[PATCH] ARM: S3C24XX: add support for second irq set of S3C2416
Heiko Stübner
heiko at sntech.de
Mon Apr 2 15:28:09 EDT 2012
Am Samstag 03 März 2012, 22:19:45 schrieb Heiko Stübner:
> The S3C2416 has a separate second interrupt register-set to support
> additional irqs. This patch adds the necessary constants and registers
> the irq handlers for it.
>
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
and also "ping" :-)
Thanks
Heiko
> ---
> Patch should go on top of the current s3c24xx consolidation
>
> arch/arm/mach-s3c24xx/include/mach/irqs.h | 15 ++++-
> arch/arm/mach-s3c24xx/irq-s3c2416.c | 98
> ++++++++++++++++++++++++++ arch/arm/mach-s3c24xx/s3c2416.c |
> 1 +
> arch/arm/plat-samsung/include/plat/s3c2416.h | 3 +
> 4 files changed, 116 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-s3c24xx/include/mach/irqs.h
> b/arch/arm/mach-s3c24xx/include/mach/irqs.h index e53b217..e120576 100644
> --- a/arch/arm/mach-s3c24xx/include/mach/irqs.h
> +++ b/arch/arm/mach-s3c24xx/include/mach/irqs.h
> @@ -134,6 +134,17 @@
> #define IRQ_S32416_WDT S3C2410_IRQSUB(27)
> #define IRQ_S32416_AC97 S3C2410_IRQSUB(28)
>
> +/* second interrupt-register of s3c2416/s3c2450 */
> +
> +#define S3C2416_IRQ(x) S3C2410_IRQ((x)+54+29)
> +#define IRQ_S3C2416_2D S3C2416_IRQ(0)
> +#define IRQ_S3C2416_IIC1 S3C2416_IRQ(1)
> +#define IRQ_S3C2416_RESERVED2 S3C2416_IRQ(2)
> +#define IRQ_S3C2416_RESERVED3 S3C2416_IRQ(3)
> +#define IRQ_S3C2416_PCM0 S3C2416_IRQ(4)
> +#define IRQ_S3C2416_PCM1 S3C2416_IRQ(5)
> +#define IRQ_S3C2416_I2S0 S3C2416_IRQ(6)
> +#define IRQ_S3C2416_I2S1 S3C2416_IRQ(7)
>
> /* extra irqs for s3c2440 */
>
> @@ -175,7 +186,9 @@
> #define IRQ_S3C2443_WDT S3C2410_IRQSUB(27)
> #define IRQ_S3C2443_AC97 S3C2410_IRQSUB(28)
>
> -#if defined(CONFIG_CPU_S3C2443) || defined(CONFIG_CPU_S3C2416)
> +#if defined(CONFIG_CPU_S3C2416)
> +#define NR_IRQS (IRQ_S3C2416_I2S1+1)
> +#elif defined(CONFIG_CPU_S3C2443)
> #define NR_IRQS (IRQ_S3C2443_AC97+1)
> #else
> #define NR_IRQS (IRQ_S3C2440_AC97+1)
> diff --git a/arch/arm/mach-s3c24xx/irq-s3c2416.c
> b/arch/arm/mach-s3c24xx/irq-s3c2416.c index fd49f35..d92f879 100644
> --- a/arch/arm/mach-s3c24xx/irq-s3c2416.c
> +++ b/arch/arm/mach-s3c24xx/irq-s3c2416.c
> @@ -27,6 +27,7 @@
> #include <linux/ioport.h>
> #include <linux/device.h>
> #include <linux/io.h>
> +#include <linux/syscore_ops.h>
>
> #include <mach/hardware.h>
> #include <asm/irq.h>
> @@ -192,6 +193,43 @@ static struct irq_chip s3c2416_irq_uart3 = {
> .irq_ack = s3c2416_irq_uart3_ack,
> };
>
> +/* second interrupt register */
> +
> +static inline void s3c2416_irq_ack_second(struct irq_data *data)
> +{
> + unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
> +
> + __raw_writel(bitval, S3C2416_SRCPND2);
> + __raw_writel(bitval, S3C2416_INTPND2);
> +}
> +
> +static void s3c2416_irq_mask_second(struct irq_data *data)
> +{
> + unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
> + unsigned long mask;
> +
> + mask = __raw_readl(S3C2416_INTMSK2);
> + mask |= bitval;
> + __raw_writel(mask, S3C2416_INTMSK2);
> +}
> +
> +static void s3c2416_irq_unmask_second(struct irq_data *data)
> +{
> + unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);
> + unsigned long mask;
> +
> + mask = __raw_readl(S3C2416_INTMSK2);
