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131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/* $NetBSD: com_intio.c,v 1.1 2012/04/29 07:17:12 tsutsui Exp $ */
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/*
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* Copyright (c) 2009 Tetsuya Isaki. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* PSX16550, High-speed RS-232C board
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: com_intio.c,v 1.1 2012/04/29 07:17:12 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/tty.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <machine/cpu.h>
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#include <arch/x68k/dev/intiovar.h>
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#define COM_PSX16550_FREQ (22118400 / 2)
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#define COM_PSX16550_SIZE (COM_NPORTS << 1)
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#define COM_PSX16550_REG_VECT com_scratch
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static int com_intio_match(device_t, cfdata_t, void *);
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static void com_intio_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(com_intio, sizeof(struct com_softc),
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com_intio_match, com_intio_attach, NULL, NULL);
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static int
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com_intio_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct intio_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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int iobase;
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int rv;
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/* Check whether the board is inserted or not */
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if (badaddr((void *)IIOV(ia->ia_addr)))
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return 0;
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ia->ia_size = COM_PSX16550_SIZE;
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if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY) < 0)
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return 0;
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iot = ia->ia_bst;
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iobase = ia->ia_addr;
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/* if it's in use as console, it's there. */
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if (com_is_console(iot, iobase, NULL))
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return 1;
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if (bus_space_map(iot, iobase, ia->ia_size,
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BUS_SPACE_MAP_SHIFTED_ODD, &ioh))
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return 0;
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rv = comprobe1(iot, ioh);
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bus_space_unmap(iot, ioh, ia->ia_size);
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return rv;
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}
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static void
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com_intio_attach(device_t parent, device_t self, void *aux)
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{
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struct com_softc *sc = device_private(self);
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struct intio_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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int iobase;
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intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
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sc->sc_dev = self;
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iot = ia->ia_bst;
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iobase = ia->ia_addr;
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if (bus_space_map(iot, iobase, ia->ia_size,
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BUS_SPACE_MAP_SHIFTED_ODD, &ioh)) {
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aprint_error(": can't map I/O space\n");
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return;
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}
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/* check and set interrupt vector */
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if (ia->ia_intr < 16 || ia->ia_intr > 255) {
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aprint_error(": invalid intr vector (0x%02x)\n", ia->ia_intr);
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return;
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}
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bus_space_write_1(iot, ioh, COM_PSX16550_REG_VECT, ia->ia_intr);
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sc->sc_frequency = COM_PSX16550_FREQ;
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COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
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/* PSX16550 uses MCR_DRS to switch interrupt priority level */
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SET(sc->sc_mcr, MCR_DRS); /* 0: ipl2 / 1: ipl4 */
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com_attach_subr(sc);
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if (intio_intr_establish(ia->ia_intr, device_xname(self),
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comintr, sc))
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aprint_error_dev(self, "can't establish interrupt handler\n");
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}
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