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1/*
2 * chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
3 *
4 * Author : Benson Leung <bleung@chromium.org>
5 *
6 * Copyright (C) 2012 Google, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/dmi.h>
25#include <linux/i2c.h>
26#include <linux/platform_data/atmel_mxt_ts.h>
27#include <linux/input.h>
28#include <linux/interrupt.h>
29#include <linux/module.h>
30#include <linux/platform_device.h>
31
32#define ATMEL_TP_I2C_ADDR 0x4b
33#define ATMEL_TP_I2C_BL_ADDR 0x25
34#define ATMEL_TS_I2C_ADDR 0x4a
35#define ATMEL_TS_I2C_BL_ADDR 0x26
36#define CYAPA_TP_I2C_ADDR 0x67
37#define ISL_ALS_I2C_ADDR 0x44
38#define TAOS_ALS_I2C_ADDR 0x29
39
40#define MAX_I2C_DEVICE_DEFERRALS 5
41
42static struct i2c_client *als;
43static struct i2c_client *tp;
44static struct i2c_client *ts;
45
46static const char *i2c_adapter_names[] = {
47 "SMBus I801 adapter",
48 "i915 gmbus vga",
49 "i915 gmbus panel",
50 "Synopsys DesignWare I2C adapter",
51 "Synopsys DesignWare I2C adapter",
52};
53
54/* Keep this enum consistent with i2c_adapter_names */
55enum i2c_adapter_type {
56 I2C_ADAPTER_SMBUS = 0,
57 I2C_ADAPTER_VGADDC,
58 I2C_ADAPTER_PANEL,
59 I2C_ADAPTER_DESIGNWARE_0,
60 I2C_ADAPTER_DESIGNWARE_1,
61};
62
63enum i2c_peripheral_state {
64 UNPROBED = 0,
65 PROBED,
66 TIMEDOUT,
67};
68
69struct i2c_peripheral {
70 int (*add)(enum i2c_adapter_type type);
71 enum i2c_adapter_type type;
72 enum i2c_peripheral_state state;
73 int tries;
74};
75
76#define MAX_I2C_PERIPHERALS 3
77
78struct chromeos_laptop {
79 struct i2c_peripheral i2c_peripherals[MAX_I2C_PERIPHERALS];
80};
81
82static struct chromeos_laptop *cros_laptop;
83
84static struct i2c_board_info cyapa_device = {
85 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
86 .flags = I2C_CLIENT_WAKE,
87};
88
89static struct i2c_board_info isl_als_device = {
90 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
91};
92
93static struct i2c_board_info tsl2583_als_device = {
94 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
95};
96
97static struct i2c_board_info tsl2563_als_device = {
98 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
99};
100
101static int mxt_t19_keys[] = {
102 KEY_RESERVED,
103 KEY_RESERVED,
104 KEY_RESERVED,
105 KEY_RESERVED,
106 KEY_RESERVED,
107 BTN_LEFT
108};
109
110static struct mxt_platform_data atmel_224s_tp_platform_data = {
111 .irqflags = IRQF_TRIGGER_FALLING,
112 .t19_num_keys = ARRAY_SIZE(mxt_t19_keys),
113 .t19_keymap = mxt_t19_keys,
114 .suspend_mode = MXT_SUSPEND_T9_CTRL,
115};
116
117static struct i2c_board_info atmel_224s_tp_device = {
118 I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
119 .platform_data = &atmel_224s_tp_platform_data,
120 .flags = I2C_CLIENT_WAKE,
121};
122
123static struct mxt_platform_data atmel_1664s_platform_data = {
124 .irqflags = IRQF_TRIGGER_FALLING,
125 .suspend_mode = MXT_SUSPEND_T9_CTRL,
126};
127
128static struct i2c_board_info atmel_1664s_device = {
129 I2C_BOARD_INFO("atmel_mxt_ts", ATMEL_TS_I2C_ADDR),
130 .platform_data = &atmel_1664s_platform_data,
131 .flags = I2C_CLIENT_WAKE,
132};
133
134static struct i2c_client *__add_probed_i2c_device(
135 const char *name,
136 int bus,
137 struct i2c_board_info *info,
138 const unsigned short *alt_addr_list)
139{
140 const struct dmi_device *dmi_dev;
141 const struct dmi_dev_onboard *dev_data;
142 struct i2c_adapter *adapter;
143 struct i2c_client *client = NULL;
144 const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
145
146 if (bus < 0)
147 return NULL;
148 /*
149 * If a name is specified, look for irq platform information stashed
150 * in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware.
