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 = (struct net_device *) dev_id;
 666         struct ali_ircc_cb *self;
 667         int ret;
 668
 669         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 670
 671         if (!dev) {
 672                 IRDA_WARNING("%s: irq %d for unknown device.\n",
 673                              ALI_IRCC_DRIVER_NAME, irq);
 674                 return IRQ_NONE;
 675         }
 676
 677         self = (struct ali_ircc_cb *) dev->priv;
 678
 679         spin_lock(&self->lock);
 680
 681         /* Dispatch interrupt handler for the current speed */
 682         if (self->io.speed > 115200)
 683                 ret = ali_ircc_fir_interrupt(self);
 684         else
 685                 ret = ali_ircc_sir_interrupt(self);
 686
 687         spin_unlock(&self->lock);
 688
 689         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 690         return ret;
 691 }
 692 /*
 693  * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
 694  *
 695  *    Handle MIR/FIR interrupt
 696  *
 697  */
 698 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
 699 {
 700         __u8 eir, OldMessageCount;
 701         int iobase, tmp;
 702
 703         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 704
 705         iobase = self->io.fir_base;
 706
 707         switch_bank(iobase, BANK0);
 708         self->InterruptID = inb(iobase+FIR_IIR);
 709         self->BusStatus = inb(iobase+FIR_BSR);
 710
 711         OldMessageCount = (self->LineStatus + 1) & 0x07;
 712         self->LineStatus = inb(iobase+FIR_LSR);
 713         //self->ier = inb(iobase+FIR_IER);              2000/12/1 04:32PM
 714         eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
 715
 716         IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
 717         IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
 718         IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
 719         IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
 720
 721         /* Disable interrupts */
 722          SetCOMInterrupts(self, FALSE);
 723
 724         /* Tx or Rx Interrupt */
 725
 726         if (eir & IIR_EOM)
 727         {
 728                 if (self->io.direction == IO_XMIT) /* TX */
 729                 {
 730                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
 731
 732                         if(ali_ircc_dma_xmit_complete(self))
 733                         {
 734                                 if (irda_device_txqueue_empty(self->netdev))
 735                                 {
 736                                         /* Prepare for receive */
 737                                         ali_ircc_dma_receive(self);
 738                                         self->ier = IER_EOM;
 739                                 }
 740                         }
 741                         else
 742                         {
 743                                 self->ier = IER_EOM;
 744                         }
 745
 746                 }
 747                 else /* RX */
 748                 {
 749                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
 750
 751                         if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 752                         {
 753                                 self->rcvFramesOverflow = TRUE;
 754                                 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
 755                         }
 756
 757                         if (ali_ircc_dma_receive_complete(self))
 758                         {
 759                                 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
 760
 761                                 self->ier = IER_EOM;
 762                         }
 763                         else
 764                         {
 765                                 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
 766
 767                                 self->ier = IER_EOM | IER_TIMER;
 768                         }
 769
 770                 }
 771         }
 772         /* Timer Interrupt */
 773         else if (eir & IIR_TIMER)
 774         {
 775                 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
 776                 {
 777                         self->rcvFramesOverflow = TRUE;
 778                         IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
 779                 }
 780                 /* Disable Timer */
 781                 switch_bank(iobase, BANK1);
 782                 tmp = inb(iobase+FIR_CR);
 783                 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
 784
 785                 /* Check if this is a Tx timer interrupt */
 786                 if (self->io.direction == IO_XMIT)
 787                 {
 788                         ali_ircc_dma_xmit(self);
 789
 790                         /* Interrupt on EOM */
 791                         self->ier = IER_EOM;
 792
 793                 }
 794                 else /* Rx */
 795                 {
 796                         if(ali_ircc_dma_receive_complete(self))
 797                         {
 798                                 self->ier = IER_EOM;
 799                         }
 800                         else
 801                         {
 802                                 self->ier = IER_EOM | IER_TIMER;
 803                         }
 804                 }
 805         }
 806
 807         /* Restore Interrupt */
 808         SetCOMInterrupts(self, TRUE);
 809
 810         IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
 811         return IRQ_RETVAL(eir);
 812 }
 813
 814 /*
 815  * Function ali_ircc_sir_interrupt (irq, self, eir)
 816  *
 817  *    Handle SIR interrupt
 818  *
 819  */
 820 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
 821 {
 822         int iobase;
 823         int iir, lsr;
 824
 825         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 826
 827         iobase = self->io.sir_base;
 828
 829         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
 830         if (iir) {
 831                 /* Clear interrupt */
 832                 lsr = inb(iobase+UART_LSR);
 833
 834                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__,
 835                            iir, lsr, iobase);
 836
 837                 switch (iir)
 838                 {
 839                         case UART_IIR_RLSI:
 840                                 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
 841                                 break;
 842                         case UART_IIR_RDI:
 843                                 /* Receive interrupt */
 844                                 ali_ircc_sir_receive(self);
 845                                 break;
 846                         case UART_IIR_THRI:
 847                                 if (lsr & UART_LSR_THRE)
 848                                 {
 849                                         /* Transmitter ready for data */
 850                                         ali_ircc_sir_write_wakeup(self);
 851                                 }
 852                                 break;
 853                         default:
 854                                 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
 855                                 break;
 856                 }
 857
 858         }
 859
 860
 861         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
 862
 863         return IRQ_RETVAL(iir);
 864 }
 865
 866
 867 /*
 868  * Function ali_ircc_sir_receive (self)
 869  *
 870  *    Receive one frame from the infrared port
 871  *
 872  */
 873 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
 874 {
 875         int boguscount = 0;
 876         int iobase;
 877
 878         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
 879         IRDA_ASSERT(self != NULL, return;);
 880
 881         iobase = self->io.sir_base;
 882
 883         /*
 884          * Receive all characters in Rx FIFO, unwrap and unstuff them.
 885          * async_unwrap_char will deliver all found frames
 886          */
 887         do {
 888                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
 889                                   inb(iobase+UART_RX));
 890
 891                 /* Make sure we don't stay here too long */
 892                 if (boguscount++ > 32) {
 893                         IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
 894                         break;
 895                 }
 896         } while (inb(iobase+UART_LSR) & UART_LSR_DR);
 897
 898         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 899 }
 900
 901 /*
 902  * Function ali_ircc_sir_write_wakeup (tty)
 903  *
 904  *    Called by the driver when there's room for more data.  If we have
 905  *    more packets to send, we send them here.
 906  *
 907  */
 908 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
 909 {
 910         int actual = 0;
 911         int iobase;
 912
 913         IRDA_ASSERT(self != NULL, return;);
 914
 915         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 916
 917         iobase = self->io.sir_base;
 918
 919         /* Finished with frame?  */
 920         if (self->tx_buff.len > 0)
 921         {
 922                 /* Write data left in transmit buffer */
 923                 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
 924                                       self->tx_buff.data, self->tx_buff.len);
 925                 self->tx_buff.data += actual;
 926                 self->tx_buff.len  -= actual;
 927         }
 928         else
 929         {
 930                 if (self->new_speed)
 931                 {
 932                         /* We must wait until all data are gone */
 933                         while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
 934                                 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
 935
 936                         IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
 937                         ali_ircc_change_speed(self, self->new_speed);
 938                         self->new_speed = 0;
 939
 940                         // benjamin 2000/11/10 06:32PM
 941                         if (self->io.speed > 115200)
 942                         {
 943                                 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );
 944
 945                                 self->ier = IER_EOM;
 946                                 // SetCOMInterrupts(self, TRUE);
 947                                 return;
 948                         }
 949                 }
 950                 else
 951                 {
 952                         netif_wake_queue(self->netdev);
 953                 }
 954
 955                 self->stats.tx_packets++;
 956
 957                 /* Turn on receive interrupts */
 958                 outb(UART_IER_RDI, iobase+UART_IER);
 959         }
 960
 961         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
 962 }
 963
 964 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
 965 {
 966         struct net_device *dev = self->netdev;
 967         int iobase;
 968
 969         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
 970
 971         IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
 972
 973         /* This function *must* be called with irq off and spin-lock.
 974          * - Jean II */
 975
 976         iobase = self->io.fir_base;
 977
 978         SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
 979
 980         /* Go to MIR, FIR Speed */
 981         if (baud > 115200)
 982         {
 983
 984
 985                 ali_ircc_fir_change_speed(self, baud);
 986
 987                 /* Install FIR xmit handler*/
 988                 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;
 989
 990                 /* Enable Interuupt */
 991                 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
 992
 993                 /* Be ready for incomming frames */
 994                 ali_ircc_dma_receive(self);     // benajmin 2000/11/8 07:46PM not complete
 995         }
 996         /* Go to SIR Speed */
 997         else
 998         {
 999                 ali_ircc_sir_change_speed(self, baud);
1000
1001                 /* Install SIR xmit handler*/
1002                 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
1003         }
1004
1005
1006         SetCOMInterrupts(self, TRUE);   // 2000/11/24 11:43AM
1007
1008         netif_wake_queue(self->netdev);
1009
1010         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1011 }
1012
1013 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1014 {
1015
1016         int iobase;
1017         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1018         struct net_device *dev;
1019
1020         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1021
1022         IRDA_ASSERT(self != NULL, return;);
1023
1024         dev = self->netdev;
1025         iobase = self->io.fir_base;
1026
1027         IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1028
1029         /* Come from SIR speed */
1030         if(self->io.speed <=115200)
1031         {
1032                 SIR2FIR(iobase);
1033         }
1034
1035         /* Update accounting for new speed */
1036         self->io.speed = baud;
1037
1038         // Set Dongle Speed mode
1039         ali_ircc_change_dongle_speed(self, baud);
1040
1041         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1042 }
1043
1044 /*
1045  * Function ali_sir_change_speed (self, speed)
1046  *
1047  *    Set speed of IrDA port to specified baudrate
1048  *
1049  */
1050 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1051 {
1052         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1053         unsigned long flags;
1054         int iobase;
1055         int fcr;    /* FIFO control reg */
1056         int lcr;    /* Line control reg */
1057         int divisor;
1058
1059         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1060
1061         IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1062
1063         IRDA_ASSERT(self != NULL, return;);
1064
1065         iobase = self->io.sir_base;
1066
1067         /* Come from MIR or FIR speed */
1068         if(self->io.speed >115200)
1069         {
1070                 // Set Dongle Speed mode first
1071                 ali_ircc_change_dongle_speed(self, speed);
1072
1073                 FIR2SIR(iobase);
1074         }
1075
1076         // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1077
1078         inb(iobase+UART_LSR);
1079         inb(iobase+UART_SCR);
1080
1081         /* Update accounting for new speed */
1082         self->io.speed = speed;
1083
1084         spin_lock_irqsave(&self->lock, flags);
1085
1086         divisor = 115200/speed;
1087
1088         fcr = UART_FCR_ENABLE_FIFO;
1089
1090         /*
1091          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1092          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1093          * about this timeout since it will always be fast enough.
1094          */
1095         if (self->io.speed < 38400)
1096                 fcr |= UART_FCR_TRIGGER_1;
1097         else
1098                 fcr |= UART_FCR_TRIGGER_14;
1099
1100         /* IrDA ports use 8N1 */
1101         lcr = UART_LCR_WLEN8;
1102
1103         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1104         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1105         outb(divisor >> 8,        iobase+UART_DLM);
1106         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1107         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1108
1109         /* without this, the conection will be broken after come back from FIR speed,
1110            but with this, the SIR connection is harder to established */
1111         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1112
1113         spin_unlock_irqrestore(&self->lock, flags);
1114
1115         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1116 }
1117
1118 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1119 {
1120
1121         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1122         int iobase,dongle_id;
1123         int tmp = 0;
1124
1125         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1126
1127         iobase = self->io.fir_base;     /* or iobase = self->io.sir_base; */
1128         dongle_id = self->io.dongle_id;
1129
1130         /* We are already locked, no need to do it again */
1131
1132         IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);
1133
1134         switch_bank(iobase, BANK2);
1135         tmp = inb(iobase+FIR_IRDA_CR);
1136
1137         /* IBM type dongle */
1138         if(dongle_id == 0)
1139         {
1140                 if(speed == 4000000)
1141                 {
1142                         //            __ __
1143                         // SD/MODE __|     |__ __
1144                         //               __ __
1145                         // IRTX    __ __|     |__
1146                         //         T1 T2 T3 T4 T5
1147
1148                         tmp &=  ~IRDA_CR_HDLC;          // HDLC=0
1149                         tmp |= IRDA_CR_CRC;             // CRC=1
1150
1151                         switch_bank(iobase, BANK2);
1152                         outb(tmp, iobase+FIR_IRDA_CR);
1153
1154                         // T1 -> SD/MODE:0 IRTX:0
1155                         tmp &= ~0x09;
1156                         tmp |= 0x02;
1157                         outb(tmp, iobase+FIR_IRDA_CR);
1158                         udelay(2);
1159
1160                         // T2 -> SD/MODE:1 IRTX:0
1161                         tmp &= ~0x01;
1162                         tmp |= 0x0a;
1163                         outb(tmp, iobase+FIR_IRDA_CR);
1164                         udelay(2);
1165
1166                         // T3 -> SD/MODE:1 IRTX:1
1167                         tmp |= 0x0b;
1168                         outb(tmp, iobase+FIR_IRDA_CR);
1169                         udelay(2);
1170
1171                         // T4 -> SD/MODE:0 IRTX:1
1172                         tmp &= ~0x08;
1173                         tmp |= 0x03;
1174                         outb(tmp, iobase+FIR_IRDA_CR);
1175                         udelay(2);
1176
1177                         // T5 -> SD/MODE:0 IRTX:0
1178                         tmp &= ~0x09;
1179                         tmp |= 0x02;
1180                         outb(tmp, iobase+FIR_IRDA_CR);
1181                         udelay(2);
1182
1183                         // reset -> Normal TX output Signal
1184                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1185                 }
1186                 else /* speed <=1152000 */
1187                 {
1188                         //            __
1189                         // SD/MODE __|  |__
1190                         //
1191                         // IRTX    ________
1192                         //         T1 T2 T3
1193
1194                         /* MIR 115200, 57600 */
1195                         if (speed==1152000)
1196                         {
1197                                 tmp |= 0xA0;       //HDLC=1, 1.152Mbps=1
1198                         }
1199                         else
1200                         {
1201                                 tmp &=~0x80;       //HDLC 0.576Mbps
1202                                 tmp |= 0x20;       //HDLC=1,
1203                         }
1204
1205                         tmp |= IRDA_CR_CRC;             // CRC=1
1206
1207                         switch_bank(iobase, BANK2);
1208                         outb(tmp, iobase+FIR_IRDA_CR);
1209
1210                         /* MIR 115200, 57600 */
1211
1212                         //switch_bank(iobase, BANK2);
1213                         // T1 -> SD/MODE:0 IRTX:0
1214                         tmp &= ~0x09;
1215                         tmp |= 0x02;
1216                         outb(tmp, iobase+FIR_IRDA_CR);
1217                         udelay(2);
1218
1219                         // T2 -> SD/MODE:1 IRTX:0
1220                         tmp &= ~0x01;
1221                         tmp |= 0x0a;
1222                         outb(tmp, iobase+FIR_IRDA_CR);
1223
1224                         // T3 -> SD/MODE:0 IRTX:0
1225                         tmp &= ~0x09;
1226                         tmp |= 0x02;
1227                         outb(tmp, iobase+FIR_IRDA_CR);
1228                         udelay(2);
1229
1230                         // reset -> Normal TX output Signal
1231                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1232                 }
1233         }
1234         else if (dongle_id == 1) /* HP HDSL-3600 */
1235         {
1236                 switch(speed)
1237                 {
1238                 case 4000000:
1239                         tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1240                         break;
1241
1242                 case 1152000:
1243                         tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1244                         break;
1245
1246                 case 576000:
1247                         tmp &=~0x80;            // HDLC 0.576Mbps
1248                         tmp |= 0x20;            // HDLC=1,
1249                         break;
1250                 }
1251
1252                 tmp |= IRDA_CR_CRC;             // CRC=1
1253
1254                 switch_bank(iobase, BANK2);
1255                 outb(tmp, iobase+FIR_IRDA_CR);
1256         }
1257         else /* HP HDSL-1100 */
1258         {
1259                 if(speed <= 115200) /* SIR */
1260                 {
1261
1262                         tmp &= ~IRDA_CR_FIR_SIN;        // HP sin select = 0
1263
1264                         switch_bank(iobase, BANK2);
1265                         outb(tmp, iobase+FIR_IRDA_CR);
1266                 }
1267                 else /* MIR FIR */
1268                 {
1269
1270                         switch(speed)
1271                         {
1272                         case 4000000:
1273                                 tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1274                                 break;
1275
1276                         case 1152000:
1277                                 tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1278                                 break;
1279
1280                         case 576000:
1281                                 tmp &=~0x80;            // HDLC 0.576Mbps
1282                                 tmp |= 0x20;            // HDLC=1,
1283                                 break;
1284                         }
1285
1286                         tmp |= IRDA_CR_CRC;             // CRC=1
1287                         tmp |= IRDA_CR_FIR_SIN;         // HP sin select = 1
1288
1289                         switch_bank(iobase, BANK2);
1290                         outb(tmp, iobase+FIR_IRDA_CR);
1291                 }
1292         }
1293
1294         switch_bank(iobase, BANK0);
1295
1296         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1297 }
1298
1299 /*
1300  * Function ali_ircc_sir_write (driver)
1301  *
1302  *    Fill Tx FIFO with transmit data
1303  *
1304  */
1305 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1306 {
1307         int actual = 0;
1308
1309         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1310
1311         /* Tx FIFO should be empty! */
1312         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1313                 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1314                 return 0;
1315         }
1316
1317         /* Fill FIFO with current frame */
1318         while ((fifo_size-- > 0) && (actual < len)) {
1319                 /* Transmit next byte */
1320                 outb(buf[actual], iobase+UART_TX);
1321
1322                 actual++;
1323         }
1324
1325         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1326         return actual;
1327 }
1328
1329 /*
1330  * Function ali_ircc_net_open (dev)
1331  *
1332  *    Start the device
1333  *
1334  */
1335 static int ali_ircc_net_open(struct net_device *dev)
1336 {
1337         struct ali_ircc_cb *self;
1338         int iobase;
1339         char hwname[32];
1340
1341         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1342
1343         IRDA_ASSERT(dev != NULL, return -1;);
1344
1345         self = (struct ali_ircc_cb *) dev->priv;
1346
1347         IRDA_ASSERT(self != NULL, return 0;);
1348
1349         iobase = self->io.fir_base;
1350
1351         /* Request IRQ and install Interrupt Handler */
1352         if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1353         {
1354                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1355                              ALI_IRCC_DRIVER_NAME,
1356                              self->io.irq);
1357                 return -EAGAIN;
1358         }
1359
1360         /*
1361          * Always allocate the DMA channel after the IRQ, and clean up on
1362          * failure.
1363          */
1364         if (request_dma(self->io.dma, dev->name)) {
1365                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1366                              ALI_IRCC_DRIVER_NAME,
1367                              self->io.dma);
1368                 free_irq(self->io.irq, self);
1369                 return -EAGAIN;
1370         }
1371
1372         /* Turn on interrups */
1373         outb(UART_IER_RDI , iobase+UART_IER);
1374
1375         /* Ready to play! */
1376         netif_start_queue(dev); //benjamin by irport
1377
1378         /* Give self a hardware name */
1379         sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1380
1381         /*
1382          * Open new IrLAP layer instance, now that everything should be
1383          * initialized properly
1384          */
1385         self->irlap = irlap_open(dev, &self->qos, hwname);
1386
1387         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1388
1389         return 0;
1390 }
1391
1392 /*
1393  * Function ali_ircc_net_close (dev)
1394  *
1395  *    Stop the device
1396  *
1397  */
1398 static int ali_ircc_net_close(struct net_device *dev)
1399 {
1400
1401         struct ali_ircc_cb *self;
1402         //int iobase;
1403
1404         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1405
1406         IRDA_ASSERT(dev != NULL, return -1;);
1407
1408         self = (struct ali_ircc_cb *) dev->priv;
1409         IRDA_ASSERT(self != NULL, return 0;);
1410
1411         /* Stop device */
1412         netif_stop_queue(dev);
1413
1414         /* Stop and remove instance of IrLAP */
1415         if (self->irlap)
1416                 irlap_close(self->irlap);
1417         self->irlap = NULL;
1418
1419         disable_dma(self->io.dma);
1420
1421         /* Disable interrupts */
1422         SetCOMInterrupts(self, FALSE);
1423
1424         free_irq(self->io.irq, dev);
1425         free_dma(self->io.dma);
1426
1427         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1428
1429         return 0;
1430 }
1431
1432 /*
1433  * Function ali_ircc_fir_hard_xmit (skb, dev)
1434  *
1435  *    Transmit the frame
1436  *
1437  */
1438 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1439 {
1440         struct ali_ircc_cb *self;
1441         unsigned long flags;
1442         int iobase;
1443         __u32 speed;
1444         int mtt, diff;
1445
1446         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1447
1448         self = (struct ali_ircc_cb *) dev->priv;
1449         iobase = self->io.fir_base;
1450
1451         netif_stop_queue(dev);
1452
1453         /* Make sure tests *& speed change are atomic */
1454         spin_lock_irqsave(&self->lock, flags);
1455
1456         /* Note : you should make sure that speed changes are not going
1457          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1458          * details - Jean II */
1459
1460         /* Check if we need to change the speed */
1461         speed = irda_get_next_speed(skb);
1462         if ((speed != self->io.speed) && (speed != -1)) {
1463                 /* Check for empty frame */
1464                 if (!skb->len) {
1465                         ali_ircc_change_speed(self, speed);
1466                         dev->trans_start = jiffies;
1467                         spin_unlock_irqrestore(&self->lock, flags);
1468                         dev_kfree_skb(skb);
1469                         return 0;
1470                 } else
1471                         self->new_speed = speed;
1472         }
1473
1474         /* Register and copy this frame to DMA memory */
1475         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1476         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1477         self->tx_fifo.tail += skb->len;
1478
1479         self->stats.tx_bytes += skb->len;
1480
1481         memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
1482                skb->len);
1483
1484         self->tx_fifo.len++;
1485         self->tx_fifo.free++;
1486
1487         /* Start transmit only if there is currently no transmit going on */
1488         if (self->tx_fifo.len == 1)
1489         {
1490                 /* Check if we must wait the min turn time or not */
1491                 mtt = irda_get_mtt(skb);
1492
1493                 if (mtt)
1494                 {
1495                         /* Check how much time we have used already */
1496                         do_gettimeofday(&self->now);
1497
1498                         diff = self->now.tv_usec - self->stamp.tv_usec;
1499                         /* self->stamp is set from ali_ircc_dma_receive_complete() */
1500
1501                         IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);
1502
1503                         if (diff < 0)
1504                                 diff += 1000000;
1505
1506                         /* Check if the mtt is larger than the time we have
1507                          * already used by all the protocol processing
1508                          */
1509                         if (mtt > diff)
1510                         {
1511                                 mtt -= diff;
1512
1513                                 /*
1514                                  * Use timer if delay larger than 1000 us, and
1515                                  * use udelay for smaller values which should
1516                                  * be acceptable
1517                                  */
1518                                 if (mtt > 500)
1519                                 {
1520                                         /* Adjust for timer resolution */
1521                                         mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
1522
1523                                         IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);
1524
1525                                         /* Setup timer */
1526                                         if (mtt == 1) /* 500 us */
1527                                         {
1528                                                 switch_bank(iobase, BANK1);
1529                                                 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1530                                         }
1531                                         else if (mtt == 2) /* 1 ms */
1532                                         {
1533                                                 switch_bank(iobase, BANK1);
1534                                                 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1535                                         }
1536                                         else /* > 2ms -> 4ms */
1537                                         {
1538                                                 switch_bank(iobase, BANK1);
1539                                                 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1540                                         }
1541
1542
1543                                         /* Start timer */
1544                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1545                                         self->io.direction = IO_XMIT;
1546
1547                                         /* Enable timer interrupt */
1548                                         self->ier = IER_TIMER;
1549                                         SetCOMInterrupts(self, TRUE);
1550
1551                                         /* Timer will take care of the rest */
1552                                         goto out;
1553                                 }
1554                                 else
1555                                         udelay(mtt);
1556                         } // if (if (mtt > diff)
1557                 }// if (mtt)
1558
1559                 /* Enable EOM interrupt */
1560                 self->ier = IER_EOM;
1561                 SetCOMInterrupts(self, TRUE);
1562
1563                 /* Transmit frame */
1564                 ali_ircc_dma_xmit(self);
1565         } // if (self->tx_fifo.len == 1)
1566
1567  out:
1568
1569         /* Not busy transmitting anymore if window is not full */
1570         if (self->tx_fifo.free < MAX_TX_WINDOW)
1571                 netif_wake_queue(self->netdev);
1572
1573         /* Restore bank register */
1574         switch_bank(iobase, BANK0);
1575
1576         dev->trans_start = jiffies;
1577         spin_unlock_irqrestore(&self->lock, flags);
1578         dev_kfree_skb(skb);
1579
1580         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1581         return 0;
1582 }
1583
1584
1585 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1586 {
1587         int iobase, tmp;
1588         unsigned char FIFO_OPTI, Hi, Lo;
1589
1590
1591         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1592
1593         iobase = self->io.fir_base;
1594
1595         /* FIFO threshold , this method comes from NDIS5 code */
1596
1597         if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1598                 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1599         else
1600                 FIFO_OPTI = TX_FIFO_Threshold;
1601
1602         /* Disable DMA */
1603         switch_bank(iobase, BANK1);
1604         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1605
1606         self->io.direction = IO_XMIT;
1607
1608         irda_setup_dma(self->io.dma,
1609                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1610                         self->tx_buff.head) + self->tx_buff_dma,
1611                        self->tx_fifo.queue[self->tx_fifo.ptr].len,
1612                        DMA_TX_MODE);
1613
1614         /* Reset Tx FIFO */
1615         switch_bank(iobase, BANK0);
1616         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1617
1618         /* Set Tx FIFO threshold */
1619         if (self->fifo_opti_buf!=FIFO_OPTI)
1620         {
1621                 switch_bank(iobase, BANK1);
1622                 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1623                 self->fifo_opti_buf=FIFO_OPTI;
1624         }
1625
1626         /* Set Tx DMA threshold */
1627         switch_bank(iobase, BANK1);
1628         outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1629
1630         /* Set max Tx frame size */
1631         Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1632         Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1633         switch_bank(iobase, BANK2);
1634         outb(Hi, iobase+FIR_TX_DSR_HI);
1635         outb(Lo, iobase+FIR_TX_DSR_LO);
1636
1637         /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1638         switch_bank(iobase, BANK0);
1639         tmp = inb(iobase+FIR_LCR_B);
1640         tmp &= ~0x20; // Disable SIP
1641         outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1642         IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1643
1644         outb(0, iobase+FIR_LSR);
1645
1646         /* Enable DMA and Burst Mode */
1647         switch_bank(iobase, BANK1);
1648         outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1649
1650         switch_bank(iobase, BANK0);
1651
1652         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1653 }
1654
1655 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1656 {
1657         int iobase;
1658         int ret = TRUE;
1659
1660         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1661
1662         iobase = self->io.fir_base;
1663
1664         /* Disable DMA */
1665         switch_bank(iobase, BANK1);
1666         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1667
1668         /* Check for underrun! */
1669         switch_bank(iobase, BANK0);
1670         if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1671
1672         {
1673                 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);
1674                 self->stats.tx_errors++;
1675                 self->stats.tx_fifo_errors++;
1676         }
1677         else
1678         {
1679                 self->stats.tx_packets++;
1680         }
1681
1682         /* Check if we need to change the speed */
1683         if (self->new_speed)
1684         {
1685                 ali_ircc_change_speed(self, self->new_speed);
1686                 self->new_speed = 0;
1687         }
1688
1689         /* Finished with this frame, so prepare for next */
1690         self->tx_fifo.ptr++;
1691         self->tx_fifo.len--;
1692
1693         /* Any frames to be sent back-to-back? */
1694         if (self->tx_fifo.len)
1695         {
1696                 ali_ircc_dma_xmit(self);
1697
1698                 /* Not finished yet! */
1699                 ret = FALSE;
1700         }
1701         else
1702         {       /* Reset Tx FIFO info */
1703                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1704                 self->tx_fifo.tail = self->tx_buff.head;
1705         }
1706
1707         /* Make sure we have room for more frames */
1708         if (self->tx_fifo.free < MAX_TX_WINDOW) {
1709                 /* Not busy transmitting anymore */
1710                 /* Tell the network layer, that we can accept more frames */
1711                 netif_wake_queue(self->netdev);
1712         }
1713
1714         switch_bank(iobase, BANK0);
1715
1716         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1717         return ret;
1718 }
1719
1720 /*
1721  * Function ali_ircc_dma_receive (self)
1722  *
1723  *    Get ready for receiving a frame. The device will initiate a DMA
1724  *    if it starts to receive a frame.
