patch-2.1.132 linux/drivers/net/irda/pc87108.c
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- Lines: 1501
- Date:
Fri Dec 18 08:06:39 1998
- Orig file:
v2.1.131/linux/drivers/net/irda/pc87108.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.131/linux/drivers/net/irda/pc87108.c linux/drivers/net/irda/pc87108.c
@@ -0,0 +1,1500 @@
+/*********************************************************************
+ *
+ * Filename: pc87108.c
+ * Version: 0.8
+ * Description: FIR/MIR driver for the NS PC87108 chip
+ * Status: Experimental.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Sat Nov 7 21:43:15 1998
+ * Modified at: Mon Dec 14 11:40:24 1998
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1998 Dag Brattli <dagb@cs.uit.no>
+ * Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
+ * Copyright (c) 1998 Actisys Corp., www.actisys.com
+ * 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 Dag Brattli nor University of Tromsų admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ * Notice that all functions that needs to access the chip in _any_
+ * way, must save BSR register on entry, and restore it on exit.
+ * It is _very_ important to follow this policy!
+ *
+ * __u8 bank;
+ *
+ * bank = inb( iobase+BSR);
+ *
+ * do_your_stuff_here();
+ *
+ * outb( bank, iobase+BSR);
+ *
+ * If you find bugs in this file, its very likely that the same bug
+ * will also be in w83977af_ir.c since the implementations is quite
+ * similar.
+ *
+ ********************************************************************/
+
+#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/malloc.h>
+#include <linux/delay.h>
+#include <linux/init.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/irmod.h>
+#include <net/irda/irlap_frame.h>
+#include <net/irda/irda_device.h>
+
+#include <net/irda/pc87108.h>
+
+#define BROKEN_DONGLE_ID
+
+static char *driver_name = "pc87108";
+
+#define CHIP_IO_EXTENT 8
+
+static unsigned int io[] = { 0x2f8, ~0, ~0, ~0 };
+static unsigned int io2[] = { 0x150, 0, 0, 0};
+static unsigned int irq[] = { 3, 0, 0, 0 };
+static unsigned int dma[] = { 0, 0, 0, 0 };
+
+static struct pc87108 *dev_self[] = { NULL, NULL, NULL, NULL};
+
+static char *dongle_types[] = {
+ "Differential serial interface",
+ "Differential serial interface",
+ "Reserved",
+ "Reserved",
+ "Sharp RY5HD01",
+ "Reserved",
+ "Single-ended serial interface",
+ "Consumer-IR only",
+ "HP HSDL-2300, HP HSDL-3600/HSDL-3610",
+ "IBM31T1100 or Temic TFDS6000/TFDS6500",
+ "Reserved",
+ "Reserved",
+ "HP HSDL-1100/HSDL-2100",
+ "HP HSDL-1100/HSDL-2100"
+ "Supports SIR Mode only",
+ "No dongle connected",
+};
+
+/* Some prototypes */
+static int pc87108_open( int i, unsigned int iobase, unsigned int board_addr,
+ unsigned int irq, unsigned int dma);
+static int pc87108_close( struct irda_device *idev);
+static int pc87108_probe( int iobase, int board_addr, int irq, int dma);
+static void pc87108_pio_receive( struct irda_device *idev);
+static int pc87108_dma_receive( struct irda_device *idev);
+static int pc87108_dma_receive_complete(struct irda_device *idev, int iobase);
+static int pc87108_hard_xmit( struct sk_buff *skb, struct device *dev);
+static int pc87108_pio_write( int iobase, __u8 *buf, int len, int fifo_size);
+static void pc87108_dma_write( struct irda_device *idev, int iobase);
+static void pc87108_change_speed( struct irda_device *idev, int baud);
+static void pc87108_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void pc87108_wait_until_sent( struct irda_device *idev);
+static int pc87108_is_receiving( struct irda_device *idev);
+static int pc87108_read_dongle_id ( int iobase);
+static void pc87108_init_dongle_interface ( int iobase, int dongle_id);
+
+static int pc87108_net_init( struct device *dev);
+static int pc87108_net_open( struct device *dev);
+static int pc87108_net_close( struct device *dev);
+
+/*
+ * Function pc87108_init ()
+ *
+ * Initialize chip. Just try to find out how many chips we are dealing with
+ * and where they are
+ */
+__initfunc(int pc87108_init(void))
+{
+ int i;
+
+ DEBUG( 0, __FUNCTION__ "()\n");
+
+
+ for ( i=0; (io[i] < 2000) && (i < 4); i++) {
+ int ioaddr = io[i];
+ if (check_region(ioaddr, CHIP_IO_EXTENT))
+ continue;
+ if (pc87108_open( i, io[i], io2[i], irq[i], dma[i]) == 0)
+ return 0;
+ }
+ return -ENODEV;
+}
+
+/*
+ * Function pc87108_cleanup ()
+ *
+ * Close all configured chips
+ *
+ */
+#ifdef MODULE
+static void pc87108_cleanup(void)
+{
+ int i;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ for ( i=0; i < 4; i++) {
+ if ( dev_self[i])
+ pc87108_close( &(dev_self[i]->idev));
+ }
+}
+#endif /* MODULE */
+
+/*
+ * Function pc87108_open (iobase, irq)
+ *
+ * Open driver instance
+ *
+ */
+static int pc87108_open( int i, unsigned int iobase, unsigned int board_addr,
+ unsigned int irq, unsigned int dma)
+{
+ struct pc87108 *self;
+ struct irda_device *idev;
+ int ret;
+ int dongle_id;
+
+ DEBUG( 0, __FUNCTION__ "()\n");
+
+ if (( dongle_id = pc87108_probe( iobase, board_addr, irq, dma)) == -1)
+ return -1;
+
+ /*
+ * Allocate new instance of the driver
+ */
+ self = kmalloc( sizeof(struct pc87108), GFP_KERNEL);
+ if ( self == NULL) {
+ printk( KERN_ERR "IrDA: Can't allocate memory for "
+ "IrDA control block!\n");
+ return -ENOMEM;
+ }
+ memset( self, 0, sizeof(struct pc87108));
+
+ /* Need to store self somewhere */
+ dev_self[i] = self;
+
+ idev = &self->idev;
+
+ /* Initialize IO */
+ idev->io.iobase = iobase;
+ idev->io.irq = irq;
+ idev->io.io_ext = CHIP_IO_EXTENT;
+ idev->io.dma = dma;
+ idev->io.fifo_size = 32;
+
+ /* Lock the port that we need */
+ ret = check_region( idev->io.iobase, idev->io.io_ext);
+ if ( ret < 0) {
+ DEBUG( 0, __FUNCTION__ "(), can't get iobase of 0x%03x\n",
+ idev->io.iobase);
+ /* pc87108_cleanup( self->idev); */
+ return -ENODEV;
+ }
+ request_region( idev->io.iobase, idev->io.io_ext, idev->name);
+
+ /* Initialize QoS for this device */
+ irda_init_max_qos_capabilies( &idev->qos);
+
+ /* The only value we must override it the baudrate */
+ idev->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
+ IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
+
+ idev->qos.min_turn_time.bits = 0x07;
+ irda_qos_bits_to_value( &idev->qos);
+
+ /* Specify which buffer allocation policy we need */
+ idev->rx_buff.flags = GFP_KERNEL | GFP_DMA;
+ idev->tx_buff.flags = GFP_KERNEL | GFP_DMA;
+
+ /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
+ idev->rx_buff.truesize = 14384;
+ idev->tx_buff.truesize = 4000;
+
+ /* Initialize callbacks */
+ idev->hard_xmit = pc87108_hard_xmit;
+ idev->change_speed = pc87108_change_speed;
+ idev->wait_until_sent = pc87108_wait_until_sent;
+ idev->is_receiving = pc87108_is_receiving;
+
+ /* Override the network functions we need to use */
+ idev->netdev.init = pc87108_net_init;
+ idev->netdev.hard_start_xmit = pc87108_hard_xmit;
+ idev->netdev.open = pc87108_net_open;
+ idev->netdev.stop = pc87108_net_close;
+
+ idev->io.dongle_id = dongle_id;
+ pc87108_init_dongle_interface( iobase, dongle_id);
+
+ /* Open the IrDA device */
+ irda_device_open( idev, driver_name, self);
+
+ return 0;
+}
+
+/*
+ * Function pc87108_close (idev)
+ *
+ * Close driver instance
+ *
+ */
+static int pc87108_close( struct irda_device *idev)
+{
+ int iobase;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ ASSERT( idev != NULL, return -1;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;);
+
+ iobase = idev->io.iobase;
+
+ /* Release the PORT that this driver is using */
+ DEBUG( 4, __FUNCTION__ "(), Releasing Region %03x\n",
+ idev->io.iobase);
+ release_region( idev->io.iobase, idev->io.io_ext);
+
+ irda_device_close( idev);
+
+ return 0;
+}
+
+/*
+ * Function pc87108_probe (iobase, board_addr, irq, dma)
+ *
+ * Returns non-negative on success.
+ *
+ */
+static int pc87108_probe( int iobase, int board_addr, int irq, int dma)
+{
+ int version;
+ __u8 temp=0;
+ int dongle_id;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Base Address and Interrupt Control Register BAIC */
+ outb(0, board_addr);
+ switch ( iobase) {
+ case 0x3E8: outb( 0x14, board_addr+1); break;
+ case 0x2E8: outb( 0x15, board_addr+1); break;
+ case 0x3F8: outb( 0x16, board_addr+1); break;
+ case 0x2F8: outb( 0x17, board_addr+1); break;
+ default: DEBUG(0, __FUNCTION__ "(), invalid base_address");
+ }
+
+ /* Control Signal Routing Register CSRT */
+ switch (irq) {
+ case 3: temp = 0x01; break;
+ case 4: temp = 0x02; break;
+ case 5: temp = 0x03; break;
+ case 7: temp = 0x04; break;
+ case 9: temp = 0x05; break;
+ case 11: temp = 0x06; break;
+ case 15: temp = 0x07; break;
+ default: DEBUG( 0, __FUNCTION__ "(), invalid irq");
+ }
+ outb( 1, board_addr);
+
+ switch (dma) {
+ case 0: outb( 0x08+temp, board_addr+1); break;
+ case 1: outb( 0x10+temp, board_addr+1); break;
+ case 3: outb( 0x18+temp, board_addr+1); break;
+ default: DEBUG( 0, __FUNCTION__ "(), invalid dma");
+ }
+
+ /* Mode Control Register MCTL */
+ outb( 2, board_addr);
+ outb( 0x03, board_addr+1);
+
+ /* read the Module ID */
+ switch_bank( iobase, BANK3);
+ version = inb( iobase+MID);
+
+ /* should be 0x2? */
+ if (0x20 != (version & 0xf0))
+ {
+ DEBUG( 0, __FUNCTION__ "(), Wrong chip version");
+ return -1;
+ }
+
+ /* Switch to advanced mode */
+ switch_bank( iobase, BANK2);
+ outb( ECR1_EXT_SL, iobase+ECR1);
+ switch_bank( iobase, BANK0);
+
+ dongle_id = pc87108_read_dongle_id( iobase);
+ DEBUG( 0, __FUNCTION__ "(), Found dongle: %s\n",
+ dongle_types[ dongle_id]);
+
+ /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
+ switch_bank( iobase, BANK0);
+ outb( FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
+
+ /* Set FIFO size to 32 */
+ switch_bank( iobase, BANK2);
+ outb( EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
+
+ /* IRCR2: FEND_MD is set */
+ switch_bank( iobase, BANK5);
+ outb( 0x2a, iobase+4);
+
+ /* Make sure that some defaults are OK */
+ switch_bank( iobase, BANK6);
+ outb( 0x20, iobase+0); /* Set 32 bits FIR CRC */
+ outb( 0x0a, iobase+1); /* Set MIR pulse width */
+ outb( 0x0d, iobase+2); /* Set SIR pulse width */
+ outb( 0x2a, iobase+4); /* Set beginning frag, and preamble length */
+
+ /* Receiver frame length */
+ switch_bank( iobase, BANK4);
+ outb( 4000 & 0xff, iobase+6);
+ outb(( 4000 >> 8) & 0x1f, iobase+7);
+
+ /* Transmitter frame length */
+ outb( 4000 & 0xff, iobase+4);
+ outb(( 4000 >> 8) & 0x1f, iobase+5);
+
+ DEBUG( 0, "PC87108 driver loaded. Version: 0x%02x\n", version);
+
+ /* Enable receive interrupts */
+ switch_bank( iobase, BANK0);
+ outb( IER_RXHDL_IE, iobase+IER);
+
+ return dongle_id;
+}
+
+/*
+ * Function pc87108_read_dongle_id (void)
+ *
+ * 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 pc87108_read_dongle_id ( int iobase)
+{
+ int dongle_id;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ bank = inb( iobase+BSR);
+
+ /* Select Bank 7 */
+ switch_bank( iobase, BANK7);
+
+ /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
+ outb( 0x00, iobase+7);
+
+ /* ID0, 1, and 2 are pulled up/down very slowly */
+ udelay(50);
+
+ /* IRCFG1: read the ID bits */
+ dongle_id = inb( iobase+4) & 0x0f;
+
+#ifdef BROKEN_DONGLE_ID
+ if ( dongle_id == 0x0a)
+ dongle_id = 0x09;
+#endif
+
+ /* Go back to bank 0 before returning */
+ switch_bank( iobase, BANK0);
+
+ DEBUG( 0, __FUNCTION__ "(), Dongle = %#x\n", dongle_id);
+
+ outb( bank, iobase+BSR);
+
+ return dongle_id;
+}
+
+/*
+ * Function pc87108_init_dongle_interface (iobase, dongle_id)
+ *
+ * This function initializes the dongle for the transceiver that is
+ * used. This procedure needs to be executed once after
+ * power-on/reset. It also needs to be used whenever you suspect that
+ * the dongle is changed.
+ */
+static void pc87108_init_dongle_interface ( int iobase, int dongle_id)
+{
+ int bank;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Select Bank 7 */
+ switch_bank( iobase, BANK7);
+
+ /* IRCFG4: set according to dongle_id */
+ switch (dongle_id) {
+ case 0x00: /* same as */
+ case 0x01: /* Differential serial interface */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x02: /* same as */
+ case 0x03: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x04: /* Sharp RY5HD01 */
+ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x05: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet",
+ dongle_types[dongle_id]);
+ break;
+ case 0x06: /* Single-ended serial interface */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x07: /* Consumer-IR only */
+ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
+ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
+ outb_p( 0x28, iobase+7); /* Set irsl[0-2] as output */
+ break;
+ case 0x0A: /* same as */
+ case 0x0B: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x0C: /* same as */
+ case 0x0D: /* HP HSDL-1100/HSDL-2100 */
+ /*
+ * Set irsl0 as input, irsl[1-2] as output, and separate
+ * inputs are used for SIR and MIR/FIR
+ */
+ outb( 0x48, iobase+7);
+ break;
+ case 0x0E: /* Supports SIR Mode only */
+ outb( 0x28, iobase+7); /* Set irsl[0-2] as output */
+ break;
+ case 0x0F: /* No dongle connected */
+ DEBUG( 0, __FUNCTION__ "(), %s\n",
+ dongle_types[dongle_id]);
+ DEBUG( 0, "***\n");
+
+ switch_bank( iobase, BANK0);