151 */
152 if (name) {
153 dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
154 if (!dmi_dev) {
155 pr_err("%s failed to dmi find device %s.\n",
156 __func__,
157 name);
158 return NULL;
159 }
160 dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
161 if (!dev_data) {
162 pr_err("%s failed to get data from dmi for %s.\n",
163 __func__, name);
164 return NULL;
165 }
166 info->irq = dev_data->instance;
167 }
168
169 adapter = i2c_get_adapter(bus);
170 if (!adapter) {
171 pr_err("%s failed to get i2c adapter %d.\n", __func__, bus);
172 return NULL;
173 }
174
175 /*
176 * Add the i2c device. If we can't detect it at the primary
177 * address we scan secondary addresses. In any case the client
178 * structure gets assigned primary address.
179 */
180 client = i2c_new_probed_device(adapter, info, addr_list, NULL);
181 if (!client && alt_addr_list) {
182 struct i2c_board_info dummy_info = {
183 I2C_BOARD_INFO("dummy", info->addr),
184 };
185 struct i2c_client *dummy;
186
187 dummy = i2c_new_probed_device(adapter, &dummy_info,
188 alt_addr_list, NULL);
189 if (dummy) {
190 pr_debug("%s %d-%02x is probed at %02x\n",
191 __func__, bus, info->addr, dummy->addr);
192 i2c_unregister_device(dummy);
193 client = i2c_new_device(adapter, info);
194 }
195 }
196
197 if (!client)
198 pr_notice("%s failed to register device %d-%02x\n",
199 __func__, bus, info->addr);
200 else
201 pr_debug("%s added i2c device %d-%02x\n",
202 __func__, bus, info->addr);
203
204 i2c_put_adapter(adapter);
205 return client;
206}
207
208struct i2c_lookup {
209 const char *name;
210 int instance;
211 int n;
212};
213
214static int __find_i2c_adap(struct device *dev, void *data)
215{
216 struct i2c_lookup *lookup = data;
217 static const char *prefix = "i2c-";
218 struct i2c_adapter *adapter;
219
220 if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
221 return 0;
222 adapter = to_i2c_adapter(dev);
223 if (strncmp(adapter->name, lookup->name, strlen(lookup->name)) == 0 &&
224 lookup->n++ == lookup->instance)
225 return 1;
226 return 0;
227}
228
229static int find_i2c_adapter_num(enum i2c_adapter_type type)
230{
231 struct device *dev = NULL;
232 struct i2c_adapter *adapter;
233 struct i2c_lookup lookup;
234
235 memset(&lookup, 0, sizeof(lookup));
236 lookup.name = i2c_adapter_names[type];
237 lookup.instance = (type == I2C_ADAPTER_DESIGNWARE_1) ? 1 : 0;
238
239 /* find the adapter by name */
240 dev = bus_find_device(&i2c_bus_type, NULL, &lookup, __find_i2c_adap);
241 if (!dev) {
242 /* Adapters may appear later. Deferred probing will retry */
243 pr_notice("%s: i2c adapter %s not found on system.\n", __func__,
244 lookup.name);
245 return -ENODEV;
246 }
247 adapter = to_i2c_adapter(dev);
248 return adapter->nr;
249}
250
251/*
252 * Takes a list of addresses in addrs as such :
253 * { addr1, ... , addrn, I2C_CLIENT_END };
254 * add_probed_i2c_device will use i2c_new_probed_device
255 * and probe for devices at all of the addresses listed.
256 * Returns NULL if no devices found.
257 * See Documentation/i2c/instantiating-devices for more information.
258 */
259static struct i2c_client *add_probed_i2c_device(
260 const char *name,
261 enum i2c_adapter_type type,
262 struct i2c_board_info *info,
263 const unsigned short *addrs)
264{
265 return __add_probed_i2c_device(name,
266 find_i2c_adapter_num(type),
267 info,
268 addrs);
269}
270
271/*
272 * Probes for a device at a single address, the one provided by
273 * info->addr.
