ALSA: firewire-motu: localize protocol data

This commit adds enumerations of protocol version to localize protocol
data.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200519111641.123211-4-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/motu/amdtp-motu.c

@@ -440,7 +440,7 @@ static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
 
 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
 		    enum amdtp_stream_direction dir,
-		    const struct snd_motu_protocol *const protocol)
+		    const struct snd_motu_spec *spec)
 {
 	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 	int fmt = CIP_FMT_MOTU;
@@ -454,14 +454,15 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
 		 * Units of version 3 transmits packets with invalid CIP header
 		 * against IEC 61883-1.
 		 */
-		if (protocol == &snd_motu_protocol_v3) {
+		if (spec->protocol_version == SND_MOTU_PROTOCOL_V3) {
 			flags |= CIP_WRONG_DBS |
 				 CIP_SKIP_DBC_ZERO_CHECK |
 				 CIP_HEADER_WITHOUT_EOH;
 			fmt = CIP_FMT_MOTU_TX_V3;
 		}
 
-		if (protocol == &snd_motu_protocol_v2) {
+		if (spec == &snd_motu_spec_8pre ||
+		    spec == &snd_motu_spec_ultralite) {
 			// 8pre has some quirks.
 			flags |= CIP_WRONG_DBS |
 				 CIP_SKIP_DBC_ZERO_CHECK;

sound/firewire/motu/motu-protocol-v2.c

@@ -293,7 +293,7 @@ static int v2_cache_packet_formats(struct snd_motu *motu)
 	return 0;
 }
 
-const struct snd_motu_protocol snd_motu_protocol_v2 = {
+static const struct snd_motu_protocol snd_motu_protocol_v2 = {
 	.get_clock_rate		= v2_get_clock_rate,
 	.set_clock_rate		= v2_set_clock_rate,
 	.get_clock_source	= v2_get_clock_source,
@@ -303,6 +303,7 @@ const struct snd_motu_protocol snd_motu_protocol_v2 = {
 
 const struct snd_motu_spec snd_motu_spec_828mk2 = {
 	.name = "828mk2",
+	.protocol_version = SND_MOTU_PROTOCOL_V2,
 	.protocol = &snd_motu_protocol_v2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
@@ -319,6 +320,7 @@ const struct snd_motu_spec snd_motu_spec_828mk2 = {
 const struct snd_motu_spec snd_motu_spec_traveler = {
 	.name = "Traveler",
 	.protocol = &snd_motu_protocol_v2,
+	.protocol_version = SND_MOTU_PROTOCOL_V2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
@@ -333,6 +335,7 @@ const struct snd_motu_spec snd_motu_spec_traveler = {
 
 const struct snd_motu_spec snd_motu_spec_ultralite = {
 	.name = "UltraLite",
+	.protocol_version = SND_MOTU_PROTOCOL_V2,
 	.protocol = &snd_motu_protocol_v2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK | // padding.
@@ -346,6 +349,7 @@ const struct snd_motu_spec snd_motu_spec_ultralite = {
 
 const struct snd_motu_spec snd_motu_spec_8pre = {
 	.name = "8pre",
+	.protocol_version = SND_MOTU_PROTOCOL_V2,
 	.protocol = &snd_motu_protocol_v2,
 	// In tx, use coax chunks for mix-return 1/2. In rx, use coax chunks for
 	// dummy 1/2.

sound/firewire/motu/motu-protocol-v3.c

@@ -307,7 +307,7 @@ static int v3_cache_packet_formats(struct snd_motu *motu)
 	return 0;
 }
 
-const struct snd_motu_protocol snd_motu_protocol_v3 = {
+static const struct snd_motu_protocol snd_motu_protocol_v3 = {
 	.get_clock_rate		= v3_get_clock_rate,
 	.set_clock_rate		= v3_set_clock_rate,
 	.get_clock_source	= v3_get_clock_source,
@@ -317,6 +317,7 @@ const struct snd_motu_protocol snd_motu_protocol_v3 = {
 
 const struct snd_motu_spec snd_motu_spec_828mk3 = {
 	.name = "828mk3",
+	.protocol_version = SND_MOTU_PROTOCOL_V3,
 	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
@@ -335,6 +336,7 @@ const struct snd_motu_spec snd_motu_spec_828mk3 = {
 
 const struct snd_motu_spec snd_motu_spec_audio_express = {
 	.name = "AudioExpress",
+	.protocol_version = SND_MOTU_PROTOCOL_V3,
 	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
@@ -348,6 +350,7 @@ const struct snd_motu_spec snd_motu_spec_audio_express = {
 
 const struct snd_motu_spec snd_motu_spec_4pre = {
 	.name = "4pre",
+	.protocol_version = SND_MOTU_PROTOCOL_V3,
 	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |

sound/firewire/motu/motu-stream.c

@@ -317,7 +317,7 @@ static int init_stream(struct snd_motu *motu, struct amdtp_stream *s)
 	if (err < 0)
 		return err;
 
-	err = amdtp_motu_init(s, motu->unit, dir, motu->spec->protocol);
+	err = amdtp_motu_init(s, motu->unit, dir, motu->spec);
 	if (err < 0)
 		fw_iso_resources_destroy(resources);
 

sound/firewire/motu/motu.h

@@ -108,6 +108,11 @@ enum snd_motu_clock_source {
 	SND_MOTU_CLOCK_SOURCE_UNKNOWN,
 };
 
+enum snd_motu_protocol_version {
+	SND_MOTU_PROTOCOL_V2,
+	SND_MOTU_PROTOCOL_V3,
+};
+
 struct snd_motu_protocol {
 	int (*get_clock_rate)(struct snd_motu *motu, unsigned int *rate);
 	int (*set_clock_rate)(struct snd_motu *motu, unsigned int rate);
@@ -119,6 +124,7 @@ struct snd_motu_protocol {
 
 struct snd_motu_spec {
 	const char *const name;
+	enum snd_motu_protocol_version protocol_version;
 	enum snd_motu_spec_flags flags;
 
 	unsigned char analog_in_ports;
@@ -127,9 +133,6 @@ struct snd_motu_spec {
 	const struct snd_motu_protocol *const protocol;
 };
 
-extern const struct snd_motu_protocol snd_motu_protocol_v2;
-extern const struct snd_motu_protocol snd_motu_protocol_v3;
-
 extern const struct snd_motu_spec snd_motu_spec_828mk2;
 extern const struct snd_motu_spec snd_motu_spec_traveler;
 extern const struct snd_motu_spec snd_motu_spec_ultralite;
@@ -141,7 +144,7 @@ extern const struct snd_motu_spec snd_motu_spec_4pre;
 
 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
 		    enum amdtp_stream_direction dir,
-		    const struct snd_motu_protocol *const protocol);
+		    const struct snd_motu_spec *spec);
 int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
 			      unsigned int midi_ports,
 			      struct snd_motu_packet_format *formats);