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      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 
     52 static int  com_intio_match(device_t, cfdata_t, void *);
     53 static void com_intio_attach(device_t, device_t, void *);
     54 
     55 CFATTACH_DECL_NEW(com_intio, sizeof(struct com_softc),
     56     com_intio_match, com_intio_attach, NULL, NULL);
     57 
     58 static int
     59 com_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 
     92 static void
     93 com_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