/* This is the interrupt service routine. It handles all interrupts
* sent to this device. Note that on CE4100, this is a shared
* interrupt.
*/
static irqreturn_t denali_isr(int irq, void *dev_id)
{
struct denali_nand_info *denali = dev_id;
uint32_t irq_status = 0x0;
irqreturn_t result = IRQ_NONE;
spin_lock(&denali->irq_lock);
/* check to see if a valid NAND chip has
* been selected.
*/
if (is_flash_bank_valid(denali->flash_bank)) {
/* check to see if controller generated
* the interrupt, since this is a shared interrupt */
irq_status = denali_irq_detected(denali);
if (irq_status != 0) {
/* handle interrupt */
/* first acknowledge it */
clear_interrupt(denali, irq_status);
/* store the status in the device context for someone
to read */
denali->irq_status |= irq_status;
/* notify anyone who cares that it happened */
complete(&denali->complete);
/* tell the OS that we've handled this */
result = IRQ_HANDLED;
}
}
spin_unlock(&denali->irq_lock);
return result;
}
static uint32_t wait_for_irq(struct denali_nand_info *denali, uint32_t irq_mask)
{
uint32_t intr_status = 0;
uint64_t start;
if (!is_flash_bank_valid(denali->flash_bank)) {
dev_dbg(denali->dev, "No valid chip selected (%d)\n",
denali->flash_bank);
return 0;
}
start = get_time_ns();
while (!is_timeout(start, 1000 * MSECOND)) {
intr_status = read_interrupt_status(denali);
if (intr_status != 0)
clear_interrupt(denali, intr_status);
if (intr_status & irq_mask)
return intr_status;
}
/* timeout */
dev_dbg(denali->dev, "timeout occurred, status = 0x%x, mask = 0x%x\n",
intr_status, irq_mask);
return 0;
}
static irqreturn_t denali_isr(int irq, void *dev_id)
{
struct denali_nand_info *denali = dev_id;
uint32_t irq_status = 0x0;
irqreturn_t result = IRQ_NONE;
spin_lock(&denali->irq_lock);
if (is_flash_bank_valid(denali->flash_bank)) {
irq_status = denali_irq_detected(denali);
if (irq_status != 0) {
clear_interrupt(denali, irq_status);
denali->irq_status |= irq_status;
complete(&denali->complete);
result = IRQ_HANDLED;
}
}
spin_unlock(&denali->irq_lock);
return result;
}