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Message-ID: <AANLkTi=D+WQmsgaaGWzvgmk1CAffURM3kWPwPVbL3k9V@mail.gmail.com>
Date: Tue, 8 Feb 2011 20:18:05 +0530
From: Balaji Venkatachalam <balaji.v@...takaa.com>
To: netdev@...r.kernel.org
Cc: mohan@...takaa.com, blue.cube@...nam.cz,
lanconelli.claudio@...ar.com, sriram@...takaa.com,
vbalaji.acs@...il.com
Subject: Re: [PATCH]netdev: add driver for enc424j600 ethernet chip on SPI bus
From: Balaji Venkatachalam <balaji.v@...takaa.com>
Updated patch [1.30] for Microchip enc424j600 ethernet chip controlled via SPI.
I tested it on my custom board with ARM9 (Freescale i.MX233) with
Kernel 2.6.31.14.
I tested the corrected get_regs implementation with ethtool using the command:
"ethtool -d eth0".
It gives output in "Offset Value" format.
Changes done since V1.29 to V1.30
1. Fixed Compiler Warning due to wrong get_regs implementation
2. added enc424j600_get_regs, get_regs functionality
for use with ethtool.
3. removed unnecessary & unformatted comments
4. replaced enc424j600_set_bits and enc424j600_clear_bits with
enc424j600_write_bits.
5. removed unnecessary empty lines.
Changes done since V1.28 to V1.29
1. enc424j600_spi_trans function implementation optimized
2. Unnecessary comments and Improper Comments removed
3. Added an empty line after variable declaration in all functions
4. mapped enc424j600_dump_regs to eth_ops get_regs
5. removed the hardcoding of return type in enc424j600_probe function
Changes done since V1.27 to V1.28
1. did some code formatting
Changes done since V1.24 to V1.27
1. Timeout Mechanism implemented for enc424j600_soft_reset function
2. Timeout Mechanism implemented for enc424j600_wait_for_autoneg function
3. Window Naming changed to enum
4. Removed WRITEVERIFY functionality
Todo List:
1. Low Power Mode Functionality implementation
2. Provide Support for On-Chip DMA
3. Remove mutex_lock wherever not required
Any comments are welcome.
Signed-off-by: Balaji Venkatachalam <balaji.v@...takaa.com>
---
diff -uprN -X a/Documentation/dontdiff a/drivers/net/enc424j600.c
b/drivers/net/enc424j600.c
--- a/drivers/net/enc424j600.c 1970-01-01 05:30:00.000000000 +0530
+++ b/drivers/net/enc424j600.c 2011-02-08 20:10:26.000000000 +0530
@@ -0,0 +1,1748 @@
+/*
+ * Microchip ENC424J600 ethernet driver (MAC + PHY) on SPI bus
+ *
+ * Copyright (C) 2011 Thotaka Technologies Pvt Ltd
+ * Author: Balaji Venkatachalam <balaji.v@...takaa.com>
+ * based on enc424j600.c written by Kuba Marek
+ * based on enc28j60.c written by Claudio Lanconelli
+ *
+ * Changes done since V1.29 to V1.30
+ * 1. Fixed Compiler Warning due to wrong get_regs implementation
+ * 2. added enc424j600_get_regs, get_regs functionality
+ * for use with ethtool.
+ * 3. removed unnecessary & unformatted comments
+ * 4. replaced enc424j600_set_bits and enc424j600_clear_bits with
+ * enc424j600_write_bits.
+ * 5. removed unnecessary empty lines.
+ *
+ * Changes done since V1.28 to V1.29
+ * 1. enc424j600_spi_trans function implementation optimized
+ * 2. Unnecessary comments and Improper Comments removed
+ * 3. Added an empty line after variable declaration in all functions
+ * 4. mapped enc424j600_dump_regs to eth_ops get_regs
+ * 5. removed the hardcoding of return type in enc424j600_probe function
+ *
+ * Changes done since V1.27 to V1.28
+ * 1. did some code formatting
+ *
+ * Changes done since V1.24 to V1.27
+ * 1. Timeout Mechanism implemented for enc424j600_soft_reset function
+ * 2. Timeout Mechanism implemented for enc424j600_wait_for_autoneg function
+ * 3. Window Naming changed to enum
+ * 4. Removed WRITEVERIFY functionality
+ *
+ * Todo List:
+ * 1. Low Power Mode Functionality implementation
+ * 2. Provide Support for On-Chip DMA
+ * 3. Remove mutex_lock wherever not required
+ * 4. Propogate the return status code of enc424j600_hw_init
+ *
+ * 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.
+ *
+ */
+
+#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 "enc424j600_hw.h"
+
+#define DRV_NAME "enc424j600"
+#define DRV_VERSION "1.30"
+
+#define ENC424J600_MSG_DEFAULT \
+ (NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK)
+
+#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
+
+#define SPI_OPLEN 1
+
+#define SRAMSIZE 0x6000
+#define TXSTART 0x0000
+#define RXSTART 0x1600
+
+/* Enable SPI DMA. Default: 0 (Off) */
+static int enc424j600_enable_dma;
+
+enum {
+ RXFILTER_NORMAL,
+ RXFILTER_MULTI,
+ RXFILTER_PROMISC
+};
+enum {
+ RXWINDOW,
+ USERWINDOW,
+ GPWINDOW
+};
+
+/* Driver local data */
+struct enc424j600_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;
+ bool autoneg;
+ bool speed100;
+ int rxfilter;
+ u32 msg_enable;
+
+ u8 *spi_rx_buf;
+ u8 *spi_tx_buf;
+ dma_addr_t spi_tx_dma;
+ dma_addr_t spi_rx_dma;
+};
+
+/* use ethtool to change the level for any given device */
+static struct {
+ u32 msg_enable;
+} debug = { -1 };
+
+static int enc424j600_spi_trans(struct enc424j600_net *priv, int len)
+{
+ /*modified to suit half duplexed spi */
+ struct spi_transfer tt = {
+ .tx_buf = priv->spi_tx_buf,
+ .len = SPI_OPLEN,
+ };
+ struct spi_transfer tr = {
+ .rx_buf = priv->spi_rx_buf,
+ .len = len,
+ };
+ struct spi_message m;
+ int ret;
+
+ spi_message_init(&m);
+
+ spi_message_add_tail(&tt, &m);
+ spi_message_add_tail(&tr, &m);
+
+ ret = spi_sync(priv->spi, &m);
+
+ if (ret) {
+ dev_err(&priv->spi->dev,
+ "spi transfer failed: ret = %d\n", ret);
+ goto out;
+ }
+
+ memcpy(priv->spi_rx_buf, tr.rx_buf, len);
+
+out:
+ return ret;
+}
+
+/*Read data from chip SRAM.*/
+static int enc424j600_read_sram(struct enc424j600_net *priv,
+ u8 *dst, int len, u16 srcaddr, int window)
+{
+ int ret;
+
+ if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0)
+ return -EINVAL;
+
+ /* First set the write pointer as per selected window */
+ if (window == RXWINDOW)
+ priv->spi_tx_buf[0] = WRXRDPT;
+ else if (window == USERWINDOW)
+ priv->spi_tx_buf[0] = WUDARDPT;
+ else if (window == GPWINDOW)
+ priv->spi_tx_buf[0] = WGPRDPT;
+
+ priv->spi_tx_buf[1] = srcaddr & 0xFF;
+ priv->spi_tx_buf[2] = srcaddr >> 8;
+ ret = spi_write(priv->spi, priv->spi_tx_buf, 3);
+
+ /* Transfer the data */
+ if (window == RXWINDOW)
+ priv->spi_tx_buf[0] = RRXDATA;
+ else if (window == USERWINDOW)
+ priv->spi_tx_buf[0] = RUDADATA;
+ else if (window == GPWINDOW)
+ priv->spi_tx_buf[0] = RGPDATA;
+
+ ret = enc424j600_spi_trans(priv, len + 1);
+
+ /* Copy the data from the rx buffer */
+ memcpy(dst, &priv->spi_rx_buf[0], len);
+
+ return ret;
+}
+
+/* Write data to chip SRAM.*/
+static int enc424j600_write_sram(struct enc424j600_net *priv,
+ const u8 *src, int len, u16 dstaddr,
+ int window)
+{
+ int ret;
+
+ if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0)
+ return -EINVAL;
+
+ /* First set the general purpose write pointer */
+ if (window == RXWINDOW)
+ priv->spi_tx_buf[0] = WRXWRPT;
+ else if (window == USERWINDOW)
+ priv->spi_tx_buf[0] = WUDAWRPT;
+ else if (window == GPWINDOW)
+ priv->spi_tx_buf[0] = WGPWRPT;
+
+ priv->spi_tx_buf[1] = dstaddr & 0xFF;
+ priv->spi_tx_buf[2] = dstaddr >> 8;
+ ret = spi_write(priv->spi, priv->spi_tx_buf, 3);
+
+ /* Copy the data to the tx buffer */
+ memcpy(&priv->spi_tx_buf[1], src, len);
+
+ /* Transfer the data */
+ if (window == RXWINDOW)
+ priv->spi_tx_buf[0] = WRXDATA;
+ else if (window == USERWINDOW)
+ priv->spi_tx_buf[0] = WUDADATA;
+ else if (window == GPWINDOW)
+ priv->spi_tx_buf[0] = WGPDATA;
+
+ ret = spi_write(priv->spi, priv->spi_tx_buf, len + 1);
+
+ return ret;
+}
+
+/* Select the current register bank if necessary to be able to read @addr.*/
+static void enc424j600_set_bank(struct enc424j600_net *priv, u8 addr)
+{
+ u8 b = (addr & BANK_MASK) >> BANK_SHIFT;
+
+ /* These registers are present in all banks, no need to switch bank */
+ if (addr >= EUDASTL && addr <= ECON1H)
+ return;
+ if (priv->bank == b)
+ return;
+
+ priv->spi_tx_buf[0] = BXSEL(b);
+
+ enc424j600_spi_trans(priv, 1);
+ priv->bank = b;
+}
+
+/* sets and clears SFR registers */
+static void enc424j600_write_bits(struct enc424j600_net *priv, u8 addr,
+ u8 bits, u8 mask)
+{
+ enc424j600_set_bank(priv, addr);
+ priv->spi_tx_buf[0] = bits;
+ priv->spi_tx_buf[1] = mask;
+ spi_write(priv->spi, priv->spi_tx_buf, 2);
+}
+
+/* Write a 8bit special function register.
+ The @sfr parameters takes address of the register.*/
+static int enc424j600_write_8b_sfr(struct enc424j600_net *priv, u8
sfr, u8 data)
+{
+ int ret;
+
+ enc424j600_set_bank(priv, sfr);
+ priv->spi_tx_buf[0] = WCR(sfr & ADDR_MASK);
+ priv->spi_tx_buf[1] = data & 0xFF;
+ ret = spi_write(priv->spi, priv->spi_tx_buf, 2);
+
+ return ret;
+}
+
+/* Read a 8bit special function register.
+ The @sfr parameters takes address of the register.*/
+static int enc424j600_read_8b_sfr(struct enc424j600_net *priv,
+ u8 sfr, u8 *data)
+{
+ int ret;
+
+ enc424j600_set_bank(priv, sfr);
+ priv->spi_tx_buf[0] = RCR(sfr & ADDR_MASK);
+ ret = enc424j600_spi_trans(priv, 2);
+ *data = priv->spi_rx_buf[0];
+
+ return ret;
+}
+
+/* Write a 16bit special function register.
+ The @sfr parameters takes address of the low byte of the register.
+ Takes care of the endiannes & buffers.*/
+static int enc424j600_write_16b_sfr(struct enc424j600_net *priv,
+ u8 sfr, u16 data)
+{
+ int ret;
+
+ enc424j600_set_bank(priv, sfr);
+ priv->spi_tx_buf[0] = WCR(sfr & ADDR_MASK);
+ priv->spi_tx_buf[1] = data & 0xFF;
+ priv->spi_tx_buf[2] = data >> 8;
+ ret = spi_write(priv->spi, priv->spi_tx_buf, 3);
+ if (ret && netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
+ __func__, ret);
+
+ return ret;
+}
+
+/*Read a 16bit special function register.
+ The @sfr parameters takes address of the low byte of the register.
+ Takes care of the endiannes & buffers. */
+static int enc424j600_read_16b_sfr(struct enc424j600_net *priv,
+ u8 sfr, u16 *data)
+{
+ int ret;
+
+ enc424j600_set_bank(priv, sfr);
+ priv->spi_tx_buf[0] = RCR(sfr & ADDR_MASK);
+ priv->spi_tx_buf[1] = 0;
+ priv->spi_tx_buf[2] = 0;
+ priv->spi_tx_buf[3] = 0;
+ ret = enc424j600_spi_trans(priv, 3);
+ *data = priv->spi_rx_buf[0] | priv->spi_rx_buf[1] << (u16) 8;
+
+ return ret;
+}
+
+static unsigned long msec20_to_jiffies;
+
+/*Wait for bits in register to become equal to @readyMask, but at most 20ms.*/
+static int checktimeout_16bit(struct enc424j600_net *priv,
+ u8 reg, u16 mask, u16 readyMask)
+{
+ unsigned long timeout = jiffies + msec20_to_jiffies;
+ u16 value;
+
+ /* 20 msec timeout read */
+ enc424j600_read_16b_sfr(priv, reg, &value);
+ while ((value & mask) != readyMask) {
+ if (time_after(jiffies, timeout)) {
+ if (netif_msg_drv(priv))
+ dev_dbg(&priv->spi->dev,
+ "reg %02x ready timeout!\n", reg);
+ return -ETIMEDOUT;
+ }
+ cpu_relax();
+ enc424j600_read_16b_sfr(priv, reg, &value);
+ }
+
+ return 0;
+}
+
+/* wait 20 ms for (value&mask) to become readyMask*/
+static int checktimeout_8bit(struct enc424j600_net *priv,
+ u8 reg, u8 mask, u8 readyMask)
+{
+ unsigned long timeout = jiffies + msec20_to_jiffies;
+ u8 value;
+
+ /* 20 msec timeout read */
+ enc424j600_read_8b_sfr(priv, reg, &value);
+ while ((value & mask) != readyMask) {
+ if (time_after(jiffies, timeout)) {
+ if (netif_msg_drv(priv))
+ dev_dbg(&priv->spi->dev,
+ "reg %02x ready timeout!\n", reg);
+ return -ETIMEDOUT;
+ }
+ cpu_relax();
+ enc424j600_read_8b_sfr(priv, reg, &value);
+ }
+
+ return 0;
+}
+
+/* Reset the enc424j600.*/
+static int enc424j600_soft_reset(struct enc424j600_net *priv)
+{
+ int ret;
+ u16 eudast;
+
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
+
+ enc424j600_write_16b_sfr(priv, EUDASTL, EUDAST_TEST_VAL);
+ ret = checktimeout_16bit(priv, EUDASTL, 0xFFFF, EUDAST_TEST_VAL);
+ if (ret != 0)
+ return ret;
+ ret = checktimeout_16bit(priv, ESTATH, CLKRDY, CLKRDY);
+ if (ret != 0)
+ return ret;
+
+ priv->spi_tx_buf[0] = SETETHRST;
+ enc424j600_spi_trans(priv, 1);
+ /*inline with the datasheet */
+ udelay(25);
+
+ enc424j600_read_16b_sfr(priv, EUDASTL, &eudast);
+ if (netif_msg_hw(priv) && eudast != 0)
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() EUDASTL is not zero!\n", __func__);
+ /*inline with the datasheet */
+ /*datasheet says to wait for 256 usec atleast */
+ udelay(300);
+ return 0;
+}
+
+/*
+ * PHY register read
+ * PHY registers are not accessed directly, but through the MII
+ */
+static int enc424j600_phy_read(struct enc424j600_net *priv,
+ u16 address, u16 *data)
+{
+ int ret;
+
+ enc424j600_write_16b_sfr(priv, MIREGADRL,
+ address | (MIREGADRH_VAL << 8));
+ enc424j600_write_16b_sfr(priv, MICMDL, MIIRD);
+ udelay(26);
+ ret = !checktimeout_8bit(priv, MISTATL, BUSY, 0);
+ enc424j600_write_16b_sfr(priv, MICMDL, 0);
+ enc424j600_read_16b_sfr(priv, MIRDL, data);
+ return ret;
+}
+
+static int enc424j600_phy_write(struct enc424j600_net *priv, u16 address,
+ u16 data)
+{
+ enc424j600_write_16b_sfr(priv, MIREGADRL,
+ address | (MIREGADRH_VAL << 8));
+ enc424j600_write_16b_sfr(priv, MIWRL, data);
+ udelay(26);
+ return !checktimeout_8bit(priv, MISTATL, BUSY, 0);
+}
+
+/* Read the hardware MAC address to dev->dev_addr. */
+static int enc424j600_get_hw_macaddr(struct net_device *ndev)
+{
+ struct enc424j600_net *priv = netdev_priv(ndev);
+ u16 maadr1, maadr2, maadr3;
+
+ mutex_lock(&priv->lock);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_INFO DRV_NAME
+ ": %s: Setting MAC address to %pM\n",
+ ndev->name, ndev->dev_addr);
+
+ enc424j600_read_16b_sfr(priv, MAADR3L, &maadr3);
+ ndev->dev_addr[5] = maadr3 >> 8;
+ ndev->dev_addr[4] = maadr3 & 0xff;
+ enc424j600_read_16b_sfr(priv, MAADR2L, &maadr2);
+ ndev->dev_addr[3] = maadr2 >> 8;
+ ndev->dev_addr[2] = maadr2 & 0xff;
+ enc424j600_read_16b_sfr(priv, MAADR1L, &maadr1);
+ ndev->dev_addr[1] = maadr1 >> 8;
+ ndev->dev_addr[0] = maadr1 & 0xff;
+
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+/* Program the hardware MAC address from dev->dev_addr.*/
+static int enc424j600_set_hw_macaddr(struct net_device *ndev)
+{
+ struct enc424j600_net *priv = netdev_priv(ndev);
+
+ mutex_lock(&priv->lock);
+
+ if (priv->hw_enable) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() Hardware must be disabled to set "
+ "Mac address\n", __func__);
+ mutex_unlock(&priv->lock);
+ return -EBUSY;
+ }
+
+ if (netif_msg_drv(priv))
+ printk(KERN_INFO DRV_NAME
+ ": %s: Setting MAC address to %pM\n",
+ ndev->name, ndev->dev_addr);
+
+ enc424j600_write_16b_sfr(priv, MAADR3L,
+ ndev->dev_addr[4] | ndev->dev_addr[5] << 8);
+ enc424j600_write_16b_sfr(priv, MAADR2L,
+ ndev->dev_addr[2] | ndev->dev_addr[3] << 8);
+ enc424j600_write_16b_sfr(priv, MAADR1L,
+ ndev->dev_addr[0] | ndev->dev_addr[1] << 8);
+
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+/* Store the new hardware address in dev->dev_addr, and update the MAC.*/
+static int enc424j600_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 enc424j600_set_hw_macaddr(dev);
+}
+
+u8 nolock_regb_read(struct enc424j600_net *priv, u8 address)
+{
+ u8 data;
+
+ enc424j600_read_8b_sfr(priv, address, &data);
+ return data;
+}
+
+u16 nolock_regw_read(struct enc424j600_net *priv, u8 address)
+{
+ u16 data;
+
+ enc424j600_read_16b_sfr(priv, address, &data);
+ return data;
+}
+
+/*Debug routine to dump useful register contents*/
+static void enc424j600_dump_regs(struct enc424j600_net *priv, const char *msg)
+{
+ mutex_lock(&priv->lock);
+ printk(KERN_DEBUG DRV_NAME " %s\n"
+ "Cntrl: ECON1H ECON1L ECON2H ECON2L ESTATH ESTATL EIRH "
+ "EIRL EIEH EIEL\n"
+ " 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x "
+ "0x%02x 0x%02x 0x%02x 0x%02x\n"
+ "MAC : MACON1 MACON2\n"
+ " 0x%04x 0x%04x\n"
+ "Rx : ERXST ERXTAIL ERXHEAD ERXWRPT ERXRDPT ERXFCON MAMXFL\n"
+ " 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x 0x%04x\n"
+ "Tx : ETXST ETXLEN MACLCON1 \n"
+ " 0x%04x 0x%04x 0x%02x\n",
+ msg,
+ nolock_regb_read(priv, ECON1H), nolock_regb_read(priv, ECON1L),
+ nolock_regb_read(priv, ECON2H), nolock_regb_read(priv, ECON2L),
+ nolock_regb_read(priv, ESTATH), nolock_regb_read(priv, ESTATL),
+ nolock_regb_read(priv, EIRH), nolock_regb_read(priv, EIRL),
+ nolock_regb_read(priv, EIEH), nolock_regb_read(priv, EIEL),
+ nolock_regw_read(priv, MACON1L), nolock_regw_read(priv, MACON2L),
+ nolock_regw_read(priv, ERXSTL), nolock_regw_read(priv, ERXTAILL),
+ nolock_regw_read(priv, ERXHEADL),
+ nolock_regw_read(priv, ERXWRPTL), nolock_regw_read(priv,
+ ERXRDPTL),
+ nolock_regw_read(priv, ERXFCONL), nolock_regw_read(priv,
+ MAMXFLL),
+ nolock_regw_read(priv, ETXSTL), nolock_regw_read(priv, ETXLENL),
+ nolock_regw_read(priv, MACLCONL));
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * TODO: Check the functionality
+ * Low power mode shrinks power consumption about 100x, so we'd like
+ * the chip to be in that mode whenever it's inactive. (However, we
+ * can't stay in lowpower mode during suspend with WOL active.)
+ */
+static void enc424j600_lowpower(struct enc424j600_net *priv, bool is_low)
+{
+
+ if (netif_msg_drv(priv))
+ dev_dbg(&priv->spi->dev, "%s power...\n",
+ is_low ? "low" : "high");
+
+#if 0
+ mutex_lock(&priv->lock);
+ if (is_low) {
+ nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
+ checktimeout_8bit(priv, ESTAT, ESTAT_RXBUSY, 0);
+ checktimeout_8bit(priv, ECON1, ECON1_TXRTS, 0);
+ /* ECON2_VRPS was set during initialization */
+ nolock_reg_bfset(priv, ECON2, ECON2_PWRSV);
+ } else {
+ nolock_reg_bfclr(priv, ECON2, ECON2_PWRSV);
+ checktimeout_8bit(priv, ESTAT, ESTAT_CLKRDY, ESTAT_CLKRDY);
+ /* caller sets ECON1_RXEN */
+ }
+ mutex_unlock(&priv->lock);
+#endif
+}
+
+static unsigned long msec2000_to_jiffies;
+/* Waits for autonegotiation to complete. */
+static int enc424j600_wait_for_autoneg(struct enc424j600_net *priv)
+{
+ unsigned long timeout = jiffies + msec2000_to_jiffies;
+ u16 value;
+
+ /* 20 msec timeout read */
+ enc424j600_phy_read(priv, PHSTAT1, &value);
+ while ((value & ANDONE) == 0) {
+ if (time_after(jiffies, timeout)) {
+ if (netif_msg_drv(priv))
+ dev_dbg(&priv->spi->dev,
+ "reg %02x ready timeout!\n", PHSTAT1);
+ return -ETIMEDOUT;
+ }
+ cpu_relax();
+ enc424j600_phy_read(priv, PHSTAT1, &value);
+ }
+ return 0;
+}
+
+/*
+ * Reset and initialize the chip, but don't enable interrupts and don't
+ * start receiving yet.
+ */
+static int enc424j600_hw_init(struct enc424j600_net *priv)
+{
+ u8 eidledl;
+ u16 phcon1;
+ u16 macon2;
+ u16 econ1l;
+
+ /*priv->autoneg = AUTONEG_ENABLE; */
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() - %s\n", __func__,
+ priv->autoneg ? "Autoneg" : (priv->
+ full_duplex ? "FullDuplex" : "HalfDuplex"));
+
+ mutex_lock(&priv->lock);
+
+ priv->bank = 0;
+ priv->hw_enable = false;
+ priv->tx_retry_count = 0;
+ priv->max_pk_counter = 0;
+ priv->rxfilter = RXFILTER_NORMAL;
+
+ if (enc424j600_soft_reset(priv) != 0)
+ return 0;
+
+ /* Check the device id and silicon revision id. */
+ enc424j600_read_8b_sfr(priv, EIDLEDL, &eidledl);
+
+ if ((eidledl & DEVID_MASK) >> DEVID_SHIFT != ENC424J600_DEV_ID) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": %s() Invalid device ID: %d\n", __func__,
+ (eidledl & DEVID_MASK) >> DEVID_SHIFT);
+ return 0;
+ }
+
+ if (netif_msg_drv(priv))
+ printk(KERN_INFO DRV_NAME ": Silicon revision ID: 0x%02x\n",
+ (eidledl & REVID_MASK) >> REVID_SHIFT);
+
+ enc424j600_write_16b_sfr(priv, ETXSTL, TXSTART);
+ enc424j600_write_16b_sfr(priv, ERXSTL, RXSTART);
+
+ priv->next_pk_ptr = RXSTART;
+ enc424j600_write_16b_sfr(priv, ERXTAILL, SRAMSIZE - 2);
+ enc424j600_write_16b_sfr(priv, ERXFCONL, UCEN | BCEN | CRCEN | RUNTEN);
+
+ enc424j600_phy_write(priv, PHANA, PHANA_DEFAULT);
+
+ /* PHCON1 */
+ phcon1 = 0;
+ if (priv->autoneg) {
+ /* Enable autonegotiation and renegotiate */
+ phcon1 |= ANEN | RENEG;
+ } else {
+ if (priv->speed100)
+ phcon1 |= SPD100;
+ if (priv->full_duplex)
+ phcon1 |= PFULDPX;
+ }
+ enc424j600_phy_write(priv, PHCON1, phcon1);
+
+ /* MACON2
+ * defer transmission if collision occurs (only for half duplex)
+ * pad to 60 or 64 bytes and append CRC
+ * enable receiving huge frames (instead of limiting packet size) */
+ macon2 = MACON2_DEFER | PADCFG2 | PADCFG0 | TXCRCEN | HFRMEN;
+
+ /* If autonegotiation is enabled, we have to wait untill it finishes
+ * and set the PHYDPX bit in MACON2 correctly */
+ if (priv->autoneg) {
+ u8 estath;
+ if (!enc424j600_wait_for_autoneg(priv)) {
+ /* read the PHYDPX bit in ESTAT and set FULDPX in
+ MACON2 accordingly */
+ enc424j600_read_8b_sfr(priv, ESTATH, &estath);
+ if (estath & PHYDPX)
+ macon2 |= FULDPX;
+ } else /*if timedout, just disable autoneg */
+ priv->autoneg = AUTONEG_DISABLE;
+ } else if (priv->full_duplex)
+ macon2 |= FULDPX;
+
+ enc424j600_write_16b_sfr(priv, MACON2L, macon2);
+
+ /* MAIPGL
+ * Recomended values for inter packet gaps */
+ if (!priv->autoneg) {
+ enc424j600_write_16b_sfr(priv, MAIPGL,
+ MAIPGL_VAL | (MAIPGH_VAL << 8));
+ }
+
+ /*
+ * Select enabled interrupts, but don't set the global
+ * interrupt enable flag.
