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-rw-r--r--sound/firewire/motu/Makefile2
-rw-r--r--sound/firewire/motu/motu-transaction.c117
-rw-r--r--sound/firewire/motu/motu.c10
-rw-r--r--sound/firewire/motu/motu.h12
4 files changed, 140 insertions, 1 deletions
diff --git a/sound/firewire/motu/Makefile b/sound/firewire/motu/Makefile
index 37391f5c623d..03b07694df66 100644
--- a/sound/firewire/motu/Makefile
+++ b/sound/firewire/motu/Makefile
@@ -1,2 +1,2 @@
-snd-firewire-motu-objs := motu.o amdtp-motu.o
+snd-firewire-motu-objs := motu.o amdtp-motu.o motu-transaction.o
obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
diff --git a/sound/firewire/motu/motu-transaction.c b/sound/firewire/motu/motu-transaction.c
new file mode 100644
index 000000000000..416dd9833896
--- /dev/null
+++ b/sound/firewire/motu/motu-transaction.c
@@ -0,0 +1,117 @@
+/*
+ * motu-transaction.c - a part of driver for MOTU FireWire series
+ *
+ * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+
+#include "motu.h"
+
+#define SND_MOTU_ADDR_BASE 0xfffff0000000ULL
+#define ASYNC_ADDR_HI 0x0b04
+#define ASYNC_ADDR_LO 0x0b08
+
+int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
+ size_t size)
+{
+ int tcode;
+
+ if (size % sizeof(__be32) > 0 || size <= 0)
+ return -EINVAL;
+ if (size == sizeof(__be32))
+ tcode = TCODE_READ_QUADLET_REQUEST;
+ else
+ tcode = TCODE_READ_BLOCK_REQUEST;
+
+ return snd_fw_transaction(motu->unit, tcode,
+ SND_MOTU_ADDR_BASE + offset, reg, size, 0);
+}
+
+int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg,
+ size_t size)
+{
+ int tcode;
+
+ if (size % sizeof(__be32) > 0 || size <= 0)
+ return -EINVAL;
+ if (size == sizeof(__be32))
+ tcode = TCODE_WRITE_QUADLET_REQUEST;
+ else
+ tcode = TCODE_WRITE_BLOCK_REQUEST;
+
+ return snd_fw_transaction(motu->unit, tcode,
+ SND_MOTU_ADDR_BASE + offset, reg, size, 0);
+}
+
+static void handle_message(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);
+}
+
+int snd_motu_transaction_reregister(struct snd_motu *motu)
+{
+ struct fw_device *device = fw_parent_device(motu->unit);
+ __be32 data;
+ int err;
+
+ if (motu->async_handler.callback_data == NULL)
+ return -EINVAL;
+
+ /* Register messaging address. Block transaction is not allowed. */
+ data = cpu_to_be32((device->card->node_id << 16) |
+ (motu->async_handler.offset >> 32));
+ err = snd_motu_transaction_write(motu, ASYNC_ADDR_HI, &data,
+ sizeof(data));
+ if (err < 0)
+ return err;
+
+ data = cpu_to_be32(motu->async_handler.offset);
+ return snd_motu_transaction_write(motu, ASYNC_ADDR_LO, &data,
+ sizeof(data));
+}
+
+int snd_motu_transaction_register(struct snd_motu *motu)
+{
+ static const struct fw_address_region resp_register_region = {
+ .start = 0xffffe0000000ull,
+ .end = 0xffffe000ffffull,
+ };
+ int err;
+
+ /* Perhaps, 4 byte messages are transferred. */
+ motu->async_handler.length = 4;
+ motu->async_handler.address_callback = handle_message;
+ motu->async_handler.callback_data = motu;
+
+ err = fw_core_add_address_handler(&motu->async_handler,
+ &resp_register_region);
+ if (err < 0)
+ return err;
+
+ err = snd_motu_transaction_reregister(motu);
+ if (err < 0) {
+ fw_core_remove_address_handler(&motu->async_handler);
+ motu->async_handler.address_callback = NULL;
+ }
+
+ return err;
+}
+
+void snd_motu_transaction_unregister(struct snd_motu *motu)
+{
+ __be32 data;
+
+ if (motu->async_handler.address_callback != NULL)
+ fw_core_remove_address_handler(&motu->async_handler);
+ motu->async_handler.address_callback = NULL;
+
+ /* Unregister the address. */
+ data = cpu_to_be32(0x00000000);
+ snd_motu_transaction_write(motu, ASYNC_ADDR_HI, &data, sizeof(data));
+ snd_motu_transaction_write(motu, ASYNC_ADDR_LO, &data, sizeof(data));
+}
diff --git a/sound/firewire/motu/motu.c b/sound/firewire/motu/motu.c
index 1e6fc74a6458..db6014c2f16d 100644
--- a/sound/firewire/motu/motu.c
+++ b/sound/firewire/motu/motu.c
@@ -54,6 +54,8 @@ static void name_card(struct snd_motu *motu)
static void motu_free(struct snd_motu *motu)
{
+ snd_motu_transaction_unregister(motu);
+
fw_unit_put(motu->unit);
mutex_destroy(&motu->mutex);
@@ -86,6 +88,10 @@ static void do_registration(struct work_struct *work)
name_card(motu);
+ err = snd_motu_transaction_register(motu);
+ if (err < 0)
+ goto error;
+
err = snd_card_register(motu->card);
if (err < 0)
goto error;
@@ -100,6 +106,7 @@ static void do_registration(struct work_struct *work)
return;
error:
+ snd_motu_transaction_unregister(motu);
snd_card_free(motu->card);
dev_info(&motu->unit->device,
"Sound card registration failed: %d\n", err);
@@ -155,6 +162,9 @@ static void motu_bus_update(struct fw_unit *unit)
/* Postpone a workqueue for deferred registration. */
if (!motu->registered)
snd_fw_schedule_registration(unit, &motu->dwork);
+
+ /* The handler address register becomes initialized. */
+ snd_motu_transaction_reregister(motu);
}
#define SND_MOTU_DEV_ENTRY(model, data) \
diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h
index cd1b3dd3e371..ed1d779c0dcc 100644
--- a/sound/firewire/motu/motu.h
+++ b/sound/firewire/motu/motu.h
@@ -48,6 +48,10 @@ struct snd_motu {
struct snd_motu_packet_format rx_packet_formats;
struct amdtp_stream tx_stream;
struct amdtp_stream rx_stream;
+
+ /* For notification. */
+ struct fw_address_handler async_handler;
+ u32 msg;
};
enum snd_motu_spec_flags {
@@ -106,4 +110,12 @@ int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
struct snd_motu_packet_format *formats);
int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime);
+
+int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
+ size_t size);
+int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg,
+ size_t size);
+int snd_motu_transaction_register(struct snd_motu *motu);
+int snd_motu_transaction_reregister(struct snd_motu *motu);
+void snd_motu_transaction_unregister(struct snd_motu *motu);
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-21 17:49:36 +0000