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Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/include/asm/audionode.h')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/include/asm/audionode.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/audionode.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/audionode.h new file mode 100644 index 000000000..f18a0e817 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/audionode.h @@ -0,0 +1,152 @@ +/* + * audionode.h + * audionode and DMA descriptors + * + * Copyright 2009 Ubicom Inc. <www.ubicom.com>. All rights reserved. + * + * This file contains confidential information of Ubicom, Inc. and your use of + * this file is subject to the Ubicom Software License Agreement distributed with + * this file. If you are uncertain whether you are an authorized user or to report + * any unauthorized use, please contact Ubicom, Inc. at +1-408-789-2200. + * Unauthorized reproduction or distribution of this file is subject to civil and + * criminal penalties. + * + */ +#ifndef _AUDIONODE_H_ +#define _AUDIONODE_H_ + +#define AUDIO_INT_FLAG_MORE_SAMPLES 0x00000001 +#define AUDIO_INT_FLAG_COMMAND 0x00000002 + +/* + * Commands the Primary OS sends to the audio device + */ +enum audio_command { + AUDIO_CMD_NONE, + AUDIO_CMD_START, + AUDIO_CMD_STOP, + AUDIO_CMD_PAUSE, + AUDIO_CMD_RESUME, + AUDIO_CMD_MUTE, + AUDIO_CMD_UNMUTE, + AUDIO_CMD_SETUP, + AUDIO_CMD_ENABLE, + AUDIO_CMD_DISABLE, +}; + +/* + * Flag bits passed in the registers + */ +#define CMD_START_FLAG_LE (1 << 0) /* Use Little Endian Mode */ + +/* + * Status bits that audio device can set to indicate reason + * for interrupting the Primary OS + */ +#define AUDIO_STATUS_PLAY_DMA0_REQUEST (1 << 0) /* Audio device needs samples in DMA0 for playback */ +#define AUDIO_STATUS_PLAY_DMA1_REQUEST (1 << 1) /* Audio device needs samples in DMA1 for playback */ + +struct audio_dma { + /* + * NOTE: The active flag shall only be SET by the producer and CLEARED + * by the consumer, NEVER the other way around. For playback, the + * Primary OS sets this flag and ipAudio clears it. + * + * The producer shall not modify the ptr or ctr fields when the transfer + * is marked as active, as these are used by the consumer to do the + * transfer. + */ + volatile u32_t active; /* Nonzero if data in ptr/ctr ready to be transferred */ + volatile void *ptr; /* Pointer to data to be transferred */ + volatile u32_t ctr; /* Counter: number of data units to transfer */ +}; + +#define AUDIONODE_CAP_BE (1 << 0) +#define AUDIONODE_CAP_LE (1 << 1) + +#define AUDIONODE_VERSION 7 +struct audio_node { + struct devtree_node dn; + + /* + * Version of this node + */ + u32_t version; + + /* + * Pointer to the registers + */ + struct audio_regs *regs; +}; + +/* + * [OCM] Audio registers + * Registers exposed as part of our MMIO area + */ +#define AUDIO_REGS_VERSION 7 +struct audio_regs { + /* + * Version of this register set + */ + u32_t version; + + /* + * Interrupt status + */ + volatile u32_t int_status; + + /* + * Interrupt request + */ + volatile u32_t int_req; + + /* + * Current IRQ being serviced + */ + u32_t cur_irq; + + /* + * Maximum number of devices supported + */ + u32_t max_devs; + + /* + * [DDR] Device registers for each of the devices + */ + struct audio_dev_regs *adr; +}; + +#define AUDIO_DEV_REGS_VERSION 2 +struct audio_dev_regs { + u32_t version; /* Version of this register set */ + + u8_t name[32]; /* Name of this driver */ + u32_t caps; /* Capabilities of this driver */ + const u32_t *sample_rates; /* Sample Rates supported by this driver */ + u32_t n_sample_rates; /* Number of sample rates supported by this driver */ + u32_t channel_mask; /* A bit set in a particular position means we support this channel configuration */ + volatile u32_t int_flags; /* Reason for interrupting audio device */ + volatile enum audio_command command; /* Command from Primary OS */ + volatile u32_t flags; /* Flag bits for this command */ + volatile u32_t channels; /* Number of channels */ + volatile u32_t sample_rate; /* Sample rate */ + volatile u32_t status; /* Status bits sent from ipAudio to Primary OS */ + void *primary_os_buffer_ptr; /* + * Playback: Pointer to next sample to be removed from + * Primary OS sample buffer + * Capture: Pointer to where next sample will be inserted + * into Primary OS sample buffer + */ + + /* + * These are the transfer requests. They are used in alternating + * order so that when ipAudio is processing one request, the + * Primary OS can fill in the other one. + * + * NOTE: The active bit shall always be SET by the producer and + * CLEARED by the consumer, NEVER the other way around. + */ + struct audio_dma dma_xfer_requests[2]; +}; + +#endif |