On Mon, May 17, 2010 at 10:16:56AM +0900, Kukjin Kim wrote: > From: Jongpill Lee <boyko.lee@xxxxxxxxxxx> > > Add support for external interrupts on v210. > > Signed-off-by: Jongpill Lee <boyko.lee@xxxxxxxxxxx> > Signed-off-by: Pannaga Bhushan <p.bhushan@xxxxxxxxxxx> > Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx> > --- > arch/arm/mach-s5pv210/Kconfig | 1 + > arch/arm/mach-s5pv210/include/mach/irqs.h | 31 ++-- > arch/arm/mach-s5pv210/include/mach/regs-gpio.h | 46 +++++ > arch/arm/plat-s5p/Kconfig | 5 + > arch/arm/plat-s5p/Makefile | 1 + > arch/arm/plat-s5p/irq-eint.c | 216 ++++++++++++++++++++++++ > 6 files changed, 282 insertions(+), 18 deletions(-) > create mode 100644 arch/arm/mach-s5pv210/include/mach/regs-gpio.h > create mode 100644 arch/arm/plat-s5p/irq-eint.c > > diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig > index af33a1a..c4c2a7f 100644 > --- a/arch/arm/mach-s5pv210/Kconfig > +++ b/arch/arm/mach-s5pv210/Kconfig > @@ -12,6 +12,7 @@ if ARCH_S5PV210 > config CPU_S5PV210 > bool > select PLAT_S5P > + select S5P_EXT_INT > help > Enable S5PV210 CPU support > > diff --git a/arch/arm/mach-s5pv210/include/mach/irqs.h b/arch/arm/mach-s5pv210/include/mach/irqs.h > index 62c5175..42b9b28 100644 > --- a/arch/arm/mach-s5pv210/include/mach/irqs.h > +++ b/arch/arm/mach-s5pv210/include/mach/irqs.h > @@ -17,22 +17,9 @@ > > /* VIC0: System, DMA, Timer */ > > -#define IRQ_EINT0 S5P_IRQ_VIC0(0) > -#define IRQ_EINT1 S5P_IRQ_VIC0(1) > -#define IRQ_EINT2 S5P_IRQ_VIC0(2) > -#define IRQ_EINT3 S5P_IRQ_VIC0(3) > -#define IRQ_EINT4 S5P_IRQ_VIC0(4) > -#define IRQ_EINT5 S5P_IRQ_VIC0(5) > -#define IRQ_EINT6 S5P_IRQ_VIC0(6) > -#define IRQ_EINT7 S5P_IRQ_VIC0(7) > -#define IRQ_EINT8 S5P_IRQ_VIC0(8) > -#define IRQ_EINT9 S5P_IRQ_VIC0(9) > -#define IRQ_EINT10 S5P_IRQ_VIC0(10) > -#define IRQ_EINT11 S5P_IRQ_VIC0(11) > -#define IRQ_EINT12 S5P_IRQ_VIC0(12) > -#define IRQ_EINT13 S5P_IRQ_VIC0(13) > -#define IRQ_EINT14 S5P_IRQ_VIC0(14) > -#define IRQ_EINT15 S5P_IRQ_VIC0(15) > +/* Can be used for EINTs 0 to 15 */ > +#define IRQ_EINT(x) ((x) + S5P_IRQ_VIC0(0)) > + > #define IRQ_EINT16_31 S5P_IRQ_VIC0(16) > #define IRQ_BATF S5P_IRQ_VIC0(17) > #define IRQ_MDMA S5P_IRQ_VIC0(18) > @@ -137,10 +124,18 @@ > #define S5P_IRQ_EINT_BASE (IRQ_VIC_END + 1) > > #define S5P_EINT(x) ((x) + S5P_IRQ_EINT_BASE) > -#define IRQ_EINT(x) S5P_EINT(x) > +/* Can be used for EINTs 16 to 31 */ > +#define IRQ_EINT_GRP(x) S5P_EINT(x) > + > +#define EINT_MODE S3C_GPIO_SFN(0xf) > > /* Set the default NR_IRQS */ > > -#define NR_IRQS (IRQ_EINT(31) + 1) > +#define NR_IRQS (IRQ_EINT_GRP(31) + 1) > + > +#define EINT_GPIO_REG0(x) S5PV210_GPH0(x) > +#define EINT_GPIO_REG1(x) S5PV210_GPH1(x) > +#define EINT_GPIO_REG2(x) S5PV210_GPH2(x) > +#define EINT_GPIO_REG3(x) S5PV210_GPH3(x) > > #endif /* ASM_ARCH_IRQS_H */ > diff --git a/arch/arm/mach-s5pv210/include/mach/regs-gpio.h b/arch/arm/mach-s5pv210/include/mach/regs-gpio.h > new file mode 100644 > index 0000000..fe16292 > --- /dev/null > +++ b/arch/arm/mach-s5pv210/include/mach/regs-gpio.h > @@ -0,0 +1,46 @@ > +/* linux/arch/arm/mach-s5pv210/include/mach/regs-gpio.h > + * > + * Copyright (c) 2010 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * S5PV210 - GPIO (including EINT) register definitions > + * > + * 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. > +*/ > + > +#ifndef __ASM_ARCH_REGS_GPIO_H > +#define __ASM_ARCH_REGS_GPIO_H __FILE__ > + > +#include <mach/map.h> > + > +#define S5PV210_EINT30CON (S5P_VA_GPIO + 0xE00) > +#define S5P_EINT_CON(x) (S5PV210_EINT30CON + ((x) * 0x4)) > + > +#define S5PV210_EINT30FLTCON0 (S5P_VA_GPIO + 0xE80) > +#define S5P_EINT_FLTCON(x) (S5PV210_EINT30FLTCON0 + ((x) * 0x4)) > + > +#define S5PV210_EINT30MASK (S5P_VA_GPIO + 0xF00) > +#define S5P_EINT_MASK(x) (S5PV210_EINT30MASK + ((x) * 0x4)) > + > +#define S5PV210_EINT30PEND (S5P_VA_GPIO + 0xF40) > +#define S5P_EINT_PEND(x) (S5PV210_EINT30PEND + ((x) * 0x4)) > + > +#define eint_offset(irq) ((irq) < IRQ_EINT16_31 ? ((irq) - IRQ_EINT(0)) \ > + : ((irq) - S5P_IRQ_EINT_BASE)) > + should we sepreate out the EINT 0..15 cases to make the higher EINT code easier to process? > +#define eint_irq_to_bit(irq) (1 << (eint_offset(irq) & 0x7)) > + > +#define eint_conf_reg(irq) ((eint_offset(irq)) >> 3) > +#define eint_mask_reg(irq) ((eint_offset(irq)) >> 3) > +#define eint_pend_reg(irq) ((eint_offset(irq)) >> 3) > + > +/* values for S5P_EXTINT0 */ > +#define S5P_EXTINT_LOWLEV (0x00) > +#define S5P_EXTINT_HILEV (0x01) > +#define S5P_EXTINT_FALLEDGE (0x02) > +#define S5P_EXTINT_RISEEDGE (0x03) > +#define S5P_EXTINT_BOTHEDGE (0x04) > + > +#endif /* __ASM_ARCH_REGS_GPIO_H */ > diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig > index d400a6a..7d1fc40 100644 > --- a/arch/arm/plat-s5p/Kconfig > +++ b/arch/arm/plat-s5p/Kconfig > @@ -23,3 +23,8 @@ config PLAT_S5P > select SAMSUNG_IRQ_UART > help > Base platform code for Samsung's S5P series SoC. > + > +config S5P_EXT_INT > + bool > + help > + Use the external interrupts (other than GPIO interrupts.) > diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile > index a7c54b3..25941a5 100644 > --- a/arch/arm/plat-s5p/Makefile > +++ b/arch/arm/plat-s5p/Makefile > @@ -16,4 +16,5 @@ obj-y += dev-uart.o > obj-y += cpu.o > obj-y += clock.o > obj-y += irq.o > +obj-$(CONFIG_S5P_EXT_INT) += irq-eint.o > obj-y += setup-i2c0.o > diff --git a/arch/arm/plat-s5p/irq-eint.c b/arch/arm/plat-s5p/irq-eint.c > new file mode 100644 > index 0000000..484a8fe > --- /dev/null > +++ b/arch/arm/plat-s5p/irq-eint.c > @@ -0,0 +1,216 @@ > +/* linux/arch/arm/plat-s5p/irq-eint.c > + * > + * Copyright (c) 2010 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * S5P - IRQ EINT support > + * > + * 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/interrupt.h> > +#include <linux/irq.h> > +#include <linux/io.h> > +#include <linux/sysdev.h> > +#include <linux/gpio.h> > + > +#include <asm/bitops.h> > +#include <asm/hardware/vic.h> > + > +#include <plat/regs-irqtype.h> > + > +#include <mach/map.h> > +#include <plat/cpu.h> > +#include <plat/pm.h> > + > +#include <plat/gpio-cfg.h> > +#include <mach/regs-gpio.h> > + > +static inline void s5p_irq_eint_mask(unsigned int irq) > +{ > + u32 mask; > + > + mask = __raw_readl(S5P_EINT_MASK(eint_mask_reg(irq))); > + mask |= eint_irq_to_bit(irq); > + __raw_writel(mask, S5P_EINT_MASK(eint_mask_reg(irq))); > +} > + > +static void s5p_irq_eint_unmask(unsigned int irq) > +{ > + u32 mask; > + > + mask = __raw_readl(S5P_EINT_MASK(eint_mask_reg(irq))); > + mask &= ~(eint_irq_to_bit(irq)); > + __raw_writel(mask, S5P_EINT_MASK(eint_mask_reg(irq))); > +} > + > +static inline void s5p_irq_eint_ack(unsigned int irq) > +{ > + __raw_writel(eint_irq_to_bit(irq), S5P_EINT_PEND(eint_pend_reg(irq))); > +} > + > +static void s5p_irq_eint_maskack(unsigned int irq) > +{ > + /* compiler should in-line these */ > + s5p_irq_eint_mask(irq); > + s5p_irq_eint_ack(irq); > +} > + > +static int s5p_irq_eint_set_type(unsigned int irq, unsigned int type) > +{ > + int offs = eint_offset(irq); > + int shift; > + u32 ctrl, mask; > + u32 newvalue = 0; > + > + switch (type) { > + case IRQ_TYPE_NONE: > + printk(KERN_WARNING "No edge setting!\n"); > + break; > + > + case IRQ_TYPE_EDGE_RISING: > + newvalue = S5P_EXTINT_RISEEDGE; > + break; > + > + case IRQ_TYPE_EDGE_FALLING: > + newvalue = S5P_EXTINT_RISEEDGE; > + break; > + > + case IRQ_TYPE_EDGE_BOTH: > + newvalue = S5P_EXTINT_BOTHEDGE; > + break; > + > + case IRQ_TYPE_LEVEL_LOW: > + newvalue = S5P_EXTINT_LOWLEV; > + break; > + > + case IRQ_TYPE_LEVEL_HIGH: > + newvalue = S5P_EXTINT_HILEV; > + break; > + > + default: > + printk(KERN_ERR "No such irq type %d", type); > + return -EINVAL; > + } > + > + shift = (offs & 0x7) * 4; > + mask = 0x7 << shift; > + > + ctrl = __raw_readl(S5P_EINT_CON(eint_conf_reg(irq))); > + ctrl &= ~mask; > + ctrl |= newvalue << shift; > + __raw_writel(ctrl, S5P_EINT_CON(eint_conf_reg(irq))); > + > + if ((0 <= offs) && (offs < 8)) > + s3c_gpio_cfgpin(EINT_GPIO_REG0(offs & 0x7), EINT_MODE); > + > + else if ((8 <= offs) && (offs < 16)) > + s3c_gpio_cfgpin(EINT_GPIO_REG1(offs & 0x7), EINT_MODE); > + > + else if ((16 <= offs) && (offs < 24)) > + s3c_gpio_cfgpin(EINT_GPIO_REG2(offs & 0x7), EINT_MODE); > + > + else if ((24 <= offs) && (offs < 32)) > + s3c_gpio_cfgpin(EINT_GPIO_REG3(offs & 0x7), EINT_MODE); > + > + else > + printk(KERN_ERR "No such irq number %d", offs); > + > + return 0; > +} > + > +static