text: /**
  
      AudioScience HPI driver
      Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>
  
      This program is free software; you can redistribute it and/or modify
      it under the terms of version 2 of the GNU General Public License as
      published by the Free Software Foundation;
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  
  */
  
  struct hpi_adapter_obj;
  
  /* a function that takes an adapter obj and returns an int */
  typedef int adapter_int_func(struct hpi_adapter_obj *pao, u32 message);
  
  #define HPI_IRQ_NONE		(0)
  #define HPI_IRQ_MESSAGE		(1)
  #define HPI_IRQ_MIXER		(2)
  
  struct hpi_adapter_obj {
  	struct hpi_pci pci;	/* PCI info - bus#,dev#,address etc */
  	u16 type;		/* 0x6644 == ASI6644 etc */
  	u16 index;
  
  	struct hpios_spinlock dsp_lock;
  
  	u16 dsp_crashed;
  	u16 has_control_cache;
  	void *priv;
  	adapter_int_func *irq_query_and_clear;
  	struct hpi_hostbuffer_status *instream_host_buffer_status;
  	struct hpi_hostbuffer_status *outstream_host_buffer_status;
  };
  
  struct hpi_control_cache {
  	/** indicates whether the structures are initialized */
  	u16 init;
  	u16 adap_idx;
  	u32 control_count;
  	u32 cache_size_in_bytes;
  	/** pointer to allocated memory of lookup pointers. */
  	struct hpi_control_cache_info **p_info;
  	/** pointer to DSP's control cache. */
  	u8 *p_cache;
  };
  
  struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index);
  
  u16 hpi_add_adapter(struct hpi_adapter_obj *pao);
  
  void hpi_delete_adapter(struct hpi_adapter_obj *pao);
  
  short hpi_check_control_cache(struct hpi_control_cache *pC,
  	struct hpi_message *phm, struct hpi_response *phr);
  
  short hpi_check_control_cache_single(struct hpi_control_cache_single *pC,
  	struct hpi_message *phm, struct hpi_response *phr);
  
  struct hpi_control_cache *hpi_alloc_control_cache(const u32
  	number_of_controls, const u32 size_in_bytes, u8 *pDSP_control_buffer);
  
  void hpi_free_control_cache(struct hpi_control_cache *p_cache);
  
  void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *pC,
  	struct hpi_message *phm, struct hpi_response *phr);
  
  void hpi_cmn_control_cache_sync_to_msg_single(struct hpi_control_cache_single
  	*pC, struct hpi_message *phm, struct hpi_response *phr);
  
  u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr);
  
  hpi_handler_func HPI_COMMON;
  