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Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Remy Bohmerdf063442009-07-29 18:18:43 +02002/*
3 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
4 *
5 * Copyright (C) 2003-2005,2008 David Brownell
6 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
7 * Copyright (C) 2008 Nokia Corporation
Remy Bohmerdf063442009-07-29 18:18:43 +02008 */
9
10#include <common.h>
Simon Glassa73bda42015-11-08 23:47:45 -070011#include <console.h>
Simon Glass5e6201b2019-08-01 09:46:51 -060012#include <env.h>
Simon Glass0f2af882020-05-10 11:40:05 -060013#include <log.h>
Simon Glass655306c2020-05-10 11:39:58 -060014#include <part.h>
Masahiro Yamada56a931c2016-09-21 11:28:55 +090015#include <linux/errno.h>
Vitaly Kuzmichev24fcb472011-02-11 18:18:32 +030016#include <linux/netdevice.h>
Remy Bohmerdf063442009-07-29 18:18:43 +020017#include <linux/usb/ch9.h>
18#include <linux/usb/cdc.h>
19#include <linux/usb/gadget.h>
20#include <net.h>
Kishon Vijay Abraham I8db25202015-08-19 13:49:46 +053021#include <usb.h>
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +030022#include <malloc.h>
Simon Glass2dd337a2015-09-02 17:24:58 -060023#include <memalign.h>
Remy Bohmerdf063442009-07-29 18:18:43 +020024#include <linux/ctype.h>
25
26#include "gadget_chips.h"
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +030027#include "rndis.h"
Remy Bohmerdf063442009-07-29 18:18:43 +020028
Mugunthan V Nb3d902b2016-11-18 10:49:12 +053029#include <dm.h>
Mugunthan V N095b7612016-11-18 11:09:15 +053030#include <dm/lists.h>
Mugunthan V Nb3d902b2016-11-18 10:49:12 +053031#include <dm/uclass-internal.h>
32#include <dm/device-internal.h>
33
Vitaly Kuzmicheva36cff12010-12-28 16:59:31 +030034#define USB_NET_NAME "usb_ether"
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +040035
Remy Bohmerdf063442009-07-29 18:18:43 +020036extern struct platform_data brd;
Remy Bohmerdf063442009-07-29 18:18:43 +020037
38
39unsigned packet_received, packet_sent;
40
Remy Bohmerdf063442009-07-29 18:18:43 +020041/*
42 * Ethernet gadget driver -- with CDC and non-CDC options
43 * Builds on hardware support for a full duplex link.
44 *
45 * CDC Ethernet is the standard USB solution for sending Ethernet frames
46 * using USB. Real hardware tends to use the same framing protocol but look
47 * different for control features. This driver strongly prefers to use
48 * this USB-IF standard as its open-systems interoperability solution;
49 * most host side USB stacks (except from Microsoft) support it.
50 *
51 * This is sometimes called "CDC ECM" (Ethernet Control Model) to support
52 * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new
53 * "CDC EEM" (Ethernet Emulation Model) is starting to spread.
54 *
55 * There's some hardware that can't talk CDC ECM. We make that hardware
56 * implement a "minimalist" vendor-agnostic CDC core: same framing, but
57 * link-level setup only requires activating the configuration. Only the
58 * endpoint descriptors, and product/vendor IDs, are relevant; no control
59 * operations are available. Linux supports it, but other host operating
60 * systems may not. (This is a subset of CDC Ethernet.)
61 *
62 * It turns out that if you add a few descriptors to that "CDC Subset",
63 * (Windows) host side drivers from MCCI can treat it as one submode of
64 * a proprietary scheme called "SAFE" ... without needing to know about
65 * specific product/vendor IDs. So we do that, making it easier to use
66 * those MS-Windows drivers. Those added descriptors make it resemble a
67 * CDC MDLM device, but they don't change device behavior at all. (See
68 * MCCI Engineering report 950198 "SAFE Networking Functions".)
69 *
70 * A third option is also in use. Rather than CDC Ethernet, or something
71 * simpler, Microsoft pushes their own approach: RNDIS. The published
72 * RNDIS specs are ambiguous and appear to be incomplete, and are also
73 * needlessly complex. They borrow more from CDC ACM than CDC ECM.
74 */
Remy Bohmerdf063442009-07-29 18:18:43 +020075
76#define DRIVER_DESC "Ethernet Gadget"
77/* Based on linux 2.6.27 version */
78#define DRIVER_VERSION "May Day 2005"
79
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +040080static const char driver_desc[] = DRIVER_DESC;
Remy Bohmerdf063442009-07-29 18:18:43 +020081
82#define RX_EXTRA 20 /* guard against rx overflows */
83
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +030084#ifndef CONFIG_USB_ETH_RNDIS
85#define rndis_uninit(x) do {} while (0)
86#define rndis_deregister(c) do {} while (0)
87#define rndis_exit() do {} while (0)
88#endif
89
90/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
Remy Bohmerdf063442009-07-29 18:18:43 +020091#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
92 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
93 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
94 |USB_CDC_PACKET_TYPE_DIRECTED)
95
96#define USB_CONNECT_TIMEOUT (3 * CONFIG_SYS_HZ)
97
98/*-------------------------------------------------------------------------*/
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +030099
100struct eth_dev {
101 struct usb_gadget *gadget;
102 struct usb_request *req; /* for control responses */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300103 struct usb_request *stat_req; /* for cdc & rndis status */
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +0300104
105 u8 config;
106 struct usb_ep *in_ep, *out_ep, *status_ep;
107 const struct usb_endpoint_descriptor
108 *in, *out, *status;
109
110 struct usb_request *tx_req, *rx_req;
111
Mugunthan V N095b7612016-11-18 11:09:15 +0530112#ifndef CONFIG_DM_ETH
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +0300113 struct eth_device *net;
Mugunthan V N095b7612016-11-18 11:09:15 +0530114#else
115 struct udevice *net;
116#endif
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +0300117 struct net_device_stats stats;
118 unsigned int tx_qlen;
119
120 unsigned zlp:1;
121 unsigned cdc:1;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300122 unsigned rndis:1;
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +0300123 unsigned suspended:1;
124 unsigned network_started:1;
125 u16 cdc_filter;
126 unsigned long todo;
127 int mtu;
128#define WORK_RX_MEMORY 0
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300129 int rndis_config;
Vitaly Kuzmichev737f6b22011-02-11 18:18:33 +0300130 u8 host_mac[ETH_ALEN];
131};
132
133/*
134 * This version autoconfigures as much as possible at run-time.
135 *
136 * It also ASSUMES a self-powered device, without remote wakeup,
137 * although remote wakeup support would make sense.
138 */
139
140/*-------------------------------------------------------------------------*/
Mugunthan V N88e48be2016-11-18 11:06:13 +0530141struct ether_priv {
142 struct eth_dev ethdev;
Mugunthan V N095b7612016-11-18 11:09:15 +0530143#ifndef CONFIG_DM_ETH
Mugunthan V N88e48be2016-11-18 11:06:13 +0530144 struct eth_device netdev;
Mugunthan V N095b7612016-11-18 11:09:15 +0530145#else
146 struct udevice *netdev;
147#endif
Mugunthan V N88e48be2016-11-18 11:06:13 +0530148 struct usb_gadget_driver eth_driver;
149};
150
151struct ether_priv eth_priv;
152struct ether_priv *l_priv = &eth_priv;
Remy Bohmerdf063442009-07-29 18:18:43 +0200153
154/*-------------------------------------------------------------------------*/
155
156/* "main" config is either CDC, or its simple subset */
157static inline int is_cdc(struct eth_dev *dev)
158{
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200159#if !defined(CONFIG_USB_ETH_SUBSET)
Remy Bohmerdf063442009-07-29 18:18:43 +0200160 return 1; /* only cdc possible */
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200161#elif !defined(CONFIG_USB_ETH_CDC)
Remy Bohmerdf063442009-07-29 18:18:43 +0200162 return 0; /* only subset possible */
163#else
164 return dev->cdc; /* depends on what hardware we found */
165#endif
166}
167
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300168/* "secondary" RNDIS config may sometimes be activated */
169static inline int rndis_active(struct eth_dev *dev)
170{
171#ifdef CONFIG_USB_ETH_RNDIS
172 return dev->rndis;
173#else
174 return 0;
175#endif
176}
177
178#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
179#define cdc_active(dev) (is_cdc(dev) && !rndis_active(dev))
Remy Bohmerdf063442009-07-29 18:18:43 +0200180
181#define DEFAULT_QLEN 2 /* double buffering by default */
182
183/* peak bulk transfer bits-per-second */
184#define HS_BPS (13 * 512 * 8 * 1000 * 8)
185#define FS_BPS (19 * 64 * 1 * 1000 * 8)
186
187#ifdef CONFIG_USB_GADGET_DUALSPEED
188#define DEVSPEED USB_SPEED_HIGH
189
Vitaly Kuzmichevaec83b82010-08-12 16:44:40 +0400190#ifdef CONFIG_USB_ETH_QMULT
191#define qmult CONFIG_USB_ETH_QMULT
192#else
193#define qmult 5
194#endif
195
Remy Bohmerdf063442009-07-29 18:18:43 +0200196/* for dual-speed hardware, use deeper queues at highspeed */
197#define qlen(gadget) \
198 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
199
200static inline int BITRATE(struct usb_gadget *g)
201{
202 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
203}
204
205#else /* full speed (low speed doesn't do bulk) */
206
207#define qmult 1
208
209#define DEVSPEED USB_SPEED_FULL
210
211#define qlen(gadget) DEFAULT_QLEN
212
213static inline int BITRATE(struct usb_gadget *g)
214{
215 return FS_BPS;
216}
217#endif
218
Remy Bohmerdf063442009-07-29 18:18:43 +0200219/*-------------------------------------------------------------------------*/
220
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400221/*
222 * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
Remy Bohmerdf063442009-07-29 18:18:43 +0200223 * Instead: allocate your own, using normal USB-IF procedures.
224 */
225
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400226/*
227 * Thanks to NetChip Technologies for donating this product ID.
Remy Bohmerdf063442009-07-29 18:18:43 +0200228 * It's for devices with only CDC Ethernet configurations.
229 */
230#define CDC_VENDOR_NUM 0x0525 /* NetChip */
231#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
232
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400233/*
234 * For hardware that can't talk CDC, we use the same vendor ID that
Remy Bohmerdf063442009-07-29 18:18:43 +0200235 * ARM Linux has used for ethernet-over-usb, both with sa1100 and
236 * with pxa250. We're protocol-compatible, if the host-side drivers
237 * use the endpoint descriptors. bcdDevice (version) is nonzero, so
238 * drivers that need to hard-wire endpoint numbers have a hook.
239 *
240 * The protocol is a minimal subset of CDC Ether, which works on any bulk
241 * hardware that's not deeply broken ... even on hardware that can't talk
242 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
243 * doesn't handle control-OUT).
244 */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300245#define SIMPLE_VENDOR_NUM 0x049f /* Compaq Computer Corp. */
246#define SIMPLE_PRODUCT_NUM 0x505a /* Linux-USB "CDC Subset" Device */
Remy Bohmerdf063442009-07-29 18:18:43 +0200247
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400248/*
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300249 * For hardware that can talk RNDIS and either of the above protocols,
250 * use this ID ... the windows INF files will know it. Unless it's
251 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
252 * the non-RNDIS configuration.
253 */
254#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
255#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
256
257/*
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400258 * Some systems will want different product identifers published in the
Remy Bohmerdf063442009-07-29 18:18:43 +0200259 * device descriptor, either numbers or strings or both. These string
260 * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
261 */
262
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300263/*
264 * Emulating them in eth_bind:
265 * static ushort idVendor;
266 * static ushort idProduct;
267 */
268
Maxime Ripard48e78f82017-09-07 09:15:08 +0200269#if defined(CONFIG_USB_GADGET_MANUFACTURER)
270static char *iManufacturer = CONFIG_USB_GADGET_MANUFACTURER;
Remy Bohmerdf063442009-07-29 18:18:43 +0200271#else
Bin Meng75574052016-02-05 19:30:11 -0800272static char *iManufacturer = "U-Boot";
Remy Bohmerdf063442009-07-29 18:18:43 +0200273#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300274
275/* These probably need to be configurable. */
276static ushort bcdDevice;
Remy Bohmerdf063442009-07-29 18:18:43 +0200277static char *iProduct;
278static char *iSerialNumber;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300279
Remy Bohmerdf063442009-07-29 18:18:43 +0200280static char dev_addr[18];
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300281
Remy Bohmerdf063442009-07-29 18:18:43 +0200282static char host_addr[18];
283
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300284
Remy Bohmerdf063442009-07-29 18:18:43 +0200285/*-------------------------------------------------------------------------*/
286
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400287/*
288 * USB DRIVER HOOKUP (to the hardware driver, below us), mostly
Remy Bohmerdf063442009-07-29 18:18:43 +0200289 * ep0 implementation: descriptors, config management, setup().
290 * also optional class-specific notification interrupt transfer.
291 */
292
293/*
294 * DESCRIPTORS ... most are static, but strings and (full) configuration
295 * descriptors are built on demand. For now we do either full CDC, or
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300296 * our simple subset, with RNDIS as an optional second configuration.
297 *
298 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
299 * the class descriptors match a modem (they're ignored; it's really just
300 * Ethernet functionality), they don't need the NOP altsetting, and the
301 * status transfer endpoint isn't optional.
Remy Bohmerdf063442009-07-29 18:18:43 +0200302 */
303
304#define STRING_MANUFACTURER 1
305#define STRING_PRODUCT 2
306#define STRING_ETHADDR 3
307#define STRING_DATA 4
308#define STRING_CONTROL 5
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300309#define STRING_RNDIS_CONTROL 6
Remy Bohmerdf063442009-07-29 18:18:43 +0200310#define STRING_CDC 7
311#define STRING_SUBSET 8
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300312#define STRING_RNDIS 9
Remy Bohmerdf063442009-07-29 18:18:43 +0200313#define STRING_SERIALNUMBER 10
314
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300315/* holds our biggest descriptor (or RNDIS response) */
Remy Bohmerdf063442009-07-29 18:18:43 +0200316#define USB_BUFSIZ 256
317
318/*
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300319 * This device advertises one configuration, eth_config, unless RNDIS
320 * is enabled (rndis_config) on hardware supporting at least two configs.
321 *
322 * NOTE: Controllers like superh_udc should probably be able to use
323 * an RNDIS-only configuration.
Remy Bohmerdf063442009-07-29 18:18:43 +0200324 *
325 * FIXME define some higher-powered configurations to make it easier
326 * to recharge batteries ...
