1/*	$NetBSD: if_ie_sebuf.c,v 1.15 2008/04/28 20:23:37 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Machine-dependent glue for the Intel Ethernet (ie) driver,
34 * as found on the Sun3/E SCSI/Ethernet board.
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: if_ie_sebuf.c,v 1.15 2008/04/28 20:23:37 martin Exp $");
39
40#include "opt_inet.h"
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/device.h>
45#include <sys/protosw.h>
46#include <sys/socket.h>
47#include <net/if.h>
48#include <net/if_ether.h>
49
50#ifdef INET
51#include <netinet/in.h>
52#include <netinet/in_systm.h>
53#include <netinet/in_var.h>
54#include <netinet/ip.h>
55#include <netinet/if_inarp.h>
56#endif
57
58#include <machine/autoconf.h>
59#include <machine/cpu.h>
60#include <machine/dvma.h>
61#include <machine/idprom.h>
62#include <machine/vmparam.h>
63
64#include "i82586.h"
65#include "if_iereg.h"
66#include "if_ievar.h"
67#include "sereg.h"
68#include "sevar.h"
69
70static void ie_sebuf_reset(struct ie_softc *);
71static void ie_sebuf_attend(struct ie_softc *);
72static void ie_sebuf_run(struct ie_softc *);
73
74/*
75 * zero/copy functions: OBIO can use the normal functions, but VME
76 *    must do only byte or half-word (16 bit) accesses...
77 */
78static void *wmemcpy(void *, const void *, size_t);
79static void *wmemset(void *, int, size_t);
80
81
82/*
83 * New-style autoconfig attachment
84 */
85
86static int  ie_sebuf_match(device_t, cfdata_t, void *);
87static void ie_sebuf_attach(device_t, device_t, void *);
88
89CFATTACH_DECL_NEW(ie_sebuf, sizeof(struct ie_softc),
90    ie_sebuf_match, ie_sebuf_attach, NULL, NULL);
91
92static int
93ie_sebuf_match(device_t parent, cfdata_t cf, void *args)
94{
95	struct sebuf_attach_args *aa = args;
96
97	/* Match by name. */
98	if (strcmp(aa->name, "ie"))
99		return 0;
100
101	/* Anyting else to check? */
102
103	return 1;
104}
105
106static void
107ie_sebuf_attach(device_t parent, device_t self, void *args)
108{
109	struct ie_softc *sc = device_private(self);
110	struct sebuf_attach_args *aa = args;
111	volatile struct ie_regs *regs;
112	int     off;
113
114	sc->sc_dev = self;
115	sc->hard_type = IE_VME3E;
116	sc->reset_586 = ie_sebuf_reset;
117	sc->chan_attn = ie_sebuf_attend;
118	sc->run_586   = ie_sebuf_run;
119	sc->sc_memcpy = wmemcpy;
120	sc->sc_memset = wmemset;
121
122	/* Control regs mapped by parent. */
123	sc->sc_reg = aa->regs;
124	regs = (struct ie_regs *)sc->sc_reg;
125
126	/*
127	 * On this hardware, the i82586 address zero
128	 * maps to the start of the board, which we
129	 * happen to know is 128K below (XXX).
130	 */
131	sc->sc_iobase = aa->buf - 0x20000;
132
133	/*
134	 * There is 128K of memory for the i82586 on
135	 * the Sun3/E SCSI/Ethernet board, and the
136	 * "sebuf" driver has mapped it in for us.
137	 * (Fixed in hardware; NOT configurable!)
138	 */
139	if (aa->blen < SE_IEBUFSIZE)
140		panic("ie_sebuf: bad size");
141	sc->sc_msize = SE_IEBUFSIZE;
142	sc->sc_maddr = aa->buf;
143
144	/* Clear the memory. */
145	(sc->sc_memset)(sc->sc_maddr, 0, sc->sc_msize);
146
147	/*
148	 * XXX:  Unfortunately, the common driver code
149	 * is not ready to deal with more than 64K of
150	 * memory, so skip the first 64K.  Too bad.
