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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/acpi.h>
10#include <linux/dmi.h>
11#include <linux/i2c.h>
12#include <linux/input.h>
13#include <linux/interrupt.h>
14#include <linux/ioport.h>
15#include <linux/module.h>
16#include <linux/pci.h>
17#include <linux/platform_device.h>
18#include <linux/property.h>
19
20#define ATMEL_TP_I2C_ADDR 0x4b
21#define ATMEL_TP_I2C_BL_ADDR 0x25
22#define ATMEL_TS_I2C_ADDR 0x4a
23#define ATMEL_TS_I2C_BL_ADDR 0x26
24#define CYAPA_TP_I2C_ADDR 0x67
25#define ELAN_TP_I2C_ADDR 0x15
26#define ISL_ALS_I2C_ADDR 0x44
27#define TAOS_ALS_I2C_ADDR 0x29
28
29static const char *i2c_adapter_names[] = {
30 "SMBus I801 adapter",
31 "i915 gmbus vga",
32 "i915 gmbus panel",
33 "Synopsys DesignWare I2C adapter",
34};
35
36/* Keep this enum consistent with i2c_adapter_names */
37enum i2c_adapter_type {
38 I2C_ADAPTER_SMBUS = 0,
39 I2C_ADAPTER_VGADDC,
40 I2C_ADAPTER_PANEL,
41 I2C_ADAPTER_DESIGNWARE,
42};
43
44struct i2c_peripheral {
45 struct i2c_board_info board_info;
46 unsigned short alt_addr;
47
48 const char *dmi_name;
49 unsigned long irqflags;
50 struct resource irq_resource;
51
52 enum i2c_adapter_type type;
53 u32 pci_devid;
54
55 struct i2c_client *client;
56};
57
58struct acpi_peripheral {
59 char hid[ACPI_ID_LEN];
60 const struct property_entry *properties;
61};
62
63struct chromeos_laptop {
64 /*
65 * Note that we can't mark this pointer as const because
66 * i2c_new_probed_device() changes passed in I2C board info, so.
67 */
68 struct i2c_peripheral *i2c_peripherals;
69 unsigned int num_i2c_peripherals;
70
71 const struct acpi_peripheral *acpi_peripherals;
72 unsigned int num_acpi_peripherals;
73};
74
75static const struct chromeos_laptop *cros_laptop;
76
77static struct i2c_client *
78chromes_laptop_instantiate_i2c_device(struct i2c_adapter *adapter,
79 struct i2c_board_info *info,
80 unsigned short alt_addr)
81{
82 const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
83 struct i2c_client *client;
84
85 /*
86 * Add the i2c device. If we can't detect it at the primary
87 * address we scan secondary addresses. In any case the client
88 * structure gets assigned primary address.
