[deliverable/linux.git] / drivers / usb / gadget / legacy / dbgp.c

/*
 * dbgp.c -- EHCI Debug Port device gadget
 *
 * Copyright (C) 2010 Stephane Duverger
 *
 * Released under the GPLv2.
 */

/* verbose messages */
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>

#include "u_serial.h"

#define DRIVER_VENDOR_ID	0x0525 /* NetChip */
#define DRIVER_PRODUCT_ID	0xc0de /* undefined */

#define USB_DEBUG_MAX_PACKET_SIZE     8
#define DBGP_REQ_EP0_LEN              128
#define DBGP_REQ_LEN                  512

static struct dbgp {
	struct usb_gadget  *gadget;
	struct usb_request *req;
	struct usb_ep      *i_ep;
	struct usb_ep      *o_ep;
#ifdef CONFIG_USB_G_DBGP_SERIAL
	struct gserial     *serial;
#endif
} dbgp;

static struct usb_device_descriptor device_desc = {
	.bLength = sizeof device_desc,
	.bDescriptorType = USB_DT_DEVICE,
	.bcdUSB = cpu_to_le16(0x0200),
	.bDeviceClass =	USB_CLASS_VENDOR_SPEC,
	.idVendor = cpu_to_le16(DRIVER_VENDOR_ID),
	.idProduct = cpu_to_le16(DRIVER_PRODUCT_ID),
	.bNumConfigurations = 1,
};

static struct usb_debug_descriptor dbg_desc = {
	.bLength = sizeof dbg_desc,
	.bDescriptorType = USB_DT_DEBUG,
};

static struct usb_endpoint_descriptor i_desc = {
	.bLength = USB_DT_ENDPOINT_SIZE,
	.bDescriptorType = USB_DT_ENDPOINT,
	.bmAttributes = USB_ENDPOINT_XFER_BULK,
	.bEndpointAddress = USB_DIR_IN,
};

static struct usb_endpoint_descriptor o_desc = {
	.bLength = USB_DT_ENDPOINT_SIZE,
	.bDescriptorType = USB_DT_ENDPOINT,
	.bmAttributes = USB_ENDPOINT_XFER_BULK,
	.bEndpointAddress = USB_DIR_OUT,
};

#ifdef CONFIG_USB_G_DBGP_PRINTK
static int dbgp_consume(char *buf, unsigned len)
{
	char c;

	if (!len)
		return 0;

	c = buf[len-1];
	if (c != 0)
		buf[len-1] = 0;

	printk(KERN_NOTICE "%s%c", buf, c);
	return 0;
}

static void __disable_ep(struct usb_ep *ep)
{
	usb_ep_disable(ep);
}

static void dbgp_disable_ep(void)
{
	__disable_ep(dbgp.i_ep);
	__disable_ep(dbgp.o_ep);
}

static void dbgp_complete(struct usb_ep *ep, struct usb_request *req)
{
	int stp;
	int err = 0;
	int status = req->status;

	if (ep == dbgp.i_ep) {
		stp = 1;
		goto fail;
	}

	if (status != 0) {
		stp = 2;
		goto release_req;
	}

	dbgp_consume(req->buf, req->actual);

	req->length = DBGP_REQ_LEN;
	err = usb_ep_queue(ep, req, GFP_ATOMIC);
	if (err < 0) {
		stp = 3;
		goto release_req;
	}

	return;

release_req:
	kfree(req->buf);
	usb_ep_free_request(dbgp.o_ep, req);
	dbgp_disable_ep();
fail:
	dev_dbg(&dbgp.gadget->dev,
		"complete: failure (%d:%d) ==> %d\n", stp, err, status);
}

static int dbgp_enable_ep_req(struct usb_ep *ep)
{
	int err, stp;
	struct usb_request *req;

	req = usb_ep_alloc_request(ep, GFP_KERNEL);
	if (!req) {
		err = -ENOMEM;
		stp = 1;
		goto fail_1;
	}

	req->buf = kmalloc(DBGP_REQ_LEN, GFP_KERNEL);
	if (!req->buf) {
		err = -ENOMEM;
		stp = 2;
		goto fail_2;
	}

	req->complete = dbgp_complete;
	req->length = DBGP_REQ_LEN;
	err = usb_ep_queue(ep, req, GFP_ATOMIC);
	if (err < 0) {
		stp = 3;
		goto fail_3;
	}

	return 0;

fail_3:
	kfree(req->buf);
fail_2:
	usb_ep_free_request(dbgp.o_ep, req);
fail_1:
	dev_dbg(&dbgp.gadget->dev,
		"enable ep req: failure (%d:%d)\n", stp, err);
	return err;
}

static int __enable_ep(struct usb_ep *ep, struct usb_endpoint_descriptor *desc)
{
	int err;
	ep->desc = desc;
	err = usb_ep_enable(ep);
	return err;
}

static int dbgp_enable_ep(void)
{
	int err, stp;

	err = __enable_ep(dbgp.i_ep, &i_desc);
	if (err < 0) {
		stp = 1;
		goto fail_1;
	}

	err = __enable_ep(dbgp.o_ep, &o_desc);
	if (err < 0) {
		stp = 2;
		goto fail_2;
	}

	err = dbgp_enable_ep_req(dbgp.o_ep);
	if (err < 0) {
		stp = 3;
		goto fail_3;
	}

	return 0;

fail_3:
	__disable_ep(dbgp.o_ep);
fail_2:
	__disable_ep(dbgp.i_ep);
fail_1:
	dev_dbg(&dbgp.gadget->dev, "enable ep: failure (%d:%d)\n", stp, err);
	return err;
}
#endif

static void dbgp_disconnect(struct usb_gadget *gadget)
{
#ifdef CONFIG_USB_G_DBGP_PRINTK
	dbgp_disable_ep();
#else
	gserial_disconnect(dbgp.serial);
#endif
}

static void dbgp_unbind(struct usb_gadget *gadget)
{
#ifdef CONFIG_USB_G_DBGP_SERIAL
	kfree(dbgp.serial);
	dbgp.serial = NULL;
#endif
	if (dbgp.req) {
		kfree(dbgp.req->buf);
		usb_ep_free_request(gadget->ep0, dbgp.req);
		dbgp.req = NULL;
	}
}

#ifdef CONFIG_USB_G_DBGP_SERIAL
static unsigned char tty_line;
#endif

static int dbgp_configure_endpoints(struct usb_gadget *gadget)
{
	int stp;

	usb_ep_autoconfig_reset(gadget);

	dbgp.i_ep = usb_ep_autoconfig(gadget, &i_desc);
	if (!dbgp.i_ep) {
		stp = 1;
		goto fail_1;
	}

	i_desc.wMaxPacketSize =
		cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);

	dbgp.o_ep = usb_ep_autoconfig(gadget, &o_desc);
	if (!dbgp.o_ep) {
		stp = 2;
		goto fail_1;
	}

	o_desc.wMaxPacketSize =
		cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);

	dbg_desc.bDebugInEndpoint = i_desc.bEndpointAddress;
	dbg_desc.bDebugOutEndpoint = o_desc.bEndpointAddress;

#ifdef CONFIG_USB_G_DBGP_SERIAL
	dbgp.serial->in = dbgp.i_ep;
	dbgp.serial->out = dbgp.o_ep;

	dbgp.serial->in->desc = &i_desc;
	dbgp.serial->out->desc = &o_desc;
#endif

	return 0;

fail_1:
	dev_dbg(&dbgp.gadget->dev, "ep config: failure (%d)\n", stp);
	return -ENODEV;
}

static int dbgp_bind(struct usb_gadget *gadget,
		struct usb_gadget_driver *driver)
{
	int err, stp;

	dbgp.gadget = gadget;

	dbgp.req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
	if (!dbgp.req) {
		err = -ENOMEM;
		stp = 1;
		goto fail;
	}

	dbgp.req->buf = kmalloc(DBGP_REQ_EP0_LEN, GFP_KERNEL);
	if (!dbgp.req->buf) {
		err = -ENOMEM;
		stp = 2;
		goto fail;
	}

	dbgp.req->length = DBGP_REQ_EP0_LEN;

