Home | History | Annotate | Line # | Download | only in dev
aupsc.c revision 1.2
      1  1.2  shige /* $NetBSD: aupsc.c,v 1.2 2006/03/06 17:15:03 shige Exp $ */
      2  1.1  shige 
      3  1.1  shige /*-
      4  1.1  shige  * Copyright (c) 2006 Shigeyuki Fukushima.
      5  1.1  shige  * All rights reserved.
      6  1.1  shige  *
      7  1.1  shige  * Written by Shigeyuki Fukushima.
      8  1.1  shige  *
      9  1.1  shige  * Redistribution and use in source and binary forms, with or without
     10  1.1  shige  * modification, are permitted provided that the following conditions
     11  1.1  shige  * are met:
     12  1.1  shige  * 1. Redistributions of source code must retain the above copyright
     13  1.1  shige  *    notice, this list of conditions and the following disclaimer.
     14  1.1  shige  * 2. Redistributions in binary form must reproduce the above
     15  1.1  shige  *    copyright notice, this list of conditions and the following
     16  1.1  shige  *    disclaimer in the documentation and/or other materials provided
     17  1.1  shige  *    with the distribution.
     18  1.1  shige  * 3. The name of the author may not be used to endorse or promote
     19  1.1  shige  *    products derived from this software without specific prior
     20  1.1  shige  *    written permission.
     21  1.1  shige  *
     22  1.1  shige  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     23  1.1  shige  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     24  1.1  shige  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  1.1  shige  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     26  1.1  shige  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  1.1  shige  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     28  1.1  shige  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     29  1.1  shige  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     30  1.1  shige  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     31  1.1  shige  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     32  1.1  shige  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  1.1  shige  */
     34  1.1  shige 
     35  1.1  shige #include <sys/cdefs.h>
     36  1.2  shige __KERNEL_RCSID(0, "$NetBSD: aupsc.c,v 1.2 2006/03/06 17:15:03 shige Exp $");
     37  1.1  shige 
     38  1.1  shige #include "locators.h"
     39  1.1  shige 
     40  1.1  shige #include <sys/param.h>
     41  1.1  shige #include <sys/systm.h>
     42  1.1  shige #include <sys/device.h>
     43  1.1  shige #include <sys/errno.h>
     44  1.1  shige 
     45  1.1  shige #include <machine/bus.h>
     46  1.1  shige #include <machine/cpu.h>
     47  1.1  shige 
     48  1.1  shige #include <mips/alchemy/include/aubusvar.h>
     49  1.1  shige #include <mips/alchemy/include/aureg.h>
     50  1.1  shige #include <mips/alchemy/dev/aupscreg.h>
     51  1.1  shige #include <mips/alchemy/dev/aupscvar.h>
     52  1.2  shige #include <mips/alchemy/dev/smbusreg.h>
     53  1.1  shige 
     54  1.1  shige struct aupsc_softc {
     55  1.1  shige 	struct device		sc_dev;
     56  1.1  shige 	bus_space_tag_t		sc_bust;
     57  1.1  shige 	bus_space_handle_t	sc_bush;
     58  1.1  shige 	int			sc_pscsel;
     59  1.1  shige };
     60  1.1  shige 
     61  1.1  shige const struct aupsc_proto {
     62  1.1  shige 	const char *name;
     63  1.2  shige 	int protocol;
     64  1.2  shige 	int statreg;
     65  1.2  shige 	int statbit;
     66  1.1  shige } aupsc_protos [] = {
     67  1.2  shige 	{ "ausmbus", AUPSC_SEL_SMBUS, AUPSC_SMBSTAT, SMBUS_STAT_SR },
