hso.c revision c213f286f2cf6590f83f541f66a625ee8d20c6f4
1/****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 7 * <ajb@spheresystems.co.uk> 8 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 9 * Copyright (C) 2008 Novell, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 23 * USA 24 * 25 * 26 *****************************************************************************/ 27 28/****************************************************************************** 29 * 30 * Description of the device: 31 * 32 * Interface 0: Contains the IP network interface on the bulk end points. 33 * The multiplexed serial ports are using the interrupt and 34 * control endpoints. 35 * Interrupt contains a bitmap telling which multiplexed 36 * serialport needs servicing. 37 * 38 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 39 * port is opened, as this have a huge impact on the network port 40 * throughput. 41 * 42 * Interface 2: Standard modem interface - circuit switched interface, should 43 * not be used. 44 * 45 *****************************************************************************/ 46 47#include <linux/sched.h> 48#include <linux/slab.h> 49#include <linux/init.h> 50#include <linux/delay.h> 51#include <linux/netdevice.h> 52#include <linux/module.h> 53#include <linux/ethtool.h> 54#include <linux/usb.h> 55#include <linux/timer.h> 56#include <linux/tty.h> 57#include <linux/tty_driver.h> 58#include <linux/tty_flip.h> 59#include <linux/kmod.h> 60#include <linux/rfkill.h> 61#include <linux/ip.h> 62#include <linux/uaccess.h> 63#include <linux/usb/cdc.h> 64#include <net/arp.h> 65#include <asm/byteorder.h> 66 67 68#define DRIVER_VERSION "1.2" 69#define MOD_AUTHOR "Option Wireless" 70#define MOD_DESCRIPTION "USB High Speed Option driver" 71#define MOD_LICENSE "GPL" 72 73#define HSO_MAX_NET_DEVICES 10 74#define HSO__MAX_MTU 2048 75#define DEFAULT_MTU 1500 76#define DEFAULT_MRU 1500 77 78#define CTRL_URB_RX_SIZE 1024 79#define CTRL_URB_TX_SIZE 64 80 81#define BULK_URB_RX_SIZE 4096 82#define BULK_URB_TX_SIZE 8192 83 84#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 85#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 86#define MUX_BULK_RX_BUF_COUNT 4 87#define USB_TYPE_OPTION_VENDOR 0x20 88 89/* These definitions are used with the struct hso_net flags element */ 90/* - use *_bit operations on it. (bit indices not values.) */ 91#define HSO_NET_RUNNING 0 92 93#define HSO_NET_TX_TIMEOUT (HZ*10) 94 95/* Serial port defines and structs. */ 96#define HSO_SERIAL_FLAG_RX_SENT 0 97 98#define HSO_SERIAL_MAGIC 0x48534f31 99 100/* Number of ttys to handle */ 101#define HSO_SERIAL_TTY_MINORS 256 102 103#define MAX_RX_URBS 2 104 105static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 106{ 107 if (tty) 108 return tty->driver_data; 109 return NULL; 110} 111 112/*****************************************************************************/ 113/* Debugging functions */ 114/*****************************************************************************/ 115#define D__(lvl_, fmt, arg...) \ 116 do { \ 117 printk(lvl_ "[%d:%s]: " fmt "\n", \ 118 __LINE__, __func__, ## arg); \ 119 } while (0) 120 121#define D_(lvl, args...) \ 122 do { \ 123 if (lvl & debug) \ 124 D__(KERN_INFO, args); \ 125 } while (0) 126 127#define D1(args...) D_(0x01, ##args) 128#define D2(args...) D_(0x02, ##args) 129#define D3(args...) D_(0x04, ##args) 130#define D4(args...) D_(0x08, ##args) 131#define D5(args...) D_(0x10, ##args) 132 133/*****************************************************************************/ 134/* Enumerators */ 135/*****************************************************************************/ 136enum pkt_parse_state { 137 WAIT_IP, 138 WAIT_DATA, 139 WAIT_SYNC 140}; 141 142/*****************************************************************************/ 143/* Structs */ 144/*****************************************************************************/ 145 146struct hso_shared_int { 147 struct usb_endpoint_descriptor *intr_endp; 148 void *shared_intr_buf; 149 struct urb *shared_intr_urb; 150 struct usb_device *usb; 151 int use_count; 152 int ref_count; 153 struct mutex shared_int_lock; 154}; 155 156struct hso_net { 157 struct hso_device *parent; 158 struct net_device *net; 159 struct rfkill *rfkill; 160 161 struct usb_endpoint_descriptor *in_endp; 162 struct usb_endpoint_descriptor *out_endp; 163 164 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 165 struct urb *mux_bulk_tx_urb; 166 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 167 void *mux_bulk_tx_buf; 168 169 struct sk_buff *skb_rx_buf; 170 struct sk_buff *skb_tx_buf; 171 172 enum pkt_parse_state rx_parse_state; 173 spinlock_t net_lock; 174 175 unsigned short rx_buf_size; 176 unsigned short rx_buf_missing; 177 struct iphdr rx_ip_hdr; 178 179 unsigned long flags; 180}; 181 182struct hso_serial { 183 struct hso_device *parent; 184 int magic; 185 u8 minor; 186 187 struct hso_shared_int *shared_int; 188 189 /* rx/tx urb could be either a bulk urb or a control urb depending 190 on which serial port it is used on. */ 191 struct urb *rx_urb[MAX_RX_URBS]; 192 u8 num_rx_urbs; 193 u8 *rx_data[MAX_RX_URBS]; 194 u16 rx_data_length; /* should contain allocated length */ 195 196 struct urb *tx_urb; 197 u8 *tx_data; 198 u8 *tx_buffer; 199 u16 tx_data_length; /* should contain allocated length */ 200 u16 tx_data_count; 201 u16 tx_buffer_count; 202 struct usb_ctrlrequest ctrl_req_tx; 203 struct usb_ctrlrequest ctrl_req_rx; 204 205 struct usb_endpoint_descriptor *in_endp; 206 struct usb_endpoint_descriptor *out_endp; 207 208 unsigned long flags; 209 u8 rts_state; 210 u8 dtr_state; 211 unsigned tx_urb_used:1; 212 213 /* from usb_serial_port */ 214 struct tty_struct *tty; 215 int open_count; 216 spinlock_t serial_lock; 217 218 int (*write_data) (struct hso_serial *serial); 219}; 220 221struct hso_device { 222 union { 223 struct hso_serial *dev_serial; 224 struct hso_net *dev_net; 225 } port_data; 226 227 u32 port_spec; 228 229 u8 is_active; 230 u8 usb_gone; 231 struct work_struct async_get_intf; 232 struct work_struct async_put_intf; 233 234 struct usb_device *usb; 235 struct usb_interface *interface; 236 237 struct device *dev; 238 struct kref ref; 239 struct mutex mutex; 240}; 241 242/* Type of interface */ 243#define HSO_INTF_MASK 0xFF00 244#define HSO_INTF_MUX 0x0100 245#define HSO_INTF_BULK 0x0200 246 247/* Type of port */ 248#define HSO_PORT_MASK 0xFF 249#define HSO_PORT_NO_PORT 0x0 250#define HSO_PORT_CONTROL 0x1 251#define HSO_PORT_APP 0x2 252#define HSO_PORT_GPS 0x3 253#define HSO_PORT_PCSC 0x4 254#define HSO_PORT_APP2 0x5 255#define HSO_PORT_GPS_CONTROL 0x6 256#define HSO_PORT_MSD 0x7 257#define HSO_PORT_VOICE 0x8 258#define HSO_PORT_DIAG2 0x9 259#define HSO_PORT_DIAG 0x10 260#define HSO_PORT_MODEM 0x11 261#define HSO_PORT_NETWORK 0x12 262 263/* Additional device info */ 264#define HSO_INFO_MASK 0xFF000000 265#define HSO_INFO_CRC_BUG 0x01000000 266 267/*****************************************************************************/ 268/* Prototypes */ 269/*****************************************************************************/ 270/* Serial driver functions */ 271static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 272 unsigned int set, unsigned int clear); 273static void ctrl_callback(struct urb *urb); 274static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 275static void hso_kick_transmit(struct hso_serial *serial); 276/* Helper functions */ 277static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 278 struct usb_device *usb, gfp_t gfp); 279static void log_usb_status(int status, const char *function); 280static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 281 int type, int dir); 282static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 283static void hso_free_interface(struct usb_interface *intf); 284static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 285static int hso_stop_serial_device(struct hso_device *hso_dev); 286static int hso_start_net_device(struct hso_device *hso_dev); 287static void hso_free_shared_int(struct hso_shared_int *shared_int); 288static int hso_stop_net_device(struct hso_device *hso_dev); 289static void hso_serial_ref_free(struct kref *ref); 290static void async_get_intf(struct work_struct *data); 291static void async_put_intf(struct work_struct *data); 292static int hso_put_activity(struct hso_device *hso_dev); 293static int hso_get_activity(struct hso_device *hso_dev); 294 295/*****************************************************************************/ 296/* Helping functions */ 297/*****************************************************************************/ 298 299/* #define DEBUG */ 300 301static inline struct hso_net *dev2net(struct hso_device *hso_dev) 302{ 303 return hso_dev->port_data.dev_net; 304} 305 306static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 307{ 308 return hso_dev->port_data.dev_serial; 309} 310 311/* Debugging functions */ 312#ifdef DEBUG 313static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 314 unsigned int len) 315{ 316 static char name[255]; 317 318 sprintf(name, "hso[%d:%s]", line_count, func_name); 319 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 320} 321 322#define DUMP(buf_, len_) \ 323 dbg_dump(__LINE__, __func__, buf_, len_) 324 325#define DUMP1(buf_, len_) \ 326 do { \ 327 if (0x01 & debug) \ 328 DUMP(buf_, len_); \ 329 } while (0) 330#else 331#define DUMP(buf_, len_) 332#define DUMP1(buf_, len_) 333#endif 334 335/* module parameters */ 336static int debug; 337static int tty_major; 338static int disable_net; 339 340/* driver info */ 341static const char driver_name[] = "hso"; 342static const char tty_filename[] = "ttyHS"; 343static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; 344/* the usb driver itself (registered in hso_init) */ 345static struct usb_driver hso_driver; 346/* serial structures */ 347static struct tty_driver *tty_drv; 348static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 349static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 350static spinlock_t serial_table_lock; 351static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS]; 352static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS]; 353 354static const s32 default_port_spec[] = { 355 HSO_INTF_MUX | HSO_PORT_NETWORK, 356 HSO_INTF_BULK | HSO_PORT_DIAG, 357 HSO_INTF_BULK | HSO_PORT_MODEM, 358 0 359}; 360 361static const s32 icon321_port_spec[] = { 362 HSO_INTF_MUX | HSO_PORT_NETWORK, 363 HSO_INTF_BULK | HSO_PORT_DIAG2, 364 HSO_INTF_BULK | HSO_PORT_MODEM, 365 HSO_INTF_BULK | HSO_PORT_DIAG, 366 0 367}; 368 369#define default_port_device(vendor, product) \ 370 USB_DEVICE(vendor, product), \ 371 .driver_info = (kernel_ulong_t)default_port_spec 372 373#define icon321_port_device(vendor, product) \ 374 USB_DEVICE(vendor, product), \ 375 .driver_info = (kernel_ulong_t)icon321_port_spec 376 377/* list of devices we support */ 378static const struct usb_device_id hso_ids[] = { 379 {default_port_device(0x0af0, 0x6711)}, 380 {default_port_device(0x0af0, 0x6731)}, 381 {default_port_device(0x0af0, 0x6751)}, 382 {default_port_device(0x0af0, 0x6771)}, 383 {default_port_device(0x0af0, 0x6791)}, 384 {default_port_device(0x0af0, 0x6811)}, 385 {default_port_device(0x0af0, 0x6911)}, 386 {default_port_device(0x0af0, 0x6951)}, 387 {default_port_device(0x0af0, 0x6971)}, 388 {default_port_device(0x0af0, 0x7011)}, 389 {default_port_device(0x0af0, 0x7031)}, 390 {default_port_device(0x0af0, 0x7051)}, 391 {default_port_device(0x0af0, 0x7071)}, 392 {default_port_device(0x0af0, 0x7111)}, 393 {default_port_device(0x0af0, 0x7211)}, 394 {default_port_device(0x0af0, 0x7251)}, 395 {default_port_device(0x0af0, 0x7271)}, 396 {default_port_device(0x0af0, 0x7311)}, 397 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 398 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 399 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 400 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 401 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 402 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 403 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 404 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 405 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 406 {} 407}; 408MODULE_DEVICE_TABLE(usb, hso_ids); 409 410/* Sysfs attribute */ 411static ssize_t hso_sysfs_show_porttype(struct device *dev, 412 struct device_attribute *attr, 413 char *buf) 414{ 415 struct hso_device *hso_dev = dev->driver_data; 416 char *port_name; 417 418 if (!hso_dev) 419 return 0; 420 421 switch (hso_dev->port_spec & HSO_PORT_MASK) { 422 case HSO_PORT_CONTROL: 423 port_name = "Control"; 424 break; 425 case HSO_PORT_APP: 426 port_name = "Application"; 427 break; 428 case HSO_PORT_APP2: 429 port_name = "Application2"; 430 break; 431 case HSO_PORT_GPS: 432 port_name = "GPS"; 433 break; 434 case HSO_PORT_GPS_CONTROL: 435 port_name = "GPS Control"; 436 break; 437 case HSO_PORT_PCSC: 438 port_name = "PCSC"; 439 break; 440 case HSO_PORT_DIAG: 441 port_name = "Diagnostic"; 442 break; 443 case HSO_PORT_DIAG2: 444 port_name = "Diagnostic2"; 445 break; 446 case HSO_PORT_MODEM: 447 port_name = "Modem"; 448 break; 449 case HSO_PORT_NETWORK: 450 port_name = "Network"; 451 break; 452 default: 453 port_name = "Unknown"; 454 break; 455 } 456 457 return sprintf(buf, "%s\n", port_name); 458} 459static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 460 461/* converts mux value to a port spec value */ 462static u32 hso_mux_to_port(int mux) 463{ 464 u32 result; 465 466 switch (mux) { 467 case 0x1: 468 result = HSO_PORT_CONTROL; 469 break; 470 case 0x2: 471 result = HSO_PORT_APP; 472 break; 473 case 0x4: 474 result = HSO_PORT_PCSC; 475 break; 476 case 0x8: 477 result = HSO_PORT_GPS; 478 break; 479 case 0x10: 480 result = HSO_PORT_APP2; 481 break; 482 default: 483 result = HSO_PORT_NO_PORT; 484 } 485 return result; 486} 487 488/* converts port spec value to a mux value */ 489static u32 hso_port_to_mux(int port) 490{ 491 u32 result; 492 493 switch (port & HSO_PORT_MASK) { 494 case HSO_PORT_CONTROL: 495 result = 0x0; 496 break; 497 case HSO_PORT_APP: 498 result = 0x1; 499 break; 500 case HSO_PORT_PCSC: 501 result = 0x2; 502 break; 503 case HSO_PORT_GPS: 504 result = 0x3; 505 break; 506 case HSO_PORT_APP2: 507 result = 0x4; 508 break; 509 default: 510 result = 0x0; 511 } 512 return result; 513} 514 515static struct hso_serial *get_serial_by_shared_int_and_type( 516 struct hso_shared_int *shared_int, 517 int mux) 518{ 519 int i, port; 520 521 port = hso_mux_to_port(mux); 522 523 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 524 if (serial_table[i] 525 && (dev2ser(serial_table[i])->shared_int == shared_int) 526 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 527 return dev2ser(serial_table[i]); 528 } 529 } 530 531 return NULL; 532} 533 534static struct hso_serial *get_serial_by_index(unsigned index) 535{ 536 struct hso_serial *serial = NULL; 537 unsigned long flags; 538 539 spin_lock_irqsave(&serial_table_lock, flags); 540 if (serial_table[index]) 541 serial = dev2ser(serial_table[index]); 542 spin_unlock_irqrestore(&serial_table_lock, flags); 543 544 return serial; 545} 546 547static int get_free_serial_index(void) 548{ 549 int index; 550 unsigned long flags; 551 552 spin_lock_irqsave(&serial_table_lock, flags); 553 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 554 if (serial_table[index] == NULL) { 555 spin_unlock_irqrestore(&serial_table_lock, flags); 556 return index; 557 } 558 } 559 spin_unlock_irqrestore(&serial_table_lock, flags); 560 561 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 562 return -1; 563} 564 565static void set_serial_by_index(unsigned index, struct hso_serial *serial) 566{ 567 unsigned long flags; 568 569 spin_lock_irqsave(&serial_table_lock, flags); 570 if (serial) 571 serial_table[index] = serial->parent; 572 else 573 serial_table[index] = NULL; 574 spin_unlock_irqrestore(&serial_table_lock, flags); 575} 576 577/* log a meaningful explanation of an USB status */ 578static void log_usb_status(int status, const char *function) 579{ 580 char *explanation; 581 582 switch (status) { 583 case -ENODEV: 584 explanation = "no device"; 585 break; 586 case -ENOENT: 587 explanation = "endpoint not enabled"; 588 break; 589 case -EPIPE: 590 explanation = "endpoint stalled"; 591 break; 592 case -ENOSPC: 593 explanation = "not enough bandwidth"; 594 break; 595 case -ESHUTDOWN: 596 explanation = "device disabled"; 597 break; 598 case -EHOSTUNREACH: 599 explanation = "device suspended"; 600 break; 601 case -EINVAL: 602 case -EAGAIN: 603 case -EFBIG: 604 case -EMSGSIZE: 605 explanation = "internal error"; 606 break; 607 default: 608 explanation = "unknown status"; 609 break; 610 } 611 D1("%s: received USB status - %s (%d)", function, explanation, status); 612} 613 614/* Network interface functions */ 615 616/* called when net interface is brought up by ifconfig */ 617static int hso_net_open(struct net_device *net) 618{ 619 struct hso_net *odev = netdev_priv(net); 620 unsigned long flags = 0; 621 622 if (!odev) { 623 dev_err(&net->dev, "No net device !\n"); 624 return -ENODEV; 625 } 626 627 odev->skb_tx_buf = NULL; 628 629 /* setup environment */ 630 spin_lock_irqsave(&odev->net_lock, flags); 631 odev->rx_parse_state = WAIT_IP; 632 odev->rx_buf_size = 0; 633 odev->rx_buf_missing = sizeof(struct iphdr); 634 spin_unlock_irqrestore(&odev->net_lock, flags); 635 636 hso_start_net_device(odev->parent); 637 638 /* We are up and running. */ 639 set_bit(HSO_NET_RUNNING, &odev->flags); 640 641 /* Tell the kernel we are ready to start receiving from it */ 642 netif_start_queue(net); 643 644 return 0; 645} 646 647/* called when interface is brought down by ifconfig */ 648static int hso_net_close(struct net_device *net) 649{ 650 struct hso_net *odev = netdev_priv(net); 651 652 /* we don't need the queue anymore */ 653 netif_stop_queue(net); 654 /* no longer running */ 655 clear_bit(HSO_NET_RUNNING, &odev->flags); 656 657 hso_stop_net_device(odev->parent); 658 659 /* done */ 660 return 0; 661} 662 663/* USB tells is xmit done, we should start the netqueue again */ 664static void write_bulk_callback(struct urb *urb) 665{ 666 struct hso_net *odev = urb->context; 667 int status = urb->status; 668 669 /* Sanity check */ 670 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 671 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 672 return; 673 } 674 675 /* Do we still have a valid kernel network device? */ 676 if (!netif_device_present(odev->net)) { 677 dev_err(&urb->dev->dev, "%s: net device not present\n", 678 __func__); 679 return; 680 } 681 682 /* log status, but don't act on it, we don't need to resubmit anything 683 * anyhow */ 684 if (status) 685 log_usb_status(status, __func__); 686 687 hso_put_activity(odev->parent); 688 689 /* Tell the network interface we are ready for another frame */ 690 netif_wake_queue(odev->net); 691} 692 693/* called by kernel when we need to transmit a packet */ 694static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) 695{ 696 struct hso_net *odev = netdev_priv(net); 697 int result; 698 699 /* Tell the kernel, "No more frames 'til we are done with this one." */ 700 netif_stop_queue(net); 701 if (hso_get_activity(odev->parent) == -EAGAIN) { 702 odev->skb_tx_buf = skb; 703 return 0; 704 } 705 706 /* log if asked */ 707 DUMP1(skb->data, skb->len); 708 /* Copy it from kernel memory to OUR memory */ 709 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 710 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 711 712 /* Fill in the URB for shipping it out. */ 713 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 714 odev->parent->usb, 715 usb_sndbulkpipe(odev->parent->usb, 716 odev->out_endp-> 717 bEndpointAddress & 0x7F), 718 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 719 odev); 720 721 /* Deal with the Zero Length packet problem, I hope */ 722 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 723 724 /* Send the URB on its merry way. */ 725 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 726 if (result) { 727 dev_warn(&odev->parent->interface->dev, 728 "failed mux_bulk_tx_urb %d", result); 729 net->stats.tx_errors++; 730 netif_start_queue(net); 731 } else { 732 net->stats.tx_packets++; 733 net->stats.tx_bytes += skb->len; 734 /* And tell the kernel when the last transmit started. */ 735 net->trans_start = jiffies; 736 } 737 dev_kfree_skb(skb); 738 /* we're done */ 739 return result; 740} 741 742static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 743{ 744 struct hso_net *odev = netdev_priv(net); 745 746 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 747 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 748 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 749} 750 751static struct ethtool_ops ops = { 752 .get_drvinfo = hso_get_drvinfo, 753 .get_link = ethtool_op_get_link 754}; 755 756/* called when a packet did not ack after watchdogtimeout */ 757static void hso_net_tx_timeout(struct net_device *net) 758{ 759 struct hso_net *odev = netdev_priv(net); 760 761 if (!odev) 762 return; 763 764 /* Tell syslog we are hosed. */ 765 dev_warn(&net->dev, "Tx timed out.