diff options
| -rw-r--r-- | drivers/soundwire/Makefile | 2 | ||||
| -rw-r--r-- | drivers/soundwire/amd_init.c | 147 | ||||
| -rw-r--r-- | drivers/soundwire/amd_init.h | 13 | ||||
| -rw-r--r-- | drivers/soundwire/amd_manager.c | 18 | ||||
| -rw-r--r-- | include/linux/soundwire/sdw_amd.h | 56 |
5 files changed, 220 insertions, 16 deletions
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile index 657f5888a77b..e80a2c2cf3e7 100644 --- a/drivers/soundwire/Makefile +++ b/drivers/soundwire/Makefile @@ -20,7 +20,7 @@ soundwire-bus-y += irq.o endif #AMD driver -soundwire-amd-y := amd_manager.o +soundwire-amd-y := amd_init.o amd_manager.o obj-$(CONFIG_SOUNDWIRE_AMD) += soundwire-amd.o #Cadence Objs diff --git a/drivers/soundwire/amd_init.c b/drivers/soundwire/amd_init.c new file mode 100644 index 000000000000..699391d9acba --- /dev/null +++ b/drivers/soundwire/amd_init.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) +/* + * SoundWire AMD Manager Initialize routines + * + * Initializes and creates SDW devices based on ACPI and Hardware values + * + * Copyright 2024 Advanced Micro Devices, Inc. + */ + +#include <linux/acpi.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include "amd_init.h" + +static int sdw_amd_cleanup(struct sdw_amd_ctx *ctx) +{ + int i; + + for (i = 0; i < ctx->count; i++) { + if (!(ctx->link_mask & BIT(i))) + continue; + platform_device_unregister(ctx->pdev[i]); + } + + return 0; +} + +static struct sdw_amd_ctx *sdw_amd_probe_controller(struct sdw_amd_res *res) +{ + struct sdw_amd_ctx *ctx; + struct acpi_device *adev; + struct resource *sdw_res; + struct acp_sdw_pdata sdw_pdata[2]; + struct platform_device_info pdevinfo[2]; + u32 link_mask; + int count, index; + + 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; + ctx->link_mask = res->link_mask; + sdw_res = kzalloc(sizeof(*sdw_res), GFP_KERNEL); + if (!sdw_res) { + kfree(ctx); + return NULL; + } + sdw_res->flags = IORESOURCE_MEM; + sdw_res->start = res->addr; + sdw_res->end = res->addr + res->reg_range; + memset(&pdevinfo, 0, sizeof(pdevinfo)); + link_mask = ctx->link_mask; + for (index = 0; index < count; index++) { + if (!(link_mask & BIT(index))) + continue; + + sdw_pdata[index].instance = index; + sdw_pdata[index].acp_sdw_lock = res->acp_lock; + pdevinfo[index].name = "amd_sdw_manager"; + pdevinfo[index].id = index; + pdevinfo[index].parent = res->parent; + pdevinfo[index].num_res = 1; + pdevinfo[index].res = sdw_res; + pdevinfo[index].data = &sdw_pdata[index]; + pdevinfo[index].size_data = sizeof(struct acp_sdw_pdata); + pdevinfo[index].fwnode = acpi_fwnode_handle(adev); + ctx->pdev[index] = platform_device_register_full(&pdevinfo[index]); + if (IS_ERR(ctx->pdev[index])) + goto err; + } + kfree(sdw_res); + return ctx; +err: + while (index--) { + if (!(link_mask & BIT(index))) + continue; + + platform_device_unregister(ctx->pdev[index]); + } + + kfree(sdw_res); + kfree(ctx); + return NULL; +} + +static int sdw_amd_startup(struct sdw_amd_ctx *ctx) +{ + struct amd_sdw_manager *amd_manager; + int i, ret; + + /* Startup SDW Manager devices */ + for (i = 0; i < ctx->count; i++) { + if (!(ctx->link_mask & BIT(i))) + continue; + amd_manager = dev_get_drvdata(&ctx->pdev[i]->dev); + ret = amd_sdw_manager_start(amd_manager); + if (ret) + return ret; + } + + return 0; +} + +int sdw_amd_probe(struct sdw_amd_res *res, struct sdw_amd_ctx **sdw_ctx) +{ + *sdw_ctx = sdw_amd_probe_controller(res); + if (!*sdw_ctx) + return -ENODEV; + + return sdw_amd_startup(*sdw_ctx); +} +EXPORT_SYMBOL_NS(sdw_amd_probe, SOUNDWIRE_AMD_INIT); + +void sdw_amd_exit(struct sdw_amd_ctx *ctx) +{ + sdw_amd_cleanup(ctx); + kfree(ctx->ids); + kfree(ctx); +} +EXPORT_SYMBOL_NS(sdw_amd_exit, SOUNDWIRE_AMD_INIT); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD SoundWire Init Library"); +MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/soundwire/amd_init.h b/drivers/soundwire/amd_init.h new file mode 100644 index 000000000000..928b0c707162 --- /dev/null +++ b/drivers/soundwire/amd_init.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ +/* + * Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved. + */ + +#ifndef __AMD_INIT_H +#define __AMD_INIT_H + +#include <linux/soundwire/sdw_amd.h> + +int amd_sdw_manager_start(struct amd_sdw_manager *amd_manager); + +#endif diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c index f2c66b165be8..efc000334aa0 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -2,7 +2,7 @@ /* * SoundWire AMD Manager driver * - * Copyright 2023 Advanced Micro Devices, Inc. + * Copyright 2023-24 Advanced Micro Devices, Inc. */ #include <linux/completion.h> @@ -19,6 +19,7 @@ #include <sound/pcm_params.h> #include <sound/soc.h> #include "bus.h" +#include "amd_init.h" #include "amd_manager.h" #define DRV_NAME "amd_sdw_manager" @@ -864,10 +865,8 @@ static void amd_sdw_irq_thread(struct work_struct *work) writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7); } -static void amd_sdw_probe_work(struct work_struct *work) +int amd_sdw_manager_start(struct amd_sdw_manager *amd_manager) { - struct amd_sdw_manager *amd_manager = container_of(work, struct amd_sdw_manager, - probe_work); struct sdw_master_prop *prop; int ret; @@ -876,11 +875,11 @@ static void amd_sdw_probe_work(struct work_struct *work) amd_enable_sdw_pads(amd_manager); ret = amd_init_sdw_manager(amd_manager); if (ret) - return; + return ret; amd_enable_sdw_interrupts(amd_manager); ret = amd_enable_sdw_manager(amd_manager); if (ret) - return; + return ret; amd_sdw_set_frameshape(amd_manager); } /* Enable runtime PM */ @@ -889,6 +888,7 @@ static void amd_sdw_probe_work(struct work_struct *work) pm_runtime_mark_last_busy(amd_manager->dev); pm_runtime_set_active(amd_manager->dev); pm_runtime_enable(amd_manager->dev); + return 0; } static int amd_sdw_manager_probe(struct platform_device *pdev) @@ -972,11 +972,6 @@ static int amd_sdw_manager_probe(struct platform_device *pdev) dev_set_drvdata(dev, amd_manager); INIT_WORK(&amd_manager->amd_sdw_irq_thread, amd_sdw_irq_thread); INIT_WORK(&amd_manager->amd_sdw_work, amd_sdw_update_slave_status_work); - INIT_WORK(&amd_manager->probe_work, amd_sdw_probe_work); - /* - * Instead of having lengthy probe sequence, use deferred probe. - */ - schedule_work(&amd_manager->probe_work); return 0; } @@ -986,7 +981,6 @@ static void amd_sdw_manager_remove(struct platform_device *pdev) int ret; pm_runtime_disable(&pdev->dev); - cancel_work_sync(&amd_manager->probe_work); amd_disable_sdw_interrupts(amd_manager); sdw_bus_master_delete(&amd_manager->bus); ret = amd_disable_sdw_manager(amd_manager); diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sdw_amd.h index 56b4117c087a..54735fa49759 100644 --- a/include/linux/soundwire/sdw_amd.h +++ b/include/linux/soundwire/sdw_amd.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ /* - * Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved. + * Copyright (C) 2023-24 Advanced Micro Devices, Inc. All rights reserved. */ #ifndef __SDW_AMD_H @@ -26,6 +26,7 @@ #define AMD_SDW_POWER_OFF_MODE 2 #define ACP_SDW0 0 #define ACP_SDW1 1 +#define AMD_SDW_MAX_MANAGER_COUNT 2 struct acp_sdw_pdata { u16 instance; @@ -63,7 +64,6 @@ struct sdw_amd_dai_runtime { * @reg_mask: register mask structure per manager instance * @amd_sdw_irq_thread: SoundWire manager irq workqueue * @amd_sdw_work: peripheral status work queue - * @probe_work: SoundWire manager probe workqueue * @acp_sdw_lock: mutex to protect acp share register access * @status: peripheral devices status array * @num_din_ports: number of input ports @@ -87,7 +87,6 @@ struct amd_sdw_manager { struct sdw_manager_reg_mask *reg_mask; struct work_struct amd_sdw_irq_thread; struct work_struct amd_sdw_work; - struct work_struct probe_work; /* mutex to protect acp common register access */ struct mutex *acp_sdw_lock; @@ -120,5 +119,56 @@ struct sdw_amd_acpi_info { u32 link_mask; }; +/** + * struct sdw_amd_ctx - context allocated by the controller driver probe + * + * @count: link count + * @num_slaves: total number of devices exposed across all enabled links + * @link_mask: bit-wise mask listing SoundWire links reported by the + * Controller + * @ids: array of slave_id, representing Slaves exposed across all enabled + * links + * @pdev: platform device structure + */ +struct sdw_amd_ctx { + int count; + int num_slaves; + u32 link_mask; + struct sdw_extended_slave_id *ids; + struct platform_device *pdev[AMD_SDW_MAX_MANAGER_COUNT]; +}; + +/** + * struct sdw_amd_res - Soundwire AMD global resource structure, + * typically populated by the DSP driver/Legacy driver + * + * @addr: acp pci device resource start address + * @reg_range: ACP register range + * @link_mask: bit-wise mask listing links selected by the DSP driver/ + * legacy driver + * @count: link count + * @mmio_base: mmio base of SoundWire registers + * @handle: ACPI parent handle + * @parent: parent device + * @dev: device implementing hwparams and free callbacks + * @acp_lock: mutex protecting acp common registers access + */ +struct sdw_amd_res { + u32 addr; + u32 reg_range; + u32 link_mask; + int count; + void __iomem *mmio_base; + acpi_handle handle; + struct device *parent; + struct device *dev; + /* use to protect acp common registers access */ + struct mutex *acp_lock; +}; + +int sdw_amd_probe(struct sdw_amd_res *res, struct sdw_amd_ctx **ctx); + +void sdw_amd_exit(struct sdw_amd_ctx *ctx); + int amd_sdw_scan_controller(struct sdw_amd_acpi_info *info); #endif |