[U-Boot] [PATCH 25/26] net: axi_ethernet: Add driver to u-boot

Michal Simek
2011-09-13T07:10:20Z

Add axi_ethernet driver for little-endian Microblaze.

RX/TX BDs and rxframe buffer are shared among all axi_ethernet MACs.
Only one MAC can work in one time.

Signed-off-by: Michal Simek <monstr@monstr.eu>

---

v2: Fix cammelcase weirdness
Create mdio_wait function with timeouts
Synchronize debug messages
Remove base address + offset notation -> use struct instead

v3: Fix comments
Add timeouts/delays to waiting loops
Use in/out_be32 for dma accesses
Setup return values for phy functions
---
drivers/net/Makefile | 1 +
drivers/net/xilinx_axi_emac.c | 664 +++++++++++++++++++++++++++++++++++++++++
include/netdev.h | 2 +
3 files changed, 667 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/xilinx_axi_emac.c

diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 819b197..0489ffa 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -83,6 +83,7 @@ COBJS-$(CONFIG_TSEC_ENET) += tsec.o fsl_mdio.o
COBJS-$(CONFIG_TSI108_ETH) += tsi108_eth.o
COBJS-$(CONFIG_ULI526X) += uli526x.o
COBJS-$(CONFIG_VSC7385_ENET) += vsc7385.o
+COBJS-$(CONFIG_XILINX_AXIEMAC) += xilinx_axi_emac.o
COBJS-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o

COBJS := $(sort $(COBJS-y))
diff --git a/drivers/net/xilinx_axi_emac.c b/drivers/net/xilinx_axi_emac.c
new file mode 100644
index 0000000..82e254b
--- /dev/null
+++ b/drivers/net/xilinx_axi_emac.c
@@ -0,0 +1,664 @@
+/*
+ * Copyright (C) 2011 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2011 PetaLogix
+ * Copyright (C) 2010 Xilinx, Inc. All rights reserved.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <net.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <phy.h>
+#include <miiphy.h>
+
+#if !defined(CONFIG_PHYLIB)
+# error AXI_ETHERNET requires PHYLIB
+#endif
+
+/* Link setup */
+#define XAE_EMMC_LINKSPEED_MASK 0xC0000000 /* Link speed */
+#define XAE_EMMC_LINKSPD_10 0x00000000 /* Link Speed mask for 10 Mbit */
+#define XAE_EMMC_LINKSPD_100 0x40000000 /* Link Speed mask for 100 Mbit */
+#define XAE_EMMC_LINKSPD_1000 0x80000000 /* Link Speed mask for 1000 Mbit */
+
+/* Interrupt Status/Enable/Mask Registers bit definitions */
+#define XAE_INT_RXRJECT_MASK 0x00000008 /* Rx frame rejected */
+#define XAE_INT_MGTRDY_MASK 0x00000080 /* MGT clock Lock */
+
+/* Receive Configuration Word 1 (RCW1) Register bit definitions */
+#define XAE_RCW1_RX_MASK 0x10000000 /* Receiver enable */
+
+/* Transmitter Configuration (TC) Register bit definitions */
+#define XAE_TC_TX_MASK 0x10000000 /* Transmitter enable */
+
+#define XAE_UAW1_UNICASTADDR_MASK 0x0000FFFF
+
+/* MDIO Management Configuration (MC) Register bit definitions */
+#define XAE_MDIO_MC_MDIOEN_MASK 0x00000040 /* MII management enable*/
+
+/* MDIO Management Control Register (MCR) Register bit definitions */
+#define XAE_MDIO_MCR_PHYAD_MASK 0x1F000000 /* Phy Address Mask */
+#define XAE_MDIO_MCR_PHYAD_SHIFT 24 /* Phy Address Shift */
+#define XAE_MDIO_MCR_REGAD_MASK 0x001F0000 /* Reg Address Mask */
+#define XAE_MDIO_MCR_REGAD_SHIFT 16 /* Reg Address Shift */
+#define XAE_MDIO_MCR_OP_READ_MASK 0x00008000 /* Op Code Read Mask */
+#define XAE_MDIO_MCR_OP_WRITE_MASK 0x00004000 /* Op Code Write Mask */
+#define XAE_MDIO_MCR_INITIATE_MASK 0x00000800 /* Ready Mask */
+#define XAE_MDIO_MCR_READY_MASK 0x00000080 /* Ready Mask */
+
+#define XAE_MDIO_DIV_DFT 29 /* Default MDIO clock divisor */
+
+/* DMA macros */
