1 /* $NetBSD: cy82c693.c,v 1.5 2008/01/04 21:18:01 ad 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Common routines to read/write control registers on the Cypress 82c693 41 * hyperCache(tm) Stand-Alone PCI Peripheral Controller with USB. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: cy82c693.c,v 1.5 2008/01/04 21:18:01 ad Exp $"); 46 47 #include "opt_multiprocessor.h" 48 #include "opt_lockdebug.h" 49 50 #include <sys/param.h> 51 #include <sys/device.h> 52 #include <sys/systm.h> 53 #include <sys/bus.h> 54 #include <sys/simplelock.h> 55 56 #include <dev/pci/pcireg.h> 57 #include <dev/pci/pcivar.h> 58 59 #include <dev/pci/cy82c693reg.h> 60 #include <dev/pci/cy82c693var.h> 61 62 static struct cy82c693_handle cyhc_handle; 63 static int cyhc_initialized; 64 65 static struct simplelock cyhc_slock = SIMPLELOCK_INITIALIZER; 66 67 #define CYHC_LOCK(s) \ 68 do { \ 69 s = splhigh(); \ 70 simple_lock(&cyhc_slock); \ 71 } while (0) 72 73 #define CYHC_UNLOCK(s) \ 74 do { \ 75 simple_unlock(&cyhc_slock); \ 76 splx(s); \ 77 } while (0) 78 79 const struct cy82c693_handle * 80 cy82c693_init(bus_space_tag_t iot) 81 { 82 bus_space_handle_t ioh; 83 int s; 84 85 CYHC_LOCK(s); 86 87 if (cyhc_initialized) { 88 CYHC_UNLOCK(s); 89 if (iot != cyhc_handle.cyhc_iot) 90 panic("cy82c693_init"); 91 return (&cyhc_handle); 92 } 93 94 if (bus_space_map(iot, CYHC_CONFIG_ADDR, 2, 0, &ioh) != 0) { 95 CYHC_UNLOCK(s); 96 return (NULL); 97 } 98 99 cyhc_handle.cyhc_iot = iot; 100 cyhc_handle.cyhc_ioh = ioh; 101 102 cyhc_initialized = 1; 103 104 CYHC_UNLOCK(s); 105 106 return (&cyhc_handle); 107 } 108 109 u_int8_t 110 cy82c693_read(const struct cy82c693_handle *cyhc, int reg) 111 { 112 int s; 113 u_int8_t rv; 114 115 CYHC_LOCK(s); 116 117 if (cyhc_initialized == 0) { 118 CYHC_UNLOCK(s); 119 panic("cy82c693_read"); 120 } 121 122 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg); 123 rv = bus_space_read_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1); 124 125 CYHC_UNLOCK(s); 126 127 return (rv); 128 } 129 130 void 131 cy82c693_write(const struct cy82c693_handle *cyhc, int reg, u_int8_t val) 132 { 133 int s; 134 135 CYHC_LOCK(s); 136 137 if (cyhc_initialized == 0) { 138 CYHC_UNLOCK(s); 139 panic("cy82c693_write"); 140 } 141 142 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 0, reg); 143 bus_space_write_1(cyhc->cyhc_iot, cyhc->cyhc_ioh, 1, val); 144 145 CYHC_UNLOCK(s); 146 } 147