1 /* $OpenBSD: i2c.c,v 1.14 2006/02/26 20:24:46 deraadt Exp $ */ 2 /* $NetBSD: i2c.c,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 2003 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 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 for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * 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 WASABI SYSTEMS, INC 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 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/event.h> 43 #include <sys/conf.h> 44 45 #define _I2C_PRIVATE 46 #include <dev/i2c/i2cvar.h> 47 48 #define IICCF_ADDR 0 49 #define IICCF_SIZE 1 50 51 #include "ipmi.h" 52 53 struct iic_softc { 54 struct device sc_dev; 55 i2c_tag_t sc_tag; 56 }; 57 58 int iic_match(struct device *, void *, void *); 59 void iic_attach(struct device *, struct device *, void *); 60 int iic_search(struct device *, void *, void *); 61 62 struct cfattach iic_ca = { 63 sizeof (struct iic_softc), 64 iic_match, 65 iic_attach 66 }; 67 68 struct cfdriver iic_cd = { 69 NULL, "iic", DV_DULL 70 }; 71 72 int 73 iicbus_print(void *aux, const char *pnp) 74 { 75 struct i2cbus_attach_args *iba = aux; 76 77 if (pnp != NULL) 78 printf("%s at %s", iba->iba_name, pnp); 79 80 return (UNCONF); 81 } 82 83 int 84 iic_print(void *aux, const char *pnp) 85 { 86 struct i2c_attach_args *ia = aux; 87 88 if (pnp != NULL) 89 printf("\"%s\" at %s", ia->ia_name, pnp); 90 printf(" addr 0x%x", ia->ia_addr); 91 92 return (UNCONF); 93 } 94 95 int 96 iic_search(struct device *parent, void *arg, void *aux) 97 { 98 struct iic_softc *sc = (void *) parent; 99 struct cfdata *cf = arg; 100 struct i2c_attach_args ia; 101 102 if (cf->cf_loc[IICCF_ADDR] != -1) { 103 memset(&ia, 0, sizeof(ia)); 104 ia.ia_tag = sc->sc_tag; 105 ia.ia_addr = cf->cf_loc[IICCF_ADDR]; 106 ia.ia_size = cf->cf_loc[IICCF_SIZE]; 107 ia.ia_name = "unknown"; 108 109 if (cf->cf_attach->ca_match(parent, cf, &ia) > 0) 110 config_attach(parent, cf, &ia, iic_print); 111 } 112 return (0); 113 } 114 115 int 116 iic_match(struct device *parent, void *arg, void *aux) 117 { 118 struct cfdata *cf = arg; 119 struct i2cbus_attach_args *iba = aux; 120 121 /* Just make sure we're looking for i2c. */ 122 return (strcmp(iba->iba_name, cf->cf_driver->cd_name) == 0); 123 } 124 125 void 126 iic_attach(struct device *parent, struct device *self, void *aux) 127 { 128 struct iic_softc *sc = (void *) self; 129 struct i2cbus_attach_args *iba = aux; 130 131 sc->sc_tag = iba->iba_tag; 132 133 #if NIPMI > 0 134 extern int ipmi_enabled; 135 136 if (ipmi_enabled) { 137 printf(": disabled to avoid ipmi0 interactions\n"); 138 return; 139 } 140 #endif 141 142 printf("\n"); 143 144 /* 145 * Attach all i2c devices described in the kernel 146 * configuration file. 147 */ 148 config_search(iic_search, self, NULL); 149 150 /* 151 * Scan for known device signatures. 152 */ 153 if (iba->iba_bus_scan) 154 (iba->iba_bus_scan)(self, aux, iba->iba_bus_scan_arg); 155 else 156 iic_scan(self, aux); 157 } 158