arm64: dts: qcom: sm8550: add TRNG node
[linux-modified.git] / sound / soc / meson / aiu-fifo-i2s.c
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/bitfield.h>
7 #include <linux/clk.h>
8 #include <sound/pcm_params.h>
9 #include <sound/soc.h>
10 #include <sound/soc-dai.h>
11
12 #include "aiu.h"
13 #include "aiu-fifo.h"
14
15 #define AIU_I2S_SOURCE_DESC_MODE_8CH    BIT(0)
16 #define AIU_I2S_SOURCE_DESC_MODE_24BIT  BIT(5)
17 #define AIU_I2S_SOURCE_DESC_MODE_32BIT  BIT(9)
18 #define AIU_I2S_SOURCE_DESC_MODE_SPLIT  BIT(11)
19 #define AIU_MEM_I2S_MASKS_IRQ_BLOCK     GENMASK(31, 16)
20 #define AIU_MEM_I2S_CONTROL_MODE_16BIT  BIT(6)
21 #define AIU_MEM_I2S_BUF_CNTL_INIT       BIT(0)
22 #define AIU_RST_SOFT_I2S_FAST           BIT(0)
23 #define AIU_I2S_MISC_HOLD_EN            BIT(2)
24 #define AIU_I2S_MISC_FORCE_LEFT_RIGHT   BIT(4)
25
26 #define AIU_FIFO_I2S_BLOCK              256
27
28 static struct snd_pcm_hardware fifo_i2s_pcm = {
29         .info = (SNDRV_PCM_INFO_INTERLEAVED |
30                  SNDRV_PCM_INFO_MMAP |
31                  SNDRV_PCM_INFO_MMAP_VALID |
32                  SNDRV_PCM_INFO_PAUSE),
33         .formats = AIU_FORMATS,
34         .rate_min = 5512,
35         .rate_max = 192000,
36         .channels_min = 2,
37         .channels_max = 8,
38         .period_bytes_min = AIU_FIFO_I2S_BLOCK,
39         .period_bytes_max = AIU_FIFO_I2S_BLOCK * USHRT_MAX,
40         .periods_min = 2,
41         .periods_max = UINT_MAX,
42
43         /* No real justification for this */
44         .buffer_bytes_max = 1 * 1024 * 1024,
45 };
46
47 static int aiu_fifo_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
48                                 struct snd_soc_dai *dai)
49 {
50         struct snd_soc_component *component = dai->component;
51
52         switch (cmd) {
53         case SNDRV_PCM_TRIGGER_START:
54         case SNDRV_PCM_TRIGGER_RESUME:
55         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
56                 snd_soc_component_write(component, AIU_RST_SOFT,
57                                         AIU_RST_SOFT_I2S_FAST);
58                 snd_soc_component_read(component, AIU_I2S_SYNC);
59                 break;
60         }
61
62         return aiu_fifo_trigger(substream, cmd, dai);
63 }
64
65 static int aiu_fifo_i2s_prepare(struct snd_pcm_substream *substream,
66                                 struct snd_soc_dai *dai)
67 {
68         struct snd_soc_component *component = dai->component;
69         int ret;
70
71         ret = aiu_fifo_prepare(substream, dai);
72         if (ret)
73                 return ret;
74
75         snd_soc_component_update_bits(component,
76                                       AIU_MEM_I2S_BUF_CNTL,
77                                       AIU_MEM_I2S_BUF_CNTL_INIT,
78                                       AIU_MEM_I2S_BUF_CNTL_INIT);
79         snd_soc_component_update_bits(component,
80                                       AIU_MEM_I2S_BUF_CNTL,
81                                       AIU_MEM_I2S_BUF_CNTL_INIT, 0);
82
83         return 0;
84 }
85
86 static int aiu_fifo_i2s_hw_params(struct snd_pcm_substream *substream,
87                                   struct snd_pcm_hw_params *params,
88                                   struct snd_soc_dai *dai)
89 {
90         struct snd_soc_component *component = dai->component;
91         struct aiu_fifo *fifo = snd_soc_dai_dma_data_get_playback(dai);
92         unsigned int val;
93         int ret;
94
95         snd_soc_component_update_bits(component, AIU_I2S_MISC,
96                                       AIU_I2S_MISC_HOLD_EN,
97                                       AIU_I2S_MISC_HOLD_EN);
98
99         ret = aiu_fifo_hw_params(substream, params, dai);
100         if (ret)
101                 return ret;
102
103         switch (params_physical_width(params)) {
104         case 16:
105                 val = AIU_MEM_I2S_CONTROL_MODE_16BIT;
106                 break;
107         case 32:
108                 val = 0;
109                 break;
110         default:
111                 dev_err(dai->dev, "Unsupported physical width %u\n",
112                         params_physical_width(params));
113                 return -EINVAL;
114         }
115
116         snd_soc_component_update_bits(component, AIU_MEM_I2S_CONTROL,
117                                       AIU_MEM_I2S_CONTROL_MODE_16BIT,
118                                       val);
119
120         /* Setup the irq periodicity */
121         val = params_period_bytes(params) / fifo->fifo_block;
122         val = FIELD_PREP(AIU_MEM_I2S_MASKS_IRQ_BLOCK, val);
123         snd_soc_component_update_bits(component, AIU_MEM_I2S_MASKS,
124                                       AIU_MEM_I2S_MASKS_IRQ_BLOCK, val);
125
126         /*
127          * Most (all?) supported SoCs have this bit set by default. The vendor
128          * driver however sets it manually (depending on the version either
129          * while un-setting AIU_I2S_MISC_HOLD_EN or right before that). Follow
130          * the same approach for consistency with the vendor driver.
131          */
132         snd_soc_component_update_bits(component, AIU_I2S_MISC,
133                                       AIU_I2S_MISC_FORCE_LEFT_RIGHT,
134                                       AIU_I2S_MISC_FORCE_LEFT_RIGHT);
135
136         snd_soc_component_update_bits(component, AIU_I2S_MISC,
137                                       AIU_I2S_MISC_HOLD_EN, 0);
138
139         return 0;
140 }
141
142 const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops = {
143         .pcm_new        = aiu_fifo_pcm_new,
144         .probe          = aiu_fifo_i2s_dai_probe,
145         .remove         = aiu_fifo_dai_remove,
146         .trigger        = aiu_fifo_i2s_trigger,
147         .prepare        = aiu_fifo_i2s_prepare,
148         .hw_params      = aiu_fifo_i2s_hw_params,
149         .startup        = aiu_fifo_startup,
150         .shutdown       = aiu_fifo_shutdown,
151 };
152
153 int aiu_fifo_i2s_dai_probe(struct snd_soc_dai *dai)
154 {
155         struct snd_soc_component *component = dai->component;
156         struct aiu *aiu = snd_soc_component_get_drvdata(component);
157         struct aiu_fifo *fifo;
158         int ret;
159
160         ret = aiu_fifo_dai_probe(dai);
161         if (ret)
162                 return ret;
163
164         fifo = snd_soc_dai_dma_data_get_playback(dai);
165
166         fifo->pcm = &fifo_i2s_pcm;
167         fifo->mem_offset = AIU_MEM_I2S_START;
168         fifo->fifo_block = AIU_FIFO_I2S_BLOCK;
169         fifo->pclk = aiu->i2s.clks[PCLK].clk;
170         fifo->irq = aiu->i2s.irq;
171
172         return 0;
173 }