1 /* $NetBSD: i2c.c,v 1.7 2006/03/29 06:41:24 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/event.h> 42 #include <sys/conf.h> 43 44 #include <dev/i2c/i2cvar.h> 45 46 #include "locators.h" 47 48 struct iic_softc { 49 struct device sc_dev; 50 i2c_tag_t sc_tag; 51 int sc_type; 52 }; 53 54 int 55 iicbus_print(void *aux, const char *pnp) 56 { 57 struct i2cbus_attach_args *iba = aux; 58 59 if (pnp != NULL) 60 aprint_normal("%s at %s", iba->iba_name, pnp); 61 62 return (UNCONF); 63 } 64 65 static int 66 iic_print(void *aux, const char *pnp) 67 { 68 struct i2c_attach_args *ia = aux; 69 70 if (ia->ia_addr != (i2c_addr_t)-1) 71 aprint_normal(" addr 0x%x", ia->ia_addr); 72 73 return (UNCONF); 74 } 75 76 static int 77 iic_search(struct device *parent, struct cfdata *cf, 78 const int *ldesc, void *aux) 79 { 80 struct iic_softc *sc = (void *) parent; 81 struct i2c_attach_args ia; 82 83 ia.ia_tag = sc->sc_tag; 84 ia.ia_addr = cf->cf_loc[IICCF_ADDR]; 85 ia.ia_size = cf->cf_loc[IICCF_SIZE]; 86 ia.ia_type = sc->sc_type; 87 88 if (config_match(parent, cf, &ia) > 0) 89 config_attach(parent, cf, &ia, iic_print); 90 91 return (0); 92 } 93 94 static int 95 iic_match(struct device *parent, struct cfdata *cf, void *aux) 96 { 97 struct i2cbus_attach_args *iba = aux; 98 99 /* Just make sure we're looking for i2c. */ 100 return (strcmp(iba->iba_name, cf->cf_name) == 0); 101 } 102 103 static void 104 iic_attach(struct device *parent, struct device *self, void *aux) 105 { 106 struct iic_softc *sc = device_private(self); 107 struct i2cbus_attach_args *iba = aux; 108 109 aprint_naive(": I2C bus\n"); 110 aprint_normal(": I2C bus\n"); 111 112 sc->sc_tag = iba->iba_tag; 113 sc->sc_type = iba->iba_type; 114 115 /* 116 * Attach all i2c devices described in the kernel 117 * configuration file. 118 */ 119 config_search_ia(iic_search, self, "iic", NULL); 120 } 121 122 CFATTACH_DECL(iic, sizeof(struct iic_softc), 123 iic_match, iic_attach, NULL, NULL); 124