drivers/sh/intc/internals.h

   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
  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  */
 101 static inline void activate_irq(int irq)
 102 {
 103         irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
 104 }
 105
 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
 149 static inline void intc_balancing_enable(unsigned int irq) { }
 150 static inline void intc_balancing_disable(unsigned int irq) { }
 151 static inline void
 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);