84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* digi00x-transaction.c - a part of driver for Digidesign Digi 002/003 family
|
|
*
|
|
* Copyright (c) 2014-2015 Takashi Sakamoto
|
|
*/
|
|
|
|
#include <sound/asound.h>
|
|
#include "digi00x.h"
|
|
|
|
static void handle_unknown_message(struct snd_dg00x *dg00x,
|
|
unsigned long long offset, __be32 *buf)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dg00x->lock, flags);
|
|
dg00x->msg = be32_to_cpu(*buf);
|
|
spin_unlock_irqrestore(&dg00x->lock, flags);
|
|
|
|
wake_up(&dg00x->hwdep_wait);
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct snd_dg00x *dg00x = callback_data;
|
|
__be32 *buf = (__be32 *)data;
|
|
|
|
fw_send_response(card, request, RCODE_COMPLETE);
|
|
|
|
if (offset == dg00x->async_handler.offset)
|
|
handle_unknown_message(dg00x, offset, buf);
|
|
}
|
|
|
|
int snd_dg00x_transaction_reregister(struct snd_dg00x *dg00x)
|
|
{
|
|
struct fw_device *device = fw_parent_device(dg00x->unit);
|
|
__be32 data[2];
|
|
|
|
/* Unknown. 4bytes. */
|
|
data[0] = cpu_to_be32((device->card->node_id << 16) |
|
|
(dg00x->async_handler.offset >> 32));
|
|
data[1] = cpu_to_be32(dg00x->async_handler.offset);
|
|
return snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
|
|
DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR,
|
|
&data, sizeof(data), 0);
|
|
}
|
|
|
|
void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x)
|
|
{
|
|
if (dg00x->async_handler.callback_data == NULL)
|
|
return;
|
|
|
|
fw_core_remove_address_handler(&dg00x->async_handler);
|
|
|
|
dg00x->async_handler.callback_data = NULL;
|
|
}
|
|
|
|
int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
|
|
{
|
|
static const struct fw_address_region resp_register_region = {
|
|
.start = 0xffffe0000000ull,
|
|
.end = 0xffffe000ffffull,
|
|
};
|
|
int err;
|
|
|
|
dg00x->async_handler.length = 4;
|
|
dg00x->async_handler.address_callback = handle_message;
|
|
dg00x->async_handler.callback_data = dg00x;
|
|
|
|
err = fw_core_add_address_handler(&dg00x->async_handler,
|
|
&resp_register_region);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = snd_dg00x_transaction_reregister(dg00x);
|
|
if (err < 0)
|
|
snd_dg00x_transaction_unregister(dg00x);
|
|
|
|
return err;
|
|
}
|