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/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 45 #include <dev/fdt/fdt_common.h> 46 #include <dev/ofw/openfirm.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <machine/bus.h> 51 #include <machine/fdt.h> 52 #include <machine/cpu.h> 53 54 #include <dev/altera/pio/pio.h> 55 #include "pio_if.h" 56 57 #define READ4(_sc, _reg) bus_read_4((_sc)->res[0], _reg) 58 #define READ2(_sc, _reg) bus_read_2((_sc)->res[0], _reg) 59 #define READ1(_sc, _reg) bus_read_1((_sc)->res[0], _reg) 60 #define WRITE4(_sc, _reg, _val) bus_write_4((_sc)->res[0], _reg, _val) 61 #define WRITE2(_sc, _reg, _val) bus_write_2((_sc)->res[0], _reg, _val) 62 #define WRITE1(_sc, _reg, _val) bus_write_1((_sc)->res[0], _reg, _val) 63 64 struct pio_softc { 65 struct resource *res[2]; 66 bus_space_tag_t bst; 67 bus_space_handle_t bsh; 68 device_t dev; 69 void *ih; 70 }; 71 72 static struct resource_spec pio_spec[] = { 73 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 74 { SYS_RES_IRQ, 0, RF_ACTIVE }, 75 { -1, 0 } 76 }; 77 78 static int 79 pio_setup_irq(device_t dev, void *intr_handler, void *ih_user) 80 { 81 struct pio_softc *sc; 82 83 sc = device_get_softc(dev); 84 85 /* Setup interrupt handlers */ 86 if (bus_setup_intr(sc->dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE, 87 NULL, intr_handler, ih_user, &sc->ih)) { 88 device_printf(sc->dev, "Unable to setup intr\n"); 89 return (1); 90 } 91 92 return (0); 93 } 94 95 static int 96 pio_teardown_irq(device_t dev) 97 { 98 struct pio_softc *sc; 99 100 sc = device_get_softc(dev); 101 102 bus_teardown_intr(sc->dev, sc->res[1], sc->ih); 103 104 return (0); 105 } 106 107 static int 108 pio_read(device_t dev) 109 { 110 struct pio_softc *sc; 111 112 sc = device_get_softc(dev); 113 114 return (READ4(sc, PIO_DATA)); 115 } 116 117 static int 118 pio_set(device_t dev, int bit, int enable) 119 { 120 struct pio_softc *sc; 121 122 sc = device_get_softc(dev); 123 124 if (enable) 125 WRITE4(sc, PIO_OUTSET, bit); 126 else 127 WRITE4(sc, PIO_OUTCLR, bit); 128 129 return (0); 130 } 131 132 static int 133 pio_configure(device_t dev, int dir, int mask) 134 { 135 struct pio_softc *sc; 136 137 sc = device_get_softc(dev); 138 139 WRITE4(sc, PIO_INT_MASK, mask); 140 WRITE4(sc, PIO_DIR, dir); 141 142 return (0); 143 } 144 145 static int 146 pio_probe(device_t dev) 147 { 148 149 if (!ofw_bus_status_okay(dev)) 150 return (ENXIO); 151 152 if (!ofw_bus_is_compatible(dev, "altr,pio")) 153 return (ENXIO); 154 155 device_set_desc(dev, "Altera PIO"); 156 return (BUS_PROBE_DEFAULT); 157 } 158 159 static int 160 pio_attach(device_t dev) 161 { 162 struct pio_softc *sc; 163 struct fdt_ic *fic; 164 phandle_t node; 165 166 sc = device_get_softc(dev); 167 sc->dev = dev; 168 169 if (bus_alloc_resources(dev, pio_spec, sc->res)) { 170 device_printf(dev, "could not allocate resources\n"); 171 return (ENXIO); 172 } 173 174 /* Memory interface */ 175 sc->bst = rman_get_bustag(sc->res[0]); 176 sc->bsh = rman_get_bushandle(sc->res[0]); 177 178 if ((node = ofw_bus_get_node(sc->dev)) == -1) 179 return (ENXIO); 180 181 fic = malloc(sizeof(*fic), M_DEVBUF, M_WAITOK|M_ZERO); 182 fic->iph = node; 183 fic->dev = dev; 184 SLIST_INSERT_HEAD(&fdt_ic_list_head, fic, fdt_ics); 185 186 return (0); 187 } 188 189 static device_method_t pio_methods[] = { 190 DEVMETHOD(device_probe, pio_probe), 191 DEVMETHOD(device_attach, pio_attach), 192 193 /* pio_if.m */ 194 DEVMETHOD(pio_read, pio_read), 195 DEVMETHOD(pio_configure, pio_configure), 196 DEVMETHOD(pio_set, pio_set), 197 DEVMETHOD(pio_setup_irq, pio_setup_irq), 198 DEVMETHOD(pio_teardown_irq, pio_teardown_irq), 199 DEVMETHOD_END 200 }; 201 202 static driver_t pio_driver = { 203 "altera_pio", 204 pio_methods, 205 sizeof(struct pio_softc), 206 }; 207 208 DRIVER_MODULE(altera_pio, simplebus, pio_driver, 0, 0); 209