1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for onboard USB devices
4 *
5 * Copyright (c) 2022, Google LLC
6 */
7
8#include <linux/clk.h>
9#include <linux/device.h>
10#include <linux/export.h>
11#include <linux/err.h>
12#include <linux/gpio/consumer.h>
13#include <linux/init.h>
14#include <linux/i2c.h>
15#include <linux/kernel.h>
16#include <linux/list.h>
17#include <linux/module.h>
18#include <linux/mutex.h>
19#include <linux/of.h>
20#include <linux/of_platform.h>
21#include <linux/platform_device.h>
22#include <linux/regulator/consumer.h>
23#include <linux/slab.h>
24#include <linux/suspend.h>
25#include <linux/sysfs.h>
26#include <linux/usb.h>
27#include <linux/usb/hcd.h>
28#include <linux/usb/onboard_dev.h>
29#include <linux/workqueue.h>
30
31#include "onboard_usb_dev.h"
32
33/* USB5744 register offset and mask */
34#define USB5744_CMD_ATTACH 0xAA
35#define USB5744_CMD_ATTACH_LSB 0x56
36#define USB5744_CMD_CREG_ACCESS 0x99
37#define USB5744_CMD_CREG_ACCESS_LSB 0x37
38#define USB5744_CREG_MEM_ADDR 0x00
39#define USB5744_CREG_MEM_RD_ADDR 0x04
40#define USB5744_CREG_WRITE 0x00
41#define USB5744_CREG_READ 0x01
42#define USB5744_CREG_RUNTIMEFLAGS2 0x411D
43#define USB5744_CREG_BYPASS_UDC_SUSPEND BIT(3)
44
45static void onboard_dev_attach_usb_driver(struct work_struct *work);
46
47static struct usb_device_driver onboard_dev_usbdev_driver;
48static DECLARE_WORK(attach_usb_driver_work, onboard_dev_attach_usb_driver);
49
50/************************** Platform driver **************************/
51
52struct usbdev_node {
53 struct usb_device *udev;
54 struct list_head list;
55};
56
57struct onboard_dev {
58 struct regulator_bulk_data supplies[MAX_SUPPLIES];
59 struct device *dev;
60 const struct onboard_dev_pdata *pdata;
61 struct gpio_desc *reset_gpio;
62 bool always_powered_in_suspend;
63 bool is_powered_on;
64 bool going_away;
65 struct list_head udev_list;
66 struct mutex lock;
67 struct clk *clk;
68};
69
70static int onboard_dev_get_regulators(struct onboard_dev *onboard_dev)
71{
72 const char * const *supply_names = onboard_dev->pdata->supply_names;
73 unsigned int num_supplies = onboard_dev->pdata->num_supplies;
74 struct device *dev = onboard_dev->dev;
75 unsigned int i;
76 int err;
77
78 if (num_supplies > MAX_SUPPLIES)
79 return dev_err_probe(dev, err: -EINVAL, fmt: "max %d supplies supported!\n",
80 MAX_SUPPLIES);
81
82 for (i = 0; i < num_supplies; i++)
83 onboard_dev->supplies[i].supply = supply_names[i];
84
85 err = devm_regulator_bulk_get(dev, num_consumers: num_supplies, consumers: onboard_dev->supplies);
86 if (err)
87 dev_err(dev, "Failed to get regulator supplies: %pe\n",
88 ERR_PTR(err));
89
90 return err;
91}
92
93static int onboard_dev_power_on(struct onboard_dev *onboard_dev)
94{
95 int err;
96
97 err = clk_prepare_enable(clk: onboard_dev->clk);
98 if (err) {
99 dev_err(onboard_dev->dev, "failed to enable clock: %pe\n",
100 ERR_PTR(err));
101 return err;
102 }
103
104 err = regulator_bulk_enable(num_consumers: onboard_dev->pdata->num_supplies,
105 consumers: onboard_dev->supplies);
106 if (err) {
107 dev_err(onboard_dev->dev, "failed to enable supplies: %pe\n",
108 ERR_PTR(err));
109 goto disable_clk;
110 }
111
112 fsleep(usecs: onboard_dev->pdata->reset_us);
113 gpiod_set_value_cansleep(desc: onboard_dev->reset_gpio, value: 0);
114 fsleep(usecs: onboard_dev->pdata->power_on_delay_us);
115
116 onboard_dev->is_powered_on = true;
117
118 return 0;
119
120disable_clk:
121 clk_disable_unprepare(clk: onboard_dev->clk);
122 return err;
123}
124
125static int onboard_dev_power_off(struct onboard_dev *onboard_dev)
126{
127 int err;
128
129 gpiod_set_value_cansleep(desc: onboard_dev->reset_gpio, value: 1);
130
131 err = regulator_bulk_disable(num_consumers: onboard_dev->pdata->num_supplies,
132 consumers: onboard_dev->supplies);
133 if (err) {
134 dev_err(onboard_dev->dev, "failed to disable supplies: %pe\n",
135 ERR_PTR(err));
136 return err;
137 }
138
139 clk_disable_unprepare(clk: onboard_dev->clk);
140
141 onboard_dev->is_powered_on = false;
142
143 return 0;
144}
145
146static int __maybe_unused onboard_dev_suspend(struct device *dev)
147{
148 struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
149 struct usbdev_node *node;
150 bool power_off = true;
151
152 if (onboard_dev->always_powered_in_suspend)
153 return 0;
154
155 mutex_lock(&onboard_dev->lock);
156
157 list_for_each_entry(node, &onboard_dev->udev_list, list) {
158 if (!device_may_wakeup(dev: node->udev->bus->controller))
159 continue;
160
161 if (usb_wakeup_enabled_descendants(udev: node->udev)) {
162 power_off = false;
163 break;
164 }
165 }
166
167 mutex_unlock(lock: &onboard_dev->lock);
168
169 if (!power_off)
170 return 0;
171
172 return onboard_dev_power_off(onboard_dev);
173}
174
175static int __maybe_unused onboard_dev_resume(struct device *dev)
176{
177 struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
178
179 if (onboard_dev->is_powered_on)
180 return 0;
181
182 return onboard_dev_power_on(onboard_dev);
183}
184
185static inline void get_udev_link_name(const struct usb_device *udev, char *buf,
186 size_t size)
187{
188 snprintf(buf, size, fmt: "usb_dev.%s", dev_name(dev: &udev->dev));
189}
190
191static int onboard_dev_add_usbdev(struct onboard_dev *onboard_dev,
192 struct usb_device *udev)
193{
194 struct usbdev_node *node;
195 char link_name[64];
196 int err;
197
198 mutex_lock(&onboard_dev->lock);
199
200 if (onboard_dev->going_away) {
201 err = -EINVAL;
202 goto error;
203 }
204
205 node = kzalloc(sizeof(*node), GFP_KERNEL);
206 if (!node) {
207 err = -ENOMEM;
208 goto error;
209 }
210
211 node->udev = udev;
212
213 list_add(new: &node->list, head: &onboard_dev->udev_list);
214
215 mutex_unlock(lock: &onboard_dev->lock);
216
217 get_udev_link_name(udev, buf: link_name, size: sizeof(link_name));
218 WARN_ON(sysfs_create_link(&onboard_dev->dev->kobj, &udev->dev.kobj,
219 link_name));
220
221 return 0;
222
223error:
224 mutex_unlock(lock: &onboard_dev->lock);
225
226 return err;
227}
228
229static void onboard_dev_remove_usbdev(struct onboard_dev *onboard_dev,
230 const struct usb_device *udev)
231{
232 struct usbdev_node *node;
233 char link_name[64];
234
235 get_udev_link_name(udev, buf: link_name, size: sizeof(link_name));
236 sysfs_remove_link(kobj: &onboard_dev->dev->kobj, name: link_name);
237
