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Linux/sound/soc/samsung/i2s.c

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  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         /* Memory mapped SFR region */
 92         void __iomem *addr;
 93 
 94         /* Spinlock protecting access to the device's registers */
 95         spinlock_t lock;
 96 
 97         /* Lock for cross interface checks */
 98         spinlock_t pcm_lock;
 99 
100         /* CPU DAIs and their corresponding drivers */
101         struct i2s_dai *dai;
102         struct snd_soc_dai_driver *dai_drv;
103         int num_dais;
104 
105         /* The I2S controller's core clock */
106         struct clk *clk;
107 
108         /* Clock for generating I2S signals */
109         struct clk *op_clk;
110 
111         /* Rate of RCLK source clock */
112         unsigned long rclk_srcrate;
113 
114         /* Cache of selected I2S registers for system suspend */
115         u32 suspend_i2smod;
116         u32 suspend_i2scon;
117         u32 suspend_i2spsr;
118 
119         const struct samsung_i2s_variant_regs *variant_regs;
120         u32 quirks;
121 
122         /* The clock provider's data */
123         struct clk *clk_table[3];
124         struct clk_onecell_data clk_data;
125 };
126 
127 /* Returns true if this is the 'overlay' stereo DAI */
128 static inline bool is_secondary(struct i2s_dai *i2s)
129 {
130         return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY;
131 }
132 
133 /* If operating in SoC-Slave mode */
134 static inline bool is_slave(struct i2s_dai *i2s)
135 {
136         struct samsung_i2s_priv *priv = i2s->priv;
137 
138         u32 mod = readl(priv->addr + I2SMOD);
139         return (mod & (1 << priv->variant_regs->mss_off)) ? true : false;
140 }
141 
142 /* If this interface of the controller is transmitting data */
143 static inline bool tx_active(struct i2s_dai *i2s)
144 {
145         u32 active;
146 
147         if (!i2s)
148                 return false;
149 
150         active = readl(i2s->priv->addr + I2SCON);
151 
152         if (is_secondary(i2s))
153                 active &= CON_TXSDMA_ACTIVE;
154         else
155                 active &= CON_TXDMA_ACTIVE;
156 
157         return active ? true : false;
158 }
159 
160 /* Return pointer to the other DAI */
161 static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
162 {
163         return i2s->pri_dai ? : i2s->sec_dai;
164 }
165 
166 /* If the other interface of the controller is transmitting data */
167 static inline bool other_tx_active(struct i2s_dai *i2s)
168 {
169         struct i2s_dai *other = get_other_dai(i2s);
170 
171         return tx_active(other);
172 }
173 
174 /* If any interface of the controller is transmitting data */
175 static inline bool any_tx_active(struct i2s_dai *i2s)
176 {
177         return tx_active(i2s) || other_tx_active(i2s);
178 }
179 
180 /* If this interface of the controller is receiving data */
181 static inline bool rx_active(struct i2s_dai *i2s)
182 {
183         u32 active;
184 
185         if (!i2s)
186                 return false;
187 
188         active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE;
189 
190         return active ? true : false;
191 }
192 
193 /* If the other interface of the controller is receiving data */
194 static inline bool other_rx_active(struct i2s_dai *i2s)
195 {
196         struct i2s_dai *other = get_other_dai(i2s);
197 
198         return rx_active(other);
199 }
200 
201 /* If any interface of the controller is receiving data */
202 static inline bool any_rx_active(struct i2s_dai *i2s)
203 {
204         return rx_active(i2s) || other_rx_active(i2s);
205 }
206 
207 /* If the other DAI is transmitting or receiving data */
208 static inline bool other_active(struct i2s_dai *i2s)
209 {
210         return other_rx_active(i2s) || other_tx_active(i2s);
211 }
212 
213 /* If this DAI is transmitting or receiving data */
214 static inline bool this_active(struct i2s_dai *i2s)
215 {
216         return tx_active(i2s) || rx_active(i2s);
217 }
218 
219 /* If the controller is active anyway */
220 static inline bool any_active(struct i2s_dai *i2s)
221 {
222         return this_active(i2s) || other_active(i2s);
223 }
224 
225 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
226 {
227         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
228 
229         return &priv->dai[dai->id - 1];
230 }
231 
232 static inline bool is_opened(struct i2s_dai *i2s)
233 {
234         if (i2s && (i2s->mode & DAI_OPENED))
235                 return true;
236         else
237                 return false;
238 }
239 
240 static inline bool is_manager(struct i2s_dai *i2s)
241 {
242         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
243                 return true;
244         else
245                 return false;
246 }
247 
248 /* Read RCLK of I2S (in multiples of LRCLK) */
249 static inline unsigned get_rfs(struct i2s_dai *i2s)
250 {
251         struct samsung_i2s_priv *priv = i2s->priv;
252         u32 rfs;
253 
254         rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off;
255         rfs &= priv->variant_regs->rfs_mask;
256 
257         switch (rfs) {
258         case 7: return 192;
259         case 6: return 96;
260         case 5: return 128;
261         case 4: return 64;
262         case 3: return 768;
263         case 2: return 384;
264         case 1: return 512;
265         default: return 256;
266         }
267 }
268 
269 /* Write RCLK of I2S (in multiples of LRCLK) */
270 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
271 {
272         struct samsung_i2s_priv *priv = i2s->priv;
273         u32 mod = readl(priv->addr + I2SMOD);
274         int rfs_shift = priv->variant_regs->rfs_off;
275 
276         mod &= ~(priv->variant_regs->rfs_mask << rfs_shift);
277 
278         switch (rfs) {
279         case 192:
280                 mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
281                 break;
282         case 96:
283                 mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
284                 break;
285         case 128:
286                 mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
287                 break;
288         case 64:
289                 mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
290                 break;
291         case 768:
292                 mod |= (MOD_RCLK_768FS << rfs_shift);
293                 break;
294         case 512:
295                 mod |= (MOD_RCLK_512FS << rfs_shift);
296                 break;
297         case 384:
298                 mod |= (MOD_RCLK_384FS << rfs_shift);
299                 break;
300         default:
301                 mod |= (MOD_RCLK_256FS << rfs_shift);
302                 break;
303         }
304 
305         writel(mod, priv->addr + I2SMOD);
306 }
307 
308 /* Read bit-clock of I2S (in multiples of LRCLK) */
309 static inline unsigned get_bfs(struct i2s_dai *i2s)
310 {
311         struct samsung_i2s_priv *priv = i2s->priv;
312         u32 bfs;
313 
314         bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off;
315         bfs &= priv->variant_regs->bfs_mask;
316 
317         switch (bfs) {
318         case 8: return 256;
319         case 7: return 192;
320         case 6: return 128;
321         case 5: return 96;
322         case 4: return 64;
323         case 3: return 24;
324         case 2: return 16;
325         case 1: return 48;
326         default: return 32;
327         }
328 }
329 
330 /* Write bit-clock of I2S (in multiples of LRCLK) */
331 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
332 {
333         struct samsung_i2s_priv *priv = i2s->priv;
334         u32 mod = readl(priv->addr + I2SMOD);
335         int tdm = priv->quirks & QUIRK_SUPPORTS_TDM;
336         int bfs_shift = priv->variant_regs->bfs_off;
337 
338         /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
339         if (!tdm && bfs > 48) {
340                 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
341                 return;
342         }
343 
344         mod &= ~(priv->variant_regs->bfs_mask << bfs_shift);
345 
346         switch (bfs) {
347         case 48:
348                 mod |= (MOD_BCLK_48FS << bfs_shift);
349                 break;
350         case 32:
351                 mod |= (MOD_BCLK_32FS << bfs_shift);
352                 break;
353         case 24:
354                 mod |= (MOD_BCLK_24FS << bfs_shift);
355                 break;
356         case 16:
357                 mod |= (MOD_BCLK_16FS << bfs_shift);
358                 break;
359         case 64:
360                 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
361                 break;
362         case 96:
363                 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
364                 break;
365         case 128:
366                 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
367                 break;
368         case 192:
369                 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
370                 break;
371         case 256:
372                 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
373                 break;
374         default:
375                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
376                 return;
377         }
378 
379         writel(mod, priv->addr + I2SMOD);
380 }
381 
382 /* Sample size */
383 static inline int get_blc(struct i2s_dai *i2s)
384 {
385         int blc = readl(i2s->priv->addr + I2SMOD);
386 
387         blc = (blc >> 13) & 0x3;
388 
389         switch (blc) {
390         case 2: return 24;
391         case 1: return 8;
392         default: return 16;
393         }
394 }
395 
396 /* TX channel control */
397 static void i2s_txctrl(struct i2s_dai *i2s, int on)
398 {
399         struct samsung_i2s_priv *priv = i2s->priv;
400         void __iomem *addr = priv->addr;
401         int txr_off = priv->variant_regs->txr_off;
402         u32 con = readl(addr + I2SCON);
403         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
404 
405         if (on) {
406                 con |= CON_ACTIVE;
407                 con &= ~CON_TXCH_PAUSE;
408 
409                 if (is_secondary(i2s)) {
410                         con |= CON_TXSDMA_ACTIVE;
411                         con &= ~CON_TXSDMA_PAUSE;
412                 } else {
413                         con |= CON_TXDMA_ACTIVE;
414                         con &= ~CON_TXDMA_PAUSE;
415                 }
416 
417                 if (any_rx_active(i2s))
418                         mod |= 2 << txr_off;
419                 else
420                         mod |= 0 << txr_off;
421         } else {
422                 if (is_secondary(i2s)) {
423                         con |=  CON_TXSDMA_PAUSE;
424                         con &= ~CON_TXSDMA_ACTIVE;
425                 } else {
426                         con |=  CON_TXDMA_PAUSE;
427                         con &= ~CON_TXDMA_ACTIVE;
428                 }
429 
430                 if (other_tx_active(i2s)) {
431                         writel(con, addr + I2SCON);
432                         return;
433                 }
434 
435                 con |=  CON_TXCH_PAUSE;
436 
437                 if (any_rx_active(i2s))
438                         mod |= 1 << txr_off;
439                 else
440                         con &= ~CON_ACTIVE;
441         }
442 
443         writel(mod, addr + I2SMOD);
444         writel(con, addr + I2SCON);
445 }
446 
447 /* RX Channel Control */
448 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
449 {
450         struct samsung_i2s_priv *priv = i2s->priv;
451         void __iomem *addr = priv->addr;
452         int txr_off = priv->variant_regs->txr_off;
453         u32 con = readl(addr + I2SCON);
454         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
455 
456         if (on) {
457                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
458                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
459 
460                 if (any_tx_active(i2s))
461                         mod |= 2 << txr_off;
462                 else
463                         mod |= 1 << txr_off;
464         } else {
465                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
466                 con &= ~CON_RXDMA_ACTIVE;
467 
468                 if (any_tx_active(i2s))
469                         mod |= 0 << txr_off;
470                 else
471                         con &= ~CON_ACTIVE;
472         }
473 
474         writel(mod, addr + I2SMOD);
475         writel(con, addr + I2SCON);
476 }
477 
478 /* Flush FIFO of an interface */
479 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
480 {
481         void __iomem *fic;
482         u32 val;
483 
484         if (!i2s)
485                 return;
486 
487         if (is_secondary(i2s))
488                 fic = i2s->priv->addr + I2SFICS;
489         else
490                 fic = i2s->priv->addr + I2SFIC;
491 
492         /* Flush the FIFO */
493         writel(readl(fic) | flush, fic);
494 
495         /* Be patient */
496         val = msecs_to_loops(1) / 1000; /* 1 usec */
497         while (--val)
498                 cpu_relax();
499 
500         writel(readl(fic) & ~flush, fic);
501 }
502 
503 static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs,
504                           int dir)
505 {
506         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
507         struct i2s_dai *i2s = to_info(dai);
508         struct i2s_dai *other = get_other_dai(i2s);
509         const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs;
510         unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
511         unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
512         u32 mod, mask, val = 0;
513         unsigned long flags;
514         int ret = 0;
515 
516         pm_runtime_get_sync(dai->dev);
517 
518         spin_lock_irqsave(&priv->lock, flags);
519         mod = readl(priv->addr + I2SMOD);
520         spin_unlock_irqrestore(&priv->lock, flags);
521 
522         switch (clk_id) {
523         case SAMSUNG_I2S_OPCLK:
524                 mask = MOD_OPCLK_MASK;
525                 val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
526                 break;
527         case SAMSUNG_I2S_CDCLK:
528                 mask = 1 << i2s_regs->cdclkcon_off;
529                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
530                 if (dir == SND_SOC_CLOCK_IN)
531                         rfs = 0;
532 
533                 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
534                                 (any_active(i2s) &&
535                                 (((dir == SND_SOC_CLOCK_IN)
536                                         && !(mod & cdcon_mask)) ||
537                                 ((dir == SND_SOC_CLOCK_OUT)
538                                         && (mod & cdcon_mask))))) {
539                         dev_err(&i2s->pdev->dev,
540                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
541                         ret = -EAGAIN;
542                         goto err;
543                 }
544 
545                 if (dir == SND_SOC_CLOCK_IN)
546                         val = 1 << i2s_regs->cdclkcon_off;
547 
548                 i2s->rfs = rfs;
549                 break;
550 
551         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
552         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
553                 mask = 1 << i2s_regs->rclksrc_off;
554 
555                 if ((priv->quirks & QUIRK_NO_MUXPSR)
556                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
557                         clk_id = 0;
558                 else
559                         clk_id = 1;
560 
561                 if (!any_active(i2s)) {
562                         if (priv->op_clk && !IS_ERR(priv->op_clk)) {
563                                 if ((clk_id && !(mod & rsrc_mask)) ||
564                                         (!clk_id && (mod & rsrc_mask))) {
565                                         clk_disable_unprepare(priv->op_clk);
566                                         clk_put(priv->op_clk);
567                                 } else {
568                                         priv->rclk_srcrate =
569                                                 clk_get_rate(priv->op_clk);
570                                         goto done;
571                                 }
572                         }
573 
574                         if (clk_id)
575                                 priv->op_clk = clk_get(&i2s->pdev->dev,
576                                                 "i2s_opclk1");
577                         else
578                                 priv->op_clk = clk_get(&i2s->pdev->dev,
579                                                 "i2s_opclk0");
580 
581                         if (WARN_ON(IS_ERR(priv->op_clk))) {
582                                 ret = PTR_ERR(priv->op_clk);
583                                 priv->op_clk = NULL;
584                                 goto err;
585                         }
586 
587                         ret = clk_prepare_enable(priv->op_clk);
588                         if (ret) {
589                                 clk_put(priv->op_clk);
590                                 priv->op_clk = NULL;
591                                 goto err;
592                         }
593                         priv->rclk_srcrate = clk_get_rate(priv->op_clk);
594 
595                 } else if ((!clk_id && (mod & rsrc_mask))
596                                 || (clk_id && !(mod & rsrc_mask))) {
597                         dev_err(&i2s->pdev->dev,
598                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
599                         ret = -EAGAIN;
600                         goto err;
601                 } else {
602                         /* Call can't be on the active DAI */
603                         goto done;
604                 }
605 
606                 if (clk_id == 1)
607                         val = 1 << i2s_regs->rclksrc_off;
608                 break;
609         default:
610                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
611                 ret = -EINVAL;
612                 goto err;
613         }
614 
615         spin_lock_irqsave(&priv->lock, flags);
616         mod = readl(priv->addr + I2SMOD);
617         mod = (mod & ~mask) | val;
618         writel(mod, priv->addr + I2SMOD);
619         spin_unlock_irqrestore(&priv->lock, flags);
620 done:
621         pm_runtime_put(dai->dev);
622 
623         return 0;
624 err:
625         pm_runtime_put(dai->dev);
626         return ret;
627 }
628 
629 static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
630 {
631         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
632         struct i2s_dai *i2s = to_info(dai);
633         int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
634         u32 mod, tmp = 0;
635         unsigned long flags;
636 
637         lrp_shift = priv->variant_regs->lrp_off;
638         sdf_shift = priv->variant_regs->sdf_off;
639         mod_slave = 1 << priv->variant_regs->mss_off;
640 
641         sdf_mask = MOD_SDF_MASK << sdf_shift;
642         lrp_rlow = MOD_LR_RLOW << lrp_shift;
643 
644         /* Format is priority */
645         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
646         case SND_SOC_DAIFMT_RIGHT_J:
647                 tmp |= lrp_rlow;
648                 tmp |= (MOD_SDF_MSB << sdf_shift);
649                 break;
650         case SND_SOC_DAIFMT_LEFT_J:
651                 tmp |= lrp_rlow;
652                 tmp |= (MOD_SDF_LSB << sdf_shift);
653                 break;
654         case SND_SOC_DAIFMT_I2S:
655                 tmp |= (MOD_SDF_IIS << sdf_shift);
656                 break;
657         default:
658                 dev_err(&i2s->pdev->dev, "Format not supported\n");
659                 return -EINVAL;
660         }
661 
662         /*
663          * INV flag is relative to the FORMAT flag - if set it simply
664          * flips the polarity specified by the Standard
665          */
666         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
667         case SND_SOC_DAIFMT_NB_NF:
668                 break;
669         case SND_SOC_DAIFMT_NB_IF:
670                 if (tmp & lrp_rlow)
671                         tmp &= ~lrp_rlow;
672                 else
673                         tmp |= lrp_rlow;
674                 break;
675         default:
676                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
677                 return -EINVAL;
678         }
679 
680         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
681         case SND_SOC_DAIFMT_CBM_CFM:
682                 tmp |= mod_slave;
683                 break;
684         case SND_SOC_DAIFMT_CBS_CFS:
685                 /*
686                  * Set default source clock in Master mode, only when the
687                  * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
688                  * clock configuration assigned in DT is not overwritten.
689                  */
690                 if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
691                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
692                                                         0, SND_SOC_CLOCK_IN);
693                 break;
694         default:
695                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
696                 return -EINVAL;
697         }
698 
699         pm_runtime_get_sync(dai->dev);
700         spin_lock_irqsave(&priv->lock, flags);
701         mod = readl(priv->addr + I2SMOD);
702         /*
703          * Don't change the I2S mode if any controller is active on this
704          * channel.
705          */
706         if (any_active(i2s) &&
707                 ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
708                 spin_unlock_irqrestore(&priv->lock, flags);
709                 pm_runtime_put(dai->dev);
710                 dev_err(&i2s->pdev->dev,
711                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
712                 return -EAGAIN;
713         }
714 
715         mod &= ~(sdf_mask | lrp_rlow | mod_slave);
716         mod |= tmp;
717         writel(mod, priv->addr + I2SMOD);
718         spin_unlock_irqrestore(&priv->lock, flags);
719         pm_runtime_put(dai->dev);
720 
721         return 0;
722 }
723 
724 static int i2s_hw_params(struct snd_pcm_substream *substream,
725         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
726 {
727         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
728         struct i2s_dai *i2s = to_info(dai);
729         u32 mod, mask = 0, val = 0;
730         struct clk *rclksrc;
731         unsigned long flags;
732 
733         WARN_ON(!pm_runtime_active(dai->dev));
734 
735         if (!is_secondary(i2s))
736                 mask |= (MOD_DC2_EN | MOD_DC1_EN);
737 
738         switch (params_channels(params)) {
739         case 6:
740                 val |= MOD_DC2_EN;
741                 /* Fall through */
742         case 4:
743                 val |= MOD_DC1_EN;
744                 break;
745         case 2:
746                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
747                         i2s->dma_playback.addr_width = 4;
748                 else
749                         i2s->dma_capture.addr_width = 4;
750                 break;
751         case 1:
752                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
753                         i2s->dma_playback.addr_width = 2;
754                 else
755                         i2s->dma_capture.addr_width = 2;
756 
757                 break;
758         default:
759                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
760                                 params_channels(params));
761                 return -EINVAL;
762         }
763 
764         if (is_secondary(i2s))
765                 mask |= MOD_BLCS_MASK;
766         else
767                 mask |= MOD_BLCP_MASK;
768 
769         if (is_manager(i2s))
770                 mask |= MOD_BLC_MASK;
771 
772         switch (params_width(params)) {
773         case 8:
774                 if (is_secondary(i2s))
775                         val |= MOD_BLCS_8BIT;
776                 else
777                         val |= MOD_BLCP_8BIT;
778                 if (is_manager(i2s))
779                         val |= MOD_BLC_8BIT;
780                 break;
781         case 16:
782                 if (is_secondary(i2s))
783                         val |= MOD_BLCS_16BIT;
784                 else
785                         val |= MOD_BLCP_16BIT;
786                 if (is_manager(i2s))
787                         val |= MOD_BLC_16BIT;
788                 break;
789         case 24:
790                 if (is_secondary(i2s))
791                         val |= MOD_BLCS_24BIT;
792                 else
793                         val |= MOD_BLCP_24BIT;
794                 if (is_manager(i2s))
795                         val |= MOD_BLC_24BIT;
796                 break;
797         default:
798                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
799                                 params_format(params));
800                 return -EINVAL;
801         }
802 
803         spin_lock_irqsave(&priv->lock, flags);
804         mod = readl(priv->addr + I2SMOD);
805         mod = (mod & ~mask) | val;
806         writel(mod, priv->addr + I2SMOD);
807         spin_unlock_irqrestore(&priv->lock, flags);
808 
809         snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
810 
811         i2s->frmclk = params_rate(params);
812 
813         rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
814         if (rclksrc && !IS_ERR(rclksrc))
815                 priv->rclk_srcrate = clk_get_rate(rclksrc);
816 
817         return 0;
818 }
819 
820 /* We set constraints on the substream according to the version of I2S */
821 static int i2s_startup(struct snd_pcm_substream *substream,
822           struct snd_soc_dai *dai)
823 {
824         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
825         struct i2s_dai *i2s = to_info(dai);
826         struct i2s_dai *other = get_other_dai(i2s);
827         unsigned long flags;
828 
829         pm_runtime_get_sync(dai->dev);
830 
831         spin_lock_irqsave(&priv->pcm_lock, flags);
832 
833         i2s->mode |= DAI_OPENED;
834 
835         if (is_manager(other))
836                 i2s->mode &= ~DAI_MANAGER;
837         else
838                 i2s->mode |= DAI_MANAGER;
839 
840         if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR))
841                 writel(CON_RSTCLR, i2s->priv->addr + I2SCON);
842 
843         spin_unlock_irqrestore(&priv->pcm_lock, flags);
844 
845         return 0;
846 }
847 
848 static void i2s_shutdown(struct snd_pcm_substream *substream,
849         struct snd_soc_dai *dai)
850 {
851         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
852         struct i2s_dai *i2s = to_info(dai);
853         struct i2s_dai *other = get_other_dai(i2s);
854         unsigned long flags;
855 
856         spin_lock_irqsave(&priv->pcm_lock, flags);
857 
858         i2s->mode &= ~DAI_OPENED;
859         i2s->mode &= ~DAI_MANAGER;
860 
861         if (is_opened(other))
862                 other->mode |= DAI_MANAGER;
863 
864         /* Reset any constraint on RFS and BFS */
865         i2s->rfs = 0;
866         i2s->bfs = 0;
867 
868         spin_unlock_irqrestore(&priv->pcm_lock, flags);
869 
870         pm_runtime_put(dai->dev);
871 }
872 
873 static int config_setup(struct i2s_dai *i2s)
874 {
875         struct samsung_i2s_priv *priv = i2s->priv;
876         struct i2s_dai *other = get_other_dai(i2s);
877         unsigned rfs, bfs, blc;
878         u32 psr;
879 
880         blc = get_blc(i2s);
881 
882         bfs = i2s->bfs;
883 
884         if (!bfs && other)
885                 bfs = other->bfs;
886 
887         /* Select least possible multiple(2) if no constraint set */
888         if (!bfs)
889                 bfs = blc * 2;
890 
891         rfs = i2s->rfs;
892 
893         if (!rfs && other)
894                 rfs = other->rfs;
895 
896         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
897                 dev_err(&i2s->pdev->dev,
898                         "%d-RFS not supported for 24-blc\n", rfs);
899                 return -EINVAL;
900         }
901 
902         if (!rfs) {
903                 if (bfs == 16 || bfs == 32)
904                         rfs = 256;
905                 else
906                         rfs = 384;
907         }
908 
909         /* If already setup and running */
910         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
911                 dev_err(&i2s->pdev->dev,
912                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
913                 return -EAGAIN;
914         }
915 
916         set_bfs(i2s, bfs);
917         set_rfs(i2s, rfs);
918 
919         /* Don't bother with PSR in Slave mode */
920         if (is_slave(i2s))
921                 return 0;
922 
923         if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
924                 psr = priv->rclk_srcrate / i2s->frmclk / rfs;
925                 writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR);
926                 dev_dbg(&i2s->pdev->dev,
927                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
928                                 priv->rclk_srcrate, psr, rfs, bfs);
929         }
930 
931         return 0;
932 }
933 
934 static int i2s_trigger(struct snd_pcm_substream *substream,
935         int cmd, struct snd_soc_dai *dai)
936 {
937         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
938         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
939         struct snd_soc_pcm_runtime *rtd = substream->private_data;
940         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
941         unsigned long flags;
942 
943         switch (cmd) {
944         case SNDRV_PCM_TRIGGER_START:
945         case SNDRV_PCM_TRIGGER_RESUME:
946         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
947                 pm_runtime_get_sync(dai->dev);
948                 spin_lock_irqsave(&priv->lock, flags);
949 
950                 if (config_setup(i2s)) {
951                         spin_unlock_irqrestore(&priv->lock, flags);
952                         return -EINVAL;
953                 }
954 
955                 if (capture)
956                         i2s_rxctrl(i2s, 1);
957                 else
958                         i2s_txctrl(i2s, 1);
959 
960                 spin_unlock_irqrestore(&priv->lock, flags);
961                 break;
962         case SNDRV_PCM_TRIGGER_STOP:
963         case SNDRV_PCM_TRIGGER_SUSPEND:
964         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
965                 spin_lock_irqsave(&priv->lock, flags);
966 
967                 if (capture) {
968                         i2s_rxctrl(i2s, 0);
969                         i2s_fifo(i2s, FIC_RXFLUSH);
970                 } else {
971                         i2s_txctrl(i2s, 0);
972                         i2s_fifo(i2s, FIC_TXFLUSH);
973                 }
974 
975                 spin_unlock_irqrestore(&priv->lock, flags);
976                 pm_runtime_put(dai->dev);
977                 break;
978         }
979 
980         return 0;
981 }
982 
983 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
984         int div_id, int div)
985 {
986         struct i2s_dai *i2s = to_info(dai);
987         struct i2s_dai *other = get_other_dai(i2s);
988 
989         switch (div_id) {
990         case SAMSUNG_I2S_DIV_BCLK:
991                 pm_runtime_get_sync(dai->dev);
992                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
993                         || (other && other->bfs && (other->bfs != div))) {
994                         pm_runtime_put(dai->dev);
995                         dev_err(&i2s->pdev->dev,
996                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
997                         return -EAGAIN;
998                 }
999                 i2s->bfs = div;
1000                 pm_runtime_put(dai->dev);
1001                 break;
1002         default:
1003                 dev_err(&i2s->pdev->dev,
1004                         "Invalid clock divider(%d)\n", div_id);
1005                 return -EINVAL;
1006         }
1007 
1008         return 0;
1009 }
1010 
1011 static snd_pcm_sframes_t
1012 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
1013 {
1014         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1015         struct i2s_dai *i2s = to_info(dai);
1016         u32 reg = readl(priv->addr + I2SFIC);
1017         snd_pcm_sframes_t delay;
1018 
1019         WARN_ON(!pm_runtime_active(dai->dev));
1020 
1021         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1022                 delay = FIC_RXCOUNT(reg);
1023         else if (is_secondary(i2s))
1024                 delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS));
1025         else
1026                 delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f;
1027 
1028         return delay;
1029 }
1030 
1031 #ifdef CONFIG_PM
1032 static int i2s_suspend(struct snd_soc_dai *dai)
1033 {
1034         return pm_runtime_force_suspend(dai->dev);
1035 }
1036 
1037 static int i2s_resume(struct snd_soc_dai *dai)
1038 {
1039         return pm_runtime_force_resume(dai->dev);
1040 }
1041 #else
1042 #define i2s_suspend NULL
1043 #define i2s_resume  NULL
1044 #endif
1045 
1046 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1047 {
1048         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1049         struct i2s_dai *i2s = to_info(dai);
1050         struct i2s_dai *other = get_other_dai(i2s);
1051         unsigned long flags;
1052 
1053         pm_runtime_get_sync(dai->dev);
1054 
1055         if (is_secondary(i2s)) {
1056                 /* If this is probe on the secondary DAI */
1057                 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL);
1058         } else {
1059                 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1060                                           &i2s->dma_capture);
1061 
1062                 if (priv->quirks & QUIRK_NEED_RSTCLR)
1063                         writel(CON_RSTCLR, priv->addr + I2SCON);
1064 
1065                 if (priv->quirks & QUIRK_SUPPORTS_IDMA)
1066                         idma_reg_addr_init(priv->addr,
1067                                            other->idma_playback.addr);
1068         }
1069 
1070         /* Reset any constraint on RFS and BFS */
1071         i2s->rfs = 0;
1072         i2s->bfs = 0;
1073 
1074         spin_lock_irqsave(&priv->lock, flags);
1075         i2s_txctrl(i2s, 0);
1076         i2s_rxctrl(i2s, 0);
1077         i2s_fifo(i2s, FIC_TXFLUSH);
1078         i2s_fifo(other, FIC_TXFLUSH);
1079         i2s_fifo(i2s, FIC_RXFLUSH);
1080         spin_unlock_irqrestore(&priv->lock, flags);
1081 
1082         /* Gate CDCLK by default */
1083         if (!is_opened(other))
1084                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1085                                 0, SND_SOC_CLOCK_IN);
1086         pm_runtime_put(dai->dev);
1087 
1088         return 0;
1089 }
1090 
1091 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1092 {
1093         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1094         struct i2s_dai *i2s = to_info(dai);
1095         unsigned long flags;
1096 
1097         pm_runtime_get_sync(dai->dev);
1098 
1099         if (!is_secondary(i2s)) {
1100                 if (priv->quirks & QUIRK_NEED_RSTCLR) {
1101                         spin_lock_irqsave(&priv->lock, flags);
1102                         writel(0, priv->addr + I2SCON);
1103                         spin_unlock_irqrestore(&priv->lock, flags);
1104                 }
1105         }
1106 
1107         pm_runtime_put(dai->dev);
1108 
1109         return 0;
1110 }
1111 
1112 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1113         .trigger = i2s_trigger,
1114         .hw_params = i2s_hw_params,
1115         .set_fmt = i2s_set_fmt,
1116         .set_clkdiv = i2s_set_clkdiv,
1117         .set_sysclk = i2s_set_sysclk,
1118         .startup = i2s_startup,
1119         .shutdown = i2s_shutdown,
1120         .delay = i2s_delay,
1121 };
1122 
1123 static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = {
1124         /* Backend DAI  */
1125         SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0),
1126         SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0),
