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