diff options
Diffstat (limited to 'target/linux/bcm63xx/patches-4.19/320-irqchip-add-support-for-bcm6345-style-periphery-irq-.patch')
-rw-r--r-- | target/linux/bcm63xx/patches-4.19/320-irqchip-add-support-for-bcm6345-style-periphery-irq-.patch | 455 |
1 files changed, 0 insertions, 455 deletions
diff --git a/target/linux/bcm63xx/patches-4.19/320-irqchip-add-support-for-bcm6345-style-periphery-irq-.patch b/target/linux/bcm63xx/patches-4.19/320-irqchip-add-support-for-bcm6345-style-periphery-irq-.patch deleted file mode 100644 index b75987ef35..0000000000 --- a/target/linux/bcm63xx/patches-4.19/320-irqchip-add-support-for-bcm6345-style-periphery-irq-.patch +++ /dev/null @@ -1,455 +0,0 @@ -From 301744ecbeece89ab3a9d6beef7802fa22598f00 Mon Sep 17 00:00:00 2001 -From: Jonas Gorski <jogo@openwrt.org> -Date: Sun, 30 Nov 2014 14:53:12 +0100 -Subject: [PATCH 1/5] irqchip: add support for bcm6345-style periphery irq - controller - -Signed-off-by: Jonas Gorski <jogo@openwrt.org> ---- - .../brcm,bcm6345-periph-intc.txt | 50 +++ - drivers/irqchip/Kconfig | 4 + - drivers/irqchip/Makefile | 1 + - drivers/irqchip/irq-bcm6345-periph.c | 339 ++++++++++++++++++++ - include/linux/irqchip/irq-bcm6345-periph.h | 16 + - 5 files changed, 410 insertions(+) - create mode 100644 Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-periph-intc.txt - create mode 100644 drivers/irqchip/irq-bcm6345-periph.c - create mode 100644 include/linux/irqchip/irq-bcm6345-periph.h - ---- /dev/null -+++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm6345-periph-intc.txt -@@ -0,0 +1,50 @@ -+Broadcom BCM6345 Level 1 periphery interrupt controller -+ -+This block is a interrupt controller that is typically connected directly -+to one of the HW INT lines on each CPU. Every BCM63XX xDSL chip since -+BCM6345 has contained this hardware. -+ -+Key elements of the hardware design include: -+ -+- 32, 64, or 128 incoming level IRQ lines -+ -+- All onchip peripherals are wired directly to an L2 input -+ -+- A separate instance of the register set for each CPU, allowing individual -+ peripheral IRQs to be routed to any CPU -+ -+- No atomic mask/unmask operations -+ -+- No polarity/level/edge settings -+ -+- No FIFO or priority encoder logic; software is expected to read all -+ 1-4 status words to determine which IRQs are pending -+ -+Required properties: -+ -+- compatible: Should be "brcm,bcm6345-periph-intc". -+- reg: Specifies the base physical address and size of the registers. -+ Multiple register addresses may be specified, and must match the amount of -+ parent interrupts. -+- interrupt-controller: Identifies the node as an interrupt controller. -+- #interrupt-cells: Specifies the number of cells needed to encode an interrupt -+ source, should be 1. -+- 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. -+ Multiple lines are used to route interrupts to different cpus, with the first -+ assumed to be for the boot CPU. -+ -+Example: -+ -+periph_intc: interrupt-controller@f0406800 { -+ compatible = "brcm,bcm6345-periph-intc"; -+ reg = <0x10000020 0x10>, <0x10000030 0x10>; -+ -+ interrupt-controller; -+ #interrupt-cells = <1>; -+ -+ interrupt-parent = <&cpu_intc>; -+ interrupts = <2>, <3>; -+}; ---- a/drivers/irqchip/Kconfig -+++ b/drivers/irqchip/Kconfig -@@ -129,6 +129,10 @@ config BRCMSTB_L2_IRQ - select GENERIC_IRQ_CHIP - select IRQ_DOMAIN - -+config BCM6345_PERIPH_IRQ -+ bool -+ select IRQ_DOMAIN -+ - config DW_APB_ICTL - bool - select GENERIC_IRQ_CHIP ---- a/drivers/irqchip/Makefile -+++ b/drivers/irqchip/Makefile -@@ -14,6 +14,7 @@ obj-$(CONFIG_ARCH_MMP) += irq-mmp.o - obj-$(CONFIG_IRQ_MXS) += irq-mxs.o - obj-$(CONFIG_ARCH_TEGRA) += irq-tegra.o - obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o -+obj-$(CONFIG_BCM6345_PERIPH_IRQ) += irq-bcm6345-periph.o - obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o - obj-$(CONFIG_CLPS711X_IRQCHIP) += irq-clps711x.o - obj-$(CONFIG_OMPIC) += irq-ompic.o ---- /dev/null -+++ b/drivers/irqchip/irq-bcm6345-periph.c -@@ -0,0 +1,339 @@ -+/* -+ * 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-periph.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_INTERNAL_BASE -+#else -+#define VIRQ_BASE 0 -+#endif -+ -+#define MAX_WORDS 4 -+#define MAX_PARENT_IRQS 2 -+#define IRQS_PER_WORD 32 -+ -+struct intc_block { -+ int parent_irq; -+ void __iomem *base; -+ void __iomem *en_reg[MAX_WORDS]; -+ void __iomem *status_reg[MAX_WORDS]; -+ u32 mask_cache[MAX_WORDS]; -+}; -+ -+struct intc_data { -+ struct irq_chip chip; -+ struct intc_block block[MAX_PARENT_IRQS]; -+ -+ int num_words; -+ -+ struct irq_domain *domain; -+ raw_spinlock_t lock; -+}; -+ -+static void bcm6345_periph_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); -+ struct intc_block *block; -+ unsigned int irq = irq_desc_get_irq(desc); -+ unsigned int idx; -+ -+ chained_irq_enter(chip, desc); -+ -+ for (idx = 0; idx < MAX_PARENT_IRQS; idx++) -+ if (irq == data->block[idx].parent_irq) -+ block = &data->block[idx]; -+ -+ for (idx = 0; idx < data->num_words; idx++) { -+ int base = idx * IRQS_PER_WORD; -+ unsigned long pending; -+ int hw_irq; -+ -+ raw_spin_lock(&data->lock); -+ pending = __raw_readl(block->en_reg[idx]) & -+ __raw_readl(block->status_reg[idx]); -+ raw_spin_unlock(&data->lock); -+ -+ for_each_set_bit(hw_irq, &pending, IRQS_PER_WORD) { -+ int virq; -+ -+ virq = irq_find_mapping(data->domain, base + hw_irq); -+ generic_handle_irq(virq); -+ } -+ } -+ -+ chained_irq_exit(chip, desc); -+} -+ -+static void __bcm6345_periph_enable(struct intc_block *block, int reg, int bit, -+ bool enable) -+{ -+ u32 val; -+ -+ val = __raw_readl(block->en_reg[reg]); -+ if (enable) -+ val |= BIT(bit); -+ else -+ val &= ~BIT(bit); -+ __raw_writel(val, block->en_reg[reg]); -+} -+ -+static void bcm6345_periph_irq_mask(struct irq_data *data) -+{ -+ unsigned int i, reg, bit; -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ -+ reg = hwirq / IRQS_PER_WORD; -+ bit = hwirq % IRQS_PER_WORD; -+ -+ raw_spin_lock(&priv->lock); -+ for (i = 0; i < MAX_PARENT_IRQS; i++) { -+ struct intc_block *block = &priv->block[i]; -+ -+ if (!block->parent_irq) -+ break; -+ -+ __bcm6345_periph_enable(block, reg, bit, false); -+ } -+ raw_spin_unlock(&priv->lock); -+} -+ -+static void bcm6345_periph_irq_unmask(struct irq_data *data) -+{ -+ struct intc_data *priv = data->domain->host_data; -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ unsigned int i, reg, bit; -+ -+ reg = hwirq / IRQS_PER_WORD; -+ bit = hwirq % IRQS_PER_WORD; -+ -+ raw_spin_lock(&priv->lock); -+ for (i = 0; i < MAX_PARENT_IRQS; i++) { -+ struct intc_block *block = &priv->block[i]; -+ -+ if (!block->parent_irq) -+ break; -+ -+ if (block->mask_cache[reg] & BIT(bit)) -+ __bcm6345_periph_enable(block, reg, bit, true); -+ else -+ __bcm6345_periph_enable(block, reg, bit, false); -+ } -+ raw_spin_unlock(&priv->lock); -+} -+ -+#ifdef CONFIG_SMP -+static int bcm6345_periph_set_affinity(struct irq_data *data, -+ const struct cpumask *mask, bool force) -+{ -+ irq_hw_number_t hwirq = irqd_to_hwirq(data); -+ struct intc_data *priv = data->domain->host_data; -+ unsigned int i, reg, bit; -+ unsigned long flags; -+ bool enabled; -+ int cpu; -+ -+ reg = hwirq / IRQS_PER_WORD; -+ bit = hwirq % IRQS_PER_WORD; -+ -+ /* we could route to more than one cpu, but performance -+ suffers, so fix it to one. -+ */ -+ cpu = cpumask_any_and(mask, cpu_online_mask); -+ if (cpu >= nr_cpu_ids) -+ return -EINVAL; -+ -+ if (cpu >= MAX_PARENT_IRQS) -+ return -EINVAL; -+ -+ if (!priv->block[cpu].parent_irq) -+ return -EINVAL; -+ -+ raw_spin_lock_irqsave(&priv->lock, flags); -+ enabled = !irqd_irq_masked(data); -+ for (i = 0; i < MAX_PARENT_IRQS; i++) { -+ struct intc_block *block = &priv->block[i]; -+ -+ if (!block->parent_irq) -+ break; -+ -+ if (i == cpu) { -+ block->mask_cache[reg] |= BIT(bit); -+ __bcm6345_periph_enable(block, reg, bit, enabled); -+ } else { -+ block->mask_cache[reg] &= ~BIT(bit); -+ __bcm6345_periph_enable(block, reg, bit, false); -+ } -+ } -+ raw_spin_unlock_irqrestore(&priv->lock, flags); -+ -+ return 0; -+} -+#endif -+ -+static int bcm6345_periph_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_periph_domain_ops = { -+ .xlate = irq_domain_xlate_onecell, -+ .map = bcm6345_periph_map, -+}; -+ -+static int __init __bcm6345_periph_intc_init(struct device_node *node, -+ int num_blocks, int *irq, -+ void __iomem **base, int num_words) -+{ -+ struct intc_data *data; -+ unsigned int i, w, status_offset; -+ -+ data = kzalloc(sizeof(*data), GFP_KERNEL); -+ if (!data) -+ return -ENOMEM; -+ -+ raw_spin_lock_init(&data->lock); -+ -+ status_offset = num_words * sizeof(u32); -+ -+ for (i = 0; i < num_blocks; i++) { -+ struct intc_block *block = &data->block[i]; -+ -+ block->parent_irq = irq[i]; -+ block->base = base[i]; -+ -+ for (w = 0; w < num_words; w++) { -+ int word_offset = sizeof(u32) * ((num_words - w) - 1); -+ -+ block->en_reg[w] = base[i] + word_offset; -+ block->status_reg[w] = base[i] + status_offset; -+ block->status_reg[w] += word_offset; -+ -+ /* route all interrupts to line 0 by default */ -+ if (i == 0) -+ block->mask_cache[w] = 0xffffffff; -+ } -+ -+ irq_set_handler_data(block->parent_irq, data); -+ irq_set_chained_handler(block->parent_irq, -+ bcm6345_periph_irq_handle); -+ } -+ -+ data->num_words = num_words; -+ -+ data->chip.name = "bcm6345-periph-intc"; -+ data->chip.irq_mask = bcm6345_periph_irq_mask; -+ data->chip.irq_unmask = bcm6345_periph_irq_unmask; -+ -+#ifdef CONFIG_SMP -+ if (num_blocks > 1) -+ data->chip.irq_set_affinity = bcm6345_periph_set_affinity; -+#endif -+ -+ data->domain = irq_domain_add_simple(node, IRQS_PER_WORD * num_words, -+ VIRQ_BASE, -+ &bcm6345_periph_domain_ops, data); -+ if (!data->domain) { -+ kfree(data); -+ return -EINVAL; -+ } -+ -+ return 0; -+} -+ -+void __init bcm6345_periph_intc_init(int num_blocks, int *irq, -+ void __iomem **base, int num_words) -+{ -+ __bcm6345_periph_intc_init(NULL, num_blocks, irq, base, num_words); -+} -+ -+#ifdef CONFIG_OF -+static int __init bcm6345_periph_of_init(struct device_node *node, -+ struct device_node *parent) -+{ -+ struct resource res; -+ int num_irqs, ret = -EINVAL; -+ int irqs[MAX_PARENT_IRQS] = { 0 }; -+ void __iomem *bases[MAX_PARENT_IRQS] = { NULL }; -+ int words = 0; -+ int i; -+ -+ num_irqs = of_irq_count(node); -+ -+ if (num_irqs < 1 || num_irqs > MAX_PARENT_IRQS) -+ return -EINVAL; -+ -+ for (i = 0; i < num_irqs; i++) { -+ resource_size_t size; -+ -+ irqs[i] = irq_of_parse_and_map(node, i); -+ if (!irqs[i]) -+ goto out_unmap; -+ -+ if (of_address_to_resource(node, i, &res)) -+ goto out_unmap; -+ -+ size = resource_size(&res); -+ switch (size) { -+ case 8: -+ case 16: -+ case 32: -+ size = size / 8; -+ break; -+ default: -+ goto out_unmap; -+ } -+ -+ if (words && words != size) { -+ ret = -EINVAL; -+ goto out_unmap; -+ } -+ words = size; -+ -+ bases[i] = of_iomap(node, i); -+ if (!bases[i]) { -+ ret = -ENOMEM; -+ goto out_unmap; -+ } -+ } -+ -+ ret = __bcm6345_periph_intc_init(node, num_irqs, irqs, bases, words); -+ if (!ret) -+ return 0; -+ -+out_unmap: -+ for (i = 0; i < num_irqs; i++) { -+ iounmap(bases[i]); -+ irq_dispose_mapping(irqs[i]); -+ } -+ -+ return ret; -+} -+ -+IRQCHIP_DECLARE(bcm6345_periph_intc, "brcm,bcm6345-l1-intc", -+ bcm6345_periph_of_init); -+#endif ---- /dev/null -+++ b/include/linux/irqchip/irq-bcm6345-periph.h -@@ -0,0 +1,16 @@ -+/* -+ * 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) 2008 Maxime Bizon <mbizon@freebox.fr> -+ * Copyright (C) 2008 Nicolas Schichan <nschichan@freebox.fr> -+ */ -+ -+#ifndef __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_PERIPH_H -+#define __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_PERIPH_H -+ -+void bcm6345_periph_intc_init(int num_blocks, int *irq, void __iomem **base, -+ int num_words); -+ -+#endif /* __INCLUDE_LINUX_IRQCHIP_IRQ_BCM6345_PERIPH_H */ |