1 /* 2 * f_phonet.c -- USB CDC Phonet function 3 * 4 * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved. 5 * 6 * Author: Rémi Denis-Courmont 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 */ 12 13 #include <linux/mm.h> 14 #include <linux/slab.h> 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/device.h> 18 19 #include <linux/netdevice.h> 20 #include <linux/if_ether.h> 21 #include <linux/if_phonet.h> 22 #include <linux/if_arp.h> 23 24 #include <linux/usb/ch9.h> 25 #include <linux/usb/cdc.h> 26 #include <linux/usb/composite.h> 27 28 #include "u_phonet.h" 29 #include "u_ether.h" 30 31 #define PN_MEDIA_USB 0x1B 32 #define MAXPACKET 512 33 #if (PAGE_SIZE % MAXPACKET) 34 #error MAXPACKET must divide PAGE_SIZE! 35 #endif 36 37 /*-------------------------------------------------------------------------*/ 38 39 struct phonet_port { 40 struct f_phonet *usb; 41 spinlock_t lock; 42 }; 43 44 struct f_phonet { 45 struct usb_function function; 46 struct { 47 struct sk_buff *skb; 48 spinlock_t lock; 49 } rx; 50 struct net_device *dev; 51 struct usb_ep *in_ep, *out_ep; 52 53 struct usb_request *in_req; 54 struct usb_request *out_reqv[0]; 55 }; 56 57 static int phonet_rxq_size = 17; 58 59 static inline struct f_phonet *func_to_pn(struct usb_function *f) 60 { 61 return container_of(f, struct f_phonet, function); 62 } 63 64 /*-------------------------------------------------------------------------*/ 65 66 #define USB_CDC_SUBCLASS_PHONET 0xfe 67 #define USB_CDC_PHONET_TYPE 0xab 68 69 static struct usb_interface_descriptor 70 pn_control_intf_desc = { 71 .bLength = sizeof pn_control_intf_desc, 72 .bDescriptorType = USB_DT_INTERFACE, 73 74 /* .bInterfaceNumber = DYNAMIC, */ 75 .bInterfaceClass = USB_CLASS_COMM, 76 .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET, 77 }; 78 79 static const struct usb_cdc_header_desc 80 pn_header_desc = { 81 .bLength = sizeof pn_header_desc, 82 .bDescriptorType = USB_DT_CS_INTERFACE, 83 .bDescriptorSubType = USB_CDC_HEADER_TYPE, 84 .bcdCDC = cpu_to_le16(0x0110), 85 }; 86 87 static const struct usb_cdc_header_desc 88 pn_phonet_desc = { 89 .bLength = sizeof pn_phonet_desc, 90 .bDescriptorType = USB_DT_CS_INTERFACE, 91 .bDescriptorSubType = USB_CDC_PHONET_TYPE, 92 .bcdCDC = cpu_to_le16(0x1505), /* ??? */ 93 }; 94 95 static struct usb_cdc_union_desc 96 pn_union_desc = { 97 .bLength = sizeof pn_union_desc, 98 .bDescriptorType = USB_DT_CS_INTERFACE, 99 .bDescriptorSubType = USB_CDC_UNION_TYPE, 100 101 /* .bMasterInterface0 = DYNAMIC, */ 102 /* .bSlaveInterface0 = DYNAMIC, */ 103 }; 104 105 static struct usb_interface_descriptor 106 pn_data_nop_intf_desc = { 107 .bLength = sizeof pn_data_nop_intf_desc, 108 .bDescriptorType = USB_DT_INTERFACE, 109 110 /* .bInterfaceNumber = DYNAMIC, */ 111 .bAlternateSetting = 0, 112 .bNumEndpoints = 0, 113 .bInterfaceClass = USB_CLASS_CDC_DATA, 114 }; 115 116 static struct usb_interface_descriptor 117 pn_data_intf_desc = { 118 .bLength = sizeof pn_data_intf_desc, 119 .bDescriptorType = USB_DT_INTERFACE, 120 121 /* .bInterfaceNumber = DYNAMIC, */ 122 .bAlternateSetting = 1, 123 .bNumEndpoints = 2, 124 .bInterfaceClass = USB_CLASS_CDC_DATA, 125 }; 126 127 static struct usb_endpoint_descriptor 128 pn_fs_sink_desc = { 129 .bLength = USB_DT_ENDPOINT_SIZE, 130 .bDescriptorType = USB_DT_ENDPOINT, 131 132 .bEndpointAddress = USB_DIR_OUT, 133 .bmAttributes = USB_ENDPOINT_XFER_BULK, 134 }; 135 136 static struct usb_endpoint_descriptor 137 pn_hs_sink_desc = { 138 .bLength = USB_DT_ENDPOINT_SIZE, 139 .bDescriptorType = USB_DT_ENDPOINT, 140 141 .bEndpointAddress = USB_DIR_OUT, 142 .bmAttributes = USB_ENDPOINT_XFER_BULK, 143 .wMaxPacketSize = cpu_to_le16(MAXPACKET), 144 }; 145 146 static struct usb_endpoint_descriptor 147 pn_fs_source_desc = { 148 .bLength = USB_DT_ENDPOINT_SIZE, 149 .bDescriptorType = USB_DT_ENDPOINT, 150 151 .bEndpointAddress = USB_DIR_IN, 152 .bmAttributes = USB_ENDPOINT_XFER_BULK, 153 }; 154 155 static struct usb_endpoint_descriptor 156 pn_hs_source_desc = { 157 .bLength = USB_DT_ENDPOINT_SIZE, 158 .bDescriptorType = USB_DT_ENDPOINT, 159 160 .bEndpointAddress = USB_DIR_IN, 161 .bmAttributes = USB_ENDPOINT_XFER_BULK, 162 .wMaxPacketSize = cpu_to_le16(512), 163 }; 164 165 static struct usb_descriptor_header *fs_pn_function[] = { 166 (struct usb_descriptor_header *) &pn_control_intf_desc, 167 (struct usb_descriptor_header *) &pn_header_desc, 168 (struct usb_descriptor_header *) &pn_phonet_desc, 169 (struct usb_descriptor_header *) &pn_union_desc, 170 (struct usb_descriptor_header *) &pn_data_nop_intf_desc, 171 (struct usb_descriptor_header *) &pn_data_intf_desc, 172 (struct usb_descriptor_header *) &pn_fs_sink_desc, 173 (struct usb_descriptor_header *) &pn_fs_source_desc, 174 NULL, 175 }; 176 177 static struct usb_descriptor_header *hs_pn_function[] = { 178 (struct usb_descriptor_header *) &pn_control_intf_desc, 179 (struct usb_descriptor_header *) &pn_header_desc, 180 (struct usb_descriptor_header *) &pn_phonet_desc, 181 (struct usb_descriptor_header *) &pn_union_desc, 182 (struct usb_descriptor_header *) &pn_data_nop_intf_desc, 183 (struct usb_descriptor_header *) &pn_data_intf_desc, 184 (struct usb_descriptor_header *) &pn_hs_sink_desc, 185 (struct usb_descriptor_header *) &pn_hs_source_desc, 186 NULL, 187 }; 188 189 /*-------------------------------------------------------------------------*/ 190 191 static int pn_net_open(struct net_device *dev) 192 { 193 netif_wake_queue(dev); 194 return 0; 195 } 196 197 static int pn_net_close(struct net_device *dev) 198 { 199 netif_stop_queue(dev); 200 return 0; 201 } 202 203 static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) 204 { 205 struct f_phonet *fp = ep->driver_data; 206 struct net_device *dev = fp->dev; 207 struct sk_buff *skb = req->context; 208 209 switch (req->status) { 210 case 0: 211 dev->stats.tx_packets++; 212 dev->stats.tx_bytes += skb->len; 213 break; 214 215 case -ESHUTDOWN: /* disconnected */ 216 case -ECONNRESET: /* disabled */ 217 dev->stats.tx_aborted_errors++; 218 default: 219 dev->stats.tx_errors++; 220 } 221 222 dev_kfree_skb_any(skb); 223 netif_wake_queue(dev); 224 } 225 226 static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev) 227 { 228 struct phonet_port *port = netdev_priv(dev); 229 struct f_phonet *fp; 230 struct usb_request *req; 231 unsigned long flags; 232 233 if (skb->protocol != htons(ETH_P_PHONET)) 234 goto out; 235 236 spin_lock_irqsave(&port->lock, flags); 237 fp = port->usb; 238 if (unlikely(!fp)) /* race with carrier loss */ 239 goto out_unlock; 240 241 req = fp->in_req; 242 req->buf = skb->data; 243 req->length = skb->len; 244 req->complete = pn_tx_complete; 245 req->zero = 1; 246 req->context = skb; 247 248 if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC))) 