659 lines
17 KiB
C
659 lines
17 KiB
C
/* $Id: elsa_ser.c,v 2.14.2.3 2004/02/11 13:21:33 keil Exp $
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*
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* stuff for the serial modem on ELSA cards
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#define MAX_MODEM_BUF 256
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#define WAKEUP_CHARS (MAX_MODEM_BUF/2)
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#define RS_ISR_PASS_LIMIT 256
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#define BASE_BAUD ( 1843200 / 16 )
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//#define SERIAL_DEBUG_OPEN 1
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//#define SERIAL_DEBUG_INTR 1
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//#define SERIAL_DEBUG_FLOW 1
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#undef SERIAL_DEBUG_OPEN
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#undef SERIAL_DEBUG_INTR
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#undef SERIAL_DEBUG_FLOW
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#undef SERIAL_DEBUG_REG
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//#define SERIAL_DEBUG_REG 1
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#ifdef SERIAL_DEBUG_REG
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static u_char deb[32];
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const char *ModemIn[] = {"RBR","IER","IIR","LCR","MCR","LSR","MSR","SCR"};
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const char *ModemOut[] = {"THR","IER","FCR","LCR","MCR","LSR","MSR","SCR"};
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#endif
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static char *MInit_1 = "AT&F&C1E0&D2\r\0";
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static char *MInit_2 = "ATL2M1S64=13\r\0";
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static char *MInit_3 = "AT+FCLASS=0\r\0";
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static char *MInit_4 = "ATV1S2=128X1\r\0";
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static char *MInit_5 = "AT\\V8\\N3\r\0";
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static char *MInit_6 = "ATL0M0&G0%E1\r\0";
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static char *MInit_7 = "AT%L1%M0%C3\r\0";
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static char *MInit_speed28800 = "AT%G0%B28800\r\0";
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static char *MInit_dialout = "ATs7=60 x1 d\r\0";
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static char *MInit_dialin = "ATs7=60 x1 a\r\0";
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static inline unsigned int serial_in(struct IsdnCardState *cs, int offset)
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{
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#ifdef SERIAL_DEBUG_REG
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u_int val = inb(cs->hw.elsa.base + 8 + offset);
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debugl1(cs,"in %s %02x",ModemIn[offset], val);
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return(val);
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#else
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return inb(cs->hw.elsa.base + 8 + offset);
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#endif
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}
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static inline unsigned int serial_inp(struct IsdnCardState *cs, int offset)
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{
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#ifdef SERIAL_DEBUG_REG
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#ifdef ELSA_SERIAL_NOPAUSE_IO
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u_int val = inb(cs->hw.elsa.base + 8 + offset);
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debugl1(cs,"inp %s %02x",ModemIn[offset], val);
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#else
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u_int val = inb_p(cs->hw.elsa.base + 8 + offset);
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debugl1(cs,"inP %s %02x",ModemIn[offset], val);
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#endif
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return(val);
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#else
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#ifdef ELSA_SERIAL_NOPAUSE_IO
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return inb(cs->hw.elsa.base + 8 + offset);
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#else
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return inb_p(cs->hw.elsa.base + 8 + offset);
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#endif
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#endif
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}
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static inline void serial_out(struct IsdnCardState *cs, int offset, int value)
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{
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#ifdef SERIAL_DEBUG_REG
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debugl1(cs,"out %s %02x",ModemOut[offset], value);
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#endif
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outb(value, cs->hw.elsa.base + 8 + offset);
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}
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static inline void serial_outp(struct IsdnCardState *cs, int offset,
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int value)
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{
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#ifdef SERIAL_DEBUG_REG
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#ifdef ELSA_SERIAL_NOPAUSE_IO
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debugl1(cs,"outp %s %02x",ModemOut[offset], value);
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#else
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debugl1(cs,"outP %s %02x",ModemOut[offset], value);
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#endif
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#endif
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#ifdef ELSA_SERIAL_NOPAUSE_IO
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outb(value, cs->hw.elsa.base + 8 + offset);
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#else
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outb_p(value, cs->hw.elsa.base + 8 + offset);
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#endif
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}
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/*
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* This routine is called to set the UART divisor registers to match
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* the specified baud rate for a serial port.
