From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/mn10300/unit-asb2364/irq-fpga.c | 108 ++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 kernel/arch/mn10300/unit-asb2364/irq-fpga.c (limited to 'kernel/arch/mn10300/unit-asb2364/irq-fpga.c') diff --git a/kernel/arch/mn10300/unit-asb2364/irq-fpga.c b/kernel/arch/mn10300/unit-asb2364/irq-fpga.c new file mode 100644 index 000000000..073e2ccc4 --- /dev/null +++ b/kernel/arch/mn10300/unit-asb2364/irq-fpga.c @@ -0,0 +1,108 @@ +/* ASB2364 FPGA interrupt multiplexing + * + * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ + +#include +#include +#include +#include + +/* + * FPGA PIC operations + */ +static void asb2364_fpga_mask(struct irq_data *d) +{ + ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0001; + SyncExBus(); +} + +static void asb2364_fpga_ack(struct irq_data *d) +{ + ASB2364_FPGA_REG_IRQ(d->irq - NR_CPU_IRQS) = 0x0001; + SyncExBus(); +} + +static void asb2364_fpga_mask_ack(struct irq_data *d) +{ + ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0001; + SyncExBus(); + ASB2364_FPGA_REG_IRQ(d->irq - NR_CPU_IRQS) = 0x0001; + SyncExBus(); +} + +static void asb2364_fpga_unmask(struct irq_data *d) +{ + ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0000; + SyncExBus(); +} + +static struct irq_chip asb2364_fpga_pic = { + .name = "fpga", + .irq_ack = asb2364_fpga_ack, + .irq_mask = asb2364_fpga_mask, + .irq_mask_ack = asb2364_fpga_mask_ack, + .irq_unmask = asb2364_fpga_unmask, +}; + +/* + * FPGA PIC interrupt handler + */ +static irqreturn_t fpga_interrupt(int irq, void *_mask) +{ + if ((ASB2364_FPGA_REG_IRQ_LAN & 0x0001) != 0x0001) + generic_handle_irq(FPGA_LAN_IRQ); + if ((ASB2364_FPGA_REG_IRQ_UART & 0x0001) != 0x0001) + generic_handle_irq(FPGA_UART_IRQ); + if ((ASB2364_FPGA_REG_IRQ_I2C & 0x0001) != 0x0001) + generic_handle_irq(FPGA_I2C_IRQ); + if ((ASB2364_FPGA_REG_IRQ_USB & 0x0001) != 0x0001) + generic_handle_irq(FPGA_USB_IRQ); + if ((ASB2364_FPGA_REG_IRQ_FPGA & 0x0001) != 0x0001) + generic_handle_irq(FPGA_FPGA_IRQ); + + return IRQ_HANDLED; +} + +/* + * Define an interrupt action for each FPGA PIC output + */ +static struct irqaction fpga_irq[] = { + [0] = { + .handler = fpga_interrupt, + .flags = IRQF_SHARED, + .name = "fpga", + }, +}; + +/* + * Initialise the FPGA's PIC + */ +void __init irq_fpga_init(void) +{ + int irq; + + ASB2364_FPGA_REG_MASK_LAN = 0x0001; + SyncExBus(); + ASB2364_FPGA_REG_MASK_UART = 0x0001; + SyncExBus(); + ASB2364_FPGA_REG_MASK_I2C = 0x0001; + SyncExBus(); + ASB2364_FPGA_REG_MASK_USB = 0x0001; + SyncExBus(); + ASB2364_FPGA_REG_MASK_FPGA = 0x0001; + SyncExBus(); + + for (irq = NR_CPU_IRQS; irq < NR_IRQS; irq++) + irq_set_chip_and_handler(irq, &asb2364_fpga_pic, + handle_level_irq); + + /* the FPGA drives the XIRQ1 input on the CPU PIC */ + setup_irq(XIRQ1, &fpga_irq[0]); +} -- cgit 1.2.3-korg