1d70424edSNicolas Souchu /*- 2d70424edSNicolas Souchu * Copyright (c) 1998 Nicolas Souchu 3d70424edSNicolas Souchu * All rights reserved. 4d70424edSNicolas Souchu * 5d70424edSNicolas Souchu * Redistribution and use in source and binary forms, with or without 6d70424edSNicolas Souchu * modification, are permitted provided that the following conditions 7d70424edSNicolas Souchu * are met: 8d70424edSNicolas Souchu * 1. Redistributions of source code must retain the above copyright 9d70424edSNicolas Souchu * notice, this list of conditions and the following disclaimer. 10d70424edSNicolas Souchu * 2. Redistributions in binary form must reproduce the above copyright 11d70424edSNicolas Souchu * notice, this list of conditions and the following disclaimer in the 12d70424edSNicolas Souchu * documentation and/or other materials provided with the distribution. 13d70424edSNicolas Souchu * 14d70424edSNicolas Souchu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15d70424edSNicolas Souchu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16d70424edSNicolas Souchu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17d70424edSNicolas Souchu * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18d70424edSNicolas Souchu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19d70424edSNicolas Souchu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20d70424edSNicolas Souchu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21d70424edSNicolas Souchu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22d70424edSNicolas Souchu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23d70424edSNicolas Souchu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24d70424edSNicolas Souchu * SUCH DAMAGE. 25d70424edSNicolas Souchu * 26517e2485SNicolas Souchu * $Id: smbus.c,v 1.5 1998/12/10 02:31:08 archie Exp $ 27d70424edSNicolas Souchu * 28d70424edSNicolas Souchu */ 29d70424edSNicolas Souchu #include <sys/param.h> 30d70424edSNicolas Souchu #include <sys/systm.h> 31d70424edSNicolas Souchu #include <sys/kernel.h> 32d70424edSNicolas Souchu #include <sys/module.h> 33d70424edSNicolas Souchu #include <sys/bus.h> 34d70424edSNicolas Souchu 35d70424edSNicolas Souchu #include <dev/smbus/smbconf.h> 36d70424edSNicolas Souchu #include <dev/smbus/smbus.h> 37d70424edSNicolas Souchu 38d70424edSNicolas Souchu /* 39d70424edSNicolas Souchu * Autoconfiguration and support routines for the Philips serial I2C bus 40d70424edSNicolas Souchu */ 41d70424edSNicolas Souchu 42d70424edSNicolas Souchu #define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev)) 43d70424edSNicolas Souchu 44d70424edSNicolas Souchu /* 45d70424edSNicolas Souchu * structure used to attach devices to the I2C bus 46d70424edSNicolas Souchu */ 47d70424edSNicolas Souchu struct smbus_device { 48d70424edSNicolas Souchu const char *smbd_name; /* device name */ 49d70424edSNicolas Souchu const char *smbd_desc; /* device descriptor */ 50d70424edSNicolas Souchu }; 51d70424edSNicolas Souchu 52d70424edSNicolas Souchu /* 53d70424edSNicolas Souchu * list of known devices 54d70424edSNicolas Souchu */ 55d70424edSNicolas Souchu struct smbus_device smbus_children[] = { 56517e2485SNicolas Souchu { "smb", "SMBus general purpose I/O" }, 57d70424edSNicolas Souchu { NULL, 0 } 58d70424edSNicolas Souchu }; 59d70424edSNicolas Souchu 60d70424edSNicolas Souchu static devclass_t smbus_devclass; 61d70424edSNicolas Souchu 62d70424edSNicolas Souchu /* 63d70424edSNicolas Souchu * Device methods 64d70424edSNicolas Souchu */ 65d70424edSNicolas Souchu static int smbus_probe(device_t); 66d70424edSNicolas Souchu static int smbus_attach(device_t); 67d70424edSNicolas Souchu static void smbus_print_child(device_t, device_t); 68517e2485SNicolas Souchu 69517e2485SNicolas Souchu #if 0 70d70424edSNicolas Souchu static int smbus_read_ivar(device_t , device_t, int, u_long *); 71517e2485SNicolas Souchu #endif 72d70424edSNicolas Souchu 73d70424edSNicolas Souchu static device_method_t smbus_methods[] = { 74d70424edSNicolas Souchu /* device interface */ 75d70424edSNicolas Souchu