+/* Bitmasks of XAXIDMA_CR_OFFSET register */
+#define XAXIDMA_CR_RUNSTOP_MASK 0x00000001 /* Start/stop DMA channel */
+#define XAXIDMA_CR_RESET_MASK 0x00000004 /* Reset DMA engine */
+
+/* Bitmasks of XAXIDMA_SR_OFFSET register */
+#define XAXIDMA_HALTED_MASK 0x00000001 /* DMA channel halted */
+
+/* Bitmask for interrupts */
+#define XAXIDMA_IRQ_IOC_MASK 0x00001000 /* Completion intr */
+#define XAXIDMA_IRQ_DELAY_MASK 0x00002000 /* Delay interrupt */
+#define XAXIDMA_IRQ_ALL_MASK 0x00007000 /* All interrupts */
+
+/* Bitmasks of XAXIDMA_BD_CTRL_OFFSET register */
+#define XAXIDMA_BD_CTRL_TXSOF_MASK 0x08000000 /* First tx packet */
+#define XAXIDMA_BD_CTRL_TXEOF_MASK 0x04000000 /* Last tx packet */
+
+#define DMAALIGN 128
+
+static u8 rxframe[PKTSIZE_ALIGN] __attribute((aligned(DMAALIGN)));
+
+/* Reflect dma offsets */
+struct axidma_reg {
+ u32 control; /* DMACR */
+ u32 status; /* DMASR */
+ u32 current; /* CURDESC */
+ u32 reserved;
+ u32 tail; /* TAILDESC */
+};
+
+/* Private driver structures */
+struct axidma_priv {
+ struct axidma_reg *dmatx;
+ struct axidma_reg *dmarx;
+ int phyaddr;
+
+ struct phy_device *phydev;
+ struct mii_dev *bus;
+};
+
+/* BD descriptors */
+struct axidma_bd {
+ u32 next; /* Next descriptor pointer */
+ u32 reserved1;
+ u32 phys; /* Buffer address */
+ u32 reserved2;
+ u32 reserved3;
+ u32 reserved4;
+ u32 cntrl; /* Control */
+ u32 status; /* Status */
+ u32 app0;
+ u32 app1; /* TX start << 16 | insert */
+ u32 app2; /* TX csum seed */
+ u32 app3;
+ u32 app4;
+ u32 sw_id_offset;
+ u32 reserved5;
+ u32 reserved6;
+};
+
+/* Static BDs - driver uses only one BD */
+static struct axidma_bd tx_bd __attribute((aligned(DMAALIGN)));
+static struct axidma_bd rx_bd __attribute((aligned(DMAALIGN)));
+
+struct axi_regs {
+ u32 reserved[3];
+ u32 is; /* 0xC: Interrupt status */
+ u32 reserved2;
+ u32 ie; /* 0x14: Interrupt enable */
+ u32 reserved3[251];
+ u32 rcw1; /* 0x404: Rx Configuration Word 1 */
+ u32 tc; /* 0x408: Tx Configuration */
+ u32 reserved4;
+ u32 emmc; /* 0x410: EMAC mode configuration */
+ u32 reserved5[59];
+ u32 mdio_mc; /* 0x500: MII Management Config */
+ u32 mdio_mcr; /* 0x504: MII Management Control */
+ u32 mdio_mwd; /* 0x508: MII Management Write Data */
+ u32 mdio_mrd; /* 0x50C: MII Management Read Data */
+ u32 reserved6[124];
+ u32 uaw0; /* 0x700: Unicast address word 0 */
+ u32 uaw1; /* 0x704: Unicast address word 1 */
+};
+
+/* Use MII register 1 (MII status register) to detect PHY */
+#define PHY_DETECT_REG 1
+
+/*
+ * Mask used to verify certain PHY features (or register contents)
+ * in the register above:
+ * 0x1000: 10Mbps full duplex support
+ * 0x0800: 10Mbps half duplex support
+ * 0x0008: Auto-negotiation support
+ */
+#define PHY_DETECT_MASK 0x1808
+
+static inline int mdio_wait(struct eth_device *dev)
+{
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ u32 timeout = 200;
+
+ /* Wait till MDIO interface is ready to accept a new transaction. */
+ while (timeout && (!(in_be32(&regs->mdio_mcr)
+ & XAE_MDIO_MCR_READY_MASK))) {
+ timeout--;
+ udelay(1);
+ }
+ if (!timeout) {
+ printf("%s: Timeout\n", __func__);
+ return 1;
+ }
+ return 0;
+}
+
+static u32 phyread(struct eth_device *dev, u32 phyaddress, u32 registernum,
+ u16 *val)
+{
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ u32 mdioctrlreg = 0;
+
+ if (mdio_wait(dev))
+ return 1;
+
+ mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
+ XAE_MDIO_MCR_PHYAD_MASK) |
+ ((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
+ & XAE_MDIO_MCR_REGAD_MASK) |
+ XAE_MDIO_MCR_INITIATE_MASK |
+ XAE_MDIO_MCR_OP_READ_MASK;
+
+ out_be32(&regs->mdio_mcr, mdioctrlreg);
+
+ if (mdio_wait(dev))
+ return 1;
+
+ /* Read data */
+ *val = in_be32(&regs->mdio_mrd);
+ return 0;
+}
+
+static u32 phywrite(struct eth_device *dev, u32 phyaddress, u32 registernum,
+ u32 data)
+{
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ u32 mdioctrlreg = 0;
+
+ if (mdio_wait(dev))
+ return 1;
+
+ mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
+ XAE_MDIO_MCR_PHYAD_MASK) |
+ ((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
+ & XAE_MDIO_MCR_REGAD_MASK) |
+ XAE_MDIO_MCR_INITIATE_MASK |
+ XAE_MDIO_MCR_OP_WRITE_MASK;
+
+ /* Write data */
+ out_be32(&regs->mdio_mwd, data);
+
+ out_be32(&regs->mdio_mcr, mdioctrlreg);
+
+ if (mdio_wait(dev))
+ return 1;
+
+ return 0;
+}
+
+/* Setting axi emac and phy to proper setting */
+static int setup_phy(struct eth_device *dev)
+{
+ u16 phyreg;
+ u32 i, speed, emmc_reg, ret;
+ struct axidma_priv *priv = dev->priv;
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ struct phy_device *phydev;
+
+ u32 supported = SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_100baseT_Full |
+ SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full;
+
+ if (priv->phyaddr == -1) {
+ /* Detect the PHY address */
+ for (i = 31; i >= 0; i--) {
+ ret = phyread(dev, i, PHY_DETECT_REG, &phyreg);
+ if (!ret && (phyreg != 0xFFFF) &&
+ ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
+ /* Found a valid PHY address */
+ priv->phyaddr = i;
+ debug("axiemac: Found valid phy address, %x\n",
+ phyreg);
+ break;
+ }
+ }
+ }
+
+ /* Interface - look at tsec */
+ phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
+
+ phydev->supported &= supported;
+ phydev->advertising = phydev->supported;
+ priv->phydev = phydev;
+ phy_config(phydev);
+ phy_startup(phydev);
+
+ switch (phydev->speed) {
+ case 1000:
+ speed = XAE_EMMC_LINKSPD_1000;
+ break;
+ case 100:
+ speed = XAE_EMMC_LINKSPD_100;
+ break;
+ case 10:
+ speed = XAE_EMMC_LINKSPD_10;
+ break;
+ default:
+ return 0;
+ }
+
+ /* Setup the emac for the phy speed */
+ emmc_reg = in_be32(&regs->emmc);
+ emmc_reg &= ~XAE_EMMC_LINKSPEED_MASK;
+ emmc_reg |= speed;
+
+ /* Write new speed setting out to Axi Ethernet */
+ out_be32(&regs->emmc, emmc_reg);
+
+ /*
+ * Setting the operating speed of the MAC needs a delay. There
+ * doesn't seem to be register to poll, so please consider this
+ * during your application design.
+ */
+ udelay(1);
+
+ return 1;
+}
+
+/* STOP DMA transfers */
+static void axiemac_halt(struct eth_device *dev)
+{
+ struct axidma_priv *priv = dev->priv;
+ u32 temp;
+
+ /* Stop the hardware */
+ temp = in_be32(&priv->dmatx->control);
+ temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
+ out_be32(&priv->dmatx->control, temp);
+
+ temp = in_be32(&priv->dmarx->control);
+ temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
+ out_be32(&priv->dmarx->control, temp);
+
+ debug("axiemac: Halted\n");
+}
+
+static int axi_ethernet_init(struct eth_device *dev)
+{
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ u32 timeout = 200;
+
+ /*
+ * Check the status of the MgtRdy bit in the interrupt status
+ * registers. This must be done to allow the MGT clock to become stable
+ * for the Sgmii and 1000BaseX PHY interfaces. No other register reads
+ * will be valid until this bit is valid.
