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Diffstat (limited to 'sound/soc/sh/rcar/dma.c')
-rw-r--r--sound/soc/sh/rcar/dma.c188
1 files changed, 56 insertions, 132 deletions
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index 041ec1080d52..41de23417c4a 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -26,10 +26,7 @@
struct rsnd_dmaen {
struct dma_chan *chan;
dma_cookie_t cookie;
- dma_addr_t dma_buf;
unsigned int dma_len;
- unsigned int dma_period;
- unsigned int dma_cnt;
};
struct rsnd_dmapp {
@@ -60,72 +57,21 @@ struct rsnd_dma_ctrl {
#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
+/* for DEBUG */
+static struct rsnd_mod_ops mem_ops = {
+ .name = "mem",
+};
+
+static struct rsnd_mod mem = {
+};
+
/*
* Audio DMAC
*/
-#define rsnd_dmaen_sync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 1)
-#define rsnd_dmaen_unsync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 0)
-static void __rsnd_dmaen_sync(struct rsnd_dmaen *dmaen, struct rsnd_dai_stream *io,
- int i, int sync)
-{
- struct device *dev = dmaen->chan->device->dev;
- enum dma_data_direction dir;
- int is_play = rsnd_io_is_play(io);
- dma_addr_t buf;
- int len, max;
- size_t period;
-
- len = dmaen->dma_len;
- period = dmaen->dma_period;
- max = len / period;
- i = i % max;
- buf = dmaen->dma_buf + (period * i);
-
- dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
-
- if (sync)
- dma_sync_single_for_device(dev, buf, period, dir);
- else
- dma_sync_single_for_cpu(dev, buf, period, dir);
-}
-
static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
- struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
- struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
- struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
- bool elapsed = false;
- unsigned long flags;
-
- /*
- * Renesas sound Gen1 needs 1 DMAC,
- * Gen2 needs 2 DMAC.
- * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
- * But, Audio-DMAC-peri-peri doesn't have interrupt,
- * and this driver is assuming that here.
- */
- spin_lock_irqsave(&priv->lock, flags);
-
- if (rsnd_io_is_working(io)) {
- rsnd_dmaen_unsync(dmaen, io, dmaen->dma_cnt);
-
- /*
- * Next period is already started.
- * Let's sync Next Next period
- * see
- * rsnd_dmaen_start()
- */
- rsnd_dmaen_sync(dmaen, io, dmaen->dma_cnt + 2);
-
- elapsed = true;
-
- dmaen->dma_cnt++;
- }
-
- spin_unlock_irqrestore(&priv->lock, flags);
-
- if (elapsed)
+ if (rsnd_io_is_working(io))
rsnd_dai_period_elapsed(io);
}
@@ -157,14 +103,8 @@ static int rsnd_dmaen_stop(struct rsnd_mod *mod,
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
- if (dmaen->chan) {
- int is_play = rsnd_io_is_play(io);
-
+ if (dmaen->chan)
dmaengine_terminate_all(dmaen->chan);
- dma_unmap_single(dmaen->chan->device->dev,
- dmaen->dma_buf, dmaen->dma_len,
- is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- }
return 0;
}
@@ -211,11 +151,9 @@ static int rsnd_dmaen_nolock_start(struct rsnd_mod *mod,
dma->mod_from,
dma->mod_to);
if (IS_ERR_OR_NULL(dmaen->chan)) {
- int ret = PTR_ERR(dmaen->chan);
-
dmaen->chan = NULL;
dev_err(dev, "can't get dma channel\n");
- return ret;
+ return -EIO;
}
return 0;
@@ -231,11 +169,7 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_async_tx_descriptor *desc;
struct dma_slave_config cfg = {};
- dma_addr_t buf;
- size_t len;
- size_t period;
int is_play = rsnd_io_is_play(io);
- int i;
int ret;
cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
@@ -252,19 +186,10 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
if (ret < 0)
return ret;
- len = snd_pcm_lib_buffer_bytes(substream);
- period = snd_pcm_lib_period_bytes(substream);
- buf = dma_map_single(dmaen->chan->device->dev,
- substream->runtime->dma_area,
- len,
- is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (dma_mapping_error(dmaen->chan->device->dev, buf)) {
- dev_err(dev, "dma map failed\n");
