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ali-ircc.c

/*********************************************************************
 *                
 * Filename:      ali-ircc.h
 * Version:       0.5
 * Description:   Driver for the ALI M1535D and M1543C FIR Controller
 * Status:        Experimental.
 * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
 * Created at:    2000/10/16 03:46PM
 * Modified at:   2001/1/3 02:55PM
 * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
 * Modified at:   2003/11/6 and support for ALi south-bridge chipsets M1563
 * Modified by:   Clear Zhang <clear_zhang@ali.com.tw>
 * 
 *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
 *     All Rights Reserved
 *      
 *     This program is free software; you can redistribute it and/or 
 *     modify it under the terms of the GNU General Public License as 
 *     published by the Free Software Foundation; either version 2 of 
 *     the License, or (at your option) any later version.
 *  
 ********************************************************************/

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
#include <linux/serial_reg.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>

#include "ali-ircc.h"

#define CHIP_IO_EXTENT 8
#define BROKEN_DONGLE_ID

#define ALI_IRCC_DRIVER_NAME "ali-ircc"

/* Power Management */
static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
static int ali_ircc_resume(struct platform_device *dev);

static struct platform_driver ali_ircc_driver = {
      .suspend    = ali_ircc_suspend,
      .resume           = ali_ircc_resume,
      .driver           = {
            .name = ALI_IRCC_DRIVER_NAME,
      },
};

/* Module parameters */
static int qos_mtt_bits = 0x07;  /* 1 ms or more */

/* Use BIOS settions by default, but user may supply module parameters */
static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
static unsigned int irq[] = { 0, 0, 0, 0 };
static unsigned int dma[] = { 0, 0, 0, 0 };

static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);

/* These are the currently known ALi sourth-bridge chipsets, the only one difference
 * is that M1543C doesn't support HP HDSL-3600
 */
static ali_chip_t chips[] =
{
      { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
      { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
      { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
      { NULL }
};

/* Max 4 instances for now */
static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };

/* Dongle Types */
static char *dongle_types[] = {
      "TFDS6000",
      "HP HSDL-3600",
      "HP HSDL-1100",   
      "No dongle connected",
};

/* Some prototypes */
static int  ali_ircc_open(int i, chipio_t *info);

static int  ali_ircc_close(struct ali_ircc_cb *self);

static int  ali_ircc_setup(chipio_t *info);
static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
static int  ali_ircc_net_open(struct net_device *dev);
static int  ali_ircc_net_close(struct net_device *dev);
static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);

/* SIR function */
static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);

/* FIR function */
static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
static int  ali_ircc_dma_receive(struct ali_ircc_cb *self); 
static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);

/* My Function */
static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);

/* ALi chip function */
static void SIR2FIR(int iobase);
static void FIR2SIR(int iobase);
static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);

/*
 * Function ali_ircc_init ()
 *
 *    Initialize chip. Find out whay kinds of chips we are dealing with
 *    and their configuation registers address
 */
static int __init ali_ircc_init(void)
{
      ali_chip_t *chip;
      chipio_t info;
      int ret;
      int cfg, cfg_base;
      int reg, revision;
      int i = 0;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);

      ret = platform_driver_register(&ali_ircc_driver);
        if (ret) {
                IRDA_ERROR("%s, Can't register driver!\n",
                     ALI_IRCC_DRIVER_NAME);
                return ret;
        }

      ret = -ENODEV;
      
      /* Probe for all the ALi chipsets we know about */
      for (chip= chips; chip->name; chip++, i++) 
      {
            IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
                        
            /* Try all config registers for this chip */
            for (cfg=0; cfg<2; cfg++)
            {
                  cfg_base = chip->cfg[cfg];
                  if (!cfg_base)
                        continue;
                        
                  memset(&info, 0, sizeof(chipio_t));
                  info.cfg_base = cfg_base;
                  info.fir_base = io[i];
                  info.dma = dma[i];
                  info.irq = irq[i];
                  
                  
                  /* Enter Configuration */
                  outb(chip->entr1, cfg_base);
                  outb(chip->entr2, cfg_base);
                  
                  /* Select Logical Device 5 Registers (UART2) */
                  outb(0x07, cfg_base);
                  outb(0x05, cfg_base+1);
                  
                  /* Read Chip Identification Register */
                  outb(chip->cid_index, cfg_base);    
                  reg = inb(cfg_base+1);  
                        
                  if (reg == chip->cid_value)
                  {
                        IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
                                 
                        outb(0x1F, cfg_base);
                        revision = inb(cfg_base+1);
                        IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
                                 chip->name, revision);                             
                        
                        /* 
                         * If the user supplies the base address, then
                         * we init the chip, if not we probe the values
                         * set by the BIOS
                         */                     
                        if (io[i] < 2000)
                        {
                              chip->init(chip, &info);
                        }
                        else
                        {
                              chip->probe(chip, &info);     
                        }
                        
                        if (ali_ircc_open(i, &info) == 0)
                              ret = 0;
                        i++;                    
                  }
                  else
                  {
                        IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
                  }
                  /* Exit configuration */
                  outb(0xbb, cfg_base);
            }
      }           
            
      IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);                                         

      if (ret)
            platform_driver_unregister(&ali_ircc_driver);

      return ret;
}

/*
 * Function ali_ircc_cleanup ()
 *
 *    Close all configured chips
 *
 */
static void __exit ali_ircc_cleanup(void)
{
      int i;

      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);     

      for (i=0; i < ARRAY_SIZE(dev_self); i++) {
            if (dev_self[i])
                  ali_ircc_close(dev_self[i]);
      }
      
      platform_driver_unregister(&ali_ircc_driver);

      IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
}

/*
 * Function ali_ircc_open (int i, chipio_t *inf)
 *
 *    Open driver instance
 *
 */
static int ali_ircc_open(int i, chipio_t *info)
{
      struct net_device *dev;
      struct ali_ircc_cb *self;
      int dongle_id;
      int err;
                  
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);     

      if (i >= ARRAY_SIZE(dev_self)) {
            IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
                     __FUNCTION__);
            return -ENOMEM;
      }
      
      /* Set FIR FIFO and DMA Threshold */
      if ((ali_ircc_setup(info)) == -1)
            return -1;
            
      dev = alloc_irdadev(sizeof(*self));
      if (dev == NULL) {
            IRDA_ERROR("%s(), can't allocate memory for control block!\n",
                     __FUNCTION__);
            return -ENOMEM;
      }

      self = dev->priv;
      self->netdev = dev;
      spin_lock_init(&self->lock);
   
      /* Need to store self somewhere */
      dev_self[i] = self;
      self->index = i;

