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-rw-r--r--arch/arm/mach-s5pv310/include/mach/irqs.h74
-rw-r--r--arch/arm/mach-s5pv310/include/mach/regs-irq.h19
-rw-r--r--arch/arm/mach-s5pv310/irq-combiner.c125
3 files changed, 218 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv310/include/mach/irqs.h b/arch/arm/mach-s5pv310/include/mach/irqs.h
new file mode 100644
index 000000000000..56885ca3773c
--- /dev/null
+++ b/arch/arm/mach-s5pv310/include/mach/irqs.h
@@ -0,0 +1,74 @@
1/* linux/arch/arm/mach-s5pv310/include/mach/irqs.h
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
5 *
6 * S5PV210 - IRQ definitions
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 version 2 as
10 * published by the Free Software Foundation.
11*/
12
13#ifndef __ASM_ARCH_IRQS_H
14#define __ASM_ARCH_IRQS_H __FILE__
15
16#include <plat/irqs.h>
17
18/* Private Peripheral Interrupt */
19#define IRQ_PPI(x) S5P_IRQ(x+16)
20
21#define IRQ_LOCALTIMER IRQ_PPI(13)
22
23/* Shared Peripheral Interrupt */
24#define IRQ_SPI(x) S5P_IRQ(x+32)
25
26#define IRQ_EINT0 IRQ_SPI(40)
27#define IRQ_EINT1 IRQ_SPI(41)
28#define IRQ_EINT2 IRQ_SPI(42)
29#define IRQ_EINT3 IRQ_SPI(43)
30#define IRQ_USB_HSOTG IRQ_SPI(44)
31#define IRQ_USB_HOST IRQ_SPI(45)
32#define IRQ_MODEM_IF IRQ_SPI(46)
33#define IRQ_ROTATOR IRQ_SPI(47)
34#define IRQ_JPEG IRQ_SPI(48)
35#define IRQ_2D IRQ_SPI(49)
36#define IRQ_PCIE IRQ_SPI(50)
37#define IRQ_SYSTEM_TIMER IRQ_SPI(51)
38#define IRQ_MFC IRQ_SPI(52)
39#define IRQ_WTD IRQ_SPI(53)
40#define IRQ_AUDIO_SS IRQ_SPI(54)
41#define IRQ_AC97 IRQ_SPI(55)
42#define IRQ_SPDIF IRQ_SPI(56)
43#define IRQ_KEYPAD IRQ_SPI(57)
44#define IRQ_INTFEEDCTRL_SSS IRQ_SPI(58)
45#define IRQ_SLIMBUS IRQ_SPI(59)
46#define IRQ_PMU IRQ_SPI(60)
47#define IRQ_TSI IRQ_SPI(61)
48#define IRQ_SATA IRQ_SPI(62)
49#define IRQ_GPS IRQ_SPI(63)
50
51#define MAX_IRQ_IN_COMBINER 8
52#define COMBINER_GROUP(x) ((x) * MAX_IRQ_IN_COMBINER + IRQ_SPI(64))
53#define COMBINER_IRQ(x, y) (COMBINER_GROUP(x) + y)
54
55#define IRQ_TIMER0_VIC COMBINER_IRQ(22, 0)
56#define IRQ_TIMER1_VIC COMBINER_IRQ(22, 1)
57#define IRQ_TIMER2_VIC COMBINER_IRQ(22, 2)
58#define IRQ_TIMER3_VIC COMBINER_IRQ(22, 3)
59#define IRQ_TIMER4_VIC COMBINER_IRQ(22, 4)
60
61#define IRQ_UART0 COMBINER_IRQ(26, 0)
62#define IRQ_UART1 COMBINER_IRQ(26, 1)
63#define IRQ_UART2 COMBINER_IRQ(26, 2)
64#define IRQ_UART3 COMBINER_IRQ(26, 3)
65#define IRQ_UART4 COMBINER_IRQ(26, 4)
66
67#define IRQ_IIC COMBINER_IRQ(27, 0)
68
69/* Set the default NR_IRQS */
70#define NR_IRQS COMBINER_IRQ(MAX_COMBINER_NR, 0)
71
72#define MAX_COMBINER_NR 39
73
74#endif /* ASM_ARCH_IRQS_H */
diff --git a/arch/arm/mach-s5pv310/include/mach/regs-irq.h b/arch/arm/mach-s5pv310/include/mach/regs-irq.h
new file mode 100644
index 000000000000..c6e09c7f9161
--- /dev/null
+++ b/arch/arm/mach-s5pv310/include/mach/regs-irq.h
@@ -0,0 +1,19 @@
1/* linux/arch/arm/mach-s5pv310/include/mach/regs-irq.h
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
5 *
6 * S5PV310 - IRQ register definitions
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 version 2 as
10 * published by the Free Software Foundation.