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*/
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static void change_speed(struct IsdnCardState *cs, int baud)
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{
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int quot = 0, baud_base;
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unsigned cval, fcr = 0;
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int bits;
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/* byte size and parity */
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cval = 0x03; bits = 10;
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/* Determine divisor based on baud rate */
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baud_base = BASE_BAUD;
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quot = baud_base / baud;
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/* If the quotient is ever zero, default to 9600 bps */
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if (!quot)
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quot = baud_base / 9600;
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/* Set up FIFO's */
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if ((baud_base / quot) < 2400)
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fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
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else
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fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
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serial_outp(cs, UART_FCR, fcr);
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/* CTS flow control flag and modem status interrupts */
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cs->hw.elsa.IER &= ~UART_IER_MSI;
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cs->hw.elsa.IER |= UART_IER_MSI;
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serial_outp(cs, UART_IER, cs->hw.elsa.IER);
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debugl1(cs,"modem quot=0x%x", quot);
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serial_outp(cs, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
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serial_outp(cs, UART_DLL, quot & 0xff); /* LS of divisor */
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serial_outp(cs, UART_DLM, quot >> 8); /* MS of divisor */
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serial_outp(cs, UART_LCR, cval); /* reset DLAB */
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serial_inp(cs, UART_RX);
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}
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static int mstartup(struct IsdnCardState *cs)
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{
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int retval=0;
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/*
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* Clear the FIFO buffers and disable them
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* (they will be reenabled in change_speed())
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*/
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serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
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/*
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* At this point there's no way the LSR could still be 0xFF;
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* if it is, then bail out, because there's likely no UART
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* here.
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*/
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if (serial_inp(cs, UART_LSR) == 0xff) {
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retval = -ENODEV;
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goto errout;
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}
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/*
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* Clear the interrupt registers.
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*/
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(void) serial_inp(cs, UART_RX);
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(void) serial_inp(cs, UART_IIR);
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(void) serial_inp(cs, UART_MSR);
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/*
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* Now, initialize the UART
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*/
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serial_outp(cs, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
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cs->hw.elsa.MCR = 0;
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cs->hw.elsa.MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
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serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
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/*
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* Finally, enable interrupts
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*/
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cs->hw.elsa.IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
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serial_outp(cs, UART_IER, cs->hw.elsa.IER); /* enable interrupts */
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/*
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* And clear the interrupt registers again for luck.
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*/
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(void)serial_inp(cs, UART_LSR);
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(void)serial_inp(cs, UART_RX);
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(void)serial_inp(cs, UART_IIR);
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(void)serial_inp(cs, UART_MSR);
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cs->hw.elsa.transcnt = cs->hw.elsa.transp = 0;
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cs->hw.elsa.rcvcnt = cs->hw.elsa.rcvp =0;
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/*
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* and set the speed of the serial port
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*/
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change_speed(cs, BASE_BAUD);
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cs->hw.elsa.MFlag = 1;
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errout:
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return retval;
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}
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/*
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* This routine will shutdown a serial port; interrupts are disabled, and
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* DTR is dropped if the hangup on close termio flag is on.
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*/
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static void mshutdown(struct IsdnCardState *cs)
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{
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#ifdef SERIAL_DEBUG_OPEN
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printk(KERN_DEBUG"Shutting down serial ....");
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#endif
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/*
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* clear delta_msr_wait queue to avoid mem leaks: we may free the irq
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* here so the queue might never be waken up
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*/
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cs->hw.elsa.IER = 0;
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serial_outp(cs, UART_IER, 0x00); /* disable all intrs */
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cs->hw.elsa.MCR &= ~UART_MCR_OUT2;
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/* disable break condition */
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serial_outp(cs, UART_LCR, serial_inp(cs, UART_LCR) & ~UART_LCR_SBC);
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cs->hw.elsa.MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
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serial_outp(cs, UART_MCR, cs->hw.elsa.MCR);
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/* disable FIFO's */
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serial_outp(cs, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
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serial_inp(cs, UART_RX); /* read data port to reset things */
