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