1/* $NetBSD: auxio.c,v 1.27 2023/12/20 05:33:58 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 2000, 2001, 2015 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29/* 30 * AUXIO registers support on the sbus & ebus2, used for the floppy driver 31 * and to control the system LED, for the BLINK option. 32 */ 33 34#include <sys/cdefs.h> 35__KERNEL_RCSID(0, "$NetBSD: auxio.c,v 1.27 2023/12/20 05:33:58 thorpej Exp $"); 36 37#include "opt_auxio.h" 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/kernel.h> 42#include <sys/callout.h> 43#include <sys/errno.h> 44#include <sys/device.h> 45 46#include <machine/autoconf.h> 47#include <machine/cpu.h> 48 49#include <dev/ebus/ebusreg.h> 50#include <dev/ebus/ebusvar.h> 51#include <dev/sbus/sbusvar.h> 52#include <sparc64/dev/auxioreg.h> 53#include <sparc64/dev/auxiovar.h> 54 55static uint32_t auxio_read_led(struct auxio_softc *); 56static void auxio_write_led(struct auxio_softc *, uint32_t); 57void auxio_attach_common(struct auxio_softc *); 58 59extern struct cfdriver auxio_cd; 60 61static __inline__ uint32_t 62auxio_read_led(struct auxio_softc *sc) 63{ 64 uint32_t led; 65 66 if (sc->sc_flags & AUXIO_EBUS) 67 led = le32toh(bus_space_read_4(sc->sc_tag, sc->sc_led, 0)); 68 else 69 led = bus_space_read_1(sc->sc_tag, sc->sc_led, 0); 70 71 return led; 72} 73 74static __inline__ void 75auxio_write_led(struct auxio_softc *sc, uint32_t led) 76{ 77 78 if (sc->sc_flags & AUXIO_EBUS) 79 bus_space_write_4(sc->sc_tag, sc->sc_led, 0, htole32(led)); 80 else 81 bus_space_write_1(sc->sc_tag, sc->sc_led, 0, led); 82} 83 84#ifdef BLINK 85static callout_t blink_ch; 86static void auxio_blink(void *); 87 88/* let someone disable it if it's already turned on; XXX sysctl? */ 89int do_blink = 1; 90 91static void 92auxio_blink(void *x) 93{ 94 struct auxio_softc *sc = x; 95 int s; 96 uint32_t led; 97 98 if (do_blink == 0) 99 return; 100 101 mutex_enter(&sc->sc_lock); 102 led = auxio_read_led(sc); 103 led = led ^ AUXIO_LED_LED; 104 auxio_write_led(sc, led); 105 mutex_exit(&sc->sc_lock); 106 107 /* 108 * Blink rate is: 109 * full cycle every second if completely idle (loadav = 0) 110 * full cycle every 2 seconds if loadav = 1 111 * full cycle every 3 seconds if loadav = 2 112 * etc. 113 */ 114 s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1)); 115 callout_reset(&blink_ch, s, auxio_blink, sc); 116} 117#endif 118 119void 120auxio_attach_common(struct auxio_softc *sc) 121{ 122 static int do_once = 1; 123 124 /* only start one blinker */ 125 if (do_once) { 126 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_HIGH); 127#ifdef BLINK 128 callout_init(&blink_ch, CALLOUT_MPSAFE); 129 auxio_blink(sc); 130#endif 131 do_once = 0; 132 } 133 printf("\n"); 134} 135 136int 137auxio_fd_control(u_int32_t bits) 138{ 139 struct auxio_softc *sc; 140 u_int32_t led; 141 142 if (auxio_cd.cd_ndevs == 0) { 143 return ENXIO; 144 } 145 146 /* 147 * XXX This does not handle > 1 auxio correctly. 148 * We'll assume the floppy drive is tied to first auxio found. 149 */ 150 sc = device_lookup_private(&auxio_cd, 0); 151 if (!sc) { 152 return ENXIO; 153 } 154 155 mutex_enter(&sc->sc_lock); 156 led = auxio_read_led(sc); 157 led = (led & ~AUXIO_LED_FLOPPY_MASK) | bits; 158 auxio_write_led(sc, led); 159 mutex_exit(&sc->sc_lock); 160 161 return 0; 162} 163