1725  *
1726  */
1727 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1728 {
1729         int iobase, tmp;
1730
1731         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1732
1733         iobase = self->io.fir_base;
1734
1735         /* Reset Tx FIFO info */
1736         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1737         self->tx_fifo.tail = self->tx_buff.head;
1738
1739         /* Disable DMA */
1740         switch_bank(iobase, BANK1);
1741         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1742
1743         /* Reset Message Count */
1744         switch_bank(iobase, BANK0);
1745         outb(0x07, iobase+FIR_LSR);
1746
1747         self->rcvFramesOverflow = FALSE;
1748
1749         self->LineStatus = inb(iobase+FIR_LSR) ;
1750
1751         /* Reset Rx FIFO info */
1752         self->io.direction = IO_RECV;
1753         self->rx_buff.data = self->rx_buff.head;
1754
1755         /* Reset Rx FIFO */
1756         // switch_bank(iobase, BANK0);
1757         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1758
1759         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1760         self->st_fifo.tail = self->st_fifo.head = 0;
1761
1762         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1763                        DMA_RX_MODE);
1764
1765         /* Set Receive Mode,Brick Wall */
1766         //switch_bank(iobase, BANK0);
1767         tmp = inb(iobase+FIR_LCR_B);
1768         outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1769         IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1770
1771         /* Set Rx Threshold */
1772         switch_bank(iobase, BANK1);
1773         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1774         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1775
1776         /* Enable DMA and Burst Mode */
1777         // switch_bank(iobase, BANK1);
1778         outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1779
1780         switch_bank(iobase, BANK0);
1781         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1782         return 0;
1783 }
1784
1785 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1786 {
1787         struct st_fifo *st_fifo;
1788         struct sk_buff *skb;
1789         __u8 status, MessageCount;
1790         int len, i, iobase, val;
1791
1792         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1793
1794         st_fifo = &self->st_fifo;
1795         iobase = self->io.fir_base;
1796
1797         switch_bank(iobase, BANK0);
1798         MessageCount = inb(iobase+ FIR_LSR)&0x07;
1799
1800         if (MessageCount > 0)
1801                 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);
1802
1803         for (i=0; i<=MessageCount; i++)
1804         {
1805                 /* Bank 0 */
1806                 switch_bank(iobase, BANK0);
1807                 status = inb(iobase+FIR_LSR);
1808
1809                 switch_bank(iobase, BANK2);
1810                 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1811                 len = len << 8;
1812                 len |= inb(iobase+FIR_RX_DSR_LO);
1813
1814                 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);
1815                 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1816
1817                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1818                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1819                         continue;
1820                 }
1821
1822                 st_fifo->entries[st_fifo->tail].status = status;
1823                 st_fifo->entries[st_fifo->tail].len = len;
1824                 st_fifo->pending_bytes += len;
1825                 st_fifo->tail++;
1826                 st_fifo->len++;
1827         }
1828
1829         for (i=0; i<=MessageCount; i++)
1830         {
1831                 /* Get first entry */
1832                 status = st_fifo->entries[st_fifo->head].status;
1833                 len    = st_fifo->entries[st_fifo->head].len;
1834                 st_fifo->pending_bytes -= len;
1835                 st_fifo->head++;
1836                 st_fifo->len--;
1837
1838                 /* Check for errors */
1839                 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1840                 {
1841                         IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );
1842
1843                         /* Skip frame */
1844                         self->stats.rx_errors++;
1845
1846                         self->rx_buff.data += len;
1847
1848                         if (status & LSR_FIFO_UR)
1849                         {
1850                                 self->stats.rx_frame_errors++;
1851                                 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1852                         }
1853                         if (status & LSR_FRAME_ERROR)
1854                         {
1855                                 self->stats.rx_frame_errors++;
1856                                 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1857                         }
1858
1859                         if (status & LSR_CRC_ERROR)
1860                         {
1861                                 self->stats.rx_crc_errors++;
1862                                 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1863                         }
1864
1865                         if(self->rcvFramesOverflow)
1866                         {
1867                                 self->stats.rx_frame_errors++;
1868                                 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );
1869                         }
1870                         if(len == 0)
1871                         {
1872                                 self->stats.rx_frame_errors++;
1873                                 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1874                         }
1875                 }
1876                 else
1877                 {
1878
1879                         if (st_fifo->pending_bytes < 32)
1880                         {
1881                                 switch_bank(iobase, BANK0);
1882                                 val = inb(iobase+FIR_BSR);
1883                                 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1884                                 {
1885                                         IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1886
1887                                         /* Put this entry back in fifo */
