xref: /openbmc/linux/arch/sh/boards/mach-se/7780/irq.c (revision 293d5b43)
1 /*
2  * linux/arch/sh/boards/se/7780/irq.c
3  *
4  * Copyright (C) 2006,2007  Nobuhiro Iwamatsu
5  *
6  * Hitachi UL SolutionEngine 7780 Support.
7  *
8  * This file is subject to the terms and conditions of the GNU General Public
9  * License.  See the file "COPYING" in the main directory of this archive
10  * for more details.
11  */
12 #include <linux/init.h>
13 #include <linux/irq.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <mach-se/mach/se7780.h>
17 
18 #define INTC_BASE	0xffd00000
19 #define INTC_ICR1	(INTC_BASE+0x1c)
20 
21 /*
22  * Initialize IRQ setting
23  */
24 void __init init_se7780_IRQ(void)
25 {
26 	/* enable all interrupt at FPGA */
27 	__raw_writew(0, FPGA_INTMSK1);
28 	/* mask SM501 interrupt */
29 	__raw_writew((__raw_readw(FPGA_INTMSK1) | 0x0002), FPGA_INTMSK1);
30 	/* enable all interrupt at FPGA */
31 	__raw_writew(0, FPGA_INTMSK2);
32 
33 	/* set FPGA INTSEL register */
34 	/* FPGA + 0x06 */
35 	__raw_writew( ((IRQPIN_SM501 << IRQPOS_SM501) |
36 		(IRQPIN_SMC91CX << IRQPOS_SMC91CX)), FPGA_INTSEL1);
37 
38 	/* FPGA + 0x08 */
39 	__raw_writew(((IRQPIN_EXTINT4 << IRQPOS_EXTINT4) |
40 		(IRQPIN_EXTINT3 << IRQPOS_EXTINT3) |
41 		(IRQPIN_EXTINT2 << IRQPOS_EXTINT2) |
42 		(IRQPIN_EXTINT1 << IRQPOS_EXTINT1)), FPGA_INTSEL2);
43 
44 	/* FPGA + 0x0A */
45 	__raw_writew((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);
46 
47 	plat_irq_setup_pins(IRQ_MODE_IRQ); /* install handlers for IRQ0-7 */
48 
49 	/* ICR1: detect low level(for 2ndcut) */
50 	__raw_writel(0xAAAA0000, INTC_ICR1);
51 
52 	/*
53 	 * FPGA PCISEL register initialize
54 	 *
55 	 *  CPU  || SLOT1 | SLOT2 | S-ATA | USB
56 	 *  -------------------------------------
57 	 *  INTA || INTA  | INTD  |  --   | INTB
58 	 *  -------------------------------------
59 	 *  INTB || INTB  | INTA  |  --   | INTC
60 	 *  -------------------------------------
61 	 *  INTC || INTC  | INTB  | INTA  |  --
62 	 *  -------------------------------------
63 	 *  INTD || INTD  | INTC  |  --   | INTA
64 	 *  -------------------------------------
65 	 */
66 	__raw_writew(0x0013, FPGA_PCI_INTSEL1);
67 	__raw_writew(0xE402, FPGA_PCI_INTSEL2);
68 }
69