AX88796 network driver

Support for the Asix AX88796 network controller, an
NE2000 compatible 10/100 ethernet device with internal
PHY.

The driver supports PHY settings via either ioctl() or
the ethtool driver ops.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

4 files changed, 972 insertions, 0 deletions

diff --git a/drivers/net/8390.h b/drivers/net/8390.h
index 414de5bd228f..04ddec0f4c61 100644
--- a/drivers/net/8390.h
+++ b/drivers/net/8390.h
@@ -73,6 +73,9 @@ struct ei_device {
         u32 *reg_offset;                /* Register mapping table */
         spinlock_t page_lock;           /* Page register locks */
         unsigned long priv;             /* Private field to store bus IDs etc. */
+#ifdef AX88796_PLATFORM
+        unsigned char rxcr_base;        /* default value for RXCR */
+#endif
 };
 
 /* The maximum number of 8390 interrupt service routines called per IRQ. */
@@ -86,11 +89,19 @@ struct ei_device {
 /* Some generic ethernet register configurations. */
 #define E8390_TX_IRQ_MASK       0xa     /* For register EN0_ISR */
 #define E8390_RX_IRQ_MASK       0x5
+
+#ifdef AX88796_PLATFORM
+#define E8390_RXCONFIG          (ei_status.rxcr_base | 0x04)
+#define E8390_RXOFF             (ei_status.rxcr_base | 0x20)
+#else
 #define E8390_RXCONFIG          0x4     /* EN0_RXCR: broadcasts, no multicast,errors */
 #define E8390_RXOFF             0x20    /* EN0_RXCR: Accept no packets */
+#endif
+
 #define E8390_TXCONFIG          0x00    /* EN0_TXCR: Normal transmit mode */
 #define E8390_TXOFF             0x02    /* EN0_TXCR: Transmitter off */
 
+
 /*  Register accessed at EN_CMD, the 8390 base addr.  */
 #define E8390_STOP      0x01    /* Stop and reset the chip */
 #define E8390_START     0x02    /* Start the chip, clear reset */
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 4f23ad7b13c1..09c68984c887 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -197,6 +197,14 @@ config MACB
 
 source "drivers/net/arm/Kconfig"
 
+config AX88796
+        tristate "ASIX AX88796 NE2000 clone support"
+        select CRC32
+        select MII
+        help
+          AX88796 driver, using platform bus to provide
+          chip detection and resources
+
 config MACE
         tristate "MACE (Power Mac ethernet) support"
         depends on PPC_PMAC && PPC32
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index eb62fb48e4b7..515ca660b936 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_NET_SB1250_MAC) += sb1250-mac.o
 obj-$(CONFIG_B44) += b44.o
 obj-$(CONFIG_FORCEDETH) += forcedeth.o
 obj-$(CONFIG_NE_H8300) += ne-h8300.o
+obj-$(CONFIG_AX88796) += ax88796.o
 
 obj-$(CONFIG_TSI108_ETH) += tsi108_eth.o
 obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
diff --git a/drivers/net/ax88796.c b/drivers/net/ax88796.c
new file mode 100644
index 000000000000..d19874bf0706
--- /dev/null
+++ b/drivers/net/ax88796.c
@@ -0,0 +1,952 @@
+/* drivers/net/ax88796.c
+ *
+ * Copyright 2005,2007 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * Asix AX88796 10/100 Ethernet controller support
+ *      Based on ne.c, by Donald Becker, et-al.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/isapnp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+
+#include <net/ax88796.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+
+static int phy_debug = 0;
+
+/* Rename the lib8390.c functions to show that they are in this driver */
+#define __ei_open       ax_ei_open
+#define __ei_close      ax_ei_close
+#define __ei_poll       ax_ei_poll
+#define __ei_tx_timeout ax_ei_tx_timeout
+#define __ei_interrupt  ax_ei_interrupt
+#define ____alloc_ei_netdev ax__alloc_ei_netdev
+#define __NS8390_init   ax_NS8390_init
+
+/* force unsigned long back to 'void __iomem *' */
+#define ax_convert_addr(_a) ((void __force __iomem *)(_a))
+
+#define ei_inb(_a)      readb(ax_convert_addr(_a))
+#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))
+
+#define ei_inb_p(_a)    ei_inb(_a)
+#define ei_outb_p(_v, _a) ei_outb(_v, _a)
+
+/* define EI_SHIFT() to take into account our register offsets */
+#define EI_SHIFT(x)     (ei_local->reg_offset[(x)])
+
+/* Ensure we have our RCR base value */
+#define AX88796_PLATFORM
+
+static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";
+
+#include "lib8390.c"
+
+#define DRV_NAME "ax88796"
+#define DRV_VERSION "1.00"
+
+/* from ne.c */
+#define NE_CMD          EI_SHIFT(0x00)
+#define NE_RESET        EI_SHIFT(0x1f)
