--- /dev/null
+/*
+ * Microchip ENC28J60 ethernet driver (MAC + PHY)
+ *
+ * Copyright (C) 2007 Eurek srl
+ * Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
+ * based on enc28j60.c written by David Anders for 2.4 kernel version
+ *
+ * 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.
+ *
+ * $Id: enc28j60.c,v 1.22 2007/12/20 10:47:01 claudio Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+
+#include "enc28j60_hw.h"
+
+#define DRV_NAME "enc28j60"
+#define DRV_VERSION "1.01"
+
+#define SPI_OPLEN 1
+
+#define ENC28J60_MSG_DEFAULT \
+ (NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK)
+
+/* Buffer size required for the largest SPI transfer (i.e., reading a
+ * frame). */
+#define SPI_TRANSFER_BUF_LEN (4 + MAX_FRAMELEN)
+
+#define TX_TIMEOUT (4 * HZ)
+
+/* Max TX retries in case of collision as suggested by errata datasheet */
+#define MAX_TX_RETRYCOUNT 16
+
+enum {
+ RXFILTER_NORMAL,
+ RXFILTER_MULTI,
+ RXFILTER_PROMISC
+};
+
+/* Driver local data */
+struct enc28j60_net {
+ struct net_device *netdev;
+ struct spi_device *spi;
+ struct mutex lock;
+ struct sk_buff *tx_skb;
+ struct work_struct tx_work;
+ struct work_struct irq_work;
+ struct work_struct setrx_work;
+ struct work_struct restart_work;
+ u8 bank; /* current register bank selected */
+ u16 next_pk_ptr; /* next packet pointer within FIFO */
+ u16 max_pk_counter; /* statistics: max packet counter */
+ u16 tx_retry_count;
+ bool hw_enable;
+ bool full_duplex;
+ int rxfilter;
+ u32 msg_enable;
+ u8 spi_transfer_buf[SPI_TRANSFER_BUF_LEN];
+};
+
+/* use ethtool to change the level for any given device */
+static struct {
+ u32 msg_enable;
+} debug = { -1 };
+
+/*
+ * SPI read buffer
+ * wait for the SPI transfer and copy received data to destination
+ */
+static int
+spi_read_buf(struct enc28j60_net *priv, int len, u8 *data)
+{
+ u8 *rx_buf = priv->spi_transfer_buf + 4;
+ u8 *tx_buf = priv->spi_transfer_buf;
+ struct spi_transfer t = {
+ .tx_buf = tx_buf,
+ .rx_buf = rx_buf,
+ .len = SPI_OPLEN + len,
+ };
+ struct spi_message msg;
+ int ret;
+
+ tx_buf[0] = ENC28J60_READ_BUF_MEM;
+ tx_buf[1] = tx_buf[2] = tx_buf[3] = 0; /* don't care */
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&t, &msg);
+ ret = spi_sync(priv->spi, &msg);
+ if (ret == 0) {
+ memcpy(data, &rx_buf[SPI_OPLEN], len);
+ ret = msg.status;
+ }
+ if (ret && netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
+ __FUNCTION__, ret);
+
+ return ret;
+}
+
+/*
+ * SPI write buffer
+ */
+static int spi_write_buf(struct enc28j60_net *priv, int len,
+ const u8 *data)
+{
+ int ret;
+
+ if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0)
+ ret = -EINVAL;
+ else {
+ priv->spi_transfer_buf[0] = ENC28J60_WRITE_BUF_MEM;
+ memcpy(&priv->spi_transfer_buf[1], data, len);
+ ret = spi_write(priv->spi, priv->spi_transfer_buf, len + 1);
+ if (ret && netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
+ __FUNCTION__, ret);
+ }
+ return ret;
+}
+
+/*
+ * basic SPI read operation
+ */
+static u8 spi_read_op(struct enc28j60_net *priv, u8 op,
+ u8 addr)
+{
+ u8 tx_buf[2];
+ u8 rx_buf[4];
+ u8 val = 0;
+ int ret;
+ int slen = SPI_OPLEN;
+
+ /* do dummy read if needed */
+ if (addr & SPRD_MASK)
+ slen++;
+
+ tx_buf[0] = op | (addr & ADDR_MASK);
+ ret = spi_write_then_read(priv->spi, tx_buf, 1, rx_buf, slen);
+ if (ret)
+ printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
+ __FUNCTION__, ret);
+ else
+ val = rx_buf[slen - 1];
+
+ return val;
+}
+
+/*
+ * basic SPI write operation
+ */
+static int spi_write_op(struct enc28j60_net *priv, u8 op,
+ u8 addr, u8 val)
+{
+ int ret;
+
+ priv->spi_transfer_buf[0] = op | (addr & ADDR_MASK);
+ priv->spi_transfer_buf[1] = val;
+ ret = spi_write(priv->spi, priv->spi_transfer_buf, 2);
+ if (ret && netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
+ __FUNCTION__, ret);
+ return ret;
+}
+
+static void enc28j60_soft_reset(struct enc28j60_net *priv)
+{
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __FUNCTION__);
+
+ spi_write_op(priv, ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET);
+ /* Errata workaround #1, CLKRDY check is unreliable,
+ * delay at least 1 mS instead */
+ udelay(2000);
+}
+
+/*
+ * select the current register bank if necessary
+ */
+static void enc28j60_set_bank(struct enc28j60_net *priv, u8 addr)
+{
+ if ((addr & BANK_MASK) != priv->bank) {
+ u8 b = (addr & BANK_MASK) >> 5;
+
+ if (b != (ECON1_BSEL1 | ECON1_BSEL0))
+ spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1,
+ ECON1_BSEL1 | ECON1_BSEL0);
+ if (b != 0)
+ spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1, b);
+ priv->bank = (addr & BANK_MASK);
+ }
+}
+
+/*
+ * Register access routines through the SPI bus.
+ * Every register access comes in two flavours:
+ * - nolock_xxx: caller needs to invoke mutex_lock, usually to access
+ * atomically more than one register
+ * - locked_xxx: caller doesn't need to invoke mutex_lock, single access
+ *
+ * Some registers can be accessed through the bit field clear and
+ * bit field set to avoid a read modify write cycle.
+ */
+
+/*
+ * Register bit field Set
+ */
+static void nolock_reg_bfset(struct enc28j60_net *priv,
+ u8 addr, u8 mask)
+{
+ enc28j60_set_bank(priv, addr);
+ spi_write_op(priv, ENC28J60_BIT_FIELD_SET, addr, mask);
+}
+
+static void locked_reg_bfset(struct enc28j60_net *priv,
+ u8 addr, u8 mask)
+{
+ mutex_lock(&priv->lock);
+ nolock_reg_bfset(priv, addr, mask);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Register bit field Clear
+ */
+static void nolock_reg_bfclr(struct enc28j60_net *priv,
+ u8 addr, u8 mask)
+{
+ enc28j60_set_bank(priv, addr);
+ spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, addr, mask);
+}
+
+static void locked_reg_bfclr(struct enc28j60_net *priv,
+ u8 addr, u8 mask)
+{
+ mutex_lock(&priv->lock);
+ nolock_reg_bfclr(priv, addr, mask);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Register byte read
+ */
+static int nolock_regb_read(struct enc28j60_net *priv,
+ u8 address)
+{
+ enc28j60_set_bank(priv, address);
+ return spi_read_op(priv, ENC28J60_READ_CTRL_REG, address);
+}
+
+static int locked_regb_read(struct enc28j60_net *priv,
+ u8 address)
+{
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = nolock_regb_read(priv, address);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+/*
+ * Register word read
+ */
+static int nolock_regw_read(struct enc28j60_net *priv,
+ u8 address)
+{
+ int rl, rh;
+
+ enc28j60_set_bank(priv, address);
+ rl = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address);
+ rh = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address + 1);
+
+ return (rh << 8) | rl;
+}
+
+static int locked_regw_read(struct enc28j60_net *priv,
+ u8 address)
+{
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = nolock_regw_read(priv, address);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+/*
+ * Register byte write
+ */
+static void nolock_regb_write(struct enc28j60_net *priv,
+ u8 address, u8 data)
+{
+ enc28j60_set_bank(priv, address);
+ spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, data);
+}
+
+static void locked_regb_write(struct enc28j60_net *priv,
+ u8 address, u8 data)
+{
+ mutex_lock(&priv->lock);
+ nolock_regb_write(priv, address, data);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Register word write
+ */
+static void nolock_regw_write(struct enc28j60_net *priv,
+ u8 address, u16 data)
+{
+ enc28j60_set_bank(priv, address);
+ spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, (u8) data);
+ spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address + 1,
+ (u8) (data >> 8));
+}
+
+static void locked_regw_write(struct enc28j60_net *priv,
+ u8 address, u16 data)
+{
+ mutex_lock(&priv->lock);
+ nolock_regw_write(priv, address, data);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Buffer memory read
+ * Select the starting address and execute a SPI buffer read
+ */
+static void enc28j60_mem_read(struct enc28j60_net *priv,
+ u16 addr, int len, u8 *data)
+{
+ mutex_lock(&priv->lock);
+ nolock_regw_write(priv, ERDPTL, addr);
+#ifdef CONFIG_ENC28J60_WRITEVERIFY
+ if (netif_msg_drv(priv)) {
+ u16 reg;
+ reg = nolock_regw_read(priv, ERDPTL);
+ if (reg != addr)
+ printk(KERN_DEBUG DRV_NAME ": %s() error writing ERDPT "
+ "(0x%04x - 0x%04x)\n", __FUNCTION__, reg, addr);
+ }
+#endif
+ spi_read_buf(priv, len, data);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Write packet to enc28j60 TX buffer memory
+ */
+static void
+enc28j60_packet_write(struct enc28j60_net *priv, int len, const u8 *data)
+{
+ mutex_lock(&priv->lock);
+ /* Set the write pointer to start of transmit buffer area */
+ nolock_regw_write(priv, EWRPTL, TXSTART_INIT);
+#ifdef CONFIG_ENC28J60_WRITEVERIFY
+ if (netif_msg_drv(priv)) {
+ u16 reg;
+ reg = nolock_regw_read(priv, EWRPTL);
+ if (reg != TXSTART_INIT)
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() ERWPT:0x%04x != 0x%04x\n",
+ __FUNCTION__, reg, TXSTART_INIT);
+ }
+#endif
+ /* Set the TXND pointer to correspond to the packet size given */
+ nolock_regw_write(priv, ETXNDL, TXSTART_INIT + len);
+ /* write per-packet control byte */
+ spi_write_op(priv, ENC28J60_WRITE_BUF_MEM, 0, 0x00);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() after control byte ERWPT:0x%04x\n",
+ __FUNCTION__, nolock_regw_read(priv, EWRPTL));
+ /* copy the packet into the transmit buffer */
+ spi_write_buf(priv, len, data);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() after write packet ERWPT:0x%04x, len=%d\n",
+ __FUNCTION__, nolock_regw_read(priv, EWRPTL), len);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Wait until the PHY operation is complete.
