1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __SH_INTC_H
3 #define __SH_INTC_H
4 
5 #include <linux/ioport.h>
6 
7 #ifdef CONFIG_SUPERH
8 #define INTC_NR_IRQS	512
9 #else
10 #define INTC_NR_IRQS	1024
11 #endif
12 
13 /*
14  * Convert back and forth between INTEVT and IRQ values.
15  */
16 #ifdef CONFIG_CPU_HAS_INTEVT
17 #define evt2irq(evt)		(((evt) >> 5) - 16)
18 #define irq2evt(irq)		(((irq) + 16) << 5)
19 #else
20 #define evt2irq(evt)		(evt)
21 #define irq2evt(irq)		(irq)
22 #endif
23 
24 typedef unsigned char intc_enum;
25 
26 struct intc_vect {
27 	intc_enum enum_id;
28 	unsigned short vect;
29 };
30 
31 #define INTC_VECT(enum_id, vect) { enum_id, vect }
32 #define INTC_IRQ(enum_id, irq) INTC_VECT(enum_id, irq2evt(irq))
33 
34 struct intc_group {
35 	intc_enum enum_id;
36 	intc_enum enum_ids[32];
37 };
38 
39 #define INTC_GROUP(enum_id, ids...) { enum_id, { ids } }
40 
41 struct intc_subgroup {
42 	unsigned long reg, reg_width;
43 	intc_enum parent_id;
44 	intc_enum enum_ids[32];
45 };
46 
47 struct intc_mask_reg {
48 	unsigned long set_reg, clr_reg, reg_width;
49 	intc_enum enum_ids[32];
50 #ifdef CONFIG_INTC_BALANCING
51 	unsigned long dist_reg;
52 #endif
53 #ifdef CONFIG_SMP
54 	unsigned long smp;
55 #endif
56 };
57 
58 struct intc_prio_reg {
59 	unsigned long set_reg, clr_reg, reg_width, field_width;
60 	intc_enum enum_ids[16];
61 #ifdef CONFIG_SMP
62 	unsigned long smp;
63 #endif
64 };
65 
66 struct intc_sense_reg {
67 	unsigned long reg, reg_width, field_width;
68 	intc_enum enum_ids[16];
69 };
70 
71 #ifdef CONFIG_INTC_BALANCING
72 #define INTC_SMP_BALANCING(reg)	.dist_reg = (reg)
73 #else
74 #define INTC_SMP_BALANCING(reg)
75 #endif
76 
77 #ifdef CONFIG_SMP
78 #define INTC_SMP(stride, nr)	.smp = (stride) | ((nr) << 8)
79 #else
80 #define INTC_SMP(stride, nr)
81 #endif
82 
83 struct intc_hw_desc {
84 	struct intc_vect *vectors;
85 	unsigned int nr_vectors;
86 	struct intc_group *groups;
87 	unsigned int nr_groups;
88 	struct intc_mask_reg *mask_regs;
89 	unsigned int nr_mask_regs;
90 	struct intc_prio_reg *prio_regs;
91 	unsigned int nr_prio_regs;
92 	struct intc_sense_reg *sense_regs;
93 	unsigned int nr_sense_regs;
94 	struct intc_mask_reg *ack_regs;
95 	unsigned int nr_ack_regs;
96 	struct intc_subgroup *subgroups;
97 	unsigned int nr_subgroups;
98 };
99 
100 #define _INTC_SIZEOF_OR_ZERO(a) (_Generic(a,                 \
101                                  typeof(NULL):  0,           \
102                                  default:       sizeof(a)))
103 #define _INTC_ARRAY(a) a, _INTC_SIZEOF_OR_ZERO(a)/sizeof(*a)
104 
105 #define INTC_HW_DESC(vectors, groups, mask_regs,	\
106 		     prio_regs,	sense_regs, ack_regs)	\
107 {							\
108 	_INTC_ARRAY(vectors), _INTC_ARRAY(groups),	\
109 	_INTC_ARRAY(mask_regs), _INTC_ARRAY(prio_regs),	\
110 	_INTC_ARRAY(sense_regs), _INTC_ARRAY(ack_regs),	\
111 }
112 
113 struct intc_desc {
114 	char *name;
115 	struct resource *resource;
116 	unsigned int num_resources;
117 	intc_enum force_enable;
118 	intc_enum force_disable;
119 	bool skip_syscore_suspend;
120 	struct intc_hw_desc hw;
121 };
122 
123 #define DECLARE_INTC_DESC(symbol, chipname, vectors, groups,		\
124 	mask_regs, prio_regs, sense_regs)				\
125 struct intc_desc symbol __initdata = {					\
126 	.name = chipname,						\
127 	.hw = INTC_HW_DESC(vectors, groups, mask_regs,			\
128 			   prio_regs, sense_regs, NULL),		\
129 }
130 
131 #define DECLARE_INTC_DESC_ACK(symbol, chipname, vectors, groups,	\
132 	mask_regs, prio_regs, sense_regs, ack_regs)			\
133 struct intc_desc symbol __initdata = {					\
134 	.name = chipname,						\
135 	.hw = INTC_HW_DESC(vectors, groups, mask_regs,			\
136 			   prio_regs, sense_regs, ack_regs),		\
137 }
138 
139 int register_intc_controller(struct intc_desc *desc);
140 int intc_set_priority(unsigned int irq, unsigned int prio);
141 int intc_irq_lookup(const char *chipname, intc_enum enum_id);
142 void intc_finalize(void);
143 
144 #ifdef CONFIG_INTC_USERIMASK
145 int register_intc_userimask(unsigned long addr);
146 #else
register_intc_userimask(unsigned long addr)147 static inline int register_intc_userimask(unsigned long addr)
148 {
149 	return 0;
150 }
151 #endif
152 
153 #endif /* __SH_INTC_H */
154