patch-2.1.105 linux/drivers/net/hamradio/baycom_epp.c
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- Lines: 1557
- Date:
Sun Jun 7 11:13:45 1998
- Orig file:
v2.1.104/linux/drivers/net/hamradio/baycom_epp.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.104/linux/drivers/net/hamradio/baycom_epp.c linux/drivers/net/hamradio/baycom_epp.c
@@ -0,0 +1,1556 @@
+/*****************************************************************************/
+
+/*
+ * baycom_epp.c -- baycom epp radio modem driver.
+ *
+ * Copyright (C) 1998
+ * 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:
+ * 0.1 xx.xx.98 Initial version by Matthias Welwarsky (dg2fef)
+ * 0.2 21.04.98 Massive rework by Thomas Sailer
+ * Integrated FPGA EPP modem configuration routines
+ * 0.3 11.05.98 Took FPGA config out and moved it into a separate program
+ *
+ */
+
+/*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/socket.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/parport.h>
+#include <linux/bitops.h>
+#include <linux/sched.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+//#include <net/ax25dev.h>
+#include <linux/kmod.h>
+#include <linux/hdlcdrv.h>
+#include <linux/baycom.h>
+#include <linux/soundmodem.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 */
+
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.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 >= 0x20123
+#include <linux/init.h>
+#else
+#define __init
+#define __initdata
+#define __initfunc(x) x
+#endif
+
+/* --------------------------------------------------------------------- */
+
+#define BAYCOM_DEBUG
+#define BAYCOM_MAGIC 19730510
+
+/* --------------------------------------------------------------------- */
+
+static const char paranoia_str[] = KERN_ERR
+"baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
+
+#define baycom_paranoia_check(dev,routine,retval) \
+({ \
+ if (!dev || !dev->priv || ((struct baycom_state *)dev->priv)->magic != BAYCOM_MAGIC) { \
+ printk(paranoia_str, routine); \
+ return retval; \
+ } \
+})
+
+#define baycom_paranoia_check_void(dev,routine) \
+({ \
+ if (!dev || !dev->priv || ((struct baycom_state *)dev->priv)->magic != BAYCOM_MAGIC) { \
+ printk(paranoia_str, routine); \
+ return; \
+ } \
+})
+
+/* --------------------------------------------------------------------- */
+
+static const char bc_drvname[] = "baycom_epp";
+static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998 Thomas Sailer, HB9JNX/AE4WA\n"
+KERN_INFO "baycom_epp: version 0.3 compiled " __TIME__ " " __DATE__ "\n";
+
+/* --------------------------------------------------------------------- */
+
+#define NR_PORTS 4
+
+static struct device baycom_device[NR_PORTS];
+
+static struct {
+ const char *mode;
+ int iobase;
+} baycom_ports[NR_PORTS] = { { NULL, 0 }, };
+
+/* --------------------------------------------------------------------- */
+
+/* EPP status register */
+#define EPP_DCDBIT 0x80
+#define EPP_PTTBIT 0x08
+#define EPP_NREF 0x01
+#define EPP_NRAEF 0x02
+#define EPP_NRHF 0x04
+#define EPP_NTHF 0x20
+#define EPP_NTAEF 0x10
+#define EPP_NTEF EPP_PTTBIT
+
+/* EPP control register */
+#define EPP_TX_FIFO_ENABLE 0x10
+#define EPP_RX_FIFO_ENABLE 0x08
+#define EPP_MODEM_ENABLE 0x20
+#define EPP_LEDS 0xC0
+#define EPP_IRQ_ENABLE 0x10
+
+/* LPT registers */
+#define LPTREG_ECONTROL 0x402
+#define LPTREG_CONFIGB 0x401
+#define LPTREG_CONFIGA 0x400
+#define LPTREG_EPPDATA 0x004
+#define LPTREG_EPPADDR 0x003
+#define LPTREG_CONTROL 0x002
+#define LPTREG_STATUS 0x001
+#define LPTREG_DATA 0x000
+
+/* LPT control register */
+#define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */
+#define LPTCTRL_WRITE 0x01
+#define LPTCTRL_ADDRSTB 0x08
+#define LPTCTRL_DATASTB 0x02
+#define LPTCTRL_INTEN 0x10
+
+/* LPT status register */
+#define LPTSTAT_SHIFT_NINTR 6
+#define LPTSTAT_WAIT 0x80
+#define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR)
+#define LPTSTAT_PE 0x20
+#define LPTSTAT_DONE 0x10
+#define LPTSTAT_NERROR 0x08
+#define LPTSTAT_EPPTIMEOUT 0x01
+
+/* LPT data register */
+#define LPTDATA_SHIFT_TDI 0
+#define LPTDATA_SHIFT_TMS 2
+#define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI)
+#define LPTDATA_TCK 0x02
+#define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS)
+#define LPTDATA_INITBIAS 0x80
+
+
+/* EPP modem config/status bits */
+#define EPP_DCDBIT 0x80
+#define EPP_PTTBIT 0x08
+#define EPP_RXEBIT 0x01
+#define EPP_RXAEBIT 0x02
+#define EPP_RXHFULL 0x04
+
+#define EPP_NTHF 0x20
+#define EPP_NTAEF 0x10
+#define EPP_NTEF EPP_PTTBIT
+
+#define EPP_TX_FIFO_ENABLE 0x10
+#define EPP_RX_FIFO_ENABLE 0x08
+#define EPP_MODEM_ENABLE 0x20
+#define EPP_LEDS 0xC0
+#define EPP_IRQ_ENABLE 0x10
+
+/* Xilinx 4k JTAG instructions */
+#define XC4K_IRLENGTH 3
+#define XC4K_EXTEST 0
+#define XC4K_PRELOAD 1
+#define XC4K_CONFIGURE 5
+#define XC4K_BYPASS 7
+
+#define EPP_CONVENTIONAL 0
+#define EPP_FPGA 1
+#define EPP_FPGAEXTSTATUS 2
+
+#define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8)
+
+/* ---------------------------------------------------------------------- */
+/*
+ * Information that need to be kept for each board.
+ */
+
+struct baycom_state {
+ int magic;
+
+ struct pardevice *pdev;
+ unsigned int bh_running;
+ struct tq_struct run_bh;
+ unsigned int modem;
+ unsigned int bitrate;
+ unsigned char stat;
+
+ char ifname[HDLCDRV_IFNAMELEN];
+
+ struct {
+ unsigned int intclk;
+ unsigned int divider;
+ unsigned int extmodem;
+ unsigned int loopback;
+ } cfg;
+
+ struct hdlcdrv_channel_params ch_params;
+
+ struct {
+ unsigned int bitbuf, bitstream, numbits, state;
+ unsigned char *bufptr;
+ int bufcnt;
+ unsigned char buf[TXBUFFER_SIZE];
+ } hdlcrx;
+
+ struct {
+ int calibrate;
+ int slotcnt;
+ int flags;
+ enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
+ unsigned char *bufptr;
+ int bufcnt;
+ unsigned char buf[TXBUFFER_SIZE];
+ } hdlctx;
+
+ struct net_device_stats stats;
+ unsigned int ptt_keyed;
+ struct sk_buff_head send_queue; /* Packets awaiting transmission */
+
+
+#ifdef BAYCOM_DEBUG
+ struct debug_vals {
+ unsigned long last_jiffies;
+ unsigned cur_intcnt;
+ unsigned last_intcnt;
+ int cur_pllcorr;
+ int last_pllcorr;
+ unsigned int mod_cycles;
+ unsigned int demod_cycles;
+ } debug_vals;
+#endif /* BAYCOM_DEBUG */
+};
+
+/* --------------------------------------------------------------------- */
+
+#define min(a, b) (((a) < (b)) ? (a) : (b))
+#define max(a, b) (((a) > (b)) ? (a) : (b))
+
+/* --------------------------------------------------------------------- */
+
+#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
+
+/* --------------------------------------------------------------------- */
+/*
+ * 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
+};
+
+/*---------------------------------------------------------------------------*/
+
+#if 0
+extern 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;
+}
+#endif
+
+/*---------------------------------------------------------------------------*/
+
+extern 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;
+}
+
+/*---------------------------------------------------------------------------*/
+
+extern inline 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);
+}
+
+/* ---------------------------------------------------------------------- */
+
+#define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
+
+/* --------------------------------------------------------------------- */
+
+static void inline baycom_int_freq(struct baycom_state *bc)
+{
+#ifdef BAYCOM_DEBUG
+ unsigned long cur_jiffies = jiffies;
+ /*
+ * measure the interrupt frequency
+ */
+ bc->debug_vals.cur_intcnt++;
+ if ((cur_jiffies - bc->debug_vals.last_jiffies) >= HZ) {
+ bc->debug_vals.last_jiffies = cur_jiffies;
+ bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
+ bc->debug_vals.cur_intcnt = 0;
+ bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
+ bc->debug_vals.cur_pllcorr = 0;
+ }
+#endif /* BAYCOM_DEBUG */
+}
+
+/* ---------------------------------------------------------------------- */
+/*
+ * eppconfig_path should be setable via /proc/sys.
+ */
+
+char eppconfig_path[256] = "/sbin/eppfpga";
+
+static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
+
+static int errno;
+
+static int exec_eppfpga(void *b)
+{
+ struct baycom_state *bc = (struct baycom_state *)b;
+ char modearg[256];
+ char portarg[16];
+ char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg, NULL};
+ int i;
+
+ /* set up arguments */
+ sprintf(modearg, "%sclk,%smodem,divider=%d%s,extstat",
+ bc->cfg.intclk ? "int" : "ext",
+ bc->cfg.extmodem ? "ext" : "int", bc->cfg.divider,
+ bc->cfg.loopback ? ",loopback" : "");
+ sprintf(portarg, "%d", bc->pdev->port->base);
+ printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
+
+ for (i = 0; i < current->files->max_fds; i++ )
+ if (current->files->fd[i])
+ close(i);
+ set_fs(KERNEL_DS); /* Allow execve args to be in kernel space. */
+ current->uid = current->euid = current->fsuid = 0;
+ if (execve(eppconfig_path, argv, envp) < 0) {
+ printk(KERN_ERR "%s: failed to exec %s -s -p %s -m %s, errno = %d\n",
+ bc_drvname, eppconfig_path, portarg, modearg, errno);
+ return -errno;
+ }
+ return 0;
+}
+
+
+/* eppconfig: called during ifconfig up to configure the modem */
+
+static int eppconfig(struct baycom_state *bc)
