NetBSD/sys/dev/sbus/qec.c

412 lines
10 KiB
C

/* $NetBSD: qec.c,v 1.12 2000/12/04 20:12:55 fvdl Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/autoconf.h>
#include <dev/sbus/sbusvar.h>
#include <dev/sbus/qecreg.h>
#include <dev/sbus/qecvar.h>
static int qecprint __P((void *, const char *));
static int qecmatch __P((struct device *, struct cfdata *, void *));
static void qecattach __P((struct device *, struct device *, void *));
void qec_init __P((struct qec_softc *));
static int qec_bus_map __P((
bus_space_tag_t,
bus_type_t, /*slot*/
bus_addr_t, /*offset*/
bus_size_t, /*size*/
int, /*flags*/
vaddr_t, /*preferred virtual address */
bus_space_handle_t *));
static void *qec_intr_establish __P((
bus_space_tag_t,
int, /*bus interrupt priority*/
int, /*`device class' interrupt level*/
int, /*flags*/
int (*) __P((void *)), /*handler*/
void *)); /*arg*/
struct cfattach qec_ca = {
sizeof(struct qec_softc), qecmatch, qecattach
};
int
qecprint(aux, busname)
void *aux;
const char *busname;
{
struct sbus_attach_args *sa = aux;
bus_space_tag_t t = sa->sa_bustag;
struct qec_softc *sc = t->cookie;
sa->sa_bustag = sc->sc_bustag; /* XXX */
sbus_print(aux, busname); /* XXX */
sa->sa_bustag = t; /* XXX */
return (UNCONF);
}
int
qecmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct sbus_attach_args *sa = aux;
return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
}
/*
* Attach all the sub-devices we can find
*/
void
qecattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct sbus_attach_args *sa = aux;
struct qec_softc *sc = (void *)self;
int node;
int sbusburst;
bus_space_tag_t sbt;
bus_space_handle_t bh;
int error;
sc->sc_bustag = sa->sa_bustag;
sc->sc_dmatag = sa->sa_dmatag;
node = sa->sa_node;
if (sa->sa_nreg < 2) {
printf("%s: only %d register sets\n",
self->dv_xname, sa->sa_nreg);
return;
}
if (sbus_bus_map(sa->sa_bustag,
sa->sa_reg[0].sbr_slot,
sa->sa_reg[0].sbr_offset,
sa->sa_reg[0].sbr_size,
BUS_SPACE_MAP_LINEAR, 0, &sc->sc_regs) != 0) {
printf("%s: attach: cannot map registers\n", self->dv_xname);
return;
}
/*
* This device's "register space 1" is just a buffer where the
* Lance ring-buffers can be stored. Note the buffer's location
* and size, so the child driver can pick them up.
*/
if (sbus_bus_map(sa->sa_bustag,
sa->sa_reg[1].sbr_slot,
sa->sa_reg[1].sbr_offset,
sa->sa_reg[1].sbr_size,
BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
printf("%s: attach: cannot map registers\n", self->dv_xname);
return;
}
sc->sc_buffer = (caddr_t)(u_long)bh;
sc->sc_bufsiz = (bus_size_t)sa->sa_reg[1].sbr_size;
/* Get number of on-board channels */
sc->sc_nchannels = getpropint(node, "#channels", -1);
if (sc->sc_nchannels == -1) {
printf(": no channels\n");
return;
}
/*
* Get transfer burst size from PROM
*/
sbusburst = ((struct sbus_softc *)parent)->sc_burst;
if (sbusburst == 0)
sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
sc->sc_burst = getpropint(node, "burst-sizes", -1);
if (sc->sc_burst == -1)
/* take SBus burst sizes */
sc->sc_burst = sbusburst;
/* Clamp at parent's burst sizes */
sc->sc_burst &= sbusburst;
sbus_establish(&sc->sc_sd, &sc->sc_dev);
/*
* Collect address translations from the OBP.
*/
error = getprop(node, "ranges", sizeof(struct sbus_range),
&sc->sc_nrange, (void **)&sc->sc_range);
switch (error) {
case 0:
break;
case ENOENT:
default:
panic("%s: error getting ranges property", self->dv_xname);
}
/* Allocate a bus tag */
sbt = (bus_space_tag_t)
malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
if (sbt == NULL) {
printf("%s: attach: out of memory\n", self->dv_xname);
return;
}
bzero(sbt, sizeof *sbt);
sbt->cookie = sc;
sbt->parent = sc->sc_bustag;
sbt->sparc_bus_map = qec_bus_map;
sbt->sparc_intr_establish = qec_intr_establish;
/*
* Save interrupt information for use in our qec_intr_establish()
* function below. Apparently, the intr level for the quad
* ethernet board (qe) is stored in the QEC node rather then
* separately in each of the QE nodes.
*
* XXX - qe.c should call bus_intr_establish() with `level = 0'..
* XXX - maybe we should have our own attach args for all that.
