diff options
| author | Chen Liangjun <b36089@freescale.com> | 2012-03-21 13:19:05 +0800 |
|---|---|---|
| committer | Chen Liangjun <b36089@freescale.com> | 2012-03-21 13:19:05 +0800 |
| commit | 4a19e4adeb26e282f0db380b1ec8622b26e3c178 (patch) | |
| tree | 17cafc71212a6cf8efab0b2974d44e24dc2776b5 /include | |
| parent | 06fe8bfc14dea44893cb692426b469f4497d277e (diff) | |
ENGR00171874 fix ASRC noise bug for i.MX6
Solve the ASRC noise:
1 change the DMA mode from normal mode to loop mode.
2 use dma_alloc_coherent alloc dma buffer instead of kzalloc.
Signed-off-by: Chen Liangjun <b36089@freescale.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mxc_asrc.h | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/include/linux/mxc_asrc.h b/include/linux/mxc_asrc.h index f0136f0502f0..c5b1d3e312ba 100644 --- a/include/linux/mxc_asrc.h +++ b/include/linux/mxc_asrc.h @@ -128,7 +128,9 @@ enum asrc_error_status { #ifdef __KERNEL__ -#define ASRC_DMA_BUFFER_NUM 8 +#define ASRC_DMA_BUFFER_NUM 2 +#define ASRC_INPUTFIFO_THRESHOLD 32 +#define ASRC_OUTPUTFIFO_THRESHOLD 32 #define ASRC_ASRCTR_REG 0x00 #define ASRC_ASRIER_REG 0x04 @@ -162,6 +164,13 @@ enum asrc_error_status { #define ASRC_ASRIDRLC_REG 0x94 #define ASRC_ASR76K_REG 0x98 #define ASRC_ASR56K_REG 0x9C +#define ASRC_ASRMCRA_REG 0xA0 +#define ASRC_ASRFSTA_REG 0xA4 +#define ASRC_ASRMCRB_REG 0xA8 +#define ASRC_ASRFSTB_REG 0xAC +#define ASRC_ASRMCRC_REG 0xB0 +#define ASRC_ASRFSTC_REG 0xB4 + struct dma_block { unsigned int index; @@ -190,13 +199,27 @@ struct asrc_pair_params { unsigned int buffer_num; unsigned int pair_hold; unsigned int asrc_active; + unsigned int channel_nums; + struct dma_block input_dma_total; struct dma_block input_dma[ASRC_DMA_BUFFER_NUM]; + struct dma_block output_dma_total; struct dma_block output_dma[ASRC_DMA_BUFFER_NUM]; struct semaphore busy_lock; + struct dma_async_tx_descriptor *desc_in; + struct dma_async_tx_descriptor *desc_out; }; struct asrc_data { struct asrc_pair asrc_pair[3]; + struct proc_dir_entry *proc_asrc; + unsigned long vaddr; + unsigned long paddr; + int dmarx[3]; + int dmatx[3]; + struct class *asrc_class; + int asrc_major; + struct imx_asrc_platform_data *mxc_asrc_data; + struct device *dev; }; extern int asrc_req_pair(int chn_num, enum asrc_pair_index *index); @@ -205,7 +228,8 @@ extern int asrc_config_pair(struct asrc_config *config); extern void asrc_get_status(struct asrc_status_flags *flags); extern void asrc_start_conv(enum asrc_pair_index index); extern void asrc_stop_conv(enum asrc_pair_index index); - +extern u32 asrc_get_per_addr(enum asrc_pair_index index, bool i); +extern int asrc_get_dma_request(enum asrc_pair_index index, bool i); #endif /* __kERNEL__ */ #endif /* __MXC_ASRC_H__ */ |