1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Analog Devices ADV7511 HDMI transmitter driver
4 *
5 * Copyright 2012 Analog Devices Inc.
6 * Copyright (c) 2016, Linaro Limited
7 */
8
9 #include <sound/core.h>
10 #include <sound/hdmi-codec.h>
11 #include <sound/pcm.h>
12 #include <sound/soc.h>
13 #include <linux/of_graph.h>
14
15 #include "adv7511.h"
16
adv7511_calc_cts_n(unsigned int f_tmds,unsigned int fs,unsigned int * cts,unsigned int * n)17 static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
18 unsigned int *cts, unsigned int *n)
19 {
20 switch (fs) {
21 case 32000:
22 *n = 4096;
23 break;
24 case 44100:
25 *n = 6272;
26 break;
27 case 48000:
28 *n = 6144;
29 break;
30 }
31
32 *cts = ((f_tmds * *n) / (128 * fs)) * 1000;
33 }
34
adv7511_update_cts_n(struct adv7511 * adv7511)35 static int adv7511_update_cts_n(struct adv7511 *adv7511)
36 {
37 unsigned int cts = 0;
38 unsigned int n = 0;
39
40 adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
41
42 regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
43 regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
44 regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
45
46 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
47 (cts >> 16) & 0xf);
48 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
49 (cts >> 8) & 0xff);
50 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
51 cts & 0xff);
52
53 return 0;
54 }
55
adv7511_hdmi_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * fmt,struct hdmi_codec_params * hparms)56 int adv7511_hdmi_hw_params(struct device *dev, void *data,
57 struct hdmi_codec_daifmt *fmt,
58 struct hdmi_codec_params *hparms)
59 {
60 struct adv7511 *adv7511 = dev_get_drvdata(dev);
61 unsigned int audio_source, i2s_format = 0;
62 unsigned int invert_clock;
63 unsigned int rate;
64 unsigned int len;
65
66 switch (hparms->sample_rate) {
67 case 32000:
68 rate = ADV7511_SAMPLE_FREQ_32000;
69 break;
70 case 44100:
71 rate = ADV7511_SAMPLE_FREQ_44100;
72 break;
73 case 48000:
74 rate = ADV7511_SAMPLE_FREQ_48000;
75 break;
76 case 88200:
77 rate = ADV7511_SAMPLE_FREQ_88200;
78 break;
79 case 96000:
80 rate = ADV7511_SAMPLE_FREQ_96000;
81 break;
82 case 176400:
83 rate = ADV7511_SAMPLE_FREQ_176400;
84 break;
85 case 192000:
86 rate = ADV7511_SAMPLE_FREQ_192000;
87 break;
88 default:
89 return -EINVAL;
90 }
91
92 switch (hparms->sample_width) {
93 case 16:
94 len = ADV7511_I2S_SAMPLE_LEN_16;
95 break;
96 case 18:
97 len = ADV7511_I2S_SAMPLE_LEN_18;
98 break;
99 case 20:
100 len = ADV7511_I2S_SAMPLE_LEN_20;
101 break;
102 case 24:
103 len = ADV7511_I2S_SAMPLE_LEN_24;
104 break;
105 default:
106 return -EINVAL;
107 }
108
109 switch (fmt->fmt) {
110 case HDMI_I2S:
111 audio_source = ADV7511_AUDIO_SOURCE_I2S;
112 i2s_format = ADV7511_I2S_FORMAT_I2S;
113 break;
114 case HDMI_RIGHT_J:
115 audio_source = ADV7511_AUDIO_SOURCE_I2S;
116 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
117 break;
118 case HDMI_LEFT_J:
119 audio_source = ADV7511_AUDIO_SOURCE_I2S;
120 i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 invert_clock = fmt->bit_clk_inv;
127
128 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
129 audio_source << 4);
130 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
131 invert_clock << 6);
132 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
133 i2s_format);
134
135 adv7511->audio_source = audio_source;
136
137 adv7511->f_audio = hparms->sample_rate;
138
139 adv7511_update_cts_n(adv7511);
140
141 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
142 ADV7511_AUDIO_CFG3_LEN_MASK, len);
143 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
144 ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
145 regmap_write(adv7511->regmap, 0x73, 0x1);
146
147 return 0;
148 }
149
audio_startup(struct device * dev,void * data)150 static int audio_startup(struct device *dev, void *data)
151 {
152 struct adv7511 *adv7511 = dev_get_drvdata(dev);
153
154 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
155 BIT(7), 0);
156
157 /* hide Audio infoframe updates */
158 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
159 BIT(5), BIT(5));
160 /* enable N/CTS, enable Audio sample packets */
161 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
162 BIT(5), BIT(5));
163 /* enable N/CTS */
164 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
165 BIT(6), BIT(6));
166 /* not copyrighted */
167 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
168 BIT(5), BIT(5));
169 /* enable audio infoframes */
170 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
171 BIT(3), BIT(3));
172 /* AV mute disable */
173 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
174 BIT(7) | BIT(6), BIT(7));
175 /* use Audio infoframe updated info */
176 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
177 BIT(5), 0);
178 return 0;
179 }
180
audio_shutdown(struct device * dev,void * data)181 static void audio_shutdown(struct device *dev, void *data)
182 {
183 }
184
adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component * component,struct device_node * endpoint)185 static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
186 struct device_node *endpoint)
187 {
188 struct of_endpoint of_ep;
189 int ret;
190
191 ret = of_graph_parse_endpoint(endpoint, &of_ep);
192 if (ret < 0)
193 return ret;
194
195 /*
196 * HDMI sound should be located as reg = <2>
197 * Then, it is sound port 0
198 */
199 if (of_ep.port == 2)
200 return 0;
201
202 return -EINVAL;
203 }
204
205 static const struct hdmi_codec_ops adv7511_codec_ops = {
206 .hw_params = adv7511_hdmi_hw_params,
207 .audio_shutdown = audio_shutdown,
208 .audio_startup = audio_startup,
209 .get_dai_id = adv7511_hdmi_i2s_get_dai_id,
210 };
211
212 static const struct hdmi_codec_pdata codec_data = {
213 .ops = &adv7511_codec_ops,
214 .max_i2s_channels = 2,
215 .i2s = 1,
216 };
217
adv7511_audio_init(struct device * dev,struct adv7511 * adv7511)218 int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
219 {
220 adv7511->audio_pdev = platform_device_register_data(dev,
221 HDMI_CODEC_DRV_NAME,
222 PLATFORM_DEVID_AUTO,
223 &codec_data,
224 sizeof(codec_data));
225 return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
226 }
227
adv7511_audio_exit(struct adv7511 * adv7511)228 void adv7511_audio_exit(struct adv7511 *adv7511)
229 {
230 if (adv7511->audio_pdev) {
231 platform_device_unregister(adv7511->audio_pdev);
232 adv7511->audio_pdev = NULL;
233 }
234 }
235