      /* Initialize IO */
      self->io.cfg_base  = info->cfg_base;      /* In ali_ircc_probe_53 assign            */
      self->io.fir_base  = info->fir_base;      /* info->sir_base = info->fir_base  */
      self->io.sir_base  = info->sir_base;      /* ALi SIR and FIR use the same address */
        self->io.irq       = info->irq;
        self->io.fir_ext   = CHIP_IO_EXTENT;
        self->io.dma       = info->dma;
        self->io.fifo_size = 16;          /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
      
      /* Reserve the ioports that we need */
      if (!request_region(self->io.fir_base, self->io.fir_ext,
                      ALI_IRCC_DRIVER_NAME)) {
            IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
                  self->io.fir_base);
            err = -ENODEV;
            goto err_out1;
      }

      /* Initialize QoS for this device */
      irda_init_max_qos_capabilies(&self->qos);
      
      /* The only value we must override it the baudrate */
      self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
            IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
                  
      self->qos.min_turn_time.bits = qos_mtt_bits;
                  
      irda_qos_bits_to_value(&self->qos);
      
      /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
      self->rx_buff.truesize = 14384; 
      self->tx_buff.truesize = 14384;

      /* Allocate memory if needed */
      self->rx_buff.head =
            dma_alloc_coherent(NULL, self->rx_buff.truesize,
                           &self->rx_buff_dma, GFP_KERNEL);
      if (self->rx_buff.head == NULL) {
            err = -ENOMEM;
            goto err_out2;
      }
      memset(self->rx_buff.head, 0, self->rx_buff.truesize);
      
      self->tx_buff.head =
            dma_alloc_coherent(NULL, self->tx_buff.truesize,
                           &self->tx_buff_dma, GFP_KERNEL);
      if (self->tx_buff.head == NULL) {
            err = -ENOMEM;
            goto err_out3;
      }
      memset(self->tx_buff.head, 0, self->tx_buff.truesize);

      self->rx_buff.in_frame = FALSE;
      self->rx_buff.state = OUTSIDE_FRAME;
      self->tx_buff.data = self->tx_buff.head;
      self->rx_buff.data = self->rx_buff.head;
      
      /* Reset Tx queue info */
      self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
      self->tx_fifo.tail = self->tx_buff.head;

      /* Override the network functions we need to use */
      dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
      dev->open            = ali_ircc_net_open;
      dev->stop            = ali_ircc_net_close;
      dev->do_ioctl        = ali_ircc_net_ioctl;
      dev->get_stats         = ali_ircc_net_get_stats;

      err = register_netdev(dev);
      if (err) {
            IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
            goto err_out4;
      }
      IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);

      /* Check dongle id */
      dongle_id = ali_ircc_read_dongle_id(i, info);
      IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__,
                 ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
            
      self->io.dongle_id = dongle_id;

      IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
      
      return 0;

 err_out4:
      dma_free_coherent(NULL, self->tx_buff.truesize,
                    self->tx_buff.head, self->tx_buff_dma);
 err_out3:
      dma_free_coherent(NULL, self->rx_buff.truesize,
                    self->rx_buff.head, self->rx_buff_dma);
 err_out2:
      release_region(self->io.fir_base, self->io.fir_ext);
 err_out1:
      dev_self[i] = NULL;
      free_netdev(dev);
      return err;
}


/*
 * Function ali_ircc_close (self)
 *
 *    Close driver instance
 *
 */
static int __exit ali_ircc_close(struct ali_ircc_cb *self)
{
      int iobase;

      IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);

      IRDA_ASSERT(self != NULL, return -1;);

        iobase = self->io.fir_base;

      /* Remove netdevice */
      unregister_netdev(self->netdev);

      /* Release the PORT that this driver is using */
      IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
      release_region(self->io.fir_base, self->io.fir_ext);

      if (self->tx_buff.head)
            dma_free_coherent(NULL, self->tx_buff.truesize,
                          self->tx_buff.head, self->tx_buff_dma);
      
      if (self->rx_buff.head)
            dma_free_coherent(NULL, self->rx_buff.truesize,
                          self->rx_buff.head, self->rx_buff_dma);

      dev_self[self->index] = NULL;
      free_netdev(self->netdev);
      
      IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
      
      return 0;
}

/*
 * Function ali_ircc_init_43 (chip, info)
 *
 *    Initialize the ALi M1543 chip. 
 */
static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info) 
{
      /* All controller information like I/O address, DMA channel, IRQ
       * are set by BIOS
       */
      
      return 0;
}

/*
 * Function ali_ircc_init_53 (chip, info)
 *
 *    Initialize the ALi M1535 chip. 
 */
static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info) 
{
      /* All controller information like I/O address, DMA channel, IRQ
       * are set by BIOS
       */
      
      return 0;
}

/*
 * Function ali_ircc_probe_53 (chip, info)
 *          
 *    Probes for the ALi M1535D or M1535
 */
static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
{
      int cfg_base = info->cfg_base;
      int hi, low, reg;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
      
      /* Enter Configuration */
      outb(chip->entr1, cfg_base);
      outb(chip->entr2, cfg_base);
      
      /* Select Logical Device 5 Registers (UART2) */
      outb(0x07, cfg_base);
      outb(0x05, cfg_base+1);
      
      /* Read address control register */
      outb(0x60, cfg_base);
      hi = inb(cfg_base+1);   
      outb(0x61, cfg_base);
      low = inb(cfg_base+1);
      info->fir_base = (hi<<8) + low;
      
      info->sir_base = info->fir_base;
      
      IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
            
      /* Read IRQ control register */
      outb(0x70, cfg_base);
      reg = inb(cfg_base+1);
      info->irq = reg & 0x0f;
      IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
      
      /* Read DMA channel */
      outb(0x74, cfg_base);
      reg = inb(cfg_base+1);
      info->dma = reg & 0x07;
      
      if(info->dma == 0x04)
            IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
      else
            IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
      
      /* Read Enabled Status */
      outb(0x30, cfg_base);
      reg = inb(cfg_base+1);
      info->enabled = (reg & 0x80) && (reg & 0x01);
      IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
      
      /* Read Power Status */
      outb(0x22, cfg_base);
      reg = inb(cfg_base+1);
      info->suspended = (reg & 0x20);
      IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
      
      /* Exit configuration */
      outb(0xbb, cfg_base);
            
      IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);     
      
      return 0;   
}

/*
 * Function ali_ircc_setup (info)
 *
 *          Set FIR FIFO and DMA Threshold
 *    Returns non-negative on success.
 *
 */
static int ali_ircc_setup(chipio_t *info)
{
      unsigned char tmp;
      int version;
      int iobase = info->fir_base;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
      
      /* Locking comments :
       * Most operations here need to be protected. We are called before
       * the device instance is created in ali_ircc_open(), therefore 
       * nobody can bother us - Jean II */

      /* Switch to FIR space */
      SIR2FIR(iobase);
      
      /* Master Reset */
      outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
      