+ outb( 0x62, iobase+MCR);
+ break;
+ default:
+ DEBUG( 0, __FUNCTION__ "(), invalid dongle_id %#x", dongle_id);
+ }
+
+ /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
+ outb( 0x00, iobase+4);
+
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+} /* set_up_dongle_interface */
+
+/*
+ * Function pc87108_change_dongle_speed (iobase, speed, dongle_id)
+ *
+ * Change speed of the attach dongle
+ *
+ */
+static void pc87108_change_dongle_speed( int iobase, int speed, int dongle_id)
+{
+ unsigned long flags;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Select Bank 7 */
+ switch_bank( iobase, BANK7);
+
+ /* IRCFG1: set according to dongle_id */
+ switch (dongle_id) {
+ case 0x00: /* same as */
+ case 0x01: /* Differential serial interface */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x02: /* same as */
+ case 0x03: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x04: /* Sharp RY5HD01 */
+ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ case 0x05: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x06: /* Single-ended serial interface */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x07: /* Consumer-IR only */
+ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
+ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
+ switch_bank( iobase, BANK7);
+ outb_p( 0x01, iobase+4);
+
+ if ( speed == 4000000) {
+ save_flags(flags);
+ cli();
+ outb( 0x81, iobase+4);
+ outb( 0x80, iobase+4);
+ restore_flags(flags);
+ }
+ else
+ outb_p( 0x00, iobase+4);
+ break;
+ case 0x0A: /* same as */
+ case 0x0B: /* Reserved */
+ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x0C: /* same as */
+ case 0x0D: /* HP HSDL-1100/HSDL-2100 */
+ break;
+ case 0x0E: /* Supports SIR Mode only */
+ break;
+ case 0x0F: /* No dongle connected */
+ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n",
+ dongle_types[dongle_id]);
+
+ switch_bank( iobase, BANK0);
+ outb( 0x62, iobase+MCR);
+ break;
+ default:
+ DEBUG( 0, __FUNCTION__ "(), invalid data_rate\n");
+ }
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+}
+
+/*
+ * Function pc87108_change_speed (idev, baud)
+ *
+ * Change the speed of the device
+ *
+ */
+static void pc87108_change_speed( struct irda_device *idev, int speed)
+{
+ __u8 mcr = MCR_SIR;
+ __u8 bank;
+ int iobase;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ ASSERT( idev != NULL, return;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;);
+
+ iobase = idev->io.iobase;
+
+ /* Update accounting for new speed */
+ idev->io.baudrate = speed;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Disable interrupts */
+ switch_bank( iobase, BANK0);
+ outb( 0, iobase+IER);
+
+ /* Select Bank 2 */
+ switch_bank( iobase, BANK2);
+
+ outb( 0x00, iobase+BGDH);
+ switch ( speed) {
+ case 9600: outb( 0x0c, iobase+BGDL); break;
+ case 19200: outb( 0x06, iobase+BGDL); break;
+ case 37600: outb( 0x03, iobase+BGDL); break;
+ case 57600: outb( 0x02, iobase+BGDL); break;
+ case 115200: outb( 0x01, iobase+BGDL); break;
+ case 576000:
+ switch_bank( iobase, BANK5);
+
+ /* IRCR2: MDRS is set */
+ outb( inb( iobase+4) | 0x04, iobase+4);
+
+ mcr = MCR_MIR;
+ DEBUG(0, __FUNCTION__ "(), handling baud of 576000\n");
+ break;
+ case 1152000:
+ mcr = MCR_MIR;
+ DEBUG(0, __FUNCTION__ "(), handling baud of 1152000\n");
+ break;
+ case 4000000:
+ mcr = MCR_FIR;
+ DEBUG(0, __FUNCTION__ "(), handling baud of 4000000\n");
+ break;
+ default:
+ mcr = MCR_FIR;
+ DEBUG( 0, __FUNCTION__ "(), unknown baud rate of %d\n", speed);
+ break;
+ }
+
+ /* Set appropriate speed mode */
+ switch_bank(iobase, BANK0);
+ outb( mcr|MCR_TX_DFR, iobase+MCR);
+
+ /* Give some hits to the transceiver */
+ pc87108_change_dongle_speed( iobase, speed, idev->io.dongle_id);
+
+ /* Set FIFO threshold to TX17, RX16 */
+ switch_bank( iobase, BANK0);
+ outb( FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
+ /* outb( 0xa7, iobase+FCR); */
+
+ /* Set FIFO size to 32 */
+ switch_bank( iobase, BANK2);
+ outb( EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
+
+ idev->netdev.tbusy = 0;
+
+ /* Enable some interrupts so we can receive frames */
+ switch_bank( iobase, BANK0);
+ if ( speed > 115200) {
+ outb( IER_SFIF_IE, iobase+IER);
+ pc87108_dma_receive( idev);
+ } else
+ outb( IER_RXHDL_IE, iobase+IER);
+
+ /* Restore BSR */
+ outb( bank, iobase+BSR);
+}
+
+/*
+ * Function pc87108_hard_xmit (skb, dev)
+ *
+ * Transmit the frame!
