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freebsd/sys/i4b/layer1/ifpi2/i4b_ifpi2_pci.c
Gary Jennejohn c0a06166a0 Fix a problem which could cause some machines to hang after a warm boot. 
This should be in 4.6.

Submitted by:	Ari Suutari <ari.suutari@syncrontech.com>
2002-05-10 12:04:04 +00:00

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/*
* Copyright (c) 2001 Gary Jennejohn. 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* 4. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software and/or documentation.
*
* 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.
*
*---------------------------------------------------------------------------
*
* i4b_ifpi2_pci.c: AVM Fritz!Card PCI hardware driver
* --------------------------------------------------
*
* $Id$
*
* $FreeBSD$
*
*
*---------------------------------------------------------------------------*/
#include "ifpi2.h"
#include "opt_i4b.h"
#include "pci.h"
#if (NIFPI2 > 0) && (NPCI > 0)
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <machine/bus.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <sys/socket.h>
#include <net/if.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_trace.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/layer1/i4b_l1.h>
#include <i4b/layer1/isic/i4b_isic.h>
/*#include <i4b/layer1/isic/i4b_isac.h>*/
#include <i4b/layer1/isic/i4b_hscx.h>
#include <i4b/layer1/ifpi2/i4b_ifpi2_ext.h>
#include <i4b/layer1/ifpi2/i4b_ifpi2_isacsx.h>
#define PCI_AVMA1_VID 0x1244
#define PCI_AVMA1_V2_DID 0x0e00
/* prototypes */
static void avma1pp2_disable(device_t);
static void avma1pp2_intr(void *);
static void hscx_write_reg(int, u_int, struct l1_softc *);
static u_char hscx_read_reg(int, struct l1_softc *);
static u_int hscx_read_reg_int(int, struct l1_softc *);
static void hscx_read_fifo(int, void *, size_t, struct l1_softc *);
static void hscx_write_fifo(int, void *, size_t, struct l1_softc *);
static void avma1pp2_hscx_int_handler(struct l1_softc *);
static void avma1pp2_hscx_intr(int, u_int, struct l1_softc *);
static void avma1pp2_init_linktab(struct l1_softc *);
static void avma1pp2_bchannel_setup(int, int, int, int);
static void avma1pp2_bchannel_start(int, int);
static void avma1pp2_hscx_init(struct l1_softc *, int, int);
static void avma1pp2_bchannel_stat(int, int, bchan_statistics_t *);
static void avma1pp2_set_linktab(int, int, drvr_link_t *);
static isdn_link_t * avma1pp2_ret_linktab(int, int);
static int avma1pp2_pci_probe(device_t);
static int avma1pp2_hscx_fifo(l1_bchan_state_t *, struct l1_softc *);
int avma1pp2_attach_avma1pp(device_t);
static void ifpi2_isacsx_intr(struct l1_softc *sc);
static device_method_t avma1pp2_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, avma1pp2_pci_probe),
DEVMETHOD(device_attach, avma1pp2_attach_avma1pp),
DEVMETHOD(device_shutdown, avma1pp2_disable),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
{ 0, 0 }
};
static driver_t avma1pp2_pci_driver = {
"ifpi2-",
avma1pp2_pci_methods,
sizeof(struct l1_softc)
};
static devclass_t avma1pp2_pci_devclass;
DRIVER_MODULE(avma1pp2, pci, avma1pp2_pci_driver, avma1pp2_pci_devclass, 0, 0);
/* jump table for multiplex routines */
struct i4b_l1mux_func avma1pp2_l1mux_func = {
avma1pp2_ret_linktab,
avma1pp2_set_linktab,
ifpi2_mph_command_req,
ifpi2_ph_data_req,
ifpi2_ph_activate_req,
};
struct l1_softc *ifpi2_scp[IFPI2_MAXUNIT];
/*---------------------------------------------------------------------------*
* AVM PCI Fritz!Card V. 2 special registers
*---------------------------------------------------------------------------*/
/*
* AVM PCI Status Latch 0 read only bits
*/
#define ASL_IRQ_ISAC 0x01 /* ISAC interrupt, active high */
#define ASL_IRQ_HSCX 0x02 /* HSX interrupt, active high */
#define ASL_IRQ_TIMER 0x04 /* Timer interrupt, active high */
#define ASL_IRQ_BCHAN ASL_IRQ_HSCX
/* actually active high */
#define ASL_IRQ_Pending (ASL_IRQ_ISAC | ASL_IRQ_HSCX | ASL_IRQ_TIMER)
/*
* AVM PCI Status Latch 0 read only bits
*/
#define ASL_TIMERRESET 0x04
#define ASL_ENABLE_INT 0x08
/*
* "HSCX" status bits
*/
#define HSCX_STAT_RME 0x01
#define HSCX_STAT_RDO 0x10
#define HSCX_STAT_CRCVFRRAB 0x0E
#define HSCX_STAT_CRCVFR 0x06
#define HSCX_STAT_RML_MASK 0x3f00
/*
* "HSCX" interrupt bits
*/
#define HSCX_INT_XPR 0x80
#define HSCX_INT_XDU 0x40
#define HSCX_INT_RPR 0x20
#define HSCX_INT_MASK 0xE0
/*
* "HSCX" command bits
*/
#define HSCX_CMD_XRS 0x80
#define HSCX_CMD_XME 0x01
#define HSCX_CMD_RRS 0x20
#define HSCX_CMD_XML_MASK 0x3f00
/* "HSCX" mode bits */
#define HSCX_MODE_ITF_FLG 0x01
#define HSCX_MODE_TRANS 0x02
/* offsets to various registers in the ASIC, evidently */
#define STAT0_OFFSET 0x02
#define HSCX_FIFO1 0x10
#define HSCX_FIFO2 0x18
#define HSCX_STAT1 0x14
#define HSCX_STAT2 0x1c
#define ISACSX_INDEX 0x04
#define ISACSX_DATA 0x08
/*
* Commands and parameters are sent to the "HSCX" as a long, but the
* fields are handled as bytes.
