dmaengine: sirf: add CSRatlas7 SoC support

add support for new CSR atlas7 SoC. atlas7 exists V1 and V2 IP.
atlas7 DMAv1 is basically moved from marco, which has never been
delivered to customers and renamed in this patch.
atlas7 DMAv2 supports chain DMA by a chain table, this
patch also adds chain DMA support for atlas7.

atlas7 DMAv1 and DMAv2 co-exist in the same chip. there are some HW
configuration differences(register offset etc.) with old prima2 chips,
so we use compatible string to differentiate old prima2 and new atlas7,
then results in different set in HW for them.

Signed-off-by: Hao Liu <[e-mail]>
Signed-off-by: Yanchang Li <[e-mail]>
Signed-off-by: Barry Song <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>

Documentation/devicetree/bindings/dma/sirfsoc-dma.txt

···
 See dma.txt first
 
 Required properties:
-- compatible: Should be "sirf,prima2-dmac" or "sirf,marco-dmac"
+- compatible: Should be "sirf,prima2-dmac", "sirf,atlas7-dmac" or
+  "sirf,atlas7-dmac-v2"
 - reg: Should contain DMA registers location and length.
 - interrupts: Should contain one interrupt shared by all channel
 - #dma-cells: must be <1>. used to represent the number of integer

drivers/dma/sirf-dma.c

···
 
 #include "dmaengine.h"
 
+#define SIRFSOC_DMA_VER_A7V1                    1
+#define SIRFSOC_DMA_VER_A7V2                    2
+#define SIRFSOC_DMA_VER_A6                      4
+
 #define SIRFSOC_DMA_DESCRIPTORS                 16
 #define SIRFSOC_DMA_CHANNELS                    16
+#define SIRFSOC_DMA_TABLE_NUM                   256
 
 #define SIRFSOC_DMA_CH_ADDR                     0x00
 #define SIRFSOC_DMA_CH_XLEN                     0x04
···
 #define SIRFSOC_DMA_CH_VALID                    0x140
 #define SIRFSOC_DMA_CH_INT                      0x144
 #define SIRFSOC_DMA_INT_EN                      0x148
-#define SIRFSOC_DMA_INT_EN_CLR			0x14C
+#define SIRFSOC_DMA_INT_EN_CLR                  0x14C
 #define SIRFSOC_DMA_CH_LOOP_CTRL                0x150
-#define SIRFSOC_DMA_CH_LOOP_CTRL_CLR            0x15C
+#define SIRFSOC_DMA_CH_LOOP_CTRL_CLR            0x154
+#define SIRFSOC_DMA_WIDTH_ATLAS7                0x10
+#define SIRFSOC_DMA_VALID_ATLAS7                0x14
+#define SIRFSOC_DMA_INT_ATLAS7                  0x18
+#define SIRFSOC_DMA_INT_EN_ATLAS7               0x1c
+#define SIRFSOC_DMA_LOOP_CTRL_ATLAS7            0x20
+#define SIRFSOC_DMA_CUR_DATA_ADDR               0x34
+#define SIRFSOC_DMA_MUL_ATLAS7                  0x38
+#define SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7         0x158
+#define SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7     0x15C
+#define SIRFSOC_DMA_IOBG_SCMD_EN		0x800
+#define SIRFSOC_DMA_EARLY_RESP_SET		0x818
+#define SIRFSOC_DMA_EARLY_RESP_CLR		0x81C
 
