[PATCH 4/5] net: Add driver for Armada 370/XP 10/100/1000 Mbps network controller

[Ezequiel Garcia <ezequiel.garcia@free-electrons.com>]

This patch introduces the mvneta driver to support the network controller
found in Armada 370/XP SoCs.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
 drivers/net/Kconfig  |   6 +
 drivers/net/Makefile |   1 +
 drivers/net/mvneta.c | 758 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 765 insertions(+)
 create mode 100644 drivers/net/mvneta.c

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index c99fcc8..f6584d4 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -137,6 +137,12 @@ config DRIVER_NET_MPC5200
 	depends on ARCH_MPC5200
 	select PHYLIB
 
+config DRIVER_NET_MVNETA
+	bool "Marvell NETA"
+	depends on ARCH_MVEBU
+	select PHYLIB
+	select MDIO_MVEBU
+
 config DRIVER_NET_NETX
 	bool "Hilscher Netx ethernet driver"
 	depends on HAS_NETX_ETHER
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 1b85778..b124220 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_DRIVER_NET_KS8851_MLL)	+= ks8851_mll.o
 obj-$(CONFIG_DRIVER_NET_MACB)		+= macb.o
 obj-$(CONFIG_DRIVER_NET_MICREL)		+= ksz8864rmn.o
 obj-$(CONFIG_DRIVER_NET_MPC5200)	+= fec_mpc5200.o
+obj-$(CONFIG_DRIVER_NET_MVNETA)		+= mvneta.o
 obj-$(CONFIG_DRIVER_NET_NETX)		+= netx_eth.o
 obj-$(CONFIG_DRIVER_NET_ORION)		+= orion-gbe.o
 obj-$(CONFIG_DRIVER_NET_RTL8139)	+= rtl8139.o
diff --git a/drivers/net/mvneta.c b/drivers/net/mvneta.c
new file mode 100644
index 0000000..8768b0d
--- /dev/null
+++ b/drivers/net/mvneta.c
@@ -0,0 +1,758 @@
+/*
+ * (C) Copyright 2014 - Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
+ *
+ * based on mvneta driver from linux
+ *   (C) Copyright 2012 Marvell
+ *   Rami Rosen <rosenr@marvell.com>
+ *   Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * based on orion-gbe driver from barebox
+ *   (C) Copyright 2014
+ *   Pengutronix, Michael Grzeschik <mgr@pengutronix.de>
+ *   Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+#include <net.h>
+#include <of_net.h>
+#include <sizes.h>
+#include <asm/mmu.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/mbus.h>
+
+/* Registers */
+
+/* Rx queue */
+#define MVNETA_RXQ_CONFIG_REG(q)                (0x1400 + ((q) << 2))
+#define      MVNETA_RXQ_PKT_OFFSET_ALL_MASK     (0xf    << 8)
+#define      MVNETA_RXQ_PKT_OFFSET_MASK(offs)   ((offs) << 8)
+#define MVNETA_RXQ_THRESHOLD_REG(q)             (0x14c0 + ((q) << 2))
+#define      MVNETA_RXQ_NON_OCCUPIED(v)         ((v) << 16)
+#define MVNETA_RXQ_BASE_ADDR_REG(q)             (0x1480 + ((q) << 2))
+#define MVNETA_RXQ_SIZE_REG(q)                  (0x14a0 + ((q) << 2))
+#define      MVNETA_RXQ_BUF_SIZE_SHIFT          19
+#define      MVNETA_RXQ_BUF_SIZE_MASK           (0x1fff << 19)
+#define MVNETA_RXQ_STATUS_REG(q)                (0x14e0 + ((q) << 2))
+#define      MVNETA_RXQ_OCCUPIED_ALL_MASK       0x3fff
+#define MVNETA_RXQ_STATUS_UPDATE_REG(q)         (0x1500 + ((q) << 2))
+#define      MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT  16
+#define      MVNETA_RXQ_ADD_NON_OCCUPIED_MAX    255
+
+#define MVNETA_PORT_RX_RESET                    0x1cc0
+#define MVNETA_MBUS_RETRY                       0x2010
+#define MVNETA_UNIT_INTR_CAUSE                  0x2080
