/*- * Copyright (c) 2016 Jared McNeill * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Allwinner A10/A20 HDMI Audio */ #include #include #include #include #include #include #include #include #include #include #include #include #include "sunxi_dma_if.h" #include "mixer_if.h" #define DRQTYPE_HDMIAUDIO 24 #define DRQTYPE_SDRAM 1 #define DMA_WIDTH 32 #define DMA_BURST_LEN 8 #define DDMA_BLKSIZE 32 #define DDMA_WAIT_CYC 8 #define DMABUF_MIN 4096 #define DMABUF_DEFAULT 65536 #define DMABUF_MAX 131072 #define HDMI_SAMPLERATE 48000 #define TX_FIFO 0x01c16400 static uint32_t a10hdmiaudio_fmt[] = { SND_FORMAT(AFMT_S16_LE, 2, 0), 0 }; static struct pcmchan_caps a10hdmiaudio_pcaps = { HDMI_SAMPLERATE, HDMI_SAMPLERATE, a10hdmiaudio_fmt, 0 }; struct a10hdmiaudio_info; struct a10hdmiaudio_chinfo { struct snd_dbuf *buffer; struct pcm_channel *channel; struct a10hdmiaudio_info *parent; bus_dmamap_t dmamap; void *dmaaddr; bus_addr_t physaddr; device_t dmac; void *dmachan; int run; uint32_t pos; uint32_t blocksize; }; struct a10hdmiaudio_info { device_t dev; struct mtx *lock; bus_dma_tag_t dmat; unsigned dmasize; struct a10hdmiaudio_chinfo play; }; /* * Mixer interface */ static int a10hdmiaudio_mixer_init(struct snd_mixer *m) { mix_setdevs(m, SOUND_MASK_PCM); return (0); } static int a10hdmiaudio_mixer_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right) { return (-1); } static kobj_method_t a10hdmiaudio_mixer_methods[] = { KOBJMETHOD(mixer_init, a10hdmiaudio_mixer_init), KOBJMETHOD(mixer_set, a10hdmiaudio_mixer_set), KOBJMETHOD_END }; MIXER_DECLARE(a10hdmiaudio_mixer); /* * Channel interface */ static void a10hdmiaudio_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) { struct a10hdmiaudio_chinfo *ch = arg; if (error != 0) return; ch->physaddr = segs[0].ds_addr; } static void a10hdmiaudio_transfer(struct a10hdmiaudio_chinfo *ch) { int error; error = SUNXI_DMA_TRANSFER(ch->dmac, ch->dmachan, ch->physaddr + ch->pos, TX_FIFO, ch->blocksize); if (error) { ch->run = 0; device_printf(ch->parent->dev, "DMA transfer failed: %d\n", error); } } static void a10hdmiaudio_dmaconfig(struct a10hdmiaudio_chinfo *ch) { struct sunxi_dma_config conf; memset(&conf, 0, sizeof(conf)); conf.src_width = conf.dst_width = DMA_WIDTH; conf.src_burst_len = conf.dst_burst_len = DMA_BURST_LEN; conf.src_blksize = conf.dst_blksize = DDMA_BLKSIZE; conf.src_wait_cyc = conf.dst_wait_cyc = DDMA_WAIT_CYC; conf.src_drqtype = DRQTYPE_SDRAM; conf.dst_drqtype = DRQTYPE_HDMIAUDIO; conf.dst_noincr = true; SUNXI_DMA_SET_CONFIG(ch->dmac, ch->dmachan, &conf); } static void a10hdmiaudio_dmaintr(void *priv) { struct a10hdmiaudio_chinfo *ch = priv; unsigned bufsize; bufsize = sndbuf_getsize(ch->buffer); ch->pos += ch->blocksize; if (ch->pos >= bufsize) ch->pos -= bufsize; if (ch->run) { chn_intr(ch->channel); a10hdmiaudio_transfer(ch); } } static void a10hdmiaudio_start(struct a10hdmiaudio_chinfo *ch) { ch->pos = 0; /* Configure DMA channel */ a10hdmiaudio_dmaconfig(ch); /* Start DMA transfer */ a10hdmiaudio_transfer(ch); } static void a10hdmiaudio_stop(struct a10hdmiaudio_chinfo *ch) { /* Disable DMA channel */ SUNXI_DMA_HALT(ch->dmac, ch->dmachan); } static void * a10hdmiaudio_chan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir) { struct a10hdmiaudio_info *sc = devinfo; struct a10hdmiaudio_chinfo *ch = &sc->play; int error; ch->parent = sc; ch->channel = c; ch->buffer = b; ch->dmac = devclass_get_device(devclass_find("a10dmac"), 0); if (ch->dmac == NULL) { device_printf(sc->dev, "cannot find DMA controller\n"); return (NULL); } ch->dmachan = SUNXI_DMA_ALLOC(ch->dmac, true, a10hdmiaudio_dmaintr, ch); if (ch->dmachan == NULL) { device_printf(sc->dev, "cannot allocate DMA channel\n"); return (NULL); } error = bus_dmamem_alloc(sc->dmat, &ch->dmaaddr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &ch->dmamap); if (error != 0) { device_printf(sc->dev, "cannot allocate channel buffer\n"); return (NULL); } error = bus_dmamap_load(sc->dmat, ch->dmamap, ch->dmaaddr, sc->dmasize, a10hdmiaudio_dmamap_cb, ch, BUS_DMA_NOWAIT); if (error != 0) { device_printf(sc->dev, "cannot load DMA map\n"); return (NULL); } memset(ch->dmaaddr, 0, sc->dmasize); if (sndbuf_setup(ch->buffer, ch->dmaaddr, sc->dmasize) != 0) { device_printf(sc->dev, "cannot setup sndbuf\n"); return (NULL); } return (ch); } static int a10hdmiaudio_chan_free(kobj_t obj, void *data) { struct a10hdmiaudio_chinfo *ch = data; struct a10hdmiaudio_info *sc = ch->parent; SUNXI_DMA_FREE(ch->dmac, ch->dmachan); bus_dmamap_unload(sc->dmat, ch->dmamap); bus_dmamem_free(sc->dmat, ch->dmaaddr, ch->dmamap); return (0); } static int a10hdmiaudio_chan_setformat(kobj_t obj, void *data, uint32_t format) { return (0); } static uint32_t a10hdmiaudio_chan_setspeed(kobj_t obj, void *data, uint32_t speed) { return (HDMI_SAMPLERATE); } static uint32_t a10hdmiaudio_chan_setblocksize(kobj_t obj, void *data, uint32_t blocksize) { struct a10hdmiaudio_chinfo *ch = data; ch->blocksize = blocksize & ~3; return (ch->blocksize); } static int a10hdmiaudio_chan_trigger(kobj_t obj, void *data, int go) { struct a10hdmiaudio_chinfo *ch = data; struct a10hdmiaudio_info *sc = ch->parent; if (!PCMTRIG_COMMON(go)) return (0); snd_mtxlock(sc->lock); switch (go) { case PCMTRIG_START: ch->run = 1; a10hdmiaudio_start(ch); break; case PCMTRIG_STOP: case PCMTRIG_ABORT: ch->run = 0; a10hdmiaudio_stop(ch); break; default: break; } snd_mtxunlock(sc->lock); return (0); } static uint32_t a10hdmiaudio_chan_getptr(kobj_t obj, void *data) { struct a10hdmiaudio_chinfo *ch = data; return (ch->pos); } static struct pcmchan_caps * a10hdmiaudio_chan_getcaps(kobj_t obj, void *data) { return (&a10hdmiaudio_pcaps); } static kobj_method_t a10hdmiaudio_chan_methods[] = { KOBJMETHOD(channel_init, a10hdmiaudio_chan_init), KOBJMETHOD(channel_free, a10hdmiaudio_chan_free), KOBJMETHOD(channel_setformat, a10hdmiaudio_chan_setformat), KOBJMETHOD(channel_setspeed, a10hdmiaudio_chan_setspeed), KOBJMETHOD(channel_setblocksize, a10hdmiaudio_chan_setblocksize), KOBJMETHOD(channel_trigger, a10hdmiaudio_chan_trigger), KOBJMETHOD(channel_getptr, a10hdmiaudio_chan_getptr), KOBJMETHOD(channel_getcaps, a10hdmiaudio_chan_getcaps), KOBJMETHOD_END }; CHANNEL_DECLARE(a10hdmiaudio_chan); /* * Device interface */ static int a10hdmiaudio_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-hdmiaudio")) return (ENXIO); device_set_desc(dev, "Allwinner HDMI Audio"); return (BUS_PROBE_DEFAULT); } static int a10hdmiaudio_attach(device_t dev) { struct a10hdmiaudio_info *sc; char status[SND_STATUSLEN]; int error; sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO); sc->dev = dev; sc->lock = snd_mtxcreate(device_get_nameunit(dev), "a10hdmiaudio softc"); sc->dmasize = pcm_getbuffersize(dev, DMABUF_MIN, DMABUF_DEFAULT, DMABUF_MAX); error = bus_dma_tag_create( bus_get_dma_tag(dev), 4, sc->dmasize, /* alignment, boundary */ BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ sc->dmasize, 1, /* maxsize, nsegs */ sc->dmasize, 0, /* maxsegsize, flags */ NULL, NULL, /* lockfunc, lockarg */ &sc->dmat); if (error != 0) { device_printf(dev, "cannot create DMA tag\n"); goto fail; } if (mixer_init(dev, &a10hdmiaudio_mixer_class, sc)) { device_printf(dev, "mixer_init failed\n"); goto fail; } pcm_setflags(dev, pcm_getflags(dev) | SD_F_MPSAFE); pcm_setflags(dev, pcm_getflags(dev) | SD_F_SOFTPCMVOL); if (pcm_register(dev, sc, 1, 0)) { device_printf(dev, "pcm_register failed\n"); goto fail; } pcm_addchan(dev, PCMDIR_PLAY, &a10hdmiaudio_chan_class, sc); snprintf(status, SND_STATUSLEN, "at %s", ofw_bus_get_name(dev)); pcm_setstatus(dev, status); return (0); fail: snd_mtxfree(sc->lock); free(sc, M_DEVBUF); return (error); } static device_method_t a10hdmiaudio_pcm_methods[] = { /* Device interface */ DEVMETHOD(device_probe, a10hdmiaudio_probe), DEVMETHOD(device_attach, a10hdmiaudio_attach), DEVMETHOD_END }; static driver_t a10hdmiaudio_pcm_driver = { "pcm", a10hdmiaudio_pcm_methods, PCM_SOFTC_SIZE, }; DRIVER_MODULE(a10hdmiaudio, simplebus, a10hdmiaudio_pcm_driver, pcm_devclass, 0, 0); MODULE_DEPEND(a10hdmiaudio, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); MODULE_VERSION(a10hdmiaudio, 1);