diff options
| -rw-r--r-- | Documentation/devicetree/bindings/interrupt-controller/st,sti-irq-syscfg.txt | 35 | ||||
| -rw-r--r-- | drivers/irqchip/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 1 | ||||
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 105 | ||||
| -rw-r--r-- | drivers/irqchip/irq-gic.c | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irq-renesas-irqc.c | 4 | ||||
| -rw-r--r-- | drivers/irqchip/irq-st.c | 206 | ||||
| -rw-r--r-- | include/dt-bindings/interrupt-controller/irq-st.h | 30 |
8 files changed, 357 insertions, 33 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/st,sti-irq-syscfg.txt b/Documentation/devicetree/bindings/interrupt-controller/st,sti-irq-syscfg.txt new file mode 100644 index 000000000000..ced6014061a3 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/st,sti-irq-syscfg.txt @@ -0,0 +1,35 @@ +STMicroelectronics STi System Configuration Controlled IRQs +----------------------------------------------------------- + +On STi based systems; External, CTI (Core Sight), PMU (Performance Management), +and PL310 L2 Cache IRQs are controlled using System Configuration registers. +This driver is used to unmask them prior to use. + +Required properties: +- compatible : Should be set to one of: + "st,stih415-irq-syscfg" + "st,stih416-irq-syscfg" + "st,stih407-irq-syscfg" + "st,stid127-irq-syscfg" +- st,syscfg : Phandle to Cortex-A9 IRQ system config registers +- st,irq-device : Array of IRQs to enable - should be 2 in length +- st,fiq-device : Array of FIQs to enable - should be 2 in length + +Optional properties: +- st,invert-ext : External IRQs can be inverted at will. This property inverts + these IRQs using bitwise logic. A number of defines have been + provided for convenience: + ST_IRQ_SYSCFG_EXT_1_INV + ST_IRQ_SYSCFG_EXT_2_INV + ST_IRQ_SYSCFG_EXT_3_INV +Example: + +irq-syscfg { + compatible = "st,stih416-irq-syscfg"; + st,syscfg = <&syscfg_cpu>; + st,irq-device = <ST_IRQ_SYSCFG_PMU_0>, + <ST_IRQ_SYSCFG_PMU_1>; + st,fiq-device = <ST_IRQ_SYSCFG_DISABLED>, + <ST_IRQ_SYSCFG_DISABLED>; + st,invert-ext = <(ST_IRQ_SYSCFG_EXT_1_INV | ST_IRQ_SYSCFG_EXT_3_INV)>; +}; diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index cc79d2a5a8c2..c8d260e33a90 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -110,6 +110,13 @@ config RENESAS_IRQC bool select IRQ_DOMAIN +config ST_IRQCHIP + bool + select REGMAP + select MFD_SYSCON + help + Enables SysCfg Controlled IRQs on STi based platforms. + config TB10X_IRQC bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 9176c76eb164..f117092ae014 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o +obj-$(CONFIG_ST_IRQCHIP) += irq-st.o obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 463c235acbdc..b36373c019ba 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -38,6 +38,8 @@ /* Interrupt Controller Registers Map */ #define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48) #define ARMADA_370_XP_INT_CLEAR_MASK_OFFS (0x4C) +#define ARMADA_370_XP_INT_FABRIC_MASK_OFFS (0x54) +#define ARMADA_370_XP_INT_CAUSE_PERF(cpu) (1 << cpu) #define ARMADA_370_XP_INT_CONTROL (0x00) #define ARMADA_370_XP_INT_SET_ENABLE_OFFS (0x30) @@ -56,6 +58,7 @@ #define ARMADA_370_XP_MAX_PER_CPU_IRQS (28) #define ARMADA_370_XP_TIMER0_PER_CPU_IRQ (5) +#define ARMADA_370_XP_FABRIC_IRQ (3) #define IPI_DOORBELL_START (0) #define IPI_DOORBELL_END (8) @@ -69,6 +72,7 @@ static void __iomem *per_cpu_int_base; static void __iomem *main_int_base; static struct irq_domain *armada_370_xp_mpic_domain; static u32 doorbell_mask_reg; +static int parent_irq; #ifdef CONFIG_PCI_MSI static struct irq_domain *armada_370_xp_msi_domain; static DECLARE_BITMAP(msi_used, PCI_MSI_DOORBELL_NR); @@ -76,6 +80,17 @@ static DEFINE_MUTEX(msi_used_lock); static phys_addr_t msi_doorbell_addr; #endif +static inline bool is_percpu_irq(irq_hw_number_t irq) +{ + switch (irq) { + case ARMADA_370_XP_TIMER0_PER_CPU_IRQ: + case ARMADA_370_XP_FABRIC_IRQ: + return true; + default: + return false; + } +} + /* * In SMP mode: * For shared global interrupts, mask/unmask global enable bit @@ -85,7 +100,7 @@ static void armada_370_xp_irq_mask(struct irq_data *d) { irq_hw_number_t hwirq = irqd_to_hwirq(d); - if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + if (!is_percpu_irq(hwirq)) writel(hwirq, main_int_base + ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS); else @@ -97,7 +112,7 @@ static void armada_370_xp_irq_unmask(struct irq_data *d) { irq_hw_number_t hwirq = irqd_to_hwirq(d); - if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + if (!is_percpu_irq(hwirq)) writel(hwirq, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS); else @@ -286,14 +301,14 @@ static int armada_370_xp_mpic_irq_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw) { armada_370_xp_irq_mask(irq_get_irq_data(virq)); - if (hw != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + if (!is_percpu_irq(hw)) writel(hw, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); else writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS); irq_set_status_flags(virq, IRQ_LEVEL); - if (hw == ARMADA_370_XP_TIMER0_PER_CPU_IRQ) { + if (is_percpu_irq(hw)) { irq_set_percpu_devid(virq); irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip, handle_percpu_devid_irq); @@ -307,28 +322,6 @@ static int armada_370_xp_mpic_irq_map(struct irq_domain *h, return 0; } -#ifdef CONFIG_SMP -static void armada_mpic_send_doorbell(const struct cpumask *mask, - unsigned int irq) -{ - int cpu; - unsigned long map = 0; - - /* Convert our logical CPU mask into a physical one. */ - for_each_cpu(cpu, mask) - map |= 1 << cpu_logical_map(cpu); - - /* - * Ensure that stores to Normal memory are visible to the - * other CPUs before issuing the IPI. - */ - dsb(); - - /* submit softirq */ - writel((map << 8) | irq, main_int_base + - ARMADA_370_XP_SW_TRIG_INT_OFFS); -} - static void armada_xp_mpic_smp_cpu_init(void) { u32 control; @@ -351,11 +344,45 @@ static void armada_xp_mpic_smp_cpu_init(void) writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); } +static void armada_xp_mpic_perf_init(void) +{ + unsigned long cpuid = cpu_logical_map(smp_processor_id()); + + /* Enable Performance Counter Overflow interrupts */ + writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid), + per_cpu_int_base + ARMADA_370_XP_INT_FABRIC_MASK_OFFS); +} + +#ifdef CONFIG_SMP +static void armada_mpic_send_doorbell(const struct cpumask *mask, + unsigned int irq) +{ + int cpu; + unsigned long map = 0; + + /* Convert our logical CPU mask into a physical one. */ + for_each_cpu(cpu, mask) + map |= 1 << cpu_logical_map(cpu); + + /* + * Ensure that stores to Normal memory are visible to the + * other CPUs before issuing the IPI. + */ + dsb(); + + /* submit softirq */ + writel((map << 8) | irq, main_int_base + + ARMADA_370_XP_SW_TRIG_INT_OFFS); +} + static int armada_xp_mpic_secondary_init(struct notifier_block *nfb, unsigned long action, void *hcpu) { - if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) + if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) { + armada_xp_mpic_perf_init(); armada_xp_mpic_smp_cpu_init(); + } + return NOTIFY_OK; } @@ -364,6 +391,21 @@ static struct notifier_block armada_370_xp_mpic_cpu_notifier = { .priority = 100, }; +static int mpic_cascaded_secondary_init(struct notifier_block *nfb, + unsigned long action, void *hcpu) +{ + if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) { + armada_xp_mpic_perf_init(); + enable_percpu_irq(parent_irq, IRQ_TYPE_NONE); + } + + return NOTIFY_OK; +} + +static struct notifier_block mpic_cascaded_cpu_notifier = { + .notifier_call = mpic_cascaded_secondary_init, + .priority = 100, +}; #endif /* CONFIG_SMP */ static struct irq_domain_ops armada_370_xp_mpic_irq_ops = { @@ -539,7 +581,7 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node, struct device_node *parent) { struct resource main_int_res, per_cpu_int_res; - int