NetBSD/sys/dev/sbus/if_le_ledma.c

420 lines
10 KiB
C

/* $NetBSD: if_le_ledma.c,v 1.35 2010/01/19 22:07:43 pooka Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
* Simulation Facility, NASA Ames Research Center; 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le_ledma.c,v 1.35 2010/01/19 22:07:43 pooka Exp $");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif
#include <sys/bus.h>
#include <sys/intr.h>
#include <machine/autoconf.h>
#include <dev/sbus/sbusvar.h>
#include <dev/ic/lsi64854reg.h>
#include <dev/ic/lsi64854var.h>
#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include "ioconf.h"
/*
* LANCE registers.
*/
#define LEREG1_RDP 0 /* Register Data port */
#define LEREG1_RAP 2 /* Register Address port */
struct le_softc {
struct am7990_softc sc_am7990; /* glue to MI code */
bus_space_tag_t sc_bustag;
bus_dmamap_t sc_dmamap;
bus_space_handle_t sc_reg; /* LANCE registers */
struct lsi64854_softc *sc_dma; /* pointer to my dma */
u_int sc_laddr; /* LANCE DMA address */
u_int sc_lostcount;
#define LE_LOSTTHRESH 5 /* lost carrior count to switch media */
};
#define MEMSIZE (16*1024) /* LANCE memory size */
#define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
int lematch_ledma(device_t, cfdata_t, void *);
void leattach_ledma(device_t, device_t, void *);
/*
* Media types supported by the Sun4m.
*/
static int lemedia[] = {
IFM_ETHER|IFM_10_T,
IFM_ETHER|IFM_10_5,
IFM_ETHER|IFM_AUTO,
};
#define NLEMEDIA __arraycount(lemedia)
void lesetutp(struct lance_softc *);
void lesetaui(struct lance_softc *);
int lemediachange(struct lance_softc *);
void lemediastatus(struct lance_softc *, struct ifmediareq *);
CFATTACH_DECL_NEW(le_ledma, sizeof(struct le_softc),
lematch_ledma, leattach_ledma, NULL, NULL);
#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif
static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t lerdcsr(struct lance_softc *, uint16_t);
static void lehwreset(struct lance_softc *);
static void lehwinit(struct lance_softc *);
static void lenocarrier(struct lance_softc *);
static void
lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
struct le_softc *lesc = (struct le_softc *)sc;
bus_space_tag_t t = lesc->sc_bustag;
bus_space_handle_t h = lesc->sc_reg;
bus_space_write_2(t, h, LEREG1_RAP, port);
bus_space_write_2(t, h, LEREG1_RDP, val);
#if defined(SUN4M)
/*
* We need to flush the Sbus->Mbus write buffers. This can most
* easily be accomplished by reading back the register that we
* just wrote (thanks to Chris Torek for this solution).
*/
(void)bus_space_read_2(t, h, LEREG1_RDP);
#endif
}
static uint16_t
lerdcsr(struct lance_softc *sc, uint16_t port)
{
struct le_softc *lesc = (struct le_softc *)sc;
bus_space_tag_t t = lesc->sc_bustag;
bus_space_handle_t h = lesc->sc_reg;
bus_space_write_2(t, h, LEREG1_RAP, port);
return (bus_space_read_2(t, h, LEREG1_RDP));
}
void
lesetutp(struct lance_softc *sc)
{
struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
uint32_t csr;
csr = L64854_GCSR(dma);
csr |= E_TP_AUI;
L64854_SCSR(dma, csr);
delay(20000); /* must not touch le for 20ms */
}
void
lesetaui(struct lance_softc *sc)
{
struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
uint32_t csr;
csr = L64854_GCSR(dma);
csr &= ~E_TP_AUI;
L64854_SCSR(dma, csr);
delay(20000); /* must not touch le for 20ms */
}
int
lemediachange(struct lance_softc *sc)
{
struct ifmedia *ifm = &sc->sc_media;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
/*
* Switch to the selected media. If autoselect is
* set, we don't really have to do anything. We'll
* switch to the other media when we detect loss of
* carrier.
*/
switch (IFM_SUBTYPE(ifm->ifm_media)) {
case IFM_10_T:
lesetutp(sc);
break;
case IFM_10_5:
lesetaui(sc);
break;
case IFM_AUTO:
break;
default:
return (EINVAL);
}
return (0);
}
void
lemediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
{
struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
/*
* Notify the world which media we're currently using.
*/
if (L64854_GCSR(dma) & E_TP_AUI)
ifmr->ifm_active = IFM_ETHER|IFM_10_T;
else
ifmr->ifm_active = IFM_ETHER|IFM_10_5;
}
static void
lehwreset(struct lance_softc *sc)
{
struct le_softc *lesc = (struct le_softc *)sc;
struct lsi64854_softc *dma = lesc->sc_dma;
uint32_t csr;
u_int aui_bit;
/*
* Reset DMA channel.
