Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030312AbcJQQxN (ORCPT ); Mon, 17 Oct 2016 12:53:13 -0400 Received: from mailapp02.imgtec.com ([217.156.133.132]:26407 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965224AbcJQQxH (ORCPT ); Mon, 17 Oct 2016 12:53:07 -0400 From: Zubair Lutfullah Kakakhel To: , , , , , , CC: , , , , , , , Subject: [Patch v5 01/12] microblaze: irqchip: Move intc driver to irqchip Date: Mon, 17 Oct 2016 17:52:45 +0100 Message-ID: <1476723176-39891-2-git-send-email-Zubair.Kakakhel@imgtec.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1476723176-39891-1-git-send-email-Zubair.Kakakhel@imgtec.com> References: <1476723176-39891-1-git-send-email-Zubair.Kakakhel@imgtec.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [192.168.154.45] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13806 Lines: 495 The Xilinx AXI Interrupt Controller IP block is used by the MIPS based xilfpga platform and a few PowerPC based platforms. Move the interrupt controller code out of arch/microblaze so that it can be used by everyone Signed-off-by: Zubair Lutfullah Kakakhel --- V4 -> V5 Rebase to v4.9-rc1 Renamed back to irq-xilinx-intc.c V3 -> V4 No change V2 -> V3 No change here. Cleanup patches follow after this patch. Its debatable to cleanup before/after move. Decided to place cleanup after move to put history in new place. V1 -> V2 Renamed irq-xilinx to irq-axi-intc Renamed CONFIG_XILINX_INTC to CONFIG_XILINX_AXI_INTC Patch is now without rename flag so as to facilitate review --- arch/microblaze/Kconfig | 1 + arch/microblaze/kernel/Makefile | 2 +- arch/microblaze/kernel/intc.c | 196 -------------------------------------- drivers/irqchip/Kconfig | 4 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-xilinx-intc.c | 196 ++++++++++++++++++++++++++++++++++++++ 6 files changed, 203 insertions(+), 197 deletions(-) delete mode 100644 arch/microblaze/kernel/intc.c create mode 100644 drivers/irqchip/irq-xilinx-intc.c diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 86f6572..85885a5 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -27,6 +27,7 @@ config MICROBLAZE select HAVE_MEMBLOCK_NODE_MAP select HAVE_OPROFILE select IRQ_DOMAIN + select XILINX_INTC select MODULES_USE_ELF_RELA select OF select OF_EARLY_FLATTREE diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index f08baca..e098381 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -15,7 +15,7 @@ endif extra-y := head.o vmlinux.lds obj-y += dma.o exceptions.o \ - hw_exception_handler.o intc.o irq.o \ + hw_exception_handler.o irq.o \ platform.o process.o prom.o ptrace.o \ reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c deleted file mode 100644 index 90bec7d..0000000 --- a/arch/microblaze/kernel/intc.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * Copyright (C) 2007-2013 Michal Simek - * Copyright (C) 2012-2013 Xilinx, Inc. - * Copyright (C) 2007-2009 PetaLogix - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include -#include -#include -#include -#include -#include - -static void __iomem *intc_baseaddr; - -/* No one else should require these constants, so define them locally here. */ -#define ISR 0x00 /* Interrupt Status Register */ -#define IPR 0x04 /* Interrupt Pending Register */ -#define IER 0x08 /* Interrupt Enable Register */ -#define IAR 0x0c /* Interrupt Acknowledge Register */ -#define SIE 0x10 /* Set Interrupt Enable bits */ -#define CIE 0x14 /* Clear Interrupt Enable bits */ -#define IVR 0x18 /* Interrupt Vector Register */ -#define MER 0x1c /* Master Enable Register */ - -#define MER_ME (1<<0) -#define MER_HIE (1<<1) - -static unsigned int (*read_fn)(void __iomem *); -static void (*write_fn)(u32, void __iomem *); - -static void intc_write32(u32 val, void __iomem *addr) -{ - iowrite32(val, addr); -} - -static unsigned int intc_read32(void __iomem *addr) -{ - return ioread32(addr); -} - -static void intc_write32_be(u32 val, void __iomem *addr) -{ - iowrite32be(val, addr); -} - -static unsigned int intc_read32_be(void __iomem *addr) -{ - return ioread32be(addr); -} - -static void intc_enable_or_unmask(struct irq_data *d) -{ - unsigned long mask = 1 << d->hwirq; - - pr_debug("enable_or_unmask: %ld\n", d->hwirq); - - /* ack level irqs because they can't be acked during - * ack function since the handle_level_irq function - * acks the irq before calling the interrupt handler - */ - if (irqd_is_level_type(d)) - write_fn(mask, intc_baseaddr + IAR); - - write_fn(mask, intc_baseaddr + SIE); -} - -static void intc_disable_or_mask(struct irq_data *d) -{ - pr_debug("disable: %ld\n", d->hwirq); - write_fn(1 << d->hwirq, intc_baseaddr + CIE); -} - -static void intc_ack(struct irq_data *d) -{ - pr_debug("ack: %ld\n", d->hwirq); - write_fn(1 << d->hwirq, intc_baseaddr + IAR); -} - -static void intc_mask_ack(struct irq_data *d) -{ - unsigned long mask = 1 << d->hwirq; - - pr_debug("disable_and_ack: %ld\n", d->hwirq); - write_fn(mask, intc_baseaddr + CIE); - write_fn(mask, intc_baseaddr + IAR); -} - -static struct irq_chip intc_dev = { - .name = "Xilinx INTC", - .irq_unmask = intc_enable_or_unmask, - .irq_mask = intc_disable_or_mask, - .irq_ack = intc_ack, - .irq_mask_ack = intc_mask_ack, -}; - -static struct irq_domain *root_domain; - -unsigned int get_irq(void) -{ - unsigned int hwirq, irq = -1; - - hwirq = read_fn(intc_baseaddr + IVR); - if (hwirq != -1U) - irq = irq_find_mapping(root_domain, hwirq); - - pr_debug("get_irq: hwirq=%d, irq=%d\n", hwirq, irq); - - return irq; -} - -static int xintc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) -{ - u32 intr_mask = (u32)d->host_data; - - if (intr_mask & (1 << hw)) { - irq_set_chip_and_handler_name(irq, &intc_dev, - handle_edge_irq, "edge"); - irq_clear_status_flags(irq, IRQ_LEVEL); - } else { - irq_set_chip_and_handler_name(irq, &intc_dev, - handle_level_irq, "level"); - irq_set_status_flags(irq, IRQ_LEVEL); - } - return 0; -} - -static const struct irq_domain_ops xintc_irq_domain_ops = { - .xlate = irq_domain_xlate_onetwocell, - .map = xintc_map, -}; - -static int __init xilinx_intc_of_init(struct device_node *intc, - struct device_node *parent) -{ - u32 nr_irq, intr_mask; - int ret; - - intc_baseaddr = of_iomap(intc, 0); - BUG_ON(!intc_baseaddr); - - ret = of_property_read_u32(intc, "xlnx,num-intr-inputs", &nr_irq); - if (ret < 0) { - pr_err("%s: unable to read xlnx,num-intr-inputs\n", __func__); - return ret; - } - - ret = of_property_read_u32(intc, "xlnx,kind-of-intr", &intr_mask); - if (ret < 0) { - pr_err("%s: unable to read xlnx,kind-of-intr\n", __func__); - return ret; - } - - if (intr_mask >> nr_irq) - pr_warn("%s: mismatch in kind-of-intr param\n", __func__); - - pr_info("%s: num_irq=%d, edge=0x%x\n", - intc->full_name, nr_irq, intr_mask); - - write_fn = intc_write32; - read_fn = intc_read32; - - /* - * Disable all external interrupts until they are - * explicity requested. - */ - write_fn(0, intc_baseaddr + IER); - - /* Acknowledge any pending interrupts just in case. */ - write_fn(0xffffffff, intc_baseaddr + IAR); - - /* Turn on the Master Enable. */ - write_fn(MER_HIE | MER_ME, intc_baseaddr + MER); - if (!(read_fn(intc_baseaddr + MER) & (MER_HIE | MER_ME))) { - write_fn = intc_write32_be; - read_fn = intc_read32_be; - write_fn(MER_HIE | MER_ME, intc_baseaddr + MER); - } - - /* Yeah, okay, casting the intr_mask to a void* is butt-ugly, but I'm - * lazy and Michal can clean it up to something nicer when he tests - * and commits this patch. ~~gcl */ - root_domain = irq_domain_add_linear(intc, nr_irq, &xintc_irq_domain_ops, - (void *)intr_mask); - - irq_set_default_host(root_domain); - - return 0; -} - -IRQCHIP_DECLARE(xilinx_intc, "xlnx,xps-intc-1.00.a", xilinx_intc_of_init); diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 82b0b5d..0842cbc 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -211,6 +211,10 @@ config XTENSA_MX bool select IRQ_DOMAIN +config XILINX_INTC + bool + select IRQ_DOMAIN + config IRQ_CROSSBAR bool help diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index e4dbfc8..0e55d94 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o obj-$(CONFIG_TS4800_IRQ) += irq-ts4800.o obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o +obj-$(CONFIG_XILINX_INTC) += irq-xilinx-intc.o obj-$(CONFIG_IRQ_CROSSBAR) += irq-crossbar.o obj-$(CONFIG_SOC_VF610) += irq-vf610-mscm-ir.o obj-$(CONFIG_BCM6345_L1_IRQ) += irq-bcm6345-l1.o diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c new file mode 100644 index 0000000..90bec7d --- /dev/null +++ b/drivers/irqchip/irq-xilinx-intc.c @@ -0,0 +1,196 @@ +/* + * Copyright (C) 2007-2013 Michal Simek + * Copyright (C) 2012-2013 Xilinx, Inc. + * Copyright (C) 2007-2009 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include +#include + +static void __iomem *intc_baseaddr; + +/* No one else should require these constants, so define them locally here. */ +#define ISR 0x00 /* Interrupt Status Register */ +#define IPR 0x04 /* Interrupt Pending Register */ +#define IER 0x08 /* Interrupt Enable Register */ +#define IAR 0x0c /* Interrupt Acknowledge Register */ +#define SIE 0x10 /* Set Interrupt Enable bits */ +#define CIE 0x14 /* Clear Interrupt Enable bits */ +#define IVR 0x18 /* Interrupt Vector Register */ +#define MER 0x1c /* Master Enable Register */ + +#define MER_ME (1<<0) +#define MER_HIE (1<<1) + +static unsigned int (*read_fn)(void __iomem *); +static void (*write_fn)(u32, void __iomem *); + +static void intc_write32(u32 val, void __iomem *addr) +{ + iowrite32(val, addr); +} + +static unsigned int intc_read32(void __iomem *addr) +{ + return ioread32(addr); +} + +static void intc_write32_be(u32 val, void __iomem *addr) +{ + iowrite32be(val, addr); +} + +static unsigned int intc_read32_be(void __iomem *addr) +{ + return ioread32be(addr); +} + +static void intc_enable_or_unmask(struct irq_data *d) +{ + unsigned long mask = 1 << d->hwirq; + + pr_debug("enable_or_unmask: %ld\n", d->hwirq); + + /* ack level irqs because they can't be acked during + * ack function since the handle_level_irq function + * acks the irq before calling