1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2004-2006 Marcel Moolenaar 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 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bus.h> 32 #include <sys/conf.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 36 #include <machine/bus.h> 37 #include <sys/rman.h> 38 #include <machine/resource.h> 39 40 #include <dev/scc/scc_bus.h> 41 42 #include <dev/uart/uart.h> 43 #include <dev/uart/uart_bus.h> 44 45 static int uart_scc_attach(device_t dev); 46 static int uart_scc_probe(device_t dev); 47 48 static device_method_t uart_scc_methods[] = { 49 /* Device interface */ 50 DEVMETHOD(device_probe, uart_scc_probe), 51 DEVMETHOD(device_attach, uart_scc_attach), 52 DEVMETHOD(device_detach, uart_bus_detach), 53 /* Serdev interface */ 54 DEVMETHOD(serdev_ihand, uart_bus_ihand), 55 DEVMETHOD(serdev_sysdev, uart_bus_sysdev), 56 { 0, 0 } 57 }; 58 59 static driver_t uart_scc_driver = { 60 uart_driver_name, 61 uart_scc_methods, 62 sizeof(struct uart_softc), 63 }; 64 65 static int 66 uart_scc_attach(device_t dev) 67 { 68 device_t parent; 69 struct uart_softc *sc; 70 uintptr_t mtx; 71 72 parent = device_get_parent(dev); 73 sc = device_get_softc(dev); 74 75 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_HWMTX, &mtx)) 76 return (ENXIO); 77 sc->sc_hwmtx = (struct mtx *)(void *)mtx; 78 return (uart_bus_attach(dev)); 79 } 80 81 static int 82 uart_scc_probe(device_t dev) 83 { 84 device_t parent; 85 struct uart_softc *sc; 86 uintptr_t ch, cl, md, rs; 87 88 parent = device_get_parent(dev); 89 sc = device_get_softc(dev); 90 91 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_MODE, &md) || 92 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLASS, &cl)) 93 return (ENXIO); 94 if (md != SCC_MODE_ASYNC) 95 return (ENXIO); 96 switch (cl) { 97 case SCC_CLASS_QUICC: 98 sc->sc_class = &uart_quicc_class; 99 break; 100 case SCC_CLASS_Z8530: 101 sc->sc_class = &uart_z8530_class; 102 break; 103 default: 104 return (ENXIO); 105 } 106 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_CHANNEL, &ch) || 107 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLOCK, &cl) || 108 BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs)) 109 return (ENXIO); 110 111 return (uart_bus_probe(dev, rs, 0, cl, 0, ch, 0)); 112 } 113 114 DRIVER_MODULE(uart, scc, uart_scc_driver, 0, 0); 115