1 /*
2  * Renesas Solutions Highlander R7780MP Support.
3  *
4  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
5  * Copyright (C) 2006  Paul Mundt
6  * Copyright (C) 2007  Magnus Damm
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/io.h>
15 #include <mach/highlander.h>
16 
17 enum {
18 	UNUSED = 0,
19 
20 	/* board specific interrupt sources */
21 	CF,		/* Compact Flash */
22 	TP,		/* Touch panel */
23 	SCIF1,		/* FPGA SCIF1 */
24 	SCIF0,		/* FPGA SCIF0 */
25 	SMBUS,		/* SMBUS */
26 	RTC,		/* RTC Alarm */
27 	AX88796,	/* Ethernet controller */
28 	PSW,		/* Push Switch */
29 
30 	/* external bus connector */
31 	EXT1, EXT2, EXT4, EXT5, EXT6,
32 };
33 
34 static struct intc_vect vectors[] __initdata = {
35 	INTC_IRQ(CF, IRQ_CF),
36 	INTC_IRQ(TP, IRQ_TP),
37 	INTC_IRQ(SCIF1, IRQ_SCIF1),
38 	INTC_IRQ(SCIF0, IRQ_SCIF0),
39 	INTC_IRQ(SMBUS, IRQ_SMBUS),
40 	INTC_IRQ(RTC, IRQ_RTC),
41 	INTC_IRQ(AX88796, IRQ_AX88796),
42 	INTC_IRQ(PSW, IRQ_PSW),
43 
44 	INTC_IRQ(EXT1, IRQ_EXT1), INTC_IRQ(EXT2, IRQ_EXT2),
45 	INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
46 	INTC_IRQ(EXT6, IRQ_EXT6),
47 };
48 
49 static struct intc_mask_reg mask_registers[] __initdata = {
50 	{ 0xa4000000, 0, 16, /* IRLMSK */
51 	  { SCIF0, SCIF1, RTC, 0, CF, 0, TP, SMBUS,
52 	    0, EXT6, EXT5, EXT4, EXT2, EXT1, PSW, AX88796 } },
53 };
54 
55 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
56 	0, IRQ_CF, IRQ_TP, IRQ_SCIF1,
57 	IRQ_SCIF0, IRQ_SMBUS, IRQ_RTC, IRQ_EXT6,
58 	IRQ_EXT5, IRQ_EXT4, IRQ_EXT2, IRQ_EXT1,
59 	0, IRQ_AX88796, IRQ_PSW,
60 };
61 
62 static DECLARE_INTC_DESC(intc_desc, "r7780mp", vectors,
63 			 NULL, mask_registers, NULL, NULL);
64 
65 unsigned char * __init highlander_plat_irq_setup(void)
66 {
67 	if ((__raw_readw(0xa4000700) & 0xf000) == 0x2000) {
68 		printk(KERN_INFO "Using r7780mp interrupt controller.\n");
69 		register_intc_controller(&intc_desc);
70 		return irl2irq;
71 	}
72 
73 	return NULL;
74 }
75