linux/drivers/platform/x86/intel_punit_ipc.c
Linus Torvalds 899fbc33fd platform-drivers-x86 for v4.19-1
The driver for Silead touchscreen configurations has been renamed
 from silead_dmi to touchscreen_dmi since it starts supporting other
 touchscreens which require some DMI quirks. At the same release cycle
 it gets expanded to cover cases for Chuwi Vi10, ONDA V891W,
 Connect Tablet 9, Onda V820w, and Cube KNote i1101 tablets.
 
 Another bunch of changes is related to Mellanox platform code to allow
 user space to communicate with Mellanox for system control and
 monitoring purposes. The driver notifies user on hotplug device signal
 receiving.
 
 ASUS WMI drivers recognize lid flip action on UX360, and correctly
 toggles airplane mode LED. In addition the keyboard backlight toggle
 gets support.
 
 ThinkPad ACPI driver enables support for calculator key (on at least P52).
 It also has been fixed to support three characters model designators,
 which are used for modern laptops. Earlier the battery, marked as BAT1,
 on ThinkPad laptops has not been configured properly, which is fixed.
 On the opposite the multi-battery configurations now probed correctly.
 
 Dell SMBIOS driver starts working on some Dell servers which do not
 support token interface. The regression with backlight detection has
 also been fixed. In order to support dock mode on some laptops,
 Intel virtual button driver has been fixed. The last but not least
 is the fix to Intel HID driver due to changes in Dell systems that
 prevented to use power button.
 
 The following is an automated git shortlog grouped by driver:
 
 acer-wmi:
  -  Silence "unsupported" message a bit
  -  refactor function has_cap
 
 asus-nb-wmi:
  -  Add keymap entry for lid flip action on UX360
 
 asus-wireless:
  -  Fix uninitialized symbol usage
  -  Toggle airplane mode LED
 
 asus-wmi:
  -  Add keyboard backlight toggle support
  -  Call led hw_changed API on kbd brightness change
 
 dell-laptop:
  -  Fix backlight detection
 
 dell-smbios:
  -  make a function and a pointer static
 
 dell-smbios-base:
  -  Support systems without tokens
 
 dell-smbios-wmi:
  -  make function dell_smbios_wmi_call static
 
 ideapad-laptop:
  -  Add Y520-15IKBM and Y720-15IKBM to no_hw_rfkill
  -  Apply no_hw_rfkill to Y20-15IKBM, too
 
 intel-hid:
  -  Add support for Device Specific Methods
 
 intel_ips:
  -  remove redundant variables slope and offset
 
 intel_pmc_core:
  -  Add CNP SLPS0 debug registers
 
 intel_punit_ipc:
  -  fix build errors
 
 intel-vbtn:
  -  Add support for dock mode detection
 
 mlx-platform:
  -  Fix copy-paste error in mlxplat_init()
  -  Remove unused define
  -  Change mlxreg-io configuration for MSN274x systems
  -  Allow mlxreg-io driver activation for more systems
  -  Add ASIC hotplug device configuration
  -  Add new attribute for mlxreg-io sysfs interfaces
  -  Add mlxreg-fan platform driver activation
  -  Add documentation mlxreg-io sysfs interfaces
  -  Add mlxreg-io platform driver activation
 
 platform/mellanox:
  -  mlxreg-hotplug: Add hotplug hwmon uevent notification
  -  mlxreg-hotplug: Improve mechanism of ASIC health discovery
  -  Use 2-factor allocator calls
  -  Introduce support for Mellanox register access driver
 
 thinkpad_acpi:
  -  Fix multi-battery bug
  -  extend battery quirk coverage
  -  Support battery quirk
  -  Proper model/release matching
  -  Add support for calculator hotkey
 
 toshiba_acpi:
  -  Fix defined but not used build warnings
  -  Update KBD backlight LED on second gen laptops
 
 touchscreen_dmi:
  -  Rename silead_dmi to touchscreen_dmi
  -  Add touchscreen info for the Chuwi Vi10 tablet
  -  Sort entries alphabetically
  -  Rename trekstor entries
  -  Add info for the Cube KNote i1101 tablet
  -  Add info for the Onda V820w tablet
  -  Add info for the "Connect Tablet 9" tablet
  -  Add info for the ONDA V891W Dual OS tablet
 
 wmi:
  -  Do not mix pages and kmalloc
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Merge tag 'platform-drivers-x86-v4.19-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver updates from Andy Shevchenko:

 - The driver for Silead touchscreen configurations has been renamed
   from silead_dmi to touchscreen_dmi since it starts supporting other
   touchscreens which require some DMI quirks

   It also gets expanded to cover cases for Chuwi Vi10, ONDA V891W,
   Connect Tablet 9, Onda V820w, and Cube KNote i1101 tablets.

