diff options
Diffstat (limited to 'arch/arm/mach-s3c2410/bast-irq.c')
| -rw-r--r-- | arch/arm/mach-s3c2410/bast-irq.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/arch/arm/mach-s3c2410/bast-irq.c b/arch/arm/mach-s3c2410/bast-irq.c deleted file mode 100644 index ac7b2ad5c405..000000000000 --- a/arch/arm/mach-s3c2410/bast-irq.c +++ /dev/null @@ -1,166 +0,0 @@ -/* linux/arch/arm/mach-s3c2410/bast-irq.c - * - * Copyright 2003-2005 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * - * http://www.simtec.co.uk/products/EB2410ITX/ - * - * 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/ioport.h> -#include <linux/device.h> -#include <linux/io.h> - -#include <asm/mach-types.h> - -#include <mach/hardware.h> -#include <asm/irq.h> - -#include <asm/mach/irq.h> - -#include <mach/regs-irq.h> -#include <mach/bast-map.h> -#include <mach/bast-irq.h> - -#include <plat/irq.h> - -#if 0 -#include <asm/debug-ll.h> -#endif - -#define irqdbf(x...) -#define irqdbf2(x...) - - -/* handle PC104 ISA interrupts from the system CPLD */ - -/* table of ISA irq nos to the relevant mask... zero means - * the irq is not implemented -*/ -static unsigned char bast_pc104_irqmasks[] = { - 0, /* 0 */ - 0, /* 1 */ - 0, /* 2 */ - 1, /* 3 */ - 0, /* 4 */ - 2, /* 5 */ - 0, /* 6 */ - 4, /* 7 */ - 0, /* 8 */ - 0, /* 9 */ - 8, /* 10 */ - 0, /* 11 */ - 0, /* 12 */ - 0, /* 13 */ - 0, /* 14 */ - 0, /* 15 */ -}; - -static unsigned char bast_pc104_irqs[] = { 3, 5, 7, 10 }; - -static void -bast_pc104_mask(struct irq_data *data) -{ - unsigned long temp; - - temp = __raw_readb(BAST_VA_PC104_IRQMASK); - temp &= ~bast_pc104_irqmasks[data->irq]; - __raw_writeb(temp, BAST_VA_PC104_IRQMASK); -} - -static void -bast_pc104_maskack(struct irq_data *data) -{ - struct irq_desc *desc = irq_desc + IRQ_ISA; - - bast_pc104_mask(data); - desc->irq_data.chip->irq_ack(&desc->irq_data); -} - -static void -bast_pc104_unmask(struct irq_data *data) -{ - unsigned long temp; - - temp = __raw_readb(BAST_VA_PC104_IRQMASK); - temp |= bast_pc104_irqmasks[data->irq]; - __raw_writeb(temp, BAST_VA_PC104_IRQMASK); -} - -static struct irq_chip bast_pc104_chip = { - .irq_mask = bast_pc104_mask, - .irq_unmask = bast_pc104_unmask, - .irq_ack = bast_pc104_maskack -}; - -static void -bast_irq_pc104_demux(unsigned int irq, - struct irq_desc *desc) -{ - unsigned int stat; - unsigned int irqno; - int i; - - stat = __raw_readb(BAST_VA_PC104_IRQREQ) & 0xf; - - if (unlikely(stat == 0)) { - /* ack if we get an irq with nothing (ie, startup) */ - - desc = irq_desc + IRQ_ISA; - desc->irq_data.chip->irq_ack(&desc->irq_data); - } else { - /* handle the IRQ */ - - for (i = 0; stat != 0; i++, stat >>= 1) { - if (stat & 1) { - irqno = bast_pc104_irqs[i]; - generic_handle_irq(irqno); - } - } - } -} - -static __init int bast_irq_init(void) -{ - unsigned int i; - - if (machine_is_bast()) { - printk(KERN_INFO "BAST PC104 IRQ routing, Copyright 2005 Simtec Electronics\n"); - - /* zap all the IRQs */ - - __raw_writeb(0x0, BAST_VA_PC104_IRQMASK); - - irq_set_chained_handler(IRQ_ISA, bast_irq_pc104_demux); - - /* register our IRQs */ - - for (i = 0; i < 4; i++) { - unsigned int irqno = bast_pc104_irqs[i]; - - irq_set_chip_and_handler(irqno, &bast_pc104_chip, - handle_level_irq); - set_irq_flags(irqno, IRQF_VALID); - } - } - - return 0; -} - -arch_initcall(bast_irq_init); |