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auxio.c revision 1.19 
      1 /*	$NetBSD: auxio.c,v 1.19 2008/05/29 14:51:26 mrg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000, 2001 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 1.19 2008/05/29 14:51:26 mrg 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 #include <sys/malloc.h>
     46 
     47 #include <machine/autoconf.h>
     48 #include <machine/cpu.h>
     49 
     50 #include <dev/ebus/ebusreg.h>
     51 #include <dev/ebus/ebusvar.h>
     52 #include <sparc64/dev/sbusvar.h>
     53 #include <sparc64/dev/auxioreg.h>
     54 #include <sparc64/dev/auxiovar.h>
     55 
     56 /*
     57  * on sun4u, auxio exists with one register (LED) on the sbus, and 5
     58  * registers on the ebus2 (pci) (LED, PCIMODE, FREQUENCY, SCSI
     59  * OSCILLATOR, and TEMP SENSE.
     60  */
     61 
     62 struct auxio_softc {
     63 	struct device		sc_dev;
     64 
     65 	/* parent's tag */
     66 	bus_space_tag_t		sc_tag;
     67 
     68 	/* handles to the various auxio regsiter sets */
     69 	bus_space_handle_t	sc_led;
     70 	bus_space_handle_t	sc_pci;
     71 	bus_space_handle_t	sc_freq;
     72 	bus_space_handle_t	sc_scsi;
     73 	bus_space_handle_t	sc_temp;
     74 
     75 	int			sc_flags;
     76 #define	AUXIO_LEDONLY		0x1
     77 #define	AUXIO_EBUS		0x2
     78 #define	AUXIO_SBUS		0x4
     79 };
     80 
     81 #define	AUXIO_ROM_NAME		"auxio"
     82 
     83 void	auxio_attach_common(struct auxio_softc *);
     84 int	auxio_ebus_match(struct device *, struct cfdata *, void *);
     85 void	auxio_ebus_attach(struct device *, struct device *, void *);
     86 int	auxio_sbus_match(struct device *, struct cfdata *, void *);
     87 void	auxio_sbus_attach(struct device *, struct device *, void *);
     88 
     89 CFATTACH_DECL(auxio_ebus, sizeof(struct auxio_softc),
     90     auxio_ebus_match, auxio_ebus_attach, NULL, NULL);
     91 
     92 CFATTACH_DECL(auxio_sbus, sizeof(struct auxio_softc),
     93     auxio_sbus_match, auxio_sbus_attach, NULL, NULL);
     94 
     95 extern struct cfdriver auxio_cd;
     96 
     97 #ifdef BLINK
     98 static callout_t blink_ch;
     99 static void auxio_blink(void *);
    100 
    101 /* let someone disable it if it's already turned on; XXX sysctl? */
    102 int do_blink = 1;
    103 
    104 static void
    105 auxio_blink(void *x)
    106 {
    107 	struct auxio_softc *sc = x;
    108 	int s;
    109 	uint32_t led;
    110 
    111 	if (do_blink == 0)
    112 		return;
    113 
    114 	s = splhigh();
    115 	if (sc->sc_flags & AUXIO_EBUS)
    116 		led = le32toh(bus_space_read_4(sc->sc_tag, sc->sc_led, 0));
    117 	else
    118 		led = bus_space_read_1(sc->sc_tag, sc->sc_led, 0);
    119 
    120 	led = led ^ AUXIO_LED_LED;
    121 	if (sc->sc_flags & AUXIO_EBUS)
    122 		bus_space_write_4(sc->sc_tag, sc->sc_led, 0, htole32(led));
    123 	else
    124 		bus_space_write_1(sc->sc_tag, sc->sc_led, 0, led);
    125 	splx(s);
    126 
    127 	/*
    128 	 * Blink rate is:
    129 	 *	full cycle every second if completely idle (loadav = 0)
    130 	 *	full cycle every 2 seconds if loadav = 1
    131 	 *	full cycle every 3 seconds if loadav = 2
    132 	 * etc.
