linux/drivers/acpi/acpi_apd.c
Linus Torvalds 6a8d7fbf1c More ACPI updates for 5.17-rc1
- Add support for the the Platform Firmware Runtime Update and
    Telemetry (PFRUT) interface based on ACPI to allow certain pieces
    of the platform firmware to be updated without restarting the
    system and to provide a mechanism for collecting platform firmware
    telemetry data (Chen Yu, Dan Carpenter, Yang Yingliang).
 
  - Ignore E820 reservations covering PCI host bridge windows on
    sufficiently recent x86 systems to avoid issues with allocating
    PCI BARs on systems where the E820 reservations cover the entire
    PCI host bridge memory window returned by the _CRS object in the
    system's ACPI tables (Hans de Goede).
 
  - Fix and clean up acpi_scan_init() (Rafael Wysocki).
 
  - Add more sanity checking to ACPI SPCR tables parsing (Mark
    Langsdorf).
 
  - Fix up ACPI APD (AMD Soc) driver initialization (Jiasheng Jiang).
 
  - Drop unnecessary "static" from the ACPI PCC address space handling
    driver added recently (kernel test robot).
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Merge tag 'acpi-5.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI updates from Rafael Wysocki:
 "The most significant item here is the Platform Firmware Runtime Update
  and Telemetry (PFRUT) support designed to allow certain pieces of the
  platform firmware to be updated on the fly, among other things.

  Also important is the e820 handling change on x86 that should work
  around PCI BAR allocation issues on some systems shipping since 2019.

  The rest is just a handful of assorted fixes and cleanups on top of
  the ACPI material merged previously.

  Specifics:

   - Add support for the the Platform Firmware Runtime Update and
     Telemetry (PFRUT) interface based on ACPI to allow certain pieces
     of the platform firmware to be updated without restarting the
     system and to provide a mechanism for collecting platform firmware
     telemetry data (Chen Yu, Dan Carpenter, Yang Yingliang).

   - Ignore E820 reservations covering PCI host bridge windows on
     sufficiently recent x86 systems to avoid issues with allocating PCI
     BARs on systems where the E820 reservations cover the entire PCI
     host bridge memory window returned by the _CRS object in the
     system's ACPI tables (Hans de Goede).

   - Fix and clean up acpi_scan_init() (Rafael Wysocki).

   - Add more sanity checking to ACPI SPCR tables parsing (Mark
     Langsdorf).

   - Fix up ACPI APD (AMD Soc) driver initialization (Jiasheng Jiang).

   - Drop unnecessary "static" from the ACPI PCC address space handling
     driver added recently (kernel test robot)"

* tag 'acpi-5.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PCC: pcc_ctx can be static
  ACPI: scan: Rename label in acpi_scan_init()
  ACPI: scan: Simplify initialization of power and sleep buttons
  ACPI: scan: Change acpi_scan_init() return value type to void
  ACPI: SPCR: check if table->serial_port.access_width is too wide
  ACPI: APD: Check for NULL pointer after calling devm_ioremap()
  x86/PCI: Ignore E820 reservations for bridge windows on newer systems
  ACPI: pfr_telemetry: Fix info leak in pfrt_log_ioctl()
  ACPI: pfr_update: Fix return value check in pfru_write()
  ACPI: tools: Introduce utility for firmware updates/telemetry
  ACPI: Introduce Platform Firmware Runtime Telemetry driver
  ACPI: Introduce Platform Firmware Runtime Update device driver
  efi: Introduce EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER and corresponding structures
2022-01-18 08:51:51 +02:00

266 lines
6.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* AMD ACPI support for ACPI2platform device.
*
* Copyright (c) 2014,2015 AMD Corporation.
* Authors: Ken Xue <Ken.Xue@amd.com>
* Wu, Jeff <Jeff.Wu@amd.com>
*/
#include <linux/acpi.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_data/clk-fch.h>
#include <linux/platform_device.h>
#include "internal.h"
struct apd_private_data;
/**
* struct apd_device_desc - a descriptor for apd device
* @fixed_clk_rate: fixed rate input clock source for acpi device;
* 0 means no fixed rate input clock source
* @properties: build-in properties of the device such as UART
* @setup: a hook routine to set device resource during create platform device
*
* Device description defined as acpi_device_id.driver_data
*/
struct apd_device_desc {
unsigned int fixed_clk_rate;
struct property_entry *properties;
int (*setup)(struct apd_private_data *pdata);
};
struct apd_private_data {
struct clk *clk;
struct acpi_device *adev;
const struct apd_device_desc *dev_desc;
};
#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
#define APD_ADDR(desc) ((unsigned long)&desc)
static int acpi_apd_setup(struct apd_private_data *pdata)
{
const struct apd_device_desc *dev_desc = pdata->dev_desc;
struct clk *clk;
if (dev_desc->fixed_clk_rate) {
clk = clk_register_fixed_rate(&pdata->adev->dev,
dev_name(&pdata->adev->dev),
NULL, 0, dev_desc->fixed_clk_rate);
clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
pdata->clk = clk;
}
return 0;
}
#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
static int misc_check_res(struct acpi_resource *ares, void *data)
{
struct resource res;
return !acpi_dev_resource_memory(ares, &res);
}
static int fch_misc_setup(struct apd_private_data *pdata)
{
struct acpi_device *adev = pdata->adev;
const union acpi_object *obj;
struct platform_device *clkdev;
struct fch_clk_data *clk_data;
struct resource_entry *rentry;
struct list_head resource_list;
int ret;
clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
INIT_LIST_HEAD(&resource_list);
ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
NULL);
if (ret < 0)
return -ENOENT;
if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
GFP_KERNEL);
strcpy(clk_data->name, obj->string.pointer);
} else {
/* Set default name to mclk if entry missing in firmware */
clk_data->name = "mclk";
}
list_for_each_entry(rentry, &resource_list, node) {
clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
resource_size(rentry->res));
break;
}
if (!clk_data->base)
return -ENOMEM;
acpi_dev_free_resource_list(&resource_list);
clkdev = platform_device_register_data(&adev->dev, "clk-fch",
PLATFORM_DEVID_NONE, clk_data,
sizeof(*clk_data));
return PTR_ERR_OR_ZERO(clkdev);
}
static const struct apd_device_desc cz_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 133000000,
};
static const struct apd_device_desc wt_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 150000000,
};
static struct property_entry uart_properties[] = {
PROPERTY_ENTRY_U32("reg-io-width", 4),
PROPERTY_ENTRY_U32("reg-shift", 2),
PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
{ },
};
static const struct apd_device_desc cz_uart_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 48000000,
.properties = uart_properties,
};
static const struct apd_device_desc fch_misc_desc = {
.setup = fch_misc_setup,
};
#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
#ifdef CONFIG_ARM64
static const struct apd_device_desc xgene_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 100000000,
};
static const struct apd_device_desc vulcan_spi_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 133000000,
};
static const struct apd_device_desc hip07_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 200000000,
};
static const struct apd_device_desc hip08_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 250000000,
};
static const struct apd_device_desc hip08_lite_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 125000000,
};
static const struct apd_device_desc thunderx2_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 125000000,
};
static const struct apd_device_desc nxp_i2c_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 350000000,
};
static const struct apd_device_desc hip08_spi_desc = {
.setup = acpi_apd_setup,
.fixed_clk_rate = 250000000,
};
#endif /* CONFIG_ARM64 */
#endif
/*
* Create platform device during acpi scan attach handle.
* Return value > 0 on success of creating device.
*/
static int acpi_apd_create_device(struct acpi_device *adev,
const struct acpi_device_id *id)
{
const struct apd_device_desc *dev_desc = (void *)id->driver_data;
struct apd_private_data *pdata;
struct platform_device *pdev;
int ret;
if (!dev_desc) {
pdev = acpi_create_platform_device(adev, NULL);
return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
}
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
pdata->adev = adev;
pdata->dev_desc = dev_desc;
if (dev_desc->setup) {
ret = dev_desc->setup(pdata);
if (ret)
goto err_out;
}
adev->driver_data = pdata;
pdev = acpi_create_platform_device(adev, dev_desc->properties);
if (!IS_ERR_OR_NULL(pdev))
return 1;
ret = PTR_ERR(pdev);
adev->driver_data = NULL;
err_out:
kfree(pdata);
return ret;
}
static const struct acpi_device_id acpi_apd_device_ids[] = {
/* Generic apd devices */
#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
{ "AMD0010", APD_ADDR(cz_i2c_desc) },
{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
{ "AMD0020", APD_ADDR(cz_uart_desc) },
{ "AMDI0020", APD_ADDR(cz_uart_desc) },
{ "AMDI0022", APD_ADDR(cz_uart_desc) },
{ "AMD0030", },
{ "AMD0040", APD_ADDR(fch_misc_desc)},
{ "HYGO0010", APD_ADDR(wt_i2c_desc) },
#endif
#ifdef CONFIG_ARM64
{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
{ "BRCM900D", APD_ADDR(vulcan_spi_desc) },
{ "CAV900D", APD_ADDR(vulcan_spi_desc) },
{ "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
{ "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
{ "HISI0173", APD_ADDR(hip08_spi_desc) },
{ "NXP0001", APD_ADDR(nxp_i2c_desc) },
#endif
{ }
};
static struct acpi_scan_handler apd_handler = {
.ids = acpi_apd_device_ids,
.attach = acpi_apd_create_device,
};
void __init acpi_apd_init(void)
{
acpi_scan_add_handler(&apd_handler);
}