[brcm63xx] add preliminary support for 3.6 kernel

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33936 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 758 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.6/443-MIPS-BCM63XX-enable-enet-for-BCM6345.patch b/target/linux/brcm63xx/patches-3.6/443-MIPS-BCM63XX-enable-enet-for-BCM6345.patch
new file mode 100644
index 000000000..98ec07179
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.6/443-MIPS-BCM63XX-enable-enet-for-BCM6345.patch
@@ -0,0 +1,758 @@
+[PATCH] MIPS: BCM63XX: enable ethernet for BCM6345
+
+BCM6345 has a slightly older DMA engine which is not supported by default by
+the bcm63xx_enet driver. This patch adds the missing Ethernet DMA definitions
+as well as patches all the places in the ethernet driver were the DMA
+reading/writing is different.
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+---
+--- a/arch/mips/bcm63xx/dev-enet.c
++++ b/arch/mips/bcm63xx/dev-enet.c
+@@ -9,10 +9,44 @@
+ #include <linux/init.h>
+ #include <linux/kernel.h>
+ #include <linux/platform_device.h>
++#include <linux/export.h>
+ #include <bcm63xx_dev_enet.h>
+ #include <bcm63xx_io.h>
+ #include <bcm63xx_regs.h>
+ 
++#ifdef BCMCPU_RUNTIME_DETECT
++static const unsigned long bcm6xxx_regs_enetdmac[] = {
++	[ENETDMAC_CHANCFG]	= ENETDMAC_CHANCFG_REG,
++	[ENETDMAC_IR]		= ENETDMAC_IR_REG,
++	[ENETDMAC_IRMASK]	= ENETDMAC_IRMASK_REG,
++	[ENETDMAC_MAXBURST]	= ENETDMAC_MAXBURST_REG,
++};
++
++static const unsigned long bcm6345_regs_enetdmac[] = {
++	[ENETDMAC_CHANCFG]	= ENETDMA_6345_CHANCFG_REG,
++	[ENETDMAC_IR]		= ENETDMA_6345_IR_REG,
++	[ENETDMAC_IRMASK]	= ENETDMA_6345_IRMASK_REG,
++	[ENETDMAC_MAXBURST]	= ENETDMA_6345_MAXBURST_REG,
++	[ENETDMAC_BUFALLOC]	= ENETDMA_6345_BUFALLOC_REG,
++	[ENETDMAC_RSTART]	= ENETDMA_6345_RSTART_REG,
++	[ENETDMAC_FC]		= ENETDMA_6345_FC_REG,
++	[ENETDMAC_LEN]		= ENETDMA_6345_LEN_REG,
++};
++
++const unsigned long *bcm63xx_regs_enetdmac;
++EXPORT_SYMBOL(bcm63xx_regs_enetdmac);
++
++static __init void bcm63xx_enetdmac_regs_init(void)
++{
++	if (BCMCPU_IS_6345())
++		bcm63xx_regs_enetdmac = bcm6345_regs_enetdmac;
++	else
++		bcm63xx_regs_enetdmac = bcm6xxx_regs_enetdmac;
++}
++#else
++static __init void bcm63xx_enetdmac_regs_init(void) { }
++#endif
++
+ static struct resource shared_res[] = {
+ 	{
+ 		.start		= -1, /* filled at runtime */
+@@ -137,12 +171,19 @@ static int __init register_shared(void)
+ 	if (shared_device_registered)
+ 		return 0;
+ 
++	bcm63xx_enetdmac_regs_init();
++
+ 	shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
+ 	shared_res[0].end = shared_res[0].start;
+-	shared_res[0].end += (RSET_ENETDMA_SIZE)  - 1;
++	if (BCMCPU_IS_6345())
++		shared_res[0].end += (RSET_6345_ENETDMA_SIZE) - 1;
++	else
++		shared_res[0].end += (RSET_ENETDMA_SIZE)  - 1;
+ 
+ 	if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
+ 		chan_count = 32;
++	else if (BCMCPU_IS_6345())
++		chan_count = 8;
+ 	else
+ 		chan_count = 16;
+ 
+@@ -172,7 +213,7 @@ int __init bcm63xx_enet_register(int uni
+ 	if (unit > 1)
+ 		return -ENODEV;
+ 
+-	if (unit == 1 && BCMCPU_IS_6338())
