projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 32 | if (offset == dg00x->async_handler.offset) | |
| 33 | handle_unknown_message(dg00x, offset, buf); | |
| 34 | ||
| 35 | fw_send_response(card, request, RCODE_COMPLETE); | |
| 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, | |
| 48 | DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR, | |
| 49 | &data, sizeof(data), 0); | |
| 50 | } | |
| 51 | ||
| 52 | int snd_dg00x_transaction_register(struct snd_dg00x *dg00x) | |
| 53 | { | |
| 54 | static const struct fw_address_region resp_register_region = { | |
| 55 | .start = 0xffffe0000000ull, | |
| 56 | .end = 0xffffe000ffffull, | |
| 57 | }; | |
| 58 | int err; | |
| 59 | ||
| 60 | dg00x->async_handler.length = 4; | |
| 61 | dg00x->async_handler.address_callback = handle_message; | |
| 62 | dg00x->async_handler.callback_data = dg00x; | |
| 63 | ||
| 64 | err = fw_core_add_address_handler(&dg00x->async_handler, | |
| 65 | &resp_register_region); | |
| 66 | if (err < 0) | |
| 67 | return err; | |
| 68 | ||
| 69 | err = snd_dg00x_transaction_reregister(dg00x); | |
| 70 | if (err < 0) { | |
| 71 | fw_core_remove_address_handler(&dg00x->async_handler); | |
| 72 | dg00x->async_handler.address_callback = NULL; | |
| 73 | } | |
| 74 | ||
| 75 | return err; | |
| 76 | } | |
| 77 | ||
| 78 | void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x) | |
| 79 | { | |
| 80 | fw_core_remove_address_handler(&dg00x->async_handler); | |
| 81 | } |