*
* The long contains:
* (prot << 16)|(txl << 8)|cmd
*
* where:
* prot = protocol to use
* txl = transmit length
* cmd = the command to be executed
*
* The fields are defined as u_char in struct l1_softc.
*
* Macro to coalesce the byte fields into a u_int
*/
#define AVMA1PPSETCMDLONG(f) (f) = ((sc->avma1pp_cmd) | (sc->avma1pp_txl << 8) \
| (sc->avma1pp_prot << 16))
/*
* to prevent deactivating the "HSCX" when both channels are active we
* define an HSCX_ACTIVE flag which is or'd into the channel's state
* flag in avma1pp2_bchannel_setup upon active and cleared upon deactivation.
* It is set high to allow room for new flags.
*/
#define HSCX_AVMA1PP_ACTIVE 0x1000
/*---------------------------------------------------------------------------*
* AVM read fifo routines
*---------------------------------------------------------------------------*/
static void
avma1pp2_read_fifo(struct l1_softc *sc, int what, void *buf, size_t size)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
int i;
switch (what) {
case ISIC_WHAT_ISAC:
bus_space_write_4(btag, bhandle, ISACSX_INDEX, 0);
/* evidently each byte must be read as a long */
for (i = 0; i < size; i++)
((u_int8_t *)buf)[i] = (u_int8_t)bus_space_read_4(btag, bhandle, ISACSX_DATA);
break;
case ISIC_WHAT_HSCXA:
hscx_read_fifo(0, buf, size, sc);
break;
case ISIC_WHAT_HSCXB:
hscx_read_fifo(1, buf, size, sc);
break;
}
}
static void
hscx_read_fifo(int chan, void *buf, size_t len, struct l1_softc *sc)
{
u_int32_t *ip;
size_t cnt;
int dataoff;
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
dataoff = chan ? HSCX_FIFO2 : HSCX_FIFO1;
ip = (u_int32_t *)buf;
cnt = 0;
/* what if len isn't a multiple of sizeof(int) and buf is */
/* too small ???? */
while (cnt < len)
{
*ip++ = bus_space_read_4(btag, bhandle, dataoff);
cnt += 4;
}
}
/*---------------------------------------------------------------------------*
* AVM write fifo routines
*---------------------------------------------------------------------------*/
static void
avma1pp2_write_fifo(struct l1_softc *sc, int what, void *buf, size_t size)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
int i;
switch (what) {
case ISIC_WHAT_ISAC:
bus_space_write_4(btag, bhandle, ISACSX_INDEX, 0);
/* evidently each byte must written as a long */
for (i = 0; i < size; i++)
bus_space_write_4(btag, bhandle, ISACSX_DATA, ((unsigned char *)buf)[i]);
break;
case ISIC_WHAT_HSCXA:
hscx_write_fifo(0, buf, size, sc);
break;
case ISIC_WHAT_HSCXB:
hscx_write_fifo(1, buf, size, sc);
break;
}
}
static void
hscx_write_fifo(int chan, void *buf, size_t len, struct l1_softc *sc)
{
u_int32_t *ip;
size_t cnt;
int dataoff;
l1_bchan_state_t *Bchan = &sc->sc_chan[chan];
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
dataoff = chan ? HSCX_FIFO2 : HSCX_FIFO1;
sc->avma1pp_cmd &= ~HSCX_CMD_XME;
sc->avma1pp_txl = 0;
if (Bchan->out_mbuf_cur == NULL)
{
if (Bchan->bprot != BPROT_NONE)
sc->avma1pp_cmd |= HSCX_CMD_XME;
}
if (len != sc->sc_bfifolen)
sc->avma1pp_txl = len;
cnt = 0; /* borrow cnt */
AVMA1PPSETCMDLONG(cnt);
hscx_write_reg(chan, cnt, sc);
ip = (u_int32_t *)buf;
cnt = 0;
while (cnt < len)
{
bus_space_write_4(btag, bhandle, dataoff, *ip);
ip++;
cnt += 4;
}
}
/*---------------------------------------------------------------------------*
* AVM write register routines
*---------------------------------------------------------------------------*/
static void
avma1pp2_write_reg(struct l1_softc *sc, int what, bus_size_t offs, u_int8_t data)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
switch (what) {
case ISIC_WHAT_ISAC:
bus_space_write_4(btag, bhandle, ISACSX_INDEX, offs);
bus_space_write_4(btag, bhandle, ISACSX_DATA, data);
break;
case ISIC_WHAT_HSCXA:
hscx_write_reg(0, data, sc);
break;
case ISIC_WHAT_HSCXB:
hscx_write_reg(1, data, sc);
break;
}
}
static void
hscx_write_reg(int chan, u_int val, struct l1_softc *sc)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
u_int off;
off = (chan == 0 ? HSCX_STAT1 : HSCX_STAT2);
bus_space_write_4(btag, bhandle, off, val);
}
/*---------------------------------------------------------------------------*
* AVM read register routines
*---------------------------------------------------------------------------*/
static u_int8_t
avma1pp2_read_reg(struct l1_softc *sc, int what, bus_size_t offs)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
u_int8_t val;
switch (what) {
case ISIC_WHAT_ISAC:
bus_space_write_4(btag, bhandle, ISACSX_INDEX, offs);
val = (u_int8_t)bus_space_read_4(btag, bhandle, ISACSX_DATA);
return(val);
case ISIC_WHAT_HSCXA:
return hscx_read_reg(0, sc);
case ISIC_WHAT_HSCXB:
return hscx_read_reg(1, sc);
}
return 0;
}
static u_char
hscx_read_reg(int chan, struct l1_softc *sc)
{
return(hscx_read_reg_int(chan, sc) & 0xff);
}
/*
* need to be able to return an int because the RBCH is in the 2nd
* byte.
*/
static u_int
hscx_read_reg_int(int chan, struct l1_softc *sc)
{
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
u_int off;
off = (chan == 0 ? HSCX_STAT1 : HSCX_STAT2);
return(bus_space_read_4(btag, bhandle, off));
}
/*---------------------------------------------------------------------------*
* avma1pp2_probe - probe for a card
*---------------------------------------------------------------------------*/
static int
avma1pp2_pci_probe(dev)
device_t dev;
{
u_int16_t did, vid;
vid = pci_get_vendor(dev);
did = pci_get_device(dev);
if ((vid == PCI_AVMA1_VID) && (did == PCI_AVMA1_V2_DID)) {
device_set_desc(dev, "AVM Fritz!Card PCI Version 2");
return(0);
}
return(ENXIO);
}
/*---------------------------------------------------------------------------*
* avma1pp2_attach_avma1pp - attach Fritz!Card PCI
*---------------------------------------------------------------------------*/
int
avma1pp2_attach_avma1pp(device_t dev)
{
struct l1_softc *sc;
u_int v;
int unit, error = 0;
int s;
u_int16_t did, vid;
void *ih = 0;
bus_space_handle_t bhandle;
bus_space_tag_t btag;
l1_bchan_state_t *chan;
s = splimp();
vid = pci_get_vendor(dev);
did = pci_get_device(dev);
sc = device_get_softc(dev);
unit = device_get_unit(dev);
bzero(sc, sizeof(struct l1_softc));
/* probably not really required */
if(unit > IFPI2_MAXUNIT) {
printf("ifpi2-%d: Error, unit > IFPI_MAXUNIT!\n", unit);
splx(s);
return(ENXIO);
}
if ((vid != PCI_AVMA1_VID) && (did != PCI_AVMA1_V2_DID)) {
printf("ifpi2-%d: unknown device!?\n", unit);
goto fail;
}
ifpi2_scp[unit] = sc;
sc->sc_resources.io_rid[0] = PCIR_MAPS+4;
sc->sc_resources.io_base[0] = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->sc_resources.io_rid[0],
0, ~0, 1, RF_ACTIVE);
if (sc->sc_resources.io_base[0] == NULL) {
printf("ifpi2-%d: couldn't map IO port\n", unit);
error = ENXIO;
goto fail;
}
bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
btag = rman_get_bustag(sc->sc_resources.io_base[0]);
/* Allocate interrupt */
sc->sc_resources.irq_rid = 0;
sc->sc_resources.irq = bus_alloc_resource(dev, SYS_RES_IRQ,
&sc->sc_resources.irq_rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE);
if (sc->sc_resources.irq == NULL) {
bus_release_resource(dev, SYS_RES_IOPORT, PCIR_MAPS+4, sc->sc_resources.io_base[0]);
printf("ifpi2-%d: couldn't map interrupt\n", unit);
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->sc_resources.irq, INTR_TYPE_NET, avma1pp2_intr, sc, &ih);
if (error) {
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_resources.irq);
bus_release_resource(dev, SYS_RES_IOPORT, PCIR_MAPS+4, sc->sc_resources.io_base[0]);
printf("ifpi2-%d: couldn't set up irq\n", unit);
goto fail;
}
sc->sc_unit = unit;
/* end of new-bus stuff */
ISAC_BASE = (caddr_t)ISIC_WHAT_ISAC;
HSCX_A_BASE = (caddr_t)ISIC_WHAT_HSCXA;
HSCX_B_BASE = (caddr_t)ISIC_WHAT_HSCXB;
/* setup access routines */
sc->clearirq = NULL;
sc->readreg = avma1pp2_read_reg;
sc->writereg = avma1pp2_write_reg;
sc->readfifo = avma1pp2_read_fifo;
sc->writefifo = avma1pp2_write_fifo;
/* setup card type */
sc->sc_cardtyp = CARD_TYPEP_AVMA1PCI_V2;
/* setup IOM bus type */
sc->sc_bustyp = BUS_TYPE_IOM2;
/* set up some other miscellaneous things */
sc->sc_ipac = 0;
sc->sc_bfifolen = HSCX_FIFO_LEN;
/* reset the card */
/* the Linux driver does this to clear any pending ISAC interrupts */
v = 0;
v = ISAC_READ(I_RMODED);
#ifdef AVMA1PCI_V2_DEBUG
printf("avma1pp2_attach: I_MODED %x...", v);
#endif
v = ISAC_READ(I_ISTAD);
#ifdef AVMA1PCI_V2_DEBUG
printf("avma1pp2_attach: I_ISTAD %x...", v);
#endif
v = ISAC_READ(I_ISTA);
#ifdef AVMA1PCI_V2_DEBUG
printf("avma1pp2_attach: I_ISTA %x...", v);
#endif
ISAC_WRITE(I_MASKD, 0xff);
ISAC_WRITE(I_MASK, 0xff);
/* the Linux driver does this to clear any pending HSCX interrupts */
v = hscx_read_reg_int(0, sc);
#ifdef AVMA1PCI_V2_DEBUG
printf("avma1pp2_attach: 0 HSCX_STAT %x...", v);
