@@ -2300,6 +2300,7 @@ static struct snd_compr_ops wm5110_compr_ops = {
.get_caps = wm_adsp_compr_get_caps,
.trigger = wm_adsp_compr_trigger,
.pointer = wm_adsp_compr_pointer,
+ .copy = wm_adsp_compr_copy,
};
static struct snd_soc_platform_driver wm5110_compr_platform = {
@@ -293,6 +293,7 @@ struct wm_adsp_compr {
struct snd_compr_stream *stream;
struct snd_compressed_buffer size;
+ u32 *raw_buf;
unsigned int copied_total;
};
@@ -2385,6 +2386,7 @@ int wm_adsp_compr_free(struct snd_compr_stream *stream)
dsp->compr = NULL;
+ kfree(compr->raw_buf);
kfree(compr);
mutex_unlock(&dsp->pwr_lock);
@@ -2452,6 +2454,7 @@ int wm_adsp_compr_set_params(struct snd_compr_stream *stream,
struct snd_compr_params *params)
{
struct wm_adsp_compr *compr = stream->runtime->private_data;
+ unsigned int size;
int ret;
ret = wm_adsp_compr_check_params(stream, params);
@@ -2463,6 +2466,11 @@ int wm_adsp_compr_set_params(struct snd_compr_stream *stream,
adsp_dbg(compr->dsp, "fragment_size=%d fragments=%d\n",
compr->size.fragment_size, compr->size.fragments);
+ size = wm_adsp_compr_frag_words(compr) * sizeof(*compr->raw_buf);
+ compr->raw_buf = kmalloc(size, GFP_DMA | GFP_KERNEL);
+ if (!compr->raw_buf)
+ return -ENOMEM;
+
return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_set_params);
@@ -2796,6 +2804,7 @@ static int wm_adsp_buffer_update_avail(struct wm_adsp_compr_buf *buf)
int wm_adsp_compr_handle_irq(struct wm_adsp *dsp)
{
struct wm_adsp_compr_buf *buf = dsp->buffer;
+ struct wm_adsp_compr *compr = dsp->compr;
int ret = 0;
mutex_lock(&dsp->pwr_lock);
@@ -2832,6 +2841,9 @@ int wm_adsp_compr_handle_irq(struct wm_adsp *dsp)
goto out;
}
+ if (compr->stream)
+ snd_compr_fragment_elapsed(compr->stream);
+
out:
mutex_unlock(&dsp->pwr_lock);
@@ -2911,4 +2923,130 @@ out:
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_pointer);
+static int wm_adsp_buffer_capture_block(struct wm_adsp_compr *compr, int target)
+{
+ struct wm_adsp_compr_buf *buf = compr->buf;
+ u8 *pack_in = (u8 *)compr->raw_buf;
+ u8 *pack_out = (u8 *)compr->raw_buf;
+ unsigned int adsp_addr;
+ int mem_type, nwords, max_read;
+ int i, j, ret;
+
+ /* Calculate read parameters */
+ for (i = 0; i < wm_adsp_fw[buf->dsp->fw].caps->num_regions; ++i)
+ if (buf->read_index < buf->regions[i].cumulative_size)
+ break;
+
+ if (i == wm_adsp_fw[buf->dsp->fw].caps->num_regions)
+ return -EINVAL;
+
+ mem_type = buf->regions[i].mem_type;
+ adsp_addr = buf->regions[i].base_addr +
+ (buf->read_index - buf->regions[i].offset);
+
+ max_read = wm_adsp_compr_frag_words(compr);
+ nwords = buf->regions[i].cumulative_size - buf->read_index;
+
+ if (nwords > target)
+ nwords = target;
+ if (nwords > buf->avail)
+ nwords = buf->avail;
+ if (nwords > max_read)
+ nwords = max_read;
+ if (!nwords)
+ return 0;
+
+ /* Read data from DSP */
+ ret = wm_adsp_read_data_block(buf->dsp, mem_type, adsp_addr,
+ nwords, compr->raw_buf);
+ if (ret < 0)
+ return ret;
+
+ /* Remove the padding bytes from the data read from the DSP */
+ for (i = 0; i < nwords; i++) {
+ for (j = 0; j < WM_ADSP_DATA_WORD_SIZE; j++)
+ *pack_out++ = *pack_in++;
+
+ pack_in += sizeof(*(compr->raw_buf)) - WM_ADSP_DATA_WORD_SIZE;
+ }
+
+ /* update read index to account for words read */
+ buf->read_index += nwords;
+ if (buf->read_index == wm_adsp_buffer_size(buf))
+ buf->read_index = 0;
+
+ ret = wm_adsp_buffer_write(buf, HOST_BUFFER_FIELD(next_read_index),
+ buf->read_index);
+ if (ret < 0)
+ return ret;
+
+ /* update avail to account for words read */
+ buf->avail -= nwords;
+
+ return nwords;
+}
+
+static int wm_adsp_compr_read(struct wm_adsp_compr *compr,
+ char __user *buf, size_t count)
+{
+ struct wm_adsp *dsp = compr->dsp;
+ int ntotal = 0;
+ int nwords, nbytes;
+
+ adsp_dbg(dsp, "Requested read of %zu bytes\n", count);
+
+ if (!compr->buf)
+ return -ENXIO;
+
+ if (compr->buf->error)
+ return -EIO;
+
+ count /= WM_ADSP_DATA_WORD_SIZE;
+
+ do {
+ nwords = wm_adsp_buffer_capture_block(compr, count);
+ if (nwords < 0) {
+ adsp_err(dsp, "Failed to capture block: %d\n", nwords);
+ return nwords;
+ }
+
+ nbytes = nwords * WM_ADSP_DATA_WORD_SIZE;
+
+ adsp_dbg(dsp, "Read %d bytes\n", nbytes);
+
+ if (copy_to_user(buf + ntotal, compr->raw_buf, nbytes)) {
+ adsp_err(dsp, "Failed to copy data to user: %d, %d\n",
+ ntotal, nbytes);
+ return -EFAULT;
+ }
+
+ count -= nwords;
+ ntotal += nbytes;
+ } while (nwords > 0 && count > 0);
+
+ compr->copied_total += ntotal;
+
+ return ntotal;
+}
+
+int wm_adsp_compr_copy(struct snd_compr_stream *stream, char __user *buf,
+ size_t count)
+{
+ struct wm_adsp_compr *compr = stream->runtime->private_data;
+ struct wm_adsp *dsp = compr->dsp;
+ int ret;
+
+ mutex_lock(&dsp->pwr_lock);
+
+ if (stream->direction == SND_COMPRESS_CAPTURE)
+ ret = wm_adsp_compr_read(compr, buf, count);
+ else
+ ret = -ENOTSUPP;
+
+ mutex_unlock(&dsp->pwr_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(wm_adsp_compr_copy);
+
MODULE_LICENSE("GPL v2");
@@ -115,5 +115,7 @@ extern int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd);
extern int wm_adsp_compr_handle_irq(struct wm_adsp *dsp);
extern int wm_adsp_compr_pointer(struct snd_compr_stream *stream,
struct snd_compr_tstamp *tstamp);
+extern int wm_adsp_compr_copy(struct snd_compr_stream *stream,
+ char __user *buf, size_t count);
#endif
Data is read in blocks of up to one fragment is size from the circular buffer on the DSP and is re-packed to remove the padding byte that exists in the DSP memory map. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> --- No changes since v3. Thanks, Charles sound/soc/codecs/wm5110.c | 1 + sound/soc/codecs/wm_adsp.c | 138 +++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/wm_adsp.h | 2 + 3 files changed, 141 insertions(+)