
1769         st_fifo = &self->st_fifo;
1770         iobase = self->io.fir_base;
1771
1772         switch_bank(iobase, BANK0);
1773         MessageCount = inb(iobase+ FIR_LSR)&0x07;
1774
1775         if (MessageCount > 0)
1776                 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);
1777
1778         for (i=0; i<=MessageCount; i++)
1779         {
1780                 /* Bank 0 */
1781                 switch_bank(iobase, BANK0);
1782                 status = inb(iobase+FIR_LSR);
1783
1784                 switch_bank(iobase, BANK2);
1785                 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1786                 len = len << 8;
1787                 len |= inb(iobase+FIR_RX_DSR_LO);
1788
1789                 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);
1790                 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1791
1792                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1793                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1794                         continue;
1795                 }
1796
1797                 st_fifo->entries[st_fifo->tail].status = status;
1798                 st_fifo->entries[st_fifo->tail].len = len;
1799                 st_fifo->pending_bytes += len;
1800                 st_fifo->tail++;
1801                 st_fifo->len++;
1802         }
1803
1804         for (i=0; i<=MessageCount; i++)
1805         {
1806                 /* Get first entry */
1807                 status = st_fifo->entries[st_fifo->head].status;
1808                 len    = st_fifo->entries[st_fifo->head].len;
1809                 st_fifo->pending_bytes -= len;
1810                 st_fifo->head++;
1811                 st_fifo->len--;
1812
1813                 /* Check for errors */
1814                 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1815                 {
1816                         IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );
1817
1818                         /* Skip frame */
1819                         self->stats.rx_errors++;
1820
1821                         self->rx_buff.data += len;
1822
1823                         if (status & LSR_FIFO_UR)
1824                         {
1825                                 self->stats.rx_frame_errors++;
1826                                 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1827                         }
1828                         if (status & LSR_FRAME_ERROR)
1829                         {
1830                                 self->stats.rx_frame_errors++;
1831                                 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1832                         }
1833
1834                         if (status & LSR_CRC_ERROR)
1835                         {
1836                                 self->stats.rx_crc_errors++;
1837                                 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1838                         }
1839
1840                         if(self->rcvFramesOverflow)
1841                         {
1842                                 self->stats.rx_frame_errors++;
1843                                 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );
1844                         }
1845                         if(len == 0)
1846                         {
1847                                 self->stats.rx_frame_errors++;
1848                                 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1849                         }
1850                 }
1851                 else
1852                 {
1853
1854                         if (st_fifo->pending_bytes < 32)
1855                         {
1856                                 switch_bank(iobase, BANK0);
1857                                 val = inb(iobase+FIR_BSR);
1858                                 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1859                                 {
1860                                         IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1861
1862                                         /* Put this entry back in fifo */
1863                                         st_fifo->head--;
1864                                         st_fifo->len++;
1865                                         st_fifo->pending_bytes += len;
1866                                         st_fifo->entries[st_fifo->head].status = status;
1867                                         st_fifo->entries[st_fifo->head].len = len;
1868
1869                                         /*
1870                                         * DMA not finished yet, so try again
1871                                         * later, set timer value, resolution
1872                                         * 500 us
1873                                         */
1874
1875                                         switch_bank(iobase, BANK1);
1876                                         outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1877
1878                                         /* Enable Timer */
1879                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1880
1881                                         return FALSE; /* I'll be back! */
1882                                 }
1883                         }
1884
1885                         /*
1886                          * Remember the time we received this frame, so we can
1887                          * reduce the min turn time a bit since we will know
1888                          * how much time we have used for protocol processing
1889                          */
1890                         do_gettimeofday(&self->stamp);
1891
1892                         skb = dev_alloc_skb(len+1);
1893                         if (skb == NULL)
1894                         {
1895                                 IRDA_WARNING("%s(), memory squeeze, "
1896                                              "dropping frame.\n",
1897                                              __FUNCTION__);
1898                                 self->stats.rx_dropped++;
1899
1900                                 return FALSE;
1901                         }
1902
1903                         /* Make sure IP header gets aligned */
1904                         skb_reserve(skb, 1);
1905
1906                         /* Copy frame without CRC, CRC is removed by hardware*/
1907                         skb_put(skb, len);
1908                         memcpy(skb->data, self->rx_buff.data, len);
1909
1910                         /* Move to next frame */
1911                         self->rx_buff.data += len;
1912                         self->stats.rx_bytes += len;
1913                         self->stats.rx_packets++;
1914
1915                         skb->dev = self->netdev;
1916                         skb->mac.raw  = skb->data;
1917                         skb->protocol = htons(ETH_P_IRDA);
1918                         netif_rx(skb);
1919                         self->netdev->last_rx = jiffies;
1920                 }
1921         }
1922
1923         switch_bank(iobase, BANK0);
1924
1925         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1926         return TRUE;
1927 }
1928
1929
1930
1931 /*
1932  * Function ali_ircc_sir_hard_xmit (skb, dev)
1933  *
1934  *    Transmit the frame!
