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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#ifndef _RMI_H
#define _RMI_H
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/kfifo.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/types.h>
#define NAME_BUFFER_SIZE 256
/**
* struct rmi_2d_axis_alignment - target axis alignment
* @swap_axes: set to TRUE if desired to swap x- and y-axis
* @flip_x: set to TRUE if desired to flip direction on x-axis
* @flip_y: set to TRUE if desired to flip direction on y-axis
* @clip_x_low - reported X coordinates below this setting will be clipped to
* the specified value
* @clip_x_high - reported X coordinates above this setting will be clipped to
* the specified value
* @clip_y_low - reported Y coordinates below this setting will be clipped to
* the specified value
* @clip_y_high - reported Y coordinates above this setting will be clipped to
* the specified value
* @offset_x - this value will be added to all reported X coordinates
* @offset_y - this value will be added to all reported Y coordinates
* @rel_report_enabled - if set to true, the relative reporting will be
* automatically enabled for this sensor.
*/
struct rmi_2d_axis_alignment {
bool swap_axes;
bool flip_x;
bool flip_y;
u16 clip_x_low;
u16 clip_y_low;
u16 clip_x_high;
u16 clip_y_high;
u16 offset_x;
u16 offset_y;
u8 delta_x_threshold;
u8 delta_y_threshold;
};
/** This is used to override any hints an F11 2D sensor might have provided
* as to what type of sensor it is.
*
* @rmi_f11_sensor_default - do not override, determine from F11_2D_QUERY14 if
* available.
* @rmi_f11_sensor_touchscreen - treat the sensor as a touchscreen (direct
* pointing).
* @rmi_f11_sensor_touchpad - thread the sensor as a touchpad (indirect
* pointing).
*/
enum rmi_sensor_type {
rmi_sensor_default = 0,
rmi_sensor_touchscreen,
rmi_sensor_touchpad
};
#define RMI_F11_DISABLE_ABS_REPORT BIT(0)
/**
* struct rmi_2d_sensor_data - overrides defaults for a 2D sensor.
* @axis_align - provides axis alignment overrides (see above).
* @sensor_type - Forces the driver to treat the sensor as an indirect
* pointing device (touchpad) rather than a direct pointing device
* (touchscreen). This is useful when F11_2D_QUERY14 register is not
* available.
* @disable_report_mask - Force data to not be reported even if it is supported
* by the firware.
* @topbuttonpad - Used with the "5 buttons touchpads" found on the Lenovo 40
* series
* @kernel_tracking - most moderns RMI f11 firmwares implement Multifinger
* Type B protocol. However, there are some corner cases where the user
* triggers some jumps by tapping with two fingers on the touchpad.
* Use this setting and dmax to filter out these jumps.
* Also, when using an old sensor using MF Type A behavior, set to true to
* report an actual MT protocol B.
* @dmax - the maximum distance (in sensor units) the kernel tracking allows two
* distincts fingers to be considered the same.
*/
struct rmi_2d_sensor_platform_data {
struct rmi_2d_axis_alignment axis_align;
enum rmi_sensor_type sensor_type;
int x_mm;
int y_mm;
int disable_report_mask;
u16 rezero_wait;
bool topbuttonpad;
bool kernel_tracking;
int dmax;
int dribble;
int palm_detect;
};
/**
* struct rmi_f30_data - overrides defaults for a single F30 GPIOs/LED chip.
* @buttonpad - the touchpad is a buttonpad, so enable only the first actual
* button that is found.
* @trackstick_buttons - Set when the function 30 is handling the physical
* buttons of the trackstick (as a PS/2 passthrough device).
* @disable - the touchpad incorrectly reports F30 and it should be ignored.
* This is a special case which is due to misconfigured firmware.