++	if (unit == 1 && (BCMCPU_IS_6338() || BCMCPU_IS_6345()))
+ 		return -ENODEV;
+ 
+ 	ret = register_shared();
+@@ -213,6 +254,20 @@ int __init bcm63xx_enet_register(int uni
+ 		dpd->phy_interrupt = bcm63xx_get_irq_number(IRQ_ENET_PHY);
+ 	}
+ 
++	dpd->dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
++	dpd->dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
++	if (BCMCPU_IS_6345()) {
++		dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_CHAINING_MASK;
++		dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_WRAP_EN_MASK;
++		dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_FLOWC_EN_MASK;
++		dpd->dma_chan_int_mask |= ENETDMA_IR_BUFDONE_MASK;
++		dpd->dma_chan_int_mask |= ENETDMA_IR_NOTOWNER_MASK;
++		dpd->dma_chan_width = ENETDMA_6345_CHAN_WIDTH;
++		dpd->dma_no_sram = 1;
++		dpd->dma_desc_shift = ENETDMA_6345_DESC_SHIFT;
++	} else
++		dpd->dma_chan_width = ENETDMA_CHAN_WIDTH;
++
+ 	ret = platform_device_register(pdev);
+ 	if (ret)
+ 		return ret;
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+@@ -709,6 +709,8 @@
+ /*************************************************************************
+  * _REG relative to RSET_ENETDMA
+  *************************************************************************/
++#define ENETDMA_CHAN_WIDTH		0x10
++#define ENETDMA_6345_CHAN_WIDTH		0x40
+ 
+ /* Controller Configuration Register */
+ #define ENETDMA_CFG_REG			(0x0)
+@@ -758,29 +760,54 @@
+ /* State Ram Word 4 */
+ #define ENETDMA_SRAM4_REG(x)		(0x20c + (x) * 0x10)
+ 
++/* Broadcom 6345 ENET DMA definitions */
++#define ENETDMA_6345_CHANCFG_REG	(0x00)
++
++#define ENETDMA_6345_MAXBURST_REG	(0x04)
++
++#define ENETDMA_6345_RSTART_REG		(0x08)
++
++#define ENETDMA_6345_LEN_REG		(0x0C)
++
++#define ENETDMA_6345_IR_REG		(0x14)
++
++#define ENETDMA_6345_IRMASK_REG		(0x18)
++
++#define ENETDMA_6345_FC_REG		(0x1C)
++
++#define ENETDMA_6345_BUFALLOC_REG	(0x20)
++
++/* Shift down for EOP, SOP and WRAP bits */
++#define ENETDMA_6345_DESC_SHIFT		(3)
+ 
+ /*************************************************************************
+  * _REG relative to RSET_ENETDMAC
+  *************************************************************************/
+ 
+ /* Channel Configuration register */
+-#define ENETDMAC_CHANCFG_REG(x)		((x) * 0x10)
++#define ENETDMAC_CHANCFG_REG		(0x0)
+ #define ENETDMAC_CHANCFG_EN_SHIFT	0
+ #define ENETDMAC_CHANCFG_EN_MASK	(1 << ENETDMA_CHANCFG_EN_SHIFT)
+ #define ENETDMAC_CHANCFG_PKTHALT_SHIFT	1
+ #define ENETDMAC_CHANCFG_PKTHALT_MASK	(1 << ENETDMA_CHANCFG_PKTHALT_SHIFT)
++#define ENETDMAC_CHANCFG_CHAINING_SHIFT	2
++#define ENETDMAC_CHANCFG_CHAINING_MASK	(1 << ENETDMAC_CHANCFG_CHAINING_SHIFT)
++#define ENETDMAC_CHANCFG_WRAP_EN_SHIFT	3
++#define ENETDMAC_CHANCFG_WRAP_EN_MASK	(1 << ENETDMAC_CHANCFG_WRAP_EN_SHIFT)
++#define ENETDMAC_CHANCFG_FLOWC_EN_SHIFT	4
++#define ENETDMAC_CHANCFG_FLOWC_EN_MASK	(1 << ENETDMAC_CHANCFG_FLOWC_EN_SHIFT)
+ 
+ /* Interrupt Control/Status register */
+-#define ENETDMAC_IR_REG(x)		(0x4 + (x) * 0x10)
++#define ENETDMAC_IR_REG			(0x4)
+ #define ENETDMAC_IR_BUFDONE_MASK	(1 << 0)
+ #define ENETDMAC_IR_PKTDONE_MASK	(1 << 1)
