1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ALSA SoC Audio Layer - Samsung I2S Controller driver
4 //
5 // Copyright (c) 2010 Samsung Electronics Co. Ltd.
6 // Jaswinder Singh <jassisinghbrar@gmail.com>
7
8 #include <dt-bindings/sound/samsung-i2s.h>
9 #include <linux/delay.h>
10 #include <linux/slab.h>
11 #include <linux/clk.h>
12 #include <linux/clk-provider.h>
13 #include <linux/io.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/pm_runtime.h>
19
20 #include <sound/soc.h>
21 #include <sound/pcm_params.h>
22
23 #include <linux/platform_data/asoc-s3c.h>
24
25 #include "dma.h"
26 #include "idma.h"
27 #include "i2s.h"
28 #include "i2s-regs.h"
29
30 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
31
32 #define SAMSUNG_I2S_ID_PRIMARY 1
33 #define SAMSUNG_I2S_ID_SECONDARY 2
34
35 struct samsung_i2s_variant_regs {
36 unsigned int bfs_off;
37 unsigned int rfs_off;
38 unsigned int sdf_off;
39 unsigned int txr_off;
40 unsigned int rclksrc_off;
41 unsigned int mss_off;
42 unsigned int cdclkcon_off;
43 unsigned int lrp_off;
44 unsigned int bfs_mask;
45 unsigned int rfs_mask;
46 unsigned int ftx0cnt_off;
47 };
48
49 struct samsung_i2s_dai_data {
50 u32 quirks;
51 unsigned int pcm_rates;
52 const struct samsung_i2s_variant_regs *i2s_variant_regs;
53 };
54
55 struct i2s_dai {
56 /* Platform device for this DAI */
57 struct platform_device *pdev;
58
59 /* Frame clock */
60 unsigned frmclk;
61 /*
62 * Specifically requested RCLK, BCLK by machine driver.
63 * 0 indicates CPU driver is free to choose any value.
64 */
65 unsigned rfs, bfs;
66 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
67 struct i2s_dai *pri_dai;
68 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
69 struct i2s_dai *sec_dai;
70
71 #define DAI_OPENED (1 << 0) /* DAI is opened */
72 #define DAI_MANAGER (1 << 1) /* DAI is the manager */
73 unsigned mode;
74
75 /* Driver for this DAI */
76 struct snd_soc_dai_driver *drv;
77
78 /* DMA parameters */
79 struct snd_dmaengine_dai_dma_data dma_playback;
80 struct snd_dmaengine_dai_dma_data dma_capture;
81 struct snd_dmaengine_dai_dma_data idma_playback;
82 dma_filter_fn filter;
83
84 struct samsung_i2s_priv *priv;
85 };
86
87 struct samsung_i2s_priv {
88 struct platform_device *pdev;
89 struct platform_device *pdev_sec;
90
91 /* Lock for cross interface checks */
92 spinlock_t pcm_lock;
93
94 /* CPU DAIs and their corresponding drivers */
95 struct i2s_dai *dai;
96 struct snd_soc_dai_driver *dai_drv;
97 int num_dais;
98
99 /* The I2S controller's core clock */
100 struct clk *clk;
101
102 /* Clock for generating I2S signals */
103 struct clk *op_clk;
104
105 /* Rate of RCLK source clock */
106 unsigned long rclk_srcrate;
107
108 /* Cache of selected I2S registers for system suspend */
109 u32 suspend_i2smod;
110 u32 suspend_i2scon;
111 u32 suspend_i2spsr;
112
113 const struct samsung_i2s_variant_regs *variant_regs;
114 u32 quirks;
115
116 /* The clock provider's data */
117 struct clk *clk_table[3];
118 struct clk_onecell_data clk_data;
119
120 /* Spinlock protecting member fields below */
121 spinlock_t lock;
122
123 /* Memory mapped SFR region */
124 void __iomem *addr;
125
126 /* A flag indicating the I2S slave mode operation */
127 bool slave_mode;
128 };
129
130 /* Returns true if this is the 'overlay' stereo DAI */
is_secondary(struct i2s_dai * i2s)131 static inline bool is_secondary(struct i2s_dai *i2s)
132 {
133 return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY;
134 }
135
136 /* If this interface of the controller is transmitting data */
tx_active(struct i2s_dai * i2s)137 static inline bool tx_active(struct i2s_dai *i2s)
138 {
139 u32 active;
140
141 if (!i2s)
142 return false;
143
144 active = readl(i2s->priv->addr + I2SCON);
145
146 if (is_secondary(i2s))
147 active &= CON_TXSDMA_ACTIVE;
148 else
149 active &= CON_TXDMA_ACTIVE;
150
151 return active ? true : false;
152 }
153
154 /* Return pointer to the other DAI */
get_other_dai(struct i2s_dai * i2s)155 static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
156 {
157 return i2s->pri_dai ? : i2s->sec_dai;
158 }
159
160 /* If the other interface of the controller is transmitting data */
other_tx_active(struct i2s_dai * i2s)161 static inline bool other_tx_active(struct i2s_dai *i2s)
162 {
163 struct i2s_dai *other = get_other_dai(i2s);
164
165 return tx_active(other);
166 }
167
168 /* If any interface of the controller is transmitting data */
any_tx_active(struct i2s_dai * i2s)169 static inline bool any_tx_active(struct i2s_dai *i2s)
170 {
171 return tx_active(i2s) || other_tx_active(i2s);
172 }
173
174 /* If this interface of the controller is receiving data */
rx_active(struct i2s_dai * i2s)175 static inline bool rx_active(struct i2s_dai *i2s)
176 {
177 u32 active;
178
179 if (!i2s)
180 return false;
181
182 active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE;
183
184 return active ? true : false;
185 }
186
187 /* If the other interface of the controller is receiving data */
other_rx_active(struct i2s_dai * i2s)188 static inline bool other_rx_active(struct i2s_dai *i2s)
189 {
190 struct i2s_dai *other = get_other_dai(i2s);
191
192 return rx_active(other);
193 }
194
195 /* If any interface of the controller is receiving data */
any_rx_active(struct i2s_dai * i2s)196 static inline bool any_rx_active(struct i2s_dai *i2s)
197 {
198 return rx_active(i2s) || other_rx_active(i2s);
199 }
200
201 /* If the other DAI is transmitting or receiving data */
other_active(struct i2s_dai * i2s)202 static inline bool other_active(struct i2s_dai *i2s)
203 {
204 return other_rx_active(i2s) || other_tx_active(i2s);
205 }
206
207 /* If this DAI is transmitting or receiving data */
this_active(struct i2s_dai * i2s)208 static inline bool this_active(struct i2s_dai *i2s)
209 {
210 return tx_active(i2s) || rx_active(i2s);
211 }
212
213 /* If the controller is active anyway */
any_active(struct i2s_dai * i2s)214 static inline bool any_active(struct i2s_dai *i2s)
215 {
216 return this_active(i2s) || other_active(i2s);
217 }
218
to_info(struct snd_soc_dai * dai)219 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
220 {
221 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
222
223 return &priv->dai[dai->id - 1];
224 }
225
is_opened(struct i2s_dai * i2s)226 static inline bool is_opened(struct i2s_dai *i2s)
227 {
228 if (i2s && (i2s->mode & DAI_OPENED))
229 return true;
230 else
231 return false;
232 }
233
is_manager(struct i2s_dai * i2s)234 static inline bool is_manager(struct i2s_dai *i2s)
235 {
236 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
237 return true;
238 else
239 return false;
240 }
241
242 /* Read RCLK of I2S (in multiples of LRCLK) */
get_rfs(struct i2s_dai * i2s)243 static inline unsigned get_rfs(struct i2s_dai *i2s)
244 {
245 struct samsung_i2s_priv *priv = i2s->priv;
246 u32 rfs;
247
248 rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off;
249 rfs &= priv->variant_regs->rfs_mask;
250
251 switch (rfs) {
252 case 7: return 192;
253 case 6: return 96;
254 case 5: return 128;
255 case 4: return 64;
256 case 3: return 768;
257 case 2: return 384;
258 case 1: return 512;
259 default: return 256;
260 }
261 }
262
263 /* Write RCLK of I2S (in multiples of LRCLK) */
set_rfs(struct i2s_dai * i2s,unsigned rfs)264 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
265 {
266 struct samsung_i2s_priv *priv = i2s->priv;
267 u32 mod = readl(priv->addr + I2SMOD);
268 int rfs_shift = priv->variant_regs->rfs_off;
269
270 mod &= ~(priv->variant_regs->rfs_mask << rfs_shift);
271
272 switch (rfs) {
273 case 192:
274 mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
275 break;
276 case 96:
277 mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
278 break;
279 case 128:
280 mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
281 break;
282 case 64:
283 mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
284 break;
285 case 768:
286 mod |= (MOD_RCLK_768FS << rfs_shift);
287 break;
288 case 512:
289 mod |= (MOD_RCLK_512FS << rfs_shift);
290 break;
291 case 384:
292 mod |= (MOD_RCLK_384FS << rfs_shift);
293 break;
294 default:
295 mod |= (MOD_RCLK_256FS << rfs_shift);
296 break;
297 }
298
299 writel(mod, priv->addr + I2SMOD);
300 }
301
302 /* Read bit-clock of I2S (in multiples of LRCLK) */
get_bfs(struct i2s_dai * i2s)303 static inline unsigned get_bfs(struct i2s_dai *i2s)
304 {
305 struct samsung_i2s_priv *priv = i2s->priv;
306 u32 bfs;
307
308 bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off;
309 bfs &= priv->variant_regs->bfs_mask;
310
311 switch (bfs) {
312 case 8: return 256;
313 case 7: return 192;
314 case 6: return 128;
315 case 5: return 96;
316 case 4: return 64;
317 case 3: return 24;
318 case 2: return 16;
319 case 1: return 48;
320 default: return 32;
321 }
322 }
323
324 /* Write bit-clock of I2S (in multiples of LRCLK) */
set_bfs(struct i2s_dai * i2s,unsigned bfs)325 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
326 {
327 struct samsung_i2s_priv *priv = i2s->priv;
328 u32 mod = readl(priv->addr + I2SMOD);
329 int tdm = priv->quirks & QUIRK_SUPPORTS_TDM;
330 int bfs_shift = priv->variant_regs->bfs_off;
331
332 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
333 if (!tdm && bfs > 48) {
334 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
335 return;
336 }
337
338 mod &= ~(priv->variant_regs->bfs_mask << bfs_shift);
339
340 switch (bfs) {
341 case 48:
342 mod |= (MOD_BCLK_48FS << bfs_shift);
343 break;
344 case 32:
345 mod |= (MOD_BCLK_32FS << bfs_shift);
346 break;
347 case 24:
348 mod |= (MOD_BCLK_24FS << bfs_shift);
349 break;
350 case 16:
351 mod |= (MOD_BCLK_16FS << bfs_shift);
352 break;
353 case 64:
354 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
355 break;
356 case 96:
357 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
358 break;
359 case 128:
360 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
361 break;
362 case 192:
363 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
364 break;
365 case 256:
366 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
367 break;
368 default:
369 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
370 return;
371 }
372
373 writel(mod, priv->addr + I2SMOD);
374 }
375
376 /* Sample size */
get_blc(struct i2s_dai * i2s)377 static inline int get_blc(struct i2s_dai *i2s)
378 {
379 int blc = readl(i2s->priv->addr + I2SMOD);
380
381 blc = (blc >> 13) & 0x3;
382
383 switch (blc) {
384 case 2: return 24;
385 case 1: return 8;
386 default: return 16;
387 }
388 }
389
390 /* TX channel control */
i2s_txctrl(struct i2s_dai * i2s,int on)391 static void i2s_txctrl(struct i2s_dai *i2s, int on)
392 {
393 struct samsung_i2s_priv *priv = i2s->priv;
394 void __iomem *addr = priv->addr;
395 int txr_off = priv->variant_regs->txr_off;
396 u32 con = readl(addr + I2SCON);
397 u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
398
399 if (on) {
400 con |= CON_ACTIVE;
401 con &= ~CON_TXCH_PAUSE;
402
403 if (is_secondary(i2s)) {
404 con |= CON_TXSDMA_ACTIVE;
405 con &= ~CON_TXSDMA_PAUSE;
406 } else {
407 con |= CON_TXDMA_ACTIVE;
408 con &= ~CON_TXDMA_PAUSE;
409 }
410
411 if (any_rx_active(i2s))
412 mod |= 2 << txr_off;
413 else
414 mod |= 0 << txr_off;
415 } else {
416 if (is_secondary(i2s)) {
417 con |= CON_TXSDMA_PAUSE;
418 con &= ~CON_TXSDMA_ACTIVE;
419 } else {
420 con |= CON_TXDMA_PAUSE;
421 con &= ~CON_TXDMA_ACTIVE;
422 }
423
424 if (other_tx_active(i2s)) {
425 writel(con, addr + I2SCON);
426 return;
427 }
428
429 con |= CON_TXCH_PAUSE;
430
431 if (any_rx_active(i2s))
432 mod |= 1 << txr_off;
433 else
434 con &= ~CON_ACTIVE;
435 }
436
437 writel(mod, addr + I2SMOD);
438 writel(con, addr + I2SCON);
439 }
440
441 /* RX Channel Control */
i2s_rxctrl(struct i2s_dai * i2s,int on)442 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
443 {
444 struct samsung_i2s_priv *priv = i2s->priv;
445 void __iomem *addr = priv->addr;
446 int txr_off = priv->variant_regs->txr_off;
447 u32 con = readl(addr + I2SCON);
448 u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
449
450 if (on) {
451 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
452 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
453
454 if (any_tx_active(i2s))
455 mod |= 2 << txr_off;
456 else
457 mod |= 1 << txr_off;
458 } else {
459 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
460 con &= ~CON_RXDMA_ACTIVE;
461
462 if (any_tx_active(i2s))
463 mod |= 0 << txr_off;
464 else
465 con &= ~CON_ACTIVE;
466 }
467
468 writel(mod, addr + I2SMOD);
469 writel(con, addr + I2SCON);
470 }
471
472 /* Flush FIFO of an interface */
i2s_fifo(struct i2s_dai * i2s,u32 flush)473 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
474 {
475 void __iomem *fic;
476 u32 val;
477
478 if (!i2s)
479 return;
480
481 if (is_secondary(i2s))
482 fic = i2s->priv->addr + I2SFICS;
483 else
484 fic = i2s->priv->addr + I2SFIC;
485
486 /* Flush the FIFO */
487 writel(readl(fic) | flush, fic);
488
489 /* Be patient */
490 val = msecs_to_loops(1) / 1000; /* 1 usec */
491 while (--val)
492 cpu_relax();
493
494 writel(readl(fic) & ~flush, fic);
495 }
496
i2s_set_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int rfs,int dir)497 static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs,
498 int dir)
499 {
500 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
501 struct i2s_dai *i2s = to_info(dai);
502 struct i2s_dai *other = get_other_dai(i2s);
503 const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs;
504 unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
505 unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
506 u32 mod, mask, val = 0;
507 unsigned long flags;
508 int ret = 0;
509
510 pm_runtime_get_sync(dai->dev);
511
512 spin_lock_irqsave(&priv->lock, flags);
513 mod = readl(priv->addr + I2SMOD);
514 spin_unlock_irqrestore(&priv->lock, flags);
515
516 switch (clk_id) {
517 case SAMSUNG_I2S_OPCLK:
518 mask = MOD_OPCLK_MASK;
519 val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
520 break;
521 case SAMSUNG_I2S_CDCLK:
522 mask = 1 << i2s_regs->cdclkcon_off;
523 /* Shouldn't matter in GATING(CLOCK_IN) mode */
524 if (dir == SND_SOC_CLOCK_IN)
525 rfs = 0;
526
527 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
528 (any_active(i2s) &&
529 (((dir == SND_SOC_CLOCK_IN)
530 && !(mod & cdcon_mask)) ||
531 ((dir == SND_SOC_CLOCK_OUT)
532 && (mod & cdcon_mask))))) {
533 dev_err(&i2s->pdev->dev,
534 "%s:%d Other DAI busy\n", __func__, __LINE__);
535 ret = -EAGAIN;
536 goto err;
537 }
538
539 if (dir == SND_SOC_CLOCK_IN)
540 val = 1 << i2s_regs->cdclkcon_off;
541
542 i2s->rfs = rfs;
543 break;
544
545 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
546 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
547 mask = 1 << i2s_regs->rclksrc_off;
548
549 if ((priv->quirks & QUIRK_NO_MUXPSR)
550 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
551 clk_id = 0;
552 else
553 clk_id = 1;
554
555 if (!any_active(i2s)) {
556 if (priv->op_clk && !IS_ERR(priv->op_clk)) {
557 if ((clk_id && !(mod & rsrc_mask)) ||
558 (!clk_id && (mod & rsrc_mask))) {
559 clk_disable_unprepare(priv->op_clk);
560 clk_put(priv->op_clk);
561 } else {
562 priv->rclk_srcrate =
563 clk_get_rate(priv->op_clk);
564 goto done;
565 }
566 }
567
568 if (clk_id)
569 priv->op_clk = clk_get(&i2s->pdev->dev,
570 "i2s_opclk1");
571 else
572 priv->op_clk = clk_get(&i2s->pdev->dev,
573 "i2s_opclk0");
574
575 if (WARN_ON(IS_ERR(priv->op_clk))) {
576 ret = PTR_ERR(priv->op_clk);
577 priv->op_clk = NULL;
578 goto err;
579 }
580
581 ret = clk_prepare_enable(priv->op_clk);
582 if (ret) {
583 clk_put(priv->op_clk);
584 priv->op_clk = NULL;
585 goto err;
586 }
587 priv->rclk_srcrate = clk_get_rate(priv->op_clk);
588
589 } else if ((!clk_id && (mod & rsrc_mask))
590 || (clk_id && !(mod & rsrc_mask))) {
591 dev_err(&i2s->pdev->dev,
592 "%s:%d Other DAI busy\n", __func__, __LINE__);
593 ret = -EAGAIN;
594 goto err;
595 } else {
596 /* Call can't be on the active DAI */
597 goto done;
598 }
599
600 if (clk_id == 1)
601 val = 1 << i2s_regs->rclksrc_off;
602 break;
603 default:
604 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
605 ret = -EINVAL;
606 goto err;
607 }
608
609 spin_lock_irqsave(&priv->lock, flags);
610 mod = readl(priv->addr + I2SMOD);
611 mod = (mod & ~mask) | val;
612 writel(mod, priv->addr + I2SMOD);
613 spin_unlock_irqrestore(&priv->lock, flags);
614 done:
615 pm_runtime_put(dai->dev);
616
617 return 0;
618 err:
619 pm_runtime_put(dai->dev);
620 return ret;
621 }
622
i2s_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)623 static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
624 {
625 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
626 struct i2s_dai *i2s = to_info(dai);
627 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
628 u32 mod, tmp = 0;
629 unsigned long flags;
630
631 lrp_shift = priv->variant_regs->lrp_off;
632 sdf_shift = priv->variant_regs->sdf_off;
633 mod_slave = 1 << priv->variant_regs->mss_off;
634
635 sdf_mask = MOD_SDF_MASK << sdf_shift;
636 lrp_rlow = MOD_LR_RLOW << lrp_shift;
637
638 /* Format is priority */
639 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
640 case SND_SOC_DAIFMT_RIGHT_J:
641 tmp |= lrp_rlow;
642 tmp |= (MOD_SDF_MSB << sdf_shift);
643 break;
644 case SND_SOC_DAIFMT_LEFT_J:
645 tmp |= lrp_rlow;
646 tmp |= (MOD_SDF_LSB << sdf_shift);
647 break;
648 case SND_SOC_DAIFMT_I2S:
649 tmp |= (MOD_SDF_IIS << sdf_shift);
650 break;
651 default:
652 dev_err(&i2s->pdev->dev, "Format not supported\n");
653 return -EINVAL;
654 }
655
656 /*
657 * INV flag is relative to the FORMAT flag - if set it simply
658 * flips the polarity specified by the Standard
659 */
660 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
661 case SND_SOC_DAIFMT_NB_NF:
662 break;
663 case SND_SOC_DAIFMT_NB_IF:
664 if (tmp & lrp_rlow)
665 tmp &= ~lrp_rlow;
666 else
667 tmp |= lrp_rlow;
668 break;
669 default:
670 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
671 return -EINVAL;
672 }
673
674 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
675 case SND_SOC_DAIFMT_CBM_CFM:
676 tmp |= mod_slave;
677 break;
678 case SND_SOC_DAIFMT_CBS_CFS:
679 /*
680 * Set default source clock in Master mode, only when the
681 * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
682 * clock configuration assigned in DT is not overwritten.
683 */
684 if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
685 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
686 0, SND_SOC_CLOCK_IN);
687 break;
688 default:
689 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
690 return -EINVAL;
691 }
692
693 pm_runtime_get_sync(dai->dev);
694 spin_lock_irqsave(&priv->lock, flags);
695 mod = readl(priv->addr + I2SMOD);
696 /*
697 * Don't change the I2S mode if any controller is active on this
698 * channel.
699 */
700 if (any_active(i2s) &&
701 ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
702 spin_unlock_irqrestore(&priv->lock, flags);
703 pm_runtime_put(dai->dev);
704 dev_err(&i2s->pdev->dev,
705 "%s:%d Other DAI busy\n", __func__, __LINE__);
706 return -EAGAIN;
707 }
708
709 mod &= ~(sdf_mask | lrp_rlow | mod_slave);
710 mod |= tmp;
711 writel(mod, priv->addr + I2SMOD);
712 priv->slave_mode = (mod & mod_slave);
713 spin_unlock_irqrestore(&priv->lock, flags);
714 pm_runtime_put(dai->dev);
715
716 return 0;
717 }
718
i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)719 static int i2s_hw_params(struct snd_pcm_substream *substream,
720 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
721 {
722 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
723 struct i2s_dai *i2s = to_info(dai);
724 u32 mod, mask = 0, val = 0;
725 struct clk *rclksrc;
726 unsigned long flags;
727
728 WARN_ON(!pm_runtime_active(dai->dev));
729
730 if (!is_secondary(i2s))
731 mask |= (MOD_DC2_EN | MOD_DC1_EN);
732
733 switch (params_channels(params)) {
734 case 6:
735 val |= MOD_DC2_EN;
736 fallthrough;
737 case 4:
738 val |= MOD_DC1_EN;
739 break;
740 case 2:
741 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
742 i2s->dma_playback.addr_width = 4;
743 else
744 i2s->dma_capture.addr_width = 4;
745 break;
746 case 1:
747 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
748 i2s->dma_playback.addr_width = 2;
749 else
750 i2s->dma_capture.addr_width = 2;
751
752 break;
753 default:
754 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
755 params_channels(params));
756 return -EINVAL;
757 }
758
759 if (is_secondary(i2s))
760 mask |= MOD_BLCS_MASK;
761 else
762 mask |= MOD_BLCP_MASK;
763
764 if (is_manager(i2s))
765 mask |= MOD_BLC_MASK;
766
767 switch (params_width(params)) {
768 case 8:
769 if (is_secondary(i2s))
770 val |= MOD_BLCS_8BIT;
771 else
772 val |= MOD_BLCP_8BIT;
773 if (is_manager(i2s))
774 val |= MOD_BLC_8BIT;
775 break;
776 case 16:
777 if (is_secondary(i2s))
778 val |= MOD_BLCS_16BIT;
779 else
780 val |= MOD_BLCP_16BIT;
781 if (is_manager(i2s))
782 val |= MOD_BLC_16BIT;
783 break;
784 case 24:
785 if (is_secondary(i2s))
786 val |= MOD_BLCS_24BIT;
787 else
788 val |= MOD_BLCP_24BIT;
789 if (is_manager(i2s))
790 val |= MOD_BLC_24BIT;
791 break;
792 default:
793 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
794 params_format(params));
795 return -EINVAL;
796 }
797
798 spin_lock_irqsave(&priv->lock, flags);
799 mod = readl(priv->addr + I2SMOD);
800 mod = (mod & ~mask) | val;
801 writel(mod, priv->addr + I2SMOD);
802 spin_unlock_irqrestore(&priv->lock, flags);
803
804 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
805
806 i2s->frmclk = params_rate(params);
807
808 rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
809 if (rclksrc && !IS_ERR(rclksrc))
810 priv->rclk_srcrate = clk_get_rate(rclksrc);
811
812 return 0;
813 }
814
815 /* We set constraints on the substream according to the version of I2S */
i2s_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)816 static int i2s_startup(struct snd_pcm_substream *substream,
817 struct snd_soc_dai *dai)
818 {
819 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
820 struct i2s_dai *i2s = to_info(dai);
821 struct i2s_dai *other = get_other_dai(i2s);
822 unsigned long flags;
823
824 pm_runtime_get_sync(dai->dev);
825
826 spin_lock_irqsave(&priv->pcm_lock, flags);
827
828 i2s->mode |= DAI_OPENED;
829
830 if (is_manager(other))
831 i2s->mode &= ~DAI_MANAGER;
832 else
833 i2s->mode |= DAI_MANAGER;
834
835 if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR))
836 writel(CON_RSTCLR, i2s->priv->addr + I2SCON);
837
838 spin_unlock_irqrestore(&priv->pcm_lock, flags);
839
840 return 0;
841 }
842
i2s_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)843 static void i2s_shutdown(struct snd_pcm_substream *substream,
844 struct snd_soc_dai *dai)
845 {
846 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
847 struct i2s_dai *i2s = to_info(dai);
848 struct i2s_dai *other = get_other_dai(i2s);
849 unsigned long flags;
850
851 spin_lock_irqsave(&priv->pcm_lock, flags);
852
853 i2s->mode &= ~DAI_OPENED;
854 i2s->mode &= ~DAI_MANAGER;
855
856 if (is_opened(other))
857 other->mode |= DAI_MANAGER;
858
859 /* Reset any constraint on RFS and BFS */
860 i2s->rfs = 0;
861 i2s->bfs = 0;
862
863 spin_unlock_irqrestore(&priv->pcm_lock, flags);
864
865 pm_runtime_put(dai->dev);
866 }
867
config_setup(struct i2s_dai * i2s)868 static int config_setup(struct i2s_dai *i2s)
869 {
870 struct samsung_i2s_priv *priv = i2s->priv;
871 struct i2s_dai *other = get_other_dai(i2s);
872 unsigned rfs, bfs, blc;
873 u32 psr;
874
875 blc = get_blc(i2s);
876
877 bfs = i2s->bfs;
878
879 if (!bfs && other)
880 bfs = other->bfs;
881
882 /* Select least possible multiple(2) if no constraint set */
883 if (!bfs)
884 bfs = blc * 2;
885
886 rfs = i2s->rfs;
887
888 if (!rfs && other)
889 rfs = other->rfs;
890
891 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
892 dev_err(&i2s->pdev->dev,
893 "%d-RFS not supported for 24-blc\n", rfs);
894 return -EINVAL;
895 }
896
897 if (!rfs) {
898 if (bfs == 16 || bfs == 32)
899 rfs = 256;
900 else
901 rfs = 384;
902 }
903
904 /* If already setup and running */
905 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
906 dev_err(&i2s->pdev->dev,
907 "%s:%d Other DAI busy\n", __func__, __LINE__);
908 return -EAGAIN;
909 }
910
911 set_bfs(i2s, bfs);
912 set_rfs(i2s, rfs);
913
914 /* Don't bother with PSR in Slave mode */
915 if (priv->slave_mode)
916 return 0;
917
918 if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
919 psr = priv->rclk_srcrate / i2s->frmclk / rfs;
920 writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR);
921 dev_dbg(&i2s->pdev->dev,
922 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
923 priv->rclk_srcrate, psr, rfs, bfs);
924 }
925
926 return 0;
927 }
928
i2s_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)929 static int i2s_trigger(struct snd_pcm_substream *substream,
930 int cmd, struct snd_soc_dai *dai)
931 {
932 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
933 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
934 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
935 struct i2s_dai *i2s = to_info(asoc_rtd_to_cpu(rtd, 0));
936 unsigned long flags;
937
938 switch (cmd) {
939 case SNDRV_PCM_TRIGGER_START:
940 case SNDRV_PCM_TRIGGER_RESUME:
941 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
942 pm_runtime_get_sync(dai->dev);
943 spin_lock_irqsave(&priv->lock, flags);
944
945 if (config_setup(i2s)) {
946 spin_unlock_irqrestore(&priv->lock, flags);
947 return -EINVAL;
948 }
949
950 if (capture)
951 i2s_rxctrl(i2s, 1);
952 else
953 i2s_txctrl(i2s, 1);
954
955 spin_unlock_irqrestore(&priv->lock, flags);
956 break;
957 case SNDRV_PCM_TRIGGER_STOP:
958 case SNDRV_PCM_TRIGGER_SUSPEND:
959 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
960 spin_lock_irqsave(&priv->lock, flags);
961
962 if (capture) {
963 i2s_rxctrl(i2s, 0);
964 i2s_fifo(i2s, FIC_RXFLUSH);
965 } else {
966 i2s_txctrl(i2s, 0);
967 i2s_fifo(i2s, FIC_TXFLUSH);
968 }
969
970 spin_unlock_irqrestore(&priv->lock, flags);
971 pm_runtime_put(dai->dev);
972 break;
973 }
974
975 return 0;
976 }
977
i2s_set_clkdiv(struct snd_soc_dai * dai,int div_id,int div)978 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
979 int div_id, int div)
980 {
981 struct i2s_dai *i2s = to_info(dai);
982 struct i2s_dai *other = get_other_dai(i2s);
983
984 switch (div_id) {
985 case SAMSUNG_I2S_DIV_BCLK:
986 pm_runtime_get_sync(dai->dev);
987 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
988 || (other && other->bfs && (other->bfs != div))) {
989 pm_runtime_put(dai->dev);
990 dev_err(&i2s->pdev->dev,
991 "%s:%d Other DAI busy\n", __func__, __LINE__);
992 return -EAGAIN;
993 }
994 i2s->bfs = div;
995 pm_runtime_put(dai->dev);
996 break;
997 default:
998 dev_err(&i2s->pdev->dev,
999 "Invalid clock divider(%d)\n", div_id);
1000 return -EINVAL;
1001 }
1002
1003 return 0;
1004 }
1005
1006 static snd_pcm_sframes_t
i2s_delay(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)1007 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
1008 {
1009 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1010 struct i2s_dai *i2s = to_info(dai);
1011 u32 reg = readl(priv->addr + I2SFIC);
1012 snd_pcm_sframes_t delay;
1013
1014 WARN_ON(!pm_runtime_active(dai->dev));
1015
1016 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1017 delay = FIC_RXCOUNT(reg);
1018 else if (is_secondary(i2s))
1019 delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS));
1020 else
1021 delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f;
1022
1023 return delay;
1024 }
1025
1026 #ifdef CONFIG_PM
i2s_suspend(struct snd_soc_component * component)1027 static int i2s_suspend(struct snd_soc_component *component)
1028 {
1029 return pm_runtime_force_suspend(component->dev);
1030 }
1031
i2s_resume(struct snd_soc_component * component)1032 static int i2s_resume(struct snd_soc_component *component)
1033 {
1034 return pm_runtime_force_resume(component->dev);
1035 }
1036 #else
1037 #define i2s_suspend NULL
1038 #define i2s_resume NULL
1039 #endif
1040
samsung_i2s_dai_probe(struct snd_soc_dai * dai)1041 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1042 {
1043 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1044 struct i2s_dai *i2s = to_info(dai);
1045 struct i2s_dai *other = get_other_dai(i2s);
1046 unsigned long flags;
1047
1048 pm_runtime_get_sync(dai->dev);
1049
1050 if (is_secondary(i2s)) {
1051 /* If this is probe on the secondary DAI */
1052 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL);
1053 } else {
1054 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1055 &i2s->dma_capture);
1056
1057 if (priv->quirks & QUIRK_NEED_RSTCLR)
1058 writel(CON_RSTCLR, priv->addr + I2SCON);
1059
1060 if (priv->quirks & QUIRK_SUPPORTS_IDMA)
1061 idma_reg_addr_init(priv->addr,
1062 other->idma_playback.addr);
1063 }
1064
1065 /* Reset any constraint on RFS and BFS */
1066 i2s->rfs = 0;
1067 i2s->bfs = 0;
1068
1069 spin_lock_irqsave(&priv->lock, flags);
1070 i2s_txctrl(i2s, 0);
1071 i2s_rxctrl(i2s, 0);
1072 i2s_fifo(i2s, FIC_TXFLUSH);
1073 i2s_fifo(other, FIC_TXFLUSH);
1074 i2s_fifo(i2s, FIC_RXFLUSH);
1075 spin_unlock_irqrestore(&priv->lock, flags);
1076
1077 /* Gate CDCLK by default */
1078 if (!is_opened(other))
1079 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1080 0, SND_SOC_CLOCK_IN);
1081 pm_runtime_put(dai->dev);
1082
1083 return 0;
1084 }
1085
samsung_i2s_dai_remove(struct snd_soc_dai * dai)1086 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1087 {
1088 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1089 struct i2s_dai *i2s = to_info(dai);
1090 unsigned long flags;
1091
1092 pm_runtime_get_sync(dai->dev);
1093
1094 if (!is_secondary(i2s)) {
1095 if (priv->quirks & QUIRK_NEED_RSTCLR) {
1096 spin_lock_irqsave(&priv->lock, flags);
1097 writel(0, priv->addr + I2SCON);
1098 spin_unlock_irqrestore(&priv->lock, flags);
1099 }
1100 }
1101
1102 pm_runtime_put(dai->dev);
1103
1104 return 0;
1105 }
1106
1107 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1108 .trigger = i2s_trigger,
1109 .hw_params = i2s_hw_params,
1110 .set_fmt = i2s_set_fmt,
1111 .set_clkdiv = i2s_set_clkdiv,
1112 .set_sysclk = i2s_set_sysclk,
1113 .startup = i2s_startup,
1114 .shutdown = i2s_shutdown,
1115 .delay = i2s_delay,
1116 };
1117
1118 static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = {
1119 /* Backend DAI */
1120 SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0),
1121 SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0),
1122
1123 /* Playback Mixer */
1124 SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
1125 };
1126
1127 static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = {
1128 { "Playback Mixer", NULL, "Primary Playback" },
1129 { "Playback Mixer", NULL, "Secondary Playback" },
1130
1131 { "Mixer DAI TX", NULL, "Playback Mixer" },
1132 { "Primary Capture", NULL, "Mixer DAI RX" },
1133 };
1134
1135 static const struct snd_soc_component_driver samsung_i2s_component = {
1136 .name = "samsung-i2s",
1137
1138 .dapm_widgets = samsung_i2s_widgets,
1139 .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets),
1140
1141 .dapm_routes = samsung_i2s_dapm_routes,
1142 .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes),
1143
1144 .suspend = i2s_suspend,
1145 .resume = i2s_resume,
1146 };
1147
1148 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
1149 SNDRV_PCM_FMTBIT_S24_LE)
1150
i2s_alloc_dais(struct samsung_i2s_priv * priv,const struct samsung_i2s_dai_data * i2s_dai_data,int num_dais)1151 static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1152 const struct samsung_i2s_dai_data *i2s_dai_data,
1153 int num_dais)
1154 {
1155 static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1156 static const char *stream_names[] = { "Primary Playback",
1157 "Secondary Playback" };
1158 struct snd_soc_dai_driver *dai_drv;
1159 int i;
1160
1161 priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1162 sizeof(struct i2s_dai), GFP_KERNEL);
1163 if (!priv->dai)
1164 return -ENOMEM;
1165
1166 priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1167 sizeof(*dai_drv), GFP_KERNEL);
1168 if (!priv->dai_drv)
1169 return -ENOMEM;
1170
1171 for (i = 0; i < num_dais; i++) {
1172 dai_drv = &priv->dai_drv[i];
1173
1174 dai_drv->probe = samsung_i2s_dai_probe;
1175 dai_drv->remove = samsung_i2s_dai_remove;
1176
1177 dai_drv->symmetric_rate = 1;
1178 dai_drv->ops = &samsung_i2s_dai_ops;
1179
1180 dai_drv->playback.channels_min = 1;
1181 dai_drv->playback.channels_max = 2;
1182 dai_drv->playback.rates = i2s_dai_data->pcm_rates;
1183 dai_drv->playback.formats = SAMSUNG_I2S_FMTS;
1184 dai_drv->playback.stream_name = stream_names[i];
1185
1186 dai_drv->id = i + 1;
1187 dai_drv->name = dai_names[i];
1188
1189 priv->dai[i].drv = &priv->dai_drv[i];
1190 priv->dai[i].pdev = priv->pdev;
1191 }
1192
1193 /* Initialize capture only for the primary DAI */
1194 dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1];
1195
1196 dai_drv->capture.channels_min = 1;
1197 dai_drv->capture.channels_max = 2;
1198 dai_drv->capture.rates = i2s_dai_data->pcm_rates;
1199 dai_drv->capture.formats = SAMSUNG_I2S_FMTS;
1200 dai_drv->capture.stream_name = "Primary Capture";
1201
1202 return 0;
1203 }
1204
1205 #ifdef CONFIG_PM
i2s_runtime_suspend(struct device * dev)1206 static int i2s_runtime_suspend(struct device *dev)
1207 {
1208 struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1209
1210 priv->suspend_i2smod = readl(priv->addr + I2SMOD);
1211 priv->suspend_i2scon = readl(priv->addr + I2SCON);
1212 priv->suspend_i2spsr = readl(priv->addr + I2SPSR);
1213
1214 clk_disable_unprepare(priv->op_clk);
1215 clk_disable_unprepare(priv->clk);
1216
1217 return 0;
1218 }
1219
i2s_runtime_resume(struct device * dev)1220 static int i2s_runtime_resume(struct device *dev)
1221 {
1222 struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1223 int ret;
1224
1225 ret = clk_prepare_enable(priv->clk);
1226 if (ret)
1227 return ret;
1228
1229 if (priv->op_clk) {
1230 ret = clk_prepare_enable(priv->op_clk);
1231 if (ret) {
1232 clk_disable_unprepare(priv->clk);
1233 return ret;
1234 }
1235 }
1236
1237 writel(priv->suspend_i2scon, priv->addr + I2SCON);
1238 writel(priv->suspend_i2smod, priv->addr + I2SMOD);
1239 writel(priv->suspend_i2spsr, priv->addr + I2SPSR);
1240
1241 return 0;
1242 }
1243 #endif /* CONFIG_PM */
1244
i2s_unregister_clocks(struct samsung_i2s_priv * priv)1245 static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1246 {
1247 int i;
1248
1249 for (i = 0; i < priv->clk_data.clk_num; i++) {
1250 if (!IS_ERR(priv->clk_table[i]))
1251 clk_unregister(priv->clk_table[i]);
1252 }
1253 }
1254
i2s_unregister_clock_provider(struct samsung_i2s_priv * priv)1255 static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1256 {
1257 of_clk_del_provider(priv->pdev->dev.of_node);
1258 i2s_unregister_clocks(priv);
1259 }
1260
1261
i2s_register_clock_provider(struct samsung_i2s_priv * priv)1262 static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1263 {
1264
1265 const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1266 const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1267 const char *p_names[2] = { NULL };
1268 struct device *dev = &priv->pdev->dev;
1269 const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs;
1270 const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1271 struct clk *rclksrc;
1272 int ret, i;
1273
1274 /* Register the clock provider only if it's expected in the DTB */
1275 if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1276 return 0;
1277
1278 /* Get the RCLKSRC mux clock parent clock names */
1279 for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1280 rclksrc = clk_get(dev, clk_name[i]);
1281 if (IS_ERR(rclksrc))
1282 continue;
1283 p_names[i] = __clk_get_name(rclksrc);
1284 clk_put(rclksrc);
1285 }
1286
1287 for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1288 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1289 dev_name(dev), i2s_clk_desc[i]);
1290 if (!i2s_clk_name[i])
1291 return -ENOMEM;
1292 }
1293
1294 if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
1295 /* Activate the prescaler */
1296 u32 val = readl(priv->addr + I2SPSR);
1297 writel(val | PSR_PSREN, priv->addr + I2SPSR);
1298
1299 priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1300 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1301 ARRAY_SIZE(p_names),
1302 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1303 priv->addr + I2SMOD, reg_info->rclksrc_off,
1304 1, 0, &priv->lock);
1305
1306 priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1307 i2s_clk_name[CLK_I2S_RCLK_PSR],
1308 i2s_clk_name[CLK_I2S_RCLK_SRC],
1309 CLK_SET_RATE_PARENT,
1310 priv->addr + I2SPSR, 8, 6, 0, &priv->lock);
1311
1312 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1313 priv->clk_data.clk_num = 2;
1314 }
1315
1316 priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1317 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1318 CLK_SET_RATE_PARENT,
1319 priv->addr + I2SMOD, reg_info->cdclkcon_off,
1320 CLK_GATE_SET_TO_DISABLE, &priv->lock);
1321
1322 priv->clk_data.clk_num += 1;
1323 priv->clk_data.clks = priv->clk_table;
1324
1325 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1326 &priv->clk_data);
1327 if (ret < 0) {
1328 dev_err(dev, "failed to add clock provider: %d\n", ret);
1329 i2s_unregister_clocks(priv);
1330 }
1331
1332 return ret;
1333 }
1334
1335 /* Create platform device for the secondary PCM */
i2s_create_secondary_device(struct samsung_i2s_priv * priv)1336 static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1337 {
1338 struct platform_device *pdev_sec;
1339 const char *devname;
1340 int ret;
1341
1342 devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec",
1343 dev_name(&priv->pdev->dev));
1344 if (!devname)
1345 return -ENOMEM;
1346
1347 pdev_sec = platform_device_alloc(devname, -1);
1348 if (!pdev_sec)
1349 return -ENOMEM;
1350
1351 pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL);
1352
1353 ret = platform_device_add(pdev_sec);
1354 if (ret < 0) {
1355 platform_device_put(pdev_sec);
1356 return ret;
1357 }
1358
1359 ret = device_attach(&pdev_sec->dev);
1360 if (ret <= 0) {
1361 platform_device_unregister(priv->pdev_sec);
1362 dev_info(&pdev_sec->dev, "device_attach() failed\n");
1363 return ret;
1364 }
1365
1366 priv->pdev_sec = pdev_sec;
1367
1368 return 0;
1369 }
1370
i2s_delete_secondary_device(struct samsung_i2s_priv * priv)1371 static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1372 {
1373 platform_device_unregister(priv->pdev_sec);
1374 priv->pdev_sec = NULL;
1375 }
1376
samsung_i2s_probe(struct platform_device * pdev)1377 static int samsung_i2s_probe(struct platform_device *pdev)
1378 {
1379 struct i2s_dai *pri_dai, *sec_dai = NULL;
1380 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1381 u32 regs_base, idma_addr = 0;
1382 struct device_node *np = pdev->dev.of_node;
1383 const struct samsung_i2s_dai_data *i2s_dai_data;
1384 const struct platform_device_id *id;
1385 struct samsung_i2s_priv *priv;
1386 struct resource *res;
1387 int num_dais, ret;
1388
1389 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
1390 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1391 } else {
1392 id = platform_get_device_id(pdev);
1393
1394 /* Nothing to do if it is the secondary device probe */
1395 if (!id)
1396 return 0;
1397
1398 i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data;
1399 }
1400
1401 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1402 if (!priv)
1403 return -ENOMEM;
1404
1405 if (np) {
1406 priv->quirks = i2s_dai_data->quirks;
1407 } else {
1408 if (!i2s_pdata) {
1409 dev_err(&pdev->dev, "Missing platform data\n");
1410 return -EINVAL;
1411 }
1412 priv->quirks = i2s_pdata->type.quirks;
1413 }
1414
1415 num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1;
1416 priv->pdev = pdev;
1417 priv->variant_regs = i2s_dai_data->i2s_variant_regs;
1418
1419 ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1420 if (ret < 0)
1421 return ret;
1422
1423 pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1424
1425 spin_lock_init(&priv->lock);
1426 spin_lock_init(&priv->pcm_lock);
1427
1428 if (!np) {
1429 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1430 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1431 pri_dai->filter = i2s_pdata->dma_filter;
1432
1433 idma_addr = i2s_pdata->type.idma_addr;
1434 } else {
1435 if (of_property_read_u32(np, "samsung,idma-addr",
1436 &idma_addr)) {
1437 if (priv->quirks & QUIRK_SUPPORTS_IDMA) {
1438 dev_info(&pdev->dev, "idma address is not"\
1439 "specified");
1440 }
1441 }
1442 }
1443
1444 priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1445 if (IS_ERR(priv->addr))
1446 return PTR_ERR(priv->addr);
1447
1448 regs_base = res->start;
1449
1450 priv->clk = devm_clk_get(&pdev->dev, "iis");
1451 if (IS_ERR(priv->clk)) {
1452 dev_err(&pdev->dev, "Failed to get iis clock\n");
1453 return PTR_ERR(priv->clk);
1454 }
1455
1456 ret = clk_prepare_enable(priv->clk);
1457 if (ret != 0) {
1458 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1459 return ret;
1460 }
1461 pri_dai->dma_playback.addr = regs_base + I2STXD;
1462 pri_dai->dma_capture.addr = regs_base + I2SRXD;
1463 pri_dai->dma_playback.chan_name = "tx";
1464 pri_dai->dma_capture.chan_name = "rx";
1465 pri_dai->dma_playback.addr_width = 4;
1466 pri_dai->dma_capture.addr_width = 4;
1467 pri_dai->priv = priv;
1468
1469 if (priv->quirks & QUIRK_PRI_6CHAN)
1470 pri_dai->drv->playback.channels_max = 6;
1471
1472 ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1473 "tx", "rx", NULL);
1474 if (ret < 0)
1475 goto err_disable_clk;
1476
1477 if (priv->quirks & QUIRK_SEC_DAI) {
1478 sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1479
1480 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1481 sec_dai->dma_playback.chan_name = "tx-sec";
1482
1483 if (!np) {
1484 sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1485 sec_dai->filter = i2s_pdata->dma_filter;
1486 }
1487
1488 sec_dai->dma_playback.addr_width = 4;
1489 sec_dai->idma_playback.addr = idma_addr;
1490 sec_dai->pri_dai = pri_dai;
1491 sec_dai->priv = priv;
1492 pri_dai->sec_dai = sec_dai;
1493
1494 ret = i2s_create_secondary_device(priv);
1495 if (ret < 0)
1496 goto err_disable_clk;
1497
1498 ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1499 sec_dai->filter, "tx-sec", NULL,
1500 &pdev->dev);
1501 if (ret < 0)
1502 goto err_del_sec;
1503
1504 }
1505
1506 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1507 dev_err(&pdev->dev, "Unable to configure gpio\n");
1508 ret = -EINVAL;
1509 goto err_del_sec;
1510 }
1511
1512 dev_set_drvdata(&pdev->dev, priv);
1513
1514 ret = devm_snd_soc_register_component(&pdev->dev,
1515 &samsung_i2s_component,
1516 priv->dai_drv, num_dais);
1517 if (ret < 0)
1518 goto err_del_sec;
1519
1520 pm_runtime_set_active(&pdev->dev);
1521 pm_runtime_enable(&pdev->dev);
1522
1523 ret = i2s_register_clock_provider(priv);
1524 if (ret < 0)
1525 goto err_disable_pm;
1526
1527 priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1528
1529 return 0;
1530
1531 err_disable_pm:
1532 pm_runtime_disable(&pdev->dev);
1533 err_del_sec:
1534 i2s_delete_secondary_device(priv);
1535 err_disable_clk:
1536 clk_disable_unprepare(priv->clk);
1537 return ret;
1538 }
1539
samsung_i2s_remove(struct platform_device * pdev)1540 static int samsung_i2s_remove(struct platform_device *pdev)
1541 {
1542 struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1543
1544 /* The secondary device has no driver data assigned */
1545 if (!priv)
1546 return 0;
1547
1548 pm_runtime_get_sync(&pdev->dev);
1549 pm_runtime_disable(&pdev->dev);
1550
1551 i2s_unregister_clock_provider(priv);
1552 i2s_delete_secondary_device(priv);
1553 clk_disable_unprepare(priv->clk);
1554
1555 pm_runtime_put_noidle(&pdev->dev);
1556
1557 return 0;
1558 }
1559
1560 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1561 .bfs_off = 1,
1562 .rfs_off = 3,
1563 .sdf_off = 5,
1564 .txr_off = 8,
1565 .rclksrc_off = 10,
1566 .mss_off = 11,
1567 .cdclkcon_off = 12,
1568 .lrp_off = 7,
1569 .bfs_mask = 0x3,
1570 .rfs_mask = 0x3,
1571 .ftx0cnt_off = 8,
1572 };
1573
1574 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1575 .bfs_off = 0,
1576 .rfs_off = 4,
1577 .sdf_off = 6,
1578 .txr_off = 8,
1579 .rclksrc_off = 10,
1580 .mss_off = 11,
1581 .cdclkcon_off = 12,
1582 .lrp_off = 15,
1583 .bfs_mask = 0xf,
1584 .rfs_mask = 0x3,
1585 .ftx0cnt_off = 8,
1586 };
1587
1588 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1589 .bfs_off = 0,
1590 .rfs_off = 4,
1591 .sdf_off = 7,
1592 .txr_off = 9,
1593 .rclksrc_off = 11,
1594 .mss_off = 12,
1595 .cdclkcon_off = 22,
1596 .lrp_off = 15,
1597 .bfs_mask = 0xf,
1598 .rfs_mask = 0x7,
1599 .ftx0cnt_off = 0,
1600 };
1601
1602 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1603 .bfs_off = 0,
1604 .rfs_off = 3,
1605 .sdf_off = 6,
1606 .txr_off = 8,
1607 .rclksrc_off = 10,
1608 .mss_off = 11,
1609 .cdclkcon_off = 12,
1610 .lrp_off = 15,
1611 .bfs_mask = 0x7,
1612 .rfs_mask = 0x7,
1613 .ftx0cnt_off = 8,
1614 };
1615
1616 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1617 .quirks = QUIRK_NO_MUXPSR,
1618 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1619 .i2s_variant_regs = &i2sv3_regs,
1620 };
1621
1622 static const struct samsung_i2s_dai_data i2sv5_dai_type __maybe_unused = {
1623 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1624 QUIRK_SUPPORTS_IDMA,
1625 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1626 .i2s_variant_regs = &i2sv3_regs,
1627 };
1628
1629 static const struct samsung_i2s_dai_data i2sv6_dai_type __maybe_unused = {
1630 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1631 QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1632 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1633 .i2s_variant_regs = &i2sv6_regs,
1634 };
1635
1636 static const struct samsung_i2s_dai_data i2sv7_dai_type __maybe_unused = {
1637 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1638 QUIRK_SUPPORTS_TDM,
1639 .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1640 .i2s_variant_regs = &i2sv7_regs,
1641 };
1642
1643 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 __maybe_unused = {
1644 .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1645 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1646 .i2s_variant_regs = &i2sv5_i2s1_regs,
1647 };
1648
1649 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1650 {
1651 .name = "samsung-i2s",
1652 .driver_data = (kernel_ulong_t)&i2sv3_dai_type,
1653 },
1654 {},
1655 };
1656 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1657
1658 #ifdef CONFIG_OF
1659 static const struct of_device_id exynos_i2s_match[] = {
1660 {
1661 .compatible = "samsung,s3c6410-i2s",
1662 .data = &i2sv3_dai_type,
1663 }, {
1664 .compatible = "samsung,s5pv210-i2s",
1665 .data = &i2sv5_dai_type,
1666 }, {
1667 .compatible = "samsung,exynos5420-i2s",
1668 .data = &i2sv6_dai_type,
1669 }, {
1670 .compatible = "samsung,exynos7-i2s",
1671 .data = &i2sv7_dai_type,
1672 }, {
1673 .compatible = "samsung,exynos7-i2s1",
1674 .data = &i2sv5_dai_type_i2s1,
1675 },
1676 {},
1677 };
1678 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1679 #endif
1680
1681 static const struct dev_pm_ops samsung_i2s_pm = {
1682 SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1683 i2s_runtime_resume, NULL)
1684 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1685 pm_runtime_force_resume)
1686 };
1687
1688 static struct platform_driver samsung_i2s_driver = {
1689 .probe = samsung_i2s_probe,
1690 .remove = samsung_i2s_remove,
1691 .id_table = samsung_i2s_driver_ids,
1692 .driver = {
1693 .name = "samsung-i2s",
1694 .of_match_table = of_match_ptr(exynos_i2s_match),
1695 .pm = &samsung_i2s_pm,
1696 },
1697 };
1698
1699 module_platform_driver(samsung_i2s_driver);
1700
1701 /* Module information */
1702 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1703 MODULE_DESCRIPTION("Samsung I2S Interface");
1704 MODULE_ALIAS("platform:samsung-i2s");
1705 MODULE_LICENSE("GPL");
1706