diff options
Diffstat (limited to 'c/src/libnetworking/pppd/modem_example/modem.c')
| -rw-r--r-- | c/src/libnetworking/pppd/modem_example/modem.c | 1438 |
1 files changed, 0 insertions, 1438 deletions
diff --git a/c/src/libnetworking/pppd/modem_example/modem.c b/c/src/libnetworking/pppd/modem_example/modem.c deleted file mode 100644 index 119421e476..0000000000 --- a/c/src/libnetworking/pppd/modem_example/modem.c +++ /dev/null @@ -1,1438 +0,0 @@ -/* - * Modem device driver for RTEMS - * Author: Tomasz Domin (dot@comarch.pl) - * Copyright (C) 1998 by ComArch SA - * Driver will use termios for character output and ppp specific out procecedures for network protocols - */ - -#include <bsp.h> -#include <rtems.h> -#include <rtems/libio.h> -#include <sys/ttycom.h> -#include <unistd.h> -#include <sys/errno.h> -#include <rtems/rtems/event.h> -#include <rtems/rtems/tasks.h> -#include <mpc823.h> -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/proc.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <sys/file.h> - -#include <sys/kernel.h> -#include <sys/conf.h> -#include <net/if.h> -#include <net/ppp_defs.h> -#include <sys/fcntl.h> -#include "ppp.h" -#include <net/if_pppvar.h> -#include <net/if_ppp.h> -/* RTEMS specific */ -rtems_id modem_task_id; -#include "16550.h" -#include <mpc823.h> -#define ESCAPE_P(c) (sc->sc_asyncmap[(c) >> 5] & (1 << ((c) & 0x1F))) -#define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) - -#define M_DATASTART(m) \ - (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ - (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) - -#define M_DATASIZE(m) \ - (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ - (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) - - -struct rtems_termios_tty *modem_tty; -/* - * RTEMS event used by interrupt handler to signal daemons. - * This must *not* be the same event used by the KA9Q task synchronization. - */ -#define INTERRUPT_EVENT RTEMS_EVENT_1 -#define START_TRANSMIT_EVENT RTEMS_EVENT_2 -#define PPP_LOWAT 100 /* Process more output when < LOWAT on queue */ -#define PPP_HIWAT 400 /* Don't start a new packet if HIWAT on que */ - -/* - * RTEMS event used to start transmit daemon. - * This must not be the same as INTERRUPT_EVENT. - */ - -/*static struct modem_tty *tp=&modem_tp;*/ -static rtems_id modem_rx_task,modem_tx_task; - - - -/* internal FIFO buffers for input and output characters */ -#define MODEM_BUFFER_LENGTH 4096 -#define RTS_STOP_SIZE MODEM_BUFFER_LENGTH-128 -#define RTS_START_SIZE 16 - -int xmt_start,xmt_len; -int rcv_start,rcv_len; - -static unsigned char xmt_buf[MODEM_BUFFER_LENGTH]; -static unsigned char rcv_buf[MODEM_BUFFER_LENGTH]; - -static volatile char _tx_stop = 0 ,_modem_cd=0; -struct ModemData -{ - int t_line; - struct ppp_softc *t_sc; - rtems_id pppsem; - int offhook; -} ModemData; - -int pppstart(struct tty *ignore); -static u_short fcstab[256] = { - 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, - 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, - 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, - 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, - 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, - 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, - 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, - 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, - 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, - 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, - 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, - 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, - 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, - 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, - 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, - 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, - 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, - 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, - 