From: Ben Dooks <ben-linux@xxxxxxxxx>
Use the common UART IRQ handling code for the S5PC100 system.
Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>
---
arch/arm/plat-s5pc1xx/Kconfig | 1 +
arch/arm/plat-s5pc1xx/irq.c | 116 +---------------------------------------
2 files changed, 4 insertions(+), 113 deletions(-)
diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 6438bcd..b7f442b 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -12,6 +12,7 @@ config PLAT_S5PC1XX
select NO_IOPORT
select ARCH_REQUIRE_GPIOLIB
select SAMSUNG_CLKSRC
+ select SAMSUNG_IRQ_UART
select SAMSUNG_IRQ_VIC_TIMER
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
diff --git a/arch/arm/plat-s5pc1xx/irq.c b/arch/arm/plat-s5pc1xx/irq.c
index ae233bd..bfc5248 100644
--- a/arch/arm/plat-s5pc1xx/irq.c
+++ b/arch/arm/plat-s5pc1xx/irq.c
@@ -21,18 +21,13 @@
#include <mach/map.h>
#include <plat/irq-vic-timer.h>
+#include <plat/irq-uart.h>
#include <plat/cpu.h>
-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[] = {
+static struct s3c_uart_irq uart_irqs[] = {
[0] = {
.regs = (void *)S3C_VA_UART0,
.base_irq = IRQ_S3CUART_BASE0,
@@ -55,113 +50,9 @@ static struct uart_irq uart_irqs[] = {
},
};
-static inline void __iomem *s3c_irq_uart_base(unsigned int irq)
-{
- struct uart_irq *uirq = get_irq_chip_data(irq);
- return uirq->regs;
-}
-
-static inline unsigned int s3c_irq_uart_bit(unsigned int irq)
-{
- return irq & 3;
-}
-
-/* UART interrupt registers, not worth adding to seperate include header */
-#define S3C64XX_UINTP 0x30
-#define S3C64XX_UINTSP 0x34
-#define S3C64XX_UINTM 0x38
-
-static void s3c_irq_uart_mask(unsigned int irq)
-{
- void __iomem *regs = s3c_irq_uart_base(irq);
- unsigned int bit = s3c_irq_uart_bit(irq);
- u32 reg;
-
- reg = __raw_readl(regs + S3C64XX_UINTM);
- reg |= (1 << bit);
- __raw_writel(reg, regs + S3C64XX_UINTM);
-}
-
-static void s3c_irq_uart_maskack(unsigned int irq)
-{
- void __iomem *regs = s3c_irq_uart_base(irq);
- unsigned int bit = s3c_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 s3c_irq_uart_unmask(unsigned int irq)
-{
- void __iomem *regs = s3c_irq_uart_base(irq);
- unsigned int bit = s3c_irq_uart_bit(irq);
- u32 reg;
-
- reg = __raw_readl(regs + S3C64XX_UINTM);
- reg &= ~(1 << bit);
- __raw_writel(reg, regs + S3C64XX_UINTM);
-}
-
-static void s3c_irq_uart_ack(unsigned int irq)
-{
- void __iomem *regs = s3c_irq_uart_base(irq);
- unsigned int bit = s3c_irq_uart_bit(irq);
-
- __raw_writel(1 << bit, regs + S3C64XX_UINTP);
-}
-
-static void s3c_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 s3c_irq_uart = {
- .name = "s3c-uart",
- .mask = s3c_irq_uart_mask,
- .unmask = s3c_irq_uart_unmask,
- .mask_ack = s3c_irq_uart_maskack,
- .ack = s3c_irq_uart_ack,
-};
-
-static void __init s5pc1xx_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, &s3c_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, s3c_irq_demux_uart);
-}
-
void __init s5pc1xx_init_irq(u32 *vic_valid, int num)
{
int i;
- int uart;
printk(KERN_DEBUG "%s: initialising interrupts\n", __func__);
@@ -178,8 +69,7 @@ void __init s5pc1xx_init_irq(u32 *vic_valid, int num)
s3c_init_vic_timer_irq(IRQ_TIMER3_VIC, IRQ_TIMER3);
s3c_init_vic_timer_irq(IRQ_TIMER4_VIC, IRQ_TIMER4);
- for (uart = 0; uart < ARRAY_SIZE(uart_irqs); uart++)
- s5pc1xx_uart_irq(&uart_irqs[uart]);
+ s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs));
}
--
1.6.0.4
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