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