diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 42f2278a702d..20b77fbc51ee 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -212,11 +212,6 @@ config HISILICON_IRQ_MBIGEN select ARM_GIC_V3 select ARM_GIC_V3_ITS -config IMGPDC_IRQ - bool - select GENERIC_IRQ_CHIP - select IRQ_DOMAIN - config IXP4XX_IRQ bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 74912429c59f..ab33cccd8471 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -44,7 +44,6 @@ obj-$(CONFIG_ARMADA_370_XP_IRQ) += irq-armada-370-xp.o obj-$(CONFIG_ATMEL_AIC_IRQ) += irq-atmel-aic-common.o irq-atmel-aic.o obj-$(CONFIG_ATMEL_AIC5_IRQ) += irq-atmel-aic-common.o irq-atmel-aic5.o obj-$(CONFIG_I8259) += irq-i8259.o -obj-$(CONFIG_IMGPDC_IRQ) += irq-imgpdc.o obj-$(CONFIG_IRQ_MIPS_CPU) += irq-mips-cpu.o obj-$(CONFIG_IXP4XX_IRQ) += irq-ixp4xx.o obj-$(CONFIG_JCORE_AIC) += irq-jcore-aic.o diff --git a/drivers/irqchip/irq-imgpdc.c b/drivers/irqchip/irq-imgpdc.c deleted file mode 100644 index 4feef4ab5fec..000000000000 --- a/drivers/irqchip/irq-imgpdc.c +++ /dev/null @@ -1,495 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * IMG PowerDown Controller (PDC) - * - * Copyright 2010-2013 Imagination Technologies Ltd. - * - * Exposes the syswake and PDC peripheral wake interrupts to the system. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -/* PDC interrupt register numbers */ - -#define PDC_IRQ_STATUS 0x310 -#define PDC_IRQ_ENABLE 0x314 -#define PDC_IRQ_CLEAR 0x318 -#define PDC_IRQ_ROUTE 0x31c -#define PDC_SYS_WAKE_BASE 0x330 -#define PDC_SYS_WAKE_STRIDE 0x8 -#define PDC_SYS_WAKE_CONFIG_BASE 0x334 -#define PDC_SYS_WAKE_CONFIG_STRIDE 0x8 - -/* PDC interrupt register field masks */ - -#define PDC_IRQ_SYS3 0x08 -#define PDC_IRQ_SYS2 0x04 -#define PDC_IRQ_SYS1 0x02 -#define PDC_IRQ_SYS0 0x01 -#define PDC_IRQ_ROUTE_WU_EN_SYS3 0x08000000 -#define PDC_IRQ_ROUTE_WU_EN_SYS2 0x04000000 -#define PDC_IRQ_ROUTE_WU_EN_SYS1 0x02000000 -#define PDC_IRQ_ROUTE_WU_EN_SYS0 0x01000000 -#define PDC_IRQ_ROUTE_WU_EN_WD 0x00040000 -#define PDC_IRQ_ROUTE_WU_EN_IR 0x00020000 -#define PDC_IRQ_ROUTE_WU_EN_RTC 0x00010000 -#define PDC_IRQ_ROUTE_EXT_EN_SYS3 0x00000800 -#define PDC_IRQ_ROUTE_EXT_EN_SYS2 0x00000400 -#define PDC_IRQ_ROUTE_EXT_EN_SYS1 0x00000200 -#define PDC_IRQ_ROUTE_EXT_EN_SYS0 0x00000100 -#define PDC_IRQ_ROUTE_EXT_EN_WD 0x00000004 -#define PDC_IRQ_ROUTE_EXT_EN_IR 0x00000002 -#define PDC_IRQ_ROUTE_EXT_EN_RTC 0x00000001 -#define PDC_SYS_WAKE_RESET 0x00000010 -#define PDC_SYS_WAKE_INT_MODE 0x0000000e -#define PDC_SYS_WAKE_INT_MODE_SHIFT 1 -#define PDC_SYS_WAKE_PIN_VAL 0x00000001 - -/* PDC interrupt constants */ - -#define PDC_SYS_WAKE_INT_LOW 0x0 -#define PDC_SYS_WAKE_INT_HIGH 0x1 -#define PDC_SYS_WAKE_INT_DOWN 0x2 -#define PDC_SYS_WAKE_INT_UP 0x3 -#define PDC_SYS_WAKE_INT_CHANGE 0x6 -#define PDC_SYS_WAKE_INT_NONE 0x4 - -/** - * struct pdc_intc_priv - private pdc interrupt data. - * @nr_perips: Number of peripheral interrupt signals. - * @nr_syswakes: Number of