89 */
90 client = i2c_new_probed_device(adapter, info, addr_list, NULL);
91 if (!client && alt_addr) {
92 struct i2c_board_info dummy_info = {
93 I2C_BOARD_INFO("dummy", info->addr),
94 };
95 const unsigned short alt_addr_list[] = {
96 alt_addr, I2C_CLIENT_END
97 };
98 struct i2c_client *dummy;
99
100 dummy = i2c_new_probed_device(adapter, &dummy_info,
101 alt_addr_list, NULL);
102 if (dummy) {
103 pr_debug("%d-%02x is probed at %02x\n",
104 adapter->nr, info->addr, dummy->addr);
105 i2c_unregister_device(dummy);
106 client = i2c_new_device(adapter, info);
107 }
108 }
109
110 if (!client)
111 pr_debug("failed to register device %d-%02x\n",
112 adapter->nr, info->addr);
113 else
114 pr_debug("added i2c device %d-%02x\n",
115 adapter->nr, info->addr);
116
117 return client;
118}
119
120static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid)
121{
122 struct pci_dev *pdev;
123
124 if (!dev_is_pci(dev))
125 return false;
126
127 pdev = to_pci_dev(dev);
128 return devid == pci_dev_id(pdev);
129}
130
131static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)
132{
133 struct i2c_peripheral *i2c_dev;
134 int i;
135
136 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
137 i2c_dev = &cros_laptop->i2c_peripherals[i];
138
139 /* Skip devices already created */
140 if (i2c_dev->client)
141 continue;
142
143 if (strncmp(adapter->name, i2c_adapter_names[i2c_dev->type],
144 strlen(i2c_adapter_names[i2c_dev->type])))
145 continue;
146
147 if (i2c_dev->pci_devid &&
148 !chromeos_laptop_match_adapter_devid(adapter->dev.parent,
149 i2c_dev->pci_devid)) {
150 continue;
151 }
152
153 i2c_dev->client =
154 chromes_laptop_instantiate_i2c_device(adapter,
155 &i2c_dev->board_info,
156 i2c_dev->alt_addr);
157 }
158}
159
160static bool chromeos_laptop_adjust_client(struct i2c_client *client)
161{
162 const struct acpi_peripheral *acpi_dev;
163 struct acpi_device_id acpi_ids[2] = { };
164 int i;
165 int error;
166
167 if (!has_acpi_companion(&client->dev))
168 return false;
169
170 for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
171 acpi_dev = &cros_laptop->acpi_peripherals[i];
172
173 memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN);
174
175 if (acpi_match_device(acpi_ids, &client->dev)) {
176 error = device_add_properties(&client->dev,
177 acpi_dev->properties);
178 if (error) {
179 dev_err(&client->dev,
180 "failed to add properties: %d\n",
181 error);
182 break;
183 }
184
185 return true;
186 }
187 }
188
189 return false;
190}
191
192static void chromeos_laptop_detach_i2c_client(struct i2c_client *client)
193{
194 struct i2c_peripheral *i2c_dev;
195 int i;
196
197 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
198 i2c_dev = &cros_laptop->i2c_peripherals[i];
199
200 if (i2c_dev->client == client)
201 i2c_dev->client = NULL;
202 }
203}
204
205static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb,
206 unsigned long action, void *data)
207{
208 struct device *dev = data;
209
210 switch (action) {
211 case BUS_NOTIFY_ADD_DEVICE:
212 if (dev->type == &i2c_adapter_type)
213 chromeos_laptop_check_adapter(to_i2c_adapter(dev));
214 else if (dev->type == &i2c_client_type)
215 chromeos_laptop_adjust_client(to_i2c_client(dev));
216 break;
217
218 case BUS_NOTIFY_REMOVED_DEVICE:
219 if (dev->type == &i2c_client_type)
220 chromeos_laptop_detach_i2c_client(to_i2c_client(dev));
221 break;
222 }
223
224 return 0;
225}
226
227static struct notifier_block chromeos_laptop_i2c_notifier = {
228 .notifier_call = chromeos_laptop_i2c_notifier_call,
229};
230
231#define DECLARE_CROS_LAPTOP(_name) \
232static const struct chromeos_laptop _name __initconst = { \
233 .i2c_peripherals = _name##_peripherals, \
234 .num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \
235}
236
237#define DECLARE_ACPI_CROS_LAPTOP(_name) \
238static const struct chromeos_laptop _name __initconst = { \
239 .acpi_peripherals = _name##_peripherals, \
240 .num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \
241}
242
243static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = {
244 /* Touchpad. */
245 {
246 .board_info = {
247 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
248 .flags = I2C_CLIENT_WAKE,
249 },
250 .dmi_name = "trackpad",
251 .type = I2C_ADAPTER_SMBUS,
252 },
253 /* Light Sensor. */
254 {
255 .board_info = {
256 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
257 },
258 .dmi_name = "lightsensor",
259 .type = I2C_ADAPTER_SMBUS,
260 },
261};
262DECLARE_CROS_LAPTOP(samsung_series_5_550);
263
264static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = {
265 /* Light Sensor. */
266 {
267 .board_info = {
268 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
269 },
270 .type = I2C_ADAPTER_SMBUS,
271 },
272};
273DECLARE_CROS_LAPTOP(samsung_series_5);
274
275static const int chromebook_pixel_tp_keys[] __initconst = {
276 KEY_RESERVED,
277 KEY_RESERVED,
278 KEY_RESERVED,
279 KEY_RESERVED,
280 KEY_RESERVED,
281 BTN_LEFT
282};
283
284static const struct property_entry
285chromebook_pixel_trackpad_props[] __initconst = {
286 PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
287 PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys),
288 { }
289};
290
291static const struct property_entry
292chromebook_atmel_touchscreen_props[] __initconst = {
293 PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
294 { }
295};
296
297static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
298 /* Touch Screen. */
299 {
300 .board_info = {
301 I2C_BOARD_INFO("atmel_mxt_ts",
302 ATMEL_TS_I2C_ADDR),
303 .properties =
304 chromebook_atmel_touchscreen_props,
305 .flags = I2C_CLIENT_WAKE,
306 },
307 .dmi_name = "touchscreen",
308 .irqflags = IRQF_TRIGGER_FALLING,
309 .type = I2C_ADAPTER_PANEL,
310 .alt_addr = ATMEL_TS_I2C_BL_ADDR,
311 },
312 /* Touchpad. */
313 {
314 .board_info = {
315 I2C_BOARD_INFO("atmel_mxt_tp",
316 ATMEL_TP_I2C_ADDR),
317 .properties =
318 chromebook_pixel_trackpad_props,
319 .flags = I2C_CLIENT_WAKE,
320 },
321 .dmi_name = "trackpad",
322 .irqflags = IRQF_TRIGGER_FALLING,
323 .type = I2C_ADAPTER_VGADDC,
324 .alt_addr = ATMEL_TP_I2C_BL_ADDR,
325 },
326 /* Light Sensor. */
327 {
328 .board_info = {
329 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
330 },
331 .dmi_name = "lightsensor",
332 .type = I2C_ADAPTER_PANEL,
333 },
334};
335DECLARE_CROS_LAPTOP(chromebook_pixel);
336
337static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = {
338 /* Touchpad. */
339 {
340 .board_info = {
341 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
342 .flags = I2C_CLIENT_WAKE,
343 },
344 .dmi_name = "trackpad",
345 .type = I2C_ADAPTER_DESIGNWARE,
346 },
347};
348DECLARE_CROS_LAPTOP(hp_chromebook_14);
349
350static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = {
351 /* Touchpad. */
352 {
353 .board_info = {
354 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
355 .flags = I2C_CLIENT_WAKE,
356 },
357 .dmi_name = "trackpad",
358 .type = I2C_ADAPTER_DESIGNWARE,
359 },
360 /* Elan Touchpad option. */
361 {
362 .board_info = {
363 I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
364 .flags = I2C_CLIENT_WAKE,
365 },
366 .dmi_name = "trackpad",
367 .type = I2C_ADAPTER_DESIGNWARE,
368 },
369};
370DECLARE_CROS_LAPTOP(dell_chromebook_11);
371
372static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = {
373 /* Touchpad. */
374 {
375 .board_info = {
376 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
377 .flags = I2C_CLIENT_WAKE,
378 },
379 .dmi_name = "trackpad",
380 .type = I2C_ADAPTER_DESIGNWARE,
381 },
382};
383DECLARE_CROS_LAPTOP(toshiba_cb35);
384
385static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = {
386 /* Touchpad. */
387 {
388 .board_info = {
389 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
390 .flags = I2C_CLIENT_WAKE,
391 },
392 .dmi_name = "trackpad",
393 .type = I2C_ADAPTER_SMBUS,
394 },
395};
396DECLARE_CROS_LAPTOP(acer_c7_chromebook);
397
398static struct i2c_peripheral acer_ac700_peripherals[] __initdata = {
399 /* Light Sensor. */
400 {
401 .board_info = {
402 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
403 },
404 .type = I2C_ADAPTER_SMBUS,
405 },
406};
407DECLARE_CROS_LAPTOP(acer_ac700);
408
409static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
410 /* Touchscreen. */
411 {
412 .board_info = {
413 I2C_BOARD_INFO("atmel_mxt_ts",
414 ATMEL_TS_I2C_ADDR),
415 .properties =
416 chromebook_atmel_touchscreen_props,
417 .flags = I2C_CLIENT_WAKE,
418 },
419 .dmi_name = "touchscreen",
420 .irqflags = IRQF_TRIGGER_FALLING,
421 .type = I2C_ADAPTER_DESIGNWARE,
422 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
423 .alt_addr = ATMEL_TS_I2C_BL_ADDR,
424 },
425 /* Touchpad. */
426 {
427 .board_info = {
428 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
429 .flags = I2C_CLIENT_WAKE,
430 },
431 .dmi_name = "trackpad",
432 .type = I2C_ADAPTER_DESIGNWARE,
433 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
434 },
435 /* Elan Touchpad option. */
436 {
437 .board_info = {
438 I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
439 .flags = I2C_CLIENT_WAKE,
440 },
441 .dmi_name = "trackpad",
442 .type = I2C_ADAPTER_DESIGNWARE,
443 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)),
444 },
445 /* Light Sensor. */
446 {
447 .board_info = {
448 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
449 },
450 .dmi_name = "lightsensor",
451 .type = I2C_ADAPTER_DESIGNWARE,
452 .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
453 },
454};
455DECLARE_CROS_LAPTOP(acer_c720);
456
457static struct i2c_peripheral
458hp_pavilion_14_chromebook_peripherals[] __initdata = {
459 /* Touchpad. */
460 {
461 .board_info = {
462 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
463 .flags = I2C_CLIENT_WAKE,
464 },
465 .dmi_name = "trackpad",
466 .type = I2C_ADAPTER_SMBUS,
467 },
468};
469DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook);
470
471static struct i2c_peripheral cr48_peripherals[] __initdata = {
472 /* Light Sensor. */
473 {
474 .board_info = {
475 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
476 },
477 .type = I2C_ADAPTER_SMBUS,
478 },
479};
480DECLARE_CROS_LAPTOP(cr48);
481
482static const u32 samus_touchpad_buttons[] __initconst = {
483 KEY_RESERVED,
484 KEY_RESERVED,
485 KEY_RESERVED,
486 BTN_LEFT
487};
488
489static const struct property_entry samus_trackpad_props[] __initconst = {
490 PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
491 PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons),
492 { }
493};
494
495static struct acpi_peripheral samus_peripherals[] __initdata = {
496 /* Touchpad */
497 {
498 .hid = "ATML0000",
499 .properties = samus_trackpad_props,
500 },
501 /* Touchsceen */
502 {
503 .hid = "ATML0001",
504 .properties = chromebook_atmel_touchscreen_props,
505 },
506};
507DECLARE_ACPI_CROS_LAPTOP(samus);
508
509static struct acpi_peripheral generic_atmel_peripherals[] __initdata = {
510 /* Touchpad */
511 {
512 .hid = "ATML0000",
513 .properties = chromebook_pixel_trackpad_props,
514 },
515 /* Touchsceen */
516 {
517 .hid = "ATML0001",
518 .properties = chromebook_atmel_touchscreen_props,
519 },
520};
521DECLARE_ACPI_CROS_LAPTOP(generic_atmel);
522
523static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = {
524 {
525 .ident = "Samsung Series 5 550",
526 .matches = {
527 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
528 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
529 },
530 .driver_data = (void *)&samsung_series_5_550,
531 },
532 {
533 .ident = "Samsung Series 5",
534 .matches = {
535 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
536 },
537 .driver_data = (void *)&samsung_series_5,
538 },
539 {
540 .ident = "Chromebook Pixel",
541 .matches = {
542 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
543 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
544 },
545 .driver_data = (void *)&chromebook_pixel,
546 },
547 {
548 .ident = "Wolf",
549 .matches = {
550 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
551 DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
552 },
553 .driver_data = (void *)&dell_chromebook_11,
554 },
555 {
556 .ident = "HP Chromebook 14",
557 .matches = {
558 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
559 DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
560 },
561 .driver_data = (void *)&hp_chromebook_14,
562 },
563 {
564 .ident = "Toshiba CB35",
565 .matches = {
566 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
567 DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
568 },
569 .driver_data = (void *)&toshiba_cb35,
570 },
571 {
572 .ident = "Acer C7 Chromebook",
573 .matches = {
574 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
575 },
576 .driver_data = (void *)&acer_c7_chromebook,
577 },
578 {
579 .ident = "Acer AC700",
580 .matches = {
581 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
582 },
583 .driver_data = (void *)&acer_ac700,
584 },
585 {
586 .ident = "Acer C720",
587 .matches = {
588 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
589 },
590 .driver_data = (void *)&acer_c720,
591 },
592 {
593 .ident = "HP Pavilion 14 Chromebook",
594 .matches = {
595 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
596 },
597 .driver_data = (void *)&hp_pavilion_14_chromebook,
598 },
599 {
600 .ident = "Cr-48",
601 .matches = {
602 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
603 },
604 .driver_data = (void *)&cr48,
605 },
606 /* Devices with peripherals incompletely described in ACPI */
607 {
608 .ident = "Chromebook Pro",
609 .matches = {
610 DMI_MATCH(DMI_SYS_VENDOR, "Google"),
611 DMI_MATCH(DMI_PRODUCT_NAME, "Caroline"),
612 },
613 .driver_data = (void *)&samus,
614 },
615 {
616 .ident = "Google Pixel 2 (2015)",
617 .matches = {
618 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
619 DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
620 },
621 .driver_data = (void *)&samus,
622 },
623 {
624 .ident = "Samsung Chromebook 3",
625 .matches = {
626 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
627 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
628 },
629 .driver_data = (void *)&samus,
630 },
631 {
632 /*
633 * Other Chromebooks with Atmel touch controllers:
634 * - Winky (touchpad)
635 * - Clapper, Expresso, Rambi, Glimmer (touchscreen)
636 */
637 .ident = "Other Chromebook",
638 .matches = {
639 /*
640 * This will match all Google devices, not only devices
641 * with Atmel, but we will validate that the device
642 * actually has matching peripherals.
643 */
644 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
645 },
646 .driver_data = (void *)&generic_atmel,
647 },
648 { }
649};
650MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
651
652static int __init chromeos_laptop_scan_peripherals(struct device *dev, void *data)
653{
654 int error;
655
656 if (dev->type == &i2c_adapter_type) {
657 chromeos_laptop_check_adapter(to_i2c_adapter(dev));
658 } else if (dev->type == &i2c_client_type) {
659 if (chromeos_laptop_adjust_client(to_i2c_client(dev))) {
660 /*
661 * Now that we have needed properties re-trigger
662 * driver probe in case driver was initialized
663 * earlier and probe failed.
