static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct device *dev = rsnd_priv_to_dev(priv);
u32 cr;
if (0 == ssi->usrcnt) /* stop might be called without start */
return;
ssi->usrcnt--;
if (0 == ssi->usrcnt) {
/*
* disable all IRQ,
* and, wait all data was sent
*/
cr = ssi->cr_own |
ssi->cr_clk;
rsnd_mod_write(&ssi->mod, SSICR, cr | EN);
rsnd_ssi_status_check(&ssi->mod, DIRQ);
/*
* disable SSI,
* and, wait idle state
*/
rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */
rsnd_ssi_status_check(&ssi->mod, IIRQ);
if (rsnd_rdai_is_clk_master(rdai)) {
if (rsnd_ssi_clk_from_parent(ssi))
rsnd_ssi_hw_stop(ssi->parent);
else
rsnd_ssi_master_clk_stop(ssi);
}
rsnd_mod_hw_stop(&ssi->mod);
}
dev_dbg(dev, "%s[%d] hw stopped\n",
rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
}
static int rsnd_ssi_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
u32 cr;
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
/*
* don't stop if not last user
* see also
* rsnd_ssi_start
* rsnd_ssi_interrupt
*/
if (ssi->usrcnt > 1)
return 0;
/*
* disable all IRQ,
* and, wait all data was sent
*/
cr = ssi->cr_own |
ssi->cr_clk;
rsnd_mod_write(mod, SSICR, cr | EN);
rsnd_ssi_status_check(mod, DIRQ);
/*
* disable SSI,
* and, wait idle state
*/
rsnd_mod_write(mod, SSICR, cr); /* disabled all */
rsnd_ssi_status_check(mod, IIRQ);
return 0;
}
