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ARM: at91: remove old irq material
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Remove all the material related to AIC5 support: this interrupt controller
driver is now implemented in drivers/irqchip/atmel-aic.c.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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Boris BREZILLON authored and Nicolas Ferre committed Aug 19, 2014
1 parent 3b26f39 commit 2626063
Showing 1 changed file with 6 additions and 264 deletions.
270 changes: 6 additions & 264 deletions arch/arm/mach-at91/irq.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,11 +48,6 @@ void __iomem *at91_aic_base;
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

Expand Down Expand Up @@ -92,50 +87,14 @@ static int at91_aic_set_wake(struct irq_data *d, unsigned value)

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
Expand Down Expand Up @@ -169,21 +128,6 @@ at91_aic_handle_irq(struct pt_regs *regs)
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 */
Expand All @@ -192,15 +136,6 @@ static void at91_aic_mask_irq(struct irq_data *d)
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 */
Expand All @@ -209,15 +144,6 @@ static void at91_aic_unmask_irq(struct irq_data *d)
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)
{
/*
Expand All @@ -227,11 +153,6 @@ 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)
Expand Down Expand Up @@ -282,16 +203,8 @@ static int at91_aic_set_type(struct irq_data *d, unsigned type)
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;
}
Expand Down Expand Up @@ -331,177 +244,6 @@ static void __init at91_aic_hw_init(unsigned int spu_vector)
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.
*/
Expand Down

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