+{
+ int i, pid, r;
+ mm_segment_t fs;
+
+ pid = kernel_thread(exec_eppfpga, bc, CLONE_FS);
+ if (pid < 0) {
+ printk(KERN_ERR "%s: fork failed, errno %d\n", bc_drvname, -pid);
+ return pid;
+ }
+ fs = get_fs();
+ set_fs(KERNEL_DS); /* Allow i to be in kernel space. */
+ r = waitpid(pid, &i, __WCLONE);
+ set_fs(fs);
+ if (r != pid) {
+ printk(KERN_ERR "%s: waitpid(%d) failed, returning %d\n",
+ bc_drvname, pid, r);
+ return -1;
+ }
+ printk(KERN_DEBUG "%s: eppfpga returned %d\n", bc_drvname, i);
+ return i;
+}
+
+/* ---------------------------------------------------------------------- */
+
+static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+}
+
+/* ---------------------------------------------------------------------- */
+
+static void inline do_kiss_params(struct baycom_state *bc,
+ unsigned char *data, unsigned long len)
+{
+
+#ifdef KISS_VERBOSE
+#define PKP(a,b) printk(KERN_INFO "%s: channel params: " a "\n", bc->ifname, b)
+#else /* KISS_VERBOSE */
+#define PKP(a,b)
+#endif /* KISS_VERBOSE */
+
+ if (len < 2)
+ return;
+ switch(data[0]) {
+ case PARAM_TXDELAY:
+ bc->ch_params.tx_delay = data[1];
+ PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
+ break;
+ case PARAM_PERSIST:
+ bc->ch_params.ppersist = data[1];
+ PKP("p persistence = %u", bc->ch_params.ppersist);
+ break;
+ case PARAM_SLOTTIME:
+ bc->ch_params.slottime = data[1];
+ PKP("slot time = %ums", bc->ch_params.slottime);
+ break;
+ case PARAM_TXTAIL:
+ bc->ch_params.tx_tail = data[1];
+ PKP("TX tail = %ums", bc->ch_params.tx_tail);
+ break;
+ case PARAM_FULLDUP:
+ bc->ch_params.fulldup = !!data[1];
+ PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
+ break;
+ default:
+ break;
+ }
+#undef PKP
+}
+
+/* --------------------------------------------------------------------- */
+/*
+ * high performance HDLC encoder
+ * yes, it's ugly, but generates pretty good code
+ */
+
+#define ENCODEITERA(j) \
+({ \
+ if (!(notbitstream & (0x1f0 << j))) \
+ goto stuff##j; \
+ encodeend##j: \
+})
+
+#define ENCODEITERB(j) \
+({ \
+ stuff##j: \
+ bitstream &= ~(0x100 << j); \
+ bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | \
+ ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); \
+ numbit++; \
+ notbitstream = ~bitstream; \
+ goto encodeend##j; \
+})
+
+
+static void encode_hdlc(struct baycom_state *bc)
+{
+ struct sk_buff *skb;
+ unsigned char *wp, *bp;
+ int pkt_len;
+ unsigned bitstream, notbitstream, bitbuf, numbit, crc;
+ unsigned char crcarr[2];
+
+ if (bc->hdlctx.bufcnt > 0)
+ return;
+ while ((skb = skb_dequeue(&bc->send_queue))) {
+ if (skb->data[0] != 0) {
+ do_kiss_params(bc, skb->data, skb->len);
+ dev_kfree_skb(skb);
+ continue;
+ }
+ pkt_len = skb->len-1; /* strip KISS byte */
+ if (pkt_len >= HDLCDRV_MAXFLEN || pkt_len < 2) {
+ dev_kfree_skb(skb);
+ continue;
+ }
+ wp = bc->hdlctx.buf;
+ bp = skb->data+1;
+ crc = calc_crc_ccitt(bp, pkt_len);
+ crcarr[0] = crc;
+ crcarr[1] = crc >> 8;
+ *wp++ = 0x7e;
+ bitstream = bitbuf = numbit = 0;
+ while (pkt_len > -2) {
+ bitstream >>= 8;
+ bitstream |= ((unsigned int)*bp) << 8;
+ bitbuf |= ((unsigned int)*bp) << numbit;
+ notbitstream = ~bitstream;
+ bp++;
+ pkt_len--;
+ if (!pkt_len)
+ bp = crcarr;
+ ENCODEITERA(0);
+ ENCODEITERA(1);
+ ENCODEITERA(2);
+ ENCODEITERA(3);
+ ENCODEITERA(4);
+ ENCODEITERA(5);
+ ENCODEITERA(6);
+ ENCODEITERA(7);
+ goto enditer;
+ ENCODEITERB(0);
+ ENCODEITERB(1);
+ ENCODEITERB(2);
+ ENCODEITERB(3);
+ ENCODEITERB(4);
+ ENCODEITERB(5);
+ ENCODEITERB(6);
+ ENCODEITERB(7);
+ enditer:
+ numbit += 8;
+ while (numbit >= 8) {
+ *wp++ = bitbuf;
+ bitbuf >>= 8;
+ numbit -= 8;
+ }
+ }
+ bitbuf |= 0x7e7e << numbit;
+ numbit += 16;
+ while (numbit >= 8) {
+ *wp++ = bitbuf;
+ bitbuf >>= 8;
+ numbit -= 8;
+ }
+ bc->hdlctx.bufptr = bc->hdlctx.buf;
+ bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
+ dev_kfree_skb(skb);
+ bc->stats.tx_packets++;
+ return;
+ }
+}
+
+/* ---------------------------------------------------------------------- */
+
+static unsigned short random_seed;
+
+static inline unsigned short random_num(void)
+{
+ random_seed = 28629 * random_seed + 157;
+ return random_seed;