\n"); 766 767 /* Tear the waiting frame off the list */ 768 if (odev->mux_bulk_tx_urb 769 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 770 usb_unlink_urb(odev->mux_bulk_tx_urb); 771 772 /* Update statistics */ 773 net->stats.tx_errors++; 774} 775 776/* make a real packet from the received USB buffer */ 777static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 778 unsigned int count, unsigned char is_eop) 779{ 780 unsigned short temp_bytes; 781 unsigned short buffer_offset = 0; 782 unsigned short frame_len; 783 unsigned char *tmp_rx_buf; 784 785 /* log if needed */ 786 D1("Rx %d bytes", count); 787 DUMP(ip_pkt, min(128, (int)count)); 788 789 while (count) { 790 switch (odev->rx_parse_state) { 791 case WAIT_IP: 792 /* waiting for IP header. */ 793 /* wanted bytes - size of ip header */ 794 temp_bytes = 795 (count < 796 odev->rx_buf_missing) ? count : odev-> 797 rx_buf_missing; 798 799 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 800 odev->rx_buf_size, ip_pkt + buffer_offset, 801 temp_bytes); 802 803 odev->rx_buf_size += temp_bytes; 804 buffer_offset += temp_bytes; 805 odev->rx_buf_missing -= temp_bytes; 806 count -= temp_bytes; 807 808 if (!odev->rx_buf_missing) { 809 /* header is complete allocate an sk_buffer and 810 * continue to WAIT_DATA */ 811 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 812 813 if ((frame_len > DEFAULT_MRU) || 814 (frame_len < sizeof(struct iphdr))) { 815 dev_err(&odev->net->dev, 816 "Invalid frame (%d) length\n", 817 frame_len); 818 odev->rx_parse_state = WAIT_SYNC; 819 continue; 820 } 821 /* Allocate an sk_buff */ 822 odev->skb_rx_buf = dev_alloc_skb(frame_len); 823 if (!odev->skb_rx_buf) { 824 /* We got no receive buffer. */ 825 D1("could not allocate memory"); 826 odev->rx_parse_state = WAIT_SYNC; 827 return; 828 } 829 /* Here's where it came from */ 830 odev->skb_rx_buf->dev = odev->net; 831 832 /* Copy what we got so far. make room for iphdr 833 * after tail. */ 834 tmp_rx_buf = 835 skb_put(odev->skb_rx_buf, 836 sizeof(struct iphdr)); 837 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 838 sizeof(struct iphdr)); 839 840 /* ETH_HLEN */ 841 odev->rx_buf_size = sizeof(struct iphdr); 842 843 /* Filip actually use .tot_len */ 844 odev->rx_buf_missing = 845 frame_len - sizeof(struct iphdr); 846 odev->rx_parse_state = WAIT_DATA; 847 } 848 break; 849 850 case WAIT_DATA: 851 temp_bytes = (count < odev->rx_buf_missing) 852 ? count : odev->rx_buf_missing; 853 854 /* Copy the rest of the bytes that are left in the 855 * buffer into the waiting sk_buf. */ 856 /* Make room for temp_bytes after tail. */ 857 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 858 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 859 860 odev->rx_buf_missing -= temp_bytes; 861 count -= temp_bytes; 862 buffer_offset += temp_bytes; 863 odev->rx_buf_size += temp_bytes; 864 if (!odev->rx_buf_missing) { 865 /* Packet is complete. Inject into stack. */ 866 /* We have IP packet here */ 867 odev->skb_rx_buf->protocol = 868 __constant_htons(ETH_P_IP); 869 /* don't check it */ 870 odev->skb_rx_buf->ip_summed = 871 CHECKSUM_UNNECESSARY; 872 873 skb_reset_mac_header(odev->skb_rx_buf); 874 875 /* Ship it off to the kernel */ 876 netif_rx(odev->skb_rx_buf); 877 /* No longer our buffer. */ 878 odev->skb_rx_buf = NULL; 879 880 /* update out statistics */ 881 odev->net->stats.rx_packets++; 882 883 odev->net->stats.rx_bytes += odev->rx_buf_size; 884 885 odev->rx_buf_size = 0; 886 odev->rx_buf_missing = sizeof(struct iphdr); 887 odev->rx_parse_state = WAIT_IP; 888 } 889 break; 890 891 case WAIT_SYNC: 892 D1(" W_S"); 893 count = 0; 894 break; 895 default: 896 D1(" "); 897 count--; 898 break; 899 } 900 } 901 902 /* Recovery mechanism for WAIT_SYNC state. */ 903 if (is_eop) { 904 if (odev->rx_parse_state == WAIT_SYNC) { 905 odev->rx_parse_state = WAIT_IP; 906 odev->rx_buf_size = 0; 907 odev->rx_buf_missing = sizeof(struct iphdr); 908 } 909 } 910} 911 912/* Moving data from usb to kernel (in interrupt state) */ 913static void read_bulk_callback(struct urb *urb) 914{ 915 struct hso_net *odev = urb->context; 916 struct net_device *net; 917 int result; 918 int status = urb->status; 919 920 /* is al ok? (Filip: Who's Al ?) */ 921 if (status) { 922 log_usb_status(status, __func__); 923 return; 924 } 925 926 /* Sanity check */ 927 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 928 D1("BULK IN callback but driver is not active!"); 929 return; 930 } 931 usb_mark_last_busy(urb->dev); 932 933 net = odev->net; 934 935 if (!netif_device_present(net)) { 936 /* Somebody killed our network interface... */ 937 return; 938 } 939 940 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 941 u32 rest; 942 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 943 rest = urb->actual_length % odev->in_endp->wMaxPacketSize; 944 if (((rest == 5) || (rest == 6)) 945 && !memcmp(((u8 *) urb->transfer_buffer) + 946 urb->actual_length - 4, crc_check, 4)) { 947 urb->actual_length -= 4; 948 } 949 } 950 951 /* do we even have a packet? */ 952 if (urb->actual_length) { 953 /* Handle the IP stream, add header and push it onto network 954 * stack if the packet is complete. */ 955 spin_lock(&odev->net_lock); 956 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 957 (urb->transfer_buffer_length > 958 urb->actual_length) ? 1 : 0); 959 spin_unlock(&odev->net_lock); 960 } 961 962 /* We are done with this URB, resubmit it. Prep the USB to wait for 963 * another frame. Reuse same as received. */ 964 usb_fill_bulk_urb(urb, 965 odev->parent->usb, 966 usb_rcvbulkpipe(odev->parent->usb, 967 odev->in_endp-> 968 bEndpointAddress & 0x7F), 969 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 970 read_bulk_callback, odev); 971 972 /* Give this to the USB subsystem so it can tell us when more data 973 * arrives. */ 974 result = usb_submit_urb(urb, GFP_ATOMIC); 975 if (result) 976 dev_warn(&odev->parent->interface->dev, 977 "%s failed submit mux_bulk_rx_urb %d", __func__, 978 result); 979} 980 981/* Serial driver functions */ 982 983static void _hso_serial_set_termios(struct tty_struct *tty, 984 struct ktermios *old) 985{ 986 struct hso_serial *serial = get_serial_by_tty(tty); 987 struct ktermios *termios; 988 989 if ((!tty) || (!tty->termios) || (!serial)) { 990 printk(KERN_ERR "%s: no tty structures", __func__); 991 return; 992 } 993 994 D4("port %d", serial->minor); 995 996 /* 997 * The default requirements for this device are: 998 */ 999 termios = tty->termios; 1000 termios->c_iflag &= 1001 ~(IGNBRK /* disable ignore break */ 1002 | BRKINT /* disable break causes interrupt */ 1003 | PARMRK /* disable mark parity errors */ 1004 | ISTRIP /* disable clear high bit of input characters */ 1005 | INLCR /* disable translate NL to CR */ 1006 | IGNCR /* disable ignore CR */ 1007 | ICRNL /* disable translate CR to NL */ 1008 | IXON); /* disable enable XON/XOFF flow control */ 1009 1010 /* disable postprocess output characters */ 1011 termios->c_oflag &= ~OPOST; 1012 1013 termios->c_lflag &= 1014 ~(ECHO /* disable echo input characters */ 1015 | ECHONL /* disable echo new line */ 1016 | ICANON /* disable erase, kill, werase, and rprnt 1017 special characters */ 1018 | ISIG /* disable interrupt, quit, and suspend special 1019 characters */ 1020 | IEXTEN); /* disable non-POSIX special characters */ 1021 1022 termios->c_cflag &= 1023 ~(CSIZE /* no size */ 1024 | PARENB /* disable parity bit */ 1025 | CBAUD /* clear current baud rate */ 1026 | CBAUDEX); /* clear current buad rate */ 1027 1028 termios->c_cflag |= CS8; /* character size 8 bits */ 1029 1030 /* baud rate 115200 */ 1031 tty_encode_baud_rate(serial->tty, 115200, 115200); 1032 1033 /* 1034 * Force low_latency on; otherwise the pushes are scheduled; 1035 * this is bad as it opens up the possibility of dropping bytes 1036 * on the floor. We don't want to drop bytes on the floor. :) 1037 */ 1038 serial->tty->low_latency = 1; 1039 return; 1040} 1041 1042/* open the requested serial port */ 1043static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1044{ 1045 struct hso_serial *serial = get_serial_by_index(tty->index); 1046 int result; 1047 1048 /* sanity check */ 1049 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1050 tty->driver_data = NULL; 1051 D1("Failed to open port"); 1052 return -ENODEV; 1053 } 1054 1055 mutex_lock(&serial->parent->mutex); 1056 result = usb_autopm_get_interface(serial->parent->interface); 1057 if (result < 0) 1058 goto err_out; 1059 1060 D1("Opening %d", serial->minor); 1061 kref_get(&serial->parent->ref); 1062 1063 /* setup */ 1064 tty->driver_data = serial; 1065 serial->tty = tty; 1066 1067 /* check for port allready opened, if not set the termios */ 1068 serial->open_count++; 1069 if (serial->open_count == 1) { 1070 tty->low_latency = 1; 1071 serial->flags = 0; 1072 /* Force default termio settings */ 1073 _hso_serial_set_termios(tty, NULL); 1074 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1075 if (result) { 1076 hso_stop_serial_device(serial->parent); 1077 serial->open_count--; 1078 kref_put(&serial->parent->ref, hso_serial_ref_free); 1079 } 1080 } else { 1081 D1("Port was already open"); 1082 } 1083 1084 usb_autopm_put_interface(serial->parent->interface); 1085 1086 /* done */ 1087 if (result) 1088 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1089err_out: 1090 mutex_unlock(&serial->parent->mutex); 1091 return result; 1092} 1093 1094/* close the requested serial port */ 1095static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1096{ 1097 struct hso_serial *serial = tty->driver_data; 1098 u8 usb_gone; 1099 1100 D1("Closing serial port"); 1101 1102 mutex_lock(&serial->parent->mutex); 1103 usb_gone = serial->parent->usb_gone; 1104 1105 if (!usb_gone) 1106 usb_autopm_get_interface(serial->parent->interface); 1107 1108 /* reset the rts and dtr */ 1109 /* do the actual close */ 1110 serial->open_count--; 1111 kref_put(&serial->parent->ref, hso_serial_ref_free); 1112 if (serial->open_count <= 0) { 1113 serial->open_count = 0; 1114 if (serial->tty) { 1115 serial->tty->driver_data = NULL; 1116 serial->tty = NULL; 1117 } 1118 if (!usb_gone) 1119 hso_stop_serial_device(serial->parent); 1120 } 1121 if (!usb_gone) 1122 usb_autopm_put_interface(serial->parent->interface); 1123 mutex_unlock(&serial->parent->mutex); 1124} 1125 1126/* close the requested serial port */ 1127static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1128 int count) 1129{ 1130 struct hso_serial *serial = get_serial_by_tty(tty); 1131 int space, tx_bytes; 1132 unsigned long flags; 1133 1134 /* sanity check */ 1135 if (serial == NULL) { 1136 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1137 return -ENODEV; 1138 } 1139 1140 spin_lock_irqsave(&serial->serial_lock, flags); 1141 1142 space = serial->tx_data_length - serial->tx_buffer_count; 1143 tx_bytes = (count < space) ? count : space; 1144 1145 if (!tx_bytes) 1146 goto out; 1147 1148 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1149 serial->tx_buffer_count += tx_bytes; 1150 1151out: 1152 spin_unlock_irqrestore(&serial->serial_lock, flags); 1153 1154 hso_kick_transmit(serial); 1155 /* done */ 1156 return tx_bytes; 1157} 1158 1159/* how much room is there for writing */ 1160static int hso_serial_write_room(struct tty_struct *tty) 1161{ 1162 struct hso_serial *serial = get_serial_by_tty(tty); 1163 int room; 1164 unsigned long flags; 1165 1166 spin_lock_irqsave(&serial->serial_lock, flags); 1167 room = serial->tx_data_length - serial->tx_buffer_count; 1168 spin_unlock_irqrestore(&serial->serial_lock, flags); 1169 1170 /* return free room */ 1171 return room; 1172} 1173 1174/* setup the term */ 1175static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1176{ 1177 struct hso_serial *serial = get_serial_by_tty(tty); 1178 unsigned long flags; 1179 1180 if (old) 1181 D5("Termios called with: cflags new[%d] - old[%d]", 1182 tty->termios->c_cflag, old->c_cflag); 1183 1184 /* the actual setup */ 1185 spin_lock_irqsave(&serial->serial_lock, flags); 1186 if (serial->open_count) 1187 _hso_serial_set_termios(tty, old); 1188 else 1189 tty->termios = old; 1190 spin_unlock_irqrestore(&serial->serial_lock, flags); 1191 1192 /* done */ 1193 return; 1194} 1195 1196/* how many characters in the buffer */ 1197static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1198{ 1199 struct hso_serial *serial = get_serial_by_tty(tty); 1200 int chars; 1201 unsigned long flags; 1202 1203 /* sanity check */ 1204 if (serial == NULL) 1205 return 0; 1206 1207 spin_lock_irqsave(&serial->serial_lock, flags); 1208 chars = serial->tx_buffer_count; 1209 spin_unlock_irqrestore(&serial->serial_lock, flags); 1210 1211 return chars; 1212} 1213 1214static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1215{ 1216 unsigned int value; 1217 struct hso_serial *serial = get_serial_by_tty(tty); 1218 unsigned long flags; 1219 1220 /* sanity check */ 1221 if (!serial) { 1222 D1("no tty structures"); 1223 return -EINVAL; 1224 } 1225 1226 spin_lock_irqsave(&serial->serial_lock, flags); 1227 value = ((serial->rts_state) ? TIOCM_RTS : 0) | 1228 ((serial->dtr_state) ? TIOCM_DTR : 0); 1229 spin_unlock_irqrestore(&serial->serial_lock, flags); 1230 1231 return value; 1232} 1233 1234static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1235 unsigned int set, unsigned int clear) 1236{ 1237 int val = 0; 1238 unsigned long flags; 1239 int if_num; 1240 struct hso_serial *serial = get_serial_by_tty(tty); 1241 1242 /* sanity check */ 1243 if (!serial) { 1244 D1("no tty structures"); 1245 return -EINVAL; 1246 } 1247 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1248 1249 spin_lock_irqsave(&serial->serial_lock, flags); 1250 if (set & TIOCM_RTS) 1251 serial->rts_state = 1; 1252 if (set & TIOCM_DTR) 1253 serial->dtr_state = 1; 1254 1255 if (clear & TIOCM_RTS) 1256 serial->rts_state = 0; 1257 if (clear & TIOCM_DTR) 1258 serial->dtr_state = 0; 1259 1260 if (serial->dtr_state) 1261 val |= 0x01; 1262 if (serial->rts_state) 1263 val |= 0x02; 1264 1265 spin_unlock_irqrestore(&serial->serial_lock, flags); 1266 1267 return usb_control_msg(serial->parent->usb, 1268 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1269 0x21, val, if_num, NULL, 0, 1270 USB_CTRL_SET_TIMEOUT); 1271} 1272 1273/* starts a transmit */ 1274static void hso_kick_transmit(struct hso_serial *serial) 1275{ 1276 u8 *temp; 1277 unsigned long flags; 1278 int res; 1279 1280 spin_lock_irqsave(&serial->serial_lock, flags); 1281 if (!serial->tx_buffer_count) 1282 goto out; 1283 1284 if (serial->tx_urb_used) 1285 goto out; 1286 1287 /* Wakeup USB interface if necessary */ 1288 if (hso_get_activity(serial->parent) == -EAGAIN) 1289 goto out; 1290 1291 /* Switch pointers around to avoid memcpy */ 1292 temp = serial->tx_buffer; 1293 serial->tx_buffer = serial->tx_data; 1294 serial->tx_data = temp; 1295 serial->tx_data_count = serial->tx_buffer_count; 1296 serial->tx_buffer_count = 0; 1297 1298 /* If temp is set, it means we switched buffers */ 1299 if (temp && serial->write_data) { 1300 res = serial->write_data(serial); 1301 if (res >= 0) 1302 serial->tx_urb_used = 1; 1303 } 1304out: 1305 spin_unlock_irqrestore(&serial->serial_lock, flags); 1306} 1307 1308/* make a request (for reading and writing data to muxed serial port) */ 1309static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1310 struct urb *ctrl_urb, 1311 struct usb_ctrlrequest *ctrl_req, 1312 u8 *ctrl_urb_data, u32 size) 1313{ 1314 int result; 1315 int pipe; 1316 1317 /* Sanity check */ 1318 if (!serial || !ctrl_urb || !ctrl_req) { 1319 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1320 return -EINVAL; 1321 } 1322 1323 /* initialize */ 1324 ctrl_req->wValue = 0; 1325 ctrl_req->wIndex = hso_port_to_mux(port); 1326 ctrl_req->wLength = size; 1327 1328 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1329 /* Reading command */ 1330 ctrl_req->bRequestType = USB_DIR_IN | 1331 USB_TYPE_OPTION_VENDOR | 1332 USB_RECIP_INTERFACE; 1333 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1334 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1335 } else { 1336 /* Writing command */ 1337 ctrl_req->bRequestType = USB_DIR_OUT | 1338 USB_TYPE_OPTION_VENDOR | 1339 USB_RECIP_INTERFACE; 1340 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1341 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1342 } 1343 /* syslog */ 1344 D2("%s command (%02x) len: %d, port: %d", 1345 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1346 ctrl_req->bRequestType, ctrl_req->wLength, port); 1347 1348 /* Load ctrl urb */ 1349 ctrl_urb->transfer_flags = 0; 1350 usb_fill_control_urb(ctrl_urb, 1351 serial->parent->usb, 1352 pipe, 1353 (u8 *) ctrl_req, 1354 ctrl_urb_data, size, ctrl_callback, serial); 1355 /* Send it on merry way */ 1356 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1357 if (result) { 1358 dev_err(&ctrl_urb->dev->dev, 1359 "%s failed submit ctrl_urb %d type %d", __func__, 1360 result, type); 1361 return result; 1362 } 1363 1364 /* done */ 1365 return size; 1366} 1367 1368/* called by intr_callback when read occurs */ 1369static int hso_mux_serial_read(struct hso_serial *serial) 1370{ 1371 if (!serial) 1372 return -EINVAL; 1373 1374 /* clean data */ 1375 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1376 /* make the request */ 1377 1378 if (serial->num_rx_urbs != 1) { 1379 dev_err(&serial->parent->interface->dev, 1380 "ERROR: mux'd reads with multiple buffers " 1381 "not possible\n"); 1382 return 0; 1383 } 1384 return mux_device_request(serial, 1385 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1386 serial->parent->port_spec & HSO_PORT_MASK, 1387 serial->rx_urb[0], 1388 &serial->ctrl_req_rx, 1389 serial->rx_data[0], serial->rx_data_length); 1390} 1391 1392/* used for muxed serial port callback (muxed serial read) */ 1393static void intr_callback(struct urb *urb) 1394{ 1395 struct hso_shared_int *shared_int = urb->context; 1396 struct hso_serial *serial; 1397 unsigned char *port_req; 1398 int status = urb->status; 1399 int i; 1400 1401 usb_mark_last_busy(urb->dev); 1402 1403 /* sanity check */ 1404 if (!shared_int) 1405 return; 1406 1407 /* status check */ 1408 if (status) { 1409 log_usb_status(status, __func__); 1410 return; 1411 } 1412 D4("\n--- Got intr callback 0x%02X ---", status); 1413 1414 /* what request? */ 1415 port_req = urb->transfer_buffer; 1416 D4(" port_req = 0x%.2X\n", *port_req); 1417 /* loop over all muxed ports to find the one sending this */ 1418 for (i = 0; i < 8; i++) { 1419 /* max 8 channels on MUX */ 1420 if (*port_req & (1 << i)) { 1421 serial = get_serial_by_shared_int_and_type(shared_int, 1422 (1 << i)); 1423 if (serial != NULL) { 1424 D1("Pending read interrupt on port %d\n", i); 1425 if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT, 1426 &serial->flags)) { 1427 /* Setup and send a ctrl req read on 1428 * port i */ 1429 hso_mux_serial_read(serial); 1430 } else { 1431 D1("Already pending a read on " 1432 "port %d\n", i); 1433 } 1434 } 1435 } 1436 } 1437 /* Resubmit interrupt urb */ 1438 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1439} 1440 1441/* called for writing to muxed serial port */ 1442static int hso_mux_serial_write_data(struct hso_serial *serial) 1443{ 1444 if (NULL == serial) 1445 return -EINVAL; 1446 1447 return mux_device_request(serial, 1448 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1449 serial->parent->port_spec & HSO_PORT_MASK, 1450 serial->tx_urb, 1451 &serial->ctrl_req_tx, 1452 serial->tx_data, serial->tx_data_count); 1453} 1454 1455/* write callback for Diag and CS port */ 1456static void hso_std_serial_write_bulk_callback(struct urb *urb) 1457{ 1458 struct hso_serial *serial = urb->context; 1459 int status = urb->status; 1460 1461 /* sanity check */ 1462 if (!serial) { 1463 D1("serial == NULL"); 1464 return; 1465 } 1466 1467 spin_lock(&serial->serial_lock); 1468 serial->tx_urb_used = 0; 1469 spin_unlock(&serial->serial_lock); 1470 if (status) { 1471 log_usb_status(status, __func__); 1472 return; 1473 } 1474 hso_put_activity(serial->parent); 1475 if (serial->tty) 1476 tty_wakeup(serial->tty); 1477 hso_kick_transmit(serial); 1478 1479 D1(" "); 1480 return; 1481} 1482 1483/* called for writing diag or CS serial port */ 1484static int hso_std_serial_write_data(struct hso_serial *serial) 1485{ 1486 int count = serial->tx_data_count; 1487 int result; 1488 1489 usb_fill_bulk_urb(serial->tx_urb, 1490 serial->parent->usb, 1491 usb_sndbulkpipe(serial->parent->usb, 1492 serial->out_endp-> 1493 bEndpointAddress & 0x7F), 1494 serial->tx_data, serial->tx_data_count, 1495 hso_std_serial_write_bulk_callback, serial); 1496 1497 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1498 if (result) { 1499 dev_warn(&serial->parent->usb->dev, 1500 "Failed to submit urb - res %d\n", result); 1501 return result; 1502 } 1503 1504 return count; 1505} 1506 1507/* callback after read or write on muxed serial port */ 1508static void ctrl_callback(struct urb *urb) 1509{ 1510 struct hso_serial *serial = urb->context; 1511 struct usb_ctrlrequest *req; 1512 int status = urb->status; 1513 1514 /* sanity check */ 1515 if (!serial) 1516 return; 1517 1518 spin_lock(&serial->serial_lock); 1519 serial->tx_urb_used = 0; 1520 spin_unlock(&serial->serial_lock); 1521 if (status) { 1522 log_usb_status(status, __func__); 1523 return; 1524 } 1525 1526 /* what request? */ 1527 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1528 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1529 D4("Actual length of urb = %d\n", urb->actual_length); 1530 DUMP1(urb->transfer_buffer, urb->actual_length); 1531 1532 if (req->bRequestType == 1533 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1534 /* response to a read command */ 1535 if (serial->open_count > 0) { 1536 /* handle RX data the normal way */ 1537 put_rxbuf_data(urb, serial); 1538 } 1539 1540 /* Re issue a read as long as we receive data. */ 1541 if (urb->actual_length != 0) 1542 hso_mux_serial_read(serial); 1543 else 1544 clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags); 1545 } else { 1546 hso_put_activity(serial->parent); 1547 if (serial->tty) 1548 tty_wakeup(serial->tty); 1549 /* response to a write command */ 1550 hso_kick_transmit(serial); 1551 } 1552} 1553 1554/* handle RX data for serial port */ 1555static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 1556{ 1557 struct tty_struct *tty = serial->tty; 1558 1559 /* Sanity check */ 1560 if (urb == NULL || serial == NULL) { 1561 D1("serial = NULL"); 1562 return; 1563 } 1564 1565 /* Push data to tty */ 1566 if (tty && urb->actual_length) { 1567 D1("data to push to tty"); 1568 tty_insert_flip_string(tty, urb->transfer_buffer, 1569 urb->actual_length); 1570 tty_flip_buffer_push(tty); 1571 } 1572} 1573 1574/* read callback for Diag and CS port */ 1575static void hso_std_serial_read_bulk_callback(struct urb *urb) 1576{ 1577 struct hso_serial *serial = urb->context; 1578 int result; 1579 int status = urb->status; 1580 1581 /* sanity check */ 1582 if (!serial) { 1583 D1("serial == NULL"); 1584 return; 1585 } else if (status) { 1586 log_usb_status(status, __func__); 1587 return; 1588 } 1589 1590 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1591 D1("Actual length = %d\n", urb->actual_length); 1592 DUMP1(urb->transfer_buffer, urb->actual_length); 1593 1594 /* Anyone listening? */ 1595 if (serial->open_count == 0) 1596 return; 1597 1598 if (status == 0) { 1599 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1600 u32 rest; 1601 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1602 rest = 1603 urb->actual_length % 1604 serial->in_endp->wMaxPacketSize; 1605 if (((rest == 5) || (rest == 6)) 1606 && !memcmp(((u8 *) urb->transfer_buffer) + 1607 urb->actual_length - 4, crc_check, 4)) { 1608 urb->actual_length -= 4; 1609 } 1610 } 1611 /* Valid data, handle RX data */ 1612 put_rxbuf_data(urb, serial); 1613 } else if (status == -ENOENT || status == -ECONNRESET) { 1614 /* Unlinked - check for throttled port. */ 1615 D2("Port %d, successfully unlinked urb", serial->minor); 1616 } else { 1617 D2("Port %d, status = %d for read urb", serial->minor, status); 1618 return; 1619 } 1620 1621 usb_mark_last_busy(urb->dev); 1622 1623 /* We are done with this URB, resubmit it. Prep the USB to wait for 1624 * another frame */ 1625 usb_fill_bulk_urb(urb, serial->parent->usb, 1626 usb_rcvbulkpipe(serial->parent->usb, 1627 serial->in_endp-> 1628 bEndpointAddress & 0x7F), 1629 urb->transfer_buffer, serial->rx_data_length, 1630 hso_std_serial_read_bulk_callback, serial); 1631 /* Give this to the USB subsystem so it can tell us when more data 1632 * arrives. */ 1633 result = usb_submit_urb(urb, GFP_ATOMIC); 1634 if (result) { 1635 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d", 1636 __func__, result); 1637 } 1638} 1639 1640/* Base driver functions */ 1641 1642static void hso_log_port(struct hso_device *hso_dev) 1643{ 1644 char *port_type; 1645 char port_dev[20]; 1646 1647 switch (hso_dev->port_spec & HSO_PORT_MASK) { 1648 case HSO_PORT_CONTROL: 1649 port_type = "Control"; 1650 break; 1651 case HSO_PORT_APP: 1652 port_type = "Application"; 1653 break; 1654 case HSO_PORT_GPS: 1655 port_type = "GPS"; 1656 break; 1657 case HSO_PORT_GPS_CONTROL: 1658 port_type = "GPS control"; 1659 break; 1660 case HSO_PORT_APP2: 1661 port_type = "Application2"; 1662 break; 1663 case HSO_PORT_PCSC: 1664 port_type = "PCSC"; 1665 break; 1666 case HSO_PORT_DIAG: 1667 port_type = "Diagnostic"; 1668 break; 1669 case HSO_PORT_DIAG2: 1670 port_type = "Diagnostic2"; 1671 break; 1672 case HSO_PORT_MODEM: 1673 port_type = "Modem"; 1674 break; 1675 case HSO_PORT_NETWORK: 1676 port_type = "Network"; 1677 break; 1678 default: 1679 port_type = "Unknown"; 1680 break; 1681 } 1682 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 1683 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 1684 } else 1685 sprintf(port_dev, "/dev/%s%d", tty_filename, 1686 dev2ser(hso_dev)->minor); 1687 1688 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 1689 port_type, port_dev); 1690} 1691 1692static int hso_start_net_device(struct hso_device *hso_dev) 1693{ 1694 int i, result = 0; 1695 struct hso_net *hso_net = dev2net(hso_dev); 1696 1697 if (!hso_net) 1698 return -ENODEV; 1699 1700 /* send URBs for all read buffers */ 1701 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 1702 1703 /* Prep a receive URB */ 1704 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 1705 hso_dev->usb, 1706 usb_rcvbulkpipe(hso_dev->usb, 1707 hso_net->in_endp-> 1708 bEndpointAddress & 0x7F), 1709 hso_net->mux_bulk_rx_buf_pool[i], 1710 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 1711 hso_net); 1712 1713 /* Put it out there so the device can send us stuff */ 1714 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 1715 GFP_NOIO); 1716 if (result) 1717 dev_warn(&hso_dev->usb->dev, 1718 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 1719 i, result); 1720 } 1721 1722 return result; 1723} 1724 1725static int hso_stop_net_device(struct hso_device *hso_dev) 1726{ 1727 int i; 1728 struct hso_net *hso_net = dev2net(hso_dev); 1729 1730 if (!hso_net) 1731 return -ENODEV; 1732 1733 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 1734 if (hso_net->mux_bulk_rx_urb_pool[i]) 1735 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 1736 1737 } 1738 if (hso_net->mux_bulk_tx_urb) 1739 usb_kill_urb(hso_net->mux_bulk_tx_urb); 1740 1741 return 0; 1742} 1743 1744static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 1745{ 1746 int i, result = 0; 1747 struct hso_serial *serial = dev2ser(hso_dev); 1748 1749 if (!serial) 1750 return -ENODEV; 1751 1752 /* If it is not the MUX port fill in and submit a bulk urb (already 1753 * allocated in hso_serial_start) */ 1754 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 1755 for (i = 0; i < serial->num_rx_urbs; i++) { 1756 usb_fill_bulk_urb(serial->rx_urb[i], 1757 serial->parent->usb, 1758 usb_rcvbulkpipe(serial->parent->usb, 1759 serial->in_endp-> 1760 bEndpointAddress & 1761 0x7F), 1762 serial->rx_data[i], 1763 serial->rx_data_length, 1764 hso_std_serial_read_bulk_callback, 1765 serial); 1766 result = usb_submit_urb(serial->rx_urb[i], flags); 1767 if (result) { 1768 dev_warn(&serial->parent->usb->dev, 1769 "Failed to submit urb - res %d\n", 1770 result); 1771 break; 1772 } 1773 } 1774 } else { 1775 