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 MOD_AUTHOR "Option Wireless" 77 #define MOD_DESCRIPTION "USB High Speed Option driver" 78 #define MOD_LICENSE "GPL" 79 80 #define HSO_MAX_NET_DEVICES 10 81 #define HSO__MAX_MTU 2048 82 #define DEFAULT_MTU 1500 83 #define DEFAULT_MRU 1500 84 85 #define CTRL_URB_RX_SIZE 1024 86 #define CTRL_URB_TX_SIZE 64 87 88 #define BULK_URB_RX_SIZE 4096 89 #define BULK_URB_TX_SIZE 8192 90 91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_RX_BUF_COUNT 4 94 #define USB_TYPE_OPTION_VENDOR 0x20 95 96 /* These definitions are used with the struct hso_net flags element */ 97 /* - use *_bit operations on it. (bit indices not values.) */ 98 #define HSO_NET_RUNNING 0 99 100 #define HSO_NET_TX_TIMEOUT (HZ*10) 101 102 #define HSO_SERIAL_MAGIC 0x48534f31 103 104 /* Number of ttys to handle */ 105 #define HSO_SERIAL_TTY_MINORS 256 106 107 #define MAX_RX_URBS 2 108 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 110 { 111 if (tty) 112 return tty->driver_data; 113 return NULL; 114 } 115 116 /*****************************************************************************/ 117 /* Debugging functions */ 118 /*****************************************************************************/ 119 #define D__(lvl_, fmt, arg...) \ 120 do { \ 121 printk(lvl_ "[%d:%s]: " fmt "\n", \ 122 __LINE__, __func__, ## arg); \ 123 } while (0) 124 125 #define D_(lvl, args...) \ 126 do { \ 127 if (lvl & debug) \ 128 D__(KERN_INFO, args); \ 129 } while (0) 130 131 #define D1(args...) D_(0x01, ##args) 132 #define D2(args...) D_(0x02, ##args) 133 #define D3(args...) D_(0x04, ##args) 134 #define D4(args...) D_(0x08, ##args) 135 #define D5(args...) D_(0x10, ##args) 136 137 /*****************************************************************************/ 138 /* Enumerators */ 139 /*****************************************************************************/ 140 enum pkt_parse_state { 141 WAIT_IP, 142 WAIT_DATA, 143 WAIT_SYNC 144 }; 145 146 /*****************************************************************************/ 147 /* Structs */ 148 /*****************************************************************************/ 149 150 struct hso_shared_int { 151 struct usb_endpoint_descriptor *intr_endp; 152 void *shared_intr_buf; 153 struct urb *shared_intr_urb; 154 struct usb_device *usb; 155 int use_count; 156 int ref_count; 157 struct mutex shared_int_lock; 158 }; 159 160 struct hso_net { 161 struct hso_device *parent; 162 struct net_device *net; 163 struct rfkill *rfkill; 164 165 struct usb_endpoint_descriptor *in_endp; 166 struct usb_endpoint_descriptor *out_endp; 167 168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 169 struct urb *mux_bulk_tx_urb; 170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 171 void *mux_bulk_tx_buf; 172 173 struct sk_buff *skb_rx_buf; 174 struct sk_buff *skb_tx_buf; 175 176 enum pkt_parse_state rx_parse_state; 177 spinlock_t net_lock; 178 179 unsigned short rx_buf_size; 180 unsigned short rx_buf_missing; 181 struct iphdr rx_ip_hdr; 182 183 unsigned long flags; 184 }; 185 186 enum rx_ctrl_state{ 187 RX_IDLE, 188 RX_SENT, 189 RX_PENDING 190 }; 191 192 #define BM_REQUEST_TYPE (0xa1) 193 #define B_NOTIFICATION (0x20) 194 #define W_VALUE (0x0) 195 #define W_INDEX (0x2) 196 #define W_LENGTH (0x2) 197 198 #define B_OVERRUN (0x1<<6) 199 #define B_PARITY (0x1<<5) 200 #define B_FRAMING (0x1<<4) 201 #define B_RING_SIGNAL (0x1<<3) 202 #define B_BREAK (0x1<<2) 203 #define B_TX_CARRIER (0x1<<1) 204 #define B_RX_CARRIER (0x1<<0) 205 206 struct hso_serial_state_notification { 207 u8 bmRequestType; 208 u8 bNotification; 209 u16 wValue; 210 u16 wIndex; 211 u16 wLength; 212 u16 UART_state_bitmap; 213 } __packed; 214 215 struct hso_tiocmget { 216 struct mutex mutex; 217 wait_queue_head_t waitq; 218 int intr_completed; 219 struct usb_endpoint_descriptor *endp; 220 struct urb *urb; 221 struct hso_serial_state_notification serial_state_notification; 222 u16 prev_UART_state_bitmap; 223 struct uart_icount icount; 224 }; 225 226 227 struct hso_serial { 228 struct hso_device *parent; 229 int magic; 230 u8 minor; 231 232 struct hso_shared_int *shared_int; 233 234 /* rx/tx urb could be either a bulk urb or a control urb depending 235 on which serial port it is used on. */ 236 struct urb *rx_urb[MAX_RX_URBS]; 237 u8 num_rx_urbs; 238 u8 *rx_data[MAX_RX_URBS]; 239 u16 rx_data_length; /* should contain allocated length */ 240 241 struct urb *tx_urb; 242 u8 *tx_data; 243 u8 *tx_buffer; 244 u16 tx_data_length; /* should contain allocated length */ 245 u16 tx_data_count; 246 u16 tx_buffer_count; 247 struct usb_ctrlrequest ctrl_req_tx; 248 struct usb_ctrlrequest ctrl_req_rx; 249 250 struct usb_endpoint_descriptor *in_endp; 251 struct usb_endpoint_descriptor *out_endp; 252 253 enum rx_ctrl_state rx_state; 254 u8 rts_state; 255 u8 dtr_state; 256 unsigned tx_urb_used:1; 257 258 /* from usb_serial_port */ 259 struct tty_struct *tty; 260 int open_count; 261 spinlock_t serial_lock; 262 263 int (*write_data) (struct hso_serial *serial); 264 struct hso_tiocmget *tiocmget; 265 /* Hacks required to get flow control 266 * working on the serial receive buffers 267 * so as not to drop characters on the floor. 268 */ 269 int curr_rx_urb_idx; 270 u16 curr_rx_urb_offset; 271 u8 rx_urb_filled[MAX_RX_URBS]; 272 struct tasklet_struct unthrottle_tasklet; 273 struct work_struct retry_unthrottle_workqueue; 274 }; 275 276 struct hso_device { 277 union { 278 struct hso_serial *dev_serial; 279 struct hso_net *dev_net; 280 } port_data; 281 282 u32 port_spec; 283 284 u8 is_active; 285 u8 usb_gone; 286 struct work_struct async_get_intf; 287 struct work_struct async_put_intf; 288 struct work_struct reset_device; 289 290 struct usb_device *usb; 291 struct usb_interface *interface; 292 293 struct device *dev; 294 struct kref ref; 295 struct mutex mutex; 296 }; 297 298 /* Type of interface */ 299 #define HSO_INTF_MASK 0xFF00 300 #define HSO_INTF_MUX 0x0100 301 #define HSO_INTF_BULK 0x0200 302 303 /* Type of port */ 304 #define HSO_PORT_MASK 0xFF 305 #define HSO_PORT_NO_PORT 0x0 306 #define HSO_PORT_CONTROL 0x1 307 #define HSO_PORT_APP 0x2 308 #define HSO_PORT_GPS 0x3 309 #define HSO_PORT_PCSC 0x4 310 #define HSO_PORT_APP2 0x5 311 #define HSO_PORT_GPS_CONTROL 0x6 312 #define HSO_PORT_MSD 0x7 313 #define HSO_PORT_VOICE 0x8 314 #define HSO_PORT_DIAG2 0x9 315 #define HSO_PORT_DIAG 0x10 316 #define HSO_PORT_MODEM 0x11 317 #define HSO_PORT_NETWORK 0x12 318 319 /* Additional device info */ 320 #define HSO_INFO_MASK 0xFF000000 321 #define HSO_INFO_CRC_BUG 0x01000000 322 323 /*****************************************************************************/ 324 /* Prototypes */ 325 /*****************************************************************************/ 326 /* Serial driver functions */ 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 328 unsigned int set, unsigned int clear); 329 static void ctrl_callback(struct urb *urb); 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 331 static void hso_kick_transmit(struct hso_serial *serial); 332 /* Helper functions */ 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 334 struct usb_device *usb, gfp_t gfp); 335 static void handle_usb_error(int status, const char *function, 336 struct hso_device *hso_dev); 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 338 int type, int dir); 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 340 static void hso_free_interface(struct usb_interface *intf); 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 342 static int hso_stop_serial_device(struct hso_device *hso_dev); 343 static int hso_start_net_device(struct hso_device *hso_dev); 344 static void hso_free_shared_int(struct hso_shared_int *shared_int); 345 static int hso_stop_net_device(struct hso_device *hso_dev); 346 static void hso_serial_ref_free(struct kref *ref); 347 static void hso_std_serial_read_bulk_callback(struct urb *urb); 348 static int hso_mux_serial_read(struct hso_serial *serial); 349 static void async_get_intf(struct work_struct *data); 350 static void async_put_intf(struct work_struct *data); 351 static int hso_put_activity(struct hso_device *hso_dev); 352 static int hso_get_activity(struct hso_device *hso_dev); 353 static void tiocmget_intr_callback(struct urb *urb); 354 static void reset_device(struct work_struct *data); 355 /*****************************************************************************/ 356 /* Helping functions */ 357 /*****************************************************************************/ 358 359 /* #define DEBUG */ 360 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 362 { 363 return hso_dev->port_data.dev_net; 364 } 365 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 367 { 368 return hso_dev->port_data.dev_serial; 369 } 370 371 /* Debugging functions */ 372 #ifdef DEBUG 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 374 unsigned int len) 375 { 376 static char name[255]; 377 378 sprintf(name, "hso[%d:%s]", line_count, func_name); 379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 380 } 381 382 #define DUMP(buf_, len_) \ 383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 384 385 #define DUMP1(buf_, len_) \ 386 do { \ 387 if (0x01 & debug) \ 388 DUMP(buf_, len_); \ 389 } while (0) 390 #else 391 #define DUMP(buf_, len_) 392 #define DUMP1(buf_, len_) 393 #endif 394 395 /* module parameters */ 396 static int debug; 397 static int tty_major; 398 static int disable_net; 399 400 /* driver info */ 401 static const char driver_name[] = "hso"; 402 static const char tty_filename[] = "ttyHS"; 403 static const char *version = __FILE__ ": " MOD_AUTHOR; 404 /* the usb driver itself (registered in hso_init) */ 405 static struct usb_driver hso_driver; 406 /* serial structures */ 407 static struct tty_driver *tty_drv; 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 410 static spinlock_t serial_table_lock; 411 412 static const s32 default_port_spec[] = { 413 HSO_INTF_MUX | HSO_PORT_NETWORK, 414 HSO_INTF_BULK | HSO_PORT_DIAG, 415 HSO_INTF_BULK | HSO_PORT_MODEM, 416 0 417 }; 418 419 static const s32 icon321_port_spec[] = { 420 HSO_INTF_MUX | HSO_PORT_NETWORK, 421 HSO_INTF_BULK | HSO_PORT_DIAG2, 422 HSO_INTF_BULK | HSO_PORT_MODEM, 423 HSO_INTF_BULK | HSO_PORT_DIAG, 424 0 425 }; 426 427 #define default_port_device(vendor, product) \ 428 USB_DEVICE(vendor, product), \ 429 .driver_info = (kernel_ulong_t)default_port_spec 430 431 #define icon321_port_device(vendor, product) \ 432 USB_DEVICE(vendor, product), \ 433 .driver_info = (kernel_ulong_t)icon321_port_spec 434 435 /* list of devices we support */ 436 static const struct usb_device_id hso_ids[] = { 437 {default_port_device(0x0af0, 0x6711)}, 438 {default_port_device(0x0af0, 0x6731)}, 439 {default_port_device(0x0af0, 0x6751)}, 440 {default_port_device(0x0af0, 0x6771)}, 441 {default_port_device(0x0af0, 0x6791)}, 442 {default_port_device(0x0af0, 0x6811)}, 443 {default_port_device(0x0af0, 0x6911)}, 444 {default_port_device(0x0af0, 0x6951)}, 445 {default_port_device(0x0af0, 0x6971)}, 446 {default_port_device(0x0af0, 0x7011)}, 447 {default_port_device(0x0af0, 0x7031)}, 448 {default_port_device(0x0af0, 0x7051)}, 449 {default_port_device(0x0af0, 0x7071)}, 450 {default_port_device(0x0af0, 0x7111)}, 451 {default_port_device(0x0af0, 0x7211)}, 452 {default_port_device(0x0af0, 0x7251)}, 453 {default_port_device(0x0af0, 0x7271)}, 454 {default_port_device(0x0af0, 0x7311)}, 455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 465 {USB_DEVICE(0x0af0, 0x7701)}, 466 {USB_DEVICE(0x0af0, 0x7706)}, 467 {USB_DEVICE(0x0af0, 0x7801)}, 468 {USB_DEVICE(0x0af0, 0x7901)}, 469 {USB_DEVICE(0x0af0, 0x7A01)}, 470 {USB_DEVICE(0x0af0, 0x7A05)}, 471 {USB_DEVICE(0x0af0, 0x8200)}, 472 {USB_DEVICE(0x0af0, 0x8201)}, 473 {USB_DEVICE(0x0af0, 0x8300)}, 474 {USB_DEVICE(0x0af0, 0x8302)}, 475 {USB_DEVICE(0x0af0, 0x8304)}, 476 {USB_DEVICE(0x0af0, 0x8400)}, 477 {USB_DEVICE(0x0af0, 0x8600)}, 478 {USB_DEVICE(0x0af0, 0x8800)}, 479 {USB_DEVICE(0x0af0, 0x8900)}, 480 {USB_DEVICE(0x0af0, 0x9000)}, 481 {USB_DEVICE(0x0af0, 0xd035)}, 482 {USB_DEVICE(0x0af0, 0xd055)}, 483 {USB_DEVICE(0x0af0, 0xd155)}, 484 {USB_DEVICE(0x0af0, 0xd255)}, 485 {USB_DEVICE(0x0af0, 0xd057)}, 486 {USB_DEVICE(0x0af0, 0xd157)}, 487 {USB_DEVICE(0x0af0, 0xd257)}, 488 {USB_DEVICE(0x0af0, 0xd357)}, 489 {USB_DEVICE(0x0af0, 0xd058)}, 490 {USB_DEVICE(0x0af0, 0xc100)}, 491 {} 492 }; 493 MODULE_DEVICE_TABLE(usb, hso_ids); 494 495 /* Sysfs attribute */ 496 static ssize_t hso_sysfs_show_porttype(struct device *dev, 497 struct device_attribute *attr, 498 char *buf) 499 { 500 struct hso_device *hso_dev = dev_get_drvdata(dev); 501 char *port_name; 502 503 if (!hso_dev) 504 return 0; 505 506 switch (hso_dev->port_spec & HSO_PORT_MASK) { 507 case HSO_PORT_CONTROL: 508 port_name = "Control"; 509 break; 510 case HSO_PORT_APP: 511 port_name = "Application"; 512 break; 513 case HSO_PORT_APP2: 514 port_name = "Application2"; 515 break; 516 case HSO_PORT_GPS: 517 port_name = "GPS"; 518 break; 519 case HSO_PORT_GPS_CONTROL: 520 port_name = "GPS Control"; 521 break; 522 case HSO_PORT_PCSC: 523 port_name = "PCSC"; 524 break; 525 case HSO_PORT_DIAG: 526 port_name = "Diagnostic"; 527 break; 528 case HSO_PORT_DIAG2: 529 port_name = "Diagnostic2"; 530 break; 531 case HSO_PORT_MODEM: 532 port_name = "Modem"; 533 break; 534 case HSO_PORT_NETWORK: 535 port_name = "Network"; 536 break; 537 default: 538 port_name = "Unknown"; 539 break; 540 } 541 542 return sprintf(buf, "%s\n", port_name); 543 } 544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 545 546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 547 { 548 int idx; 549 550 for (idx = 0; idx < serial->num_rx_urbs; idx++) 551 if (serial->rx_urb[idx] == urb) 552 return idx; 553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 554 return -1; 555 } 556 557 /* converts mux value to a port spec value */ 558 static u32 hso_mux_to_port(int mux) 559 { 560 u32 result; 561 562 switch (mux) { 563 case 0x1: 564 result = HSO_PORT_CONTROL; 565 break; 566 case 0x2: 567 result = HSO_PORT_APP; 568 break; 569 case 0x4: 570 result = HSO_PORT_PCSC; 571 break; 572 case 0x8: 573 result = HSO_PORT_GPS; 574 break; 575 case 0x10: 576 result = HSO_PORT_APP2; 577 break; 578 default: 579 result = HSO_PORT_NO_PORT; 580 } 581 return result; 582 } 583 584 /* converts port spec value to a mux value */ 585 static u32 hso_port_to_mux(int port) 586 { 587 u32 result; 588 589 switch (port & HSO_PORT_MASK) { 590 case HSO_PORT_CONTROL: 591 result = 0x0; 592 break; 593 case HSO_PORT_APP: 594 result = 0x1; 595 break; 596 case HSO_PORT_PCSC: 597 result = 0x2; 598 break; 599 case HSO_PORT_GPS: 600 result = 0x3; 601 break; 602 case HSO_PORT_APP2: 603 result = 0x4; 604 break; 605 default: 606 result = 0x0; 607 } 608 return result; 609 } 610 611 static struct hso_serial *get_serial_by_shared_int_and_type( 612 struct hso_shared_int *shared_int, 613 int mux) 614 { 615 int i, port; 616 617 port = hso_mux_to_port(mux); 618 619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 620 if (serial_table[i] && 621 (dev2ser(serial_table[i])->shared_int == shared_int) && 622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 623 return dev2ser(serial_table[i]); 624 } 625 } 626 627 return NULL; 628 } 629 630 static struct hso_serial *get_serial_by_index(unsigned index) 631 { 632 struct hso_serial *serial = NULL; 633 unsigned long flags; 634 635 spin_lock_irqsave(&serial_table_lock, flags); 636 if (serial_table[index]) 637 serial = dev2ser(serial_table[index]); 638 spin_unlock_irqrestore(&serial_table_lock, flags); 639 640 return serial; 641 } 642 643 static int get_free_serial_index(void) 644 { 645 int index; 646 unsigned long flags; 647 648 spin_lock_irqsave(&serial_table_lock, flags); 649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 650 if (serial_table[index] == NULL) { 651 spin_unlock_irqrestore(&serial_table_lock, flags); 652 return index; 653 } 654 } 655 spin_unlock_irqrestore(&serial_table_lock, flags); 656 657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 658 return -1; 659 } 660 661 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 662 { 663 unsigned long flags; 664 665 spin_lock_irqsave(&serial_table_lock, flags); 666 if (serial) 667 serial_table[index] = serial->parent; 668 else 669 serial_table[index] = NULL; 670 spin_unlock_irqrestore(&serial_table_lock, flags); 671 } 672 673 static void handle_usb_error(int status, const char *function, 674 struct hso_device *hso_dev) 675 { 676 char *explanation; 677 678 switch (status) { 679 case -ENODEV: 680 explanation = "no device"; 681 break; 682 case -ENOENT: 683 explanation = "endpoint not enabled"; 684 break; 685 case -EPIPE: 686 explanation = "endpoint stalled"; 687 break; 688 case -ENOSPC: 689 explanation = "not enough bandwidth"; 690 break; 691 case -ESHUTDOWN: 692 explanation = "device disabled"; 693 break; 694 case -EHOSTUNREACH: 695 explanation = "device suspended"; 696 break; 697 case -EINVAL: 698 case -EAGAIN: 699 case -EFBIG: 700 case -EMSGSIZE: 701 explanation = "internal error"; 702 break; 703 case -EILSEQ: 704 case -EPROTO: 705 case -ETIME: 706 case -ETIMEDOUT: 707 explanation = "protocol error"; 708 if (hso_dev) 709 schedule_work(&hso_dev->reset_device); 710 break; 711 default: 712 explanation = "unknown status"; 713 break; 714 } 715 716 /* log a meaningful explanation of an USB status */ 717 D1("%s: received USB status - %s (%d)", function, explanation, status); 718 } 719 720 /* Network interface functions */ 721 722 /* called when net interface is brought up by ifconfig */ 723 static int hso_net_open(struct net_device *net) 724 { 725 struct hso_net *odev = netdev_priv(net); 726 unsigned long flags = 0; 727 728 if (!odev) { 729 dev_err(&net->dev, "No net device !\n"); 730 return -ENODEV; 731 } 732 733 odev->skb_tx_buf = NULL; 734 735 /* setup environment */ 736 spin_lock_irqsave(&odev->net_lock, flags); 737 odev->rx_parse_state = WAIT_IP; 738 odev->rx_buf_size = 0; 739 odev->rx_buf_missing = sizeof(struct iphdr); 740 spin_unlock_irqrestore(&odev->net_lock, flags); 741 742 /* We are up and running. */ 743 set_bit(HSO_NET_RUNNING, &odev->flags); 744 hso_start_net_device(odev->parent); 745 746 /* Tell the kernel we are ready to start receiving from it */ 747 netif_start_queue(net); 748 749 return 0; 750 } 751 752 /* called when interface is brought down by ifconfig */ 753 static int hso_net_close(struct net_device *net) 754 { 755 struct hso_net *odev = netdev_priv(net); 756 757 /* we don't need the queue anymore */ 758 netif_stop_queue(net); 759 /* no longer running */ 760 clear_bit(HSO_NET_RUNNING, &odev->flags); 761 762 hso_stop_net_device(odev->parent); 763 764 /* done */ 765 return 0; 766 } 767 768 /* USB tells is xmit done, we should start the netqueue again */ 769 static void write_bulk_callback(struct urb *urb) 770 { 771 struct hso_net *odev = urb->context; 772 int status = urb->status; 773 774 /* Sanity check */ 775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 777 return; 778 } 779 780 /* Do we still have a valid kernel network device? */ 781 if (!netif_device_present(odev->net)) { 782 dev_err(&urb->dev->dev, "%s: net device not present\n", 783 __func__); 784 return; 785 } 786 787 /* log status, but don't act on it, we don't need to resubmit anything 788 * anyhow */ 789 if (status) 790 handle_usb_error(status, __func__, odev->parent); 791 792 hso_put_activity(odev->parent); 793 794 /* Tell the network interface we are ready for another frame */ 795 netif_wake_queue(odev->net); 796 } 797 798 /* called by kernel when we need to transmit a packet */ 799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 800 struct net_device *net) 801 { 802 struct hso_net *odev = netdev_priv(net); 803 int result; 804 805 /* Tell the kernel, "No more frames 'til we are done with this one." */ 806 netif_stop_queue(net); 807 if (hso_get_activity(odev->parent) == -EAGAIN) { 808 odev->skb_tx_buf = skb; 809 return NETDEV_TX_OK; 810 } 811 812 /* log if asked */ 813 DUMP1(skb->data, skb->len); 814 /* Copy it from kernel memory to OUR memory */ 815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 817 818 /* Fill in the URB for shipping it out. */ 819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 820 odev->parent->usb, 821 usb_sndbulkpipe(odev->parent->usb, 822 odev->out_endp-> 823 bEndpointAddress & 0x7F), 824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 825 odev); 826 827 /* Deal with the Zero Length packet problem, I hope */ 828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 829 830 /* Send the URB on its merry way. */ 831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 832 if (result) { 833 dev_warn(&odev->parent->interface->dev, 834 "failed mux_bulk_tx_urb %d\n", result); 835 net->stats.tx_errors++; 836 netif_start_queue(net); 837 } else { 838 net->stats.tx_packets++; 839 net->stats.tx_bytes += skb->len; 840 } 841 dev_kfree_skb(skb); 842 /* we're done */ 843 return NETDEV_TX_OK; 844 } 845 846 static const struct ethtool_ops ops = { 847 .get_link = ethtool_op_get_link 848 }; 849 850 /* called when a packet did not ack after watchdogtimeout */ 851 static void hso_net_tx_timeout(struct net_device *net) 852 { 853 struct hso_net *odev = netdev_priv(net); 854 855 if (!odev) 856 return; 857 858 /* Tell syslog we are hosed. */ 859 dev_warn(&net->dev, "Tx timed out.\n"); 860 861 /* Tear the waiting frame off the list */ 862 if (odev->mux_bulk_tx_urb && 863 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 864 usb_unlink_urb(odev->mux_bulk_tx_urb); 865 866 /* Update statistics */ 867 net->stats.tx_errors++; 868 } 869 870 /* make a real packet from the received USB buffer */ 871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 872 unsigned int count, unsigned char is_eop) 873 { 874 unsigned short temp_bytes; 875 unsigned short buffer_offset = 0; 876 unsigned short frame_len; 877 unsigned char *tmp_rx_buf; 878 879 /* log if needed */ 880 D1("Rx %d bytes", count); 881 DUMP(ip_pkt, min(128, (int)count)); 882 883 while (count) { 884 switch (odev->rx_parse_state) { 885 case WAIT_IP: 886 /* waiting for IP header. */ 887 /* wanted bytes - size of ip header */ 888 temp_bytes = 889 (count < 890 odev->rx_buf_missing) ? count : odev-> 891 rx_buf_missing; 892 893 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 894 odev->rx_buf_size, ip_pkt + buffer_offset, 895 temp_bytes); 896 897 odev->rx_buf_size += temp_bytes; 898 buffer_offset += temp_bytes; 899 odev->rx_buf_missing -= temp_bytes; 900 count -= temp_bytes; 901 902 if (!odev->rx_buf_missing) { 903 /* header is complete allocate an sk_buffer and 904 * continue to WAIT_DATA */ 905 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 906 907 if ((frame_len > DEFAULT_MRU) || 908 (frame_len < sizeof(struct iphdr))) { 909 dev_err(&odev->net->dev, 910 "Invalid frame (%d) length\n", 911 frame_len); 912 odev->rx_parse_state = WAIT_SYNC; 913 continue; 914 } 915 /* Allocate an sk_buff */ 916 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 917 frame_len); 918 if (!odev->skb_rx_buf) { 919 /* We got no receive buffer. */ 920 D1("could not allocate memory"); 921 odev->rx_parse_state = WAIT_SYNC; 922 return; 923 } 924 925 /* Copy what we got so far. make room for iphdr 926 * after tail. */ 927 tmp_rx_buf = 928 skb_put(odev->skb_rx_buf, 929 sizeof(struct iphdr)); 930 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 931 sizeof(struct iphdr)); 932 933 /* ETH_HLEN */ 934 odev->rx_buf_size = sizeof(struct iphdr); 935 936 /* Filip actually use .tot_len */ 937 odev->rx_buf_missing = 938 frame_len - sizeof(struct iphdr); 939 odev->rx_parse_state = WAIT_DATA; 940 } 941 break; 942 943 case WAIT_DATA: 944 temp_bytes = (count < odev->rx_buf_missing) 945 ? count : odev->rx_buf_missing; 946 947 /* Copy the rest of the bytes that are left in the 948 * buffer into the waiting sk_buf. */ 949 /* Make room for temp_bytes after tail. */ 950 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 951 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 952 953 odev->rx_buf_missing -= temp_bytes; 954 count -= temp_bytes; 955 buffer_offset += temp_bytes; 956 odev->rx_buf_size += temp_bytes; 957 if (!odev->rx_buf_missing) { 958 /* Packet is complete. Inject into stack. */ 959 /* We have IP packet here */ 960 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 961 /* don't check it */ 962 odev->skb_rx_buf->ip_summed = 963 CHECKSUM_UNNECESSARY; 964 965 skb_reset_mac_header(odev->skb_rx_buf); 966 967 /* Ship it off to the kernel */ 968 netif_rx(odev->skb_rx_buf); 969 /* No longer our buffer. */ 970 odev->skb_rx_buf = NULL; 971 972 /* update out statistics */ 973 odev->net->stats.rx_packets++; 974 975 odev->net->stats.rx_bytes += odev->rx_buf_size; 976 977 odev->rx_buf_size = 0; 978 odev->rx_buf_missing = sizeof(struct iphdr); 979 odev->rx_parse_state = WAIT_IP; 980 } 981 break; 982 983 case WAIT_SYNC: 984 D1(" W_S"); 985 count = 0; 986 break; 987 default: 988 D1(" "); 989 count--; 990 break; 991 } 992 } 993 994 /* Recovery mechanism for WAIT_SYNC state. */ 995 if (is_eop) { 996 if (odev->rx_parse_state == WAIT_SYNC) { 997 odev->rx_parse_state = WAIT_IP; 998 odev->rx_buf_size = 0; 999 odev->rx_buf_missing = sizeof(struct iphdr); 1000 } 1001 } 1002 } 1003 1004 /* Moving data from usb to kernel (in interrupt state) */ 1005 static void read_bulk_callback(struct urb *urb) 1006 { 1007 struct hso_net *odev = urb->context; 1008 struct net_device *net; 1009 int result; 1010 int status = urb->status; 1011 1012 /* is al ok? (Filip: Who's Al ?) */ 1013 if (status) { 1014 handle_usb_error(status, __func__, odev->parent); 1015 return; 1016 } 1017 1018 /* Sanity check */ 1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1020 D1("BULK IN callback but driver is not active!"); 1021 return; 1022 } 1023 usb_mark_last_busy(urb->dev); 1024 1025 net = odev->net; 1026 1027 if (!netif_device_present(net)) { 1028 /* Somebody killed our network interface... */ 1029 return; 1030 } 1031 1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1033 u32 rest; 1034 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1035 rest = urb->actual_length % 1036 le16_to_cpu(odev->in_endp->wMaxPacketSize); 1037 if (((rest == 5) || (rest == 6)) && 1038 !memcmp(((u8 *) urb->transfer_buffer) + 1039 urb->actual_length - 4, crc_check, 4)) { 1040 urb->actual_length -= 4; 1041 } 1042 } 1043 1044 /* do we even have a packet? */ 1045 if (urb->actual_length) { 1046 /* Handle the IP stream, add header and push it onto network 1047 * stack if the packet is complete. */ 1048 spin_lock(&odev->net_lock); 1049 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1050 (urb->transfer_buffer_length > 1051 urb->actual_length) ? 1 : 0); 1052 spin_unlock(&odev->net_lock); 1053 } 1054 1055 /* We are done with this URB, resubmit it. Prep the USB to wait for 1056 * another frame. Reuse same as received. */ 1057 usb_fill_bulk_urb(urb, 1058 odev->parent->usb, 1059 usb_rcvbulkpipe(odev->parent->usb, 1060 odev->in_endp-> 1061 bEndpointAddress & 0x7F), 1062 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1063 read_bulk_callback, odev); 1064 1065 /* Give this to the USB subsystem so it can tell us when more data 1066 * arrives. */ 1067 result = usb_submit_urb(urb, GFP_ATOMIC); 1068 if (result) 1069 dev_warn(&odev->parent->interface->dev, 1070 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1071 result); 1072 } 1073 1074 /* Serial driver functions */ 1075 1076 static void hso_init_termios(struct ktermios *termios) 1077 { 1078 /* 1079 * The default requirements for this device are: 1080 */ 1081 termios->c_iflag &= 1082 ~(IGNBRK /* disable ignore break */ 1083 | BRKINT /* disable break causes interrupt */ 1084 | PARMRK /* disable mark parity errors */ 1085 | ISTRIP /* disable clear high bit of input characters */ 1086 | INLCR /* disable translate NL to CR */ 1087 | IGNCR /* disable ignore CR */ 1088 | ICRNL /* disable translate CR to NL */ 1089 | IXON); /* disable enable XON/XOFF flow control */ 1090 1091 /* disable postprocess output characters */ 1092 termios->c_oflag &= ~OPOST; 1093 1094 termios->c_lflag &= 1095 ~(ECHO /* disable echo input characters */ 1096 | ECHONL /* disable echo new line */ 1097 | ICANON /* disable erase, kill, werase, and rprnt 1098 special characters */ 1099 | ISIG /* disable interrupt, quit, and suspend special 1100 characters */ 1101 | IEXTEN); /* disable non-POSIX special characters */ 1102 1103 termios->c_cflag &= 1104 ~(CSIZE /* no size */ 1105 | PARENB /* disable parity bit */ 1106 | CBAUD /* clear current baud rate */ 1107 | CBAUDEX); /* clear current buad rate */ 1108 1109 termios->c_cflag |= CS8; /* character size 8 bits */ 1110 1111 /* baud rate 115200 */ 1112 tty_termios_encode_baud_rate(termios, 115200, 115200); 1113 } 1114 1115 static void _hso_serial_set_termios(struct tty_struct *tty, 1116 struct ktermios *old) 1117 { 1118 struct hso_serial *serial = get_serial_by_tty(tty); 1119 struct ktermios *termios; 1120 1121 if (!serial) { 1122 printk(KERN_ERR "%s: no tty structures", __func__); 1123 return; 1124 } 1125 1126 D4("port %d", serial->minor); 1127 1128 /* 1129 * Fix up unsupported bits 1130 */ 1131 termios = tty->termios; 1132 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1133 1134 termios->c_cflag &= 1135 ~(CSIZE /* no size */ 1136 | PARENB /* disable parity bit */ 1137 | CBAUD /* clear current baud rate */ 1138 | CBAUDEX); /* clear current buad rate */ 1139 1140 termios->c_cflag |= CS8; /* character size 8 bits */ 1141 1142 /* baud rate 115200 */ 1143 tty_encode_baud_rate(tty, 115200, 115200); 1144 } 1145 1146 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1147 { 1148 int result; 1149 /* We are done with this URB, resubmit it. Prep the USB to wait for 1150 * another frame */ 1151 usb_fill_bulk_urb(urb, serial->parent->usb, 1152 usb_rcvbulkpipe(serial->parent->usb, 1153 serial->in_endp-> 1154 bEndpointAddress & 0x7F), 1155 urb->transfer_buffer, serial->rx_data_length, 1156 hso_std_serial_read_bulk_callback, serial); 1157 /* Give this to the USB subsystem so it can tell us when more data 1158 * arrives. */ 1159 result = usb_submit_urb(urb, GFP_ATOMIC); 1160 if (result) { 1161 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1162 __func__, result); 1163 } 1164 } 1165 1166 1167 1168 1169 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1170 { 1171 int count; 1172 struct urb *curr_urb; 1173 1174 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1175 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1176 count = put_rxbuf_data(curr_urb, serial); 1177 if (count == -1) 1178 return; 1179 if (count == 0) { 1180 serial->curr_rx_urb_idx++; 1181 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1182 serial->curr_rx_urb_idx = 0; 1183 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1184 } 1185 } 1186 } 1187 1188 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1189 { 1190 int count = 0; 1191 struct urb *urb; 1192 1193 urb = serial->rx_urb[0]; 1194 if (serial->open_count > 0) { 1195 count = put_rxbuf_data(urb, serial); 1196 if (count == -1) 1197 return; 1198 } 1199 /* Re issue a read as long as we receive data. */ 1200 1201 if (count == 0 && ((urb->actual_length != 0) || 1202 (serial->rx_state == RX_PENDING))) { 1203 serial->rx_state = RX_SENT; 1204 hso_mux_serial_read(serial); 1205 } else 1206 serial->rx_state = RX_IDLE; 1207 } 1208 1209 1210 /* read callback for Diag and CS port */ 1211 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1212 { 1213 struct hso_serial *serial = urb->context; 1214 int status = urb->status; 1215 1216 /* sanity check */ 1217 if (!serial) { 1218 D1("serial == NULL"); 1219 return; 1220 } else if (status) { 1221 handle_usb_error(status, __func__, serial->parent); 1222 return; 1223 } 1224 1225 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1226 D1("Actual length = %d\n", urb->actual_length); 1227 DUMP1(urb->transfer_buffer, urb->actual_length); 1228 1229 /* Anyone listening? */ 1230 if (serial->open_count == 0) 1231 return; 1232 1233 if (status == 0) { 1234 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1235 u32 rest; 1236 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1237 rest = 1238 urb->actual_length % 1239 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1240 if (((rest == 5) || (rest == 6)) && 1241 !memcmp(((u8 *) urb->transfer_buffer) + 1242 urb->actual_length - 4, crc_check, 4)) { 1243 urb->actual_length -= 4; 1244 } 1245 } 1246 /* Valid data, handle RX data */ 1247 spin_lock(&serial->serial_lock); 1248 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1249 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1250 spin_unlock(&serial->serial_lock); 1251 } else if (status == -ENOENT || status == -ECONNRESET) { 1252 /* Unlinked - check for throttled port. */ 1253 D2("Port %d, successfully unlinked urb", serial->minor); 1254 spin_lock(&serial->serial_lock); 1255 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1256 hso_resubmit_rx_bulk_urb(serial, urb); 1257 spin_unlock(&serial->serial_lock); 1258 } else { 1259 D2("Port %d, status = %d for read urb", serial->minor, status); 1260 return; 1261 } 1262 } 1263 1264 /* 1265 * This needs to be a tasklet otherwise we will 1266 * end up recursively calling this function. 