NetBSD/sys/arch/arm26/podulebus/if_ei.c

372 lines
10 KiB
C

/* $NetBSD: if_ei.c,v 1.1 2000/05/09 21:56:03 bjh21 Exp $ */
/*-
* Copyright (c) 2000 Ben Harris
* 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. 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.
*/
/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
/*
* if_ei.c -- driver for Acorn AKA25 Ether1 card
*/
/*
* This is not directly based on the arm32 ie driver, as that doesn't
* use the MI 82586 driver, and generally looks a mess (not to mention
* having dodgy copyright status). Let's try again.
*/
#include <sys/param.h>
__RCSID("$NetBSD: if_ei.c,v 1.1 2000/05/09 21:56:03 bjh21 Exp $");
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <machine/bus.h>
#include <machine/irq.h>
#include <dev/ic/i82586reg.h>
#include <dev/ic/i82586var.h>
#include <arch/arm26/podulebus/podulebus.h>
#include <arch/arm32/podulebus/podules.h>
#include <arch/arm26/podulebus/if_eireg.h>
/* Callbacks from the MI 82586 driver */
static void ei_hwreset(struct ie_softc *, int);
/* static void ei_hwinit(struct ie_softc *); */
static void ei_attn(struct ie_softc *);
static int ei_intrhook(struct ie_softc *, int);
static void ei_copyin(struct ie_softc *, void *, int, size_t);
static void ei_copyout(struct ie_softc *, const void *, int, size_t);
static u_int16_t ei_read16(struct ie_softc *, int);
static void ei_write16(struct ie_softc *, int, u_int16_t);
static void ei_write24(struct ie_softc *, int, int);
/* autoconfiguration glue */
static int ei_match(struct device *, struct cfdata *, void *);
static void ei_attach(struct device *, struct device *, void *);
struct ei_softc {
struct ie_softc sc_ie;
bus_space_tag_t sc_ctl_t;
bus_space_handle_t sc_ctl_h;
bus_space_tag_t sc_mem_t;
bus_space_handle_t sc_mem_h;
bus_space_tag_t sc_rom_t;
bus_space_handle_t sc_rom_h;
u_int8_t sc_idrom[EI_ROMSIZE];
struct irq_handler *sc_ih;
};
struct cfattach ei_ca = {
sizeof(struct ei_softc), ei_match, ei_attach
};
static inline void
ei_setpage(struct ei_softc *sc, int page)
{
bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_PAGE, page);
}
static inline void
ei_cli(struct ei_softc *sc)
{
bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_CLI);
}
static int
ei_match(struct device *parent, struct cfdata *cf, void *aux)
{
struct podulebus_attach_args *pa = aux;
return IS_PODULE(pa, MANUFACTURER_ACORN, PODULE_ACORN_ETHER1);
}
static void
ei_attach(struct device *parent, struct device *self, void *aux)
{
struct podulebus_attach_args *pa = aux;
struct ei_softc *sc = (struct ei_softc *)self;
int i;
char descr[16];
/* Set up bus spaces */
sc->sc_ctl_t = sc->sc_mem_t = pa->pa_fast_t;
bus_space_subregion(sc->sc_ctl_t, pa->pa_fast_h,
0, EI_MEMOFF, &sc->sc_ctl_h);
bus_space_subregion(sc->sc_mem_t, pa->pa_fast_h,
EI_MEMOFF, EI_PAGESIZE / 2, &sc->sc_mem_h);
sc->sc_rom_t = pa->pa_sync_t;
sc->sc_rom_h = pa->pa_sync_h;
/* Set up callbacks */
sc->sc_ie.hwinit = NULL;
sc->sc_ie.intrhook = ei_intrhook;
sc->sc_ie.hwreset = ei_hwreset;
sc->sc_ie.chan_attn = ei_attn;
sc->sc_ie.memcopyin = ei_copyin;
sc->sc_ie.memcopyout = ei_copyout;
sc->sc_ie.ie_bus_read16 = ei_read16;
sc->sc_ie.ie_bus_write16 = ei_write16;
sc->sc_ie.ie_bus_write24 = ei_write24;
sc->sc_ie.do_xmitnopchain = 0; /* Does it listen? */
sc->sc_ie.sc_mediachange = NULL;
sc->sc_ie.sc_mediastatus = NULL;
sc->sc_ie.bt = sc->sc_mem_t; /* XXX hope it doesn't use them */
sc->sc_ie.bh = sc->sc_mem_h;
printf(":");
/* All Ether1s are 64k (I believe) */
sc->sc_ie.sc_msize = EI_MEMSIZE;
/* set up pointers to important on-card control structures */
sc->sc_ie.iscp = 0;
sc->sc_ie.scb = IE_ISCP_SZ;
sc->sc_ie.scp = sc->sc_ie.sc_msize + IE_SCP_ADDR - (1 << 24);
sc->sc_ie.buf_area = sc->sc_ie.scb + IE_SCB_SZ;
sc->sc_ie.buf_area_sz =
sc->sc_ie.sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ;
/* Wipe the whole of the card's memory */
for (i = 0; i < EI_NPAGES; i++) {
ei_setpage(sc, i);
bus_space_set_region_2(sc->sc_mem_t, sc->sc_mem_h,
0, 0,EI_PAGESIZE / 2);
}
/* set up pointers to key structures */
ei_write24(&sc->sc_ie, IE_SCP_ISCP((u_long)sc->sc_ie.scp),
(u_long) sc->sc_ie.iscp);
ei_write16(&sc->sc_ie, IE_ISCP_SCB((u_long)sc->sc_ie.iscp),
(u_long) sc->sc_ie.scb);
ei_write24(&sc->sc_ie, IE_ISCP_BASE((u_long)sc->sc_ie.iscp),
(u_long) sc->sc_ie.iscp);
/* check if chip answers */
