Commit | Line | Data |
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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> | |
17 | ||
1c7ac018 | 18 | #include <sound/soc.h> |
0378b6ac | 19 | #include <sound/pcm_params.h> |
1c7ac018 JB |
20 | |
21 | #include <plat/audio.h> | |
22 | ||
23 | #include "dma.h" | |
24 | #include "i2s.h" | |
172a453d | 25 | #include "i2s-regs.h" |
1c7ac018 JB |
26 | |
27 | #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) | |
28 | ||
29 | struct i2s_dai { | |
30 | /* Platform device for this DAI */ | |
31 | struct platform_device *pdev; | |
32 | /* IOREMAP'd SFRs */ | |
33 | void __iomem *addr; | |
34 | /* Physical base address of SFRs */ | |
35 | u32 base; | |
36 | /* Rate of RCLK source clock */ | |
37 | unsigned long rclk_srcrate; | |
38 | /* Frame Clock */ | |
39 | unsigned frmclk; | |
40 | /* | |
41 | * Specifically requested RCLK,BCLK by MACHINE Driver. | |
42 | * 0 indicates CPU driver is free to choose any value. | |
43 | */ | |
44 | unsigned rfs, bfs; | |
45 | /* I2S Controller's core clock */ | |
46 | struct clk *clk; | |
47 | /* Clock for generating I2S signals */ | |
48 | struct clk *op_clk; | |
49 | /* Array of clock names for op_clk */ | |
50 | const char **src_clk; | |
51 | /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */ | |
52 | struct i2s_dai *pri_dai; | |
53 | /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */ | |
54 | struct i2s_dai *sec_dai; | |
55 | #define DAI_OPENED (1 << 0) /* Dai is opened */ | |
56 | #define DAI_MANAGER (1 << 1) /* Dai is the manager */ | |
57 | unsigned mode; | |
58 | /* Driver for this DAI */ | |
59 | struct snd_soc_dai_driver i2s_dai_drv; | |
60 | /* DMA parameters */ | |
61 | struct s3c_dma_params dma_playback; | |
62 | struct s3c_dma_params dma_capture; | |
63 | u32 quirks; | |
64 | u32 suspend_i2smod; | |
65 | u32 suspend_i2scon; | |
66 | u32 suspend_i2spsr; | |
67 | }; | |
68 | ||
69 | /* Lock for cross i/f checks */ | |
70 | static DEFINE_SPINLOCK(lock); | |
71 | ||
72 | /* If this is the 'overlay' stereo DAI */ | |
73 | static inline bool is_secondary(struct i2s_dai *i2s) | |
74 | { | |
75 | return i2s->pri_dai ? true : false; | |
76 | } | |
77 | ||
78 | /* If operating in SoC-Slave mode */ | |
79 | static inline bool is_slave(struct i2s_dai *i2s) | |
80 | { | |
81 | return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false; | |
82 | } | |
83 | ||
84 | /* If this interface of the controller is transmitting data */ | |
85 | static inline bool tx_active(struct i2s_dai *i2s) | |
86 | { | |
87 | u32 active; | |
88 | ||
89 | if (!i2s) | |
90 | return false; | |
91 | ||
33195500 | 92 | active = readl(i2s->addr + I2SCON); |
1c7ac018 JB |
93 | |
94 | if (is_secondary(i2s)) | |
95 | active &= CON_TXSDMA_ACTIVE; | |
96 | else | |
97 | active &= CON_TXDMA_ACTIVE; | |
98 | ||
99 | return active ? true : false; | |
100 | } | |
101 | ||
102 | /* If the other interface of the controller is transmitting data */ | |
103 | static inline bool other_tx_active(struct i2s_dai *i2s) | |
104 | { | |
105 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
106 | ||
107 | return tx_active(other); | |
108 | } | |
109 | ||
110 | /* If any interface of the controller is transmitting data */ | |
111 | static inline bool any_tx_active(struct i2s_dai *i2s) | |
112 | { | |
113 | return tx_active(i2s) || other_tx_active(i2s); | |
114 | } | |
115 | ||
116 | /* If this interface of the controller is receiving data */ | |
117 | static inline bool rx_active(struct i2s_dai *i2s) | |
118 | { | |
119 | u32 active; | |
120 | ||
121 | if (!i2s) | |
122 | return false; | |
123 | ||
33195500 | 124 | active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE; |
1c7ac018 JB |
125 | |
126 | return active ? true : false; | |
127 | } | |
128 | ||
129 | /* If the other interface of the controller is receiving data */ | |
130 | static inline bool other_rx_active(struct i2s_dai *i2s) | |
131 | { | |
132 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
133 | ||
134 | return rx_active(other); | |
135 | } | |
136 | ||
137 | /* If any interface of the controller is receiving data */ | |
138 | static inline bool any_rx_active(struct i2s_dai *i2s) | |
139 | { | |
140 | return rx_active(i2s) || other_rx_active(i2s); | |
141 | } | |
142 | ||
143 | /* If the other DAI is transmitting or receiving data */ | |
144 | static inline bool other_active(struct i2s_dai *i2s) | |
145 | { | |