#endif
v = hscx_read_reg_int(1, sc);
#ifdef AVMA1PCI_V2_DEBUG
printf("avma1pp2_attach: 1 HSCX_STAT %x\n", v);
#endif
bus_space_write_1(btag, bhandle, STAT0_OFFSET, ASL_TIMERRESET);
DELAY(SEC_DELAY/100); /* 10 ms */
bus_space_write_1(btag, bhandle, STAT0_OFFSET, ASL_ENABLE_INT);
DELAY(SEC_DELAY/100); /* 10 ms */
/* from here to the end would normally be done in isic_pciattach */
printf("ifpi2-%d: ISACSX %s\n", unit, "PSB3186");
/* init the ISAC */
ifpi2_isacsx_init(sc);
#if defined (__FreeBSD__) && __FreeBSD__ > 4
/* Init the channel mutexes */
chan = &sc->sc_chan[HSCX_CH_A];
if(!mtx_initialized(&chan->rx_queue.ifq_mtx))
mtx_init(&chan->rx_queue.ifq_mtx, "i4b_avma1pp2_rx", NULL, MTX_DEF);
if(!mtx_initialized(&chan->tx_queue.ifq_mtx))
mtx_init(&chan->tx_queue.ifq_mtx, "i4b_avma1pp2_tx", NULL, MTX_DEF);
chan = &sc->sc_chan[HSCX_CH_B];
if(!mtx_initialized(&chan->rx_queue.ifq_mtx))
mtx_init(&chan->rx_queue.ifq_mtx, "i4b_avma1pp2_rx", NULL, MTX_DEF);
if(!mtx_initialized(&chan->tx_queue.ifq_mtx))
mtx_init(&chan->tx_queue.ifq_mtx, "i4b_avma1pp2_tx", NULL, MTX_DEF);
#endif
/* init the "HSCX" */
avma1pp2_bchannel_setup(sc->sc_unit, HSCX_CH_A, BPROT_NONE, 0);
avma1pp2_bchannel_setup(sc->sc_unit, HSCX_CH_B, BPROT_NONE, 0);
/* can't use the normal B-Channel stuff */
avma1pp2_init_linktab(sc);
/* set trace level */
sc->sc_trace = TRACE_OFF;
sc->sc_state = ISAC_IDLE;
sc->sc_ibuf = NULL;
sc->sc_ib = NULL;
sc->sc_ilen = 0;
sc->sc_obuf = NULL;
sc->sc_op = NULL;
sc->sc_ol = 0;
sc->sc_freeflag = 0;
sc->sc_obuf2 = NULL;
sc->sc_freeflag2 = 0;
#if defined(__FreeBSD__) && __FreeBSD__ >=3
callout_handle_init(&sc->sc_T3_callout);
callout_handle_init(&sc->sc_T4_callout);
#endif
/* init higher protocol layers */
i4b_l1_mph_status_ind(L0IFPI2UNIT(sc->sc_unit), STI_ATTACH, sc->sc_cardtyp, &avma1pp2_l1mux_func);
fail:
splx(s);
return(error);
}
/*
* this is the real interrupt routine
*/
static void
avma1pp2_hscx_intr(int h_chan, u_int stat, struct l1_softc *sc)
{
register l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
int activity = -1;
u_int param = 0;
NDBGL1(L1_H_IRQ, "%#x", stat);
if((stat & HSCX_INT_XDU) && (chan->bprot != BPROT_NONE))/* xmit data underrun */
{
chan->stat_XDU++;
NDBGL1(L1_H_XFRERR, "xmit data underrun");
/* abort the transmission */
sc->avma1pp_txl = 0;
sc->avma1pp_cmd |= HSCX_CMD_XRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd &= ~HSCX_CMD_XRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
if (chan->out_mbuf_head != NULL) /* don't continue to transmit this buffer */
{
i4b_Bfreembuf(chan->out_mbuf_head);
chan->out_mbuf_cur = chan->out_mbuf_head = NULL;
}
}
/*
* The following is based on examination of the Linux driver.
*
* The logic here is different than with a "real" HSCX; all kinds
* of information (interrupt/status bits) are in stat.
* HSCX_INT_RPR indicates a receive interrupt
* HSCX_STAT_RDO indicates an overrun condition, abort -
* otherwise read the bytes ((stat & HSCX_STZT_RML_MASK) >> 8)
* HSCX_STAT_RME indicates end-of-frame and apparently any
* CRC/framing errors are only reported in this state.
* if ((stat & HSCX_STAT_CRCVFRRAB) != HSCX_STAT_CRCVFR)
* CRC/framing error
*/
if(stat & HSCX_INT_RPR)
{
register int fifo_data_len;
int error = 0;
/* always have to read the FIFO, so use a scratch buffer */
u_char scrbuf[HSCX_FIFO_LEN];
if(stat & HSCX_STAT_RDO)
{
chan->stat_RDO++;
NDBGL1(L1_H_XFRERR, "receive data overflow");
error++;
}
/*
* check whether we're receiving data for an inactive B-channel
* and discard it. This appears to happen for telephony when
* both B-channels are active and one is deactivated. Since
* it is not really possible to deactivate the channel in that
* case (the ASIC seems to deactivate _both_ channels), the
* "deactivated" channel keeps receiving data which can lead
* to exhaustion of mbufs and a kernel panic.