    133 	 */
    134 	s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
    135 	callout_reset(&blink_ch, s, auxio_blink, sc);
    136 }
    137 #endif
    138 
    139 void
    140 auxio_attach_common(struct auxio_softc *sc)
    141 {
    142 #ifdef BLINK
    143 	static int do_once = 1;
    144 
    145 	/* only start one blinker */
    146 	if (do_once) {
    147 		callout_init(&blink_ch, 0);
    148 		auxio_blink(sc);
    149 		do_once = 0;
    150 	}
    151 #endif
    152 	printf("\n");
    153 }
    154 
    155 int
    156 auxio_ebus_match(struct device *parent, struct cfdata *cf, void *aux)
    157 {
    158 	struct ebus_attach_args *ea = aux;
    159 
    160 	return (strcmp(AUXIO_ROM_NAME, ea->ea_name) == 0);
    161 }
    162 
    163 void
    164 auxio_ebus_attach(struct device *parent, struct device *self, void *aux)
    165 {
    166 	struct auxio_softc *sc = (struct auxio_softc *)self;
    167 	struct ebus_attach_args *ea = aux;
    168 
    169 	sc->sc_tag = ea->ea_bustag;
    170 
    171 	if (ea->ea_nreg < 1) {
    172 		printf(": no registers??\n");
    173 		return;
    174 	}
    175 
    176 	if (ea->ea_nreg != 5) {
    177 		printf(": not 5 (%d) registers, only setting led",
    178 		    ea->ea_nreg);
    179 		sc->sc_flags = AUXIO_LEDONLY|AUXIO_EBUS;
    180 	} else if (ea->ea_nvaddr == 5) {
    181 		sc->sc_flags = AUXIO_EBUS;
    182 
    183 		sparc_promaddr_to_handle(sc->sc_tag,
    184 			ea->ea_vaddr[1], &sc->sc_pci);
    185 		sparc_promaddr_to_handle(sc->sc_tag,
    186 			ea->ea_vaddr[2], &sc->sc_freq);
    187 		sparc_promaddr_to_handle(sc->sc_tag,
    188 			ea->ea_vaddr[3], &sc->sc_scsi);
    189 		sparc_promaddr_to_handle(sc->sc_tag,
    190 			ea->ea_vaddr[4], &sc->sc_temp);
    191 	} else {
    192 		sc->sc_flags = AUXIO_EBUS;
    193 		bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[1]),
    194 			ea->ea_reg[1].size, 0, &sc->sc_pci);
    195 		bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[2]),
    196 			ea->ea_reg[2].size, 0, &sc->sc_freq);
    197 		bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[3]),
    198 			ea->ea_reg[3].size, 0, &sc->sc_scsi);
    199 		bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[4]),
    200 			ea->ea_reg[4].size, 0, &sc->sc_temp);
    201 	}
    202 
    203 	if (ea->ea_nvaddr > 0) {
    204 		sparc_promaddr_to_handle(sc->sc_tag,
    205 			ea->ea_vaddr[0], &sc->sc_led);
    206 	} else {
    207 		bus_space_map(sc->sc_tag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
    208 			ea->ea_reg[0].size, 0, &sc->sc_led);
    209 	}
    210 
    211 	auxio_attach_common(sc);
    212 }
    213 
    214 int
    215 auxio_sbus_match(struct device *parent, struct cfdata *cf, void *aux)
    216 {
    217 	struct sbus_attach_args *sa = aux;
    218 
    219 	return (strcmp(AUXIO_ROM_NAME, sa->sa_name) == 0);
    220 }
    221 
    222 void
    223 auxio_sbus_attach(struct device *parent, struct device *self, void *aux)
    224 {
    225 	struct auxio_softc *sc = (struct auxio_softc *)self;
    226 	struct sbus_attach_args *sa = aux;
    227 
    228 	sc->sc_tag = sa->sa_bustag;
    229 
    230 	if (sa->sa_nreg < 1) {
    231 		printf(": no registers??\n");
    232 		return;
    233 	}
    234 
    235 	if (sa->sa_nreg != 1) {
    236 		printf(": not 1 (%d/%d) registers??", sa->sa_nreg,
    237 		    sa->sa_npromvaddrs);
    238 		return;
    239 	}
    240 
    241 	/* sbus auxio only has one set of registers */
    242 	sc->sc_flags = AUXIO_LEDONLY|AUXIO_SBUS;
    243 	if (sa->sa_npromvaddrs > 0) {
    244 		sbus_promaddr_to_handle(sc->sc_tag,
    245 			sa->sa_promvaddr, &sc->sc_led);
    246 	} else {
    247 		sbus_bus_map(sc->sc_tag, sa->sa_slot, sa->sa_offset,
    248 			sa->sa_size, 0, &sc->sc_led);
    249 	}
    250 
    251 	auxio_attach_common(sc);
    252 }
    253 
    254 int
    255 auxio_fd_control(u_int32_t bits)
    256 {
    257 	struct auxio_softc *sc;
    258 	u_int32_t led;
    259 
    260 	if (auxio_cd.cd_ndevs == 0) {
    261 		return ENXIO;
    262 	}
    263 
    264 	/*
    265 	 * XXX This does not handle > 1 auxio correctly.
    266 	 * We'll assume the floppy drive is tied to first auxio found.
    267 	 */
    268 	sc = (struct auxio_softc *)auxio_cd.cd_devs[0];
    269 	if (sc->sc_flags & AUXIO_EBUS)
    270 		led = le32toh(bus_space_read_4(sc->sc_tag, sc->sc_led, 0));
    271 	else
    272 		led = bus_space_read_1(sc->sc_tag, sc->sc_led, 0);
    273 
    274 	led = (led & ~AUXIO_LED_FLOPPY_MASK) | bits;
    275 
    276 	if (sc->sc_flags & AUXIO_EBUS)
    277 		bus_space_write_4(sc->sc_tag, sc->sc_led, 0, htole32(led));
    278 	else
    279 		bus_space_write_1(sc->sc_tag, sc->sc_led, 0, led);
    280 
    281 	return 0;
    282 }
    283