NetBSD/sys/arch/sparc/dev/if_ie_obio.c

413 lines
12 KiB
C

/* $NetBSD: if_ie_obio.c,v 1.13 2000/01/11 12:59:46 pk Exp $ */
/*-
* Copyright (c) 1997 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.
*/
/*-
* Copyright (c) 1995 Charles D. Cranor
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/*
* Sparc OBIO front-end for the Intel 82586 Ethernet driver
*
* Converted to SUN ie driver by Charles D. Cranor,
* October 1994, January 1995.
*/
/*
* The i82586 is a very painful chip, found in sun3's, sun-4/100's
* sun-4/200's, and VME based suns. The byte order is all wrong for a
* SUN, making life difficult. Programming this chip is mostly the same,
* but certain details differ from system to system. This driver is
* written so that different "ie" interfaces can be controled by the same
* driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/pmap.h>
#include <machine/bus.h>
#include <dev/ic/i82586reg.h>
#include <dev/ic/i82586var.h>
/*
* the on-board interface
*/
struct ieob {
u_char obctrl;
};
#define IEOB_NORSET 0x80 /* don't reset the board */
#define IEOB_ONAIR 0x40 /* put us on the air */
#define IEOB_ATTEN 0x20 /* attention! */
#define IEOB_IENAB 0x10 /* interrupt enable */
#define IEOB_XXXXX 0x08 /* free bit */
#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */
#define IEOB_BUSERR 0x02 /* bus error */
#define IEOB_INT 0x01 /* interrupt */
#define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */
static void ie_obreset __P((struct ie_softc *, int));
static void ie_obattend __P((struct ie_softc *));
static void ie_obrun __P((struct ie_softc *));
int ie_obio_match __P((struct device *, struct cfdata *, void *));
void ie_obio_attach __P((struct device *, struct device *, void *));
struct cfattach ie_obio_ca = {
sizeof(struct ie_softc), ie_obio_match, ie_obio_attach
};
/* Supported media */
static int media[] = {
IFM_ETHER | IFM_10_2,
};
#define NMEDIA (sizeof(media) / sizeof(media[0]))
/*
* OBIO ie support routines
*/
void
ie_obreset(sc, what)
struct ie_softc *sc;
{
volatile struct ieob *ieo = (struct ieob *) sc->sc_reg;
ieo->obctrl = 0;
delay(100); /* XXX could be shorter? */
ieo->obctrl = IEOB_NORSET;
}
void
ie_obattend(sc)
struct ie_softc *sc;
{
volatile struct ieob *ieo = (struct ieob *) sc->sc_reg;
ieo->obctrl |= IEOB_ATTEN; /* flag! */
ieo->obctrl &= ~IEOB_ATTEN; /* down. */
}
void
ie_obrun(sc)
struct ie_softc *sc;
{
volatile struct ieob *ieo = (struct ieob *) sc->sc_reg;
ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET);
}
void ie_obio_memcopyin __P((struct ie_softc *, void *, int, size_t));
void ie_obio_memcopyout __P((struct ie_softc *, const void *, int, size_t));
/*
* Copy board memory to kernel.
*/
void
ie_obio_memcopyin(sc, p, offset, size)
struct ie_softc *sc;
void *p;
int offset;
size_t size;
{
void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/
wcopy(addr, p, size);
}
/*
* Copy from kernel space to naord memory.
