patch-2.2.11 linux/drivers/net/hamradio/yam.c

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diff -u --recursive --new-file v2.2.10/linux/drivers/net/hamradio/yam.c linux/drivers/net/hamradio/yam.c
@@ -0,0 +1,1297 @@
+/*****************************************************************************/
+
+/*
+ *    yam.c  -- YAM radio modem driver.
+ *
+ *      Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
+ *      Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
+ *
+ *      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.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Please note that the GPL allows you to use the driver, NOT the radio.
+ *  In order to use the radio, you need a license from the communications
+ *  authority of your country.
+ *
+ *
+ *  History:
+ *   0.0 F1OAT 06.06.98  Begin of work with baycom.c source code V 0.3
+ *   0.1 F1OAT 07.06.98  Add timer polling routine for channel arbitration
+ *   0.2 F6FBB 08.06.98  Added delay after FPGA programming
+ *   0.3 F6FBB 29.07.98  Delayed PTT implementation for dupmode=2
+ *   0.4 F6FBB 30.07.98  Added TxTail, Slottime and Persistance
+ *   0.5 F6FBB 01.08.98  Shared IRQs, /proc/net and network statistics
+ *   0.6 F6FBB 25.08.98  Added 1200Bds format
+ *   0.7 F6FBB 12.09.98  Added to the kernel configuration
+ *   0.8 F6FBB 14.10.98  Fixed slottime/persistance timing bug
+ */
+
+/*****************************************************************************/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/net.h>
+#include <linux/in.h>
+#include <linux/if.h>
+#include <linux/malloc.h>
+#include <linux/errno.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+/* prototypes for ax25_encapsulate and ax25_rebuild_header */
+#include <net/ax25.h>
+#endif							/* CONFIG_AX25 || CONFIG_AX25_MODULE */
+
+/* make genksyms happy */
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <linux/tcp.h>
+
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+
+#include <linux/yam.h>
+#include "yam9600.h"
+#include "yam1200.h"
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * currently this module is supposed to support both module styles, i.e.
+ * the old one present up to about 2.1.9, and the new one functioning
+ * starting with 2.1.21. The reason is I have a kit allowing to compile
+ * this module also under 2.0.x which was requested by several people.
+ * This will go in 2.2
+ */
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= 0x20100
+#include <asm/uaccess.h>
+#else
+#include <asm/segment.h>
+#include <linux/mm.h>
+
+#undef put_user
+#undef get_user
+
+#define put_user(x,ptr) ({ __put_user((unsigned long)(x),(ptr),sizeof(*(ptr))); 0; })
+#define get_user(x,ptr) ({ x = ((__typeof__(*(ptr)))__get_user((ptr),sizeof(*(ptr)))); 0; })
+
+extern inline int copy_from_user(void *to, const void *from, unsigned long n)
+{
+	int i = verify_area(VERIFY_READ, from, n);
+	if (i)
+		return i;
+	memcpy_fromfs(to, from, n);
+	return 0;
+}
+
+extern inline int copy_to_user(void *to, const void *from, unsigned long n)
+{
+	int i = verify_area(VERIFY_WRITE, to, n);
+	if (i)
+		return i;
+	memcpy_tofs(to, from, n);
+	return 0;
+}
+#endif
+
+#if LINUX_VERSION_CODE < 0x20115
+extern __inline__ void dev_init_buffers(struct device *dev)
+{
+	int i;
+	for (i = 0; i < DEV_NUMBUFFS; i++) {
+		skb_queue_head_init(&dev->buffs[i]);
+	}
+}
+#endif
+
+#if LINUX_VERSION_CODE >= 0x20123
+#include <linux/init.h>
+#else
+#define __init
+#define __initdata
+#define __initfunc(x) x
+#endif
+
+/* --------------------------------------------------------------------- */
+
+static const char yam_drvname[] = "yam";
+static const char yam_drvinfo[] = KERN_INFO "YAM driver version 0.8 by F1OAT/F6FBB\n";
+
+/* --------------------------------------------------------------------- */
+
+#define YAM_9600	1
+#define YAM_1200	2
+
+#define NR_PORTS 	4
+#define YAM_MAGIC	0xF10A7654
+
+/* Transmitter states */
+
+#define TX_OFF  	0
+#define TX_HEAD		1
+#define TX_DATA  	2
+#define TX_CRC1  	3
+#define TX_CRC2  	4
+#define TX_TAIL  	5
+
+#define YAM_MAX_FRAME	1024
+
+#define DEFAULT_BITRATE	9600	/* bps */
+#define DEFAULT_HOLDD   10		/* sec */
+#define DEFAULT_TXD	    300		/* ms */
+#define DEFAULT_TXTAIL  10		/* ms */
+#define DEFAULT_SLOT    100		/* ms */
+#define DEFAULT_PERS    64		/* 0->255 */
