1/* $NetBSD: ne.c,v 1.6 2008/04/28 20:23:25 martin Exp $ */
2
3/*-
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
35 * adapters.
36 *
37 * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
38 *
39 * Copyright (C) 1993, David Greenman.  This software may be used, modified,
40 * copied, distributed, and sold, in both source and binary form provided that
41 * the above copyright and these terms are retained.  Under no circumstances is
42 * the author responsible for the proper functioning of this software, nor does
43 * the author assume any responsibility for damages incurred with its use.
44 */
45
46/*
47 * this code is mainly obtained from /sys/dev/ic/ne2000.c .
48 */
49
50#include <sys/types.h>
51#include <machine/pio.h>
52
53#include <lib/libsa/stand.h>
54#include <libi386.h>
55
56#ifdef _STANDALONE
57#include <lib/libkern/libkern.h>
58#include <bootinfo.h>
59#endif
60
61#include "etherdrv.h"
62#include <dev/ic/dp8390reg.h>
63#include <dev/ic/ne2000reg.h>
64#include "dp8390.h"
65#include "ne.h"
66
67#ifndef BASEREG
68#define BASEREG 0x300
69#endif
70
71#define	NE_BASEREG BASEREG
72#define NE_ASIC_BASEREG (NE_BASEREG+NE2000_ASIC_OFFSET)
73
74#define NIC_PORT(x) (NE_BASEREG + (x))
75#define NIC_INB(x) inb(NIC_PORT(x))
76#define NIC_OUTB(x, b) outb(NIC_PORT(x), (b))
77
78#define NE_16BIT
79
80#define DELAY(x) delay(x)
81
82#define ASIC_PORT(x) (NE_ASIC_BASEREG + (x))
83#define ASIC_INB(x) inb(ASIC_PORT(x))
84#define ASIC_INW(x) inw(ASIC_PORT(x))
85#define ASIC_OUTB(x, b) outb(ASIC_PORT(x), (b))
86#define ASIC_OUTW(x, b) outw(ASIC_PORT(x), (b))
87
88u_char eth_myaddr[6];
89
90#ifdef _STANDALONE
91static struct btinfo_netif bi_netif;
92#endif
93
94int
95EtherInit(unsigned char *myadr)
96{
97	uint8_t tmp;
98	int i;
99
100	printf("ne: trying iobase=0x%x\n", NE_BASEREG);
101
102	dp8390_iobase = NE_BASEREG;
103	dp8390_membase = dp8390_memsize = 8192*2;
104	dp8390_cr_proto = ED_CR_RD2;
105	dp8390_dcr_reg = ED_DCR_FT1 | ED_DCR_LS
106#ifdef NE_16BIT
107	| ED_DCR_WTS
108#endif
109	;
110
111	/* reset */
112	tmp = ASIC_INB(NE2000_ASIC_RESET);
113	DELAY(10000);
114	ASIC_OUTB(NE2000_ASIC_RESET, tmp);
115	DELAY(5000);
116
117	NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
118	DELAY(5000);
119
120	tmp = NIC_INB(ED_P0_CR);
121	if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
122		(ED_CR_RD2 | ED_CR_STP)) {
123		goto out;
124	}
125
126	tmp = NIC_INB(ED_P0_ISR);
127	if ((tmp & ED_ISR_RST) != ED_ISR_RST) {
128		goto out;
129	}
130
131	NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
132
133	for (i = 0; i < 100; i++) {
134		if ((NIC_INB(ED_P0_ISR) & ED_ISR_RST) ==
135		    ED_ISR_RST) {
136			/* Ack the reset bit. */
137			NIC_OUTB(ED_P0_ISR, ED_ISR_RST);
138			break;
139		}
140		DELAY(100);
141	}
142
143	printf("ne: found\n");
144
145	/*
146	 * This prevents packets from being stored in the NIC memory when
147	 * the readmem routine turns on the start bit in the CR.