*
* This is a hack, but it's the only solution I can think of
* without having the documentation for the ASIC.
* GJ - 28 Nov 1999
*/
if (chan->state == HSCX_IDLE)
{
NDBGL1(L1_H_XFRERR, "toss data from %d", h_chan);
error++;
}
fifo_data_len = ((stat & HSCX_STAT_RML_MASK) >> 8);
if(fifo_data_len == 0)
fifo_data_len = sc->sc_bfifolen;
/* ALWAYS read data from HSCX fifo */
HSCX_RDFIFO(h_chan, scrbuf, fifo_data_len);
chan->rxcount += fifo_data_len;
/* all error conditions checked, now decide and take action */
if(error == 0)
{
if(chan->in_mbuf == NULL)
{
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 avma1pp2_hscx_intr: RME, cannot allocate mbuf!\n");
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
if((chan->in_len + fifo_data_len) <= BCH_MAX_DATALEN)
{
/* OK to copy the data */
bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
chan->in_cbptr += fifo_data_len;
chan->in_len += fifo_data_len;
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0IFPI2UNIT(sc->sc_unit);
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
if (stat & HSCX_STAT_RME)
{
if((stat & HSCX_STAT_CRCVFRRAB) == HSCX_STAT_CRCVFR)
{
(*chan->isic_drvr_linktab->bch_rx_data_ready)(chan->isic_drvr_linktab->unit);
activity = ACT_RX;
/* mark buffer ptr as unused */
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
else
{
chan->stat_CRC++;
NDBGL1(L1_H_XFRERR, "CRC/RAB");
if (chan->in_mbuf != NULL)
{
i4b_Bfreembuf(chan->in_mbuf);
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
}
}
} /* END enough space in mbuf */
else
{
if(chan->bprot == BPROT_NONE)
{
/* setup mbuf data length */
chan->in_mbuf->m_len = chan->in_len;
chan->in_mbuf->m_pkthdr.len = chan->in_len;
if(sc->sc_trace & TRACE_B_RX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0IFPI2UNIT(sc->sc_unit);
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_NT;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, chan->in_mbuf->m_len, chan->in_mbuf->m_data);
}
if(!(i4b_l1_bchan_tel_silence(chan->in_mbuf->m_data, chan->in_mbuf->m_len)))
activity = ACT_RX;
/* move rx'd data to rx queue */
#if defined (__FreeBSD__) && __FreeBSD__ > 4
(void) IF_HANDOFF(&chan->rx_queue, chan->in_mbuf, NULL);
#else
if(!(IF_QFULL(&chan->rx_queue)))
{
IF_ENQUEUE(&chan->rx_queue, chan->in_mbuf);
}
else
{
i4b_Bfreembuf(chan->in_mbuf);
}
#endif
/* signal upper layer that data are available */
(*chan->isic_drvr_linktab->bch_rx_data_ready)(chan->isic_drvr_linktab->unit);
/* alloc new buffer */
if((chan->in_mbuf = i4b_Bgetmbuf(BCH_MAX_DATALEN)) == NULL)
panic("L1 avma1pp2_hscx_intr: RPF, cannot allocate new mbuf!\n");
/* setup new data ptr */
chan->in_cbptr = chan->in_mbuf->m_data;
/* OK to copy the data */
bcopy(scrbuf, chan->in_cbptr, fifo_data_len);
chan->in_cbptr += fifo_data_len;
chan->in_len = fifo_data_len;
chan->rxcount += fifo_data_len;
}
else
{
NDBGL1(L1_H_XFRERR, "RAWHDLC rx buffer overflow in RPF, in_len=%d", chan->in_len);
chan->in_cbptr = chan->in_mbuf->m_data;
chan->in_len = 0;
}
}
} /* if(error == 0) */
else
{
/* land here for RDO */
if (chan->in_mbuf != NULL)
{
i4b_Bfreembuf(chan->in_mbuf);
chan->in_mbuf = NULL;
chan->in_cbptr = NULL;
chan->in_len = 0;
}
sc->avma1pp_txl = 0;
sc->avma1pp_cmd |= HSCX_CMD_RRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd &= ~HSCX_CMD_RRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
}
}
/* transmit fifo empty, new data can be written to fifo */
if(stat & HSCX_INT_XPR)
{
/*
* for a description what is going on here, please have
* a look at isic_bchannel_start() in i4b_bchan.c !
