2 * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * Allwinner A10/A20 HDMI Audio
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
40 #include <sys/condvar.h>
41 #include <sys/kernel.h>
42 #include <sys/module.h>
44 #include <dev/sound/pcm/sound.h>
45 #include <dev/sound/chip.h>
47 #include <dev/ofw/ofw_bus.h>
48 #include <dev/ofw/ofw_bus_subr.h>
50 #include "sunxi_dma_if.h"
53 #define DRQTYPE_HDMIAUDIO 24
54 #define DRQTYPE_SDRAM 1
57 #define DMA_BURST_LEN 8
58 #define DDMA_BLKSIZE 32
59 #define DDMA_WAIT_CYC 8
61 #define DMABUF_MIN 4096
62 #define DMABUF_DEFAULT 65536
63 #define DMABUF_MAX 131072
65 #define HDMI_SAMPLERATE 48000
67 #define TX_FIFO 0x01c16400
69 static uint32_t a10hdmiaudio_fmt[] = {
70 SND_FORMAT(AFMT_S16_LE, 2, 0),
74 static struct pcmchan_caps a10hdmiaudio_pcaps = {
75 HDMI_SAMPLERATE, HDMI_SAMPLERATE, a10hdmiaudio_fmt, 0
78 struct a10hdmiaudio_info;
80 struct a10hdmiaudio_chinfo {
81 struct snd_dbuf *buffer;
82 struct pcm_channel *channel;
83 struct a10hdmiaudio_info *parent;
95 struct a10hdmiaudio_info {
101 struct a10hdmiaudio_chinfo play;
109 a10hdmiaudio_mixer_init(struct snd_mixer *m)
111 mix_setdevs(m, SOUND_MASK_PCM);
117 a10hdmiaudio_mixer_set(struct snd_mixer *m, unsigned dev, unsigned left,
123 static kobj_method_t a10hdmiaudio_mixer_methods[] = {
124 KOBJMETHOD(mixer_init, a10hdmiaudio_mixer_init),
125 KOBJMETHOD(mixer_set, a10hdmiaudio_mixer_set),
128 MIXER_DECLARE(a10hdmiaudio_mixer);
136 a10hdmiaudio_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
138 struct a10hdmiaudio_chinfo *ch = arg;
143 ch->physaddr = segs[0].ds_addr;
147 a10hdmiaudio_transfer(struct a10hdmiaudio_chinfo *ch)
151 error = SUNXI_DMA_TRANSFER(ch->dmac, ch->dmachan,
152 ch->physaddr + ch->pos, TX_FIFO, ch->blocksize);
155 device_printf(ch->parent->dev, "DMA transfer failed: %d\n",
161 a10hdmiaudio_dmaconfig(struct a10hdmiaudio_chinfo *ch)
163 struct sunxi_dma_config conf;
165 memset(&conf, 0, sizeof(conf));
166 conf.src_width = conf.dst_width = DMA_WIDTH;
167 conf.src_burst_len = conf.dst_burst_len = DMA_BURST_LEN;
168 conf.src_blksize = conf.dst_blksize = DDMA_BLKSIZE;
169 conf.src_wait_cyc = conf.dst_wait_cyc = DDMA_WAIT_CYC;
170 conf.src_drqtype = DRQTYPE_SDRAM;
171 conf.dst_drqtype = DRQTYPE_HDMIAUDIO;
172 conf.dst_noincr = true;
174 SUNXI_DMA_SET_CONFIG(ch->dmac, ch->dmachan, &conf);
178 a10hdmiaudio_dmaintr(void *priv)
180 struct a10hdmiaudio_chinfo *ch = priv;
183 bufsize = sndbuf_getsize(ch->buffer);
185 ch->pos += ch->blocksize;
186 if (ch->pos >= bufsize)
190 chn_intr(ch->channel);
191 a10hdmiaudio_transfer(ch);
196 a10hdmiaudio_start(struct a10hdmiaudio_chinfo *ch)
200 /* Configure DMA channel */
201 a10hdmiaudio_dmaconfig(ch);
203 /* Start DMA transfer */
204 a10hdmiaudio_transfer(ch);
208 a10hdmiaudio_stop(struct a10hdmiaudio_chinfo *ch)
210 /* Disable DMA channel */
211 SUNXI_DMA_HALT(ch->dmac, ch->dmachan);
215 a10hdmiaudio_chan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b,
216 struct pcm_channel *c, int dir)
218 struct a10hdmiaudio_info *sc = devinfo;
219 struct a10hdmiaudio_chinfo *ch = &sc->play;
226 ch->dmac = devclass_get_device(devclass_find("a10dmac"), 0);
227 if (ch->dmac == NULL) {
228 device_printf(sc->dev, "cannot find DMA controller\n");
231 ch->dmachan = SUNXI_DMA_ALLOC(ch->dmac, true, a10hdmiaudio_dmaintr, ch);
232 if (ch->dmachan == NULL) {
233 device_printf(sc->dev, "cannot allocate DMA channel\n");
237 error = bus_dmamem_alloc(sc->dmat, &ch->dmaaddr,
238 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &ch->dmamap);
240 device_printf(sc->dev, "cannot allocate channel buffer\n");
243 error = bus_dmamap_load(sc->dmat, ch->dmamap, ch->dmaaddr,
244 sc->dmasize, a10hdmiaudio_dmamap_cb, ch, BUS_DMA_NOWAIT);
246 device_printf(sc->dev, "cannot load DMA map\n");
249 memset(ch->dmaaddr, 0, sc->dmasize);
251 if (sndbuf_setup(ch->buffer, ch->dmaaddr, sc->dmasize) != 0) {
252 device_printf(sc->dev, "cannot setup sndbuf\n");
260 a10hdmiaudio_chan_free(kobj_t obj, void *data)
262 struct a10hdmiaudio_chinfo *ch = data;
263 struct a10hdmiaudio_info *sc = ch->parent;
265 SUNXI_DMA_FREE(ch->dmac, ch->dmachan);
266 bus_dmamap_unload(sc->dmat, ch->dmamap);
267 bus_dmamem_free(sc->dmat, ch->dmaaddr, ch->dmamap);
273 a10hdmiaudio_chan_setformat(kobj_t obj, void *data, uint32_t format)
279 a10hdmiaudio_chan_setspeed(kobj_t obj, void *data, uint32_t speed)
281 return (HDMI_SAMPLERATE);
285 a10hdmiaudio_chan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
287 struct a10hdmiaudio_chinfo *ch = data;
289 ch->blocksize = blocksize & ~3;
291 return (ch->blocksize);
295 a10hdmiaudio_chan_trigger(kobj_t obj, void *data, int go)
297 struct a10hdmiaudio_chinfo *ch = data;
298 struct a10hdmiaudio_info *sc = ch->parent;
300 if (!PCMTRIG_COMMON(go))
303 snd_mtxlock(sc->lock);
307 a10hdmiaudio_start(ch);
312 a10hdmiaudio_stop(ch);
317 snd_mtxunlock(sc->lock);
323 a10hdmiaudio_chan_getptr(kobj_t obj, void *data)
325 struct a10hdmiaudio_chinfo *ch = data;
330 static struct pcmchan_caps *
331 a10hdmiaudio_chan_getcaps(kobj_t obj, void *data)
333 return (&a10hdmiaudio_pcaps);
336 static kobj_method_t a10hdmiaudio_chan_methods[] = {
337 KOBJMETHOD(channel_init, a10hdmiaudio_chan_init),
338 KOBJMETHOD(channel_free, a10hdmiaudio_chan_free),
339 KOBJMETHOD(channel_setformat, a10hdmiaudio_chan_setformat),
340 KOBJMETHOD(channel_setspeed, a10hdmiaudio_chan_setspeed),
341 KOBJMETHOD(channel_setblocksize, a10hdmiaudio_chan_setblocksize),
342 KOBJMETHOD(channel_trigger, a10hdmiaudio_chan_trigger),
343 KOBJMETHOD(channel_getptr, a10hdmiaudio_chan_getptr),
344 KOBJMETHOD(channel_getcaps, a10hdmiaudio_chan_getcaps),
347 CHANNEL_DECLARE(a10hdmiaudio_chan);
355 a10hdmiaudio_probe(device_t dev)
357 if (!ofw_bus_status_okay(dev))
360 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-hdmiaudio"))
363 device_set_desc(dev, "Allwinner HDMI Audio");
364 return (BUS_PROBE_DEFAULT);
368 a10hdmiaudio_attach(device_t dev)
370 struct a10hdmiaudio_info *sc;
371 char status[SND_STATUSLEN];
374 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
376 sc->lock = snd_mtxcreate(device_get_nameunit(dev), "a10hdmiaudio softc");
378 sc->dmasize = pcm_getbuffersize(dev, DMABUF_MIN,
379 DMABUF_DEFAULT, DMABUF_MAX);
380 error = bus_dma_tag_create(
381 bus_get_dma_tag(dev),
382 4, sc->dmasize, /* alignment, boundary */
383 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
384 BUS_SPACE_MAXADDR, /* highaddr */
385 NULL, NULL, /* filter, filterarg */
386 sc->dmasize, 1, /* maxsize, nsegs */
387 sc->dmasize, 0, /* maxsegsize, flags */
388 NULL, NULL, /* lockfunc, lockarg */
391 device_printf(dev, "cannot create DMA tag\n");
395 if (mixer_init(dev, &a10hdmiaudio_mixer_class, sc)) {
396 device_printf(dev, "mixer_init failed\n");
400 pcm_setflags(dev, pcm_getflags(dev) | SD_F_MPSAFE);
401 pcm_setflags(dev, pcm_getflags(dev) | SD_F_SOFTPCMVOL);
403 if (pcm_register(dev, sc, 1, 0)) {
404 device_printf(dev, "pcm_register failed\n");
408 pcm_addchan(dev, PCMDIR_PLAY, &a10hdmiaudio_chan_class, sc);
410 snprintf(status, SND_STATUSLEN, "at %s", ofw_bus_get_name(dev));
411 pcm_setstatus(dev, status);
416 snd_mtxfree(sc->lock);
422 static device_method_t a10hdmiaudio_pcm_methods[] = {
423 /* Device interface */
424 DEVMETHOD(device_probe, a10hdmiaudio_probe),
425 DEVMETHOD(device_attach, a10hdmiaudio_attach),
430 static driver_t a10hdmiaudio_pcm_driver = {
432 a10hdmiaudio_pcm_methods,
436 DRIVER_MODULE(a10hdmiaudio, simplebus, a10hdmiaudio_pcm_driver, pcm_devclass, 0, 0);
437 MODULE_DEPEND(a10hdmiaudio, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
438 MODULE_VERSION(a10hdmiaudio, 1);