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1 | /* |
2 | * Driver for the Atmel AC97C controller |
3 | * |
4 | * Copyright (C) 2005-2009 Atmel Corporation |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License version 2 as published |
8 | * by the Free Software Foundation. |
9 | */ |
10 | #ifndef __INCLUDE_SOUND_ATMEL_AC97C_H |
11 | #define __INCLUDE_SOUND_ATMEL_AC97C_H |
12 | |
13 | #include <linux/dw_dmac.h> |
14 | |
15 | #define AC97C_CAPTURE 0x01 |
16 | #define AC97C_PLAYBACK 0x02 |
17 | #define AC97C_BOTH (AC97C_CAPTURE | AC97C_PLAYBACK) |
18 | |
19 | /** |
20 | * struct atmel_ac97c_pdata - board specific AC97C configuration |
21 | * @rx_dws: DMA slave interface to use for sound capture. |
22 | * @tx_dws: DMA slave interface to use for sound playback. |
23 | * @reset_pin: GPIO pin wired to the reset input on the external AC97 codec, |
24 | * optional to use, set to -ENODEV if not in use. AC97 layer will |
25 | * try to do a software reset of the external codec anyway. |
26 | * @flags: Flags for which directions should be enabled. |
27 | * |
28 | * If the user do not want to use a DMA channel for playback or capture, i.e. |
29 | * only one feature is required on the board. The slave for playback or capture |
30 | * can be set to NULL. The AC97C driver will take use of this when setting up |
31 | * the sound streams. |
32 | */ |
33 | struct ac97c_platform_data { |
34 | struct dw_dma_slave rx_dws; |
35 | struct dw_dma_slave tx_dws; |
36 | unsigned int flags; |
37 | int reset_pin; |
38 | }; |
39 | |
40 | #endif /* __INCLUDE_SOUND_ATMEL_AC97C_H */ |
41 |
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