+}
+
+/* ---------------------------------------------------------------------- */
+
+static void transmit(struct baycom_state *bc, int cnt, unsigned char stat)
+{
+ struct parport *pp = bc->pdev->port;
+ int i;
+
+ if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
+ bc->hdlctx.state = tx_idle;
+ if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
+ if (bc->hdlctx.bufcnt <= 0)
+ encode_hdlc(bc);
+ if (bc->hdlctx.bufcnt <= 0)
+ return;
+ if (!bc->ch_params.fulldup) {
+ if (!(stat & EPP_DCDBIT)) {
+ bc->hdlctx.slotcnt = bc->ch_params.slottime;
+ return;
+ }
+ if ((--bc->hdlctx.slotcnt) > 0)
+ return;
+ bc->hdlctx.slotcnt = bc->ch_params.slottime;
+ if ((random_num() % 256) > bc->ch_params.ppersist)
+ return;
+ }
+ }
+ if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
+ bc->hdlctx.state = tx_keyup;
+ bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
+ bc->ptt_keyed++;
+ }
+ while (cnt > 0) {
+ switch (bc->hdlctx.state) {
+ case tx_keyup:
+ i = min(cnt, bc->hdlctx.flags);
+ cnt -= i;
+ bc->hdlctx.flags -= i;
+ if (bc->hdlctx.flags <= 0)
+ bc->hdlctx.state = tx_data;
+ for (; i > 0; i--)
+ parport_epp_write_data(pp, 0x7e);
+ break;
+
+ case tx_data:
+ if (bc->hdlctx.bufcnt <= 0) {
+ encode_hdlc(bc);
+ if (bc->hdlctx.bufcnt <= 0) {
+ bc->hdlctx.state = tx_tail;
+ bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
+ break;
+ }
+ }
+ i = min(cnt, bc->hdlctx.bufcnt);
+ bc->hdlctx.bufcnt -= i;
+ cnt -= i;
+ for (; i > 0; i--)
+ parport_epp_write_data(pp, *(bc->hdlctx.bufptr)++);
+ break;
+
+ case tx_tail:
+ encode_hdlc(bc);
+ if (bc->hdlctx.bufcnt > 0) {
+ bc->hdlctx.state = tx_data;
+ break;
+ }
+ i = min(cnt, bc->hdlctx.flags);
+ if (i) {
+ cnt -= i;
+ bc->hdlctx.flags -= i;
+ for (; i > 0; i--)
+ parport_epp_write_data(pp, 0x7e);
+ break;
+ }
+
+ default: /* fall through */
+ if (bc->hdlctx.calibrate <= 0)
+ return;
+ i = min(cnt, bc->hdlctx.calibrate);
+ cnt -= i;
+ bc->hdlctx.calibrate -= i;
+ for (; i > 0; i--)
+ parport_epp_write_data(pp, 0);
+ break;
+ }
+ }
+}
+
+/* ---------------------------------------------------------------------- */
+
+static void do_rxpacket(struct device *dev)
+{
+ struct baycom_state *bc = (struct baycom_state *)dev->priv;
+ struct sk_buff *skb;
+ unsigned char *cp;
+ unsigned pktlen;
+
+ if (bc->hdlcrx.bufcnt < 4)
+ return;
+ if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
+ return;
+ pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
+ if (!(skb = dev_alloc_skb(pktlen))) {
+ printk("%s: memory squeeze, dropping packet\n", bc->ifname);
+ bc->stats.rx_dropped++;
+ return;
+ }
+ skb->dev = dev;
+ cp = skb_put(skb, pktlen);
+ *cp++ = 0; /* KISS kludge */
+ memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
+ skb->protocol = htons(ETH_P_AX25);
+ skb->mac.raw = skb->data;
+ netif_rx(skb);
+ bc->stats.rx_packets++;
+}
+
+#define DECODEITERA(j) \
+({ \
+ if (!(notbitstream & (0x0fc << j))) /* flag or abort */ \
+ goto flgabrt##j; \
+ if ((bitstream & (0x1f8 << j)) == (0xf8 << j)) /* stuffed bit */ \
+ goto stuff##j; \
+ enditer##j: \
+})
+
+#define DECODEITERB(j) \
+({ \
+ flgabrt##j: \
+ if (!(notbitstream & (0x1fc << j))) { /* abort received */ \
+ state = 0; \
+ goto enditer##j; \
+ } \
+ if ((bitstream & (0x1fe << j)) != (0x0fc << j)) /* flag received */ \
+ goto enditer##j; \
+ if (state) \
+ do_rxpacket(dev); \
+ bc->hdlcrx.bufcnt = 0; \
+ bc->hdlcrx.bufptr = bc->hdlcrx.buf; \
+ state = 1; \
+ numbits = 7-j; \
+ goto enditer##j; \
+ stuff##j: \
+ numbits--; \
+ bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); \
+ goto enditer##j; \
+})
+
+static void receive(struct device *dev, int cnt)
+{
+ struct baycom_state *bc = (struct baycom_state *)dev->priv;
+ struct parport *pp = bc->pdev->port;
+ unsigned int bitbuf, notbitstream, bitstream, numbits, state;
+ unsigned char ch;
+
+ numbits = bc->hdlcrx.numbits;
+ state = bc->hdlcrx.state;
+ bitstream = bc->hdlcrx.bitstream;
+ bitbuf = bc->hdlcrx.bitbuf;
+ for (; cnt > 0; cnt--) {
+ ch = parport_epp_read_data(pp);
+ bitstream >>= 8;
+ bitstream |= ch << 8;
+ bitbuf >>= 8;
+ bitbuf |= ch << 8;
+ numbits += 8;
+ notbitstream = ~bitstream;
+ DECODEITERA(0);