 #define SIRFSOC_DMA_MODE_CTRL_BIT               4
 #define SIRFSOC_DMA_DIR_CTRL_BIT                5
+#define SIRFSOC_DMA_MODE_CTRL_BIT_ATLAS7        2
+#define SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7       3
+#define SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7         4
+#define SIRFSOC_DMA_TAB_NUM_ATLAS7              7
+#define SIRFSOC_DMA_CHAIN_INT_BIT_ATLAS7        5
+#define SIRFSOC_DMA_CHAIN_FLAG_SHIFT_ATLAS7     25
+#define SIRFSOC_DMA_CHAIN_ADDR_SHIFT            32
+
+#define SIRFSOC_DMA_INT_FINI_INT_ATLAS7         BIT(0)
+#define SIRFSOC_DMA_INT_CNT_INT_ATLAS7          BIT(1)
+#define SIRFSOC_DMA_INT_PAU_INT_ATLAS7          BIT(2)
+#define SIRFSOC_DMA_INT_LOOP_INT_ATLAS7         BIT(3)
+#define SIRFSOC_DMA_INT_INV_INT_ATLAS7          BIT(4)
+#define SIRFSOC_DMA_INT_END_INT_ATLAS7          BIT(5)
+#define SIRFSOC_DMA_INT_ALL_ATLAS7              0x3F
 
 /* xlen and dma_width register is in 4 bytes boundary */
 #define SIRFSOC_DMA_WORD_LEN			4
+#define SIRFSOC_DMA_XLEN_MAX_V1         0x800
+#define SIRFSOC_DMA_XLEN_MAX_V2         0x1000
 
 struct sirfsoc_dma_desc {
 	struct dma_async_tx_descriptor	desc;
···
 	int             width;          /* DMA width */
 	int             dir;
 	bool            cyclic;         /* is loop DMA? */
+	bool            chain;          /* is chain DMA? */
 	u32             addr;		/* DMA buffer address */
+	u64 chain_table[SIRFSOC_DMA_TABLE_NUM]; /* chain tbl */
 };
 
 struct sirfsoc_dma_chan {
···
 	void __iomem			*base;
 	int				irq;
 	struct clk			*clk;
-	bool				is_marco;
+	int				type;
+	void (*exec_desc)(struct sirfsoc_dma_desc *sdesc,
+		int cid, int burst_mode, void __iomem *base);
 	struct sirfsoc_dma_regs		regs_save;
+};
+
+struct sirfsoc_dmadata {
+	void (*exec)(struct sirfsoc_dma_desc *sdesc,
+		int cid, int burst_mode, void __iomem *base);
+	int type;
+};
+
+enum sirfsoc_dma_chain_flag {
+	SIRFSOC_DMA_CHAIN_NORMAL = 0x01,
+	SIRFSOC_DMA_CHAIN_PAUSE = 0x02,
+	SIRFSOC_DMA_CHAIN_LOOP = 0x03,
+	SIRFSOC_DMA_CHAIN_END = 0x04
 };
 
 #define DRV_NAME	"sirfsoc_dma"
···
 	return container_of(schan, struct sirfsoc_dma, channels[c->chan_id]);
 }
 
+static void sirfsoc_dma_execute_hw_a7v2(struct sirfsoc_dma_desc *sdesc,
+		int cid, int burst_mode, void __iomem *base)
+{
+	if (sdesc->chain) {
+		/* DMA v2 HW chain mode */
+		writel_relaxed((sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7) |
+			       (sdesc->chain <<
+				SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7) |
+			       (0x8 << SIRFSOC_DMA_TAB_NUM_ATLAS7) | 0x3,
+			       base + SIRFSOC_DMA_CH_CTRL);
+	} else {
+		/* DMA v2 legacy mode */
+		writel_relaxed(sdesc->xlen, base + SIRFSOC_DMA_CH_XLEN);
+		writel_relaxed(sdesc->ylen, base + SIRFSOC_DMA_CH_YLEN);
+		writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_ATLAS7);
+		writel_relaxed((sdesc->width*((sdesc->ylen+1)>>1)),
+				base + SIRFSOC_DMA_MUL_ATLAS7);
+		writel_relaxed((sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7) |
+			       (sdesc->chain <<
+				SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7) |
+			       0x3, base + SIRFSOC_DMA_CH_CTRL);
+	}
+	writel_relaxed(sdesc->chain ? SIRFSOC_DMA_INT_END_INT_ATLAS7 :
+		       (SIRFSOC_DMA_INT_FINI_INT_ATLAS7 |
+			SIRFSOC_DMA_INT_LOOP_INT_ATLAS7),
+		       base + SIRFSOC_DMA_INT_EN_ATLAS7);
+	writel(sdesc->addr, base + SIRFSOC_DMA_CH_ADDR);
+	if (sdesc->cyclic)
+		writel(0x10001, base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
+}
+
+static void sirfsoc_dma_execute_hw_a7v1(struct sirfsoc_dma_desc *sdesc,
+		int cid, int burst_mode, void __iomem *base)
+{
+	writel_relaxed(1, base + SIRFSOC_DMA_IOBG_SCMD_EN);
+	writel_relaxed((1 << cid), base + SIRFSOC_DMA_EARLY_RESP_SET);
+	writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_0 + cid * 4);
+	writel_relaxed(cid | (burst_mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
+		       (sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
+		       base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
+	writel_relaxed(sdesc->xlen, base + cid * 0x10 + SIRFSOC_DMA_CH_XLEN);
+	writel_relaxed(sdesc->ylen, base + cid * 0x10 + SIRFSOC_DMA_CH_YLEN);
+	writel_relaxed(readl_relaxed(base + SIRFSOC_DMA_INT_EN) |
+		       (1 << cid), base + SIRFSOC_DMA_INT_EN);
+	writel(sdesc->addr >> 2, base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
+	if (sdesc->cyclic) {
+		writel((1 << cid) | 1 << (cid + 16) |
+		       readl_relaxed(base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7),
+		       base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7);
+	}
+
+}
+
+static void sirfsoc_dma_execute_hw_a6(struct sirfsoc_dma_desc *sdesc,
+		int cid, int burst_mode, void __iomem *base)
+{
+	writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_0 + cid * 4);
+	writel_relaxed(cid | (burst_mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
+		       (sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
+		       base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
+	writel_relaxed(sdesc->xlen, base + cid * 0x10 + SIRFSOC_DMA_CH_XLEN);
+	writel_relaxed(sdesc->ylen, base + cid * 0x10 + SIRFSOC_DMA_CH_YLEN);
+	writel_relaxed(readl_relaxed(base + SIRFSOC_DMA_INT_EN) |
+		       (1 << cid), base + SIRFSOC_DMA_INT_EN);
+	writel(sdesc->addr >> 2, base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
+	if (sdesc->cyclic) {
+		writel((1 << cid) | 1 << (cid + 16) |
+		       readl_relaxed(base + SIRFSOC_DMA_CH_LOOP_CTRL),
+		       base + SIRFSOC_DMA_CH_LOOP_CTRL);
+	}
+
+}
+
 /* Execute all queued DMA descriptors */
 static void sirfsoc_dma_execute(struct sirfsoc_dma_chan *schan)
 {
 	struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
 	int cid = schan->chan.chan_id;
 	struct sirfsoc_dma_desc *sdesc = NULL;
+	void __iomem *base;
 
 	/*
 	 * lock has been held by functions calling this, so we don't hold
 	 * lock again
 	 */
-
+	base = sdma->base;
 	sdesc = list_first_entry(&schan->queued, struct sirfsoc_dma_desc,
-		node);
+				 node);
 	/* Move the first queued descriptor to active list */
 	list_move_tail(&sdesc->node, &schan->active);
 
+	if (sdma->type == SIRFSOC_DMA_VER_A7V2)
+		cid = 0;
+
 	/* Start the DMA transfer */
-	writel_relaxed(sdesc->width, sdma->base + SIRFSOC_DMA_WIDTH_0 +
-		cid * 4);
-	writel_relaxed(cid | (schan->mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
-		(sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
-		sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
-	writel_relaxed(sdesc->xlen, sdma->base + cid * 0x10 +
-		SIRFSOC_DMA_CH_XLEN);
-	writel_relaxed(sdesc->ylen, sdma->base + cid * 0x10 +
-		SIRFSOC_DMA_CH_YLEN);
-	writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) |
-		(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
+	sdma->exec_desc(sdesc, cid, schan->mode, base);
 
