1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Renesas Solutions Highlander R7780MP Support.
4  *
5  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
6  * Copyright (C) 2006  Paul Mundt
7  * Copyright (C) 2007  Magnus Damm
8  */
9 #include <linux/init.h>
10 #include <linux/irq.h>
11 #include <linux/io.h>
12 #include <mach/highlander.h>
13 
14 enum {
15 	UNUSED = 0,
16 
17 	/* board specific interrupt sources */
18 	CF,		/* Compact Flash */
19 	TP,		/* Touch panel */
20 	SCIF1,		/* FPGA SCIF1 */
21 	SCIF0,		/* FPGA SCIF0 */
22 	SMBUS,		/* SMBUS */
23 	RTC,		/* RTC Alarm */
24 	AX88796,	/* Ethernet controller */
25 	PSW,		/* Push Switch */
26 
27 	/* external bus connector */
28 	EXT1, EXT2, EXT4, EXT5, EXT6,
29 };
30 
31 static struct intc_vect vectors[] __initdata = {
32 	INTC_IRQ(CF, IRQ_CF),
33 	INTC_IRQ(TP, IRQ_TP),
34 	INTC_IRQ(SCIF1, IRQ_SCIF1),
35 	INTC_IRQ(SCIF0, IRQ_SCIF0),
36 	INTC_IRQ(SMBUS, IRQ_SMBUS),
37 	INTC_IRQ(RTC, IRQ_RTC),
38 	INTC_IRQ(AX88796, IRQ_AX88796),
39 	INTC_IRQ(PSW, IRQ_PSW),
40 
41 	INTC_IRQ(EXT1, IRQ_EXT1), INTC_IRQ(EXT2, IRQ_EXT2),
42 	INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
43 	INTC_IRQ(EXT6, IRQ_EXT6),
44 };
45 
46 static struct intc_mask_reg mask_registers[] __initdata = {
47 	{ 0xa4000000, 0, 16, /* IRLMSK */
48 	  { SCIF0, SCIF1, RTC, 0, CF, 0, TP, SMBUS,
49 	    0, EXT6, EXT5, EXT4, EXT2, EXT1, PSW, AX88796 } },
50 };
51 
52 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
53 	0, IRQ_CF, IRQ_TP, IRQ_SCIF1,
54 	IRQ_SCIF0, IRQ_SMBUS, IRQ_RTC, IRQ_EXT6,
55 	IRQ_EXT5, IRQ_EXT4, IRQ_EXT2, IRQ_EXT1,
56 	0, IRQ_AX88796, IRQ_PSW,
57 };
58 
59 static DECLARE_INTC_DESC(intc_desc, "r7780mp", vectors,
60 			 NULL, mask_registers, NULL, NULL);
61 
highlander_plat_irq_setup(void)62 unsigned char * __init highlander_plat_irq_setup(void)
63 {
64 	if ((__raw_readw(0xa4000700) & 0xf000) == 0x2000) {
65 		printk(KERN_INFO "Using r7780mp interrupt controller.\n");
66 		register_intc_controller(&intc_desc);
67 		return irl2irq;
68 	}
69 
70 	return NULL;
71 }
72