+ */
+static int wait_phy_ready(struct enc28j60_net *priv)
+{
+ unsigned long timeout = jiffies + 20 * HZ / 1000;
+ int ret = 1;
+
+ /* 20 msec timeout read */
+ while (nolock_regb_read(priv, MISTAT) & MISTAT_BUSY) {
+ if (time_after(jiffies, timeout)) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": PHY ready timeout!\n");
+ ret = 0;
+ break;
+ }
+ cpu_relax();
+ }
+ return ret;
+}
+
+/*
+ * PHY register read
+ * PHY registers are not accessed directly, but through the MII
+ */
+static u16 enc28j60_phy_read(struct enc28j60_net *priv, u8 address)
+{
+ u16 ret;
+
+ mutex_lock(&priv->lock);
+ /* set the PHY register address */
+ nolock_regb_write(priv, MIREGADR, address);
+ /* start the register read operation */
+ nolock_regb_write(priv, MICMD, MICMD_MIIRD);
+ /* wait until the PHY read completes */
+ wait_phy_ready(priv);
+ /* quit reading */
+ nolock_regb_write(priv, MICMD, 0x00);
+ /* return the data */
+ ret = nolock_regw_read(priv, MIRDL);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int enc28j60_phy_write(struct enc28j60_net *priv, u8 address, u16 data)
+{
+ int ret;
+
+ mutex_lock(&priv->lock);
+ /* set the PHY register address */
+ nolock_regb_write(priv, MIREGADR, address);
+ /* write the PHY data */
+ nolock_regw_write(priv, MIWRL, data);
+ /* wait until the PHY write completes and return */
+ ret = wait_phy_ready(priv);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+/*
+ * Program the hardware MAC address from dev->dev_addr.
+ */
+static int enc28j60_set_hw_macaddr(struct net_device *ndev)
+{
+ int ret;
+ struct enc28j60_net *priv = netdev_priv(ndev);
+
+ mutex_lock(&priv->lock);
+ if (!priv->hw_enable) {
+ if (netif_msg_drv(priv)) {
+ DECLARE_MAC_BUF(mac);
+ printk(KERN_INFO DRV_NAME
+ ": %s: Setting MAC address to %s\n",
+ ndev->name, print_mac(mac, ndev->dev_addr));
+ }
+ /* NOTE: MAC address in ENC28J60 is byte-backward */
+ nolock_regb_write(priv, MAADR5, ndev->dev_addr[0]);
+ nolock_regb_write(priv, MAADR4, ndev->dev_addr[1]);
+ nolock_regb_write(priv, MAADR3, ndev->dev_addr[2]);
+ nolock_regb_write(priv, MAADR2, ndev->dev_addr[3]);
+ nolock_regb_write(priv, MAADR1, ndev->dev_addr[4]);
+ nolock_regb_write(priv, MAADR0, ndev->dev_addr[5]);
+ ret = 0;
+ } else {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() Hardware must be disabled to set "
+ "Mac address\n", __FUNCTION__);
+ ret = -EBUSY;
+ }
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+/*
+ * Store the new hardware address in dev->dev_addr, and update the MAC.
+ */
+static int enc28j60_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *address = addr;
+
+ if (netif_running(dev))
+ return -EBUSY;
+ if (!is_valid_ether_addr(address->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
+ return enc28j60_set_hw_macaddr(dev);
+}
+
+/*
+ * Debug routine to dump useful register contents
+ */
+static void enc28j60_dump_regs(struct enc28j60_net *priv, const char *msg)
+{
+ mutex_lock(&priv->lock);
+ printk(KERN_DEBUG DRV_NAME " %s\n"
+ "HwRevID: 0x%02x\n"
+ "Cntrl: ECON1 ECON2 ESTAT EIR EIE\n"
+ " 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n"
+ "MAC : MACON1 MACON3 MACON4\n"
+ " 0x%02x 0x%02x 0x%02x\n"
+ "Rx : ERXST ERXND ERXWRPT ERXRDPT ERXFCON EPKTCNT MAMXFL\n"
+ " 0x%04x 0x%04x 0x%04x 0x%04x "
+ "0x%02x 0x%02x 0x%04x\n"
+ "Tx : ETXST ETXND MACLCON1 MACLCON2 MAPHSUP\n"
+ " 0x%04x 0x%04x 0x%02x 0x%02x 0x%02x\n",
+ msg, nolock_regb_read(priv, EREVID),
+ nolock_regb_read(priv, ECON1), nolock_regb_read(priv, ECON2),
+ nolock_regb_read(priv, ESTAT), nolock_regb_read(priv, EIR),
+ nolock_regb_read(priv, EIE), nolock_regb_read(priv, MACON1),
+ nolock_regb_read(priv, MACON3), nolock_regb_read(priv, MACON4),
+ nolock_regw_read(priv, ERXSTL), nolock_regw_read(priv, ERXNDL),
+ nolock_regw_read(priv, ERXWRPTL),
+ nolock_regw_read(priv, ERXRDPTL),
+ nolock_regb_read(priv, ERXFCON),
+ nolock_regb_read(priv, EPKTCNT),
+ nolock_regw_read(priv, MAMXFLL), nolock_regw_read(priv, ETXSTL),
+ nolock_regw_read(priv, ETXNDL),
+ nolock_regb_read(priv, MACLCON1),
+ nolock_regb_read(priv, MACLCON2),
+ nolock_regb_read(priv, MAPHSUP));
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * ERXRDPT need to be set always at odd addresses, refer to errata datasheet
+ */
+static u16 erxrdpt_workaround(u16 next_packet_ptr, u16 start, u16 end)
+{
+ u16 erxrdpt;
+
+ if ((next_packet_ptr - 1 < start) || (next_packet_ptr - 1 > end))
+ erxrdpt = end;
+ else
+ erxrdpt = next_packet_ptr - 1;
+
+ return erxrdpt;
+}
+
+static void nolock_rxfifo_init(struct enc28j60_net *priv, u16 start, u16 end)
+{
+ u16 erxrdpt;
+
+ if (start > 0x1FFF || end > 0x1FFF || start > end) {
+ if (netif_msg_drv(priv))
+ printk(KERN_ERR DRV_NAME ": %s(%d, %d) RXFIFO "
+ "bad parameters!\n", __FUNCTION__, start, end);
+ return;
+ }
+ /* set receive buffer start + end */
+ priv->next_pk_ptr = start;
+ nolock_regw_write(priv, ERXSTL, start);
+ erxrdpt = erxrdpt_workaround(priv->next_pk_ptr, start, end);
+ nolock_regw_write(priv, ERXRDPTL, erxrdpt);
+ nolock_regw_write(priv, ERXNDL, end);
+}
+
+static void nolock_txfifo_init(struct enc28j60_net *priv, u16 start, u16 end)
+{
+ if (start > 0x1FFF || end > 0x1FFF || start > end) {
+ if (netif_msg_drv(priv))
+ printk(KERN_ERR DRV_NAME ": %s(%d, %d) TXFIFO "
+ "bad parameters!\n", __FUNCTION__, start, end);
+ return;
+ }
+ /* set transmit buffer start + end */
+ nolock_regw_write(priv, ETXSTL, start);
+ nolock_regw_write(priv, ETXNDL, end);
+}
+
+static int enc28j60_hw_init(struct enc28j60_net *priv)
+{
+ u8 reg;
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() - %s\n", __FUNCTION__,
+ priv->full_duplex ? "FullDuplex" : "HalfDuplex");
+
+ mutex_lock(&priv->lock);
+ /* first reset the chip */
+ enc28j60_soft_reset(priv);
+ /* Clear ECON1 */
+ spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, ECON1, 0x00);
+ priv->bank = 0;
+ priv->hw_enable = false;
+ priv->tx_retry_count = 0;
+ priv->max_pk_counter = 0;
+ priv->rxfilter = RXFILTER_NORMAL;
+ /* enable address auto increment */
+ nolock_regb_write(priv, ECON2, ECON2_AUTOINC);
+
+ nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT);
+ nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);
+ mutex_unlock(&priv->lock);
+
+ /*
+ * Check the RevID.
+ * If it's 0x00 or 0xFF probably the enc28j60 is not mounted or
+ * damaged
+ */
+ reg = locked_regb_read(priv, EREVID);
+ if (netif_msg_drv(priv))
+ printk(KERN_INFO DRV_NAME ": chip RevID: 0x%02x\n", reg);
+ if (reg == 0x00 || reg == 0xff) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() Invalid RevId %d\n",
+ __FUNCTION__, reg);
+ return 0;
+ }
+
+ /* default filter mode: (unicast OR broadcast) AND crc valid */
+ locked_regb_write(priv, ERXFCON,
+ ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_BCEN);
+
+ /* enable MAC receive */
+ locked_regb_write(priv, MACON1,
+ MACON1_MARXEN | MACON1_TXPAUS | MACON1_RXPAUS);
+ /* enable automatic padding and CRC operations */
+ if (priv->full_duplex) {
+ locked_regb_write(priv, MACON3,
+ MACON3_PADCFG0 | MACON3_TXCRCEN |
+ MACON3_FRMLNEN | MACON3_FULDPX);
+ /* set inter-frame gap (non-back-to-back) */
+ locked_regb_write(priv, MAIPGL, 0x12);
+ /* set inter-frame gap (back-to-back) */
+ locked_regb_write(priv, MABBIPG, 0x15);
+ } else {
+ locked_regb_write(priv, MACON3,
+ MACON3_PADCFG0 | MACON3_TXCRCEN |
+ MACON3_FRMLNEN);
+ locked_regb_write(priv, MACON4, 1 << 6); /* DEFER bit */
+ /* set inter-frame gap (non-back-to-back) */
+ locked_regw_write(priv, MAIPGL, 0x0C12);
+ /* set inter-frame gap (back-to-back) */
+ locked_regb_write(priv, MABBIPG, 0x12);
+ }
+ /*
+ * MACLCON1 (default)
+ * MACLCON2 (default)
+ * Set the maximum packet size which the controller will accept
+ */
+ locked_regw_write(priv, MAMXFLL, MAX_FRAMELEN);
+
+ /* Configure LEDs */
+ if (!enc28j60_phy_write(priv, PHLCON, ENC28J60_LAMPS_MODE))
+ return 0;
+
+ if (priv->full_duplex) {
+ if (!enc28j60_phy_write(priv, PHCON1, PHCON1_PDPXMD))
+ return 0;
+ if (!enc28j60_phy_write(priv, PHCON2, 0x00))
+ return 0;
+ } else {
+ if (!enc28j60_phy_write(priv, PHCON1, 0x00))
+ return 0;
+ if (!enc28j60_phy_write(priv, PHCON2, PHCON2_HDLDIS))
+ return 0;
+ }
+ if (netif_msg_hw(priv))
+ enc28j60_dump_regs(priv, "Hw initialized.");
+
+ return 1;
+}
+
+static void enc28j60_hw_enable(struct enc28j60_net *priv)
+{
+ /* enable interrutps */
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enabling interrupts.\n",
+ __FUNCTION__);
+
+ enc28j60_phy_write(priv, PHIE, PHIE_PGEIE | PHIE_PLNKIE);
+
+ mutex_lock(&priv->lock);
+ nolock_reg_bfclr(priv, EIR, EIR_DMAIF | EIR_LINKIF |
+ EIR_TXIF | EIR_TXERIF | EIR_RXERIF | EIR_PKTIF);
+ nolock_regb_write(priv, EIE, EIE_INTIE | EIE_PKTIE | EIE_LINKIE |
+ EIE_TXIE | EIE_TXERIE | EIE_RXERIE);
+
+ /* enable receive logic */
+ nolock_reg_bfset(priv, ECON1, ECON1_RXEN);
+ priv->hw_enable = true;
+ mutex_unlock(&priv->lock);
+}
+
+static void enc28j60_hw_disable(struct enc28j60_net *priv)
+{
+ mutex_lock(&priv->lock);
+ /* disable interrutps and packet reception */
+ nolock_regb_write(priv, EIE, 0x00);
+ nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
+ priv->hw_enable = false;
+ mutex_unlock(&priv->lock);
+}
+
+static int
+enc28j60_setlink(struct net_device *ndev, u8 autoneg, u16 speed, u8 duplex)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+ int ret = 0;
+
+ if (!priv->hw_enable) {
+ if (autoneg == AUTONEG_DISABLE && speed == SPEED_10) {
+ priv->full_duplex = (duplex == DUPLEX_FULL);
+ if (!enc28j60_hw_init(priv)) {
+ if (netif_msg_drv(priv))
+ dev_err(&ndev->dev,
+ "hw_reset() failed\n");
+ ret = -EINVAL;
+ }
+ } else {
+ if (netif_msg_link(priv))
+ dev_warn(&ndev->dev,
+ "unsupported link setting\n");
+ ret = -EOPNOTSUPP;
+ }
+ } else {
+ if (netif_msg_link(priv))
+ dev_warn(&ndev->dev, "Warning: hw must be disabled "
+ "to set link mode\n");
+ ret = -EBUSY;
+ }
+ return ret;
+}
+
+/*
+ * Read the Transmit Status Vector
+ */
+static void enc28j60_read_tsv(struct enc28j60_net *priv, u8 tsv[TSV_SIZE])
+{
+ int endptr;
+
+ endptr = locked_regw_read(priv, ETXNDL);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": reading TSV at addr:0x%04x\n",
+ endptr + 1);
+ enc28j60_mem_read(priv, endptr + 1, sizeof(tsv), tsv);
+}
+
+static void enc28j60_dump_tsv(struct enc28j60_net *priv, const char *msg,
+ u8 tsv[TSV_SIZE])
+{
+ u16 tmp1, tmp2;
+
+ printk(KERN_DEBUG DRV_NAME ": %s - TSV:\n", msg);
+ tmp1 = tsv[1];
+ tmp1 <<= 8;
+ tmp1 |= tsv[0];
+
+ tmp2 = tsv[5];
+ tmp2 <<= 8;
+ tmp2 |= tsv[4];
+
+ printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, CollisionCount: %d,"
+ " TotByteOnWire: %d\n", tmp1, tsv[2] & 0x0f, tmp2);
+ printk(KERN_DEBUG DRV_NAME ": TxDone: %d, CRCErr:%d, LenChkErr: %d,"
+ " LenOutOfRange: %d\n", TSV_GETBIT(tsv, TSV_TXDONE),
+ TSV_GETBIT(tsv, TSV_TXCRCERROR),
+ TSV_GETBIT(tsv, TSV_TXLENCHKERROR),
+ TSV_GETBIT(tsv, TSV_TXLENOUTOFRANGE));
+ printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, "
+ "PacketDefer: %d, ExDefer: %d\n",
+ TSV_GETBIT(tsv, TSV_TXMULTICAST),
+ TSV_GETBIT(tsv, TSV_TXBROADCAST),
+ TSV_GETBIT(tsv, TSV_TXPACKETDEFER),
+ TSV_GETBIT(tsv, TSV_TXEXDEFER));
+ printk(KERN_DEBUG DRV_NAME ": ExCollision: %d, LateCollision: %d, "
+ "Giant: %d, Underrun: %d\n",
+ TSV_GETBIT(tsv, TSV_TXEXCOLLISION),
+ TSV_GETBIT(tsv, TSV_TXLATECOLLISION),
+ TSV_GETBIT(tsv, TSV_TXGIANT), TSV_GETBIT(tsv, TSV_TXUNDERRUN));
+ printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d, "
+ "BackPressApp: %d, VLanTagFrame: %d\n",
+ TSV_GETBIT(tsv, TSV_TXCONTROLFRAME),
+ TSV_GETBIT(tsv, TSV_TXPAUSEFRAME),
+ TSV_GETBIT(tsv, TSV_BACKPRESSUREAPP),
+ TSV_GETBIT(tsv, TSV_TXVLANTAGFRAME));
+}
+
+/*
+ * Receive Status vector
+ */
+static void enc28j60_dump_rsv(struct enc28j60_net *priv, const char *msg,
+ u16 pk_ptr, int len, u16 sts)
+{
+ printk(KERN_DEBUG DRV_NAME ": %s - NextPk: 0x%04x - RSV:\n",
+ msg, pk_ptr);
+ printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, DribbleNibble: %d\n", len,
+ RSV_GETBIT(sts, RSV_DRIBBLENIBBLE));
+ printk(KERN_DEBUG DRV_NAME ": RxOK: %d, CRCErr:%d, LenChkErr: %d,"
+ " LenOutOfRange: %d\n", RSV_GETBIT(sts, RSV_RXOK),
+ RSV_GETBIT(sts, RSV_CRCERROR),
+ RSV_GETBIT(sts, RSV_LENCHECKERR),
+ RSV_GETBIT(sts, RSV_LENOUTOFRANGE));
+ printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, "
