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);
121 static int s3c2412_i2s_suspend(struct snd_soc_component *component)
123 struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
126 if (component->active) {
127 i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
128 i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
129 i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
131 /* some basic suspend checks */
133 iismod = readl(i2s->regs + S3C2412_IISMOD);
135 if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
136 pr_warn("%s: RXDMA active?\n", __func__);
138 if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
139 pr_warn("%s: TXDMA active?\n", __func__);
141 if (iismod & S3C2412_IISCON_IIS_ACTIVE)
142 pr_warn("%s: IIS active\n", __func__);
148 static int s3c2412_i2s_resume(struct snd_soc_component *component)
150 struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
152 pr_info("component_active %d, IISMOD %08x, IISCON %08x\n",
153 component->active, i2s->suspend_iismod, i2s->suspend_iiscon);
155 if (component->active) {
156 writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
157 writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
158 writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
160 writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
161 i2s->regs + S3C2412_IISFIC);
164 writel(0x0, i2s->regs + S3C2412_IISFIC);
170 #define s3c2412_i2s_suspend NULL
171 #define s3c2412_i2s_resume NULL
174 #define S3C2412_I2S_RATES \
175 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
176 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
177 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
179 static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
180 .hw_params = s3c2412_i2s_hw_params,
183 static struct snd_soc_dai_driver s3c2412_i2s_dai = {
184 .probe = s3c2412_i2s_probe,
185 .remove = s3c2412_i2s_remove,
189 .rates = S3C2412_I2S_RATES,
190 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
195 .rates = S3C2412_I2S_RATES,
196 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
198 .ops = &s3c2412_i2s_dai_ops,
201 static const struct snd_soc_component_driver s3c2412_i2s_component = {
202 .name = "s3c2412-i2s",
203 .suspend = s3c2412_i2s_suspend,
204 .resume = s3c2412_i2s_resume,
207 static int s3c2412_iis_dev_probe(struct platform_device *pdev)
210 struct resource *res;
211 struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
214 dev_err(&pdev->dev, "missing platform data");
218 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
219 s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
220 if (IS_ERR(s3c2412_i2s.regs))
221 return PTR_ERR(s3c2412_i2s.regs);
223 s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
224 s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
225 s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
226 s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
228 ret = samsung_asoc_dma_platform_register(&pdev->dev,
232 pr_err("failed to register the DMA: %d\n", ret);
236 ret = s3c_i2sv2_register_component(&pdev->dev, -1,
237 &s3c2412_i2s_component,
240 pr_err("failed to register the dai\n");
245 static struct platform_driver s3c2412_iis_driver = {
246 .probe = s3c2412_iis_dev_probe,
248 .name = "s3c2412-iis",
252 module_platform_driver(s3c2412_iis_driver);
254 /* Module information */
255 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
256 MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
257 MODULE_LICENSE("GPL");
258 MODULE_ALIAS("platform:s3c2412-iis");