netdev: Added KS8842 driver
authorRichard R\9aöjfors <richard.rojfors.ext@mocean-labs.com>
Thu, 4 Jun 2009 03:35:55 +0000 (03:35 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 8 Jun 2009 07:20:20 +0000 (00:20 -0700)
This is a driver for the Micrel KS8842 ethernet switch.

The supplied code is for driving the KS8842 through the Timberdale FPGA
on the Russellville board, a development board for Intel Atom CPU
in the automotive area.

Signed-off-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/Kconfig
drivers/net/Makefile
drivers/net/ks8842.c [new file with mode: 0644]

index f19018d..18c29a8 100644 (file)
@@ -1723,6 +1723,11 @@ config TLAN
 
          Please email feedback to <torben.mathiasen@compaq.com>.
 
+config KS8842
+       tristate "Micrel KSZ8842"
+       help
+         This platform driver is for Micrel KSZ8842 chip.
+
 config VIA_RHINE
        tristate "VIA Rhine support"
        depends on NET_PCI && PCI
index 774c2b4..1c378dd 100644 (file)
@@ -86,6 +86,7 @@ obj-$(CONFIG_TC35815) += tc35815.o
 obj-$(CONFIG_SKGE) += skge.o
 obj-$(CONFIG_SKY2) += sky2.o
 obj-$(CONFIG_SKFP) += skfp/
+obj-$(CONFIG_KS8842)   += ks8842.o
 obj-$(CONFIG_VIA_RHINE) += via-rhine.o
 obj-$(CONFIG_VIA_VELOCITY) += via-velocity.o
 obj-$(CONFIG_ADAPTEC_STARFIRE) += starfire.o
diff --git a/drivers/net/ks8842.c b/drivers/net/ks8842.c
new file mode 100644 (file)
index 0000000..39b0aea
--- /dev/null
@@ -0,0 +1,732 @@
+/*
+ * ks8842_main.c timberdale KS8842 ethernet driver
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * The Micrel KS8842 behind the timberdale FPGA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+
+#define DRV_NAME "ks8842"
+
+/* Timberdale specific Registers */
+#define REG_TIMB_RST   0x1c
+
+/* KS8842 registers */
+
+#define REG_SELECT_BANK 0x0e
+
+/* bank 0 registers */
+#define REG_QRFCR      0x04
+
+/* bank 2 registers */
+#define REG_MARL       0x00
+#define REG_MARM       0x02
+#define REG_MARH       0x04
+
+/* bank 3 registers */
+#define REG_GRR                0x06
+
+/* bank 16 registers */
+#define REG_TXCR       0x00
+#define REG_TXSR       0x02
+#define REG_RXCR       0x04
+#define REG_TXMIR      0x08
+#define REG_RXMIR      0x0A
+
+/* bank 17 registers */
+#define REG_TXQCR      0x00
+#define REG_RXQCR      0x02
+#define REG_TXFDPR     0x04
+#define REG_RXFDPR     0x06
+#define REG_QMU_DATA_LO 0x08
+#define REG_QMU_DATA_HI 0x0A
+
+/* bank 18 registers */
+#define REG_IER                0x00
+#define IRQ_LINK_CHANGE        0x8000
+#define IRQ_TX         0x4000
+#define IRQ_RX         0x2000
+#define IRQ_RX_OVERRUN 0x0800
+#define IRQ_TX_STOPPED 0x0200
+#define IRQ_RX_STOPPED 0x0100
+#define IRQ_RX_ERROR   0x0080
+#define ENABLED_IRQS   (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \
+               IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR)
+#define REG_ISR                0x02
+#define REG_RXSR       0x04
+#define RXSR_VALID     0x8000
+#define RXSR_BROADCAST 0x80
+#define RXSR_MULTICAST 0x40
+#define RXSR_UNICAST   0x20
+#define RXSR_FRAMETYPE 0x08
+#define RXSR_TOO_LONG  0x04
+#define RXSR_RUNT      0x02
+#define RXSR_CRC_ERROR 0x01
+#define RXSR_ERROR     (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR)
+
+/* bank 32 registers */
+#define REG_SW_ID_AND_ENABLE   0x00
+#define REG_SGCR1              0x02
+#define REG_SGCR2              0x04
+#define REG_SGCR3              0x06
+
+/* bank 39 registers */
+#define REG_MACAR1             0x00
+#define REG_MACAR2             0x02
+#define REG_MACAR3             0x04
+
+/* bank 45 registers */
+#define REG_P1MBCR             0x00
+#define REG_P1MBSR             0x02
+
+/* bank 46 registers */
+#define REG_P2MBCR             0x00
+#define REG_P2MBSR             0x02
+
+/* bank 48 registers */
+#define REG_P1CR2              0x02
+
+/* bank 49 registers */
+#define REG_P1CR4              0x02
+#define REG_P1SR               0x04
+
+struct ks8842_adapter {
+       void __iomem    *hw_addr;
+       int             irq;
+       struct tasklet_struct   tasklet;
+       spinlock_t      lock; /* spinlock to be interrupt safe */
+       struct platform_device *pdev;
+};
+
+static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank)
+{
+       iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK);
+}
+
+static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank,
+       u8 value, int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       iowrite8(value, adapter->hw_addr + offset);
+}
+
+static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank,
+       u16 value, int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       iowrite16(value, adapter->hw_addr + offset);
+}
+
+static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank,
+       u16 bits, int offset)
+{
+       u16 reg;
+       ks8842_select_bank(adapter, bank);
+       reg = ioread16(adapter->hw_addr + offset);
+       reg |= bits;
+       iowrite16(reg, adapter->hw_addr + offset);
+}
+
+static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank,
+       u16 bits, int offset)
+{
+       u16 reg;
+       ks8842_select_bank(adapter, bank);
+       reg = ioread16(adapter->hw_addr + offset);
+       reg &= ~bits;
+       iowrite16(reg, adapter->hw_addr + offset);
+}
+
+static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank,
+       u32 value, int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       iowrite32(value, adapter->hw_addr + offset);
+}
+
+static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank,
+       int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       return ioread8(adapter->hw_addr + offset);
+}
+
+static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank,
+       int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       return ioread16(adapter->hw_addr + offset);
+}
+
+static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank,
+       int offset)
+{
+       ks8842_select_bank(adapter, bank);
+       return ioread32(adapter->hw_addr + offset);
+}
+
+static void ks8842_reset(struct ks8842_adapter *adapter)
+{
+       /* The KS8842 goes haywire when doing softare reset
+        * a work around in the timberdale IP is implemented to
+        * do a hardware reset instead
+       ks8842_write16(adapter, 3, 1, REG_GRR);
+       msleep(10);
+       iowrite16(0, adapter->hw_addr + REG_GRR);
+       */
+       iowrite16(32, adapter->hw_addr + REG_SELECT_BANK);
+       iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST);
+       msleep(20);
+}
+
+static void ks8842_update_link_status(struct net_device *netdev,
+       struct ks8842_adapter *adapter)
+{
+       /* check the status of the link */
+       if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) {
+               netif_carrier_on(netdev);
+               netif_wake_queue(netdev);
+       } else {
+               netif_stop_queue(netdev);
+               netif_carrier_off(netdev);
+       }
+}
+
+static void ks8842_enable_tx(struct ks8842_adapter *adapter)
+{
+       ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR);
+}
+
+static void ks8842_disable_tx(struct ks8842_adapter *adapter)
+{
+       ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR);
+}
+
+static void ks8842_enable_rx(struct ks8842_adapter *adapter)
+{
+       ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR);
+}
+
+static void ks8842_disable_rx(struct ks8842_adapter *adapter)
+{
+       ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR);
+}
+
+static void ks8842_reset_hw(struct ks8842_adapter *adapter)
+{
+       /* reset the HW */
+       ks8842_reset(adapter);
+
+       /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */
+       ks8842_write16(adapter, 16, 0x000E, REG_TXCR);
+
+       /* enable the receiver, uni + multi + broadcast + flow ctrl
+               + crc strip */
+       ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400,
+               REG_RXCR);
+
+       /* TX frame pointer autoincrement */
+       ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR);
+
+       /* RX frame pointer autoincrement */
+       ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR);
+
+       /* RX 2 kb high watermark */
+       ks8842_write16(adapter, 0, 0x1000, REG_QRFCR);
+
+       /* aggresive back off in half duplex */
+       ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1);
+
+       /* enable no excessive collison drop */
+       ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2);
+
+       /* Enable port 1 force flow control / back pressure / transmit / recv */
+       ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2);
+
+       /* restart port auto-negotiation */
+       ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4);
+       /* only advertise 10Mbps */
+       ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4);
+
+       /* Enable the transmitter */
+       ks8842_enable_tx(adapter);
+
+       /* Enable the receiver */
+       ks8842_enable_rx(adapter);
+
+       /* clear all interrupts */
+       ks8842_write16(adapter, 18, 0xffff, REG_ISR);
+
+       /* enable interrupts */
+       ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
+
+       /* enable the switch */
+       ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE);
+}
+
+static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest)
+{
+       int i;
+       u16 mac;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i);
+
+       /* make sure the switch port uses the same MAC as the QMU */
+       mac = ks8842_read16(adapter, 2, REG_MARL);
+       ks8842_write16(adapter, 39, mac, REG_MACAR1);
+       mac = ks8842_read16(adapter, 2, REG_MARM);
+       ks8842_write16(adapter, 39, mac, REG_MACAR2);
+       mac = ks8842_read16(adapter, 2, REG_MARH);
+       ks8842_write16(adapter, 39, mac, REG_MACAR3);
+}
+
+static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
+{
+       return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff;
+}
+
+static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       int len = skb->len;
+       u32 *ptr = (u32 *)skb->data;
+       u32 ctrl;
+
+       dev_dbg(&adapter->pdev->dev,
+               "%s: len %u head %p data %p tail %p end %p\n",
+               __func__, skb->len, skb->head, skb->data,
+               skb_tail_pointer(skb), skb_end_pointer(skb));
+
+       /* check FIFO buffer space, we need space for CRC and command bits */
+       if (ks8842_tx_fifo_space(adapter) < len + 8)
+               return NETDEV_TX_BUSY;
+
+       /* the control word, enable IRQ, port 1 and the length */
+       ctrl = 0x8000 | 0x100 | (len << 16);
+       ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
+
+       netdev->stats.tx_bytes += len;
+
+       /* copy buffer */
+       while (len > 0) {
+               iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
+               len -= sizeof(u32);
+               ptr++;
+       }
+
+       /* enqueue packet */
+       ks8842_write16(adapter, 17, 1, REG_TXQCR);
+
+       dev_kfree_skb(skb);
+
+       return NETDEV_TX_OK;
+}
+
+static void ks8842_rx_frame(struct net_device *netdev,
+       struct ks8842_adapter *adapter)
+{
+       u32 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO);
+       int len = (status >> 16) & 0x7ff;
+
+       status &= 0xffff;
+
+       dev_dbg(&adapter->pdev->dev, "%s - rx_data: status: %x\n",
+               __func__, status);
+
+       /* check the status */
+       if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
+               struct sk_buff *skb = netdev_alloc_skb(netdev, len + 2);
+
+               dev_dbg(&adapter->pdev->dev, "%s, got package, len: %d\n",
+                       __func__, len);
+               if (skb) {
+                       u32 *data;
+
+                       netdev->stats.rx_packets++;
+                       netdev->stats.rx_bytes += len;
+                       if (status & RXSR_MULTICAST)
+                               netdev->stats.multicast++;
+
+                       /* Align socket buffer in 4-byte boundary for
+                                better performance. */
+                       skb_reserve(skb, 2);
+                       data = (u32 *)skb_put(skb, len);
+
+                       ks8842_select_bank(adapter, 17);
+                       while (len > 0) {
+                               *data++ = ioread32(adapter->hw_addr +
+                                       REG_QMU_DATA_LO);
+                               len -= sizeof(u32);
+                       }
+
+                       skb->protocol = eth_type_trans(skb, netdev);
+                       netif_rx(skb);
+               } else
+                       netdev->stats.rx_dropped++;
+       } else {
+               dev_dbg(&adapter->pdev->dev, "RX error, status: %x\n", status);
+               netdev->stats.rx_errors++;
+               if (status & RXSR_TOO_LONG)
+                       netdev->stats.rx_length_errors++;
+               if (status & RXSR_CRC_ERROR)
+                       netdev->stats.rx_crc_errors++;
+               if (status & RXSR_RUNT)
+                       netdev->stats.rx_frame_errors++;
+       }
+
+       /* set high watermark to 3K */
+       ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR);
+
+       /* release the frame */
+       ks8842_write16(adapter, 17, 0x01, REG_RXQCR);
+
+       /* set high watermark to 2K */
+       ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR);
+}
+
+void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter)
+{
+       u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
+       dev_dbg(&adapter->pdev->dev, "%s Entry - rx_data: %d\n",
+               __func__, rx_data);
+       while (rx_data) {
+               ks8842_rx_frame(netdev, adapter);
+               rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