+#define NE_DATAPORT     EI_SHIFT(0x10)
+
+#define NE1SM_START_PG  0x20    /* First page of TX buffer */
+#define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
+#define NESM_START_PG   0x40    /* First page of TX buffer */
+#define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
+
+/* device private data */
+
+struct ax_device {
+        struct timer_list        mii_timer;
+        spinlock_t               mii_lock;
+        struct mii_if_info       mii;
+
+        u32                      msg_enable;
+        void __iomem            *map2;
+        struct platform_device  *dev;
+        struct resource         *mem;
+        struct resource         *mem2;
+        struct ax_plat_data     *plat;
+
+        unsigned char            running;
+        unsigned char            resume_open;
+
+        u32                      reg_offsets[0x20];
+};
+
+static inline struct ax_device *to_ax_dev(struct net_device *dev)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        return (struct ax_device *)(ei_local+1);
+}
+
+/* ax_initial_check
+ *
+ * do an initial probe for the card to check wether it exists
+ * and is functional
+ */
+
+static int ax_initial_check(struct net_device *dev)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        void __iomem *ioaddr = ei_local->mem;
+        int reg0;
+        int regd;
+
+        reg0 = ei_inb(ioaddr);
+        if (reg0 == 0xFF)
+                return -ENODEV;
+
+        ei_outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
+        regd = ei_inb(ioaddr + 0x0d);
+        ei_outb(0xff, ioaddr + 0x0d);
+        ei_outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
+        ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
+        if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
+                ei_outb(reg0, ioaddr);
+                ei_outb(regd, ioaddr + 0x0d);   /* Restore the old values. */
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+/* Hard reset the card.  This used to pause for the same period that a
+   8390 reset command required, but that shouldn't be necessary. */
+
+static void ax_reset_8390(struct net_device *dev)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        unsigned long reset_start_time = jiffies;
+        void __iomem *addr = (void __iomem *)dev->base_addr;
+
+        if (ei_debug > 1)
+                printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
+
+        ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
+
+        ei_status.txing = 0;
+        ei_status.dmaing = 0;
+
+        /* This check _should_not_ be necessary, omit eventually. */
+        while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
+                if (jiffies - reset_start_time > 2*HZ/100) {
+                        printk(KERN_WARNING "%s: %s did not complete.\n",
+                               __FUNCTION__, dev->name);
+                        break;
+                }
+        }
+
+        ei_outb(ENISR_RESET, addr + EN0_ISR);   /* Ack intr. */
+}
+
+
+static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+                            int ring_page)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        void __iomem *nic_base = ei_local->mem;
+
+        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
+        if (ei_status.dmaing) {
+                printk(KERN_EMERG "%s: DMAing conflict in %s [DMAstat:%d][irqlock:%d].\n",
+                        dev->name, __FUNCTION__,
+                       ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+
+        ei_status.dmaing |= 0x01;
+        ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+        ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
+        ei_outb(0, nic_base + EN0_RCNTHI);
+        ei_outb(0, nic_base + EN0_RSARLO);              /* On page boundary */
+        ei_outb(ring_page, nic_base + EN0_RSARHI);
+        ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+
+        if (ei_status.word16)
+                readsw(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
+        else
+                readsb(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
+
+        ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
+        ei_status.dmaing &= ~0x01;
+
+        le16_to_cpus(&hdr->count);
+}
+
+
+/* Block input and output, similar to the Crynwr packet driver.  If you
+   are porting to a new ethercard, look at the packet driver source for hints.