+ *
+ */
+static int pc87108_hard_xmit( struct sk_buff *skb, struct device *dev)
+{
+ struct irda_device *idev;
+ int iobase;
+ __u8 bank;
+ int mtt;
+
+ idev = (struct irda_device *) dev->priv;
+
+ ASSERT( idev != NULL, return 0;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;);
+
+ iobase = idev->io.iobase;
+
+ DEBUG(4, __FUNCTION__ "(%ld), skb->len=%d\n", jiffies, (int) skb->len);
+
+ if ( dev->tbusy) {
+ DEBUG( 4, __FUNCTION__ "(), tbusy==TRUE\n");
+
+ return -EBUSY;
+ }
+
+ /* Lock transmit buffer */
+ if ( irda_lock( (void *) &dev->tbusy) == FALSE)
+ return -EBUSY;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Decide if we should use PIO or DMA transfer */
+ if ( idev->io.baudrate > 115200) {
+ memcpy( idev->tx_buff.data, skb->data, skb->len);
+ idev->tx_buff.len = skb->len;
+ idev->tx_buff.head = idev->tx_buff.data;
+ idev->tx_buff.offset = 0;
+
+ mtt = irda_get_mtt( skb);
+ if ( mtt > 50) {
+ /* Adjust for timer resolution */
+ mtt = mtt / 125 + 1;
+
+ /* Setup timer */
+ switch_bank( iobase, BANK4);
+ outb( mtt & 0xff, iobase+TMRL);
+ outb(( mtt >> 8) & 0x0f, iobase+TMRH);
+
+ /* Start timer */
+ outb( IRCR1_TMR_EN, iobase+IRCR1);
+ idev->io.direction = IO_XMIT;
+
+ /* Enable timer interrupt */
+ switch_bank( iobase, BANK0);
+ outb( IER_TMR_IE, iobase+IER);
+ } else {
+ /* Use udelay for delays less than 50 us. */
+ if (mtt)
+ udelay( mtt);
+
+ /* Enable DMA interrupt */
+ switch_bank( iobase, BANK0);
+ outb( IER_DMA_IE, iobase+IER);
+ pc87108_dma_write( idev, iobase);
+ }
+ } else {
+ idev->tx_buff.len = async_wrap_skb( skb, idev->tx_buff.data,
+ idev->tx_buff.truesize);
+
+ idev->tx_buff.offset = 0;
+ idev->tx_buff.head = idev->tx_buff.data;
+
+ /* Add interrupt on tx low level (will fire immediately) */
+ switch_bank( iobase, BANK0);
+ outb( IER_TXLDL_IE, iobase+IER);
+ }
+ dev_kfree_skb( skb);
+
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ return 0;
+}
+
+/*
+ * Function pc87108_dma_xmit (idev, iobase)
+ *
+ * Transmit data using DMA
+ *
+ */
+static void pc87108_dma_write( struct irda_device *idev, int iobase)
+{
+ int bsr;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Save current bank */
+ bsr = inb( iobase+BSR);
+
+ /* Disable DMA */
+ switch_bank(iobase, BANK0);
+ outb( inb( iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
+
+ setup_dma( idev->io.dma, idev->tx_buff.data, idev->tx_buff.len,
+ DMA_MODE_WRITE);
+
+ /* idev->media_busy = TRUE; */
+ idev->io.direction = IO_XMIT;
+
+ /* Choose transmit DMA channel */
+ switch_bank(iobase, BANK2);
+ outb( inb( iobase+ECR1) | ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL,
+ iobase+ECR1);
+
+ /* Enable DMA */
+ switch_bank( iobase, BANK0);
+ outb( inb( iobase+MCR)|MCR_DMA_EN, iobase+MCR);
+
+ /* Restore bank register */
+ outb( bsr, iobase+BSR);
+}
+
+/*
+ * Function pc87108_pio_xmit (idev, iobase)
+ *
+ * Transmit data using PIO. Returns the number of bytes that actually
+ * got transfered
+ *
+ */
+static int pc87108_pio_write( int iobase, __u8 *buf, int len, int fifo_size)
+{
+ int actual = 0;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ switch_bank( iobase, BANK0);
+ if (!(inb_p( iobase+LSR) & LSR_TXEMP)) {
+ DEBUG( 4, __FUNCTION__ "(), warning, FIFO not empty yet!\n");
+
+ fifo_size -= 17;
+ DEBUG( 4, __FUNCTION__ "%d bytes left in tx fifo\n", fifo_size);
+ }
+
+ /* Fill FIFO with current frame */
+ while (( fifo_size-- > 0) && (actual < len)) {
+ /* Transmit next byte */
+ outb( buf[actual++], iobase+TXD);
+ }
+
+ DEBUG( 4, __FUNCTION__ "(), fifo_size %d ; %d sent of %d\n",
+ fifo_size, actual, len);
+
+ /* Restore bank */
+ outb( bank, iobase+BSR);
+
+ return actual;
+}
+
+/*
+ * Function pc87108_dma_xmit_complete (idev)
+ *
+ * The transfer of a frame in finished. This function will only be called
+ * by the interrupt handler
+ *
+ */
+static void pc87108_dma_xmit_complete( struct irda_device *idev)
+{
+ int iobase;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ ASSERT( idev != NULL, return;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;);
+
+ iobase = idev->io.iobase;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Disable DMA */
+ switch_bank( iobase, BANK0);
+ outb( inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
+
+ /* Check for underrrun! */
+ if ( inb( iobase+ASCR) & ASCR_TXUR) {
+ idev->stats.tx_errors++;
+ idev->stats.tx_fifo_errors++;
+
+ /* Clear bit, by writing 1 to it */
+ outb( ASCR_TXUR, iobase+ASCR);
+ } else {
+ idev->stats.tx_packets++;
+ idev->stats.tx_bytes += idev->tx_buff.len;
+ }
+
+ /* Unlock tx_buff and request another frame */
+ idev->netdev.tbusy = 0; /* Unlock */
+ idev->media_busy = FALSE;
+
+ /* Tell the network layer, that we can accept more frames */
+ mark_bh( NET_BH);
+
+ /* Restore bank */
+ outb( bank, iobase+BSR);
+}
+
+/*
+ * Function pc87108_dma_receive (idev)
+ *
+ * Get ready for receiving a frame. The device will initiate a DMA
+ * if it starts to receive a frame.
+ *
+ */
+static int pc87108_dma_receive( struct irda_device *idev)
+{
+ struct pc87108 *self;
+ int iobase;
+ __u8 bsr;
+
+ ASSERT( idev != NULL, return -1;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;);
+
+ DEBUG( 4, __FUNCTION__ "\n");
+
+ self = idev->priv;
+ iobase= idev->io.iobase;
+
+ /* Save current bank */
+ bsr = inb( iobase+BSR);
+
+ /* Disable DMA */
+ switch_bank( iobase, BANK0);
+ outb( inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
+
+ setup_dma( idev->io.dma, idev->rx_buff.data, idev->rx_buff.truesize,
+ DMA_MODE_READ);
+
+ /* driver->media_busy = FALSE; */
+ idev->io.direction = IO_RECV;
+ idev->rx_buff.head = idev->rx_buff.data;
+ idev->rx_buff.offset = 0;
+
+ /* Reset Rx FIFO. This will also flush the ST_FIFO */
+ outb( FCR_RXTH|FCR_TXTH|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
+ self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0;
+
+ /* Choose DMA Rx, DMA Fairness, and Advanced mode */
+ switch_bank(iobase, BANK2);
+ outb(( inb( iobase+ECR1) & ~ECR1_DMASWP)|ECR1_DMANF|ECR1_EXT_SL,
+ iobase+ECR1);
+
+ /* enable DMA */
+ switch_bank(iobase, BANK0);
+ outb( inb( iobase+MCR)|MCR_DMA_EN, iobase+MCR);
+
+ /* Restore bank register */
+ outb( bsr, iobase+BSR);
+
+ DEBUG( 4, __FUNCTION__ "(), done!\n");
+
+ return 0;
+}
+
+/*
+ * Function pc87108_dma_receive_complete (idev)
+ *
+ * Finished with receiving frames
+ *
+ *
+ */
+static int pc87108_dma_receive_complete( struct irda_device *idev, int iobase)
+{
+ struct sk_buff *skb;
+ struct pc87108 *self;
+ struct st_fifo *st_fifo;
+ int len;
+ __u8 bank;
+ __u8 status;
+
+ self = idev->priv;
+ st_fifo = &self->st_fifo;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ iobase = idev->io.iobase;
+
+ /* Read status FIFO */
+ switch_bank(iobase, BANK5);
+ while (( status = inb( iobase+FRM_ST)) & FRM_ST_VLD) {
+ st_fifo->entries[ st_fifo->tail].status = status;
+
+ st_fifo->entries[ st_fifo->tail].len = inb(iobase+RFLFL);
+ st_fifo->entries[ st_fifo->tail].len |= inb(iobase+RFLFH) << 8;
+
+ st_fifo->tail++;
+ st_fifo->len++;
+ }
+
+ /* Try to process all entries in status FIFO */
+ switch_bank( iobase, BANK0);
+ while ( st_fifo->len) {
+
+ /* Get first entry */
+ status = st_fifo->entries[ st_fifo->head].status;
+ len = st_fifo->entries[ st_fifo->head].len;
+ st_fifo->head++;
+ st_fifo->len--;
+
+ /* Check for errors */
+ if ( status & FRM_ST_ERR_MSK) {
+ if ( status & FRM_ST_LOST_FR) {
+ /* Add number of lost frames to stats */
+ idev->stats.rx_errors += len;
+ } else {
+ /* Skip frame */
+ idev->stats.rx_errors++;
+
+ idev->rx_buff.offset += len;
+ idev->rx_buff.head += len;
+
+ if ( status & FRM_ST_MAX_LEN)
+ idev->stats.rx_length_errors++;
+
+ if ( status & FRM_ST_PHY_ERR)
+ idev->stats.rx_frame_errors++;
+
+ if ( status & FRM_ST_BAD_CRC)
+ idev->stats.rx_crc_errors++;
+ }
+ /* The errors below can be reported in both cases */
+ if ( status & FRM_ST_OVR1)
+ idev->stats.rx_fifo_errors++;
+
+ if ( status & FRM_ST_OVR2)
+ idev->stats.rx_fifo_errors++;
+
+ } else {
+ /* Check if we have transfered all data to memory */
+ if ( inb( iobase+LSR) & LSR_RXDA) {
+ /* Put this entry back in fifo */
+ st_fifo->head--;
+ st_fifo->len++;
+ st_fifo->entries[ st_fifo->head].status = status;
+ st_fifo->entries[ st_fifo->head].len = len;
+
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ return FALSE; /* I'll be back! */
+ }
+
+ /* Should be OK then */
+ skb = dev_alloc_skb( len+1);
+ if (skb == NULL) {
+ printk( KERN_INFO __FUNCTION__
+ "(), memory squeeze, dropping frame.\n");
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ return FALSE;
+ }
+
+ /* Make sure IP header gets aligned */
+ skb_reserve( skb, 1);
+
+ /* Copy frame without CRC */
+ if ( idev->io.baudrate < 4000000) {
+ skb_put( skb, len-2);
+ memcpy( skb->data, idev->rx_buff.head, len-2);
+ } else {
+ skb_put( skb, len-4);
+ memcpy( skb->data, idev->rx_buff.head, len-4);
+ }
+
+ /* Move to next frame */
+ idev->rx_buff.offset += len;
+ idev->rx_buff.head += len;
+ idev->stats.rx_packets++;
+
+ skb->dev = &idev->netdev;
+ skb->mac.raw = skb->data;
+ skb->protocol = htons(ETH_P_IRDA);
+ netif_rx( skb);
+ }
+ }
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ return TRUE;
+}
+
+/*
+ * Function pc87108_pio_receive (idev)
+ *
+ * Receive all data in receiver FIFO
+ *
+ */
+static void pc87108_pio_receive( struct irda_device *idev)
+{
+ __u8 byte = 0x00;
+ int iobase;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ ASSERT( idev != NULL, return;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;);
