1 /*
2  * Renesas Solutions Highlander R7785RP Support.
3  *
4  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
5  * Copyright (C) 2006 - 2008  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 	/* FPGA specific interrupt sources */
21 	CF,		/* Compact Flash */
22 	SMBUS,		/* SMBUS */
23 	TP,		/* Touch panel */
24 	RTC,		/* RTC Alarm */
25 	TH_ALERT,	/* Temperature sensor */
26 	AX88796,	/* Ethernet controller */
27 
28 	/* external bus connector */
29 	EXT0, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7,
30 };
31 
32 static struct intc_vect vectors[] __initdata = {
33 	INTC_IRQ(CF, IRQ_CF),
34 	INTC_IRQ(SMBUS, IRQ_SMBUS),
35 	INTC_IRQ(TP, IRQ_TP),
36 	INTC_IRQ(RTC, IRQ_RTC),
37 	INTC_IRQ(TH_ALERT, IRQ_TH_ALERT),
38 
39 	INTC_IRQ(EXT0, IRQ_EXT0), INTC_IRQ(EXT1, IRQ_EXT1),
40 	INTC_IRQ(EXT2, IRQ_EXT2), INTC_IRQ(EXT3, IRQ_EXT3),
41 
42 	INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
43 	INTC_IRQ(EXT6, IRQ_EXT6), INTC_IRQ(EXT7, IRQ_EXT7),
44 
45 	INTC_IRQ(AX88796, IRQ_AX88796),
46 };
47 
48 static struct intc_mask_reg mask_registers[] __initdata = {
49 	{ 0xa4000010, 0, 16, /* IRLMCR1 */
50 	  { 0, 0, 0, 0, CF, AX88796, SMBUS, TP,
51 	    RTC, 0, TH_ALERT, 0, 0, 0, 0, 0 } },
52 	{ 0xa4000012, 0, 16, /* IRLMCR2 */
53 	  { 0, 0, 0, 0, 0, 0, 0, 0,
54 	    EXT7, EXT6, EXT5, EXT4, EXT3, EXT2, EXT1, EXT0 } },
55 };
56 
57 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
58 	0, IRQ_CF, IRQ_EXT4, IRQ_EXT5,
59 	IRQ_EXT6, IRQ_EXT7, IRQ_SMBUS, IRQ_TP,
60 	IRQ_RTC, IRQ_TH_ALERT, IRQ_AX88796, IRQ_EXT0,
61 	IRQ_EXT1, IRQ_EXT2, IRQ_EXT3,
62 };
63 
64 static DECLARE_INTC_DESC(intc_desc, "r7785rp", vectors,
65 			 NULL, mask_registers, NULL, NULL);
66 
67 unsigned char * __init highlander_plat_irq_setup(void)
68 {
69 	if ((__raw_readw(0xa4000158) & 0xf000) != 0x1000)
70 		return NULL;
71 
72 	printk(KERN_INFO "Using r7785rp interrupt controller.\n");
73 
74 	__raw_writew(0x0000, PA_IRLSSR1);	/* FPGA IRLSSR1(CF_CD clear) */
75 
76 	/* Setup the FPGA IRL */
77 	__raw_writew(0x0000, PA_IRLPRA);	/* FPGA IRLA */
78 	__raw_writew(0xe598, PA_IRLPRB);	/* FPGA IRLB */
79 	__raw_writew(0x7060, PA_IRLPRC);	/* FPGA IRLC */
80 	__raw_writew(0x0000, PA_IRLPRD);	/* FPGA IRLD */
81 	__raw_writew(0x4321, PA_IRLPRE);	/* FPGA IRLE */
82 	__raw_writew(0xdcba, PA_IRLPRF);	/* FPGA IRLF */
83 
84 	register_intc_controller(&intc_desc);
85 	return irl2irq;
86 }
87