-	/*
-	 * writel has an implict memory write barrier to make sure data is
-	 * flushed into memory before starting DMA
-	 */
-	writel(sdesc->addr >> 2, sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
-
-	if (sdesc->cyclic) {
-		writel((1 << cid) | 1 << (cid + 16) |
-			readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
+	if (sdesc->cyclic)
 		schan->happened_cyclic = schan->completed_cyclic = 0;
-	}
 }
 
 /* Interrupt handler */
···
 	struct sirfsoc_dma_chan *schan;
 	struct sirfsoc_dma_desc *sdesc = NULL;
 	u32 is;
+	bool chain;
 	int ch;
+	void __iomem *reg;
 
-	is = readl(sdma->base + SIRFSOC_DMA_CH_INT);
-	while ((ch = fls(is) - 1) >= 0) {
-		is &= ~(1 << ch);
-		writel_relaxed(1 << ch, sdma->base + SIRFSOC_DMA_CH_INT);
-		schan = &sdma->channels[ch];
+	switch (sdma->type) {
+	case SIRFSOC_DMA_VER_A6:
+	case SIRFSOC_DMA_VER_A7V1:
+		is = readl(sdma->base + SIRFSOC_DMA_CH_INT);
+		reg = sdma->base + SIRFSOC_DMA_CH_INT;
+		while ((ch = fls(is) - 1) >= 0) {
+			is &= ~(1 << ch);
+			writel_relaxed(1 << ch, reg);
+			schan = &sdma->channels[ch];
+			spin_lock(&schan->lock);
+			sdesc = list_first_entry(&schan->active,
+						 struct sirfsoc_dma_desc, node);
+			if (!sdesc->cyclic) {
+				/* Execute queued descriptors */
+				list_splice_tail_init(&schan->active,
+						      &schan->completed);
+				dma_cookie_complete(&sdesc->desc);
+				if (!list_empty(&schan->queued))
+					sirfsoc_dma_execute(schan);
+			} else
+				schan->happened_cyclic++;
+			spin_unlock(&schan->lock);
+		}
+		break;
 
+	case SIRFSOC_DMA_VER_A7V2:
+		is = readl(sdma->base + SIRFSOC_DMA_INT_ATLAS7);
+
+		reg = sdma->base + SIRFSOC_DMA_INT_ATLAS7;
+		writel_relaxed(SIRFSOC_DMA_INT_ALL_ATLAS7, reg);
+		schan = &sdma->channels[0];
 		spin_lock(&schan->lock);
-
-		sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc,
-			node);
+		sdesc = list_first_entry(&schan->active,
+					 struct sirfsoc_dma_desc, node);
 		if (!sdesc->cyclic) {
-			/* Execute queued descriptors */
-			list_splice_tail_init(&schan->active, &schan->completed);
-			if (!list_empty(&schan->queued))
-				sirfsoc_dma_execute(schan);
-		} else
+			chain = sdesc->chain;
+			if ((chain && (is & SIRFSOC_DMA_INT_END_INT_ATLAS7)) ||
+				(!chain &&
+				(is & SIRFSOC_DMA_INT_FINI_INT_ATLAS7))) {
+				/* Execute queued descriptors */
+				list_splice_tail_init(&schan->active,
+						      &schan->completed);
+				dma_cookie_complete(&sdesc->desc);
+				if (!list_empty(&schan->queued))
+					sirfsoc_dma_execute(schan);
+			}
+		} else if (sdesc->cyclic && (is &
+					SIRFSOC_DMA_INT_LOOP_INT_ATLAS7))
 			schan->happened_cyclic++;
 
