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5033f43c | 1 | /* sound/soc/samsung/i2s.c |
1c7ac018 JB |
2 | * |
3 | * ALSA SoC Audio Layer - Samsung I2S Controller driver | |
4 | * | |
5 | * Copyright (c) 2010 Samsung Electronics Co. Ltd. | |
6 | * Jaswinder Singh <jassi.brar@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/io.h> | |
da155d5b | 17 | #include <linux/module.h> |
1c7ac018 | 18 | |
1c7ac018 | 19 | #include <sound/soc.h> |
0378b6ac | 20 | #include <sound/pcm_params.h> |
1c7ac018 JB |
21 | |
22 | #include <plat/audio.h> | |
23 | ||
24 | #include "dma.h" | |
61100f40 | 25 | #include "idma.h" |
1c7ac018 | 26 | #include "i2s.h" |
172a453d | 27 | #include "i2s-regs.h" |
1c7ac018 JB |
28 | |
29 | #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) | |
30 | ||
31 | struct i2s_dai { | |
32 | /* Platform device for this DAI */ | |
33 | struct platform_device *pdev; | |
34 | /* IOREMAP'd SFRs */ | |
35 | void __iomem *addr; | |
36 | /* Physical base address of SFRs */ | |
37 | u32 base; | |
38 | /* Rate of RCLK source clock */ | |
39 | unsigned long rclk_srcrate; | |
40 | /* Frame Clock */ | |
41 | unsigned frmclk; | |
42 | /* | |
43 | * Specifically requested RCLK,BCLK by MACHINE Driver. | |
44 | * 0 indicates CPU driver is free to choose any value. | |
45 | */ | |
46 | unsigned rfs, bfs; | |
47 | /* I2S Controller's core clock */ | |
48 | struct clk *clk; | |
49 | /* Clock for generating I2S signals */ | |
50 | struct clk *op_clk; | |
51 | /* Array of clock names for op_clk */ | |
52 | const char **src_clk; | |
53 | /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ | |
54 | struct i2s_dai *pri_dai; | |
55 | /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ | |
56 | struct i2s_dai *sec_dai; | |
57 | #define DAI_OPENED (1 << 0) /* Dai is opened */ | |
58 | #define DAI_MANAGER (1 << 1) /* Dai is the manager */ | |
59 | unsigned mode; | |
60 | /* Driver for this DAI */ | |
61 | struct snd_soc_dai_driver i2s_dai_drv; | |
62 | /* DMA parameters */ | |
63 | struct s3c_dma_params dma_playback; | |
64 | struct s3c_dma_params dma_capture; | |
61100f40 | 65 | struct s3c_dma_params idma_playback; |
1c7ac018 JB |
66 | u32 quirks; |
67 | u32 suspend_i2smod; | |
68 | u32 suspend_i2scon; | |
69 | u32 suspend_i2spsr; | |
70 | }; | |
71 | ||
72 | /* Lock for cross i/f checks */ | |
73 | static DEFINE_SPINLOCK(lock); | |
74 | ||
75 | /* If this is the 'overlay' stereo DAI */ | |
76 | static inline bool is_secondary(struct i2s_dai *i2s) | |
77 | { | |
78 | return i2s->pri_dai ? true : false; | |
79 | } | |
80 | ||
81 | /* If operating in SoC-Slave mode */ | |
82 | static inline bool is_slave(struct i2s_dai *i2s) | |
83 | { | |
84 | return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; | |
85 | } | |
86 | ||
87 | /* If this interface of the controller is transmitting data */ | |
88 | static inline bool tx_active(struct i2s_dai *i2s) | |
89 | { | |
90 | u32 active; | |
91 | ||
92 | if (!i2s) | |
93 | return false; | |
94 | ||
33195500 | 95 | active = readl(i2s->addr + I2SCON); |
1c7ac018 JB |
96 | |
97 | if (is_secondary(i2s)) | |
98 | active &= CON_TXSDMA_ACTIVE; | |
99 | else | |
100 | active &= CON_TXDMA_ACTIVE; | |
101 | ||
102 | return active ? true : false; | |
103 | } | |
104 | ||
105 | /* If the other interface of the controller is transmitting data */ | |
106 | static inline bool other_tx_active(struct i2s_dai *i2s) | |
107 | { | |
108 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
109 | ||
110 | return tx_active(other); | |
111 | } | |
112 | ||
113 | /* If any interface of the controller is transmitting data */ | |
114 | static inline bool any_tx_active(struct i2s_dai *i2s) | |
115 | { | |
116 | return tx_active(i2s) || other_tx_active(i2s); | |
117 | } | |
118 | ||
119 | /* If this interface of the controller is receiving data */ | |
120 | static inline bool rx_active(struct i2s_dai *i2s) | |
121 | { | |
122 | u32 active; | |
123 | ||
124 | if (!i2s) | |
125 | return false; | |
126 | ||
33195500 | 127 | active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE; |
1c7ac018 JB |
128 | |
129 | return active ? true : false; | |
130 | } | |
131 | ||
132 | /* If the other interface of the controller is receiving data */ | |
133 | static inline bool other_rx_active(struct i2s_dai *i2s) | |
134 | { | |
135 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
136 | ||
137 | return rx_active(other); | |
138 | } | |
139 | ||
140 | /* If any interface of the controller is receiving data */ | |
