Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 740 insertions, 0 deletions

diff --git a/drivers/net/hamradio/baycom_ser_hdx.c b/drivers/net/hamradio/baycom_ser_hdx.c
new file mode 100644
index 000000000000..eead85d00962
--- /dev/null
+++ b/drivers/net/hamradio/baycom_ser_hdx.c
@@ -0,0 +1,740 @@
+/*****************************************************************************/
+
+/*
+ *      baycom_ser_hdx.c  -- baycom ser12 halfduplex 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)
+ *
+ *
+ *  Command line options (insmod command line)
+ *
+ *  mode     ser12    hardware DCD
+ *           ser12*   software DCD
+ *           ser12@   hardware/software DCD, i.e. no explicit DCD signal but hardware
+ *                    mutes audio input to the modem
+ *           ser12+   hardware DCD, inverted signal at DCD pin
+ *  iobase   base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
+ *  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  14.04.1998  cleanups
+ *   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/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_hdx";
+static const char bc_drvinfo[] = KERN_INFO "baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
+KERN_INFO "baycom_ser_hdx: 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;
+
+        int opt_dcd;
+
+        struct modem_state {
+                short arb_divider;
+                unsigned char flags;
+                unsigned int shreg;
+                struct modem_state_ser12 {
+                        unsigned char tx_bit;
+                        int dcd_sum0, dcd_sum1, dcd_sum2;
+                        unsigned char last_sample;
+                        unsigned char last_rxbit;
+                        unsigned int dcd_shreg;
+                        unsigned int dcd_time;
+                        unsigned int bit_pll;
+                        unsigned char interm_sample;
+                } 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 ((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 char divisor)
+{
+        outb(0x81, LCR(dev->base_addr));        /* DLAB = 1 */
+        outb(divisor, DLL(dev->base_addr));
+        outb(0, 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)
+         */
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * must call the TX arbitrator every 10ms
+ */
+#define SER12_ARB_DIVIDER(bc)  (bc->opt_dcd ? 24 : 36)
+                               
+#define SER12_DCD_INTERVAL(bc) (bc->opt_dcd ? 12 : 240)
+
+static inline void ser12_tx(struct net_device *dev, struct baycom_state *bc)
+{
+        /* one interrupt per channel bit */
+        ser12_set_divisor(dev, 12);
+        /*
+         * first output the last bit (!) then call HDLC transmitter,
+         * since this may take quite long
+         */
+        outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
+        if (bc->modem.shreg <= 1)
+                bc->modem.shreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
+        bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^
+                                   (bc->modem.shreg & 1));
+        bc->modem.shreg >>= 1;
+}
+
+/* --------------------------------------------------------------------- */
+
+static inline void ser12_rx(struct net_device *dev, struct baycom_state *bc)
+{
+        unsigned char cur_s;
+        /*
+         * do demodulator
+         */
+        cur_s = inb(MSR(dev->base_addr)) & 0x10;        /* the CTS line */
+        hdlcdrv_channelbit(&bc->hdrv, cur_s);
+        bc->modem.ser12.dcd_shreg = (bc->modem.ser12.dcd_shreg << 1) |
+                (cur_s != bc->modem.ser12.last_sample);
+        bc->modem.ser12.last_sample = cur_s;
+        if(bc->modem.ser12.dcd_shreg & 1) {
+                if (!bc->opt_dcd) {
+                        unsigned int dcdspos, dcdsneg;
+
+                        dcdspos = dcdsneg = 0;
+                        dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
+                        if (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
+                                dcdspos += 2;
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
+
+                        bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
+                } else
+                        bc->modem.ser12.dcd_sum0--;
+        }
+        if(!bc->modem.ser12.dcd_time) {
+                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;
+                /* offset to ensure DCD off on silent input */
+                bc->modem.ser12.dcd_sum0 = 2;
+                bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
+        }
+        bc->modem.ser12.dcd_time--;
+        if (!bc->opt_dcd) {
+                /*
+                 * PLL code for the improved software DCD algorithm
+                 */
+                if (bc->modem.ser12.interm_sample) {
+                        /*
+                         * intermediate sample; set timing correction to normal
+                         */
+                        ser12_set_divisor(dev, 4);
+                } else {
+                        /*
+                         * do PLL correction and call HDLC receiver
+                         */
+                        switch (bc->modem.ser12.dcd_shreg & 7) {
+                        case 1: /* transition too late */
+                                ser12_set_divisor(dev, 5);
+#ifdef BAYCOM_DEBUG
+                                bc->debug_vals.cur_pllcorr++;
+#endif /* BAYCOM_DEBUG */
+                                break;
+                        case 4: /* transition too early */
+                                ser12_set_divisor(dev, 3);
+#ifdef BAYCOM_DEBUG
+                                bc->debug_vals.cur_pllcorr--;
+#endif /* BAYCOM_DEBUG */
+                                break;
+                        default:
+                                ser12_set_divisor(dev, 4);
+                                break;
+                        }
+                        bc->modem.shreg >>= 1;
+                        if (bc->modem.ser12.last_sample ==
+                            bc->modem.ser12.last_rxbit)
+                                bc->modem.shreg |= 0x10000;
+                        bc->modem.ser12.last_rxbit =
+                                bc->modem.ser12.last_sample;
+                }
+                if (++bc->modem.ser12.interm_sample >= 3)
+                        bc->modem.ser12.interm_sample = 0;
+                /*
+                 * DCD stuff
+                 */
+                if (bc->modem.ser12.dcd_shreg & 1) {
+                        unsigned int dcdspos, dcdsneg;
+
+                        dcdspos = dcdsneg = 0;
+                        dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
+                        dcdspos += (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
+                                << 1;
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
+                        dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
+
+                        bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
+                }
+        } else {
+                /*
+                 * PLL algorithm for the hardware squelch DCD algorithm
+                 */
+                if (bc->modem.ser12.interm_sample) {
+                        /*
+                         * intermediate sample; set timing correction to normal
+                         */
+                        ser12_set_divisor(dev, 6);
+                } else {
+                        /*
+                         * do PLL correction and call HDLC receiver
+                         */
+                        switch (bc->modem.ser12.dcd_shreg & 3) {
+                        case 1: /* transition too late */
+                                ser12_set_divisor(dev, 7);
+#ifdef BAYCOM_DEBUG
+                                bc->debug_vals.cur_pllcorr++;
+#endif /* BAYCOM_DEBUG */
+                                break;
+                        case 2: /* transition too early */
+                                ser12_set_divisor(dev, 5);
+#ifdef BAYCOM_DEBUG
+                                bc->debug_vals.cur_pllcorr--;
+#endif /* BAYCOM_DEBUG */
+                                break;
+                        default:
+                                ser12_set_divisor(dev, 6);
+                                break;
+                        }
+                        bc->modem.shreg >>= 1;
+                        if (bc->modem.ser12.last_sample ==
+                            bc->modem.ser12.last_rxbit)
+                                bc->modem.shreg |= 0x10000;
+                        bc->modem.ser12.last_rxbit =
+                                bc->modem.ser12.last_sample;
+                }
+                bc->modem.ser12.interm_sample = !bc->modem.ser12.interm_sample;
+                /*
+                 * DCD stuff
+                 */
+                bc->modem.ser12.dcd_sum0 -= (bc->modem.ser12.dcd_shreg & 1);
+        }
+        outb(0x0d, MCR(dev->base_addr));                /* transmitter off */
+        if (bc->modem.shreg & 1) {
+                hdlcdrv_putbits(&bc->hdrv, bc->modem.shreg >> 1);
+                bc->modem.shreg = 0x10000;
+        }
+        if(!bc->modem.ser12.dcd_time) {
+                if (bc->opt_dcd & 1) 
+                        hdlcdrv_setdcd(&bc->hdrv, !((inb(MSR(dev->base_addr)) ^ bc->opt_dcd) & 0x80));
+                else
+                        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;
+                /* offset to ensure DCD off on silent input */
+                bc->modem.ser12.dcd_sum0 = 2;
+                bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
+        }
+        bc->modem.ser12.dcd_time--;
+}
+
+/* --------------------------------------------------------------------- */
+
+static irqreturn_t ser12_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct net_device *dev = (struct net_device *)dev_id;
+        struct baycom_state *bc = netdev_priv(dev);
+        unsigned char iir;
+
+        if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
+                return IRQ_NONE;
+        /* fast way out */
+        if ((iir = inb(IIR(dev->base_addr))) & 1)
+                return IRQ_NONE;
+        baycom_int_freq(bc);
+        do {
+                switch (iir & 6) {
+                case 6:
+                        inb(LSR(dev->base_addr));
+                        break;
+                        
+                case 4:
+                        inb(RBR(dev->base_addr));
+                        break;
+                        
+                case 2:
+                        /*
+                         * check if transmitter active
+                         */
+                        if (hdlcdrv_ptt(&bc->hdrv))
+                                ser12_tx(dev, bc);
+                        else {
+                                ser12_rx(dev, bc);
+                                bc->modem.arb_divider--;
+                        }
+                        outb(0x00, THR(dev->base_addr));
+                        break;
+                        
+                default:
+                        inb(MSR(dev->base_addr));
+                        break;
+                }
+                iir = inb(IIR(dev->base_addr));
+        } while (!(iir & 1));
+        if (bc->modem.arb_divider <= 0) {
+                bc->modem.arb_divider = SER12_ARB_DIVIDER(bc);
+                local_irq_enable();
+                hdlcdrv_arbitrate(dev, &bc->hdrv);
+        }
+        local_irq_enable();
+        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 > 0x1000-SER12_EXTENT ||
+            dev->irq < 2 || dev->irq > 15)
+                return -ENXIO;
+        if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser12"))
+                return -EACCES;
+        memset(&bc->modem, 0, sizeof(bc->modem));
+        bc->hdrv.par.bitrate = 1200;
+        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, SA_INTERRUPT | SA_SHIRQ,
+                        "baycom_ser12", dev)) {
+                release_region(dev->base_addr, SER12_EXTENT);       
+                return -EBUSY;
+        }
+        /*
+         * enable transmitter empty interrupt
+         */
+        outb(2, IER(dev->base_addr));
+        /*
+         * set the SIO to 6 Bits/character and 19200 or 28800 baud, so that
+         * we get exactly (hopefully) 2 or 3 interrupts per radio symbol,
+         * depending on the usage of the software DCD routine
+         */
+        ser12_set_divisor(dev, bc->opt_dcd ? 6 : 4);
+        printk(KERN_INFO "%s: ser12 at iobase 0x%lx irq %u uart %s\n", 
+               bc_drvname, dev->base_addr, dev->irq, 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 ser12 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 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)
+{
+        if (strchr(modestr, '*'))
+                bc->opt_dcd = 0;
+        else if (strchr(modestr, '+'))
+                bc->opt_dcd = -1;
+        else if (strchr(modestr, '@'))
+                bc->opt_dcd = -2;
+        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:
+                strcpy(hi->data.modename, "ser12");
+                if (bc->opt_dcd <= 0)
+                        strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : (bc->opt_dcd == -2) ? "@" : "+");
+                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");
+                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, };
+
+module_param_array(mode, charp, NULL, 0);
+MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
+module_param_array(iobase, int, NULL, 0);
+MODULE_PARM_DESC(iobase, "baycom io base address");
+module_param_array(irq, int, NULL, 0);
+MODULE_PARM_DESC(irq, "baycom irq number");
+
+MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
+MODULE_DESCRIPTION("Baycom ser12 half duplex amateur radio modem driver");
+MODULE_LICENSE("GPL");
+
+/* --------------------------------------------------------------------- */
+
+static int __init init_baycomserhdx(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, "bcsh%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;
+                found++;
+                baycom_device[i] = dev;
+        }
+
+        if (!found)
+                return -ENXIO;
+        return 0;
+}
+
+static void __exit cleanup_baycomserhdx(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_baycomserhdx);
+module_exit(cleanup_baycomserhdx);
+
+/* --------------------------------------------------------------------- */
+
+#ifndef MODULE
+
+/*
+ * format: baycom_ser_hdx=io,irq,mode
+ * mode: ser12    hardware DCD
+ *       ser12*   software DCD
+ *       ser12@   hardware/software DCD, i.e. no explicit DCD signal but hardware
+ *                mutes audio input to the modem
+ *       ser12+   hardware DCD, inverted signal at DCD pin
+ */
+
+static int __init baycom_ser_hdx_setup(char *str)
+{
+        static unsigned nr_dev;
+        int ints[3];
+
+        if (nr_dev >= NR_PORTS)
+                return 0;
+        str = get_options(str, 3, ints);
+        if (ints[0] < 2)
+                return 0;
+        mode[nr_dev] = str;
+        iobase[nr_dev] = ints[1];
+        irq[nr_dev] = ints[2];
+        nr_dev++;
+        return 1;
+}
+
+__setup("baycom_ser_hdx=", baycom_ser_hdx_setup);
+
+#endif /* MODULE */
+/* --------------------------------------------------------------------- */