diff options
Diffstat (limited to 'drivers/irqchip/spear-shirq.c')
| -rw-r--r-- | drivers/irqchip/spear-shirq.c | 97 |
1 files changed, 45 insertions, 52 deletions
diff --git a/drivers/irqchip/spear-shirq.c b/drivers/irqchip/spear-shirq.c index 8765aa7f7a15..169ef9a385d0 100644 --- a/drivers/irqchip/spear-shirq.c +++ b/drivers/irqchip/spear-shirq.c @@ -49,7 +49,8 @@ struct shirq_regs { * virq_base: Base virtual interrupt number * nr_irqs: Number of interrupts handled by this block * offset: Bit offset of the first interrupt - * disabled: Group is disabled, but accounted + * irq_chip: Interrupt controller chip used for this instance, + * if NULL group is disabled, but accounted */ struct spear_shirq { void __iomem *base; @@ -58,19 +59,50 @@ struct spear_shirq { u32 virq_base; u32 nr_irqs; u32 offset; - bool disabled; + struct irq_chip *irq_chip; }; -static DEFINE_SPINLOCK(lock); - /* spear300 shared irq registers offsets and masks */ #define SPEAR300_INT_ENB_MASK_REG 0x54 #define SPEAR300_INT_STS_MASK_REG 0x58 +static DEFINE_RAW_SPINLOCK(shirq_lock); + +static void shirq_irq_mask(struct irq_data *d) +{ + struct spear_shirq *shirq = irq_data_get_irq_chip_data(d); + u32 val, shift = d->irq - shirq->virq_base + shirq->offset; + u32 __iomem *reg = shirq->base + shirq->regs.enb_reg; + + raw_spin_lock(&shirq_lock); + val = readl(reg) & ~(0x1 << shift); + writel(val, reg); + raw_spin_unlock(&shirq_lock); +} + +static void shirq_irq_unmask(struct irq_data *d) +{ + struct spear_shirq *shirq = irq_data_get_irq_chip_data(d); + u32 val, shift = d->irq - shirq->virq_base + shirq->offset; + u32 __iomem *reg = shirq->base + shirq->regs.enb_reg; + + raw_spin_lock(&shirq_lock); + val = readl(reg) | (0x1 << shift); + writel(val, reg); + raw_spin_unlock(&shirq_lock); +} + +static struct irq_chip shirq_chip = { + .name = "spear-shirq", + .irq_mask = shirq_irq_mask, + .irq_unmask = shirq_irq_unmask, +}; + static struct spear_shirq spear300_shirq_ras1 = { .offset = 0, .nr_irqs = 9, .mask = ((0x1 << 9) - 1) << 0, + .irq_chip = &shirq_chip, .regs = { .enb_reg = SPEAR300_INT_ENB_MASK_REG, .status_reg = SPEAR300_INT_STS_MASK_REG, @@ -88,8 +120,8 @@ static struct spear_shirq spear310_shirq_ras1 = { .offset = 0, .nr_irqs = 8, .mask = ((0x1 << 8) - 1) << 0, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR310_INT_STS_MASK_REG, }, }; @@ -98,6 +130,7 @@ static struct spear_shirq spear310_shirq_ras2 = { .offset = 8, .nr_irqs = 5, .mask = ((0x1 << 5) - 1) << 8, + .irq_chip = &dummy_irq_chip, .regs = { .enb_reg = -1, .status_reg = SPEAR310_INT_STS_MASK_REG, @@ -108,8 +141,8 @@ static struct spear_shirq spear310_shirq_ras3 = { .offset = 13, .nr_irqs = 1, .mask = ((0x1 << 1) - 1) << 13, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR310_INT_STS_MASK_REG, }, }; @@ -118,8 +151,8 @@ static struct spear_shirq spear310_shirq_intrcomm_ras = { .offset = 14, .nr_irqs = 3, .mask = ((0x1 << 3) - 1) << 14, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR310_INT_STS_MASK_REG, }, }; @@ -140,15 +173,14 @@ static struct spear_shirq spear320_shirq_ras3 = { .offset = 0, .nr_irqs = 7, .mask = ((0x1 << 7) - 1) << 0, - .disabled = 1, }; static struct spear_shirq spear320_shirq_ras1 = { .offset = 7, .nr_irqs = 3, .mask = ((0x1 << 3) - 1) << 7, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR320_INT_STS_MASK_REG, }, }; @@ -157,8 +189,8 @@ static struct spear_shirq spear320_shirq_ras2 = { .offset = 10, .nr_irqs = 1, .mask = ((0x1 << 1) - 1) << 10, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR320_INT_STS_MASK_REG, }, }; @@ -167,8 +199,8 @@ static struct spear_shirq spear320_shirq_intrcomm_ras = { .offset = 11, .nr_irqs = 11, .mask = ((0x1 << 11) - 1) << 11, + .irq_chip = &dummy_irq_chip, .regs = { - .enb_reg = -1, .status_reg = SPEAR320_INT_STS_MASK_REG, }, }; @@ -180,45 +212,6 @@ static struct spear_shirq *spear320_shirq_blocks[] = { &spear320_shirq_intrcomm_ras, }; -static void shirq_irq_mask_unmask(struct irq_data *d, bool mask) -{ - struct spear_shirq *shirq = irq_data_get_irq_chip_data(d); - u32 val, offset = d->irq - shirq->virq_base; - unsigned long flags; - - if (shirq->regs.enb_reg == -1) - return; - - spin_lock_irqsave(&lock, flags); - val = readl(shirq->base + shirq->regs.enb_reg); - - if (mask ^ shirq->regs.reset_to_enb) - val &= ~(0x1 << shirq->offset << offset); - else - val |= 0x1 << shirq->offset << offset; - - writel(val, shirq->base + shirq->regs.enb_reg); - spin_unlock_irqrestore(&lock, flags); - -} - -static void shirq_irq_mask(struct irq_data *d) -{ - shirq_irq_mask_unmask(d, 1); -} - -static void shirq_irq_unmask(struct irq_data *d) -{ - shirq_irq_mask_unmask(d, 0); -} - -static struct irq_chip shirq_chip = { - .name = "spear-shirq", - .irq_ack = shirq_irq_mask, - .irq_mask = shirq_irq_mask, - .irq_unmask = shirq_irq_unmask, -}; - static void shirq_handler(unsigned irq, struct irq_desc *desc) { struct spear_shirq *shirq = irq_get_handler_data(irq); @@ -240,7 +233,7 @@ static void __init spear_shirq_register(struct spear_shirq *shirq, { int i; - if (shirq->disabled) + if (!shirq->irq_chip) return; irq_set_chained_handler(parent_irq, shirq_handler); @@ -248,7 +241,7 @@ static void __init spear_shirq_register(struct spear_shirq *shirq, for (i = 0; i < shirq->nr_irqs; i++) { irq_set_chip_and_handler(shirq->virq_base + i, - &shirq_chip, handle_simple_irq); + shirq->irq_chip, handle_simple_irq); set_irq_flags(shirq->virq_base + i, IRQF_VALID); irq_set_chip_data(shirq->virq_base + i, shirq); } |