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