f9a376c3f6
Some cards have a so-called low-latency mode, in which they present a single multichannel stream with no mixing or samplerate conversion. In this mode the card can generate an interrupt per internal processing block (typically 32 or 64 frames) Signed-off-by: Eliot Blennerhassett <eliot@blennerhassett.gen.nz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/**
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AudioScience HPI driver
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Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation;
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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struct hpi_adapter_obj;
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/* a function that takes an adapter obj and returns an int */
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typedef int adapter_int_func(struct hpi_adapter_obj *pao, u32 message);
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#define HPI_IRQ_NONE (0)
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#define HPI_IRQ_MESSAGE (1)
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#define HPI_IRQ_MIXER (2)
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struct hpi_adapter_obj {
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struct hpi_pci pci; /* PCI info - bus#,dev#,address etc */
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u16 type; /* 0x6644 == ASI6644 etc */
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u16 index;
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struct hpios_spinlock dsp_lock;
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u16 dsp_crashed;
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u16 has_control_cache;
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void *priv;
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adapter_int_func *irq_query_and_clear;
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struct hpi_hostbuffer_status *instream_host_buffer_status;
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struct hpi_hostbuffer_status *outstream_host_buffer_status;
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};
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struct hpi_control_cache {
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/** indicates whether the structures are initialized */
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u16 init;
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u16 adap_idx;
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u32 control_count;
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u32 cache_size_in_bytes;
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/** pointer to allocated memory of lookup pointers. */
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struct hpi_control_cache_info **p_info;
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/** pointer to DSP's control cache. */
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u8 *p_cache;
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};
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struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index);
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u16 hpi_add_adapter(struct hpi_adapter_obj *pao);
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void hpi_delete_adapter(struct hpi_adapter_obj *pao);
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short hpi_check_control_cache(struct hpi_control_cache *pC,
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struct hpi_message *phm, struct hpi_response *phr);
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short hpi_check_control_cache_single(struct hpi_control_cache_single *pC,
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struct hpi_message *phm, struct hpi_response *phr);
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struct hpi_control_cache *hpi_alloc_control_cache(const u32
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number_of_controls, const u32 size_in_bytes, u8 *pDSP_control_buffer);
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void hpi_free_control_cache(struct hpi_control_cache *p_cache);
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void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *pC,
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struct hpi_message *phm, struct hpi_response *phr);
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void hpi_cmn_control_cache_sync_to_msg_single(struct hpi_control_cache_single
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*pC, struct hpi_message *phm, struct hpi_response *phr);
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u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr);
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hpi_handler_func HPI_COMMON;
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