diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-mxs.c | 78 |
1 files changed, 59 insertions, 19 deletions
diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c index 96148a7beba1..eaab5a67e536 100644 --- a/drivers/irqchip/irq-mxs.c +++ b/drivers/irqchip/irq-mxs.c @@ -28,18 +28,36 @@ #include <linux/stmp_device.h> #include <asm/exception.h> +/* + * this device provide 4 offsets for each register: + * 0x0 - plain read write mode + * 0x4 - set mode, OR logic. + * 0x8 - clr mode, XOR logic. + * 0xc - togle mode. + */ +#define SET_REG 4 +#define CLR_REG 8 + #define HW_ICOLL_VECTOR 0x0000 #define HW_ICOLL_LEVELACK 0x0010 #define HW_ICOLL_CTRL 0x0020 #define HW_ICOLL_STAT_OFFSET 0x0070 -#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10) -#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10) -#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004 +#define HW_ICOLL_INTERRUPT0 0x0120 +#define HW_ICOLL_INTERRUPTn(n) ((n) * 0x10) +#define BM_ICOLL_INTR_ENABLE BIT(2) #define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1 #define ICOLL_NUM_IRQS 128 -static void __iomem *icoll_base; +struct icoll_priv { + void __iomem *vector; + void __iomem *levelack; + void __iomem *ctrl; + void __iomem *stat; + void __iomem *intr; +}; + +static struct icoll_priv icoll_priv; static struct irq_domain *icoll_domain; static void icoll_ack_irq(struct irq_data *d) @@ -50,19 +68,19 @@ static void icoll_ack_irq(struct irq_data *d) * BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 unconditionally. */ __raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0, - icoll_base + HW_ICOLL_LEVELACK); + icoll_priv.levelack); } static void icoll_mask_irq(struct irq_data *d) { - __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, - icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->hwirq)); + __raw_writel(BM_ICOLL_INTR_ENABLE, + icoll_priv.intr + CLR_REG + HW_ICOLL_INTERRUPTn(d->hwirq)); } static void icoll_unmask_irq(struct irq_data *d) { - __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, - icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq)); + __raw_writel(BM_ICOLL_INTR_ENABLE, + icoll_priv.intr + SET_REG + HW_ICOLL_INTERRUPTn(d->hwirq)); } static struct irq_chip mxs_icoll_chip = { @@ -75,8 +93,8 @@ asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs) { u32 irqnr; - irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET); - __raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR); + irqnr = __raw_readl(icoll_priv.stat); + __raw_writel(irqnr, icoll_priv.vector); handle_domain_irq(icoll_domain, irqnr, regs); } @@ -93,23 +111,45 @@ static const struct irq_domain_ops icoll_irq_domain_ops = { .xlate = irq_domain_xlate_onecell, }; -static int __init icoll_of_init(struct device_node *np, - struct device_node *interrupt_parent) +static void __init icoll_add_domain(struct device_node *np, + int num) +{ + icoll_domain = irq_domain_add_linear(np, num, + &icoll_irq_domain_ops, NULL); + + if (!icoll_domain) + panic("%s: unable to create irq domain", np->full_name); +} + +static void __iomem * __init icoll_init_iobase(struct device_node *np) { - icoll_base = of_iomap(np, 0); + void __iomem *icoll_base; + + icoll_base = of_io_request_and_map(np, 0, np->name); if (!icoll_base) panic("%s: unable to map resource", np->full_name); + return icoll_base; +} + +static int __init icoll_of_init(struct device_node *np, + struct device_node *interrupt_parent) +{ + void __iomem *icoll_base; + + icoll_base = icoll_init_iobase(np); + icoll_priv.vector = icoll_base + HW_ICOLL_VECTOR; + icoll_priv.levelack = icoll_base + HW_ICOLL_LEVELACK; + icoll_priv.ctrl = icoll_base + HW_ICOLL_CTRL; + icoll_priv.stat = icoll_base + HW_ICOLL_STAT_OFFSET; + icoll_priv.intr = icoll_base + HW_ICOLL_INTERRUPT0; /* * Interrupt Collector reset, which initializes the priority * for each irq to level 0. */ - stmp_reset_block(icoll_base + HW_ICOLL_CTRL); + stmp_reset_block(icoll_priv.ctrl); - icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS, - &icoll_irq_domain_ops, NULL); - if (!icoll_domain) - panic("%s: unable to create irqdomain", np->full_name); + icoll_add_domain(np, ICOLL_NUM_IRQS); return 0; } |