This is a backport of two upstream (3.13) patches:
[platform/upstream/kernel-adaptation-pc.git] / arch / arm / mach-shmobile / intc-r8a7779.c
1 /*
2  * r8a7779 processor support - INTC hardware block
3  *
4  * Copyright (C) 2011  Renesas Solutions Corp.
5  * Copyright (C) 2011  Magnus Damm
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; version 2 of the License.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19  */
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/interrupt.h>
24 #include <linux/irq.h>
25 #include <linux/io.h>
26 #include <linux/irqchip/arm-gic.h>
27 #include <linux/platform_data/irq-renesas-intc-irqpin.h>
28 #include <linux/irqchip.h>
29 #include <mach/common.h>
30 #include <mach/intc.h>
31 #include <mach/irqs.h>
32 #include <mach/r8a7779.h>
33 #include <asm/mach-types.h>
34 #include <asm/mach/arch.h>
35
36 #define INT2SMSKCR0 IOMEM(0xfe7822a0)
37 #define INT2SMSKCR1 IOMEM(0xfe7822a4)
38 #define INT2SMSKCR2 IOMEM(0xfe7822a8)
39 #define INT2SMSKCR3 IOMEM(0xfe7822ac)
40 #define INT2SMSKCR4 IOMEM(0xfe7822b0)
41
42 #define INT2NTSR0 IOMEM(0xfe700060)
43 #define INT2NTSR1 IOMEM(0xfe700064)
44
45 static struct renesas_intc_irqpin_config irqpin0_platform_data = {
46         .irq_base = irq_pin(0), /* IRQ0 -> IRQ3 */
47         .sense_bitfield_width = 2,
48 };
49
50 static struct resource irqpin0_resources[] = {
51         DEFINE_RES_MEM(0xfe78001c, 4), /* ICR1 */
52         DEFINE_RES_MEM(0xfe780010, 4), /* INTPRI */
53         DEFINE_RES_MEM(0xfe780024, 4), /* INTREQ */
54         DEFINE_RES_MEM(0xfe780044, 4), /* INTMSK0 */
55         DEFINE_RES_MEM(0xfe780064, 4), /* INTMSKCLR0 */
56         DEFINE_RES_IRQ(gic_spi(27)), /* IRQ0 */
57         DEFINE_RES_IRQ(gic_spi(28)), /* IRQ1 */
58         DEFINE_RES_IRQ(gic_spi(29)), /* IRQ2 */
59         DEFINE_RES_IRQ(gic_spi(30)), /* IRQ3 */
60 };
61
62 static struct platform_device irqpin0_device = {
63         .name           = "renesas_intc_irqpin",
64         .id             = 0,
65         .resource       = irqpin0_resources,
66         .num_resources  = ARRAY_SIZE(irqpin0_resources),
67         .dev            = {
68                 .platform_data  = &irqpin0_platform_data,
69         },
70 };
71
72 void __init r8a7779_init_irq_extpin(int irlm)
73 {
74         void __iomem *icr0 = ioremap_nocache(0xfe780000, PAGE_SIZE);
75         unsigned long tmp;
76
77         if (icr0) {
78                 tmp = ioread32(icr0);
79                 if (irlm)
80                         tmp |= 1 << 23; /* IRQ0 -> IRQ3 as individual pins */
81                 else
82                         tmp &= ~(1 << 23); /* IRL mode - not supported */
83                 tmp |= (1 << 21); /* LVLMODE = 1 */
84                 iowrite32(tmp, icr0);
85                 iounmap(icr0);
86
87                 if (irlm)
88                         platform_device_register(&irqpin0_device);
89         } else
90                 pr_warn("r8a7779: unable to setup external irq pin mode\n");
91 }
92
93 static int r8a7779_set_wake(struct irq_data *data, unsigned int on)
94 {
95         return 0; /* always allow wakeup */
96 }
97
98 static void __init r8a7779_init_irq_common(void)
99 {
100         gic_arch_extn.irq_set_wake = r8a7779_set_wake;
101
102         /* route all interrupts to ARM */
103         __raw_writel(0xffffffff, INT2NTSR0);
104         __raw_writel(0x3fffffff, INT2NTSR1);
105
106         /* unmask all known interrupts in INTCS2 */
107         __raw_writel(0xfffffff0, INT2SMSKCR0);
108         __raw_writel(0xfff7ffff, INT2SMSKCR1);
109         __raw_writel(0xfffbffdf, INT2SMSKCR2);
110         __raw_writel(0xbffffffc, INT2SMSKCR3);
111         __raw_writel(0x003fee3f, INT2SMSKCR4);
112 }
113
114 void __init r8a7779_init_irq(void)
115 {
116         void __iomem *gic_dist_base = IOMEM(0xf0001000);
117         void __iomem *gic_cpu_base = IOMEM(0xf0000100);
118
119         /* use GIC to handle interrupts */
120         gic_init(0, 29, gic_dist_base, gic_cpu_base);
121
122         r8a7779_init_irq_common();
123 }
124
125 #ifdef CONFIG_OF
126 void __init r8a7779_init_irq_dt(void)
127 {
128         irqchip_init();
129         r8a7779_init_irq_common();
130 }
131 #endif