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4b166da9 DG |
1 | /* |
2 | * ALSA SoC I2S Audio Layer for the Stretch S6000 family | |
3 | * | |
4 | * Author: Daniel Gloeckner, <dg@emlix.com> | |
5 | * Copyright: (C) 2009 emlix GmbH <info@emlix.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/clk.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/io.h> | |
19 | ||
20 | #include <sound/core.h> | |
21 | #include <sound/pcm.h> | |
22 | #include <sound/pcm_params.h> | |
23 | #include <sound/initval.h> | |
24 | #include <sound/soc.h> | |
25 | ||
26 | #include "s6000-i2s.h" | |
27 | #include "s6000-pcm.h" | |
28 | ||
29 | struct s6000_i2s_dev { | |
30 | dma_addr_t sifbase; | |
31 | u8 __iomem *scbbase; | |
32 | unsigned int wide; | |
33 | unsigned int channel_in; | |
34 | unsigned int channel_out; | |
35 | unsigned int lines_in; | |
36 | unsigned int lines_out; | |
37 | struct s6000_pcm_dma_params dma_params; | |
38 | }; | |
39 | ||
40 | #define S6_I2S_INTERRUPT_STATUS 0x00 | |
41 | #define S6_I2S_INT_OVERRUN 1 | |
42 | #define S6_I2S_INT_UNDERRUN 2 | |
43 | #define S6_I2S_INT_ALIGNMENT 4 | |
44 | #define S6_I2S_INTERRUPT_ENABLE 0x04 | |
45 | #define S6_I2S_INTERRUPT_RAW 0x08 | |
46 | #define S6_I2S_INTERRUPT_CLEAR 0x0C | |
47 | #define S6_I2S_INTERRUPT_SET 0x10 | |
48 | #define S6_I2S_MODE 0x20 | |
49 | #define S6_I2S_DUAL 0 | |
50 | #define S6_I2S_WIDE 1 | |
51 | #define S6_I2S_TX_DEFAULT 0x24 | |
52 | #define S6_I2S_DATA_CFG(c) (0x40 + 0x10 * (c)) | |
53 | #define S6_I2S_IN 0 | |
54 | #define S6_I2S_OUT 1 | |
55 | #define S6_I2S_UNUSED 2 | |
56 | #define S6_I2S_INTERFACE_CFG(c) (0x44 + 0x10 * (c)) | |
57 | #define S6_I2S_DIV_MASK 0x001fff | |
58 | #define S6_I2S_16BIT 0x000000 | |
59 | #define S6_I2S_20BIT 0x002000 | |
60 | #define S6_I2S_24BIT 0x004000 | |
61 | #define S6_I2S_32BIT 0x006000 | |
62 | #define S6_I2S_BITS_MASK 0x006000 | |
63 | #define S6_I2S_MEM_16BIT 0x000000 | |
64 | #define S6_I2S_MEM_32BIT 0x008000 | |
65 | #define S6_I2S_MEM_MASK 0x008000 | |
66 | #define S6_I2S_CHANNELS_SHIFT 16 | |
67 | #define S6_I2S_CHANNELS_MASK 0x030000 | |
68 | #define S6_I2S_SCK_IN 0x000000 | |
69 | #define S6_I2S_SCK_OUT 0x040000 | |
70 | #define S6_I2S_SCK_DIR 0x040000 | |
71 | #define S6_I2S_WS_IN 0x000000 | |
72 | #define S6_I2S_WS_OUT 0x080000 | |
73 | #define S6_I2S_WS_DIR 0x080000 | |
74 | #define S6_I2S_LEFT_FIRST 0x000000 | |
75 | #define S6_I2S_RIGHT_FIRST 0x100000 | |
76 | #define S6_I2S_FIRST 0x100000 | |
77 | #define S6_I2S_CUR_SCK 0x200000 | |
78 | #define S6_I2S_CUR_WS 0x400000 | |
79 | #define S6_I2S_ENABLE(c) (0x48 + 0x10 * (c)) | |
80 | #define S6_I2S_DISABLE_IF 0x02 | |
81 | #define S6_I2S_ENABLE_IF 0x03 | |
82 | #define S6_I2S_IS_BUSY 0x04 | |
83 | #define S6_I2S_DMA_ACTIVE 0x08 | |
84 | #define S6_I2S_IS_ENABLED 0x10 | |
85 | ||
86 | #define S6_I2S_NUM_LINES 4 | |
87 | ||
88 | #define S6_I2S_SIF_PORT0 0x0000000 | |
89 | #define S6_I2S_SIF_PORT1 0x0000080 /* docs say 0x0000010 */ | |
90 | ||
91 | static inline void s6_i2s_write_reg(struct s6000_i2s_dev *dev, int reg, u32 val) | |
92 | { | |
93 | writel(val, dev->scbbase + reg); | |
94 | } | |
95 | ||
96 | static inline u32 s6_i2s_read_reg(struct s6000_i2s_dev *dev, int reg) | |
97 | { | |
98 | return readl(dev->scbbase + reg); | |
99 | } | |
100 | ||
101 | static inline void s6_i2s_mod_reg(struct s6000_i2s_dev *dev, int reg, | |
102 | u32 mask, u32 val) | |
103 | { | |
104 | val ^= s6_i2s_read_reg(dev, reg) & ~mask; | |
105 | s6_i2s_write_reg(dev, reg, val); | |
106 | } | |
107 | ||
108 | static void s6000_i2s_start_channel(struct s6000_i2s_dev *dev, int channel) | |
109 | { | |
110 | int i, j, cur, prev; | |
111 | ||
112 | /* | |
113 | * Wait for WCLK to toggle 5 times before enabling the channel | |
114 | * s6000 Family Datasheet 3.6.4: | |
115 | * "At least two cycles of WS must occur between commands | |
116 | * to disable or enable the interface" | |
117 | */ | |
118 | j = 0; | |
119 | prev = ~S6_I2S_CUR_WS; | |
120 | for (i = 1000000; --i && j < 6; ) { | |
121 | cur = s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(channel)) | |
122 | & S6_I2S_CUR_WS; | |
123 | if (prev != cur) { | |
124 | prev = cur; | |
125 | j++; | |
126 | } | |
127 | } | |
128 | if (j < 6) | |
129 | printk(KERN_WARNING "s6000-i2s: timeout waiting for WCLK\n"); | |
130 | ||
131 | s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_ENABLE_IF); | |
132 | } | |
133 | ||
134 | static void s6000_i2s_stop_channel(struct s6000_i2s_dev *dev, int channel) | |
135 | { | |
136 | s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_DISABLE_IF); | |
137 | } | |
138 | ||
139 | static void s6000_i2s_start(struct snd_pcm_substream *substream) | |
140 | { | |
141 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
142 | struct s6000_i2s_dev *dev = rtd->dai->cpu_dai->private_data; | |
143 | int channel; | |
144 | ||
145 | channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
146 | dev->channel_out : dev->channel_in; | |
147 | ||
148 | s6000_i2s_start_channel(dev, channel); | |
149 | } | |
150 | ||
151 | static void s6000_i2s_stop(struct snd_pcm_substream *substream) | |
152 | { | |
153 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
154 | struct s6000_i2s_dev *dev = rtd->dai->cpu_dai->private_data; | |
155 | int channel; | |
156 | ||
157 | channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
158 | dev->channel_out : dev->channel_in; | |
159 | ||
160 | s6000_i2s_stop_channel(dev, channel); | |
161 | } | |
162 | ||
163 | static int s6000_i2s_trigger(struct snd_pcm_substream *substream, int cmd, | |
164 | int after) | |
165 | { | |
166 | switch (cmd) { | |
167 | case SNDRV_PCM_TRIGGER_START: | |
168 | case SNDRV_PCM_TRIGGER_RESUME: | |
169 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
170 | if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) ^ !after) | |
171 | s6000_i2s_start(substream); | |
172 | break; | |
173 | case SNDRV_PCM_TRIGGER_STOP: | |
174 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
175 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
176 | if (!after) | |
177 | s6000_i2s_stop(substream); | |
