static int rsnd_src_set_convert_rate(struct rsnd_mod *mod)
{
struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_src *src = rsnd_mod_to_src(mod);
u32 convert_rate = rsnd_src_convert_rate(src);
u32 fsrate = 0;
if (convert_rate)
fsrate = 0x0400000 / convert_rate * runtime->rate;
/* set/clear soft reset */
rsnd_mod_write(mod, SRC_SWRSR, 0);
rsnd_mod_write(mod, SRC_SWRSR, 1);
/* Set channel number and output bit length */
rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod));
/* Enable the initial value of IFS */
if (fsrate) {
rsnd_mod_write(mod, SRC_IFSCR, 1);
/* Set initial value of IFS */
rsnd_mod_write(mod, SRC_IFSVR, fsrate);
}
/* use DMA transfer */
rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
return 0;
}
/*
* Gen2 functions
*/
static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
int ret;
ret = rsnd_src_set_convert_rate(mod, rdai);
if (ret < 0)
return ret;
rsnd_mod_write(mod, SSI_BUSIF_ADINR, rsnd_get_adinr(mod));
rsnd_mod_write(mod, SSI_BUSIF_MODE, 1);
rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
return 0;
}
/*
* Gen1/Gen2 common functions
*/
int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
int use_busif)
{
struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
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_rdai_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;
}