forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
326 lines
7.5 KiB
326 lines
7.5 KiB
// 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/platform_device.h> |
|
#include <linux/pm_runtime.h> |
|
#include <linux/soundwire/sdw_intel.h> |
|
#include "cadence_master.h" |
|
#include "intel.h" |
|
|
|
#define SDW_SHIM_LCAP 0x0 |
|
#define SDW_SHIM_BASE 0x2C000 |
|
#define SDW_ALH_BASE 0x2C800 |
|
#define SDW_LINK_BASE 0x30000 |
|
#define SDW_LINK_SIZE 0x10000 |
|
|
|
static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx) |
|
{ |
|
struct sdw_intel_link_res *link = ctx->links; |
|
u32 link_mask; |
|
int i; |
|
|
|
if (!link) |
|
return 0; |
|
|
|
link_mask = ctx->link_mask; |
|
|
|
for (i = 0; i < ctx->count; i++, link++) { |
|
if (!(link_mask & BIT(i))) |
|
continue; |
|
|
|
if (link->pdev) { |
|
pm_runtime_disable(&link->pdev->dev); |
|
platform_device_unregister(link->pdev); |
|
} |
|
|
|
if (!link->clock_stop_quirks) |
|
pm_runtime_put_noidle(link->dev); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#define HDA_DSP_REG_ADSPIC2 (0x10) |
|
#define HDA_DSP_REG_ADSPIS2 (0x14) |
|
#define HDA_DSP_REG_ADSPIC2_SNDW BIT(5) |
|
|
|
/** |
|
* sdw_intel_enable_irq() - enable/disable Intel SoundWire IRQ |
|
* @mmio_base: The mmio base of the control register |
|
* @enable: true if enable |
|
*/ |
|
void sdw_intel_enable_irq(void __iomem *mmio_base, bool enable) |
|
{ |
|
u32 val; |
|
|
|
val = readl(mmio_base + HDA_DSP_REG_ADSPIC2); |
|
|
|
if (enable) |
|
val |= HDA_DSP_REG_ADSPIC2_SNDW; |
|
else |
|
val &= ~HDA_DSP_REG_ADSPIC2_SNDW; |
|
|
|
writel(val, mmio_base + HDA_DSP_REG_ADSPIC2); |
|
} |
|
EXPORT_SYMBOL_NS(sdw_intel_enable_irq, SOUNDWIRE_INTEL_INIT); |
|
|
|
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); |
|
|
|
sdw_intel_enable_irq(ctx->mmio_base, true); |
|
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 platform_device_info pdevinfo; |
|
struct platform_device *pdev; |
|
struct sdw_intel_link_res *link; |
|
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; |
|
|
|
if (acpi_bus_get_device(res->handle, &adev)) |
|
return NULL; |
|
|
|
if (!res->count) |
|
return NULL; |
|
|
|
count = res->count; |
|
dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count); |
|
|
|
ctx = devm_kzalloc(&adev->dev, sizeof(*ctx), GFP_KERNEL); |
|
if (!ctx) |
|
return NULL; |
|
|
|
ctx->count = count; |
|
ctx->links = devm_kcalloc(&adev->dev, ctx->count, |
|
sizeof(*ctx->links), GFP_KERNEL); |
|
if (!ctx->links) |
|
return NULL; |
|
|
|
ctx->count = count; |
|
ctx->mmio_base = res->mmio_base; |
|
ctx->link_mask = res->link_mask; |
|
ctx->handle = res->handle; |
|
mutex_init(&ctx->shim_lock); |
|
|
|
link = ctx->links; |
|
link_mask = ctx->link_mask; |
|
|
|
INIT_LIST_HEAD(&ctx->link_list); |
|
|
|
/* Create SDW Master devices */ |
|
for (i = 0; i < count; i++, link++) { |
|
if (!(link_mask & BIT(i))) { |
|
dev_dbg(&adev->dev, |
|
"Link %d masked, will not be enabled\n", i); |
|
continue; |
|
} |
|
|
|
link->mmio_base = res->mmio_base; |
|
link->registers = res->mmio_base + SDW_LINK_BASE |
|
+ (SDW_LINK_SIZE * i); |
|
link->shim = res->mmio_base + SDW_SHIM_BASE; |
|
link->alh = res->mmio_base + SDW_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 = link_mask; |
|
|
|
memset(&pdevinfo, 0, sizeof(pdevinfo)); |
|
|
|
pdevinfo.parent = res->parent; |
|
pdevinfo.name = "intel-sdw"; |
|
pdevinfo.id = i; |
|
pdevinfo.fwnode = acpi_fwnode_handle(adev); |
|
pdevinfo.data = link; |
|
pdevinfo.size_data = sizeof(*link); |
|
|
|
pdev = platform_device_register_full(&pdevinfo); |
|
if (IS_ERR(pdev)) { |
|
dev_err(&adev->dev, |
|
"platform device creation failed: %ld\n", |
|
PTR_ERR(pdev)); |
|
goto err; |
|
} |
|
link->pdev = pdev; |
|
link->cdns = platform_get_drvdata(pdev); |
|
|
|
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 = devm_kcalloc(&adev->dev, 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: |
|
ctx->count = i; |
|
sdw_intel_cleanup(ctx); |
|
return NULL; |
|
} |
|
|
|
static int |
|
sdw_intel_startup_controller(struct sdw_intel_ctx *ctx) |
|
{ |
|
struct acpi_device *adev; |
|
struct sdw_intel_link_res *link; |
|
u32 caps; |
|
u32 link_mask; |
|
int i; |
|
|
|
if (acpi_bus_get_device(ctx->handle, &adev)) |
|
return -EINVAL; |
|
|
|
/* Check SNDWLCAP.LCOUNT */ |
|
caps = ioread32(ctx->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP); |
|
caps &= GENMASK(2, 0); |
|
|
|
/* Check HW supported vs property value */ |
|
if (caps < ctx->count) { |
|
dev_err(&adev->dev, |
|
"BIOS master count is larger than hardware capabilities\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!ctx->links) |
|
return -EINVAL; |
|
|
|
link = ctx->links; |
|
link_mask = ctx->link_mask; |
|
|
|
/* Startup SDW Master devices */ |
|
for (i = 0; i < ctx->count; i++, link++) { |
|
if (!(link_mask & BIT(i))) |
|
continue; |
|
|
|
intel_master_startup(link->pdev); |
|
|
|
if (!link->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(link->dev); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* sdw_intel_probe() - SoundWire Intel probe routine |
|
* @res: resource data |
|
* |
|
* This registers a platform device for each Master handled by the controller, |
|
* and SoundWire Master and Slave devices will be created by the platform |
|
* 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); |
|
} |
|
EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT); |
|
|
|
void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx) |
|
{ |
|
struct sdw_intel_link_res *link; |
|
u32 link_mask; |
|
int i; |
|
|
|
if (!ctx->links) |
|
return; |
|
|
|
link = ctx->links; |
|
link_mask = ctx->link_mask; |
|
|
|
/* Startup SDW Master devices */ |
|
for (i = 0; i < ctx->count; i++, link++) { |
|
if (!(link_mask & BIT(i))) |
|
continue; |
|
|
|
intel_master_process_wakeen_event(link->pdev); |
|
} |
|
} |
|
EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT); |
|
|
|
MODULE_LICENSE("Dual BSD/GPL"); |
|
MODULE_DESCRIPTION("Intel Soundwire Init Library");
|
|
|