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#ifdef SERIAL_DEBUG_OPEN
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printk(" done\n");
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#endif
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}
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static inline int
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write_modem(struct BCState *bcs) {
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int ret=0;
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struct IsdnCardState *cs = bcs->cs;
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int count, len, fp;
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if (!bcs->tx_skb)
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return 0;
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if (bcs->tx_skb->len <= 0)
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return 0;
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len = bcs->tx_skb->len;
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if (len > MAX_MODEM_BUF - cs->hw.elsa.transcnt)
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len = MAX_MODEM_BUF - cs->hw.elsa.transcnt;
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fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
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fp &= (MAX_MODEM_BUF -1);
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count = len;
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if (count > MAX_MODEM_BUF - fp) {
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count = MAX_MODEM_BUF - fp;
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skb_copy_from_linear_data(bcs->tx_skb,
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cs->hw.elsa.transbuf + fp, count);
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skb_pull(bcs->tx_skb, count);
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cs->hw.elsa.transcnt += count;
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ret = count;
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count = len - count;
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fp = 0;
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}
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skb_copy_from_linear_data(bcs->tx_skb,
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cs->hw.elsa.transbuf + fp, count);
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skb_pull(bcs->tx_skb, count);
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cs->hw.elsa.transcnt += count;
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ret += count;
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if (cs->hw.elsa.transcnt &&
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!(cs->hw.elsa.IER & UART_IER_THRI)) {
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cs->hw.elsa.IER |= UART_IER_THRI;
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serial_outp(cs, UART_IER, cs->hw.elsa.IER);
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}
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return(ret);
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}
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static inline void
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modem_fill(struct BCState *bcs) {
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if (bcs->tx_skb) {
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if (bcs->tx_skb->len) {
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write_modem(bcs);
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return;
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} else {
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if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
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(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
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u_long flags;
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spin_lock_irqsave(&bcs->aclock, flags);
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bcs->ackcnt += bcs->hw.hscx.count;
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spin_unlock_irqrestore(&bcs->aclock, flags);
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schedule_event(bcs, B_ACKPENDING);
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}
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dev_kfree_skb_any(bcs->tx_skb);
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bcs->tx_skb = NULL;
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}
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}
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if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
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bcs->hw.hscx.count = 0;
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test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
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write_modem(bcs);
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} else {
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test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
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schedule_event(bcs, B_XMTBUFREADY);
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}
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}
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static inline void receive_chars(struct IsdnCardState *cs,
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int *status)
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{
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unsigned char ch;
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struct sk_buff *skb;
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do {
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ch = serial_in(cs, UART_RX);
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if (cs->hw.elsa.rcvcnt >= MAX_MODEM_BUF)
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break;
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cs->hw.elsa.rcvbuf[cs->hw.elsa.rcvcnt++] = ch;
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#ifdef SERIAL_DEBUG_INTR
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printk("DR%02x:%02x...", ch, *status);
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#endif
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if (*status & (UART_LSR_BI | UART_LSR_PE |
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UART_LSR_FE | UART_LSR_OE)) {
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#ifdef SERIAL_DEBUG_INTR
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printk("handling exept....");
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#endif
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}
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*status = serial_inp(cs, UART_LSR);
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} while (*status & UART_LSR_DR);
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if (cs->hw.elsa.MFlag == 2) {
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if (!(skb = dev_alloc_skb(cs->hw.elsa.rcvcnt)))
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printk(KERN_WARNING "ElsaSER: receive out of memory\n");
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else {
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memcpy(skb_put(skb, cs->hw.elsa.rcvcnt), cs->hw.elsa.rcvbuf,
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cs->hw.elsa.rcvcnt);
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skb_queue_tail(& cs->hw.elsa.bcs->rqueue, skb);
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}
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schedule_event(cs->hw.elsa.bcs, B_RCVBUFREADY);
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} else {
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char tmp[128];
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char *t = tmp;
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t += sprintf(t, "modem read cnt %d", cs->hw.elsa.rcvcnt);
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QuickHex(t, cs->hw.elsa.rcvbuf, cs->hw.elsa.rcvcnt);
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debugl1(cs, tmp);
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}
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cs->hw.elsa.rcvcnt = 0;
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}
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static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
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{
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int count;
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debugl1(cs, "transmit_chars: p(%x) cnt(%x)", cs->hw.elsa.transp,
