linux-kernel - [PATCH v9 4/4] irqchip:implement the mbigen irq chip operation functions

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Message-ID: <1448248513-39760-5-git-send-email-majun258@huawei.com>
Date:	Mon, 23 Nov 2015 11:15:13 +0800
From:	MaJun <majun258@...wei.com>
To:	<Catalin.Marinas@....com>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <Will.Deacon@....com>,
	<mark.rutland@....com>, <marc.zyngier@....com>,
	<jason@...edaemon.net>, <tglx@...utronix.de>, <lizefan@...wei.com>,
	<huxinwei@...wei.com>, <dingtianhong@...wei.com>,
	<zhaojunhua@...ilicon.com>, <liguozhu@...ilicon.com>,
	<xuwei5@...ilicon.com>, <wei.chenwei@...ilicon.com>,
	<guohanjun@...wei.com>, <wuyun.wu@...wei.com>,
	<guodong.xu@...aro.org>, <haojian.zhuang@...aro.org>,
	<zhangfei.gao@...aro.org>, <usman.ahmad@...aro.org>,
	<klimov.linux@...il.com>, <gabriele.paoloni@...wei.com>,
	<majun258@...wei.com>
Subject: [PATCH v9 4/4] irqchip:implement the mbigen irq chip operation functions

From: Ma Jun <majun258@...wei.com>

Add the interrupt controller chip operation functions of mbigen chip.

Signed-off-by: Ma Jun <majun258@...wei.com>
---
 drivers/irqchip/irq-mbigen.c |   84 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 84 insertions(+), 0 deletions(-)

diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index 81ae61f..540ad05 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -47,6 +47,20 @@
 #define REG_MBIGEN_VEC_OFFSET		0x200
 
 /**
+ * offset of clear register in mbigen node
+ * This register is used to clear the status
+ * of interrupt
+ */
+#define REG_MBIGEN_CLEAR_OFFSET		0xa000
+
+/**
+ * offset of interrupt type register
+ * This register is used to configure interrupt
+ * trigger type
+ */
+#define REG_MBIGEN_TYPE_OFFSET		0x0
+
+/**
  * struct mbigen_device - holds the information of mbigen device.
  *
  * @pdev:		pointer to the platform device structure of mbigen chip.
@@ -69,8 +83,78 @@ static inline unsigned int get_mbigen_vec_reg(irq_hw_number_t hwirq)
 			+ REG_MBIGEN_VEC_OFFSET;
 }
 
+static inline void get_mbigen_type_reg(irq_hw_number_t hwirq,
+					unsigned int *mask,
+					unsigned int *addr)
+{
+	unsigned int nid, pin, ofst;
+
+	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
+	nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
+	pin = hwirq % IRQS_PER_MBIGEN_NODE;
+
+	*mask = 1 << (pin % 32);
+	
+	ofst = pin / 32 * 4;
+	*addr = ofst + nid * MBIGEN_NODE_OFFSET
+		+ REG_MBIGEN_TYPE_OFFSET;
+}
+
+static inline void get_mbigen_clear_reg(irq_hw_number_t hwirq,
+					unsigned int *mask,
+					unsigned int *addr)
+{
+	unsigned int ofst;
+
+	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
+	ofst = hwirq / 32 * 4;
+
+	*mask = 1 << (hwirq % 32);
+	*addr = ofst + REG_MBIGEN_CLEAR_OFFSET;
+}
+
+static void mbigen_eoi_irq(struct irq_data *data)
+{
+	void __iomem *base = data->chip_data;
+	unsigned int mask, addr;
+
+	get_mbigen_clear_reg(data->hwirq, &mask, &addr);
+
+	writel_relaxed(mask, base + addr);
+
+	irq_chip_eoi_parent(data);
+}
+
+static int mbigen_set_type(struct irq_data *data, unsigned int type)
+{
+	void __iomem *base = data->chip_data;
+	unsigned int mask, addr;
+	u32 val;
+
+	if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
+		return -EINVAL;
+
+	get_mbigen_type_reg(data->hwirq, &mask, &addr);
+
+	val = readl_relaxed(base + addr);
+
+	if (type == IRQ_TYPE_LEVEL_HIGH)
+		val |= mask;
+	else
+		val &= ~mask;
+
+	writel_relaxed(val, base + addr);
+
+	return 0;
+}
+
 static struct irq_chip mbigen_irq_chip = {
 	.name =			"mbigen-v2",
+	.irq_mask =		irq_chip_mask_parent,
+	.irq_unmask =		irq_chip_unmask_parent,
+	.irq_eoi =		mbigen_eoi_irq,
+	.irq_set_type =		mbigen_set_type,
+	.irq_set_affinity =	irq_chip_set_affinity_parent,
 };
 
 static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg)
-- 
1.7.1


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