11*/
12
13#ifndef __ASM_ARCH_REGS_IRQ_H
14#define __ASM_ARCH_REGS_IRQ_H __FILE__
15
16#include <asm/hardware/gic.h>
17#include <mach/map.h>
18
19#endif /* __ASM_ARCH_REGS_IRQ_H */
diff --git a/arch/arm/mach-s5pv310/irq-combiner.c b/arch/arm/mach-s5pv310/irq-combiner.c
new file mode 100644
index 000000000000..0f7052164f23
--- /dev/null
+++ b/arch/arm/mach-s5pv310/irq-combiner.c
@@ -0,0 +1,125 @@
1/* linux/arch/arm/mach-s5pv310/irq-combiner.c
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Based on arch/arm/common/gic.c
7 *
8 * IRQ COMBINER support
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13*/
14
15#include <linux/io.h>
16
17#include <asm/mach/irq.h>
18
19#define COMBINER_ENABLE_SET 0x0
20#define COMBINER_ENABLE_CLEAR 0x4
21#define COMBINER_INT_STATUS 0xC
22
23static DEFINE_SPINLOCK(irq_controller_lock);
24
25struct combiner_chip_data {
26 unsigned int irq_offset;
27 void __iomem *base;
28};
29
30static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
31
32static inline void __iomem *combiner_base(unsigned int irq)
33{
34 struct combiner_chip_data *combiner_data = get_irq_chip_data(irq);
35 return combiner_data->base;
36}
37
38static void combiner_mask_irq(unsigned int irq)
39{
40 u32 mask = 1 << (irq % 32);
41
42 __raw_writel(mask, combiner_base(irq) + COMBINER_ENABLE_CLEAR);
43}
44
45static void combiner_unmask_irq(unsigned int irq)
46{
47 u32 mask = 1 << (irq % 32);
48
49 __raw_writel(mask, combiner_base(irq) + COMBINER_ENABLE_SET);
50}
51
52static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
53{
54 struct combiner_chip_data *chip_data = get_irq_data(irq);
55 struct irq_chip *chip = get_irq_chip(irq);
56 unsigned int cascade_irq, combiner_irq;
57 unsigned long status;
58
59 /* primary controller ack'ing */
60 chip->ack(irq);
61
62 spin_lock(&irq_controller_lock);
63 status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
64 spin_unlock(&irq_controller_lock);
65
66 if (status == 0)
67 goto out;
68
69 for (combiner_irq = 0; combiner_irq < 32; combiner_irq++) {
70 if (status & 0x1)
71 break;
72 status >>= 1;
73 }
74
75 cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
76 if (unlikely(cascade_irq >= NR_IRQS))
77 do_bad_IRQ(cascade_irq, desc);
78 else
79 generic_handle_irq(cascade_irq);
80
81 out:
82 /* primary controller unmasking */
83 chip->unmask(irq);
84}
85
86static struct irq_chip combiner_chip = {
87 .name = "COMBINER",
88 .mask = combiner_mask_irq,
89 .unmask = combiner_unmask_irq,
90};
91
92void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
93{
94 if (combiner_nr >= MAX_COMBINER_NR)
95 BUG();
96 if (set_irq_data(irq, &combiner_data[combiner_nr]) != 0)
97 BUG();
98 set_irq_chained_handler(irq, combiner_handle_cascade_irq);
99}
100
101void __init combiner_init(unsigned int combiner_nr, void __iomem *base,
102 unsigned int irq_start)
103{
104 unsigned int i;
105
106 if (combiner_nr >= MAX_COMBINER_NR)
107 BUG();
108
109 combiner_data[combiner_nr].base = base;
110 combiner_data[combiner_nr].irq_offset = irq_start;
111
112 /* Disable all interrupts */
113
114 __raw_writel(0xffffffff, base + COMBINER_ENABLE_CLEAR);
115
116 /* Setup the Linux IRQ subsystem */
117
118 for (i = irq_start; i < combiner_data[combiner_nr].irq_offset
119 + MAX_IRQ_IN_COMBINER; i++) {
120 set_irq_chip(i, &combiner_chip);
121 set_irq_chip_data(i, &combiner_data[combiner_nr]);
122 set_irq_handler(i, handle_level_irq);
123 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
124 }
125}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-30 11:57:14 -0500