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 28 #include "opt_platform.h" 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/conf.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/mbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/mutex.h> 43 #include <sys/rman.h> 44 #include <machine/bus.h> 45 46 #ifdef FDT 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 #endif 50 51 struct opal_i2cm_softc 52 { 53 54 }; 55 56 static int opal_i2cm_attach(device_t); 57 static int opal_i2cm_probe(device_t); 58 static const struct ofw_bus_devinfo * 59 opal_i2cm_get_devinfo(device_t, device_t); 60 61 static device_method_t opal_i2cm_methods[] = { 62 /* Device interface */ 63 DEVMETHOD(device_probe, opal_i2cm_probe), 64 DEVMETHOD(device_attach, opal_i2cm_attach), 65 66 /* ofw_bus interface */ 67 DEVMETHOD(ofw_bus_get_devinfo, opal_i2cm_get_devinfo), 68 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 69 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 70 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 71 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 72 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 73 74 DEVMETHOD_END 75 }; 76 77 static int 78 opal_i2cm_probe(device_t dev) 79 { 80 81 if (!(ofw_bus_is_compatible(dev, "ibm,centaur-i2cm") || 82 ofw_bus_is_compatible(dev, "ibm,power8-i2cm"))) 83 return (ENXIO); 84 85 device_set_desc(dev, "centaur-i2cm"); 86 return (0); 87 } 88 89 static int 90 opal_i2cm_attach(device_t dev) 91 { 92 phandle_t child; 93 device_t cdev; 94 struct ofw_bus_devinfo *dinfo; 95 96 for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 97 child = OF_peer(child)) { 98 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 99 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 100 free(dinfo, M_DEVBUF); 101 continue; 102 } 103 cdev = device_add_child(dev, NULL, -1); 104 if (cdev == NULL) { 105 device_printf(dev, "<%s>: device_add_child failed\n", 106 dinfo->obd_name); 107 ofw_bus_gen_destroy_devinfo(dinfo); 108 free(dinfo, M_DEVBUF); 109 continue; 110 } 111 device_set_ivars(cdev, dinfo); 112 } 113 114 return (bus_generic_attach(dev)); 115 } 116 117 static const struct ofw_bus_devinfo * 118 opal_i2cm_get_devinfo(device_t dev, device_t child) 119 { 120 return (device_get_ivars(child)); 121 } 122 123 DEFINE_CLASS_0(opal_i2cm, opal_i2cm_driver, opal_i2cm_methods, 124 sizeof(struct opal_i2cm_softc)); 125 DRIVER_MODULE(opal_i2cm, powernv_xscom, opal_i2cm_driver, NULL, NULL); 126 DRIVER_MODULE(opal_i2cm, powernv_centaur, opal_i2cm_driver, NULL, NULL); 127