drivers/sh/intc/internals.h

   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
  31 struct intc_handle_int {
  32         unsigned int irq;
  33         unsigned long handle;
  34 };
  35
  36 struct intc_window {
  37         phys_addr_t phys;
  38         void __iomem *virt;
  39         unsigned long size;
  40 };
  41
  42 struct intc_map_entry {
  43         intc_enum enum_id;
  44         struct intc_desc_int *desc;
  45 };
  46
  47 struct intc_subgroup_entry {
  48         unsigned int pirq;
  49         intc_enum enum_id;
  50         unsigned long handle;
  51 };
  52
  53 struct 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
  76 enum {
  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
  83 enum {  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
  90 static 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  */
 100 static 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
 113 static 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 */
 122 extern unsigned long
 123 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
 124
 125 extern 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);
 130 extern 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);
 135 extern 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
 141 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
 142 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
 143 unsigned int intc_set_field_from_handle(unsigned int value,
 144                             unsigned int field_value,
 145                             unsigned int handle);
 146 unsigned long intc_get_field_from_handle(unsigned int value,
 147                                          unsigned int handle);
 148
 149 /* balancing.c */
 150 #ifdef CONFIG_INTC_BALANCING
 151 void intc_balancing_enable(unsigned int irq);
 152 void intc_balancing_disable(unsigned int irq);
 153 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
 154                           struct intc_desc_int *d, intc_enum id);
 155 #else
 156 static inline void intc_balancing_enable(unsigned int irq) { }
 157 static inline void intc_balancing_disable(unsigned int irq) { }
 158 static inline void
 159 intc_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 */
 164 extern struct irq_chip intc_irq_chip;
 165 void _intc_enable(struct irq_data *data, unsigned long handle);
 166
 167 /* core.c */
 168 extern struct list_head intc_list;
 169 extern raw_spinlock_t intc_big_lock;
 170 extern struct bus_type intc_subsys;
 171
 172 unsigned int intc_get_dfl_prio_level(void);
 173 unsigned int intc_get_prio_level(unsigned int irq);
 174 void intc_set_prio_level(unsigned int irq, unsigned int level);
 175
 176 /* handle.c */
 177 unsigned int intc_get_mask_handle(struct intc_desc *desc,
 178                                   struct intc_desc_int *d,
 179                                   intc_enum enum_id, int do_grps);
 180 unsigned int intc_get_prio_handle(struct intc_desc *desc,
 181                                   struct intc_desc_int *d,
 182                                   intc_enum enum_id, int do_grps);
 183 unsigned int intc_get_sense_handle(struct intc_desc *desc,
 184                                    struct intc_desc_int *d,
 185                                    intc_enum enum_id);
 186 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
 187                          struct intc_desc_int *d, intc_enum id);
 188 unsigned long intc_get_ack_handle(unsigned int irq);
 189 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
 190                               intc_enum enum_id, int enable);
 191
 192 /* irqdomain.c */
 193 void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
 194
 195 /* virq.c */
 196 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
 197 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
 198 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);