baycom_ser_fdx.c
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- /*****************************************************************************/
- /*
- * baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver.
- *
- * Copyright (C) 1996-2000 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.
- *
- *
- * Supported modems
- *
- * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only
- * of a modulator/demodulator chip, usually a TI TCM3105. The computer
- * is responsible for regenerating the receiver bit clock, as well as
- * for handling the HDLC protocol. The modem connects to a serial port,
- * hence the name. Since the serial port is not used as an async serial
- * port, the kernel driver for serial ports cannot be used, and this
- * driver only supports standard serial hardware (8250, 16450, 16550A)
- *
- * This modem usually draws its supply current out of the otherwise unused
- * TXD pin of the serial port. Thus a contignuous stream of 0x00-bytes
- * is transmitted to achieve a positive supply voltage.
- *
- * hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine
- * in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is
- * externally supplied. So there's no need to provide the 0x00-byte-stream
- * when receiving or idle, which drastically reduces interrupt load.
- *
- * Command line options (insmod command line)
- *
- * mode ser# hardware DCD
- * ser#* software DCD
- * ser#+ hardware DCD, inverted signal at DCD pin
- * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
- * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
- * baud baud rate (between 300 and 4800)
- * irq interrupt line of the port; common values are 4,3
- *
- *
- * History:
- * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
- * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
- * 0.3 26.04.1997 init code/data tagged
- * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
- * 0.5 11.11.1997 ser12/par96 split into separate files
- * 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer:
- * reduced interrupt load in transmit case
- * reworked receiver
- * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
- * 0.8 10.08.1999 use module_init/module_exit
- * 0.9 12.02.2000 adapted to softnet driver interface
- * 0.10 03.07.2000 fix interface name handling
- */
- /*****************************************************************************/
- #include <linux/version.h>
- #include <linux/module.h>
- #include <linux/ioport.h>
- #include <linux/string.h>
- #include <linux/init.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <linux/hdlcdrv.h>
- #include <linux/baycom.h>
- /* --------------------------------------------------------------------- */
- #define BAYCOM_DEBUG
- /* --------------------------------------------------------------------- */
- static const char bc_drvname[] = "baycom_ser_fdx";
- static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WAn"
- KERN_INFO "baycom_ser_fdx: version 0.10 compiled " __TIME__ " " __DATE__ "n";
- /* --------------------------------------------------------------------- */
- #define NR_PORTS 4
- static struct net_device baycom_device[NR_PORTS];
- /* --------------------------------------------------------------------- */
- #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 SER12_EXTENT 8
- /* ---------------------------------------------------------------------- */
- /*
- * Information that need to be kept for each board.
- */
- struct baycom_state {
- struct hdlcdrv_state hdrv;
- unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout;
- int opt_dcd;
- struct modem_state {
- unsigned char flags;
- unsigned char ptt;
- unsigned int shreg;
- struct modem_state_ser12 {
- unsigned char tx_bit;
- unsigned char last_rxbit;
- int dcd_sum0, dcd_sum1, dcd_sum2;
- int dcd_time;
- unsigned int pll_time;
- unsigned int txshreg;
- } ser12;
- } modem;
- #ifdef BAYCOM_DEBUG
- struct debug_vals {
- unsigned long last_jiffies;
- unsigned cur_intcnt;
- unsigned last_intcnt;
- int cur_pllcorr;
- int last_pllcorr;
- } debug_vals;
- #endif /* BAYCOM_DEBUG */
- };
- /* --------------------------------------------------------------------- */
- 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 */
- }
- /* --------------------------------------------------------------------- */
- /*
- * ===================== SER12 specific routines =========================
- */
