static asmlinkage void __exception_irq_entry
omap_intc_handle_irq(struct pt_regs *regs)
{
u32 irqnr = 0;
int handled_irq = 0;
int i;
do {
for (i = 0; i < omap_nr_pending; i++) {
irqnr = intc_readl(INTC_PENDING_IRQ0 + (0x20 * i));
if (irqnr)
goto out;
}
out:
if (!irqnr)
break;
irqnr = intc_readl(INTC_SIR);
irqnr &= ACTIVEIRQ_MASK;
if (irqnr) {
handle_domain_irq(domain, irqnr, regs);
handled_irq = 1;
}
} while (irqnr);
/*
* If an irq is masked or deasserted while active, we will
* keep ending up here with no irq handled. So remove it from
* the INTC with an ack.
*/
if (!handled_irq)
omap_ack_irq(NULL);
}
/*
* All interrupts go via intc at some point.
*/
asmlinkage void do_IRQ(int level, struct pt_regs *regs)
{
struct irq_desc *desc;
struct pt_regs *old_regs;
unsigned int irq;
unsigned long status_reg;
local_irq_disable();
old_regs = set_irq_regs(regs);
irq_enter();
irq = intc_readl(&intc0, INTCAUSE0 - 4 * level);
desc = irq_desc + irq;
desc->handle_irq(irq, desc);
/*
* Clear all interrupt level masks so that we may handle
* interrupts during softirq processing. If this is a nested
* interrupt, interrupts must stay globally disabled until we
* return.
*/
status_reg = sysreg_read(SR);
status_reg &= ~(SYSREG_BIT(I0M) | SYSREG_BIT(I1M)
| SYSREG_BIT(I2M) | SYSREG_BIT(I3M));
sysreg_write(SR, status_reg);
irq_exit();
set_irq_regs(old_regs);
}
static void __init omap_irq_enable_protection(void)
{
u32 reg;
reg = intc_readl(INTC_PROTECTION);
reg |= INTC_PROTECTION_ENABLE;
intc_writel(INTC_PROTECTION, reg);
}
int omap_irq_pending(void)
{
int i;
for (i = 0; i < omap_nr_pending; i++)
if (intc_readl(INTC_PENDING_IRQ0 + (0x20 * i)))
return 1;
return 0;
}
static asmlinkage void __exception_irq_entry
omap_intc_handle_irq(struct pt_regs *regs)
{
u32 irqnr;
irqnr = intc_readl(INTC_SIR);
irqnr &= ACTIVEIRQ_MASK;
WARN_ONCE(!irqnr, "Spurious IRQ ?\n");
handle_domain_irq(domain, irqnr, regs);
}
static void __init omap_irq_soft_reset(void)
{
unsigned long tmp;
tmp = intc_readl(INTC_REVISION) & 0xff;
pr_info("IRQ: Found an INTC at 0x%p (revision %ld.%ld) with %d interrupts\n",
omap_irq_base, tmp >> 4, tmp & 0xf, omap_nr_irqs);
tmp = intc_readl(INTC_SYSCONFIG);
tmp |= 1 << 1; /* soft reset */
intc_writel(INTC_SYSCONFIG, tmp);
while (!(intc_readl(INTC_SYSSTATUS) & 0x1))
/* Wait for reset to complete */;
/* Enable autoidle */
intc_writel(INTC_SYSCONFIG, 1 << 0);
}
void __init init_IRQ(void)
{
extern void _evba(void);
extern void irq_level0(void);
struct resource *regs;
struct clk *pclk;
unsigned int i;
u32 offset, readback;
regs = platform_get_resource(&at32_intc0_device, IORESOURCE_MEM, 0);
if (!regs) {
printk(KERN_EMERG "intc: no mmio resource defined\n");
goto fail;
}
pclk = clk_get(&at32_intc0_device.dev, "pclk");
if (IS_ERR(pclk)) {
printk(KERN_EMERG "intc: no clock defined\n");
goto fail;
}
clk_enable(pclk);
intc0.regs = ioremap(regs->start, regs->end - regs->start + 1);
if (!intc0.regs) {
printk(KERN_EMERG "intc: failed to map registers (0x%08lx)\n",
(unsigned long)regs->start);
goto fail;
}
/*
* Initialize all interrupts to level 0 (lowest priority). The
* priority level may be changed by calling
* irq_set_priority().
