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Commit 9dd466ac authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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ALSA: fireface: unify protocol layer for FF400/FF800 



This commit moves codes for Fireface 400 to a file of former protocol.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent e199d1eb

sound/firewire/fireface/Makefile

+1 −2
Original line number Diff line number Diff line 
snd-fireface-objs := ff.o ff-transaction.o ff-midi.o ff-proc.o amdtp-ff.o \

		     ff-stream.o ff-pcm.o ff-hwdep.o ff-protocol-ff400.o \

		     ff-protocol-former.o

		     ff-stream.o ff-pcm.o ff-hwdep.o ff-protocol-former.o

obj-$(CONFIG_SND_FIREFACE) += snd-fireface.o

sound/firewire/fireface/ff-protocol-ff400.c

deleted100644 → 0
+0 −161
Original line number Diff line number Diff line 
/*

 * ff-protocol-ff400.c - a part of driver for RME Fireface series

 *

 * Copyright (c) 2015-2017 Takashi Sakamoto

 *

 * Licensed under the terms of the GNU General Public License, version 2.

 */



#include <linux/delay.h>

#include "ff.h"



#define FF400_STF		0x000080100500ull

#define FF400_RX_PACKET_FORMAT	0x000080100504ull

#define FF400_ISOC_COMM_START	0x000080100508ull

#define FF400_TX_PACKET_FORMAT	0x00008010050cull

#define FF400_ISOC_COMM_STOP	0x000080100510ull



/*

 * Fireface 400 manages isochronous channel number in 3 bit field. Therefore,

 * we can allocate between 0 and 7 channel.

 */

static int keep_resources(struct snd_ff *ff, unsigned int rate)

{

	enum snd_ff_stream_mode mode;

	int i;

	int err;



	// Check whether the given value is supported or not.

	for (i = 0; i < CIP_SFC_COUNT; i++) {

		if (amdtp_rate_table[i] == rate)

			break;

	}

	if (i >= CIP_SFC_COUNT)

		return -EINVAL;



	err = snd_ff_stream_get_multiplier_mode(i, &mode);

	if (err < 0)

		return err;



	/* Keep resources for in-stream. */

	ff->tx_resources.channels_mask = 0x00000000000000ffuLL;

	err = fw_iso_resources_allocate(&ff->tx_resources,

			amdtp_stream_get_max_payload(&ff->tx_stream),

			fw_parent_device(ff->unit)->max_speed);

	if (err < 0)

		return err;



	/* Keep resources for out-stream. */

	err = amdtp_ff_set_parameters(&ff->rx_stream, rate,

				      ff->spec->pcm_playback_channels[mode]);

	if (err < 0)

		return err;

	ff->rx_resources.channels_mask = 0x00000000000000ffuLL;

	err = fw_iso_resources_allocate(&ff->rx_resources,

			amdtp_stream_get_max_payload(&ff->rx_stream),

			fw_parent_device(ff->unit)->max_speed);

	if (err < 0)

		fw_iso_resources_free(&ff->tx_resources);



	return err;

}



static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)

{

	__le32 reg;

	int err;



	err = keep_resources(ff, rate);

	if (err < 0)

		return err;



	/* Set the number of data blocks transferred in a second. */

	reg = cpu_to_le32(rate);

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_STF, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	msleep(100);



	/*

	 * Set isochronous channel and the number of quadlets of received

	 * packets.

	 */

	reg = cpu_to_le32(((ff->rx_stream.data_block_quadlets << 3) << 8) |

			  ff->rx_resources.channel);

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_RX_PACKET_FORMAT, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	/*

	 * Set isochronous channel and the number of quadlets of transmitted

	 * packet.

	 */

	/* TODO: investigate the purpose of this 0x80. */

	reg = cpu_to_le32((0x80 << 24) |

			  (ff->tx_resources.channel << 5) |

			  (ff->tx_stream.data_block_quadlets));

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_TX_PACKET_FORMAT, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	/* Allow to transmit packets. */

	reg = cpu_to_le32(0x00000001);

	return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_ISOC_COMM_START, &reg, sizeof(reg), 0);

}



static void ff400_finish_session(struct snd_ff *ff)

{

	__le32 reg;



	reg = cpu_to_le32(0x80000000);

	snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

			   FF400_ISOC_COMM_STOP, &reg, sizeof(reg), 0);

}



static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)

{

	int i;



	for (i = 0; i < length / 4; i++) {

		u32 quad = le32_to_cpu(buf[i]);

		u8 byte;

		unsigned int index;

		struct snd_rawmidi_substream *substream;



		/* Message in first port. */

		/*

		 * This value may represent the index of this unit when the same

		 * units are on the same IEEE 1394 bus. This driver doesn't use

		 * it.