+   The NEx000 doesn't share the on-board packet memory -- you have to put
+   the packet out through the "remote DMA" dataport using ei_outb. */
+
+static void ax_block_input(struct net_device *dev, int count,
+                           struct sk_buff *skb, int ring_offset)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        void __iomem *nic_base = ei_local->mem;
+        char *buf = skb->data;
+
+        if (ei_status.dmaing) {
+                printk(KERN_EMERG "%s: DMAing conflict in ax_block_input "
+                        "[DMAstat:%d][irqlock:%d].\n",
+                        dev->name, ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+
+        ei_status.dmaing |= 0x01;
+
+        ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+        ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
+        ei_outb(count >> 8, nic_base + EN0_RCNTHI);
+        ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
+        ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
+        ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+
+        if (ei_status.word16) {
+                readsw(nic_base + NE_DATAPORT, buf, count >> 1);
+                if (count & 0x01)
+                        buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
+
+        } else {
+                readsb(nic_base + NE_DATAPORT, buf, count);
+        }
+
+        ei_status.dmaing &= ~1;
+}
+
+static void ax_block_output(struct net_device *dev, int count,
+                            const unsigned char *buf, const int start_page)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        void __iomem *nic_base = ei_local->mem;
+        unsigned long dma_start;
+
+        /* Round the count up for word writes.  Do we need to do this?
+           What effect will an odd byte count have on the 8390?
+           I should check someday. */
+
+        if (ei_status.word16 && (count & 0x01))
+                count++;
+
+        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
+        if (ei_status.dmaing) {
+                printk(KERN_EMERG "%s: DMAing conflict in %s."
+                        "[DMAstat:%d][irqlock:%d]\n",
+                        dev->name, __FUNCTION__,
+                       ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+
+        ei_status.dmaing |= 0x01;
+        /* We should already be in page 0, but to be safe... */
+        ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
+
+        ei_outb(ENISR_RDC, nic_base + EN0_ISR);
+
+        /* Now the normal output. */
+        ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
+        ei_outb(count >> 8,   nic_base + EN0_RCNTHI);
+        ei_outb(0x00, nic_base + EN0_RSARLO);
+        ei_outb(start_page, nic_base + EN0_RSARHI);
+
+        ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
+        if (ei_status.word16) {
+                writesw(nic_base + NE_DATAPORT, buf, count>>1);
+        } else {
+                writesb(nic_base + NE_DATAPORT, buf, count);
+        }
+
+        dma_start = jiffies;
+
+        while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
+                if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
+                        printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
+                        ax_reset_8390(dev);
+                        ax_NS8390_init(dev,1);
+                        break;
+                }
+        }
+
+        ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
+        ei_status.dmaing &= ~0x01;
+        return;
+}
+
+/* definitions for accessing MII/EEPROM interface */
+
+#define AX_MEMR                 EI_SHIFT(0x14)
+#define AX_MEMR_MDC             (1<<0)
+#define AX_MEMR_MDIR            (1<<1)