DEVMETHOD(device_probe, smbus_probe), 76d70424edSNicolas Souchu DEVMETHOD(device_attach, smbus_attach), 77d70424edSNicolas Souchu DEVMETHOD(device_detach, bus_generic_detach), 78d70424edSNicolas Souchu DEVMETHOD(device_shutdown, bus_generic_shutdown), 79d70424edSNicolas Souchu 80d70424edSNicolas Souchu /* bus interface */ 81d70424edSNicolas Souchu DEVMETHOD(bus_print_child, smbus_print_child), 82517e2485SNicolas Souchu DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 83d70424edSNicolas Souchu DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 84d70424edSNicolas Souchu 85d70424edSNicolas Souchu { 0, 0 } 86d70424edSNicolas Souchu }; 87d70424edSNicolas Souchu 88d70424edSNicolas Souchu static driver_t smbus_driver = { 89d70424edSNicolas Souchu "smbus", 90d70424edSNicolas Souchu smbus_methods, 91d70424edSNicolas Souchu DRIVER_TYPE_MISC, 92d70424edSNicolas Souchu sizeof(struct smbus_softc), 93d70424edSNicolas Souchu }; 94d70424edSNicolas Souchu 95d70424edSNicolas Souchu /* 96d70424edSNicolas Souchu * At 'probe' time, we add all the devices which we know about to the 97d70424edSNicolas Souchu * bus. The generic attach routine will probe and attach them if they 98d70424edSNicolas Souchu * are alive. 99d70424edSNicolas Souchu */ 100d70424edSNicolas Souchu static int 101d70424edSNicolas Souchu smbus_probe(device_t dev) 102d70424edSNicolas Souchu { 1033ab1f056SNicolas Souchu device_set_desc(dev, "System Management Bus"); 104517e2485SNicolas Souchu 105d70424edSNicolas Souchu return (0); 106d70424edSNicolas Souchu } 107d70424edSNicolas Souchu 108d70424edSNicolas Souchu static int 109d70424edSNicolas Souchu smbus_attach(device_t dev) 110d70424edSNicolas Souchu { 111f1d19042SArchie Cobbs struct smbus_device *smbdev; 112d70424edSNicolas Souchu 113517e2485SNicolas Souchu /* add known devices */ 1143ab1f056SNicolas Souchu for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) { 115e43f5ffbSArchie Cobbs device_t child; 1163ab1f056SNicolas Souchu 117517e2485SNicolas Souchu if (devclass_find(smbdev->smbd_name)) { 118517e2485SNicolas Souchu child = device_add_child(dev, smbdev->smbd_name, 119517e2485SNicolas Souchu -1, smbdev); 1203ab1f056SNicolas Souchu device_set_desc(child, smbdev->smbd_desc); 121517e2485SNicolas Souchu } else if (bootverbose) 122517e2485SNicolas Souchu printf("smbus: %s devclass not found\n", 123517e2485SNicolas Souchu smbdev->smbd_name); 1243ab1f056SNicolas Souchu } 125517e2485SNicolas Souchu bus_generic_attach(dev); 1263ab1f056SNicolas Souchu 127d70424edSNicolas Souchu return (0); 128d70424edSNicolas Souchu } 129d70424edSNicolas Souchu 130d70424edSNicolas Souchu void 131d70424edSNicolas Souchu smbus_generic_intr(device_t dev, u_char devaddr, char low, char high) 132d70424edSNicolas Souchu { 133d70424edSNicolas Souchu return; 134d70424edSNicolas Souchu } 135d70424edSNicolas Souchu 136d70424edSNicolas Souchu static void 137d70424edSNicolas Souchu smbus_print_child(device_t bus, device_t dev) 138d70424edSNicolas Souchu { 139d70424edSNicolas Souchu 140517e2485SNicolas Souchu printf(" on %s%d", device_get_name(bus), device_get_unit(bus)); 141d70424edSNicolas Souchu 142d70424edSNicolas Souchu return; 143d70424edSNicolas Souchu } 144d70424edSNicolas Souchu 145517e2485SNicolas Souchu #if 0 146d70424edSNicolas Souchu static int 147d70424edSNicolas Souchu smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result) 148d70424edSNicolas Souchu { 149d70424edSNicolas Souchu struct smbus_device* smbdev = DEVTOSMBUS(dev); 150d70424edSNicolas Souchu 151d70424edSNicolas Souchu switch (index) { 152517e2485SNicolas Souchu default: 153d70424edSNicolas Souchu break; 154d70424edSNicolas Souchu } 155d70424edSNicolas Souchu return (ENOENT); 156d70424edSNicolas Souchu } 157517e2485SNicolas Souchu #endif 158d70424edSNicolas Souchu 159d70424edSNicolas Souchu DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0); 1603ab1f056SNicolas Souchu DRIVER_MODULE(smbus, bti2c, smbus_driver, smbus_devclass, 0, 0); 161517e2485SNicolas Souchu DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0); 162