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 /* We are done with this URB, resubmit it. Prep the USB to wait for 1159 * another frame */ 1160 usb_fill_bulk_urb(urb, serial->parent->usb, 1161 usb_rcvbulkpipe(serial->parent->usb, 1162 serial->in_endp-> 1163 bEndpointAddress & 0x7F), 1164 urb->transfer_buffer, serial->rx_data_length, 1165 hso_std_serial_read_bulk_callback, serial); 1166 /* Give this to the USB subsystem so it can tell us when more data 1167 * arrives. */ 1168 result = usb_submit_urb(urb, GFP_ATOMIC); 1169 if (result) { 1170 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1171 __func__, result); 1172 } 1173 } 1174 1175 1176 1177 1178 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1179 { 1180 int count; 1181 struct urb *curr_urb; 1182 1183 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1184 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1185 count = put_rxbuf_data(curr_urb, serial); 1186 if (count == -1) 1187 return; 1188 if (count == 0) { 1189 serial->curr_rx_urb_idx++; 1190 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1191 serial->curr_rx_urb_idx = 0; 1192 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1193 } 1194 } 1195 } 1196 1197 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1198 { 1199 int count = 0; 1200 struct urb *urb; 1201 1202 urb = serial->rx_urb[0]; 1203 if (serial->open_count > 0) { 1204 count = put_rxbuf_data(urb, serial); 1205 if (count == -1) 1206 return; 1207 } 1208 /* Re issue a read as long as we receive data. */ 1209 1210 if (count == 0 && ((urb->actual_length != 0) || 1211 (serial->rx_state == RX_PENDING))) { 1212 serial->rx_state = RX_SENT; 1213 hso_mux_serial_read(serial); 1214 } else 1215 serial->rx_state = RX_IDLE; 1216 } 1217 1218 1219 /* read callback for Diag and CS port */ 1220 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1221 { 1222 struct hso_serial *serial = urb->context; 1223 int status = urb->status; 1224 1225 /* sanity check */ 1226 if (!serial) { 1227 D1("serial == NULL"); 1228 return; 1229 } else if (status) { 1230 handle_usb_error(status, __func__, serial->parent); 1231 return; 1232 } 1233 1234 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1235 D1("Actual length = %d\n", urb->actual_length); 1236 DUMP1(urb->transfer_buffer, urb->actual_length); 1237 1238 /* Anyone listening? */ 1239 if (serial->open_count == 0) 1240 return; 1241 1242 if (status == 0) { 1243 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1244 u32 rest; 1245 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1246 rest = 1247 urb->actual_length % 1248 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1249 if (((rest == 5) || (rest == 6)) && 1250 !memcmp(((u8 *) urb->transfer_buffer) + 1251 urb->actual_length - 4, crc_check, 4)) { 1252 urb->actual_length -= 4; 1253 } 1254 } 1255 /* Valid data, handle RX data */ 1256 spin_lock(&serial->serial_lock); 1257 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1258 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1259 spin_unlock(&serial->serial_lock); 1260 } else if (status == -ENOENT || status == -ECONNRESET) { 1261 /* Unlinked - check for throttled port. */ 1262 D2("Port %d, successfully unlinked urb", serial->minor); 1263 spin_lock(&serial->serial_lock); 1264 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1265 hso_resubmit_rx_bulk_urb(serial, urb); 1266 spin_unlock(&serial->serial_lock); 1267 } else { 1268 D2("Port %d, status = %d for read urb", serial->minor, status); 1269 return; 1270 } 1271 } 1272 1273 /* 1274 * This needs to be a tasklet otherwise we will 1275 * end up recursively calling this function. 1276 */ 1277 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1278 { 1279 unsigned long flags; 1280 1281 spin_lock_irqsave(&serial->serial_lock, flags); 1282 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1283 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1284 else 1285 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1286 spin_unlock_irqrestore(&serial->serial_lock, flags); 1287 } 1288 1289 static void hso_unthrottle(struct tty_struct *tty) 1290 { 1291 struct hso_serial *serial = get_serial_by_tty(tty); 1292 1293 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1294 } 1295 1296 static void hso_unthrottle_workfunc(struct work_struct *work) 1297 { 1298 struct hso_serial *serial = 1299 container_of(work, struct hso_serial, 1300 retry_unthrottle_workqueue); 1301 hso_unthrottle_tasklet(serial); 1302 } 1303 1304 /* open the requested serial port */ 1305 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1306 { 1307 struct hso_serial *serial = get_serial_by_index(tty->index); 1308 int result; 1309 1310 /* sanity check */ 1311 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1312 WARN_ON(1); 1313 tty->driver_data = NULL; 1314 D1("Failed to open port"); 1315 return -ENODEV; 1316 } 1317 1318 mutex_lock(&serial->parent->mutex); 1319 result = usb_autopm_get_interface(serial->parent->interface); 1320 if (result < 0) 1321 goto err_out; 1322 1323 D1("Opening %d", serial->minor); 1324 kref_get(&serial->parent->ref); 1325 1326 /* setup */ 1327 spin_lock_irq(&serial->serial_lock); 1328 tty->driver_data = serial; 1329 tty_kref_put(serial->tty); 1330 serial->tty = tty_kref_get(tty); 1331 spin_unlock_irq(&serial->serial_lock); 1332 1333 /* check for port already opened, if not set the termios */ 1334 serial->open_count++; 1335 if (serial->open_count == 1) { 1336 tty->low_latency = 1; 1337 serial->rx_state = RX_IDLE; 1338 /* Force default termio settings */ 1339 _hso_serial_set_termios(tty, NULL); 1340 tasklet_init(&serial->unthrottle_tasklet, 1341 (void (*)(unsigned long))hso_unthrottle_tasklet, 1342 (unsigned long)serial); 1343 INIT_WORK(&serial->retry_unthrottle_workqueue, 1344 hso_unthrottle_workfunc); 1345 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1346 if (result) { 1347 hso_stop_serial_device(serial->parent); 1348 serial->open_count--; 1349 kref_put(&serial->parent->ref, hso_serial_ref_free); 1350 } 1351 } else { 1352 D1("Port was already open"); 1353 } 1354 1355 usb_autopm_put_interface(serial->parent->interface); 1356 1357 /* done */ 1358 if (result) 1359 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1360 err_out: 1361 mutex_unlock(&serial->parent->mutex); 1362 return result; 1363 } 1364 1365 /* close the requested serial port */ 1366 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1367 { 1368 struct hso_serial *serial = tty->driver_data; 1369 u8 usb_gone; 1370 1371 D1("Closing serial port"); 1372 1373 /* Open failed, no close cleanup required */ 1374 if (serial == NULL) 1375 return; 1376 1377 mutex_lock(&serial->parent->mutex); 1378 usb_gone = serial->parent->usb_gone; 1379 1380 if (!usb_gone) 1381 usb_autopm_get_interface(serial->parent->interface); 1382 1383 /* reset the rts and dtr */ 1384 /* do the actual close */ 1385 serial->open_count--; 1386 1387 if (serial->open_count <= 0) { 1388 serial->open_count = 0; 1389 spin_lock_irq(&serial->serial_lock); 1390 if (serial->tty == tty) { 1391 serial->tty->driver_data = NULL; 1392 serial->tty = NULL; 1393 tty_kref_put(tty); 1394 } 1395 spin_unlock_irq(&serial->serial_lock); 1396 if (!usb_gone) 1397 hso_stop_serial_device(serial->parent); 1398 tasklet_kill(&serial->unthrottle_tasklet); 1399 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1400 } 1401 1402 if (!usb_gone) 1403 usb_autopm_put_interface(serial->parent->interface); 1404 1405 mutex_unlock(&serial->parent->mutex); 1406 1407 kref_put(&serial->parent->ref, hso_serial_ref_free); 1408 } 1409 1410 /* close the requested serial port */ 1411 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1412 int count) 1413 { 1414 struct hso_serial *serial = get_serial_by_tty(tty); 1415 int space, tx_bytes; 1416 unsigned long flags; 1417 1418 /* sanity check */ 1419 if (serial == NULL) { 1420 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1421 return -ENODEV; 1422 } 