*/
void
ie_obio_memcopyout(sc, p, offset, size)
struct ie_softc *sc;
const void *p;
int offset;
size_t size;
{
void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/
wcopy(p, addr, size);
}
/* read a 16-bit value at BH offset */
u_int16_t ie_obio_read16 __P((struct ie_softc *, int offset));
/* write a 16-bit value at BH offset */
void ie_obio_write16 __P((struct ie_softc *, int offset, u_int16_t value));
void ie_obio_write24 __P((struct ie_softc *, int offset, int addr));
u_int16_t
ie_obio_read16(sc, offset)
struct ie_softc *sc;
int offset;
{
u_int16_t v = bus_space_read_2(sc->bt, sc->bh, offset);
return (((v&0xff)<<8) | ((v>>8)&0xff));
}
void
ie_obio_write16(sc, offset, v)
struct ie_softc *sc;
int offset;
u_int16_t v;
{
v = (((v&0xff)<<8) | ((v>>8)&0xff));
bus_space_write_2(sc->bt, sc->bh, offset, v);
}
void
ie_obio_write24(sc, offset, addr)
struct ie_softc *sc;
int offset;
int addr;
{
u_char *f = (u_char *)&addr;
u_int16_t v0, v1;
u_char *t;
t = (u_char *)&v0;
t[0] = f[3]; t[1] = f[2];
bus_space_write_2(sc->bt, sc->bh, offset, v0);
t = (u_char *)&v1;
t[0] = f[1]; t[1] = 0;
bus_space_write_2(sc->bt, sc->bh, offset+2, v1);
}
int
ie_obio_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
union obio_attach_args *uoba = aux;
struct obio4_attach_args *oba;
if (uoba->uoba_isobio4 == 0)
return (0);
oba = &uoba->uoba_oba4;
return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr,
1, /* probe size */
0, /* offset */
0, /* flags */
NULL, NULL));
}
void
ie_obio_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
union obio_attach_args *uoba = aux;
struct obio4_attach_args *oba = &uoba->uoba_oba4;
struct ie_softc *sc = (void *) self;
bus_space_handle_t bh;
bus_dma_segment_t seg;
int rseg;
paddr_t pa;
struct intrhand *ih;
u_long iebase;
u_int8_t myaddr[ETHER_ADDR_LEN];
extern void myetheraddr(u_char *); /* should be elsewhere */
sc->bt = oba->oba_bustag;
sc->hwreset = ie_obreset;
sc->chan_attn = ie_obattend;
sc->hwinit = ie_obrun;
sc->memcopyout = ie_obio_memcopyout;
sc->memcopyin = ie_obio_memcopyin;
sc->ie_bus_read16 = ie_obio_read16;
sc->ie_bus_write16 = ie_obio_write16;
sc->ie_bus_write24 = ie_obio_write24;
sc->sc_msize = 65536; /* XXX */
if (obio_bus_map(oba->oba_bustag, oba->oba_paddr,
0,
sizeof(struct ieob),
BUS_SPACE_MAP_LINEAR,
0, &bh) != 0) {
printf("%s: cannot map registers\n", self->dv_xname);
return;
}
sc->sc_reg = (void *)bh;
/*
* Allocate control & buffer memory.
*/
if (bus_dmamem_alloc(oba->oba_dmatag, sc->sc_msize, 64*1024, 0,
&seg, 1, &rseg,
BUS_DMA_NOWAIT | BUS_DMA_24BIT) != 0) {
printf("%s @ obio: DMA memory allocation error\n",
self->dv_xname);
return;
}
#if 0
if (bus_dmamem_map(oba->oba_dmatag, &seg, rseg, sc->sc_msize,
(caddr_t *)&sc->sc_maddr,
BUS_DMA_NOWAIT|BUS_DMA_COHERENT) != 0) {
printf("%s @ obio: DMA memory map error\n", self->dv_xname);
bus_dmamem_free(oba->oba_dmatag, &seg, rseg);
return;
}
#else
/*
* We happen to know we can use the DVMA address directly as
* a CPU virtual address on machines where this driver can
* attach (sun4's). So we possibly save a MMU resource
* by not asking for a double mapping.
*/
sc->sc_maddr = (void *)seg.ds_addr;
#endif
wzero(sc->sc_maddr, sc->sc_msize);
sc->bh = (bus_space_handle_t)(sc->sc_maddr);
/*
* The i82586's 24-bit address space maps to the last 16MB of
* KVA space (). In addition, the SCP must appear
* at IE_SCP_ADDR within the 24-bit address space,
* i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of
* kernel space. We double-map this last page to the first
* page (starting at `maddr') of the memory we allocate to the chip.
* (a side-effect of this double-map is that the ISCP and SCB
* structures also get aliased there, but we ignore this). The
* first page at `maddr' is only used for ISCP, SCB and the aliased
* SCP; the actual buffers start at maddr+NBPG.
*
* In a picture:
|---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-|
| | | | | | |
| |<----- NBPG --->| | |<----- NBPG -+-->|
| |<------------- msize ------------->| | ^ |
| | | |
| \@maddr (last page dbl mapped)
| |
\@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+
*
*/
/* Double map the SCP */
if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == FALSE)
panic("ie pmap_extract");
pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR),
pa | PMAP_NC /*| PMAP_IOC*/,
VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED);
/* Map iscp at location 0 (relative to `maddr') */
sc->iscp = 0;
/* scb follows iscp */
sc->scb = IE_ISCP_SZ;
/* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */
sc->scp = IE_SCP_ADDR & PGOFSET;
/* Calculate the 24-bit base of i82586 operations */
iebase = (u_long)seg.ds_addr - (u_long)IEOB_ADBASE;
ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb);
ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase);
ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp);
/*
* Rest of first page is unused (wasted!); the other pages
* are used for buffers.
*/
sc->buf_area = NBPG;
sc->buf_area_sz = sc->sc_msize - NBPG;
if (i82586_proberam(sc) == 0) {
printf(": memory probe failed\n");
return;
}
myetheraddr(myaddr);
i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]);
/* Establish interrupt channel */
ih = bus_intr_establish(oba->oba_bustag,
oba->oba_pri, 0,
i82586_intr, sc);
}