+ "LongDropEvent: %d, CarrierEvent: %d\n",
+ RSV_GETBIT(sts, RSV_RXMULTICAST),
+ RSV_GETBIT(sts, RSV_RXBROADCAST),
+ RSV_GETBIT(sts, RSV_RXLONGEVDROPEV),
+ RSV_GETBIT(sts, RSV_CARRIEREV));
+ printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d,"
+ " UnknownOp: %d, VLanTagFrame: %d\n",
+ RSV_GETBIT(sts, RSV_RXCONTROLFRAME),
+ RSV_GETBIT(sts, RSV_RXPAUSEFRAME),
+ RSV_GETBIT(sts, RSV_RXUNKNOWNOPCODE),
+ RSV_GETBIT(sts, RSV_RXTYPEVLAN));
+}
+
+static void dump_packet(const char *msg, int len, const char *data)
+{
+ printk(KERN_DEBUG DRV_NAME ": %s - packet len:%d\n", msg, len);
+ print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1,
+ data, len, true);
+}
+
+/*
+ * Hardware receive function.
+ * Read the buffer memory, update the FIFO pointer to free the buffer,
+ * check the status vector and decrement the packet counter.
+ */
+static void enc28j60_hw_rx(struct net_device *ndev)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+ struct sk_buff *skb = NULL;
+ u16 erxrdpt, next_packet, rxstat;
+ u8 rsv[RSV_SIZE];
+ int len;
+
+ if (netif_msg_rx_status(priv))
+ printk(KERN_DEBUG DRV_NAME ": RX pk_addr:0x%04x\n",
+ priv->next_pk_ptr);
+
+ if (unlikely(priv->next_pk_ptr > RXEND_INIT)) {
+ if (netif_msg_rx_err(priv))
+ dev_err(&ndev->dev,
+ "%s() Invalid packet address!! 0x%04x\n",
+ __FUNCTION__, priv->next_pk_ptr);
+ /* packet address corrupted: reset RX logic */
+ mutex_lock(&priv->lock);
+ nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
+ nolock_reg_bfset(priv, ECON1, ECON1_RXRST);
+ nolock_reg_bfclr(priv, ECON1, ECON1_RXRST);
+ nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT);
+ nolock_reg_bfclr(priv, EIR, EIR_RXERIF);
+ nolock_reg_bfset(priv, ECON1, ECON1_RXEN);
+ mutex_unlock(&priv->lock);
+ ndev->stats.rx_errors++;
+ return;
+ }
+ /* Read next packet pointer and rx status vector */
+ enc28j60_mem_read(priv, priv->next_pk_ptr, sizeof(rsv), rsv);
+
+ next_packet = rsv[1];
+ next_packet <<= 8;
+ next_packet |= rsv[0];
+
+ len = rsv[3];
+ len <<= 8;
+ len |= rsv[2];
+
+ rxstat = rsv[5];
+ rxstat <<= 8;
+ rxstat |= rsv[4];
+
+ if (netif_msg_rx_status(priv))
+ enc28j60_dump_rsv(priv, __FUNCTION__, next_packet, len, rxstat);
+
+ if (!RSV_GETBIT(rxstat, RSV_RXOK)) {
+ if (netif_msg_rx_err(priv))
+ dev_err(&ndev->dev, "Rx Error (%04x)\n", rxstat);
+ ndev->stats.rx_errors++;
+ if (RSV_GETBIT(rxstat, RSV_CRCERROR))
+ ndev->stats.rx_crc_errors++;
+ if (RSV_GETBIT(rxstat, RSV_LENCHECKERR))
+ ndev->stats.rx_frame_errors++;
+ } else {
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ if (netif_msg_rx_err(priv))
+ dev_err(&ndev->dev,
+ "out of memory for Rx'd frame\n");
+ ndev->stats.rx_dropped++;
+ } else {
+ skb->dev = ndev;
+ /* copy the packet from the receive buffer */
+ enc28j60_mem_read(priv, priv->next_pk_ptr + sizeof(rsv),
+ len, skb_put(skb, len));
+ if (netif_msg_pktdata(priv))
+ dump_packet(__FUNCTION__, skb->len, skb->data);
+ skb->protocol = eth_type_trans(skb, ndev);
+ /* update statistics */
+ ndev->stats.rx_packets++;
+ ndev->stats.rx_bytes += len;
+ ndev->last_rx = jiffies;
+ netif_rx(skb);
+ }
+ }
+ /*
+ * Move the RX read pointer to the start of the next
+ * received packet.
+ * This frees the memory we just read out
+ */
+ erxrdpt = erxrdpt_workaround(next_packet, RXSTART_INIT, RXEND_INIT);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT:0x%04x\n",
+ __FUNCTION__, erxrdpt);
+
+ mutex_lock(&priv->lock);
+ nolock_regw_write(priv, ERXRDPTL, erxrdpt);
+#ifdef CONFIG_ENC28J60_WRITEVERIFY
+ if (netif_msg_drv(priv)) {
+ u16 reg;
+ reg = nolock_regw_read(priv, ERXRDPTL);
+ if (reg != erxrdpt)
+ printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT verify "
+ "error (0x%04x - 0x%04x)\n", __FUNCTION__,
+ reg, erxrdpt);
+ }
+#endif
+ priv->next_pk_ptr = next_packet;
+ /* we are done with this packet, decrement the packet counter */
+ nolock_reg_bfset(priv, ECON2, ECON2_PKTDEC);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Calculate free space in RxFIFO
+ */
+static int enc28j60_get_free_rxfifo(struct enc28j60_net *priv)
+{
+ int epkcnt, erxst, erxnd, erxwr, erxrd;
+ int free_space;
+
+ mutex_lock(&priv->lock);
+ epkcnt = nolock_regb_read(priv, EPKTCNT);
+ if (epkcnt >= 255)
+ free_space = -1;
+ else {
+ erxst = nolock_regw_read(priv, ERXSTL);
+ erxnd = nolock_regw_read(priv, ERXNDL);
+ erxwr = nolock_regw_read(priv, ERXWRPTL);
+ erxrd = nolock_regw_read(priv, ERXRDPTL);
+
+ if (erxwr > erxrd)
+ free_space = (erxnd - erxst) - (erxwr - erxrd);
+ else if (erxwr == erxrd)
+ free_space = (erxnd - erxst);
+ else
+ free_space = erxrd - erxwr - 1;
+ }
+ mutex_unlock(&priv->lock);
+ if (netif_msg_rx_status(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() free_space = %d\n",
+ __FUNCTION__, free_space);
+ return free_space;
+}
+
+/*
+ * Access the PHY to determine link status
+ */
+static void enc28j60_check_link_status(struct net_device *ndev)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+ u16 reg;
+ int duplex;
+
+ reg = enc28j60_phy_read(priv, PHSTAT2);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() PHSTAT1: %04x, "
+ "PHSTAT2: %04x\n", __FUNCTION__,
+ enc28j60_phy_read(priv, PHSTAT1), reg);
+ duplex = reg & PHSTAT2_DPXSTAT;
+
+ if (reg & PHSTAT2_LSTAT) {
+ netif_carrier_on(ndev);
+ if (netif_msg_ifup(priv))
+ dev_info(&ndev->dev, "link up - %s\n",
+ duplex ? "Full duplex" : "Half duplex");
+ } else {
+ if (netif_msg_ifdown(priv))
+ dev_info(&ndev->dev, "link down\n");
+ netif_carrier_off(ndev);
+ }
+}
+
+static void enc28j60_tx_clear(struct net_device *ndev, bool err)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+
+ if (err)
+ ndev->stats.tx_errors++;
+ else
+ ndev->stats.tx_packets++;
+
+ if (priv->tx_skb) {
+ if (!err)
+ ndev->stats.tx_bytes += priv->tx_skb->len;
+ dev_kfree_skb(priv->tx_skb);
+ priv->tx_skb = NULL;
+ }
+ locked_reg_bfclr(priv, ECON1, ECON1_TXRTS);
+ netif_wake_queue(ndev);
+}
+
+/*
+ * RX handler
+ * ignore PKTIF because is unreliable! (look at the errata datasheet)
+ * check EPKTCNT is the suggested workaround.
+ * We don't need to clear interrupt flag, automatically done when
+ * enc28j60_hw_rx() decrements the packet counter.
+ * Returns how many packet processed.
+ */
+static int enc28j60_rx_interrupt(struct net_device *ndev)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+ int pk_counter, ret;
+
+ pk_counter = locked_regb_read(priv, EPKTCNT);
+ if (pk_counter && netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": intRX, pk_cnt: %d\n", pk_counter);
+ if (pk_counter > priv->max_pk_counter) {
+ /* update statistics */
+ priv->max_pk_counter = pk_counter;
+ if (netif_msg_rx_status(priv) && priv->max_pk_counter > 1)
+ printk(KERN_DEBUG DRV_NAME ": RX max_pk_cnt: %d\n",
+ priv->max_pk_counter);
+ }
+ ret = pk_counter;
+ while (pk_counter-- > 0)
+ enc28j60_hw_rx(ndev);
+
+ return ret;
+}
+
+static void enc28j60_irq_work_handler(struct work_struct *work)
+{
+ struct enc28j60_net *priv =
+ container_of(work, struct enc28j60_net, irq_work);
+ struct net_device *ndev = priv->netdev;
+ int intflags, loop;
+
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __FUNCTION__);
+ /* disable further interrupts */
+ locked_reg_bfclr(priv, EIE, EIE_INTIE);
+
+ do {
+ loop = 0;
+ intflags = locked_regb_read(priv, EIR);
+ /* DMA interrupt handler (not currently used) */
+ if ((intflags & EIR_DMAIF) != 0) {
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": intDMA(%d)\n", loop);
+ locked_reg_bfclr(priv, EIR, EIR_DMAIF);
+ }
+ /* LINK changed handler */
+ if ((intflags & EIR_LINKIF) != 0) {
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": intLINK(%d)\n", loop);
+ enc28j60_check_link_status(ndev);
+ /* read PHIR to clear the flag */
+ enc28j60_phy_read(priv, PHIR);
+ }
+ /* TX complete handler */
+ if ((intflags & EIR_TXIF) != 0) {
+ bool err = false;
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": intTX(%d)\n", loop);
+ priv->tx_retry_count = 0;
+ if (locked_regb_read(priv, ESTAT) & ESTAT_TXABRT) {
+ if (netif_msg_tx_err(priv))
+ dev_err(&ndev->dev,
+ "Tx Error (aborted)\n");
+ err = true;
+ }
+ if (netif_msg_tx_done(priv)) {
+ u8 tsv[TSV_SIZE];
+ enc28j60_read_tsv(priv, tsv);
+ enc28j60_dump_tsv(priv, "Tx Done", tsv);
+ }
+ enc28j60_tx_clear(ndev, err);
+ locked_reg_bfclr(priv, EIR, EIR_TXIF);
+ }
+ /* TX Error handler */
+ if ((intflags & EIR_TXERIF) != 0) {
+ u8 tsv[TSV_SIZE];
+
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": intTXErr(%d)\n", loop);
+ locked_reg_bfclr(priv, ECON1, ECON1_TXRTS);
+ enc28j60_read_tsv(priv, tsv);
+ if (netif_msg_tx_err(priv))
+ enc28j60_dump_tsv(priv, "Tx Error", tsv);
+ /* Reset TX logic */
+ mutex_lock(&priv->lock);
+ nolock_reg_bfset(priv, ECON1, ECON1_TXRST);
+ nolock_reg_bfclr(priv, ECON1, ECON1_TXRST);
+ nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);
+ mutex_unlock(&priv->lock);
+ /* Transmit Late collision check for retransmit */
+ if (TSV_GETBIT(tsv, TSV_TXLATECOLLISION)) {
+ if (netif_msg_tx_err(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": LateCollision TXErr (%d)\n",
+ priv->tx_retry_count);
+ if (priv->tx_retry_count++ < MAX_TX_RETRYCOUNT)
+ locked_reg_bfset(priv, ECON1,
+ ECON1_TXRTS);
+ else
+ enc28j60_tx_clear(ndev, true);
+ } else
+ enc28j60_tx_clear(ndev, true);
+ locked_reg_bfclr(priv, EIR, EIR_TXERIF);
+ }
+ /* RX Error handler */
+ if ((intflags & EIR_RXERIF) != 0) {
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": intRXErr(%d)\n", loop);
+ /* Check free FIFO space to flag RX overrun */
+ if (enc28j60_get_free_rxfifo(priv) <= 0) {
+ if (netif_msg_rx_err(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": RX Overrun\n");
+ ndev->stats.rx_dropped++;
+ }
+ locked_reg_bfclr(priv, EIR, EIR_RXERIF);
+ }
+ /* RX handler */
+ if (enc28j60_rx_interrupt(ndev))
+ loop++;
+ } while (loop);
+
+ /* re-enable interrupts */
+ locked_reg_bfset(priv, EIE, EIE_INTIE);
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() exit\n", __FUNCTION__);
+}
+
+/*
+ * Hardware transmit function.
+ * Fill the buffer memory and send the contents of the transmit buffer
+ * onto the network
+ */
+static void enc28j60_hw_tx(struct enc28j60_net *priv)
+{
+ if (netif_msg_tx_queued(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": Tx Packet Len:%d\n", priv->tx_skb->len);
+
+ if (netif_msg_pktdata(priv))
+ dump_packet(__FUNCTION__,
+ priv->tx_skb->len, priv->tx_skb->data);
+ enc28j60_packet_write(priv, priv->tx_skb->len, priv->tx_skb->data);
+
+#ifdef CONFIG_ENC28J60_WRITEVERIFY
+ /* readback and verify written data */
+ if (netif_msg_drv(priv)) {
+ int test_len, k;
+ u8 test_buf[64]; /* limit the test to the first 64 bytes */
+ int okflag;
+
+ test_len = priv->tx_skb->len;
+ if (test_len > sizeof(test_buf))
+ test_len = sizeof(test_buf);
+
+ /* + 1 to skip control byte */
+ enc28j60_mem_read(priv, TXSTART_INIT + 1, test_len, test_buf);
+ okflag = 1;
+ for (k = 0; k < test_len; k++) {
+ if (priv->tx_skb->data[k] != test_buf[k]) {
+ printk(KERN_DEBUG DRV_NAME
+ ": Error, %d location differ: "
+ "0x%02x-0x%02x\n", k,
+ priv->tx_skb->data[k], test_buf[k]);
+ okflag = 0;
+ }
+ }
+ if (!okflag)
+ printk(KERN_DEBUG DRV_NAME ": Tx write buffer, "
+ "verify ERROR!\n");
+ }
+#endif
+ /* set TX request flag */
+ locked_reg_bfset(priv, ECON1, ECON1_TXRTS);
+}
+
+static int enc28j60_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+
+ if (netif_msg_tx_queued(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __FUNCTION__);
+
+ /* If some error occurs while trying to transmit this
+ * packet, you should return '1' from this function.
+ * In such a case you _may not_ do anything to the
+ * SKB, it is still owned by the network queueing
+ * layer when an error is returned. This means you
+ * may not modify any SKB fields, you may not free
+ * the SKB, etc.
