irq.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * SDK7786 FPGA IRQ Controller Support.
 4 *
 5 * Copyright (C) 2010  Matt Fleming
 6 * Copyright (C) 2010  Paul Mundt
 7 */
 8#include <linux/irq.h>
 9#include <mach/fpga.h>
10#include <mach/irq.h>
11
12enum {
13	ATA_IRQ_BIT		= 1,
14	SPI_BUSY_BIT		= 2,
15	LIRQ5_BIT		= 3,
16	LIRQ6_BIT		= 4,
17	LIRQ7_BIT		= 5,
18	LIRQ8_BIT		= 6,
19	KEY_IRQ_BIT		= 7,
20	PEN_IRQ_BIT		= 8,
21	ETH_IRQ_BIT		= 9,
22	RTC_ALARM_BIT		= 10,
23	CRYSTAL_FAIL_BIT	= 12,
24	ETH_PME_BIT		= 14,
25};
26
27void __init sdk7786_init_irq(void)
28{
29	unsigned int tmp;
30
31	/* Enable priority encoding for all IRLs */
32	fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);
33
34	/* Clear FPGA interrupt status registers */
35	fpga_write_reg(0x0000, INTASR);
36	fpga_write_reg(0x0000, INTBSR);
37
38	/* Unmask FPGA interrupts */
39	tmp = fpga_read_reg(INTAMR);
40	tmp &= ~(1 << ETH_IRQ_BIT);
41	fpga_write_reg(tmp, INTAMR);
42
43	plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
44	plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
45}