1423 1424 spin_lock_irqsave(&serial->serial_lock, flags); 1425 1426 space = serial->tx_data_length - serial->tx_buffer_count; 1427 tx_bytes = (count < space) ? count : space; 1428 1429 if (!tx_bytes) 1430 goto out; 1431 1432 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1433 serial->tx_buffer_count += tx_bytes; 1434 1435 out: 1436 spin_unlock_irqrestore(&serial->serial_lock, flags); 1437 1438 hso_kick_transmit(serial); 1439 /* done */ 1440 return tx_bytes; 1441 } 1442 1443 /* how much room is there for writing */ 1444 static int hso_serial_write_room(struct tty_struct *tty) 1445 { 1446 struct hso_serial *serial = get_serial_by_tty(tty); 1447 int room; 1448 unsigned long flags; 1449 1450 spin_lock_irqsave(&serial->serial_lock, flags); 1451 room = serial->tx_data_length - serial->tx_buffer_count; 1452 spin_unlock_irqrestore(&serial->serial_lock, flags); 1453 1454 /* return free room */ 1455 return room; 1456 } 1457 1458 /* setup the term */ 1459 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1460 { 1461 struct hso_serial *serial = get_serial_by_tty(tty); 1462 unsigned long flags; 1463 1464 if (old) 1465 D5("Termios called with: cflags new[%d] - old[%d]", 1466 tty->termios->c_cflag, old->c_cflag); 1467 1468 /* the actual setup */ 1469 spin_lock_irqsave(&serial->serial_lock, flags); 1470 if (serial->open_count) 1471 _hso_serial_set_termios(tty, old); 1472 else 1473 tty->termios = old; 1474 spin_unlock_irqrestore(&serial->serial_lock, flags); 1475 1476 /* done */ 1477 return; 1478 } 1479 1480 /* how many characters in the buffer */ 1481 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1482 { 1483 struct hso_serial *serial = get_serial_by_tty(tty); 1484 int chars; 1485 unsigned long flags; 1486 1487 /* sanity check */ 1488 if (serial == NULL) 1489 return 0; 1490 1491 spin_lock_irqsave(&serial->serial_lock, flags); 1492 chars = serial->tx_buffer_count; 1493 spin_unlock_irqrestore(&serial->serial_lock, flags); 1494 1495 return chars; 1496 } 1497 static int tiocmget_submit_urb(struct hso_serial *serial, 1498 struct hso_tiocmget *tiocmget, 1499 struct usb_device *usb) 1500 { 1501 int result; 1502 1503 if (serial->parent->usb_gone) 1504 return -ENODEV; 1505 usb_fill_int_urb(tiocmget->urb, usb, 1506 usb_rcvintpipe(usb, 1507 tiocmget->endp-> 1508 bEndpointAddress & 0x7F), 1509 &tiocmget->serial_state_notification, 1510 sizeof(struct hso_serial_state_notification), 1511 tiocmget_intr_callback, serial, 1512 tiocmget->endp->bInterval); 1513 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1514 if (result) { 1515 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1516 result); 1517 } 1518 return result; 1519 1520 } 1521 1522 static void tiocmget_intr_callback(struct urb *urb) 1523 { 1524 struct hso_serial *serial = urb->context; 1525 struct hso_tiocmget *tiocmget; 1526 int status = urb->status; 1527 u16 UART_state_bitmap, prev_UART_state_bitmap; 1528 struct uart_icount *icount; 1529 struct hso_serial_state_notification *serial_state_notification; 1530 struct usb_device *usb; 1531 1532 /* Sanity checks */ 1533 if (!serial) 1534 return; 1535 if (status) { 1536 handle_usb_error(status, __func__, serial->parent); 1537 return; 1538 } 1539 tiocmget = serial->tiocmget; 1540 if (!tiocmget) 1541 return; 1542 usb = serial->parent->usb; 1543 serial_state_notification = &tiocmget->serial_state_notification; 1544 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1545 serial_state_notification->bNotification != B_NOTIFICATION || 1546 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1547 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1548 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1549 dev_warn(&usb->dev, 1550 "hso received invalid serial state notification\n"); 1551 DUMP(serial_state_notification, 1552 sizeof(struct hso_serial_state_notification)); 1553 } else { 1554 1555 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1556 UART_state_bitmap); 1557 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1558 icount = &tiocmget->icount; 1559 spin_lock(&serial->serial_lock); 1560 if ((UART_state_bitmap & B_OVERRUN) != 1561 (prev_UART_state_bitmap & B_OVERRUN)) 1562 icount->parity++; 1563 if ((UART_state_bitmap & B_PARITY) != 1564 (prev_UART_state_bitmap & B_PARITY)) 1565 icount->parity++; 1566 if ((UART_state_bitmap & B_FRAMING) != 1567 (prev_UART_state_bitmap & B_FRAMING)) 1568 icount->frame++; 1569 if ((UART_state_bitmap & B_RING_SIGNAL) && 1570 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1571 icount->rng++; 1572 if ((UART_state_bitmap & B_BREAK) != 1573 (prev_UART_state_bitmap & B_BREAK)) 1574 icount->brk++; 1575 if ((UART_state_bitmap & B_TX_CARRIER) != 1576 (prev_UART_state_bitmap & B_TX_CARRIER)) 1577 icount->dsr++; 1578 if ((UART_state_bitmap & B_RX_CARRIER) != 1579 (prev_UART_state_bitmap & B_RX_CARRIER)) 1580 icount->dcd++; 1581 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1582 spin_unlock(&serial->serial_lock); 1583 tiocmget->intr_completed = 1; 1584 wake_up_interruptible(&tiocmget->waitq); 1585 } 1586 memset(serial_state_notification, 0, 1587 sizeof(struct hso_serial_state_notification)); 1588 tiocmget_submit_urb(serial, 1589 tiocmget, 1590 serial->parent->usb); 1591 } 1592 1593 /* 1594 * next few functions largely stolen from drivers/serial/serial_core.c 1595 */ 1596 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1597 * - mask passed in arg for lines of interest 1598 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1599 * Caller should use TIOCGICOUNT to see which one it was 1600 */ 1601 static int 1602 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1603 { 1604 DECLARE_WAITQUEUE(wait, current); 1605 struct uart_icount cprev, cnow; 1606 struct hso_tiocmget *tiocmget; 1607 int ret; 1608 1609 tiocmget = serial->tiocmget; 1610 if (!tiocmget) 1611 return -ENOENT; 1612 /* 1613 * note the counters on entry 1614 */ 1615 spin_lock_irq(&serial->serial_lock); 1616 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1617 spin_unlock_irq(&serial->serial_lock); 1618 add_wait_queue(&tiocmget->waitq, &wait); 1619 for (;;) { 1620 spin_lock_irq(&serial->serial_lock); 1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1622 spin_unlock_irq(&serial->serial_lock); 1623 set_current_state(TASK_INTERRUPTIBLE); 1624 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1625 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1626 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1627 ret = 0; 1628 break; 1629 } 1630 schedule(); 1631 /* see if a signal did it */ 1632 if (signal_pending(current)) { 1633 ret = -ERESTARTSYS; 1634 break; 1635 } 1636 cprev = cnow; 1637 } 1638 current->state = TASK_RUNNING; 1639 remove_wait_queue(&tiocmget->waitq, &wait); 1640 1641 return ret; 1642 } 1643 1644 /* 1645 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1646 * Return: write counters to the user passed counter struct 1647 * NB: both 1->0 and 0->1 transitions are counted except for 1648 * RI where only 0->1 is counted. 1649 */ 1650 static int hso_get_count(struct hso_serial *serial, 1651 struct serial_icounter_struct __user *icnt) 1652 { 1653 struct serial_icounter_struct icount; 1654 struct uart_icount cnow; 1655 struct hso_tiocmget *tiocmget = serial->tiocmget; 1656 1657 if (!tiocmget) 1658 return -ENOENT; 1659 spin_lock_irq(&serial->serial_lock); 1660 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1661 spin_unlock_irq(&serial->serial_lock); 1662 1663 icount.cts = cnow.cts; 1664 icount.dsr = cnow.dsr; 1665 icount.rng = cnow.rng; 1666 icount.dcd = cnow.dcd; 1667 icount.rx = cnow.rx; 1668 icount.tx = cnow.tx; 1669 icount.frame = cnow.frame; 1670 icount.overrun = cnow.overrun; 1671 icount.parity = cnow.parity; 1672 icount.brk = cnow.brk; 1673 icount.buf_overrun = cnow.buf_overrun; 1674 1675 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1676 } 1677 1678 1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1680 { 1681 int retval; 1682 struct hso_serial *serial = get_serial_by_tty(tty); 1683 struct hso_tiocmget *tiocmget; 1684 u16 UART_state_bitmap; 1685 1686 /* sanity check */ 1687 if (!serial) { 1688 D1("no tty structures"); 1689 return -EINVAL; 1690 } 1691 spin_lock_irq(&serial->serial_lock); 1692 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1693 ((serial->dtr_state) ? TIOCM_DTR : 0); 1694 tiocmget = serial->tiocmget; 1695 if (tiocmget) { 1696 1697 UART_state_bitmap = le16_to_cpu( 1698 tiocmget->prev_UART_state_bitmap); 1699 if (UART_state_bitmap & B_RING_SIGNAL) 1700 retval |= TIOCM_RNG; 1701 if (UART_state_bitmap & B_RX_CARRIER) 1702 retval |= TIOCM_CD; 1703 if (UART_state_bitmap & B_TX_CARRIER) 1704 retval |= TIOCM_DSR; 1705 } 1706 spin_unlock_irq(&serial->serial_lock); 1707 return retval; 1708 } 1709 1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1711 unsigned int set, unsigned int clear) 1712 { 1713 int val = 0; 1714 unsigned long flags; 1715 int if_num; 1716 struct hso_serial *serial = get_serial_by_tty(tty); 1717 1718 /* sanity check */ 1719 if (!serial) { 1720 D1("no tty structures"); 1721 return -EINVAL; 1722 } 1723 1724 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1725 return -EINVAL; 1726 1727 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1728 1729 spin_lock_irqsave(&serial->serial_lock, flags); 1730 if (set & TIOCM_RTS) 1731 serial->rts_state = 1; 1732 if (set & TIOCM_DTR) 1733 serial->dtr_state = 1; 1734 1735 if (clear & TIOCM_RTS) 1736 serial->rts_state = 0; 1737 if (clear & TIOCM_DTR) 1738 serial->dtr_state = 0; 1739 1740 if (serial->dtr_state) 1741 val |= 0x01; 1742 if (serial->rts_state) 1743 val |= 0x02; 1744 1745 spin_unlock_irqrestore(&serial->serial_lock, flags); 1746 1747 return usb_control_msg(serial->parent->usb, 1748 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1749 0x21, val, if_num, NULL, 0, 1750 USB_CTRL_SET_TIMEOUT); 1751 } 1752 1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1754 unsigned int cmd, unsigned long arg) 1755 { 1756 struct hso_serial *serial = get_serial_by_tty(tty); 1757 void __user *uarg = (void __user *)arg; 1758 int ret = 0; 1759 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1760 1761 if (!serial) 1762 return -ENODEV; 1763 switch (cmd) { 1764 case TIOCMIWAIT: 1765 ret = hso_wait_modem_status(serial, arg); 1766 break; 1767 1768 case TIOCGICOUNT: 1769 ret = hso_get_count(serial, uarg); 1770 break; 1771 default: 1772 ret = -ENOIOCTLCMD; 1773 break; 1774 } 1775 return ret; 1776 } 1777 1778 1779 /* starts a transmit */ 1780 static void hso_kick_transmit(struct hso_serial *serial) 1781 { 1782 u8 *temp; 1783 unsigned long flags; 1784 int res; 1785 1786 spin_lock_irqsave(&serial->serial_lock, flags); 1787 if (!serial->tx_buffer_count) 1788 goto out; 1789 1790 if (serial->tx_urb_used) 1791 goto out; 1792 1793 /* Wakeup USB interface if necessary */ 1794 if (hso_get_activity(serial->parent) == -EAGAIN) 1795 goto out; 1796 1797 /* Switch pointers around to avoid memcpy */ 1798 temp = serial->tx_buffer; 1799 serial->tx_buffer = serial->tx_data; 1800 serial->tx_data = temp; 1801 serial->tx_data_count = serial->tx_buffer_count; 1802 serial->tx_buffer_count = 0; 1803 1804 /* If temp is set, it means we switched buffers */ 1805 if (temp && serial->write_data) { 1806 res = serial->write_data(serial); 1807 if (res >= 0) 1808 serial->tx_urb_used = 1; 1809 } 1810 out: 1811 spin_unlock_irqrestore(&serial->serial_lock, flags); 1812 } 1813 1814 /* make a request (for reading and writing data to muxed serial port) */ 1815 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1816 struct urb *ctrl_urb, 1817 struct usb_ctrlrequest *ctrl_req, 1818 u8 *ctrl_urb_data, u32 size) 1819 { 1820 int result; 1821 int pipe; 1822 1823 /* Sanity check */ 1824 if (!serial || !ctrl_urb || !ctrl_req) { 1825 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1826 return -EINVAL; 1827 } 1828 1829 /* initialize */ 1830 ctrl_req->wValue = 0; 1831 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1832 ctrl_req->wLength = cpu_to_le16(size); 1833 1834 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1835 /* Reading command */ 1836 ctrl_req->bRequestType = USB_DIR_IN | 1837 USB_TYPE_OPTION_VENDOR | 1838 USB_RECIP_INTERFACE; 1839 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1840 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1841 } else { 1842 /* Writing command */ 1843 ctrl_req->bRequestType = USB_DIR_OUT | 1844 USB_TYPE_OPTION_VENDOR | 1845 USB_RECIP_INTERFACE; 1846 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1847 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1848 } 1849 /* syslog */ 1850 D2("%s command (%02x) len: %d, port: %d", 1851 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1852 ctrl_req->bRequestType, ctrl_req->wLength, port); 1853 1854 /* Load ctrl urb */ 1855 ctrl_urb->transfer_flags = 0; 1856 usb_fill_control_urb(ctrl_urb, 1857 serial->parent->usb, 1858 pipe, 1859 (u8 *) ctrl_req, 1860 ctrl_urb_data, size, ctrl_callback, serial); 1861 /* Send it on merry way */ 1862 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1863 if (result) { 1864 dev_err(&ctrl_urb->dev->dev, 1865 "%s failed submit ctrl_urb %d type %d\n", __func__, 1866 result, type); 1867 return result; 1868 } 1869 1870 /* done */ 1871 return size; 1872 } 1873 1874 /* called by intr_callback when read occurs */ 1875 static int hso_mux_serial_read(struct hso_serial *serial) 1876 { 1877 if (!serial) 1878 return -EINVAL; 1879 1880 /* clean data */ 1881 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1882 /* make the request */ 1883 1884 if (serial->num_rx_urbs != 1) { 1885 dev_err(&serial->parent->interface->dev, 1886 "ERROR: mux'd reads with multiple buffers " 1887 "not possible\n"); 1888 return 0; 1889 } 1890 return mux_device_request(serial, 1891 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1892 serial->parent->port_spec & HSO_PORT_MASK, 1893 serial->rx_urb[0], 1894 &serial->ctrl_req_rx, 1895 serial->rx_data[0], serial->rx_data_length); 1896 } 1897 1898 /* used for muxed serial port callback (muxed serial read) */ 1899 static void intr_callback(struct urb *urb) 1900 { 1901 struct hso_shared_int *shared_int = urb->context; 1902 struct hso_serial *serial; 1903 unsigned char *port_req; 1904 int status = urb->status; 1905 int i; 1906 1907 usb_mark_last_busy(urb->dev); 1908 1909 /* sanity check */ 1910 if (!shared_int) 1911 return; 1912 1913 /* status check */ 1914 if (status) { 1915 handle_usb_error(status, __func__, NULL); 1916 return; 1917 } 1918 D4("\n--- Got intr callback 0x%02X ---", status); 1919 1920 /* what request? */ 1921 port_req = urb->transfer_buffer; 1922 D4(" port_req = 0x%.2X\n", *port_req); 1923 /* loop over all muxed ports to find the one sending this */ 1924 for (i = 0; i < 8; i++) { 1925 /* max 8 channels on MUX */ 1926 if (*port_req & (1 << i)) { 1927 serial = get_serial_by_shared_int_and_type(shared_int, 1928 (1 << i)); 1929 if (serial != NULL) { 1930 D1("Pending read interrupt on port %d\n", i); 1931 spin_lock(&serial->serial_lock); 1932 if (serial->rx_state == RX_IDLE && 1933 serial->open_count > 0) { 1934 /* Setup and send a ctrl req read on 1935 * port i */ 1936 if (!serial->rx_urb_filled[0]) { 1937 serial->rx_state = RX_SENT; 1938 hso_mux_serial_read(serial); 1939 } else 1940 serial->rx_state = RX_PENDING; 1941 } else { 1942 D1("Already a read pending on " 1943 "port %d or port not open\n", i); 1944 } 1945 spin_unlock(&serial->serial_lock); 1946 } 1947 } 1948 } 1949 /* Resubmit interrupt urb */ 1950 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1951 } 1952 1953 /* called for writing to muxed serial port */ 1954 static int hso_mux_serial_write_data(struct hso_serial *serial) 1955 { 1956 if (NULL == serial) 1957 return -EINVAL; 1958 1959 return mux_device_request(serial, 1960 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1961 serial->parent->port_spec & HSO_PORT_MASK, 1962 serial->tx_urb, 1963 &serial->ctrl_req_tx, 1964 serial->tx_data, serial->tx_data_count); 1965 } 1966 1967 /* write callback for Diag and CS port */ 1968 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1969 { 1970 struct hso_serial *serial = urb->context; 1971 int status = urb->status; 1972 struct tty_struct *tty; 1973 1974 /* sanity check */ 1975 if (!serial) { 1976 D1("serial == NULL"); 1977 return; 1978 } 1979 1980 spin_lock(&serial->serial_lock); 1981 serial->tx_urb_used = 0; 1982 tty = tty_kref_get(serial->tty); 1983 spin_unlock(&serial->serial_lock); 1984 if (status) { 1985 handle_usb_error(status, __func__, serial->parent); 1986 tty_kref_put(tty); 1987 return; 1988 } 1989 hso_put_activity(serial->parent); 1990 if (tty) { 1991 tty_wakeup(tty); 1992 tty_kref_put(tty); 1993 } 1994 hso_kick_transmit(serial); 1995 1996 D1(" "); 1997 return; 1998 } 1999 2000 /* called for writing diag or CS serial port */ 2001 static int hso_std_serial_write_data(struct hso_serial *serial) 2002 { 2003 int count = serial->tx_data_count; 2004 int result; 2005 2006 usb_fill_bulk_urb(serial->tx_urb, 2007 serial->parent->usb, 2008 usb_sndbulkpipe(serial->parent->usb, 2009 serial->out_endp-> 2010 bEndpointAddress & 0x7F), 2011 serial->tx_data, serial->tx_data_count, 2012 hso_std_serial_write_bulk_callback, serial); 2013 2014 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2015 if (result) { 2016 dev_warn(&serial->parent->usb->dev, 2017 "Failed to submit urb - res %d\n", result); 2018 return result; 2019 } 2020 2021 return count; 2022 } 2023 2024 /* callback after read or write on muxed serial port */ 2025 static void ctrl_callback(struct urb *urb) 2026 { 2027 struct hso_serial *serial = urb->context; 2028 struct usb_ctrlrequest *req; 2029 int status = urb->status; 2030 struct tty_struct *tty; 2031 2032 /* sanity check */ 2033 if (!serial) 2034 return; 2035 2036 spin_lock(&serial->serial_lock); 2037 serial->tx_urb_used = 0; 2038 tty = tty_kref_get(serial->tty); 2039 spin_unlock(&serial->serial_lock); 2040 if (status) { 2041 handle_usb_error(status, __func__, serial->parent); 2042 tty_kref_put(tty); 2043 return; 2044 } 2045 2046 /* what request? */ 2047 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2048 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2049 D4("Actual length of urb = %d\n", urb->actual_length); 2050 DUMP1(urb->transfer_buffer, urb->actual_length); 2051 2052 if (req->bRequestType == 2053 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2054 /* response to a read command */ 2055 serial->rx_urb_filled[0] = 1; 2056 spin_lock(&serial->serial_lock); 2057 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2058 spin_unlock(&serial->serial_lock); 2059 } else { 2060 hso_put_activity(serial->parent); 2061 if (tty) 2062 tty_wakeup(tty); 2063 /* response to a write command */ 2064 hso_kick_transmit(serial); 2065 } 2066 tty_kref_put(tty); 2067 } 2068 2069 /* handle RX data for serial port */ 2070 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2071 { 2072 struct tty_struct *tty; 2073 int write_length_remaining = 0; 2074 int curr_write_len; 2075 2076 /* Sanity check */ 2077 if (urb == NULL || serial == NULL) { 2078 D1("serial = NULL"); 2079 return -2; 2080 } 2081 2082 /* All callers to put_rxbuf_data hold serial_lock */ 2083 tty = tty_kref_get(serial->tty); 2084 2085 /* Push data to tty */ 2086 if (tty) { 2087 write_length_remaining = urb->actual_length - 2088 serial->curr_rx_urb_offset; 2089 D1("data to push to tty"); 2090 while (write_length_remaining) { 2091 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2092 tty_kref_put(tty); 2093 return -1; 2094 } 2095 curr_write_len = tty_insert_flip_string 2096 (tty, urb->transfer_buffer + 2097 serial->curr_rx_urb_offset, 2098 write_length_remaining); 2099 serial->curr_rx_urb_offset += curr_write_len; 2100 write_length_remaining -= curr_write_len; 2101 tty_flip_buffer_push(tty); 2102 } 2103 } 2104 if (write_length_remaining == 0) { 2105 serial->curr_rx_urb_offset = 0; 2106 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2107 } 2108 tty_kref_put(tty); 2109 return write_length_remaining; 2110 } 2111 2112 2113 /* Base driver functions */ 2114 2115 static void hso_log_port(struct hso_device *hso_dev) 2116 { 2117 char *port_type; 2118 char port_dev[20]; 2119 2120 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2121 case HSO_PORT_CONTROL: 2122 port_type = "Control"; 2123 break; 2124 case HSO_PORT_APP: 2125 port_type = "Application"; 2126 break; 2127 case HSO_PORT_GPS: 2128 port_type = "GPS"; 2129 break; 2130 case HSO_PORT_GPS_CONTROL: 2131 port_type = "GPS control"; 2132 break; 2133 case HSO_PORT_APP2: 2134 port_type = "Application2"; 2135 break; 2136 case HSO_PORT_PCSC: 2137 port_type = "PCSC"; 2138 break; 2139 case HSO_PORT_DIAG: 2140 port_type = "Diagnostic"; 2141 break; 2142 case HSO_PORT_DIAG2: 2143 port_type = "Diagnostic2"; 2144 break; 2145 case HSO_PORT_MODEM: 2146 port_type = "Modem"; 2147 break; 2148 case HSO_PORT_NETWORK: 2149 port_type = "Network"; 2150 break; 2151 default: 2152 port_type = "Unknown"; 2153 break; 2154 } 2155 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2156 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2157 } else 2158 sprintf(port_dev, "/dev/%s%d", tty_filename, 2159 dev2ser(hso_dev)->minor); 2160 2161 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2162 port_type, port_dev); 2163 } 2164 2165 static int hso_start_net_device(struct hso_device *hso_dev) 2166 { 2167 int i, result = 0; 2168 struct hso_net *hso_net = dev2net(hso_dev); 2169 2170 if (!hso_net) 2171 return -ENODEV; 2172 2173 /* send URBs for all read buffers */ 2174 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2175 2176 /* Prep a receive URB */ 2177 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2178 hso_dev->usb, 2179 usb_rcvbulkpipe(hso_dev->usb, 2180 hso_net->in_endp-> 2181 bEndpointAddress & 0x7F), 2182 hso_net->mux_bulk_rx_buf_pool[i], 2183 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2184 hso_net); 2185 2186 /* Put it out there so the device can send us stuff */ 2187 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2188 GFP_NOIO); 2189 if (result) 2190 dev_warn(&hso_dev->usb->dev, 2191 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2192 i, result); 2193 } 2194 2195 return result; 2196 } 2197 2198 static int hso_stop_net_device(struct hso_device *hso_dev) 2199 { 2200 int i; 2201 struct hso_net *hso_net = dev2net(hso_dev); 2202 2203 if (!hso_net) 2204 return -ENODEV; 2205 2206 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2207 if (hso_net->mux_bulk_rx_urb_pool[i]) 2208 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2209 2210 } 2211 if (hso_net->mux_bulk_tx_urb) 2212 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2213 2214 return 0; 2215 } 2216 2217 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2218 { 2219 int i, result = 0; 2220 struct hso_serial *serial = dev2ser(hso_dev); 2221 2222 if (!serial) 2223 return -ENODEV; 2224 2225 /* If it is not the MUX port fill in and submit a bulk urb (already 2226 * allocated in hso_serial_start) */ 2227 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2228 for (i = 0; i < serial->num_rx_urbs; i++) { 2229 usb_fill_bulk_urb(serial->rx_urb[i], 2230 serial->parent->usb, 2231 usb_rcvbulkpipe(serial->parent->usb, 2232 serial->in_endp-> 2233 bEndpointAddress & 2234 0x7F), 2235 serial->rx_data[i], 2236 serial->rx_data_length, 2237 hso_std_serial_read_bulk_callback, 2238 serial); 2239 result = usb_submit_urb(serial->rx_urb[i], flags); 2240 if (result) { 2241 dev_warn(&serial->parent->usb->dev, 2242 "Failed to submit urb - res %d\n", 2243 result); 2244 break; 2245 } 2246 } 2247 } else { 2248 mutex_lock(&serial->shared_int->shared_int_lock); 2249 if (!serial->shared_int->use_count) { 2250 result = 2251 hso_mux_submit_intr_urb(serial->shared_int, 2252 hso_dev->usb, flags); 2253 } 2254 