cy_pci.c revision 42691 
1/*
2 * Copyright (c) 1996, David Greenman
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 *	$Id: cy_pci.c,v 1.9 1999/01/11 23:43:54 bde Exp $
28 */
29
30/*
31 * Cyclades Y PCI serial interface driver
32 */
33
34#include "pci.h"
35#if NPCI > 0
36
37#include "opt_cy_pci_fastintr.h"
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/interrupt.h>
42#include <sys/kernel.h>
43#include <vm/vm.h>
44#include <vm/pmap.h>
45
46#include <pci/pcivar.h>
47
48#include <pci/cy_pcireg.h>
49
50static const char *cy_probe		__P((pcici_t, pcidi_t));
51static void cy_attach		__P((pcici_t, int));
52
53extern int cyattach_common(void *, int); /* Not exactly correct */
54extern void cyintr(int);
55
56static u_long cy_count;
57
58static struct pci_device cy_device = {
59        "cy",
60        cy_probe,
61        cy_attach,
62        &cy_count,
63        NULL
64};
65DATA_SET(pcidevice_set, cy_device);
66
67static const char *
68cy_probe(config_id, device_id)
69	pcici_t config_id;
70	pcidi_t device_id;
71{
72	if ((device_id & 0xffff) == CY_VENDORID_CYCLADES &&
73	    ((device_id >> 16) == CY_DEVICEID_CYCLOM_Y_1 ||
74	     (device_id >> 16) == CY_DEVICEID_CYCLOM_Y_2))
75		return ("Cyclades Cyclom-Y Serial Adapter");
76	return NULL;
77}
78
79static void
80cy_attach(config_id, unit)
81	pcici_t config_id;
82	int unit;
83{
84	vm_offset_t paddr;
85	void *vaddr;
86	u_int32_t ioport;
87	int adapter;
88	u_char plx_ver;
89
90	ioport = (u_int32_t) pci_conf_read(config_id, CY_PCI_BASE_ADDR1) & ~0x3;
91	paddr = pci_conf_read(config_id, CY_PCI_BASE_ADDR2) & ~0xf;
92#if 0
93	if (!pci_map_mem(config_id, CY_PCI_BASE_ADDR2, &vaddr, &paddr)) {
94		printf("cy%d: couldn't map shared memory\n", unit);
95		return;
96	};
97#endif
98	vaddr = pmap_mapdev(paddr, 0x4000);
99
100	adapter = cyattach_common(vaddr, 1);
101	if (adapter < 0) {
102		/*
103		 * No ports found. Release resources and punt.
104		 */
105		printf("cy%d: no ports found!", unit);
106		goto fail;
107	}
108
109	/*
110	 * Allocate our interrupt.
111	 * XXX	Using the ISA interrupt handler directly is a bit of a violation
112	 *	since it doesn't actually take the same argument. For PCI, the
113	 *	argument is a void * token, but for ISA it is a unit. Since
114	 *	there is no overlap in PCI/ISA unit numbers for this driver, and
115	 *	since the ISA driver must handle the interrupt anyway, we use
116	 *	the unit number as the token even for PCI.
117	 */
118	if (
119#ifdef CY_PCI_FASTINTR
120	    !pci_map_int_right(config_id, (pci_inthand_t *)cyintr,
121			       (void *)adapter, &tty_imask,
122			       INTR_EXCL | INTR_FAST) &&
123#endif
124	    !pci_map_int_right(config_id, (pci_inthand_t *)cyintr,
125			       (void *)adapter, &tty_imask, 0)) {
126		printf("cy%d: couldn't map interrupt\n", unit);
127		goto fail;
128	}
129
130	/*
131	 * Enable the "local" interrupt input to generate a
132	 * PCI interrupt.
133	 */
134	plx_ver = *((u_char *)vaddr + PLX_VER) & 0x0f;
135	switch (plx_ver) {
136	case PLX_9050:
137		outw(ioport + CY_PLX_9050_ICS,
138		    inw(ioport + CY_PLX_9050_ICS) | CY_PLX_9050_ICS_IENABLE |
139		    CY_PLX_9050_ICS_LOCAL_IENABLE);
140		break;
141	case PLX_9060:
142	case PLX_9080:
143	default:		/* Old board, use PLX_9060 values. */
144		outw(ioport + CY_PLX_9060_ICS,
145		    inw(ioport + CY_PLX_9060_ICS) | CY_PLX_9060_ICS_IENABLE |
146		    CY_PLX_9060_ICS_LOCAL_IENABLE);
147		break;
148	}
149
150	return;
151
152fail:
153	/* XXX should release any allocated virtual memory */
154	return;
155}
156
157#endif /* NPCI > 0 */
158