+ */
+ netif_stop_queue(dev);
+
+ /* save the timestamp */
+ priv->netdev->trans_start = jiffies;
+ /* Remember the skb for deferred processing */
+ priv->tx_skb = skb;
+ schedule_work(&priv->tx_work);
+
+ return 0;
+}
+
+static void enc28j60_tx_work_handler(struct work_struct *work)
+{
+ struct enc28j60_net *priv =
+ container_of(work, struct enc28j60_net, tx_work);
+
+ /* actual delivery of data */
+ enc28j60_hw_tx(priv);
+}
+
+static irqreturn_t enc28j60_irq(int irq, void *dev_id)
+{
+ struct enc28j60_net *priv = dev_id;
+
+ /*
+ * Can't do anything in interrupt context because we need to
+ * block (spi_sync() is blocking) so fire of the interrupt
+ * handling workqueue.
+ * Remember that we access enc28j60 registers through SPI bus
+ * via spi_sync() call.
+ */
+ schedule_work(&priv->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void enc28j60_tx_timeout(struct net_device *ndev)
+{
+ struct enc28j60_net *priv = netdev_priv(ndev);
+
+ if (netif_msg_timer(priv))
+ dev_err(&ndev->dev, DRV_NAME " tx timeout\n");
+
+ ndev->stats.tx_errors++;
+ /* can't restart safely under softirq */
+ schedule_work(&priv->restart_work);
+}
+
+/*
+ * Open/initialize the board. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+static int enc28j60_net_open(struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __FUNCTION__);
+
+ if (!is_valid_ether_addr(dev->dev_addr)) {
+ if (netif_msg_ifup(priv)) {
+ DECLARE_MAC_BUF(mac);
+ dev_err(&dev->dev, "invalid MAC address %s\n",
+ print_mac(mac, dev->dev_addr));
+ }
+ return -EADDRNOTAVAIL;
+ }
+ /* Reset the hardware here */
+ enc28j60_hw_disable(priv);
+ if (!enc28j60_hw_init(priv)) {
+ if (netif_msg_ifup(priv))
+ dev_err(&dev->dev, "hw_reset() failed\n");
+ return -EINVAL;
+ }
+ /* Update the MAC address (in case user has changed it) */
+ enc28j60_set_hw_macaddr(dev);
+ /* Enable interrupts */
+ enc28j60_hw_enable(priv);
+ /* check link status */
+ enc28j60_check_link_status(dev);
+ /* We are now ready to accept transmit requests from
+ * the queueing layer of the networking.
+ */
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+/* The inverse routine to net_open(). */
+static int enc28j60_net_close(struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __FUNCTION__);
+
+ enc28j60_hw_disable(priv);
+ netif_stop_queue(dev);
+
+ return 0;
+}
+
+/*
+ * Set or clear the multicast filter for this adapter
+ * num_addrs == -1 Promiscuous mode, receive all packets
+ * num_addrs == 0 Normal mode, filter out multicast packets
+ * num_addrs > 0 Multicast mode, receive normal and MC packets
+ */
+static void enc28j60_set_multicast_list(struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+ int oldfilter = priv->rxfilter;
+
+ if (dev->flags & IFF_PROMISC) {
+ if (netif_msg_link(priv))
+ dev_info(&dev->dev, "promiscuous mode\n");
+ priv->rxfilter = RXFILTER_PROMISC;
+ } else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count) {
+ if (netif_msg_link(priv))
+ dev_info(&dev->dev, "%smulticast mode\n",
+ (dev->flags & IFF_ALLMULTI) ? "all-" : "");
+ priv->rxfilter = RXFILTER_MULTI;
+ } else {
+ if (netif_msg_link(priv))
+ dev_info(&dev->dev, "normal mode\n");
+ priv->rxfilter = RXFILTER_NORMAL;
+ }
+
+ if (oldfilter != priv->rxfilter)
+ schedule_work(&priv->setrx_work);
+}
+
+static void enc28j60_setrx_work_handler(struct work_struct *work)
+{
+ struct enc28j60_net *priv =
+ container_of(work, struct enc28j60_net, setrx_work);
+
+ if (priv->rxfilter == RXFILTER_PROMISC) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": promiscuous mode\n");
+ locked_regb_write(priv, ERXFCON, 0x00);
+ } else if (priv->rxfilter == RXFILTER_MULTI) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": multicast mode\n");
+ locked_regb_write(priv, ERXFCON,
+ ERXFCON_UCEN | ERXFCON_CRCEN |
+ ERXFCON_BCEN | ERXFCON_MCEN);
+ } else {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": normal mode\n");
+ locked_regb_write(priv, ERXFCON,
+ ERXFCON_UCEN | ERXFCON_CRCEN |
+ ERXFCON_BCEN);
+ }
+}
+
+static void enc28j60_restart_work_handler(struct work_struct *work)
+{
+ struct enc28j60_net *priv =
+ container_of(work, struct enc28j60_net, restart_work);
+ struct net_device *ndev = priv->netdev;
+ int ret;
+
+ rtnl_lock();
+ if (netif_running(ndev)) {
+ enc28j60_net_close(ndev);
+ ret = enc28j60_net_open(ndev);
+ if (unlikely(ret)) {
+ dev_info(&ndev->dev, " could not restart %d\n", ret);
+ dev_close(ndev);
+ }
+ }
+ rtnl_unlock();
+}
+
+/* ......................... ETHTOOL SUPPORT ........................... */
+
+static void
+enc28j60_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info,
+ dev->dev.parent->bus_id, sizeof(info->bus_info));
+}
+
+static int
+enc28j60_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+
+ cmd->transceiver = XCVR_INTERNAL;
+ cmd->supported = SUPPORTED_10baseT_Half
+ | SUPPORTED_10baseT_Full
+ | SUPPORTED_TP;
+ cmd->speed = SPEED_10;
+ cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF;
+ cmd->port = PORT_TP;
+ cmd->autoneg = AUTONEG_DISABLE;
+
+ return 0;
+}
+
+static int
+enc28j60_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ return enc28j60_setlink(dev, cmd->autoneg, cmd->speed, cmd->duplex);
+}
+
+static u32 enc28j60_get_msglevel(struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+ return priv->msg_enable;
+}
+
+static void enc28j60_set_msglevel(struct net_device *dev, u32 val)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+ priv->msg_enable = val;
+}
+
+static const struct ethtool_ops enc28j60_ethtool_ops = {
+ .get_settings = enc28j60_get_settings,
+ .set_settings = enc28j60_set_settings,
+ .get_drvinfo = enc28j60_get_drvinfo,
+ .get_msglevel = enc28j60_get_msglevel,
+ .set_msglevel = enc28j60_set_msglevel,
+};
+
+static int enc28j60_chipset_init(struct net_device *dev)
+{
+ struct enc28j60_net *priv = netdev_priv(dev);
+
+ return enc28j60_hw_init(priv);
+}
+
+static int __devinit enc28j60_probe(struct spi_device *spi)
+{
+ struct net_device *dev;
+ struct enc28j60_net *priv;
+ int ret = 0;
+
+ if (netif_msg_drv(&debug))
+ dev_info(&spi->dev, DRV_NAME " Ethernet driver %s loaded\n",
