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[209.132.180.67]) by mx.google.com with ESMTP id c12-v6si1061763plr.32.2018.09.12.07.55.15; Wed, 12 Sep 2018 07:55:38 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728556AbeILT73 (ORCPT + 99 others); Wed, 12 Sep 2018 15:59:29 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:37797 "EHLO smtp2200-217.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728491AbeILT72 (ORCPT ); Wed, 12 Sep 2018 15:59:28 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.07437672|-1;CH=blue;FP=13222124786583081082|1|1|11|0|-1|-1|-1;HT=e01e01542;MF=ren_guo@c-sky.com;NM=1;PH=DS;RN=15;RT=15;SR=0;TI=SMTPD_---.CpxPAVs_1536764013; Received: from localhost(mailfrom:ren_guo@c-sky.com fp:SMTPD_---.CpxPAVs_1536764013) by smtp.aliyun-inc.com(10.147.44.118); Wed, 12 Sep 2018 22:53:33 +0800 From: Guo Ren To: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, daniel.lezcano@linaro.org, jason@lakedaemon.net, arnd@arndb.de, devicetree@vger.kernel.org, andrea.parri@amarulasolutions.com, peterz@infradead.org Cc: c-sky_gcc_upstream@c-sky.com, gnu-csky@mentor.com, thomas.petazzoni@bootlin.com, wbx@uclibc-ng.org, ren_guo@c-sky.com, green.hu@gmail.com Subject: [PATCH V4 26/27] irqchip: add C-SKY irqchip drivers Date: Wed, 12 Sep 2018 22:52:08 +0800 Message-Id: <60808788fef80cc6c64064982e58a22ed4abd006.1536758961.git.ren_guo@c-sky.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <93e8b592e429c156ad4d4ca5d85ef48fd0ab8b70.1536758961.git.ren_guo@c-sky.com> References: <93e8b592e429c156ad4d4ca5d85ef48fd0ab8b70.1536758961.git.ren_guo@c-sky.com> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch add C-SKY two interrupt conrollers. - irq-csky-apb-intc is a simple SOC interrupt controller which is used in a lot of C-SKY SOC products. - irq-csky-mpintc is C-SKY smp system interrupt controller and it could support 16 soft irqs, 16 private irqs, and 992 irqs. Changelog: - change name with upstream feed-back. - remove CSKY_VECIRQ_LEGENCY. - change irq map, reserve soft_irq&private_irq space. - add License and Copyright - change to generic irq chip framework. - support set_affinity for irq balance in SMP - add INTC_IFR to clear irq-pending - use irq_domain_add_linear instead of leagcy. - add set_handle_irq(), ref from openrisc & arm. Signed-off-by: Guo Ren --- drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-csky-apb-intc.c | 243 ++++++++++++++++++++++++++++++++++++ drivers/irqchip/irq-csky-mpintc.c | 191 ++++++++++++++++++++++++++++ 3 files changed, 435 insertions(+) create mode 100644 drivers/irqchip/irq-csky-apb-intc.c create mode 100644 drivers/irqchip/irq-csky-mpintc.c diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 15f268f..4838546 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -87,3 +87,4 @@ obj-$(CONFIG_MESON_IRQ_GPIO) += irq-meson-gpio.o obj-$(CONFIG_GOLDFISH_PIC) += irq-goldfish-pic.o obj-$(CONFIG_NDS32) += irq-ativic32.o obj-$(CONFIG_QCOM_PDC) += qcom-pdc.o +obj-$(CONFIG_CSKY) += irq-csky-mpintc.o irq-csky-apb-intc.o diff --git a/drivers/irqchip/irq-csky-apb-intc.c b/drivers/irqchip/irq-csky-apb-intc.c new file mode 100644 index 0000000..2c869ab --- /dev/null +++ b/drivers/irqchip/irq-csky-apb-intc.c @@ -0,0 +1,243 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define INTC_IRQS 64 + +#define CK_INTC_ICR 0x00 +#define CK_INTC_PEN31_00 0x14 +#define CK_INTC_PEN63_32 0x2c +#define CK_INTC_NEN31_00 0x10 +#define CK_INTC_NEN63_32 0x28 +#define CK_INTC_IFR31_00 0x08 +#define CK_INTC_IFR63_32 0x20 +#define CK_INTC_SOURCE 0x40 +#define CK_INTC_DUAL_BASE 0x100 + +#define GX_INTC_PEN31_00 0x00 +#define GX_INTC_PEN63_32 0x04 +#define GX_INTC_NEN31_00 0x40 +#define GX_INTC_NEN63_32 0x44 +#define GX_INTC_NMASK31_00 0x50 +#define GX_INTC_NMASK63_32 0x54 +#define GX_INTC_SOURCE 0x60 + +static void __iomem *reg_base; +static struct irq_domain *root_domain; + +static int nr_irq = INTC_IRQS; + +static void __init ck_set_gc(void __iomem *reg_base, u32 mask_reg, u32 irq_base) +{ + struct irq_chip_generic *gc; + + gc = irq_get_domain_generic_chip(root_domain, irq_base); + gc->reg_base = reg_base; + gc->chip_types[0].regs.mask = mask_reg; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit; + gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit; +} + +static inline u32 build_channel_val(u32 idx, u32 magic) +{ + u32 res; + + /* + * Set the same index for each channel + */ + res = idx | (idx << 8) | (idx << 16) | (idx << 24); + + /* + * Set the channel magic number in descending order. + * The magic is 0x00010203 for ck-intc + * The magic is 0x03020100 for gx6605s-intc + */ + return res | magic; +} + +static inline void setup_irq_channel(u32 magic, void __iomem *reg_addr) +{ + u32 i; + + /* Setup 64 channel slots */ + for (i = 0; i < INTC_IRQS; i += 4) { + writel_relaxed(build_channel_val(i, magic), reg_addr + i); + } +} + +static int __init +ck_intc_init_comm(struct device_node *node, struct device_node *parent) +{ + int ret; + + if (parent) { + pr_err("C-SKY Intc not a root irq controller\n"); + return -EINVAL; + } + + reg_base = of_iomap(node, 0); + if (!reg_base) { + pr_err("C-SKY Intc unable to map: %p.\n", node); + return -EINVAL; + } + + root_domain = irq_domain_add_linear(node, nr_irq, &irq_generic_chip_ops, NULL); + if (!root_domain) { + pr_err("C-SKY Intc irq_domain_add failed.\n"); + return -ENOMEM; + } + + ret = irq_alloc_domain_generic_chips(root_domain, 32, 1, + "csky_intc", handle_level_irq, + IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, + 0, 0); + if (ret) { + pr_err("C-SKY Intc irq_alloc_gc failed.\n"); + return -ENOMEM; + } + + return 0; +} + +static inline int handle_irq_perbit(struct pt_regs *regs, u32 hwirq, u32 irq_base) +{ + u32 irq; + + if (hwirq == 0) return 0; + + while (hwirq) { + irq = __ffs(hwirq); + hwirq &= ~BIT(irq); + handle_domain_irq(root_domain, irq_base + irq, regs); + } + + return 1; +} + +/* gx6605s 64 irqs interrupt controller */ +static void gx_irq_handler(struct pt_regs *regs) +{ + int ret; + + do { + ret = handle_irq_perbit(regs ,readl_relaxed(reg_base + GX_INTC_PEN31_00), 0); + ret |= handle_irq_perbit(regs ,readl_relaxed(reg_base + GX_INTC_PEN63_32), 32); + } while(ret); +} + +static int __init +gx_intc_init(struct device_node *node, struct device_node *parent) +{ + int ret; + + ret = ck_intc_init_comm(node, parent); + if (ret) + return ret; + + /* Initial enable reg to disable all interrupts */ + writel_relaxed(0x0, reg_base + GX_INTC_NEN31_00); + writel_relaxed(0x0, reg_base + GX_INTC_NEN63_32); + + /* Initial mask reg with all unmasked, becasue we only use enalbe reg */ + writel_relaxed(0x0, reg_base + GX_INTC_NMASK31_00); + writel_relaxed(0x0, reg_base + GX_INTC_NMASK63_32); + + setup_irq_channel(0x03020100, reg_base + GX_INTC_SOURCE); + + ck_set_gc(reg_base, GX_INTC_NEN31_00, 0); + ck_set_gc(reg_base, GX_INTC_NEN63_32, 32); + + set_handle_irq(gx_irq_handler); + + return 0; +} +IRQCHIP_DECLARE(csky_gx6605s_intc, "csky,gx6605s-intc", gx_intc_init); + +/* C-SKY simple 64 irqs interrupt controller, dual-together could support 128 irqs */ +static void ck_irq_handler(struct pt_regs *regs) +{ + int ret; + + do { + /* handle 0 - 31 irqs */ + ret = handle_irq_perbit(regs, readl_relaxed(reg_base + CK_INTC_PEN31_00), 0); + ret |= handle_irq_perbit(regs, readl_relaxed(reg_base + CK_INTC_PEN63_32), 32); + + writel_relaxed(0, reg_base + CK_INTC_IFR31_00); + writel_relaxed(0, reg_base + CK_INTC_IFR63_32); + + if (nr_irq == INTC_IRQS) continue; + + /* handle 64 - 127 irqs */ + ret |= handle_irq_perbit(regs, + readl_relaxed(reg_base + CK_INTC_PEN31_00 + CK_INTC_DUAL_BASE), 64); + ret |= handle_irq_perbit(regs, + readl_relaxed(reg_base + CK_INTC_PEN63_32 + CK_INTC_DUAL_BASE), 96); + + writel_relaxed(0, reg_base + CK_INTC_IFR63_32 + CK_INTC_DUAL_BASE); + writel_relaxed(0, reg_base + CK_INTC_IFR31_00 + CK_INTC_DUAL_BASE); + } while(ret); +} + +static int __init +ck_intc_init(struct device_node *node, struct device_node *parent) +{ + int ret; + + ret = ck_intc_init_comm(node, parent); + if (ret) + return ret; + + /* Initial enable reg to disable all interrupts */ + writel_relaxed(0, reg_base + CK_INTC_NEN31_00); + writel_relaxed(0, reg_base + CK_INTC_NEN63_32); + + /* Enable irq intc */ + writel_relaxed(BIT(31), reg_base + CK_INTC_ICR); + + ck_set_gc(reg_base, CK_INTC_NEN31_00, 0); + ck_set_gc(reg_base, CK_INTC_NEN63_32, 32); + + setup_irq_channel(0x00010203, reg_base + CK_INTC_SOURCE); + + set_handle_irq(ck_irq_handler); + + return 0; +} +IRQCHIP_DECLARE(ck_intc, "csky,apb-intc", ck_intc_init); + +static int __init +ck_dual_intc_init(struct device_node *node, struct device_node *parent) +{ + int ret; + + /* dual-apb-intc up to 128 irq sources*/ + nr_irq = INTC_IRQS * 2; + + ret = ck_intc_init(node, parent); + if (ret) + return ret; + + /* Initial enable reg to disable all interrupts */ + writel_relaxed(0, reg_base + CK_INTC_NEN31_00 + CK_INTC_DUAL_BASE); + writel_relaxed(0, reg_base + CK_INTC_NEN63_32 + CK_INTC_DUAL_BASE); + + ck_set_gc(reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN31_00, 64); + ck_set_gc(reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN63_32, 96); + + setup_irq_channel(0x00010203, reg_base + CK_INTC_SOURCE + CK_INTC_DUAL_BASE); + + return 0; +} +IRQCHIP_DECLARE(ck_dual_intc, "csky,dual-apb-intc", ck_dual_intc_init); diff --git a/drivers/irqchip/irq-csky-mpintc.c b/drivers/irqchip/irq-csky-mpintc.c new file mode 100644 index 0000000..2b2f75c --- /dev/null +++ b/drivers/irqchip/irq-csky-mpintc.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void __iomem *INTCG_base; +static void __iomem *INTCL_base; + +#define COMM_IRQ_BASE 32 + +#define INTCG_SIZE 0x8000 +#define INTCL_SIZE 0x1000 +#define INTC_SIZE INTCL_SIZE*nr_cpu_ids + INTCG_SIZE + +#define INTCG_ICTLR 0x0 +#define INTCG_CICFGR 0x100 +#define INTCG_CIDSTR 0x1000 + +#define INTCL_PICTLR 0x0 +#define INTCL_SIGR 0x60 +#define INTCL_HPPIR 0x68 +#define INTCL_RDYIR 0x6c +#define INTCL_SENR 0xa0 +#define INTCL_CENR 0xa4 +#define INTCL_CACR 0xb4 + +#define INTC_IRQS 256 + +static DEFINE_PER_CPU(void __iomem *, intcl_reg); + +static void csky_mpintc_handler(struct pt_regs *regs) +{ + void __iomem *reg_base = this_cpu_read(intcl_reg); + + do { + handle_domain_irq(NULL, + readl_relaxed(reg_base + INTCL_RDYIR), + regs); + } while (readl_relaxed(reg_base + INTCL_HPPIR) & BIT(31)); +} + +static void csky_mpintc_enable(struct irq_data *d) +{ + void __iomem *reg_base = this_cpu_read(intcl_reg); + + writel_relaxed(d->hwirq, reg_base + INTCL_SENR); +} + +static void csky_mpintc_disable(struct irq_data *d) +{ + void __iomem *reg_base = this_cpu_read(intcl_reg); + + writel_relaxed(d->hwirq, reg_base + INTCL_CENR); +} + +static void csky_mpintc_eoi(struct irq_data *d) +{ + void __iomem *reg_base = this_cpu_read(intcl_reg); + + writel_relaxed(d->hwirq, reg_base + INTCL_CACR); +} + +#ifdef CONFIG_SMP +static int csky_irq_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, + bool force) +{ + unsigned int cpu; + unsigned int offset = 4 * (d->hwirq - COMM_IRQ_BASE); + + if (!force) + cpu = cpumask_any_and(mask_val, cpu_online_mask); + else + cpu = cpumask_first(mask_val); + + if (cpu >= nr_cpu_ids) + return -EINVAL; + + /* Enable interrupt destination */ + cpu |= BIT(31); + + writel_relaxed(cpu, INTCG_base + INTCG_CIDSTR + offset); + + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + return IRQ_SET_MASK_OK_DONE; +} +#endif + +static struct irq_chip csky_irq_chip = { + .name = "C-SKY SMP Intc V2", + .irq_eoi = csky_mpintc_eoi, + .irq_enable = csky_mpintc_enable, + .irq_disable = csky_mpintc_disable, +#ifdef CONFIG_SMP + .irq_set_affinity = csky_irq_set_affinity, +#endif +}; + +static int csky_irqdomain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + if(hwirq < COMM_IRQ_BASE) { + irq_set_percpu_devid(irq); + irq_set_chip_and_handler(irq, &csky_irq_chip, handle_percpu_irq); + } else { + irq_set_chip_and_handler(irq, &csky_irq_chip, handle_fasteoi_irq); + } + + return 0; +} + +static const struct irq_domain_ops csky_irqdomain_ops = { + .map = csky_irqdomain_map, + .xlate = irq_domain_xlate_onecell, +}; + +#ifdef CONFIG_SMP +static void csky_mpintc_send_ipi(const unsigned long *mask, unsigned long irq) +{ + void __iomem *reg_base = this_cpu_read(intcl_reg); + + /* + * INTCL_SIGR[3:0] INTID + * INTCL_SIGR[8:15] CPUMASK + */ + writel_relaxed((*mask) << 8 | irq, reg_base + INTCL_SIGR); +} +#endif + +/* C-SKY multi processor interrupt controller */ +static int __init +csky_mpintc_init(struct device_node *node, struct device_node *parent) +{ + struct irq_domain *root_domain; + unsigned int cpu, nr_irq; + int ret; + + if (parent) + return 0; + + ret = of_property_read_u32(node, "csky,num-irqs", &nr_irq); + if (ret < 0) { + nr_irq = INTC_IRQS; + } + + if (INTCG_base == NULL) { + INTCG_base = ioremap(mfcr("cr<31, 14>"), INTC_SIZE); + if (INTCG_base == NULL) + return -EIO; + + INTCL_base = INTCG_base + INTCG_SIZE; + + writel_relaxed(BIT(0), INTCG_base + INTCG_ICTLR); + } + + root_domain = irq_domain_add_linear(node, nr_irq, &csky_irqdomain_ops, + NULL); + if (!root_domain) + return -ENXIO; + + irq_set_default_host(root_domain); + + /* for every cpu */ + for_each_present_cpu(cpu) { + per_cpu(intcl_reg, cpu) = INTCL_base + (INTCL_SIZE * cpu); + writel_relaxed(BIT(0), per_cpu(intcl_reg, cpu) + INTCL_PICTLR); + } + + set_handle_irq(&csky_mpintc_handler); + +#ifdef CONFIG_SMP + set_send_ipi(&csky_mpintc_send_ipi); +#endif + + return 0; +} +IRQCHIP_DECLARE(csky_mpintc, "csky,mpintc", csky_mpintc_init); -- 2.7.4