2 * Copyright (C) STMicroelectronics SA 2015
3 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
4 * for STMicroelectronics.
5 * License terms: GNU General Public License (GPL), version 2
9 #include <linux/delay.h>
11 #include <linux/mfd/syscon.h>
13 #include <sound/asoundef.h>
14 #include <sound/soc.h>
19 * Some hardware-related definitions
22 /* sys config registers definitions */
23 #define SYS_CFG_AUDIO_GLUE 0xA4
24 #define SYS_CFG_AUDI0_GLUE_PCM_CLKX 8
27 * Driver specific types.
29 #define UNIPERIF_PLAYER_TYPE_IS_HDMI(p) \
30 ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_HDMI)
31 #define UNIPERIF_PLAYER_TYPE_IS_PCM(p) \
32 ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_PCM)
33 #define UNIPERIF_PLAYER_TYPE_IS_SPDIF(p) \
34 ((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF)
35 #define UNIPERIF_PLAYER_TYPE_IS_IEC958(p) \
36 (UNIPERIF_PLAYER_TYPE_IS_HDMI(p) || \
37 UNIPERIF_PLAYER_TYPE_IS_SPDIF(p))
39 #define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999
40 #define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000
43 * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
44 * integrate DAI_CPU capability in term of rate and supported channels
46 static const struct snd_pcm_hardware uni_player_pcm_hw
= {
47 .info
= SNDRV_PCM_INFO_INTERLEAVED
| SNDRV_PCM_INFO_BLOCK_TRANSFER
|
48 SNDRV_PCM_INFO_PAUSE
| SNDRV_PCM_INFO_MMAP
|
49 SNDRV_PCM_INFO_MMAP_VALID
,
50 .formats
= SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S16_LE
,
52 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
62 .period_bytes_min
= 128,
63 .period_bytes_max
= 64 * PAGE_SIZE
,
64 .buffer_bytes_max
= 256 * PAGE_SIZE
67 static inline int reset_player(struct uniperif
*player
)
71 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
) {
72 while (GET_UNIPERIF_SOFT_RST_SOFT_RST(player
) && count
) {
79 dev_err(player
->dev
, "Failed to reset uniperif");
87 * uni_player_irq_handler
88 * In case of error audio stream is stopped; stop action is protected via PCM
89 * stream lock to avoid race condition with trigger callback.
91 static irqreturn_t
uni_player_irq_handler(int irq
, void *dev_id
)
93 irqreturn_t ret
= IRQ_NONE
;
94 struct uniperif
*player
= dev_id
;
98 if (player
->state
== UNIPERIF_STATE_STOPPED
) {
99 /* Unexpected IRQ: do nothing */
103 /* Get interrupt status & clear them immediately */
104 status
= GET_UNIPERIF_ITS(player
);
105 SET_UNIPERIF_ITS_BCLR(player
, status
);
107 /* Check for fifo error (underrun) */
108 if (unlikely(status
& UNIPERIF_ITS_FIFO_ERROR_MASK(player
))) {
109 dev_err(player
->dev
, "FIFO underflow error detected");
111 /* Interrupt is just for information when underflow recovery */
112 if (player
->info
->underflow_enabled
) {
113 /* Update state to underflow */
114 player
->state
= UNIPERIF_STATE_UNDERFLOW
;
117 /* Disable interrupt so doesn't continually fire */
118 SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player
);
120 /* Stop the player */
121 snd_pcm_stream_lock(player
->substream
);
122 snd_pcm_stop(player
->substream
, SNDRV_PCM_STATE_XRUN
);
123 snd_pcm_stream_unlock(player
->substream
);
129 /* Check for dma error (overrun) */
130 if (unlikely(status
& UNIPERIF_ITS_DMA_ERROR_MASK(player
))) {
131 dev_err(player
->dev
, "DMA error detected");
133 /* Disable interrupt so doesn't continually fire */
134 SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player
);
136 /* Stop the player */
137 snd_pcm_stream_lock(player
->substream
);
138 snd_pcm_stop(player
->substream
, SNDRV_PCM_STATE_XRUN
);
139 snd_pcm_stream_unlock(player
->substream
);
144 /* Check for underflow recovery done */
145 if (unlikely(status
& UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player
))) {
146 if (!player
->info
->underflow_enabled
) {
147 dev_err(player
->dev
, "unexpected Underflow recovering");
