#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kconfig.h>
+#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#define IRQSTAT 0x04
#define MAX_WORDS 4
+#define MAX_MAPPINGS (MAX_WORDS * 2)
#define IRQS_PER_WORD 32
struct bcm7120_l2_intc_data {
unsigned int n_words;
- void __iomem *base[MAX_WORDS];
+ void __iomem *map_base[MAX_MAPPINGS];
+ void __iomem *pair_base[MAX_WORDS];
+ int en_offset[MAX_WORDS];
+ int stat_offset[MAX_WORDS];
struct irq_domain *domain;
bool can_wake;
u32 irq_fwd_mask[MAX_WORDS];
u32 irq_map_mask[MAX_WORDS];
+ int num_parent_irqs;
+ const __be32 *map_mask_prop;
};
static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
int hwirq;
irq_gc_lock(gc);
- pending = irq_reg_readl(gc, IRQSTAT) & gc->mask_cache;
+ pending = irq_reg_readl(gc, b->stat_offset[idx]) &
+ gc->mask_cache;
irq_gc_unlock(gc);
for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) {
static void bcm7120_l2_intc_suspend(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct bcm7120_l2_intc_data *b = gc->private;
irq_gc_lock(gc);
if (b->can_wake)
- irq_reg_writel(gc, gc->mask_cache | gc->wake_active, IRQEN);
+ irq_reg_writel(gc, gc->mask_cache | gc->wake_active,
+ ct->regs.mask);
irq_gc_unlock(gc);
}
static void bcm7120_l2_intc_resume(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
/* Restore the saved mask */
irq_gc_lock(gc);
- irq_reg_writel(gc, gc->mask_cache, IRQEN);
+ irq_reg_writel(gc, gc->mask_cache, ct->regs.mask);
irq_gc_unlock(gc);
}
static int bcm7120_l2_intc_init_one(struct device_node *dn,
struct bcm7120_l2_intc_data *data,
- int irq, const __be32 *map_mask)
+ int irq)
{
int parent_irq;
unsigned int idx;
/* For multiple parent IRQs with multiple words, this looks like:
* <irq0_w0 irq0_w1 irq1_w0 irq1_w1 ...>
*/
- for (idx = 0; idx < data->n_words; idx++)
- data->irq_map_mask[idx] |=
- be32_to_cpup(map_mask + irq * data->n_words + idx);
+ for (idx = 0; idx < data->n_words; idx++) {
+ if (data->map_mask_prop) {
+ data->irq_map_mask[idx] |=
+ be32_to_cpup(data->map_mask_prop +
+ irq * data->n_words + idx);
+ } else {
+ data->irq_map_mask[idx] = 0xffffffff;
+ }
+ }
irq_set_handler_data(parent_irq, data);
irq_set_chained_handler(parent_irq, bcm7120_l2_intc_irq_handle);
return 0;
}
-int __init bcm7120_l2_intc_of_init(struct device_node *dn,
- struct device_node *parent)
+static int __init bcm7120_l2_intc_iomap_7120(struct device_node *dn,
+ struct bcm7120_l2_intc_data *data)
+{
+ int ret;
+
+ data->map_base[0] = of_iomap(dn, 0);
+ if (!data->map_base[0]) {
+ pr_err("unable to map registers\n");
+ return -ENOMEM;
+ }
+
+ data->pair_base[0] = data->map_base[0];
+ data->en_offset[0] = IRQEN;
+ data->stat_offset[0] = IRQSTAT;
+ data->n_words = 1;
+
+ ret = of_property_read_u32_array(dn, "brcm,int-fwd-mask",
+ data->irq_fwd_mask, data->n_words);
+ if (ret != 0 && ret != -EINVAL) {
+ /* property exists but has the wrong number of words */
+ pr_err("invalid brcm,int-fwd-mask property\n");
+ return -EINVAL;
+ }
+
+ data->map_mask_prop = of_get_property(dn, "brcm,int-map-mask", &ret);
+ if (!data->map_mask_prop ||
+ (ret != (sizeof(__be32) * data->num_parent_irqs * data->n_words))) {
+ pr_err("invalid brcm,int-map-mask property\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __init bcm7120_l2_intc_iomap_3380(struct device_node *dn,
+ struct bcm7120_l2_intc_data *data)
+{
+ unsigned int gc_idx;
+
+ for (gc_idx = 0; gc_idx < MAX_WORDS; gc_idx++) {
+ unsigned int map_idx = gc_idx * 2;
+ void __iomem *en = of_iomap(dn, map_idx + 0);
+ void __iomem *stat = of_iomap(dn, map_idx + 1);
+ void __iomem *base = min(en, stat);
+
+ data->map_base[map_idx + 0] = en;
+ data->map_base[map_idx + 1] = stat;
+
+ if (!base)
+ break;
+
+ data->pair_base[gc_idx] = base;
+ data->en_offset[gc_idx] = en - base;
+ data->stat_offset[gc_idx] = stat - base;
+ }
+
+ if (!gc_idx) {
+ pr_err("unable to map registers\n");
+ return -EINVAL;
+ }
+
+ data->n_words = gc_idx;
+ return 0;
+}
+
+int __init bcm7120_l2_intc_probe(struct device_node *dn,
+ struct device_node *parent,
+ int (*iomap_regs_fn)(struct device_node *,
+ struct bcm7120_l2_intc_data *),
+ const char *intc_name)
{
unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
struct bcm7120_l2_intc_data *data;
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
- const __be32 *map_mask;
- int num_parent_irqs;
- int ret = 0, len;
+ int ret = 0;
unsigned int idx, irq, flags;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
- for (idx = 0; idx < MAX_WORDS; idx++) {
- data->base[idx] = of_iomap(dn, idx);
- if (!data->base[idx])
- break;
- data->n_words = idx + 1;
- }
- if (!data->n_words) {
- pr_err("failed to remap intc L2 registers\n");
- ret = -ENOMEM;
- goto out_unmap;
- }
-
- /* Enable all interrupts specified in the interrupt forward mask;
- * disable all others. If the property doesn't exist (-EINVAL),
- * assume all zeroes.
- */
- ret = of_property_read_u32_array(dn, "brcm,int-fwd-mask",
- data->irq_fwd_mask, data->n_words);
- if (ret == 0 || ret == -EINVAL) {
- for (idx = 0; idx < data->n_words; idx++)
- __raw_writel(data->irq_fwd_mask[idx],
- data->base[idx] + IRQEN);
- } else {
- /* property exists but has the wrong number of words */
- pr_err("invalid int-fwd-mask property\n");
- ret = -EINVAL;
- goto out_unmap;
- }
-
- num_parent_irqs = of_irq_count(dn);
- if (num_parent_irqs <= 0) {
+ data->num_parent_irqs = of_irq_count(dn);
+ if (data->num_parent_irqs <= 0) {
pr_err("invalid number of parent interrupts\n");
ret = -ENOMEM;
goto out_unmap;
}
- map_mask = of_get_property(dn, "brcm,int-map-mask", &len);
- if (!map_mask ||
- (len != (sizeof(*map_mask) * num_parent_irqs * data->n_words))) {
- pr_err("invalid brcm,int-map-mask property\n");
- ret = -EINVAL;
+ ret = iomap_regs_fn(dn, data);
+ if (ret < 0)
goto out_unmap;
+
+ for (idx = 0; idx < data->n_words; idx++) {
+ __raw_writel(data->irq_fwd_mask[idx],
+ data->pair_base[idx] +
+ data->en_offset[idx]);
}
- for (irq = 0; irq < num_parent_irqs; irq++) {
- ret = bcm7120_l2_intc_init_one(dn, data, irq, map_mask);
+ for (irq = 0; irq < data->num_parent_irqs; irq++) {
+ ret = bcm7120_l2_intc_init_one(dn, data, irq);
if (ret)
goto out_unmap;
}
gc = irq_get_domain_generic_chip(data->domain, irq);
gc->unused = 0xffffffff & ~data->irq_map_mask[idx];
- gc->reg_base = data->base[idx];
gc->private = data;
ct = gc->chip_types;
- ct->regs.mask = IRQEN;
+ gc->reg_base = data->pair_base[idx];
+ ct->regs.mask = data->en_offset[idx];
+
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_ack = irq_gc_noop;
}
}
- pr_info("registered BCM7120 L2 intc (mem: 0x%p, parent IRQ(s): %d)\n",
- data->base[0], num_parent_irqs);
+ pr_info("registered %s intc (mem: 0x%p, parent IRQ(s): %d)\n",
+ intc_name, data->map_base[0], data->num_parent_irqs);
return 0;
out_free_domain:
irq_domain_remove(data->domain);
out_unmap:
- for (idx = 0; idx < MAX_WORDS; idx++) {
- if (data->base[idx])
- iounmap(data->base[idx]);
+ for (idx = 0; idx < MAX_MAPPINGS; idx++) {
+ if (data->map_base[idx])
+ iounmap(data->map_base[idx]);
}
kfree(data);
return ret;
}
+
+int __init bcm7120_l2_intc_probe_7120(struct device_node *dn,
+ struct device_node *parent)
+{
+ return bcm7120_l2_intc_probe(dn, parent, bcm7120_l2_intc_iomap_7120,
+ "BCM7120 L2");
+}
+
+int __init bcm7120_l2_intc_probe_3380(struct device_node *dn,
+ struct device_node *parent)
+{
+ return bcm7120_l2_intc_probe(dn, parent, bcm7120_l2_intc_iomap_3380,
+ "BCM3380 L2");
+}
+
IRQCHIP_DECLARE(bcm7120_l2_intc, "brcm,bcm7120-l2-intc",
- bcm7120_l2_intc_of_init);
+ bcm7120_l2_intc_probe_7120);
+
+IRQCHIP_DECLARE(bcm3380_l2_intc, "brcm,bcm3380-l2-intc",
+ bcm7120_l2_intc_probe_3380);
projects / firefly-linux-kernel-4.4.55.git / blobdiff