1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Renesas Solutions Highlander R7785RP Support.
4 *
5 * Copyright (C) 2002 Atom Create Engineering Co., Ltd.
6 * Copyright (C) 2006 - 2008 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 /* FPGA specific interrupt sources */
18 CF, /* Compact Flash */
19 SMBUS, /* SMBUS */
20 TP, /* Touch panel */
21 RTC, /* RTC Alarm */
22 TH_ALERT, /* Temperature sensor */
23 AX88796, /* Ethernet controller */
24
25 /* external bus connector */
26 EXT0, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7,
27 };
28
29 static struct intc_vect vectors[] __initdata = {
30 INTC_IRQ(CF, IRQ_CF),
31 INTC_IRQ(SMBUS, IRQ_SMBUS),
32 INTC_IRQ(TP, IRQ_TP),
33 INTC_IRQ(RTC, IRQ_RTC),
34 INTC_IRQ(TH_ALERT, IRQ_TH_ALERT),
35
36 INTC_IRQ(EXT0, IRQ_EXT0), INTC_IRQ(EXT1, IRQ_EXT1),
37 INTC_IRQ(EXT2, IRQ_EXT2), INTC_IRQ(EXT3, IRQ_EXT3),
38
39 INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
40 INTC_IRQ(EXT6, IRQ_EXT6), INTC_IRQ(EXT7, IRQ_EXT7),
41
42 INTC_IRQ(AX88796, IRQ_AX88796),
43 };
44
45 static struct intc_mask_reg mask_registers[] __initdata = {
46 { 0xa4000010, 0, 16, /* IRLMCR1 */
47 { 0, 0, 0, 0, CF, AX88796, SMBUS, TP,
48 RTC, 0, TH_ALERT, 0, 0, 0, 0, 0 } },
49 { 0xa4000012, 0, 16, /* IRLMCR2 */
50 { 0, 0, 0, 0, 0, 0, 0, 0,
51 EXT7, EXT6, EXT5, EXT4, EXT3, EXT2, EXT1, EXT0 } },
52 };
53
54 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
55 0, IRQ_CF, IRQ_EXT4, IRQ_EXT5,
56 IRQ_EXT6, IRQ_EXT7, IRQ_SMBUS, IRQ_TP,
57 IRQ_RTC, IRQ_TH_ALERT, IRQ_AX88796, IRQ_EXT0,
58 IRQ_EXT1, IRQ_EXT2, IRQ_EXT3,
59 };
60
61 static DECLARE_INTC_DESC(intc_desc, "r7785rp", vectors,
62 NULL, mask_registers, NULL, NULL);
63
64 unsigned char * __init highlander_plat_irq_setup(void)
65 {
66 if ((__raw_readw(0xa4000158) & 0xf000) != 0x1000)
67 return NULL;
68
69 printk(KERN_INFO "Using r7785rp interrupt controller.\n");
70
71 __raw_writew(0x0000, PA_IRLSSR1); /* FPGA IRLSSR1(CF_CD clear) */
72
73 /* Setup the FPGA IRL */
74 __raw_writew(0x0000, PA_IRLPRA); /* FPGA IRLA */
75 __raw_writew(0xe598, PA_IRLPRB); /* FPGA IRLB */
76 __raw_writew(0x7060, PA_IRLPRC); /* FPGA IRLC */
77 __raw_writew(0x0000, PA_IRLPRD); /* FPGA IRLD */
78 __raw_writew(0x4321, PA_IRLPRE); /* FPGA IRLE */
79 __raw_writew(0xdcba, PA_IRLPRF); /* FPGA IRLF */
80
81 register_intc_controller(&intc_desc);
82 return irl2irq;
83 }
84
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