146 | return other_rx_active(i2s) || other_tx_active(i2s); | |
147 | } | |
148 | ||
149 | /* If this DAI is transmitting or receiving data */ | |
150 | static inline bool this_active(struct i2s_dai *i2s) | |
151 | { | |
152 | return tx_active(i2s) || rx_active(i2s); | |
153 | } | |
154 | ||
155 | /* If the controller is active anyway */ | |
156 | static inline bool any_active(struct i2s_dai *i2s) | |
157 | { | |
158 | return this_active(i2s) || other_active(i2s); | |
159 | } | |
160 | ||
161 | static inline struct i2s_dai *to_info(struct snd_soc_dai *dai) | |
162 | { | |
163 | return snd_soc_dai_get_drvdata(dai); | |
164 | } | |
165 | ||
166 | static inline bool is_opened(struct i2s_dai *i2s) | |
167 | { | |
168 | if (i2s && (i2s->mode & DAI_OPENED)) | |
169 | return true; | |
170 | else | |
171 | return false; | |
172 | } | |
173 | ||
174 | static inline bool is_manager(struct i2s_dai *i2s) | |
175 | { | |
176 | if (is_opened(i2s) && (i2s->mode & DAI_MANAGER)) | |
177 | return true; | |
178 | else | |
179 | return false; | |
180 | } | |
181 | ||
182 | /* Read RCLK of I2S (in multiples of LRCLK) */ | |
183 | static inline unsigned get_rfs(struct i2s_dai *i2s) | |
184 | { | |
185 | u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3; | |
186 | ||
187 | switch (rfs) { | |
188 | case 3: return 768; | |
189 | case 2: return 384; | |
190 | case 1: return 512; | |
191 | default: return 256; | |
192 | } | |
193 | } | |
194 | ||
195 | /* Write RCLK of I2S (in multiples of LRCLK) */ | |
196 | static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs) | |
197 | { | |
198 | u32 mod = readl(i2s->addr + I2SMOD); | |
199 | ||
200 | mod &= ~MOD_RCLK_MASK; | |
201 | ||
202 | switch (rfs) { | |
203 | case 768: | |
204 | mod |= MOD_RCLK_768FS; | |
205 | break; | |
206 | case 512: | |
207 | mod |= MOD_RCLK_512FS; | |
208 | break; | |
209 | case 384: | |
210 | mod |= MOD_RCLK_384FS; | |
211 | break; | |
212 | default: | |
213 | mod |= MOD_RCLK_256FS; | |
214 | break; | |
215 | } | |
216 | ||
217 | writel(mod, i2s->addr + I2SMOD); | |
218 | } | |
219 | ||
220 | /* Read Bit-Clock of I2S (in multiples of LRCLK) */ | |
221 | static inline unsigned get_bfs(struct i2s_dai *i2s) | |
222 | { | |
223 | u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3; | |
224 | ||
225 | switch (bfs) { | |
226 | case 3: return 24; | |
227 | case 2: return 16; | |
228 | case 1: return 48; | |
229 | default: return 32; | |
230 | } | |
231 | } | |
232 | ||
233 | /* Write Bit-Clock of I2S (in multiples of LRCLK) */ | |
234 | static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs) | |
235 | { | |
236 | u32 mod = readl(i2s->addr + I2SMOD); | |
237 | ||
238 | mod &= ~MOD_BCLK_MASK; | |
239 | ||
240 | switch (bfs) { | |
241 | case 48: | |
242 | mod |= MOD_BCLK_48FS; | |
243 | break; | |
244 | case 32: | |
245 | mod |= MOD_BCLK_32FS; | |
246 | break; | |
247 | case 24: | |
248 | mod |= MOD_BCLK_24FS; | |
249 | break; | |
250 | case 16: | |
251 | mod |= MOD_BCLK_16FS; | |
252 | break; | |
253 | default: | |
254 | dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n"); | |
255 | return; | |
256 | } | |
257 | ||
258 | writel(mod, i2s->addr + I2SMOD); | |
259 | } | |
260 | ||
261 | /* Sample-Size */ | |
262 | static inline int get_blc(struct i2s_dai *i2s) | |
263 | { | |
264 | int blc = readl(i2s->addr + I2SMOD); | |
265 | ||
266 | blc = (blc >> 13) & 0x3; | |
267 | ||
268 | switch (blc) { | |
269 | case 2: return 24; | |
270 | case 1: return 8; | |
271 | default: return 16; | |
272 | } | |
273 | } | |
274 | ||
275 | /* TX Channel Control */ | |
276 | static void i2s_txctrl(struct i2s_dai *i2s, int on) | |
277 | { | |
278 | void __iomem *addr = i2s->addr; | |
279 | u32 con = readl(addr + I2SCON); | |
280 | u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; | |
281 | ||
282 | if (on) { | |
283 | con |= CON_ACTIVE; | |
284 | con &= ~CON_TXCH_PAUSE; | |
285 | ||
286 | if (is_secondary(i2s)) { | |
287 | con |= CON_TXSDMA_ACTIVE; | |
288 | con &= ~CON_TXSDMA_PAUSE; | |
289 | } else { | |
290 | con |= CON_TXDMA_ACTIVE; | |
291 | con &= ~CON_TXDMA_PAUSE; | |
292 | } | |
293 | ||
294 | if (any_rx_active(i2s)) | |
295 | mod |= MOD_TXRX; | |
296 | else | |
297 | mod |= MOD_TXONLY; | |
298 | } else { | |
299 | if (is_secondary(i2s)) { | |
300 | con |= CON_TXSDMA_PAUSE; | |
301 | con &= ~CON_TXSDMA_ACTIVE; | |
302 | } else { | |
303 | con |= CON_TXDMA_PAUSE; | |
304 | con &= ~CON_TXDMA_ACTIVE; | |
305 | } | |
306 | ||
307 | if (other_tx_active(i2s)) { | |
308 | writel(con, addr + I2SCON); | |
309 | return; | |
310 | } | |
311 | ||
312 | con |= CON_TXCH_PAUSE; | |
313 | ||
314 | if (any_rx_active(i2s)) | |
315 | mod |= MOD_RXONLY; | |
316 | else | |
317 | con &= ~CON_ACTIVE; | |
318 | } | |
319 | ||
320 | writel(mod, addr + I2SMOD); | |
321 | writel(con, addr + I2SCON); | |
322 | } | |
323 | ||
324 | /* RX Channel Control */ | |
325 | static void i2s_rxctrl(struct i2s_dai *i2s, int on) | |
326 | { | |
327 | void __iomem *addr = i2s->addr; | |
328 | u32 con = readl(addr + I2SCON); | |
329 | u32 mod = readl(addr + I2SMOD) & ~MOD_MASK; | |
330 | ||
331 | if (on) { | |
332 | con |= CON_RXDMA_ACTIVE | CON_ACTIVE; | |
333 | con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE); | |
334 | ||
335 | if (any_tx_active(i2s)) | |
336 | mod |= MOD_TXRX; | |
337 | else | |
338 | mod |= MOD_RXONLY; | |
339 | } else { | |
340 | con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE; | |
341 | con &= ~CON_RXDMA_ACTIVE; | |
342 | ||
343 | if (any_tx_active(i2s)) | |
344 | mod |= MOD_TXONLY; | |
345 | else | |
346 | con &= ~CON_ACTIVE; | |
347 | } | |
348 | ||
349 | writel(mod, addr + I2SMOD); | |
350 | writel(con, addr + I2SCON); | |
351 | } | |
352 | ||
353 | /* Flush FIFO of an interface */ | |
354 | static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush) | |
355 | { | |
356 | void __iomem *fic; | |
357 | u32 val; | |
358 | ||
359 | if (!i2s) | |
360 | return; | |
361 | ||
362 | if (is_secondary(i2s)) | |
363 | fic = i2s->addr + I2SFICS; | |
364 | else | |
365 | fic = i2s->addr + I2SFIC; | |
366 | ||
367 | /* Flush the FIFO */ | |
368 | writel(readl(fic) | flush, fic); | |
369 | ||
370 | /* Be patient */ | |
371 | val = msecs_to_loops(1) / 1000; /* 1 usec */ | |
372 | while (--val) | |
373 | cpu_relax(); | |
374 | ||
375 | writel(readl(fic) & ~flush, fic); | |
376 | } | |
377 | ||
378 | static int i2s_set_sysclk(struct snd_soc_dai *dai, | |
379 | int clk_id, unsigned int rfs, int dir) | |
380 | { | |
381 | struct i2s_dai *i2s = to_info(dai); | |
382 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
383 | u32 mod = readl(i2s->addr + I2SMOD); | |
384 | ||
385 | switch (clk_id) { | |
386 | case SAMSUNG_I2S_CDCLK: | |
387 | /* Shouldn't matter in GATING(CLOCK_IN) mode */ | |
388 | if (dir == SND_SOC_CLOCK_IN) | |
389 | rfs = 0; | |
390 | ||
391 | if ((rfs && other->rfs && (other->rfs != rfs)) || | |
392 | (any_active(i2s) && | |
393 | (((dir == SND_SOC_CLOCK_IN) | |
394 | && !(mod & MOD_CDCLKCON)) || | |
395 | ((dir == SND_SOC_CLOCK_OUT) | |
396 | && (mod & MOD_CDCLKCON))))) { | |
397 | dev_err(&i2s->pdev->dev, | |
398 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
399 | return -EAGAIN; | |
400 | } | |
401 | ||
402 | if (dir == SND_SOC_CLOCK_IN) | |
403 | mod |= MOD_CDCLKCON; | |
404 | else | |
405 | mod &= ~MOD_CDCLKCON; | |
406 | ||
407 | i2s->rfs = rfs; | |
408 | break; | |
409 | ||
410 | case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */ | |
411 | case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */ | |
412 | if ((i2s->quirks & QUIRK_NO_MUXPSR) | |
413 | || (clk_id == SAMSUNG_I2S_RCLKSRC_0)) | |
414 | clk_id = 0; | |
415 | else | |
416 | clk_id = 1; | |
417 | ||
418 | if (!any_active(i2s)) { | |
419 | if (i2s->op_clk) { | |
420 | if ((clk_id && !(mod & MOD_IMS_SYSMUX)) || | |
421 | (!clk_id && (mod & MOD_IMS_SYSMUX))) { | |
422 | clk_disable(i2s->op_clk); | |
423 | clk_put(i2s->op_clk); | |
424 | } else { | |
6ce534aa JB |
425 | i2s->rclk_srcrate = |
426 | clk_get_rate(i2s->op_clk); | |
1c7ac018 JB |
427 | return 0; |
428 | } | |
429 | } | |
430 | ||
431 | i2s->op_clk = clk_get(&i2s->pdev->dev, | |
432 | i2s->src_clk[clk_id]); | |
433 | clk_enable(i2s->op_clk); | |
434 | i2s->rclk_srcrate = clk_get_rate(i2s->op_clk); | |
435 | ||
436 | /* Over-ride the other's */ | |
437 | if (other) { | |
438 | other->op_clk = i2s->op_clk; | |
439 | other->rclk_srcrate = i2s->rclk_srcrate; | |
440 | } | |
441 | } else if ((!clk_id && (mod & MOD_IMS_SYSMUX)) | |
442 | || (clk_id && !(mod & MOD_IMS_SYSMUX))) { | |
443 | dev_err(&i2s->pdev->dev, | |
444 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
445 | return -EAGAIN; | |
446 | } else { | |
447 | /* Call can't be on the active DAI */ | |
448 | i2s->op_clk = other->op_clk; | |
449 | i2s->rclk_srcrate = other->rclk_srcrate; | |
450 | return 0; | |
451 | } | |
452 | ||
453 | if (clk_id == 0) | |
454 | mod &= ~MOD_IMS_SYSMUX; | |
455 | else | |
456 | mod |= MOD_IMS_SYSMUX; | |
457 | break; | |
458 | ||
459 | default: | |
460 | dev_err(&i2s->pdev->dev, "We don't serve that!\n"); | |
461 | return -EINVAL; | |
462 | } | |
463 | ||
464 | writel(mod, i2s->addr + I2SMOD); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | static int i2s_set_fmt(struct snd_soc_dai *dai, | |
470 | unsigned int fmt) | |
471 | { | |
472 | struct i2s_dai *i2s = to_info(dai); | |
473 | u32 mod = readl(i2s->addr + I2SMOD); | |
474 | u32 tmp = 0; | |
475 | ||
476 | /* Format is priority */ | |
477 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
478 | case SND_SOC_DAIFMT_RIGHT_J: | |
479 | tmp |= MOD_LR_RLOW; | |
480 | tmp |= MOD_SDF_MSB; | |
481 | break; | |
482 | case SND_SOC_DAIFMT_LEFT_J: | |
483 | tmp |= MOD_LR_RLOW; | |
484 | tmp |= MOD_SDF_LSB; | |
485 | break; | |
486 | case SND_SOC_DAIFMT_I2S: | |
487 | tmp |= MOD_SDF_IIS; | |
488 | break; | |
489 | default: | |
490 | dev_err(&i2s->pdev->dev, "Format not supported\n"); | |
491 | return -EINVAL; | |
492 | } | |
493 | ||
494 | /* | |
495 | * INV flag is relative to the FORMAT flag - if set it simply | |
496 | * flips the polarity specified by the Standard | |
497 | */ | |
498 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
499 | case SND_SOC_DAIFMT_NB_NF: | |
500 | break; | |
501 | case SND_SOC_DAIFMT_NB_IF: | |
502 | if (tmp & MOD_LR_RLOW) | |
503 | tmp &= ~MOD_LR_RLOW; | |
504 | else | |
505 | tmp |= MOD_LR_RLOW; | |
506 | break; | |
507 | default: | |
508 | dev_err(&i2s->pdev->dev, "Polarity not supported\n"); | |
509 | return -EINVAL; | |
510 | } | |
511 | ||
512 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
513 | case SND_SOC_DAIFMT_CBM_CFM: | |
514 | tmp |= MOD_SLAVE; | |
515 | break; | |
516 | case SND_SOC_DAIFMT_CBS_CFS: | |
517 | /* Set default source clock in Master mode */ | |
518 | if (i2s->rclk_srcrate == 0) | |
519 | i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0, | |
520 | 0, SND_SOC_CLOCK_IN); | |
521 | break; | |
522 | default: | |
523 | dev_err(&i2s->pdev->dev, "master/slave format not supported\n"); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | if (any_active(i2s) && | |
528 | ((mod & (MOD_SDF_MASK | MOD_LR_RLOW | |
529 | | MOD_SLAVE)) != tmp)) { | |
530 | dev_err(&i2s->pdev->dev, | |
531 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
532 | return -EAGAIN; | |
533 | } | |
534 | ||
535 | mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE); | |
536 | mod |= tmp; | |
537 | writel(mod, i2s->addr + I2SMOD); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | static int i2s_hw_params(struct snd_pcm_substream *substream, | |
543 | struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) | |
544 | { | |
545 | struct i2s_dai *i2s = to_info(dai); | |
546 | u32 mod = readl(i2s->addr + I2SMOD); | |
547 | ||
548 | if (!is_secondary(i2s)) | |
549 | mod &= ~(MOD_DC2_EN | MOD_DC1_EN); | |
550 | ||
551 | switch (params_channels(params)) { | |
552 | case 6: | |
553 | mod |= MOD_DC2_EN; | |
554 | case 4: | |
555 | mod |= MOD_DC1_EN; | |
556 | break; | |
557 | case 2: | |
558 | break; | |
559 | default: | |
560 | dev_err(&i2s->pdev->dev, "%d channels not supported\n", | |
561 | params_channels(params)); | |
562 | return -EINVAL; | |
563 | } | |
564 | ||
565 | if (is_secondary(i2s)) | |
566 | mod &= ~MOD_BLCS_MASK; | |
567 | else | |
568 | mod &= ~MOD_BLCP_MASK; | |
569 | ||
570 | if (is_manager(i2s)) | |
571 | mod &= ~MOD_BLC_MASK; | |
572 | ||
573 | switch (params_format(params)) { | |
574 | case SNDRV_PCM_FORMAT_S8: | |
575 | if (is_secondary(i2s)) | |
576 | mod |= MOD_BLCS_8BIT; | |
577 | else | |
578 | mod |= MOD_BLCP_8BIT; | |
579 | if (is_manager(i2s)) | |
580 | mod |= MOD_BLC_8BIT; | |
581 | break; | |
582 | case SNDRV_PCM_FORMAT_S16_LE: | |
583 | if (is_secondary(i2s)) | |
584 | mod |= MOD_BLCS_16BIT; | |
585 | else | |
586 | mod |= MOD_BLCP_16BIT; | |
587 | if (is_manager(i2s)) | |
588 | mod |= MOD_BLC_16BIT; | |
589 | break; | |
590 | case SNDRV_PCM_FORMAT_S24_LE: | |
591 | if (is_secondary(i2s)) | |
592 | mod |= MOD_BLCS_24BIT; | |
593 | else | |
594 | mod |= MOD_BLCP_24BIT; | |
595 | if (is_manager(i2s)) | |
596 | mod |= MOD_BLC_24BIT; | |
597 | break; | |
598 | default: | |
599 | dev_err(&i2s->pdev->dev, "Format(%d) not supported\n", | |
600 | params_format(params)); | |
601 | return -EINVAL; | |
602 | } | |
603 | writel(mod, i2s->addr + I2SMOD); | |
604 | ||
605 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
606 | snd_soc_dai_set_dma_data(dai, substream, | |
607 | (void *)&i2s->dma_playback); | |
608 | else | |
609 | snd_soc_dai_set_dma_data(dai, substream, | |
610 | (void *)&i2s->dma_capture); | |
611 | ||
612 | i2s->frmclk = params_rate(params); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | /* We set constraints on the substream acc to the version of I2S */ | |
618 | static int i2s_startup(struct snd_pcm_substream *substream, | |
619 | struct snd_soc_dai *dai) | |
620 | { | |
621 | struct i2s_dai *i2s = to_info(dai); | |
622 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
623 | unsigned long flags; | |
624 | ||
625 | spin_lock_irqsave(&lock, flags); | |
626 | ||
627 | i2s->mode |= DAI_OPENED; | |
628 | ||
629 | if (is_manager(other)) | |
630 | i2s->mode &= ~DAI_MANAGER; | |
631 | else | |
632 | i2s->mode |= DAI_MANAGER; | |
633 | ||
634 | /* Enforce set_sysclk in Master mode */ | |
635 | i2s->rclk_srcrate = 0; | |
636 | ||
637 | spin_unlock_irqrestore(&lock, flags); | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static void i2s_shutdown(struct snd_pcm_substream *substream, | |
643 | struct snd_soc_dai *dai) | |
644 | { | |
645 | struct i2s_dai *i2s = to_info(dai); | |
646 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
647 | unsigned long flags; | |
648 | ||
649 | spin_lock_irqsave(&lock, flags); | |
650 | ||
651 | i2s->mode &= ~DAI_OPENED; | |
652 | i2s->mode &= ~DAI_MANAGER; | |
653 | ||
654 | if (is_opened(other)) | |
655 | other->mode |= DAI_MANAGER; | |
656 | ||
657 | /* Reset any constraint on RFS and BFS */ | |
658 | i2s->rfs = 0; | |
659 | i2s->bfs = 0; | |
660 | ||
661 | spin_unlock_irqrestore(&lock, flags); | |
662 | ||
663 | /* Gate CDCLK by default */ | |
664 | if (!is_opened(other)) | |
665 | i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, | |
666 | 0, SND_SOC_CLOCK_IN); | |
667 | } | |
668 | ||
669 | static int config_setup(struct i2s_dai *i2s) | |
670 | { | |
671 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
672 | unsigned rfs, bfs, blc; | |
673 | u32 psr; | |
674 | ||
675 | blc = get_blc(i2s); | |
676 | ||
677 | bfs = i2s->bfs; | |
678 | ||
679 | if (!bfs && other) | |
680 | bfs = other->bfs; | |
681 | ||
682 | /* Select least possible multiple(2) if no constraint set */ | |
683 | if (!bfs) | |
684 | bfs = blc * 2; | |
685 | ||
686 | rfs = i2s->rfs; | |
687 | ||
688 | if (!rfs && other) | |
689 | rfs = other->rfs; | |
690 | ||
691 | if ((rfs == 256 || rfs == 512) && (blc == 24)) { | |
692 | dev_err(&i2s->pdev->dev, | |
693 | "%d-RFS not supported for 24-blc\n", rfs); | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
697 | if (!rfs) { | |
698 | if (bfs == 16 || bfs == 32) | |
699 | rfs = 256; | |
700 | else | |
701 | rfs = 384; | |
702 | } | |
703 | ||
704 | /* If already setup and running */ | |
705 | if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) { | |
706 | dev_err(&i2s->pdev->dev, | |
707 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
708 | return -EAGAIN; | |
709 | } | |
710 | ||
711 | /* Don't bother RFS, BFS & PSR in Slave mode */ | |
712 | if (is_slave(i2s)) | |
713 | return 0; | |
714 | ||
715 | set_bfs(i2s, bfs); | |
716 | set_rfs(i2s, rfs); | |
717 | ||
718 | if (!(i2s->quirks & QUIRK_NO_MUXPSR)) { | |
719 | psr = i2s->rclk_srcrate / i2s->frmclk / rfs; | |
720 | writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR); | |
721 | dev_dbg(&i2s->pdev->dev, | |
722 | "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n", | |
723 | i2s->rclk_srcrate, psr, rfs, bfs); | |
724 | } | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | static int i2s_trigger(struct snd_pcm_substream *substream, | |
730 | int cmd, struct snd_soc_dai *dai) | |
731 | { | |
732 | int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE); | |
733 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
734 | struct i2s_dai *i2s = to_info(rtd->cpu_dai); | |
735 | unsigned long flags; | |
736 | ||
737 | switch (cmd) { | |
738 | case SNDRV_PCM_TRIGGER_START: | |
739 | case SNDRV_PCM_TRIGGER_RESUME: | |
740 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
741 | local_irq_save(flags); | |
742 | ||
1c7ac018 JB |
743 | if (config_setup(i2s)) { |
744 | local_irq_restore(flags); | |
745 | return -EINVAL; | |
746 | } | |
747 | ||
748 | if (capture) | |
749 | i2s_rxctrl(i2s, 1); | |
750 | else | |
751 | i2s_txctrl(i2s, 1); | |
752 | ||
753 | local_irq_restore(flags); | |
754 | break; | |
755 | case SNDRV_PCM_TRIGGER_STOP: | |
756 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
757 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
758 | local_irq_save(flags); | |
759 | ||
760 | if (capture) | |
761 | i2s_rxctrl(i2s, 0); | |
762 | else | |
763 | i2s_txctrl(i2s, 0); | |
764 | ||
775bc971 JB |
765 | if (capture) |
766 | i2s_fifo(i2s, FIC_RXFLUSH); | |
767 | else | |
768 | i2s_fifo(i2s, FIC_TXFLUSH); | |
769 | ||
1c7ac018 JB |
770 | local_irq_restore(flags); |
771 | break; | |
772 | } | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | static int i2s_set_clkdiv(struct snd_soc_dai *dai, | |
778 | int div_id, int div) | |
779 | { | |
780 | struct i2s_dai *i2s = to_info(dai); | |
781 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
782 | ||
783 | switch (div_id) { | |
784 | case SAMSUNG_I2S_DIV_BCLK: | |
785 | if ((any_active(i2s) && div && (get_bfs(i2s) != div)) | |
786 | || (other && other->bfs && (other->bfs != div))) { | |
787 | dev_err(&i2s->pdev->dev, | |
788 | "%s:%d Other DAI busy\n", __func__, __LINE__); | |
789 | return -EAGAIN; | |
790 | } | |
791 | i2s->bfs = div; | |
792 | break; | |
793 | default: | |
794 | dev_err(&i2s->pdev->dev, | |
795 | "Invalid clock divider(%d)\n", div_id); | |
796 | return -EINVAL; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | static snd_pcm_sframes_t | |
803 | i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) | |
804 | { | |
805 | struct i2s_dai *i2s = to_info(dai); | |
806 | u32 reg = readl(i2s->addr + I2SFIC); | |
807 | snd_pcm_sframes_t delay; | |
808 | ||
809 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
810 | delay = FIC_RXCOUNT(reg); | |
811 | else if (is_secondary(i2s)) | |
812 | delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS)); | |
813 | else | |
814 | delay = FIC_TXCOUNT(reg); | |
815 | ||
816 | return delay; | |
817 | } | |
818 | ||
819 | #ifdef CONFIG_PM | |
820 | static int i2s_suspend(struct snd_soc_dai *dai) | |
821 | { | |
822 | struct i2s_dai *i2s = to_info(dai); | |
823 | ||
824 | if (dai->active) { | |
825 | i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); | |
826 | i2s->suspend_i2scon = readl(i2s->addr + I2SCON); | |
827 | i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); | |
828 | } | |
829 | ||
830 | return 0; | |
831 | } | |
832 | ||
833 | static int i2s_resume(struct snd_soc_dai *dai) | |
834 | { | |
835 | struct i2s_dai *i2s = to_info(dai); | |
836 | ||
837 | if (dai->active) { | |
838 | writel(i2s->suspend_i2scon, i2s->addr + I2SCON); | |
839 | writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); | |
840 | writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); | |
841 | } | |
842 | ||
843 | return 0; | |
844 | } | |
845 | #else | |
846 | #define i2s_suspend NULL | |
847 | #define i2s_resume NULL | |
848 | #endif | |
849 | ||
850 | static int samsung_i2s_dai_probe(struct snd_soc_dai *dai) | |
851 | { | |
852 | struct i2s_dai *i2s = to_info(dai); | |
853 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
854 | ||
855 | if (other && other->clk) /* If this is probe on secondary */ | |
856 | goto probe_exit; | |
857 | ||
858 | i2s->addr = ioremap(i2s->base, 0x100); | |
859 | if (i2s->addr == NULL) { | |
860 | dev_err(&i2s->pdev->dev, "cannot ioremap registers\n"); | |
861 | return -ENXIO; | |
862 | } | |
863 | ||
864 | i2s->clk = clk_get(&i2s->pdev->dev, "iis"); | |
865 | if (IS_ERR(i2s->clk)) { | |
866 | dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n"); | |
867 | iounmap(i2s->addr); | |
868 | return -ENOENT; | |
869 | } | |
870 | clk_enable(i2s->clk); | |
871 | ||
872 | if (other) { | |
873 | other->addr = i2s->addr; | |
874 | other->clk = i2s->clk; | |
875 | } | |
876 | ||
877 | if (i2s->quirks & QUIRK_NEED_RSTCLR) | |
878 | writel(CON_RSTCLR, i2s->addr + I2SCON); | |
879 | ||
880 | probe_exit: | |
881 | /* Reset any constraint on RFS and BFS */ | |
882 | i2s->rfs = 0; | |
883 | i2s->bfs = 0; | |
884 | i2s_txctrl(i2s, 0); | |
885 | i2s_rxctrl(i2s, 0); | |
886 | i2s_fifo(i2s, FIC_TXFLUSH); | |
887 | i2s_fifo(other, FIC_TXFLUSH); | |
888 | i2s_fifo(i2s, FIC_RXFLUSH); | |
889 | ||
890 | /* Gate CDCLK by default */ | |
891 | if (!is_opened(other)) | |
892 | i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK, | |
893 | 0, SND_SOC_CLOCK_IN); | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | static int samsung_i2s_dai_remove(struct snd_soc_dai *dai) | |
899 | { | |
900 | struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai); | |
901 | struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai; | |
902 | ||
903 | if (!other || !other->clk) { | |
904 | ||
905 | if (i2s->quirks & QUIRK_NEED_RSTCLR) | |
906 | writel(0, i2s->addr + I2SCON); | |
907 | ||
908 | clk_disable(i2s->clk); | |
909 | clk_put(i2s->clk); | |
910 | ||
911 | iounmap(i2s->addr); | |
912 | } | |
913 | ||
914 | i2s->clk = NULL; | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
919 | static struct snd_soc_dai_ops samsung_i2s_dai_ops = { | |
920 | .trigger = i2s_trigger, | |
921 | .hw_params = i2s_hw_params, | |
922 | .set_fmt = i2s_set_fmt, | |
923 | .set_clkdiv = i2s_set_clkdiv, | |
924 | .set_sysclk = i2s_set_sysclk, | |
925 | .startup = i2s_startup, | |
926 | .shutdown = i2s_shutdown, | |
927 | .delay = i2s_delay, | |
928 | }; | |
929 | ||
930 | #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000 | |
931 | ||
932 | #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \ | |
933 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
934 | SNDRV_PCM_FMTBIT_S24_LE) | |
935 | ||
936 | static __devinit | |
937 | struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec) | |
938 | { | |
939 | struct i2s_dai *i2s; | |
940 | ||
941 | i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL); | |
942 | if (i2s == NULL) | |
943 | return NULL; | |
944 | ||
945 | i2s->pdev = pdev; | |
946 | i2s->pri_dai = NULL; | |
947 | i2s->sec_dai = NULL; | |
948 | i2s->i2s_dai_drv.symmetric_rates = 1; | |
949 | i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe; | |
950 | i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove; | |
951 | i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops; | |
952 | i2s->i2s_dai_drv.suspend = i2s_suspend; | |
953 | i2s->i2s_dai_drv.resume = i2s_resume; | |
954 | i2s->i2s_dai_drv.playback.channels_min = 2; | |
955 | i2s->i2s_dai_drv.playback.channels_max = 2; | |
956 | i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES; | |
957 | i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS; | |
958 | ||
959 | if (!sec) { | |
960 | i2s->i2s_dai_drv.capture.channels_min = 2; | |
961 | i2s->i2s_dai_drv.capture.channels_max = 2; | |
962 | i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES; | |
963 | i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS; | |
964 | } else { /* Create a new platform_device for Secondary */ | |
965 | i2s->pdev = platform_device_register_resndata(NULL, | |
966 | pdev->name, pdev->id + SAMSUNG_I2S_SECOFF, | |
967 | NULL, 0, NULL, 0); | |
968 | if (IS_ERR(i2s->pdev)) { | |
969 | kfree(i2s); | |
970 | return NULL; | |
971 | } | |
972 | } | |
973 | ||
974 | /* Pre-assign snd_soc_dai_set_drvdata */ | |
975 | dev_set_drvdata(&i2s->pdev->dev, i2s); | |
976 | ||
977 | return i2s; | |
978 | } | |
979 | ||
980 | static __devinit int samsung_i2s_probe(struct platform_device *pdev) | |
981 | { | |
982 | u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan; | |
983 | struct i2s_dai *pri_dai, *sec_dai = NULL; | |
984 | struct s3c_audio_pdata *i2s_pdata; | |
985 | struct samsung_i2s *i2s_cfg; | |
986 | struct resource *res; | |
987 | u32 regs_base, quirks; | |
988 | int ret = 0; | |
989 | ||
990 | /* Call during Seconday interface registration */ | |
991 | if (pdev->id >= SAMSUNG_I2S_SECOFF) { | |
992 | sec_dai = dev_get_drvdata(&pdev->dev); | |
993 | snd_soc_register_dai(&sec_dai->pdev->dev, | |
994 | &sec_dai->i2s_dai_drv); | |
995 | return 0; | |
996 | } | |
997 | ||
998 | i2s_pdata = pdev->dev.platform_data; | |
999 | if (i2s_pdata == NULL) { | |
1000 | dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n"); | |
1001 | return -EINVAL; | |
1002 | } | |
1003 | ||
1004 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1005 | if (!res) { | |
1006 | dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); | |
1007 | return -ENXIO; | |
1008 | } | |
1009 | dma_pl_chan = res->start; | |
1010 | ||
1011 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1012 | if (!res) { | |
1013 | dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n"); | |
1014 | return -ENXIO; | |
1015 | } | |
1016 | dma_cp_chan = res->start; | |
1017 | ||
1018 | res = platform_get_resource(pdev, IORESOURCE_DMA, 2); | |
1019 | if (res) | |
1020 | dma_pl_sec_chan = res->start; | |
1021 | else | |
1022 | dma_pl_sec_chan = 0; | |
1023 | ||
1024 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1025 | if (!res) { | |
1026 | dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); | |
1027 | return -ENXIO; | |
1028 | } | |
1029 | ||
1030 | if (!request_mem_region(res->start, resource_size(res), | |
1031 | "samsung-i2s")) { | |
1032 | dev_err(&pdev->dev, "Unable to request SFR region\n"); | |
1033 | return -EBUSY; | |
1034 | } | |
1035 | regs_base = res->start; | |
1036 | ||
1037 | i2s_cfg = &i2s_pdata->type.i2s; | |
1038 | quirks = i2s_cfg->quirks; | |
1039 | ||
1040 | pri_dai = i2s_alloc_dai(pdev, false); | |
1041 | if (!pri_dai) { | |
1042 | dev_err(&pdev->dev, "Unable to alloc I2S_pri\n"); | |
1043 | ret = -ENOMEM; | |
1044 | goto err1; | |
1045 | } | |
1046 | ||
1047 | pri_dai->dma_playback.dma_addr = regs_base + I2STXD; | |
1048 | pri_dai->dma_capture.dma_addr = regs_base + I2SRXD; | |
1049 | pri_dai->dma_playback.client = | |
1050 | (struct s3c2410_dma_client *)&pri_dai->dma_playback; | |
1051 | pri_dai->dma_capture.client = | |
1052 | (struct s3c2410_dma_client *)&pri_dai->dma_capture; | |
1053 | pri_dai->dma_playback.channel = dma_pl_chan; | |
1054 | pri_dai->dma_capture.channel = dma_cp_chan; | |
1055 | pri_dai->src_clk = i2s_cfg->src_clk; | |
1056 | pri_dai->dma_playback.dma_size = 4; | |
1057 | pri_dai->dma_capture.dma_size = 4; | |
1058 | pri_dai->base = regs_base; | |
1059 | pri_dai->quirks = quirks; | |
1060 | ||
1061 | if (quirks & QUIRK_PRI_6CHAN) | |
1062 | pri_dai->i2s_dai_drv.playback.channels_max = 6; | |
1063 | ||
1064 | if (quirks & QUIRK_SEC_DAI) { | |
1065 | sec_dai = i2s_alloc_dai(pdev, true); | |
1066 | if (!sec_dai) { | |
1067 | dev_err(&pdev->dev, "Unable to alloc I2S_sec\n"); | |
1068 | ret = -ENOMEM; | |
1069 | goto err2; | |
1070 | } | |
1071 | sec_dai->dma_playback.dma_addr = regs_base + I2STXDS; | |
1072 | sec_dai->dma_playback.client = | |
1073 | (struct s3c2410_dma_client *)&sec_dai->dma_playback; | |
1074 | /* Use iDMA always if SysDMA not provided */ | |
1075 | sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1; | |
1076 | sec_dai->src_clk = i2s_cfg->src_clk; | |
1077 | sec_dai->dma_playback.dma_size = 4; | |
1078 | sec_dai->base = regs_base; | |
1079 | sec_dai->quirks = quirks; | |
1080 | sec_dai->pri_dai = pri_dai; | |
1081 | pri_dai->sec_dai = sec_dai; | |
1082 | } | |
1083 | ||
1084 | if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { | |
1085 | dev_err(&pdev->dev, "Unable to configure gpio\n"); | |
1086 | ret = -EINVAL; | |
1087 | goto err3; | |
1088 | } | |
1089 | ||
1090 | snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv); | |
1091 | ||
1092 | return 0; | |
1093 | err3: | |
1094 | kfree(sec_dai); | |
1095 | err2: | |
1096 | kfree(pri_dai); | |
1097 | err1: | |
1098 | release_mem_region(regs_base, resource_size(res)); | |
1099 | ||
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | static __devexit int samsung_i2s_remove(struct platform_device *pdev) | |
1104 | { | |
1105 | struct i2s_dai *i2s, *other; | |
1106 | ||
1107 | i2s = dev_get_drvdata(&pdev->dev); | |
1108 | other = i2s->pri_dai ? : i2s->sec_dai; | |
1109 | ||
1110 | if (other) { | |
1111 | other->pri_dai = NULL; | |
1112 | other->sec_dai = NULL; | |
1113 | } else { | |
1114 | struct resource *res; | |
1115 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1116 | if (res) | |
1117 | release_mem_region(res->start, resource_size(res)); | |
1118 | } | |
1119 | ||
1120 | i2s->pri_dai = NULL; | |
1121 | i2s->sec_dai = NULL; | |
1122 | ||
1123 | kfree(i2s); | |
1124 | ||
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, | |
1132 | .remove = samsung_i2s_remove, | |
1133 | .driver = { | |
1134 | .name = "samsung-i2s", | |
1135 | .owner = THIS_MODULE, | |
1136 | }, | |
1137 | }; | |
1138 | ||
1139 | static int __init samsung_i2s_init(void) | |
1140 | { | |
1141 | return platform_driver_register(&samsung_i2s_driver); | |
1142 | } | |
1143 | module_init(samsung_i2s_init); | |
1144 | ||
1145 | static void __exit samsung_i2s_exit(void) | |
1146 | { | |
1147 | platform_driver_unregister(&samsung_i2s_driver); | |
1148 | } | |
1149 | module_exit(samsung_i2s_exit); | |
1150 | ||
1151 | /* Module information */ | |
1152 | MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); | |
1153 | MODULE_DESCRIPTION("Samsung I2S Interface"); | |
1154 | MODULE_ALIAS("platform:samsung-i2s"); | |
1155 | MODULE_LICENSE("GPL"); |