+ DECODEITERA(1);
+ DECODEITERA(2);
+ DECODEITERA(3);
+ DECODEITERA(4);
+ DECODEITERA(5);
+ DECODEITERA(6);
+ DECODEITERA(7);
+ goto enddec;
+ DECODEITERB(0);
+ DECODEITERB(1);
+ DECODEITERB(2);
+ DECODEITERB(3);
+ DECODEITERB(4);
+ DECODEITERB(5);
+ DECODEITERB(6);
+ DECODEITERB(7);
+ enddec:
+ while (state && numbits >= 8) {
+ if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
+ state = 0;
+ } else {
+ *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
+ bc->hdlcrx.bufcnt++;
+ numbits -= 8;
+ }
+ }
+ }
+ bc->hdlcrx.numbits = numbits;
+ bc->hdlcrx.state = state;
+ bc->hdlcrx.bitstream = bitstream;
+ bc->hdlcrx.bitbuf = bitbuf;
+}
+
+/* --------------------------------------------------------------------- */
+
+#ifdef __i386__
+#define GETTICK(x) \
+({ \
+ if (current_cpu_data.x86_capability & 0x10) \
+ __asm__ __volatile__("rdtsc" : "=a" (x) : : "dx");\
+})
+#else /* __i386__ */
+#define GETTICK(x)
+#endif /* __i386__ */
+
+static void epp_bh(struct device *dev)
+{
+ struct baycom_state *bc;
+ struct parport *pp;
+ unsigned char stat;
+ unsigned int time1 = 0, time2 = 0, time3 = 0;
+ int cnt, cnt2;
+
+ baycom_paranoia_check_void(dev, "epp_bh");
+ bc = (struct baycom_state *)dev->priv;
+ if (!bc->bh_running)
+ return;
+ baycom_int_freq(bc);
+ pp = bc->pdev->port;
+ /* update status */
+ bc->stat = stat = parport_epp_read_addr(pp);
+ bc->debug_vals.last_pllcorr = stat;
+ GETTICK(time1);
+ if (bc->modem == EPP_FPGAEXTSTATUS) {
+ /* get input count */
+ parport_epp_write_addr(pp, EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1);
+ cnt = parport_epp_read_addr(pp);
+ cnt |= parport_epp_read_addr(pp) << 8;
+ cnt &= 0x7fff;
+ /* get output count */
+ parport_epp_write_addr(pp, EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2);
+ cnt2 = parport_epp_read_addr(pp);
+ cnt2 |= parport_epp_read_addr(pp) << 8;
+ cnt2 = 16384 - (cnt2 & 0x7fff);
+ /* return to normal */
+ parport_epp_write_addr(pp, EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE);
+ transmit(bc, cnt2, stat);
+ GETTICK(time2);
+ receive(dev, cnt);
+ bc->stat = stat = parport_epp_read_addr(pp);
+ } else {
+ /* try to tx */
+ switch (stat & (EPP_NTAEF|EPP_NTHF)) {
+ case EPP_NTHF:
+ cnt = 2048 - 256;
+ break;
+
+ case EPP_NTAEF:
+ cnt = 2048 - 1793;
+ break;
+
+ case 0:
+ cnt = 0;
+ break;
+
+ default:
+ cnt = 2048 - 1025;
+ break;
+ }
+ transmit(bc, cnt, stat);
+ GETTICK(time2);
+ /* do receiver */
+ while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
+ switch (stat & (EPP_NRAEF|EPP_NRHF)) {
+ case EPP_NRAEF:
+ cnt = 1025;
+ break;
+
+ case 0:
+ cnt = 1793;
+ break;
+
+ default:
+ cnt = 256;
+ break;
+ }
+ receive(dev, cnt);
+ stat = parport_epp_read_addr(pp);
+ if (parport_epp_check_timeout(pp))
+ goto epptimeout;
+ }
+ cnt = 0;
+ if (bc->bitrate < 50000)
+ cnt = 256;
+ else if (bc->bitrate < 100000)
+ cnt = 128;
+ while (cnt > 0 && stat & EPP_NREF) {
+ receive(dev, 1);
+ cnt--;
+ stat = parport_epp_read_addr(pp);
+ }
+ }
+ GETTICK(time3);
+#ifdef BAYCOM_DEBUG
+ bc->debug_vals.mod_cycles = time2 - time1;
+ bc->debug_vals.demod_cycles = time3 - time2;
+#endif /* BAYCOM_DEBUG */
+ if (parport_epp_check_timeout(pp))
+ goto epptimeout;
+ queue_task(&bc->run_bh, &tq_timer);
+ return;
+ epptimeout:
+ printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
+}
+
+/* ---------------------------------------------------------------------- */
+/*
+ * ===================== network driver interface =========================
+ */
+
+static int baycom_send_packet(struct sk_buff *skb, struct device *dev)
+{
+ struct baycom_state *bc;
+
+ baycom_paranoia_check(dev, "baycom_send_packet", 0);
+ bc = (struct baycom_state *)dev->priv;
+ skb_queue_tail(&bc->send_queue, skb);
+ dev->trans_start = jiffies;
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int baycom_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 struct net_device_stats *baycom_get_stats(struct device *dev)
+{
+ struct baycom_state *bc;
+
+ baycom_paranoia_check(dev, "baycom_get_stats", NULL);
+ bc = (struct baycom_state *)dev->priv;
+ /*
+ * Get the current statistics. This may be called with the
+ * card open or closed.