+ * The bit is always a 1 for all other PHY interfaces.
+ */
+ while (timeout && (!(in_be32(&regs->is) & XAE_INT_MGTRDY_MASK))) {
+ timeout--;
+ udelay(1);
+ }
+ if (!timeout) {
+ printf("%s: Timeout\n", __func__);
+ return 1;
+ }
+
+ /* Stop the device and reset HW */
+ /* Disable interrupts */
+ out_be32(&regs->ie, 0);
+
+ /* Disable the receiver */
+ out_be32(&regs->rcw1, in_be32(&regs->rcw1) & ~XAE_RCW1_RX_MASK);
+
+ /*
+ * Stopping the receiver in mid-packet causes a dropped packet
+ * indication from HW. Clear it.
+ */
+ /* Set the interrupt status register to clear the interrupt */
+ out_be32(&regs->is, XAE_INT_RXRJECT_MASK);
+
+ /* Setup HW */
+ /* Set default MDIO divisor */
+ out_be32(&regs->mdio_mc, XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK);
+
+ debug("axiemac: InitHw done\n");
+ return 0;
+}
+
+static int axiemac_setup_mac(struct eth_device *dev)
+{
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+
+ /* Set the MAC address */
+ int val = ((dev->enetaddr[3] << 24) | (dev->enetaddr[2] << 16) |
+ (dev->enetaddr[1] << 8) | (dev->enetaddr[0]));
+ out_be32(&regs->uaw0, val);
+
+ val = (dev->enetaddr[5] << 8) | dev->enetaddr[4] ;
+ val |= in_be32(&regs->uaw1) & ~XAE_UAW1_UNICASTADDR_MASK;
+ out_be32(&regs->uaw1, val);
+ return 0;
+}
+
+/* Reset DMA engine */
+static void axi_dma_init(struct eth_device *dev)
+{
+ struct axidma_priv *priv = dev->priv;
+ u32 timeout = 500;
+
+ /* Reset the engine so the hardware starts from a known state */
+ out_be32(&priv->dmatx->control, XAXIDMA_CR_RESET_MASK);
+ out_be32(&priv->dmarx->control, XAXIDMA_CR_RESET_MASK);
+
+ /* At the initialization time, hardware should finish reset quickly */
+ while (timeout--) {
+ /* Check transmit/receive channel */
+ /* Reset is done when the reset bit is low */
+ if (!(in_be32(&priv->dmatx->control) |
+ in_be32(&priv->dmarx->control))
+ & XAXIDMA_CR_RESET_MASK) {
+ break;
+ }
+ }
+ if (!timeout)
+ printf("%s: Timeout\n", __func__);
+}
+
+static int axiemac_init(struct eth_device *dev, bd_t * bis)
+{
+ struct axidma_priv *priv = dev->priv;
+ struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+ u32 temp;
+
+ debug("axiemac: Init started\n");
+ /*
+ * Initialize AXIDMA engine. AXIDMA engine must be initialized before
+ * AxiEthernet. During AXIDMA engine initialization, AXIDMA hardware is
+ * reset, and since AXIDMA reset line is connected to AxiEthernet, this
+ * would ensure a reset of AxiEthernet.
