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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
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 "i2c-designware-pci",
51 "i2c-designware-pci",
52};
53
54
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};
115
116static struct i2c_board_info atmel_224s_tp_device = {
117 I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
118 .platform_data = &atmel_224s_tp_platform_data,
119 .flags = I2C_CLIENT_WAKE,
120};
121
122static struct mxt_platform_data atmel_1664s_platform_data = {
123 .irqflags = IRQF_TRIGGER_FALLING,
124};
125
126static struct i2c_board_info atmel_1664s_device = {
127 I2C_BOARD_INFO("atmel_mxt_ts", ATMEL_TS_I2C_ADDR),
128 .platform_data = &atmel_1664s_platform_data,
129 .flags = I2C_CLIENT_WAKE,
130};
131
132static struct i2c_client *__add_probed_i2c_device(
133 const char *name,
134 int bus,
135 struct i2c_board_info *info,
136 const unsigned short *addrs)
137{
138 const struct dmi_device *dmi_dev;
139 const struct dmi_dev_onboard *dev_data;
140 struct i2c_adapter *adapter;
141 struct i2c_client *client;
142
143 if (bus < 0)
144 return NULL;
145
146
147
148
149 if (name) {
150 dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
151 if (!dmi_dev) {
152 pr_err("%s failed to dmi find device %s.\n",
153 __func__,
154 name);
155 return NULL;
156 }
157 dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
158 if (!dev_data) {
159 pr_err("%s failed to get data from dmi for %s.\n",
160 __func__, name);
161 return NULL;
162 }
163 info->irq = dev_data->instance;
164 }
165
166 adapter = i2c_get_adapter(bus);
167 if (!adapter) {
168 pr_err("%s failed to get i2c adapter %d.\n", __func__, bus);
169 return NULL;
170 }
171
172
173 client = i2c_new_probed_device(adapter, info, addrs, NULL);
174 if (!client)
175 pr_notice("%s failed to register device %d-%02x\n",
176 __func__, bus, info->addr);
177 else
178 pr_debug("%s added i2c device %d-%02x\n",
179 __func__, bus, info->addr);
180
181 i2c_put_adapter(adapter);
182 return client;
183}
184
185struct i2c_lookup {
186 const char *name;
187 int instance;
188 int n;
189};
190
191static int __find_i2c_adap(struct device *dev, void *data)
192{
193 struct i2c_lookup *lookup = data;
194 static const char *prefix = "i2c-";
195 struct i2c_adapter *adapter;
196
197 if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
198 return 0;
199 adapter = to_i2c_adapter(dev);
200 if (strncmp(adapter->name, lookup->name, strlen(lookup->name)) == 0 &&
201 lookup->n++ == lookup->instance)
202 return 1;
203 return 0;
204}
205
206static int find_i2c_adapter_num(enum i2c_adapter_type type)
207{
208 struct device *dev = NULL;
209 struct i2c_adapter *adapter;
210 struct i2c_lookup lookup;
211
212 memset(&lookup, 0, sizeof(lookup));
213 lookup.name = i2c_adapter_names[type];
214 lookup.instance = (type == I2C_ADAPTER_DESIGNWARE_1) ? 1 : 0;
215
216
217 dev = bus_find_device(&i2c_bus_type, NULL, &lookup, __find_i2c_adap);
218 if (!dev) {
219
220 pr_notice("%s: i2c adapter %s not found on system.\n", __func__,
221 lookup.name);
222 return -ENODEV;
223 }
224 adapter = to_i2c_adapter(dev);
225 return adapter->nr;
226}
227
228
229
230
231
232
233
234
235
236static struct i2c_client *add_probed_i2c_device(
237 const char *name,
238 enum i2c_adapter_type type,
239 struct i2c_board_info *info,
240 const unsigned short *addrs)
241{
242 return __add_probed_i2c_device(name,
243 find_i2c_adapter_num(type),
244 info,
245 addrs);
246}
247
248
249
250
251
252
253static struct i2c_client *add_i2c_device(const char *name,
254 enum i2c_adapter_type type,
255 struct i2c_board_info *info)
256{
257 const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
258
259 return __add_probed_i2c_device(name,
260 find_i2c_adapter_num(type),
261 info,
262 addr_list);
263}
264
265static int setup_cyapa_tp(enum i2c_adapter_type type)
266{
267 if (tp)
268 return 0;
269
270
271 tp = add_i2c_device("trackpad", type, &cyapa_device);
272 return (!tp) ? -EAGAIN : 0;
273}
274
275static int setup_atmel_224s_tp(enum i2c_adapter_type type)
