[linux-block.git] / drivers / soundwire / intel_init.c

// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
// Copyright(c) 2015-17 Intel Corporation.

/*
 * SDW Intel Init Routines
 *
 * Initializes and creates SDW devices based on ACPI and Hardware values
 */

#include <linux/acpi.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/auxiliary_bus.h>
#include <linux/pm_runtime.h>
#include <linux/soundwire/sdw_intel.h>
#include "cadence_master.h"
#include "intel.h"
#include "intel_auxdevice.h"

static void intel_link_dev_release(struct device *dev)
{
	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);

	kfree(ldev);
}

/* alloc, init and add link devices */
static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *res,
							  struct sdw_intel_ctx *ctx,
							  struct fwnode_handle *fwnode,
							  const char *name,
							  int link_id)
{
	struct sdw_intel_link_dev *ldev;
	struct sdw_intel_link_res *link;
	struct auxiliary_device *auxdev;
	int ret;

	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
	if (!ldev)
		return ERR_PTR(-ENOMEM);

	auxdev = &ldev->auxdev;
	auxdev->name = name;
	auxdev->dev.parent = res->parent;
	auxdev->dev.fwnode = fwnode;
	auxdev->dev.release = intel_link_dev_release;

	/* we don't use an IDA since we already have a link ID */
	auxdev->id = link_id;

	/*
	 * keep a handle on the allocated memory, to be used in all other functions.
	 * Since the same pattern is used to skip links that are not enabled, there is
	 * no need to check if ctx->ldev[i] is NULL later on.
	 */
	ctx->ldev[link_id] = ldev;

	/* Add link information used in the driver probe */
	link = &ldev->link_res;
	link->hw_ops = res->hw_ops;
	link->mmio_base = res->mmio_base;
	link->registers = res->mmio_base + SDW_LINK_BASE
		+ (SDW_LINK_SIZE * link_id);
	link->shim = res->mmio_base + res->shim_base;
	link->alh = res->mmio_base + res->alh_base;

	link->ops = res->ops;
	link->dev = res->dev;

	link->clock_stop_quirks = res->clock_stop_quirks;
	link->shim_lock = &ctx->shim_lock;
	link->shim_mask = &ctx->shim_mask;
	link->link_mask = ctx->link_mask;

	/* now follow the two-step init/add sequence */
	ret = auxiliary_device_init(auxdev);
	if (ret < 0) {
		dev_err(res->parent, "failed to initialize link dev %s link_id %d\n",
			name, link_id);
		kfree(ldev);
		return ERR_PTR(ret);
	}

	ret = auxiliary_device_add(&ldev->auxdev);
	if (ret < 0) {
		dev_err(res->parent, "failed to add link dev %s link_id %d\n",
			ldev->auxdev.name, link_id);
		/* ldev will be freed with the put_device() and .release sequence */
		auxiliary_device_uninit(&ldev->auxdev);
		return ERR_PTR(ret);
	}

	return ldev;
}

static void intel_link_dev_unregister(struct sdw_intel_link_dev *ldev)
{
	auxiliary_device_delete(&ldev->auxdev);
	auxiliary_device_uninit(&ldev->auxdev);
}

static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
{
	struct sdw_intel_link_dev *ldev;
	u32 link_mask;
	int i;

	link_mask = ctx->link_mask;

	for (i = 0; i < ctx->count; i++) {
		if (!(link_mask & BIT(i)))
			continue;

		ldev = ctx->ldev[i];

		pm_runtime_disable(&ldev->auxdev.dev);
		if (!ldev->link_res.clock_stop_quirks)
			pm_runtime_put_noidle(ldev->link_res.dev);

		intel_link_dev_unregister(ldev);
	}

	return 0;
}

irqreturn_t sdw_intel_thread(int irq, void *dev_id)
{
	struct sdw_intel_ctx *ctx = dev_id;
	struct sdw_intel_link_res *link;

	list_for_each_entry(link, &ctx->link_list, list)
		sdw_cdns_irq(irq, link->cdns);

	return IRQ_HANDLED;
}
EXPORT_SYMBOL_NS(sdw_intel_thread, SOUNDWIRE_INTEL_INIT);

static struct sdw_intel_ctx
*sdw_intel_probe_controller(struct sdw_intel_res *res)
{
	struct sdw_intel_link_res *link;
	struct sdw_intel_link_dev *ldev;
	struct sdw_intel_ctx *ctx;
	struct acpi_device *adev;
	struct sdw_slave *slave;
	struct list_head *node;
	struct sdw_bus *bus;
	u32 link_mask;
	int num_slaves = 0;
	int count;
	int i;

	if (!res)
		return NULL;

	adev = acpi_fetch_acpi_dev(res->handle);
	if (!adev)
		return NULL;

	if (!res->count)
		return NULL;

	count = res->count;
	dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);

	/*
	 * we need to alloc/free memory manually and can't use devm:
	 * this routine may be called from a workqueue, and not from
	 * the parent .probe.
	 * If devm_ was used, the memory might never be freed on errors.
	 */
	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return NULL;

	ctx->count = count;

	/*
	 * allocate the array of pointers. The link-specific data is allocated
	 * as part of the first loop below and released with the auxiliary_device_uninit().
	 * If some links are disabled, the link pointer will remain NULL. Given that the
	 * number of links is small, this is simpler than using a list to keep track of links.
	 */
	ctx->ldev = kcalloc(ctx->count, sizeof(*ctx->ldev), GFP_KERNEL);
	if (!ctx->ldev) {
		kfree(ctx);
		return NULL;
	}

	ctx->mmio_base = res->mmio_base;
	ctx->shim_base = res->shim_base;
	ctx->alh_base = res->alh_base;
	ctx->link_mask = res->link_mask;
	ctx->handle = res->handle;
	mutex_init(&ctx->shim_lock);

	link_mask = ctx->link_mask;

	INIT_LIST_HEAD(&ctx->link_list);

	for (i = 0; i < count; i++) {
		if (!(link_mask & BIT(i)))
			continue;

		/*
		 * init and add a device for each link
		 *
		 * The name of the device will be soundwire_intel.link.[i],
		 * with the "soundwire_intel" module prefix automatically added
		 * by the auxiliary bus core.
		 */
		ldev = intel_link_dev_register(res,
					       ctx,
					       acpi_fwnode_handle(adev),
					       "link",
					       i);
		if (IS_ERR(ldev))
			goto err;

		link = &ldev->link_res;
		link->cdns = auxiliary_get_drvdata(&ldev->auxdev);

		if (!link->cdns) {
			dev_err(&adev->dev, "failed to get link->cdns\n");
			/*
			 * 1 will be subtracted from i in the err label, but we need to call
			 * intel_link_dev_unregister for this ldev, so plus 1 now
			 */
			i++;
			goto err;
		}
		list_add_tail(&link->list, &ctx->link_list);
		bus = &link->cdns->bus;
		/* Calculate number of slaves */
		list_for_each(node, &bus->slaves)
			num_slaves++;
	}

	ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
	if (!ctx->ids)
		goto err;

	ctx->num_slaves = num_slaves;
	i = 0;
	list_for_each_entry(link, &ctx->link_list, list) {
		bus = &link->cdns->bus;
		list_for_each_entry(slave, &bus->slaves, node) {
			ctx->ids[i].id = slave->id;
			ctx->ids[i].link_id = bus->link_id;
			i++;
		}
	}

	return ctx;

err:
	while (i--) {
		if (!(link_mask & BIT(i)))
			continue;
		ldev = ctx->ldev[i];
		intel_link_dev_unregister(ldev);
	}
	kfree(ctx->ldev);
	kfree(ctx);
	return NULL;
}

static int
sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
{
	struct acpi_device *adev = acpi_fetch_acpi_dev(ctx->handle);
	struct sdw_intel_link_dev *ldev;
	u32 link_mask;
	int i;

	if (!adev)
		return -EINVAL;

	if (!ctx->ldev)
		return -EINVAL;

	link_mask = ctx->link_mask;

	/* Startup SDW Master devices */
	for (i = 0; i < ctx->count; i++) {
		if (!(link_mask & BIT(i)))
			continue;

		ldev = ctx->ldev[i];

		intel_link_startup(&ldev->auxdev);

		if (!ldev->link_res.clock_stop_quirks) {
			/*
			 * we need to prevent the parent PCI device
			 * from entering pm_runtime suspend, so that
			 * power rails to the SoundWire IP are not
			 * turned off.
			 */
			pm_runtime_get_noresume(ldev->link_res.dev);
		}
	}

	return 0;
}

/**
 * sdw_intel_probe() - SoundWire Intel probe routine
 * @res: resource data
 *
 * This registers an auxiliary device for each Master handled by the controller,
 * and SoundWire Master and Slave devices will be created by the auxiliary
 * device probe. All the information necessary is stored in the context, and
 * the res argument pointer can be freed after this step.
 * This function will be called after sdw_intel_acpi_scan() by SOF probe.
 */
struct sdw_intel_ctx
*sdw_intel_probe(struct sdw_intel_res *res)
{
	return sdw_intel_probe_controller(res);
}
EXPORT_SYMBOL_NS(sdw_intel_probe, SOUNDWIRE_INTEL_INIT);

/**
 * sdw_intel_startup() - SoundWire Intel startup
 * @ctx: SoundWire context allocated in the probe
 *
 * Startup Intel SoundWire controller. This function will be called after
 * Intel Audio DSP is powered up.
 */
int sdw_intel_startup(struct sdw_intel_ctx *ctx)
{
	return sdw_intel_startup_controller(ctx);
}
EXPORT_SYMBOL_NS(sdw_intel_startup, SOUNDWIRE_INTEL_INIT);
/**
 * sdw_intel_exit() - SoundWire Intel exit
 * @ctx: SoundWire context allocated in the probe
 *
 * Delete the controller instances created and cleanup
 */
void sdw_intel_exit(struct sdw_intel_ctx *ctx)
{
	sdw_intel_cleanup(ctx);
	kfree(ctx->ids);
	kfree(ctx->ldev);
	kfree(ctx);
}
EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT);

void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx)
{
	struct sdw_intel_link_dev *ldev;
	u32 link_mask;
	int i;

	if (!ctx->ldev)
		return;

	link_mask = ctx->link_mask;

	/* Startup SDW Master devices */
	for (i = 0; i < ctx->count; i++) {
		if (!(link_mask & BIT(i)))
			continue;

		ldev = ctx->ldev[i];

		intel_link_process_wakeen_event(&ldev->auxdev);
	}
}
EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Intel Soundwire Init Library");
Commit	Line	Data
	1	// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
	2	// Copyright(c) 2015-17 Intel Corporation.
	3
	4	/*
	5	* SDW Intel Init Routines
	6	*
	7	* Initializes and creates SDW devices based on ACPI and Hardware values
	8	*/
	9
	10	#include <linux/acpi.h>
	11	#include <linux/export.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/io.h>
	14	#include <linux/module.h>
	15	#include <linux/auxiliary_bus.h>
	16	#include <linux/pm_runtime.h>
	17	#include <linux/soundwire/sdw_intel.h>
	18	#include "cadence_master.h"
	19	#include "intel.h"
	20	#include "intel_auxdevice.h"
	21
	22	static void intel_link_dev_release(struct device *dev)
	23	{
	24	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
	25	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
	26
	27	kfree(ldev);
	28	}
	29
	30	/* alloc, init and add link devices */
	31	static struct sdw_intel_link_dev intel_link_dev_register(struct sdw_intel_res res,
	32	struct sdw_intel_ctx *ctx,
	33	struct fwnode_handle *fwnode,
	34	const char *name,
	35	int link_id)
	36	{
	37	struct sdw_intel_link_dev *ldev;
	38	struct sdw_intel_link_res *link;
	39	struct auxiliary_device *auxdev;
	40	int ret;
	41
	42	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
	43	if (!ldev)
	44	return ERR_PTR(-ENOMEM);
	45
	46	auxdev = &ldev->auxdev;
	47	auxdev->name = name;
	48	auxdev->dev.parent = res->parent;
	49	auxdev->dev.fwnode = fwnode;
	50	auxdev->dev.release = intel_link_dev_release;
	51
	52	/* we don't use an IDA since we already have a link ID */
	53	auxdev->id = link_id;
	54
	55	/*
	56	* keep a handle on the allocated memory, to be used in all other functions.
	57	* Since the same pattern is used to skip links that are not enabled, there is
	58	* no need to check if ctx->ldev[i] is NULL later on.
	59	*/
	60	ctx->ldev[link_id] = ldev;
	61
	62	/* Add link information used in the driver probe */
	63	link = &ldev->link_res;
	64	link->hw_ops = res->hw_ops;
	65	link->mmio_base = res->mmio_base;
	66	link->registers = res->mmio_base + SDW_LINK_BASE
	67	+ (SDW_LINK_SIZE * link_id);
	68	link->shim = res->mmio_base + res->shim_base;
	69	link->alh = res->mmio_base + res->alh_base;
	70
	71	link->ops = res->ops;
	72	link->dev = res->dev;
	73
	74	link->clock_stop_quirks = res->clock_stop_quirks;
	75	link->shim_lock = &ctx->shim_lock;
	76	link->shim_mask = &ctx->shim_mask;
	77	link->link_mask = ctx->link_mask;
	78
	79	/* now follow the two-step init/add sequence */
	80	ret = auxiliary_device_init(auxdev);
	81	if (ret < 0) {
	82	dev_err(res->parent, "failed to initialize link dev %s link_id %d\n",
	83	name, link_id);
	84	kfree(ldev);
	85	return ERR_PTR(ret);
	86	}
	87
	88	ret = auxiliary_device_add(&ldev->auxdev);
	89	if (ret < 0) {
	90	dev_err(res->parent, "failed to add link dev %s link_id %d\n",
	91	ldev->auxdev.name, link_id);
	92	/* ldev will be freed with the put_device() and .release sequence */
	93	auxiliary_device_uninit(&ldev->auxdev);
	94	return ERR_PTR(ret);
	95	}
	96
	97	return ldev;
	98	}
	99
	100	static void intel_link_dev_unregister(struct sdw_intel_link_dev *ldev)
	101	{
	102	auxiliary_device_delete(&ldev->auxdev);
	103	auxiliary_device_uninit(&ldev->auxdev);
	104	}
	105
	106	static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
	107	{
	108	struct sdw_intel_link_dev *ldev;
	109	u32 link_mask;
	110	int i;
	111
	112	link_mask = ctx->link_mask;
	113
	114	for (i = 0; i < ctx->count; i++) {
