diff options
| author | Vinod Koul <vkoul@kernel.org> | 2020-08-24 20:29:52 +0530 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2021-05-26 23:21:55 +0530 |
| commit | bc81c264001b46bedc94a67917f6bbfc2b60218f (patch) | |
| tree | 40ff83e24d9ed9f90bc3afed9cea9fa57c923c36 | |
| parent | c6d418ca9279ff6a5ac9c6365e28398109539385 (diff) | |
soc: qcom: geni: Add support for gpi dma
GPI DMA is one of the DMA modes supported on geni, this adds support to
enable that mode
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
| -rw-r--r-- | drivers/soc/qcom/qcom-geni-se.c | 39 | ||||
| -rw-r--r-- | include/linux/qcom-geni-se.h | 4 |
2 files changed, 42 insertions, 1 deletions
diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 08d645b90ed3..7522d2488328 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -307,6 +307,39 @@ static void geni_se_select_dma_mode(struct geni_se *se) writel_relaxed(val, se->base + SE_GENI_DMA_MODE_EN); } +static int geni_se_select_gpi_mode(struct geni_se *se) +{ + unsigned int geni_dma_mode = 0; + unsigned int gpi_event_en = 0; + unsigned int common_geni_m_irq_en = 0; + unsigned int common_geni_s_irq_en = 0; + + common_geni_m_irq_en = readl_relaxed(se->base + SE_GENI_M_IRQ_EN); + common_geni_s_irq_en = readl_relaxed(se->base + SE_GENI_S_IRQ_EN); + common_geni_m_irq_en &= + ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN | + M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN); + common_geni_s_irq_en &= ~S_CMD_DONE_EN; + geni_dma_mode = readl_relaxed(se->base + SE_GENI_DMA_MODE_EN); + gpi_event_en = readl_relaxed(se->base + SE_GSI_EVENT_EN); + + geni_dma_mode |= GENI_DMA_MODE_EN; + gpi_event_en |= (DMA_RX_EVENT_EN | DMA_TX_EVENT_EN | + GENI_M_EVENT_EN | GENI_S_EVENT_EN); + + writel_relaxed(0, se->base + SE_IRQ_EN); + writel_relaxed(common_geni_s_irq_en, se->base + SE_GENI_S_IRQ_EN); + writel_relaxed(common_geni_m_irq_en, se->base + SE_GENI_M_IRQ_EN); + writel_relaxed(0xFFFFFFFF, se->base + SE_GENI_M_IRQ_CLEAR); + writel_relaxed(0xFFFFFFFF, se->base + SE_GENI_S_IRQ_CLEAR); + writel_relaxed(0xFFFFFFFF, se->base + SE_DMA_TX_IRQ_CLR); + writel_relaxed(0xFFFFFFFF, se->base + SE_DMA_RX_IRQ_CLR); + writel_relaxed(geni_dma_mode, se->base + SE_GENI_DMA_MODE_EN); + writel_relaxed(gpi_event_en, se->base + SE_GSI_EVENT_EN); + + return 0; +} + /** * geni_se_select_mode() - Select the serial engine transfer mode * @se: Pointer to the concerned serial engine. @@ -314,7 +347,8 @@ static void geni_se_select_dma_mode(struct geni_se *se) */ void geni_se_select_mode(struct geni_se *se, enum geni_se_xfer_mode mode) { - WARN_ON(mode != GENI_SE_FIFO && mode != GENI_SE_DMA); + WARN_ON(mode != GENI_SE_FIFO && mode != GENI_SE_DMA && + mode != GENI_GPI_DMA); switch (mode) { case GENI_SE_FIFO: @@ -323,6 +357,9 @@ void geni_se_select_mode(struct geni_se *se, enum geni_se_xfer_mode mode) case GENI_SE_DMA: geni_se_select_dma_mode(se); break; + case GENI_GPI_DMA: + geni_se_select_gpi_mode(se); + break; case GENI_SE_INVALID: default: break; diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h index e26de7b961ab..5924f0e5d60f 100644 --- a/include/linux/qcom-geni-se.h +++ b/include/linux/qcom-geni-se.h @@ -12,6 +12,7 @@ enum geni_se_xfer_mode { GENI_SE_INVALID, GENI_SE_FIFO, + GENI_GPI_DMA, GENI_SE_DMA, }; @@ -120,6 +121,9 @@ struct geni_se { #define CLK_DIV_MSK GENMASK(15, 4) #define CLK_DIV_SHFT 4 +/* GENI_IF_DISABLE_RO fields */ +#define FIFO_IF_DISABLE (BIT(0)) + /* GENI_FW_REVISION_RO fields */ #define FW_REV_PROTOCOL_MSK GENMASK(15, 8) #define FW_REV_PROTOCOL_SHFT 8 |