+#define AX_MEMR_MDI             (1<<2)
+#define AX_MEMR_MDO             (1<<3)
+#define AX_MEMR_EECS            (1<<4)
+#define AX_MEMR_EEI             (1<<5)
+#define AX_MEMR_EEO             (1<<6)
+#define AX_MEMR_EECLK           (1<<7)
+
+/* ax_mii_ei_outbits
+ *
+ * write the specified set of bits to the phy
+*/
+
+static void
+ax_mii_ei_outbits(struct net_device *dev, unsigned int bits, int len)
+{
+        struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+        void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
+        unsigned int memr;
+
+        /* clock low, data to output mode */
+        memr = ei_inb(memr_addr);
+        memr &= ~(AX_MEMR_MDC | AX_MEMR_MDIR);
+        ei_outb(memr, memr_addr);
+
+        for (len--; len >= 0; len--) {
+                if (bits & (1 << len))
+                        memr |= AX_MEMR_MDO;
+                else
+                        memr &= ~AX_MEMR_MDO;
+
+                ei_outb(memr, memr_addr);
+
+                /* clock high */
+
+                ei_outb(memr | AX_MEMR_MDC, memr_addr);
+                udelay(1);
+
+                /* clock low */
+                ei_outb(memr, memr_addr);
+        }
+
+        /* leaves the clock line low, mdir input */
+        memr |= AX_MEMR_MDIR;
+        ei_outb(memr, (void __iomem *)dev->base_addr + AX_MEMR);
+}
+
+/* ax_phy_ei_inbits
+ *
+ * read a specified number of bits from the phy
+*/
+
+static unsigned int
+ax_phy_ei_inbits(struct net_device *dev, int no)
+{
+        struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+        void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
+        unsigned int memr;
+        unsigned int result = 0;
+
+        /* clock low, data to input mode */
+        memr = ei_inb(memr_addr);
+        memr &= ~AX_MEMR_MDC;
+        memr |= AX_MEMR_MDIR;
+        ei_outb(memr, memr_addr);
+
+        for (no--; no >= 0; no--) {
+                ei_outb(memr | AX_MEMR_MDC, memr_addr);
+
+                udelay(1);
+
+                if (ei_inb(memr_addr) & AX_MEMR_MDI)
+                        result |= (1<<no);
+
+                ei_outb(memr, memr_addr);
+        }
+
+        return result;
+}
+
+/* ax_phy_issueaddr
+ *
+ * use the low level bit shifting routines to send the address
+ * and command to the specified phy
+*/
+
+static void
+ax_phy_issueaddr(struct net_device *dev, int phy_addr, int reg, int opc)
+{
+        if (phy_debug)
+                pr_debug("%s: dev %p, %04x, %04x, %d\n",
+                        __FUNCTION__, dev, phy_addr, reg, opc);
+
+        ax_mii_ei_outbits(dev, 0x3f, 6);        /* pre-amble */
+        ax_mii_ei_outbits(dev, 1, 2);           /* frame-start */
+        ax_mii_ei_outbits(dev, opc, 2);         /* op code */
+        ax_mii_ei_outbits(dev, phy_addr, 5);    /* phy address */
+        ax_mii_ei_outbits(dev, reg, 5);         /* reg address */
+}
+
+static int
+ax_phy_read(struct net_device *dev, int phy_addr, int reg)
+{
+        struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+        unsigned long flags;
+        unsigned int result;
+
+        spin_lock_irqsave(&ei_local->page_lock, flags);
+
+        ax_phy_issueaddr(dev, phy_addr, reg, 2);
+
+        result = ax_phy_ei_inbits(dev, 17);
+        result &= ~(3<<16);
+
+        spin_unlock_irqrestore(&ei_local->page_lock, flags);
+
+        if (phy_debug)
+                pr_debug("%s: %04x.%04x => read %04x\n", __FUNCTION__,
+                         phy_addr, reg, result);
+
+        return result;
+}
+
+static void
+ax_phy_write(struct net_device *dev, int phy_addr, int reg, int value)
+{
+        struct ei_device *ei = (struct ei_device *) netdev_priv(dev);
+        unsigned long flags;
+