+
+struct yam_port {
+	int magic;
+	int bitrate;
+	int baudrate;
+	int iobase;
+	int irq;
+	int dupmode;
+	char name[16];
+
+	struct device dev;
+
+	/* Stats section */
+
+#if LINUX_VERSION_CODE < 0x20119
+	struct enet_statistics stats;
+#else
+	struct net_device_stats stats;
+#endif
+	int nb_rxint;
+	int nb_mdint;
+
+	/* Parameters section */
+
+	int txd;					/* tx delay */
+	int holdd;					/* duplex ptt delay */
+	int txtail;					/* txtail delay */
+	int slot;					/* slottime */
+	int pers;					/* persistence */
+
+	/* Tx section */
+
+	int tx_state;
+	int tx_count;
+	int slotcnt;
+	unsigned char tx_buf[YAM_MAX_FRAME];
+	int tx_len;
+	int tx_crcl, tx_crch;
+	struct sk_buff_head send_queue;		/* Packets awaiting transmission */
+
+	/* Rx section */
+
+	int dcd;
+	unsigned char rx_buf[YAM_MAX_FRAME];
+	int rx_len;
+	int rx_crcl, rx_crch;
+};
+
+struct yam_mcs {
+	unsigned char bits[YAM_FPGA_SIZE];
+	int bitrate;
+	struct yam_mcs *next;
+};
+
+static struct yam_port yam_ports[NR_PORTS];
+
+static struct yam_mcs *yam_data = NULL;
+
+static unsigned irqs[16];
+
+static char ax25_bcast[7] =
+{'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1};
+static char ax25_test[7] =
+{'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1};
+
+static struct timer_list yam_timer;
+
+/* --------------------------------------------------------------------- */
+
+#define RBR(iobase) (iobase+0)
+#define THR(iobase) (iobase+0)
+#define IER(iobase) (iobase+1)
+#define IIR(iobase) (iobase+2)
+#define FCR(iobase) (iobase+2)
+#define LCR(iobase) (iobase+3)
+#define MCR(iobase) (iobase+4)
+#define LSR(iobase) (iobase+5)
+#define MSR(iobase) (iobase+6)
+#define SCR(iobase) (iobase+7)
+#define DLL(iobase) (iobase+0)
+#define DLM(iobase) (iobase+1)
+
+#define YAM_EXTENT 8
+
+/* Interrupt Identification Register Bit Masks */
+#define IIR_NOPEND 	1
+#define IIR_MSR  	0
+#define IIR_TX     	2
+#define IIR_RX     	4
+#define IIR_LSR   	6
+#define IIR_TIMEOUT	12			/* Fifo mode only */
+
+#define IIR_MASK	0x0F
+
+/* Interrupt Enable Register Bit Masks */
+#define IER_RX  1				/* enable rx interrupt */
+#define IER_TX  2				/* enable tx interrupt */
+#define IER_LSR 4				/* enable line status interrupts */
+#define IER_MSR 8				/* enable modem status interrupts */
+
+/* Modem Control Register Bit Masks */
+#define MCR_DTR  0x01			/* DTR output */
+#define MCR_RTS  0x02			/* RTS output */
+#define MCR_OUT1 0x04			/* OUT1 output (not accessible in RS232) */
+#define MCR_OUT2 0x08			/* Master Interrupt enable (must be set on PCs) */
+#define MCR_LOOP 0x10			/* Loopback enable */
+
+/* Modem Status Register Bit Masks */
+#define MSR_DCTS 0x01			/* Delta CTS input */
+#define MSR_DDSR 0x02			/* Delta DSR */
+#define MSR_DRIN 0x04			/* Delta RI */
+#define MSR_DDCD 0x08			/* Delta DCD */
+#define MSR_CTS  0x10			/* CTS input */
+#define MSR_DSR  0x20			/* DSR input */
+#define MSR_RING 0x40			/* RI  input */
+#define MSR_DCD  0x80			/* DCD input */
+
+/* line status register bit mask */
+#define LSR_RXC	   0x01
+#define LSR_OE	   0x02
+#define LSR_PE	   0x04
+#define LSR_FE	   0x08
+#define LSR_BREAK  0x10
+#define LSR_THRE   0x20
+#define LSR_TSRE   0x40
+
+/* Line Control Register Bit Masks */
+#define LCR_DLAB    0x80
+#define LCR_BREAK   0x40
+#define LCR_PZERO   0x28
+#define LCR_PEVEN   0x18
+#define LCR_PODD    0x08
+#define LCR_STOP1   0x00
+#define LCR_STOP2   0x04
+#define LCR_BIT5    0x00
+#define LCR_BIT6    0x02
+#define LCR_BIT7    0x01
+#define LCR_BIT8    0x03
+
+/* YAM Modem <-> UART Port mapping */
+
+#define TX_RDY 	  MSR_DCTS		/* transmitter ready to send */
+#define RX_DCD    MSR_DCD		/* carrier detect */
+#define RX_FLAG   MSR_RING		/* hdlc flag received */
+#define FPGA_DONE MSR_DSR		/* FPGA is configured */
+#define PTT_ON    (MCR_RTS|MCR_OUT2)	/* activate PTT */
+#define PTT_OFF   (MCR_DTR|MCR_OUT2)	/* release PTT */
+
+#define ENABLE_RXINT   IER_RX	/* enable uart rx interrupt during rx */
+#define ENABLE_TXINT   IER_MSR	/* enable uart ms interrupt during tx */
+#define ENABLE_RTXINT  (IER_RX|IER_MSR)		/* full duplex operations */
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+
+/*************************************************************************
+* CRC Tables
+************************************************************************/
+
+static const unsigned char chktabl[256] =
+{0x00, 0x89, 0x12, 0x9b, 0x24, 0xad, 0x36, 0xbf, 0x48, 0xc1, 0x5a, 0xd3, 0x6c, 0xe5, 0x7e,
+ 0xf7, 0x81, 0x08, 0x93, 0x1a, 0xa5, 0x2c, 0xb7, 0x3e, 0xc9, 0x40, 0xdb, 0x52, 0xed, 0x64,
+ 0xff, 0x76, 0x02, 0x8b, 0x10, 0x99, 0x26, 0xaf, 0x34, 0xbd, 0x4a, 0xc3, 0x58, 0xd1, 0x6e,
+ 0xe7, 0x7c, 0xf5, 0x83, 0x0a, 0x91, 0x18, 0xa7, 0x2e, 0xb5, 0x3c, 0xcb, 0x42, 0xd9, 0x50,
+ 0xef, 0x66, 0xfd, 0x74, 0x04, 0x8d, 0x16, 0x9f, 0x20, 0xa9, 0x32, 0xbb, 0x4c, 0xc5, 0x5e,
+ 0xd7, 0x68, 0xe1, 0x7a, 0xf3, 0x85, 0x0c, 0x97, 0x1e, 0xa1, 0x28, 0xb3, 0x3a, 0xcd, 0x44,
+ 0xdf, 0x56, 0xe9, 0x60, 0xfb, 0x72, 0x06, 0x8f, 0x14, 0x9d, 0x22, 0xab, 0x30, 0xb9, 0x4e,
+ 0xc7, 0x5c, 0xd5, 0x6a, 0xe3, 0x78, 0xf1, 0x87, 0x0e, 0x95, 0x1c, 0xa3, 0x2a, 0xb1, 0x38,
+ 0xcf, 0x46, 0xdd, 0x54, 0xeb, 0x62, 0xf9, 0x70, 0x08, 0x81, 0x1a, 0x93, 0x2c, 0xa5, 0x3e,
+ 0xb7, 0x40, 0xc9, 0x52, 0xdb, 0x64, 0xed, 0x76, 0xff, 0x89, 0x00, 0x9b, 0x12, 0xad, 0x24,
+ 0xbf, 0x36, 0xc1, 0x48, 0xd3, 0x5a, 0xe5, 0x6c, 0xf7, 0x7e, 0x0a, 0x83, 0x18, 0x91, 0x2e,
+ 0xa7, 0x3c, 0xb5, 0x42, 0xcb, 0x50, 0xd9, 0x66, 0xef, 0x74, 0xfd, 0x8b, 0x02, 0x99, 0x10,
+ 0xaf, 0x26, 0xbd, 0x34, 0xc3, 0x4a, 0xd1, 0x58, 0xe7, 0x6e, 0xf5, 0x7c, 0x0c, 0x85, 0x1e,
+ 0x97, 0x28, 0xa1, 0x3a, 0xb3, 0x44, 0xcd, 0x56, 0xdf, 0x60, 0xe9, 0x72, 0xfb, 0x8d, 0x04,
+ 0x9f, 0x16, 0xa9, 0x20, 0xbb, 0x32, 0xc5, 0x4c, 0xd7, 0x5e, 0xe1, 0x68, 0xf3, 0x7a, 0x0e,
+ 0x87, 0x1c, 0x95, 0x2a, 0xa3, 0x38, 0xb1, 0x46, 0xcf, 0x54, 0xdd, 0x62, 0xeb, 0x70, 0xf9,
+ 0x8f, 0x06, 0x9d, 0x14, 0xab, 0x22, 0xb9, 0x30, 0xc7, 0x4e, 0xd5, 0x5c, 0xe3, 0x6a, 0xf1,
+ 0x78};
+static const unsigned char chktabh[256] =
+{0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8c, 0x9d, 0xaf, 0xbe, 0xca, 0xdb, 0xe9,
+ 0xf8, 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9c, 0x8d, 0xbf, 0xae, 0xda, 0xcb,
+ 0xf9, 0xe8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xad, 0xbc, 0x8e, 0x9f, 0xeb,
+ 0xfa, 0xc8, 0xd9, 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xbd, 0xac, 0x9e, 0x8f,
+ 0xfb, 0xea, 0xd8, 0xc9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xce, 0xdf, 0xed,
+ 0xfc, 0x88, 0x99, 0xab, 0xba, 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xde, 0xcf,
+ 0xfd, 0xec, 0x98, 0x89, 0xbb, 0xaa, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xef,
+ 0xfe, 0xcc, 0xdd, 0xa9, 0xb8, 0x8a, 0x9b, 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07,
+ 0xff, 0xee, 0xdc, 0xcd, 0xb9, 0xa8, 0x9a, 0x8b, 0x84, 0x95, 0xa7, 0xb6, 0xc2, 0xd3, 0xe1,
+ 0xf0, 0x08, 0x19, 0x2b, 0x3a, 0x4e, 0x5f, 0x6d, 0x7c, 0x94, 0x85, 0xb7, 0xa6, 0xd2, 0xc3,
+ 0xf1, 0xe0, 0x18, 0x09, 0x3b, 0x2a, 0x5e, 0x4f, 0x7d, 0x6c, 0xa5, 0xb4, 0x86, 0x97, 0xe3,
+ 0xf2, 0xc0, 0xd1, 0x29, 0x38, 0x0a, 0x1b, 0x6f, 0x7e, 0x4c, 0x5d, 0xb5, 0xa4, 0x96, 0x87,
+ 0xf3, 0xe2, 0xd0, 0xc1, 0x39, 0x28, 0x1a, 0x0b, 0x7f, 0x6e, 0x5c, 0x4d, 0xc6, 0xd7, 0xe5,
+ 0xf4, 0x80, 0x91, 0xa3, 0xb2, 0x4a, 0x5b, 0x69, 0x78, 0x0c, 0x1d, 0x2f, 0x3e, 0xd6, 0xc7,
+ 0xf5, 0xe4, 0x90, 0x81, 0xb3, 0xa2, 0x5a, 0x4b, 0x79, 0x68, 0x1c, 0x0d, 0x3f, 0x2e, 0xe7,
+ 0xf6, 0xc4, 0xd5, 0xa1, 0xb0, 0x82, 0x93, 0x6b, 0x7a, 0x48, 0x59, 0x2d, 0x3c, 0x0e, 0x1f,
+ 0xf7, 0xe6, 0xd4, 0xc5, 0xb1, 0xa0, 0x92, 0x83, 0x7b, 0x6a, 0x58, 0x49, 0x3d, 0x2c, 0x1e,
+ 0x0f};
+
+/*************************************************************************
+* FPGA functions
+************************************************************************/
+
+static void delay(int ms)
+{
+	unsigned long timeout = jiffies + ((ms * HZ) / 1000);
+	while (jiffies < timeout);
+}
+
+/*
+ * reset FPGA
+ */
+
+static void fpga_reset(int iobase)
+{
+	outb(0, IER(iobase));
+	outb(LCR_DLAB | LCR_BIT5, LCR(iobase));
+	outb(1, DLL(iobase));
+	outb(0, DLM(iobase));
+
+	outb(LCR_BIT5, LCR(iobase));
+	inb(LSR(iobase));
+	inb(MSR(iobase));
+	/* turn off FPGA supply voltage */
+	outb(MCR_OUT1 | MCR_OUT2, MCR(iobase));
+	delay(100);
+	/* turn on FPGA supply voltage again */
+	outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase));
+	delay(100);
+}
+
+/*
+ * send one byte to FPGA
+ */
+
+static int fpga_write(int iobase, unsigned char wrd)
+{
+	unsigned char bit;
+	int k;
+	unsigned long timeout = jiffies + HZ / 10;
+
+	for (k = 0; k < 8; k++) {
+		bit = (wrd & 0x80) ? (MCR_RTS | MCR_DTR) : MCR_DTR;