      /* Read FIR ID Version Register */
      switch_bank(iobase, BANK3);
      version = inb(iobase+FIR_ID_VR);
      
      /* Should be 0x00 in the M1535/M1535D */
      if(version != 0x00)
      {
            IRDA_ERROR("%s, Wrong chip version %02x\n",
                     ALI_IRCC_DRIVER_NAME, version);
            return -1;
      }
      
      /* Set FIR FIFO Threshold Register */
      switch_bank(iobase, BANK1);
      outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
      
      /* Set FIR DMA Threshold Register */
      outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
      
      /* CRC enable */
      switch_bank(iobase, BANK2);
      outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
      
      /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
      
      /* Switch to Bank 0 */
      switch_bank(iobase, BANK0);
      
      tmp = inb(iobase+FIR_LCR_B);
      tmp &=~0x20; // disable SIP
      tmp |= 0x80; // these two steps make RX mode
      tmp &= 0xbf;      
      outb(tmp, iobase+FIR_LCR_B);
            
      /* Disable Interrupt */
      outb(0x00, iobase+FIR_IER);
      
      
      /* Switch to SIR space */
      FIR2SIR(iobase);
      
      IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
                 ALI_IRCC_DRIVER_NAME);
      
      /* Enable receive interrupts */ 
      // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
      // Turn on the interrupts in ali_ircc_net_open
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);    
      
      return 0;
}

/*
 * Function ali_ircc_read_dongle_id (int index, info)
 *
 * Try to read dongle indentification. This procedure needs to be executed
 * once after power-on/reset. It also needs to be used whenever you suspect
 * that the user may have plugged/unplugged the IrDA Dongle.
 */
static int ali_ircc_read_dongle_id (int i, chipio_t *info)
{
      int dongle_id, reg;
      int cfg_base = info->cfg_base;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
            
      /* Enter Configuration */
      outb(chips[i].entr1, cfg_base);
      outb(chips[i].entr2, cfg_base);
      
      /* Select Logical Device 5 Registers (UART2) */
      outb(0x07, cfg_base);
      outb(0x05, cfg_base+1);
      
      /* Read Dongle ID */
      outb(0xf0, cfg_base);
      reg = inb(cfg_base+1);  
      dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
      IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__, 
            dongle_id, dongle_types[dongle_id]);
      
      /* Exit configuration */
      outb(0xbb, cfg_base);
                  
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);    
      
      return dongle_id;
}

/*
 * Function ali_ircc_interrupt (irq, dev_id, regs)
 *
 *    An interrupt from the chip has arrived. Time to do some work
 *
 */
static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
{
      struct net_device *dev = dev_id;
      struct ali_ircc_cb *self;
      int ret;
            
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
            
      self = dev->priv;
      
      spin_lock(&self->lock);
      
      /* Dispatch interrupt handler for the current speed */
      if (self->io.speed > 115200)
            ret = ali_ircc_fir_interrupt(self);
      else
            ret = ali_ircc_sir_interrupt(self);
            
      spin_unlock(&self->lock);
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
      return ret;
}
/*
 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
 *
 *    Handle MIR/FIR interrupt
 *
 */
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
{
      __u8 eir, OldMessageCount;
      int iobase, tmp;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
      
      iobase = self->io.fir_base;
      
      switch_bank(iobase, BANK0);   
      self->InterruptID = inb(iobase+FIR_IIR);        
      self->BusStatus = inb(iobase+FIR_BSR);    
      
      OldMessageCount = (self->LineStatus + 1) & 0x07;
      self->LineStatus = inb(iobase+FIR_LSR);   
      //self->ier = inb(iobase+FIR_IER);        2000/12/1 04:32PM
      eir = self->InterruptID & self->ier; /* Mask out the interesting ones */ 
      
      IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
      IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
      IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
      IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
      
      /* Disable interrupts */
       SetCOMInterrupts(self, FALSE);
      
      /* Tx or Rx Interrupt */
      
      if (eir & IIR_EOM) 
      {           
            if (self->io.direction == IO_XMIT) /* TX */
            {
                  IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
                  
                  if(ali_ircc_dma_xmit_complete(self))
                  {
                        if (irda_device_txqueue_empty(self->netdev)) 
                        {
                              /* Prepare for receive */
                              ali_ircc_dma_receive(self);                           
                              self->ier = IER_EOM;                                                    
                        }
                  }
                  else
                  {
                        self->ier = IER_EOM;                            
                  }
                                                      
            }     
            else /* RX */
            {
                  IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
                  
                  if(OldMessageCount > ((self->LineStatus+1) & 0x07))
                  {
                        self->rcvFramesOverflow = TRUE;     
                        IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
                  }
                                    
                  if (ali_ircc_dma_receive_complete(self))
                  {
                        IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
                        
                        self->ier = IER_EOM;                      
                  }
                  else
                  {
                        IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
                        
                        self->ier = IER_EOM | IER_TIMER;                                              
                  }     
            
            }           
      }
      /* Timer Interrupt */
      else if (eir & IIR_TIMER)
      {     
            if(OldMessageCount > ((self->LineStatus+1) & 0x07))
            {
                  self->rcvFramesOverflow = TRUE;     
                  IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
            }
            /* Disable Timer */
            switch_bank(iobase, BANK1);
            tmp = inb(iobase+FIR_CR);
            outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
            
            /* Check if this is a Tx timer interrupt */
            if (self->io.direction == IO_XMIT)
            {
                  ali_ircc_dma_xmit(self);
                  
                  /* Interrupt on EOM */
                  self->ier = IER_EOM;
                                                      
            }
            else /* Rx */
            {
                  if(ali_ircc_dma_receive_complete(self)) 
                  {
                        self->ier = IER_EOM;
                  }
                  else
                  {
                        self->ier = IER_EOM | IER_TIMER;
                  }     
            }           
      }
      
      /* Restore Interrupt */ 
      SetCOMInterrupts(self, TRUE); 
            
      IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
      return IRQ_RETVAL(eir);
}

/*
 * Function ali_ircc_sir_interrupt (irq, self, eir)
 *
 *    Handle SIR interrupt
 *
 */
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
{
      int iobase;
      int iir, lsr;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
      
      iobase = self->io.sir_base;

      iir = inb(iobase+UART_IIR) & UART_IIR_ID;
      if (iir) {  
            /* Clear interrupt */
            lsr = inb(iobase+UART_LSR);

            IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__, 
                     iir, lsr, iobase);

            switch (iir) 
            {
                  case UART_IIR_RLSI:
                        IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
                        break;
                  case UART_IIR_RDI:
                        /* Receive interrupt */
                        ali_ircc_sir_receive(self);
                        break;
                  case UART_IIR_THRI:
                        if (lsr & UART_LSR_THRE)
                        {
                              /* Transmitter ready for data */
                              ali_ircc_sir_write_wakeup(self);                      
                        }                       
                        break;
                  default:
                        IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
                        break;
            } 
            
      }
      
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);    

      return IRQ_RETVAL(iir);
}


/*
 * Function ali_ircc_sir_receive (self)
 *
 *    Receive one frame from the infrared port
 *
 */
static void ali_ircc_sir_receive(struct ali_ircc_cb *self) 
{
      int boguscount = 0;
      int iobase;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
      IRDA_ASSERT(self != NULL, return;);

      iobase = self->io.sir_base;

      /*  
       * Receive all characters in Rx FIFO, unwrap and unstuff them. 
         * async_unwrap_char will deliver all found frames  
       */
      do {
            async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, 
                          inb(iobase+UART_RX));

            /* Make sure we don't stay here too long */
            if (boguscount++ > 32) {
                  IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
                  break;
            }
      } while (inb(iobase+UART_LSR) & UART_LSR_DR);   
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

/*
 * Function ali_ircc_sir_write_wakeup (tty)
 *
 *    Called by the driver when there's room for more data.  If we have
 *    more packets to send, we send them here.
 *
 */
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
{
      int actual = 0;
      int iobase; 

      IRDA_ASSERT(self != NULL, return;);

      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      iobase = self->io.sir_base;

      /* Finished with frame?  */
      if (self->tx_buff.len > 0)  
      {
            /* Write data left in transmit buffer */
            actual = ali_ircc_sir_write(iobase, self->io.fifo_size, 
                              self->tx_buff.data, self->tx_buff.len);
            self->tx_buff.data += actual;
            self->tx_buff.len  -= actual;
      } 
      else 
      {
            if (self->new_speed) 
            {
                  /* We must wait until all data are gone */
                  while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
                        IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
                  
                  IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
                  ali_ircc_change_speed(self, self->new_speed);
                  self->new_speed = 0;                
                  
                  // benjamin 2000/11/10 06:32PM
                  if (self->io.speed > 115200)
                  {
                        IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );                    
                              
                        self->ier = IER_EOM;
                        // SetCOMInterrupts(self, TRUE);                                        
                        return;                                         
                  }
            }
            else
            {
                  netif_wake_queue(self->netdev);     
            }
                  
            self->stats.tx_packets++;
            
            /* Turn on receive interrupts */
            outb(UART_IER_RDI, iobase+UART_IER);
      }
            
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
{
      struct net_device *dev = self->netdev;
      int iobase;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
      
      /* This function *must* be called with irq off and spin-lock.
       * - Jean II */

      iobase = self->io.fir_base;
      
      SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
      
      /* Go to MIR, FIR Speed */
      if (baud > 115200)
      {
            
                              
            ali_ircc_fir_change_speed(self, baud);                
            
            /* Install FIR xmit handler*/
            dev->hard_start_xmit = ali_ircc_fir_hard_xmit;        
                        
            /* Enable Interuupt */
            self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM                           
                        
            /* Be ready for incomming frames */
            ali_ircc_dma_receive(self);   // benajmin 2000/11/8 07:46PM not complete
      }     
      /* Go to SIR Speed */
      else
      {
            ali_ircc_sir_change_speed(self, baud);
                        
            /* Install SIR xmit handler*/
            dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
      }
      
            
      SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
            
      netif_wake_queue(self->netdev);     
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
{
            
      int iobase; 
      struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
      struct net_device *dev;

      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
            
      IRDA_ASSERT(self != NULL, return;);

      dev = self->netdev;
      iobase = self->io.fir_base;
      
      IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
      
      /* Come from SIR speed */
      if(self->io.speed <=115200)
      {
            SIR2FIR(iobase);
      }
            
      /* Update accounting for new speed */
      self->io.speed = baud;
            
      // Set Dongle Speed mode
      ali_ircc_change_dongle_speed(self, baud);
            
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

/*
 * Function ali_sir_change_speed (self, speed)
 *
 *    Set speed of IrDA port to specified baudrate
 *
 */
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
{
      struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
      unsigned long flags;
      int iobase; 
      int fcr;    /* FIFO control reg */
      int lcr;    /* Line control reg */
      int divisor;

      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);

      IRDA_ASSERT(self != NULL, return;);

      iobase = self->io.sir_base;
      
      /* Come from MIR or FIR speed */
      if(self->io.speed >115200)
      {     
            // Set Dongle Speed mode first
            ali_ircc_change_dongle_speed(self, speed);
                  
            FIR2SIR(iobase);
      }
            
      // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
            
      inb(iobase+UART_LSR);
      inb(iobase+UART_SCR);
            
      /* Update accounting for new speed */
      self->io.speed = speed;

      spin_lock_irqsave(&self->lock, flags);

      divisor = 115200/speed;
      
      fcr = UART_FCR_ENABLE_FIFO;

      /* 
       * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
       * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
       * about this timeout since it will always be fast enough. 
       */
      if (self->io.speed < 38400)
            fcr |= UART_FCR_TRIGGER_1;
      else 
            fcr |= UART_FCR_TRIGGER_14;
        
      /* IrDA ports use 8N1 */
      lcr = UART_LCR_WLEN8;
      
      outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
      outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
      outb(divisor >> 8,        iobase+UART_DLM);
      outb(lcr,           iobase+UART_LCR); /* Set 8N1      */
      outb(fcr,           iobase+UART_FCR); /* Enable FIFO's */

      /* without this, the conection will be broken after come back from FIR speed,
         but with this, the SIR connection is harder to established */
      outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
      
      spin_unlock_irqrestore(&self->lock, flags);
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
{
      
      struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
      int iobase,dongle_id;
      int tmp = 0;
                  
      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );    
      
      iobase = self->io.fir_base;   /* or iobase = self->io.sir_base; */
      dongle_id = self->io.dongle_id;
      
      /* We are already locked, no need to do it again */
            
      IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);            
      
      switch_bank(iobase, BANK2);
      tmp = inb(iobase+FIR_IRDA_CR);
            
      /* IBM type dongle */
      if(dongle_id == 0)
      {                       
            if(speed == 4000000)
            {
                  //          __ __ 
                  // SD/MODE __|     |__ __
                  //               __ __ 
                  // IRTX    __ __|     |__
                  //         T1 T2 T3 T4 T5
                  
                  tmp &=  ~IRDA_CR_HDLC;        // HDLC=0
                  tmp |= IRDA_CR_CRC;           // CRC=1
                  
                  switch_bank(iobase, BANK2);
                  outb(tmp, iobase+FIR_IRDA_CR);
                  
                        // T1 -> SD/MODE:0 IRTX:0
                        tmp &= ~0x09;
                        tmp |= 0x02;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // T2 -> SD/MODE:1 IRTX:0
                        tmp &= ~0x01;
                        tmp |= 0x0a;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // T3 -> SD/MODE:1 IRTX:1
                        tmp |= 0x0b;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // T4 -> SD/MODE:0 IRTX:1
                        tmp &= ~0x08;
                        tmp |= 0x03;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // T5 -> SD/MODE:0 IRTX:0
                        tmp &= ~0x09;
                        tmp |= 0x02;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // reset -> Normal TX output Signal
                        outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                      
            }
            else /* speed <=1152000 */
            {     
                  //          __    
                  // SD/MODE __|  |__
                  //
                  // IRTX    ________
                  //         T1 T2 T3  
                  
                  /* MIR 115200, 57600 */
                  if (speed==1152000)
                  {
                        tmp |= 0xA0;         //HDLC=1, 1.152Mbps=1
                        }
                        else
                        {
                        tmp &=~0x80;         //HDLC 0.576Mbps
                        tmp |= 0x20;         //HDLC=1,
                        }                 
                        
                        tmp |= IRDA_CR_CRC;           // CRC=1
                        
                        switch_bank(iobase, BANK2);
                        outb(tmp, iobase+FIR_IRDA_CR);
                                    
                  /* MIR 115200, 57600 */ 
                                    
                  //switch_bank(iobase, BANK2);             
                  // T1 -> SD/MODE:0 IRTX:0
                        tmp &= ~0x09;
                        tmp |= 0x02;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // T2 -> SD/MODE:1 IRTX:0
                        tmp &= ~0x01;     
                        tmp |= 0x0a;      
                        outb(tmp, iobase+FIR_IRDA_CR);
                        
                        // T3 -> SD/MODE:0 IRTX:0
                        tmp &= ~0x09;
                        tmp |= 0x02;
                        outb(tmp, iobase+FIR_IRDA_CR);
                        udelay(2);
                        
                        // reset -> Normal TX output Signal
                        outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                                        
            }           
      }
      else if (dongle_id == 1) /* HP HDSL-3600 */
      {
            switch(speed)
            {
            case 4000000:
                  tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
                  break;      
                  
            case 1152000:
                  tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
                        break;
                        
                  case 576000:
                        tmp &=~0x80;            // HDLC 0.576Mbps
                  tmp |= 0x20;            // HDLC=1,
                  break;
                  }                 
                  
            tmp |= IRDA_CR_CRC;           // CRC=1
                  
            switch_bank(iobase, BANK2);
                  outb(tmp, iobase+FIR_IRDA_CR);            
      }
      else /* HP HDSL-1100 */
      {
            if(speed <= 115200) /* SIR */
            {
                  
                  tmp &= ~IRDA_CR_FIR_SIN;      // HP sin select = 0
                  
                  switch_bank(iobase, BANK2);
                        outb(tmp, iobase+FIR_IRDA_CR);                  
            }
            else /* MIR FIR */
            {     
                  
                  switch(speed)
                  {
                  case 4000000:
                        tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
                        break;      
                  
                  case 1152000:
                        tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
                              break;
                        
                        case 576000:
                              tmp &=~0x80;            // HDLC 0.576Mbps
                        tmp |= 0x20;            // HDLC=1,
                        break;
                        }                 
                  
                  tmp |= IRDA_CR_CRC;           // CRC=1
                  tmp |= IRDA_CR_FIR_SIN;       // HP sin select = 1
                  
                  switch_bank(iobase, BANK2);
                        outb(tmp, iobase+FIR_IRDA_CR);                  
            }
      }
                  
      switch_bank(iobase, BANK0);
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );         
}

/*
 * Function ali_ircc_sir_write (driver)
 *
 *    Fill Tx FIFO with transmit data
 *
 */
static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
{
      int actual = 0;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
            
      /* Tx FIFO should be empty! */
      if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
            IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
            return 0;
      }
        
      /* Fill FIFO with current frame */
      while ((fifo_size-- > 0) && (actual < len)) {
            /* Transmit next byte */
            outb(buf[actual], iobase+UART_TX);

            actual++;
      }
      
        IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ ); 
      return actual;
}

/*
 * Function ali_ircc_net_open (dev)
 *
 *    Start the device
 *
 */
static int ali_ircc_net_open(struct net_device *dev)
{
      struct ali_ircc_cb *self;
      int iobase;
      char hwname[32];
            
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      IRDA_ASSERT(dev != NULL, return -1;);
      
      self = (struct ali_ircc_cb *) dev->priv;
      
      IRDA_ASSERT(self != NULL, return 0;);
      
      iobase = self->io.fir_base;
      
      /* Request IRQ and install Interrupt Handler */
      if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev)) 
      {
            IRDA_WARNING("%s, unable to allocate irq=%d\n",
                       ALI_IRCC_DRIVER_NAME,
                       self->io.irq);
            return -EAGAIN;
      }
      
      /*
       * Always allocate the DMA channel after the IRQ, and clean up on 
       * failure.
       */
      if (request_dma(self->io.dma, dev->name)) {
            IRDA_WARNING("%s, unable to allocate dma=%d\n",
                       ALI_IRCC_DRIVER_NAME,
                       self->io.dma);
            free_irq(self->io.irq, self);
            return -EAGAIN;
      }
      
      /* Turn on interrups */
      outb(UART_IER_RDI , iobase+UART_IER);

      /* Ready to play! */
      netif_start_queue(dev); //benjamin by irport
      
      /* Give self a hardware name */
      sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);

      /* 
       * Open new IrLAP layer instance, now that everything should be
       * initialized properly 
       */
      self->irlap = irlap_open(dev, &self->qos, hwname);
            
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      
      return 0;
}

/*
 * Function ali_ircc_net_close (dev)
 *
 *    Stop the device
 *
 */
static int ali_ircc_net_close(struct net_device *dev)
{     

      struct ali_ircc_cb *self;
      //int iobase;
                  
      IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
            
      IRDA_ASSERT(dev != NULL, return -1;);

      self = (struct ali_ircc_cb *) dev->priv;
      IRDA_ASSERT(self != NULL, return 0;);

      /* Stop device */
      netif_stop_queue(dev);
      
      /* Stop and remove instance of IrLAP */
      if (self->irlap)
            irlap_close(self->irlap);
      self->irlap = NULL;
            
      disable_dma(self->io.dma);

      /* Disable interrupts */
      SetCOMInterrupts(self, FALSE);
             
      free_irq(self->io.irq, dev);
      free_dma(self->io.dma);

      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      
      return 0;
}

/*
 * Function ali_ircc_fir_hard_xmit (skb, dev)
 *
 *    Transmit the frame
 *
 */
static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
      struct ali_ircc_cb *self;
      unsigned long flags;
      int iobase;
      __u32 speed;
      int mtt, diff;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );   
      
      self = (struct ali_ircc_cb *) dev->priv;
      iobase = self->io.fir_base;

      netif_stop_queue(dev);
      