+ #define ENETDMAC_IR_NOTOWNER_MASK	(1 << 2)
+ 
+ /* Interrupt Mask register */
+-#define ENETDMAC_IRMASK_REG(x)		(0x8 + (x) * 0x10)
++#define ENETDMAC_IRMASK_REG		(0x8)
+ 
+ /* Maximum Burst Length */
+-#define ENETDMAC_MAXBURST_REG(x)	(0xc + (x) * 0x10)
++#define ENETDMAC_MAXBURST_REG		(0xc)
+ 
+ 
+ /*************************************************************************
+@@ -788,16 +815,16 @@
+  *************************************************************************/
+ 
+ /* Ring Start Address register */
+-#define ENETDMAS_RSTART_REG(x)		((x) * 0x10)
++#define ENETDMAS_RSTART_REG		(0x0)
+ 
+ /* State Ram Word 2 */
+-#define ENETDMAS_SRAM2_REG(x)		(0x4 + (x) * 0x10)
++#define ENETDMAS_SRAM2_REG		(0x4)
+ 
+ /* State Ram Word 3 */
+-#define ENETDMAS_SRAM3_REG(x)		(0x8 + (x) * 0x10)
++#define ENETDMAS_SRAM3_REG		(0x8)
+ 
+ /* State Ram Word 4 */
+-#define ENETDMAS_SRAM4_REG(x)		(0xc + (x) * 0x10)
++#define ENETDMAS_SRAM4_REG		(0xc)
+ 
+ 
+ /*************************************************************************
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+@@ -115,26 +115,28 @@ static inline void enet_dma_writel(struc
+ 	bcm_writel(val, bcm_enet_shared_base[0] + off);
+ }
+ 
+-static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off)
++static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
+ {
+-	return bcm_readl(bcm_enet_shared_base[1] + off);
++	return bcm_readl(bcm_enet_shared_base[1] +
++		(bcm63xx_enetdmacreg(off) + (chan * priv->dma_chan_width)));
+ }
+ 
+ static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
+-				       u32 val, u32 off)
++				       u32 val, u32 off, int chan)
+ {
+-	bcm_writel(val, bcm_enet_shared_base[1] + off);
++	bcm_writel(val, bcm_enet_shared_base[1] +
++		(bcm63xx_enetdmacreg(off) + (chan * priv->dma_chan_width)));
+ }
+ 
+-static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off)
++static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
+ {
+-	return bcm_readl(bcm_enet_shared_base[2] + off);
++	return bcm_readl(bcm_enet_shared_base[2] + (off + (chan * priv->dma_chan_width)));
+ }
+ 
+ static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
+-				       u32 val, u32 off)
++				       u32 val, u32 off, int chan)
+ {
+-	bcm_writel(val, bcm_enet_shared_base[2] + off);
++	bcm_writel(val, bcm_enet_shared_base[2] + (off + (chan * priv->dma_chan_width)));
+ }
+ 
+ /*
+@@ -270,7 +272,7 @@ static int bcm_enet_refill_rx(struct net
+ 		len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
+ 		len_stat |= DMADESC_OWNER_MASK;
+ 		if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
+-			len_stat |= DMADESC_WRAP_MASK;
++			len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
+ 			priv->rx_dirty_desc = 0;
+ 		} else {
+ 			priv->rx_dirty_desc++;
+@@ -281,7 +283,10 @@ static int bcm_enet_refill_rx(struct net
+ 		priv->rx_desc_count++;
+ 
+ 		/* tell dma engine we allocated one buffer */
+-		enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
++		if (!priv->dma_no_sram)
++			enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
++		else
++			enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
