1#include <linux/sh_intc.h>
2#include <linux/irq.h>
3#include <linux/irqdomain.h>
4#include <linux/list.h>
5#include <linux/kernel.h>
6#include <linux/types.h>
7#include <linux/radix-tree.h>
8#include <linux/device.h>
9
10#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
11	((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
12	 ((addr_e) << 16) | ((addr_d << 24)))
13
14#define _INTC_SHIFT(h)		(h & 0x1f)
15#define _INTC_WIDTH(h)		((h >> 5) & 0xf)
16#define _INTC_FN(h)		((h >> 9) & 0xf)
17#define _INTC_MODE(h)		((h >> 13) & 0x7)
18#define _INTC_ADDR_E(h)		((h >> 16) & 0xff)
19#define _INTC_ADDR_D(h)		((h >> 24) & 0xff)
20
21#ifdef CONFIG_SMP
22#define IS_SMP(x)		(x.smp)
23#define INTC_REG(d, x, c)	(d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
24#define SMP_NR(d, x)		((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
25#else
26#define IS_SMP(x)		0
27#define INTC_REG(d, x, c)	(d->reg[(x)])
28#define SMP_NR(d, x)		1
29#endif
30
31struct intc_handle_int {
32	unsigned int irq;
33	unsigned long handle;
34};
35
36struct intc_window {
37	phys_addr_t phys;
38	void __iomem *virt;
39	unsigned long size;
40};
41
42struct intc_map_entry {
43	intc_enum enum_id;
44	struct intc_desc_int *desc;
45};
46
47struct intc_subgroup_entry {
48	unsigned int pirq;
49	intc_enum enum_id;
50	unsigned long handle;
51};
52
53struct intc_desc_int {
54	struct list_head list;
55	struct device dev;
56	struct radix_tree_root tree;
57	raw_spinlock_t lock;
58	unsigned int index;
59	unsigned long *reg;
60#ifdef CONFIG_SMP
61	unsigned long *smp;
62#endif
63	unsigned int nr_reg;
64	struct intc_handle_int *prio;
65	unsigned int nr_prio;
66	struct intc_handle_int *sense;
67	unsigned int nr_sense;
68	struct intc_window *window;
69	unsigned int nr_windows;
70	struct irq_domain *domain;
71	struct irq_chip chip;
72	bool skip_suspend;
73};
74
75
76enum {
77	REG_FN_ERR = 0,
78	REG_FN_TEST_BASE = 1,
79	REG_FN_WRITE_BASE = 5,
80	REG_FN_MODIFY_BASE = 9
81};
82
83enum {	MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
84	MODE_MASK_REG,       /* Bit(s) set -> interrupt disabled */
85	MODE_DUAL_REG,       /* Two registers, set bit to enable / disable */
86	MODE_PRIO_REG,       /* Priority value written to enable interrupt */
87	MODE_PCLR_REG,       /* Above plus all bits set to disable interrupt */
88};
89
90static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
91{
92	struct irq_chip *chip = irq_get_chip(irq);
93
94	return container_of(chip, struct intc_desc_int, chip);
95}
96
97/*
98 * Grumble.
99 */
100static inline void activate_irq(int irq)
101{
102#ifdef CONFIG_ARM
103	/* ARM requires an extra step to clear IRQ_NOREQUEST, which it
104	 * sets on behalf of every irq_chip.  Also sets IRQ_NOPROBE.
105	 */
106	set_irq_flags(irq, IRQF_VALID);
107#else
108	/* same effect on other architectures */
109	irq_set_noprobe(irq);
110#endif
111}
112
113static inline int intc_handle_int_cmp(const void *a, const void *b)
114{
115	const struct intc_handle_int *_a = a;
116	const struct intc_handle_int *_b = b;
117
118	return _a->irq - _b->irq;
119}
120
121/* access.c */
122extern unsigned long
123(*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
124
125extern unsigned long
126(*intc_enable_fns[])(unsigned long addr, unsigned long handle,
127		     unsigned long (*fn)(unsigned long,
128				unsigned long, unsigned long),
129		     unsigned int irq);
130extern unsigned long
131(*intc_disable_fns[])(unsigned long addr, unsigned long handle,
132		      unsigned long (*fn)(unsigned long,
133				unsigned long, unsigned long),
134		      unsigned int irq);
135extern unsigned long
136(*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
137		            unsigned long (*fn)(unsigned long,
138				unsigned long, unsigned long),
139			    unsigned int irq);
140
141unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
142unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
143unsigned int intc_set_field_from_handle(unsigned int value,
144			    unsigned int field_value,
145			    unsigned int handle);
146unsigned long intc_get_field_from_handle(unsigned int value,
147					 unsigned int handle);
148
149/* balancing.c */
150#ifdef CONFIG_INTC_BALANCING
151void intc_balancing_enable(unsigned int irq);
152void intc_balancing_disable(unsigned int irq);
153void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
154			  struct intc_desc_int *d, intc_enum id);
155#else
156static inline void intc_balancing_enable(unsigned int irq) { }
157static inline void intc_balancing_disable(unsigned int irq) { }
158static inline void
159intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
160		     struct intc_desc_int *d, intc_enum id) { }
161#endif
162
163/* chip.c */
164extern struct irq_chip intc_irq_chip;
165void _intc_enable(struct irq_data *data, unsigned long handle);
166
167/* core.c */
168extern struct list_head intc_list;
169extern raw_spinlock_t intc_big_lock;
170extern struct bus_type intc_subsys;
171
172unsigned int intc_get_dfl_prio_level(void);
173unsigned int intc_get_prio_level(unsigned int irq);
174void intc_set_prio_level(unsigned int irq, unsigned int level);
175
176/* handle.c */
177unsigned int intc_get_mask_handle(struct intc_desc *desc,
178				  struct intc_desc_int *d,
179				  intc_enum enum_id, int do_grps);
180unsigned int intc_get_prio_handle(struct intc_desc *desc,
181				  struct intc_desc_int *d,
182				  intc_enum enum_id, int do_grps);
183unsigned int intc_get_sense_handle(struct intc_desc *desc,
184				   struct intc_desc_int *d,
185				   intc_enum enum_id);
186void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
187			 struct intc_desc_int *d, intc_enum id);
188unsigned long intc_get_ack_handle(unsigned int irq);
189void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
190			      intc_enum enum_id, int enable);
191
192/* irqdomain.c */
193void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
194
195/* virq.c */
196void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
197void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
198struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
199