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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// SPDX-License-Identifier: GPL-2.0+
2// Driver to instantiate Chromebook i2c/smbus devices.
3//
4// Copyright (C) 2012 Google, Inc.
5// Author: Benson Leung <bleung@chromium.org>
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/dmi.h>
10#include <linux/i2c.h>
11#include <linux/input.h>
12#include <linux/interrupt.h>
13#include <linux/ioport.h>
14#include <linux/module.h>
15#include <linux/pci.h>
16#include <linux/platform_device.h>
17#include <linux/property.h>
18
19#define ATMEL_TP_I2C_ADDR 0x4b
20#define ATMEL_TP_I2C_BL_ADDR 0x25
21#define ATMEL_TS_I2C_ADDR 0x4a
22#define ATMEL_TS_I2C_BL_ADDR 0x26
23#define CYAPA_TP_I2C_ADDR 0x67
24#define ELAN_TP_I2C_ADDR 0x15
25#define ISL_ALS_I2C_ADDR 0x44
26#define TAOS_ALS_I2C_ADDR 0x29
27
28static const char *i2c_adapter_names[] = {
29 "SMBus I801 adapter",
30 "i915 gmbus vga",
31 "i915 gmbus panel",
32 "Synopsys DesignWare I2C adapter",
33};
34
35/* Keep this enum consistent with i2c_adapter_names */
36enum i2c_adapter_type {
37 I2C_ADAPTER_SMBUS = 0,
38 I2C_ADAPTER_VGADDC,
39 I2C_ADAPTER_PANEL,
40 I2C_ADAPTER_DESIGNWARE,
41};
42
43struct i2c_peripheral {
44 struct i2c_board_info board_info;
45 unsigned short alt_addr;
46
47 const char *dmi_name;
48 unsigned long irqflags;
49 struct resource irq_resource;
50
51 enum i2c_adapter_type type;
52 u32 pci_devid;
53
54 struct i2c_client *client;
55};
56
57struct chromeos_laptop {
58 /*
59 * Note that we can't mark this pointer as const because
60 * i2c_new_probed_device() changes passed in I2C board info, so.
61 */
62 struct i2c_peripheral *i2c_peripherals;
63 unsigned int num_i2c_peripherals;
64};
65
66static const struct chromeos_laptop *cros_laptop;
67
68static struct i2c_client *
69chromes_laptop_instantiate_i2c_device(struct i2c_adapter *adapter,
70 struct i2c_board_info *info,
71 unsigned short alt_addr)
72{
73 const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
74 struct i2c_client *client;
75
76 /*
77 * Add the i2c device. If we can't detect it at the primary
78 * address we scan secondary addresses. In any case the client
79 * structure gets assigned primary address.
80 */
81 client = i2c_new_probed_device(adapter, info, addr_list, NULL);
82 if (!client && alt_addr) {
83 struct i2c_board_info dummy_info = {
84 I2C_BOARD_INFO("dummy", info->addr),
85 };
86 const unsigned short alt_addr_list[] = {
87 alt_addr, I2C_CLIENT_END
88 };
89 struct i2c_client *dummy;
90
91 dummy = i2c_new_probed_device(adapter, &dummy_info,
92 alt_addr_list, NULL);
93 if (dummy) {
94 pr_debug("%d-%02x is probed at %02x\n",
95 adapter->nr, info->addr, dummy->addr);
96 i2c_unregister_device(dummy);
97 client = i2c_new_device(adapter, info);
98 }
99 }
100
101 if (!client)
102 pr_debug("failed to register device %d-%02x\n",
103 adapter->nr, info->addr);
104 else
105 pr_debug("added i2c device %d-%02x\n",
106 adapter->nr, info->addr);
107
108 return client;
109}
110
111static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid)
112{
113 struct pci_dev *pdev;
114
115 if (!dev_is_pci(dev))
116 return false;
117
118 pdev = to_pci_dev(dev);
119 return devid == PCI_DEVID(pdev->bus->number, pdev->devfn);
120}
121
122static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)
123{
124 struct i2c_peripheral *i2c_dev;
125 int i;
126
127 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
128 i2c_dev = &cros_laptop->i2c_peripherals[i];
129
130 /* Skip devices already created */
131 if (i2c_dev->client)
132 continue;
133
134 if (strncmp(adapter->name, i2c_adapter_names[i2c_dev->type],
135 strlen(i2c_adapter_names[i2c_dev->type])))
136 continue;
137
138 if (i2c_dev->pci_devid &&
139 !chromeos_laptop_match_adapter_devid(adapter->dev.parent,
140 i2c_dev->pci_devid)) {
141 continue;
142 }
143
144 i2c_dev->client =
145 chromes_laptop_instantiate_i2c_device(adapter,
146 &i2c_dev->board_info,
147 i2c_dev->alt_addr);
148 }
149}
150
151static void chromeos_laptop_detach_i2c_client(struct i2c_client *client)
152{
153 struct i2c_peripheral *i2c_dev;
154 int i;
155
156 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
157 i2c_dev = &cros_laptop->i2c_peripherals[i];
158
159 if (i2c_dev->client == client)
160 i2c_dev->client = NULL;
161 }
162}
163
164static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb,
165 unsigned long action, void *data)
166{
167 struct device *dev = data;
168
169 switch (action) {
170 case BUS_NOTIFY_ADD_DEVICE:
171 if (dev->type == &i2c_adapter_type)
172 chromeos_laptop_check_adapter(to_i2c_adapter(dev));
173 break;
174
175 case BUS_NOTIFY_REMOVED_DEVICE:
176 if (dev->type == &i2c_client_type)
177 chromeos_laptop_detach_i2c_client(to_i2c_client(dev));
178 break;
179 }
180
181 return 0;
182}
183
184static struct notifier_block chromeos_laptop_i2c_notifier = {
185 .notifier_call = chromeos_laptop_i2c_notifier_call,
186};
187
188#define DECLARE_CROS_LAPTOP(_name) \
189static const struct chromeos_laptop _name __initconst = { \
190 .i2c_peripherals = _name##_peripherals, \
191 .num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \
192}
193
194static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = {
195 /* Touchpad. */
196 {
197 .board_info = {
198 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
199 .flags = I2C_CLIENT_WAKE,
200 },
201 .dmi_name = "trackpad",
202 .type = I2C_ADAPTER_SMBUS,
203 },
204 /* Light Sensor. */
205 {
206 .board_info = {
207 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
208 },
209 .dmi_name = "lightsensor",
210 .type = I2C_ADAPTER_SMBUS,
211 },
212};
213DECLARE_CROS_LAPTOP(samsung_series_5_550);
214
215static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = {
216 /* Light Sensor. */
217 {
218 .board_info = {
219 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
220 },
221 .type = I2C_ADAPTER_SMBUS,
222 },
223};
224DECLARE_CROS_LAPTOP(samsung_series_5);
225
226static const int chromebook_pixel_tp_keys[] __initconst = {
227 KEY_RESERVED,
228 KEY_RESERVED,
229 KEY_RESERVED,
230 KEY_RESERVED,
231 KEY_RESERVED,
232 BTN_LEFT
233};
234
235static const struct property_entry
236chromebook_pixel_trackpad_props[] __initconst = {
237 PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys),
238 { }
239};
240
241static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
242 /* Touch Screen. */
243 {
244 .board_info = {
245 I2C_BOARD_INFO("atmel_mxt_ts",
246 ATMEL_TS_I2C_ADDR),
247 .flags = I2C_CLIENT_WAKE,
248 },
249 .dmi_name = "touchscreen",
250 .irqflags = IRQF_TRIGGER_FALLING,
251 .type = I2C_ADAPTER_PANEL,
252 .alt_addr = ATMEL_TS_I2C_BL_ADDR,
253 },
254 /* Touchpad. */
255 {
256 .board_info = {
257 I2C_BOARD_INFO("atmel_mxt_tp",
258 ATMEL_TP_I2C_ADDR),
259 .properties =
260 chromebook_pixel_trackpad_props,
261 .flags = I2C_CLIENT_WAKE,
262 },
263 .dmi_name = "trackpad",
264 .irqflags = IRQF_TRIGGER_FALLING,
265 .type = I2C_ADAPTER_VGADDC,
266 .alt_addr = ATMEL_TP_I2C_BL_ADDR,
267 },
268 /* Light Sensor. */
269 {
270 .board_info = {
271 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
272 },
273 .dmi_name = "lightsensor",
274 .type = I2C_ADAPTER_PANEL,
275 },
276};
277DECLARE_CROS_LAPTOP(chromebook_pixel);
278
279static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = {
280 /* Touchpad. */
281 {
282 .board_info = {
283 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
284 .flags = I2C_CLIENT_WAKE,
285 },
286 .dmi_name = "trackpad",
287 .type = I2C_ADAPTER_DESIGNWARE,
288 },
289};
290DECLARE_CROS_LAPTOP(hp_chromebook_14);
291
292static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = {
293 /* Touchpad. */
294 {
295 .board_info = {
296 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
297 .flags = I2C_CLIENT_WAKE,
298 },
299 .dmi_name = "trackpad",
300 .type = I2C_ADAPTER_DESIGNWARE,
301 },
302 /* Elan Touchpad option. */
303 {
304 .board_info = {
305 I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
306 .flags = I2C_CLIENT_WAKE,
307 },
308 .dmi_name = "trackpad",
309 .type = I2C_ADAPTER_DESIGNWARE,
310 },
311};
312DECLARE_CROS_LAPTOP(dell_chromebook_11);
313
314static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = {
315 /* Touchpad. */
316 {
317 .board_info = {
318 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
319 .flags = I2C_CLIENT_WAKE,
320 },
321 .dmi_name = "trackpad",
322 .type = I2C_ADAPTER_DESIGNWARE,
323 },
324};
325DECLARE_CROS_LAPTOP(toshiba_cb35);
326
327static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = {
328 /* Touchpad. */
329 {
330 .board_info = {
331 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
332 .flags = I2C_CLIENT_WAKE,
333 },
334 .dmi_name = "trackpad",
335 .type = I2C_ADAPTER_SMBUS,
336 },
337};
338DECLARE_CROS_LAPTOP(acer_c7_chromebook);
339
340static struct i2c_peripheral acer_ac700_peripherals[] __initdata = {
341 /* Light Sensor. */
342 {
343 .board_info = {
344 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
345 },
346 .type = I2C_ADAPTER_SMBUS,
347 },
348};
349DECLARE_CROS_LAPTOP(acer_ac700);
350
351static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
352 /* Touchscreen. */
353 {
354 .board_info = {
355 I2C_BOARD_INFO("atmel_mxt_ts",
356 ATMEL_TS_I2C_ADDR),
357 .flags = I2C_CLIENT_WAKE,
358 },
359 .dmi_name = "touchscreen",
360 .irqflags = IRQF_TRIGGER_FALLING,
361 .type = I2C_ADAPTER_DESIGNWARE,
362 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
363 .alt_addr = ATMEL_TS_I2C_BL_ADDR,
364 },
365 /* Touchpad. */
366 {
367 .board_info = {
368 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
369 .flags = I2C_CLIENT_WAKE,
370 },
371 .dmi_name = "trackpad",
372 .type = I2C_ADAPTER_DESIGNWARE,
373 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
374 },
375 /* Elan Touchpad option. */
376 {
377 .board_info = {
378 I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
379 .flags = I2C_CLIENT_WAKE,
380 },
381 .dmi_name = "trackpad",
382 .type = I2C_ADAPTER_DESIGNWARE,
383 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
384 },
385 /* Light Sensor. */
386 {
387 .board_info = {
388 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
389 },
390 .dmi_name = "lightsensor",
391 .type = I2C_ADAPTER_DESIGNWARE,
392 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
393 },
394};
395DECLARE_CROS_LAPTOP(acer_c720);
396
397static struct i2c_peripheral
398hp_pavilion_14_chromebook_peripherals[] __initdata = {
399 /* Touchpad. */
400 {
401 .board_info = {
402 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
403 .flags = I2C_CLIENT_WAKE,
404 },
405 .dmi_name = "trackpad",
406 .type = I2C_ADAPTER_SMBUS,
407 },
408};
409DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook);
410
411static struct i2c_peripheral cr48_peripherals[] __initdata = {
412 /* Light Sensor. */
413 {
414 .board_info = {
415 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
416 },
417 .type = I2C_ADAPTER_SMBUS,
418 },
419};
420DECLARE_CROS_LAPTOP(cr48);
421
422static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = {
423 {
424 .ident = "Samsung Series 5 550",
425 .matches = {
426 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
427 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
428 },
429 .driver_data = (void *)&samsung_series_5_550,
430 },
431 {
432 .ident = "Samsung Series 5",
433 .matches = {
434 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
435 },
436 .driver_data = (void *)&samsung_series_5,
437 },
438 {
439 .ident = "Chromebook Pixel",
440 .matches = {
441 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
442 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
443 },
444 .driver_data = (void *)&chromebook_pixel,
445 },
446 {
447 .ident = "Wolf",
448 .matches = {
449 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
450 DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
451 },
452 .driver_data = (void *)&dell_chromebook_11,
453 },
454 {
455 .ident = "HP Chromebook 14",
456 .matches = {
457 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
458 DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
459 },
460 .driver_data = (void *)&hp_chromebook_14,
461 },
462 {
463 .ident = "Toshiba CB35",
464 .matches = {
465 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
466 DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
467 },
468 .driver_data = (void *)&toshiba_cb35,
469 },
470 {
471 .ident = "Acer C7 Chromebook",
472 .matches = {
473 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
474 },
475 .driver_data = (void *)&acer_c7_chromebook,
476 },
477 {
478 .ident = "Acer AC700",
479 .matches = {
480 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
481 },
482 .driver_data = (void *)&acer_ac700,
483 },
484 {
485 .ident = "Acer C720",
486 .matches = {
487 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
488 },
489 .driver_data = (void *)&acer_c720,
490 },
491 {
492 .ident = "HP Pavilion 14 Chromebook",
493 .matches = {
494 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
495 },
496 .driver_data = (void *)&hp_pavilion_14_chromebook,
497 },
498 {
499 .ident = "Cr-48",
500 .matches = {
501 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
502 },
503 .driver_data = (void *)&cr48,
504 },
505 { }
506};
507MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
508
509static int __init chromeos_laptop_scan_adapter(struct device *dev, void *data)
510{
511 struct i2c_adapter *adapter;
512
513 adapter = i2c_verify_adapter(dev);
514 if (adapter)
515 chromeos_laptop_check_adapter(adapter);
516
517 return 0;
518}
519
520static int __init chromeos_laptop_get_irq_from_dmi(const char *dmi_name)
521{
522 const struct dmi_device *dmi_dev;
523 const struct dmi_dev_onboard *dev_data;
524
525 dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, dmi_name, NULL);
526 if (!dmi_dev) {
527 pr_err("failed to find DMI device '%s'\n", dmi_name);
528 return -ENOENT;
529 }
530
531 dev_data = dmi_dev->device_data;
532 if (!dev_data) {
533 pr_err("failed to get data from DMI for '%s'\n", dmi_name);
534 return -EINVAL;
535 }
536
537 return dev_data->instance;
538}
539
540static int __init chromeos_laptop_setup_irq(struct i2c_peripheral *i2c_dev)
541{
542 int irq;
543
544 if (i2c_dev->dmi_name) {
545 irq = chromeos_laptop_get_irq_from_dmi(i2c_dev->dmi_name);
546 if (irq < 0)
547 return irq;
548
549 i2c_dev->irq_resource = (struct resource)
550 DEFINE_RES_NAMED(irq, 1, NULL,
551 IORESOURCE_IRQ | i2c_dev->irqflags);
552 i2c_dev->board_info.resources = &i2c_dev->irq_resource;
553 i2c_dev->board_info.num_resources = 1;
554 }
555
556 return 0;
557}
558
559static struct chromeos_laptop * __init
560chromeos_laptop_prepare(const struct chromeos_laptop *src)
561{
562 struct chromeos_laptop *cros_laptop;
563 struct i2c_peripheral *i2c_dev;
564 struct i2c_board_info *info;
565 int error;
566 int i;
567
568 cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL);
569 if (!cros_laptop)
570 return ERR_PTR(-ENOMEM);
571
572 cros_laptop->i2c_peripherals = kmemdup(src->i2c_peripherals,
573 src->num_i2c_peripherals *
574 sizeof(*src->i2c_peripherals),
575 GFP_KERNEL);
576 if (!cros_laptop->i2c_peripherals) {
577 error = -ENOMEM;
578 goto err_free_cros_laptop;
579 }
580
581 cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals;
582
583 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
584 i2c_dev = &cros_laptop->i2c_peripherals[i];
585 info = &i2c_dev->board_info;
586
587 error = chromeos_laptop_setup_irq(i2c_dev);
588 if (error)
589 goto err_destroy_cros_peripherals;
590
591 /* We need to deep-copy properties */
592 if (info->properties) {
593 info->properties =
594 property_entries_dup(info->properties);
595 if (IS_ERR(info->properties)) {
596 error = PTR_ERR(info->properties);
597 goto err_destroy_cros_peripherals;
598 }
599 }
600 }
601
602 return cros_laptop;
603
604err_destroy_cros_peripherals:
605 while (--i >= 0) {
606 i2c_dev = &cros_laptop->i2c_peripherals[i];
607 info = &i2c_dev->board_info;
608 if (info->properties)
609 property_entries_free(info->properties);
610 }
611 kfree(cros_laptop->i2c_peripherals);
612err_free_cros_laptop:
613 kfree(cros_laptop);
614 return ERR_PTR(error);
615}
616
617static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
618{
619 struct i2c_peripheral *i2c_dev;
620 struct i2c_board_info *info;
621 int i;
622
623 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
624 i2c_dev = &cros_laptop->i2c_peripherals[i];
625 info = &i2c_dev->board_info;
626
627 if (i2c_dev->client)
628 i2c_unregister_device(i2c_dev->client);
629
630 if (info->properties)
631 property_entries_free(info->properties);
632 }
633
634 kfree(cros_laptop->i2c_peripherals);
635 kfree(cros_laptop);
636}
637
638static int __init chromeos_laptop_init(void)
639{
640 const struct dmi_system_id *dmi_id;
641 int error;
642
643 dmi_id = dmi_first_match(chromeos_laptop_dmi_table);
644 if (!dmi_id) {
645 pr_debug("unsupported system\n");
646 return -ENODEV;
647 }
648
649 pr_debug("DMI Matched %s\n", dmi_id->ident);
650
651 cros_laptop = chromeos_laptop_prepare((void *)dmi_id->driver_data);
652 if (IS_ERR(cros_laptop))
653 return PTR_ERR(cros_laptop);
654
655 error = bus_register_notifier(&i2c_bus_type,
656 &chromeos_laptop_i2c_notifier);
657 if (error) {
658 pr_err("failed to register i2c bus notifier: %d\n", error);
659 chromeos_laptop_destroy(cros_laptop);
660 return error;
661 }
662
663 /*
664 * Scan adapters that have been registered before we installed
665 * the notifier to make sure we do not miss any devices.
666 */
667 i2c_for_each_dev(NULL, chromeos_laptop_scan_adapter);
668
669 return 0;
670}
671
672static void __exit chromeos_laptop_exit(void)
673{
674 bus_unregister_notifier(&i2c_bus_type, &chromeos_laptop_i2c_notifier);
675 chromeos_laptop_destroy(cros_laptop);
676}
677
678module_init(chromeos_laptop_init);
679module_exit(chromeos_laptop_exit);
680
681MODULE_DESCRIPTION("Chrome OS Laptop driver");
682MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
683MODULE_LICENSE("GPL");