This patch adds IRQ support for S5P6440. Signed-off-by: Kukjin Kim <[email protected]> Signed-off-by: Adityapratap Sharma <[email protected]> Signed-off-by: Thomas Abraham <[email protected]> Signed-off-by: Atul Dahiya <[email protected]> --- arch/arm/mach-s5p6440/include/mach/irqs.h | 111 +++++++++++ arch/arm/mach-s5p6440/include/mach/regs-irq.h | 23 +++ arch/arm/plat-s5p/include/plat/irqs.h | 79 ++++++++ arch/arm/plat-s5p/irq.c | 251 +++++++++++++++++++++++++ 4 files changed, 464 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-s5p6440/include/mach/irqs.h create mode 100644 arch/arm/mach-s5p6440/include/mach/regs-irq.h create mode 100644 arch/arm/plat-s5p/include/plat/irqs.h create mode 100644 arch/arm/plat-s5p/irq.c
diff --git a/arch/arm/mach-s5p6440/include/mach/irqs.h b/arch/arm/mach-s5p6440/include/mach/irqs.h new file mode 100644 index 0000000..53c8f79 --- /dev/null +++ b/arch/arm/mach-s5p6440/include/mach/irqs.h @@ -0,0 +1,111 @@ +/* linux/arch/arm/mach-s5p6440/include/mach/irqs.h + * + * Copyright 2009 Samsung Electronics + * http://www.samsung.com/ + * + * S5P6440 - IRQ 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_S5P_IRQS_H +#define __ASM_ARCH_S5P_IRQS_H __FILE__ + +#include <plat/irqs.h> + +/* VIC0 */ + +#define IRQ_EINT0_3 S5P_IRQ_VIC0(0) +#define IRQ_EINT4_11 S5P_IRQ_VIC0(1) +#define IRQ_RTC_TIC S5P_IRQ_VIC0(2) +#define IRQ_IIC1 S5P_IRQ_VIC0(5) +#define IRQ_I2SV40 S5P_IRQ_VIC0(6) +#define IRQ_GPS S5P_IRQ_VIC0(7) +#define IRQ_POST0 S5P_IRQ_VIC0(9) +#define IRQ_2D S5P_IRQ_VIC0(11) +#define IRQ_TIMER0_VIC S5P_IRQ_VIC0(23) +#define IRQ_TIMER1_VIC S5P_IRQ_VIC0(24) +#define IRQ_TIMER2_VIC S5P_IRQ_VIC0(25) +#define IRQ_WDT S5P_IRQ_VIC0(26) +#define IRQ_TIMER3_VIC S5P_IRQ_VIC0(27) +#define IRQ_TIMER4_VIC S5P_IRQ_VIC0(28) +#define IRQ_DISPCON0 S5P_IRQ_VIC0(29) +#define IRQ_DISPCON1 S5P_IRQ_VIC0(30) +#define IRQ_DISPCON2 S5P_IRQ_VIC0(31) + +/* VIC1 */ + +#define IRQ_EINT12_15 S5P_IRQ_VIC1(0) +#define IRQ_PCM0 S5P_IRQ_VIC1(2) +#define IRQ_UART0 S5P_IRQ_VIC1(5) +#define IRQ_UART1 S5P_IRQ_VIC1(6) +#define IRQ_UART2 S5P_IRQ_VIC1(7) +#define IRQ_UART3 S5P_IRQ_VIC1(8) +#define IRQ_DMA0 S5P_IRQ_VIC1(9) +#define IRQ_NFC S5P_IRQ_VIC1(13) +#define IRQ_SPI0 S5P_IRQ_VIC1(16) +#define IRQ_SPI1 S5P_IRQ_VIC1(17) +#define IRQ_IIC S5P_IRQ_VIC1(18) +#define IRQ_DISPCON3 S5P_IRQ_VIC1(19) +#define IRQ_FIMGVG S5P_IRQ_VIC1(20) +#define IRQ_EINTG1_G9 S5P_IRQ_VIC1(21) +#define IRQ_PMUIRQ S5P_IRQ_VIC1(23) +#define IRQ_HSMMC0 S5P_IRQ_VIC1(24) +#define IRQ_HSMMC1 S5P_IRQ_VIC1(25) +#define IRQ_HSMMC2 IRQ_SPI1 /* shared with SPI1 */ +#define IRQ_OTG S5P_IRQ_VIC1(26) +#define IRQ_DSI S5P_IRQ_VIC1(27) +#define IRQ_RTC_ALARM S5P_IRQ_VIC1(28) +#define IRQ_TSI S5P_IRQ_VIC1(29) +#define IRQ_PENDN S5P_IRQ_VIC1(30) +#define IRQ_TC IRQ_PENDN +#define IRQ_ADC S5P_IRQ_VIC1(31) + +/* + * Since the IRQ_EINT(x) are a linear mapping on s5p6440 we just defined + * them as an IRQ_EINT(x) macro from S5P_IRQ_EINT_BASE which we place + * after the pair of VICs. + */ + +#define S5P_IRQ_EINT_BASE (S5P_IRQ_VIC1(31) + 6) + +#define S5P_EINT(x) ((x) + S5P_IRQ_EINT_BASE) +#define IRQ_EINT(x) S5P_EINT(x) + +/* + * Next the external interrupt groups. These are similar to the IRQ_EINT(x) + * that they are sourced from the GPIO pins but with a different scheme for + * priority and source indication. + * + * The IRQ_EINT(x) can be thought of as 'group 0' of the available GPIO + * interrupts, but for historical reasons they are kept apart from these + * next interrupts. + * + * Use IRQ_EINT_GROUP(group, offset) to get the number for use in the + * machine specific support files. + */ + +/* Actually, #6 and #7 are missing in the EINT_GROUP1 */ +#define IRQ_EINT_GROUP1_NR (15) +#define IRQ_EINT_GROUP2_NR (8) +#define IRQ_EINT_GROUP5_NR (7) +#define IRQ_EINT_GROUP6_NR (10) +/* Actually, #0, #1 and #2 are missing in the EINT_GROUP8 */ +#define IRQ_EINT_GROUP8_NR (11) + +#define IRQ_EINT_GROUP_BASE S5P_EINT(16) +#define IRQ_EINT_GROUP1_BASE (IRQ_EINT_GROUP_BASE + 0) +#define IRQ_EINT_GROUP2_BASE (IRQ_EINT_GROUP1_BASE + IRQ_EINT_GROUP1_NR) +#define IRQ_EINT_GROUP5_BASE (IRQ_EINT_GROUP2_BASE + IRQ_EINT_GROUP2_NR) +#define IRQ_EINT_GROUP6_BASE (IRQ_EINT_GROUP5_BASE + IRQ_EINT_GROUP5_NR) +#define IRQ_EINT_GROUP8_BASE (IRQ_EINT_GROUP6_BASE + IRQ_EINT_GROUP6_NR) + +#define IRQ_EINT_GROUP(grp, x) (IRQ_EINT_GROUP##grp##__BASE + (x)) + +/* Set the default NR_IRQS */ + +#define NR_IRQS (IRQ_EINT_GROUP8_BASE + IRQ_EINT_GROUP8_NR + 1) + +#endif /* __ASM_ARCH_S5P_IRQS_H */ diff --git a/arch/arm/mach-s5p6440/include/mach/regs-irq.h b/arch/arm/mach-s5p6440/include/mach/regs-irq.h new file mode 100644 index 0000000..88885eb --- /dev/null +++ b/arch/arm/mach-s5p6440/include/mach/regs-irq.h @@ -0,0 +1,23 @@ +/* linux/arch/arm/mach-s5p6440/include/mach/regs-irq.h + * + * Copyright (c) 2009 Samsung Electronics + * http://www.samsung.com/ + * + * S5P6440 - IRQ 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_IRQ_H +#define __ASM_ARCH_REGS_IRQ_H __FILE__ + +#include <asm/hardware/vic.h> +#include <mach/map.h> + +/* interrupt controller */ +#define S5P_VIC0REG(x) (S5P_VA_VIC0 + (x)) +#define S5P_VIC1REG(x) (S5P_VA_VIC1 + (x)) + +#endif /* __ASM_ARCH_REGS_IRQ_H */ diff --git a/arch/arm/plat-s5p/include/plat/irqs.h b/arch/arm/plat-s5p/include/plat/irqs.h new file mode 100644 index 0000000..47f5191 --- /dev/null +++ b/arch/arm/plat-s5p/include/plat/irqs.h @@ -0,0 +1,79 @@ +/* linux/arch/arm/plat-s5p/include/plat/irqs.h + * + * Copyright (c) 2009 Samsung Electronics + * http://www.samsung.com/ + * + * S5P Common IRQ 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. +*/ + +#ifndef __ASM_PLAT_S5P_IRQS_H +#define __ASM_PLAT_S5P_IRQS_H __FILE__ + +/* we keep the first set of CPU IRQs out of the range of + * the ISA space, so that the PC104 has them to itself + * and we don't end up having to do horrible things to the + * standard ISA drivers.... + * + * note, since we're using the VICs, our start must be a + * mulitple of 32 to allow the common code to work + */ + +#define S5P_IRQ_OFFSET (32) + +#define S5P_IRQ(x) ((x) + S5P_IRQ_OFFSET) + +#define S5P_VIC0_BASE S5P_IRQ(0) +#define S5P_VIC1_BASE S5P_IRQ(32) + +/* UART interrupts, each UART has 4 intterupts per channel so + * use the space between the ISA and S3C main interrupts. Note, these + * are not in the same order as the S3C24XX series! */ + +#define IRQ_S5P_UART_BASE0 (16) +#define IRQ_S5P_UART_BASE1 (20) +#define IRQ_S5P_UART_BASE2 (24) +#define IRQ_S5P_UART_BASE3 (28) + +#define UART_IRQ_RXD (0) +#define UART_IRQ_ERR (1) +#define UART_IRQ_TXD (2) + +#define IRQ_S5P_UART_RX0 (IRQ_S5P_UART_BASE0 + UART_IRQ_RXD) +#define IRQ_S5P_UART_TX0 (IRQ_S5P_UART_BASE0 + UART_IRQ_TXD) +#define IRQ_S5P_UART_ERR0 (IRQ_S5P_UART_BASE0 + UART_IRQ_ERR) + +#define IRQ_S5P_UART_RX1 (IRQ_S5P_UART_BASE1 + UART_IRQ_RXD) +#define IRQ_S5P_UART_TX1 (IRQ_S5P_UART_BASE1 + UART_IRQ_TXD) +#define IRQ_S5P_UART_ERR1 (IRQ_S5P_UART_BASE1 + UART_IRQ_ERR) + +#define IRQ_S5P_UART_RX2 (IRQ_S5P_UART_BASE2 + UART_IRQ_RXD) +#define IRQ_S5P_UART_TX2 (IRQ_S5P_UART_BASE2 + UART_IRQ_TXD) +#define IRQ_S5P_UART_ERR2 (IRQ_S5P_UART_BASE2 + UART_IRQ_ERR) + +#define IRQ_S5P_UART_RX3 (IRQ_S5P_UART_BASE3 + UART_IRQ_RXD) +#define IRQ_S5P_UART_TX3 (IRQ_S5P_UART_BASE3 + UART_IRQ_TXD) +#define IRQ_S5P_UART_ERR3 (IRQ_S5P_UART_BASE3 + UART_IRQ_ERR) + +/* S3C compatibilty defines */ +#define IRQ_S3CUART_RX0 IRQ_S5P_UART_RX0 +#define IRQ_S3CUART_RX1 IRQ_S5P_UART_RX1 +#define IRQ_S3CUART_RX2 IRQ_S5P_UART_RX2 +#define IRQ_S3CUART_RX3 IRQ_S5P_UART_RX3 + +/* VIC based IRQs */ +#define S5P_IRQ_VIC0(x) (S5P_VIC0_BASE + (x)) +#define S5P_IRQ_VIC1(x) (S5P_VIC1_BASE + (x)) + +#define S5P_TIMER_IRQ(x) S5P_IRQ(64 + (x)) + +#define IRQ_TIMER0 S5P_TIMER_IRQ(0) +#define IRQ_TIMER1 S5P_TIMER_IRQ(1) +#define IRQ_TIMER2 S5P_TIMER_IRQ(2) +#define IRQ_TIMER3 S5P_TIMER_IRQ(3) +#define IRQ_TIMER4 S5P_TIMER_IRQ(4) + +#endif /* __ASM_PLAT_S5P_IRQS_H */ diff --git a/arch/arm/plat-s5p/irq.c b/arch/arm/plat-s5p/irq.c new file mode 100644 index 0000000..ebd2165 --- /dev/null +++ b/arch/arm/plat-s5p/irq.c @@ -0,0 +1,251 @@ +/* arch/arm/plat-s5p/irq.c + * + * Copyright (c) 2009 Samsung Electronics + * http://www.samsung.com/ + * + * S5P - Interrupt handling + * + * 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 <asm/hardware/vic.h> + +#include <linux/serial_core.h> +#include <mach/map.h> +#include <plat/regs-timer.h> +#include <plat/regs-serial.h> +#include <plat/cpu.h> + +#define VIC_VAADDR(no) (S5P_VA_VIC0 + ((no)*0x10000)) +#define