+        printk(KERN_DEBUG "%s: %p, %04x, %04x %04x\n",
+               __FUNCTION__, dev, phy_addr, reg, value);
+
+        spin_lock_irqsave(&ei->page_lock, flags);
+
+        ax_phy_issueaddr(dev, phy_addr, reg, 1);
+        ax_mii_ei_outbits(dev, 2, 2);           /* send TA */
+        ax_mii_ei_outbits(dev, value, 16);
+
+        spin_unlock_irqrestore(&ei->page_lock, flags);
+}
+
+static void ax_mii_expiry(unsigned long data)
+{
+        struct net_device *dev = (struct net_device *)data;
+        struct ax_device  *ax = to_ax_dev(dev);
+        unsigned long flags;
+
+        spin_lock_irqsave(&ax->mii_lock, flags);
+        mii_check_media(&ax->mii, netif_msg_link(ax), 0);
+        spin_unlock_irqrestore(&ax->mii_lock, flags);
+
+        if (ax->running) {
+                ax->mii_timer.expires = jiffies + HZ*2;
+                add_timer(&ax->mii_timer);
+        }
+}
+
+static int ax_open(struct net_device *dev)
+{
+        struct ax_device  *ax = to_ax_dev(dev);
+        struct ei_device *ei_local = netdev_priv(dev);
+        int ret;
+
+        dev_dbg(ax->dev, "%s: open\n", dev->name);
+
+        ret = request_irq(dev->irq, ax_ei_interrupt, 0, dev->name, dev);
+        if (ret)
+                return ret;
+
+        ret = ax_ei_open(dev);
+        if (ret)
+                return ret;
+
+        /* turn the phy on (if turned off) */
+
+        ei_outb(ax->plat->gpoc_val, ei_local->mem + EI_SHIFT(0x17));
+        ax->running = 1;
+
+        /* start the MII timer */
+
+        init_timer(&ax->mii_timer);
+
+        ax->mii_timer.expires  = jiffies+1;
+        ax->mii_timer.data     = (unsigned long) dev;
+        ax->mii_timer.function = ax_mii_expiry;
+
+        add_timer(&ax->mii_timer);
+
+        return 0;
+}
+
+static int ax_close(struct net_device *dev)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        struct ei_device *ei_local = netdev_priv(dev);
+
+        dev_dbg(ax->dev, "%s: close\n", dev->name);
+
+        /* turn the phy off */
+
+        ei_outb(ax->plat->gpoc_val | (1<<6),
+               ei_local->mem + EI_SHIFT(0x17));
+
+        ax->running = 0;
+        wmb();
+
+        del_timer_sync(&ax->mii_timer);
+        ax_ei_close(dev);
+
+        free_irq(dev->irq, dev);
+        return 0;
+}
+
+static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        unsigned long flags;
+        int rc;
+
+        if (!netif_running(dev))
+                return -EINVAL;
+
+        spin_lock_irqsave(&ax->mii_lock, flags);
+        rc = generic_mii_ioctl(&ax->mii, if_mii(req), cmd, NULL);
+        spin_unlock_irqrestore(&ax->mii_lock, flags);
+
+        return rc;
+}
+
+/* ethtool ops */
+
+static void ax_get_drvinfo(struct net_device *dev,
+                           struct ethtool_drvinfo *info)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+
+        strcpy(info->driver, DRV_NAME);
+        strcpy(info->version, DRV_VERSION);
+        strcpy(info->bus_info, ax->dev->name);
+}
+
+static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        unsigned long flags;
+
+        spin_lock_irqsave(&ax->mii_lock, flags);
+        mii_ethtool_gset(&ax->mii, cmd);
+        spin_lock_irqsave(&ax->mii_lock, flags);
+
+        return 0;
+}
+
+static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        unsigned long flags;
+        int rc;
+
+        spin_lock_irqsave(&ax->mii_lock, flags);
+        rc = mii_ethtool_sset(&ax->mii, cmd);
+        spin_lock_irqsave(&ax->mii_lock, flags);
+
+        return rc;
+}
+
+static int ax_nway_reset(struct net_device *dev)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        return mii_nway_restart(&ax->mii);
+}
+
+static u32 ax_get_link(struct net_device *dev)
+{
+        struct ax_device *ax = to_ax_dev(dev);