+       }
+}
+
+void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter)
+{
+       u16 sr = ks8842_read16(adapter, 16, REG_TXSR);
+       dev_dbg(&adapter->pdev->dev, "%s - entry, sr: %x\n", __func__, sr);
+       netdev->stats.tx_packets++;
+       if (netif_queue_stopped(netdev))
+               netif_wake_queue(netdev);
+}
+
+void ks8842_handle_rx_overrun(struct net_device *netdev,
+       struct ks8842_adapter *adapter)
+{
+       dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+       netdev->stats.rx_errors++;
+       netdev->stats.rx_fifo_errors++;
+}
+
+void ks8842_tasklet(unsigned long arg)
+{
+       struct net_device *netdev = (struct net_device *)arg;
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       u16 isr;
+       unsigned long flags;
+       u16 entry_bank;
+
+       /* read current bank to be able to set it back */
+       spin_lock_irqsave(&adapter->lock, flags);
+       entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
+       spin_unlock_irqrestore(&adapter->lock, flags);
+
+       isr = ks8842_read16(adapter, 18, REG_ISR);
+       dev_dbg(&adapter->pdev->dev, "%s - ISR: 0x%x\n", __func__, isr);
+
+       /* Ack */
+       ks8842_write16(adapter, 18, isr, REG_ISR);
+
+       if (!netif_running(netdev))
+               return;
+
+       if (isr & IRQ_LINK_CHANGE)
+               ks8842_update_link_status(netdev, adapter);
+
+       if (isr & (IRQ_RX | IRQ_RX_ERROR))
+               ks8842_handle_rx(netdev, adapter);
+
+       if (isr & IRQ_TX)
+               ks8842_handle_tx(netdev, adapter);
+
+       if (isr & IRQ_RX_OVERRUN)
+               ks8842_handle_rx_overrun(netdev, adapter);
+
+       if (isr & IRQ_TX_STOPPED) {
+               ks8842_disable_tx(adapter);
+               ks8842_enable_tx(adapter);
+       }
+
+       if (isr & IRQ_RX_STOPPED) {
+               ks8842_disable_rx(adapter);
+               ks8842_enable_rx(adapter);
+       }
+
+       /* re-enable interrupts, put back the bank selection register */
+       spin_lock_irqsave(&adapter->lock, flags);
+       ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
+       iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
+       spin_unlock_irqrestore(&adapter->lock, flags);
+}
+
+static irqreturn_t ks8842_irq(int irq, void *devid)
+{
+       struct ks8842_adapter *adapter = devid;
+       u16 isr;
+       u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
+       irqreturn_t ret = IRQ_NONE;
+
+       isr = ks8842_read16(adapter, 18, REG_ISR);
+       dev_dbg(&adapter->pdev->dev, "%s - ISR: 0x%x\n", __func__, isr);
+
+       if (isr) {
+               /* disable IRQ */
+               ks8842_write16(adapter, 18, 0x00, REG_IER);
+
+               /* schedule tasklet */
+               tasklet_schedule(&adapter->tasklet);
+
+               ret = IRQ_HANDLED;
+       }
+
+       iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
+
+       return ret;
+}
+
+
+/* Netdevice operations */
+
+static int ks8842_open(struct net_device *netdev)
+{
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       int err;
+
+       dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__);
+
+       /* reset the HW */
+       ks8842_reset_hw(adapter);
+
+       ks8842_update_link_status(netdev, adapter);
+
+       err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
+               adapter);
+       if (err) {
+               printk(KERN_ERR "Failed to request IRQ: %d: %d\n",
+                       adapter->irq, err);
+               return err;
+       }
+
+       return 0;
+}
+
+static int ks8842_close(struct net_device *netdev)
+{
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+
+       dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__);
+
+       /* free the irq */
+       free_irq(adapter->irq, adapter);
+
+       /* disable the switch */
+       ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE);
+
+       return 0;
+}
+
+static int ks8842_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+       int ret;
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+
+       dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+
+       ret = ks8842_tx_frame(skb, netdev);
+
+       if (ks8842_tx_fifo_space(adapter) <  netdev->mtu + 8)
+               netif_stop_queue(netdev);
+
+       return ret;
+}
+
+static int ks8842_set_mac(struct net_device *netdev, void *p)
+{
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       unsigned long flags;
+       struct sockaddr *addr = p;
+       char *mac = (u8 *)addr->sa_data;
+       int i;
+
