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Message-Id: <08b40429e46626f4caf8e4d2287b5c4d354e3b7f.1542824904.git.mesihkilinc@gmail.com>
Date: Wed, 21 Nov 2018 21:30:38 +0300
From: Mesih Kilinc <mesihkilinc@...il.com>
To: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-sunxi@...glegroups.com
Cc: Mesih Kilinc <mesihkilinc@...il.com>,
Maxime Ripard <maxime.ripard@...e-electrons.com>,
Chen-Yu Tsai <wens@...e.org>,
Russell King <linux@...linux.org.uk>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Marc Zyngier <marc.zyngier@....com>,
Linus Walleij <linus.walleij@...aro.org>,
Icenowy Zheng <icenowy@...c.io>,
Rob Herring <robh+dt@...nel.org>,
Julian Calaby <julian.calaby@...il.com>
Subject: [RFC PATCH v3 05/17] irqchip/sun4i: add support for suniv interrupt controller
The new F-series SoCs (suniv) from Allwinner use an stripped version of
the interrupt controller in A10/A13
Add support for it in irq-sun4i driver.
Signed-off-by: Mesih Kilinc <mesihkilinc@...il.com>
---
drivers/irqchip/irq-sun4i.c | 104 +++++++++++++++++++++++++++++++-------------
1 file changed, 74 insertions(+), 30 deletions(-)
diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c
index e3e5b91..7ca4a4d 100644
--- a/drivers/irqchip/irq-sun4i.c
+++ b/drivers/irqchip/irq-sun4i.c
@@ -28,11 +28,21 @@
#define SUN4I_IRQ_NMI_CTRL_REG 0x0c
#define SUN4I_IRQ_PENDING_REG(x) (0x10 + 0x4 * x)
#define SUN4I_IRQ_FIQ_PENDING_REG(x) (0x20 + 0x4 * x)
-#define SUN4I_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x)
-#define SUN4I_IRQ_MASK_REG(x) (0x50 + 0x4 * x)
+#define SUN4I_IRQ_ENABLE_REG(x) (irq_ic_data->enable_req_offset + 0x4 * x)
+#define SUN4I_IRQ_MASK_REG(x) (irq_ic_data->mask_req_offset + 0x4 * x)
+#define SUN4I_IRQ_ENABLE_REG_OFFSET 0x40
+#define SUN4I_IRQ_MASK_REG_OFFSET 0x50
+#define SUNIV_IRQ_ENABLE_REG_OFFSET 0x20
+#define SUNIV_IRQ_MASK_REG_OFFSET 0x30
+
+struct sunxi_irq_chip_data{
+ void __iomem *irq_base;
+ struct irq_domain *irq_domain;
+ u32 enable_req_offset;
+ u32 mask_req_offset;
+};
-static void __iomem *sun4i_irq_base;
-static struct irq_domain *sun4i_irq_domain;
+static struct sunxi_irq_chip_data *irq_ic_data;
static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
@@ -43,7 +53,7 @@ static void sun4i_irq_ack(struct irq_data *irqd)
if (irq != 0)
return; /* Only IRQ 0 / the ENMI needs to be acked */
- writel(BIT(0), sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0));
+ writel(BIT(0), irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0));
}
static void sun4i_irq_mask(struct irq_data *irqd)
@@ -53,9 +63,9 @@ static void sun4i_irq_mask(struct irq_data *irqd)
int reg = irq / 32;
u32 val;
- val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
+ val = readl(irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
writel(val & ~(1 << irq_off),
- sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
+ irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
}
static void sun4i_irq_unmask(struct irq_data *irqd)
@@ -65,9 +75,9 @@ static void sun4i_irq_unmask(struct irq_data *irqd)
int reg = irq / 32;
u32 val;
- val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
+ val = readl(irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
writel(val | (1 << irq_off),
- sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
+ irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
}
static struct irq_chip sun4i_irq_chip = {
@@ -95,42 +105,76 @@ static const struct irq_domain_ops sun4i_irq_ops = {
static int __init sun4i_of_init(struct device_node *node,
struct device_node *parent)
{
- sun4i_irq_base = of_iomap(node, 0);
- if (!sun4i_irq_base)
+ irq_ic_data->irq_base = of_iomap(node, 0);
+ if (!irq_ic_data->irq_base)
panic("%pOF: unable to map IC registers\n",
node);
/* Disable all interrupts */
- writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(0));
- writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(1));
- writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(2));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(0));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(1));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(2));
/* Unmask all the interrupts, ENABLE_REG(x) is used for masking */
- writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(0));
- writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(1));
- writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(2));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(0));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(1));
+ writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(2));
/* Clear all the pending interrupts */
- writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0));
- writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(1));
- writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(2));
+ writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0));
+ writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(1));
+ writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(2));
- /* Enable protection mode */
- writel(0x01, sun4i_irq_base + SUN4I_IRQ_PROTECTION_REG);
+ /* Enable protection mode (not available in suniv) */
+ if (of_device_is_compatible(node, "allwinner,sun4i-a10-ic"))
+ writel(0x01, irq_ic_data->irq_base + SUN4I_IRQ_PROTECTION_REG);
/* Configure the external interrupt source type */
- writel(0x00, sun4i_irq_base + SUN4I_IRQ_NMI_CTRL_REG);
+ writel(0x00, irq_ic_data->irq_base + SUN4I_IRQ_NMI_CTRL_REG);
- sun4i_irq_domain = irq_domain_add_linear(node, 3 * 32,
+ irq_ic_data->irq_domain = irq_domain_add_linear(node, 3 * 32,
&sun4i_irq_ops, NULL);
- if (!sun4i_irq_domain)
+ if (!irq_ic_data->irq_domain)
panic("%pOF: unable to create IRQ domain\n", node);
set_handle_irq(sun4i_handle_irq);
return 0;
}
-IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-a10-ic", sun4i_of_init);
+
+static int __init sun4i_ic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ irq_ic_data = kzalloc(sizeof(struct sunxi_irq_chip_data), GFP_KERNEL);
+ if (!irq_ic_data) {
+ pr_err("kzalloc failed!\n");
+ return -ENOMEM;
+ }
+
+ irq_ic_data->enable_req_offset = SUN4I_IRQ_ENABLE_REG_OFFSET;
+ irq_ic_data->mask_req_offset = SUN4I_IRQ_MASK_REG_OFFSET;
+
+ return sun4i_of_init(node, parent);
+}
+
+IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-a10-ic", sun4i_ic_of_init);
+
+static int __init suniv_ic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ irq_ic_data = kzalloc(sizeof(struct sunxi_irq_chip_data), GFP_KERNEL);
+ if (!irq_ic_data) {
+ pr_err("kzalloc failed!\n");
+ return -ENOMEM;
+ }
+
+ irq_ic_data->enable_req_offset = SUNIV_IRQ_ENABLE_REG_OFFSET;
+ irq_ic_data->mask_req_offset = SUNIV_IRQ_MASK_REG_OFFSET;
+
+ return sun4i_of_init(node, parent);
+}
+
+IRQCHIP_DECLARE(allwinner_sunvi_ic, "allwinner,suniv-f1c100s-ic", suniv_ic_of_init);
static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
{
@@ -146,13 +190,13 @@ static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
* the extra check in the common case of 1 hapening after having
* read the vector-reg once.
*/
- hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
+ hwirq = readl(irq_ic_data->irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
if (hwirq == 0 &&
- !(readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0)) & BIT(0)))
+ !(readl(irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0)) & BIT(0)))
return;
do {
- handle_domain_irq(sun4i_irq_domain, hwirq, regs);
- hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
+ handle_domain_irq(irq_ic_data->irq_domain, hwirq, regs);
+ hwirq = readl(irq_ic_data->irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
} while (hwirq != 0);
}
--
2.7.4
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