sunxi: initial 3.14 patchset

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

SVN-Revision: 42313

1 files changed, 247 insertions, 0 deletions

diff --git a/target/linux/sunxi/patches-3.14/205-nmi-add-driver.patch b/target/linux/sunxi/patches-3.14/205-nmi-add-driver.patch
new file mode 100644
index 0000000..2e23f94
--- /dev/null
+++ b/target/linux/sunxi/patches-3.14/205-nmi-add-driver.patch
@@ -0,0 +1,247 @@
+From b9ad0253e6c68ac3d37fd2ed8ed9bf8a334e4b65 Mon Sep 17 00:00:00 2001
+From: Carlo Caione <carlo@caione.org>
+Date: Sat, 15 Mar 2014 14:40:59 +0100
+Subject: [PATCH] ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI
+ controller
+
+Allwinner A20/A31 SoCs have special registers to control / (un)mask /
+acknowledge NMI. This NMI controller is separated and independent from GIC.
+This patch adds a new irqchip to manage NMI.
+
+Signed-off-by: Carlo Caione <carlo@caione.org>
+Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
+---
+ drivers/irqchip/Makefile        |   1 +
+ drivers/irqchip/irq-sunxi-nmi.c | 208 ++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 209 insertions(+)
+ create mode 100644 drivers/irqchip/irq-sunxi-nmi.c
+
+diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
+index 5194afb..1c0c151 100644
+--- a/drivers/irqchip/Makefile
++++ b/drivers/irqchip/Makefile
+@@ -12,6 +12,7 @@ obj-$(CONFIG_METAG_PERFCOUNTER_IRQS)	+= irq-metag.o
+ obj-$(CONFIG_ARCH_MOXART)		+= irq-moxart.o
+ obj-$(CONFIG_ORION_IRQCHIP)		+= irq-orion.o
+ obj-$(CONFIG_ARCH_SUNXI)		+= irq-sun4i.o
++obj-$(CONFIG_ARCH_SUNXI)		+= irq-sunxi-nmi.o
+ obj-$(CONFIG_ARCH_SPEAR3XX)		+= spear-shirq.o
+ obj-$(CONFIG_ARM_GIC)			+= irq-gic.o
+ obj-$(CONFIG_ARM_NVIC)			+= irq-nvic.o
+diff --git a/drivers/irqchip/irq-sunxi-nmi.c b/drivers/irqchip/irq-sunxi-nmi.c
+new file mode 100644
+index 0000000..12f547a
+--- /dev/null
++++ b/drivers/irqchip/irq-sunxi-nmi.c
+@@ -0,0 +1,208 @@
++/*
++ * Allwinner A20/A31 SoCs NMI IRQ chip driver.
++ *
++ * Carlo Caione <carlo.caione@gmail.com>
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2.  This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++#include <linux/bitops.h>
++#include <linux/device.h>
++#include <linux/io.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/irqdomain.h>
++#include <linux/of_irq.h>
++#include <linux/of_address.h>
++#include <linux/of_platform.h>
++#include <linux/irqchip/chained_irq.h>
++#include "irqchip.h"
++
++#define SUNXI_NMI_SRC_TYPE_MASK	0x00000003
++
++enum {
++	SUNXI_SRC_TYPE_LEVEL_LOW = 0,
++	SUNXI_SRC_TYPE_EDGE_FALLING,
++	SUNXI_SRC_TYPE_LEVEL_HIGH,
++	SUNXI_SRC_TYPE_EDGE_RISING,
++};
++
++struct sunxi_sc_nmi_reg_offs {
++	u32 ctrl;
++	u32 pend;
++	u32 enable;
++};
++
++static struct sunxi_sc_nmi_reg_offs sun7i_reg_offs = {
++	.ctrl	= 0x00,
++	.pend	= 0x04,
++	.enable	= 0x08,
++};
++
++static struct sunxi_sc_nmi_reg_offs sun6i_reg_offs = {
++	.ctrl	= 0x00,
++	.pend	= 0x04,
++	.enable	= 0x34,
++};
++
++static inline void sunxi_sc_nmi_write(struct irq_chip_generic *gc, u32 off,
++				      u32 val)
++{
++	irq_reg_writel(val, gc->reg_base + off);
++}
++
++static inline u32 sunxi_sc_nmi_read(struct irq_chip_generic *gc, u32 off)
++{
++	return irq_reg_readl(gc->reg_base + off);
++}
++
++static void sunxi_sc_nmi_handle_irq(unsigned int irq, struct irq_desc *desc)
++{
++	struct irq_domain *domain = irq_desc_get_handler_data(desc);
++	struct irq_chip *chip = irq_get_chip(irq);
++	unsigned int virq = irq_find_mapping(domain, 0);
++
++	chained_irq_enter(chip, desc);
++	generic_handle_irq(virq);
++	chained_irq_exit(chip, desc);
++}
++
++static int sunxi_sc_nmi_set_type(struct irq_data *data, unsigned int flow_type)
++{
++	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
++	struct irq_chip_type *ct = gc->chip_types;
++	u32 src_type_reg;
++	u32 ctrl_off = ct->regs.type;
++	unsigned int src_type;
++	unsigned int i;
++
++	irq_gc_lock(gc);
++
++	switch (flow_type & IRQF_TRIGGER_MASK) {
++	case IRQ_TYPE_EDGE_FALLING:
