pciide.c revision 1.6 
1/*	$NetBSD: pciide.c,v 1.6 2007/08/03 13:15:56 tsutsui Exp $	*/
2
3/*-
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *        This product includes software developed by the NetBSD
18 *        Foundation, Inc. and its contributors.
19 * 4. Neither the name of The NetBSD Foundation nor the names of its
20 *    contributors may be used to endorse or promote products derived
21 *    from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#include <sys/types.h>
37#include <lib/libsa/stand.h>
38#include <mips/cpuregs.h>
39
40#include "boot.h"
41#include "wdvar.h"
42
43#define COBALT_IO_SPACE_BASE	0x10000000	/* XXX VT82C586 ISA I/O space */
44
45int
46pciide_init(struct wdc_channel *chp, u_int *unit)
47{
48	uint32_t cmdreg, ctlreg;
49	int i, compatchan = 0;
50
51	/*
52	 * two channels per chip, two drives per channel
53	 */
54	compatchan = *unit / PCIIDE_CHANNEL_NDEV;
55	if (compatchan >= PCIIDE_NUM_CHANNELS)
56		return (ENXIO);
57	*unit %= PCIIDE_CHANNEL_NDEV;
58
59	DPRINTF(("[pciide] unit: %d, channel: %d\n", *unit, compatchan));
60
61	/*
62	 * XXX map?
63	 */
64	cmdreg = MIPS_PHYS_TO_KSEG1(COBALT_IO_SPACE_BASE +
65	    PCIIDE_COMPAT_CMD_BASE(compatchan));
66	ctlreg = MIPS_PHYS_TO_KSEG1(COBALT_IO_SPACE_BASE +
67	    PCIIDE_COMPAT_CTL_BASE(compatchan));
68
69	/* set up cmd regsiters */
70	chp->c_cmdbase = (uint8_t *)cmdreg;
71	chp->c_data = (uint16_t *)(cmdreg + wd_data);
72	for (i = 0; i < WDC_NPORTS; i++)
73		chp->c_cmdreg[i] = chp->c_cmdbase + i;
74	/* set up shadow registers */
75	chp->c_cmdreg[wd_status]   = chp->c_cmdreg[wd_command];
76	chp->c_cmdreg[wd_features] = chp->c_cmdreg[wd_precomp];
77	/* set up ctl registers */
78	chp->c_ctlbase = (uint8_t *)ctlreg;
79
80	return 0;
81}
82