 		spin_unlock(&schan->lock);
+		break;
+
+	default:
+		break;
 	}
 
 	/* Schedule tasklet */
···
 			schan->chan.completed_cookie = last_cookie;
 			spin_unlock_irqrestore(&schan->lock, flags);
 		} else {
-			/* for cyclic channel, desc is always in active list */
-			sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc,
-				node);
-
-			if (!sdesc || (sdesc && !sdesc->cyclic)) {
-				/* without active cyclic DMA */
+			if (list_empty(&schan->active)) {
 				spin_unlock_irqrestore(&schan->lock, flags);
 				continue;
 			}
+
+			/* for cyclic channel, desc is always in active list */
+			sdesc = list_first_entry(&schan->active,
+				struct sirfsoc_dma_desc, node);
 
 			/* cyclic DMA */
 			happened_cyclic = schan->happened_cyclic;
···
 
 	spin_lock_irqsave(&schan->lock, flags);
 
-	if (!sdma->is_marco) {
-		writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) &
-			~(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
-		writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL)
-			& ~((1 << cid) | 1 << (cid + 16)),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
-	} else {
+	switch (sdma->type) {
+	case SIRFSOC_DMA_VER_A7V1:
 		writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_INT_EN_CLR);
 		writel_relaxed((1 << cid) | 1 << (cid + 16),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL_CLR);
+			       sdma->base +
+			       SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7);
+		writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
+		break;
+	case SIRFSOC_DMA_VER_A7V2:
+		writel_relaxed(0, sdma->base + SIRFSOC_DMA_INT_EN_ATLAS7);
+		writel_relaxed(0, sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
+		writel_relaxed(0, sdma->base + SIRFSOC_DMA_VALID_ATLAS7);
+		break;
+	case SIRFSOC_DMA_VER_A6:
+		writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) &
+			       ~(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
+		writel_relaxed(readl_relaxed(sdma->base +
+					     SIRFSOC_DMA_CH_LOOP_CTRL) &
+			       ~((1 << cid) | 1 << (cid + 16)),
+			       sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
+		writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
+		break;
+	default:
+		break;
 	}
-
-	writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
 
 	list_splice_tail_init(&schan->active, &schan->free);
 	list_splice_tail_init(&schan->queued, &schan->free);
···
 
 	spin_lock_irqsave(&schan->lock, flags);
 
-	if (!sdma->is_marco)
-		writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL)
-			& ~((1 << cid) | 1 << (cid + 16)),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
-	else
+	switch (sdma->type) {
+	case SIRFSOC_DMA_VER_A7V1:
 		writel_relaxed((1 << cid) | 1 << (cid + 16),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL_CLR);
+			       sdma->base +
+			       SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7);
+		break;
+	case SIRFSOC_DMA_VER_A7V2:
+		writel_relaxed(0, sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
+		break;
+	case SIRFSOC_DMA_VER_A6:
+		writel_relaxed(readl_relaxed(sdma->base +
+					     SIRFSOC_DMA_CH_LOOP_CTRL) &
+			       ~((1 << cid) | 1 << (cid + 16)),
+			       sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
+		break;
+
+	default:
+		break;
+	}
 
 	spin_unlock_irqrestore(&schan->lock, flags);
 
···
 	unsigned long flags;
 
 	spin_lock_irqsave(&schan->lock, flags);
-
-	if (!sdma->is_marco)
-		writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL)
-			| ((1 << cid) | 1 << (cid + 16)),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
-	else
+	switch (sdma->type) {
+	case SIRFSOC_DMA_VER_A7V1:
 		writel_relaxed((1 << cid) | 1 << (cid + 16),
-			sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
+			       sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7);
+		break;
+	case SIRFSOC_DMA_VER_A7V2:
+		writel_relaxed(0x10001,
+			       sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
+		break;
+	case SIRFSOC_DMA_VER_A6:
+		writel_relaxed(readl_relaxed(sdma->base +
+					     SIRFSOC_DMA_CH_LOOP_CTRL) |
+			       ((1 << cid) | 1 << (cid + 16)),
+			       sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
+		break;
+
+	default:
+		break;
+	}
 
 	spin_unlock_irqrestore(&schan->lock, flags);
 
