1 /****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31 /****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53 #include <linux/sched.h> 54 #include <linux/slab.h> 55 #include <linux/init.h> 56 #include <linux/delay.h> 57 #include <linux/netdevice.h> 58 #include <linux/module.h> 59 #include <linux/ethtool.h> 60 #include <linux/usb.h> 61 #include <linux/timer.h> 62 #include <linux/tty.h> 63 #include <linux/tty_driver.h> 64 #include <linux/tty_flip.h> 65 #include <linux/kmod.h> 66 #include <linux/rfkill.h> 67 #include <linux/ip.h> 68 #include <linux/uaccess.h> 69 #include <linux/usb/cdc.h> 70 #include <net/arp.h> 71 #include <asm/byteorder.h> 72 #include <linux/serial_core.h> 73 #include <linux/serial.h> 74 75 76 #define MOD_AUTHOR "Option Wireless" 77 #define MOD_DESCRIPTION "USB High Speed Option driver" 78 #define MOD_LICENSE "GPL" 79 80 #define HSO_MAX_NET_DEVICES 10 81 #define HSO__MAX_MTU 2048 82 #define DEFAULT_MTU 1500 83 #define DEFAULT_MRU 1500 84 85 #define CTRL_URB_RX_SIZE 1024 86 #define CTRL_URB_TX_SIZE 64 87 88 #define BULK_URB_RX_SIZE 4096 89 #define BULK_URB_TX_SIZE 8192 90 91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_RX_BUF_COUNT 4 94 #define USB_TYPE_OPTION_VENDOR 0x20 95 96 /* These definitions are used with the struct hso_net flags element */ 97 /* - use *_bit operations on it. (bit indices not values.) */ 98 #define HSO_NET_RUNNING 0 99 100 #define HSO_NET_TX_TIMEOUT (HZ*10) 101 102 #define HSO_SERIAL_MAGIC 0x48534f31 103 104 /* Number of ttys to handle */ 105 #define HSO_SERIAL_TTY_MINORS 256 106 107 #define MAX_RX_URBS 2 108 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 110 { 111 if (tty) 112 return tty->driver_data; 113 return NULL; 114 } 115 116 /*****************************************************************************/ 117 /* Debugging functions */ 118 /*****************************************************************************/ 119 #define D__(lvl_, fmt, arg...) \ 120 do { \ 121 printk(lvl_ "[%d:%s]: " fmt "\n", \ 122 __LINE__, __func__, ## arg); \ 123 } while (0) 124 125 #define D_(lvl, args...) \ 126 do { \ 127 if (lvl & debug) \ 128 D__(KERN_INFO, args); \ 129 } while (0) 130 131 #define D1(args...) D_(0x01, ##args) 132 #define D2(args...) D_(0x02, ##args) 133 #define D3(args...) D_(0x04, ##args) 134 #define D4(args...) D_(0x08, ##args) 135 #define D5(args...) D_(0x10, ##args) 136 137 /*****************************************************************************/ 138 /* Enumerators */ 139 /*****************************************************************************/ 140 enum pkt_parse_state { 141 WAIT_IP, 142 WAIT_DATA, 143 WAIT_SYNC 144 }; 145 146 /*****************************************************************************/ 147 /* Structs */ 148 /*****************************************************************************/ 149 150 struct hso_shared_int { 151 struct usb_endpoint_descriptor *intr_endp; 152 void *shared_intr_buf; 153 struct urb *shared_intr_urb; 154 struct usb_device *usb; 155 int use_count; 156 int ref_count; 157 struct mutex shared_int_lock; 158 }; 159 160 struct hso_net { 161 struct hso_device *parent; 162 struct net_device *net; 163 struct rfkill *rfkill; 164 165 struct usb_endpoint_descriptor *in_endp; 166 struct usb_endpoint_descriptor *out_endp; 167 168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 169 struct urb *mux_bulk_tx_urb; 170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 171 void *mux_bulk_tx_buf; 172 173 struct sk_buff *skb_rx_buf; 174 struct sk_buff *skb_tx_buf; 175 176 enum pkt_parse_state rx_parse_state; 177 spinlock_t net_lock; 178 179 unsigned short rx_buf_size; 180 unsigned short rx_buf_missing; 181 struct iphdr rx_ip_hdr; 182 183 unsigned long flags; 184 }; 185 186 enum rx_ctrl_state{ 187 RX_IDLE, 188 RX_SENT, 189 RX_PENDING 190 }; 191 192 #define BM_REQUEST_TYPE (0xa1) 193 #define B_NOTIFICATION (0x20) 194 #define W_VALUE (0x0) 195 #define W_INDEX (0x2) 196 #define W_LENGTH (0x2) 197 198 #define B_OVERRUN (0x1<<6) 199 #define B_PARITY (0x1<<5) 200 #define B_FRAMING (0x1<<4) 201 #define B_RING_SIGNAL (0x1<<3) 202 #define B_BREAK (0x1<<2) 203 #define B_TX_CARRIER (0x1<<1) 204 #define B_RX_CARRIER (0x1<<0) 205 206 struct hso_serial_state_notification { 207 u8 bmRequestType; 208 u8 bNotification; 209 u16 wValue; 210 u16 wIndex; 211 u16 wLength; 212 u16 UART_state_bitmap; 213 } __packed; 214 215 struct hso_tiocmget { 216 struct mutex mutex; 217 wait_queue_head_t waitq; 218 int intr_completed; 219 struct usb_endpoint_descriptor *endp; 220 struct urb *urb; 221 struct hso_serial_state_notification serial_state_notification; 222 u16 prev_UART_state_bitmap; 223 struct uart_icount icount; 224 }; 225 226 227 struct hso_serial { 228 struct hso_device *parent; 229 int magic; 230 u8 minor; 231 232 struct hso_shared_int *shared_int; 233 234 /* rx/tx urb could be either a bulk urb or a control urb depending 235 on which serial port it is used on. */ 236 struct urb *rx_urb[MAX_RX_URBS]; 237 u8 num_rx_urbs; 238 u8 *rx_data[MAX_RX_URBS]; 239 u16 rx_data_length; /* should contain allocated length */ 240 241 struct urb *tx_urb; 242 u8 *tx_data; 243 u8 *tx_buffer; 244 u16 tx_data_length; /* should contain allocated length */ 245 u16 tx_data_count; 246 u16 tx_buffer_count; 247 struct usb_ctrlrequest ctrl_req_tx; 248 struct usb_ctrlrequest ctrl_req_rx; 249 250 struct usb_endpoint_descriptor *in_endp; 251 struct usb_endpoint_descriptor *out_endp; 252 253 enum rx_ctrl_state rx_state; 254 u8 rts_state; 255 u8 dtr_state; 256 unsigned tx_urb_used:1; 257 258 /* from usb_serial_port */ 259 struct tty_struct *tty; 260 int open_count; 261 spinlock_t serial_lock; 262 263 int (*write_data) (struct hso_serial *serial); 264 struct hso_tiocmget *tiocmget; 265 /* Hacks required to get flow control 266 * working on the serial receive buffers 267 * so as not to drop characters on the floor. 268 */ 269 int curr_rx_urb_idx; 270 u16 curr_rx_urb_offset; 271 u8 rx_urb_filled[MAX_RX_URBS]; 272 struct tasklet_struct unthrottle_tasklet; 273 struct work_struct retry_unthrottle_workqueue; 274 }; 275 276 struct hso_device { 277 union { 278 struct hso_serial *dev_serial; 279 struct hso_net *dev_net; 280 } port_data; 281 282 u32 port_spec; 283 284 u8 is_active; 285 u8 usb_gone; 286 struct work_struct async_get_intf; 287 struct work_struct async_put_intf; 288 struct work_struct reset_device; 289 290 struct usb_device *usb; 291 struct usb_interface *interface; 292 293 struct device *dev; 294 struct kref ref; 295 struct mutex mutex; 296 }; 297 298 /* Type of interface */ 299 #define HSO_INTF_MASK 0xFF00 300 #define HSO_INTF_MUX 0x0100 301 #define HSO_INTF_BULK 0x0200 302 303 /* Type of port */ 304 #define HSO_PORT_MASK 0xFF 305 #define HSO_PORT_NO_PORT 0x0 306 #define HSO_PORT_CONTROL 0x1 307 #define HSO_PORT_APP 0x2 308 #define HSO_PORT_GPS 0x3 309 #define HSO_PORT_PCSC 0x4 310 #define HSO_PORT_APP2 0x5 311 #define HSO_PORT_GPS_CONTROL 0x6 312 #define HSO_PORT_MSD 0x7 313 #define HSO_PORT_VOICE 0x8 314 #define HSO_PORT_DIAG2 0x9 315 #define HSO_PORT_DIAG 0x10 316 #define HSO_PORT_MODEM 0x11 317 #define HSO_PORT_NETWORK 0x12 318 319 /* Additional device info */ 320 #define HSO_INFO_MASK 0xFF000000 321 #define HSO_INFO_CRC_BUG 0x01000000 322 323 /*****************************************************************************/ 324 /* Prototypes */ 325 /*****************************************************************************/ 326 /* Serial driver functions */ 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 328 unsigned int set, unsigned int clear); 329 static void ctrl_callback(struct urb *urb); 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 331 static void hso_kick_transmit(struct hso_serial *serial); 332 /* Helper functions */ 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 334 struct usb_device *usb, gfp_t gfp); 335 static void handle_usb_error(int status, const char *function, 336 struct hso_device *hso_dev); 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 338 int type, int dir); 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 340 static void hso_free_interface(struct usb_interface *intf); 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 342 static int hso_stop_serial_device(struct hso_device *hso_dev); 343 static int hso_start_net_device(struct hso_device *hso_dev); 344 static void hso_free_shared_int(struct hso_shared_int *shared_int); 345 static int hso_stop_net_device(struct hso_device *hso_dev); 346 static void hso_serial_ref_free(struct kref *ref); 347 static void hso_std_serial_read_bulk_callback(struct urb *urb); 348 static int hso_mux_serial_read(struct hso_serial *serial); 349 static void async_get_intf(struct work_struct *data); 350 static void async_put_intf(struct work_struct *data); 351 static int hso_put_activity(struct hso_device *hso_dev); 352 static int hso_get_activity(struct hso_device *hso_dev); 353 static void tiocmget_intr_callback(struct urb *urb); 354 static void reset_device(struct work_struct *data); 355 /*****************************************************************************/ 356 /* Helping functions */ 357 /*****************************************************************************/ 358 359 /* #define DEBUG */ 360 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 362 { 363 return hso_dev->port_data.dev_net; 364 } 365 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 367 { 368 return hso_dev->port_data.dev_serial; 369 } 370 371 /* Debugging functions */ 372 #ifdef DEBUG 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 374 unsigned int len) 375 { 376 static char name[255]; 377 378 sprintf(name, "hso[%d:%s]", line_count, func_name); 379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 380 } 381 382 #define DUMP(buf_, len_) \ 383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 384 385 #define DUMP1(buf_, len_) \ 386 do { \ 387 if (0x01 & debug) \ 388 DUMP(buf_, len_); \ 389 } while (0) 390 #else 391 #define DUMP(buf_, len_) 392 #define DUMP1(buf_, len_) 393 #endif 394 395 /* module parameters */ 396 static int debug; 397 static int tty_major; 398 static int disable_net; 399 400 /* driver info */ 401 static const char driver_name[] = "hso"; 402 static const char tty_filename[] = "ttyHS"; 403 static const char *version = __FILE__ ": " MOD_AUTHOR; 404 /* the usb driver itself (registered in hso_init) */ 405 static struct usb_driver hso_driver; 406 /* serial structures */ 407 static struct tty_driver *tty_drv; 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 410 static spinlock_t serial_table_lock; 411 412 static const s32 default_port_spec[] = { 413 HSO_INTF_MUX | HSO_PORT_NETWORK, 414 HSO_INTF_BULK | HSO_PORT_DIAG, 415 HSO_INTF_BULK | HSO_PORT_MODEM, 416 0 417 }; 418 419 static const s32 icon321_port_spec[] = { 420 HSO_INTF_MUX | HSO_PORT_NETWORK, 421 HSO_INTF_BULK | HSO_PORT_DIAG2, 422 HSO_INTF_BULK | HSO_PORT_MODEM, 423 HSO_INTF_BULK | HSO_PORT_DIAG, 424 0 425 }; 426 427 #define default_port_device(vendor, product) \ 428 USB_DEVICE(vendor, product), \ 429 .driver_info = (kernel_ulong_t)default_port_spec 430 431 #define icon321_port_device(vendor, product) \ 432 USB_DEVICE(vendor, product), \ 433 .driver_info = (kernel_ulong_t)icon321_port_spec 434 435 /* list of devices we support */ 436 static const struct usb_device_id hso_ids[] = { 437 {default_port_device(0x0af0, 0x6711)}, 438 {default_port_device(0x0af0, 0x6731)}, 439 {default_port_device(0x0af0, 0x6751)}, 440 {default_port_device(0x0af0, 0x6771)}, 441 {default_port_device(0x0af0, 0x6791)}, 442 {default_port_device(0x0af0, 0x6811)}, 443 {default_port_device(0x0af0, 0x6911)}, 444 {default_port_device(0x0af0, 0x6951)}, 445 {default_port_device(0x0af0, 0x6971)}, 446 {default_port_device(0x0af0, 0x7011)}, 447 {default_port_device(0x0af0, 0x7031)}, 448 {default_port_device(0x0af0, 0x7051)}, 449 {default_port_device(0x0af0, 0x7071)}, 450 {default_port_device(0x0af0, 0x7111)}, 451 {default_port_device(0x0af0, 0x7211)}, 452 {default_port_device(0x0af0, 0x7251)}, 453 {default_port_device(0x0af0, 0x7271)}, 454 {default_port_device(0x0af0, 0x7311)}, 455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 465 {USB_DEVICE(0x0af0, 0x7701)}, 466 {USB_DEVICE(0x0af0, 0x7706)}, 467 {USB_DEVICE(0x0af0, 0x7801)}, 468 {USB_DEVICE(0x0af0, 0x7901)}, 469 {USB_DEVICE(0x0af0, 0x7A01)}, 470 {USB_DEVICE(0x0af0, 0x7A05)}, 471 {USB_DEVICE(0x0af0, 0x8200)}, 472 {USB_DEVICE(0x0af0, 0x8201)}, 473 {USB_DEVICE(0x0af0, 0x8300)}, 474 {USB_DEVICE(0x0af0, 0x8302)}, 475 {USB_DEVICE(0x0af0, 0x8304)}, 476 {USB_DEVICE(0x0af0, 0x8400)}, 477 {USB_DEVICE(0x0af0, 0x8600)}, 478 {USB_DEVICE(0x0af0, 0x8800)}, 479 {USB_DEVICE(0x0af0, 0x8900)}, 480 {USB_DEVICE(0x0af0, 0x9000)}, 481 {USB_DEVICE(0x0af0, 0xd035)}, 482 {USB_DEVICE(0x0af0, 0xd055)}, 483 {USB_DEVICE(0x0af0, 0xd155)}, 484 {USB_DEVICE(0x0af0, 0xd255)}, 485 {USB_DEVICE(0x0af0, 0xd057)}, 486 {USB_DEVICE(0x0af0, 0xd157)}, 487 {USB_DEVICE(0x0af0, 0xd257)}, 488 {USB_DEVICE(0x0af0, 0xd357)}, 489 {USB_DEVICE(0x0af0, 0xd058)}, 490 {USB_DEVICE(0x0af0, 0xc100)}, 491 {} 492 }; 493 MODULE_DEVICE_TABLE(usb, hso_ids); 494 495 /* Sysfs attribute */ 496 static ssize_t hso_sysfs_show_porttype(struct device *dev, 497 struct device_attribute *attr, 498 char *buf) 499 { 500 struct hso_device *hso_dev = dev_get_drvdata(dev); 501 char *port_name; 502 503 if (!hso_dev) 504 return 0; 505 506 switch (hso_dev->port_spec & HSO_PORT_MASK) { 507 case HSO_PORT_CONTROL: 508 port_name = "Control"; 509 break; 510 case HSO_PORT_APP: 511 port_name = "Application"; 512 break; 513 case HSO_PORT_APP2: 514 port_name = "Application2"; 515 break; 516 case HSO_PORT_GPS: 517 port_name = "GPS"; 518 break; 519 case HSO_PORT_GPS_CONTROL: 520 port_name = "GPS Control"; 521 break; 522 case HSO_PORT_PCSC: 523 port_name = "PCSC"; 524 break; 525 case HSO_PORT_DIAG: 526 port_name = "Diagnostic"; 527 break; 528 case HSO_PORT_DIAG2: 529 port_name = "Diagnostic2"; 530 break; 531 case HSO_PORT_MODEM: 532 port_name = "Modem"; 533 break; 534 case HSO_PORT_NETWORK: 535 port_name = "Network"; 536 break; 537 default: 538 port_name = "Unknown"; 539 break; 540 } 541 542 return sprintf(buf, "%s\n", port_name); 543 } 544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 545 546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 547 { 548 int idx; 549 550 for (idx = 0; idx < serial->num_rx_urbs; idx++) 551 if (serial->rx_urb[idx] == urb) 552 return idx; 553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 554 return -1; 555 } 556 557 /* converts mux value to a port spec value */ 558 static u32 hso_mux_to_port(int mux) 559 { 560 u32 result; 561 562 switch (mux) { 563 case 0x1: 564 result = HSO_PORT_CONTROL; 565 break; 566 case 0x2: 567 result = HSO_PORT_APP; 568 break; 569 case 0x4: 570 result = HSO_PORT_PCSC; 571 break; 572 case 0x8: 573 result = HSO_PORT_GPS; 574 break; 575 case 0x10: 576 result = HSO_PORT_APP2; 577 break; 578 default: 579 result = HSO_PORT_NO_PORT; 580 } 581 return result; 582 } 583 584 /* converts port spec value to a mux value */ 585 static u32 hso_port_to_mux(int port) 586 { 587 u32 result; 588 589 switch (port & HSO_PORT_MASK) { 590 case HSO_PORT_CONTROL: 591 result = 0x0; 592 break; 593 case HSO_PORT_APP: 594 result = 0x1; 595 break; 596 case HSO_PORT_PCSC: 597 result = 0x2; 598 break; 599 case HSO_PORT_GPS: 600 result = 0x3; 601 break; 602 case HSO_PORT_APP2: 603 result = 0x4; 604 break; 605 default: 606 result = 0x0; 607 } 608 return result; 609 } 610 611 static struct hso_serial *get_serial_by_shared_int_and_type( 612 struct hso_shared_int *shared_int, 613 int mux) 614 { 615 int i, port; 616 617 port = hso_mux_to_port(mux); 618 619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 620 if (serial_table[i] && 621 (dev2ser(serial_table[i])->shared_int == shared_int) && 622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 623 return dev2ser(serial_table[i]); 624 } 625 } 626 627 return NULL; 628 } 629 630 static struct hso_serial *get_serial_by_index(unsigned index) 631 { 632 struct hso_serial *serial = NULL; 633 unsigned long flags; 634 635 spin_lock_irqsave(&serial_table_lock, flags); 636 if (serial_table[index]) 637 serial = dev2ser(serial_table[index]); 638 spin_unlock_irqrestore(&serial_table_lock, flags); 639 640 return serial; 641 } 642 643 static int get_free_serial_index(void) 644 { 645 int index; 646 unsigned long flags; 647 648 spin_lock_irqsave(&serial_table_lock, flags); 649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 650 if (serial_table[index] == NULL) { 651 spin_unlock_irqrestore(&serial_table_lock, flags); 652 return index; 653 } 654 } 655 spin_unlock_irqrestore(&serial_table_lock, flags); 656 657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 658 return -1; 659 } 660 661 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 662 { 663 unsigned long flags; 664 665 spin_lock_irqsave(&serial_table_lock, flags); 666 if (serial) 667 serial_table[index] = serial->parent; 668 else 669 serial_table[index] = NULL; 670 spin_unlock_irqrestore(&serial_table_lock, flags); 671 } 672 673 static void handle_usb_error(int status, const char *function, 674 struct hso_device *hso_dev) 675 { 676 char *explanation; 677 678 switch (status) { 679 case -ENODEV: 680 explanation = "no device"; 681 break; 682 case -ENOENT: 683 explanation = "endpoint not enabled"; 684 break; 685 case -EPIPE: 686 explanation = "endpoint stalled"; 687 break; 688 case -ENOSPC: 689 explanation = "not enough bandwidth"; 690 break; 691 case -ESHUTDOWN: 692 explanation = "device disabled"; 693 break; 694 case -EHOSTUNREACH: 695 explanation = "device suspended"; 696 break; 697 case -EINVAL: 698 case -EAGAIN: 699 case -EFBIG: 700 case -EMSGSIZE: 701 explanation = "internal error"; 702 break; 703 case -EILSEQ: 704 case -EPROTO: 705 case -ETIME: 706 case -ETIMEDOUT: 707 explanation = "protocol error"; 708 if (hso_dev) 709 schedule_work(&hso_dev->reset_device); 710 break; 711 default: 712 explanation = "unknown status"; 713 break; 714 } 715 716 /* log a meaningful explanation of an USB status */ 717 D1("%s: received USB status - %s (%d)", function, explanation, status); 718 } 719 720 /* Network interface functions */ 721 722 /* called when net interface is brought up by ifconfig */ 723 static int hso_net_open(struct net_device *net) 724 { 725 struct hso_net *odev = netdev_priv(net); 726 unsigned long flags = 0; 727 728 if (!odev) { 729 dev_err(&net->dev, "No net device !\n"); 730 return -ENODEV; 731 } 732 733 odev->skb_tx_buf = NULL; 734 735 /* setup environment */ 736 spin_lock_irqsave(&odev->net_lock, flags); 737 odev->rx_parse_state = WAIT_IP; 738 odev->rx_buf_size = 0; 739 odev->rx_buf_missing = sizeof(struct iphdr); 740 spin_unlock_irqrestore(&odev->net_lock, flags); 741 742 /* We are up and running. */ 743 set_bit(HSO_NET_RUNNING, &odev->flags); 744 hso_start_net_device(odev->parent); 745 746 /* Tell the kernel we are ready to start receiving from it */ 747 netif_start_queue(net); 748 749 return 0; 750 } 751 752 /* called when interface is brought down by ifconfig */ 753 static int hso_net_close(struct net_device *net) 754 { 755 struct hso_net *odev = netdev_priv(net); 756 757 /* we don't need the queue anymore */ 758 netif_stop_queue(net); 759 /* no longer running */ 760 clear_bit(HSO_NET_RUNNING, &odev->flags); 761 762 hso_stop_net_device(odev->parent); 763 764 /* done */ 765 return 0; 766 } 767 768 /* USB tells is xmit done, we should start the netqueue again */ 769 static void write_bulk_callback(struct urb *urb) 770 { 771 struct hso_net *odev = urb->context; 772 int status = urb->status; 773 774 /* Sanity check */ 775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 777 return; 778 } 779 780 /* Do we still have a valid kernel network device? */ 781 if (!netif_device_present(odev->net)) { 782 dev_err(&urb->dev->dev, "%s: net device not present\n", 783 __func__); 784 return; 785 } 786 787 /* log status, but don't act on it, we don't need to resubmit anything 788 * anyhow */ 789 if (status) 790 handle_usb_error(status, __func__, odev->parent); 791 792 hso_put_activity(odev->parent); 793 794 /* Tell the network interface we are ready for another frame */ 795 netif_wake_queue(odev->net); 796 } 797 798 /* called by kernel when we need to transmit a packet */ 799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 800 struct net_device *net) 801 { 802 struct hso_net *odev = netdev_priv(net); 803 int result; 804 805 /* Tell the kernel, "No more frames 'til we are done with this one." */ 806 netif_stop_queue(net); 807 if (hso_get_activity(odev->parent) == -EAGAIN) { 808 odev->skb_tx_buf = skb; 809 return NETDEV_TX_OK; 810 } 811 812 /* log if asked */ 813 DUMP1(skb->data, skb->len); 814 /* Copy it from kernel memory to OUR memory */ 815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 817 818 /* Fill in the URB for shipping it out. */ 819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 820 odev->parent->usb, 821 usb_sndbulkpipe(odev->parent->usb, 822 odev->out_endp-> 823 bEndpointAddress & 0x7F), 824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 825 odev); 826 827 /* Deal with the Zero Length packet problem, I hope */ 828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 829 830 /* Send the URB on its merry way. */ 831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 832 if (result) { 833 dev_warn(&odev->parent->interface->dev, 834 "failed mux_bulk_tx_urb %d\n", result); 835 net->stats.tx_errors++; 836 netif_start_queue(net); 837 } else { 838 net->stats.tx_packets++; 839 net->stats.tx_bytes += skb->len; 840 } 841 dev_kfree_skb(skb); 842 /* we're done */ 843 return NETDEV_TX_OK; 844 } 845 846 static 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 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 852 } 853 854 static const struct ethtool_ops ops = { 855 .get_drvinfo = hso_get_drvinfo, 856 .get_link = ethtool_op_get_link 857 }; 858 859 /* called when a packet did not ack after watchdogtimeout */ 860 static void hso_net_tx_timeout(struct net_device *net) 861 { 862 struct hso_net *odev = netdev_priv(net); 863 864 if (!odev) 865 return; 866 867 /* Tell syslog we are hosed. */ 868 dev_warn(&net->dev, "Tx timed out.\n"); 869 870 /* Tear the waiting frame off the list */ 871 if (odev->mux_bulk_tx_urb && 872 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 873 usb_unlink_urb(odev->mux_bulk_tx_urb); 874 875 /* Update statistics */ 876 net->stats.tx_errors++; 877 } 878 879 /* make a real packet from the received USB buffer */ 880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 881 unsigned int count, unsigned char is_eop) 882 { 883 unsigned short temp_bytes; 884 unsigned short buffer_offset = 0; 885 unsigned short frame_len; 886 unsigned char *tmp_rx_buf; 887 888 /* log if needed */ 889 D1("Rx %d bytes", count); 890 DUMP(ip_pkt, min(128, (int)count)); 891 892 while (count) { 893 switch (odev->rx_parse_state) { 894 case WAIT_IP: 895 /* waiting for IP header. */ 896 /* wanted bytes - size of ip header */ 897 temp_bytes = 898 (count < 899 odev->rx_buf_missing) ? count : odev-> 900 rx_buf_missing; 901 902 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 903 odev->rx_buf_size, ip_pkt + buffer_offset, 904 temp_bytes); 905 906 odev->rx_buf_size += temp_bytes; 907 buffer_offset += temp_bytes; 908 odev->rx_buf_missing -= temp_bytes; 909 count -= temp_bytes; 910 911 if (!odev->rx_buf_missing) { 912 /* header is complete allocate an sk_buffer and 913 * continue to WAIT_DATA */ 914 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 915 916 if ((frame_len > DEFAULT_MRU) || 917 (frame_len < sizeof(struct iphdr))) { 918 dev_err(&odev->net->dev, 919 "Invalid frame (%d) length\n", 920 frame_len); 921 odev->rx_parse_state = WAIT_SYNC; 922 continue; 923 } 924 /* Allocate an sk_buff */ 925 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 926 frame_len); 927 if (!odev->skb_rx_buf) { 928 /* We got no receive buffer. */ 929 D1("could not allocate memory"); 930 odev->rx_parse_state = WAIT_SYNC; 931 return; 932 } 933 934 /* Copy what we got so far. make room for iphdr 935 * after tail. */ 936 tmp_rx_buf = 937 skb_put(odev->skb_rx_buf, 938 sizeof(struct iphdr)); 939 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 940 sizeof(struct iphdr)); 941 942 /* ETH_HLEN */ 943 odev->rx_buf_size = sizeof(struct iphdr); 944 945 /* Filip actually use .tot_len */ 946 odev->rx_buf_missing = 947 frame_len - sizeof(struct iphdr); 948 odev->rx_parse_state = WAIT_DATA; 949 } 950 break; 951 952 case WAIT_DATA: 953 temp_bytes = (count < odev->rx_buf_missing) 954 ? count : odev->rx_buf_missing; 955 956 /* Copy the rest of the bytes that are left in the 957 * buffer into the waiting sk_buf. */ 958 /* Make room for temp_bytes after tail. */ 959 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 960 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 961 962 odev->rx_buf_missing -= temp_bytes; 963 count -= temp_bytes; 964 buffer_offset += temp_bytes; 965 odev->rx_buf_size += temp_bytes; 966 if (!odev->rx_buf_missing) { 967 /* Packet is complete. Inject into stack. */ 968 /* We have IP packet here */ 969 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 970 /* don't check it */ 971 odev->skb_rx_buf->ip_summed = 972 CHECKSUM_UNNECESSARY; 973 974 skb_reset_mac_header(odev->skb_rx_buf); 975 976 /* Ship it off to the kernel */ 977 netif_rx(odev->skb_rx_buf); 978 /* No longer our buffer. */ 979 odev->skb_rx_buf = NULL; 980 981 /* update out statistics */ 982 odev->net->stats.rx_packets++; 983 984 odev->net->stats.rx_bytes += odev->rx_buf_size; 985 986 odev->rx_buf_size = 0; 987 odev->rx_buf_missing = sizeof(struct iphdr); 988 odev->rx_parse_state = WAIT_IP; 989 } 990 break; 991 992 case WAIT_SYNC: 993 D1(" W_S"); 994 count = 0; 995 break; 996 default: 997 D1(" "); 998 count--; 999 break; 1000 } 1001 } 1002 1003 /* Recovery mechanism for WAIT_SYNC state. */ 1004 if (is_eop) { 1005 if (odev->rx_parse_state == WAIT_SYNC) { 1006 odev->rx_parse_state = WAIT_IP; 1007 odev->rx_buf_size = 0; 1008 odev->rx_buf_missing = sizeof(struct iphdr); 1009 } 1010 } 1011 } 1012 1013 /* Moving data from usb to kernel (in interrupt state) */ 1014 static void read_bulk_callback(struct urb *urb) 1015 { 1016 struct hso_net *odev = urb->context; 1017 struct net_device *net; 1018 int result; 1019 int status = urb->status; 1020 1021 /* is al ok? (Filip: Who's Al ?) */ 1022 if (status) { 1023 handle_usb_error(status, __func__, odev->parent); 1024 return; 1025 } 1026 1027 /* Sanity check */ 1028 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1029 D1("BULK IN callback but driver is not active!"); 1030 return; 1031 } 1032 usb_mark_last_busy(urb->dev); 1033 1034 net = odev->net; 1035 1036 if (!netif_device_present(net)) { 1037 /* Somebody killed our network interface... */ 1038 return; 1039 } 1040 1041 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1042 u32 rest; 1043 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1044 rest = urb->actual_length % 1045 le16_to_cpu(odev->in_endp->wMaxPacketSize); 1046 if (((rest == 5) || (rest == 6)) && 1047 !memcmp(((u8 *) urb->transfer_buffer) + 1048 urb->actual_length - 4, crc_check, 4)) { 1049 urb->actual_length -= 4; 1050 } 1051 } 1052 1053 /* do we even have a packet? */ 1054 if (urb->actual_length) { 1055 /* Handle the IP stream, add header and push it onto network 1056 * stack if the packet is complete. */ 1057 spin_lock(&odev->net_lock); 1058 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1059 (urb->transfer_buffer_length > 1060 urb->actual_length) ? 1 : 0); 1061 spin_unlock(&odev->net_lock); 1062 } 1063 1064 /* We are done with this URB, resubmit it. Prep the USB to wait for 1065 * another frame. Reuse same as received. */ 1066 usb_fill_bulk_urb(urb, 1067 odev->parent->usb, 1068 usb_rcvbulkpipe(odev->parent->usb, 1069 odev->in_endp-> 1070 bEndpointAddress & 0x7F), 1071 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1072 read_bulk_callback, odev); 1073 1074 /* Give this to the USB subsystem so it can tell us when more data 1075 * arrives. */ 1076 result = usb_submit_urb(urb, GFP_ATOMIC); 1077 if (result) 1078 dev_warn(&odev->parent->interface->dev, 1079 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1080 result); 1081 } 1082 1083 /* Serial driver functions */ 1084 1085 static void hso_init_termios(struct ktermios *termios) 1086 { 1087 /* 1088 * The default requirements for this device are: 1089 */ 1090 termios->c_iflag &= 1091 ~(IGNBRK /* disable ignore break */ 1092 | BRKINT /* disable break causes interrupt */ 1093 | PARMRK /* disable mark parity errors */ 1094 | ISTRIP /* disable clear high bit of input characters */ 1095 | INLCR /* disable translate NL to CR */ 1096 | IGNCR /* disable ignore CR */ 1097 | ICRNL /* disable translate CR to NL */ 1098 | IXON); /* disable enable XON/XOFF flow control */ 1099 1100 /* disable postprocess output characters */ 1101 termios->c_oflag &= ~OPOST; 1102 1103 termios->c_lflag &= 1104 ~(ECHO /* disable echo input characters */ 1105 | ECHONL /* disable echo new line */ 1106 | ICANON /* disable erase, kill, werase, and rprnt 1107 special characters */ 1108 | ISIG /* disable interrupt, quit, and suspend special 1109 characters */ 1110 | IEXTEN); /* disable non-POSIX special characters */ 1111 1112 termios->c_cflag &= 1113 ~(CSIZE /* no size */ 1114 | PARENB /* disable parity bit */ 1115 | CBAUD /* clear current baud rate */ 1116 | CBAUDEX); /* clear current buad rate */ 1117 1118 termios->c_cflag |= CS8; /* character size 8 bits */ 1119 1120 /* baud rate 115200 */ 1121 tty_termios_encode_baud_rate(termios, 115200, 115200); 1122 } 1123 1124 static void _hso_serial_set_termios(struct tty_struct *tty, 1125 struct ktermios *old) 1126 { 1127 struct hso_serial *serial = get_serial_by_tty(tty); 1128 struct ktermios *termios; 1129 1130 if (!serial) { 1131 printk(KERN_ERR "%s: no tty structures", __func__); 1132 return; 1133 } 1134 1135 D4("port %d", serial->minor); 1136 1137 /* 1138 * Fix up unsupported bits 1139 */ 1140 termios = tty->termios; 1141 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1142 1143 termios->c_cflag &= 1144 ~(CSIZE /* no size */ 1145 | PARENB /* disable parity bit */ 1146 | CBAUD /* clear current baud rate */ 1147 | CBAUDEX); /* clear current buad rate */ 1148 1149 termios->c_cflag |= CS8; /* character size 8 bits */ 1150 1151 /* baud rate 115200 */ 1152 tty_encode_baud_rate(tty, 115200, 115200); 1153 } 1154 1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1156 { 1157 int result; 1158 /* We are done with this URB, resubmit it. Prep the USB to wait for 1159 * another frame */ 1160 usb_fill_bulk_urb(urb, serial->parent->usb, 1161 usb_rcvbulkpipe(serial->parent->usb, 1162 serial->in_endp-> 1163 bEndpointAddress & 0x7F), 1164 urb->transfer_buffer, serial->rx_data_length, 1165 hso_std_serial_read_bulk_callback, serial); 1166 /* Give this to the USB subsystem so it can tell us when more data 1167 * arrives. */ 1168 result = usb_submit_urb(urb, GFP_ATOMIC); 1169 if (result) { 1170 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1171 __func__, result); 1172 } 1173 } 1174 1175 1176 1177 1178 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1179 { 1180 int count; 1181 struct urb *curr_urb; 1182 1183 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1184 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1185 count = put_rxbuf_data(curr_urb, serial); 1186 if (count == -1) 1187 return; 1188 if (count == 0) { 1189 serial->curr_rx_urb_idx++; 1190 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1191 serial->curr_rx_urb_idx = 0; 1192 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1193 } 1194 } 1195 } 1196 1197 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1198 { 1199 int count = 0; 1200 struct urb *urb; 1201 1202 urb = serial->rx_urb[0]; 1203 if (serial->open_count > 0) { 1204 count = put_rxbuf_data(urb, serial); 1205 if (count == -1) 1206 return; 1207 } 1208 /* Re issue a read as long as we receive data. */ 1209 1210 if (count == 0 && ((urb->actual_length != 0) || 1211 (serial->rx_state == RX_PENDING))) { 1212 serial->rx_state = RX_SENT; 1213 hso_mux_serial_read(serial); 1214 } else 1215 serial->rx_state = RX_IDLE; 1216 } 1217 1218 1219 /* read callback for Diag and CS port */ 1220 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1221 { 1222 struct hso_serial *serial = urb->context; 1223 int status = urb->status; 1224 1225 /* sanity check */ 1226 if (!serial) { 1227 D1("serial == NULL"); 1228 return; 1229 } else if (status) { 1230 handle_usb_error(status, __func__, serial->parent); 1231 return; 1232 } 1233 1234 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1235 D1("Actual length = %d\n", urb->actual_length); 1236 DUMP1(urb->transfer_buffer, urb->actual_length); 1237 1238 /* Anyone listening? */ 1239 if (serial->open_count == 0) 1240 return; 1241 1242 if (status == 0) { 1243 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1244 u32 rest; 1245 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1246 rest = 1247 urb->actual_length % 1248 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1249 if (((rest == 5) || (rest == 6)) && 1250 !memcmp(((u8 *) urb->transfer_buffer) + 1251 urb->actual_length - 4, crc_check, 4)) { 1252 urb->actual_length -= 4; 1253 } 1254 } 1255 /* Valid data, handle RX data */ 1256 spin_lock(&serial->serial_lock); 1257 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1258 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1259 spin_unlock(&serial->serial_lock); 1260 } else if (status == -ENOENT || status == -ECONNRESET) { 1261 /* Unlinked - check for throttled port. */ 1262 D2("Port %d, successfully unlinked urb", serial->minor); 1263 spin_lock(&serial->serial_lock); 1264 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1265 hso_resubmit_rx_bulk_urb(serial, urb); 1266 spin_unlock(&serial->serial_lock); 1267 } else { 1268 D2("Port %d, status = %d for read urb", serial->minor, status); 1269 return; 1270 } 1271 } 1272 1273 /* 1274 * This needs to be a tasklet otherwise we will 1275 * end up recursively calling this function. 1276 */ 1277 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1278 { 1279 unsigned long flags; 1280 1281 spin_lock_irqsave(&serial->serial_lock, flags); 1282 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1283 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1284 else 1285 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1286 spin_unlock_irqrestore(&serial->serial_lock, flags); 1287 } 1288 1289 static void hso_unthrottle(struct tty_struct *tty) 1290 { 1291 struct hso_serial *serial = get_serial_by_tty(tty); 1292 1293 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1294 } 1295 1296 static void hso_unthrottle_workfunc(struct work_struct *work) 1297 { 1298 struct hso_serial *serial = 1299 container_of(work, struct hso_serial, 1300 retry_unthrottle_workqueue); 1301 hso_unthrottle_tasklet(serial); 1302 } 1303 1304 /* open the requested serial port */ 1305 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1306 { 1307 struct hso_serial *serial = get_serial_by_index(tty->index); 1308 int result; 1309 1310 /* sanity check */ 1311 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1312 WARN_ON(1); 1313 tty->driver_data = NULL; 1314 D1("Failed to open port"); 1315 return -ENODEV; 1316 } 1317 1318 mutex_lock(&serial->parent->mutex); 1319 result = usb_autopm_get_interface(serial->parent->interface); 1320 if (result < 0) 1321 goto err_out; 1322 1323 D1("Opening %d", serial->minor); 1324 kref_get(&serial->parent->ref); 1325 1326 /* setup */ 1327 spin_lock_irq(&serial->serial_lock); 1328 tty->driver_data = serial; 1329 tty_kref_put(serial->tty); 1330 serial->tty = tty_kref_get(tty); 1331 spin_unlock_irq(&serial->serial_lock); 1332 1333 /* check for port already opened, if not set the termios */ 1334 serial->open_count++; 1335 if (serial->open_count == 1) { 1336 serial->rx_state = RX_IDLE; 1337 /* Force default termio settings */ 1338 _hso_serial_set_termios(tty, NULL); 1339 tasklet_init(&serial->unthrottle_tasklet, 1340 (void (*)(unsigned long))hso_unthrottle_tasklet, 1341 (unsigned long)serial); 1342 INIT_WORK(&serial->retry_unthrottle_workqueue, 1343 hso_unthrottle_workfunc); 1344 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1345 if (result) { 1346 hso_stop_serial_device(serial->parent); 1347 serial->open_count--; 1348 kref_put(&serial->parent->ref, hso_serial_ref_free); 1349 } 1350 } else { 1351 D1("Port was already open"); 1352 } 1353 1354 usb_autopm_put_interface(serial->parent->interface); 1355 1356 /* done */ 1357 if (result) 1358 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1359 err_out: 1360 mutex_unlock(&serial->parent->mutex); 1361 return result; 1362 } 1363 1364 /* close the requested serial port */ 1365 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1366 { 1367 struct hso_serial *serial = tty->driver_data; 1368 u8 usb_gone; 1369 1370 D1("Closing serial port"); 1371 1372 /* Open failed, no close cleanup required */ 1373 if (serial == NULL) 1374 return; 1375 1376 mutex_lock(&serial->parent->mutex); 1377 usb_gone = serial->parent->usb_gone; 1378 1379 if (!usb_gone) 1380 usb_autopm_get_interface(serial->parent->interface); 1381 1382 /* reset the rts and dtr */ 1383 /* do the actual close */ 1384 serial->open_count--; 1385 1386 if (serial->open_count <= 0) { 1387 serial->open_count = 0; 1388 spin_lock_irq(&serial->serial_lock); 1389 if (serial->tty == tty) { 1390 serial->tty->driver_data = NULL; 1391 serial->tty = NULL; 1392 tty_kref_put(tty); 1393 } 1394 spin_unlock_irq(&serial->serial_lock); 1395 if (!usb_gone) 1396 hso_stop_serial_device(serial->parent); 1397 tasklet_kill(&serial->unthrottle_tasklet); 1398 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1399 } 1400 1401 if (!usb_gone) 1402 usb_autopm_put_interface(serial->parent->interface); 1403 1404 mutex_unlock(&serial->parent->mutex); 1405 1406 kref_put(&serial->parent->ref, hso_serial_ref_free); 1407 } 1408 1409 /* close the requested serial port */ 1410 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1411 int count) 1412 { 1413 struct hso_serial *serial = get_serial_by_tty(tty); 1414 int space, tx_bytes; 1415 unsigned long flags; 1416 1417 /* sanity check */ 1418 if (serial == NULL) { 1419 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1420 return -ENODEV; 1421 } 1422 1423 spin_lock_irqsave(&serial->serial_lock, flags); 1424 1425 space = serial->tx_data_length - serial->tx_buffer_count; 1426 tx_bytes = (count < space) ? count : space; 1427 1428 if (!tx_bytes) 1429 goto out; 1430 1431 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1432 serial->tx_buffer_count += tx_bytes; 1433 1434 out: 1435 spin_unlock_irqrestore(&serial->serial_lock, flags); 1436 1437 hso_kick_transmit(serial); 1438 /* done */ 1439 return tx_bytes; 1440 } 1441 1442 /* how much room is there for writing */ 1443 static int hso_serial_write_room(struct tty_struct *tty) 1444 { 1445 struct hso_serial *serial = get_serial_by_tty(tty); 1446 int room; 1447 unsigned long flags; 1448 1449 spin_lock_irqsave(&serial->serial_lock, flags); 1450 room = serial->tx_data_length - serial->tx_buffer_count; 1451 spin_unlock_irqrestore(&serial->serial_lock, flags); 1452 1453 /* return free room */ 1454 return room; 1455 } 1456 1457 /* setup the term */ 1458 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1459 { 1460 struct hso_serial *serial = get_serial_by_tty(tty); 1461 unsigned long flags; 1462 1463 if (old) 1464 D5("Termios called with: cflags new[%d] - old[%d]", 1465 tty->termios->c_cflag, old->c_cflag); 1466 1467 /* the actual setup */ 1468 spin_lock_irqsave(&serial->serial_lock, flags); 1469 if (serial->open_count) 1470 _hso_serial_set_termios(tty, old); 1471 else 1472 tty->termios = old; 1473 spin_unlock_irqrestore(&serial->serial_lock, flags); 1474 1475 /* done */ 1476 } 1477 1478 /* how many characters in the buffer */ 1479 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1480 { 1481 struct hso_serial *serial = get_serial_by_tty(tty); 1482 int chars; 1483 unsigned long flags; 1484 1485 /* sanity check */ 1486 if (serial == NULL) 1487 return 0; 1488 1489 spin_lock_irqsave(&serial->serial_lock, flags); 1490 chars = serial->tx_buffer_count; 1491 spin_unlock_irqrestore(&serial->serial_lock, flags); 1492 1493 return chars; 1494 } 1495 static int tiocmget_submit_urb(struct hso_serial *serial, 1496 struct hso_tiocmget *tiocmget, 1497 struct usb_device *usb) 1498 { 1499 int result; 1500 1501 if (serial->parent->usb_gone) 1502 return -ENODEV; 1503 usb_fill_int_urb(tiocmget->urb, usb, 1504 usb_rcvintpipe(usb, 1505 tiocmget->endp-> 1506 bEndpointAddress & 0x7F), 1507 &tiocmget->serial_state_notification, 1508 sizeof(struct hso_serial_state_notification), 1509 tiocmget_intr_callback, serial, 1510 tiocmget->endp->bInterval); 1511 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1512 if (result) { 1513 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1514 result); 1515 } 1516 return result; 1517 1518 } 1519 1520 static void tiocmget_intr_callback(struct urb *urb) 1521 { 1522 struct hso_serial *serial = urb->context; 1523 struct hso_tiocmget *tiocmget; 1524 int status = urb->status; 1525 u16 UART_state_bitmap, prev_UART_state_bitmap; 1526 struct uart_icount *icount; 1527 struct hso_serial_state_notification *serial_state_notification; 1528 struct usb_device *usb; 1529 1530 /* Sanity checks */ 1531 if (!serial) 1532 return; 1533 if (status) { 1534 handle_usb_error(status, __func__, serial->parent); 1535 return; 1536 } 1537 tiocmget = serial->tiocmget; 1538 if (!tiocmget) 1539 return; 1540 usb = serial->parent->usb; 1541 serial_state_notification = &tiocmget->serial_state_notification; 1542 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1543 serial_state_notification->bNotification != B_NOTIFICATION || 1544 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1545 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1546 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1547 dev_warn(&usb->dev, 1548 "hso received invalid serial state notification\n"); 1549 DUMP(serial_state_notification, 1550 sizeof(struct hso_serial_state_notification)); 1551 } else { 1552 1553 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1554 UART_state_bitmap); 1555 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1556 icount = &tiocmget->icount; 1557 spin_lock(&serial->serial_lock); 1558 if ((UART_state_bitmap & B_OVERRUN) != 1559 (prev_UART_state_bitmap & B_OVERRUN)) 1560 icount->parity++; 1561 if ((UART_state_bitmap & B_PARITY) != 1562 (prev_UART_state_bitmap & B_PARITY)) 1563 icount->parity++; 1564 if ((UART_state_bitmap & B_FRAMING) != 1565 (prev_UART_state_bitmap & B_FRAMING)) 1566 icount->frame++; 1567 if ((UART_state_bitmap & B_RING_SIGNAL) && 1568 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1569 icount->rng++; 1570 if ((UART_state_bitmap & B_BREAK) != 1571 (prev_UART_state_bitmap & B_BREAK)) 1572 icount->brk++; 1573 if ((UART_state_bitmap & B_TX_CARRIER) != 1574 (prev_UART_state_bitmap & B_TX_CARRIER)) 1575 icount->dsr++; 1576 if ((UART_state_bitmap & B_RX_CARRIER) != 1577 (prev_UART_state_bitmap & B_RX_CARRIER)) 1578 icount->dcd++; 1579 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1580 spin_unlock(&serial->serial_lock); 1581 tiocmget->intr_completed = 1; 1582 wake_up_interruptible(&tiocmget->waitq); 1583 } 1584 memset(serial_state_notification, 0, 1585 sizeof(struct hso_serial_state_notification)); 1586 tiocmget_submit_urb(serial, 1587 tiocmget, 1588 serial->parent->usb); 1589 } 1590 1591 /* 1592 * next few functions largely stolen from drivers/serial/serial_core.c 1593 */ 1594 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1595 * - mask passed in arg for lines of interest 1596 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1597 * Caller should use TIOCGICOUNT to see which one it was 1598 */ 1599 static int 1600 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1601 { 1602 DECLARE_WAITQUEUE(wait, current); 1603 struct uart_icount cprev, cnow; 1604 struct hso_tiocmget *tiocmget; 1605 int ret; 1606 1607 tiocmget = serial->tiocmget; 1608 if (!tiocmget) 1609 return -ENOENT; 1610 /* 1611 * note the counters on entry 1612 */ 1613 spin_lock_irq(&serial->serial_lock); 1614 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1615 spin_unlock_irq(&serial->serial_lock); 1616 add_wait_queue(&tiocmget->waitq, &wait); 1617 for (;;) { 1618 spin_lock_irq(&serial->serial_lock); 1619 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1620 spin_unlock_irq(&serial->serial_lock); 1621 set_current_state(TASK_INTERRUPTIBLE); 1622 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1623 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1624 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1625 ret = 0; 1626 break; 1627 } 1628 schedule(); 1629 /* see if a signal did it */ 1630 if (signal_pending(current)) { 1631 ret = -ERESTARTSYS; 1632 break; 1633 } 1634 cprev = cnow; 1635 } 1636 current->state = TASK_RUNNING; 1637 remove_wait_queue(&tiocmget->waitq, &wait); 1638 1639 return ret; 1640 } 1641 1642 /* 1643 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1644 * Return: write counters to the user passed counter struct 1645 * NB: both 1->0 and 0->1 transitions are counted except for 1646 * RI where only 0->1 is counted. 1647 */ 1648 static int hso_get_count(struct hso_serial *serial, 1649 struct serial_icounter_struct __user *icnt) 1650 { 1651 struct serial_icounter_struct icount; 1652 struct uart_icount cnow; 1653 struct hso_tiocmget *tiocmget = serial->tiocmget; 1654 1655 if (!tiocmget) 1656 return -ENOENT; 1657 spin_lock_irq(&serial->serial_lock); 1658 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1659 spin_unlock_irq(&serial->serial_lock); 1660 1661 icount.cts = cnow.cts; 1662 icount.dsr = cnow.dsr; 1663 icount.rng = cnow.rng; 1664 icount.dcd = cnow.dcd; 1665 icount.rx = cnow.rx; 1666 icount.tx = cnow.tx; 1667 icount.frame = cnow.frame; 1668 icount.overrun = cnow.overrun; 1669 icount.parity = cnow.parity; 1670 icount.brk = cnow.brk; 1671 icount.buf_overrun = cnow.buf_overrun; 1672 1673 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1674 } 1675 1676 1677 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1678 { 1679 int retval; 1680 struct hso_serial *serial = get_serial_by_tty(tty); 1681 struct hso_tiocmget *tiocmget; 1682 u16 UART_state_bitmap; 1683 1684 /* sanity check */ 1685 if (!serial) { 1686 D1("no tty structures"); 1687 return -EINVAL; 1688 } 1689 spin_lock_irq(&serial->serial_lock); 1690 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1691 ((serial->dtr_state) ? TIOCM_DTR : 0); 1692 tiocmget = serial->tiocmget; 1693 if (tiocmget) { 1694 1695 UART_state_bitmap = le16_to_cpu( 1696 tiocmget->prev_UART_state_bitmap); 1697 if (UART_state_bitmap & B_RING_SIGNAL) 1698 retval |= TIOCM_RNG; 1699 if (UART_state_bitmap & B_RX_CARRIER) 1700 retval |= TIOCM_CD; 1701 if (UART_state_bitmap & B_TX_CARRIER) 1702 retval |= TIOCM_DSR; 1703 } 1704 spin_unlock_irq(&serial->serial_lock); 1705 return retval; 1706 } 1707 1708 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1709 unsigned int set, unsigned int clear) 1710 { 1711 int val = 0; 1712 unsigned long flags; 1713 int if_num; 1714 struct hso_serial *serial = get_serial_by_tty(tty); 1715 1716 /* sanity check */ 1717 if (!serial) { 1718 D1("no tty structures"); 1719 return -EINVAL; 1720 } 1721 1722 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1723 return -EINVAL; 1724 1725 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1726 1727 spin_lock_irqsave(&serial->serial_lock, flags); 1728 if (set & TIOCM_RTS) 1729 serial->rts_state = 1; 1730 if (set & TIOCM_DTR) 1731 serial->dtr_state = 1; 1732 1733 if (clear & TIOCM_RTS) 1734 serial->rts_state = 0; 1735 if (clear & TIOCM_DTR) 1736 serial->dtr_state = 0; 1737 1738 if (serial->dtr_state) 1739 val |= 0x01; 1740 if (serial->rts_state) 1741 val |= 0x02; 1742 1743 spin_unlock_irqrestore(&serial->serial_lock, flags); 1744 1745 return usb_control_msg(serial->parent->usb, 1746 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1747 0x21, val, if_num, NULL, 0, 1748 USB_CTRL_SET_TIMEOUT); 1749 } 1750 1751 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1752 unsigned int cmd, unsigned long arg) 1753 { 1754 struct hso_serial *serial = get_serial_by_tty(tty); 1755 void __user *uarg = (void __user *)arg; 1756 int ret = 0; 1757 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1758 1759 if (!serial) 1760 return -ENODEV; 1761 switch (cmd) { 1762 case TIOCMIWAIT: 1763 ret = hso_wait_modem_status(serial, arg); 1764 break; 1765 1766 case TIOCGICOUNT: 1767 ret = hso_get_count(serial, uarg); 1768 break; 1769 default: 1770 ret = -ENOIOCTLCMD; 1771 break; 1772 } 1773 return ret; 1774 } 1775 1776 1777 /* starts a transmit */ 1778 static void hso_kick_transmit(struct hso_serial *serial) 1779 { 1780 u8 *temp; 1781 unsigned long flags; 1782 int res; 1783 1784 spin_lock_irqsave(&serial->serial_lock, flags); 1785 if (!serial->tx_buffer_count) 1786 goto out; 1787 1788 if (serial->tx_urb_used) 1789 goto out; 1790 1791 /* Wakeup USB interface if necessary */ 1792 if (hso_get_activity(serial->parent) == -EAGAIN) 1793 goto out; 1794 1795 /* Switch pointers around to avoid memcpy */ 1796 temp = serial->tx_buffer; 1797 serial->tx_buffer = serial->tx_data; 1798 serial->tx_data = temp; 1799 serial->tx_data_count = serial->tx_buffer_count; 1800 serial->tx_buffer_count = 0; 1801 1802 /* If temp is set, it means we switched buffers */ 1803 if (temp && serial->write_data) { 1804 res = serial->write_data(serial); 1805 if (res >= 0) 1806 serial->tx_urb_used = 1; 1807 } 1808 out: 1809 spin_unlock_irqrestore(&serial->serial_lock, flags); 1810 } 1811 1812 /* make a request (for reading and writing data to muxed serial port) */ 1813 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1814 struct urb *ctrl_urb, 1815 struct usb_ctrlrequest *ctrl_req, 1816 u8 *ctrl_urb_data, u32 size) 1817 { 1818 int result; 1819 int pipe; 1820 1821 /* Sanity check */ 1822 if (!serial || !ctrl_urb || !ctrl_req) { 1823 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1824 return -EINVAL; 1825 } 1826 1827 /* initialize */ 1828 ctrl_req->wValue = 0; 1829 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1830 ctrl_req->wLength = cpu_to_le16(size); 1831 1832 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1833 /* Reading command */ 1834 ctrl_req->bRequestType = USB_DIR_IN | 1835 USB_TYPE_OPTION_VENDOR | 1836 USB_RECIP_INTERFACE; 1837 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1838 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1839 } else { 1840 /* Writing command */ 1841 ctrl_req->bRequestType = USB_DIR_OUT | 1842 USB_TYPE_OPTION_VENDOR | 1843 USB_RECIP_INTERFACE; 1844 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1845 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1846 } 1847 /* syslog */ 1848 D2("%s command (%02x) len: %d, port: %d", 1849 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1850 ctrl_req->bRequestType, ctrl_req->wLength, port); 1851 1852 /* Load ctrl urb */ 1853 ctrl_urb->transfer_flags = 0; 1854 usb_fill_control_urb(ctrl_urb, 1855 serial->parent->usb, 1856 pipe, 1857 (u8 *) ctrl_req, 1858 ctrl_urb_data, size, ctrl_callback, serial); 1859 /* Send it on merry way */ 1860 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1861 if (result) { 1862 dev_err(&ctrl_urb->dev->dev, 1863 "%s failed submit ctrl_urb %d type %d\n", __func__, 1864 result, type); 1865 return result; 1866 } 1867 1868 /* done */ 1869 return size; 1870 } 1871 1872 /* called by intr_callback when read occurs */ 1873 static int hso_mux_serial_read(struct hso_serial *serial) 1874 { 1875 if (!serial) 1876 return -EINVAL; 1877 1878 /* clean data */ 1879 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1880 /* make the request */ 1881 1882 if (serial->num_rx_urbs != 1) { 1883 dev_err(&serial->parent->interface->dev, 1884 "ERROR: mux'd reads with multiple buffers " 1885 "not possible\n"); 1886 return 0; 1887 } 1888 return mux_device_request(serial, 1889 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1890 serial->parent->port_spec & HSO_PORT_MASK, 1891 serial->rx_urb[0], 1892 &serial->ctrl_req_rx, 1893 serial->rx_data[0], serial->rx_data_length); 1894 } 1895 1896 /* used for muxed serial port callback (muxed serial read) */ 1897 static void intr_callback(struct urb *urb) 1898 { 1899 struct hso_shared_int *shared_int = urb->context; 1900 struct hso_serial *serial; 1901 unsigned char *port_req; 1902 int status = urb->status; 1903 int i; 1904 1905 usb_mark_last_busy(urb->dev); 1906 1907 /* sanity check */ 1908 if (!shared_int) 1909 return; 1910 1911 /* status check */ 1912 if (status) { 1913 handle_usb_error(status, __func__, NULL); 1914 return; 1915 } 1916 D4("\n--- Got intr callback 0x%02X ---", status); 1917 1918 /* what request? */ 1919 port_req = urb->transfer_buffer; 1920 D4(" port_req = 0x%.2X\n", *port_req); 1921 /* loop over all muxed ports to find the one sending this */ 1922 for (i = 0; i < 8; i++) { 1923 /* max 8 channels on MUX */ 1924 if (*port_req & (1 << i)) { 1925 serial = get_serial_by_shared_int_and_type(shared_int, 1926 (1 << i)); 1927 if (serial != NULL) { 1928 D1("Pending read interrupt on port %d\n", i); 1929 spin_lock(&serial->serial_lock); 1930 if (serial->rx_state == RX_IDLE && 1931 serial->open_count > 0) { 1932 /* Setup and send a ctrl req read on 1933 * port i */ 1934 if (!serial->rx_urb_filled[0]) { 1935 serial->rx_state = RX_SENT; 1936 hso_mux_serial_read(serial); 1937 } else 1938 serial->rx_state = RX_PENDING; 1939 } else { 1940 D1("Already a read pending on " 1941 "port %d or port not open\n", i); 1942 } 1943 spin_unlock(&serial->serial_lock); 1944 } 1945 } 1946 } 1947 /* Resubmit interrupt urb */ 1948 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1949 } 1950 1951 /* called for writing to muxed serial port */ 1952 static int hso_mux_serial_write_data(struct hso_serial *serial) 1953 { 1954 if (NULL == serial) 1955 return -EINVAL; 1956 1957 return mux_device_request(serial, 1958 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1959 serial->parent->port_spec & HSO_PORT_MASK, 1960 serial->tx_urb, 1961 &serial->ctrl_req_tx, 1962 serial->tx_data, serial->tx_data_count); 1963 } 1964 1965 /* write callback for Diag and CS port */ 1966 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1967 { 1968 struct hso_serial *serial = urb->context; 1969 int status = urb->status; 1970 struct tty_struct *tty; 1971 1972 /* sanity check */ 1973 if (!serial) { 1974 D1("serial == NULL"); 1975 return; 1976 } 1977 1978 spin_lock(&serial->serial_lock); 1979 serial->tx_urb_used = 0; 1980 tty = tty_kref_get(serial->tty); 1981 spin_unlock(&serial->serial_lock); 1982 if (status) { 1983 handle_usb_error(status, __func__, serial->parent); 1984 tty_kref_put(tty); 1985 return; 1986 } 1987 hso_put_activity(serial->parent); 1988 if (tty) { 1989 tty_wakeup(tty); 1990 tty_kref_put(tty); 1991 } 1992 hso_kick_transmit(serial); 1993 1994 D1(" "); 1995 } 1996 1997 /* called for writing diag or CS serial port */ 1998 static int hso_std_serial_write_data(struct hso_serial *serial) 1999 { 2000 int count = serial->tx_data_count; 2001 int result; 2002 2003 usb_fill_bulk_urb(serial->tx_urb, 2004 serial->parent->usb, 2005 usb_sndbulkpipe(serial->parent->usb, 2006 serial->out_endp-> 2007 bEndpointAddress & 0x7F), 2008 serial->tx_data, serial->tx_data_count, 2009 hso_std_serial_write_bulk_callback, serial); 2010 2011 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2012 if (result) { 2013 dev_warn(&serial->parent->usb->dev, 2014 "Failed to submit urb - res %d\n", result); 2015 return result; 2016 } 2017 2018 return count; 2019 } 2020 2021 /* callback after read or write on muxed serial port */ 2022 static void ctrl_callback(struct urb *urb) 2023 { 2024 struct hso_serial *serial = urb->context; 2025 struct usb_ctrlrequest *req; 2026 int status = urb->status; 2027 struct tty_struct *tty; 2028 2029 /* sanity check */ 2030 if (!serial) 2031 return; 2032 2033 spin_lock(&serial->serial_lock); 2034 serial->tx_urb_used = 0; 2035 tty = tty_kref_get(serial->tty); 2036 spin_unlock(&serial->serial_lock); 2037 if (status) { 2038 handle_usb_error(status, __func__, serial->parent); 2039 tty_kref_put(tty); 2040 return; 2041 } 2042 2043 /* what request? */ 2044 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2045 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2046 D4("Actual length of urb = %d\n", urb->actual_length); 2047 DUMP1(urb->transfer_buffer, urb->actual_length); 2048 2049 if (req->bRequestType == 2050 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2051 /* response to a read command */ 2052 serial->rx_urb_filled[0] = 1; 2053 spin_lock(&serial->serial_lock); 2054 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2055 spin_unlock(&serial->serial_lock); 2056 } else { 2057 hso_put_activity(serial->parent); 2058 if (tty) 2059 tty_wakeup(tty); 2060 /* response to a write command */ 2061 hso_kick_transmit(serial); 2062 } 2063 tty_kref_put(tty); 2064 } 2065 2066 /* handle RX data for serial port */ 2067 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2068 { 2069 struct tty_struct *tty; 2070 int write_length_remaining = 0; 2071 int curr_write_len; 2072 2073 /* Sanity check */ 2074 if (urb == NULL || serial == NULL) { 2075 D1("serial = NULL"); 2076 return -2; 2077 } 2078 2079 /* All callers to put_rxbuf_data hold serial_lock */ 2080 tty = tty_kref_get(serial->tty); 2081 2082 /* Push data to tty */ 2083 if (tty) { 2084 write_length_remaining = urb->actual_length - 2085 serial->curr_rx_urb_offset; 2086 D1("data to push to tty"); 2087 while (write_length_remaining) { 2088 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2089 tty_kref_put(tty); 2090 return -1; 2091 } 2092 curr_write_len = tty_insert_flip_string 2093 (tty, urb->transfer_buffer + 2094 serial->curr_rx_urb_offset, 2095 write_length_remaining); 2096 serial->curr_rx_urb_offset += curr_write_len; 2097 write_length_remaining -= curr_write_len; 2098 tty_flip_buffer_push(tty); 2099 } 2100 } 2101 if (write_length_remaining == 0) { 2102 serial->curr_rx_urb_offset = 0; 2103 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2104 } 2105 tty_kref_put(tty); 2106 return write_length_remaining; 2107 } 2108 2109 2110 /* Base driver functions */ 2111 2112 static void hso_log_port(struct hso_device *hso_dev) 2113 { 2114 char *port_type; 2115 char port_dev[20]; 2116 2117 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2118 case HSO_PORT_CONTROL: 2119 port_type = "Control"; 2120 break; 2121 case HSO_PORT_APP: 2122 port_type = "Application"; 2123 break; 2124 case HSO_PORT_GPS: 2125 port_type = "GPS"; 2126 break; 2127 case HSO_PORT_GPS_CONTROL: 2128 port_type = "GPS control"; 2129 break; 2130 case HSO_PORT_APP2: 2131 port_type = "Application2"; 2132 break; 2133 case HSO_PORT_PCSC: 2134 port_type = "PCSC"; 2135 break; 2136 case HSO_PORT_DIAG: 2137 port_type = "Diagnostic"; 2138 break; 2139 case HSO_PORT_DIAG2: 2140 port_type = "Diagnostic2"; 2141 break; 2142 case HSO_PORT_MODEM: 2143 port_type = "Modem"; 2144 break; 2145 case HSO_PORT_NETWORK: 2146 port_type = "Network"; 2147 break; 2148 default: 2149 port_type = "Unknown"; 2150 break; 2151 } 2152 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2153 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2154 } else 2155 sprintf(port_dev, "/dev/%s%d", tty_filename, 2156 dev2ser(hso_dev)->minor); 2157 2158 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2159 port_type, port_dev); 2160 } 2161 2162 static int hso_start_net_device(struct hso_device *hso_dev) 2163 { 2164 int i, result = 0; 2165 struct hso_net *hso_net = dev2net(hso_dev); 2166 2167 if (!hso_net) 2168 return -ENODEV; 2169 2170 /* send URBs for all read buffers */ 2171 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2172 2173 /* Prep a receive URB */ 2174 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2175 hso_dev->usb, 2176 usb_rcvbulkpipe(hso_dev->usb, 2177 hso_net->in_endp-> 2178 bEndpointAddress & 0x7F), 2179 hso_net->mux_bulk_rx_buf_pool[i], 2180 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2181 hso_net); 2182 2183 /* Put it out there so the device can send us stuff */ 2184 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2185 GFP_NOIO); 2186 if (result) 2187 dev_warn(&hso_dev->usb->dev, 2188 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2189 i, result); 2190 } 2191 2192 return result; 2193 } 2194 2195 static int hso_stop_net_device(struct hso_device *hso_dev) 2196 { 2197 int i; 2198 struct hso_net *hso_net = dev2net(hso_dev); 2199 2200 if (!hso_net) 2201 return -ENODEV; 2202 2203 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2204 if (hso_net->mux_bulk_rx_urb_pool[i]) 2205 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2206 2207 } 2208 if (hso_net->mux_bulk_tx_urb) 2209 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2210 2211 return 0; 2212 } 2213 2214 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2215 { 2216 int i, result = 0; 2217 struct hso_serial *serial = dev2ser(hso_dev); 2218 2219 if (!serial) 2220 return -ENODEV; 2221 2222 /* If it is not the MUX port fill in and submit a bulk urb (already 2223 * allocated in hso_serial_start) */ 2224 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2225 for (i = 0; i < serial->num_rx_urbs; i++) { 2226 usb_fill_bulk_urb(serial->rx_urb[i], 2227 serial->parent->usb, 2228 usb_rcvbulkpipe(serial->parent->usb, 2229 serial->in_endp-> 2230 bEndpointAddress & 2231 0x7F), 2232 serial->rx_data[i], 2233 serial->rx_data_length, 2234 hso_std_serial_read_bulk_callback, 2235 serial); 2236 result = usb_submit_urb(serial->rx_urb[i], flags); 2237 if (result) { 2238 dev_warn(&serial->parent->usb->dev, 2239 "Failed to submit urb - res %d\n", 2240 result); 2241 break; 2242 } 2243 } 2244 } else { 2245 mutex_lock(&serial->shared_int->shared_int_lock); 2246 if (!serial->shared_int->use_count) { 2247 result = 2248 hso_mux_submit_intr_urb(serial->shared_int, 2249 hso_dev->usb, flags); 2250 } 2251 serial->shared_int->use_count++; 2252 mutex_unlock(&serial->shared_int->shared_int_lock); 2253 } 2254 if (serial->tiocmget) 2255 tiocmget_submit_urb(serial, 2256 serial->tiocmget, 2257 serial->parent->usb); 2258 return result; 2259 } 2260 2261 static int hso_stop_serial_device(struct hso_device *hso_dev) 2262 { 2263 int i; 2264 struct hso_serial *serial = dev2ser(hso_dev); 2265 struct hso_tiocmget *tiocmget; 2266 2267 if (!serial) 2268 return -ENODEV; 2269 2270 for (i = 0; i < serial->num_rx_urbs; i++) { 2271 if (serial->rx_urb[i]) { 2272 usb_kill_urb(serial->rx_urb[i]); 2273 serial->rx_urb_filled[i] = 0; 2274 } 2275 } 2276 serial->curr_rx_urb_idx = 0; 2277 serial->curr_rx_urb_offset = 0; 2278 2279 if (serial->tx_urb) 2280 usb_kill_urb(serial->tx_urb); 2281 2282 if (serial->shared_int) { 2283 mutex_lock(&serial->shared_int->shared_int_lock); 2284 if (serial->shared_int->use_count && 2285 (--serial->shared_int->use_count == 0)) { 2286 struct urb *urb; 2287 2288 urb = serial->shared_int->shared_intr_urb; 2289 if (urb) 2290 usb_kill_urb(urb); 2291 } 2292 mutex_unlock(&serial->shared_int->shared_int_lock); 2293 } 2294 tiocmget = serial->tiocmget; 2295 if (tiocmget) { 2296 wake_up_interruptible(&tiocmget->waitq); 2297 usb_kill_urb(tiocmget->urb); 2298 } 2299 2300 return 0; 2301 } 2302 2303 static void hso_serial_common_free(struct hso_serial *serial) 2304 { 2305 int i; 2306 2307 if (serial->parent->dev) 2308 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2309 2310 tty_unregister_device(tty_drv, serial->minor); 2311 2312 for (i = 0; i < serial->num_rx_urbs; i++) { 2313 /* unlink and free RX URB */ 2314 usb_free_urb(serial->rx_urb[i]); 2315 /* free the RX buffer */ 2316 kfree(serial->rx_data[i]); 2317 } 2318 2319 /* unlink and free TX URB */ 2320 usb_free_urb(serial->tx_urb); 2321 kfree(serial->tx_data); 2322 } 2323 2324 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2325 int rx_size, int tx_size) 2326 { 2327 struct device *dev; 2328 int minor; 2329 int i; 2330 2331 minor = get_free_serial_index(); 2332 if (minor < 0) 2333 goto exit; 2334 2335 /* register our minor number */ 2336 serial->parent->dev = tty_register_device(tty_drv, minor, 2337 &serial->parent->interface->dev); 2338 dev = serial->parent->dev; 2339 dev_set_drvdata(dev, serial->parent); 2340 i = device_create_file(dev, &dev_attr_hsotype); 2341 2342 /* fill in specific data for later use */ 2343 serial->minor = minor; 2344 serial->magic = HSO_SERIAL_MAGIC; 2345 spin_lock_init(&serial->serial_lock); 2346 serial->num_rx_urbs = num_urbs; 2347 2348 /* RX, allocate urb and initialize */ 2349 2350 /* prepare our RX buffer */ 2351 serial->rx_data_length = rx_size; 2352 for (i = 0; i < serial->num_rx_urbs; i++) { 2353 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2354 if (!serial->rx_urb[i]) { 2355 dev_err(dev, "Could not allocate urb?\n"); 2356 goto exit; 2357 } 2358 serial->rx_urb[i]->transfer_buffer = NULL; 2359 serial->rx_urb[i]->transfer_buffer_length = 0; 2360 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2361 GFP_KERNEL); 2362 if (!serial->rx_data[i]) { 2363 dev_err(dev, "%s - Out of memory\n", __func__); 2364 goto exit; 2365 } 2366 } 2367 2368 /* TX, allocate urb and initialize */ 2369 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2370 if (!serial->tx_urb) { 2371 dev_err(dev, "Could not allocate urb?\n"); 2372 goto exit; 2373 } 2374 serial->tx_urb->transfer_buffer = NULL; 2375 serial->tx_urb->transfer_buffer_length = 0; 2376 /* prepare our TX buffer */ 2377 serial->tx_data_count = 0; 2378 serial->tx_buffer_count = 0; 2379 serial->tx_data_length = tx_size; 2380 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2381 if (!serial->tx_data) { 2382 dev_err(dev, "%s - Out of memory\n", __func__); 2383 goto exit; 2384 } 2385 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2386 if (!serial->tx_buffer) { 2387 dev_err(dev, "%s - Out of memory\n", __func__); 2388 goto exit; 2389 } 2390 2391 return 0; 2392 exit: 2393 hso_serial_common_free(serial); 2394 return -1; 2395 } 2396 2397 /* Creates a general hso device */ 2398 static struct hso_device *hso_create_device(struct usb_interface *intf, 2399 int port_spec) 2400 { 2401 struct hso_device *hso_dev; 2402 2403 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2404 if (!hso_dev) 2405 return NULL; 2406 2407 hso_dev->port_spec = port_spec; 2408 hso_dev->usb = interface_to_usbdev(intf); 2409 hso_dev->interface = intf; 2410 kref_init(&hso_dev->ref); 2411 mutex_init(&hso_dev->mutex); 2412 2413 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2414 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2415 INIT_WORK(&hso_dev->reset_device, reset_device); 2416 2417 return hso_dev; 2418 } 2419 2420 /* Removes a network device in the network device table */ 2421 static int remove_net_device(struct hso_device *hso_dev) 2422 { 2423 int i; 2424 2425 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2426 if (network_table[i] == hso_dev) { 2427 network_table[i] = NULL; 2428 break; 2429 } 2430 } 2431 if (i == HSO_MAX_NET_DEVICES) 2432 return -1; 2433 return 0; 2434 } 2435 2436 /* Frees our network device */ 2437 static void hso_free_net_device(struct hso_device *hso_dev) 2438 { 2439 int i; 2440 struct hso_net *hso_net = dev2net(hso_dev); 2441 2442 if (!hso_net) 2443 return; 2444 2445 remove_net_device(hso_net->parent); 2446 2447 if (hso_net->net) { 2448 unregister_netdev(hso_net->net); 2449 free_netdev(hso_net->net); 2450 } 2451 2452 /* start freeing */ 2453 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2454 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2455 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2456 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2457 } 2458 usb_free_urb(hso_net->mux_bulk_tx_urb); 2459 kfree(hso_net->mux_bulk_tx_buf); 2460 hso_net->mux_bulk_tx_buf = NULL; 2461 2462 kfree(hso_dev); 2463 } 2464 2465 static const struct net_device_ops hso_netdev_ops = { 2466 .ndo_open = hso_net_open, 2467 .ndo_stop = hso_net_close, 2468 .ndo_start_xmit = hso_net_start_xmit, 2469 .ndo_tx_timeout = hso_net_tx_timeout, 2470 }; 2471 2472 /* initialize the network interface */ 2473 static void hso_net_init(struct net_device *net) 2474 { 2475 struct hso_net *hso_net = netdev_priv(net); 2476 2477 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2478 2479 /* fill in the other fields */ 2480 net->netdev_ops = &hso_netdev_ops; 2481 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2482 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2483 net->type = ARPHRD_NONE; 2484 net->mtu = DEFAULT_MTU - 14; 2485 net->tx_queue_len = 10; 2486 SET_ETHTOOL_OPS(net, &ops); 2487 2488 /* and initialize the semaphore */ 2489 spin_lock_init(&hso_net->net_lock); 2490 } 2491 2492 /* Adds a network device in the network device table */ 2493 static int add_net_device(struct hso_device *hso_dev) 2494 { 2495 int i; 2496 2497 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2498 if (network_table[i] == NULL) { 2499 network_table[i] = hso_dev; 2500 break; 2501 } 2502 } 2503 if (i == HSO_MAX_NET_DEVICES) 2504 return -1; 2505 return 0; 2506 } 2507 2508 static int hso_rfkill_set_block(void *data, bool blocked) 2509 { 2510 struct hso_device *hso_dev = data; 2511 int enabled = !blocked; 2512 int rv; 2513 2514 mutex_lock(&hso_dev->mutex); 2515 if (hso_dev->usb_gone) 2516 rv = 0; 2517 else 2518 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2519 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2520 USB_CTRL_SET_TIMEOUT); 2521 mutex_unlock(&hso_dev->mutex); 2522 return rv; 2523 } 2524 2525 static const struct rfkill_ops hso_rfkill_ops = { 2526 .set_block = hso_rfkill_set_block, 2527 }; 2528 2529 /* Creates and sets up everything for rfkill */ 2530 static void hso_create_rfkill(struct hso_device *hso_dev, 2531 struct usb_interface *interface) 2532 { 2533 struct hso_net *hso_net = dev2net(hso_dev); 2534 struct device *dev = &hso_net->net->dev; 2535 char *rfkn; 2536 2537 rfkn = kzalloc(20, GFP_KERNEL); 2538 if (!rfkn) 2539 dev_err(dev, "%s - Out of memory\n", __func__); 2540 2541 snprintf(rfkn, 20, "hso-%d", 2542 interface->altsetting->desc.bInterfaceNumber); 2543 2544 hso_net->rfkill = rfkill_alloc(rfkn, 2545 &interface_to_usbdev(interface)->dev, 2546 RFKILL_TYPE_WWAN, 2547 &hso_rfkill_ops, hso_dev); 2548 if (!hso_net->rfkill) { 2549 dev_err(dev, "%s - Out of memory\n", __func__); 2550 kfree(rfkn); 2551 return; 2552 } 2553 if (rfkill_register(hso_net->rfkill) < 0) { 2554 rfkill_destroy(hso_net->rfkill); 2555 kfree(rfkn); 2556 hso_net->rfkill = NULL; 2557 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2558 return; 2559 } 2560 } 2561 2562 static struct device_type hso_type = { 2563 .name = "wwan", 2564 }; 2565 2566 /* Creates our network device */ 2567 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2568 int port_spec) 2569 { 2570 int result, i; 2571 struct net_device *net; 2572 struct hso_net *hso_net; 2573 struct hso_device *hso_dev; 2574 2575 hso_dev = hso_create_device(interface, port_spec); 2576 if (!hso_dev) 2577 return NULL; 2578 2579 /* allocate our network device, then we can put in our private data */ 2580 /* call hso_net_init to do the basic initialization */ 2581 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2582 if (!net) { 2583 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2584 goto exit; 2585 } 2586 2587 hso_net = netdev_priv(net); 2588 2589 hso_dev->port_data.dev_net = hso_net; 2590 hso_net->net = net; 2591 hso_net->parent = hso_dev; 2592 2593 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2594 USB_DIR_IN); 2595 if (!hso_net->in_endp) { 2596 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2597 goto exit; 2598 } 2599 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2600 USB_DIR_OUT); 2601 if (!hso_net->out_endp) { 2602 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2603 goto exit; 2604 } 2605 SET_NETDEV_DEV(net, &interface->dev); 2606 SET_NETDEV_DEVTYPE(net, &hso_type); 2607 2608 /* registering our net device */ 2609 result = register_netdev(net); 2610 if (result) { 2611 dev_err(&interface->dev, "Failed to register device\n"); 2612 goto exit; 2613 } 2614 2615 /* start allocating */ 2616 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2617 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2618 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2619 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2620 goto exit; 2621 } 2622 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2623 GFP_KERNEL); 2624 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2625 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2626 goto exit; 2627 } 2628 } 2629 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2630 if (!hso_net->mux_bulk_tx_urb) { 2631 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2632 goto exit; 2633 } 2634 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2635 if (!hso_net->mux_bulk_tx_buf) { 2636 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2637 goto exit; 2638 } 2639 2640 add_net_device(hso_dev); 2641 2642 hso_log_port(hso_dev); 2643 2644 hso_create_rfkill(hso_dev, interface); 2645 2646 return hso_dev; 2647 exit: 2648 hso_free_net_device(hso_dev); 2649 return NULL; 2650 } 2651 2652 static void hso_free_tiomget(struct hso_serial *serial) 2653 { 2654 struct hso_tiocmget *tiocmget = serial->tiocmget; 2655 if (tiocmget) { 2656 if (tiocmget->urb) { 2657 usb_free_urb(tiocmget->urb); 2658 tiocmget->urb = NULL; 2659 } 2660 serial->tiocmget = NULL; 2661 kfree(tiocmget); 2662 2663 } 2664 } 2665 2666 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2667 static void hso_free_serial_device(struct hso_device *hso_dev) 2668 { 2669 struct hso_serial *serial = dev2ser(hso_dev); 2670 2671 if (!serial) 2672 return; 2673 set_serial_by_index(serial->minor, NULL); 2674 2675 hso_serial_common_free(serial); 2676 2677 if (serial->shared_int) { 2678 mutex_lock(&serial->shared_int->shared_int_lock); 2679 if (--serial->shared_int->ref_count == 0) 2680 hso_free_shared_int(serial->shared_int); 2681 else 2682 mutex_unlock(&serial->shared_int->shared_int_lock); 2683 } 2684 hso_free_tiomget(serial); 2685 kfree(serial); 2686 kfree(hso_dev); 2687 } 2688 2689 /* Creates a bulk AT channel */ 2690 static struct hso_device *hso_create_bulk_serial_device( 2691 struct usb_interface *interface, int port) 2692 { 2693 struct hso_device *hso_dev; 2694 struct hso_serial *serial; 2695 int num_urbs; 2696 struct hso_tiocmget *tiocmget; 2697 2698 hso_dev = hso_create_device(interface, port); 2699 if (!hso_dev) 2700 return NULL; 2701 2702 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2703 if (!serial) 2704 goto exit; 2705 2706 serial->parent = hso_dev; 2707 hso_dev->port_data.dev_serial = serial; 2708 2709 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2710 num_urbs = 2; 2711 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2712 GFP_KERNEL); 2713 /* it isn't going to break our heart if serial->tiocmget 2714 * allocation fails don't bother checking this. 2715 */ 2716 if (serial->tiocmget) { 2717 tiocmget = serial->tiocmget; 2718 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2719 if (tiocmget->urb) { 2720 mutex_init(&tiocmget->mutex); 2721 init_waitqueue_head(&tiocmget->waitq); 2722 tiocmget->endp = hso_get_ep( 2723 interface, 2724 USB_ENDPOINT_XFER_INT, 2725 USB_DIR_IN); 2726 } else 2727 hso_free_tiomget(serial); 2728 } 2729 } 2730 else 2731 num_urbs = 1; 2732 2733 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2734 BULK_URB_TX_SIZE)) 2735 goto exit; 2736 2737 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2738 USB_DIR_IN); 2739 if (!serial->in_endp) { 2740 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2741 goto exit2; 2742 } 2743 2744 if (! 