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: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/oxfw/oxfw-scs1x.c | 69 +++++++++++++++++++++++++++++++++++++++- sound/firewire/oxfw/oxfw.h | 1 + 2 files changed, 69 insertions(+), 1 deletion(-)
diff --git a/sound/firewire/oxfw/oxfw-scs1x.c b/sound/firewire/oxfw/oxfw-scs1x.c index 34db0d0..4a2a7ff 100644 --- a/sound/firewire/oxfw/oxfw-scs1x.c +++ b/sound/firewire/oxfw/oxfw-scs1x.c @@ -9,18 +9,85 @@
#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); + scs->hss_handler.length = 0; +} + +void snd_oxfw_scs1x_update(struct snd_oxfw *oxfw) +{ + struct fw_scs1x *scs = oxfw->spec; + + if (scs->hss_handler.length > 0) + 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; } diff --git a/sound/firewire/oxfw/oxfw.h b/sound/firewire/oxfw/oxfw.h index cbf00ee..9beecc2 100644 --- a/sound/firewire/oxfw/oxfw.h +++ b/sound/firewire/oxfw/oxfw.h @@ -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);