238 mutex_lock(&onboard_dev->lock);
239
240 list_for_each_entry(node, &onboard_dev->udev_list, list) {
241 if (node->udev == udev) {
242 list_del(entry: &node->list);
243 kfree(objp: node);
244 break;
245 }
246 }
247
248 mutex_unlock(lock: &onboard_dev->lock);
249}
250
251static ssize_t always_powered_in_suspend_show(struct device *dev,
252 struct device_attribute *attr,
253 char *buf)
254{
255 const struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
256
257 return sysfs_emit(buf, fmt: "%d\n", onboard_dev->always_powered_in_suspend);
258}
259
260static ssize_t always_powered_in_suspend_store(struct device *dev,
261 struct device_attribute *attr,
262 const char *buf, size_t count)
263{
264 struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
265 bool val;
266 int ret;
267
268 ret = kstrtobool(s: buf, res: &val);
269 if (ret < 0)
270 return ret;
271
272 onboard_dev->always_powered_in_suspend = val;
273
274 return count;
275}
276static DEVICE_ATTR_RW(always_powered_in_suspend);
277
278static struct attribute *onboard_dev_attrs[] = {
279 &dev_attr_always_powered_in_suspend.attr,
280 NULL,
281};
282
283static umode_t onboard_dev_attrs_are_visible(struct kobject *kobj,
284 struct attribute *attr,
285 int n)
286{
287 struct device *dev = kobj_to_dev(kobj);
288 struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
289
290 if (attr == &dev_attr_always_powered_in_suspend.attr &&
291 !onboard_dev->pdata->is_hub)
292 return 0;
293
294 return attr->mode;
295}
296
297static const struct attribute_group onboard_dev_group = {
298 .is_visible = onboard_dev_attrs_are_visible,
299 .attrs = onboard_dev_attrs,
300};
301__ATTRIBUTE_GROUPS(onboard_dev);
302
303
304static void onboard_dev_attach_usb_driver(struct work_struct *work)
305{
306 int err;
307
308 err = driver_attach(drv: &onboard_dev_usbdev_driver.driver);
309 if (err)
310 pr_err("Failed to attach USB driver: %pe\n", ERR_PTR(err));
311}
312
313#if IS_ENABLED(CONFIG_USB_ONBOARD_DEV_USB5744)
314static int onboard_dev_5744_i2c_read_byte(struct i2c_client *client, u16 addr, u8 *data)
315{
316 struct i2c_msg msg[2];
317 u8 rd_buf[3];
318 int ret;
319
320 u8 wr_buf[7] = {0, USB5744_CREG_MEM_ADDR, 4,
321 USB5744_CREG_READ, 1,
322 addr >> 8 & 0xff,
323 addr & 0xff};
324 msg[0].addr = client->addr;
325 msg[0].flags = 0;
326 msg[0].len = sizeof(wr_buf);
327 msg[0].buf = wr_buf;
328
329 ret = i2c_transfer(adap: client->adapter, msgs: msg, num: 1);
330 if (ret < 0)
331 return ret;
332
333 wr_buf[0] = USB5744_CMD_CREG_ACCESS;
334 wr_buf[1] = USB5744_CMD_CREG_ACCESS_LSB;
335 wr_buf[2] = 0;
336 msg[0].len = 3;
337
338 ret = i2c_transfer(adap: client->adapter, msgs: msg, num: 1);
339 if (ret < 0)
340 return ret;
341
342 wr_buf[0] = 0;
343 wr_buf[1] = USB5744_CREG_MEM_RD_ADDR;
344 msg[0].len = 2;
345
346 msg[1].addr = client->addr;
347 msg[1].flags = I2C_M_RD;
348 msg[1].len = 2;
349 msg[1].buf = rd_buf;
350
351 ret = i2c_transfer(adap: client->adapter, msgs: msg, num: 2);
352 if (ret < 0)
353 return ret;
354 *data = rd_buf[1];
355
356 return 0;
357}
358
359static int onboard_dev_5744_i2c_write_byte(struct i2c_client *client, u16 addr, u8 data)
360{
361 struct i2c_msg msg[2];
