cy_pci.c revision 46335 
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 1.12 1999/04/24 20:13:58 peter 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/kernel.h>
42#include <vm/vm.h>
43#include <vm/pmap.h>
44
45#include <pci/pcivar.h>
46
47#include <pci/cy_pcireg.h>
48
49#ifdef CY_PCI_FASTINTR
50#include <i386/isa/intr_machdep.h>
51#endif
52
53static const char *cy_probe		__P((pcici_t, pcidi_t));
54static void cy_attach		__P((pcici_t, int));
55
56extern int cyattach_common(void *, int); /* Not exactly correct */
57extern void cyintr(int);
58
59static u_long cy_count;
60
61static struct pci_device cy_device = {
62        "cy",
63        cy_probe,
64        cy_attach,
65        &cy_count,
66        NULL
67};
68#ifdef COMPAT_PCI_DRIVER
69COMPAT_PCI_DRIVER(cy_pci, cy_device);
70#else
71DATA_SET(pcidevice_set, cy_device);
72#endif /* COMPAT_PCI_DRIVER */
73
74static const char *
75cy_probe(config_id, device_id)
76	pcici_t config_id;
77	pcidi_t device_id;
78{
79	if ((device_id & 0xffff) == CY_VENDORID_CYCLADES &&
80	    ((device_id >> 16) == CY_DEVICEID_CYCLOM_Y_1 ||
81	     (device_id >> 16) == CY_DEVICEID_CYCLOM_Y_2))
82		return ("Cyclades Cyclom-Y Serial Adapter");
83	return NULL;
84}
85
86static void
87cy_attach(config_id, unit)
88	pcici_t config_id;
89	int unit;
90{
91	vm_offset_t paddr;
92	void *vaddr;
93	u_int32_t ioport;
94	int adapter;
95	u_char plx_ver;
96
97	ioport = (u_int32_t) pci_conf_read(config_id, CY_PCI_BASE_ADDR1) & ~0x3;
98	paddr = pci_conf_read(config_id, CY_PCI_BASE_ADDR2) & ~0xf;
99#if 0
100	if (!pci_map_mem(config_id, CY_PCI_BASE_ADDR2, &vaddr, &paddr)) {
101		printf("cy%d: couldn't map shared memory\n", unit);
102		return;
103	};
104#endif
105	vaddr = pmap_mapdev(paddr, 0x4000);
106
107	adapter = cyattach_common(vaddr, 1);
108	if (adapter < 0) {
109		/*
110		 * No ports found. Release resources and punt.
111		 */
112		printf("cy%d: no ports found!\n", unit);
113		goto fail;
114	}
115
116	/*
117	 * Allocate our interrupt.
118	 * XXX	Using the ISA interrupt handler directly is a bit of a violation
119	 *	since it doesn't actually take the same argument. For PCI, the
120	 *	argument is a void * token, but for ISA it is a unit. Since
121	 *	there is no overlap in PCI/ISA unit numbers for this driver, and
122	 *	since the ISA driver must handle the interrupt anyway, we use
123	 *	the unit number as the token even for PCI.
124	 */
125	if (
126#ifdef CY_PCI_FASTINTR
127	    !pci_map_int_right(config_id, (pci_inthand_t *)cyintr,
128			       (void *)adapter, &tty_imask,
129			       INTR_EXCL | INTR_FAST) &&
130#endif
131	    !pci_map_int_right(config_id, (pci_inthand_t *)cyintr,
132			       (void *)adapter, &tty_imask, 0)) {
133		printf("cy%d: couldn't map interrupt\n", unit);
134		goto fail;
135	}
136
137	/*
138	 * Enable the "local" interrupt input to generate a
139	 * PCI interrupt.
140	 */
141	plx_ver = *((u_char *)vaddr + PLX_VER) & 0x0f;
142	switch (plx_ver) {
143	case PLX_9050:
144		outw(ioport + CY_PLX_9050_ICS,
145		    inw(ioport + CY_PLX_9050_ICS) | CY_PLX_9050_ICS_IENABLE |
146		    CY_PLX_9050_ICS_LOCAL_IENABLE);
147		break;
148	case PLX_9060:
149	case PLX_9080:
150	default:		/* Old board, use PLX_9060 values. */
151		outw(ioport + CY_PLX_9060_ICS,
152		    inw(ioport + CY_PLX_9060_ICS) | CY_PLX_9060_ICS_IENABLE |
153		    CY_PLX_9060_ICS_LOCAL_IENABLE);
154		break;
155	}
156
157	return;
158
159fail:
160	/* XXX should release any allocated virtual memory */
161	return;
162}
163
164#endif /* NPCI > 0 */
165