[lantiq] add linux-v3.7

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34687 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 214 insertions, 0 deletions

diff --git a/target/linux/lantiq/patches-3.7/0105-MIPS-lantiq-rework-external-irq-code.patch b/target/linux/lantiq/patches-3.7/0105-MIPS-lantiq-rework-external-irq-code.patch
new file mode 100644
index 000000000..88659c244
--- /dev/null
+++ b/target/linux/lantiq/patches-3.7/0105-MIPS-lantiq-rework-external-irq-code.patch
@@ -0,0 +1,214 @@
+From edd237c93d564e698e169a89d1b1b35248c5ef4a Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 3 Dec 2012 21:44:30 +0100
+Subject: [PATCH 105/123] MIPS: lantiq: rework external irq code
+
+This code makes the irqs used by the EIU loadable from the DT. Additionally we
+add a helper that allows the pinctrl layer to map external irqs to real irq
+numbers.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/include/asm/mach-lantiq/lantiq.h |    1 +
+ arch/mips/lantiq/irq.c                     |  104 +++++++++++++++++++---------
+ 2 files changed, 73 insertions(+), 32 deletions(-)
+
+diff --git a/arch/mips/include/asm/mach-lantiq/lantiq.h b/arch/mips/include/asm/mach-lantiq/lantiq.h
+index 76be7a0..f196cce 100644
+--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
++++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
+@@ -34,6 +34,7 @@ extern spinlock_t ebu_lock;
+ extern void ltq_disable_irq(struct irq_data *data);
+ extern void ltq_mask_and_ack_irq(struct irq_data *data);
+ extern void ltq_enable_irq(struct irq_data *data);
++extern int ltq_eiu_get_irq(int exin);
+ 
+ /* clock handling */
+ extern int clk_activate(struct clk *clk);
+diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
+index f36acd1..48407f6 100644
+--- a/arch/mips/lantiq/irq.c
++++ b/arch/mips/lantiq/irq.c
+@@ -33,17 +33,10 @@
+ /* register definitions - external irqs */
+ #define LTQ_EIU_EXIN_C		0x0000
+ #define LTQ_EIU_EXIN_INIC	0x0004
++#define LTQ_EIU_EXIN_INC	0x0008
+ #define LTQ_EIU_EXIN_INEN	0x000C
+ 
+-/* irq numbers used by the external interrupt unit (EIU) */
+-#define LTQ_EIU_IR0		(INT_NUM_IM4_IRL0 + 30)
+-#define LTQ_EIU_IR1		(INT_NUM_IM3_IRL0 + 31)
+-#define LTQ_EIU_IR2		(INT_NUM_IM1_IRL0 + 26)
+-#define LTQ_EIU_IR3		INT_NUM_IM1_IRL0
+-#define LTQ_EIU_IR4		(INT_NUM_IM1_IRL0 + 1)
+-#define LTQ_EIU_IR5		(INT_NUM_IM1_IRL0 + 2)
+-#define LTQ_EIU_IR6		(INT_NUM_IM2_IRL0 + 30)
+-#define XWAY_EXIN_COUNT		3
++/* number of external interrupts */
+ #define MAX_EIU			6
+ 
+ /* the performance counter */
+@@ -72,20 +65,19 @@
+ int gic_present;
+ #endif
+ 
+-static unsigned short ltq_eiu_irq[MAX_EIU] = {
+-	LTQ_EIU_IR0,
+-	LTQ_EIU_IR1,
+-	LTQ_EIU_IR2,
+-	LTQ_EIU_IR3,
+-	LTQ_EIU_IR4,
+-	LTQ_EIU_IR5,
+-};
+-
+ static int exin_avail;
++static struct resource ltq_eiu_irq[MAX_EIU];
+ static void __iomem *ltq_icu_membase[MAX_IM];
+ static void __iomem *ltq_eiu_membase;
+ static struct irq_domain *ltq_domain;
+ 
++int ltq_eiu_get_irq(int exin)
++{
++	if (exin < exin_avail)
++		return ltq_eiu_irq[exin].start;
++	return -1;
++}
++
+ void ltq_disable_irq(struct irq_data *d)
+ {
+ 	u32 ier = LTQ_ICU_IM0_IER;
+@@ -128,19 +120,64 @@ void ltq_enable_irq(struct irq_data *d)
+ 	ltq_icu_w32(im, ltq_icu_r32(im, ier) | BIT(offset), ier);
+ }
+ 
++static int ltq_eiu_settype(struct irq_data *d, unsigned int type)
++{
++	int i;
++
++	for (i = 0; i < MAX_EIU; i++) {
++		if (d->hwirq == ltq_eiu_irq[i].start) {
++			int val = 0;
++			int edge = 0;
++
++			switch (type) {
++			case IRQF_TRIGGER_NONE:
++				break;
