| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiaxun Yang | 1220 | 60.13% | 4 | 19.05% |
| Huacai Chen | 639 | 31.49% | 9 | 42.86% |
| Qing Zhang | 122 | 6.01% | 2 | 9.52% |
| Jianmin Lv | 22 | 1.08% | 2 | 9.52% |
| Liu Peibao | 14 | 0.69% | 1 | 4.76% |
| yinbo.zhu | 8 | 0.39% | 1 | 4.76% |
| Marc Zyngier | 4 | 0.20% | 2 | 9.52% |
| Total | 2029 | 21 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2020, Jiaxun Yang <jiaxun.yang@flygoat.com> * Loongson Local IO Interrupt Controller support */ #include <linux/errno.h> #include <linux/init.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/irqchip.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/io.h> #include <linux/smp.h> #include <linux/irqchip/chained_irq.h> #ifdef CONFIG_MIPS #include <loongson.h> #else #include <asm/loongson.h> #endif #define LIOINTC_CHIP_IRQ 32 #define LIOINTC_NUM_PARENT 4 #define LIOINTC_NUM_CORES 4 #define LIOINTC_INTC_CHIP_START 0x20 #define LIOINTC_REG_INTC_STATUS(core) (LIOINTC_INTC_CHIP_START + 0x20 + (core) * 8) #define LIOINTC_REG_INTC_EN_STATUS (LIOINTC_INTC_CHIP_START + 0x04) #define LIOINTC_REG_INTC_ENABLE (LIOINTC_INTC_CHIP_START + 0x08) #define LIOINTC_REG_INTC_DISABLE (LIOINTC_INTC_CHIP_START + 0x0c) /* * LIOINTC_REG_INTC_POL register is only valid for Loongson-2K series, and * Loongson-3 series behave as noops. */ #define LIOINTC_REG_INTC_POL (LIOINTC_INTC_CHIP_START + 0x10) #define LIOINTC_REG_INTC_EDGE (LIOINTC_INTC_CHIP_START + 0x14) #define LIOINTC_SHIFT_INTx 4 #define LIOINTC_ERRATA_IRQ 10 #if defined(CONFIG_MIPS) #define liointc_core_id get_ebase_cpunum() #else #define liointc_core_id get_csr_cpuid() #endif struct liointc_handler_data { struct liointc_priv *priv; u32 parent_int_map; }; struct liointc_priv { struct irq_chip_generic *gc; struct liointc_handler_data handler[LIOINTC_NUM_PARENT]; void __iomem *core_isr[LIOINTC_NUM_CORES]; u8 map_cache[LIOINTC_CHIP_IRQ]; u32 int_pol; u32 int_edge; bool has_lpc_irq_errata; }; struct fwnode_handle *liointc_handle; static void liointc_chained_handle_irq(struct irq_desc *desc) { struct liointc_handler_data *handler = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); struct irq_chip_generic *gc = handler->priv->gc; int core = liointc_core_id % LIOINTC_NUM_CORES; u32 pending; chained_irq_enter(chip, desc); pending = readl(handler->priv->core_isr[core]); if (!pending) { /* Always blame LPC IRQ if we have that bug */ if (handler->priv->has_lpc_irq_errata && (handler->parent_int_map & gc->mask_cache & BIT(LIOINTC_ERRATA_IRQ))) pending = BIT(LIOINTC_ERRATA_IRQ); else spurious_interrupt(); } while (pending) { int bit = __ffs(pending); generic_handle_domain_irq(gc->domain, bit); pending &= ~BIT(bit); } chained_irq_exit(chip, desc); } static void liointc_set_bit(struct irq_chip_generic *gc, unsigned int offset, u32 mask, bool set) { if (set) writel(readl(gc->reg_base + offset) | mask, gc->reg_base + offset); else writel(readl(gc->reg_base + offset) & ~mask, gc->reg_base + offset); } static int liointc_set_type(struct irq_data *data, unsigned int type) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); u32 mask = data->mask; unsigned long flags; irq_gc_lock_irqsave(gc, flags); switch (type) { case IRQ_TYPE_LEVEL_HIGH: liointc_set_bit(gc, LIOINTC_REG_INTC_EDGE, mask, false); liointc_set_bit(gc, LIOINTC_REG_INTC_POL, mask, false); break; case IRQ_TYPE_LEVEL_LOW: liointc_set_bit(gc, LIOINTC_REG_INTC_EDGE, mask, false); liointc_set_bit(gc, LIOINTC_REG_INTC_POL, mask, true); break; case IRQ_TYPE_EDGE_RISING: liointc_set_bit(gc, LIOINTC_REG_INTC_EDGE, mask, true); liointc_set_bit(gc, LIOINTC_REG_INTC_POL, mask, false); break; case IRQ_TYPE_EDGE_FALLING: liointc_set_bit(gc, LIOINTC_REG_INTC_EDGE, mask, true); liointc_set_bit(gc, LIOINTC_REG_INTC_POL, mask, true); break; default: irq_gc_unlock_irqrestore(gc, flags); return -EINVAL; } irq_gc_unlock_irqrestore(gc, flags); irqd_set_trigger_type(data, type); return 0; } static void liointc_suspend(struct irq_chip_generic *gc) { struct liointc_priv *priv = gc->private; priv->int_pol = readl(gc->reg_base + LIOINTC_REG_INTC_POL); priv->int_edge = readl(gc->reg_base + LIOINTC_REG_INTC_EDGE); } static void liointc_resume(struct irq_chip_generic *gc) { struct liointc_priv *priv = gc->private; unsigned long flags; int i; irq_gc_lock_irqsave(gc, flags); /* Disable all at first */ writel(0xffffffff, gc->reg_base + LIOINTC_REG_INTC_DISABLE); /* Restore map cache */ for (i = 0; i < LIOINTC_CHIP_IRQ; i++) writeb(priv->map_cache[i], gc->reg_base + i); writel(priv->int_pol, gc->reg_base + LIOINTC_REG_INTC_POL); writel(priv->int_edge, gc->reg_base + LIOINTC_REG_INTC_EDGE); /* Restore mask cache */ writel(gc->mask_cache, gc->reg_base + LIOINTC_REG_INTC_ENABLE); irq_gc_unlock_irqrestore(gc, flags); } static int parent_irq[LIOINTC_NUM_PARENT]; static u32 parent_int_map[LIOINTC_NUM_PARENT]; static const char *const parent_names[] = {"int0", "int1", "int2", "int3"}; static const char *const core_reg_names[] = {"isr0", "isr1", "isr2", "isr3"}; static int liointc_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { if (WARN_ON(intsize < 1)) return -EINVAL; *out_hwirq = intspec[0] - GSI_MIN_CPU_IRQ; if (intsize > 1) *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; else *out_type = IRQ_TYPE_NONE; return 0; } static const struct irq_domain_ops acpi_irq_gc_ops = { .map = irq_map_generic_chip, .unmap = irq_unmap_generic_chip, .xlate = liointc_domain_xlate, }; static int liointc_init(phys_addr_t addr, unsigned long size, int revision, struct fwnode_handle *domain_handle, struct device_node *node) { int i, err; void __iomem *base; struct irq_chip_type *ct; struct irq_chip_generic *gc; struct irq_domain *domain; struct liointc_priv *priv; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; base = ioremap(addr, size); if (!base) goto out_free_priv; for (i = 0; i < LIOINTC_NUM_CORES; i++) priv->core_isr[i] = base + LIOINTC_REG_INTC_STATUS(i); for (i = 0; i < LIOINTC_NUM_PARENT; i++) priv->handler[i].parent_int_map = parent_int_map[i]; if (revision > 1) { for (i = 0; i < LIOINTC_NUM_CORES; i++) { int index = of_property_match_string(node, "reg-names", core_reg_names[i]); if (index < 0) continue; priv->core_isr[i] = of_iomap(node, index); } if (!priv->core_isr[0]) goto out_iounmap; } /* Setup IRQ domain */ if (!acpi_disabled) domain = irq_domain_create_linear(domain_handle, LIOINTC_CHIP_IRQ, &acpi_irq_gc_ops, priv); else domain = irq_domain_create_linear(domain_handle, LIOINTC_CHIP_IRQ, &irq_generic_chip_ops, priv); if (!domain) { pr_err("loongson-liointc: cannot add IRQ domain\n"); goto out_iounmap; } err = irq_alloc_domain_generic_chips(domain, LIOINTC_CHIP_IRQ, 1, (node ? node->full_name : "LIOINTC"), handle_level_irq, 0, IRQ_NOPROBE, 0); if (err) { pr_err("loongson-liointc: unable to register IRQ domain\n"); goto out_free_domain; } /* Disable all IRQs */ writel(0xffffffff, base + LIOINTC_REG_INTC_DISABLE); /* Set to level triggered */ writel(0x0, base + LIOINTC_REG_INTC_EDGE); /* Generate parent INT part of map cache */ for (i = 0; i < LIOINTC_NUM_PARENT; i++) { u32 pending = priv->handler[i].parent_int_map; while (pending) { int bit = __ffs(pending); priv->map_cache[bit] = BIT(i) << LIOINTC_SHIFT_INTx; pending &= ~BIT(bit); } } for (i = 0; i < LIOINTC_CHIP_IRQ; i++) { /* Generate core part of map cache */ priv->map_cache[i] |= BIT(loongson_sysconf.boot_cpu_id); writeb(priv->map_cache[i], base + i); } gc = irq_get_domain_generic_chip(domain, 0); gc->private = priv; gc->reg_base = base; gc->domain = domain; gc->suspend = liointc_suspend; gc->resume = liointc_resume; ct = gc->chip_types; ct->regs.enable = LIOINTC_REG_INTC_ENABLE; ct->regs.disable = LIOINTC_REG_INTC_DISABLE; ct->chip.irq_unmask = irq_gc_unmask_enable_reg; ct->chip.irq_mask = irq_gc_mask_disable_reg; ct->chip.irq_mask_ack = irq_gc_mask_disable_reg; ct->chip.irq_set_type = liointc_set_type; ct->chip.flags = IRQCHIP_SKIP_SET_WAKE; gc->mask_cache = 0; priv->gc = gc; for (i = 0; i < LIOINTC_NUM_PARENT; i++) { if (parent_irq[i] <= 0) continue; priv->handler[i].priv = priv; irq_set_chained_handler_and_data(parent_irq[i], liointc_chained_handle_irq, &priv->handler[i]); } liointc_handle = domain_handle; return 0; out_free_domain: irq_domain_remove(domain); out_iounmap: iounmap(base); out_free_priv: kfree(priv); return -EINVAL; } #ifdef CONFIG_OF static int __init liointc_of_init(struct device_node *node, struct device_node *parent) { bool have_parent = FALSE; int sz, i, index, revision, err = 0; struct resource res; if (!of_device_is_compatible(node, "loongson,liointc-2.0")) { index = 0; revision = 1; } else { index = of_property_match_string(node, "reg-names", "main"); revision = 2; } if (of_address_to_resource(node, index, &res)) return -EINVAL; for (i = 0; i < LIOINTC_NUM_PARENT; i++) { parent_irq[i] = of_irq_get_byname(node, parent_names[i]); if (parent_irq[i] > 0) have_parent = TRUE; } if (!have_parent) return -ENODEV; sz = of_property_read_variable_u32_array(node, "loongson,parent_int_map", &parent_int_map[0], LIOINTC_NUM_PARENT, LIOINTC_NUM_PARENT); if (sz < 4) { pr_err("loongson-liointc: No parent_int_map\n"); return -ENODEV; } err = liointc_init(res.start, resource_size(&res), revision, of_node_to_fwnode(node), node); if (err < 0) return err; return 0; } IRQCHIP_DECLARE(loongson_liointc_1_0, "loongson,liointc-1.0", liointc_of_init); IRQCHIP_DECLARE(loongson_liointc_1_0a, "loongson,liointc-1.0a", liointc_of_init); IRQCHIP_DECLARE(loongson_liointc_2_0, "loongson,liointc-2.0", liointc_of_init); #endif #ifdef CONFIG_ACPI static int __init htintc_parse_madt(union acpi_subtable_headers *header, const unsigned long end) { struct acpi_madt_ht_pic *htintc_entry = (struct acpi_madt_ht_pic *)header; struct irq_domain *parent = irq_find_matching_fwnode(liointc_handle, DOMAIN_BUS_ANY); return htvec_acpi_init(parent, htintc_entry); } static int __init acpi_cascade_irqdomain_init(void) { int r; r = acpi_table_parse_madt(ACPI_MADT_TYPE_HT_PIC, htintc_parse_madt, 0); if (r < 0) return r; return 0; } int __init liointc_acpi_init(struct irq_domain *parent, struct acpi_madt_lio_pic *acpi_liointc) { int ret; struct fwnode_handle *domain_handle; parent_int_map[0] = acpi_liointc->cascade_map[0]; parent_int_map[1] = acpi_liointc->cascade_map[1]; parent_irq[0] = irq_create_mapping(parent, acpi_liointc->cascade[0]); parent_irq[1] = irq_create_mapping(parent, acpi_liointc->cascade[1]); domain_handle = irq_domain_alloc_fwnode(&acpi_liointc->address); if (!domain_handle) { pr_err("Unable to allocate domain handle\n"); return -ENOMEM; } ret = liointc_init(acpi_liointc->address, acpi_liointc->size, 1, domain_handle, NULL); if (ret == 0) ret = acpi_cascade_irqdomain_init(); else irq_domain_free_fwnode(domain_handle); return ret; } #endif
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