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 powernv_xscom_softc 54 { 55 56 }; 57 58 static int powernv_xscom_attach(device_t); 59 static int powernv_xscom_probe(device_t); 60 static const struct ofw_bus_devinfo * 61 powernv_xscom_get_devinfo(device_t, device_t); 62 63 static device_method_t powernv_xscom_methods[] = { 64 /* Device interface */ 65 DEVMETHOD(device_probe, powernv_xscom_probe), 66 DEVMETHOD(device_attach, powernv_xscom_attach), 67 68 /* ofw_bus interface */ 69 DEVMETHOD(ofw_bus_get_devinfo, powernv_xscom_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 powernv_xscom_probe(device_t dev) 81 { 82 83 if (!(ofw_bus_is_compatible(dev, "ibm,xscom"))) 84 return (ENXIO); 85 86 device_set_desc(dev, "xscom"); 87 return (0); 88 } 89 90 static int 91 powernv_xscom_attach(device_t dev) 92 { 93 phandle_t child; 94 device_t cdev; 95 struct ofw_bus_devinfo *dinfo; 96 97 for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 98 child = OF_peer(child)) { 99 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 100 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 101 free(dinfo, M_DEVBUF); 102 continue; 103 } 104 cdev = device_add_child(dev, NULL, -1); 105 if (cdev == NULL) { 106 device_printf(dev, "<%s>: device_add_child failed\n", 107 dinfo->obd_name); 108 ofw_bus_gen_destroy_devinfo(dinfo); 109 free(dinfo, M_DEVBUF); 110 continue; 111 } 112 device_set_ivars(cdev, dinfo); 113 } 114 115 return (bus_generic_attach(dev)); 116 } 117 118 static const struct ofw_bus_devinfo * 119 powernv_xscom_get_devinfo(device_t dev, device_t child) 120 { 121 return (device_get_ivars(child)); 122 } 123 124 DEFINE_CLASS_0(powernv_xscom, powernv_xscom_driver, powernv_xscom_methods, 125 sizeof(struct powernv_xscom_softc)); 126 DRIVER_MODULE(powernv_xscom, ofwbus, powernv_xscom_driver, NULL, NULL); 127