ALSA: nm256: Convert to new PCM copy ops

Replace the copy and the silence ops with the new ops.
The conversion is straightforward with standard helper functions, and
now we can drop the bytes <-> frames conversions in callbacks.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/nm256/nm256.c

@@ -695,53 +695,68 @@ snd_nm256_capture_pointer(struct snd_pcm_substream *substream)
  */
 static int
 snd_nm256_playback_silence(struct snd_pcm_substream *substream,
-			   int channel, /* not used (interleaved data) */
-			   snd_pcm_uframes_t pos,
-			   snd_pcm_uframes_t count)
+			   int channel, unsigned long pos, unsigned long count)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct nm256_stream *s = runtime->private_data;
-	count = frames_to_bytes(runtime, count);
-	pos = frames_to_bytes(runtime, pos);
+
 	memset_io(s->bufptr + pos, 0, count);
 	return 0;
 }
 
 static int
 snd_nm256_playback_copy(struct snd_pcm_substream *substream,
-			int channel, /* not used (interleaved data) */
-			snd_pcm_uframes_t pos,
-			void __user *src,
-			snd_pcm_uframes_t count)
+			int channel, unsigned long pos,
+			void __user *src, unsigned long count)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct nm256_stream *s = runtime->private_data;
-	count = frames_to_bytes(runtime, count);
-	pos = frames_to_bytes(runtime, pos);
+
 	if (copy_from_user_toio(s->bufptr + pos, src, count))
 		return -EFAULT;
 	return 0;
 }
 
+static int
+snd_nm256_playback_copy_kernel(struct snd_pcm_substream *substream,
+			       int channel, unsigned long pos,
+			       void *src, unsigned long count)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct nm256_stream *s = runtime->private_data;
+
+	memcpy_toio(s->bufptr + pos, src, count);
+	return 0;
+}
+
 /*
  * copy to user
  */
 static int
 snd_nm256_capture_copy(struct snd_pcm_substream *substream,
-		       int channel, /* not used (interleaved data) */
-		       snd_pcm_uframes_t pos,
-		       void __user *dst,
-		       snd_pcm_uframes_t count)
+		       int channel, unsigned long pos,
+		       void __user *dst, unsigned long count)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct nm256_stream *s = runtime->private_data;
-	count = frames_to_bytes(runtime, count);
-	pos = frames_to_bytes(runtime, pos);
+
 	if (copy_to_user_fromio(dst, s->bufptr + pos, count))
 		return -EFAULT;
 	return 0;
 }
 
+static int
+snd_nm256_capture_copy_kernel(struct snd_pcm_substream *substream,
+			      int channel, unsigned long pos,
+			      void *dst, unsigned long count)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct nm256_stream *s = runtime->private_data;
+
+	memcpy_fromio(dst, s->bufptr + pos, count);
+	return 0;
+}
+
 #endif /* !__i386__ */
 
 
@@ -911,8 +926,9 @@ static const struct snd_pcm_ops snd_nm256_playback_ops = {
 	.trigger =	snd_nm256_playback_trigger,
 	.pointer =	snd_nm256_playback_pointer,
 #ifndef __i386__
-	.copy =		snd_nm256_playback_copy,
-	.silence =	snd_nm256_playback_silence,
+	.copy_user =	snd_nm256_playback_copy,
+	.copy_kernel =	snd_nm256_playback_copy_kernel,
+	.fill_silence =	snd_nm256_playback_silence,
 #endif
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };
@@ -926,7 +942,8 @@ static const struct snd_pcm_ops snd_nm256_capture_ops = {
 	.trigger =	snd_nm256_capture_trigger,
 	.pointer =	snd_nm256_capture_pointer,
 #ifndef __i386__
-	.copy =		snd_nm256_capture_copy,
+	.copy_user =	snd_nm256_capture_copy,
+	.copy_kernel =	snd_nm256_capture_copy_kernel,
 #endif
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };