~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/samsung/i2s.c

Version: ~ [ linux-5.10-rc1 ] ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
214 static inline bool any_active(struct i2s_dai *i2s)
215 {
216         return this_active(i2s) || other_active(i2s);
217 }
218 
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 
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 
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) */
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) */
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) */
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) */
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 */
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 */
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 */
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 */
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 
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 
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 
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                 /* Fall through */
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 */
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 
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 
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 
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 = substream->private_data;
935         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
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 
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
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
1027 static int i2s_suspend(struct snd_soc_dai *dai)
1028 {
1029         return pm_runtime_force_suspend(dai->dev);
1030 }
1031 
1032 static int i2s_resume(struct snd_soc_dai *dai)
1033 {
1034         return pm_runtime_force_resume(dai->dev);
1035 }
1036 #else
1037 #define i2s_suspend NULL
1038 #define i2s_resume  NULL
1039 #endif
1040 
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 
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 
1145 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
1146                           SNDRV_PCM_FMTBIT_S24_LE)
1147 
1148 static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1149                           const struct samsung_i2s_dai_data *i2s_dai_data,
1150                           int num_dais)
1151 {
1152         static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1153         static const char *stream_names[] = { "Primary Playback",
1154                                               "Secondary Playback" };
1155         struct snd_soc_dai_driver *dai_drv;
1156         struct i2s_dai *dai;
1157         int i;
1158 
1159         priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1160                                      sizeof(*dai), GFP_KERNEL);
1161         if (!priv->dai)
1162                 return -ENOMEM;
1163 
1164         priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1165                                      sizeof(*dai_drv), GFP_KERNEL);
1166         if (!priv->dai_drv)
1167                 return -ENOMEM;
1168 
1169         for (i = 0; i < num_dais; i++) {
1170                 dai_drv = &priv->dai_drv[i];
1171 
1172                 dai_drv->probe = samsung_i2s_dai_probe;
1173                 dai_drv->remove = samsung_i2s_dai_remove;
1174                 dai_drv->suspend = i2s_suspend;
1175                 dai_drv->resume = i2s_resume;
1176 
1177                 dai_drv->symmetric_rates = 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
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         if (priv->op_clk)
1215                 clk_disable_unprepare(priv->op_clk);
1216         clk_disable_unprepare(priv->clk);
1217 
1218         return 0;
1219 }
1220 
1221 static int i2s_runtime_resume(struct device *dev)
1222 {
1223         struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1224         int ret;
1225 
1226         ret = clk_prepare_enable(priv->clk);
1227         if (ret)
1228                 return ret;
1229 
1230         if (priv->op_clk) {
1231                 ret = clk_prepare_enable(priv->op_clk);
1232                 if (ret) {
1233                         clk_disable_unprepare(priv->clk);
1234                         return ret;
1235                 }
1236         }
1237 
1238         writel(priv->suspend_i2scon, priv->addr + I2SCON);
1239         writel(priv->suspend_i2smod, priv->addr + I2SMOD);
1240         writel(priv->suspend_i2spsr, priv->addr + I2SPSR);
1241 
1242         return 0;
1243 }
1244 #endif /* CONFIG_PM */
1245 
1246 static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1247 {
1248         int i;
1249 
1250         for (i = 0; i < priv->clk_data.clk_num; i++) {
1251                 if (!IS_ERR(priv->clk_table[i]))
1252                         clk_unregister(priv->clk_table[i]);
1253         }
1254 }
1255 
1256 static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1257 {
1258         of_clk_del_provider(priv->pdev->dev.of_node);
1259         i2s_unregister_clocks(priv);
1260 }
1261 
1262 
1263 static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1264 {
1265 
1266         const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1267         const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1268         const char *p_names[2] = { NULL };
1269         struct device *dev = &priv->pdev->dev;
1270         const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs;
1271         const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1272         struct clk *rclksrc;
1273         int ret, i;
1274 
1275         /* Register the clock provider only if it's expected in the DTB */
1276         if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1277                 return 0;
1278 
1279         /* Get the RCLKSRC mux clock parent clock names */
1280         for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1281                 rclksrc = clk_get(dev, clk_name[i]);
1282                 if (IS_ERR(rclksrc))
1283                         continue;
1284                 p_names[i] = __clk_get_name(rclksrc);
1285                 clk_put(rclksrc);
1286         }
1287 
1288         for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1289                 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1290                                                 dev_name(dev), i2s_clk_desc[i]);
1291                 if (!i2s_clk_name[i])
1292                         return -ENOMEM;
1293         }
1294 
1295         if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
1296                 /* Activate the prescaler */
1297                 u32 val = readl(priv->addr + I2SPSR);
1298                 writel(val | PSR_PSREN, priv->addr + I2SPSR);
1299 
1300                 priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1301                                 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1302                                 ARRAY_SIZE(p_names),
1303                                 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1304                                 priv->addr + I2SMOD, reg_info->rclksrc_off,
1305                                 1, 0, &priv->lock);
1306 
1307                 priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1308                                 i2s_clk_name[CLK_I2S_RCLK_PSR],
1309                                 i2s_clk_name[CLK_I2S_RCLK_SRC],
1310                                 CLK_SET_RATE_PARENT,
1311                                 priv->addr + I2SPSR, 8, 6, 0, &priv->lock);
1312 
1313                 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1314                 priv->clk_data.clk_num = 2;
1315         }
1316 
1317         priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1318                                 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1319                                 CLK_SET_RATE_PARENT,
1320                                 priv->addr + I2SMOD, reg_info->cdclkcon_off,
1321                                 CLK_GATE_SET_TO_DISABLE, &priv->lock);
1322 
1323         priv->clk_data.clk_num += 1;
1324         priv->clk_data.clks = priv->clk_table;
1325 
1326         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1327                                   &priv->clk_data);
1328         if (ret < 0) {
1329                 dev_err(dev, "failed to add clock provider: %d\n", ret);
1330                 i2s_unregister_clocks(priv);
1331         }
1332 
1333         return ret;
1334 }
1335 
1336 /* Create platform device for the secondary PCM */
1337 static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1338 {
1339         struct platform_device *pdev_sec;
1340         const char *devname;
1341         int ret;
1342 
1343         devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec",
1344                                  dev_name(&priv->pdev->dev));
1345         if (!devname)
1346                 return -ENOMEM;
1347 
1348         pdev_sec = platform_device_alloc(devname, -1);
1349         if (!pdev_sec)
1350                 return -ENOMEM;
1351 
1352         pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL);
1353 
1354         ret = platform_device_add(pdev_sec);
1355         if (ret < 0) {
1356                 platform_device_put(pdev_sec);
1357                 return ret;
1358         }
1359 
1360         ret = device_attach(&pdev_sec->dev);
1361         if (ret <= 0) {
1362                 platform_device_unregister(priv->pdev_sec);
1363                 dev_info(&pdev_sec->dev, "device_attach() failed\n");
1364                 return ret;
1365         }
1366 
1367         priv->pdev_sec = pdev_sec;
1368 
1369         return 0;
1370 }
1371 
1372 static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1373 {
1374         platform_device_unregister(priv->pdev_sec);
1375         priv->pdev_sec = NULL;
1376 }
1377 
1378 static int samsung_i2s_probe(struct platform_device *pdev)
1379 {
1380         struct i2s_dai *pri_dai, *sec_dai = NULL;
1381         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1382         u32 regs_base, idma_addr = 0;
1383         struct device_node *np = pdev->dev.of_node;
1384         const struct samsung_i2s_dai_data *i2s_dai_data;
1385         const struct platform_device_id *id;
1386         struct samsung_i2s_priv *priv;
1387         struct resource *res;
1388         int num_dais, ret;
1389 
1390         if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
1391                 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1392         } else {
1393                 id = platform_get_device_id(pdev);
1394 
1395                 /* Nothing to do if it is the secondary device probe */
1396                 if (!id)
1397                         return 0;
1398 
1399                 i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data;
1400         }
1401 
1402         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1403         if (!priv)
1404                 return -ENOMEM;
1405 
1406         if (np) {
1407                 priv->quirks = i2s_dai_data->quirks;
1408         } else {
1409                 if (!i2s_pdata) {
1410                         dev_err(&pdev->dev, "Missing platform data\n");
1411                         return -EINVAL;
1412                 }
1413                 priv->quirks = i2s_pdata->type.quirks;
1414         }
1415 
1416         num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1;
1417         priv->pdev = pdev;
1418         priv->variant_regs = i2s_dai_data->i2s_variant_regs;
1419 
1420         ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1421         if (ret < 0)
1422                 return ret;
1423 
1424         pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1425 
1426         spin_lock_init(&priv->lock);
1427         spin_lock_init(&priv->pcm_lock);
1428 
1429         if (!np) {
1430                 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1431                 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1432                 pri_dai->filter = i2s_pdata->dma_filter;
1433 
1434                 idma_addr = i2s_pdata->type.idma_addr;
1435         } else {
1436                 if (of_property_read_u32(np, "samsung,idma-addr",
1437                                          &idma_addr)) {
1438                         if (priv->quirks & QUIRK_SUPPORTS_IDMA) {
1439                                 dev_info(&pdev->dev, "idma address is not"\
1440                                                 "specified");
1441                         }
1442                 }
1443         }
1444 
1445         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1446         priv->addr = devm_ioremap_resource(&pdev->dev, res);
1447         if (IS_ERR(priv->addr))
1448                 return PTR_ERR(priv->addr);
1449 
1450         regs_base = res->start;
1451 
1452         priv->clk = devm_clk_get(&pdev->dev, "iis");
1453         if (IS_ERR(priv->clk)) {
1454                 dev_err(&pdev->dev, "Failed to get iis clock\n");
1455                 return PTR_ERR(priv->clk);
1456         }
1457 
1458         ret = clk_prepare_enable(priv->clk);
1459         if (ret != 0) {
1460                 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1461                 return ret;
1462         }
1463         pri_dai->dma_playback.addr = regs_base + I2STXD;
1464         pri_dai->dma_capture.addr = regs_base + I2SRXD;
1465         pri_dai->dma_playback.chan_name = "tx";
1466         pri_dai->dma_capture.chan_name = "rx";
1467         pri_dai->dma_playback.addr_width = 4;
1468         pri_dai->dma_capture.addr_width = 4;
1469         pri_dai->priv = priv;
1470 
1471         if (priv->quirks & QUIRK_PRI_6CHAN)
1472                 pri_dai->drv->playback.channels_max = 6;
1473 
1474         ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1475                                                  "tx", "rx", NULL);
1476         if (ret < 0)
1477                 goto err_disable_clk;
1478 
1479         if (priv->quirks & QUIRK_SEC_DAI) {
1480                 sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1481 
1482                 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1483                 sec_dai->dma_playback.chan_name = "tx-sec";
1484 
1485                 if (!np) {
1486                         sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1487                         sec_dai->filter = i2s_pdata->dma_filter;
1488                 }
1489 
1490                 sec_dai->dma_playback.addr_width = 4;
1491                 sec_dai->idma_playback.addr = idma_addr;
1492                 sec_dai->pri_dai = pri_dai;
1493                 sec_dai->priv = priv;
1494                 pri_dai->sec_dai = sec_dai;
1495 
1496                 ret = i2s_create_secondary_device(priv);
1497                 if (ret < 0)
1498                         goto err_disable_clk;
1499 
1500                 ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1501                                                 sec_dai->filter, "tx-sec", NULL,
1502                                                 &pdev->dev);
1503                 if (ret < 0)
1504                         goto err_del_sec;
1505 
1506         }
1507 
1508         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1509                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1510                 ret = -EINVAL;
1511                 goto err_del_sec;
1512         }
1513 
1514         dev_set_drvdata(&pdev->dev, priv);
1515 
1516         ret = devm_snd_soc_register_component(&pdev->dev,
1517                                         &samsung_i2s_component,
1518                                         priv->dai_drv, num_dais);
1519         if (ret < 0)
1520                 goto err_del_sec;
1521 
1522         pm_runtime_set_active(&pdev->dev);
1523         pm_runtime_enable(&pdev->dev);
1524 
1525         ret = i2s_register_clock_provider(priv);
1526         if (ret < 0)
1527                 goto err_disable_pm;
1528 
1529         priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1530 
1531         return 0;
1532 
1533 err_disable_pm:
1534         pm_runtime_disable(&pdev->dev);
1535 err_del_sec:
1536         i2s_delete_secondary_device(priv);
1537 err_disable_clk:
1538         clk_disable_unprepare(priv->clk);
1539         return ret;
1540 }
1541 
1542 static int samsung_i2s_remove(struct platform_device *pdev)
1543 {
1544         struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1545 
1546         /* The secondary device has no driver data assigned */
1547         if (!priv)
1548                 return 0;
1549 
1550         pm_runtime_get_sync(&pdev->dev);
1551         pm_runtime_disable(&pdev->dev);
1552 
1553         i2s_unregister_clock_provider(priv);
1554         i2s_delete_secondary_device(priv);
1555         clk_disable_unprepare(priv->clk);
1556 
1557         pm_runtime_put_noidle(&pdev->dev);
1558 
1559         return 0;
1560 }
1561 
1562 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1563         .bfs_off = 1,
1564         .rfs_off = 3,
1565         .sdf_off = 5,
1566         .txr_off = 8,
1567         .rclksrc_off = 10,
1568         .mss_off = 11,
1569         .cdclkcon_off = 12,
1570         .lrp_off = 7,
1571         .bfs_mask = 0x3,
1572         .rfs_mask = 0x3,
1573         .ftx0cnt_off = 8,
1574 };
1575 
1576 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1577         .bfs_off = 0,
1578         .rfs_off = 4,
1579         .sdf_off = 6,
1580         .txr_off = 8,
1581         .rclksrc_off = 10,
1582         .mss_off = 11,
1583         .cdclkcon_off = 12,
1584         .lrp_off = 15,
1585         .bfs_mask = 0xf,
1586         .rfs_mask = 0x3,
1587         .ftx0cnt_off = 8,
1588 };
1589 
1590 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1591         .bfs_off = 0,
1592         .rfs_off = 4,
1593         .sdf_off = 7,
1594         .txr_off = 9,
1595         .rclksrc_off = 11,
1596         .mss_off = 12,
1597         .cdclkcon_off = 22,
1598         .lrp_off = 15,
1599         .bfs_mask = 0xf,
1600         .rfs_mask = 0x7,
1601         .ftx0cnt_off = 0,
1602 };
1603 
1604 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1605         .bfs_off = 0,
1606         .rfs_off = 3,
1607         .sdf_off = 6,
1608         .txr_off = 8,
1609         .rclksrc_off = 10,
1610         .mss_off = 11,
1611         .cdclkcon_off = 12,
1612         .lrp_off = 15,
1613         .bfs_mask = 0x7,
1614         .rfs_mask = 0x7,
1615         .ftx0cnt_off = 8,
1616 };
1617 
1618 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1619         .quirks = QUIRK_NO_MUXPSR,
1620         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1621         .i2s_variant_regs = &i2sv3_regs,
1622 };
1623 
1624 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1625         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1626                         QUIRK_SUPPORTS_IDMA,
1627         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1628         .i2s_variant_regs = &i2sv3_regs,
1629 };
1630 
1631 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1632         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1633                         QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1634         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1635         .i2s_variant_regs = &i2sv6_regs,
1636 };
1637 
1638 static const struct samsung_i2s_dai_data i2sv7_dai_type = {
1639         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1640                         QUIRK_SUPPORTS_TDM,
1641         .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1642         .i2s_variant_regs = &i2sv7_regs,
1643 };
1644 
1645 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 = {
1646         .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1647         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1648         .i2s_variant_regs = &i2sv5_i2s1_regs,
1649 };
1650 
1651 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1652         {
1653                 .name           = "samsung-i2s",
1654                 .driver_data    = (kernel_ulong_t)&i2sv3_dai_type,
1655         },
1656         {},
1657 };
1658 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1659 
1660 #ifdef CONFIG_OF
1661 static const struct of_device_id exynos_i2s_match[] = {
1662         {
1663                 .compatible = "samsung,s3c6410-i2s",
1664                 .data = &i2sv3_dai_type,
1665         }, {
1666                 .compatible = "samsung,s5pv210-i2s",
1667                 .data = &i2sv5_dai_type,
1668         }, {
1669                 .compatible = "samsung,exynos5420-i2s",
1670                 .data = &i2sv6_dai_type,
1671         }, {
1672                 .compatible = "samsung,exynos7-i2s",
1673                 .data = &i2sv7_dai_type,
1674         }, {
1675                 .compatible = "samsung,exynos7-i2s1",
1676                 .data = &i2sv5_dai_type_i2s1,
1677         },
1678         {},
1679 };
1680 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1681 #endif
1682 
1683 static const struct dev_pm_ops samsung_i2s_pm = {
1684         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1685                                 i2s_runtime_resume, NULL)
1686         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1687                                      pm_runtime_force_resume)
1688 };
1689 
1690 static struct platform_driver samsung_i2s_driver = {
1691         .probe  = samsung_i2s_probe,
1692         .remove = samsung_i2s_remove,
1693         .id_table = samsung_i2s_driver_ids,
1694         .driver = {
1695                 .name = "samsung-i2s",
1696                 .of_match_table = of_match_ptr(exynos_i2s_match),
1697                 .pm = &samsung_i2s_pm,
1698         },
1699 };
1700 
1701 module_platform_driver(samsung_i2s_driver);
1702 
1703 /* Module information */
1704 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1705 MODULE_DESCRIPTION("Samsung I2S Interface");
1706 MODULE_ALIAS("platform:samsung-i2s");
1707 MODULE_LICENSE("GPL");
1708 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp