1*da607e19SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
244b73088STakashi Sakamoto /*
344b73088STakashi Sakamoto * digi00x-transaction.c - a part of driver for Digidesign Digi 002/003 family
444b73088STakashi Sakamoto *
544b73088STakashi Sakamoto * Copyright (c) 2014-2015 Takashi Sakamoto
644b73088STakashi Sakamoto */
744b73088STakashi Sakamoto
844b73088STakashi Sakamoto #include <sound/asound.h>
944b73088STakashi Sakamoto #include "digi00x.h"
1044b73088STakashi Sakamoto
handle_unknown_message(struct snd_dg00x * dg00x,unsigned long long offset,__be32 * buf)1144b73088STakashi Sakamoto static void handle_unknown_message(struct snd_dg00x *dg00x,
1244b73088STakashi Sakamoto unsigned long long offset, __be32 *buf)
1344b73088STakashi Sakamoto {
1444b73088STakashi Sakamoto unsigned long flags;
1544b73088STakashi Sakamoto
1644b73088STakashi Sakamoto spin_lock_irqsave(&dg00x->lock, flags);
1744b73088STakashi Sakamoto dg00x->msg = be32_to_cpu(*buf);
1844b73088STakashi Sakamoto spin_unlock_irqrestore(&dg00x->lock, flags);
1944b73088STakashi Sakamoto
2044b73088STakashi Sakamoto wake_up(&dg00x->hwdep_wait);
2144b73088STakashi Sakamoto }
2244b73088STakashi Sakamoto
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)2344b73088STakashi Sakamoto static void handle_message(struct fw_card *card, struct fw_request *request,
2444b73088STakashi Sakamoto int tcode, int destination, int source,
2544b73088STakashi Sakamoto int generation, unsigned long long offset,
2644b73088STakashi Sakamoto void *data, size_t length, void *callback_data)
2744b73088STakashi Sakamoto {
2844b73088STakashi Sakamoto struct snd_dg00x *dg00x = callback_data;
2944b73088STakashi Sakamoto __be32 *buf = (__be32 *)data;
3044b73088STakashi Sakamoto
31fdb2b2eeSTakashi Sakamoto fw_send_response(card, request, RCODE_COMPLETE);
32fdb2b2eeSTakashi Sakamoto
3344b73088STakashi Sakamoto if (offset == dg00x->async_handler.offset)
3444b73088STakashi Sakamoto handle_unknown_message(dg00x, offset, buf);
3544b73088STakashi Sakamoto }
3644b73088STakashi Sakamoto
snd_dg00x_transaction_reregister(struct snd_dg00x * dg00x)3744b73088STakashi Sakamoto int snd_dg00x_transaction_reregister(struct snd_dg00x *dg00x)
3844b73088STakashi Sakamoto {
3944b73088STakashi Sakamoto struct fw_device *device = fw_parent_device(dg00x->unit);
4044b73088STakashi Sakamoto __be32 data[2];
4144b73088STakashi Sakamoto
4244b73088STakashi Sakamoto /* Unknown. 4bytes. */
4344b73088STakashi Sakamoto data[0] = cpu_to_be32((device->card->node_id << 16) |
4444b73088STakashi Sakamoto (dg00x->async_handler.offset >> 32));
4544b73088STakashi Sakamoto data[1] = cpu_to_be32(dg00x->async_handler.offset);
46fdb2b2eeSTakashi Sakamoto return snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
4744b73088STakashi Sakamoto DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR,
4844b73088STakashi Sakamoto &data, sizeof(data), 0);
49fdb2b2eeSTakashi Sakamoto }
503646a54aSTakashi Sakamoto
snd_dg00x_transaction_unregister(struct snd_dg00x * dg00x)51fdb2b2eeSTakashi Sakamoto void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x)
52fdb2b2eeSTakashi Sakamoto {
53fdb2b2eeSTakashi Sakamoto if (dg00x->async_handler.callback_data == NULL)
54fdb2b2eeSTakashi Sakamoto return;
55fdb2b2eeSTakashi Sakamoto
56fdb2b2eeSTakashi Sakamoto fw_core_remove_address_handler(&dg00x->async_handler);
57fdb2b2eeSTakashi Sakamoto
58fdb2b2eeSTakashi Sakamoto dg00x->async_handler.callback_data = NULL;
5944b73088STakashi Sakamoto }
6044b73088STakashi Sakamoto
snd_dg00x_transaction_register(struct snd_dg00x * dg00x)6144b73088STakashi Sakamoto int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
6244b73088STakashi Sakamoto {
6344b73088STakashi Sakamoto static const struct fw_address_region resp_register_region = {
6444b73088STakashi Sakamoto .start = 0xffffe0000000ull,
6544b73088STakashi Sakamoto .end = 0xffffe000ffffull,
6644b73088STakashi Sakamoto };
6744b73088STakashi Sakamoto int err;
6844b73088STakashi Sakamoto
69fdb2b2eeSTakashi Sakamoto dg00x->async_handler.length = 4;
7044b73088STakashi Sakamoto dg00x->async_handler.address_callback = handle_message;
7144b73088STakashi Sakamoto dg00x->async_handler.callback_data = dg00x;
7244b73088STakashi Sakamoto
7344b73088STakashi Sakamoto err = fw_core_add_address_handler(&dg00x->async_handler,
7444b73088STakashi Sakamoto &resp_register_region);
7544b73088STakashi Sakamoto if (err < 0)
7644b73088STakashi Sakamoto return err;
7744b73088STakashi Sakamoto
7844b73088STakashi Sakamoto err = snd_dg00x_transaction_reregister(dg00x);
79b47f525fSTakashi Sakamoto if (err < 0)
80fdb2b2eeSTakashi Sakamoto snd_dg00x_transaction_unregister(dg00x);
81b47f525fSTakashi Sakamoto
82b47f525fSTakashi Sakamoto return err;
8344b73088STakashi Sakamoto }
84