cy_pci.c revision 41771 
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 1.6 1997/09/02 20:06:24 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 <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <vm/vm.h>
41#include <vm/pmap.h>
42
43#include <pci/pcivar.h>
44
45#include <pci/cy_pcireg.h>
46
47static const char *cy_probe		__P((pcici_t, pcidi_t));
48static void cy_attach		__P((pcici_t, int));
49
50extern int cyattach_common(void *, int); /* Not exactly correct */
51extern void cyintr(int);
52
53static u_long cy_count;
54
55static struct pci_device cy_device = {
56        "cy",
57        cy_probe,
58        cy_attach,
59        &cy_count,
60        NULL
61};
62DATA_SET(pcidevice_set, cy_device);
63
64static const char *
65cy_probe(config_id, device_id)
66	pcici_t config_id;
67	pcidi_t device_id;
68{
69	if ((device_id & 0xffff) == CY_VENDORID_CYCLADES &&
70	    ((device_id >> 16) == CY_DEVICEID_CYCLOM_Y_1 ||
71	     (device_id >> 16) == CY_DEVICEID_CYCLOM_Y_2))
72		return ("Cyclades Cyclom-Y Serial Adapter");
73	return NULL;
74}
75
76static void
77cy_attach(config_id, unit)
78	pcici_t config_id;
79	int unit;
80{
81	vm_offset_t paddr;
82	void *vaddr;
83	u_int32_t ioport;
84	int adapter;
85
86	ioport = (u_int32_t) pci_conf_read(config_id, CY_PCI_BASE_ADDR1) & ~0x3;
87	paddr = pci_conf_read(config_id, CY_PCI_BASE_ADDR2) & ~0xf;
88#if 0
89	if (!pci_map_mem(config_id, CY_PCI_BASE_ADDR2, &vaddr, &paddr)) {
90		printf("cy%d: couldn't map shared memory\n", unit);
91		return;
92	};
93#endif
94	vaddr = pmap_mapdev(paddr, 0x4000);
95
96	adapter = cyattach_common(vaddr, 1);
97	if (adapter < 0) {
98		/*
99		 * No ports found. Release resources and punt.
100		 */
101		printf("cy%d: no ports found!", unit);
102		goto fail;
103	}
104
105	/*
106	 * Allocate our interrupt.
107	 * XXX	Using the ISA interrupt handler directly is a bit of a violation
108	 *	since it doesn't actually take the same argument. For PCI, the
109	 *	argument is a void * token, but for ISA it is a unit. Since
110	 *	there is no overlap in PCI/ISA unit numbers for this driver, and
111	 *	since the ISA driver must handle the interrupt anyway, we use
112	 *	the unit number as the token even for PCI.
113	 */
114	if (!pci_map_int(config_id, (pci_inthand_t *)cyintr, (void *)adapter, &tty_imask)) {
115		printf("cy%d: couldn't map interrupt\n", unit);
116		goto fail;
117	}
118	/*
119	 * Enable the "local" interrupt input to generate a
120	 * PCI interrupt.
121	 */
122	outw(ioport + CY_PLX_ICS, inw(ioport + CY_PLX_ICS) |
123	    CY_PLX_ICS_IENABLE | CY_PLX_ICS_LOCAL_IENABLE);
124
125	return;
126
127fail:
128	/* XXX should release any allocated virtual memory */
129	return;
130}
131
132#endif /* NPCI > 0 */
133