+ */
+ return &bc->stats;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int epp_preempt(void *handle)
+{
+ /* we cannot relinquish the port in the middle of an operation */
+ return 1;
+}
+
+/* --------------------------------------------------------------------- */
+
+static void epp_wakeup(void *handle)
+{
+ struct device *dev = (struct device *)handle;
+ struct baycom_state *bc;
+
+ baycom_paranoia_check_void(dev, "epp_wakeup");
+ bc = (struct baycom_state *)dev->priv;
+ printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
+ if (!parport_claim(bc->pdev))
+ printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * 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 epp_open(struct device *dev)
+{
+ struct baycom_state *bc;
+ struct parport *pp;
+ const struct tq_struct run_bh = {
+ 0, 0, (void *)(void *)epp_bh, dev
+ };
+ unsigned int i, j;
+ unsigned char stat;
+ unsigned long tstart;
+
+ baycom_paranoia_check(dev, "epp_open", -ENXIO);
+ bc = (struct baycom_state *)dev->priv;
+ if (dev->start)
+ return 0;
+ pp = parport_enumerate();
+ while (pp && pp->base != dev->base_addr)
+ pp = pp->next;
+ if (!pp) {
+ printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
+ return -ENXIO;
+ }
+#if 0
+ if (pp->irq < 0) {
+ printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
+ return -ENXIO;
+ }
+#endif
+ memset(&bc->modem, 0, sizeof(bc->modem));
+ if (!(bc->pdev = parport_register_device(pp, dev->name, epp_preempt, epp_wakeup,
+ epp_interrupt, PARPORT_DEV_LURK, dev))) {
+ printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
+ return -ENXIO;
+ }
+ if (parport_claim(bc->pdev)) {
+ printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
+ parport_unregister_device(bc->pdev);
+ return -EBUSY;
+ }
+ if (!(pp->modes & (PARPORT_MODE_PCECPEPP|PARPORT_MODE_PCEPP))) {
+ printk(KERN_ERR "%s: parport at 0x%lx does not support any EPP mode\n",
+ bc_drvname, pp->base);
+ parport_unregister_device(bc->pdev);
+ return -EIO;
+ }
+ dev->irq = /*pp->irq*/ 0;
+ bc->run_bh = run_bh;
+ bc->bh_running = 1;
+ if (pp->modes & PARPORT_MODE_PCECPEPP) {
+ printk(KERN_INFO "%s: trying to enable EPP mode\n", bc_drvname);
+ parport_frob_econtrol(pp, 0xe0, 0x80);
+ }
+ /* bc->pdev->port->ops->change_mode(bc->pdev->port, PARPORT_MODE_PCEPP); not yet implemented */
+ bc->modem = EPP_CONVENTIONAL;
+ if (eppconfig(bc))
+ printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
+ else
+ bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
+ parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
+ /* reset the modem */
+ parport_epp_write_addr(pp, 0);
+ parport_epp_write_addr(pp, EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE);
+ /* autoprobe baud rate */
+ tstart = jiffies;
+ i = 0;
+ while ((signed)(jiffies-tstart-HZ/3) < 0) {
+ stat = parport_epp_read_addr(pp);
+ if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
+ schedule();
+ continue;
+ }
+ for (j = 0; j < 256; j++)
+ parport_epp_read_data(pp);
+ i += 256;
+ }
+ for (j = 0; j < 256; j++) {
+ stat = parport_epp_read_addr(pp);
+ if (!(stat & EPP_NREF))
+ break;
+ parport_epp_read_data(pp);
+ i++;
+ }
+ tstart = jiffies - tstart;
+ bc->bitrate = i * (8 * HZ) / tstart;
+ j = 1;
+ i = bc->bitrate >> 3;
+ while (j < 7 && i > 150) {
+ j++;
+ i >>= 1;
+ }
+ printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
+ bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
+ parport_epp_write_addr(pp, EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/);
+ /*
+ * initialise hdlc variables
+ */
+ bc->hdlcrx.state = 0;
+ bc->hdlcrx.numbits = 0;
+ bc->hdlctx.state = tx_idle;
+ bc->hdlctx.bufcnt = 0;
+ bc->hdlctx.slotcnt = bc->ch_params.slottime;
+ bc->hdlctx.calibrate = 0;
+ dev->start = 1;
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ /* start the bottom half stuff */
+ queue_task(&bc->run_bh, &tq_timer);
+ MOD_INC_USE_COUNT;
+ return 0;
+
+#if 0
+ errreturn:
+ parport_release(bc->pdev);
+ parport_unregister_device(bc->pdev);
+ return -EIO;
+#endif
+}
+
+/* --------------------------------------------------------------------- */
+
+static int epp_close(struct device *dev)
+{
+ struct baycom_state *bc;
+ struct parport *pp;
+ struct sk_buff *skb;
+
+ baycom_paranoia_check(dev, "epp_close", -EINVAL);
+ if (!dev->start)
+ return 0;
+ bc = (struct baycom_state *)dev->priv;
+ pp = bc->pdev->port;
+ bc->bh_running = 0;
+ dev->start = 0;
+ dev->tbusy = 1;
+ run_task_queue(&tq_timer); /* dequeue bottom half */
+ bc->stat = EPP_DCDBIT;
+ parport_epp_write_addr(pp, 0);
