donauboe.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/*****************************************************************
 *
 * Filename:		donauboe.c
 * Version: 		2.17
 * Description:   Driver for the Toshiba OBOE (or type-O or 701)
 *                FIR Chipset, also supports the DONAUOBOE (type-DO
 *                or d01) FIR chipset which as far as I know is
 *                register compatible.
 * Status:        Experimental.
 * Author:        James McKenzie <[e-mail]>
 * Created at:    Sat May 8  12:35:27 1999
 * Modified:      Paul Bristow <[e-mail]>
 * Modified:      Mon Nov 11 19:10:05 1999
 * Modified:      James McKenzie <[e-mail]>
 * Modified:      Thu Mar 16 12:49:00 2000 (Substantial rewrite)
 * Modified:      Sat Apr 29 00:23:03 2000 (Added DONAUOBOE support)
 * Modified:      Wed May 24 23:45:02 2000 (Fixed chipio_t structure)
 * Modified: 2.13 Christian Gennerat <[e-mail]>
 * Modified: 2.13 dim jan 07 21:57:39 2001 (tested with kernel 2.4 & irnet/ppp)
 * Modified: 2.14 Christian Gennerat <[e-mail]>
 * Modified: 2.14 lun fev 05 17:55:59 2001 (adapted to patch-2.4.1-pre8-irda1)
 * Modified: 2.15 Martin Lucina <[e-mail]>
 * Modified: 2.15 Fri Jun 21 20:40:59 2002 (sync with 2.4.18, substantial fixes)
 * Modified: 2.16 Martin Lucina <[e-mail]>
 * Modified: 2.16 Sat Jun 22 18:54:29 2002 (fix freeregion, default to verbose)
 * Modified: 2.17 Christian Gennerat <[e-mail]>
 * Modified: 2.17 jeu sep 12 08:50:20 2002 (save_flags();cli(); replaced by spinlocks)
 *
 *     Copyright (c) 1999 James McKenzie, 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.
 *
 *     Neither James McKenzie nor Cambridge University admit liability nor
 *     provide warranty for any of this software. This material is
 *     provided "AS-IS" and at no charge.
 *
 *     Applicable Models : Libretto 100/110CT and many more.
 *     Toshiba refers to this chip as the type-O IR port,
 *     or the type-DO IR port.
 *
 ********************************************************************/

/* Look at toshoboe.h (currently in include/net/irda) for details of */
/* Where to get documentation on the chip         */


static char *rcsid =
  "$Id: donauboe.c V2.17 jeu sep 12 08:50:20 2002 $";

/* See below for a description of the logic in this driver */

/* Is irda_crc16_table[] exported? not yet */
/* define this if you get errors about multiple defns of irda_crc16_table */
#undef CRC_EXPORTED

/* User servicable parts */
/* Enable the code which probes the chip and does a few tests */
/* Probe code is very useful for understanding how the hardware works */
/* Use it with various combinations of TT_LEN, RX_LEN */
/* Strongly recomended, disable if the probe fails on your machine */
/* and send me <[e-mail]> the output of dmesg */
#define DO_PROBE 1

/* Trace Transmit ring, interrupts, Receive ring or not ? */
#define PROBE_VERBOSE 1

/* Debug option, examine sent and received raw data */
/* Irdadump is better, but does not see all packets. enable it if you want. */
#undef DUMP_PACKETS

/* MIR mode has not been tested. Some behaviour is different */
/* Seems to work against an Ericsson R520 for me. -Martin */
#define USE_MIR

/* Schedule back to back hardware transmits wherever possible, otherwise */
/* we need an interrupt for every frame, unset if oboe works for a bit and */
/* then hangs */
#define OPTIMIZE_TX

/* Set the number of slots in the rings */
/* If you get rx/tx fifo overflows at high bitrates, you can try increasing */
/* these */

#define RING_SIZE (OBOE_RING_SIZE_RX8 | OBOE_RING_SIZE_TX8)
#define TX_SLOTS    8
#define RX_SLOTS    8