     68  1.1  shige #if 0
     69  1.1  shige 	{ "auaudio" },
     70  1.1  shige 	{ "aui2s" },
     71  1.1  shige 	{ "ausmbus" },
     72  1.1  shige 	{ "auspi" },
     73  1.1  shige #endif
     74  1.2  shige 	{ NULL, AUPSC_SEL_DISABLE, 0, 0 }
     75  1.1  shige };
     76  1.1  shige 
     77  1.1  shige static int	aupsc_match(struct device *, struct cfdata *, void *);
     78  1.1  shige static void	aupsc_attach(struct device *, struct device *, void *);
     79  1.2  shige static int	aupsc_submatch(struct device *, struct cfdata *, const int *,
     80  1.2  shige 				void *);
     81  1.2  shige static int	aupsc_print(void *, const char *);
     82  1.2  shige 
     83  1.2  shige static void	aupsc_enable(void *, int);
     84  1.2  shige static void	aupsc_disable(void *);
     85  1.2  shige static void	aupsc_suspend(void *);
     86  1.2  shige 
     87  1.1  shige 
     88  1.1  shige CFATTACH_DECL(aupsc, sizeof(struct aupsc_softc),
     89  1.1  shige 	aupsc_match, aupsc_attach, NULL, NULL);
     90  1.1  shige 
     91  1.1  shige static int
     92  1.1  shige aupsc_match(struct device *parent, struct cfdata *cf, void *aux)
     93  1.1  shige {
     94  1.1  shige 	struct aubus_attach_args *aa = (struct aubus_attach_args *)aux;
     95  1.1  shige 
     96  1.1  shige 	if (strcmp(aa->aa_name, cf->cf_name) != 0)
     97  1.1  shige 		return 0;
     98  1.1  shige 
     99  1.1  shige 	return 1;
    100  1.1  shige }
    101  1.1  shige 
    102  1.1  shige static void
    103  1.1  shige aupsc_attach(struct device *parent, struct device *self, void *aux)
    104  1.1  shige {
    105  1.1  shige 	int i;
    106  1.1  shige 	uint32_t rv;
    107  1.1  shige 	struct aupsc_softc *sc = (struct aupsc_softc *)self;
    108  1.1  shige 	struct aubus_attach_args *aa = (struct aubus_attach_args *)aux;
    109  1.1  shige 	struct aupsc_attach_args pa;
    110  1.2  shige 	struct aupsc_controller ctrl;
    111  1.1  shige 
    112  1.1  shige 	sc->sc_bust = aa->aa_st;
    113  1.1  shige 	if (bus_space_map(sc->sc_bust, aa->aa_addr,
    114  1.1  shige 			AUPSC_SIZE, 0, &sc->sc_bush) != 0) {
    115  1.1  shige 		aprint_normal(": unable to map device registers\n");
    116  1.1  shige 		return;
    117  1.1  shige 	}
    118  1.1  shige 
    119  1.1  shige 	/* Initialize PSC_SEL register */
    120  1.1  shige 	sc->sc_pscsel = AUPSC_SEL_DISABLE;
    121  1.1  shige 	rv = bus_space_read_4(sc->sc_bust, sc->sc_bush, AUPSC_SEL);
    122  1.1  shige 	bus_space_write_4(sc->sc_bust, sc->sc_bush,
    123  1.1  shige 		AUPSC_SEL, (rv & AUPSC_SEL_PS(AUPSC_SEL_DISABLE)));
    124  1.2  shige 	bus_space_write_4(sc->sc_bust, sc->sc_bush,
    125  1.2  shige 		AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_DISABLE));
    126  1.1  shige 
    127  1.1  shige 	aprint_normal(": Alchemy PSC\n");
    128  1.1  shige 
    129  1.2  shige 	ctrl.psc_bust = sc->sc_bust;
    130  1.2  shige 	ctrl.psc_bush = sc->sc_bush;
    131  1.2  shige 	ctrl.psc_sel = &(sc->sc_pscsel);
    132  1.2  shige 	ctrl.psc_enable = aupsc_enable;
    133  1.2  shige 	ctrl.psc_disable = aupsc_disable;
    134  1.2  shige 	ctrl.psc_suspend = aupsc_suspend;
    135  1.2  shige 	pa.aupsc_ctrl = ctrl;
    136  1.2  shige 
    137  1.1  shige 	for (i = 0 ; aupsc_protos[i].name != NULL ; i++) {
    138  1.2  shige 		struct aupsc_protocol_device p;
    139  1.2  shige 		uint32_t s;
    140  1.2  shige 
    141  1.1  shige 		pa.aupsc_name = aupsc_protos[i].name;
    142  1.1  shige 
    143  1.2  shige 		p.sc_dev = sc->sc_dev;
    144  1.2  shige 		p.sc_ctrl = ctrl;
    145  1.2  shige 
