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1 | /* |
2 | * Copyright (c) 2011-2016 Synaptics Incorporated | |
3 | * Copyright (c) 2011 Unixphere | |
4 | * | |
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. | |
8 | */ | |
9 | ||
10 | #ifndef _RMI_H | |
11 | #define _RMI_H | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/input.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/types.h> | |
19 | ||
20 | #define NAME_BUFFER_SIZE 256 | |
21 | ||
ff8f8370 AD |
22 | /** |
23 | * struct rmi_2d_axis_alignment - target axis alignment | |
24 | * @swap_axes: set to TRUE if desired to swap x- and y-axis | |
25 | * @flip_x: set to TRUE if desired to flip direction on x-axis | |
26 | * @flip_y: set to TRUE if desired to flip direction on y-axis | |
27 | * @clip_x_low - reported X coordinates below this setting will be clipped to | |
28 | * the specified value | |
29 | * @clip_x_high - reported X coordinates above this setting will be clipped to | |
30 | * the specified value | |
31 | * @clip_y_low - reported Y coordinates below this setting will be clipped to | |
32 | * the specified value | |
33 | * @clip_y_high - reported Y coordinates above this setting will be clipped to | |
34 | * the specified value | |
35 | * @offset_x - this value will be added to all reported X coordinates | |
36 | * @offset_y - this value will be added to all reported Y coordinates | |
37 | * @rel_report_enabled - if set to true, the relative reporting will be | |
38 | * automatically enabled for this sensor. | |
39 | */ | |
40 | struct rmi_2d_axis_alignment { | |
41 | bool swap_axes; | |
42 | bool flip_x; | |
43 | bool flip_y; | |
44 | u16 clip_x_low; | |
45 | u16 clip_y_low; | |
46 | u16 clip_x_high; | |
47 | u16 clip_y_high; | |
48 | u16 offset_x; | |
49 | u16 offset_y; | |
50 | u8 delta_x_threshold; | |
51 | u8 delta_y_threshold; | |
52 | }; | |
53 | ||
54 | /** This is used to override any hints an F11 2D sensor might have provided | |
55 | * as to what type of sensor it is. | |
56 | * | |
57 | * @rmi_f11_sensor_default - do not override, determine from F11_2D_QUERY14 if | |
58 | * available. | |
59 | * @rmi_f11_sensor_touchscreen - treat the sensor as a touchscreen (direct | |
60 | * pointing). | |
61 | * @rmi_f11_sensor_touchpad - thread the sensor as a touchpad (indirect | |
62 | * pointing). | |
63 | */ | |
64 | enum rmi_sensor_type { | |
65 | rmi_sensor_default = 0, | |
66 | rmi_sensor_touchscreen, | |
67 | rmi_sensor_touchpad | |
68 | }; | |
69 | ||
70 | #define RMI_F11_DISABLE_ABS_REPORT BIT(0) | |
71 | ||
72 | /** | |
73 | * struct rmi_2d_sensor_data - overrides defaults for a 2D sensor. | |
74 | * @axis_align - provides axis alignment overrides (see above). | |
75 | * @sensor_type - Forces the driver to treat the sensor as an indirect | |
76 | * pointing device (touchpad) rather than a direct pointing device | |
77 | * (touchscreen). This is useful when F11_2D_QUERY14 register is not | |
78 | * available. | |
79 | * @disable_report_mask - Force data to not be reported even if it is supported | |
80 | * by the firware. | |
81 | * @topbuttonpad - Used with the "5 buttons touchpads" found on the Lenovo 40 | |
82 | * series | |
83 | * @kernel_tracking - most moderns RMI f11 firmwares implement Multifinger | |
84 | * Type B protocol. However, there are some corner cases where the user | |
85 | * triggers some jumps by tapping with two fingers on the touchpad. | |
86 | * Use this setting and dmax to filter out these jumps. | |
87 | * Also, when using an old sensor using MF Type A behavior, set to true to | |
88 | * report an actual MT protocol B. | |
89 | * @dmax - the maximum distance (in sensor units) the kernel tracking allows two | |