mutex_lock(&serial->shared_int->shared_int_lock); 1776 if (!serial->shared_int->use_count) { 1777 result = 1778 hso_mux_submit_intr_urb(serial->shared_int, 1779 hso_dev->usb, flags); 1780 } 1781 serial->shared_int->use_count++; 1782 mutex_unlock(&serial->shared_int->shared_int_lock); 1783 } 1784 1785 return result; 1786} 1787 1788static int hso_stop_serial_device(struct hso_device *hso_dev) 1789{ 1790 int i; 1791 struct hso_serial *serial = dev2ser(hso_dev); 1792 1793 if (!serial) 1794 return -ENODEV; 1795 1796 for (i = 0; i < serial->num_rx_urbs; i++) { 1797 if (serial->rx_urb[i]) 1798 usb_kill_urb(serial->rx_urb[i]); 1799 } 1800 1801 if (serial->tx_urb) 1802 usb_kill_urb(serial->tx_urb); 1803 1804 if (serial->shared_int) { 1805 mutex_lock(&serial->shared_int->shared_int_lock); 1806 if (serial->shared_int->use_count && 1807 (--serial->shared_int->use_count == 0)) { 1808 struct urb *urb; 1809 1810 urb = serial->shared_int->shared_intr_urb; 1811 if (urb) 1812 usb_kill_urb(urb); 1813 } 1814 mutex_unlock(&serial->shared_int->shared_int_lock); 1815 } 1816 1817 return 0; 1818} 1819 1820static void hso_serial_common_free(struct hso_serial *serial) 1821{ 1822 int i; 1823 1824 if (serial->parent->dev) 1825 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 1826 1827 tty_unregister_device(tty_drv, serial->minor); 1828 1829 for (i = 0; i < serial->num_rx_urbs; i++) { 1830 /* unlink and free RX URB */ 1831 usb_free_urb(serial->rx_urb[i]); 1832 /* free the RX buffer */ 1833 kfree(serial->rx_data[i]); 1834 } 1835 1836 /* unlink and free TX URB */ 1837 usb_free_urb(serial->tx_urb); 1838 kfree(serial->tx_data); 1839} 1840 1841static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 1842 int rx_size, int tx_size) 1843{ 1844 struct device *dev; 1845 int minor; 1846 int i; 1847 1848 minor = get_free_serial_index(); 1849 if (minor < 0) 1850 goto exit; 1851 1852 /* register our minor number */ 1853 serial->parent->dev = tty_register_device(tty_drv, minor, 1854 &serial->parent->interface->dev); 1855 dev = serial->parent->dev; 1856 dev->driver_data = serial->parent; 1857 i = device_create_file(dev, &dev_attr_hsotype); 1858 1859 /* fill in specific data for later use */ 1860 serial->minor = minor; 1861 serial->magic = HSO_SERIAL_MAGIC; 1862 spin_lock_init(&serial->serial_lock); 1863 serial->num_rx_urbs = num_urbs; 1864 1865 /* RX, allocate urb and initialize */ 1866 1867 /* prepare our RX buffer */ 1868 serial->rx_data_length = rx_size; 1869 for (i = 0; i < serial->num_rx_urbs; i++) { 1870 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 1871 if (!serial->rx_urb[i]) { 1872 dev_err(dev, "Could not allocate urb?\n"); 1873 goto exit; 1874 } 1875 serial->rx_urb[i]->transfer_buffer = NULL; 1876 serial->rx_urb[i]->transfer_buffer_length = 0; 1877 serial->rx_data[i] = kzalloc(serial->rx_data_length, 1878 GFP_KERNEL); 1879 if (!serial->rx_data[i]) { 1880 dev_err(dev, "%s - Out of memory\n", __func__); 1881 goto exit; 1882 } 1883 } 1884 1885 /* TX, allocate urb and initialize */ 1886 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1887 if (!serial->tx_urb) { 1888 dev_err(dev, "Could not allocate urb?\n"); 1889 goto exit; 1890 } 1891 serial->tx_urb->transfer_buffer = NULL; 1892 serial->tx_urb->transfer_buffer_length = 0; 1893 /* prepare our TX buffer */ 1894 serial->tx_data_count = 0; 1895 serial->tx_buffer_count = 0; 1896 serial->tx_data_length = tx_size; 1897 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 1898 if (!serial->tx_data) { 1899 dev_err(dev, "%s - Out of memory", __func__); 1900 goto exit; 1901 } 1902 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 1903 if (!serial->tx_buffer) { 1904 dev_err(dev, "%s - Out of memory", __func__); 1905 goto exit; 1906 } 1907 1908 return 0; 1909exit: 1910 hso_serial_common_free(serial); 1911 return -1; 1912} 1913 1914/* Frees a general hso device */ 1915static void hso_free_device(struct hso_device *hso_dev) 1916{ 1917 kfree(hso_dev); 1918} 1919 1920/* Creates a general hso device */ 1921static struct hso_device *hso_create_device(struct usb_interface *intf, 1922 int port_spec) 1923{ 1924 struct hso_device *hso_dev; 1925 1926 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 1927 if (!hso_dev) 1928 return NULL; 1929 1930 hso_dev->port_spec = port_spec; 1931 hso_dev->usb = interface_to_usbdev(intf); 1932 hso_dev->interface = intf; 1933 kref_init(&hso_dev->ref); 1934 mutex_init(&hso_dev->mutex); 1935 1936 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 1937 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 1938 1939 return hso_dev; 1940} 1941 1942/* Removes a network device in the network device table */ 1943static int remove_net_device(struct hso_device *hso_dev) 1944{ 1945 int i; 1946 1947 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 1948 if (network_table[i] == hso_dev) { 1949 network_table[i] = NULL; 1950 break; 1951 } 1952 } 1953 if (i == HSO_MAX_NET_DEVICES) 1954 return -1; 1955 return 0; 1956} 1957 1958/* Frees our network device */ 1959static void hso_free_net_device(struct hso_device *hso_dev) 1960{ 1961 int i; 1962 struct hso_net *hso_net = dev2net(hso_dev); 1963 1964 if (!hso_net) 1965 return; 1966 1967 /* start freeing */ 1968 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 1969 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 1970 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 1971 } 1972 usb_free_urb(hso_net->mux_bulk_tx_urb); 1973 kfree(hso_net->mux_bulk_tx_buf); 1974 1975 remove_net_device(hso_net->parent); 1976 1977 if (hso_net->net) { 1978 unregister_netdev(hso_net->net); 1979 free_netdev(hso_net->net); 1980 } 1981 1982 hso_free_device(hso_dev); 1983} 1984 1985/* initialize the network interface */ 1986static void hso_net_init(struct net_device *net) 1987{ 1988 struct hso_net *hso_net = netdev_priv(net); 1989 1990 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 1991 1992 /* fill in the other fields */ 1993 net->open = hso_net_open; 1994 net->stop = hso_net_close; 1995 net->hard_start_xmit = hso_net_start_xmit; 1996 net->tx_timeout = hso_net_tx_timeout; 1997 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 1998 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 1999 net->type = ARPHRD_NONE; 2000 net->mtu = DEFAULT_MTU - 14; 2001 net->tx_queue_len = 10; 2002 SET_ETHTOOL_OPS(net, &ops); 2003 2004 /* and initialize the semaphore */ 2005 spin_lock_init(&hso_net->net_lock); 2006} 2007 2008/* Adds a network device in the network device table */ 2009static int add_net_device(struct hso_device *hso_dev) 2010{ 2011 int i; 2012 2013 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2014 if (network_table[i] == NULL) { 2015 network_table[i] = hso_dev; 2016 break; 2017 } 2018 } 2019 if (i == HSO_MAX_NET_DEVICES) 2020 return -1; 2021 return 0; 2022} 2023 2024static int hso_radio_toggle(void *data, enum rfkill_state state) 2025{ 2026 struct hso_device *hso_dev = data; 2027 int enabled = (state == RFKILL_STATE_ON); 2028 int rv; 2029 2030 mutex_lock(&hso_dev->mutex); 2031 if (hso_dev->usb_gone) 2032 rv = 0; 2033 else 2034 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2035 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2036 USB_CTRL_SET_TIMEOUT); 2037 mutex_unlock(&hso_dev->mutex); 2038 return rv; 2039} 2040 2041/* Creates and sets up everything for rfkill */ 2042static void hso_create_rfkill(struct hso_device *hso_dev, 2043 struct usb_interface *interface) 2044{ 2045 struct hso_net *hso_net = dev2net(hso_dev); 2046 struct device *dev = hso_dev->dev; 2047 char *rfkn; 2048 2049 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, 2050 RFKILL_TYPE_WLAN); 2051 if (!hso_net->rfkill) { 2052 dev_err(dev, "%s - Out of memory", __func__); 2053 return; 2054 } 2055 rfkn = kzalloc(20, GFP_KERNEL); 2056 if (!rfkn) { 2057 rfkill_free(hso_net->rfkill); 2058 dev_err(dev, "%s - Out of memory", __func__); 2059 return; 2060 } 2061 snprintf(rfkn, 20, "hso-%d", 2062 interface->altsetting->desc.bInterfaceNumber); 2063 hso_net->rfkill->name = rfkn; 2064 hso_net->rfkill->state = RFKILL_STATE_ON; 2065 hso_net->rfkill->data = hso_dev; 2066 hso_net->rfkill->toggle_radio = hso_radio_toggle; 2067 if (rfkill_register(hso_net->rfkill) < 0) { 2068 kfree(rfkn); 2069 hso_net->rfkill->name = NULL; 2070 rfkill_free(hso_net->rfkill); 2071 dev_err(dev, "%s - Failed to register rfkill", __func__); 2072 return; 2073 } 2074} 2075 2076/* Creates our network device */ 2077static struct hso_device *hso_create_net_device(struct usb_interface *interface) 2078{ 2079 int result, i; 2080 struct net_device *net; 2081 struct hso_net *hso_net; 2082 struct hso_device *hso_dev; 2083 2084 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK); 2085 if (!hso_dev) 2086 return NULL; 2087 2088 /* allocate our network device, then we can put in our private data */ 2089 /* call hso_net_init to do the basic initialization */ 2090 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2091 if (!net) { 2092 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2093 goto exit; 2094 } 2095 2096 hso_net = netdev_priv(net); 2097 2098 hso_dev->port_data.dev_net = hso_net; 2099 hso_net->net = net; 2100 hso_net->parent = hso_dev; 2101 2102 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2103 USB_DIR_IN); 2104 if (!hso_net->in_endp) { 2105 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2106 goto exit; 2107 } 2108 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2109 USB_DIR_OUT); 2110 if (!hso_net->out_endp) { 2111 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2112 goto exit; 2113 } 2114 SET_NETDEV_DEV(net, &interface->dev); 2115 2116 /* registering our net device */ 2117 result = register_netdev(net); 2118 if (result) { 2119 dev_err(&interface->dev, "Failed to register device\n"); 2120 goto exit; 2121 } 2122 2123 /* start allocating */ 2124 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2125 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2126 