++		src_type = SUNXI_SRC_TYPE_EDGE_FALLING;
++		break;
++	case IRQ_TYPE_EDGE_RISING:
++		src_type = SUNXI_SRC_TYPE_EDGE_RISING;
++		break;
++	case IRQ_TYPE_LEVEL_HIGH:
++		src_type = SUNXI_SRC_TYPE_LEVEL_HIGH;
++		break;
++	case IRQ_TYPE_NONE:
++	case IRQ_TYPE_LEVEL_LOW:
++		src_type = SUNXI_SRC_TYPE_LEVEL_LOW;
++		break;
++	default:
++		irq_gc_unlock(gc);
++		pr_err("%s: Cannot assign multiple trigger modes to IRQ %d.\n",
++			__func__, data->irq);
++		return -EBADR;
++	}
++
++	irqd_set_trigger_type(data, flow_type);
++	irq_setup_alt_chip(data, flow_type);
++
++	for (i = 0; i <= gc->num_ct; i++, ct++)
++		if (ct->type & flow_type)
++			ctrl_off = ct->regs.type;
++
++	src_type_reg = sunxi_sc_nmi_read(gc, ctrl_off);
++	src_type_reg &= ~SUNXI_NMI_SRC_TYPE_MASK;
++	src_type_reg |= src_type;
++	sunxi_sc_nmi_write(gc, ctrl_off, src_type_reg);
++
++	irq_gc_unlock(gc);
++
++	return IRQ_SET_MASK_OK;
++}
++
++static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
++					struct sunxi_sc_nmi_reg_offs *reg_offs)
++{
++	struct irq_domain *domain;
++	struct irq_chip_generic *gc;
++	unsigned int irq;
++	unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
++	int ret;
++
++
++	domain = irq_domain_add_linear(node, 1, &irq_generic_chip_ops, NULL);
++	if (!domain) {
++		pr_err("%s: Could not register interrupt domain.\n", node->name);
++		return -ENOMEM;
++	}
++
++	ret = irq_alloc_domain_generic_chips(domain, 1, 2, node->name,
++					     handle_fasteoi_irq, clr, 0,
++					     IRQ_GC_INIT_MASK_CACHE);
++	if (ret) {
++		 pr_err("%s: Could not allocate generic interrupt chip.\n",
++			 node->name);
++		 goto fail_irqd_remove;
++	}
++
++	irq = irq_of_parse_and_map(node, 0);
++	if (irq <= 0) {
++		pr_err("%s: unable to parse irq\n", node->name);
++		ret = -EINVAL;
++		goto fail_irqd_remove;
++	}
++
++	gc = irq_get_domain_generic_chip(domain, 0);
++	gc->reg_base = of_iomap(node, 0);
++	if (!gc->reg_base) {
++		pr_err("%s: unable to map resource\n", node->name);
++		ret = -ENOMEM;
++		goto fail_irqd_remove;
++	}
++
++	gc->chip_types[0].type			= IRQ_TYPE_LEVEL_MASK;
++	gc->chip_types[0].chip.irq_mask		= irq_gc_mask_clr_bit;
++	gc->chip_types[0].chip.irq_unmask	= irq_gc_mask_set_bit;
++	gc->chip_types[0].chip.irq_eoi		= irq_gc_ack_set_bit;
++	gc->chip_types[0].chip.irq_set_type	= sunxi_sc_nmi_set_type;
++	gc->chip_types[0].chip.flags		= IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED;
++	gc->chip_types[0].regs.ack		= reg_offs->pend;
++	gc->chip_types[0].regs.mask		= reg_offs->enable;
++	gc->chip_types[0].regs.type		= reg_offs->ctrl;
++
++	gc->chip_types[1].type			= IRQ_TYPE_EDGE_BOTH;
++	gc->chip_types[1].chip.name		= gc->chip_types[0].chip.name;
++	gc->chip_types[1].chip.irq_ack		= irq_gc_ack_set_bit;
++	gc->chip_types[1].chip.irq_mask		= irq_gc_mask_clr_bit;
++	gc->chip_types[1].chip.irq_unmask	= irq_gc_mask_set_bit;
++	gc->chip_types[1].chip.irq_set_type	= sunxi_sc_nmi_set_type;
++	gc->chip_types[1].regs.ack		= reg_offs->pend;
++	gc->chip_types[1].regs.mask		= reg_offs->enable;
++	gc->chip_types[1].regs.type		= reg_offs->ctrl;
++	gc->chip_types[1].handler		= handle_edge_irq;
++
++	sunxi_sc_nmi_write(gc, reg_offs->enable, 0);
++	sunxi_sc_nmi_write(gc, reg_offs->pend, 0x1);
++
++	irq_set_handler_data(irq, domain);
++	irq_set_chained_handler(irq, sunxi_sc_nmi_handle_irq);
++
++	return 0;
++
++fail_irqd_remove:
++	irq_domain_remove(domain);
++
++	return ret;
++}
++
++static int __init sun6i_sc_nmi_irq_init(struct device_node *node,
++					struct device_node *parent)
++{
++	return sunxi_sc_nmi_irq_init(node, &sun6i_reg_offs);
++}
++IRQCHIP_DECLARE(sun6i_sc_nmi, "allwinner,sun6i-a31-sc-nmi", sun6i_sc_nmi_irq_init);
++
++static int __init sun7i_sc_nmi_irq_init(struct device_node *node,
++					struct device_node *parent)
++{
++	return sunxi_sc_nmi_irq_init(node, &sun7i_reg_offs);
++}
++IRQCHIP_DECLARE(sun7i_sc_nmi, "allwinner,sun7i-a20-sc-nmi", sun7i_sc_nmi_irq_init);
+-- 
+2.0.3
+