1 /*- 2 * Copyright (c) 2004 Joerg Wunsch 3 * 4 * derived from sys/i386/isa/pcf.c which is: 5 * 6 * Copyright (c) 1998 Nicolas Souchu, Marc Bouget 7 * All rights reserved. 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 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * Device specific driver for the SUNW,envctrl device found on some 35 * UltraSPARC Sun systems. This device is a Philips PCF8584 sitting 36 * on the Ebus2. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 #include <sys/resource.h> 46 #include <sys/uio.h> 47 48 #include <machine/bus.h> 49 #include <machine/resource.h> 50 51 #include <sys/rman.h> 52 53 #include <dev/ofw/openfirm.h> 54 55 #include <sparc64/ebus/ebusvar.h> 56 57 #include <dev/iicbus/iiconf.h> 58 #include <dev/pcf/pcfvar.h> 59 #include "iicbus_if.h" 60 61 #undef PCF_DEFAULT_ADDR 62 #define PCF_DEFAULT_ADDR 0x55 /* SUNW,pcf default */ 63 64 static int envctrl_probe(device_t); 65 static int envctrl_attach(device_t); 66 static int envctrl_detach(device_t); 67 68 static device_method_t envctrl_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, envctrl_probe), 71 DEVMETHOD(device_attach, envctrl_attach), 72 DEVMETHOD(device_detach, envctrl_detach), 73 74 /* iicbus interface */ 75 DEVMETHOD(iicbus_callback, iicbus_null_callback), 76 DEVMETHOD(iicbus_repeated_start, pcf_repeated_start), 77 DEVMETHOD(iicbus_start, pcf_start), 78 DEVMETHOD(iicbus_stop, pcf_stop), 79 DEVMETHOD(iicbus_write, pcf_write), 80 DEVMETHOD(iicbus_read, pcf_read), 81 DEVMETHOD(iicbus_reset, pcf_rst_card), 82 { 0, 0 } 83 }; 84 85 static devclass_t envctrl_devclass; 86 87 static driver_t envctrl_driver = { 88 "envctrl", 89 envctrl_methods, 90 sizeof(struct pcf_softc), 91 }; 92 93 static int 94 envctrl_probe(device_t dev) 95 { 96 97 if (strcmp("SUNW,envctrl", ebus_get_name(dev)) == 0) { 98 device_set_desc(dev, "EBus SUNW,envctrl"); 99 return (0); 100 } 101 return (ENXIO); 102 } 103 104 static int 105 envctrl_attach(device_t dev) 106 { 107 struct pcf_softc *sc; 108 int rv = ENXIO; 109 110 sc = DEVTOSOFTC(dev); 111 bzero(sc, sizeof(struct pcf_softc)); 112 113 /* IO port is mandatory */ 114 sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 115 &sc->rid_ioport, RF_ACTIVE); 116 if (sc->res_ioport == 0) { 117 device_printf(dev, "cannot reserve I/O port range\n"); 118 goto error; 119 } 120 121 sc->pcf_flags = device_get_flags(dev); 122 123 if (!(sc->pcf_flags & IIC_POLLED)) { 124 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq, 125 RF_ACTIVE); 126 if (sc->res_irq == 0) { 127 device_printf(dev, "can't reserve irq, polled mode.\n"); 128 sc->pcf_flags |= IIC_POLLED; 129 } 130 } 131 132 /* reset the chip */ 133 pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL); 134 135 rv = BUS_SETUP_INTR(device_get_parent(dev), dev, sc->res_irq, 136 INTR_TYPE_NET /* | INTR_ENTROPY */, 137 pcf_intr, sc, &sc->intr_cookie); 138 if (rv) { 139 device_printf(dev, "could not setup IRQ\n"); 140 goto error; 141 } 142 143 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) 144 device_printf(dev, "could not allocate iicbus instance\n"); 145 146 /* probe and attach the iicbus */ 147 bus_generic_attach(dev); 148 149 return (0); 150 151 error: 152 if (sc->res_irq != 0) { 153 bus_deactivate_resource(dev, SYS_RES_IRQ, sc->rid_irq, 154 sc->res_irq); 155 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, 156 sc->res_irq); 157 } 158 if (sc->res_ioport != 0) { 159 bus_deactivate_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, 160 sc->res_ioport); 161 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, 162 sc->res_ioport); 163 } 164 return (rv); 165 } 166 167 static int 168 envctrl_detach(device_t dev) 169 { 170 struct pcf_softc *sc; 171 int rv; 172 173 sc = DEVTOSOFTC(dev); 174 175 if ((rv = bus_generic_detach(dev)) != 0) 176 return (rv); 177 178 if ((rv = device_delete_child(dev, sc->iicbus)) != 0) 179 return (rv); 180 181 if (sc->res_irq != 0) { 182 BUS_TEARDOWN_INTR(device_get_parent(dev), dev, sc->res_irq, 183 sc->intr_cookie); 184 bus_deactivate_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq); 185 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq); 186 } 187 188 bus_deactivate_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, sc->res_ioport); 189 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, sc->res_ioport); 190 191 return (0); 192 } 193 194 DRIVER_MODULE(pcf, ebus, envctrl_driver, envctrl_devclass, 0, 0); 195 MODULE_DEPEND(pcf, iicbus, PCF_MINVER, PCF_PREFVER, PCF_MAXVER); 196 MODULE_VERSION(pcf, PCF_MODVER); 197