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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux.git] / drivers / soundwire / intel.c
blob9db78f3d761522e385681235b692265b312094f8
1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2015-17 Intel Corporation.
3
4 /*
5 * Soundwire Intel Master Driver
6 */
7
8 #include <linux/acpi.h>
9 #include <linux/cleanup.h>
10 #include <linux/debugfs.h>
11 #include <linux/delay.h>
12 #include <linux/io.h>
13 #include <sound/pcm_params.h>
14 #include <linux/pm_runtime.h>
15 #include <sound/soc.h>
16 #include <linux/soundwire/sdw_registers.h>
17 #include <linux/soundwire/sdw.h>
18 #include <linux/soundwire/sdw_intel.h>
19 #include "cadence_master.h"
20 #include "bus.h"
21 #include "intel.h"
22
23 static int intel_wait_bit(void __iomem *base, int offset, u32 mask, u32 target)
24 {
25 int timeout = 10;
26 u32 reg_read;
27
28 do {
29 reg_read = readl(base + offset);
30 if ((reg_read & mask) == target)
31 return 0;
32
33 timeout--;
34 usleep_range(50, 100);
35 } while (timeout != 0);
36
37 return -EAGAIN;
38 }
39
40 static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
41 {
42 writel(value, base + offset);
43 return intel_wait_bit(base, offset, mask, 0);
44 }
45
46 static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
47 {
48 writel(value, base + offset);
49 return intel_wait_bit(base, offset, mask, mask);
50 }
51
52 /*
53 * debugfs
54 */
55 #ifdef CONFIG_DEBUG_FS
56
57 #define RD_BUF (2 * PAGE_SIZE)
58
59 static ssize_t intel_sprintf(void __iomem *mem, bool l,
60 char *buf, size_t pos, unsigned int reg)
61 {
62 int value;
63
64 if (l)
65 value = intel_readl(mem, reg);
66 else
67 value = intel_readw(mem, reg);
68
69 return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value);
70 }
71
72 static int intel_reg_show(struct seq_file *s_file, void *data)
73 {
74 struct sdw_intel *sdw = s_file->private;
75 void __iomem *s = sdw->link_res->shim;
76 void __iomem *a = sdw->link_res->alh;
77 ssize_t ret;
78 int i, j;
79 unsigned int links, reg;
80
81 char *buf __free(kfree) = kzalloc(RD_BUF, GFP_KERNEL);
82 if (!buf)
83 return -ENOMEM;
84
85 links = intel_readl(s, SDW_SHIM_LCAP) & SDW_SHIM_LCAP_LCOUNT_MASK;
86
87 ret = scnprintf(buf, RD_BUF, "Register Value\n");
88 ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
89
90 for (i = 0; i < links; i++) {
91 reg = SDW_SHIM_LCAP + i * 4;
92 ret += intel_sprintf(s, true, buf, ret, reg);
93 }
94
95 for (i = 0; i < links; i++) {
96 ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i);
97 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i));
98 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i));
99 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i));
100 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i));
101 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i));
102 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i));
103
104 ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n");
105
106 /*
107 * the value 10 is the number of PDIs. We will need a
108 * cleanup to remove hard-coded Intel configurations
109 * from cadence_master.c
110 */
111 for (j = 0; j < 10; j++) {
112 ret += intel_sprintf(s, false, buf, ret,
113 SDW_SHIM_PCMSYCHM(i, j));
114 ret += intel_sprintf(s, false, buf, ret,
115 SDW_SHIM_PCMSYCHC(i, j));
116 }
117 ret += scnprintf(buf + ret, RD_BUF - ret, "\n IOCTL, CTMCTL\n");
118
119 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
120 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
121 }
122
123 ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n");
124 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN);
125 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS);
126
127 ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n");
128 for (i = 0; i < SDW_ALH_NUM_STREAMS; i++)
129 ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));
130
131 seq_printf(s_file, "%s", buf);
132
133 return 0;
134 }
135 DEFINE_SHOW_ATTRIBUTE(intel_reg);
136
137 static int intel_set_m_datamode(void *data, u64 value)
138 {
139 struct sdw_intel *sdw = data;
140 struct sdw_bus *bus = &sdw->cdns.bus;
141
142 if (value > SDW_PORT_DATA_MODE_STATIC_1)
143 return -EINVAL;
144
145 /* Userspace changed the hardware state behind the kernel's back */
146 add_taint(TAINT_USER, LOCKDEP_STILL_OK);
147
148 bus->params.m_data_mode = value;
149
150 return 0;
151 }
152 DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL,
153 intel_set_m_datamode, "%llu\n");
154
155 static int intel_set_s_datamode(void *data, u64 value)
156 {
157 struct sdw_intel *sdw = data;
158 struct sdw_bus *bus = &sdw->cdns.bus;
159
160 if (value > SDW_PORT_DATA_MODE_STATIC_1)
161 return -EINVAL;
162
163 /* Userspace changed the hardware state behind the kernel's back */
164 add_taint(TAINT_USER, LOCKDEP_STILL_OK);
165
166 bus->params.s_data_mode = value;
167
168 return 0;
169 }
170 DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL,
171 intel_set_s_datamode, "%llu\n");
172
173 static void intel_debugfs_init(struct sdw_intel *sdw)
174 {
175 struct dentry *root = sdw->cdns.bus.debugfs;
176
177 if (!root)
178 return;
179
180 sdw->debugfs = debugfs_create_dir("intel-sdw", root);
181
182 debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw,
183 &intel_reg_fops);
184
185 debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw,
186 &intel_set_m_datamode_fops);
187
188 debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw,
189 &intel_set_s_datamode_fops);
190
191 sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs);
192 }
193
194 static void intel_debugfs_exit(struct sdw_intel *sdw)
195 {
196 debugfs_remove_recursive(sdw->debugfs);
197 }
198 #else
199 static void intel_debugfs_init(struct sdw_intel *sdw) {}
200 static void intel_debugfs_exit(struct sdw_intel *sdw) {}
201 #endif /* CONFIG_DEBUG_FS */
202
203 /*
204 * shim ops
205 */
206 /* this needs to be called with shim_lock */
207 static void intel_shim_glue_to_master_ip(struct sdw_intel *sdw)
208 {
209 void __iomem *shim = sdw->link_res->shim;
210 unsigned int link_id = sdw->instance;
211 u16 ioctl;
212
213 /* Switch to MIP from Glue logic */
214 ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
215
216 ioctl &= ~(SDW_SHIM_IOCTL_DOE);
217 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
218 usleep_range(10, 15);
219
220 ioctl &= ~(SDW_SHIM_IOCTL_DO);
221 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
222 usleep_range(10, 15);
223
224 ioctl |= (SDW_SHIM_IOCTL_MIF);
225 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
226 usleep_range(10, 15);
227
228 ioctl &= ~(SDW_SHIM_IOCTL_BKE);
229 ioctl &= ~(SDW_SHIM_IOCTL_COE);
230 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
231 usleep_range(10, 15);
232
233 /* at this point Master IP has full control of the I/Os */
234 }
235
236 /* this needs to be called with shim_lock */
237 static void intel_shim_master_ip_to_glue(struct sdw_intel *sdw)
238 {
239 unsigned int link_id = sdw->instance;
240 void __iomem *shim = sdw->link_res->shim;
241 u16 ioctl;
242
243 /* Glue logic */
244 ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
245 ioctl |= SDW_SHIM_IOCTL_BKE;
246 ioctl |= SDW_SHIM_IOCTL_COE;
247 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
248 usleep_range(10, 15);
249
250 ioctl &= ~(SDW_SHIM_IOCTL_MIF);
251 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
252 usleep_range(10, 15);
253
254 /* at this point Integration Glue has full control of the I/Os */
255 }
256
257 /* this needs to be called with shim_lock */
258 static void intel_shim_init(struct sdw_intel *sdw)
259 {
260 void __iomem *shim = sdw->link_res->shim;
261 unsigned int link_id = sdw->instance;
262 u16 ioctl = 0, act;
263
264 /* Initialize Shim */
265 ioctl |= SDW_SHIM_IOCTL_BKE;
266 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
267 usleep_range(10, 15);
268
269 ioctl |= SDW_SHIM_IOCTL_WPDD;
270 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
271 usleep_range(10, 15);
272
273 ioctl |= SDW_SHIM_IOCTL_DO;
274 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
275 usleep_range(10, 15);
276
277 ioctl |= SDW_SHIM_IOCTL_DOE;
278 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
279 usleep_range(10, 15);
280
281 intel_shim_glue_to_master_ip(sdw);
282
283 act = intel_readw(shim, SDW_SHIM_CTMCTL(link_id));
284 u16p_replace_bits(&act, 0x1, SDW_SHIM_CTMCTL_DOAIS);
285 act |= SDW_SHIM_CTMCTL_DACTQE;
286 act |= SDW_SHIM_CTMCTL_DODS;
287 intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
288 usleep_range(10, 15);
289 }
290
291 static int intel_shim_check_wake(struct sdw_intel *sdw)
292 {
293 void __iomem *shim;
294 u16 wake_sts;
295
296 shim = sdw->link_res->shim;
297 wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
298
299 return wake_sts & BIT(sdw->instance);
300 }
301
302 static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
303 {
304 void __iomem *shim = sdw->link_res->shim;
305 unsigned int link_id = sdw->instance;
306 u16 wake_en, wake_sts;
307
308 mutex_lock(sdw->link_res->shim_lock);
309 wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
310
311 if (wake_enable) {
312 /* Enable the wakeup */
313 wake_en |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
314 intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
315 } else {
316 /* Disable the wake up interrupt */
317 wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
318 intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
319
320 /* Clear wake status */
321 wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
322 wake_sts |= (SDW_SHIM_WAKESTS_STATUS << link_id);
323 intel_writew(shim, SDW_SHIM_WAKESTS, wake_sts);
324 }
325 mutex_unlock(sdw->link_res->shim_lock);
326 }
327
328 static bool intel_check_cmdsync_unlocked(struct sdw_intel *sdw)
329 {
330 void __iomem *shim = sdw->link_res->shim;
331 int sync_reg;
332
333 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
334 return !!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK);
335 }
336
337 static int intel_link_power_up(struct sdw_intel *sdw)
338 {
339 unsigned int link_id = sdw->instance;
340 void __iomem *shim = sdw->link_res->shim;
341 u32 *shim_mask = sdw->link_res->shim_mask;
342 struct sdw_bus *bus = &sdw->cdns.bus;
343 struct sdw_master_prop *prop = &bus->prop;
344 u32 spa_mask, cpa_mask;
345 u32 link_control;
346 int ret = 0;
347 u32 clock_source;
348 u32 syncprd;
349 u32 sync_reg;
350 bool lcap_mlcs;
351
352 mutex_lock(sdw->link_res->shim_lock);
353
354 /*
355 * The hardware relies on an internal counter, typically 4kHz,
356 * to generate the SoundWire SSP - which defines a 'safe'
357 * synchronization point between commands and audio transport
358 * and allows for multi link synchronization. The SYNCPRD value
359 * is only dependent on the oscillator clock provided to
360 * the IP, so adjust based on _DSD properties reported in DSDT
361 * tables. The values reported are based on either 24MHz
362 * (CNL/CML) or 38.4 MHz (ICL/TGL+). On MeteorLake additional
363 * frequencies are available with the MLCS clock source selection.
364 */
365 lcap_mlcs = intel_readl(shim, SDW_SHIM_LCAP) & SDW_SHIM_LCAP_MLCS_MASK;
366
367 if (prop->mclk_freq % 6000000) {
368 if (prop->mclk_freq % 2400000) {
369 if (lcap_mlcs) {
370 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24_576;
371 clock_source = SDW_SHIM_MLCS_CARDINAL_CLK;
372 } else {
373 dev_err(sdw->cdns.dev, "%s: invalid clock configuration, mclk %d lcap_mlcs %d\n",
374 __func__, prop->mclk_freq, lcap_mlcs);
375 ret = -EINVAL;
376 goto out;
377 }
378 } else {
379 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
380 clock_source = SDW_SHIM_MLCS_XTAL_CLK;
381 }
382 } else {
383 if (lcap_mlcs) {
384 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_96;
385 clock_source = SDW_SHIM_MLCS_AUDIO_PLL_CLK;
386 } else {
387 syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
388 clock_source = SDW_SHIM_MLCS_XTAL_CLK;
389 }
390 }
391
392 if (!*shim_mask) {
393 dev_dbg(sdw->cdns.dev, "powering up all links\n");
394
395 /* we first need to program the SyncPRD/CPU registers */
396 dev_dbg(sdw->cdns.dev,
397 "first link up, programming SYNCPRD\n");
398
399 /* set SyncPRD period */
400 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
401 u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD);
402
403 /* Set SyncCPU bit */
404 sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
405 intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
406
407 /* Link power up sequence */
408 link_control = intel_readl(shim, SDW_SHIM_LCTL);
409
410 /* only power-up enabled links */
411 spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask);
412 cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
413
414 link_control |= spa_mask;
415
416 ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
417 if (ret < 0) {
418 dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret);
419 goto out;
420 }
421
422 /* SyncCPU will change once link is active */
423 ret = intel_wait_bit(shim, SDW_SHIM_SYNC,
424 SDW_SHIM_SYNC_SYNCCPU, 0);
425 if (ret < 0) {
426 dev_err(sdw->cdns.dev,
427 "Failed to set SHIM_SYNC: %d\n", ret);
428 goto out;
429 }
430
431 /* update link clock if needed */
432 if (lcap_mlcs) {
433 link_control = intel_readl(shim, SDW_SHIM_LCTL);
434 u32p_replace_bits(&link_control, clock_source, SDW_SHIM_LCTL_MLCS_MASK);
435 intel_writel(shim, SDW_SHIM_LCTL, link_control);
436 }
437 }
438
439 *shim_mask |= BIT(link_id);
440
441 sdw->cdns.link_up = true;
442
443 intel_shim_init(sdw);
444
445 out:
446 mutex_unlock(sdw->link_res->shim_lock);
447
448 return ret;
449 }
450
451 static int intel_link_power_down(struct sdw_intel *sdw)
452 {
453 u32 link_control, spa_mask, cpa_mask;
454 unsigned int link_id = sdw->instance;
455 void __iomem *shim = sdw->link_res->shim;
456 u32 *shim_mask = sdw->link_res->shim_mask;
457 int ret = 0;
458
459 mutex_lock(sdw->link_res->shim_lock);
460
461 if (!(*shim_mask & BIT(link_id)))
462 dev_err(sdw->cdns.dev,
463 "%s: Unbalanced power-up/down calls\n", __func__);
464
465 sdw->cdns.link_up = false;
466
467 intel_shim_master_ip_to_glue(sdw);
468
469 *shim_mask &= ~BIT(link_id);
470
471 if (!*shim_mask) {
472
473 dev_dbg(sdw->cdns.dev, "powering down all links\n");
474
475 /* Link power down sequence */
476 link_control = intel_readl(shim, SDW_SHIM_LCTL);
477
478 /* only power-down enabled links */
479 spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, ~sdw->link_res->link_mask);
480 cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
481
482 link_control &= spa_mask;
483
484 ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
485 if (ret < 0) {
486 dev_err(sdw->cdns.dev, "%s: could not power down link\n", __func__);
487
488 /*
489 * we leave the sdw->cdns.link_up flag as false since we've disabled
490 * the link at this point and cannot handle interrupts any longer.
491 */
492 }
493 }
494
495 mutex_unlock(sdw->link_res->shim_lock);
496
497 return ret;
498 }
499
500 static void intel_shim_sync_arm(struct sdw_intel *sdw)
501 {
502 void __iomem *shim = sdw->link_res->shim;
503 u32 sync_reg;
504
505 mutex_lock(sdw->link_res->shim_lock);
506
507 /* update SYNC register */
508 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
509 sync_reg |= (SDW_SHIM_SYNC_CMDSYNC << sdw->instance);
510 intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
511
512 mutex_unlock(sdw->link_res->shim_lock);
513 }
514
515 static int intel_shim_sync_go_unlocked(struct sdw_intel *sdw)
516 {
517 void __iomem *shim = sdw->link_res->shim;
518 u32 sync_reg;
519
520 /* Read SYNC register */
521 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
522
523 /*
524 * Set SyncGO bit to synchronously trigger a bank switch for
525 * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all
526 * the Masters.
527 */
528 sync_reg |= SDW_SHIM_SYNC_SYNCGO;
529
530 intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
531
532 return 0;
533 }
534
535 static int intel_shim_sync_go(struct sdw_intel *sdw)
536 {
537 int ret;
538
539 mutex_lock(sdw->link_res->shim_lock);
540
541 ret = intel_shim_sync_go_unlocked(sdw);
542
543 mutex_unlock(sdw->link_res->shim_lock);
544
545 return ret;
546 }
547
548 /*
549 * PDI routines
550 */
551 static void intel_pdi_init(struct sdw_intel *sdw,
552 struct sdw_cdns_stream_config *config)
553 {
554 void __iomem *shim = sdw->link_res->shim;
555 unsigned int link_id = sdw->instance;
556 int pcm_cap;
557
558 /* PCM Stream Capability */
559 pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
560
561 config->pcm_bd = FIELD_GET(SDW_SHIM_PCMSCAP_BSS, pcm_cap);
562 config->pcm_in = FIELD_GET(SDW_SHIM_PCMSCAP_ISS, pcm_cap);
563 config->pcm_out = FIELD_GET(SDW_SHIM_PCMSCAP_OSS, pcm_cap);
564
565 dev_dbg(sdw->cdns.dev, "PCM cap bd:%d in:%d out:%d\n",
566 config->pcm_bd, config->pcm_in, config->pcm_out);
567 }
568
569 static int
570 intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num)
571 {
572 void __iomem *shim = sdw->link_res->shim;
573 unsigned int link_id = sdw->instance;
574 int count;
575
576 count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
577
578 /*
579 * WORKAROUND: on all existing Intel controllers, pdi
580 * number 2 reports channel count as 1 even though it
581 * supports 8 channels. Performing hardcoding for pdi
582 * number 2.
583 */
584 if (pdi_num == 2)
585 count = 7;
586
587 /* zero based values for channel count in register */
588 count++;
589
590 return count;
591 }
592
593 static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
594 struct sdw_cdns_pdi *pdi,
595 unsigned int num_pdi,
596 unsigned int *num_ch)
597 {
598 int i, ch_count = 0;
599
600 for (i = 0; i < num_pdi; i++) {
601 pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num);
602 ch_count += pdi->ch_count;
603 pdi++;
604 }
605
606 *num_ch = ch_count;
607 return 0;
608 }
609
610 static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
611 struct sdw_cdns_streams *stream)
612 {
613 intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
614 &stream->num_ch_bd);
615
616 intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
617 &stream->num_ch_in);
618
619 intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
620 &stream->num_ch_out);
621
622 return 0;
623 }
624
625 static void
626 intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
627 {
628 void __iomem *shim = sdw->link_res->shim;
629 unsigned int link_id = sdw->instance;
630 int pdi_conf = 0;
631
632 /* the Bulk and PCM streams are not contiguous */
633 pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
634 if (pdi->num >= 2)
635 pdi->intel_alh_id += 2;
636
637 /*
638 * Program stream parameters to stream SHIM register
639 * This is applicable for PCM stream only.
640 */
641 if (pdi->type != SDW_STREAM_PCM)
642 return;
643
644 if (pdi->dir == SDW_DATA_DIR_RX)
645 pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
646 else
647 pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
648
649 u32p_replace_bits(&pdi_conf, pdi->intel_alh_id, SDW_SHIM_PCMSYCM_STREAM);
650 u32p_replace_bits(&pdi_conf, pdi->l_ch_num, SDW_SHIM_PCMSYCM_LCHN);
651 u32p_replace_bits(&pdi_conf, pdi->h_ch_num, SDW_SHIM_PCMSYCM_HCHN);
652
653 intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
654 }
655
656 static void
657 intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
658 {
659 void __iomem *alh = sdw->link_res->alh;
660 unsigned int link_id = sdw->instance;
661 unsigned int conf;
662
663 /* the Bulk and PCM streams are not contiguous */
664 pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
665 if (pdi->num >= 2)
666 pdi->intel_alh_id += 2;
667
668 /* Program Stream config ALH register */
669 conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
670
671 u32p_replace_bits(&conf, SDW_ALH_STRMZCFG_DMAT_VAL, SDW_ALH_STRMZCFG_DMAT);
672 u32p_replace_bits(&conf, pdi->ch_count - 1, SDW_ALH_STRMZCFG_CHN);
673
674 intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
675 }
676
677 static int intel_params_stream(struct sdw_intel *sdw,
678 struct snd_pcm_substream *substream,
679 struct snd_soc_dai *dai,
680 struct snd_pcm_hw_params *hw_params,
681 int link_id, int alh_stream_id)
682 {
683 struct sdw_intel_link_res *res = sdw->link_res;
684 struct sdw_intel_stream_params_data params_data;
685
686 params_data.substream = substream;
687 params_data.dai = dai;
688 params_data.hw_params = hw_params;
689 params_data.link_id = link_id;
690 params_data.alh_stream_id = alh_stream_id;
691
692 if (res->ops && res->ops->params_stream && res->dev)
693 return res->ops->params_stream(res->dev,
694 &params_data);
695 return -EIO;
696 }
697
698 /*
699 * DAI routines
700 */
701
702 static int intel_free_stream(struct sdw_intel *sdw,
703 struct snd_pcm_substream *substream,
704 struct snd_soc_dai *dai,
705 int link_id)
706 {
707 struct sdw_intel_link_res *res = sdw->link_res;
708 struct sdw_intel_stream_free_data free_data;
709
710 free_data.substream = substream;
711 free_data.dai = dai;
712 free_data.link_id = link_id;
713
714 if (res->ops && res->ops->free_stream && res->dev)
715 return res->ops->free_stream(res->dev, &free_data);
716
717 return 0;
718 }
719
720 static int intel_hw_params(struct snd_pcm_substream *substream,
721 struct snd_pcm_hw_params *params,
722 struct snd_soc_dai *dai)
723 {
724 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
725 struct sdw_intel *sdw = cdns_to_intel(cdns);
726 struct sdw_cdns_dai_runtime *dai_runtime;
727 struct sdw_cdns_pdi *pdi;
728 struct sdw_stream_config sconfig;
729 int ch, dir;
730 int ret;
731
732 dai_runtime = cdns->dai_runtime_array[dai->id];
733 if (!dai_runtime)
734 return -EIO;
735
736 ch = params_channels(params);
737 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
738 dir = SDW_DATA_DIR_RX;
739 else
740 dir = SDW_DATA_DIR_TX;
741
742 pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id);
743
744 if (!pdi)
745 return -EINVAL;
746
747 /* do run-time configurations for SHIM, ALH and PDI/PORT */
748 intel_pdi_shim_configure(sdw, pdi);
749 intel_pdi_alh_configure(sdw, pdi);
750 sdw_cdns_config_stream(cdns, ch, dir, pdi);
751
752 /* store pdi and hw_params, may be needed in prepare step */
753 dai_runtime->paused = false;
754 dai_runtime->suspended = false;
755 dai_runtime->pdi = pdi;
756
757 /* Inform DSP about PDI stream number */
758 ret = intel_params_stream(sdw, substream, dai, params,
759 sdw->instance,
760 pdi->intel_alh_id);
761 if (ret)
762 return ret;
763
764 sconfig.direction = dir;
765 sconfig.ch_count = ch;
766 sconfig.frame_rate = params_rate(params);
767 sconfig.type = dai_runtime->stream_type;
768
769 sconfig.bps = snd_pcm_format_width(params_format(params));
770
771 /* Port configuration */
772 struct sdw_port_config *pconfig __free(kfree) = kzalloc(sizeof(*pconfig),
773 GFP_KERNEL);
774 if (!pconfig)
775 return -ENOMEM;
776
777 pconfig->num = pdi->num;
778 pconfig->ch_mask = (1 << ch) - 1;
779
780 ret = sdw_stream_add_master(&cdns->bus, &sconfig,
781 pconfig, 1, dai_runtime->stream);
782 if (ret)
783 dev_err(cdns->dev, "add master to stream failed:%d\n", ret);
784
785 return ret;
786 }
787
788 static int intel_prepare(struct snd_pcm_substream *substream,
789 struct snd_soc_dai *dai)
790 {
791 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
792 struct sdw_intel *sdw = cdns_to_intel(cdns);
793 struct sdw_cdns_dai_runtime *dai_runtime;
794 int ch, dir;
795 int ret = 0;
796
797 dai_runtime = cdns->dai_runtime_array[dai->id];
798 if (!dai_runtime) {
799 dev_err(dai->dev, "failed to get dai runtime in %s\n",
800 __func__);
801 return -EIO;
802 }
803
804 if (dai_runtime->suspended) {
805 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
806 struct snd_pcm_hw_params *hw_params;
807
808 hw_params = &rtd->dpcm[substream->stream].hw_params;
809
810 dai_runtime->suspended = false;
811
812 /*
813 * .prepare() is called after system resume, where we
814 * need to reinitialize the SHIM/ALH/Cadence IP.
815 * .prepare() is also called to deal with underflows,
816 * but in those cases we cannot touch ALH/SHIM
817 * registers
818 */
819
820 /* configure stream */
821 ch = params_channels(hw_params);
822 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
823 dir = SDW_DATA_DIR_RX;
824 else
825 dir = SDW_DATA_DIR_TX;
826
827 intel_pdi_shim_configure(sdw, dai_runtime->pdi);
828 intel_pdi_alh_configure(sdw, dai_runtime->pdi);
829 sdw_cdns_config_stream(cdns, ch, dir, dai_runtime->pdi);
830
831 /* Inform DSP about PDI stream number */
832 ret = intel_params_stream(sdw, substream, dai,
833 hw_params,
834 sdw->instance,
835 dai_runtime->pdi->intel_alh_id);
836 }
837
838 return ret;
839 }
840
841 static int
842 intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
843 {
844 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
845 struct sdw_intel *sdw = cdns_to_intel(cdns);
846 struct sdw_cdns_dai_runtime *dai_runtime;
847 int ret;
848
849 dai_runtime = cdns->dai_runtime_array[dai->id];
850 if (!dai_runtime)
851 return -EIO;
852
853 /*
854 * The sdw stream state will transition to RELEASED when stream->
855 * master_list is empty. So the stream state will transition to
856 * DEPREPARED for the first cpu-dai and to RELEASED for the last
857 * cpu-dai.
858 */
859 ret = sdw_stream_remove_master(&cdns->bus, dai_runtime->stream);
860 if (ret < 0) {
861 dev_err(dai->dev, "remove master from stream %s failed: %d\n",
862 dai_runtime->stream->name, ret);
863 return ret;
864 }
865
866 ret = intel_free_stream(sdw, substream, dai, sdw->instance);
867 if (ret < 0) {
868 dev_err(dai->dev, "intel_free_stream: failed %d\n", ret);
869 return ret;
870 }
871
872 dai_runtime->pdi = NULL;
873
874 return 0;
875 }
876
877 static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
878 void *stream, int direction)
879 {
880 return cdns_set_sdw_stream(dai, stream, direction);
881 }
882
883 static void *intel_get_sdw_stream(struct snd_soc_dai *dai,
884 int direction)
885 {
886 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
887 struct sdw_cdns_dai_runtime *dai_runtime;
888
889 dai_runtime = cdns->dai_runtime_array[dai->id];
890 if (!dai_runtime)
891 return ERR_PTR(-EINVAL);
892
893 return dai_runtime->stream;
894 }
895
896 static int intel_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
897 {
898 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
899 struct sdw_cdns_dai_runtime *dai_runtime;
900 int ret = 0;
901
902 dai_runtime = cdns->dai_runtime_array[dai->id];
903 if (!dai_runtime) {
904 dev_err(dai->dev, "failed to get dai runtime in %s\n",
905 __func__);
906 return -EIO;
907 }
908
909 switch (cmd) {
910 case SNDRV_PCM_TRIGGER_SUSPEND:
911
912 /*
913 * The .prepare callback is used to deal with xruns and resume operations.
914 * In the case of xruns, the DMAs and SHIM registers cannot be touched,
915 * but for resume operations the DMAs and SHIM registers need to be initialized.
916 * the .trigger callback is used to track the suspend case only.
917 */
918
919 dai_runtime->suspended = true;
920
921 break;
922
923 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
924 dai_runtime->paused = true;
925 break;
926 case SNDRV_PCM_TRIGGER_STOP:
927 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
928 dai_runtime->paused = false;
929 break;
930 default:
931 break;
932 }
933
934 return ret;
935 }
936
937 static int intel_component_probe(struct snd_soc_component *component)
938 {
939 int ret;
940
941 /*
942 * make sure the device is pm_runtime_active before initiating
943 * bus transactions during the card registration.
944 * We use pm_runtime_resume() here, without taking a reference
945 * and releasing it immediately.
946 */
947 ret = pm_runtime_resume(component->dev);
948 if (ret < 0 && ret != -EACCES)
949 return ret;
950
951 return 0;
952 }
953
954 static int intel_component_dais_suspend(struct snd_soc_component *component)
955 {
956 struct snd_soc_dai *dai;
957
958 /*
959 * In the corner case where a SUSPEND happens during a PAUSE, the ALSA core
960 * does not throw the TRIGGER_SUSPEND. This leaves the DAIs in an unbalanced state.
961 * Since the component suspend is called last, we can trap this corner case
962 * and force the DAIs to release their resources.
963 */
964 for_each_component_dais(component, dai) {
965 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
966 struct sdw_cdns_dai_runtime *dai_runtime;
967
968 dai_runtime = cdns->dai_runtime_array[dai->id];
969
970 if (!dai_runtime)
971 continue;
972
973 if (dai_runtime->suspended)
974 continue;
975
976 if (dai_runtime->paused)
977 dai_runtime->suspended = true;
978 }
979
980 return 0;
981 }
982
983 static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
984 .hw_params = intel_hw_params,
985 .prepare = intel_prepare,
986 .hw_free = intel_hw_free,
987 .trigger = intel_trigger,
988 .set_stream = intel_pcm_set_sdw_stream,
989 .get_stream = intel_get_sdw_stream,
990 };
991
992 static const struct snd_soc_component_driver dai_component = {
993 .name = "soundwire",
994 .probe = intel_component_probe,
995 .suspend = intel_component_dais_suspend,
996 .legacy_dai_naming = 1,
997 };
998
999 static int intel_create_dai(struct sdw_cdns *cdns,
1000 struct snd_soc_dai_driver *dais,
1001 enum intel_pdi_type type,
1002 u32 num, u32 off, u32 max_ch)
1003 {
1004 int i;
1005
1006 if (num == 0)
1007 return 0;
1008
1009 for (i = off; i < (off + num); i++) {
1010 dais[i].name = devm_kasprintf(cdns->dev, GFP_KERNEL,
1011 "SDW%d Pin%d",
1012 cdns->instance, i);
1013 if (!dais[i].name)
1014 return -ENOMEM;
1015
1016 if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
1017 dais[i].playback.channels_min = 1;
1018 dais[i].playback.channels_max = max_ch;
1019 }
1020
1021 if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
1022 dais[i].capture.channels_min = 1;
1023 dais[i].capture.channels_max = max_ch;
1024 }
1025
1026 dais[i].ops = &intel_pcm_dai_ops;
1027 }
1028
1029 return 0;
1030 }
1031
1032 static int intel_register_dai(struct sdw_intel *sdw)
1033 {
1034 struct sdw_cdns_dai_runtime **dai_runtime_array;
1035 struct sdw_cdns_stream_config config;
1036 struct sdw_cdns *cdns = &sdw->cdns;
1037 struct sdw_cdns_streams *stream;
1038 struct snd_soc_dai_driver *dais;
1039 int num_dai, ret, off = 0;
1040
1041 /* Read the PDI config and initialize cadence PDI */
1042 intel_pdi_init(sdw, &config);
1043 ret = sdw_cdns_pdi_init(cdns, config);
1044 if (ret)
1045 return ret;
1046
1047 intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm);
1048
1049 /* DAIs are created based on total number of PDIs supported */
1050 num_dai = cdns->pcm.num_pdi;
1051
1052 dai_runtime_array = devm_kcalloc(cdns->dev, num_dai,
1053 sizeof(struct sdw_cdns_dai_runtime *),
1054 GFP_KERNEL);
1055 if (!dai_runtime_array)
1056 return -ENOMEM;
1057 cdns->dai_runtime_array = dai_runtime_array;
1058
1059 dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
1060 if (!dais)
1061 return -ENOMEM;
1062
1063 /* Create PCM DAIs */
1064 stream = &cdns->pcm;
1065
1066 ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pcm.num_in,
1067 off, stream->num_ch_in);
1068 if (ret)
1069 return ret;
1070
1071 off += cdns->pcm.num_in;
1072 ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pcm.num_out,
1073 off, stream->num_ch_out);
1074 if (ret)
1075 return ret;
1076
1077 off += cdns->pcm.num_out;
1078 ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pcm.num_bd,
1079 off, stream->num_ch_bd);
1080 if (ret)
1081 return ret;
1082
1083 return devm_snd_soc_register_component(cdns->dev, &dai_component,
1084 dais, num_dai);
1085 }
1086
1087
1088 const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
1089 .debugfs_init = intel_debugfs_init,
1090 .debugfs_exit = intel_debugfs_exit,
1091
1092 .register_dai = intel_register_dai,
1093
1094 .check_clock_stop = intel_check_clock_stop,
1095 .start_bus = intel_start_bus,
1096 .start_bus_after_reset = intel_start_bus_after_reset,
1097 .start_bus_after_clock_stop = intel_start_bus_after_clock_stop,
1098 .stop_bus = intel_stop_bus,
1099
1100 .link_power_up = intel_link_power_up,
1101 .link_power_down = intel_link_power_down,
1102
1103 .shim_check_wake = intel_shim_check_wake,
1104 .shim_wake = intel_shim_wake,
1105
1106 .pre_bank_switch = intel_pre_bank_switch,
1107 .post_bank_switch = intel_post_bank_switch,
1108
1109 .sync_arm = intel_shim_sync_arm,
1110 .sync_go_unlocked = intel_shim_sync_go_unlocked,
1111 .sync_go = intel_shim_sync_go,
1112 .sync_check_cmdsync_unlocked = intel_check_cmdsync_unlocked,
1113 };
1114 EXPORT_SYMBOL_NS(sdw_intel_cnl_hw_ops, "SOUNDWIRE_INTEL");
Linux Kernel