NetBSD-5.0.2/sys/dev/ic/we.c
/* $NetBSD: we.c,v 1.15 2008/04/28 20:23:51 martin Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/
/*
* Device driver for National Semiconductor DS8390/WD83C690 based ethernet
* adapters.
*
* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
*
* Copyright (C) 1993, David Greenman. This software may be used, modified,
* copied, distributed, and sold, in both source and binary form provided that
* the above copyright and these terms are retained. Under no circumstances is
* the author responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with its use.
*/
/*
* Device driver for the Western Digital/SMC 8003 and 8013 series,
* and the SMC Elite Ultra (8216).
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: we.c,v 1.15 2008/04/28 20:23:51 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <sys/bus.h>
#include <sys/bswap.h>
#include <sys/intr.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>
#include <dev/ic/wereg.h>
#include <dev/ic/wevar.h>
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_read_region_stream_2 bus_space_read_region_2
#define bus_space_write_stream_2 bus_space_write_2
#define bus_space_write_region_stream_2 bus_space_write_region_2
#endif
static void we_set_media(struct we_softc *, int);
static void we_media_init(struct dp8390_softc *);
static int we_mediachange(struct dp8390_softc *);
static void we_mediastatus(struct dp8390_softc *, struct ifmediareq *);
static void we_recv_int(struct dp8390_softc *);
static void we_init_card(struct dp8390_softc *);
static int we_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
static int we_ring_copy(struct dp8390_softc *, int, void *, u_short);
static void we_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
static int we_test_mem(struct dp8390_softc *);
static inline void we_readmem(struct we_softc *, int, u_int8_t *, int);
/*
* Delay needed when switching 16-bit access to shared memory.
*/
#define WE_DELAY(wsc) delay(3)
/*
* Enable card RAM, and 16-bit access.
*/
#define WE_MEM_ENABLE(wsc) \
if (((wsc)->sc_flags & WE_16BIT_NOTOGGLE) == 0) { \
if ((wsc)->sc_flags & WE_16BIT_ENABLE) \
bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \
WE_LAAR, (wsc)->sc_laar_proto | WE_LAAR_M16EN); \
bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \
WE_MSR, wsc->sc_msr_proto | WE_MSR_MENB); \
WE_DELAY((wsc)); \
}
/*
* Disable card RAM, and 16-bit access.
*/
#define WE_MEM_DISABLE(wsc) \
if (((wsc)->sc_flags & WE_16BIT_NOTOGGLE) == 0) { \
bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \
WE_MSR, (wsc)->sc_msr_proto); \
if ((wsc)->sc_flags & WE_16BIT_ENABLE) \
bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \
WE_LAAR, (wsc)->sc_laar_proto); \
WE_DELAY((wsc)); \
}
int
we_config(device_t self, struct we_softc *wsc, const char *typestr)
{
struct dp8390_softc *sc = &wsc->sc_dp8390;
u_int8_t x;
int i, forced_16bit = 0;
/*
* Allow user to override 16-bit mode. 8-bit takes precedence.
*/
if (device_cfdata(self)->cf_flags & DP8390_FORCE_16BIT_MODE) {
wsc->sc_flags |= WE_16BIT_ENABLE;
forced_16bit = 1;
}
if (device_cfdata(self)->cf_flags & DP8390_FORCE_8BIT_MODE)
wsc->sc_flags &= ~WE_16BIT_ENABLE;
/* Registers are linear. */
for (i = 0; i < 16; i++)
sc->sc_reg_map[i] = i;
/* Now we can use the NIC_{GET,PUT}() macros. */
aprint_normal_dev(self, "%s Ethernet (%s-bit)\n",
typestr, wsc->sc_flags & WE_16BIT_ENABLE ? "16" : "8");
/* Get station address from EEPROM. */
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->sc_enaddr[i] = bus_space_read_1(wsc->sc_asict,
wsc->sc_asich, WE_PROM + i);
/*
* Set upper address bits and 8/16 bit access to shared memory.
*/
if (sc->is790) {
wsc->sc_laar_proto =
bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR) &
~WE_LAAR_M16EN;
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR,
wsc->sc_laar_proto | (wsc->sc_flags & WE_16BIT_ENABLE ? WE_LAAR_M16EN : 0));
} else if ((wsc->sc_type & WE_SOFTCONFIG) ||
#ifdef TOSH_ETHER
(wsc->sc_type == WE_TYPE_TOSHIBA1) ||
(wsc->sc_type == WE_TYPE_TOSHIBA4) ||
#endif
(forced_16bit) ||
(wsc->sc_type == WE_TYPE_WD8013EBT)) {
wsc->sc_laar_proto = (wsc->sc_maddr >> 19) & WE_LAAR_ADDRHI;
if (wsc->sc_flags & WE_16BIT_ENABLE)
wsc->sc_laar_proto |= WE_LAAR_L16EN;
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR,
wsc->sc_laar_proto | (wsc->sc_flags & WE_16BIT_ENABLE ? WE_LAAR_M16EN : 0));
}
/*
* Set address and enable interface shared memory.
*/
if (sc->is790) {
/* XXX MAGIC CONSTANTS XXX */
x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, 0x04);
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 0x04, x | 0x80);
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 0x0b,
((wsc->sc_maddr >> 13) & 0x0f) |
((wsc->sc_maddr >> 11) & 0x40) |
(bus_space_read_1(wsc->sc_asict, wsc->sc_asich, 0x0b) & 0xb0));
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 0x04, x);
wsc->sc_msr_proto = 0x00;
sc->cr_proto = 0x00;
} else {
#ifdef TOSH_ETHER
if (wsc->sc_type == WE_TYPE_TOSHIBA1 ||
wsc->sc_type == WE_TYPE_TOSHIBA4) {
bus_space_write_1(wsc->sc_asict, wsc->sc_asich,
WE_MSR + 1,
((wsc->sc_maddr >> 8) & 0xe0) | 0x04);
bus_space_write_1(wsc->sc_asict, wsc->sc_asich,
WE_MSR + 2,
((wsc->sc_maddr >> 16) & 0x0f));
wsc->sc_msr_proto = WE_MSR_POW;
} else
#endif
wsc->sc_msr_proto = (wsc->sc_maddr >> 13) &
WE_MSR_ADDR;
sc->cr_proto = ED_CR_RD2;
}
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_MSR,
wsc->sc_msr_proto | WE_MSR_MENB);
WE_DELAY(wsc);
/*
* DCR gets:
*
* FIFO threshold to 8, No auto-init Remote DMA,
* byte order=80x86.
*
* 16-bit cards also get word-wide DMA transfers.
*/
sc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS |
(wsc->sc_flags & WE_16BIT_ENABLE ? ED_DCR_WTS : 0);
sc->test_mem = we_test_mem;
sc->ring_copy = we_ring_copy;
sc->write_mbuf = we_write_mbuf;
sc->read_hdr = we_read_hdr;
sc->recv_int = we_recv_int;
sc->init_card = we_init_card;
sc->sc_mediachange = we_mediachange;
sc->sc_mediastatus = we_mediastatus;
sc->mem_start = 0;
/* sc->mem_size has to be set by frontend */
sc->sc_flags = device_cfdata(self)->cf_flags;
/* Do generic parts of attach. */
if (wsc->sc_type & WE_SOFTCONFIG)
sc->sc_media_init = we_media_init;
else
sc->sc_media_init = dp8390_media_init;
if (dp8390_config(sc)) {
aprint_error_dev(self, "configuration failed\n");
return (1);
}
/*
* Disable 16-bit access to shared memory - we leave it disabled
* so that:
*
* (1) machines reboot properly when the board is set to
* 16-bit mode and there are conflicting 8-bit devices
* within the same 128k address space as this board's
* shared memory, and
*
* (2) so that other 8-bit devices with shared memory
* in this same 128k address space will work.
*/
WE_MEM_DISABLE(wsc);
return (0);
}
static int
we_test_mem(struct dp8390_softc *sc)
{
struct we_softc *wsc = (struct we_softc *)sc;
bus_space_tag_t memt = sc->sc_buft;
bus_space_handle_t memh = sc->sc_bufh;
bus_size_t memsize = sc->mem_size;
int i;
if (wsc->sc_flags & WE_16BIT_ENABLE)
bus_space_set_region_2(memt, memh, 0, 0, memsize >> 1);
else
bus_space_set_region_1(memt, memh, 0, 0, memsize);
if (wsc->sc_flags & WE_16BIT_ENABLE) {
for (i = 0; i < memsize; i += 2) {
if (bus_space_read_2(memt, memh, i) != 0)
goto fail;
}
} else {
for (i = 0; i < memsize; i++) {
if (bus_space_read_1(memt, memh, i) != 0)
goto fail;
}
}
return (0);
fail:
aprint_error_dev(sc->sc_dev,
"failed to clear shared memory at offset 0x%x\n", i);
WE_MEM_DISABLE(wsc);
return (1);
}
/*
* Given a NIC memory source address and a host memory destination address,
* copy 'len' from NIC to host using shared memory. The 'len' is rounded
* up to a word - ok as long as mbufs are word-sized.
*/
static inline void
we_readmem(struct we_softc *wsc, int from, u_int8_t *to, int len)
{
bus_space_tag_t memt = wsc->sc_dp8390.sc_buft;
bus_space_handle_t memh = wsc->sc_dp8390.sc_bufh;
if (len & 1)
++len;
if (wsc->sc_flags & WE_16BIT_ENABLE)
bus_space_read_region_stream_2(memt, memh, from,
(u_int16_t *)to, len >> 1);
else
bus_space_read_region_1(memt, memh, from,
to, len);
}
static int
we_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
{
struct we_softc *wsc = (struct we_softc *)sc;
bus_space_tag_t memt = wsc->sc_dp8390.sc_buft;
bus_space_handle_t memh = wsc->sc_dp8390.sc_bufh;
u_int8_t *data, savebyte[2];
int savelen, len, leftover;
#ifdef DIAGNOSTIC
u_int8_t *lim;
#endif
savelen = m->m_pkthdr.len;
WE_MEM_ENABLE(wsc);
/*
* 8-bit boards are simple; no alignment tricks are necessary.
*/
if ((wsc->sc_flags & WE_16BIT_ENABLE) == 0) {
for (; m != NULL; buf += m->m_len, m = m->m_next)
bus_space_write_region_1(memt, memh,
buf, mtod(m, u_int8_t *), m->m_len);
if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) {
bus_space_set_region_1(memt, memh,
buf, 0, ETHER_MIN_LEN - ETHER_CRC_LEN - savelen);
savelen = ETHER_MIN_LEN - ETHER_CRC_LEN;
}
goto out;
}
/* Start out with no leftover data. */
leftover = 0;
savebyte[0] = savebyte[1] = 0;
for (; m != NULL; m = m->m_next) {
len = m->m_len;
if (len == 0)
continue;
data = mtod(m, u_int8_t *);
#ifdef DIAGNOSTIC
lim = data + len;
#endif
while (len > 0) {
if (leftover) {
/*
* Data left over (from mbuf or realignment).
* Buffer the next byte, and write it and
* the leftover data out.
*/
savebyte[1] = *data++;
len--;
bus_space_write_stream_2(memt, memh, buf,
*(u_int16_t *)savebyte);
buf += 2;
leftover = 0;
} else if (BUS_SPACE_ALIGNED_POINTER(data, u_int16_t)
== 0) {
/*
* Unaligned dta; buffer the next byte.
*/
savebyte[0] = *data++;
len--;
leftover = 1;
} else {
/*
* Aligned data; output contiguous words as
* much as we can, then buffer the remaining
* byte, if any.
