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19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/input.h>
23#include <linux/platform_device.h>
24#include <linux/input/sparse-keymap.h>
25#include <linux/acpi.h>
26#include <acpi/acpi_bus.h>
27
28MODULE_LICENSE("GPL");
29MODULE_AUTHOR("Alex Hung");
30
31static const struct acpi_device_id intel_hid_ids[] = {
32 {"INT33D5", 0},
33 {"", 0},
34};
35
36
37static const struct key_entry intel_hid_keymap[] = {
38
39
40 { KE_KEY, 3, { KEY_NUMLOCK } },
41 { KE_KEY, 4, { KEY_HOME } },
42 { KE_KEY, 5, { KEY_END } },
43 { KE_KEY, 6, { KEY_PAGEUP } },
44 { KE_KEY, 7, { KEY_PAGEDOWN } },
45 { KE_KEY, 8, { KEY_RFKILL } },
46 { KE_KEY, 9, { KEY_POWER } },
47 { KE_KEY, 11, { KEY_SLEEP } },
48
49 { KE_KEY, 14, { KEY_STOPCD } },
50 { KE_KEY, 15, { KEY_PLAYPAUSE } },
51 { KE_KEY, 16, { KEY_MUTE } },
52 { KE_KEY, 17, { KEY_VOLUMEUP } },
53 { KE_KEY, 18, { KEY_VOLUMEDOWN } },
54 { KE_KEY, 19, { KEY_BRIGHTNESSUP } },
55 { KE_KEY, 20, { KEY_BRIGHTNESSDOWN } },
56
57 { KE_END },
58};
59
60
61static const struct key_entry intel_array_keymap[] = {
62 { KE_KEY, 0xC2, { KEY_LEFTMETA } },
63 { KE_IGNORE, 0xC3, { KEY_LEFTMETA } },
64 { KE_KEY, 0xC4, { KEY_VOLUMEUP } },
65 { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } },
66 { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } },
67 { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } },
68 { KE_SW, 0xC8, { .sw = { SW_ROTATE_LOCK, 1 } } },
69 { KE_SW, 0xC9, { .sw = { SW_ROTATE_LOCK, 0 } } },
70 { KE_KEY, 0xCE, { KEY_POWER } },
71 { KE_IGNORE, 0xCF, { KEY_POWER } },
72 { KE_END },
73};
74
75struct intel_hid_priv {
76 struct input_dev *input_dev;
77 struct input_dev *array;
78};
79
80static int intel_hid_set_enable(struct device *device, bool enable)
81{
82 acpi_status status;
83
84 status = acpi_execute_simple_method(ACPI_HANDLE(device), "HDSM",
85 enable);
86 if (ACPI_FAILURE(status)) {
87 dev_warn(device, "failed to %sable hotkeys\n",
88 enable ? "en" : "dis");
89 return -EIO;
90 }
91
92 return 0;
93}
94
95static void intel_button_array_enable(struct device *device, bool enable)
96{
97 struct intel_hid_priv *priv = dev_get_drvdata(device);
98 acpi_handle handle = ACPI_HANDLE(device);
99 unsigned long long button_cap;
100 acpi_status status;
101
102 if (!priv->array)
103 return;
104
105
106 status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap);
107 if (ACPI_FAILURE(status)) {
108 dev_warn(device, "failed to get button capability\n");
109 return;
110 }
111
112
113 status = acpi_execute_simple_method(handle, "BTNE",
114 enable ? button_cap : 1);
115 if (ACPI_FAILURE(status))
116 dev_warn(device, "failed to set button capability\n");
117}
118
119static int intel_hid_pl_suspend_handler(struct device *device)
120{
121 intel_hid_set_enable(device, false);
122 intel_button_array_enable(device, false);
123
124 return 0;
125}
126
127static int intel_hid_pl_resume_handler(struct device *device)
128{
129 intel_hid_set_enable(device, true);
130 intel_button_array_enable(device, true);
131
132 return 0;
133}
134
135static const struct dev_pm_ops intel_hid_pl_pm_ops = {
136 .freeze = intel_hid_pl_suspend_handler,
137 .thaw = intel_hid_pl_resume_handler,
138 .restore = intel_hid_pl_resume_handler,
139 .suspend = intel_hid_pl_suspend_handler,
140 .resume = intel_hid_pl_resume_handler,
141};
142
143static int intel_hid_input_setup(struct platform_device *device)
144{
145 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
146 int ret;
147
148 priv->input_dev = devm_input_allocate_device(&device->dev);
149 if (!priv->input_dev)
150 return -ENOMEM;
151
152 ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL);
153 if (ret)
154 return ret;
155
156 priv->input_dev->name = "Intel HID events";
157 priv->input_dev->id.bustype = BUS_HOST;
158
159 return input_register_device(priv->input_dev);
160}
161
162static int intel_button_array_input_setup(struct platform_device *device)
163{
164 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
165 int ret;
166
167
168 priv->array = devm_input_allocate_device(&device->dev);
169 if (!priv->array)
170 return -ENOMEM;
171
172 ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL);
173 if (ret)
174 return ret;
175
176 priv->array->name = "Intel HID 5 button array";
177 priv->array->id.bustype = BUS_HOST;
178
179 return input_register_device(priv->array);
180}
181
182static void notify_handler(acpi_handle handle, u32 event, void *context)
183{
184 struct platform_device *device = context;
185 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
186 unsigned long long ev_index;
187 acpi_status status;
188
189
190 if (event != 0xc0) {
191 if (!priv->array ||
192 !sparse_keymap_report_event(priv->array, event, 1, true))
193 dev_info(&device->dev, "unknown event 0x%x\n", event);
194 return;
195 }
196
197 status = acpi_evaluate_integer(handle, "HDEM", NULL, &ev_index);
198 if (ACPI_FAILURE(status)) {
199 dev_warn(&device->dev, "failed to get event index\n");
200 return;
201 }
202
203 if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true))
204 dev_info(&device->dev, "unknown event index 0x%llx\n",
205 ev_index);
206}
207
208static int intel_hid_probe(struct platform_device *device)
209{
210 acpi_handle handle = ACPI_HANDLE(&device->dev);
211 unsigned long long event_cap, mode;
212 struct intel_hid_priv *priv;
213 acpi_status status;
214 int err;
215
216 status = acpi_evaluate_integer(handle, "HDMM", NULL, &mode);
217 if (ACPI_FAILURE(status)) {
218 dev_warn(&device->dev, "failed to read mode\n");
219 return -ENODEV;
220 }
221
222 if (mode != 0) {
223
224
225
226
227
228 dev_info(&device->dev, "platform is not in simple mode\n");
229 return -ENODEV;
230 }
231
232 priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
233 if (!priv)
234 return -ENOMEM;
235 dev_set_drvdata(&device->dev, priv);
236
237 err = intel_hid_input_setup(device);
238 if (err) {
239 pr_err("Failed to setup Intel HID hotkeys\n");
240 return err;
241 }
242
243
244 status = acpi_evaluate_integer(handle, "HEBC", NULL, &event_cap);
245 if (ACPI_SUCCESS(status) && (event_cap & 0x20000)) {
246 dev_info(&device->dev, "platform supports 5 button array\n");
247 err = intel_button_array_input_setup(device);
248 if (err)
249 pr_err("Failed to setup Intel 5 button array hotkeys\n");
250 }
251
252 status = acpi_install_notify_handler(handle,
253 ACPI_DEVICE_NOTIFY,
254 notify_handler,
255 device);
256 if (ACPI_FAILURE(status))
257 return -EBUSY;
258
259 err = intel_hid_set_enable(&device->dev, true);
260 if (err)
261 goto err_remove_notify;
262
263 if (priv->array) {
264 intel_button_array_enable(&device->dev, true);
265
266
267 status = acpi_evaluate_object(handle, "BTNL", NULL, NULL);
268 if (ACPI_FAILURE(status))
269 dev_warn(&device->dev,
270 "failed to enable HID power button\n");
271 }
272
273 return 0;
274
275err_remove_notify:
276 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
277
278 return err;
279}
280
281static int intel_hid_remove(struct platform_device *device)
282{
283 acpi_handle handle = ACPI_HANDLE(&device->dev);
284
285 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
286 intel_hid_set_enable(&device->dev, false);
287 intel_button_array_enable(&device->dev, false);
288
289
290
291
292
293 return 0;
294}
295
296static struct platform_driver intel_hid_pl_driver = {
297 .driver = {
298 .name = "intel-hid",
299 .acpi_match_table = intel_hid_ids,
300 .pm = &intel_hid_pl_pm_ops,
301 },
302 .probe = intel_hid_probe,
303 .remove = intel_hid_remove,
304};
305MODULE_DEVICE_TABLE(acpi, intel_hid_ids);
306
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315
316
317
318static acpi_status __init
319check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
320{
321 const struct acpi_device_id *ids = context;
322 struct acpi_device *dev;
323
324 if (acpi_bus_get_device(handle, &dev) != 0)
325 return AE_OK;
326
327 if (acpi_match_device_ids(dev, ids) == 0)
328 if (acpi_create_platform_device(dev, NULL))
329 dev_info(&dev->dev,
330 "intel-hid: created platform device\n");
331
332 return AE_OK;
333}
334
335static int __init intel_hid_init(void)
336{
337 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
338 ACPI_UINT32_MAX, check_acpi_dev, NULL,
339 (void *)intel_hid_ids, NULL);
340
341 return platform_driver_register(&intel_hid_pl_driver);
342}
343module_init(intel_hid_init);
344
345static void __exit intel_hid_exit(void)
346{
347 platform_driver_unregister(&intel_hid_pl_driver);
348}
349module_exit(intel_hid_exit);
350