This source file includes following definitions.
- chromes_laptop_instantiate_i2c_device
- chromeos_laptop_match_adapter_devid
- chromeos_laptop_check_adapter
- chromeos_laptop_adjust_client
- chromeos_laptop_detach_i2c_client
- chromeos_laptop_i2c_notifier_call
- chromeos_laptop_scan_peripherals
- chromeos_laptop_get_irq_from_dmi
- chromeos_laptop_setup_irq
- chromeos_laptop_prepare_i2c_peripherals
- chromeos_laptop_prepare_acpi_peripherals
- chromeos_laptop_destroy
- chromeos_laptop_prepare
- chromeos_laptop_init
- chromeos_laptop_exit
1
2
3
4
5
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
29 static 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
37 enum i2c_adapter_type {
38 I2C_ADAPTER_SMBUS = 0,
39 I2C_ADAPTER_VGADDC,
40 I2C_ADAPTER_PANEL,
41 I2C_ADAPTER_DESIGNWARE,
42 };
43
44 struct 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
58 struct acpi_peripheral {
59 char hid[ACPI_ID_LEN];
60 const struct property_entry *properties;
61 };
62
63 struct chromeos_laptop {
64
65
66
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
75 static const struct chromeos_laptop *cros_laptop;
76
77 static struct i2c_client *
78 chromes_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
87
88
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
120 static 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
131 static 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
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
160 static 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
192 static 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
205 static 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
227 static struct notifier_block chromeos_laptop_i2c_notifier = {
228 .notifier_call = chromeos_laptop_i2c_notifier_call,
229 };
230
231 #define DECLARE_CROS_LAPTOP(_name) \
232 static 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) \
238 static const struct chromeos_laptop _name __initconst = { \
239 .acpi_peripherals = _name##_peripherals, \
240 .num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \
241 }
242
243 static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = {
244
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
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 };
262 DECLARE_CROS_LAPTOP(samsung_series_5_550);
263
264 static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = {
265
266 {
267 .board_info = {
268 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
269 },
270 .type = I2C_ADAPTER_SMBUS,
271 },
272 };
273 DECLARE_CROS_LAPTOP(samsung_series_5);
274
275 static 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
284 static const struct property_entry
285 chromebook_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
291 static const struct property_entry
292 chromebook_atmel_touchscreen_props[] __initconst = {
293 PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"),
294 { }
295 };
296
297 static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
298
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
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
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 };
335 DECLARE_CROS_LAPTOP(chromebook_pixel);
336
337 static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = {
338
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 };
348 DECLARE_CROS_LAPTOP(hp_chromebook_14);
349
350 static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = {
351
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
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 };
370 DECLARE_CROS_LAPTOP(dell_chromebook_11);
371
372 static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = {
373
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 };
383 DECLARE_CROS_LAPTOP(toshiba_cb35);
384
385 static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = {
386
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 };
396 DECLARE_CROS_LAPTOP(acer_c7_chromebook);
397
398 static struct i2c_peripheral acer_ac700_peripherals[] __initdata = {
399
400 {
401 .board_info = {
402 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
403 },
404 .type = I2C_ADAPTER_SMBUS,
405 },
406 };
407 DECLARE_CROS_LAPTOP(acer_ac700);
408
409 static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
410
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
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
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
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 };
455 DECLARE_CROS_LAPTOP(acer_c720);
456
457 static struct i2c_peripheral
458 hp_pavilion_14_chromebook_peripherals[] __initdata = {
459
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 };
469 DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook);
470
471 static struct i2c_peripheral cr48_peripherals[] __initdata = {
472
473 {
474 .board_info = {
475 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
476 },
477 .type = I2C_ADAPTER_SMBUS,
478 },
479 };
480 DECLARE_CROS_LAPTOP(cr48);
481
482 static const u32 samus_touchpad_buttons[] __initconst = {
483 KEY_RESERVED,
484 KEY_RESERVED,
485 KEY_RESERVED,
486 BTN_LEFT
487 };
488
489 static 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
495 static struct acpi_peripheral samus_peripherals[] __initdata = {
496
497 {
498 .hid = "ATML0000",
499 .properties = samus_trackpad_props,
500 },
501
502 {
503 .hid = "ATML0001",
504 .properties = chromebook_atmel_touchscreen_props,
505 },
506 };
507 DECLARE_ACPI_CROS_LAPTOP(samus);
508
509 static struct acpi_peripheral generic_atmel_peripherals[] __initdata = {
510
511 {
512 .hid = "ATML0000",
513 .properties = chromebook_pixel_trackpad_props,
514 },
515
516 {
517 .hid = "ATML0001",
518 .properties = chromebook_atmel_touchscreen_props,
519 },
520 };
521 DECLARE_ACPI_CROS_LAPTOP(generic_atmel);
522
523 static 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
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
634
635
636
637 .ident = "Other Chromebook",
638 .matches = {
639
640
641
642
643
644 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
645 },
646 .driver_data = (void *)&generic_atmel,
647 },
648 { }
649 };
650 MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
651
652 static 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
662
663
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
676 static 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
696 static 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
715 static int __init
716 chromeos_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
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
757 err_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
768 static int __init
769 chromeos_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
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
819 err_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
830 static 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
856 static struct chromeos_laptop * __init
857 chromeos_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
879 static 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
913
914
915
916 i2c_for_each_dev(NULL, chromeos_laptop_scan_peripherals);
917
918 return 0;
919
920 err_destroy_cros_laptop:
921 chromeos_laptop_destroy(cros_laptop);
922 return error;
923 }
924
925 static 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
931 module_init(chromeos_laptop_init);
932 module_exit(chromeos_laptop_exit);
933
934 MODULE_DESCRIPTION("Chrome OS Laptop driver");
935 MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
936 MODULE_LICENSE("GPL");