1/* $NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 2009 Tetsuya Isaki. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 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 28/* 29 * PSX16550, High-speed RS-232C board 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/tty.h> 38#include <sys/device.h> 39#include <sys/bus.h> 40 41#include <dev/ic/comreg.h> 42#include <dev/ic/comvar.h> 43 44#include <machine/cpu.h> 45 46#include <arch/x68k/dev/intiovar.h> 47 48#define COM_PSX16550_FREQ (22118400 / 2) 49#define COM_PSX16550_SIZE (COM_NPORTS << 1) 50#define COM_PSX16550_REG_VECT com_scratch 51 52static int com_intio_match(device_t, cfdata_t, void *); 53static void com_intio_attach(device_t, device_t, void *); 54 55CFATTACH_DECL_NEW(com_intio, sizeof(struct com_softc), 56 com_intio_match, com_intio_attach, NULL, NULL); 57 58static int 59com_intio_match(device_t parent, cfdata_t cf, void *aux) 60{ 61 struct intio_attach_args *ia = aux; 62 bus_space_tag_t iot; 63 bus_space_handle_t ioh; 64 int iobase; 65 int rv; 66 67 /* Check whether the board is inserted or not */ 68 if (badaddr((void *)IIOV(ia->ia_addr))) 69 return 0; 70 71 ia->ia_size = COM_PSX16550_SIZE; 72 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY) < 0) 73 return 0; 74 75 iot = ia->ia_bst; 76 iobase = ia->ia_addr; 77 78 /* if it's in use as console, it's there. */ 79 if (com_is_console(iot, iobase, NULL)) 80 return 1; 81 82 if (bus_space_map(iot, iobase, ia->ia_size, 83 BUS_SPACE_MAP_SHIFTED_ODD, &ioh)) 84 return 0; 85 86 rv = comprobe1(iot, ioh); 87 bus_space_unmap(iot, ioh, ia->ia_size); 88 89 return rv; 90} 91 92static void 93com_intio_attach(device_t parent, device_t self, void *aux) 94{ 95 struct com_softc *sc = device_private(self); 96 struct intio_attach_args *ia = aux; 97 bus_space_tag_t iot; 98 bus_space_handle_t ioh; 99 int iobase; 100 101 intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE); 102 103 sc->sc_dev = self; 104 iot = ia->ia_bst; 105 iobase = ia->ia_addr; 106 if (bus_space_map(iot, iobase, ia->ia_size, 107 BUS_SPACE_MAP_SHIFTED_ODD, &ioh)) { 108 aprint_error(": can't map I/O space\n"); 109 return; 110 } 111 112 /* check and set interrupt vector */ 113 if (ia->ia_intr < 16 || ia->ia_intr > 255) { 114 aprint_error(": invalid intr vector (0x%02x)\n", ia->ia_intr); 115 return; 116 } 117 bus_space_write_1(iot, ioh, COM_PSX16550_REG_VECT, ia->ia_intr); 118 119 sc->sc_frequency = COM_PSX16550_FREQ; 120 com_init_regs(&sc->sc_regs, iot, ioh, iobase); 121 122 /* PSX16550 uses MCR_DRS to switch interrupt priority level */ 123 SET(sc->sc_mcr, MCR_DRS); /* 0: ipl2 / 1: ipl4 */ 124 125 com_attach_subr(sc); 126 127 if (intio_intr_establish(ia->ia_intr, device_xname(self), 128 comintr, sc)) 129 aprint_error_dev(self, "can't establish interrupt handler\n"); 130} 131