      /* Make sure tests *& speed change are atomic */
      spin_lock_irqsave(&self->lock, flags);
      
      /* Note : you should make sure that speed changes are not going
       * to corrupt any outgoing frame. Look at nsc-ircc for the gory
       * details - Jean II */

      /* Check if we need to change the speed */
      speed = irda_get_next_speed(skb);
      if ((speed != self->io.speed) && (speed != -1)) {
            /* Check for empty frame */
            if (!skb->len) {
                  ali_ircc_change_speed(self, speed); 
                  dev->trans_start = jiffies;
                  spin_unlock_irqrestore(&self->lock, flags);
                  dev_kfree_skb(skb);
                  return 0;
            } else
                  self->new_speed = speed;
      }

      /* Register and copy this frame to DMA memory */
      self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
      self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
      self->tx_fifo.tail += skb->len;

      self->stats.tx_bytes += skb->len;

      skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
                  skb->len);
      self->tx_fifo.len++;
      self->tx_fifo.free++;

      /* Start transmit only if there is currently no transmit going on */
      if (self->tx_fifo.len == 1) 
      {
            /* Check if we must wait the min turn time or not */
            mtt = irda_get_mtt(skb);
                        
            if (mtt) 
            {
                  /* Check how much time we have used already */
                  do_gettimeofday(&self->now);
                  
                  diff = self->now.tv_usec - self->stamp.tv_usec;
                  /* self->stamp is set from ali_ircc_dma_receive_complete() */
                                          
                  IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);     
                  
                  if (diff < 0) 
                        diff += 1000000;
                  
                  /* Check if the mtt is larger than the time we have
                   * already used by all the protocol processing
                   */
                  if (mtt > diff)
                  {                       
                        mtt -= diff;
                                                
                        /* 
                         * Use timer if delay larger than 1000 us, and
                         * use udelay for smaller values which should
                         * be acceptable
                         */
                        if (mtt > 500) 
                        {
                              /* Adjust for timer resolution */
                              mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
                              
                              IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);   
                              
                              /* Setup timer */
                              if (mtt == 1) /* 500 us */
                              {
                                    switch_bank(iobase, BANK1);
                                    outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
                              }     
                              else if (mtt == 2) /* 1 ms */
                              {
                                    switch_bank(iobase, BANK1);
                                    outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
                              }                             
                              else /* > 2ms -> 4ms */
                              {
                                    switch_bank(iobase, BANK1);
                                    outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
                              }
                              
                              
                              /* Start timer */
                              outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
                              self->io.direction = IO_XMIT;
                              
                              /* Enable timer interrupt */
                              self->ier = IER_TIMER;
                              SetCOMInterrupts(self, TRUE);                         
                              
                              /* Timer will take care of the rest */
                              goto out; 
                        } 
                        else
                              udelay(mtt);
                  } // if (if (mtt > diff)
            }// if (mtt) 
                        
            /* Enable EOM interrupt */
            self->ier = IER_EOM;
            SetCOMInterrupts(self, TRUE);
            
            /* Transmit frame */
            ali_ircc_dma_xmit(self);
      } // if (self->tx_fifo.len == 1) 
      
 out:
      
      /* Not busy transmitting anymore if window is not full */
      if (self->tx_fifo.free < MAX_TX_WINDOW)
            netif_wake_queue(self->netdev);
      
      /* Restore bank register */
      switch_bank(iobase, BANK0);

      dev->trans_start = jiffies;
      spin_unlock_irqrestore(&self->lock, flags);
      dev_kfree_skb(skb);

      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      return 0;   
}


static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
{
      int iobase, tmp;
      unsigned char FIFO_OPTI, Hi, Lo;
      
      
      IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );   
      
      iobase = self->io.fir_base;
      
      /* FIFO threshold , this method comes from NDIS5 code */
      
      if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
            FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
      else
            FIFO_OPTI = TX_FIFO_Threshold;
      
      /* Disable DMA */
      switch_bank(iobase, BANK1);
      outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
      
      self->io.direction = IO_XMIT;
      
      irda_setup_dma(self->io.dma, 
                   ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
                  self->tx_buff.head) + self->tx_buff_dma,
                   self->tx_fifo.queue[self->tx_fifo.ptr].len, 
                   DMA_TX_MODE);
            
      /* Reset Tx FIFO */
      switch_bank(iobase, BANK0);
      outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
      
      /* Set Tx FIFO threshold */
      if (self->fifo_opti_buf!=FIFO_OPTI) 
      {
            switch_bank(iobase, BANK1);
            outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
            self->fifo_opti_buf=FIFO_OPTI;
      }
      
      /* Set Tx DMA threshold */
      switch_bank(iobase, BANK1);
      outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
      
      /* Set max Tx frame size */
      Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
      Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
      switch_bank(iobase, BANK2);
      outb(Hi, iobase+FIR_TX_DSR_HI);
      outb(Lo, iobase+FIR_TX_DSR_LO);
      
      /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
      switch_bank(iobase, BANK0);   
      tmp = inb(iobase+FIR_LCR_B);
      tmp &= ~0x20; // Disable SIP
      outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
      IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
      
      outb(0, iobase+FIR_LSR);
                  
      /* Enable DMA and Burst Mode */
      switch_bank(iobase, BANK1);
      outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
      
      switch_bank(iobase, BANK0); 
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
}

static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
{
      int iobase;
      int ret = TRUE;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );   
      
      iobase = self->io.fir_base;
      
      /* Disable DMA */
      switch_bank(iobase, BANK1);
      outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
      
      /* Check for underrun! */
      switch_bank(iobase, BANK0);
      if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
      
      {
            IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);      
            self->stats.tx_errors++;
            self->stats.tx_fifo_errors++;       
      }
      else 
      {
            self->stats.tx_packets++;
      }

      /* Check if we need to change the speed */
      if (self->new_speed) 
      {
            ali_ircc_change_speed(self, self->new_speed);
            self->new_speed = 0;
      }

      /* Finished with this frame, so prepare for next */
      self->tx_fifo.ptr++;
      self->tx_fifo.len--;

      /* Any frames to be sent back-to-back? */
      if (self->tx_fifo.len) 
      {
            ali_ircc_dma_xmit(self);
            
            /* Not finished yet! */
            ret = FALSE;
      } 
      else 
      {     /* Reset Tx FIFO info */
            self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
            self->tx_fifo.tail = self->tx_buff.head;
      }

      /* Make sure we have room for more frames */
      if (self->tx_fifo.free < MAX_TX_WINDOW) {
            /* Not busy transmitting anymore */
            /* Tell the network layer, that we can accept more frames */
            netif_wake_queue(self->netdev);
      }
            
      switch_bank(iobase, BANK0); 
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      return ret;
}