+ 	}
+ 
+ 	/* If rx ring is still empty, set a timer to try allocating
+@@ -357,7 +362,8 @@ static int bcm_enet_receive_queue(struct
+ 
+ 		/* if the packet does not have start of packet _and_
+ 		 * end of packet flag set, then just recycle it */
+-		if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
++		if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
++			(DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
+ 			dev->stats.rx_dropped++;
+ 			continue;
+ 		}
+@@ -418,8 +424,8 @@ static int bcm_enet_receive_queue(struct
+ 		bcm_enet_refill_rx(dev);
+ 
+ 		/* kick rx dma */
+-		enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
+-				 ENETDMAC_CHANCFG_REG(priv->rx_chan));
++		enet_dmac_writel(priv, priv->dma_chan_en_mask,
++					 ENETDMAC_CHANCFG, priv->rx_chan);
+ 	}
+ 
+ 	return processed;
+@@ -494,10 +500,10 @@ static int bcm_enet_poll(struct napi_str
+ 	dev = priv->net_dev;
+ 
+ 	/* ack interrupts */
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->tx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IR, priv->rx_chan);
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IR, priv->tx_chan);
+ 
+ 	/* reclaim sent skb */
+ 	tx_work_done = bcm_enet_tx_reclaim(dev, 0);
+@@ -516,10 +522,10 @@ static int bcm_enet_poll(struct napi_str
+ 	napi_complete(napi);
+ 
+ 	/* restore rx/tx interrupt */
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IRMASK, priv->rx_chan);
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IRMASK, priv->tx_chan);
+ 
+ 	return rx_work_done;
+ }
+@@ -562,8 +568,8 @@ static irqreturn_t bcm_enet_isr_dma(int
+ 	priv = netdev_priv(dev);
+ 
+ 	/* mask rx/tx interrupts */
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+ 
+ 	napi_schedule(&priv->napi);
+ 
+@@ -624,14 +630,14 @@ static int bcm_enet_start_xmit(struct sk
+ 				       DMA_TO_DEVICE);
+ 
+ 	len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
+-	len_stat |= DMADESC_ESOP_MASK |
++	len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
+ 		DMADESC_APPEND_CRC |
+ 		DMADESC_OWNER_MASK;
+ 
+ 	priv->tx_curr_desc++;
+ 	if (priv->tx_curr_desc == priv->tx_ring_size) {
+ 		priv->tx_curr_desc = 0;
+-		len_stat |= DMADESC_WRAP_MASK;
++		len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
+ 	}
+ 	priv->tx_desc_count--;
+ 
+@@ -642,8 +648,8 @@ static int bcm_enet_start_xmit(struct sk
+ 	wmb();
+ 
+ 	/* kick tx dma */
+-	enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
+-			 ENETDMAC_CHANCFG_REG(priv->tx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_en_mask,
++				 ENETDMAC_CHANCFG, priv->tx_chan);
+ 
+ 	/* stop queue if no more desc available */
+ 	if (!priv->tx_desc_count)
+@@ -771,6 +777,9 @@ static void bcm_enet_set_flow(struct bcm
+ 		val &= ~ENET_RXCFG_ENFLOW_MASK;
+ 	enet_writel(priv, val, ENET_RXCFG_REG);
+ 
++	if (priv->dma_no_sram)
++		return;
++
+ 	/* tx flow control (pause frame generation) */
+ 	val = enet_dma_readl(priv, ENETDMA_CFG_REG);
+ 	if (tx_en)
+@@ -886,8 +895,8 @@ static int bcm_enet_open(struct net_devi
+ 
+ 	/* mask all interrupts and request them */
+ 	enet_writel(priv, 0, ENET_IRMASK_REG);
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+ 
+ 	ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
+ 	if (ret)
+@@ -966,8 +975,12 @@ static int bcm_enet_open(struct net_devi
+ 	priv->rx_curr_desc = 0;
+ 
+ 	/* initialize flow control buffer allocation */
+-	enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
+-			ENETDMA_BUFALLOC_REG(priv->rx_chan));
++	if (!priv->dma_no_sram)
++		enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
++				ENETDMA_BUFALLOC_REG(priv->rx_chan));
++	else
++		enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
++				ENETDMAC_BUFALLOC, priv->rx_chan);
+ 
+ 	if (bcm_enet_refill_rx(dev)) {
+ 		dev_err(kdev, "cannot allocate rx skb queue\n");
+@@ -976,18 +989,30 @@ static int bcm_enet_open(struct net_devi
+ 	}
+ 
+ 	/* write rx & tx ring addresses */
+-	enet_dmas_writel(priv, priv->rx_desc_dma,
+-			 ENETDMAS_RSTART_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, priv->tx_desc_dma,
+-			 ENETDMAS_RSTART_REG(priv->tx_chan));
++	if (!priv->dma_no_sram) {
++		enet_dmas_writel(priv, priv->rx_desc_dma,
++				 ENETDMAS_RSTART_REG, priv->rx_chan);
++		enet_dmas_writel(priv, priv->tx_desc_dma,
++			 ENETDMAS_RSTART_REG, priv->tx_chan);
++	} else {
++		enet_dmac_writel(priv, priv->rx_desc_dma,
++				ENETDMAC_RSTART, priv->rx_chan);
++		enet_dmac_writel(priv, priv->tx_desc_dma,
++				ENETDMAC_RSTART, priv->tx_chan);
++	}
+ 
+ 	/* clear remaining state ram for rx & tx channel */
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->tx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->tx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
++	if (!priv->dma_no_sram) {
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
++		enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
++	} else {
++		enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
++		enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
++	}
+ 
+ 	/* set max rx/tx length */
+ 	enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
+@@ -995,18 +1020,24 @@ static int bcm_enet_open(struct net_devi
+ 
+ 	/* set dma maximum burst len */
+ 	enet_dmac_writel(priv, priv->dma_maxburst,
+-			 ENETDMAC_MAXBURST_REG(priv->rx_chan));
++			 ENETDMAC_MAXBURST, priv->rx_chan);
+ 	enet_dmac_writel(priv, priv->dma_maxburst,
+-			 ENETDMAC_MAXBURST_REG(priv->tx_chan));
++			 ENETDMAC_MAXBURST, priv->tx_chan);
+ 
+ 	/* set correct transmit fifo watermark */
+ 	enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
+ 
+ 	/* set flow control low/high threshold to 1/3 / 2/3 */
+-	val = priv->rx_ring_size / 3;
+-	enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
+-	val = (priv->rx_ring_size * 2) / 3;
+-	enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
++	if (!priv->dma_no_sram) {
++		val = priv->rx_ring_size / 3;
++		enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
++		val = (priv->rx_ring_size * 2) / 3;
++		enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
++	} else {
++		enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
++		enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
++		enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
++	}
+ 
+ 	/* all set, enable mac and interrupts, start dma engine and
+ 	 * kick rx dma channel */
+@@ -1015,26 +1046,26 @@ static int bcm_enet_open(struct net_devi
+ 	val |= ENET_CTL_ENABLE_MASK;
+ 	enet_writel(priv, val, ENET_CTL_REG);
+ 	enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+-	enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
+-			 ENETDMAC_CHANCFG_REG(priv->rx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_en_mask,
++			 ENETDMAC_CHANCFG, priv->rx_chan);
+ 
+ 	/* watch "mib counters about to overflow" interrupt */
+ 	enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
+ 	enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
+ 
+ 	/* watch "packet transferred" interrupt in rx and tx */
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->tx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IR, priv->rx_chan);
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IR, priv->tx_chan);
+ 
+ 	/* make sure we enable napi before rx interrupt  */
+ 	napi_enable(&priv->napi);
+ 
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IRMASK, priv->rx_chan);
++	enet_dmac_writel(priv, priv->dma_chan_int_mask,
++			 ENETDMAC_IRMASK, priv->tx_chan);
+ 
+ 	if (priv->has_phy)
+ 		phy_start(priv->phydev);
+@@ -1111,13 +1142,13 @@ static void bcm_enet_disable_dma(struct
+ {
+ 	int limit;
+ 
+-	enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG_REG(chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
+ 
+ 	limit = 1000;
+ 	do {
+ 		u32 val;
+ 
+-		val = enet_dmac_readl(priv, ENETDMAC_CHANCFG_REG(chan));
++		val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
+ 		if (!(val & ENETDMAC_CHANCFG_EN_MASK))
+ 			break;
+ 		udelay(1);
+@@ -1144,8 +1175,8 @@ static int bcm_enet_stop(struct net_devi
+ 
+ 	/* mask all interrupts */
+ 	enet_writel(priv, 0, ENET_IRMASK_REG);
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+ 
+ 	/* make sure no mib update is scheduled */
+ 	cancel_work_sync(&priv->mib_update_task);
+@@ -1757,6 +1788,11 @@ static int __devinit bcm_enet_probe(stru
+ 		priv->pause_tx = pd->pause_tx;
+ 		priv->force_duplex_full = pd->force_duplex_full;
+ 		priv->force_speed_100 = pd->force_speed_100;
++		priv->dma_chan_en_mask = pd->dma_chan_en_mask;
++		priv->dma_chan_int_mask = pd->dma_chan_int_mask;
++		priv->dma_chan_width = pd->dma_chan_width;
++		priv->dma_no_sram = pd->dma_no_sram;
++		priv->dma_desc_shift = pd->dma_desc_shift;
+ 	}
+ 
+ 	if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
+@@ -2144,8 +2180,8 @@ static int bcm_enetsw_open(struct net_de
+ 	kdev = &priv->pdev->dev;
+ 
+ 	/* mask all interrupts and request them */
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG, priv->rx_chan);
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG, priv->tx_chan);
+ 
+ 	ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
+ 			  IRQF_DISABLED, dev->name, dev);
+@@ -2269,23 +2305,23 @@ static int bcm_enetsw_open(struct net_de
+ 
+ 	/* write rx & tx ring addresses */
+ 	enet_dmas_writel(priv, priv->rx_desc_dma,
+-			 ENETDMAS_RSTART_REG(priv->rx_chan));
