From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/soundwire/intel_init.c | 390 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 390 insertions(+) create mode 100644 drivers/soundwire/intel_init.c (limited to 'drivers/soundwire/intel_init.c') diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c new file mode 100644 index 000000000..534c8795e --- /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 +#include +#include +#include +#include +#include +#include +#include +#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"); -- cgit v1.2.3