1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * Altera PIO (Parallel IO) device driver 33 */ 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/bus.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <sys/malloc.h> 42 #include <sys/rman.h> 43 #include <sys/timeet.h> 44 #include <sys/timetc.h> 45 46 #include <dev/fdt/fdt_common.h> 47 #include <dev/ofw/openfirm.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 51 #include <machine/bus.h> 52 #include <machine/fdt.h> 53 #include <machine/cpu.h> 54 55 #include <dev/altera/pio/pio.h> 56 #include "pio_if.h" 57 58 #define READ4(_sc, _reg) bus_read_4((_sc)->res[0], _reg) 59 #define READ2(_sc, _reg) bus_read_2((_sc)->res[0], _reg) 60 #define READ1(_sc, _reg) bus_read_1((_sc)->res[0], _reg) 61 #define WRITE4(_sc, _reg, _val) bus_write_4((_sc)->res[0], _reg, _val) 62 #define WRITE2(_sc, _reg, _val) bus_write_2((_sc)->res[0], _reg, _val) 63 #define WRITE1(_sc, _reg, _val) bus_write_1((_sc)->res[0], _reg, _val) 64 65 struct pio_softc { 66 struct resource *res[2]; 67 bus_space_tag_t bst; 68 bus_space_handle_t bsh; 69 device_t dev; 70 void *ih; 71 }; 72 73 static struct resource_spec pio_spec[] = { 74 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 75 { SYS_RES_IRQ, 0, RF_ACTIVE }, 76 { -1, 0 } 77 }; 78 79 static int 80 pio_setup_irq(device_t dev, void *intr_handler, void *ih_user) 81 { 82 struct pio_softc *sc; 83 84 sc = device_get_softc(dev); 85 86 /* Setup interrupt handlers */ 87 if (bus_setup_intr(sc->dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE, 88 NULL, intr_handler, ih_user, &sc->ih)) { 89 device_printf(sc->dev, "Unable to setup intr\n"); 90 return (1); 91 } 92 93 return (0); 94 } 95 96 static int 97 pio_teardown_irq(device_t dev) 98 { 99 struct pio_softc *sc; 100 101 sc = device_get_softc(dev); 102 103 bus_teardown_intr(sc->dev, sc->res[1], sc->ih); 104 105 return (0); 106 } 107 108 static int 109 pio_read(device_t dev) 110 { 111 struct pio_softc *sc; 112 113 sc = device_get_softc(dev); 114 115 return (READ4(sc, PIO_DATA)); 116 } 117 118 static int 119 pio_set(device_t dev, int bit, int enable) 120 { 121 struct pio_softc *sc; 122 123 sc = device_get_softc(dev); 124 125 if (enable) 126 WRITE4(sc, PIO_OUTSET, bit); 127 else 128 WRITE4(sc, PIO_OUTCLR, bit); 129 130 return (0); 131 } 132 133 static int 134 pio_configure(device_t dev, int dir, int mask) 135 { 136 struct pio_softc *sc; 137 138 sc = device_get_softc(dev); 139 140 WRITE4(sc, PIO_INT_MASK, mask); 141 WRITE4(sc, PIO_DIR, dir); 142 143 return (0); 144 } 145 146 static int 147 pio_probe(device_t dev) 148 { 149 150 if (!ofw_bus_status_okay(dev)) 151 return (ENXIO); 152 153 if (!ofw_bus_is_compatible(dev, "altr,pio")) 154 return (ENXIO); 155 156 device_set_desc(dev, "Altera PIO"); 157 return (BUS_PROBE_DEFAULT); 158 } 159 160 static int 161 pio_attach(device_t dev) 162 { 163 struct pio_softc *sc; 164 struct fdt_ic *fic; 165 phandle_t node; 166 167 sc = device_get_softc(dev); 168 sc->dev = dev; 169 170 if (bus_alloc_resources(dev, pio_spec, sc->res)) { 171 device_printf(dev, "could not allocate resources\n"); 172 return (ENXIO); 173 } 174 175 /* Memory interface */ 176 sc->bst = rman_get_bustag(sc->res[0]); 177 sc->bsh = rman_get_bushandle(sc->res[0]); 178 179 if ((node = ofw_bus_get_node(sc->dev)) == -1) 180 return (ENXIO); 181 182 fic = malloc(sizeof(*fic), M_DEVBUF, M_WAITOK|M_ZERO); 183 fic->iph = node; 184 fic->dev = dev; 185 SLIST_INSERT_HEAD(&fdt_ic_list_head, fic, fdt_ics); 186 187 return (0); 188 } 189 190 static device_method_t pio_methods[] = { 191 DEVMETHOD(device_probe, pio_probe), 192 DEVMETHOD(device_attach, pio_attach), 193 194 /* pio_if.m */ 195 DEVMETHOD(pio_read, pio_read), 196 DEVMETHOD(pio_configure, pio_configure), 197 DEVMETHOD(pio_set, pio_set), 198 DEVMETHOD(pio_setup_irq, pio_setup_irq), 199 DEVMETHOD(pio_teardown_irq, pio_teardown_irq), 200 DEVMETHOD_END 201 }; 202 203 static driver_t pio_driver = { 204 "altera_pio", 205 pio_methods, 206 sizeof(struct pio_softc), 207 }; 208 209 DRIVER_MODULE(altera_pio, simplebus, pio_driver, 0, 0); 210