dmaengine: dw-axi-dmac: Add StarFive JH7100 support

Signed-off-by: Samin Guo <samin.guo@starfivetech.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

Author: Samin Guo

drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c

@@ -722,8 +722,13 @@ static int dw_axi_dma_set_hw_desc(struct axi_dma_chan *chan,
 
 	hw_desc->lli->block_ts_lo = cpu_to_le32(block_ts - 1);
 
+#ifdef CONFIG_SOC_STARFIVE
+	ctllo |= DWAXIDMAC_BURST_TRANS_LEN_16 << CH_CTL_L_DST_MSIZE_POS |
+		 DWAXIDMAC_BURST_TRANS_LEN_16 << CH_CTL_L_SRC_MSIZE_POS;
+#else
 	ctllo |= DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_DST_MSIZE_POS |
 		 DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_SRC_MSIZE_POS;
+#endif
 	hw_desc->lli->ctl_lo = cpu_to_le32(ctllo);
 
 	set_desc_src_master(hw_desc);
@@ -1578,7 +1583,11 @@ static int dw_probe(struct platform_device *pdev)
 	 * Therefore, set constraint to 1024 * 4.
 	 */
 	dw->dma.dev->dma_parms = &dw->dma_parms;
+#ifdef CONFIG_SOC_STARFIVE
+	dma_set_max_seg_size(&pdev->dev, DMAC_MAX_BLK_SIZE);
+#else
 	dma_set_max_seg_size(&pdev->dev, MAX_BLOCK_SIZE);
+#endif
 	platform_set_drvdata(pdev, chip);
 
 	pm_runtime_enable(chip->dev);
@@ -1660,6 +1669,9 @@ static const struct of_device_id dw_dma_of_id_table[] = {
 	}, {
 		.compatible = "intel,kmb-axi-dma",
 		.data = (void *)AXI_DMA_FLAG_HAS_APB_REGS,
+	}, {
+		.compatible = "starfive,jh7100-axi-dma",
+		.data = (void *)(AXI_DMA_FLAG_HAS_RESETS | AXI_DMA_FLAG_USE_CFG2),
 	}, {
 		.compatible = "starfive,jh7110-axi-dma",
 		.data = (void *)(AXI_DMA_FLAG_HAS_RESETS | AXI_DMA_FLAG_USE_CFG2),

drivers/dma/dw-axi-dmac/dw-axi-dmac.h

@@ -287,7 +287,11 @@ enum {
 #define CH_CTL_L_SRC_MAST		BIT(0)
 
 /* CH_CFG_H */
+#ifdef CONFIG_SOC_STARFIVE
+#define CH_CFG_H_PRIORITY_POS		15
+#else
 #define CH_CFG_H_PRIORITY_POS		17
+#endif
 #define CH_CFG_H_DST_PER_POS		12
 #define CH_CFG_H_SRC_PER_POS		7
 #define CH_CFG_H_HS_SEL_DST_POS		4