if (i82586_proberam(&sc->sc_ie) == 0) {
printf(" memory probe failed\n");
return;
}
/* Read ROM */
bus_space_read_region_1(sc->sc_rom_t, sc->sc_rom_h, 0,
sc->sc_idrom, EI_ROMSIZE);
snprintf(descr, 15, "AKA25 iss. %d", sc->sc_idrom[EI_ROM_HWREV]);
i82586_attach(&sc->sc_ie, descr, sc->sc_idrom + EI_ROM_EADDR,
NULL, 0, 0);
sc->sc_ih = podulebus_irq_establish(self->dv_parent, pa->pa_slotnum,
IPL_NET, i82586_intr, self);
printf("%s: interrupting at %s\n",
self->dv_xname, irq_string(sc->sc_ih));
ei_cli(sc);
irq_enable(sc->sc_ih);
}
static void
ei_hwreset(struct ie_softc *sc_ie, int why)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h,
EI_CONTROL, EI_CTL_RESET);
DELAY(1000);
bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, 0);
DELAY(1000);
ei_cli(sc);
}
static int
ei_intrhook(struct ie_softc *sc_ie, int why)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
switch (why) {
case INTR_EXIT:
case INTR_ACK:
ei_cli(sc);
break;
}
return 0;
}
static void
ei_attn(struct ie_softc *sc_ie)
{
struct ei_softc *sc = (void *)sc_ie;
bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_ATTN);
}
/*
* Various access functions to allow the MI 82586 driver to get at the
* board's memory. All memory accesses must go through these, as
* nothing else knows how to manipulate the page register. Note that
* all addresses and lengths passed in are in bytes of actual data.
* The bus_space functions deal in words, though, so we have to
* convert on the way through.
*/
static void
ei_copyin(struct ie_softc *sc_ie, void *dest, int src, size_t size)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
int cnt, s, extra_byte;
#ifdef DIAGNOSTIC
if (src % 2 != 0 || !ALIGNED_POINTER(dest, u_int16_t))
panic("%s: unaligned copyin", sc_ie->sc_dev.dv_xname);
#endif
extra_byte = size % 2;
size -= extra_byte;
while (size > 0) {
cnt = EI_PAGESIZE - src % EI_PAGESIZE;
if (cnt > size)
cnt = size;
s = splnet();
ei_setpage(sc, ei_atop(src));
/* bus ops are in words */
bus_space_read_region_2(sc->sc_mem_t, sc->sc_mem_h,
ei_atopo(src) / 2, dest, cnt / 2);
splx(s);
src += cnt;
dest += cnt;
size -= cnt;
}
if (extra_byte) {
/* Do we need to be this careful? */
s = splnet();
ei_setpage(sc, ei_atop(src));
*(u_int8_t *)dest =
bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h,
ei_atopo(src) / 2) & 0xff;
splx(s);
}
}
static void
ei_copyout(struct ie_softc *sc_ie, const void *src, int dest, size_t size)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
int cnt, s;
u_int16_t *bounce = NULL;
#ifdef DIAGNOSTIC
if (dest % 2 != 0)
panic("%s: unaligned copyout", sc_ie->sc_dev.dv_xname);
#endif
if (!ALIGNED_POINTER(src, u_int16_t)) {
MALLOC(bounce, u_int16_t *, size, M_DEVBUF, M_NOWAIT);
if (bounce == NULL)
panic("%s: no memory to align copyout",
sc_ie->sc_dev.dv_xname);
memcpy(bounce, src, size);
src = bounce;
}
if (size % 2 != 0)
size++; /* This is safe, since the buffer is 16bit aligned */
while (size > 0) {
cnt = EI_PAGESIZE - dest % EI_PAGESIZE;
if (cnt > size)
cnt = size;
s = splnet();
ei_setpage(sc, ei_atop(dest));
/* bus ops are in words */
bus_space_write_region_2(sc->sc_mem_t, sc->sc_mem_h,
ei_atopo(dest) / 2, src, cnt / 2);
splx(s);
src += cnt;
dest += cnt;
size -= cnt;
}
if (bounce != NULL)
FREE(bounce, M_DEVBUF);
}
static u_int16_t
ei_read16(struct ie_softc *sc_ie, int addr)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
int result, s;
#ifdef DIAGNOSTIC
if (addr % 2 != 0)
panic("%s: unaligned read16", sc_ie->sc_dev.dv_xname);
#endif
s = splnet();
ei_setpage(sc, ei_atop(addr));
result = bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h,
ei_atopo(addr) / 2);
splx(s);
return result;
}
static void
ei_write16(struct ie_softc *sc_ie, int addr, u_int16_t value)
{
struct ei_softc *sc = (struct ei_softc *)sc_ie;
int s;
#ifdef DIAGNOSTIC
if (addr % 2 != 0)
panic("%s: unaligned write16", sc_ie->sc_dev.dv_xname);
#endif
s = splnet();
ei_setpage(sc, ei_atop(addr));
bus_space_write_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(addr) / 2,
value);
splx(s);
}
static void
ei_write24(struct ie_softc *sc_ie, int addr, int value)
{
int s;
#ifdef DIAGNOSTIC
if (addr % 2 != 0)
panic("%s: unaligned write24", sc_ie->sc_dev.dv_xname);
#endif
s = splnet();
ei_write16(sc_ie, addr, value & 0xffff);
ei_write16(sc_ie, addr + 2, (value >> 16) & 0xff);
splx(s);
}