/*- * Copyright (c) 1998 Nicolas Souchu * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: smbus.c,v 1.1.1.2 1998/08/13 15:16:58 son Exp $ * */ #include #include #include #include #include #include #include /* * Autoconfiguration and support routines for the Philips serial I2C bus */ #define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev)) /* * structure used to attach devices to the I2C bus */ struct smbus_device { const char *smbd_name; /* device name */ const u_char smbd_addr; /* address of the device */ const char *smbd_desc; /* device descriptor */ }; /* * list of known devices */ struct smbus_device smbus_children[] = { { "smb", 0, "General Call" }, { NULL, 0 } }; static devclass_t smbus_devclass; /* * Device methods */ static int smbus_probe(device_t); static int smbus_attach(device_t); static void smbus_print_child(device_t, device_t); static int smbus_read_ivar(device_t , device_t, int, u_long *); static device_method_t smbus_methods[] = { /* device interface */ DEVMETHOD(device_probe, smbus_probe), DEVMETHOD(device_attach, smbus_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), /* bus interface */ DEVMETHOD(bus_print_child, smbus_print_child), DEVMETHOD(bus_read_ivar, smbus_read_ivar), DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), DEVMETHOD(bus_create_intr, bus_generic_create_intr), DEVMETHOD(bus_connect_intr, bus_generic_connect_intr), { 0, 0 } }; static driver_t smbus_driver = { "smbus", smbus_methods, DRIVER_TYPE_MISC, sizeof(struct smbus_softc), }; /* * At 'probe' time, we add all the devices which we know about to the * bus. The generic attach routine will probe and attach them if they * are alive. */ static int smbus_probe(device_t dev) { struct smbus_device *smbdev; device_t child; for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) { child = device_add_child(dev, smbdev->smbd_name, -1, smbdev); device_set_desc(child, smbdev->smbd_desc); } return (0); } static int smbus_attach(device_t dev) { struct smbus_softc *sc = device_get_softc(dev); device_t parent = device_get_parent(dev); printf("Probing for devices on the SMB bus:\n"); bus_generic_attach(dev); return (0); } void smbus_generic_intr(device_t dev, u_char devaddr, char low, char high) { return; } static void smbus_print_child(device_t bus, device_t dev) { struct smbus_device* smbdev = DEVTOSMBUS(dev); printf(" on %s%d addr 0x%x", device_get_name(bus), device_get_unit(bus), smbdev->smbd_addr); return; } static int smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result) { struct smbus_device* smbdev = DEVTOSMBUS(dev); switch (index) { case SMBUS_IVAR_ADDR: *result = smbdev->smbd_addr; break; } return (ENOENT); } DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0);