274 * Returns NULL if no device found.
275 */
276static struct i2c_client *add_i2c_device(const char *name,
277 enum i2c_adapter_type type,
278 struct i2c_board_info *info)
279{
280 return __add_probed_i2c_device(name,
281 find_i2c_adapter_num(type),
282 info,
283 NULL);
284}
285
286static int setup_cyapa_tp(enum i2c_adapter_type type)
287{
288 if (tp)
289 return 0;
290
291 /* add cyapa touchpad */
292 tp = add_i2c_device("trackpad", type, &cyapa_device);
293 return (!tp) ? -EAGAIN : 0;
294}
295
296static int setup_atmel_224s_tp(enum i2c_adapter_type type)
297{
298 const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
299 I2C_CLIENT_END };
300 if (tp)
301 return 0;
302
303 /* add atmel mxt touchpad */
304 tp = add_probed_i2c_device("trackpad", type,
305 &atmel_224s_tp_device, addr_list);
306 return (!tp) ? -EAGAIN : 0;
307}
308
309static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
310{
311 const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
312 I2C_CLIENT_END };
313 if (ts)
314 return 0;
315
316 /* add atmel mxt touch device */
317 ts = add_probed_i2c_device("touchscreen", type,
318 &atmel_1664s_device, addr_list);
319 return (!ts) ? -EAGAIN : 0;
320}
321
322static int setup_isl29018_als(enum i2c_adapter_type type)
323{
324 if (als)
325 return 0;
326
327 /* add isl29018 light sensor */
328 als = add_i2c_device("lightsensor", type, &isl_als_device);
329 return (!als) ? -EAGAIN : 0;
330}
331
332static int setup_tsl2583_als(enum i2c_adapter_type type)
333{
334 if (als)
335 return 0;
336
337 /* add tsl2583 light sensor */
338 als = add_i2c_device(NULL, type, &tsl2583_als_device);
339 return (!als) ? -EAGAIN : 0;
340}
341
342static int setup_tsl2563_als(enum i2c_adapter_type type)
343{
344 if (als)
345 return 0;
346
347 /* add tsl2563 light sensor */
348 als = add_i2c_device(NULL, type, &tsl2563_als_device);
349 return (!als) ? -EAGAIN : 0;
350}
351
352static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
353{
354 cros_laptop = (void *)id->driver_data;
355 pr_debug("DMI Matched %s.\n", id->ident);
356
357 /* Indicate to dmi_scan that processing is done. */
358 return 1;
359}
360
361static int chromeos_laptop_probe(struct platform_device *pdev)
362{
363 int i;
364 int ret = 0;
365
366 for (i = 0; i < MAX_I2C_PERIPHERALS; i++) {
367 struct i2c_peripheral *i2c_dev;
368
369 i2c_dev = &cros_laptop->i2c_peripherals[i];
370
371 /* No more peripherals. */
372 if (i2c_dev->add == NULL)
373 break;
374
375 if (i2c_dev->state == TIMEDOUT || i2c_dev->state == PROBED)
376 continue;
377
378 /*
379 * Check that the i2c adapter is present.
380 * -EPROBE_DEFER if missing as the adapter may appear much
381 * later.
382 */
383 if (find_i2c_adapter_num(i2c_dev->type) == -ENODEV) {
384 ret = -EPROBE_DEFER;
385 continue;
386 }
387
388 /* Add the device. */
389 if (i2c_dev->add(i2c_dev->type) == -EAGAIN) {
390 /*
391 * Set -EPROBE_DEFER a limited num of times
392 * if device is not successfully added.
