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, 657 insertions, 0 deletions

diff --git a/drivers/isdn/hisax/elsa_ser.c b/drivers/isdn/hisax/elsa_ser.c
new file mode 100644
index 000000000000..689c83395693
--- /dev/null
+++ b/drivers/isdn/hisax/elsa_ser.c
@@ -0,0 +1,657 @@
+/* $Id: elsa_ser.c,v 2.14.2.3 2004/02/11 13:21:33 keil Exp $
+ *
+ * stuff for the serial modem on ELSA cards
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+
+#define MAX_MODEM_BUF   256
+#define WAKEUP_CHARS    (MAX_MODEM_BUF/2)
+#define RS_ISR_PASS_LIMIT 256
+#define BASE_BAUD ( 1843200 / 16 )
+
+//#define SERIAL_DEBUG_OPEN 1
+//#define SERIAL_DEBUG_INTR 1
+//#define SERIAL_DEBUG_FLOW 1
+#undef SERIAL_DEBUG_OPEN
+#undef SERIAL_DEBUG_INTR
+#undef SERIAL_DEBUG_FLOW
+#undef SERIAL_DEBUG_REG
+//#define SERIAL_DEBUG_REG 1
+
+#ifdef SERIAL_DEBUG_REG
+static u_char deb[32];
+const char *ModemIn[] = {"RBR","IER","IIR","LCR","MCR","LSR","MSR","SCR"};
+const char *ModemOut[] = {"THR","IER","FCR","LCR","MCR","LSR","MSR","SCR"};
+#endif
+
+static char *MInit_1 = "AT&F&C1E0&D2\r\0";
+static char *MInit_2 = "ATL2M1S64=13\r\0";
+static char *MInit_3 = "AT+FCLASS=0\r\0";
+static char *MInit_4 = "ATV1S2=128X1\r\0";
+static char *MInit_5 = "AT\\V8\\N3\r\0";
+static char *MInit_6 = "ATL0M0&G0%E1\r\0";
+static char *MInit_7 = "AT%L1%M0%C3\r\0";
+
+static char *MInit_speed28800 = "AT%G0%B28800\r\0";
+
+static char *MInit_dialout = "ATs7=60 x1 d\r\0";
+static char *MInit_dialin = "ATs7=60 x1 a\r\0";
+
+
+static inline unsigned int serial_in(struct IsdnCardState *cs, int offset)
+{
+#ifdef SERIAL_DEBUG_REG
+        u_int val = inb(cs->hw.elsa.base + 8 + offset);
+        debugl1(cs,"in   %s %02x",ModemIn[offset], val);
+        return(val);
+#else
+        return inb(cs->hw.elsa.base + 8 + offset);
+#endif
+}
+
+static inline unsigned int serial_inp(struct IsdnCardState *cs, int offset)
+{
+#ifdef SERIAL_DEBUG_REG
+#ifdef CONFIG_SERIAL_NOPAUSE_IO
+        u_int val = inb(cs->hw.elsa.base + 8 + offset);
+        debugl1(cs,"inp  %s %02x",ModemIn[offset], val);
+#else
+        u_int val = inb_p(cs->hw.elsa.base + 8 + offset);
+        debugl1(cs,"inP  %s %02x",ModemIn[offset], val);
+#endif
+        return(val);
+#else
+#ifdef CONFIG_SERIAL_NOPAUSE_IO
+        return inb(cs->hw.elsa.base + 8 + offset);
+#else
+        return inb_p(cs->hw.elsa.base + 8 + offset);
+#endif
+#endif
+}
+
+static inline void serial_out(struct IsdnCardState *cs, int offset, int value)
+{
+#ifdef SERIAL_DEBUG_REG
+        debugl1(cs,"out  %s %02x",ModemOut[offset], value);
+#endif
+        outb(value, cs->hw.elsa.base + 8 + offset);
+}
+
+static inline void serial_outp(struct IsdnCardState *cs, int offset,
+                               int value)
+{
+#ifdef SERIAL_DEBUG_REG
+#ifdef CONFIG_SERIAL_NOPAUSE_IO
+        debugl1(cs,"outp %s %02x",ModemOut[offset], value);
+#else
+        debugl1(cs,"outP %s %02x",ModemOut[offset], value);
+#endif
+#endif
