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| author | Kate Hsuan <hpa@redhat.com> | 2021-08-20 14:04:43 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-08-20 20:00:02 +0200 |
| commit | 386d17b22e422da3285e33fe8dcc282f02d98178 (patch) | |
| tree | 3c682f7e70cc5c91df9e32077bde63b2b4cba870 /drivers/platform/x86/intel_punit_ipc.c | |
| parent | f51c108d361c1f6f738049c3cc5d52734ea74424 (diff) | |
| download | linux-386d17b22e422da3285e33fe8dcc282f02d98178.tar.gz linux-386d17b22e422da3285e33fe8dcc282f02d98178.tar.bz2 linux-386d17b22e422da3285e33fe8dcc282f02d98178.zip | |
platform/x86: intel_punit_ipc: Move to intel sub-directory
Move Intel P-Unit IPC driver to intel sub-directory to improve readability.
Signed-off-by: Kate Hsuan <hpa@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210820110458.73018-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/intel_punit_ipc.c')
| -rw-r--r-- | drivers/platform/x86/intel_punit_ipc.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/drivers/platform/x86/intel_punit_ipc.c b/drivers/platform/x86/intel_punit_ipc.c deleted file mode 100644 index f58b8543f6ac..000000000000 --- a/drivers/platform/x86/intel_punit_ipc.c +++ /dev/null @@ -1,342 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Driver for the Intel P-Unit Mailbox IPC mechanism - * - * (C) Copyright 2015 Intel Corporation - * - * The heart of the P-Unit is the Foxton microcontroller and its firmware, - * which provide mailbox interface for power management usage. - */ - -#include <linux/acpi.h> -#include <linux/bitops.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/mod_devicetable.h> -#include <linux/module.h> -#include <linux/platform_device.h> - -#include <asm/intel_punit_ipc.h> - -/* IPC Mailbox registers */ -#define OFFSET_DATA_LOW 0x0 -#define OFFSET_DATA_HIGH 0x4 -/* bit field of interface register */ -#define CMD_RUN BIT(31) -#define CMD_ERRCODE_MASK GENMASK(7, 0) -#define CMD_PARA1_SHIFT 8 -#define CMD_PARA2_SHIFT 16 - -#define CMD_TIMEOUT_SECONDS 1 - -enum { - BASE_DATA = 0, - BASE_IFACE, - BASE_MAX, -}; - -typedef struct { - struct device *dev; - struct mutex lock; - int irq; - struct completion cmd_complete; - /* base of interface and data registers */ - void __iomem *base[RESERVED_IPC][BASE_MAX]; - IPC_TYPE type; -} IPC_DEV; - -static IPC_DEV *punit_ipcdev; - -static inline u32 ipc_read_status(IPC_DEV *ipcdev, IPC_TYPE type) -{ - return readl(ipcdev->base[type][BASE_IFACE]); -} - -static inline void ipc_write_cmd(IPC_DEV *ipcdev, IPC_TYPE type, u32 cmd) -{ - writel(cmd, ipcdev->base[type][BASE_IFACE]); -} - -static inline u32 ipc_read_data_low(IPC_DEV *ipcdev, IPC_TYPE type) -{ - return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW); -} - -static inline u32 ipc_read_data_high(IPC_DEV *ipcdev, IPC_TYPE type) -{ - return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH); -} - -static inline void ipc_write_data_low(IPC_DEV *ipcdev, IPC_TYPE type, u32 data) -{ - writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW); -} - -static inline void ipc_write_data_high(IPC_DEV *ipcdev, IPC_TYPE type, u32 data) -{ - writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH); -} - -static const char *ipc_err_string(int error) -{ - if (error == IPC_PUNIT_ERR_SUCCESS) - return "no error"; - else if (error == IPC_PUNIT_ERR_INVALID_CMD) - return "invalid command"; - else if (error == IPC_PUNIT_ERR_INVALID_PARAMETER) - return "invalid parameter"; - else if (error == IPC_PUNIT_ERR_CMD_TIMEOUT) - return "command timeout"; - else if (error == IPC_PUNIT_ERR_CMD_LOCKED) - return "command locked"; - else if (error == IPC_PUNIT_ERR_INVALID_VR_ID) - return "invalid vr id"; - else if (error == IPC_PUNIT_ERR_VR_ERR) - return "vr error"; - else - return "unknown error"; -} - -static int intel_punit_ipc_check_status(IPC_DEV *ipcdev, IPC_TYPE type) -{ - int loops = CMD_TIMEOUT_SECONDS * USEC_PER_SEC; - int errcode; - int status; - - if (ipcdev->irq) { - if (!wait_for_completion_timeout(&ipcdev->cmd_complete, - CMD_TIMEOUT_SECONDS * HZ)) { - dev_err(ipcdev->dev, "IPC timed out\n"); - return -ETIMEDOUT; - } - } else { - while ((ipc_read_status(ipcdev, type) & CMD_RUN) && --loops) - udelay(1); - if (!loops) { - dev_err(ipcdev->dev, "IPC timed out\n"); - return -ETIMEDOUT; - } - } - - status = ipc_read_status(ipcdev, type); - errcode = status & CMD_ERRCODE_MASK; - if (errcode) { - dev_err(ipcdev->dev, "IPC failed: %s, IPC_STS=0x%x\n", - ipc_err_string(errcode), status); - return -EIO; - } - - return 0; -} - -/** - * intel_punit_ipc_simple_command() - Simple IPC command - * @cmd: IPC command code. - * @para1: First 8bit parameter, set 0 if not used. - * @para2: Second 8bit parameter, set 0 if not used. - * - * Send a IPC command to P-Unit when there is no data transaction - * - * Return: IPC error code or 0 on success. - */ -int intel_punit_ipc_simple_command(int cmd, int para1, int para2) -{ - IPC_DEV *ipcdev = punit_ipcdev; - IPC_TYPE type; - u32 val; - int ret; - - mutex_lock(&ipcdev->lock); - - reinit_completion(&ipcdev->cmd_complete); - type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET; - - val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK; - val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT; - ipc_write_cmd(ipcdev, type, val); - ret = intel_punit_ipc_check_status(ipcdev, type); - - mutex_unlock(&ipcdev->lock); - - return ret; -} -EXPORT_SYMBOL(intel_punit_ipc_simple_command); - -/** - * intel_punit_ipc_command() - IPC command with data and pointers - * @cmd: IPC command code. - * @para1: First 8bit parameter, set 0 if not used. - * @para2: Second 8bit parameter, set 0 if not used. - * @in: Input data, 32bit for BIOS cmd, two 32bit for GTD and ISPD. - * @out: Output data. - * - * Send a IPC command to P-Unit with data transaction - * - * Return: IPC error code or 0 on success. - */ -int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out) -{ - IPC_DEV *ipcdev = punit_ipcdev; - IPC_TYPE type; - u32 val; - int ret; - - mutex_lock(&ipcdev->lock); - - reinit_completion(&ipcdev->cmd_complete); - type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET; - - if (in) { - ipc_write_data_low(ipcdev, type, *in); - if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) - ipc_write_data_high(ipcdev, type, *++in); - } - - val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK; - val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT; - ipc_write_cmd(ipcdev, type, val); - - ret = intel_punit_ipc_check_status(ipcdev, type); - if (ret) - goto out; - - if (out) { - *out = ipc_read_data_low(ipcdev, type); - if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) - *++out = ipc_read_data_high(ipcdev, type); - } - -out: - mutex_unlock(&ipcdev->lock); - return ret; -} -EXPORT_SYMBOL_GPL(intel_punit_ipc_command); - -static irqreturn_t intel_punit_ioc(int irq, void *dev_id) -{ - IPC_DEV *ipcdev = dev_id; - - complete(&ipcdev->cmd_complete); - return IRQ_HANDLED; -} - -static int intel_punit_get_bars(struct platform_device *pdev) -{ - void __iomem *addr; - - /* - * The following resources are required - * - BIOS_IPC BASE_DATA - * - BIOS_IPC BASE_IFACE - */ - addr = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(addr)) - return PTR_ERR(addr); - punit_ipcdev->base[BIOS_IPC][BASE_DATA] = addr; - - addr = devm_platform_ioremap_resource(pdev, 1); - if (IS_ERR(addr)) - return PTR_ERR(addr); - punit_ipcdev->base[BIOS_IPC][BASE_IFACE] = addr; - - /* - * The following resources are optional - * - ISPDRIVER_IPC BASE_DATA - * - ISPDRIVER_IPC BASE_IFACE - * - GTDRIVER_IPC BASE_DATA - * - GTDRIVER_IPC BASE_IFACE - */ - addr = devm_platform_ioremap_resource(pdev, 2); - if (!IS_ERR(addr)) - punit_ipcdev->base[ISPDRIVER_IPC][BASE_DATA] = addr; - - addr = devm_platform_ioremap_resource(pdev, 3); - if (!IS_ERR(addr)) - punit_ipcdev->base[ISPDRIVER_IPC][BASE_IFACE] = addr; - - addr = devm_platform_ioremap_resource(pdev, 4); - if (!IS_ERR(addr)) - punit_ipcdev->base[GTDRIVER_IPC][BASE_DATA] = addr; - - addr = devm_platform_ioremap_resource(pdev, 5); - if (!IS_ERR(addr)) - punit_ipcdev->base[GTDRIVER_IPC][BASE_IFACE] = addr; - - return 0; -} - -static int intel_punit_ipc_probe(struct platform_device *pdev) -{ - int irq, ret; - - punit_ipcdev = devm_kzalloc(&pdev->dev, - sizeof(*punit_ipcdev), GFP_KERNEL); - if (!punit_ipcdev) - return -ENOMEM; - - platform_set_drvdata(pdev, punit_ipcdev); - - irq = platform_get_irq_optional(pdev, 0); - if (irq < 0) { - dev_warn(&pdev->dev, "Invalid IRQ, using polling mode\n"); - } else { - ret = devm_request_irq(&pdev->dev, irq, intel_punit_ioc, - IRQF_NO_SUSPEND, "intel_punit_ipc", - &punit_ipcdev); - if (ret) { - dev_err(&pdev->dev, "Failed to request irq: %d\n", irq); - return ret; - } - punit_ipcdev->irq = irq; - } - - ret = intel_punit_get_bars(pdev); - if (ret) - return ret; - - punit_ipcdev->dev = &pdev->dev; - mutex_init(&punit_ipcdev->lock); - init_completion(&punit_ipcdev->cmd_complete); - - return 0; -} - -static int intel_punit_ipc_remove(struct platform_device *pdev) -{ - return 0; -} - -static const struct acpi_device_id punit_ipc_acpi_ids[] = { - { "INT34D4", 0 }, - { } -}; -MODULE_DEVICE_TABLE(acpi, punit_ipc_acpi_ids); - -static struct platform_driver intel_punit_ipc_driver = { - .probe = intel_punit_ipc_probe, - .remove = intel_punit_ipc_remove, - .driver = { - .name = "intel_punit_ipc", - .acpi_match_table = ACPI_PTR(punit_ipc_acpi_ids), - }, -}; - -static int __init intel_punit_ipc_init(void) -{ - return platform_driver_register(&intel_punit_ipc_driver); -} - -static void __exit intel_punit_ipc_exit(void) -{ - platform_driver_unregister(&intel_punit_ipc_driver); -} - -MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>"); -MODULE_DESCRIPTION("Intel P-Unit IPC driver"); -MODULE_LICENSE("GPL v2"); - -/* Some modules are dependent on this, so init earlier */ -fs_initcall(intel_punit_ipc_init); -module_exit(intel_punit_ipc_exit); |