+ DRV_VERSION);
+
+ dev = alloc_etherdev(sizeof(struct enc28j60_net));
+ if (!dev) {
+ if (netif_msg_drv(&debug))
+ dev_err(&spi->dev, DRV_NAME
+ ": unable to alloc new ethernet\n");
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+ priv = netdev_priv(dev);
+
+ priv->netdev = dev; /* priv to netdev reference */
+ priv->spi = spi; /* priv to spi reference */
+ priv->msg_enable = netif_msg_init(debug.msg_enable,
+ ENC28J60_MSG_DEFAULT);
+ mutex_init(&priv->lock);
+ INIT_WORK(&priv->tx_work, enc28j60_tx_work_handler);
+ INIT_WORK(&priv->setrx_work, enc28j60_setrx_work_handler);
+ INIT_WORK(&priv->irq_work, enc28j60_irq_work_handler);
+ INIT_WORK(&priv->restart_work, enc28j60_restart_work_handler);
+ dev_set_drvdata(&spi->dev, priv); /* spi to priv reference */
+ SET_NETDEV_DEV(dev, &spi->dev);
+
+ if (!enc28j60_chipset_init(dev)) {
+ if (netif_msg_probe(priv))
+ dev_info(&spi->dev, DRV_NAME " chip not found\n");
+ ret = -EIO;
+ goto error_irq;
+ }
+ random_ether_addr(dev->dev_addr);
+ enc28j60_set_hw_macaddr(dev);
+
+ ret = request_irq(spi->irq, enc28j60_irq, IRQF_TRIGGER_FALLING,
+ DRV_NAME, priv);
+ if (ret < 0) {
+ if (netif_msg_probe(priv))
+ dev_err(&spi->dev, DRV_NAME ": request irq %d failed "
+ "(ret = %d)\n", spi->irq, ret);
+ goto error_irq;
+ }
+
+ dev->if_port = IF_PORT_10BASET;
+ dev->irq = spi->irq;
+ dev->open = enc28j60_net_open;
+ dev->stop = enc28j60_net_close;
+ dev->hard_start_xmit = enc28j60_send_packet;
+ dev->set_multicast_list = &enc28j60_set_multicast_list;
+ dev->set_mac_address = enc28j60_set_mac_address;
+ dev->tx_timeout = &enc28j60_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+ SET_ETHTOOL_OPS(dev, &enc28j60_ethtool_ops);
+
+ ret = register_netdev(dev);
+ if (ret) {
+ if (netif_msg_probe(priv))
+ dev_err(&spi->dev, "register netdev " DRV_NAME
+ " failed (ret = %d)\n", ret);
+ goto error_register;
+ }
+ dev_info(&dev->dev, DRV_NAME " driver registered\n");
+
+ return 0;
+
+error_register:
+ free_irq(spi->irq, priv);
+error_irq:
+ free_netdev(dev);
+error_alloc:
+ return ret;
+}
+
+static int enc28j60_remove(struct spi_device *spi)
+{
+ struct enc28j60_net *priv = dev_get_drvdata(&spi->dev);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": remove\n");
+
+ unregister_netdev(priv->netdev);
+ free_irq(spi->irq, priv);
+ free_netdev(priv->netdev);
+
+ return 0;
+}
+
+static struct spi_driver enc28j60_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = enc28j60_probe,
+ .remove = __devexit_p(enc28j60_remove),
+};
+
+static int __init enc28j60_init(void)
+{
+ return spi_register_driver(&enc28j60_driver);
+}
+
+module_init(enc28j60_init);
+
+static void __exit enc28j60_exit(void)
+{
+ spi_unregister_driver(&enc28j60_driver);
+}
+
+module_exit(enc28j60_exit);
+
+MODULE_DESCRIPTION(DRV_NAME " ethernet driver");
+MODULE_AUTHOR("Claudio Lanconelli <lanconelli.claudio@eptar.com>");
+MODULE_LICENSE("GPL");
+module_param_named(debug, debug.msg_enable, int, 0);
+MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., ffff=all)");
--- /dev/null
+/*
+ * enc28j60_hw.h: EDTP FrameThrower style enc28j60 registers
+ *
+ * $Id: enc28j60_hw.h,v 1.9 2007/12/14 11:59:16 claudio Exp $
+ */
+
+#ifndef _ENC28J60_HW_H
+#define _ENC28J60_HW_H
+
+/*
+ * ENC28J60 Control Registers
+ * Control register definitions are a combination of address,
+ * bank number, and Ethernet/MAC/PHY indicator bits.
+ * - Register address (bits 0-4)
+ * - Bank number (bits 5-6)
+ * - MAC/MII indicator (bit 7)
+ */
+#define ADDR_MASK 0x1F
+#define BANK_MASK 0x60
+#define SPRD_MASK 0x80
+/* All-bank registers */
+#define EIE 0x1B
+#define EIR 0x1C
+#define ESTAT 0x1D
+#define ECON2 0x1E
+#define ECON1 0x1F
+/* Bank 0 registers */
+#define ERDPTL (0x00|0x00)
+#define ERDPTH (0x01|0x00)
+#define EWRPTL (0x02|0x00)
+#define EWRPTH (0x03|0x00)
+#define ETXSTL (0x04|0x00)
+#define ETXSTH (0x05|0x00)
+#define ETXNDL (0x06|0x00)
+#define ETXNDH (0x07|0x00)
+#define ERXSTL (0x08|0x00)
+#define ERXSTH (0x09|0x00)
+#define ERXNDL (0x0A|0x00)
+#define ERXNDH (0x0B|0x00)
+#define ERXRDPTL (0x0C|0x00)
+#define ERXRDPTH (0x0D|0x00)
+#define ERXWRPTL (0x0E|0x00)
+#define ERXWRPTH (0x0F|0x00)
+#define EDMASTL (0x10|0x00)
+#define EDMASTH (0x11|0x00)
+#define EDMANDL (0x12|0x00)
+#define EDMANDH (0x13|0x00)
+#define EDMADSTL (0x14|0x00)
+#define EDMADSTH (0x15|0x00)
+#define EDMACSL (0x16|0x00)
+#define EDMACSH (0x17|0x00)
+/* Bank 1 registers */
+#define EHT0 (0x00|0x20)
+#define EHT1 (0x01|0x20)
+#define EHT2 (0x02|0x20)
+#define EHT3 (0x03|0x20)
+#define EHT4 (0x04|0x20)
+#define EHT5 (0x05|0x20)
+#define EHT6 (0x06|0x20)
+#define EHT7 (0x07|0x20)
+#define EPMM0 (0x08|0x20)
+#define EPMM1 (0x09|0x20)
+#define EPMM2 (0x0A|0x20)
+#define EPMM3 (0x0B|0x20)
+#define EPMM4 (0x0C|0x20)
+#define EPMM5 (0x0D|0x20)
+#define EPMM6 (0x0E|0x20)
+#define EPMM7 (0x0F|0x20)
+#define EPMCSL (0x10|0x20)
+#define EPMCSH (0x11|0x20)
+#define EPMOL (0x14|0x20)
+#define EPMOH (0x15|0x20)
+#define EWOLIE (0x16|0x20)
+#define EWOLIR (0x17|0x20)
+#define ERXFCON (0x18|0x20)
+#define EPKTCNT (0x19|0x20)
+/* Bank 2 registers */
+#define MACON1 (0x00|0x40|SPRD_MASK)
+/* #define MACON2 (0x01|0x40|SPRD_MASK) */
+#define MACON3 (0x02|0x40|SPRD_MASK)
+#define MACON4 (0x03|0x40|SPRD_MASK)
+#define MABBIPG (0x04|0x40|SPRD_MASK)
+#define MAIPGL (0x06|0x40|SPRD_MASK)
+#define MAIPGH (0x07|0x40|SPRD_MASK)
+#define MACLCON1 (0x08|0x40|SPRD_MASK)
+#define MACLCON2 (0x09|0x40|SPRD_MASK)
+#define MAMXFLL (0x0A|0x40|SPRD_MASK)
+#define MAMXFLH (0x0B|0x40|SPRD_MASK)
+#define MAPHSUP (0x0D|0x40|SPRD_MASK)
+#define MICON (0x11|0x40|SPRD_MASK)
+#define MICMD (0x12|0x40|SPRD_MASK)
+#define MIREGADR (0x14|0x40|SPRD_MASK)
+#define MIWRL (0x16|0x40|SPRD_MASK)
+#define MIWRH (0x17|0x40|SPRD_MASK)
+#define MIRDL (0x18|0x40|SPRD_MASK)
+#define MIRDH (0x19|0x40|SPRD_MASK)
+/* Bank 3 registers */
+#define MAADR1 (0x00|0x60|SPRD_MASK)
+#define MAADR0 (0x01|0x60|SPRD_MASK)
+#define MAADR3 (0x02|0x60|SPRD_MASK)
+#define MAADR2 (0x03|0x60|SPRD_MASK)
+#define MAADR5 (0x04|0x60|SPRD_MASK)
+#define MAADR4 (0x05|0x60|SPRD_MASK)
+#define EBSTSD (0x06|0x60)
+#define EBSTCON (0x07|0x60)
+#define EBSTCSL (0x08|0x60)
+#define EBSTCSH (0x09|0x60)
+#define MISTAT (0x0A|0x60|SPRD_MASK)
+#define EREVID (0x12|0x60)
+#define ECOCON (0x15|0x60)
+#define EFLOCON (0x17|0x60)
+#define EPAUSL (0x18|0x60)
+#define EPAUSH (0x19|0x60)
+/* PHY registers */
+#define PHCON1 0x00
+#define PHSTAT1 0x01
+#define PHHID1 0x02
+#define PHHID2 0x03
+#define PHCON2 0x10
+#define PHSTAT2 0x11
+#define PHIE 0x12
+#define PHIR 0x13
+#define PHLCON 0x14
+
+/* ENC28J60 EIE Register Bit Definitions */
+#define EIE_INTIE 0x80
+#define EIE_PKTIE 0x40
+#define EIE_DMAIE 0x20
+#define EIE_LINKIE 0x10
+#define EIE_TXIE 0x08
+/* #define EIE_WOLIE 0x04 (reserved) */
+#define EIE_TXERIE 0x02
+#define EIE_RXERIE 0x01
+/* ENC28J60 EIR Register Bit Definitions */
+#define EIR_PKTIF 0x40
+#define EIR_DMAIF 0x20
+#define EIR_LINKIF 0x10
+#define EIR_TXIF 0x08
+/* #define EIR_WOLIF 0x04 (reserved) */
+#define EIR_TXERIF 0x02
+#define EIR_RXERIF 0x01
+/* ENC28J60 ESTAT Register Bit Definitions */
+#define ESTAT_INT 0x80
+#define ESTAT_LATECOL 0x10
+#define ESTAT_RXBUSY 0x04
+#define ESTAT_TXABRT 0x02
+#define ESTAT_CLKRDY 0x01
+/* ENC28J60 ECON2 Register Bit Definitions */
+#define ECON2_AUTOINC 0x80
+#define ECON2_PKTDEC 0x40
+#define ECON2_PWRSV 0x20
+#define ECON2_VRPS 0x08
+/* ENC28J60 ECON1 Register Bit Definitions */
+#define ECON1_TXRST 0x80
+#define ECON1_RXRST 0x40
+#define ECON1_DMAST 0x20
+#define ECON1_CSUMEN 0x10
+#define ECON1_TXRTS 0x08
+#define ECON1_RXEN 0x04
+#define ECON1_BSEL1 0x02
+#define ECON1_BSEL0 0x01
+/* ENC28J60 MACON1 Register Bit Definitions */
+#define MACON1_LOOPBK 0x10
+#define MACON1_TXPAUS 0x08
+#define MACON1_RXPAUS 0x04
+#define MACON1_PASSALL 0x02
+#define MACON1_MARXEN 0x01
+/* ENC28J60 MACON2 Register Bit Definitions */
+#define MACON2_MARST 0x80
+#define MACON2_RNDRST 0x40
+#define MACON2_MARXRST 0x08
+#define MACON2_RFUNRST 0x04
+#define MACON2_MATXRST 0x02
+#define MACON2_TFUNRST 0x01
+/* ENC28J60 MACON3 Register Bit Definitions */
+#define MACON3_PADCFG2 0x80
+#define MACON3_PADCFG1 0x40
+#define MACON3_PADCFG0 0x20
+#define MACON3_TXCRCEN 0x10
+#define MACON3_PHDRLEN 0x08
+#define MACON3_HFRMLEN 0x04
+#define MACON3_FRMLNEN 0x02
+#define MACON3_FULDPX 0x01
+/* ENC28J60 MICMD Register Bit Definitions */
+#define MICMD_MIISCAN 0x02
+#define MICMD_MIIRD 0x01
+/* ENC28J60 MISTAT Register Bit Definitions */
+#define MISTAT_NVALID 0x04
+#define MISTAT_SCAN 0x02
+#define MISTAT_BUSY 0x01
+/* ENC28J60 ERXFCON Register Bit Definitions */
+#define ERXFCON_UCEN 0x80
+#define ERXFCON_ANDOR 0x40
+#define ERXFCON_CRCEN 0x20
+#define ERXFCON_PMEN 0x10
+#define ERXFCON_MPEN 0x08
+#define ERXFCON_HTEN 0x04
+#define ERXFCON_MCEN 0x02
+#define ERXFCON_BCEN 0x01
+
+/* ENC28J60 PHY PHCON1 Register Bit Definitions */
+#define PHCON1_PRST 0x8000
+#define PHCON1_PLOOPBK 0x4000
+#define PHCON1_PPWRSV 0x0800
+#define PHCON1_PDPXMD 0x0100
+/* ENC28J60 PHY PHSTAT1 Register Bit Definitions */
+#define PHSTAT1_PFDPX 0x1000
+#define PHSTAT1_PHDPX 0x0800
+#define PHSTAT1_LLSTAT 0x0004
+#define PHSTAT1_JBSTAT 0x0002
+/* ENC28J60 PHY PHSTAT2 Register Bit Definitions */
+#define PHSTAT2_TXSTAT (1 << 13)
+#define PHSTAT2_RXSTAT (1 << 12)
+#define PHSTAT2_COLSTAT (1 << 11)
+#define PHSTAT2_LSTAT (1 << 10)
+#define PHSTAT2_DPXSTAT (1 << 9)
+#define PHSTAT2_PLRITY (1 << 5)
+/* ENC28J60 PHY PHCON2 Register Bit Definitions */
+#define PHCON2_FRCLINK 0x4000
+#define PHCON2_TXDIS 0x2000
+#define PHCON2_JABBER 0x0400
+#define PHCON2_HDLDIS 0x0100
+/* ENC28J60 PHY PHIE Register Bit Definitions */
+#define PHIE_PLNKIE (1 << 4)
+#define PHIE_PGEIE (1 << 1)
+/* ENC28J60 PHY PHIR Register Bit Definitions */
+#define PHIR_PLNKIF (1 << 4)
+#define PHIR_PGEIF (1 << 1)
+
+/* ENC28J60 Packet Control Byte Bit Definitions */
+#define PKTCTRL_PHUGEEN 0x08
+#define PKTCTRL_PPADEN 0x04
+#define PKTCTRL_PCRCEN 0x02
+#define PKTCTRL_POVERRIDE 0x01
+
+/* ENC28J60 Transmit Status Vector */
+#define TSV_TXBYTECNT 0
+#define TSV_TXCOLLISIONCNT 16
+#define TSV_TXCRCERROR 20
+#define TSV_TXLENCHKERROR 21
+#define TSV_TXLENOUTOFRANGE 22
+#define TSV_TXDONE 23
+#define TSV_TXMULTICAST 24
+#define TSV_TXBROADCAST 25
+#define TSV_TXPACKETDEFER 26
+#define TSV_TXEXDEFER 27
+#define TSV_TXEXCOLLISION 28
+#define TSV_TXLATECOLLISION 29
+#define TSV_TXGIANT 30
+#define TSV_TXUNDERRUN 31
+#define TSV_TOTBYTETXONWIRE 32
+#define TSV_TXCONTROLFRAME 48
+#define TSV_TXPAUSEFRAME 49
+#define TSV_BACKPRESSUREAPP 50
+#define TSV_TXVLANTAGFRAME 51
+
+#define TSV_SIZE 7
+#define TSV_BYTEOF(x) ((x) / 8)
+#define TSV_BITMASK(x) (1 << ((x) % 8))
+#define TSV_GETBIT(x, y) (((x)[TSV_BYTEOF(y)] & TSV_BITMASK(y)) ? 1 : 0)
+
+/* ENC28J60 Receive Status Vector */
+#define RSV_RXLONGEVDROPEV 16
+#define RSV_CARRIEREV 18
+#define RSV_CRCERROR 20
+#define RSV_LENCHECKERR 21
+#define RSV_LENOUTOFRANGE 22
+#define RSV_RXOK 23
+#define RSV_RXMULTICAST 24
+#define RSV_RXBROADCAST 25
+#define RSV_DRIBBLENIBBLE 26
+#define RSV_RXCONTROLFRAME 27
+#define RSV_RXPAUSEFRAME 28
+#define RSV_RXUNKNOWNOPCODE 29
+#define RSV_RXTYPEVLAN 30
+
+#define RSV_SIZE 6
+#define RSV_BITMASK(x) (1 << ((x) - 16))
+#define RSV_GETBIT(x, y) (((x) & RSV_BITMASK(y)) ? 1 : 0)
+
+
+/* SPI operation codes */
+#define ENC28J60_READ_CTRL_REG 0x00
+#define ENC28J60_READ_BUF_MEM 0x3A
+#define ENC28J60_WRITE_CTRL_REG 0x40
+#define ENC28J60_WRITE_BUF_MEM 0x7A
+#define ENC28J60_BIT_FIELD_SET 0x80
+#define ENC28J60_BIT_FIELD_CLR 0xA0
+#define ENC28J60_SOFT_RESET 0xFF
+
+
+/* buffer boundaries applied to internal 8K ram
+ * entire available packet buffer space is allocated.
+ * Give TX buffer space for one full ethernet frame (~1500 bytes)
+ * receive buffer gets the rest */
+#define TXSTART_INIT 0x1A00
+#define TXEND_INIT 0x1FFF
+
+/* Put RX buffer at 0 as suggested by the Errata datasheet */
+#define RXSTART_INIT 0x0000
+#define RXEND_INIT 0x19FF
+
+/* maximum ethernet frame length */
+#define MAX_FRAMELEN 1518
+
+/* Prefered half duplex: LEDA: Link status LEDB: Rx/Tx activity */
+#define ENC28J60_LAMPS_MODE 0x3476
+
+#endif
projects / ~andy / linux / commitdiff