diff options
Diffstat (limited to 'drivers/platform/x86/intel_pmc_ipc.c')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_ipc.c | 949 |
1 files changed, 0 insertions, 949 deletions
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c deleted file mode 100644 index 2433bf73f1ed..000000000000 --- a/drivers/platform/x86/intel_pmc_ipc.c +++ /dev/null @@ -1,949 +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/pci.h> -#include <linux/platform_device.h> - -#include <asm/intel_pmc_ipc.h> - -#include <linux/platform_data/itco_wdt.h> - -/* - * IPC registers - * The IA write to IPC_CMD command register triggers an interrupt to the ARC, - * The ARC handles the interrupt and services it, writing optional data to - * the IPC1 registers, updates the IPC_STS response register with the status. - */ -#define IPC_CMD 0x00 -#define IPC_CMD_MSI BIT(8) -#define IPC_CMD_SIZE 16 -#define IPC_CMD_SUBCMD 12 -#define IPC_STATUS 0x04 -#define IPC_STATUS_IRQ BIT(2) -#define IPC_STATUS_ERR BIT(1) -#define IPC_STATUS_BUSY BIT(0) -#define IPC_SPTR 0x08 -#define IPC_DPTR 0x0C -#define IPC_WRITE_BUFFER 0x80 -#define IPC_READ_BUFFER 0x90 - -/* 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; \ -}) - -/* - * 16-byte buffer for sending data associated with IPC command. - */ -#define IPC_DATA_BUFFER_SIZE 16 - -#define IPC_LOOP_CNT 3000000 -#define IPC_MAX_SEC 3 - -#define IPC_TRIGGER_MODE_IRQ true - -/* 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; - void __iomem *ipc_base; - bool irq_mode; - int irq; - int cmd; - struct completion cmd_complete; - - /* 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 char *ipc_err_sources[] = { - [IPC_ERR_NONE] = - "no error", - [IPC_ERR_CMD_NOT_SUPPORTED] = - "command not supported", - [IPC_ERR_CMD_NOT_SERVICED] = - "command not serviced", - [IPC_ERR_UNABLE_TO_SERVICE] = - "unable to service", - [IPC_ERR_CMD_INVALID] = - "command invalid", - [IPC_ERR_CMD_FAILED] = - "command failed", - [IPC_ERR_EMSECURITY] = - "Invalid Battery", - [IPC_ERR_UNSIGNEDKERNEL] = - "Unsigned kernel", -}; - -/* Prevent concurrent calls to the PMC */ -static DEFINE_MUTEX(ipclock); - -static inline void ipc_send_command(u32 cmd) -{ - ipcdev.cmd = cmd; - if (ipcdev.irq_mode) { - reinit_completion(&ipcdev.cmd_complete); - cmd |= IPC_CMD_MSI; - } - writel(cmd, ipcdev.ipc_base + IPC_CMD); -} - -static inline u32 ipc_read_status(void) -{ - return readl(ipcdev.ipc_base + IPC_STATUS); -} - -static inline void ipc_data_writel(u32 data, u32 offset) -{ - writel(data, ipcdev.ipc_base + IPC_WRITE_BUFFER + offset); -} - -static inline u32 ipc_data_readl(u32 offset) -{ - return readl(ipcdev.ipc_base + IPC_READ_BUFFER + offset); -} - -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 int intel_pmc_ipc_check_status(void) -{ - int status; - int ret = 0; - - if (ipcdev.irq_mode) { - if (0 == wait_for_completion_timeout( - &ipcdev.cmd_complete, IPC_MAX_SEC * HZ)) - ret = -ETIMEDOUT; - } else { - int loop_count = IPC_LOOP_CNT; - - while ((ipc_read_status() & IPC_STATUS_BUSY) && --loop_count) - udelay(1); - if (loop_count == 0) - ret = -ETIMEDOUT; - } - - status = ipc_read_status(); - if (ret == -ETIMEDOUT) { - dev_err(ipcdev.dev, - "IPC timed out, TS=0x%x, CMD=0x%x\n", - status, ipcdev.cmd); - return ret; - } - - if (status & IPC_STATUS_ERR) { - int i; - - ret = -EIO; - i = (status >> IPC_CMD_SIZE) & 0xFF; - if (i < ARRAY_SIZE(ipc_err_sources)) - dev_err(ipcdev.dev, - "IPC failed: %s, STS=0x%x, CMD=0x%x\n", - ipc_err_sources[i], status, ipcdev.cmd); - else - dev_err(ipcdev.dev, - "IPC failed: unknown, STS=0x%x, CMD=0x%x\n", - status, ipcdev.cmd); - if ((i == IPC_ERR_UNSIGNEDKERNEL) || (i == IPC_ERR_EMSECURITY)) - ret = -EACCES; - } - - return ret; -} - -/** - * intel_pmc_ipc_simple_command() - Simple IPC command - * @cmd: IPC command code. - * @sub: IPC command sub type. - * - * Send a simple IPC command to PMC when don't need to specify - * input/output data and source/dest pointers. - * - * Return: an IPC error code or 0 on success. - */ -static int intel_pmc_ipc_simple_command(int cmd, int sub) -{ - int ret; - - mutex_lock(&ipclock); - if (ipcdev.dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } - ipc_send_command(sub << IPC_CMD_SUBCMD | cmd); - ret = intel_pmc_ipc_check_status(); - mutex_unlock(&ipclock); - - return ret; -} - -/** - * intel_pmc_ipc_raw_cmd() - IPC command with data and pointers - * @cmd: IPC command code. - * @sub: IPC command sub type. - * @in: input data of this IPC command. - * @inlen: input data length in bytes. - * @out: output data of this IPC command. - * @outlen: output data length in dwords. - * @sptr: data writing to SPTR register. - * @dptr: data writing to DPTR register. - * - * Send an IPC command to PMC with input/output data and source/dest pointers. - * - * Return: an IPC error code or 0 on success. - */ -static int intel_pmc_ipc_raw_cmd(u32 cmd, u32 sub, u8 *in, u32 inlen, u32 *out, - u32 outlen, u32 dptr, u32 sptr) -{ - u32 wbuf[4] = { 0 }; - int ret; - int i; - - if (inlen > IPC_DATA_BUFFER_SIZE || outlen > IPC_DATA_BUFFER_SIZE / 4) - return -EINVAL; - - mutex_lock(&ipclock); - if (ipcdev.dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } - memcpy(wbuf, in, inlen); - writel(dptr, ipcdev.ipc_base + IPC_DPTR); - writel(sptr, ipcdev.ipc_base + IPC_SPTR); - /* The input data register is 32bit register and inlen is in Byte */ - for (i = 0; i < ((inlen + 3) / 4); i++) - ipc_data_writel(wbuf[i], 4 * i); - ipc_send_command((inlen << IPC_CMD_SIZE) | - (sub << IPC_CMD_SUBCMD) | cmd); - ret = intel_pmc_ipc_check_status(); - if (!ret) { - /* out is read from 32bit register and outlen is in 32bit */ - for (i = 0; i < outlen; i++) - *out++ = ipc_data_readl(4 * i); - } - mutex_unlock(&ipclock); - - return ret; -} - -/** - * intel_pmc_ipc_command() - IPC command with input/output data - * @cmd: IPC command code. - * @sub: IPC command sub type. - * @in: input data of this IPC command. - * @inlen: input data length in bytes. - * @out: output data of this IPC command. - * @outlen: output data length in dwords. - * - * Send an IPC command to PMC with input/output data. - * - * Return: an IPC error code or 0 on success. - */ -int intel_pmc_ipc_command(u32 cmd, u32 sub, u8 *in, u32 inlen, - u32 *out, u32 outlen) -{ - return intel_pmc_ipc_raw_cmd(cmd, sub, in, inlen, out, outlen, 0, 0); -} -EXPORT_SYMBOL_GPL(intel_pmc_ipc_command); - -static irqreturn_t ioc(int irq, void *dev_id) -{ - int status; - - if (ipcdev.irq_mode) { - status = ipc_read_status(); - writel(status | IPC_STATUS_IRQ, ipcdev.ipc_base + IPC_STATUS); - } - complete(&ipcdev.cmd_complete); - - return IRQ_HANDLED; -} - -static int ipc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) -{ - struct intel_pmc_ipc_dev *pmc = &ipcdev; - int ret; - - /* Only one PMC is supported */ - if (pmc->dev) - return -EBUSY; - - pmc->irq_mode = IPC_TRIGGER_MODE_IRQ; - - spin_lock_init(&ipcdev.gcr_lock); - - ret = pcim_enable_device(pdev); - if (ret) - return ret; - - ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); - if (ret) - return ret; - - init_completion(&pmc->cmd_complete); - - pmc->ipc_base = pcim_iomap_table(pdev)[0]; - - ret = devm_request_irq(&pdev->dev, pdev->irq, ioc, 0, "intel_pmc_ipc", - pmc); - if (ret) { - dev_err(&pdev->dev, "Failed to request irq\n"); - return ret; - } - - pmc->dev = &pdev->dev; - - pci_set_drvdata(pdev, pmc); - - return 0; -} - -static const struct pci_device_id ipc_pci_ids[] = { - {PCI_VDEVICE(INTEL, 0x0a94), 0}, - {PCI_VDEVICE(INTEL, 0x1a94), 0}, - {PCI_VDEVICE(INTEL, 0x5a94), 0}, - { 0,} -}; -MODULE_DEVICE_TABLE(pci, ipc_pci_ids); - -static struct pci_driver ipc_pci_driver = { - .name = "intel_pmc_ipc", - .id_table = ipc_pci_ids, - .probe = ipc_pci_probe, -}; - -static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - 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_pmc_ipc_simple_command(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) -{ - 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_pmc_ipc_simple_command(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 resource *res, *punit_res = punit_res_array; - 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); - } - - 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; - } - size = PLAT_RESOURCE_IPC_SIZE + PLAT_RESOURCE_GCR_SIZE; - res->end = res->start + size - 1; - - addr = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(addr)) - return PTR_ERR(addr); - - ipcdev.ipc_base = addr; - - ipcdev.gcr_mem_base = addr + PLAT_RESOURCE_GCR_OFFSET; - dev_info(&pdev->dev, "ipc res: %pR\n", res); - - 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) -{ - int ret; - - ipcdev.dev = &pdev->dev; - ipcdev.irq_mode = IPC_TRIGGER_MODE_IRQ; - init_completion(&ipcdev.cmd_complete); - spin_lock_init(&ipcdev.gcr_lock); - - ipcdev.irq = platform_get_irq(pdev, 0); - if (ipcdev.irq < 0) - return -EINVAL; - - ret = ipc_plat_get_res(pdev); - if (ret) { - dev_err(&pdev->dev, "Failed to request resource\n"); - return ret; - } - - ret = ipc_create_pmc_devices(); - if (ret) { - dev_err(&pdev->dev, "Failed to create pmc devices\n"); - return ret; - } - - if (devm_request_irq(&pdev->dev, ipcdev.irq, ioc, IRQF_NO_SUSPEND, - "intel_pmc_ipc", &ipcdev)) { - dev_err(&pdev->dev, "Failed to request irq\n"); - ret = -EBUSY; - goto err_irq; - } - - ipcdev.has_gcr_regs = true; - - return 0; - -err_irq: - platform_device_unregister(ipcdev.tco_dev); - platform_device_unregister(ipcdev.punit_dev); - platform_device_unregister(ipcdev.telemetry_dev); - - return ret; -} - -static int ipc_plat_remove(struct platform_device *pdev) -{ - devm_free_irq(&pdev->dev, ipcdev.irq, &ipcdev); - 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) -{ - int ret; - - ret = platform_driver_register(&ipc_plat_driver); - if (ret) { - pr_err("Failed to register PMC ipc platform driver\n"); - return ret; - } - ret = pci_register_driver(&ipc_pci_driver); - if (ret) { - pr_err("Failed to register PMC ipc pci driver\n"); - platform_driver_unregister(&ipc_plat_driver); - return ret; - } - return ret; -} - -static void __exit intel_pmc_ipc_exit(void) -{ - pci_unregister_driver(&ipc_pci_driver); - 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); |