1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // eukrea-tlv320.c -- SoC audio for eukrea_cpuimxXX in I2S mode
4 //
5 // Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
6 //
7 // based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
8 // which is Copyright 2009 Simtec Electronics
9 // and on sound/soc/imx/phycore-ac97.c which is
10 // Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
11
12 #include <linux/errno.h>
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/of.h>
16 #include <linux/of_platform.h>
17 #include <linux/device.h>
18 #include <linux/i2c.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/soc.h>
22 #include <asm/mach-types.h>
23
24 #include "../codecs/tlv320aic23.h"
25 #include "imx-ssi.h"
26 #include "imx-audmux.h"
27
28 #define CODEC_CLOCK 12000000
29
eukrea_tlv320_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)30 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
31 struct snd_pcm_hw_params *params)
32 {
33 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
34 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
35 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
36 int ret;
37
38 ret = snd_soc_dai_set_sysclk(codec_dai, 0,
39 CODEC_CLOCK, SND_SOC_CLOCK_OUT);
40 if (ret) {
41 dev_err(cpu_dai->dev,
42 "Failed to set the codec sysclk.\n");
43 return ret;
44 }
45
46 snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 0);
47
48 ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
49 SND_SOC_CLOCK_IN);
50 /* fsl_ssi lacks the set_sysclk ops */
51 if (ret && ret != -EINVAL) {
52 dev_err(cpu_dai->dev,
53 "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
54 return ret;
55 }
56
57 return 0;
58 }
59
60 static const struct snd_soc_ops eukrea_tlv320_snd_ops = {
61 .hw_params = eukrea_tlv320_hw_params,
62 };
63
64 SND_SOC_DAILINK_DEFS(hifi,
65 DAILINK_COMP_ARRAY(COMP_EMPTY()),
66 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic23-hifi")),
67 DAILINK_COMP_ARRAY(COMP_EMPTY()));
68
69 static struct snd_soc_dai_link eukrea_tlv320_dai = {
70 .name = "tlv320aic23",
71 .stream_name = "TLV320AIC23",
72 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
73 SND_SOC_DAIFMT_CBP_CFP,
74 .ops = &eukrea_tlv320_snd_ops,
75 SND_SOC_DAILINK_REG(hifi),
76 };
77
78 static struct snd_soc_card eukrea_tlv320 = {
79 .owner = THIS_MODULE,
80 .dai_link = &eukrea_tlv320_dai,
81 .num_links = 1,
82 };
83
eukrea_tlv320_probe(struct platform_device * pdev)84 static int eukrea_tlv320_probe(struct platform_device *pdev)
85 {
86 int ret;
87 int int_port = 0, ext_port;
88 struct device_node *np = pdev->dev.of_node;
89 struct device_node *ssi_np = NULL, *codec_np = NULL, *tmp_np = NULL;
90
91 eukrea_tlv320.dev = &pdev->dev;
92 if (np) {
93 ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
94 "eukrea,model");
95 if (ret) {
96 dev_err(&pdev->dev,
97 "eukrea,model node missing or invalid.\n");
98 goto err;
99 }
100
101 ssi_np = of_parse_phandle(pdev->dev.of_node,
102 "ssi-controller", 0);
103 if (!ssi_np) {
104 dev_err(&pdev->dev,
105 "ssi-controller missing or invalid.\n");
106 ret = -ENODEV;
107 goto err;
108 }
109
110 codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
111 if (codec_np)
112 eukrea_tlv320_dai.codecs->of_node = codec_np;
113 else
114 dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
115
116 ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
117 if (ret) {
118 dev_err(&pdev->dev,
119 "fsl,mux-int-port node missing or invalid.\n");
120 goto err;
121 }
122 ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
123 if (ret) {
124 dev_err(&pdev->dev,
125 "fsl,mux-ext-port node missing or invalid.\n");
126 goto err;
127 }
128
129 /*
130 * The port numbering in the hardware manual starts at 1, while
131 * the audmux API expects it starts at 0.
132 */
133 int_port--;
134 ext_port--;
135
136 eukrea_tlv320_dai.cpus->of_node = ssi_np;
137 eukrea_tlv320_dai.platforms->of_node = ssi_np;
138 } else {
139 eukrea_tlv320_dai.cpus->dai_name = "imx-ssi.0";
140 eukrea_tlv320_dai.platforms->name = "imx-ssi.0";
141 eukrea_tlv320_dai.codecs->name = "tlv320aic23-codec.0-001a";
142 eukrea_tlv320.name = "cpuimx-audio";
143 }
144
145 if (machine_is_eukrea_cpuimx27() ||
146 (tmp_np = of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux"))) {
147 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
148 IMX_AUDMUX_V1_PCR_SYN |
149 IMX_AUDMUX_V1_PCR_TFSDIR |
150 IMX_AUDMUX_V1_PCR_TCLKDIR |
151 IMX_AUDMUX_V1_PCR_RFSDIR |
152 IMX_AUDMUX_V1_PCR_RCLKDIR |
153 IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
154 IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
155 IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
156 );
157 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
158 IMX_AUDMUX_V1_PCR_SYN |
159 IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
160 );
161 of_node_put(tmp_np);
162 } else if (machine_is_eukrea_cpuimx25sd() ||
163 machine_is_eukrea_cpuimx35sd() ||
164 machine_is_eukrea_cpuimx51sd() ||
165 (tmp_np = of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux"))) {
166 if (!np)
167 ext_port = machine_is_eukrea_cpuimx25sd() ?
168 4 : 3;
169
170 imx_audmux_v2_configure_port(int_port,
171 IMX_AUDMUX_V2_PTCR_SYN |
172 IMX_AUDMUX_V2_PTCR_TFSDIR |
173 IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
174 IMX_AUDMUX_V2_PTCR_TCLKDIR |
175 IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
176 IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
177 );
178 imx_audmux_v2_configure_port(ext_port,
179 IMX_AUDMUX_V2_PTCR_SYN,
180 IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
181 );
182 of_node_put(tmp_np);
183 } else {
184 if (np) {
185 /* The eukrea,asoc-tlv320 driver was explicitly
186 * requested (through the device tree).
187 */
188 dev_err(&pdev->dev,
189 "Missing or invalid audmux DT node.\n");
190 return -ENODEV;
191 } else {
192 /* Return happy.
193 * We might run on a totally different machine.
194 */
195 return 0;
196 }
197 }
198
199 ret = devm_snd_soc_register_card(&pdev->dev, &eukrea_tlv320);
200 err:
201 if (ret)
202 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
203 of_node_put(ssi_np);
204
205 return ret;
206 }
207
208 static const struct of_device_id imx_tlv320_dt_ids[] = {
209 { .compatible = "eukrea,asoc-tlv320"},
210 { /* sentinel */ }
211 };
212 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
213
214 static struct platform_driver eukrea_tlv320_driver = {
215 .driver = {
216 .name = "eukrea_tlv320",
217 .of_match_table = imx_tlv320_dt_ids,
218 },
219 .probe = eukrea_tlv320_probe,
220 };
221
222 module_platform_driver(eukrea_tlv320_driver);
223
224 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
225 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
226 MODULE_LICENSE("GPL");
227 MODULE_ALIAS("platform:eukrea_tlv320");
228