elsa_ser.c
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上传日期:2013-02-24
资源大小:30529k
文件大小:17k
- /* $Id: elsa_ser.c,v 1.1.4.1 2001/11/20 14:19:35 kai 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&D2r ";
- static char *MInit_2 = "ATL2M1S64=13r ";
- static char *MInit_3 = "AT+FCLASS=0r ";
- static char *MInit_4 = "ATV1S2=128X1r ";
- static char *MInit_5 = "AT\V8\N3r ";
- static char *MInit_6 = "ATL0M0&G0%E1r ";
- static char *MInit_7 = "AT%L1%M0%C3r ";
- static char *MInit_speed28800 = "AT%G0%B28800r ";
- static char *MInit_dialout = "ATs7=60 x1 dr ";
- static char *MInit_dialin = "ATs7=60 x1 ar ";
- 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;
- unsigned long flags;
- /* 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);
- save_flags(flags);
- cli();
- 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);
- restore_flags(flags);
- }
- static int mstartup(struct IsdnCardState *cs)
- {
- unsigned long flags;
- int retval=0;
- save_flags(flags); cli();
- /*
- * 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:
- restore_flags(flags);
- 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)
- {
- unsigned long flags;
- #ifdef SERIAL_DEBUG_OPEN
- printk(KERN_DEBUG"Shutting down serial ....");
- #endif
-
- save_flags(flags); cli(); /* Disable interrupts */
- /*
- * 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 */
-
- restore_flags(flags);
- #ifdef SERIAL_DEBUG_OPEN
- printk(" donen");
- #endif
- }
- inline int
- write_modem(struct BCState *bcs) {
- int ret=0;
- struct IsdnCardState *cs = bcs->cs;
- int count, len, fp;
- long flags;
-
- if (!bcs->tx_skb)
- return 0;
- if (bcs->tx_skb->len <= 0)
- return 0;
- save_flags(flags);
- cli();
- 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);
- }
- restore_flags(flags);
- return(ret);
- }
- inline void
- modem_fill(struct BCState *bcs) {
-
- if (bcs->tx_skb) {
- if (bcs->tx_skb->len) {
- write_modem(bcs);
- return;
- } else {
- if (bcs->st->lli.l1writewakeup &&
- (PACKET_NOACK != bcs->tx_skb->pkt_type))
- bcs->st->lli.l1writewakeup(bcs->st,
- bcs->hw.hscx.count);
- 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);
- hscx_sched_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 memoryn");
- 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);
- }
- hscx_sched_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, 0);
- 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;
- long flags;
-
- if (!len)
- return;
- save_flags(flags);
- cli();
- if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
- restore_flags(flags);
- 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);
- }
- restore_flags(flags);
- }
- void
- modem_set_init(struct IsdnCardState *cs) {
- long flags;
- int timeout;
- #define RCV_DELAY 20000
- save_flags(flags);
- sti();
- 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);
- restore_flags(flags);
- }
- void
- modem_set_dial(struct IsdnCardState *cs, int outgoing) {
- long flags;
- int timeout;
- #define RCV_DELAY 20000
- save_flags(flags);
- sti();
- 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);
- restore_flags(flags);
- }
- void
- modem_l2l1(struct PStack *st, int pr, void *arg)
- {
- struct sk_buff *skb = arg;
- long flags;
- if (pr == (PH_DATA | REQUEST)) {
- save_flags(flags);
- cli();
- if (st->l1.bcs->tx_skb) {
- skb_queue_tail(&st->l1.bcs->squeue, skb);
- restore_flags(flags);
- } else {
- st->l1.bcs->tx_skb = skb;
- test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
- st->l1.bcs->hw.hscx.count = 0;
- restore_flags(flags);
- write_modem(st->l1.bcs);
- }
- } else if (pr == (PH_ACTIVATE | REQUEST)) {
- test_and_set_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
- st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
- set_arcofi(st->l1.bcs->cs, st->l1.bc);
- mstartup(st->l1.bcs->cs);
- modem_set_dial(st->l1.bcs->cs, test_bit(FLG_ORIG, &st->l2.flag));
- st->l1.bcs->cs->hw.elsa.MFlag=2;
- } else if (pr == (PH_DEACTIVATE | REQUEST)) {
- test_and_clear_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
- st->l1.bcs->cs->dc.isac.arcofi_bc = st->l1.bc;
- arcofi_fsm(st->l1.bcs->cs, ARCOFI_START, &ARCOFI_XOP_0);
- interruptible_sleep_on(&st->l1.bcs->cs->dc.isac.arcofi_wait);
- st->l1.bcs->cs->hw.elsa.MFlag=1;
- } else {
- printk(KERN_WARNING"ElsaSer: unknown pr %xn", 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.rcvbufn");
- return;
- }
- if (!(cs->hw.elsa.transbuf = kmalloc(MAX_MODEM_BUF,
- GFP_ATOMIC))) {
- printk(KERN_WARNING
- "Elsa: No modem mem hw.elsa.transbufn");
- kfree(cs->hw.elsa.rcvbuf);
- cs->hw.elsa.rcvbuf = NULL;
- return;
- }
- if (mstartup(cs)) {
- printk(KERN_WARNING "Elsa: problem startup modemn");
- }
- 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;
- }
- }