+ */
+
+ enc424j600_write_16b_sfr(priv, EIEL,
+ LINKIE << 8 | PKTIE | DMAIE | TXIE | TXABTIE |
+ RXABTIE);
+
+ enc424j600_read_16b_sfr(priv, ECON1L, &econ1l);
+ econ1l |= (RXEN);
+ enc424j600_write_16b_sfr(priv, ECON1L, econ1l);
+
+ mutex_unlock(&priv->lock);
+
+ if (netif_msg_hw(priv))
+ enc424j600_dump_regs(priv, "Hw initialized.");
+
+ return 1;
+}
+
+static void enc424j600_hw_enable(struct enc424j600_net *priv)
+{
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enabling interrupts.\n",
+ __func__);
+
+ mutex_lock(&priv->lock);
+
+ /* Clear any pending interrupts */
+ enc424j600_write_16b_sfr(priv, EIRL, 0);
+
+ /* Enable global interrupt flag */
+ enc424j600_write_bits(priv, EIEH, BFS(EIEH), INTIE);
+
+ /* enable receive logic */
+ enc424j600_write_bits(priv, ECON1L, BFS(ECON1L), RXEN);
+ priv->hw_enable = true;
+ mutex_unlock(&priv->lock);
+}
+
+static void enc424j600_hw_disable(struct enc424j600_net *priv)
+{
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() disabling interrupts.\n",
+ __func__);
+
+ mutex_lock(&priv->lock);
+
+ /* disable receive logic */
+ enc424j600_write_bits(priv, ECON1L, BFC(ECON1L), RXEN);
+
+ /* Disable global interrupt flag */
+ enc424j600_write_bits(priv, EIEH, BFC(EIEH), INTIE);
+
+ priv->hw_enable = false;
+
+ mutex_unlock(&priv->lock);
+}
+
+static int
+enc424j600_setlink(struct net_device *ndev, u8 autoneg, u16 speed, u8 duplex)
+{
+ struct enc424j600_net *priv = netdev_priv(ndev);
+ int ret = 0;
+
+ if (!priv->hw_enable) {
+ /* link is in low power mode now; duplex setting
+ * will take effect on next enc424j600_hw_init().
+ */
+ if (speed == SPEED_10 || speed == SPEED_100) {
+ priv->autoneg = (autoneg == AUTONEG_ENABLE);
+ priv->full_duplex = (duplex == DUPLEX_FULL);
+ priv->speed100 = (speed == SPEED_100);
+ } else {
+ if (netif_msg_link(priv))
+ dev_warn(&ndev->dev,
+ "unsupported link setting\n");
+ /*speeds other than SPEED_10 and SPEED_100 */
+ /*are not supported by chip */
+ 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;
+}
+
+/*
+ * Receive Status vector
+ */
+static void enc424j600_dump_rsv(struct enc424j600_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_ALERT ": %s - packet len:%d\n", msg, len);
+ print_hex_dump(KERN_ALERT, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1,
+ data, len, true);
+}
+
+/*
+ * Calculate wrap around when reading beyond the end of the RX buffer
+ */
+static u16 rx_packet_start(u16 ptr)
+{
+ if (ptr + RSV_SIZE > RXEND_INIT)
+ return (ptr + RSV_SIZE) - (RXEND_INIT - RXSTART + 1);
+ else
+ return ptr + RSV_SIZE;
+}
+
+/*
+ * 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 enc424j600_net *priv, u16 start, u16 end)
+{
+ u16 erxrdpt;
+
+ if (start > 0x5FFF || end > 0x5FFF || start > end) {
+ if (netif_msg_drv(priv))
+ printk(KERN_ERR DRV_NAME ": %s(%d, %d) RXFIFO "
+ "bad parameters!\n", __func__, start, end);
+ return;
+ }
+ /* set receive buffer start + end */
+ priv->next_pk_ptr = start;
+ enc424j600_write_16b_sfr(priv, ERXSTL, start);
+ erxrdpt = erxrdpt_workaround(priv->next_pk_ptr, start, end);
+ enc424j600_write_16b_sfr(priv, ERXRDPTL, erxrdpt);
+ enc424j600_write_16b_sfr(priv, ERXTAILL, end);
+}
+
+/*
+ * 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 enc424j600_hw_rx(struct net_device *ndev)
+{
+ struct enc424j600_net *priv = netdev_priv(ndev);
+ struct sk_buff *skb = NULL;
+ u16 erxrdpt, next_packet, rxstat;
+ u8 pkcnt;
+ u16 head, tail;
+ u8 rsv[RSV_SIZE];
+ u16 newrxtail;
+ 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",
+ __func__, priv->next_pk_ptr);
+ mutex_lock(&priv->lock);
+ enc424j600_write_bits(priv, ECON1L, BFC(ECON1L), RXEN);
+ enc424j600_write_bits(priv, ECON2L, BFS(ECON2L), RXRST);
+ enc424j600_write_bits(priv, ECON2L, BFC(ECON2L), RXRST);
+ nolock_rxfifo_init(priv, RXSTART, RXEND_INIT);
+ enc424j600_write_bits(priv, EIRL, BFC(EIRL), RXABTIF);
+ enc424j600_write_bits(priv, ECON1L, BFS(ECON1L), RXEN);
+ mutex_unlock(&priv->lock);
+ ndev->stats.rx_errors++;
+ return;
+ }
+
+ /* Read next packet pointer and rx status vector */
+ enc424j600_read_sram(priv, rsv, sizeof(rsv), priv->next_pk_ptr,
+ RXWINDOW);
+
+ 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))
+ enc424j600_dump_rsv(priv, __func__, next_packet, len, rxstat);
+
+ if (!RSV_GETBIT(rxstat, RSV_RXOK) || len > MAX_FRAMELEN) {
+ 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++;
+ if (len > MAX_FRAMELEN)
+ ndev->stats.rx_over_errors++;
+ } else {
+ skb = dev_alloc_skb(len + NET_IP_ALIGN);
+ 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;
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ /* copy the packet from the receive buffer */
+ enc424j600_read_sram(priv, skb_put(skb, len), len,
+ rx_packet_start(priv->next_pk_ptr),
+ RXWINDOW);
+
+ if (netif_msg_pktdata(priv))
+ dump_packet(__func__, skb->len, skb->data);
+ skb->protocol = eth_type_trans(skb, ndev);
+ /* update statistics */
+ ndev->stats.rx_packets++;
+ ndev->stats.rx_bytes += len;
+ netif_rx_ni(skb);
+ }
+ }
+ newrxtail = next_packet - 2;
+ if (next_packet == RXSTART)
+ newrxtail = SRAMSIZE - 2;
+
+ enc424j600_write_16b_sfr(priv, ERXTAILL, newrxtail);
+ /*
+ * 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, RXEND_INIT);
+ if (netif_msg_hw(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT:0x%04x\n", __func__,
+ erxrdpt);
+
+ /*TODO: remove mutex_lock wherever not required */
+ mutex_lock(&priv->lock);
+ enc424j600_write_16b_sfr(priv, ERXRDPTL, erxrdpt);
+
+ priv->next_pk_ptr = next_packet;
+ enc424j600_read_8b_sfr(priv, ESTATL, &pkcnt);
+ enc424j600_read_16b_sfr(priv, ERXHEADL, &head);
+ enc424j600_read_16b_sfr(priv, ERXTAILL, &tail);
+ /* we are done with this packet, decrement the packet counter */
+ enc424j600_write_bits(priv, ECON1H, BFS(ECON1H), PKTDEC);
+
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Access the PHY to determine link status
+ */
+static void enc424j600_check_link_status(struct enc424j600_net *priv)
+{
+ u8 estath;
+ u16 macon2;
+
+ enc424j600_read_8b_sfr(priv, ESTATH, &estath);
+ if (estath & PHYLNK) {
+ if (priv->autoneg) {
+ if (!enc424j600_wait_for_autoneg(priv)) {
+ if (estath & PHYDPX) {
+ printk(KERN_ALERT "Full Duplex");
+ enc424j600_read_16b_sfr(priv, MACON2L,
+ &macon2);
+ macon2 |= FULDPX;
+ enc424j600_write_16b_sfr(priv, MACON2L,
+ macon2);
+ }
+ } else /*if timed out, disable autoneg and continue */
+ priv->autoneg = AUTONEG_DISABLE;
+ }
+ netif_carrier_on(priv->netdev);
+ if (netif_msg_ifup(priv))
+ dev_info(&(priv->netdev->dev), "link up\n");
+ } else {
+ if (netif_msg_ifdown(priv))
+ dev_info(&(priv->netdev->dev), "link down\n");
+ netif_carrier_off(priv->netdev);
+ }
+}
+
+static void enc424j600_tx_clear(struct enc424j600_net *priv, bool err)
+{
+ struct net_device *ndev = priv->netdev;
+
+ 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;
+ }
+
+ netif_wake_queue(ndev);
+}
+
+static int enc424j600_int_rx_abbort_handler(struct enc424j600_net *priv,
+ int loop)
+{
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": intRXAbt(%d)\n", loop);
+ mutex_lock(&priv->lock);
+ priv->netdev->stats.rx_dropped++;
+ enc424j600_write_bits(priv, EIRL, BFC(EIRL), RXABTIF);
+ mutex_unlock(&priv->lock);
+
+ return loop;
+}
+
+static int enc424j600_int_link_handler(struct enc424j600_net *priv, int loop)
+{
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": intLINK(%d)\n", loop);
+
+ /* we check more than is necessary here --
+ * only PHYLNK would be needed. */
+ enc424j600_check_link_status(priv);
+
+ return loop;
+}
+
+static int enc424j600_int_tx_handler(struct enc424j600_net *priv, int loop)
+{
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": intTX(%d)\n", loop);
+
+ mutex_lock(&priv->lock);
+ enc424j600_tx_clear(priv, false);
+ enc424j600_write_bits(priv, EIRL, BFC(EIRL), TXIF);
+ mutex_unlock(&priv->lock);
+
+ return loop;
+}
+
+static int enc424j600_int_tx_err_handler(struct enc424j600_net *priv, int loop)
+{
+ u8 etxstat;
+
+ loop++;
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": intTXErr(%d)\n", loop);
+
+ mutex_lock(&priv->lock);
+
+ enc424j600_read_8b_sfr(priv, ETXSTATH, &etxstat);
+
+ if (etxstat & LATECOL) {
+ if (netif_msg_tx_err(priv))
+ printk(KERN_DEBUG DRV_NAME
+ ": Late collision TXErr (%d)\n",
+ priv->tx_retry_count);
+ if (priv->tx_retry_count++ < MAX_TX_RETRYCOUNT)
+ enc424j600_write_bits(priv, ECON1L, BFS(ECON1L), TXRTS);
+ else
+ enc424j600_tx_clear(priv, true);
+ } else if (etxstat & MAXCOL) {
+ if (netif_msg_tx_err(priv))
+ printk(KERN_DEBUG DRV_NAME ": Max collisions TXErr\n");
+ enc424j600_tx_clear(priv, true);
+ } else {
+ enc424j600_tx_clear(priv, true);
+ }
+
+ mutex_unlock(&priv->lock);
+
+ return loop;
+}
+
+static int enc424j600_int_received_packet_handler(struct enc424j600_net *priv)
+{
+ uint8_t pk_counter;
+ int ret;
+
+ enc424j600_read_8b_sfr(priv, ESTATL, &pk_counter);
+ 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)
+ enc424j600_hw_rx(priv->netdev);
+ return ret;
+}
+
+static void enc424j600_irq_work_handler(struct work_struct *work)
+{
+
+ struct enc424j600_net *priv =
+ container_of(work, struct enc424j600_net, irq_work);
+ int loop;
+
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
+
+ /* disable further interrupts */
+ enc424j600_write_bits(priv, EIEH, BFC(EIEH), INTIE);
+
+ do {
+ u16 intflags;
+ enc424j600_read_16b_sfr(priv, EIRL, &intflags);
+ loop = 0;
+
+ /* LINK changed handler */
+ if ((intflags & LINKIF) != 0)
+ loop = enc424j600_int_link_handler(priv, loop);
+
+ /* TX complete handler */
+ if ((intflags & TXIF) != 0)
+ loop = enc424j600_int_tx_handler(priv, loop);
+
+ /* TX Error handler */
+ if ((intflags & TXABTIF) != 0) {
+ printk(KERN_ALERT "ABORTING TRANSMITTING PACKET");
+ loop = enc424j600_int_tx_err_handler(priv, loop);
+ }
+ /* RX Error handler */
+ if ((intflags & RXABTIF) != 0) {
+ printk(KERN_ALERT "ABORTING RECEIVED PACKET");
+ loop = enc424j600_int_rx_abbort_handler(priv, loop);
+ }
+ /* RX handler */
+ if ((intflags & PKTIF) != 0)
+ loop = enc424j600_int_received_packet_handler(priv);
+ enc424j600_write_bits(priv, EIRL, BFC(EIRL), intflags && 0xff);
+ enc424j600_write_bits(priv, EIRH, BFC(EIRH), intflags >> 8);
+ } while (loop);
+ /* re-enable interrupts */
+ enc424j600_write_bits(priv, EIEH, BFS(EIEH), INTIE);
+
+ if (netif_msg_intr(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() exit\n", __func__);
+}
+
+void locked_reg_bfset(struct enc424j600_net *priv, u8 addr, u8 mask)
+{
+ mutex_lock(&priv->lock);
+ enc424j600_write_bits(priv, addr, BFS(addr), mask);
+ mutex_unlock(&priv->lock);
+}
+
+/*
+ * Hardware transmit function.
+ * Fill the buffer memory and send the contents of the transmit buffer
+ * onto the network
+ */
+static void enc424j600_hw_tx(struct enc424j600_net *priv)
+{
+ if (!priv->tx_skb) {
+ enc424j600_tx_clear(priv, false);
+ return;
+ }
+
+ 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(__func__, priv->tx_skb->len, priv->tx_skb->data);
+
+ enc424j600_write_sram(priv, priv->tx_skb->data, priv->tx_skb->len,
+ TXSTART, GPWINDOW);
+
+ /* Set the tx pointer to start of general purpose SRAM area */
+ enc424j600_write_16b_sfr(priv, ETXSTL, TXSTART);
+
+ /* Write the transfer length */
+ enc424j600_write_16b_sfr(priv, ETXLENL, priv->tx_skb->len);
+
+ /* set TX request flag */
+ locked_reg_bfset(priv, ECON1L, TXRTS);
+}
+
+static int enc424j600_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ if (netif_msg_tx_queued(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
+
+ /* 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 NETDEV_TX_OK;
+}
+
+static void enc424j600_tx_work_handler(struct work_struct *work)
+{
+ struct enc424j600_net *priv =
+ container_of(work, struct enc424j600_net, tx_work);
+
+ /* actual delivery of data */
+ enc424j600_hw_tx(priv);
+}
+
+static irqreturn_t enc424j600_irq(int irq, void *dev_id)
+{
+ struct enc424j600_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 enc424j600 registers through SPI bus
+ * via spi_sync() call.
+ */
+ schedule_work(&priv->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static void enc424j600_tx_timeout(struct net_device *ndev)
+{
+ struct enc424j600_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 enc424j600_net_open(struct net_device *dev)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
+
+ if (!is_valid_ether_addr(dev->dev_addr)) {
+ if (netif_msg_ifup(priv))
+ dev_err(&dev->dev, "invalid MAC address %pM\n",
+ dev->dev_addr);
+ return -EADDRNOTAVAIL;
+ }
+ /* Reset the hardware here (and take it out of low power mode) */
+ enc424j600_lowpower(priv, false);
+ enc424j600_hw_disable(priv);
+ if (!enc424j600_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) */
+ enc424j600_set_hw_macaddr(dev);
+ /* Enable interrupts */
+ enc424j600_hw_enable(priv);
+ /* check link status */
+ enc424j600_check_link_status(priv);
+ /* 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 enc424j600_net_close(struct net_device *dev)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
+
+ enc424j600_hw_disable(priv);
+ enc424j600_lowpower(priv, true);
+ 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 enc424j600_set_multicast_list(struct net_device *dev)
+{
+ struct enc424j600_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);
+}
+
+void locked_regb_write(struct enc424j600_net *priv, u8 address, u8 data)
+{
+ mutex_lock(&priv->lock);
+ enc424j600_write_8b_sfr(priv, address, data);
+ mutex_unlock(&priv->lock);
+}
+
+static void enc424j600_setrx_work_handler(struct work_struct *work)
+{
+ u16 macon1;
+ struct enc424j600_net *priv =
+ container_of(work, struct enc424j600_net, setrx_work);
+
+ if (priv->rxfilter == RXFILTER_PROMISC) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": promiscuous mode\n");
+ enc424j600_read_16b_sfr(priv, MACON1L, &macon1);
+ macon1 = macon1 | PASSALL;
+ enc424j600_write_16b_sfr(priv, MACON1L, macon1);
+ locked_regb_write(priv, ERXFCONL, UCEN | MCEN | NOTMEEN);
+ } else if (priv->rxfilter == RXFILTER_MULTI) {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": multicast mode\n");
+ locked_regb_write(priv, ERXFCONL, UCEN | CRCEN | BCEN | MCEN);
+ } else {
+ if (netif_msg_drv(priv))
+ printk(KERN_DEBUG DRV_NAME ": normal mode\n");
+ locked_regb_write(priv, ERXFCONL, UCEN | CRCEN | BCEN);
+ }
+}
+
+static void enc424j600_restart_work_handler(struct work_struct *work)
+{
+ struct enc424j600_net *priv =
+ container_of(work, struct enc424j600_net, restart_work);
+ struct net_device *ndev = priv->netdev;
+ int ret;
+
+ rtnl_lock();
+ if (netif_running(ndev)) {
+ enc424j600_net_close(ndev);
+ ret = enc424j600_net_open(ndev);
+ if (unlikely(ret)) {
+ dev_info(&ndev->dev, " could not restart %d\n", ret);
+ dev_close(ndev);
+ }
+ }
+ rtnl_unlock();
+}
+
+/* ......................... ETHTOOL SUPPORT ........................... */
+static int enc424j600_get_regs_len(struct net_device *dev)
+{
+ return SFR_REG_COUNT;
+}
+
+static void
+enc424j600_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_name(dev->dev.parent), sizeof(info->bus_info));
+}
+
+static int
+enc424j600_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ cmd->transceiver = XCVR_INTERNAL;