249 goto out_unlock; 250 251 netif_stop_queue(dev); 252 skb = NULL; 253 254 out_unlock: 255 spin_unlock_irqrestore(&port->lock, flags); 256 out: 257 if (unlikely(skb)) { 258 dev_kfree_skb(skb); 259 dev->stats.tx_dropped++; 260 } 261 return NETDEV_TX_OK; 262 } 263 264 static int pn_net_mtu(struct net_device *dev, int new_mtu) 265 { 266 if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) 267 return -EINVAL; 268 dev->mtu = new_mtu; 269 return 0; 270 } 271 272 static const struct net_device_ops pn_netdev_ops = { 273 .ndo_open = pn_net_open, 274 .ndo_stop = pn_net_close, 275 .ndo_start_xmit = pn_net_xmit, 276 .ndo_change_mtu = pn_net_mtu, 277 }; 278 279 static void pn_net_setup(struct net_device *dev) 280 { 281 dev->features = 0; 282 dev->type = ARPHRD_PHONET; 283 dev->flags = IFF_POINTOPOINT | IFF_NOARP; 284 dev->mtu = PHONET_DEV_MTU; 285 dev->hard_header_len = 1; 286 dev->dev_addr[0] = PN_MEDIA_USB; 287 dev->addr_len = 1; 288 dev->tx_queue_len = 1; 289 290 dev->netdev_ops = &pn_netdev_ops; 291 dev->destructor = free_netdev; 292 dev->header_ops = &phonet_header_ops; 293 } 294 295 /*-------------------------------------------------------------------------*/ 296 297 /* 298 * Queue buffer for data from the host 299 */ 300 static int 301 pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags) 302 { 303 struct page *page; 304 int err; 305 306 page = __dev_alloc_page(gfp_flags | __GFP_NOMEMALLOC); 307 if (!page) 308 return -ENOMEM; 309 310 req->buf = page_address(page); 311 req->length = PAGE_SIZE; 312 req->context = page; 313 314 err = usb_ep_queue(fp->out_ep, req, gfp_flags); 315 if (unlikely(err)) 316 put_page(page); 317 return err; 318 } 319 320 static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req) 321 { 322 struct f_phonet *fp = ep->driver_data; 323 struct net_device *dev = fp->dev; 324 struct page *page = req->context; 325 struct sk_buff *skb; 326 unsigned long flags; 327 int status = req->status; 328 329 switch (status) { 330 case 0: 331 spin_lock_irqsave(&fp->rx.lock, flags); 332 skb = fp->rx.skb; 333 if (!skb) 334 skb = fp->rx.skb = netdev_alloc_skb(dev, 12); 335 if (req->actual < req->length) /* Last fragment */ 336 fp->rx.skb = NULL; 337 spin_unlock_irqrestore(&fp->rx.lock, flags); 338 339 if (unlikely(!skb)) 340 break; 341 342 if (skb->len == 0) { /* First fragment */ 343 skb->protocol = htons(ETH_P_PHONET); 344 skb_reset_mac_header(skb); 345 /* Can't use pskb_pull() on page in IRQ */ 346 memcpy(skb_put(skb, 1), page_address(page), 1); 347 } 348 349 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 350 skb->len <= 1, req->actual, PAGE_SIZE); 351 page = NULL; 352 353 if (req->actual < req->length) { /* Last fragment */ 354 skb->dev = dev; 355 dev->stats.rx_packets++; 356 dev->stats.rx_bytes += skb->len; 357 358 netif_rx(skb); 359 } 360 break; 361 362 /* Do not resubmit in these cases: */ 363 case -ESHUTDOWN: /* disconnect */ 364 case -ECONNABORTED: /* hw reset */ 365 case -ECONNRESET: /* dequeued (unlink or netif down) */ 366 req = NULL; 367 break; 368 369 /* Do resubmit in these cases: */ 370 case -EOVERFLOW: /* request buffer overflow */ 371 dev->stats.rx_over_errors++; 372 default: 373 dev->stats.rx_errors++; 374 break; 375 } 376 377 if (page) 378 put_page(page); 379 if (req) 380 pn_rx_submit(fp, req, GFP_ATOMIC); 381 } 382 383 /*-------------------------------------------------------------------------*/ 