393 */
394 if (++i2c_dev->tries < MAX_I2C_DEVICE_DEFERRALS) {
395 ret = -EPROBE_DEFER;
396 } else {
397 /* Ran out of tries. */
398 pr_notice("%s: Ran out of tries for device.\n",
399 __func__);
400 i2c_dev->state = TIMEDOUT;
401 }
402 } else {
403 i2c_dev->state = PROBED;
404 }
405 }
406
407 return ret;
408}
409
410static struct chromeos_laptop samsung_series_5_550 = {
411 .i2c_peripherals = {
412 /* Touchpad. */
413 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
414 /* Light Sensor. */
415 { .add = setup_isl29018_als, I2C_ADAPTER_SMBUS },
416 },
417};
418
419static struct chromeos_laptop samsung_series_5 = {
420 .i2c_peripherals = {
421 /* Light Sensor. */
422 { .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
423 },
424};
425
426static struct chromeos_laptop chromebook_pixel = {
427 .i2c_peripherals = {
428 /* Touch Screen. */
429 { .add = setup_atmel_1664s_ts, I2C_ADAPTER_PANEL },
430 /* Touchpad. */
431 { .add = setup_atmel_224s_tp, I2C_ADAPTER_VGADDC },
432 /* Light Sensor. */
433 { .add = setup_isl29018_als, I2C_ADAPTER_PANEL },
434 },
435};
436
437static struct chromeos_laptop hp_chromebook_14 = {
438 .i2c_peripherals = {
439 /* Touchpad. */
440 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
441 },
442};
443
444static struct chromeos_laptop dell_chromebook_11 = {
445 .i2c_peripherals = {
446 /* Touchpad. */
447 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
448 },
449};
450
451static struct chromeos_laptop toshiba_cb35 = {
452 .i2c_peripherals = {
453 /* Touchpad. */
454 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
455 },
456};
457
458static struct chromeos_laptop acer_c7_chromebook = {
459 .i2c_peripherals = {
460 /* Touchpad. */
461 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
462 },
463};
464
465static struct chromeos_laptop acer_ac700 = {
466 .i2c_peripherals = {
467 /* Light Sensor. */
468 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
469 },
470};
471
472static struct chromeos_laptop acer_c720 = {
473 .i2c_peripherals = {
474 /* Touchscreen. */
475 { .add = setup_atmel_1664s_ts, I2C_ADAPTER_DESIGNWARE_1 },
476 /* Touchpad. */
477 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
478 /* Light Sensor. */
479 { .add = setup_isl29018_als, I2C_ADAPTER_DESIGNWARE_1 },
480 },
481};
482
483static struct chromeos_laptop hp_pavilion_14_chromebook = {
484 .i2c_peripherals = {
485 /* Touchpad. */
486 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
487 },
488};
489
490static struct chromeos_laptop cr48 = {
491 .i2c_peripherals = {
492 /* Light Sensor. */
493 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
494 },
495};
496
497#define _CBDD(board_) \
498 .callback = chromeos_laptop_dmi_matched, \
499 .driver_data = (void *)&board_
500
501static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
502 {
503 .ident = "Samsung Series 5 550",
504 .matches = {
505 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
506 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
507 },
508 _CBDD(samsung_series_5_550),
509 },
510 {
511 .ident = "Samsung Series 5",
512 .matches = {
513 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
514 },
515 _CBDD(samsung_series_5),
516 },
517 {
518 .ident = "Chromebook Pixel",
519 .matches = {
520 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
521 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
522 },
523 _CBDD(chromebook_pixel),
524 },
525 {
526 .ident = "Wolf",
527 .matches = {
528 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
529 DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
530 },
531 _CBDD(dell_chromebook_11),
532 },
533 {
534 .ident = "HP Chromebook 14",
535 .matches = {
536 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
537 DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
538 },
539 _CBDD(hp_chromebook_14),
540 },
541 {
542 .ident = "Toshiba CB35",
543 .matches = {
544 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
545 DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
