1 /* $OpenBSD: cy82c693.c,v 1.9 2024/05/24 06:02:53 jsg Exp $ */
2 /* $NetBSD: cy82c693.c,v 1.1 2000/06/06 03:07:39 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 2000 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Common routines to read/write control registers on the Cypress 82c693
35 * hyperCache(tm) Stand-Alone PCI Peripheral Controller with USB.
36 */
37
38 #include <sys/param.h>
39 #include <sys/device.h>
40 #include <sys/systm.h>
41
42 #include <machine/bus.h>
43
44 #include <dev/pci/cy82c693reg.h>
45 #include <dev/pci/cy82c693var.h>
46
47 static struct cy82c693_handle cyhc_handle;
48 static int cyhc_initialized;
49
50 const struct cy82c693_handle *
cy82c693_init(bus_space_tag_t iot)51 cy82c693_init(bus_space_tag_t iot)
52 {
53 bus_space_handle_t ioh;
54 int error;
55
56 if (cyhc_initialized) {
57 if (iot != cyhc_handle.cyhc_iot)
58 panic("cy82c693_init");
59 return (&cyhc_handle);
60 }
61
62 if ((error = bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh)) != 0) {
63 printf("cy82c693_init: bus_space_map failed (%d)", error);
64 return (NULL);
65 }
66
67 cyhc_handle.cyhc_iot = iot;
68 cyhc_handle.cyhc_ioh = ioh;
69
70 cyhc_initialized = 1;
71
72 return (&cyhc_handle);
73 }
74
75 u_int8_t
cy82c693_read(const struct cy82c693_handle * cyhc,int reg)76 cy82c693_read(const struct cy82c693_handle *cyhc, int reg)
77 {
78 u_int8_t rv;
79
80 if (cyhc_initialized == 0)
81 panic("cy82c693_read");
82
83 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
84 rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1);
85
86 return (rv);
87 }
88
89 void
cy82c693_write(const struct cy82c693_handle * cyhc,int reg,u_int8_t val)90 cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val)
91 {
92 if (cyhc_initialized == 0)
93 panic("cy82c693_write");
94
95 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg);
96 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val);
97 }
98