1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * AMD ALSA SoC PDM Driver
4 *
5 * Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
6 */
7
8#include "acp6x_chip_offset_byte.h"
9
10#define ACP_DEVICE_ID 0x15E2
11#define ACP6x_PHY_BASE_ADDRESS 0x1240000
12#define ACP6x_REG_START 0x1240000
13#define ACP6x_REG_END 0x1250200
14#define ACP6x_DEVS 3
15#define ACP6x_PDM_MODE 1
16
17#define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK 0x00010001
18#define ACP_PGFSM_CNTL_POWER_ON_MASK 1
19#define ACP_PGFSM_CNTL_POWER_OFF_MASK 0
20#define ACP_PGFSM_STATUS_MASK 3
21#define ACP_POWERED_ON 0
22#define ACP_POWER_ON_IN_PROGRESS 1
23#define ACP_POWERED_OFF 2
24#define ACP_POWER_OFF_IN_PROGRESS 3
25
26#define ACP_ERROR_MASK 0x20000000
27#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
28#define PDM_DMA_STAT 0x10
29
30#define PDM_DMA_INTR_MASK 0x10000
31#define ACP_ERROR_STAT 29
32#define PDM_DECIMATION_FACTOR 2
33#define ACP_PDM_CLK_FREQ_MASK 7
34#define ACP_WOV_GAIN_CONTROL GENMASK(4, 3)
35#define ACP_PDM_ENABLE 1
36#define ACP_PDM_DISABLE 0
37#define ACP_PDM_DMA_EN_STATUS 2
38#define TWO_CH 2
39#define DELAY_US 5
40#define ACP_COUNTER 20000
41
42#define ACP_SRAM_PTE_OFFSET 0x03800000
43#define PAGE_SIZE_4K_ENABLE 2
44#define PDM_PTE_OFFSET 0
45#define PDM_MEM_WINDOW_START 0x4000000
46
47#define CAPTURE_MIN_NUM_PERIODS 4
48#define CAPTURE_MAX_NUM_PERIODS 4
49#define CAPTURE_MAX_PERIOD_SIZE 8192
50#define CAPTURE_MIN_PERIOD_SIZE 4096
51
52#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
53#define MIN_BUFFER MAX_BUFFER
54
55/* time in ms for runtime suspend delay */
56#define ACP_SUSPEND_DELAY_MS 2000
57
58enum acp_config {
59 ACP_CONFIG_0 = 0,
60 ACP_CONFIG_1,
61 ACP_CONFIG_2,
62 ACP_CONFIG_3,
63 ACP_CONFIG_4,
64 ACP_CONFIG_5,
65 ACP_CONFIG_6,
66 ACP_CONFIG_7,
67 ACP_CONFIG_8,
68 ACP_CONFIG_9,
69 ACP_CONFIG_10,
70 ACP_CONFIG_11,
71 ACP_CONFIG_12,
72 ACP_CONFIG_13,
73 ACP_CONFIG_14,
74 ACP_CONFIG_15,
75};
76
77struct pdm_dev_data {
78 u32 pdm_irq;
79 void __iomem *acp6x_base;
80 struct snd_pcm_substream *capture_stream;
81};
82
83struct pdm_stream_instance {
84 u16 num_pages;
85 u16 channels;
86 dma_addr_t dma_addr;
87 u64 bytescount;
88 void __iomem *acp6x_base;
89};
90
91union acp_pdm_dma_count {
92 struct {
93 u32 low;
94 u32 high;
95 } bcount;
96 u64 bytescount;
97};
98
99static inline u32 acp6x_readl(void __iomem *base_addr)
100{
101 return readl(addr: base_addr - ACP6x_PHY_BASE_ADDRESS);
102}
103
104static inline void acp6x_writel(u32 val, void __iomem *base_addr)
105{
106 writel(val, addr: base_addr - ACP6x_PHY_BASE_ADDRESS);
107}
108
109int snd_amd_acp_find_config(struct pci_dev *pci);
110
111

source code of linux/sound/soc/amd/yc/acp6x.h