Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b07878e5 authored by Richard Ršöjfors's avatar Richard Röjfors Committed by David S. Miller
Browse files

netdev: Added KS8842 driver 



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: default avatarRichard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5ff8dda3

drivers/net/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ks8842.c

0 → 100644
+732 −0
Original line number Diff line number Diff line 
/*

 * 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");