1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003-2012 Broadcom Corporation 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 18 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/rman.h> 38 39 #include <dev/iicbus/iicbus.h> 40 #include <dev/iicbus/iiconf.h> 41 42 #include <dev/pci/pcireg.h> 43 #include <dev/pci/pcivar.h> 44 45 #include "iicbus_if.h" 46 #include "iicoc.h" 47 48 static int 49 iicoc_detach(device_t dev) 50 { 51 struct iicoc_softc *sc; 52 53 sc = device_get_softc(dev); 54 device_delete_children(dev); 55 bus_generic_detach(dev); 56 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem_res); 57 mtx_destroy(&sc->sc_mtx); 58 59 return (0); 60 } 61 62 /* 63 * We add all the devices which we know about. 64 * The generic attach routine will attach them if they are alive. 65 */ 66 static int 67 iicoc_attach(device_t dev) 68 { 69 struct iicoc_softc *sc; 70 71 sc = device_get_softc(dev); 72 73 sc->dev = dev; 74 mtx_init(&sc->sc_mtx, "iicoc", "iicoc", MTX_DEF); 75 sc->mem_rid = 0; 76 sc->mem_res = bus_alloc_resource_anywhere(dev, 77 SYS_RES_MEMORY, &sc->mem_rid, 0x100, RF_ACTIVE); 78 79 if (sc->mem_res == NULL) { 80 device_printf(dev, "Could not allocate bus resource.\n"); 81 return (-1); 82 } 83 iicoc_init(dev); 84 sc->iicbus = device_add_child(dev, "iicbus", -1); 85 if (sc->iicbus == NULL) { 86 device_printf(dev, "Could not allocate iicbus instance.\n"); 87 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, 88 sc->mem_res); 89 mtx_destroy(&sc->sc_mtx); 90 return (-1); 91 } 92 bus_generic_attach(dev); 93 94 return (0); 95 } 96 97 static int 98 iicoc_probe(device_t dev) 99 { 100 struct iicoc_softc *sc; 101 102 sc = device_get_softc(dev); 103 if ((pci_get_vendor(dev) == 0x184e) && 104 (pci_get_device(dev) == 0x1011)) { 105 sc->clockfreq = XLP_I2C_CLKFREQ; 106 sc->i2cfreq = XLP_I2C_FREQ; 107 sc->reg_shift = 2; 108 device_set_desc(dev, "Netlogic XLP I2C Controller"); 109 return (BUS_PROBE_DEFAULT); 110 } 111 return (ENXIO); 112 } 113 114 static device_method_t iicoc_methods[] = { 115 /* device interface */ 116 DEVMETHOD(device_probe, iicoc_probe), 117 DEVMETHOD(device_attach, iicoc_attach), 118 DEVMETHOD(device_detach, iicoc_detach), 119 120 /* iicbus interface */ 121 DEVMETHOD(iicbus_callback, iicbus_null_callback), 122 DEVMETHOD(iicbus_repeated_start, iicoc_iicbus_repeated_start), 123 DEVMETHOD(iicbus_start, iicoc_iicbus_start), 124 DEVMETHOD(iicbus_stop, iicoc_iicbus_stop), 125 DEVMETHOD(iicbus_reset, iicoc_iicbus_reset), 126 DEVMETHOD(iicbus_write, iicoc_iicbus_write), 127 DEVMETHOD(iicbus_read, iicoc_iicbus_read), 128 DEVMETHOD(iicbus_transfer, iicbus_transfer_gen), 129 130 DEVMETHOD_END 131 }; 132 133 static driver_t iicoc_driver = { 134 "iicoc", 135 iicoc_methods, 136 sizeof(struct iicoc_softc), 137 }; 138 139 DRIVER_MODULE(iicoc, pci, iicoc_driver, 0, 0); 140