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ace36d85 VK |
1 | /* |
2 | * ALSA SoC SPDIF In Audio Layer for spear processors | |
3 | * | |
4 | * Copyright (C) 2012 ST Microelectronics | |
5 | * Vipin Kumar <vipin.kumar@st.com> | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #include <linux/clk.h> | |
13 | #include <linux/delay.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/ioport.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/platform_device.h> | |
e1771bcf | 21 | #include <sound/dmaengine_pcm.h> |
ace36d85 VK |
22 | #include <sound/pcm.h> |
23 | #include <sound/pcm_params.h> | |
24 | #include <sound/soc.h> | |
25 | #include <sound/spear_dma.h> | |
26 | #include <sound/spear_spdif.h> | |
27 | #include "spdif_in_regs.h" | |
ede38884 | 28 | #include "spear_pcm.h" |
ace36d85 VK |
29 | |
30 | struct spdif_in_params { | |
31 | u32 format; | |
32 | }; | |
33 | ||
34 | struct spdif_in_dev { | |
35 | struct clk *clk; | |
36 | struct spear_dma_data dma_params; | |
37 | struct spdif_in_params saved_params; | |
38 | void *io_base; | |
39 | struct device *dev; | |
40 | void (*reset_perip)(void); | |
41 | int irq; | |
e1771bcf SW |
42 | struct snd_dmaengine_dai_dma_data dma_params_rx; |
43 | struct snd_dmaengine_pcm_config config; | |
ace36d85 VK |
44 | }; |
45 | ||
46 | static void spdif_in_configure(struct spdif_in_dev *host) | |
47 | { | |
48 | u32 ctrl = SPDIF_IN_PRTYEN | SPDIF_IN_STATEN | SPDIF_IN_USREN | | |
49 | SPDIF_IN_VALEN | SPDIF_IN_BLKEN; | |
50 | ctrl |= SPDIF_MODE_16BIT | SPDIF_FIFO_THRES_16; | |
51 | ||
52 | writel(ctrl, host->io_base + SPDIF_IN_CTRL); | |
53 | writel(0xF, host->io_base + SPDIF_IN_IRQ_MASK); | |
54 | } | |
55 | ||
46fdd8b1 | 56 | static int spdif_in_dai_probe(struct snd_soc_dai *dai) |
ace36d85 | 57 | { |
46fdd8b1 | 58 | struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai); |
ace36d85 | 59 | |
e1771bcf SW |
60 | host->dma_params_rx.filter_data = &host->dma_params; |
61 | dai->capture_dma_data = &host->dma_params_rx; | |
ace36d85 | 62 | |
ace36d85 VK |
63 | return 0; |
64 | } | |
65 | ||
66 | static void spdif_in_shutdown(struct snd_pcm_substream *substream, | |
67 | struct snd_soc_dai *dai) | |
68 | { | |
69 | struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai); | |
70 | ||
71 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
72 | return; | |
73 | ||
74 | writel(0x0, host->io_base + SPDIF_IN_IRQ_MASK); | |
ace36d85 VK |
75 | } |
76 | ||
77 | static void spdif_in_format(struct spdif_in_dev *host, u32 format) | |
78 | { | |
79 | u32 ctrl = readl(host->io_base + SPDIF_IN_CTRL); | |
80 | ||
81 | switch (format) { | |
82 | case SNDRV_PCM_FORMAT_S16_LE: | |
83 | ctrl |= SPDIF_XTRACT_16BIT; | |
84 | break; | |
85 | ||
86 | case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE: | |
87 | ctrl &= ~SPDIF_XTRACT_16BIT; | |
88 | break; | |
89 | } | |
90 | ||
91 | writel(ctrl, host->io_base + SPDIF_IN_CTRL); | |
92 | } | |
93 | ||
94 | static int spdif_in_hw_params(struct snd_pcm_substream *substream, | |
95 | struct snd_pcm_hw_params *params, | |
96 | struct snd_soc_dai *dai) | |
97 | { | |
