1 #include <linux/sh_intc.h>
2 #include <linux/irq.h>
3 #include <linux/list.h>
4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <linux/radix-tree.h>
7 #include <linux/device.h>
8
9 #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
10 ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
11 ((addr_e) << 16) | ((addr_d << 24)))
12
13 #define _INTC_SHIFT(h) (h & 0x1f)
14 #define _INTC_WIDTH(h) ((h >> 5) & 0xf)
15 #define _INTC_FN(h) ((h >> 9) & 0xf)
16 #define _INTC_MODE(h) ((h >> 13) & 0x7)
17 #define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
18 #define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
19
20 #ifdef CONFIG_SMP
21 #define IS_SMP(x) (x.smp)
22 #define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
23 #define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
24 #else
25 #define IS_SMP(x) 0
26 #define INTC_REG(d, x, c) (d->reg[(x)])
27 #define SMP_NR(d, x) 1
28 #endif
29
30 struct intc_handle_int {
31 unsigned int irq;
32 unsigned long handle;
33 };
34
35 struct intc_window {
36 phys_addr_t phys;
37 void __iomem *virt;
38 unsigned long size;
39 };
40
41 struct intc_map_entry {
42 intc_enum enum_id;
43 struct intc_desc_int *desc;
44 };
45
46 struct intc_subgroup_entry {
47 unsigned int pirq;
48 intc_enum enum_id;
49 unsigned long handle;
50 };
51
52 struct intc_desc_int {
53 struct list_head list;
54 struct device dev;
55 struct radix_tree_root tree;
56 raw_spinlock_t lock;
57 unsigned int index;
58 unsigned long *reg;
59 #ifdef CONFIG_SMP
60 unsigned long *smp;
61 #endif
62 unsigned int nr_reg;
63 struct intc_handle_int *prio;
64 unsigned int nr_prio;
65 struct intc_handle_int *sense;
66 unsigned int nr_sense;
67 struct intc_window *window;
68 unsigned int nr_windows;
69 struct irq_chip chip;
70 bool skip_suspend;
71 };
72
73
74 enum {
75 REG_FN_ERR = 0,
76 REG_FN_TEST_BASE = 1,
77 REG_FN_WRITE_BASE = 5,
78 REG_FN_MODIFY_BASE = 9
79 };
80
81 enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
82 MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
83 MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
84 MODE_PRIO_REG, /* Priority value written to enable interrupt */
85 MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
86 };
87
get_intc_desc(unsigned int irq)88 static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
89 {
90 struct irq_chip *chip = irq_get_chip(irq);
91
92 return container_of(chip, struct intc_desc_int, chip);
93 }
94
95 /*
96 * Grumble.
97 */
activate_irq(int irq)98 static inline void activate_irq(int irq)
99 {
100 #ifdef CONFIG_ARM
101 /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
102 * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
103 */
104 set_irq_flags(irq, IRQF_VALID);
105 #else
106 /* same effect on other architectures */
107 irq_set_noprobe(irq);
108 #endif
109 }
110
intc_handle_int_cmp(const void * a,const void * b)111 static inline int intc_handle_int_cmp(const void *a, const void *b)
112 {
113 const struct intc_handle_int *_a = a;
114 const struct intc_handle_int *_b = b;
115
116 return _a->irq - _b->irq;
117 }
118
119 /* access.c */
120 extern unsigned long
121 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
122
123 extern unsigned long
124 (*intc_enable_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_disable_fns[])(unsigned long addr, unsigned long handle,
130 unsigned long (*fn)(unsigned long,
131 unsigned long, unsigned long),
132 unsigned int irq);
133 extern unsigned long
134 (*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
135 unsigned long (*fn)(unsigned long,
136 unsigned long, unsigned long),
137 unsigned int irq);
138
139 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
140 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
141 unsigned int intc_set_field_from_handle(unsigned int value,
142 unsigned int field_value,
143 unsigned int handle);
144 unsigned long intc_get_field_from_handle(unsigned int value,
145 unsigned int handle);
146
147 /* balancing.c */
148 #ifdef CONFIG_INTC_BALANCING
149 void intc_balancing_enable(unsigned int irq);
150 void intc_balancing_disable(unsigned int irq);
151 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
152 struct intc_desc_int *d, intc_enum id);
153 #else
intc_balancing_enable(unsigned int irq)154 static inline void intc_balancing_enable(unsigned int irq) { }
intc_balancing_disable(unsigned int irq)155 static inline void intc_balancing_disable(unsigned int irq) { }
156 static inline void
intc_set_dist_handle(unsigned int irq,struct intc_desc * desc,struct intc_desc_int * d,intc_enum id)157 intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
158 struct intc_desc_int *d, intc_enum id) { }
159 #endif
160
161 /* chip.c */
162 extern struct irq_chip intc_irq_chip;
163 void _intc_enable(struct irq_data *data, unsigned long handle);
164
165 /* core.c */
166 extern struct list_head intc_list;
167 extern raw_spinlock_t intc_big_lock;
168 extern struct bus_type intc_subsys;
169
170 unsigned int intc_get_dfl_prio_level(void);
171 unsigned int intc_get_prio_level(unsigned int irq);
172 void intc_set_prio_level(unsigned int irq, unsigned int level);
173
174 /* handle.c */
175 unsigned int intc_get_mask_handle(struct intc_desc *desc,
176 struct intc_desc_int *d,
177 intc_enum enum_id, int do_grps);
178 unsigned int intc_get_prio_handle(struct intc_desc *desc,
179 struct intc_desc_int *d,
180 intc_enum enum_id, int do_grps);
181 unsigned int intc_get_sense_handle(struct intc_desc *desc,
182 struct intc_desc_int *d,
183 intc_enum enum_id);
184 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
185 struct intc_desc_int *d, intc_enum id);
186 unsigned long intc_get_ack_handle(unsigned int irq);
187 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
188 intc_enum enum_id, int enable);
189
190 /* virq.c */
191 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
192 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
193 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
194