1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/sh_intc.h>
3 #include <linux/irq.h>
4 #include <linux/irqdomain.h>
5 #include <linux/list.h>
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <linux/radix-tree.h>
9 #include <linux/device.h>
10
11 #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
12 ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
13 ((addr_e) << 16) | ((addr_d << 24)))
14
15 #define _INTC_SHIFT(h) (h & 0x1f)
16 #define _INTC_WIDTH(h) ((h >> 5) & 0xf)
17 #define _INTC_FN(h) ((h >> 9) & 0xf)
18 #define _INTC_MODE(h) ((h >> 13) & 0x7)
19 #define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
20 #define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
21
22 #ifdef CONFIG_SMP
23 #define IS_SMP(x) (x.smp)
24 #define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
25 #define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
26 #else
27 #define IS_SMP(x) 0
28 #define INTC_REG(d, x, c) (d->reg[(x)])
29 #define SMP_NR(d, x) 1
30 #endif
31
32 struct intc_handle_int {
33 unsigned int irq;
34 unsigned long handle;
35 };
36
37 struct intc_window {
38 phys_addr_t phys;
39 void __iomem *virt;
40 unsigned long size;
41 };
42
43 struct intc_map_entry {
44 intc_enum enum_id;
45 struct intc_desc_int *desc;
46 };
47
48 struct intc_subgroup_entry {
49 unsigned int pirq;
50 intc_enum enum_id;
51 unsigned long handle;
52 };
53
54 struct intc_desc_int {
55 struct list_head list;
56 struct device dev;
57 struct radix_tree_root tree;
58 raw_spinlock_t lock;
59 unsigned int index;
60 unsigned long *reg;
61 #ifdef CONFIG_SMP
62 unsigned long *smp;
63 #endif
64 unsigned int nr_reg;
65 struct intc_handle_int *prio;
66 unsigned int nr_prio;
67 struct intc_handle_int *sense;
68 unsigned int nr_sense;
69 struct intc_window *window;
70 unsigned int nr_windows;
71 struct irq_domain *domain;
72 struct irq_chip chip;
73 bool skip_suspend;
74 };
75
76
77 enum {
78 REG_FN_ERR = 0,
79 REG_FN_TEST_BASE = 1,
80 REG_FN_WRITE_BASE = 5,
81 REG_FN_MODIFY_BASE = 9
82 };
83
84 enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
85 MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
86 MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
87 MODE_PRIO_REG, /* Priority value written to enable interrupt */
88 MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
89 };
90
get_intc_desc(unsigned int irq)91 static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
92 {
93 struct irq_chip *chip = irq_get_chip(irq);
94
95 return container_of(chip, struct intc_desc_int, chip);
96 }
97
98 /*
99 * Grumble.
100 */
activate_irq(int irq)101 static inline void activate_irq(int irq)
102 {
103 irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
104 }
105
intc_handle_int_cmp(const void * a,const void * b)106 static inline int intc_handle_int_cmp(const void *a, const void *b)
107 {
108 const struct intc_handle_int *_a = a;
109 const struct intc_handle_int *_b = b;
110
111 return _a->irq - _b->irq;
112 }
113
114 /* access.c */
115 extern unsigned long
116 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
117
118 extern unsigned long
119 (*intc_enable_fns[])(unsigned long addr, unsigned long handle,
120 unsigned long (*fn)(unsigned long,
121 unsigned long, unsigned long),
122 unsigned int irq);
123 extern unsigned long
124 (*intc_disable_fns[])(unsigned long addr, unsigned long handle,
125 unsigned long (*fn)(unsigned long,
126 unsigned long, unsigned long),
127 unsigned int irq);
128 extern unsigned long
129 (*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
130 unsigned long (*fn)(unsigned long,
131 unsigned long, unsigned long),
132 unsigned int irq);
133
134 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
135 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
136 unsigned int intc_set_field_from_handle(unsigned int value,
137 unsigned int field_value,
138 unsigned int handle);
139 unsigned long intc_get_field_from_handle(unsigned int value,
140 unsigned int handle);
141
142 /* balancing.c */
143 #ifdef CONFIG_INTC_BALANCING
144 void intc_balancing_enable(unsigned int irq);
145 void intc_balancing_disable(unsigned int irq);
146 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
147 struct intc_desc_int *d, intc_enum id);
148 #else
intc_balancing_enable(unsigned int irq)149 static inline void intc_balancing_enable(unsigned int irq) { }
intc_balancing_disable(unsigned int irq)150 static inline void intc_balancing_disable(unsigned int irq) { }
151 static inline void
intc_set_dist_handle(unsigned int irq,struct intc_desc * desc,struct intc_desc_int * d,intc_enum id)152 intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
153 struct intc_desc_int *d, intc_enum id) { }
154 #endif
155
156 /* chip.c */
157 extern struct irq_chip intc_irq_chip;
158 void _intc_enable(struct irq_data *data, unsigned long handle);
159
160 /* core.c */
161 extern struct list_head intc_list;
162 extern raw_spinlock_t intc_big_lock;
163 extern struct bus_type intc_subsys;
164
165 unsigned int intc_get_dfl_prio_level(void);
166 unsigned int intc_get_prio_level(unsigned int irq);
167 void intc_set_prio_level(unsigned int irq, unsigned int level);
168
169 /* handle.c */
170 unsigned int intc_get_mask_handle(struct intc_desc *desc,
171 struct intc_desc_int *d,
172 intc_enum enum_id, int do_grps);
173 unsigned int intc_get_prio_handle(struct intc_desc *desc,
174 struct intc_desc_int *d,
175 intc_enum enum_id, int do_grps);
176 unsigned int intc_get_sense_handle(struct intc_desc *desc,
177 struct intc_desc_int *d,
178 intc_enum enum_id);
179 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
180 struct intc_desc_int *d, intc_enum id);
181 unsigned long intc_get_ack_handle(unsigned int irq);
182 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
183 intc_enum enum_id, int enable);
184
185 /* irqdomain.c */
186 void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
187
188 /* virq.c */
189 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
190 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
191 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
192