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NetBSD/sys/dev/ic/isic_l1.c

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/* $NetBSD: isic_l1.c,v 1.18 2008/04/08 12:07:26 cegger Exp $ */
/*
* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: isic_l1.c,v 1.18 2008/04/08 12:07:26 cegger Exp $");
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/callout.h>
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_trace.h>
#include <netisdn/i4b_l2.h>
#include <netisdn/i4b_l1l2.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_global.h>
#include <dev/ic/isic_l1.h>
#include <dev/ic/isac.h>
#include <dev/ic/ipac.h>
#include <dev/ic/hscx.h>
#include "nisac.h"
#include "nisacsx.h"
unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT;
static int isic_std_ph_data_req(isdn_layer1token, struct mbuf *, int);
static int isic_std_ph_activate_req(isdn_layer1token);
static int isic_std_mph_command_req(isdn_layer1token, int, void*);
static void isic_enable_intr(struct isic_softc *sc, int enable);
const struct isdn_layer1_isdnif_driver isic_std_driver = {
isic_std_ph_data_req,
isic_std_ph_activate_req,
isic_std_mph_command_req
};
/* from i4btrc driver i4b_trace.c */
extern int get_trace_data_from_l1(int unit, int what, int len, char *buf);
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-DATA-REQUEST
* =========================
*
* parms:
* token softc of physical driver
* m mbuf containing L2 frame to be sent out
* freeflag MBUF_FREE: free mbuf here after having sent
* it out
* MBUF_DONTFREE: mbuf is freed by Layer 2
* returns:
* ==0 fail, nothing sent out
* !=0 ok, frame sent out
*
*---------------------------------------------------------------------------*/
static int
isic_std_ph_data_req(isdn_layer1token token, struct mbuf *m, int freeflag)
{
struct isic_softc *sc = (struct isic_softc*)token;
u_char cmd;
int s;
if (m == NULL) /* failsafe */
return (0);
s = splnet();
if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */
{
NDBGL1(L1_I_ERR, "still in state F3!");
isic_std_ph_activate_req(token);
}
if(sc->sc_state & ISAC_TX_ACTIVE)
{
if(sc->sc_obuf2 == NULL)
{
sc->sc_obuf2 = m; /* save mbuf ptr */
if(freeflag)
sc->sc_freeflag2 = 1; /* IRQ must mfree */
else
sc->sc_freeflag2 = 0; /* IRQ must not mfree */
NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", isic_printstate(sc));
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr hdr;
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, m->m_len, m->m_data);
}
splx(s);
return(1);
}
NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", isic_printstate(sc));
if(freeflag == MBUF_FREE)
i4b_Dfreembuf(m);
splx(s);
return (0);
}
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr hdr;
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
isdn_layer2_trace_ind(&sc->sc_l2, sc->sc_l3token, &hdr, m->m_len, m->m_data);
}
sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
sc->sc_freeflag = 0; /* IRQ must NOT mfree */
ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */
{
sc->sc_obuf = m; /* save mbuf ptr */
sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */
sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */
if(freeflag)
sc->sc_freeflag = 1; /* IRQ must mfree */
cmd = ISAC_CMDR_XTF;
}
else
{
sc->sc_obuf = NULL;
sc->sc_op = NULL;
sc->sc_ol = 0;
if(freeflag)
i4b_Dfreembuf(m);
cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
}
ISAC_WRITE(I_CMDR, cmd);
ISACCMDRWRDELAY();
splx(s);
return(1);
}
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-ACTIVATE-REQUEST
* =============================
*
* parms:
* token softc of physical interface
*
* returns:
* ==0
* !=0
*
*---------------------------------------------------------------------------*/
static int
isic_std_ph_activate_req(isdn_layer1token token)
{
struct isic_softc *sc = (struct isic_softc*)token;
NDBGL1(L1_PRIM, " %s ", device_xname(&sc->sc_dev));
isic_next_state(sc, EV_PHAR);
return(0);
}
/*---------------------------------------------------------------------------*
* command from the upper layers
*---------------------------------------------------------------------------*/
static int
isic_std_mph_command_req(isdn_layer1token token, int command, void *parm)
{
struct isic_softc *sc = (struct isic_softc*)token;
int s, pass_down = 0;
s = splnet();
switch(command)
{
case CMR_DOPEN: /* daemon running */
NDBGL1(L1_PRIM, "%s, command = CMR_DOPEN", device_xname(&sc->sc_dev));
sc->sc_intr_valid = ISIC_INTR_VALID;
pass_down = 1;
break;
case CMR_DCLOSE: /* daemon not running */
NDBGL1(L1_PRIM, "%s, command = CMR_DCLOSE", device_xname(&sc->sc_dev));
sc->sc_intr_valid = ISIC_INTR_DISABLED;
isic_enable_intr(sc, 0);
pass_down = 1;
break;
case CMR_SETLEDS:
pass_down = 1;
break;
case CMR_SETTRACE:
NDBGL1(L1_PRIM, "%s, command = CMR_SETTRACE, parm = %p", device_xname(&sc->sc_dev), parm);
sc->sc_trace = (int)(unsigned long)parm;
break;
default:
NDBGL1(L1_ERROR, "ERROR, unknown command = %d, %s, parm = %p", command, device_xname(&sc->sc_dev), parm);
break;
}
if (pass_down && sc->drv_command != NULL)
sc->drv_command(sc, command, parm);
if (command == CMR_DOPEN)
isic_enable_intr(sc, 1);
splx(s);
return(0);
}
static void
isic_enable_intr(struct isic_softc *sc, int enable)
{
#if NNISACSX > 0
if (sc->sc_cardtyp == CARD_TYPEP_AVMA1PCIV2) {
if (enable)
isic_isacsx_init(sc);
else isic_isacsx_disable_intr(sc);
return;
}
#endif /* NNISACSX > 0 */
#if NNISAC > 0
if (enable) {
isic_isac_init(sc);
} else {
/* disable receiver */
ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_DIM0);
/* mask interrupts */
if (sc->sc_ipac) {
IPAC_WRITE(IPAC_MASK, 0xff);
} else {
ISAC_WRITE(I_MASK, 0xff);
}
}
#endif /* NNISAC > 0 */
}
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