drivers/irqchip/spear-shirq.c

2  * SPEAr platform shared irq layer source file
4  * Copyright (C) 2009-2012 ST Microelectronics
18 #include <linux/interrupt.h>
29  * struct spear_shirq: shared irq structure
32  * status_reg:	Status register offset for chained interrupt handler
35  * virq_base:	Base virtual interrupt number
37  * offset:	Bit offset of the first interrupt
38  * irq_chip:	Interrupt controller chip used for this instance,
52 /* spear300 shared irq registers offsets and masks */
61 	u32 val, shift = d->irq - shirq->virq_base + shirq->offset;  in shirq_irq_mask()
62 	u32 __iomem *reg = shirq->base + shirq->mask_reg;  in shirq_irq_mask()
73 	u32 val, shift = d->irq - shirq->virq_base + shirq->offset;  in shirq_irq_unmask()
74 	u32 __iomem *reg = shirq->base + shirq->mask_reg;  in shirq_irq_unmask()
83 	.name		= "spear-shirq",
91 	.mask		= ((0x1 << 9) - 1) << 0,
101 /* spear310 shared irq registers offsets and masks */
107 	.mask		= ((0x1 << 8) - 1) << 0,
115 	.mask		= ((0x1 << 5) - 1) << 8,
123 	.mask		= ((0x1 << 1) - 1) << 13,
131 	.mask		= ((0x1 << 3) - 1) << 14,
143 /* spear320 shared irq registers offsets and masks */
151 	.mask		= ((0x1 << 7) - 1) << 0,
159 	.mask		= ((0x1 << 3) - 1) << 7,
167 	.mask		= ((0x1 << 1) - 1) << 10,
175 	.mask		= ((0x1 << 11) - 1) << 11,
192 	pend = readl(shirq->base + shirq->status_reg) & shirq->mask;  in shirq_handler()
193 	pend >>= shirq->offset;  in shirq_handler()
199 		generic_handle_irq(shirq->virq_base + irq);  in shirq_handler()
208 	if (!shirq->irq_chip)  in spear_shirq_register()
213 	for (i = 0; i < shirq->nr_irqs; i++) {  in spear_shirq_register()
214 		irq_set_chip_and_handler(shirq->virq_base + i,  in spear_shirq_register()
215 					 shirq->irq_chip, handle_simple_irq);  in spear_shirq_register()
216 		irq_set_chip_data(shirq->virq_base + i, shirq);  in spear_shirq_register()
230 		return -ENXIO;  in shirq_init()
234 		nr_irqs += shirq_blocks[i]->nr_irqs;  in shirq_init()
236 	virq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);  in shirq_init()
250 		shirq_blocks[i]->base = base;  in shirq_init()
251 		shirq_blocks[i]->virq_base = irq_find_mapping(shirq_domain,  in shirq_init()
256 		hwirq += shirq_blocks[i]->nr_irqs;  in shirq_init()
265 	return -ENXIO;  in shirq_init()
274 IRQCHIP_DECLARE(spear300_shirq, "st,spear300-shirq", spear300_shirq_of_init);
282 IRQCHIP_DECLARE(spear310_shirq, "st,spear310-shirq", spear310_shirq_of_init);
290 IRQCHIP_DECLARE(spear320_shirq, "st,spear320-shirq", spear320_shirq_of_init);