static int
ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
{
int timeout = 1000;
ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
if (!timeout--) {
printk("%s: setbuffer broken\n", dev->name);
priv(dev)->broken = 1;
return 1;
}
udelay(1);
}
if (read == buffer_read) {
ether3_outw(start, REG_DMAADDR);
ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
} else {
ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
ether3_outw(start, REG_DMAADDR);
}
return 0;
}
static irqreturn_t
ether3_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
unsigned int status, handled = IRQ_NONE;
#if NET_DEBUG > 1
if(net_debug & DEBUG_INT)
printk("eth3irq: %d ", irq);
#endif
status = ether3_inw(REG_STATUS);
if (status & STAT_INTRX) {
ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
ether3_rx(dev, 12);
handled = IRQ_HANDLED;
}
if (status & STAT_INTTX) {
ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
ether3_tx(dev);
handled = IRQ_HANDLED;
}
#if NET_DEBUG > 1
if(net_debug & DEBUG_INT)
printk("done\n");
#endif
return handled;
}
static void
ether3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *)dev_id;
struct dev_priv *priv;
unsigned int status;
#if NET_DEBUG > 1
if(net_debug & DEBUG_INT)
printk("eth3irq: %d ", irq);
#endif
priv = (struct dev_priv *)dev->priv;
status = ether3_inw(REG_STATUS);
if (status & STAT_INTRX) {
ether3_outw(CMD_ACKINTRX | priv->regs.command, REG_COMMAND);
ether3_rx(dev, priv, 12);
}
if (status & STAT_INTTX) {
ether3_outw(CMD_ACKINTTX | priv->regs.command, REG_COMMAND);
ether3_tx(dev, priv);
}
#if NET_DEBUG > 1
if(net_debug & DEBUG_INT)
printk("done\n");
#endif
}
/*
* Transmit a packet
*/
static int
ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
{
struct dev_priv *priv = (struct dev_priv *)dev->priv;
unsigned long flags;
unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned int ptr, next_ptr;
length = (length + 1) & ~1;
if (priv->broken) {
dev_kfree_skb(skb);
priv->stats.tx_dropped ++;
netif_start_queue(dev);
return 0;
}
next_ptr = (priv->tx_head + 1) & 15;
save_flags_cli(flags);
if (priv->tx_tail == next_ptr) {
restore_flags(flags);
return 1; /* unable to queue */
}
dev->trans_start = jiffies;
ptr = 0x600 * priv->tx_head;
priv->tx_head = next_ptr;
next_ptr *= 0x600;
#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
ether3_setbuffer(dev, buffer_write, next_ptr);
ether3_writelong(dev, 0);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writelong(dev, 0);
ether3_writebuffer(dev, skb->data, length);
ether3_writeword(dev, htons(next_ptr));
ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writeword(dev, htons((ptr + length + 4)));
ether3_writeword(dev, TXHDR_FLAGS >> 16);
ether3_ledon(dev, priv);
if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
ether3_outw(ptr, REG_TRANSMITPTR);
ether3_outw(priv->regs.command | CMD_TXON, REG_COMMAND);
}
next_ptr = (priv->tx_head + 1) & 15;
restore_flags(flags);
dev_kfree_skb(skb);
if (priv->tx_tail == next_ptr)
netif_stop_queue(dev);
return 0;
}
static inline int
ether3_probe_bus_16(struct net_device *dev, int val)
{
int read_val;
ether3_outw(val, REG_RECVPTR);
read_val = ether3_inw(REG_RECVPTR);
printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
return read_val == val;
}
static void ether3_timeout(struct net_device *dev)
{
unsigned long flags;
del_timer(&priv(dev)->timer);
local_irq_save(flags);
printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
priv(dev)->tx_head, priv(dev)->tx_tail);
ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
local_irq_restore(flags);
priv(dev)->regs.config2 |= CFG2_CTRLO;
dev->stats.tx_errors += 1;
ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
priv(dev)->tx_head = priv(dev)->tx_tail = 0;
netif_wake_queue(dev);
}
/*
* The inverse routine to ether3_open().
*/
static int
ether3_close(struct net_device *dev)
{
netif_stop_queue(dev);
disable_irq(dev->irq);
ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
priv(dev)->regs.command = 0;
while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
barrier();
ether3_outb(0x80, REG_CONFIG2 + 4);
ether3_outw(0, REG_COMMAND);
free_irq(dev->irq, dev);
return 0;
}
/*
* The inverse routine to ether3_open().
*/
static int
ether3_close(struct device *dev)
{
struct dev_priv *priv = (struct dev_priv *)dev->priv;
dev->tbusy = 1;
dev->start = 0;
disable_irq(dev->irq);
ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
priv->regs.command = 0;
while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON));
ether3_outb(0x80, REG_CONFIG2 + 1);
ether3_outw(0, REG_COMMAND);
free_irq(dev->irq, dev);
MOD_DEC_USE_COUNT;
return 0;
}
static void
ether3_init_for_open(struct net_device *dev)
{
struct dev_priv *priv = (struct dev_priv *)dev->priv;
int i;
memset(&priv->stats, 0, sizeof(struct net_device_stats));
/* Reset the chip */
ether3_outw(CFG2_RESET, REG_CONFIG2);
udelay(4);
priv->regs.command = 0;
ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON));
ether3_outw(priv->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
for (i = 0; i < 6; i++)
ether3_outb(dev->dev_addr[i], REG_BUFWIN);
priv->tx_head = 0;
priv->tx_tail = 0;
priv->regs.config2 |= CFG2_CTRLO;
priv->rx_head = RX_START;
ether3_outw(priv->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
ether3_outw(priv->rx_head, REG_RECVPTR);
ether3_outw(priv->rx_head >> 8, REG_RECVEND);
ether3_outw(0, REG_TRANSMITPTR);
ether3_outw(priv->regs.config2, REG_CONFIG2);
ether3_outw(priv->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
ether3_setbuffer(dev, buffer_write, 0);
ether3_writelong(dev, 0);
priv->regs.command = CMD_ENINTRX | CMD_ENINTTX;
ether3_outw(priv->regs.command | CMD_RXON, REG_COMMAND);
}
/*
* Transmit a packet
*/
static int
ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
{
unsigned long flags;
unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned int ptr, next_ptr;
if (priv(dev)->broken) {
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
netif_start_queue(dev);
return NETDEV_TX_OK;
}
length = (length + 1) & ~1;
if (length != skb->len) {
if (skb_padto(skb, length))
goto out;
}
next_ptr = (priv(dev)->tx_head + 1) & 15;
local_irq_save(flags);
if (priv(dev)->tx_tail == next_ptr) {
local_irq_restore(flags);
return NETDEV_TX_BUSY; /* unable to queue */
}
ptr = 0x600 * priv(dev)->tx_head;
priv(dev)->tx_head = next_ptr;
next_ptr *= 0x600;
#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
ether3_setbuffer(dev, buffer_write, next_ptr);
ether3_writelong(dev, 0);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writelong(dev, 0);
ether3_writebuffer(dev, skb->data, length);
ether3_writeword(dev, htons(next_ptr));
ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writeword(dev, htons((ptr + length + 4)));
ether3_writeword(dev, TXHDR_FLAGS >> 16);
ether3_ledon(dev);
if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
ether3_outw(ptr, REG_TRANSMITPTR);
ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
}
next_ptr = (priv(dev)->tx_head + 1) & 15;
local_irq_restore(flags);
dev_kfree_skb(skb);
if (priv(dev)->tx_tail == next_ptr)
netif_stop_queue(dev);
out:
return NETDEV_TX_OK;
}
/*
* Transmit a packet
*/
static int
ether3_sendpacket(struct sk_buff *skb, struct device *dev)
{
struct dev_priv *priv = (struct dev_priv *)dev->priv;
retry:
if (!dev->tbusy) {
/* Block a timer-based transmit from overlapping. This could better be
* done with atomic_swap(1, dev->tbusy), but set_bit() works as well.
*/
if (!test_and_set_bit(0, (void *)&dev->tbusy)) {
unsigned long flags;
unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned int ptr, next_ptr;
length = (length + 1) & ~1;
if (priv->broken) {
dev_kfree_skb(skb);
priv->stats.tx_dropped ++;
dev->tbusy = 0;
return 0;
}
next_ptr = (priv->tx_head + 1) & 15;
save_flags_cli(flags);
if (priv->tx_tail == next_ptr) {
restore_flags(flags);
return 1; /* unable to queue */
}
dev->trans_start = jiffies;
ptr = 0x600 * priv->tx_head;
priv->tx_head = next_ptr;
next_ptr *= 0x600;
#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
ether3_setbuffer(dev, buffer_write, next_ptr);
ether3_writelong(dev, 0);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writelong(dev, 0);
ether3_writebuffer(dev, skb->data, length);
ether3_writeword(dev, htons(next_ptr));
ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writeword(dev, htons((ptr + length + 4)));
ether3_writeword(dev, TXHDR_FLAGS >> 16);
ether3_ledon(dev, priv);
if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
ether3_outw(ptr, REG_TRANSMITPTR);
ether3_outw(priv->regs.command | CMD_TXON, REG_COMMAND);
}
next_ptr = (priv->tx_head + 1) & 15;
if (priv->tx_tail != next_ptr)
dev->tbusy = 0;
restore_flags(flags);
dev_kfree_skb(skb);
return 0;
} else {