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 * $FreeBSD$ 27 * 28 */ 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 35 #include <dev/smbus/smbconf.h> 36 #include <dev/smbus/smbus.h> 37 38 /* 39 * Autoconfiguration and support routines for the Philips serial I2C bus 40 */ 41 42 #define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev)) 43 44 /* 45 * structure used to attach devices to the I2C bus 46 */ 47 struct smbus_device { 48 const char *smbd_name; /* device name */ 49 const char *smbd_desc; /* device descriptor */ 50 }; 51 52 /* 53 * list of known devices 54 */ 55 struct smbus_device smbus_children[] = { 56 { "smb", "SMBus general purpose I/O" }, 57 { NULL, 0 } 58 }; 59 60 static devclass_t smbus_devclass; 61 62 /* 63 * Device methods 64 */ 65 static int smbus_probe(device_t); 66 static int smbus_attach(device_t); 67 68 #if 0 69 static int smbus_read_ivar(device_t , device_t, int, u_long *); 70 #endif 71 72 static device_method_t smbus_methods[] = { 73 /* device interface */ 74 DEVMETHOD(device_probe, smbus_probe), 75 DEVMETHOD(device_attach, smbus_attach), 76 DEVMETHOD(device_detach, bus_generic_detach), 77 DEVMETHOD(device_shutdown, bus_generic_shutdown), 78 79 /* bus interface */ 80 DEVMETHOD(bus_print_child, bus_generic_print_child), 81 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 82 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 83 84 { 0, 0 } 85 }; 86 87 static driver_t smbus_driver = { 88 "smbus", 89 smbus_methods, 90 sizeof(struct smbus_softc), 91 }; 92 93 /* 94 * At 'probe' time, we add all the devices which we know about to the 95 * bus. The generic attach routine will probe and attach them if they 96 * are alive. 97 */ 98 static int 99 smbus_probe(device_t dev) 100 { 101 device_set_desc(dev, "System Management Bus"); 102 103 return (0); 104 } 105 106 static int 107 smbus_attach(device_t dev) 108 { 109 struct smbus_device *smbdev; 110 111 /* add known devices */ 112 for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) { 113 device_t child; 114 115 if (devclass_find(smbdev->smbd_name)) { 116 child = device_add_child(dev, smbdev->smbd_name, -1); 117 device_set_ivars(child, smbdev); 118 device_set_desc(child, smbdev->smbd_desc); 119 } else if (bootverbose) 120 printf("smbus: %s devclass not found\n", 121 smbdev->smbd_name); 122 } 123 bus_generic_attach(dev); 124 125 return (0); 126 } 127 128 void 129 smbus_generic_intr(device_t dev, u_char devaddr, char low, char high) 130 { 131 return; 132 } 133 134 #if 0 135 static int 136 smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result) 137 { 138 struct smbus_device* smbdev = DEVTOSMBUS(dev); 139 140 switch (index) { 141 default: 142 break; 143 } 144 return (ENOENT); 145 } 146 #endif 147 148 DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0); 149 DRIVER_MODULE(smbus, bti2c, smbus_driver, smbus_devclass, 0, 0); 150 DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0); 151 DRIVER_MODULE(smbus, alsmb, smbus_driver, smbus_devclass, 0, 0); 152 DRIVER_MODULE(smbus, ichsmb, smbus_driver, smbus_devclass, 0, 0); 153