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12#include <linux/interrupt.h>
13#include <linux/init.h>
14#include <linux/irq.h>
15#include <unit/fpga-regs.h>
16
17
18
19
20static void asb2364_fpga_mask(struct irq_data *d)
21{
22 ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0001;
23 SyncExBus();
24}
25
26static void asb2364_fpga_ack(struct irq_data *d)
27{
28 ASB2364_FPGA_REG_IRQ(d->irq - NR_CPU_IRQS) = 0x0001;
29 SyncExBus();
30}
31
32static void asb2364_fpga_mask_ack(struct irq_data *d)
33{
34 ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0001;
35 SyncExBus();
36 ASB2364_FPGA_REG_IRQ(d->irq - NR_CPU_IRQS) = 0x0001;
37 SyncExBus();
38}
39
40static void asb2364_fpga_unmask(struct irq_data *d)
41{
42 ASB2364_FPGA_REG_MASK(d->irq - NR_CPU_IRQS) = 0x0000;
43 SyncExBus();
44}
45
46static struct irq_chip asb2364_fpga_pic = {
47 .name = "fpga",
48 .irq_ack = asb2364_fpga_ack,
49 .irq_mask = asb2364_fpga_mask,
50 .irq_mask_ack = asb2364_fpga_mask_ack,
51 .irq_unmask = asb2364_fpga_unmask,
52};
53
54
55
56
57static irqreturn_t fpga_interrupt(int irq, void *_mask)
58{
59 if ((ASB2364_FPGA_REG_IRQ_LAN & 0x0001) != 0x0001)
60 generic_handle_irq(FPGA_LAN_IRQ);
61 if ((ASB2364_FPGA_REG_IRQ_UART & 0x0001) != 0x0001)
62 generic_handle_irq(FPGA_UART_IRQ);
63 if ((ASB2364_FPGA_REG_IRQ_I2C & 0x0001) != 0x0001)
64 generic_handle_irq(FPGA_I2C_IRQ);
65 if ((ASB2364_FPGA_REG_IRQ_USB & 0x0001) != 0x0001)
66 generic_handle_irq(FPGA_USB_IRQ);
67 if ((ASB2364_FPGA_REG_IRQ_FPGA & 0x0001) != 0x0001)
68 generic_handle_irq(FPGA_FPGA_IRQ);
69
70 return IRQ_HANDLED;
71}
72
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74
75
76static struct irqaction fpga_irq[] = {
77 [0] = {
78 .handler = fpga_interrupt,
79 .flags = IRQF_SHARED,
80 .name = "fpga",
81 },
82};
83
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86
87void __init irq_fpga_init(void)
88{
89 int irq;
90
91 ASB2364_FPGA_REG_MASK_LAN = 0x0001;
92 SyncExBus();
93 ASB2364_FPGA_REG_MASK_UART = 0x0001;
94 SyncExBus();
95 ASB2364_FPGA_REG_MASK_I2C = 0x0001;
96 SyncExBus();
97 ASB2364_FPGA_REG_MASK_USB = 0x0001;
98 SyncExBus();
99 ASB2364_FPGA_REG_MASK_FPGA = 0x0001;
100 SyncExBus();
101
102 for (irq = NR_CPU_IRQS; irq < NR_IRQS; irq++)
103 irq_set_chip_and_handler(irq, &asb2364_fpga_pic,
104 handle_level_irq);
105
106
107 setup_irq(XIRQ1, &fpga_irq[0]);
108}
109