141 | static inline bool any_rx_active(struct i2s_dai *i2s) | |
142 | { | |
143 | return rx_active(i2s) || other_rx_active(i2s); | |
144 | } | |
145 | ||
146 | /* If the other DAI is transmitting or receiving data */ | |
147 | static inline bool other_active(struct i2s_dai *i2s) | |
148 | { | |
149 | return other_rx_active(i2s) || other_tx_active(i2s); | |
150 | } | |
151 | ||
152 | /* If this DAI is transmitting or receiving data */ | |
153 | static inline bool this_active(struct i2s_dai *i2s) | |
154 | { | |
155 | return tx_active(i2s) || rx_active(i2s); | |
156 | } | |
157 | ||
158 | /* If the controller is active anyway */ | |
159 | static inline bool any_active(struct i2s_dai *i2s) | |
160 | { | |
161 | return this_active(i2s) || other_active(i2s); | |
162 | } | |
163 | ||
164 | static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) | |
165 | { | |
166 | return snd_soc_dai_get_drvdata(dai); | |
167 | } | |
168 | ||
169 | static inline bool is_opened(struct i2s_dai *i2s) | |
170 | { | |
171 | if (i2s && (i2s->mode & DAI_OPENED)) | |
172 | return true; | |
173 | else | |
174 | return false; | |
175 | } | |
176 | ||
177 | static inline bool is_manager(struct i2s_dai *i2s) | |
178 | { | |
179 | if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) | |
180 | return true; | |
181 | else | |
182 | return false; | |
183 | } | |
184 | ||
185 | /* Read RCLK of I2S (in multiples of LRCLK) */ | |
186 | static inline unsigned get_rfs(struct i2s_dai *i2s) | |
187 | { | |
188 | u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3; | |
189 | ||
190 | switch (rfs) { | |
191 | case 3: return 768; | |
192 | case 2: return 384; | |
193 | case 1: return 512; | |
194 | default: return 256; | |
195 | } | |
196 | } | |
197 | ||
198 | /* Write RCLK of I2S (in multiples of LRCLK) */ | |
199 | static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) | |
200 | { | |
201 | u32 mod = readl(i2s->addr + I2SMOD); | |
202 | ||
203 | mod &= ~MOD_RCLK_MASK; | |
204 | ||
205 | switch (rfs) { | |
206 | case 768: | |
207 | mod |= MOD_RCLK_768FS; | |
208 | break; | |
209 | case 512: | |
210 | mod |= MOD_RCLK_512FS; | |
211 | break; | |
212 | case 384: | |
213 | mod |= MOD_RCLK_384FS; | |
214 | break; | |
215 | default: | |
216 | mod |= MOD_RCLK_256FS; | |
217 | break; | |
218 | } | |
219 | ||
220 | writel(mod, i2s->addr + I2SMOD); | |
221 | } | |
222 | ||
223 | /* Read Bit-Clock of I2S (in multiples of LRCLK) */ | |
224 | static inline unsigned get_bfs(struct i2s_dai *i2s) | |
225 | { | |
226 | u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3; | |
227 | ||
228 | switch (bfs) { | |
229 | case 3: return 24; | |
230 | case 2: return 16; | |
231 | case 1: return 48; | |
232 | default: return 32; | |
233 | } | |
234 | } | |
235 | ||
236 | /* Write Bit-Clock of I2S (in multiples of LRCLK) */ | |
237 | static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) | |
238 | { | |
239 | u32 mod = readl(i2s->addr + I2SMOD); | |
240 | ||
241 | mod &= ~MOD_BCLK_MASK; | |
242 | ||
243 | switch (bfs) { | |
244 | case 48: | |
245 | mod |= MOD_BCLK_48FS; | |
246 | break; | |
247 | case 32: | |
248 | mod |= MOD_BCLK_32FS; | |
249 | break; | |
250 | case 24: | |
251 | mod |= MOD_BCLK_24FS; | |
252 | break; | |
253 | case 16: | |
254 | mod |= MOD_BCLK_16FS; | |
255 | break; | |
256 | default: | |
257 | dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); | |
258 | return; | |
259 | } | |
260 | ||
261 | writel(mod, i2s->addr + I2SMOD); | |
262 | } | |
263 | ||
264 | /* Sample-Size */ | |
265 | static inline int get_blc(struct i2s_dai *i2s) | |
266 | { | |
267 | int blc = readl(i2s->addr + I2SMOD); | |
268 | ||
269 | blc = (blc >> 13) & 0x3; | |
270 | ||
271 | switch (blc) { | |
272 | case 2: return 24; | |
273 | case 1: return 8; | |
274 | default: return 16; | |
275 | } | |
276 | } | |
277 | ||
278 | /* TX Channel Control */ | |
279 | static void i2s_txctrl(struct i2s_dai *i2s, int on) | |
280 | { | |
281 | void __iomem *addr = i2s->addr; | |
282 | u32 con = readl(addr + I2SCON); | |
283 | u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; | |
284 | ||
285 | if (on) { | |
286 | con |= CON_ACTIVE; | |
287 | con &= ~CON_TXCH_PAUSE; | |
288 | ||
289 | if (is_secondary(i2s)) { | |
290 | con |= CON_TXSDMA_ACTIVE; | |
291 | con &= ~CON_TXSDMA_PAUSE; | |
292 | } else { | |
293 | con |= CON_TXDMA_ACTIVE; | |
294 | con &= ~CON_TXDMA_PAUSE; | |
295 | } | |
296 | ||
297 | if (any_rx_active(i2s)) | |
298 | mod |= MOD_TXRX; | |
