dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / platform / chrome / chromeos_laptop.c
blob2b441e9ae593518dd7ac0ade3168e8928436f042
1 /*
2 * chromeos_laptop.c - Driver to instantiate Chromebook i2c/smbus devices.
4 * Author : Benson Leung <bleung@chromium.org>
6 * Copyright (C) 2012 Google, Inc.
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.
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.
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
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>
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
40 #define MAX_I2C_DEVICE_DEFERRALS 5
42 static struct i2c_client *als;
43 static struct i2c_client *tp;
44 static struct i2c_client *ts;
46 static 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",
54 /* Keep this enum consistent with i2c_adapter_names */
55 enum 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,
63 enum i2c_peripheral_state {
64 UNPROBED = 0,
65 PROBED,
66 TIMEDOUT,
69 struct 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;
76 #define MAX_I2C_PERIPHERALS 3
78 struct chromeos_laptop {
79 struct i2c_peripheral i2c_peripherals[MAX_I2C_PERIPHERALS];
82 static struct chromeos_laptop *cros_laptop;
84 static struct i2c_board_info cyapa_device = {
85 I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR),
86 .flags = I2C_CLIENT_WAKE,
89 static struct i2c_board_info isl_als_device = {
90 I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
93 static struct i2c_board_info tsl2583_als_device = {
94 I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR),
97 static struct i2c_board_info tsl2563_als_device = {
98 I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
101 static int mxt_t19_keys[] = {
102 KEY_RESERVED,
103 KEY_RESERVED,
104 KEY_RESERVED,
105 KEY_RESERVED,
106 KEY_RESERVED,
107 BTN_LEFT
110 static 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,
117 static 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,
123 static struct mxt_platform_data atmel_1664s_platform_data = {
124 .irqflags = IRQF_TRIGGER_FALLING,
125 .suspend_mode = MXT_SUSPEND_T9_CTRL,
128 static 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,
134 static 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)
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 };
146 if (bus < 0)
147 return NULL;
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.
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;
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;
166 info->irq = dev_data->instance;
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;
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.
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),
185 struct i2c_client *dummy;
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);
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);
204 i2c_put_adapter(adapter);
205 return client;
208 struct i2c_lookup {
209 const char *name;
210 int instance;
211 int n;
214 static int __find_i2c_adap(struct device *dev, void *data)
216 struct i2c_lookup *lookup = data;
217 static const char *prefix = "i2c-";
218 struct i2c_adapter *adapter;
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;
229 static int find_i2c_adapter_num(enum i2c_adapter_type type)
231 struct device *dev = NULL;
232 struct i2c_adapter *adapter;
233 struct i2c_lookup lookup;
235 memset(&lookup, 0, sizeof(lookup));
236 lookup.name = i2c_adapter_names[type];
237 lookup.instance = (type == I2C_ADAPTER_DESIGNWARE_1) ? 1 : 0;
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;
247 adapter = to_i2c_adapter(dev);
248 return adapter->nr;
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.
259 static 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)
265 return __add_probed_i2c_device(name,
266 find_i2c_adapter_num(type),
267 info,
268 addrs);
272 * Probes for a device at a single address, the one provided by
273 * info->addr.
274 * Returns NULL if no device found.
276 static struct i2c_client *add_i2c_device(const char *name,
277 enum i2c_adapter_type type,
278 struct i2c_board_info *info)
280 return __add_probed_i2c_device(name,
281 find_i2c_adapter_num(type),
282 info,
283 NULL);
286 static int setup_cyapa_tp(enum i2c_adapter_type type)
288 if (tp)
289 return 0;
291 /* add cyapa touchpad */
292 tp = add_i2c_device("trackpad", type, &cyapa_device);
293 return (!tp) ? -EAGAIN : 0;
296 static int setup_atmel_224s_tp(enum i2c_adapter_type type)
298 const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
299 I2C_CLIENT_END };
300 if (tp)
301 return 0;
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;
309 static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
311 const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
312 I2C_CLIENT_END };
313 if (ts)
314 return 0;
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;
322 static int setup_isl29018_als(enum i2c_adapter_type type)
324 if (als)
325 return 0;
327 /* add isl29018 light sensor */
328 als = add_i2c_device("lightsensor", type, &isl_als_device);
329 return (!als) ? -EAGAIN : 0;
332 static int setup_tsl2583_als(enum i2c_adapter_type type)
334 if (als)
335 return 0;
337 /* add tsl2583 light sensor */
338 als = add_i2c_device(NULL, type, &tsl2583_als_device);
339 return (!als) ? -EAGAIN : 0;
342 static int setup_tsl2563_als(enum i2c_adapter_type type)
344 if (als)
345 return 0;
347 /* add tsl2563 light sensor */
348 als = add_i2c_device(NULL, type, &tsl2563_als_device);
349 return (!als) ? -EAGAIN : 0;
352 static int __init chromeos_laptop_dmi_matched(const struct dmi_system_id *id)
354 cros_laptop = (void *)id->driver_data;
355 pr_debug("DMI Matched %s.\n", id->ident);
357 /* Indicate to dmi_scan that processing is done. */
358 return 1;
361 static int chromeos_laptop_probe(struct platform_device *pdev)
363 int i;
364 int ret = 0;
366 for (i = 0; i < MAX_I2C_PERIPHERALS; i++) {
367 struct i2c_peripheral *i2c_dev;
369 i2c_dev = &cros_laptop->i2c_peripherals[i];
371 /* No more peripherals. */
372 if (i2c_dev->add == NULL)
373 break;
375 if (i2c_dev->state == TIMEDOUT || i2c_dev->state == PROBED)
376 continue;
379 * Check that the i2c adapter is present.
380 * -EPROBE_DEFER if missing as the adapter may appear much
381 * later.
383 if (find_i2c_adapter_num(i2c_dev->type) == -ENODEV) {
384 ret = -EPROBE_DEFER;
385 continue;
388 /* Add the device. */
389 if (i2c_dev->add(i2c_dev->type) == -EAGAIN) {
391 * Set -EPROBE_DEFER a limited num of times
392 * if device is not successfully added.
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;
402 } else {
403 i2c_dev->state = PROBED;
407 return ret;
410 static 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 },
419 static struct chromeos_laptop samsung_series_5 = {
420 .i2c_peripherals = {
421 /* Light Sensor. */
422 { .add = setup_tsl2583_als, I2C_ADAPTER_SMBUS },
426 static 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 },
437 static struct chromeos_laptop hp_chromebook_14 = {
438 .i2c_peripherals = {
439 /* Touchpad. */
440 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
444 static struct chromeos_laptop dell_chromebook_11 = {
445 .i2c_peripherals = {
446 /* Touchpad. */
447 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
451 static struct chromeos_laptop toshiba_cb35 = {
452 .i2c_peripherals = {
453 /* Touchpad. */
454 { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
458 static struct chromeos_laptop acer_c7_chromebook = {
459 .i2c_peripherals = {
460 /* Touchpad. */
461 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
465 static struct chromeos_laptop acer_ac700 = {
466 .i2c_peripherals = {
467 /* Light Sensor. */
468 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
472 static 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 },
483 static struct chromeos_laptop hp_pavilion_14_chromebook = {
484 .i2c_peripherals = {
485 /* Touchpad. */
486 { .add = setup_cyapa_tp, I2C_ADAPTER_SMBUS },
490 static struct chromeos_laptop cr48 = {
491 .i2c_peripherals = {
492 /* Light Sensor. */
493 { .add = setup_tsl2563_als, I2C_ADAPTER_SMBUS },
497 #define _CBDD(board_) \
498 .callback = chromeos_laptop_dmi_matched, \
499 .driver_data = (void *)&board_
501 static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
503 .ident = "Samsung Series 5 550",
504 .matches = {
505 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"),
506 DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"),
508 _CBDD(samsung_series_5_550),
511 .ident = "Samsung Series 5",
512 .matches = {
513 DMI_MATCH(DMI_PRODUCT_NAME, "Alex"),
515 _CBDD(samsung_series_5),
518 .ident = "Chromebook Pixel",
519 .matches = {
520 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
521 DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
523 _CBDD(chromebook_pixel),
526 .ident = "Wolf",
527 .matches = {
528 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
529 DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
531 _CBDD(dell_chromebook_11),
534 .ident = "HP Chromebook 14",
535 .matches = {
536 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
537 DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
539 _CBDD(hp_chromebook_14),
542 .ident = "Toshiba CB35",
543 .matches = {
544 DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
545 DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
547 _CBDD(toshiba_cb35),
550 .ident = "Acer C7 Chromebook",
551 .matches = {
552 DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
554 _CBDD(acer_c7_chromebook),
557 .ident = "Acer AC700",
558 .matches = {
559 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
561 _CBDD(acer_ac700),
564 .ident = "Acer C720",
565 .matches = {
566 DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
568 _CBDD(acer_c720),
571 .ident = "HP Pavilion 14 Chromebook",
572 .matches = {
573 DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
575 _CBDD(hp_pavilion_14_chromebook),
578 .ident = "Cr-48",
579 .matches = {
580 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
582 _CBDD(cr48),
586 MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table);
588 static struct platform_device *cros_platform_device;
590 static struct platform_driver cros_platform_driver = {
591 .driver = {
592 .name = "chromeos_laptop",
594 .probe = chromeos_laptop_probe,
597 static int __init chromeos_laptop_init(void)
599 int ret;
601 if (!dmi_check_system(chromeos_laptop_dmi_table)) {
602 pr_debug("%s unsupported system.\n", __func__);
603 return -ENODEV;
606 ret = platform_driver_register(&cros_platform_driver);
607 if (ret)
608 return ret;
610 cros_platform_device = platform_device_alloc("chromeos_laptop", -1);
611 if (!cros_platform_device) {
612 ret = -ENOMEM;
613 goto fail_platform_device1;
616 ret = platform_device_add(cros_platform_device);
617 if (ret)
618 goto fail_platform_device2;
620 return 0;
622 fail_platform_device2:
623 platform_device_put(cros_platform_device);
624 fail_platform_device1:
625 platform_driver_unregister(&cros_platform_driver);
626 return ret;
629 static void __exit chromeos_laptop_exit(void)
631 if (als)
632 i2c_unregister_device(als);
633 if (tp)
634 i2c_unregister_device(tp);
635 if (ts)
636 i2c_unregister_device(ts);
638 platform_device_unregister(cros_platform_device);
639 platform_driver_unregister(&cros_platform_driver);
642 module_init(chromeos_laptop_init);
643 module_exit(chromeos_laptop_exit);
645 MODULE_DESCRIPTION("Chrome OS Laptop driver");
646 MODULE_AUTHOR("Benson Leung <bleung@chromium.org>");
647 MODULE_LICENSE("GPL");