diff options
Diffstat (limited to 'arch/arm/mach-s5p64x0/irq-eint.c')
| -rw-r--r-- | arch/arm/mach-s5p64x0/irq-eint.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/arch/arm/mach-s5p64x0/irq-eint.c b/arch/arm/mach-s5p64x0/irq-eint.c deleted file mode 100644 index 275dc74..0000000 --- a/arch/arm/mach-s5p64x0/irq-eint.c +++ /dev/null @@ -1,155 +0,0 @@ -/* arch/arm/mach-s5p64x0/irq-eint.c - * - * Copyright (c) 2011 Samsung Electronics Co., Ltd - * http://www.samsung.com/ - * - * Based on linux/arch/arm/mach-s3c64xx/irq-eint.c - * - * S5P64X0 - Interrupt handling for External Interrupts. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/gpio.h> -#include <linux/irq.h> -#include <linux/io.h> - -#include <plat/cpu.h> -#include <plat/regs-irqtype.h> -#include <plat/gpio-cfg.h> -#include <plat/pm.h> - -#include <mach/regs-gpio.h> -#include <mach/regs-clock.h> - -#define eint_offset(irq) ((irq) - IRQ_EINT(0)) - -static int s5p64x0_irq_eint_set_type(struct irq_data *data, unsigned int type) -{ - int offs = eint_offset(data->irq); - int shift; - u32 ctrl, mask; - u32 newvalue = 0; - - if (offs > 15) - return -EINVAL; - - switch (type) { - case IRQ_TYPE_NONE: - printk(KERN_WARNING "No edge setting!\n"); - break; - case IRQ_TYPE_EDGE_RISING: - newvalue = S3C2410_EXTINT_RISEEDGE; - break; - case IRQ_TYPE_EDGE_FALLING: - newvalue = S3C2410_EXTINT_FALLEDGE; - break; - case IRQ_TYPE_EDGE_BOTH: - newvalue = S3C2410_EXTINT_BOTHEDGE; - break; - case IRQ_TYPE_LEVEL_LOW: - newvalue = S3C2410_EXTINT_LOWLEV; - break; - case IRQ_TYPE_LEVEL_HIGH: - newvalue = S3C2410_EXTINT_HILEV; - break; - default: - printk(KERN_ERR "No such irq type %d", type); - return -EINVAL; - } - - shift = (offs / 2) * 4; - mask = 0x7 << shift; - - ctrl = __raw_readl(S5P64X0_EINT0CON0) & ~mask; - ctrl |= newvalue << shift; - __raw_writel(ctrl, S5P64X0_EINT0CON0); - - /* Configure the GPIO pin for 6450 or 6440 based on CPU ID */ - if (soc_is_s5p6450()) - s3c_gpio_cfgpin(S5P6450_GPN(offs), S3C_GPIO_SFN(2)); - else - s3c_gpio_cfgpin(S5P6440_GPN(offs), S3C_GPIO_SFN(2)); - - return 0; -} - -/* - * s5p64x0_irq_demux_eint - * - * This function demuxes the IRQ from the group0 external interrupts, - * from IRQ_EINT(0) to IRQ_EINT(15). It is designed to be inlined into - * the specific handlers s5p64x0_irq_demux_eintX_Y. - */ -static inline void s5p64x0_irq_demux_eint(unsigned int start, unsigned int end) -{ - u32 status = __raw_readl(S5P64X0_EINT0PEND); - u32 mask = __raw_readl(S5P64X0_EINT0MASK); - unsigned int irq; - - status &= ~mask; - status >>= start; - status &= (1 << (end - start + 1)) - 1; - - for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) { - if (status & 1) - generic_handle_irq(irq); - status >>= 1; - } -} - -static void s5p64x0_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc) -{ - s5p64x0_irq_demux_eint(0, 3); -} - -static void s5p64x0_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc) -{ - s5p64x0_irq_demux_eint(4, 11); -} - -static void s5p64x0_irq_demux_eint12_15(unsigned int irq, - struct irq_desc *desc) -{ - s5p64x0_irq_demux_eint(12, 15); -} - -static int s5p64x0_alloc_gc(void) -{ - struct irq_chip_generic *gc; - struct irq_chip_type *ct; - - gc = irq_alloc_generic_chip("s5p64x0-eint", 1, S5P_IRQ_EINT_BASE, - S5P_VA_GPIO, handle_level_irq); - if (!gc) { - printk(KERN_ERR "%s: irq_alloc_generic_chip for group 0" - "external interrupts failed\n", __func__); - return -EINVAL; - } - - ct = gc->chip_types; - ct->chip.irq_ack = irq_gc_ack_set_bit; - ct->chip.irq_mask = irq_gc_mask_set_bit; - ct->chip.irq_unmask = irq_gc_mask_clr_bit; - ct->chip.irq_set_type = s5p64x0_irq_eint_set_type; - ct->chip.irq_set_wake = s3c_irqext_wake; - ct->regs.ack = EINT0PEND_OFFSET; - ct->regs.mask = EINT0MASK_OFFSET; - irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE, - IRQ_NOREQUEST | IRQ_NOPROBE, 0); - return 0; -} - -static int __init s5p64x0_init_irq_eint(void) -{ - int ret = s5p64x0_alloc_gc(); - irq_set_chained_handler(IRQ_EINT0_3, s5p64x0_irq_demux_eint0_3); - irq_set_chained_handler(IRQ_EINT4_11, s5p64x0_irq_demux_eint4_11); - irq_set_chained_handler(IRQ_EINT12_15, s5p64x0_irq_demux_eint12_15); - - return ret; -} -arch_initcall(s5p64x0_init_irq_eint); |