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562b42d3 AD |
1 | /* |
2 | * Copyright (c) 2012-2016 Synaptics Incorporated | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License version 2 as published by | |
6 | * the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/rmi.h> | |
11 | #include <linux/input.h> | |
12 | #include <linux/slab.h> | |
13 | #include "rmi_driver.h" | |
14 | ||
15 | #define RMI_F30_QUERY_SIZE 2 | |
16 | ||
17 | /* Defs for Query 0 */ | |
18 | #define RMI_F30_EXTENDED_PATTERNS 0x01 | |
19 | #define RMI_F30_HAS_MAPPABLE_BUTTONS (1 << 1) | |
20 | #define RMI_F30_HAS_LED (1 << 2) | |
21 | #define RMI_F30_HAS_GPIO (1 << 3) | |
22 | #define RMI_F30_HAS_HAPTIC (1 << 4) | |
23 | #define RMI_F30_HAS_GPIO_DRV_CTL (1 << 5) | |
24 | #define RMI_F30_HAS_MECH_MOUSE_BTNS (1 << 6) | |
25 | ||
26 | /* Defs for Query 1 */ | |
27 | #define RMI_F30_GPIO_LED_COUNT 0x1F | |
28 | ||
29 | /* Defs for Control Registers */ | |
30 | #define RMI_F30_CTRL_1_GPIO_DEBOUNCE 0x01 | |
31 | #define RMI_F30_CTRL_1_HALT (1 << 4) | |
32 | #define RMI_F30_CTRL_1_HALTED (1 << 5) | |
33 | #define RMI_F30_CTRL_10_NUM_MECH_MOUSE_BTNS 0x03 | |
34 | ||
35 | struct rmi_f30_ctrl_data { | |
36 | int address; | |
37 | int length; | |
38 | u8 *regs; | |
39 | }; | |
40 | ||
41 | #define RMI_F30_CTRL_MAX_REGS 32 | |
42 | #define RMI_F30_CTRL_MAX_BYTES ((RMI_F30_CTRL_MAX_REGS + 7) >> 3) | |
43 | #define RMI_F30_CTRL_MAX_REG_BLOCKS 11 | |
44 | ||
45 | #define RMI_F30_CTRL_REGS_MAX_SIZE (RMI_F30_CTRL_MAX_BYTES \ | |
46 | + 1 \ | |
47 | + RMI_F30_CTRL_MAX_BYTES \ | |
48 | + RMI_F30_CTRL_MAX_BYTES \ | |
49 | + RMI_F30_CTRL_MAX_BYTES \ | |
50 | + 6 \ | |
51 | + RMI_F30_CTRL_MAX_REGS \ | |
52 | + RMI_F30_CTRL_MAX_REGS \ | |
53 | + RMI_F30_CTRL_MAX_BYTES \ | |
54 | + 1 \ | |
55 | + 1) | |
56 | ||
57 | struct f30_data { | |
58 | /* Query Data */ | |
59 | bool has_extended_pattern; | |
60 | bool has_mappable_buttons; | |
61 | bool has_led; | |
62 | bool has_gpio; | |
63 | bool has_haptic; | |
64 | bool has_gpio_driver_control; | |
65 | bool has_mech_mouse_btns; | |
66 | u8 gpioled_count; | |
67 | ||
68 | u8 register_count; | |
69 | ||
70 | /* Control Register Data */ | |
71 | struct rmi_f30_ctrl_data ctrl[RMI_F30_CTRL_MAX_REG_BLOCKS]; | |
72 | u8 ctrl_regs[RMI_F30_CTRL_REGS_MAX_SIZE]; | |
73 | u32 ctrl_regs_size; | |
74 | ||
75 | u8 data_regs[RMI_F30_CTRL_MAX_BYTES]; | |
76 | u16 *gpioled_key_map; | |
77 | ||
78 | struct input_dev *input; | |
79 | }; | |
80 | ||
81 | static int rmi_f30_read_control_parameters(struct rmi_function *fn, | |
82 | struct f30_data *f30) | |
83 | { | |
84 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
85 | int error = 0; | |
86 | ||
87 | error = rmi_read_block(rmi_dev, fn->fd.control_base_addr, | |
88 | f30->ctrl_regs, f30->ctrl_regs_size); | |
89 | if (error) { | |
90 | dev_err(&rmi_dev->dev, "%s : Could not read control registers at 0x%x error (%d)\n", | |
91 | __func__, fn->fd.control_base_addr, error); | |
92 | return error; | |
93 | } | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static int rmi_f30_attention(struct rmi_function *fn, unsigned long *irq_bits) | |
99 | { | |
100 | struct f30_data *f30 = dev_get_drvdata(&fn->dev); | |
101 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
ae9979c3 | 102 | struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev); |
562b42d3 AD |
103 | int retval; |
104 | int gpiled = 0; | |
105 | int value = 0; | |
106 | int i; | |
107 | int reg_num; | |
108 | ||
109 | if (!f30->input) | |
110 | return 0; | |
111 | ||
112 | /* Read the gpi led data. */ | |
ae9979c3 BT |
113 | if (drvdata->attn_data.data) { |
114 | if (drvdata->attn_data.size < f30->register_count) { | |
6d0dbeae AD |
115 | dev_warn(&fn->dev, "F30 interrupted, but data is missing\n"); |
116 | return 0; | |
117 | } | |
ae9979c3 | 118 | memcpy(f30->data_regs, drvdata->attn_data.data, |
562b42d3 | 119 | f30->register_count); |
ae9979c3 BT |
120 | drvdata->attn_data.data += f30->register_count; |
121 | drvdata->attn_data.size -= f30->register_count; | |
562b42d3 AD |
122 | } else { |
123 | retval = rmi_read_block(rmi_dev, fn->fd.data_base_addr, | |
124 | f30->data_regs, f30->register_count); | |
125 | ||
126 | if (retval) { | |
127 | dev_err(&fn->dev, "%s: Failed to read F30 data registers.\n", | |
128 | __func__); | |
129 | return retval; | |
130 | } | |
131 | } | |
132 | ||
133 | for (reg_num = 0; reg_num < f30->register_count; ++reg_num) { | |
134 | for (i = 0; gpiled < f30->gpioled_count && i < 8; ++i, | |
135 | ++gpiled) { | |
136 | if (f30->gpioled_key_map[gpiled] != 0) { | |
137 | /* buttons have pull up resistors */ | |
138 | value = (((f30->data_regs[reg_num] >> i) & 0x01) | |
139 | == 0); | |
140 | ||
141 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, | |
142 | "%s: call input report key (0x%04x) value (0x%02x)", | |
143 | __func__, | |
144 | f30->gpioled_key_map[gpiled], value); | |
145 | input_report_key(f30->input, | |
146 | f30->gpioled_key_map[gpiled], | |
147 | value); | |
148 | } | |
149 | ||
150 | } | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static int rmi_f30_register_device(struct rmi_function *fn) | |
157 | { | |
158 | int i; | |
159 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
160 | struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev); | |
161 | struct f30_data *f30 = dev_get_drvdata(&fn->dev); | |
162 | struct input_dev *input_dev; | |
163 | int button_count = 0; | |
164 | ||
165 | input_dev = drv_data->input; | |
166 | if (!input_dev) { | |
167 | dev_info(&fn->dev, "F30: no input device found, ignoring.\n"); | |
168 | return -EINVAL; | |
169 | } | |
170 | ||
171 | f30->input = input_dev; | |
172 | ||
173 | set_bit(EV_KEY, input_dev->evbit); | |
174 | ||
175 | input_dev->keycode = f30->gpioled_key_map; | |
176 | input_dev->keycodesize = sizeof(u16); | |
177 | input_dev->keycodemax = f30->gpioled_count; | |
178 | ||
179 | for (i = 0; i < f30->gpioled_count; i++) { | |
180 | if (f30->gpioled_key_map[i] != 0) { | |
181 | input_set_capability(input_dev, EV_KEY, | |
182 | f30->gpioled_key_map[i]); | |
183 | button_count++; | |
184 | } | |
185 | } | |
186 | ||
187 | if (button_count == 1) | |
188 | __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static int rmi_f30_config(struct rmi_function *fn) | |
193 | { | |
194 | struct f30_data *f30 = dev_get_drvdata(&fn->dev); | |
195 | struct rmi_driver *drv = fn->rmi_dev->driver; | |
196 | const struct rmi_device_platform_data *pdata = | |
197 | rmi_get_platform_data(fn->rmi_dev); | |
198 | int error; | |
199 | ||
0a135b88 | 200 | if (pdata->f30_data.disable) { |
562b42d3 AD |
201 | drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask); |
202 | } else { | |
203 | /* Write Control Register values back to device */ | |
204 | error = rmi_write_block(fn->rmi_dev, fn->fd.control_base_addr, | |
205 | f30->ctrl_regs, f30->ctrl_regs_size); | |
206 | if (error) { | |
207 | dev_err(&fn->rmi_dev->dev, | |
208 | "%s : Could not write control registers at 0x%x error (%d)\n", | |
209 | __func__, fn->fd.control_base_addr, error); | |
210 | return error; | |
211 | } | |
212 | ||
213 | drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static inline void rmi_f30_set_ctrl_data(struct rmi_f30_ctrl_data *ctrl, | |
219 | int *ctrl_addr, int len, u8 **reg) | |
220 | { | |
221 | ctrl->address = *ctrl_addr; | |
222 | ctrl->length = len; | |
223 | ctrl->regs = *reg; | |
224 | *ctrl_addr += len; | |
225 | *reg += len; | |
226 | } | |
227 | ||
228 | static inline bool rmi_f30_is_valid_button(int button, | |
229 | struct rmi_f30_ctrl_data *ctrl) | |
230 | { | |
231 | int byte_position = button >> 3; | |
232 | int bit_position = button & 0x07; | |
233 | ||
234 | /* | |
235 | * ctrl2 -> dir == 0 -> input mode | |
236 | * ctrl3 -> data == 1 -> actual button | |
237 | */ | |
238 | return !(ctrl[2].regs[byte_position] & BIT(bit_position)) && | |
239 | (ctrl[3].regs[byte_position] & BIT(bit_position)); | |
240 | } | |
241 | ||
242 | static inline int rmi_f30_initialize(struct rmi_function *fn) | |
243 | { | |
244 | struct f30_data *f30; | |
245 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
246 | const struct rmi_device_platform_data *pdata; | |
247 | int retval = 0; | |
248 | int control_address; | |
249 | int i; | |
250 | int button; | |
251 | u8 buf[RMI_F30_QUERY_SIZE]; | |
252 | u8 *ctrl_reg; | |
253 | u8 *map_memory; | |
254 | ||
255 | f30 = devm_kzalloc(&fn->dev, sizeof(struct f30_data), | |
256 | GFP_KERNEL); | |
257 | if (!f30) | |
258 | return -ENOMEM; | |
259 | ||
260 | dev_set_drvdata(&fn->dev, f30); | |
261 | ||
262 | retval = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr, buf, | |
263 | RMI_F30_QUERY_SIZE); | |
264 | ||
265 | if (retval) { | |
266 | dev_err(&fn->dev, "Failed to read query register.\n"); | |
267 | return retval; | |
268 | } | |
269 | ||
270 | f30->has_extended_pattern = buf[0] & RMI_F30_EXTENDED_PATTERNS; | |
271 | f30->has_mappable_buttons = buf[0] & RMI_F30_HAS_MAPPABLE_BUTTONS; | |
272 | f30->has_led = buf[0] & RMI_F30_HAS_LED; | |
273 | f30->has_gpio = buf[0] & RMI_F30_HAS_GPIO; | |
274 | f30->has_haptic = buf[0] & RMI_F30_HAS_HAPTIC; | |
275 | f30->has_gpio_driver_control = buf[0] & RMI_F30_HAS_GPIO_DRV_CTL; | |
276 | f30->has_mech_mouse_btns = buf[0] & RMI_F30_HAS_MECH_MOUSE_BTNS; | |
277 | f30->gpioled_count = buf[1] & RMI_F30_GPIO_LED_COUNT; | |
278 | ||
279 | f30->register_count = (f30->gpioled_count + 7) >> 3; | |
280 | ||
281 | control_address = fn->fd.control_base_addr; | |
282 | ctrl_reg = f30->ctrl_regs; | |
283 | ||
284 | if (f30->has_gpio && f30->has_led) | |
285 | rmi_f30_set_ctrl_data(&f30->ctrl[0], &control_address, | |
286 | f30->register_count, &ctrl_reg); | |
287 | ||
288 | rmi_f30_set_ctrl_data(&f30->ctrl[1], &control_address, sizeof(u8), | |
289 | &ctrl_reg); | |
290 | ||
291 | if (f30->has_gpio) { | |
292 | rmi_f30_set_ctrl_data(&f30->ctrl[2], &control_address, | |
293 | f30->register_count, &ctrl_reg); | |
294 | ||
295 | rmi_f30_set_ctrl_data(&f30->ctrl[3], &control_address, | |
296 | f30->register_count, &ctrl_reg); | |
297 | } | |
298 | ||
299 | if (f30->has_led) { | |
300 | int ctrl5_len; | |
301 | ||
302 | rmi_f30_set_ctrl_data(&f30->ctrl[4], &control_address, | |
303 | f30->register_count, &ctrl_reg); | |
304 | ||
305 | if (f30->has_extended_pattern) | |
306 | ctrl5_len = 6; | |
307 | else | |
308 | ctrl5_len = 2; | |
309 | ||
310 | rmi_f30_set_ctrl_data(&f30->ctrl[5], &control_address, | |
311 | ctrl5_len, &ctrl_reg); | |
312 | } | |
313 | ||
314 | if (f30->has_led || f30->has_gpio_driver_control) { | |
315 | /* control 6 uses a byte per gpio/led */ | |
316 | rmi_f30_set_ctrl_data(&f30->ctrl[6], &control_address, | |
317 | f30->gpioled_count, &ctrl_reg); | |
318 | } | |
319 | ||
320 | if (f30->has_mappable_buttons) { | |
321 | /* control 7 uses a byte per gpio/led */ | |
322 | rmi_f30_set_ctrl_data(&f30->ctrl[7], &control_address, | |
323 | f30->gpioled_count, &ctrl_reg); | |
324 | } | |
325 | ||
326 | if (f30->has_haptic) { | |
327 | rmi_f30_set_ctrl_data(&f30->ctrl[8], &control_address, | |
328 | f30->register_count, &ctrl_reg); | |
329 | ||
330 | rmi_f30_set_ctrl_data(&f30->ctrl[9], &control_address, | |
331 | sizeof(u8), &ctrl_reg); | |
332 | } | |
333 | ||
334 | if (f30->has_mech_mouse_btns) | |
335 | rmi_f30_set_ctrl_data(&f30->ctrl[10], &control_address, | |
336 | sizeof(u8), &ctrl_reg); | |
337 | ||
338 | f30->ctrl_regs_size = ctrl_reg - f30->ctrl_regs | |
339 | ?: RMI_F30_CTRL_REGS_MAX_SIZE; | |
340 | ||
341 | retval = rmi_f30_read_control_parameters(fn, f30); | |
342 | if (retval < 0) { | |
343 | dev_err(&fn->dev, | |
344 | "Failed to initialize F19 control params.\n"); | |
345 | return retval; | |
346 | } | |
347 | ||
348 | map_memory = devm_kzalloc(&fn->dev, | |
349 | (f30->gpioled_count * (sizeof(u16))), | |
350 | GFP_KERNEL); | |
351 | if (!map_memory) { | |
352 | dev_err(&fn->dev, "Failed to allocate gpioled map memory.\n"); | |
353 | return -ENOMEM; | |
354 | } | |
355 | ||
356 | f30->gpioled_key_map = (u16 *)map_memory; | |
357 | ||
358 | pdata = rmi_get_platform_data(rmi_dev); | |
0a135b88 | 359 | if (f30->has_gpio) { |
562b42d3 AD |
360 | button = BTN_LEFT; |
361 | for (i = 0; i < f30->gpioled_count; i++) { | |
362 | if (rmi_f30_is_valid_button(i, f30->ctrl)) { | |
363 | f30->gpioled_key_map[i] = button++; | |
364 | ||
365 | /* | |
366 | * buttonpad might be given by | |
367 | * f30->has_mech_mouse_btns, but I am | |
368 | * not sure, so use only the pdata info | |
369 | */ | |
0a135b88 | 370 | if (pdata->f30_data.buttonpad) |
562b42d3 AD |
371 | break; |
372 | } | |
373 | } | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int rmi_f30_probe(struct rmi_function *fn) | |
380 | { | |
381 | int rc; | |
382 | const struct rmi_device_platform_data *pdata = | |
383 | rmi_get_platform_data(fn->rmi_dev); | |
384 | ||
0a135b88 | 385 | if (pdata->f30_data.disable) |
562b42d3 AD |
386 | return 0; |
387 | ||
388 | rc = rmi_f30_initialize(fn); | |
389 | if (rc < 0) | |
390 | goto error_exit; | |
391 | ||
392 | rc = rmi_f30_register_device(fn); | |
393 | if (rc < 0) | |
394 | goto error_exit; | |
395 | ||
396 | return 0; | |
397 | ||
398 | error_exit: | |
399 | return rc; | |
400 | ||
401 | } | |
402 | ||
403 | struct rmi_function_handler rmi_f30_handler = { | |
404 | .driver = { | |
405 | .name = "rmi4_f30", | |
406 | }, | |
407 | .func = 0x30, | |
408 | .probe = rmi_f30_probe, | |
409 | .config = rmi_f30_config, | |
410 | .attention = rmi_f30_attention, | |
411 | }; |