+        return mii_link_ok(&ax->mii);
+}
+
+static const struct ethtool_ops ax_ethtool_ops = {
+        .get_drvinfo            = ax_get_drvinfo,
+        .get_settings           = ax_get_settings,
+        .set_settings           = ax_set_settings,
+        .nway_reset             = ax_nway_reset,
+        .get_link               = ax_get_link,
+        .get_perm_addr          = ethtool_op_get_perm_addr,
+};
+
+/* setup code */
+
+static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
+{
+        void __iomem *ioaddr = ei_local->mem;
+        struct ax_device *ax = to_ax_dev(dev);
+
+        /* Select page 0*/
+        ei_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr + E8390_CMD);
+
+        /* set to byte access */
+        ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
+        ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
+}
+
+/* ax_init_dev
+ *
+ * initialise the specified device, taking care to note the MAC
+ * address it may already have (if configured), ensure
+ * the device is ready to be used by lib8390.c and registerd with
+ * the network layer.
+ */
+
+static int ax_init_dev(struct net_device *dev, int first_init)
+{
+        struct ei_device *ei_local = netdev_priv(dev);
+        struct ax_device *ax = to_ax_dev(dev);
+        void __iomem *ioaddr = ei_local->mem;
+        unsigned int start_page;
+        unsigned int stop_page;
+        int ret;
+        int i;
+
+        ret = ax_initial_check(dev);
+        if (ret)
+                goto err_out;
+
+        /* setup goes here */
+
+        ax_initial_setup(dev, ei_local);
+
+        /* read the mac from the card prom if we need it */
+
+        if (first_init && ax->plat->flags & AXFLG_HAS_EEPROM) {
+                unsigned char SA_prom[32];
+
+                for(i = 0; i < sizeof(SA_prom); i+=2) {
+                        SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
+                        SA_prom[i+1] = ei_inb(ioaddr + NE_DATAPORT);
+                }
+
+                if (ax->plat->wordlength == 2)
+                        for (i = 0; i < 16; i++)
+                                SA_prom[i] = SA_prom[i+i];
+
+                memcpy(dev->dev_addr,  SA_prom, 6);
+        }
+
+        if (ax->plat->wordlength == 2) {
+                /* We must set the 8390 for word mode. */
+                ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
+                start_page = NESM_START_PG;
+                stop_page = NESM_STOP_PG;
+        } else {
+                start_page = NE1SM_START_PG;
+                stop_page = NE1SM_STOP_PG;
+        }
+
+        /* load the mac-address from the device if this is the
+         * first time we've initialised */
+
+        if (first_init && ax->plat->flags & AXFLG_MAC_FROMDEV) {
+                ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
+                        ei_local->mem + E8390_CMD); /* 0x61 */
+
+                for (i = 0 ; i < ETHER_ADDR_LEN ; i++)
+                        dev->dev_addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
+        }
+
+        ax_reset_8390(dev);
+
+        ei_status.name = "AX88796";
+        ei_status.tx_start_page = start_page;
+        ei_status.stop_page = stop_page;
+        ei_status.word16 = (ax->plat->wordlength == 2);
+        ei_status.rx_start_page = start_page + TX_PAGES;
+
+#ifdef PACKETBUF_MEMSIZE
+         /* Allow the packet buffer size to be overridden by know-it-alls. */
+        ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
+#endif
+
+        ei_status.reset_8390    = &ax_reset_8390;
+        ei_status.block_input   = &ax_block_input;
+        ei_status.block_output  = &ax_block_output;
+        ei_status.get_8390_hdr  = &ax_get_8390_hdr;
