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 = asoc_substream_to_rtd(substream);
34 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
35 	struct snd_soc_dai *cpu_dai = asoc_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 = snd_soc_register_card(&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 
eukrea_tlv320_remove(struct platform_device * pdev)208 static int eukrea_tlv320_remove(struct platform_device *pdev)
209 {
210 	snd_soc_unregister_card(&eukrea_tlv320);
211 
212 	return 0;
213 }
214 
215 static const struct of_device_id imx_tlv320_dt_ids[] = {
216 	{ .compatible = "eukrea,asoc-tlv320"},
217 	{ /* sentinel */ }
218 };
219 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
220 
221 static struct platform_driver eukrea_tlv320_driver = {
222 	.driver = {
223 		.name = "eukrea_tlv320",
224 		.of_match_table = imx_tlv320_dt_ids,
225 	},
226 	.probe = eukrea_tlv320_probe,
227 	.remove = eukrea_tlv320_remove,
228 };
229 
230 module_platform_driver(eukrea_tlv320_driver);
231 
232 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
233 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
234 MODULE_LICENSE("GPL");
235 MODULE_ALIAS("platform:eukrea_tlv320");
236