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, - 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, - 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, - 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, - 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, - 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, - 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, - 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, - 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, - 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, - 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, - 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, - 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, - 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 -}; - - -static u_short -pppfcs(fcs, cp, len) - register u_short fcs; - register u_char *cp; - register int len; -{ - while (len--) - fcs = PPP_FCS(fcs, *cp++); - return (fcs); -} - -static void -ppp_timeout(x) - void *x; -{ - struct ppp_softc *sc = ModemData.t_sc; - struct tty *tp = (struct tty *) sc->sc_devp; - int s; - - sc->sc_flags &= ~SC_TIMEOUT; - pppstart(tp); -} - -static void -pppasyncrelinq(sc) - struct ppp_softc *sc; -{ - int s; - - if (sc->sc_outm) { - m_freem(sc->sc_outm); - sc->sc_outm = NULL; - } - if (sc->sc_m) { - m_freem(sc->sc_m); - sc->sc_m = NULL; - } - if (sc->sc_flags & SC_TIMEOUT) { - untimeout(ppp_timeout, (void *) sc); - sc->sc_flags &= ~SC_TIMEOUT; - } -} - -/* Put data in input queue */ -int -pppstart(struct tty *ignore) -{ - register struct ppp_softc *sc = ModemData.t_sc; - - /* - * If there is stuff in the output queue, send it now. - * We are being called in lieu of ttstart and must do what it would. - */ - rtems_event_send(modem_tx_task,START_TRANSMIT_EVENT); - sc->sc_if.if_flags |= IFF_OACTIVE; - - /* - * If the transmit queue has drained and the tty has not hung up - * or been disconnected from the ppp unit, then tell if_ppp.c that - * we need more output. - */ -/* if (CCOUNT(&tp->t_outq) < PPP_LOWAT - && !((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) - && sc != NULL && tp == (struct tty *) sc->sc_devp) { - ppp_restart(sc); - } -*/ - return 0; -} -int putc(unsigned char c) -{ - int level; - - if (xmt_len<MODEM_BUFFER_LENGTH-1) - { - _CPU_ISR_Disable(level); - xmt_buf[(xmt_start+xmt_len)%MODEM_BUFFER_LENGTH]=c; - xmt_len++; - _CPU_ISR_Enable(level); - return 0; - } - return 1; -} - -void unputc(void) -{ - int level; - - if (xmt_len==0) - return; - _CPU_ISR_Disable(level); - xmt_len--; - _CPU_ISR_Enable(level); -} - -static void -pppasyncstart(sc) - register struct ppp_softc *sc; -{ - /* Call pppstart to start output again if necessary. */ - pppstart(sc->sc_devp); - - /* - * This timeout is needed for operation on a pseudo-tty, - * because the pty code doesn't call pppstart after it has - * drained the t_outq. - */ -/* if (!idle && (sc->sc_flags & SC_TIMEOUT) == 0) { - timeout(ppp_timeout, (void *) sc, 1); - sc->sc_flags |= SC_TIMEOUT; - } -*/ - -} - - -void modem_sendpacket() -{ - struct mbuf *l = NULL; - rtems_unsigned16 status; - int curr; - register struct mbuf *m; - register int len; - register u_char *start, *stop, *cp; - int n, ndone, done, idle; - struct mbuf *m2; - int s; - register struct ppp_softc *sc=ModemData.t_sc; - - - while (xmt_len < PPP_HIWAT) { - /* - * See if we have an existing packet partly sent. - * If not, get a new packet and start sending it. - */ - m = sc->sc_outm; - if (m == NULL) { - /* - * Get another packet to be sent. - - */ - m = ppp_dequeue(sc); - if (m == NULL) - { - break; - } - - /* - * The extra PPP_FLAG will start up a new packet, and thus - * will flush any accumulated garbage. We do this whenever - * the line may have been idle for some time. - */ - if (xmt_len == 0) { - ++sc->sc_stats.ppp_obytes; - putc(PPP_FLAG); - } - - /* Calculate the FCS for the first mbuf's worth. */ - sc->sc_outfcs = pppfcs(PPP_INITFCS, mtod(m, u_char *), m->m_len); - microtime(&sc->sc_if.if_lastchange); - } - - for (;;) { - start = mtod(m, u_char *); - len = m->m_len; - stop = start + len; - while (len > 0) { - /* - * Find out how many bytes in the string we can - * handle without doing something special. - */ - for (cp = start; cp < stop; cp++) - if (ESCAPE_P(*cp)) - break; - n = cp - start; - if (n) { - register int i; - /* NetBSD (0.9 or later), 4.3-Reno or similar. */ - for(i=0;i<n;i++) - if (putc(start[i])) - break; - ndone = i; - len -= ndone; - start += ndone; - sc->sc_stats.ppp_obytes += ndone; - - if (ndone < n) - break; /* packet doesn't fit */ - } - /* - * If there are characters left in the mbuf, - * the first one must be special. - * Put it out in a different form. - */ - if (len) { - if (putc(PPP_ESCAPE)) - break; - if (putc(*start ^ PPP_TRANS)) { - unputc(); - break; - } - sc->sc_stats.ppp_obytes += 2; - start++; - len--; - } - } - - /* - * If we didn't empty this mbuf, remember where we're up to. - * If we emptied the last mbuf, try to add the FCS and closing - * flag, and if we can't, leave sc_outm pointing to m, but with - * m->m_len == 0, to remind us to output the FCS and flag later. - */ - done = len == 0; - if (done && m->m_next == NULL) { - u_char *p, *q; - int c; - u_char endseq[8]; - - /* - * We may have to escape the bytes in the FCS. - */ - p = endseq; - c = ~sc->sc_outfcs & 0xFF; - if (ESCAPE_P(c)) { - *p++ = PPP_ESCAPE; - *p++ = c ^ PPP_TRANS; - } else - *p++ = c; - c = (~sc->sc_outfcs >> 8) & 0xFF; - if (ESCAPE_P(c)) { - *p++ = PPP_ESCAPE; - *p++ = c ^ PPP_TRANS; - } else - *p++ = c; - *p++ = PPP_FLAG; - - /* - * Try to output the FCS and flag. If the bytes - * don't all fit, back out. - */ - for (q = endseq; q < p; ++q) - if (putc(*q)) { - done = 0; - for (; q > endseq; --q) - unputc(); - break; - } - if (done) - sc->sc_stats.ppp_obytes += q - endseq; - } - - if (!done) { - /* remember where we got to */ - m->m_data = start; - m->m_len = len; - break; - } - - /* Finished with this mbuf; free it and move on. */ - MFREE(m, m2); - m = m2; - if (m == NULL) { - /* Finished a packet */ - break; - } - sc->sc_outfcs = pppfcs(sc->sc_outfcs, mtod(m, u_char *), m->m_len); - } - - /* - * If m == NULL, we have finished a packet. - * If m != NULL, we've either done as much work this time - * as we need to, or else we've filled up the output queue. - */ - sc->sc_outm = m; - if (m) - break; - } - -} - -static void -pppasyncctlp(sc) - struct ppp_softc *sc; -{ - rtems_semaphore_release(ModemData.pppsem); -} - - -static unsigned paritytab[8] = { - 0x96696996, 0x69969669, 0x69969669, 0x96696996, - 0x69969669, 0x96696996, 0x96696996, 0x69969669 -}; -#define MAX_DUMP_BYTES 128 - -static void -pppdumpb(b, l) - u_char *b; - int l; -{ - char buf[3*MAX_DUMP_BYTES+4]; - char *bp = buf; - static char digits[] = "0123456789abcdef"; - - while (l--) { - if (bp >= buf + sizeof(buf) - 3) { - *bp++ = '>'; - break; - } - *bp++ = digits[*b >> 4]; /* convert byte to ascii hex */ - *bp++ = digits[*b++ & 0xf]; - *bp++ = ' '; - } - - *bp = 0; - -} - -static void -ppplogchar(sc, c) - struct ppp_softc *sc; - int c; -{ - if (c >= 0) - sc->sc_rawin[sc->sc_rawin_count++] = c; - if (sc->sc_rawin_count >= sizeof(sc->sc_rawin) - || (c < 0 && sc->sc_rawin_count > 0)) { -/* printf("ppp%d input: ", sc->sc_if.if_unit); -*/ pppdumpb(sc->sc_rawin, sc->sc_rawin_count); - sc->sc_rawin_count = 0; - } -} -static void -pppgetm(sc) - register struct ppp_softc *sc; -{ - struct mbuf *m, **mp; - int len; - mp = &sc->sc_m; - for (len = sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN; len > 0; ){ - if ((m = *mp) == NULL) { - MGETHDR(m, M_DONTWAIT, MT_DATA); - if (m == NULL) - break; - *mp = m; - MCLGET(m, M_DONTWAIT); - } - len -= M_DATASIZE(m); - mp = &m->m_next; - } -} - - -int -pppinput(c) - int c; - -{ - register struct ppp_softc *sc=ModemData.t_sc; - struct mbuf *m; - int ilen, s; - - if (sc == NULL ) - return 0; - - ++sc->sc_stats.ppp_ibytes; -/* - if (c & TTY_FE) {*/ - /* framing error or overrun on this char - abort packet */ -/* if (sc->sc_flags & SC_DEBUG) - printf("ppp%d: bad char %x\n", sc->sc_if.if_unit, c); - goto flush; - }*/ - - c &= 0xff; - - /* - * Handle software flow control of output. - */ -/* if (tp->t_iflag & IXON) { - if (c == tp->t_cc[VSTOP] ) { - if ((tp->t_state & TS_TTSTOP) == 0) { - tp->t_state |= TS_TTSTOP; - sccppp_stop_transmission(tp); - } - return 0; - } - if (c == tp->t_cc[VSTART] ) { - tp->t_state &= ~TS_TTSTOP; - sccppp_start_transmission(tp); - return 0; - } - } -*/ - - if (c & 0x80) - sc->sc_flags |= SC_RCV_B7_1; - else - sc->sc_flags |= SC_RCV_B7_0; - if (paritytab[c >> 5] & (1 << (c & 0x1F))) - sc->sc_flags |= SC_RCV_ODDP; - else - sc->sc_flags |= SC_RCV_EVNP; - - -/* if (sc->sc_flags & SC_LOG_RAWIN)*/ -// ppplogchar(sc, c); - - if (c == PPP_FLAG) { - ilen = sc->sc_ilen; - sc->sc_ilen = 0; - - if (sc->sc_rawin_count > 0) - ppplogchar(sc, -1); - - /* - * If SC_ESCAPED is set, then we've seen the packet - * abort sequence - */ - if (sc->sc_flags & (SC_FLUSH | SC_ESCAPED) - || (ilen > 0 && sc->sc_fcs != PPP_GOODFCS)) { - sc->sc_flags |= SC_PKTLOST; /* note the dropped packet */ - if ((sc->sc_flags & (SC_FLUSH | SC_ESCAPED)) == 0){ - if (sc->sc_flags & SC_DEBUG) - printf("ppp%d: bad fcs %x, pkt len %d\n", - sc->sc_if.if_unit, sc->sc_fcs, ilen); - sc->sc_if.if_ierrors++; - sc->sc_stats.ppp_ierrors++; - } else - sc->sc_flags &= ~(SC_FLUSH | SC_ESCAPED); - return 0; - } - - if (ilen < PPP_HDRLEN + PPP_FCSLEN) { - if (ilen) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: too short (%d)\n", sc->sc_if.if_unit, ilen); -*/ sc->sc_if.if_ierrors++; - sc->sc_stats.ppp_ierrors++; - sc->sc_flags |= SC_PKTLOST; - splx(s); - } - return 0; - } - - /* - * Remove FCS trailer. Somewhat painful... - */ - ilen -= 2; - if (--sc->sc_mc->m_len == 0) { - for (m = sc->sc_m; m->m_next != sc->sc_mc; m = m->m_next) - ; - sc->sc_mc = m; - } - sc->sc_mc->m_len--; - - /* excise this mbuf chain */ - m = sc->sc_m; - sc->sc_m = sc->sc_mc->m_next; - sc->sc_mc->m_next = NULL; - ppppktin(sc, m, sc->sc_flags & SC_PKTLOST); - if (sc->sc_flags & SC_PKTLOST) { - sc->sc_flags &= ~SC_PKTLOST; - } - - pppgetm(sc); - return 0; - } - - if (sc->sc_flags & SC_FLUSH) { - if (sc->sc_flags & SC_LOG_FLUSH) - ppplogchar(sc, c); - return 0; - } - - if (c < 0x20 && (sc->sc_rasyncmap & (1 << c))) - return 0; - - if (sc->sc_flags & SC_ESCAPED) { - sc->sc_flags &= ~SC_ESCAPED; - c ^= PPP_TRANS; - } else if (c == PPP_ESCAPE) { - sc->sc_flags |= SC_ESCAPED; - return 0; - } - - /* - * Initialize buffer on first octet received. - * First octet could be address or protocol (when compressing - * address/control). - * Second octet is control. - * Third octet is first or second (when compressing protocol) - * octet of protocol. - * Fourth octet is second octet of protocol. - */ - if (sc->sc_ilen == 0) { - /* reset the first input mbuf */ - if (sc->sc_m == NULL) { - pppgetm(sc); - if (sc->sc_m == NULL) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: no input mbufs!\n", sc->sc_if.if_unit); -*/ goto flush; - } - } - m = sc->sc_m; - m->m_len = 0; - m->m_data = M_DATASTART(sc->sc_m); - sc->sc_mc = m; - sc->sc_mp = mtod(m, char *); - sc->sc_fcs = PPP_INITFCS; - if (c != PPP_ALLSTATIONS) { - if (sc->sc_flags & SC_REJ_COMP_AC) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: garbage received: 0x%x (need 0xFF)\n", - sc->sc_if.if_unit, c);*/ - goto flush; - } - *sc->sc_mp++ = PPP_ALLSTATIONS; - *sc->sc_mp++ = PPP_UI; - sc->sc_ilen += 2; - m->m_len += 2; - } - } - if (sc->sc_ilen == 1 && c != PPP_UI) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: missing UI (0x3), got 0x%x\n", - sc->sc_if.if_unit, c); -*/ goto flush; - } - if (sc->sc_ilen == 2 && (c & 1) == 1) { - /* a compressed protocol */ - *sc->sc_mp++ = 0; - sc->sc_ilen++; - sc->sc_mc->m_len++; - } - if (sc->sc_ilen == 3 && (c & 1) == 0) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: bad protocol %x\n", sc->sc_if.if_unit, - (sc->sc_mp[-1] << 8) + c); -*/ goto flush; - } - - /* packet beyond configured mru? */ - if (++sc->sc_ilen > sc->sc_mru + PPP_HDRLEN + PPP_FCSLEN) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: packet too big\n", sc->sc_if.if_unit); -*/ goto flush; - } - - /* is this mbuf full? */ - m = sc->sc_mc; - if (M_TRAILINGSPACE(m) <= 0) { - if (m->m_next == NULL) { - pppgetm(sc); - if (m->m_next == NULL) { - if (sc->sc_flags & SC_DEBUG) -/* printf("ppp%d: too few input mbufs!