--- /dev/null
+/*
+ * Dave Ethernet Controller driver
+ *
+ * Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <common.h>
+
+#ifndef CONFIG_DNET_AUTONEG_TIMEOUT
+#define CONFIG_DNET_AUTONEG_TIMEOUT 5000000 /* default value */
+#endif
+
+#include <net.h>
+#include <malloc.h>
+#include <linux/mii.h>
+
+#include <miiphy.h>
+#include <asm/io.h>
+
+#include "dnet.h"
+
+struct dnet_device {
+ struct dnet_registers *regs;
+ const struct device *dev;
+ struct eth_device netdev;
+ unsigned short phy_addr;
+};
+
+/* get struct dnet_device from given struct netdev */
+#define to_dnet(_nd) container_of(_nd, struct dnet_device, netdev)
+
+/* function for reading internal MAC register */
+u16 dnet_readw_mac(struct dnet_device *dnet, u16 reg)
+{
+ u16 data_read;
+
+ /* issue a read */
+ writel(reg, &dnet->regs->MACREG_ADDR);
+
+ /* since a read/write op to the MAC is very slow,
+ * we must wait before reading the data */
+ udelay(1);
+
+ /* read data read from the MAC register */
+ data_read = readl(&dnet->regs->MACREG_DATA);
+
+ /* all done */
+ return data_read;
+}
+
+/* function for writing internal MAC register */
+void dnet_writew_mac(struct dnet_device *dnet, u16 reg, u16 val)
+{
+ /* load data to write */
+ writel(val, &dnet->regs->MACREG_DATA);
+
+ /* issue a write */
+ writel(reg | DNET_INTERNAL_WRITE, &dnet->regs->MACREG_ADDR);
+
+ /* since a read/write op to the MAC is very slow,
+ * we must wait before exiting */
+ udelay(1);
+}
+
+static void dnet_mdio_write(struct dnet_device *dnet, u8 reg, u16 value)
+{
+ u16 tmp;
+
+ debug(DRIVERNAME "dnet_mdio_write %02x:%02x <- %04x\n",
+ dnet->phy_addr, reg, value);
+
+ while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
+ DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ ;
+
+ /* prepare for a write operation */
+ tmp = (1 << 13);
+
+ /* only 5 bits allowed for register offset */
+ reg &= 0x1f;
+
+ /* prepare reg_value for a write */
+ tmp |= (dnet->phy_addr << 8);
+ tmp |= reg;
+
+ /* write data to write first */
+ dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_DAT_REG, value);
+
+ /* write control word */
+ dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG, tmp);
+
+ while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
+ DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ ;
+}
+
+static u16 dnet_mdio_read(struct dnet_device *dnet, u8 reg)
+{
+ u16 value;
+
+ while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
+ DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ ;
+
+ /* only 5 bits allowed for register offset*/
+ reg &= 0x1f;
+
+ /* prepare reg_value for a read */
+ value = (dnet->phy_addr << 8);
+ value |= reg;
+
+ /* write control word */
+ dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG, value);
+
+ /* wait for end of transfer */
+ while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
+ DNET_INTERNAL_GMII_MNG_CMD_FIN))
+ ;
+
+ value = dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_DAT_REG);
+
+ debug(DRIVERNAME "dnet_mdio_read %02x:%02x <- %04x\n",
+ dnet->phy_addr, reg, value);
+
+ return value;
+}
+
+static int dnet_send(struct eth_device *netdev, volatile void *packet,
+ int length)
+{
+ struct dnet_device *dnet = to_dnet(netdev);
+ int i, len, wrsz;
+ unsigned int *bufp;
+ unsigned int tx_cmd;
+
+ debug(DRIVERNAME "[%s] Sending %u bytes\n", __func__, length);
+
+ /* frame size (words) */
+ len = (length + 3) >> 2;
+
+ bufp = (unsigned int *) (((u32)packet) & 0xFFFFFFFC);
+ wrsz = (u32)length + 3;
+ wrsz += ((u32)packet) & 0x3;
+ wrsz >>= 2;
+ tx_cmd = ((((unsigned int)(packet)) & 0x03) << 16) | (u32)length;
+
+ /* check if there is enough room for the current frame */
+ if (wrsz < (DNET_FIFO_SIZE - readl(&dnet->regs->TX_FIFO_WCNT))) {
+ for (i = 0; i < wrsz; i++)
+ writel(*bufp++, &dnet->regs->TX_DATA_FIFO);
+ /*
+ * inform MAC that a packet's written and ready
+ * to be shipped out
+ */
+ writel(tx_cmd, &dnet->regs->TX_LEN_FIFO);
+ } else {
+ printf(DRIVERNAME "No free space (actual %d, required %d "
+ "(words))\n", DNET_FIFO_SIZE -
+ readl(&dnet->regs->TX_FIFO_WCNT), wrsz);
+ }
+
+ /* No one cares anyway */
+ return 0;
+}
+
+
+static int dnet_recv(struct eth_device *netdev)
+{
+ struct dnet_device *dnet = to_dnet(netdev);
+ unsigned int *data_ptr;
+ int pkt_len, poll, i;
+ u32 cmd_word;
+
+ debug("Waiting for pkt (polling)\n");
+ poll = 50;
+ while ((readl(&dnet->regs->RX_FIFO_WCNT) >> 16) == 0) {
+ udelay(10); /* wait 10 usec */
+ if (--poll == 0)
+ return 0; /* no pkt available */
+ }
+
+ cmd_word = readl(&dnet->regs->RX_LEN_FIFO);
+ pkt_len = cmd_word & 0xFFFF;
+
+ debug("Got pkt with size %d bytes\n", pkt_len);
+
+ if (cmd_word & 0xDF180000)
+ printf("%s packet receive error %x\n", __func__, cmd_word);
+
+ data_ptr = (unsigned int *) NetRxPackets[0];
+
+ for (i = 0; i < (pkt_len + 3) >> 2; i++)
+ *data_ptr++ = readl(&dnet->regs->RX_DATA_FIFO);
+
+ NetReceive(NetRxPackets[0], pkt_len + 5); /* ok + 5 ?? */
+
+ return 0;
+}
+
+static void dnet_set_hwaddr(struct eth_device *netdev)
+{
+ struct dnet_device *dnet = to_dnet(netdev);
+ u16 tmp;
+
+ tmp = cpu_to_be16(*((u16 *)netdev->enetaddr));
+ dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_0_REG, tmp);
+ tmp = cpu_to_be16(*((u16 *)(netdev->enetaddr + 2)));
+ dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_1_REG, tmp);
+ tmp = cpu_to_be16(*((u16 *)(netdev->enetaddr + 4)));
+ dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_2_REG, tmp);
+}
+
+static void dnet_phy_reset(struct dnet_device *dnet)
+{
+ struct eth_device *netdev = &dnet->netdev;
+ int i;
+ u16 status, adv;
+
+ adv = ADVERTISE_CSMA | ADVERTISE_ALL;
+ dnet_mdio_write(dnet, MII_ADVERTISE, adv);
+ printf("%s: Starting autonegotiation...\n", netdev->name);
+ dnet_mdio_write(dnet, MII_BMCR, (BMCR_ANENABLE
+ | BMCR_ANRESTART));
+
+ for (i = 0; i < CONFIG_DNET_AUTONEG_TIMEOUT / 100; i++) {
+ status = dnet_mdio_read(dnet, MII_BMSR);
+ if (status & BMSR_ANEGCOMPLETE)
+ break;
+ udelay(100);
+ }
+
+ if (status & BMSR_ANEGCOMPLETE)
+ printf("%s: Autonegotiation complete\n", netdev->name);
+ else
+ printf("%s: Autonegotiation timed out (status=0x%04x)\n",