327 */
328
329#define DEV_CONFIG_VALUE 1 /* cdc or subset */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300330#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
Remy Bohmerdf063442009-07-29 18:18:43 +0200331
332static struct usb_device_descriptor
333device_desc = {
334 .bLength = sizeof device_desc,
335 .bDescriptorType = USB_DT_DEVICE,
336
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400337 .bcdUSB = __constant_cpu_to_le16(0x0200),
Remy Bohmerdf063442009-07-29 18:18:43 +0200338
339 .bDeviceClass = USB_CLASS_COMM,
340 .bDeviceSubClass = 0,
341 .bDeviceProtocol = 0,
342
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400343 .idVendor = __constant_cpu_to_le16(CDC_VENDOR_NUM),
344 .idProduct = __constant_cpu_to_le16(CDC_PRODUCT_NUM),
Remy Bohmerdf063442009-07-29 18:18:43 +0200345 .iManufacturer = STRING_MANUFACTURER,
346 .iProduct = STRING_PRODUCT,
347 .bNumConfigurations = 1,
348};
349
350static struct usb_otg_descriptor
351otg_descriptor = {
352 .bLength = sizeof otg_descriptor,
353 .bDescriptorType = USB_DT_OTG,
354
355 .bmAttributes = USB_OTG_SRP,
356};
357
358static struct usb_config_descriptor
359eth_config = {
360 .bLength = sizeof eth_config,
361 .bDescriptorType = USB_DT_CONFIG,
362
363 /* compute wTotalLength on the fly */
364 .bNumInterfaces = 2,
365 .bConfigurationValue = DEV_CONFIG_VALUE,
366 .iConfiguration = STRING_CDC,
367 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
368 .bMaxPower = 1,
369};
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300370
371#ifdef CONFIG_USB_ETH_RNDIS
372static struct usb_config_descriptor
373rndis_config = {
374 .bLength = sizeof rndis_config,
375 .bDescriptorType = USB_DT_CONFIG,
376
377 /* compute wTotalLength on the fly */
378 .bNumInterfaces = 2,
379 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
380 .iConfiguration = STRING_RNDIS,
381 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
382 .bMaxPower = 1,
383};
384#endif
Remy Bohmerdf063442009-07-29 18:18:43 +0200385
386/*
387 * Compared to the simple CDC subset, the full CDC Ethernet model adds
388 * three class descriptors, two interface descriptors, optional status
389 * endpoint. Both have a "data" interface and two bulk endpoints.
390 * There are also differences in how control requests are handled.
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300391 *
392 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of the
393 * CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it
394 * may hang or oops. Since bugfixes (or accurate specs, letting Linux
395 * work around those bugs) are unlikely to ever come from MSFT, you may
396 * wish to avoid using RNDIS.
397 *
398 * MCCI offers an alternative to RNDIS if you need to connect to Windows
399 * but have hardware that can't support CDC Ethernet. We add descriptors
400 * to present the CDC Subset as a (nonconformant) CDC MDLM variant called
401 * "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can
402 * get those drivers from MCCI, or bundled with various products.
Remy Bohmerdf063442009-07-29 18:18:43 +0200403 */
404
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200405#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200406static struct usb_interface_descriptor
407control_intf = {
408 .bLength = sizeof control_intf,
409 .bDescriptorType = USB_DT_INTERFACE,
410
411 .bInterfaceNumber = 0,
412 /* status endpoint is optional; this may be patched later */
413 .bNumEndpoints = 1,
414 .bInterfaceClass = USB_CLASS_COMM,
415 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
416 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
417 .iInterface = STRING_CONTROL,
418};
419#endif
420
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300421#ifdef CONFIG_USB_ETH_RNDIS
422static const struct usb_interface_descriptor
423rndis_control_intf = {
424 .bLength = sizeof rndis_control_intf,
425 .bDescriptorType = USB_DT_INTERFACE,
426
427 .bInterfaceNumber = 0,
428 .bNumEndpoints = 1,
429 .bInterfaceClass = USB_CLASS_COMM,
430 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
431 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
432 .iInterface = STRING_RNDIS_CONTROL,
433};
434#endif
435
Remy Bohmerdf063442009-07-29 18:18:43 +0200436static const struct usb_cdc_header_desc header_desc = {
437 .bLength = sizeof header_desc,
438 .bDescriptorType = USB_DT_CS_INTERFACE,
439 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
440
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400441 .bcdCDC = __constant_cpu_to_le16(0x0110),
Remy Bohmerdf063442009-07-29 18:18:43 +0200442};
443
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200444#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Remy Bohmerdf063442009-07-29 18:18:43 +0200445
446static const struct usb_cdc_union_desc union_desc = {
447 .bLength = sizeof union_desc,
448 .bDescriptorType = USB_DT_CS_INTERFACE,
449 .bDescriptorSubType = USB_CDC_UNION_TYPE,
450
451 .bMasterInterface0 = 0, /* index of control interface */
452 .bSlaveInterface0 = 1, /* index of DATA interface */
453};
454
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300455#endif /* CDC || RNDIS */
456
457#ifdef CONFIG_USB_ETH_RNDIS
458
459static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
460 .bLength = sizeof call_mgmt_descriptor,
461 .bDescriptorType = USB_DT_CS_INTERFACE,
462 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
463
464 .bmCapabilities = 0x00,
465 .bDataInterface = 0x01,
466};
467
468static const struct usb_cdc_acm_descriptor acm_descriptor = {
469 .bLength = sizeof acm_descriptor,
470 .bDescriptorType = USB_DT_CS_INTERFACE,
471 .bDescriptorSubType = USB_CDC_ACM_TYPE,
472
473 .bmCapabilities = 0x00,
474};
475
476#endif
Remy Bohmerdf063442009-07-29 18:18:43 +0200477
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200478#ifndef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200479
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400480/*
481 * "SAFE" loosely follows CDC WMC MDLM, violating the spec in various
Remy Bohmerdf063442009-07-29 18:18:43 +0200482 * ways: data endpoints live in the control interface, there's no data
483 * interface, and it's not used to talk to a cell phone radio.
484 */
485
486static const struct usb_cdc_mdlm_desc mdlm_desc = {
487 .bLength = sizeof mdlm_desc,
488 .bDescriptorType = USB_DT_CS_INTERFACE,
489 .bDescriptorSubType = USB_CDC_MDLM_TYPE,
490
491 .bcdVersion = __constant_cpu_to_le16(0x0100),
492 .bGUID = {
493 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
494 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
495 },
496};
497
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400498/*
499 * since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
Remy Bohmerdf063442009-07-29 18:18:43 +0200500 * can't really use its struct. All we do here is say that we're using
501 * the submode of "SAFE" which directly matches the CDC Subset.
502 */
Lokesh Vutlaae6b2df2017-01-17 08:51:22 +0530503#ifdef CONFIG_USB_ETH_SUBSET
Remy Bohmerdf063442009-07-29 18:18:43 +0200504static const u8 mdlm_detail_desc[] = {
505 6,
506 USB_DT_CS_INTERFACE,
507 USB_CDC_MDLM_DETAIL_TYPE,
508
509 0, /* "SAFE" */
510 0, /* network control capabilities (none) */
511 0, /* network data capabilities ("raw" encapsulation) */
512};
Lokesh Vutlaae6b2df2017-01-17 08:51:22 +0530513#endif
Remy Bohmerdf063442009-07-29 18:18:43 +0200514
515#endif
516
Remy Bohmerdf063442009-07-29 18:18:43 +0200517static const struct usb_cdc_ether_desc ether_desc = {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400518 .bLength = sizeof(ether_desc),
Remy Bohmerdf063442009-07-29 18:18:43 +0200519 .bDescriptorType = USB_DT_CS_INTERFACE,
520 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
521
522 /* this descriptor actually adds value, surprise! */
523 .iMACAddress = STRING_ETHADDR,
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400524 .bmEthernetStatistics = __constant_cpu_to_le32(0), /* no statistics */
Bin Meng2ccb8b02018-07-31 02:55:22 -0700525 .wMaxSegmentSize = __constant_cpu_to_le16(PKTSIZE_ALIGN),
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400526 .wNumberMCFilters = __constant_cpu_to_le16(0),
Remy Bohmerdf063442009-07-29 18:18:43 +0200527 .bNumberPowerFilters = 0,
528};
529
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200530#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Remy Bohmerdf063442009-07-29 18:18:43 +0200531
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400532/*
533 * include the status endpoint if we can, even where it's optional.
Remy Bohmerdf063442009-07-29 18:18:43 +0200534 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
535 * packet, to simplify cancellation; and a big transfer interval, to
536 * waste less bandwidth.
537 *
538 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
539 * if they ignore the connect/disconnect notifications that real aether
540 * can provide. more advanced cdc configurations might want to support
541 * encapsulated commands (vendor-specific, using control-OUT).
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300542 *
543 * RNDIS requires the status endpoint, since it uses that encapsulation
544 * mechanism for its funky RPC scheme.
Remy Bohmerdf063442009-07-29 18:18:43 +0200545 */
546
547#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
548#define STATUS_BYTECOUNT 16 /* 8 byte header + data */
549
550static struct usb_endpoint_descriptor
551fs_status_desc = {
552 .bLength = USB_DT_ENDPOINT_SIZE,
553 .bDescriptorType = USB_DT_ENDPOINT,
554
555 .bEndpointAddress = USB_DIR_IN,
556 .bmAttributes = USB_ENDPOINT_XFER_INT,
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400557 .wMaxPacketSize = __constant_cpu_to_le16(STATUS_BYTECOUNT),
Remy Bohmerdf063442009-07-29 18:18:43 +0200558 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
559};
560#endif
561
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200562#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200563
564/* the default data interface has no endpoints ... */
565
566static const struct usb_interface_descriptor
567data_nop_intf = {
568 .bLength = sizeof data_nop_intf,
569 .bDescriptorType = USB_DT_INTERFACE,
570
571 .bInterfaceNumber = 1,
572 .bAlternateSetting = 0,
573 .bNumEndpoints = 0,
574 .bInterfaceClass = USB_CLASS_CDC_DATA,
575 .bInterfaceSubClass = 0,
576 .bInterfaceProtocol = 0,
577};
578
579/* ... but the "real" data interface has two bulk endpoints */
580
581static const struct usb_interface_descriptor
582data_intf = {
583 .bLength = sizeof data_intf,
584 .bDescriptorType = USB_DT_INTERFACE,
585
586 .bInterfaceNumber = 1,
587 .bAlternateSetting = 1,
588 .bNumEndpoints = 2,
589 .bInterfaceClass = USB_CLASS_CDC_DATA,
590 .bInterfaceSubClass = 0,
591 .bInterfaceProtocol = 0,
592 .iInterface = STRING_DATA,
593};
594
595#endif
596
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300597#ifdef CONFIG_USB_ETH_RNDIS
598
599/* RNDIS doesn't activate by changing to the "real" altsetting */
600
601static const struct usb_interface_descriptor
602rndis_data_intf = {
603 .bLength = sizeof rndis_data_intf,
604 .bDescriptorType = USB_DT_INTERFACE,
605
606 .bInterfaceNumber = 1,
607 .bAlternateSetting = 0,
608 .bNumEndpoints = 2,
609 .bInterfaceClass = USB_CLASS_CDC_DATA,
610 .bInterfaceSubClass = 0,
611 .bInterfaceProtocol = 0,
612 .iInterface = STRING_DATA,
613};
614
615#endif
616
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200617#ifdef CONFIG_USB_ETH_SUBSET
Remy Bohmerdf063442009-07-29 18:18:43 +0200618
619/*
620 * "Simple" CDC-subset option is a simple vendor-neutral model that most
621 * full speed controllers can handle: one interface, two bulk endpoints.
622 *
623 * To assist host side drivers, we fancy it up a bit, and add descriptors
624 * so some host side drivers will understand it as a "SAFE" variant.
625 */
626
627static const struct usb_interface_descriptor
628subset_data_intf = {
629 .bLength = sizeof subset_data_intf,
630 .bDescriptorType = USB_DT_INTERFACE,
631
632 .bInterfaceNumber = 0,
633 .bAlternateSetting = 0,
634 .bNumEndpoints = 2,
635 .bInterfaceClass = USB_CLASS_COMM,
636 .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
637 .bInterfaceProtocol = 0,
638 .iInterface = STRING_DATA,
639};
640
641#endif /* SUBSET */
642
Remy Bohmerdf063442009-07-29 18:18:43 +0200643static struct usb_endpoint_descriptor
644fs_source_desc = {
645 .bLength = USB_DT_ENDPOINT_SIZE,
646 .bDescriptorType = USB_DT_ENDPOINT,
647
648 .bEndpointAddress = USB_DIR_IN,
649 .bmAttributes = USB_ENDPOINT_XFER_BULK,
Troy Kiskydbadc542013-09-25 18:41:04 -0700650 .wMaxPacketSize = __constant_cpu_to_le16(64),
Remy Bohmerdf063442009-07-29 18:18:43 +0200651};
652
653static struct usb_endpoint_descriptor
654fs_sink_desc = {
655 .bLength = USB_DT_ENDPOINT_SIZE,
656 .bDescriptorType = USB_DT_ENDPOINT,
657
658 .bEndpointAddress = USB_DIR_OUT,
659 .bmAttributes = USB_ENDPOINT_XFER_BULK,
Troy Kiskydbadc542013-09-25 18:41:04 -0700660 .wMaxPacketSize = __constant_cpu_to_le16(64),
Remy Bohmerdf063442009-07-29 18:18:43 +0200661};
662
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400663static const struct usb_descriptor_header *fs_eth_function[11] = {
Remy Bohmerdf063442009-07-29 18:18:43 +0200664 (struct usb_descriptor_header *) &otg_descriptor,
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200665#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200666 /* "cdc" mode descriptors */
667 (struct usb_descriptor_header *) &control_intf,
668 (struct usb_descriptor_header *) &header_desc,
669 (struct usb_descriptor_header *) &union_desc,
670 (struct usb_descriptor_header *) &ether_desc,
671 /* NOTE: status endpoint may need to be removed */
672 (struct usb_descriptor_header *) &fs_status_desc,
673 /* data interface, with altsetting */
674 (struct usb_descriptor_header *) &data_nop_intf,
675 (struct usb_descriptor_header *) &data_intf,
676 (struct usb_descriptor_header *) &fs_source_desc,
677 (struct usb_descriptor_header *) &fs_sink_desc,
678 NULL,
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200679#endif /* CONFIG_USB_ETH_CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +0200680};
681
682static inline void fs_subset_descriptors(void)
683{
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200684#ifdef CONFIG_USB_ETH_SUBSET
Remy Bohmerdf063442009-07-29 18:18:43 +0200685 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
686 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
687 fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
688 fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
689 fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
690 fs_eth_function[5] = (struct usb_descriptor_header *) &ether_desc;
691 fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc;
692 fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc;
693 fs_eth_function[8] = NULL;
694#else
695 fs_eth_function[1] = NULL;
696#endif
697}
698
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300699#ifdef CONFIG_USB_ETH_RNDIS
700static const struct usb_descriptor_header *fs_rndis_function[] = {
701 (struct usb_descriptor_header *) &otg_descriptor,
702 /* control interface matches ACM, not Ethernet */
703 (struct usb_descriptor_header *) &rndis_control_intf,
704 (struct usb_descriptor_header *) &header_desc,
705 (struct usb_descriptor_header *) &call_mgmt_descriptor,
706 (struct usb_descriptor_header *) &acm_descriptor,
707 (struct usb_descriptor_header *) &union_desc,
708 (struct usb_descriptor_header *) &fs_status_desc,
709 /* data interface has no altsetting */
710 (struct usb_descriptor_header *) &rndis_data_intf,
711 (struct usb_descriptor_header *) &fs_source_desc,
712 (struct usb_descriptor_header *) &fs_sink_desc,
713 NULL,
714};
715#endif
716
Remy Bohmerdf063442009-07-29 18:18:43 +0200717/*
718 * usb 2.0 devices need to expose both high speed and full speed
719 * descriptors, unless they only run at full speed.
720 */
721
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200722#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Remy Bohmerdf063442009-07-29 18:18:43 +0200723static struct usb_endpoint_descriptor
724hs_status_desc = {
725 .bLength = USB_DT_ENDPOINT_SIZE,
726 .bDescriptorType = USB_DT_ENDPOINT,
727
728 .bmAttributes = USB_ENDPOINT_XFER_INT,
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400729 .wMaxPacketSize = __constant_cpu_to_le16(STATUS_BYTECOUNT),
Remy Bohmerdf063442009-07-29 18:18:43 +0200730 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
731};
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200732#endif /* CONFIG_USB_ETH_CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +0200733
734static struct usb_endpoint_descriptor
735hs_source_desc = {
736 .bLength = USB_DT_ENDPOINT_SIZE,
737 .bDescriptorType = USB_DT_ENDPOINT,
738
739 .bmAttributes = USB_ENDPOINT_XFER_BULK,
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400740 .wMaxPacketSize = __constant_cpu_to_le16(512),
Remy Bohmerdf063442009-07-29 18:18:43 +0200741};
742
743static struct usb_endpoint_descriptor
744hs_sink_desc = {
745 .bLength = USB_DT_ENDPOINT_SIZE,
746 .bDescriptorType = USB_DT_ENDPOINT,
747
748 .bmAttributes = USB_ENDPOINT_XFER_BULK,
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400749 .wMaxPacketSize = __constant_cpu_to_le16(512),
Remy Bohmerdf063442009-07-29 18:18:43 +0200750};
751
752static struct usb_qualifier_descriptor
753dev_qualifier = {
754 .bLength = sizeof dev_qualifier,
755 .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
756
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400757 .bcdUSB = __constant_cpu_to_le16(0x0200),
Remy Bohmerdf063442009-07-29 18:18:43 +0200758 .bDeviceClass = USB_CLASS_COMM,
759
760 .bNumConfigurations = 1,
761};
762
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400763static const struct usb_descriptor_header *hs_eth_function[11] = {
Remy Bohmerdf063442009-07-29 18:18:43 +0200764 (struct usb_descriptor_header *) &otg_descriptor,
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200765#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200766 /* "cdc" mode descriptors */
767 (struct usb_descriptor_header *) &control_intf,
768 (struct usb_descriptor_header *) &header_desc,
769 (struct usb_descriptor_header *) &union_desc,
770 (struct usb_descriptor_header *) &ether_desc,
771 /* NOTE: status endpoint may need to be removed */
772 (struct usb_descriptor_header *) &hs_status_desc,
773 /* data interface, with altsetting */
774 (struct usb_descriptor_header *) &data_nop_intf,
775 (struct usb_descriptor_header *) &data_intf,
776 (struct usb_descriptor_header *) &hs_source_desc,
777 (struct usb_descriptor_header *) &hs_sink_desc,
778 NULL,
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200779#endif /* CONFIG_USB_ETH_CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +0200780};
781
782static inline void hs_subset_descriptors(void)
783{
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200784#ifdef CONFIG_USB_ETH_SUBSET
Remy Bohmerdf063442009-07-29 18:18:43 +0200785 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */
786 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
787 hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
788 hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
789 hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
790 hs_eth_function[5] = (struct usb_descriptor_header *) &ether_desc;
791 hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc;
792 hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc;
793 hs_eth_function[8] = NULL;
794#else
795 hs_eth_function[1] = NULL;
796#endif
797}
798
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300799#ifdef CONFIG_USB_ETH_RNDIS
800static const struct usb_descriptor_header *hs_rndis_function[] = {
801 (struct usb_descriptor_header *) &otg_descriptor,
802 /* control interface matches ACM, not Ethernet */
803 (struct usb_descriptor_header *) &rndis_control_intf,
804 (struct usb_descriptor_header *) &header_desc,
805 (struct usb_descriptor_header *) &call_mgmt_descriptor,
806 (struct usb_descriptor_header *) &acm_descriptor,
807 (struct usb_descriptor_header *) &union_desc,
808 (struct usb_descriptor_header *) &hs_status_desc,
809 /* data interface has no altsetting */
810 (struct usb_descriptor_header *) &rndis_data_intf,
811 (struct usb_descriptor_header *) &hs_source_desc,
812 (struct usb_descriptor_header *) &hs_sink_desc,
813 NULL,
814};
815#endif
816
817
Remy Bohmerdf063442009-07-29 18:18:43 +0200818/* maxpacket and other transfer characteristics vary by speed. */
819static inline struct usb_endpoint_descriptor *
820ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
821 struct usb_endpoint_descriptor *fs)
822{
823 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
824 return hs;
825 return fs;
826}
827
Remy Bohmerdf063442009-07-29 18:18:43 +0200828/*-------------------------------------------------------------------------*/
829
830/* descriptors that are built on-demand */
831
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400832static char manufacturer[50];
833static char product_desc[40] = DRIVER_DESC;
834static char serial_number[20];
Remy Bohmerdf063442009-07-29 18:18:43 +0200835
836/* address that the host will use ... usually assigned at random */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400837static char ethaddr[2 * ETH_ALEN + 1];
Remy Bohmerdf063442009-07-29 18:18:43 +0200838
839/* static strings, in UTF-8 */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400840static struct usb_string strings[] = {
Remy Bohmerdf063442009-07-29 18:18:43 +0200841 { STRING_MANUFACTURER, manufacturer, },
842 { STRING_PRODUCT, product_desc, },
843 { STRING_SERIALNUMBER, serial_number, },
844 { STRING_DATA, "Ethernet Data", },
845 { STRING_ETHADDR, ethaddr, },
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200846#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +0200847 { STRING_CDC, "CDC Ethernet", },
848 { STRING_CONTROL, "CDC Communications Control", },
849#endif
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200850#ifdef CONFIG_USB_ETH_SUBSET
Remy Bohmerdf063442009-07-29 18:18:43 +0200851 { STRING_SUBSET, "CDC Ethernet Subset", },
852#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300853#ifdef CONFIG_USB_ETH_RNDIS
854 { STRING_RNDIS, "RNDIS", },
855 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
856#endif
Remy Bohmerdf063442009-07-29 18:18:43 +0200857 { } /* end of list */
858};
859
860static struct usb_gadget_strings stringtab = {
861 .language = 0x0409, /* en-us */
862 .strings = strings,
863};
864
Remy Bohmerdf063442009-07-29 18:18:43 +0200865/*============================================================================*/
Joel Fernandes00b78392013-09-04 18:55:14 -0500866DEFINE_CACHE_ALIGN_BUFFER(u8, control_req, USB_BUFSIZ);
867
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200868#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Joel Fernandes00b78392013-09-04 18:55:14 -0500869DEFINE_CACHE_ALIGN_BUFFER(u8, status_req, STATUS_BYTECOUNT);
Lukasz Dalek6ca42dd2012-10-02 17:04:29 +0200870#endif
Remy Bohmerdf063442009-07-29 18:18:43 +0200871
Remy Bohmerdf063442009-07-29 18:18:43 +0200872/*============================================================================*/
873
874/*
875 * one config, two interfaces: control, data.
876 * complications: class descriptors, and an altsetting.
877 */
878static int
879config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg)
880{
881 int len;
882 const struct usb_config_descriptor *config;
883 const struct usb_descriptor_header **function;
884 int hs = 0;
885
886 if (gadget_is_dualspeed(g)) {
887 hs = (g->speed == USB_SPEED_HIGH);
888 if (type == USB_DT_OTHER_SPEED_CONFIG)
889 hs = !hs;
890 }
891#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
892
893 if (index >= device_desc.bNumConfigurations)
894 return -EINVAL;
895
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300896#ifdef CONFIG_USB_ETH_RNDIS
897 /*
898 * list the RNDIS config first, to make Microsoft's drivers
899 * happy. DOCSIS 1.0 needs this too.
900 */
901 if (device_desc.bNumConfigurations == 2 && index == 0) {
902 config = &rndis_config;
903 function = which_fn(rndis);
904 } else
905#endif
906 {
907 config = &eth_config;
908 function = which_fn(eth);
909 }
Remy Bohmerdf063442009-07-29 18:18:43 +0200910
911 /* for now, don't advertise srp-only devices */
912 if (!is_otg)
913 function++;
914
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400915 len = usb_gadget_config_buf(config, buf, USB_BUFSIZ, function);
Remy Bohmerdf063442009-07-29 18:18:43 +0200916 if (len < 0)
917 return len;
918 ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
919 return len;
920}
921
922/*-------------------------------------------------------------------------*/
923
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300924static void eth_start(struct eth_dev *dev, gfp_t gfp_flags);
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400925static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags);
Remy Bohmerdf063442009-07-29 18:18:43 +0200926
927static int
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400928set_ether_config(struct eth_dev *dev, gfp_t gfp_flags)
Remy Bohmerdf063442009-07-29 18:18:43 +0200929{
930 int result = 0;
931 struct usb_gadget *gadget = dev->gadget;
932
Lukasz Dalek284c4cf2012-10-02 17:04:31 +0200933#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300934 /* status endpoint used for RNDIS and (optionally) CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +0200935 if (!subset_active(dev) && dev->status_ep) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400936 dev->status = ep_desc(gadget, &hs_status_desc,
Remy Bohmerdf063442009-07-29 18:18:43 +0200937 &fs_status_desc);
938 dev->status_ep->driver_data = dev;
939
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400940 result = usb_ep_enable(dev->status_ep, dev->status);
Remy Bohmerdf063442009-07-29 18:18:43 +0200941 if (result != 0) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +0400942 debug("enable %s --> %d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +0200943 dev->status_ep->name, result);
944 goto done;
945 }
946 }
947#endif
948
949 dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc);
950 dev->in_ep->driver_data = dev;
951
952 dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc);
953 dev->out_ep->driver_data = dev;
954
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400955 /*
956 * With CDC, the host isn't allowed to use these two data
Remy Bohmerdf063442009-07-29 18:18:43 +0200957 * endpoints in the default altsetting for the interface.
958 * so we don't activate them yet. Reset from SET_INTERFACE.
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300959 *
960 * Strictly speaking RNDIS should work the same: activation is
961 * a side effect of setting a packet filter. Deactivation is
962 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
Remy Bohmerdf063442009-07-29 18:18:43 +0200963 */
964 if (!cdc_active(dev)) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400965 result = usb_ep_enable(dev->in_ep, dev->in);
Remy Bohmerdf063442009-07-29 18:18:43 +0200966 if (result != 0) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +0400967 debug("enable %s --> %d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +0200968 dev->in_ep->name, result);
969 goto done;
970 }
971
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400972 result = usb_ep_enable(dev->out_ep, dev->out);
Remy Bohmerdf063442009-07-29 18:18:43 +0200973 if (result != 0) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +0400974 debug("enable %s --> %d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +0200975 dev->out_ep->name, result);
976 goto done;
977 }
978 }
979
980done:
981 if (result == 0)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400982 result = alloc_requests(dev, qlen(gadget), gfp_flags);
Remy Bohmerdf063442009-07-29 18:18:43 +0200983
984 /* on error, disable any endpoints */
985 if (result < 0) {
Vitaly Kuzmichev750be4c2010-08-13 17:02:29 +0400986 if (!subset_active(dev) && dev->status_ep)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400987 (void) usb_ep_disable(dev->status_ep);
Remy Bohmerdf063442009-07-29 18:18:43 +0200988 dev->status = NULL;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +0400989 (void) usb_ep_disable(dev->in_ep);
990 (void) usb_ep_disable(dev->out_ep);
Remy Bohmerdf063442009-07-29 18:18:43 +0200991 dev->in = NULL;
992 dev->out = NULL;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +0300993 } else if (!cdc_active(dev)) {
994 /*
995 * activate non-CDC configs right away
996 * this isn't strictly according to the RNDIS spec
997 */
998 eth_start(dev, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +0200999 }
1000
1001 /* caller is responsible for cleanup on error */
1002 return result;
1003}
1004
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001005static void eth_reset_config(struct eth_dev *dev)
Remy Bohmerdf063442009-07-29 18:18:43 +02001006{
1007 if (dev->config == 0)
1008 return;
1009
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001010 debug("%s\n", __func__);
1011
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001012 rndis_uninit(dev->rndis_config);
1013
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001014 /*
1015 * disable endpoints, forcing (synchronous) completion of
Remy Bohmerdf063442009-07-29 18:18:43 +02001016 * pending i/o. then free the requests.
1017 */
1018
1019 if (dev->in) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001020 usb_ep_disable(dev->in_ep);
Remy Bohmerdf063442009-07-29 18:18:43 +02001021 if (dev->tx_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001022 usb_ep_free_request(dev->in_ep, dev->tx_req);
1023 dev->tx_req = NULL;
Remy Bohmerdf063442009-07-29 18:18:43 +02001024 }
1025 }
1026 if (dev->out) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001027 usb_ep_disable(dev->out_ep);
Remy Bohmerdf063442009-07-29 18:18:43 +02001028 if (dev->rx_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001029 usb_ep_free_request(dev->out_ep, dev->rx_req);
1030 dev->rx_req = NULL;
Remy Bohmerdf063442009-07-29 18:18:43 +02001031 }
1032 }
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001033 if (dev->status)
1034 usb_ep_disable(dev->status_ep);
1035
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001036 dev->rndis = 0;
Remy Bohmerdf063442009-07-29 18:18:43 +02001037 dev->cdc_filter = 0;
1038 dev->config = 0;
1039}
1040
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001041/*
1042 * change our operational config. must agree with the code
Remy Bohmerdf063442009-07-29 18:18:43 +02001043 * that returns config descriptors, and altsetting code.
1044 */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001045static int eth_set_config(struct eth_dev *dev, unsigned number,
1046 gfp_t gfp_flags)
Remy Bohmerdf063442009-07-29 18:18:43 +02001047{
1048 int result = 0;
1049 struct usb_gadget *gadget = dev->gadget;
1050
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001051 eth_reset_config(dev);
Remy Bohmerdf063442009-07-29 18:18:43 +02001052
1053 switch (number) {
1054 case DEV_CONFIG_VALUE:
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001055 result = set_ether_config(dev, gfp_flags);
Remy Bohmerdf063442009-07-29 18:18:43 +02001056 break;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001057#ifdef CONFIG_USB_ETH_RNDIS
1058 case DEV_RNDIS_CONFIG_VALUE:
1059 dev->rndis = 1;
1060 result = set_ether_config(dev, gfp_flags);
1061 break;
1062#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02001063 default:
1064 result = -EINVAL;
1065 /* FALL THROUGH */
1066 case 0:
1067 break;
1068 }
1069
1070 if (result) {
1071 if (number)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001072 eth_reset_config(dev);
Remy Bohmerdf063442009-07-29 18:18:43 +02001073 usb_gadget_vbus_draw(dev->gadget,
1074 gadget_is_otg(dev->gadget) ? 8 : 100);
1075 } else {
1076 char *speed;
1077 unsigned power;
1078
1079 power = 2 * eth_config.bMaxPower;
1080 usb_gadget_vbus_draw(dev->gadget, power);
1081
1082 switch (gadget->speed) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001083 case USB_SPEED_FULL:
1084 speed = "full"; break;
Remy Bohmerdf063442009-07-29 18:18:43 +02001085#ifdef CONFIG_USB_GADGET_DUALSPEED
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001086 case USB_SPEED_HIGH:
1087 speed = "high"; break;
Remy Bohmerdf063442009-07-29 18:18:43 +02001088#endif
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001089 default:
1090 speed = "?"; break;
Remy Bohmerdf063442009-07-29 18:18:43 +02001091 }
1092
1093 dev->config = number;
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001094 printf("%s speed config #%d: %d mA, %s, using %s\n",
Remy Bohmerdf063442009-07-29 18:18:43 +02001095 speed, number, power, driver_desc,
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001096 rndis_active(dev)
1097 ? "RNDIS"
1098 : (cdc_active(dev)
1099 ? "CDC Ethernet"
Remy Bohmerdf063442009-07-29 18:18:43 +02001100 : "CDC Ethernet Subset"));
1101 }
1102 return result;
1103}
1104
1105/*-------------------------------------------------------------------------*/
1106
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001107#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +02001108
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001109/*
1110 * The interrupt endpoint is used in CDC networking models (Ethernet, ATM)
Remy Bohmerdf063442009-07-29 18:18:43 +02001111 * only to notify the host about link status changes (which we support) or
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001112 * report completion of some encapsulated command (as used in RNDIS). Since
Remy Bohmerdf063442009-07-29 18:18:43 +02001113 * we want this CDC Ethernet code to be vendor-neutral, we don't use that
1114 * command mechanism; and only one status request is ever queued.
1115 */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001116static void eth_status_complete(struct usb_ep *ep, struct usb_request *req)
Remy Bohmerdf063442009-07-29 18:18:43 +02001117{
1118 struct usb_cdc_notification *event = req->buf;
1119 int value = req->status;
1120 struct eth_dev *dev = ep->driver_data;
1121
1122 /* issue the second notification if host reads the first */
1123 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
1124 && value == 0) {
1125 __le32 *data = req->buf + sizeof *event;
1126
1127 event->bmRequestType = 0xA1;
1128 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001129 event->wValue = __constant_cpu_to_le16(0);
1130 event->wIndex = __constant_cpu_to_le16(1);
1131 event->wLength = __constant_cpu_to_le16(8);
Remy Bohmerdf063442009-07-29 18:18:43 +02001132
1133 /* SPEED_CHANGE data is up/down speeds in bits/sec */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001134 data[0] = data[1] = cpu_to_le32(BITRATE(dev->gadget));
Remy Bohmerdf063442009-07-29 18:18:43 +02001135
1136 req->length = STATUS_BYTECOUNT;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001137 value = usb_ep_queue(ep, req, GFP_ATOMIC);
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001138 debug("send SPEED_CHANGE --> %d\n", value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001139 if (value == 0)
1140 return;
1141 } else if (value != -ECONNRESET) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001142 debug("event %02x --> %d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +02001143 event->bNotificationType, value);
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001144 if (event->bNotificationType ==
1145 USB_CDC_NOTIFY_SPEED_CHANGE) {
Mugunthan V N3963de32016-11-18 10:49:13 +05301146 dev->network_started = 1;
Remy Bohmerdf063442009-07-29 18:18:43 +02001147 printf("USB network up!\n");
1148 }
1149 }
1150 req->context = NULL;
1151}
1152
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001153static void issue_start_status(struct eth_dev *dev)
Remy Bohmerdf063442009-07-29 18:18:43 +02001154{
1155 struct usb_request *req = dev->stat_req;
1156 struct usb_cdc_notification *event;
1157 int value;
1158
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001159 /*
1160 * flush old status
Remy Bohmerdf063442009-07-29 18:18:43 +02001161 *
1162 * FIXME ugly idiom, maybe we'd be better with just
1163 * a "cancel the whole queue" primitive since any
1164 * unlink-one primitive has way too many error modes.
1165 * here, we "know" toggle is already clear...
1166 *
1167 * FIXME iff req->context != null just dequeue it
1168 */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001169 usb_ep_disable(dev->status_ep);
1170 usb_ep_enable(dev->status_ep, dev->status);
Remy Bohmerdf063442009-07-29 18:18:43 +02001171
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001172 /*
1173 * 3.8.1 says to issue first NETWORK_CONNECTION, then
Remy Bohmerdf063442009-07-29 18:18:43 +02001174 * a SPEED_CHANGE. could be useful in some configs.
1175 */
1176 event = req->buf;
1177 event->bmRequestType = 0xA1;
1178 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001179 event->wValue = __constant_cpu_to_le16(1); /* connected */
1180 event->wIndex = __constant_cpu_to_le16(1);
Remy Bohmerdf063442009-07-29 18:18:43 +02001181 event->wLength = 0;
1182
1183 req->length = sizeof *event;
1184 req->complete = eth_status_complete;
1185 req->context = dev;
1186
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001187 value = usb_ep_queue(dev->status_ep, req, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +02001188 if (value < 0)
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001189 debug("status buf queue --> %d\n", value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001190}
1191
1192#endif
1193
1194/*-------------------------------------------------------------------------*/
1195
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001196static void eth_setup_complete(struct usb_ep *ep, struct usb_request *req)
Remy Bohmerdf063442009-07-29 18:18:43 +02001197{
1198 if (req->status || req->actual != req->length)
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001199 debug("setup complete --> %d, %d/%d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +02001200 req->status, req->actual, req->length);
1201}
1202
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001203#ifdef CONFIG_USB_ETH_RNDIS
1204
1205static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
1206{
1207 if (req->status || req->actual != req->length)
1208 debug("rndis response complete --> %d, %d/%d\n",
1209 req->status, req->actual, req->length);
1210
1211 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
1212}
1213
1214static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
1215{
1216 struct eth_dev *dev = ep->driver_data;
1217 int status;
1218
1219 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
1220 status = rndis_msg_parser(dev->rndis_config, (u8 *) req->buf);
1221 if (status < 0)
Masahiro Yamada81e10422017-09-16 14:10:41 +09001222 pr_err("%s: rndis parse error %d", __func__, status);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001223}
1224
1225#endif /* RNDIS */
1226
Remy Bohmerdf063442009-07-29 18:18:43 +02001227/*
1228 * The setup() callback implements all the ep0 functionality that's not
1229 * handled lower down. CDC has a number of less-common features:
1230 *
1231 * - two interfaces: control, and ethernet data
1232 * - Ethernet data interface has two altsettings: default, and active
1233 * - class-specific descriptors for the control interface
1234 * - class-specific control requests
1235 */
1236static int
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001237eth_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
Remy Bohmerdf063442009-07-29 18:18:43 +02001238{
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001239 struct eth_dev *dev = get_gadget_data(gadget);
Remy Bohmerdf063442009-07-29 18:18:43 +02001240 struct usb_request *req = dev->req;
1241 int value = -EOPNOTSUPP;
1242 u16 wIndex = le16_to_cpu(ctrl->wIndex);
1243 u16 wValue = le16_to_cpu(ctrl->wValue);
1244 u16 wLength = le16_to_cpu(ctrl->wLength);
1245
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001246 /*
1247 * descriptors just go into the pre-allocated ep0 buffer,
Remy Bohmerdf063442009-07-29 18:18:43 +02001248 * while config change events may enable network traffic.
1249 */
1250
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001251 debug("%s\n", __func__);
Remy Bohmerdf063442009-07-29 18:18:43 +02001252
1253 req->complete = eth_setup_complete;
1254 switch (ctrl->bRequest) {
1255
1256 case USB_REQ_GET_DESCRIPTOR:
1257 if (ctrl->bRequestType != USB_DIR_IN)
1258 break;
1259 switch (wValue >> 8) {
1260
1261 case USB_DT_DEVICE:
Kishon Vijay Abraham I58d701e2015-02-23 18:40:17 +05301262 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001263 value = min(wLength, (u16) sizeof device_desc);
1264 memcpy(req->buf, &device_desc, value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001265 break;
1266 case USB_DT_DEVICE_QUALIFIER:
1267 if (!gadget_is_dualspeed(gadget))
1268 break;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001269 value = min(wLength, (u16) sizeof dev_qualifier);
1270 memcpy(req->buf, &dev_qualifier, value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001271 break;
1272
1273 case USB_DT_OTHER_SPEED_CONFIG:
1274 if (!gadget_is_dualspeed(gadget))
1275 break;
1276 /* FALLTHROUGH */
1277 case USB_DT_CONFIG:
1278 value = config_buf(gadget, req->buf,
1279 wValue >> 8,
1280 wValue & 0xff,
1281 gadget_is_otg(gadget));
1282 if (value >= 0)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001283 value = min(wLength, (u16) value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001284 break;
1285
1286 case USB_DT_STRING:
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001287 value = usb_gadget_get_string(&stringtab,
Remy Bohmerdf063442009-07-29 18:18:43 +02001288 wValue & 0xff, req->buf);
1289
1290 if (value >= 0)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001291 value = min(wLength, (u16) value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001292
1293 break;
1294 }
1295 break;
1296
1297 case USB_REQ_SET_CONFIGURATION:
1298 if (ctrl->bRequestType != 0)
1299 break;
1300 if (gadget->a_hnp_support)
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001301 debug("HNP available\n");
Remy Bohmerdf063442009-07-29 18:18:43 +02001302 else if (gadget->a_alt_hnp_support)
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001303 debug("HNP needs a different root port\n");
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001304 value = eth_set_config(dev, wValue, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +02001305 break;
1306 case USB_REQ_GET_CONFIGURATION:
1307 if (ctrl->bRequestType != USB_DIR_IN)
1308 break;
1309 *(u8 *)req->buf = dev->config;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001310 value = min(wLength, (u16) 1);
Remy Bohmerdf063442009-07-29 18:18:43 +02001311 break;
1312
1313 case USB_REQ_SET_INTERFACE:
1314 if (ctrl->bRequestType != USB_RECIP_INTERFACE
1315 || !dev->config
1316 || wIndex > 1)
1317 break;
1318 if (!cdc_active(dev) && wIndex != 0)
1319 break;
1320
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001321#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +02001322 switch (wIndex) {
1323 case 0: /* control/master intf */
1324 if (wValue != 0)
1325 break;
1326 if (dev->status) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001327 usb_ep_disable(dev->status_ep);
1328 usb_ep_enable(dev->status_ep, dev->status);
Remy Bohmerdf063442009-07-29 18:18:43 +02001329 }
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001330
Remy Bohmerdf063442009-07-29 18:18:43 +02001331 value = 0;
1332 break;
1333 case 1: /* data intf */
1334 if (wValue > 1)
1335 break;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001336 usb_ep_disable(dev->in_ep);
1337 usb_ep_disable(dev->out_ep);
Remy Bohmerdf063442009-07-29 18:18:43 +02001338
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001339 /*
1340 * CDC requires the data transfers not be done from
Remy Bohmerdf063442009-07-29 18:18:43 +02001341 * the default interface setting ... also, setting
1342 * the non-default interface resets filters etc.
1343 */
1344 if (wValue == 1) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001345 if (!cdc_active(dev))
Remy Bohmerdf063442009-07-29 18:18:43 +02001346 break;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001347 usb_ep_enable(dev->in_ep, dev->in);
1348 usb_ep_enable(dev->out_ep, dev->out);
Remy Bohmerdf063442009-07-29 18:18:43 +02001349 dev->cdc_filter = DEFAULT_FILTER;
1350 if (dev->status)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001351 issue_start_status(dev);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001352 eth_start(dev, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +02001353 }
Remy Bohmerdf063442009-07-29 18:18:43 +02001354 value = 0;
1355 break;
1356 }
1357#else
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001358 /*
1359 * FIXME this is wrong, as is the assumption that
Remy Bohmerdf063442009-07-29 18:18:43 +02001360 * all non-PXA hardware talks real CDC ...
1361 */
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001362 debug("set_interface ignored!\n");
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001363#endif /* CONFIG_USB_ETH_CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +02001364 break;
1365 case USB_REQ_GET_INTERFACE:
1366 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
1367 || !dev->config
1368 || wIndex > 1)
1369 break;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001370 if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0)
Remy Bohmerdf063442009-07-29 18:18:43 +02001371 break;
1372
1373 /* for CDC, iff carrier is on, data interface is active. */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001374 if (rndis_active(dev) || wIndex != 1)
Remy Bohmerdf063442009-07-29 18:18:43 +02001375 *(u8 *)req->buf = 0;
1376 else {
1377 /* *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; */
1378 /* carrier always ok ...*/
1379 *(u8 *)req->buf = 1 ;
1380 }
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001381 value = min(wLength, (u16) 1);
Remy Bohmerdf063442009-07-29 18:18:43 +02001382 break;
1383
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001384#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +02001385 case USB_CDC_SET_ETHERNET_PACKET_FILTER:
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001386 /*
1387 * see 6.2.30: no data, wIndex = interface,
Remy Bohmerdf063442009-07-29 18:18:43 +02001388 * wValue = packet filter bitmap
1389 */
1390 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1391 || !cdc_active(dev)
1392 || wLength != 0
1393 || wIndex > 1)
1394 break;
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001395 debug("packet filter %02x\n", wValue);
Remy Bohmerdf063442009-07-29 18:18:43 +02001396 dev->cdc_filter = wValue;
1397 value = 0;
1398 break;
1399
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001400 /*
1401 * and potentially:
Remy Bohmerdf063442009-07-29 18:18:43 +02001402 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
1403 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
1404 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
1405 * case USB_CDC_GET_ETHERNET_STATISTIC:
1406 */
1407
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001408#endif /* CONFIG_USB_ETH_CDC */
Remy Bohmerdf063442009-07-29 18:18:43 +02001409
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001410#ifdef CONFIG_USB_ETH_RNDIS
1411 /*
1412 * RNDIS uses the CDC command encapsulation mechanism to implement
1413 * an RPC scheme, with much getting/setting of attributes by OID.