\n", sc->sc_if.if_unit); -*/ goto flush; - } - } - sc->sc_mc = m = m->m_next; - m->m_len = 0; - m->m_data = M_DATASTART(m); - sc->sc_mp = mtod(m, char *); - } - - ++m->m_len; - *sc->sc_mp++ = c; - sc->sc_fcs = PPP_FCS(sc->sc_fcs, c); - return 0; - - flush: - if (!(sc->sc_flags & SC_FLUSH)) { - sc->sc_if.if_ierrors++; - sc->sc_stats.ppp_ierrors++; - sc->sc_flags |= SC_FLUSH; - if (sc->sc_flags & SC_LOG_FLUSH) - ppplogchar(sc, c); - } - return 0; -} - - -void -modem_txDaemon (void *arg) -{ - rtems_event_set events; - register int level,i,maxonce; - while (1) - { - if (xmt_len==0) //if there is nothing then wait for an event - rtems_event_receive(START_TRANSMIT_EVENT|INTERRUPT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events); - /* wait for transmit buffer to become empty */ - - while(_tx_stop) //here we are wainting for transmission start - rtems_event_receive(INTERRUPT_EVENT|START_TRANSMIT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events); - - _CPU_ISR_Disable(level); - if (*LSR & THRE) //if there is no transmission then send first bytes, if there is one they will go eitherway - { - maxonce=(xmt_len>14)?14:xmt_len; - if (maxonce>0) - { - for (i=0;i<maxonce;i++) - { - *THR=xmt_buf[xmt_start]; - xmt_start=(xmt_start+1)%MODEM_BUFFER_LENGTH; - } - xmt_len-=maxonce; - } - } - _CPU_ISR_Enable(level); - if ((ModemData.t_line==PPPDISC)) - { - rtems_bsdnet_semaphore_obtain(); - modem_sendpacket(); - rtems_bsdnet_semaphore_release(); - } - - } -} - -static void modem_rxDaemon (void *arg) -{ - rtems_event_set events; - unsigned char bufor_posr[MODEM_BUFFER_LENGTH]; - register unsigned char ch; - int level,i,j; - while(1) - { - /* wait for interrupt */ - i=0; - _CPU_ISR_Disable(level); - while(rcv_len>0) - { - bufor_posr[i++]=rcv_buf[rcv_start]; - rcv_start=(rcv_start+1)%MODEM_BUFFER_LENGTH; - rcv_len--; - } - _CPU_ISR_Enable(level); - if (ModemData.t_line==PPPDISC) - { - rtems_bsdnet_semaphore_obtain(); - for(j=0;j<i;j++) - pppinput(bufor_posr[j]); - rtems_bsdnet_semaphore_release(); - } - else - if (i!=0)rtems_termios_enqueue_raw_characters(modem_tty,bufor_posr,i); - rtems_event_receive(INTERRUPT_EVENT,RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT,&events); - } -} -#define CLK_FREQ 1843200 -void set_modem_speed(int speed) -{ - *LCR = (char)(DLAB); - *DLL = (char)((int)(CLK_FREQ/speed/16.0+0.5) & 0xFF); - *DLM = (char)(((int)(CLK_FREQ/speed/16.0+0.5) & 0xFF00) >> 8); - *LCR = (char)(WL_8 ); /* 8 bitowe slowo */ -} - - -static void -modem_init (int speed) /* port is the SMC number (i.e. 1 or 2) */ -{ - set_modem_speed(speed); - /* Line control setup */ - - *LCR = (char)(WL_8 ); /* 8 bit word */ - /* was NSB - was 2 is 1*/ - - /* Interrupt setup */ - *IER = (char) 0x0f; /* enable transmit, receive, modem stat int */ - - /* FIFO setup */ - *FCR = (char)(FIFO_E | 0xc0); - - /* Modem control setup */ - *MCR = (char) RTS|DTR|OUT2; - - /* init tx_stop with CTS */ - _tx_stop = ( (*MDSR & CTS) ? 0 : 1); -} - -void set_modem_dtr(int how) -{ - unsigned char ch; - ch=*MCR; - *MCR=(how)?