+ cmd->supported = SUPPORTED_10baseT_Half
+ | SUPPORTED_10baseT_Full
+ | SUPPORTED_100baseT_Half
+ | SUPPORTED_100baseT_Full
+ | SUPPORTED_TP;
+
+ cmd->speed = priv->speed100 ? SPEED_100 : SPEED_10;
+ cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF;
+ cmd->port = PORT_TP;
+ cmd->autoneg = priv->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
+
+ return 0;
+}
+
+static int
+enc424j600_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ return enc424j600_setlink(dev, cmd->autoneg, cmd->speed, cmd->duplex);
+}
+
+static u32 enc424j600_get_msglevel(struct net_device *dev)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ return priv->msg_enable;
+}
+
+static void enc424j600_set_msglevel(struct net_device *dev, u32 val)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ priv->msg_enable = val;
+}
+
+static void enc424j600_get_regs(struct net_device *dev,
+ struct ethtool_regs *regs, void *p)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+ u8 *buff = p;
+ u8 addroffset;
+
+ regs->version = 1;
+ mutex_lock(&priv->lock);
+ for (addroffset = 0; addroffset < SFR_REG_COUNT; addroffset++) {
+ switch (addroffset) {
+ /*skip reading reserved regs */
+ case 0x4C:
+ case 0x4D:
+ case 0x4E:
+ case 0x4F:
+ case 0x50:
+ case 0x51:
+ case 0x81:
+ case 0x83:
+ case 0x85:
+ case 0x92:
+ case 0x93:
+ case 0x94:
+ case 0x95:
+ case 0x96:
+ case 0x97:
+ case 0x98:
+ case 0x99:
+ case 0x9A:
+ case 0x9B:
+ case 0x9C:
+ case 0x9D:
+ case 0x9E:
+ case 0x9F:
+ buff[addroffset] = 0;
+ break;
+ default:
+ buff[addroffset] = nolock_regb_read(priv, addroffset);
+ break;
+ }
+ }
+ mutex_unlock(&priv->lock);
+}
+
+static const struct ethtool_ops enc424j600_ethtool_ops = {
+ .get_settings = enc424j600_get_settings,
+ .set_settings = enc424j600_set_settings,
+ .get_drvinfo = enc424j600_get_drvinfo,
+ .get_msglevel = enc424j600_get_msglevel,
+ .set_msglevel = enc424j600_set_msglevel,
+ .get_regs_len = enc424j600_get_regs_len,
+ .get_regs = enc424j600_get_regs,
+};
+
+static int enc424j600_chipset_init(struct net_device *dev)
+{
+ struct enc424j600_net *priv = netdev_priv(dev);
+
+ enc424j600_get_hw_macaddr(dev);
+ return enc424j600_hw_init(priv);
+}
+
+static const struct net_device_ops enc424j600_netdev_ops = {
+ .ndo_open = enc424j600_net_open,
+ .ndo_stop = enc424j600_net_close,
+ .ndo_start_xmit = enc424j600_send_packet,
+ .ndo_set_multicast_list = enc424j600_set_multicast_list,
+ .ndo_set_mac_address = enc424j600_set_mac_address,
+ .ndo_tx_timeout = enc424j600_tx_timeout,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int __devinit enc424j600_probe(struct spi_device *spi)
+{
+ struct net_device *dev;
+ struct enc424j600_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 enc424j600_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->spi = spi;
+ priv->msg_enable = netif_msg_init(debug.msg_enable,
+ ENC424J600_MSG_DEFAULT);
+ mutex_init(&priv->lock);
+ INIT_WORK(&priv->tx_work, enc424j600_tx_work_handler);
+ INIT_WORK(&priv->setrx_work, enc424j600_setrx_work_handler);
+ INIT_WORK(&priv->irq_work, enc424j600_irq_work_handler);
+ INIT_WORK(&priv->restart_work, enc424j600_restart_work_handler);
+ dev_set_drvdata(&spi->dev, priv);
+ SET_NETDEV_DEV(dev, &spi->dev);
+ /*TODO: chip DMA features to be utilized */
+ /* If requested, allocate DMA buffers */
+ if (enc424j600_enable_dma) {
+ spi->dev.coherent_dma_mask = ~0;
+
+ /*
+ * Minimum coherent DMA allocation is PAGE_SIZE, so allocate
+ * that much and share it between Tx and Rx DMA buffers.
+ */
+#if SPI_TRANSFER_BUF_LEN > PAGE_SIZE / 2
+#error "A problem in DMA buffer allocation"
+#endif
+ priv->spi_tx_buf = dma_alloc_coherent(&spi->dev,
+ PAGE_SIZE,
+ &priv->spi_tx_dma,
+ GFP_DMA);
+
+ if (priv->spi_tx_buf) {
+ priv->spi_rx_buf = (u8 *) (priv->spi_tx_buf +
+ (PAGE_SIZE / 2));
+ priv->spi_rx_dma = (dma_addr_t) (priv->spi_tx_dma +
+ (PAGE_SIZE / 2));
+ } else {
+ /* Fall back to non-DMA */
+ enc424j600_enable_dma = 0;
+ }
+ }
+
+ /* Allocate non-DMA buffers */
+ if (!enc424j600_enable_dma) {
+ priv->spi_tx_buf = kmalloc(SPI_TRANSFER_BUF_LEN, GFP_KERNEL);
+ if (!priv->spi_tx_buf) {
+ ret = -ENOMEM;
+ goto error_tx_buf;
+ }
+ priv->spi_rx_buf = kmalloc(SPI_TRANSFER_BUF_LEN, GFP_KERNEL);
+ if (!priv->spi_rx_buf) {
+ ret = -ENOMEM;
+ goto error_rx_buf;
+ }
+ }
+
+ if (!enc424j600_chipset_init(dev)) {
+ if (netif_msg_probe(priv))
+ dev_info(&spi->dev, DRV_NAME " chip not found\n");
+ ret = -EIO;
+ goto error_irq;
+ }
+
+ /* Board setup must set the relevant edge trigger type;
+ * level triggers won't currently work.
+ */
+ ret = request_irq(spi->irq, enc424j600_irq, 0, 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->netdev_ops = &enc424j600_netdev_ops;
+ dev->watchdog_timeo = TX_TIMEOUT;
+ SET_ETHTOOL_OPS(dev, &enc424j600_ethtool_ops);
+
+ enc424j600_lowpower(priv, true);
+
+ 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 ret;
+
+error_register:
+ free_irq(spi->irq, priv);
+error_irq:
+ free_netdev(dev);
+ if (!enc424j600_enable_dma)
+ kfree(priv->spi_rx_buf);
+error_rx_buf:
+ if (!enc424j600_enable_dma)
+ kfree(priv->spi_tx_buf);
+error_tx_buf:
+ if (enc424j600_enable_dma) {
+ dma_free_coherent(&spi->dev, PAGE_SIZE,
+ priv->spi_tx_buf, priv->spi_tx_dma);
+ }
+error_alloc:
+ return ret;
+}
+
+static int __devexit enc424j600_remove(struct spi_device *spi)
+{
+ struct enc424j600_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 enc424j600_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = enc424j600_probe,
+ .remove = __devexit_p(enc424j600_remove),
+};
+
+static int __init enc424j600_init(void)
+{
+ msec20_to_jiffies = msecs_to_jiffies(20);
+ /*autoneg works from 1600ms */
+ msec2000_to_jiffies = msecs_to_jiffies(2000);
+
+ return spi_register_driver(&enc424j600_driver);
+}
+
+module_init(enc424j600_init);
+
+static void __exit enc424j600_exit(void)
+{
+ spi_unregister_driver(&enc424j600_driver);
+}
+
+module_exit(enc424j600_exit);
+
+MODULE_DESCRIPTION(DRV_NAME " ethernet driver");
+MODULE_AUTHOR("Balaji Venkatachalam <balaji.v@...takaa.com>");
+MODULE_LICENSE("GPL");
+module_param_named(debug, debug.msg_enable, int, 0);
+MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., ffff=all)");
+module_param(enc424j600_enable_dma, int, S_IRUGO);
+MODULE_PARM_DESC(enc424j600_enable_dma, "Enable SPI DMA. Default: 0 (Off)");
+MODULE_ALIAS("spi:" DRV_NAME);
+
diff -uprN -X a/Documentation/dontdiff a/drivers/net/enc424j600_hw.h
b/drivers/net/enc424j600_hw.h
--- a/drivers/net/enc424j600_hw.h 1970-01-01 05:30:00.000000000 +0530
+++ b/drivers/net/enc424j600_hw.h 2011-02-08 18:55:19.000000000 +0530
@@ -0,0 +1,460 @@
+/*
+* enc424j600_hw.h: Register definitions
+*
+*/
+
+#ifndef _ENC424J600_HW_H
+#define _ENC424J600_HW_H
+#define SFR_REG_COUNT 0xA0
+/*
+* ENC424J600 Control Registers
+* Control register definitions are a combination of address
+* and bank number
+* - Register address (bits 0-4)
+* - Bank number (bits 5-6)
+*/
+#define ADDR_MASK 0x1F
+#define BANK_MASK 0x60
+#define BANK_SHIFT 5
+
+/* All-bank registers */
+#define EUDASTL 0x16
+#define EUDASTH 0x17
+#define EUDANDL 0x18
+#define EUDANDH 0x19
+#define ESTATL 0x1A
+#define ESTATH 0x1B
+#define EIRL 0x1C
+#define EIRH 0x1D
+#define ECON1L 0x1E
+#define ECON1H 0x1F
+
+/* Bank 0 registers */
+#define ETXSTL (0x00 | 0x00)
+#define ETXSTH (0x01 | 0x00)
+#define ETXLENL (0x02 | 0x00)
+#define ETXLENH (0x03 | 0x00)
+#define ERXSTL (0x04 | 0x00)
+#define ERXSTH (0x05 | 0x00)
+#define ERXTAILL (0x06 | 0x00)
+#define ERXTAILH (0x07 | 0x00)
+#define ERXHEADL (0x08 | 0x00)
+#define ERXHEADH (0x09 | 0x00)
