Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
/*
 * Copyright (C) 2006-2012 Robert Gerlach <khnz@gmx.de>
 * Copyright (C) 2005-2006 Jan Rychter <jan@rychter.com>
 *
 * You can redistribute and/or modify this program under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/dmi.h>

#define MODULENAME "fujitsu-tablet"

#define ACPI_FUJITSU_CLASS "fujitsu"

#define INVERT_TABLET_MODE_BIT      0x01
#define INVERT_DOCK_STATE_BIT       0x02
#define FORCE_TABLET_MODE_IF_UNDOCK 0x04

#define KEYMAP_LEN 16

static const struct acpi_device_id fujitsu_ids[] = {
	{ .id = "FUJ02BD" },
	{ .id = "FUJ02BF" },
	{ .id = "" }
};

struct fujitsu_config {
	unsigned short keymap[KEYMAP_LEN];
	unsigned int quirks;
};

static unsigned short keymap_Lifebook_Tseries[KEYMAP_LEN] __initdata = {
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_SCROLLDOWN,
	KEY_SCROLLUP,
	KEY_DIRECTION,
	KEY_LEFTCTRL,
	KEY_BRIGHTNESSUP,
	KEY_BRIGHTNESSDOWN,
	KEY_BRIGHTNESS_ZERO,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_LEFTALT
};

static unsigned short keymap_Lifebook_U810[KEYMAP_LEN] __initdata = {
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_PROG1,
	KEY_PROG2,
	KEY_DIRECTION,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_UP,
	KEY_DOWN,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_LEFTCTRL,
	KEY_LEFTALT
};

static unsigned short keymap_Stylistic_Tseries[KEYMAP_LEN] __initdata = {
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_PRINT,
	KEY_BACKSPACE,
	KEY_SPACE,
	KEY_ENTER,
	KEY_BRIGHTNESSUP,
	KEY_BRIGHTNESSDOWN,
	KEY_DOWN,
	KEY_UP,
	KEY_SCROLLUP,
	KEY_SCROLLDOWN,
	KEY_LEFTCTRL,
	KEY_LEFTALT
};

static unsigned short keymap_Stylistic_ST5xxx[KEYMAP_LEN] __initdata = {
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_RESERVED,
	KEY_MAIL,
	KEY_DIRECTION,
	KEY_ESC,
	KEY_ENTER,
	KEY_BRIGHTNESSUP,
	KEY_BRIGHTNESSDOWN,
	KEY_DOWN,
	KEY_UP,
	KEY_SCROLLUP,
	KEY_SCROLLDOWN,
	KEY_LEFTCTRL,
	KEY_LEFTALT
};

static struct {
	struct input_dev *idev;
	struct fujitsu_config config;
	unsigned long prev_keymask;

	char phys[21];

	int irq;
	int io_base;
	int io_length;
} fujitsu;

static u8 fujitsu_ack(void)
{
	return inb(fujitsu.io_base + 2);
}

static u8 fujitsu_status(void)
{
	return inb(fujitsu.io_base + 6);
}

static u8 fujitsu_read_register(const u8 addr)
{
	outb(addr, fujitsu.io_base);
	return inb(fujitsu.io_base + 4);
}

static void fujitsu_send_state(void)
{
	int state;
	int dock, tablet_mode;

	state = fujitsu_read_register(0xdd);

	dock = state & 0x02;
	if (fujitsu.config.quirks & INVERT_DOCK_STATE_BIT)
		dock = !dock;

	if ((fujitsu.config.quirks & FORCE_TABLET_MODE_IF_UNDOCK) && (!dock)) {
		tablet_mode = 1;
	} else{
		tablet_mode = state & 0x01;
		if (fujitsu.config.quirks & INVERT_TABLET_MODE_BIT)
			tablet_mode = !tablet_mode;
	}

	input_report_switch(fujitsu.idev, SW_DOCK, dock);
	input_report_switch(fujitsu.idev, SW_TABLET_MODE, tablet_mode);
	input_sync(fujitsu.idev);
}

static void fujitsu_reset(void)
{
	int timeout = 50;

	fujitsu_ack();

	while ((fujitsu_status() & 0x02) && (--timeout))
		msleep(20);

	fujitsu_send_state();
}

static int input_fujitsu_setup(struct device *parent, const char *name,
			       const char *phys)
{
	struct input_dev *idev;
	int error;
	int i;

	idev = input_allocate_device();
	if (!idev)
		return -ENOMEM;

	idev->dev.parent = parent;
	idev->phys = phys;
	idev->name = name;
	idev->id.bustype = BUS_HOST;
	idev->id.vendor  = 0x1734;	/* Fujitsu Siemens Computer GmbH */
	idev->id.product = 0x0001;
	idev->id.version = 0x0101;

	idev->keycode = fujitsu.config.keymap;
	idev->keycodesize = sizeof(fujitsu.config.keymap[0]);
	idev->keycodemax = ARRAY_SIZE(fujitsu.config.keymap);

	__set_bit(EV_REP, idev->evbit);

	for (i = 0; i < ARRAY_SIZE(fujitsu.config.keymap); i++)
		if (fujitsu.config.keymap[i])
			input_set_capability(idev, EV_KEY, fujitsu.config.keymap[i]);

	input_set_capability(idev, EV_MSC, MSC_SCAN);

	input_set_capability(idev, EV_SW, SW_DOCK);
	input_set_capability(idev, EV_SW, SW_TABLET_MODE);

	error = input_register_device(idev);
	if (error) {
		input_free_device(idev);
		return error;
	}

	fujitsu.idev = idev;
	return 0;
}

static void input_fujitsu_remove(void)
{
	input_unregister_device(fujitsu.idev);
}

static irqreturn_t fujitsu_interrupt(int irq, void *dev_id)
{
	unsigned long keymask, changed;
	unsigned int keycode;
	int pressed;
	int i;

	if (unlikely(!(fujitsu_status() & 0x01)))
		return IRQ_NONE;

	fujitsu_send_state();

	keymask  = fujitsu_read_register(0xde);
	keymask |= fujitsu_read_register(0xdf) << 8;
	keymask ^= 0xffff;

	changed = keymask ^ fujitsu.prev_keymask;
	if (changed) {
		fujitsu.prev_keymask = keymask;

		for_each_set_bit(i, &changed, KEYMAP_LEN) {
			keycode = fujitsu.config.keymap[i];
			pressed = keymask & changed & BIT(i);

			if (pressed)
				input_event(fujitsu.idev, EV_MSC, MSC_SCAN, i);

			input_report_key(fujitsu.idev, keycode, pressed);
			input_sync(fujitsu.idev);
		}
	}

	fujitsu_ack();
	return IRQ_HANDLED;
}

static void fujitsu_dmi_common(const struct dmi_system_id *dmi)
{
	pr_info("%s\n", dmi->ident);
	memcpy(fujitsu.config.keymap, dmi->driver_data,
			sizeof(fujitsu.config.keymap));
}

static int fujitsu_dmi_lifebook(const struct dmi_system_id *dmi)
{
	fujitsu_dmi_common(dmi);
	fujitsu.config.quirks |= INVERT_TABLET_MODE_BIT;
	return 1;
}

static int fujitsu_dmi_stylistic(const struct dmi_system_id *dmi)
{
	fujitsu_dmi_common(dmi);
	fujitsu.config.quirks |= FORCE_TABLET_MODE_IF_UNDOCK;
	fujitsu.config.quirks |= INVERT_DOCK_STATE_BIT;
	return 1;
}

static const struct dmi_system_id dmi_ids[] __initconst = {
	{
		.callback = fujitsu_dmi_lifebook,
		.ident = "Fujitsu Siemens P/T Series",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK")
		},
		.driver_data = keymap_Lifebook_Tseries
	},
	{
		.callback = fujitsu_dmi_lifebook,
		.ident = "Fujitsu Lifebook T Series",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook T")
		},
		.driver_data = keymap_Lifebook_Tseries
	},
	{
		.callback = fujitsu_dmi_stylistic,
		.ident = "Fujitsu Siemens Stylistic T Series",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic T")
		},
		.driver_data = keymap_Stylistic_Tseries
	},
	{
		.callback = fujitsu_dmi_lifebook,
		.ident = "Fujitsu LifeBook U810",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook U810")
		},
		.driver_data = keymap_Lifebook_U810
	},
	{
		.callback = fujitsu_dmi_stylistic,
		.ident = "Fujitsu Siemens Stylistic ST5xxx Series",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "STYLISTIC ST5")
		},
		.driver_data = keymap_Stylistic_ST5xxx
	},
	{
		.callback = fujitsu_dmi_stylistic,
		.ident = "Fujitsu Siemens Stylistic ST5xxx Series",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic ST5")
		},
		.driver_data = keymap_Stylistic_ST5xxx
	},
	{
		.callback = fujitsu_dmi_lifebook,
		.ident = "Unknown (using defaults)",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, ""),
			DMI_MATCH(DMI_PRODUCT_NAME, "")
		},
		.driver_data = keymap_Lifebook_Tseries
	},
	{ NULL }
};

static acpi_status fujitsu_walk_resources(struct acpi_resource *res, void *data)
{
	switch (res->type) {
	case ACPI_RESOURCE_TYPE_IRQ:
		fujitsu.irq = res->data.irq.interrupts[0];
		return AE_OK;

	case ACPI_RESOURCE_TYPE_IO:
		fujitsu.io_base = res->data.io.minimum;
		fujitsu.io_length = res->data.io.address_length;
		return AE_OK;

	case ACPI_RESOURCE_TYPE_END_TAG:
		if (fujitsu.irq && fujitsu.io_base)
			return AE_OK;
		else
			return AE_NOT_FOUND;

	default:
		return AE_ERROR;
	}
}

static int acpi_fujitsu_add(struct acpi_device *adev)
{
	acpi_status status;
	int error;

	if (!adev)
		return -EINVAL;

	status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
			fujitsu_walk_resources, NULL);
	if (ACPI_FAILURE(status) || !fujitsu.irq || !fujitsu.io_base)
		return -ENODEV;

	sprintf(acpi_device_name(adev), "Fujitsu %s", acpi_device_hid(adev));
	sprintf(acpi_device_class(adev), "%s", ACPI_FUJITSU_CLASS);

	snprintf(fujitsu.phys, sizeof(fujitsu.phys),
			"%s/input0", acpi_device_hid(adev));

	error = input_fujitsu_setup(&adev->dev,
		acpi_device_name(adev), fujitsu.phys);
	if (error)
		return error;

	if (!request_region(fujitsu.io_base, fujitsu.io_length, MODULENAME)) {
		input_fujitsu_remove();
		return -EBUSY;
	}

	fujitsu_reset();

	error = request_irq(fujitsu.irq, fujitsu_interrupt,
			IRQF_SHARED, MODULENAME, fujitsu_interrupt);
	if (error) {
		release_region(fujitsu.io_base, fujitsu.io_length);
		input_fujitsu_remove();
		return error;
	}

	return 0;
}

static int acpi_fujitsu_remove(struct acpi_device *adev)
{
	free_irq(fujitsu.irq, fujitsu_interrupt);
	release_region(fujitsu.io_base, fujitsu.io_length);
	input_fujitsu_remove();
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int acpi_fujitsu_resume(struct device *dev)
{
	fujitsu_reset();
	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(acpi_fujitsu_pm, NULL, acpi_fujitsu_resume);

static struct acpi_driver acpi_fujitsu_driver = {
	.name  = MODULENAME,
	.class = "hotkey",
	.ids   = fujitsu_ids,
	.ops   = {
		.add    = acpi_fujitsu_add,
		.remove	= acpi_fujitsu_remove,
	},
	.drv.pm = &acpi_fujitsu_pm,
};

static int __init fujitsu_module_init(void)
{
	int error;

	dmi_check_system(dmi_ids);

	error = acpi_bus_register_driver(&acpi_fujitsu_driver);
	if (error)
		return error;

	return 0;
}

static void __exit fujitsu_module_exit(void)
{
	acpi_bus_unregister_driver(&acpi_fujitsu_driver);
}

module_init(fujitsu_module_init);
module_exit(fujitsu_module_exit);

MODULE_AUTHOR("Robert Gerlach <khnz@gmx.de>");
MODULE_DESCRIPTION("Fujitsu tablet pc extras driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("2.5");

MODULE_DEVICE_TABLE(acpi, fujitsu_ids);