1 /****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31 /****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53 #include <linux/sched.h> 54 #include <linux/slab.h> 55 #include <linux/init.h> 56 #include <linux/delay.h> 57 #include <linux/netdevice.h> 58 #include <linux/module.h> 59 #include <linux/ethtool.h> 60 #include <linux/usb.h> 61 #include <linux/timer.h> 62 #include <linux/tty.h> 63 #include <linux/tty_driver.h> 64 #include <linux/tty_flip.h> 65 #include <linux/kmod.h> 66 #include <linux/rfkill.h> 67 #include <linux/ip.h> 68 #include <linux/uaccess.h> 69 #include <linux/usb/cdc.h> 70 #include <net/arp.h> 71 #include <asm/byteorder.h> 72 #include <linux/serial_core.h> 73 #include <linux/serial.h> 74 75 76 #define DRIVER_VERSION "1.2" 77 #define MOD_AUTHOR "Option Wireless" 78 #define MOD_DESCRIPTION "USB High Speed Option driver" 79 #define MOD_LICENSE "GPL" 80 81 #define HSO_MAX_NET_DEVICES 10 82 #define HSO__MAX_MTU 2048 83 #define DEFAULT_MTU 1500 84 #define DEFAULT_MRU 1500 85 86 #define CTRL_URB_RX_SIZE 1024 87 #define CTRL_URB_TX_SIZE 64 88 89 #define BULK_URB_RX_SIZE 4096 90 #define BULK_URB_TX_SIZE 8192 91 92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 94 #define MUX_BULK_RX_BUF_COUNT 4 95 #define USB_TYPE_OPTION_VENDOR 0x20 96 97 /* These definitions are used with the struct hso_net flags element */ 98 /* - use *_bit operations on it. (bit indices not values.) */ 99 #define HSO_NET_RUNNING 0 100 101 #define HSO_NET_TX_TIMEOUT (HZ*10) 102 103 #define HSO_SERIAL_MAGIC 0x48534f31 104 105 /* Number of ttys to handle */ 106 #define HSO_SERIAL_TTY_MINORS 256 107 108 #define MAX_RX_URBS 2 109 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 111 { 112 if (tty) 113 return tty->driver_data; 114 return NULL; 115 } 116 117 /*****************************************************************************/ 118 /* Debugging functions */ 119 /*****************************************************************************/ 120 #define D__(lvl_, fmt, arg...) \ 121 do { \ 122 printk(lvl_ "[%d:%s]: " fmt "\n", \ 123 __LINE__, __func__, ## arg); \ 124 } while (0) 125 126 #define D_(lvl, args...) \ 127 do { \ 128 if (lvl & debug) \ 129 D__(KERN_INFO, args); \ 130 } while (0) 131 132 #define D1(args...) D_(0x01, ##args) 133 #define D2(args...) D_(0x02, ##args) 134 #define D3(args...) D_(0x04, ##args) 135 #define D4(args...) D_(0x08, ##args) 136 #define D5(args...) D_(0x10, ##args) 137 138 /*****************************************************************************/ 139 /* Enumerators */ 140 /*****************************************************************************/ 141 enum pkt_parse_state { 142 WAIT_IP, 143 WAIT_DATA, 144 WAIT_SYNC 145 }; 146 147 /*****************************************************************************/ 148 /* Structs */ 149 /*****************************************************************************/ 150 151 struct hso_shared_int { 152 struct usb_endpoint_descriptor *intr_endp; 153 void *shared_intr_buf; 154 struct urb *shared_intr_urb; 155 struct usb_device *usb; 156 int use_count; 157 int ref_count; 158 struct mutex shared_int_lock; 159 }; 160 161 struct hso_net { 162 struct hso_device *parent; 163 struct net_device *net; 164 struct rfkill *rfkill; 165 166 struct usb_endpoint_descriptor *in_endp; 167 struct usb_endpoint_descriptor *out_endp; 168 169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 170 struct urb *mux_bulk_tx_urb; 171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 172 void *mux_bulk_tx_buf; 173 174 struct sk_buff *skb_rx_buf; 175 struct sk_buff *skb_tx_buf; 176 177 enum pkt_parse_state rx_parse_state; 178 spinlock_t net_lock; 179 180 unsigned short rx_buf_size; 181 unsigned short rx_buf_missing; 182 struct iphdr rx_ip_hdr; 183 184 unsigned long flags; 185 }; 186 187 enum rx_ctrl_state{ 188 RX_IDLE, 189 RX_SENT, 190 RX_PENDING 191 }; 192 193 #define BM_REQUEST_TYPE (0xa1) 194 #define B_NOTIFICATION (0x20) 195 #define W_VALUE (0x0) 196 #define W_INDEX (0x2) 197 #define W_LENGTH (0x2) 198 199 #define B_OVERRUN (0x1<<6) 200 #define B_PARITY (0x1<<5) 201 #define B_FRAMING (0x1<<4) 202 #define B_RING_SIGNAL (0x1<<3) 203 #define B_BREAK (0x1<<2) 204 #define B_TX_CARRIER (0x1<<1) 205 #define B_RX_CARRIER (0x1<<0) 206 207 struct hso_serial_state_notification { 208 u8 bmRequestType; 209 u8 bNotification; 210 u16 wValue; 211 u16 wIndex; 212 u16 wLength; 213 u16 UART_state_bitmap; 214 } __attribute__((packed)); 215 216 struct hso_tiocmget { 217 struct mutex mutex; 218 wait_queue_head_t waitq; 219 int intr_completed; 220 struct usb_endpoint_descriptor *endp; 221 struct urb *urb; 222 struct hso_serial_state_notification serial_state_notification; 223 u16 prev_UART_state_bitmap; 224 struct uart_icount icount; 225 }; 226 227 228 struct hso_serial { 229 struct hso_device *parent; 230 int magic; 231 u8 minor; 232 233 struct hso_shared_int *shared_int; 234 235 /* rx/tx urb could be either a bulk urb or a control urb depending 236 on which serial port it is used on. */ 237 struct urb *rx_urb[MAX_RX_URBS]; 238 u8 num_rx_urbs; 239 u8 *rx_data[MAX_RX_URBS]; 240 u16 rx_data_length; /* should contain allocated length */ 241 242 struct urb *tx_urb; 243 u8 *tx_data; 244 u8 *tx_buffer; 245 u16 tx_data_length; /* should contain allocated length */ 246 u16 tx_data_count; 247 u16 tx_buffer_count; 248 struct usb_ctrlrequest ctrl_req_tx; 249 struct usb_ctrlrequest ctrl_req_rx; 250 251 struct usb_endpoint_descriptor *in_endp; 252 struct usb_endpoint_descriptor *out_endp; 253 254 enum rx_ctrl_state rx_state; 255 u8 rts_state; 256 u8 dtr_state; 257 unsigned tx_urb_used:1; 258 259 /* from usb_serial_port */ 260 struct tty_struct *tty; 261 int open_count; 262 spinlock_t serial_lock; 263 264 int (*write_data) (struct hso_serial *serial); 265 struct hso_tiocmget *tiocmget; 266 /* Hacks required to get flow control 267 * working on the serial receive buffers 268 * so as not to drop characters on the floor. 269 */ 270 int curr_rx_urb_idx; 271 u16 curr_rx_urb_offset; 272 u8 rx_urb_filled[MAX_RX_URBS]; 273 struct tasklet_struct unthrottle_tasklet; 274 struct work_struct retry_unthrottle_workqueue; 275 }; 276 277 struct hso_device { 278 union { 279 struct hso_serial *dev_serial; 280 struct hso_net *dev_net; 281 } port_data; 282 283 u32 port_spec; 284 285 u8 is_active; 286 u8 usb_gone; 287 struct work_struct async_get_intf; 288 struct work_struct async_put_intf; 289 struct work_struct reset_device; 290 291 struct usb_device *usb; 292 struct usb_interface *interface; 293 294 struct device *dev; 295 struct kref ref; 296 struct mutex mutex; 297 }; 298 299 /* Type of interface */ 300 #define HSO_INTF_MASK 0xFF00 301 #define HSO_INTF_MUX 0x0100 302 #define HSO_INTF_BULK 0x0200 303 304 /* Type of port */ 305 #define HSO_PORT_MASK 0xFF 306 #define HSO_PORT_NO_PORT 0x0 307 #define HSO_PORT_CONTROL 0x1 308 #define HSO_PORT_APP 0x2 309 #define HSO_PORT_GPS 0x3 310 #define HSO_PORT_PCSC 0x4 311 #define HSO_PORT_APP2 0x5 312 #define HSO_PORT_GPS_CONTROL 0x6 313 #define HSO_PORT_MSD 0x7 314 #define HSO_PORT_VOICE 0x8 315 #define HSO_PORT_DIAG2 0x9 316 #define HSO_PORT_DIAG 0x10 317 #define HSO_PORT_MODEM 0x11 318 #define HSO_PORT_NETWORK 0x12 319 320 /* Additional device info */ 321 #define HSO_INFO_MASK 0xFF000000 322 #define HSO_INFO_CRC_BUG 0x01000000 323 324 /*****************************************************************************/ 325 /* Prototypes */ 326 /*****************************************************************************/ 327 /* Serial driver functions */ 328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 329 unsigned int set, unsigned int clear); 330 static void ctrl_callback(struct urb *urb); 331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 332 static void hso_kick_transmit(struct hso_serial *serial); 333 /* Helper functions */ 334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 335 struct usb_device *usb, gfp_t gfp); 336 static void handle_usb_error(int status, const char *function, 337 struct hso_device *hso_dev); 338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 339 int type, int dir); 340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 341 static void hso_free_interface(struct usb_interface *intf); 342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 343 static int hso_stop_serial_device(struct hso_device *hso_dev); 344 static int hso_start_net_device(struct hso_device *hso_dev); 345 static void hso_free_shared_int(struct hso_shared_int *shared_int); 346 static int hso_stop_net_device(struct hso_device *hso_dev); 347 static void hso_serial_ref_free(struct kref *ref); 348 static void hso_std_serial_read_bulk_callback(struct urb *urb); 349 static int hso_mux_serial_read(struct hso_serial *serial); 350 static void async_get_intf(struct work_struct *data); 351 static void async_put_intf(struct work_struct *data); 352 static int hso_put_activity(struct hso_device *hso_dev); 353 static int hso_get_activity(struct hso_device *hso_dev); 354 static void tiocmget_intr_callback(struct urb *urb); 355 static void reset_device(struct work_struct *data); 356 /*****************************************************************************/ 357 /* Helping functions */ 358 /*****************************************************************************/ 359 360 /* #define DEBUG */ 361 362 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 363 { 364 return hso_dev->port_data.dev_net; 365 } 366 367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 368 { 369 return hso_dev->port_data.dev_serial; 370 } 371 372 /* Debugging functions */ 373 #ifdef DEBUG 374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 375 unsigned int len) 376 { 377 static char name[255]; 378 379 sprintf(name, "hso[%d:%s]", line_count, func_name); 380 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 381 } 382 383 #define DUMP(buf_, len_) \ 384 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 385 386 #define DUMP1(buf_, len_) \ 387 do { \ 388 if (0x01 & debug) \ 389 DUMP(buf_, len_); \ 390 } while (0) 391 #else 392 #define DUMP(buf_, len_) 393 #define DUMP1(buf_, len_) 394 #endif 395 396 /* module parameters */ 397 static int debug; 398 static int tty_major; 399 static int disable_net; 400 401 /* driver info */ 402 static const char driver_name[] = "hso"; 403 static const char tty_filename[] = "ttyHS"; 404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; 405 /* the usb driver itself (registered in hso_init) */ 406 static struct usb_driver hso_driver; 407 /* serial structures */ 408 static struct tty_driver *tty_drv; 409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 411 static spinlock_t serial_table_lock; 412 413 static const s32 default_port_spec[] = { 414 HSO_INTF_MUX | HSO_PORT_NETWORK, 415 HSO_INTF_BULK | HSO_PORT_DIAG, 416 HSO_INTF_BULK | HSO_PORT_MODEM, 417 0 418 }; 419 420 static const s32 icon321_port_spec[] = { 421 HSO_INTF_MUX | HSO_PORT_NETWORK, 422 HSO_INTF_BULK | HSO_PORT_DIAG2, 423 HSO_INTF_BULK | HSO_PORT_MODEM, 424 HSO_INTF_BULK | HSO_PORT_DIAG, 425 0 426 }; 427 428 #define default_port_device(vendor, product) \ 429 USB_DEVICE(vendor, product), \ 430 .driver_info = (kernel_ulong_t)default_port_spec 431 432 #define icon321_port_device(vendor, product) \ 433 USB_DEVICE(vendor, product), \ 434 .driver_info = (kernel_ulong_t)icon321_port_spec 435 436 /* list of devices we support */ 437 static const struct usb_device_id hso_ids[] = { 438 {default_port_device(0x0af0, 0x6711)}, 439 {default_port_device(0x0af0, 0x6731)}, 440 {default_port_device(0x0af0, 0x6751)}, 441 {default_port_device(0x0af0, 0x6771)}, 442 {default_port_device(0x0af0, 0x6791)}, 443 {default_port_device(0x0af0, 0x6811)}, 444 {default_port_device(0x0af0, 0x6911)}, 445 {default_port_device(0x0af0, 0x6951)}, 446 {default_port_device(0x0af0, 0x6971)}, 447 {default_port_device(0x0af0, 0x7011)}, 448 {default_port_device(0x0af0, 0x7031)}, 449 {default_port_device(0x0af0, 0x7051)}, 450 {default_port_device(0x0af0, 0x7071)}, 451 {default_port_device(0x0af0, 0x7111)}, 452 {default_port_device(0x0af0, 0x7211)}, 453 {default_port_device(0x0af0, 0x7251)}, 454 {default_port_device(0x0af0, 0x7271)}, 455 {default_port_device(0x0af0, 0x7311)}, 456 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 457 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 458 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 459 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 460 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 463 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 464 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 465 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 466 {USB_DEVICE(0x0af0, 0x7701)}, 467 {USB_DEVICE(0x0af0, 0x7706)}, 468 {USB_DEVICE(0x0af0, 0x7801)}, 469 {USB_DEVICE(0x0af0, 0x7901)}, 470 {USB_DEVICE(0x0af0, 0x7A01)}, 471 {USB_DEVICE(0x0af0, 0x7A05)}, 472 {USB_DEVICE(0x0af0, 0x8200)}, 473 {USB_DEVICE(0x0af0, 0x8201)}, 474 {USB_DEVICE(0x0af0, 0x8300)}, 475 {USB_DEVICE(0x0af0, 0x8302)}, 476 {USB_DEVICE(0x0af0, 0x8304)}, 477 {USB_DEVICE(0x0af0, 0x8400)}, 478 {USB_DEVICE(0x0af0, 0xd035)}, 479 {USB_DEVICE(0x0af0, 0xd055)}, 480 {USB_DEVICE(0x0af0, 0xd155)}, 481 {USB_DEVICE(0x0af0, 0xd255)}, 482 {USB_DEVICE(0x0af0, 0xd057)}, 483 {USB_DEVICE(0x0af0, 0xd157)}, 484 {USB_DEVICE(0x0af0, 0xd257)}, 485 {USB_DEVICE(0x0af0, 0xd357)}, 486 {USB_DEVICE(0x0af0, 0xd058)}, 487 {USB_DEVICE(0x0af0, 0xc100)}, 488 {} 489 }; 490 MODULE_DEVICE_TABLE(usb, hso_ids); 491 492 /* Sysfs attribute */ 493 static ssize_t hso_sysfs_show_porttype(struct device *dev, 494 struct device_attribute *attr, 495 char *buf) 496 { 497 struct hso_device *hso_dev = dev_get_drvdata(dev); 498 char *port_name; 499 500 if (!hso_dev) 501 return 0; 502 503 switch (hso_dev->port_spec & HSO_PORT_MASK) { 504 case HSO_PORT_CONTROL: 505 port_name = "Control"; 506 break; 507 case HSO_PORT_APP: 508 port_name = "Application"; 509 break; 510 case HSO_PORT_APP2: 511 port_name = "Application2"; 512 break; 513 case HSO_PORT_GPS: 514 port_name = "GPS"; 515 break; 516 case HSO_PORT_GPS_CONTROL: 517 port_name = "GPS Control"; 518 break; 519 case HSO_PORT_PCSC: 520 port_name = "PCSC"; 521 break; 522 case HSO_PORT_DIAG: 523 port_name = "Diagnostic"; 524 break; 525 case HSO_PORT_DIAG2: 526 port_name = "Diagnostic2"; 527 break; 528 case HSO_PORT_MODEM: 529 port_name = "Modem"; 530 break; 531 case HSO_PORT_NETWORK: 532 port_name = "Network"; 533 break; 534 default: 535 port_name = "Unknown"; 536 break; 537 } 538 539 return sprintf(buf, "%s\n", port_name); 540 } 541 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 542 543 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 544 { 545 int idx; 546 547 for (idx = 0; idx < serial->num_rx_urbs; idx++) 548 if (serial->rx_urb[idx] == urb) 549 return idx; 550 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 551 return -1; 552 } 553 554 /* converts mux value to a port spec value */ 555 static u32 hso_mux_to_port(int mux) 556 { 557 u32 result; 558 559 switch (mux) { 560 case 0x1: 561 result = HSO_PORT_CONTROL; 562 break; 563 case 0x2: 564 result = HSO_PORT_APP; 565 break; 566 case 0x4: 567 result = HSO_PORT_PCSC; 568 break; 569 case 0x8: 570 result = HSO_PORT_GPS; 571 break; 572 case 0x10: 573 result = HSO_PORT_APP2; 574 break; 575 default: 576 result = HSO_PORT_NO_PORT; 577 } 578 return result; 579 } 580 581 /* converts port spec value to a mux value */ 582 static u32 hso_port_to_mux(int port) 583 { 584 u32 result; 585 586 switch (port & HSO_PORT_MASK) { 587 case HSO_PORT_CONTROL: 588 result = 0x0; 589 break; 590 case HSO_PORT_APP: 591 result = 0x1; 592 break; 593 case HSO_PORT_PCSC: 594 result = 0x2; 595 break; 596 case HSO_PORT_GPS: 597 result = 0x3; 598 break; 599 case HSO_PORT_APP2: 600 result = 0x4; 601 break; 602 default: 603 result = 0x0; 604 } 605 return result; 606 } 607 608 static struct hso_serial *get_serial_by_shared_int_and_type( 609 struct hso_shared_int *shared_int, 610 int mux) 611 { 612 int i, port; 613 614 port = hso_mux_to_port(mux); 615 616 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 617 if (serial_table[i] && 618 (dev2ser(serial_table[i])->shared_int == shared_int) && 619 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 620 return dev2ser(serial_table[i]); 621 } 622 } 623 624 return NULL; 625 } 626 627 static struct hso_serial *get_serial_by_index(unsigned index) 628 { 629 struct hso_serial *serial = NULL; 630 unsigned long flags; 631 632 spin_lock_irqsave(&serial_table_lock, flags); 633 if (serial_table[index]) 634 serial = dev2ser(serial_table[index]); 635 spin_unlock_irqrestore(&serial_table_lock, flags); 636 637 return serial; 638 } 639 640 static int get_free_serial_index(void) 641 { 642 int index; 643 unsigned long flags; 644 645 spin_lock_irqsave(&serial_table_lock, flags); 646 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 647 if (serial_table[index] == NULL) { 648 spin_unlock_irqrestore(&serial_table_lock, flags); 649 return index; 650 } 651 } 652 spin_unlock_irqrestore(&serial_table_lock, flags); 653 654 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 655 return -1; 656 } 657 658 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 659 { 660 unsigned long flags; 661 662 spin_lock_irqsave(&serial_table_lock, flags); 663 if (serial) 664 serial_table[index] = serial->parent; 665 else 666 serial_table[index] = NULL; 667 spin_unlock_irqrestore(&serial_table_lock, flags); 668 } 669 670 static void handle_usb_error(int status, const char *function, 671 struct hso_device *hso_dev) 672 { 673 char *explanation; 674 675 switch (status) { 676 case -ENODEV: 677 explanation = "no device"; 678 break; 679 case -ENOENT: 680 explanation = "endpoint not enabled"; 681 break; 682 case -EPIPE: 683 explanation = "endpoint stalled"; 684 break; 685 case -ENOSPC: 686 explanation = "not enough bandwidth"; 687 break; 688 case -ESHUTDOWN: 689 explanation = "device disabled"; 690 break; 691 case -EHOSTUNREACH: 692 explanation = "device suspended"; 693 break; 694 case -EINVAL: 695 case -EAGAIN: 696 case -EFBIG: 697 case -EMSGSIZE: 698 explanation = "internal error"; 699 break; 700 case -EILSEQ: 701 case -EPROTO: 702 case -ETIME: 703 case -ETIMEDOUT: 704 explanation = "protocol error"; 705 if (hso_dev) 706 schedule_work(&hso_dev->reset_device); 707 break; 708 default: 709 explanation = "unknown status"; 710 break; 711 } 712 713 /* log a meaningful explanation of an USB status */ 714 D1("%s: received USB status - %s (%d)", function, explanation, status); 715 } 716 717 /* Network interface functions */ 718 719 /* called when net interface is brought up by ifconfig */ 720 static int hso_net_open(struct net_device *net) 721 { 722 struct hso_net *odev = netdev_priv(net); 723 unsigned long flags = 0; 724 725 if (!odev) { 726 dev_err(&net->dev, "No net device !\n"); 727 return -ENODEV; 728 } 729 730 odev->skb_tx_buf = NULL; 731 732 /* setup environment */ 733 spin_lock_irqsave(&odev->net_lock, flags); 734 odev->rx_parse_state = WAIT_IP; 735 odev->rx_buf_size = 0; 736 odev->rx_buf_missing = sizeof(struct iphdr); 737 spin_unlock_irqrestore(&odev->net_lock, flags); 738 739 /* We are up and running. */ 740 set_bit(HSO_NET_RUNNING, &odev->flags); 741 hso_start_net_device(odev->parent); 742 743 /* Tell the kernel we are ready to start receiving from it */ 744 netif_start_queue(net); 745 746 return 0; 747 } 748 749 /* called when interface is brought down by ifconfig */ 750 static int hso_net_close(struct net_device *net) 751 { 752 struct hso_net *odev = netdev_priv(net); 753 754 /* we don't need the queue anymore */ 755 netif_stop_queue(net); 756 /* no longer running */ 757 clear_bit(HSO_NET_RUNNING, &odev->flags); 758 759 hso_stop_net_device(odev->parent); 760 761 /* done */ 762 return 0; 763 } 764 765 /* USB tells is xmit done, we should start the netqueue again */ 766 static void write_bulk_callback(struct urb *urb) 767 { 768 struct hso_net *odev = urb->context; 769 int status = urb->status; 770 771 /* Sanity check */ 772 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 773 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 774 return; 775 } 776 777 /* Do we still have a valid kernel network device? */ 778 if (!netif_device_present(odev->net)) { 779 dev_err(&urb->dev->dev, "%s: net device not present\n", 780 __func__); 781 return; 782 } 783 784 /* log status, but don't act on it, we don't need to resubmit anything 785 * anyhow */ 786 if (status) 787 handle_usb_error(status, __func__, odev->parent); 788 789 hso_put_activity(odev->parent); 790 791 /* Tell the network interface we are ready for another frame */ 792 netif_wake_queue(odev->net); 793 } 794 795 /* called by kernel when we need to transmit a packet */ 796 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 797 struct net_device *net) 798 { 799 struct hso_net *odev = netdev_priv(net); 800 int result; 801 802 /* Tell the kernel, "No more frames 'til we are done with this one." */ 803 netif_stop_queue(net); 804 if (hso_get_activity(odev->parent) == -EAGAIN) { 805 odev->skb_tx_buf = skb; 806 return NETDEV_TX_OK; 807 } 808 809 /* log if asked */ 810 DUMP1(skb->data, skb->len); 811 /* Copy it from kernel memory to OUR memory */ 812 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 813 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 814 815 /* Fill in the URB for shipping it out. */ 816 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 817 odev->parent->usb, 818 usb_sndbulkpipe(odev->parent->usb, 819 odev->out_endp-> 820 bEndpointAddress & 0x7F), 821 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 822 odev); 823 824 /* Deal with the Zero Length packet problem, I hope */ 825 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 826 827 /* Send the URB on its merry way. */ 828 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 829 if (result) { 830 dev_warn(&odev->parent->interface->dev, 831 "failed mux_bulk_tx_urb %d\n", result); 832 net->stats.tx_errors++; 833 netif_start_queue(net); 834 } else { 835 net->stats.tx_packets++; 836 net->stats.tx_bytes += skb->len; 837 /* And tell the kernel when the last transmit started. */ 838 net->trans_start = jiffies; 839 } 840 dev_kfree_skb(skb); 841 /* we're done */ 842 return NETDEV_TX_OK; 843 } 844 845 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 846 { 847 struct hso_net *odev = netdev_priv(net); 848 849 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 850 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 851 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 852 } 853 854 static const struct ethtool_ops ops = { 855 .get_drvinfo = hso_get_drvinfo, 856 .get_link = ethtool_op_get_link 857 }; 858 859 /* called when a packet did not ack after watchdogtimeout */ 860 static void hso_net_tx_timeout(struct net_device *net) 861 { 862 struct hso_net *odev = netdev_priv(net); 863 864 if (!odev) 865 return; 866 867 /* Tell syslog we are hosed. */ 868 dev_warn(&net->dev, "Tx timed out.\n"); 869 870 /* Tear the waiting frame off the list */ 871 if (odev->mux_bulk_tx_urb && 872 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 873 usb_unlink_urb(odev->mux_bulk_tx_urb); 874 875 /* Update statistics */ 876 net->stats.tx_errors++; 877 } 878 879 /* make a real packet from the received USB buffer */ 880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 881 unsigned int count, unsigned char is_eop) 882 { 883 unsigned short temp_bytes; 884 unsigned short buffer_offset = 0; 885 unsigned short frame_len; 886 unsigned char *tmp_rx_buf; 887 888 /* log if needed */ 889 D1("Rx %d bytes", count); 890 DUMP(ip_pkt, min(128, (int)count)); 891 892 while (count) { 893 switch (odev->rx_parse_state) { 894 case WAIT_IP: 895 /* waiting for IP header. */ 896 /* wanted bytes - size of ip header */ 897 temp_bytes = 898 (count < 899 odev->rx_buf_missing) ? count : odev-> 900 rx_buf_missing; 901 902 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 903 odev->rx_buf_size, ip_pkt + buffer_offset, 904 temp_bytes); 905 906 odev->rx_buf_size += temp_bytes; 907 buffer_offset += temp_bytes; 908 odev->rx_buf_missing -= temp_bytes; 909 count -= temp_bytes; 910 911 if (!odev->rx_buf_missing) { 912 /* header is complete allocate an sk_buffer and 913 * continue to WAIT_DATA */ 914 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 915 916 if ((frame_len > DEFAULT_MRU) || 917 (frame_len < sizeof(struct iphdr))) { 918 dev_err(&odev->net->dev, 919 "Invalid frame (%d) length\n", 920 frame_len); 921 odev->rx_parse_state = WAIT_SYNC; 922 continue; 923 } 924 /* Allocate an sk_buff */ 925 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 926 frame_len); 927 if (!odev->skb_rx_buf) { 928 /* We got no receive buffer. */ 929 D1("could not allocate memory"); 930 odev->rx_parse_state = WAIT_SYNC; 931 return; 932 } 933 934 /* Copy what we got so far. make room for iphdr 935 * after tail. */ 936 tmp_rx_buf = 937 skb_put(odev->skb_rx_buf, 938 sizeof(struct iphdr)); 939 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 940 sizeof(struct iphdr)); 941 942 /* ETH_HLEN */ 943 odev->rx_buf_size = sizeof(struct iphdr); 944 945 /* Filip actually use .tot_len */ 946 odev->rx_buf_missing = 947 frame_len - sizeof(struct iphdr); 948 odev->rx_parse_state = WAIT_DATA; 949 } 950 break; 951 952 case WAIT_DATA: 953 temp_bytes = (count < odev->rx_buf_missing) 954 ? count : odev->rx_buf_missing; 955 956 /* Copy the rest of the bytes that are left in the 957 * buffer into the waiting sk_buf. */ 958 /* Make room for temp_bytes after tail. */ 959 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 960 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 961 962 odev->rx_buf_missing -= temp_bytes; 963 count -= temp_bytes; 964 buffer_offset += temp_bytes; 965 odev->rx_buf_size += temp_bytes; 966 if (!odev->rx_buf_missing) { 967 /* Packet is complete. Inject into stack. */ 968 /* We have IP packet here */ 969 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 970 /* don't check it */ 971 odev->skb_rx_buf->ip_summed = 972 CHECKSUM_UNNECESSARY; 973 974 skb_reset_mac_header(odev->skb_rx_buf); 975 976 /* Ship it off to the kernel */ 977 netif_rx(odev->skb_rx_buf); 978 /* No longer our buffer. */ 979 odev->skb_rx_buf = NULL; 980 981 /* update out statistics */ 982 odev->net->stats.rx_packets++; 983 984 odev->net->stats.rx_bytes += odev->rx_buf_size; 985 986 odev->rx_buf_size = 0; 987 odev->rx_buf_missing = sizeof(struct iphdr); 988 odev->rx_parse_state = WAIT_IP; 989 } 990 break; 991 992 case WAIT_SYNC: 993 D1(" W_S"); 994 count = 0; 995 break; 996 default: 997 D1(" "); 998 count--; 999 break; 1000 } 1001 } 1002 1003 /* Recovery mechanism for WAIT_SYNC state. */ 1004 if (is_eop) { 1005 if (odev->rx_parse_state == WAIT_SYNC) { 1006 odev->rx_parse_state = WAIT_IP; 1007 odev->rx_buf_size = 0; 1008 odev->rx_buf_missing = sizeof(struct iphdr); 1009 } 1010 } 1011 } 1012 1013 /* Moving data from usb to kernel (in interrupt state) */ 1014 static void read_bulk_callback(struct urb *urb) 1015 { 1016 struct hso_net *odev = urb->context; 1017 struct net_device *net; 1018 int result; 1019 int status = urb->status; 1020 1021 /* is al ok? (Filip: Who's Al ?) */ 1022 if (status) { 1023 handle_usb_error(status, __func__, odev->parent); 1024 return; 1025 } 1026 1027 /* Sanity check */ 1028 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1029 D1("BULK IN callback but driver is not active!"); 1030 return; 1031 } 1032 usb_mark_last_busy(urb->dev); 1033 1034 net = odev->net; 1035 1036 if (!netif_device_present(net)) { 1037 /* Somebody killed our network interface... */ 1038 return; 1039 } 1040 1041 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1042 u32 rest; 1043 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1044 rest = urb->actual_length % 1045 le16_to_cpu(odev->in_endp->wMaxPacketSize); 1046 if (((rest == 5) || (rest == 6)) && 1047 !memcmp(((u8 *) urb->transfer_buffer) + 1048 urb->actual_length - 4, crc_check, 4)) { 1049 urb->actual_length -= 4; 1050 } 1051 } 1052 1053 /* do we even have a packet? */ 1054 if (urb->actual_length) { 1055 /* Handle the IP stream, add header and push it onto network 1056 * stack if the packet is complete. */ 1057 spin_lock(&odev->net_lock); 1058 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1059 (urb->transfer_buffer_length > 1060 urb->actual_length) ? 1 : 0); 1061 spin_unlock(&odev->net_lock); 1062 } 1063 1064 /* We are done with this URB, resubmit it. Prep the USB to wait for 1065 * another frame. Reuse same as received. */ 1066 usb_fill_bulk_urb(urb, 1067 odev->parent->usb, 1068 usb_rcvbulkpipe(odev->parent->usb, 1069 odev->in_endp-> 1070 bEndpointAddress & 0x7F), 1071 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1072 read_bulk_callback, odev); 1073 1074 /* Give this to the USB subsystem so it can tell us when more data 1075 * arrives. */ 1076 result = usb_submit_urb(urb, GFP_ATOMIC); 1077 if (result) 1078 dev_warn(&odev->parent->interface->dev, 1079 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1080 result); 1081 } 1082 1083 /* Serial driver functions */ 1084 1085 static void hso_init_termios(struct ktermios *termios) 1086 { 1087 /* 1088 * The default requirements for this device are: 1089 */ 1090 termios->c_iflag &= 1091 ~(IGNBRK /* disable ignore break */ 1092 | BRKINT /* disable break causes interrupt */ 1093 | PARMRK /* disable mark parity errors */ 1094 | ISTRIP /* disable clear high bit of input characters */ 1095 | INLCR /* disable translate NL to CR */ 1096 | IGNCR /* disable ignore CR */ 1097 | ICRNL /* disable translate CR to NL */ 1098 | IXON); /* disable enable XON/XOFF flow control */ 1099 1100 /* disable postprocess output characters */ 1101 termios->c_oflag &= ~OPOST; 1102 1103 termios->c_lflag &= 1104 ~(ECHO /* disable echo input characters */ 1105 | ECHONL /* disable echo new line */ 1106 | ICANON /* disable erase, kill, werase, and rprnt 1107 special characters */ 1108 | ISIG /* disable interrupt, quit, and suspend special 1109 characters */ 1110 | IEXTEN); /* disable non-POSIX special characters */ 1111 1112 termios->c_cflag &= 1113 ~(CSIZE /* no size */ 1114 | PARENB /* disable parity bit */ 1115 | CBAUD /* clear current baud rate */ 1116 | CBAUDEX); /* clear current buad rate */ 1117 1118 termios->c_cflag |= CS8; /* character size 8 bits */ 1119 1120 /* baud rate 115200 */ 1121 tty_termios_encode_baud_rate(termios, 115200, 115200); 1122 } 1123 1124 static void _hso_serial_set_termios(struct tty_struct *tty, 1125 struct ktermios *old) 1126 { 1127 struct hso_serial *serial = get_serial_by_tty(tty); 1128 struct ktermios *termios; 1129 1130 if (!serial) { 1131 printk(KERN_ERR "%s: no tty structures", __func__); 1132 return; 1133 } 1134 1135 D4("port %d", serial->minor); 1136 1137 /* 1138 * Fix up unsupported bits 1139 */ 1140 termios = tty->termios; 1141 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1142 1143 termios->c_cflag &= 1144 ~(CSIZE /* no size */ 1145 | PARENB /* disable parity bit */ 1146 | CBAUD /* clear current baud rate */ 1147 | CBAUDEX); /* clear current buad rate */ 1148 1149 termios->c_cflag |= CS8; /* character size 8 bits */ 1150 1151 /* baud rate 115200 */ 1152 tty_encode_baud_rate(tty, 115200, 115200); 1153 } 1154 1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1156 { 1157 int result; 1158 #ifdef CONFIG_HSO_AUTOPM 1159 usb_mark_last_busy(urb->dev); 1160 #endif 1161 /* We are done with this URB, resubmit it. Prep the USB to wait for 1162 * another frame */ 1163 usb_fill_bulk_urb(urb, serial->parent->usb, 1164 usb_rcvbulkpipe(serial->parent->usb, 1165 serial->in_endp-> 1166 bEndpointAddress & 0x7F), 1167 urb->transfer_buffer, serial->rx_data_length, 1168 hso_std_serial_read_bulk_callback, serial); 1169 /* Give this to the USB subsystem so it can tell us when more data 1170 * arrives. */ 1171 result = usb_submit_urb(urb, GFP_ATOMIC); 1172 if (result) { 1173 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1174 __func__, result); 1175 } 1176 } 1177 1178 1179 1180 1181 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1182 { 1183 int count; 1184 struct urb *curr_urb; 1185 1186 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1187 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1188 count = put_rxbuf_data(curr_urb, serial); 1189 if (count == -1) 1190 return; 1191 if (count == 0) { 1192 serial->curr_rx_urb_idx++; 1193 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1194 serial->curr_rx_urb_idx = 0; 1195 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1196 } 1197 } 1198 } 1199 1200 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1201 { 1202 int count = 0; 1203 struct urb *urb; 1204 1205 urb = serial->rx_urb[0]; 1206 if (serial->open_count > 0) { 1207 count = put_rxbuf_data(urb, serial); 1208 if (count == -1) 1209 return; 1210 } 1211 /* Re issue a read as long as we receive data. */ 1212 1213 if (count == 0 && ((urb->actual_length != 0) || 1214 (serial->rx_state == RX_PENDING))) { 1215 serial->rx_state = RX_SENT; 1216 hso_mux_serial_read(serial); 1217 } else 1218 serial->rx_state = RX_IDLE; 1219 } 1220 1221 1222 /* read callback for Diag and CS port */ 1223 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1224 { 1225 struct hso_serial *serial = urb->context; 1226 int status = urb->status; 1227 1228 /* sanity check */ 1229 if (!serial) { 1230 D1("serial == NULL"); 1231 return; 1232 } else if (status) { 1233 handle_usb_error(status, __func__, serial->parent); 1234 return; 1235 } 1236 1237 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1238 D1("Actual length = %d\n", urb->actual_length); 1239 DUMP1(urb->transfer_buffer, urb->actual_length); 1240 1241 /* Anyone listening? */ 1242 if (serial->open_count == 0) 1243 return; 1244 1245 if (status == 0) { 1246 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1247 u32 rest; 1248 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1249 rest = 1250 urb->actual_length % 1251 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1252 if (((rest == 5) || (rest == 6)) && 1253 !memcmp(((u8 *) urb->transfer_buffer) + 1254 urb->actual_length - 4, crc_check, 4)) { 1255 urb->actual_length -= 4; 1256 } 1257 } 1258 /* Valid data, handle RX data */ 1259 spin_lock(&serial->serial_lock); 1260 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1261 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1262 spin_unlock(&serial->serial_lock); 1263 } else if (status == -ENOENT || status == -ECONNRESET) { 1264 /* Unlinked - check for throttled port. */ 1265 D2("Port %d, successfully unlinked urb", serial->minor); 1266 spin_lock(&serial->serial_lock); 1267 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1268 hso_resubmit_rx_bulk_urb(serial, urb); 1269 spin_unlock(&serial->serial_lock); 1270 } else { 1271 D2("Port %d, status = %d for read urb", serial->minor, status); 1272 return; 1273 } 1274 } 1275 1276 /* 1277 * This needs to be a tasklet otherwise we will 1278 * end up recursively calling this function. 