++			 ENETDMAS_RSTART_REG, priv->rx_chan);
+ 	enet_dmas_writel(priv, priv->tx_desc_dma,
+-			 ENETDMAS_RSTART_REG(priv->tx_chan));
++			 ENETDMAS_RSTART_REG, priv->tx_chan);
+ 
+ 	/* clear remaining state ram for rx & tx channel */
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->tx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->tx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->rx_chan));
+-	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
++	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
+ 
+ 	/* set dma maximum burst len */
+ 	enet_dmac_writel(priv, priv->dma_maxburst,
+-			 ENETDMAC_MAXBURST_REG(priv->rx_chan));
++			 ENETDMAC_MAXBURST_REG, priv->rx_chan);
+ 	enet_dmac_writel(priv, priv->dma_maxburst,
+-			 ENETDMAC_MAXBURST_REG(priv->tx_chan));
++			 ENETDMAC_MAXBURST_REG, priv->tx_chan);
+ 
+ 	/* set flow control low/high threshold to 1/3 / 2/3 */
+ 	val = priv->rx_ring_size / 3;
+@@ -2298,21 +2334,21 @@ static int bcm_enetsw_open(struct net_de
+ 	wmb();
+ 	enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+ 	enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
+-			 ENETDMAC_CHANCFG_REG(priv->rx_chan));
++			 ENETDMAC_CHANCFG_REG, priv->rx_chan);
+ 
+ 	/* watch "packet transferred" interrupt in rx and tx */
+ 	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->rx_chan));
++			 ENETDMAC_IR_REG, priv->rx_chan);
+ 	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IR_REG(priv->tx_chan));
++			 ENETDMAC_IR_REG, priv->tx_chan);
+ 
+ 	/* make sure we enable napi before rx interrupt  */
+ 	napi_enable(&priv->napi);
+ 
+ 	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->rx_chan));
++			 ENETDMAC_IRMASK_REG, priv->rx_chan);
+ 	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+-			 ENETDMAC_IRMASK_REG(priv->tx_chan));
++			 ENETDMAC_IRMASK_REG, priv->tx_chan);
+ 
+ 	netif_carrier_on(dev);
+ 	netif_start_queue(dev);
+@@ -2419,8 +2455,8 @@ static int bcm_enetsw_stop(struct net_de
+ 	del_timer_sync(&priv->rx_timeout);
+ 
+ 	/* mask all interrupts */
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
+-	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG, priv->rx_chan);
++	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG, priv->tx_chan);
+ 
+ 	/* disable dma & mac */
+ 	bcm_enet_disable_dma(priv, priv->tx_chan);
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
+@@ -367,6 +367,21 @@ struct bcm_enet_priv {
+ 	/* used to poll switch port state */
+ 	struct timer_list swphy_poll;
+ 	spinlock_t enetsw_mdio_lock;
++
++	/* dma channel enable mask */
++	u32 dma_chan_en_mask;
++
++	/* dma channel interrupt mask */
++	u32 dma_chan_int_mask;
++
++	/* dma engine has *no* internal SRAM */
++	unsigned int dma_no_sram;
++
++	/* dma channel width */
++	unsigned int dma_chan_width;
++
++	/* dma descriptor shift value */
++	unsigned int dma_desc_shift;
+ };
+ 
+ static inline int bcm_enet_port_is_rgmii(int portid)
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
+@@ -173,6 +173,7 @@ enum bcm63xx_regs_set {
+ #define BCM_6368_RSET_SPI_SIZE		1804
+ #define RSET_ENET_SIZE			2048
+ #define RSET_ENETDMA_SIZE		256