struct irq_chip s5p_irq_eint = { > + .name = "s5p-eint", > + .mask = s5p_irq_eint_mask, > + .unmask = s5p_irq_eint_unmask, > + .mask_ack = s5p_irq_eint_maskack, > + .ack = s5p_irq_eint_ack, > + .set_type = s5p_irq_eint_set_type, > +#ifdef CONFIG_PM > + .set_wake = s3c_irqext_wake, > +#endif > +}; > + > +/* s5p_irq_demux_eint > + * > + * This function demuxes the IRQ from the group0 external interrupts, > + * from IRQ_EINT(16) to IRQ_EINT(31). It is designed to be inlined into > + * the specific handlers s5p_irq_demux_eintX_Y. > + */ > +static inline void s5p_irq_demux_eint(unsigned int start, unsigned int end) > +{ > + u32 status; > + u32 mask = __raw_readl(S5P_EINT_MASK((start >> 3))); > + unsigned int irq; > + > + status = __raw_readl(S5P_EINT_PEND((start >> 3))); > + status &= ~mask; > + status &= (1 << (end - start + 1)) - 1; We don't need to do any masking here as we'll always be processing all interrupts from the controller. In fact, we probably don't need the end argument here at-all. > + while (status) { > + irq = fls(status); > + generic_handle_irq(irq - 1 + IRQ_EINT(start)); > + status &= ~(1 << irq); > + } > +} > + > +static void s5p_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc) > +{ > + s5p_irq_demux_eint(16, 23); > + s5p_irq_demux_eint(24, 31); > +} > + > +static inline void s5p_irq_vic_eint_mask(unsigned int irq) > +{ > + s5p_irq_eint_mask(irq); > +} > + > +static void s5p_irq_vic_eint_unmask(unsigned int irq) > +{ > + s5p_irq_eint_unmask(irq); > +} > + > +static inline void s5p_irq_vic_eint_ack(unsigned int irq) > +{ > + __raw_writel(eint_irq_to_bit(irq), S5P_EINT_PEND(eint_pend_reg(irq))); > +} > + > +static void s5p_irq_vic_eint_maskack(unsigned int irq) > +{ > + s5p_irq_vic_eint_mask(irq); > + s5p_irq_vic_eint_ack(irq); > +} > + > +static struct irq_chip s5p_irq_vic_eint = { > + .name = "s5p_vic_eint", > + .mask = s5p_irq_vic_eint_mask, > + .unmask = s5p_irq_vic_eint_unmask, > + .mask_ack = s5p_irq_vic_eint_maskack, > + .ack = s5p_irq_vic_eint_ack, > + .set_type = s5p_irq_eint_set_type, > +#ifdef CONFIG_PM > + .set_wake = s3c_irqext_wake, > +#endif > +}; > + > +int __init s5p_init_irq_eint(void) > +{ > + int irq; > + > + for (irq = IRQ_EINT(0); irq <= IRQ_EINT(15); irq++) > + set_irq_chip(irq, &s5p_irq_vic_eint); > + > + for (irq = IRQ_EINT_GRP(16); irq <= IRQ_EINT_GRP(31); irq++) { > + set_irq_chip(irq, &s5p_irq_eint); > + set_irq_handler(irq, handle_level_irq); > + set_irq_flags(irq, IRQF_VALID); > + } > + > + set_irq_chained_handler(IRQ_EINT16_31, s5p_irq_demux_eint16_31); > + return 0; > +} > + > +arch_initcall(s5p_init_irq_eint); > -- -- Ben Q: What's a light-year? A: One-third less calories than a regular year. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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