2 * Copyright (c) 2011-2016 Synaptics Incorporated
3 * Copyright (c) 2011 Unixphere
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
13 #include <linux/rmi.h>
18 * struct rmi_function - represents the implementation of an RMI4
19 * function for a particular device (basically, a driver for that RMI4 function)
21 * @fd: The function descriptor of the RMI function
22 * @rmi_dev: Pointer to the RMI device associated with this function container
23 * @dev: The device associated with this particular function.
25 * @num_of_irqs: The number of irqs needed by this function
26 * @irq_pos: The position in the irq bitfield this function holds
27 * @irq_mask: For convenience, can be used to mask IRQ bits off during ATTN
30 * @node: entry in device's list of functions
33 struct rmi_function_descriptor fd;
34 struct rmi_device *rmi_dev;
36 struct list_head node;
38 unsigned int num_of_irqs;
40 unsigned long irq_mask[];
43 #define to_rmi_function(d) container_of(d, struct rmi_function, dev)
45 bool rmi_is_function_device(struct device *dev);
47 int __must_check rmi_register_function(struct rmi_function *);
48 void rmi_unregister_function(struct rmi_function *);
51 * struct rmi_function_handler - driver routines for a particular RMI function.
53 * @func: The RMI function number
54 * @reset: Called when a reset of the touch sensor is detected. The routine
55 * should perform any out-of-the-ordinary reset handling that might be
56 * necessary. Restoring of touch sensor configuration registers should be
57 * handled in the config() callback, below.
58 * @config: Called when the function container is first initialized, and
59 * after a reset is detected. This routine should write any necessary
60 * configuration settings to the device.
61 * @attention: Called when the IRQ(s) for the function are set by the touch
63 * @suspend: Should perform any required operations to suspend the particular
65 * @resume: Should perform any required operations to resume the particular
68 * All callbacks are expected to return 0 on success, error code on failure.
70 struct rmi_function_handler {
71 struct device_driver driver;
75 int (*probe)(struct rmi_function *fn);
76 void (*remove)(struct rmi_function *fn);
77 int (*config)(struct rmi_function *fn);
78 int (*reset)(struct rmi_function *fn);
79 int (*attention)(struct rmi_function *fn, unsigned long *irq_bits);
80 int (*suspend)(struct rmi_function *fn);
81 int (*resume)(struct rmi_function *fn);
84 #define to_rmi_function_handler(d) \
85 container_of(d, struct rmi_function_handler, driver)
87 int __must_check __rmi_register_function_handler(struct rmi_function_handler *,
88 struct module *, const char *);
89 #define rmi_register_function_handler(handler) \
90 __rmi_register_function_handler(handler, THIS_MODULE, KBUILD_MODNAME)
92 void rmi_unregister_function_handler(struct rmi_function_handler *);
94 #define to_rmi_driver(d) \
95 container_of(d, struct rmi_driver, driver)
97 #define to_rmi_device(d) container_of(d, struct rmi_device, dev)
99 static inline struct rmi_device_platform_data *
100 rmi_get_platform_data(struct rmi_device *d)
102 return &d->xport->pdata;
105 bool rmi_is_physical_device(struct device *dev);
108 * rmi_reset - reset a RMI4 device
109 * @d: Pointer to an RMI device
111 * Calls for a reset of each function implemented by a specific device.
112 * Returns 0 on success or a negative error code.
114 static inline int rmi_reset(struct rmi_device *d)
116 return d->driver->reset_handler(d);
120 * rmi_read - read a single byte
121 * @d: Pointer to an RMI device
122 * @addr: The address to read from
123 * @buf: The read buffer
125 * Reads a single byte of data using the underlying transport protocol
126 * into memory pointed by @buf. It returns 0 on success or a negative
129 static inline int rmi_read(struct rmi_device *d, u16 addr, u8 *buf)
131 return d->xport->ops->read_block(d->xport, addr, buf, 1);
135 * rmi_read_block - read a block of bytes
136 * @d: Pointer to an RMI device
137 * @addr: The start address to read from
138 * @buf: The read buffer
139 * @len: Length of the read buffer
141 * Reads a block of byte data using the underlying transport protocol
142 * into memory pointed by @buf. It returns 0 on success or a negative
145 static inline int rmi_read_block(struct rmi_device *d, u16 addr,
146 void *buf, size_t len)
148 return d->xport->ops->read_block(d->xport, addr, buf, len);
152 * rmi_write - write a single byte
153 * @d: Pointer to an RMI device
154 * @addr: The address to write to
155 * @data: The data to write
157 * Writes a single byte using the underlying transport protocol. It
158 * returns zero on success or a negative error code.
160 static inline int rmi_write(struct rmi_device *d, u16 addr, u8 data)
162 return d->xport->ops->write_block(d->xport, addr, &data, 1);
166 * rmi_write_block - write a block of bytes
167 * @d: Pointer to an RMI device
168 * @addr: The start address to write to
169 * @buf: The write buffer
170 * @len: Length of the write buffer
172 * Writes a block of byte data from buf using the underlaying transport
173 * protocol. It returns the amount of bytes written or a negative error code.
175 static inline int rmi_write_block(struct rmi_device *d, u16 addr,
176 const void *buf, size_t len)
178 return d->xport->ops->write_block(d->xport, addr, buf, len);
181 int rmi_for_each_dev(void *data, int (*func)(struct device *dev, void *data));
183 extern struct bus_type rmi_bus_type;
185 int rmi_of_property_read_u32(struct device *dev, u32 *result,
186 const char *prop, bool optional);
188 #define RMI_DEBUG_CORE BIT(0)
189 #define RMI_DEBUG_XPORT BIT(1)
190 #define RMI_DEBUG_FN BIT(2)
191 #define RMI_DEBUG_2D_SENSOR BIT(3)
193 void rmi_dbg(int flags, struct device *dev, const char *fmt, ...);