VIC_BASE(no) (S5P_VIC0_BASE + ((no)*32)) + +/* Timer interrupt handling */ + +static void s5p_irq_demux_timer(unsigned int base_irq, unsigned int sub_irq) +{ + generic_handle_irq(sub_irq); +} + +static void s5p_irq_demux_timer0(unsigned int irq, struct irq_desc *desc) +{ + s5p_irq_demux_timer(irq, IRQ_TIMER0); +} + +static void s5p_irq_demux_timer1(unsigned int irq, struct irq_desc *desc) +{ + s5p_irq_demux_timer(irq, IRQ_TIMER1); +} + +static void s5p_irq_demux_timer2(unsigned int irq, struct irq_desc *desc) +{ + s5p_irq_demux_timer(irq, IRQ_TIMER2); +} + +static void s5p_irq_demux_timer3(unsigned int irq, struct irq_desc *desc) +{ + s5p_irq_demux_timer(irq, IRQ_TIMER3); +} + +static void s5p_irq_demux_timer4(unsigned int irq, struct irq_desc *desc) +{ + s5p_irq_demux_timer(irq, IRQ_TIMER4); +} + +/* We assume the IRQ_TIMER0..IRQ_TIMER4 range is continuous. */ + +static void s5p_irq_timer_mask(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; /* mask out pending interrupts */ + reg &= ~(1 << (irq - IRQ_TIMER0)); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static void s5p_irq_timer_unmask(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; /* mask out pending interrupts */ + reg |= 1 << (irq - IRQ_TIMER0); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static void s5p_irq_timer_ack(unsigned int irq) +{ + u32 reg = __raw_readl(S3C64XX_TINT_CSTAT); + + reg &= 0x1f; + reg |= (1 << 5) << (irq - IRQ_TIMER0); + __raw_writel(reg, S3C64XX_TINT_CSTAT); +} + +static struct irq_chip s5p_irq_timer = { + .name = "s5p-timer", + .mask = s5p_irq_timer_mask, + .unmask = s5p_irq_timer_unmask, + .ack = s5p_irq_timer_ack, +}; + +struct uart_irq { + void __iomem *regs; + unsigned int base_irq; + unsigned int parent_irq; +}; + +/* + * Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3] + * are consecutive when looking up the interrupt in the demux routines. + */ +static struct uart_irq uart_irqs[] = { + [0] = { + .regs = S5P_VA_UART0, + .base_irq = IRQ_S5P_UART_BASE0, + .parent_irq = IRQ_UART0, + }, + [1] = { + .regs = S5P_VA_UART1, + .base_irq = IRQ_S5P_UART_BASE1, + .parent_irq = IRQ_UART1, + }, + [2] = { + .regs = S5P_VA_UART2, + .base_irq = IRQ_S5P_UART_BASE2, + .parent_irq = IRQ_UART2, + }, + [3] = { + .regs = S5P_VA_UART3, + .base_irq = IRQ_S5P_UART_BASE3, + .parent_irq = IRQ_UART3, + }, +}; + +static inline void __iomem *s5p_irq_uart_base(unsigned int irq) +{ + struct uart_irq *uirq = get_irq_chip_data(irq); + return uirq->regs; +} + +static inline unsigned int s5p_irq_uart_bit(unsigned int irq) +{ + return irq & 3; +} + +static void s5p_irq_uart_mask(unsigned int irq) +{ + void __iomem *regs = s5p_irq_uart_base(irq); + unsigned int bit = s5p_irq_uart_bit(irq); + u32 reg; + + reg = __raw_readl(regs + S3C64XX_UINTM); + reg |= (1 << bit); + __raw_writel(reg, regs + S3C64XX_UINTM); +} + +static void s5p_irq_uart_maskack(unsigned int irq) +{ + void __iomem *regs = s5p_irq_uart_base(irq); + unsigned int bit = s5p_irq_uart_bit(irq); + u32 reg; + + reg = __raw_readl(regs + S3C64XX_UINTM); + reg |= (1 << bit); + __raw_writel(reg, regs + S3C64XX_UINTM); + __raw_writel(1 << bit, regs + S3C64XX_UINTP); +} + +static void s5p_irq_uart_unmask(unsigned int irq) +{ + void __iomem *regs = s5p_irq_uart_base(irq); + unsigned int bit = s5p_irq_uart_bit(irq); + u32 reg; + + reg = __raw_readl(regs + S3C64XX_UINTM); + reg &= ~(1 << bit); + __raw_writel(reg, regs + S3C64XX_UINTM); +} + +static void s5p_irq_uart_ack(unsigned int irq) +{ + void __iomem *regs = s5p_irq_uart_base(irq); + unsigned int bit = s5p_irq_uart_bit(irq); + + __raw_writel(1 << bit, regs + S3C64XX_UINTP); +} + +static void s5p_irq_demux_uart(unsigned int irq, struct irq_desc *desc) +{ + struct uart_irq *uirq = &uart_irqs[irq - IRQ_UART0]; + u32 pend = __raw_readl(uirq->regs + S3C64XX_UINTP); + int base = uirq->base_irq; + + if (pend & (1 << 0)) + generic_handle_irq(base); + if (pend & (1 << 1)) + generic_handle_irq(base + 1); + if (pend & (1 << 2)) + generic_handle_irq(base + 2); + if (pend & (1 << 3)) + generic_handle_irq(base + 3); +} + +static struct irq_chip s5p_irq_uart = { + .name = "s5p-uart", + .mask = s5p_irq_uart_mask, + .unmask = s5p_irq_uart_unmask, + .mask_ack = s5p_irq_uart_maskack, + .ack = s5p_irq_uart_ack, +}; + +static void __init s5p_uart_irq(struct uart_irq *uirq) +{ + void __iomem *reg_base = uirq->regs; + unsigned int irq; + int offs; + + /* mask all interrupts at the start. */ + __raw_writel(0xf, reg_base + S3C64XX_UINTM); + + for (offs = 0; offs < 3; offs++) { + irq = uirq->base_irq + offs; + + set_irq_chip(irq, &s5p_irq_uart); + set_irq_chip_data(irq, uirq); + set_irq_handler(irq, handle_level_irq); + set_irq_flags(irq, IRQF_VALID); + } + + set_irq_chained_handler(uirq->parent_irq, s5p_irq_demux_uart); +} + +void __init s5p_init_irq(u32 *vic, u32 num_vic) +{ + int uart, irq; + + /* initialize the VICs */ + for (irq = 0; irq < num_vic; irq++) + vic_init(VIC_VAADDR(irq), VIC_BASE(irq), vic[irq], 0); + + /* add the timer sub-irqs */ + set_irq_chained_handler(IRQ_TIMER0_VIC, s5p_irq_demux_timer0); + set_irq_chained_handler(IRQ_TIMER1_VIC, s5p_irq_demux_timer1); + set_irq_chained_handler(IRQ_TIMER2_VIC, s5p_irq_demux_timer2); + set_irq_chained_handler(IRQ_TIMER3_VIC, s5p_irq_demux_timer3); + set_irq_chained_handler(IRQ_TIMER4_VIC, s5p_irq_demux_timer4); + + for (irq = IRQ_TIMER0; irq <= IRQ_TIMER4; irq++) { + set_irq_chip(irq, &s5p_irq_timer); + set_irq_handler(irq, handle_level_irq); + set_irq_flags(irq, IRQF_VALID); + } + + for (uart = 0; uart < ARRAY_SIZE(uart_irqs); uart++) + s5p_uart_irq(&uart_irqs[uart]); +} -- 1.6.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
