===================================================================
@@ -1722,6 +1722,11 @@
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
===================================================================
@@ -84,6 +84,7 @@
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
===================================================================
@@ -0,0 +1,749 @@
+/*
+ * 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 {
+ u8 __iomem *hw_addr;
+ int irq;
+ struct tasklet_struct tasklet;
+ spinlock_t lock; /* spinlock to be interrupt safe */
+ struct net_device_stats net_stats;
+ 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 -ENOBUFS;
+
+ /* the control word, enable IRQ, port 1 and the length */
+ ctrl = 0x8000 | 0x100 | (len << 16);
+ ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
+
+ adapter->net_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 0;
+}
+
+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 = dev_alloc_skb(len + 2);
+
+ dev_dbg(&adapter->pdev->dev, "%s, got package, len: %d\n",
+ __func__, len);
+ if (skb) {
+ u32 *data;
+
+ adapter->net_stats.rx_packets++;
+ adapter->net_stats.rx_bytes += len;
+ if (status & RXSR_MULTICAST)
+ adapter->net_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->dev = netdev;
+ skb->protocol = eth_type_trans(skb, netdev);
+ netdev->last_rx = jiffies;
+ netif_rx(skb);
+ } else
+ adapter->net_stats.rx_dropped++;
+ } else {
+ dev_dbg(&adapter->pdev->dev, "RX error, status: %x\n", status);
+ adapter->net_stats.rx_errors++;
+ if (status & RXSR_TOO_LONG)
+ adapter->net_stats.rx_length_errors++;
+ if (status & RXSR_CRC_ERROR)
+ adapter->net_stats.rx_crc_errors++;
+ if (status & RXSR_RUNT)
+ adapter->net_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);
+ adapter->net_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__);
+ adapter->net_stats.rx_errors++;
+ adapter->net_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 = (struct ks8842_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 struct net_device_stats *ks8842_get_stats(struct net_device *netdev)
+{
+ struct ks8842_adapter *adapter = netdev_priv(netdev);
+
+ return &adapter->net_stats;
+}
+
+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_get_stats = ks8842_get_stats,
+ .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;
+
+ strncpy(netdev->name, DRV_NAME, sizeof(netdev->name) - 1);
+
+ ks8842_read_mac_addr(adapter, netdev->dev_addr);
+
+ id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
+
+ /* tell the stack to leave us alone until ks8842_open() is called */
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+
+ 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:
+ kfree(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);
+ kfree(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");
+
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> --- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html