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
30static 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
60static const struct snd_soc_ops eukrea_tlv320_snd_ops = {
61	.hw_params	= eukrea_tlv320_hw_params,
62};
63
64SND_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
69static 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
78static struct snd_soc_card eukrea_tlv320 = {
79	.owner		= THIS_MODULE,
80	.dai_link	= &eukrea_tlv320_dai,
81	.num_links	= 1,
82};
83
84static 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);
200err:
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
208static void eukrea_tlv320_remove(struct platform_device *pdev)
209{
210	snd_soc_unregister_card(&eukrea_tlv320);
211}
212
213static const struct of_device_id imx_tlv320_dt_ids[] = {
214	{ .compatible = "eukrea,asoc-tlv320"},
215	{ /* sentinel */ }
216};
217MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
218
219static struct platform_driver eukrea_tlv320_driver = {
220	.driver = {
221		.name = "eukrea_tlv320",
222		.of_match_table = imx_tlv320_dt_ids,
223	},
224	.probe = eukrea_tlv320_probe,
225	.remove_new = eukrea_tlv320_remove,
226};
227
228module_platform_driver(eukrea_tlv320_driver);
229
230MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
231MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
232MODULE_LICENSE("GPL");
233MODULE_ALIAS("platform:eukrea_tlv320");
234