1414 */
1415 case USB_CDC_SEND_ENCAPSULATED_COMMAND:
1416 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1417 || !rndis_active(dev)
1418 || wLength > USB_BUFSIZ
1419 || wValue
1420 || rndis_control_intf.bInterfaceNumber
1421 != wIndex)
1422 break;
1423 /* read the request, then process it */
1424 value = wLength;
1425 req->complete = rndis_command_complete;
1426 /* later, rndis_control_ack () sends a notification */
1427 break;
1428
1429 case USB_CDC_GET_ENCAPSULATED_RESPONSE:
1430 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1431 == ctrl->bRequestType
1432 && rndis_active(dev)
1433 /* && wLength >= 0x0400 */
1434 && !wValue
1435 && rndis_control_intf.bInterfaceNumber
1436 == wIndex) {
1437 u8 *buf;
1438 u32 n;
1439
1440 /* return the result */
1441 buf = rndis_get_next_response(dev->rndis_config, &n);
1442 if (buf) {
1443 memcpy(req->buf, buf, n);
1444 req->complete = rndis_response_complete;
1445 rndis_free_response(dev->rndis_config, buf);
1446 value = n;
1447 }
1448 /* else stalls ... spec says to avoid that */
1449 }
1450 break;
1451#endif /* RNDIS */
1452
Remy Bohmerdf063442009-07-29 18:18:43 +02001453 default:
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001454 debug("unknown control req%02x.%02x v%04x i%04x l%d\n",
Remy Bohmerdf063442009-07-29 18:18:43 +02001455 ctrl->bRequestType, ctrl->bRequest,
1456 wValue, wIndex, wLength);
1457 }
1458
1459 /* respond with data transfer before status phase? */
1460 if (value >= 0) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001461 debug("respond with data transfer before status phase\n");
Remy Bohmerdf063442009-07-29 18:18:43 +02001462 req->length = value;
1463 req->zero = value < wLength
1464 && (value % gadget->ep0->maxpacket) == 0;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001465 value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +02001466 if (value < 0) {
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001467 debug("ep_queue --> %d\n", value);
Remy Bohmerdf063442009-07-29 18:18:43 +02001468 req->status = 0;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001469 eth_setup_complete(gadget->ep0, req);
Remy Bohmerdf063442009-07-29 18:18:43 +02001470 }
1471 }
1472
1473 /* host either stalls (value < 0) or reports success */
1474 return value;
1475}
1476
Remy Bohmerdf063442009-07-29 18:18:43 +02001477/*-------------------------------------------------------------------------*/
1478
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001479static void rx_complete(struct usb_ep *ep, struct usb_request *req);
Remy Bohmerdf063442009-07-29 18:18:43 +02001480
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001481static int rx_submit(struct eth_dev *dev, struct usb_request *req,
Remy Bohmerdf063442009-07-29 18:18:43 +02001482 gfp_t gfp_flags)
1483{
1484 int retval = -ENOMEM;
1485 size_t size;
1486
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001487 /*
1488 * Padding up to RX_EXTRA handles minor disagreements with host.
Remy Bohmerdf063442009-07-29 18:18:43 +02001489 * Normally we use the USB "terminate on short read" convention;
1490 * so allow up to (N*maxpacket), since that memory is normally
1491 * already allocated. Some hardware doesn't deal well with short
1492 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
1493 * byte off the end (to force hardware errors on overflow).
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001494 *
1495 * RNDIS uses internal framing, and explicitly allows senders to
1496 * pad to end-of-packet. That's potentially nice for speed,
1497 * but means receivers can't recover synch on their own.
Remy Bohmerdf063442009-07-29 18:18:43 +02001498 */
1499
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001500 debug("%s\n", __func__);
Troy Kisky1d01de12013-09-25 18:41:05 -07001501 if (!req)
1502 return -EINVAL;
Remy Bohmerdf063442009-07-29 18:18:43 +02001503
1504 size = (ETHER_HDR_SIZE + dev->mtu + RX_EXTRA);
1505 size += dev->out_ep->maxpacket - 1;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001506 if (rndis_active(dev))
1507 size += sizeof(struct rndis_packet_msg_type);
Remy Bohmerdf063442009-07-29 18:18:43 +02001508 size -= size % dev->out_ep->maxpacket;
1509
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001510 /*
1511 * Some platforms perform better when IP packets are aligned,
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001512 * but on at least one, checksumming fails otherwise. Note:
1513 * RNDIS headers involve variable numbers of LE32 values.
Remy Bohmerdf063442009-07-29 18:18:43 +02001514 */
1515
Joe Hershberger9f09a362015-04-08 01:41:06 -05001516 req->buf = (u8 *)net_rx_packets[0];
Remy Bohmerdf063442009-07-29 18:18:43 +02001517 req->length = size;
1518 req->complete = rx_complete;
1519
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001520 retval = usb_ep_queue(dev->out_ep, req, gfp_flags);
Remy Bohmerdf063442009-07-29 18:18:43 +02001521
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001522 if (retval)
Masahiro Yamada81e10422017-09-16 14:10:41 +09001523 pr_err("rx submit --> %d", retval);
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001524
Remy Bohmerdf063442009-07-29 18:18:43 +02001525 return retval;
1526}
1527
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001528static void rx_complete(struct usb_ep *ep, struct usb_request *req)
Remy Bohmerdf063442009-07-29 18:18:43 +02001529{
1530 struct eth_dev *dev = ep->driver_data;
1531
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001532 debug("%s: status %d\n", __func__, req->status);
Vitaly Kuzmichev24fcb472011-02-11 18:18:32 +03001533 switch (req->status) {
1534 /* normal completion */
1535 case 0:
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001536 if (rndis_active(dev)) {
1537 /* we know MaxPacketsPerTransfer == 1 here */
1538 int length = rndis_rm_hdr(req->buf, req->actual);
1539 if (length < 0)
1540 goto length_err;
1541 req->length -= length;
1542 req->actual -= length;
1543 }
Bin Meng2ccb8b02018-07-31 02:55:22 -07001544 if (req->actual < ETH_HLEN || PKTSIZE_ALIGN < req->actual) {
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001545length_err:
1546 dev->stats.rx_errors++;
1547 dev->stats.rx_length_errors++;
1548 debug("rx length %d\n", req->length);
1549 break;
1550 }
1551
Vitaly Kuzmichev24fcb472011-02-11 18:18:32 +03001552 dev->stats.rx_packets++;
1553 dev->stats.rx_bytes += req->length;
1554 break;
1555
1556 /* software-driven interface shutdown */
1557 case -ECONNRESET: /* unlink */
1558 case -ESHUTDOWN: /* disconnect etc */
1559 /* for hardware automagic (such as pxa) */
1560 case -ECONNABORTED: /* endpoint reset */
1561 break;
1562
1563 /* data overrun */
1564 case -EOVERFLOW:
1565 dev->stats.rx_over_errors++;
1566 /* FALLTHROUGH */
1567 default:
1568 dev->stats.rx_errors++;
1569 break;
1570 }
Remy Bohmerdf063442009-07-29 18:18:43 +02001571
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001572 packet_received = 1;
Remy Bohmerdf063442009-07-29 18:18:43 +02001573}
1574
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001575static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
Remy Bohmerdf063442009-07-29 18:18:43 +02001576{
1577
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001578 dev->tx_req = usb_ep_alloc_request(dev->in_ep, 0);
Remy Bohmerdf063442009-07-29 18:18:43 +02001579
1580 if (!dev->tx_req)
Vitaly Kuzmichev2907b2c2010-09-22 13:13:55 +04001581 goto fail1;
Remy Bohmerdf063442009-07-29 18:18:43 +02001582
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001583 dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0);
Remy Bohmerdf063442009-07-29 18:18:43 +02001584
1585 if (!dev->rx_req)
Vitaly Kuzmichev2907b2c2010-09-22 13:13:55 +04001586 goto fail2;
Remy Bohmerdf063442009-07-29 18:18:43 +02001587
1588 return 0;
1589
Vitaly Kuzmichev2907b2c2010-09-22 13:13:55 +04001590fail2:
1591 usb_ep_free_request(dev->in_ep, dev->tx_req);
1592fail1:
Masahiro Yamada81e10422017-09-16 14:10:41 +09001593 pr_err("can't alloc requests");
Remy Bohmerdf063442009-07-29 18:18:43 +02001594 return -1;
1595}
1596
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001597static void tx_complete(struct usb_ep *ep, struct usb_request *req)
Remy Bohmerdf063442009-07-29 18:18:43 +02001598{
Vitaly Kuzmichev24fcb472011-02-11 18:18:32 +03001599 struct eth_dev *dev = ep->driver_data;
1600
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001601 debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok");
Vitaly Kuzmichev24fcb472011-02-11 18:18:32 +03001602 switch (req->status) {
1603 default:
1604 dev->stats.tx_errors++;
1605 debug("tx err %d\n", req->status);
1606 /* FALLTHROUGH */
1607 case -ECONNRESET: /* unlink */
1608 case -ESHUTDOWN: /* disconnect etc */
1609 break;
1610 case 0:
1611 dev->stats.tx_bytes += req->length;
1612 }
1613 dev->stats.tx_packets++;
1614
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001615 packet_sent = 1;
Remy Bohmerdf063442009-07-29 18:18:43 +02001616}
1617
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001618static inline int eth_is_promisc(struct eth_dev *dev)
Remy Bohmerdf063442009-07-29 18:18:43 +02001619{
1620 /* no filters for the CDC subset; always promisc */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001621 if (subset_active(dev))
Remy Bohmerdf063442009-07-29 18:18:43 +02001622 return 1;
1623 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
1624}
1625
1626#if 0
1627static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
1628{
1629 struct eth_dev *dev = netdev_priv(net);
1630 int length = skb->len;
1631 int retval;
1632 struct usb_request *req = NULL;
1633 unsigned long flags;
1634
1635 /* apply outgoing CDC or RNDIS filters */
1636 if (!eth_is_promisc (dev)) {
1637 u8 *dest = skb->data;
1638
Joe Hershberger8ecdbed2015-04-08 01:41:04 -05001639 if (is_multicast_ethaddr(dest)) {
Remy Bohmerdf063442009-07-29 18:18:43 +02001640 u16 type;
1641
1642 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
1643 * SET_ETHERNET_MULTICAST_FILTERS requests
1644 */
Joe Hershberger8ecdbed2015-04-08 01:41:04 -05001645 if (is_broadcast_ethaddr(dest))
Remy Bohmerdf063442009-07-29 18:18:43 +02001646 type = USB_CDC_PACKET_TYPE_BROADCAST;
1647 else
1648 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
1649 if (!(dev->cdc_filter & type)) {
1650 dev_kfree_skb_any (skb);
1651 return 0;
1652 }
1653 }
1654 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
1655 }
1656
1657 spin_lock_irqsave(&dev->req_lock, flags);
1658 /*
1659 * this freelist can be empty if an interrupt triggered disconnect()
1660 * and reconfigured the gadget (shutting down this queue) after the
1661 * network stack decided to xmit but before we got the spinlock.
1662 */
1663 if (list_empty(&dev->tx_reqs)) {
1664 spin_unlock_irqrestore(&dev->req_lock, flags);
1665 return 1;
1666 }
1667
1668 req = container_of (dev->tx_reqs.next, struct usb_request, list);
1669 list_del (&req->list);
1670
1671 /* temporarily stop TX queue when the freelist empties */
1672 if (list_empty (&dev->tx_reqs))
1673 netif_stop_queue (net);
1674 spin_unlock_irqrestore(&dev->req_lock, flags);
1675
1676 /* no buffer copies needed, unless the network stack did it
1677 * or the hardware can't use skb buffers.
1678 * or there's not enough space for any RNDIS headers we need
1679 */
1680 if (rndis_active(dev)) {
1681 struct sk_buff *skb_rndis;
1682
1683 skb_rndis = skb_realloc_headroom (skb,
1684 sizeof (struct rndis_packet_msg_type));
1685 if (!skb_rndis)
1686 goto drop;
1687
1688 dev_kfree_skb_any (skb);
1689 skb = skb_rndis;
1690 rndis_add_hdr (skb);
1691 length = skb->len;
1692 }
1693 req->buf = skb->data;
1694 req->context = skb;
1695 req->complete = tx_complete;
1696
1697 /* use zlp framing on tx for strict CDC-Ether conformance,
1698 * though any robust network rx path ignores extra padding.
1699 * and some hardware doesn't like to write zlps.
1700 */
1701 req->zero = 1;
1702 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
1703 length++;
1704
1705 req->length = length;
1706
1707 /* throttle highspeed IRQ rate back slightly */
1708 if (gadget_is_dualspeed(dev->gadget))
1709 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
1710 ? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
1711 : 0;
1712
1713 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
1714 switch (retval) {
1715 default:
1716 DEBUG (dev, "tx queue err %d\n", retval);
1717 break;
1718 case 0:
1719 net->trans_start = jiffies;
1720 atomic_inc (&dev->tx_qlen);
1721 }
1722
1723 if (retval) {
1724drop:
1725 dev->stats.tx_dropped++;
1726 dev_kfree_skb_any (skb);
1727 spin_lock_irqsave(&dev->req_lock, flags);
1728 if (list_empty (&dev->tx_reqs))
1729 netif_start_queue (net);
1730 list_add (&req->list, &dev->tx_reqs);
1731 spin_unlock_irqrestore(&dev->req_lock, flags);
1732 }
1733 return 0;
1734}
1735
1736/*-------------------------------------------------------------------------*/
1737#endif
1738
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001739static void eth_unbind(struct usb_gadget *gadget)
Remy Bohmerdf063442009-07-29 18:18:43 +02001740{
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001741 struct eth_dev *dev = get_gadget_data(gadget);
Remy Bohmerdf063442009-07-29 18:18:43 +02001742
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04001743 debug("%s...\n", __func__);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001744 rndis_deregister(dev->rndis_config);
1745 rndis_exit();
Remy Bohmerdf063442009-07-29 18:18:43 +02001746
Vitaly Kuzmichev90670702010-08-13 17:00:16 +04001747 /* we've already been disconnected ... no i/o is active */
1748 if (dev->req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001749 usb_ep_free_request(gadget->ep0, dev->req);
Vitaly Kuzmichev90670702010-08-13 17:00:16 +04001750 dev->req = NULL;
1751 }
Remy Bohmerdf063442009-07-29 18:18:43 +02001752 if (dev->stat_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001753 usb_ep_free_request(dev->status_ep, dev->stat_req);
Remy Bohmerdf063442009-07-29 18:18:43 +02001754 dev->stat_req = NULL;
1755 }
1756
1757 if (dev->tx_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001758 usb_ep_free_request(dev->in_ep, dev->tx_req);
1759 dev->tx_req = NULL;
Remy Bohmerdf063442009-07-29 18:18:43 +02001760 }
1761
1762 if (dev->rx_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001763 usb_ep_free_request(dev->out_ep, dev->rx_req);
1764 dev->rx_req = NULL;
Remy Bohmerdf063442009-07-29 18:18:43 +02001765 }
1766
1767/* unregister_netdev (dev->net);*/
1768/* free_netdev(dev->net);*/
1769
Lei Wen4af32732010-12-01 23:43:43 +08001770 dev->gadget = NULL;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001771 set_gadget_data(gadget, NULL);
Remy Bohmerdf063442009-07-29 18:18:43 +02001772}
1773
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001774static void eth_disconnect(struct usb_gadget *gadget)
Remy Bohmerdf063442009-07-29 18:18:43 +02001775{
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001776 eth_reset_config(get_gadget_data(gadget));
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001777 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
Remy Bohmerdf063442009-07-29 18:18:43 +02001778}
1779
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001780static void eth_suspend(struct usb_gadget *gadget)
Remy Bohmerdf063442009-07-29 18:18:43 +02001781{
1782 /* Not used */
1783}
1784
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001785static void eth_resume(struct usb_gadget *gadget)
Remy Bohmerdf063442009-07-29 18:18:43 +02001786{
1787 /* Not used */
1788}
1789
1790/*-------------------------------------------------------------------------*/
1791
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001792#ifdef CONFIG_USB_ETH_RNDIS
1793
1794/*
1795 * The interrupt endpoint is used in RNDIS to notify the host when messages
1796 * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT
1797 * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even
1798 * REMOTE_NDIS_KEEPALIVE_MSG.
1799 *
1800 * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and
1801 * normally just one notification will be queued.
1802 */
1803
1804static void rndis_control_ack_complete(struct usb_ep *ep,
1805 struct usb_request *req)
1806{
1807 struct eth_dev *dev = ep->driver_data;
1808
1809 debug("%s...\n", __func__);
1810 if (req->status || req->actual != req->length)
1811 debug("rndis control ack complete --> %d, %d/%d\n",
1812 req->status, req->actual, req->length);
1813
Mugunthan V N3963de32016-11-18 10:49:13 +05301814 if (!dev->network_started) {
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001815 if (rndis_get_state(dev->rndis_config)
1816 == RNDIS_DATA_INITIALIZED) {
Mugunthan V N3963de32016-11-18 10:49:13 +05301817 dev->network_started = 1;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001818 printf("USB RNDIS network up!\n");
1819 }
1820 }
1821
1822 req->context = NULL;
1823
1824 if (req != dev->stat_req)
1825 usb_ep_free_request(ep, req);
1826}
1827
1828static char rndis_resp_buf[8] __attribute__((aligned(sizeof(__le32))));
1829
Mugunthan V N095b7612016-11-18 11:09:15 +05301830#ifndef CONFIG_DM_ETH
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001831static int rndis_control_ack(struct eth_device *net)
Mugunthan V N095b7612016-11-18 11:09:15 +05301832#else
1833static int rndis_control_ack(struct udevice *net)
1834#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001835{
Simon Glass95588622020-12-22 19:30:28 -07001836 struct ether_priv *priv;
1837 struct eth_dev *dev;
1838 int length;
1839 struct usb_request *resp;
1840
1841#ifndef CONFIG_DM_ETH
1842 priv = (struct ether_priv *)net->priv;
1843#else
1844 priv = dev_get_priv(net);
1845#endif
1846 dev = &priv->ethdev;
1847 resp = dev->stat_req;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001848
1849 /* in case RNDIS calls this after disconnect */
1850 if (!dev->status) {
1851 debug("status ENODEV\n");
1852 return -ENODEV;
1853 }
1854
1855 /* in case queue length > 1 */
1856 if (resp->context) {
1857 resp = usb_ep_alloc_request(dev->status_ep, GFP_ATOMIC);
1858 if (!resp)
1859 return -ENOMEM;
1860 resp->buf = rndis_resp_buf;
1861 }
1862
1863 /*
1864 * Send RNDIS RESPONSE_AVAILABLE notification;
1865 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
1866 */
1867 resp->length = 8;
1868 resp->complete = rndis_control_ack_complete;
1869 resp->context = dev;
1870
1871 *((__le32 *) resp->buf) = __constant_cpu_to_le32(1);
1872 *((__le32 *) (resp->buf + 4)) = __constant_cpu_to_le32(0);
1873
1874 length = usb_ep_queue(dev->status_ep, resp, GFP_ATOMIC);
1875 if (length < 0) {
1876 resp->status = 0;
1877 rndis_control_ack_complete(dev->status_ep, resp);
1878 }
1879
1880 return 0;
1881}
1882
1883#else
1884
1885#define rndis_control_ack NULL
1886
1887#endif /* RNDIS */
1888
1889static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
1890{
1891 if (rndis_active(dev)) {
1892 rndis_set_param_medium(dev->rndis_config,
1893 NDIS_MEDIUM_802_3,
1894 BITRATE(dev->gadget)/100);
1895 rndis_signal_connect(dev->rndis_config);
1896 }
1897}
1898
1899static int eth_stop(struct eth_dev *dev)
1900{
Vitaly Kuzmichev3433c332011-02-11 18:18:35 +03001901#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
1902 unsigned long ts;
1903 unsigned long timeout = CONFIG_SYS_HZ; /* 1 sec to stop RNDIS */
1904#endif
1905
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001906 if (rndis_active(dev)) {
1907 rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
1908 rndis_signal_disconnect(dev->rndis_config);
1909
Vitaly Kuzmichev3433c332011-02-11 18:18:35 +03001910#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
1911 /* Wait until host receives OID_GEN_MEDIA_CONNECT_STATUS */
1912 ts = get_timer(0);
1913 while (get_timer(ts) < timeout)
Kishon Vijay Abraham I4763e162015-02-23 18:40:23 +05301914 usb_gadget_handle_interrupts(0);
Vitaly Kuzmichev3433c332011-02-11 18:18:35 +03001915#endif
1916
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001917 rndis_uninit(dev->rndis_config);
1918 dev->rndis = 0;
1919 }
1920
1921 return 0;
1922}
1923
1924/*-------------------------------------------------------------------------*/
1925
Remy Bohmerdf063442009-07-29 18:18:43 +02001926static int is_eth_addr_valid(char *str)
1927{
1928 if (strlen(str) == 17) {
1929 int i;
1930 char *p, *q;
1931 uchar ea[6];
1932
1933 /* see if it looks like an ethernet address */
1934
1935 p = str;
1936
1937 for (i = 0; i < 6; i++) {
1938 char term = (i == 5 ? '\0' : ':');
1939
1940 ea[i] = simple_strtol(p, &q, 16);
1941
1942 if ((q - p) != 2 || *q++ != term)
1943 break;
1944
1945 p = q;
1946 }
1947
Tom Riniadd21ca2012-10-31 13:30:41 +00001948 /* Now check the contents. */
Joe Hershberger8ecdbed2015-04-08 01:41:04 -05001949 return is_valid_ethaddr(ea);
Remy Bohmerdf063442009-07-29 18:18:43 +02001950 }
1951 return 0;
1952}
1953
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001954static u8 nibble(unsigned char c)
Remy Bohmerdf063442009-07-29 18:18:43 +02001955{
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001956 if (likely(isdigit(c)))
Remy Bohmerdf063442009-07-29 18:18:43 +02001957 return c - '0';
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001958 c = toupper(c);
1959 if (likely(isxdigit(c)))
Remy Bohmerdf063442009-07-29 18:18:43 +02001960 return 10 + c - 'A';
1961 return 0;
1962}
1963
1964static int get_ether_addr(const char *str, u8 *dev_addr)
1965{
1966 if (str) {
1967 unsigned i;
1968
1969 for (i = 0; i < 6; i++) {
1970 unsigned char num;
1971
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001972 if ((*str == '.') || (*str == ':'))
Remy Bohmerdf063442009-07-29 18:18:43 +02001973 str++;
1974 num = nibble(*str++) << 4;
1975 num |= (nibble(*str++));
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001976 dev_addr[i] = num;
Remy Bohmerdf063442009-07-29 18:18:43 +02001977 }
Joe Hershberger8ecdbed2015-04-08 01:41:04 -05001978 if (is_valid_ethaddr(dev_addr))
Remy Bohmerdf063442009-07-29 18:18:43 +02001979 return 0;
1980 }
1981 return 1;
1982}
1983
1984static int eth_bind(struct usb_gadget *gadget)
1985{
Mugunthan V N88e48be2016-11-18 11:06:13 +05301986 struct eth_dev *dev = &l_priv->ethdev;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001987 u8 cdc = 1, zlp = 1, rndis = 1;
Remy Bohmerdf063442009-07-29 18:18:43 +02001988 struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03001989 int status = -ENOMEM;
Remy Bohmerdf063442009-07-29 18:18:43 +02001990 int gcnum;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04001991 u8 tmp[7];
Mugunthan V N095b7612016-11-18 11:09:15 +05301992#ifdef CONFIG_DM_ETH
Simon Glassfa20e932020-12-03 16:55:20 -07001993 struct eth_pdata *pdata = dev_get_plat(l_priv->netdev);
Mugunthan V N095b7612016-11-18 11:09:15 +05301994#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02001995
1996 /* these flags are only ever cleared; compiler take note */
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02001997#ifndef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +02001998 cdc = 0;
1999#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002000#ifndef CONFIG_USB_ETH_RNDIS
2001 rndis = 0;
2002#endif
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002003 /*
2004 * Because most host side USB stacks handle CDC Ethernet, that
Remy Bohmerdf063442009-07-29 18:18:43 +02002005 * standard protocol is _strongly_ preferred for interop purposes.
2006 * (By everyone except Microsoft.)
2007 */
Tom Rini1e56de02022-06-25 11:02:42 -04002008 if (gadget_is_musbhdrc(gadget)) {
Remy Bohmerdf063442009-07-29 18:18:43 +02002009 /* reduce tx dma overhead by avoiding special cases */
2010 zlp = 0;
2011 } else if (gadget_is_sh(gadget)) {
2012 /* sh doesn't support multiple interfaces or configs */
2013 cdc = 0;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002014 rndis = 0;
Remy Bohmerdf063442009-07-29 18:18:43 +02002015 }
2016
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002017 gcnum = usb_gadget_controller_number(gadget);
Remy Bohmerdf063442009-07-29 18:18:43 +02002018 if (gcnum >= 0)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002019 device_desc.bcdDevice = cpu_to_le16(0x0300 + gcnum);
Remy Bohmerdf063442009-07-29 18:18:43 +02002020 else {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002021 /*
2022 * can't assume CDC works. don't want to default to
Remy Bohmerdf063442009-07-29 18:18:43 +02002023 * anything less functional on CDC-capable hardware,
2024 * so we fail in this case.
2025 */
Masahiro Yamada81e10422017-09-16 14:10:41 +09002026 pr_err("controller '%s' not recognized",
Remy Bohmerdf063442009-07-29 18:18:43 +02002027 gadget->name);
2028 return -ENODEV;
2029 }
2030
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002031 /*
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002032 * If there's an RNDIS configuration, that's what Windows wants to
2033 * be using ... so use these product IDs here and in the "linux.inf"
2034 * needed to install MSFT drivers. Current Linux kernels will use
2035 * the second configuration if it's CDC Ethernet, and need some help
2036 * to choose the right configuration otherwise.
Remy Bohmerdf063442009-07-29 18:18:43 +02002037 */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002038 if (rndis) {
Maxime Ripard48e78f82017-09-07 09:15:08 +02002039#if defined(CONFIG_USB_GADGET_VENDOR_NUM) && defined(CONFIG_USB_GADGET_PRODUCT_NUM)
Remy Bohmerdf063442009-07-29 18:18:43 +02002040 device_desc.idVendor =
Maxime Ripard48e78f82017-09-07 09:15:08 +02002041 __constant_cpu_to_le16(CONFIG_USB_GADGET_VENDOR_NUM);
Remy Bohmerdf063442009-07-29 18:18:43 +02002042 device_desc.idProduct =
Maxime Ripard48e78f82017-09-07 09:15:08 +02002043 __constant_cpu_to_le16(CONFIG_USB_GADGET_PRODUCT_NUM);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002044#else
2045 device_desc.idVendor =
2046 __constant_cpu_to_le16(RNDIS_VENDOR_NUM);
2047 device_desc.idProduct =
2048 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
2049#endif
2050 sprintf(product_desc, "RNDIS/%s", driver_desc);
Remy Bohmerdf063442009-07-29 18:18:43 +02002051
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002052 /*
2053 * CDC subset ... recognized by Linux since 2.4.10, but Windows
2054 * drivers aren't widely available. (That may be improved by
2055 * supporting one submode of the "SAFE" variant of MDLM.)
2056 */
2057 } else {
Maxime Ripard48e78f82017-09-07 09:15:08 +02002058#if defined(CONFIG_USB_GADGET_VENDOR_NUM) && defined(CONFIG_USB_GADGET_PRODUCT_NUM)
2059 device_desc.idVendor = cpu_to_le16(CONFIG_USB_GADGET_VENDOR_NUM);
2060 device_desc.idProduct = cpu_to_le16(CONFIG_USB_GADGET_PRODUCT_NUM);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002061#else
2062 if (!cdc) {
2063 device_desc.idVendor =
2064 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
2065 device_desc.idProduct =
2066 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
2067 }
Remy Bohmerdf063442009-07-29 18:18:43 +02002068#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002069 }
2070 /* support optional vendor/distro customization */
Remy Bohmerdf063442009-07-29 18:18:43 +02002071 if (bcdDevice)
2072 device_desc.bcdDevice = cpu_to_le16(bcdDevice);
2073 if (iManufacturer)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002074 strlcpy(manufacturer, iManufacturer, sizeof manufacturer);
Remy Bohmerdf063442009-07-29 18:18:43 +02002075 if (iProduct)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002076 strlcpy(product_desc, iProduct, sizeof product_desc);
Remy Bohmerdf063442009-07-29 18:18:43 +02002077 if (iSerialNumber) {
2078 device_desc.iSerialNumber = STRING_SERIALNUMBER,
Vitaly Kuzmichev214d7b02010-08-13 17:00:45 +04002079 strlcpy(serial_number, iSerialNumber, sizeof serial_number);
Remy Bohmerdf063442009-07-29 18:18:43 +02002080 }
2081
2082 /* all we really need is bulk IN/OUT */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002083 usb_ep_autoconfig_reset(gadget);
2084 in_ep = usb_ep_autoconfig(gadget, &fs_source_desc);
Remy Bohmerdf063442009-07-29 18:18:43 +02002085 if (!in_ep) {
2086autoconf_fail:
Masahiro Yamada81e10422017-09-16 14:10:41 +09002087 pr_err("can't autoconfigure on %s\n",
Remy Bohmerdf063442009-07-29 18:18:43 +02002088 gadget->name);
2089 return -ENODEV;
2090 }
2091 in_ep->driver_data = in_ep; /* claim */
2092
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002093 out_ep = usb_ep_autoconfig(gadget, &fs_sink_desc);
Remy Bohmerdf063442009-07-29 18:18:43 +02002094 if (!out_ep)
2095 goto autoconf_fail;
2096 out_ep->driver_data = out_ep; /* claim */
2097
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02002098#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002099 /*
2100 * CDC Ethernet control interface doesn't require a status endpoint.