/* Less user servicable parts below here */

/* Test, Transmit and receive buffer sizes, adjust at your peril */
/* remarks: nfs usually needs 1k blocks */
/* remarks: in SIR mode, CRC is received, -> RX_LEN=TX_LEN+2 */
/* remarks: test accepts large blocks. Standard is 0x80 */
/* When TT_LEN > RX_LEN (SIR mode) data is stored in successive slots. */
/* When 3 or more slots are needed for each test packet, */
/* data received in the first slots is overwritten, even */
/* if OBOE_CTL_RX_HW_OWNS is not set, without any error! */
#define TT_LEN      0x80
#define TX_LEN      0xc00
#define RX_LEN      0xc04
/* Real transmitted length (SIR mode) is about 14+(2%*TX_LEN) more */
/* long than user-defined length (see async_wrap_skb) and is less then 4K */
/* Real received length is (max RX_LEN) differs from user-defined */
/* length only b the CRC (2 or 4 bytes) */
#define BUF_SAFETY  0x7a
#define RX_BUF_SZ   (RX_LEN)
#define TX_BUF_SZ   (TX_LEN+BUF_SAFETY)


/* Logic of the netdev part of this driver                             */

/* The RX ring is filled with buffers, when a packet arrives           */
/* it is DMA'd into the buffer which is marked used and RxDone called  */
/* RxDone forms an skb (and checks the CRC if in SIR mode) and ships   */
/* the packet off upstairs */

/* The transmitter on the oboe chip can work in one of two modes       */
/* for each ring->tx[] the transmitter can either                      */
/* a) transmit the packet, leave the trasmitter enabled and proceed to */
/*    the next ring                                                    */
/* OR                                                                  */
/* b) transmit the packet, switch off the transmitter and issue TxDone */

/* All packets are entered into the ring in mode b), if the ring was   */
/* empty the transmitter is started.                                   */

/* If OPTIMIZE_TX is defined then in TxDone if the ring contains       */
/* more than one packet, all but the last are set to mode a) [HOWEVER  */
/* the hardware may not notice this, this is why we start in mode b) ] */
/* then restart the transmitter                                        */

/* If OPTIMIZE_TX is not defined then we just restart the transmitter  */
/* if the ring isn't empty */

/* Speed changes are delayed until the TxRing is empty                 */
/* mtt is handled by generating packets with bad CRCs, before the data */

/* TODO: */
/* check the mtt works ok      */
/* finish the watchdog         */

/* No user servicable parts below here */

#define STATIC static

#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/pci.h>
#include <linux/rtnetlink.h>

#include <asm/system.h>
#include <asm/io.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
//#include <net/irda/irmod.h>
//#include <net/irda/irlap_frame.h>
#include <net/irda/irda_device.h>
#include <net/irda/crc.h>

#include "donauboe.h"

#define INB(port)       inb_p(port)
#define OUTB(val,port)  outb_p(val,port)
#define OUTBP(val,port) outb_p(val,port)

#define PROMPT  OUTB(OBOE_PROMPT_BIT,OBOE_PROMPT);

#if PROBE_VERBOSE
#define PROBE_DEBUG(args...) (printk (args))
#else
#define PROBE_DEBUG(args...) ;
#endif

/* Set the DMA to be byte at a time */
#define CONFIG0H_DMA_OFF OBOE_CONFIG0H_RCVANY
#define CONFIG0H_DMA_ON_NORX CONFIG0H_DMA_OFF| OBOE_CONFIG0H_ENDMAC
#define CONFIG0H_DMA_ON CONFIG0H_DMA_ON_NORX | OBOE_CONFIG0H_ENRX

static struct pci_device_id toshoboe_pci_tbl[] __initdata = {
	{ PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_FIR701, PCI_ANY_ID, PCI_ANY_ID, },
	{ PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_FIRD01, PCI_ANY_ID, PCI_ANY_ID, },
	{ }			/* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, toshoboe_pci_tbl);

