1/*
2 * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
3 *
4 * Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
5 *
6 * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
7 * which is Copyright 2009 Simtec Electronics
8 * and on sound/soc/imx/phycore-ac97.c which is
9 * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
10 *
11 *  This program is free software; you can redistribute  it and/or modify it
12 *  under  the terms of  the GNU General  Public License as published by the
13 *  Free Software Foundation;  either version 2 of the  License, or (at your
14 *  option) any later version.
15 *
16 */
17
18#include <linux/errno.h>
19#include <linux/module.h>
20#include <linux/moduleparam.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/device.h>
24#include <linux/i2c.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/soc.h>
28#include <asm/mach-types.h>
29
30#include "../codecs/tlv320aic23.h"
31#include "imx-ssi.h"
32#include "fsl_ssi.h"
33#include "imx-audmux.h"
34
35#define CODEC_CLOCK 12000000
36
37static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
38			    struct snd_pcm_hw_params *params)
39{
40	struct snd_soc_pcm_runtime *rtd = substream->private_data;
41	struct snd_soc_dai *codec_dai = rtd->codec_dai;
42	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
43	int ret;
44
45	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
46				     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
47	if (ret) {
48		dev_err(cpu_dai->dev,
49			"Failed to set the codec sysclk.\n");
50		return ret;
51	}
52
53	snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 0);
54
55	ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
56				SND_SOC_CLOCK_IN);
57	/* fsl_ssi lacks the set_sysclk ops */
58	if (ret && ret != -EINVAL) {
59		dev_err(cpu_dai->dev,
60			"Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
61		return ret;
62	}
63
64	return 0;
65}
66
67static struct snd_soc_ops eukrea_tlv320_snd_ops = {
68	.hw_params	= eukrea_tlv320_hw_params,
69};
70
71static struct snd_soc_dai_link eukrea_tlv320_dai = {
72	.name		= "tlv320aic23",
73	.stream_name	= "TLV320AIC23",
74	.codec_dai_name	= "tlv320aic23-hifi",
75	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
76			  SND_SOC_DAIFMT_CBM_CFM,
77	.ops		= &eukrea_tlv320_snd_ops,
78};
79
80static struct snd_soc_card eukrea_tlv320 = {
81	.owner		= THIS_MODULE,
82	.dai_link	= &eukrea_tlv320_dai,
83	.num_links	= 1,
84};
85
86static int eukrea_tlv320_probe(struct platform_device *pdev)
87{
88	int ret;
89	int int_port = 0, ext_port;
90	struct device_node *np = pdev->dev.of_node;
91	struct device_node *ssi_np = NULL, *codec_np = NULL;
92
93	eukrea_tlv320.dev = &pdev->dev;
94	if (np) {
95		ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
96						 "eukrea,model");
97		if (ret) {
98			dev_err(&pdev->dev,
99				"eukrea,model node missing or invalid.\n");
100			goto err;
101		}
102
103		ssi_np = of_parse_phandle(pdev->dev.of_node,
104					  "ssi-controller", 0);
105		if (!ssi_np) {
106			dev_err(&pdev->dev,
107				"ssi-controller missing or invalid.\n");
108			ret = -ENODEV;
109			goto err;
110		}
111
112		codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
113		if (codec_np)
114			eukrea_tlv320_dai.codec_of_node = codec_np;
115		else
116			dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
117
118		ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
119		if (ret) {
120			dev_err(&pdev->dev,
121				"fsl,mux-int-port node missing or invalid.\n");
122			return ret;
123		}
124		ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
125		if (ret) {
126			dev_err(&pdev->dev,
127				"fsl,mux-ext-port node missing or invalid.\n");
128			return ret;
129		}
130
131		/*
132		 * The port numbering in the hardware manual starts at 1, while
133		 * the audmux API expects it starts at 0.
134		 */
135		int_port--;
136		ext_port--;
137
138		eukrea_tlv320_dai.cpu_of_node = ssi_np;
139		eukrea_tlv320_dai.platform_of_node = ssi_np;
140	} else {
141		eukrea_tlv320_dai.cpu_dai_name = "imx-ssi.0";
142		eukrea_tlv320_dai.platform_name = "imx-ssi.0";
143		eukrea_tlv320_dai.codec_name = "tlv320aic23-codec.0-001a";
144		eukrea_tlv320.name = "cpuimx-audio";
145	}
146
147	if (machine_is_eukrea_cpuimx27() ||
148	    of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
149		imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
150			IMX_AUDMUX_V1_PCR_SYN |
151			IMX_AUDMUX_V1_PCR_TFSDIR |
152			IMX_AUDMUX_V1_PCR_TCLKDIR |
153			IMX_AUDMUX_V1_PCR_RFSDIR |
154			IMX_AUDMUX_V1_PCR_RCLKDIR |
155			IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
156			IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
157			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
158		);
159		imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
160			IMX_AUDMUX_V1_PCR_SYN |
161			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
162		);
163	} else if (machine_is_eukrea_cpuimx25sd() ||
164		   machine_is_eukrea_cpuimx35sd() ||
165		   machine_is_eukrea_cpuimx51sd() ||
166		   of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
167		if (!np)
168			ext_port = machine_is_eukrea_cpuimx25sd() ?
169				4 : 3;
170
171		imx_audmux_v2_configure_port(int_port,
172			IMX_AUDMUX_V2_PTCR_SYN |
173			IMX_AUDMUX_V2_PTCR_TFSDIR |
174			IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
175			IMX_AUDMUX_V2_PTCR_TCLKDIR |
176			IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
177			IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
178		);
179		imx_audmux_v2_configure_port(ext_port,
180			IMX_AUDMUX_V2_PTCR_SYN,
181			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
182		);
183	} else {
184		if (np) {
185			/* The eukrea,asoc-tlv320 driver was explicitely
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 int eukrea_tlv320_remove(struct platform_device *pdev)
209{
210	snd_soc_unregister_card(&eukrea_tlv320);
211
212	return 0;
213}
214
215static const struct of_device_id imx_tlv320_dt_ids[] = {
216	{ .compatible = "eukrea,asoc-tlv320"},
217	{ /* sentinel */ }
218};
219MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
220
221static 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
230module_platform_driver(eukrea_tlv320_driver);
231
232MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
233MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
234MODULE_LICENSE("GPL");
235MODULE_ALIAS("platform:eukrea_tlv320");
236