150 /* Read the underflow recovery duration */
151 tmp
= GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player
);
153 /* Clear the underflow recovery duration */
154 SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player
);
156 /* Update state to started */
157 player
->state
= UNIPERIF_STATE_STARTED
;
162 /* Check if underflow recovery failed */
163 if (unlikely(status
&
164 UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player
))) {
165 dev_err(player
->dev
, "Underflow recovery failed");
167 /* Stop the player */
168 snd_pcm_stream_lock(player
->substream
);
169 snd_pcm_stop(player
->substream
, SNDRV_PCM_STATE_XRUN
);
170 snd_pcm_stream_unlock(player
->substream
);
178 static int uni_player_clk_set_rate(struct uniperif
*player
, unsigned long rate
)
180 int rate_adjusted
, rate_achieved
, delta
, ret
;
181 int adjustment
= player
->clk_adj
;
185 * F = f + --------- * f = f + d
194 * a - adjustment in ppm (parts per milion)
195 * F - rate to be set in synthesizer
196 * d - delta (difference) between f and F
198 if (adjustment
< 0) {
199 /* div64_64 operates on unsigned values... */
201 adjustment
= -adjustment
;
205 /* 500000 ppm is 0.5, which is used to round up values */
206 delta
*= (int)div64_u64((uint64_t)rate
*
207 (uint64_t)adjustment
+ 500000, 1000000);
208 rate_adjusted
= rate
+ delta
;
210 /* Adjusted rate should never be == 0 */
214 ret
= clk_set_rate(player
->clk
, rate_adjusted
);
218 rate_achieved
= clk_get_rate(player
->clk
);
220 /* If value is 0 means that clock or parent not valid */
224 * Using ALSA's adjustment control, we can modify the rate to be up
225 * to twice as much as requested, but no more
227 delta
= rate_achieved
- rate
;
229 /* div64_64 operates on unsigned values... */
235 /* Frequency/2 is added to round up result */
236 adjustment
*= (int)div64_u64((uint64_t)delta
* 1000000 + rate
/ 2,
238 player
->clk_adj
= adjustment
;
242 static void uni_player_set_channel_status(struct uniperif
*player
,
243 struct snd_pcm_runtime
*runtime
)
249 * Some AVRs and TVs require the channel status to contain a correct
250 * sampling frequency. If no sample rate is already specified, then
253 mutex_lock(&player
->ctrl_lock
);
254 if (runtime
&& (player
->stream_settings
.iec958
.status
[3]
255 == IEC958_AES3_CON_FS_NOTID
)) {
256 switch (runtime
->rate
) {
258 player
->stream_settings
.iec958
.status
[3] =
259 IEC958_AES3_CON_FS_22050
;
262 player
->stream_settings
.iec958
.status
[3] =
263 IEC958_AES3_CON_FS_44100
;
266 player
->stream_settings
.iec958
.status
[3] =
267 IEC958_AES3_CON_FS_88200
;
270 player
->stream_settings
.iec958
.status
[3] =
271 IEC958_AES3_CON_FS_176400
;
274 player
->stream_settings
.iec958
.status
[3] =
275 IEC958_AES3_CON_FS_24000
;
278 player
->stream_settings
.iec958
.status
[3] =
279 IEC958_AES3_CON_FS_48000
;
282 player
->stream_settings
.iec958
.status
[3] =
283 IEC958_AES3_CON_FS_96000
;
286 player
->stream_settings
.iec958
.status
[3] =
287 IEC958_AES3_CON_FS_192000
;
290 player
->stream_settings
.iec958
.status
[3] =
291 IEC958_AES3_CON_FS_32000
;
294 /* Mark as sampling frequency not indicated */
295 player
->stream_settings
.iec958
.status
[3] =
296 IEC958_AES3_CON_FS_NOTID
;
302 * Use audio mode status to select PCM or encoded mode
304 if (player
->stream_settings
.iec958
.status
[0] & IEC958_AES0_NONAUDIO
)
305 player
->stream_settings
.encoding_mode
=
306 UNIPERIF_IEC958_ENCODING_MODE_ENCODED
;
308 player
->stream_settings
.encoding_mode
=
309 UNIPERIF_IEC958_ENCODING_MODE_PCM
;
311 if (player
->stream_settings
.encoding_mode
==
312 UNIPERIF_IEC958_ENCODING_MODE_PCM
)
313 /* Clear user validity bits */
314 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player
, 0);
316 /* Set user validity bits */
317 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player
, 1);
