ARM: S5PC1XX: Use common UART IRQ handling code

Use the common UART IRQ handling code for the S5PC100 system.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

2 files changed, 4 insertions, 113 deletions

diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 256f0f9f1ddf..c7ccdf22eefa 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 ae233bdeb7e2..bfc524827819 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));
 }