parent_irq, nr_irqs, i; + int nr_irqs, i; u32 control; BUG_ON(of_address_to_resource(node, 0, &main_int_res)); @@ -572,9 +614,9 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node, BUG_ON(!armada_370_xp_mpic_domain); -#ifdef CONFIG_SMP + /* Setup for the boot CPU */ + armada_xp_mpic_perf_init(); armada_xp_mpic_smp_cpu_init(); -#endif armada_370_xp_msi_init(node, main_int_res.start); @@ -587,6 +629,9 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node, register_cpu_notifier(&armada_370_xp_mpic_cpu_notifier); #endif } else { +#ifdef CONFIG_SMP + register_cpu_notifier(&mpic_cascaded_cpu_notifier); +#endif irq_set_chained_handler(parent_irq, armada_370_xp_mpic_handle_cascade_irq); } diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 4634cf7d0ec3..50e70a8c7ec4 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -349,7 +349,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic) break; } - if (!mask) + if (!mask && num_possible_cpus() > 1) pr_crit("GIC CPU mask not found - kernel will fail to boot.\n"); return mask; diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c index 384e6ed61d7c..2ea3412fdf8c 100644 --- a/drivers/irqchip/irq-renesas-irqc.c +++ b/drivers/irqchip/irq-renesas-irqc.c @@ -94,7 +94,7 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type) struct irqc_priv *p = irq_data_get_irq_chip_data(d); int hw_irq = irqd_to_hwirq(d); unsigned char value = irqc_sense[type & IRQ_TYPE_SENSE_MASK]; - unsigned long tmp; + u32 tmp; irqc_dbg(&p->irq[hw_irq], "sense"); @@ -112,7 +112,7 @@ static irqreturn_t irqc_irq_handler(int irq, void *dev_id) { struct irqc_irq *i = dev_id; struct irqc_priv *p = i->p; - unsigned long bit = BIT(i->hw_irq); + u32 bit = BIT(i->hw_irq); irqc_dbg(i, "demux1"); diff --git a/drivers/irqchip/irq-st.c b/drivers/irqchip/irq-st.c new file mode 100644 index 000000000000..9af48a85c16f --- /dev/null +++ b/drivers/irqchip/irq-st.c @@ -0,0 +1,206 @@ +/* + * Copyright (C) 2014 STMicroelectronics – All Rights Reserved + * + * Author: Lee Jones <lee.jones@linaro.org> + * + * This is a re-write of Christophe Kerello's PMU driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <dt-bindings/interrupt-controller/irq-st.h> +#include <linux/err.h> +#include <linux/mfd/syscon.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#define STIH415_SYSCFG_642 0x0a8 +#define STIH416_SYSCFG_7543 0x87c +#define STIH407_SYSCFG_5102 0x198 +#define STID127_SYSCFG_734 0x088 + +#define ST_A9_IRQ_MASK 0x001FFFFF +#define ST_A9_IRQ_MAX_CHANS 2 + +#define ST_A9_IRQ_EN_CTI_0 BIT(0) +#define ST_A9_IRQ_EN_CTI_1 BIT(1) +#define ST_A9_IRQ_EN_PMU_0 BIT(2) +#define ST_A9_IRQ_EN_PMU_1 BIT(3) +#define ST_A9_IRQ_EN_PL310_L2 BIT(4) +#define ST_A9_IRQ_EN_EXT_0 BIT(5) +#define ST_A9_IRQ_EN_EXT_1 BIT(6) +#define ST_A9_IRQ_EN_EXT_2 BIT(7) + +#define ST_A9_FIQ_N_SEL(dev, chan) (dev << (8 + (chan * 3))) +#define ST_A9_IRQ_N_SEL(dev, chan) (dev << (14 + (chan * 3))) +#define ST_A9_EXTIRQ_INV_SEL(dev) (dev << 20) + +struct st_irq_syscfg { + struct regmap *regmap; + unsigned int syscfg; + unsigned int config; + bool ext_inverted; +}; + +static const struct of_device_id st_irq_syscfg_match[] = { + { + .compatible = "st,stih415-irq-syscfg", + .data = (void *)STIH415_SYSCFG_642, + }, + { + .compatible = "st,stih416-irq-syscfg", + .data = (void *)STIH416_SYSCFG_7543, + }, + { + .compatible = "st,stih407-irq-syscfg", + .data = (void *)STIH407_SYSCFG_5102, + }, + { + .compatible = "st,stid127-irq-syscfg", + .data = (void *)STID127_SYSCFG_734, + }, + {} +}; + +static int st_irq_xlate(struct platform_device *pdev, + int device, int channel, bool irq) +{ + struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev); + + /* Set the device enable bit. */ + switch (device) { + case ST_IRQ_SYSCFG_EXT_0: + ddata->config |= ST_A9_IRQ_EN_EXT_0; + break; + case ST_IRQ_SYSCFG_EXT_1: + ddata->config |= ST_A9_IRQ_EN_EXT_1; + break; + case ST_IRQ_SYSCFG_EXT_2: + ddata->config |= ST_A9_IRQ_EN_EXT_2; + break; + case ST_IRQ_SYSCFG_CTI_0: + ddata->config |= ST_A9_IRQ_EN_CTI_0; + break; + case ST_IRQ_SYSCFG_CTI_1: + ddata->config |= ST_A9_IRQ_EN_CTI_1; + break; + case ST_IRQ_SYSCFG_PMU_0: + ddata->config |= ST_A9_IRQ_EN_PMU_0; + break; + case ST_IRQ_SYSCFG_PMU_1: + ddata->config |= ST_A9_IRQ_EN_PMU_1; + break; + case ST_IRQ_SYSCFG_pl310_L2: + ddata->config |= ST_A9_IRQ_EN_PL310_L2; + break; + case ST_IRQ_SYSCFG_DISABLED: + return 0; + default: + dev_err(&pdev->dev, "Unrecognised device %d\n", device); + return -EINVAL; + } + + /* Select IRQ/FIQ channel for device. */ + ddata->config |= irq ? + ST_A9_IRQ_N_SEL(device, channel) : + ST_A9_FIQ_N_SEL(device, channel); + + return 0; +} + +static int st_irq_syscfg_enable(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev); + int channels, ret, i; + u32 device, invert; + + channels = of_property_count_u32_elems(np, "st,irq-device"); + if (channels != ST_A9_IRQ_MAX_CHANS) { + dev_err(&pdev->dev, "st,enable-irq-device must have 2 elems\n"); + return -EINVAL; + } + + channels = of_property_count_u32_elems(np, "st,fiq-device"); + if (channels != ST_A9_IRQ_MAX_CHANS) { + dev_err(&pdev->dev, "st,enable-fiq-device must have 2 elems\n"); + return -EINVAL; + } + + for (i = 0; i < ST_A9_IRQ_MAX_CHANS; i++) { + of_property_read_u32_index(np, "st,irq-device", i, &device); + + ret = st_irq_xlate(pdev, device, i, true); + if (ret) + return ret; + + of_property_read_u32_index(np, "st,fiq-device", i, &device); + + ret = st_irq_xlate(pdev, device, i, false); + if (ret) + return ret; + } + + /* External IRQs may be inverted. */ + of_property_read_u32(np, "st,invert-ext", &invert); + ddata->config |= ST_A9_EXTIRQ_INV_SEL(invert); + + return regmap_update_bits(ddata->regmap, ddata->syscfg, + ST_A9_IRQ_MASK, ddata->config); +} + +static int st_irq_syscfg_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *match; + struct st_irq_syscfg *ddata; + + ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + match = of_match_device(st_irq_syscfg_match, &pdev->dev); + if (!match) + return -ENODEV; + + ddata->syscfg = (unsigned int)match->data; + + ddata->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(ddata->regmap)) { + dev_err(&pdev->dev, "syscfg phandle missing\n"); + return PTR_ERR(ddata->regmap); + } + + dev_set_drvdata(&pdev->dev, ddata); + + return st_irq_syscfg_enable(pdev); +} + +static int st_irq_syscfg_resume(struct device *dev) +{ + struct st_irq_syscfg *ddata = dev_get_drvdata(dev); + + return regmap_update_bits(ddata->regmap, ddata->syscfg, + ST_A9_IRQ_MASK, ddata->config); +} + +static SIMPLE_DEV_PM_OPS(st_irq_syscfg_pm_ops, NULL, st_irq_syscfg_resume); + +static struct platform_driver st_irq_syscfg_driver = { + .driver = { + .name = "st_irq_syscfg", + .pm = &st_irq_syscfg_pm_ops, + .of_match_table = st_irq_syscfg_match, + }, + .probe = st_irq_syscfg_probe, +}; + +static int __init st_irq_syscfg_init(void) +{ + return platform_driver_register(&st_irq_syscfg_driver); +} +core_initcall(st_irq_syscfg_init); diff --git a/include/dt-bindings/interrupt-controller/irq-st.h b/include/dt-bindings/interrupt-controller/irq-st.h new file mode 100644 index 000000000000..4c59aceb9be0 --- /dev/null +++ b/include/dt-bindings/interrupt-controller/irq-st.h @@ -0,0 +1,30 @@ +/* + * include/linux/irqchip/irq-st.h + * + * Copyright (C) 2014 STMicroelectronics – All Rights Reserved + * + * Author: Lee Jones <lee.jones@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H +#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H + +#define ST_IRQ_SYSCFG_EXT_0 0 +#define ST_IRQ_SYSCFG_EXT_1 1 +#define ST_IRQ_SYSCFG_EXT_2 2 +#define ST_IRQ_SYSCFG_CTI_0 3 +#define ST_IRQ_SYSCFG_CTI_1 4 +#define ST_IRQ_SYSCFG_PMU_0 5 +#define ST_IRQ_SYSCFG_PMU_1 6 +#define ST_IRQ_SYSCFG_pl310_L2 7 +#define ST_IRQ_SYSCFG_DISABLED 0xFFFFFFFF + +#define ST_IRQ_SYSCFG_EXT_1_INV 0x1 +#define ST_IRQ_SYSCFG_EXT_2_INV 0x2 +#define ST_IRQ_SYSCFG_EXT_3_INV 0x4 + +#endif |