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