299 | else | |
300 | mod |= MOD_TXONLY; | |
301 | } else { | |
302 | if (is_secondary(i2s)) { | |
303 | con |= CON_TXSDMA_PAUSE; | |
304 | con &= ~CON_TXSDMA_ACTIVE; | |
305 | } else { | |
306 | con |= CON_TXDMA_PAUSE; | |
307 | con &= ~CON_TXDMA_ACTIVE; | |
308 | } | |
309 | ||
310 | if (other_tx_active(i2s)) { | |
311 | writel(con, addr + I2SCON); | |
312 | return; | |
313 | } | |
314 | ||
315 | con |= CON_TXCH_PAUSE; | |
316 | ||
317 | if (any_rx_active(i2s)) | |
318 | mod |= MOD_RXONLY; | |
319 | else | |
320 | con &= ~CON_ACTIVE; | |
321 | } | |
322 | ||
323 | writel(mod, addr + I2SMOD); | |
324 | writel(con, addr + I2SCON); | |
325 | } | |
326 | ||
327 | /* RX Channel Control */ | |
328 | static void i2s_rxctrl(struct i2s_dai *i2s, int on) | |
329 | { | |
330 | void __iomem *addr = i2s->addr; | |
331 | u32 con = readl(addr + I2SCON); | |
332 | u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; | |
333 | ||
334 | if (on) { | |
335 | con |= CON_RXDMA_ACTIVE | CON_ACTIVE; | |
336 | con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); | |
337 | ||
338 | if (any_tx_active(i2s)) | |
339 | mod |= MOD_TXRX; | |
340 | else | |
341 | mod |= MOD_RXONLY; | |
342 | } else { | |
343 | con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; | |
344 | con &= ~CON_RXDMA_ACTIVE; | |
345 | ||
346 | if (any_tx_active(i2s)) | |
347 | mod |= MOD_TXONLY; | |
348 | else | |
349 | con &= ~CON_ACTIVE; | |
350 | } | |
351 | ||
352 | writel(mod, addr + I2SMOD); | |
353 | writel(con, addr + I2SCON); | |
354 | } | |
355 | ||
356 | /* Flush FIFO of an interface */ | |
357 | static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) | |
358 | { | |
359 | void __iomem *fic; | |
360 | u32 val; | |
361 | ||
362 | if (!i2s) | |
363 | return; | |
364 | ||
365 | if (is_secondary(i2s)) | |
366 | fic = i2s->addr + I2SFICS; | |
367 | else | |
368 | fic = i2s->addr + I2SFIC; | |
369 | ||
370 | /* Flush the FIFO */ | |
371 | writel(readl(fic) | flush, fic); | |
372 | ||
373 | /* Be patient */ | |
374 | val = msecs_to_loops(1) / 1000; /* 1 usec */ | |
375 | while (--val) | |
376 | cpu_relax(); | |
377 | ||
378 | writel(readl(fic) & ~flush, fic); | |
379 | } | |
380 | ||
381 | static int i2s_set_sysclk(struct snd_soc_dai *dai, | |
382 | int clk_id, unsigned int rfs, int dir) | |
383 | { | |
384 | struct i2s_dai *i2s = to_info(dai); | |
385 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
386 | u32 mod = readl(i2s->addr + I2SMOD); | |
387 | ||
388 | switch (clk_id) { | |
389 | case SAMSUNG_I2S_CDCLK: | |
390 | /* Shouldn't matter in GATING(CLOCK_IN) mode */ | |
391 | if (dir == SND_SOC_CLOCK_IN) | |
392 | rfs = 0; | |
393 | ||
394 | if ((rfs && other->rfs && (other->rfs != rfs)) || | |
395 | (any_active(i2s) && | |
396 | (((dir == SND_SOC_CLOCK_IN) | |
397 | && !(mod & MOD_CDCLKCON)) || | |
398 | ((dir == SND_SOC_CLOCK_OUT) | |
399 | && (mod & MOD_CDCLKCON))))) { | |
400 | dev_err(&i2s->pdev->dev, | |
401 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
402 | return -EAGAIN; | |
403 | } | |
404 | ||
405 | if (dir == SND_SOC_CLOCK_IN) | |
406 | mod |= MOD_CDCLKCON; | |
407 | else | |
408 | mod &= ~MOD_CDCLKCON; | |
409 | ||
410 | i2s->rfs = rfs; | |
411 | break; | |
412 | ||
413 | case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ | |
414 | case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ | |
415 | if ((i2s->quirks & QUIRK_NO_MUXPSR) | |
416 | || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) | |
417 | clk_id = 0; | |
418 | else | |
419 | clk_id = 1; | |
420 | ||
421 | if (!any_active(i2s)) { | |
422 | if (i2s->op_clk) { | |
423 | if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || | |
424 | (!clk_id && (mod & MOD_IMS_SYSMUX))) { | |
425 | clk_disable(i2s->op_clk); | |
426 | clk_put(i2s->op_clk); | |
427 | } else { | |
6ce534aa JB |
428 | i2s->rclk_srcrate = |
429 | clk_get_rate(i2s->op_clk); | |
1c7ac018 JB |
430 | return 0; |
431 | } | |
432 | } | |
433 | ||
434 | i2s->op_clk = clk_get(&i2s->pdev->dev, | |
435 | i2s->src_clk[clk_id]); | |
436 | clk_enable(i2s->op_clk); | |
437 | i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); | |
438 | ||
439 | /* Over-ride the other's */ | |
440 | if (other) { | |
441 | other->op_clk = i2s->op_clk; | |
442 | other->rclk_srcrate = i2s->rclk_srcrate; | |
443 | } | |
444 | } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) | |
445 | || (clk_id && !(mod & MOD_IMS_SYSMUX))) { | |
446 | dev_err(&i2s->pdev->dev, | |
447 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
448 | return -EAGAIN; | |
449 | } else { | |
450 | /* Call can't be on the active DAI */ | |
451 | i2s->op_clk = other->op_clk; | |
452 | i2s->rclk_srcrate = other->rclk_srcrate; | |
453 | return 0; | |
454 | } | |
455 | ||
456 | if (clk_id == 0) | |
457 | mod &= ~MOD_IMS_SYSMUX; | |
458 | else | |
459 | mod |= MOD_IMS_SYSMUX; | |
460 | break; | |
461 | ||
462 | default: | |
463 | dev_err(&i2s->pdev->dev, "We don't serve that!\n"); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | writel(mod, i2s->addr + I2SMOD); | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static int i2s_set_fmt(struct snd_soc_dai *dai, | |
473 | unsigned int fmt) | |
474 | { | |
475 | struct i2s_dai *i2s = to_info(dai); | |
476 | u32 mod = readl(i2s->addr + I2SMOD); | |
477 | u32 tmp = 0; | |
478 | ||
479 | /* Format is priority */ | |
480 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
481 | case SND_SOC_DAIFMT_RIGHT_J: | |
482 | tmp |= MOD_LR_RLOW; | |
483 | tmp |= MOD_SDF_MSB; | |
484 | break; | |
485 | case SND_SOC_DAIFMT_LEFT_J: | |
486 | tmp |= MOD_LR_RLOW; | |
487 | tmp |= MOD_SDF_LSB; | |
488 | break; | |
489 | case SND_SOC_DAIFMT_I2S: | |
490 | tmp |= MOD_SDF_IIS; | |
491 | break; | |
492 | default: | |
493 | dev_err(&i2s->pdev->dev, "Format not supported\n"); | |
494 | return -EINVAL; | |
495 | } | |
496 | ||
497 | /* | |
498 | * INV flag is relative to the FORMAT flag - if set it simply | |
499 | * flips the polarity specified by the Standard | |
500 | */ | |
501 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
502 | case SND_SOC_DAIFMT_NB_NF: | |
503 | break; | |
504 | case SND_SOC_DAIFMT_NB_IF: | |
505 | if (tmp & MOD_LR_RLOW) | |
506 | tmp &= ~MOD_LR_RLOW; | |
507 | else | |
508 | tmp |= MOD_LR_RLOW; | |
509 | break; | |
510 | default: | |
511 | dev_err(&i2s->pdev->dev, "Polarity not supported\n"); | |
512 | return -EINVAL; | |
513 | } | |
514 | ||
515 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
516 | case SND_SOC_DAIFMT_CBM_CFM: | |
517 | tmp |= MOD_SLAVE; | |
518 | break; | |
519 | case SND_SOC_DAIFMT_CBS_CFS: | |
520 | /* Set default source clock in Master mode */ | |
521 | if (i2s->rclk_srcrate == 0) | |
522 | i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, | |
523 | 0, SND_SOC_CLOCK_IN); | |
524 | break; | |
525 | default: | |
526 | dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); | |
527 | return -EINVAL; | |
528 | } | |
529 | ||
530 | if (any_active(i2s) && | |
531 | ((mod & (MOD_SDF_MASK | MOD_LR_RLOW | |
532 | | MOD_SLAVE)) != tmp)) { | |
533 | dev_err(&i2s->pdev->dev, | |
534 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
535 | return -EAGAIN; | |
536 | } | |
537 | ||
538 | mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); | |
539 | mod |= tmp; | |
540 | writel(mod, i2s->addr + I2SMOD); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | static int i2s_hw_params(struct snd_pcm_substream *substream, | |
546 | struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) | |
547 | { | |
548 | struct i2s_dai *i2s = to_info(dai); | |
549 | u32 mod = readl(i2s->addr + I2SMOD); | |
550 | ||
551 | if (!is_secondary(i2s)) | |
552 | mod &= ~(MOD_DC2_EN | MOD_DC1_EN); | |
553 | ||
554 | switch (params_channels(params)) { | |
555 | case 6: | |
556 | mod |= MOD_DC2_EN; | |
557 | case 4: | |
558 | mod |= MOD_DC1_EN; | |
559 | break; | |
560 | case 2: | |
561 | break; | |
562 | default: | |
563 | dev_err(&i2s->pdev->dev, "%d channels not supported\n", | |
564 | params_channels(params)); | |
565 | return -EINVAL; | |
566 | } | |
567 | ||
568 | if (is_secondary(i2s)) | |
569 | mod &= ~MOD_BLCS_MASK; | |
570 | else | |
571 | mod &= ~MOD_BLCP_MASK; | |
572 | ||
573 | if (is_manager(i2s)) | |
574 | mod &= ~MOD_BLC_MASK; | |
575 | ||
576 | switch (params_format(params)) { | |
577 | case SNDRV_PCM_FORMAT_S8: | |
578 | if (is_secondary(i2s)) | |
579 | mod |= MOD_BLCS_8BIT; | |
580 | else | |
581 | mod |= MOD_BLCP_8BIT; | |
582 | if (is_manager(i2s)) | |
583 | mod |= MOD_BLC_8BIT; | |
584 | break; | |
585 | case SNDRV_PCM_FORMAT_S16_LE: | |
586 | if (is_secondary(i2s)) | |
587 | mod |= MOD_BLCS_16BIT; | |
588 | else | |
589 | mod |= MOD_BLCP_16BIT; | |
590 | if (is_manager(i2s)) | |
591 | mod |= MOD_BLC_16BIT; | |
592 | break; | |
593 | case SNDRV_PCM_FORMAT_S24_LE: | |
594 | if (is_secondary(i2s)) | |
595 | mod |= MOD_BLCS_24BIT; | |
596 | else | |
597 | mod |= MOD_BLCP_24BIT; | |
598 | if (is_manager(i2s)) | |
599 | mod |= MOD_BLC_24BIT; | |
600 | break; | |
601 | default: | |
602 | dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", | |
603 | params_format(params)); | |
604 | return -EINVAL; | |
605 | } | |
606 | writel(mod, i2s->addr + I2SMOD); | |
607 | ||
608 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
609 | snd_soc_dai_set_dma_data(dai, substream, | |
610 | (void *)&i2s->dma_playback); | |
611 | else | |
612 | snd_soc_dai_set_dma_data(dai, substream, | |
613 | (void *)&i2s->dma_capture); | |
614 | ||
615 | i2s->frmclk = params_rate(params); | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | /* We set constraints on the substream acc to the version of I2S */ | |
621 | static int i2s_startup(struct snd_pcm_substream *substream, | |
622 | struct snd_soc_dai *dai) | |
623 | { | |
624 | struct i2s_dai *i2s = to_info(dai); | |
625 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
626 | unsigned long flags; | |
627 | ||
628 | spin_lock_irqsave(&lock, flags); | |
629 | ||
630 | i2s->mode |= DAI_OPENED; | |
631 | ||
632 | if (is_manager(other)) | |
633 | i2s->mode &= ~DAI_MANAGER; | |
634 | else | |
635 | i2s->mode |= DAI_MANAGER; | |
636 | ||
637 | /* Enforce set_sysclk in Master mode */ | |
638 | i2s->rclk_srcrate = 0; | |
639 | ||
640 | spin_unlock_irqrestore(&lock, flags); | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static void i2s_shutdown(struct snd_pcm_substream *substream, | |
646 | struct snd_soc_dai *dai) | |
647 | { | |
648 | struct i2s_dai *i2s = to_info(dai); | |
649 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
650 | unsigned long flags; | |
651 | ||
652 | spin_lock_irqsave(&lock, flags); | |
653 | ||
654 | i2s->mode &= ~DAI_OPENED; | |
655 | i2s->mode &= ~DAI_MANAGER; | |
656 | ||
657 | if (is_opened(other)) | |
658 | other->mode |= DAI_MANAGER; | |
659 | ||
660 | /* Reset any constraint on RFS and BFS */ | |
661 | i2s->rfs = 0; | |
662 | i2s->bfs = 0; | |
663 | ||
664 | spin_unlock_irqrestore(&lock, flags); | |
665 | ||
666 | /* Gate CDCLK by default */ | |
667 | if (!is_opened(other)) | |
668 | i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, | |
669 | 0, SND_SOC_CLOCK_IN); | |
670 | } | |
671 | ||
672 | static int config_setup(struct i2s_dai *i2s) | |
673 | { | |
674 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
675 | unsigned rfs, bfs, blc; | |
676 | u32 psr; | |
677 | ||
678 | blc = get_blc(i2s); | |
679 | ||
680 | bfs = i2s->bfs; | |
681 | ||
682 | if (!bfs && other) | |
683 | bfs = other->bfs; | |
684 | ||
685 | /* Select least possible multiple(2) if no constraint set */ | |
686 | if (!bfs) | |
687 | bfs = blc * 2; | |
688 | ||
689 | rfs = i2s->rfs; | |
690 | ||
691 | if (!rfs && other) | |
692 | rfs = other->rfs; | |
693 | ||
694 | if ((rfs == 256 || rfs == 512) && (blc == 24)) { | |
695 | dev_err(&i2s->pdev->dev, | |
696 | "%d-RFS not supported for 24-blc\n", rfs); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | if (!rfs) { | |
701 | if (bfs == 16 || bfs == 32) | |
702 | rfs = 256; | |
703 | else | |
704 | rfs = 384; | |
705 | } | |
706 | ||
707 | /* If already setup and running */ | |
708 | if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { | |
709 | dev_err(&i2s->pdev->dev, | |
710 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
711 | return -EAGAIN; | |
712 | } | |
713 | ||
714 | /* Don't bother RFS, BFS & PSR in Slave mode */ | |
715 | if (is_slave(i2s)) | |
716 | return 0; | |
717 | ||
718 | set_bfs(i2s, bfs); | |
719 | set_rfs(i2s, rfs); | |
720 | ||
721 | if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { | |
722 | psr = i2s->rclk_srcrate / i2s->frmclk / rfs; | |
723 | writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); | |
724 | dev_dbg(&i2s->pdev->dev, | |
725 | "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", | |
726 | i2s->rclk_srcrate, psr, rfs, bfs); | |
727 | } | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static int i2s_trigger(struct snd_pcm_substream *substream, | |
733 | int cmd, struct snd_soc_dai *dai) | |
734 | { | |
735 | int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
736 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
737 | struct i2s_dai *i2s = to_info(rtd->cpu_dai); | |
738 | unsigned long flags; | |
739 | ||
740 | switch (cmd) { | |
741 | case SNDRV_PCM_TRIGGER_START: | |
742 | case SNDRV_PCM_TRIGGER_RESUME: | |
743 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
744 | local_irq_save(flags); | |
745 | ||
1c7ac018 JB |
746 | if (config_setup(i2s)) { |
747 | local_irq_restore(flags); | |
748 | return -EINVAL; | |
749 | } | |
750 | ||
751 | if (capture) | |
752 | i2s_rxctrl(i2s, 1); | |
753 | else | |
754 | i2s_txctrl(i2s, 1); | |
755 | ||
756 | local_irq_restore(flags); | |
757 | break; | |
758 | case SNDRV_PCM_TRIGGER_STOP: | |
759 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
760 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
761 | local_irq_save(flags); | |
762 | ||
763 | if (capture) | |
764 | i2s_rxctrl(i2s, 0); | |
765 | else | |
766 | i2s_txctrl(i2s, 0); | |
767 | ||
775bc971 JB |
768 | if (capture) |
769 | i2s_fifo(i2s, FIC_RXFLUSH); | |
770 | else | |
771 | i2s_fifo(i2s, FIC_TXFLUSH); | |
772 | ||
1c7ac018 JB |
773 | local_irq_restore(flags); |
774 | break; | |
775 | } | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | static int i2s_set_clkdiv(struct snd_soc_dai *dai, | |
781 | int div_id, int div) | |
782 | { | |
783 | struct i2s_dai *i2s = to_info(dai); | |
784 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
785 | ||
786 | switch (div_id) { | |
787 | case SAMSUNG_I2S_DIV_BCLK: | |
788 | if ((any_active(i2s) && div && (get_bfs(i2s) != div)) | |
789 | || (other && other->bfs && (other->bfs != div))) { | |
790 | dev_err(&i2s->pdev->dev, | |
791 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
792 | return -EAGAIN; | |
793 | } | |
794 | i2s->bfs = div; | |
795 | break; | |
796 | default: | |
797 | dev_err(&i2s->pdev->dev, | |
798 | "Invalid clock divider(%d)\n", div_id); | |
799 | return -EINVAL; | |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | static snd_pcm_sframes_t | |
806 | i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) | |
807 | { | |
808 | struct i2s_dai *i2s = to_info(dai); | |
809 | u32 reg = readl(i2s->addr + I2SFIC); | |
810 | snd_pcm_sframes_t delay; | |
811 | ||
812 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
813 | delay = FIC_RXCOUNT(reg); | |
814 | else if (is_secondary(i2s)) | |
815 | delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); | |
816 | else | |
817 | delay = FIC_TXCOUNT(reg); | |
818 | ||
819 | return delay; | |
820 | } | |
821 | ||
822 | #ifdef CONFIG_PM | |
823 | static int i2s_suspend(struct snd_soc_dai *dai) | |
824 | { | |
825 | struct i2s_dai *i2s = to_info(dai); | |
826 | ||
827 | if (dai->active) { | |
828 | i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); | |
829 | i2s->suspend_i2scon = readl(i2s->addr + I2SCON); | |
830 | i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); | |
831 | } | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static int i2s_resume(struct snd_soc_dai *dai) | |
837 | { | |
838 | struct i2s_dai *i2s = to_info(dai); | |
839 | ||
840 | if (dai->active) { | |
841 | writel(i2s->suspend_i2scon, i2s->addr + I2SCON); | |
842 | writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); | |
843 | writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); | |
844 | } | |
845 | ||
846 | return 0; | |
847 | } | |
848 | #else | |
849 | #define i2s_suspend NULL | |
850 | #define i2s_resume NULL | |
851 | #endif | |
852 | ||
853 | static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) | |
854 | { | |
855 | struct i2s_dai *i2s = to_info(dai); | |
856 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
857 | ||
858 | if (other && other->clk) /* If this is probe on secondary */ | |
859 | goto probe_exit; | |
860 | ||
861 | i2s->addr = ioremap(i2s->base, 0x100); | |
862 | if (i2s->addr == NULL) { | |
863 | dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); | |
864 | return -ENXIO; | |
865 | } | |
866 | ||
867 | i2s->clk = clk_get(&i2s->pdev->dev, "iis"); | |
868 | if (IS_ERR(i2s->clk)) { | |
869 | dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); | |
870 | iounmap(i2s->addr); | |
871 | return -ENOENT; | |
872 | } | |
873 | clk_enable(i2s->clk); | |
874 | ||
875 | if (other) { | |
876 | other->addr = i2s->addr; | |
877 | other->clk = i2s->clk; | |
878 | } | |
879 | ||
880 | if (i2s->quirks & QUIRK_NEED_RSTCLR) | |
881 | writel(CON_RSTCLR, i2s->addr + I2SCON); | |
882 | ||
61100f40 | 883 | if (i2s->quirks & QUIRK_SEC_DAI) |
9b8f5695 | 884 | idma_reg_addr_init(i2s->addr, |
61100f40 SK |
885 | i2s->sec_dai->idma_playback.dma_addr); |
886 | ||
1c7ac018 JB |
887 | probe_exit: |
888 | /* Reset any constraint on RFS and BFS */ | |
889 | i2s->rfs = 0; | |
890 | i2s->bfs = 0; | |
891 | i2s_txctrl(i2s, 0); | |
892 | i2s_rxctrl(i2s, 0); | |
893 | i2s_fifo(i2s, FIC_TXFLUSH); | |
894 | i2s_fifo(other, FIC_TXFLUSH); | |
895 | i2s_fifo(i2s, FIC_RXFLUSH); | |
896 | ||
897 | /* Gate CDCLK by default */ | |
898 | if (!is_opened(other)) | |
899 | i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, | |
900 | 0, SND_SOC_CLOCK_IN); | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) | |
906 | { | |
907 | struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); | |
908 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
909 | ||
910 | if (!other || !other->clk) { | |
911 | ||
912 | if (i2s->quirks & QUIRK_NEED_RSTCLR) | |
913 | writel(0, i2s->addr + I2SCON); | |
914 | ||
915 | clk_disable(i2s->clk); | |
916 | clk_put(i2s->clk); | |
917 | ||
918 | iounmap(i2s->addr); | |
919 | } | |
920 | ||
921 | i2s->clk = NULL; | |
922 | ||
923 | return 0; | |
924 | } | |
925 | ||
85e7652d | 926 | static const struct snd_soc_dai_ops samsung_i2s_dai_ops = { |
1c7ac018 JB |
927 | .trigger = i2s_trigger, |
928 | .hw_params = i2s_hw_params, | |
929 | .set_fmt = i2s_set_fmt, | |
930 | .set_clkdiv = i2s_set_clkdiv, | |
931 | .set_sysclk = i2s_set_sysclk, | |
932 | .startup = i2s_startup, | |
933 | .shutdown = i2s_shutdown, | |
934 | .delay = i2s_delay, | |
935 | }; | |
936 | ||
937 | #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 | |
938 | ||
939 | #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ | |
940 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
941 | SNDRV_PCM_FMTBIT_S24_LE) | |
942 | ||
943 | static __devinit | |
944 | struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) | |
945 | { | |
946 | struct i2s_dai *i2s; | |
947 | ||
b960ce74 | 948 | i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL); |
1c7ac018 JB |
949 | if (i2s == NULL) |
950 | return NULL; | |
951 | ||
952 | i2s->pdev = pdev; | |
953 | i2s->pri_dai = NULL; | |
954 | i2s->sec_dai = NULL; | |
955 | i2s->i2s_dai_drv.symmetric_rates = 1; | |
956 | i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; | |
957 | i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; | |
958 | i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; | |
959 | i2s->i2s_dai_drv.suspend = i2s_suspend; | |
960 | i2s->i2s_dai_drv.resume = i2s_resume; | |
961 | i2s->i2s_dai_drv.playback.channels_min = 2; | |
962 | i2s->i2s_dai_drv.playback.channels_max = 2; | |
963 | i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; | |
964 | i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; | |
965 | ||
966 | if (!sec) { | |
967 | i2s->i2s_dai_drv.capture.channels_min = 2; | |
968 | i2s->i2s_dai_drv.capture.channels_max = 2; | |
969 | i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; | |
970 | i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; | |
971 | } else { /* Create a new platform_device for Secondary */ | |
972 | i2s->pdev = platform_device_register_resndata(NULL, | |
973 | pdev->name, pdev->id + SAMSUNG_I2S_SECOFF, | |
974 | NULL, 0, NULL, 0); | |
b960ce74 | 975 | if (IS_ERR(i2s->pdev)) |
1c7ac018 | 976 | return NULL; |
1c7ac018 JB |
977 | } |
978 | ||
979 | /* Pre-assign snd_soc_dai_set_drvdata */ | |
980 | dev_set_drvdata(&i2s->pdev->dev, i2s); | |
981 | ||
982 | return i2s; | |
983 | } | |
984 | ||
985 | static __devinit int samsung_i2s_probe(struct platform_device *pdev) | |
986 | { | |
987 | u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan; | |
988 | struct i2s_dai *pri_dai, *sec_dai = NULL; | |
989 | struct s3c_audio_pdata *i2s_pdata; | |
990 | struct samsung_i2s *i2s_cfg; | |
991 | struct resource *res; | |
992 | u32 regs_base, quirks; | |
993 | int ret = 0; | |
994 | ||
995 | /* Call during Seconday interface registration */ | |
996 | if (pdev->id >= SAMSUNG_I2S_SECOFF) { | |
997 | sec_dai = dev_get_drvdata(&pdev->dev); | |
998 | snd_soc_register_dai(&sec_dai->pdev->dev, | |
999 | &sec_dai->i2s_dai_drv); | |
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | i2s_pdata = pdev->dev.platform_data; | |
1004 | if (i2s_pdata == NULL) { | |
1005 | dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); | |
1006 | return -EINVAL; | |
1007 | } | |
1008 | ||
1009 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1010 | if (!res) { | |
1011 | dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); | |
1012 | return -ENXIO; | |
1013 | } | |
1014 | dma_pl_chan = res->start; | |
1015 | ||
1016 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1017 | if (!res) { | |
1018 | dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n"); | |
1019 | return -ENXIO; | |
1020 | } | |
1021 | dma_cp_chan = res->start; | |
1022 | ||
1023 | res = platform_get_resource(pdev, IORESOURCE_DMA, 2); | |
1024 | if (res) | |
1025 | dma_pl_sec_chan = res->start; | |
1026 | else | |
1027 | dma_pl_sec_chan = 0; | |
1028 | ||
1029 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1030 | if (!res) { | |
1031 | dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); | |
1032 | return -ENXIO; | |
1033 | } | |
1034 | ||
1035 | if (!request_mem_region(res->start, resource_size(res), | |
1036 | "samsung-i2s")) { | |
1037 | dev_err(&pdev->dev, "Unable to request SFR region\n"); | |
1038 | return -EBUSY; | |
1039 | } | |
1040 | regs_base = res->start; | |
1041 | ||
1042 | i2s_cfg = &i2s_pdata->type.i2s; | |
1043 | quirks = i2s_cfg->quirks; | |
1044 | ||
1045 | pri_dai = i2s_alloc_dai(pdev, false); | |
1046 | if (!pri_dai) { | |
1047 | dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); | |
1048 | ret = -ENOMEM; | |
b960ce74 | 1049 | goto err; |
1c7ac018 JB |
1050 | } |
1051 | ||
1052 | pri_dai->dma_playback.dma_addr = regs_base + I2STXD; | |
1053 | pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; | |
1054 | pri_dai->dma_playback.client = | |
1055 | (struct s3c2410_dma_client *)&pri_dai->dma_playback; | |
1056 | pri_dai->dma_capture.client = | |
1057 | (struct s3c2410_dma_client *)&pri_dai->dma_capture; | |
1058 | pri_dai->dma_playback.channel = dma_pl_chan; | |
1059 | pri_dai->dma_capture.channel = dma_cp_chan; | |
1060 | pri_dai->src_clk = i2s_cfg->src_clk; | |
1061 | pri_dai->dma_playback.dma_size = 4; | |
1062 | pri_dai->dma_capture.dma_size = 4; | |
1063 | pri_dai->base = regs_base; | |
1064 | pri_dai->quirks = quirks; | |
1065 | ||
1066 | if (quirks & QUIRK_PRI_6CHAN) | |
1067 | pri_dai->i2s_dai_drv.playback.channels_max = 6; | |
1068 | ||
1069 | if (quirks & QUIRK_SEC_DAI) { | |
1070 | sec_dai = i2s_alloc_dai(pdev, true); | |
1071 | if (!sec_dai) { | |
1072 | dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); | |
1073 | ret = -ENOMEM; | |
b960ce74 | 1074 | goto err; |
1c7ac018 JB |
1075 | } |
1076 | sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; | |
1077 | sec_dai->dma_playback.client = | |
1078 | (struct s3c2410_dma_client *)&sec_dai->dma_playback; | |
1079 | /* Use iDMA always if SysDMA not provided */ | |
1080 | sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1; | |
1081 | sec_dai->src_clk = i2s_cfg->src_clk; | |
1082 | sec_dai->dma_playback.dma_size = 4; | |
1083 | sec_dai->base = regs_base; | |
1084 | sec_dai->quirks = quirks; | |
61100f40 | 1085 | sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr; |
1c7ac018 JB |
1086 | sec_dai->pri_dai = pri_dai; |
1087 | pri_dai->sec_dai = sec_dai; | |
1088 | } | |
1089 | ||
1090 | if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { | |
1091 | dev_err(&pdev->dev, "Unable to configure gpio\n"); | |
1092 | ret = -EINVAL; | |
b960ce74 | 1093 | goto err; |
1c7ac018 JB |
1094 | } |
1095 | ||
1096 | snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); | |
1097 | ||
1098 | return 0; | |
b960ce74 | 1099 | err: |
1c7ac018 JB |
1100 | release_mem_region(regs_base, resource_size(res)); |
1101 | ||
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | static __devexit int samsung_i2s_remove(struct platform_device *pdev) | |
1106 | { | |
1107 | struct i2s_dai *i2s, *other; | |
1108 | ||
1109 | i2s = dev_get_drvdata(&pdev->dev); | |
1110 | other = i2s->pri_dai ? : i2s->sec_dai; | |
1111 | ||
1112 | if (other) { | |
1113 | other->pri_dai = NULL; | |
1114 | other->sec_dai = NULL; | |
1115 | } else { | |
1116 | struct resource *res; | |
1117 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1118 | if (res) | |
1119 | release_mem_region(res->start, resource_size(res)); | |
1120 | } | |
1121 | ||
1122 | i2s->pri_dai = NULL; | |
1123 | i2s->sec_dai = NULL; | |
1124 | ||
1c7ac018 JB |
1125 | snd_soc_unregister_dai(&pdev->dev); |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | static struct platform_driver samsung_i2s_driver = { | |
1131 | .probe = samsung_i2s_probe, | |
c4c5839f | 1132 | .remove = __devexit_p(samsung_i2s_remove), |
1c7ac018 JB |
1133 | .driver = { |
1134 | .name = "samsung-i2s", | |
1135 | .owner = THIS_MODULE, | |
1136 | }, | |
1137 | }; | |
1138 | ||
e00c3f55 | 1139 | module_platform_driver(samsung_i2s_driver); |
1c7ac018 JB |
1140 | |
1141 | /* Module information */ | |
1142 | MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); | |
1143 | MODULE_DESCRIPTION("Samsung I2S Interface"); | |
1144 | MODULE_ALIAS("platform:samsung-i2s"); | |
1145 | MODULE_LICENSE("GPL"); |