+ parport_write_control(pp, 0); /* reset the adapter */
+ parport_release(bc->pdev);
+ parport_unregister_device(bc->pdev);
+ /* Free any buffers left in the hardware transmit queue */
+ while ((skb = skb_dequeue(&bc->send_queue)))
+ dev_kfree_skb(skb);
+ printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
+ bc_drvname, dev->base_addr, dev->irq);
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int baycom_setmode(struct baycom_state *bc, const char *modestr)
+{
+ const char *cp;
+
+ if (strstr(modestr,"intclk"))
+ bc->cfg.intclk = 1;
+ if (strstr(modestr,"extclk"))
+ bc->cfg.intclk = 0;
+ if (strstr(modestr,"intmodem"))
+ bc->cfg.extmodem = 0;
+ if (strstr(modestr,"extmodem"))
+ bc->cfg.extmodem = 1;
+ if (strstr(modestr,"noloopback"))
+ bc->cfg.loopback = 0;
+ if (strstr(modestr,"loopback"))
+ bc->cfg.loopback = 1;
+ if ((cp = strstr(modestr,"divider="))) {
+ bc->cfg.divider = simple_strtoul(cp+8, NULL, 0);
+ if (bc->cfg.divider < 1)
+ bc->cfg.divider = 1;
+ if (bc->cfg.divider > 1023)
+ bc->cfg.divider = 1023;
+ }
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int baycom_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
+{
+ struct baycom_state *bc;
+ struct baycom_ioctl bi;
+ struct hdlcdrv_ioctl hi;
+ struct sm_ioctl si;
+
+ baycom_paranoia_check(dev, "baycom_ioctl", -EINVAL);
+ bc = (struct baycom_state *)dev->priv;
+ if (cmd != SIOCDEVPRIVATE)
+ return -ENOIOCTLCMD;
+ if (get_user(cmd, (int *)ifr->ifr_data))
+ return -EFAULT;
+#ifdef BAYCOM_DEBUG
+ if (cmd == BAYCOMCTL_GETDEBUG) {
+ bi.data.dbg.debug1 = bc->ptt_keyed;
+ bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
+ bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
+ bc->debug_vals.last_intcnt = 0;
+ if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == SMCTL_GETDEBUG) {
+ si.data.dbg.int_rate = bc->debug_vals.last_intcnt;
+ si.data.dbg.mod_cycles = bc->debug_vals.mod_cycles;
+ si.data.dbg.demod_cycles = bc->debug_vals.demod_cycles;
+ si.data.dbg.dma_residue = 0;
+ bc->debug_vals.mod_cycles = bc->debug_vals.demod_cycles = 0;
+ bc->debug_vals.last_intcnt = 0;
+ if (copy_to_user(ifr->ifr_data, &si, sizeof(si)))
+ return -EFAULT;
+ return 0;
+ }
+#endif /* BAYCOM_DEBUG */
+
+ if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
+ return -EFAULT;
+ switch (hi.cmd) {
+ default:
+ return -ENOIOCTLCMD;
+
+ case HDLCDRVCTL_GETCHANNELPAR:
+ hi.data.cp.tx_delay = bc->ch_params.tx_delay;
+ hi.data.cp.tx_tail = bc->ch_params.tx_tail;
+ hi.data.cp.slottime = bc->ch_params.slottime;
+ hi.data.cp.ppersist = bc->ch_params.ppersist;
+ hi.data.cp.fulldup = bc->ch_params.fulldup;
+ break;
+
+ case HDLCDRVCTL_SETCHANNELPAR:
+ if (!suser())
+ return -EACCES;
+ bc->ch_params.tx_delay = hi.data.cp.tx_delay;
+ bc->ch_params.tx_tail = hi.data.cp.tx_tail;
+ bc->ch_params.slottime = hi.data.cp.slottime;
+ bc->ch_params.ppersist = hi.data.cp.ppersist;
+ bc->ch_params.fulldup = hi.data.cp.fulldup;
+ bc->hdlctx.slotcnt = 1;
+ return 0;
+
+ case HDLCDRVCTL_GETMODEMPAR:
+ hi.data.mp.iobase = dev->base_addr;
+ hi.data.mp.irq = dev->irq;
+ hi.data.mp.dma = dev->dma;
+ hi.data.mp.dma2 = 0;
+ hi.data.mp.seriobase = 0;
+ hi.data.mp.pariobase = 0;
+ hi.data.mp.midiiobase = 0;
+ break;
+
+ case HDLCDRVCTL_SETMODEMPAR:
+ if ((!suser()) || dev->start)
+ return -EACCES;
+ dev->base_addr = hi.data.mp.iobase;
+ dev->irq = /*hi.data.mp.irq*/0;
+ dev->dma = /*hi.data.mp.dma*/0;
+ return 0;
+
+ case HDLCDRVCTL_GETSTAT:
+ hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
+ hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
+ hi.data.cs.ptt_keyed = bc->ptt_keyed;
+ hi.data.cs.tx_packets = bc->stats.tx_packets;
+ hi.data.cs.tx_errors = bc->stats.tx_errors;
+ hi.data.cs.rx_packets = bc->stats.rx_packets;
+ hi.data.cs.rx_errors = bc->stats.rx_errors;
+ break;
+
+ case HDLCDRVCTL_OLDGETSTAT:
+ hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
+ hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
+ hi.data.ocs.ptt_keyed = bc->ptt_keyed;
+ break;
+
+ case HDLCDRVCTL_CALIBRATE:
+ bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
+ return 0;
+
+ case HDLCDRVCTL_DRIVERNAME:
+ strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
+ break;
+
+ case HDLCDRVCTL_GETMODE:
+ sprintf(hi.data.modename, "%sclk,%smodem,divider=%d%s",
+ bc->cfg.intclk ? "int" : "ext",
+ bc->cfg.extmodem ? "ext" : "int", bc->cfg.divider,
+ bc->cfg.loopback ? ",loopback" : "");
+ break;
+
+ case HDLCDRVCTL_SETMODE:
+ if (!suser() || dev->start)
+ return -EACCES;
+ hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
+ return baycom_setmode(bc, hi.data.modename);
+
+ case HDLCDRVCTL_MODELIST:
+ strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
+ sizeof(hi.data.modename));
+ break;
+
+ case HDLCDRVCTL_MODEMPARMASK:
+ return HDLCDRV_PARMASK_IOBASE;
+
+ }
+ if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
+ 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 baycom_probe(struct device *dev)
+{
+ 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
+ };
+ const struct hdlcdrv_channel_params dflt_ch_params = {
+ 20, 2, 10, 40, 0
+ };
+ struct baycom_state *bc;
+
+ if (!dev)
+ return -ENXIO;
+ baycom_paranoia_check(dev, "baycom_probe", -ENXIO);
+ /*
+ * not a real probe! only initialize data structures
+ */
+ bc = (struct baycom_state *)dev->priv;
+ /*
+ * initialize the baycom_state struct
+ */
+ bc->ch_params = dflt_ch_params;
+ bc->ptt_keyed = 0;
+
+ /*
+ * initialize the device struct
+ */
+ dev->open = epp_open;
+ dev->stop = epp_close;
+ dev->do_ioctl = baycom_ioctl;
+ dev->hard_start_xmit = baycom_send_packet;
+ dev->get_stats = baycom_get_stats;
+
+ /* Fill in the fields of the device structure */
+ dev_init_buffers(dev);
+
+ skb_queue_head_init(&bc->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 = baycom_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;
+}
+
+/* --------------------------------------------------------------------- */
+
+__initfunc(int baycom_epp_init(void))
+{
+ struct device *dev;
+ int i, found = 0;
+ char set_hw = 1;
+ struct baycom_state *bc;
+
+ printk(bc_drvinfo);
+ /*
+ * register net devices
+ */
+ for (i = 0; i < NR_PORTS; i++) {
+ dev = baycom_device+i;
+ if (!baycom_ports[i].mode)
+ set_hw = 0;
+ if (!set_hw)
+ baycom_ports[i].iobase = 0;
+ memset(dev, 0, sizeof(struct device));
+ if (!(bc = dev->priv = kmalloc(sizeof(struct baycom_state), GFP_KERNEL)))
+ return -ENOMEM;
+ /*
+ * initialize part of the baycom_state struct
+ */
+ memset(bc, 0, sizeof(struct baycom_state));
+ bc->magic = BAYCOM_MAGIC;
+ sprintf(bc->ifname, "bce%d", i);
+ /*
+ * initialize part of the device struct
+ */
+ dev->name = bc->ifname;
+ dev->if_port = 0;
+ dev->init = baycom_probe;
+ dev->start = 0;
+ dev->tbusy = 1;
+ dev->base_addr = baycom_ports[i].iobase;
+ dev->irq = 0;
+ dev->dma = 0;
+ if (register_netdev(dev)) {
+ printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, bc->ifname);
+ kfree(dev->priv);
+ return -ENXIO;
+ }
+ if (set_hw && baycom_setmode(bc, baycom_ports[i].mode))
+ set_hw = 0;
+ found++;
+ }
+ if (!found)
+ return -ENXIO;
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+#ifdef MODULE
+
+/*
+ * command line settable parameters
+ */
+static const char *mode[NR_PORTS] = { "epp", };
+static int iobase[NR_PORTS] = { 0x378, };
+
+#if LINUX_VERSION_CODE >= 0x20115
+
+MODULE_PARM(mode, "s");
+MODULE_PARM_DESC(mode, "baycom operating mode; epp");
+MODULE_PARM(iobase, "i");
+MODULE_PARM_DESC(iobase, "baycom io base address");
+
+MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
+MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
+
+#endif
+
+__initfunc(int init_module(void))
+{
+ int i;
+
+ for (i = 0; (i < NR_PORTS) && (mode[i]); i++) {
+ baycom_ports[i].mode = mode[i];
+ baycom_ports[i].iobase = iobase[i];
+ }
+ if (i < NR_PORTS-1)
+ baycom_ports[i+1].mode = NULL;
+ return baycom_epp_init();
+}
+
+/* --------------------------------------------------------------------- */
+
+void cleanup_module(void)
+{
+ struct device *dev;
+ struct baycom_state *bc;
+ int i;
+
+ for(i = 0; i < NR_PORTS; i++) {
+ dev = baycom_device+i;
+ bc = (struct baycom_state *)dev->priv;
+ if (bc) {
+ if (bc->magic == BAYCOM_MAGIC) {
+ unregister_netdev(dev);
+ kfree(dev->priv);
+ } else
+ printk(paranoia_str, "cleanup_module");
+ }
+ }
+}
+
+#else /* MODULE */
+/* --------------------------------------------------------------------- */
+/*
+ * format: baycom=io,mode
+ * mode: epp
+ */
+
+__initfunc(void baycom_epp_setup(char *str, int *ints))
+{
+ int i;
+
+ for (i = 0; (i < NR_PORTS) && (baycom_ports[i].mode); i++);
+ if ((i >= NR_PORTS) || (ints[0] < 1)) {
+ printk(KERN_INFO "%s: too many or invalid interface "
+ "specifications\n", bc_drvname);
+ return;
+ }
+ baycom_ports[i].mode = str;
+ baycom_ports[i].irq = ints[1];
+ if (i < NR_PORTS-1)
+ baycom_ports[i+1].mode = NULL;
+}
+
+#endif /* MODULE */
+/* --------------------------------------------------------------------- */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov