From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753119AbcF2ODE (ORCPT ); Wed, 29 Jun 2016 10:03:04 -0400 Received: from mail1.asahi-net.or.jp ([202.224.39.197]:60615 "EHLO mail1.asahi-net.or.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752609AbcF2NlR (ORCPT ); Wed, 29 Jun 2016 09:41:17 -0400 From: Yoshinori Sato To: devicetree@vger.kernel.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yoshinori Sato Subject: [PATCH v4 13/22] sh: irqchip: SH7751 IRQCHIP Driver Date: Wed, 29 Jun 2016 22:40:58 +0900 Message-Id: <1467207667-15768-14-git-send-email-ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1467207667-15768-1-git-send-email-ysato@users.sourceforge.jp> References: <1467207667-15768-1-git-send-email-ysato@users.sourceforge.jp> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes v4 - update example Signed-off-by: Yoshinori Sato Acked-by: Rob Herring --- .../interrupt-controller/renesas,sh7751-intc.txt | 25 ++++ arch/sh/Kconfig | 6 +- arch/sh/boards/Kconfig | 1 + drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-renesas-sh7751.c | 141 +++++++++++++++++++++ 6 files changed, 176 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.txt create mode 100644 drivers/irqchip/irq-renesas-sh7751.c diff --git a/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.txt new file mode 100644 index 0000000..2bc6f22f --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/renesas,sh7751-intc.txt @@ -0,0 +1,23 @@ +DT bindings for the SH7751 interrupt controller + +Required properties: + + - compatible: has to be "renesas,sh7751-intc". + + - reg: Base address and length of interrupt controller register + and extend register. + + - interrupt-controller: Identifies the node as an interrupt controller. + + - #interrupt-cells: has to be <2>: an interrupt index and flags, as defined + in interrupts.txt in this directory. + +Example +------- + + shintc: interrupt-controller@ffd00000 { + compatible = "renesas,sh7751-intc"; + #interrupt-cells = <2>; + interrupt-controller; + reg = <0xffd00000 14>, <0xfe080000 128>; + }; diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index d06cac1..fee4333 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -29,7 +29,7 @@ config SUPERH select ARCH_WANT_IPC_PARSE_VERSION select HAVE_SYSCALL_TRACEPOINTS select HAVE_REGS_AND_STACK_ACCESS_API - select MAY_HAVE_SPARSE_IRQ + select MAY_HAVE_SPARSE_IRQ if !SH_DEVICE_TREE select IRQ_FORCED_THREADING select RTC_LIB select GENERIC_ATOMIC64 @@ -69,7 +69,7 @@ config SUPERH32 select HAVE_MIXED_BREAKPOINTS_REGS select PERF_EVENTS select ARCH_HIBERNATION_POSSIBLE if MMU - select SPARSE_IRQ + select SPARSE_IRQ if !SH_DEVICE_TREE select HAVE_CC_STACKPROTECTOR config SUPERH64 @@ -863,7 +863,7 @@ config PCI depends on SYS_SUPPORTS_PCI select PCI_DOMAINS select GENERIC_PCI_IOMAP - select NO_GENERIC_PCI_IOPORT_MAP + select NO_GENERIC_PCI_IOPORT_MAP if !SH_DEVICE_TREE help Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig index cfde921..d33ae46 100644 --- a/arch/sh/boards/Kconfig +++ b/arch/sh/boards/Kconfig @@ -15,6 +15,7 @@ config SH_DEVICE_TREE select GENERIC_IOMAP select COMMON_CLK select SYS_SUPPORTS_PCI + select GENERIC_IRQ_CHIP help Select Board Described by Device Tree to build a kernel that does not hard-code any board-specific knowledge but instead uses diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index fa33c50..fd7f842 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -251,6 +251,11 @@ config LS_SCFG_MSI depends on PCI && PCI_MSI select PCI_MSI_IRQ_DOMAIN +config RENESAS_SH_INTC + def_bool y if SH_DEVICE_TREE + select IRQ_DOMAIN + select IRQ_DOMAIN_HIERARCHY + config PARTITION_PERCPU bool diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 38853a1..2ab5735 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -69,3 +69,4 @@ obj-$(CONFIG_PIC32_EVIC) += irq-pic32-evic.o obj-$(CONFIG_MVEBU_ODMI) += irq-mvebu-odmi.o obj-$(CONFIG_LS_SCFG_MSI) += irq-ls-scfg-msi.o obj-$(CONFIG_EZNPS_GIC) += irq-eznps.o +obj-$(CONFIG_RENESAS_SH_INTC) += irq-renesas-sh7751.o diff --git a/drivers/irqchip/irq-renesas-sh7751.c b/drivers/irqchip/irq-renesas-sh7751.c new file mode 100644 index 0000000..1710978 --- /dev/null +++ b/drivers/irqchip/irq-renesas-sh7751.c @@ -0,0 +1,141 @@ +/* + * SH7751 interrupt contoller driver + * + * Copyright 2016 Yoshinori Sato + */ + +#include +#include +#include +#include +#include +#include + +static struct sh7751_intc_regs { + void *icr; + void *ipr; + void *intpri00; + void *intreq00; + void *intmsk00; + void *intmskclr00; +} sh7751_regs; + +static const unsigned int ipr_table[] = { + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0 - 7 */ + 0x41, 0xff, 0xff, 0x40, 0xff, 0xff, 0xff, 0xff, /* 8 - 15 */ + 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x11, /* 16 - 23 */ + 0x11, 0x11, 0x11, 0x13, 0x12, 0x12, 0xff, 0xff, /* 24 - 31 */ + 0x30, 0x33, 0x32, 0x32, 0x32, 0x32, 0x32, 0x21, /* 32 - 39 */ + 0x21, 0x21, 0x21, 0x21, 0x32, 0x32, 0x32, 0x32, /* 40 - 47 */ + 0xff, 0xff, 0xff, 0x40, 0xff, 0xff, 0xff, 0xff, /* 48 - 55 */ + 0xff, 0xff, 0xff, 0x40, 0xff, 0xff, 0xff, 0xff, /* 56 - 63 */ +}; + +static const unsigned int pri_table[] = { + 0, 4, 4, 4, 4, 4, 4, 4, + 8, 32, 32, 32, 12, 32, 32, 32, +}; + +static void sh_disable_irq(struct irq_data *data) +{ + int pos; + unsigned int addr; + unsigned long pri; + int irq = data->irq; + struct sh7751_intc_regs *reg = data->chip_data; + + if (irq < 64) { + if (ipr_table[irq] != 0xff) { + addr = (ipr_table[irq] & 0xf0) >> 2; + pos = (ipr_table[irq] & 0x0f) << 4; + pri = ~(0x000f << pos); + pri &= __raw_readw(reg->ipr + addr); + __raw_writew(pri, reg->ipr + addr); + } + } else { + if (pri_table[irq - 64] < 32) { + pos = pri_table[irq - 64]; + pri = ~(0x000f << pos); + pri &= __raw_readw(reg->intpri00); + __raw_writew(pri, reg->intpri00); + } + } +} + +static void sh_enable_irq(struct irq_data *data) +{ + int pos; + unsigned int addr; + unsigned long pri; + int irq = data->irq; + struct sh7751_intc_regs *reg = data->chip_data; + + if (irq < 64) { + if (ipr_table[irq] != 0xff) { + addr = (ipr_table[irq] & 0xf0) >> 2; + pos = (ipr_table[irq] & 0x0f) * 4; + pri = ~(0x000f << pos); + pri &= __raw_readw(reg->ipr + addr); + pri |= 1 << pos; + __raw_writew(pri, reg->ipr + addr); + } + } else { + if (pri_table[irq - 64] < 32) { + pos = pri_table[irq - 64]; + pri = ~(0x000f << pos); + pri &= __raw_readw(reg->intpri00); + pri |= 1 << pos; + __raw_writew(pri, reg->intpri00); + } + } +} + +static struct irq_chip sh_irq_chip = { + .name = "SH-IPR", + .irq_unmask = sh_enable_irq, + .irq_mask = sh_disable_irq, +}; + +static __init int irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw_irq_num) +{ + irq_set_chip_and_handler(virq, &sh_irq_chip, handle_level_irq); + irq_get_irq_data(virq)->chip_data = h->host_data; + irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOPROBE); + + return 0; +} + +static struct irq_domain_ops irq_ops = { + .map = irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +static int __init sh_intc_7751_init(struct device_node *intc, + struct device_node *parent) +{ + struct irq_domain *domain; + void *intc_baseaddr; + void *intc_baseaddr2; + + intc_baseaddr = of_iomap(intc, 0); + intc_baseaddr2 = of_iomap(intc, 1); + if (!intc_baseaddr || !intc_baseaddr2) + panic("INTC regsiter not defined"); + + sh7751_regs.icr = intc_baseaddr; + sh7751_regs.ipr = intc_baseaddr + 4; + sh7751_regs.intpri00 = intc_baseaddr2; + sh7751_regs.intreq00 = intc_baseaddr2 + 0x20; + sh7751_regs.intmsk00 = intc_baseaddr2 + 0x40; + sh7751_regs.intmskclr00 = intc_baseaddr2 + 0x60; + + domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, &sh7751_regs); + if (!domain) + panic("%s: unable to create IRQ domain\n", intc->full_name); + + irq_set_default_host(domain); + return 0; +} + +IRQCHIP_DECLARE(sh_7751_intc, "renesas,sh7751-intc", sh_intc_7751_init); -- 2.7.0