+ netdev->name, status);
+}
+
+static int dnet_phy_init(struct dnet_device *dnet)
+{
+ struct eth_device *netdev = &dnet->netdev;
+ u16 phy_id, status, adv, lpa;
+ int media, speed, duplex;
+ int i;
+ u32 ctl_reg;
+
+ /* Find a PHY */
+ for (i = 0; i < 32; i++) {
+ dnet->phy_addr = i;
+ phy_id = dnet_mdio_read(dnet, MII_PHYSID1);
+ if (phy_id != 0xffff) {
+ /* ok we found it */
+ printf("Found PHY at address %d PHYID (%04x:%04x)\n",
+ i, phy_id,
+ dnet_mdio_read(dnet, MII_PHYSID2));
+ break;
+ }
+ }
+
+ /* Check if the PHY is up to snuff... */
+ phy_id = dnet_mdio_read(dnet, MII_PHYSID1);
+ if (phy_id == 0xffff) {
+ printf("%s: No PHY present\n", netdev->name);
+ return -1;
+ }
+
+ status = dnet_mdio_read(dnet, MII_BMSR);
+ if (!(status & BMSR_LSTATUS)) {
+ /* Try to re-negotiate if we don't have link already. */
+ dnet_phy_reset(dnet);
+
+ for (i = 0; i < CONFIG_DNET_AUTONEG_TIMEOUT / 100; i++) {
+ status = dnet_mdio_read(dnet, MII_BMSR);
+ if (status & BMSR_LSTATUS)
+ break;
+ udelay(100);
+ }
+ }
+
+ if (!(status & BMSR_LSTATUS)) {
+ printf("%s: link down (status: 0x%04x)\n",
+ netdev->name, status);
+ return -1;
+ } else {
+ adv = dnet_mdio_read(dnet, MII_ADVERTISE);
+ lpa = dnet_mdio_read(dnet, MII_LPA);
+ media = mii_nway_result(lpa & adv);
+ speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
+ ? 1 : 0);
+ duplex = (media & ADVERTISE_FULL) ? 1 : 0;
+ /* 1000BaseT ethernet is not supported */
+ printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
+ netdev->name,
+ speed ? "100" : "10",
+ duplex ? "full" : "half",
+ lpa);
+
+ ctl_reg = dnet_readw_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG);
+
+ if (duplex)
+ ctl_reg &= ~(DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP);
+ else
+ ctl_reg |= DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP;
+
+ dnet_writew_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG, ctl_reg);
+
+ return 0;
+ }
+}
+
+static int dnet_init(struct eth_device *netdev, bd_t *bd)
+{
+ struct dnet_device *dnet = to_dnet(netdev);
+ u32 config;
+
+ /*
+ * dnet_halt should have been called at some point before now,
+ * so we'll assume the controller is idle.
+ */
+
+ /* set hardware address */
+ dnet_set_hwaddr(netdev);
+
+ if (dnet_phy_init(dnet) < 0)
+ return -1;
+
+ /* flush rx/tx fifos */
+ writel(DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH,
+ &dnet->regs->SYS_CTL);
+ udelay(1000);
+ writel(0, &dnet->regs->SYS_CTL);
+
+ config = dnet_readw_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG);
+
+ config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE |
+ DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST |
+ DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL |
+ DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS;
+
+ dnet_writew_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG, config);
+
+ /* Enable TX and RX */
+ dnet_writew_mac(dnet, DNET_INTERNAL_MODE_REG,
+ DNET_INTERNAL_MODE_RXEN | DNET_INTERNAL_MODE_TXEN);
+
+ return 0;
+}
+
+static void dnet_halt(struct eth_device *netdev)
+{
