diff options
Diffstat (limited to 'arch/arm/mach-s3c24xx/irq-s3c244x.c')
| -rw-r--r-- | arch/arm/mach-s3c24xx/irq-s3c244x.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/irq-s3c244x.c b/arch/arm/mach-s3c24xx/irq-s3c244x.c new file mode 100644 index 00000000000..5fe8e58d3af --- /dev/null +++ b/arch/arm/mach-s3c24xx/irq-s3c244x.c @@ -0,0 +1,142 @@ +/* linux/arch/arm/plat-s3c24xx/s3c244x-irq.c + * + * Copyright (c) 2003-2004 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * +*/ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/io.h> + +#include <mach/hardware.h> +#include <asm/irq.h> + +#include <asm/mach/irq.h> + +#include <mach/regs-irq.h> +#include <mach/regs-gpio.h> + +#include <plat/cpu.h> +#include <plat/pm.h> +#include <plat/irq.h> + +/* camera irq */ + +static void s3c_irq_demux_cam(unsigned int irq, + struct irq_desc *desc) +{ + unsigned int subsrc, submsk; + + /* read the current pending interrupts, and the mask + * for what it is available */ + + subsrc = __raw_readl(S3C2410_SUBSRCPND); + submsk = __raw_readl(S3C2410_INTSUBMSK); + + subsrc &= ~submsk; + subsrc >>= 11; + subsrc &= 3; + + if (subsrc != 0) { + if (subsrc & 1) { + generic_handle_irq(IRQ_S3C2440_CAM_C); + } + if (subsrc & 2) { + generic_handle_irq(IRQ_S3C2440_CAM_P); + } + } +} + +#define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0)) + +static void +s3c_irq_cam_mask(struct irq_data *data) +{ + s3c_irqsub_mask(data->irq, INTMSK_CAM, 3 << 11); +} + +static void +s3c_irq_cam_unmask(struct irq_data *data) +{ + s3c_irqsub_unmask(data->irq, INTMSK_CAM); +} + +static void +s3c_irq_cam_ack(struct irq_data *data) +{ + s3c_irqsub_maskack(data->irq, INTMSK_CAM, 3 << 11); +} + +static struct irq_chip s3c_irq_cam = { + .irq_mask = s3c_irq_cam_mask, + .irq_unmask = s3c_irq_cam_unmask, + .irq_ack = s3c_irq_cam_ack, +}; + +static int s3c244x_irq_add(struct device *dev, struct subsys_interface *sif) +{ + unsigned int irqno; + + irq_set_chip_and_handler(IRQ_NFCON, &s3c_irq_level_chip, + handle_level_irq); + set_irq_flags(IRQ_NFCON, IRQF_VALID); + + /* add chained handler for camera */ + + irq_set_chip_and_handler(IRQ_CAM, &s3c_irq_level_chip, + handle_level_irq); + irq_set_chained_handler(IRQ_CAM, s3c_irq_demux_cam); + + for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) { + irq_set_chip_and_handler(irqno, &s3c_irq_cam, + handle_level_irq); + set_irq_flags(irqno, IRQF_VALID); + } + + return 0; +} + +static struct subsys_interface s3c2440_irq_interface = { + .name = "s3c2440_irq", + .subsys = &s3c2440_subsys, + .add_dev = s3c244x_irq_add, +}; + +static int s3c2440_irq_init(void) +{ + return subsys_interface_register(&s3c2440_irq_interface); +} + +arch_initcall(s3c2440_irq_init); + +static struct subsys_interface s3c2442_irq_interface = { + .name = "s3c2442_irq", + .subsys = &s3c2442_subsys, + .add_dev = s3c244x_irq_add, +}; + + +static int s3c2442_irq_init(void) +{ + return subsys_interface_register(&s3c2442_irq_interface); +} + +arch_initcall(s3c2442_irq_init); |