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cs->hw.elsa.transcnt);
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if (cs->hw.elsa.transcnt <= 0) {
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cs->hw.elsa.IER &= ~UART_IER_THRI;
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serial_out(cs, UART_IER, cs->hw.elsa.IER);
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return;
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}
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count = 16;
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do {
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serial_outp(cs, UART_TX, cs->hw.elsa.transbuf[cs->hw.elsa.transp++]);
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if (cs->hw.elsa.transp >= MAX_MODEM_BUF)
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cs->hw.elsa.transp=0;
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if (--cs->hw.elsa.transcnt <= 0)
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break;
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} while (--count > 0);
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if ((cs->hw.elsa.transcnt < WAKEUP_CHARS) && (cs->hw.elsa.MFlag==2))
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modem_fill(cs->hw.elsa.bcs);
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#ifdef SERIAL_DEBUG_INTR
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printk("THRE...");
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#endif
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if (intr_done)
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*intr_done = 0;
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if (cs->hw.elsa.transcnt <= 0) {
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cs->hw.elsa.IER &= ~UART_IER_THRI;
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serial_outp(cs, UART_IER, cs->hw.elsa.IER);
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}
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}
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static void rs_interrupt_elsa(struct IsdnCardState *cs)
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{
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int status, iir, msr;
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int pass_counter = 0;
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#ifdef SERIAL_DEBUG_INTR
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printk(KERN_DEBUG "rs_interrupt_single(%d)...", cs->irq);
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#endif
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do {
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status = serial_inp(cs, UART_LSR);
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debugl1(cs,"rs LSR %02x", status);
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#ifdef SERIAL_DEBUG_INTR
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printk("status = %x...", status);
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#endif
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if (status & UART_LSR_DR)
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receive_chars(cs, &status);
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if (status & UART_LSR_THRE)
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transmit_chars(cs, NULL);
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if (pass_counter++ > RS_ISR_PASS_LIMIT) {
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printk("rs_single loop break.\n");
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break;
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}
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iir = serial_inp(cs, UART_IIR);
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debugl1(cs,"rs IIR %02x", iir);
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if ((iir & 0xf) == 0) {
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msr = serial_inp(cs, UART_MSR);
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debugl1(cs,"rs MSR %02x", msr);
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}
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} while (!(iir & UART_IIR_NO_INT));
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#ifdef SERIAL_DEBUG_INTR
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printk("end.\n");
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#endif
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}
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extern int open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs);
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extern void modehscx(struct BCState *bcs, int mode, int bc);
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extern void hscx_l2l1(struct PStack *st, int pr, void *arg);
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static void
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close_elsastate(struct BCState *bcs)
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{
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modehscx(bcs, 0, bcs->channel);
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if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
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if (bcs->hw.hscx.rcvbuf) {
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if (bcs->mode != L1_MODE_MODEM)
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kfree(bcs->hw.hscx.rcvbuf);
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bcs->hw.hscx.rcvbuf = NULL;
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}
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skb_queue_purge(&bcs->rqueue);
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skb_queue_purge(&bcs->squeue);
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if (bcs->tx_skb) {
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dev_kfree_skb_any(bcs->tx_skb);
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bcs->tx_skb = NULL;
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test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
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}
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}
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}
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static void
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modem_write_cmd(struct IsdnCardState *cs, u_char *buf, int len) {
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int count, fp;
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u_char *msg = buf;
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if (!len)
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return;
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if (len > (MAX_MODEM_BUF - cs->hw.elsa.transcnt)) {
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return;
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}
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fp = cs->hw.elsa.transcnt + cs->hw.elsa.transp;
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fp &= (MAX_MODEM_BUF -1);
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count = len;
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if (count > MAX_MODEM_BUF - fp) {
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count = MAX_MODEM_BUF - fp;
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memcpy(cs->hw.elsa.transbuf + fp, msg, count);
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cs->hw.elsa.transcnt += count;
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msg += count;
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count = len - count;
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|
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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
modem_set_init(struct IsdnCardState *cs) {
|
|
int timeout;
|
|
|
|
#define RCV_DELAY 20
|
|
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);
|
|
mdelay(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);
|
|
mdelay(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);
|
|
mdelay(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);
|
|
mdelay(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);
|
|
mdelay(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);
|
|
mdelay(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);
|
|
mdelay(RCV_DELAY);
|
|
}
|
|
|
|
static void
|
|
modem_set_dial(struct IsdnCardState *cs, int outgoing) {
|
|
int timeout;
|
|
#define RCV_DELAY 20
|
|
|
|
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);
|
|
mdelay(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);
|
|
mdelay(RCV_DELAY);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
}
|