+#ifdef CONFIG_SERIAL_NOPAUSE_IO
+        outb(value, cs->hw.elsa.base + 8 + offset);
+#else
+        outb_p(value, cs->hw.elsa.base + 8 + offset);
+#endif
+}
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static void change_speed(struct IsdnCardState *cs, int baud)
+{
+        int     quot = 0, baud_base;
+        unsigned cval, fcr = 0;
+        int     bits;
+
+
+        /* byte size and parity */
+        cval = 0x03; bits = 10;
+        /* Determine divisor based on baud rate */
+        baud_base = BASE_BAUD;
+        quot = baud_base / baud;
+        /* If the quotient is ever zero, default to 9600 bps */
+        if (!quot)
+                quot = baud_base / 9600;
+
+        /* Set up FIFO's */
+        if ((baud_base / quot) < 2400)
+                fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
+        else
+                fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
+        serial_outp(cs, UART_FCR, fcr);
+        /* CTS flow control flag and modem status interrupts */
+        cs->hw.elsa.IER &= ~UART_IER_MSI;
+        cs->hw.elsa.IER |= UART_IER_MSI;
+        serial_outp(cs, UART_IER, cs->hw.elsa.IER);
+
+        debugl1(cs,"modem quot=0x%x", quot);
+        serial_outp(cs, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
+        serial_outp(cs, UART_DLL, quot & 0xff);         /* LS of divisor */
+        serial_outp(cs, UART_DLM, quot >> 8);           /* MS of divisor */
+        serial_outp(cs, UART_LCR, cval);                /* reset DLAB */
+        serial_inp(cs, UART_RX);
+}
+
+static int mstartup(struct IsdnCardState *cs)
+{
+        int     retval=0;
+
+        /*
+         * Clear the FIFO buffers and disable them
+         * (they will be reenabled in change_speed())
+         */
+        serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
+
+        /*
+         * At this point there's no way the LSR could still be 0xFF;
+         * if it is, then bail out, because there's likely no UART
+         * here.
+         */
+        if (serial_inp(cs, UART_LSR) == 0xff) {
+                retval = -ENODEV;
+                goto errout;
+        }
+        
+        /*
+         * Clear the interrupt registers.
+         */
+        (void) serial_inp(cs, UART_RX);
+        (void) serial_inp(cs, UART_IIR);
+        (void) serial_inp(cs, UART_MSR);
+
+        /*
+         * Now, initialize the UART 
+         */
+        serial_outp(cs, UART_LCR, UART_LCR_WLEN8);      /* reset DLAB */
+
+        cs->hw.elsa.MCR = 0;
+        cs->hw.elsa.MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
+        serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
+        
+        /*
+         * Finally, enable interrupts
+         */
+        cs->hw.elsa.IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+        serial_outp(cs, UART_IER, cs->hw.elsa.IER);     /* enable interrupts */
+        
+        /*
+         * And clear the interrupt registers again for luck.
+         */
+        (void)serial_inp(cs, UART_LSR);
+        (void)serial_inp(cs, UART_RX);
+        (void)serial_inp(cs, UART_IIR);
+        (void)serial_inp(cs, UART_MSR);
+
+        cs->hw.elsa.transcnt = cs->hw.elsa.transp = 0;
+        cs->hw.elsa.rcvcnt = cs->hw.elsa.rcvp =0;
+
+        /*
+         * and set the speed of the serial port
+         */
+        change_speed(cs, BASE_BAUD);
+        cs->hw.elsa.MFlag = 1;
+errout:
+        return retval;
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts are disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void mshutdown(struct IsdnCardState *cs)
+{
+
+#ifdef SERIAL_DEBUG_OPEN
+        printk(KERN_DEBUG"Shutting down serial ....");
+#endif
+        
+        /*
+         * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+         * here so the queue might never be waken up
+         */
+
+        cs->hw.elsa.IER = 0;
+        serial_outp(cs, UART_IER, 0x00);        /* disable all intrs */
+        cs->hw.elsa.MCR &= ~UART_MCR_OUT2;
+        
+        /* disable break condition */
+        serial_outp(cs, UART_LCR, serial_inp(cs, UART_LCR) & ~UART_LCR_SBC);
+        
+        cs->hw.elsa.MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
+        serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
+
+        /* disable FIFO's */    
+        serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
+        serial_inp(cs, UART_RX);    /* read data port to reset things */
+        
+#ifdef SERIAL_DEBUG_OPEN
+        printk(" done\n");
+#endif
+}
+
+inline int
+write_modem(struct BCState *bcs) {
+        int ret=0;
+        struct IsdnCardState *cs = bcs->cs;
+        int count, len, fp;
+        
+        if (!bcs->tx_skb)
+                return 0;
+        if (bcs->tx_skb->len <= 0)
+                return 0;
+        len = bcs->tx_skb->len;
+        if (len > MAX_MODEM_BUF - cs->hw.elsa.transcnt)
+                len = MAX_MODEM_BUF - cs->hw.elsa.transcnt;
+        fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
+        fp &= (MAX_MODEM_BUF -1);
+        count = len;
+        if (count > MAX_MODEM_BUF - fp) {
+                count = MAX_MODEM_BUF - fp;
+                memcpy(cs->hw.elsa.transbuf + fp, bcs->tx_skb->data, count);
+                skb_pull(bcs->tx_skb, count);
+                cs->hw.elsa.transcnt += count;
+                ret = count;
+                count = len - count;
+                fp = 0;
+        }
+        memcpy((cs->hw.elsa.transbuf + fp), bcs->tx_skb->data, count);
+        skb_pull(bcs->tx_skb, count);
+        cs->hw.elsa.transcnt += count;
+        ret += count;
+        
+        if (cs->hw.elsa.transcnt && 
+            !(cs->hw.elsa.IER & UART_IER_THRI)) {
+                        cs->hw.elsa.IER |= UART_IER_THRI;
+                serial_outp(cs, UART_IER, cs->hw.elsa.IER);
+        }
+        return(ret);
+}
+
+inline void
+modem_fill(struct BCState *bcs) {
+                
+        if (bcs->tx_skb) {
+                if (bcs->tx_skb->len) {
+                        write_modem(bcs);
+                        return;
+                } else {
+                        if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
+                                (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
+                                u_long  flags;
+                                spin_lock_irqsave(&bcs->aclock, flags);
+                                bcs->ackcnt += bcs->hw.hscx.count;
+                                spin_unlock_irqrestore(&bcs->aclock, flags);
+                                schedule_event(bcs, B_ACKPENDING);
+                        }
+                        dev_kfree_skb_any(bcs->tx_skb);
+                        bcs->tx_skb = NULL;
+                }
+        }
+        if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
+                bcs->hw.hscx.count = 0;
+                test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+                write_modem(bcs);
+        } else {
+                test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+                schedule_event(bcs, B_XMTBUFREADY);
+        }
+}
+
+static inline void receive_chars(struct IsdnCardState *cs,
+                                 int *status)
+{
+        unsigned char ch;
+        struct sk_buff *skb;
+
+        do {
+                ch = serial_in(cs, UART_RX);
+                if (cs->hw.elsa.rcvcnt >= MAX_MODEM_BUF)
+                        break;
+                cs->hw.elsa.rcvbuf[cs->hw.elsa.rcvcnt++] = ch;
+#ifdef SERIAL_DEBUG_INTR
+                printk("DR%02x:%02x...", ch, *status);
+#endif
+                if (*status & (UART_LSR_BI | UART_LSR_PE |
+                               UART_LSR_FE | UART_LSR_OE)) {
+                                        
+#ifdef SERIAL_DEBUG_INTR
+                        printk("handling exept....");
+#endif
+                }
+                *status = serial_inp(cs, UART_LSR);
+        } while (*status & UART_LSR_DR);
+        if (cs->hw.elsa.MFlag == 2) {
+                if (!(skb = dev_alloc_skb(cs->hw.elsa.rcvcnt)))
+                        printk(KERN_WARNING "ElsaSER: receive out of memory\n");
+                else {
+                        memcpy(skb_put(skb, cs->hw.elsa.rcvcnt), cs->hw.elsa.rcvbuf, 
+                                cs->hw.elsa.rcvcnt);
+                        skb_queue_tail(& cs->hw.elsa.bcs->rqueue, skb);
+                }
+                schedule_event(cs->hw.elsa.bcs, B_RCVBUFREADY);
+        } else {
+                char tmp[128];
+                char *t = tmp;
+
+                t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
+                QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
+                debugl1(cs, tmp);
+        }
+        cs->hw.elsa.rcvcnt = 0;
+}
+
+static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
+{
+        int count;
+        
+        debugl1(cs, "transmit_chars: p(%x) cnt(%x)", cs->hw.elsa.transp, 
+                cs->hw.elsa.transcnt);
+        
+        if (cs->hw.elsa.transcnt <= 0) {
+                cs->hw.elsa.IER &= ~UART_IER_THRI;
+                serial_out(cs, UART_IER, cs->hw.elsa.IER);
+                return;
+        }
+        count = 16;
+        do {
+                serial_outp(cs, UART_TX, cs->hw.elsa.transbuf[cs->hw.elsa.transp++]);
+                if (cs->hw.elsa.transp >= MAX_MODEM_BUF)
+                        cs->hw.elsa.transp=0;
+                if (--cs->hw.elsa.transcnt <= 0)
+                        break;
+        } while (--count > 0);
+        if ((cs->hw.elsa.transcnt < WAKEUP_CHARS) && (cs->hw.elsa.MFlag==2))
+                modem_fill(cs->hw.elsa.bcs);
+
+#ifdef SERIAL_DEBUG_INTR
+        printk("THRE...");
+#endif
+        if (intr_done)
+                *intr_done = 0;
+        if (cs->hw.elsa.transcnt <= 0) {
+                cs->hw.elsa.IER &= ~UART_IER_THRI;
+                serial_outp(cs, UART_IER, cs->hw.elsa.IER);
+        }
+}
+
+
+static void rs_interrupt_elsa(int irq, struct IsdnCardState *cs)
+{
+        int status, iir, msr;
+        int pass_counter = 0;
+        
+#ifdef SERIAL_DEBUG_INTR
+        printk("rs_interrupt_single(%d)...", irq);
+#endif
+
+        do {
+                status = serial_inp(cs, UART_LSR);
+                debugl1(cs,"rs LSR %02x", status);
+#ifdef SERIAL_DEBUG_INTR
+                printk("status = %x...", status);
+#endif
+                if (status & UART_LSR_DR)
+                        receive_chars(cs, &status);
+                if (status & UART_LSR_THRE)
+                        transmit_chars(cs, NULL);
+                if (pass_counter++ > RS_ISR_PASS_LIMIT) {
+                        printk("rs_single loop break.\n");
+                        break;
+                }
+                iir = serial_inp(cs, UART_IIR);
+                debugl1(cs,"rs IIR %02x", iir);
+                if ((iir & 0xf) == 0) {
+                        msr = serial_inp(cs, UART_MSR);
+                        debugl1(cs,"rs MSR %02x", msr);
+                }
+        } while (!(iir & UART_IIR_NO_INT));
+#ifdef SERIAL_DEBUG_INTR
+        printk("end.\n");
+#endif
+}
+
+extern int open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs);
+extern void modehscx(struct BCState *bcs, int mode, int bc);
+extern void hscx_l2l1(struct PStack *st, int pr, void *arg);
+
+void
+close_elsastate(struct BCState *bcs)
+{
+        modehscx(bcs, 0, bcs->channel);
+        if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
+                if (bcs->hw.hscx.rcvbuf) {
+                        if (bcs->mode != L1_MODE_MODEM)
+                                kfree(bcs->hw.hscx.rcvbuf);
+                        bcs->hw.hscx.rcvbuf = NULL;
+                }
+                skb_queue_purge(&bcs->rqueue);
+                skb_queue_purge(&bcs->squeue);
+                if (bcs->tx_skb) {
+                        dev_kfree_skb_any(bcs->tx_skb);
+                        bcs->tx_skb = NULL;
+                        test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+                }
+        }
+}
+
+void
+modem_write_cmd(struct IsdnCardState *cs, u_char *buf, int len) {
+        int count, fp;
+        u_char *msg = buf;
+        
+        if (!len)
+                return;
+        if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
+                return;
+        }
+        fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
+        fp &= (MAX_MODEM_BUF -1);
+        count = len;
+        if (count > MAX_MODEM_BUF - fp) {
+                count = MAX_MODEM_BUF - fp;
+                memcpy(cs->hw.elsa.transbuf + fp, msg, count);
+                cs->hw.elsa.transcnt += count;
+                msg += count;
+                count = len - count;
+                fp = 0;
+        }
+        memcpy(cs->hw.elsa.transbuf + fp, msg, count);
+        cs->hw.elsa.transcnt += count;
+        if (cs->hw.elsa.transcnt && 
+            !(cs->hw.elsa.IER & UART_IER_THRI)) {
+                cs->hw.elsa.IER |= UART_IER_THRI;
+                serial_outp(cs, UART_IER, cs->hw.elsa.IER);
+        }
+}
+
+void
+modem_set_init(struct IsdnCardState *cs) {
+        int timeout;
+
+#define RCV_DELAY 20000 
+        modem_write_cmd(cs, MInit_1, strlen(MInit_1));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        modem_write_cmd(cs, MInit_2, strlen(MInit_2));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        modem_write_cmd(cs, MInit_3, strlen(MInit_3));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        modem_write_cmd(cs, MInit_4, strlen(MInit_4));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY );
+        modem_write_cmd(cs, MInit_5, strlen(MInit_5));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        modem_write_cmd(cs, MInit_6, strlen(MInit_6));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        modem_write_cmd(cs, MInit_7, strlen(MInit_7));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+}
+
+void
+modem_set_dial(struct IsdnCardState *cs, int outgoing) {
+        int timeout;
+#define RCV_DELAY 20000 
+
+        modem_write_cmd(cs, MInit_speed28800, strlen(MInit_speed28800));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+        if (outgoing)
+                modem_write_cmd(cs, MInit_dialout, strlen(MInit_dialout));
+        else
+                modem_write_cmd(cs, MInit_dialin, strlen(MInit_dialin));
+        timeout = 1000;
+        while(timeout-- && cs->hw.elsa.transcnt)
+                udelay(1000);
+        debugl1(cs, "msi tout=%d", timeout);
+        udelay(RCV_DELAY);
+}
+
+void
+modem_l2l1(struct PStack *st, int pr, void *arg)
+{
+        struct BCState *bcs = st->l1.bcs;
+        struct sk_buff *skb = arg;
+        u_long flags;
+
+        if (pr == (PH_DATA | REQUEST)) {
+                spin_lock_irqsave(&bcs->cs->lock, flags);
+                if (bcs->tx_skb) {
+                        skb_queue_tail(&bcs->squeue, skb);