*/
NDBGL1(L1_H_IRQ, "unit %d, chan %d - XPR, Tx Fifo Empty!", sc->sc_unit, h_chan);
if(chan->out_mbuf_cur == NULL) /* last frame is transmitted */
{
IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
if(chan->out_mbuf_head == NULL)
{
chan->state &= ~HSCX_TX_ACTIVE;
(*chan->isic_drvr_linktab->bch_tx_queue_empty)(chan->isic_drvr_linktab->unit);
}
else
{
chan->state |= HSCX_TX_ACTIVE;
chan->out_mbuf_cur = chan->out_mbuf_head;
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
if(sc->sc_trace & TRACE_B_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0IFPI2UNIT(sc->sc_unit);
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
if(chan->bprot == BPROT_NONE)
{
if(!(i4b_l1_bchan_tel_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
activity = ACT_TX;
}
else
{
activity = ACT_TX;
}
}
}
avma1pp2_hscx_fifo(chan, sc);
}
/* call timeout handling routine */
if(activity == ACT_RX || activity == ACT_TX)
(*chan->isic_drvr_linktab->bch_activity)(chan->isic_drvr_linktab->unit, activity);
}
/*
* this is the main routine which checks each channel and then calls
* the real interrupt routine as appropriate
*/
static void
avma1pp2_hscx_int_handler(struct l1_softc *sc)
{
u_int stat;
/* has to be a u_int because the byte count is in the 2nd byte */
stat = hscx_read_reg_int(0, sc);
if (stat & HSCX_INT_MASK)
avma1pp2_hscx_intr(0, stat, sc);
stat = hscx_read_reg_int(1, sc);
if (stat & HSCX_INT_MASK)
avma1pp2_hscx_intr(1, stat, sc);
}
static void
avma1pp2_disable(device_t dev)
{
struct l1_softc *sc = device_get_softc(dev);
bus_space_handle_t bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
bus_space_tag_t btag = rman_get_bustag(sc->sc_resources.io_base[0]);
/* could be still be wrong, but seems to prevent hangs */
bus_space_write_1(btag, bhandle, STAT0_OFFSET, 0x00);
}
static void
avma1pp2_intr(void *xsc)
{
u_char stat;
struct l1_softc *sc;
bus_space_handle_t bhandle;
bus_space_tag_t btag;
sc = xsc;
bhandle = rman_get_bushandle(sc->sc_resources.io_base[0]);
btag = rman_get_bustag(sc->sc_resources.io_base[0]);
stat = bus_space_read_1(btag, bhandle, STAT0_OFFSET);
NDBGL1(L1_H_IRQ, "stat %x", stat);
/* was there an interrupt from this card ? */
if ((stat & ASL_IRQ_Pending) == 0)
return; /* no */
/* For slow machines loop as long as an interrupt is active */
for (; ((stat & ASL_IRQ_Pending) != 0) ;)
{
/* interrupts are high active */
if (stat & ASL_IRQ_TIMER)
NDBGL1(L1_H_IRQ, "timer interrupt ???");
if (stat & ASL_IRQ_HSCX)
{
NDBGL1(L1_H_IRQ, "HSCX");
avma1pp2_hscx_int_handler(sc);
}
if (stat & ASL_IRQ_ISAC)
{
NDBGL1(L1_H_IRQ, "ISAC");
ifpi2_isacsx_intr(sc);
}
stat = bus_space_read_1(btag, bhandle, STAT0_OFFSET);
NDBGL1(L1_H_IRQ, "stat %x", stat);
}
}
static void
avma1pp2_hscx_init(struct l1_softc *sc, int h_chan, int activate)
{
l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
u_int param = 0;
NDBGL1(L1_BCHAN, "unit=%d, channel=%d, %s",
sc->sc_unit, h_chan, activate ? "activate" : "deactivate");
sc->avma1pp_cmd = sc->avma1pp_prot = sc->avma1pp_txl = 0;
if (activate == 0)
{
/* only deactivate if both channels are idle */
if (sc->sc_chan[HSCX_CH_A].state != HSCX_IDLE ||
sc->sc_chan[HSCX_CH_B].state != HSCX_IDLE)
{
return;
}
sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
sc->avma1pp_prot = HSCX_MODE_TRANS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
return;
}
if(chan->bprot == BPROT_RHDLC)
{
NDBGL1(L1_BCHAN, "BPROT_RHDLC");
/* HDLC Frames, transparent mode 0 */
sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
sc->avma1pp_prot = HSCX_MODE_ITF_FLG;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd = HSCX_CMD_XRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd = 0;
}
else
{
NDBGL1(L1_BCHAN, "BPROT_NONE??");
/* Raw Telephony, extended transparent mode 1 */
sc->avma1pp_cmd = HSCX_CMD_XRS|HSCX_CMD_RRS;
sc->avma1pp_prot = HSCX_MODE_TRANS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd = HSCX_CMD_XRS;
AVMA1PPSETCMDLONG(param);
hscx_write_reg(h_chan, param, sc);
sc->avma1pp_cmd = 0;
}
}
static void
avma1pp2_bchannel_setup(int unit, int h_chan, int bprot, int activate)
{
#ifdef __FreeBSD__
struct l1_softc *sc = ifpi2_scp[unit];
#else
struct l1_softc *sc = isic_find_sc(unit);
#endif
l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
int s = SPLI4B();
if(activate == 0)
{
/* deactivation */
chan->state = HSCX_IDLE;
avma1pp2_hscx_init(sc, h_chan, activate);
}
NDBGL1(L1_BCHAN, "unit=%d, channel=%d, %s",
sc->sc_unit, h_chan, activate ? "activate" : "deactivate");
/* general part */
chan->unit = sc->sc_unit; /* unit number */
chan->channel = h_chan; /* B channel */
