diff options
| author | Mathieu Sonet <contact@elasticsheep.com> | 2011-10-28 10:55:37 +0100 |
|---|---|---|
| committer | Andrzej Zaborowski <andrew.zaborowski@intel.com> | 2011-10-31 05:40:22 +0100 |
| commit | d028d02d0cb5faecb8270eca43066f13add72a29 (patch) | |
| tree | af1c77cdd1bffc12af5c4eabb782cea88b66a02e /hw/lm4549.h | |
| parent | 375847a6c0330e3de0fd1589eeb5a364692b791e (diff) | |
Add AACI audio playback support to the ARM Versatile/PB platform
This driver emulates the ARM AACI interface (PL041) connected to a LM4549 codec.
It enables audio playback for the Versatile/PB platform.
Limitations:
- Supports only a playback on one channel (Versatile/Vexpress)
- Supports only one TX FIFO in compact-mode or non-compact mode.
- Supports playback of 12, 16, 18 and 20 bits samples.
- Record is not supported.
- The PL041 is hardwired to a LM4549 codec.
Versatile/PB test build:
linux-2.6.38.5
buildroot-2010.11
alsa-lib-1.0.22
alsa-utils-1.0.22
mpg123-0.66
Qemu host: Ubuntu 10.04 in Vmware/OS X
Playback tested successfully with speaker-test/aplay/mpg123.
Signed-off-by: Mathieu Sonet <contact@elasticsheep.com>
[Peter Maydell: fixed typo in code clearing SL1RXBUSY/SL2RXBUSY
bits, as spotted by Andrzej Zaborowski]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
Diffstat (limited to 'hw/lm4549.h')
| -rw-r--r-- | hw/lm4549.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/hw/lm4549.h b/hw/lm4549.h new file mode 100644 index 000000000..70d0ac175 --- /dev/null +++ b/hw/lm4549.h @@ -0,0 +1,43 @@ +/* + * LM4549 Audio Codec Interface + * + * Copyright (c) 2011 + * Written by Mathieu Sonet - www.elasticsheep.com + * + * This code is licenced under the GPL. + * + * ***************************************************************** + */ + +#ifndef HW_LM4549_H +#define HW_LM4549_H + +#include "audio/audio.h" + +typedef void (*lm4549_callback)(void *opaque); + +#define LM4549_BUFFER_SIZE (512 * 2) /* 512 16-bit stereo samples */ + + +typedef struct { + QEMUSoundCard card; + SWVoiceOut *voice; + uint32_t voice_is_active; + + uint16_t regfile[128]; + lm4549_callback data_req_cb; + void *opaque; + + uint16_t buffer[LM4549_BUFFER_SIZE]; + uint32_t buffer_level; +} lm4549_state; + +extern const VMStateDescription vmstate_lm4549_state; + + +void lm4549_init(lm4549_state *s, lm4549_callback data_req, void *opaque); +uint32_t lm4549_read(lm4549_state *s, target_phys_addr_t offset); +void lm4549_write(lm4549_state *s, target_phys_addr_t offset, uint32_t value); +uint32_t lm4549_write_samples(lm4549_state *s, uint32_t left, uint32_t right); + +#endif /* #ifndef HW_LM4549_H */ |