1279 */ 1280 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1281 { 1282 unsigned long flags; 1283 1284 spin_lock_irqsave(&serial->serial_lock, flags); 1285 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1286 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1287 else 1288 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1289 spin_unlock_irqrestore(&serial->serial_lock, flags); 1290 } 1291 1292 static void hso_unthrottle(struct tty_struct *tty) 1293 { 1294 struct hso_serial *serial = get_serial_by_tty(tty); 1295 1296 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1297 } 1298 1299 static void hso_unthrottle_workfunc(struct work_struct *work) 1300 { 1301 struct hso_serial *serial = 1302 container_of(work, struct hso_serial, 1303 retry_unthrottle_workqueue); 1304 hso_unthrottle_tasklet(serial); 1305 } 1306 1307 /* open the requested serial port */ 1308 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1309 { 1310 struct hso_serial *serial = get_serial_by_index(tty->index); 1311 int result; 1312 1313 /* sanity check */ 1314 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1315 WARN_ON(1); 1316 tty->driver_data = NULL; 1317 D1("Failed to open port"); 1318 return -ENODEV; 1319 } 1320 1321 mutex_lock(&serial->parent->mutex); 1322 result = usb_autopm_get_interface(serial->parent->interface); 1323 if (result < 0) 1324 goto err_out; 1325 1326 D1("Opening %d", serial->minor); 1327 kref_get(&serial->parent->ref); 1328 1329 /* setup */ 1330 spin_lock_irq(&serial->serial_lock); 1331 tty->driver_data = serial; 1332 tty_kref_put(serial->tty); 1333 serial->tty = tty_kref_get(tty); 1334 spin_unlock_irq(&serial->serial_lock); 1335 1336 /* check for port already opened, if not set the termios */ 1337 serial->open_count++; 1338 if (serial->open_count == 1) { 1339 tty->low_latency = 1; 1340 serial->rx_state = RX_IDLE; 1341 /* Force default termio settings */ 1342 _hso_serial_set_termios(tty, NULL); 1343 tasklet_init(&serial->unthrottle_tasklet, 1344 (void (*)(unsigned long))hso_unthrottle_tasklet, 1345 (unsigned long)serial); 1346 INIT_WORK(&serial->retry_unthrottle_workqueue, 1347 hso_unthrottle_workfunc); 1348 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1349 if (result) { 1350 hso_stop_serial_device(serial->parent); 1351 serial->open_count--; 1352 kref_put(&serial->parent->ref, hso_serial_ref_free); 1353 } 1354 } else { 1355 D1("Port was already open"); 1356 } 1357 1358 usb_autopm_put_interface(serial->parent->interface); 1359 1360 /* done */ 1361 if (result) 1362 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1363 err_out: 1364 mutex_unlock(&serial->parent->mutex); 1365 return result; 1366 } 1367 1368 /* close the requested serial port */ 1369 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1370 { 1371 struct hso_serial *serial = tty->driver_data; 1372 u8 usb_gone; 1373 1374 D1("Closing serial port"); 1375 1376 /* Open failed, no close cleanup required */ 1377 if (serial == NULL) 1378 return; 1379 1380 mutex_lock(&serial->parent->mutex); 1381 usb_gone = serial->parent->usb_gone; 1382 1383 if (!usb_gone) 1384 usb_autopm_get_interface(serial->parent->interface); 1385 1386 /* reset the rts and dtr */ 1387 /* do the actual close */ 1388 serial->open_count--; 1389 1390 if (serial->open_count <= 0) { 1391 serial->open_count = 0; 1392 spin_lock_irq(&serial->serial_lock); 1393 if (serial->tty == tty) { 1394 serial->tty->driver_data = NULL; 1395 serial->tty = NULL; 1396 tty_kref_put(tty); 1397 } 1398 spin_unlock_irq(&serial->serial_lock); 1399 if (!usb_gone) 1400 hso_stop_serial_device(serial->parent); 1401 tasklet_kill(&serial->unthrottle_tasklet); 1402 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1403 } 1404 1405 if (!usb_gone) 1406 usb_autopm_put_interface(serial->parent->interface); 1407 1408 mutex_unlock(&serial->parent->mutex); 1409 1410 kref_put(&serial->parent->ref, hso_serial_ref_free); 1411 } 1412 1413 /* close the requested serial port */ 1414 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1415 int count) 1416 { 1417 struct hso_serial *serial = get_serial_by_tty(tty); 1418 int space, tx_bytes; 1419 unsigned long flags; 1420 1421 /* sanity check */ 1422 if (serial == NULL) { 1423 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1424 return -ENODEV; 1425 } 1426 1427 spin_lock_irqsave(&serial->serial_lock, flags); 1428 1429 space = serial->tx_data_length - serial->tx_buffer_count; 1430 tx_bytes = (count < space) ? count : space; 1431 1432 if (!tx_bytes) 1433 goto out; 1434 1435 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1436 serial->tx_buffer_count += tx_bytes; 1437 1438 out: 1439 spin_unlock_irqrestore(&serial->serial_lock, flags); 1440 1441 hso_kick_transmit(serial); 1442 /* done */ 1443 return tx_bytes; 1444 } 1445 1446 /* how much room is there for writing */ 1447 static int hso_serial_write_room(struct tty_struct *tty) 1448 { 1449 struct hso_serial *serial = get_serial_by_tty(tty); 1450 int room; 1451 unsigned long flags; 1452 1453 spin_lock_irqsave(&serial->serial_lock, flags); 1454 room = serial->tx_data_length - serial->tx_buffer_count; 1455 spin_unlock_irqrestore(&serial->serial_lock, flags); 1456 1457 /* return free room */ 1458 return room; 1459 } 1460 1461 /* setup the term */ 1462 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1463 { 1464 struct hso_serial *serial = get_serial_by_tty(tty); 1465 unsigned long flags; 1466 1467 if (old) 1468 D5("Termios called with: cflags new[%d] - old[%d]", 1469 tty->termios->c_cflag, old->c_cflag); 1470 1471 /* the actual setup */ 1472 spin_lock_irqsave(&serial->serial_lock, flags); 1473 if (serial->open_count) 1474 _hso_serial_set_termios(tty, old); 1475 else 1476 tty->termios = old; 1477 spin_unlock_irqrestore(&serial->serial_lock, flags); 1478 1479 /* done */ 1480 return; 1481 } 1482 1483 /* how many characters in the buffer */ 1484 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1485 { 1486 struct hso_serial *serial = get_serial_by_tty(tty); 1487 int chars; 1488 unsigned long flags; 1489 1490 /* sanity check */ 1491 if (serial == NULL) 1492 return 0; 1493 1494 spin_lock_irqsave(&serial->serial_lock, flags); 1495 chars = serial->tx_buffer_count; 1496 spin_unlock_irqrestore(&serial->serial_lock, flags); 1497 1498 return chars; 1499 } 1500 static int tiocmget_submit_urb(struct hso_serial *serial, 1501 struct hso_tiocmget *tiocmget, 1502 struct usb_device *usb) 1503 { 1504 int result; 1505 1506 if (serial->parent->usb_gone) 1507 return -ENODEV; 1508 usb_fill_int_urb(tiocmget->urb, usb, 1509 usb_rcvintpipe(usb, 1510 tiocmget->endp-> 1511 bEndpointAddress & 0x7F), 1512 &tiocmget->serial_state_notification, 1513 sizeof(struct hso_serial_state_notification), 1514 tiocmget_intr_callback, serial, 1515 tiocmget->endp->bInterval); 1516 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1517 if (result) { 1518 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1519 result); 1520 } 1521 return result; 1522 1523 } 1524 1525 static void tiocmget_intr_callback(struct urb *urb) 1526 { 1527 struct hso_serial *serial = urb->context; 1528 struct hso_tiocmget *tiocmget; 1529 int status = urb->status; 1530 u16 UART_state_bitmap, prev_UART_state_bitmap; 1531 struct uart_icount *icount; 1532 struct hso_serial_state_notification *serial_state_notification; 1533 struct usb_device *usb; 1534 1535 /* Sanity checks */ 1536 if (!serial) 1537 return; 1538 if (status) { 1539 handle_usb_error(status, __func__, serial->parent); 1540 return; 1541 } 1542 tiocmget = serial->tiocmget; 1543 if (!tiocmget) 1544 return; 1545 usb = serial->parent->usb; 1546 serial_state_notification = &tiocmget->serial_state_notification; 1547 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1548 serial_state_notification->bNotification != B_NOTIFICATION || 1549 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1550 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1551 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1552 dev_warn(&usb->dev, 1553 "hso received invalid serial state notification\n"); 1554 DUMP(serial_state_notification, 1555 sizeof(struct hso_serial_state_notification)); 1556 } else { 1557 1558 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1559 UART_state_bitmap); 1560 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1561 icount = &tiocmget->icount; 1562 spin_lock(&serial->serial_lock); 1563 if ((UART_state_bitmap & B_OVERRUN) != 1564 (prev_UART_state_bitmap & B_OVERRUN)) 1565 icount->parity++; 1566 if ((UART_state_bitmap & B_PARITY) != 1567 (prev_UART_state_bitmap & B_PARITY)) 1568 icount->parity++; 1569 if ((UART_state_bitmap & B_FRAMING) != 1570 (prev_UART_state_bitmap & B_FRAMING)) 1571 icount->frame++; 1572 if ((UART_state_bitmap & B_RING_SIGNAL) && 1573 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1574 icount->rng++; 1575 if ((UART_state_bitmap & B_BREAK) != 1576 (prev_UART_state_bitmap & B_BREAK)) 1577 icount->brk++; 1578 if ((UART_state_bitmap & B_TX_CARRIER) != 1579 (prev_UART_state_bitmap & B_TX_CARRIER)) 1580 icount->dsr++; 1581 if ((UART_state_bitmap & B_RX_CARRIER) != 1582 (prev_UART_state_bitmap & B_RX_CARRIER)) 1583 icount->dcd++; 1584 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1585 spin_unlock(&serial->serial_lock); 1586 tiocmget->intr_completed = 1; 1587 wake_up_interruptible(&tiocmget->waitq); 1588 } 1589 memset(serial_state_notification, 0, 1590 sizeof(struct hso_serial_state_notification)); 1591 tiocmget_submit_urb(serial, 1592 tiocmget, 1593 serial->parent->usb); 1594 } 1595 1596 /* 1597 * next few functions largely stolen from drivers/serial/serial_core.c 1598 */ 1599 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1600 * - mask passed in arg for lines of interest 1601 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1602 * Caller should use TIOCGICOUNT to see which one it was 1603 */ 1604 static int 1605 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1606 { 1607 DECLARE_WAITQUEUE(wait, current); 1608 struct uart_icount cprev, cnow; 1609 struct hso_tiocmget *tiocmget; 1610 int ret; 1611 1612 tiocmget = serial->tiocmget; 1613 if (!tiocmget) 1614 return -ENOENT; 1615 /* 1616 * note the counters on entry 1617 */ 1618 spin_lock_irq(&serial->serial_lock); 1619 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1620 spin_unlock_irq(&serial->serial_lock); 1621 add_wait_queue(&tiocmget->waitq, &wait); 1622 for (;;) { 1623 spin_lock_irq(&serial->serial_lock); 1624 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1625 spin_unlock_irq(&serial->serial_lock); 1626 set_current_state(TASK_INTERRUPTIBLE); 1627 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1628 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1629 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1630 ret = 0; 1631 break; 1632 } 1633 schedule(); 1634 /* see if a signal did it */ 1635 if (signal_pending(current)) { 1636 ret = -ERESTARTSYS; 1637 break; 1638 } 1639 cprev = cnow; 1640 } 1641 current->state = TASK_RUNNING; 1642 remove_wait_queue(&tiocmget->waitq, &wait); 1643 1644 return ret; 1645 } 1646 1647 /* 1648 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1649 * Return: write counters to the user passed counter struct 1650 * NB: both 1->0 and 0->1 transitions are counted except for 1651 * RI where only 0->1 is counted. 1652 */ 1653 static int hso_get_count(struct hso_serial *serial, 1654 struct serial_icounter_struct __user *icnt) 1655 { 1656 struct serial_icounter_struct icount; 1657 struct uart_icount cnow; 1658 struct hso_tiocmget *tiocmget = serial->tiocmget; 1659 1660 if (!tiocmget) 1661 return -ENOENT; 1662 spin_lock_irq(&serial->serial_lock); 1663 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1664 spin_unlock_irq(&serial->serial_lock); 1665 1666 icount.cts = cnow.cts; 1667 icount.dsr = cnow.dsr; 1668 icount.rng = cnow.rng; 1669 icount.dcd = cnow.dcd; 1670 icount.rx = cnow.rx; 1671 icount.tx = cnow.tx; 1672 icount.frame = cnow.frame; 1673 icount.overrun = cnow.overrun; 1674 icount.parity = cnow.parity; 1675 icount.brk = cnow.brk; 1676 icount.buf_overrun = cnow.buf_overrun; 1677 1678 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1679 } 1680 1681 1682 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1683 { 1684 int retval; 1685 struct hso_serial *serial = get_serial_by_tty(tty); 1686 struct hso_tiocmget *tiocmget; 1687 u16 UART_state_bitmap; 1688 1689 /* sanity check */ 1690 if (!serial) { 1691 D1("no tty structures"); 1692 return -EINVAL; 1693 } 1694 spin_lock_irq(&serial->serial_lock); 1695 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1696 ((serial->dtr_state) ? TIOCM_DTR : 0); 1697 tiocmget = serial->tiocmget; 1698 if (tiocmget) { 1699 1700 UART_state_bitmap = le16_to_cpu( 1701 tiocmget->prev_UART_state_bitmap); 1702 if (UART_state_bitmap & B_RING_SIGNAL) 1703 retval |= TIOCM_RNG; 1704 if (UART_state_bitmap & B_RX_CARRIER) 1705 retval |= TIOCM_CD; 1706 if (UART_state_bitmap & B_TX_CARRIER) 1707 retval |= TIOCM_DSR; 1708 } 1709 spin_unlock_irq(&serial->serial_lock); 1710 return retval; 1711 } 1712 1713 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1714 unsigned int set, unsigned int clear) 1715 { 1716 int val = 0; 1717 unsigned long flags; 1718 int if_num; 1719 struct hso_serial *serial = get_serial_by_tty(tty); 1720 1721 /* sanity check */ 1722 if (!serial) { 1723 D1("no tty structures"); 1724 return -EINVAL; 1725 } 1726 1727 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1728 return -EINVAL; 1729 1730 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1731 1732 spin_lock_irqsave(&serial->serial_lock, flags); 1733 if (set & TIOCM_RTS) 1734 serial->rts_state = 1; 1735 if (set & TIOCM_DTR) 1736 serial->dtr_state = 1; 1737 1738 if (clear & TIOCM_RTS) 1739 serial->rts_state = 0; 1740 if (clear & TIOCM_DTR) 1741 serial->dtr_state = 0; 1742 1743 if (serial->dtr_state) 1744 val |= 0x01; 1745 if (serial->rts_state) 1746 val |= 0x02; 1747 1748 spin_unlock_irqrestore(&serial->serial_lock, flags); 1749 1750 return usb_control_msg(serial->parent->usb, 1751 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1752 0x21, val, if_num, NULL, 0, 1753 USB_CTRL_SET_TIMEOUT); 1754 } 1755 1756 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1757 unsigned int cmd, unsigned long arg) 1758 { 1759 struct hso_serial *serial = get_serial_by_tty(tty); 1760 void __user *uarg = (void __user *)arg; 1761 int ret = 0; 1762 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1763 1764 if (!serial) 1765 return -ENODEV; 1766 switch (cmd) { 1767 case TIOCMIWAIT: 1768 ret = hso_wait_modem_status(serial, arg); 1769 break; 1770 1771 case TIOCGICOUNT: 1772 ret = hso_get_count(serial, uarg); 1773 break; 1774 default: 1775 ret = -ENOIOCTLCMD; 1776 break; 1777 } 1778 return ret; 1779 } 1780 1781 1782 /* starts a transmit */ 1783 static void hso_kick_transmit(struct hso_serial *serial) 1784 { 1785 u8 *temp; 1786 unsigned long flags; 1787 int res; 1788 1789 spin_lock_irqsave(&serial->serial_lock, flags); 1790 if (!serial->tx_buffer_count) 1791 goto out; 1792 1793 if (serial->tx_urb_used) 1794 goto out; 1795 1796 /* Wakeup USB interface if necessary */ 1797 if (hso_get_activity(serial->parent) == -EAGAIN) 1798 goto out; 1799 1800 /* Switch pointers around to avoid memcpy */ 1801 temp = serial->tx_buffer; 1802 serial->tx_buffer = serial->tx_data; 1803 serial->tx_data = temp; 1804 serial->tx_data_count = serial->tx_buffer_count; 1805 serial->tx_buffer_count = 0; 1806 1807 /* If temp is set, it means we switched buffers */ 1808 if (temp && serial->write_data) { 1809 res = serial->write_data(serial); 1810 if (res >= 0) 1811 serial->tx_urb_used = 1; 1812 } 1813 out: 1814 spin_unlock_irqrestore(&serial->serial_lock, flags); 1815 } 1816 1817 /* make a request (for reading and writing data to muxed serial port) */ 1818 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1819 struct urb *ctrl_urb, 1820 struct usb_ctrlrequest *ctrl_req, 1821 u8 *ctrl_urb_data, u32 size) 1822 { 1823 int result; 1824 int pipe; 1825 1826 /* Sanity check */ 1827 if (!serial || !ctrl_urb || !ctrl_req) { 1828 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1829 return -EINVAL; 1830 } 1831 1832 /* initialize */ 1833 ctrl_req->wValue = 0; 1834 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1835 ctrl_req->wLength = cpu_to_le16(size); 1836 1837 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1838 /* Reading command */ 1839 ctrl_req->bRequestType = USB_DIR_IN | 1840 USB_TYPE_OPTION_VENDOR | 1841 USB_RECIP_INTERFACE; 1842 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1843 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1844 } else { 1845 /* Writing command */ 1846 ctrl_req->bRequestType = USB_DIR_OUT | 1847 USB_TYPE_OPTION_VENDOR | 1848 USB_RECIP_INTERFACE; 1849 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1850 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1851 } 1852 /* syslog */ 1853 D2("%s command (%02x) len: %d, port: %d", 1854 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1855 ctrl_req->bRequestType, ctrl_req->wLength, port); 1856 1857 /* Load ctrl urb */ 1858 ctrl_urb->transfer_flags = 0; 1859 usb_fill_control_urb(ctrl_urb, 1860 serial->parent->usb, 1861 pipe, 1862 (u8 *) ctrl_req, 1863 ctrl_urb_data, size, ctrl_callback, serial); 1864 /* Send it on merry way */ 1865 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1866 if (result) { 1867 dev_err(&ctrl_urb->dev->dev, 1868 "%s failed submit ctrl_urb %d type %d\n", __func__, 1869 result, type); 1870 return result; 1871 } 1872 1873 /* done */ 1874 return size; 1875 } 1876 1877 /* called by intr_callback when read occurs */ 1878 static int hso_mux_serial_read(struct hso_serial *serial) 1879 { 1880 if (!serial) 1881 return -EINVAL; 1882 1883 /* clean data */ 1884 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1885 /* make the request */ 1886 1887 if (serial->num_rx_urbs != 1) { 1888 dev_err(&serial->parent->interface->dev, 1889 "ERROR: mux'd reads with multiple buffers " 1890 "not possible\n"); 1891 return 0; 1892 } 1893 return mux_device_request(serial, 1894 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1895 serial->parent->port_spec & HSO_PORT_MASK, 1896 serial->rx_urb[0], 1897 &serial->ctrl_req_rx, 1898 serial->rx_data[0], serial->rx_data_length); 1899 } 1900 1901 /* used for muxed serial port callback (muxed serial read) */ 1902 static void intr_callback(struct urb *urb) 1903 { 1904 struct hso_shared_int *shared_int = urb->context; 1905 struct hso_serial *serial; 1906 unsigned char *port_req; 1907 int status = urb->status; 1908 int i; 1909 1910 usb_mark_last_busy(urb->dev); 1911 1912 /* sanity check */ 1913 if (!shared_int) 1914 return; 1915 1916 /* status check */ 1917 if (status) { 1918 handle_usb_error(status, __func__, NULL); 1919 return; 1920 } 1921 D4("\n--- Got intr callback 0x%02X ---", status); 1922 1923 /* what request? */ 1924 port_req = urb->transfer_buffer; 1925 D4(" port_req = 0x%.2X\n", *port_req); 1926 /* loop over all muxed ports to find the one sending this */ 1927 for (i = 0; i < 8; i++) { 1928 /* max 8 channels on MUX */ 1929 if (*port_req & (1 << i)) { 1930 serial = get_serial_by_shared_int_and_type(shared_int, 1931 (1 << i)); 1932 if (serial != NULL) { 1933 D1("Pending read interrupt on port %d\n", i); 1934 spin_lock(&serial->serial_lock); 1935 if (serial->rx_state == RX_IDLE && 1936 serial->open_count > 0) { 1937 /* Setup and send a ctrl req read on 1938 * port i */ 1939 if (!serial->rx_urb_filled[0]) { 1940 serial->rx_state = RX_SENT; 1941 hso_mux_serial_read(serial); 1942 } else 1943 serial->rx_state = RX_PENDING; 1944 } else { 1945 D1("Already a read pending on " 1946 "port %d or port not open\n", i); 1947 } 1948 spin_unlock(&serial->serial_lock); 1949 } 1950 } 1951 } 1952 /* Resubmit interrupt urb */ 1953 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1954 } 1955 1956 /* called for writing to muxed serial port */ 1957 static int hso_mux_serial_write_data(struct hso_serial *serial) 1958 { 1959 if (NULL == serial) 1960 return -EINVAL; 1961 1962 return mux_device_request(serial, 1963 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1964 serial->parent->port_spec & HSO_PORT_MASK, 1965 serial->tx_urb, 1966 &serial->ctrl_req_tx, 1967 serial->tx_data, serial->tx_data_count); 1968 } 1969 1970 /* write callback for Diag and CS port */ 1971 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1972 { 1973 struct hso_serial *serial = urb->context; 1974 int status = urb->status; 1975 struct tty_struct *tty; 1976 1977 /* sanity check */ 1978 if (!serial) { 1979 D1("serial == NULL"); 1980 return; 1981 } 1982 1983 spin_lock(&serial->serial_lock); 1984 serial->tx_urb_used = 0; 1985 tty = tty_kref_get(serial->tty); 1986 spin_unlock(&serial->serial_lock); 1987 if (status) { 1988 handle_usb_error(status, __func__, serial->parent); 1989 tty_kref_put(tty); 1990 return; 1991 } 1992 hso_put_activity(serial->parent); 1993 if (tty) { 1994 tty_wakeup(tty); 1995 tty_kref_put(tty); 1996 } 1997 hso_kick_transmit(serial); 1998 1999 D1(" "); 2000 return; 2001 } 2002 2003 /* called for writing diag or CS serial port */ 2004 static int hso_std_serial_write_data(struct hso_serial *serial) 2005 { 2006 int count = serial->tx_data_count; 2007 int result; 2008 2009 usb_fill_bulk_urb(serial->tx_urb, 2010 serial->parent->usb, 2011 usb_sndbulkpipe(serial->parent->usb, 2012 serial->out_endp-> 2013 bEndpointAddress & 0x7F), 2014 serial->tx_data, serial->tx_data_count, 2015 hso_std_serial_write_bulk_callback, serial); 2016 2017 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2018 if (result) { 2019 dev_warn(&serial->parent->usb->dev, 2020 "Failed to submit urb - res %d\n", result); 2021 return result; 2022 } 2023 2024 return count; 2025 } 2026 2027 /* callback after read or write on muxed serial port */ 2028 static void ctrl_callback(struct urb *urb) 2029 { 2030 struct hso_serial *serial = urb->context; 2031 struct usb_ctrlrequest *req; 2032 int status = urb->status; 2033 struct tty_struct *tty; 2034 2035 /* sanity check */ 2036 if (!serial) 2037 return; 2038 2039 spin_lock(&serial->serial_lock); 2040 serial->tx_urb_used = 0; 2041 tty = tty_kref_get(serial->tty); 2042 spin_unlock(&serial->serial_lock); 2043 if (status) { 2044 handle_usb_error(status, __func__, serial->parent); 2045 tty_kref_put(tty); 2046 return; 2047 } 2048 2049 /* what request? */ 2050 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2051 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2052 D4("Actual length of urb = %d\n", urb->actual_length); 2053 DUMP1(urb->transfer_buffer, urb->actual_length); 2054 2055 if (req->bRequestType == 2056 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2057 /* response to a read command */ 2058 serial->rx_urb_filled[0] = 1; 2059 spin_lock(&serial->serial_lock); 2060 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2061 spin_unlock(&serial->serial_lock); 2062 } else { 2063 hso_put_activity(serial->parent); 2064 if (tty) 2065 tty_wakeup(tty); 2066 /* response to a write command */ 2067 hso_kick_transmit(serial); 2068 } 2069 tty_kref_put(tty); 2070 } 2071 2072 /* handle RX data for serial port */ 2073 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2074 { 2075 struct tty_struct *tty; 2076 int write_length_remaining = 0; 2077 int curr_write_len; 2078 2079 /* Sanity check */ 2080 if (urb == NULL || serial == NULL) { 2081 D1("serial = NULL"); 2082 return -2; 2083 } 2084 2085 /* All callers to put_rxbuf_data hold serial_lock */ 2086 tty = tty_kref_get(serial->tty); 2087 2088 /* Push data to tty */ 2089 if (tty) { 2090 write_length_remaining = urb->actual_length - 2091 serial->curr_rx_urb_offset; 2092 D1("data to push to tty"); 2093 while (write_length_remaining) { 2094 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2095 tty_kref_put(tty); 2096 return -1; 2097 } 2098 curr_write_len = tty_insert_flip_string 2099 (tty, urb->transfer_buffer + 2100 serial->curr_rx_urb_offset, 2101 write_length_remaining); 2102 serial->curr_rx_urb_offset += curr_write_len; 2103 write_length_remaining -= curr_write_len; 2104 tty_flip_buffer_push(tty); 2105 } 2106 } 2107 if (write_length_remaining == 0) { 2108 serial->curr_rx_urb_offset = 0; 2109 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2110 } 2111 tty_kref_put(tty); 