chan->bprot = bprot; /* B channel protocol */
chan->state = HSCX_IDLE; /* B channel state */
/* receiver part */
chan->rx_queue.ifq_maxlen = IFQ_MAXLEN;
i4b_Bcleanifq(&chan->rx_queue); /* clean rx queue */
chan->rxcount = 0; /* reset rx counter */
i4b_Bfreembuf(chan->in_mbuf); /* clean rx mbuf */
chan->in_mbuf = NULL; /* reset mbuf ptr */
chan->in_cbptr = NULL; /* reset mbuf curr ptr */
chan->in_len = 0; /* reset mbuf data len */
/* transmitter part */
chan->tx_queue.ifq_maxlen = IFQ_MAXLEN;
i4b_Bcleanifq(&chan->tx_queue); /* clean tx queue */
chan->txcount = 0; /* reset tx counter */
i4b_Bfreembuf(chan->out_mbuf_head); /* clean tx mbuf */
chan->out_mbuf_head = NULL; /* reset head mbuf ptr */
chan->out_mbuf_cur = NULL; /* reset current mbuf ptr */
chan->out_mbuf_cur_ptr = NULL; /* reset current mbuf data ptr */
chan->out_mbuf_cur_len = 0; /* reset current mbuf data cnt */
if(activate != 0)
{
/* activation */
avma1pp2_hscx_init(sc, h_chan, activate);
chan->state |= HSCX_AVMA1PP_ACTIVE;
}
splx(s);
}
static void
avma1pp2_bchannel_start(int unit, int h_chan)
{
#ifdef __FreeBSD__
struct l1_softc *sc = ifpi2_scp[unit];
#else
struct l1_softc *sc = isic_find_sc(unit);
#endif
register l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
int s;
int activity = -1;
s = SPLI4B(); /* enter critical section */
if(chan->state & HSCX_TX_ACTIVE) /* already running ? */
{
splx(s);
return; /* yes, leave */
}
/* get next mbuf from queue */
IF_DEQUEUE(&chan->tx_queue, chan->out_mbuf_head);
if(chan->out_mbuf_head == NULL) /* queue empty ? */
{
splx(s); /* leave critical section */
return; /* yes, exit */
}
/* init current mbuf values */
chan->out_mbuf_cur = chan->out_mbuf_head;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
/* activity indicator for timeout handling */
if(chan->bprot == BPROT_NONE)
{
if(!(i4b_l1_bchan_tel_silence(chan->out_mbuf_cur->m_data, chan->out_mbuf_cur->m_len)))
activity = ACT_TX;
}
else
{
activity = ACT_TX;
}
chan->state |= HSCX_TX_ACTIVE; /* we start transmitting */
if(sc->sc_trace & TRACE_B_TX) /* if trace, send mbuf to trace dev */
{
i4b_trace_hdr_t hdr;
hdr.unit = L0IFPI2UNIT(sc->sc_unit);
hdr.type = (h_chan == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
avma1pp2_hscx_fifo(chan, sc);
/* call timeout handling routine */
if(activity == ACT_RX || activity == ACT_TX)
(*chan->isic_drvr_linktab->bch_activity)(chan->isic_drvr_linktab->unit, activity);
splx(s);
}
/*---------------------------------------------------------------------------*
* return the address of isic drivers linktab
*---------------------------------------------------------------------------*/
static isdn_link_t *
avma1pp2_ret_linktab(int unit, int channel)
{
#ifdef __FreeBSD__
struct l1_softc *sc = ifpi2_scp[unit];
#else
struct l1_softc *sc = isic_find_sc(unit);
#endif
l1_bchan_state_t *chan = &sc->sc_chan[channel];
return(&chan->isic_isdn_linktab);
}
/*---------------------------------------------------------------------------*
* set the driver linktab in the b channel softc
*---------------------------------------------------------------------------*/
static void
avma1pp2_set_linktab(int unit, int channel, drvr_link_t *dlt)
{
#ifdef __FreeBSD__
struct l1_softc *sc = ifpi2_scp[unit];
#else
struct l1_softc *sc = isic_find_sc(unit);
#endif
l1_bchan_state_t *chan = &sc->sc_chan[channel];
chan->isic_drvr_linktab = dlt;
}
/*---------------------------------------------------------------------------*
* initialize our local linktab
*---------------------------------------------------------------------------*/
static void
avma1pp2_init_linktab(struct l1_softc *sc)
{
l1_bchan_state_t *chan = &sc->sc_chan[HSCX_CH_A];
isdn_link_t *lt = &chan->isic_isdn_linktab;
/* make sure the hardware driver is known to layer 4 */
/* avoid overwriting if already set */
if (ctrl_types[CTRL_PASSIVE].set_linktab == NULL)
{
ctrl_types[CTRL_PASSIVE].set_linktab = i4b_l1_set_linktab;
ctrl_types[CTRL_PASSIVE].get_linktab = i4b_l1_ret_linktab;
}
/* local setup */
lt->unit = sc->sc_unit;
lt->channel = HSCX_CH_A;
lt->bch_config = avma1pp2_bchannel_setup;
lt->bch_tx_start = avma1pp2_bchannel_start;
lt->bch_stat = avma1pp2_bchannel_stat;
lt->tx_queue = &chan->tx_queue;
/* used by non-HDLC data transfers, i.e. telephony drivers */
lt->rx_queue = &chan->rx_queue;
/* used by HDLC data transfers, i.e. ipr and isp drivers */
lt->rx_mbuf = &chan->in_mbuf;
chan = &sc->sc_chan[HSCX_CH_B];
lt = &chan->isic_isdn_linktab;
lt->unit = sc->sc_unit;
lt->channel = HSCX_CH_B;
lt->bch_config = avma1pp2_bchannel_setup;
