mirror of https://github.com/hak5/openwrt-owl.git
100 lines
2.8 KiB
Diff
100 lines
2.8 KiB
Diff
From 78b53021ae0715792fb6a89bd9e7c02fc254be5c Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
|
|
Date: Fri, 23 Oct 2015 16:26:55 +0200
|
|
Subject: [PATCH] irqchip: irq-bcm2835: Add 2836 FIQ support
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
|
|
---
|
|
drivers/irqchip/irq-bcm2835.c | 43 +++++++++++++++++++++++++++++++++++++++++--
|
|
1 file changed, 41 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/irqchip/irq-bcm2835.c
|
|
+++ b/drivers/irqchip/irq-bcm2835.c
|
|
@@ -50,8 +50,11 @@
|
|
#include <linux/of_irq.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/irqdomain.h>
|
|
+#include <linux/mfd/syscon.h>
|
|
+#include <linux/regmap.h>
|
|
|
|
#include <asm/exception.h>
|
|
+#include <asm/mach/irq.h>
|
|
|
|
/* Put the bank and irq (32 bits) into the hwirq */
|
|
#define MAKE_HWIRQ(b, n) (((b) << 5) | (n))
|
|
@@ -69,6 +72,9 @@
|
|
#define BANK0_VALID_MASK (BANK0_HWIRQ_MASK | BANK1_HWIRQ | BANK2_HWIRQ \
|
|
| SHORTCUT1_MASK | SHORTCUT2_MASK)
|
|
|
|
+#undef ARM_LOCAL_GPU_INT_ROUTING
|
|
+#define ARM_LOCAL_GPU_INT_ROUTING 0x0c
|
|
+
|
|
#define REG_FIQ_CONTROL 0x0c
|
|
#define REG_FIQ_ENABLE 0x80
|
|
#define REG_FIQ_DISABLE 0
|
|
@@ -94,6 +100,7 @@ struct armctrl_ic {
|
|
void __iomem *enable[NR_BANKS];
|
|
void __iomem *disable[NR_BANKS];
|
|
struct irq_domain *domain;
|
|
+ struct regmap *local_regmap;
|
|
};
|
|
|
|
static struct armctrl_ic intc __read_mostly;
|
|
@@ -127,12 +134,35 @@ static void armctrl_mask_irq(struct irq_
|
|
|
|
static void armctrl_unmask_irq(struct irq_data *d)
|
|
{
|
|
- if (d->hwirq >= NUMBER_IRQS)
|
|
+ if (d->hwirq >= NUMBER_IRQS) {
|
|
+ if (num_online_cpus() > 1) {
|
|
+ unsigned int data;
|
|
+ int ret;
|
|
+
|
|
+ if (!intc.local_regmap) {
|
|
+ pr_err("FIQ is disabled due to missing regmap\n");
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ ret = regmap_read(intc.local_regmap,
|
|
+ ARM_LOCAL_GPU_INT_ROUTING, &data);
|
|
+ if (ret) {
|
|
+ pr_err("Failed to read int routing %d\n", ret);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ data &= ~0xc;
|
|
+ data |= (1 << 2);
|
|
+ regmap_write(intc.local_regmap,
|
|
+ ARM_LOCAL_GPU_INT_ROUTING, data);
|
|
+ }
|
|
+
|
|
writel_relaxed(REG_FIQ_ENABLE | hwirq_to_fiq(d->hwirq),
|
|
intc.base + REG_FIQ_CONTROL);
|
|
- else
|
|
+ } else {
|
|
writel_relaxed(HWIRQ_BIT(d->hwirq),
|
|
intc.enable[HWIRQ_BANK(d->hwirq)]);
|
|
+ }
|
|
}
|
|
|
|
static struct irq_chip armctrl_chip = {
|
|
@@ -210,6 +240,15 @@ static int __init armctrl_of_init(struct
|
|
set_handle_irq(bcm2835_handle_irq);
|
|
}
|
|
|
|
+ if (is_2836) {
|
|
+ intc.local_regmap =
|
|
+ syscon_regmap_lookup_by_compatible("brcm,bcm2836-arm-local");
|
|
+ if (IS_ERR(intc.local_regmap)) {
|
|
+ pr_err("Failed to get local register map. FIQ is disabled for cpus > 1\n");
|
|
+ intc.local_regmap = NULL;
|
|
+ }
|
|
+ }
|
|
+
|
|
/* Make a duplicate irq range which is used to enable FIQ */
|
|
for (b = 0; b < NR_BANKS; b++) {
|
|
for (i = 0; i < bank_irqs[b]; i++) {
|