/*
 * Function ali_ircc_dma_receive (self)
 *
 *    Get ready for receiving a frame. The device will initiate a DMA
 *    if it starts to receive a frame.
 *
 */
static int ali_ircc_dma_receive(struct ali_ircc_cb *self) 
{
      int iobase, tmp;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );   
      
      iobase = self->io.fir_base;
      
      /* Reset Tx FIFO info */
      self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
      self->tx_fifo.tail = self->tx_buff.head;
            
      /* Disable DMA */
      switch_bank(iobase, BANK1);
      outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
      
      /* Reset Message Count */
      switch_bank(iobase, BANK0);
      outb(0x07, iobase+FIR_LSR);
            
      self->rcvFramesOverflow = FALSE;    
      
      self->LineStatus = inb(iobase+FIR_LSR) ;
      
      /* Reset Rx FIFO info */
      self->io.direction = IO_RECV;
      self->rx_buff.data = self->rx_buff.head;
            
      /* Reset Rx FIFO */
      // switch_bank(iobase, BANK0);
      outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A); 
      
      self->st_fifo.len = self->st_fifo.pending_bytes = 0;
      self->st_fifo.tail = self->st_fifo.head = 0;
            
      irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
                   DMA_RX_MODE);
       
      /* Set Receive Mode,Brick Wall */
      //switch_bank(iobase, BANK0);
      tmp = inb(iobase+FIR_LCR_B);
      outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
      IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
                  
      /* Set Rx Threshold */
      switch_bank(iobase, BANK1);
      outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
      outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
            
      /* Enable DMA and Burst Mode */
      // switch_bank(iobase, BANK1);
      outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
                        
      switch_bank(iobase, BANK0); 
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      return 0;
}

static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
{
      struct st_fifo *st_fifo;
      struct sk_buff *skb;
      __u8 status, MessageCount;
      int len, i, iobase, val;      

      IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );   

      st_fifo = &self->st_fifo;           
      iobase = self->io.fir_base;   
            
      switch_bank(iobase, BANK0);
      MessageCount = inb(iobase+ FIR_LSR)&0x07;
      
      if (MessageCount > 0)   
            IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);   
            
      for (i=0; i<=MessageCount; i++)
      {
            /* Bank 0 */
            switch_bank(iobase, BANK0);
            status = inb(iobase+FIR_LSR);
            
            switch_bank(iobase, BANK2);
            len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
            len = len << 8; 
            len |= inb(iobase+FIR_RX_DSR_LO);
            
            IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len); 
            IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
            
            if (st_fifo->tail >= MAX_RX_WINDOW) {
                  IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
                  continue;
            }
                  
            st_fifo->entries[st_fifo->tail].status = status;
            st_fifo->entries[st_fifo->tail].len = len;
            st_fifo->pending_bytes += len;
            st_fifo->tail++;
            st_fifo->len++;
      }
                  
      for (i=0; i<=MessageCount; i++)
      {     
            /* Get first entry */
            status = st_fifo->entries[st_fifo->head].status;
            len    = st_fifo->entries[st_fifo->head].len;
            st_fifo->pending_bytes -= len;
            st_fifo->head++;
            st_fifo->len--;               
            
            /* Check for errors */
            if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))             
            {
                  IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ ); 
                  
                  /* Skip frame */
                  self->stats.rx_errors++;
                  
                  self->rx_buff.data += len;
                  
                  if (status & LSR_FIFO_UR) 
                  {
                        self->stats.rx_frame_errors++;
                        IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
                  }     
                  if (status & LSR_FRAME_ERROR)
                  {
                        self->stats.rx_frame_errors++;
                        IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
                  }
                                          
                  if (status & LSR_CRC_ERROR) 
                  {
                        self->stats.rx_crc_errors++;
                        IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
                  }
                  
                  if(self->rcvFramesOverflow)
                  {
                        self->stats.rx_frame_errors++;
                        IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );                                              
                  }
                  if(len == 0)
                  {
                        self->stats.rx_frame_errors++;
                        IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
                  }
            }      
            else 
            {
                  
                  if (st_fifo->pending_bytes < 32) 
                  {
                        switch_bank(iobase, BANK0);
                        val = inb(iobase+FIR_BSR);    
                        if ((val& BSR_FIFO_NOT_EMPTY)== 0x80) 
                        {
                              IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
                              
                              /* Put this entry back in fifo */
                              st_fifo->head--;
                              st_fifo->len++;
                              st_fifo->pending_bytes += len;
                              st_fifo->entries[st_fifo->head].status = status;
                              st_fifo->entries[st_fifo->head].len = len;
                                    
                              /*  
                              * DMA not finished yet, so try again 
                              * later, set timer value, resolution 
                              * 500 us 
                              */
                               
                              switch_bank(iobase, BANK1);
                              outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
                              
                              /* Enable Timer */
                              outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
                                    
                              return FALSE; /* I'll be back! */
                        }
                  }           
                  
                  /* 
                   * Remember the time we received this frame, so we can
                   * reduce the min turn time a bit since we will know
                   * how much time we have used for protocol processing
                   */
                  do_gettimeofday(&self->stamp);

                  skb = dev_alloc_skb(len+1);
                  if (skb == NULL)  
                  {
                        IRDA_WARNING("%s(), memory squeeze, "
                                   "dropping frame.\n",
                                   __FUNCTION__);
                        self->stats.rx_dropped++;

                        return FALSE;
                  }
                  
                  /* Make sure IP header gets aligned */
                  skb_reserve(skb, 1); 
                  
                  /* Copy frame without CRC, CRC is removed by hardware*/
                  skb_put(skb, len);
                  skb_copy_to_linear_data(skb, self->rx_buff.data, len);

                  /* Move to next frame */
                  self->rx_buff.data += len;
                  self->stats.rx_bytes += len;
                  self->stats.rx_packets++;

                  skb->dev = self->netdev;
                  skb_reset_mac_header(skb);
                  skb->protocol = htons(ETH_P_IRDA);
                  netif_rx(skb);
                  self->netdev->last_rx = jiffies;
            }
      }
      
      switch_bank(iobase, BANK0);   
            
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      return TRUE;
}



/*
 * Function ali_ircc_sir_hard_xmit (skb, dev)
 *
 *    Transmit the frame!
 *
 */
static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
      struct ali_ircc_cb *self;
      unsigned long flags;
      int iobase;
      __u32 speed;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      IRDA_ASSERT(dev != NULL, return 0;);
      
      self = (struct ali_ircc_cb *) dev->priv;
      IRDA_ASSERT(self != NULL, return 0;);

      iobase = self->io.sir_base;

      netif_stop_queue(dev);
      
      /* Make sure tests *& speed change are atomic */
      spin_lock_irqsave(&self->lock, flags);