384 385 static void __pn_reset(struct usb_function *f) 386 { 387 struct f_phonet *fp = func_to_pn(f); 388 struct net_device *dev = fp->dev; 389 struct phonet_port *port = netdev_priv(dev); 390 391 netif_carrier_off(dev); 392 port->usb = NULL; 393 394 usb_ep_disable(fp->out_ep); 395 usb_ep_disable(fp->in_ep); 396 if (fp->rx.skb) { 397 dev_kfree_skb_irq(fp->rx.skb); 398 fp->rx.skb = NULL; 399 } 400 } 401 402 static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 403 { 404 struct f_phonet *fp = func_to_pn(f); 405 struct usb_gadget *gadget = fp->function.config->cdev->gadget; 406 407 if (intf == pn_control_intf_desc.bInterfaceNumber) 408 /* control interface, no altsetting */ 409 return (alt > 0) ? -EINVAL : 0; 410 411 if (intf == pn_data_intf_desc.bInterfaceNumber) { 412 struct net_device *dev = fp->dev; 413 struct phonet_port *port = netdev_priv(dev); 414 415 /* data intf (0: inactive, 1: active) */ 416 if (alt > 1) 417 return -EINVAL; 418 419 spin_lock(&port->lock); 420 __pn_reset(f); 421 if (alt == 1) { 422 int i; 423 424 if (config_ep_by_speed(gadget, f, fp->in_ep) || 425 config_ep_by_speed(gadget, f, fp->out_ep)) { 426 fp->in_ep->desc = NULL; 427 fp->out_ep->desc = NULL; 428 spin_unlock(&port->lock); 429 return -EINVAL; 430 } 431 usb_ep_enable(fp->out_ep); 432 usb_ep_enable(fp->in_ep); 433 434 port->usb = fp; 435 fp->out_ep->driver_data = fp; 436 fp->in_ep->driver_data = fp; 437 438 netif_carrier_on(dev); 439 for (i = 0; i < phonet_rxq_size; i++) 440 pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC); 441 } 442 spin_unlock(&port->lock); 443 return 0; 444 } 445 446 return -EINVAL; 447 } 448 449 static int pn_get_alt(struct usb_function *f, unsigned intf) 450 { 451 struct f_phonet *fp = func_to_pn(f); 452 453 if (intf == pn_control_intf_desc.bInterfaceNumber) 454 return 0; 455 456 if (intf == pn_data_intf_desc.bInterfaceNumber) { 457 struct phonet_port *port = netdev_priv(fp->dev); 458 u8 alt; 459 460 spin_lock(&port->lock); 461 alt = port->usb != NULL; 462 spin_unlock(&port->lock); 463 return alt; 464 } 465 466 return -EINVAL; 467 } 468 469 static void pn_disconnect(struct usb_function *f) 470 { 471 struct f_phonet *fp = func_to_pn(f); 472 struct phonet_port *port = netdev_priv(fp->dev); 473 unsigned long flags; 474 475 /* remain disabled until set_alt */ 476 spin_lock_irqsave(&port->lock, flags); 477 __pn_reset(f); 478 spin_unlock_irqrestore(&port->lock, flags); 479 } 480 481 /*-------------------------------------------------------------------------*/ 482 483 static int pn_bind(struct usb_configuration *c, struct usb_function *f) 484 { 485 struct usb_composite_dev *cdev = c->cdev; 486 struct usb_gadget *gadget = cdev->gadget; 487 struct f_phonet *fp = func_to_pn(f); 488 struct usb_ep *ep; 489 int status, i; 490 491 struct f_phonet_opts *phonet_opts; 492 493 phonet_opts = container_of(f->fi, struct f_phonet_opts, func_inst); 494 495 /* 496 * in drivers/usb/gadget/configfs.c:configfs_composite_bind() 497 * configurations are bound in sequence with list_for_each_entry, 498 * in each configuration its functions are bound in sequence 499 * with list_for_each_entry, so we assume no race condition 500 * with regard to phonet_opts->bound access 501 */ 502 if (!phonet_opts->bound) { 503 gphonet_set_gadget(phonet_opts->net, gadget); 504 status = gphonet_register_netdev(phonet_opts->net); 505 if (status) 506 return status; 507 phonet_opts->bound = true; 508 } 509 510 /* Reserve interface IDs */ 511 status = usb_interface_id(c, f); 512 if (status < 0) 513 goto err; 514 pn_control_intf_desc.bInterfaceNumber = status; 515 pn_union_desc.bMasterInterface0 = status; 516 517 status = usb_interface_id(c, f); 518 if (status < 0) 519 goto err; 520 pn_data_nop_intf_desc.bInterfaceNumber = status; 521 pn_data_intf_desc.bInterfaceNumber = status; 522 pn_union_desc.bSlaveInterface0 = status; 523 524 /* Reserve endpoints */ 525 status = -ENODEV; 526 ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc); 527 if (!ep) 528 goto err; 529 fp->out_ep = ep; 530 ep->driver_data = fp; /* Claim */ 531 532 ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc); 533 if (!ep) 534 goto err; 535 fp->in_ep = ep; 536 ep->driver_data = fp; /* Claim */ 537 538 pn_hs_sink_desc.bEndpointAddress = pn_fs_sink_desc.bEndpointAddress; 539 pn_hs_source_desc.bEndpointAddress = pn_fs_source_desc.bEndpointAddress; 540 541 /* Do not try to bind Phonet twice... */ 542 status = usb_assign_descriptors(f, fs_pn_function, hs_pn_function, 543 NULL); 544 if (status) 545 goto err; 546 547 /* Incoming USB requests */ 548 status = -ENOMEM; 549 for (i = 0; i < phonet_rxq_size; i++) { 550 struct usb_request *req; 551 552 req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL); 553 if (!req) 554 goto err_req; 555 556 req->complete = pn_rx_complete; 557 fp->out_reqv[i] = req; 558 } 559 560 /* Outgoing USB requests */ 561 fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL); 562 if (!fp->in_req) 563 goto err_req; 564 565 INFO(cdev, "USB CDC Phonet function\n"); 566 INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name, 567 fp->out_ep->name, fp->in_ep->name); 568 return 0; 569 570 err_req: 571 for (i = 0; i < phonet_rxq_size && fp->out_reqv[i]; i++) 572 usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); 573 usb_free_all_descriptors(f); 574 err: 575 if (fp->out_ep) 576 fp->out_ep->driver_data = NULL; 577 if (fp->in_ep) 578 fp->in_ep->driver_data = NULL; 579 ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n"); 580 return status; 581 } 582 583 static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item) 584 { 585 return container_of(to_config_group(item), struct f_phonet_opts, 586 func_inst.group); 587 } 588 589 CONFIGFS_ATTR_STRUCT(f_phonet_opts); 590 static ssize_t f_phonet_attr_show(struct config_item *item, 591 struct configfs_attribute *attr, 592 char *page) 593 { 594 struct f_phonet_opts *opts = to_f_phonet_opts(item); 595 struct f_phonet_opts_attribute *f_phonet_opts_attr = 596 container_of(attr, struct f_phonet_opts_attribute, attr); 597 ssize_t ret = 0; 598 599 if (f_phonet_opts_attr->show) 600 ret = f_phonet_opts_attr->show(opts, page); 601 return ret; 602 } 603 604 static void phonet_attr_release(struct config_item *item) 605 { 606 struct f_phonet_opts *opts = to_f_phonet_opts(item); 607 608 usb_put_function_instance(&opts->func_inst); 609 } 610 611 static struct configfs_item_operations phonet_item_ops = { 612 .release = phonet_attr_release, 613 .show_attribute = f_phonet_attr_show, 614 }; 615 616 static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page) 617 { 618 return gether_get_ifname(opts->net, page, PAGE_SIZE); 619 } 620 621 static struct f_phonet_opts_attribute f_phonet_ifname = 622 __CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show); 623 624 static struct configfs_attribute *phonet_attrs[] = { 625 &f_phonet_ifname.attr, 626 NULL, 627 }; 628 629 static struct config_item_type phonet_func_type = { 630 .ct_item_ops = &phonet_item_ops, 631 .ct_attrs = phonet_attrs, 632 .ct_owner = THIS_MODULE, 633 }; 634 635 static void phonet_free_inst(struct usb_function_instance *f) 636 { 637 struct f_phonet_opts *opts; 638 639 opts = container_of(f, struct f_phonet_opts, func_inst); 640 if (opts->bound) 641 gphonet_cleanup(opts->net); 642 else 643 free_netdev(opts->net); 644 kfree(opts); 645 } 646 647 static struct usb_function_instance *phonet_alloc_inst(void) 648 { 649 struct f_phonet_opts *opts; 650 651 opts = kzalloc(sizeof(*opts), GFP_KERNEL); 652 if (!opts) 653 return ERR_PTR(-ENOMEM); 654 655 opts->func_inst.free_func_inst = phonet_free_inst; 656 opts->net = gphonet_setup_default(); 657 if (IS_ERR(opts->net)) { 658 struct net_device *net = opts->net; 659 kfree(opts); 660 return ERR_CAST(net); 661 } 662 663 config_group_init_type_name(&opts->func_inst.group, "", 664 &phonet_func_type); 665 666 return &opts->func_inst; 667 } 668 669 static void phonet_free(struct usb_function *f) 670 { 671 struct f_phonet *phonet; 672 673 phonet = func_to_pn(f); 674 kfree(phonet); 675 } 676 677 static void pn_unbind(struct usb_configuration *c, struct usb_function *f) 678 { 679 struct f_phonet *fp = func_to_pn(f); 680 int i; 681 682 /* We are already disconnected */ 683 if (fp->in_req) 684 usb_ep_free_request(fp->in_ep, fp->in_req); 685 for (i = 0; i < phonet_rxq_size; i++) 686 if (fp->out_reqv[i]) 687 usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); 688 689 usb_free_all_descriptors(f); 690 } 691 692 static struct usb_function *phonet_alloc(struct usb_function_instance *fi) 693 { 694 struct f_phonet *fp; 695 struct f_phonet_opts *opts; 696 int size; 697 698 size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *)); 699 fp = kzalloc(size, GFP_KERNEL); 700 if (!fp) 701 return ERR_PTR(-ENOMEM); 702 703 opts = container_of(fi, struct f_phonet_opts, func_inst); 704 705 fp->dev = opts->net; 706 fp->function.name = "phonet"; 707 fp->function.bind = pn_bind; 708 fp->function.unbind = pn_unbind; 709 fp->function.set_alt = pn_set_alt; 710 fp->function.get_alt = pn_get_alt; 711 fp->function.disable = pn_disconnect; 712 fp->function.free_func = phonet_free; 713 spin_lock_init(&fp->rx.lock); 714 715 return &fp->function; 716 } 717 718 struct net_device *gphonet_setup_default(void) 719 { 720 struct net_device *dev; 721 struct phonet_port *port; 722 723 /* Create net device */ 724 dev = alloc_netdev(sizeof(*port), "upnlink%d", NET_NAME_UNKNOWN, 725 pn_net_setup); 726 if (!dev) 727 return ERR_PTR(-ENOMEM); 728 729 port = netdev_priv(dev); 730 spin_lock_init(&port->lock); 731 netif_carrier_off(dev); 732 733 return dev; 734 } 735 736 void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g) 737 { 738 SET_NETDEV_DEV(net, &g->dev); 739 } 740 741 int gphonet_register_netdev(struct net_device *net) 742 { 743 int status; 744 745 status = register_netdev(net); 746 if (status) 747 free_netdev(net); 748 749 return status; 750 } 751 752 void gphonet_cleanup(struct net_device *dev) 753 { 754 unregister_netdev(dev); 755 } 756 757 DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc); 758 MODULE_AUTHOR("Rémi Denis-Courmont"); 759 MODULE_LICENSE("GPL"); 760