151	 * Note: device needs the SCP at the end.
152	 */
153	sc->sc_msize -= 0x10000;
154	sc->sc_maddr = (char *)sc->sc_maddr + 0x10000;
155
156	/*
157	 * Set the System Configuration Pointer (SCP).
158	 * Its location is system-dependent because the
159	 * i82586 reads it from a fixed physical address.
160	 * On this hardware, the i82586 address is just
161	 * masked down to 17 bits, so the SCP is found
162	 * at the end of the RAM on the VME board.
163	 */
164	off = IE_SCP_ADDR & 0xFFFF;
165	sc->scp = (volatile void *)((char *)sc->sc_maddr + off);
166
167	/*
168	 * The rest of ram is used for buffers, etc.
169	 */
170	sc->buf_area = sc->sc_maddr;
171	sc->buf_area_sz = off;
172
173	/* Install interrupt handler. */
174	regs->ie_ivec = aa->ca.ca_intvec;
175	isr_add_vectored(ie_intr, sc, aa->ca.ca_intpri, aa->ca.ca_intvec);
176
177	/* Set the ethernet address. */
178	idprom_etheraddr(sc->sc_addr);
179
180	/* Do machine-independent parts of attach. */
181	ie_attach(sc);
182
183}
184
185/* Whack the "channel attetion" line. */
186void
187ie_sebuf_attend(struct ie_softc *sc)
188{
189	volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg;
190
191	regs->ie_csr |= IE_CSR_ATTEN;	/* flag! */
192	regs->ie_csr &= ~IE_CSR_ATTEN;	/* down. */
193}
194
195/*
196 * This is called during driver attach.
197 * Reset and initialize.
198 */
199void
200ie_sebuf_reset(struct ie_softc *sc)
201{
202	volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg;
203	regs->ie_csr = IE_CSR_RESET;
204	delay(20);
205	regs->ie_csr = (IE_CSR_NOLOOP | IE_CSR_IENAB);
206}
207
208/*
209 * This is called at the end of ieinit().
210 * optional.
211 */
212void
213ie_sebuf_run(struct ie_softc *sc)
214{
215
216	/* do it all in reset */
217}
218
219/*
220 * wmemcpy/wmemset - like memcpy/memset but largest access is 16-bits,
221 * and also does byte swaps...
222 * XXX - Would be nice to have asm versions in some library...
223 */
224
225static void *
226wmemset(void *vb, int val, size_t l)
227{
228	uint8_t *b = vb;
229	uint8_t *be = b + l;
230	uint16_t *sp;
231
232	if (l == 0)
233		return vb;
234
235	/* front, */
236	if ((uint32_t)b & 1)
237		*b++ = val;
238
239	/* back, */
240	if (b != be && ((uint32_t)be & 1) != 0) {
241		be--;
242		*be = val;
243	}
244
245	/* and middle. */
246	sp = (uint16_t *)b;
247	while (sp != (uint16_t *)be)
248		*sp++ = val;
249
250	return vb;
251}
252
253static void *
254wmemcpy(void *dst, const void *src, size_t l)
255{
256	const uint8_t *b1e, *b1 = src;
257	uint8_t *b2 = dst;
258	const uint16_t *sp;
259	int bstore = 0;
260
261	if (l == 0)
262		return dst;
263
264	/* front, */
265	if ((uint32_t)b1 & 1) {
266		*b2++ = *b1++;
267		l--;
268	}
269
270	/* middle, */
271	sp = (const uint16_t *)b1;
272	b1e = b1 + l;
273	if (l & 1)
274		b1e--;
275	bstore = (uint32_t)b2 & 1;
276
277	while (sp < (const uint16_t *)b1e) {
278		if (bstore) {
279			b2[1] = *sp & 0xff;
280			b2[0] = *sp >> 8;
281		} else
282			*((uint16_t *)b2) = *sp;
283		sp++;
284		b2 += 2;
285	}
286
287	/* and back. */
288	if (l & 1)
289		*b2 = *b1e;
290
291	return dst;
292}
293