+       dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+
+       if (!is_valid_ether_addr(addr->sa_data))
+               return -EADDRNOTAVAIL;
+
+       memcpy(netdev->dev_addr, mac, netdev->addr_len);
+
+       spin_lock_irqsave(&adapter->lock, flags);
+       for (i = 0; i < ETH_ALEN; i++) {
+               ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
+               ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
+                       REG_MACAR1 + i);
+       }
+       spin_unlock_irqrestore(&adapter->lock, flags);
+       return 0;
+}
+
+static void ks8842_tx_timeout(struct net_device *netdev)
+{
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       unsigned long flags;
+
+       dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+
+       spin_lock_irqsave(&adapter->lock, flags);
+       /* disable interrupts */
+       ks8842_write16(adapter, 18, 0, REG_IER);
+       ks8842_write16(adapter, 18, 0xFFFF, REG_ISR);
+       spin_unlock_irqrestore(&adapter->lock, flags);
+
+       ks8842_reset_hw(adapter);
+
+       ks8842_update_link_status(netdev, adapter);
+}
+
+static const struct net_device_ops ks8842_netdev_ops = {
+       .ndo_open               = ks8842_open,
+       .ndo_stop               = ks8842_close,
+       .ndo_start_xmit         = ks8842_xmit_frame,
+       .ndo_set_mac_address    = ks8842_set_mac,
+       .ndo_tx_timeout         = ks8842_tx_timeout,
+       .ndo_validate_addr      = eth_validate_addr
+};
+
+static struct ethtool_ops ks8842_ethtool_ops = {
+       .get_link               = ethtool_op_get_link,
+};
+
+static int __devinit ks8842_probe(struct platform_device *pdev)
+{
+       int err = -ENOMEM;
+       struct resource *iomem;
+       struct net_device *netdev;
+       struct ks8842_adapter *adapter;
+       u16 id;
+
+       iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
+               goto err_mem_region;
+
+       netdev = alloc_etherdev(sizeof(struct ks8842_adapter));
+       if (!netdev)
+               goto err_alloc_etherdev;
+
+       SET_NETDEV_DEV(netdev, &pdev->dev);
+
+       adapter = netdev_priv(netdev);
+       adapter->hw_addr = ioremap(iomem->start, resource_size(iomem));
+       if (!adapter->hw_addr)
+               goto err_ioremap;
+
+       adapter->irq = platform_get_irq(pdev, 0);
+       if (adapter->irq < 0) {
+               err = adapter->irq;
+               goto err_get_irq;
+       }
+
+       adapter->pdev = pdev;
+
+       tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev);
+       spin_lock_init(&adapter->lock);
+
+       netdev->netdev_ops = &ks8842_netdev_ops;
+       netdev->ethtool_ops = &ks8842_ethtool_ops;
+
+       ks8842_read_mac_addr(adapter, netdev->dev_addr);
+
+       id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
+
+       strcpy(netdev->name, "eth%d");
+       err = register_netdev(netdev);
+       if (err)
+               goto err_register;
+
+       platform_set_drvdata(pdev, netdev);
+
+       printk(KERN_INFO DRV_NAME
+               " Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n",
+               (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7);
+
+       return 0;
+
+err_register:
+err_get_irq:
+       iounmap(adapter->hw_addr);
+err_ioremap:
+       free_netdev(netdev);
+err_alloc_etherdev:
+       release_mem_region(iomem->start, resource_size(iomem));
+err_mem_region:
+       return err;
+}
+
+static int __devexit ks8842_remove(struct platform_device *pdev)
+{
+       struct net_device *netdev = platform_get_drvdata(pdev);
+       struct ks8842_adapter *adapter = netdev_priv(netdev);
+       struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+       unregister_netdev(netdev);
+       tasklet_kill(&adapter->tasklet);
+       iounmap(adapter->hw_addr);
+       free_netdev(netdev);
+       release_mem_region(iomem->start, resource_size(iomem));
+       platform_set_drvdata(pdev, NULL);
+       return 0;
+}
+
+
+static struct platform_driver ks8842_platform_driver = {
+       .driver = {
+               .name   = DRV_NAME,
+               .owner  = THIS_MODULE,
+       },
+       .probe          = ks8842_probe,
+       .remove         = ks8842_remove,
+};
+
+static int __init ks8842_init(void)
+{
+       return platform_driver_register(&ks8842_platform_driver);
+}
+
+static void __exit ks8842_exit(void)
+{
+       platform_driver_unregister(&ks8842_platform_driver);
+}
+
+module_init(ks8842_init);
+module_exit(ks8842_exit);
+
+MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver");
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ks8842");
+