(ch|DTR):(ch&(~DTR)); -} -void modem_status() -{ - unsigned char status; - status=*MDSR; - -/* printf("Modem Status %x ",status); -*/ if (status&CTS) - { - _tx_stop=0; - rtems_event_send (modem_tx_task, START_TRANSMIT_EVENT|INTERRUPT_EVENT); - } - else - { - _tx_stop=1; - } - if (status&DCD) - _modem_cd=1; - else - _modem_cd=0; -} - -static rtems_isr -modemInterruptHandler (rtems_vector_number v) -{ - register char a,i,ch; - register int maxonce; - static errcount = 0; - for(;;) - { - a=*IIR & (NIP | IID_MASK); /* read interrupt id register */ - switch (a) { - case 0x04: case 0x0c: - /* - * Buffer received? - */ - while( (*LSR & DR) != 0) - { - ch=*RBR; - rcv_buf[(rcv_start+rcv_len)%MODEM_BUFFER_LENGTH]=ch; - rcv_len++; - } - rtems_event_send (modem_rx_task, INTERRUPT_EVENT); - break; - case 0x02: - /* - * Buffer transmitted ? - */ - if (*LSR & THRE) //if there is no transmission (and it shouldn't be) then send some bytes - { - maxonce=(xmt_len>14)?14:xmt_len; - if (maxonce>0) - { - for (i=0;i<maxonce;i++) - { - *THR=xmt_buf[xmt_start]; - xmt_start=(xmt_start+1)%MODEM_BUFFER_LENGTH; - } - xmt_len-=maxonce; - } - } - rtems_event_send (modem_tx_task, INTERRUPT_EVENT); - break; - case 0x00: - modem_status(); - break; - case 0x01: - return; - case 0x06: - ch=*RBR; - errcount++; - break; - - default: - break; - } - } -} - - -void modem_flush(int mode) -{ - if (mode&FWRITE) - { - } - if (mode&FREAD) - { - } - -} - - - -int modemWriteTermios(int minor, const char *buf, int len) -{ - int level; - int i,maxonce; - if (len<=0) - return 0; - - if (ModemData.t_line!=PPPDISC) - { - _CPU_ISR_Disable(level); - for(i=0;i<len;i++) - { - if (xmt_len>=MODEM_BUFFER_LENGTH) - break; - xmt_buf[(xmt_start+xmt_len)%MODEM_BUFFER_LENGTH]=buf[i]; - xmt_len++; - } - _CPU_ISR_Enable(level); - } - rtems_event_send(modem_tx_task,START_TRANSMIT_EVENT); - return i; -} - - -/* - * Initialize and register the device - */ -rtems_device_driver modem_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) -{ - rtems_status_code status; - rtems_isr_entry old_handler; - rtems_status_code sc; - rtems_termios_initialize (); - sc = rtems_semaphore_create ( - rtems_build_name ('M', 'D', 'M', 'P'), - 0, - RTEMS_COUNTING_SEMAPHORE, - RTEMS_NO_PRIORITY_CEILING, - &ModemData.pppsem); - if (sc != RTEMS_SUCCESSFUL) - rtems_fatal_error_occurred (sc); - modem_init(9600); - - sc = rtems_interrupt_catch (modemInterruptHandler, - PPC_IRQ_IRQ4, - &old_handler); - - /* - * Register the devices - */ - modem_tx_task=0; - modem_rx_task=0; - status = rtems_io_register_name ("/dev/modem", major, 0); - if (status != RTEMS_SUCCESSFUL) - rtems_fatal_error_occurred (status); - return RTEMS_SUCCESSFUL; -} - -rtems_device_driver modem_first_open( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - modem_tty=(struct rtems_termios_tty *)(((rtems_libio_open_close_args_t *)arg)->iop->data1); - return RTEMS_SUCCESSFUL; -} -rtems_device_driver modem_last_close( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - m823.siu.simask &=(~M823_SIMASK_IRM4); /* block the interrupts */ - return RTEMS_SUCCESSFUL; -} - -static int -modemSetAttr(int minor, const struct termios *t) -{ - int baud; - - switch (t->c_cflag & CBAUD) - { - case B50: - baud = 50; - break; - case B75: - baud = 75; - break; - case B110: - baud = 110; - break; - case B134: - baud = 134; - break; - case B150: - baud = 150; - break; - case B200: - baud = 200; - break; - case B300: - baud = 300; - break; - case B600: - baud = 600; - break; - case B1200: - baud = 1200; - break; - case B1800: - baud = 1800; - break; - case B2400: - baud = 2400; - break; - case B4800: - baud = 4800; - break; - case B9600: - baud = 9600; - break; - case B19200: - baud = 19200; - break; - case B38400: - baud = 38400; - break; - case B57600: - baud = 57600; - break; - case B115200: - baud = 115200; - break; - default: - baud = 0; - rtems_fatal_error_occurred (RTEMS_INTERNAL_ERROR); - return 0; - } - set_modem_speed(baud); - return RTEMS_SUCCESSFUL; -} - - -/* - * Open the device - */ - - - -rtems_device_driver modem_open( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - int error, s; - rtems_status_code status; - register struct ppp_softc *sc; - static rtems_termios_callbacks cb = - { - modem_first_open, /* firstOpen */ - modem_last_close, /* lastClose */ - NULL, /* poll read */ - modemWriteTermios, /* write */ - modemSetAttr, /* setAttributes */ - NULL, /* stopRemoteTx */ - NULL, /* startRemoteTx */ - 0 /* outputUsesInterrupts */ - }; - - if (ModemData.t_line == PPPDISC) - { - sc = ModemData.t_sc; - if (sc != NULL && sc->sc_devp == (void *) &ModemData) - { - return (0); - } - } - - if ((ModemData.t_sc= sc = pppalloc(1)) == NULL) - return 2; - - if (sc->sc_relinq) - (*sc->sc_relinq)(sc); /* get previous owner to relinquish the unit */ - - sc->sc_ilen = 0; - sc->sc_m = NULL; - bzero(sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); - sc->sc_asyncmap[0] = 0xffffffff; - sc->sc_asyncmap[3] = 0x60000000; - sc->sc_rasyncmap = 0; - sc->sc_devp = &ModemData; - sc->sc_start = pppasyncstart; - sc->sc_ctlp = pppasyncctlp; - sc->sc_relinq = pppasyncrelinq; - sc->sc_outm = NULL; - pppgetm(sc); - sc->sc_if.if_flags |= IFF_RUNNING; - sc->sc_if.if_baudrate = 38400; - - status = rtems_termios_open (major, minor, arg, &cb); - if(status != RTEMS_SUCCESSFUL) - { -/* printf("Error openning console device\n"); -*/ return status; - } - - -/* init rx and tx task for device */ - xmt_start=xmt_len=0; - rcv_start=rcv_len=0; - - if (modem_rx_task==0 && modem_tx_task==0) - { - rtems_status_code sc; - sc = rtems_task_create (rtems_build_name ('M', 'D', 't', 'x'), - 101, - 16*1024, - RTEMS_PREEMPT|RTEMS_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0), - RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL, - &modem_tx_task); - if (sc != RTEMS_SUCCESSFUL) { - - } - - sc = rtems_task_start (modem_tx_task, (void *)modem_txDaemon, 0); - if (sc != RTEMS_SUCCESSFUL) { - - } - - sc = rtems_task_create (rtems_build_name ('M', 'D', 'r', 'x'), - 101, - 16*1024, - RTEMS_PREEMPT|RTEMS_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0), - RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL, - &modem_rx_task); - if (sc != RTEMS_SUCCESSFUL) { - - } - - sc = rtems_task_start (modem_rx_task, (void *)modem_rxDaemon, 0); - if (sc != RTEMS_SUCCESSFUL) { - - } - - } - /* Enable modem interrupts */ - m823.siu.simask |= M823_SIMASK_IRM4; - - return RTEMS_SUCCESSFUL; -} - -/* - * Close the device - */ -rtems_device_driver modem_close( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - register struct ppp_softc *sc; - modem_flush( FREAD|FWRITE); - - ModemData.t_line = 0; - sc = ModemData.t_sc; - if (sc != NULL) { - ModemData.t_sc = NULL; - if (&ModemData == (struct tty *) sc->sc_devp) { - rtems_bsdnet_semaphore_obtain(); - pppasyncrelinq(sc); - pppdealloc(sc); - rtems_bsdnet_semaphore_release(); - } - } - return RTEMS_SUCCESSFUL; -} - -/* for now works only as serial device */ - - -rtems_device_driver modem_read( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - rtems_libio_rw_args_t *rw_args= (rtems_libio_rw_args_t *)arg; - char *buffer; - int count=0,maximum; - rtems_status_code sc; - - buffer = rw_args->buffer; - maximum = rw_args->count; - if (ModemData.t_line==PPPDISC) - { - - struct mbuf *m, *m0; - register int s; - int error = 0; - rtems_status_code status; - rtems_interval ticks; - register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc; - ticks=1000000/rtems_bsdnet_microseconds_per_tick; - - if (sc == NULL) - return 0; - /* - * Loop waiting for input, checking that nothing disasterous - * happens in the meantime. - */ - for (;;) { - if (sc->sc_inq.ifq_head != NULL) - { -/* printf("Read : Data are in the buffer\n"); -*/ break; - } -/* printf("Read : Waiting for data\n"); -*/ - status=rtems_semaphore_obtain(ModemData.pppsem,RTEMS_WAIT,ticks); - if (_modem_cd==0) - { - rw_args->bytes_moved =0; - return RTEMS_SUCCESSFUL; - } - - if (status==RTEMS_TIMEOUT) - return status; - } - rtems_bsdnet_semaphore_obtain(); - IF_DEQUEUE(&sc->sc_inq, m0); - rtems_bsdnet_semaphore_release(); - - for (m = m0; m && (count+m->m_next->m_len<maximum); m = m->m_next) /* check if packet will fit in buffer */ - { - memcpy(buffer,mtod(m, u_char *),m->m_len); - count+=m->m_len; - buffer+=m->m_len; - } - m_freem(m0); - rw_args->bytes_moved = count; - - } - else - sc = rtems_termios_read (arg); - - count=rw_args->bytes_moved; - return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; -} - -/* - * Write to the device - */ -rtems_device_driver modem_write( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - int count,len; - rtems_libio_rw_args_t *rw_args; - char *out_buffer; - int n,maximum; - rw_args = (rtems_libio_rw_args_t *) arg; - - out_buffer = rw_args->buffer; - maximum = rw_args->count; - - if (ModemData.t_line==PPPDISC) - { - register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc; - struct sockaddr dst; - struct mbuf *m, *m0, **mp; - rtems_bsdnet_semaphore_obtain(); - for (mp = &m0; maximum; mp = &m->m_next) - { - MGET(m, M_WAIT, MT_DATA); - if ((*mp = m) == NULL) - { - rtems_bsdnet_semaphore_release(); - m_freem(m0); - return (ENOBUFS); - } - m->m_len = 0; - if (maximum>= MCLBYTES / 2) - MCLGET(m, M_DONTWAIT); - len = M_TRAILINGSPACE(m); - if (len > maximum) - { - memcpy(mtod(m, u_char *),out_buffer,maximum); - m->m_len=maximum; - maximum=0; - } - else - { - memcpy(mtod(m, u_char *),out_buffer,len); - maximum-=len; - m->m_len=len; - out_buffer+=len; - } - } - - dst.sa_family = AF_UNSPEC; - bcopy(mtod(m0, u_char *), dst.sa_data, PPP_HDRLEN); - m0->m_data += PPP_HDRLEN; - m0->m_len -= PPP_HDRLEN; - -/* printf("Sending %d bytes \n",m0->m_len); -*/ n=pppoutput(&sc->sc_if, m0, &dst, (struct rtentry *)0); - rtems_bsdnet_semaphore_release(); - return n; - } - else - return rtems_termios_write (arg); -} - - - -/* - * Handle ioctl request. - * Should set hardware line speed, bits/char, etc. - */ -rtems_device_driver modem_control( - rtems_device_major_number major, - rtems_device_minor_number minor, - void * arg -) -{ - rtems_libio_ioctl_args_t *args=(rtems_libio_ioctl_args_t *)arg; - struct ppp_softc *sc=ModemData.t_sc; - int cmd; - caddr_t data; - int error=RTEMS_SUCCESSFUL; - - data=args->buffer; - cmd=args->command; - - switch (cmd) { - case RTEMS_IO_GET_ATTRIBUTES: - case RTEMS_IO_SET_ATTRIBUTES: - case RTEMS_IO_TCDRAIN: - return rtems_termios_ioctl (arg); - break; - case PPPIOCSASYNCMAP: - sc->sc_asyncmap[0] = *(u_int *)data; - break; - - case PPPIOCGASYNCMAP: - *(u_int *)data = sc->sc_asyncmap[0]; - break; - - case PPPIOCSRASYNCMAP: - sc->sc_rasyncmap = *(u_int *)data; - break; - - case TIOCSETD: - ModemData.t_line=*(int*)data; - break; - case TIOCGETD: - *(int*)data=ModemData.t_line; - break; - case TIOCMBIS: - if ((*(int*)data)&TIOCM_DTR) - set_modem_dtr(1); - break; - case TIOCMBIC: - if ((*(int*)data)&TIOCM_DTR) - set_modem_dtr(0); - break; - case PPPIOCGRASYNCMAP: - *(u_int *)data = sc->sc_rasyncmap; - break; - - case PPPIOCSXASYNCMAP: - bcopy(data, sc->sc_asyncmap, sizeof(sc->sc_asyncmap)); - sc->sc_asyncmap[1] = 0; /* mustn't escape 0x20 - 0x3f */ - sc->sc_asyncmap[2] &= ~0x40000000; /* mustn't escape 0x5e */ - sc->sc_asyncmap[3] |= 0x60000000; /* must escape 0x7d, 0x7e */ - break; - - case PPPIOCGXASYNCMAP: - bcopy(sc->sc_asyncmap, data, sizeof(sc->sc_asyncmap)); - break; - - default: - rtems_bsdnet_semaphore_obtain(); - error = pppioctl(sc, cmd, data, 0, NULL); - if (error == 0 && cmd == PPPIOCSMRU) - pppgetm(sc); - rtems_bsdnet_semaphore_release(); - - } - return error; - -} - - - -void -wait_input(timo) - struct timeval *timo; -{ - int n; - rtems_event_set events; - rtems_interval ticks; - rtems_status_code err; - int num_wait=1; - register struct ppp_softc *sc = (struct ppp_softc *)ModemData.t_sc; - ticks = 1+(timo->tv_sec*1000000+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick; - while (num_wait) - { - - if (sc->sc_inq.ifq_head != NULL) - break; -/* printf("Wait : Waiting for data for %d ticks\n",ticks); -*/ err=rtems_semaphore_obtain(ModemData.pppsem,RTEMS_WAIT,ticks); - if (err==RTEMS_TIMEOUT) - { -/* printf("TIMEOUT : No data\n"); -*/ break; - } - } - -} |