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2127 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2128 goto exit; 2129 } 2130 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2131 GFP_KERNEL); 2132 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2133 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2134 goto exit; 2135 } 2136 } 2137 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2138 if (!hso_net->mux_bulk_tx_urb) { 2139 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2140 goto exit; 2141 } 2142 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2143 if (!hso_net->mux_bulk_tx_buf) { 2144 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2145 goto exit; 2146 } 2147 2148 add_net_device(hso_dev); 2149 2150 hso_log_port(hso_dev); 2151 2152 hso_create_rfkill(hso_dev, interface); 2153 2154 return hso_dev; 2155exit: 2156 hso_free_net_device(hso_dev); 2157 return NULL; 2158} 2159 2160/* Frees an AT channel ( goes for both mux and non-mux ) */ 2161static void hso_free_serial_device(struct hso_device *hso_dev) 2162{ 2163 struct hso_serial *serial = dev2ser(hso_dev); 2164 2165 if (!serial) 2166 return; 2167 set_serial_by_index(serial->minor, NULL); 2168 2169 hso_serial_common_free(serial); 2170 2171 if (serial->shared_int) { 2172 mutex_lock(&serial->shared_int->shared_int_lock); 2173 if (--serial->shared_int->ref_count == 0) 2174 hso_free_shared_int(serial->shared_int); 2175 else 2176 mutex_unlock(&serial->shared_int->shared_int_lock); 2177 } 2178 kfree(serial); 2179 hso_free_device(hso_dev); 2180} 2181 2182/* Creates a bulk AT channel */ 2183static struct hso_device *hso_create_bulk_serial_device( 2184 struct usb_interface *interface, int port) 2185{ 2186 struct hso_device *hso_dev; 2187 struct hso_serial *serial; 2188 int num_urbs; 2189 2190 hso_dev = hso_create_device(interface, port); 2191 if (!hso_dev) 2192 return NULL; 2193 2194 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2195 if (!serial) 2196 goto exit; 2197 2198 serial->parent = hso_dev; 2199 hso_dev->port_data.dev_serial = serial; 2200 2201 if (port & HSO_PORT_MODEM) 2202 num_urbs = 2; 2203 else 2204 num_urbs = 1; 2205 2206 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2207 BULK_URB_TX_SIZE)) 2208 goto exit; 2209 2210 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2211 USB_DIR_IN); 2212 if (!serial->in_endp) { 2213 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2214 goto exit; 2215 } 2216 2217 if (! 2218 (serial->out_endp = 2219 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2220 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2221 goto exit; 2222 } 2223 2224 serial->write_data = hso_std_serial_write_data; 2225 2226 /* and record this serial */ 2227 set_serial_by_index(serial->minor, serial); 2228 2229 /* setup the proc dirs and files if needed */ 2230 hso_log_port(hso_dev); 2231 2232 /* done, return it */ 2233 return hso_dev; 2234exit: 2235 if (hso_dev && serial) 2236 hso_serial_common_free(serial); 2237 kfree(serial); 2238 hso_free_device(hso_dev); 2239 return NULL; 2240} 2241 2242/* Creates a multiplexed AT channel */ 2243static 2244struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2245 int port, 2246 struct hso_shared_int *mux) 2247{ 2248 struct hso_device *hso_dev; 2249 struct hso_serial *serial; 2250 int port_spec; 2251 2252 port_spec = HSO_INTF_MUX; 2253 port_spec &= ~HSO_PORT_MASK; 2254 2255 port_spec |= hso_mux_to_port(port); 2256 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2257 return NULL; 2258 2259 hso_dev = hso_create_device(interface, port_spec); 2260 if (!hso_dev) 2261 return NULL; 2262 2263 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2264 if (!serial) 2265 goto exit; 2266 2267 hso_dev->port_data.dev_serial = serial; 2268 serial->parent = hso_dev; 2269 2270 if (hso_serial_common_create 2271 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2272 goto exit; 2273 2274 serial->tx_data_length--; 2275 serial->write_data = hso_mux_serial_write_data; 2276 2277 serial->shared_int = mux; 2278 mutex_lock(&serial->shared_int->shared_int_lock); 2279 serial->shared_int->ref_count++; 2280 mutex_unlock(&serial->shared_int->shared_int_lock); 2281 2282 /* and record this serial */ 2283 set_serial_by_index(serial->minor, serial); 2284 2285 /* setup the proc dirs and files if needed */ 2286 hso_log_port(hso_dev); 2287 2288 /* done, return it */ 2289 return hso_dev; 2290 2291exit: 2292 if (serial) { 2293 tty_unregister_device(tty_drv, serial->minor); 2294 kfree(serial); 2295 } 2296 if (hso_dev) 2297 hso_free_device(hso_dev); 2298 return NULL; 2299 2300} 2301 2302static void hso_free_shared_int(struct hso_shared_int *mux) 2303{ 2304 usb_free_urb(mux->shared_intr_urb); 2305 kfree(mux->shared_intr_buf); 2306 mutex_unlock(&mux->shared_int_lock); 2307 kfree(mux); 2308} 2309 2310static 2311struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2312{ 2313 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2314 2315 if (!mux) 2316 return NULL; 2317 2318 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2319 USB_DIR_IN); 2320 if (!mux->intr_endp) { 2321 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2322 goto exit; 2323 } 2324 2325 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2326 if (!mux->shared_intr_urb) { 2327 dev_err(&interface->dev, "Could not allocate intr urb?"); 2328 goto exit; 2329 } 2330 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, 2331 GFP_KERNEL); 2332 if (!mux->shared_intr_buf) { 2333 dev_err(&interface->dev, "Could not allocate intr buf?"); 2334 goto exit; 2335 } 2336 2337 mutex_init(&mux->shared_int_lock); 2338 2339 return mux; 2340 2341exit: 2342 kfree(mux->shared_intr_buf); 2343 usb_free_urb(mux->shared_intr_urb); 2344 kfree(mux); 2345 return NULL; 2346} 2347 2348/* Gets the port spec for a certain interface */ 2349static int hso_get_config_data(struct usb_interface *interface) 2350{ 2351 struct usb_device *usbdev = interface_to_usbdev(interface); 2352 u8 config_data[17]; 2353 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2354 s32 result; 2355 2356 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2357 0x86, 0xC0, 0, 0, config_data, 17, 2358 USB_CTRL_SET_TIMEOUT) != 0x11) { 2359 return -EIO; 2360 } 2361 2362 switch (config_data[if_num]) { 2363 case 0x0: 2364 result = 0; 2365 break; 2366 case 0x1: 2367 result = HSO_PORT_DIAG; 2368 break; 2369 case 0x2: 2370 result = HSO_PORT_GPS; 2371 break; 2372 case 0x3: 2373 result = HSO_PORT_GPS_CONTROL; 2374 break; 2375 case 0x4: 2376 result = HSO_PORT_APP; 2377 break; 2378 case 0x5: 2379 result = HSO_PORT_APP2; 2380 break; 2381 case 0x6: 2382 result = HSO_PORT_CONTROL; 2383 break; 2384 case 0x7: 2385 result = HSO_PORT_NETWORK; 2386 break; 2387 case 0x8: 2388 result = HSO_PORT_MODEM; 2389 break; 2390 case 0x9: 2391 result = HSO_PORT_MSD; 2392 break; 2393 case 0xa: 2394 result = HSO_PORT_PCSC; 2395 break; 2396 case 0xb: 2397 result = HSO_PORT_VOICE; 2398 break; 2399 default: 2400 result = 0; 2401 } 2402 2403 if (result) 2404 result |= HSO_INTF_BULK; 2405 2406 if (config_data[16] & 0x1) 2407 result |= HSO_INFO_CRC_BUG; 2408 2409 return result; 2410} 2411 2412/* called once for each interface upon device insertion */ 2413static int hso_probe(struct usb_interface *interface, 2414 const struct usb_device_id *id) 2415{ 2416 int mux, i, if_num, port_spec; 2417 unsigned char port_mask; 2418 struct hso_device *hso_dev = NULL; 2419 struct hso_shared_int *shared_int; 2420 struct hso_device *tmp_dev = NULL; 2421 2422 if_num = interface->altsetting->desc.bInterfaceNumber; 2423 2424 /* Get the interface/port specification from either driver_info or from 2425 * the device itself */ 2426 if (id->driver_info) 2427 port_spec = ((u32 *)(id->driver_info))[if_num]; 2428 else 2429 port_spec = hso_get_config_data(interface); 2430 2431 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2432 dev_err(&interface->dev, "Not our interface\n"); 2433 return -ENODEV; 2434 } 2435 /* Check if we need to switch to alt interfaces prior to port 2436 * configuration */ 2437 if (interface->num_altsetting > 1) 2438 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2439 interface->needs_remote_wakeup = 1; 2440 2441 /* Allocate new hso device(s) */ 2442 switch (port_spec & HSO_INTF_MASK) { 2443 case HSO_INTF_MUX: 2444 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2445 /* Create the network device */ 2446 if (!disable_net) { 2447 hso_dev = hso_create_net_device(interface); 2448 if (!hso_dev) 2449 goto exit; 2450 tmp_dev = hso_dev; 2451 } 2452 } 2453 2454 if (hso_get_mux_ports(interface, &port_mask)) 2455 /* TODO: de-allocate everything */ 2456 goto exit; 2457 2458 shared_int = hso_create_shared_int(interface); 2459 if (!shared_int) 2460 goto exit; 2461 2462 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2463 if (port_mask & i) { 2464 hso_dev = hso_create_mux_serial_device( 2465 interface, i, shared_int); 2466 if (!hso_dev) 2467 goto exit; 2468 } 2469 } 2470 2471 if (tmp_dev) 2472 hso_dev = tmp_dev; 2473 break; 2474 2475 case HSO_INTF_BULK: 2476 /* It's a regular bulk interface */ 2477 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) 2478 && !disable_net) 2479 hso_dev = hso_create_net_device(interface); 2480 else 2481 hso_dev = 2482 hso_create_bulk_serial_device(interface, port_spec); 2483 if (!hso_dev) 2484 goto exit; 2485 break; 2486 default: 2487 goto exit; 2488 } 2489 2490 usb_driver_claim_interface(&hso_driver, interface, hso_dev); 2491 2492 /* save our data pointer in this device */ 2493 usb_set_intfdata(interface, hso_dev); 2494 2495 /* done */ 2496 return 0; 2497exit: 2498 hso_free_interface(interface); 2499 return -ENODEV; 2500} 2501 2502/* device removed, cleaning up */ 2503static void hso_disconnect(struct usb_interface *interface) 2504{ 2505 hso_free_interface(interface); 2506 2507 /* remove reference of our private data */ 2508 usb_set_intfdata(interface, NULL); 