+                } else {
+                        bcs->tx_skb = skb;
+                        test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+                        bcs->hw.hscx.count = 0;
+                        write_modem(bcs);
+                }
+                spin_unlock_irqrestore(&bcs->cs->lock, flags);
+        } else if (pr == (PH_ACTIVATE | REQUEST)) {
+                test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
+                st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
+                set_arcofi(bcs->cs, st->l1.bc);
+                mstartup(bcs->cs);
+                modem_set_dial(bcs->cs, test_bit(FLG_ORIG, &st->l2.flag));
+                bcs->cs->hw.elsa.MFlag=2;
+        } else if (pr == (PH_DEACTIVATE | REQUEST)) {
+                test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
+                bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
+                arcofi_fsm(bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
+                interruptible_sleep_on(&bcs->cs->dc.isac.arcofi_wait);
+                bcs->cs->hw.elsa.MFlag=1;
+        } else {
+                printk(KERN_WARNING"ElsaSer: unknown pr %x\n", pr);
+        }
+}
+
+int
+setstack_elsa(struct PStack *st, struct BCState *bcs)
+{
+
+        bcs->channel = st->l1.bc;
+        switch (st->l1.mode) {
+                case L1_MODE_HDLC:
+                case L1_MODE_TRANS:
+                        if (open_hscxstate(st->l1.hardware, bcs))
+                                return (-1);
+                        st->l2.l2l1 = hscx_l2l1;
+                        break;
+                case L1_MODE_MODEM:
+                        bcs->mode = L1_MODE_MODEM;
+                        if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
+                                bcs->hw.hscx.rcvbuf = bcs->cs->hw.elsa.rcvbuf;
+                                skb_queue_head_init(&bcs->rqueue);
+                                skb_queue_head_init(&bcs->squeue);
+                        }
+                        bcs->tx_skb = NULL;
+                        test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+                        bcs->event = 0;
+                        bcs->hw.hscx.rcvidx = 0;
+                        bcs->tx_cnt = 0;
+                        bcs->cs->hw.elsa.bcs = bcs;
+                        st->l2.l2l1 = modem_l2l1;
+                        break;
+        }
+        st->l1.bcs = bcs;
+        setstack_manager(st);
+        bcs->st = st;
+        setstack_l1_B(st);
+        return (0);
+}
+
+void
+init_modem(struct IsdnCardState *cs) {
+
+        cs->bcs[0].BC_SetStack = setstack_elsa;
+        cs->bcs[1].BC_SetStack = setstack_elsa;
+        cs->bcs[0].BC_Close = close_elsastate;
+        cs->bcs[1].BC_Close = close_elsastate;
+        if (!(cs->hw.elsa.rcvbuf = kmalloc(MAX_MODEM_BUF,
+                GFP_ATOMIC))) {
+                printk(KERN_WARNING
+                        "Elsa: No modem mem hw.elsa.rcvbuf\n");
+                return;
+        }
+        if (!(cs->hw.elsa.transbuf = kmalloc(MAX_MODEM_BUF,
+                GFP_ATOMIC))) {
+                printk(KERN_WARNING
+                        "Elsa: No modem mem hw.elsa.transbuf\n");
+                kfree(cs->hw.elsa.rcvbuf);
+                cs->hw.elsa.rcvbuf = NULL;
+                return;
+        }
+        if (mstartup(cs)) {
+                printk(KERN_WARNING "Elsa: problem startup modem\n");
+        }
+        modem_set_init(cs);
+}
+
+void
+release_modem(struct IsdnCardState *cs) {
+
+        cs->hw.elsa.MFlag = 0;
+        if (cs->hw.elsa.transbuf) {
+                if (cs->hw.elsa.rcvbuf) {
+                        mshutdown(cs);
+                        kfree(cs->hw.elsa.rcvbuf);
+                        cs->hw.elsa.rcvbuf = NULL;
+                }
+                kfree(cs->hw.elsa.transbuf);
+                cs->hw.elsa.transbuf = NULL;
+        }
+}