/*
* vs interrupt handler
*/
static int
vs_dmaintr(void *hdl)
{
struct vs_softc *sc;
DPRINTF(2, ("vs_dmaintr\n"));
sc = hdl;
mutex_spin_enter(&sc->sc_intr_lock);
if (sc->sc_pintr) {
/* start next transfer */
sc->sc_current.dmap += sc->sc_current.blksize;
if (sc->sc_current.dmap + sc->sc_current.blksize
> sc->sc_current.bufsize)
sc->sc_current.dmap -= sc->sc_current.bufsize;
dmac_start_xfer_offset(sc->sc_dma_ch->ch_softc,
sc->sc_current.xfer,
sc->sc_current.dmap,
sc->sc_current.blksize);
sc->sc_pintr(sc->sc_parg);
} else if (sc->sc_rintr) {
/* start next transfer */
sc->sc_current.dmap += sc->sc_current.blksize;
if (sc->sc_current.dmap + sc->sc_current.blksize
> sc->sc_current.bufsize)
sc->sc_current.dmap -= sc->sc_current.bufsize;
dmac_start_xfer_offset(sc->sc_dma_ch->ch_softc,
sc->sc_current.xfer,
sc->sc_current.dmap,
sc->sc_current.blksize);
sc->sc_rintr(sc->sc_rarg);
} else {
printf("vs_dmaintr: spurious interrupt\n");
}
mutex_spin_exit(&sc->sc_intr_lock);
return 1;
}
static int
vs_trigger_output(void *hdl, void *start, void *end, int bsize,
void (*intr)(void *), void *arg,
const audio_params_t *p)
{
struct vs_softc *sc;
struct vs_dma *vd;
struct dmac_dma_xfer *xf;
struct dmac_channel_stat *chan;
DPRINTF(2, ("vs_trigger_output: start=%p, bsize=%d, intr=%p, arg=%p\n",
start, bsize, intr, arg));
sc = hdl;
chan = sc->sc_dma_ch;
sc->sc_pintr = intr;
sc->sc_parg = arg;
sc->sc_current.blksize = bsize;
sc->sc_current.bufsize = (char *)end - (char *)start;
sc->sc_current.dmap = 0;
/* Find DMA buffer. */
for (vd = sc->sc_dmas; vd != NULL && KVADDR(vd) != start;
vd = vd->vd_next)
continue;
if (vd == NULL) {
printf("%s: trigger_output: bad addr %p\n",
device_xname(sc->sc_dev), start);
return EINVAL;
}
vs_set_sr(sc, sc->sc_current.prate);
vs_set_po(sc, VS_PANOUT_LR);
xf = dmac_alloc_xfer(chan, sc->sc_dmat, vd->vd_map);
sc->sc_current.xfer = xf;
chan->ch_dcr = (DMAC_DCR_XRM_CSWOH | DMAC_DCR_OTYP_EASYNC |
DMAC_DCR_OPS_8BIT);
chan->ch_ocr = DMAC_OCR_REQG_EXTERNAL;
xf->dx_ocr = DMAC_OCR_DIR_MTD;
xf->dx_scr = DMAC_SCR_MAC_COUNT_UP | DMAC_SCR_DAC_NO_COUNT;
xf->dx_device = sc->sc_addr + MSM6258_DATA*2 + 1;
dmac_load_xfer(chan->ch_softc, xf);
dmac_start_xfer_offset(chan->ch_softc, xf, 0, sc->sc_current.blksize);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, MSM6258_STAT, 2);
return 0;
}
/*
* Do the actual transfer.
*/
int
dmac_start_xfer(struct dmac_softc *dmac, struct dmac_dma_xfer *xf)
{
return dmac_start_xfer_offset(dmac, xf, 0, 0);
}
