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      1 /* $NetBSD: pl041.c,v 1.8 2020/02/29 05:51:11 isaki Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca>
      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 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: pl041.c,v 1.8 2020/02/29 05:51:11 isaki Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 #include <sys/kmem.h>
     36 #include <sys/bus.h>
     37 #include <sys/audioio.h>
     38 
     39 #include <dev/audio/audio_if.h>
     40 
     41 #include <dev/ic/ac97var.h>
     42 #include <dev/ic/ac97reg.h>
     43 
     44 #include <dev/ic/pl041var.h>
     45 
     46 #define	AACIRXCR		0x00
     47 #define	AACITXCR		0x04
     48 #define	 AACITXCR_TXFEN		__BIT(16)
     49 #define	 AACITXCR_TXCM		__BIT(15)
     50 #define	 AACITXCR_TSIZE		__BITS(14,13)
     51 #define	  AACITXCR_TSIZE_16	__SHIFTIN(0, AACITXCR_TSIZE)
     52 #define	  AACITXCR_TX(n)	__BIT(n)
     53 #define	 AACITXCR_TXEN		__BIT(0)
     54 #define	AACISR			0x08
     55 #define	 AACISR_TXFF		__BIT(5)
     56 #define	 AACISR_TXHE		__BIT(3)
     57 #define	AACIISR			0x0c
     58 #define	 AACIISR_URINTR		__BIT(5)
     59 #define	 AACIISR_TXINTR		__BIT(2)
     60 #define	AACIIE			0x10
     61 #define	 AACIIE_TXUIE		__BIT(5)
     62 #define	 AACIIE_TXIE		__BIT(2)
     63 #define	AACISL1RX		0x50
     64 #define	AACISL1TX		0x54
     65 #define	AACISL2RX		0x58
     66 #define	AACISL2TX		0x5c
     67 #define	AACISLFR		0x68
     68 #define	AACISLISTAT		0x6c
     69 #define	AACISLIEN		0x70
     70 #define	AACIINTCLR		0x74
     71 #define	AACIMAINCR		0x78
     72 #define	AACIRESET		0x7c
     73 #define	AACISYNC		0x80
     74 #define	AACIALLINTS		0x84
     75 #define	AACIMAINFR		0x88
     76 #define	AACIDR			0x90
     77 
     78 #define	AACI_FIFO_DEPTH		512
     79 
     80 #define	AACI_READ(sc, reg)			\
     81 	bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
     82 #define	AACI_WRITE(sc, reg, val)		\
     83 	bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
     84 #define	AACI_WRITE_MULTI(sc, reg, val, cnt)	\
     85 	bus_space_write_multi_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val), (cnt))
     86 
     87 static const struct audio_format aaci_format = {
     88 	.mode = AUMODE_PLAY,
     89 	.encoding = AUDIO_ENCODING_SLINEAR_LE,
     90 	.validbits = 16,
     91 	.precision = 16,
     92 	.channels = 2,
     93 	.channel_mask = AUFMT_STEREO,
     94 	.frequency_type = 1,
     95 	.frequency = { 48000 }
     96 };
     97 
     98 static void
     99 aaci_write_data(struct aaci_softc *sc)
    100 {
    101 	KASSERT(mutex_owned(&sc->sc_intr_lock));
    102 
    103 	if (sc->sc_pint == NULL)
    104 		return;
    105 
    106 	while ((AACI_READ(sc, AACISR) & AACISR_TXHE) != 0) {
    107 		const int len = uimin(AACI_FIFO_DEPTH / 2, uimin(sc->sc_pblkresid,
    108 		    (uintptr_t)sc->sc_pend - (uintptr_t)sc->sc_pcur));
    109 		KASSERT((len & 3) == 0);
    110 		AACI_WRITE_MULTI(sc, AACIDR, sc->sc_pcur, len >> 2);
    111 		sc->sc_pcur += (len >> 2);