276{
277 const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
278 ATMEL_TP_I2C_ADDR,
279 I2C_CLIENT_END };
280 if (tp)
281 return 0;
282
283
284 tp = add_probed_i2c_device("trackpad", type,
285 &atmel_224s_tp_device, addr_list);
286 return (!tp) ? -EAGAIN : 0;
287}
288
289static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
290{
291 const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
292 ATMEL_TS_I2C_ADDR,
293 I2C_CLIENT_END };
294 if (ts)
295 return 0;
296
297
298 ts = add_probed_i2c_device("touchscreen", type,
299 &atmel_1664s_device, addr_list);
300 return (!ts) ? -EAGAIN : 0;
301}
302
303static int setup_isl29018_als(enum i2c_adapter_type type)
304{
305 if (als)
306 return 0;
307
308
309 als = add_i2c_device("lightsensor", type, &isl_als_device);
310 return (!als) ? -EAGAIN : 0;
311}
312
313static int setup_tsl2583_als(enum i2c_adapter_type type)
314{
315 if (als)
316 return 0;
317
318
319 als = add_i2c_device(NULL, type, &tsl2583_als_device);
320 return (!als) ? -EAGAIN : 0;
321}
322
323static int setup_tsl2563_als(enum i2c_adapter_type type)
324{
325 if (als)
326 return 0;
327
328
329 als = add_i2c_device(NULL, type, &tsl2563_als_device);
330 return (!als) ? -EAGAIN : 0;
331}
332
333static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
334{
335 cros_laptop = (void *)id->driver_data;
336 pr_debug("DMI Matched %s.\n", id->ident);
337
338
339 return 1;
340}
341
342static int chromeos_laptop_probe(struct platform_device *pdev)
343{
344 int i;
345 int ret = 0;
346
347 for (i = 0; i < MAX_I2C_PERIPHERALS; i++) {
348 struct i2c_peripheral *i2c_dev;
349
350 i2c_dev = &cros_laptop->i2c_peripherals[i];
351
352
353 if (i2c_dev->add == NULL)
354 break;
355
356 if (i2c_dev->state == TIMEDOUT || i2c_dev->state == PROBED)
357 continue;
358
359
360
361
362
363
364 if (find_i2c_adapter_num(i2c_dev->type) == -ENODEV) {
365 ret = -EPROBE_DEFER;
366 continue;
367 }
368
369
370 if (i2c_dev->add(i2c_dev->type) == -EAGAIN) {
371
372
373
374
375 if (++i2c_dev->tries < MAX_I2C_DEVICE_DEFERRALS) {
376 ret = -EPROBE_DEFER;
377 } else {
378
379 pr_notice("%s: Ran out of tries for device.\n",
380 __func__);
381 i2c_dev->state = TIMEDOUT;
382 }
383 } else {
384 i2c_dev->state = PROBED;
385 }
386 }
387
388 return ret;
389}
390
391static struct chromeos_laptop samsung_series_5_550 = {
392 .i2c_peripherals = {
393
394 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
395
396 { .add = setup_isl29018_als, I2C_ADAPTER_SMBUS },
397 },
398};
399
400static struct chromeos_laptop samsung_series_5 = {
401 .i2c_peripherals = {
402
403 { .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
404 },
405};
406
407static struct chromeos_laptop chromebook_pixel = {
408 .i2c_peripherals = {
409
410 { .add = setup_atmel_1664s_ts, I2C_ADAPTER_PANEL },
411
412 { .add = setup_atmel_224s_tp, I2C_ADAPTER_VGADDC },
413
414 { .add = setup_isl29018_als, I2C_ADAPTER_PANEL },
415 },
416};
417
418static struct chromeos_laptop hp_chromebook_14 = {
419 .i2c_peripherals = {
420
421 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
422 },
423};
424
425static struct chromeos_laptop dell_chromebook_11 = {
426 .i2c_peripherals = {
427
428 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
429 },
430};
431
432static struct chromeos_laptop toshiba_cb35 = {
433 .i2c_peripherals = {
434
435 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
436 },
437};
438
439static struct chromeos_laptop acer_c7_chromebook = {
440 .i2c_peripherals = {
441
442 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
443 },
444};
445
446static struct chromeos_laptop acer_ac700 = {
447 .i2c_peripherals = {
448
449 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
450 },
451};
452
453static struct chromeos_laptop acer_c720 = {
454 .i2c_peripherals = {
455
456 { .add = setup_atmel_1664s_ts, I2C_ADAPTER_DESIGNWARE_1 },
457
458 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
459
460 { .add = setup_isl29018_als, I2C_ADAPTER_DESIGNWARE_1 },
461 },
462};
463
464static struct chromeos_laptop hp_pavilion_14_chromebook = {
465 .i2c_peripherals = {
466
467 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
468 },
469};
470
471static struct chromeos_laptop cr48 = {
472 .i2c_peripherals = {
473
474 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
475 },
476};
477
478#define _CBDD(board_) \
479 .callback = chromeos_laptop_dmi_matched, \
480 .driver_data = (void *)&board_
481
482static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
483 {
484 .ident = "Samsung Series 5 550",
485 .matches = {
486 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
487 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
488 },
489 _CBDD(samsung_series_5_550),
490 },
491 {
492 .ident = "Samsung Series 5",
493 .matches = {
494 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
495 },
496 _CBDD(samsung_series_5),
497 },
498 {
499 .ident = "Chromebook Pixel",
500 .matches = {
501 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
502 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
503 },
504 _CBDD(chromebook_pixel),
505 },
506 {
507 .ident = "Wolf",
508 .matches = {
509 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
510 DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
511 },
512 _CBDD(dell_chromebook_11),
513 },
514 {
515 .ident = "HP Chromebook 14",
516 .matches = {
517 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
518 DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
519 },
520 _CBDD(hp_chromebook_14),
521 },
522 {
523 .ident = "Toshiba CB35",
524 .matches = {
525 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
526 DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
527 },
528 _CBDD(toshiba_cb35),
529 },
530 {
531 .ident = "Acer C7 Chromebook",
532 .matches = {
533 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
534 },
535 _CBDD(acer_c7_chromebook),
536 },
537 {
538 .ident = "Acer AC700",
539 .matches = {
540 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
541 },
542 _CBDD(acer_ac700),
543 },
544 {
545 .ident = "Acer C720",
546 .matches = {
547 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
548 },
549 _CBDD(acer_c720),
550 },
551 {
552 .ident = "HP Pavilion 14 Chromebook",
553 .matches = {
554 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
555 },
556 _CBDD(hp_pavilion_14_chromebook),
557 },
558 {
559 .ident = "Cr-48",
560 .matches = {
561 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
562 },
563 _CBDD(cr48),
564 },
565 { }
566};
567MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
568
569static struct platform_device *cros_platform_device;
570
571static struct platform_driver cros_platform_driver = {
572 .driver = {
573 .name = "chromeos_laptop",
574 },
575 .probe = chromeos_laptop_probe,
576};
577
578static int __init chromeos_laptop_init(void)
579{
580 int ret;
581
582 if (!dmi_check_system(chromeos_laptop_dmi_table)) {
583 pr_debug("%s unsupported system.\n", __func__);
584 return -ENODEV;
585 }
586
587 ret = platform_driver_register(&cros_platform_driver);
588 if (ret)
589 return ret;
590
591 cros_platform_device = platform_device_alloc("chromeos_laptop", -1);
592 if (!cros_platform_device) {
593 ret = -ENOMEM;
594 goto fail_platform_device1;
595 }
596
597 ret = platform_device_add(cros_platform_device);
598 if (ret)
599 goto fail_platform_device2;
600
601 return 0;
602
603fail_platform_device2:
604 platform_device_put(cros_platform_device);
605fail_platform_device1:
606 platform_driver_unregister(&cros_platform_driver);
607 return ret;
608}
609
610static void __exit chromeos_laptop_exit(void)
611{
612 if (als)
613 i2c_unregister_device(als);
614 if (tp)
615 i2c_unregister_device(tp);
616 if (ts)
617 i2c_unregister_device(ts);
618
619 platform_device_unregister(cros_platform_device);
620 platform_driver_unregister(&cros_platform_driver);
621}
622
623module_init(chromeos_laptop_init);
624module_exit(chromeos_laptop_exit);
625
626MODULE_DESCRIPTION("Chrome OS Laptop driver");
627MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
628MODULE_LICENSE("GPL");
629