1 /****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31 /****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53 #include <linux/sched.h> 54 #include <linux/slab.h> 55 #include <linux/init.h> 56 #include <linux/delay.h> 57 #include <linux/netdevice.h> 58 #include <linux/module.h> 59 #include <linux/ethtool.h> 60 #include <linux/usb.h> 61 #include <linux/timer.h> 62 #include <linux/tty.h> 63 #include <linux/tty_driver.h> 64 #include <linux/tty_flip.h> 65 #include <linux/kmod.h> 66 #include <linux/rfkill.h> 67 #include <linux/ip.h> 68 #include <linux/uaccess.h> 69 #include <linux/usb/cdc.h> 70 #include <net/arp.h> 71 #include <asm/byteorder.h> 72 #include <linux/serial_core.h> 73 #include <linux/serial.h> 74 75 76 #define DRIVER_VERSION "1.2" 77 #define MOD_AUTHOR "Option Wireless" 78 #define MOD_DESCRIPTION "USB High Speed Option driver" 79 #define MOD_LICENSE "GPL" 80 81 #define HSO_MAX_NET_DEVICES 10 82 #define HSO__MAX_MTU 2048 83 #define DEFAULT_MTU 1500 84 #define DEFAULT_MRU 1500 85 86 #define CTRL_URB_RX_SIZE 1024 87 #define CTRL_URB_TX_SIZE 64 88 89 #define BULK_URB_RX_SIZE 4096 90 #define BULK_URB_TX_SIZE 8192 91 92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 94 #define MUX_BULK_RX_BUF_COUNT 4 95 #define USB_TYPE_OPTION_VENDOR 0x20 96 97 /* These definitions are used with the struct hso_net flags element */ 98 /* - use *_bit operations on it. (bit indices not values.) */ 99 #define HSO_NET_RUNNING 0 100 101 #define HSO_NET_TX_TIMEOUT (HZ*10) 102 103 #define HSO_SERIAL_MAGIC 0x48534f31 104 105 /* Number of ttys to handle */ 106 #define HSO_SERIAL_TTY_MINORS 256 107 108 #define MAX_RX_URBS 2 109 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 111 { 112 if (tty) 113 return tty->driver_data; 114 return NULL; 115 } 116 117 /*****************************************************************************/ 118 /* Debugging functions */ 119 /*****************************************************************************/ 120 #define D__(lvl_, fmt, arg...) \ 121 do { \ 122 printk(lvl_ "[%d:%s]: " fmt "\n", \ 123 __LINE__, __func__, ## arg); \ 124 } while (0) 125 126 #define D_(lvl, args...) \ 127 do { \ 128 if (lvl & debug) \ 129 D__(KERN_INFO, args); \ 130 } while (0) 131 132 #define D1(args...) D_(0x01, ##args) 133 #define D2(args...) D_(0x02, ##args) 134 #define D3(args...) D_(0x04, ##args) 135 #define D4(args...) D_(0x08, ##args) 136 #define D5(args...) D_(0x10, ##args) 137 138 /*****************************************************************************/ 139 /* Enumerators */ 140 /*****************************************************************************/ 141 enum pkt_parse_state { 142 WAIT_IP, 143 WAIT_DATA, 144 WAIT_SYNC 145 }; 146 147 /*****************************************************************************/ 148 /* Structs */ 149 /*****************************************************************************/ 150 151 struct hso_shared_int { 152 struct usb_endpoint_descriptor *intr_endp; 153 void *shared_intr_buf; 154 struct urb *shared_intr_urb; 155 struct usb_device *usb; 156 int use_count; 157 int ref_count; 158 struct mutex shared_int_lock; 159 }; 160 161 struct hso_net { 162 struct hso_device *parent; 163 struct net_device *net; 164 struct rfkill *rfkill; 165 166 struct usb_endpoint_descriptor *in_endp; 167 struct usb_endpoint_descriptor *out_endp; 168 169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 170 struct urb *mux_bulk_tx_urb; 171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 172 void *mux_bulk_tx_buf; 173 174 struct sk_buff *skb_rx_buf; 175 struct sk_buff *skb_tx_buf; 176 177 enum pkt_parse_state rx_parse_state; 178 spinlock_t net_lock; 179 180 unsigned short rx_buf_size; 181 unsigned short rx_buf_missing; 182 struct iphdr rx_ip_hdr; 183 184 unsigned long flags; 185 }; 186 187 enum rx_ctrl_state{ 188 RX_IDLE, 189 RX_SENT, 190 RX_PENDING 191 }; 192 193 #define BM_REQUEST_TYPE (0xa1) 194 #define B_NOTIFICATION (0x20) 195 #define W_VALUE (0x0) 196 #define W_INDEX (0x2) 197 #define W_LENGTH (0x2) 198 199 #define B_OVERRUN (0x1<<6) 200 #define B_PARITY (0x1<<5) 201 #define B_FRAMING (0x1<<4) 202 #define B_RING_SIGNAL (0x1<<3) 203 #define B_BREAK (0x1<<2) 204 #define B_TX_CARRIER (0x1<<1) 205 #define B_RX_CARRIER (0x1<<0) 206 207 struct hso_serial_state_notification { 208 u8 bmRequestType; 209 u8 bNotification; 210 u16 wValue; 211 u16 wIndex; 212 u16 wLength; 213 u16 UART_state_bitmap; 214 } __packed; 215 216 struct hso_tiocmget { 217 struct mutex mutex; 218 wait_queue_head_t waitq; 219 int intr_completed; 220 struct usb_endpoint_descriptor *endp; 221 struct urb *urb; 222 struct hso_serial_state_notification serial_state_notification; 223 u16 prev_UART_state_bitmap; 224 struct uart_icount icount; 225 }; 226 227 228 struct hso_serial { 229 struct hso_device *parent; 230 int magic; 231 u8 minor; 232 233 struct hso_shared_int *shared_int; 234 235 /* rx/tx urb could be either a bulk urb or a control urb depending 236 on which serial port it is used on. */ 237 struct urb *rx_urb[MAX_RX_URBS]; 238 u8 num_rx_urbs; 239 u8 *rx_data[MAX_RX_URBS]; 240 u16 rx_data_length; /* should contain allocated length */ 241 242 struct urb *tx_urb; 243 u8 *tx_data; 244 u8 *tx_buffer; 245 u16 tx_data_length; /* should contain allocated length */ 246 u16 tx_data_count; 247 u16 tx_buffer_count; 248 struct usb_ctrlrequest ctrl_req_tx; 249 struct usb_ctrlrequest ctrl_req_rx; 250 251 struct usb_endpoint_descriptor *in_endp; 252 struct usb_endpoint_descriptor *out_endp; 253 254 enum rx_ctrl_state rx_state; 255 u8 rts_state; 256 u8 dtr_state; 257 unsigned tx_urb_used:1; 258 259 /* from usb_serial_port */ 260 struct tty_struct *tty; 261 int open_count; 262 spinlock_t serial_lock; 263 264 int (*write_data) (struct hso_serial *serial); 265 struct hso_tiocmget *tiocmget; 266 /* Hacks required to get flow control 267 * working on the serial receive buffers 268 * so as not to drop characters on the floor. 269 */ 270 int curr_rx_urb_idx; 271 u16 curr_rx_urb_offset; 272 u8 rx_urb_filled[MAX_RX_URBS]; 273 struct tasklet_struct unthrottle_tasklet; 274 struct work_struct retry_unthrottle_workqueue; 275 }; 276 277 struct hso_device { 278 union { 279 struct hso_serial *dev_serial; 280 struct hso_net *dev_net; 281 } port_data; 282 283 u32 port_spec; 284 285 u8 is_active; 286 u8 usb_gone; 287 struct work_struct async_get_intf; 288 struct work_struct async_put_intf; 289 struct work_struct reset_device; 290 291 struct usb_device *usb; 292 struct usb_interface *interface; 293 294 struct device *dev; 295 struct kref ref; 296 struct mutex mutex; 297 }; 298 299 /* Type of interface */ 300 #define HSO_INTF_MASK 0xFF00 301 #define HSO_INTF_MUX 0x0100 302 #define HSO_INTF_BULK 0x0200 303 304 /* Type of port */ 305 #define HSO_PORT_MASK 0xFF 306 #define HSO_PORT_NO_PORT 0x0 307 #define HSO_PORT_CONTROL 0x1 308 #define HSO_PORT_APP 0x2 309 #define HSO_PORT_GPS 0x3 310 #define HSO_PORT_PCSC 0x4 311 #define HSO_PORT_APP2 0x5 312 #define HSO_PORT_GPS_CONTROL 0x6 313 #define HSO_PORT_MSD 0x7 314 #define HSO_PORT_VOICE 0x8 315 #define HSO_PORT_DIAG2 0x9 316 #define HSO_PORT_DIAG 0x10 317 #define HSO_PORT_MODEM 0x11 318 #define HSO_PORT_NETWORK 0x12 319 320 /* Additional device info */ 321 #define HSO_INFO_MASK 0xFF000000 322 #define HSO_INFO_CRC_BUG 0x01000000 323 324 /*****************************************************************************/ 325 /* Prototypes */ 326 /*****************************************************************************/ 327 /* Serial driver functions */ 328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 329 unsigned int set, unsigned int clear); 330 static void ctrl_callback(struct urb *urb); 331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 332 static void hso_kick_transmit(struct hso_serial *serial); 333 /* Helper functions */ 334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 335 struct usb_device *usb, gfp_t gfp); 336 static void handle_usb_error(int status, const char *function, 337 struct hso_device *hso_dev); 338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 339 int type, int dir); 340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 341 static void hso_free_interface(struct usb_interface *intf); 342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 343 static int hso_stop_serial_device(struct hso_device *hso_dev); 344 static int hso_start_net_device(struct hso_device *hso_dev); 345 static void hso_free_shared_int(struct hso_shared_int *shared_int); 346 static int hso_stop_net_device(struct hso_device *hso_dev); 347 static void hso_serial_ref_free(struct kref *ref); 348 static void hso_std_serial_read_bulk_callback(struct urb *urb); 349 static int hso_mux_serial_read(struct hso_serial *serial); 350 static void async_get_intf(struct work_struct *data); 351 static void async_put_intf(struct work_struct *data); 352 static int hso_put_activity(struct hso_device *hso_dev); 353 static int hso_get_activity(struct hso_device *hso_dev); 354 static void tiocmget_intr_callback(struct urb *urb); 355 static void reset_device(struct work_struct *data); 356 /*****************************************************************************/ 357 /* Helping functions */ 358 /*****************************************************************************/ 359 360 /* #define DEBUG */ 361 362 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 363 { 364 return hso_dev->port_data.dev_net; 365 } 366 367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 368 { 369 return hso_dev->port_data.dev_serial; 370 } 371 372 /* Debugging functions */ 373 #ifdef DEBUG 374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 375 unsigned int len) 376 { 377 static char name[255]; 378 379 sprintf(name, "hso[%d:%s]", line_count, func_name); 380 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 381 } 382 383 #define DUMP(buf_, len_) \ 384 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 385 386 #define DUMP1(buf_, len_) \ 387 do { \ 388 if (0x01 & debug) \ 389 DUMP(buf_, len_); \ 390 } while (0) 391 #else 392 #define DUMP(buf_, len_) 393 #define DUMP1(buf_, len_) 394 #endif 395 396 /* module parameters */ 397 static int debug; 398 static int tty_major; 399 static int disable_net; 400 401 /* driver info */ 402 static const char driver_name[] = "hso"; 403 static const char tty_filename[] = "ttyHS"; 404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; 405 /* the usb driver itself (registered in hso_init) */ 406 static struct usb_driver hso_driver; 407 /* serial structures */ 408 static struct tty_driver *tty_drv; 409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 411 static spinlock_t serial_table_lock; 412 413 static const s32 default_port_spec[] = { 414 HSO_INTF_MUX | HSO_PORT_NETWORK, 415 HSO_INTF_BULK | HSO_PORT_DIAG, 416 HSO_INTF_BULK | HSO_PORT_MODEM, 417 0 418 }; 419 420 static const s32 icon321_port_spec[] = { 421 HSO_INTF_MUX | HSO_PORT_NETWORK, 422 HSO_INTF_BULK | HSO_PORT_DIAG2, 423 HSO_INTF_BULK | HSO_PORT_MODEM, 424 HSO_INTF_BULK | HSO_PORT_DIAG, 425 0 426 }; 427 428 #define default_port_device(vendor, product) \ 429 USB_DEVICE(vendor, product), \ 430 .driver_info = (kernel_ulong_t)default_port_spec 431 432 #define icon321_port_device(vendor, product) \ 433 USB_DEVICE(vendor, product), \ 434 .driver_info = (kernel_ulong_t)icon321_port_spec 435 436 /* list of devices we support */ 437 static const struct usb_device_id hso_ids[] = { 438 {default_port_device(0x0af0, 0x6711)}, 439 {default_port_device(0x0af0, 0x6731)}, 440 {default_port_device(0x0af0, 0x6751)}, 441 {default_port_device(0x0af0, 0x6771)}, 442 {default_port_device(0x0af0, 0x6791)}, 443 {default_port_device(0x0af0, 0x6811)}, 444 {default_port_device(0x0af0, 0x6911)}, 445 {default_port_device(0x0af0, 0x6951)}, 446 {default_port_device(0x0af0, 0x6971)}, 447 {default_port_device(0x0af0, 0x7011)}, 448 {default_port_device(0x0af0, 0x7031)}, 449 {default_port_device(0x0af0, 0x7051)}, 450 {default_port_device(0x0af0, 0x7071)}, 451 {default_port_device(0x0af0, 0x7111)}, 452 {default_port_device(0x0af0, 0x7211)}, 453 {default_port_device(0x0af0, 0x7251)}, 454 {default_port_device(0x0af0, 0x7271)}, 455 {default_port_device(0x0af0, 0x7311)}, 456 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 457 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 458 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 459 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 460 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 463 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 464 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 465 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 466 {USB_DEVICE(0x0af0, 0x7701)}, 467 {USB_DEVICE(0x0af0, 0x7706)}, 468 {USB_DEVICE(0x0af0, 0x7801)}, 469 {USB_DEVICE(0x0af0, 0x7901)}, 470 {USB_DEVICE(0x0af0, 0x7A01)}, 471 {USB_DEVICE(0x0af0, 0x7A05)}, 472 {USB_DEVICE(0x0af0, 0x8200)}, 473 {USB_DEVICE(0x0af0, 0x8201)}, 474 {USB_DEVICE(0x0af0, 0x8300)}, 475 {USB_DEVICE(0x0af0, 0x8302)}, 476 {USB_DEVICE(0x0af0, 0x8304)}, 477 {USB_DEVICE(0x0af0, 0x8400)}, 478 {USB_DEVICE(0x0af0, 0x8600)}, 479 {USB_DEVICE(0x0af0, 0x8800)}, 480 {USB_DEVICE(0x0af0, 0x8900)}, 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 void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 847 { 848 struct hso_net *odev = netdev_priv(net); 849 850 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 851 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 852 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 853 } 854 855 static const struct ethtool_ops ops = { 856 .get_drvinfo = hso_get_drvinfo, 857 .get_link = ethtool_op_get_link 858 }; 859 860 /* called when a packet did not ack after watchdogtimeout */ 861 static void hso_net_tx_timeout(struct net_device *net) 862 { 863 struct hso_net *odev = netdev_priv(net); 864 865 if (!odev) 866 return; 867 868 /* Tell syslog we are hosed. */ 869 dev_warn(&net->dev, "Tx timed out.\n"); 870 871 /* Tear the waiting frame off the list */ 872 if (odev->mux_bulk_tx_urb && 873 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 874 usb_unlink_urb(odev->mux_bulk_tx_urb); 875 876 /* Update statistics */ 877 net->stats.tx_errors++; 878 } 879 880 /* make a real packet from the received USB buffer */ 881 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 882 unsigned int count, unsigned char is_eop) 883 { 884 unsigned short temp_bytes; 885 unsigned short buffer_offset = 0; 886 unsigned short frame_len; 887 unsigned char *tmp_rx_buf; 888 889 /* log if needed */ 890 D1("Rx %d bytes", count); 891 DUMP(ip_pkt, min(128, (int)count)); 892 893 while (count) { 894 switch (odev->rx_parse_state) { 895 case WAIT_IP: 896 /* waiting for IP header. */ 897 /* wanted bytes - size of ip header */ 898 temp_bytes = 899 (count < 900 odev->rx_buf_missing) ? count : odev-> 901 rx_buf_missing; 902 903 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 904 odev->rx_buf_size, ip_pkt + buffer_offset, 905 temp_bytes); 906 907 odev->rx_buf_size += temp_bytes; 908 buffer_offset += temp_bytes; 909 odev->rx_buf_missing -= temp_bytes; 910 count -= temp_bytes; 911 912 if (!odev->rx_buf_missing) { 913 /* header is complete allocate an sk_buffer and 914 * continue to WAIT_DATA */ 915 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 916 917 if ((frame_len > DEFAULT_MRU) || 918 (frame_len < sizeof(struct iphdr))) { 919 dev_err(&odev->net->dev, 920 "Invalid frame (%d) length\n", 921 frame_len); 922 odev->rx_parse_state = WAIT_SYNC; 923 continue; 924 } 925 /* Allocate an sk_buff */ 926 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 927 frame_len); 928 if (!odev->skb_rx_buf) { 929 /* We got no receive buffer. */ 930 D1("could not allocate memory"); 931 odev->rx_parse_state = WAIT_SYNC; 932 return; 933 } 934 935 /* Copy what we got so far. make room for iphdr 936 * after tail. */ 937 tmp_rx_buf = 938 skb_put(odev->skb_rx_buf, 939 sizeof(struct iphdr)); 940 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 941 sizeof(struct iphdr)); 942 943 /* ETH_HLEN */ 944 odev->rx_buf_size = sizeof(struct iphdr); 945 946 /* Filip actually use .tot_len */ 947 odev->rx_buf_missing = 948 frame_len - sizeof(struct iphdr); 949 odev->rx_parse_state = WAIT_DATA; 950 } 951 break; 952 953 case WAIT_DATA: 954 temp_bytes = (count < odev->rx_buf_missing) 955 ? count : odev->rx_buf_missing; 956 957 /* Copy the rest of the bytes that are left in the 958 * buffer into the waiting sk_buf. */ 959 /* Make room for temp_bytes after tail. */ 960 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 961 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 962 963 odev->rx_buf_missing -= temp_bytes; 964 count -= temp_bytes; 965 buffer_offset += temp_bytes; 966 odev->rx_buf_size += temp_bytes; 967 if (!odev->rx_buf_missing) { 968 /* Packet is complete. Inject into stack. */ 969 /* We have IP packet here */ 970 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 971 /* don't check it */ 972 odev->skb_rx_buf->ip_summed = 973 CHECKSUM_UNNECESSARY; 974 975 skb_reset_mac_header(odev->skb_rx_buf); 976 977 /* Ship it off to the kernel */ 978 netif_rx(odev->skb_rx_buf); 979 /* No longer our buffer. */ 980 odev->skb_rx_buf = NULL; 981 982 /* update out statistics */ 983 odev->net->stats.rx_packets++; 984 985 odev->net->stats.rx_bytes += odev->rx_buf_size; 986 987 odev->rx_buf_size = 0; 988 odev->rx_buf_missing = sizeof(struct iphdr); 989 odev->rx_parse_state = WAIT_IP; 990 } 991 break; 992 993 case WAIT_SYNC: 994 D1(" W_S"); 995 count = 0; 996 break; 997 default: 998 D1(" "); 999 count--; 1000 break; 1001 } 1002 } 1003 1004 /* Recovery mechanism for WAIT_SYNC state. */ 1005 if (is_eop) { 1006 if (odev->rx_parse_state == WAIT_SYNC) { 1007 odev->rx_parse_state = WAIT_IP; 1008 odev->rx_buf_size = 0; 1009 odev->rx_buf_missing = sizeof(struct iphdr); 1010 } 1011 } 1012 } 1013 1014 /* Moving data from usb to kernel (in interrupt state) */ 1015 static void read_bulk_callback(struct urb *urb) 1016 { 1017 struct hso_net *odev = urb->context; 1018 struct net_device *net; 1019 int result; 1020 int status = urb->status; 1021 1022 /* is al ok? (Filip: Who's Al ?) */ 1023 if (status) { 1024 handle_usb_error(status, __func__, odev->parent); 1025 return; 1026 } 1027 1028 /* Sanity check */ 1029 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1030 D1("BULK IN callback but driver is not active!"); 1031 return; 1032 } 1033 usb_mark_last_busy(urb->dev); 1034 1035 net = odev->net; 1036 1037 if (!netif_device_present(net)) { 1038 /* Somebody killed our network interface... */ 1039 return; 1040 } 1041 1042 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1043 u32 rest; 1044 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1045 rest = urb->actual_length % 1046 le16_to_cpu(odev->in_endp->wMaxPacketSize); 1047 if (((rest == 5) || (rest == 6)) && 1048 !memcmp(((u8 *) urb->transfer_buffer) + 1049 urb->actual_length - 4, crc_check, 4)) { 1050 urb->actual_length -= 4; 1051 } 1052 } 1053 1054 /* do we even have a packet? */ 1055 if (urb->actual_length) { 1056 /* Handle the IP stream, add header and push it onto network 1057 * stack if the packet is complete. */ 1058 spin_lock(&odev->net_lock); 1059 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1060 (urb->transfer_buffer_length > 1061 urb->actual_length) ? 1 : 0); 1062 spin_unlock(&odev->net_lock); 1063 } 1064 1065 /* We are done with this URB, resubmit it. Prep the USB to wait for 1066 * another frame. Reuse same as received. */ 1067 usb_fill_bulk_urb(urb, 1068 odev->parent->usb, 1069 usb_rcvbulkpipe(odev->parent->usb, 1070 odev->in_endp-> 1071 bEndpointAddress & 0x7F), 1072 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1073 read_bulk_callback, odev); 1074 1075 /* Give this to the USB subsystem so it can tell us when more data 1076 * arrives. */ 1077 result = usb_submit_urb(urb, GFP_ATOMIC); 1078 if (result) 1079 dev_warn(&odev->parent->interface->dev, 1080 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1081 result); 1082 } 1083 1084 /* Serial driver functions */ 1085 1086 static void hso_init_termios(struct ktermios *termios) 1087 { 1088 /* 1089 * The default requirements for this device are: 1090 */ 1091 termios->c_iflag &= 1092 ~(IGNBRK /* disable ignore break */ 1093 | BRKINT /* disable break causes interrupt */ 1094 | PARMRK /* disable mark parity errors */ 1095 | ISTRIP /* disable clear high bit of input characters */ 1096 | INLCR /* disable translate NL to CR */ 1097 | IGNCR /* disable ignore CR */ 1098 | ICRNL /* disable translate CR to NL */ 1099 | IXON); /* disable enable XON/XOFF flow control */ 1100 1101 /* disable postprocess output characters */ 1102 termios->c_oflag &= ~OPOST; 1103 1104 termios->c_lflag &= 1105 ~(ECHO /* disable echo input characters */ 1106 | ECHONL /* disable echo new line */ 1107 | ICANON /* disable erase, kill, werase, and rprnt 1108 special characters */ 1109 | ISIG /* disable interrupt, quit, and suspend special 1110 characters */ 1111 | IEXTEN); /* disable non-POSIX special characters */ 1112 1113 termios->c_cflag &= 1114 ~(CSIZE /* no size */ 1115 | PARENB /* disable parity bit */ 1116 | CBAUD /* clear current baud rate */ 1117 | CBAUDEX); /* clear current buad rate */ 1118 1119 termios->c_cflag |= CS8; /* character size 8 bits */ 1120 1121 /* baud rate 115200 */ 1122 tty_termios_encode_baud_rate(termios, 115200, 115200); 1123 } 1124 1125 static void _hso_serial_set_termios(struct tty_struct *tty, 1126 struct ktermios *old) 1127 { 1128 struct hso_serial *serial = get_serial_by_tty(tty); 1129 struct ktermios *termios; 1130 1131 if (!serial) { 1132 printk(KERN_ERR "%s: no tty structures", __func__); 1133 return; 1134 } 1135 1136 D4("port %d", serial->minor); 1137 1138 /* 1139 * Fix up unsupported bits 1140 */ 1141 termios = tty->termios; 1142 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1143 1144 termios->c_cflag &= 1145 ~(CSIZE /* no size */ 1146 | PARENB /* disable parity bit */ 1147 | CBAUD /* clear current baud rate */ 1148 | CBAUDEX); /* clear current buad rate */ 1149 1150 termios->c_cflag |= CS8; /* character size 8 bits */ 1151 1152 /* baud rate 115200 */ 1153 tty_encode_baud_rate(tty, 115200, 115200); 1154 } 1155 1156 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1157 { 1158 int result; 1159 /* We are done with this URB, resubmit it. Prep the USB to wait for 1160 * another frame */ 1161 usb_fill_bulk_urb(urb, serial->parent->usb, 1162 usb_rcvbulkpipe(serial->parent->usb, 1163 serial->in_endp-> 1164 bEndpointAddress & 0x7F), 1165 urb->transfer_buffer, serial->rx_data_length, 1166 hso_std_serial_read_bulk_callback, serial); 1167 /* Give this to the USB subsystem so it can tell us when more data 1168 * arrives. */ 1169 result = usb_submit_urb(urb, GFP_ATOMIC); 1170 if (result) { 1171 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1172 __func__, result); 1173 } 1174 } 1175 1176 1177 1178 1179 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1180 { 1181 int count; 1182 struct urb *curr_urb; 1183 1184 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1185 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1186 count = put_rxbuf_data(curr_urb, serial); 1187 if (count == -1) 1188 return; 1189 if (count == 0) { 1190 serial->curr_rx_urb_idx++; 1191 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1192 serial->curr_rx_urb_idx = 0; 1193 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1194 } 1195 } 1196 } 1197 1198 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1199 { 1200 int count = 0; 1201 struct urb *urb; 1202 1203 urb = serial->rx_urb[0]; 1204 if (serial->open_count > 0) { 1205 count = put_rxbuf_data(urb, serial); 1206 if (count == -1) 1207 return; 1208 } 1209 /* Re issue a read as long as we receive data. */ 1210 1211 if (count == 0 && ((urb->actual_length != 0) || 1212 (serial->rx_state == RX_PENDING))) { 1213 serial->rx_state = RX_SENT; 1214 hso_mux_serial_read(serial); 1215 } else 1216 serial->rx_state = RX_IDLE; 1217 } 1218 1219 1220 /* read callback for Diag and CS port */ 1221 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1222 { 1223 struct hso_serial *serial = urb->context; 1224 int status = urb->status; 1225 1226 /* sanity check */ 1227 if (!serial) { 1228 D1("serial == NULL"); 1229 return; 1230 } else if (status) { 1231 handle_usb_error(status, __func__, serial->parent); 1232 return; 1233 } 1234 1235 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1236 D1("Actual length = %d\n", urb->actual_length); 1237 DUMP1(urb->transfer_buffer, urb->actual_length); 1238 1239 /* Anyone listening? */ 1240 if (serial->open_count == 0) 1241 return; 1242 1243 if (status == 0) { 1244 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1245 u32 rest; 1246 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1247 rest = 1248 urb->actual_length % 1249 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1250 if (((rest == 5) || (rest == 6)) && 1251 !memcmp(((u8 *) urb->transfer_buffer) + 1252 urb->actual_length - 4, crc_check, 4)) { 1253 urb->actual_length -= 4; 1254 } 1255 } 1256 /* Valid data, handle RX data */ 1257 spin_lock(&serial->serial_lock); 1258 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1259 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1260 spin_unlock(&serial->serial_lock); 1261 } else if (status == -ENOENT || status == -ECONNRESET) { 1262 /* Unlinked - check for throttled port. */ 1263 D2("Port %d, successfully unlinked urb", serial->minor); 1264 spin_lock(&serial->serial_lock); 1265 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1266 hso_resubmit_rx_bulk_urb(serial, urb); 1267 spin_unlock(&serial->serial_lock); 1268 } else { 1269 D2("Port %d, status = %d for read urb", serial->minor, status); 1270 return; 1271 } 1272 } 1273 1274 /* 1275 * This needs to be a tasklet otherwise we will 1276 * end up recursively calling this function. 1277 */ 1278 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1279 { 1280 unsigned long flags; 1281 1282 spin_lock_irqsave(&serial->serial_lock, flags); 1283 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1284 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1285 else 1286 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1287 spin_unlock_irqrestore(&serial->serial_lock, flags); 1288 } 1289 1290 static void hso_unthrottle(struct tty_struct *tty) 1291 { 1292 struct hso_serial *serial = get_serial_by_tty(tty); 1293 1294 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1295 } 1296 1297 static void hso_unthrottle_workfunc(struct work_struct *work) 1298 { 1299 struct hso_serial *serial = 1300 container_of(work, struct hso_serial, 1301 retry_unthrottle_workqueue); 1302 hso_unthrottle_tasklet(serial); 1303 } 1304 1305 /* open the requested serial port */ 1306 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1307 { 1308 struct hso_serial *serial = get_serial_by_index(tty->index); 1309 int result; 1310 1311 /* sanity check */ 1312 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1313 WARN_ON(1); 1314 tty->driver_data = NULL; 1315 D1("Failed to open port"); 1316 return -ENODEV; 1317 } 1318 1319 mutex_lock(&serial->parent->mutex); 1320 result = usb_autopm_get_interface(serial->parent->interface); 1321 if (result < 0) 1322 goto err_out; 1323 1324 D1("Opening %d", serial->minor); 1325 kref_get(&serial->parent->ref); 1326 1327 /* setup */ 1328 spin_lock_irq(&serial->serial_lock); 1329 tty->driver_data = serial; 1330 tty_kref_put(serial->tty); 1331 serial->tty = tty_kref_get(tty); 1332 spin_unlock_irq(&serial->serial_lock); 1333 1334 /* check for port already opened, if not set the termios */ 1335 serial->open_count++; 1336 if (serial->open_count == 1) { 1337 tty->low_latency = 1; 1338 serial->rx_state = RX_IDLE; 1339 /* Force default termio settings */ 1340 _hso_serial_set_termios(tty, NULL); 1341 tasklet_init(&serial->unthrottle_tasklet, 1342 (void (*)(unsigned long))hso_unthrottle_tasklet, 1343 (unsigned long)serial); 1344 INIT_WORK(&serial->retry_unthrottle_workqueue, 1345 hso_unthrottle_workfunc); 1346 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1347 if (result) { 1348 hso_stop_serial_device(serial->parent); 1349 serial->open_count--; 1350 kref_put(&serial->parent->ref, hso_serial_ref_free); 1351 } 1352 } else { 1353 D1("Port was already open"); 1354 } 1355 1356 usb_autopm_put_interface(serial->parent->interface); 1357 1358 /* done */ 1359 if (result) 1360 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1361 err_out: 1362 mutex_unlock(&serial->parent->mutex); 1363 return result; 1364 } 1365 1366 /* close the requested serial port */ 1367 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1368 { 1369 struct hso_serial *serial = tty->driver_data; 1370 u8 usb_gone; 1371 1372 D1("Closing serial port"); 1373 1374 /* Open failed, no close cleanup required */ 1375 if (serial == NULL) 1376 return; 1377 1378 mutex_lock(&serial->parent->mutex); 1379 usb_gone = serial->parent->usb_gone; 1380 1381 if (!usb_gone) 1382 usb_autopm_get_interface(serial->parent->interface); 1383 1384 /* reset the rts and dtr */ 1385 /* do the actual close */ 1386 serial->open_count--; 1387 1388 if (serial->open_count <= 0) { 1389 serial->open_count = 0; 1390 spin_lock_irq(&serial->serial_lock); 1391 if (serial->tty == tty) { 1392 serial->tty->driver_data = NULL; 1393 serial->tty = NULL; 1394 tty_kref_put(tty); 1395 } 1396 spin_unlock_irq(&serial->serial_lock); 1397 if (!usb_gone) 1398 hso_stop_serial_device(serial->parent); 1399 tasklet_kill(&serial->unthrottle_tasklet); 1400 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1401 } 1402 1403 if (!usb_gone) 1404 usb_autopm_put_interface(serial->parent->interface); 1405 1406 mutex_unlock(&serial->parent->mutex); 1407 1408 kref_put(&serial->parent->ref, hso_serial_ref_free); 1409 } 1410 1411 /* close the requested serial port */ 1412 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1413 int count) 1414 { 1415 struct hso_serial *serial = get_serial_by_tty(tty); 1416 int space, tx_bytes; 1417 unsigned long flags; 1418 1419 /* sanity check */ 1420 if (serial == NULL) { 1421 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1422 return -ENODEV; 1423 } 1424 1425 spin_lock_irqsave(&serial->serial_lock, flags); 1426 1427 space = serial->tx_data_length - serial->tx_buffer_count; 1428 tx_bytes = (count < space) ? count : space; 1429 1430 if (!tx_bytes) 1431 goto out; 1432 1433 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1434 serial->tx_buffer_count += tx_bytes; 1435 1436 out: 1437 spin_unlock_irqrestore(&serial->serial_lock, flags); 1438 1439 hso_kick_transmit(serial); 1440 /* done */ 1441 return tx_bytes; 1442 } 1443 1444 /* how much room is there for writing */ 1445 static int hso_serial_write_room(struct tty_struct *tty) 1446 { 1447 struct hso_serial *serial = get_serial_by_tty(tty); 1448 int room; 1449 unsigned long flags; 1450 1451 spin_lock_irqsave(&serial->serial_lock, flags); 1452 room = serial->tx_data_length - serial->tx_buffer_count; 1453 spin_unlock_irqrestore(&serial->serial_lock, flags); 1454 1455 /* return free room */ 1456 return room; 1457 } 1458 1459 /* setup the term */ 1460 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1461 { 1462 struct hso_serial *serial = get_serial_by_tty(tty); 1463 unsigned long flags; 1464 1465 if (old) 1466 D5("Termios called with: cflags new[%d] - old[%d]", 1467 tty->termios->c_cflag, old->c_cflag); 1468 1469 /* the actual setup */ 1470 spin_lock_irqsave(&serial->serial_lock, flags); 1471 if (serial->open_count) 1472 _hso_serial_set_termios(tty, old); 1473 else 1474 tty->termios = old; 1475 spin_unlock_irqrestore(&serial->serial_lock, flags); 1476 1477 /* done */ 1478 } 1479 1480 /* how many characters in the buffer */ 1481 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1482 { 1483 struct hso_serial *serial = get_serial_by_tty(tty); 1484 int chars; 1485 unsigned long flags; 1486 1487 /* sanity check */ 1488 if (serial == NULL) 1489 return 0; 1490 1491 spin_lock_irqsave(&serial->serial_lock, flags); 1492 chars = serial->tx_buffer_count; 1493 spin_unlock_irqrestore(&serial->serial_lock, flags); 1494 1495 return chars; 1496 } 1497 static int tiocmget_submit_urb(struct hso_serial *serial, 1498 struct hso_tiocmget *tiocmget, 1499 struct usb_device *usb) 1500 { 1501 int result; 1502 1503 if (serial->parent->usb_gone) 1504 return -ENODEV; 1505 usb_fill_int_urb(tiocmget->urb, usb, 1506 usb_rcvintpipe(usb, 1507 tiocmget->endp-> 1508 bEndpointAddress & 0x7F), 1509 &tiocmget->serial_state_notification, 1510 sizeof(struct hso_serial_state_notification), 1511 tiocmget_intr_callback, serial, 1512 tiocmget->endp->bInterval); 1513 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1514 if (result) { 1515 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1516 result); 1517 } 1518 return result; 1519 1520 } 1521 1522 static void tiocmget_intr_callback(struct urb *urb) 1523 { 1524 struct hso_serial *serial = urb->context; 1525 struct hso_tiocmget *tiocmget; 1526 int status = urb->status; 1527 u16 UART_state_bitmap, prev_UART_state_bitmap; 1528 struct uart_icount *icount; 1529 struct hso_serial_state_notification *serial_state_notification; 1530 struct usb_device *usb; 1531 1532 /* Sanity checks */ 1533 if (!serial) 1534 return; 1535 if (status) { 1536 handle_usb_error(status, __func__, serial->parent); 1537 return; 1538 } 1539 tiocmget = serial->tiocmget; 1540 if (!tiocmget) 1541 return; 1542 usb = serial->parent->usb; 1543 serial_state_notification = &tiocmget->serial_state_notification; 1544 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1545 serial_state_notification->bNotification != B_NOTIFICATION || 1546 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1547 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1548 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1549 dev_warn(&usb->dev, 1550 "hso received invalid serial state notification\n"); 1551 DUMP(serial_state_notification, 1552 sizeof(struct hso_serial_state_notification)); 1553 } else { 1554 1555 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1556 UART_state_bitmap); 1557 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1558 icount = &tiocmget->icount; 1559 spin_lock(&serial->serial_lock); 1560 if ((UART_state_bitmap & B_OVERRUN) != 1561 (prev_UART_state_bitmap & B_OVERRUN)) 1562 icount->parity++; 1563 if ((UART_state_bitmap & B_PARITY) != 1564 (prev_UART_state_bitmap & B_PARITY)) 1565 icount->parity++; 1566 if ((UART_state_bitmap & B_FRAMING) != 1567 (prev_UART_state_bitmap & B_FRAMING)) 1568 icount->frame++; 1569 if ((UART_state_bitmap & B_RING_SIGNAL) && 1570 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1571 icount->rng++; 1572 if ((UART_state_bitmap & B_BREAK) != 1573 (prev_UART_state_bitmap & B_BREAK)) 1574 icount->brk++; 1575 if ((UART_state_bitmap & B_TX_CARRIER) != 1576 (prev_UART_state_bitmap & B_TX_CARRIER)) 1577 icount->dsr++; 1578 if ((UART_state_bitmap & B_RX_CARRIER) != 1579 (prev_UART_state_bitmap & B_RX_CARRIER)) 1580 icount->dcd++; 1581 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1582 spin_unlock(&serial->serial_lock); 1583 tiocmget->intr_completed = 1; 1584 wake_up_interruptible(&tiocmget->waitq); 1585 } 1586 memset(serial_state_notification, 0, 1587 sizeof(struct hso_serial_state_notification)); 1588 tiocmget_submit_urb(serial, 1589 tiocmget, 1590 serial->parent->usb); 1591 } 1592 1593 /* 1594 * next few functions largely stolen from drivers/serial/serial_core.c 1595 */ 1596 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1597 * - mask passed in arg for lines of interest 1598 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1599 * Caller should use TIOCGICOUNT to see which one it was 1600 */ 1601 static int 1602 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1603 { 1604 DECLARE_WAITQUEUE(wait, current); 1605 struct uart_icount cprev, cnow; 1606 struct hso_tiocmget *tiocmget; 1607 int ret; 1608 1609 tiocmget = serial->tiocmget; 1610 if (!tiocmget) 1611 return -ENOENT; 1612 /* 1613 * note the counters on entry 1614 */ 1615 spin_lock_irq(&serial->serial_lock); 1616 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1617 spin_unlock_irq(&serial->serial_lock); 1618 add_wait_queue(&tiocmget->waitq, &wait); 1619 for (;;) { 1620 spin_lock_irq(&serial->serial_lock); 1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1622 spin_unlock_irq(&serial->serial_lock); 1623 set_current_state(TASK_INTERRUPTIBLE); 1624 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1625 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1626 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1627 ret = 0; 1628 break; 1629 } 1630 schedule(); 1631 /* see if a signal did it */ 1632 if (signal_pending(current)) { 1633 ret = -ERESTARTSYS; 1634 break; 1635 } 1636 cprev = cnow; 1637 } 1638 current->state = TASK_RUNNING; 1639 remove_wait_queue(&tiocmget->waitq, &wait); 1640 1641 return ret; 1642 } 1643 1644 /* 1645 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1646 * Return: write counters to the user passed counter struct 1647 * NB: both 1->0 and 0->1 transitions are counted except for 1648 * RI where only 0->1 is counted. 1649 */ 1650 static int hso_get_count(struct hso_serial *serial, 1651 struct serial_icounter_struct __user *icnt) 1652 { 1653 struct serial_icounter_struct icount; 1654 struct uart_icount cnow; 1655 struct hso_tiocmget *tiocmget = serial->tiocmget; 1656 1657 if (!tiocmget) 1658 return -ENOENT; 1659 spin_lock_irq(&serial->serial_lock); 1660 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1661 spin_unlock_irq(&serial->serial_lock); 1662 1663 icount.cts = cnow.cts; 1664 icount.dsr = cnow.dsr; 1665 icount.rng = cnow.rng; 1666 icount.dcd = cnow.dcd; 1667 icount.rx = cnow.rx; 1668 icount.tx = cnow.tx; 1669 icount.frame = cnow.frame; 1670 icount.overrun = cnow.overrun; 1671 icount.parity = cnow.parity; 1672 icount.brk = cnow.brk; 1673 icount.buf_overrun = cnow.buf_overrun; 1674 1675 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1676 } 1677 1678 1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1680 { 1681 int retval; 1682 struct hso_serial *serial = get_serial_by_tty(tty); 1683 struct hso_tiocmget *tiocmget; 1684 u16 UART_state_bitmap; 1685 1686 /* sanity check */ 1687 if (!serial) { 1688 D1("no tty structures"); 1689 return -EINVAL; 1690 } 1691 spin_lock_irq(&serial->serial_lock); 1692 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1693 ((serial->dtr_state) ? TIOCM_DTR : 0); 1694 tiocmget = serial->tiocmget; 1695 if (tiocmget) { 1696 1697 UART_state_bitmap = le16_to_cpu( 1698 tiocmget->prev_UART_state_bitmap); 1699 if (UART_state_bitmap & B_RING_SIGNAL) 1700 retval |= TIOCM_RNG; 1701 if (UART_state_bitmap & B_RX_CARRIER) 1702 retval |= TIOCM_CD; 1703 if (UART_state_bitmap & B_TX_CARRIER) 1704 retval |= TIOCM_DSR; 1705 } 1706 spin_unlock_irq(&serial->serial_lock); 1707 return retval; 1708 } 1709 1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1711 unsigned int set, unsigned int clear) 1712 { 1713 int val = 0; 1714 unsigned long flags; 1715 int if_num; 1716 struct hso_serial *serial = get_serial_by_tty(tty); 1717 1718 /* sanity check */ 1719 if (!serial) { 1720 D1("no tty structures"); 1721 return -EINVAL; 1722 } 1723 1724 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1725 return -EINVAL; 1726 1727 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1728 1729 spin_lock_irqsave(&serial->serial_lock, flags); 1730 if (set & TIOCM_RTS) 1731 serial->rts_state = 1; 1732 if (set & TIOCM_DTR) 1733 serial->dtr_state = 1; 1734 1735 if (clear & TIOCM_RTS) 1736 serial->rts_state = 0; 1737 if (clear & TIOCM_DTR) 1738 serial->dtr_state = 0; 1739 1740 if (serial->dtr_state) 1741 val |= 0x01; 1742 if (serial->rts_state) 1743 val |= 0x02; 1744 1745 spin_unlock_irqrestore(&serial->serial_lock, flags); 1746 1747 return usb_control_msg(serial->parent->usb, 1748 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1749 0x21, val, if_num, NULL, 0, 1750 USB_CTRL_SET_TIMEOUT); 1751 } 1752 1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1754 unsigned int cmd, unsigned long arg) 1755 { 1756 struct hso_serial *serial = get_serial_by_tty(tty); 1757 void __user *uarg = (void __user *)arg; 1758 int ret = 0; 1759 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1760 1761 if (!serial) 1762 return -ENODEV; 1763 switch (cmd) { 1764 case TIOCMIWAIT: 1765 ret = hso_wait_modem_status(serial, arg); 1766 break; 1767 1768 case TIOCGICOUNT: 1769 ret = hso_get_count(serial, uarg); 1770 break; 1771 default: 1772 ret = -ENOIOCTLCMD; 1773 break; 1774 } 1775 return ret; 1776 } 1777 1778 1779 /* starts a transmit */ 1780 static void hso_kick_transmit(struct hso_serial *serial) 1781 { 1782 u8 *temp; 1783 unsigned long flags; 1784 int res; 1785 1786 spin_lock_irqsave(&serial->serial_lock, flags); 1787 if (!serial->tx_buffer_count) 1788 goto out; 1789 1790 if (serial->tx_urb_used) 1791 goto out; 1792 1793 /* Wakeup USB interface if necessary */ 1794 if (hso_get_activity(serial->parent) == -EAGAIN) 1795 goto out; 1796 1797 /* Switch pointers around to avoid memcpy */ 1798 temp = serial->tx_buffer; 1799 serial->tx_buffer = serial->tx_data; 1800 serial->tx_data = temp; 1801 serial->tx_data_count = serial->tx_buffer_count; 1802 serial->tx_buffer_count = 0; 1803 1804 /* If temp is set, it means we switched buffers */ 1805 if (temp && serial->write_data) { 1806 res = serial->write_data(serial); 1807 if (res >= 0) 1808 serial->tx_urb_used = 1; 1809 } 1810 out: 1811 spin_unlock_irqrestore(&serial->serial_lock, flags); 1812 } 1813 1814 /* make a request (for reading and writing data to muxed serial port) */ 1815 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1816 struct urb *ctrl_urb, 1817 struct usb_ctrlrequest *ctrl_req, 1818 u8 *ctrl_urb_data, u32 size) 1819 { 1820 int result; 1821 int pipe; 1822 1823 /* Sanity check */ 1824 if (!serial || !ctrl_urb || !ctrl_req) { 1825 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1826 return -EINVAL; 1827 } 1828 1829 /* initialize */ 1830 ctrl_req->wValue = 0; 1831 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1832 ctrl_req->wLength = cpu_to_le16(size); 1833 1834 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1835 /* Reading command */ 1836 ctrl_req->bRequestType = USB_DIR_IN | 1837 USB_TYPE_OPTION_VENDOR | 1838 USB_RECIP_INTERFACE; 1839 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1840 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1841 } else { 1842 /* Writing command */ 1843 ctrl_req->bRequestType = USB_DIR_OUT | 1844 USB_TYPE_OPTION_VENDOR | 1845 USB_RECIP_INTERFACE; 1846 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1847 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1848 } 1849 /* syslog */ 1850 D2("%s command (%02x) len: %d, port: %d", 1851 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1852 ctrl_req->bRequestType, ctrl_req->wLength, port); 1853 1854 /* Load ctrl urb */ 1855 ctrl_urb->transfer_flags = 0; 1856 usb_fill_control_urb(ctrl_urb, 1857 serial->parent->usb, 1858 pipe, 1859 (u8 *) ctrl_req, 1860 ctrl_urb_data, size, ctrl_callback, serial); 1861 /* Send it on merry way */ 1862 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1863 if (result) { 1864 dev_err(&ctrl_urb->dev->dev, 1865 "%s failed submit ctrl_urb %d type %d\n", __func__, 1866 result, type); 1867 return result; 1868 } 1869 1870 /* done */ 1871 return size; 1872 } 1873 1874 /* called by intr_callback when read occurs */ 1875 static int hso_mux_serial_read(struct hso_serial *serial) 1876 { 1877 if (!serial) 1878 return -EINVAL; 1879 1880 /* clean data */ 1881 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1882 /* make the request */ 1883 1884 if (serial->num_rx_urbs != 1) { 1885 dev_err(&serial->parent->interface->dev, 1886 "ERROR: mux'd reads with multiple buffers " 1887 "not possible\n"); 1888 return 0; 1889 } 1890 return mux_device_request(serial, 1891 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1892 serial->parent->port_spec & HSO_PORT_MASK, 1893 serial->rx_urb[0], 1894 &serial->ctrl_req_rx, 1895 serial->rx_data[0], serial->rx_data_length); 1896 } 1897 1898 /* used for muxed serial port callback (muxed serial read) */ 1899 static void intr_callback(struct urb *urb) 1900 { 1901 struct hso_shared_int *shared_int = urb->context; 1902 struct hso_serial *serial; 1903 unsigned char *port_req; 1904 int status = urb->status; 1905 int i; 1906 1907 usb_mark_last_busy(urb->dev); 1908 1909 /* sanity check */ 1910 if (!shared_int) 1911 return; 1912 1913 /* status check */ 1914 if (status) { 1915 handle_usb_error(status, __func__, NULL); 1916 return; 1917 } 1918 D4("\n--- Got intr callback 0x%02X ---", status); 1919 1920 /* what request? */ 1921 port_req = urb->transfer_buffer; 1922 D4(" port_req = 0x%.2X\n", *port_req); 1923 /* loop over all muxed ports to find the one sending this */ 1924 for (i = 0; i < 8; i++) { 1925 /* max 8 channels on MUX */ 1926 if (*port_req & (1 << i)) { 1927 serial = get_serial_by_shared_int_and_type(shared_int, 1928 (1 << i)); 1929 if (serial != NULL) { 1930 D1("Pending read interrupt on port %d\n", i); 1931 spin_lock(&serial->serial_lock); 1932 if (serial->rx_state == RX_IDLE && 1933 serial->open_count > 0) { 1934 /* Setup and send a ctrl req read on 1935 * port i */ 1936 if (!serial->rx_urb_filled[0]) { 1937 serial->rx_state = RX_SENT; 1938 hso_mux_serial_read(serial); 1939 } else 1940 serial->rx_state = RX_PENDING; 1941 } else { 1942 D1("Already a read pending on " 1943 "port %d or port not open\n", i); 1944 } 1945 spin_unlock(&serial->serial_lock); 1946 } 1947 } 1948 } 1949 /* Resubmit interrupt urb */ 1950 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1951 } 1952 1953 /* called for writing to muxed serial port */ 1954 static int hso_mux_serial_write_data(struct hso_serial *serial) 1955 { 1956 if (NULL == serial) 1957 return -EINVAL; 1958 1959 return mux_device_request(serial, 1960 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1961 serial->parent->port_spec & HSO_PORT_MASK, 1962 serial->tx_urb, 1963 &serial->ctrl_req_tx, 1964 serial->tx_data, serial->tx_data_count); 1965 } 1966 1967 /* write callback for Diag and CS port */ 1968 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1969 { 1970 struct hso_serial *serial = urb->context; 1971 int status = urb->status; 1972 struct tty_struct *tty; 1973 1974 /* sanity check */ 1975 if (!serial) { 1976 D1("serial == NULL"); 1977 return; 1978 } 1979 1980 spin_lock(&serial->serial_lock); 1981 serial->tx_urb_used = 0; 1982 tty = tty_kref_get(serial->tty); 1983 spin_unlock(&serial->serial_lock); 1984 if (status) { 1985 handle_usb_error(status, __func__, serial->parent); 1986 tty_kref_put(tty); 1987 return; 1988 } 1989 hso_put_activity(serial->parent); 1990 if (tty) { 1991 tty_wakeup(tty); 1992 tty_kref_put(tty); 1993 } 1994 hso_kick_transmit(serial); 1995 1996 D1(" "); 1997 } 1998 1999 /* called for writing diag or CS serial port */ 2000 static int hso_std_serial_write_data(struct hso_serial *serial) 2001 { 2002 int count = serial->tx_data_count; 2003 int result; 2004 2005 usb_fill_bulk_urb(serial->tx_urb, 2006 serial->parent->usb, 2007 usb_sndbulkpipe(serial->parent->usb, 2008 serial->out_endp-> 2009 bEndpointAddress & 0x7F), 2010 serial->tx_data, serial->tx_data_count, 2011 hso_std_serial_write_bulk_callback, serial); 2012 2013 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2014 if (result) { 2015 dev_warn(&serial->parent->usb->dev, 2016 "Failed to submit urb - res %d\n", result); 2017 return result; 2018 } 2019 2020 return count; 2021 } 2022 2023 /* callback after read or write on muxed serial port */ 2024 static void ctrl_callback(struct urb *urb) 2025 { 2026 struct hso_serial *serial = urb->context; 2027 struct usb_ctrlrequest *req; 2028 int status = urb->status; 2029 struct tty_struct *tty; 2030 2031 /* sanity check */ 2032 if (!serial) 2033 return; 2034 2035 spin_lock(&serial->serial_lock); 2036 serial->tx_urb_used = 0; 2037 tty = tty_kref_get(serial->tty); 2038 spin_unlock(&serial->serial_lock); 2039 if (status) { 2040 handle_usb_error(status, __func__, serial->parent); 2041 tty_kref_put(tty); 2042 return; 2043 } 2044 2045 /* what request? */ 2046 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2047 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2048 D4("Actual length of urb = %d\n", urb->actual_length); 2049 DUMP1(urb->transfer_buffer, urb->actual_length); 2050 2051 if (req->bRequestType == 2052 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2053 /* response to a read command */ 2054 serial->rx_urb_filled[0] = 1; 2055 spin_lock(&serial->serial_lock); 2056 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2057 spin_unlock(&serial->serial_lock); 2058 } else { 2059 hso_put_activity(serial->parent); 2060 if (tty) 2061 tty_wakeup(tty); 2062 /* response to a write command */ 2063 hso_kick_transmit(serial); 2064 } 2065 tty_kref_put(tty); 2066 } 2067 2068 /* handle RX data for serial port */ 2069 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2070 { 2071 struct tty_struct *tty; 2072 int write_length_remaining = 0; 2073 int curr_write_len; 2074 2075 /* Sanity check */ 2076 if (urb == NULL || serial == NULL) { 2077 D1("serial = NULL"); 2078 return -2; 2079 } 2080 2081 /* All callers to put_rxbuf_data hold serial_lock */ 2082 tty = tty_kref_get(serial->tty); 2083 2084 /* Push data to tty */ 2085 if (tty) { 2086 write_length_remaining = urb->actual_length - 2087 serial->curr_rx_urb_offset; 2088 D1("data to push to tty"); 2089 while (write_length_remaining) { 2090 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2091 tty_kref_put(tty); 2092 return -1; 2093 } 2094 curr_write_len = tty_insert_flip_string 2095 (tty, urb->transfer_buffer + 2096 serial->curr_rx_urb_offset, 2097 write_length_remaining); 2098 serial->curr_rx_urb_offset += curr_write_len; 2099 write_length_remaining -= curr_write_len; 2100 tty_flip_buffer_push(tty); 2101 } 2102 } 2103 if (write_length_remaining == 0) { 2104 serial->curr_rx_urb_offset = 0; 2105 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2106 } 2107 tty_kref_put(tty); 2108 return write_length_remaining; 2109 } 2110 2111 2112 /* Base driver functions */ 2113 2114 static void hso_log_port(struct hso_device *hso_dev) 2115 { 2116 char *port_type; 2117 char port_dev[20]; 2118 2119 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2120 case HSO_PORT_CONTROL: 2121 port_type = "Control"; 2122 break; 2123 case HSO_PORT_APP: 2124 port_type = "Application"; 2125 break; 2126 case HSO_PORT_GPS: 2127 port_type = "GPS"; 2128 break; 2129 case HSO_PORT_GPS_CONTROL: 2130 port_type = "GPS control"; 2131 break; 2132 case HSO_PORT_APP2: 2133 port_type = "Application2"; 2134 break; 2135 case HSO_PORT_PCSC: 2136 port_type = "PCSC"; 2137 break; 2138 case HSO_PORT_DIAG: 2139 port_type = "Diagnostic"; 2140 break; 2141 case HSO_PORT_DIAG2: 2142 port_type = "Diagnostic2"; 2143 break; 2144 case HSO_PORT_MODEM: 2145 port_type = "Modem"; 2146 break; 2147 case HSO_PORT_NETWORK: 2148 port_type = "Network"; 2149 break; 2150 default: 2151 port_type = "Unknown"; 2152 break; 2153 } 2154 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2155 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2156 } else 2157 sprintf(port_dev, "/dev/%s%d", tty_filename, 2158 dev2ser(hso_dev)->minor); 2159 2160 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2161 port_type, port_dev); 2162 } 2163 2164 static int hso_start_net_device(struct hso_device *hso_dev) 2165 { 2166 int i, result = 0; 2167 struct hso_net *hso_net = dev2net(hso_dev); 2168 2169 if (!hso_net) 2170 return -ENODEV; 2171 2172 /* send URBs for all read buffers */ 2173 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2174 2175 /* Prep a receive URB */ 2176 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2177 hso_dev->usb, 2178 usb_rcvbulkpipe(hso_dev->usb, 2179 hso_net->in_endp-> 2180 bEndpointAddress & 0x7F), 2181 hso_net->mux_bulk_rx_buf_pool[i], 2182 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2183 hso_net); 2184 2185 /* Put it out there so the device can send us stuff */ 2186 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2187 GFP_NOIO); 2188 if (result) 2189 dev_warn(&hso_dev->usb->dev, 2190 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2191 i, result); 2192 } 2193 2194 return result; 2195 } 2196 2197 static int hso_stop_net_device(struct hso_device *hso_dev) 2198 { 2199 int i; 2200 struct hso_net *hso_net = dev2net(hso_dev); 2201 2202 if (!hso_net) 2203 return -ENODEV; 2204 2205 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2206 if (hso_net->mux_bulk_rx_urb_pool[i]) 2207 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2208 2209 } 2210 if (hso_net->mux_bulk_tx_urb) 2211 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2212 2213 return 0; 2214 } 2215 2216 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2217 { 2218 int i, result = 0; 2219 struct hso_serial *serial = dev2ser(hso_dev); 2220 2221 if (!serial) 2222 return -ENODEV; 2223 2224 /* If it is not the MUX port fill in and submit a bulk urb (already 2225 * allocated in hso_serial_start) */ 2226 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2227 for (i = 0; i < serial->num_rx_urbs; i++) { 2228 usb_fill_bulk_urb(serial->rx_urb[i], 2229 serial->parent->usb, 2230 usb_rcvbulkpipe(serial->parent->usb, 2231 serial->in_endp-> 2232 bEndpointAddress & 2233 0x7F), 2234 serial->rx_data[i], 2235 serial->rx_data_length, 2236 hso_std_serial_read_bulk_callback, 2237 serial); 2238 result = usb_submit_urb(serial->rx_urb[i], flags); 2239 if (result) { 2240 dev_warn(&serial->parent->usb->dev, 2241 "Failed to submit urb - res %d\n", 2242 result); 2243 break; 2244 } 2245 } 2246 } else { 2247 mutex_lock(&serial->shared_int->shared_int_lock); 2248 if (!serial->shared_int->use_count) { 2249 result = 2250 hso_mux_submit_intr_urb(serial->shared_int, 2251 hso_dev->usb, flags); 2252 } 2253 serial->shared_int->use_count++; 2254 mutex_unlock(&serial->shared_int->shared_int_lock); 2255 } 2256 if (serial->tiocmget) 2257 tiocmget_submit_urb(serial, 2258 serial->tiocmget, 2259 serial->parent->usb); 2260 return result; 2261 } 2262 2263 static int hso_stop_serial_device(struct hso_device *hso_dev) 2264 { 2265 int i; 2266 struct hso_serial *serial = dev2ser(hso_dev); 2267 struct hso_tiocmget *tiocmget; 2268 2269 if (!serial) 2270 return -ENODEV; 2271 2272 for (i = 0; i < serial->num_rx_urbs; i++) { 2273 if (serial->rx_urb[i]) { 2274 usb_kill_urb(serial->rx_urb[i]); 2275 serial->rx_urb_filled[i] = 0; 2276 } 2277 } 2278 serial->curr_rx_urb_idx = 0; 2279 serial->curr_rx_urb_offset = 0; 2280 2281 if (serial->tx_urb) 2282 usb_kill_urb(serial->tx_urb); 2283 2284 if (serial->shared_int) { 2285 mutex_lock(&serial->shared_int->shared_int_lock); 2286 if (serial->shared_int->use_count && 2287 (--serial->shared_int->use_count == 0)) { 2288 struct urb *urb; 2289 2290 urb = serial->shared_int->shared_intr_urb; 2291 if (urb) 2292 usb_kill_urb(urb); 2293 } 2294 mutex_unlock(&serial->shared_int->shared_int_lock); 2295 } 2296 tiocmget = serial->tiocmget; 2297 if (tiocmget) { 2298 wake_up_interruptible(&tiocmget->waitq); 2299 usb_kill_urb(tiocmget->urb); 2300 } 2301 2302 return 0; 2303 } 2304 2305 static void hso_serial_common_free(struct hso_serial *serial) 2306 { 2307 int i; 2308 2309 if (serial->parent->dev) 2310 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2311 2312 tty_unregister_device(tty_drv, serial->minor); 2313 2314 for (i = 0; i < serial->num_rx_urbs; i++) { 2315 /* unlink and free RX URB */ 2316 usb_free_urb(serial->rx_urb[i]); 2317 /* free the RX buffer */ 2318 kfree(serial->rx_data[i]); 2319 } 2320 2321 /* unlink and free TX URB */ 2322 usb_free_urb(serial->tx_urb); 2323 kfree(serial->tx_data); 2324 } 2325 2326 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2327 int rx_size, int tx_size) 2328 { 2329 struct device *dev; 2330 int minor; 2331 int i; 2332 2333 minor = get_free_serial_index(); 2334 if (minor < 0) 2335 goto exit; 2336 2337 /* register our minor number */ 2338 serial->parent->dev = tty_register_device(tty_drv, minor, 2339 &serial->parent->interface->dev); 2340 dev = serial->parent->dev; 2341 dev_set_drvdata(dev, serial->parent); 2342 i = device_create_file(dev, &dev_attr_hsotype); 2343 2344 /* fill in specific data for later use */ 2345 serial->minor = minor; 2346 serial->magic = HSO_SERIAL_MAGIC; 2347 spin_lock_init(&serial->serial_lock); 2348 serial->num_rx_urbs = num_urbs; 2349 2350 /* RX, allocate urb and initialize */ 2351 2352 /* prepare our RX buffer */ 2353 serial->rx_data_length = rx_size; 2354 for (i = 0; i < serial->num_rx_urbs; i++) { 2355 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2356 if (!serial->rx_urb[i]) { 2357 dev_err(dev, "Could not allocate urb?\n"); 2358 goto exit; 2359 } 2360 serial->rx_urb[i]->transfer_buffer = NULL; 2361 serial->rx_urb[i]->transfer_buffer_length = 0; 2362 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2363 GFP_KERNEL); 2364 if (!serial->rx_data[i]) { 2365 dev_err(dev, "%s - Out of memory\n", __func__); 2366 goto exit; 2367 } 2368 } 2369 2370 /* TX, allocate urb and initialize */ 2371 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2372 if (!serial->tx_urb) { 2373 dev_err(dev, "Could not allocate urb?\n"); 2374 goto exit; 2375 } 2376 serial->tx_urb->transfer_buffer = NULL; 2377 serial->tx_urb->transfer_buffer_length = 0; 2378 /* prepare our TX buffer */ 2379 serial->tx_data_count = 0; 2380 serial->tx_buffer_count = 0; 2381 serial->tx_data_length = tx_size; 2382 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2383 if (!serial->tx_data) { 2384 dev_err(dev, "%s - Out of memory\n", __func__); 2385 goto exit; 2386 } 2387 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2388 if (!serial->tx_buffer) { 2389 dev_err(dev, "%s - Out of memory\n", __func__); 2390 goto exit; 2391 } 2392 2393 return 0; 2394 exit: 2395 hso_serial_common_free(serial); 2396 return -1; 2397 } 2398 2399 /* Creates a general hso device */ 2400 static struct hso_device *hso_create_device(struct usb_interface *intf, 2401 int port_spec) 2402 { 2403 struct hso_device *hso_dev; 2404 2405 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2406 if (!hso_dev) 2407 return NULL; 2408 2409 hso_dev->port_spec = port_spec; 2410 hso_dev->usb = interface_to_usbdev(intf); 2411 hso_dev->interface = intf; 2412 kref_init(&hso_dev->ref); 2413 mutex_init(&hso_dev->mutex); 2414 2415 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2416 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2417 INIT_WORK(&hso_dev->reset_device, reset_device); 2418 2419 return hso_dev; 2420 } 2421 2422 /* Removes a network device in the network device table */ 2423 static int remove_net_device(struct hso_device *hso_dev) 2424 { 2425 int i; 2426 2427 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2428 if (network_table[i] == hso_dev) { 2429 network_table[i] = NULL; 2430 break; 2431 } 2432 } 2433 if (i == HSO_MAX_NET_DEVICES) 2434 return -1; 2435 return 0; 2436 } 2437 2438 /* Frees our network device */ 2439 static void hso_free_net_device(struct hso_device *hso_dev) 2440 { 2441 int i; 2442 struct hso_net *hso_net = dev2net(hso_dev); 2443 2444 if (!hso_net) 2445 return; 2446 2447 remove_net_device(hso_net->parent); 2448 2449 if (hso_net->net) { 2450 unregister_netdev(hso_net->net); 2451 free_netdev(hso_net->net); 2452 } 2453 2454 /* start freeing */ 2455 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2456 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2457 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2458 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2459 } 2460 usb_free_urb(hso_net->mux_bulk_tx_urb); 2461 kfree(hso_net->mux_bulk_tx_buf); 2462 hso_net->mux_bulk_tx_buf = NULL; 2463 2464 kfree(hso_dev); 2465 } 2466 2467 static const struct net_device_ops hso_netdev_ops = { 2468 .ndo_open = hso_net_open, 2469 .ndo_stop = hso_net_close, 2470 .ndo_start_xmit = hso_net_start_xmit, 2471 .ndo_tx_timeout = hso_net_tx_timeout, 2472 }; 2473 2474 /* initialize the network interface */ 2475 static void hso_net_init(struct net_device *net) 2476 { 2477 struct hso_net *hso_net = netdev_priv(net); 2478 2479 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2480 2481 /* fill in the other fields */ 2482 net->netdev_ops = &hso_netdev_ops; 2483 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2484 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2485 net->type = ARPHRD_NONE; 2486 net->mtu = DEFAULT_MTU - 14; 2487 net->tx_queue_len = 10; 2488 SET_ETHTOOL_OPS(net, &ops); 2489 2490 /* and initialize the semaphore */ 2491 spin_lock_init(&hso_net->net_lock); 2492 } 2493 2494 /* Adds a network device in the network device table */ 2495 static int add_net_device(struct hso_device *hso_dev) 2496 { 2497 int i; 2498 2499 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2500 if (network_table[i] == NULL) { 2501 network_table[i] = hso_dev; 2502 break; 2503 } 2504 } 2505 if (i == HSO_MAX_NET_DEVICES) 2506 return -1; 2507 return 0; 2508 } 2509 2510 static int hso_rfkill_set_block(void *data, bool blocked) 2511 { 2512 struct hso_device *hso_dev = data; 2513 int enabled = !blocked; 2514 int rv; 2515 2516 mutex_lock(&hso_dev->mutex); 2517 if (hso_dev->usb_gone) 2518 rv = 0; 2519 else 2520 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2521 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2522 USB_CTRL_SET_TIMEOUT); 2523 mutex_unlock(&hso_dev->mutex); 2524 return rv; 2525 } 2526 2527 static const struct rfkill_ops hso_rfkill_ops = { 2528 .set_block = hso_rfkill_set_block, 2529 }; 2530 2531 /* Creates and sets up everything for rfkill */ 2532 static void hso_create_rfkill(struct hso_device *hso_dev, 2533 struct usb_interface *interface) 2534 { 2535 struct hso_net *hso_net = dev2net(hso_dev); 2536 struct device *dev = &hso_net->net->dev; 2537 char *rfkn; 2538 2539 rfkn = kzalloc(20, GFP_KERNEL); 2540 if (!rfkn) 2541 dev_err(dev, "%s - Out of memory\n", __func__); 2542 2543 snprintf(rfkn, 20, "hso-%d", 2544 interface->altsetting->desc.bInterfaceNumber); 2545 2546 hso_net->rfkill = rfkill_alloc(rfkn, 2547 &interface_to_usbdev(interface)->dev, 2548 RFKILL_TYPE_WWAN, 2549 &hso_rfkill_ops, hso_dev); 2550 if (!hso_net->rfkill) { 2551 dev_err(dev, "%s - Out of memory\n", __func__); 2552 kfree(rfkn); 2553 return; 2554 } 2555 if (rfkill_register(hso_net->rfkill) < 0) { 2556 rfkill_destroy(hso_net->rfkill); 2557 kfree(rfkn); 2558 hso_net->rfkill = NULL; 2559 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2560 return; 2561 } 2562 } 2563 2564 static struct device_type hso_type = { 2565 .name = "wwan", 2566 }; 2567 2568 /* Creates our network device */ 2569 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2570 int port_spec) 2571 { 2572 int result, i; 2573 struct net_device *net; 2574 struct hso_net *hso_net; 2575 struct hso_device *hso_dev; 2576 2577 hso_dev = hso_create_device(interface, port_spec); 2578 if (!hso_dev) 2579 return NULL; 2580 2581 /* allocate our network device, then we can put in our private data */ 2582 /* call hso_net_init to do the basic initialization */ 2583 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2584 if (!net) { 2585 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2586 goto exit; 2587 } 2588 2589 hso_net = netdev_priv(net); 2590 2591 hso_dev->port_data.dev_net = hso_net; 2592 hso_net->net = net; 2593 hso_net->parent = hso_dev; 2594 2595 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2596 USB_DIR_IN); 2597 if (!hso_net->in_endp) { 2598 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2599 goto exit; 2600 } 2601 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2602 USB_DIR_OUT); 2603 if (!hso_net->out_endp) { 2604 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2605 goto exit; 2606 } 2607 SET_NETDEV_DEV(net, &interface->dev); 2608 SET_NETDEV_DEVTYPE(net, &hso_type); 2609 2610 /* registering our net device */ 2611 result = register_netdev(net); 2612 if (result) { 2613 dev_err(&interface->dev, "Failed to register device\n"); 2614 goto exit; 2615 } 2616 2617 /* start allocating */ 2618 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2619 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2620 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2621 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2622 goto exit; 2623 } 2624 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2625 GFP_KERNEL); 2626 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2627 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2628 goto exit; 2629 } 2630 } 2631 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2632 if (!hso_net->mux_bulk_tx_urb) { 2633 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2634 goto exit; 2635 } 2636 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2637 if (!hso_net->mux_bulk_tx_buf) { 2638 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2639 goto exit; 2640 } 2641 2642 add_net_device(hso_dev); 2643 2644 hso_log_port(hso_dev); 2645 2646 hso_create_rfkill(hso_dev, interface); 2647 2648 return hso_dev; 2649 exit: 2650 hso_free_net_device(hso_dev); 2651 return NULL; 2652 } 2653 2654 static void hso_free_tiomget(struct hso_serial *serial) 2655 { 2656 struct hso_tiocmget *tiocmget = serial->tiocmget; 2657 if (tiocmget) { 2658 if (tiocmget->urb) { 2659 usb_free_urb(tiocmget->urb); 2660 tiocmget->urb = NULL; 2661 } 2662 serial->tiocmget = NULL; 2663 kfree(tiocmget); 2664 2665 } 2666 } 2667 2668 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2669 static void hso_free_serial_device(struct hso_device *hso_dev) 2670 { 2671 struct hso_serial *serial = dev2ser(hso_dev); 2672 2673 if (!serial) 2674 return; 2675 set_serial_by_index(serial->minor, NULL); 2676 2677 hso_serial_common_free(serial); 2678 2679 if (serial->shared_int) { 2680 mutex_lock(&serial->shared_int->shared_int_lock); 2681 if (--serial->shared_int->ref_count == 0) 2682 hso_free_shared_int(serial->shared_int); 2683 else 2684 mutex_unlock(&serial->shared_int->shared_int_lock); 2685 } 2686 hso_free_tiomget(serial); 2687 kfree(serial); 2688 kfree(hso_dev); 2689 } 2690 2691 /* Creates a bulk AT channel */ 2692 static struct hso_device *hso_create_bulk_serial_device( 2693 struct usb_interface *interface, int port) 2694 { 2695 struct hso_device *hso_dev; 2696 struct hso_serial *serial; 2697 int num_urbs; 2698 struct hso_tiocmget *tiocmget; 2699 2700 hso_dev = hso_create_device(interface, port); 2701 if (!hso_dev) 2702 return NULL; 2703 2704 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2705 if (!serial) 2706 goto exit; 2707 2708 serial->parent = hso_dev; 2709 hso_dev->port_data.dev_serial = serial; 2710 2711 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2712 num_urbs = 2; 2713 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2714 GFP_KERNEL); 2715 /* it isn't going to break our heart if serial->tiocmget 2716 * allocation fails don't bother checking this. 2717 */ 2718 if (serial->tiocmget) { 2719 tiocmget = serial->tiocmget; 2720 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2721 if (tiocmget->urb) { 2722 mutex_init(&tiocmget->mutex); 2723 init_waitqueue_head(&tiocmget->waitq); 2724 tiocmget->endp = hso_get_ep( 2725 interface, 2726 USB_ENDPOINT_XFER_INT, 2727 USB_DIR_IN); 2728 } else 2729 hso_free_tiomget(serial); 2730 } 2731 } 2732 else 2733 num_urbs = 1; 2734 2735 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2736 BULK_URB_TX_SIZE)) 2737 goto exit; 2738 2739 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2740 USB_DIR_IN); 2741 if (!serial->in_endp) { 2742 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2743 goto exit2; 2744 } 2745 2746 if (! 2747 (serial->out_endp = 2748 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2749 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2750 goto exit2; 2751 } 2752 2753 serial->write_data = hso_std_serial_write_data; 2754 2755 /* and record this serial */ 2756 set_serial_by_index(serial->minor, serial); 2757 2758 /* setup the proc dirs and files if needed */ 2759 hso_log_port(hso_dev); 2760 2761 /* done, return it */ 2762 return hso_dev; 2763 2764 exit2: 2765 hso_serial_common_free(serial); 2766 exit: 2767 hso_free_tiomget(serial); 2768 kfree(serial); 2769 kfree(hso_dev); 2770 return NULL; 2771 } 2772 2773 /* Creates a multiplexed AT channel */ 2774 static 2775 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2776 int port, 2777 struct hso_shared_int *mux) 2778 { 2779 struct hso_device *hso_dev; 2780 struct hso_serial *serial; 2781 int port_spec; 2782 2783 port_spec = HSO_INTF_MUX; 2784 port_spec &= ~HSO_PORT_MASK; 2785 2786 port_spec |= hso_mux_to_port(port); 2787 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2788 return NULL; 2789 2790 hso_dev = hso_create_device(interface, port_spec); 2791 if (!hso_dev) 2792 return NULL; 2793 2794 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2795 if (!serial) 2796 goto exit; 2797 2798 hso_dev->port_data.dev_serial = serial; 2799 serial->parent = hso_dev; 2800 2801 if (hso_serial_common_create 2802 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2803 goto exit; 2804 2805 serial->tx_data_length--; 2806 serial->write_data = hso_mux_serial_write_data; 2807 2808 serial->shared_int = mux; 2809 mutex_lock(&serial->shared_int->shared_int_lock); 2810 serial->shared_int->ref_count++; 2811 mutex_unlock(&serial->shared_int->shared_int_lock); 2812 2813 /* and record this serial */ 2814 set_serial_by_index(serial->minor, serial); 2815 2816 /* setup the proc dirs and files if needed */ 2817 hso_log_port(hso_dev); 2818 2819 /* done, return it */ 2820 return hso_dev; 2821 2822 exit: 2823 if (serial) { 2824 tty_unregister_device(tty_drv, serial->minor); 2825 kfree(serial); 2826 } 2827 if (hso_dev) 2828 kfree(hso_dev); 2829 return NULL; 2830 2831 } 2832 2833 static void hso_free_shared_int(struct hso_shared_int *mux) 2834 { 2835 usb_free_urb(mux->shared_intr_urb); 2836 kfree(mux->shared_intr_buf); 2837 mutex_unlock(&mux->shared_int_lock); 2838 kfree(mux); 2839 } 2840 2841 static 2842 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2843 { 2844 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2845 2846 if (!mux) 2847 return NULL; 2848 2849 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2850 USB_DIR_IN); 2851 if (!mux->intr_endp) { 2852 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2853 goto exit; 2854 } 2855 2856 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2857 if (!mux->shared_intr_urb) { 2858 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2859 goto exit; 2860 } 2861 mux->shared_intr_buf = 2862 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2863 GFP_KERNEL); 2864 if (!mux->shared_intr_buf) { 2865 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2866 goto exit; 2867 } 2868 2869 mutex_init(&mux->shared_int_lock); 2870 2871 return mux; 2872 2873 exit: 2874 kfree(mux->shared_intr_buf); 2875 usb_free_urb(mux->shared_intr_urb); 2876 kfree(mux); 2877 return NULL; 2878 } 2879 2880 /* Gets the port spec for a certain interface */ 2881 static int hso_get_config_data(struct usb_interface *interface) 2882 { 2883 struct usb_device *usbdev = interface_to_usbdev(interface); 2884 u8 config_data[17]; 2885 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2886 s32 result; 2887 2888 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2889 0x86, 0xC0, 0, 0, config_data, 17, 2890 USB_CTRL_SET_TIMEOUT) != 0x11) { 2891 return -EIO; 2892 } 2893 2894 switch (config_data[if_num]) { 2895 case 0x0: 2896 result = 0; 2897 break; 2898 case 0x1: 2899 result = HSO_PORT_DIAG; 2900 break; 2901 case 0x2: 2902 result = HSO_PORT_GPS; 2903 break; 2904 case 0x3: 2905 result = HSO_PORT_GPS_CONTROL; 2906 break; 2907 case 0x4: 2908 result = HSO_PORT_APP; 2909 break; 2910 case 0x5: 2911 result = HSO_PORT_APP2; 2912 break; 2913 case 0x6: 2914 result = HSO_PORT_CONTROL; 2915 break; 2916 case 0x7: 2917 result = HSO_PORT_NETWORK; 2918 break; 2919 case 0x8: 2920 result = HSO_PORT_MODEM; 2921 break; 2922 case 0x9: 2923 result = HSO_PORT_MSD; 2924 break; 2925 case 0xa: 2926 result = HSO_PORT_PCSC; 2927 break; 2928 case 0xb: 2929 result = HSO_PORT_VOICE; 2930 break; 2931 default: 2932 result = 0; 2933 } 2934 2935 if (result) 2936 result |= HSO_INTF_BULK; 2937 2938 if (config_data[16] & 0x1) 2939 result |= HSO_INFO_CRC_BUG; 2940 2941 return result; 2942 } 2943 2944 /* called once for each interface upon device insertion */ 2945 static int hso_probe(struct usb_interface *interface, 2946 const struct usb_device_id *id) 2947 { 2948 int mux, i, if_num, port_spec; 2949 unsigned char port_mask; 2950 struct hso_device *hso_dev = NULL; 2951 struct hso_shared_int *shared_int; 2952 struct hso_device *tmp_dev = NULL; 2953 2954 if_num = interface->altsetting->desc.bInterfaceNumber; 2955 2956 /* Get the interface/port specification from either driver_info or from 2957 * the device itself */ 2958 if (id->driver_info) 2959 port_spec = ((u32 *)(id->driver_info))[if_num]; 2960 else 2961 port_spec = hso_get_config_data(interface); 2962 2963 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2964 dev_err(&interface->dev, "Not our interface\n"); 2965 return -ENODEV; 2966 } 2967 /* Check if we need to switch to alt interfaces prior to port 2968 * configuration */ 2969 if (interface->num_altsetting > 1) 2970 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2971 interface->needs_remote_wakeup = 1; 2972 2973 /* Allocate new hso device(s) */ 2974 switch (port_spec & HSO_INTF_MASK) { 2975 case HSO_INTF_MUX: 2976 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2977 /* Create the network device */ 2978 if (!disable_net) { 2979 hso_dev = hso_create_net_device(interface, 2980 port_spec); 2981 if (!hso_dev) 2982 goto exit; 2983 tmp_dev = hso_dev; 2984 } 2985 } 2986 2987 if (hso_get_mux_ports(interface, &port_mask)) 2988 /* TODO: de-allocate everything */ 2989 goto exit; 2990 2991 shared_int = hso_create_shared_int(interface); 2992 if (!shared_int) 2993 goto exit; 2994 2995 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2996 if (port_mask & i) { 2997 hso_dev = hso_create_mux_serial_device( 2998 interface, i, shared_int); 2999 if (!hso_dev) 3000 goto exit; 3001 } 3002 } 3003 3004 if (tmp_dev) 3005 hso_dev = tmp_dev; 3006 break; 3007 3008 case HSO_INTF_BULK: 3009 /* It's a regular bulk interface */ 3010 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 3011 !disable_net) 3012 hso_dev = hso_create_net_device(interface, port_spec); 3013 else 3014 hso_dev = 3015 hso_create_bulk_serial_device(interface, port_spec); 3016 if (!hso_dev) 3017 goto exit; 3018 break; 3019 default: 3020 goto exit; 3021 } 3022 3023 /* save our data pointer in this device */ 3024 usb_set_intfdata(interface, hso_dev); 3025 3026 /* done */ 3027 return 0; 3028 exit: 3029 hso_free_interface(interface); 3030 return -ENODEV; 3031 } 3032 3033 /* device removed, cleaning up */ 3034 static void hso_disconnect(struct usb_interface *interface) 3035 { 3036 hso_free_interface(interface); 3037 3038 /* remove reference of our private data */ 3039 usb_set_intfdata(interface, NULL); 3040 } 3041 3042 static void async_get_intf(struct work_struct *data) 3043 { 3044 struct hso_device *hso_dev = 3045 container_of(data, struct hso_device, async_get_intf); 3046 usb_autopm_get_interface(hso_dev->interface); 3047 } 3048 3049 static void async_put_intf(struct work_struct *data) 3050 { 3051 struct hso_device *hso_dev = 3052 container_of(data, struct hso_device, async_put_intf); 3053 usb_autopm_put_interface(hso_dev->interface); 3054 } 3055 3056 static int hso_get_activity(struct hso_device *hso_dev) 3057 { 3058 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3059 if (!hso_dev->is_active) { 3060 hso_dev->is_active = 1; 3061 schedule_work(&hso_dev->async_get_intf); 3062 } 3063 } 3064 3065 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3066 return -EAGAIN; 3067 3068 usb_mark_last_busy(hso_dev->usb); 3069 3070 return 0; 3071 } 3072 3073 static int hso_put_activity(struct hso_device *hso_dev) 3074 { 3075 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3076 if (hso_dev->is_active) { 3077 hso_dev->is_active = 0; 3078 schedule_work(&hso_dev->async_put_intf); 3079 return -EAGAIN; 3080 } 3081 } 3082 hso_dev->is_active = 0; 3083 return 0; 3084 } 3085 3086 /* called by kernel when we need to suspend device */ 3087 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3088 { 3089 int i, result; 3090 3091 /* Stop all serial ports */ 3092 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3093 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3094 result = hso_stop_serial_device(serial_table[i]); 3095 if (result) 3096 goto out; 3097 } 3098 } 3099 3100 /* Stop all network ports */ 3101 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3102 if (network_table[i] && 3103 (network_table[i]->interface == iface)) { 3104 result = hso_stop_net_device(network_table[i]); 3105 if (result) 3106 goto out; 3107 } 3108 } 3109 3110 out: 3111 return 0; 3112 } 3113 3114 /* called by kernel when we need to resume device */ 3115 static int hso_resume(struct usb_interface *iface) 3116 { 3117 int i, result = 0; 3118 struct hso_net *hso_net; 3119 3120 /* Start all serial ports */ 3121 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3122 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3123 if (dev2ser(serial_table[i])->open_count) { 3124 result = 3125 hso_start_serial_device(serial_table[i], GFP_NOIO); 3126 hso_kick_transmit(dev2ser(serial_table[i])); 3127 if (result) 3128 goto out; 3129 } 3130 } 3131 } 3132 3133 /* Start all network ports */ 3134 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3135 if (network_table[i] && 3136 (network_table[i]->interface == iface)) { 3137 hso_net = dev2net(network_table[i]); 3138 if (hso_net->flags & IFF_UP) { 3139 /* First transmit any lingering data, 3140 then restart the device. */ 3141 if (hso_net->skb_tx_buf) { 3142 dev_dbg(&iface->dev, 3143 "Transmitting" 3144 " lingering data\n"); 3145 hso_net_start_xmit(hso_net->skb_tx_buf, 3146 hso_net->net); 3147 hso_net->skb_tx_buf = NULL; 3148 } 3149 result = hso_start_net_device(network_table[i]); 3150 if (result) 3151 goto out; 3152 } 3153 } 3154 } 3155 3156 out: 3157 return result; 3158 } 3159 3160 static void reset_device(struct work_struct *data) 3161 { 3162 struct hso_device *hso_dev = 3163 container_of(data, struct hso_device, reset_device); 3164 struct usb_device *usb = hso_dev->usb; 3165 int result; 3166 3167 if (hso_dev->usb_gone) { 3168 D1("No reset during disconnect\n"); 3169 } else { 3170 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3171 if (result < 0) 3172 D1("unable to lock device for reset: %d\n", result); 3173 else { 3174 usb_reset_device(usb); 3175 usb_unlock_device(usb); 3176 } 3177 } 3178 } 3179 3180 static void hso_serial_ref_free(struct kref *ref) 3181 { 3182 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3183 3184 hso_free_serial_device(hso_dev); 3185 } 3186 3187 static void hso_free_interface(struct usb_interface *interface) 3188 { 3189 struct hso_serial *hso_dev; 3190 struct tty_struct *tty; 3191 int i; 3192 3193 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3194 if (serial_table[i] && 3195 (serial_table[i]->interface == interface)) { 3196 hso_dev = dev2ser(serial_table[i]); 3197 spin_lock_irq(&hso_dev->serial_lock); 3198 tty = tty_kref_get(hso_dev->tty); 3199 spin_unlock_irq(&hso_dev->serial_lock); 3200 if (tty) 3201 tty_hangup(tty); 3202 mutex_lock(&hso_dev->parent->mutex); 3203 tty_kref_put(tty); 3204 hso_dev->parent->usb_gone = 1; 3205 mutex_unlock(&hso_dev->parent->mutex); 3206 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3207 } 3208 } 3209 3210 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3211 if (network_table[i] && 3212 (network_table[i]->interface == interface)) { 3213 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3214 /* hso_stop_net_device doesn't stop the net queue since 3215 * traffic needs to start it again when suspended */ 3216 netif_stop_queue(dev2net(network_table[i])->net); 3217 hso_stop_net_device(network_table[i]); 3218 cancel_work_sync(&network_table[i]->async_put_intf); 3219 cancel_work_sync(&network_table[i]->async_get_intf); 3220 if (rfk) { 3221 rfkill_unregister(rfk); 3222 rfkill_destroy(rfk); 3223 } 3224 hso_free_net_device(network_table[i]); 3225 } 3226 } 3227 } 3228 3229 /* Helper functions */ 3230 3231 /* Get the endpoint ! */ 3232 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3233 int type, int dir) 3234 { 3235 int i; 3236 struct usb_host_interface *iface = intf->cur_altsetting; 3237 struct usb_endpoint_descriptor *endp; 3238 3239 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3240 endp = &iface->endpoint[i].desc; 3241 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3242 (usb_endpoint_type(endp) == type)) 3243 return endp; 3244 } 3245 3246 return NULL; 3247 } 3248 3249 /* Get the byte that describes which ports are enabled */ 3250 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3251 { 3252 int i; 3253 struct usb_host_interface *iface = intf->cur_altsetting; 3254 3255 if (iface->extralen == 3) { 3256 *ports = iface->extra[2]; 3257 return 0; 3258 } 3259 3260 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3261 if (iface->endpoint[i].extralen == 3) { 3262 *ports = iface->endpoint[i].extra[2]; 3263 return 0; 3264 } 3265 } 3266 3267 return -1; 3268 } 3269 3270 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3271 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3272 struct usb_device *usb, gfp_t gfp) 3273 { 3274 int result; 3275 3276 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3277 usb_rcvintpipe(usb, 3278 shared_int->intr_endp->bEndpointAddress & 0x7F), 3279 shared_int->shared_intr_buf, 3280 1, 3281 intr_callback, shared_int, 3282 shared_int->intr_endp->bInterval); 3283 3284 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3285 if (result) 3286 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3287 result); 3288 3289 return result; 3290 } 3291 3292 /* operations setup of the serial interface */ 3293 static const struct tty_operations hso_serial_ops = { 3294 .open = hso_serial_open, 3295 .close = hso_serial_close, 3296 .write = hso_serial_write, 3297 .write_room = hso_serial_write_room, 3298 .ioctl = hso_serial_ioctl, 3299 .set_termios = hso_serial_set_termios, 3300 .chars_in_buffer = hso_serial_chars_in_buffer, 3301 .tiocmget = hso_serial_tiocmget, 3302 .tiocmset = hso_serial_tiocmset, 3303 .unthrottle = hso_unthrottle 3304 }; 3305 3306 static struct usb_driver hso_driver = { 3307 .name = driver_name, 3308 .probe = hso_probe, 3309 .disconnect = hso_disconnect, 3310 .id_table = hso_ids, 3311 .suspend = hso_suspend, 3312 .resume = hso_resume, 3313 .reset_resume = hso_resume, 3314 .supports_autosuspend = 1, 3315 }; 3316 3317 static int __init hso_init(void) 3318 { 3319 int i; 3320 int result; 3321 3322 /* put it in the log */ 3323 printk(KERN_INFO "hso: %s\n", version); 3324 3325 /* Initialise the serial table semaphore and table */ 3326 spin_lock_init(&serial_table_lock); 3327 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3328 serial_table[i] = NULL; 3329 3330 /* allocate our driver using the proper amount of supported minors */ 3331 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3332 if (!tty_drv) 3333 return -ENOMEM; 3334 3335 /* fill in all needed values */ 3336 tty_drv->magic = TTY_DRIVER_MAGIC; 3337 tty_drv->owner = THIS_MODULE; 3338 tty_drv->driver_name = driver_name; 3339 tty_drv->name = tty_filename; 3340 3341 /* if major number is provided as parameter, use that one */ 3342 if (tty_major) 3343 tty_drv->major = tty_major; 3344 3345 tty_drv->minor_start = 0; 3346 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3347 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3348 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3349 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3350 tty_drv->init_termios = tty_std_termios; 3351 hso_init_termios(&tty_drv->init_termios); 3352 tty_set_operations(tty_drv, &hso_serial_ops); 3353 3354 /* register the tty driver */ 3355 result = tty_register_driver(tty_drv); 3356 if (result) { 3357 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3358 __func__, result); 3359 return result; 3360 } 3361 3362 /* register this module as an usb driver */ 3363 result = usb_register(&hso_driver); 3364 if (result) { 3365 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3366 result); 3367 /* cleanup serial interface */ 3368 tty_unregister_driver(tty_drv); 3369 return result; 3370 } 3371 3372 /* done */ 3373 return 0; 3374 } 3375 3376 static void __exit hso_exit(void) 3377 { 3378 printk(KERN_INFO "hso: unloaded\n"); 3379 3380 tty_unregister_driver(tty_drv); 3381 /* deregister the usb driver */ 3382 usb_deregister(&hso_driver); 3383 } 3384 3385 /* Module definitions */ 3386 module_init(hso_init); 3387 module_exit(hso_exit); 3388 3389 MODULE_AUTHOR(MOD_AUTHOR); 3390 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3391 MODULE_LICENSE(MOD_LICENSE); 3392 MODULE_INFO(Version, DRIVER_VERSION); 3393 3394 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3395 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3396 module_param(debug, int, S_IRUGO | S_IWUSR); 3397 3398 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3399 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3400 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3401 3402 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3403 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3404 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3405