acp_hw.c (1724B)
1/* 2 * Copyright 2015 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * 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 0 33#define ACP_MODE_AZ 1 34 35#define mmACP_AZALIA_I2S_SELECT 0x51d4 36 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}