netif_wake_queue(dev);
}
-/*--------------------------------------------------------------------
- .
- . This is the main routine of the driver, to handle the device when
- . it needs some attention.
- .
- . So:
- . first, save state of the chipset
- . branch off into routines to handle each case, and acknowledge
- . each to the interrupt register
- . and finally restore state.
- .
- ---------------------------------------------------------------------*/
-
-static irqreturn_t smc_interrupt(int irq, void * dev_id, struct pt_regs * regs)
-{
- struct net_device *dev = dev_id;
- int ioaddr = dev->base_addr;
- struct smc_local *lp = netdev_priv(dev);
-
- byte status;
- word card_stats;
- byte mask;
- int timeout;
- /* state registers */
- word saved_bank;
- word saved_pointer;
- int handled = 0;
-
-
- PRINTK3((CARDNAME": SMC interrupt started \n"));
-
- saved_bank = inw( ioaddr + BANK_SELECT );
-
- SMC_SELECT_BANK(2);
- saved_pointer = inw( ioaddr + POINTER );
-
- mask = inb( ioaddr + INT_MASK );
- /* clear all interrupts */
- outb( 0, ioaddr + INT_MASK );
-
-
- /* set a timeout value, so I don't stay here forever */
- timeout = 4;
-
- PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x \n", mask ));
- do {
- /* read the status flag, and mask it */
- status = inb( ioaddr + INTERRUPT ) & mask;
- if (!status )
- break;
-
- handled = 1;
-
- PRINTK3((KERN_WARNING CARDNAME
- ": Handling interrupt status %x \n", status ));
-
- if (status & IM_RCV_INT) {
- /* Got a packet(s). */
- PRINTK2((KERN_WARNING CARDNAME
- ": Receive Interrupt\n"));
- smc_rcv(dev);
- } else if (status & IM_TX_INT ) {
- PRINTK2((KERN_WARNING CARDNAME
- ": TX ERROR handled\n"));
- smc_tx(dev);
- outb(IM_TX_INT, ioaddr + INTERRUPT );
- } else if (status & IM_TX_EMPTY_INT ) {
- /* update stats */
- SMC_SELECT_BANK( 0 );
- card_stats = inw( ioaddr + COUNTER );
- /* single collisions */
- lp->stats.collisions += card_stats & 0xF;
- card_stats >>= 4;
- /* multiple collisions */
- lp->stats.collisions += card_stats & 0xF;
-
- /* these are for when linux supports these statistics */
-
- SMC_SELECT_BANK( 2 );
- PRINTK2((KERN_WARNING CARDNAME
- ": TX_BUFFER_EMPTY handled\n"));
- outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
- mask &= ~IM_TX_EMPTY_INT;
- lp->stats.tx_packets += lp->packets_waiting;
- lp->packets_waiting = 0;
-
- } else if (status & IM_ALLOC_INT ) {
- PRINTK2((KERN_DEBUG CARDNAME
- ": Allocation interrupt \n"));
- /* clear this interrupt so it doesn't happen again */
- mask &= ~IM_ALLOC_INT;
-
- smc_hardware_send_packet( dev );
-
- /* enable xmit interrupts based on this */
- mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
-
- /* and let the card send more packets to me */
- netif_wake_queue(dev);
-
- PRINTK2((CARDNAME": Handoff done successfully.\n"));
- } else if (status & IM_RX_OVRN_INT ) {
- lp->stats.rx_errors++;
- lp->stats.rx_fifo_errors++;
- outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
- } else if (status & IM_EPH_INT ) {
- PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT \n"));
- } else if (status & IM_ERCV_INT ) {
- PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT \n"));
- outb( IM_ERCV_INT, ioaddr + INTERRUPT );
- }
- } while ( timeout -- );
-
-
- /* restore state register */
- SMC_SELECT_BANK( 2 );
- outb( mask, ioaddr + INT_MASK );
-
- PRINTK3(( KERN_WARNING CARDNAME ": MASK is now %x \n", mask ));
- outw( saved_pointer, ioaddr + POINTER );
-
- SMC_SELECT_BANK( saved_bank );
-
- PRINTK3((CARDNAME ": Interrupt done\n"));
- return IRQ_RETVAL(handled);
-}
-
/*-------------------------------------------------------------
.
. smc_rcv - receive a packet from the card
return;
}
+/*--------------------------------------------------------------------
+ .
+ . This is the main routine of the driver, to handle the device when
+ . it needs some attention.
+ .
+ . So:
+ . first, save state of the chipset
+ . branch off into routines to handle each case, and acknowledge
+ . each to the interrupt register
+ . and finally restore state.
+ .
+ ---------------------------------------------------------------------*/
+
+static irqreturn_t smc_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+ struct net_device *dev = dev_id;
+ int ioaddr = dev->base_addr;
+ struct smc_local *lp = netdev_priv(dev);
+
+ byte status;
+ word card_stats;
+ byte mask;
+ int timeout;
+ /* state registers */
+ word saved_bank;
+ word saved_pointer;
+ int handled = 0;
+
+
+ PRINTK3((CARDNAME": SMC interrupt started \n"));
+
+ saved_bank = inw( ioaddr + BANK_SELECT );
+
+ SMC_SELECT_BANK(2);
+ saved_pointer = inw( ioaddr + POINTER );
+
+ mask = inb( ioaddr + INT_MASK );
+ /* clear all interrupts */
+ outb( 0, ioaddr + INT_MASK );
+
+
+ /* set a timeout value, so I don't stay here forever */
+ timeout = 4;
+
+ PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x \n", mask ));
+ do {
+ /* read the status flag, and mask it */
+ status = inb( ioaddr + INTERRUPT ) & mask;
+ if (!status )
+ break;
+
+ handled = 1;
+
+ PRINTK3((KERN_WARNING CARDNAME
+ ": Handling interrupt status %x \n", status ));
+
+ if (status & IM_RCV_INT) {
+ /* Got a packet(s). */
+ PRINTK2((KERN_WARNING CARDNAME
+ ": Receive Interrupt\n"));
+ smc_rcv(dev);
+ } else if (status & IM_TX_INT ) {
+ PRINTK2((KERN_WARNING CARDNAME
+ ": TX ERROR handled\n"));
+ smc_tx(dev);
+ outb(IM_TX_INT, ioaddr + INTERRUPT );
+ } else if (status & IM_TX_EMPTY_INT ) {
+ /* update stats */
+ SMC_SELECT_BANK( 0 );
+ card_stats = inw( ioaddr + COUNTER );
+ /* single collisions */
+ lp->stats.collisions += card_stats & 0xF;
+ card_stats >>= 4;
+ /* multiple collisions */
+ lp->stats.collisions += card_stats & 0xF;
+
+ /* these are for when linux supports these statistics */
+
+ SMC_SELECT_BANK( 2 );
+ PRINTK2((KERN_WARNING CARDNAME
+ ": TX_BUFFER_EMPTY handled\n"));
+ outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
+ mask &= ~IM_TX_EMPTY_INT;
+ lp->stats.tx_packets += lp->packets_waiting;
+ lp->packets_waiting = 0;
+
+ } else if (status & IM_ALLOC_INT ) {
+ PRINTK2((KERN_DEBUG CARDNAME
+ ": Allocation interrupt \n"));
+ /* clear this interrupt so it doesn't happen again */
+ mask &= ~IM_ALLOC_INT;
+
+ smc_hardware_send_packet( dev );
+
+ /* enable xmit interrupts based on this */
+ mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
+
+ /* and let the card send more packets to me */
+ netif_wake_queue(dev);
+
+ PRINTK2((CARDNAME": Handoff done successfully.\n"));
+ } else if (status & IM_RX_OVRN_INT ) {
+ lp->stats.rx_errors++;
+ lp->stats.rx_fifo_errors++;
+ outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
+ } else if (status & IM_EPH_INT ) {
+ PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT \n"));
+ } else if (status & IM_ERCV_INT ) {
+ PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT \n"));
+ outb( IM_ERCV_INT, ioaddr + INTERRUPT );
+ }
+ } while ( timeout -- );
+
+
+ /* restore state register */
+ SMC_SELECT_BANK( 2 );
+ outb( mask, ioaddr + INT_MASK );
+
+ PRINTK3(( KERN_WARNING CARDNAME ": MASK is now %x \n", mask ));
+ outw( saved_pointer, ioaddr + POINTER );
+
+ SMC_SELECT_BANK( saved_bank );
+
+ PRINTK3((CARDNAME ": Interrupt done\n"));
+ return IRQ_RETVAL(handled);
+}
+
+
/*----------------------------------------------------
. smc_close
.
git://git.onelab.eu / linux-2.6.git / blobdiff