1127 
1128         /* Playback Mixer */
1129         SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
1130 };
1131 
1132 static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = {
1133         { "Playback Mixer", NULL, "Primary Playback" },
1134         { "Playback Mixer", NULL, "Secondary Playback" },
1135 
1136         { "Mixer DAI TX", NULL, "Playback Mixer" },
1137         { "Primary Capture", NULL, "Mixer DAI RX" },
1138 };
1139 
1140 static const struct snd_soc_component_driver samsung_i2s_component = {
1141         .name = "samsung-i2s",
1142 
1143         .dapm_widgets = samsung_i2s_widgets,
1144         .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets),
1145 
1146         .dapm_routes = samsung_i2s_dapm_routes,
1147         .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes),
1148 };
1149 
1150 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
1151                           SNDRV_PCM_FMTBIT_S24_LE)
1152 
1153 static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1154                           const struct samsung_i2s_dai_data *i2s_dai_data,
1155                           int num_dais)
1156 {
1157         static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1158         static const char *stream_names[] = { "Primary Playback",
1159                                               "Secondary Playback" };
1160         struct snd_soc_dai_driver *dai_drv;
1161         struct i2s_dai *dai;
1162         int i;
1163 
1164         priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1165                                      sizeof(*dai), GFP_KERNEL);
1166         if (!priv->dai)
1167                 return -ENOMEM;
1168 
1169         priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1170                                      sizeof(*dai_drv), GFP_KERNEL);
1171         if (!priv->dai_drv)
1172                 return -ENOMEM;
1173 
1174         for (i = 0; i < num_dais; i++) {
1175                 dai_drv = &priv->dai_drv[i];
1176 
1177                 dai_drv->probe = samsung_i2s_dai_probe;
1178                 dai_drv->remove = samsung_i2s_dai_remove;
1179                 dai_drv->suspend = i2s_suspend;
1180                 dai_drv->resume = i2s_resume;
1181 
1182                 dai_drv->symmetric_rates = 1;
1183                 dai_drv->ops = &samsung_i2s_dai_ops;
1184 
1185                 dai_drv->playback.channels_min = 1;
1186                 dai_drv->playback.channels_max = 2;
1187                 dai_drv->playback.rates = i2s_dai_data->pcm_rates;
1188                 dai_drv->playback.formats = SAMSUNG_I2S_FMTS;
1189                 dai_drv->playback.stream_name = stream_names[i];
1190 
1191                 dai_drv->id = i + 1;
1192                 dai_drv->name = dai_names[i];
1193 
1194                 priv->dai[i].drv = &priv->dai_drv[i];
1195                 priv->dai[i].pdev = priv->pdev;
1196         }
1197 
1198         /* Initialize capture only for the primary DAI */
1199         dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1];
1200 
1201         dai_drv->capture.channels_min = 1;
1202         dai_drv->capture.channels_max = 2;
1203         dai_drv->capture.rates = i2s_dai_data->pcm_rates;
1204         dai_drv->capture.formats = SAMSUNG_I2S_FMTS;
1205         dai_drv->capture.stream_name = "Primary Capture";
1206 
1207         return 0;
1208 }
1209 
1210 #ifdef CONFIG_PM
1211 static int i2s_runtime_suspend(struct device *dev)
1212 {
1213         struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1214 
1215         priv->suspend_i2smod = readl(priv->addr + I2SMOD);
1216         priv->suspend_i2scon = readl(priv->addr + I2SCON);
1217         priv->suspend_i2spsr = readl(priv->addr + I2SPSR);
1218 
1219         if (priv->op_clk)
1220                 clk_disable_unprepare(priv->op_clk);
1221         clk_disable_unprepare(priv->clk);
1222 
1223         return 0;
1224 }
1225 
1226 static int i2s_runtime_resume(struct device *dev)
1227 {
1228         struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1229         int ret;
1230 
1231         ret = clk_prepare_enable(priv->clk);
1232         if (ret)
1233                 return ret;
1234 
1235         if (priv->op_clk) {
1236                 ret = clk_prepare_enable(priv->op_clk);
1237                 if (ret) {
1238                         clk_disable_unprepare(priv->clk);
1239                         return ret;
1240                 }
1241         }
1242 
1243         writel(priv->suspend_i2scon, priv->addr + I2SCON);
1244         writel(priv->suspend_i2smod, priv->addr + I2SMOD);
1245         writel(priv->suspend_i2spsr, priv->addr + I2SPSR);
1246 
1247         return 0;
1248 }
1249 #endif /* CONFIG_PM */
1250 
1251 static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1252 {
1253         int i;
1254 
1255         for (i = 0; i < priv->clk_data.clk_num; i++) {
1256                 if (!IS_ERR(priv->clk_table[i]))
1257                         clk_unregister(priv->clk_table[i]);
1258         }
1259 }
1260 
1261 static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1262 {
1263         of_clk_del_provider(priv->pdev->dev.of_node);
1264         i2s_unregister_clocks(priv);
1265 }
1266 
1267 
1268 static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1269 {
1270 
1271         const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1272         const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1273         const char *p_names[2] = { NULL };
1274         struct device *dev = &priv->pdev->dev;
1275         const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs;
1276         const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1277         struct clk *rclksrc;
1278         int ret, i;
1279 
1280         /* Register the clock provider only if it's expected in the DTB */
1281         if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1282                 return 0;
1283 
1284         /* Get the RCLKSRC mux clock parent clock names */
1285         for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1286                 rclksrc = clk_get(dev, clk_name[i]);
1287                 if (IS_ERR(rclksrc))
1288                         continue;
1289                 p_names[i] = __clk_get_name(rclksrc);
1290                 clk_put(rclksrc);
1291         }
1292 
1293         for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1294                 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1295                                                 dev_name(dev), i2s_clk_desc[i]);
1296                 if (!i2s_clk_name[i])
1297                         return -ENOMEM;
1298         }
1299 
1300         if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
1301                 /* Activate the prescaler */
1302                 u32 val = readl(priv->addr + I2SPSR);
1303                 writel(val | PSR_PSREN, priv->addr + I2SPSR);
1304 
1305                 priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1306                                 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1307                                 ARRAY_SIZE(p_names),
1308                                 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1309                                 priv->addr + I2SMOD, reg_info->rclksrc_off,
1310                                 1, 0, &priv->lock);
1311 
1312                 priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1313                                 i2s_clk_name[CLK_I2S_RCLK_PSR],
1314                                 i2s_clk_name[CLK_I2S_RCLK_SRC],
1315                                 CLK_SET_RATE_PARENT,
1316                                 priv->addr + I2SPSR, 8, 6, 0, &priv->lock);
1317 
1318                 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1319                 priv->clk_data.clk_num = 2;
1320         }
1321 
1322         priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1323                                 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1324                                 CLK_SET_RATE_PARENT,
1325                                 priv->addr + I2SMOD, reg_info->cdclkcon_off,
1326                                 CLK_GATE_SET_TO_DISABLE, &priv->lock);
1327 
1328         priv->clk_data.clk_num += 1;
1329         priv->clk_data.clks = priv->clk_table;
1330 
1331         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1332                                   &priv->clk_data);
1333         if (ret < 0) {
1334                 dev_err(dev, "failed to add clock provider: %d\n", ret);
1335                 i2s_unregister_clocks(priv);
1336         }
1337 
1338         return ret;
1339 }
1340 
1341 /* Create platform device for the secondary PCM */
1342 static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1343 {
1344         struct platform_device *pdev_sec;
1345         const char *devname;
1346         int ret;
1347 
1348         devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec",
1349                                  dev_name(&priv->pdev->dev));
1350         if (!devname)
1351                 return -ENOMEM;
1352 
1353         pdev_sec = platform_device_alloc(devname, -1);
1354         if (!pdev_sec)
1355                 return -ENOMEM;
1356 
1357         pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL);
1358 
1359         ret = platform_device_add(pdev_sec);
1360         if (ret < 0) {
1361                 platform_device_put(pdev_sec);
1362                 return ret;
1363         }
1364 
1365         ret = device_attach(&pdev_sec->dev);
1366         if (ret <= 0) {
1367                 platform_device_unregister(priv->pdev_sec);
1368                 dev_info(&pdev_sec->dev, "device_attach() failed\n");
1369                 return ret;
1370         }
1371 
1372         priv->pdev_sec = pdev_sec;
1373 
1374         return 0;
1375 }
1376 
1377 static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1378 {
1379         platform_device_unregister(priv->pdev_sec);
1380         priv->pdev_sec = NULL;
1381 }
1382 
1383 static int samsung_i2s_probe(struct platform_device *pdev)
1384 {
1385         struct i2s_dai *pri_dai, *sec_dai = NULL;
1386         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1387         u32 regs_base, idma_addr = 0;
1388         struct device_node *np = pdev->dev.of_node;
1389         const struct samsung_i2s_dai_data *i2s_dai_data;
1390         const struct platform_device_id *id;
1391         struct samsung_i2s_priv *priv;
1392         struct resource *res;
1393         int num_dais, ret;
1394 
1395         if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
1396                 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1397         } else {
1398                 id = platform_get_device_id(pdev);
1399 
1400                 /* Nothing to do if it is the secondary device probe */
1401                 if (!id)
1402                         return 0;
1403 
1404                 i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data;
1405         }
1406 
1407         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1408         if (!priv)
1409                 return -ENOMEM;
1410 
1411         if (np) {
1412                 priv->quirks = i2s_dai_data->quirks;
1413         } else {
1414                 if (!i2s_pdata) {
1415                         dev_err(&pdev->dev, "Missing platform data\n");
1416                         return -EINVAL;
1417                 }
1418                 priv->quirks = i2s_pdata->type.quirks;
1419         }
1420 
1421         num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1;
1422         priv->pdev = pdev;
1423         priv->variant_regs = i2s_dai_data->i2s_variant_regs;
1424 
1425         ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1426         if (ret < 0)
1427                 return ret;
1428 
1429         pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1430 
1431         spin_lock_init(&priv->lock);
1432         spin_lock_init(&priv->pcm_lock);
1433 
1434         if (!np) {
1435                 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1436                 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1437                 pri_dai->filter = i2s_pdata->dma_filter;
1438 
1439                 idma_addr = i2s_pdata->type.idma_addr;
1440         } else {
1441                 if (of_property_read_u32(np, "samsung,idma-addr",
1442                                          &idma_addr)) {
1443                         if (priv->quirks & QUIRK_SUPPORTS_IDMA) {
1444                                 dev_info(&pdev->dev, "idma address is not"\
1445                                                 "specified");
1446                         }
1447                 }
1448         }
1449 
1450         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1451         priv->addr = devm_ioremap_resource(&pdev->dev, res);
1452         if (IS_ERR(priv->addr))
1453                 return PTR_ERR(priv->addr);
1454 
1455         regs_base = res->start;
1456 
1457         priv->clk = devm_clk_get(&pdev->dev, "iis");
1458         if (IS_ERR(priv->clk)) {
1459                 dev_err(&pdev->dev, "Failed to get iis clock\n");
1460                 return PTR_ERR(priv->clk);
1461         }
1462 
1463         ret = clk_prepare_enable(priv->clk);
1464         if (ret != 0) {
1465                 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1466                 return ret;
1467         }
1468         pri_dai->dma_playback.addr = regs_base + I2STXD;
1469         pri_dai->dma_capture.addr = regs_base + I2SRXD;
1470         pri_dai->dma_playback.chan_name = "tx";
1471         pri_dai->dma_capture.chan_name = "rx";
1472         pri_dai->dma_playback.addr_width = 4;
1473         pri_dai->dma_capture.addr_width = 4;
1474         pri_dai->priv = priv;
1475 
1476         if (priv->quirks & QUIRK_PRI_6CHAN)
1477                 pri_dai->drv->playback.channels_max = 6;
1478 
1479         ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1480                                                  "tx", "rx", NULL);
1481         if (ret < 0)
1482                 goto err_disable_clk;
1483 
1484         if (priv->quirks & QUIRK_SEC_DAI) {
1485                 sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1486 
1487                 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1488                 sec_dai->dma_playback.chan_name = "tx-sec";
1489 
1490                 if (!np) {
1491                         sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1492                         sec_dai->filter = i2s_pdata->dma_filter;
1493                 }
1494 
1495                 sec_dai->dma_playback.addr_width = 4;
1496                 sec_dai->idma_playback.addr = idma_addr;
1497                 sec_dai->pri_dai = pri_dai;
1498                 sec_dai->priv = priv;
1499                 pri_dai->sec_dai = sec_dai;
1500 
1501                 ret = i2s_create_secondary_device(priv);
1502                 if (ret < 0)
1503                         goto err_disable_clk;
1504 
1505                 ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1506                                                 sec_dai->filter, "tx-sec", NULL,
1507                                                 &pdev->dev);
1508                 if (ret < 0)
1509                         goto err_del_sec;
1510 
1511         }
1512 
1513         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1514                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1515                 ret = -EINVAL;
1516                 goto err_del_sec;
1517         }
1518 
1519         dev_set_drvdata(&pdev->dev, priv);
1520 
1521         ret = devm_snd_soc_register_component(&pdev->dev,
1522                                         &samsung_i2s_component,
1523                                         priv->dai_drv, num_dais);
1524         if (ret < 0)
1525                 goto err_del_sec;
1526 
1527         pm_runtime_set_active(&pdev->dev);
1528         pm_runtime_enable(&pdev->dev);
1529 
1530         ret = i2s_register_clock_provider(priv);
1531         if (ret < 0)
1532                 goto err_disable_pm;
1533 
1534         priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1535 
1536         return 0;
1537 
1538 err_disable_pm:
1539         pm_runtime_disable(&pdev->dev);
1540 err_del_sec:
1541         i2s_delete_secondary_device(priv);
1542 err_disable_clk:
1543         clk_disable_unprepare(priv->clk);
1544         return ret;
1545 }
1546 
1547 static int samsung_i2s_remove(struct platform_device *pdev)
1548 {
1549         struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1550 
1551         /* The secondary device has no driver data assigned */
1552         if (!priv)
1553                 return 0;
1554 
1555         pm_runtime_get_sync(&pdev->dev);
1556         pm_runtime_disable(&pdev->dev);
1557 
1558         i2s_unregister_clock_provider(priv);
1559         i2s_delete_secondary_device(priv);
1560         clk_disable_unprepare(priv->clk);
1561 
1562         pm_runtime_put_noidle(&pdev->dev);
1563 
1564         return 0;
1565 }
1566 
1567 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1568         .bfs_off = 1,
1569         .rfs_off = 3,
1570         .sdf_off = 5,
1571         .txr_off = 8,
1572         .rclksrc_off = 10,
1573         .mss_off = 11,
1574         .cdclkcon_off = 12,
1575         .lrp_off = 7,
1576         .bfs_mask = 0x3,
1577         .rfs_mask = 0x3,
1578         .ftx0cnt_off = 8,
1579 };
1580 
1581 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1582         .bfs_off = 0,
1583         .rfs_off = 4,
1584         .sdf_off = 6,
1585         .txr_off = 8,
1586         .rclksrc_off = 10,
1587         .mss_off = 11,
1588         .cdclkcon_off = 12,
1589         .lrp_off = 15,
1590         .bfs_mask = 0xf,
1591         .rfs_mask = 0x3,
1592         .ftx0cnt_off = 8,
1593 };
1594 
1595 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1596         .bfs_off = 0,
1597         .rfs_off = 4,
1598         .sdf_off = 7,
1599         .txr_off = 9,
1600         .rclksrc_off = 11,
1601         .mss_off = 12,
1602         .cdclkcon_off = 22,
1603         .lrp_off = 15,
1604         .bfs_mask = 0xf,
1605         .rfs_mask = 0x7,
1606         .ftx0cnt_off = 0,
1607 };
1608 
1609 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1610         .bfs_off = 0,
1611         .rfs_off = 3,
1612         .sdf_off = 6,
1613         .txr_off = 8,
1614         .rclksrc_off = 10,
1615         .mss_off = 11,
1616         .cdclkcon_off = 12,
1617         .lrp_off = 15,
1618         .bfs_mask = 0x7,
1619         .rfs_mask = 0x7,
1620         .ftx0cnt_off = 8,
1621 };
1622 
1623 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1624         .quirks = QUIRK_NO_MUXPSR,
1625         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1626         .i2s_variant_regs = &i2sv3_regs,
1627 };
1628 
1629 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1630         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1631                         QUIRK_SUPPORTS_IDMA,
1632         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1633         .i2s_variant_regs = &i2sv3_regs,
1634 };
1635 
1636 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1637         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1638                         QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1639         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1640         .i2s_variant_regs = &i2sv6_regs,
1641 };
1642 
1643 static const struct samsung_i2s_dai_data i2sv7_dai_type = {
1644         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1645                         QUIRK_SUPPORTS_TDM,
1646         .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1647         .i2s_variant_regs = &i2sv7_regs,
1648 };
1649 
1650 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 = {
1651         .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1652         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1653         .i2s_variant_regs = &i2sv5_i2s1_regs,
1654 };
1655 
1656 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1657         {
1658                 .name           = "samsung-i2s",
1659                 .driver_data    = (kernel_ulong_t)&i2sv3_dai_type,
1660         },
1661         {},
1662 };
1663 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1664 
1665 #ifdef CONFIG_OF
1666 static const struct of_device_id exynos_i2s_match[] = {
1667         {
1668                 .compatible = "samsung,s3c6410-i2s",
1669                 .data = &i2sv3_dai_type,
1670         }, {
1671                 .compatible = "samsung,s5pv210-i2s",
1672                 .data = &i2sv5_dai_type,
1673         }, {
1674                 .compatible = "samsung,exynos5420-i2s",
1675                 .data = &i2sv6_dai_type,
1676         }, {
1677                 .compatible = "samsung,exynos7-i2s",
1678                 .data = &i2sv7_dai_type,
1679         }, {
1680                 .compatible = "samsung,exynos7-i2s1",
1681                 .data = &i2sv5_dai_type_i2s1,
1682         },
1683         {},
1684 };
1685 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1686 #endif
1687 
1688 static const struct dev_pm_ops samsung_i2s_pm = {
1689         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1690                                 i2s_runtime_resume, NULL)
1691         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1692                                      pm_runtime_force_resume)
1693 };
1694 
1695 static struct platform_driver samsung_i2s_driver = {
1696         .probe  = samsung_i2s_probe,
1697         .remove = samsung_i2s_remove,
1698         .id_table = samsung_i2s_driver_ids,
1699         .driver = {
1700                 .name = "samsung-i2s",
1701                 .of_match_table = of_match_ptr(exynos_i2s_match),
1702                 .pm = &samsung_i2s_pm,
1703         },
1704 };
1705 
1706 module_platform_driver(samsung_i2s_driver);
1707 
1708 /* Module information */
1709 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1710 MODULE_DESCRIPTION("Samsung I2S Interface");
1711 MODULE_ALIAS("platform:samsung-i2s");
1712 MODULE_LICENSE("GPL");
1713 

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