1 // SPDX-License-Identifier: GPL-2.0+
3 // ALSA Soc Audio Layer - S3C2412 I2S driver
5 // Copyright (c) 2006 Wolfson Microelectronics PLC.
6 // Graeme Gregory graeme.gregory@wolfsonmicro.com
7 // linux@wolfsonmicro.com
9 // Copyright (c) 2007, 2004-2005 Simtec Electronics
10 // http://armlinux.simtec.co.uk/
11 // Ben Dooks <ben@simtec.co.uk>
13 #include <linux/delay.h>
14 #include <linux/gpio.h>
15 #include <linux/clk.h>
17 #include <linux/module.h>
19 #include <sound/soc.h>
20 #include <sound/pcm_params.h>
22 #include <mach/gpio-samsung.h>
23 #include <plat/gpio-cfg.h>
26 #include "regs-i2s-v2.h"
27 #include "s3c2412-i2s.h"
29 #include <linux/platform_data/asoc-s3c.h>
31 static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out
= {
36 static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in
= {
41 static struct s3c_i2sv2_info s3c2412_i2s
;
43 static int s3c2412_i2s_probe(struct snd_soc_dai
*dai
)
47 pr_debug("Entered %s\n", __func__
);
49 snd_soc_dai_init_dma_data(dai
, &s3c2412_i2s_pcm_stereo_out
,
50 &s3c2412_i2s_pcm_stereo_in
);
52 ret
= s3c_i2sv2_probe(dai
, &s3c2412_i2s
, S3C2410_PA_IIS
);
56 s3c2412_i2s
.dma_capture
= &s3c2412_i2s_pcm_stereo_in
;
57 s3c2412_i2s
.dma_playback
= &s3c2412_i2s_pcm_stereo_out
;
59 s3c2412_i2s
.iis_cclk
= devm_clk_get(dai
->dev
, "i2sclk");
60 if (IS_ERR(s3c2412_i2s
.iis_cclk
)) {
61 pr_err("failed to get i2sclk clock\n");
62 ret
= PTR_ERR(s3c2412_i2s
.iis_cclk
);
66 /* Set MPLL as the source for IIS CLK */
68 clk_set_parent(s3c2412_i2s
.iis_cclk
, clk_get(NULL
, "mpll"));
69 ret
= clk_prepare_enable(s3c2412_i2s
.iis_cclk
);
73 /* Configure the I2S pins (GPE0...GPE4) in correct mode */
74 s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
80 s3c_i2sv2_cleanup(dai
, &s3c2412_i2s
);
85 static int s3c2412_i2s_remove(struct snd_soc_dai
*dai
)
87 clk_disable_unprepare(s3c2412_i2s
.iis_cclk
);
88 s3c_i2sv2_cleanup(dai
, &s3c2412_i2s
);
93 static int s3c2412_i2s_hw_params(struct snd_pcm_substream
*substream
,
94 struct snd_pcm_hw_params
*params
,
95 struct snd_soc_dai
*cpu_dai
)
97 struct s3c_i2sv2_info
*i2s
= snd_soc_dai_get_drvdata(cpu_dai
);
100 pr_debug("Entered %s\n", __func__
);
102 iismod
= readl(i2s
->regs
+ S3C2412_IISMOD
);
103 pr_debug("%s: r: IISMOD: %x\n", __func__
, iismod
);
105 switch (params_width(params
)) {
107 iismod
|= S3C2412_IISMOD_8BIT
;
110 iismod
&= ~S3C2412_IISMOD_8BIT
;
114 writel(iismod
, i2s
->regs
+ S3C2412_IISMOD
);
115 pr_debug("%s: w: IISMOD: %x\n", __func__
, iismod
);
120 #define S3C2412_I2S_RATES \
121 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
122 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
123 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
125 static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops
= {
126 .hw_params
= s3c2412_i2s_hw_params
,
129 static struct snd_soc_dai_driver s3c2412_i2s_dai
= {
130 .probe
= s3c2412_i2s_probe
,
131 .remove
= s3c2412_i2s_remove
,
135 .rates
= S3C2412_I2S_RATES
,
136 .formats
= SNDRV_PCM_FMTBIT_S8
| SNDRV_PCM_FMTBIT_S16_LE
,
141 .rates
= S3C2412_I2S_RATES
,
142 .formats
= SNDRV_PCM_FMTBIT_S8
| SNDRV_PCM_FMTBIT_S16_LE
,
144 .ops
= &s3c2412_i2s_dai_ops
,
147 static const struct snd_soc_component_driver s3c2412_i2s_component
= {
148 .name
= "s3c2412-i2s",
151 static int s3c2412_iis_dev_probe(struct platform_device
*pdev
)
154 struct resource
*res
;
155 struct s3c_audio_pdata
*pdata
= dev_get_platdata(&pdev
->dev
);
158 dev_err(&pdev
->dev
, "missing platform data");
162 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
163 s3c2412_i2s
.regs
= devm_ioremap_resource(&pdev
->dev
, res
);
164 if (IS_ERR(s3c2412_i2s
.regs
))
165 return PTR_ERR(s3c2412_i2s
.regs
);
167 s3c2412_i2s_pcm_stereo_out
.addr
= res
->start
+ S3C2412_IISTXD
;
168 s3c2412_i2s_pcm_stereo_out
.filter_data
= pdata
->dma_playback
;
169 s3c2412_i2s_pcm_stereo_in
.addr
= res
->start
+ S3C2412_IISRXD
;
170 s3c2412_i2s_pcm_stereo_in
.filter_data
= pdata
->dma_capture
;
172 ret
= samsung_asoc_dma_platform_register(&pdev
->dev
,
176 pr_err("failed to register the DMA: %d\n", ret
);
180 ret
= s3c_i2sv2_register_component(&pdev
->dev
, -1,
181 &s3c2412_i2s_component
,
184 pr_err("failed to register the dai\n");
189 static struct platform_driver s3c2412_iis_driver
= {
190 .probe
= s3c2412_iis_dev_probe
,
192 .name
= "s3c2412-iis",
196 module_platform_driver(s3c2412_iis_driver
);
198 /* Module information */
199 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
200 MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
201 MODULE_LICENSE("GPL");
202 MODULE_ALIAS("platform:s3c2412-iis");