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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*/
#ifndef _RMI_BUS_H
#define _RMI_BUS_H
#include <linux/rmi.h>
struct rmi_device;
/*
* The interrupt source count in the function descriptor can represent up to
* 6 interrupt sources in the normal manner.
*/
#define RMI_FN_MAX_IRQS 6
/**
* struct rmi_function - represents the implementation of an RMI4
* function for a particular device (basically, a driver for that RMI4 function)
*
* @fd: The function descriptor of the RMI function
* @rmi_dev: Pointer to the RMI device associated with this function container
* @dev: The device associated with this particular function.
*
* @num_of_irqs: The number of irqs needed by this function
* @irq_pos: The position in the irq bitfield this function holds
* @irq_mask: For convenience, can be used to mask IRQ bits off during ATTN
* interrupt handling.
* @irqs: assigned virq numbers (up to num_of_irqs)
*
* @node: entry in device's list of functions
*/
struct rmi_function {
struct rmi_function_descriptor fd;
struct rmi_device *rmi_dev;
struct device dev;
struct list_head node;
unsigned int num_of_irqs;
int irq[RMI_FN_MAX_IRQS];
unsigned int irq_pos;
unsigned long irq_mask[];
};
#define to_rmi_function(d) container_of(d, struct rmi_function, dev)
bool rmi_is_function_device(struct device *dev);
int __must_check rmi_register_function(struct rmi_function *);
void rmi_unregister_function(struct rmi_function *);
/**
* struct rmi_function_handler - driver routines for a particular RMI function.
*
* @func: The RMI function number
* @reset: Called when a reset of the touch sensor is detected. The routine
* should perform any out-of-the-ordinary reset handling that might be
* necessary. Restoring of touch sensor configuration registers should be
* handled in the config() callback, below.
* @config: Called when the function container is first initialized, and
* after a reset is detected. This routine should write any necessary
* configuration settings to the device.
* @attention: Called when the IRQ(s) for the function are set by the touch
* sensor.
* @suspend: Should perform any required operations to suspend the particular
* function.
* @resume: Should perform any required operations to resume the particular
* function.
*
* All callbacks are expected to return 0 on success, error code on failure.
*/
struct rmi_function_handler {
struct device_driver driver;
u8 func;
int (*probe)(struct rmi_function *fn);
void (*remove)(struct rmi_function *fn);
int (*config)(struct rmi_function *fn);
int (*reset)(struct rmi_function *fn);
irqreturn_t (*attention)(int irq, void *ctx);
int (*suspend)(struct rmi_function *fn);
int (*resume)(struct rmi_function *fn);
};
#define to_rmi_function_handler(d) \
container_of(d, struct rmi_function_handler, driver)
int __must_check __rmi_register_function_handler(struct rmi_function_handler *,
struct module *, const char *);
#define rmi_register_function_handler(handler) \
__rmi_register_function_handler(handler, THIS_MODULE, KBUILD_MODNAME)
void rmi_unregister_function_handler(struct rmi_function_handler *);
#define to_rmi_driver(d) \
container_of(d, struct rmi_driver, driver)
#define to_rmi_device(d) container_of(d, struct rmi_device, dev)
static inline struct rmi_device_platform_data *
rmi_get_platform_data(struct rmi_device *d)
{
return &d->xport->pdata;
}
bool rmi_is_physical_device(struct device *dev);
/**
* rmi_reset - reset a RMI4 device
* @d: Pointer to an RMI device
*
* Calls for a reset of each function implemented by a specific device.
* Returns 0 on success or a negative error code.
*/
static inline int rmi_reset(struct rmi_device *d)
{
return d->driver->reset_handler(d);
}
/**
* rmi_read - read a single byte
* @d: Pointer to an RMI device
* @addr: The address to read from
* @buf: The read buffer
*
* Reads a single byte of data using the underlying transport protocol
* into memory pointed by @buf. It returns 0 on success or a negative
* error code.
*/
static inline int rmi_read(struct rmi_device *d, u16 addr, u8 *buf)
{
return d->xport->ops->read_block(d->xport, addr, buf, 1);
}
/**
* rmi_read_block - read a block of bytes
* @d: Pointer to an RMI device
* @addr: The start address to read from
* @buf: The read buffer
* @len: Length of the read buffer
*
* Reads a block of byte data using the underlying transport protocol
* into memory pointed by @buf. It returns 0 on success or a negative
* error code.
*/
static inline int rmi_read_block(struct rmi_device *d, u16 addr,
void *buf, size_t len)
{
return d->xport->ops->read_block(d->xport, addr, buf, len);
}
/**
* rmi_write - write a single byte
* @d: Pointer to an RMI device
* @addr: The address to write to
* @data: The data to write
*
* Writes a single byte using the underlying transport protocol. It
* returns zero on success or a negative error code.
*/
static inline int rmi_write(struct rmi_device *d, u16 addr, u8 data)
{
return d->xport->ops->write_block(d->xport, addr, &data, 1);
}
/**
* rmi_write_block - write a block of bytes
* @d: Pointer to an RMI device
* @addr: The start address to write to
* @buf: The write buffer
* @len: Length of the write buffer
*
* Writes a block of byte data from buf using the underlaying transport
* protocol. It returns the amount of bytes written or a negative error code.
*/
static inline int rmi_write_block(struct rmi_device *d, u16 addr,
const void *buf, size_t len)
{
return d->xport->ops->write_block(d->xport, addr, buf, len);
}
int rmi_for_each_dev(void *data, int (*func)(struct device *dev, void *data));
extern struct bus_type rmi_bus_type;
int rmi_of_property_read_u32(struct device *dev, u32 *result,
const char *prop, bool optional);
#define RMI_DEBUG_CORE BIT(0)
#define RMI_DEBUG_XPORT BIT(1)
#define RMI_DEBUG_FN BIT(2)
#define RMI_DEBUG_2D_SENSOR BIT(3)
void rmi_dbg(int flags, struct device *dev, const char *fmt, ...);
#endif
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