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1/*2 * Copyright 2015 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 */23 24#include <linux/mm.h>25#include <linux/slab.h>26#include <linux/device.h>27#include <linux/delay.h>28#include <linux/errno.h>29 30#include "acp_gfx_if.h"31 32#define ACP_MODE_I2S 033#define ACP_MODE_AZ 134 35#define mmACP_AZALIA_I2S_SELECT 0x51d436 37int amd_acp_hw_init(struct cgs_device *cgs_device,38 unsigned acp_version_major, unsigned acp_version_minor)39{40 unsigned int acp_mode = ACP_MODE_I2S;41 42 if ((acp_version_major == 2) && (acp_version_minor == 2))43 acp_mode = cgs_read_register(cgs_device,44 mmACP_AZALIA_I2S_SELECT);45 46 if (acp_mode != ACP_MODE_I2S)47 return -ENODEV;48 49 return 0;50}51