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