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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __I2C_GENERIC_CHIP_H__
#define __I2C_GENERIC_CHIP_H__
#include <acpi/acpi_device.h>
#include <device/i2c_simple.h>
#define MAX_GENERIC_PROPERTY_LIST 10
struct drivers_i2c_generic_config {
const char *hid; /* ACPI _HID (required) */
const char *cid; /* ACPI _CID */
const char *sub; /* ACPI _SUB */
const char *name; /* ACPI Device Name */
const char *desc; /* Device Description */
unsigned int uid; /* ACPI _UID */
enum i2c_speed speed; /* Bus speed in Hz, default is I2C_SPEED_FAST */
const char *compat_string; /* Compatible string for _HID=PRP0001 */
unsigned int wake; /* Wake GPE */
struct acpi_irq irq; /* Interrupt */
/* Use GPIO based interrupt instead of PIRQ */
struct acpi_gpio irq_gpio;
/*
* This flag will add a device property which will indicate
* to the OS that it should probe this device before adding it.
*
* This can be used to declare a device that may not exist on
* the board, for example to support multiple trackpad vendors.
*/
int probed;
/*
* This flag will add a device property which will indicate
* that coreboot should attempt to detect the device on the i2c
* bus before generating a device entry in the SSDT.
*
* This can be used to declare a device that may not exist on
* the board, for example to support multiple touchpads and/or
* touchscreens.
*/
int detect;
/* GPIO used to indicate if this device is present */
unsigned int device_present_gpio;
unsigned int device_present_gpio_invert;
/* Does the device have a power resource? */
bool has_power_resource;
/* GPIO used to take device out of reset or to put it into reset. */
struct acpi_gpio reset_gpio;
/* Delay to be inserted after device is taken out of reset. */
unsigned int reset_delay_ms;
/* Delay to be inserted after device is put into reset. */
unsigned int reset_off_delay_ms;
/* GPIO used to enable device. */
struct acpi_gpio enable_gpio;
/* Delay to be inserted after device is enabled. */
unsigned int enable_delay_ms;
/* Delay to be inserted after device is disabled. */
unsigned int enable_off_delay_ms;
/* GPIO used to stop operation of device. */
struct acpi_gpio stop_gpio;
/* Delay to be inserted after disabling stop. */
unsigned int stop_delay_ms;
/* Delay to be inserted after enabling stop. */
unsigned int stop_off_delay_ms;
/*
* The Rotation Matrix' allows specifying a 3x3 matrix representing
* the orientation of devices, such as accelerometers. Each value in
* the matrix can be one of -1, 0, or 1, indicating the transformation
* applied to the device's axes.
*
* It is expected by linux and required for the OS to correctly interpret
* the data from the device.
*/
bool has_rotation_matrix;
int rotation_matrix[9];
/*
* Chip Direct Mapping is exclusive to Windows, a allows specifying the
* position where a chip is mounted. There are 8 positions:
* 1: 90 Degrees
* 2: 270 Degrees
* 3: 180 Degrees
* 4: 0 Degrees
* 5: 90 Degrees (Inverted)
* 6: 270 Degrees (Inverted)
* 7: 180 Degrees (Inverted)
* 8: 0 Degrees (Inverted)
*
* The _CDM method should return 0xabcd0X, where X is the position.
*/
enum {
CDM_NOT_PRESENT = 0,
CDM_ROT_90,
CDM_ROT_180,
CDM_ROT_270,
CDM_ROT_0,
CDM_ROT_90_INVERT,
CDM_ROT_180_INVERT,
CDM_ROT_270_INVERT,
CDM_ROT_0_INVERT,
} cdm_index;
/* Generic properties for exporting device-specific data to the OS */
struct acpi_dp property_list[MAX_GENERIC_PROPERTY_LIST];
int property_count;
/* Write a _STA method that uses the state of the GPIOs to determine if
* the PowerResource is ON or OFF. If this is false, the _STA method
* will always return ON.
*/
bool use_gpio_for_status;
};
/*
* Fills in generic information about i2c device from device-tree
* properties. Callback can be provided to fill in any
* device-specific information in SSDT.
*
* Parameters:
* dev: Device requesting i2c generic information to be filled
* callback: Callback to fill in device-specific information
* config: Pointer to drivers_i2c_generic_config structure
*/
void i2c_generic_fill_ssdt(const struct device *dev,
void (*callback)(const struct device *dev),
struct drivers_i2c_generic_config *config);
#endif /* __I2C_GENERIC_CHIP_H__ */
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