- return -EIO;
- }
-
desc = dmaengine_prep_dma_cyclic(dmaen->chan,
- buf, len, period,
+ substream->runtime->dma_addr,
+ snd_pcm_lib_buffer_bytes(substream),
+ snd_pcm_lib_period_bytes(substream),
is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
@@ -276,18 +201,7 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
desc->callback = rsnd_dmaen_complete;
desc->callback_param = rsnd_mod_get(dma);
- dmaen->dma_buf = buf;
- dmaen->dma_len = len;
- dmaen->dma_period = period;
- dmaen->dma_cnt = 0;
-
- /*
- * synchronize this and next period
- * see
- * __rsnd_dmaen_complete()
- */
- for (i = 0; i < 2; i++)
- rsnd_dmaen_sync(dmaen, io, i);
+ dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
dmaen->cookie = dmaengine_submit(desc);
if (dmaen->cookie < 0) {
@@ -747,20 +661,22 @@ static void rsnd_dma_of_path(struct rsnd_mod *this,
rsnd_mod_name(this), rsnd_mod_id(this));
for (i = 0; i <= idx; i++) {
dev_dbg(dev, " %s[%d]%s\n",
- rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]),
- (mod[i] == *mod_from) ? " from" :
- (mod[i] == *mod_to) ? " to" : "");
+ rsnd_mod_name(mod[i] ? mod[i] : &mem),
+ rsnd_mod_id (mod[i] ? mod[i] : &mem),
+ (mod[i] == *mod_from) ? " from" :
+ (mod[i] == *mod_to) ? " to" : "");
}
}
-int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
- struct rsnd_mod **dma_mod)
+static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
+ struct rsnd_mod **dma_mod)
{
struct rsnd_mod *mod_from = NULL;
struct rsnd_mod *mod_to = NULL;
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_dma *dma;
struct rsnd_mod_ops *ops;
enum rsnd_mod_type type;
int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
@@ -800,40 +716,47 @@ int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
type = RSND_MOD_AUDMA;
}
- if (!(*dma_mod)) {
- struct rsnd_dma *dma;
+ dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
+ if (!dma)
+ return -ENOMEM;
- dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
- if (!dma)
- return -ENOMEM;
+ *dma_mod = rsnd_mod_get(dma);
- *dma_mod = rsnd_mod_get(dma);
+ ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
+ rsnd_mod_get_status, type, dma_id);
+ if (ret < 0)
+ return ret;
- ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
- rsnd_mod_get_status, type, dma_id);
- if (ret < 0)
- return ret;
+ dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n",
+ rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod),
+ rsnd_mod_name(mod_from ? mod_from : &mem),
+ rsnd_mod_id (mod_from ? mod_from : &mem),
+ rsnd_mod_name(mod_to ? mod_to : &mem),
+ rsnd_mod_id (mod_to ? mod_to : &mem));
- dev_dbg(dev, "%s[%d] %s[%d] -> %s[%d]\n",
- rsnd_mod_name(*dma_mod), rsnd_mod_id(*dma_mod),
- rsnd_mod_name(mod_from), rsnd_mod_id(mod_from),
- rsnd_mod_name(mod_to), rsnd_mod_id(mod_to));
+ ret = attach(io, dma, mod_from, mod_to);
+ if (ret < 0)
+ return ret;
+
+ dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
+ dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
+ dma->mod_from = mod_from;
+ dma->mod_to = mod_to;
+
+ return 0;
+}
+
+int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
+ struct rsnd_mod **dma_mod)
+{
+ if (!(*dma_mod)) {
+ int ret = rsnd_dma_alloc(io, mod, dma_mod);
- ret = attach(io, dma, mod_from, mod_to);
if (ret < 0)
return ret;
-
- dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
- dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
- dma->mod_from = mod_from;
- dma->mod_to = mod_to;
}
- ret = rsnd_dai_connect(*dma_mod, io, type);
- if (ret < 0)
- return ret;
-
- return 0;
+ return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
}
int rsnd_dma_probe(struct rsnd_priv *priv)
@@ -866,5 +789,6 @@ int rsnd_dma_probe(struct rsnd_priv *priv)
priv->dma = dmac;
- return 0;
+ /* dummy mem mod for debug */
+ return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, NULL, 0, 0);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.