    112 		if (sc->sc_pcur == sc->sc_pend)
    113 			sc->sc_pcur = sc->sc_pstart;
    114 		sc->sc_pblkresid -= len;
    115 		if (sc->sc_pblkresid == 0) {
    116 			sc->sc_pblkresid = sc->sc_pblksize;
    117 			sc->sc_pint(sc->sc_pintarg);
    118 		}
    119 	}
    120 }
    121 
    122 static int
    123 aaci_query_format(void *priv, audio_format_query_t *afp)
    124 {
    125 
    126 	return audio_query_format(&aaci_format, 1, afp);
    127 }
    128 
    129 static int
    130 aaci_set_format(void *priv, int setmode,
    131     const audio_params_t *play, const audio_params_t *rec,
    132     audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
    133 {
    134 
    135 	/* We have only one format so nothing to do here. */
    136 	return 0;
    137 }
    138 
    139 static int
    140 aaci_getdev(void *priv, struct audio_device *audiodev)
    141 {
    142 	snprintf(audiodev->name, sizeof(audiodev->name), "ARM");
    143 	snprintf(audiodev->version, sizeof(audiodev->version),
    144 	    "PrimeCell AACI");
    145 	snprintf(audiodev->config, sizeof(audiodev->config), "aaci");
    146 	return 0;
    147 }
    148 
    149 static int
    150 aaci_set_port(void *priv, mixer_ctrl_t *mc)
    151 {
    152 	struct aaci_softc * const sc = priv;
    153 
    154 	return sc->sc_ac97_codec->vtbl->mixer_set_port(sc->sc_ac97_codec, mc);
    155 }
    156 
    157 static int
    158 aaci_get_port(void *priv, mixer_ctrl_t *mc)
    159 {
    160 	struct aaci_softc * const sc = priv;
    161 
    162 	return sc->sc_ac97_codec->vtbl->mixer_get_port(sc->sc_ac97_codec, mc);
    163 }
    164 
    165 static int
    166 aaci_query_devinfo(void *priv, mixer_devinfo_t *di)
    167 {
    168 	struct aaci_softc * const sc = priv;
    169 
    170 	return sc->sc_ac97_codec->vtbl->query_devinfo(sc->sc_ac97_codec, di);
    171 }
    172 
    173 static int
    174 aaci_get_props(void *priv)
    175 {
    176 	return AUDIO_PROP_PLAYBACK;
    177 }
    178 
    179 static int
    180 aaci_trigger_output(void *priv, void *start, void *end, int blksize,
    181     void (*intr)(void *), void *intrarg, const audio_params_t *params)
    182 {
    183 	struct aaci_softc * const sc = priv;
    184 
    185 	sc->sc_pcur = start;
    186 	sc->sc_pstart = start;
    187 	sc->sc_pend = end;
    188 	sc->sc_pblksize = blksize;
    189 	sc->sc_pblkresid = blksize;
    190 	sc->sc_pint = intr;
    191 	sc->sc_pintarg = intrarg;
    192 
    193 	AACI_WRITE(sc, AACIIE, AACIIE_TXIE | AACIIE_TXUIE);
    194 	AACI_WRITE(sc, AACITXCR, AACITXCR_TXFEN | AACITXCR_TXEN |
    195 	    AACITXCR_TXCM | AACITXCR_TSIZE_16 |
    196 	    AACITXCR_TX(AC97_SLOT_PCM_L) | AACITXCR_TX(AC97_SLOT_PCM_R));
    197 
    198 	return 0;
    199 }
    200 
    201 static int
    202 aaci_halt_output(void *priv)
    203 {
    204 	struct aaci_softc * const sc = priv;
    205 
    206 	sc->sc_pint = NULL;
    207 
    208 	AACI_WRITE(sc, AACITXCR, 0);
    209 	AACI_WRITE(sc, AACIIE, 0);
    210 
    211 	return 0;
    212 }
    213 
    214 static void