++#define RSET_6345_ENETDMA_SIZE		64
+ #define RSET_ENETDMAC_SIZE(chans)	(16 * (chans))
+ #define RSET_ENETDMAS_SIZE(chans)	(16 * (chans))
+ #define RSET_ENETSW_SIZE		65536
+@@ -299,7 +300,7 @@ enum bcm63xx_regs_set {
+ #define BCM_6345_USBDMA_BASE		(0xfffe2800)
+ #define BCM_6345_ENET0_BASE		(0xfffe1800)
+ #define BCM_6345_ENETDMA_BASE		(0xfffe2800)
+-#define BCM_6345_ENETDMAC_BASE		(0xfffe2900)
++#define BCM_6345_ENETDMAC_BASE		(0xfffe2840)
+ #define BCM_6345_ENETDMAS_BASE		(0xfffe2a00)
+ #define BCM_6345_ENETSW_BASE		(0xdeadbeef)
+ #define BCM_6345_PCMCIA_BASE		(0xfffe2028)
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_enet.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_enet.h
+@@ -4,6 +4,8 @@
+ #include <linux/if_ether.h>
+ #include <linux/init.h>
+ 
++#include <bcm63xx_regs.h>
++
+ /*
+  * on board ethernet platform data
+  */
+@@ -37,6 +39,21 @@ struct bcm63xx_enet_platform_data {
+ 					  int phy_id, int reg),
+ 			  void (*mii_write)(struct net_device *dev,
+ 					    int phy_id, int reg, int val));
++
++	/* DMA channel enable mask */
++	u32 dma_chan_en_mask;
++
++	/* DMA channel interrupt mask */
++	u32 dma_chan_int_mask;
++
++	/* Set to one if DMA engine has *no* SRAM */
++	unsigned int dma_no_sram;
++
++	/* DMA channel register width */
++	unsigned int dma_chan_width;
++
++	/* DMA descriptor shift */
++	unsigned int dma_desc_shift;
+ };
+ 
+ /*
+@@ -72,4 +89,66 @@ int __init bcm63xx_enet_register(int uni
+ int __init
+ bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd);
+ 
++enum bcm63xx_regs_enetdmac {
++	ENETDMAC_CHANCFG,
++	ENETDMAC_IR,
++	ENETDMAC_IRMASK,
++	ENETDMAC_MAXBURST,
++	ENETDMAC_BUFALLOC,
++	ENETDMAC_RSTART,
++	ENETDMAC_FC,
++	ENETDMAC_LEN,
++};
++
++static inline unsigned long bcm63xx_enetdmacreg(enum bcm63xx_regs_enetdmac reg)
++{
++#ifdef BCMCPU_RUNTIME_DETECT
++	extern const unsigned long *bcm63xx_regs_enetdmac;
++
++	return bcm63xx_regs_enetdmac[reg];
++#else
++#ifdef CONFIG_BCM63XX_CPU_6345
++	switch (reg) {
++	case ENETDMAC_CHANCFG:
++		return ENETDMA_6345_CHANCFG_REG;
++	case ENETDMAC_IR:
++		return ENETDMA_6345_IR_REG;
++	case ENETDMAC_IRMASK:
++		return ENETDMA_6345_IRMASK_REG;
++	case ENETDMAC_MAXBURST:
++		return ENETDMA_6345_MAXBURST_REG;
++	case ENETDMAC_BUFALLOC:
++		return ENETDMA_6345_BUFALLOC_REG;
++	case ENETDMAC_RSTART:
++		return ENETDMA_6345_RSTART_REG;
++	case ENETDMAC_FC:
++		return ENETDMA_6345_FC_REG;
++	case ENETDMAC_LEN:
++		return ENETDMA_6345_LEN_REG;
++	}
++#endif
++#if defined(CONFIG_BCM6XX_CPU_6338) || defined(CONFIG_BCM63XX_CPU_6348) \
++	defined(CONFIG_BCM63XX_CPU_6358) || defined(CONFIG_BCM63XX_CPU_6362) \
++	defined(CONFIG_BCM63XX_CPU_6368)
++	switch (reg) {
++	case ENETDMAC_CHANCFG:
++		return ENETDMAC_CHANCFG_REG;
++	case ENETDMAC_IR:
++		return ENETDMAC_IR_REG;
++	case ENETDMAC_IRMASK:
++		return ENETDMAC_IRMASK_REG;
++	case ENETDMAC_MAXBURST:
++		return ENETDMAC_MAXBURST_REG;
++	case ENETDMAC_BUFALLOC:
++	case ENETDMAC_RSTART:
++	case ENETDMAC_FC:
++	case ENETDMAC_LEN:
++		return 0;
++	}
++#endif
++#endif
++	return 0;
++}
++
++
+ #endif /* ! BCM63XX_DEV_ENET_H_ */