+ struct dnet_device *dnet = to_dnet(netdev);
+
+ /* Disable TX and RX */
+ dnet_writew_mac(dnet, DNET_INTERNAL_MODE_REG, 0);
+}
+
+int dnet_eth_initialize(int id, void *regs, unsigned int phy_addr)
+{
+ struct dnet_device *dnet;
+ struct eth_device *netdev;
+ unsigned int dev_capa;
+
+ dnet = malloc(sizeof(struct dnet_device));
+ if (!dnet) {
+ printf("Error: Failed to allocate memory for DNET%d\n", id);
+ return -1;
+ }
+ memset(dnet, 0, sizeof(struct dnet_device));
+
+ netdev = &dnet->netdev;
+
+ dnet->regs = (struct dnet_registers *)regs;
+ dnet->phy_addr = phy_addr;
+
+ sprintf(netdev->name, "dnet%d", id);
+ netdev->init = dnet_init;
+ netdev->halt = dnet_halt;
+ netdev->send = dnet_send;
+ netdev->recv = dnet_recv;
+
+ dev_capa = readl(&dnet->regs->VERCAPS) & 0xFFFF;
+ debug("%s: has %smdio, %sirq, %sgigabit, %sdma \n", netdev->name,
+ (dev_capa & DNET_HAS_MDIO) ? "" : "no ",
+ (dev_capa & DNET_HAS_IRQ) ? "" : "no ",
+ (dev_capa & DNET_HAS_GIGABIT) ? "" : "no ",
+ (dev_capa & DNET_HAS_DMA) ? "" : "no ");
+
+ eth_register(netdev);
+
+ return 0;
+}
+
--- /dev/null
+/*
+ * Dave Ethernet Controller driver
+ *
+ * Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_DNET_H__
+#define __DRIVERS_DNET_H__
+
+#define DRIVERNAME "dnet"
+
+struct dnet_registers {
+ /* ALL DNET FIFO REGISTERS */
+ u32 RX_LEN_FIFO;
+ u32 RX_DATA_FIFO;
+ u32 TX_LEN_FIFO;
+ u32 TX_DATA_FIFO;
+ u32 pad1[0x3c];
+ /* ALL DNET CONTROL/STATUS REGISTERS */
+ u32 VERCAPS;
+ u32 INTR_SRC;
+ u32 INTR_ENB;
+ u32 RX_STATUS;
+ u32 TX_STATUS;
+ u32 RX_FRAMES_CNT;
+ u32 TX_FRAMES_CNT;
+ u32 RX_FIFO_TH;
+ u32 TX_FIFO_TH;
+ u32 SYS_CTL;
+ u32 PAUSE_TMR;
+ u32 RX_FIFO_WCNT;
+ u32 TX_FIFO_WCNT;
+ u32 pad2[0x33];
+ /* ALL DNET MAC REGISTERS */
+ u32 MACREG_DATA; /* Mac-Reg Data */
+ u32 MACREG_ADDR; /* Mac-Reg Addr */
+ u32 pad3[0x3e];
+ /* ALL DNET RX STATISTICS COUNTERS */
+ u32 RX_PKT_IGNR_CNT;
+ u32 RX_LEN_CHK_ERR_CNT;
+ u32 RX_LNG_FRM_CNT;
+ u32 RX_SHRT_FRM_CNT;
+ u32 RX_IPG_VIOL_CNT;
+ u32 RX_CRC_ERR_CNT;
+ u32 RX_OK_PKT_CNT;
+ u32 RX_CTL_FRM_CNT;
+ u32 RX_PAUSE_FRM_CNT;
+ u32 RX_MULTICAST_CNT;
+ u32 RX_BROADCAST_CNT;
+ u32 RX_VLAN_TAG_CNT;
+ u32 RX_PRE_SHRINK_CNT;
+ u32 RX_DRIB_NIB_CNT;
+ u32 RX_UNSUP_OPCD_CNT;
+ u32 RX_BYTE_CNT;
+ u32 pad4[0x30];
+ /* DNET TX STATISTICS COUNTERS */
+ u32 TX_UNICAST_CNT;
+ u32 TX_PAUSE_FRM_CNT;
+ u32 TX_MULTICAST_CNT;
+ u32 TX_BRDCAST_CNT;
+ u32 TX_VLAN_TAG_CNT;
+ u32 TX_BAD_FCS_CNT;
+ u32 TX_JUMBO_CNT;
+ u32 TX_BYTE_CNT;
+};
+
+/* SOME INTERNAL MAC-CORE REGISTER */
+#define DNET_INTERNAL_MODE_REG 0x0
+#define DNET_INTERNAL_RXTX_CONTROL_REG 0x2
+#define DNET_INTERNAL_MAX_PKT_SIZE_REG 0x4
+#define DNET_INTERNAL_IGP_REG 0x8
+#define DNET_INTERNAL_MAC_ADDR_0_REG 0xa
+#define DNET_INTERNAL_MAC_ADDR_1_REG 0xc
+#define DNET_INTERNAL_MAC_ADDR_2_REG 0xe
+#define DNET_INTERNAL_TX_RX_STS_REG 0x12
+#define DNET_INTERNAL_GMII_MNG_CTL_REG 0x14
+#define DNET_INTERNAL_GMII_MNG_DAT_REG 0x16
+
+#define DNET_INTERNAL_GMII_MNG_CMD_FIN (1 << 14)
+
+#define DNET_INTERNAL_WRITE (1 << 31)
+
+/* MAC-CORE REGISTER FIELDS */
+
