patch-2.1.71 linux/drivers/net/hdlcdrv.c
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- Lines: 1025
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.1.70/linux/drivers/net/hdlcdrv.c
- Orig date:
Mon Dec 1 12:04:13 1997
diff -u --recursive --new-file v2.1.70/linux/drivers/net/hdlcdrv.c linux/drivers/net/hdlcdrv.c
@@ -1,1024 +0,0 @@
-/*****************************************************************************/
-
-/*
- * hdlcdrv.c -- HDLC packet radio network driver.
- *
- * Copyright (C) 1996 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.
- *
- * The driver was derived from Donald Beckers skeleton.c
- * Written 1993-94 by Donald Becker.
- *
- * History:
- * 0.1 21.09.96 Started
- * 18.10.96 Changed to new user space access routines
- * (copy_{to,from}_user)
- * 0.2 21.11.96 various small changes
- * 0.3 03.03.97 fixed (hopefully) IP not working with ax.25 as a module
- * 0.4 16.04.97 init code/data tagged
- * 0.5 30.07.97 made HDLC buffers bigger (solves a problem with the
- * soundmodem driver)
- */
-
-/*****************************************************************************/
-
-#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 <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/hdlcdrv.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>
-
-/* --------------------------------------------------------------------- */
-
-/*
- * 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
-
-/* --------------------------------------------------------------------- */
-
-#if LINUX_VERSION_CODE < 0x20125
-#define test_and_set_bit set_bit
-#define test_and_clear_bit clear_bit
-#endif
-
-/* --------------------------------------------------------------------- */
-
-/*
- * The name of the card. Is used for messages and in the requests for
- * io regions, irqs and dma channels
- */
-
-static char ax25_bcast[AX25_ADDR_LEN] =
-{'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1};
-static char ax25_nocall[AX25_ADDR_LEN] =
-{'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1};
-
-/* --------------------------------------------------------------------- */
-
-#define KISS_VERBOSE
-
-/* --------------------------------------------------------------------- */
-
-#define PARAM_TXDELAY 1
-#define PARAM_PERSIST 2
-#define PARAM_SLOTTIME 3
-#define PARAM_TXTAIL 4
-#define PARAM_FULLDUP 5
-#define PARAM_HARDWARE 6
-#define PARAM_RETURN 255
-
-/* --------------------------------------------------------------------- */
-
-#define min(a, b) (((a) < (b)) ? (a) : (b))
-#define max(a, b) (((a) > (b)) ? (a) : (b))
-
-/* --------------------------------------------------------------------- */
-/*
- * the CRC routines are stolen from WAMPES
- * by Dieter Deyke
- */
-
-static const unsigned short crc_ccitt_table[] = {
- 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
-};
-
-/*---------------------------------------------------------------------------*/
-
-static inline void append_crc_ccitt(unsigned char *buffer, int len)
-{
- unsigned int crc = 0xffff;
-
- for (;len>0;len--)
- crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
- crc ^= 0xffff;
- *buffer++ = crc;
- *buffer++ = crc >> 8;
-}
-
-/*---------------------------------------------------------------------------*/
-
-static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
-{
- unsigned int crc = 0xffff;
-
- for (; cnt > 0; cnt--)
- crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
- return (crc & 0xffff) == 0xf0b8;
-}
-
-/*---------------------------------------------------------------------------*/
