51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/*
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* Copyright 2015 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include "acp_gfx_if.h"
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#define ACP_MODE_I2S 0
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#define ACP_MODE_AZ 1
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#define mmACP_AZALIA_I2S_SELECT 0x51d4
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int amd_acp_hw_init(struct cgs_device *cgs_device,
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unsigned acp_version_major, unsigned acp_version_minor)
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{
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unsigned int acp_mode = ACP_MODE_I2S;
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if ((acp_version_major == 2) && (acp_version_minor == 2))
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acp_mode = cgs_read_register(cgs_device,
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mmACP_AZALIA_I2S_SELECT);
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if (acp_mode != ACP_MODE_I2S)
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return -ENODEV;
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return 0;
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}
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