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/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/rman.h> 37 38 #include <dev/iicbus/iicbus.h> 39 #include <dev/iicbus/iiconf.h> 40 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/pcivar.h> 43 44 #include "iicbus_if.h" 45 #include "iicoc.h" 46 47 static int 48 iicoc_detach(device_t dev) 49 { 50 struct iicoc_softc *sc; 51 52 sc = device_get_softc(dev); 53 device_delete_children(dev); 54 bus_generic_detach(dev); 55 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem_res); 56 mtx_destroy(&sc->sc_mtx); 57 58 return (0); 59 } 60 61 /* 62 * We add all the devices which we know about. 63 * The generic attach routine will attach them if they are alive. 64 */ 65 static int 66 iicoc_attach(device_t dev) 67 { 68 struct iicoc_softc *sc; 69 70 sc = device_get_softc(dev); 71 72 sc->dev = dev; 73 mtx_init(&sc->sc_mtx, "iicoc", "iicoc", MTX_DEF); 74 sc->mem_rid = 0; 75 sc->mem_res = bus_alloc_resource_anywhere(dev, 76 SYS_RES_MEMORY, &sc->mem_rid, 0x100, RF_ACTIVE); 77 78 if (sc->mem_res == NULL) { 79 device_printf(dev, "Could not allocate bus resource.\n"); 80 return (-1); 81 } 82 iicoc_init(dev); 83 sc->iicbus = device_add_child(dev, "iicbus", -1); 84 if (sc->iicbus == NULL) { 85 device_printf(dev, "Could not allocate iicbus instance.\n"); 86 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, 87 sc->mem_res); 88 mtx_destroy(&sc->sc_mtx); 89 return (-1); 90 } 91 bus_generic_attach(dev); 92 93 return (0); 94 } 95 96 static int 97 iicoc_probe(device_t dev) 98 { 99 struct iicoc_softc *sc; 100 101 sc = device_get_softc(dev); 102 if ((pci_get_vendor(dev) == 0x184e) && 103 (pci_get_device(dev) == 0x1011)) { 104 sc->clockfreq = XLP_I2C_CLKFREQ; 105 sc->i2cfreq = XLP_I2C_FREQ; 106 sc->reg_shift = 2; 107 device_set_desc(dev, "Netlogic XLP I2C Controller"); 108 return (BUS_PROBE_DEFAULT); 109 } 110 return (ENXIO); 111 } 112 113 static device_method_t iicoc_methods[] = { 114 /* device interface */ 115 DEVMETHOD(device_probe, iicoc_probe), 116 DEVMETHOD(device_attach, iicoc_attach), 117 DEVMETHOD(device_detach, iicoc_detach), 118 119 /* iicbus interface */ 120 DEVMETHOD(iicbus_callback, iicbus_null_callback), 121 DEVMETHOD(iicbus_repeated_start, iicoc_iicbus_repeated_start), 122 DEVMETHOD(iicbus_start, iicoc_iicbus_start), 123 DEVMETHOD(iicbus_stop, iicoc_iicbus_stop), 124 DEVMETHOD(iicbus_reset, iicoc_iicbus_reset), 125 DEVMETHOD(iicbus_write, iicoc_iicbus_write), 126 DEVMETHOD(iicbus_read, iicoc_iicbus_read), 127 DEVMETHOD(iicbus_transfer, iicbus_transfer_gen), 128 129 DEVMETHOD_END 130 }; 131 132 static driver_t iicoc_driver = { 133 "iicoc", 134 iicoc_methods, 135 sizeof(struct iicoc_softc), 136 }; 137 138 DRIVER_MODULE(iicoc, pci, iicoc_driver, 0, 0); 139