serial->shared_int->use_count++; 2255 mutex_unlock(&serial->shared_int->shared_int_lock); 2256 } 2257 if (serial->tiocmget) 2258 tiocmget_submit_urb(serial, 2259 serial->tiocmget, 2260 serial->parent->usb); 2261 return result; 2262 } 2263 2264 static int hso_stop_serial_device(struct hso_device *hso_dev) 2265 { 2266 int i; 2267 struct hso_serial *serial = dev2ser(hso_dev); 2268 struct hso_tiocmget *tiocmget; 2269 2270 if (!serial) 2271 return -ENODEV; 2272 2273 for (i = 0; i < serial->num_rx_urbs; i++) { 2274 if (serial->rx_urb[i]) { 2275 usb_kill_urb(serial->rx_urb[i]); 2276 serial->rx_urb_filled[i] = 0; 2277 } 2278 } 2279 serial->curr_rx_urb_idx = 0; 2280 serial->curr_rx_urb_offset = 0; 2281 2282 if (serial->tx_urb) 2283 usb_kill_urb(serial->tx_urb); 2284 2285 if (serial->shared_int) { 2286 mutex_lock(&serial->shared_int->shared_int_lock); 2287 if (serial->shared_int->use_count && 2288 (--serial->shared_int->use_count == 0)) { 2289 struct urb *urb; 2290 2291 urb = serial->shared_int->shared_intr_urb; 2292 if (urb) 2293 usb_kill_urb(urb); 2294 } 2295 mutex_unlock(&serial->shared_int->shared_int_lock); 2296 } 2297 tiocmget = serial->tiocmget; 2298 if (tiocmget) { 2299 wake_up_interruptible(&tiocmget->waitq); 2300 usb_kill_urb(tiocmget->urb); 2301 } 2302 2303 return 0; 2304 } 2305 2306 static void hso_serial_common_free(struct hso_serial *serial) 2307 { 2308 int i; 2309 2310 if (serial->parent->dev) 2311 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2312 2313 tty_unregister_device(tty_drv, serial->minor); 2314 2315 for (i = 0; i < serial->num_rx_urbs; i++) { 2316 /* unlink and free RX URB */ 2317 usb_free_urb(serial->rx_urb[i]); 2318 /* free the RX buffer */ 2319 kfree(serial->rx_data[i]); 2320 } 2321 2322 /* unlink and free TX URB */ 2323 usb_free_urb(serial->tx_urb); 2324 kfree(serial->tx_data); 2325 } 2326 2327 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2328 int rx_size, int tx_size) 2329 { 2330 struct device *dev; 2331 int minor; 2332 int i; 2333 2334 minor = get_free_serial_index(); 2335 if (minor < 0) 2336 goto exit; 2337 2338 /* register our minor number */ 2339 serial->parent->dev = tty_register_device(tty_drv, minor, 2340 &serial->parent->interface->dev); 2341 dev = serial->parent->dev; 2342 dev_set_drvdata(dev, serial->parent); 2343 i = device_create_file(dev, &dev_attr_hsotype); 2344 2345 /* fill in specific data for later use */ 2346 serial->minor = minor; 2347 serial->magic = HSO_SERIAL_MAGIC; 2348 spin_lock_init(&serial->serial_lock); 2349 serial->num_rx_urbs = num_urbs; 2350 2351 /* RX, allocate urb and initialize */ 2352 2353 /* prepare our RX buffer */ 2354 serial->rx_data_length = rx_size; 2355 for (i = 0; i < serial->num_rx_urbs; i++) { 2356 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2357 if (!serial->rx_urb[i]) { 2358 dev_err(dev, "Could not allocate urb?\n"); 2359 goto exit; 2360 } 2361 serial->rx_urb[i]->transfer_buffer = NULL; 2362 serial->rx_urb[i]->transfer_buffer_length = 0; 2363 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2364 GFP_KERNEL); 2365 if (!serial->rx_data[i]) { 2366 dev_err(dev, "%s - Out of memory\n", __func__); 2367 goto exit; 2368 } 2369 } 2370 2371 /* TX, allocate urb and initialize */ 2372 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2373 if (!serial->tx_urb) { 2374 dev_err(dev, "Could not allocate urb?\n"); 2375 goto exit; 2376 } 2377 serial->tx_urb->transfer_buffer = NULL; 2378 serial->tx_urb->transfer_buffer_length = 0; 2379 /* prepare our TX buffer */ 2380 serial->tx_data_count = 0; 2381 serial->tx_buffer_count = 0; 2382 serial->tx_data_length = tx_size; 2383 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2384 if (!serial->tx_data) { 2385 dev_err(dev, "%s - Out of memory\n", __func__); 2386 goto exit; 2387 } 2388 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2389 if (!serial->tx_buffer) { 2390 dev_err(dev, "%s - Out of memory\n", __func__); 2391 goto exit; 2392 } 2393 2394 return 0; 2395 exit: 2396 hso_serial_common_free(serial); 2397 return -1; 2398 } 2399 2400 /* Creates a general hso device */ 2401 static struct hso_device *hso_create_device(struct usb_interface *intf, 2402 int port_spec) 2403 { 2404 struct hso_device *hso_dev; 2405 2406 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2407 if (!hso_dev) 2408 return NULL; 2409 2410 hso_dev->port_spec = port_spec; 2411 hso_dev->usb = interface_to_usbdev(intf); 2412 hso_dev->interface = intf; 2413 kref_init(&hso_dev->ref); 2414 mutex_init(&hso_dev->mutex); 2415 2416 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2417 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2418 INIT_WORK(&hso_dev->reset_device, reset_device); 2419 2420 return hso_dev; 2421 } 2422 2423 /* Removes a network device in the network device table */ 2424 static int remove_net_device(struct hso_device *hso_dev) 2425 { 2426 int i; 2427 2428 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2429 if (network_table[i] == hso_dev) { 2430 network_table[i] = NULL; 2431 break; 2432 } 2433 } 2434 if (i == HSO_MAX_NET_DEVICES) 2435 return -1; 2436 return 0; 2437 } 2438 2439 /* Frees our network device */ 2440 static void hso_free_net_device(struct hso_device *hso_dev) 2441 { 2442 int i; 2443 struct hso_net *hso_net = dev2net(hso_dev); 2444 2445 if (!hso_net) 2446 return; 2447 2448 remove_net_device(hso_net->parent); 2449 2450 if (hso_net->net) { 2451 unregister_netdev(hso_net->net); 2452 free_netdev(hso_net->net); 2453 } 2454 2455 /* start freeing */ 2456 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2457 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2458 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2459 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2460 } 2461 usb_free_urb(hso_net->mux_bulk_tx_urb); 2462 kfree(hso_net->mux_bulk_tx_buf); 2463 hso_net->mux_bulk_tx_buf = NULL; 2464 2465 kfree(hso_dev); 2466 } 2467 2468 static const struct net_device_ops hso_netdev_ops = { 2469 .ndo_open = hso_net_open, 2470 .ndo_stop = hso_net_close, 2471 .ndo_start_xmit = hso_net_start_xmit, 2472 .ndo_tx_timeout = hso_net_tx_timeout, 2473 }; 2474 2475 /* initialize the network interface */ 2476 static void hso_net_init(struct net_device *net) 2477 { 2478 struct hso_net *hso_net = netdev_priv(net); 2479 2480 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2481 2482 /* fill in the other fields */ 2483 net->netdev_ops = &hso_netdev_ops; 2484 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2485 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2486 net->type = ARPHRD_NONE; 2487 net->mtu = DEFAULT_MTU - 14; 2488 net->tx_queue_len = 10; 2489 SET_ETHTOOL_OPS(net, &ops); 2490 2491 /* and initialize the semaphore */ 2492 spin_lock_init(&hso_net->net_lock); 2493 } 2494 2495 /* Adds a network device in the network device table */ 2496 static int add_net_device(struct hso_device *hso_dev) 2497 { 2498 int i; 2499 2500 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2501 if (network_table[i] == NULL) { 2502 network_table[i] = hso_dev; 2503 break; 2504 } 2505 } 2506 if (i == HSO_MAX_NET_DEVICES) 2507 return -1; 2508 return 0; 2509 } 2510 2511 static int hso_rfkill_set_block(void *data, bool blocked) 2512 { 2513 struct hso_device *hso_dev = data; 2514 int enabled = !blocked; 2515 int rv; 2516 2517 mutex_lock(&hso_dev->mutex); 2518 if (hso_dev->usb_gone) 2519 rv = 0; 2520 else 2521 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2522 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2523 USB_CTRL_SET_TIMEOUT); 2524 mutex_unlock(&hso_dev->mutex); 2525 return rv; 2526 } 2527 2528 static const struct rfkill_ops hso_rfkill_ops = { 2529 .set_block = hso_rfkill_set_block, 2530 }; 2531 2532 /* Creates and sets up everything for rfkill */ 2533 static void hso_create_rfkill(struct hso_device *hso_dev, 2534 struct usb_interface *interface) 2535 { 2536 struct hso_net *hso_net = dev2net(hso_dev); 2537 struct device *dev = &hso_net->net->dev; 2538 char *rfkn; 2539 2540 rfkn = kzalloc(20, GFP_KERNEL); 2541 if (!rfkn) 2542 dev_err(dev, "%s - Out of memory\n", __func__); 2543 2544 snprintf(rfkn, 20, "hso-%d", 2545 interface->altsetting->desc.bInterfaceNumber); 2546 2547 hso_net->rfkill = rfkill_alloc(rfkn, 2548 &interface_to_usbdev(interface)->dev, 2549 RFKILL_TYPE_WWAN, 2550 &hso_rfkill_ops, hso_dev); 2551 if (!hso_net->rfkill) { 2552 dev_err(dev, "%s - Out of memory\n", __func__); 2553 kfree(rfkn); 2554 return; 2555 } 2556 if (rfkill_register(hso_net->rfkill) < 0) { 2557 rfkill_destroy(hso_net->rfkill); 2558 kfree(rfkn); 2559 hso_net->rfkill = NULL; 2560 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2561 return; 2562 } 2563 } 2564 2565 static struct device_type hso_type = { 2566 .name = "wwan", 2567 }; 2568 2569 /* Creates our network device */ 2570 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2571 int port_spec) 2572 { 2573 int result, i; 2574 struct net_device *net; 2575 struct hso_net *hso_net; 2576 struct hso_device *hso_dev; 2577 2578 hso_dev = hso_create_device(interface, port_spec); 2579 if (!hso_dev) 2580 return NULL; 2581 2582 /* allocate our network device, then we can put in our private data */ 2583 /* call hso_net_init to do the basic initialization */ 2584 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2585 if (!net) { 2586 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2587 goto exit; 2588 } 2589 2590 hso_net = netdev_priv(net); 2591 2592 hso_dev->port_data.dev_net = hso_net; 2593 hso_net->net = net; 2594 hso_net->parent = hso_dev; 2595 2596 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2597 USB_DIR_IN); 2598 if (!hso_net->in_endp) { 2599 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2600 goto exit; 2601 } 2602 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2603 USB_DIR_OUT); 2604 if (!hso_net->out_endp) { 2605 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2606 goto exit; 2607 } 2608 SET_NETDEV_DEV(net, &interface->dev); 2609 SET_NETDEV_DEVTYPE(net, &hso_type); 2610 2611 /* registering our net device */ 2612 result = register_netdev(net); 2613 if (result) { 2614 dev_err(&interface->dev, "Failed to register device\n"); 2615 goto exit; 2616 } 2617 2618 /* start allocating */ 2619 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2620 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2621 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2622 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2623 goto exit; 2624 } 2625 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2626 GFP_KERNEL); 2627 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2628 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2629 goto exit; 2630 } 2631 } 2632 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2633 if (!hso_net->mux_bulk_tx_urb) { 2634 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2635 goto exit; 2636 } 2637 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2638 if (!hso_net->mux_bulk_tx_buf) { 2639 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2640 goto exit; 2641 } 2642 2643 add_net_device(hso_dev); 2644 2645 hso_log_port(hso_dev); 2646 2647 hso_create_rfkill(hso_dev, interface); 2648 2649 return hso_dev; 2650 exit: 2651 hso_free_net_device(hso_dev); 2652 return NULL; 2653 } 2654 2655 static void hso_free_tiomget(struct hso_serial *serial) 2656 { 2657 struct hso_tiocmget *tiocmget = serial->tiocmget; 2658 if (tiocmget) { 2659 if (tiocmget->urb) { 2660 usb_free_urb(tiocmget->urb); 2661 tiocmget->urb = NULL; 2662 } 2663 serial->tiocmget = NULL; 2664 kfree(tiocmget); 2665 2666 } 2667 } 2668 2669 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2670 static void hso_free_serial_device(struct hso_device *hso_dev) 2671 { 2672 struct hso_serial *serial = dev2ser(hso_dev); 2673 2674 if (!serial) 2675 return; 2676 set_serial_by_index(serial->minor, NULL); 2677 2678 hso_serial_common_free(serial); 2679 2680 if (serial->shared_int) { 2681 mutex_lock(&serial->shared_int->shared_int_lock); 2682 if (--serial->shared_int->ref_count == 0) 2683 hso_free_shared_int(serial->shared_int); 2684 else 2685 mutex_unlock(&serial->shared_int->shared_int_lock); 2686 } 2687 hso_free_tiomget(serial); 2688 kfree(serial); 2689 kfree(hso_dev); 2690 } 2691 2692 /* Creates a bulk AT channel */ 2693 static struct hso_device *hso_create_bulk_serial_device( 2694 struct usb_interface *interface, int port) 2695 { 2696 struct hso_device *hso_dev; 2697 struct hso_serial *serial; 2698 int num_urbs; 2699 struct hso_tiocmget *tiocmget; 2700 2701 hso_dev = hso_create_device(interface, port); 2702 if (!hso_dev) 2703 return NULL; 2704 2705 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2706 if (!serial) 2707 goto exit; 2708 2709 serial->parent = hso_dev; 2710 hso_dev->port_data.dev_serial = serial; 2711 2712 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2713 num_urbs = 2; 2714 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2715 GFP_KERNEL); 2716 /* it isn't going to break our heart if serial->tiocmget 2717 * allocation fails don't bother checking this. 2718 */ 2719 if (serial->tiocmget) { 2720 tiocmget = serial->tiocmget; 2721 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2722 if (tiocmget->urb) { 2723 mutex_init(&tiocmget->mutex); 2724 init_waitqueue_head(&tiocmget->waitq); 2725 tiocmget->endp = hso_get_ep( 2726 interface, 2727 USB_ENDPOINT_XFER_INT, 2728 USB_DIR_IN); 2729 } else 2730 hso_free_tiomget(serial); 2731 } 2732 } 2733 else 2734 num_urbs = 1; 2735 2736 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2737 BULK_URB_TX_SIZE)) 2738 goto exit; 2739 2740 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2741 USB_DIR_IN); 2742 if (!serial->in_endp) { 2743 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2744 goto exit2; 2745 } 2746 2747 if (! 2748 (serial->out_endp = 2749 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2750 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2751 goto exit2; 2752 } 2753 2754 serial->write_data = hso_std_serial_write_data; 2755 2756 /* and record this serial */ 2757 set_serial_by_index(serial->minor, serial); 2758 2759 /* setup the proc dirs and files if needed */ 2760 hso_log_port(hso_dev); 2761 2762 /* done, return it */ 2763 return hso_dev; 2764 2765 exit2: 2766 hso_serial_common_free(serial); 2767 exit: 2768 hso_free_tiomget(serial); 2769 kfree(serial); 2770 kfree(hso_dev); 2771 return NULL; 2772 } 2773 2774 /* Creates a multiplexed AT channel */ 2775 static 2776 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2777 int port, 2778 struct hso_shared_int *mux) 2779 { 2780 struct hso_device *hso_dev; 2781 struct hso_serial *serial; 2782 int port_spec; 2783 2784 port_spec = HSO_INTF_MUX; 2785 port_spec &= ~HSO_PORT_MASK; 2786 2787 port_spec |= hso_mux_to_port(port); 2788 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2789 return NULL; 2790 2791 hso_dev = hso_create_device(interface, port_spec); 2792 if (!hso_dev) 2793 return NULL; 2794 2795 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2796 if (!serial) 2797 goto exit; 2798 2799 hso_dev->port_data.dev_serial = serial; 2800 serial->parent = hso_dev; 2801 2802 if (hso_serial_common_create 2803 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2804 goto exit; 2805 2806 serial->tx_data_length--; 2807 serial->write_data = hso_mux_serial_write_data; 2808 2809 serial->shared_int = mux; 2810 mutex_lock(&serial->shared_int->shared_int_lock); 2811 serial->shared_int->ref_count++; 2812 mutex_unlock(&serial->shared_int->shared_int_lock); 2813 2814 /* and record this serial */ 2815 set_serial_by_index(serial->minor, serial); 2816 2817 /* setup the proc dirs and files if needed */ 2818 hso_log_port(hso_dev); 2819 2820 /* done, return it */ 2821 return hso_dev; 2822 2823 exit: 2824 if (serial) { 2825 tty_unregister_device(tty_drv, serial->minor); 2826 kfree(serial); 2827 } 2828 if (hso_dev) 2829 kfree(hso_dev); 2830 return NULL; 2831 2832 } 2833 2834 static void hso_free_shared_int(struct hso_shared_int *mux) 2835 { 2836 usb_free_urb(mux->shared_intr_urb); 2837 kfree(mux->shared_intr_buf); 2838 mutex_unlock(&mux->shared_int_lock); 2839 kfree(mux); 2840 } 2841 2842 static 2843 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2844 { 2845 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2846 2847 if (!mux) 2848 return NULL; 2849 2850 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2851 USB_DIR_IN); 2852 if (!mux->intr_endp) { 2853 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2854 goto exit; 2855 } 2856 2857 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2858 if (!mux->shared_intr_urb) { 2859 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2860 goto exit; 2861 } 2862 mux->shared_intr_buf = 2863 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2864 GFP_KERNEL); 2865 if (!mux->shared_intr_buf) { 2866 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2867 goto exit; 2868 } 2869 2870 mutex_init(&mux->shared_int_lock); 2871 2872 return mux; 2873 2874 exit: 2875 kfree(mux->shared_intr_buf); 2876 usb_free_urb(mux->shared_intr_urb); 2877 kfree(mux); 2878 return NULL; 2879 } 2880 2881 /* Gets the port spec for a certain interface */ 2882 static int hso_get_config_data(struct usb_interface *interface) 2883 { 2884 struct usb_device *usbdev = interface_to_usbdev(interface); 2885 u8 config_data[17]; 2886 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2887 s32 result; 2888 2889 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2890 0x86, 0xC0, 0, 0, config_data, 17, 2891 USB_CTRL_SET_TIMEOUT) != 0x11) { 2892 return -EIO; 2893 } 2894 2895 switch (config_data[if_num]) { 2896 case 0x0: 2897 result = 0; 2898 break; 2899 case 0x1: 2900 result = HSO_PORT_DIAG; 2901 break; 2902 case 0x2: 2903 result = HSO_PORT_GPS; 2904 break; 2905 case 0x3: 2906 result = HSO_PORT_GPS_CONTROL; 2907 break; 2908 case 0x4: 2909 result = HSO_PORT_APP; 2910 break; 2911 case 0x5: 2912 result = HSO_PORT_APP2; 2913 break; 2914 case 0x6: 2915 result = HSO_PORT_CONTROL; 2916 break; 2917 case 0x7: 2918 result = HSO_PORT_NETWORK; 2919 break; 2920 case 0x8: 2921 result = HSO_PORT_MODEM; 2922 break; 2923 case 0x9: 2924 result = HSO_PORT_MSD; 2925 break; 2926 case 0xa: 2927 result = HSO_PORT_PCSC; 2928 break; 2929 case 0xb: 2930 result = HSO_PORT_VOICE; 2931 break; 2932 default: 2933 result = 0; 2934 } 2935 2936 if (result) 2937 result |= HSO_INTF_BULK; 2938 2939 if (config_data[16] & 0x1) 2940 result |= HSO_INFO_CRC_BUG; 2941 2942 return result; 2943 } 2944 2945 /* called once for each interface upon device insertion */ 2946 static int hso_probe(struct usb_interface *interface, 2947 const struct usb_device_id *id) 2948 { 2949 int mux, i, if_num, port_spec; 2950 unsigned char port_mask; 2951 struct hso_device *hso_dev = NULL; 2952 struct hso_shared_int *shared_int; 2953 struct hso_device *tmp_dev = NULL; 2954 2955 if_num = interface->altsetting->desc.bInterfaceNumber; 2956 2957 /* Get the interface/port specification from either driver_info or from 2958 * the device itself */ 2959 if (id->driver_info) 2960 port_spec = ((u32 *)(id->driver_info))[if_num]; 2961 else 2962 port_spec = hso_get_config_data(interface); 2963 2964 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2965 dev_err(&interface->dev, "Not our interface\n"); 2966 return -ENODEV; 2967 } 2968 /* Check if we need to switch to alt interfaces prior to port 2969 * configuration */ 2970 if (interface->num_altsetting > 1) 2971 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2972 interface->needs_remote_wakeup = 1; 2973 2974 /* Allocate new hso device(s) */ 2975 switch (port_spec & HSO_INTF_MASK) { 2976 case HSO_INTF_MUX: 2977 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2978 /* Create the network device */ 2979 if (!disable_net) { 2980 hso_dev = hso_create_net_device(interface, 2981 port_spec); 2982 if (!hso_dev) 2983 goto exit; 2984 tmp_dev = hso_dev; 2985 } 2986 } 2987 2988 if (hso_get_mux_ports(interface, &port_mask)) 2989 /* TODO: de-allocate everything */ 2990 goto exit; 2991 2992 shared_int = hso_create_shared_int(interface); 2993 if (!shared_int) 2994 goto exit; 2995 2996 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2997 if (port_mask & i) { 2998 hso_dev = hso_create_mux_serial_device( 2999 interface, i, shared_int); 3000 if (!hso_dev) 3001 goto exit; 3002 } 3003 } 3004 3005 if (tmp_dev) 3006 hso_dev = tmp_dev; 3007 break; 3008 3009 case HSO_INTF_BULK: 3010 /* It's a regular bulk interface */ 3011 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 3012 !disable_net) 3013 hso_dev = hso_create_net_device(interface, port_spec); 3014 else 3015 hso_dev = 3016 hso_create_bulk_serial_device(interface, port_spec); 3017 if (!hso_dev) 3018 goto exit; 3019 break; 3020 default: 3021 goto exit; 3022 } 3023 3024 /* save our data pointer in this device */ 3025 usb_set_intfdata(interface, hso_dev); 3026 3027 /* done */ 3028 return 0; 3029 exit: 3030 hso_free_interface(interface); 3031 return -ENODEV; 3032 } 3033 3034 /* device removed, cleaning up */ 3035 static void hso_disconnect(struct usb_interface *interface) 3036 { 3037 hso_free_interface(interface); 3038 3039 /* remove reference of our private data */ 3040 usb_set_intfdata(interface, NULL); 3041 } 3042 3043 static void async_get_intf(struct work_struct *data) 3044 { 3045 struct hso_device *hso_dev = 3046 container_of(data, struct hso_device, async_get_intf); 3047 usb_autopm_get_interface(hso_dev->interface); 3048 } 3049 3050 static void async_put_intf(struct work_struct *data) 3051 { 3052 struct hso_device *hso_dev = 3053 container_of(data, struct hso_device, async_put_intf); 3054 usb_autopm_put_interface(hso_dev->interface); 3055 } 3056 3057 static int hso_get_activity(struct hso_device *hso_dev) 3058 { 3059 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3060 if (!hso_dev->is_active) { 3061 hso_dev->is_active = 1; 3062 schedule_work(&hso_dev->async_get_intf); 3063 } 3064 } 3065 3066 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3067 return -EAGAIN; 3068 3069 usb_mark_last_busy(hso_dev->usb); 3070 3071 return 0; 3072 } 3073 3074 static int hso_put_activity(struct hso_device *hso_dev) 3075 { 3076 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3077 if (hso_dev->is_active) { 3078 hso_dev->is_active = 0; 3079 schedule_work(&hso_dev->async_put_intf); 3080 return -EAGAIN; 3081 } 3082 } 3083 hso_dev->is_active = 0; 3084 return 0; 3085 } 3086 3087 /* called by kernel when we need to suspend device */ 3088 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3089 { 3090 int i, result; 3091 3092 /* Stop all serial ports */ 3093 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3094 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3095 result = hso_stop_serial_device(serial_table[i]); 3096 if (result) 3097 goto out; 3098 } 3099 } 3100 3101 /* Stop all network ports */ 3102 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3103 if (network_table[i] && 3104 (network_table[i]->interface == iface)) { 3105 result = hso_stop_net_device(network_table[i]); 3106 if (result) 3107 goto out; 3108 } 3109 } 3110 3111 out: 3112 return 0; 3113 } 3114 3115 /* called by kernel when we need to resume device */ 3116 static int hso_resume(struct usb_interface *iface) 3117 { 3118 int i, result = 0; 3119 struct hso_net *hso_net; 3120 3121 /* Start all serial ports */ 3122 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3123 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3124 if (dev2ser(serial_table[i])->open_count) { 3125 result = 3126 hso_start_serial_device(serial_table[i], GFP_NOIO); 3127 hso_kick_transmit(dev2ser(serial_table[i])); 3128 if (result) 3129 goto out; 3130 } 3131 } 3132 } 3133 3134 /* Start all network ports */ 3135 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3136 if (network_table[i] && 3137 (network_table[i]->interface == iface)) { 3138 hso_net = dev2net(network_table[i]); 3139 if (hso_net->flags & IFF_UP) { 3140 /* First transmit any lingering data, 3141 then restart the device. */ 3142 if (hso_net->skb_tx_buf) { 3143 dev_dbg(&iface->dev, 3144 "Transmitting" 3145 " lingering data\n"); 3146 hso_net_start_xmit(hso_net->skb_tx_buf, 3147 hso_net->net); 3148 hso_net->skb_tx_buf = NULL; 3149 } 3150 result = hso_start_net_device(network_table[i]); 3151 if (result) 3152 goto out; 3153 } 3154 } 3155 } 3156 3157 out: 3158 return result; 3159 } 3160 3161 static void reset_device(struct work_struct *data) 3162 { 3163 struct hso_device *hso_dev = 3164 container_of(data, struct hso_device, reset_device); 3165 struct usb_device *usb = hso_dev->usb; 3166 int result; 3167 3168 if (hso_dev->usb_gone) { 3169 D1("No reset during disconnect\n"); 3170 } else { 3171 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3172 if (result < 0) 3173 D1("unable to lock device for reset: %d\n", result); 3174 else { 3175 usb_reset_device(usb); 3176 usb_unlock_device(usb); 3177 } 3178 } 3179 } 3180 3181 static void hso_serial_ref_free(struct kref *ref) 3182 { 3183 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3184 3185 hso_free_serial_device(hso_dev); 3186 } 3187 3188 static void hso_free_interface(struct usb_interface *interface) 3189 { 3190 struct hso_serial *hso_dev; 3191 struct tty_struct *tty; 3192 int i; 3193 3194 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3195 if (serial_table[i] && 3196 (serial_table[i]->interface == interface)) { 3197 hso_dev = dev2ser(serial_table[i]); 3198 spin_lock_irq(&hso_dev->serial_lock); 3199 tty = tty_kref_get(hso_dev->tty); 3200 spin_unlock_irq(&hso_dev->serial_lock); 3201 if (tty) 3202 tty_hangup(tty); 3203 mutex_lock(&hso_dev->parent->mutex); 3204 tty_kref_put(tty); 3205 hso_dev->parent->usb_gone = 1; 3206 mutex_unlock(&hso_dev->parent->mutex); 3207 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3208 } 3209 } 3210 3211 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3212 if (network_table[i] && 3213 (network_table[i]->interface == interface)) { 3214 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3215 /* hso_stop_net_device doesn't stop the net queue since 3216 * traffic needs to start it again when suspended */ 3217 netif_stop_queue(dev2net(network_table[i])->net); 3218 hso_stop_net_device(network_table[i]); 3219 cancel_work_sync(&network_table[i]->async_put_intf); 3220 cancel_work_sync(&network_table[i]->async_get_intf); 3221 if (rfk) { 3222 rfkill_unregister(rfk); 3223 rfkill_destroy(rfk); 3224 } 3225 hso_free_net_device(network_table[i]); 3226 } 3227 } 3228 } 3229 3230 /* Helper functions */ 3231 3232 /* Get the endpoint ! */ 3233 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3234 int type, int dir) 3235 { 3236 int i; 3237 struct usb_host_interface *iface = intf->cur_altsetting; 3238 struct usb_endpoint_descriptor *endp; 3239 3240 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3241 endp = &iface->endpoint[i].desc; 3242 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3243 (usb_endpoint_type(endp) == type)) 3244 return endp; 3245 } 3246 3247 return NULL; 3248 } 3249 3250 /* Get the byte that describes which ports are enabled */ 3251 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3252 { 3253 int i; 3254 struct usb_host_interface *iface = intf->cur_altsetting; 3255 3256 if (iface->extralen == 3) { 3257 *ports = iface->extra[2]; 3258 return 0; 3259 } 3260 3261 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3262 if (iface->endpoint[i].extralen == 3) { 3263 *ports = iface->endpoint[i].extra[2]; 3264 return 0; 3265 } 3266 } 3267 3268 return -1; 3269 } 3270 3271 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3272 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3273 struct usb_device *usb, gfp_t gfp) 3274 { 3275 int result; 3276 3277 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3278 usb_rcvintpipe(usb, 3279 shared_int->intr_endp->bEndpointAddress & 0x7F), 3280 shared_int->shared_intr_buf, 3281 1, 3282 intr_callback, shared_int, 3283 shared_int->intr_endp->bInterval); 3284 3285 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3286 if (result) 3287 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3288 result); 3289 3290 return result; 3291 } 3292 3293 /* operations setup of the serial interface */ 3294 static const struct tty_operations hso_serial_ops = { 3295 .open = hso_serial_open, 3296 .close = hso_serial_close, 3297 .write = hso_serial_write, 3298 .write_room = hso_serial_write_room, 3299 .ioctl = hso_serial_ioctl, 3300 .set_termios = hso_serial_set_termios, 3301 .chars_in_buffer = hso_serial_chars_in_buffer, 3302 .tiocmget = hso_serial_tiocmget, 3303 .tiocmset = hso_serial_tiocmset, 3304 .unthrottle = hso_unthrottle 3305 }; 3306 3307 static struct usb_driver hso_driver = { 3308 .name = driver_name, 3309 .probe = hso_probe, 3310 .disconnect = hso_disconnect, 3311 .id_table = hso_ids, 3312 .suspend = hso_suspend, 3313 .resume = hso_resume, 3314 .reset_resume = hso_resume, 3315 .supports_autosuspend = 1, 3316 }; 3317 3318 static int __init hso_init(void) 3319 { 3320 int i; 3321 int result; 3322 3323 /* put it in the log */ 3324 printk(KERN_INFO "hso: %s\n", version); 3325 3326 /* Initialise the serial table semaphore and table */ 3327 spin_lock_init(&serial_table_lock); 3328 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3329 serial_table[i] = NULL; 3330 3331 /* allocate our driver using the proper amount of supported minors */ 3332 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3333 if (!tty_drv) 3334 return -ENOMEM; 3335 3336 /* fill in all needed values */ 3337 tty_drv->magic = TTY_DRIVER_MAGIC; 3338 tty_drv->owner = THIS_MODULE; 3339 tty_drv->driver_name = driver_name; 3340 tty_drv->name = tty_filename; 3341 3342 /* if major number is provided as parameter, use that one */ 3343 if (tty_major) 3344 tty_drv->major = tty_major; 3345 3346 tty_drv->minor_start = 0; 3347 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3348 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3349 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3350 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3351 tty_drv->init_termios = tty_std_termios; 3352 hso_init_termios(&tty_drv->init_termios); 3353 tty_set_operations(tty_drv, &hso_serial_ops); 3354 3355 /* register the tty driver */ 3356 result = tty_register_driver(tty_drv); 3357 if (result) { 3358 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3359 __func__, result); 3360 return result; 3361 } 3362 3363 /* register this module as an usb driver */ 3364 result = usb_register(&hso_driver); 3365 if (result) { 3366 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3367 result); 3368 /* cleanup serial interface */ 3369 tty_unregister_driver(tty_drv); 3370 return result; 3371 } 3372 3373 /* done */ 3374 return 0; 3375 } 3376 3377 static void __exit hso_exit(void) 3378 { 3379 printk(KERN_INFO "hso: unloaded\n"); 3380 3381 tty_unregister_driver(tty_drv); 3382 /* deregister the usb driver */ 3383 usb_deregister(&hso_driver); 3384 } 3385 3386 /* Module definitions */ 3387 module_init(hso_init); 3388 module_exit(hso_exit); 3389 3390 MODULE_AUTHOR(MOD_AUTHOR); 3391 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3392 MODULE_LICENSE(MOD_LICENSE); 3393 MODULE_INFO(Version, DRIVER_VERSION); 3394 3395 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3396 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3397 module_param(debug, int, S_IRUGO | S_IWUSR); 3398 3399 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3400 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3401 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3402 3403 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3404 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3405 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3406