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path: root/drivers/platform/x86/intel_pmc_ipc.c
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Diffstat (limited to 'drivers/platform/x86/intel_pmc_ipc.c')
-rw-r--r--drivers/platform/x86/intel_pmc_ipc.c645
1 files changed, 0 insertions, 645 deletions
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
deleted file mode 100644
index 16ca4ee9cdd5..000000000000
--- a/drivers/platform/x86/intel_pmc_ipc.c
+++ /dev/null
@@ -1,645 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Driver for the Intel PMC IPC mechanism
- *
- * (C) Copyright 2014-2015 Intel Corporation
- *
- * This driver is based on Intel SCU IPC driver(intel_scu_ipc.c) by
- * Sreedhara DS <sreedhara.ds@intel.com>
- *
- * PMC running in ARC processor communicates with other entity running in IA
- * core through IPC mechanism which in turn messaging between IA core ad PMC.
- */
-
-#include <linux/acpi.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/io-64-nonatomic-lo-hi.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-
-#include <asm/intel_pmc_ipc.h>
-#include <asm/intel_scu_ipc.h>
-
-#include <linux/platform_data/itco_wdt.h>
-
-/* Residency with clock rate at 19.2MHz to usecs */
-#define S0IX_RESIDENCY_IN_USECS(d, s) \
-({ \
- u64 result = 10ull * ((d) + (s)); \
- do_div(result, 192); \
- result; \
-})
-
-/* exported resources from IFWI */
-#define PLAT_RESOURCE_IPC_INDEX 0
-#define PLAT_RESOURCE_IPC_SIZE 0x1000
-#define PLAT_RESOURCE_GCR_OFFSET 0x1000
-#define PLAT_RESOURCE_GCR_SIZE 0x1000
-#define PLAT_RESOURCE_BIOS_DATA_INDEX 1
-#define PLAT_RESOURCE_BIOS_IFACE_INDEX 2
-#define PLAT_RESOURCE_TELEM_SSRAM_INDEX 3
-#define PLAT_RESOURCE_ISP_DATA_INDEX 4
-#define PLAT_RESOURCE_ISP_IFACE_INDEX 5
-#define PLAT_RESOURCE_GTD_DATA_INDEX 6
-#define PLAT_RESOURCE_GTD_IFACE_INDEX 7
-#define PLAT_RESOURCE_ACPI_IO_INDEX 0
-
-/*
- * BIOS does not create an ACPI device for each PMC function,
- * but exports multiple resources from one ACPI device(IPC) for
- * multiple functions. This driver is responsible to create a
- * platform device and to export resources for those functions.
- */
-#define TCO_DEVICE_NAME "iTCO_wdt"
-#define SMI_EN_OFFSET 0x40
-#define SMI_EN_SIZE 4
-#define TCO_BASE_OFFSET 0x60
-#define TCO_REGS_SIZE 16
-#define PUNIT_DEVICE_NAME "intel_punit_ipc"
-#define TELEMETRY_DEVICE_NAME "intel_telemetry"
-#define TELEM_SSRAM_SIZE 240
-#define TELEM_PMC_SSRAM_OFFSET 0x1B00
-#define TELEM_PUNIT_SSRAM_OFFSET 0x1A00
-#define TCO_PMC_OFFSET 0x08
-#define TCO_PMC_SIZE 0x04
-
-/* PMC register bit definitions */
-
-/* PMC_CFG_REG bit masks */
-#define PMC_CFG_NO_REBOOT_MASK BIT_MASK(4)
-#define PMC_CFG_NO_REBOOT_EN (1 << 4)
-#define PMC_CFG_NO_REBOOT_DIS (0 << 4)
-
-static struct intel_pmc_ipc_dev {
- struct device *dev;
-
- /* The following PMC BARs share the same ACPI device with the IPC */
- resource_size_t acpi_io_base;
- int acpi_io_size;
- struct platform_device *tco_dev;
-
- /* gcr */
- void __iomem *gcr_mem_base;
- bool has_gcr_regs;
- spinlock_t gcr_lock;
-
- /* punit */
- struct platform_device *punit_dev;
- unsigned int punit_res_count;
-
- /* Telemetry */
- resource_size_t telem_pmc_ssram_base;
- resource_size_t telem_punit_ssram_base;
- int telem_pmc_ssram_size;
- int telem_punit_ssram_size;
- u8 telem_res_inval;
- struct platform_device *telemetry_dev;
-} ipcdev;
-
-static inline u64 gcr_data_readq(u32 offset)
-{
- return readq(ipcdev.gcr_mem_base + offset);
-}
-
-static inline int is_gcr_valid(u32 offset)
-{
- if (!ipcdev.has_gcr_regs)
- return -EACCES;
-
- if (offset > PLAT_RESOURCE_GCR_SIZE)
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * intel_pmc_gcr_read64() - Read a 64-bit PMC GCR register
- * @offset: offset of GCR register from GCR address base
- * @data: data pointer for storing the register output
- *
- * Reads the 64-bit PMC GCR register at given offset.