+ */
+ axi_dma_init(dev);
+
+ /* Initialize AxiEthernet hardware. */
+ if (axi_ethernet_init(dev))
+ return -1;
+
+ /* Disable all RX interrupts before RxBD space setup */
+ temp = in_be32(&priv->dmarx->control);
+ temp &= ~XAXIDMA_IRQ_ALL_MASK;
+ out_be32(&priv->dmarx->control, temp);
+
+ /* Start DMA RX channel. Now it's ready to receive data.*/
+ out_be32(&priv->dmarx->current, (u32)&rx_bd);
+
+ /* Setup the BD. */
+ memset(&rx_bd, 0, sizeof(rx_bd));
+ rx_bd.next = (u32)&rx_bd;
+ rx_bd.phys = (u32)&rxframe;
+ rx_bd.cntrl = sizeof(rxframe);
+ /* Flush the last BD so DMA core could see the updates */
+ flush_cache((u32)&rx_bd, sizeof(rx_bd));
+
+ /* It is necessary to flush rxframe because if you don't do it
+ * then cache can contain uninitialized data */
+ flush_cache((u32)&rxframe, sizeof(rxframe));
+
+ /* Start the hardware */
+ temp = in_be32(&priv->dmarx->control);
+ temp |= XAXIDMA_CR_RUNSTOP_MASK;
+ out_be32(&priv->dmarx->control, temp);
+
+ /* Rx BD is ready - start */
+ out_be32(&priv->dmarx->tail, (u32)&rx_bd);
+
+ /* Enable TX */
+ out_be32(&regs->tc, XAE_TC_TX_MASK);
+ /* Enable RX */
+ out_be32(&regs->rcw1, XAE_RCW1_RX_MASK);
+
+ /* PHY setup */
+ if (!setup_phy(dev)) {
+ axiemac_halt(dev);
+ return -1;
+ }
+
+ debug("axiemac: Init complete\n");
+ return 0;
+}
+
+static int axiemac_send(struct eth_device *dev, volatile void *ptr, int len)
+{
+ struct axidma_priv *priv = dev->priv;
+ u32 timeout;
+
+ if (len > PKTSIZE_ALIGN)
+ len = PKTSIZE_ALIGN;
+
+ /* Flush packet to main memory to be trasfered by DMA */
+ flush_cache((u32)ptr, len);
+
+ /* Setup Tx BD */
+ memset(&tx_bd, 0, sizeof(tx_bd));
+ /* At the end of the ring, link the last BD back to the top */
+ tx_bd.next = (u32)&tx_bd;
+ tx_bd.phys = (u32)ptr;
+ /* Save len */
+ tx_bd.cntrl = len | XAXIDMA_BD_CTRL_TXSOF_MASK |
+ XAXIDMA_BD_CTRL_TXEOF_MASK;
+
+ /* Flush the last BD so DMA core could see the updates */
+ flush_cache((u32)&tx_bd, sizeof(tx_bd));
+
+ if (in_be32(&priv->dmatx->status) & XAXIDMA_HALTED_MASK) {
+ u32 temp;
+ out_be32(&priv->dmatx->current, (u32)&tx_bd);
+ /* Start the hardware */
+ temp = in_be32(&priv->dmatx->control);
+ temp |= XAXIDMA_CR_RUNSTOP_MASK;
+ out_be32(&priv->dmatx->control, temp);
+ }
+
+ /* Start transfer */
+ out_be32(&priv->dmatx->tail, (u32)&tx_bd);
+
+ /* Wait for transmission to complete */
+ debug("axiemac: Waiting for tx to be done\n");
+ timeout = 200;
+ while (timeout && (!in_be32(&priv->dmatx->status) &
+ (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK))) {
+ timeout--;
+ udelay(1);
+ }
+ if (!timeout) {
+ printf("%s: Timeout\n", __func__);
+ return 1;
+ }
+
+ debug("axiemac: Sending complete\n");
+ return 0;
+}
+
+static int isrxready(struct eth_device *dev)
+{
+ u32 status;
+ struct axidma_priv *priv = dev->priv;
+
+ /* Read pending interrupts */
+ status = in_be32(&priv->dmarx->status);
+
+ /* Acknowledge pending interrupts */
+ out_be32(&priv->dmarx->status, status & XAXIDMA_IRQ_ALL_MASK);
+
+ /*
+ * If Reception done interrupt is asserted, call RX call back function
+ * to handle the processed BDs and then raise the according flag.
