drivers/staging/tidspbridge/include/dspbridge/wdt.h

   1 /*
   2  * wdt.h
   3  *
   4  * DSP-BIOS Bridge driver support functions for TI OMAP processors.
   5  *
   6  * IO dispatcher for a shared memory channel driver.
   7  *
   8  * Copyright (C) 2010 Texas Instruments, Inc.
   9  *
  10  * This package is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  16  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  17  */
  18 #ifndef __DSP_WDT3_H_
  19 #define __DSP_WDT3_H_
  20
  21 /* WDT defines */
  22 #define OMAP3_WDT3_ISR_OFFSET   0x0018
  23
  24
  25 /**
  26  * struct dsp_wdt_setting - the basic dsp_wdt_setting structure
  27  * @reg_base:   pointer to the base of the wdt registers
  28  * @sm_wdt:     pointer to flags in shared memory
  29  * @wdt3_tasklet        tasklet to manage wdt event
  30  * @fclk                handle to wdt3 functional clock
  31  * @iclk                handle to wdt3 interface clock
  32  *
  33  * This struct is used in the function to manage wdt3.
  34  */
  35
  36 struct dsp_wdt_setting {
  37         void __iomem *reg_base;
  38         struct shm *sm_wdt;
  39         struct tasklet_struct wdt3_tasklet;
  40         struct clk *fclk;
  41         struct clk *iclk;
  42 };
  43
  44 /**
  45  * dsp_wdt_init() - initialize wdt3 module.
  46  *
  47  * This function initilize to wdt3 module, so that
  48  * other wdt3 function can be used.
  49  */
  50 int dsp_wdt_init(void);
  51
  52 /**
  53  * dsp_wdt_exit() - initialize wdt3 module.
  54  *
  55  * This function frees all resources allocated for wdt3 module.
  56  */
  57 void dsp_wdt_exit(void);
  58
  59 /**
  60  * dsp_wdt_enable() - enable/disable wdt3
  61  * @enable:     bool value to enable/disable wdt3
  62  *
  63  * This function enables or disables wdt3 base on @enable value.
  64  *
  65  */
  66 void dsp_wdt_enable(bool enable);
  67
  68 /**
  69  * dsp_wdt_sm_set() - store pointer to the share memory
  70  * @data:               pointer to dspbridge share memory
  71  *
  72  * This function is used to pass a valid pointer to share memory,
  73  * so that the flags can be set in order DSP side can read them.
  74  *
  75  */
  76 void dsp_wdt_sm_set(void *data);
  77
  78 #endif
  79