xref: /openbmc/linux/arch/sh/boards/mach-sdk7786/irq.c (revision 5f240718)
1 /*
2  * SDK7786 FPGA IRQ Controller Support.
3  *
4  * Copyright (C) 2010  Matt Fleming
5  * Copyright (C) 2010  Paul Mundt
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License.  See the file "COPYING" in the main directory of this archive
9  * for more details.
10  */
11 #include <linux/irq.h>
12 #include <mach/fpga.h>
13 #include <mach/irq.h>
14 
15 enum {
16 	ATA_IRQ_BIT		= 1,
17 	SPI_BUSY_BIT		= 2,
18 	LIRQ5_BIT		= 3,
19 	LIRQ6_BIT		= 4,
20 	LIRQ7_BIT		= 5,
21 	LIRQ8_BIT		= 6,
22 	KEY_IRQ_BIT		= 7,
23 	PEN_IRQ_BIT		= 8,
24 	ETH_IRQ_BIT		= 9,
25 	RTC_ALARM_BIT		= 10,
26 	CRYSTAL_FAIL_BIT	= 12,
27 	ETH_PME_BIT		= 14,
28 };
29 
30 void __init sdk7786_init_irq(void)
31 {
32 	unsigned int tmp;
33 
34 	/* Enable priority encoding for all IRLs */
35 	fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);
36 
37 	/* Clear FPGA interrupt status registers */
38 	fpga_write_reg(0x0000, INTASR);
39 	fpga_write_reg(0x0000, INTBSR);
40 
41 	/* Unmask FPGA interrupts */
42 	tmp = fpga_read_reg(INTAMR);
43 	tmp &= ~(1 << ETH_IRQ_BIT);
44 	fpga_write_reg(tmp, INTAMR);
45 
46 	plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
47 	plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
48 }
49