static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
struct device *dev = rsnd_priv_to_dev(priv);
u32 cr;
if (0 == ssi->usrcnt) {
clk_enable(ssi->clk);
if (rsnd_dai_is_clk_master(rdai)) {
if (rsnd_ssi_clk_from_parent(ssi))
rsnd_ssi_hw_start(ssi->parent, rdai, io);
else
rsnd_ssi_master_clk_start(ssi, io);
}
}
cr = ssi->cr_own |
ssi->cr_clk |
ssi->cr_etc |
EN;
rsnd_mod_write(&ssi->mod, SSICR, cr);
ssi->usrcnt++;
dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod));
}
/*
* Gen1/Gen2 common functions
*/
int rsnd_src_ssi_mode_init(struct rsnd_mod *ssi_mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
int ssi_id = rsnd_mod_id(ssi_mod);
int has_src = 0;
/*
* SSI_MODE0
*/
if (info->dai_info) {
has_src = !!src_mod;
} else {
struct rsnd_src *src = rsnd_mod_to_src(src_mod);
has_src = rsnd_src_hpbif_is_enable(src);
}
rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
has_src ? 0 : (1 << ssi_id));
/*
* SSI_MODE1
*/
if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
int shift = -1;
switch (ssi_id) {
case 1:
shift = 0;
break;
case 2:
shift = 2;
break;
case 4:
shift = 16;
break;
}
if (shift >= 0)
rsnd_mod_bset(ssi_mod, SSI_MODE1,
0x3 << shift,
rsnd_dai_is_clk_master(rdai) ?
0x2 << shift : 0x1 << shift);
}
return 0;
}
static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi,
struct rsnd_dai *rdai)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
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_dai_is_clk_master(rdai)) {
if (rsnd_ssi_clk_from_parent(ssi))
rsnd_ssi_hw_stop(ssi->parent, rdai);
else
rsnd_ssi_master_clk_stop(ssi);
}
clk_disable(ssi->clk);
}
dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod));
}
static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
/* enable DMA transfer */
ssi->cr_etc = DMEN;
rsnd_dma_start(dma);
rsnd_ssi_hw_start(ssi, ssi->rdai, io);
/* enable WS continue */
if (rsnd_dai_is_clk_master(rdai))
rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
return 0;
}
/*
* Gen1/Gen2 common functions
*/
int rsnd_src_ssi_mode_init(struct rsnd_mod *ssi_mod,
struct rsnd_dai *rdai)
{
struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
int ssi_id = rsnd_mod_id(ssi_mod);
/*
* SSI_MODE0
*/
rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
src_mod ? 0 : (1 << ssi_id));
/*
* SSI_MODE1
*/
if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
int shift = -1;
switch (ssi_id) {
case 1:
shift = 0;
break;
case 2:
shift = 2;
break;
case 4:
shift = 16;
break;
}
if (shift >= 0)
rsnd_mod_bset(ssi_mod, SSI_MODE1,
0x3 << shift,
rsnd_dai_is_clk_master(rdai) ?
0x2 << shift : 0x1 << shift);
}
return 0;
}
/*
* Gen1/Gen2 common functions
*/
int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
struct rsnd_dai *rdai,
int use_busif)
{
struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
int ssi_id = rsnd_mod_id(ssi_mod);
/*
* SSI_MODE0
*/
rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
!use_busif << ssi_id);
/*
* SSI_MODE1
*/
if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
int shift = -1;
switch (ssi_id) {
case 1:
shift = 0;
break;
case 2:
shift = 2;
break;
case 4:
shift = 16;
break;
}
if (shift >= 0)
rsnd_mod_bset(ssi_mod, SSI_MODE1,
0x3 << shift,
rsnd_dai_is_clk_master(rdai) ?
0x2 << shift : 0x1 << shift);
}
/*
* DMA settings for SSIU
*/
if (use_busif) {
u32 val = 0x76543210;
u32 mask = ~0;
rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR,
rsnd_get_adinr(ssi_mod));
rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE, 1);
rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1);
mask <<= runtime->channels * 4;
val = val & mask;
switch (runtime->sample_bits) {
case 16:
val |= 0x67452301 & ~mask;
break;
case 32:
val |= 0x76543210 & ~mask;
break;
}
rsnd_mod_write(ssi_mod, BUSIF_DALIGN, val);
}
return 0;
}