···
 
 	spin_lock_irqsave(&schan->lock, flags);
 
-	sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc,
-			node);
-	dma_request_bytes = (sdesc->xlen + 1) * (sdesc->ylen + 1) *
-		(sdesc->width * SIRFSOC_DMA_WORD_LEN);
+	if (list_empty(&schan->active)) {
+		ret = dma_cookie_status(chan, cookie, txstate);
+		dma_set_residue(txstate, 0);
+		spin_unlock_irqrestore(&schan->lock, flags);
+		return ret;
+	}
+	sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc, node);
+	if (sdesc->cyclic)
+		dma_request_bytes = (sdesc->xlen + 1) * (sdesc->ylen + 1) *
+			(sdesc->width * SIRFSOC_DMA_WORD_LEN);
+	else
+		dma_request_bytes = sdesc->xlen * SIRFSOC_DMA_WORD_LEN;
 
 	ret = dma_cookie_status(chan, cookie, txstate);
-	dma_pos = readl_relaxed(sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR)
-		<< 2;
+
+	if (sdma->type == SIRFSOC_DMA_VER_A7V2)
+		cid = 0;
+
+	if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
+		dma_pos = readl_relaxed(sdma->base + SIRFSOC_DMA_CUR_DATA_ADDR);
+	} else {
+		dma_pos = readl_relaxed(
+			sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR) << 2;
+	}
+
 	residue = dma_request_bytes - (dma_pos - sdesc->addr);
 	dma_set_residue(txstate, residue);
 
···
 	struct dma_device *dma;
 	struct sirfsoc_dma *sdma;
 	struct sirfsoc_dma_chan *schan;
+	struct sirfsoc_dmadata *data;
 	struct resource res;
 	ulong regs_start, regs_size;
 	u32 id;
···
 		dev_err(dev, "Memory exhausted!\n");
 		return -ENOMEM;
 	}
-
-	if (of_device_is_compatible(dn, "sirf,marco-dmac"))
-		sdma->is_marco = true;
+	data = (struct sirfsoc_dmadata *)
+		(of_match_device(op->dev.driver->of_match_table,
+				 &op->dev)->data);
+	sdma->exec_desc = data->exec;
+	sdma->type = data->type;
 
 	if (of_property_read_u32(dn, "cell-index", &id)) {
 		dev_err(dev, "Fail to get DMAC index\n");
···
 	struct sirfsoc_dma_chan *schan;
 	int ch;
 	int ret;
+	int count;
+	u32 int_offset;
 
 	/*
 	 * if we were runtime-suspended before, resume to enable clock
···
 			return ret;
 	}
 
+	if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
+		count = 1;
+		int_offset = SIRFSOC_DMA_INT_EN_ATLAS7;
+	} else {
+		count = SIRFSOC_DMA_CHANNELS;
+		int_offset = SIRFSOC_DMA_INT_EN;
+	}
+
 	/*
 	 * DMA controller will lose all registers while suspending
 	 * so we need to save registers for active channels
 	 */
-	for (ch = 0; ch < SIRFSOC_DMA_CHANNELS; ch++) {
+	for (ch = 0; ch < count; ch++) {
 		schan = &sdma->channels[ch];
 		if (list_empty(&schan->active))
 			continue;
···
 		save->ctrl[ch] = readl_relaxed(sdma->base +
 			ch * 0x10 + SIRFSOC_DMA_CH_CTRL);
 	}
-	save->interrupt_en = readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN);
+	save->interrupt_en = readl_relaxed(sdma->base + int_offset);
 