1888                                         st_fifo->head--;
1889                                         st_fifo->len++;
1890                                         st_fifo->pending_bytes += len;
1891                                         st_fifo->entries[st_fifo->head].status = status;
1892                                         st_fifo->entries[st_fifo->head].len = len;
1893
1894                                         /*
1895                                         * DMA not finished yet, so try again
1896                                         * later, set timer value, resolution
1897                                         * 500 us
1898                                         */
1899
1900                                         switch_bank(iobase, BANK1);
1901                                         outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1902
1903                                         /* Enable Timer */
1904                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1905
1906                                         return FALSE; /* I'll be back! */
1907                                 }
1908                         }
1909
1910                         /*
1911                          * Remember the time we received this frame, so we can
1912                          * reduce the min turn time a bit since we will know
1913                          * how much time we have used for protocol processing
1914                          */
1915                         do_gettimeofday(&self->stamp);
1916
1917                         skb = dev_alloc_skb(len+1);
1918                         if (skb == NULL)
1919                         {
1920                                 IRDA_WARNING("%s(), memory squeeze, "
1921                                              "dropping frame.\n",
1922                                              __FUNCTION__);
1923                                 self->stats.rx_dropped++;
1924
1925                                 return FALSE;
1926                         }
1927
1928                         /* Make sure IP header gets aligned */
1929                         skb_reserve(skb, 1);
1930
1931                         /* Copy frame without CRC, CRC is removed by hardware*/
1932                         skb_put(skb, len);
1933                         memcpy(skb->data, self->rx_buff.data, len);
1934
1935                         /* Move to next frame */
1936                         self->rx_buff.data += len;
1937                         self->stats.rx_bytes += len;
1938                         self->stats.rx_packets++;
1939
1940                         skb->dev = self->netdev;
1941                         skb->mac.raw  = skb->data;
1942                         skb->protocol = htons(ETH_P_IRDA);
1943                         netif_rx(skb);
1944                         self->netdev->last_rx = jiffies;
1945                 }
1946         }
1947
1948         switch_bank(iobase, BANK0);
1949
1950         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1951         return TRUE;
1952 }
1953
1954
1955
1956 /*
1957  * Function ali_ircc_sir_hard_xmit (skb, dev)
1958  *
1959  *    Transmit the frame!
1960  *
1961  */
1962 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1963 {
1964         struct ali_ircc_cb *self;
1965         unsigned long flags;
1966         int iobase;
1967         __u32 speed;
1968
1969         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1970
1971         IRDA_ASSERT(dev != NULL, return 0;);
1972
1973         self = (struct ali_ircc_cb *) dev->priv;
1974         IRDA_ASSERT(self != NULL, return 0;);
1975
1976         iobase = self->io.sir_base;
1977
1978         netif_stop_queue(dev);
1979
1980         /* Make sure tests *& speed change are atomic */
1981         spin_lock_irqsave(&self->lock, flags);
1982
1983         /* Note : you should make sure that speed changes are not going
1984          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1985          * details - Jean II */
1986
1987         /* Check if we need to change the speed */
1988         speed = irda_get_next_speed(skb);
1989         if ((speed != self->io.speed) && (speed != -1)) {
1990                 /* Check for empty frame */
1991                 if (!skb->len) {
1992                         ali_ircc_change_speed(self, speed);
1993                         dev->trans_start = jiffies;
1994                         spin_unlock_irqrestore(&self->lock, flags);
1995                         dev_kfree_skb(skb);
1996                         return 0;
1997                 } else
1998                         self->new_speed = speed;
1999         }
2000
2001         /* Init tx buffer */
2002         self->tx_buff.data = self->tx_buff.head;
2003
2004         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
2005         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
2006                                            self->tx_buff.truesize);
2007
2008         self->stats.tx_bytes += self->tx_buff.len;
2009
2010         /* Turn on transmit finished interrupt. Will fire immediately!  */
2011         outb(UART_IER_THRI, iobase+UART_IER);
2012
2013         dev->trans_start = jiffies;
2014         spin_unlock_irqrestore(&self->lock, flags);
2015
2016         dev_kfree_skb(skb);
2017
2018         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2019
2020         return 0;
2021 }
2022
2023
2024 /*
2025  * Function ali_ircc_net_ioctl (dev, rq, cmd)
2026  *
2027  *    Process IOCTL commands for this device
2028  *
2029  */
2030 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2031 {
2032         struct if_irda_req *irq = (struct if_irda_req *) rq;
2033         struct ali_ircc_cb *self;
2034         unsigned long flags;
2035         int ret = 0;
2036
2037         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2038
2039         IRDA_ASSERT(dev != NULL, return -1;);
2040
2041         self = dev->priv;
2042
2043         IRDA_ASSERT(self != NULL, return -1;);
2044
2045         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2046
2047         switch (cmd) {
2048         case SIOCSBANDWIDTH: /* Set bandwidth */
2049                 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2050                 /*
2051                  * This function will also be used by IrLAP to change the
2052                  * speed, so we still must allow for speed change within
2053                  * interrupt context.