319 /* Program the new channel status */
320 for (n
= 0; n
< 6; ++n
) {
322 player
->stream_settings
.iec958
.status
[0 + (n
* 4)] & 0xf;
324 player
->stream_settings
.iec958
.status
[1 + (n
* 4)] << 8;
326 player
->stream_settings
.iec958
.status
[2 + (n
* 4)] << 16;
328 player
->stream_settings
.iec958
.status
[3 + (n
* 4)] << 24;
329 SET_UNIPERIF_CHANNEL_STA_REGN(player
, n
, status
);
331 mutex_unlock(&player
->ctrl_lock
);
333 /* Update the channel status */
334 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
)
335 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player
);
337 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player
);
340 static int uni_player_prepare_iec958(struct uniperif
*player
,
341 struct snd_pcm_runtime
*runtime
)
345 clk_div
= player
->mclk
/ runtime
->rate
;
347 /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
348 if ((clk_div
% 128) || (clk_div
<= 0)) {
349 dev_err(player
->dev
, "%s: invalid clk_div %d",
354 switch (runtime
->format
) {
355 case SNDRV_PCM_FORMAT_S16_LE
:
356 /* 16/16 memory format */
357 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player
);
358 /* 16-bits per sub-frame */
359 SET_UNIPERIF_I2S_FMT_NBIT_32(player
);
360 /* Set 16-bit sample precision */
361 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player
);
363 case SNDRV_PCM_FORMAT_S32_LE
:
364 /* 16/0 memory format */
365 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player
);
366 /* 32-bits per sub-frame */
367 SET_UNIPERIF_I2S_FMT_NBIT_32(player
);
368 /* Set 24-bit sample precision */
369 SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player
);
372 dev_err(player
->dev
, "format not supported");
376 /* Set parity to be calculated by the hardware */
377 SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player
);
379 /* Set channel status bits to be inserted by the hardware */
380 SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player
);
382 /* Set user data bits to be inserted by the hardware */
383 SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player
);
385 /* Set validity bits to be inserted by the hardware */
386 SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player
);
388 /* Set full software control to disabled */
389 SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player
);
391 SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player
);
393 /* Update the channel status */
394 uni_player_set_channel_status(player
, runtime
);
396 /* Clear the user validity user bits */
397 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player
, 0);
399 /* Disable one-bit audio mode */
400 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player
);
402 /* Enable consecutive frames repetition of Z preamble (not for HBRA) */
403 SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player
);
405 /* Change to SUF0_SUBF1 and left/right channels swap! */
406 SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player
);
408 /* Set data output as MSB first */
409 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player
);
411 if (player
->stream_settings
.encoding_mode
==
412 UNIPERIF_IEC958_ENCODING_MODE_ENCODED
)
413 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player
);
415 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player
);
417 SET_UNIPERIF_I2S_FMT_NUM_CH(player
, runtime
->channels
/ 2);
419 /* Set rounding to off */
420 SET_UNIPERIF_CTRL_ROUNDING_OFF(player
);
422 /* Set clock divisor */
423 SET_UNIPERIF_CTRL_DIVIDER(player
, clk_div
/ 128);
425 /* Set the spdif latency to not wait before starting player */
426 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player
);
429 * Ensure iec958 formatting is off. It will be enabled in function
430 * uni_player_start() at the same time as the operation
431 * mode is set to work around a silicon issue.
433 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
)
434 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player
);
436 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player
);
441 static int uni_player_prepare_pcm(struct uniperif
*player
,
442 struct snd_pcm_runtime
*runtime
)
444 int output_frame_size
, slot_width
, clk_div
;
446 /* Force slot width to 32 in I2S mode (HW constraint) */
447 if ((player
->daifmt
& SND_SOC_DAIFMT_FORMAT_MASK
) ==
448 SND_SOC_DAIFMT_I2S
) {
451 switch (runtime
->format
) {
452 case SNDRV_PCM_FORMAT_S16_LE
:
460 output_frame_size
= slot_width
* runtime
->channels
;
462 clk_div
= player
->mclk
/ runtime
->rate
;
464 * For 32 bits subframe clk_div must be a multiple of 128,
465 * for 16 bits must be a multiple of 64
467 if ((slot_width
== 32) && (clk_div
% 128)) {
468 dev_err(player
->dev
, "%s: invalid clk_div", __func__
);
472 if ((slot_width
== 16) && (clk_div
% 64)) {
473 dev_err(player
->dev
, "%s: invalid clk_div", __func__
);
478 * Number of bits per subframe (which is one channel sample)
479 * on output - Transfer 16 or 32 bits from FIFO
481 switch (slot_width
) {
483 SET_UNIPERIF_I2S_FMT_NBIT_32(player
);
484 SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player
);
487 SET_UNIPERIF_I2S_FMT_NBIT_16(player
);
488 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player
);
491 dev_err(player
->dev
, "subframe format not supported");
495 /* Configure data memory format */
496 switch (runtime
->format
) {
497 case SNDRV_PCM_FORMAT_S16_LE
:
498 /* One data word contains two samples */
499 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player
);
502 case SNDRV_PCM_FORMAT_S32_LE
:
504 * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
505 * on the left than zeros (if less than 32 bytes)"... ;-)
507 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player
);
511 dev_err(player
->dev
, "format not supported");
515 /* Set rounding to off */
516 SET_UNIPERIF_CTRL_ROUNDING_OFF(player
);
518 /* Set clock divisor */
519 SET_UNIPERIF_CTRL_DIVIDER(player
, clk_div
/ (2 * output_frame_size
));
521 /* Number of channelsmust be even*/
522 if ((runtime
->channels
% 2) || (runtime
->channels
< 2) ||
523 (runtime
->channels
> 10)) {
524 dev_err(player
->dev
, "%s: invalid nb of channels", __func__
);
528 SET_UNIPERIF_I2S_FMT_NUM_CH(player
, runtime
->channels
/ 2);
530 /* Set 1-bit audio format to disabled */
531 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player
);
533 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player
);
534 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player
);
536 /* No iec958 formatting as outputting to DAC */
537 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player
);
543 * ALSA uniperipheral iec958 controls
545 static int uni_player_ctl_iec958_info(struct snd_kcontrol
*kcontrol
,
546 struct snd_ctl_elem_info
*uinfo
)
548 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_IEC958
;
554 static int uni_player_ctl_iec958_get(struct snd_kcontrol
*kcontrol
,
555 struct snd_ctl_elem_value
*ucontrol
)
557 struct snd_soc_dai
*dai
= snd_kcontrol_chip(kcontrol
);
558 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
559 struct uniperif
*player
= priv
->dai_data
.uni
;
560 struct snd_aes_iec958
*iec958
= &player
->stream_settings
.iec958
;
562 mutex_lock(&player
->ctrl_lock
);
563 ucontrol
->value
.iec958
.status
[0] = iec958
->status
[0];
564 ucontrol
->value
.iec958
.status
[1] = iec958
->status
[1];
565 ucontrol
->value
.iec958
.status
[2] = iec958
->status
[2];
566 ucontrol
->value
.iec958
.status
[3] = iec958
->status
[3];
567 mutex_unlock(&player
->ctrl_lock
);
571 static int uni_player_ctl_iec958_put(struct snd_kcontrol
*kcontrol
,
572 struct snd_ctl_elem_value
*ucontrol
)
574 struct snd_soc_dai
*dai
= snd_kcontrol_chip(kcontrol
);
575 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
576 struct uniperif
*player
= priv
->dai_data
.uni
;
577 struct snd_aes_iec958
*iec958
= &player
->stream_settings
.iec958
;
579 mutex_lock(&player
->ctrl_lock
);
580 iec958
->status
[0] = ucontrol
->value
.iec958
.status
[0];
581 iec958
->status
[1] = ucontrol
->value
.iec958
.status
[1];
582 iec958
->status
[2] = ucontrol
->value
.iec958
.status
[2];
583 iec958
->status
[3] = ucontrol
->value
.iec958
.status
[3];
584 mutex_unlock(&player
->ctrl_lock
);
586 uni_player_set_channel_status(player
, NULL
);
591 static struct snd_kcontrol_new uni_player_iec958_ctl
= {
592 .iface
= SNDRV_CTL_ELEM_IFACE_PCM
,
593 .name
= SNDRV_CTL_NAME_IEC958("", PLAYBACK
, DEFAULT
),
594 .info
= uni_player_ctl_iec958_info
,
595 .get
= uni_player_ctl_iec958_get
,
596 .put
= uni_player_ctl_iec958_put
,
600 * uniperif rate adjustement control
602 static int snd_sti_clk_adjustment_info(struct snd_kcontrol
*kcontrol
,
603 struct snd_ctl_elem_info
*uinfo
)
605 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_INTEGER
;
607 uinfo
->value
.integer
.min
= UNIPERIF_PLAYER_CLK_ADJ_MIN
;
608 uinfo
->value
.integer
.max
= UNIPERIF_PLAYER_CLK_ADJ_MAX
;
609 uinfo
->value
.integer
.step
= 1;
614 static int snd_sti_clk_adjustment_get(struct snd_kcontrol
*kcontrol
,
615 struct snd_ctl_elem_value
*ucontrol
)
617 struct snd_soc_dai
*dai
= snd_kcontrol_chip(kcontrol
);
618 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
619 struct uniperif
*player
= priv
->dai_data
.uni
;
621 mutex_lock(&player
->ctrl_lock
);
622 ucontrol
->value
.integer
.value
[0] = player
->clk_adj
;
623 mutex_unlock(&player
->ctrl_lock
);
628 static int snd_sti_clk_adjustment_put(struct snd_kcontrol
*kcontrol
,
629 struct snd_ctl_elem_value
*ucontrol
)
631 struct snd_soc_dai
*dai
= snd_kcontrol_chip(kcontrol
);
632 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
633 struct uniperif
*player
= priv
->dai_data
.uni
;
636 if ((ucontrol
->value
.integer
.value
[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN
) ||
637 (ucontrol
->value
.integer
.value
[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX
))
640 mutex_lock(&player
->ctrl_lock
);
641 player
->clk_adj
= ucontrol
->value
.integer
.value
[0];
644 ret
= uni_player_clk_set_rate(player
, player
->mclk
);
645 mutex_unlock(&player
->ctrl_lock
);
650 static struct snd_kcontrol_new uni_player_clk_adj_ctl
= {
651 .iface
= SNDRV_CTL_ELEM_IFACE_PCM
,
652 .name
= "PCM Playback Oversampling Freq. Adjustment",
653 .info
= snd_sti_clk_adjustment_info
,
654 .get
= snd_sti_clk_adjustment_get
,
655 .put
= snd_sti_clk_adjustment_put
,
658 static struct snd_kcontrol_new
*snd_sti_pcm_ctl
[] = {
659 &uni_player_clk_adj_ctl
,
662 static struct snd_kcontrol_new
*snd_sti_iec_ctl
[] = {
663 &uni_player_iec958_ctl
,
664 &uni_player_clk_adj_ctl
,
667 static int uni_player_startup(struct snd_pcm_substream
*substream
,
668 struct snd_soc_dai
*dai
)
670 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
671 struct uniperif
*player
= priv
->dai_data
.uni
;
672 player
->substream
= substream
;
679 static int uni_player_set_sysclk(struct snd_soc_dai
*dai
, int clk_id
,
680 unsigned int freq
, int dir
)
682 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
683 struct uniperif
*player
= priv
->dai_data
.uni
;
686 if (dir
== SND_SOC_CLOCK_IN
)
692 mutex_lock(&player
->ctrl_lock
);
693 ret
= uni_player_clk_set_rate(player
, freq
);
696 mutex_unlock(&player
->ctrl_lock
);
701 static int uni_player_prepare(struct snd_pcm_substream
*substream
,
702 struct snd_soc_dai
*dai
)
704 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
705 struct uniperif
*player
= priv
->dai_data
.uni
;
706 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
707 int transfer_size
, trigger_limit
;
710 /* The player should be stopped */
711 if (player
->state
!= UNIPERIF_STATE_STOPPED
) {
712 dev_err(player
->dev
, "%s: invalid player state %d", __func__
,
717 /* Calculate transfer size (in fifo cells and bytes) for frame count */
718 transfer_size
= runtime
->channels
* UNIPERIF_FIFO_FRAMES
;
720 /* Calculate number of empty cells available before asserting DREQ */
721 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
) {
722 trigger_limit
= UNIPERIF_FIFO_SIZE
- transfer_size
;
725 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
726 * FDMA_TRIGGER_LIMIT also controls when the state switches
727 * from OFF or STANDBY to AUDIO DATA.
729 trigger_limit
= transfer_size
;
732 /* Trigger limit must be an even number */
733 if ((!trigger_limit
% 2) || (trigger_limit
!= 1 && transfer_size
% 2) ||
734 (trigger_limit
> UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player
))) {
735 dev_err(player
->dev
, "invalid trigger limit %d", trigger_limit
);
739 SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player
, trigger_limit
);
741 /* Uniperipheral setup depends on player type */
742 switch (player
->info
->player_type
) {
743 case SND_ST_UNIPERIF_PLAYER_TYPE_HDMI
:
744 ret
= uni_player_prepare_iec958(player
, runtime
);
746 case SND_ST_UNIPERIF_PLAYER_TYPE_PCM
:
747 ret
= uni_player_prepare_pcm(player
, runtime
);
749 case SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF
:
750 ret
= uni_player_prepare_iec958(player
, runtime
);
753 dev_err(player
->dev
, "invalid player type");
760 switch (player
->daifmt
& SND_SOC_DAIFMT_INV_MASK
) {
761 case SND_SOC_DAIFMT_NB_NF
:
762 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player
);
763 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player
);
765 case SND_SOC_DAIFMT_NB_IF
:
766 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player
);
767 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player
);
769 case SND_SOC_DAIFMT_IB_NF
:
770 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player
);
771 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player
);
773 case SND_SOC_DAIFMT_IB_IF
:
774 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player
);
775 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player
);
779 switch (player
->daifmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
780 case SND_SOC_DAIFMT_I2S
:
781 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player
);
782 SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player
);
784 case SND_SOC_DAIFMT_LEFT_J
:
785 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player
);
786 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player
);
788 case SND_SOC_DAIFMT_RIGHT_J
:
789 SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player
);
790 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player
);
793 dev_err(player
->dev
, "format not supported");
797 SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player
, 0);
799 /* Reset uniperipheral player */
800 SET_UNIPERIF_SOFT_RST_SOFT_RST(player
);
802 return reset_player(player
);
805 static int uni_player_start(struct uniperif
*player
)
809 /* The player should be stopped */
810 if (player
->state
!= UNIPERIF_STATE_STOPPED
) {
811 dev_err(player
->dev
, "%s: invalid player state", __func__
);
815 ret
= clk_prepare_enable(player
->clk
);
817 dev_err(player
->dev
, "%s: Failed to enable clock", __func__
);
821 /* Clear any pending interrupts */
822 SET_UNIPERIF_ITS_BCLR(player
, GET_UNIPERIF_ITS(player
));
824 /* Set the interrupt mask */
825 SET_UNIPERIF_ITM_BSET_DMA_ERROR(player
);
826 SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player
);
828 /* Enable underflow recovery interrupts */
829 if (player
->info
->underflow_enabled
) {
830 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player
);
831 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player
);
834 /* Reset uniperipheral player */
835 SET_UNIPERIF_SOFT_RST_SOFT_RST(player
);
837 ret
= reset_player(player
);
842 * Does not use IEC61937 features of the uniperipheral hardware.
843 * Instead it performs IEC61937 in software and inserts it directly
844 * into the audio data stream. As such, when encoded mode is selected,
845 * linear pcm mode is still used, but with the differences of the
846 * channel status bits set for encoded mode and the validity bits set.
848 SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player
);
851 * If iec958 formatting is required for hdmi or spdif, then it must be
852 * enabled after the operation mode is set. If set prior to this, it
853 * will not take affect and hang the player.
855 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
)
856 if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player
))
857 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player
);
859 /* Force channel status update (no update if clk disable) */
860 if (player
->ver
< SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
)
861 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player
);
863 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player
);
865 /* Update state to started */
866 player
->state
= UNIPERIF_STATE_STARTED
;
871 static int uni_player_stop(struct uniperif
*player
)
875 /* The player should not be in stopped state */
876 if (player
->state
== UNIPERIF_STATE_STOPPED
) {
877 dev_err(player
->dev
, "%s: invalid player state", __func__
);
881 /* Turn the player off */
882 SET_UNIPERIF_CTRL_OPERATION_OFF(player
);
884 /* Soft reset the player */
885 SET_UNIPERIF_SOFT_RST_SOFT_RST(player
);
887 ret
= reset_player(player
);
891 /* Disable interrupts */
892 SET_UNIPERIF_ITM_BCLR(player
, GET_UNIPERIF_ITM(player
));
895 clk_disable_unprepare(player
->clk
);
897 /* Update state to stopped and return */
898 player
->state
= UNIPERIF_STATE_STOPPED
;
903 int uni_player_resume(struct uniperif
*player
)
907 /* Select the frequency synthesizer clock */
908 if (player
->clk_sel
) {
909 ret
= regmap_field_write(player
->clk_sel
, 1);
912 "%s: Failed to select freq synth clock",
918 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player
);
919 SET_UNIPERIF_CTRL_ROUNDING_OFF(player
);
920 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player
);
921 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player
);
925 EXPORT_SYMBOL_GPL(uni_player_resume
);
927 static int uni_player_trigger(struct snd_pcm_substream
*substream
,
928 int cmd
, struct snd_soc_dai
*dai
)
930 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
931 struct uniperif
*player
= priv
->dai_data
.uni
;
934 case SNDRV_PCM_TRIGGER_START
:
935 return uni_player_start(player
);
936 case SNDRV_PCM_TRIGGER_STOP
:
937 return uni_player_stop(player
);
938 case SNDRV_PCM_TRIGGER_RESUME
:
939 return uni_player_resume(player
);
945 static void uni_player_shutdown(struct snd_pcm_substream
*substream
,
946 struct snd_soc_dai
*dai
)
948 struct sti_uniperiph_data
*priv
= snd_soc_dai_get_drvdata(dai
);
949 struct uniperif
*player
= priv
->dai_data
.uni
;
951 if (player
->state
!= UNIPERIF_STATE_STOPPED
)
952 /* Stop the player */
953 uni_player_stop(player
);
955 player
->substream
= NULL
;
958 static int uni_player_parse_dt_clk_glue(struct platform_device
*pdev
,
959 struct uniperif
*player
)
962 struct device_node
*node
= pdev
->dev
.of_node
;
963 struct regmap
*regmap
;
965 bit_offset
= SYS_CFG_AUDI0_GLUE_PCM_CLKX
+ player
->info
->id
;
967 regmap
= syscon_regmap_lookup_by_phandle(node
, "st,syscfg");
970 struct reg_field regfield
=
971 REG_FIELD(SYS_CFG_AUDIO_GLUE
, bit_offset
, bit_offset
);
973 player
->clk_sel
= regmap_field_alloc(regmap
, regfield
);
975 dev_err(&pdev
->dev
, "sti-audio-clk-glue syscf not found\n");
982 static int uni_player_parse_dt(struct platform_device
*pdev
,
983 struct uniperif
*player
)
985 struct uniperif_info
*info
;
986 struct device
*dev
= &pdev
->dev
;
987 struct device_node
*pnode
= pdev
->dev
.of_node
;
990 /* Allocate memory for the info structure */
991 info
= devm_kzalloc(dev
, sizeof(*info
), GFP_KERNEL
);
995 if (of_property_read_u32(pnode
, "st,version", &player
->ver
) ||
996 player
->ver
== SND_ST_UNIPERIF_VERSION_UNKNOWN
) {
997 dev_err(dev
, "Unknown uniperipheral version ");
1000 /* Underflow recovery is only supported on later ip revisions */
1001 if (player
->ver
>= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
)
1002 info
->underflow_enabled
= 1;
1004 if (of_property_read_u32(pnode
, "st,uniperiph-id", &info
->id
)) {
1005 dev_err(dev
, "uniperipheral id not defined");
1009 /* Read the device mode property */
1010 if (of_property_read_string(pnode
, "st,mode", &mode
)) {
1011 dev_err(dev
, "uniperipheral mode not defined");
1015 if (strcasecmp(mode
, "hdmi") == 0)
1016 info
->player_type
= SND_ST_UNIPERIF_PLAYER_TYPE_HDMI
;
1017 else if (strcasecmp(mode
, "pcm") == 0)
1018 info
->player_type
= SND_ST_UNIPERIF_PLAYER_TYPE_PCM
;
1019 else if (strcasecmp(mode
, "spdif") == 0)
1020 info
->player_type
= SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF
;
1022 info
->player_type
= SND_ST_UNIPERIF_PLAYER_TYPE_NONE
;
1024 /* Save the info structure */
1025 player
->info
= info
;
1027 /* Get the PCM_CLK_SEL bit from audio-glue-ctrl SoC register */
1028 if (uni_player_parse_dt_clk_glue(pdev
, player
))
1034 static const struct snd_soc_dai_ops uni_player_dai_ops
= {
1035 .startup
= uni_player_startup
,
1036 .shutdown
= uni_player_shutdown
,
1037 .prepare
= uni_player_prepare
,
1038 .trigger
= uni_player_trigger
,
1039 .hw_params
= sti_uniperiph_dai_hw_params
,
1040 .set_fmt
= sti_uniperiph_dai_set_fmt
,
1041 .set_sysclk
= uni_player_set_sysclk
1044 int uni_player_init(struct platform_device
*pdev
,
1045 struct uniperif
*player
)
1049 player
->dev
= &pdev
->dev
;
1050 player
->state
= UNIPERIF_STATE_STOPPED
;
1051 player
->hw
= &uni_player_pcm_hw
;
1052 player
->dai_ops
= &uni_player_dai_ops
;
1054 ret
= uni_player_parse_dt(pdev
, player
);
1057 dev_err(player
->dev
, "Failed to parse DeviceTree");
1061 /* Get uniperif resource */
1062 player
->clk
= of_clk_get(pdev
->dev
.of_node
, 0);
1063 if (IS_ERR(player
->clk
))
1064 ret
= PTR_ERR(player
->clk
);
1066 /* Select the frequency synthesizer clock */
1067 if (player
->clk_sel
) {
1068 ret
= regmap_field_write(player
->clk_sel
, 1);
1070 dev_err(player
->dev
,
1071 "%s: Failed to select freq synth clock",
1077 ret
= devm_request_irq(&pdev
->dev
, player
->irq
,
1078 uni_player_irq_handler
, IRQF_SHARED
,
1079 dev_name(&pdev
->dev
), player
);
1083 mutex_init(&player
->ctrl_lock
);
1085 /* Ensure that disabled by default */
1086 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player
);
1087 SET_UNIPERIF_CTRL_ROUNDING_OFF(player
);
1088 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player
);
1089 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player
);
1091 if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player
)) {
1092 /* Set default iec958 status bits */
1094 /* Consumer, PCM, copyright, 2ch, mode 0 */
1095 player
->stream_settings
.iec958
.status
[0] = 0x00;
1096 /* Broadcast reception category */
1097 player
->stream_settings
.iec958
.status
[1] =
1098 IEC958_AES1_CON_GENERAL
;
1099 /* Do not take into account source or channel number */
1100 player
->stream_settings
.iec958
.status
[2] =
1101 IEC958_AES2_CON_SOURCE_UNSPEC
;
1102 /* Sampling frequency not indicated */
1103 player
->stream_settings
.iec958
.status
[3] =
1104 IEC958_AES3_CON_FS_NOTID
;
1105 /* Max sample word 24-bit, sample word length not indicated */
1106 player
->stream_settings
.iec958
.status
[4] =
1107 IEC958_AES4_CON_MAX_WORDLEN_24
|
1108 IEC958_AES4_CON_WORDLEN_24_20
;
1110 player
->num_ctrls
= ARRAY_SIZE(snd_sti_iec_ctl
);
1111 player
->snd_ctrls
= snd_sti_iec_ctl
[0];
1113 player
->num_ctrls
= ARRAY_SIZE(snd_sti_pcm_ctl
);
1114 player
->snd_ctrls
= snd_sti_pcm_ctl
[0];
1119 EXPORT_SYMBOL_GPL(uni_player_init
);