+        ei_status.priv = 0;
+
+        dev->open               = ax_open;
+        dev->stop               = ax_close;
+        dev->do_ioctl           = ax_ioctl;
+        dev->ethtool_ops        = &ax_ethtool_ops;
+
+        ax->msg_enable          = NETIF_MSG_LINK;
+        ax->mii.phy_id_mask     = 0x1f;
+        ax->mii.reg_num_mask    = 0x1f;
+        ax->mii.phy_id          = 0x10;         /* onboard phy */
+        ax->mii.force_media     = 0;
+        ax->mii.full_duplex     = 0;
+        ax->mii.mdio_read       = ax_phy_read;
+        ax->mii.mdio_write      = ax_phy_write;
+        ax->mii.dev             = dev;
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        dev->poll_controller = ax_ei_poll;
+#endif
+        ax_NS8390_init(dev, 0);
+
+        if (first_init) {
+                printk("AX88796: %dbit, irq %d, %lx, MAC: ",
+                       ei_status.word16 ? 16:8, dev->irq, dev->base_addr);
+
+                for (i = 0; i < ETHER_ADDR_LEN; i++)
+                        printk("%2.2x%c", dev->dev_addr[i],
+                               (i < (ETHER_ADDR_LEN-1) ? ':' : ' '));
+
+                printk("\n");
+        }
+
+        ret = register_netdev(dev);
+        if (ret)
+                goto out_irq;
+
+        return 0;
+
+ out_irq:
+        /* cleanup irq */
+        free_irq(dev->irq, dev);
+ err_out:
+        return ret;
+}
+
+static int ax_remove(struct platform_device *_dev)
+{
+        struct net_device *dev = platform_get_drvdata(_dev);
+        struct ax_device  *ax;
+
+        ax = to_ax_dev(dev);
+
+        unregister_netdev(dev);
+        free_irq(dev->irq, dev);
+
+        iounmap(ei_status.mem);
+        release_resource(ax->mem);
+        kfree(ax->mem);
+
+        if (ax->map2) {
+                iounmap(ax->map2);
+                release_resource(ax->mem2);
+                kfree(ax->mem2);
+        }
+
+        free_netdev(dev);
+
+        return 0;
+}
+
+/* ax_probe
+ *
+ * This is the entry point when the platform device system uses to
+ * notify us of a new device to attach to. Allocate memory, find
+ * the resources and information passed, and map the necessary registers.
+*/
+
+static int ax_probe(struct platform_device *pdev)
+{
+        struct net_device *dev;
+        struct ax_device  *ax;
+        struct resource   *res;
+        size_t size;
+        int ret;
+
+        dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
+        if (dev == NULL)
+                return -ENOMEM;
+
+        /* ok, let's setup our device */
+        ax = to_ax_dev(dev);
+
+        memset(ax, 0, sizeof(struct ax_device));
+
+        spin_lock_init(&ax->mii_lock);
+
+        ax->dev = pdev;
+        ax->plat = pdev->dev.platform_data;
+        platform_set_drvdata(pdev, dev);
+
+        ei_status.rxcr_base  = ax->plat->rcr_val;
+
+        /* find the platform resources */
+
+        dev->irq  = platform_get_irq(pdev, 0);
+        if (dev->irq < 0) {
+                dev_err(&pdev->dev, "no IRQ specified\n");
+                ret = -ENXIO;
+                goto exit_mem;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (res == NULL) {
+                dev_err(&pdev->dev, "no MEM specified\n");
+                ret = -ENXIO;
+                goto exit_mem;
+        }
+
+        size = (res->end - res->start) + 1;
+
+        /* setup the register offsets from either the platform data
+         * or by using the size of the resource provided */
+
+        if (ax->plat->reg_offsets)
+                ei_status.reg_offset = ax->plat->reg_offsets;
+        else {
+                ei_status.reg_offset = ax->reg_offsets;
+                for (ret = 0; ret < 0x18; ret++)
+                        ax->reg_offsets[ret] = (size / 0x18) * ret;
