From: Ma Jun <majun...@huawei.com> Add the interrupt controller chip operation functions of mbigen chip.
Signed-off-by: Ma Jun <majun...@huawei.com> --- drivers/irqchip/irq-mbigen.c | 97 +++++++++++++++++++++++++++++++++++++++-- 1 files changed, 92 insertions(+), 5 deletions(-) diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c index 3a20b25..729e6ac 100644 --- a/drivers/irqchip/irq-mbigen.c +++ b/drivers/irqchip/irq-mbigen.c @@ -47,6 +47,20 @@ #define REG_MBIGEN_VEC_OFFSET 0x200 /** + * offset of clear register in mbigen node + * This register is used to clear the status + * of interrupt + */ +#define REG_MBIGEN_CLEAR_OFFSET 0xa00 + +/** + * offset of interrupt type register + * This register is used to configure interrupt + * trigger type + */ +#define REG_MBIGEN_TYPE_OFFSET 0x0 + +/** * struct mbigen_device - holds the information of mbigen device. * * @pdev: pointer to the platform device structure of mbigen chip. @@ -63,11 +77,19 @@ struct mbigen_device { * struct mbigen_irq_data - private data of each irq * * @base: mapped address of mbigen chip + * @pin_offset: local pin offset of interrupt. * @reg_vec: addr offset of interrupt vector register. + * @reg_type: addr offset of interrupt trigger type register. + * @reg_clear: addr offset of interrupt clear register. + * @type: interrupt trigger type. */ struct mbigen_irq_data { void __iomem *base; + unsigned int pin_offset; unsigned int reg_vec; + unsigned int reg_type; + unsigned int reg_clear; + unsigned int type; }; static inline int get_mbigen_vec_reg(u32 nid, u32 offset) @@ -76,6 +98,60 @@ static inline int get_mbigen_vec_reg(u32 nid, u32 offset) + REG_MBIGEN_VEC_OFFSET; } +static int get_mbigen_type_reg(u32 nid, u32 offset) +{ + int ofst; + + ofst = offset / 32 * 4; + return ofst + nid * MBIGEN_NODE_OFFSET + + REG_MBIGEN_TYPE_OFFSET; +} + +static int get_mbigen_clear_reg(u32 nid, u32 offset) +{ + int ofst; + + ofst = offset / 32 * 4; + return ofst + nid * MBIGEN_NODE_OFFSET + + REG_MBIGEN_CLEAR_OFFSET; +} + +static void mbigen_eoi_irq(struct irq_data *data) +{ + struct mbigen_irq_data *mgn_irq_data = irq_data_get_irq_chip_data(data); + u32 mask; + + /* only level triggered interrupt need to clear status */ + if (mgn_irq_data->type == IRQ_TYPE_LEVEL_HIGH) { + mask = 1 << (mgn_irq_data->pin_offset % 32); + writel_relaxed(mask, mgn_irq_data->reg_clear + mgn_irq_data->base); + } + + irq_chip_eoi_parent(data); +} + +static int mbigen_set_type(struct irq_data *d, unsigned int type) +{ + struct mbigen_irq_data *mgn_irq_data = irq_data_get_irq_chip_data(d); + u32 mask; + int val; + + if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING) + return -EINVAL; + + mask = 1 << (mgn_irq_data->pin_offset % 32); + + val = readl_relaxed(mgn_irq_data->reg_type + mgn_irq_data->base); + + if (type == IRQ_TYPE_LEVEL_HIGH) + val |= mask; + else if (type == IRQ_TYPE_EDGE_RISING) + val &= ~mask; + + writel_relaxed(val, mgn_irq_data->reg_type + mgn_irq_data->base); + + return 0; +} static struct irq_chip mbigen_irq_chip = { .name = "mbigen-v2", @@ -99,10 +175,11 @@ static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg) writel_relaxed(val, mgn_irq_data->reg_vec + mgn_irq_data->base); } -static struct mbigen_irq_data *set_mbigen_irq_data(int hwirq) +static struct mbigen_irq_data *set_mbigen_irq_data(int hwirq, + unsigned int type) { struct mbigen_irq_data *datap; - unsigned int nid, pin_offset; + unsigned int nid; datap = kzalloc(sizeof(*datap), GFP_KERNEL); if (!datap) @@ -111,11 +188,20 @@ static struct mbigen_irq_data *set_mbigen_irq_data(int hwirq) /* get the mbigen node number */ nid = (hwirq - RESERVED_IRQ_PER_MBIGEN_CHIP) / IRQS_PER_MBIGEN_NODE + 1; - pin_offset = (hwirq - RESERVED_IRQ_PER_MBIGEN_CHIP) + datap->pin_offset = (hwirq - RESERVED_IRQ_PER_MBIGEN_CHIP) % IRQS_PER_MBIGEN_NODE; - datap->reg_vec = get_mbigen_vec_reg(nid, pin_offset); + datap->reg_vec = get_mbigen_vec_reg(nid, datap->pin_offset); + datap->reg_type = get_mbigen_type_reg(nid, datap->pin_offset); + + /* no clear register for edge triggered interrupt */ + if (type == IRQ_TYPE_EDGE_RISING) + datap->reg_clear = 0; + else + datap->reg_clear = get_mbigen_clear_reg(nid, + datap->pin_offset); + datap->type = type; return datap; } @@ -143,6 +229,7 @@ static int mbigen_irq_domain_alloc(struct irq_domain *domain, { struct irq_fwspec *fwspec = args; irq_hw_number_t hwirq = fwspec->param[0]; + unsigned int type = fwspec->param[1]; struct mbigen_device *mgn_chip; struct mbigen_irq_data *mgn_irq_data; int i, err; @@ -152,7 +239,7 @@ static int mbigen_irq_domain_alloc(struct irq_domain *domain, return err; /* set related information of this irq */ - mgn_irq_data = set_mbigen_irq_data(hwirq); + mgn_irq_data = set_mbigen_irq_data(hwirq, type); if (!mgn_irq_data) return err; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/