void
omap3530_sdma_detach(omap3530_spi_t *omap3530)
{
rsrc_request_t req = { 0 };
if (omap3530->sdma_tx_chid != -1)
{
req.length = 1;
req.start = omap3530->sdma_tx_chid;
req.flags = RSRCDBMGR_DMA_CHANNEL;
rsrcdbmgr_detach (&req, 1);
}
if (omap3530->sdma_rx_chid != -1)
{
memset (&req, 0, sizeof (req));
req.length = 1;
req.start = omap3530->sdma_rx_chid;
req.flags = RSRCDBMGR_DMA_CHANNEL;
rsrcdbmgr_detach (&req, 1);
}
munmap_device_memory (omap3530->dma4, sizeof (dma4_t));
}
static void dmac_fini (dmac_dev_t * dmac_dev)
{
rsrc_request_t req;
int timeout = 0;
munmap (dmac_dev->lli, (MAX_LLI_NUM) * sizeof(at91sam9xx_dmac_bd_t) );
/* Disable channel */
dmac_dev->dmac->chdr |= (1 << dmac_dev->chid);
while (dmac_dev->dmac->chsr & (1 <<dmac_dev->chid)) {
delay (1);
if (timeout++ > TIMEOUT_LOOPS) {
slogf (_SLOGC_SIM_MMC, _SLOG_ERROR, "%s: release DMAC channel time out\n", __func__);
break;
}
}
/* release DMAC mmap resources */
munmap (dmac_dev->lli, (MAX_LLI_NUM) * sizeof(at91sam9xx_dmac_bd_t) );
/* Release DMAC channel */
memset(&req, 0, sizeof(req));
req.length = 1;
req.flags = RSRCDBMGR_DMA_CHANNEL;
req.start = dmac_dev->chid;
req.end = dmac_dev->chid;
/* Return the resource to the database: */
rsrcdbmgr_detach( &req, 1);
if (dmac_dev != NULL) {
if ( dmac_dev->dmac!= MAP_FAILED)
munmap_device_memory((void *)dmac_dev->dmac, sizeof(at91sam9xx_dmac_t));
free (dmac_dev);
}
}