1 | /* $NetBSD: cy82c693.c,v 1.9 2014/03/20 06:48:54 skrll Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2000 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Common routines to read/write control registers on the Cypress 82c693 |
34 | * hyperCache(tm) Stand-Alone PCI Peripheral Controller with USB. |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: cy82c693.c,v 1.9 2014/03/20 06:48:54 skrll Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/device.h> |
42 | #include <sys/systm.h> |
43 | #include <sys/bus.h> |
44 | #include <sys/once.h> |
45 | |
46 | #include <dev/pci/pcireg.h> |
47 | #include <dev/pci/pcivar.h> |
48 | |
49 | #include <dev/pci/cy82c693reg.h> |
50 | #include <dev/pci/cy82c693var.h> |
51 | |
52 | ONCE_DECL(cyhc_once); |
53 | |
54 | static struct cy82c693_handle cyhc_handle; |
55 | static int cyhc_initialized; |
56 | |
57 | static kmutex_t cyhc_slock; |
58 | |
59 | static int |
60 | cy82c693_onceinit(void) |
61 | { |
62 | |
63 | mutex_init(&cyhc_slock, MUTEX_DEFAULT, IPL_HIGH); |
64 | |
65 | return 0; |
66 | } |
67 | |
68 | const struct cy82c693_handle * |
69 | cy82c693_init(bus_space_tag_t iot) |
70 | { |
71 | bus_space_handle_t ioh; |
72 | int err; |
73 | |
74 | err = RUN_ONCE(&cyhc_once, cy82c693_onceinit); |
75 | if (err) |
76 | return NULL; |
77 | |
78 | mutex_spin_enter(&cyhc_slock); |
79 | |
80 | if (cyhc_initialized) { |
81 | mutex_spin_exit(&cyhc_slock);; |
82 | KASSERT(bus_space_is_equal(iot, cyhc_handle.cyhc_iot)); |
83 | return &cyhc_handle; |
84 | } |
85 | |
86 | if (bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh) != 0) { |
87 | mutex_spin_exit(&cyhc_slock);; |
88 | return NULL; |
89 | } |
90 | |
91 | cyhc_handle.cyhc_iot = iot; |
92 | cyhc_handle.cyhc_ioh = ioh; |
93 | |
94 | cyhc_initialized = 1; |
95 | |
96 | mutex_spin_exit(&cyhc_slock);; |
97 | |
98 | return &cyhc_handle; |
99 | } |
100 | |
101 | u_int8_t |
102 | cy82c693_read(const struct cy82c693_handle *cyhc, int reg) |
103 | { |
104 | uint8_t rv; |
105 | |
106 | mutex_spin_enter(&cyhc_slock); |
107 | |
108 | if (cyhc_initialized == 0) { |
109 | mutex_spin_exit(&cyhc_slock);; |
110 | panic("cy82c693_read" ); |
111 | } |
112 | |
113 | bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg); |
114 | rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1); |
115 | |
116 | mutex_spin_exit(&cyhc_slock);; |
117 | |
118 | return rv; |
119 | } |
120 | |
121 | void |
122 | cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val) |
123 | { |
124 | |
125 | mutex_spin_enter(&cyhc_slock); |
126 | |
127 | if (cyhc_initialized == 0) { |
128 | mutex_spin_exit(&cyhc_slock);; |
129 | panic("cy82c693_write" ); |
130 | } |
131 | |
132 | bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg); |
133 | bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val); |
134 | |
135 | mutex_spin_exit(&cyhc_slock);; |
136 | } |
137 | |