*/
leftover = len & 1;
len &= ~1;
bus_space_write_region_stream_2(memt, memh,
buf, (u_int16_t *)data, len >> 1);
data += len;
buf += len;
if (leftover)
savebyte[0] = *data++;
len = 0;
}
}
if (len < 0)
panic("we_write_mbuf: negative len");
#ifdef DIAGNOSTIC
if (data != lim)
panic("we_write_mbuf: data != lim");
#endif
}
if (leftover) {
savebyte[1] = 0;
bus_space_write_stream_2(memt, memh, buf,
*(u_int16_t *)savebyte);
buf += 2;
}
if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) {
bus_space_set_region_2(memt, memh,
buf, 0, (ETHER_MIN_LEN - ETHER_CRC_LEN - savelen) >> 1);
savelen = ETHER_MIN_LEN - ETHER_CRC_LEN;
}
out:
WE_MEM_DISABLE(wsc);
return (savelen);
}
static int
we_ring_copy(struct dp8390_softc *sc, int src, void *dstv, u_short amount)
{
char *dst = dstv;
struct we_softc *wsc = (struct we_softc *)sc;
u_short tmp_amount;
/* Does copy wrap to lower addr in ring buffer? */
if (src + amount > sc->mem_end) {
tmp_amount = sc->mem_end - src;
/* Copy amount up to end of NIC memory. */
we_readmem(wsc, src, dst, tmp_amount);
amount -= tmp_amount;
src = sc->mem_ring;
dst += tmp_amount;
}
we_readmem(wsc, src, dst, amount);
return (src + amount);
}
static void
we_read_hdr(struct dp8390_softc *sc, int packet_ptr,
struct dp8390_ring *packet_hdrp)
{
struct we_softc *wsc = (struct we_softc *)sc;
we_readmem(wsc, packet_ptr, (u_int8_t *)packet_hdrp,
sizeof(struct dp8390_ring));
#if BYTE_ORDER == BIG_ENDIAN
packet_hdrp->count = bswap16(packet_hdrp->count);
#endif
}
static void
we_recv_int(struct dp8390_softc *sc)
{
struct we_softc *wsc = (struct we_softc *)sc;
WE_MEM_ENABLE(wsc);
dp8390_rint(sc);
WE_MEM_DISABLE(wsc);
}
static void
we_media_init(struct dp8390_softc *sc)
{
struct we_softc *wsc = (void *) sc;
int defmedia = IFM_ETHER;
u_int8_t x;
if (sc->is790) {
x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR);
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR,
x | WE790_HWR_SWH);
if (bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_GCR) &
WE790_GCR_GPOUT)
defmedia |= IFM_10_2;
else
defmedia |= IFM_10_5;
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR,
x & ~WE790_HWR_SWH);
} else {
x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_IRR);
if (x & WE_IRR_OUT2)
defmedia |= IFM_10_2;
else
defmedia |= IFM_10_5;
}
ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_2, 0, NULL);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_5, 0, NULL);
ifmedia_set(&sc->sc_media, defmedia);
}
static int
we_mediachange(struct dp8390_softc *sc)
{
/*
* Current media is already set up. Just reset the interface
* to let the new value take hold. The new media will be
* set up in we_init_card() called via dp8390_init().
*/
dp8390_reset(sc);
return (0);
}
static void
we_mediastatus(struct dp8390_softc *sc, struct ifmediareq *ifmr)
{
struct ifmedia *ifm = &sc->sc_media;
/*
* The currently selected media is always the active media.
*/
ifmr->ifm_active = ifm->ifm_cur->ifm_media;
}
static void
we_init_card(struct dp8390_softc *sc)
{
struct we_softc *wsc = (struct we_softc *)sc;
struct ifmedia *ifm = &sc->sc_media;
if (wsc->sc_init_hook)
(*wsc->sc_init_hook)(wsc);
we_set_media(wsc, ifm->ifm_cur->ifm_media);
}
static void
we_set_media(struct we_softc *wsc, int media)
{
struct dp8390_softc *sc = &wsc->sc_dp8390;
bus_space_tag_t asict = wsc->sc_asict;
bus_space_handle_t asich = wsc->sc_asich;
u_int8_t hwr, gcr, irr;
if (sc->is790) {
hwr = bus_space_read_1(asict, asich, WE790_HWR);
bus_space_write_1(asict, asich, WE790_HWR,
hwr | WE790_HWR_SWH);
gcr = bus_space_read_1(asict, asich, WE790_GCR);
if (IFM_SUBTYPE(media) == IFM_10_2)
gcr |= WE790_GCR_GPOUT;
else
gcr &= ~WE790_GCR_GPOUT;
bus_space_write_1(asict, asich, WE790_GCR,
gcr | WE790_GCR_LIT);
bus_space_write_1(asict, asich, WE790_HWR,
hwr & ~WE790_HWR_SWH);
return;
}
irr = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_IRR);
if (IFM_SUBTYPE(media) == IFM_10_2)
irr |= WE_IRR_OUT2;
else
irr &= ~WE_IRR_OUT2;
bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_IRR, irr);
}