Signed-off-by: Sascha Hauer s.hauer@pengutronix.de ---
Notes: Changes since v1: - Drop unused variable sw_done_sel - Evaluate sdmac->direction directly instead of storing value in n_fifos
drivers/dma/imx-sdma.c | 57 +++++++++++++++++++++++++++ include/linux/platform_data/dma-imx.h | 7 ++++ 2 files changed, 64 insertions(+)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 1038f6bc7f846..f08c409231b7b 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -14,6 +14,7 @@ #include <linux/iopoll.h> #include <linux/module.h> #include <linux/types.h> +#include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/mm.h> #include <linux/interrupt.h> @@ -73,6 +74,7 @@ #define SDMA_CHNENBL0_IMX35 0x200 #define SDMA_CHNENBL0_IMX31 0x080 #define SDMA_CHNPRI_0 0x100 +#define SDMA_DONE0_CONFIG 0x1000
/* * Buffer descriptor status values. @@ -180,6 +182,12 @@ BIT(DMA_MEM_TO_DEV) | \ BIT(DMA_DEV_TO_DEV))
+#define SDMA_WATERMARK_LEVEL_N_FIFOS GENMASK(15, 12) +#define SDMA_WATERMARK_LEVEL_SW_DONE BIT(23) + +#define SDMA_DONE0_CONFIG_DONE_SEL BIT(7) +#define SDMA_DONE0_CONFIG_DONE_DIS BIT(6) + /** * struct sdma_script_start_addrs - SDMA script start pointers * @@ -441,6 +449,9 @@ struct sdma_channel { struct work_struct terminate_worker; struct list_head terminated; bool is_ram_script; + unsigned int n_fifos_src; + unsigned int n_fifos_dst; + bool sw_done; };
#define IMX_DMA_SG_LOOP BIT(0) @@ -773,6 +784,14 @@ static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event) val = readl_relaxed(sdma->regs + chnenbl); __set_bit(channel, &val); writel_relaxed(val, sdma->regs + chnenbl); + + /* Set SDMA_DONEx_CONFIG is sw_done enabled */ + if (sdmac->sw_done) { + val = readl_relaxed(sdma->regs + SDMA_DONE0_CONFIG); + val |= SDMA_DONE0_CONFIG_DONE_SEL; + val &= ~SDMA_DONE0_CONFIG_DONE_DIS; + writel_relaxed(val, sdma->regs + SDMA_DONE0_CONFIG); + } }
static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event) @@ -1022,6 +1041,10 @@ static int sdma_get_pc(struct sdma_channel *sdmac, case IMX_DMATYPE_IPU_MEMORY: emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr; break; + case IMX_DMATYPE_MULTI_SAI: + per_2_emi = sdma->script_addrs->sai_2_mcu_addr; + emi_2_per = sdma->script_addrs->mcu_2_sai_addr; + break; default: dev_err(sdma->dev, "Unsupported transfer type %d\n", peripheral_type); @@ -1198,6 +1221,22 @@ static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac) sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT; }
+static void sdma_set_watermarklevel_for_sais(struct sdma_channel *sdmac) +{ + unsigned int n_fifos; + + if (sdmac->sw_done) + sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SW_DONE; + + if (sdmac->direction == DMA_DEV_TO_MEM) + n_fifos = sdmac->n_fifos_src; + else + n_fifos = sdmac->n_fifos_dst; + + sdmac->watermark_level |= + FIELD_PREP(SDMA_WATERMARK_LEVEL_N_FIFOS, n_fifos); +} + static int sdma_config_channel(struct dma_chan *chan) { struct sdma_channel *sdmac = to_sdma_chan(chan); @@ -1234,6 +1273,10 @@ static int sdma_config_channel(struct dma_chan *chan) sdmac->peripheral_type == IMX_DMATYPE_ASRC) sdma_set_watermarklevel_for_p2p(sdmac); } else { + if (sdmac->peripheral_type == + IMX_DMATYPE_MULTI_SAI) + sdma_set_watermarklevel_for_sais(sdmac); + __set_bit(sdmac->event_id0, sdmac->event_mask); }
@@ -1691,9 +1734,23 @@ static int sdma_config(struct dma_chan *chan, struct dma_slave_config *dmaengine_cfg) { struct sdma_channel *sdmac = to_sdma_chan(chan); + struct sdma_engine *sdma = sdmac->sdma;
memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
+ if (dmaengine_cfg->peripheral_config) { + struct sdma_peripheral_config *sdmacfg = dmaengine_cfg->peripheral_config; + if (dmaengine_cfg->peripheral_size != sizeof(struct sdma_peripheral_config)) { + dev_err(sdma->dev, "Invalid peripheral size %zu, expected %zu\n", + dmaengine_cfg->peripheral_size, + sizeof(struct sdma_peripheral_config)); + return -EINVAL; + } + sdmac->n_fifos_src = sdmacfg->n_fifos_src; + sdmac->n_fifos_dst = sdmacfg->n_fifos_dst; + sdmac->sw_done = sdmacfg->sw_done; + } + /* Set ENBLn earlier to make sure dma request triggered after that */ if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) return -EINVAL; diff --git a/include/linux/platform_data/dma-imx.h b/include/linux/platform_data/dma-imx.h index 281adbb26e6bd..4a43a048e1b4d 100644 --- a/include/linux/platform_data/dma-imx.h +++ b/include/linux/platform_data/dma-imx.h @@ -39,6 +39,7 @@ enum sdma_peripheral_type { IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */ IMX_DMATYPE_ASRC_SP, /* Shared ASRC */ IMX_DMATYPE_SAI, /* SAI */ + IMX_DMATYPE_MULTI_SAI, /* MULTI FIFOs For Audio */ };
enum imx_dma_prio { @@ -65,4 +66,10 @@ static inline int imx_dma_is_general_purpose(struct dma_chan *chan) !strcmp(chan->device->dev->driver->name, "imx-dma"); }
+struct sdma_peripheral_config { + int n_fifos_src; + int n_fifos_dst; + bool sw_done; +}; + #endif