Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e3315b43 authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
Browse files

ALSA: oxfw: allocate own address region for SCS.1 series 



When physical controls on SCS.1 models are operated, the models transfer
MIDI messages in asynchronous transactions on IEEE 1394 bus. The models
have a register to have an address for the transactions, and drivers
can register own address for this purpose.

This commit keeps a region of address, registers it and adds a handler for
the transactions.

Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3f47152a

sound/firewire/oxfw/oxfw-scs1x.c

+64 −1
Original line number Diff line number Diff line
@@ -9,18 +9,81 @@ 


#include "oxfw.h"



#define HSS1394_ADDRESS			0xc007dedadadaULL

#define HSS1394_MAX_PACKET_SIZE		64

#define HSS1394_TAG_CHANGE_ADDRESS	0xf1



struct fw_scs1x {

	struct fw_address_handler hss_handler;

};



static void handle_hss(struct fw_card *card, struct fw_request *request,

		       int tcode, int destination, int source, int generation,

		       unsigned long long offset, void *data, size_t length,

		       void *callback_data)

{

	fw_send_response(card, request, RCODE_COMPLETE);

}



static int register_address(struct snd_oxfw *oxfw)

{

	struct fw_scs1x *scs = oxfw->spec;

	__be64 data;



	data = cpu_to_be64(((u64)HSS1394_TAG_CHANGE_ADDRESS << 56) |

			    scs->hss_handler.offset);

	return snd_fw_transaction(oxfw->unit, TCODE_WRITE_BLOCK_REQUEST,

				  HSS1394_ADDRESS, &data, sizeof(data), 0);

}



static void remove_scs1x(struct snd_rawmidi *rmidi)

{

	struct fw_scs1x *scs = rmidi->private_data;



	fw_core_remove_address_handler(&scs->hss_handler);

}



void snd_oxfw_scs1x_update(struct snd_oxfw *oxfw)

{

	register_address(oxfw);

}



int snd_oxfw_scs1x_add(struct snd_oxfw *oxfw)

{

	struct snd_rawmidi *rmidi;

	struct fw_scs1x *scs;

	int err;



	scs = kzalloc(sizeof(struct fw_scs1x), GFP_KERNEL);

	if (scs == NULL)

		return -ENOMEM;

	oxfw->spec = scs;



	/* Allocate own handler for imcoming asynchronous transaction. */

	scs->hss_handler.length = HSS1394_MAX_PACKET_SIZE;

	scs->hss_handler.address_callback = handle_hss;

	scs->hss_handler.callback_data = scs;

	err = fw_core_add_address_handler(&scs->hss_handler,

					  &fw_high_memory_region);

	if (err < 0)

		return err;



	err = register_address(oxfw);

	if (err < 0)

		goto err_allocated;



	/* Use unique name for backward compatibility to scs1x module. */

	err = snd_rawmidi_new(oxfw->card, "SCS.1x", 0, 0, 0, &rmidi);

	if (err < 0)

		return err;

		goto err_allocated;

	rmidi->private_data = scs;

	rmidi->private_free = remove_scs1x;



	snprintf(rmidi->name, sizeof(rmidi->name),

		 "%s MIDI", oxfw->card->shortname);



	return 0;

err_allocated:

	fw_core_remove_address_handler(&scs->hss_handler);

	return err;

}

sound/firewire/oxfw/oxfw.h

+1 −0
Original line number Diff line number Diff line
@@ -135,3 +135,4 @@ int snd_oxfw_create_hwdep(struct snd_oxfw *oxfw); 


int snd_oxfw_add_spkr(struct snd_oxfw *oxfw, bool is_lacie);

int snd_oxfw_scs1x_add(struct snd_oxfw *oxfw);

void snd_oxfw_scs1x_update(struct snd_oxfw *oxfw);