1a8fe58ceSMaruthi Bayyavarapu /* 2a8fe58ceSMaruthi Bayyavarapu * Copyright 2015 Advanced Micro Devices, Inc. 3a8fe58ceSMaruthi Bayyavarapu * 4a8fe58ceSMaruthi Bayyavarapu * Permission is hereby granted, free of charge, to any person obtaining a 5a8fe58ceSMaruthi Bayyavarapu * copy of this software and associated documentation files (the "Software"), 6a8fe58ceSMaruthi Bayyavarapu * to deal in the Software without restriction, including without limitation 7a8fe58ceSMaruthi Bayyavarapu * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8a8fe58ceSMaruthi Bayyavarapu * and/or sell copies of the Software, and to permit persons to whom the 9a8fe58ceSMaruthi Bayyavarapu * Software is furnished to do so, subject to the following conditions: 10a8fe58ceSMaruthi Bayyavarapu * 11a8fe58ceSMaruthi Bayyavarapu * The above copyright notice and this permission notice shall be included in 12a8fe58ceSMaruthi Bayyavarapu * all copies or substantial portions of the Software. 13a8fe58ceSMaruthi Bayyavarapu * 14a8fe58ceSMaruthi Bayyavarapu * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15a8fe58ceSMaruthi Bayyavarapu * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16a8fe58ceSMaruthi Bayyavarapu * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17a8fe58ceSMaruthi Bayyavarapu * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18a8fe58ceSMaruthi Bayyavarapu * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19a8fe58ceSMaruthi Bayyavarapu * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20a8fe58ceSMaruthi Bayyavarapu * OTHER DEALINGS IN THE SOFTWARE. 21a8fe58ceSMaruthi Bayyavarapu * 22a8fe58ceSMaruthi Bayyavarapu */ 23a8fe58ceSMaruthi Bayyavarapu 24a8fe58ceSMaruthi Bayyavarapu #include <linux/mm.h> 25a8fe58ceSMaruthi Bayyavarapu #include <linux/slab.h> 26a8fe58ceSMaruthi Bayyavarapu #include <linux/device.h> 27a8fe58ceSMaruthi Bayyavarapu #include <linux/delay.h> 28a8fe58ceSMaruthi Bayyavarapu #include <linux/errno.h> 29a8fe58ceSMaruthi Bayyavarapu 30a8fe58ceSMaruthi Bayyavarapu #include "acp_gfx_if.h" 31a8fe58ceSMaruthi Bayyavarapu 32a8fe58ceSMaruthi Bayyavarapu #define ACP_MODE_I2S 0 33a8fe58ceSMaruthi Bayyavarapu #define ACP_MODE_AZ 1 34a8fe58ceSMaruthi Bayyavarapu 35a8fe58ceSMaruthi Bayyavarapu #define mmACP_AZALIA_I2S_SELECT 0x51d4 36a8fe58ceSMaruthi Bayyavarapu 37a8fe58ceSMaruthi Bayyavarapu int amd_acp_hw_init(void *cgs_device, 38a8fe58ceSMaruthi Bayyavarapu unsigned acp_version_major, unsigned acp_version_minor) 39a8fe58ceSMaruthi Bayyavarapu { 40a8fe58ceSMaruthi Bayyavarapu unsigned int acp_mode = ACP_MODE_I2S; 41a8fe58ceSMaruthi Bayyavarapu 42a8fe58ceSMaruthi Bayyavarapu if ((acp_version_major == 2) && (acp_version_minor == 2)) 43a8fe58ceSMaruthi Bayyavarapu acp_mode = cgs_read_register(cgs_device, 44a8fe58ceSMaruthi Bayyavarapu mmACP_AZALIA_I2S_SELECT); 45a8fe58ceSMaruthi Bayyavarapu 46a8fe58ceSMaruthi Bayyavarapu if (acp_mode != ACP_MODE_I2S) 47a8fe58ceSMaruthi Bayyavarapu return -ENODEV; 48a8fe58ceSMaruthi Bayyavarapu 49a8fe58ceSMaruthi Bayyavarapu return 0; 50a8fe58ceSMaruthi Bayyavarapu } 51