drivers/misc/samsung/scsc/mifintrbit.h

   1 /****************************************************************************
   2  *
   3  * Copyright (c) 2014 - 2016 Samsung Electronics Co., Ltd. All rights reserved
   4  *
   5  ****************************************************************************/
   6
   7 #ifndef __MIFINTRBIT_H
   8 #define __MIFINTRBIT_H
   9
  10 #include <linux/spinlock.h>
  11
  12 /** MIF Interrupt Bit Handler prototype. */
  13 typedef void (*mifintrbit_handler)(int which_bit, void *data);
  14
  15 struct mifintrbit; /* fwd - opaque pointer */
  16
  17 #define MIFINTRBIT_NUM_INT      16
  18
  19 /** Reserve MIF interrupt bits 0 in the to-r4 and to-m4 registers for purpose of forcing panics  */
  20 #define MIFINTRBIT_RESERVED_PANIC_R4     0
  21 #ifdef CONFIG_SCSC_MX450_GDB_SUPPORT
  22 #define MIFINTRBIT_RESERVED_PANIC_M4     0
  23 #define MIFINTRBIT_RESERVED_PANIC_M4_1   0
  24 #else
  25 #define MIFINTRBIT_RESERVED_PANIC_M4     0
  26 #endif
  27
  28 void mifintrbit_init(struct mifintrbit *intr, struct scsc_mif_abs *mif);
  29 void mifintrbit_deinit(struct mifintrbit *intr);
  30
  31 /** Allocates TOHOST MIF interrupt bits, and associates handler for the AP bit.
  32  * Returns the bit index.*/
  33 int mifintrbit_alloc_tohost(struct mifintrbit *intr, mifintrbit_handler handler, void *data);
  34 /** Deallocates TOHOST MIF interrupt bits */
  35 int mifintrbit_free_tohost(struct mifintrbit *intr, int which_bit);
  36 /* Get an interrupt bit associated with the target (R4/M4) -FROMHOST direction
  37  * Function returns the IRQ bit associated , -EIO if error */
  38 int mifintrbit_alloc_fromhost(struct mifintrbit *intr, enum scsc_mif_abs_target target);
  39 /* Free an interrupt bit associated with the target (R4/M4) -FROMHOST direction
  40  * Function returns the 0 if succedes , -EIO if error */
  41 int mifintrbit_free_fromhost(struct mifintrbit *intr, int which_bit, enum scsc_mif_abs_target target);
  42
  43
  44 struct mifintrbit {
  45         void(*mifintrbit_irq_handler[MIFINTRBIT_NUM_INT]) (int irq, void *data);
  46         void                *irq_data[MIFINTRBIT_NUM_INT];
  47         struct scsc_mif_abs *mif;
  48         /* Use spinlock is it may be in IRQ context */
  49         spinlock_t          spinlock;
  50         /* Interrupt allocation bitmaps */
  51         DECLARE_BITMAP(bitmap_tohost, MIFINTRBIT_NUM_INT);
  52         DECLARE_BITMAP(bitmap_fromhost_r4, MIFINTRBIT_NUM_INT);
  53         DECLARE_BITMAP(bitmap_fromhost_m4, MIFINTRBIT_NUM_INT);
  54 #ifdef CONFIG_SCSC_MX450_GDB_SUPPORT
  55         DECLARE_BITMAP(bitmap_fromhost_m4_1, MIFINTRBIT_NUM_INT);
  56 #endif
  57 };
  58
  59
  60 #endif