-
-#if 0
-static int calc_crc_ccitt(const unsigned char *buf, int cnt)
-{
- unsigned int crc = 0xffff;
-
- for (; cnt > 0; cnt--)
- crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
- crc ^= 0xffff;
- return (crc & 0xffff);
-}
-#endif
-
-/* ---------------------------------------------------------------------- */
-
-#define tenms_to_2flags(s,tenms) ((tenms * s->par.bitrate) / 100 / 16)
-
-/* ---------------------------------------------------------------------- */
-/*
- * The HDLC routines
- */
-
-static int hdlc_rx_add_bytes(struct hdlcdrv_state *s, unsigned int bits,
- int num)
-{
- int added = 0;
-
- while (s->hdlcrx.rx_state && num >= 8) {
- if (s->hdlcrx.len >= sizeof(s->hdlcrx.buffer)) {
- s->hdlcrx.rx_state = 0;
- return 0;
- }
- *s->hdlcrx.bp++ = bits >> (32-num);
- s->hdlcrx.len++;
- num -= 8;
- added += 8;
- }
- return added;
-}
-
-static void hdlc_rx_flag(struct device *dev, struct hdlcdrv_state *s)
-{
- struct sk_buff *skb;
- int pkt_len;
- unsigned char *cp;
-
- if (s->hdlcrx.len < 4)
- return;
- if (!check_crc_ccitt(s->hdlcrx.buffer, s->hdlcrx.len))
- return;
- pkt_len = s->hdlcrx.len - 2 + 1; /* KISS kludge */
- if (!(skb = dev_alloc_skb(pkt_len))) {
- printk("%s: memory squeeze, dropping packet\n",
- s->ifname);
- s->stats.rx_dropped++;
- return;
- }
- skb->dev = dev;
- cp = skb_put(skb, pkt_len);
- *cp++ = 0; /* KISS kludge */
- memcpy(cp, s->hdlcrx.buffer, pkt_len - 1);
- skb->protocol = htons(ETH_P_AX25);
- skb->mac.raw = skb->data;
- netif_rx(skb);
- s->stats.rx_packets++;
-}
-
-void hdlcdrv_receiver(struct device *dev, struct hdlcdrv_state *s)
-{
- int i;
- unsigned int mask1, mask2, mask3, mask4, mask5, mask6, word;
-
- if (!s || s->magic != HDLCDRV_MAGIC)
- return;
- if (test_and_set_bit(0, &s->hdlcrx.in_hdlc_rx))
- return;
-
- while (!hdlcdrv_hbuf_empty(&s->hdlcrx.hbuf)) {
- word = hdlcdrv_hbuf_get(&s->hdlcrx.hbuf);
-
-#ifdef HDLCDRV_DEBUG
- hdlcdrv_add_bitbuffer_word(&s->bitbuf_hdlc, word);
-#endif /* HDLCDRV_DEBUG */
- s->hdlcrx.bitstream >>= 16;
- s->hdlcrx.bitstream |= word << 16;
- s->hdlcrx.bitbuf >>= 16;
- s->hdlcrx.bitbuf |= word << 16;
- s->hdlcrx.numbits += 16;
- for(i = 15, mask1 = 0x1fc00, mask2 = 0x1fe00, mask3 = 0x0fc00,
- mask4 = 0x1f800, mask5 = 0xf800, mask6 = 0xffff;
- i >= 0;
- i--, mask1 <<= 1, mask2 <<= 1, mask3 <<= 1, mask4 <<= 1,
- mask5 <<= 1, mask6 = (mask6 << 1) | 1) {
- if ((s->hdlcrx.bitstream & mask1) == mask1)
- s->hdlcrx.rx_state = 0; /* abort received */
- else if ((s->hdlcrx.bitstream & mask2) == mask3) {
- /* flag received */
- if (s->hdlcrx.rx_state) {
- hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf
- << (8+i),
- s->hdlcrx.numbits
- -8-i);
- hdlc_rx_flag(dev, s);
- }
- s->hdlcrx.len = 0;
- s->hdlcrx.bp = s->hdlcrx.buffer;
- s->hdlcrx.rx_state = 1;
- s->hdlcrx.numbits = i;
- } else if ((s->hdlcrx.bitstream & mask4) == mask5) {
- /* stuffed bit */
- s->hdlcrx.numbits--;
- s->hdlcrx.bitbuf = (s->hdlcrx.bitbuf & (~mask6)) |
- ((s->hdlcrx.bitbuf & mask6) << 1);
- }
- }
- s->hdlcrx.numbits -= hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf,
- s->hdlcrx.numbits);
- }
- clear_bit(0, &s->hdlcrx.in_hdlc_rx);
-}
-
-/* ---------------------------------------------------------------------- */
-
-static void inline do_kiss_params(struct hdlcdrv_state *s,
- unsigned char *data, unsigned long len)
-{
-
-#ifdef KISS_VERBOSE
-#define PKP(a,b) printk(KERN_INFO "%s: channel params: " a "\n", s->ifname, b)
-#else /* KISS_VERBOSE */
-#define PKP(a,b)
-#endif /* KISS_VERBOSE */
-
- if (len < 2)
- return;
- switch(data[0]) {
- case PARAM_TXDELAY:
- s->ch_params.tx_delay = data[1];
- PKP("TX delay = %ums", 10 * s->ch_params.tx_delay);
- break;
- case PARAM_PERSIST:
- s->ch_params.ppersist = data[1];
- PKP("p persistence = %u", s->ch_params.ppersist);
- break;
- case PARAM_SLOTTIME:
- s->ch_params.slottime = data[1];
- PKP("slot time = %ums", s->ch_params.slottime);
- break;
- case PARAM_TXTAIL:
- s->ch_params.tx_tail = data[1];
- PKP("TX tail = %ums", s->ch_params.tx_tail);
- break;
- case PARAM_FULLDUP:
- s->ch_params.fulldup = !!data[1];
- PKP("%s duplex", s->ch_params.fulldup ? "full" : "half");
- break;
- default:
- break;
- }
-#undef PKP
-}
-
-/* ---------------------------------------------------------------------- */
-
-void hdlcdrv_transmitter(struct device *dev, struct hdlcdrv_state *s)
-{
- unsigned int mask1, mask2, mask3;
- int i;
- struct sk_buff *skb;
- int pkt_len;
-
- if (!s || s->magic != HDLCDRV_MAGIC)
- return;
- if (test_and_set_bit(0, &s->hdlctx.in_hdlc_tx))
- return;
- for (;;) {
- if (s->hdlctx.numbits >= 16) {
- if (hdlcdrv_hbuf_full(&s->hdlctx.hbuf)) {
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- }
- hdlcdrv_hbuf_put(&s->hdlctx.hbuf, s->hdlctx.bitbuf);
- s->hdlctx.bitbuf >>= 16;
- s->hdlctx.numbits -= 16;
- }
- switch (s->hdlctx.tx_state) {
- default:
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- case 0:
- case 1:
- if (s->hdlctx.numflags) {
- s->hdlctx.numflags--;
- s->hdlctx.bitbuf |=
- 0x7e7e << s->hdlctx.numbits;
- s->hdlctx.numbits += 16;
- break;
- }
- if (s->hdlctx.tx_state == 1) {
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- }
- if (!(skb = skb_dequeue(&s->send_queue))) {
- int flgs = tenms_to_2flags
- (s, s->ch_params.tx_tail);
- if (flgs < 2)
- flgs = 2;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = flgs;
- break;
- }
- if (skb->data[0] != 0) {
- do_kiss_params(s, skb->data, skb->len);
- dev_kfree_skb(skb, FREE_WRITE);
- break;
- }
- pkt_len = skb->len-1; /* strip KISS byte */
- if (pkt_len >= HDLCDRV_MAXFLEN || pkt_len < 2) {
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = 1;
- dev_kfree_skb(skb, FREE_WRITE);
- break;
- }
- memcpy(s->hdlctx.buffer, skb->data+1, pkt_len);
- dev_kfree_skb(skb, FREE_WRITE);
- s->hdlctx.bp = s->hdlctx.buffer;
- append_crc_ccitt(s->hdlctx.buffer, pkt_len);
- s->hdlctx.len = pkt_len+2; /* the appended CRC */
- s->hdlctx.tx_state = 2;
- s->hdlctx.bitstream = 0;
- s->stats.tx_packets++;
- break;
- case 2:
- if (!s->hdlctx.len) {
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = 1;
- break;
- }
- s->hdlctx.len--;
- s->hdlctx.bitbuf |= *s->hdlctx.bp <<
- s->hdlctx.numbits;
- s->hdlctx.bitstream >>= 8;
- s->hdlctx.bitstream |= (*s->hdlctx.bp++) << 16;
- mask1 = 0x1f000;
- mask2 = 0x10000;
- mask3 = 0xffffffff >> (31-s->hdlctx.numbits);
- s->hdlctx.numbits += 8;
- for(i = 0; i < 8; i++, mask1 <<= 1, mask2 <<= 1,
- mask3 = (mask3 << 1) | 1) {
- if ((s->hdlctx.bitstream & mask1) != mask1)
- continue;
- s->hdlctx.bitstream &= ~mask2;
- s->hdlctx.bitbuf =
- (s->hdlctx.bitbuf & mask3) |
- ((s->hdlctx.bitbuf &
- (~mask3)) << 1);
- s->hdlctx.numbits++;
- mask3 = (mask3 << 1) | 1;
- }
- break;
- }
- }
-}
-
-/* ---------------------------------------------------------------------- */
-
-static void start_tx(struct device *dev, struct hdlcdrv_state *s)
-{
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = tenms_to_2flags(s, s->ch_params.tx_delay);
- s->hdlctx.bitbuf = s->hdlctx.bitstream = s->hdlctx.numbits = 0;
- hdlcdrv_transmitter(dev, s);
- s->hdlctx.ptt = 1;