546 },
547 _CBDD(toshiba_cb35),
548 },
549 {
550 .ident = "Acer C7 Chromebook",
551 .matches = {
552 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
553 },
554 _CBDD(acer_c7_chromebook),
555 },
556 {
557 .ident = "Acer AC700",
558 .matches = {
559 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
560 },
561 _CBDD(acer_ac700),
562 },
563 {
564 .ident = "Acer C720",
565 .matches = {
566 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
567 },
568 _CBDD(acer_c720),
569 },
570 {
571 .ident = "HP Pavilion 14 Chromebook",
572 .matches = {
573 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
574 },
575 _CBDD(hp_pavilion_14_chromebook),
576 },
577 {
578 .ident = "Cr-48",
579 .matches = {
580 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
581 },
582 _CBDD(cr48),
583 },
584 { }
585};
586MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
587
588static struct platform_device *cros_platform_device;
589
590static struct platform_driver cros_platform_driver = {
591 .driver = {
592 .name = "chromeos_laptop",
593 },
594 .probe = chromeos_laptop_probe,
595};
596
597static int __init chromeos_laptop_init(void)
598{
599 int ret;
600
601 if (!dmi_check_system(chromeos_laptop_dmi_table)) {
602 pr_debug("%s unsupported system.\n", __func__);
603 return -ENODEV;
604 }
605
606 ret = platform_driver_register(&cros_platform_driver);
607 if (ret)
608 return ret;
609
610 cros_platform_device = platform_device_alloc("chromeos_laptop", -1);
611 if (!cros_platform_device) {
612 ret = -ENOMEM;
613 goto fail_platform_device1;
614 }
615
616 ret = platform_device_add(cros_platform_device);
617 if (ret)
618 goto fail_platform_device2;
619
620 return 0;
621
622fail_platform_device2:
623 platform_device_put(cros_platform_device);
624fail_platform_device1:
625 platform_driver_unregister(&cros_platform_driver);
626 return ret;
627}
628
629static void __exit chromeos_laptop_exit(void)
630{
631 if (als)
632 i2c_unregister_device(als);
633 if (tp)
634 i2c_unregister_device(tp);
635 if (ts)
636 i2c_unregister_device(ts);
637
638 platform_device_unregister(cros_platform_device);
639 platform_driver_unregister(&cros_platform_driver);
640}
641
642module_init(chromeos_laptop_init);
643module_exit(chromeos_laptop_exit);
644
645MODULE_DESCRIPTION("Chrome OS Laptop driver");
646MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
647MODULE_LICENSE("GPL");
1/*
2 * chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
3 *
4 * Author : Benson Leung <bleung@chromium.org>
5 *
6 * Copyright (C) 2012 Google, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <linux/dmi.h>
25#include <linux/i2c.h>
26#include <linux/i2c/atmel_mxt_ts.h>
27#include <linux/input.h>
28#include <linux/interrupt.h>
29#include <linux/module.h>
30#include <linux/platform_device.h>
31
32#define ATMEL_TP_I2C_ADDR 0x4b
33#define ATMEL_TP_I2C_BL_ADDR 0x25
34#define ATMEL_TS_I2C_ADDR 0x4a
35#define ATMEL_TS_I2C_BL_ADDR 0x26
36#define CYAPA_TP_I2C_ADDR 0x67
37#define ISL_ALS_I2C_ADDR 0x44
38#define TAOS_ALS_I2C_ADDR 0x29
39
40static struct i2c_client *als;
41static struct i2c_client *tp;
42static struct i2c_client *ts;
43
44static const char *i2c_adapter_names[] = {
45 "SMBus I801 adapter",
46 "i915 gmbus vga",
47 "i915 gmbus panel",
48};
49
50/* Keep this enum consistent with i2c_adapter_names */
51enum i2c_adapter_type {
52 I2C_ADAPTER_SMBUS = 0,
53 I2C_ADAPTER_VGADDC,
54 I2C_ADAPTER_PANEL,
55};
56
57struct i2c_peripheral {
58 int (*add)(enum i2c_adapter_type type);
59 enum i2c_adapter_type type;
60};
61
62#define MAX_I2C_PERIPHERALS 3
63
64struct chromeos_laptop {
65 struct i2c_peripheral i2c_peripherals[MAX_I2C_PERIPHERALS];
66};
67
68static struct chromeos_laptop *cros_laptop;
69
70static struct i2c_board_info cyapa_device = {
71 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
72 .flags = I2C_CLIENT_WAKE,
73};
74
75static struct i2c_board_info isl_als_device = {
76 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
77};
78
79static struct i2c_board_info tsl2583_als_device = {
