1 /*- 2 * Copyright (c) 2017-2018 QCM Technologies. 3 * Copyright (c) 2017-2018 Semihalf. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include "opt_platform.h" 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/mbuf.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 #include <sys/mutex.h> 45 #include <sys/rman.h> 46 #include <machine/bus.h> 47 48 #ifdef FDT 49 #include <dev/ofw/ofw_bus.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 #endif 52 53 struct opal_i2cm_softc 54 { 55 56 }; 57 58 static int opal_i2cm_attach(device_t); 59 static int opal_i2cm_probe(device_t); 60 static const struct ofw_bus_devinfo * 61 opal_i2cm_get_devinfo(device_t, device_t); 62 63 static device_method_t opal_i2cm_methods[] = { 64 /* Device interface */ 65 DEVMETHOD(device_probe, opal_i2cm_probe), 66 DEVMETHOD(device_attach, opal_i2cm_attach), 67 68 /* ofw_bus interface */ 69 DEVMETHOD(ofw_bus_get_devinfo, opal_i2cm_get_devinfo), 70 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 71 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 72 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 73 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 74 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 75 76 DEVMETHOD_END 77 }; 78 79 static int 80 opal_i2cm_probe(device_t dev) 81 { 82 83 if (!(ofw_bus_is_compatible(dev, "ibm,centaur-i2cm") || 84 ofw_bus_is_compatible(dev, "ibm,power8-i2cm"))) 85 return (ENXIO); 86 87 device_set_desc(dev, "centaur-i2cm"); 88 return (0); 89 } 90 91 static int 92 opal_i2cm_attach(device_t dev) 93 { 94 phandle_t child; 95 device_t cdev; 96 struct ofw_bus_devinfo *dinfo; 97 98 for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 99 child = OF_peer(child)) { 100 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 101 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 102 free(dinfo, M_DEVBUF); 103 continue; 104 } 105 cdev = device_add_child(dev, NULL, -1); 106 if (cdev == NULL) { 107 device_printf(dev, "<%s>: device_add_child failed\n", 108 dinfo->obd_name); 109 ofw_bus_gen_destroy_devinfo(dinfo); 110 free(dinfo, M_DEVBUF); 111 continue; 112 } 113 device_set_ivars(cdev, dinfo); 114 } 115 116 return (bus_generic_attach(dev)); 117 } 118 119 static const struct ofw_bus_devinfo * 120 opal_i2cm_get_devinfo(device_t dev, device_t child) 121 { 122 return (device_get_ivars(child)); 123 } 124 125 DEFINE_CLASS_0(opal_i2cm, opal_i2cm_driver, opal_i2cm_methods, 126 sizeof(struct opal_i2cm_softc)); 127 DRIVER_MODULE(opal_i2cm, powernv_xscom, opal_i2cm_driver, NULL, NULL); 128 DRIVER_MODULE(opal_i2cm, powernv_centaur, opal_i2cm_driver, NULL, NULL); 129