+#define MVNETA_UNIT_CONTROL                     0x20B0
+#define MVNETA_WIN_BASE(w)                      (0x2200 + ((w) << 3))
+#define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
+#define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
+#define MVNETA_BASE_ADDR_ENABLE                 0x2290
+#define MVNETA_PORT_CONFIG                      0x2400
+#define      MVNETA_DEF_RXQ(q)                  ((q) << 1)
+#define      MVNETA_DEF_RXQ_ARP(q)              ((q) << 4)
+#define      MVNETA_TX_UNSET_ERR_SUM            BIT(12)
+#define      MVNETA_DEF_RXQ_TCP(q)              ((q) << 16)
+#define      MVNETA_DEF_RXQ_UDP(q)              ((q) << 19)
+#define      MVNETA_DEF_RXQ_BPDU(q)             ((q) << 22)
+#define      MVNETA_RX_CSUM_WITH_PSEUDO_HDR     BIT(25)
+#define      MVNETA_PORT_CONFIG_DEFL_VALUE(q)   (MVNETA_DEF_RXQ(q)       | \
+						 MVNETA_DEF_RXQ_ARP(q)	 | \
+						 MVNETA_DEF_RXQ_TCP(q)	 | \
+						 MVNETA_DEF_RXQ_UDP(q)	 | \
+						 MVNETA_DEF_RXQ_BPDU(q)	 | \
+						 MVNETA_TX_UNSET_ERR_SUM | \
+						 MVNETA_RX_CSUM_WITH_PSEUDO_HDR)
+#define MVNETA_PORT_CONFIG_EXTEND                0x2404
+#define MVNETA_MAC_ADDR_LOW                      0x2414
+#define MVNETA_MAC_ADDR_HIGH                     0x2418
+#define MVNETA_SDMA_CONFIG                       0x241c
+#define      MVNETA_SDMA_BRST_SIZE_16            4
+#define      MVNETA_RX_BRST_SZ_MASK(burst)       ((burst) << 1)
+#define      MVNETA_RX_NO_DATA_SWAP              BIT(4)
+#define      MVNETA_TX_NO_DATA_SWAP              BIT(5)
+#define      MVNETA_DESC_SWAP                    BIT(6)
+#define      MVNETA_TX_BRST_SZ_MASK(burst)       ((burst) << 22)
+#define MVNETA_RX_MIN_FRAME_SIZE                 0x247c
+#define MVNETA_SERDES_CFG			 0x24a0
+#define      MVNETA_SGMII_SERDES		 0x0cc7
+#define      MVNETA_QSGMII_SERDES		 0x0667
+#define MVNETA_TYPE_PRIO                         0x24bc
+#define MVNETA_TXQ_CMD_1                         0x24e4
+#define MVNETA_TXQ_CMD                           0x2448
+#define      MVNETA_TXQ_DISABLE_SHIFT            8
+#define      MVNETA_TXQ_ENABLE_MASK              0x000000ff
+#define MVNETA_ACC_MODE                          0x2500
+#define MVNETA_CPU_MAP(cpu)                      (0x2540 + ((cpu) << 2))
+
+#define MVNETA_INTR_NEW_CAUSE                    0x25a0
+#define MVNETA_INTR_NEW_MASK                     0x25a4
+#define MVNETA_INTR_OLD_CAUSE                    0x25a8
+#define MVNETA_INTR_OLD_MASK                     0x25ac
+#define MVNETA_INTR_MISC_CAUSE                   0x25b0
+#define MVNETA_INTR_MISC_MASK                    0x25b4
+#define MVNETA_INTR_ENABLE                       0x25b8
+
+#define MVNETA_RXQ_CMD                           0x2680
+#define      MVNETA_RXQ_DISABLE_SHIFT            8
+#define      MVNETA_RXQ_ENABLE_MASK              0x000000ff
+#define MVETH_TXQ_TOKEN_COUNT_REG(q)             (0x2700 + ((q) << 4))
+#define MVETH_TXQ_TOKEN_CFG_REG(q)               (0x2704 + ((q) << 4))
+#define MVNETA_GMAC_CTRL_0                       0x2c00
+#define MVNETA_GMAC_CTRL_2                       0x2c08
+#define      MVNETA_GMAC2_PCS_ENABLE             BIT(3)
+#define      MVNETA_GMAC2_PORT_RGMII             BIT(4)
