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