      /* Note : you should make sure that speed changes are not going
       * to corrupt any outgoing frame. Look at nsc-ircc for the gory
       * details - Jean II */

      /* Check if we need to change the speed */
      speed = irda_get_next_speed(skb);
      if ((speed != self->io.speed) && (speed != -1)) {
            /* Check for empty frame */
            if (!skb->len) {
                  ali_ircc_change_speed(self, speed); 
                  dev->trans_start = jiffies;
                  spin_unlock_irqrestore(&self->lock, flags);
                  dev_kfree_skb(skb);
                  return 0;
            } else
                  self->new_speed = speed;
      }

      /* Init tx buffer */
      self->tx_buff.data = self->tx_buff.head;

        /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
      self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, 
                                 self->tx_buff.truesize);
      
      self->stats.tx_bytes += self->tx_buff.len;

      /* Turn on transmit finished interrupt. Will fire immediately!  */
      outb(UART_IER_THRI, iobase+UART_IER); 

      dev->trans_start = jiffies;
      spin_unlock_irqrestore(&self->lock, flags);

      dev_kfree_skb(skb);
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      
      return 0;   
}


/*
 * Function ali_ircc_net_ioctl (dev, rq, cmd)
 *
 *    Process IOCTL commands for this device
 *
 */
static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
      struct if_irda_req *irq = (struct if_irda_req *) rq;
      struct ali_ircc_cb *self;
      unsigned long flags;
      int ret = 0;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      IRDA_ASSERT(dev != NULL, return -1;);

      self = dev->priv;

      IRDA_ASSERT(self != NULL, return -1;);

      IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
      
      switch (cmd) {
      case SIOCSBANDWIDTH: /* Set bandwidth */
            IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
            /*
             * This function will also be used by IrLAP to change the
             * speed, so we still must allow for speed change within
             * interrupt context.
             */
            if (!in_interrupt() && !capable(CAP_NET_ADMIN))
                  return -EPERM;
            
            spin_lock_irqsave(&self->lock, flags);
            ali_ircc_change_speed(self, irq->ifr_baudrate);       
            spin_unlock_irqrestore(&self->lock, flags);
            break;
      case SIOCSMEDIABUSY: /* Set media busy */
            IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
            if (!capable(CAP_NET_ADMIN))
                  return -EPERM;
            irda_device_set_media_busy(self->netdev, TRUE);
            break;
      case SIOCGRECEIVING: /* Check if we are receiving right now */
            IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
            /* This is protected */
            irq->ifr_receiving = ali_ircc_is_receiving(self);
            break;
      default:
            ret = -EOPNOTSUPP;
      }
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      
      return ret;
}

/*
 * Function ali_ircc_is_receiving (self)
 *
 *    Return TRUE is we are currently receiving a frame
 *
 */
static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
{
      unsigned long flags;
      int status = FALSE;
      int iobase;       
      
      IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
      
      IRDA_ASSERT(self != NULL, return FALSE;);

      spin_lock_irqsave(&self->lock, flags);

      if (self->io.speed > 115200) 
      {
            iobase = self->io.fir_base;
            
            switch_bank(iobase, BANK1);
            if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)             
            {
                  /* We are receiving something */
                  IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
                  status = TRUE;
            }
            switch_bank(iobase, BANK0);         
      } 
      else
      { 
            status = (self->rx_buff.state != OUTSIDE_FRAME);
      }
      
      spin_unlock_irqrestore(&self->lock, flags);
      
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
      
      return status;
}

static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
{
      struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
      
      IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
            
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
      
      return &self->stats;
}

static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
{
      struct ali_ircc_cb *self = platform_get_drvdata(dev);
      
      IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);

      if (self->io.suspended)
            return 0;

      ali_ircc_net_close(self->netdev);

      self->io.suspended = 1;
      
      return 0;
}

static int ali_ircc_resume(struct platform_device *dev)
{
      struct ali_ircc_cb *self = platform_get_drvdata(dev);
      
      if (!self->io.suspended)
            return 0;
      
      ali_ircc_net_open(self->netdev);
      
      IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);

      self->io.suspended = 0;

      return 0;
}

/* ALi Chip Function */

static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
{
      
      unsigned char newMask;
      
      int iobase = self->io.fir_base; /* or sir_base */

      IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);  
      
      /* Enable the interrupt which we wish to */
      if (enable){
            if (self->io.direction == IO_XMIT)
            {
                  if (self->io.speed > 115200) /* FIR, MIR */
                  {
                        newMask = self->ier;
                  }
                  else /* SIR */
                  {
                        newMask = UART_IER_THRI | UART_IER_RDI;
                  }
            }
            else {
                  if (self->io.speed > 115200) /* FIR, MIR */
                  {
                        newMask = self->ier;
                  }
                  else /* SIR */
                  {
                        newMask = UART_IER_RDI;
                  }
            }
      }
      else /* Disable all the interrupts */
      {
            newMask = 0x00;

      }

      //SIR and FIR has different registers
      if (self->io.speed > 115200)
      {     
            switch_bank(iobase, BANK0);
            outb(newMask, iobase+FIR_IER);
      }
      else
            outb(newMask, iobase+UART_IER);
            
      IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

static void SIR2FIR(int iobase)
{
      //unsigned char tmp;
            
      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      /* Already protected (change_speed() or setup()), no need to lock.
       * Jean II */
      
      outb(0x28, iobase+UART_MCR);
      outb(0x68, iobase+UART_MCR);
      outb(0x88, iobase+UART_MCR);        
      
      outb(0x60, iobase+FIR_MCR);   /*  Master Reset */
      outb(0x20, iobase+FIR_MCR);   /*  Master Interrupt Enable */
      
      //tmp = inb(iobase+FIR_LCR_B);      /* SIP enable */
      //tmp |= 0x20;
      //outb(tmp, iobase+FIR_LCR_B);      
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );   
}

static void FIR2SIR(int iobase)
{
      unsigned char val;
      
      IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
      
      /* Already protected (change_speed() or setup()), no need to lock.
       * Jean II */
      
      outb(0x20, iobase+FIR_MCR);   /* IRQ to low */
      outb(0x00, iobase+UART_IER);  
            
      outb(0xA0, iobase+FIR_MCR);   /* Don't set master reset */
      outb(0x00, iobase+UART_FCR);
      outb(0x07, iobase+UART_FCR);        
      
      val = inb(iobase+UART_RX);
      val = inb(iobase+UART_LSR);
      val = inb(iobase+UART_MSR);
      
      IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
}

MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
MODULE_DESCRIPTION("ALi FIR Controller Driver");
MODULE_LICENSE("GPL");


module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "Base I/O addresses");
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ lines");
module_param_array(dma, int, NULL, 0);
MODULE_PARM_DESC(dma, "DMA channels");

module_init(ali_ircc_init);
module_exit(ali_ircc_cleanup);

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