+		outb(bit | MCR_OUT1 | MCR_OUT2, MCR(iobase));
+		wrd <<= 1;
+		outb(0xfc, THR(iobase));
+		while ((inb(LSR(iobase)) & LSR_TSRE) == 0)
+			if (jiffies > timeout)
+				return -1;
+	}
+
+	return 0;
+}
+
+#ifdef MODULE
+static void free_mcs(void)
+{
+	struct yam_mcs *p;
+
+	while (yam_data) {
+		p = yam_data;
+		yam_data = yam_data->next;
+		kfree(p);
+	}
+}
+#endif
+
+static unsigned char *
+ add_mcs(unsigned char *bits, int bitrate)
+{
+	struct yam_mcs *p;
+
+	/* If it already exists, replace the bit data */
+	p = yam_data;
+	while (p) {
+		if (p->bitrate == bitrate) {
+			memcpy(p->bits, bits, YAM_FPGA_SIZE);
+			return p->bits;
+		}
+		p = p->next;
+	}
+
+	/* Allocate a new mcs */
+	p = kmalloc(sizeof(struct yam_mcs), GFP_ATOMIC);
+	if (p == NULL) {
+		printk(KERN_WARNING "YAM: no memory to allocate mcs\n");
+		return NULL;
+	}
+	memcpy(p->bits, bits, YAM_FPGA_SIZE);
+	p->bitrate = bitrate;
+	p->next = yam_data;
+	yam_data = p;
+
+	return p->bits;
+}
+
+static unsigned char *get_mcs(int bitrate)
+{
+	struct yam_mcs *p;
+
+	p = yam_data;
+	while (p) {
+		if (p->bitrate == bitrate)
+			return p->bits;
+		p = p->next;
+	}
+
+	/* Load predefined mcs data */
+	switch (bitrate) {
+	case 1200:
+		return add_mcs(bits_1200, bitrate);
+	default:
+		return add_mcs(bits_9600, bitrate);
+	}
+}
+
+/*
+ * download bitstream to FPGA
+ * data is contained in bits[] array in fpgaconf.h
+ */
+
+static int fpga_download(int iobase, int bitrate)
+{
+	int i, rc;
+	unsigned char *pbits;
+
+	pbits = get_mcs(bitrate);
+	if (pbits == NULL)
+		return -1;
+
+	fpga_reset(iobase);
+	for (i = 0; i < YAM_FPGA_SIZE; i++) {
+		if (fpga_write(iobase, pbits[i])) {
+			printk("yam: error in write cycle\n");
+			return -1;			/* write... */
+		}
+	}
+
+	fpga_write(iobase, 0xFF);
+	rc = inb(MSR(iobase));		/* check DONE signal */
+
+	/* Needed for some hardwares */
+	delay(50);
+
+	return (rc & MSR_DSR) ? 0 : -1;
+}
+
+
+/************************************************************************
+* Serial port init 
+************************************************************************/
+
+static void yam_set_uart(struct device *dev)
+{
+	struct yam_port *yp = (struct yam_port *) dev->priv;
+	int divisor = 115200 / yp->baudrate;
+
+	outb(0, IER(dev->base_addr));
+	outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr));
+	outb(divisor, DLL(dev->base_addr));
+	outb(0, DLM(dev->base_addr));
+	outb(LCR_BIT8, LCR(dev->base_addr));
+	outb(PTT_OFF, MCR(dev->base_addr));
+	outb(0x00, FCR(dev->base_addr));
+
+	/* Flush pending irq */
+
+	inb(RBR(dev->base_addr));
+	inb(MSR(dev->base_addr));
+
+	/* Enable rx irq */
+
+	outb(ENABLE_RTXINT, IER(dev->base_addr));
+}
+
+
+/* --------------------------------------------------------------------- */
+
+enum uart {
+	c_uart_unknown, c_uart_8250,
+	c_uart_16450, c_uart_16550, c_uart_16550A
+};
+
+static const char *uart_str[] =
+{"unknown", "8250", "16450", "16550", "16550A"};
+
+static enum uart yam_check_uart(unsigned int iobase)
+{
+	unsigned char b1, b2, b3;
+	enum uart u;
+	enum uart uart_tab[] =
+	{c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A};
+
+	b1 = inb(MCR(iobase));
+	outb(b1 | 0x10, MCR(iobase));	/* loopback mode */
+	b2 = inb(MSR(iobase));
+	outb(0x1a, MCR(iobase));
+	b3 = inb(MSR(iobase)) & 0xf0;
+	outb(b1, MCR(iobase));		/* restore old values */
+	outb(b2, MSR(iobase));
+	if (b3 != 0x90)
+		return c_uart_unknown;
+	inb(RBR(iobase));
+	inb(RBR(iobase));
+	outb(0x01, FCR(iobase));	/* enable FIFOs */
+	u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
+	if (u == c_uart_16450) {
+		outb(0x5a, SCR(iobase));
+		b1 = inb(SCR(iobase));
+		outb(0xa5, SCR(iobase));
+		b2 = inb(SCR(iobase));
+		if ((b1 != 0x5a) || (b2 != 0xa5))
+			u = c_uart_8250;
+	}
+	return u;
+}
+
+/******************************************************************************
+* Rx Section
+******************************************************************************/
+static void inline
+ yam_rx_flag(struct device *dev, struct yam_port *yp)
+{
+	if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) {
+		int pkt_len = yp->rx_len - 2 + 1;	/* -CRC + kiss */
+		struct sk_buff *skb;
+
+		if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
+			/* Bad crc */
+		} else {
+			if (!(skb = dev_alloc_skb(pkt_len))) {
