diff options
Diffstat (limited to 'target/linux/bcm63xx/patches-5.10/321-irqchip-add-support-for-bcm6345-style-external-inter.patch')
-rw-r--r-- | target/linux/bcm63xx/patches-5.10/321-irqchip-add-support-for-bcm6345-style-external-inter.patch | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/target/linux/bcm63xx/patches-5.10/321-irqchip-add-support-for-bcm6345-style-external-inter.patch b/target/linux/bcm63xx/patches-5.10/321-irqchip-add-support-for-bcm6345-style-external-inter.patch deleted file mode 100644 index 9f180ae4da..0000000000 --- a/target/linux/bcm63xx/patches-5.10/321-irqchip-add-support-for-bcm6345-style-external-inter.patch +++ /dev/null @@ -1,394 +0,0 @@ -From cf908990d4a8ccdb73ee4484aa8cadad379ca314 Mon Sep 17 00:00:00 2001 -From: Jonas Gorski <jogo@openwrt.org> -Date: Sun, 30 Nov 2014 14:54:27 +0100 -Subject: [PATCH 2/5] irqchip: add support for bcm6345-style external - interrupt controller - -Signed-off-by: Jonas Gorski <jogo@openwrt.org> ---- - .../interrupt-controller/brcm,bcm6345-ext-intc.txt | 29 ++ - drivers/irqchip/Kconfig | 4 + - drivers/irqchip/Makefile | 1 + - drivers/irqchip/irq-bcm6345-ext.c | 287 ++++++++++++++++++++ - include/linux/irqchip/irq-bcm6345-ext.h | 14 + - 5 files changed, 335 insertions(+) - create mode 100644 Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-ext-intc.txt - create mode 100644 drivers/irqchip/irq-bcm6345-ext.c - create mode 100644 include/linux/irqchip/irq-bcm6345-ext.h - ---- /dev/null -+++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-ext-intc.txt -@@ -0,0 +1,29 @@ -+Broadcom BCM6345-style external interrupt controller -+ -+Required properties: -+ -+- compatible: Should be "brcm,bcm6345-ext-intc" or "brcm,bcm6318-ext-intc". -+- reg: Specifies the base physical addresses and size of the registers. -+- interrupt-controller: identifies the node as an interrupt controller. -+- #interrupt-cells: Specifies the number of cells needed to encode an interrupt -+ source, Should be 2. -+- interrupt-parent: Specifies the phandle to the parent interrupt controller -+ this one is cascaded from. -+- interrupts: Specifies the interrupt line(s) in the interrupt-parent controller -+ node, valid values depend on the type of parent interrupt controller. -+ -+Optional properties: -+ -+- brcm,field-width: Size of each field (mask, clear, sense, ...) in bits in the -+ register. Defaults to 4. -+ -+Example: -+ -+ext_intc: interrupt-controller@10000018 { -+ compatible = "brcm,bcm6345-ext-intc"; -+ interrupt-parent = <&periph_intc>; -+ #interrupt-cells = <2>; -+ reg = <0x10000018 0x4>; -+ interrupt-controller; -+ interrupts = <24>, <25>, <26>, <27>; -+}; ---- a/drivers/irqchip/Kconfig -+++ b/drivers/irqchip/Kconfig -@@ -145,6 +145,10 @@ config DAVINCI_CP_INTC - select GENERIC_IRQ_CHIP - select IRQ_DOMAIN - -+config BCM6345_EXT_IRQ -+ bool -+ select IRQ_DOMAIN -+ - config BCM6345_PERIPH_IRQ - bool - select IRQ_DOMAIN ---- a/drivers/irqchip/Makefile -+++ b/drivers/irqchip/Makefile -@@ -17,6 +17,7 @@ obj-$(CONFIG_ARCH_LPC32XX) += irq-lpc32 - obj-$(CONFIG_ARCH_MMP) += irq-mmp.o - obj-$(CONFIG_IRQ_MXS) += irq-mxs.o - obj-$(CONFIG_ARCH_TEGRA) += irq-tegra.o -+obj-$(CONFIG_BCM6345_EXT_IRQ) += irq-bcm6345-ext.o - obj-$(CONFIG_BCM6345_PERIPH_IRQ) += irq-bcm6345-periph.o - obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o - obj-$(CONFIG_CLPS711X_IRQCHIP) += irq-clps711x.o ---- /dev/null -+++ b/drivers/irqchip/irq-bcm6345-ext.c -@@ -0,0 +1,301 @@ -+/* -+ * This file is subject to the terms and conditions of the GNU General Public -+ * License. See the file "COPYING" in the main directory of this archive -+ * for more details. -+ * -+ * Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org> -+ */ -+ -+#include <linux/ioport.h> -+#include <linux/irq.h> -+#include <linux/irqchip.h> -+#include <linux/irqchip/chained_irq.h> -+#include <linux/irqchip/irq-bcm6345-ext.h> -+#include <linux/kernel.h> -+#include <linux/of.h> -+#include <linux/of_irq.h> -+#include <linux/of_address.h> -+#include <linux/slab.h> -+#include <linux/spinlock.h> -+ -+#ifdef CONFIG_BCM63XX -+#include <asm/mach-bcm63xx/bcm63xx_irq.h> -+ -+#define VIRQ_BASE IRQ_EXTERNAL_BASE -+#else -+#define VIRQ_BASE 0 -+#endif -+ -+#define MAX_IRQS 4 -+ -+#define EXTIRQ_CFG_SENSE 0 -+#define EXTIRQ_CFG_STAT 1 -+#define EXTIRQ_CFG_CLEAR 2 -+#define EXTIRQ_CFG_MASK 3 -+#define EXTIRQ_CFG_BOTHEDGE 4 -+#define EXTIRQ_CFG_LEVELSENSE 5 -+ -+struct intc_data { -+ struct irq_chip chip; -+ struct irq_domain *domain; -+ raw_spinlock_t lock; -+ -+ int parent_irq[MAX_IRQS]; -+ void __iomem *reg; -+ int shift; -+ unsigned int toggle_clear_on_ack:1; -+}; -+ -+static void bcm6345_ext_intc_irq_handle(struct irq_desc *desc) -+{ -+ struct intc_data *data = irq_desc_get_handler_data(desc); -+ struct irq_chip *chip = irq_desc_get_chip(desc); -+ unsigned int irq = irq_desc_get_irq(desc); -+ unsigned int idx; -+ -+ chained_irq_enter(chip, desc); -+ -+ for (idx = 0; idx < MAX_IRQS; idx++) { -+ if (data->parent_irq[idx] != irq) -+ continue; -+ -+ generic_handle_irq(irq_find_mapping(data->domain, idx)); -+ } -+ -+ chained_irq_exit(chip, desc); -+} -+ -+static void bcm6345_ext_intc_irq_ack(struct irq_data *data) -+{ -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ u32 reg; -+ -+ raw_spin_lock(&priv->lock); -+ reg = __raw_readl(priv->reg); -+ __raw_writel(reg | (1 << (hwirq + EXTIRQ_CFG_CLEAR * priv->shift)), -+ priv->reg); -+ if (priv->toggle_clear_on_ack) -+ __raw_writel(reg, priv->reg); -+ raw_spin_unlock(&priv->lock); -+} -+ -+static void bcm6345_ext_intc_irq_mask(struct irq_data *data) -+{ -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ u32 reg; -+ -+ raw_spin_lock(&priv->lock); -+ reg = __raw_readl(priv->reg); -+ reg &= ~(1 << (hwirq + EXTIRQ_CFG_MASK * priv->shift)); -+ __raw_writel(reg, priv->reg); -+ raw_spin_unlock(&priv->lock); -+} -+ -+static void bcm6345_ext_intc_irq_unmask(struct irq_data *data) -+{ -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ u32 reg; -+ -+ raw_spin_lock(&priv->lock); -+ reg = __raw_readl(priv->reg); -+ reg |= 1 << (hwirq + EXTIRQ_CFG_MASK * priv->shift); -+ __raw_writel(reg, priv->reg); -+ raw_spin_unlock(&priv->lock); -+} -+ -+static int bcm6345_ext_intc_set_type(struct irq_data *data, -+ unsigned int flow_type) -+{ -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ bool levelsense = 0, sense = 0, bothedge = 0; -+ u32 reg; -+ -+ flow_type &= IRQ_TYPE_SENSE_MASK; -+ -+ if (flow_type == IRQ_TYPE_NONE) -+ flow_type = IRQ_TYPE_LEVEL_LOW; -+ -+ switch (flow_type) { -+ case IRQ_TYPE_EDGE_BOTH: -+ bothedge = 1; -+ break; -+ -+ case IRQ_TYPE_EDGE_RISING: -+ sense = 1; -+ break; -+ -+ case IRQ_TYPE_EDGE_FALLING: -+ break; -+ -+ case IRQ_TYPE_LEVEL_HIGH: -+ levelsense = 1; -+ sense = 1; -+ break; -+ -+ case IRQ_TYPE_LEVEL_LOW: -+ levelsense = 1; -+ break; -+ -+ default: -+ pr_err("bogus flow type combination given!\n"); -+ return -EINVAL; -+ } -+ -+ raw_spin_lock(&priv->lock); -+ reg = __raw_readl(priv->reg); -+ -+ if (levelsense) -+ reg |= 1 << (hwirq + EXTIRQ_CFG_LEVELSENSE * priv->shift); -+ else -+ reg &= ~(1 << (hwirq + EXTIRQ_CFG_LEVELSENSE * priv->shift)); -+ if (sense) -+ reg |= 1 << (hwirq + EXTIRQ_CFG_SENSE * priv->shift); -+ else -+ reg &= ~(1 << (hwirq + EXTIRQ_CFG_SENSE * priv->shift)); -+ if (bothedge) -+ reg |= 1 << (hwirq + EXTIRQ_CFG_BOTHEDGE * priv->shift); -+ else -+ reg &= ~(1 << (hwirq + EXTIRQ_CFG_BOTHEDGE * priv->shift)); -+ -+ __raw_writel(reg, priv->reg); -+ raw_spin_unlock(&priv->lock); -+ -+ irqd_set_trigger_type(data, flow_type); -+ if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) -+ irq_set_handler_locked(data, handle_level_irq); -+ else -+ irq_set_handler_locked(data, handle_edge_irq); -+ -+ return 0; -+} -+ -+static int bcm6345_ext_intc_map(struct irq_domain *d, unsigned int irq, -+ irq_hw_number_t hw) -+{ -+ struct intc_data *priv = d->host_data; -+ -+ irq_set_chip_and_handler(irq, &priv->chip, handle_level_irq); -+ -+ return 0; -+} -+ -+static const struct irq_domain_ops bcm6345_ext_domain_ops = { -+ .xlate = irq_domain_xlate_twocell, -+ .map = bcm6345_ext_intc_map, -+}; -+ -+static int __init __bcm6345_ext_intc_init(struct device_node *node, -+ int num_irqs, int *irqs, -+ void __iomem *reg, int shift, -+ bool toggle_clear_on_ack) -+{ -+ struct intc_data *data; -+ unsigned int i; -+ int start = VIRQ_BASE; -+ -+ data = kzalloc(sizeof(*data), GFP_KERNEL); -+ if (!data) -+ return -ENOMEM; -+ -+ raw_spin_lock_init(&data->lock); -+ -+ for (i = 0; i < num_irqs; i++) { -+ data->parent_irq[i] = irqs[i]; -+ -+ irq_set_handler_data(irqs[i], data); -+ irq_set_chained_handler(irqs[i], bcm6345_ext_intc_irq_handle); -+ } -+ -+ data->reg = reg; -+ data->shift = shift; -+ data->toggle_clear_on_ack = toggle_clear_on_ack; -+ -+ data->chip.name = "bcm6345-ext-intc"; -+ data->chip.irq_ack = bcm6345_ext_intc_irq_ack; -+ data->chip.irq_mask = bcm6345_ext_intc_irq_mask; -+ data->chip.irq_unmask = bcm6345_ext_intc_irq_unmask; -+ data->chip.irq_set_type = bcm6345_ext_intc_set_type; -+ -+ /* -+ * If we have less than 4 irqs, this is the second controller on -+ * bcm63xx. So increase the VIRQ start to not overlap with the first -+ * one, but only do so if we actually use a non-zero start. -+ * -+ * This can be removed when bcm63xx has no legacy users anymore. -+ */ -+ if (start && num_irqs < 4) -+ start += 4; -+ -+ data->domain = irq_domain_add_simple(node, num_irqs, start, -+ &bcm6345_ext_domain_ops, data); -+ if (!data->domain) { -+ kfree(data); -+ return -ENOMEM; -+ } -+ -+ return 0; -+} -+ -+void __init bcm6345_ext_intc_init(int num_irqs, int *irqs, void __iomem *reg, -+ int shift) -+{ -+ __bcm6345_ext_intc_init(NULL, num_irqs, irqs, reg, shift, false); -+} -+ -+#ifdef CONFIG_OF -+static int __init bcm6345_ext_intc_of_init(struct device_node *node, -+ struct device_node *parent) -+{ -+ int num_irqs, ret = -EINVAL; -+ unsigned i; -+ void __iomem *base; -+ int irqs[MAX_IRQS] = { 0 }; -+ u32 shift; -+ bool toggle_clear_on_ack = false; -+ -+ num_irqs = of_irq_count(node); -+ -+ if (!num_irqs || num_irqs > MAX_IRQS) -+ return -EINVAL; -+ -+ if (of_property_read_u32(node, "brcm,field-width", &shift)) -+ shift = 4; -+ -+ /* on BCM6318 setting CLEAR seems to continuously mask interrupts */ -+ if (of_device_is_compatible(node, "brcm,bcm6318-ext-intc")) -+ toggle_clear_on_ack = true; -+ -+ for (i = 0; i < num_irqs; i++) { -+ irqs[i] = irq_of_parse_and_map(node, i); -+ if (!irqs[i]) { -+ ret = -ENOMEM; -+ goto out_unmap; -+ } -+ } -+ -+ base = of_iomap(node, 0); -+ if (!base) -+ goto out_unmap; -+ -+ ret = __bcm6345_ext_intc_init(node, num_irqs, irqs, base, shift, -+ toggle_clear_on_ack); -+ if (!ret) -+ return 0; -+out_unmap: -+ iounmap(base); -+ -+ for (i = 0; i < num_irqs; i++) -+ irq_dispose_mapping(irqs[i]); -+ -+ return ret; -+} -+ -+IRQCHIP_DECLARE(bcm6318_ext_intc, "brcm,bcm6318-ext-intc", -+ bcm6345_ext_intc_of_init); -+IRQCHIP_DECLARE(bcm6345_ext_intc, "brcm,bcm6345-ext-intc", -+ bcm6345_ext_intc_of_init); -+#endif ---- /dev/null -+++ b/include/linux/irqchip/irq-bcm6345-ext.h -@@ -0,0 +1,14 @@ -+/* -+ * This file is subject to the terms and conditions of the GNU General Public -+ * License. See the file "COPYING" in the main directory of this archive -+ * for more details. -+ * -+ * Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org> -+ */ -+ -+#ifndef __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_EXT_H -+#define __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_EXT_H -+ -+void bcm6345_ext_intc_init(int n_irqs, int *irqs, void __iomem *reg, int shift); -+ -+#endif /* __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_EXT_H */ |