362 int ret;
363
364 u8 wr_buf[8] = {0, USB5744_CREG_MEM_ADDR, 5,
365 USB5744_CREG_WRITE, 1,
366 addr >> 8 & 0xff,
367 addr & 0xff,
368 data};
369 msg[0].addr = client->addr;
370 msg[0].flags = 0;
371 msg[0].len = sizeof(wr_buf);
372 msg[0].buf = wr_buf;
373
374 ret = i2c_transfer(adap: client->adapter, msgs: msg, num: 1);
375 if (ret < 0)
376 return ret;
377
378 msg[0].len = 3;
379 wr_buf[0] = USB5744_CMD_CREG_ACCESS;
380 wr_buf[1] = USB5744_CMD_CREG_ACCESS_LSB;
381 wr_buf[2] = 0;
382
383 ret = i2c_transfer(adap: client->adapter, msgs: msg, num: 1);
384 if (ret < 0)
385 return ret;
386
387 return 0;
388}
389
390static int onboard_dev_5744_i2c_init(struct i2c_client *client)
391{
392 struct device *dev = &client->dev;
393 int ret;
394 u8 reg;
395
396 /*
397 * Set BYPASS_UDC_SUSPEND bit to ensure MCU is always enabled
398 * and ready to respond to SMBus runtime commands.
399 * The command writes 5 bytes to memory and single data byte in
400 * configuration register.
401 */
402 ret = onboard_dev_5744_i2c_read_byte(client,
403 USB5744_CREG_RUNTIMEFLAGS2, data: &reg);
404 if (ret)
405 return dev_err_probe(dev, err: ret, fmt: "CREG_RUNTIMEFLAGS2 read failed\n");
406
407 reg |= USB5744_CREG_BYPASS_UDC_SUSPEND;
408 ret = onboard_dev_5744_i2c_write_byte(client,
409 USB5744_CREG_RUNTIMEFLAGS2, data: reg);
410 if (ret)
411 return dev_err_probe(dev, err: ret, fmt: "BYPASS_UDC_SUSPEND bit configuration failed\n");
412
413 /* Send SMBus command to boot hub. */
414 ret = i2c_smbus_write_word_data(client, USB5744_CMD_ATTACH,
415 USB5744_CMD_ATTACH_LSB);
416 if (ret < 0)
417 return dev_err_probe(dev, err: ret, fmt: "USB Attach with SMBus command failed\n");
418
419 return ret;
420}
421#else
422static int onboard_dev_5744_i2c_init(struct i2c_client *client)
423{
424 return -ENODEV;
425}
426#endif
427
428static int onboard_dev_probe(struct platform_device *pdev)
429{
430 struct device *dev = &pdev->dev;
431 struct onboard_dev *onboard_dev;
432 struct device_node *i2c_node;
433 int err;
434
435 onboard_dev = devm_kzalloc(dev, size: sizeof(*onboard_dev), GFP_KERNEL);
436 if (!onboard_dev)
437 return -ENOMEM;
438
439 onboard_dev->pdata = device_get_match_data(dev);
440 if (!onboard_dev->pdata)
441 return -EINVAL;
442
443 if (!onboard_dev->pdata->is_hub)
444 onboard_dev->always_powered_in_suspend = true;
445
446 onboard_dev->dev = dev;
447
448 err = onboard_dev_get_regulators(onboard_dev);
449 if (err)
450 return err;
451
452 onboard_dev->clk = devm_clk_get_optional(dev, NULL);
453 if (IS_ERR(ptr: onboard_dev->clk))
454 return dev_err_probe(dev, err: PTR_ERR(ptr: onboard_dev->clk),
455 fmt: "failed to get clock\n");
456
457 onboard_dev->reset_gpio = devm_gpiod_get_optional(dev, con_id: "reset",
458 flags: GPIOD_OUT_HIGH);
459 if (IS_ERR(ptr: onboard_dev->reset_gpio))
460 return dev_err_probe(dev, err: PTR_ERR(ptr: onboard_dev->reset_gpio),
461 fmt: "failed to get reset GPIO\n");
462
463 mutex_init(&onboard_dev->lock);
464 INIT_LIST_HEAD(list: &onboard_dev->udev_list);
465
466 dev_set_drvdata(dev, data: onboard_dev);
467
468 err = onboard_dev_power_on(onboard_dev);
469 if (err)
470 return err;
471
472 i2c_node = of_parse_phandle(np: pdev->dev.of_node, phandle_name: "i2c-bus", index: 0);
473 if (i2c_node) {
474 struct i2c_client *client = NULL;
475
476#if IS_ENABLED(CONFIG_USB_ONBOARD_DEV_USB5744)
477 client = of_find_i2c_device_by_node(node: i2c_node);
478#endif
479 of_node_put(node: i2c_node);
480
481 if (!client) {
482 err = -EPROBE_DEFER;
483 goto err_power_off;
484 }
485
486 if (of_device_is_compatible(device: pdev->dev.of_node, "usb424,2744") ||
487 of_device_is_compatible(device: pdev->dev.of_node, "usb424,5744")) {
488 err = onboard_dev_5744_i2c_init(client);
489 onboard_dev->always_powered_in_suspend = true;
490 }
491
492 put_device(dev: &client->dev);
493 if (err < 0)
494 goto err_power_off;
495 }
496
497 /*
498 * The USB driver might have been detached from the USB devices by
499 * onboard_dev_remove() (e.g. through an 'unbind' by userspace),
500 * make sure to re-attach it if needed.
501 *
502 * This needs to be done deferred to avoid self-deadlocks on systems
503 * with nested onboard hubs.
504 */
505 schedule_work(work: &attach_usb_driver_work);
506
507 return 0;
508
509err_power_off:
510 onboard_dev_power_off(onboard_dev);
511 return err;
512}
513
514static void onboard_dev_remove(struct platform_device *pdev)
515{
516 struct onboard_dev *onboard_dev = dev_get_drvdata(dev: &pdev->dev);
517 struct usbdev_node *node;
518 struct usb_device *udev;
519
520 onboard_dev->going_away = true;
521
522 mutex_lock(&onboard_dev->lock);
523
524 /* unbind the USB devices to avoid dangling references to this device */
525 while (!list_empty(head: &onboard_dev->udev_list)) {
526 node = list_first_entry(&onboard_dev->udev_list,
527 struct usbdev_node, list);
528 udev = node->udev;
529
530 /*
531 * Unbinding the driver will call onboard_dev_remove_usbdev(),
532 * which acquires onboard_dev->lock. We must release the lock
533 * first.
534 */
535 get_device(dev: &udev->dev);
536 mutex_unlock(lock: &onboard_dev->lock);
537 device_release_driver(dev: &udev->dev);
538 put_device(dev: &udev->dev);
539 mutex_lock(&onboard_dev->lock);
540 }
541
542 mutex_unlock(lock: &onboard_dev->lock);
543
544 onboard_dev_power_off(onboard_dev);
545}
546
547MODULE_DEVICE_TABLE(of, onboard_dev_match);
548
549static const struct dev_pm_ops __maybe_unused onboard_dev_pm_ops = {
550 SET_LATE_SYSTEM_SLEEP_PM_OPS(onboard_dev_suspend, onboard_dev_resume)
551};
552
553static struct platform_driver onboard_dev_driver = {
554 .probe = onboard_dev_probe,
555 .remove = onboard_dev_remove,
556
557 .driver = {
558 .name = "onboard-usb-dev",
559 .of_match_table = onboard_dev_match,
560 .pm = pm_ptr(&onboard_dev_pm_ops),
561 .dev_groups = onboard_dev_groups,
562 },
563};
564
565/************************** USB driver **************************/
566
567#define VENDOR_ID_BISON 0x5986
568#define VENDOR_ID_CYPRESS 0x04b4
569#define VENDOR_ID_GENESYS 0x05e3
570#define VENDOR_ID_MICROCHIP 0x0424
571#define VENDOR_ID_PARADE 0x1da0
572#define VENDOR_ID_REALTEK 0x0bda
573#define VENDOR_ID_TI 0x0451
574#define VENDOR_ID_VIA 0x2109
575#define VENDOR_ID_XMOS 0x20B1
576
577/*
578 * Returns the onboard_dev platform device that is associated with the USB
579 * device passed as parameter.