++			case IRQF_TRIGGER_RISING:
++				val = 1;
++				edge = 1;
++				break;
++			case IRQF_TRIGGER_FALLING:
++				val = 2;
++				edge = 1;
++				break;
++			case IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING:
++				val = 3;
++				edge = 1;
++				break;
++			case IRQF_TRIGGER_HIGH:
++				val = 5;
++				break;
++			case IRQF_TRIGGER_LOW:
++				val = 6;
++				break;
++			default:
++				pr_err("invalid type %d for irq %ld\n", type, d->hwirq);
++				return -EINVAL;
++			}
++
++			if (edge)
++				irq_set_handler(d->hwirq, handle_edge_irq);
++
++			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_C) |
++				(val << (i * 4)), LTQ_EIU_EXIN_C);
++		}
++	}
++
++	return 0;
++}
++
+ static unsigned int ltq_startup_eiu_irq(struct irq_data *d)
+ {
+ 	int i;
+ 
+ 	ltq_enable_irq(d);
+ 	for (i = 0; i < MAX_EIU; i++) {
+-		if (d->hwirq == ltq_eiu_irq[i]) {
+-			/* low level - we should really handle set_type */
+-			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_C) |
+-				(0x6 << (i * 4)), LTQ_EIU_EXIN_C);
++		if (d->hwirq == ltq_eiu_irq[i].start) {
++			/* by default we are low level triggered */
++			ltq_eiu_settype(d, IRQF_TRIGGER_LOW);
+ 			/* clear all pending */
+-			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INIC) & ~BIT(i),
+-				LTQ_EIU_EXIN_INIC);
++			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INC) & ~BIT(i),
++				LTQ_EIU_EXIN_INC);
+ 			/* enable */
+ 			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) | BIT(i),
+ 				LTQ_EIU_EXIN_INEN);
+@@ -157,7 +194,7 @@ static void ltq_shutdown_eiu_irq(struct irq_data *d)
+ 
+ 	ltq_disable_irq(d);
+ 	for (i = 0; i < MAX_EIU; i++) {
+-		if (d->hwirq == ltq_eiu_irq[i]) {
++		if (d->hwirq == ltq_eiu_irq[i].start) {
+ 			/* disable */
+ 			ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) & ~BIT(i),
+ 				LTQ_EIU_EXIN_INEN);
+@@ -186,6 +223,7 @@ static struct irq_chip ltq_eiu_type = {
+ 	.irq_ack = ltq_ack_irq,
+ 	.irq_mask = ltq_disable_irq,
+ 	.irq_mask_ack = ltq_mask_and_ack_irq,
++	.irq_set_type = ltq_eiu_settype,
+ };
+ 
+ static void ltq_hw_irqdispatch(int module)
+@@ -301,7 +339,7 @@ static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+ 		return 0;
+ 
+ 	for (i = 0; i < exin_avail; i++)
+-		if (hw == ltq_eiu_irq[i])
++		if (hw == ltq_eiu_irq[i].start)
+ 			chip = &ltq_eiu_type;
+ 
+ 	irq_set_chip_and_handler(hw, chip, handle_level_irq);
+@@ -323,7 +361,7 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
+ {
+ 	struct device_node *eiu_node;
+ 	struct resource res;
+-	int i;
++	int i, ret;
+ 
+ 	for (i = 0; i < MAX_IM; i++) {
+ 		if (of_address_to_resource(node, i, &res))
+@@ -340,17 +378,19 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
+ 	}
+ 
+ 	/* the external interrupts are optional and xway only */
+-	eiu_node = of_find_compatible_node(NULL, NULL, "lantiq,eiu");
++	eiu_node = of_find_compatible_node(NULL, NULL, "lantiq,eiu-xway");
+ 	if (eiu_node && !of_address_to_resource(eiu_node, 0, &res)) {
+ 		/* find out how many external irq sources we have */
+-		const __be32 *count = of_get_property(node,
+-							"lantiq,count",	NULL);
++		exin_avail = of_irq_count(eiu_node);
+ 
+-		if (count)
+-			exin_avail = *count;
+ 		if (exin_avail > MAX_EIU)
+ 			exin_avail = MAX_EIU;
+ 
++		ret = of_irq_to_resource_table(eiu_node,
++						ltq_eiu_irq, exin_avail);
++		if (ret != exin_avail)
++			panic("failed to load external irq resources\n");
++
+ 		if (request_mem_region(res.start, resource_size(&res),
+ 							res.name) < 0)
+ 			pr_err("Failed to request eiu memory");
+-- 
+1.7.10.4
+