/*****************************************************************************/
|
|
/*
|
* 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 contiguous 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/capability.h>
|
#include <linux/module.h>
|
#include <linux/ioport.h>
|
#include <linux/string.h>
|
#include <linux/init.h>
|
#include <linux/interrupt.h>
|
#include <linux/hdlcdrv.h>
|
#include <linux/baycom.h>
|
#include <linux/jiffies.h>
|
#include <linux/time64.h>
|
|
#include <linux/uaccess.h>
|
#include <asm/io.h>
|
#include <asm/irq.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/AE4WA\n"
|
"baycom_ser_fdx: version 0.10\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 inline void 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 (time_after_eq(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
|
static inline unsigned int hweight16(unsigned int w)
|
__attribute__ ((unused));
|
static inline unsigned int hweight8(unsigned int w)
|
__attribute__ ((unused));
|
|
static 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);
|
}
|
|
static 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 timespec64 *ts, 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 + ts->tv_nsec / NSEC_PER_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 irqreturn_t ser12_interrupt(int irq, void *dev_id)
|
{
|
struct net_device *dev = (struct net_device *)dev_id;
|
struct baycom_state *bc = netdev_priv(dev);
|
struct timespec64 ts;
|
unsigned char iir, msr;
|
unsigned int txcount = 0;
|
|
if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
|
return IRQ_NONE;
|
/* fast way out for shared irq */
|
if ((iir = inb(IIR(dev->base_addr))) & 1)
|
return IRQ_NONE;
|
/* get current time */
|
ktime_get_ts64(&ts);
|
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, &ts, 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:
|
local_irq_enable();
|
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);
|
local_irq_disable();
|
return IRQ_HANDLED;
|
}
|
|
/* --------------------------------------------------------------------- */
|
|
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 = netdev_priv(dev);
|
enum uart u;
|
|
if (!dev || !bc)
|
return -ENXIO;
|
if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT ||
|
dev->irq < 2 || dev->irq > nr_irqs) {
|
printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) "
|
"or irq (2 <= irq <= %d)\n",
|
0xffff-SER12_EXTENT, nr_irqs);
|
return -ENXIO;
|
}
|
if (bc->baud < 300 || bc->baud > 4800) {
|
printk(KERN_INFO "baycom_ser_fdx: invalid baudrate "
|
"(300...4800)\n");
|
return -EINVAL;
|
}
|
if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) {
|
printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n",
|
dev->base_addr);
|
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){
|
release_region(dev->base_addr, SER12_EXTENT);
|
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, IRQF_SHARED,
|
"baycom_ser_fdx", dev)) {
|
release_region(dev->base_addr, SER12_EXTENT);
|
return -EBUSY;
|
}
|
/*
|
* 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 %s\n",
|
bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]);
|
return 0;
|
}
|
|
/* --------------------------------------------------------------------- */
|
|
static int ser12_close(struct net_device *dev)
|
{
|
struct baycom_state *bc = netdev_priv(dev);
|
|
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 %u\n",
|
bc_drvname, dev->base_addr, dev->irq);
|
return 0;
|
}
|
|
/* --------------------------------------------------------------------- */
|
/*
|
* ===================== hdlcdrv driver interface =========================
|
*/
|
|
/* --------------------------------------------------------------------- */
|
|
static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr,
|
struct hdlcdrv_ioctl *hi, int cmd);
|
|
/* --------------------------------------------------------------------- */
|
|
static const struct hdlcdrv_ops ser12_ops = {
|
.drvname = bc_drvname,
|
.drvinfo = bc_drvinfo,
|
.open = ser12_open,
|
.close = ser12_close,
|
.ioctl = 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;
|
|
if (!dev)
|
return -EINVAL;
|
|
bc = netdev_priv(dev);
|
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
|
|
if (cmd != SIOCDEVPRIVATE)
|
return -ENOIOCTLCMD;
|
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] = '\0';
|
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_param_array(mode, charp, NULL, 0);
|
MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
|
module_param_hw_array(iobase, int, ioport, NULL, 0);
|
MODULE_PARM_DESC(iobase, "baycom io base address");
|
module_param_hw_array(irq, int, irq, NULL, 0);
|
MODULE_PARM_DESC(irq, "baycom irq number");
|
module_param_array(baud, int, NULL, 0);
|
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, found = 0;
|
char set_hw = 1;
|
|
printk(bc_drvinfo);
|
/*
|
* register net devices
|
*/
|
for (i = 0; i < NR_PORTS; i++) {
|
struct net_device *dev;
|
struct baycom_state *bc;
|
char ifname[IFNAMSIZ];
|
|
sprintf(ifname, "bcsf%d", i);
|
|
if (!mode[i])
|
set_hw = 0;
|
if (!set_hw)
|
iobase[i] = irq[i] = 0;
|
|
dev = hdlcdrv_register(&ser12_ops,
|
sizeof(struct baycom_state),
|
ifname, iobase[i], irq[i], 0);
|
if (IS_ERR(dev))
|
break;
|
|
bc = netdev_priv(dev);
|
if (set_hw && baycom_setmode(bc, mode[i]))
|
set_hw = 0;
|
bc->baud = baud[i];
|
found++;
|
baycom_device[i] = dev;
|
}
|
|
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];
|
if (dev)
|
hdlcdrv_unregister(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 */
|
/* --------------------------------------------------------------------- */
|