*/
struct rmi_f30_data {
bool buttonpad;
bool trackstick_buttons;
bool disable;
};
/*
* Set the state of a register
* DEFAULT - use the default value set by the firmware config
* OFF - explicitly disable the register
* ON - explicitly enable the register
*/
enum rmi_reg_state {
RMI_REG_STATE_DEFAULT = 0,
RMI_REG_STATE_OFF = 1,
RMI_REG_STATE_ON = 2
};
/**
* struct rmi_f01_power_management -When non-zero, these values will be written
* to the touch sensor to override the default firmware settigns. For a
* detailed explanation of what each field does, see the corresponding
* documention in the RMI4 specification.
*
* @nosleep - specifies whether the device is permitted to sleep or doze (that
* is, enter a temporary low power state) when no fingers are touching the
* sensor.
* @wakeup_threshold - controls the capacitance threshold at which the touch
* sensor will decide to wake up from that low power state.
* @doze_holdoff - controls how long the touch sensor waits after the last
* finger lifts before entering the doze state, in units of 100ms.
* @doze_interval - controls the interval between checks for finger presence
* when the touch sensor is in doze mode, in units of 10ms.
*/
struct rmi_f01_power_management {
enum rmi_reg_state nosleep;
u8 wakeup_threshold;
u8 doze_holdoff;
u8 doze_interval;
};
/**
* struct rmi_device_platform_data_spi - provides parameters used in SPI
* communications. All Synaptics SPI products support a standard SPI
* interface; some also support what is called SPI V2 mode, depending on
* firmware and/or ASIC limitations. In V2 mode, the touch sensor can
* support shorter delays during certain operations, and these are specified
* separately from the standard mode delays.
*
* @block_delay - for standard SPI transactions consisting of both a read and
* write operation, the delay (in microseconds) between the read and write
* operations.
* @split_read_block_delay_us - for V2 SPI transactions consisting of both a
* read and write operation, the delay (in microseconds) between the read and
* write operations.
* @read_delay_us - the delay between each byte of a read operation in normal
* SPI mode.
* @write_delay_us - the delay between each byte of a write operation in normal
* SPI mode.
* @split_read_byte_delay_us - the delay between each byte of a read operation
* in V2 mode.
* @pre_delay_us - the delay before the start of a SPI transaction. This is
* typically useful in conjunction with custom chip select assertions (see
* below).
* @post_delay_us - the delay after the completion of an SPI transaction. This
* is typically useful in conjunction with custom chip select assertions (see
* below).
* @cs_assert - For systems where the SPI subsystem does not control the CS/SSB
* line, or where such control is broken, you can provide a custom routine to
* handle a GPIO as CS/SSB. This routine will be called at the beginning and
* end of each SPI transaction. The RMI SPI implementation will wait
* pre_delay_us after this routine returns before starting the SPI transfer;
* and post_delay_us after completion of the SPI transfer(s) before calling it
* with assert==FALSE.
*/
struct rmi_device_platform_data_spi {
u32 block_delay_us;
u32 split_read_block_delay_us;
u32 read_delay_us;
u32 write_delay_us;
u32 split_read_byte_delay_us;
u32 pre_delay_us;
u32 post_delay_us;
u8 bits_per_word;
u16 mode;
void *cs_assert_data;
int (*cs_assert)(const void *cs_assert_data, const bool assert);
};
/**
* struct rmi_device_platform_data - system specific configuration info.
*
* @reset_delay_ms - after issuing a reset command to the touch sensor, the
* driver waits a few milliseconds to give the firmware a chance to
* to re-initialize. You can override the default wait period here.
* @irq: irq associated with the attn gpio line, or negative
*/
struct rmi_device_platform_data {
int reset_delay_ms;
int irq;
struct rmi_device_platform_data_spi spi_data;
/* function handler pdata */
struct rmi_2d_sensor_platform_data sensor_pdata;
struct rmi_f01_power_management power_management;
struct rmi_f30_data f30_data;
};
/**
* struct rmi_function_descriptor - RMI function base addresses
*
* @query_base_addr: The RMI Query base address
* @command_base_addr: The RMI Command base address
* @control_base_addr: The RMI Control base address
* @data_base_addr: The RMI Data base address
* @interrupt_source_count: The number of irqs this RMI function needs
* @function_number: The RMI function number
*
* This struct is used when iterating the Page Description Table. The addresses
* are 16-bit values to include the current page address.