#define DRIVER_NAME "toshoboe"
static char *driver_name = DRIVER_NAME;

static int max_baud = 4000000;
static int do_probe = DO_PROBE;


/**********************************************************************/
/* Fcs code */

#ifdef CRC_EXPORTED
extern __u16 const irda_crc16_table[];
#else
static __u16 const irda_crc16_table[256] = {
  0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
  0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
  0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
  0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
  0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
  0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
  0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
  0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
  0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
  0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
  0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
  0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
  0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
  0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
  0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
  0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
  0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
  0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
  0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
  0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
  0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
  0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
  0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
  0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
  0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
  0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
  0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
  0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
  0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
  0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
  0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
  0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
#endif

STATIC int
toshoboe_checkfcs (unsigned char *buf, int len)
{
  int i;
  union
  {
    __u16 value;
    __u8 bytes[2];
  }
  fcs;

  fcs.value = INIT_FCS;

  for (i = 0; i < len; ++i)
    fcs.value = irda_fcs (fcs.value, *(buf++));

  return (fcs.value == GOOD_FCS);
}

/***********************************************************************/
/* Generic chip handling code */
#ifdef DUMP_PACKETS
static unsigned char dump[50];
STATIC void 
_dumpbufs (unsigned char *data, int len, char tete)
{
int i,j;
char head=tete;
for (i=0;i<len;i+=16) {
    for (j=0;j<16 && i+j<len;j++) { sprintf(&dump[3*j],"%02x.",data[i+j]); }
    dump [3*j]=0;
    IRDA_DEBUG (2, "%c%s\n",head , dump);
    head='+'; 
    }
}
#endif

/* Dump the registers */
STATIC void
toshoboe_dumpregs (struct toshoboe_cb *self)
{
  __u32 ringbase;

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

  ringbase = INB (OBOE_RING_BASE0) << 10;
  ringbase |= INB (OBOE_RING_BASE1) << 18;
  ringbase |= INB (OBOE_RING_BASE2) << 26;

  printk (KERN_ERR DRIVER_NAME ": Register dump:\n");
  printk (KERN_ERR "Interrupts: Tx:%d Rx:%d TxUnder:%d RxOver:%d Sip:%d\n",
          self->int_tx, self->int_rx, self->int_txunder, self->int_rxover,
          self->int_sip);
  printk (KERN_ERR "RX %02x TX %02x RingBase %08x\n",
          INB (OBOE_RXSLOT), INB (OBOE_TXSLOT), ringbase);
  printk (KERN_ERR "RING_SIZE %02x IER %02x ISR %02x\n",
          INB (OBOE_RING_SIZE), INB (OBOE_IER), INB (OBOE_ISR));
  printk (KERN_ERR "CONFIG1 %02x STATUS %02x\n",
          INB (OBOE_CONFIG1), INB (OBOE_STATUS));
  printk (KERN_ERR "CONFIG0 %02x%02x ENABLE %02x%02x\n",
          INB (OBOE_CONFIG0H), INB (OBOE_CONFIG0L),
          INB (OBOE_ENABLEH), INB (OBOE_ENABLEL));
  printk (KERN_ERR "NEW_PCONFIG %02x%02x CURR_PCONFIG %02x%02x\n",
          INB (OBOE_NEW_PCONFIGH), INB (OBOE_NEW_PCONFIGL),
          INB (OBOE_CURR_PCONFIGH), INB (OBOE_CURR_PCONFIGL));
  printk (KERN_ERR "MAXLEN %02x%02x RXCOUNT %02x%02x\n",
          INB (OBOE_MAXLENH), INB (OBOE_MAXLENL),
          INB (OBOE_RXCOUNTL), INB (OBOE_RXCOUNTH));

  if (self->ring)
    {
      int i;
      ringbase = virt_to_bus (self->ring);
      printk (KERN_ERR "Ring at %08x:\n", ringbase);
      printk (KERN_ERR "RX:");
      for (i = 0; i < RX_SLOTS; ++i)
        printk (" (%d,%02x)",self->ring->rx[i].len,self->ring->rx[i].control);
      printk ("\n");
      printk (KERN_ERR "TX:");
      for (i = 0; i < RX_SLOTS; ++i)
        printk (" (%d,%02x)",self->ring->tx[i].len,self->ring->tx[i].control);
      printk ("\n");
    }
}

