static struct irq_domain *at91_aic_domain;
static struct device_node *at91_aic_np;
static unsigned int n_irqs = NR_AIC_IRQS;
-static unsigned long at91_aic_caps = 0;
-
-/* AIC5 introduces a Source Select Register */
-#define AT91_AIC_CAP_AIC5 (1 << 0)
-#define has_aic5() (at91_aic_caps & AT91_AIC_CAP_AIC5)
#ifdef CONFIG_PM
void at91_irq_suspend(void)
{
- int bit = -1;
-
- if (has_aic5()) {
- /* disable enabled irqs */
- while ((bit = find_next_bit(backups, n_irqs, bit + 1)) < n_irqs) {
- at91_aic_write(AT91_AIC5_SSR,
- bit & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IDCR, 1);
- }
- /* enable wakeup irqs */
- bit = -1;
- while ((bit = find_next_bit(wakeups, n_irqs, bit + 1)) < n_irqs) {
- at91_aic_write(AT91_AIC5_SSR,
- bit & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IECR, 1);
- }
- } else {
- at91_aic_write(AT91_AIC_IDCR, *backups);
- at91_aic_write(AT91_AIC_IECR, *wakeups);
- }
+ at91_aic_write(AT91_AIC_IDCR, *backups);
+ at91_aic_write(AT91_AIC_IECR, *wakeups);
}
void at91_irq_resume(void)
{
- int bit = -1;
-
- if (has_aic5()) {
- /* disable wakeup irqs */
- while ((bit = find_next_bit(wakeups, n_irqs, bit + 1)) < n_irqs) {
- at91_aic_write(AT91_AIC5_SSR,
- bit & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IDCR, 1);
- }
- /* enable irqs disabled for suspend */
- bit = -1;
- while ((bit = find_next_bit(backups, n_irqs, bit + 1)) < n_irqs) {
- at91_aic_write(AT91_AIC5_SSR,
- bit & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IECR, 1);
- }
- } else {
- at91_aic_write(AT91_AIC_IDCR, *wakeups);
- at91_aic_write(AT91_AIC_IECR, *backups);
- }
+ at91_aic_write(AT91_AIC_IDCR, *wakeups);
+ at91_aic_write(AT91_AIC_IECR, *backups);
}
#else
handle_IRQ(irqnr, regs);
}
-asmlinkage void __exception_irq_entry
-at91_aic5_handle_irq(struct pt_regs *regs)
-{
- u32 irqnr;
- u32 irqstat;
-
- irqnr = at91_aic_read(AT91_AIC5_IVR);
- irqstat = at91_aic_read(AT91_AIC5_ISR);
-
- if (!irqstat)
- at91_aic_write(AT91_AIC5_EOICR, 0);
- else
- handle_IRQ(irqnr, regs);
-}
-
static void at91_aic_mask_irq(struct irq_data *d)
{
/* Disable interrupt on AIC */
clear_backup(d->hwirq);
}
-static void __maybe_unused at91_aic5_mask_irq(struct irq_data *d)
-{
- /* Disable interrupt on AIC5 */
- at91_aic_write(AT91_AIC5_SSR, d->hwirq & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IDCR, 1);
- /* Update ISR cache */
- clear_backup(d->hwirq);
-}
-
static void at91_aic_unmask_irq(struct irq_data *d)
{
/* Enable interrupt on AIC */
set_backup(d->hwirq);
}
-static void __maybe_unused at91_aic5_unmask_irq(struct irq_data *d)
-{
- /* Enable interrupt on AIC5 */
- at91_aic_write(AT91_AIC5_SSR, d->hwirq & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IECR, 1);
- /* Update ISR cache */
- set_backup(d->hwirq);
-}
-
static void at91_aic_eoi(struct irq_data *d)
{
/*
at91_aic_write(AT91_AIC_EOICR, 0);
}
-static void __maybe_unused at91_aic5_eoi(struct irq_data *d)
-{
- at91_aic_write(AT91_AIC5_EOICR, 0);
-}
-
static unsigned long *at91_extern_irq;
u32 at91_get_extern_irq(void)
if (srctype < 0)
return srctype;
- if (has_aic5()) {
- at91_aic_write(AT91_AIC5_SSR,
- d->hwirq & AT91_AIC5_INTSEL_MSK);
- smr = at91_aic_read(AT91_AIC5_SMR) & ~AT91_AIC_SRCTYPE;
- at91_aic_write(AT91_AIC5_SMR, smr | srctype);
- } else {
- smr = at91_aic_read(AT91_AIC_SMR(d->hwirq))
- & ~AT91_AIC_SRCTYPE;
- at91_aic_write(AT91_AIC_SMR(d->hwirq), smr | srctype);
- }
+ smr = at91_aic_read(AT91_AIC_SMR(d->hwirq)) & ~AT91_AIC_SRCTYPE;
+ at91_aic_write(AT91_AIC_SMR(d->hwirq), smr | srctype);
return 0;
}
at91_aic_write(AT91_AIC_ICCR, 0xFFFFFFFF);
}
-static void __init __maybe_unused at91_aic5_hw_init(unsigned int spu_vector)
-{
- int i;
-
- /*
- * Perform 8 End Of Interrupt Command to make sure AIC
- * will not Lock out nIRQ
- */
- for (i = 0; i < 8; i++)
- at91_aic_write(AT91_AIC5_EOICR, 0);
-
- /*
- * Spurious Interrupt ID in Spurious Vector Register.
- * When there is no current interrupt, the IRQ Vector Register
- * reads the value stored in AIC_SPU
- */
- at91_aic_write(AT91_AIC5_SPU, spu_vector);
-
- /* No debugging in AIC: Debug (Protect) Control Register */
- at91_aic_write(AT91_AIC5_DCR, 0);
-
- /* Disable and clear all interrupts initially */
- for (i = 0; i < n_irqs; i++) {
- at91_aic_write(AT91_AIC5_SSR, i & AT91_AIC5_INTSEL_MSK);
- at91_aic_write(AT91_AIC5_IDCR, 1);
- at91_aic_write(AT91_AIC5_ICCR, 1);
- }
-}
-
-#if defined(CONFIG_OF)
-static unsigned int *at91_aic_irq_priorities;
-
-static int at91_aic_irq_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- /* Put virq number in Source Vector Register */
- at91_aic_write(AT91_AIC_SVR(hw), virq);
-
- /* Active Low interrupt, with priority */
- at91_aic_write(AT91_AIC_SMR(hw),
- AT91_AIC_SRCTYPE_LOW | at91_aic_irq_priorities[hw]);
-
- irq_set_chip_and_handler(virq, &at91_aic_chip, handle_fasteoi_irq);
- set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
-
- return 0;
-}
-
-static int at91_aic5_irq_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- at91_aic_write(AT91_AIC5_SSR, hw & AT91_AIC5_INTSEL_MSK);
-
- /* Put virq number in Source Vector Register */
- at91_aic_write(AT91_AIC5_SVR, virq);
-
- /* Active Low interrupt, with priority */
- at91_aic_write(AT91_AIC5_SMR,
- AT91_AIC_SRCTYPE_LOW | at91_aic_irq_priorities[hw]);
-
- irq_set_chip_and_handler(virq, &at91_aic_chip, handle_fasteoi_irq);
- set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
-
- return 0;
-}
-
-static int at91_aic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,
- const u32 *intspec, unsigned int intsize,
- irq_hw_number_t *out_hwirq, unsigned int *out_type)
-{
- if (WARN_ON(intsize < 3))
- return -EINVAL;
- if (WARN_ON(intspec[0] >= n_irqs))
- return -EINVAL;
- if (WARN_ON((intspec[2] < AT91_AIC_IRQ_MIN_PRIORITY)
- || (intspec[2] > AT91_AIC_IRQ_MAX_PRIORITY)))
- return -EINVAL;
-
- *out_hwirq = intspec[0];
- *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
- at91_aic_irq_priorities[*out_hwirq] = intspec[2];
-
- return 0;
-}
-
-static struct irq_domain_ops at91_aic_irq_ops = {
- .map = at91_aic_irq_map,
- .xlate = at91_aic_irq_domain_xlate,
-};
-
-int __init at91_aic_of_common_init(struct device_node *node,
- struct device_node *parent)
-{
- struct property *prop;
- const __be32 *p;
- u32 val;
-
- at91_extern_irq = kzalloc(BITS_TO_LONGS(n_irqs)
- * sizeof(*at91_extern_irq), GFP_KERNEL);
- if (!at91_extern_irq)
- return -ENOMEM;
-
- if (at91_aic_pm_init()) {
- kfree(at91_extern_irq);
- return -ENOMEM;
- }
-
- at91_aic_irq_priorities = kzalloc(n_irqs
- * sizeof(*at91_aic_irq_priorities),
- GFP_KERNEL);
- if (!at91_aic_irq_priorities)
- return -ENOMEM;
-
- at91_aic_base = of_iomap(node, 0);
- at91_aic_np = node;
-
- at91_aic_domain = irq_domain_add_linear(at91_aic_np, n_irqs,
- &at91_aic_irq_ops, NULL);
- if (!at91_aic_domain)
- panic("Unable to add AIC irq domain (DT)\n");
-
- of_property_for_each_u32(node, "atmel,external-irqs", prop, p, val) {
- if (val >= n_irqs)
- pr_warn("AIC: external irq %d >= %d skip it\n",
- val, n_irqs);
- else
- set_bit(val, at91_extern_irq);
- }
-
- irq_set_default_host(at91_aic_domain);
-
- return 0;
-}
-
-int __init at91_aic_of_init(struct device_node *node,
- struct device_node *parent)
-{
- int err;
-
- err = at91_aic_of_common_init(node, parent);
- if (err)
- return err;
-
- at91_aic_hw_init(n_irqs);
-
- return 0;
-}
-
-int __init at91_aic5_of_init(struct device_node *node,
- struct device_node *parent)
-{
- int err;
-
- at91_aic_caps |= AT91_AIC_CAP_AIC5;
- n_irqs = NR_AIC5_IRQS;
- at91_aic_chip.irq_ack = at91_aic5_mask_irq;
- at91_aic_chip.irq_mask = at91_aic5_mask_irq;
- at91_aic_chip.irq_unmask = at91_aic5_unmask_irq;
- at91_aic_chip.irq_eoi = at91_aic5_eoi;
- at91_aic_irq_ops.map = at91_aic5_irq_map;
-
- err = at91_aic_of_common_init(node, parent);
- if (err)
- return err;
-
- at91_aic5_hw_init(n_irqs);
-
- return 0;
-}
-#endif
-
/*
* Initialize the AIC interrupt controller.
*/
projects / platform / kernel / linux-rpi.git / commitdiff