+				printk("%s: memory squeeze, dropping packet\n", dev->name);
+				++yp->stats.rx_dropped;
+			} else {
+				unsigned char *cp;
+				skb->dev = dev;
+				cp = skb_put(skb, pkt_len);
+				*cp++ = 0;		/* KISS kludge */
+				memcpy(cp, yp->rx_buf, pkt_len - 1);
+				skb->protocol = htons(ETH_P_AX25);
+				skb->mac.raw = skb->data;
+				netif_rx(skb);
+				++yp->stats.rx_packets;
+			}
+		}
+	}
+	yp->rx_len = 0;
+	yp->rx_crcl = 0x21;
+	yp->rx_crch = 0xf3;
+}
+
+static void inline
+ yam_rx_byte(struct device *dev, struct yam_port *yp, unsigned char rxb)
+{
+	if (yp->rx_len < YAM_MAX_FRAME) {
+		unsigned char c = yp->rx_crcl;
+		yp->rx_crcl = (chktabl[c] ^ yp->rx_crch);
+		yp->rx_crch = (chktabh[c] ^ rxb);
+		yp->rx_buf[yp->rx_len++] = rxb;
+	}
+}
+
+/********************************************************************************
+* TX Section
+********************************************************************************/
+
+static void ptt_on(struct device *dev)
+{
+	outb(PTT_ON, MCR(dev->base_addr));
+}
+
+static void ptt_off(struct device *dev)
+{
+	outb(PTT_OFF, MCR(dev->base_addr));
+}
+
+static int yam_send_packet(struct sk_buff *skb, struct device *dev)
+{
+	struct yam_port *yp = dev->priv;
+
+	if (skb == NULL) {
+		return 0;
+	}
+	skb_queue_tail(&yp->send_queue, skb);
+	dev->trans_start = jiffies;
+	return 0;
+}
+
+static void yam_start_tx(struct device *dev, struct yam_port *yp)
+{
+	if ((yp->tx_state == TX_TAIL) || (yp->txd == 0))
+		yp->tx_count = 1;
+	else
+		yp->tx_count = (yp->bitrate * yp->txd) / 8000;
+	yp->tx_state = TX_HEAD;
+	ptt_on(dev);
+}
+
+static unsigned short random_seed;
+
+static inline unsigned short random_num(void)
+{
+	random_seed = 28629 * random_seed + 157;
+	return random_seed;
+}
+
+static void yam_arbitrate(struct device *dev)
+{
+	struct yam_port *yp = dev->priv;
+
+	if (!yp || yp->magic != YAM_MAGIC
+		|| yp->tx_state != TX_OFF || skb_queue_empty(&yp->send_queue)) {
+		return;
+	}
+	/* tx_state is TX_OFF and there is data to send */
+
+	if (yp->dupmode) {
+		/* Full duplex mode, don't wait */
+		yam_start_tx(dev, yp);
+		return;
+	}
+	if (yp->dcd) {
+		/* DCD on, wait slotime ... */
+		yp->slotcnt = yp->slot / 10;
+		return;
+	}
+	/* Is slottime passed ? */
+	if ((--yp->slotcnt) > 0)
+		return;
+
+	yp->slotcnt = yp->slot / 10;
+
+	/* is random > persist ? */
+	if ((random_num() % 256) > yp->pers)
+		return;
+
+	yam_start_tx(dev, yp);
+}
+
+static void yam_dotimer(unsigned long dummy)
+{
+	int i;
+
+	for (i = 0; i < NR_PORTS; i++) {
+		struct device *dev = &yam_ports[i].dev;
+		if (dev->start)
+			yam_arbitrate(dev);
+	}
+	yam_timer.expires = jiffies + HZ / 100;
+	add_timer(&yam_timer);
+}
+
+static void yam_tx_byte(struct device *dev, struct yam_port *yp)
+{
+	struct sk_buff *skb;
+	unsigned char b, temp;
+
+	switch (yp->tx_state) {
+	case TX_OFF:
+		break;
+	case TX_HEAD:
+		if (--yp->tx_count <= 0) {
+			if (!(skb = skb_dequeue(&yp->send_queue))) {
+				ptt_off(dev);
+				yp->tx_state = TX_OFF;
+				break;
+			}
+			yp->tx_state = TX_DATA;
+			if (skb->data[0] != 0) {
+/*                              do_kiss_params(s, skb->data, skb->len); */
+				dev_kfree_skb(skb);
+				break;
+			}
+			yp->tx_len = skb->len - 1;	/* strip KISS byte */
+			if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) {
+				dev_kfree_skb(skb);
+				break;
+			}
+			memcpy(yp->tx_buf, skb->data + 1, yp->tx_len);
+			dev_kfree_skb(skb);
+			yp->tx_count = 0;
+			yp->tx_crcl = 0x21;
+			yp->tx_crch = 0xf3;
+			yp->tx_state = TX_DATA;
+		}
+		break;
+	case TX_DATA:
+		b = yp->tx_buf[yp->tx_count++];
+		outb(b, THR(dev->base_addr));
+		temp = yp->tx_crcl;
+		yp->tx_crcl = chktabl[temp] ^ yp->tx_crch;
+		yp->tx_crch = chktabh[temp] ^ b;
+		if (yp->tx_count >= yp->tx_len) {
+			yp->tx_state = TX_CRC1;
+		}
+		break;
+	case TX_CRC1:
+		yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch;
+		yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff;
+		outb(yp->tx_crcl, THR(dev->base_addr));
+		yp->tx_state = TX_CRC2;
+		break;
+	case TX_CRC2:
+		outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr));
+		if (skb_queue_empty(&yp->send_queue)) {
+			yp->tx_count = (yp->bitrate * yp->txtail) / 8000;
+			if (yp->dupmode == 2)
+				yp->tx_count += (yp->bitrate * yp->holdd) / 8;
+			if (yp->tx_count == 0)
+				yp->tx_count = 1;
