sysdev/ge/ge_pic.c

2  * Interrupt handling for GE FPGA based PIC
18 #include <linux/interrupt.h>
40 /* Interrupt Controller Interface Registers */
59  * Interrupt Controller Handling
61  * The interrupt controller handles interrupts for most on board interrupts,
69  * 12    RO Real Time Clock Interrupt Status
70  * 11    RO Temperature Interrupt Status
71  * 10    RO Temperature Critical Interrupt Status
72  * 9     RO Ethernet PHY1 Interrupt Status
73  * 8     RO Ethernet PHY3 Interrupt Status
74  * 7     RO PEX8548 Interrupt Status
76  * 5     RO Watchdog 0 Interrupt Status
77  * 4     RO Watchdog 1 Interrupt Status
78  * 3     RO AXIS Message FIFO A Interrupt Status
79  * 2     RO AXIS Message FIFO B Interrupt Status
80  * 1     RO AXIS Message FIFO C Interrupt Status
81  * 0     RO AXIS Message FIFO D Interrupt Status
85  * interrupt could generate interrupts on both output lines!
102 	 * See if we actually have an interrupt, call generic handling code if  in gef_pic_cascade()
110 	chip->irq_eoi(&desc->irq_data);  in gef_pic_cascade()
117 	u32 mask;  in gef_pic_mask()  local
120 	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));  in gef_pic_mask()
121 	mask &= ~(1 << hwirq);  in gef_pic_mask()
122 	out_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0), mask);  in gef_pic_mask()
128 	/* Don't think we actually have to do anything to ack an interrupt,  in gef_pic_mask_ack()
129 	 * we just need to clear down the devices interrupt and it will go away  in gef_pic_mask_ack()
138 	u32 mask;  in gef_pic_unmask()  local
141 	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));  in gef_pic_unmask()
142 	mask |= (1 << hwirq);  in gef_pic_unmask()
143 	out_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0), mask);  in gef_pic_unmask()
155 /* When an interrupt is being configured, this call allows some flexibility
183 	.map	= gef_pic_host_map,
195 	/* Map the devices registers into memory */  in gef_pic_init()
209 	/* Map controller */  in gef_pic_init()
212 		printk(KERN_ERR "SBC610: failed to map cascade interrupt");  in gef_pic_init()
227  * This is called when we receive an interrupt with apparently comes from this
228  * chip - check, returning the highest interrupt generated or return 0.
232 	u32 cause, mask, active;  in gef_pic_get_irq()  local
238 	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));  in gef_pic_get_irq()
240 	active = cause & mask;  in gef_pic_get_irq()
243 		for (hwirq = GEF_PIC_NUM_IRQS - 1; hwirq > -1; hwirq--) {  in gef_pic_get_irq()