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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/soundwire/intel_init.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/soundwire/intel_init.c')
-rw-r--r--drivers/soundwire/intel_init.c390
1 files changed, 390 insertions, 0 deletions
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
new file mode 100644
index 0000000000..534c8795e7
--- /dev/null
+++ b/drivers/soundwire/intel_init.c
@@ -0,0 +1,390 @@
+// 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;
+ if (!res->ext) {
+ link->registers = res->mmio_base + SDW_LINK_BASE
+ + (SDW_LINK_SIZE * link_id);
+ link->ip_offset = 0;
+ link->shim = res->mmio_base + res->shim_base;
+ link->alh = res->mmio_base + res->alh_base;
+ link->shim_lock = &ctx->shim_lock;
+ } else {
+ link->registers = res->mmio_base + SDW_IP_BASE(link_id);
+ link->ip_offset = SDW_CADENCE_MCP_IP_OFFSET;
+ link->shim = res->mmio_base + SDW_SHIM2_GENERIC_BASE(link_id);
+ link->shim_vs = res->mmio_base + SDW_SHIM2_VS_BASE(link_id);
+ link->shim_lock = res->eml_lock;
+ }
+
+ link->ops = res->ops;
+ link->dev = res->dev;
+
+ link->clock_stop_quirks = res->clock_stop_quirks;
+ link->shim_mask = &ctx->shim_mask;
+ link->link_mask = ctx->link_mask;
+
+ link->hbus = res->hbus;
+
+ /* 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");