From: Pierre Yves MORDRET pierre-yves.mordret@st.com
From now on, DMA bitfield is to manage DMA FIFO Threshold.
Signed-off-by: Pierre-Yves MORDRET pierre-yves.mordret@st.com Signed-off-by: Vinod Koul vinod.koul@intel.com --- drivers/dma/stm32-dma.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 786fc8fcc38e..4099948b6914 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -116,6 +116,10 @@ #define STM32_DMA_MAX_DATA_PARAM 0x03 #define STM32_DMA_MAX_BURST 16
+/* DMA Features */ +#define STM32_DMA_THRESHOLD_FTR_MASK GENMASK(1, 0) +#define STM32_DMA_THRESHOLD_FTR_GET(n) ((n) & STM32_DMA_THRESHOLD_FTR_MASK) + enum stm32_dma_width { STM32_DMA_BYTE, STM32_DMA_HALF_WORD, @@ -129,11 +133,18 @@ enum stm32_dma_burst_size { STM32_DMA_BURST_INCR16, };
+/** + * struct stm32_dma_cfg - STM32 DMA custom configuration + * @channel_id: channel ID + * @request_line: DMA request + * @stream_config: 32bit mask specifying the DMA channel configuration + * @features: 32bit mask specifying the DMA Feature list + */ struct stm32_dma_cfg { u32 channel_id; u32 request_line; u32 stream_config; - u32 threshold; + u32 features; };
struct stm32_dma_chan_reg { @@ -171,6 +182,7 @@ struct stm32_dma_chan { u32 next_sg; struct dma_slave_config dma_sconfig; struct stm32_dma_chan_reg chan_reg; + u32 threshold; };
struct stm32_dma_device { @@ -976,7 +988,8 @@ static void stm32_dma_set_config(struct stm32_dma_chan *chan, /* Enable Interrupts */ chan->chan_reg.dma_scr |= STM32_DMA_SCR_TEIE | STM32_DMA_SCR_TCIE;
- chan->chan_reg.dma_sfcr = cfg->threshold & STM32_DMA_SFCR_FTH_MASK; + chan->threshold = STM32_DMA_THRESHOLD_FTR_GET(cfg->features); + chan->chan_reg.dma_sfcr = STM32_DMA_SFCR_FTH(chan->threshold); }
static struct dma_chan *stm32_dma_of_xlate(struct of_phandle_args *dma_spec, @@ -996,7 +1009,7 @@ static struct dma_chan *stm32_dma_of_xlate(struct of_phandle_args *dma_spec, cfg.channel_id = dma_spec->args[0]; cfg.request_line = dma_spec->args[1]; cfg.stream_config = dma_spec->args[2]; - cfg.threshold = dma_spec->args[3]; + cfg.features = dma_spec->args[3];
if ((cfg.channel_id >= STM32_DMA_MAX_CHANNELS) || (cfg.request_line >= STM32_DMA_MAX_REQUEST_ID)) {