lt->bch_tx_start = avma1pp2_bchannel_start;
lt->bch_stat = avma1pp2_bchannel_stat;
lt->tx_queue = &chan->tx_queue;
/* used by non-HDLC data transfers, i.e. telephony drivers */
lt->rx_queue = &chan->rx_queue;
/* used by HDLC data transfers, i.e. ipr and isp drivers */
lt->rx_mbuf = &chan->in_mbuf;
}
/*
* use this instead of isic_bchannel_stat in i4b_bchan.c because it's static
*/
static void
avma1pp2_bchannel_stat(int unit, int h_chan, bchan_statistics_t *bsp)
{
#ifdef __FreeBSD__
struct l1_softc *sc = ifpi2_scp[unit];
#else
struct l1_softc *sc = isic_find_sc(unit);
#endif
l1_bchan_state_t *chan = &sc->sc_chan[h_chan];
int s;
s = SPLI4B();
bsp->outbytes = chan->txcount;
bsp->inbytes = chan->rxcount;
chan->txcount = 0;
chan->rxcount = 0;
splx(s);
}
/*---------------------------------------------------------------------------*
* fill HSCX fifo with data from the current mbuf
* Put this here until it can go into i4b_hscx.c
*---------------------------------------------------------------------------*/
static int
avma1pp2_hscx_fifo(l1_bchan_state_t *chan, struct l1_softc *sc)
{
int len;
int nextlen;
int i;
int cmd = 0;
/* using a scratch buffer simplifies writing to the FIFO */
u_char scrbuf[HSCX_FIFO_LEN];
len = 0;
/*
* fill the HSCX tx fifo with data from the current mbuf. if
* current mbuf holds less data than HSCX fifo length, try to
* get the next mbuf from (a possible) mbuf chain. if there is
* not enough data in a single mbuf or in a chain, then this
* is the last mbuf and we tell the HSCX that it has to send
* CRC and closing flag
*/
while(chan->out_mbuf_cur && len != sc->sc_bfifolen)
{
nextlen = min(chan->out_mbuf_cur_len, sc->sc_bfifolen - len);
#ifdef NOTDEF
printf("i:mh=%p, mc=%p, mcp=%p, mcl=%d l=%d nl=%d # ",
chan->out_mbuf_head,
chan->out_mbuf_cur,
chan->out_mbuf_cur_ptr,
chan->out_mbuf_cur_len,
len,
nextlen);
#endif
cmd |= HSCX_CMDR_XTF;
/* collect the data in the scratch buffer */
for (i = 0; i < nextlen; i++)
scrbuf[i + len] = chan->out_mbuf_cur_ptr[i];
len += nextlen;
chan->txcount += nextlen;
chan->out_mbuf_cur_ptr += nextlen;
chan->out_mbuf_cur_len -= nextlen;
if(chan->out_mbuf_cur_len == 0)
{
if((chan->out_mbuf_cur = chan->out_mbuf_cur->m_next) != NULL)
{
chan->out_mbuf_cur_ptr = chan->out_mbuf_cur->m_data;
chan->out_mbuf_cur_len = chan->out_mbuf_cur->m_len;
if(sc->sc_trace & TRACE_B_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0IFPI2UNIT(sc->sc_unit);
hdr.type = (chan->channel == HSCX_CH_A ? TRC_CH_B1 : TRC_CH_B2);
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_bcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, chan->out_mbuf_cur->m_len, chan->out_mbuf_cur->m_data);
}
}
else
{
if (chan->bprot != BPROT_NONE)
cmd |= HSCX_CMDR_XME;
i4b_Bfreembuf(chan->out_mbuf_head);
chan->out_mbuf_head = NULL;
}
}
}
/* write what we have from the scratch buf to the HSCX fifo */
if (len != 0)
HSCX_WRFIFO(chan->channel, scrbuf, len);
return(cmd);
}
/*---------------------------------------------------------------------------*
* ifpi2 - ISAC interrupt routine
*---------------------------------------------------------------------------*/
static void
ifpi2_isacsx_intr(struct l1_softc *sc)
{
register u_char isacsx_irq_stat;
for(;;)
{
/* get isac irq status */
/* ISTA tells us whether it was a C/I or HDLC int. */
isacsx_irq_stat = ISAC_READ(I_ISTA);
if(isacsx_irq_stat)
ifpi2_isacsx_irq(sc, isacsx_irq_stat); /* isac handler */
else
break;
}
ISAC_WRITE(I_MASKD, 0xff);
ISAC_WRITE(I_MASK, 0xff);
DELAY(100);
ISAC_WRITE(I_MASKD, isacsx_imaskd);
ISAC_WRITE(I_MASK, isacsx_imask);
}
/*---------------------------------------------------------------------------*
* ifpi2_recover - try to recover from irq lockup
*---------------------------------------------------------------------------*/
void
ifpi2_recover(struct l1_softc *sc)
{
printf("ifpi2_recover %d\n", sc->sc_unit);
#if 0 /* fix me later */
u_char byte;
/* get isac irq status */
byte = ISAC_READ(I_ISTA);
NDBGL1(L1_ERROR, " ISAC: ISTA = 0x%x", byte);
if(byte & ISACSX_ISTA_EXI)
NDBGL1(L1_ERROR, " ISAC: EXIR = 0x%x", (u_char)ISAC_READ(I_EXIR));
if(byte & ISACSX_ISTA_CISQ)
{
byte = ISAC_READ(I_CIRR);
NDBGL1(L1_ERROR, " ISAC: CISQ = 0x%x", byte);
if(byte & ISACSX_CIRR_SQC)
NDBGL1(L1_ERROR, " ISAC: SQRR = 0x%x", (u_char)ISAC_READ(I_SQRR));
}
NDBGL1(L1_ERROR, " ISAC: IMASK = 0x%x", ISACSX_IMASK);
ISAC_WRITE(I_MASKD, 0xff);
ISAC_WRITE(I_MASK, 0xff);
DELAY(100);
ISAC_WRITE(I_MASKD, isacsx_imaskd);
ISAC_WRITE(I_MASK, isacsx_imask);
#endif
}
#endif /* NIFPI2 > 0 */
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