From: Oleksij Rempel <linux@rempel-privat.de>
To: linux-kernel@vger.kernel.org, marc.zyngier@arm.com,
jason@lakedaemon.net, tglx@linutronix.de
Cc: Oleksij Rempel <linux@rempel-privat.de>
Subject: [PATCH v6 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets
Date: Mon, 12 Oct 2015 21:15:31 +0200 [thread overview]
Message-ID: <1444677334-12242-3-git-send-email-linux@rempel-privat.de> (raw)
In-Reply-To: <1444677334-12242-1-git-send-email-linux@rempel-privat.de>
Some HW has similar functionality but different register offsets.
Make sure we can change offsets dynamically.
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
---
drivers/irqchip/irq-mxs.c | 78 +++++++++++++++++++++++++++++++++++++----------
1 file changed, 62 insertions(+), 16 deletions(-)
diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c
index 604df63..86dec9a 100644
--- a/drivers/irqchip/irq-mxs.c
+++ b/drivers/irqchip/irq-mxs.c
@@ -28,18 +28,36 @@
#include <linux/stmp_device.h>
#include <asm/exception.h>
+/*
+ * this device provide 4 offsets for each register:
+ * 0x0 - plain read write mode
+ * 0x4 - set mode, OR logic.
+ * 0x8 - clr mode, XOR logic.
+ * 0xc - togle mode.
+ */
+#define SET_REG 4
+#define CLR_REG 8
+
#define HW_ICOLL_VECTOR 0x0000
#define HW_ICOLL_LEVELACK 0x0010
#define HW_ICOLL_CTRL 0x0020
#define HW_ICOLL_STAT_OFFSET 0x0070
-#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10)
-#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10)
-#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004
+#define HW_ICOLL_INTERRUPT0 0x0120
+#define HW_ICOLL_INTERRUPTn(n) ((n) * 0x10)
+#define BM_ICOLL_INTR_ENABLE BIT(2)
#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1
#define ICOLL_NUM_IRQS 128
-static void __iomem *icoll_base;
+struct icoll_priv {
+ void __iomem *vector;
+ void __iomem *levelack;
+ void __iomem *ctrl;
+ void __iomem *stat;
+ void __iomem *intr;
+};
+
+static struct icoll_priv icoll_priv;
static struct irq_domain *icoll_domain;
static void icoll_ack_irq(struct irq_data *d)
@@ -50,19 +68,19 @@ static void icoll_ack_irq(struct irq_data *d)
* BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 unconditionally.
*/
__raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0,
- icoll_base + HW_ICOLL_LEVELACK);
+ icoll_priv.levelack);
}
static void icoll_mask_irq(struct irq_data *d)
{
- __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
- icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->hwirq));
+ __raw_writel(BM_ICOLL_INTR_ENABLE,
+ icoll_priv.intr + CLR_REG + HW_ICOLL_INTERRUPTn(d->hwirq));
}
static void icoll_unmask_irq(struct irq_data *d)
{
- __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
- icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq));
+ __raw_writel(BM_ICOLL_INTR_ENABLE,
+ icoll_priv.intr + SET_REG + HW_ICOLL_INTERRUPTn(d->hwirq));
}
static struct irq_chip mxs_icoll_chip = {
@@ -75,8 +93,8 @@ asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
{
u32 irqnr;
- irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET);
- __raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR);
+ irqnr = __raw_readl(icoll_priv.stat);
+ __raw_writel(irqnr, icoll_priv.vector);
handle_domain_irq(icoll_domain, irqnr, regs);
}
@@ -93,20 +111,48 @@ static const struct irq_domain_ops icoll_irq_domain_ops = {
.xlate = irq_domain_xlate_onecell,
};
+static void __init icoll_add_domain(struct device_node *np,
+ int num)
+{
+ icoll_domain = irq_domain_add_linear(np, num,
+ &icoll_irq_domain_ops, NULL);
+
+ if (!icoll_domain)
+ panic("%s: unable add irq domain", np->full_name);
+ irq_set_default_host(icoll_domain);
+ set_handle_irq(icoll_handle_irq);
+}
+
+static void __iomem * __init icoll_init_iobase(struct device_node *np)
+{
+ void __iomem *icoll_base;
+
+ icoll_base = of_io_request_and_map(np, 0, np->name);
+ if (!icoll_base)
+ panic("%s: unable to map resource", np->full_name);
+ return icoll_base;
+}
+
static int __init icoll_of_init(struct device_node *np,
struct device_node *interrupt_parent)
{
- icoll_base = of_iomap(np, 0);
- WARN_ON(!icoll_base);
+ void __iomem *icoll_base;
+
+ icoll_base = icoll_init_iobase(np);
+ icoll_priv.vector = icoll_base + HW_ICOLL_VECTOR;
+ icoll_priv.levelack = icoll_base + HW_ICOLL_LEVELACK;
+ icoll_priv.ctrl = icoll_base + HW_ICOLL_CTRL;
+ icoll_priv.stat = icoll_base + HW_ICOLL_STAT_OFFSET;
+ icoll_priv.intr = icoll_base + HW_ICOLL_INTERRUPT0;
/*
* Interrupt Collector reset, which initializes the priority
* for each irq to level 0.
*/
- stmp_reset_block(icoll_base + HW_ICOLL_CTRL);
+ stmp_reset_block(icoll_priv.ctrl);
+
+ icoll_add_domain(np, ICOLL_NUM_IRQS);
- icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS,
- &icoll_irq_domain_ops, NULL);
return icoll_domain ? 0 : -ENODEV;
}
IRQCHIP_DECLARE(mxs, "fsl,icoll", icoll_of_init);
--
2.1.4
next prev parent reply other threads:[~2015-10-12 19:15 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-18 9:18 [PATCH v2 0/2] changelog Oleksij Rempel
2015-09-18 9:18 ` [PATCH v2 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-18 10:21 ` Thomas Gleixner
2015-09-18 9:18 ` [PATCH v2 2/2] ARM: irqchip: mxs: add Alpascale ASM9260 support Oleksij Rempel
2015-09-18 10:42 ` Possible Spam " Marc Zyngier
2015-09-19 5:53 ` Oleksij Rempel
2015-09-20 11:28 ` Marc Zyngier
2015-09-20 13:47 ` Oleksij Rempel
2015-09-21 9:06 ` Thomas Gleixner
2015-09-21 11:53 ` [PATCH v3 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-09-21 11:53 ` [PATCH v3 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-21 11:53 ` [PATCH v3 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-09-22 10:34 ` Thomas Gleixner
2015-09-23 16:20 ` [PATCH v4 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-09-23 16:20 ` [PATCH v4 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-29 16:06 ` Thomas Gleixner
2015-10-05 19:00 ` [PATCH v5 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-05 19:00 ` [PATCH v5 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-05 19:00 ` [PATCH v5 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-09 14:11 ` Thomas Gleixner
2015-10-10 13:08 ` [PATCH v6 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-10 13:08 ` [PATCH v6 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-11 17:58 ` Thomas Gleixner
2015-10-12 9:29 ` Oleksij Rempel
2015-10-12 9:32 ` Thomas Gleixner
2015-10-12 19:15 ` [PATCH v7 0/3] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 1/3] ARM: irqchip: mxs: do panic if icoll_base == NULL Oleksij Rempel
2015-10-14 7:42 ` [tip:irq/core] irqchip/mxs: Panic if ioremap or domain creation fails tip-bot for Oleksij Rempel
2015-10-12 19:15 ` Oleksij Rempel [this message]
2015-10-12 19:15 ` [PATCH v6 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 2/3] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-14 7:42 ` [tip:irq/core] irqchip/mxs: Prepare driver for hardware " tip-bot for Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 3/3] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-14 7:43 ` [tip:irq/core] irqchip/mxs: Add " tip-bot for Oleksij Rempel
2015-10-10 13:08 ` [PATCH v6 2/2] ARM: irqchip: mxs: add " Oleksij Rempel
2015-09-23 16:20 ` [PATCH v4 " Oleksij Rempel
2015-09-18 9:48 ` [PATCH v2 2/2] ARM: irqchip: mxs: add Alpascale " Oleksij Rempel
2015-09-18 10:16 ` [PATCH v2 0/2] changelog Marc Zyngier
2015-09-18 10:19 ` Thomas Gleixner
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