148	 */
149	NIC_OUTB(ED_P0_RCR, ED_RCR_MON);
150
151	/* Temporarily initialize DCR for byte operations. */
152	NIC_OUTB(ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
153
154	NIC_OUTB(ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
155	NIC_OUTB(ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
156
157#ifdef HWADDR
158	for (i = 0; i < 6; i++)
159		myadr[i] = eth_myaddr[i] = HWADDR[i];
160#else
161{
162	uint8_t romdata[16];
163
164	ne2000_readmem(0, romdata, 16);
165	for (i = 0; i < 6; i++)
166		myadr[i] = eth_myaddr[i] = romdata[i*2];
167}
168#endif
169
170	if (dp8390_config())
171		goto out;
172
173#ifdef _STANDALONE
174	strncpy(bi_netif.ifname, "ne", sizeof(bi_netif.ifname));
175	bi_netif.bus = BI_BUS_ISA;
176	bi_netif.addr.iobase = NE_BASEREG;
177
178	BI_ADD(&bi_netif, BTINFO_NETIF, sizeof(bi_netif));
179#endif
180	return 1;
181out:
182	return 0;
183}
184
185void
186EtherStop(void) {
187	uint8_t tmp;
188
189	dp8390_stop();
190
191	tmp = ASIC_INB(NE2000_ASIC_RESET);
192	DELAY(10000);
193	ASIC_OUTB(NE2000_ASIC_RESET, tmp);
194	DELAY(5000);
195
196	NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
197	DELAY(5000);
198}
199
200void
201ne2000_writemem(uint8_t *src, int dst, size_t len)
202{
203	size_t i;
204	int maxwait = 100;	/* about 120us */
205
206	/* Select page 0 registers. */
207	NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
208
209	/* Reset remote DMA complete flag. */
210	NIC_OUTB(ED_P0_ISR, ED_ISR_RDC);
211
212	/* Set up DMA byte count. */
213	NIC_OUTB(ED_P0_RBCR0, len);
214	NIC_OUTB(ED_P0_RBCR1, len >> 8);
215
216	/* Set up destination address in NIC mem. */
217	NIC_OUTB(ED_P0_RSAR0, dst);
218	NIC_OUTB(ED_P0_RSAR1, dst >> 8);
219
220	/* Set remote DMA write. */
221	NIC_OUTB(ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
222
223#ifdef NE_16BIT
224	for (i = 0; i < len; i += 2, src += 2)
225		ASIC_OUTW(NE2000_ASIC_DATA, *(uint16_t *)src);
226#else
227	for (i = 0; i < len; i++)
228		ASIC_OUTB(NE2000_ASIC_DATA, *src++);
229#endif
230
231	/*
232	 * Wait for remote DMA to complete.  This is necessary because on the
233	 * transmit side, data is handled internally by the NIC in bursts, and
234	 * we can't start another remote DMA until this one completes.  Not
235	 * waiting causes really bad things to happen - like the NIC wedging
236	 * the bus.
237	 */
238	while (((NIC_INB(ED_P0_ISR) & ED_ISR_RDC) != ED_ISR_RDC) && --maxwait)
239		DELAY(1);
240
241	if (maxwait == 0)
242		printf("ne2000_writemem: failed to complete\n");
243}
244
245void
246ne2000_readmem(int src, uint8_t *dst, size_t amount)
247{
248	size_t i;
249
250	/* Select page 0 registers. */
251	NIC_OUTB(ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
252
253	/* Round up to a word. */
254	if (amount & 1)
255		++amount;
256
257	/* Set up DMA byte count. */
258	NIC_OUTB(ED_P0_RBCR0, amount);
259	NIC_OUTB(ED_P0_RBCR1, amount >> 8);
260
261	/* Set up source address in NIC mem. */
262	NIC_OUTB(ED_P0_RSAR0, src);
263	NIC_OUTB(ED_P0_RSAR1, src >> 8);
264
265	NIC_OUTB(ED_P0_CR, ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
266
267#ifdef NE_16BIT
268	for (i = 0; i < amount; i += 2, dst += 2)
269		*(uint16_t *)dst = ASIC_INW(NE2000_ASIC_DATA);
270#else
271	for (i = 0; i < amount; i++)
272		*dst++ = ASIC_INB(NE2000_ASIC_DATA);
273#endif
274}
275