select ARCH_REQUIRE_GPIOLIB
select SAMSUNG_CLKSRC
select SAMSUNG_IRQ_VIC_TIMER
+ select SAMSUNG_IRQ_UART
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
select S3C_GPIO_CFG_S3C24XX
#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,
},
};
-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 */
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));
}
help
Internal configuration to build the VIC timer interrupt code.
+config SAMSUNG_IRQ_UART
+ bool
+ help
+ Internal configuration to build the IRQ UART demux code.
+
# options for gpio configuration support
config S3C_GPIO_CFG_S3C24XX
obj-$(CONFIG_SAMSUNG_CLKSRC) += clock-clksrc.o
+obj-$(CONFIG_SAMSUNG_IRQ_UART) += irq-uart.o
obj-$(CONFIG_SAMSUNG_IRQ_VIC_TIMER) += irq-vic-timer.o
# devices
--- /dev/null
+/* arch/arm/plat-samsung/include/plat/irq-uart.h
+ *
+ * Copyright (c) 2010 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * Header file for Samsung SoC UART IRQ demux for S3C64XX and later
+ *
+ * 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.
+*/
+
+struct s3c_uart_irq {
+ void __iomem *regs;
+ unsigned int base_irq;
+ unsigned int parent_irq;
+};
+
+extern void s3c_init_uart_irqs(struct s3c_uart_irq *irq, unsigned int nr_irqs);
+
--- /dev/null
+/* arch/arm/plat-samsung/irq-uart.c
+ * originally part of arch/arm/plat-s3c64xx/irq.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * Samsung- UART 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/serial_core.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+#include <plat/irq-uart.h>
+#include <plat/regs-serial.h>
+#include <plat/cpu.h>
+
+/* 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 inline void __iomem *s3c_irq_uart_base(unsigned int irq)
+{
+ struct s3c_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;
+}
+
+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 s3c_uart_irq *uirq = desc->handler_data;
+ 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 s3c_init_uart_irq(struct s3c_uart_irq *uirq)
+{
+ struct irq_desc *desc = irq_to_desc(uirq->parent_irq);
+ 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);
+ }
+
+ desc->handler_data = uirq;
+ set_irq_chained_handler(uirq->parent_irq, s3c_irq_demux_uart);
+}
+
+/**
+ * s3c_init_uart_irqs() - initialise UART IRQs and the necessary demuxing
+ * @irq: The interrupt data for registering
+ * @nr_irqs: The number of interrupt descriptions in @irq.
+ *
+ * Register the UART interrupts specified by @irq including the demuxing
+ * routines. This supports the S3C6400 and newer style of devices.
+ */
+void __init s3c_init_uart_irqs(struct s3c_uart_irq *irq, unsigned int nr_irqs)
+{
+ for (; nr_irqs > 0; nr_irqs--, irq++)
+ s3c_init_uart_irq(irq);
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff