/*
- * ks8842_main.c timberdale KS8842 ethernet driver
+ * ks8842.c timberdale KS8842 ethernet driver
* Copyright (c) 2009 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
/* Supports:
* The Micrel KS8842 behind the timberdale FPGA
+ * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
+#include <linux/ks8842.h>
#define DRV_NAME "ks8842"
#define REG_P1CR4 0x02
#define REG_P1SR 0x04
+/* flags passed by platform_device for configuration */
+#define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */
+#define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */
+
struct ks8842_adapter {
void __iomem *hw_addr;
int irq;
+ unsigned long conf_flags; /* copy of platform_device config */
struct tasklet_struct tasklet;
spinlock_t lock; /* spinlock to be interrupt safe */
- struct platform_device *pdev;
+ struct work_struct timeout_work;
+ struct net_device *netdev;
};
static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank)
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);
+ if (adapter->conf_flags & MICREL_KS884X) {
+ ks8842_write16(adapter, 3, 1, REG_GRR);
+ msleep(10);
+ iowrite16(0, adapter->hw_addr + REG_GRR);
+ } else {
+ /* 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);
+ */
+ iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST);
+ msleep(20);
+ }
}
static void ks8842_update_link_status(struct net_device *netdev,
/* 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);
+
+ if (!(adapter->conf_flags & MICREL_KS884X))
+ /* only advertise 10Mbps */
+ ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4);
/* Enable the transmitter */
ks8842_enable_tx(adapter);
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);
+ if (adapter->conf_flags & MICREL_KS884X) {
+ /*
+ the sequence of saving mac addr between MAC and Switch is
+ different.
+ */
+
+ mac = ks8842_read16(adapter, 2, REG_MARL);
+ ks8842_write16(adapter, 39, mac, REG_MACAR3);
+ 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_MACAR1);
+ } else {
+
+ /* 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 void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac)
+{
+ unsigned long flags;
+ unsigned i;
+
+ 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);
+ if (!(adapter->conf_flags & MICREL_KS884X))
+ ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
+ REG_MACAR1 + i);
+ }
+
+ if (adapter->conf_flags & MICREL_KS884X) {
+ /*
+ the sequence of saving mac addr between MAC and Switch is
+ different.
+ */
+
+ u16 mac;
+
+ mac = ks8842_read16(adapter, 2, REG_MARL);
+ ks8842_write16(adapter, 39, mac, REG_MACAR3);
+ 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_MACAR1);
+ }
+ spin_unlock_irqrestore(&adapter->lock, flags);
}
static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
{
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",
+ netdev_dbg(netdev, "%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));
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);
+ if (adapter->conf_flags & KS884X_16BIT) {
+ u16 *ptr16 = (u16 *)skb->data;
+ ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO);
+ ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI);
+ netdev->stats.tx_bytes += len;
+
+ /* copy buffer */
+ while (len > 0) {
+ iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO);
+ iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI);
+ len -= sizeof(u32);
+ }
+ } else {
+
+ u32 *ptr = (u32 *)skb->data;
+ u32 ctrl;
+ /* 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;
+ netdev->stats.tx_bytes += len;
- /* copy buffer */
- while (len > 0) {
- iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
- len -= sizeof(u32);
- ptr++;
+ /* copy buffer */
+ while (len > 0) {
+ iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
+ len -= sizeof(u32);
+ ptr++;
+ }
}
/* enqueue packet */
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;
+ u16 status16;
+ u32 status;
+ int len;
- status &= 0xffff;
-
- dev_dbg(&adapter->pdev->dev, "%s - rx_data: status: %x\n",
- __func__, status);
+ if (adapter->conf_flags & KS884X_16BIT) {
+ status16 = ks8842_read16(adapter, 17, REG_QMU_DATA_LO);
+ len = (int)ks8842_read16(adapter, 17, REG_QMU_DATA_HI);
+ len &= 0xffff;
+ netdev_dbg(netdev, "%s - rx_data: status: %x\n",
+ __func__, status16);
+ } else {
+ status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO);
+ len = (status >> 16) & 0x7ff;
+ status &= 0xffff;
+ netdev_dbg(netdev, "%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_ip_align(netdev, len);
- dev_dbg(&adapter->pdev->dev, "%s, got package, len: %d\n",
- __func__, len);
+ netdev_dbg(netdev, "%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++;
- 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);