+			yp->tx_state = TX_TAIL;
+		} else {
+			yp->tx_count = 1;
+			yp->tx_state = TX_HEAD;
+		}
+		++yp->stats.tx_packets;
+		break;
+	case TX_TAIL:
+		if (--yp->tx_count <= 0) {
+			yp->tx_state = TX_OFF;
+			ptt_off(dev);
+		}
+		break;
+	}
+}
+
+/***********************************************************************************
+* ISR routine
+************************************************************************************/
+
+static void yam_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct device *dev;
+	struct yam_port *yp;
+	unsigned char iir;
+	int counter = 100;
+	int i;
+
+	sti();
+
+	for (i = 0; i < NR_PORTS; i++) {
+		yp = &yam_ports[i];
+		dev = &yp->dev;
+
+		if (!dev->start)
+			continue;
+
+		while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) {
+			unsigned char msr = inb(MSR(dev->base_addr));
+			unsigned char lsr = inb(LSR(dev->base_addr));
+			unsigned char rxb;
+
+			if (lsr & LSR_OE)
+				++yp->stats.rx_fifo_errors;
+
+			yp->dcd = (msr & RX_DCD) ? 1 : 0;
+
+			if (--counter <= 0) {
+				printk("%s: too many irq iir=%d\n", dev->name, iir);
+				return;
+			}
+			if (msr & TX_RDY) {
+				++yp->nb_mdint;
+				yam_tx_byte(dev, yp);
+			}
+			if (lsr & LSR_RXC) {
+				++yp->nb_rxint;
+				rxb = inb(RBR(dev->base_addr));
+				if (msr & RX_FLAG)
+					yam_rx_flag(dev, yp);
+				else
+					yam_rx_byte(dev, yp, rxb);
+			}
+		}
+	}
+}
+
+static int yam_net_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
+{
+	int len = 0;
+	int i;
+	off_t pos = 0;
+	off_t begin = 0;
+
+	cli();
+
+	for (i = 0; i < NR_PORTS; i++) {
+		if (yam_ports[i].iobase == 0 || yam_ports[i].irq == 0)
+			continue;
+		len += sprintf(buffer + len, "Device %s\n", yam_ports[i].name);
+		len += sprintf(buffer + len, "  Up       %d\n", yam_ports[i].dev.start);
+		len += sprintf(buffer + len, "  Speed    %u\n", yam_ports[i].bitrate);
+		len += sprintf(buffer + len, "  IoBase   0x%x\n", yam_ports[i].iobase);
+		len += sprintf(buffer + len, "  BaudRate %u\n", yam_ports[i].baudrate);
+		len += sprintf(buffer + len, "  IRQ      %u\n", yam_ports[i].irq);
+		len += sprintf(buffer + len, "  TxState  %u\n", yam_ports[i].tx_state);
+		len += sprintf(buffer + len, "  Duplex   %u\n", yam_ports[i].dupmode);
+		len += sprintf(buffer + len, "  HoldDly  %u\n", yam_ports[i].holdd);
+		len += sprintf(buffer + len, "  TxDelay  %u\n", yam_ports[i].txd);
+		len += sprintf(buffer + len, "  TxTail   %u\n", yam_ports[i].txtail);
+		len += sprintf(buffer + len, "  SlotTime %u\n", yam_ports[i].slot);
+		len += sprintf(buffer + len, "  Persist  %u\n", yam_ports[i].pers);
+		len += sprintf(buffer + len, "  TxFrames %lu\n", yam_ports[i].stats.tx_packets);
+		len += sprintf(buffer + len, "  RxFrames %lu\n", yam_ports[i].stats.rx_packets);
+		len += sprintf(buffer + len, "  TxInt    %u\n", yam_ports[i].nb_mdint);
+		len += sprintf(buffer + len, "  RxInt    %u\n", yam_ports[i].nb_rxint);
+		len += sprintf(buffer + len, "  RxOver   %lu\n", yam_ports[i].stats.rx_fifo_errors);
+		len += sprintf(buffer + len, "\n");
+
+		pos = begin + len;
+
+		if (pos < offset) {
+			len = 0;
+			begin = pos;
+		}
+		if (pos > offset + length)
+			break;
+	}
+
+	sti();
+
+	*start = buffer + (offset - begin);
+	len -= (offset - begin);
+
+	if (len > length)
+		len = length;
+
+	return len;
+}
+
+#ifdef CONFIG_INET
+#ifndef PROC_NET_YAM
+#define PROC_NET_YAM (PROC_NET_LAST+10)		/* Sorry again... */
+#endif
+
+struct proc_dir_entry yam_proc_dir_entry =
+{
+	PROC_NET_YAM, 3, "yam", S_IFREG | S_IRUGO, 1, 0, 0, 0,
+	&proc_net_inode_operations, yam_net_get_info
+};
+
+#define yam_net_procfs_init()   proc_net_register(&yam_proc_dir_entry);
+#define yam_net_procfs_remove() proc_net_unregister(PROC_NET_YAM);
+#else
+#define yam_net_procfs_init()
+#define yam_net_procfs_remove()
+#endif
+
+/* --------------------------------------------------------------------- */
+
+#if LINUX_VERSION_CODE >= 0x20119
+static struct net_device_stats *
+ yam_get_stats(struct device *dev)
+#else
+static struct enet_statistics *
+ yam_get_stats(struct device *dev)
+#endif
+{
+	struct yam_port *yp;
+
+	if (!dev || !dev->priv)
+		return NULL;
+
+	yp = (struct yam_port *) dev->priv;
+	if (yp->magic != YAM_MAGIC)
+		return NULL;
+
+	/* 
+	 * Get the current statistics.  This may be called with the
+	 * card open or closed. 