#ifdef CONFIG_USB_G_DBGP_SERIAL
	dbgp.serial = kzalloc(sizeof(struct gserial), GFP_KERNEL);
	if (!dbgp.serial) {
		stp = 3;
		err = -ENOMEM;
		goto fail;
	}

	if (gserial_alloc_line(&tty_line)) {
		stp = 4;
		err = -ENODEV;
		goto fail;
	}
#endif

	err = dbgp_configure_endpoints(gadget);
	if (err < 0) {
		stp = 5;
		goto fail;
	}

	dev_dbg(&dbgp.gadget->dev, "bind: success\n");
	return 0;

fail:
	dev_dbg(&gadget->dev, "bind: failure (%d:%d)\n", stp, err);
	dbgp_unbind(gadget);
	return err;
}

static void dbgp_setup_complete(struct usb_ep *ep,
				struct usb_request *req)
{
	dev_dbg(&dbgp.gadget->dev, "setup complete: %d, %d/%d\n",
		req->status, req->actual, req->length);
}

static int dbgp_setup(struct usb_gadget *gadget,
		      const struct usb_ctrlrequest *ctrl)
{
	struct usb_request *req = dbgp.req;
	u8 request = ctrl->bRequest;
	u16 value = le16_to_cpu(ctrl->wValue);
	u16 length = le16_to_cpu(ctrl->wLength);
	int err = -EOPNOTSUPP;
	void *data = NULL;
	u16 len = 0;

	if (request == USB_REQ_GET_DESCRIPTOR) {
		switch (value>>8) {
		case USB_DT_DEVICE:
			dev_dbg(&dbgp.gadget->dev, "setup: desc device\n");
			len = sizeof device_desc;
			data = &device_desc;
			device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
			break;
		case USB_DT_DEBUG:
			dev_dbg(&dbgp.gadget->dev, "setup: desc debug\n");
			len = sizeof dbg_desc;
			data = &dbg_desc;
			break;
		default:
			goto fail;
		}
		err = 0;
	} else if (request == USB_REQ_SET_FEATURE &&
		   value == USB_DEVICE_DEBUG_MODE) {
		dev_dbg(&dbgp.gadget->dev, "setup: feat debug\n");
#ifdef CONFIG_USB_G_DBGP_PRINTK
		err = dbgp_enable_ep();
#else
		err = dbgp_configure_endpoints(gadget);
		if (err < 0) {
			goto fail;
		}
		err = gserial_connect(dbgp.serial, tty_line);
#endif
		if (err < 0)
			goto fail;
	} else
		goto fail;

	req->length = min(length, len);
	req->zero = len < req->length;
	if (data && req->length)
		memcpy(req->buf, data, req->length);

	req->complete = dbgp_setup_complete;
	return usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);

fail:
	dev_dbg(&dbgp.gadget->dev,
		"setup: failure req %x v %x\n", request, value);
	return err;
}

static struct usb_gadget_driver dbgp_driver = {
	.function = "dbgp",
	.max_speed = USB_SPEED_HIGH,
	.bind = dbgp_bind,
	.unbind = dbgp_unbind,
	.setup = dbgp_setup,
	.reset = dbgp_disconnect,
	.disconnect = dbgp_disconnect,
	.driver	= {
		.owner = THIS_MODULE,
		.name = "dbgp"
	},
};

static int __init dbgp_init(void)
{
	return usb_gadget_probe_driver(&dbgp_driver);
}

static void __exit dbgp_exit(void)
{
	usb_gadget_unregister_driver(&dbgp_driver);
#ifdef CONFIG_USB_G_DBGP_SERIAL
	gserial_free_line(tty_line);
#endif
}