*
*/
offset = (unsigned long)&irq_level0 - (unsigned long)&_evba;
for (i = 0; i < NR_INTERNAL_IRQS; i++) {
intc_writel(&intc0, INTPR0 + 4 * i, offset);
readback = intc_readl(&intc0, INTPR0 + 4 * i);
if (readback == offset)
set_irq_chip_and_handler(i, &intc0.chip,
handle_simple_irq);
}
/* Unmask all interrupt levels */
sysreg_write(SR, (sysreg_read(SR)
& ~(SR_I3M | SR_I2M | SR_I1M | SR_I0M)));
return;
fail:
panic("Interrupt controller initialization failed!\n");
}
static int intc_suspend(void)
{
int i;
if (unlikely(!irqs_disabled())) {
pr_err("intc_suspend: called with interrupts enabled\n");
return -EINVAL;
}
if (unlikely(!intc0.suspend_ipr)) {
pr_err("intc_suspend: suspend_ipr not initialized\n");
return -EINVAL;
}
for (i = 0; i < 64; i++) {
intc0.saved_ipr[i] = intc_readl(&intc0, INTPR0 + 4 * i);
intc_writel(&intc0, INTPR0 + 4 * i, intc0.suspend_ipr);
}
return 0;
}
static int intc_suspend(struct sys_device *sdev, pm_message_t state)
{
struct intc *intc = container_of(sdev, struct intc, sysdev);
int i;
if (unlikely(!irqs_disabled())) {
pr_err("intc_suspend: called with interrupts enabled\n");
return -EINVAL;
}
if (unlikely(!intc->suspend_ipr)) {
pr_err("intc_suspend: suspend_ipr not initialized\n");
return -EINVAL;
}
for (i = 0; i < 64; i++) {
intc->saved_ipr[i] = intc_readl(intc, INTPR0 + 4 * i);
intc_writel(intc, INTPR0 + 4 * i, intc->suspend_ipr);
}
return 0;
}
asmlinkage void do_IRQ(int level, struct pt_regs *regs)
{
struct pt_regs *old_regs;
unsigned int irq;
unsigned long status_reg;
local_irq_disable();
old_regs = set_irq_regs(regs);
irq_enter();
irq = intc_readl(&intc0, INTCAUSE0 - 4 * level);
generic_handle_irq(irq);
status_reg = sysreg_read(SR);
status_reg &= ~(SYSREG_BIT(I0M) | SYSREG_BIT(I1M)
| SYSREG_BIT(I2M) | SYSREG_BIT(I3M));
sysreg_write(SR, status_reg);
irq_exit();
set_irq_regs(old_regs);
}
void omap_intc_save_context(void)
{
int i;
intc_context.sysconfig =
intc_readl(INTC_SYSCONFIG);
intc_context.protection =
intc_readl(INTC_PROTECTION);
intc_context.idle =
intc_readl(INTC_IDLE);
intc_context.threshold =
intc_readl(INTC_THRESHOLD);
for (i = 0; i < omap_nr_irqs; i++)
intc_context.ilr[i] =
intc_readl((INTC_ILR0 + 0x4 * i));
for (i = 0; i < INTCPS_NR_MIR_REGS; i++)
intc_context.mir[i] =
intc_readl(INTC_MIR0 + (0x20 * i));
}
unsigned long intc_get_pending(unsigned int group)
{
return intc_readl(&intc0, INTREQ0 + 4 * group);
}