+#define      MVNETA_GMAC2_PORT_RESET             BIT(6)
+#define MVNETA_GMAC_AUTONEG_CONFIG               0x2c0c
+#define      MVNETA_GMAC_FORCE_LINK_DOWN         BIT(0)
+#define      MVNETA_GMAC_FORCE_LINK_PASS         BIT(1)
+#define      MVNETA_GMAC_CONFIG_MII_SPEED        BIT(5)
+#define      MVNETA_GMAC_CONFIG_GMII_SPEED       BIT(6)
+#define      MVNETA_GMAC_AN_SPEED_EN             BIT(7)
+#define      MVNETA_GMAC_CONFIG_FULL_DUPLEX      BIT(12)
+#define      MVNETA_GMAC_AN_DUPLEX_EN            BIT(13)
+#define MVNETA_MIB_COUNTERS_BASE                 0x3080
+#define      MVNETA_MIB_LATE_COLLISION           0x7c
+#define MVNETA_DA_FILT_SPEC_MCAST                0x3400
+#define MVNETA_DA_FILT_OTH_MCAST                 0x3500
+#define MVNETA_DA_FILT_UCAST_BASE                0x3600
+#define MVNETA_TXQ_BASE_ADDR_REG(q)              (0x3c00 + ((q) << 2))
+#define MVNETA_TXQ_SIZE_REG(q)                   (0x3c20 + ((q) << 2))
+#define MVNETA_TXQ_UPDATE_REG(q)                 (0x3c60 + ((q) << 2))
+#define      MVNETA_TXQ_DEC_SENT_SHIFT           16
+#define MVNETA_TXQ_STATUS_REG(q)                 (0x3c40 + ((q) << 2))
+#define MVNETA_PORT_TX_RESET                     0x3cf0
+#define MVNETA_TX_MTU                            0x3e0c
+#define MVNETA_TX_TOKEN_SIZE                     0x3e14
+#define MVNETA_TXQ_TOKEN_SIZE_REG(q)             (0x3e40 + ((q) << 2))
+
+/* The mvneta_tx_desc and mvneta_rx_desc structures describe the
+ * layout of the transmit and reception DMA descriptors, and their
+ * layout is therefore defined by the hardware design
+ */
+
+#define MVNETA_TX_L3_OFF_SHIFT	0
+#define MVNETA_TX_IP_HLEN_SHIFT	8
+#define MVNETA_TX_L4_UDP	BIT(16)
+#define MVNETA_TX_L3_IP6	BIT(17)
+#define MVNETA_TXD_IP_CSUM	BIT(18)
+#define MVNETA_TXD_Z_PAD	BIT(19)
+#define MVNETA_TXD_L_DESC	BIT(20)
+#define MVNETA_TXD_F_DESC	BIT(21)
+#define MVNETA_TXD_FLZ_DESC	(MVNETA_TXD_Z_PAD  | \
+				 MVNETA_TXD_L_DESC | \
+				 MVNETA_TXD_F_DESC)
+#define MVNETA_TX_L4_CSUM_FULL	BIT(30)
+#define MVNETA_TX_L4_CSUM_NOT	BIT(31)
+
+#define MVNETA_TXD_ERROR	BIT(0)
+#define TXD_ERROR_MASK		0x6
+#define TXD_ERROR_SHIFT		1
+
+#define MVNETA_RXD_ERR_CRC		0x0
+#define MVNETA_RXD_ERR_SUMMARY		BIT(16)
+#define MVNETA_RXD_ERR_OVERRUN		BIT(17)
+#define MVNETA_RXD_ERR_LEN		BIT(18)
+#define MVNETA_RXD_ERR_RESOURCE		(BIT(17) | BIT(18))
+#define MVNETA_RXD_ERR_CODE_MASK	(BIT(17) | BIT(18))
+#define MVNETA_RXD_L3_IP4		BIT(25)
+#define MVNETA_RXD_FIRST_LAST_DESC	(BIT(26) | BIT(27))
+#define MVNETA_RXD_L4_CSUM_OK		BIT(30)
+
+#define MVNETA_MH_SIZE		2
+#define TXQ_NUM			8
+#define RX_RING_SIZE		4
+#define TRANSFER_TIMEOUT	(10 * MSECOND)
+
+struct rxdesc {
+	u32  cmd_sts;		/* Info about received packet		*/
+	u16  reserved1;		/* pnc_info - (for future use, PnC)	*/
+	u16  data_size;		/* Size of received packet in bytes	*/
+
+	u32  buf_phys_addr;	/* Physical address of the buffer	*/
+	u32  reserved2;		/* pnc_flow_id  (for future use, PnC)	*/
+
+	u32  buf_cookie;	/* cookie for access to RX buffer in rx path */
+	u16  reserved3;		/* prefetch_cmd, for future use		*/
+	u16  reserved4;		/* csum_l4 - (for future use, PnC)	*/
+
+	u32  reserved5;		/* pnc_extra PnC (for future use, PnC)	*/
+	u32  reserved6;		/* hw_cmd (for future use, PnC and HWF)	*/
+};
+