80 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
81};
82
83static struct i2c_board_info tsl2563_als_device = {
84 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
85};
86
87static struct mxt_platform_data atmel_224s_tp_platform_data = {
88 .x_line = 18,
89 .y_line = 12,
90 .x_size = 102*20,
91 .y_size = 68*20,
92 .blen = 0x80, /* Gain setting is in upper 4 bits */
93 .threshold = 0x32,
94 .voltage = 0, /* 3.3V */
95 .orient = MXT_VERTICAL_FLIP,
96 .irqflags = IRQF_TRIGGER_FALLING,
97 .is_tp = true,
98 .key_map = { KEY_RESERVED,
99 KEY_RESERVED,
100 KEY_RESERVED,
101 BTN_LEFT },
102 .config = NULL,
103 .config_length = 0,
104};
105
106static struct i2c_board_info atmel_224s_tp_device = {
107 I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
108 .platform_data = &atmel_224s_tp_platform_data,
109 .flags = I2C_CLIENT_WAKE,
110};
111
112static struct mxt_platform_data atmel_1664s_platform_data = {
113 .x_line = 32,
114 .y_line = 50,
115 .x_size = 1700,
116 .y_size = 2560,
117 .blen = 0x89, /* Gain setting is in upper 4 bits */
118 .threshold = 0x28,
119 .voltage = 0, /* 3.3V */
120 .orient = MXT_ROTATED_90_COUNTER,
121 .irqflags = IRQF_TRIGGER_FALLING,
122 .is_tp = false,
123 .config = NULL,
124 .config_length = 0,
125};
126
127static struct i2c_board_info atmel_1664s_device = {
128 I2C_BOARD_INFO("atmel_mxt_ts", ATMEL_TS_I2C_ADDR),
129 .platform_data = &atmel_1664s_platform_data,
130 .flags = I2C_CLIENT_WAKE,
131};
132
133static struct i2c_client *__add_probed_i2c_device(
134 const char *name,
135 int bus,
136 struct i2c_board_info *info,
137 const unsigned short *addrs)
138{
139 const struct dmi_device *dmi_dev;
140 const struct dmi_dev_onboard *dev_data;
141 struct i2c_adapter *adapter;
142 struct i2c_client *client;
143
144 if (bus < 0)
145 return NULL;
146 /*
147 * If a name is specified, look for irq platform information stashed
148 * in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware.
149 */
150 if (name) {
151 dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
152 if (!dmi_dev) {
153 pr_err("%s failed to dmi find device %s.\n",
154 __func__,
155 name);
156 return NULL;
157 }
158 dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
159 if (!dev_data) {
160 pr_err("%s failed to get data from dmi for %s.\n",
161 __func__, name);
162 return NULL;
163 }
164 info->irq = dev_data->instance;
165 }
166
167 adapter = i2c_get_adapter(bus);
168 if (!adapter) {
169 pr_err("%s failed to get i2c adapter %d.\n", __func__, bus);
170 return NULL;
171 }
172
173 /* add the i2c device */
174 client = i2c_new_probed_device(adapter, info, addrs, NULL);
175 if (!client)
176 pr_err("%s failed to register device %d-%02x\n",
177 __func__, bus, info->addr);
178 else
179 pr_debug("%s added i2c device %d-%02x\n",
180 __func__, bus, info->addr);
181
182 i2c_put_adapter(adapter);
183 return client;
184}
185
186static int __find_i2c_adap(struct device *dev, void *data)
187{
188 const char *name = data;
189 static const char *prefix = "i2c-";
190 struct i2c_adapter *adapter;
191 if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
192 return 0;
193 adapter = to_i2c_adapter(dev);
194 return (strncmp(adapter->name, name, strlen(name)) == 0);
195}
196
197static int find_i2c_adapter_num(enum i2c_adapter_type type)
198{
199 struct device *dev = NULL;
200 struct i2c_adapter *adapter;
201 const char *name = i2c_adapter_names[type];
202 /* find the adapter by name */
203 dev = bus_find_device(&i2c_bus_type, NULL, (void *)name,
204 __find_i2c_adap);
205 if (!dev) {
206 /* Adapters may appear later. Deferred probing will retry */
207 pr_notice("%s: i2c adapter %s not found on system.\n", __func__,
208 name);
209 return -ENODEV;
210 }
211 adapter = to_i2c_adapter(dev);
212 return adapter->nr;
213}
214
215/*
216 * Takes a list of addresses in addrs as such :
217 * { addr1, ... , addrn, I2C_CLIENT_END };
218 * add_probed_i2c_device will use i2c_new_probed_device
219 * and probe for devices at all of the addresses listed.
