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 DEVMETHOD(device_suspend, openpic_suspend), 72 DEVMETHOD(device_resume, openpic_resume), 73 74 /* PIC interface */ 75 DEVMETHOD(pic_bind, openpic_bind), 76 DEVMETHOD(pic_config, openpic_config), 77 DEVMETHOD(pic_dispatch, openpic_dispatch), 78 DEVMETHOD(pic_enable, openpic_enable), 79 DEVMETHOD(pic_eoi, openpic_eoi), 80 DEVMETHOD(pic_ipi, openpic_ipi), 81 DEVMETHOD(pic_mask, openpic_mask), 82 DEVMETHOD(pic_unmask, openpic_unmask), 83 84 DEVMETHOD(pic_translate_code, openpic_ofw_translate_code), 85 86 DEVMETHOD_END 87 }; 88 89 static driver_t openpic_ofw_driver = { 90 "openpic", 91 openpic_ofw_methods, 92 sizeof(struct openpic_softc), 93 }; 94 95 EARLY_DRIVER_MODULE(openpic, ofwbus, openpic_ofw_driver, 0, 0, 96 BUS_PASS_INTERRUPT); 97 EARLY_DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, 0, 0, 98 BUS_PASS_INTERRUPT); 99 EARLY_DRIVER_MODULE(openpic, macio, openpic_ofw_driver, 0, 0, 100 BUS_PASS_INTERRUPT); 101 102 static int 103 openpic_ofw_probe(device_t dev) 104 { 105 const char *type = ofw_bus_get_type(dev); 106 107 if (type == NULL) 108 return (ENXIO); 109 110 if (!ofw_bus_is_compatible(dev, "chrp,open-pic") && 111 strcmp(type, "open-pic") != 0) 112 return (ENXIO); 113 114 /* 115 * On some U4 systems, there is a phantom MPIC in the mac-io cell. 116 * The uninorth driver will pick up the real PIC, so ignore it here. 117 */ 118 if (OF_finddevice("/u4") != (phandle_t)-1) 119 return (ENXIO); 120 121 device_set_desc(dev, OPENPIC_DEVSTR); 122 return (0); 123 } 124 125 static int 126 openpic_ofw_attach(device_t dev) 127 { 128 struct openpic_softc *sc; 129 phandle_t xref, node; 130 131 node = ofw_bus_get_node(dev); 132 sc = device_get_softc(dev); 133 134 if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1 && 135 OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 && 136 OF_getencprop(node, "linux,phandle", &xref, sizeof(xref)) == -1) 137 xref = node; 138 139 if (ofw_bus_is_compatible(dev, "fsl,mpic")) { 140 sc->sc_quirks = OPENPIC_QUIRK_SINGLE_BIND; 141 sc->sc_quirks |= OPENPIC_QUIRK_HIDDEN_IRQS; 142 } 143 144 return (openpic_common_attach(dev, xref)); 145 } 146 147 static void 148 openpic_ofw_translate_code(device_t dev, u_int irq, int code, 149 enum intr_trigger *trig, enum intr_polarity *pol) 150 { 151 switch (code) { 152 case 0: 153 /* L to H edge */ 154 *trig = INTR_TRIGGER_EDGE; 155 *pol = INTR_POLARITY_HIGH; 156 break; 157 case 1: 158 /* Active L level */ 159 *trig = INTR_TRIGGER_LEVEL; 160 *pol = INTR_POLARITY_LOW; 161 break; 162 case 2: 163 /* Active H level */ 164 *trig = INTR_TRIGGER_LEVEL; 165 *pol = INTR_POLARITY_HIGH; 166 break; 167 case 3: 168 /* H to L edge */ 169 *trig = INTR_TRIGGER_EDGE; 170 *pol = INTR_POLARITY_LOW; 171 break; 172 default: 173 *trig = INTR_TRIGGER_CONFORM; 174 *pol = INTR_POLARITY_CONFORM; 175 } 176 } 177