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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_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 
 67 static struct snd_soc_ops eukrea_tlv320_snd_ops = {
 68         .hw_params      = eukrea_tlv320_hw_params,
 69 };
 70 
 71 static 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 
 80 static struct snd_soc_card eukrea_tlv320 = {
 81         .owner          = THIS_MODULE,
 82         .dai_link       = &eukrea_tlv320_dai,
 83         .num_links      = 1,
 84 };
 85 
 86 static 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);
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 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 

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