- /* --------------------------------------------------------------------- */
- static inline void ser12_set_divisor(struct net_device *dev,
- unsigned int divisor)
- {
- outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
- outb(divisor, DLL(dev->base_addr));
- outb(divisor >> 8, DLM(dev->base_addr));
- outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- /*
- * it is important not to set the divider while transmitting;
- * this reportedly makes some UARTs generating interrupts
- * in the hundredthousands per second region
- * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
- */
- }
- /* --------------------------------------------------------------------- */
- #if 0
- extern inline unsigned int hweight16(unsigned int w)
- __attribute__ ((unused));
- extern inline unsigned int hweight8(unsigned int w)
- __attribute__ ((unused));
- extern inline unsigned int hweight16(unsigned int w)
- {
- unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555);
- res = (res & 0x3333) + ((res >> 2) & 0x3333);
- res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F);
- return (res & 0x00FF) + ((res >> 8) & 0x00FF);
- }
- extern inline unsigned int hweight8(unsigned int w)
- {
- unsigned short res = (w & 0x55) + ((w >> 1) & 0x55);
- res = (res & 0x33) + ((res >> 2) & 0x33);
- return (res & 0x0F) + ((res >> 4) & 0x0F);
- }
- #endif
- /* --------------------------------------------------------------------- */
- static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs)
- {
- int timediff;
- int bdus8 = bc->baud_us >> 3;
- int bdus4 = bc->baud_us >> 2;
- int bdus2 = bc->baud_us >> 1;
- timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time;
- while (timediff >= 500000)
- timediff -= 1000000;
- while (timediff >= bdus2) {
- timediff -= bc->baud_us;
- bc->modem.ser12.pll_time += bc->baud_us;
- bc->modem.ser12.dcd_time--;
- /* first check if there is room to add a bit */
- if (bc->modem.shreg & 1) {
- hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff);
- bc->modem.shreg = 0x10000;
- }
- /* add a one bit */
- bc->modem.shreg >>= 1;
- }
- if (bc->modem.ser12.dcd_time <= 0) {
- if (!bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
- bc->modem.ser12.dcd_sum1 +
- bc->modem.ser12.dcd_sum2) < 0);
- bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
- bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
- bc->modem.ser12.dcd_sum0 = 2; /* slight bias */
- bc->modem.ser12.dcd_time += 120;
- }
- if (bc->modem.ser12.last_rxbit != curs) {
- bc->modem.ser12.last_rxbit = curs;
- bc->modem.shreg |= 0x10000;
- /* adjust the PLL */
- if (timediff > 0)
- bc->modem.ser12.pll_time += bdus8;
- else
- bc->modem.ser12.pll_time += 1000000 - bdus8;
- /* update DCD */
- if (abs(timediff) > bdus4)
- bc->modem.ser12.dcd_sum0 += 4;
- else
- bc->modem.ser12.dcd_sum0--;
- #ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr = timediff;
- #endif /* BAYCOM_DEBUG */
- }
- while (bc->modem.ser12.pll_time >= 1000000)
- bc->modem.ser12.pll_time -= 1000000;
- }
- /* --------------------------------------------------------------------- */
- static void ser12_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *)dev_id;
- struct baycom_state *bc = (struct baycom_state *)dev->priv;
- struct timeval tv;
- unsigned char iir, msr;
- unsigned int txcount = 0;
- if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
- return;
- /* fast way out for shared irq */
- if ((iir = inb(IIR(dev->base_addr))) & 1)
- return;
- /* get current time */
- do_gettimeofday(&tv);
- msr = inb(MSR(dev->base_addr));
- /* delta DCD */
- if ((msr & 8) && bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
- do {
- switch (iir & 6) {
- case 6:
- inb(LSR(dev->base_addr));
- break;
-
- case 4:
- inb(RBR(dev->base_addr));
- break;
-
- case 2:
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- baycom_int_freq(bc);
- txcount++;
- /*
- * first output the last bit (!) then call HDLC transmitter,
- * since this may take quite long
- */
- if (bc->modem.ptt)
- outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
- else
- outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
- break;
-
- default:
- msr = inb(MSR(dev->base_addr));
- /* delta DCD */
- if ((msr & 8) && bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
- break;
- }
- iir = inb(IIR(dev->base_addr));
- } while (!(iir & 1));
- ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */
- if (bc->modem.ptt && txcount) {
- if (bc->modem.ser12.txshreg <= 1) {
- bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
- if (!hdlcdrv_ptt(&bc->hdrv)) {
- ser12_set_divisor(dev, 115200/100/8);
- bc->modem.ptt = 0;
- goto end_transmit;
- }
- }
- bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1));
- bc->modem.ser12.txshreg >>= 1;
- }
- end_transmit:
- __sti();
- if (!bc->modem.ptt && txcount) {
- hdlcdrv_arbitrate(dev, &bc->hdrv);
- if (hdlcdrv_ptt(&bc->hdrv)) {
- ser12_set_divisor(dev, bc->baud_uartdiv);
- bc->modem.ser12.txshreg = 1;
- bc->modem.ptt = 1;
- }
- }
- hdlcdrv_transmitter(dev, &bc->hdrv);
- hdlcdrv_receiver(dev, &bc->hdrv);
- __cli();
- }
- /* --------------------------------------------------------------------- */
- 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 ser12_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;
- }
- /* --------------------------------------------------------------------- */
- static int ser12_open(struct net_device *dev)
- {
- struct baycom_state *bc = (struct baycom_state *)dev->priv;
- enum uart u;
- if (!dev || !bc)
- return -ENXIO;
- if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
- dev->irq < 2 || dev->irq > 15)
- return -ENXIO;
- if (bc->baud < 300 || bc->baud > 4800)
- return -EINVAL;
- if (check_region(dev->base_addr, SER12_EXTENT))
- return -EACCES;
- memset(&bc->modem, 0, sizeof(bc->modem));
- bc->hdrv.par.bitrate = bc->baud;
- bc->baud_us = 1000000/bc->baud;
- bc->baud_uartdiv = (115200/8)/bc->baud;
- if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown)
- return -EIO;
- outb(0, FCR(dev->base_addr)); /* disable FIFOs */
- outb(0x0d, MCR(dev->base_addr));
- outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, ser12_interrupt, SA_INTERRUPT | SA_SHIRQ,
- "baycom_ser_fdx", dev))
- return -EBUSY;
- request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx");
- /*
- * set the SIO to 6 Bits/character; during receive,
- * the baud rate is set to produce 100 ints/sec
- * to feed the channel arbitration process,
- * during transmit to baud ints/sec to run
- * the transmitter
- */
- ser12_set_divisor(dev, 115200/100/8);
- /*
- * enable transmitter empty interrupt and modem status interrupt
- */
- outb(0x0a, IER(dev->base_addr));
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- hdlcdrv_setdcd(&bc->hdrv, 0);
- printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %sn",
- bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]);
- MOD_INC_USE_COUNT;
- return 0;
- }
- /* --------------------------------------------------------------------- */
- static int ser12_close(struct net_device *dev)
- {
- struct baycom_state *bc = (struct baycom_state *)dev->priv;
- if (!dev || !bc)
- return -EINVAL;
- /*
- * disable interrupts
- */
- outb(0, IER(dev->base_addr));
- outb(1, MCR(dev->base_addr));
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, SER12_EXTENT);
- printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %un",
- bc_drvname, dev->base_addr, dev->irq);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- /* --------------------------------------------------------------------- */
- /*
- * ===================== hdlcdrv driver interface =========================
- */
- /* --------------------------------------------------------------------- */
- static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr,
- struct hdlcdrv_ioctl *hi, int cmd);
- /* --------------------------------------------------------------------- */
- static struct hdlcdrv_ops ser12_ops = {
- bc_drvname,
- bc_drvinfo,
- ser12_open,
- ser12_close,
- baycom_ioctl
- };
- /* --------------------------------------------------------------------- */
- static int baycom_setmode(struct baycom_state *bc, const char *modestr)
- {
- unsigned int baud;
- if (!strncmp(modestr, "ser", 3)) {
- baud = simple_strtoul(modestr+3, NULL, 10);
- if (baud >= 3 && baud <= 48)
- bc->baud = baud*100;
- }
- if (strchr(modestr, '*'))
- bc->opt_dcd = 0;
- else if (strchr(modestr, '+'))
- bc->opt_dcd = -1;
- else
- bc->opt_dcd = 1;
- return 0;
- }
- /* --------------------------------------------------------------------- */
- static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr,
- struct hdlcdrv_ioctl *hi, int cmd)
- {
- struct baycom_state *bc;
- struct baycom_ioctl bi;
- int cmd2;
- if (!dev || !dev->priv ||
- ((struct baycom_state *)dev->priv)->hdrv.magic != HDLCDRV_MAGIC) {
- printk(KERN_ERR "bc_ioctl: invalid device structn");
- return -EINVAL;
- }
- bc = (struct baycom_state *)dev->priv;
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
- if (get_user(cmd2, (int *)ifr->ifr_data))
- return -EFAULT;
- switch (hi->cmd) {
- default:
- break;
- case HDLCDRVCTL_GETMODE:
- sprintf(hi->data.modename, "ser%u", bc->baud / 100);
- if (bc->opt_dcd <= 0)
- strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+");
- if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
- case HDLCDRVCTL_SETMODE:
- if (netif_running(dev) || !capable(CAP_NET_ADMIN))
- return -EACCES;
- hi->data.modename[sizeof(hi->data.modename)-1] = ' ';
- return baycom_setmode(bc, hi->data.modename);
- case HDLCDRVCTL_MODELIST:
- strcpy(hi->data.modename, "ser12,ser3,ser24");
- if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
- case HDLCDRVCTL_MODEMPARMASK:
- return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
- }
- if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi)))
- return -EFAULT;
- switch (bi.cmd) {
- default:
- return -ENOIOCTLCMD;
- #ifdef BAYCOM_DEBUG
- case BAYCOMCTL_GETDEBUG:
- bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
- bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
- bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
- break;
- #endif /* BAYCOM_DEBUG */
- }
- if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
- }
- /* --------------------------------------------------------------------- */
- /*
- * command line settable parameters
- */
- static char *mode[NR_PORTS] = { "ser12*", };
- static int iobase[NR_PORTS] = { 0x3f8, };
- static int irq[NR_PORTS] = { 4, };
- static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 };
- MODULE_PARM(mode, "1-" __MODULE_STRING(NR_PORTS) "s");
- MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
- MODULE_PARM(iobase, "1-" __MODULE_STRING(NR_PORTS) "i");
- MODULE_PARM_DESC(iobase, "baycom io base address");
- MODULE_PARM(irq, "1-" __MODULE_STRING(NR_PORTS) "i");
- MODULE_PARM_DESC(irq, "baycom irq number");
- MODULE_PARM(baud, "1-" __MODULE_STRING(NR_PORTS) "i");
- MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)");
- MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
- MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver");
- MODULE_LICENSE("GPL");
- /* --------------------------------------------------------------------- */
- static int __init init_baycomserfdx(void)
- {
- int i, j, found = 0;
- char set_hw = 1;
- struct baycom_state *bc;
- printk(bc_drvinfo);
- /*
- * register net devices
- */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device+i;
- char ifname[IFNAMSIZ];
- sprintf(ifname, "bcsf%d", i);
- if (!mode[i])
- set_hw = 0;
- if (!set_hw)
- iobase[i] = irq[i] = 0;
- j = hdlcdrv_register_hdlcdrv(dev, &ser12_ops, sizeof(struct baycom_state),
- ifname, iobase[i], irq[i], 0);
- if (!j) {
- bc = (struct baycom_state *)dev->priv;
- if (set_hw && baycom_setmode(bc, mode[i]))
- set_hw = 0;
- bc->baud = baud[i];
- found++;
- } else {
- printk(KERN_WARNING "%s: cannot register net devicen",
- bc_drvname);
- }
- }
- if (!found)
- return -ENXIO;
- return 0;
- }
- static void __exit cleanup_baycomserfdx(void)
- {
- int i;
- for(i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device+i;
- struct baycom_state *bc = (struct baycom_state *)dev->priv;
- if (bc) {
- if (bc->hdrv.magic != HDLCDRV_MAGIC)
- printk(KERN_ERR "baycom: invalid magic in "
- "cleanup_modulen");
- else
- hdlcdrv_unregister_hdlcdrv(dev);
- }
- }
- }
- module_init(init_baycomserfdx);
- module_exit(cleanup_baycomserfdx);
- /* --------------------------------------------------------------------- */
- #ifndef MODULE
- /*
- * format: baycom_ser_fdx=io,irq,mode
- * mode: ser# hardware DCD
- * ser#* software DCD
- * ser#+ hardware DCD, inverted signal at DCD pin
- * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
- */
- static int __init baycom_ser_fdx_setup(char *str)
- {
- static unsigned nr_dev;
- int ints[4];
- if (nr_dev >= NR_PORTS)
- return 0;
- str = get_options(str, 4, ints);
- if (ints[0] < 2)
- return 0;
- mode[nr_dev] = str;
- iobase[nr_dev] = ints[1];
- irq[nr_dev] = ints[2];
- if (ints[0] >= 3)
- baud[nr_dev] = ints[3];
- nr_dev++;
- return 1;
- }
- __setup("baycom_ser_fdx=", baycom_ser_fdx_setup);
- #endif /* MODULE */
- /* --------------------------------------------------------------------- */