dmaengine: dw-axi-dmac: Add Intel KeemBay DMA register fields

Add support for Intel KeemBay DMA registers. These registers are required
to run data transfer between device to memory and memory to device on Intel
KeemBay SoC.

Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com>
Tested-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Link: https://lore.kernel.org/r/20210125013255.25799-12-jee.heng.sia@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
index 46baf93..3a357f7 100644 (file)
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
@@ -63,6 +63,7 @@ struct axi_dma_chip {
        struct device           *dev;
        int                     irq;
        void __iomem            *regs;
+       void __iomem            *apb_regs;
        struct clk              *core_clk;
        struct clk              *cfgr_clk;
        struct dw_axi_dma       *dw;
@@ -169,6 +170,19 @@ static inline struct axi_dma_chan *dchan_to_axi_dma_chan(struct dma_chan *dchan)
 #define CH_INTSIGNAL_ENA       0x090 /* R/W Chan Interrupt Signal Enable */
 #define CH_INTCLEAR            0x098 /* W Chan Interrupt Clear */
 
+/* These Apb registers are used by Intel KeemBay SoC */
+#define DMAC_APB_CFG           0x000 /* DMAC Apb Configuration Register */
+#define DMAC_APB_STAT          0x004 /* DMAC Apb Status Register */
+#define DMAC_APB_DEBUG_STAT_0  0x008 /* DMAC Apb Debug Status Register 0 */
+#define DMAC_APB_DEBUG_STAT_1  0x00C /* DMAC Apb Debug Status Register 1 */
+#define DMAC_APB_HW_HS_SEL_0   0x010 /* DMAC Apb HW HS register 0 */
+#define DMAC_APB_HW_HS_SEL_1   0x014 /* DMAC Apb HW HS register 1 */
+#define DMAC_APB_LPI           0x018 /* DMAC Apb Low Power Interface Reg */
+#define DMAC_APB_BYTE_WR_CH_EN 0x01C /* DMAC Apb Byte Write Enable */
+#define DMAC_APB_HALFWORD_WR_CH_EN     0x020 /* DMAC Halfword write enables */
+
+#define UNUSED_CHANNEL         0x3F /* Set unused DMA channel to 0x3F */
+#define MAX_BLOCK_SIZE         0x1000 /* 1024 blocks * 4 bytes data width */
 
 /* DMAC_CFG */
 #define DMAC_EN_POS                    0