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(addr: 0xa4000158) & 0xf000) != 0x1000) |
67 | return NULL; |
68 | |
69 | printk(KERN_INFO "Using r7785rp interrupt controller.\n" ); |
70 | |
71 | __raw_writew(val: 0x0000, addr: PA_IRLSSR1); /* FPGA IRLSSR1(CF_CD clear) */ |
72 | |
73 | /* Setup the FPGA IRL */ |
74 | __raw_writew(val: 0x0000, addr: PA_IRLPRA); /* FPGA IRLA */ |
75 | __raw_writew(val: 0xe598, addr: PA_IRLPRB); /* FPGA IRLB */ |
76 | __raw_writew(val: 0x7060, addr: PA_IRLPRC); /* FPGA IRLC */ |
77 | __raw_writew(val: 0x0000, addr: PA_IRLPRD); /* FPGA IRLD */ |
78 | __raw_writew(val: 0x4321, addr: PA_IRLPRE); /* FPGA IRLE */ |
79 | __raw_writew(val: 0xdcba, addr: PA_IRLPRF); /* FPGA IRLF */ |
80 | |
81 | register_intc_controller(&intc_desc); |
82 | return irl2irq; |
83 | } |
84 | |