+        }
+
+        ax->mem = request_mem_region(res->start, size, pdev->name);
+        if (ax->mem == NULL) {
+                dev_err(&pdev->dev, "cannot reserve registers\n");
+                ret = -ENXIO;
+                goto exit_mem;
+        }
+
+        ei_status.mem = ioremap(res->start, size);
+        dev->base_addr = (long)ei_status.mem;
+
+        if (ei_status.mem == NULL) {
+                dev_err(&pdev->dev, "Cannot ioremap area (%08zx,%08zx)\n",
+                        res->start, res->end);
+
+                ret = -ENXIO;
+                goto exit_req;
+        }
+
+        /* look for reset area */
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+        if (res == NULL) {
+                if (!ax->plat->reg_offsets) {
+                        for (ret = 0; ret < 0x20; ret++)
+                                ax->reg_offsets[ret] = (size / 0x20) * ret;
+                }
+
+                ax->map2 = NULL;
+        } else {
+                size = (res->end - res->start) + 1;
+
+                ax->mem2 = request_mem_region(res->start, size, pdev->name);
+                if (ax->mem == NULL) {
+                        dev_err(&pdev->dev, "cannot reserve registers\n");
+                        ret = -ENXIO;
+                        goto exit_mem1;
+                }
+
+                ax->map2 = ioremap(res->start, size);
+                if (ax->map2 == NULL) {
+                        dev_err(&pdev->dev, "cannot map reset register");
+                        ret = -ENXIO;
+                        goto exit_mem2;
+                }
+
+                ei_status.reg_offset[0x1f] = ax->map2 - ei_status.mem;
+        }
+
+        /* got resources, now initialise and register device */
+
+        ret = ax_init_dev(dev, 1);
+        if (!ret)
+                return 0;
+
+        if (ax->map2 == NULL)
+                goto exit_mem1;
+
+        iounmap(ax->map2);
+
+ exit_mem2:
+        release_resource(ax->mem2);
+        kfree(ax->mem2);
+
+ exit_mem1:
+        iounmap(ei_status.mem);
+
+ exit_req:
+        release_resource(ax->mem);
+        kfree(ax->mem);
+
+ exit_mem:
+        free_netdev(dev);
+
+        return ret;
+}
+
+/* suspend and resume */
+
+#ifdef CONFIG_PM
+static int ax_suspend(struct platform_device *dev, pm_message_t state)
+{
+        struct net_device *ndev = platform_get_drvdata(dev);
+        struct ax_device  *ax = to_ax_dev(ndev);
+
+        ax->resume_open = ax->running;
+
+        netif_device_detach(ndev);
+        ax_close(ndev);
+
+        return 0;
+}
+
+static int ax_resume(struct platform_device *pdev)
+{
+        struct net_device *ndev = platform_get_drvdata(pdev);
+        struct ax_device  *ax = to_ax_dev(ndev);
+
+        ax_initial_setup(ndev, netdev_priv(ndev));
+        ax_NS8390_init(ndev, ax->resume_open);
+        netif_device_attach(ndev);
+
+        if (ax->resume_open)
+                ax_open(ndev);
+
+        return 0;
+}
+
+#else
+#define ax_suspend NULL
+#define ax_resume  NULL
+#endif
+
+static struct platform_driver axdrv = {
+        .driver = {
+                .name           = "ax88796",
+                .owner          = THIS_MODULE,
+        },
+        .probe          = ax_probe,
+        .remove         = ax_remove,
+        .suspend        = ax_suspend,
+        .resume         = ax_resume,
+};
+
+static int __init axdrv_init(void)
+{
+        return platform_driver_register(&axdrv);
+}
+
+static void __exit axdrv_exit(void)
+{
+        platform_driver_unregister(&axdrv);
+}
+
+module_init(axdrv_init);
+module_exit(axdrv_exit);
+
+MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
+MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
+MODULE_LICENSE("GPL v2");