2509 2510 usb_driver_release_interface(&hso_driver, interface); 2511} 2512 2513static void async_get_intf(struct work_struct *data) 2514{ 2515 struct hso_device *hso_dev = 2516 container_of(data, struct hso_device, async_get_intf); 2517 usb_autopm_get_interface(hso_dev->interface); 2518} 2519 2520static void async_put_intf(struct work_struct *data) 2521{ 2522 struct hso_device *hso_dev = 2523 container_of(data, struct hso_device, async_put_intf); 2524 usb_autopm_put_interface(hso_dev->interface); 2525} 2526 2527static int hso_get_activity(struct hso_device *hso_dev) 2528{ 2529 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2530 if (!hso_dev->is_active) { 2531 hso_dev->is_active = 1; 2532 schedule_work(&hso_dev->async_get_intf); 2533 } 2534 } 2535 2536 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2537 return -EAGAIN; 2538 2539 usb_mark_last_busy(hso_dev->usb); 2540 2541 return 0; 2542} 2543 2544static int hso_put_activity(struct hso_device *hso_dev) 2545{ 2546 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2547 if (hso_dev->is_active) { 2548 hso_dev->is_active = 0; 2549 schedule_work(&hso_dev->async_put_intf); 2550 return -EAGAIN; 2551 } 2552 } 2553 hso_dev->is_active = 0; 2554 return 0; 2555} 2556 2557/* called by kernel when we need to suspend device */ 2558static int hso_suspend(struct usb_interface *iface, pm_message_t message) 2559{ 2560 int i, result; 2561 2562 /* Stop all serial ports */ 2563 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2564 if (serial_table[i] && (serial_table[i]->interface == iface)) { 2565 result = hso_stop_serial_device(serial_table[i]); 2566 if (result) 2567 goto out; 2568 } 2569 } 2570 2571 /* Stop all network ports */ 2572 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2573 if (network_table[i] && 2574 (network_table[i]->interface == iface)) { 2575 result = hso_stop_net_device(network_table[i]); 2576 if (result) 2577 goto out; 2578 } 2579 } 2580 2581out: 2582 return 0; 2583} 2584 2585/* called by kernel when we need to resume device */ 2586static int hso_resume(struct usb_interface *iface) 2587{ 2588 int i, result = 0; 2589 struct hso_net *hso_net; 2590 2591 /* Start all serial ports */ 2592 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2593 if (serial_table[i] && (serial_table[i]->interface == iface)) { 2594 if (dev2ser(serial_table[i])->open_count) { 2595 result = 2596 hso_start_serial_device(serial_table[i], GFP_NOIO); 2597 hso_kick_transmit(dev2ser(serial_table[i])); 2598 if (result) 2599 goto out; 2600 } 2601 } 2602 } 2603 2604 /* Start all network ports */ 2605 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2606 if (network_table[i] && 2607 (network_table[i]->interface == iface)) { 2608 hso_net = dev2net(network_table[i]); 2609 /* First transmit any lingering data, then restart the 2610 * device. */ 2611 if (hso_net->skb_tx_buf) { 2612 dev_dbg(&iface->dev, 2613 "Transmitting lingering data\n"); 2614 hso_net_start_xmit(hso_net->skb_tx_buf, 2615 hso_net->net); 2616 hso_net->skb_tx_buf = NULL; 2617 } 2618 result = hso_start_net_device(network_table[i]); 2619 if (result) 2620 goto out; 2621 } 2622 } 2623 2624out: 2625 return result; 2626} 2627 2628static void hso_serial_ref_free(struct kref *ref) 2629{ 2630 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 2631 2632 hso_free_serial_device(hso_dev); 2633} 2634 2635static void hso_free_interface(struct usb_interface *interface) 2636{ 2637 struct hso_serial *hso_dev; 2638 int i; 2639 2640 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2641 if (serial_table[i] 2642 && (serial_table[i]->interface == interface)) { 2643 hso_dev = dev2ser(serial_table[i]); 2644 if (hso_dev->tty) 2645 tty_hangup(hso_dev->tty); 2646 mutex_lock(&hso_dev->parent->mutex); 2647 hso_dev->parent->usb_gone = 1; 2648 mutex_unlock(&hso_dev->parent->mutex); 2649 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 2650 } 2651 } 2652 2653 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2654 if (network_table[i] 2655 && (network_table[i]->interface == interface)) { 2656 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 2657 /* hso_stop_net_device doesn't stop the net queue since 2658 * traffic needs to start it again when suspended */ 2659 netif_stop_queue(dev2net(network_table[i])->net); 2660 hso_stop_net_device(network_table[i]); 2661 cancel_work_sync(&network_table[i]->async_put_intf); 2662 cancel_work_sync(&network_table[i]->async_get_intf); 2663 if (rfk) 2664 rfkill_unregister(rfk); 2665 hso_free_net_device(network_table[i]); 2666 } 2667 } 2668} 2669 2670/* Helper functions */ 2671 2672/* Get the endpoint ! */ 2673static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 2674 int type, int dir) 2675{ 2676 int i; 2677 struct usb_host_interface *iface = intf->cur_altsetting; 2678 struct usb_endpoint_descriptor *endp; 2679 2680 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 2681 endp = &iface->endpoint[i].desc; 2682 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 2683 ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type)) 2684 return endp; 2685 } 2686 2687 return NULL; 2688} 2689 2690/* Get the byte that describes which ports are enabled */ 2691static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 2692{ 2693 int i; 2694 struct usb_host_interface *iface = intf->cur_altsetting; 2695 2696 if (iface->extralen == 3) { 2697 *ports = iface->extra[2]; 2698 return 0; 2699 } 2700 2701 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 2702 if (iface->endpoint[i].extralen == 3) { 2703 *ports = iface->endpoint[i].extra[2]; 2704 return 0; 2705 } 2706 } 2707 2708 return -1; 2709} 2710 2711/* interrupt urb needs to be submitted, used for serial read of muxed port */ 2712static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 2713 struct usb_device *usb, gfp_t gfp) 2714{ 2715 int result; 2716 2717 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 2718 usb_rcvintpipe(usb, 2719 shared_int->intr_endp->bEndpointAddress & 0x7F), 2720 shared_int->shared_intr_buf, 2721 shared_int->intr_endp->wMaxPacketSize, 2722 intr_callback, shared_int, 2723 shared_int->intr_endp->bInterval); 2724 2725 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 2726 if (result) 2727 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, 2728 result); 2729 2730 return result; 2731} 2732 2733/* operations setup of the serial interface */ 2734static const struct tty_operations hso_serial_ops = { 2735 .open = hso_serial_open, 2736 .close = hso_serial_close, 2737 .write = hso_serial_write, 2738 .write_room = hso_serial_write_room, 2739 .set_termios = hso_serial_set_termios, 2740 .chars_in_buffer = hso_serial_chars_in_buffer, 2741 .tiocmget = hso_serial_tiocmget, 2742 .tiocmset = hso_serial_tiocmset, 2743}; 2744 2745static struct usb_driver hso_driver = { 2746 .name = driver_name, 2747 .probe = hso_probe, 2748 .disconnect = hso_disconnect, 2749 .id_table = hso_ids, 2750 .suspend = hso_suspend, 2751 .resume = hso_resume, 2752 .supports_autosuspend = 1, 2753}; 2754 2755static int __init hso_init(void) 2756{ 2757 int i; 2758 int result; 2759 2760 /* put it in the log */ 2761 printk(KERN_INFO "hso: %s\n", version); 2762 2763 /* Initialise the serial table semaphore and table */ 2764 spin_lock_init(&serial_table_lock); 2765 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 2766 serial_table[i] = NULL; 2767 2768 /* allocate our driver using the proper amount of supported minors */ 2769 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 2770 if (!tty_drv) 2771 return -ENOMEM; 2772 2773 /* fill in all needed values */ 2774 tty_drv->magic = TTY_DRIVER_MAGIC; 2775 tty_drv->owner = THIS_MODULE; 2776 tty_drv->driver_name = driver_name; 2777 tty_drv->name = tty_filename; 2778 2779 /* if major number is provided as parameter, use that one */ 2780 if (tty_major) 2781 tty_drv->major = tty_major; 2782 2783 tty_drv->minor_start = 0; 2784 tty_drv->num = HSO_SERIAL_TTY_MINORS; 2785 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 2786 tty_drv->subtype = SERIAL_TYPE_NORMAL; 2787 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2788 tty_drv->init_termios = tty_std_termios; 2789 tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 2790 tty_drv->termios = hso_serial_termios; 2791 tty_drv->termios_locked = hso_serial_termios_locked; 2792 tty_set_operations(tty_drv, &hso_serial_ops); 2793 2794 /* register the tty driver */ 2795 result = tty_register_driver(tty_drv); 2796 if (result) { 2797 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 2798 __func__, result); 2799 return result; 2800 } 2801 2802 /* register this module as an usb driver */ 2803 result = usb_register(&hso_driver); 2804 if (result) { 2805 printk(KERN_ERR "Could not register hso driver? error: %d\n", 2806 result); 2807 /* cleanup serial interface */ 2808 tty_unregister_driver(tty_drv); 2809 return result; 2810 } 2811 2812 /* done */ 2813 return 0; 2814} 2815 2816static void __exit hso_exit(void) 2817{ 2818 printk(KERN_INFO "hso: unloaded\n"); 2819 2820 tty_unregister_driver(tty_drv); 2821 /* deregister the usb driver */ 2822 usb_deregister(&hso_driver); 2823} 2824 2825/* Module definitions */ 2826module_init(hso_init); 2827module_exit(hso_exit); 2828 2829MODULE_AUTHOR(MOD_AUTHOR); 2830MODULE_DESCRIPTION(MOD_DESCRIPTION); 2831MODULE_LICENSE(MOD_LICENSE); 2832MODULE_INFO(Version, DRIVER_VERSION); 2833 2834/* change the debug level (eg: insmod hso.ko debug=0x04) */ 2835MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 2836module_param(debug, int, S_IRUGO | S_IWUSR); 2837 2838/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 2839MODULE_PARM_DESC(tty_major, "Set the major tty number"); 2840module_param(tty_major, int, S_IRUGO | S_IWUSR); 2841 2842/* disable network interface (eg: insmod hso.ko disable_net=1) */ 2843MODULE_PARM_DESC(disable_net, "Disable the network interface"); 2844module_param(disable_net, int, S_IRUGO | S_IWUSR); 2845