Remy Bohmerdf063442009-07-29 18:18:43 +02002101 * Since some hosts expect one, try to allocate one anyway.
2102 */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002103 if (cdc || rndis) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002104 status_ep = usb_ep_autoconfig(gadget, &fs_status_desc);
Remy Bohmerdf063442009-07-29 18:18:43 +02002105 if (status_ep) {
2106 status_ep->driver_data = status_ep; /* claim */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002107 } else if (rndis) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002108 pr_err("can't run RNDIS on %s", gadget->name);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002109 return -ENODEV;
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02002110#ifdef CONFIG_USB_ETH_CDC
Remy Bohmerdf063442009-07-29 18:18:43 +02002111 } else if (cdc) {
2112 control_intf.bNumEndpoints = 0;
2113 /* FIXME remove endpoint from descriptor list */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002114#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02002115 }
2116 }
2117#endif
2118
2119 /* one config: cdc, else minimal subset */
2120 if (!cdc) {
2121 eth_config.bNumInterfaces = 1;
2122 eth_config.iConfiguration = STRING_SUBSET;
2123
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002124 /*
2125 * use functions to set these up, in case we're built to work
Remy Bohmerdf063442009-07-29 18:18:43 +02002126 * with multiple controllers and must override CDC Ethernet.
2127 */
2128 fs_subset_descriptors();
2129 hs_subset_descriptors();
2130 }
2131
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002132 usb_gadget_set_selfpowered(gadget);
Remy Bohmerdf063442009-07-29 18:18:43 +02002133
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002134 /* For now RNDIS is always a second config */
2135 if (rndis)
2136 device_desc.bNumConfigurations = 2;
2137
Remy Bohmerdf063442009-07-29 18:18:43 +02002138 if (gadget_is_dualspeed(gadget)) {
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002139 if (rndis)
2140 dev_qualifier.bNumConfigurations = 2;
2141 else if (!cdc)
Remy Bohmerdf063442009-07-29 18:18:43 +02002142 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2143
2144 /* assumes ep0 uses the same value for both speeds ... */
2145 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
2146
2147 /* and that all endpoints are dual-speed */
2148 hs_source_desc.bEndpointAddress =
2149 fs_source_desc.bEndpointAddress;
2150 hs_sink_desc.bEndpointAddress =
2151 fs_sink_desc.bEndpointAddress;
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02002152#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Remy Bohmerdf063442009-07-29 18:18:43 +02002153 if (status_ep)
2154 hs_status_desc.bEndpointAddress =
2155 fs_status_desc.bEndpointAddress;
2156#endif
2157 }
2158
2159 if (gadget_is_otg(gadget)) {
2160 otg_descriptor.bmAttributes |= USB_OTG_HNP,
2161 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2162 eth_config.bMaxPower = 4;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002163#ifdef CONFIG_USB_ETH_RNDIS
2164 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2165 rndis_config.bMaxPower = 4;
2166#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02002167 }
2168
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002169
2170 /* network device setup */
Mugunthan V N095b7612016-11-18 11:09:15 +05302171#ifndef CONFIG_DM_ETH
Mugunthan V N88e48be2016-11-18 11:06:13 +05302172 dev->net = &l_priv->netdev;
Mugunthan V N095b7612016-11-18 11:09:15 +05302173#else
2174 dev->net = l_priv->netdev;
2175#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02002176
2177 dev->cdc = cdc;
2178 dev->zlp = zlp;
2179
2180 dev->in_ep = in_ep;
2181 dev->out_ep = out_ep;
2182 dev->status_ep = status_ep;
2183
Mugunthan V N095b7612016-11-18 11:09:15 +05302184 memset(tmp, 0, sizeof(tmp));
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002185 /*
2186 * Module params for these addresses should come from ID proms.
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002187 * The host side address is used with CDC and RNDIS, and commonly
Remy Bohmerdf063442009-07-29 18:18:43 +02002188 * ends up in a persistent config database. It's not clear if
2189 * host side code for the SAFE thing cares -- its original BLAN
2190 * thing didn't, Sharp never assigned those addresses on Zaurii.
2191 */
Mugunthan V N095b7612016-11-18 11:09:15 +05302192#ifndef CONFIG_DM_ETH
Remy Bohmerdf063442009-07-29 18:18:43 +02002193 get_ether_addr(dev_addr, dev->net->enetaddr);
Remy Bohmerdf063442009-07-29 18:18:43 +02002194 memcpy(tmp, dev->net->enetaddr, sizeof(dev->net->enetaddr));
Mugunthan V N095b7612016-11-18 11:09:15 +05302195#else
2196 get_ether_addr(dev_addr, pdata->enetaddr);
2197 memcpy(tmp, pdata->enetaddr, sizeof(pdata->enetaddr));
2198#endif
Remy Bohmerdf063442009-07-29 18:18:43 +02002199
2200 get_ether_addr(host_addr, dev->host_mac);
2201
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002202 sprintf(ethaddr, "%02X%02X%02X%02X%02X%02X",
2203 dev->host_mac[0], dev->host_mac[1],
2204 dev->host_mac[2], dev->host_mac[3],
2205 dev->host_mac[4], dev->host_mac[5]);
Remy Bohmerdf063442009-07-29 18:18:43 +02002206
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002207 if (rndis) {
2208 status = rndis_init();
2209 if (status < 0) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002210 pr_err("can't init RNDIS, %d", status);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002211 goto fail;
2212 }
Remy Bohmerdf063442009-07-29 18:18:43 +02002213 }
2214
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002215 /*
2216 * use PKTSIZE (or aligned... from u-boot) and set
2217 * wMaxSegmentSize accordingly
2218 */
Remy Bohmerdf063442009-07-29 18:18:43 +02002219 dev->mtu = PKTSIZE_ALIGN; /* RNDIS does not like this, only 1514, TODO*/
2220
2221 /* preallocate control message data and buffer */
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002222 dev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
Remy Bohmerdf063442009-07-29 18:18:43 +02002223 if (!dev->req)
2224 goto fail;
2225 dev->req->buf = control_req;
2226 dev->req->complete = eth_setup_complete;
2227
2228 /* ... and maybe likewise for status transfer */
Lukasz Dalek284c4cf2012-10-02 17:04:31 +02002229#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
Remy Bohmerdf063442009-07-29 18:18:43 +02002230 if (dev->status_ep) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002231 dev->stat_req = usb_ep_alloc_request(dev->status_ep,
2232 GFP_KERNEL);
Remy Bohmerdf063442009-07-29 18:18:43 +02002233 if (!dev->stat_req) {
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002234 usb_ep_free_request(dev->status_ep, dev->req);
Remy Bohmerdf063442009-07-29 18:18:43 +02002235
2236 goto fail;
2237 }
Vitaly Kuzmichevef8d8d72010-08-13 17:01:06 +04002238 dev->stat_req->buf = status_req;
Remy Bohmerdf063442009-07-29 18:18:43 +02002239 dev->stat_req->context = NULL;
2240 }
2241#endif
2242
2243 /* finish hookup to lower layer ... */
2244 dev->gadget = gadget;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002245 set_gadget_data(gadget, dev);
Remy Bohmerdf063442009-07-29 18:18:43 +02002246 gadget->ep0->driver_data = dev;
2247
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002248 /*
2249 * two kinds of host-initiated state changes:
Remy Bohmerdf063442009-07-29 18:18:43 +02002250 * - iff DATA transfer is active, carrier is "on"
2251 * - tx queueing enabled if open *and* carrier is "on"
2252 */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002253
2254 printf("using %s, OUT %s IN %s%s%s\n", gadget->name,
2255 out_ep->name, in_ep->name,
2256 status_ep ? " STATUS " : "",
2257 status_ep ? status_ep->name : ""
2258 );
Mugunthan V N095b7612016-11-18 11:09:15 +05302259#ifndef CONFIG_DM_ETH
2260 printf("MAC %pM\n", dev->net->enetaddr);
2261#else
2262 printf("MAC %pM\n", pdata->enetaddr);
2263#endif
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002264
2265 if (cdc || rndis)
2266 printf("HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2267 dev->host_mac[0], dev->host_mac[1],
2268 dev->host_mac[2], dev->host_mac[3],
2269 dev->host_mac[4], dev->host_mac[5]);
2270
2271 if (rndis) {
2272 u32 vendorID = 0;
2273
2274 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
2275
2276 dev->rndis_config = rndis_register(rndis_control_ack);
2277 if (dev->rndis_config < 0) {
2278fail0:
2279 eth_unbind(gadget);
2280 debug("RNDIS setup failed\n");
2281 status = -ENODEV;
2282 goto fail;
2283 }
2284
2285 /* these set up a lot of the OIDs that RNDIS needs */
2286 rndis_set_host_mac(dev->rndis_config, dev->host_mac);
2287 if (rndis_set_param_dev(dev->rndis_config, dev->net, dev->mtu,
2288 &dev->stats, &dev->cdc_filter))
2289 goto fail0;
2290 if (rndis_set_param_vendor(dev->rndis_config, vendorID,
2291 manufacturer))
2292 goto fail0;
2293 if (rndis_set_param_medium(dev->rndis_config,
2294 NDIS_MEDIUM_802_3, 0))
2295 goto fail0;
2296 printf("RNDIS ready\n");
2297 }
Remy Bohmerdf063442009-07-29 18:18:43 +02002298 return 0;
2299
2300fail:
Masahiro Yamada81e10422017-09-16 14:10:41 +09002301 pr_err("%s failed, status = %d", __func__, status);
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002302 eth_unbind(gadget);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002303 return status;
Remy Bohmerdf063442009-07-29 18:18:43 +02002304}
2305
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002306/*-------------------------------------------------------------------------*/
Jean-Jacques Hiblot128151f2019-01-22 16:48:16 +01002307static void _usb_eth_halt(struct ether_priv *priv);
2308
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302309static int _usb_eth_init(struct ether_priv *priv)
Remy Bohmerdf063442009-07-29 18:18:43 +02002310{
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302311 struct eth_dev *dev = &priv->ethdev;
Remy Bohmerdf063442009-07-29 18:18:43 +02002312 struct usb_gadget *gadget;
2313 unsigned long ts;
Jean-Jacques Hiblot585e1992018-11-29 10:52:41 +01002314 int ret;
Remy Bohmerdf063442009-07-29 18:18:43 +02002315 unsigned long timeout = USB_CONNECT_TIMEOUT;
2316
Jean-Jacques Hiblot585e1992018-11-29 10:52:41 +01002317 ret = usb_gadget_initialize(0);
2318 if (ret)
2319 return ret;
Kishon Vijay Abraham I8db25202015-08-19 13:49:46 +05302320
Vitaly Kuzmichevbe0afbf2010-12-28 16:59:32 +03002321 /* Configure default mac-addresses for the USB ethernet device */
2322#ifdef CONFIG_USBNET_DEV_ADDR
2323 strlcpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr));
2324#endif
2325#ifdef CONFIG_USBNET_HOST_ADDR
2326 strlcpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr));
2327#endif
2328 /* Check if the user overruled the MAC addresses */
Simon Glass64b723f2017-08-03 12:22:12 -06002329 if (env_get("usbnet_devaddr"))
2330 strlcpy(dev_addr, env_get("usbnet_devaddr"),
Vitaly Kuzmichevbe0afbf2010-12-28 16:59:32 +03002331 sizeof(dev_addr));
2332
Simon Glass64b723f2017-08-03 12:22:12 -06002333 if (env_get("usbnet_hostaddr"))
2334 strlcpy(host_addr, env_get("usbnet_hostaddr"),
Vitaly Kuzmichevbe0afbf2010-12-28 16:59:32 +03002335 sizeof(host_addr));
2336
2337 if (!is_eth_addr_valid(dev_addr)) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002338 pr_err("Need valid 'usbnet_devaddr' to be set");
Vitaly Kuzmichevbe0afbf2010-12-28 16:59:32 +03002339 goto fail;
2340 }
2341 if (!is_eth_addr_valid(host_addr)) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002342 pr_err("Need valid 'usbnet_hostaddr' to be set");
Vitaly Kuzmichevbe0afbf2010-12-28 16:59:32 +03002343 goto fail;
2344 }
2345
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302346 priv->eth_driver.speed = DEVSPEED;
2347 priv->eth_driver.bind = eth_bind;
2348 priv->eth_driver.unbind = eth_unbind;
2349 priv->eth_driver.setup = eth_setup;
2350 priv->eth_driver.reset = eth_disconnect;
2351 priv->eth_driver.disconnect = eth_disconnect;
2352 priv->eth_driver.suspend = eth_suspend;
2353 priv->eth_driver.resume = eth_resume;
2354 if (usb_gadget_register_driver(&priv->eth_driver) < 0)
Lei Wen4af32732010-12-01 23:43:43 +08002355 goto fail;
Remy Bohmerdf063442009-07-29 18:18:43 +02002356
2357 dev->network_started = 0;
Remy Bohmerdf063442009-07-29 18:18:43 +02002358
2359 packet_received = 0;
2360 packet_sent = 0;
2361
2362 gadget = dev->gadget;
2363 usb_gadget_connect(gadget);
2364
Simon Glass64b723f2017-08-03 12:22:12 -06002365 if (env_get("cdc_connect_timeout"))
Simon Glassff9b9032021-07-24 09:03:30 -06002366 timeout = dectoul(env_get("cdc_connect_timeout"), NULL) * CONFIG_SYS_HZ;
Remy Bohmerdf063442009-07-29 18:18:43 +02002367 ts = get_timer(0);
Mugunthan V N3963de32016-11-18 10:49:13 +05302368 while (!dev->network_started) {
Remy Bohmerdf063442009-07-29 18:18:43 +02002369 /* Handle control-c and timeouts */
2370 if (ctrlc() || (get_timer(ts) > timeout)) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002371 pr_err("The remote end did not respond in time.");
Remy Bohmerdf063442009-07-29 18:18:43 +02002372 goto fail;
2373 }
Kishon Vijay Abraham I4763e162015-02-23 18:40:23 +05302374 usb_gadget_handle_interrupts(0);
Remy Bohmerdf063442009-07-29 18:18:43 +02002375 }
2376
Vitaly Kuzmicheve4bd3862010-09-22 13:13:56 +04002377 packet_received = 0;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002378 rx_submit(dev, dev->rx_req, 0);
Remy Bohmerdf063442009-07-29 18:18:43 +02002379 return 0;
2380fail:
Jean-Jacques Hiblot128151f2019-01-22 16:48:16 +01002381 _usb_eth_halt(priv);
Remy Bohmerdf063442009-07-29 18:18:43 +02002382 return -1;
2383}
2384
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302385static int _usb_eth_send(struct ether_priv *priv, void *packet, int length)
Remy Bohmerdf063442009-07-29 18:18:43 +02002386{
2387 int retval;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002388 void *rndis_pkt = NULL;
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302389 struct eth_dev *dev = &priv->ethdev;
Vitaly Kuzmichev2907b2c2010-09-22 13:13:55 +04002390 struct usb_request *req = dev->tx_req;
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002391 unsigned long ts;
2392 unsigned long timeout = USB_CONNECT_TIMEOUT;
Remy Bohmerdf063442009-07-29 18:18:43 +02002393
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04002394 debug("%s:...\n", __func__);
Remy Bohmerdf063442009-07-29 18:18:43 +02002395
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002396 /* new buffer is needed to include RNDIS header */
2397 if (rndis_active(dev)) {
2398 rndis_pkt = malloc(length +
2399 sizeof(struct rndis_packet_msg_type));
2400 if (!rndis_pkt) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002401 pr_err("No memory to alloc RNDIS packet");
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002402 goto drop;
2403 }
2404 rndis_add_hdr(rndis_pkt, length);
2405 memcpy(rndis_pkt + sizeof(struct rndis_packet_msg_type),
Joe Hershbergere4e04882012-05-22 18:36:19 +00002406 packet, length);
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002407 packet = rndis_pkt;
2408 length += sizeof(struct rndis_packet_msg_type);
2409 }
Joe Hershbergere4e04882012-05-22 18:36:19 +00002410 req->buf = packet;
Remy Bohmerdf063442009-07-29 18:18:43 +02002411 req->context = NULL;
2412 req->complete = tx_complete;
2413
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002414 /*
2415 * use zlp framing on tx for strict CDC-Ether conformance,
Remy Bohmerdf063442009-07-29 18:18:43 +02002416 * though any robust network rx path ignores extra padding.
2417 * and some hardware doesn't like to write zlps.
2418 */
2419 req->zero = 1;
2420 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
2421 length++;
2422
2423 req->length = length;
2424#if 0
2425 /* throttle highspeed IRQ rate back slightly */
2426 if (gadget_is_dualspeed(dev->gadget))
2427 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
2428 ? ((dev->tx_qlen % qmult) != 0) : 0;
2429#endif
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002430 dev->tx_qlen = 1;
2431 ts = get_timer(0);
2432 packet_sent = 0;
Remy Bohmerdf063442009-07-29 18:18:43 +02002433
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002434 retval = usb_ep_queue(dev->in_ep, req, GFP_ATOMIC);
Remy Bohmerdf063442009-07-29 18:18:43 +02002435
2436 if (!retval)
Vitaly Kuzmichevae5f9322010-08-13 16:57:51 +04002437 debug("%s: packet queued\n", __func__);
Vitaly Kuzmichev49ed8052010-09-13 18:37:11 +04002438 while (!packet_sent) {
2439 if (get_timer(ts) > timeout) {
2440 printf("timeout sending packets to usb ethernet\n");
2441 return -1;
2442 }
Kishon Vijay Abraham I4763e162015-02-23 18:40:23 +05302443 usb_gadget_handle_interrupts(0);
Remy Bohmerdf063442009-07-29 18:18:43 +02002444 }
Heinrich Schuchardt637ad632020-04-19 12:11:12 +02002445 free(rndis_pkt);
Remy Bohmerdf063442009-07-29 18:18:43 +02002446
2447 return 0;
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002448drop:
2449 dev->stats.tx_dropped++;
2450 return -ENOMEM;
Remy Bohmerdf063442009-07-29 18:18:43 +02002451}
2452
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302453static int _usb_eth_recv(struct ether_priv *priv)
Remy Bohmerdf063442009-07-29 18:18:43 +02002454{
Kishon Vijay Abraham I4763e162015-02-23 18:40:23 +05302455 usb_gadget_handle_interrupts(0);
Remy Bohmerdf063442009-07-29 18:18:43 +02002456
Remy Bohmerdf063442009-07-29 18:18:43 +02002457 return 0;
2458}
2459
Jean-Jacques Hiblot128151f2019-01-22 16:48:16 +01002460static void _usb_eth_halt(struct ether_priv *priv)
Remy Bohmerdf063442009-07-29 18:18:43 +02002461{
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302462 struct eth_dev *dev = &priv->ethdev;
Remy Bohmerdf063442009-07-29 18:18:43 +02002463
Lei Wen4af32732010-12-01 23:43:43 +08002464 /* If the gadget not registered, simple return */
2465 if (!dev->gadget)
2466 return;
2467
Vitaly Kuzmichev3433c332011-02-11 18:18:35 +03002468 /*
2469 * Some USB controllers may need additional deinitialization here
2470 * before dropping pull-up (also due to hardware issues).
2471 * For example: unhandled interrupt with status stage started may
2472 * bring the controller to fully broken state (until board reset).
2473 * There are some variants to debug and fix such cases:
2474 * 1) In the case of RNDIS connection eth_stop can perform additional
2475 * interrupt handling. See RNDIS_COMPLETE_SIGNAL_DISCONNECT definition.
2476 * 2) 'pullup' callback in your UDC driver can be improved to perform
2477 * this deinitialization.
2478 */
Vitaly Kuzmichev216c4472011-02-11 18:18:34 +03002479 eth_stop(dev);
2480
Remy Bohmerdf063442009-07-29 18:18:43 +02002481 usb_gadget_disconnect(dev->gadget);
Vitaly Kuzmichev08d4dd72011-02-11 18:18:31 +03002482
2483 /* Clear pending interrupt */
2484 if (dev->network_started) {
Kishon Vijay Abraham I4763e162015-02-23 18:40:23 +05302485 usb_gadget_handle_interrupts(0);
Vitaly Kuzmichev08d4dd72011-02-11 18:18:31 +03002486 dev->network_started = 0;
2487 }
2488
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302489 usb_gadget_unregister_driver(&priv->eth_driver);
Jean-Jacques Hiblot585e1992018-11-29 10:52:41 +01002490 usb_gadget_release(0);
Remy Bohmerdf063442009-07-29 18:18:43 +02002491}
2492
Mugunthan V N095b7612016-11-18 11:09:15 +05302493#ifndef CONFIG_DM_ETH
Masahiro Yamadaf7ed78b2020-06-26 15:13:33 +09002494static int usb_eth_init(struct eth_device *netdev, struct bd_info *bd)
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302495{
2496 struct ether_priv *priv = (struct ether_priv *)netdev->priv;
2497
2498 return _usb_eth_init(priv);
2499}
2500
2501static int usb_eth_send(struct eth_device *netdev, void *packet, int length)
2502{
2503 struct ether_priv *priv = (struct ether_priv *)netdev->priv;
2504
2505 return _usb_eth_send(priv, packet, length);
2506}
2507
2508static int usb_eth_recv(struct eth_device *netdev)
2509{
2510 struct ether_priv *priv = (struct ether_priv *)netdev->priv;
2511 struct eth_dev *dev = &priv->ethdev;
2512 int ret;
2513
2514 ret = _usb_eth_recv(priv);
2515 if (ret) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002516 pr_err("error packet receive\n");
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302517 return ret;
2518 }
2519
2520 if (!packet_received)
2521 return 0;
2522
2523 if (dev->rx_req) {
2524 net_process_received_packet(net_rx_packets[0],
2525 dev->rx_req->length);
2526 } else {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002527 pr_err("dev->rx_req invalid");
Mugunthan V Ndb5eb2a2016-11-18 11:08:27 +05302528 }
2529 packet_received = 0;
2530 rx_submit(dev, dev->rx_req, 0);
2531
2532 return 0;
2533}
2534
2535void usb_eth_halt(struct eth_device *netdev)
2536{
2537 struct ether_priv *priv = (struct ether_priv *)netdev->priv;
2538
2539 _usb_eth_halt(priv);
2540}
2541
Masahiro Yamadaf7ed78b2020-06-26 15:13:33 +09002542int usb_eth_initialize(struct bd_info *bi)
Remy Bohmerdf063442009-07-29 18:18:43 +02002543{
Mugunthan V N88e48be2016-11-18 11:06:13 +05302544 struct eth_device *netdev = &l_priv->netdev;
Remy Bohmerdf063442009-07-29 18:18:43 +02002545
Vitaly Kuzmicheva36cff12010-12-28 16:59:31 +03002546 strlcpy(netdev->name, USB_NET_NAME, sizeof(netdev->name));
Remy Bohmerdf063442009-07-29 18:18:43 +02002547
2548 netdev->init = usb_eth_init;
2549 netdev->send = usb_eth_send;
2550 netdev->recv = usb_eth_recv;
2551 netdev->halt = usb_eth_halt;
Mugunthan V N8ec9c742016-11-18 11:07:18 +05302552 netdev->priv = l_priv;
Remy Bohmerdf063442009-07-29 18:18:43 +02002553
Remy Bohmerdf063442009-07-29 18:18:43 +02002554 eth_register(netdev);
2555 return 0;
Remy Bohmerdf063442009-07-29 18:18:43 +02002556}
Mugunthan V N095b7612016-11-18 11:09:15 +05302557#else
2558static int usb_eth_start(struct udevice *dev)
2559{
2560 struct ether_priv *priv = dev_get_priv(dev);
2561
2562 return _usb_eth_init(priv);
2563}
2564
2565static int usb_eth_send(struct udevice *dev, void *packet, int length)
2566{
2567 struct ether_priv *priv = dev_get_priv(dev);
2568
2569 return _usb_eth_send(priv, packet, length);
2570}
2571
2572static int usb_eth_recv(struct udevice *dev, int flags, uchar **packetp)
2573{
2574 struct ether_priv *priv = dev_get_priv(dev);
2575 struct eth_dev *ethdev = &priv->ethdev;
2576 int ret;
2577
2578 ret = _usb_eth_recv(priv);
2579 if (ret) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002580 pr_err("error packet receive\n");
Mugunthan V N095b7612016-11-18 11:09:15 +05302581 return ret;
2582 }
2583
2584 if (packet_received) {
2585 if (ethdev->rx_req) {
2586 *packetp = (uchar *)net_rx_packets[0];
2587 return ethdev->rx_req->length;
2588 } else {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002589 pr_err("dev->rx_req invalid");
Mugunthan V N095b7612016-11-18 11:09:15 +05302590 return -EFAULT;
2591 }
2592 }
2593
2594 return -EAGAIN;
2595}
2596
2597static int usb_eth_free_pkt(struct udevice *dev, uchar *packet,
2598 int length)
2599{
2600 struct ether_priv *priv = dev_get_priv(dev);
2601 struct eth_dev *ethdev = &priv->ethdev;
2602
2603 packet_received = 0;
2604
2605 return rx_submit(ethdev, ethdev->rx_req, 0);
2606}
2607
2608static void usb_eth_stop(struct udevice *dev)
2609{
2610 struct ether_priv *priv = dev_get_priv(dev);
2611
2612 _usb_eth_halt(priv);
2613}
2614
2615static int usb_eth_probe(struct udevice *dev)
2616{
2617 struct ether_priv *priv = dev_get_priv(dev);
Simon Glassfa20e932020-12-03 16:55:20 -07002618 struct eth_pdata *pdata = dev_get_plat(dev);
Mugunthan V N095b7612016-11-18 11:09:15 +05302619
2620 priv->netdev = dev;
2621 l_priv = priv;
2622
Ignacio Zamora3cf84bb2022-10-08 09:50:56 -05002623 get_ether_addr(CONFIG_USBNET_DEV_ADDR, pdata->enetaddr);
Simon Glass8551d552017-08-03 12:22:11 -06002624 eth_env_set_enetaddr("usbnet_devaddr", pdata->enetaddr);
Mugunthan V N095b7612016-11-18 11:09:15 +05302625
2626 return 0;
2627}
2628
2629static const struct eth_ops usb_eth_ops = {
2630 .start = usb_eth_start,
2631 .send = usb_eth_send,
2632 .recv = usb_eth_recv,
2633 .free_pkt = usb_eth_free_pkt,
2634 .stop = usb_eth_stop,
2635};
2636
2637int usb_ether_init(void)
2638{
Mugunthan V N095b7612016-11-18 11:09:15 +05302639 struct udevice *usb_dev;
2640 int ret;
2641
Michal Suchaneka18b6a52022-10-12 21:57:54 +02002642 uclass_first_device(UCLASS_USB_GADGET_GENERIC, &usb_dev);
2643 if (!usb_dev) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002644 pr_err("No USB device found\n");
Michal Suchaneka18b6a52022-10-12 21:57:54 +02002645 return -ENODEV;
Mugunthan V N095b7612016-11-18 11:09:15 +05302646 }
2647
Michal Suchaneka18b6a52022-10-12 21:57:54 +02002648 ret = device_bind_driver(usb_dev, "usb_ether", "usb_ether", NULL);
2649 if (ret) {
Masahiro Yamada81e10422017-09-16 14:10:41 +09002650 pr_err("usb - not able to bind usb_ether device\n");
Mugunthan V N095b7612016-11-18 11:09:15 +05302651 return ret;
2652 }
2653
2654 return 0;
2655}
2656
2657U_BOOT_DRIVER(eth_usb) = {
2658 .name = "usb_ether",
2659 .id = UCLASS_ETH,
2660 .probe = usb_eth_probe,
2661 .ops = &usb_eth_ops,
Simon Glass8a2b47f2020-12-03 16:55:17 -07002662 .priv_auto = sizeof(struct ether_priv),
Simon Glass71fa5b42020-12-03 16:55:18 -07002663 .plat_auto = sizeof(struct eth_pdata),
Mugunthan V N095b7612016-11-18 11:09:15 +05302664 .flags = DM_FLAG_ALLOC_PRIV_DMA,
2665};
2666#endif /* CONFIG_DM_ETH */