98 | struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai); | |
99 | u32 format; | |
100 | ||
101 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
102 | return -EINVAL; | |
103 | ||
104 | format = params_format(params); | |
105 | host->saved_params.format = format; | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | static int spdif_in_trigger(struct snd_pcm_substream *substream, int cmd, | |
111 | struct snd_soc_dai *dai) | |
112 | { | |
113 | struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai); | |
114 | u32 ctrl; | |
115 | int ret = 0; | |
116 | ||
117 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
118 | return -EINVAL; | |
119 | ||
120 | switch (cmd) { | |
121 | case SNDRV_PCM_TRIGGER_START: | |
122 | case SNDRV_PCM_TRIGGER_RESUME: | |
123 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
124 | clk_enable(host->clk); | |
125 | spdif_in_configure(host); | |
126 | spdif_in_format(host, host->saved_params.format); | |
127 | ||
128 | ctrl = readl(host->io_base + SPDIF_IN_CTRL); | |
129 | ctrl |= SPDIF_IN_SAMPLE | SPDIF_IN_ENB; | |
130 | writel(ctrl, host->io_base + SPDIF_IN_CTRL); | |
131 | writel(0xF, host->io_base + SPDIF_IN_IRQ_MASK); | |
132 | break; | |
133 | ||
134 | case SNDRV_PCM_TRIGGER_STOP: | |
135 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
136 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
137 | ctrl = readl(host->io_base + SPDIF_IN_CTRL); | |
138 | ctrl &= ~(SPDIF_IN_SAMPLE | SPDIF_IN_ENB); | |
139 | writel(ctrl, host->io_base + SPDIF_IN_CTRL); | |
140 | writel(0x0, host->io_base + SPDIF_IN_IRQ_MASK); | |
141 | ||
142 | if (host->reset_perip) | |
143 | host->reset_perip(); | |
144 | clk_disable(host->clk); | |
145 | break; | |
146 | ||
147 | default: | |
148 | ret = -EINVAL; | |
149 | break; | |
150 | } | |
151 | return ret; | |
152 | } | |
153 | ||
154 | static struct snd_soc_dai_ops spdif_in_dai_ops = { | |
ace36d85 VK |
155 | .shutdown = spdif_in_shutdown, |
156 | .trigger = spdif_in_trigger, | |
157 | .hw_params = spdif_in_hw_params, | |
158 | }; | |
159 | ||
169cc489 | 160 | static struct snd_soc_dai_driver spdif_in_dai = { |
46fdd8b1 | 161 | .probe = spdif_in_dai_probe, |
ace36d85 VK |
162 | .capture = { |
163 | .channels_min = 2, | |
164 | .channels_max = 2, | |
165 | .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
166 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \ | |
167 | SNDRV_PCM_RATE_192000), | |
168 | .formats = SNDRV_PCM_FMTBIT_S16_LE | \ | |
169 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE, | |
170 | }, | |
171 | .ops = &spdif_in_dai_ops, | |
172 | }; | |
173 | ||
669b4976 KM |
174 | static const struct snd_soc_component_driver spdif_in_component = { |
175 | .name = "spdif-in", | |
176 | }; | |
177 | ||
ace36d85 VK |
178 | static irqreturn_t spdif_in_irq(int irq, void *arg) |
179 | { | |
180 | struct spdif_in_dev *host = (struct spdif_in_dev *)arg; | |
181 | ||
182 | u32 irq_status = readl(host->io_base + SPDIF_IN_IRQ); | |
183 | ||
184 | if (!irq_status) | |
185 | return IRQ_NONE; | |
186 | ||
187 | if (irq_status & SPDIF_IRQ_FIFOWRITE) | |
188 | dev_err(host->dev, "spdif in: fifo write error"); | |
189 | if (irq_status & SPDIF_IRQ_EMPTYFIFOREAD) | |
190 | dev_err(host->dev, "spdif in: empty fifo read error"); | |
191 | if (irq_status & SPDIF_IRQ_FIFOFULL) | |
192 | dev_err(host->dev, "spdif in: fifo full error"); | |
193 | if (irq_status & SPDIF_IRQ_OUTOFRANGE) | |
194 | dev_err(host->dev, "spdif in: out of range error"); | |
195 | ||
196 | writel(0, host->io_base + SPDIF_IN_IRQ); | |
197 | ||
198 | return IRQ_HANDLED; | |
199 | } | |
200 | ||
201 | static int spdif_in_probe(struct platform_device *pdev) | |
202 | { | |
203 | struct spdif_in_dev *host; | |
204 | struct spear_spdif_platform_data *pdata; | |
205 | struct resource *res, *res_fifo; | |
552ef803 | 206 | void __iomem *io_base; |
ace36d85 VK |
207 | int ret; |
208 | ||
209 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
552ef803 AL |
210 | io_base = devm_ioremap_resource(&pdev->dev, res); |
211 | if (IS_ERR(io_base)) | |
212 | return PTR_ERR(io_base); | |
ace36d85 VK |
213 | |
214 | res_fifo = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
215 | if (!res_fifo) | |
216 | return -EINVAL; | |
217 | ||
ace36d85 VK |
218 | host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL); |
219 | if (!host) { | |
220 | dev_warn(&pdev->dev, "kzalloc fail\n"); | |
221 | return -ENOMEM; | |
222 | } | |
223 | ||
552ef803 | 224 | host->io_base = io_base; |
ace36d85 VK |
225 | host->irq = platform_get_irq(pdev, 0); |
226 | if (host->irq < 0) | |
227 | return -EINVAL; | |
228 | ||
bfcc74e6 | 229 | host->clk = devm_clk_get(&pdev->dev, NULL); |
ace36d85 VK |
230 | if (IS_ERR(host->clk)) |
231 | return PTR_ERR(host->clk); | |
232 | ||
233 | pdata = dev_get_platdata(&pdev->dev); | |
234 | ||
235 | if (!pdata) | |
236 | return -EINVAL; | |
237 | ||
238 | host->dma_params.data = pdata->dma_params; | |
239 | host->dma_params.addr = res_fifo->start; | |
240 | host->dma_params.max_burst = 16; | |
241 | host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
ace36d85 VK |
242 | host->reset_perip = pdata->reset_perip; |
243 | ||
244 | host->dev = &pdev->dev; | |
245 | dev_set_drvdata(&pdev->dev, host); | |
246 | ||
247 | ret = devm_request_irq(&pdev->dev, host->irq, spdif_in_irq, 0, | |
248 | "spdif-in", host); | |
249 | if (ret) { | |
ace36d85 VK |
250 | dev_warn(&pdev->dev, "request_irq failed\n"); |
251 | return ret; | |
252 | } | |
253 | ||
ede38884 SW |
254 | ret = devm_snd_soc_register_component(&pdev->dev, &spdif_in_component, |
255 | &spdif_in_dai, 1); | |
256 | if (ret) | |
257 | return ret; | |
258 | ||
e1771bcf SW |
259 | return devm_spear_pcm_platform_register(&pdev->dev, &host->config, |
260 | pdata->filter); | |
ace36d85 VK |
261 | } |
262 | ||
ace36d85 VK |
263 | static struct platform_driver spdif_in_driver = { |
264 | .probe = spdif_in_probe, | |
ace36d85 VK |
265 | .driver = { |
266 | .name = "spdif-in", | |
ace36d85 VK |
267 | }, |
268 | }; | |
269 | ||
270 | module_platform_driver(spdif_in_driver); | |
271 | ||
272 | MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>"); | |
273 | MODULE_DESCRIPTION("SPEAr SPDIF IN SoC Interface"); | |
274 | MODULE_LICENSE("GPL"); | |
275 | MODULE_ALIAS("platform:spdif_in"); |