    146  1.2  shige 		aupsc_enable(&p, aupsc_protos[i].protocol);
    147  1.2  shige 		s = bus_space_read_4(sc->sc_bust, sc->sc_bush,
    148  1.2  shige 			aupsc_protos[i].statreg);
    149  1.2  shige 		aupsc_disable(&p);
    150  1.2  shige 
    151  1.2  shige 		if (s & aupsc_protos[i].statbit) {
    152  1.2  shige 			(void) config_found_sm_loc(self, "aupsc", NULL,
    153  1.2  shige 				&pa, aupsc_print, aupsc_submatch);
    154  1.2  shige 		}
    155  1.1  shige         }
    156  1.1  shige }
    157  1.1  shige 
    158  1.1  shige static int
    159  1.1  shige aupsc_submatch(struct device *parent, struct cfdata *cf,
    160  1.1  shige 	const int *ldesc, void *aux)
    161  1.1  shige {
    162  1.1  shige 
    163  1.1  shige 	return config_match(parent, cf, aux);
    164  1.1  shige }
    165  1.1  shige 
    166  1.1  shige static int
    167  1.1  shige aupsc_print(void *aux, const char *pnp)
    168  1.1  shige {
    169  1.1  shige 	struct aupsc_attach_args *pa = aux;
    170  1.1  shige 
    171  1.1  shige 	if (pnp)
    172  1.1  shige 		aprint_normal("%s at %s", pa->aupsc_name, pnp);
    173  1.1  shige 
    174  1.1  shige 	return UNCONF;
    175  1.1  shige }
    176  1.2  shige 
    177  1.2  shige static void
    178  1.2  shige aupsc_enable(void *arg, int proto)
    179  1.2  shige {
    180  1.2  shige 	struct aupsc_protocol_device *sc = arg;
    181  1.2  shige 
    182  1.2  shige 	/* XXX: (TODO) setting clock AUPSC_SEL_CLK */
    183  1.2  shige 	switch (proto) {
    184  1.2  shige 	case AUPSC_SEL_SPI:
    185  1.2  shige 	case AUPSC_SEL_I2S:
    186  1.2  shige 	case AUPSC_SEL_AC97:
    187  1.2  shige 	case AUPSC_SEL_SMBUS:
    188  1.2  shige 		break;
    189  1.2  shige 	case AUPSC_SEL_DISABLE:
    190  1.2  shige 		aupsc_disable(arg);
    191  1.2  shige 		break;
    192  1.2  shige 	default:
    193  1.2  shige 		printf("%s: aupsc_enable: unsupported protocol.\n",
    194  1.2  shige 			sc->sc_dev.dv_xname);
    195  1.2  shige 		return;
    196  1.2  shige 	}
    197  1.2  shige 
    198  1.2  shige 	if (*(sc->sc_ctrl.psc_sel) != AUPSC_SEL_DISABLE) {
    199  1.2  shige 		printf("%s: aupsc_enable: please disable first.\n",
    200  1.2  shige 			sc->sc_dev.dv_xname);
    201  1.2  shige 		return;
    202  1.2  shige 	}
    203  1.2  shige 
    204  1.2  shige 	bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
    205  1.2  shige 			AUPSC_SEL, AUPSC_SEL_PS(proto));
    206  1.2  shige 	bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
    207  1.2  shige 			AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_ENABLE));
    208  1.2  shige 	delay(1);
    209  1.2  shige }
    210  1.2  shige 
    211  1.2  shige static void
    212  1.2  shige aupsc_disable(void *arg)
    213  1.2  shige {
    214  1.2  shige 	struct aupsc_protocol_device *sc = arg;
    215  1.2  shige 
    216  1.2  shige 	bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
    217  1.2  shige 			AUPSC_SEL, AUPSC_SEL_PS(AUPSC_SEL_DISABLE));
    218  1.2  shige 	bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
    219  1.2  shige 			AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_DISABLE));
    220  1.2  shige 	delay(1);
    221  1.2  shige }
    222  1.2  shige 
    223  1.2  shige static void
    224  1.2  shige aupsc_suspend(void *arg)
    225  1.2  shige {
    226  1.2  shige 	struct aupsc_protocol_device *sc = arg;
    227  1.2  shige 
    228  1.2  shige 	bus_space_write_4(sc->sc_ctrl.psc_bust, sc->sc_ctrl.psc_bush,
    229  1.2  shige 			AUPSC_CTRL, AUPSC_CTRL_ENA(AUPSC_CTRL_SUSPEND));
    230  1.2  shige 	delay(1);
    231  1.2  shige }
    232