- s->ptt_keyed++;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static unsigned short random_seed;
-
-static inline unsigned short random_num(void)
-{
- random_seed = 28629 * random_seed + 157;
- return random_seed;
-}
-
-/* ---------------------------------------------------------------------- */
-
-void hdlcdrv_arbitrate(struct device *dev, struct hdlcdrv_state *s)
-{
- if (!s || s->magic != HDLCDRV_MAGIC || s->hdlctx.ptt ||
- skb_queue_empty(&s->send_queue))
- return;
- if (s->ch_params.fulldup) {
- start_tx(dev, s);
- return;
- }
- if (s->hdlcrx.dcd) {
- s->hdlctx.slotcnt = s->ch_params.slottime;
- return;
- }
- if ((--s->hdlctx.slotcnt) > 0)
- return;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- if ((random_num() % 256) > s->ch_params.ppersist)
- return;
- start_tx(dev, s);
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== network driver interface =========================
- */
-
-static inline int hdlcdrv_paranoia_check(struct device *dev,
- const char *routine)
-{
- if (!dev || !dev->priv ||
- ((struct hdlcdrv_state *)dev->priv)->magic != HDLCDRV_MAGIC) {
- printk(KERN_ERR "hdlcdrv: bad magic number for hdlcdrv_state "
- "struct in routine %s\n", routine);
- return 1;
- }
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int hdlcdrv_send_packet(struct sk_buff *skb, struct device *dev)
-{
- struct hdlcdrv_state *sm;
-
- if (hdlcdrv_paranoia_check(dev, "hdlcdrv_send_packet"))
- return 0;
- sm = (struct hdlcdrv_state *)dev->priv;
- skb_queue_tail(&sm->send_queue, skb);
- dev->trans_start = jiffies;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int hdlcdrv_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;
-}
-
-/* --------------------------------------------------------------------- */
-
-#if LINUX_VERSION_CODE >= 0x20119
-static struct net_device_stats *hdlcdrv_get_stats(struct device *dev)
-#else
-static struct enet_statistics *hdlcdrv_get_stats(struct device *dev)
-#endif
-{
- struct hdlcdrv_state *sm;
-
- if (hdlcdrv_paranoia_check(dev, "hdlcdrv_get_stats"))
- return NULL;
- sm = (struct hdlcdrv_state *)dev->priv;
- /*
- * Get the current statistics. This may be called with the
- * card open or closed.
- */
- return &sm->stats;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * Open/initialize the board. This is called (in the current kernel)
- * sometime after booting when the 'ifconfig' program is run.
- *
- * This routine should set everything up anew at each open, even
- * registers that "should" only need to be set once at boot, so that
- * there is non-reboot way to recover if something goes wrong.
- */
-
-static int hdlcdrv_open(struct device *dev)
-{
- struct hdlcdrv_state *s;
- int i;
-
- if (hdlcdrv_paranoia_check(dev, "hdlcdrv_open"))
- return -EINVAL;
- s = (struct hdlcdrv_state *)dev->priv;
-
- if (dev->start)
- return 0;
- if (!s->ops || !s->ops->open)
- return -ENODEV;
-
- dev->start = 1;
- /*
- * initialise some variables
- */
- s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
- s->hdlcrx.in_hdlc_rx = 0;
- s->hdlcrx.rx_state = 0;
-
- s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
- s->hdlctx.in_hdlc_tx = 0;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = 0;
- s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
- s->hdlctx.ptt = 0;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- s->hdlctx.calibrate = 0;
-
- i = s->ops->open(dev);
- if (i) {
- dev->start = 0;
- return i;
- }
-
- dev->tbusy = 0;
- dev->interrupt = 0;
-
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * The inverse routine to hdlcdrv_open().
