struct rsnd_dai *rdai;
u32 cr_own;
u32 cr_clk;
- u32 cr_etc;
int err;
unsigned int usrcnt;
unsigned int rate;
#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
#define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma))
-#define rsnd_ssi_pio_available(ssi) ((ssi)->info->pio_irq > 0)
+#define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0)
#define rsnd_ssi_dma_available(ssi) \
rsnd_dma_available(rsnd_mod_to_dma(&(ssi)->mod))
#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent)
struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
int use_busif = 0;
+ if (!rsnd_ssi_is_dma_mode(mod))
+ return 0;
+
if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
use_busif = 1;
if (rsnd_io_to_mod_src(io))
ssi->cr_clk = FORCE | SWL_32 |
SCKD | SWSD | CKDV(j);
- dev_dbg(dev, "ssi%d outputs %u Hz\n",
+ dev_dbg(dev, "%s[%d] outputs %u Hz\n",
+ rsnd_mod_name(&ssi->mod),
rsnd_mod_id(&ssi->mod), rate);
return 0;
{
struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
struct device *dev = rsnd_priv_to_dev(priv);
+ u32 cr_mode;
u32 cr;
if (0 == ssi->usrcnt) {
}
}
+ cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ?
+ DMEN : /* DMA : enable DMA */
+ DIEN; /* PIO : enable Data interrupt */
+
+
cr = ssi->cr_own |
ssi->cr_clk |
- ssi->cr_etc |
- EN;
+ cr_mode |
+ UIEN | OIEN | EN;
rsnd_mod_write(&ssi->mod, SSICR, cr);
+ /* enable WS continue */
+ if (rsnd_dai_is_clk_master(rdai))
+ rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
+
+ /* clear error status */
+ rsnd_mod_write(&ssi->mod, SSISR, 0);
+
ssi->usrcnt++;
- dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod));
+ dev_dbg(dev, "%s[%d] hw started\n",
+ rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
}
static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi,
clk_disable_unprepare(ssi->clk);
}
- dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod));
+ dev_dbg(dev, "%s[%d] hw stopped\n",
+ rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
}
/*
}
}
-/*
- * SSI PIO
- */
-static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
+static int rsnd_ssi_start(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai)
+{
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+
+ rsnd_src_ssiu_start(mod, rdai, rsnd_ssi_use_busif(mod));
+
+ rsnd_ssi_hw_start(ssi, rdai, io);
+
+ rsnd_src_ssi_irq_enable(mod, rdai);
+
+ return 0;
+}
+
+static int rsnd_ssi_stop(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai)
+{
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+
+ rsnd_src_ssi_irq_disable(mod, rdai);
+
+ rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
+
+ rsnd_ssi_hw_stop(ssi, rdai);
+
+ rsnd_src_ssiu_stop(mod, rdai);
+
+ return 0;
+}
+
+static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
{
struct rsnd_ssi *ssi = data;
+ struct rsnd_dai *rdai = ssi->rdai;
struct rsnd_mod *mod = &ssi->mod;
struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
u32 status = rsnd_mod_read(mod, SSISR);
- irqreturn_t ret = IRQ_NONE;
- if (io && (status & DIRQ)) {
- struct rsnd_dai *rdai = ssi->rdai;
+ if (!io)
+ return IRQ_NONE;
+
+ /* PIO only */
+ if (status & DIRQ) {
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 *buf = (u32 *)(runtime->dma_area +
rsnd_dai_pointer_offset(io, 0));
- rsnd_ssi_record_error(ssi, status);
-
/*
* 8/16/32 data can be assesse to TDR/RDR register
* directly as 32bit data
*buf = rsnd_mod_read(mod, SSIRDR);
rsnd_dai_pointer_update(io, sizeof(*buf));
+ }
+
+ /* PIO / DMA */
+ if (status & (UIRQ | OIRQ)) {
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ /*
+ * restart SSI
+ */
+ rsnd_ssi_stop(mod, rdai);
+ rsnd_ssi_start(mod, rdai);
- ret = IRQ_HANDLED;
+ dev_dbg(dev, "%s[%d] restart\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
}
- return ret;
+ rsnd_ssi_record_error(ssi, status);
+
+ return IRQ_HANDLED;
}
+/*
+ * SSI PIO
+ */
static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- int irq = ssi->info->pio_irq;
int ret;
- ret = devm_request_irq(dev, irq,
- rsnd_ssi_pio_interrupt,
+ ret = devm_request_irq(dev, ssi->info->irq,
+ rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), ssi);
if (ret)
- dev_err(dev, "SSI request interrupt failed\n");
-
- dev_dbg(dev, "%s (PIO) is probed\n", rsnd_mod_name(mod));
+ dev_err(dev, "%s[%d] (PIO) request interrupt failed\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
+ else
+ dev_dbg(dev, "%s[%d] (PIO) is probed\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
}
-static int rsnd_ssi_pio_start(struct rsnd_mod *mod,
- struct rsnd_dai *rdai)
-{
- struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
-
- /* enable PIO IRQ */
- ssi->cr_etc = UIEN | OIEN | DIEN;
-
- rsnd_src_ssiu_start(mod, rdai, 0);
-
- rsnd_src_enable_ssi_irq(mod, rdai);
-
- rsnd_ssi_hw_start(ssi, rdai, io);
-
- return 0;
-}
-
-static int rsnd_ssi_pio_stop(struct rsnd_mod *mod,
- struct rsnd_dai *rdai)
-{
- struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
-
- ssi->cr_etc = 0;
-
- rsnd_ssi_hw_stop(ssi, rdai);
-
- rsnd_src_ssiu_stop(mod, rdai, 0);
-
- return 0;
-}
-
static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
.name = SSI_NAME,
.probe = rsnd_ssi_pio_probe,
.init = rsnd_ssi_init,
.quit = rsnd_ssi_quit,
- .start = rsnd_ssi_pio_start,
- .stop = rsnd_ssi_pio_stop,
+ .start = rsnd_ssi_start,
+ .stop = rsnd_ssi_stop,
};
static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
int dma_id = ssi->info->dma_id;
int ret;
+ ret = devm_request_irq(dev, ssi->info->irq,
+ rsnd_ssi_interrupt,
+ IRQF_SHARED,
+ dev_name(dev), ssi);
+ if (ret)
+ goto rsnd_ssi_dma_probe_fail;
+
ret = rsnd_dma_init(
priv, rsnd_mod_to_dma(mod),
rsnd_info_is_playback(priv, ssi),
dma_id);
+ if (ret)
+ goto rsnd_ssi_dma_probe_fail;
- if (ret < 0)
- dev_err(dev, "SSI DMA failed\n");
+ dev_dbg(dev, "%s[%d] (DMA) is probed\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ return ret;
- dev_dbg(dev, "%s (DMA) is probed\n", rsnd_mod_name(mod));
+rsnd_ssi_dma_probe_fail:
+ dev_err(dev, "%s[%d] (DMA) is failed\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
return ret;
}
static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ int irq = ssi->info->irq;
+
rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));
+ /* PIO will request IRQ again */
+ devm_free_irq(dev, irq, ssi);
+
return 0;
}
-static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
- struct rsnd_dai *rdai)
+static int rsnd_ssi_fallback(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai)
{
- struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
- struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
- /* enable DMA transfer */
- ssi->cr_etc = DMEN;
+ /*
+ * fallback to PIO
+ *
+ * SSI .probe might be called again.
+ * see
+ * rsnd_rdai_continuance_probe()
+ */
+ mod->ops = &rsnd_ssi_pio_ops;
- rsnd_src_ssiu_start(mod, rdai, rsnd_ssi_use_busif(mod));
+ dev_info(dev, "%s[%d] fallback to PIO mode\n",
+ rsnd_mod_name(mod), rsnd_mod_id(mod));
- rsnd_dma_start(dma);
+ return 0;
+}
- rsnd_ssi_hw_start(ssi, ssi->rdai, io);
+static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
- /* enable WS continue */
- if (rsnd_dai_is_clk_master(rdai))
- rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
+ rsnd_ssi_start(mod, rdai);
+
+ rsnd_dma_start(dma);
return 0;
}
static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
struct rsnd_dai *rdai)
{
- struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
- struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
-
- ssi->cr_etc = 0;
-
- rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
-
- rsnd_ssi_hw_stop(ssi, rdai);
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
rsnd_dma_stop(dma);
- rsnd_src_ssiu_stop(mod, rdai, 1);
+ rsnd_ssi_stop(mod, rdai);
return 0;
}
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_dma_start,
.stop = rsnd_ssi_dma_stop,
+ .fallback = rsnd_ssi_fallback,
};
+int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
+{
+ return mod->ops == &rsnd_ssi_dma_ops;
+}
+
+
/*
* Non SSI
*/
/*
* irq
*/
- ssi_info->pio_irq = irq_of_parse_and_map(np, 0);
+ ssi_info->irq = irq_of_parse_and_map(np, 0);
/*
* DMA
git.openpandora.org / pandora-kernel.git / blobdiff