    215 aaci_get_locks(void *priv, kmutex_t **intr, kmutex_t **thread)
    216 {
    217 	struct aaci_softc * const sc = priv;
    218 
    219 	*intr = &sc->sc_intr_lock;
    220 	*thread = &sc->sc_lock;
    221 }
    222 
    223 static const struct audio_hw_if aaci_hw_if = {
    224 	.query_format = aaci_query_format,
    225 	.set_format = aaci_set_format,
    226 	.getdev = aaci_getdev,
    227 	.set_port = aaci_set_port,
    228 	.get_port = aaci_get_port,
    229 	.query_devinfo = aaci_query_devinfo,
    230 	.get_props = aaci_get_props,
    231 	.trigger_output = aaci_trigger_output,
    232 	.halt_output = aaci_halt_output,
    233 	.get_locks = aaci_get_locks,
    234 };
    235 
    236 static int
    237 aaci_ac97_attach(void *priv, struct ac97_codec_if *codec)
    238 {
    239 	struct aaci_softc * const sc = priv;
    240 
    241 	sc->sc_ac97_codec = codec;
    242 
    243 	return 0;
    244 }
    245 
    246 static int
    247 aaci_ac97_read(void *priv, uint8_t reg, uint16_t *val)
    248 {
    249 	struct aaci_softc * const sc = priv;
    250 
    251 	AACI_WRITE(sc, AACISL1TX, (reg << 12) | (1 << 19));
    252 
    253 	if (AACI_READ(sc, AACISL1RX) != (reg << 12))
    254 		return 1;
    255 
    256 	*val = AACI_READ(sc, AACISL2RX) >> 4;
    257 	return 0;
    258 }
    259 
    260 static int
    261 aaci_ac97_write(void *priv, uint8_t reg, uint16_t val)
    262 {
    263 	struct aaci_softc * const sc = priv;
    264 
    265 	AACI_WRITE(sc, AACISL2TX, val << 4);
    266 	AACI_WRITE(sc, AACISL1TX, (reg << 12) | (0 << 19));
    267 
    268 	return 0;
    269 }
    270 
    271 void
    272 aaci_attach(struct aaci_softc *sc)
    273 {
    274 	int error;
    275 
    276 	aprint_naive("\n");
    277 	aprint_normal(": Advanced Audio CODEC\n");
    278 
    279 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    280 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);
    281 
    282 	sc->sc_ac97_host.arg = sc;
    283 	sc->sc_ac97_host.attach = aaci_ac97_attach;
    284 	sc->sc_ac97_host.read = aaci_ac97_read;
    285 	sc->sc_ac97_host.write = aaci_ac97_write;
    286 	error = ac97_attach(&sc->sc_ac97_host, sc->sc_dev, &sc->sc_lock);
    287 	if (error) {
    288 		aprint_error_dev(sc->sc_dev, "couldn't attach codec (%d)\n",
    289 		    error);
    290 		return;
    291 	}
    292 
    293 	sc->sc_audiodev = audio_attach_mi(&aaci_hw_if, sc, sc->sc_dev);
    294 }
    295 
    296 int
    297 aaci_intr(void *priv)
    298 {
    299 	struct aaci_softc * const sc = priv;
    300 	uint32_t isr;
    301 
    302 	if (sc->sc_audiodev == NULL)
    303 		return 0;
    304 
    305 	isr = AACI_READ(sc, AACIISR);
    306 
    307 	if (isr & AACIISR_URINTR)
    308 		AACI_WRITE(sc, AACIINTCLR, AACIISR_URINTR);
    309 
    310 	if (isr & AACIISR_TXINTR) {
    311 		mutex_enter(&sc->sc_intr_lock);
    312 		if (sc->sc_pint == NULL)
    313 			AACI_WRITE(sc, AACIIE, 0);
    314 		aaci_write_data(sc);
    315 		mutex_exit(&sc->sc_intr_lock);
    316 	}
    317 
    318 	return 1;
    319 }
    320