*/
sc->sc_intr = sa->sa_intr;
printf(": %dK memory\n", sc->sc_bufsiz / 1024);
qec_init(sc);
/* search through children */
for (node = firstchild(node); node; node = nextsibling(node)) {
struct sbus_attach_args sa;
sbus_setup_attach_args((struct sbus_softc *)parent,
sbt, sc->sc_dmatag, node, &sa);
(void)config_found(&sc->sc_dev, (void *)&sa, qecprint);
sbus_destroy_attach_args(&sa);
}
}
int
qec_bus_map(t, btype, offset, size, flags, vaddr, hp)
bus_space_tag_t t;
bus_type_t btype;
bus_addr_t offset;
bus_size_t size;
int flags;
vaddr_t vaddr;
bus_space_handle_t *hp;
{
struct qec_softc *sc = t->cookie;
int slot = btype;
int i;
for (i = 0; i < sc->sc_nrange; i++) {
bus_addr_t paddr;
bus_type_t iospace;
if (sc->sc_range[i].cspace != slot)
continue;
/* We've found the connection to the parent bus */
paddr = sc->sc_range[i].poffset + offset;
iospace = sc->sc_range[i].pspace;
return (bus_space_map2(sc->sc_bustag, iospace, paddr,
size, flags, vaddr, hp));
}
return (EINVAL);
}
void *
qec_intr_establish(t, pri, level, flags, handler, arg)
bus_space_tag_t t;
int pri;
int level;
int flags;
int (*handler) __P((void *));
void *arg;
{
struct qec_softc *sc = t->cookie;
if (pri == 0) {
/*
* qe.c calls bus_intr_establish() with `pri == 0'
* XXX - see also comment in qec_attach().
*/
if (sc->sc_intr == NULL) {
printf("%s: warning: no interrupts\n",
sc->sc_dev.dv_xname);
return (NULL);
}
pri = sc->sc_intr->sbi_pri;
}
return (bus_intr_establish(t->parent, pri, level, flags, handler, arg));
}
void
qec_init(sc)
struct qec_softc *sc;
{
bus_space_tag_t t = sc->sc_bustag;
bus_space_handle_t qr = sc->sc_regs;
u_int32_t v, burst = 0, psize;
int i;
/* First, reset the controller */
bus_space_write_4(t, qr, QEC_QRI_CTRL, QEC_CTRL_RESET);
for (i = 0; i < 1000; i++) {
DELAY(100);
v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
if ((v & QEC_CTRL_RESET) == 0)
break;
}
/*
* Cut available buffer size into receive and transmit buffers.
* XXX - should probably be done in be & qe driver...
*/
v = sc->sc_msize = sc->sc_bufsiz / sc->sc_nchannels;
bus_space_write_4(t, qr, QEC_QRI_MSIZE, v);
v = sc->sc_rsize = sc->sc_bufsiz / (sc->sc_nchannels * 2);
bus_space_write_4(t, qr, QEC_QRI_RSIZE, v);
bus_space_write_4(t, qr, QEC_QRI_TSIZE, v);
psize = sc->sc_nchannels == 1 ? QEC_PSIZE_2048 : 0;
bus_space_write_4(t, qr, QEC_QRI_PSIZE, psize);
if (sc->sc_burst & SBUS_BURST_64)
burst = QEC_CTRL_B64;
else if (sc->sc_burst & SBUS_BURST_32)
burst = QEC_CTRL_B32;
else
burst = QEC_CTRL_B16;
v = bus_space_read_4(t, qr, QEC_QRI_CTRL);
v = (v & QEC_CTRL_MODEMASK) | burst;
bus_space_write_4(t, qr, QEC_QRI_CTRL, v);
}
/*
* Common routine to initialize the QEC packet ring buffer.
* Called from be & qe drivers.
*/
void
qec_meminit(qr, pktbufsz)
struct qec_ring *qr;
unsigned int pktbufsz;
{
bus_addr_t txbufdma, rxbufdma;
bus_addr_t dma;
caddr_t p;
unsigned int ntbuf, nrbuf, i;
p = qr->rb_membase;
dma = qr->rb_dmabase;
ntbuf = qr->rb_ntbuf;
nrbuf = qr->rb_nrbuf;
/*
* Allocate transmit descriptors
*/
qr->rb_txd = (struct qec_xd *)p;
qr->rb_txddma = dma;
p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
/*
* Allocate receive descriptors
*/
qr->rb_rxd = (struct qec_xd *)p;
qr->rb_rxddma = dma;
p += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
dma += QEC_XD_RING_MAXSIZE * sizeof(struct qec_xd);
/*
* Allocate transmit buffers
*/
qr->rb_txbuf = p;
txbufdma = dma;
p += ntbuf * pktbufsz;
dma += ntbuf * pktbufsz;
/*
* Allocate receive buffers
*/
qr->rb_rxbuf = p;
rxbufdma = dma;
p += nrbuf * pktbufsz;
dma += nrbuf * pktbufsz;
/*
* Initialize transmit buffer descriptors
*/
for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
qr->rb_txd[i].xd_addr = (u_int32_t)
(txbufdma + (i % ntbuf) * pktbufsz);
qr->rb_txd[i].xd_flags = 0;
}
/*
* Initialize receive buffer descriptors
*/
for (i = 0; i < QEC_XD_RING_MAXSIZE; i++) {
qr->rb_rxd[i].xd_addr = (u_int32_t)
(rxbufdma + (i % nrbuf) * pktbufsz);
qr->rb_rxd[i].xd_flags = (i < nrbuf)
? QEC_XD_OWN | (pktbufsz & QEC_XD_LENGTH)
: 0;
}
qr->rb_tdhead = qr->rb_tdtail = 0;
qr->rb_td_nbusy = 0;
qr->rb_rdtail = 0;
}