+struct txdesc {
+	u32  cmd_sts;		/* Options used by HW for packet transmitting.*/
+	u16  reserverd1;	/* csum_l4 (for future use)		*/
+	u16  byte_cnt;		/* Data size of transmitted packet in bytes */
+	u32  buf_ptr;		/* Physical addr of transmitted buffer	*/
+	u8   error;		/*					*/
+	u8   reserved2;		/* Reserved - (for future use)		*/
+	u16  reserved3;		/* Reserved - (for future use)		*/
+	u32  reserved4[4];	/* Reserved - (for future use)		*/
+};
+
+struct mvneta_port {
+	void __iomem *reg;
+	struct device_d dev;
+	struct eth_device edev;
+	struct clk *clk;
+
+	struct txdesc *txdesc;
+	struct rxdesc *rxdesc;
+	int curr_rxdesc;
+	u8 *rxbuf;
+	phy_interface_t intf;
+};
+
+static void mvneta_conf_mbus_windows(struct mvneta_port *priv)
+{
+	const struct mbus_dram_target_info *dram = mvebu_mbus_dram_info();
+	u32 win_enable, win_protect;
+	int i;
+
+	for (i = 0; i < 6; i++) {
+		writel(0, priv->reg + MVNETA_WIN_BASE(i));
+		writel(0, priv->reg + MVNETA_WIN_SIZE(i));
+
+		if (i < 4)
+			writel(0, priv->reg + MVNETA_WIN_REMAP(i));
+	}
+
+	win_enable = 0x3f;
+	win_protect = 0;
+
+	for (i = 0; i < dram->num_cs; i++) {
+		const struct mbus_dram_window *cs = dram->cs + i;
+
+		writel((cs->base & 0xffff0000) |
+		       (cs->mbus_attr << 8) |
+		       dram->mbus_dram_target_id,
+		       priv->reg + MVNETA_WIN_BASE(i));
+
+		writel((cs->size - 1) & 0xffff0000,
+		       priv->reg + MVNETA_WIN_SIZE(i));
+
+		win_enable &= ~(1 << i);
+		win_protect |= 3 << (2 * i);
+	}
+
+	writel(win_enable, priv->reg + MVNETA_BASE_ADDR_ENABLE);
+}
+
+static void mvneta_clear_mcast_table(struct mvneta_port *priv)
+{
+	int offset;
+
+	for (offset = 0; offset <= 0xfc; offset += 4) {
+		writel(0, priv->reg + MVNETA_DA_FILT_UCAST_BASE + offset);
+		writel(0, priv->reg + MVNETA_DA_FILT_SPEC_MCAST + offset);
+		writel(0, priv->reg + MVNETA_DA_FILT_OTH_MCAST + offset);
+	}
+}
+
+/* Set unicast address */
+static void mvneta_set_ucast_addr(struct mvneta_port *priv, u8 last_nibble)
+{
+	unsigned int tbl_offset, reg_offset;
+	int queue = 0;
+	u32 val;
+
+	/* Locate the Unicast table entry */
+	last_nibble = (0xf & last_nibble);
+
+	/* offset from unicast tbl base */
+	tbl_offset = (last_nibble / 4) * 4;
+
+	/* offset within the above reg  */
+	reg_offset = last_nibble % 4;
+
+	val = readl(priv->reg + MVNETA_DA_FILT_UCAST_BASE + tbl_offset);
+
+	val &= ~(0xff << (8 * reg_offset));
+	val |= ((0x01 | (queue << 1)) << (8 * reg_offset));
+
+	writel(val, priv->reg + MVNETA_DA_FILT_UCAST_BASE + tbl_offset);
+}
+
+static void mvneta_clear_ucast_addr(struct mvneta_port *priv, u8 last_nibble)
+{
+	unsigned int tbl_offset, reg_offset;
+	u32 val;
+
+	/* Locate the Unicast table entry */
+	last_nibble = (0xf & last_nibble);
+
+	/* offset from unicast tbl base */
+	tbl_offset = (last_nibble / 4) * 4;
+
+	/* offset within the above reg  */
+	reg_offset = last_nibble % 4;
+
+	val = readl(priv->reg + MVNETA_DA_FILT_UCAST_BASE + tbl_offset);
+
+	/* Clear accepts frame bit at specified unicast DA tbl entry */
+	val &= ~(0xff << (8 * reg_offset));
+
+	writel(val, priv->reg + MVNETA_DA_FILT_UCAST_BASE + tbl_offset);
+}
+
+static void mvneta_rx_unicast_promisc_clear(struct mvneta_port *priv)
+{
+	u32 portcfg, val;
+
+	portcfg = readl(priv->reg + MVNETA_PORT_CONFIG);
