281 lines
7.2 KiB
C
281 lines
7.2 KiB
C
/* $NetBSD: isic_l1.c,v 1.12 2002/05/21 10:31:12 martin Exp $ */
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/*
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* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: isic_l1.c,v 1.12 2002/05/21 10:31:12 martin Exp $");
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <machine/bus.h>
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#include <sys/device.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <sys/callout.h>
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#include <netisdn/i4b_debug.h>
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#include <netisdn/i4b_ioctl.h>
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#include <netisdn/i4b_trace.h>
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#include <netisdn/i4b_l2.h>
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#include <netisdn/i4b_l1l2.h>
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#include <netisdn/i4b_mbuf.h>
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#include <netisdn/i4b_global.h>
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#include <dev/ic/isic_l1.h>
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#include <dev/ic/isac.h>
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#include <dev/ic/ipac.h>
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#include <dev/ic/hscx.h>
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unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT;
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static int isic_std_ph_data_req(isdn_layer1token, struct mbuf *, int);
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static int isic_std_ph_activate_req(isdn_layer1token);
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static int isic_std_mph_command_req(isdn_layer1token, int, void*);
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static void isic_enable_intr(struct isic_softc *sc, int enable);
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const struct isdn_layer1_bri_driver isic_std_driver = {
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isic_std_ph_data_req,
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isic_std_ph_activate_req,
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isic_std_mph_command_req
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};
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/* from i4btrc driver i4b_trace.c */
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extern int get_trace_data_from_l1(int unit, int what, int len, char *buf);
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/*---------------------------------------------------------------------------*
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*
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* L2 -> L1: PH-DATA-REQUEST
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* =========================
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*
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* parms:
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* token softc of physical driver
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* m mbuf containing L2 frame to be sent out
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* freeflag MBUF_FREE: free mbuf here after having sent
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* it out
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* MBUF_DONTFREE: mbuf is freed by Layer 2
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* returns:
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* ==0 fail, nothing sent out
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* !=0 ok, frame sent out
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*
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*---------------------------------------------------------------------------*/
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static int
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isic_std_ph_data_req(isdn_layer1token token, struct mbuf *m, int freeflag)
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{
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struct isic_softc *sc = (struct isic_softc*)token;
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u_char cmd;
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int s;
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if (m == NULL) /* failsafe */
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return (0);
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s = splnet();
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if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */
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{
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NDBGL1(L1_I_ERR, "still in state F3!");
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isic_std_ph_activate_req(token);
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}
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if(sc->sc_state & ISAC_TX_ACTIVE)
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{
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if(sc->sc_obuf2 == NULL)
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{
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sc->sc_obuf2 = m; /* save mbuf ptr */
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if(freeflag)
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sc->sc_freeflag2 = 1; /* IRQ must mfree */
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else
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sc->sc_freeflag2 = 0; /* IRQ must not mfree */
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NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", isic_printstate(sc));
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if(sc->sc_trace & TRACE_D_TX)
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{
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i4b_trace_hdr hdr;
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hdr.type = TRC_CH_D;
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hdr.dir = FROM_TE;
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hdr.count = ++sc->sc_trace_dcount;
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isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, m->m_len, m->m_data);
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}
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splx(s);
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return(1);
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}
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NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", isic_printstate(sc));
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if(freeflag == MBUF_FREE)
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i4b_Dfreembuf(m);
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splx(s);
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return (0);
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}
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if(sc->sc_trace & TRACE_D_TX)
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{
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i4b_trace_hdr hdr;
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hdr.type = TRC_CH_D;
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hdr.dir = FROM_TE;
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hdr.count = ++sc->sc_trace_dcount;
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isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, m->m_len, m->m_data);
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}
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sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
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NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
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sc->sc_freeflag = 0; /* IRQ must NOT mfree */
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ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
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if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */
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{
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sc->sc_obuf = m; /* save mbuf ptr */
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sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */
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sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */
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if(freeflag)
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sc->sc_freeflag = 1; /* IRQ must mfree */
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cmd = ISAC_CMDR_XTF;
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}
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else
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{
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sc->sc_obuf = NULL;
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sc->sc_op = NULL;
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sc->sc_ol = 0;
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if(freeflag)
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i4b_Dfreembuf(m);
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cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
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}
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ISAC_WRITE(I_CMDR, cmd);
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ISACCMDRWRDELAY();
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splx(s);
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return(1);
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}
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/*---------------------------------------------------------------------------*
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*
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* L2 -> L1: PH-ACTIVATE-REQUEST
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* =============================
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*
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* parms:
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* token softc of physical interface
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*
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* returns:
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* ==0
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* !=0
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*
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*---------------------------------------------------------------------------*/
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static int
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isic_std_ph_activate_req(isdn_layer1token token)
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{
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struct isic_softc *sc = (struct isic_softc*)token;
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NDBGL1(L1_PRIM, " %s ", sc->sc_dev.dv_xname);
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isic_next_state(sc, EV_PHAR);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* command from the upper layers
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*---------------------------------------------------------------------------*/
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static int
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isic_std_mph_command_req(isdn_layer1token token, int command, void *parm)
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{
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struct isic_softc *sc = (struct isic_softc*)token;
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int s, pass_down = 0;
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s = splnet();
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switch(command)
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{
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case CMR_DOPEN: /* daemon running */
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NDBGL1(L1_PRIM, "%s, command = CMR_DOPEN", sc->sc_dev.dv_xname);
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sc->sc_intr_valid = ISIC_INTR_VALID;
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pass_down = 1;
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break;
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case CMR_DCLOSE: /* daemon not running */
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NDBGL1(L1_PRIM, "%s, command = CMR_DCLOSE", sc->sc_dev.dv_xname);
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sc->sc_intr_valid = ISIC_INTR_DISABLED;
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isic_enable_intr(sc, 0);
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pass_down = 1;
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break;
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case CMR_SETLEDS:
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pass_down = 1;
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break;
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case CMR_SETTRACE:
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NDBGL1(L1_PRIM, "%s, command = CMR_SETTRACE, parm = %p", sc->sc_dev.dv_xname, parm);
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sc->sc_trace = (int)(unsigned long)parm;
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break;
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default:
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NDBGL1(L1_ERROR, "ERROR, unknown command = %d, %s, parm = %p", command, sc->sc_dev.dv_xname, parm);
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break;
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}
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if (pass_down && sc->drv_command != NULL)
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sc->drv_command(sc, command, parm);
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if (command == CMR_DOPEN)
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isic_enable_intr(sc, 1);
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splx(s);
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return(0);
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}
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static void
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isic_enable_intr(struct isic_softc *sc, int enable)
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{
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if (enable) {
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isic_isac_init(sc);
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} else {
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/* disable receiver */
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ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_DIM0);
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/* mask interrupts */
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if (sc->sc_ipac) {
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IPAC_WRITE(IPAC_MASK, 0xff);
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} else {
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ISAC_WRITE(I_MASK, 0xff);
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}
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}
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}
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