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Linux/sound/soc/fsl/eukrea-tlv320.c

  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 
 37 static 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_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 46                                   SND_SOC_DAIFMT_NB_NF |
 47                                   SND_SOC_DAIFMT_CBM_CFM);
 48         /* fsl_ssi lacks the set_fmt ops. */
 49         if (ret && ret != -ENOTSUPP) {
 50                 dev_err(cpu_dai->dev,
 51                         "Failed to set the cpu dai format.\n");
 52                 return ret;
 53         }
 54 
 55         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 56                                   SND_SOC_DAIFMT_NB_NF |
 57                                   SND_SOC_DAIFMT_CBM_CFM);
 58         if (ret) {
 59                 dev_err(cpu_dai->dev,
 60                         "Failed to set the codec format.\n");
 61                 return ret;
 62         }
 63 
 64         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 65                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
 66         if (ret) {
 67                 dev_err(cpu_dai->dev,
 68                         "Failed to set the codec sysclk.\n");
 69                 return ret;
 70         }
 71 
 72         snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
 73 
 74         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
 75                                 SND_SOC_CLOCK_IN);
 76         /* fsl_ssi lacks the set_sysclk ops */
 77         if (ret && ret != -EINVAL) {
 78                 dev_err(cpu_dai->dev,
 79                         "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
 80                 return ret;
 81         }
 82 
 83         return 0;
 84 }
 85 
 86 static struct snd_soc_ops eukrea_tlv320_snd_ops = {
 87         .hw_params      = eukrea_tlv320_hw_params,
 88 };
 89 
 90 static struct snd_soc_dai_link eukrea_tlv320_dai = {
 91         .name           = "tlv320aic23",
 92         .stream_name    = "TLV320AIC23",
 93         .codec_dai_name = "tlv320aic23-hifi",
 94         .ops            = &eukrea_tlv320_snd_ops,
 95 };
 96 
 97 static struct snd_soc_card eukrea_tlv320 = {
 98         .owner          = THIS_MODULE,
 99         .dai_link       = &eukrea_tlv320_dai,
100         .num_links      = 1,
101 };
102 
103 static int eukrea_tlv320_probe(struct platform_device *pdev)
104 {
105         int ret;
106         int int_port = 0, ext_port;
107         struct device_node *np = pdev->dev.of_node;
108         struct device_node *ssi_np, *codec_np;
109 
110         eukrea_tlv320.dev = &pdev->dev;
111         if (np) {
112                 ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
113                                                  "eukrea,model");
114                 if (ret) {
115                         dev_err(&pdev->dev,
116                                 "eukrea,model node missing or invalid.\n");
117                         goto err;
118                 }
119 
120                 ssi_np = of_parse_phandle(pdev->dev.of_node,
121                                           "ssi-controller", 0);
122                 if (!ssi_np) {
123                         dev_err(&pdev->dev,
124                                 "ssi-controller missing or invalid.\n");
125                         ret = -ENODEV;
126                         goto err;
127                 }
128 
129                 codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
130                 if (codec_np)
131                         eukrea_tlv320_dai.codec_of_node = codec_np;
132                 else
133                         dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
134 
135                 ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
136                 if (ret) {
137                         dev_err(&pdev->dev,
138                                 "fsl,mux-int-port node missing or invalid.\n");
139                         return ret;
140                 }
141                 ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
142                 if (ret) {
143                         dev_err(&pdev->dev,
144                                 "fsl,mux-ext-port node missing or invalid.\n");
145                         return ret;
146                 }
147 
148                 /*
149                  * The port numbering in the hardware manual starts at 1, while
150                  * the audmux API expects it starts at 0.
151                  */
152                 int_port--;
153                 ext_port--;
154 
155                 eukrea_tlv320_dai.cpu_of_node = ssi_np;
156                 eukrea_tlv320_dai.platform_of_node = ssi_np;
157         } else {
158                 eukrea_tlv320_dai.cpu_dai_name = "imx-ssi.0";
159                 eukrea_tlv320_dai.platform_name = "imx-ssi.0";
160                 eukrea_tlv320_dai.codec_name = "tlv320aic23-codec.0-001a";
161                 eukrea_tlv320.name = "cpuimx-audio";
162         }
163 
164         if (machine_is_eukrea_cpuimx27() ||
165             of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
166                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
167                         IMX_AUDMUX_V1_PCR_SYN |
168                         IMX_AUDMUX_V1_PCR_TFSDIR |
169                         IMX_AUDMUX_V1_PCR_TCLKDIR |
170                         IMX_AUDMUX_V1_PCR_RFSDIR |
171                         IMX_AUDMUX_V1_PCR_RCLKDIR |
172                         IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
173                         IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
174                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
175                 );
176                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
177                         IMX_AUDMUX_V1_PCR_SYN |
178                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
179                 );
180         } else if (machine_is_eukrea_cpuimx25sd() ||
181                    machine_is_eukrea_cpuimx35sd() ||
182                    machine_is_eukrea_cpuimx51sd() ||
183                    of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
184                 if (!np)
185                         ext_port = machine_is_eukrea_cpuimx25sd() ?
186                                 4 : 3;
187 
188                 imx_audmux_v2_configure_port(int_port,
189                         IMX_AUDMUX_V2_PTCR_SYN |
190                         IMX_AUDMUX_V2_PTCR_TFSDIR |
191                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
192                         IMX_AUDMUX_V2_PTCR_TCLKDIR |
193                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
194                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
195                 );
196                 imx_audmux_v2_configure_port(ext_port,
197                         IMX_AUDMUX_V2_PTCR_SYN,
198                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
199                 );
200         } else {
201                 if (np) {
202                         /* The eukrea,asoc-tlv320 driver was explicitely
203                          * requested (through the device tree).
204                          */
205                         dev_err(&pdev->dev,
206                                 "Missing or invalid audmux DT node.\n");
207                         return -ENODEV;
208                 } else {
209                         /* Return happy.
210                          * We might run on a totally different machine.
211                          */
212                         return 0;
213                 }
214         }
215 
216         ret = snd_soc_register_card(&eukrea_tlv320);
217 err:
218         if (ret)
219                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
220         if (np)
221                 of_node_put(ssi_np);
222 
223         return ret;
224 }
225 
226 static int eukrea_tlv320_remove(struct platform_device *pdev)
227 {
228         snd_soc_unregister_card(&eukrea_tlv320);
229 
230         return 0;
231 }
232 
233 static const struct of_device_id imx_tlv320_dt_ids[] = {
234         { .compatible = "eukrea,asoc-tlv320"},
235         { /* sentinel */ }
236 };
237 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
238 
239 static struct platform_driver eukrea_tlv320_driver = {
240         .driver = {
241                 .name = "eukrea_tlv320",
242                 .owner = THIS_MODULE,
243                 .of_match_table = imx_tlv320_dt_ids,
244         },
245         .probe = eukrea_tlv320_probe,
246         .remove = eukrea_tlv320_remove,
247 };
248 
249 module_platform_driver(eukrea_tlv320_driver);
250 
251 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
252 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
253 MODULE_LICENSE("GPL");
254 MODULE_ALIAS("platform:eukrea_tlv320");
255 

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