+	val = readl(priv->reg + MVNETA_TYPE_PRIO);
+
+	/* Reject all Unicast addresses */
+	writel(portcfg & ~BIT(0), priv->reg + MVNETA_PORT_CONFIG);
+	writel(val & ~BIT(21), priv->reg + MVNETA_TYPE_PRIO);
+}
+
+/* Clear all MIB counters */
+static void mvneta_mib_counters_clear(struct mvneta_port *priv)
+{
+	int i;
+
+	/* Perform dummy reads from MIB counters */
+	for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4)
+		readl(priv->reg + MVNETA_MIB_COUNTERS_BASE + i);
+}
+
+static int mvneta_pending_tx(struct mvneta_port *priv)
+{
+	u32 val = readl(priv->reg + MVNETA_TXQ_STATUS_REG(0));
+
+	return val & 0x3fff;
+}
+
+static int mvneta_pending_rx(struct mvneta_port *priv)
+{
+	u32 val = readl(priv->reg + MVNETA_RXQ_STATUS_REG(0));
+
+	return val & 0x3fff;
+}
+
+static void mvneta_port_stop(struct mvneta_port *priv)
+{
+	u32 val;
+
+	/* Stop all queues */
+	writel(0xff << MVNETA_RXQ_DISABLE_SHIFT, priv->reg + MVNETA_RXQ_CMD);
+	writel(0xff << MVNETA_TXQ_DISABLE_SHIFT, priv->reg + MVNETA_TXQ_CMD);
+
+	/* Reset Tx */
+	writel(BIT(0), priv->reg + MVNETA_PORT_TX_RESET);
+	writel(0, priv->reg + MVNETA_PORT_TX_RESET);
+
+	/* Reset Rx */
+	writel(BIT(0), priv->reg + MVNETA_PORT_RX_RESET);
+	writel(0, priv->reg + MVNETA_PORT_RX_RESET);
+
+	/* Disable port 0 */
+	val = readl(priv->reg + MVNETA_GMAC_CTRL_0);
+	writel(val & ~BIT(0), priv->reg + MVNETA_GMAC_CTRL_0);
+	udelay(200);
+
+	/* Clear all Cause registers */
+	writel(0, priv->reg + MVNETA_INTR_NEW_CAUSE);
+	writel(0, priv->reg + MVNETA_INTR_OLD_CAUSE);
+	writel(0, priv->reg + MVNETA_INTR_MISC_CAUSE);
+	writel(0, priv->reg + MVNETA_UNIT_INTR_CAUSE);
+
+	/* Mask all interrupts */
+	writel(0, priv->reg + MVNETA_INTR_NEW_MASK);
+	writel(0, priv->reg + MVNETA_INTR_OLD_MASK);
+	writel(0, priv->reg + MVNETA_INTR_MISC_MASK);
+	writel(0, priv->reg + MVNETA_INTR_ENABLE);
+}
+
+static void mvneta_halt(struct eth_device *edev)
+{
+	mvneta_port_stop((struct mvneta_port *)edev->priv);
+}
+
+static int mvneta_send(struct eth_device *edev, void *data, int len)
+{
+	struct mvneta_port *priv = edev->priv;
+	struct txdesc *txdesc = priv->txdesc;
+	int ret, error, last_desc;
+
+	/* Flush transmit data */
+	dma_flush_range((unsigned long)data, (unsigned long)data+len);
+
+	/* Fill the Tx descriptor */
+	txdesc->cmd_sts |= MVNETA_TX_L4_CSUM_NOT | MVNETA_TXD_FLZ_DESC;
+	txdesc->buf_ptr = (u32)data;
+	txdesc->byte_cnt = len;
+
+	/* Increase the number of prepared descriptors (one), by writing
+	 * to the 'NoOfWrittenDescriptors' field in the PTXSU register.
+	 */
+	writel(1, priv->reg + MVNETA_TXQ_UPDATE_REG(0));
+
+	/* The controller updates the number of transmitted descriptors in
+	 * the Tx port status register (PTXS).
+	 */
+	ret = wait_on_timeout(TRANSFER_TIMEOUT, !mvneta_pending_tx(priv));
+	if (ret) {
+		dev_err(&edev->dev, "transmit timeout\n");
+		return ret;
+	}
+
+	last_desc = readl(&txdesc->cmd_sts) & MVNETA_TXD_L_DESC;
+	error = readl(&txdesc->error);
+	if (last_desc && error & MVNETA_TXD_ERROR) {
+		dev_err(&edev->dev, "transmit error %d\n",
+			(error & TXD_ERROR_MASK) >> TXD_ERROR_SHIFT);
+		return -EIO;
+	}
+
+	/* Release the transmitted descriptor by writing to the
+	 * 'NoOfReleasedBuffers' field in the PTXSU register.
