1 /*
2 * r8a7779 processor support
3 *
4 * Copyright (C) 2011, 2013 Renesas Solutions Corp.
5 * Copyright (C) 2011 Magnus Damm
6 * Copyright (C) 2013 Cogent Embedded, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17 #include <linux/clk/shmobile.h>
18 #include <linux/clocksource.h>
19 #include <linux/init.h>
20 #include <linux/irq.h>
21 #include <linux/irqchip.h>
22 #include <linux/irqchip/arm-gic.h>
23
24 #include <asm/mach/arch.h>
25 #include <asm/mach/map.h>
26
27 #include "common.h"
28 #include "r8a7779.h"
29
30 static struct map_desc r8a7779_io_desc[] __initdata = {
31 /* 2M identity mapping for 0xf0000000 (MPCORE) */
32 {
33 .virtual = 0xf0000000,
34 .pfn = __phys_to_pfn(0xf0000000),
35 .length = SZ_2M,
36 .type = MT_DEVICE_NONSHARED
37 },
38 /* 16M identity mapping for 0xfexxxxxx (DMAC-S/HPBREG/INTC2/LRAM/DBSC) */
39 {
40 .virtual = 0xfe000000,
41 .pfn = __phys_to_pfn(0xfe000000),
42 .length = SZ_16M,
43 .type = MT_DEVICE_NONSHARED
44 },
45 };
46
r8a7779_map_io(void)47 static void __init r8a7779_map_io(void)
48 {
49 debug_ll_io_init();
50 iotable_init(r8a7779_io_desc, ARRAY_SIZE(r8a7779_io_desc));
51 }
52
53 /* IRQ */
54 #define INT2SMSKCR0 IOMEM(0xfe7822a0)
55 #define INT2SMSKCR1 IOMEM(0xfe7822a4)
56 #define INT2SMSKCR2 IOMEM(0xfe7822a8)
57 #define INT2SMSKCR3 IOMEM(0xfe7822ac)
58 #define INT2SMSKCR4 IOMEM(0xfe7822b0)
59
60 #define INT2NTSR0 IOMEM(0xfe700060)
61 #define INT2NTSR1 IOMEM(0xfe700064)
62
r8a7779_init_irq_dt(void)63 static void __init r8a7779_init_irq_dt(void)
64 {
65 irqchip_init();
66
67 /* route all interrupts to ARM */
68 __raw_writel(0xffffffff, INT2NTSR0);
69 __raw_writel(0x3fffffff, INT2NTSR1);
70
71 /* unmask all known interrupts in INTCS2 */
72 __raw_writel(0xfffffff0, INT2SMSKCR0);
73 __raw_writel(0xfff7ffff, INT2SMSKCR1);
74 __raw_writel(0xfffbffdf, INT2SMSKCR2);
75 __raw_writel(0xbffffffc, INT2SMSKCR3);
76 __raw_writel(0x003fee3f, INT2SMSKCR4);
77 }
78
79 #define MODEMR 0xffcc0020
80
r8a7779_read_mode_pins(void)81 static u32 __init r8a7779_read_mode_pins(void)
82 {
83 static u32 mode;
84 static bool mode_valid;
85
86 if (!mode_valid) {
87 void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
88 BUG_ON(!modemr);
89 mode = ioread32(modemr);
90 iounmap(modemr);
91 mode_valid = true;
92 }
93
94 return mode;
95 }
96
r8a7779_init_time(void)97 static void __init r8a7779_init_time(void)
98 {
99 r8a7779_clocks_init(r8a7779_read_mode_pins());
100 clocksource_probe();
101 }
102
103 static const char *const r8a7779_compat_dt[] __initconst = {
104 "renesas,r8a7779",
105 NULL,
106 };
107
108 DT_MACHINE_START(R8A7779_DT, "Generic R8A7779 (Flattened Device Tree)")
109 .smp = smp_ops(r8a7779_smp_ops),
110 .map_io = r8a7779_map_io,
111 .init_early = shmobile_init_delay,
112 .init_time = r8a7779_init_time,
113 .init_irq = r8a7779_init_irq_dt,
114 .init_late = shmobile_init_late,
115 .dt_compat = r8a7779_compat_dt,
116 MACHINE_END
117