1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright 2003 by Peter Grehan. 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/kernel.h> 37 38 #include <dev/ofw/ofw_bus.h> 39 #include <dev/ofw/ofw_bus_subr.h> 40 #include <dev/ofw/openfirm.h> 41 42 #include <machine/bus.h> 43 #include <machine/intr_machdep.h> 44 #include <machine/md_var.h> 45 #include <machine/pio.h> 46 #include <machine/resource.h> 47 48 #include <vm/vm.h> 49 #include <vm/pmap.h> 50 51 #include <sys/rman.h> 52 53 #include <machine/openpicreg.h> 54 #include <machine/openpicvar.h> 55 56 #include "pic_if.h" 57 58 /* 59 * OFW interface 60 */ 61 static int openpic_ofw_probe(device_t); 62 static int openpic_ofw_attach(device_t); 63 64 static void openpic_ofw_translate_code(device_t, u_int irq, int code, 65 enum intr_trigger *trig, enum intr_polarity *pol); 66 67 static device_method_t openpic_ofw_methods[] = { 68 /* Device interface */ 69 DEVMETHOD(device_probe, openpic_ofw_probe), 70 DEVMETHOD(device_attach, openpic_ofw_attach), 71 72 /* PIC interface */ 73 DEVMETHOD(pic_translate_code, openpic_ofw_translate_code), 74 75 DEVMETHOD_END 76 }; 77 78 DEFINE_CLASS_1(openpic, openpic_ofw_driver, openpic_ofw_methods, 79 sizeof(struct openpic_softc), openpic_class); 80 81 EARLY_DRIVER_MODULE(openpic, ofwbus, openpic_ofw_driver, 0, 0, 82 BUS_PASS_INTERRUPT); 83 EARLY_DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, 0, 0, 84 BUS_PASS_INTERRUPT); 85 EARLY_DRIVER_MODULE(openpic, macio, openpic_ofw_driver, 0, 0, 86 BUS_PASS_INTERRUPT); 87 88 static int 89 openpic_ofw_probe(device_t dev) 90 { 91 const char *type = ofw_bus_get_type(dev); 92 93 if (type == NULL) 94 return (ENXIO); 95 96 if (!ofw_bus_is_compatible(dev, "chrp,open-pic") && 97 strcmp(type, "open-pic") != 0) 98 return (ENXIO); 99 100 /* 101 * On some U4 systems, there is a phantom MPIC in the mac-io cell. 102 * The uninorth driver will pick up the real PIC, so ignore it here. 103 */ 104 if (OF_finddevice("/u4") != (phandle_t)-1) 105 return (ENXIO); 106 107 device_set_desc(dev, OPENPIC_DEVSTR); 108 return (0); 109 } 110 111 static int 112 openpic_ofw_attach(device_t dev) 113 { 114 struct openpic_softc *sc; 115 phandle_t xref, node; 116 117 node = ofw_bus_get_node(dev); 118 sc = device_get_softc(dev); 119 120 if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1 && 121 OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 && 122 OF_getencprop(node, "linux,phandle", &xref, sizeof(xref)) == -1) 123 xref = node; 124 125 if (ofw_bus_is_compatible(dev, "fsl,mpic")) { 126 sc->sc_quirks = OPENPIC_QUIRK_SINGLE_BIND; 127 sc->sc_quirks |= OPENPIC_QUIRK_HIDDEN_IRQS; 128 } 129 130 return (openpic_common_attach(dev, xref)); 131 } 132 133 static void 134 openpic_ofw_translate_code(device_t dev, u_int irq, int code, 135 enum intr_trigger *trig, enum intr_polarity *pol) 136 { 137 switch (code) { 138 case 0: 139 /* L to H edge */ 140 *trig = INTR_TRIGGER_EDGE; 141 *pol = INTR_POLARITY_HIGH; 142 break; 143 case 1: 144 /* Active L level */ 145 *trig = INTR_TRIGGER_LEVEL; 146 *pol = INTR_POLARITY_LOW; 147 break; 148 case 2: 149 /* Active H level */ 150 *trig = INTR_TRIGGER_LEVEL; 151 *pol = INTR_POLARITY_HIGH; 152 break; 153 case 3: 154 /* H to L edge */ 155 *trig = INTR_TRIGGER_EDGE; 156 *pol = INTR_POLARITY_LOW; 157 break; 158 default: 159 *trig = INTR_TRIGGER_CONFORM; 160 *pol = INTR_POLARITY_CONFORM; 161 } 162 } 163