envctrl.c revision 155921
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: head/sys/dev/pcf/envctrl.c 155921 2006-02-22 18:16:26Z jhb $"); 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/module.h> 46#include <sys/resource.h> 47#include <sys/uio.h> 48 49#include <dev/ofw/ofw_bus.h> 50 51#include <machine/bus.h> 52#include <machine/resource.h> 53 54#include <sys/rman.h> 55 56#include <dev/iicbus/iiconf.h> 57#include <dev/pcf/pcfvar.h> 58#include "iicbus_if.h" 59 60#undef PCF_DEFAULT_ADDR 61#define PCF_DEFAULT_ADDR 0x55 /* SUNW,pcf default */ 62 63static int envctrl_probe(device_t); 64static int envctrl_attach(device_t); 65static int envctrl_detach(device_t); 66 67static device_method_t envctrl_methods[] = { 68 /* device interface */ 69 DEVMETHOD(device_probe, envctrl_probe), 70 DEVMETHOD(device_attach, envctrl_attach), 71 DEVMETHOD(device_detach, envctrl_detach), 72 73 /* iicbus interface */ 74 DEVMETHOD(iicbus_callback, iicbus_null_callback), 75 DEVMETHOD(iicbus_repeated_start, pcf_repeated_start), 76 DEVMETHOD(iicbus_start, pcf_start), 77 DEVMETHOD(iicbus_stop, pcf_stop), 78 DEVMETHOD(iicbus_write, pcf_write), 79 DEVMETHOD(iicbus_read, pcf_read), 80 DEVMETHOD(iicbus_reset, pcf_rst_card), 81 { 0, 0 } 82}; 83 84static devclass_t envctrl_devclass; 85 86static driver_t envctrl_driver = { 87 "envctrl", 88 envctrl_methods, 89 sizeof(struct pcf_softc), 90}; 91 92static int 93envctrl_probe(device_t dev) 94{ 95 96 if (strcmp("SUNW,envctrl", ofw_bus_get_name(dev)) == 0) { 97 device_set_desc(dev, "EBus SUNW,envctrl"); 98 return (0); 99 } 100 return (ENXIO); 101} 102 103static int 104envctrl_attach(device_t dev) 105{ 106 struct pcf_softc *sc; 107 int rv = ENXIO; 108 109 sc = DEVTOSOFTC(dev); 110 bzero(sc, sizeof(struct pcf_softc)); 111 112 /* IO port is mandatory */ 113 sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 114 &sc->rid_ioport, RF_ACTIVE); 115 if (sc->res_ioport == 0) { 116 device_printf(dev, "cannot reserve I/O port range\n"); 117 goto error; 118 } 119 sc->bt_ioport = rman_get_bustag(sc->res_ioport); 120 sc->bh_ioport = rman_get_bushandle(sc->res_ioport); 121 122 sc->pcf_flags = device_get_flags(dev); 123 124 if (!(sc->pcf_flags & IIC_POLLED)) { 125 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq, 126 RF_ACTIVE); 127 if (sc->res_irq == 0) { 128 device_printf(dev, "can't reserve irq, polled mode.\n"); 129 sc->pcf_flags |= IIC_POLLED; 130 } 131 } 132 133 /* reset the chip */ 134 pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL); 135 136 rv = bus_setup_intr(dev, sc->res_irq, 137 INTR_TYPE_NET /* | INTR_ENTROPY */, 138 pcf_intr, sc, &sc->intr_cookie); 139 if (rv) { 140 device_printf(dev, "could not setup IRQ\n"); 141 goto error; 142 } 143 144 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) 145 device_printf(dev, "could not allocate iicbus instance\n"); 146 147 /* probe and attach the iicbus */ 148 bus_generic_attach(dev); 149 150 return (0); 151 152error: 153 if (sc->res_irq != 0) { 154 bus_deactivate_resource(dev, SYS_RES_IRQ, sc->rid_irq, 155 sc->res_irq); 156 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, 157 sc->res_irq); 158 } 159 if (sc->res_ioport != 0) { 160 bus_deactivate_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, 161 sc->res_ioport); 162 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, 163 sc->res_ioport); 164 } 165 return (rv); 166} 167 168static int 169envctrl_detach(device_t dev) 170{ 171 struct pcf_softc *sc; 172 int rv; 173 174 sc = DEVTOSOFTC(dev); 175 176 if ((rv = bus_generic_detach(dev)) != 0) 177 return (rv); 178 179 if ((rv = device_delete_child(dev, sc->iicbus)) != 0) 180 return (rv); 181 182 if (sc->res_irq != 0) { 183 bus_teardown_intr(dev, sc->res_irq, 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_MEMORY, sc->rid_ioport, sc->res_ioport); 189 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, sc->res_ioport); 190 191 return (0); 192} 193 194DRIVER_MODULE(envctrl, ebus, envctrl_driver, envctrl_devclass, 0, 0); 195MODULE_DEPEND(envctrl, iicbus, PCF_MINVER, PCF_PREFVER, PCF_MAXVER); 196MODULE_VERSION(envctrl, PCF_MODVER); 197