220 * Returns NULL if no devices found.
221 * See Documentation/i2c/instantiating-devices for more information.
222 */
223static struct i2c_client *add_probed_i2c_device(
224 const char *name,
225 enum i2c_adapter_type type,
226 struct i2c_board_info *info,
227 const unsigned short *addrs)
228{
229 return __add_probed_i2c_device(name,
230 find_i2c_adapter_num(type),
231 info,
232 addrs);
233}
234
235/*
236 * Probes for a device at a single address, the one provided by
237 * info->addr.
238 * Returns NULL if no device found.
239 */
240static struct i2c_client *add_i2c_device(const char *name,
241 enum i2c_adapter_type type,
242 struct i2c_board_info *info)
243{
244 const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
245 return __add_probed_i2c_device(name,
246 find_i2c_adapter_num(type),
247 info,
248 addr_list);
249}
250
251static int setup_cyapa_tp(enum i2c_adapter_type type)
252{
253 if (tp)
254 return 0;
255
256 /* add cyapa touchpad */
257 tp = add_i2c_device("trackpad", type, &cyapa_device);
258 return (!tp) ? -EAGAIN : 0;
259}
260
261static int setup_atmel_224s_tp(enum i2c_adapter_type type)
262{
263 const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
264 ATMEL_TP_I2C_ADDR,
265 I2C_CLIENT_END };
266 if (tp)
267 return 0;
268
269 /* add atmel mxt touchpad */
270 tp = add_probed_i2c_device("trackpad", type,
271 &atmel_224s_tp_device, addr_list);
272 return (!tp) ? -EAGAIN : 0;
273}
274
275static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
276{
277 const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
278 ATMEL_TS_I2C_ADDR,
279 I2C_CLIENT_END };
280 if (ts)
281 return 0;
282
283 /* add atmel mxt touch device */
284 ts = add_probed_i2c_device("touchscreen", type,
285 &atmel_1664s_device, addr_list);
286 return (!ts) ? -EAGAIN : 0;
287}
288
289static int setup_isl29018_als(enum i2c_adapter_type type)
290{
291 if (als)
292 return 0;
293
294 /* add isl29018 light sensor */
295 als = add_i2c_device("lightsensor", type, &isl_als_device);
296 return (!als) ? -EAGAIN : 0;
297}
298
299static int setup_tsl2583_als(enum i2c_adapter_type type)
300{
301 if (als)
302 return 0;
303
304 /* add tsl2583 light sensor */
305 als = add_i2c_device(NULL, type, &tsl2583_als_device);
306 return (!als) ? -EAGAIN : 0;
307}
308
309static int setup_tsl2563_als(enum i2c_adapter_type type)
310{
311 if (als)
312 return 0;
313
314 /* add tsl2563 light sensor */
315 als = add_i2c_device(NULL, type, &tsl2563_als_device);
316 return (!als) ? -EAGAIN : 0;
317}
318
319static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
320{
321 cros_laptop = (void *)id->driver_data;
322 pr_debug("DMI Matched %s.\n", id->ident);
323
324 /* Indicate to dmi_scan that processing is done. */
325 return 1;
326}
327
328static int chromeos_laptop_probe(struct platform_device *pdev)
329{
330 int i;
331 int ret = 0;
332
333 for (i = 0; i < MAX_I2C_PERIPHERALS; i++) {
334 struct i2c_peripheral *i2c_dev;
335
336 i2c_dev = &cros_laptop->i2c_peripherals[i];
337
338 /* No more peripherals. */
339 if (i2c_dev->add == NULL)
340 break;
341
342 /* Add the device. Set -EPROBE_DEFER on any failure */
343 if (i2c_dev->add(i2c_dev->type))
344 ret = -EPROBE_DEFER;
345 }
346
347 return ret;
348}
349
350static struct chromeos_laptop samsung_series_5_550 = {
351 .i2c_peripherals = {
352 /* Touchpad. */
353 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
354 /* Light Sensor. */
355 { .add = setup_isl29018_als, I2C_ADAPTER_SMBUS },
356 },
357};
358
359static struct chromeos_laptop samsung_series_5 = {
360 .i2c_peripherals = {
361 /* Light Sensor. */
362 { .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
363 },
364};
365
366static struct chromeos_laptop chromebook_pixel = {
367 .i2c_peripherals = {
368 /* Touch Screen. */
369 { .add = setup_atmel_1664s_ts, I2C_ADAPTER_PANEL },
370 /* Touchpad. */