580 */
581static struct onboard_dev *_find_onboard_dev(struct device *dev)
582{
583 struct platform_device *pdev;
584 struct device_node *np;
585 struct onboard_dev *onboard_dev;
586
587 pdev = of_find_device_by_node(np: dev->of_node);
588 if (!pdev) {
589 np = of_parse_phandle(np: dev->of_node, phandle_name: "peer-hub", index: 0);
590 if (!np) {
591 dev_err(dev, "failed to find device node for peer hub\n");
592 return ERR_PTR(error: -EINVAL);
593 }
594
595 pdev = of_find_device_by_node(np);
596 of_node_put(node: np);
597
598 if (!pdev)
599 return ERR_PTR(error: -ENODEV);
600 }
601
602 onboard_dev = dev_get_drvdata(dev: &pdev->dev);
603 put_device(dev: &pdev->dev);
604
605 /*
606 * The presence of drvdata indicates that the platform driver finished
607 * probing. This handles the case where (conceivably) we could be
608 * running at the exact same time as the platform driver's probe. If
609 * we detect the race we request probe deferral and we'll come back and
610 * try again.
611 */
612 if (!onboard_dev)
613 return ERR_PTR(error: -EPROBE_DEFER);
614
615 return onboard_dev;
616}
617
618static bool onboard_dev_usbdev_match(struct usb_device *udev)
619{
620 /* Onboard devices using this driver must have a device tree node */
621 return !!udev->dev.of_node;
622}
623
624static int onboard_dev_usbdev_probe(struct usb_device *udev)
625{
626 struct device *dev = &udev->dev;
627 struct onboard_dev *onboard_dev;
628 int err;
629
630 onboard_dev = _find_onboard_dev(dev);
631 if (IS_ERR(ptr: onboard_dev))
632 return PTR_ERR(ptr: onboard_dev);
633
634 dev_set_drvdata(dev, data: onboard_dev);
635
636 err = onboard_dev_add_usbdev(onboard_dev, udev);
637 if (err)
638 return err;
639
640 return 0;
641}
642
643static void onboard_dev_usbdev_disconnect(struct usb_device *udev)
644{
645 struct onboard_dev *onboard_dev = dev_get_drvdata(dev: &udev->dev);
646
647 onboard_dev_remove_usbdev(onboard_dev, udev);
648}
649
650static const struct usb_device_id onboard_dev_id_table[] = {
651 { USB_DEVICE(VENDOR_ID_BISON, 0x1198) }, /* Bison Electronics Inc. Integrated Camera */
652 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6500) }, /* CYUSB330x 3.0 HUB */
653 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6502) }, /* CYUSB330x 2.0 HUB */
654 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6503) }, /* CYUSB33{0,1}x 2.0 HUB, Vendor Mode */
655 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6504) }, /* CYUSB331x 3.0 HUB */
656 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6506) }, /* CYUSB331x 2.0 HUB */
657 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6507) }, /* CYUSB332x 2.0 HUB, Vendor Mode */
658 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6508) }, /* CYUSB332x 3.0 HUB */
659 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x650a) }, /* CYUSB332x 2.0 HUB */
660 { USB_DEVICE(VENDOR_ID_CYPRESS, 0x6570) }, /* CY7C6563x 2.0 HUB */
661 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0608) }, /* Genesys Logic GL850G USB 2.0 HUB */