+	 */
+	writel(1 << MVNETA_TXQ_DEC_SENT_SHIFT,
+	       priv->reg + MVNETA_TXQ_UPDATE_REG(0));
+
+	return 0;
+}
+
+static int mvneta_recv(struct eth_device *edev)
+{
+	struct mvneta_port *priv = edev->priv;
+	struct rxdesc *rxdesc = &priv->rxdesc[priv->curr_rxdesc];
+	int ret, pending;
+	u32 cmd_sts;
+
+	/* wait for received packet */
+	pending = mvneta_pending_rx(priv);
+	if (!pending)
+		return 0;
+
+	/* drop malicious packets */
+	cmd_sts = readl(&rxdesc->cmd_sts);
+	if ((cmd_sts & MVNETA_RXD_FIRST_LAST_DESC) !=
+	    MVNETA_RXD_FIRST_LAST_DESC) {
+		dev_err(&edev->dev, "rx packet spread on multiple descriptors\n");
+		ret = -EIO;
+		goto recv_err;
+	}
+
+	if (cmd_sts & MVNETA_RXD_ERR_SUMMARY) {
+		dev_err(&edev->dev, "receive error\n");
+		ret = -EIO;
+		goto recv_err;
+	}
+
+	/* invalidate current receive buffer */
+	dma_inv_range((unsigned long)rxdesc->buf_phys_addr,
+		      (unsigned long)rxdesc->buf_phys_addr +
+		      ALIGN(PKTSIZE, 8));
+
+	/* received packet is padded with two null bytes (Marvell header) */
+	net_receive(edev, (void *)(rxdesc->buf_phys_addr + MVNETA_MH_SIZE),
+			  rxdesc->data_size - MVNETA_MH_SIZE);
+	ret = 0;
+
+recv_err:
+	/* reset this and get next rx descriptor*/
+	rxdesc->data_size = 0;
+	rxdesc->cmd_sts = 0;
+
+	priv->curr_rxdesc++;
+	if (priv->curr_rxdesc == RX_RING_SIZE)
+		priv->curr_rxdesc = 0;
+
+	/* Descriptor processed and refilled */
+	writel(1 | 1 << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT,
+	       priv->reg + MVNETA_RXQ_STATUS_UPDATE_REG(0));
+	return ret;
+}
+
+static int mvneta_set_ethaddr(struct eth_device *edev, unsigned char *mac)
+{
+	struct mvneta_port *priv = edev->priv;
+	u32 mac_h = (mac[0] << 24) | (mac[1] << 16) | (mac[2] << 8) | mac[3];
+	u32 mac_l = (mac[4] << 8) | mac[5];
+
+	mvneta_clear_ucast_addr(priv, mac[5]);
+
+	writel(mac_l, priv->reg + MVNETA_MAC_ADDR_LOW);
+	writel(mac_h, priv->reg + MVNETA_MAC_ADDR_HIGH);
+
+	/* accept frames for this address */
+	mvneta_set_ucast_addr(priv, mac[5]);
+
+	return 0;
+}
+
+static int mvneta_get_ethaddr(struct eth_device *edev, unsigned char *mac)
+{
+	struct mvneta_port *priv = edev->priv;
+	u32 mac_l = readl(priv->reg + MVNETA_MAC_ADDR_LOW);
+	u32 mac_h = readl(priv->reg + MVNETA_MAC_ADDR_HIGH);
+
+	mac[0] = (mac_h >> 24) & 0xff;
+	mac[1] = (mac_h >> 16) & 0xff;
+	mac[2] = (mac_h >> 8) & 0xff;
+	mac[3] = mac_h & 0xff;
+	mac[4] = (mac_l >> 8) & 0xff;
+	mac[5] = mac_l & 0xff;
+
+	return 0;
+}
+
+static void mvneta_adjust_link(struct eth_device *edev)
+{
+	struct mvneta_port *priv = edev->priv;
+	struct phy_device *phy = edev->phydev;
+	u32 val;
+
+	if (!phy->link)
+		return;
+
+	val = readl(priv->reg + MVNETA_GMAC_AUTONEG_CONFIG);
+	val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED |
+		 MVNETA_GMAC_CONFIG_GMII_SPEED |
+		 MVNETA_GMAC_CONFIG_FULL_DUPLEX |
+		 MVNETA_GMAC_AN_SPEED_EN |
+		 MVNETA_GMAC_AN_DUPLEX_EN);
+
+	if (phy->speed == SPEED_1000)
+		val |= MVNETA_GMAC_CONFIG_GMII_SPEED;
+	else if (phy->speed == SPEED_100)
+		val |= MVNETA_GMAC_CONFIG_MII_SPEED;
+
+	if (phy->duplex)
+		val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX;
+
+	val |= MVNETA_GMAC_FORCE_LINK_PASS | MVNETA_GMAC_FORCE_LINK_DOWN;
+
+	writel(val, priv->reg + MVNETA_GMAC_AUTONEG_CONFIG);
+
+	mvneta_mib_counters_clear(priv);
+
+	/* Enable first Tx and first Rx queues */
+	writel(BIT(0), priv->reg + MVNETA_TXQ_CMD);
+	writel(BIT(0), priv->reg + MVNETA_RXQ_CMD);
+}
+
+static int mvneta_open(struct eth_device *edev)
+{
+	struct mvneta_port *priv = edev->priv;
+	int ret;
+	u32 val;
+
+	ret = phy_device_connect(&priv->edev, NULL, -1,
+				 mvneta_adjust_link, 0, priv->intf);
+	if (ret)
+		return ret;
+
+	/* Enable the first port */
+	val = readl(priv->reg + MVNETA_GMAC_CTRL_0);
+	writel(val | BIT(0), priv->reg + MVNETA_GMAC_CTRL_0);
+
+	return 0;
+}
+
+static void mvneta_init_rx_ring(struct mvneta_port *priv)
+{
+	int i;
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct rxdesc *desc = &priv->rxdesc[i];
+
+		desc->buf_phys_addr = (u32)priv->rxbuf + i * ALIGN(PKTSIZE, 8);
+	}
+
+	priv->curr_rxdesc = 0;
+}
+
+void mvneta_setup_tx_rx(struct mvneta_port *priv)
+{
+	u32 val;
+
+	/* Allocate descriptors and buffers */
+	priv->txdesc = dma_alloc_coherent(ALIGN(sizeof(*priv->txdesc), 32));
+	priv->rxdesc = dma_alloc_coherent(RX_RING_SIZE *
+					  ALIGN(sizeof(*priv->rxdesc), 32));
+	priv->rxbuf = dma_alloc(RX_RING_SIZE * ALIGN(PKTSIZE, 8));
+
+	mvneta_init_rx_ring(priv);
+
+	/* Configure the Rx queue */
+	val = readl(priv->reg + MVNETA_RXQ_CONFIG_REG(0));
+	val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK;
+	writel(val, priv->reg + MVNETA_RXQ_CONFIG_REG(0));
+
+	/* Configure the Tx descriptor */
+	writel(1, priv->reg + MVNETA_TXQ_SIZE_REG(0));
+	writel((u32)priv->txdesc, priv->reg + MVNETA_TXQ_BASE_ADDR_REG(0));
+
+	/* Configure the Rx descriptor. Packet size is in 8-byte units. */
+	val = RX_RING_SIZE;
+	val |= ((PKTSIZE >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT);
+	writel(val , priv->reg + MVNETA_RXQ_SIZE_REG(0));
+	writel((u32)priv->rxdesc, priv->reg + MVNETA_RXQ_BASE_ADDR_REG(0));
+
+	/* Set the number of available Rx descriptors */
+	writel(RX_RING_SIZE << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT,
+	       priv->reg + MVNETA_RXQ_STATUS_UPDATE_REG(0));
+}
+
+static int mvneta_port_config(struct mvneta_port *priv)
+{
+	int queue;
+	u32 val;
+
+	/* Enable MBUS Retry bit16 */
+	writel(0x20, priv->reg + MVNETA_MBUS_RETRY);
+
+	/* Map the first Tx queue and first Rx queue to CPU0 */
+	writel(BIT(0) | (BIT(0) << 8), priv->reg + MVNETA_CPU_MAP(0));
+
+	/* Reset Tx/Rx DMA */
+	writel(BIT(0), priv->reg + MVNETA_PORT_TX_RESET);
+	writel(BIT(0), priv->reg + MVNETA_PORT_RX_RESET);
+
+	/* Disable Legacy WRR, Disable EJP, Release from reset */
+	writel(0, priv->reg + MVNETA_TXQ_CMD_1);
+
+	/* Set maximum bandwidth for the first TX queue */
+	writel(0x3ffffff, priv->reg + MVETH_TXQ_TOKEN_CFG_REG(0));
+	writel(0x3ffffff, priv->reg + MVETH_TXQ_TOKEN_COUNT_REG(0));
+
+	/* Minimum bandwidth on the rest of them */
+	for (queue = 1; queue < TXQ_NUM; queue++) {
+		writel(0, priv->reg + MVETH_TXQ_TOKEN_COUNT_REG(queue));
+		writel(0, priv->reg + MVETH_TXQ_TOKEN_CFG_REG(queue));
+	}
+
+	writel(0, priv->reg + MVNETA_PORT_RX_RESET);
+	writel(0, priv->reg + MVNETA_PORT_TX_RESET);
+
+	/* Disable hardware PHY polling */
+	val = readl(priv->reg + MVNETA_UNIT_CONTROL);
+	writel(val & ~BIT(1), priv->reg + MVNETA_UNIT_CONTROL);
+
+	/* Port Acceleration Mode */
+	writel(0x1, priv->reg + MVNETA_ACC_MODE);
+
+	/* Port default configuration for the first Rx queue */
+	val = MVNETA_PORT_CONFIG_DEFL_VALUE(0);
+	writel(val, priv->reg + MVNETA_PORT_CONFIG);
+	writel(0, priv->reg + MVNETA_PORT_CONFIG_EXTEND);
+	writel(64, priv->reg + MVNETA_RX_MIN_FRAME_SIZE);
+
+	/* Default burst size */
+	val = 0;
+	val |= MVNETA_TX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16);
+	val |= MVNETA_RX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16);
+	val |= MVNETA_RX_NO_DATA_SWAP | MVNETA_TX_NO_DATA_SWAP;
+	writel(val, priv->reg + MVNETA_SDMA_CONFIG);
+
+	mvneta_clear_mcast_table(priv);
+	mvneta_rx_unicast_promisc_clear(priv);
+
+	/* Configure maximum MTU and token size */
+	writel(0x0003ffff, priv->reg + MVNETA_TX_MTU);
+	writel(0xffffffff, priv->reg + MVNETA_TX_TOKEN_SIZE);
+	writel(0x7fffffff, priv->reg + MVNETA_TXQ_TOKEN_SIZE_REG(0));
+
+	val = readl(priv->reg + MVNETA_GMAC_CTRL_2);
+
+	/* Even though it might look weird, when we're configured in
+	 * SGMII or QSGMII mode, the RGMII bit needs to be set.
+	 */
+	switch (priv->intf) {
+	case PHY_INTERFACE_MODE_QSGMII:
+		writel(MVNETA_QSGMII_SERDES, priv->reg + MVNETA_SERDES_CFG);
+		val |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII;
+		break;
+	case PHY_INTERFACE_MODE_SGMII:
+		writel(MVNETA_SGMII_SERDES, priv->reg + MVNETA_SERDES_CFG);
+		val |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII;
+		break;
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+		val |= MVNETA_GMAC2_PORT_RGMII;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Cancel Port Reset */
+	val &= ~MVNETA_GMAC2_PORT_RESET;
+	writel(val, priv->reg + MVNETA_GMAC_CTRL_2);
+	while (readl(priv->reg + MVNETA_GMAC_CTRL_2) & MVNETA_GMAC2_PORT_RESET)
+		continue;
+
+	return 0;
+}
+
+static int mvneta_probe(struct device_d *dev)
+{
+	struct mvneta_port *priv;
+	int ret;
+
+	priv = xzalloc(sizeof(*priv));
+
+	priv->reg = dev_get_mem_region(dev, 0);
+
+	priv->clk = clk_get(dev, 0);
+	if (IS_ERR(priv->clk))
+		return PTR_ERR(priv->clk);
+	clk_enable(priv->clk);
+
+	ret = of_get_phy_mode(dev->device_node);
+	if (ret < 0)
+		return ret;
+	priv->intf = ret;
+
+	mvneta_port_stop(priv);
+
+	ret = mvneta_port_config(priv);
+	if (ret)
+		return ret;
+
+	mvneta_conf_mbus_windows(priv);
+	mvneta_setup_tx_rx(priv);
+
+	/* register eth device */
+	priv->edev.priv = priv;
+	priv->edev.open = mvneta_open;
+	priv->edev.send = mvneta_send;
+	priv->edev.recv = mvneta_recv;
+	priv->edev.halt = mvneta_halt;
+	priv->edev.set_ethaddr = mvneta_set_ethaddr;
+	priv->edev.get_ethaddr = mvneta_get_ethaddr;
+	priv->edev.parent = dev;
+
+	ret = eth_register(&priv->edev);
+	if (ret)
+		return ret;
+	return 0;
+}
+
+static struct of_device_id mvneta_dt_ids[] = {
+	{ .compatible = "marvell,armada-370-neta", },
+	{ }
+};
+
+static struct driver_d mvneta_driver = {
+	.name   = "mvneta",
+	.probe  = mvneta_probe,
+	.of_compatible = DRV_OF_COMPAT(mvneta_dt_ids),
+};
+device_platform_driver(mvneta_driver);
-- 
2.0.1


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