diff options
author | Ben Dooks <ben-linux@fluff.org> | 2010-01-06 02:18:44 (GMT) |
---|---|---|
committer | Ben Dooks <ben-linux@fluff.org> | 2010-01-15 08:10:14 (GMT) |
commit | 51022cf6591ae2945960d034788bdeffa28cde13 (patch) | |
tree | 30f85bb15cdd66384018c31cb42c4ba986a68da4 /arch/arm/plat-s3c64xx/irq.c | |
parent | 7162ba03729e0a47aaab44448ce2453f07a9664d (diff) | |
download | linux-fsl-qoriq-51022cf6591ae2945960d034788bdeffa28cde13.tar.xz |
ARM: SAMSUNG: Move IRQ UART handling for newer devices to plat-samsung
Move the handling for the UART interrupts out of the s3c64xx specific
code and into plat-samsung so that it can be used by all implementations
that need it.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c64xx/irq.c')
-rw-r--r-- | arch/arm/plat-s3c64xx/irq.c | 117 |
1 files changed, 3 insertions, 114 deletions
diff --git a/arch/arm/plat-s3c64xx/irq.c b/arch/arm/plat-s3c64xx/irq.c index 8b69bca..b98451e 100644 --- a/arch/arm/plat-s3c64xx/irq.c +++ b/arch/arm/plat-s3c64xx/irq.c @@ -22,19 +22,10 @@ #include <mach/map.h> #include <plat/irq-vic-timer.h> -#include <plat/regs-serial.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 = S3C_VA_UART0, .base_irq = IRQ_S3CUART_BASE0, @@ -57,110 +48,9 @@ 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 */ - -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 s3c64xx_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 s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) { - int uart; - printk(KERN_DEBUG "%s: initialising interrupts\n", __func__); /* initialise the pair of VICs */ @@ -175,6 +65,5 @@ void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) 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++) - s3c64xx_uart_irq(&uart_irqs[uart]); + s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs)); } |