+ */
+ if ((status & (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK)))
+ return 1;
+
+ return 0;
+}
+
+static int axiemac_recv(struct eth_device *dev)
+{
+ u32 length;
+ struct axidma_priv *priv = dev->priv;
+ u32 temp;
+
+ /* Wait for an incoming packet */
+ if (!isrxready(dev))
+ return 0;
+
+ debug("axiemac: RX data ready\n");
+
+ /* Disable IRQ for a moment till packet is handled */
+ temp = in_be32(&priv->dmarx->control);
+ temp &= ~XAXIDMA_IRQ_ALL_MASK;
+ out_be32(&priv->dmarx->control, temp);
+
+ length = rx_bd.app4 & 0xFFFF; /* max length mask */
+#ifdef DEBUG
+ print_buffer(&rxframe, &rxframe[0], 1, length, 16);
+#endif
+ /* Pass the received frame up for processing */
+ if (length)
+ NetReceive(rxframe, length);
+
+#ifdef DEBUG
+ /* It is useful to clear buffer to be sure that it is consistent */
+ memset(rxframe, 0, sizeof(rxframe));
+#endif
+ /* Setup RxBD */
+ /* Clear the whole buffer and setup it again - all flags are cleared */
+ memset(&rx_bd, 0, sizeof(rx_bd));
+ rx_bd.next = (u32)&rx_bd;
+ rx_bd.phys = (u32)&rxframe;
+ rx_bd.cntrl = sizeof(rxframe);
+
+ /* Write bd to HW */
+ flush_cache((u32)&rx_bd, sizeof(rx_bd));
+
+ /* It is necessary to flush rxframe because if you don't do it
+ * then cache will contain previous packet */
+ flush_cache((u32)&rxframe, sizeof(rxframe));
+
+ /* Rx BD is ready - start again */
+ out_be32(&priv->dmarx->tail, (u32)&rx_bd);
+
+ debug("axiemac: RX completed, framelength = %d\n", length);
+
+ return length;
+}
+
+static int axiemac_miiphy_read(const char *devname, uchar addr,
+ uchar reg, ushort *val)
+{
+ struct eth_device *dev = eth_get_dev();
+ u32 ret;
+
+ ret = phyread(dev, addr, reg, val);
+ debug("axiemac: Read MII 0x%x, 0x%x, 0x%x\n", addr, reg, *val);
+ return ret;
+}
+
+static int axiemac_miiphy_write(const char *devname, uchar addr,
+ uchar reg, ushort val)
+{
+ struct eth_device *dev = eth_get_dev();
+
+ debug("axiemac: Write MII 0x%x, 0x%x, 0x%x\n", addr, reg, val);
+ return phywrite(dev, addr, reg, val);
+}
+
+static int axiemac_bus_reset(struct mii_dev *bus)
+{
+ debug("axiemac: Bus reset\n");
+ return 0;
+}
+
+int xilinx_axiemac_initialize(bd_t *bis, unsigned long base_addr,
+ unsigned long dma_addr)
+{
+ struct eth_device *dev;
+ struct axidma_priv *priv;
+
+ dev = calloc(1, sizeof(struct eth_device));
+ if (dev == NULL)
+ return -1;
+
+ dev->priv = calloc(1, sizeof(struct axidma_priv));
+ if (dev->priv == NULL) {
+ free(dev);
+ return -1;
+ }
+ priv = dev->priv;
+
+ sprintf(dev->name, "aximac.%lx", base_addr);
+
+ dev->iobase = base_addr;
+ priv->dmatx = (struct axidma_reg *)dma_addr;
+ /* RX channel offset is 0x30 */
+ priv->dmarx = (struct axidma_reg *)(dma_addr + 0x30);
+ dev->init = axiemac_init;
+ dev->halt = axiemac_halt;
+ dev->send = axiemac_send;
+ dev->recv = axiemac_recv;
+ dev->write_hwaddr = axiemac_setup_mac;
+
+#ifdef CONFIG_PHY_ADDR
+ priv->phyaddr = CONFIG_PHY_ADDR;
+#else
+ priv->phyaddr = -1;
+#endif
+
+ eth_register(dev);
+
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
+ miiphy_register(dev->name, axiemac_miiphy_read, axiemac_miiphy_write);
+ priv->bus = miiphy_get_dev_by_name(dev->name);
+ priv->bus->reset = axiemac_bus_reset;
+#endif
+ return 1;
+}
diff --git a/include/netdev.h b/include/netdev.h
index 8b71011..f9bbe65 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -94,6 +94,8 @@ int smc911x_initialize(u8 dev_num, int base_addr);
int tsi108_eth_initialize(bd_t *bis);
int uec_standard_init(bd_t *bis);
int uli526x_initialize(bd_t *bis);
+int xilinx_axiemac_initialize(bd_t *bis, unsigned long base_addr,
+ unsigned long dma_addr);
int xilinx_emaclite_initialize(bd_t *bis, unsigned long base_addr,
int txpp, int rxpp);

--
1.5.5.6