/*Don't let the chip look at memory */
STATIC void
toshoboe_disablebm (struct toshoboe_cb *self)
{
  __u8 command;
  IRDA_DEBUG (4, "%s()\n", __FUNCTION__);

  pci_read_config_byte (self->pdev, PCI_COMMAND, &command);
  command &= ~PCI_COMMAND_MASTER;
  pci_write_config_byte (self->pdev, PCI_COMMAND, command);

}

/* Shutdown the chip and point the taskfile reg somewhere else */
STATIC void
toshoboe_stopchip (struct toshoboe_cb *self)
{
  IRDA_DEBUG (4, "%s()\n", __FUNCTION__);

  /*Disable interrupts */
  OUTB (0x0, OBOE_IER);
  /*Disable DMA, Disable Rx, Disable Tx */
  OUTB (CONFIG0H_DMA_OFF, OBOE_CONFIG0H);
  /*Disable SIR MIR FIR, Tx and Rx */
  OUTB (0x00, OBOE_ENABLEH);
  /*Point the ring somewhere safe */
  OUTB (0x3f, OBOE_RING_BASE2);
  OUTB (0xff, OBOE_RING_BASE1);
  OUTB (0xff, OBOE_RING_BASE0);

  OUTB (RX_LEN >> 8, OBOE_MAXLENH);
  OUTB (RX_LEN & 0xff, OBOE_MAXLENL);

  /*Acknoledge any pending interrupts */
  OUTB (0xff, OBOE_ISR);

  /*Why */
  OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);

  /*switch it off */
  OUTB (OBOE_CONFIG1_OFF, OBOE_CONFIG1);

  toshoboe_disablebm (self);
}

/* Transmitter initialization */
STATIC void
toshoboe_start_DMA (struct toshoboe_cb *self, int opts)
{
  OUTB (0x0, OBOE_ENABLEH);
  OUTB (CONFIG0H_DMA_ON | opts,  OBOE_CONFIG0H);
  OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
  PROMPT;
}

/*Set the baud rate */
STATIC void
toshoboe_setbaud (struct toshoboe_cb *self)
{
  __u16 pconfig = 0;
  __u8 config0l = 0;

  IRDA_DEBUG (2, "%s(%d/%d)\n", __FUNCTION__, self->speed, self->io.speed);

  switch (self->speed)
    {
    case 2400:
    case 4800:
    case 9600:
    case 19200:
    case 38400:
    case 57600:
    case 115200:
#ifdef USE_MIR
    case 1152000:
#endif
    case 4000000:
      break;
    default:

      printk (KERN_ERR DRIVER_NAME ": switch to unsupported baudrate %d\n",
              self->speed);
      return;
    }

  switch (self->speed)
    {
      /* For SIR the preamble is done by adding XBOFs */
      /* to the packet */
      /* set to filtered SIR mode, filter looks for BOF and EOF */
    case 2400:
      pconfig |= 47 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 4800:
      pconfig |= 23 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 9600:
      pconfig |= 11 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 19200:
      pconfig |= 5 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 38400:
      pconfig |= 2 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 57600:
      pconfig |= 1 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    case 115200:
      pconfig |= 0 << OBOE_PCONFIG_BAUDSHIFT;
      pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
      break;
    default:
      /*Set to packet based reception */
      OUTB (RX_LEN >> 8, OBOE_MAXLENH);
      OUTB (RX_LEN & 0xff, OBOE_MAXLENL);
      break;
    }

  switch (self->speed)
    {
    case 2400:
    case 4800:
    case 9600:
    case 19200: