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com_jensenio.c revision 1.16 
      1 /* $NetBSD: com_jensenio.c,v 1.16 2020/09/19 16:54:34 tsutsui Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     33 
     34 __KERNEL_RCSID(0, "$NetBSD: com_jensenio.c,v 1.16 2020/09/19 16:54:34 tsutsui Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/ioctl.h>
     39 #include <sys/select.h>
     40 #include <sys/tty.h>
     41 #include <sys/proc.h>
     42 #include <sys/conf.h>
     43 #include <sys/file.h>
     44 #include <sys/uio.h>
     45 #include <sys/kernel.h>
     46 #include <sys/syslog.h>
     47 #include <sys/types.h>
     48 #include <sys/device.h>
     49 
     50 #include <machine/intr.h>
     51 #include <sys/bus.h>
     52 
     53 #include <dev/ic/comreg.h>
     54 #include <dev/ic/comvar.h>
     55 
     56 #include <dev/eisa/eisavar.h>
     57 
     58 #include <dev/isa/isavar.h>
     59 
     60 #include <alpha/jensenio/jenseniovar.h>
     61 
     62 struct com_jensenio_softc {
     63 	struct	com_softc sc_com;	/* real "com" softc */
     64 
     65 	/* Jensen-specific goo. */
     66 	char	sc_vecstr[8];
     67 	struct evcnt sc_ev_intr;
     68 };
     69 
     70 int	com_jensenio_match(device_t, cfdata_t , void *);
     71 void	com_jensenio_attach(device_t, device_t, void *);
     72 
     73 CFATTACH_DECL_NEW(com_jensenio, sizeof(struct com_jensenio_softc),
     74     com_jensenio_match, com_jensenio_attach, NULL, NULL);
     75 
     76 void	com_jensenio_intr(void *, u_long);
     77 
     78 int
     79 com_jensenio_match(device_t parent, cfdata_t match, void *aux)
     80 {
     81 	struct jensenio_attach_args *ja = aux;
     82 
     83 	/* Always present. */
     84 	if (strcmp(ja->ja_name, match->cf_name) == 0)
     85 		return (1);
     86 
     87 	return (0);
     88 }
     89 
     90 void
     91 com_jensenio_attach(device_t parent, device_t self, void *aux)
     92 {
     93 	struct com_jensenio_softc *jsc = device_private(self);
     94 	struct com_softc *sc = &jsc->sc_com;
     95 	struct jensenio_attach_args *ja = aux;
     96 	bus_space_handle_t ioh;
     97 
     98 	sc->sc_dev = self;
     99 	if (com_is_console(ja->ja_iot, ja->ja_ioaddr, &ioh) == 0 &&
    100 	    bus_space_map(ja->ja_iot, ja->ja_ioaddr, COM_NPORTS, 0,
    101 		&ioh) != 0) {
    102 		aprint_error(": can't map i/o space\n");
    103 		return;
    104 	}
    105 	com_init_regs(&sc->sc_regs, ja->ja_iot, ioh, ja->ja_ioaddr);
    106 
    107 	sc->sc_frequency = COM_FREQ;
    108 
    109 	/*
    110 	 * According to comments in Linux drivers/tty/serial/8250/8250.h,
    111 	 * the driver has to set OUT1 and OUT2 lines for "some ALPHA"
    112 	 * otherwise "the machine locks up with endless interrupts."
    113 	 * Note OUT2 (MCR_IENABLE) is set in MI com_attach_subr()
    114 	 * so we have to set OUT1 (MCR_DSR) in the MD attachment.
    115 	 * See also PR/36628.
    116 	 */
    117 	SET(sc->sc_mcr, MCR_DRS);
    118 
    119 	com_attach_subr(sc);
    120 
    121 	scb_set(ja->ja_irq[0], com_jensenio_intr, jsc, IPL_VM);
    122 	aprint_normal_dev(self, "interrupting at vector 0x%x\n",
    123 	    ja->ja_irq[0]);
    124 
    125 	snprintf(jsc->sc_vecstr, sizeof(jsc->sc_vecstr), "0x%x", ja->ja_irq[0]);
    126 	evcnt_attach_dynamic(&jsc->sc_ev_intr, EVCNT_TYPE_INTR,
    127 	    NULL, "vector", jsc->sc_vecstr);
    128 
    129 	if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
    130 		aprint_error_dev(self, "could not establish shutdown hook");
    131 	}
    132 }
    133 
    134 void
    135 com_jensenio_intr(void *arg, u_long vec)
    136 {
    137 	struct com_jensenio_softc *jsc = arg;
    138 
    139 	jsc->sc_ev_intr.ev_count++;
    140 	(void) comintr(&jsc->sc_com);
    141 }
    142