1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * AMD ALSA SoC PDM Driver
4 *
5 * Copyright (C) 2022 Advanced Micro Devices, Inc. All rights reserved.
6 */
7
8 #include <sound/acp63_chip_offset_byte.h>
9
10 #define ACP_DEVICE_ID 0x15E2
11 #define ACP6x_REG_START 0x1240000
12 #define ACP6x_REG_END 0x1250200
13 #define ACP6x_DEVS 3
14 #define ACP6x_PDM_MODE 1
15
16 #define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK 0x00010001
17 #define ACP_PGFSM_CNTL_POWER_ON_MASK 1
18 #define ACP_PGFSM_CNTL_POWER_OFF_MASK 0
19 #define ACP_PGFSM_STATUS_MASK 3
20 #define ACP_POWERED_ON 0
21 #define ACP_POWER_ON_IN_PROGRESS 1
22 #define ACP_POWERED_OFF 2
23 #define ACP_POWER_OFF_IN_PROGRESS 3
24
25 #define ACP_ERROR_MASK 0x20000000
26 #define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
27 #define PDM_DMA_STAT 0x10
28
29 #define PDM_DMA_INTR_MASK 0x10000
30 #define ACP_ERROR_STAT 29
31 #define PDM_DECIMATION_FACTOR 2
32 #define ACP_PDM_CLK_FREQ_MASK 7
33 #define ACP_WOV_MISC_CTRL_MASK 0x10
34 #define ACP_PDM_ENABLE 1
35 #define ACP_PDM_DISABLE 0
36 #define ACP_PDM_DMA_EN_STATUS 2
37 #define TWO_CH 2
38 #define DELAY_US 5
39 #define ACP_COUNTER 20000
40
41 #define ACP_SRAM_PTE_OFFSET 0x03800000
42 #define PAGE_SIZE_4K_ENABLE 2
43 #define PDM_PTE_OFFSET 0
44 #define PDM_MEM_WINDOW_START 0x4000000
45
46 #define CAPTURE_MIN_NUM_PERIODS 4
47 #define CAPTURE_MAX_NUM_PERIODS 4
48 #define CAPTURE_MAX_PERIOD_SIZE 8192
49 #define CAPTURE_MIN_PERIOD_SIZE 4096
50
51 #define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
52 #define MIN_BUFFER MAX_BUFFER
53
54 /* time in ms for runtime suspend delay */
55 #define ACP_SUSPEND_DELAY_MS 2000
56
57 enum acp_config {
58 ACP_CONFIG_0 = 0,
59 ACP_CONFIG_1,
60 ACP_CONFIG_2,
61 ACP_CONFIG_3,
62 ACP_CONFIG_4,
63 ACP_CONFIG_5,
64 ACP_CONFIG_6,
65 ACP_CONFIG_7,
66 ACP_CONFIG_8,
67 ACP_CONFIG_9,
68 ACP_CONFIG_10,
69 ACP_CONFIG_11,
70 ACP_CONFIG_12,
71 ACP_CONFIG_13,
72 ACP_CONFIG_14,
73 ACP_CONFIG_15,
74 };
75
76 struct pdm_stream_instance {
77 u16 num_pages;
78 u16 channels;
79 dma_addr_t dma_addr;
80 u64 bytescount;
81 void __iomem *acp63_base;
82 };
83
84 struct pdm_dev_data {
85 u32 pdm_irq;
86 void __iomem *acp63_base;
87 struct snd_pcm_substream *capture_stream;
88 };
89
acp63_readl(void __iomem * base_addr)90 static inline u32 acp63_readl(void __iomem *base_addr)
91 {
92 return readl(base_addr);
93 }
94
acp63_writel(u32 val,void __iomem * base_addr)95 static inline void acp63_writel(u32 val, void __iomem *base_addr)
96 {
97 writel(val, base_addr);
98 }
99