the interrupt handler + */ + if (irqd_is_level_type(d)) + write_fn(mask, intc_baseaddr + IAR); + + write_fn(mask, intc_baseaddr + SIE); +} + +static void intc_disable_or_mask(struct irq_data *d) +{ + pr_debug("disable: %ld\n", d->hwirq); + write_fn(1 << d->hwirq, intc_baseaddr + CIE); +} + +static void intc_ack(struct irq_data *d) +{ + pr_debug("ack: %ld\n", d->hwirq); + write_fn(1 << d->hwirq, intc_baseaddr + IAR); +} + +static void intc_mask_ack(struct irq_data *d) +{ + unsigned long mask = 1 << d->hwirq; + + pr_debug("disable_and_ack: %ld\n", d->hwirq); + write_fn(mask, intc_baseaddr + CIE); + write_fn(mask, intc_baseaddr + IAR); +} + +static struct irq_chip intc_dev = { + .name = "Xilinx INTC", + .irq_unmask = intc_enable_or_unmask, + .irq_mask = intc_disable_or_mask, + .irq_ack = intc_ack, + .irq_mask_ack = intc_mask_ack, +}; + +static struct irq_domain *root_domain; + +unsigned int get_irq(void) +{ + unsigned int hwirq, irq = -1; + + hwirq = read_fn(intc_baseaddr + IVR); + if (hwirq != -1U) + irq = irq_find_mapping(root_domain, hwirq); + + pr_debug("get_irq: hwirq=%d, irq=%d\n", hwirq, irq); + + return irq; +} + +static int xintc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) +{ + u32 intr_mask = (u32)d->host_data; + + if (intr_mask & (1 << hw)) { + irq_set_chip_and_handler_name(irq, &intc_dev, + handle_edge_irq, "edge"); + irq_clear_status_flags(irq, IRQ_LEVEL); + } else { + irq_set_chip_and_handler_name(irq, &intc_dev, + handle_level_irq, "level"); + irq_set_status_flags(irq, IRQ_LEVEL); + } + return 0; +} + +static const struct irq_domain_ops xintc_irq_domain_ops = { + .xlate = irq_domain_xlate_onetwocell, + .map = xintc_map, +}; + +static int __init xilinx_intc_of_init(struct device_node *intc, + struct device_node *parent) +{ + u32 nr_irq, intr_mask; + int ret; + + intc_baseaddr = of_iomap(intc, 0); + BUG_ON(!intc_baseaddr); + + ret = of_property_read_u32(intc, "xlnx,num-intr-inputs", &nr_irq); + if (ret < 0) { + pr_err("%s: unable to read xlnx,num-intr-inputs\n", __func__); + return ret; + } + + ret = of_property_read_u32(intc, "xlnx,kind-of-intr", &intr_mask); + if (ret < 0) { + pr_err("%s: unable to read xlnx,kind-of-intr\n", __func__); + return ret; + } + + if (intr_mask >> nr_irq) + pr_warn("%s: mismatch in kind-of-intr param\n", __func__); + + pr_info("%s: num_irq=%d, edge=0x%x\n", + intc->full_name, nr_irq, intr_mask); + + write_fn = intc_write32; + read_fn = intc_read32; + + /* + * Disable all external interrupts until they are + * explicity requested. + */ + write_fn(0, intc_baseaddr + IER); + + /* Acknowledge any pending interrupts just in case. */ + write_fn(0xffffffff, intc_baseaddr + IAR); + + /* Turn on the Master Enable. */ + write_fn(MER_HIE | MER_ME, intc_baseaddr + MER); + if (!(read_fn(intc_baseaddr + MER) & (MER_HIE | MER_ME))) { + write_fn = intc_write32_be; + read_fn = intc_read32_be; + write_fn(MER_HIE | MER_ME, intc_baseaddr + MER); + } + + /* Yeah, okay, casting the intr_mask to a void* is butt-ugly, but I'm + * lazy and Michal can clean it up to something nicer when he tests + * and commits this patch. ~~gcl */ + root_domain = irq_domain_add_linear(intc, nr_irq, &xintc_irq_domain_ops, + (void *)intr_mask); + + irq_set_default_host(root_domain); + + return 0; +} + +IRQCHIP_DECLARE(xilinx_intc, "xlnx,xps-intc-1.00.a", xilinx_intc_of_init); -- 1.9.1