1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 39 #include <machine/bus.h> 40 #include <sys/rman.h> 41 #include <machine/resource.h> 42 43 #include <dev/scc/scc_bus.h> 44 45 #include <dev/uart/uart.h> 46 #include <dev/uart/uart_bus.h> 47 48 static int uart_scc_attach(device_t dev); 49 static int uart_scc_probe(device_t dev); 50 51 static device_method_t uart_scc_methods[] = { 52 /* Device interface */ 53 DEVMETHOD(device_probe, uart_scc_probe), 54 DEVMETHOD(device_attach, uart_scc_attach), 55 DEVMETHOD(device_detach, uart_bus_detach), 56 /* Serdev interface */ 57 DEVMETHOD(serdev_ihand, uart_bus_ihand), 58 DEVMETHOD(serdev_sysdev, uart_bus_sysdev), 59 { 0, 0 } 60 }; 61 62 static driver_t uart_scc_driver = { 63 uart_driver_name, 64 uart_scc_methods, 65 sizeof(struct uart_softc), 66 }; 67 68 static int 69 uart_scc_attach(device_t dev) 70 { 71 device_t parent; 72 struct uart_softc *sc; 73 uintptr_t mtx; 74 75 parent = device_get_parent(dev); 76 sc = device_get_softc(dev); 77 78 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_HWMTX, &mtx)) 79 return (ENXIO); 80 sc->sc_hwmtx = (struct mtx *)(void *)mtx; 81 return (uart_bus_attach(dev)); 82 } 83 84 static int 85 uart_scc_probe(device_t dev) 86 { 87 device_t parent; 88 struct uart_softc *sc; 89 uintptr_t ch, cl, md, rs; 90 91 parent = device_get_parent(dev); 92 sc = device_get_softc(dev); 93 94 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_MODE, &md) || 95 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLASS, &cl)) 96 return (ENXIO); 97 if (md != SCC_MODE_ASYNC) 98 return (ENXIO); 99 switch (cl) { 100 case SCC_CLASS_QUICC: 101 sc->sc_class = &uart_quicc_class; 102 break; 103 case SCC_CLASS_Z8530: 104 sc->sc_class = &uart_z8530_class; 105 break; 106 default: 107 return (ENXIO); 108 } 109 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_CHANNEL, &ch) || 110 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLOCK, &cl) || 111 BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs)) 112 return (ENXIO); 113 114 return (uart_bus_probe(dev, rs, 0, cl, 0, ch, 0)); 115 } 116 117 DRIVER_MODULE(uart, scc, uart_scc_driver, uart_devclass, 0, 0); 118