2112 return write_length_remaining; 2113 } 2114 2115 2116 /* Base driver functions */ 2117 2118 static void hso_log_port(struct hso_device *hso_dev) 2119 { 2120 char *port_type; 2121 char port_dev[20]; 2122 2123 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2124 case HSO_PORT_CONTROL: 2125 port_type = "Control"; 2126 break; 2127 case HSO_PORT_APP: 2128 port_type = "Application"; 2129 break; 2130 case HSO_PORT_GPS: 2131 port_type = "GPS"; 2132 break; 2133 case HSO_PORT_GPS_CONTROL: 2134 port_type = "GPS control"; 2135 break; 2136 case HSO_PORT_APP2: 2137 port_type = "Application2"; 2138 break; 2139 case HSO_PORT_PCSC: 2140 port_type = "PCSC"; 2141 break; 2142 case HSO_PORT_DIAG: 2143 port_type = "Diagnostic"; 2144 break; 2145 case HSO_PORT_DIAG2: 2146 port_type = "Diagnostic2"; 2147 break; 2148 case HSO_PORT_MODEM: 2149 port_type = "Modem"; 2150 break; 2151 case HSO_PORT_NETWORK: 2152 port_type = "Network"; 2153 break; 2154 default: 2155 port_type = "Unknown"; 2156 break; 2157 } 2158 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2159 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2160 } else 2161 sprintf(port_dev, "/dev/%s%d", tty_filename, 2162 dev2ser(hso_dev)->minor); 2163 2164 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2165 port_type, port_dev); 2166 } 2167 2168 static int hso_start_net_device(struct hso_device *hso_dev) 2169 { 2170 int i, result = 0; 2171 struct hso_net *hso_net = dev2net(hso_dev); 2172 2173 if (!hso_net) 2174 return -ENODEV; 2175 2176 /* send URBs for all read buffers */ 2177 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2178 2179 /* Prep a receive URB */ 2180 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2181 hso_dev->usb, 2182 usb_rcvbulkpipe(hso_dev->usb, 2183 hso_net->in_endp-> 2184 bEndpointAddress & 0x7F), 2185 hso_net->mux_bulk_rx_buf_pool[i], 2186 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2187 hso_net); 2188 2189 /* Put it out there so the device can send us stuff */ 2190 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2191 GFP_NOIO); 2192 if (result) 2193 dev_warn(&hso_dev->usb->dev, 2194 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2195 i, result); 2196 } 2197 2198 return result; 2199 } 2200 2201 static int hso_stop_net_device(struct hso_device *hso_dev) 2202 { 2203 int i; 2204 struct hso_net *hso_net = dev2net(hso_dev); 2205 2206 if (!hso_net) 2207 return -ENODEV; 2208 2209 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2210 if (hso_net->mux_bulk_rx_urb_pool[i]) 2211 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2212 2213 } 2214 if (hso_net->mux_bulk_tx_urb) 2215 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2216 2217 return 0; 2218 } 2219 2220 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2221 { 2222 int i, result = 0; 2223 struct hso_serial *serial = dev2ser(hso_dev); 2224 2225 if (!serial) 2226 return -ENODEV; 2227 2228 /* If it is not the MUX port fill in and submit a bulk urb (already 2229 * allocated in hso_serial_start) */ 2230 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2231 for (i = 0; i < serial->num_rx_urbs; i++) { 2232 usb_fill_bulk_urb(serial->rx_urb[i], 2233 serial->parent->usb, 2234 usb_rcvbulkpipe(serial->parent->usb, 2235 serial->in_endp-> 2236 bEndpointAddress & 2237 0x7F), 2238 serial->rx_data[i], 2239 serial->rx_data_length, 2240 hso_std_serial_read_bulk_callback, 2241 serial); 2242 result = usb_submit_urb(serial->rx_urb[i], flags); 2243 if (result) { 2244 dev_warn(&serial->parent->usb->dev, 2245 "Failed to submit urb - res %d\n", 2246 result); 2247 break; 2248 } 2249 } 2250 } else { 2251 mutex_lock(&serial->shared_int->shared_int_lock); 2252 if (!serial->shared_int->use_count) { 2253 result = 2254 hso_mux_submit_intr_urb(serial->shared_int, 2255 hso_dev->usb, flags); 2256 } 2257 serial->shared_int->use_count++; 2258 mutex_unlock(&serial->shared_int->shared_int_lock); 2259 } 2260 if (serial->tiocmget) 2261 tiocmget_submit_urb(serial, 2262 serial->tiocmget, 2263 serial->parent->usb); 2264 return result; 2265 } 2266 2267 static int hso_stop_serial_device(struct hso_device *hso_dev) 2268 { 2269 int i; 2270 struct hso_serial *serial = dev2ser(hso_dev); 2271 struct hso_tiocmget *tiocmget; 2272 2273 if (!serial) 2274 return -ENODEV; 2275 2276 for (i = 0; i < serial->num_rx_urbs; i++) { 2277 if (serial->rx_urb[i]) { 2278 usb_kill_urb(serial->rx_urb[i]); 2279 serial->rx_urb_filled[i] = 0; 2280 } 2281 } 2282 serial->curr_rx_urb_idx = 0; 2283 serial->curr_rx_urb_offset = 0; 2284 2285 if (serial->tx_urb) 2286 usb_kill_urb(serial->tx_urb); 2287 2288 if (serial->shared_int) { 2289 mutex_lock(&serial->shared_int->shared_int_lock); 2290 if (serial->shared_int->use_count && 2291 (--serial->shared_int->use_count == 0)) { 2292 struct urb *urb; 2293 2294 urb = serial->shared_int->shared_intr_urb; 2295 if (urb) 2296 usb_kill_urb(urb); 2297 } 2298 mutex_unlock(&serial->shared_int->shared_int_lock); 2299 } 2300 tiocmget = serial->tiocmget; 2301 if (tiocmget) { 2302 wake_up_interruptible(&tiocmget->waitq); 2303 usb_kill_urb(tiocmget->urb); 2304 } 2305 2306 return 0; 2307 } 2308 2309 static void hso_serial_common_free(struct hso_serial *serial) 2310 { 2311 int i; 2312 2313 if (serial->parent->dev) 2314 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2315 2316 tty_unregister_device(tty_drv, serial->minor); 2317 2318 for (i = 0; i < serial->num_rx_urbs; i++) { 2319 /* unlink and free RX URB */ 2320 usb_free_urb(serial->rx_urb[i]); 2321 /* free the RX buffer */ 2322 kfree(serial->rx_data[i]); 2323 } 2324 2325 /* unlink and free TX URB */ 2326 usb_free_urb(serial->tx_urb); 2327 kfree(serial->tx_data); 2328 } 2329 2330 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2331 int rx_size, int tx_size) 2332 { 2333 struct device *dev; 2334 int minor; 2335 int i; 2336 2337 minor = get_free_serial_index(); 2338 if (minor < 0) 2339 goto exit; 2340 2341 /* register our minor number */ 2342 serial->parent->dev = tty_register_device(tty_drv, minor, 2343 &serial->parent->interface->dev); 2344 dev = serial->parent->dev; 2345 dev_set_drvdata(dev, serial->parent); 2346 i = device_create_file(dev, &dev_attr_hsotype); 2347 2348 /* fill in specific data for later use */ 2349 serial->minor = minor; 2350 serial->magic = HSO_SERIAL_MAGIC; 2351 spin_lock_init(&serial->serial_lock); 2352 serial->num_rx_urbs = num_urbs; 2353 2354 /* RX, allocate urb and initialize */ 2355 2356 /* prepare our RX buffer */ 2357 serial->rx_data_length = rx_size; 2358 for (i = 0; i < serial->num_rx_urbs; i++) { 2359 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2360 if (!serial->rx_urb[i]) { 2361 dev_err(dev, "Could not allocate urb?\n"); 2362 goto exit; 2363 } 2364 serial->rx_urb[i]->transfer_buffer = NULL; 2365 serial->rx_urb[i]->transfer_buffer_length = 0; 2366 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2367 GFP_KERNEL); 2368 if (!serial->rx_data[i]) { 2369 dev_err(dev, "%s - Out of memory\n", __func__); 2370 goto exit; 2371 } 2372 } 2373 2374 /* TX, allocate urb and initialize */ 2375 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2376 if (!serial->tx_urb) { 2377 dev_err(dev, "Could not allocate urb?\n"); 2378 goto exit; 2379 } 2380 serial->tx_urb->transfer_buffer = NULL; 2381 serial->tx_urb->transfer_buffer_length = 0; 2382 /* prepare our TX buffer */ 2383 serial->tx_data_count = 0; 2384 serial->tx_buffer_count = 0; 2385 serial->tx_data_length = tx_size; 2386 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2387 if (!serial->tx_data) { 2388 dev_err(dev, "%s - Out of memory\n", __func__); 2389 goto exit; 2390 } 2391 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2392 if (!serial->tx_buffer) { 2393 dev_err(dev, "%s - Out of memory\n", __func__); 2394 goto exit; 2395 } 2396 2397 return 0; 2398 exit: 2399 hso_serial_common_free(serial); 2400 return -1; 2401 } 2402 2403 /* Creates a general hso device */ 2404 static struct hso_device *hso_create_device(struct usb_interface *intf, 2405 int port_spec) 2406 { 2407 struct hso_device *hso_dev; 2408 2409 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2410 if (!hso_dev) 2411 return NULL; 2412 2413 hso_dev->port_spec = port_spec; 2414 hso_dev->usb = interface_to_usbdev(intf); 2415 hso_dev->interface = intf; 2416 kref_init(&hso_dev->ref); 2417 mutex_init(&hso_dev->mutex); 2418 2419 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2420 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2421 INIT_WORK(&hso_dev->reset_device, reset_device); 2422 2423 return hso_dev; 2424 } 2425 2426 /* Removes a network device in the network device table */ 2427 static int remove_net_device(struct hso_device *hso_dev) 2428 { 2429 int i; 2430 2431 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2432 if (network_table[i] == hso_dev) { 2433 network_table[i] = NULL; 2434 break; 2435 } 2436 } 2437 if (i == HSO_MAX_NET_DEVICES) 2438 return -1; 2439 return 0; 2440 } 2441 2442 /* Frees our network device */ 2443 static void hso_free_net_device(struct hso_device *hso_dev) 2444 { 2445 int i; 2446 struct hso_net *hso_net = dev2net(hso_dev); 2447 2448 if (!hso_net) 2449 return; 2450 2451 remove_net_device(hso_net->parent); 2452 2453 if (hso_net->net) { 2454 unregister_netdev(hso_net->net); 2455 free_netdev(hso_net->net); 2456 } 2457 2458 /* start freeing */ 2459 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2460 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2461 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2462 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2463 } 2464 usb_free_urb(hso_net->mux_bulk_tx_urb); 2465 kfree(hso_net->mux_bulk_tx_buf); 2466 hso_net->mux_bulk_tx_buf = NULL; 2467 2468 kfree(hso_dev); 2469 } 2470 2471 static const struct net_device_ops hso_netdev_ops = { 2472 .ndo_open = hso_net_open, 2473 .ndo_stop = hso_net_close, 2474 .ndo_start_xmit = hso_net_start_xmit, 2475 .ndo_tx_timeout = hso_net_tx_timeout, 2476 }; 2477 2478 /* initialize the network interface */ 2479 static void hso_net_init(struct net_device *net) 2480 { 2481 struct hso_net *hso_net = netdev_priv(net); 2482 2483 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2484 2485 /* fill in the other fields */ 2486 net->netdev_ops = &hso_netdev_ops; 2487 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2488 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2489 net->type = ARPHRD_NONE; 2490 net->mtu = DEFAULT_MTU - 14; 2491 net->tx_queue_len = 10; 2492 SET_ETHTOOL_OPS(net, &ops); 2493 2494 /* and initialize the semaphore */ 2495 spin_lock_init(&hso_net->net_lock); 2496 } 2497 2498 /* Adds a network device in the network device table */ 2499 static int add_net_device(struct hso_device *hso_dev) 2500 { 2501 int i; 2502 2503 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2504 if (network_table[i] == NULL) { 2505 network_table[i] = hso_dev; 2506 break; 2507 } 2508 } 2509 if (i == HSO_MAX_NET_DEVICES) 2510 return -1; 2511 return 0; 2512 } 2513 2514 static int hso_rfkill_set_block(void *data, bool blocked) 2515 { 2516 struct hso_device *hso_dev = data; 2517 int enabled = !blocked; 2518 int rv; 2519 2520 mutex_lock(&hso_dev->mutex); 2521 if (hso_dev->usb_gone) 2522 rv = 0; 2523 else 2524 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2525 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2526 USB_CTRL_SET_TIMEOUT); 2527 mutex_unlock(&hso_dev->mutex); 2528 return rv; 2529 } 2530 2531 static const struct rfkill_ops hso_rfkill_ops = { 2532 .set_block = hso_rfkill_set_block, 2533 }; 2534 2535 /* Creates and sets up everything for rfkill */ 2536 static void hso_create_rfkill(struct hso_device *hso_dev, 2537 struct usb_interface *interface) 2538 { 2539 struct hso_net *hso_net = dev2net(hso_dev); 2540 struct device *dev = &hso_net->net->dev; 2541 char *rfkn; 2542 2543 rfkn = kzalloc(20, GFP_KERNEL); 2544 if (!rfkn) 2545 dev_err(dev, "%s - Out of memory\n", __func__); 2546 2547 snprintf(rfkn, 20, "hso-%d", 2548 interface->altsetting->desc.bInterfaceNumber); 2549 2550 hso_net->rfkill = rfkill_alloc(rfkn, 2551 &interface_to_usbdev(interface)->dev, 2552 RFKILL_TYPE_WWAN, 2553 &hso_rfkill_ops, hso_dev); 2554 if (!hso_net->rfkill) { 2555 dev_err(dev, "%s - Out of memory\n", __func__); 2556 kfree(rfkn); 2557 return; 2558 } 2559 if (rfkill_register(hso_net->rfkill) < 0) { 2560 rfkill_destroy(hso_net->rfkill); 2561 kfree(rfkn); 2562 hso_net->rfkill = NULL; 2563 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2564 return; 2565 } 2566 } 2567 2568 static struct device_type hso_type = { 2569 .name = "wwan", 2570 }; 2571 2572 /* Creates our network device */ 2573 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2574 int port_spec) 2575 { 2576 int result, i; 2577 struct net_device *net; 2578 struct hso_net *hso_net; 2579 struct hso_device *hso_dev; 2580 2581 hso_dev = hso_create_device(interface, port_spec); 2582 if (!hso_dev) 2583 return NULL; 2584 2585 /* allocate our network device, then we can put in our private data */ 2586 /* call hso_net_init to do the basic initialization */ 2587 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2588 if (!net) { 2589 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2590 goto exit; 2591 } 2592 2593 hso_net = netdev_priv(net); 2594 2595 hso_dev->port_data.dev_net = hso_net; 2596 hso_net->net = net; 2597 hso_net->parent = hso_dev; 2598 2599 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2600 USB_DIR_IN); 2601 if (!hso_net->in_endp) { 2602 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2603 goto exit; 2604 } 2605 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2606 USB_DIR_OUT); 2607 if (!hso_net->out_endp) { 2608 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2609 goto exit; 2610 } 2611 SET_NETDEV_DEV(net, &interface->dev); 2612 SET_NETDEV_DEVTYPE(net, &hso_type); 2613 2614 /* registering our net device */ 2615 result = register_netdev(net); 2616 if (result) { 2617 dev_err(&interface->dev, "Failed to register device\n"); 2618 goto exit; 2619 } 2620 2621 /* start allocating */ 2622 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2623 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2624 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2625 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2626 goto exit; 2627 } 2628 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2629 GFP_KERNEL); 2630 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2631 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2632 goto exit; 2633 } 2634 } 2635 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2636 if (!hso_net->mux_bulk_tx_urb) { 2637 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2638 goto exit; 2639 } 2640 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2641 if (!hso_net->mux_bulk_tx_buf) { 2642 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2643 goto exit; 2644 } 2645 2646 add_net_device(hso_dev); 2647 2648 hso_log_port(hso_dev); 2649 2650 hso_create_rfkill(hso_dev, interface); 2651 2652 return hso_dev; 2653 exit: 2654 hso_free_net_device(hso_dev); 2655 return NULL; 2656 } 2657 2658 static void hso_free_tiomget(struct hso_serial *serial) 2659 { 2660 struct hso_tiocmget *tiocmget = serial->tiocmget; 2661 if (tiocmget) { 2662 if (tiocmget->urb) { 2663 usb_free_urb(tiocmget->urb); 2664 tiocmget->urb = NULL; 2665 } 2666 serial->tiocmget = NULL; 2667 kfree(tiocmget); 2668 2669 } 2670 } 2671 2672 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2673 static void hso_free_serial_device(struct hso_device *hso_dev) 2674 { 2675 struct hso_serial *serial = dev2ser(hso_dev); 2676 2677 if (!serial) 2678 return; 2679 set_serial_by_index(serial->minor, NULL); 2680 2681 hso_serial_common_free(serial); 2682 2683 if (serial->shared_int) { 2684 mutex_lock(&serial->shared_int->shared_int_lock); 2685 if (--serial->shared_int->ref_count == 0) 2686 hso_free_shared_int(serial->shared_int); 2687 else 2688 mutex_unlock(&serial->shared_int->shared_int_lock); 2689 } 2690 hso_free_tiomget(serial); 2691 kfree(serial); 2692 kfree(hso_dev); 2693 } 2694 2695 /* Creates a bulk AT channel */ 2696 static struct hso_device *hso_create_bulk_serial_device( 2697 struct usb_interface *interface, int port) 2698 { 2699 struct hso_device *hso_dev; 2700 struct hso_serial *serial; 2701 int num_urbs; 2702 struct hso_tiocmget *tiocmget; 2703 2704 hso_dev = hso_create_device(interface, port); 2705 if (!hso_dev) 2706 return NULL; 2707 2708 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2709 if (!serial) 2710 goto exit; 2711 2712 serial->parent = hso_dev; 2713 hso_dev->port_data.dev_serial = serial; 2714 2715 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2716 num_urbs = 2; 2717 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2718 GFP_KERNEL); 2719 /* it isn't going to break our heart if serial->tiocmget 2720 * allocation fails don't bother checking this. 2721 */ 2722 if (serial->tiocmget) { 2723 tiocmget = serial->tiocmget; 2724 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2725 if (tiocmget->urb) { 2726 mutex_init(&tiocmget->mutex); 2727 init_waitqueue_head(&tiocmget->waitq); 2728 tiocmget->endp = hso_get_ep( 2729 interface, 2730 USB_ENDPOINT_XFER_INT, 2731 USB_DIR_IN); 2732 } else 2733 hso_free_tiomget(serial); 2734 } 2735 } 2736 else 2737 num_urbs = 1; 2738 2739 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2740 BULK_URB_TX_SIZE)) 2741 goto exit; 2742 2743 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2744 USB_DIR_IN); 2745 if (!serial->in_endp) { 2746 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2747 goto exit2; 2748 } 2749 2750 if (! 2751 (serial->out_endp = 2752 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2753 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2754 goto exit2; 2755 } 2756 2757 serial->write_data = hso_std_serial_write_data; 2758 2759 /* and record this serial */ 2760 set_serial_by_index(serial->minor, serial); 2761 2762 /* setup the proc dirs and files if needed */ 2763 hso_log_port(hso_dev); 2764 2765 /* done, return it */ 2766 return hso_dev; 2767 2768 exit2: 2769 hso_serial_common_free(serial); 2770 exit: 2771 hso_free_tiomget(serial); 2772 kfree(serial); 2773 kfree(hso_dev); 2774 return NULL; 2775 } 2776 2777 /* Creates a multiplexed AT channel */ 2778 static 2779 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2780 int port, 2781 struct hso_shared_int *mux) 2782 { 2783 struct hso_device *hso_dev; 2784 struct hso_serial *serial; 2785 int port_spec; 2786 2787 port_spec = HSO_INTF_MUX; 2788 port_spec &= ~HSO_PORT_MASK; 2789 2790 port_spec |= hso_mux_to_port(port); 2791 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2792 return NULL; 2793 2794 hso_dev = hso_create_device(interface, port_spec); 2795 if (!hso_dev) 2796 return NULL; 2797 2798 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2799 if (!serial) 2800 goto exit; 2801 2802 hso_dev->port_data.dev_serial = serial; 2803 serial->parent = hso_dev; 2804 2805 if (hso_serial_common_create 2806 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2807 goto exit; 2808 2809 serial->tx_data_length--; 2810 serial->write_data = hso_mux_serial_write_data; 2811 2812 serial->shared_int = mux; 2813 mutex_lock(&serial->shared_int->shared_int_lock); 2814 serial->shared_int->ref_count++; 2815 mutex_unlock(&serial->shared_int->shared_int_lock); 2816 2817 /* and record this serial */ 2818 set_serial_by_index(serial->minor, serial); 2819 2820 /* setup the proc dirs and files if needed */ 2821 hso_log_port(hso_dev); 2822 2823 /* done, return it */ 2824 return hso_dev; 2825 2826 exit: 2827 if (serial) { 2828 tty_unregister_device(tty_drv, serial->minor); 2829 kfree(serial); 2830 } 2831 if (hso_dev) 2832 kfree(hso_dev); 2833 return NULL; 2834 2835 } 2836 2837 static void hso_free_shared_int(struct hso_shared_int *mux) 2838 { 2839 usb_free_urb(mux->shared_intr_urb); 2840 kfree(mux->shared_intr_buf); 2841 mutex_unlock(&mux->shared_int_lock); 2842 kfree(mux); 2843 } 2844 2845 static 2846 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2847 { 2848 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2849 2850 if (!mux) 2851 return NULL; 2852 2853 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2854 USB_DIR_IN); 2855 if (!mux->intr_endp) { 2856 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2857 goto exit; 2858 } 2859 2860 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2861 if (!mux->shared_intr_urb) { 2862 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2863 goto exit; 2864 } 2865 mux->shared_intr_buf = 2866 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2867 GFP_KERNEL); 2868 if (!mux->shared_intr_buf) { 2869 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2870 goto exit; 2871 } 2872 2873 mutex_init(&mux->shared_int_lock); 2874 2875 return mux; 2876 2877 exit: 2878 kfree(mux->shared_intr_buf); 2879 usb_free_urb(mux->shared_intr_urb); 2880 kfree(mux); 2881 return NULL; 2882 } 2883 2884 /* Gets the port spec for a certain interface */ 2885 static int hso_get_config_data(struct usb_interface *interface) 2886 { 2887 struct usb_device *usbdev = interface_to_usbdev(interface); 2888 u8 config_data[17]; 2889 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2890 s32 result; 2891 2892 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2893 0x86, 0xC0, 0, 0, config_data, 17, 2894 USB_CTRL_SET_TIMEOUT) != 0x11) { 2895 return -EIO; 2896 } 2897 2898 switch (config_data[if_num]) { 2899 case 0x0: 2900 result = 0; 2901 break; 2902 case 0x1: 2903 result = HSO_PORT_DIAG; 2904 break; 2905 case 0x2: 2906 result = HSO_PORT_GPS; 2907 break; 2908 case 0x3: 2909 result = HSO_PORT_GPS_CONTROL; 2910 break; 2911 case 0x4: 2912 result = HSO_PORT_APP; 2913 break; 2914 case 0x5: 2915 result = HSO_PORT_APP2; 2916 break; 2917 case 0x6: 2918 result = HSO_PORT_CONTROL; 2919 break; 2920 case 0x7: 2921 result = HSO_PORT_NETWORK; 2922 break; 2923 case 0x8: 2924 result = HSO_PORT_MODEM; 2925 break; 2926 case 0x9: 2927 result = HSO_PORT_MSD; 2928 break; 2929 case 0xa: 2930 result = HSO_PORT_PCSC; 2931 break; 2932 case 0xb: 2933 result = HSO_PORT_VOICE; 2934 break; 2935 default: 2936 result = 0; 2937 } 2938 2939 if (result) 2940 result |= HSO_INTF_BULK; 2941 2942 if (config_data[16] & 0x1) 2943 result |= HSO_INFO_CRC_BUG; 2944 2945 return result; 2946 } 2947 2948 /* called once for each interface upon device insertion */ 2949 static int hso_probe(struct usb_interface *interface, 2950 const struct usb_device_id *id) 2951 { 2952 int mux, i, if_num, port_spec; 2953 unsigned char port_mask; 2954 struct hso_device *hso_dev = NULL; 2955 struct hso_shared_int *shared_int; 2956 struct hso_device *tmp_dev = NULL; 2957 2958 if_num = interface->altsetting->desc.bInterfaceNumber; 2959 2960 /* Get the interface/port specification from either driver_info or from 2961 * the device itself */ 2962 if (id->driver_info) 2963 port_spec = ((u32 *)(id->driver_info))[if_num]; 2964 else 2965 port_spec = hso_get_config_data(interface); 2966 2967 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2968 dev_err(&interface->dev, "Not our interface\n"); 2969 return -ENODEV; 2970 } 2971 /* Check if we need to switch to alt interfaces prior to port 2972 * configuration */ 2973 if (interface->num_altsetting > 1) 2974 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2975 interface->needs_remote_wakeup = 1; 2976 2977 /* Allocate new hso device(s) */ 2978 switch (port_spec & HSO_INTF_MASK) { 2979 case HSO_INTF_MUX: 2980 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2981 /* Create the network device */ 2982 if (!disable_net) { 2983 hso_dev = hso_create_net_device(interface, 2984 port_spec); 2985 if (!hso_dev) 2986 goto exit; 2987 tmp_dev = hso_dev; 2988 } 2989 } 2990 2991 if (hso_get_mux_ports(interface, &port_mask)) 2992 /* TODO: de-allocate everything */ 2993 goto exit; 2994 2995 shared_int = hso_create_shared_int(interface); 2996 if (!shared_int) 2997 goto exit; 2998 2999 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 3000 if (port_mask & i) { 3001 hso_dev = hso_create_mux_serial_device( 3002 interface, i, shared_int); 3003 if (!hso_dev) 3004 goto exit; 3005 } 3006 } 3007 3008 if (tmp_dev) 3009 hso_dev = tmp_dev; 3010 break; 3011 3012 case HSO_INTF_BULK: 3013 /* It's a regular bulk interface */ 3014 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 3015 !disable_net) 3016 hso_dev = hso_create_net_device(interface, port_spec); 3017 else 3018 hso_dev = 3019 hso_create_bulk_serial_device(interface, port_spec); 3020 if (!hso_dev) 3021 goto exit; 3022 break; 3023 default: 3024 goto exit; 3025 } 3026 3027 /* save our data pointer in this device */ 3028 usb_set_intfdata(interface, hso_dev); 3029 3030 /* done */ 3031 return 0; 3032 exit: 3033 hso_free_interface(interface); 3034 return -ENODEV; 3035 } 3036 3037 /* device removed, cleaning up */ 3038 static void hso_disconnect(struct usb_interface *interface) 3039 { 3040 hso_free_interface(interface); 3041 3042 /* remove reference of our private data */ 3043 usb_set_intfdata(interface, NULL); 3044 } 3045 3046 static void async_get_intf(struct work_struct *data) 3047 { 3048 struct hso_device *hso_dev = 3049 container_of(data, struct hso_device, async_get_intf); 3050 usb_autopm_get_interface(hso_dev->interface); 3051 } 3052 3053 static void async_put_intf(struct work_struct *data) 3054 { 3055 struct hso_device *hso_dev = 3056 container_of(data, struct hso_device, async_put_intf); 3057 usb_autopm_put_interface(hso_dev->interface); 3058 } 3059 3060 static int hso_get_activity(struct hso_device *hso_dev) 3061 { 3062 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3063 if (!hso_dev->is_active) { 3064 hso_dev->is_active = 1; 3065 schedule_work(&hso_dev->async_get_intf); 3066 } 3067 } 3068 3069 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3070 return -EAGAIN; 3071 3072 usb_mark_last_busy(hso_dev->usb); 3073 3074 return 0; 3075 } 3076 3077 static int hso_put_activity(struct hso_device *hso_dev) 3078 { 3079 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3080 if (hso_dev->is_active) { 3081 hso_dev->is_active = 0; 3082 schedule_work(&hso_dev->async_put_intf); 3083 return -EAGAIN; 3084 } 3085 } 3086 hso_dev->is_active = 0; 3087 return 0; 3088 } 3089 3090 /* called by kernel when we need to suspend device */ 3091 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3092 { 3093 int i, result; 3094 3095 /* Stop all serial ports */ 3096 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3097 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3098 result = hso_stop_serial_device(serial_table[i]); 3099 if (result) 3100 goto out; 3101 } 3102 } 3103 3104 /* Stop all network ports */ 3105 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3106 if (network_table[i] && 3107 (network_table[i]->interface == iface)) { 3108 result = hso_stop_net_device(network_table[i]); 3109 if (result) 3110 goto out; 3111 } 3112 } 3113 3114 out: 3115 return 0; 3116 } 3117 3118 /* called by kernel when we need to resume device */ 3119 static int hso_resume(struct usb_interface *iface) 3120 { 3121 int i, result = 0; 3122 struct hso_net *hso_net; 3123 3124 /* Start all serial ports */ 3125 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3126 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3127 if (dev2ser(serial_table[i])->open_count) { 3128 result = 3129 hso_start_serial_device(serial_table[i], GFP_NOIO); 3130 hso_kick_transmit(dev2ser(serial_table[i])); 3131 if (result) 3132 goto out; 3133 } 3134 } 3135 } 3136 3137 /* Start all network ports */ 3138 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3139 if (network_table[i] && 3140 (network_table[i]->interface == iface)) { 3141 hso_net = dev2net(network_table[i]); 3142 if (hso_net->flags & IFF_UP) { 3143 /* First transmit any lingering data, 3144 then restart the device. */ 3145 if (hso_net->skb_tx_buf) { 3146 dev_dbg(&iface->dev, 3147 "Transmitting" 3148 " lingering data\n"); 3149 hso_net_start_xmit(hso_net->skb_tx_buf, 3150 hso_net->net); 3151 hso_net->skb_tx_buf = NULL; 3152 } 3153 result = hso_start_net_device(network_table[i]); 3154 if (result) 3155 goto out; 3156 } 3157 } 3158 } 3159 3160 out: 3161 return result; 3162 } 3163 3164 static void reset_device(struct work_struct *data) 3165 { 3166 struct hso_device *hso_dev = 3167 container_of(data, struct hso_device, reset_device); 3168 struct usb_device *usb = hso_dev->usb; 3169 int result; 3170 3171 if (hso_dev->usb_gone) { 3172 D1("No reset during disconnect\n"); 3173 } else { 3174 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3175 if (result < 0) 3176 D1("unable to lock device for reset: %d\n", result); 3177 else { 3178 usb_reset_device(usb); 3179 usb_unlock_device(usb); 3180 } 3181 } 3182 } 3183 3184 static void hso_serial_ref_free(struct kref *ref) 3185 { 3186 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3187 3188 hso_free_serial_device(hso_dev); 3189 } 3190 3191 static void hso_free_interface(struct usb_interface *interface) 3192 { 3193 struct hso_serial *hso_dev; 3194 struct tty_struct *tty; 3195 int i; 3196 3197 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3198 if (serial_table[i] && 3199 (serial_table[i]->interface == interface)) { 3200 hso_dev = dev2ser(serial_table[i]); 3201 spin_lock_irq(&hso_dev->serial_lock); 3202 tty = tty_kref_get(hso_dev->tty); 3203 spin_unlock_irq(&hso_dev->serial_lock); 3204 if (tty) 3205 tty_hangup(tty); 3206 mutex_lock(&hso_dev->parent->mutex); 3207 tty_kref_put(tty); 3208 hso_dev->parent->usb_gone = 1; 3209 mutex_unlock(&hso_dev->parent->mutex); 3210 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3211 } 3212 } 3213 3214 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3215 if (network_table[i] && 3216 (network_table[i]->interface == interface)) { 3217 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3218 /* hso_stop_net_device doesn't stop the net queue since 3219 * traffic needs to start it again when suspended */ 3220 netif_stop_queue(dev2net(network_table[i])->net); 3221 hso_stop_net_device(network_table[i]); 3222 cancel_work_sync(&network_table[i]->async_put_intf); 3223 cancel_work_sync(&network_table[i]->async_get_intf); 3224 if (rfk) { 3225 rfkill_unregister(rfk); 3226 rfkill_destroy(rfk); 3227 } 3228 hso_free_net_device(network_table[i]); 3229 } 3230 } 3231 } 3232 3233 /* Helper functions */ 3234 3235 /* Get the endpoint ! */ 3236 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3237 int type, int dir) 3238 { 3239 int i; 3240 struct usb_host_interface *iface = intf->cur_altsetting; 3241 struct usb_endpoint_descriptor *endp; 3242 3243 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3244 endp = &iface->endpoint[i].desc; 3245 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3246 (usb_endpoint_type(endp) == type)) 3247 return endp; 3248 } 3249 3250 return NULL; 3251 } 3252 3253 /* Get the byte that describes which ports are enabled */ 3254 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3255 { 3256 int i; 3257 struct usb_host_interface *iface = intf->cur_altsetting; 3258 3259 if (iface->extralen == 3) { 3260 *ports = iface->extra[2]; 3261 return 0; 3262 } 3263 3264 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3265 if (iface->endpoint[i].extralen == 3) { 3266 *ports = iface->endpoint[i].extra[2]; 3267 return 0; 3268 } 3269 } 3270 3271 return -1; 3272 } 3273 3274 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3275 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3276 struct usb_device *usb, gfp_t gfp) 3277 { 3278 int result; 3279 3280 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3281 usb_rcvintpipe(usb, 3282 shared_int->intr_endp->bEndpointAddress & 0x7F), 3283 shared_int->shared_intr_buf, 3284 1, 3285 intr_callback, shared_int, 3286 shared_int->intr_endp->bInterval); 3287 3288 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3289 if (result) 3290 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3291 result); 3292 3293 return result; 3294 } 3295 3296 /* operations setup of the serial interface */ 3297 static const struct tty_operations hso_serial_ops = { 3298 .open = hso_serial_open, 3299 .close = hso_serial_close, 3300 .write = hso_serial_write, 3301 .write_room = hso_serial_write_room, 3302 .ioctl = hso_serial_ioctl, 3303 .set_termios = hso_serial_set_termios, 3304 .chars_in_buffer = hso_serial_chars_in_buffer, 3305 .tiocmget = hso_serial_tiocmget, 3306 .tiocmset = hso_serial_tiocmset, 3307 .unthrottle = hso_unthrottle 3308 }; 3309 3310 static struct usb_driver hso_driver = { 3311 .name = driver_name, 3312 .probe = hso_probe, 3313 .disconnect = hso_disconnect, 3314 .id_table = hso_ids, 3315 .suspend = hso_suspend, 3316 .resume = hso_resume, 3317 .reset_resume = hso_resume, 3318 .supports_autosuspend = 1, 3319 }; 3320 3321 static int __init hso_init(void) 3322 { 3323 int i; 3324 int result; 3325 3326 /* put it in the log */ 3327 printk(KERN_INFO "hso: %s\n", version); 3328 3329 /* Initialise the serial table semaphore and table */ 3330 spin_lock_init(&serial_table_lock); 3331 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3332 serial_table[i] = NULL; 3333 3334 /* allocate our driver using the proper amount of supported minors */ 3335 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3336 if (!tty_drv) 3337 return -ENOMEM; 3338 3339 /* fill in all needed values */ 3340 tty_drv->magic = TTY_DRIVER_MAGIC; 3341 tty_drv->owner = THIS_MODULE; 3342 tty_drv->driver_name = driver_name; 3343 tty_drv->name = tty_filename; 3344 3345 /* if major number is provided as parameter, use that one */ 3346 if (tty_major) 3347 tty_drv->major = tty_major; 3348 3349 tty_drv->minor_start = 0; 3350 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3351 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3352 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3353 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3354 tty_drv->init_termios = tty_std_termios; 3355 hso_init_termios(&tty_drv->init_termios); 3356 tty_set_operations(tty_drv, &hso_serial_ops); 3357 3358 /* register the tty driver */ 3359 result = tty_register_driver(tty_drv); 3360 if (result) { 3361 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3362 __func__, result); 3363 return result; 3364 } 3365 3366 /* register this module as an usb driver */ 3367 result = usb_register(&hso_driver); 3368 if (result) { 3369 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3370 result); 3371 /* cleanup serial interface */ 3372 tty_unregister_driver(tty_drv); 3373 return result; 3374 } 3375 3376 /* done */ 3377 return 0; 3378 } 3379 3380 static void __exit hso_exit(void) 3381 { 3382 printk(KERN_INFO "hso: unloaded\n"); 3383 3384 tty_unregister_driver(tty_drv); 3385 /* deregister the usb driver */ 3386 usb_deregister(&hso_driver); 3387 } 3388 3389 /* Module definitions */ 3390 module_init(hso_init); 3391 module_exit(hso_exit); 3392 3393 MODULE_AUTHOR(MOD_AUTHOR); 3394 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3395 MODULE_LICENSE(MOD_LICENSE); 3396 MODULE_INFO(Version, DRIVER_VERSION); 3397 3398 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3399 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3400 module_param(debug, int, S_IRUGO | S_IWUSR); 3401 3402 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3403 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3404 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3405 3406 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3407 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3408 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3409