 	/* Disable clock */
 	sirfsoc_dma_runtime_suspend(dev);
···
 	struct sirfsoc_dma_chan *schan;
 	int ch;
 	int ret;
+	int count;
+	u32 int_offset;
+	u32 width_offset;
 
 	/* Enable clock before accessing register */
 	ret = sirfsoc_dma_runtime_resume(dev);
 	if (ret < 0)
 		return ret;
 
-	writel_relaxed(save->interrupt_en, sdma->base + SIRFSOC_DMA_INT_EN);
-	for (ch = 0; ch < SIRFSOC_DMA_CHANNELS; ch++) {
+	if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
+		count = 1;
+		int_offset = SIRFSOC_DMA_INT_EN_ATLAS7;
+		width_offset = SIRFSOC_DMA_WIDTH_ATLAS7;
+	} else {
+		count = SIRFSOC_DMA_CHANNELS;
+		int_offset = SIRFSOC_DMA_INT_EN;
+		width_offset = SIRFSOC_DMA_WIDTH_0;
+	}
+
+	writel_relaxed(save->interrupt_en, sdma->base + int_offset);
+	for (ch = 0; ch < count; ch++) {
 		schan = &sdma->channels[ch];
 		if (list_empty(&schan->active))
 			continue;
···
 			struct sirfsoc_dma_desc,
 			node);
 		writel_relaxed(sdesc->width,
-			sdma->base + SIRFSOC_DMA_WIDTH_0 + ch * 4);
+			sdma->base + width_offset + ch * 4);
 		writel_relaxed(sdesc->xlen,
 			sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_XLEN);
 		writel_relaxed(sdesc->ylen,
 			sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_YLEN);
 		writel_relaxed(save->ctrl[ch],
 			sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_CTRL);
-		writel_relaxed(sdesc->addr >> 2,
-			sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_ADDR);
+		if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
+			writel_relaxed(sdesc->addr,
+				sdma->base + SIRFSOC_DMA_CH_ADDR);
+		} else {
+			writel_relaxed(sdesc->addr >> 2,
+				sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_ADDR);
+
+		}
 	}
 
 	/* if we were runtime-suspended before, suspend again */
···
 	SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_dma_pm_suspend, sirfsoc_dma_pm_resume)
 };
 
+struct sirfsoc_dmadata sirfsoc_dmadata_a6 = {
+	.exec = sirfsoc_dma_execute_hw_a6,
+	.type = SIRFSOC_DMA_VER_A6,
+};
+
+struct sirfsoc_dmadata sirfsoc_dmadata_a7v1 = {
+	.exec = sirfsoc_dma_execute_hw_a7v1,
+	.type = SIRFSOC_DMA_VER_A7V1,
+};
+
+struct sirfsoc_dmadata sirfsoc_dmadata_a7v2 = {
+	.exec = sirfsoc_dma_execute_hw_a7v2,
+	.type = SIRFSOC_DMA_VER_A7V2,
+};
+
 static const struct of_device_id sirfsoc_dma_match[] = {
-	{ .compatible = "sirf,prima2-dmac", },
-	{ .compatible = "sirf,marco-dmac", },
+	{ .compatible = "sirf,prima2-dmac", .data = &sirfsoc_dmadata_a6,},
+	{ .compatible = "sirf,atlas7-dmac", .data = &sirfsoc_dmadata_a7v1,},
+	{ .compatible = "sirf,atlas7-dmac-v2", .data = &sirfsoc_dmadata_a7v2,},
 	{},
 };
 
···
 subsys_initcall(sirfsoc_dma_init);
 module_exit(sirfsoc_dma_exit);
 
-MODULE_AUTHOR("Rongjun Ying <[e-mail]>, "
-	"Barry Song <[e-mail]>");
+MODULE_AUTHOR("Rongjun Ying <[e-mail]>");
+MODULE_AUTHOR("Barry Song <[e-mail]>");
 MODULE_DESCRIPTION("SIRFSOC DMA control driver");
 MODULE_LICENSE("GPL v2");