	115	if (!(link_mask & BIT(i)))
	116	continue;
	117
	118	ldev = ctx->ldev[i];
	119
	120	pm_runtime_disable(&ldev->auxdev.dev);
	121	if (!ldev->link_res.clock_stop_quirks)
	122	pm_runtime_put_noidle(ldev->link_res.dev);
	123
	124	intel_link_dev_unregister(ldev);
	125	}
	126
	127	return 0;
	128	}
	129
	130	irqreturn_t sdw_intel_thread(int irq, void *dev_id)
	131	{
	132	struct sdw_intel_ctx *ctx = dev_id;
	133	struct sdw_intel_link_res *link;
	134
	135	list_for_each_entry(link, &ctx->link_list, list)
	136	sdw_cdns_irq(irq, link->cdns);
	137
	138	return IRQ_HANDLED;
	139	}
	140	EXPORT_SYMBOL_NS(sdw_intel_thread, SOUNDWIRE_INTEL_INIT);
	141
	142	static struct sdw_intel_ctx
	143	sdw_intel_probe_controller(struct sdw_intel_res res)
	144	{
	145	struct sdw_intel_link_res *link;
	146	struct sdw_intel_link_dev *ldev;
	147	struct sdw_intel_ctx *ctx;
	148	struct acpi_device *adev;
	149	struct sdw_slave *slave;
	150	struct list_head *node;
	151	struct sdw_bus *bus;
	152	u32 link_mask;
	153	int num_slaves = 0;
	154	int count;
	155	int i;
	156
	157	if (!res)
	158	return NULL;
	159
	160	adev = acpi_fetch_acpi_dev(res->handle);
	161	if (!adev)
	162	return NULL;
	163
	164	if (!res->count)
	165	return NULL;
	166
	167	count = res->count;
	168	dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
	169
	170	/*
	171	* we need to alloc/free memory manually and can't use devm:
	172	* this routine may be called from a workqueue, and not from
	173	* the parent .probe.
	174	* If devm_ was used, the memory might never be freed on errors.
	175	*/
	176	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	177	if (!ctx)
	178	return NULL;
	179
	180	ctx->count = count;
	181
	182	/*
	183	* allocate the array of pointers. The link-specific data is allocated
	184	* as part of the first loop below and released with the auxiliary_device_uninit().
	185	* If some links are disabled, the link pointer will remain NULL. Given that the
	186	* number of links is small, this is simpler than using a list to keep track of links.
	187	*/
	188	ctx->ldev = kcalloc(ctx->count, sizeof(*ctx->ldev), GFP_KERNEL);
	189	if (!ctx->ldev) {
	190	kfree(ctx);
	191	return NULL;
	192	}
	193
	194	ctx->mmio_base = res->mmio_base;
	195	ctx->shim_base = res->shim_base;
	196	ctx->alh_base = res->alh_base;
	197	ctx->link_mask = res->link_mask;
	198	ctx->handle = res->handle;
	199	mutex_init(&ctx->shim_lock);
	200
	201	link_mask = ctx->link_mask;
	202
	203	INIT_LIST_HEAD(&ctx->link_list);
	204
	205	for (i = 0; i < count; i++) {
	206	if (!(link_mask & BIT(i)))
	207	continue;
	208
	209	/*
	210	* init and add a device for each link
	211	*
	212	* The name of the device will be soundwire_intel.link.[i],
	213	* with the "soundwire_intel" module prefix automatically added
	214	* by the auxiliary bus core.
	215	*/
	216	ldev = intel_link_dev_register(res,
	217	ctx,
	218	acpi_fwnode_handle(adev),
	219	"link",
	220	i);
	221	if (IS_ERR(ldev))
	222	goto err;
	223
	224	link = &ldev->link_res;
	225	link->cdns = auxiliary_get_drvdata(&ldev->auxdev);
	226
	227	if (!link->cdns) {
	228	dev_err(&adev->dev, "failed to get link->cdns\n");
	229	/*
	230	* 1 will be subtracted from i in the err label, but we need to call
	231	* intel_link_dev_unregister for this ldev, so plus 1 now
	232	*/
	233	i++;
	234	goto err;
	235	}
	236	list_add_tail(&link->list, &ctx->link_list);
	237	bus = &link->cdns->bus;
	238	/* Calculate number of slaves */
	239	list_for_each(node, &bus->slaves)
	240	num_slaves++;
	241	}
	242
	243	ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
	244	if (!ctx->ids)
	245	goto err;
	246
	247	ctx->num_slaves = num_slaves;
	248	i = 0;
	249	list_for_each_entry(link, &ctx->link_list, list) {
	250	bus = &link->cdns->bus;
	251	list_for_each_entry(slave, &bus->slaves, node) {
	252	ctx->ids[i].id = slave->id;
	253	ctx->ids[i].link_id = bus->link_id;
	254	i++;
	255	}
	256	}
	257
	258	return ctx;
	259
	260	err:
	261	while (i--) {
	262	if (!(link_mask & BIT(i)))
	263	continue;
	264	ldev = ctx->ldev[i];
	265	intel_link_dev_unregister(ldev);
	266	}
	267	kfree(ctx->ldev);
	268	kfree(ctx);
	269	return NULL;
	270	}
	271
	272	static int
	273	sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
	274	{
	275	struct acpi_device *adev = acpi_fetch_acpi_dev(ctx->handle);
	276	struct sdw_intel_link_dev *ldev;
	277	u32 link_mask;
	278	int i;
	279
	280	if (!adev)
	281	return -EINVAL;
	282
	283	if (!ctx->ldev)
	284	return -EINVAL;
	285
	286	link_mask = ctx->link_mask;
	287
	288	/* Startup SDW Master devices */
	289	for (i = 0; i < ctx->count; i++) {
	290	if (!(link_mask & BIT(i)))
	291	continue;
	292
	293	ldev = ctx->ldev[i];
	294
	295	intel_link_startup(&ldev->auxdev);
	296
	297	if (!ldev->link_res.clock_stop_quirks) {
	298	/*
	299	* we need to prevent the parent PCI device
	300	* from entering pm_runtime suspend, so that
	301	* power rails to the SoundWire IP are not
	302	* turned off.
	303	*/
	304	pm_runtime_get_noresume(ldev->link_res.dev);
	305	}
	306	}
	307
	308	return 0;
	309	}
	310
	311	/**
	312	* sdw_intel_probe() - SoundWire Intel probe routine
	313	* @res: resource data
	314	*
	315	* This registers an auxiliary device for each Master handled by the controller,
	316	* and SoundWire Master and Slave devices will be created by the auxiliary
	317	* device probe. All the information necessary is stored in the context, and
	318	* the res argument pointer can be freed after this step.
	319	* This function will be called after sdw_intel_acpi_scan() by SOF probe.
	320	*/
	321	struct sdw_intel_ctx
	322	sdw_intel_probe(struct sdw_intel_res res)
	323	{
	324	return sdw_intel_probe_controller(res);
	325	}
	326	EXPORT_SYMBOL_NS(sdw_intel_probe, SOUNDWIRE_INTEL_INIT);
	327
	328	/**
	329	* sdw_intel_startup() - SoundWire Intel startup
	330	* @ctx: SoundWire context allocated in the probe
	331	*
	332	* Startup Intel SoundWire controller. This function will be called after
	333	* Intel Audio DSP is powered up.
	334	*/
	335	int sdw_intel_startup(struct sdw_intel_ctx *ctx)
	336	{
	337	return sdw_intel_startup_controller(ctx);
	338	}
	339	EXPORT_SYMBOL_NS(sdw_intel_startup, SOUNDWIRE_INTEL_INIT);
	340	/**
	341	* sdw_intel_exit() - SoundWire Intel exit
	342	* @ctx: SoundWire context allocated in the probe
	343	*
	344	* Delete the controller instances created and cleanup
	345	*/
	346	void sdw_intel_exit(struct sdw_intel_ctx *ctx)
	347	{
	348	sdw_intel_cleanup(ctx);
	349	kfree(ctx->ids);
	350	kfree(ctx->ldev);
	351	kfree(ctx);
	352	}
	353	EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT);
	354
	355	void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx)
	356	{
	357	struct sdw_intel_link_dev *ldev;
	358	u32 link_mask;
	359	int i;
	360
	361	if (!ctx->ldev)
	362	return;
	363
	364	link_mask = ctx->link_mask;
	365
	366	/* Startup SDW Master devices */
	367	for (i = 0; i < ctx->count; i++) {
	368	if (!(link_mask & BIT(i)))
	369	continue;
	370
	371	ldev = ctx->ldev[i];
	372
	373	intel_link_process_wakeen_event(&ldev->auxdev);
	374	}
	375	}
	376	EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT);
	377
	378	MODULE_LICENSE("Dual BSD/GPL");
	379	MODULE_DESCRIPTION("Intel Soundwire Init Library");