 - Another bunch of changes is related to Mellanox platform code to
   allow user space to communicate with Mellanox for system control and
   monitoring purposes. The driver notifies user on hotplug device
   signal receiving.

 - ASUS WMI drivers recognize lid flip action on UX360, and correctly
   toggles airplane mode LED. In addition the keyboard backlight toggle
   gets support.

 - ThinkPad ACPI driver enables support for calculator key (on at least
   P52). It also has been fixed to support three characters model
   designators, which are used for modern laptops. Earlier the battery,
   marked as BAT1, on ThinkPad laptops has not been configured properly,
   which is fixed. On the opposite the multi-battery configurations now
   probed correctly.

 - Dell SMBIOS driver starts working on some Dell servers which do not
   support token interface. The regression with backlight detection has
   also been fixed. In order to support dock mode on some laptops, Intel
   virtual button driver has been fixed. The last but not least is the
   fix to Intel HID driver due to changes in Dell systems that prevented
   to use power button.

* tag 'platform-drivers-x86-v4.19-1' of git://git.infradead.org/linux-platform-drivers-x86: (47 commits)
  platform/x86: acer-wmi: Silence "unsupported" message a bit
  platform/x86: intel_punit_ipc: fix build errors
  platform/x86: ideapad: Add Y520-15IKBM and Y720-15IKBM to no_hw_rfkill
  platform/x86: asus-nb-wmi: Add keymap entry for lid flip action on UX360
  platform/x86: acer-wmi: refactor function has_cap
  platform/x86: thinkpad_acpi: Fix multi-battery bug
  platform/x86: thinkpad_acpi: extend battery quirk coverage
  platform/x86: touchscreen_dmi: Add info for the Cube KNote i1101 tablet
  platform/x86: mlx-platform: Fix copy-paste error in mlxplat_init()
  platform/x86: mlx-platform: Remove unused define
  platform/x86: mlx-platform: Change mlxreg-io configuration for MSN274x systems
  Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces
  platform/x86: mlx-platform: Allow mlxreg-io driver activation for more systems
  platform/x86: mlx-platform: Add ASIC hotplug device configuration
  platform/mellanox: mlxreg-hotplug: Add hotplug hwmon uevent notification
  platform/mellanox: mlxreg-hotplug: Improve mechanism of ASIC health discovery
  platform/x86: mlx-platform: Add mlxreg-fan platform driver activation
  platform/x86: dell-laptop: Fix backlight detection
  platform/x86: toshiba_acpi: Fix defined but not used build warnings
  platform/x86: thinkpad_acpi: Support battery quirk
  ...
2018-08-22 14:14:15 -07:00

361 lines
8.9 KiB
C

/*
* Driver for the Intel P-Unit Mailbox IPC mechanism
*
* (C) Copyright 2015 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The heart of the P-Unit is the Foxton microcontroller and its firmware,
* which provide mailbox interface for power management usage.
*/
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/io.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)
{
struct resource *res;
void __iomem *addr;
/*
* The following resources are required
* - BIOS_IPC BASE_DATA
* - BIOS_IPC BASE_IFACE
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
addr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(addr))
return PTR_ERR(addr);
punit_ipcdev->base[BIOS_IPC][BASE_DATA] = addr;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
addr = devm_ioremap_resource(&pdev->dev, res);
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
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
if (res && resource_size(res) > 1) {
addr = devm_ioremap_resource(&pdev->dev, res);
if (!IS_ERR(addr))
punit_ipcdev->base[ISPDRIVER_IPC][BASE_DATA] = addr;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
if (res && resource_size(res) > 1) {
addr = devm_ioremap_resource(&pdev->dev, res);
if (!IS_ERR(addr))
punit_ipcdev->base[ISPDRIVER_IPC][BASE_IFACE] = addr;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
if (res && resource_size(res) > 1) {
addr = devm_ioremap_resource(&pdev->dev, res);
if (!IS_ERR(addr))
punit_ipcdev->base[GTDRIVER_IPC][BASE_DATA] = addr;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
if (res && resource_size(res) > 1) {
addr = devm_ioremap_resource(&pdev->dev, res);
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(pdev, 0);
if (irq < 0) {
punit_ipcdev->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)
goto out;
punit_ipcdev->dev = &pdev->dev;
mutex_init(&punit_ipcdev->lock);
init_completion(&punit_ipcdev->cmd_complete);
out:
return ret;
}
static int intel_punit_ipc_remove(struct platform_device *pdev)
{
return 0;
}
static const struct acpi_device_id punit_ipc_acpi_ids[] = {
{ "INT34D4", 0 },
{ }
};
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);