+ if (adapter->conf_flags & KS884X_16BIT) {
+ u16 *data16 = (u16 *)skb_put(skb, len);
+ ks8842_select_bank(adapter, 17);
+ while (len > 0) {
+ *data16++ = ioread16(adapter->hw_addr +
+ REG_QMU_DATA_LO);
+ *data16++ = ioread16(adapter->hw_addr +
+ REG_QMU_DATA_HI);
+ len -= sizeof(u32);
+ }
+ } else {
+ u32 *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_dbg(netdev, "RX error, status: %x\n", status);
netdev->stats.rx_errors++;
if (status & RXSR_TOO_LONG)
netdev->stats.rx_length_errors++;
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);
+ netdev_dbg(netdev, "%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_dbg(netdev, "%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_dbg(netdev, "%s: entry\n", __func__);
netdev->stats.rx_errors++;
netdev->stats.rx_fifo_errors++;
}
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);
+ netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
/* Ack */
ks8842_write16(adapter, 18, isr, REG_ISR);
static irqreturn_t ks8842_irq(int irq, void *devid)
{
- struct ks8842_adapter *adapter = devid;
+ struct net_device *netdev = devid;
+ struct ks8842_adapter *adapter = netdev_priv(netdev);
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);
+ netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
if (isr) {
/* disable IRQ */
struct ks8842_adapter *adapter = netdev_priv(netdev);
int err;
- dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__);
+ netdev_dbg(netdev, "%s - entry\n", __func__);
/* reset the HW */
ks8842_reset_hw(adapter);
+ ks8842_write_mac_addr(adapter, netdev->dev_addr);
+
ks8842_update_link_status(netdev, adapter);
err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
- adapter);
+ netdev);
if (err) {
pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err);
return err;
{
struct ks8842_adapter *adapter = netdev_priv(netdev);
- dev_dbg(&adapter->pdev->dev, "%s - entry\n", __func__);
+ netdev_dbg(netdev, "%s - entry\n", __func__);
+
+ cancel_work_sync(&adapter->timeout_work);
/* free the irq */
- free_irq(adapter->irq, adapter);
+ free_irq(adapter->irq, netdev);
/* disable the switch */
ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE);
int ret;
struct ks8842_adapter *adapter = netdev_priv(netdev);
- dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+ netdev_dbg(netdev, "%s: entry\n", __func__);
ret = ks8842_tx_frame(skb, netdev);
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__);
+ netdev_dbg(netdev, "%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);
+ ks8842_write_mac_addr(adapter, mac);
return 0;
}
-static void ks8842_tx_timeout(struct net_device *netdev)
+static void ks8842_tx_timeout_work(struct work_struct *work)
{
- struct ks8842_adapter *adapter = netdev_priv(netdev);
+ struct ks8842_adapter *adapter =
+ container_of(work, struct ks8842_adapter, timeout_work);
+ struct net_device *netdev = adapter->netdev;
unsigned long flags;
- dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
+ netdev_dbg(netdev, "%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);
+
+ netif_stop_queue(netdev);
+
spin_unlock_irqrestore(&adapter->lock, flags);
ks8842_reset_hw(adapter);
+ ks8842_write_mac_addr(adapter, netdev->dev_addr);
+
ks8842_update_link_status(netdev, adapter);
}
+static void ks8842_tx_timeout(struct net_device *netdev)
+{
+ struct ks8842_adapter *adapter = netdev_priv(netdev);
+
+ netdev_dbg(netdev, "%s: entry\n", __func__);
+
+ schedule_work(&adapter->timeout_work);
+}
+
static const struct net_device_ops ks8842_netdev_ops = {
.ndo_open = ks8842_open,
.ndo_stop = ks8842_close,
struct resource *iomem;
struct net_device *netdev;
struct ks8842_adapter *adapter;
+ struct ks8842_platform_data *pdata = pdev->dev.platform_data;
u16 id;
+ unsigned i;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
SET_NETDEV_DEV(netdev, &pdev->dev);
adapter = netdev_priv(netdev);
+ adapter->netdev = netdev;
+ INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work);
adapter->hw_addr = ioremap(iomem->start, resource_size(iomem));
+ adapter->conf_flags = iomem->flags;
+
if (!adapter->hw_addr)
goto err_ioremap;
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);
+ /* Check if a mac address was given */
+ i = netdev->addr_len;
+ if (pdata) {
+ for (i = 0; i < netdev->addr_len; i++)
+ if (pdata->macaddr[i] != 0)
+ break;
+
+ if (i < netdev->addr_len)
+ /* an address was passed, use it */
+ memcpy(netdev->dev_addr, pdata->macaddr,
+ netdev->addr_len);
+ }
+
+ if (i == netdev->addr_len) {
+ ks8842_read_mac_addr(adapter, netdev->dev_addr);
+
+ if (!is_valid_ether_addr(netdev->dev_addr))
+ random_ether_addr(netdev->dev_addr);
+ }
id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
projects / karo-tx-linux.git / blobdiff