- *
- * Return: negative value on error or 0 on success.
- */
-int intel_pmc_gcr_read64(u32 offset, u64 *data)
-{
- int ret;
-
- spin_lock(&ipcdev.gcr_lock);
-
- ret = is_gcr_valid(offset);
- if (ret < 0) {
- spin_unlock(&ipcdev.gcr_lock);
- return ret;
- }
-
- *data = readq(ipcdev.gcr_mem_base + offset);
-
- spin_unlock(&ipcdev.gcr_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(intel_pmc_gcr_read64);
-
-/**
- * intel_pmc_gcr_update() - Update PMC GCR register bits
- * @offset: offset of GCR register from GCR address base
- * @mask: bit mask for update operation
- * @val: update value
- *
- * Updates the bits of given GCR register as specified by
- * @mask and @val.
- *
- * Return: negative value on error or 0 on success.
- */
-static int intel_pmc_gcr_update(u32 offset, u32 mask, u32 val)
-{
- u32 new_val;
- int ret = 0;
-
- spin_lock(&ipcdev.gcr_lock);
-
- ret = is_gcr_valid(offset);
- if (ret < 0)
- goto gcr_ipc_unlock;
-
- new_val = readl(ipcdev.gcr_mem_base + offset);
-
- new_val &= ~mask;
- new_val |= val & mask;
-
- writel(new_val, ipcdev.gcr_mem_base + offset);
-
- new_val = readl(ipcdev.gcr_mem_base + offset);
-
- /* check whether the bit update is successful */
- if ((new_val & mask) != (val & mask)) {
- ret = -EIO;
- goto gcr_ipc_unlock;
- }
-
-gcr_ipc_unlock:
- spin_unlock(&ipcdev.gcr_lock);
- return ret;
-}
-
-static int update_no_reboot_bit(void *priv, bool set)
-{
- u32 value = set ? PMC_CFG_NO_REBOOT_EN : PMC_CFG_NO_REBOOT_DIS;
-
- return intel_pmc_gcr_update(PMC_GCR_PMC_CFG_REG,
- PMC_CFG_NO_REBOOT_MASK, value);
-}
-
-static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct intel_scu_ipc_dev *scu = dev_get_drvdata(dev);
- int subcmd;
- int cmd;
- int ret;
-
- ret = sscanf(buf, "%d %d", &cmd, &subcmd);
- if (ret != 2) {
- dev_err(dev, "Error args\n");
- return -EINVAL;
- }
-
- ret = intel_scu_ipc_dev_simple_command(scu, cmd, subcmd);
- if (ret) {
- dev_err(dev, "command %d error with %d\n", cmd, ret);
- return ret;
- }
- return (ssize_t)count;
-}
-static DEVICE_ATTR(simplecmd, 0200, NULL, intel_pmc_ipc_simple_cmd_store);
-
-static ssize_t intel_pmc_ipc_northpeak_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct intel_scu_ipc_dev *scu = dev_get_drvdata(dev);
- unsigned long val;
- int subcmd;
- int ret;
-
- ret = kstrtoul(buf, 0, &val);
- if (ret)
- return ret;
-
- if (val)
- subcmd = 1;
- else
- subcmd = 0;
- ret = intel_scu_ipc_dev_simple_command(scu, PMC_IPC_NORTHPEAK_CTRL, subcmd);
- if (ret) {
- dev_err(dev, "command north %d error with %d\n", subcmd, ret);
- return ret;
- }
- return (ssize_t)count;
-}
-static DEVICE_ATTR(northpeak, 0200, NULL, intel_pmc_ipc_northpeak_store);
-
-static struct attribute *intel_ipc_attrs[] = {
- &dev_attr_northpeak.attr,
- &dev_attr_simplecmd.attr,
- NULL
-};
-
-static const struct attribute_group intel_ipc_group = {
- .attrs = intel_ipc_attrs,
-};
-
-static const struct attribute_group *intel_ipc_groups[] = {
- &intel_ipc_group,
- NULL
-};
-
-static struct resource punit_res_array[] = {
- /* Punit BIOS */
- {
- .flags = IORESOURCE_MEM,
- },
- {
- .flags = IORESOURCE_MEM,
- },
- /* Punit ISP */
- {
- .flags = IORESOURCE_MEM,
- },
- {
- .flags = IORESOURCE_MEM,
- },
- /* Punit GTD */
- {
- .flags = IORESOURCE_MEM,
- },
- {
- .flags = IORESOURCE_MEM,
- },
-};
-
-#define TCO_RESOURCE_ACPI_IO 0
-#define TCO_RESOURCE_SMI_EN_IO 1
-#define TCO_RESOURCE_GCR_MEM 2
-static struct resource tco_res[] = {
- /* ACPI - TCO */
- {
- .flags = IORESOURCE_IO,
- },
- /* ACPI - SMI */
- {
- .flags = IORESOURCE_IO,
- },
-};
-
-static struct itco_wdt_platform_data tco_info = {
- .name = "Apollo Lake SoC",
- .version = 5,
- .no_reboot_priv = &ipcdev,
- .update_no_reboot_bit = update_no_reboot_bit,
-};
-
-#define TELEMETRY_RESOURCE_PUNIT_SSRAM 0
-#define TELEMETRY_RESOURCE_PMC_SSRAM 1
-static struct resource telemetry_res[] = {
- /*Telemetry*/
- {
- .flags = IORESOURCE_MEM,
- },
- {
- .flags = IORESOURCE_MEM,
- },
-};
-
-static int ipc_create_punit_device(void)
-{
- struct platform_device *pdev;
- const struct platform_device_info pdevinfo = {
- .parent = ipcdev.dev,
- .name = PUNIT_DEVICE_NAME,
- .id = -1,
- .res = punit_res_array,
- .num_res = ipcdev.punit_res_count,
- };
-
- pdev = platform_device_register_full(&pdevinfo);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- ipcdev.punit_dev = pdev;
-
- return 0;
-}
-
-static int ipc_create_tco_device(void)
-{
- struct platform_device *pdev;
- struct resource *res;
- const struct platform_device_info pdevinfo = {
- .parent = ipcdev.dev,
- .name = TCO_DEVICE_NAME,
- .id = -1,
- .res = tco_res,
- .num_res = ARRAY_SIZE(tco_res),
- .data = &tco_info,
- .size_data = sizeof(tco_info),
- };
-
- res = tco_res + TCO_RESOURCE_ACPI_IO;
- res->start = ipcdev.acpi_io_base + TCO_BASE_OFFSET;
- res->end = res->start + TCO_REGS_SIZE - 1;
-
- res = tco_res + TCO_RESOURCE_SMI_EN_IO;
- res->start = ipcdev.acpi_io_base + SMI_EN_OFFSET;
- res->end = res->start + SMI_EN_SIZE - 1;
-
- pdev = platform_device_register_full(&pdevinfo);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- ipcdev.tco_dev = pdev;
-
- return 0;
-}
-
-static int ipc_create_telemetry_device(void)
-{
- struct platform_device *pdev;
- struct resource *res;
- const struct platform_device_info pdevinfo = {
- .parent = ipcdev.dev,
- .name = TELEMETRY_DEVICE_NAME,
- .id = -1,
- .res = telemetry_res,
- .num_res = ARRAY_SIZE(telemetry_res),
- };
-
- res = telemetry_res + TELEMETRY_RESOURCE_PUNIT_SSRAM;
- res->start = ipcdev.telem_punit_ssram_base;
- res->end = res->start + ipcdev.telem_punit_ssram_size - 1;
-
- res = telemetry_res + TELEMETRY_RESOURCE_PMC_SSRAM;
- res->start = ipcdev.telem_pmc_ssram_base;
- res->end = res->start + ipcdev.telem_pmc_ssram_size - 1;
-
- pdev = platform_device_register_full(&pdevinfo);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- ipcdev.telemetry_dev = pdev;
-
- return 0;
-}
-
-static int ipc_create_pmc_devices(void)
-{
- int ret;
-
- /* If we have ACPI based watchdog use that instead */
- if (!acpi_has_watchdog()) {
- ret = ipc_create_tco_device();
- if (ret) {
- dev_err(ipcdev.dev, "Failed to add tco platform device\n");
- return ret;
- }
- }
-
- ret = ipc_create_punit_device();
- if (ret) {
- dev_err(ipcdev.dev, "Failed to add punit platform device\n");
- platform_device_unregister(ipcdev.tco_dev);
- return ret;
- }
-
- if (!ipcdev.telem_res_inval) {
- ret = ipc_create_telemetry_device();
- if (ret) {
- dev_warn(ipcdev.dev,
- "Failed to add telemetry platform device\n");
- platform_device_unregister(ipcdev.punit_dev);
- platform_device_unregister(ipcdev.tco_dev);
- }
- }
-
- return ret;
-}
-
-static int ipc_plat_get_res(struct platform_device *pdev,
- struct intel_scu_ipc_data *scu_data)
-{
