Annotation of sys/dev/i2c/i2c.c, Revision 1.1
1.1 ! nbrk 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: }
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