> + mask &= ~bitval;
> + __raw_writel(mask, S3C2416_INTMSK2);
> +}
> +
> +struct irq_chip s3c2416_irq_second = {
> + .irq_ack = s3c2416_irq_ack_second,
> + .irq_mask = s3c2416_irq_mask_second,
> + .irq_unmask = s3c2416_irq_unmask_second,
> +};
> +
> +
> /* IRQ initialisation code */
>
> static int __init s3c2416_add_sub(unsigned int base,
> @@ -213,6 +251,42 @@ static int __init s3c2416_add_sub(unsigned int base,
> return 0;
> }
>
> +static void __init s3c2416_add_second(void)
> +{
> + unsigned long pend;
> + unsigned long last;
> + int irqno;
> + int i;
> +
> + /* first, clear all interrupts pending... */
> + last = 0;
> + for (i = 0; i < 4; i++) {
> + pend = __raw_readl(S3C2416_INTPND2);
> +
> + if (pend == 0 || pend == last)
> + break;
> +
> + __raw_writel(pend, S3C2416_SRCPND2);
> + __raw_writel(pend, S3C2416_INTPND2);
> + printk(KERN_INFO "irq: clearing pending status %08x\n",
> + (int)pend);
> + last = pend;
> + }
> +
> + for (irqno = IRQ_S3C2416_2D; irqno <= IRQ_S3C2416_I2S1; irqno++) {
> + switch (irqno) {
> + case IRQ_S3C2416_RESERVED2:
> + case IRQ_S3C2416_RESERVED3:
> + /* no IRQ here */
> + break;
> + default:
> + irq_set_chip_and_handler(irqno, &s3c2416_irq_second,
> + handle_edge_irq);
> + set_irq_flags(irqno, IRQF_VALID);
> + }
> + }
> +}
> +
> static int __init s3c2416_irq_add(struct device *dev,
> struct subsys_interface *sif)
> {
> @@ -232,6 +306,8 @@ static int __init s3c2416_irq_add(struct device *dev,
> &s3c2416_irq_wdtac97,
> IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);
>
> + s3c2416_add_second();
> +
> return 0;
> }
>
> @@ -248,3 +324,25 @@ static int __init s3c2416_irq_init(void)
>
> arch_initcall(s3c2416_irq_init);
>
> +#ifdef CONFIG_PM
> +static struct sleep_save irq_save[] = {
> + SAVE_ITEM(S3C2416_INTMSK2),
> +};
> +
> +int s3c2416_irq_suspend(void)
> +{
> + s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
> +
> + return 0;
> +}
> +
> +void s3c2416_irq_resume(void)
> +{
> + s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
> +}
> +
> +struct syscore_ops s3c2416_irq_syscore_ops = {
> + .suspend = s3c2416_irq_suspend,
> + .resume = s3c2416_irq_resume,
> +};
> +#endif
> diff --git a/arch/arm/mach-s3c24xx/s3c2416.c
> b/arch/arm/mach-s3c24xx/s3c2416.c index 0e9a71c..694977e 100644
> --- a/arch/arm/mach-s3c24xx/s3c2416.c
> +++ b/arch/arm/mach-s3c24xx/s3c2416.c
> @@ -105,6 +105,7 @@ int __init s3c2416_init(void)
> register_syscore_ops(&s3c2416_pm_syscore_ops);
> #endif
> register_syscore_ops(&s3c24xx_irq_syscore_ops);
> + register_syscore_ops(&s3c2416_irq_syscore_ops);
>
> return device_register(&s3c2416_dev);
> }
> diff --git a/arch/arm/plat-samsung/include/plat/s3c2416.h
> b/arch/arm/plat-samsung/include/plat/s3c2416.h index de2b5bd..7178e33
> 100644
> --- a/arch/arm/plat-samsung/include/plat/s3c2416.h
> +++ b/arch/arm/plat-samsung/include/plat/s3c2416.h
> @@ -24,6 +24,9 @@ extern void s3c2416_init_clocks(int xtal);
> extern int s3c2416_baseclk_add(void);
>
> extern void s3c2416_restart(char mode, const char *cmd);
> +
> +extern struct syscore_ops s3c2416_irq_syscore_ops;
> +
> #else
> #define s3c2416_init_clocks NULL
> #define s3c2416_init_uarts NULL
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