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
--- /dev/null
+// 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");
--- /dev/null
+/* 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
/*
* SoundWire AMD Manager driver
*
- * Copyright 2023 Advanced Micro Devices, Inc.
+ * Copyright 2023-24 Advanced Micro Devices, Inc.
*/
#include <linux/completion.h>
#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"
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;
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 */
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)
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;
}
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);
/* 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
#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;
* @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
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;
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
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