- */
-
-static int hdlcdrv_close(struct device *dev)
-{
- struct hdlcdrv_state *s;
- struct sk_buff *skb;
- int i = 0;
-
- if (hdlcdrv_paranoia_check(dev, "hdlcdrv_close"))
- return -EINVAL;
- s = (struct hdlcdrv_state *)dev->priv;
-
- if (!dev->start)
- return 0;
- dev->start = 0;
- dev->tbusy = 1;
-
- if (s->ops && s->ops->close)
- i = s->ops->close(dev);
- /* Free any buffers left in the hardware transmit queue */
- while ((skb = skb_dequeue(&s->send_queue)))
- dev_kfree_skb(skb, FREE_WRITE);
- return i;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int hdlcdrv_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
-{
- struct hdlcdrv_state *s;
- struct hdlcdrv_ioctl bi;
-
- if (hdlcdrv_paranoia_check(dev, "hdlcdrv_ioctl"))
- return -EINVAL;
- s = (struct hdlcdrv_state *)dev->priv;
-
- if (cmd != SIOCDEVPRIVATE) {
- if (s->ops && s->ops->ioctl)
- return s->ops->ioctl(dev, ifr, &bi, cmd);
- return -ENOIOCTLCMD;
- }
- if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi)))
- return -EFAULT;
-
- switch (bi.cmd) {
- default:
- if (s->ops && s->ops->ioctl)
- return s->ops->ioctl(dev, ifr, &bi, cmd);
- return -ENOIOCTLCMD;
-
- case HDLCDRVCTL_GETCHANNELPAR:
- bi.data.cp.tx_delay = s->ch_params.tx_delay;
- bi.data.cp.tx_tail = s->ch_params.tx_tail;
- bi.data.cp.slottime = s->ch_params.slottime;
- bi.data.cp.ppersist = s->ch_params.ppersist;
- bi.data.cp.fulldup = s->ch_params.fulldup;
- break;
-
- case HDLCDRVCTL_SETCHANNELPAR:
- if (!suser())
- return -EACCES;
- s->ch_params.tx_delay = bi.data.cp.tx_delay;
- s->ch_params.tx_tail = bi.data.cp.tx_tail;
- s->ch_params.slottime = bi.data.cp.slottime;
- s->ch_params.ppersist = bi.data.cp.ppersist;
- s->ch_params.fulldup = bi.data.cp.fulldup;
- s->hdlctx.slotcnt = 1;
- return 0;
-
- case HDLCDRVCTL_GETMODEMPAR:
- bi.data.mp.iobase = dev->base_addr;
- bi.data.mp.irq = dev->irq;
- bi.data.mp.dma = dev->dma;
- bi.data.mp.dma2 = s->ptt_out.dma2;
- bi.data.mp.seriobase = s->ptt_out.seriobase;
- bi.data.mp.pariobase = s->ptt_out.pariobase;
- bi.data.mp.midiiobase = s->ptt_out.midiiobase;
- break;
-
- case HDLCDRVCTL_SETMODEMPAR:
- if ((!suser()) || dev->start)
- return -EACCES;
- dev->base_addr = bi.data.mp.iobase;
- dev->irq = bi.data.mp.irq;
- dev->dma = bi.data.mp.dma;
- s->ptt_out.dma2 = bi.data.mp.dma2;
- s->ptt_out.seriobase = bi.data.mp.seriobase;
- s->ptt_out.pariobase = bi.data.mp.pariobase;
- s->ptt_out.midiiobase = bi.data.mp.midiiobase;
- return 0;
-
- case HDLCDRVCTL_GETSTAT:
- bi.data.cs.ptt = hdlcdrv_ptt(s);
- bi.data.cs.dcd = s->hdlcrx.dcd;
- bi.data.cs.ptt_keyed = s->ptt_keyed;
- bi.data.cs.tx_packets = s->stats.tx_packets;
- bi.data.cs.tx_errors = s->stats.tx_errors;
- bi.data.cs.rx_packets = s->stats.rx_packets;
- bi.data.cs.rx_errors = s->stats.rx_errors;
- break;
-
- case HDLCDRVCTL_OLDGETSTAT:
- bi.data.ocs.ptt = hdlcdrv_ptt(s);
- bi.data.ocs.dcd = s->hdlcrx.dcd;
- bi.data.ocs.ptt_keyed = s->ptt_keyed;
-#if LINUX_VERSION_CODE < 0x20100
- bi.data.ocs.stats = s->stats;
-#endif
- break;
-
- case HDLCDRVCTL_CALIBRATE:
- s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
- return 0;
-
- case HDLCDRVCTL_GETSAMPLES:
-#ifndef HDLCDRV_DEBUG
- return -EPERM;
-#else /* HDLCDRV_DEBUG */
- if (s->bitbuf_channel.rd == s->bitbuf_channel.wr)
- return -EAGAIN;
- bi.data.bits =
- s->bitbuf_channel.buffer[s->bitbuf_channel.rd];
- s->bitbuf_channel.rd = (s->bitbuf_channel.rd+1) %
- sizeof(s->bitbuf_channel.buffer);
- break;
-#endif /* HDLCDRV_DEBUG */
-
- case HDLCDRVCTL_GETBITS:
-#ifndef HDLCDRV_DEBUG
- return -EPERM;
-#else /* HDLCDRV_DEBUG */
- if (s->bitbuf_hdlc.rd == s->bitbuf_hdlc.wr)
- return -EAGAIN;
- bi.data.bits =
- s->bitbuf_hdlc.buffer[s->bitbuf_hdlc.rd];
- s->bitbuf_hdlc.rd = (s->bitbuf_hdlc.rd+1) %
- sizeof(s->bitbuf_hdlc.buffer);
- break;
-#endif /* HDLCDRV_DEBUG */
-
- case HDLCDRVCTL_DRIVERNAME:
- if (s->ops && s->ops->drvname) {
- strncpy(bi.data.drivername, s->ops->drvname,
- sizeof(bi.data.drivername));
- break;
- }
- bi.data.drivername[0] = '\0';
- break;
-
- }
- if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
-
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Check for a network adaptor of this type, and return '0' if one exists.
- * If dev->base_addr == 0, probe all likely locations.
- * If dev->base_addr == 1, always return failure.
- * If dev->base_addr == 2, allocate space for the device and return success
- * (detachable devices only).
- */
-static int hdlcdrv_probe(struct device *dev)
-{
- const struct hdlcdrv_channel_params dflt_ch_params = {
- 20, 2, 10, 40, 0
- };
- struct hdlcdrv_state *s;
-
- if (!dev)
- return -ENXIO;
- /*
- * not a real probe! only initialize data structures
- */
- s = (struct hdlcdrv_state *)dev->priv;
- /*
- * initialize the hdlcdrv_state struct
- */
- s->ch_params = dflt_ch_params;
- s->ptt_keyed = 0;
-
- s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
- s->hdlcrx.in_hdlc_rx = 0;
- s->hdlcrx.rx_state = 0;
-
- s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
- s->hdlctx.in_hdlc_tx = 0;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = 0;
- s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
- s->hdlctx.ptt = 0;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- s->hdlctx.calibrate = 0;
-
-#ifdef HDLCDRV_DEBUG
- s->bitbuf_channel.rd = s->bitbuf_channel.wr = 0;
- s->bitbuf_channel.shreg = 0x80;
-
- s->bitbuf_hdlc.rd = s->bitbuf_hdlc.wr = 0;
- s->bitbuf_hdlc.shreg = 0x80;
-#endif /* HDLCDRV_DEBUG */
-
- /*
- * initialize the device struct
- */
- dev->open = hdlcdrv_open;
- dev->stop = hdlcdrv_close;
- dev->do_ioctl = hdlcdrv_ioctl;
- dev->hard_start_xmit = hdlcdrv_send_packet;
- dev->get_stats = hdlcdrv_get_stats;
-
- /* Fill in the fields of the device structure */
-
- dev_init_buffers(dev);
-
- skb_queue_head_init(&s->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 = hdlcdrv_set_mac_address;
-
- dev->type = ARPHRD_AX25; /* AF_AX25 device */
- dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
- dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
- dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
- memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN);
- memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN);
-
- /* New style flags */
- dev->flags = 0;
-
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-int hdlcdrv_register_hdlcdrv(struct device *dev, const struct hdlcdrv_ops *ops,
- unsigned int privsize, char *ifname,
- unsigned int baseaddr, unsigned int irq,
- unsigned int dma)
-{
- struct hdlcdrv_state *s;
-
- if (!dev || !ops)
- return -EACCES;
- if (privsize < sizeof(struct hdlcdrv_state))
- privsize = sizeof(struct hdlcdrv_state);
- memset(dev, 0, sizeof(struct device));
- if (!(s = dev->priv = kmalloc(privsize, GFP_KERNEL)))
- return -ENOMEM;
- /*
- * initialize part of the hdlcdrv_state struct
- */
- memset(s, 0, privsize);
- s->magic = HDLCDRV_MAGIC;
- strncpy(s->ifname, ifname, sizeof(s->ifname));
- s->ops = ops;
- /*
- * initialize part of the device struct
- */
- dev->name = s->ifname;
- dev->if_port = 0;
- dev->init = hdlcdrv_probe;
- dev->start = 0;
- dev->tbusy = 1;
- dev->base_addr = baseaddr;
- dev->irq = irq;
- dev->dma = dma;
- if (register_netdev(dev)) {
- printk(KERN_WARNING "hdlcdrv: cannot register net "
- "device %s\n", s->ifname);
- kfree(dev->priv);
- return -ENXIO;
- }
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-int hdlcdrv_unregister_hdlcdrv(struct device *dev)
-{
- struct hdlcdrv_state *s;
-
- if (!dev)
- return -EINVAL;
- if (!(s = (struct hdlcdrv_state *)dev->priv))
- return -EINVAL;
- if (s->magic != HDLCDRV_MAGIC)
- return -EINVAL;
- if (dev->start && s->ops->close)
- s->ops->close(dev);
- unregister_netdev(dev);
- kfree(s);
- MOD_DEC_USE_COUNT;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-#if LINUX_VERSION_CODE >= 0x20115
-
-EXPORT_SYMBOL(hdlcdrv_receiver);
-EXPORT_SYMBOL(hdlcdrv_transmitter);
-EXPORT_SYMBOL(hdlcdrv_arbitrate);
-EXPORT_SYMBOL(hdlcdrv_register_hdlcdrv);
-EXPORT_SYMBOL(hdlcdrv_unregister_hdlcdrv);
-
-#else
-
-static struct symbol_table hdlcdrv_syms = {
-#include <linux/symtab_begin.h>
- X(hdlcdrv_receiver),
- X(hdlcdrv_transmitter),
- X(hdlcdrv_arbitrate),
- X(hdlcdrv_register_hdlcdrv),
- X(hdlcdrv_unregister_hdlcdrv),
-#include <linux/symtab_end.h>
-};
-
-#endif
-
-/* --------------------------------------------------------------------- */
-
-#ifdef MODULE
-
-#if LINUX_VERSION_CODE >= 0x20115
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Packet Radio network interface HDLC encoder/decoder");
-
-#endif
-
-/* --------------------------------------------------------------------- */
-
-__initfunc(int init_module(void))
-{
- printk(KERN_INFO "hdlcdrv: (C) 1996 Thomas Sailer HB9JNX/AE4WA\n");
- printk(KERN_INFO "hdlcdrv: version 0.5 compiled " __TIME__ " " __DATE__ "\n");
-#if LINUX_VERSION_CODE < 0x20115
- register_symtab(&hdlcdrv_syms);
-#endif
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-void cleanup_module(void)
-{
- printk(KERN_INFO "hdlcdrv: cleanup\n");
-}
-
-#endif /* MODULE */
-/* --------------------------------------------------------------------- */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov