onboard_usb_dev.c

  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, -EINVAL, "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_supplies, 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(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(onboard_dev->pdata->num_supplies,
105				    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(onboard_dev->pdata->reset_us);
113	gpiod_set_value_cansleep(onboard_dev->reset_gpio, 0);
114	fsleep(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(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(onboard_dev->reset_gpio, 1);
130
131	err = regulator_bulk_disable(onboard_dev->pdata->num_supplies,
132				     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(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(node->udev->bus->controller))
159			continue;
160
161		if (usb_wakeup_enabled_descendants(node->udev)) {
162			power_off = false;
163			break;
164		}
165	}
166
167	mutex_unlock(&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, "usb_dev.%s", dev_name(&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(&node->list, &onboard_dev->udev_list);
214
215	mutex_unlock(&onboard_dev->lock);
216
217	get_udev_link_name(udev, link_name, 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(&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, link_name, sizeof(link_name));
236	sysfs_remove_link(&onboard_dev->dev->kobj, 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(&node->list);
243			kfree(node);
244			break;
245		}
246	}
247
248	mutex_unlock(&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, "%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(buf, &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(&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(client->adapter, msg, 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(client->adapter, msg, 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(client->adapter, msg, 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(client->adapter, msg, 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(client->adapter, msg, 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, &reg);
404	if (ret)
405		return dev_err_probe(dev, ret, "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, reg);
410	if (ret)
411		return dev_err_probe(dev, ret, "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, ret, "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, 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(onboard_dev->clk))
454		return dev_err_probe(dev, PTR_ERR(onboard_dev->clk),
455				     "failed to get clock\n");
456
457	onboard_dev->reset_gpio = devm_gpiod_get_optional(dev, "reset",
458							  GPIOD_OUT_HIGH);
459	if (IS_ERR(onboard_dev->reset_gpio))
460		return dev_err_probe(dev, PTR_ERR(onboard_dev->reset_gpio),
461				     "failed to get reset GPIO\n");
462
463	mutex_init(&onboard_dev->lock);
464	INIT_LIST_HEAD(&onboard_dev->udev_list);
465
466	dev_set_drvdata(dev, onboard_dev);
467
468	err = onboard_dev_power_on(onboard_dev);
469	if (err)
470		return err;
471
472	i2c_node = of_parse_phandle(pdev->dev.of_node, "i2c-bus", 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(i2c_node);
478#endif
479		of_node_put(i2c_node);
480
481		if (!client) {
482			err = -EPROBE_DEFER;
483			goto err_power_off;
484		}
485
486		if (of_device_is_compatible(pdev->dev.of_node, "usb424,2744") ||
487		    of_device_is_compatible(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(&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(&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(&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(&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(&udev->dev);
536		mutex_unlock(&onboard_dev->lock);
537		device_release_driver(&udev->dev);
538		put_device(&udev->dev);
539		mutex_lock(&onboard_dev->lock);
540	}
541
542	mutex_unlock(&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(dev->of_node);
588	if (!pdev) {
589		np = of_parse_phandle(dev->of_node, "peer-hub", 0);
590		if (!np) {
591			dev_err(dev, "failed to find device node for peer hub\n");
592			return ERR_PTR(-EINVAL);
593		}
594
595		pdev = of_find_device_by_node(np);
596		of_node_put(np);
597
598		if (!pdev)
599			return ERR_PTR(-ENODEV);
600	}
601
602	onboard_dev = dev_get_drvdata(&pdev->dev);
603	put_device(&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(-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(onboard_dev))
632		return PTR_ERR(onboard_dev);
633
634	dev_set_drvdata(dev, 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(&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(&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");