+
+ iobase = idev->io.iobase;
+
+ if ( idev->rx_buff.len == 0) {
+ idev->rx_buff.head = idev->rx_buff.data;
+ }
+
+ /* Receive all characters in Rx FIFO */
+ do {
+ byte = inb( iobase+RXD);
+ async_unwrap_char( idev, byte);
+
+ } while ( inb( iobase+LSR) & LSR_RXDA); /* Data available */
+}
+
+/*
+ * Function pc87108_sir_interrupt (idev, eir)
+ *
+ * Handle SIR interrupt
+ *
+ */
+static __u8 pc87108_sir_interrupt( struct irda_device *idev, int eir)
+{
+ int len;
+ int actual;
+ __u8 new_ier = 0;
+
+ /* Transmit FIFO low on data */
+ if ( eir & EIR_TXLDL_EV) {
+ /* Write data left in transmit buffer */
+ len = idev->tx_buff.len - idev->tx_buff.offset;
+
+ ASSERT( len > 0, return 0;);
+ actual = pc87108_pio_write( idev->io.iobase,
+ idev->tx_buff.head,
+ len, idev->io.fifo_size);
+ idev->tx_buff.offset += actual;
+ idev->tx_buff.head += actual;
+
+ idev->io.direction = IO_XMIT;
+ ASSERT( actual <= len, return 0;);
+
+ /* Check if finished */
+ if ( actual == len) {
+ DEBUG( 4, __FUNCTION__ "(), finished with frame!\n");
+ idev->netdev.tbusy = 0; /* Unlock */
+ idev->stats.tx_packets++;
+
+ mark_bh(NET_BH);
+
+ new_ier |= IER_TXEMP_IE;
+ } else
+ new_ier |= IER_TXLDL_IE;
+ }
+ /* Check if transmission has completed */
+ if ( eir & EIR_TXEMP_EV) {
+
+ /* Turn around and get ready to receive some data */
+ idev->io.direction = IO_RECV;
+ new_ier |= IER_RXHDL_IE;
+ }
+
+ /* Rx FIFO threshold or timeout */
+ if ( eir & EIR_RXHDL_EV) {
+ pc87108_pio_receive( idev);
+
+ /* Keep receiving */
+ new_ier |= IER_RXHDL_IE;
+ }
+ return new_ier;
+}
+
+/*
+ * Function pc87108_fir_interrupt (idev, eir)
+ *
+ * Handle MIR/FIR interrupt
+ *
+ */
+static __u8 pc87108_fir_interrupt( struct irda_device *idev, int iobase,
+ int eir)
+{
+ __u8 new_ier = 0;
+ __u8 bank;
+
+ bank = inb( iobase+BSR);
+
+ /* Status event, or end of frame detected in FIFO */
+ if ( eir & (EIR_SFIF_EV|EIR_LS_EV)) {
+ if ( pc87108_dma_receive_complete( idev, iobase)) {
+
+ /* Wait for next status FIFO interrupt */
+ new_ier |= IER_SFIF_IE;
+ } else {
+ /* DMA not finished yet */
+
+ /* Set timer value, resolution 125 us */
+ switch_bank( iobase, BANK4);
+ outb( 0x0f, iobase+TMRL); /* 125 us */
+ outb( 0x00, iobase+TMRH);
+
+ /* Start timer */
+ outb( IRCR1_TMR_EN, iobase+IRCR1);
+
+ new_ier |= IER_TMR_IE;
+ }
+ }
+ /* Timer finished */
+ if ( eir & EIR_TMR_EV) {
+ /* Disable timer */
+ switch_bank( iobase, BANK4);
+ outb( 0, iobase+IRCR1);
+
+ /* Clear timer event */
+ switch_bank(iobase, BANK0);
+ outb( ASCR_CTE, iobase+ASCR);
+
+ /* Check if this is a TX timer interrupt */
+ if ( idev->io.direction == IO_XMIT) {
+ pc87108_dma_write( idev, iobase);
+
+ /* Interrupt on DMA */
+ new_ier |= IER_DMA_IE;
+ } else {
+ /* Check if DMA has now finished */
+ pc87108_dma_receive_complete( idev, iobase);
+
+ new_ier |= IER_SFIF_IE;
+ }
+ }
+ /* Finished with transmission */
+ if ( eir & EIR_DMA_EV) {
+ pc87108_dma_xmit_complete( idev);
+
+ /* Check if there are more frames to be transmitted */
+ if ( irda_device_txqueue_empty( idev)) {
+ /* Prepare for receive */
+ pc87108_dma_receive( idev);
+
+ new_ier = IER_LS_IE|IER_SFIF_IE;
+ }
+ }
+ outb( bank, iobase+BSR);
+
+ return new_ier;
+}
+
+/*
+ * Function pc87108_interrupt (irq, dev_id, regs)
+ *
+ * An interrupt from the chip has arrived. Time to do some work
+ *
+ */
+static void pc87108_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ __u8 bsr, eir, ier;
+ int iobase;
+
+ struct irda_device *idev = (struct irda_device *) dev_id;
+
+ if (idev == NULL) {
+ printk( KERN_WARNING "%s: irq %d for unknown device.\n",
+ driver_name, irq);
+ return;
+ }
+
+ idev->netdev.interrupt = 1;
+
+ iobase = idev->io.iobase;
+
+ /* Save current bank */
+ bsr = inb( iobase+BSR);
+
+ switch_bank( iobase, BANK0);
+ ier = inb( iobase+IER);
+ eir = inb( iobase+EIR) & ier; /* Mask out the interesting ones */
+
+ outb( 0, iobase+IER); /* Disable interrupts */
+
+ if ( eir) {
+ /* Dispatch interrupt handler for the current speed */
+ if ( idev->io.baudrate > 115200)
+ ier = pc87108_fir_interrupt( idev, iobase, eir);
+ else
+ ier = pc87108_sir_interrupt( idev, eir);
+ }
+
+ outb( ier, iobase+IER); /* Restore interrupts */
+ outb( bsr, iobase+BSR); /* Restore bank register */
+
+ idev->netdev.interrupt = 0;
+}
+
+/*
+ * Function pc87108_wait_until_sent (idev)
+ *
+ * This function should put the current thread to sleep until all data
+ * have been sent, so it is safe to f.eks. change the speed.
+ */
+static void pc87108_wait_until_sent( struct irda_device *idev)
+{
+ /* Just delay 60 ms */
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(6);
+}
+
+/*
+ * Function pc87108_is_receiving (idev)
+ *
+ * Return TRUE is we are currently receiving a frame
+ *
+ */
+static int pc87108_is_receiving( struct irda_device *idev)
+{
+ int status = FALSE;
+ int iobase;
+ __u8 bank;
+
+ ASSERT( idev != NULL, return FALSE;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return FALSE;);
+
+ if ( idev->io.baudrate > 115200) {
+ iobase = idev->io.iobase;
+
+ /* Check if rx FIFO is not empty */
+ bank = inb( iobase+BSR);
+ switch_bank( iobase, BANK2);
+ if (( inb( iobase+RXFLV) & 0x3f) != 0) {
+ /* We are receiving something */
+ status = TRUE;
+ }
+ outb( bank, iobase+BSR);
+ } else
+ status = ( idev->rx_buff.state != OUTSIDE_FRAME);
+
+ return status;
+}
+
+/*
+ * Function pc87108_net_init (dev)
+ *
+ * Initialize network device
+ *
+ */
+static int pc87108_net_init( struct device *dev)
+{
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Setup to be a normal IrDA network device driver */
+ irda_device_setup( dev);
+
+ /* Insert overrides below this line! */
+
+ return 0;
+}
+
+
+/*
+ * Function pc87108_net_open (dev)
+ *
+ * Start the device
+ *
+ */
+static int pc87108_net_open( struct device *dev)
+{
+ struct irda_device *idev;
+ int iobase;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ ASSERT( dev != NULL, return -1;);
+ idev = (struct irda_device *) dev->priv;
+
+ ASSERT( idev != NULL, return 0;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;);
+
+ iobase = idev->io.iobase;
+
+ if (request_irq( idev->io.irq, pc87108_interrupt, 0, idev->name,
+ (void *) idev)) {
+ return -EAGAIN;
+ }
+ /*
+ * Always allocate the DMA channel after the IRQ,
+ * and clean up on failure.
+ */
+ if (request_dma(idev->io.dma, idev->name)) {
+ free_irq( idev->io.irq, idev);
+ return -EAGAIN;
+ }
+
+ /* Ready to play! */
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 1;
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* turn on interrupts */
+ switch_bank( iobase, BANK0);
+ outb( IER_LS_IE | IER_RXHDL_IE, iobase+IER);
+
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+/*
+ * Function pc87108_net_close (dev)
+ *
+ * Stop the device
+ *
+ */
+static int pc87108_net_close(struct device *dev)
+{
+ struct irda_device *idev;
+ int iobase;
+ __u8 bank;
+
+ DEBUG( 4, __FUNCTION__ "()\n");
+
+ /* Stop device */
+ dev->tbusy = 1;
+ dev->start = 0;
+
+ ASSERT( dev != NULL, return -1;);
+ idev = (struct irda_device *) dev->priv;
+
+ ASSERT( idev != NULL, return 0;);
+ ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;);
+
+ iobase = idev->io.iobase;
+
+ disable_dma( idev->io.dma);
+
+ /* Save current bank */
+ bank = inb( iobase+BSR);
+
+ /* Disable interrupts */
+ switch_bank( iobase, BANK0);
+ outb( 0, iobase+IER);
+
+ free_irq( idev->io.irq, idev);
+ free_dma( idev->io.dma);
+
+ /* Restore bank register */
+ outb( bank, iobase+BSR);
+
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+#ifdef MODULE
+
+/*
+ * Function init_module (void)
+ *
+ *
+ *
+ */
+int init_module(void)
+{
+ pc87108_init();
+
+ return(0);
+}
+
+/*
+ * Function cleanup_module (void)
+ *
+ *
+ *
+ */
+void cleanup_module(void)
+{
+ pc87108_cleanup();
+}
+
+#endif
+
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