- struct resource *res, *punit_res = punit_res_array;
- resource_size_t start;
- void __iomem *addr;
- int size;
-
- res = platform_get_resource(pdev, IORESOURCE_IO,
- PLAT_RESOURCE_ACPI_IO_INDEX);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get io resource\n");
- return -ENXIO;
- }
- size = resource_size(res);
- ipcdev.acpi_io_base = res->start;
- ipcdev.acpi_io_size = size;
- dev_info(&pdev->dev, "io res: %pR\n", res);
-
- ipcdev.punit_res_count = 0;
-
- /* This is index 0 to cover BIOS data register */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_BIOS_DATA_INDEX);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get res of punit BIOS data\n");
- return -ENXIO;
- }
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit BIOS data res: %pR\n", res);
-
- /* This is index 1 to cover BIOS interface register */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_BIOS_IFACE_INDEX);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get res of punit BIOS iface\n");
- return -ENXIO;
- }
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit BIOS interface res: %pR\n", res);
-
- /* This is index 2 to cover ISP data register, optional */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_ISP_DATA_INDEX);
- if (res) {
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit ISP data res: %pR\n", res);
- }
-
- /* This is index 3 to cover ISP interface register, optional */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_ISP_IFACE_INDEX);
- if (res) {
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit ISP interface res: %pR\n", res);
- }
-
- /* This is index 4 to cover GTD data register, optional */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_GTD_DATA_INDEX);
- if (res) {
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit GTD data res: %pR\n", res);
- }
-
- /* This is index 5 to cover GTD interface register, optional */
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_GTD_IFACE_INDEX);
- if (res) {
- punit_res[ipcdev.punit_res_count++] = *res;
- dev_info(&pdev->dev, "punit GTD interface res: %pR\n", res);
- }
-
- scu_data->irq = platform_get_irq(pdev, 0);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_IPC_INDEX);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get ipc resource\n");
- return -ENXIO;
- }
- dev_info(&pdev->dev, "ipc res: %pR\n", res);
-
- scu_data->mem.flags = res->flags;
- scu_data->mem.start = res->start;
- scu_data->mem.end = res->start + PLAT_RESOURCE_IPC_SIZE - 1;
-
- start = res->start + PLAT_RESOURCE_GCR_OFFSET;
- if (!devm_request_mem_region(&pdev->dev, start, PLAT_RESOURCE_GCR_SIZE,
- "pmc_ipc_plat"))
- return -EBUSY;
-
- addr = devm_ioremap(&pdev->dev, start, PLAT_RESOURCE_GCR_SIZE);
- if (!addr)
- return -ENOMEM;
-
- ipcdev.gcr_mem_base = addr;
-
- ipcdev.telem_res_inval = 0;
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_TELEM_SSRAM_INDEX);
- if (!res) {
- dev_err(&pdev->dev, "Failed to get telemetry ssram resource\n");
- ipcdev.telem_res_inval = 1;
- } else {
- ipcdev.telem_punit_ssram_base = res->start +
- TELEM_PUNIT_SSRAM_OFFSET;
- ipcdev.telem_punit_ssram_size = TELEM_SSRAM_SIZE;
- ipcdev.telem_pmc_ssram_base = res->start +
- TELEM_PMC_SSRAM_OFFSET;
- ipcdev.telem_pmc_ssram_size = TELEM_SSRAM_SIZE;
- dev_info(&pdev->dev, "telemetry ssram res: %pR\n", res);
- }
-
- return 0;
-}
-
-/**
- * intel_pmc_s0ix_counter_read() - Read S0ix residency.