		 */

		index = (quad >> 8) & 0xff;

		if (index > 0) {

			substream = READ_ONCE(ff->tx_midi_substreams[0]);

			if (substream != NULL) {

				byte = quad & 0xff;

				snd_rawmidi_receive(substream, &byte, 1);

			}

		}



		/* Message in second port. */

		index = (quad >> 24) & 0xff;

		if (index > 0) {

			substream = READ_ONCE(ff->tx_midi_substreams[1]);

			if (substream != NULL) {

				byte = (quad >> 16) & 0xff;

				snd_rawmidi_receive(substream, &byte, 1);

			}

		}

	}

}



const struct snd_ff_protocol snd_ff_protocol_ff400 = {

	.handle_midi_msg	= ff400_handle_midi_msg,

	.begin_session		= ff400_begin_session,

	.finish_session		= ff400_finish_session,

};

sound/firewire/fireface/ff-protocol-former.c

+147 −0
Original line number Diff line number Diff line
@@ -140,3 +140,150 @@ const struct snd_ff_protocol snd_ff_protocol_ff800 = { 
	.begin_session		= ff800_begin_session,

	.finish_session		= ff800_finish_session,

};



#define FF400_STF		0x000080100500ull

#define FF400_RX_PACKET_FORMAT	0x000080100504ull

#define FF400_ISOC_COMM_START	0x000080100508ull

#define FF400_TX_PACKET_FORMAT	0x00008010050cull

#define FF400_ISOC_COMM_STOP	0x000080100510ull



/*

 * Fireface 400 manages isochronous channel number in 3 bit field. Therefore,

 * we can allocate between 0 and 7 channel.

 */

static int keep_resources(struct snd_ff *ff, unsigned int rate)

{

	enum snd_ff_stream_mode mode;

	int i;

	int err;



	// Check whether the given value is supported or not.

	for (i = 0; i < CIP_SFC_COUNT; i++) {

		if (amdtp_rate_table[i] == rate)

			break;

	}

	if (i >= CIP_SFC_COUNT)

		return -EINVAL;



	err = snd_ff_stream_get_multiplier_mode(i, &mode);

	if (err < 0)

		return err;



	/* Keep resources for in-stream. */

	ff->tx_resources.channels_mask = 0x00000000000000ffuLL;

	err = fw_iso_resources_allocate(&ff->tx_resources,

			amdtp_stream_get_max_payload(&ff->tx_stream),

			fw_parent_device(ff->unit)->max_speed);

	if (err < 0)

		return err;



	/* Keep resources for out-stream. */

	ff->rx_resources.channels_mask = 0x00000000000000ffuLL;

	err = fw_iso_resources_allocate(&ff->rx_resources,

			amdtp_stream_get_max_payload(&ff->rx_stream),

			fw_parent_device(ff->unit)->max_speed);

	if (err < 0)

		fw_iso_resources_free(&ff->tx_resources);



	return err;

}



static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)

{

	__le32 reg;

	int err;



	err = keep_resources(ff, rate);

	if (err < 0)

		return err;



	/* Set the number of data blocks transferred in a second. */

	reg = cpu_to_le32(rate);

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_STF, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	msleep(100);



	/*

	 * Set isochronous channel and the number of quadlets of received

	 * packets.

	 */

	reg = cpu_to_le32(((ff->rx_stream.data_block_quadlets << 3) << 8) |

			  ff->rx_resources.channel);

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_RX_PACKET_FORMAT, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	/*

	 * Set isochronous channel and the number of quadlets of transmitted

	 * packet.

	 */

	/* TODO: investigate the purpose of this 0x80. */

	reg = cpu_to_le32((0x80 << 24) |

			  (ff->tx_resources.channel << 5) |

			  (ff->tx_stream.data_block_quadlets));

	err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_TX_PACKET_FORMAT, &reg, sizeof(reg), 0);

	if (err < 0)

		return err;



	/* Allow to transmit packets. */

	reg = cpu_to_le32(0x00000001);

	return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

				 FF400_ISOC_COMM_START, &reg, sizeof(reg), 0);

}



static void ff400_finish_session(struct snd_ff *ff)

{

	__le32 reg;



	reg = cpu_to_le32(0x80000000);

	snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,

			   FF400_ISOC_COMM_STOP, &reg, sizeof(reg), 0);

}



static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)

{

	int i;



	for (i = 0; i < length / 4; i++) {

		u32 quad = le32_to_cpu(buf[i]);

		u8 byte;

		unsigned int index;

		struct snd_rawmidi_substream *substream;



		/* Message in first port. */

		/*

		 * This value may represent the index of this unit when the same

		 * units are on the same IEEE 1394 bus. This driver doesn't use

		 * it.

		 */

		index = (quad >> 8) & 0xff;

		if (index > 0) {

			substream = READ_ONCE(ff->tx_midi_substreams[0]);

			if (substream != NULL) {

				byte = quad & 0xff;

				snd_rawmidi_receive(substream, &byte, 1);

			}

		}



		/* Message in second port. */

		index = (quad >> 24) & 0xff;

		if (index > 0) {

			substream = READ_ONCE(ff->tx_midi_substreams[1]);

			if (substream != NULL) {

				byte = (quad >> 16) & 0xff;

				snd_rawmidi_receive(substream, &byte, 1);

			}

		}

	}

}



const struct snd_ff_protocol snd_ff_protocol_ff400 = {

	.handle_midi_msg	= ff400_handle_midi_msg,

	.begin_session		= ff400_begin_session,

	.finish_session		= ff400_finish_session,

};