371 { .add = setup_atmel_224s_tp, I2C_ADAPTER_VGADDC },
372 /* Light Sensor. */
373 { .add = setup_isl29018_als, I2C_ADAPTER_PANEL },
374 },
375};
376
377static struct chromeos_laptop acer_c7_chromebook = {
378 .i2c_peripherals = {
379 /* Touchpad. */
380 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
381 },
382};
383
384static struct chromeos_laptop acer_ac700 = {
385 .i2c_peripherals = {
386 /* Light Sensor. */
387 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
388 },
389};
390
391static struct chromeos_laptop hp_pavilion_14_chromebook = {
392 .i2c_peripherals = {
393 /* Touchpad. */
394 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
395 },
396};
397
398static struct chromeos_laptop cr48 = {
399 .i2c_peripherals = {
400 /* Light Sensor. */
401 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
402 },
403};
404
405#define _CBDD(board_) \
406 .callback = chromeos_laptop_dmi_matched, \
407 .driver_data = (void *)&board_
408
409static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
410 {
411 .ident = "Samsung Series 5 550",
412 .matches = {
413 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
414 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
415 },
416 _CBDD(samsung_series_5_550),
417 },
418 {
419 .ident = "Samsung Series 5",
420 .matches = {
421 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
422 },
423 _CBDD(samsung_series_5),
424 },
425 {
426 .ident = "Chromebook Pixel",
427 .matches = {
428 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
429 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
430 },
431 _CBDD(chromebook_pixel),
432 },
433 {
434 .ident = "Acer C7 Chromebook",
435 .matches = {
436 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
437 },
438 _CBDD(acer_c7_chromebook),
439 },
440 {
441 .ident = "Acer AC700",
442 .matches = {
443 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
444 },
445 _CBDD(acer_ac700),
446 },
447 {
448 .ident = "HP Pavilion 14 Chromebook",
449 .matches = {
450 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
451 },
452 _CBDD(hp_pavilion_14_chromebook),
453 },
454 {
455 .ident = "Cr-48",
456 .matches = {
457 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
458 },
459 _CBDD(cr48),
460 },
461 { }
462};
463MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
464
465static struct platform_device *cros_platform_device;
466
467static struct platform_driver cros_platform_driver = {
468 .driver = {
469 .name = "chromeos_laptop",
470 .owner = THIS_MODULE,
471 },
472 .probe = chromeos_laptop_probe,
473};
474
475static int __init chromeos_laptop_init(void)
476{
477 int ret;
478 if (!dmi_check_system(chromeos_laptop_dmi_table)) {
479 pr_debug("%s unsupported system.\n", __func__);
480 return -ENODEV;
481 }
482
483 ret = platform_driver_register(&cros_platform_driver);
484 if (ret)
485 return ret;
486
487 cros_platform_device = platform_device_alloc("chromeos_laptop", -1);
488 if (!cros_platform_device) {
489 ret = -ENOMEM;
490 goto fail_platform_device1;
491 }
492
493 ret = platform_device_add(cros_platform_device);
494 if (ret)
495 goto fail_platform_device2;
496
497 return 0;
498
499fail_platform_device2:
500 platform_device_put(cros_platform_device);
501fail_platform_device1:
502 platform_driver_unregister(&cros_platform_driver);
503 return ret;
504}
505
506static void __exit chromeos_laptop_exit(void)
507{
508 if (als)
509 i2c_unregister_device(als);
510 if (tp)
511 i2c_unregister_device(tp);
512 if (ts)
513 i2c_unregister_device(ts);
514
515 platform_device_unregister(cros_platform_device);
516 platform_driver_unregister(&cros_platform_driver);
517}
518
519module_init(chromeos_laptop_init);
520module_exit(chromeos_laptop_exit);
521
522MODULE_DESCRIPTION("Chrome OS Laptop driver");
523MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
524MODULE_LICENSE("GPL");