1935  *
1936  */
1937 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1938 {
1939         struct ali_ircc_cb *self;
1940         unsigned long flags;
1941         int iobase;
1942         __u32 speed;
1943
1944         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1945
1946         IRDA_ASSERT(dev != NULL, return 0;);
1947
1948         self = (struct ali_ircc_cb *) dev->priv;
1949         IRDA_ASSERT(self != NULL, return 0;);
1950
1951         iobase = self->io.sir_base;
1952
1953         netif_stop_queue(dev);
1954
1955         /* Make sure tests *& speed change are atomic */
1956         spin_lock_irqsave(&self->lock, flags);
1957
1958         /* Note : you should make sure that speed changes are not going
1959          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1960          * details - Jean II */
1961
1962         /* Check if we need to change the speed */
1963         speed = irda_get_next_speed(skb);
1964         if ((speed != self->io.speed) && (speed != -1)) {
1965                 /* Check for empty frame */
1966                 if (!skb->len) {
1967                         ali_ircc_change_speed(self, speed);
1968                         dev->trans_start = jiffies;
1969                         spin_unlock_irqrestore(&self->lock, flags);
1970                         dev_kfree_skb(skb);
1971                         return 0;
1972                 } else
1973                         self->new_speed = speed;
1974         }
1975
1976         /* Init tx buffer */
1977         self->tx_buff.data = self->tx_buff.head;
1978
1979         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
1980         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1981                                            self->tx_buff.truesize);
1982
1983         self->stats.tx_bytes += self->tx_buff.len;
1984
1985         /* Turn on transmit finished interrupt. Will fire immediately!  */
1986         outb(UART_IER_THRI, iobase+UART_IER);
1987
1988         dev->trans_start = jiffies;
1989         spin_unlock_irqrestore(&self->lock, flags);
1990
1991         dev_kfree_skb(skb);
1992
1993         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1994
1995         return 0;
1996 }
1997
1998
1999 /*
2000  * Function ali_ircc_net_ioctl (dev, rq, cmd)
2001  *
2002  *    Process IOCTL commands for this device
2003  *
2004  */
2005 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2006 {
2007         struct if_irda_req *irq = (struct if_irda_req *) rq;
2008         struct ali_ircc_cb *self;
2009         unsigned long flags;
2010         int ret = 0;
2011
2012         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2013
2014         IRDA_ASSERT(dev != NULL, return -1;);
2015
2016         self = dev->priv;
2017
2018         IRDA_ASSERT(self != NULL, return -1;);
2019
2020         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2021
2022         switch (cmd) {
2023         case SIOCSBANDWIDTH: /* Set bandwidth */
2024                 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2025                 /*
2026                  * This function will also be used by IrLAP to change the
2027                  * speed, so we still must allow for speed change within
2028                  * interrupt context.
2029                  */
2030                 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2031                         return -EPERM;
2032
2033                 spin_lock_irqsave(&self->lock, flags);
2034                 ali_ircc_change_speed(self, irq->ifr_baudrate);
2035                 spin_unlock_irqrestore(&self->lock, flags);
2036                 break;
2037         case SIOCSMEDIABUSY: /* Set media busy */
2038                 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2039                 if (!capable(CAP_NET_ADMIN))
2040                         return -EPERM;
2041                 irda_device_set_media_busy(self->netdev, TRUE);
2042                 break;
2043         case SIOCGRECEIVING: /* Check if we are receiving right now */
2044                 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2045                 /* This is protected */
2046                 irq->ifr_receiving = ali_ircc_is_receiving(self);
2047                 break;
2048         default:
2049                 ret = -EOPNOTSUPP;
2050         }
2051
2052         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2053
2054         return ret;
2055 }
2056
2057 /*
2058  * Function ali_ircc_is_receiving (self)
2059  *
2060  *    Return TRUE is we are currently receiving a frame
2061  *
2062  */
2063 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2064 {
2065         unsigned long flags;
2066         int status = FALSE;
2067         int iobase;
2068
2069         IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2070
2071         IRDA_ASSERT(self != NULL, return FALSE;);
2072
2073         spin_lock_irqsave(&self->lock, flags);
2074
2075         if (self->io.speed > 115200)
2076         {
2077                 iobase = self->io.fir_base;
2078
2079                 switch_bank(iobase, BANK1);
2080                 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2081                 {
2082                         /* We are receiving something */
2083                         IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2084                         status = TRUE;
2085                 }
2086                 switch_bank(iobase, BANK0);
2087         }
2088         else
2089         {
2090                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2091         }
2092
2093         spin_unlock_irqrestore(&self->lock, flags);
2094
2095         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2096
2097         return status;
2098 }
2099
2100 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2101 {
2102         struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2103
2104         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2105
2106         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2107
2108         return &self->stats;
2109 }
2110
2111 static void ali_ircc_suspend(struct ali_ircc_cb *self)
2112 {
2113         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2114
2115         IRDA_MESSAGE("%s, Suspending\n", driver_name);
2116
2117         if (self->io.suspended)
2118                 return;
2119
2120         ali_ircc_net_close(self->netdev);
2121
2122         self->io.suspended = 1;
2123
2124         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2125 }
2126
2127 static void ali_ircc_wakeup(struct ali_ircc_cb *self)
2128 {
2129         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2130
2131         if (!self->io.suspended)
2132                 return;
2133
2134         ali_ircc_net_open(self->netdev);
2135
2136         IRDA_MESSAGE("%s, Waking up\n", driver_name);
2137
2138         self->io.suspended = 0;
2139
2140         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2141 }
2142
2143 static int ali_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
2144 {
2145         struct ali_ircc_cb *self = (struct ali_ircc_cb*) dev->data;
2146
2147         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2148
2149         if (self) {
2150                 switch (rqst) {
2151                 case PM_SUSPEND:
2152                         ali_ircc_suspend(self);
2153                         break;
2154                 case PM_RESUME:
2155                         ali_ircc_wakeup(self);
2156                         break;
2157                 }
2158         }
2159
2160         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2161
2162         return 0;
2163 }
2164
2165
2166 /* ALi Chip Function */
2167
2168 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2169 {
2170
2171         unsigned char newMask;
2172
2173         int iobase = self->io.fir_base; /* or sir_base */
2174
2175         IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);
2176
2177         /* Enable the interrupt which we wish to */
2178         if (enable){
2179                 if (self->io.direction == IO_XMIT)
2180                 {
2181                         if (self->io.speed > 115200) /* FIR, MIR */
2182                         {
2183                                 newMask = self->ier;
2184                         }
2185                         else /* SIR */
2186                         {
2187                                 newMask = UART_IER_THRI | UART_IER_RDI;
2188                         }
2189                 }
2190                 else {
2191                         if (self->io.speed > 115200) /* FIR, MIR */
2192                         {
2193                                 newMask = self->ier;
2194                         }
2195                         else /* SIR */
2196                         {
2197                                 newMask = UART_IER_RDI;
2198                         }
2199                 }
2200         }
2201         else /* Disable all the interrupts */
2202         {
2203                 newMask = 0x00;
2204
2205         }
2206
2207         //SIR and FIR has different registers
2208         if (self->io.speed > 115200)
2209         {
2210                 switch_bank(iobase, BANK0);
2211                 outb(newMask, iobase+FIR_IER);
2212         }
2213         else
2214                 outb(newMask, iobase+UART_IER);
2215
2216         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2217 }
2218
2219 static void SIR2FIR(int iobase)
2220 {
2221         //unsigned char tmp;
2222
2223         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2224
2225         /* Already protected (change_speed() or setup()), no need to lock.
2226          * Jean II */
2227
2228         outb(0x28, iobase+UART_MCR);
2229         outb(0x68, iobase+UART_MCR);
2230         outb(0x88, iobase+UART_MCR);
2231
2232         outb(0x60, iobase+FIR_MCR);     /*  Master Reset */
2233         outb(0x20, iobase+FIR_MCR);     /*  Master Interrupt Enable */
2234
2235         //tmp = inb(iobase+FIR_LCR_B);  /* SIP enable */
2236         //tmp |= 0x20;
2237         //outb(tmp, iobase+FIR_LCR_B);
2238
2239         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2240 }
2241
2242 static void FIR2SIR(int iobase)
2243 {
2244         unsigned char val;
2245
2246         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2247
2248         /* Already protected (change_speed() or setup()), no need to lock.
2249          * Jean II */
2250
2251         outb(0x20, iobase+FIR_MCR);     /* IRQ to low */
2252         outb(0x00, iobase+UART_IER);
2253
2254         outb(0xA0, iobase+FIR_MCR);     /* Don't set master reset */
2255         outb(0x00, iobase+UART_FCR);
2256         outb(0x07, iobase+UART_FCR);
2257
2258         val = inb(iobase+UART_RX);
2259         val = inb(iobase+UART_LSR);
2260         val = inb(iobase+UART_MSR);
2261
2262         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2263 }
2264
2265 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2266 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2267 MODULE_LICENSE("GPL");
2268
2269
2270 module_param_array(io, int, NULL, 0);
2271 MODULE_PARM_DESC(io, "Base I/O addresses");
2272 module_param_array(irq, int, NULL, 0);
2273 MODULE_PARM_DESC(irq, "IRQ lines");
2274 module_param_array(dma, int, NULL, 0);
2275 MODULE_PARM_DESC(dma, "DMA channels");
2276
2277 module_init(ali_ircc_init);
2278 module_exit(ali_ircc_cleanup);