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ALSA: firewire-motu: code refactoring to handle model specific switch for protocol v2 

In MOTU FireWire series, devices which support protocol version 2 have
several types of hardware design to process audio data frames for isoc
packet. Roughly devices are categorized into three groups:
 - 828mkII
 - Traveler/896HD
 - UltraLite/8pre FireWire

Some bit flags in register addressed by 0x'ffff'f000'0b14
includes device-specific effects.

This commit cleanups implementation of protocol v2 in this point.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191030080644.1704-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-10-30 17:06:43 +09:00 committed by Takashi Iwai
parent 4b2079f80a
commit bd10737282
3 changed files with 43 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
sound/firewire/motu/motu-protocol-v2.c
View File

@ -12,10 +12,8 @@
#define V2_CLOCK_RATE_SHIFT 3
#define V2_CLOCK_SRC_MASK 0x00000007
#define V2_CLOCK_SRC_SHIFT 0
#define V2_CLOCK_TRAVELER_FETCH_DISABLE 0x04000000
#define V2_CLOCK_TRAVELER_FETCH_ENABLE 0x03000000
#define V2_CLOCK_8PRE_FETCH_DISABLE 0x02000000
#define V2_CLOCK_8PRE_FETCH_ENABLE 0x00000000
#define V2_CLOCK_FETCH_ENABLE 0x02000000
#define V2_CLOCK_MODEL_SPECIFIC 0x04000000
#define V2_IN_OUT_CONF_OFFSET 0x0c04
#define V2_OPT_OUT_IFACE_MASK 0x00000c00
@ -73,11 +71,6 @@ static int v2_set_clock_rate(struct snd_motu *motu, unsigned int rate)
data &= ~V2_CLOCK_RATE_MASK;
data |= i << V2_CLOCK_RATE_SHIFT;
if (motu->spec == &snd_motu_spec_traveler) {
data &= ~V2_CLOCK_TRAVELER_FETCH_ENABLE;
data |= V2_CLOCK_TRAVELER_FETCH_DISABLE;
}
reg = cpu_to_be32(data);
return snd_motu_transaction_write(motu, V2_CLOCK_STATUS_OFFSET, &reg,
sizeof(reg));
@ -145,42 +138,49 @@ static int v2_get_clock_source(struct snd_motu *motu,
static int v2_switch_fetching_mode(struct snd_motu *motu, bool enable)
{
enum snd_motu_clock_source src;
__be32 reg;
u32 data;
int err = 0;
if (motu->spec == &snd_motu_spec_traveler ||
motu->spec == &snd_motu_spec_8pre) {
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET,
&reg, sizeof(reg));
// 828mkII implements Altera ACEX 1K EP1K30. Nothing to do.
if (motu->spec == &snd_motu_spec_828mk2)
return 0;
err = snd_motu_transaction_read(motu, V2_CLOCK_STATUS_OFFSET, &reg,
sizeof(reg));
if (err < 0)
return err;
data = be32_to_cpu(reg);
err = get_clock_source(motu, data, &src);
if (err < 0)
return err;
data &= ~(V2_CLOCK_FETCH_ENABLE | V2_CLOCK_MODEL_SPECIFIC);
if (enable)
data |= V2_CLOCK_FETCH_ENABLE;
if (motu->spec->flags & SND_MOTU_SPEC_SUPPORT_CLOCK_X4) {
// Expected for Traveler and 896HD, which implements Altera
// Cyclone EP1C3.
data |= V2_CLOCK_MODEL_SPECIFIC;
} else {
// For UltraLite and 8pre, which implements Xilinx Spartan
// XC3S200.
unsigned int rate;
err = get_clock_rate(data, &rate);
if (err < 0)
return err;
data = be32_to_cpu(reg);
if (motu->spec == &snd_motu_spec_traveler) {
data &= ~(V2_CLOCK_TRAVELER_FETCH_DISABLE |
V2_CLOCK_TRAVELER_FETCH_ENABLE);
if (enable)
data |= V2_CLOCK_TRAVELER_FETCH_ENABLE;
else
data |= V2_CLOCK_TRAVELER_FETCH_DISABLE;
} else if (motu->spec == &snd_motu_spec_8pre) {
data &= ~(V2_CLOCK_8PRE_FETCH_DISABLE |
V2_CLOCK_8PRE_FETCH_ENABLE);
if (enable)
data |= V2_CLOCK_8PRE_FETCH_DISABLE;
else
data |= V2_CLOCK_8PRE_FETCH_ENABLE;
}
reg = cpu_to_be32(data);
err = snd_motu_transaction_write(motu, V2_CLOCK_STATUS_OFFSET,
&reg, sizeof(reg));
if (src == SND_MOTU_CLOCK_SOURCE_SPH && rate > 48000)
data |= V2_CLOCK_MODEL_SPECIFIC;
}
return err;
reg = cpu_to_be32(data);
return snd_motu_transaction_write(motu, V2_CLOCK_STATUS_OFFSET, &reg,
sizeof(reg));
}
static void calculate_fixed_part(struct snd_motu_packet_format *formats,

12
sound/firewire/motu/motu.c
View File

@ -172,7 +172,7 @@ static void motu_bus_update(struct fw_unit *unit)
snd_motu_transaction_reregister(motu);
}
static const struct snd_motu_spec motu_828mk2 = {
const struct snd_motu_spec snd_motu_spec_828mk2 = {
.name = "828mk2",
.protocol = &snd_motu_protocol_v2,
.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
@ -187,7 +187,7 @@ static const struct snd_motu_spec motu_828mk2 = {
.analog_out_ports = 8,
};
const struct snd_motu_spec snd_motu_spec_traveler = {
static const struct snd_motu_spec motu_traveler = {
.name = "Traveler",
.protocol = &snd_motu_protocol_v2,
.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
@ -202,7 +202,7 @@ const struct snd_motu_spec snd_motu_spec_traveler = {
.analog_out_ports = 8,
};
const struct snd_motu_spec snd_motu_spec_8pre = {
static const struct snd_motu_spec motu_8pre = {
.name = "8pre",
.protocol = &snd_motu_protocol_v2,
// In tx, use coax chunks for mix-return 1/2. In rx, use coax chunks for
@ -270,9 +270,9 @@ static const struct snd_motu_spec motu_4pre = {
}
static const struct ieee1394_device_id motu_id_table[] = {
SND_MOTU_DEV_ENTRY(0x000003, &motu_828mk2),
SND_MOTU_DEV_ENTRY(0x000009, &snd_motu_spec_traveler),
SND_MOTU_DEV_ENTRY(0x00000f, &snd_motu_spec_8pre),
SND_MOTU_DEV_ENTRY(0x000003, &snd_motu_spec_828mk2),
SND_MOTU_DEV_ENTRY(0x000009, &motu_traveler),
SND_MOTU_DEV_ENTRY(0x00000f, &motu_8pre),
SND_MOTU_DEV_ENTRY(0x000015, &motu_828mk3), /* FireWire only. */
SND_MOTU_DEV_ENTRY(0x000035, &motu_828mk3), /* Hybrid. */
SND_MOTU_DEV_ENTRY(0x000033, &motu_audio_express),

3
sound/firewire/motu/motu.h
View File

@ -130,8 +130,7 @@ struct snd_motu_spec {
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_traveler;
extern const struct snd_motu_spec snd_motu_spec_8pre;
extern const struct snd_motu_spec snd_motu_spec_828mk2;
int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
enum amdtp_stream_direction dir,