+	 */
+	return &yp->stats;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int yam_open(struct device *dev)
+{
+	struct yam_port *yp = (struct yam_port *) dev->priv;
+	enum uart u;
+	int i;
+
+	printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
+
+	if (!dev || !yp || !yp->bitrate)
+		return -ENXIO;
+	if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
+		dev->irq < 2 || dev->irq > 15) {
+		return -ENXIO;
+	}
+	if (check_region(dev->base_addr, YAM_EXTENT)) {
+		printk("%s: cannot 0x%lx busy\n", dev->name, dev->base_addr);
+		return -EACCES;
+	}
+	if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) {
+		printk("%s: cannot find uart type\n", dev->name);
+		return -EIO;
+	}
+	if (fpga_download(dev->base_addr, yp->bitrate)) {
+		printk("%s: cannot init FPGA\n", dev->name);
+		return -EIO;
+	}
+	outb(0, IER(dev->base_addr));
+	if (request_irq(dev->irq, yam_interrupt, SA_INTERRUPT | SA_SHIRQ, dev->name, NULL)) {
+		printk("%s: irq %d busy\n", dev->name, dev->irq);
+		return -EBUSY;
+	}
+	request_region(dev->base_addr, YAM_EXTENT, dev->name);
+
+	yam_set_uart(dev);
+	dev->start = 1;
+	yp->slotcnt = yp->slot / 10;
+
+	/* Reset overruns for all ports - FPGA programming makes overruns */
+	for (i = 0; i < NR_PORTS; i++) {
+		inb(LSR(yam_ports[i].dev.base_addr));
+		yam_ports[i].stats.rx_fifo_errors = 0;
+	}
+
+	printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq,
+		   uart_str[u]);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int yam_close(struct device *dev)
+{
+	struct sk_buff *skb;
+	struct yam_port *yp = (struct yam_port *) dev->priv;
+
+	if (!dev || !yp)
+		return -EINVAL;
+	/*
+	 * disable interrupts
+	 */
+	outb(0, IER(dev->base_addr));
+	outb(1, MCR(dev->base_addr));
+	/* Remove IRQ handler if last */
+	free_irq(dev->irq, NULL);
+	release_region(dev->base_addr, YAM_EXTENT);
+	dev->start = 0;
+	dev->tbusy = 1;
+	while ((skb = skb_dequeue(&yp->send_queue)))
+		dev_kfree_skb(skb);
+
+	printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n",
+		   yam_drvname, dev->base_addr, dev->irq);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int yam_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
+{
+	struct yam_port *yp = (struct yam_port *) dev->priv;
+	struct yamdrv_ioctl_cfg yi;
+	struct yamdrv_ioctl_mcs *ym;
+	int ioctl_cmd;
+
+	if (copy_from_user(&ioctl_cmd, ifr->ifr_data, sizeof(int)))
+		 return -EFAULT;
+
+	if (yp == NULL || yp->magic != YAM_MAGIC)
+		return -EINVAL;
+
+	if (!suser())
+		return -EPERM;
+
+	if (cmd != SIOCDEVPRIVATE)
+		return -EINVAL;
+
+	switch (ioctl_cmd) {
+
+	case SIOCYAMRESERVED:
+		return -EINVAL;			/* unused */
+
+	case SIOCYAMSMCS:
+		if (dev->start)
+			return -EINVAL;		/* Cannot change this parameter when up */
+		ym = kmalloc(sizeof(struct yamdrv_ioctl_mcs), GFP_ATOMIC);
+		ym->bitrate = 9600;
+		if (copy_from_user(ym, ifr->ifr_data, sizeof(struct yamdrv_ioctl_mcs)))
+			 return -EFAULT;
+		if (ym->bitrate > YAM_MAXBITRATE)
+			return -EINVAL;
+		add_mcs(ym->bits, ym->bitrate);
+		kfree(ym);
+		break;
+
+	case SIOCYAMSCFG:
+		if (copy_from_user(&yi, ifr->ifr_data, sizeof(struct yamdrv_ioctl_cfg)))
+			 return -EFAULT;
+
+		if ((yi.cfg.mask & YAM_IOBASE) && dev->start)
+			return -EINVAL;		/* Cannot change this parameter when up */
+		if ((yi.cfg.mask & YAM_IRQ) && dev->start)
+			return -EINVAL;		/* Cannot change this parameter when up */
+		if ((yi.cfg.mask & YAM_BITRATE) && dev->start)
+			return -EINVAL;		/* Cannot change this parameter when up */
+		if ((yi.cfg.mask & YAM_BAUDRATE) && dev->start)
+			return -EINVAL;		/* Cannot change this parameter when up */
+
+		if (yi.cfg.mask & YAM_IOBASE) {
+			yp->iobase = yi.cfg.iobase;
+			dev->base_addr = yi.cfg.iobase;
+		}
+		if (yi.cfg.mask & YAM_IRQ) {
+			if (yi.cfg.irq > 15)
+				return -EINVAL;
+			yp->irq = yi.cfg.irq;
+			dev->irq = yi.cfg.irq;
+		}
+		if (yi.cfg.mask & YAM_BITRATE) {
+			if (yi.cfg.bitrate > YAM_MAXBITRATE)
+				return -EINVAL;
+			yp->bitrate = yi.cfg.bitrate;
+		}
+		if (yi.cfg.mask & YAM_BAUDRATE) {
+			if (yi.cfg.baudrate > YAM_MAXBAUDRATE)
+				return -EINVAL;
+			yp->baudrate = yi.cfg.baudrate;
+		}
+		if (yi.cfg.mask & YAM_MODE) {
+			if (yi.cfg.mode > YAM_MAXMODE)
+				return -EINVAL;
+			yp->dupmode = yi.cfg.mode;
+		}
+		if (yi.cfg.mask & YAM_HOLDDLY) {
+			if (yi.cfg.holddly > YAM_MAXHOLDDLY)
+				return -EINVAL;
+			yp->holdd = yi.cfg.holddly;
+		}
+		if (yi.cfg.mask & YAM_TXDELAY) {
+			if (yi.cfg.txdelay > YAM_MAXTXDELAY)
+				return -EINVAL;
+			yp->txd = yi.cfg.txdelay;
+		}
+		if (yi.cfg.mask & YAM_TXTAIL) {
+			if (yi.cfg.txtail > YAM_MAXTXTAIL)
+				return -EINVAL;
+			yp->txtail = yi.cfg.txtail;
+		}
+		if (yi.cfg.mask & YAM_PERSIST) {
+			if (yi.cfg.persist > YAM_MAXPERSIST)
+				return -EINVAL;
+			yp->pers = yi.cfg.persist;
+		}
+		if (yi.cfg.mask & YAM_SLOTTIME) {
+			if (yi.cfg.slottime > YAM_MAXSLOTTIME)
+				return -EINVAL;
+			yp->slot = yi.cfg.slottime;
+			yp->slotcnt = yp->slot / 10;
+		}
+		break;
+
+	case SIOCYAMGCFG:
+		yi.cfg.mask = 0xffffffff;
+		yi.cfg.iobase = yp->iobase;
+		yi.cfg.irq = yp->irq;
+		yi.cfg.bitrate = yp->bitrate;
+		yi.cfg.baudrate = yp->baudrate;
+		yi.cfg.mode = yp->dupmode;
+		yi.cfg.txdelay = yp->txd;
+		yi.cfg.holddly = yp->holdd;
+		yi.cfg.txtail = yp->txtail;
+		yi.cfg.persist = yp->pers;
+		yi.cfg.slottime = yp->slot;
+		if (copy_to_user(ifr->ifr_data, &yi, sizeof(struct yamdrv_ioctl_cfg)))
+			 return -EFAULT;
+		break;
+
+	default:
+		return -EINVAL;
+
+	}
+
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int yam_set_mac_address(struct device *dev, void *addr)
+{
+	struct sockaddr *sa = (struct sockaddr *) addr;
+
+	/* addr is an AX.25 shifted ASCII mac address */
+	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int yam_probe(struct device *dev)
+{
+	struct yam_port *yp;
+
+	if (!dev)
+		return -ENXIO;
+
+	yp = (struct yam_port *) dev->priv;
+
+	dev->open = yam_open;
+	dev->stop = yam_close;
+	dev->do_ioctl = yam_ioctl;
+	dev->hard_start_xmit = yam_send_packet;
+	dev->get_stats = yam_get_stats;
+
+	dev_init_buffers(dev);
+	skb_queue_head_init(&yp->send_queue);
+
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+	dev->hard_header = ax25_encapsulate;
+	dev->rebuild_header = ax25_rebuild_header;
+#else							/* CONFIG_AX25 || CONFIG_AX25_MODULE */
+	dev->hard_header = NULL;
+	dev->rebuild_header = NULL;
+#endif							/* CONFIG_AX25 || CONFIG_AX25_MODULE */
+
+	dev->set_mac_address = yam_set_mac_address;
+
+	dev->type = ARPHRD_AX25;	/* AF_AX25 device */
+	dev->hard_header_len = 73;	/* We do digipeaters now */
+	dev->mtu = 256;				/* AX25 is the default */
+	dev->addr_len = 7;			/* sizeof an ax.25 address */
+	memcpy(dev->broadcast, ax25_bcast, 7);
+	memcpy(dev->dev_addr, ax25_test, 7);
+
+	/* New style flags */
+	dev->flags = 0;
+
+	return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+__initfunc(int yam_init(struct device *dev))
+{
+	int i;
+
+	printk(yam_drvinfo);
+
+	/* Clears the IRQ table */
+	memset(irqs, 0, sizeof(irqs));
+	memset(yam_ports, 0, sizeof(yam_ports));
+
+	for (i = 0; i < NR_PORTS; i++) {
+		sprintf(yam_ports[i].name, "yam%d", i);
+		yam_ports[i].magic = YAM_MAGIC;
+		yam_ports[i].bitrate = DEFAULT_BITRATE;
+		yam_ports[i].baudrate = DEFAULT_BITRATE * 2;
+		yam_ports[i].iobase = 0;
+		yam_ports[i].irq = 0;
+		yam_ports[i].dupmode = 0;
+		yam_ports[i].holdd = DEFAULT_HOLDD;
+		yam_ports[i].txd = DEFAULT_TXD;
+		yam_ports[i].txtail = DEFAULT_TXTAIL;
+		yam_ports[i].slot = DEFAULT_SLOT;
+		yam_ports[i].pers = DEFAULT_PERS;
+
+		dev = &yam_ports[i].dev;
+
+		dev->priv = &yam_ports[i];
+		dev->name = yam_ports[i].name;
+		dev->base_addr = yam_ports[i].iobase;
+		dev->irq = yam_ports[i].irq;
+		dev->init = yam_probe;
+		dev->if_port = 0;
+		dev->start = 0;
+		dev->tbusy = 1;
+
+		if (register_netdev(dev)) {
+			printk(KERN_WARNING "yam: cannot register net  device %s\n", dev->name);
+			return -ENXIO;
+		}
+	}
+
+	yam_timer.function = yam_dotimer;
+	yam_timer.expires = jiffies + HZ / 100;
+	add_timer(&yam_timer);
+
+	yam_net_procfs_init();
+
+	/* do not keep this device */
+	return 1;
+}
+
+/* --------------------------------------------------------------------- */
+
+#ifdef MODULE
+
+/*
+ * command line settable parameters
+ */
+
+#if LINUX_VERSION_CODE >= 0x20115
+
+MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr");
+MODULE_DESCRIPTION("Yam amateur radio modem driver");
+
+#endif
+
+__initfunc(int init_module(void))
+{
+	int ret = yam_init(NULL);
+
+	return (ret == 1) ? 0 : ret;
+}
+
+/* --------------------------------------------------------------------- */
+
+void cleanup_module(void)
+{
+	int i;
+
+	del_timer(&yam_timer);
+	for (i = 0; i < NR_PORTS; i++) {
+		struct device *dev = &yam_ports[i].dev;
+		if (!dev->priv)
+			continue;
+		if (dev->start)
+			yam_close(dev);
+		unregister_netdev(dev);
+	}
+	free_mcs();
+	yam_net_procfs_remove();
+}
+
+#endif							/* MODULE */
+/* --------------------------------------------------------------------- */

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)