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rtc: pcf8523: don't return invalid date when battery is low
[linux-2.6-block.git] / drivers / soundwire / intel.c
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71bb8a1b
VK		 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/delay.h>
10#include <linux/interrupt.h>
11#include <linux/platform_device.h>
37a2d22b
VK		 12#include <sound/pcm_params.h>
13#include <sound/soc.h>
71bb8a1b
VK		 14#include <linux/soundwire/sdw_registers.h>
15#include <linux/soundwire/sdw.h>
16#include <linux/soundwire/sdw_intel.h>
17#include "cadence_master.h"
18#include "intel.h"
19
20/* Intel SHIM Registers Definition */
21#define SDW_SHIM_LCAP 0x0
22#define SDW_SHIM_LCTL 0x4
23#define SDW_SHIM_IPPTR 0x8
24#define SDW_SHIM_SYNC 0xC
25
26#define SDW_SHIM_CTLSCAP(x) (0x010 + 0x60 * x)
27#define SDW_SHIM_CTLS0CM(x) (0x012 + 0x60 * x)
28#define SDW_SHIM_CTLS1CM(x) (0x014 + 0x60 * x)
29#define SDW_SHIM_CTLS2CM(x) (0x016 + 0x60 * x)
30#define SDW_SHIM_CTLS3CM(x) (0x018 + 0x60 * x)
31#define SDW_SHIM_PCMSCAP(x) (0x020 + 0x60 * x)
32
33#define SDW_SHIM_PCMSYCHM(x, y) (0x022 + (0x60 * x) + (0x2 * y))
34#define SDW_SHIM_PCMSYCHC(x, y) (0x042 + (0x60 * x) + (0x2 * y))
35#define SDW_SHIM_PDMSCAP(x) (0x062 + 0x60 * x)
36#define SDW_SHIM_IOCTL(x) (0x06C + 0x60 * x)
37#define SDW_SHIM_CTMCTL(x) (0x06E + 0x60 * x)
38
39#define SDW_SHIM_WAKEEN 0x190
40#define SDW_SHIM_WAKESTS 0x192
41
42#define SDW_SHIM_LCTL_SPA BIT(0)
43#define SDW_SHIM_LCTL_CPA BIT(8)
44
45#define SDW_SHIM_SYNC_SYNCPRD_VAL 0x176F
46#define SDW_SHIM_SYNC_SYNCPRD GENMASK(14, 0)
47#define SDW_SHIM_SYNC_SYNCCPU BIT(15)
48#define SDW_SHIM_SYNC_CMDSYNC_MASK GENMASK(19, 16)
49#define SDW_SHIM_SYNC_CMDSYNC BIT(16)
50#define SDW_SHIM_SYNC_SYNCGO BIT(24)
51
52#define SDW_SHIM_PCMSCAP_ISS GENMASK(3, 0)
53#define SDW_SHIM_PCMSCAP_OSS GENMASK(7, 4)
54#define SDW_SHIM_PCMSCAP_BSS GENMASK(12, 8)
55
56#define SDW_SHIM_PCMSYCM_LCHN GENMASK(3, 0)
57#define SDW_SHIM_PCMSYCM_HCHN GENMASK(7, 4)
58#define SDW_SHIM_PCMSYCM_STREAM GENMASK(13, 8)
59#define SDW_SHIM_PCMSYCM_DIR BIT(15)
60
61#define SDW_SHIM_PDMSCAP_ISS GENMASK(3, 0)
62#define SDW_SHIM_PDMSCAP_OSS GENMASK(7, 4)
63#define SDW_SHIM_PDMSCAP_BSS GENMASK(12, 8)
64#define SDW_SHIM_PDMSCAP_CPSS GENMASK(15, 13)
65
66#define SDW_SHIM_IOCTL_MIF BIT(0)
67#define SDW_SHIM_IOCTL_CO BIT(1)
68#define SDW_SHIM_IOCTL_COE BIT(2)
69#define SDW_SHIM_IOCTL_DO BIT(3)
70#define SDW_SHIM_IOCTL_DOE BIT(4)
71#define SDW_SHIM_IOCTL_BKE BIT(5)
72#define SDW_SHIM_IOCTL_WPDD BIT(6)
73#define SDW_SHIM_IOCTL_CIBD BIT(8)
74#define SDW_SHIM_IOCTL_DIBD BIT(9)
75
76#define SDW_SHIM_CTMCTL_DACTQE BIT(0)
77#define SDW_SHIM_CTMCTL_DODS BIT(1)
78#define SDW_SHIM_CTMCTL_DOAIS GENMASK(4, 3)
79
80#define SDW_SHIM_WAKEEN_ENABLE BIT(0)
81#define SDW_SHIM_WAKESTS_STATUS BIT(0)
82
83/* Intel ALH Register definitions */
84#define SDW_ALH_STRMZCFG(x) (0x000 + (0x4 * x))
85
86#define SDW_ALH_STRMZCFG_DMAT_VAL 0x3
87#define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0)
88#define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16)
89
c46302ec
VK		 90enum intel_pdi_type {
91 INTEL_PDI_IN = 0,
92 INTEL_PDI_OUT = 1,
93 INTEL_PDI_BD = 2,
94};
95
71bb8a1b
VK		 96struct sdw_intel {
97 struct sdw_cdns cdns;
98 int instance;
99 struct sdw_intel_link_res *res;
100};
101
102#define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns)
103
104/*
105 * Read, write helpers for HW registers
106 */
107static inline int intel_readl(void __iomem *base, int offset)
108{
109 return readl(base + offset);
110}
111
112static inline void intel_writel(void __iomem *base, int offset, int value)
113{
114 writel(value, base + offset);
115}
116
117static inline u16 intel_readw(void __iomem *base, int offset)
118{
119 return readw(base + offset);
120}
121
122static inline void intel_writew(void __iomem *base, int offset, u16 value)
123{
124 writew(value, base + offset);
125}
126
127static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
128{
129 int timeout = 10;
130 u32 reg_read;
131
132 writel(value, base + offset);
133 do {
134 reg_read = readl(base + offset);
135 if (!(reg_read & mask))
136 return 0;
137
138 timeout--;
139 udelay(50);
140 } while (timeout != 0);
141
142 return -EAGAIN;
143}
144
145static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
146{
147 int timeout = 10;
148 u32 reg_read;
149
150 writel(value, base + offset);
151 do {
152 reg_read = readl(base + offset);
153 if (reg_read & mask)
154 return 0;
155
156 timeout--;
157 udelay(50);
158 } while (timeout != 0);
159
160 return -EAGAIN;
161}
162
163/*
164 * shim ops
165 */
166
167static int intel_link_power_up(struct sdw_intel *sdw)
168{
169 unsigned int link_id = sdw->instance;
170 void __iomem *shim = sdw->res->shim;
171 int spa_mask, cpa_mask;
172 int link_control, ret;
173
174 /* Link power up sequence */
175 link_control = intel_readl(shim, SDW_SHIM_LCTL);
176 spa_mask = (SDW_SHIM_LCTL_SPA << link_id);
177 cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
178 link_control |= spa_mask;
179
180 ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
181 if (ret < 0)
182 return ret;
183
184 sdw->cdns.link_up = true;
185 return 0;
186}
187
188static int intel_shim_init(struct sdw_intel *sdw)
189{
190 void __iomem *shim = sdw->res->shim;
191 unsigned int link_id = sdw->instance;
192 int sync_reg, ret;
193 u16 ioctl = 0, act = 0;
194
195 /* Initialize Shim */
196 ioctl |= SDW_SHIM_IOCTL_BKE;
197 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
198
199 ioctl |= SDW_SHIM_IOCTL_WPDD;
200 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
201
202 ioctl |= SDW_SHIM_IOCTL_DO;
203 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
204
205 ioctl |= SDW_SHIM_IOCTL_DOE;
206 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
207
208 /* Switch to MIP from Glue logic */
209 ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
210
211 ioctl &= ~(SDW_SHIM_IOCTL_DOE);
212 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
213
214 ioctl &= ~(SDW_SHIM_IOCTL_DO);
215 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
216
217 ioctl |= (SDW_SHIM_IOCTL_MIF);
218 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
219
220 ioctl &= ~(SDW_SHIM_IOCTL_BKE);
221 ioctl &= ~(SDW_SHIM_IOCTL_COE);
222
223 intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
224
225 act |= 0x1 << SDW_REG_SHIFT(SDW_SHIM_CTMCTL_DOAIS);
226 act |= SDW_SHIM_CTMCTL_DACTQE;
227 act |= SDW_SHIM_CTMCTL_DODS;
228 intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
229
230 /* Now set SyncPRD period */
231 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
232 sync_reg |= (SDW_SHIM_SYNC_SYNCPRD_VAL <<
233 SDW_REG_SHIFT(SDW_SHIM_SYNC_SYNCPRD));
234
235 /* Set SyncCPU bit */
236 sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
237 ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
238 SDW_SHIM_SYNC_SYNCCPU);
239 if (ret < 0)
240 dev_err(sdw->cdns.dev, "Failed to set sync period: %d", ret);
241
242 return ret;
243}
244
37a2d22b
VK		 245/*
246 * PDI routines
247 */
248static void intel_pdi_init(struct sdw_intel *sdw,
249 struct sdw_cdns_stream_config *config)
250{
251 void __iomem *shim = sdw->res->shim;
252 unsigned int link_id = sdw->instance;
253 int pcm_cap, pdm_cap;
254
255 /* PCM Stream Capability */
256 pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
257
258 config->pcm_bd = (pcm_cap & SDW_SHIM_PCMSCAP_BSS) >>
259 SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_BSS);
260 config->pcm_in = (pcm_cap & SDW_SHIM_PCMSCAP_ISS) >>
261 SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_ISS);
262 config->pcm_out = (pcm_cap & SDW_SHIM_PCMSCAP_OSS) >>
263 SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_OSS);
264
265 /* PDM Stream Capability */
266 pdm_cap = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
267
268 config->pdm_bd = (pdm_cap & SDW_SHIM_PDMSCAP_BSS) >>
269 SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_BSS);
270 config->pdm_in = (pdm_cap & SDW_SHIM_PDMSCAP_ISS) >>
271 SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_ISS);
272 config->pdm_out = (pdm_cap & SDW_SHIM_PDMSCAP_OSS) >>
273 SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_OSS);
274}
275
276static int
277intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm)
278{
279 void __iomem *shim = sdw->res->shim;
280 unsigned int link_id = sdw->instance;
281 int count;
282
283 if (pcm) {
284 count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
285 } else {
286 count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
287 count = ((count & SDW_SHIM_PDMSCAP_CPSS) >>
288 SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_CPSS));
289 }
290
291 /* zero based values for channel count in register */
292 count++;
293
294 return count;
295}
296
297static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
298 struct sdw_cdns_pdi *pdi,
299 unsigned int num_pdi,
300 unsigned int *num_ch, bool pcm)
301{
302 int i, ch_count = 0;
303
304 for (i = 0; i < num_pdi; i++) {
305 pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num, pcm);
306 ch_count += pdi->ch_count;
307 pdi++;
308 }
309
310 *num_ch = ch_count;
311 return 0;
312}
313
314static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
315 struct sdw_cdns_streams *stream, bool pcm)
316{
317 intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
318 &stream->num_ch_bd, pcm);
319
320 intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
321 &stream->num_ch_in, pcm);
322
323 intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
324 &stream->num_ch_out, pcm);
325
326 return 0;
327}
328
329static int intel_pdi_ch_update(struct sdw_intel *sdw)
330{
331 /* First update PCM streams followed by PDM streams */
332 intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm, true);
333 intel_pdi_stream_ch_update(sdw, &sdw->cdns.pdm, false);
334
335 return 0;
336}
337
338static void
339intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
340{
341 void __iomem *shim = sdw->res->shim;
342 unsigned int link_id = sdw->instance;
343 int pdi_conf = 0;
344
345 pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
346
347 /*
348 * Program stream parameters to stream SHIM register
349 * This is applicable for PCM stream only.
350 */
351 if (pdi->type != SDW_STREAM_PCM)
352 return;
353
354 if (pdi->dir == SDW_DATA_DIR_RX)
355 pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
356 else
357 pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
358
359 pdi_conf |= (pdi->intel_alh_id <<
360 SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_STREAM));
361 pdi_conf |= (pdi->l_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_LCHN));
362 pdi_conf |= (pdi->h_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_HCHN));
363
364 intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
365}
366
367static void
368intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
369{
370 void __iomem *alh = sdw->res->alh;
371 unsigned int link_id = sdw->instance;
372 unsigned int conf;
373
374 pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
375
376 /* Program Stream config ALH register */
377 conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
378
379 conf |= (SDW_ALH_STRMZCFG_DMAT_VAL <<
380 SDW_REG_SHIFT(SDW_ALH_STRMZCFG_DMAT));
381
382 conf |= ((pdi->ch_count - 1) <<
383 SDW_REG_SHIFT(SDW_ALH_STRMZCFG_CHN));
384
385 intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
386}
387
c46302ec
VK		 388static int intel_config_stream(struct sdw_intel *sdw,
389 struct snd_pcm_substream *substream,
390 struct snd_soc_dai *dai,
391 struct snd_pcm_hw_params *hw_params, int link_id)
392{
393 if (sdw->res->ops && sdw->res->ops->config_stream)
394 return sdw->res->ops->config_stream(sdw->res->arg,
395 substream, dai, hw_params, link_id);
396
397 return -EIO;
398}
399
30246e2d
SN		 400/*
401 * bank switch routines
402 */
403
404static int intel_pre_bank_switch(struct sdw_bus *bus)
405{
406 struct sdw_cdns *cdns = bus_to_cdns(bus);
407 struct sdw_intel *sdw = cdns_to_intel(cdns);
408 void __iomem *shim = sdw->res->shim;
409 int sync_reg;
410
411 /* Write to register only for multi-link */
412 if (!bus->multi_link)
413 return 0;
414
415 /* Read SYNC register */
416 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
417 sync_reg |= SDW_SHIM_SYNC_CMDSYNC << sdw->instance;
418 intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
419
420 return 0;
421}
422
423static int intel_post_bank_switch(struct sdw_bus *bus)
424{
425 struct sdw_cdns *cdns = bus_to_cdns(bus);
426 struct sdw_intel *sdw = cdns_to_intel(cdns);
427 void __iomem *shim = sdw->res->shim;
428 int sync_reg, ret;
429
430 /* Write to register only for multi-link */
431 if (!bus->multi_link)
432 return 0;
433
434 /* Read SYNC register */
435 sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
436
437 /*
438 * post_bank_switch() ops is called from the bus in loop for
439 * all the Masters in the steam with the expectation that
440 * we trigger the bankswitch for the only first Master in the list
441 * and do nothing for the other Masters
442 *
443 * So, set the SYNCGO bit only if CMDSYNC bit is set for any Master.
444 */
445 if (!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK))
446 return 0;
447
448 /*
449 * Set SyncGO bit to synchronously trigger a bank switch for
450 * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all
451 * the Masters.
452 */
453 sync_reg |= SDW_SHIM_SYNC_SYNCGO;
454
455 ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
456 SDW_SHIM_SYNC_SYNCGO);
457 if (ret < 0)
458 dev_err(sdw->cdns.dev, "Post bank switch failed: %d", ret);
459
460 return ret;
461}
462
c46302ec
VK		 463/*
464 * DAI routines
465 */
466
467static struct sdw_cdns_port *intel_alloc_port(struct sdw_intel *sdw,
468 u32 ch, u32 dir, bool pcm)
469{
470 struct sdw_cdns *cdns = &sdw->cdns;
471 struct sdw_cdns_port *port = NULL;
472 int i, ret = 0;
473
474 for (i = 0; i < cdns->num_ports; i++) {
475 if (cdns->ports[i].assigned == true)
476 continue;
477
478 port = &cdns->ports[i];
479 port->assigned = true;
480 port->direction = dir;
481 port->ch = ch;
482 break;
483 }
484
485 if (!port) {
486 dev_err(cdns->dev, "Unable to find a free port\n");
487 return NULL;
488 }
489
490 if (pcm) {
491 ret = sdw_cdns_alloc_stream(cdns, &cdns->pcm, port, ch, dir);
492 if (ret)
493 goto out;
494
495 intel_pdi_shim_configure(sdw, port->pdi);
496 sdw_cdns_config_stream(cdns, port, ch, dir, port->pdi);
497
498 intel_pdi_alh_configure(sdw, port->pdi);
499
500 } else {
501 ret = sdw_cdns_alloc_stream(cdns, &cdns->pdm, port, ch, dir);
502 }
503
504out:
505 if (ret) {
506 port->assigned = false;
507 port = NULL;
508 }
509
510 return port;
511}
512
513static void intel_port_cleanup(struct sdw_cdns_dma_data *dma)
514{
515 int i;
516
517 for (i = 0; i < dma->nr_ports; i++) {
518 if (dma->port[i]) {
519 dma->port[i]->pdi->assigned = false;
520 dma->port[i]->pdi = NULL;
521 dma->port[i]->assigned = false;
522 dma->port[i] = NULL;
523 }
524 }
525}
526
527static int intel_hw_params(struct snd_pcm_substream *substream,
528 struct snd_pcm_hw_params *params,
529 struct snd_soc_dai *dai)
530{
531 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
532 struct sdw_intel *sdw = cdns_to_intel(cdns);
533 struct sdw_cdns_dma_data *dma;
534 struct sdw_stream_config sconfig;
535 struct sdw_port_config *pconfig;
536 int ret, i, ch, dir;
537 bool pcm = true;
538
539 dma = snd_soc_dai_get_dma_data(dai, substream);
540 if (!dma)
541 return -EIO;
542
543 ch = params_channels(params);
544 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
545 dir = SDW_DATA_DIR_RX;
546 else
547 dir = SDW_DATA_DIR_TX;
548
549 if (dma->stream_type == SDW_STREAM_PDM) {
550 /* TODO: Check whether PDM decimator is already in use */
551 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pdm, ch, dir);
552 pcm = false;
553 } else {
554 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pcm, ch, dir);
555 }
556
557 if (!dma->nr_ports) {
558 dev_err(dai->dev, "ports/resources not available");
559 return -EINVAL;
560 }
561
562 dma->port = kcalloc(dma->nr_ports, sizeof(*dma->port), GFP_KERNEL);
563 if (!dma->port)
564 return -ENOMEM;
565
566 for (i = 0; i < dma->nr_ports; i++) {
567 dma->port[i] = intel_alloc_port(sdw, ch, dir, pcm);
568 if (!dma->port[i]) {
569 ret = -EINVAL;
570 goto port_error;
571 }
572 }
573
574 /* Inform DSP about PDI stream number */
575 for (i = 0; i < dma->nr_ports; i++) {
576 ret = intel_config_stream(sdw, substream, dai, params,
577 dma->port[i]->pdi->intel_alh_id);
578 if (ret)
579 goto port_error;
580 }
581
582 sconfig.direction = dir;
583 sconfig.ch_count = ch;
584 sconfig.frame_rate = params_rate(params);
585 sconfig.type = dma->stream_type;
586
587 if (dma->stream_type == SDW_STREAM_PDM) {
588 sconfig.frame_rate *= 50;
589 sconfig.bps = 1;
590 } else {
591 sconfig.bps = snd_pcm_format_width(params_format(params));
592 }
593
594 /* Port configuration */
595 pconfig = kcalloc(dma->nr_ports, sizeof(*pconfig), GFP_KERNEL);
596 if (!pconfig) {
597 ret = -ENOMEM;
598 goto port_error;
599 }
600
601 for (i = 0; i < dma->nr_ports; i++) {
602 pconfig[i].num = dma->port[i]->num;
603 pconfig[i].ch_mask = (1 << ch) - 1;
604 }
605
606 ret = sdw_stream_add_master(&cdns->bus, &sconfig,
607 pconfig, dma->nr_ports, dma->stream);
608 if (ret) {
609 dev_err(cdns->dev, "add master to stream failed:%d", ret);
610 goto stream_error;
611 }
612
613 kfree(pconfig);
614 return ret;
615
616stream_error:
617 kfree(pconfig);
618port_error:
619 intel_port_cleanup(dma);
620 kfree(dma->port);
621 return ret;
622}
623
624static int
625intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
626{
627 struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
628 struct sdw_cdns_dma_data *dma;
629 int ret;
630
631 dma = snd_soc_dai_get_dma_data(dai, substream);
632 if (!dma)
633 return -EIO;
634
635 ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
636 if (ret < 0)
637 dev_err(dai->dev, "remove master from stream %s failed: %d",
638 dma->stream->name, ret);
639
640 intel_port_cleanup(dma);
641 kfree(dma->port);
642 return ret;
643}
644
645static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
646 void *stream, int direction)
647{
648 return cdns_set_sdw_stream(dai, stream, true, direction);
649}
650
651static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai,
652 void *stream, int direction)
653{
654 return cdns_set_sdw_stream(dai, stream, false, direction);
655}
656
657static struct snd_soc_dai_ops intel_pcm_dai_ops = {
658 .hw_params = intel_hw_params,
659 .hw_free = intel_hw_free,
660 .shutdown = sdw_cdns_shutdown,
661 .set_sdw_stream = intel_pcm_set_sdw_stream,
662};
663
664static struct snd_soc_dai_ops intel_pdm_dai_ops = {
665 .hw_params = intel_hw_params,
666 .hw_free = intel_hw_free,
667 .shutdown = sdw_cdns_shutdown,
668 .set_sdw_stream = intel_pdm_set_sdw_stream,
669};
670
671static const struct snd_soc_component_driver dai_component = {
672 .name = "soundwire",
673};
674
675static int intel_create_dai(struct sdw_cdns *cdns,
676 struct snd_soc_dai_driver *dais,
677 enum intel_pdi_type type,
678 u32 num, u32 off, u32 max_ch, bool pcm)
679{
680 int i;
681
682 if (num == 0)
683 return 0;
684
685 /* TODO: Read supported rates/formats from hardware */
686 for (i = off; i < (off + num); i++) {
687 dais[i].name = kasprintf(GFP_KERNEL, "SDW%d Pin%d",
688 cdns->instance, i);
689 if (!dais[i].name)
690 return -ENOMEM;
691
692 if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
693 dais[i].playback.stream_name = kasprintf(GFP_KERNEL,
694 "SDW%d Tx%d",
695 cdns->instance, i);
696 if (!dais[i].playback.stream_name) {
697 kfree(dais[i].name);
698 return -ENOMEM;
699 }
700
701 dais[i].playback.channels_min = 1;
702 dais[i].playback.channels_max = max_ch;
703 dais[i].playback.rates = SNDRV_PCM_RATE_48000;
704 dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
705 }
706
707 if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
708 dais[i].capture.stream_name = kasprintf(GFP_KERNEL,
709 "SDW%d Rx%d",
710 cdns->instance, i);
711 if (!dais[i].capture.stream_name) {
712 kfree(dais[i].name);
713 kfree(dais[i].playback.stream_name);
714 return -ENOMEM;
715 }
716
717 dais[i].playback.channels_min = 1;
718 dais[i].playback.channels_max = max_ch;
719 dais[i].capture.rates = SNDRV_PCM_RATE_48000;
720 dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
721 }
722
723 dais[i].id = SDW_DAI_ID_RANGE_START + i;
724
725 if (pcm)
726 dais[i].ops = &intel_pcm_dai_ops;
727 else
728 dais[i].ops = &intel_pdm_dai_ops;
729 }
730
731 return 0;
732}
733
734static int intel_register_dai(struct sdw_intel *sdw)
735{
736 struct sdw_cdns *cdns = &sdw->cdns;
737 struct sdw_cdns_streams *stream;
738 struct snd_soc_dai_driver *dais;
739 int num_dai, ret, off = 0;
740
741 /* DAIs are created based on total number of PDIs supported */
742 num_dai = cdns->pcm.num_pdi + cdns->pdm.num_pdi;
743
744 dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
745 if (!dais)
746 return -ENOMEM;
747
748 /* Create PCM DAIs */
749 stream = &cdns->pcm;
750
751 ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
752 stream->num_in, off, stream->num_ch_in, true);
753 if (ret)
754 return ret;
755
756 off += cdns->pcm.num_in;
757 ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
758 cdns->pcm.num_out, off, stream->num_ch_out, true);
759 if (ret)
760 return ret;
761
762 off += cdns->pcm.num_out;
763 ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
764 cdns->pcm.num_bd, off, stream->num_ch_bd, true);
765 if (ret)
766 return ret;
767
768 /* Create PDM DAIs */
769 stream = &cdns->pdm;
770 off += cdns->pcm.num_bd;
771 ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
772 cdns->pdm.num_in, off, stream->num_ch_in, false);
773 if (ret)
774 return ret;
775
776 off += cdns->pdm.num_in;
777 ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
778 cdns->pdm.num_out, off, stream->num_ch_out, false);
779 if (ret)
780 return ret;
781
782 off += cdns->pdm.num_bd;
783 ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
784 cdns->pdm.num_bd, off, stream->num_ch_bd, false);
785 if (ret)
786 return ret;
787
788 return snd_soc_register_component(cdns->dev, &dai_component,
789 dais, num_dai);
790}
791
71bb8a1b
VK		 792static int intel_prop_read(struct sdw_bus *bus)
793{
794 /* Initialize with default handler to read all DisCo properties */
795 sdw_master_read_prop(bus);
796
797 /* BIOS is not giving some values correctly. So, lets override them */
798 bus->prop.num_freq = 1;
799 bus->prop.freq = devm_kcalloc(bus->dev, sizeof(*bus->prop.freq),
800 bus->prop.num_freq, GFP_KERNEL);
801 if (!bus->prop.freq)
802 return -ENOMEM;
803
804 bus->prop.freq[0] = bus->prop.max_freq;
805 bus->prop.err_threshold = 5;
806
807 return 0;
808}
809
c91605f4
SN		 810static struct sdw_master_ops sdw_intel_ops = {
811 .read_prop = sdw_master_read_prop,
812 .xfer_msg = cdns_xfer_msg,
813 .xfer_msg_defer = cdns_xfer_msg_defer,
814 .reset_page_addr = cdns_reset_page_addr,
07abeff1 815 .set_bus_conf = cdns_bus_conf,
30246e2d
SN		 816 .pre_bank_switch = intel_pre_bank_switch,
817 .post_bank_switch = intel_post_bank_switch,
c91605f4
SN		 818};
819
71bb8a1b
VK		 820/*
821 * probe and init
822 */
823static int intel_probe(struct platform_device *pdev)
824{
37a2d22b 825 struct sdw_cdns_stream_config config;
71bb8a1b
VK		 826 struct sdw_intel *sdw;
827 int ret;
828
829 sdw = devm_kzalloc(&pdev->dev, sizeof(*sdw), GFP_KERNEL);
830 if (!sdw)
831 return -ENOMEM;
832
833 sdw->instance = pdev->id;
834 sdw->res = dev_get_platdata(&pdev->dev);
835 sdw->cdns.dev = &pdev->dev;
836 sdw->cdns.registers = sdw->res->registers;
837 sdw->cdns.instance = sdw->instance;
838 sdw->cdns.msg_count = 0;
839 sdw->cdns.bus.dev = &pdev->dev;
840 sdw->cdns.bus.link_id = pdev->id;
841
842 sdw_cdns_probe(&sdw->cdns);
843
844 /* Set property read ops */
c91605f4
SN		 845 sdw_intel_ops.read_prop = intel_prop_read;
846 sdw->cdns.bus.ops = &sdw_intel_ops;
71bb8a1b
VK		 847
848 platform_set_drvdata(pdev, sdw);
849
850 ret = sdw_add_bus_master(&sdw->cdns.bus);
851 if (ret) {
852 dev_err(&pdev->dev, "sdw_add_bus_master fail: %d\n", ret);
853 goto err_master_reg;
854 }
855
856 /* Initialize shim and controller */
857 intel_link_power_up(sdw);
858 intel_shim_init(sdw);
859
860 ret = sdw_cdns_init(&sdw->cdns);
861 if (ret)
862 goto err_init;
863
7094dc2b 864 ret = sdw_cdns_enable_interrupt(&sdw->cdns);
37a2d22b
VK		 865
866 /* Read the PDI config and initialize cadence PDI */
867 intel_pdi_init(sdw, &config);
868 ret = sdw_cdns_pdi_init(&sdw->cdns, config);
71bb8a1b
VK		 869 if (ret)
870 goto err_init;
871
37a2d22b
VK		 872 intel_pdi_ch_update(sdw);
873
71bb8a1b
VK		 874 /* Acquire IRQ */
875 ret = request_threaded_irq(sdw->res->irq, sdw_cdns_irq,
876 sdw_cdns_thread, IRQF_SHARED, KBUILD_MODNAME,
877 &sdw->cdns);
878 if (ret < 0) {
879 dev_err(sdw->cdns.dev, "unable to grab IRQ %d, disabling device\n",
880 sdw->res->irq);
881 goto err_init;
882 }
883
c46302ec
VK		 884 /* Register DAIs */
885 ret = intel_register_dai(sdw);
886 if (ret) {
887 dev_err(sdw->cdns.dev, "DAI registration failed: %d", ret);
888 snd_soc_unregister_component(sdw->cdns.dev);
889 goto err_dai;
890 }
891
71bb8a1b
VK		 892 return 0;
893
c46302ec
VK		 894err_dai:
895 free_irq(sdw->res->irq, sdw);
71bb8a1b
VK		 896err_init:
897 sdw_delete_bus_master(&sdw->cdns.bus);
898err_master_reg:
899 return ret;
900}
901
902static int intel_remove(struct platform_device *pdev)
903{
904 struct sdw_intel *sdw;
905
906 sdw = platform_get_drvdata(pdev);
907
908 free_irq(sdw->res->irq, sdw);
c46302ec 909 snd_soc_unregister_component(sdw->cdns.dev);
71bb8a1b
VK		 910 sdw_delete_bus_master(&sdw->cdns.bus);
911
912 return 0;
913}
914
915static struct platform_driver sdw_intel_drv = {
916 .probe = intel_probe,
917 .remove = intel_remove,
918 .driver = {
919 .name = "int-sdw",
920
921 },
922};
923
924module_platform_driver(sdw_intel_drv);
925
926MODULE_LICENSE("Dual BSD/GPL");
927MODULE_ALIAS("platform:int-sdw");
928MODULE_DESCRIPTION("Intel Soundwire Master Driver");
Linux 6.x block layer and io_uring tree(s)