- * @data: Out param that contains current S0ix residency count.
- *
- * Return: an error code or 0 on success.
- */
-int intel_pmc_s0ix_counter_read(u64 *data)
-{
- u64 deep, shlw;
-
- if (!ipcdev.has_gcr_regs)
- return -EACCES;
-
- deep = gcr_data_readq(PMC_GCR_TELEM_DEEP_S0IX_REG);
- shlw = gcr_data_readq(PMC_GCR_TELEM_SHLW_S0IX_REG);
-
- *data = S0IX_RESIDENCY_IN_USECS(deep, shlw);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(intel_pmc_s0ix_counter_read);
-
-#ifdef CONFIG_ACPI
-static const struct acpi_device_id ipc_acpi_ids[] = {
- { "INT34D2", 0},
- { }
-};
-MODULE_DEVICE_TABLE(acpi, ipc_acpi_ids);
-#endif
-
-static int ipc_plat_probe(struct platform_device *pdev)
-{
- struct intel_scu_ipc_data scu_data = {};
- struct intel_scu_ipc_dev *scu;
- int ret;
-
- ipcdev.dev = &pdev->dev;
- spin_lock_init(&ipcdev.gcr_lock);
-
- ret = ipc_plat_get_res(pdev, &scu_data);
- if (ret) {
- dev_err(&pdev->dev, "Failed to request resource\n");
- return ret;
- }
-
- scu = devm_intel_scu_ipc_register(&pdev->dev, &scu_data);
- if (IS_ERR(scu))
- return PTR_ERR(scu);
-
- platform_set_drvdata(pdev, scu);
-
- ret = ipc_create_pmc_devices();
- if (ret) {
- dev_err(&pdev->dev, "Failed to create pmc devices\n");
- return ret;
- }
-
- ipcdev.has_gcr_regs = true;
-
- return 0;
-}
-
-static int ipc_plat_remove(struct platform_device *pdev)
-{
- platform_device_unregister(ipcdev.tco_dev);
- platform_device_unregister(ipcdev.punit_dev);
- platform_device_unregister(ipcdev.telemetry_dev);
- ipcdev.dev = NULL;
- return 0;
-}
-
-static struct platform_driver ipc_plat_driver = {
- .remove = ipc_plat_remove,
- .probe = ipc_plat_probe,
- .driver = {
- .name = "pmc-ipc-plat",
- .acpi_match_table = ACPI_PTR(ipc_acpi_ids),
- .dev_groups = intel_ipc_groups,
- },
-};
-
-static int __init intel_pmc_ipc_init(void)
-{
- return platform_driver_register(&ipc_plat_driver);
-}
-
-static void __exit intel_pmc_ipc_exit(void)
-{
- platform_driver_unregister(&ipc_plat_driver);
-}
-
-MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>");
-MODULE_DESCRIPTION("Intel PMC IPC driver");
-MODULE_LICENSE("GPL v2");
-
-/* Some modules are dependent on this, so init earlier */
-fs_initcall(intel_pmc_ipc_init);
-module_exit(intel_pmc_ipc_exit);