+/* MAC-CORE MODE REGISTER FIELDS */
+#define DNET_INTERNAL_MODE_GBITEN (1 << 0)
+#define DNET_INTERNAL_MODE_FCEN (1 << 1)
+#define DNET_INTERNAL_MODE_RXEN (1 << 2)
+#define DNET_INTERNAL_MODE_TXEN (1 << 3)
+
+/* MAC-CORE RXTX CONTROL REGISTER FIELDS */
+#define DNET_INTERNAL_RXTX_CONTROL_RXSHORTFRAME (1 << 8)
+#define DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST (1 << 7)
+#define DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST (1 << 4)
+#define DNET_INTERNAL_RXTX_CONTROL_RXPAUSE (1 << 3)
+#define DNET_INTERNAL_RXTX_CONTROL_DISTXFCS (1 << 2)
+#define DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS (1 << 1)
+#define DNET_INTERNAL_RXTX_CONTROL_ENPROMISC (1 << 0)
+#define DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL (1 << 6)
+#define DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP (1 << 5)
+
+/* SYSTEM CONTROL REGISTER FIELDS */
+#define DNET_SYS_CTL_IGNORENEXTPKT (1 << 0)
+#define DNET_SYS_CTL_SENDPAUSE (1 << 2)
+#define DNET_SYS_CTL_RXFIFOFLUSH (1 << 3)
+#define DNET_SYS_CTL_TXFIFOFLUSH (1 << 4)
+
+/* TX STATUS REGISTER FIELDS */
+#define DNET_TX_STATUS_FIFO_ALMOST_EMPTY (1 << 2)
+#define DNET_TX_STATUS_FIFO_ALMOST_FULL (1 << 1)
+
+/* INTERRUPT SOURCE REGISTER FIELDS */
+#define DNET_INTR_SRC_TX_PKTSENT (1 << 0)
+#define DNET_INTR_SRC_TX_FIFOAF (1 << 1)
+#define DNET_INTR_SRC_TX_FIFOAE (1 << 2)
+#define DNET_INTR_SRC_TX_DISCFRM (1 << 3)
+#define DNET_INTR_SRC_TX_FIFOFULL (1 << 4)
+#define DNET_INTR_SRC_RX_CMDFIFOAF (1 << 8)
+#define DNET_INTR_SRC_RX_CMDFIFOFF (1 << 9)
+#define DNET_INTR_SRC_RX_DATAFIFOFF (1 << 10)
+#define DNET_INTR_SRC_TX_SUMMARY (1 << 16)
+#define DNET_INTR_SRC_RX_SUMMARY (1 << 17)
+#define DNET_INTR_SRC_PHY (1 << 19)
+
+/* INTERRUPT ENABLE REGISTER FIELDS */
+#define DNET_INTR_ENB_TX_PKTSENT (1 << 0)
+#define DNET_INTR_ENB_TX_FIFOAF (1 << 1)
+#define DNET_INTR_ENB_TX_FIFOAE (1 << 2)
+#define DNET_INTR_ENB_TX_DISCFRM (1 << 3)
+#define DNET_INTR_ENB_TX_FIFOFULL (1 << 4)
+#define DNET_INTR_ENB_RX_PKTRDY (1 << 8)
+#define DNET_INTR_ENB_RX_FIFOAF (1 << 9)
+#define DNET_INTR_ENB_RX_FIFOERR (1 << 10)
+#define DNET_INTR_ENB_RX_ERROR (1 << 11)
+#define DNET_INTR_ENB_RX_FIFOFULL (1 << 12)
+#define DNET_INTR_ENB_RX_FIFOAE (1 << 13)
+#define DNET_INTR_ENB_TX_SUMMARY (1 << 16)
+#define DNET_INTR_ENB_RX_SUMMARY (1 << 17)
+#define DNET_INTR_ENB_GLOBAL_ENABLE (1 << 18)
+
+/*
+ * Capabilities. Used by the driver to know the capabilities that
+ * the ethernet controller inside the FPGA have.
+ */
+
+#define DNET_HAS_MDIO (1 << 0)
+#define DNET_HAS_IRQ (1 << 1)
+#define DNET_HAS_GIGABIT (1 << 2)
+#define DNET_HAS_DMA (1 << 3)
+
+#define DNET_HAS_MII (1 << 4) /* or GMII */
+#define DNET_HAS_RMII (1 << 5) /* or RGMII */
+
+#define DNET_CAPS_MASK 0xFFFF
+
+#define DNET_FIFO_SIZE 2048 /* 2K x 32 bit */
+#define DNET_FIFO_TX_DATA_AF_TH (DNET_FIFO_SIZE - 384) /* 384 = 1536 / 4 */
+#define DNET_FIFO_TX_DATA_AE_TH (384)
+
+#define DNET_FIFO_RX_CMD_AF_TH (1 << 16) /* just one frame inside the FIFO */
+
+#endif
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