/*
* free all resources used by the channels and switch off leds and can power
*/
static void pcan_free_channels(struct pcan_pccard *card)
{
int i;
u8 led_mask = 0;
for (i = 0; i < card->chan_count; i++) {
struct net_device *netdev;
char name[IFNAMSIZ];
led_mask |= PCC_LED(i);
netdev = card->channel[i].netdev;
if (!netdev)
continue;
strncpy(name, netdev->name, IFNAMSIZ);
unregister_sja1000dev(netdev);
free_sja1000dev(netdev);
dev_info(&card->pdev->dev, "%s removed\n", name);
}
/* do it only if device not removed */
if (pcan_pccard_present(card)) {
pcan_set_leds(card, led_mask, PCC_LED_OFF);
pcan_set_can_power(card, 0);
}
}
static irqreturn_t pcan_isr(int irq, void *dev_id)
{
struct pcan_pccard *card = dev_id;
int irq_handled;
for (irq_handled = 0; irq_handled < PCC_ISR_MAX_LOOP; irq_handled++) {
int nothing_to_handle = 1;
int i;
for (i = 0; i < card->chan_count; i++) {
struct net_device *netdev;
if (!pcan_pccard_present(card)) {
return IRQ_NONE;
}
netdev = card->channel[i].netdev;
if (netdev &&
sja1000_interrupt(irq, netdev) == IRQ_HANDLED)
nothing_to_handle = 0;
}
if (nothing_to_handle)
break;
}
return (irq_handled) ? IRQ_HANDLED : IRQ_NONE;
}
/*
* interrupt service routine
*/
static irqreturn_t pcan_isr(int irq, void *dev_id)
{
struct pcan_pccard *card = dev_id;
int irq_handled;
/* prevent from infinite loop */
for (irq_handled = 0; irq_handled < PCC_ISR_MAX_LOOP; irq_handled++) {
/* handle shared interrupt and next loop */
int nothing_to_handle = 1;
int i;
/* check interrupt for each channel */
for (i = 0; i < card->chan_count; i++) {
struct net_device *netdev;
/*
* check whether the card is present before calling
* sja1000_interrupt() to speed up hotplug detection
*/
if (!pcan_pccard_present(card)) {
/* card unplugged during isr */
return IRQ_NONE;
}
/*
* should check whether all or SJA1000_MAX_IRQ
* interrupts have been handled: loop again to be sure.
*/
netdev = card->channel[i].netdev;
if (netdev &&
sja1000_interrupt(irq, netdev) == IRQ_HANDLED)
nothing_to_handle = 0;
}
if (nothing_to_handle)
break;
}
return (irq_handled) ? IRQ_HANDLED : IRQ_NONE;
}