+#define EDMASTL (0x0A | 0x00)
+#define EDMASTH (0x0B | 0x00)
+#define EDMALENL (0x0C | 0x00)
+#define EDMALENH (0x0D | 0x00)
+#define EDMADSTL (0x0E | 0x00)
+#define EDMADSTH (0x0F | 0x00)
+#define EDMACSL (0x10 | 0x00)
+#define EDMACSH (0x11 | 0x00)
+#define ETXSTATL (0x12 | 0x00)
+#define ETXSTATH (0x13 | 0x00)
+#define ETXWIREL (0x14 | 0x00)
+#define ETXWIREH (0x15 | 0x00)
+
+/* Bank 1 registers */
+#define EHT1L (0x00 | 0x20)
+#define EHT1H (0x01 | 0x20)
+#define EHT2L (0x02 | 0x20)
+#define EHT2H (0x03 | 0x20)
+#define EHT3L (0x04 | 0x20)
+#define EHT3H (0x05 | 0x20)
+#define EHT4L (0x06 | 0x20)
+#define EHT4H (0x07 | 0x20)
+#define EPMM1L (0x08 | 0x20)
+#define EPMM1H (0x09 | 0x20)
+#define EPMM2L (0x0A | 0x20)
+#define EPMM2H (0x0B | 0x20)
+#define EPMM3L (0x0C | 0x20)
+#define EPMM3H (0x0D | 0x20)
+#define EPMM4L (0x0E | 0x20)
+#define EPMM4H (0x0F | 0x20)
+#define EPMCSL (0x10 | 0x20)
+#define EPMCSH (0x11 | 0x20)
+#define EPMOL (0x12 | 0x20)
+#define EPMOH (0x13 | 0x20)
+#define ERXFCONL (0x14 | 0x20)
+#define ERXFCONH (0x15 | 0x20)
+
+/* Bank 2 registers */
+#define MACON1L (0x00 | 0x40)
+#define MACON1H (0x01 | 0x40)
+#define MACON2L (0x02 | 0x40)
+#define MACON2H (0x03 | 0x40)
+#define MABBIPGL (0x04 | 0x40)
+#define MABBIPGH (0x05 | 0x40)
+#define MAIPGL (0x06 | 0x40)
+#define MAIPGH (0x07 | 0x40)
+#define MACLCONL (0x08 | 0x40)
+#define MACLCONH (0x09 | 0x40)
+#define MAMXFLL (0x0A | 0x40)
+#define MAMXFLH (0x0B | 0x40)
+#define MICMDL (0x12 | 0x40)
+#define MICMDH (0x13 | 0x40)
+#define MIREGADRL (0x14 | 0x40)
+#define MIREGADRH (0x15 | 0x40)
+
+/* Bank 3 registers */
+#define MAADR3L (0x00 | 0x60)
+#define MAADR3H (0x01 | 0x60)
+#define MAADR2L (0x02 | 0x60)
+#define MAADR2H (0x03 | 0x60)
+#define MAADR1L (0x04 | 0x60)
+#define MAADR1H (0x05 | 0x60)
+#define MIWRL (0x06 | 0x60)
+#define MIWRH (0x07 | 0x60)
+#define MIRDL (0x08 | 0x60)
+#define MIRDH (0x09 | 0x60)
+#define MISTATL (0x0A | 0x60)
+#define MISTATH (0x0B | 0x60)
+#define EPAUSL (0x0C | 0x60)
+#define EPAUSH (0x0D | 0x60)
+#define ECON2L (0x0E | 0x60)
+#define ECON2H (0x0F | 0x60)
+#define ERXWML (0x10 | 0x60)
+#define ERXWMH (0x11 | 0x60)
+#define EIEL (0x12 | 0x60)
+#define EIEH (0x13 | 0x60)
+#define EIDLEDL (0x14 | 0x60)
+#define EIDLEDH (0x15 | 0x60)
+
+/* Unbanked registers */
+#define EGPDATA (0x00 | 0x80)
+#define ERXDATA (0x02 | 0x80)
+#define EUDADATA (0x04 | 0x80)
+#define EGPRDPTL (0x06 | 0x80)
+#define EGPRDPTH (0x07 | 0x80)
+#define EGPWRPTL (0x08 | 0x80)
+#define EGPWRPTH (0x09 | 0x80)
+#define ERXRDPTL (0x0A | 0x80)
+#define ERXRDPTH (0x0B | 0x80)
+#define ERXWRPTL (0x0C | 0x80)
+#define ERXWRPTH (0x0D | 0x80)
+#define EUDARDPTL (0x0E | 0x80)
+#define EUDARDPTH (0x0F | 0x80)
+#define EUDAWRPTL (0x10 | 0x80)
+#define EUDAWRPTH (0x11 | 0x80)
+
+/* PHY registers */
+#define PHCON1 0x00
+#define PHSTAT1 0x01
+#define PHANA 0x04
+#define PHANLPA 0x05
+#define PHANE 0x06
+#define PHCON2 0x11
+#define PHSTAT2 0x1B
+#define PHSTAT3 0x1F
+
+/* Single-byte instructions */
+#define BXSEL(bank) (0xC0 + (bank & (BANK_MASK >> BANK_SHIFT)) * 2)
+/* Bank X Select */
+#define B0SEL 0xC0 /* Bank 0 Select */
+#define B1SEL 0xC2 /* Bank 1 Select */
+#define B2SEL 0xC4 /* Bank 2 Select */
+#define B3SEL 0xC6 /* Bank 3 Select */
+#define SETETHRST 0xCA /* System Reset */
+#define FCDISABLE 0xE0 /* Flow Control Disable */
+#define FCSINGLE 0xE2 /* Flow Control Single */
+#define FCMULTIPLE 0xE4 /* Flow Control Multiple */
+#define FCCLEAR 0xE6 /* Flow Control Clear */
+#define SETPKTDEC 0xCC /* Decrement Packet Counter */
+#define DMASTOP 0xD2 /* DMA Stop */
+#define DMACKSUM 0xD8 /* DMA Start Checksum */
+#define DMACKSUMS 0xDA /* DMA Start Checksum with Seed */
+#define DMACOPY 0xDC /* DMA Start Copy */
+#define DMACOPYS 0xDE /* DMA Start Copy and Checksum with Seed */
+#define SETTXRTS 0xD4 /* Request Packet Transmission */
+#define ENABLERX 0xE8 /* Enable RX */
+#define DISABLERX 0xEA /* Disable RX */
+#define SETEIE 0xEC /* Enable Interrupts */
+#define CLREIE 0xEE /* Disable Interrupts */
+
+/* Two byte instructions */
+#define RBSEL 0xC8 /* Read Bank Select */
+
+/* Three byte instructions */
+#define WGPRDPT 0x60 /* Write EGPRDPT */
+#define RGPRDPT 0x62 /* Read EGPRDPT */
+#define WRXRDPT 0x64 /* Write ERXRDPT */
+#define RRXRDPT 0x66 /* Read ERXRDPT */
+#define WUDARDPT 0x68 /* Write EUDARDPT */
+#define RUDARDPT 0x6A /* Read EUDARDPT */
+#define WGPWRPT 0x6C /* Write EGPWRPT */
+#define RGPWRPT 0x6E /* Read EGPWRPT */
+#define WRXWRPT 0x70 /* Write ERXWRPT */
+#define RRXWRPT 0x72 /* Read ERXWRPT */
+#define WUDAWRPT 0x74 /* Write EUDAWRPT */
+#define RUDAWRPT 0x76 /* Read EUDAWRPT */
+
+/* n byte instructions */
+#define RCR(addr) (0x00 | (addr & ADDR_MASK)) /* Read Control Register */
+#define WCR(addr) (0x40 | (addr & ADDR_MASK)) /* Write Control Register */
+#define RCRU 0x20 /* Read Control Register Unbanked */
+#define WCRU 0x22 /* Write Control Register Unbanked */
+#define BFS(addr) (0x80 | (addr & ADDR_MASK)) /* Bit Field Set */
+#define BFC(addr) (0xA0 | (addr & ADDR_MASK)) /* Bit Field Clear */
+#define BFSU 0x24 /* Bit Field Set Unbanked */
+#define BFCU 0x26 /* Bit Field Clear Unbanked */
+#define RGPDATA 0x28 /* Read EGPDATA */
+#define WGPDATA 0x2A /* Write EGPDATA */
+#define RRXDATA 0x2C /* Read ERXDATA */
+#define WRXDATA 0x2E /* Write ERXDATA */
+#define RUDADATA 0x30 /* Read EUDADATA */
+#define WUDADATA 0x32 /* Write EUDADATA */
+
+/* Register bit definitions */
+/* ESTATH */
+#define INT (1 << 7)
+#define FCIDLE (1 << 6)
+#define RXBUSY (1 << 5)
+#define CLKRDY (1 << 4)
+#define PHYDPX (1 << 2)
+#define PHYLNK (1 << 0)
+
+/* EIRH */
+/*for ease of use lets access it as a word*/
+#define CRYPTEN (1 << 15)
+#define MODEXIF (1 << 14)
+#define HASHIF (1 << 13)
+#define AESIF (1 << 12)
+#define LINKIF (1 << 11)
+
+/* EIRL */
+#define PKTIF (1 << 6)
+#define DMAIF (1 << 5)
+#define TXIF (1 << 3)
+#define TXABTIF (1 << 2)
+#define RXABTIF (1 << 1)
+#define PCFULIF (1 << 0)
+
+/* ECON1H */
+#define MODEXST (1 << 7)
+#define HASHEN (1 << 6)
+#define HASHOP (1 << 5)
+#define HASHLST (1 << 4)
+#define AESST (1 << 3)
+#define AESOP1 (1 << 2)
+#define AESOP0 (1 << 1)
+#define PKTDEC (1 << 0)
+
+/* ECON1L */
+#define FCOP1 (1 << 7)
+#define FCOP0 (1 << 6)
+#define DMAST (1 << 5)
+#define DMACPY (1 << 4)
+#define DMACSSD (1 << 3)
+#define DMANOCS (1 << 2)
+#define TXRTS (1 << 1)
+#define RXEN (1 << 0)
+
+/* ETXSTATH */
+#define LATECOL (1 << 2)
+#define MAXCOL (1 << 1)
+#define EXDEFER (1 << 0)
+
+/* ETXSTATL */
+#define ETXSTATL_DEFER (1 << 7)
+#define CRCBAD (1 << 4)
+#define COLCNT_MASK 0xF
+
+/* ERXFCONH */
+#define HTEN (1 << 7)
+#define MPEN (1 << 6)
+#define NOTPM (1 << 4)
+#define PMEN3 (1 << 3)
+#define PMEN2 (1 << 2)
+#define PMEN1 (1 << 1)
+#define PMEN0 (1 << 0)
+
+/* ERXFCONL */
+#define CRCEEN (1 << 7)
+#define CRCEN (1 << 6)
+#define RUNTEEN (1 << 5)
+#define RUNTEN (1 << 4)
+#define UCEN (1 << 3)
+#define NOTMEEN (1 << 2)
+#define MCEN (1 << 1)
+#define BCEN (1 << 0)
+/*no bytewise access*/
+/* MACON1L */
+#define LOOPBK (1 << 4)
+#define RXPAUS (1 << 2)
+#define PASSALL (1 << 1)
+
+/* MACON2 */
+#define MACON2_DEFER (1 << 14)
+#define BPEN (1 << 13)
+#define NOBKOFF (1 << 12)
+#define PADCFG2 (1 << 7)
+#define PADCFG1 (1 << 6)
+#define PADCFG0 (1 << 5)
+#define TXCRCEN (1 << 4)
+#define PHDREN (1 << 3)
+#define HFRMEN (1 << 2)
+#define FULDPX (1 << 0)
+
+/* MAIPG */
+/* value of the high byte is given by the reserved bits,
+* value of the low byte is recomended setting of the
+* IPG parameter.
+*/
+#define MAIPGH_VAL 0x0C
+#define MAIPGL_VAL 0x12
+
+/* MIREGADRH */
+#define MIREGADRH_VAL 0x01
+
+/* MIREGADRL */
+#define PHREG_MASK 0x1F
+
+/* MICMDL */
+#define MIISCAN (1 << 1)
+#define MIIRD (1 << 0)
+
+/* MISTATL */
+#define NVALID (1 << 2)
+#define SCAN (1 << 1)
+#define BUSY (1 << 0)
+
+/* ECON2H */
+#define ETHEN (1 << 7)
+#define STRCH (1 << 6)
+#define TXMAC (1 << 5)
+#define SHA1MD5 (1 << 4)
+#define COCON3 (1 << 3)
+#define COCON2 (1 << 2)
+#define COCON1 (1 << 1)
+#define COCON0 (1 << 0)
+
+/* ECON2L */
+#define AUTOFC (1 << 7)
+#define TXRST (1 << 6)
+#define RXRST (1 << 5)
+#define ETHRST (1 << 4)
+#define MODLEN1 (1 << 3)
+#define MODLEN0 (1 << 2)
+#define AESLEN1 (1 << 1)
+#define AESLEN0 (1 << 0)
+
+/* EIEH */
+#define INTIE (1 << 7)
+#define MODEXIE (1 << 6)
+#define HASHIE (1 << 5)
+#define AESIE (1 << 4)
+#define LINKIE (1 << 3)
+
+/* EIEL */
+#define PKTIE (1 << 6)
+#define DMAIE (1 << 5)
+#define TXIE (1 << 3)
+#define TXABTIE (1 << 2)
+#define RXABTIE (1 << 1)
+#define PCFULIE (1 << 0)
+
+/* EIDLEDH */
+#define LACFG3 (1 << 7)
+#define LACFG2 (1 << 6)
+#define LACFG1 (1 << 5)
+#define LACFG0 (1 << 4)
+#define LBCFG3 (1 << 3)
+#define LBCFG2 (1 << 2)
+#define LBCFG1 (1 << 1)
+#define LBCFG0 (1 << 0)
+
+/* EIDLEDL */
+#define DEVID_SHIFT 5
+#define DEVID_MASK (0x7 << DEVID_SHIFT)
+#define REVID_SHIFT 0
+#define REVID_MASK (0x1F << REVID_SHIFT)
+
+/* PHANA */
+/* Default value for PHY initialization*/
+#define PHANA_DEFAULT 0x05E1
+
+/* PHCON1 */
+#define PRST (1 << 15)
+#define PLOOPBK (1 << 14)
+#define SPD100 (1 << 13)
+#define ANEN (1 << 12)
+#define PSLEEP (1 << 11)
+#define RENEG (1 << 9)
+#define PFULDPX (1 << 8)
+
+/* PHSTAT */
+#define FULL100 (1 << 14)
+#define HALF100 (1 << 13)
+#define FULL10 (1 << 12)
+#define HALF10 (1 << 11)
+#define ANDONE (1 << 5)
+#define LRFAULT (1 << 4)
+#define ANABLE (1 << 3)
+#define LLSTAT (1 << 2)
+#define EXTREGS (1 << 0)
+
+#define EUDAST_TEST_VAL 0x1234
+
+#define TSV_SIZE 7
+
+#define ENC424J600_DEV_ID 0x1
+
+/* Configuration */
+
+/* Led is on when the link is present and driven low
+* temporarily when packet is TX'd or RX'd */
+#define LED_A_SETTINGS 0xC
+
+/* Led is on if the link is in 100 Mbps mode */
+#define LED_B_SETTINGS 0x8
+
+/* maximum ethernet frame length
+* Currently not used as a limit anywhere
+* (we're using the "huge frame enable" feature of
+* enc424j600). */
+#define MAX_FRAMELEN 1518
+
+/* Size in bytes of the receive buffer in enc424j600.
+* Must be word aligned (even).
+*/
+#define RX_BUFFER_SIZE (15 * MAX_FRAMELEN)
+
+/* Start of the general purpose area in sram */
+#define SRAM_GP_START 0x0
+
+/* SRAM size */
+#define SRAM_SIZE 0x6000
+
+/* Start of the receive buffer */
+#define ERXST_VAL (SRAM_SIZE - RX_BUFFER_SIZE)
+
+#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_RUNTFILTERMATCH 31
+#define RSV_NOTMEFILTERMATCH 32
+#define RSV_HASHFILTERMATCH 33
+#define RSV_MAGICPKTFILTERMATCH 34
+#define RSV_PTRNMTCHFILTERMATCH 35
+#define RSV_UNICASTFILTERMATCH 36
+
+#define RSV_SIZE 8
+#define RSV_BITMASK(x) (1 << ((x) - 16))
+#define RSV_GETBIT(x, y) (((x) & RSV_BITMASK(y)) ? 1 : 0)
+
+/* Put RX buffer at 0 as suggested by the Errata datasheet */
+
+#define RXSTART_INIT ERXST_VAL
+#define RXEND_INIT 0x5FFF
+
+#endif
diff -uprN -X a/Documentation/dontdiff a/drivers/net/Kconfig
b/drivers/net/Kconfig
--- a/drivers/net/Kconfig 2010-07-05 22:41:43.000000000 +0530
+++ b/drivers/net/Kconfig 2011-01-16 15:26:16.000000000 +0530
@@ -973,6 +973,16 @@ config ENC28J60_WRITEVERIFY
Enable the verify after the buffer write useful for debugging purpose.
If unsure, say N.
+config ENC424J600
+ tristate "ENC424J600 support"
+ depends on EXPERIMENTAL && SPI && NET_ETHERNET
+ select CRC32
+ ---help---
+ Support for the Microchip EN424J600 ethernet chip.
+
+ To compile this driver as a module, choose M here. The module will be
+ called enc424j600.
+
config ETHOC
tristate "OpenCores 10/100 Mbps Ethernet MAC support"
depends on NET_ETHERNET && HAS_IOMEM
diff -uprN -X a/Documentation/dontdiff a/drivers/net/Makefile
b/drivers/net/Makefile
--- a/drivers/net/Makefile 2010-07-05 22:41:43.000000000 +0530
+++ b/drivers/net/Makefile 2011-01-05 21:46:57.000000000 +0530
@@ -240,6 +240,7 @@ obj-$(CONFIG_PASEMI_MAC) += pasemi_mac_d
pasemi_mac_driver-objs := pasemi_mac.o pasemi_mac_ethtool.o
obj-$(CONFIG_MLX4_CORE) += mlx4/
obj-$(CONFIG_ENC28J60) += enc28j60.o
+obj-$(CONFIG_ENC424J600) += enc424j600.o
obj-$(CONFIG_ETHOC) += ethoc.o
obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
--
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