*/
csr = L64854_GCSR(dma);
aui_bit = csr & E_TP_AUI;
DMA_RESET(dma);
/* Write bits 24-31 of Lance address */
bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR,
lesc->sc_laddr & 0xff000000);
DMA_ENINTR(dma);
/*
* Disable E-cache invalidates on chip writes.
* Retain previous cable selection bit.
*/
csr = L64854_GCSR(dma);
csr |= (E_DSBL_WR_INVAL | aui_bit);
L64854_SCSR(dma, csr);
delay(20000); /* must not touch le for 20ms */
}
static void
lehwinit(struct lance_softc *sc)
{
/*
* Make sure we're using the currently-enabled media type.
* XXX Actually, this is probably unnecessary, now.
*/
switch (IFM_SUBTYPE(sc->sc_media.ifm_cur->ifm_media)) {
case IFM_10_T:
lesetutp(sc);
break;
case IFM_10_5:
lesetaui(sc);
break;
}
}
static void
lenocarrier(struct lance_softc *sc)
{
struct le_softc *lesc = (struct le_softc *)sc;
/* it may take a while for modern switches to set 10baseT media */
if (lesc->sc_lostcount++ < LE_LOSTTHRESH)
return;
lesc->sc_lostcount = 0;
/*
* Check if the user has requested a certain cable type, and
* if so, honor that request.
*/
printf("%s: lost carrier on ", device_xname(sc->sc_dev));
if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
printf("UTP port");
switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
case IFM_10_5:
case IFM_AUTO:
printf(", switching to AUI port");
lesetaui(sc);
}
} else {
printf("AUI port");
switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
case IFM_10_T:
case IFM_AUTO:
printf(", switching to UTP port");
lesetutp(sc);
}
}
printf("\n");
}
int
lematch_ledma(device_t parent, cfdata_t cf, void *aux)
{
struct sbus_attach_args *sa = aux;
return (strcmp(cf->cf_name, sa->sa_name) == 0);
}
void
leattach_ledma(device_t parent, device_t self, void *aux)
{
struct le_softc *lesc = device_private(self);
struct lance_softc *sc = &lesc->sc_am7990.lsc;
struct lsi64854_softc *lsi = device_private(parent);
struct sbus_attach_args *sa = aux;
bus_dma_tag_t dmatag = sa->sa_dmatag;
bus_dma_segment_t seg;
int rseg, error;
sc->sc_dev = self;
lesc->sc_bustag = sa->sa_bustag;
/* Establish link to `ledma' device */
lesc->sc_dma = lsi;
lesc->sc_dma->sc_client = lesc;
/* Map device registers */
if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_offset,
sa->sa_size,
0, &lesc->sc_reg) != 0) {
aprint_error(": cannot map registers\n");
return;
}
/* Allocate buffer memory */
sc->sc_memsize = MEMSIZE;
/* Get a DMA handle */
if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE,
LEDMA_BOUNDARY, BUS_DMA_NOWAIT,
&lesc->sc_dmamap)) != 0) {
aprint_error(": DMA map create error %d\n", error);
return;
}
/* Allocate DMA buffer */
if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY,
&seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
aprint_error(": DMA buffer alloc error %d\n",error);
return;
}
/* Map DMA buffer into kernel space */
if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
(void **)&sc->sc_mem,
BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
aprint_error(": DMA buffer map error %d\n", error);
bus_dmamem_free(dmatag, &seg, rseg);
return;
}
/* Load DMA buffer */
if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
MEMSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
aprint_error(": DMA buffer map load error %d\n", error);
bus_dmamem_free(dmatag, &seg, rseg);
bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
return;
}
lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr;
sc->sc_addr = lesc->sc_laddr & 0xffffff;
sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
lesc->sc_lostcount = 0;
sc->sc_mediachange = lemediachange;
sc->sc_mediastatus = lemediastatus;
sc->sc_supmedia = lemedia;
sc->sc_nsupmedia = NLEMEDIA;
sc->sc_defaultmedia = IFM_ETHER|IFM_AUTO;
prom_getether(sa->sa_node, sc->sc_enaddr);
sc->sc_copytodesc = lance_copytobuf_contig;
sc->sc_copyfromdesc = lance_copyfrombuf_contig;
sc->sc_copytobuf = lance_copytobuf_contig;
sc->sc_copyfrombuf = lance_copyfrombuf_contig;
sc->sc_zerobuf = lance_zerobuf_contig;
sc->sc_rdcsr = lerdcsr;
sc->sc_wrcsr = lewrcsr;
sc->sc_hwinit = lehwinit;
sc->sc_nocarrier = lenocarrier;
sc->sc_hwreset = lehwreset;
/* Establish interrupt handler */
if (sa->sa_nintr != 0)
(void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
am7990_intr, sc);
am7990_config(&lesc->sc_am7990);
/* now initialize DMA */
lehwreset(sc);
}