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44b73088 TS |
1 | /* |
2 | * digi00x-transaction.c - a part of driver for Digidesign Digi 002/003 family | |
3 | * | |
4 | * Copyright (c) 2014-2015 Takashi Sakamoto | |
5 | * | |
6 | * Licensed under the terms of the GNU General Public License, version 2. | |
7 | */ | |
8 | ||
9 | #include <sound/asound.h> | |
10 | #include "digi00x.h" | |
11 | ||
12 | static void handle_unknown_message(struct snd_dg00x *dg00x, | |
13 | unsigned long long offset, __be32 *buf) | |
14 | { | |
15 | unsigned long flags; | |
16 | ||
17 | spin_lock_irqsave(&dg00x->lock, flags); | |
18 | dg00x->msg = be32_to_cpu(*buf); | |
19 | spin_unlock_irqrestore(&dg00x->lock, flags); | |
20 | ||
21 | wake_up(&dg00x->hwdep_wait); | |
22 | } | |
23 | ||
24 | static void handle_message(struct fw_card *card, struct fw_request *request, | |
25 | int tcode, int destination, int source, | |
26 | int generation, unsigned long long offset, | |
27 | void *data, size_t length, void *callback_data) | |
28 | { | |
29 | struct snd_dg00x *dg00x = callback_data; | |
30 | __be32 *buf = (__be32 *)data; | |
31 | ||
fdb2b2ee TS |
32 | fw_send_response(card, request, RCODE_COMPLETE); |
33 | ||
44b73088 TS |
34 | if (offset == dg00x->async_handler.offset) |
35 | handle_unknown_message(dg00x, offset, buf); | |
44b73088 TS |
36 | } |
37 | ||
38 | int snd_dg00x_transaction_reregister(struct snd_dg00x *dg00x) | |
39 | { | |
40 | struct fw_device *device = fw_parent_device(dg00x->unit); | |
41 | __be32 data[2]; | |
42 | ||
43 | /* Unknown. 4bytes. */ | |
44 | data[0] = cpu_to_be32((device->card->node_id << 16) | | |
45 | (dg00x->async_handler.offset >> 32)); | |
46 | data[1] = cpu_to_be32(dg00x->async_handler.offset); | |
47 | return snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST, | |
fdb2b2ee | 48 | DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR, |
3646a54a | 49 | &data, sizeof(data), 0); |
44b73088 TS |
50 | } |
51 | ||
fdb2b2ee TS |
52 | void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x) |
53 | { | |
54 | if (dg00x->async_handler.callback_data == NULL) | |
55 | return; | |
56 | ||
57 | fw_core_remove_address_handler(&dg00x->async_handler); | |
58 | ||
59 | dg00x->async_handler.callback_data = NULL; | |
60 | } | |
61 | ||
44b73088 TS |
62 | int snd_dg00x_transaction_register(struct snd_dg00x *dg00x) |
63 | { | |
64 | static const struct fw_address_region resp_register_region = { | |
65 | .start = 0xffffe0000000ull, | |
66 | .end = 0xffffe000ffffull, | |
67 | }; | |
68 | int err; | |
69 | ||
fdb2b2ee | 70 | dg00x->async_handler.length = 4; |
44b73088 TS |
71 | dg00x->async_handler.address_callback = handle_message; |
72 | dg00x->async_handler.callback_data = dg00x; | |
73 | ||
74 | err = fw_core_add_address_handler(&dg00x->async_handler, | |
75 | &resp_register_region); | |
76 | if (err < 0) | |
77 | return err; | |
78 | ||
79 | err = snd_dg00x_transaction_reregister(dg00x); | |
b47f525f | 80 | if (err < 0) |
fdb2b2ee | 81 | snd_dg00x_transaction_unregister(dg00x); |
44b73088 TS |
82 | |
83 | return err; | |
44b73088 | 84 | } |