*
*/
struct rmi_function_descriptor {
u16 query_base_addr;
u16 command_base_addr;
u16 control_base_addr;
u16 data_base_addr;
u8 interrupt_source_count;
u8 function_number;
u8 function_version;
};
struct rmi_device;
/**
* struct rmi_transport_dev - represent an RMI transport device
*
* @dev: Pointer to the communication device, e.g. i2c or spi
* @rmi_dev: Pointer to the RMI device
* @proto_name: name of the transport protocol (SPI, i2c, etc)
* @ops: pointer to transport operations implementation
*
* The RMI transport device implements the glue between different communication
* buses such as I2C and SPI.
*
*/
struct rmi_transport_dev {
struct device *dev;
struct rmi_device *rmi_dev;
const char *proto_name;
const struct rmi_transport_ops *ops;
struct rmi_device_platform_data pdata;
struct input_dev *input;
};
/**
* struct rmi_transport_ops - defines transport protocol operations.
*
* @write_block: Writing a block of data to the specified address
* @read_block: Read a block of data from the specified address.
*/
struct rmi_transport_ops {
int (*write_block)(struct rmi_transport_dev *xport, u16 addr,
const void *buf, size_t len);
int (*read_block)(struct rmi_transport_dev *xport, u16 addr,
void *buf, size_t len);
int (*reset)(struct rmi_transport_dev *xport, u16 reset_addr);
};
/**
* struct rmi_driver - driver for an RMI4 sensor on the RMI bus.
*
* @driver: Device driver model driver
* @reset_handler: Called when a reset is detected.
* @clear_irq_bits: Clear the specified bits in the current interrupt mask.
* @set_irq_bist: Set the specified bits in the current interrupt mask.
* @store_productid: Callback for cache product id from function 01
* @data: Private data pointer
*
*/
struct rmi_driver {
struct device_driver driver;
int (*reset_handler)(struct rmi_device *rmi_dev);
int (*clear_irq_bits)(struct rmi_device *rmi_dev, unsigned long *mask);
int (*set_irq_bits)(struct rmi_device *rmi_dev, unsigned long *mask);
int (*store_productid)(struct rmi_device *rmi_dev);
int (*set_input_params)(struct rmi_device *rmi_dev,
struct input_dev *input);
void *data;
};
/**
* struct rmi_device - represents an RMI4 sensor device on the RMI bus.
*
* @dev: The device created for the RMI bus
* @number: Unique number for the device on the bus.
* @driver: Pointer to associated driver
* @xport: Pointer to the transport interface
*
*/
struct rmi_device {
struct device dev;
int number;
struct rmi_driver *driver;
struct rmi_transport_dev *xport;
};
struct rmi4_attn_data {
unsigned long irq_status;
size_t size;
void *data;
};
struct rmi_driver_data {
struct list_head function_list;
struct rmi_device *rmi_dev;
struct rmi_function *f01_container;
struct rmi_function *f34_container;
bool bootloader_mode;
int num_of_irq_regs;
int irq_count;
void *irq_memory;
unsigned long *irq_status;
unsigned long *fn_irq_bits;
unsigned long *current_irq_mask;
unsigned long *new_irq_mask;
struct mutex irq_mutex;
struct input_dev *input;
struct irq_domain *irqdomain;
u8 pdt_props;
u8 num_rx_electrodes;
u8 num_tx_electrodes;
bool enabled;
struct mutex enabled_mutex;
struct rmi4_attn_data attn_data;
DECLARE_KFIFO(attn_fifo, struct rmi4_attn_data, 16);
};
int rmi_register_transport_device(struct rmi_transport_dev *xport);
void rmi_unregister_transport_device(struct rmi_transport_dev *xport);
void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
void *data, size_t size);
int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake);
int rmi_driver_resume(struct rmi_device *rmi_dev, bool clear_wake);
#endif
