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/bus.h> 41 #include <sys/conf.h> 42 #include <sys/kernel.h> 43 #include <sys/lock.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/mutex.h> 47 #include <sys/resource.h> 48 #include <sys/systm.h> 49 #include <sys/uio.h> 50 51 #include <dev/ofw/ofw_bus.h> 52 53 #include <machine/bus.h> 54 #include <machine/resource.h> 55 56 #include <sys/rman.h> 57 58 #include <dev/iicbus/iicbus.h> 59 #include <dev/iicbus/iiconf.h> 60 #include <dev/pcf/pcfvar.h> 61 #include "iicbus_if.h" 62 63 #undef PCF_DEFAULT_ADDR 64 #define PCF_DEFAULT_ADDR 0x55 /* SUNW,pcf default */ 65 66 static int envctrl_probe(device_t); 67 static int envctrl_attach(device_t); 68 static int envctrl_detach(device_t); 69 70 static device_method_t envctrl_methods[] = { 71 /* device interface */ 72 DEVMETHOD(device_probe, envctrl_probe), 73 DEVMETHOD(device_attach, envctrl_attach), 74 DEVMETHOD(device_detach, envctrl_detach), 75 76 /* iicbus interface */ 77 DEVMETHOD(iicbus_callback, iicbus_null_callback), 78 DEVMETHOD(iicbus_repeated_start, pcf_repeated_start), 79 DEVMETHOD(iicbus_start, pcf_start), 80 DEVMETHOD(iicbus_stop, pcf_stop), 81 DEVMETHOD(iicbus_write, pcf_write), 82 DEVMETHOD(iicbus_read, pcf_read), 83 DEVMETHOD(iicbus_reset, pcf_rst_card), 84 { 0, 0 } 85 }; 86 87 static devclass_t envctrl_devclass; 88 89 static driver_t envctrl_driver = { 90 "envctrl", 91 envctrl_methods, 92 sizeof(struct pcf_softc), 93 }; 94 95 static int 96 envctrl_probe(device_t dev) 97 { 98 99 if (strcmp("SUNW,envctrl", ofw_bus_get_name(dev)) == 0) { 100 device_set_desc(dev, "EBus SUNW,envctrl"); 101 return (0); 102 } 103 return (ENXIO); 104 } 105 106 static int 107 envctrl_attach(device_t dev) 108 { 109 struct pcf_softc *sc; 110 int rv = ENXIO; 111 112 sc = DEVTOSOFTC(dev); 113 mtx_init(&sc->pcf_lock, device_get_nameunit(dev), "pcf", MTX_DEF); 114 115 /* IO port is mandatory */ 116 sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 117 &sc->rid_ioport, RF_ACTIVE); 118 if (sc->res_ioport == 0) { 119 device_printf(dev, "cannot reserve I/O port range\n"); 120 goto error; 121 } 122 123 sc->pcf_flags = device_get_flags(dev); 124 125 if (!(sc->pcf_flags & IIC_POLLED)) { 126 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq, 127 RF_ACTIVE); 128 if (sc->res_irq == 0) { 129 device_printf(dev, "can't reserve irq, polled mode.\n"); 130 sc->pcf_flags |= IIC_POLLED; 131 } 132 } 133 134 /* reset the chip */ 135 pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL); 136 137 rv = bus_setup_intr(dev, sc->res_irq, 138 INTR_TYPE_NET | INTR_MPSAFE /* | INTR_ENTROPY */, 139 NULL, pcf_intr, sc, &sc->intr_cookie); 140 if (rv) { 141 device_printf(dev, "could not setup IRQ\n"); 142 goto error; 143 } 144 145 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL) 146 device_printf(dev, "could not allocate iicbus instance\n"); 147 148 /* probe and attach the iicbus */ 149 bus_generic_attach(dev); 150 151 return (0); 152 153 error: 154 if (sc->res_irq != 0) { 155 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, 156 sc->res_irq); 157 } 158 if (sc->res_ioport != 0) { 159 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, 160 sc->res_ioport); 161 } 162 mtx_destroy(&sc->pcf_lock); 163 return (rv); 164 } 165 166 static int 167 envctrl_detach(device_t dev) 168 { 169 struct pcf_softc *sc; 170 int rv; 171 172 sc = DEVTOSOFTC(dev); 173 174 if ((rv = bus_generic_detach(dev)) != 0) 175 return (rv); 176 177 if ((rv = device_delete_child(dev, sc->iicbus)) != 0) 178 return (rv); 179 180 if (sc->res_irq != 0) { 181 bus_teardown_intr(dev, sc->res_irq, sc->intr_cookie); 182 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq); 183 } 184 185 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, sc->res_ioport); 186 mtx_destroy(&sc->pcf_lock); 187 188 return (0); 189 } 190 191 DRIVER_MODULE(envctrl, ebus, envctrl_driver, envctrl_devclass, 0, 0); 192 DRIVER_MODULE(iicbus, envctrl, iicbus_driver, iicbus_devclass, 0, 0); 193