90 | * distincts fingers to be considered the same. | |
91 | */ | |
92 | struct rmi_2d_sensor_platform_data { | |
93 | struct rmi_2d_axis_alignment axis_align; | |
94 | enum rmi_sensor_type sensor_type; | |
95 | int x_mm; | |
96 | int y_mm; | |
97 | int disable_report_mask; | |
98 | u16 rezero_wait; | |
99 | bool topbuttonpad; | |
100 | bool kernel_tracking; | |
101 | int dmax; | |
102 | }; | |
103 | ||
562b42d3 AD |
104 | /** |
105 | * struct rmi_f30_data - overrides defaults for a single F30 GPIOs/LED chip. | |
106 | * @buttonpad - the touchpad is a buttonpad, so enable only the first actual | |
107 | * button that is found. | |
108 | * @trackstick_buttons - Set when the function 30 is handling the physical | |
109 | * buttons of the trackstick (as a PD/2 passthrough device. | |
110 | * @disable - the touchpad incorrectly reports F30 and it should be ignored. | |
111 | * This is a special case which is due to misconfigured firmware. | |
112 | */ | |
113 | struct rmi_f30_data { | |
114 | bool buttonpad; | |
115 | bool trackstick_buttons; | |
116 | bool disable; | |
117 | }; | |
118 | ||
2b6a321d AD |
119 | /** |
120 | * struct rmi_f01_power - override default power management settings. | |
121 | * | |
122 | */ | |
123 | enum rmi_f01_nosleep { | |
124 | RMI_F01_NOSLEEP_DEFAULT = 0, | |
125 | RMI_F01_NOSLEEP_OFF = 1, | |
126 | RMI_F01_NOSLEEP_ON = 2 | |
127 | }; | |
128 | ||
129 | /** | |
130 | * struct rmi_f01_power_management -When non-zero, these values will be written | |
131 | * to the touch sensor to override the default firmware settigns. For a | |
132 | * detailed explanation of what each field does, see the corresponding | |
133 | * documention in the RMI4 specification. | |
134 | * | |
135 | * @nosleep - specifies whether the device is permitted to sleep or doze (that | |
136 | * is, enter a temporary low power state) when no fingers are touching the | |
137 | * sensor. | |
138 | * @wakeup_threshold - controls the capacitance threshold at which the touch | |
139 | * sensor will decide to wake up from that low power state. | |
140 | * @doze_holdoff - controls how long the touch sensor waits after the last | |
141 | * finger lifts before entering the doze state, in units of 100ms. | |
142 | * @doze_interval - controls the interval between checks for finger presence | |
143 | * when the touch sensor is in doze mode, in units of 10ms. | |
144 | */ | |
145 | struct rmi_f01_power_management { | |
146 | enum rmi_f01_nosleep nosleep; | |
147 | u8 wakeup_threshold; | |
148 | u8 doze_holdoff; | |
149 | u8 doze_interval; | |
150 | }; | |
151 | ||
8d99758d AD |
152 | /** |
153 | * struct rmi_device_platform_data_spi - provides parameters used in SPI | |
154 | * communications. All Synaptics SPI products support a standard SPI | |
155 | * interface; some also support what is called SPI V2 mode, depending on | |
156 | * firmware and/or ASIC limitations. In V2 mode, the touch sensor can | |
157 | * support shorter delays during certain operations, and these are specified | |
158 | * separately from the standard mode delays. | |
159 | * | |
160 | * @block_delay - for standard SPI transactions consisting of both a read and | |
161 | * write operation, the delay (in microseconds) between the read and write | |
162 | * operations. | |
163 | * @split_read_block_delay_us - for V2 SPI transactions consisting of both a | |
164 | * read and write operation, the delay (in microseconds) between the read and | |
165 | * write operations. | |
166 | * @read_delay_us - the delay between each byte of a read operation in normal | |
167 | * SPI mode. | |
168 | * @write_delay_us - the delay between each byte of a write operation in normal | |
169 | * SPI mode. | |
170 | * @split_read_byte_delay_us - the delay between each byte of a read operation | |
171 | * in V2 mode. | |
172 | * @pre_delay_us - the delay before the start of a SPI transaction. This is | |
173 | * typically useful in conjunction with custom chip select assertions (see | |
174 | * below). | |
175 | * @post_delay_us - the delay after the completion of an SPI transaction. This | |
176 | * is typically useful in conjunction with custom chip select assertions (see | |
177 | * below). | |
178 | * @cs_assert - For systems where the SPI subsystem does not control the CS/SSB | |
179 | * line, or where such control is broken, you can provide a custom routine to | |
180 | * handle a GPIO as CS/SSB. This routine will be called at the beginning and | |
181 | * end of each SPI transaction. The RMI SPI implementation will wait | |
182 | * pre_delay_us after this routine returns before starting the SPI transfer; | |
183 | * and post_delay_us after completion of the SPI transfer(s) before calling it | |
184 | * with assert==FALSE. | |
185 | */ | |
186 | struct rmi_device_platform_data_spi { | |
187 | u32 block_delay_us; | |
188 | u32 split_read_block_delay_us; | |
189 | u32 read_delay_us; | |
190 | u32 write_delay_us; | |
191 | u32 split_read_byte_delay_us; | |
192 | u32 pre_delay_us; | |
193 | u32 post_delay_us; | |
194 | u8 bits_per_word; | |
195 | u16 mode; | |
196 | ||
197 | void *cs_assert_data; | |
198 | int (*cs_assert)(const void *cs_assert_data, const bool assert); | |
199 | }; | |
200 | ||
2b6a321d AD |
201 | /** |
202 | * struct rmi_device_platform_data - system specific configuration info. | |
203 | * | |
204 | * @reset_delay_ms - after issuing a reset command to the touch sensor, the | |
205 | * driver waits a few milliseconds to give the firmware a chance to | |
206 | * to re-initialize. You can override the default wait period here. | |
207 | */ | |
208 | struct rmi_device_platform_data { | |
209 | int reset_delay_ms; | |
210 | ||
8d99758d AD |
211 | struct rmi_device_platform_data_spi spi_data; |
212 | ||
2b6a321d | 213 | /* function handler pdata */ |
ff8f8370 | 214 | struct rmi_2d_sensor_platform_data *sensor_pdata; |
2b6a321d | 215 | struct rmi_f01_power_management power_management; |
562b42d3 | 216 | struct rmi_f30_data *f30_data; |
2b6a321d AD |
217 | }; |
218 | ||
219 | /** | |
220 | * struct rmi_function_descriptor - RMI function base addresses | |
221 | * | |
222 | * @query_base_addr: The RMI Query base address | |
223 | * @command_base_addr: The RMI Command base address | |
224 | * @control_base_addr: The RMI Control base address | |
225 | * @data_base_addr: The RMI Data base address | |
226 | * @interrupt_source_count: The number of irqs this RMI function needs | |
227 | * @function_number: The RMI function number | |
228 | * | |
229 | * This struct is used when iterating the Page Description Table. The addresses | |
230 | * are 16-bit values to include the current page address. | |
231 | * | |
232 | */ | |
233 | struct rmi_function_descriptor { | |
234 | u16 query_base_addr; | |
235 | u16 command_base_addr; | |
236 | u16 control_base_addr; | |
237 | u16 data_base_addr; | |
238 | u8 interrupt_source_count; | |
239 | u8 function_number; | |
240 | u8 function_version; | |
241 | }; | |
242 | ||
243 | struct rmi_device; | |
244 | ||
245 | /** | |
246 | * struct rmi_transport_dev - represent an RMI transport device | |
247 | * | |
248 | * @dev: Pointer to the communication device, e.g. i2c or spi | |
249 | * @rmi_dev: Pointer to the RMI device | |
250 | * @proto_name: name of the transport protocol (SPI, i2c, etc) | |
251 | * @ops: pointer to transport operations implementation | |
252 | * | |
253 | * The RMI transport device implements the glue between different communication | |
254 | * buses such as I2C and SPI. | |
255 | * | |
256 | */ | |
257 | struct rmi_transport_dev { | |
258 | struct device *dev; | |
259 | struct rmi_device *rmi_dev; | |
260 | ||
261 | const char *proto_name; | |
262 | const struct rmi_transport_ops *ops; | |
263 | ||
264 | struct rmi_device_platform_data pdata; | |
265 | ||
266 | struct input_dev *input; | |
267 | ||
268 | void *attn_data; | |
269 | int attn_size; | |
270 | }; | |
271 | ||
272 | /** | |
273 | * struct rmi_transport_ops - defines transport protocol operations. | |
274 | * | |
275 | * @write_block: Writing a block of data to the specified address | |
276 | * @read_block: Read a block of data from the specified address. | |
277 | */ | |
278 | struct rmi_transport_ops { | |
279 | int (*write_block)(struct rmi_transport_dev *xport, u16 addr, | |
280 | const void *buf, size_t len); | |
281 | int (*read_block)(struct rmi_transport_dev *xport, u16 addr, | |
282 | void *buf, size_t len); | |
283 | int (*reset)(struct rmi_transport_dev *xport, u16 reset_addr); | |
284 | }; | |
285 | ||
286 | /** | |
287 | * struct rmi_driver - driver for an RMI4 sensor on the RMI bus. | |
288 | * | |
289 | * @driver: Device driver model driver | |
290 | * @reset_handler: Called when a reset is detected. | |
291 | * @clear_irq_bits: Clear the specified bits in the current interrupt mask. | |
292 | * @set_irq_bist: Set the specified bits in the current interrupt mask. | |
293 | * @store_productid: Callback for cache product id from function 01 | |
294 | * @data: Private data pointer | |
295 | * | |
296 | */ | |
297 | struct rmi_driver { | |
298 | struct device_driver driver; | |
299 | ||
300 | int (*reset_handler)(struct rmi_device *rmi_dev); | |
301 | int (*clear_irq_bits)(struct rmi_device *rmi_dev, unsigned long *mask); | |
302 | int (*set_irq_bits)(struct rmi_device *rmi_dev, unsigned long *mask); | |
303 | int (*store_productid)(struct rmi_device *rmi_dev); | |
304 | int (*set_input_params)(struct rmi_device *rmi_dev, | |
305 | struct input_dev *input); | |
306 | void *data; | |
307 | }; | |
308 | ||
309 | /** | |
310 | * struct rmi_device - represents an RMI4 sensor device on the RMI bus. | |
311 | * | |
312 | * @dev: The device created for the RMI bus | |
313 | * @number: Unique number for the device on the bus. | |
314 | * @driver: Pointer to associated driver | |
315 | * @xport: Pointer to the transport interface | |
316 | * | |
317 | */ | |
318 | struct rmi_device { | |
319 | struct device dev; | |
320 | int number; | |
321 | ||
322 | struct rmi_driver *driver; | |
323 | struct rmi_transport_dev *xport; | |
324 | ||
325 | }; | |
326 | ||
327 | struct rmi_driver_data { | |
328 | struct list_head function_list; | |
329 | ||
330 | struct rmi_device *rmi_dev; | |
331 | ||
332 | struct rmi_function *f01_container; | |
333 | bool f01_bootloader_mode; | |
334 | ||
335 | u32 attn_count; | |
336 | int num_of_irq_regs; | |
337 | int irq_count; | |
338 | unsigned long *irq_status; | |
339 | unsigned long *fn_irq_bits; | |
340 | unsigned long *current_irq_mask; | |
341 | unsigned long *new_irq_mask; | |
342 | struct mutex irq_mutex; | |
343 | struct input_dev *input; | |
344 | ||
345 | u8 pdt_props; | |
346 | u8 bsr; | |
347 | ||
348 | bool enabled; | |
349 | ||
350 | void *data; | |
351 | }; | |
352 | ||
353 | int rmi_register_transport_device(struct rmi_transport_dev *xport); | |
354 | void rmi_unregister_transport_device(struct rmi_transport_dev *xport); | |
355 | int rmi_process_interrupt_requests(struct rmi_device *rmi_dev); | |
356 | ||
357 | int rmi_driver_suspend(struct rmi_device *rmi_dev); | |
358 | int rmi_driver_resume(struct rmi_device *rmi_dev); | |
359 | #endif |