syswake signals. - * @perip_irqs: List of peripheral IRQ numbers handled. - * @syswake_irq: Shared PDC syswake IRQ number. - * @domain: IRQ domain for PDC peripheral and syswake IRQs. - * @pdc_base: Base of PDC registers. - * @irq_route: Cached version of PDC_IRQ_ROUTE register. - * @lock: Lock to protect the PDC syswake registers and the cached - * values of those registers in this struct. - */ -struct pdc_intc_priv { - unsigned int nr_perips; - unsigned int nr_syswakes; - unsigned int *perip_irqs; - unsigned int syswake_irq; - struct irq_domain *domain; - void __iomem *pdc_base; - - u32 irq_route; - raw_spinlock_t lock; -}; - -static void pdc_write(struct pdc_intc_priv *priv, unsigned int reg_offs, - unsigned int data) -{ - iowrite32(data, priv->pdc_base + reg_offs); -} - -static unsigned int pdc_read(struct pdc_intc_priv *priv, - unsigned int reg_offs) -{ - return ioread32(priv->pdc_base + reg_offs); -} - -/* Generic IRQ callbacks */ - -#define SYS0_HWIRQ 8 - -static unsigned int hwirq_is_syswake(irq_hw_number_t hw) -{ - return hw >= SYS0_HWIRQ; -} - -static unsigned int hwirq_to_syswake(irq_hw_number_t hw) -{ - return hw - SYS0_HWIRQ; -} - -static irq_hw_number_t syswake_to_hwirq(unsigned int syswake) -{ - return SYS0_HWIRQ + syswake; -} - -static struct pdc_intc_priv *irqd_to_priv(struct irq_data *data) -{ - return (struct pdc_intc_priv *)data->domain->host_data; -} - -/* - * perip_irq_mask() and perip_irq_unmask() use IRQ_ROUTE which also contains - * wake bits, therefore we cannot use the generic irqchip mask callbacks as they - * cache the mask. - */ - -static void perip_irq_mask(struct irq_data *data) -{ - struct pdc_intc_priv *priv = irqd_to_priv(data); - - raw_spin_lock(&priv->lock); - priv->irq_route &= ~data->mask; - pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route); - raw_spin_unlock(&priv->lock); -} - -static void perip_irq_unmask(struct irq_data *data) -{ - struct pdc_intc_priv *priv = irqd_to_priv(data); - - raw_spin_lock(&priv->lock); - priv->irq_route |= data->mask; - pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route); - raw_spin_unlock(&priv->lock); -} - -static int syswake_irq_set_type(struct irq_data *data, unsigned int flow_type) -{ - struct pdc_intc_priv *priv = irqd_to_priv(data); - unsigned int syswake = hwirq_to_syswake(data->hwirq); - unsigned int irq_mode; - unsigned int soc_sys_wake_regoff, soc_sys_wake; - - /* translate to syswake IRQ mode */ - switch (flow_type) { - case IRQ_TYPE_EDGE_BOTH: - irq_mode = PDC_SYS_WAKE_INT_CHANGE; - break; - case IRQ_TYPE_EDGE_RISING: - irq_mode = PDC_SYS_WAKE_INT_UP; - break; - case IRQ_TYPE_EDGE_FALLING: - irq_mode = PDC_SYS_WAKE_INT_DOWN; - break; - case IRQ_TYPE_LEVEL_HIGH: - irq_mode = PDC_SYS_WAKE_INT_HIGH; - break; - case IRQ_TYPE_LEVEL_LOW: - irq_mode = PDC_SYS_WAKE_INT_LOW; - break; - default: - return -EINVAL; - } - - raw_spin_lock(&priv->lock); - - /* set the IRQ mode */ - soc_sys_wake_regoff = PDC_SYS_WAKE_BASE + syswake*PDC_SYS_WAKE_STRIDE; - soc_sys_wake = pdc_read(priv, soc_sys_wake_regoff); - soc_sys_wake &= ~PDC_SYS_WAKE_INT_MODE; - soc_sys_wake |= irq_mode << PDC_SYS_WAKE_INT_MODE_SHIFT; - pdc_write(priv, soc_sys_wake_regoff, soc_sys_wake); - - /* and update the handler */ - irq_setup_alt_chip(data, flow_type); - - raw_spin_unlock(&priv->lock); - - return 0; -} - -/* applies to both peripheral and syswake interrupts */ -static int pdc_irq_set_wake(struct irq_data *data, unsigned int on) -{ - struct pdc_intc_priv *priv = irqd_to_priv(data); - irq_hw_number_t hw = data->hwirq; - unsigned int mask = (1 << 16) << hw; - unsigned int dst_irq; - - raw_spin_lock(&priv->lock); - if (on) - priv->irq_route |= mask; - else - priv->irq_route &= ~mask; - pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route); - raw_spin_unlock(&priv->lock); - - /* control the destination IRQ wakeup too for standby mode */ - if (hwirq_is_syswake(hw)) - dst_irq = priv->syswake_irq; - else - dst_irq = priv->perip_irqs[hw]; - irq_set_irq_wake(dst_irq, on); - - return 0; -} - -static void pdc_intc_perip_isr(struct irq_desc *desc) -{ - unsigned int irq = irq_desc_get_irq(desc); - struct pdc_intc_priv *priv; - unsigned int i; - - priv = (struct pdc_intc_priv *)irq_desc_get_handler_data(desc); - - /* find the peripheral number */ - for (i = 0; i < priv->nr_perips; ++i) - if (irq == priv->perip_irqs[i]) - goto found; - - /* should never get here */ - return; -found: - - /* pass on the interrupt */ - generic_handle_domain_irq(priv->domain, i); -} - -static void pdc_intc_syswake_isr(struct irq_desc *desc) -{ - struct pdc_intc_priv *priv; - unsigned int syswake; - unsigned int status; - - priv = (struct pdc_intc_priv *)irq_desc_get_handler_data(desc); - - status = pdc_read(priv, PDC_IRQ_STATUS) & - pdc_read(priv, PDC_IRQ_ENABLE); - status &= (1 << priv->nr_syswakes) - 1; - - for (syswake = 0; status; status >>= 1, ++syswake) { - /* Has this sys_wake triggered? */ - if (!(status & 1)) - continue; - - generic_handle_domain_irq(priv->domain, syswake_to_hwirq(syswake)); - } -} - -static void pdc_intc_setup(struct pdc_intc_priv *priv) -{ - int i; - unsigned int soc_sys_wake_regoff; - unsigned int soc_sys_wake; - - /* - * Mask all syswake interrupts before routing, or we could receive an - * interrupt before we're ready to handle it. - */ - pdc_write(priv, PDC_IRQ_ENABLE, 0); - - /* - * Enable routing of all syswakes - * Disable all wake sources - */ - priv->irq_route = ((PDC_IRQ_ROUTE_EXT_EN_SYS0 << priv->nr_syswakes) - - PDC_IRQ_ROUTE_EXT_EN_SYS0); - pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route); - - /* Initialise syswake IRQ */ - for (i = 0; i < priv->nr_syswakes; ++i) { - /* set the IRQ mode to none */ - soc_sys_wake_regoff = PDC_SYS_WAKE_BASE + i*PDC_SYS_WAKE_STRIDE; - soc_sys_wake = PDC_SYS_WAKE_INT_NONE - << PDC_SYS_WAKE_INT_MODE_SHIFT; - pdc_write(priv, soc_sys_wake_regoff, soc_sys_wake); - } -} - -static int pdc_intc_probe(struct platform_device *pdev) -{ - struct pdc_intc_priv *priv; - struct device_node *node = pdev->dev.of_node; - struct resource *res_regs; - struct irq_chip_generic *gc; - unsigned int i; - int irq, ret; - u32 val; - - if (!node) - return -ENOENT; - - /* Get registers */ - res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res_regs == NULL) { - dev_err(&pdev->dev, "cannot find registers resource\n"); - return -ENOENT; - } - - /* Allocate driver data */ - priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - raw_spin_lock_init(&priv->lock); - platform_set_drvdata(pdev, priv); - - /* Ioremap the registers */ - priv->pdc_base = devm_ioremap(&pdev->dev, res_regs->start, - resource_size(res_regs)); - if (!priv->pdc_base) - return -EIO; - - /* Get number of peripherals */ - ret = of_property_read_u32(node, "num-perips", &val); - if (ret) { - dev_err(&pdev->dev, "No num-perips node property found\n"); - return -EINVAL; - } - if (val > SYS0_HWIRQ) { - dev_err(&pdev->dev, "num-perips (%u) out of range\n", val); - return -EINVAL; - } - priv->nr_perips = val; - - /* Get number of syswakes */ - ret = of_property_read_u32(node, "num-syswakes", &val); - if (ret) { - dev_err(&pdev->dev, "No num-syswakes node property found\n"); - return -EINVAL; - } - if (val > SYS0_HWIRQ) { - dev_err(&pdev->dev, "num-syswakes (%u) out of range\n", val); - return -EINVAL; - } - priv->nr_syswakes = val; - - /* Get peripheral IRQ numbers */ - priv->perip_irqs = devm_kcalloc(&pdev->dev, 4, priv->nr_perips, - GFP_KERNEL); - if (!priv->perip_irqs) - return -ENOMEM; - for (i = 0; i < priv->nr_perips; ++i) { - irq = platform_get_irq(pdev, 1 + i); - if (irq < 0) - return irq; - priv->perip_irqs[i] = irq; - } - /* check if too many were provided */ - if (platform_get_irq(pdev, 1 + i) >= 0) { - dev_err(&pdev->dev, "surplus perip IRQs detected\n"); - return -EINVAL; - } - - /* Get syswake IRQ number */ - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return irq; - priv->syswake_irq = irq; - - /* Set up an IRQ domain */ - priv->domain = irq_domain_create_linear(dev_fwnode(&pdev->dev), 16, &irq_generic_chip_ops, - priv); - if (unlikely(!priv->domain)) { - dev_err(&pdev->dev, "cannot add IRQ domain\n"); - return -ENOMEM; - } - priv->domain->flags |= IRQ_DOMAIN_FLAG_DESTROY_GC; - - /* - * Set up 2 generic irq chips with 2 chip types. - * The first one for peripheral irqs (only 1 chip type used) - * The second one for syswake irqs (edge and level chip types) - */ - ret = irq_alloc_domain_generic_chips(priv->domain, 8, 2, "pdc", - handle_level_irq, 0, 0, - IRQ_GC_INIT_NESTED_LOCK); - if (ret) - goto err_generic; - - /* peripheral interrupt chip */ - - gc = irq_get_domain_generic_chip(priv->domain, 0); - gc->unused = ~(BIT(priv->nr_perips) - 1); - gc->reg_base = priv->pdc_base; - /* - * IRQ_ROUTE contains wake bits, so we can't use the generic versions as - * they cache the mask - */ - gc->chip_types[0].regs.mask = PDC_IRQ_ROUTE; - gc->chip_types[0].chip.irq_mask = perip_irq_mask; - gc->chip_types[0].chip.irq_unmask = perip_irq_unmask; - gc->chip_types[0].chip.irq_set_wake = pdc_irq_set_wake; - - /* syswake interrupt chip */ - - gc = irq_get_domain_generic_chip(priv->domain, 8); - gc->unused = ~(BIT(priv->nr_syswakes) - 1); - gc->reg_base = priv->pdc_base; - - /* edge interrupts */ - gc->chip_types[0].type = IRQ_TYPE_EDGE_BOTH; - gc->chip_types[0].handler = handle_edge_irq; - gc->chip_types[0].regs.ack = PDC_IRQ_CLEAR; - gc->chip_types[0].regs.mask = PDC_IRQ_ENABLE; - gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit; - gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit; - gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit; - gc->chip_types[0].chip.irq_set_type = syswake_irq_set_type; - gc->chip_types[0].chip.irq_set_wake = pdc_irq_set_wake; - /* for standby we pass on to the shared syswake IRQ */ - gc->chip_types[0].chip.flags = IRQCHIP_MASK_ON_SUSPEND; - - /* level interrupts */ - gc->chip_types[1].type = IRQ_TYPE_LEVEL_MASK; - gc->chip_types[1].handler = handle_level_irq; - gc->chip_types[1].regs.ack = PDC_IRQ_CLEAR; - gc->chip_types[1].regs.mask = PDC_IRQ_ENABLE; - gc->chip_types[1].chip.irq_ack = irq_gc_ack_set_bit; - gc->chip_types[1].chip.irq_mask = irq_gc_mask_clr_bit; - gc->chip_types[1].chip.irq_unmask = irq_gc_mask_set_bit; - gc->chip_types[1].chip.irq_set_type = syswake_irq_set_type; - gc->chip_types[1].chip.irq_set_wake = pdc_irq_set_wake; - /* for standby we pass on to the shared syswake IRQ */ - gc->chip_types[1].chip.flags = IRQCHIP_MASK_ON_SUSPEND; - - /* Set up the hardware to enable interrupt routing */ - pdc_intc_setup(priv); - - /* Setup chained handlers for the peripheral IRQs */ - for (i = 0; i < priv->nr_perips; ++i) { - irq = priv->perip_irqs[i]; - irq_set_chained_handler_and_data(irq, pdc_intc_perip_isr, - priv); - } - - /* Setup chained handler for the syswake IRQ */ - irq_set_chained_handler_and_data(priv->syswake_irq, - pdc_intc_syswake_isr, priv); - - dev_info(&pdev->dev, - "PDC IRQ controller initialised (%u perip IRQs, %u syswake IRQs)\n", - priv->nr_perips, - priv->nr_syswakes); - - return 0; -err_generic: - irq_domain_remove(priv->domain); - return ret; -} - -static void pdc_intc_remove(struct platform_device *pdev) -{ - struct pdc_intc_priv *priv = platform_get_drvdata(pdev); - - for (unsigned int i = 0; i < priv->nr_perips; ++i) - irq_set_chained_handler_and_data(priv->perip_irqs[i], NULL, NULL); - - irq_set_chained_handler_and_data(priv->syswake_irq, NULL, NULL); - - irq_domain_remove(priv->domain); -} - -static const struct of_device_id pdc_intc_match[] = { - { .compatible = "img,pdc-intc" }, - {} -}; - -static struct platform_driver pdc_intc_driver = { - .driver = { - .name = "pdc-intc", - .of_match_table = pdc_intc_match, - }, - .probe = pdc_intc_probe, - .remove = pdc_intc_remove, -}; - -static int __init pdc_intc_init(void) -{ - return platform_driver_register(&pdc_intc_driver); -} -core_initcall(pdc_intc_init);