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      1 /*	$NetBSD: auxiotwo.c,v 1.11 2012/07/29 00:04:05 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      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 /*
     33  * Based on software developed by the Computer Systems Engineering group
     34  * at Lawrence Berkeley Laboratory.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: auxiotwo.c,v 1.11 2012/07/29 00:04:05 matt Exp $");
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 #include <sys/kernel.h>
     44 
     45 #include <machine/autoconf.h>
     46 
     47 #include <sparc/include/tctrl.h>
     48 #include <sparc/sparc/auxiotwo.h>
     49 #include <sparc/sparc/vaddrs.h>
     50 
     51 volatile u_char *auxiotwo_reg;
     52 u_char auxiotwo_regval;
     53 
     54 static int serial_refcount;
     55 static int serial_power;
     56 
     57 static int auxiotwomatch(device_t, cfdata_t, void *);
     58 static void auxiotwoattach(device_t, device_t, void *);
     59 
     60 CFATTACH_DECL_NEW(auxiotwo_obio, 0,
     61      auxiotwomatch, auxiotwoattach, NULL, NULL);
     62 
     63 /*
     64  * The OPENPROM calls this "auxio2".
     65  */
     66 static int
     67 auxiotwomatch(device_t parent, cfdata_t cf, void *aux)
     68 {
     69 	union obio_attach_args *uoba = aux;
     70 
     71 	if (uoba->uoba_isobio4 != 0)
     72 		return (0);
     73 
     74 	return (strcmp("auxio2", uoba->uoba_sbus.sa_name) == 0);
     75 }
     76 
     77 static void
     78 auxiotwoattach(device_t parent, device_t self, void *aux)
     79 {
     80 	union obio_attach_args *uoba = aux;
     81 	struct sbus_attach_args *sa = &uoba->uoba_sbus;
     82 	bus_space_handle_t bh;
     83 
     84 	if (sbus_bus_map(sa->sa_bustag,
     85 			 sa->sa_slot, sa->sa_offset,
     86 			 sizeof(long),
     87 			 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
     88 		printf("auxiotwoattach: can't map register\n");
     89 		return;
     90 	}
     91 
     92 	auxiotwo_reg = (volatile u_char *)bh;
     93 	auxiotwo_regval = *auxiotwo_reg;
     94 	serial_refcount = 0;
     95 	serial_power = PORT_PWR_STANDBY;
     96 	printf("\n");
     97 }
     98 
     99 unsigned int
    100 auxiotwobisc(int bis, int bic)
    101 {
    102 	register int s;
    103 
    104 	if (auxiotwo_reg == 0)
    105 		/*
    106 		 * Most machines do not have an `aux2' register; devices that
    107 		 * depend on it should not get configured if it's absent.
    108 		 */
    109 		panic("no aux2 register");
    110 
    111 	s = splhigh();
    112 	auxiotwo_regval = (auxiotwo_regval | bis) & ~bic;
    113 	*auxiotwo_reg = auxiotwo_regval;
    114 	splx(s);
    115 	return (auxiotwo_regval);
    116 }
    117 
    118 /*
    119  * Serial port state - called from zs_enable()/zs_disable()
    120  */
    121 void
    122 auxiotwoserialendis(int state)
    123 {
    124 	switch (state) {
    125 
    126 	case ZS_ENABLE:
    127 		/* Power on the serial ports? */
    128 		serial_refcount++;
    129 		if (serial_refcount == 1 && serial_power == PORT_PWR_STANDBY)
    130 			auxiotwobisc(AUXIOTWO_SON, 0);
    131 		break;
    132 	case ZS_DISABLE:
    133 		/* Power off the serial ports? */
    134 		serial_refcount--;
    135 		if (!serial_refcount && serial_power == PORT_PWR_STANDBY)
    136 			auxiotwobisc(AUXIOTWO_SOF, 1);
    137 		break;
    138 	}
    139 }
    140 
    141 /*
    142  * Set power management - called by tctrl
    143  */
    144 void
    145 auxiotwoserialsetapm(int state)
    146 {
    147 	switch (state) {
    148 
    149 	case PORT_PWR_ON:
    150 		/* Change to: power always on */
    151 		if (serial_power == PORT_PWR_OFF ||
    152 		    (serial_power == PORT_PWR_STANDBY && !serial_refcount))
    153 			auxiotwobisc(AUXIOTWO_SON, 0);
    154 		serial_power = PORT_PWR_ON;
    155 		break;
    156 
    157 	case PORT_PWR_STANDBY:
    158 		/* Change to: power on if open */
    159 		if (serial_power == PORT_PWR_ON && !serial_refcount)
    160 			auxiotwobisc(AUXIOTWO_SOF, 1);
    161 		if (serial_power == PORT_PWR_OFF && serial_refcount)
    162 			auxiotwobisc(AUXIOTWO_SON, 0);
    163 		serial_power = PORT_PWR_STANDBY;
    164 		break;
    165 
    166 	case PORT_PWR_OFF:
    167 		/* Change to: power always off */
    168 		if (serial_power == PORT_PWR_ON ||
    169 		    (serial_power == PORT_PWR_STANDBY && serial_refcount))
    170 			auxiotwobisc(AUXIOTWO_SOF, 1);
    171 		serial_power = PORT_PWR_OFF;
    172 		break;
    173 	}
    174 }
    175 
    176 /*
    177  * Get power management - called by tctrl
    178  */
    179 int
    180 auxiotwoserialgetapm (void)
    181 {
    182 
    183 	return (serial_power);
    184 }
    185