1 /*- 2 * Copyright (c) 1998 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/smbus/smbus.c,v 1.12.2.3 2002/04/19 05:52:12 nsouch Exp $ 27 * $DragonFly: src/sys/bus/smbus/smbus.c,v 1.4 2006/12/22 23:12:17 swildner Exp $ 28 * 29 */ 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 36 #include "smbconf.h" 37 #include "smbus.h" 38 39 /* 40 * Autoconfiguration and support routines for the Philips serial I2C bus 41 */ 42 43 #define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev)) 44 45 /* 46 * structure used to attach devices to the I2C bus 47 */ 48 struct smbus_device { 49 const char *smbd_name; /* device name */ 50 const char *smbd_desc; /* device descriptor */ 51 }; 52 53 /* 54 * list of known devices 55 */ 56 struct smbus_device smbus_children[] = { 57 { "smb", "SMBus general purpose I/O" }, 58 { NULL, 0 } 59 }; 60 61 static devclass_t smbus_devclass; 62 63 /* 64 * Device methods 65 */ 66 static int smbus_probe(device_t); 67 static int smbus_attach(device_t); 68 69 #if 0 70 static int smbus_read_ivar(device_t , device_t, int, u_long *); 71 #endif 72 73 static device_method_t smbus_methods[] = { 74 /* device interface */ 75 DEVMETHOD(device_probe, smbus_probe), 76 DEVMETHOD(device_attach, smbus_attach), 77 DEVMETHOD(device_detach, bus_generic_detach), 78 DEVMETHOD(device_shutdown, bus_generic_shutdown), 79 80 /* bus interface */ 81 DEVMETHOD(bus_print_child, bus_generic_print_child), 82 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 83 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 84 85 { 0, 0 } 86 }; 87 88 static driver_t smbus_driver = { 89 "smbus", 90 smbus_methods, 91 sizeof(struct smbus_softc), 92 }; 93 94 /* 95 * At 'probe' time, we add all the devices which we know about to the 96 * bus. The generic attach routine will probe and attach them if they 97 * are alive. 98 */ 99 static int 100 smbus_probe(device_t dev) 101 { 102 device_set_desc(dev, "System Management Bus"); 103 104 return (0); 105 } 106 107 static int 108 smbus_attach(device_t dev) 109 { 110 struct smbus_device *smbdev; 111 112 /* add known devices */ 113 for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) { 114 device_t child; 115 116 if (devclass_find(smbdev->smbd_name)) { 117 child = device_add_child(dev, smbdev->smbd_name, -1); 118 device_set_ivars(child, smbdev); 119 device_set_desc(child, smbdev->smbd_desc); 120 } else if (bootverbose) 121 kprintf("smbus: %s devclass not found\n", 122 smbdev->smbd_name); 123 } 124 bus_generic_attach(dev); 125 126 return (0); 127 } 128 129 void 130 smbus_generic_intr(device_t dev, u_char devaddr, char low, char high) 131 { 132 return; 133 } 134 135 #if 0 136 static int 137 smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result) 138 { 139 struct smbus_device* smbdev = DEVTOSMBUS(dev); 140 141 switch (index) { 142 default: 143 break; 144 } 145 return (ENOENT); 146 } 147 #endif 148 149 DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0); 150 DRIVER_MODULE(smbus, bti2c, smbus_driver, smbus_devclass, 0, 0); 151 DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0); 152 DRIVER_MODULE(smbus, alsmb, smbus_driver, smbus_devclass, 0, 0); 153 DRIVER_MODULE(smbus, ichsmb, smbus_driver, smbus_devclass, 0, 0); 154 DRIVER_MODULE(smbus, amdsmb, smbus_driver, smbus_devclass, 0, 0); 155 DRIVER_MODULE(smbus, viapropm, smbus_driver, smbus_devclass, 0, 0); 156