blob: bb863e062b03b3cf66317c8899401478e2f06930 [file] [log] [blame]
Steve Twiss5179f0c2015-06-08 16:26:20 -07001/*
S Twissa27b5e02015-07-27 22:28:40 -07002 * OnKey device driver for DA9063 and DA9062 PMICs
Steve Twiss5179f0c2015-06-08 16:26:20 -07003 * Copyright (C) 2015 Dialog Semiconductor Ltd.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/module.h>
17#include <linux/errno.h>
18#include <linux/input.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21#include <linux/workqueue.h>
22#include <linux/regmap.h>
23#include <linux/of.h>
24#include <linux/mfd/da9063/core.h>
25#include <linux/mfd/da9063/pdata.h>
26#include <linux/mfd/da9063/registers.h>
S Twissa27b5e02015-07-27 22:28:40 -070027#include <linux/mfd/da9062/core.h>
28#include <linux/mfd/da9062/registers.h>
29
30struct da906x_chip_config {
31 /* REGS */
32 int onkey_status;
33 int onkey_pwr_signalling;
34 int onkey_fault_log;
35 int onkey_shutdown;
36 /* MASKS */
37 int onkey_nonkey_mask;
38 int onkey_nonkey_lock_mask;
39 int onkey_key_reset_mask;
40 int onkey_shutdown_mask;
41 /* NAMES */
42 const char *name;
43};
Steve Twiss5179f0c2015-06-08 16:26:20 -070044
45struct da9063_onkey {
Steve Twiss5179f0c2015-06-08 16:26:20 -070046 struct delayed_work work;
47 struct input_dev *input;
48 struct device *dev;
S Twissa27b5e02015-07-27 22:28:40 -070049 struct regmap *regmap;
50 const struct da906x_chip_config *config;
51 char phys[32];
Steve Twiss5179f0c2015-06-08 16:26:20 -070052 bool key_power;
53};
54
S Twissa27b5e02015-07-27 22:28:40 -070055static const struct da906x_chip_config da9063_regs = {
56 /* REGS */
57 .onkey_status = DA9063_REG_STATUS_A,
58 .onkey_pwr_signalling = DA9063_REG_CONTROL_B,
59 .onkey_fault_log = DA9063_REG_FAULT_LOG,
60 .onkey_shutdown = DA9063_REG_CONTROL_F,
61 /* MASKS */
62 .onkey_nonkey_mask = DA9063_NONKEY,
63 .onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
64 .onkey_key_reset_mask = DA9063_KEY_RESET,
65 .onkey_shutdown_mask = DA9063_SHUTDOWN,
66 /* NAMES */
67 .name = DA9063_DRVNAME_ONKEY,
68};
69
70static const struct da906x_chip_config da9062_regs = {
71 /* REGS */
72 .onkey_status = DA9062AA_STATUS_A,
73 .onkey_pwr_signalling = DA9062AA_CONTROL_B,
74 .onkey_fault_log = DA9062AA_FAULT_LOG,
75 .onkey_shutdown = DA9062AA_CONTROL_F,
76 /* MASKS */
77 .onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
78 .onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
79 .onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
80 .onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
81 /* NAMES */
82 .name = "da9062-onkey",
83};
84
85static const struct of_device_id da9063_compatible_reg_id_table[] = {
86 { .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
87 { .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
88 { },
89};
90
Steve Twiss5179f0c2015-06-08 16:26:20 -070091static void da9063_poll_on(struct work_struct *work)
92{
S Twissa27b5e02015-07-27 22:28:40 -070093 struct da9063_onkey *onkey = container_of(work,
94 struct da9063_onkey,
95 work.work);
96 const struct da906x_chip_config *config = onkey->config;
Steve Twiss5179f0c2015-06-08 16:26:20 -070097 unsigned int val;
98 int fault_log = 0;
99 bool poll = true;
100 int error;
101
102 /* Poll to see when the pin is released */
S Twissa27b5e02015-07-27 22:28:40 -0700103 error = regmap_read(onkey->regmap,
104 config->onkey_status,
105 &val);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700106 if (error) {
107 dev_err(onkey->dev,
108 "Failed to read ON status: %d\n", error);
109 goto err_poll;
110 }
111
S Twissa27b5e02015-07-27 22:28:40 -0700112 if (!(val & config->onkey_nonkey_mask)) {
113 error = regmap_update_bits(onkey->regmap,
114 config->onkey_pwr_signalling,
115 config->onkey_nonkey_lock_mask,
116 0);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700117 if (error) {
118 dev_err(onkey->dev,
119 "Failed to reset the Key Delay %d\n", error);
120 goto err_poll;
121 }
122
123 input_report_key(onkey->input, KEY_POWER, 0);
124 input_sync(onkey->input);
125
126 poll = false;
127 }
128
129 /*
130 * If the fault log KEY_RESET is detected, then clear it
131 * and shut down the system.
132 */
S Twissa27b5e02015-07-27 22:28:40 -0700133 error = regmap_read(onkey->regmap,
134 config->onkey_fault_log,
135 &fault_log);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700136 if (error) {
137 dev_warn(&onkey->input->dev,
138 "Cannot read FAULT_LOG: %d\n", error);
S Twissa27b5e02015-07-27 22:28:40 -0700139 } else if (fault_log & config->onkey_key_reset_mask) {
140 error = regmap_write(onkey->regmap,
141 config->onkey_fault_log,
142 config->onkey_key_reset_mask);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700143 if (error) {
144 dev_warn(&onkey->input->dev,
145 "Cannot reset KEY_RESET fault log: %d\n",
146 error);
147 } else {
148 /* at this point we do any S/W housekeeping
149 * and then send shutdown command
150 */
151 dev_dbg(&onkey->input->dev,
S Twissa27b5e02015-07-27 22:28:40 -0700152 "Sending SHUTDOWN to DA9063 ...\n");
153 error = regmap_write(onkey->regmap,
154 config->onkey_shutdown,
155 config->onkey_shutdown_mask);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700156 if (error)
157 dev_err(&onkey->input->dev,
158 "Cannot SHUTDOWN DA9063: %d\n",
159 error);
160 }
161 }
162
163err_poll:
164 if (poll)
165 schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
166}
167
168static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
169{
170 struct da9063_onkey *onkey = data;
S Twissa27b5e02015-07-27 22:28:40 -0700171 const struct da906x_chip_config *config = onkey->config;
Steve Twiss5179f0c2015-06-08 16:26:20 -0700172 unsigned int val;
173 int error;
174
S Twissa27b5e02015-07-27 22:28:40 -0700175 error = regmap_read(onkey->regmap,
176 config->onkey_status,
177 &val);
178 if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
Steve Twiss5179f0c2015-06-08 16:26:20 -0700179 input_report_key(onkey->input, KEY_POWER, 1);
180 input_sync(onkey->input);
181 schedule_delayed_work(&onkey->work, 0);
Steve Twissf889bea2015-12-12 20:43:35 -0800182 dev_dbg(onkey->dev, "KEY_POWER long press.\n");
Steve Twiss5179f0c2015-06-08 16:26:20 -0700183 } else {
Steve Twissf889bea2015-12-12 20:43:35 -0800184 input_report_key(onkey->input, KEY_POWER, 1);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700185 input_sync(onkey->input);
Steve Twissf889bea2015-12-12 20:43:35 -0800186 input_report_key(onkey->input, KEY_POWER, 0);
Steve Twiss5179f0c2015-06-08 16:26:20 -0700187 input_sync(onkey->input);
Steve Twissf889bea2015-12-12 20:43:35 -0800188 dev_dbg(onkey->dev, "KEY_POWER short press.\n");
Steve Twiss5179f0c2015-06-08 16:26:20 -0700189 }
190
191 return IRQ_HANDLED;
192}
193
194static void da9063_cancel_poll(void *data)
195{
196 struct da9063_onkey *onkey = data;
197
198 cancel_delayed_work_sync(&onkey->work);
199}
200
201static int da9063_onkey_probe(struct platform_device *pdev)
202{
203 struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
204 struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
205 struct da9063_onkey *onkey;
S Twissa27b5e02015-07-27 22:28:40 -0700206 const struct of_device_id *match;
Steve Twiss5179f0c2015-06-08 16:26:20 -0700207 int irq;
208 int error;
209
S Twissa27b5e02015-07-27 22:28:40 -0700210 match = of_match_node(da9063_compatible_reg_id_table,
211 pdev->dev.of_node);
212 if (!match)
213 return -ENXIO;
214
Steve Twiss5179f0c2015-06-08 16:26:20 -0700215 onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
216 GFP_KERNEL);
217 if (!onkey) {
218 dev_err(&pdev->dev, "Failed to allocate memory.\n");
219 return -ENOMEM;
220 }
221
S Twissa27b5e02015-07-27 22:28:40 -0700222 onkey->config = match->data;
Steve Twiss5179f0c2015-06-08 16:26:20 -0700223 onkey->dev = &pdev->dev;
S Twissa27b5e02015-07-27 22:28:40 -0700224
225 onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
226 if (!onkey->regmap) {
227 dev_err(&pdev->dev, "Parent regmap unavailable.\n");
228 return -ENXIO;
229 }
Steve Twiss5179f0c2015-06-08 16:26:20 -0700230
231 if (pdata)
232 onkey->key_power = pdata->key_power;
233 else
234 onkey->key_power =
235 !of_property_read_bool(pdev->dev.of_node,
236 "dlg,disable-key-power");
237
238 onkey->input = devm_input_allocate_device(&pdev->dev);
239 if (!onkey->input) {
240 dev_err(&pdev->dev, "Failed to allocated input device.\n");
241 return -ENOMEM;
242 }
243
S Twissa27b5e02015-07-27 22:28:40 -0700244 onkey->input->name = onkey->config->name;
245 snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
246 onkey->config->name);
247 onkey->input->phys = onkey->phys;
Steve Twiss5179f0c2015-06-08 16:26:20 -0700248 onkey->input->dev.parent = &pdev->dev;
249
250 if (onkey->key_power)
251 input_set_capability(onkey->input, EV_KEY, KEY_POWER);
252
253 input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
254
255 INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
256
257 error = devm_add_action(&pdev->dev, da9063_cancel_poll, onkey);
258 if (error) {
259 dev_err(&pdev->dev,
260 "Failed to add cancel poll action: %d\n",
261 error);
262 return error;
263 }
264
265 irq = platform_get_irq_byname(pdev, "ONKEY");
266 if (irq < 0) {
267 error = irq;
268 dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
269 return error;
270 }
271
272 error = devm_request_threaded_irq(&pdev->dev, irq,
273 NULL, da9063_onkey_irq_handler,
274 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
275 "ONKEY", onkey);
276 if (error) {
277 dev_err(&pdev->dev,
278 "Failed to request IRQ %d: %d\n", irq, error);
279 return error;
280 }
281
282 error = input_register_device(onkey->input);
283 if (error) {
284 dev_err(&pdev->dev,
285 "Failed to register input device: %d\n", error);
286 return error;
287 }
288
289 platform_set_drvdata(pdev, onkey);
290 return 0;
291}
292
293static struct platform_driver da9063_onkey_driver = {
294 .probe = da9063_onkey_probe,
295 .driver = {
296 .name = DA9063_DRVNAME_ONKEY,
S Twissa27b5e02015-07-27 22:28:40 -0700297 .of_match_table = da9063_compatible_reg_id_table,
Steve Twiss5179f0c2015-06-08 16:26:20 -0700298 },
299};
300module_platform_driver(da9063_onkey_driver);
301
302MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
S Twissa27b5e02015-07-27 22:28:40 -0700303MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063 and DA9062");
Steve Twiss5179f0c2015-06-08 16:26:20 -0700304MODULE_LICENSE("GPL");
305MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);