178 | } | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static unsigned int s6000_i2s_int_sources(struct s6000_i2s_dev *dev) | |
183 | { | |
184 | unsigned int pending; | |
185 | pending = s6_i2s_read_reg(dev, S6_I2S_INTERRUPT_RAW); | |
186 | pending &= S6_I2S_INT_ALIGNMENT | | |
187 | S6_I2S_INT_UNDERRUN | | |
188 | S6_I2S_INT_OVERRUN; | |
189 | s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR, pending); | |
190 | ||
191 | return pending; | |
192 | } | |
193 | ||
194 | static unsigned int s6000_i2s_check_xrun(struct snd_soc_dai *cpu_dai) | |
195 | { | |
196 | struct s6000_i2s_dev *dev = cpu_dai->private_data; | |
197 | unsigned int errors; | |
198 | unsigned int ret; | |
199 | ||
200 | errors = s6000_i2s_int_sources(dev); | |
201 | if (likely(!errors)) | |
202 | return 0; | |
203 | ||
204 | ret = 0; | |
205 | if (errors & S6_I2S_INT_ALIGNMENT) | |
206 | printk(KERN_ERR "s6000-i2s: WCLK misaligned\n"); | |
207 | if (errors & S6_I2S_INT_UNDERRUN) | |
208 | ret |= 1 << SNDRV_PCM_STREAM_PLAYBACK; | |
209 | if (errors & S6_I2S_INT_OVERRUN) | |
210 | ret |= 1 << SNDRV_PCM_STREAM_CAPTURE; | |
211 | return ret; | |
212 | } | |
213 | ||
214 | static void s6000_i2s_wait_disabled(struct s6000_i2s_dev *dev) | |
215 | { | |
216 | int channel; | |
217 | int n = 50; | |
218 | for (channel = 0; channel < 2; channel++) { | |
219 | while (--n >= 0) { | |
220 | int v = s6_i2s_read_reg(dev, S6_I2S_ENABLE(channel)); | |
221 | if ((v & S6_I2S_IS_ENABLED) | |
222 | || !(v & (S6_I2S_DMA_ACTIVE | S6_I2S_IS_BUSY))) | |
223 | break; | |
224 | udelay(20); | |
225 | } | |
226 | } | |
227 | if (n < 0) | |
228 | printk(KERN_WARNING "s6000-i2s: timeout disabling interfaces"); | |
229 | } | |
230 | ||
231 | static int s6000_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, | |
232 | unsigned int fmt) | |
233 | { | |
234 | struct s6000_i2s_dev *dev = cpu_dai->private_data; | |
235 | u32 w; | |
236 | ||
237 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
238 | case SND_SOC_DAIFMT_CBM_CFM: | |
239 | w = S6_I2S_SCK_IN | S6_I2S_WS_IN; | |
240 | break; | |
241 | case SND_SOC_DAIFMT_CBS_CFM: | |
242 | w = S6_I2S_SCK_OUT | S6_I2S_WS_IN; | |
243 | break; | |
244 | case SND_SOC_DAIFMT_CBM_CFS: | |
245 | w = S6_I2S_SCK_IN | S6_I2S_WS_OUT; | |
246 | break; | |
247 | case SND_SOC_DAIFMT_CBS_CFS: | |
248 | w = S6_I2S_SCK_OUT | S6_I2S_WS_OUT; | |
249 | break; | |
250 | default: | |
251 | return -EINVAL; | |
252 | } | |
253 | ||
254 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
255 | case SND_SOC_DAIFMT_IB_IF: | |
256 | w |= S6_I2S_LEFT_FIRST; | |
257 | break; | |
258 | case SND_SOC_DAIFMT_IB_NF: | |
259 | w |= S6_I2S_RIGHT_FIRST; | |
260 | break; | |
261 | default: | |
262 | return -EINVAL; | |
263 | } | |
264 | ||
265 | s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(0), | |
266 | S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w); | |
267 | s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(1), | |
268 | S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int s6000_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div) | |
274 | { | |
275 | struct s6000_i2s_dev *dev = dai->private_data; | |
276 | ||
277 | if (!div || (div & 1) || div > (S6_I2S_DIV_MASK + 1) * 2) | |
278 | return -EINVAL; | |
279 | ||
280 | s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(div_id), | |
281 | S6_I2S_DIV_MASK, div / 2 - 1); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int s6000_i2s_hw_params(struct snd_pcm_substream *substream, | |
286 | struct snd_pcm_hw_params *params, | |
287 | struct snd_soc_dai *dai) | |
288 | { | |
289 | struct s6000_i2s_dev *dev = dai->private_data; | |
290 | int interf; | |
291 | u32 w = 0; | |
292 | ||
293 | if (dev->wide) | |
294 | interf = 0; | |
295 | else { | |
296 | w |= (((params_channels(params) - 2) / 2) | |
297 | << S6_I2S_CHANNELS_SHIFT) & S6_I2S_CHANNELS_MASK; | |
298 | interf = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
299 | ? dev->channel_out : dev->channel_in; | |
300 | } | |
301 | ||
302 | switch (params_format(params)) { | |
303 | case SNDRV_PCM_FORMAT_S16_LE: | |
304 | w |= S6_I2S_16BIT | S6_I2S_MEM_16BIT; | |
305 | break; | |
306 | case SNDRV_PCM_FORMAT_S32_LE: | |
307 | w |= S6_I2S_32BIT | S6_I2S_MEM_32BIT; | |
308 | break; | |
309 | default: | |
310 | printk(KERN_WARNING "s6000-i2s: unsupported PCM format %x\n", | |
311 | params_format(params)); | |
312 | return -EINVAL; | |
313 | } | |
314 | ||
315 | if (s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(interf)) | |
316 | & S6_I2S_IS_ENABLED) { | |
317 | printk(KERN_ERR "s6000-i2s: interface already enabled\n"); | |
318 | return -EBUSY; | |
319 | } | |
320 | ||
321 | s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(interf), | |
322 | S6_I2S_CHANNELS_MASK|S6_I2S_MEM_MASK|S6_I2S_BITS_MASK, | |
323 | w); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int s6000_i2s_dai_probe(struct platform_device *pdev, | |
329 | struct snd_soc_dai *dai) | |
330 | { | |
331 | struct s6000_i2s_dev *dev = dai->private_data; | |
332 | struct s6000_snd_platform_data *pdata = pdev->dev.platform_data; | |
333 | ||
334 | if (!pdata) | |
335 | return -EINVAL; | |
336 | ||
337 | dev->wide = pdata->wide; | |
338 | dev->channel_in = pdata->channel_in; | |
339 | dev->channel_out = pdata->channel_out; | |
340 | dev->lines_in = pdata->lines_in; | |
341 | dev->lines_out = pdata->lines_out; | |
342 | ||
343 | s6_i2s_write_reg(dev, S6_I2S_MODE, | |
344 | dev->wide ? S6_I2S_WIDE : S6_I2S_DUAL); | |
345 | ||
346 | if (dev->wide) { | |
347 | int i; | |
348 | ||
349 | if (dev->lines_in + dev->lines_out > S6_I2S_NUM_LINES) | |
350 | return -EINVAL; | |
351 | ||
352 | dev->channel_in = 0; | |
353 | dev->channel_out = 1; | |
354 | dai->capture.channels_min = 2 * dev->lines_in; | |
355 | dai->capture.channels_max = dai->capture.channels_min; | |
356 | dai->playback.channels_min = 2 * dev->lines_out; | |
357 | dai->playback.channels_max = dai->playback.channels_min; | |
358 | ||
359 | for (i = 0; i < dev->lines_out; i++) | |
360 | s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_OUT); | |
361 | ||
362 | for (; i < S6_I2S_NUM_LINES - dev->lines_in; i++) | |
363 | s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), | |
364 | S6_I2S_UNUSED); | |
365 | ||
366 | for (; i < S6_I2S_NUM_LINES; i++) | |
367 | s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_IN); | |
368 | } else { | |
369 | unsigned int cfg[2] = {S6_I2S_UNUSED, S6_I2S_UNUSED}; | |
370 | ||
371 | if (dev->lines_in > 1 || dev->lines_out > 1) | |
372 | return -EINVAL; | |
373 | ||
374 | dai->capture.channels_min = 2 * dev->lines_in; | |
375 | dai->capture.channels_max = 8 * dev->lines_in; | |
376 | dai->playback.channels_min = 2 * dev->lines_out; | |
377 | dai->playback.channels_max = 8 * dev->lines_out; | |
378 | ||
379 | if (dev->lines_in) | |
380 | cfg[dev->channel_in] = S6_I2S_IN; | |
381 | if (dev->lines_out) | |
382 | cfg[dev->channel_out] = S6_I2S_OUT; | |
383 | ||
384 | s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(0), cfg[0]); | |
385 | s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(1), cfg[1]); | |
386 | } | |
387 | ||
388 | if (dev->lines_out) { | |
389 | if (dev->lines_in) { | |
390 | if (!dev->dma_params.dma_out) | |
391 | return -ENODEV; | |
392 | } else { | |
393 | dev->dma_params.dma_out = dev->dma_params.dma_in; | |
394 | dev->dma_params.dma_in = 0; | |
395 | } | |
396 | } | |
397 | dev->dma_params.sif_in = dev->sifbase + (dev->channel_in ? | |
398 | S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0); | |
399 | dev->dma_params.sif_out = dev->sifbase + (dev->channel_out ? | |
400 | S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0); | |
401 | dev->dma_params.same_rate = pdata->same_rate | pdata->wide; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | #define S6000_I2S_RATES (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_5512 | \ | |
406 | SNDRV_PCM_RATE_8000_192000) | |
407 | #define S6000_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
408 | ||
409 | static struct snd_soc_dai_ops s6000_i2s_dai_ops = { | |
410 | .set_fmt = s6000_i2s_set_dai_fmt, | |
411 | .set_clkdiv = s6000_i2s_set_clkdiv, | |
412 | .hw_params = s6000_i2s_hw_params, | |
413 | }; | |
414 | ||
415 | struct snd_soc_dai s6000_i2s_dai = { | |
416 | .name = "s6000-i2s", | |
417 | .id = 0, | |
418 | .probe = s6000_i2s_dai_probe, | |
419 | .playback = { | |
420 | .channels_min = 2, | |
421 | .channels_max = 8, | |
422 | .formats = S6000_I2S_FORMATS, | |
423 | .rates = S6000_I2S_RATES, | |
424 | .rate_min = 0, | |
425 | .rate_max = 1562500, | |
426 | }, | |
427 | .capture = { | |
428 | .channels_min = 2, | |
429 | .channels_max = 8, | |
430 | .formats = S6000_I2S_FORMATS, | |
431 | .rates = S6000_I2S_RATES, | |
432 | .rate_min = 0, | |
433 | .rate_max = 1562500, | |
434 | }, | |
435 | .ops = &s6000_i2s_dai_ops, | |
436 | } | |
437 | EXPORT_SYMBOL_GPL(s6000_i2s_dai); | |
438 | ||
439 | static int __devinit s6000_i2s_probe(struct platform_device *pdev) | |
440 | { | |
441 | struct s6000_i2s_dev *dev; | |
442 | struct resource *scbmem, *sifmem, *region, *dma1, *dma2; | |
443 | u8 __iomem *mmio; | |
444 | int ret; | |
445 | ||
446 | scbmem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
447 | if (!scbmem) { | |
448 | dev_err(&pdev->dev, "no mem resource?\n"); | |
449 | ret = -ENODEV; | |
450 | goto err_release_none; | |
451 | } | |
452 | ||
453 | region = request_mem_region(scbmem->start, | |
454 | scbmem->end - scbmem->start + 1, | |
455 | pdev->name); | |
456 | if (!region) { | |
457 | dev_err(&pdev->dev, "I2S SCB region already claimed\n"); | |
458 | ret = -EBUSY; | |
459 | goto err_release_none; | |
460 | } | |
461 | ||
462 | mmio = ioremap(scbmem->start, scbmem->end - scbmem->start + 1); | |
463 | if (!mmio) { | |
464 | dev_err(&pdev->dev, "can't ioremap SCB region\n"); | |
465 | ret = -ENOMEM; | |
466 | goto err_release_scb; | |
467 | } | |
468 | ||
469 | sifmem = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
470 | if (!sifmem) { | |
471 | dev_err(&pdev->dev, "no second mem resource?\n"); | |
472 | ret = -ENODEV; | |
473 | goto err_release_map; | |
474 | } | |
475 | ||
476 | region = request_mem_region(sifmem->start, | |
477 | sifmem->end - sifmem->start + 1, | |
478 | pdev->name); | |
479 | if (!region) { | |
480 | dev_err(&pdev->dev, "I2S SIF region already claimed\n"); | |
481 | ret = -EBUSY; | |
482 | goto err_release_map; | |
483 | } | |
484 | ||
485 | dma1 = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
486 | if (!dma1) { | |
487 | dev_err(&pdev->dev, "no dma resource?\n"); | |
488 | ret = -ENODEV; | |
489 | goto err_release_sif; | |
490 | } | |
491 | ||
492 | region = request_mem_region(dma1->start, dma1->end - dma1->start + 1, | |
493 | pdev->name); | |
494 | if (!region) { | |
495 | dev_err(&pdev->dev, "I2S DMA region already claimed\n"); | |
496 | ret = -EBUSY; | |
497 | goto err_release_sif; | |
498 | } | |
499 | ||
500 | dma2 = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
501 | if (dma2) { | |
502 | region = request_mem_region(dma2->start, | |
503 | dma2->end - dma2->start + 1, | |
504 | pdev->name); | |
505 | if (!region) { | |
506 | dev_err(&pdev->dev, | |
507 | "I2S DMA region already claimed\n"); | |
508 | ret = -EBUSY; | |
509 | goto err_release_dma1; | |
510 | } | |
511 | } | |
512 | ||
513 | dev = kzalloc(sizeof(struct s6000_i2s_dev), GFP_KERNEL); | |
514 | if (!dev) { | |
515 | ret = -ENOMEM; | |
516 | goto err_release_dma2; | |
517 | } | |
518 | ||
519 | s6000_i2s_dai.dev = &pdev->dev; | |
520 | s6000_i2s_dai.private_data = dev; | |
521 | s6000_i2s_dai.dma_data = &dev->dma_params; | |
522 | ||
523 | dev->sifbase = sifmem->start; | |
524 | dev->scbbase = mmio; | |
525 | ||
526 | s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0); | |
527 | s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR, | |
528 | S6_I2S_INT_ALIGNMENT | | |
529 | S6_I2S_INT_UNDERRUN | | |
530 | S6_I2S_INT_OVERRUN); | |
531 | ||
532 | s6000_i2s_stop_channel(dev, 0); | |
533 | s6000_i2s_stop_channel(dev, 1); | |
534 | s6000_i2s_wait_disabled(dev); | |
535 | ||
536 | dev->dma_params.check_xrun = s6000_i2s_check_xrun; | |
537 | dev->dma_params.trigger = s6000_i2s_trigger; | |
538 | dev->dma_params.dma_in = dma1->start; | |
539 | dev->dma_params.dma_out = dma2 ? dma2->start : 0; | |
540 | dev->dma_params.irq = platform_get_irq(pdev, 0); | |
541 | if (dev->dma_params.irq < 0) { | |
542 | dev_err(&pdev->dev, "no irq resource?\n"); | |
543 | ret = -ENODEV; | |
544 | goto err_release_dev; | |
545 | } | |
546 | ||
547 | s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, | |
548 | S6_I2S_INT_ALIGNMENT | | |
549 | S6_I2S_INT_UNDERRUN | | |
550 | S6_I2S_INT_OVERRUN); | |
551 | ||
552 | ret = snd_soc_register_dai(&s6000_i2s_dai); | |
553 | if (ret) | |
554 | goto err_release_dev; | |
555 | ||
556 | return 0; | |
557 | ||
558 | err_release_dev: | |
559 | kfree(dev); | |
560 | err_release_dma2: | |
561 | if (dma2) | |
562 | release_mem_region(dma2->start, dma2->end - dma2->start + 1); | |
563 | err_release_dma1: | |
564 | release_mem_region(dma1->start, dma1->end - dma1->start + 1); | |
565 | err_release_sif: | |
566 | release_mem_region(sifmem->start, (sifmem->end - sifmem->start) + 1); | |
567 | err_release_map: | |
568 | iounmap(mmio); | |
569 | err_release_scb: | |
570 | release_mem_region(scbmem->start, (scbmem->end - scbmem->start) + 1); | |
571 | err_release_none: | |
572 | return ret; | |
573 | } | |
574 | ||
575 | static void __devexit s6000_i2s_remove(struct platform_device *pdev) | |
576 | { | |
577 | struct s6000_i2s_dev *dev = s6000_i2s_dai.private_data; | |
578 | struct resource *region; | |
579 | void __iomem *mmio = dev->scbbase; | |
580 | ||
581 | snd_soc_unregister_dai(&s6000_i2s_dai); | |
582 | ||
583 | s6000_i2s_stop_channel(dev, 0); | |
584 | s6000_i2s_stop_channel(dev, 1); | |
585 | ||
586 | s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0); | |
587 | s6000_i2s_dai.private_data = 0; | |
588 | kfree(dev); | |
589 | ||
590 | region = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
591 | release_mem_region(region->start, region->end - region->start + 1); | |
592 | ||
593 | region = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
594 | if (region) | |
595 | release_mem_region(region->start, | |
596 | region->end - region->start + 1); | |
597 | ||
598 | region = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
599 | release_mem_region(region->start, (region->end - region->start) + 1); | |
600 | ||
601 | iounmap(mmio); | |
602 | region = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
603 | release_mem_region(region->start, (region->end - region->start) + 1); | |
604 | } | |
605 | ||
606 | static struct platform_driver s6000_i2s_driver = { | |
607 | .probe = s6000_i2s_probe, | |
608 | .remove = __devexit_p(s6000_i2s_remove), | |
609 | .driver = { | |
610 | .name = "s6000-i2s", | |
611 | .owner = THIS_MODULE, | |
612 | }, | |
613 | }; | |
614 | ||
615 | static int __init s6000_i2s_init(void) | |
616 | { | |
617 | return platform_driver_register(&s6000_i2s_driver); | |
618 | } | |
619 | module_init(s6000_i2s_init); | |
620 | ||
621 | static void __exit s6000_i2s_exit(void) | |
622 | { | |
623 | platform_driver_unregister(&s6000_i2s_driver); | |
624 | } | |
625 | module_exit(s6000_i2s_exit); | |
626 | ||
627 | MODULE_AUTHOR("Daniel Gloeckner"); | |
628 | MODULE_DESCRIPTION("Stretch s6000 family I2S SoC Interface"); | |
629 | MODULE_LICENSE("GPL"); |