662 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0610) }, /* Genesys Logic GL852G USB 2.0 HUB */
663 { USB_DEVICE(VENDOR_ID_GENESYS, 0x0620) }, /* Genesys Logic GL3523 USB 3.1 HUB */
664 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2412) }, /* USB2412 USB 2.0 HUB */
665 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2514) }, /* USB2514B USB 2.0 HUB */
666 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2517) }, /* USB2517 USB 2.0 HUB */
667 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x2744) }, /* USB5744 USB 2.0 HUB */
668 { USB_DEVICE(VENDOR_ID_MICROCHIP, 0x5744) }, /* USB5744 USB 3.0 HUB */
669 { USB_DEVICE(VENDOR_ID_PARADE, 0x5511) }, /* PS5511 USB 3.2 */
670 { USB_DEVICE(VENDOR_ID_PARADE, 0x55a1) }, /* PS5511 USB 2.0 */
671 { USB_DEVICE(VENDOR_ID_REALTEK, 0x0411) }, /* RTS5411 USB 3.1 HUB */
672 { USB_DEVICE(VENDOR_ID_REALTEK, 0x5411) }, /* RTS5411 USB 2.1 HUB */
673 { USB_DEVICE(VENDOR_ID_REALTEK, 0x0414) }, /* RTS5414 USB 3.2 HUB */
674 { USB_DEVICE(VENDOR_ID_REALTEK, 0x5414) }, /* RTS5414 USB 2.1 HUB */
675 { USB_DEVICE(VENDOR_ID_REALTEK, 0x0179) }, /* RTL8188ETV 2.4GHz WiFi */
676 { USB_DEVICE(VENDOR_ID_TI, 0x8025) }, /* TI USB8020B 3.0 HUB */
677 { USB_DEVICE(VENDOR_ID_TI, 0x8027) }, /* TI USB8020B 2.0 HUB */
678 { USB_DEVICE(VENDOR_ID_TI, 0x8140) }, /* TI USB8041 3.0 HUB */
679 { USB_DEVICE(VENDOR_ID_TI, 0x8142) }, /* TI USB8041 2.0 HUB */
680 { USB_DEVICE(VENDOR_ID_TI, 0x8440) }, /* TI USB8044 3.0 HUB */
681 { USB_DEVICE(VENDOR_ID_TI, 0x8442) }, /* TI USB8044 2.0 HUB */
682 { USB_DEVICE(VENDOR_ID_VIA, 0x0817) }, /* VIA VL817 3.1 HUB */
683 { USB_DEVICE(VENDOR_ID_VIA, 0x2817) }, /* VIA VL817 2.0 HUB */
684 { USB_DEVICE(VENDOR_ID_XMOS, 0x0013) }, /* XMOS XVF3500 Voice Processor */
685 {}
686};
687MODULE_DEVICE_TABLE(usb, onboard_dev_id_table);
688
689static struct usb_device_driver onboard_dev_usbdev_driver = {
690 .name = "onboard-usb-dev",
691 .match = onboard_dev_usbdev_match,
692 .probe = onboard_dev_usbdev_probe,
693 .disconnect = onboard_dev_usbdev_disconnect,
694 .generic_subclass = 1,
695 .supports_autosuspend = 1,
696 .id_table = onboard_dev_id_table,
697};
698
699static int __init onboard_dev_init(void)
700{
701 int ret;
702
703 ret = usb_register_device_driver(&onboard_dev_usbdev_driver, THIS_MODULE);
704 if (ret)
705 return ret;
706
707 ret = platform_driver_register(&onboard_dev_driver);
708 if (ret)
709 usb_deregister_device_driver(&onboard_dev_usbdev_driver);
710
711 return ret;
712}
713module_init(onboard_dev_init);
714
715static void __exit onboard_dev_exit(void)
716{
717 usb_deregister_device_driver(&onboard_dev_usbdev_driver);
718 platform_driver_unregister(&onboard_dev_driver);
719
720 cancel_work_sync(work: &attach_usb_driver_work);
721}
722module_exit(onboard_dev_exit);
723
724MODULE_AUTHOR("Matthias Kaehlcke <mka@chromium.org>");
725MODULE_DESCRIPTION("Driver for discrete onboard USB devices");
726MODULE_LICENSE("GPL v2");
727

source code of linux/drivers/usb/misc/onboard_usb_dev.c