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13#include <linux/delay.h>
14#include <linux/gpio.h>
15#include <linux/clk.h>
16#include <linux/io.h>
17#include <linux/module.h>
18
19#include <sound/soc.h>
20#include <sound/pcm_params.h>
21
22#include "dma.h"
23#include "regs-i2s-v2.h"
24#include "s3c2412-i2s.h"
25
26#include <linux/platform_data/asoc-s3c.h>
27
28static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
29 .chan_name = "tx",
30 .addr_width = 4,
31};
32
33static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
34 .chan_name = "rx",
35 .addr_width = 4,
36};
37
38static struct s3c_i2sv2_info s3c2412_i2s;
39
40static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
41{
42 int ret;
43
44 pr_debug("Entered %s\n", __func__);
45
46 snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
47 &s3c2412_i2s_pcm_stereo_in);
48
49 ret = s3c_i2sv2_probe(dai, &s3c2412_i2s);
50 if (ret)
51 return ret;
52
53 s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
54 s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
55
56 s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk");
57 if (IS_ERR(s3c2412_i2s.iis_cclk)) {
58 pr_err("failed to get i2sclk clock\n");
59 ret = PTR_ERR(s3c2412_i2s.iis_cclk);
60 goto err;
61 }
62
63
64
65 clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
66 ret = clk_prepare_enable(s3c2412_i2s.iis_cclk);
67 if (ret)
68 goto err;
69
70 return 0;
71
72err:
73 s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
74
75 return ret;
76}
77
78static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
79{
80 clk_disable_unprepare(s3c2412_i2s.iis_cclk);
81 s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
82
83 return 0;
84}
85
86static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
87 struct snd_pcm_hw_params *params,
88 struct snd_soc_dai *cpu_dai)
89{
90 struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
91 u32 iismod;
92
93 pr_debug("Entered %s\n", __func__);
94
95 iismod = readl(i2s->regs + S3C2412_IISMOD);
96 pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
97
98 switch (params_width(params)) {
99 case 8:
100 iismod |= S3C2412_IISMOD_8BIT;
101 break;
102 case 16:
103 iismod &= ~S3C2412_IISMOD_8BIT;
104 break;
105 }
106
107 writel(iismod, i2s->regs + S3C2412_IISMOD);
108 pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
109
110 return 0;
111}
112
113#ifdef CONFIG_PM
114static int s3c2412_i2s_suspend(struct snd_soc_component *component)
115{
116 struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
117 u32 iismod;
118
119 if (component->active) {
120 i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
121 i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
122 i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
123
124
125
126 iismod = readl(i2s->regs + S3C2412_IISMOD);
127
128 if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
129 pr_warn("%s: RXDMA active?\n", __func__);
130
131 if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
132 pr_warn("%s: TXDMA active?\n", __func__);
133
134 if (iismod & S3C2412_IISCON_IIS_ACTIVE)
135 pr_warn("%s: IIS active\n", __func__);
136 }
137
138 return 0;
139}
140
141static int s3c2412_i2s_resume(struct snd_soc_component *component)
142{
143 struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
144
145 pr_info("component_active %d, IISMOD %08x, IISCON %08x\n",
146 component->active, i2s->suspend_iismod, i2s->suspend_iiscon);
147
148 if (component->active) {
149 writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
150 writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
151 writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
152
153 writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
154 i2s->regs + S3C2412_IISFIC);
155
156 ndelay(250);
157 writel(0x0, i2s->regs + S3C2412_IISFIC);
158 }
159
160 return 0;
161}
162#else
163#define s3c2412_i2s_suspend NULL
164#define s3c2412_i2s_resume NULL
165#endif
166
167#define S3C2412_I2S_RATES \
168 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
169 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
170 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
171
172static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
173 .hw_params = s3c2412_i2s_hw_params,
174};
175
176static struct snd_soc_dai_driver s3c2412_i2s_dai = {
177 .probe = s3c2412_i2s_probe,
178 .remove = s3c2412_i2s_remove,
179 .playback = {
180 .channels_min = 2,
181 .channels_max = 2,
182 .rates = S3C2412_I2S_RATES,
183 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
184 },
185 .capture = {
186 .channels_min = 2,
187 .channels_max = 2,
188 .rates = S3C2412_I2S_RATES,
189 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
190 },
191 .ops = &s3c2412_i2s_dai_ops,
192};
193
194static const struct snd_soc_component_driver s3c2412_i2s_component = {
195 .name = "s3c2412-i2s",
196 .suspend = s3c2412_i2s_suspend,
197 .resume = s3c2412_i2s_resume,
198};
199
200static int s3c2412_iis_dev_probe(struct platform_device *pdev)
201{
202 int ret = 0;
203 struct resource *res;
204 struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
205
206 if (!pdata) {
207 dev_err(&pdev->dev, "missing platform data");
208 return -ENXIO;
209 }
210
211 s3c2412_i2s.regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
212 if (IS_ERR(s3c2412_i2s.regs))
213 return PTR_ERR(s3c2412_i2s.regs);
214
215 s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
216 s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
217 s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
218 s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
219
220 ret = samsung_asoc_dma_platform_register(&pdev->dev,
221 pdata->dma_filter,
222 "tx", "rx", NULL);
223 if (ret) {
224 pr_err("failed to register the DMA: %d\n", ret);
225 return ret;
226 }
227
228 ret = s3c_i2sv2_register_component(&pdev->dev, -1,
229 &s3c2412_i2s_component,
230 &s3c2412_i2s_dai);
231 if (ret)
232 pr_err("failed to register the dai\n");
233
234 return ret;
235}
236
237static struct platform_driver s3c2412_iis_driver = {
238 .probe = s3c2412_iis_dev_probe,
239 .driver = {
240 .name = "s3c2412-iis",
241 },
242};
243
244module_platform_driver(s3c2412_iis_driver);
245
246
247MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
248MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
249MODULE_LICENSE("GPL");
250MODULE_ALIAS("platform:s3c2412-iis");
251