MODULE_AUTHOR("Stephane Duverger");
MODULE_LICENSE("GPL");
module_init(dbgp_init);
module_exit(dbgp_exit);
Commit	Line	Data
f6c826a9	1	/*
	2	* dbgp.c -- EHCI Debug Port device gadget
	3	*
	4	* Copyright (C) 2010 Stephane Duverger
	5	*
	6	* Released under the GPLv2.
f6c826a9	7	*/
	8
	9	/* verbose messages */
	10	#include <linux/kernel.h>
	11	#include <linux/device.h>
6eb0de82	12	#include <linux/module.h>
f6c826a9	13	#include <linux/usb/ch9.h>
	14	#include <linux/usb/gadget.h>
	15
3249ca22	16	#include "u_serial.h"
f6c826a9	17
	18	#define DRIVER_VENDOR_ID 0x0525 /* NetChip */
	19	#define DRIVER_PRODUCT_ID 0xc0de /* undefined */
	20
	21	#define USB_DEBUG_MAX_PACKET_SIZE 8
	22	#define DBGP_REQ_EP0_LEN 128
	23	#define DBGP_REQ_LEN 512
	24
	25	static struct dbgp {
	26	struct usb_gadget *gadget;
	27	struct usb_request *req;
	28	struct usb_ep *i_ep;
	29	struct usb_ep *o_ep;
	30	#ifdef CONFIG_USB_G_DBGP_SERIAL
	31	struct gserial *serial;
	32	#endif
	33	} dbgp;
	34
	35	static struct usb_device_descriptor device_desc = {
	36	.bLength = sizeof device_desc,
	37	.bDescriptorType = USB_DT_DEVICE,
b8464bcf	38	.bcdUSB = cpu_to_le16(0x0200),
f6c826a9	39	.bDeviceClass = USB_CLASS_VENDOR_SPEC,
b8464bcf VT	40	.idVendor = cpu_to_le16(DRIVER_VENDOR_ID),
b8464bcf VT	41	.idProduct = cpu_to_le16(DRIVER_PRODUCT_ID),
f6c826a9	42	.bNumConfigurations = 1,
	43	};
	44
	45	static struct usb_debug_descriptor dbg_desc = {
	46	.bLength = sizeof dbg_desc,
	47	.bDescriptorType = USB_DT_DEBUG,
	48	};
	49
	50	static struct usb_endpoint_descriptor i_desc = {
	51	.bLength = USB_DT_ENDPOINT_SIZE,
	52	.bDescriptorType = USB_DT_ENDPOINT,
	53	.bmAttributes = USB_ENDPOINT_XFER_BULK,
	54	.bEndpointAddress = USB_DIR_IN,
	55	};
	56
	57	static struct usb_endpoint_descriptor o_desc = {
	58	.bLength = USB_DT_ENDPOINT_SIZE,
	59	.bDescriptorType = USB_DT_ENDPOINT,
	60	.bmAttributes = USB_ENDPOINT_XFER_BULK,
	61	.bEndpointAddress = USB_DIR_OUT,
	62	};
	63
	64	#ifdef CONFIG_USB_G_DBGP_PRINTK
	65	static int dbgp_consume(char *buf, unsigned len)
	66	{
	67	char c;
	68
	69	if (!len)
	70	return 0;
	71
	72	c = buf[len-1];
	73	if (c != 0)
	74	buf[len-1] = 0;
	75
	76	printk(KERN_NOTICE "%s%c", buf, c);
	77	return 0;
	78	}
	79
	80	static void __disable_ep(struct usb_ep *ep)
	81	{
4ce86bfa	82	usb_ep_disable(ep);
f6c826a9	83	}
	84
	85	static void dbgp_disable_ep(void)
	86	{
	87	__disable_ep(dbgp.i_ep);
	88	__disable_ep(dbgp.o_ep);
	89	}
	90
	91	static void dbgp_complete(struct usb_ep ep, struct usb_request req)
	92	{
	93	int stp;
	94	int err = 0;
	95	int status = req->status;
	96
	97	if (ep == dbgp.i_ep) {
	98	stp = 1;
	99	goto fail;
	100	}
	101
	102	if (status != 0) {
	103	stp = 2;
	104	goto release_req;
	105	}
	106
	107	dbgp_consume(req->buf, req->actual);
	108
	109	req->length = DBGP_REQ_LEN;
	110	err = usb_ep_queue(ep, req, GFP_ATOMIC);
	111	if (err < 0) {
	112	stp = 3;
	113	goto release_req;
	114	}
	115
	116	return;
	117
	118	release_req:
	119	kfree(req->buf);
	120	usb_ep_free_request(dbgp.o_ep, req);
	121	dbgp_disable_ep();
	122	fail:
	123	dev_dbg(&dbgp.gadget->dev,
	124	"complete: failure (%d:%d) ==> %d\n", stp, err, status);
	125	}
	126
	127	static int dbgp_enable_ep_req(struct usb_ep *ep)
	128	{
	129	int err, stp;
	130	struct usb_request *req;
	131
	132	req = usb_ep_alloc_request(ep, GFP_KERNEL);
	133	if (!req) {
	134	err = -ENOMEM;
	135	stp = 1;
	136	goto fail_1;
	137	}
	138
	139	req->buf = kmalloc(DBGP_REQ_LEN, GFP_KERNEL);
	140	if (!req->buf) {
	141	err = -ENOMEM;
	142	stp = 2;
	143	goto fail_2;
	144	}
	145
	146	req->complete = dbgp_complete;
147	req->length = DBGP_REQ_LEN;
148	err = usb_ep_queue(ep, req, GFP_ATOMIC);
149	if (err < 0) {
150	stp = 3;
151	goto fail_3;
152	}
153
154	return 0;
155
156	fail_3:
157	kfree(req->buf);
158	fail_2:
159	usb_ep_free_request(dbgp.o_ep, req);
160	fail_1:
161	dev_dbg(&dbgp.gadget->dev,
162	"enable ep req: failure (%d:%d)\n", stp, err);
163	return err;
164	}
165
166	static int __enable_ep(struct usb_ep ep, struct usb_endpoint_descriptor desc)
167	{
72c973dd TB	168	int err;
	169	ep->desc = desc;
	170	err = usb_ep_enable(ep);
f6c826a9	171	return err;
	172	}
	173
	174	static int dbgp_enable_ep(void)
	175	{
	176	int err, stp;
	177
	178	err = __enable_ep(dbgp.i_ep, &i_desc);
	179	if (err < 0) {
	180	stp = 1;
	181	goto fail_1;
	182	}
	183
	184	err = __enable_ep(dbgp.o_ep, &o_desc);
	185	if (err < 0) {
	186	stp = 2;
	187	goto fail_2;
	188	}
	189
	190	err = dbgp_enable_ep_req(dbgp.o_ep);
	191	if (err < 0) {
	192	stp = 3;
	193	goto fail_3;
	194	}
	195
	196	return 0;
	197
	198	fail_3:
	199	__disable_ep(dbgp.o_ep);
	200	fail_2:
	201	__disable_ep(dbgp.i_ep);
	202	fail_1:
	203	dev_dbg(&dbgp.gadget->dev, "enable ep: failure (%d:%d)\n", stp, err);
	204	return err;
	205	}
	206	#endif
	207
	208	static void dbgp_disconnect(struct usb_gadget *gadget)
	209	{
	210	#ifdef CONFIG_USB_G_DBGP_PRINTK
	211	dbgp_disable_ep();
	212	#else
	213	gserial_disconnect(dbgp.serial);
	214	#endif
	215	}
	216
	217	static void dbgp_unbind(struct usb_gadget *gadget)
	218	{
	219	#ifdef CONFIG_USB_G_DBGP_SERIAL
	220	kfree(dbgp.serial);
4958cf32	221	dbgp.serial = NULL;
f6c826a9	222	#endif
	223	if (dbgp.req) {
	224	kfree(dbgp.req->buf);
	225	usb_ep_free_request(gadget->ep0, dbgp.req);
4958cf32	226	dbgp.req = NULL;
f6c826a9	227	}
f6c826a9	228	}
f6c826a9	229
19b10a88 SAS	230	#ifdef CONFIG_USB_G_DBGP_SERIAL
	231	static unsigned char tty_line;
	232	#endif
	233
6876d58f	234	static int dbgp_configure_endpoints(struct usb_gadget *gadget)
f6c826a9	235	{
	236	int stp;
	237
	238	usb_ep_autoconfig_reset(gadget);
	239
	240	dbgp.i_ep = usb_ep_autoconfig(gadget, &i_desc);
	241	if (!dbgp.i_ep) {
	242	stp = 1;
	243	goto fail_1;
	244	}
	245
f6c826a9	246	i_desc.wMaxPacketSize =
b8464bcf	247	cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);
f6c826a9	248
	249	dbgp.o_ep = usb_ep_autoconfig(gadget, &o_desc);
	250	if (!dbgp.o_ep) {
f6c826a9	251	stp = 2;
4ce86bfa	252	goto fail_1;
f6c826a9	253	}
f6c826a9	254
f6c826a9	255	o_desc.wMaxPacketSize =
b8464bcf	256	cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);
f6c826a9	257
a8779ee9 SS	258	dbg_desc.bDebugInEndpoint = i_desc.bEndpointAddress;
a8779ee9 SS	259	dbg_desc.bDebugOutEndpoint = o_desc.bEndpointAddress;
f6c826a9	260
	261	#ifdef CONFIG_USB_G_DBGP_SERIAL
	262	dbgp.serial->in = dbgp.i_ep;
	263	dbgp.serial->out = dbgp.o_ep;
	264
72c973dd TB	265	dbgp.serial->in->desc = &i_desc;
72c973dd TB	266	dbgp.serial->out->desc = &o_desc;
6876d58f	267	#endif
f6c826a9	268
	269	return 0;
	270
f6c826a9	271	fail_1:
	272	dev_dbg(&dbgp.gadget->dev, "ep config: failure (%d)\n", stp);
	273	return -ENODEV;
	274	}
	275
c94e289f	276	static int dbgp_bind(struct usb_gadget *gadget,
ffe0b335	277	struct usb_gadget_driver *driver)
f6c826a9	278	{
	279	int err, stp;
	280
	281	dbgp.gadget = gadget;
	282
	283	dbgp.req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
	284	if (!dbgp.req) {
	285	err = -ENOMEM;
	286	stp = 1;
	287	goto fail;
	288	}
	289
	290	dbgp.req->buf = kmalloc(DBGP_REQ_EP0_LEN, GFP_KERNEL);
	291	if (!dbgp.req->buf) {
	292	err = -ENOMEM;
	293	stp = 2;
	294	goto fail;
	295	}
	296
	297	dbgp.req->length = DBGP_REQ_EP0_LEN;
f6c826a9	298
	299	#ifdef CONFIG_USB_G_DBGP_SERIAL
	300	dbgp.serial = kzalloc(sizeof(struct gserial), GFP_KERNEL);
	301	if (!dbgp.serial) {
	302	stp = 3;
	303	err = -ENOMEM;
	304	goto fail;
	305	}
6876d58f KM	306
	307	if (gserial_alloc_line(&tty_line)) {
	308	stp = 4;
	309	err = -ENODEV;
	310	goto fail;
	311	}
f6c826a9	312	#endif
6876d58f	313
f6c826a9	314	err = dbgp_configure_endpoints(gadget);
f6c826a9	315	if (err < 0) {
6876d58f	316	stp = 5;
f6c826a9	317	goto fail;
	318	}
	319
	320	dev_dbg(&dbgp.gadget->dev, "bind: success\n");
	321	return 0;
	322
	323	fail:
	324	dev_dbg(&gadget->dev, "bind: failure (%d:%d)\n", stp, err);
	325	dbgp_unbind(gadget);
	326	return err;
	327	}
	328
	329	static void dbgp_setup_complete(struct usb_ep *ep,
	330	struct usb_request *req)
	331	{
	332	dev_dbg(&dbgp.gadget->dev, "setup complete: %d, %d/%d\n",
	333	req->status, req->actual, req->length);
	334	}
	335
	336	static int dbgp_setup(struct usb_gadget *gadget,
	337	const struct usb_ctrlrequest *ctrl)
	338	{
	339	struct usb_request *req = dbgp.req;
	340	u8 request = ctrl->bRequest;
	341	u16 value = le16_to_cpu(ctrl->wValue);
	342	u16 length = le16_to_cpu(ctrl->wLength);
1744020c SS	343	int err = -EOPNOTSUPP;
	344	void *data = NULL;
	345	u16 len = 0;
f6c826a9	346
f6c826a9	347	if (request == USB_REQ_GET_DESCRIPTOR) {
	348	switch (value>>8) {
	349	case USB_DT_DEVICE:
	350	dev_dbg(&dbgp.gadget->dev, "setup: desc device\n");
	351	len = sizeof device_desc;
	352	data = &device_desc;
765f5b83	353	device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
f6c826a9	354	break;
	355	case USB_DT_DEBUG:
	356	dev_dbg(&dbgp.gadget->dev, "setup: desc debug\n");
	357	len = sizeof dbg_desc;
	358	data = &dbg_desc;
	359	break;
	360	default:
	361	goto fail;
	362	}
1744020c	363	err = 0;
f6c826a9	364	} else if (request == USB_REQ_SET_FEATURE &&
f6c826a9	365	value == USB_DEVICE_DEBUG_MODE) {
f6c826a9	366	dev_dbg(&dbgp.gadget->dev, "setup: feat debug\n");
	367	#ifdef CONFIG_USB_G_DBGP_PRINTK
	368	err = dbgp_enable_ep();
	369	#else
6876d58f KM	370	err = dbgp_configure_endpoints(gadget);
	371	if (err < 0) {
	372	goto fail;
	373	}
19b10a88	374	err = gserial_connect(dbgp.serial, tty_line);
f6c826a9	375	#endif
	376	if (err < 0)
	377	goto fail;
	378	} else
	379	goto fail;
	380
c6a76781 DC	381	req->length = min(length, len);
	382	req->zero = len < req->length;
	383	if (data && req->length)
	384	memcpy(req->buf, data, req->length);
	385
	386	req->complete = dbgp_setup_complete;
	387	return usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
f6c826a9	388
	389	fail:
	390	dev_dbg(&dbgp.gadget->dev,
	391	"setup: failure req %x v %x\n", request, value);
	392	return err;
	393	}
	394
c94e289f	395	static struct usb_gadget_driver dbgp_driver = {
f6c826a9	396	.function = "dbgp",
7177aed4	397	.max_speed = USB_SPEED_HIGH,
93952956	398	.bind = dbgp_bind,
f6c826a9	399	.unbind = dbgp_unbind,
f6c826a9	400	.setup = dbgp_setup,
e45cfa20	401	.reset = dbgp_disconnect,
f6c826a9	402	.disconnect = dbgp_disconnect,
	403	.driver = {
	404	.owner = THIS_MODULE,
	405	.name = "dbgp"
	406	},
	407	};
	408
	409	static int __init dbgp_init(void)
	410	{
93952956	411	return usb_gadget_probe_driver(&dbgp_driver);
f6c826a9	412	}
	413
	414	static void __exit dbgp_exit(void)
	415	{
	416	usb_gadget_unregister_driver(&dbgp_driver);
	417	#ifdef CONFIG_USB_G_DBGP_SERIAL
19b10a88	418	gserial_free_line(tty_line);
f6c826a9	419	#endif
	420	}
	421
	422	MODULE_AUTHOR("Stephane Duverger");
	423	MODULE_LICENSE("GPL");
	424	module_init(dbgp_init);
	425	module_exit(dbgp_exit);