1267 */ 1268 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1269 { 1270 unsigned long flags; 1271 1272 spin_lock_irqsave(&serial->serial_lock, flags); 1273 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1274 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1275 else 1276 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1277 spin_unlock_irqrestore(&serial->serial_lock, flags); 1278 } 1279 1280 static void hso_unthrottle(struct tty_struct *tty) 1281 { 1282 struct hso_serial *serial = get_serial_by_tty(tty); 1283 1284 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1285 } 1286 1287 static void hso_unthrottle_workfunc(struct work_struct *work) 1288 { 1289 struct hso_serial *serial = 1290 container_of(work, struct hso_serial, 1291 retry_unthrottle_workqueue); 1292 hso_unthrottle_tasklet(serial); 1293 } 1294 1295 /* open the requested serial port */ 1296 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1297 { 1298 struct hso_serial *serial = get_serial_by_index(tty->index); 1299 int result; 1300 1301 /* sanity check */ 1302 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1303 WARN_ON(1); 1304 tty->driver_data = NULL; 1305 D1("Failed to open port"); 1306 return -ENODEV; 1307 } 1308 1309 mutex_lock(&serial->parent->mutex); 1310 result = usb_autopm_get_interface(serial->parent->interface); 1311 if (result < 0) 1312 goto err_out; 1313 1314 D1("Opening %d", serial->minor); 1315 kref_get(&serial->parent->ref); 1316 1317 /* setup */ 1318 spin_lock_irq(&serial->serial_lock); 1319 tty->driver_data = serial; 1320 tty_kref_put(serial->tty); 1321 serial->tty = tty_kref_get(tty); 1322 spin_unlock_irq(&serial->serial_lock); 1323 1324 /* check for port already opened, if not set the termios */ 1325 serial->open_count++; 1326 if (serial->open_count == 1) { 1327 serial->rx_state = RX_IDLE; 1328 /* Force default termio settings */ 1329 _hso_serial_set_termios(tty, NULL); 1330 tasklet_init(&serial->unthrottle_tasklet, 1331 (void (*)(unsigned long))hso_unthrottle_tasklet, 1332 (unsigned long)serial); 1333 INIT_WORK(&serial->retry_unthrottle_workqueue, 1334 hso_unthrottle_workfunc); 1335 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1336 if (result) { 1337 hso_stop_serial_device(serial->parent); 1338 serial->open_count--; 1339 kref_put(&serial->parent->ref, hso_serial_ref_free); 1340 } 1341 } else { 1342 D1("Port was already open"); 1343 } 1344 1345 usb_autopm_put_interface(serial->parent->interface); 1346 1347 /* done */ 1348 if (result) 1349 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1350 err_out: 1351 mutex_unlock(&serial->parent->mutex); 1352 return result; 1353 } 1354 1355 /* close the requested serial port */ 1356 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1357 { 1358 struct hso_serial *serial = tty->driver_data; 1359 u8 usb_gone; 1360 1361 D1("Closing serial port"); 1362 1363 /* Open failed, no close cleanup required */ 1364 if (serial == NULL) 1365 return; 1366 1367 mutex_lock(&serial->parent->mutex); 1368 usb_gone = serial->parent->usb_gone; 1369 1370 if (!usb_gone) 1371 usb_autopm_get_interface(serial->parent->interface); 1372 1373 /* reset the rts and dtr */ 1374 /* do the actual close */ 1375 serial->open_count--; 1376 1377 if (serial->open_count <= 0) { 1378 serial->open_count = 0; 1379 spin_lock_irq(&serial->serial_lock); 1380 if (serial->tty == tty) { 1381 serial->tty->driver_data = NULL; 1382 serial->tty = NULL; 1383 tty_kref_put(tty); 1384 } 1385 spin_unlock_irq(&serial->serial_lock); 1386 if (!usb_gone) 1387 hso_stop_serial_device(serial->parent); 1388 tasklet_kill(&serial->unthrottle_tasklet); 1389 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1390 } 1391 1392 if (!usb_gone) 1393 usb_autopm_put_interface(serial->parent->interface); 1394 1395 mutex_unlock(&serial->parent->mutex); 1396 1397 kref_put(&serial->parent->ref, hso_serial_ref_free); 1398 } 1399 1400 /* close the requested serial port */ 1401 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1402 int count) 1403 { 1404 struct hso_serial *serial = get_serial_by_tty(tty); 1405 int space, tx_bytes; 1406 unsigned long flags; 1407 1408 /* sanity check */ 1409 if (serial == NULL) { 1410 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1411 return -ENODEV; 1412 } 1413 1414 spin_lock_irqsave(&serial->serial_lock, flags); 1415 1416 space = serial->tx_data_length - serial->tx_buffer_count; 1417 tx_bytes = (count < space) ? count : space; 1418 1419 if (!tx_bytes) 1420 goto out; 1421 1422 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1423 serial->tx_buffer_count += tx_bytes; 1424 1425 out: 1426 spin_unlock_irqrestore(&serial->serial_lock, flags); 1427 1428 hso_kick_transmit(serial); 1429 /* done */ 1430 return tx_bytes; 1431 } 1432 1433 /* how much room is there for writing */ 1434 static int hso_serial_write_room(struct tty_struct *tty) 1435 { 1436 struct hso_serial *serial = get_serial_by_tty(tty); 1437 int room; 1438 unsigned long flags; 1439 1440 spin_lock_irqsave(&serial->serial_lock, flags); 1441 room = serial->tx_data_length - serial->tx_buffer_count; 1442 spin_unlock_irqrestore(&serial->serial_lock, flags); 1443 1444 /* return free room */ 1445 return room; 1446 } 1447 1448 /* setup the term */ 1449 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1450 { 1451 struct hso_serial *serial = get_serial_by_tty(tty); 1452 unsigned long flags; 1453 1454 if (old) 1455 D5("Termios called with: cflags new[%d] - old[%d]", 1456 tty->termios->c_cflag, old->c_cflag); 1457 1458 /* the actual setup */ 1459 spin_lock_irqsave(&serial->serial_lock, flags); 1460 if (serial->open_count) 1461 _hso_serial_set_termios(tty, old); 1462 else 1463 tty->termios = old; 1464 spin_unlock_irqrestore(&serial->serial_lock, flags); 1465 1466 /* done */ 1467 } 1468 1469 /* how many characters in the buffer */ 1470 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1471 { 1472 struct hso_serial *serial = get_serial_by_tty(tty); 1473 int chars; 1474 unsigned long flags; 1475 1476 /* sanity check */ 1477 if (serial == NULL) 1478 return 0; 1479 1480 spin_lock_irqsave(&serial->serial_lock, flags); 1481 chars = serial->tx_buffer_count; 1482 spin_unlock_irqrestore(&serial->serial_lock, flags); 1483 1484 return chars; 1485 } 1486 static int tiocmget_submit_urb(struct hso_serial *serial, 1487 struct hso_tiocmget *tiocmget, 1488 struct usb_device *usb) 1489 { 1490 int result; 1491 1492 if (serial->parent->usb_gone) 1493 return -ENODEV; 1494 usb_fill_int_urb(tiocmget->urb, usb, 1495 usb_rcvintpipe(usb, 1496 tiocmget->endp-> 1497 bEndpointAddress & 0x7F), 1498 &tiocmget->serial_state_notification, 1499 sizeof(struct hso_serial_state_notification), 1500 tiocmget_intr_callback, serial, 1501 tiocmget->endp->bInterval); 1502 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1503 if (result) { 1504 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1505 result); 1506 } 1507 return result; 1508 1509 } 1510 1511 static void tiocmget_intr_callback(struct urb *urb) 1512 { 1513 struct hso_serial *serial = urb->context; 1514 struct hso_tiocmget *tiocmget; 1515 int status = urb->status; 1516 u16 UART_state_bitmap, prev_UART_state_bitmap; 1517 struct uart_icount *icount; 1518 struct hso_serial_state_notification *serial_state_notification; 1519 struct usb_device *usb; 1520 1521 /* Sanity checks */ 1522 if (!serial) 1523 return; 1524 if (status) { 1525 handle_usb_error(status, __func__, serial->parent); 1526 return; 1527 } 1528 tiocmget = serial->tiocmget; 1529 if (!tiocmget) 1530 return; 1531 usb = serial->parent->usb; 1532 serial_state_notification = &tiocmget->serial_state_notification; 1533 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1534 serial_state_notification->bNotification != B_NOTIFICATION || 1535 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1536 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1537 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1538 dev_warn(&usb->dev, 1539 "hso received invalid serial state notification\n"); 1540 DUMP(serial_state_notification, 1541 sizeof(struct hso_serial_state_notification)); 1542 } else { 1543 1544 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1545 UART_state_bitmap); 1546 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1547 icount = &tiocmget->icount; 1548 spin_lock(&serial->serial_lock); 1549 if ((UART_state_bitmap & B_OVERRUN) != 1550 (prev_UART_state_bitmap & B_OVERRUN)) 1551 icount->parity++; 1552 if ((UART_state_bitmap & B_PARITY) != 1553 (prev_UART_state_bitmap & B_PARITY)) 1554 icount->parity++; 1555 if ((UART_state_bitmap & B_FRAMING) != 1556 (prev_UART_state_bitmap & B_FRAMING)) 1557 icount->frame++; 1558 if ((UART_state_bitmap & B_RING_SIGNAL) && 1559 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1560 icount->rng++; 1561 if ((UART_state_bitmap & B_BREAK) != 1562 (prev_UART_state_bitmap & B_BREAK)) 1563 icount->brk++; 1564 if ((UART_state_bitmap & B_TX_CARRIER) != 1565 (prev_UART_state_bitmap & B_TX_CARRIER)) 1566 icount->dsr++; 1567 if ((UART_state_bitmap & B_RX_CARRIER) != 1568 (prev_UART_state_bitmap & B_RX_CARRIER)) 1569 icount->dcd++; 1570 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1571 spin_unlock(&serial->serial_lock); 1572 tiocmget->intr_completed = 1; 1573 wake_up_interruptible(&tiocmget->waitq); 1574 } 1575 memset(serial_state_notification, 0, 1576 sizeof(struct hso_serial_state_notification)); 1577 tiocmget_submit_urb(serial, 1578 tiocmget, 1579 serial->parent->usb); 1580 } 1581 1582 /* 1583 * next few functions largely stolen from drivers/serial/serial_core.c 1584 */ 1585 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1586 * - mask passed in arg for lines of interest 1587 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1588 * Caller should use TIOCGICOUNT to see which one it was 1589 */ 1590 static int 1591 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1592 { 1593 DECLARE_WAITQUEUE(wait, current); 1594 struct uart_icount cprev, cnow; 1595 struct hso_tiocmget *tiocmget; 1596 int ret; 1597 1598 tiocmget = serial->tiocmget; 1599 if (!tiocmget) 1600 return -ENOENT; 1601 /* 1602 * note the counters on entry 1603 */ 1604 spin_lock_irq(&serial->serial_lock); 1605 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1606 spin_unlock_irq(&serial->serial_lock); 1607 add_wait_queue(&tiocmget->waitq, &wait); 1608 for (;;) { 1609 spin_lock_irq(&serial->serial_lock); 1610 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1611 spin_unlock_irq(&serial->serial_lock); 1612 set_current_state(TASK_INTERRUPTIBLE); 1613 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1614 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1615 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1616 ret = 0; 1617 break; 1618 } 1619 schedule(); 1620 /* see if a signal did it */ 1621 if (signal_pending(current)) { 1622 ret = -ERESTARTSYS; 1623 break; 1624 } 1625 cprev = cnow; 1626 } 1627 current->state = TASK_RUNNING; 1628 remove_wait_queue(&tiocmget->waitq, &wait); 1629 1630 return ret; 1631 } 1632 1633 /* 1634 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1635 * Return: write counters to the user passed counter struct 1636 * NB: both 1->0 and 0->1 transitions are counted except for 1637 * RI where only 0->1 is counted. 1638 */ 1639 static int hso_get_count(struct tty_struct *tty, 1640 struct serial_icounter_struct *icount) 1641 { 1642 struct uart_icount cnow; 1643 struct hso_serial *serial = get_serial_by_tty(tty); 1644 struct hso_tiocmget *tiocmget = serial->tiocmget; 1645 1646 memset(&icount, 0, sizeof(struct serial_icounter_struct)); 1647 1648 if (!tiocmget) 1649 return -ENOENT; 1650 spin_lock_irq(&serial->serial_lock); 1651 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1652 spin_unlock_irq(&serial->serial_lock); 1653 1654 icount->cts = cnow.cts; 1655 icount->dsr = cnow.dsr; 1656 icount->rng = cnow.rng; 1657 icount->dcd = cnow.dcd; 1658 icount->rx = cnow.rx; 1659 icount->tx = cnow.tx; 1660 icount->frame = cnow.frame; 1661 icount->overrun = cnow.overrun; 1662 icount->parity = cnow.parity; 1663 icount->brk = cnow.brk; 1664 icount->buf_overrun = cnow.buf_overrun; 1665 1666 return 0; 1667 } 1668 1669 1670 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1671 { 1672 int retval; 1673 struct hso_serial *serial = get_serial_by_tty(tty); 1674 struct hso_tiocmget *tiocmget; 1675 u16 UART_state_bitmap; 1676 1677 /* sanity check */ 1678 if (!serial) { 1679 D1("no tty structures"); 1680 return -EINVAL; 1681 } 1682 spin_lock_irq(&serial->serial_lock); 1683 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1684 ((serial->dtr_state) ? TIOCM_DTR : 0); 1685 tiocmget = serial->tiocmget; 1686 if (tiocmget) { 1687 1688 UART_state_bitmap = le16_to_cpu( 1689 tiocmget->prev_UART_state_bitmap); 1690 if (UART_state_bitmap & B_RING_SIGNAL) 1691 retval |= TIOCM_RNG; 1692 if (UART_state_bitmap & B_RX_CARRIER) 1693 retval |= TIOCM_CD; 1694 if (UART_state_bitmap & B_TX_CARRIER) 1695 retval |= TIOCM_DSR; 1696 } 1697 spin_unlock_irq(&serial->serial_lock); 1698 return retval; 1699 } 1700 1701 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1702 unsigned int set, unsigned int clear) 1703 { 1704 int val = 0; 1705 unsigned long flags; 1706 int if_num; 1707 struct hso_serial *serial = get_serial_by_tty(tty); 1708 1709 /* sanity check */ 1710 if (!serial) { 1711 D1("no tty structures"); 1712 return -EINVAL; 1713 } 1714 1715 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1716 return -EINVAL; 1717 1718 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1719 1720 spin_lock_irqsave(&serial->serial_lock, flags); 1721 if (set & TIOCM_RTS) 1722 serial->rts_state = 1; 1723 if (set & TIOCM_DTR) 1724 serial->dtr_state = 1; 1725 1726 if (clear & TIOCM_RTS) 1727 serial->rts_state = 0; 1728 if (clear & TIOCM_DTR) 1729 serial->dtr_state = 0; 1730 1731 if (serial->dtr_state) 1732 val |= 0x01; 1733 if (serial->rts_state) 1734 val |= 0x02; 1735 1736 spin_unlock_irqrestore(&serial->serial_lock, flags); 1737 1738 return usb_control_msg(serial->parent->usb, 1739 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1740 0x21, val, if_num, NULL, 0, 1741 USB_CTRL_SET_TIMEOUT); 1742 } 1743 1744 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1745 unsigned int cmd, unsigned long arg) 1746 { 1747 struct hso_serial *serial = get_serial_by_tty(tty); 1748 void __user *uarg = (void __user *)arg; 1749 int ret = 0; 1750 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1751 1752 if (!serial) 1753 return -ENODEV; 1754 switch (cmd) { 1755 case TIOCMIWAIT: 1756 ret = hso_wait_modem_status(serial, arg); 1757 break; 1758 default: 1759 ret = -ENOIOCTLCMD; 1760 break; 1761 } 1762 return ret; 1763 } 1764 1765 1766 /* starts a transmit */ 1767 static void hso_kick_transmit(struct hso_serial *serial) 1768 { 1769 u8 *temp; 1770 unsigned long flags; 1771 int res; 1772 1773 spin_lock_irqsave(&serial->serial_lock, flags); 1774 if (!serial->tx_buffer_count) 1775 goto out; 1776 1777 if (serial->tx_urb_used) 1778 goto out; 1779 1780 /* Wakeup USB interface if necessary */ 1781 if (hso_get_activity(serial->parent) == -EAGAIN) 1782 goto out; 1783 1784 /* Switch pointers around to avoid memcpy */ 1785 temp = serial->tx_buffer; 1786 serial->tx_buffer = serial->tx_data; 1787 serial->tx_data = temp; 1788 serial->tx_data_count = serial->tx_buffer_count; 1789 serial->tx_buffer_count = 0; 1790 1791 /* If temp is set, it means we switched buffers */ 1792 if (temp && serial->write_data) { 1793 res = serial->write_data(serial); 1794 if (res >= 0) 1795 serial->tx_urb_used = 1; 1796 } 1797 out: 1798 spin_unlock_irqrestore(&serial->serial_lock, flags); 1799 } 1800 1801 /* make a request (for reading and writing data to muxed serial port) */ 1802 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1803 struct urb *ctrl_urb, 1804 struct usb_ctrlrequest *ctrl_req, 1805 u8 *ctrl_urb_data, u32 size) 1806 { 1807 int result; 1808 int pipe; 1809 1810 /* Sanity check */ 1811 if (!serial || !ctrl_urb || !ctrl_req) { 1812 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1813 return -EINVAL; 1814 } 1815 1816 /* initialize */ 1817 ctrl_req->wValue = 0; 1818 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1819 ctrl_req->wLength = cpu_to_le16(size); 1820 1821 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1822 /* Reading command */ 1823 ctrl_req->bRequestType = USB_DIR_IN | 1824 USB_TYPE_OPTION_VENDOR | 1825 USB_RECIP_INTERFACE; 1826 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1827 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1828 } else { 1829 /* Writing command */ 1830 ctrl_req->bRequestType = USB_DIR_OUT | 1831 USB_TYPE_OPTION_VENDOR | 1832 USB_RECIP_INTERFACE; 1833 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1834 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1835 } 1836 /* syslog */ 1837 D2("%s command (%02x) len: %d, port: %d", 1838 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1839 ctrl_req->bRequestType, ctrl_req->wLength, port); 1840 1841 /* Load ctrl urb */ 1842 ctrl_urb->transfer_flags = 0; 1843 usb_fill_control_urb(ctrl_urb, 1844 serial->parent->usb, 1845 pipe, 1846 (u8 *) ctrl_req, 1847 ctrl_urb_data, size, ctrl_callback, serial); 1848 /* Send it on merry way */ 1849 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1850 if (result) { 1851 dev_err(&ctrl_urb->dev->dev, 1852 "%s failed submit ctrl_urb %d type %d\n", __func__, 1853 result, type); 1854 return result; 1855 } 1856 1857 /* done */ 1858 return size; 1859 } 1860 1861 /* called by intr_callback when read occurs */ 1862 static int hso_mux_serial_read(struct hso_serial *serial) 1863 { 1864 if (!serial) 1865 return -EINVAL; 1866 1867 /* clean data */ 1868 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1869 /* make the request */ 1870 1871 if (serial->num_rx_urbs != 1) { 1872 dev_err(&serial->parent->interface->dev, 1873 "ERROR: mux'd reads with multiple buffers " 1874 "not possible\n"); 1875 return 0; 1876 } 1877 return mux_device_request(serial, 1878 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1879 serial->parent->port_spec & HSO_PORT_MASK, 1880 serial->rx_urb[0], 1881 &serial->ctrl_req_rx, 1882 serial->rx_data[0], serial->rx_data_length); 1883 } 1884 1885 /* used for muxed serial port callback (muxed serial read) */ 1886 static void intr_callback(struct urb *urb) 1887 { 1888 struct hso_shared_int *shared_int = urb->context; 1889 struct hso_serial *serial; 1890 unsigned char *port_req; 1891 int status = urb->status; 1892 int i; 1893 1894 usb_mark_last_busy(urb->dev); 1895 1896 /* sanity check */ 1897 if (!shared_int) 1898 return; 1899 1900 /* status check */ 1901 if (status) { 1902 handle_usb_error(status, __func__, NULL); 1903 return; 1904 } 1905 D4("\n--- Got intr callback 0x%02X ---", status); 1906 1907 /* what request? */ 1908 port_req = urb->transfer_buffer; 1909 D4(" port_req = 0x%.2X\n", *port_req); 1910 /* loop over all muxed ports to find the one sending this */ 1911 for (i = 0; i < 8; i++) { 1912 /* max 8 channels on MUX */ 1913 if (*port_req & (1 << i)) { 1914 serial = get_serial_by_shared_int_and_type(shared_int, 1915 (1 << i)); 1916 if (serial != NULL) { 1917 D1("Pending read interrupt on port %d\n", i); 1918 spin_lock(&serial->serial_lock); 1919 if (serial->rx_state == RX_IDLE && 1920 serial->open_count > 0) { 1921 /* Setup and send a ctrl req read on 1922 * port i */ 1923 if (!serial->rx_urb_filled[0]) { 1924 serial->rx_state = RX_SENT; 1925 hso_mux_serial_read(serial); 1926 } else 1927 serial->rx_state = RX_PENDING; 1928 } else { 1929 D1("Already a read pending on " 1930 "port %d or port not open\n", i); 1931 } 1932 spin_unlock(&serial->serial_lock); 1933 } 1934 } 1935 } 1936 /* Resubmit interrupt urb */ 1937 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1938 } 1939 1940 /* called for writing to muxed serial port */ 1941 static int hso_mux_serial_write_data(struct hso_serial *serial) 1942 { 1943 if (NULL == serial) 1944 return -EINVAL; 1945 1946 return mux_device_request(serial, 1947 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1948 serial->parent->port_spec & HSO_PORT_MASK, 1949 serial->tx_urb, 1950 &serial->ctrl_req_tx, 1951 serial->tx_data, serial->tx_data_count); 1952 } 1953 1954 /* write callback for Diag and CS port */ 1955 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1956 { 1957 struct hso_serial *serial = urb->context; 1958 int status = urb->status; 1959 struct tty_struct *tty; 1960 1961 /* sanity check */ 1962 if (!serial) { 1963 D1("serial == NULL"); 1964 return; 1965 } 1966 1967 spin_lock(&serial->serial_lock); 1968 serial->tx_urb_used = 0; 1969 tty = tty_kref_get(serial->tty); 1970 spin_unlock(&serial->serial_lock); 1971 if (status) { 1972 handle_usb_error(status, __func__, serial->parent); 1973 tty_kref_put(tty); 1974 return; 1975 } 1976 hso_put_activity(serial->parent); 1977 if (tty) { 1978 tty_wakeup(tty); 1979 tty_kref_put(tty); 1980 } 1981 hso_kick_transmit(serial); 1982 1983 D1(" "); 1984 } 1985 1986 /* called for writing diag or CS serial port */ 1987 static int hso_std_serial_write_data(struct hso_serial *serial) 1988 { 1989 int count = serial->tx_data_count; 1990 int result; 1991 1992 usb_fill_bulk_urb(serial->tx_urb, 1993 serial->parent->usb, 1994 usb_sndbulkpipe(serial->parent->usb, 1995 serial->out_endp-> 1996 bEndpointAddress & 0x7F), 1997 serial->tx_data, serial->tx_data_count, 1998 hso_std_serial_write_bulk_callback, serial); 1999 2000 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2001 if (result) { 2002 dev_warn(&serial->parent->usb->dev, 2003 "Failed to submit urb - res %d\n", result); 2004 return result; 2005 } 2006 2007 return count; 2008 } 2009 2010 /* callback after read or write on muxed serial port */ 2011 static void ctrl_callback(struct urb *urb) 2012 { 2013 struct hso_serial *serial = urb->context; 2014 struct usb_ctrlrequest *req; 2015 int status = urb->status; 2016 struct tty_struct *tty; 2017 2018 /* sanity check */ 2019 if (!serial) 2020 return; 2021 2022 spin_lock(&serial->serial_lock); 2023 serial->tx_urb_used = 0; 2024 tty = tty_kref_get(serial->tty); 2025 spin_unlock(&serial->serial_lock); 2026 if (status) { 2027 handle_usb_error(status, __func__, serial->parent); 2028 tty_kref_put(tty); 2029 return; 2030 } 2031 2032 /* what request? */ 2033 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2034 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2035 D4("Actual length of urb = %d\n", urb->actual_length); 2036 DUMP1(urb->transfer_buffer, urb->actual_length); 2037 2038 if (req->bRequestType == 2039 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2040 /* response to a read command */ 2041 serial->rx_urb_filled[0] = 1; 2042 spin_lock(&serial->serial_lock); 2043 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2044 spin_unlock(&serial->serial_lock); 2045 } else { 2046 hso_put_activity(serial->parent); 2047 if (tty) 2048 tty_wakeup(tty); 2049 /* response to a write command */ 2050 hso_kick_transmit(serial); 2051 } 2052 tty_kref_put(tty); 2053 } 2054 2055 /* handle RX data for serial port */ 2056 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2057 { 2058 struct tty_struct *tty; 2059 int write_length_remaining = 0; 2060 int curr_write_len; 2061 2062 /* Sanity check */ 2063 if (urb == NULL || serial == NULL) { 2064 D1("serial = NULL"); 2065 return -2; 2066 } 2067 2068 /* All callers to put_rxbuf_data hold serial_lock */ 2069 tty = tty_kref_get(serial->tty); 2070 2071 /* Push data to tty */ 2072 if (tty) { 2073 write_length_remaining = urb->actual_length - 2074 serial->curr_rx_urb_offset; 2075 D1("data to push to tty"); 2076 while (write_length_remaining) { 2077 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2078 tty_kref_put(tty); 2079 return -1; 2080 } 2081 curr_write_len = tty_insert_flip_string 2082 (tty, urb->transfer_buffer + 2083 serial->curr_rx_urb_offset, 2084 write_length_remaining); 2085 serial->curr_rx_urb_offset += curr_write_len; 2086 write_length_remaining -= curr_write_len; 2087 tty_flip_buffer_push(tty); 2088 } 2089 } 2090 if (write_length_remaining == 0) { 2091 serial->curr_rx_urb_offset = 0; 2092 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2093 } 2094 tty_kref_put(tty); 2095 return write_length_remaining; 2096 } 2097 2098 2099 /* Base driver functions */ 2100 2101 static void hso_log_port(struct hso_device *hso_dev) 2102 { 2103 char *port_type; 2104 char port_dev[20]; 2105 2106 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2107 case HSO_PORT_CONTROL: 2108 port_type = "Control"; 2109 break; 2110 case HSO_PORT_APP: 2111 port_type = "Application"; 2112 break; 2113 case HSO_PORT_GPS: 2114 port_type = "GPS"; 2115 break; 2116 case HSO_PORT_GPS_CONTROL: 2117 port_type = "GPS control"; 2118 break; 2119 case HSO_PORT_APP2: 2120 port_type = "Application2"; 2121 break; 2122 case HSO_PORT_PCSC: 2123 port_type = "PCSC"; 2124 break; 2125 case HSO_PORT_DIAG: 2126 port_type = "Diagnostic"; 2127 break; 2128 case HSO_PORT_DIAG2: 2129 port_type = "Diagnostic2"; 2130 break; 2131 case HSO_PORT_MODEM: 2132 port_type = "Modem"; 2133 break; 2134 case HSO_PORT_NETWORK: 2135 port_type = "Network"; 2136 break; 2137 default: 2138 port_type = "Unknown"; 2139 break; 2140 } 2141 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2142 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2143 } else 2144 sprintf(port_dev, "/dev/%s%d", tty_filename, 2145 dev2ser(hso_dev)->minor); 2146 2147 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2148 port_type, port_dev); 2149 } 2150 2151 static int hso_start_net_device(struct hso_device *hso_dev) 2152 { 2153 int i, result = 0; 2154 struct hso_net *hso_net = dev2net(hso_dev); 2155 2156 if (!hso_net) 2157 return -ENODEV; 2158 2159 /* send URBs for all read buffers */ 2160 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2161 2162 /* Prep a receive URB */ 2163 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2164 hso_dev->usb, 2165 usb_rcvbulkpipe(hso_dev->usb, 2166 hso_net->in_endp-> 2167 bEndpointAddress & 0x7F), 2168 hso_net->mux_bulk_rx_buf_pool[i], 2169 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2170 hso_net); 2171 2172 /* Put it out there so the device can send us stuff */ 2173 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2174 GFP_NOIO); 2175 if (result) 2176 dev_warn(&hso_dev->usb->dev, 2177 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2178 i, result); 2179 } 2180 2181 return result; 2182 } 2183 2184 static int hso_stop_net_device(struct hso_device *hso_dev) 2185 { 2186 int i; 2187 struct hso_net *hso_net = dev2net(hso_dev); 2188 2189 if (!hso_net) 2190 return -ENODEV; 2191 2192 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2193 if (hso_net->mux_bulk_rx_urb_pool[i]) 2194 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2195 2196 } 2197 if (hso_net->mux_bulk_tx_urb) 2198 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2199 2200 return 0; 2201 } 2202 2203 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2204 { 2205 int i, result = 0; 2206 struct hso_serial *serial = dev2ser(hso_dev); 2207 2208 if (!serial) 2209 return -ENODEV; 2210 2211 /* If it is not the MUX port fill in and submit a bulk urb (already 2212 * allocated in hso_serial_start) */ 2213 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2214 for (i = 0; i < serial->num_rx_urbs; i++) { 2215 usb_fill_bulk_urb(serial->rx_urb[i], 2216 serial->parent->usb, 2217 usb_rcvbulkpipe(serial->parent->usb, 2218 serial->in_endp-> 2219 bEndpointAddress & 2220 0x7F), 2221 serial->rx_data[i], 2222 serial->rx_data_length, 2223 hso_std_serial_read_bulk_callback, 2224 serial); 2225 result = usb_submit_urb(serial->rx_urb[i], flags); 2226 if (result) { 2227 dev_warn(&serial->parent->usb->dev, 2228 "Failed to submit urb - res %d\n", 2229 result); 2230 break; 2231 } 2232 } 2233 } else { 2234 mutex_lock(&serial->shared_int->shared_int_lock); 2235 if (!serial->shared_int->use_count) { 2236 result = 2237 hso_mux_submit_intr_urb(serial->shared_int, 2238 hso_dev->usb, flags); 2239 } 2240 serial->shared_int->use_count++; 2241 mutex_unlock(&serial->shared_int->shared_int_lock); 2242 } 2243 if (serial->tiocmget) 2244 tiocmget_submit_urb(serial, 2245 serial->tiocmget, 2246 serial->parent->usb); 2247 return result; 2248 } 2249 2250 static int hso_stop_serial_device(struct hso_device *hso_dev) 2251 { 2252 int i; 2253 struct hso_serial *serial = dev2ser(hso_dev); 2254 struct hso_tiocmget *tiocmget; 2255 2256 if (!serial) 2257 return -ENODEV; 2258 2259 for (i = 0; i < serial->num_rx_urbs; i++) { 2260 if (serial->rx_urb[i]) { 2261 usb_kill_urb(serial->rx_urb[i]); 2262 serial->rx_urb_filled[i] = 0; 2263 } 2264 } 2265 serial->curr_rx_urb_idx = 0; 2266 serial->curr_rx_urb_offset = 0; 2267 2268 if (serial->tx_urb) 2269 usb_kill_urb(serial->tx_urb); 2270 2271 if (serial->shared_int) { 2272 mutex_lock(&serial->shared_int->shared_int_lock); 2273 if (serial->shared_int->use_count && 2274 (--serial->shared_int->use_count == 0)) { 2275 struct urb *urb; 2276 2277 urb = serial->shared_int->shared_intr_urb; 2278 if (urb) 2279 usb_kill_urb(urb); 2280 } 2281 mutex_unlock(&serial->shared_int->shared_int_lock); 2282 } 2283 tiocmget = serial->tiocmget; 2284 if (tiocmget) { 2285 wake_up_interruptible(&tiocmget->waitq); 2286 usb_kill_urb(tiocmget->urb); 2287 } 2288 2289 return 0; 2290 } 2291 2292 static void hso_serial_common_free(struct hso_serial *serial) 2293 { 2294 int i; 2295 2296 if (serial->parent->dev) 2297 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2298 2299 tty_unregister_device(tty_drv, serial->minor); 2300 2301 for (i = 0; i < serial->num_rx_urbs; i++) { 2302 /* unlink and free RX URB */ 2303 usb_free_urb(serial->rx_urb[i]); 2304 /* free the RX buffer */ 2305 kfree(serial->rx_data[i]); 2306 } 2307 2308 /* unlink and free TX URB */ 2309 usb_free_urb(serial->tx_urb); 2310 kfree(serial->tx_data); 2311 } 2312 2313 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2314 int rx_size, int tx_size) 2315 { 2316 struct device *dev; 2317 int minor; 2318 int i; 2319 2320 minor = get_free_serial_index(); 2321 if (minor < 0) 2322 goto exit; 2323 2324 /* register our minor number */ 2325 serial->parent->dev = tty_register_device(tty_drv, minor, 2326 &serial->parent->interface->dev); 2327 dev = serial->parent->dev; 2328 dev_set_drvdata(dev, serial->parent); 2329 i = device_create_file(dev, &dev_attr_hsotype); 2330 2331 /* fill in specific data for later use */ 2332 serial->minor = minor; 2333 serial->magic = HSO_SERIAL_MAGIC; 2334 spin_lock_init(&serial->serial_lock); 2335 serial->num_rx_urbs = num_urbs; 2336 2337 /* RX, allocate urb and initialize */ 2338 2339 /* prepare our RX buffer */ 2340 serial->rx_data_length = rx_size; 2341 for (i = 0; i < serial->num_rx_urbs; i++) { 2342 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2343 if (!serial->rx_urb[i]) { 2344 dev_err(dev, "Could not allocate urb?\n"); 2345 goto exit; 2346 } 2347 serial->rx_urb[i]->transfer_buffer = NULL; 2348 serial->rx_urb[i]->transfer_buffer_length = 0; 2349 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2350 GFP_KERNEL); 2351 if (!serial->rx_data[i]) { 2352 dev_err(dev, "%s - Out of memory\n", __func__); 2353 goto exit; 2354 } 2355 } 2356 2357 /* TX, allocate urb and initialize */ 2358 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2359 if (!serial->tx_urb) { 2360 dev_err(dev, "Could not allocate urb?\n"); 2361 goto exit; 2362 } 2363 serial->tx_urb->transfer_buffer = NULL; 2364 serial->tx_urb->transfer_buffer_length = 0; 2365 /* prepare our TX buffer */ 2366 serial->tx_data_count = 0; 2367 serial->tx_buffer_count = 0; 2368 serial->tx_data_length = tx_size; 2369 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2370 if (!serial->tx_data) { 2371 dev_err(dev, "%s - Out of memory\n", __func__); 2372 goto exit; 2373 } 2374 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2375 if (!serial->tx_buffer) { 2376 dev_err(dev, "%s - Out of memory\n", __func__); 2377 goto exit; 2378 } 2379 2380 return 0; 2381 exit: 2382 hso_serial_common_free(serial); 2383 return -1; 2384 } 2385 2386 /* Creates a general hso device */ 2387 static struct hso_device *hso_create_device(struct usb_interface *intf, 2388 int port_spec) 2389 { 2390 struct hso_device *hso_dev; 2391 2392 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2393 if (!hso_dev) 2394 return NULL; 2395 2396 hso_dev->port_spec = port_spec; 2397 hso_dev->usb = interface_to_usbdev(intf); 2398 hso_dev->interface = intf; 2399 kref_init(&hso_dev->ref); 2400 mutex_init(&hso_dev->mutex); 2401 2402 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2403 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2404 INIT_WORK(&hso_dev->reset_device, reset_device); 2405 2406 return hso_dev; 2407 } 2408 2409 /* Removes a network device in the network device table */ 2410 static int remove_net_device(struct hso_device *hso_dev) 2411 { 2412 int i; 2413 2414 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2415 if (network_table[i] == hso_dev) { 2416 network_table[i] = NULL; 2417 break; 2418 } 2419 } 2420 if (i == HSO_MAX_NET_DEVICES) 2421 return -1; 2422 return 0; 2423 } 2424 2425 /* Frees our network device */ 2426 static void hso_free_net_device(struct hso_device *hso_dev) 2427 { 2428 int i; 2429 struct hso_net *hso_net = dev2net(hso_dev); 2430 2431 if (!hso_net) 2432 return; 2433 2434 remove_net_device(hso_net->parent); 2435 2436 if (hso_net->net) { 2437 unregister_netdev(hso_net->net); 2438 free_netdev(hso_net->net); 2439 } 2440 2441 /* start freeing */ 2442 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2443 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2444 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2445 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2446 } 2447 usb_free_urb(hso_net->mux_bulk_tx_urb); 2448 kfree(hso_net->mux_bulk_tx_buf); 2449 hso_net->mux_bulk_tx_buf = NULL; 2450 2451 kfree(hso_dev); 2452 } 2453 2454 static const struct net_device_ops hso_netdev_ops = { 2455 .ndo_open = hso_net_open, 2456 .ndo_stop = hso_net_close, 2457 .ndo_start_xmit = hso_net_start_xmit, 2458 .ndo_tx_timeout = hso_net_tx_timeout, 2459 }; 2460 2461 /* initialize the network interface */ 2462 static void hso_net_init(struct net_device *net) 2463 { 2464 struct hso_net *hso_net = netdev_priv(net); 2465 2466 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2467 2468 /* fill in the other fields */ 2469 net->netdev_ops = &hso_netdev_ops; 2470 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2471 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2472 net->type = ARPHRD_NONE; 2473 net->mtu = DEFAULT_MTU - 14; 2474 net->tx_queue_len = 10; 2475 SET_ETHTOOL_OPS(net, &ops); 2476 2477 /* and initialize the semaphore */ 2478 spin_lock_init(&hso_net->net_lock); 2479 } 2480 2481 /* Adds a network device in the network device table */ 2482 static int add_net_device(struct hso_device *hso_dev) 2483 { 2484 int i; 2485 2486 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2487 if (network_table[i] == NULL) { 2488 network_table[i] = hso_dev; 2489 break; 2490 } 2491 } 2492 if (i == HSO_MAX_NET_DEVICES) 2493 return -1; 2494 return 0; 2495 } 2496 2497 static int hso_rfkill_set_block(void *data, bool blocked) 2498 { 2499 struct hso_device *hso_dev = data; 2500 int enabled = !blocked; 2501 int rv; 2502 2503 mutex_lock(&hso_dev->mutex); 2504 if (hso_dev->usb_gone) 2505 rv = 0; 2506 else 2507 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2508 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2509 USB_CTRL_SET_TIMEOUT); 2510 mutex_unlock(&hso_dev->mutex); 2511 return rv; 2512 } 2513 2514 static const struct rfkill_ops hso_rfkill_ops = { 2515 .set_block = hso_rfkill_set_block, 2516 }; 2517 2518 /* Creates and sets up everything for rfkill */ 2519 static void hso_create_rfkill(struct hso_device *hso_dev, 2520 struct usb_interface *interface) 2521 { 2522 struct hso_net *hso_net = dev2net(hso_dev); 2523 struct device *dev = &hso_net->net->dev; 2524 char *rfkn; 2525 2526 rfkn = kzalloc(20, GFP_KERNEL); 2527 if (!rfkn) 2528 dev_err(dev, "%s - Out of memory\n", __func__); 2529 2530 snprintf(rfkn, 20, "hso-%d", 2531 interface->altsetting->desc.bInterfaceNumber); 2532 2533 hso_net->rfkill = rfkill_alloc(rfkn, 2534 &interface_to_usbdev(interface)->dev, 2535 RFKILL_TYPE_WWAN, 2536 &hso_rfkill_ops, hso_dev); 2537 if (!hso_net->rfkill) { 2538 dev_err(dev, "%s - Out of memory\n", __func__); 2539 kfree(rfkn); 2540 return; 2541 } 2542 if (rfkill_register(hso_net->rfkill) < 0) { 2543 rfkill_destroy(hso_net->rfkill); 2544 kfree(rfkn); 2545 hso_net->rfkill = NULL; 2546 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2547 return; 2548 } 2549 } 2550 2551 static struct device_type hso_type = { 2552 .name = "wwan", 2553 }; 2554 2555 /* Creates our network device */ 2556 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2557 int port_spec) 2558 { 2559 int result, i; 2560 struct net_device *net; 2561 struct hso_net *hso_net; 2562 struct hso_device *hso_dev; 2563 2564 hso_dev = hso_create_device(interface, port_spec); 2565 if (!hso_dev) 2566 return NULL; 2567 2568 /* allocate our network device, then we can put in our private data */ 2569 /* call hso_net_init to do the basic initialization */ 2570 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2571 if (!net) { 2572 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2573 goto exit; 2574 } 2575 2576 hso_net = netdev_priv(net); 2577 2578 hso_dev->port_data.dev_net = hso_net; 2579 hso_net->net = net; 2580 hso_net->parent = hso_dev; 2581 2582 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2583 USB_DIR_IN); 2584 if (!hso_net->in_endp) { 2585 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2586 goto exit; 2587 } 2588 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2589 USB_DIR_OUT); 2590 if (!hso_net->out_endp) { 2591 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2592 goto exit; 2593 } 2594 SET_NETDEV_DEV(net, &interface->dev); 2595 SET_NETDEV_DEVTYPE(net, &hso_type); 2596 2597 /* registering our net device */ 2598 result = register_netdev(net); 2599 if (result) { 2600 dev_err(&interface->dev, "Failed to register device\n"); 2601 goto exit; 2602 } 2603 2604 /* start allocating */ 2605 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2606 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2607 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2608 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2609 goto exit; 2610 } 2611 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2612 GFP_KERNEL); 2613 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2614 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2615 goto exit; 2616 } 2617 } 2618 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2619 if (!hso_net->mux_bulk_tx_urb) { 2620 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2621 goto exit; 2622 } 2623 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2624 if (!hso_net->mux_bulk_tx_buf) { 2625 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2626 goto exit; 2627 } 2628 2629 add_net_device(hso_dev); 2630 2631 hso_log_port(hso_dev); 2632 2633 hso_create_rfkill(hso_dev, interface); 2634 2635 return hso_dev; 2636 exit: 2637 hso_free_net_device(hso_dev); 2638 return NULL; 2639 } 2640 2641 static void hso_free_tiomget(struct hso_serial *serial) 2642 { 2643 struct hso_tiocmget *tiocmget = serial->tiocmget; 2644 if (tiocmget) { 2645 if (tiocmget->urb) { 2646 usb_free_urb(tiocmget->urb); 2647 tiocmget->urb = NULL; 2648 } 2649 serial->tiocmget = NULL; 2650 kfree(tiocmget); 2651 2652 } 2653 } 2654 2655 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2656 static void hso_free_serial_device(struct hso_device *hso_dev) 2657 { 2658 struct hso_serial *serial = dev2ser(hso_dev); 2659 2660 if (!serial) 2661 return; 2662 set_serial_by_index(serial->minor, NULL); 2663 2664 hso_serial_common_free(serial); 2665 2666 if (serial->shared_int) { 2667 mutex_lock(&serial->shared_int->shared_int_lock); 2668 if (--serial->shared_int->ref_count == 0) 2669 hso_free_shared_int(serial->shared_int); 2670 else 2671 mutex_unlock(&serial->shared_int->shared_int_lock); 2672 } 2673 hso_free_tiomget(serial); 2674 kfree(serial); 2675 kfree(hso_dev); 2676 } 2677 2678 /* Creates a bulk AT channel */ 2679 static struct hso_device *hso_create_bulk_serial_device( 2680 struct usb_interface *interface, int port) 2681 { 2682 struct hso_device *hso_dev; 2683 struct hso_serial *serial; 2684 int num_urbs; 2685 struct hso_tiocmget *tiocmget; 2686 2687 hso_dev = hso_create_device(interface, port); 2688 if (!hso_dev) 2689 return NULL; 2690 2691 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2692 if (!serial) 2693 goto exit; 2694 2695 serial->parent = hso_dev; 2696 hso_dev->port_data.dev_serial = serial; 2697 2698 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2699 num_urbs = 2; 2700 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2701 GFP_KERNEL); 2702 /* it isn't going to break our heart if serial->tiocmget 2703 * allocation fails don't bother checking this. 2704 */ 2705 if (serial->tiocmget) { 2706 tiocmget = serial->tiocmget; 2707 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2708 if (tiocmget->urb) { 2709 mutex_init(&tiocmget->mutex); 2710 init_waitqueue_head(&tiocmget->waitq); 2711 tiocmget->endp = hso_get_ep( 2712 interface, 2713 USB_ENDPOINT_XFER_INT, 2714 USB_DIR_IN); 2715 } else 2716 hso_free_tiomget(serial); 2717 } 2718 } 2719 else 2720 num_urbs = 1; 2721 2722 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2723 BULK_URB_TX_SIZE)) 2724 goto exit; 2725 2726 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2727 USB_DIR_IN); 2728 if (!serial->in_endp) { 2729 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2730 goto exit2; 2731 } 2732 2733 if (! 2734 (serial->out_endp = 2735 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2736 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2737 goto exit2; 2738 } 2739 2740 serial->write_data = hso_std_serial_write_data; 2741 2742 /* and record this serial */ 2743 set_serial_by_index(serial->minor, serial); 2744 2745 /* setup the proc dirs and files if needed */ 2746 hso_log_port(hso_dev); 2747 2748 /* done, return it */ 2749 return hso_dev; 2750 2751 exit2: 2752 hso_serial_common_free(serial); 2753 exit: 2754 hso_free_tiomget(serial); 2755 kfree(serial); 2756 kfree(hso_dev); 2757 return NULL; 2758 } 2759 2760 /* Creates a multiplexed AT channel */ 2761 static 2762 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2763 int port, 2764 struct hso_shared_int *mux) 2765 { 2766 struct hso_device *hso_dev; 2767 struct hso_serial *serial; 2768 int port_spec; 2769 2770 port_spec = HSO_INTF_MUX; 2771 port_spec &= ~HSO_PORT_MASK; 2772 2773 port_spec |= hso_mux_to_port(port); 2774 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2775 return NULL; 2776 2777 hso_dev = hso_create_device(interface, port_spec); 2778 if (!hso_dev) 2779 return NULL; 2780 2781 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2782 if (!serial) 2783 goto exit; 2784 2785 hso_dev->port_data.dev_serial = serial; 2786 serial->parent = hso_dev; 2787 2788 if (hso_serial_common_create 2789 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2790 goto exit; 2791 2792 serial->tx_data_length--; 2793 serial->write_data = hso_mux_serial_write_data; 2794 2795 serial->shared_int = mux; 2796 mutex_lock(&serial->shared_int->shared_int_lock); 2797 serial->shared_int->ref_count++; 2798 mutex_unlock(&serial->shared_int->shared_int_lock); 2799 2800 /* and record this serial */ 2801 set_serial_by_index(serial->minor, serial); 2802 2803 /* setup the proc dirs and files if needed */ 2804 hso_log_port(hso_dev); 2805 2806 /* done, return it */ 2807 return hso_dev; 2808 2809 exit: 2810 if (serial) { 2811 tty_unregister_device(tty_drv, serial->minor); 2812 kfree(serial); 2813 } 2814 if (hso_dev) 2815 kfree(hso_dev); 2816 return NULL; 2817 2818 } 2819 2820 static void hso_free_shared_int(struct hso_shared_int *mux) 2821 { 2822 usb_free_urb(mux->shared_intr_urb); 2823 kfree(mux->shared_intr_buf); 2824 mutex_unlock(&mux->shared_int_lock); 2825 kfree(mux); 2826 } 2827 2828 static 2829 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2830 { 2831 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2832 2833 if (!mux) 2834 return NULL; 2835 2836 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2837 USB_DIR_IN); 2838 if (!mux->intr_endp) { 2839 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2840 goto exit; 2841 } 2842 2843 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2844 if (!mux->shared_intr_urb) { 2845 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2846 goto exit; 2847 } 2848 mux->shared_intr_buf = 2849 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2850 GFP_KERNEL); 2851 if (!mux->shared_intr_buf) { 2852 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2853 goto exit; 2854 } 2855 2856 mutex_init(&mux->shared_int_lock); 2857 2858 return mux; 2859 2860 exit: 2861 kfree(mux->shared_intr_buf); 2862 usb_free_urb(mux->shared_intr_urb); 2863 kfree(mux); 2864 return NULL; 2865 } 2866 2867 /* Gets the port spec for a certain interface */ 2868 static int hso_get_config_data(struct usb_interface *interface) 2869 { 2870 struct usb_device *usbdev = interface_to_usbdev(interface); 2871 u8 config_data[17]; 2872 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2873 s32 result; 2874 2875 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2876 0x86, 0xC0, 0, 0, config_data, 17, 2877 USB_CTRL_SET_TIMEOUT) != 0x11) { 2878 return -EIO; 2879 } 2880 2881 switch (config_data[if_num]) { 2882 case 0x0: 2883 result = 0; 2884 break; 2885 case 0x1: 2886 result = HSO_PORT_DIAG; 2887 break; 2888 case 0x2: 2889 result = HSO_PORT_GPS; 2890 break; 2891 case 0x3: 2892 result = HSO_PORT_GPS_CONTROL; 2893 break; 2894 case 0x4: 2895 result = HSO_PORT_APP; 2896 break; 2897 case 0x5: 2898 result = HSO_PORT_APP2; 2899 break; 2900 case 0x6: 2901 result = HSO_PORT_CONTROL; 2902 break; 2903 case 0x7: 2904 result = HSO_PORT_NETWORK; 2905 break; 2906 case 0x8: 2907 result = HSO_PORT_MODEM; 2908 break; 2909 case 0x9: 2910 result = HSO_PORT_MSD; 2911 break; 2912 case 0xa: 2913 result = HSO_PORT_PCSC; 2914 break; 2915 case 0xb: 2916 result = HSO_PORT_VOICE; 2917 break; 2918 default: 2919 result = 0; 2920 } 2921 2922 if (result) 2923 result |= HSO_INTF_BULK; 2924 2925 if (config_data[16] & 0x1) 2926 result |= HSO_INFO_CRC_BUG; 2927 2928 return result; 2929 } 2930 2931 /* called once for each interface upon device insertion */ 2932 static int hso_probe(struct usb_interface *interface, 2933 const struct usb_device_id *id) 2934 { 2935 int mux, i, if_num, port_spec; 2936 unsigned char port_mask; 2937 struct hso_device *hso_dev = NULL; 2938 struct hso_shared_int *shared_int; 2939 struct hso_device *tmp_dev = NULL; 2940 2941 if_num = interface->altsetting->desc.bInterfaceNumber; 2942 2943 /* Get the interface/port specification from either driver_info or from 2944 * the device itself */ 2945 if (id->driver_info) 2946 port_spec = ((u32 *)(id->driver_info))[if_num]; 2947 else 2948 port_spec = hso_get_config_data(interface); 2949 2950 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2951 dev_err(&interface->dev, "Not our interface\n"); 2952 return -ENODEV; 2953 } 2954 /* Check if we need to switch to alt interfaces prior to port 2955 * configuration */ 2956 if (interface->num_altsetting > 1) 2957 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2958 interface->needs_remote_wakeup = 1; 2959 2960 /* Allocate new hso device(s) */ 2961 switch (port_spec & HSO_INTF_MASK) { 2962 case HSO_INTF_MUX: 2963 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2964 /* Create the network device */ 2965 if (!disable_net) { 2966 hso_dev = hso_create_net_device(interface, 2967 port_spec); 2968 if (!hso_dev) 2969 goto exit; 2970 tmp_dev = hso_dev; 2971 } 2972 } 2973 2974 if (hso_get_mux_ports(interface, &port_mask)) 2975 /* TODO: de-allocate everything */ 2976 goto exit; 2977 2978 shared_int = hso_create_shared_int(interface); 2979 if (!shared_int) 2980 goto exit; 2981 2982 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2983 if (port_mask & i) { 2984 hso_dev = hso_create_mux_serial_device( 2985 interface, i, shared_int); 2986 if (!hso_dev) 2987 goto exit; 2988 } 2989 } 2990 2991 if (tmp_dev) 2992 hso_dev = tmp_dev; 2993 break; 2994 2995 case HSO_INTF_BULK: 2996 /* It's a regular bulk interface */ 2997 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 2998 !disable_net) 2999 hso_dev = hso_create_net_device(interface, port_spec); 3000 else 3001 hso_dev = 3002 hso_create_bulk_serial_device(interface, port_spec); 3003 if (!hso_dev) 3004 goto exit; 3005 break; 3006 default: 3007 goto exit; 3008 } 3009 3010 /* save our data pointer in this device */ 3011 usb_set_intfdata(interface, hso_dev); 3012 3013 /* done */ 3014 return 0; 3015 exit: 3016 hso_free_interface(interface); 3017 return -ENODEV; 3018 } 3019 3020 /* device removed, cleaning up */ 3021 static void hso_disconnect(struct usb_interface *interface) 3022 { 3023 hso_free_interface(interface); 3024 3025 /* remove reference of our private data */ 3026 usb_set_intfdata(interface, NULL); 3027 } 3028 3029 static void async_get_intf(struct work_struct *data) 3030 { 3031 struct hso_device *hso_dev = 3032 container_of(data, struct hso_device, async_get_intf); 3033 usb_autopm_get_interface(hso_dev->interface); 3034 } 3035 3036 static void async_put_intf(struct work_struct *data) 3037 { 3038 struct hso_device *hso_dev = 3039 container_of(data, struct hso_device, async_put_intf); 3040 usb_autopm_put_interface(hso_dev->interface); 3041 } 3042 3043 static int hso_get_activity(struct hso_device *hso_dev) 3044 { 3045 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3046 if (!hso_dev->is_active) { 3047 hso_dev->is_active = 1; 3048 schedule_work(&hso_dev->async_get_intf); 3049 } 3050 } 3051 3052 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3053 return -EAGAIN; 3054 3055 usb_mark_last_busy(hso_dev->usb); 3056 3057 return 0; 3058 } 3059 3060 static int hso_put_activity(struct hso_device *hso_dev) 3061 { 3062 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3063 if (hso_dev->is_active) { 3064 hso_dev->is_active = 0; 3065 schedule_work(&hso_dev->async_put_intf); 3066 return -EAGAIN; 3067 } 3068 } 3069 hso_dev->is_active = 0; 3070 return 0; 3071 } 3072 3073 /* called by kernel when we need to suspend device */ 3074 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3075 { 3076 int i, result; 3077 3078 /* Stop all serial ports */ 3079 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3080 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3081 result = hso_stop_serial_device(serial_table[i]); 3082 if (result) 3083 goto out; 3084 } 3085 } 3086 3087 /* Stop all network ports */ 3088 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3089 if (network_table[i] && 3090 (network_table[i]->interface == iface)) { 3091 result = hso_stop_net_device(network_table[i]); 3092 if (result) 3093 goto out; 3094 } 3095 } 3096 3097 out: 3098 return 0; 3099 } 3100 3101 /* called by kernel when we need to resume device */ 3102 static int hso_resume(struct usb_interface *iface) 3103 { 3104 int i, result = 0; 3105 struct hso_net *hso_net; 3106 3107 /* Start all serial ports */ 3108 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3109 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3110 if (dev2ser(serial_table[i])->open_count) { 3111 result = 3112 hso_start_serial_device(serial_table[i], GFP_NOIO); 3113 hso_kick_transmit(dev2ser(serial_table[i])); 3114 if (result) 3115 goto out; 3116 } 3117 } 3118 } 3119 3120 /* Start all network ports */ 3121 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3122 if (network_table[i] && 3123 (network_table[i]->interface == iface)) { 3124 hso_net = dev2net(network_table[i]); 3125 if (hso_net->flags & IFF_UP) { 3126 /* First transmit any lingering data, 3127 then restart the device. */ 3128 if (hso_net->skb_tx_buf) { 3129 dev_dbg(&iface->dev, 3130 "Transmitting" 3131 " lingering data\n"); 3132 hso_net_start_xmit(hso_net->skb_tx_buf, 3133 hso_net->net); 3134 hso_net->skb_tx_buf = NULL; 3135 } 3136 result = hso_start_net_device(network_table[i]); 3137 if (result) 3138 goto out; 3139 } 3140 } 3141 } 3142 3143 out: 3144 return result; 3145 } 3146 3147 static void reset_device(struct work_struct *data) 3148 { 3149 struct hso_device *hso_dev = 3150 container_of(data, struct hso_device, reset_device); 3151 struct usb_device *usb = hso_dev->usb; 3152 int result; 3153 3154 if (hso_dev->usb_gone) { 3155 D1("No reset during disconnect\n"); 3156 } else { 3157 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3158 if (result < 0) 3159 D1("unable to lock device for reset: %d\n", result); 3160 else { 3161 usb_reset_device(usb); 3162 usb_unlock_device(usb); 3163 } 3164 } 3165 } 3166 3167 static void hso_serial_ref_free(struct kref *ref) 3168 { 3169 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3170 3171 hso_free_serial_device(hso_dev); 3172 } 3173 3174 static void hso_free_interface(struct usb_interface *interface) 3175 { 3176 struct hso_serial *hso_dev; 3177 struct tty_struct *tty; 3178 int i; 3179 3180 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3181 if (serial_table[i] && 3182 (serial_table[i]->interface == interface)) { 3183 hso_dev = dev2ser(serial_table[i]); 3184 spin_lock_irq(&hso_dev->serial_lock); 3185 tty = tty_kref_get(hso_dev->tty); 3186 spin_unlock_irq(&hso_dev->serial_lock); 3187 if (tty) 3188 tty_hangup(tty); 3189 mutex_lock(&hso_dev->parent->mutex); 3190 tty_kref_put(tty); 3191 hso_dev->parent->usb_gone = 1; 3192 mutex_unlock(&hso_dev->parent->mutex); 3193 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3194 } 3195 } 3196 3197 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3198 if (network_table[i] && 3199 (network_table[i]->interface == interface)) { 3200 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3201 /* hso_stop_net_device doesn't stop the net queue since 3202 * traffic needs to start it again when suspended */ 3203 netif_stop_queue(dev2net(network_table[i])->net); 3204 hso_stop_net_device(network_table[i]); 3205 cancel_work_sync(&network_table[i]->async_put_intf); 3206 cancel_work_sync(&network_table[i]->async_get_intf); 3207 if (rfk) { 3208 rfkill_unregister(rfk); 3209 rfkill_destroy(rfk); 3210 } 3211 hso_free_net_device(network_table[i]); 3212 } 3213 } 3214 } 3215 3216 /* Helper functions */ 3217 3218 /* Get the endpoint ! */ 3219 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3220 int type, int dir) 3221 { 3222 int i; 3223 struct usb_host_interface *iface = intf->cur_altsetting; 3224 struct usb_endpoint_descriptor *endp; 3225 3226 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3227 endp = &iface->endpoint[i].desc; 3228 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3229 (usb_endpoint_type(endp) == type)) 3230 return endp; 3231 } 3232 3233 return NULL; 3234 } 3235 3236 /* Get the byte that describes which ports are enabled */ 3237 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3238 { 3239 int i; 3240 struct usb_host_interface *iface = intf->cur_altsetting; 3241 3242 if (iface->extralen == 3) { 3243 *ports = iface->extra[2]; 3244 return 0; 3245 } 3246 3247 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3248 if (iface->endpoint[i].extralen == 3) { 3249 *ports = iface->endpoint[i].extra[2]; 3250 return 0; 3251 } 3252 } 3253 3254 return -1; 3255 } 3256 3257 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3258 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3259 struct usb_device *usb, gfp_t gfp) 3260 { 3261 int result; 3262 3263 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3264 usb_rcvintpipe(usb, 3265 shared_int->intr_endp->bEndpointAddress & 0x7F), 3266 shared_int->shared_intr_buf, 3267 1, 3268 intr_callback, shared_int, 3269 shared_int->intr_endp->bInterval); 3270 3271 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3272 if (result) 3273 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3274 result); 3275 3276 return result; 3277 } 3278 3279 /* operations setup of the serial interface */ 3280 static const struct tty_operations hso_serial_ops = { 3281 .open = hso_serial_open, 3282 .close = hso_serial_close, 3283 .write = hso_serial_write, 3284 .write_room = hso_serial_write_room, 3285 .ioctl = hso_serial_ioctl, 3286 .set_termios = hso_serial_set_termios, 3287 .chars_in_buffer = hso_serial_chars_in_buffer, 3288 .tiocmget = hso_serial_tiocmget, 3289 .tiocmset = hso_serial_tiocmset, 3290 .get_icount = hso_get_count, 3291 .unthrottle = hso_unthrottle 3292 }; 3293 3294 static struct usb_driver hso_driver = { 3295 .name = driver_name, 3296 .probe = hso_probe, 3297 .disconnect = hso_disconnect, 3298 .id_table = hso_ids, 3299 .suspend = hso_suspend, 3300 .resume = hso_resume, 3301 .reset_resume = hso_resume, 3302 .supports_autosuspend = 1, 3303 }; 3304 3305 static int __init hso_init(void) 3306 { 3307 int i; 3308 int result; 3309 3310 /* put it in the log */ 3311 printk(KERN_INFO "hso: %s\n", version); 3312 3313 /* Initialise the serial table semaphore and table */ 3314 spin_lock_init(&serial_table_lock); 3315 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3316 serial_table[i] = NULL; 3317 3318 /* allocate our driver using the proper amount of supported minors */ 3319 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3320 if (!tty_drv) 3321 return -ENOMEM; 3322 3323 /* fill in all needed values */ 3324 tty_drv->magic = TTY_DRIVER_MAGIC; 3325 tty_drv->owner = THIS_MODULE; 3326 tty_drv->driver_name = driver_name; 3327 tty_drv->name = tty_filename; 3328 3329 /* if major number is provided as parameter, use that one */ 3330 if (tty_major) 3331 tty_drv->major = tty_major; 3332 3333 tty_drv->minor_start = 0; 3334 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3335 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3336 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3337 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3338 tty_drv->init_termios = tty_std_termios; 3339 hso_init_termios(&tty_drv->init_termios); 3340 tty_set_operations(tty_drv, &hso_serial_ops); 3341 3342 /* register the tty driver */ 3343 result = tty_register_driver(tty_drv); 3344 if (result) { 3345 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3346 __func__, result); 3347 return result; 3348 } 3349 3350 /* register this module as an usb driver */ 3351 result = usb_register(&hso_driver); 3352 if (result) { 3353 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3354 result); 3355 /* cleanup serial interface */ 3356 tty_unregister_driver(tty_drv); 3357 return result; 3358 } 3359 3360 /* done */ 3361 return 0; 3362 } 3363 3364 static void __exit hso_exit(void) 3365 { 3366 printk(KERN_INFO "hso: unloaded\n"); 3367 3368 tty_unregister_driver(tty_drv); 3369 /* deregister the usb driver */ 3370 usb_deregister(&hso_driver); 3371 } 3372 3373 /* Module definitions */ 3374 module_init(hso_init); 3375 module_exit(hso_exit); 3376 3377 MODULE_AUTHOR(MOD_AUTHOR); 3378 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3379 MODULE_LICENSE(MOD_LICENSE); 3380 3381 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3382 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3383 module_param(debug, int, S_IRUGO | S_IWUSR); 3384 3385 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3386 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3387 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3388 3389 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3390 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3391 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3392