664 */
665 error = device_attach(dev);
666 if (error < 0)
667 dev_warn(dev,
668 "%s: device_attach() failed: %d\n",
669 __func__, error);
670 }
671 }
672
673 return 0;
674}
675
676static int __init chromeos_laptop_get_irq_from_dmi(const char *dmi_name)
677{
678 const struct dmi_device *dmi_dev;
679 const struct dmi_dev_onboard *dev_data;
680
681 dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, dmi_name, NULL);
682 if (!dmi_dev) {
683 pr_err("failed to find DMI device '%s'\n", dmi_name);
684 return -ENOENT;
685 }
686
687 dev_data = dmi_dev->device_data;
688 if (!dev_data) {
689 pr_err("failed to get data from DMI for '%s'\n", dmi_name);
690 return -EINVAL;
691 }
692
693 return dev_data->instance;
694}
695
696static int __init chromeos_laptop_setup_irq(struct i2c_peripheral *i2c_dev)
697{
698 int irq;
699
700 if (i2c_dev->dmi_name) {
701 irq = chromeos_laptop_get_irq_from_dmi(i2c_dev->dmi_name);
702 if (irq < 0)
703 return irq;
704
705 i2c_dev->irq_resource = (struct resource)
706 DEFINE_RES_NAMED(irq, 1, NULL,
707 IORESOURCE_IRQ | i2c_dev->irqflags);
708 i2c_dev->board_info.resources = &i2c_dev->irq_resource;
709 i2c_dev->board_info.num_resources = 1;
710 }
711
712 return 0;
713}
714
715static int __init
716chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop,
717 const struct chromeos_laptop *src)
718{
719 struct i2c_peripheral *i2c_dev;
720 struct i2c_board_info *info;
721 int i;
722 int error;
723
724 if (!src->num_i2c_peripherals)
725 return 0;
726
727 cros_laptop->i2c_peripherals = kmemdup(src->i2c_peripherals,
728 src->num_i2c_peripherals *
729 sizeof(*src->i2c_peripherals),
730 GFP_KERNEL);
731 if (!cros_laptop->i2c_peripherals)
732 return -ENOMEM;
733
734 cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals;
735
736 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
737 i2c_dev = &cros_laptop->i2c_peripherals[i];
738 info = &i2c_dev->board_info;
739
740 error = chromeos_laptop_setup_irq(i2c_dev);
741 if (error)
742 goto err_out;
743
744 /* We need to deep-copy properties */
745 if (info->properties) {
746 info->properties =
747 property_entries_dup(info->properties);
748 if (IS_ERR(info->properties)) {
749 error = PTR_ERR(info->properties);
750 goto err_out;
751 }
752 }
753 }
754
755 return 0;
756
757err_out:
758 while (--i >= 0) {
759 i2c_dev = &cros_laptop->i2c_peripherals[i];
760 info = &i2c_dev->board_info;
761 if (info->properties)
762 property_entries_free(info->properties);
763 }
764 kfree(cros_laptop->i2c_peripherals);
765 return error;
766}
767
768static int __init
769chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop,
770 const struct chromeos_laptop *src)
771{
772 struct acpi_peripheral *acpi_peripherals;
773 struct acpi_peripheral *acpi_dev;
774 const struct acpi_peripheral *src_dev;
775 int n_peripherals = 0;
776 int i;
777 int error;
778
779 for (i = 0; i < src->num_acpi_peripherals; i++) {
780 if (acpi_dev_present(src->acpi_peripherals[i].hid, NULL, -1))
781 n_peripherals++;
782 }
783
784 if (!n_peripherals)
785 return 0;
786
787 acpi_peripherals = kcalloc(n_peripherals,
788 sizeof(*src->acpi_peripherals),
789 GFP_KERNEL);
790 if (!acpi_peripherals)
791 return -ENOMEM;
792
793 acpi_dev = acpi_peripherals;
794 for (i = 0; i < src->num_acpi_peripherals; i++) {
795 src_dev = &src->acpi_peripherals[i];
796 if (!acpi_dev_present(src_dev->hid, NULL, -1))
797 continue;
798
799 *acpi_dev = *src_dev;
800
801 /* We need to deep-copy properties */
802 if (src_dev->properties) {
803 acpi_dev->properties =
804 property_entries_dup(src_dev->properties);
805 if (IS_ERR(acpi_dev->properties)) {
806 error = PTR_ERR(acpi_dev->properties);
807 goto err_out;
808 }
809 }
810
811 acpi_dev++;
812 }
813
814 cros_laptop->acpi_peripherals = acpi_peripherals;
815 cros_laptop->num_acpi_peripherals = n_peripherals;
816
817 return 0;
818
819err_out:
820 while (--i >= 0) {
821 acpi_dev = &acpi_peripherals[i];
822 if (acpi_dev->properties)
823 property_entries_free(acpi_dev->properties);
824 }
825
826 kfree(acpi_peripherals);
827 return error;
828}
829
830static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
831{
832 const struct acpi_peripheral *acpi_dev;
833 struct i2c_peripheral *i2c_dev;
834 struct i2c_board_info *info;
835 int i;
836
837 for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
838 i2c_dev = &cros_laptop->i2c_peripherals[i];
839 info = &i2c_dev->board_info;
840
841 i2c_unregister_device(i2c_dev->client);
842 property_entries_free(info->properties);
843 }
844
845 for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
846 acpi_dev = &cros_laptop->acpi_peripherals[i];
847
848 property_entries_free(acpi_dev->properties);
849 }
850
851 kfree(cros_laptop->i2c_peripherals);
852 kfree(cros_laptop->acpi_peripherals);
853 kfree(cros_laptop);
854}
855
856static struct chromeos_laptop * __init
857chromeos_laptop_prepare(const struct chromeos_laptop *src)
858{
859 struct chromeos_laptop *cros_laptop;
860 int error;
861
862 cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL);
863 if (!cros_laptop)
864 return ERR_PTR(-ENOMEM);
865
866 error = chromeos_laptop_prepare_i2c_peripherals(cros_laptop, src);
867 if (!error)
868 error = chromeos_laptop_prepare_acpi_peripherals(cros_laptop,
869 src);
870
871 if (error) {
872 chromeos_laptop_destroy(cros_laptop);
873 return ERR_PTR(error);
874 }
875
876 return cros_laptop;
877}
878
879static int __init chromeos_laptop_init(void)
880{
881 const struct dmi_system_id *dmi_id;
882 int error;
883
884 dmi_id = dmi_first_match(chromeos_laptop_dmi_table);
885 if (!dmi_id) {
886 pr_debug("unsupported system\n");
887 return -ENODEV;
888 }
889
890 pr_debug("DMI Matched %s\n", dmi_id->ident);
891
892 cros_laptop = chromeos_laptop_prepare((void *)dmi_id->driver_data);
893 if (IS_ERR(cros_laptop))
894 return PTR_ERR(cros_laptop);
895
896 if (!cros_laptop->num_i2c_peripherals &&
897 !cros_laptop->num_acpi_peripherals) {
898 pr_debug("no relevant devices detected\n");
899 error = -ENODEV;
900 goto err_destroy_cros_laptop;
901 }
902
903 error = bus_register_notifier(&i2c_bus_type,
904 &chromeos_laptop_i2c_notifier);
905 if (error) {
906 pr_err("failed to register i2c bus notifier: %d\n",
907 error);
908 goto err_destroy_cros_laptop;
909 }
910
911 /*
912 * Scan adapters that have been registered and clients that have
913 * been created before we installed the notifier to make sure
914 * we do not miss any devices.
915 */
916 i2c_for_each_dev(NULL, chromeos_laptop_scan_peripherals);
917
918 return 0;
919
920err_destroy_cros_laptop:
921 chromeos_laptop_destroy(cros_laptop);
922 return error;
923}
924
925static void __exit chromeos_laptop_exit(void)
926{
927 bus_unregister_notifier(&i2c_bus_type, &chromeos_laptop_i2c_notifier);
928 chromeos_laptop_destroy(cros_laptop);
929}
930
931module_init(chromeos_laptop_init);
932module_exit(chromeos_laptop_exit);
933
934MODULE_DESCRIPTION("Chrome OS Laptop driver");
935MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
936MODULE_LICENSE("GPL");