uart_iobus.c revision 160721
1/*- 2 * Copyright 2002 by Peter Grehan. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: head/sys/powerpc/psim/uart_iobus.c 146734 2005-05-29 04:42:30Z nyan $ 28 */ 29 30/* 31 * PSIM local bus 16550 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/conf.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/malloc.h> 41#include <sys/mutex.h> 42#include <sys/module.h> 43#include <sys/tty.h> 44#include <machine/bus.h> 45#include <sys/timepps.h> 46 47#include <dev/ofw/openfirm.h> 48#include <powerpc/psim/iobusvar.h> 49 50#include <dev/sio/sioreg.h> 51#include <dev/sio/siovar.h> 52 53#include <isa/isavar.h> /* for isa_irq_pending() prototype */ 54 55static int sio_iobus_attach(device_t dev); 56static int sio_iobus_probe(device_t dev); 57 58static device_method_t sio_iobus_methods[] = { 59 /* Device interface */ 60 DEVMETHOD(device_probe, sio_iobus_probe), 61 DEVMETHOD(device_attach, sio_iobus_attach), 62 63 { 0, 0 } 64}; 65 66static driver_t sio_iobus_driver = { 67 sio_driver_name, 68 sio_iobus_methods, 69 0, 70}; 71 72static int 73sio_iobus_attach(device_t dev) 74{ 75 return (sioattach(dev, 0, DEFAULT_RCLK)); 76} 77 78static int 79sio_iobus_probe(device_t dev) 80{ 81 char *type = iobus_get_name(dev); 82 83 if (strncmp(type, "com", 3) != 0) 84 return (ENXIO); 85 86 87 device_set_desc(dev, "PSIM serial port"); 88 89 /* 90 * Call sioprobe with noprobe=1, to avoid hitting a psim bug 91 */ 92 return (sioprobe(dev, 0, 0, 1)); 93} 94 95DRIVER_MODULE(sio, iobus, sio_iobus_driver, sio_devclass, 0, 0); 96 97/* 98 * Stub function. Perhaps a way to get this to work correctly would 99 * be for child devices to set a field in the dev structure to 100 * inform the parent that they are isa devices, and then use a 101 * intr_pending() call which would propagate up to nexus to see 102 * if the interrupt controller had any intrs in the isa group set 103 */ 104intrmask_t 105isa_irq_pending(void) 106{ 107 return (0); 108} 109