2054                  */
2055                 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2056                         return -EPERM;
2057
2058                 spin_lock_irqsave(&self->lock, flags);
2059                 ali_ircc_change_speed(self, irq->ifr_baudrate);
2060                 spin_unlock_irqrestore(&self->lock, flags);
2061                 break;
2062         case SIOCSMEDIABUSY: /* Set media busy */
2063                 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2064                 if (!capable(CAP_NET_ADMIN))
2065                         return -EPERM;
2066                 irda_device_set_media_busy(self->netdev, TRUE);
2067                 break;
2068         case SIOCGRECEIVING: /* Check if we are receiving right now */
2069                 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2070                 /* This is protected */
2071                 irq->ifr_receiving = ali_ircc_is_receiving(self);
2072                 break;
2073         default:
2074                 ret = -EOPNOTSUPP;
2075         }
2076
2077         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2078
2079         return ret;
2080 }
2081
2082 /*
2083  * Function ali_ircc_is_receiving (self)
2084  *
2085  *    Return TRUE is we are currently receiving a frame
2086  *
2087  */
2088 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2089 {
2090         unsigned long flags;
2091         int status = FALSE;
2092         int iobase;
2093
2094         IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2095
2096         IRDA_ASSERT(self != NULL, return FALSE;);
2097
2098         spin_lock_irqsave(&self->lock, flags);
2099
2100         if (self->io.speed > 115200)
2101         {
2102                 iobase = self->io.fir_base;
2103
2104                 switch_bank(iobase, BANK1);
2105                 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2106                 {
2107                         /* We are receiving something */
2108                         IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2109                         status = TRUE;
2110                 }
2111                 switch_bank(iobase, BANK0);
2112         }
2113         else
2114         {
2115                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2116         }
2117
2118         spin_unlock_irqrestore(&self->lock, flags);
2119
2120         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2121
2122         return status;
2123 }
2124
2125 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2126 {
2127         struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2128
2129         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2130
2131         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2132
2133         return &self->stats;
2134 }
2135
2136 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2137 {
2138         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2139
2140         IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2141
2142         if (self->io.suspended)
2143                 return 0;
2144
2145         ali_ircc_net_close(self->netdev);
2146
2147         self->io.suspended = 1;
2148
2149         return 0;
2150 }
2151
2152 static int ali_ircc_resume(struct platform_device *dev)
2153 {
2154         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2155
2156         if (!self->io.suspended)
2157                 return 0;
2158
2159         ali_ircc_net_open(self->netdev);
2160
2161         IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2162
2163         self->io.suspended = 0;
2164
2165         return 0;
2166 }
2167
2168 /* ALi Chip Function */
2169
2170 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2171 {
2172
2173         unsigned char newMask;
2174
2175         int iobase = self->io.fir_base; /* or sir_base */
2176
2177         IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);
2178
2179         /* Enable the interrupt which we wish to */
2180         if (enable){
2181                 if (self->io.direction == IO_XMIT)
2182                 {
2183                         if (self->io.speed > 115200) /* FIR, MIR */
2184                         {
2185                                 newMask = self->ier;
2186                         }
2187                         else /* SIR */
2188                         {
2189                                 newMask = UART_IER_THRI | UART_IER_RDI;
2190                         }
2191                 }
2192                 else {
2193                         if (self->io.speed > 115200) /* FIR, MIR */
2194                         {
2195                                 newMask = self->ier;
2196                         }
2197                         else /* SIR */
2198                         {
2199                                 newMask = UART_IER_RDI;
2200                         }
2201                 }
2202         }
2203         else /* Disable all the interrupts */
2204         {
2205                 newMask = 0x00;
2206
2207         }
2208
2209         //SIR and FIR has different registers
2210         if (self->io.speed > 115200)
2211         {
2212                 switch_bank(iobase, BANK0);
2213                 outb(newMask, iobase+FIR_IER);
2214         }
2215         else
2216                 outb(newMask, iobase+UART_IER);
2217
2218         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2219 }
2220
2221 static void SIR2FIR(int iobase)
2222 {
2223         //unsigned char tmp;
2224
2225         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2226
2227         /* Already protected (change_speed() or setup()), no need to lock.
2228          * Jean II */
2229
2230         outb(0x28, iobase+UART_MCR);
2231         outb(0x68, iobase+UART_MCR);
2232         outb(0x88, iobase+UART_MCR);
2233
2234         outb(0x60, iobase+FIR_MCR);     /*  Master Reset */
2235         outb(0x20, iobase+FIR_MCR);     /*  Master Interrupt Enable */
2236
2237         //tmp = inb(iobase+FIR_LCR_B);  /* SIP enable */
2238         //tmp |= 0x20;
2239         //outb(tmp, iobase+FIR_LCR_B);
2240
2241         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2242 }
2243
2244 static void FIR2SIR(int iobase)
2245 {
2246         unsigned char val;
2247
2248         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2249
2250         /* Already protected (change_speed() or setup()), no need to lock.
2251          * Jean II */
2252
2253         outb(0x20, iobase+FIR_MCR);     /* IRQ to low */
2254         outb(0x00, iobase+UART_IER);
2255
2256         outb(0xA0, iobase+FIR_MCR);     /* Don't set master reset */
2257         outb(0x00, iobase+UART_FCR);
2258         outb(0x07, iobase+UART_FCR);
2259
2260         val = inb(iobase+UART_RX);
2261         val = inb(iobase+UART_LSR);
2262         val = inb(iobase+UART_MSR);
2263
2264         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2265 }
2266
2267 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2268 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2269 MODULE_LICENSE("GPL");
2270
2271
2272 module_param_array(io, int, NULL, 0);
2273 MODULE_PARM_DESC(io, "Base I/O addresses");
2274 module_param_array(irq, int, NULL, 0);
2275 MODULE_PARM_DESC(irq, "IRQ lines");
2276 module_param_array(dma, int, NULL, 0);
2277 MODULE_PARM_DESC(dma, "DMA channels");
2278
2279 module_init(ali_ircc_init);
2280 module_exit(ali_ircc_cleanup);