drivers/sh/intc/internals.h

   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
  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  */
  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
 111 /* access.c */
 112 extern unsigned long
 113 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
 114
 115 extern unsigned long
 116 (*intc_enable_fns[])(unsigned long addr, unsigned long handle,
 117                      unsigned long (*fn)(unsigned long,
 118                                 unsigned long, unsigned long),
 119                      unsigned int irq);
 120 extern unsigned long
 121 (*intc_disable_fns[])(unsigned long addr, unsigned long handle,
 122                       unsigned long (*fn)(unsigned long,
 123                                 unsigned long, unsigned long),
 124                       unsigned int irq);
 125 extern unsigned long
 126 (*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
 127                             unsigned long (*fn)(unsigned long,
 128                                 unsigned long, unsigned long),
 129                             unsigned int irq);
 130
 131 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
 132 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
 133 unsigned int intc_set_field_from_handle(unsigned int value,
 134                             unsigned int field_value,
 135                             unsigned int handle);
 136 unsigned long intc_get_field_from_handle(unsigned int value,
 137                                          unsigned int handle);
 138
 139 /* balancing.c */
 140 #ifdef CONFIG_INTC_BALANCING
 141 void intc_balancing_enable(unsigned int irq);
 142 void intc_balancing_disable(unsigned int irq);
 143 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
 144                           struct intc_desc_int *d, intc_enum id);
 145 #else
 146 static inline void intc_balancing_enable(unsigned int irq) { }
 147 static inline void intc_balancing_disable(unsigned int irq) { }
 148 static inline void
 149 intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
 150                      struct intc_desc_int *d, intc_enum id) { }
 151 #endif
 152
 153 /* chip.c */
 154 extern struct irq_chip intc_irq_chip;
 155 void _intc_enable(struct irq_data *data, unsigned long handle);
 156
 157 /* core.c */
 158 extern struct list_head intc_list;
 159 extern raw_spinlock_t intc_big_lock;
 160 extern unsigned int nr_intc_controllers;
 161 extern struct bus_type intc_subsys;
 162
 163 unsigned int intc_get_dfl_prio_level(void);
 164 unsigned int intc_get_prio_level(unsigned int irq);
 165 void intc_set_prio_level(unsigned int irq, unsigned int level);
 166
 167 /* handle.c */
 168 unsigned int intc_get_mask_handle(struct intc_desc *desc,
 169                                   struct intc_desc_int *d,
 170                                   intc_enum enum_id, int do_grps);
 171 unsigned int intc_get_prio_handle(struct intc_desc *desc,
 172                                   struct intc_desc_int *d,
 173                                   intc_enum enum_id, int do_grps);
 174 unsigned int intc_get_sense_handle(struct intc_desc *desc,
 175                                    struct intc_desc_int *d,
 176                                    intc_enum enum_id);
 177 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
 178                          struct intc_desc_int *d, intc_enum id);
 179 unsigned long intc_get_ack_handle(unsigned int irq);
 180 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
 181                               intc_enum enum_id, int enable);
 182
 183 /* virq.c */
 184 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
 185 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
 186 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);