2745 (serial->out_endp = 2746 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2747 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2748 goto exit2; 2749 } 2750 2751 serial->write_data = hso_std_serial_write_data; 2752 2753 /* and record this serial */ 2754 set_serial_by_index(serial->minor, serial); 2755 2756 /* setup the proc dirs and files if needed */ 2757 hso_log_port(hso_dev); 2758 2759 /* done, return it */ 2760 return hso_dev; 2761 2762 exit2: 2763 hso_serial_common_free(serial); 2764 exit: 2765 hso_free_tiomget(serial); 2766 kfree(serial); 2767 kfree(hso_dev); 2768 return NULL; 2769 } 2770 2771 /* Creates a multiplexed AT channel */ 2772 static 2773 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2774 int port, 2775 struct hso_shared_int *mux) 2776 { 2777 struct hso_device *hso_dev; 2778 struct hso_serial *serial; 2779 int port_spec; 2780 2781 port_spec = HSO_INTF_MUX; 2782 port_spec &= ~HSO_PORT_MASK; 2783 2784 port_spec |= hso_mux_to_port(port); 2785 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2786 return NULL; 2787 2788 hso_dev = hso_create_device(interface, port_spec); 2789 if (!hso_dev) 2790 return NULL; 2791 2792 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2793 if (!serial) 2794 goto exit; 2795 2796 hso_dev->port_data.dev_serial = serial; 2797 serial->parent = hso_dev; 2798 2799 if (hso_serial_common_create 2800 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2801 goto exit; 2802 2803 serial->tx_data_length--; 2804 serial->write_data = hso_mux_serial_write_data; 2805 2806 serial->shared_int = mux; 2807 mutex_lock(&serial->shared_int->shared_int_lock); 2808 serial->shared_int->ref_count++; 2809 mutex_unlock(&serial->shared_int->shared_int_lock); 2810 2811 /* and record this serial */ 2812 set_serial_by_index(serial->minor, serial); 2813 2814 /* setup the proc dirs and files if needed */ 2815 hso_log_port(hso_dev); 2816 2817 /* done, return it */ 2818 return hso_dev; 2819 2820 exit: 2821 if (serial) { 2822 tty_unregister_device(tty_drv, serial->minor); 2823 kfree(serial); 2824 } 2825 if (hso_dev) 2826 kfree(hso_dev); 2827 return NULL; 2828 2829 } 2830 2831 static void hso_free_shared_int(struct hso_shared_int *mux) 2832 { 2833 usb_free_urb(mux->shared_intr_urb); 2834 kfree(mux->shared_intr_buf); 2835 mutex_unlock(&mux->shared_int_lock); 2836 kfree(mux); 2837 } 2838 2839 static 2840 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2841 { 2842 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2843 2844 if (!mux) 2845 return NULL; 2846 2847 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2848 USB_DIR_IN); 2849 if (!mux->intr_endp) { 2850 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2851 goto exit; 2852 } 2853 2854 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2855 if (!mux->shared_intr_urb) { 2856 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2857 goto exit; 2858 } 2859 mux->shared_intr_buf = 2860 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2861 GFP_KERNEL); 2862 if (!mux->shared_intr_buf) { 2863 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2864 goto exit; 2865 } 2866 2867 mutex_init(&mux->shared_int_lock); 2868 2869 return mux; 2870 2871 exit: 2872 kfree(mux->shared_intr_buf); 2873 usb_free_urb(mux->shared_intr_urb); 2874 kfree(mux); 2875 return NULL; 2876 } 2877 2878 /* Gets the port spec for a certain interface */ 2879 static int hso_get_config_data(struct usb_interface *interface) 2880 { 2881 struct usb_device *usbdev = interface_to_usbdev(interface); 2882 u8 config_data[17]; 2883 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2884 s32 result; 2885 2886 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2887 0x86, 0xC0, 0, 0, config_data, 17, 2888 USB_CTRL_SET_TIMEOUT) != 0x11) { 2889 return -EIO; 2890 } 2891 2892 switch (config_data[if_num]) { 2893 case 0x0: 2894 result = 0; 2895 break; 2896 case 0x1: 2897 result = HSO_PORT_DIAG; 2898 break; 2899 case 0x2: 2900 result = HSO_PORT_GPS; 2901 break; 2902 case 0x3: 2903 result = HSO_PORT_GPS_CONTROL; 2904 break; 2905 case 0x4: 2906 result = HSO_PORT_APP; 2907 break; 2908 case 0x5: 2909 result = HSO_PORT_APP2; 2910 break; 2911 case 0x6: 2912 result = HSO_PORT_CONTROL; 2913 break; 2914 case 0x7: 2915 result = HSO_PORT_NETWORK; 2916 break; 2917 case 0x8: 2918 result = HSO_PORT_MODEM; 2919 break; 2920 case 0x9: 2921 result = HSO_PORT_MSD; 2922 break; 2923 case 0xa: 2924 result = HSO_PORT_PCSC; 2925 break; 2926 case 0xb: 2927 result = HSO_PORT_VOICE; 2928 break; 2929 default: 2930 result = 0; 2931 } 2932 2933 if (result) 2934 result |= HSO_INTF_BULK; 2935 2936 if (config_data[16] & 0x1) 2937 result |= HSO_INFO_CRC_BUG; 2938 2939 return result; 2940 } 2941 2942 /* called once for each interface upon device insertion */ 2943 static int hso_probe(struct usb_interface *interface, 2944 const struct usb_device_id *id) 2945 { 2946 int mux, i, if_num, port_spec; 2947 unsigned char port_mask; 2948 struct hso_device *hso_dev = NULL; 2949 struct hso_shared_int *shared_int; 2950 struct hso_device *tmp_dev = NULL; 2951 2952 if_num = interface->altsetting->desc.bInterfaceNumber; 2953 2954 /* Get the interface/port specification from either driver_info or from 2955 * the device itself */ 2956 if (id->driver_info) 2957 port_spec = ((u32 *)(id->driver_info))[if_num]; 2958 else 2959 port_spec = hso_get_config_data(interface); 2960 2961 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2962 dev_err(&interface->dev, "Not our interface\n"); 2963 return -ENODEV; 2964 } 2965 /* Check if we need to switch to alt interfaces prior to port 2966 * configuration */ 2967 if (interface->num_altsetting > 1) 2968 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2969 interface->needs_remote_wakeup = 1; 2970 2971 /* Allocate new hso device(s) */ 2972 switch (port_spec & HSO_INTF_MASK) { 2973 case HSO_INTF_MUX: 2974 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2975 /* Create the network device */ 2976 if (!disable_net) { 2977 hso_dev = hso_create_net_device(interface, 2978 port_spec); 2979 if (!hso_dev) 2980 goto exit; 2981 tmp_dev = hso_dev; 2982 } 2983 } 2984 2985 if (hso_get_mux_ports(interface, &port_mask)) 2986 /* TODO: de-allocate everything */ 2987 goto exit; 2988 2989 shared_int = hso_create_shared_int(interface); 2990 if (!shared_int) 2991 goto exit; 2992 2993 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2994 if (port_mask & i) { 2995 hso_dev = hso_create_mux_serial_device( 2996 interface, i, shared_int); 2997 if (!hso_dev) 2998 goto exit; 2999 } 3000 } 3001 3002 if (tmp_dev) 3003 hso_dev = tmp_dev; 3004 break; 3005 3006 case HSO_INTF_BULK: 3007 /* It's a regular bulk interface */ 3008 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 3009 !disable_net) 3010 hso_dev = hso_create_net_device(interface, port_spec); 3011 else 3012 hso_dev = 3013 hso_create_bulk_serial_device(interface, port_spec); 3014 if (!hso_dev) 3015 goto exit; 3016 break; 3017 default: 3018 goto exit; 3019 } 3020 3021 /* save our data pointer in this device */ 3022 usb_set_intfdata(interface, hso_dev); 3023 3024 /* done */ 3025 return 0; 3026 exit: 3027 hso_free_interface(interface); 3028 return -ENODEV; 3029 } 3030 3031 /* device removed, cleaning up */ 3032 static void hso_disconnect(struct usb_interface *interface) 3033 { 3034 hso_free_interface(interface); 3035 3036 /* remove reference of our private data */ 3037 usb_set_intfdata(interface, NULL); 3038 } 3039 3040 static void async_get_intf(struct work_struct *data) 3041 { 3042 struct hso_device *hso_dev = 3043 container_of(data, struct hso_device, async_get_intf); 3044 usb_autopm_get_interface(hso_dev->interface); 3045 } 3046 3047 static void async_put_intf(struct work_struct *data) 3048 { 3049 struct hso_device *hso_dev = 3050 container_of(data, struct hso_device, async_put_intf); 3051 usb_autopm_put_interface(hso_dev->interface); 3052 } 3053 3054 static int hso_get_activity(struct hso_device *hso_dev) 3055 { 3056 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3057 if (!hso_dev->is_active) { 3058 hso_dev->is_active = 1; 3059 schedule_work(&hso_dev->async_get_intf); 3060 } 3061 } 3062 3063 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3064 return -EAGAIN; 3065 3066 usb_mark_last_busy(hso_dev->usb); 3067 3068 return 0; 3069 } 3070 3071 static int hso_put_activity(struct hso_device *hso_dev) 3072 { 3073 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3074 if (hso_dev->is_active) { 3075 hso_dev->is_active = 0; 3076 schedule_work(&hso_dev->async_put_intf); 3077 return -EAGAIN; 3078 } 3079 } 3080 hso_dev->is_active = 0; 3081 return 0; 3082 } 3083 3084 /* called by kernel when we need to suspend device */ 3085 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3086 { 3087 int i, result; 3088 3089 /* Stop all serial ports */ 3090 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3091 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3092 result = hso_stop_serial_device(serial_table[i]); 3093 if (result) 3094 goto out; 3095 } 3096 } 3097 3098 /* Stop all network ports */ 3099 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3100 if (network_table[i] && 3101 (network_table[i]->interface == iface)) { 3102 result = hso_stop_net_device(network_table[i]); 3103 if (result) 3104 goto out; 3105 } 3106 } 3107 3108 out: 3109 return 0; 3110 } 3111 3112 /* called by kernel when we need to resume device */ 3113 static int hso_resume(struct usb_interface *iface) 3114 { 3115 int i, result = 0; 3116 struct hso_net *hso_net; 3117 3118 /* Start all serial ports */ 3119 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3120 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3121 if (dev2ser(serial_table[i])->open_count) { 3122 result = 3123 hso_start_serial_device(serial_table[i], GFP_NOIO); 3124 hso_kick_transmit(dev2ser(serial_table[i])); 3125 if (result) 3126 goto out; 3127 } 3128 } 3129 } 3130 3131 /* Start all network ports */ 3132 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3133 if (network_table[i] && 3134 (network_table[i]->interface == iface)) { 3135 hso_net = dev2net(network_table[i]); 3136 if (hso_net->flags & IFF_UP) { 3137 /* First transmit any lingering data, 3138 then restart the device. */ 3139 if (hso_net->skb_tx_buf) { 3140 dev_dbg(&iface->dev, 3141 "Transmitting" 3142 " lingering data\n"); 3143 hso_net_start_xmit(hso_net->skb_tx_buf, 3144 hso_net->net); 3145 hso_net->skb_tx_buf = NULL; 3146 } 3147 result = hso_start_net_device(network_table[i]); 3148 if (result) 3149 goto out; 3150 } 3151 } 3152 } 3153 3154 out: 3155 return result; 3156 } 3157 3158 static void reset_device(struct work_struct *data) 3159 { 3160 struct hso_device *hso_dev = 3161 container_of(data, struct hso_device, reset_device); 3162 struct usb_device *usb = hso_dev->usb; 3163 int result; 3164 3165 if (hso_dev->usb_gone) { 3166 D1("No reset during disconnect\n"); 3167 } else { 3168 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3169 if (result < 0) 3170 D1("unable to lock device for reset: %d\n", result); 3171 else { 3172 usb_reset_device(usb); 3173 usb_unlock_device(usb); 3174 } 3175 } 3176 } 3177 3178 static void hso_serial_ref_free(struct kref *ref) 3179 { 3180 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3181 3182 hso_free_serial_device(hso_dev); 3183 } 3184 3185 static void hso_free_interface(struct usb_interface *interface) 3186 { 3187 struct hso_serial *hso_dev; 3188 struct tty_struct *tty; 3189 int i; 3190 3191 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3192 if (serial_table[i] && 3193 (serial_table[i]->interface == interface)) { 3194 hso_dev = dev2ser(serial_table[i]); 3195 spin_lock_irq(&hso_dev->serial_lock); 3196 tty = tty_kref_get(hso_dev->tty); 3197 spin_unlock_irq(&hso_dev->serial_lock); 3198 if (tty) 3199 tty_hangup(tty); 3200 mutex_lock(&hso_dev->parent->mutex); 3201 tty_kref_put(tty); 3202 hso_dev->parent->usb_gone = 1; 3203 mutex_unlock(&hso_dev->parent->mutex); 3204 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3205 } 3206 } 3207 3208 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3209 if (network_table[i] && 3210 (network_table[i]->interface == interface)) { 3211 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3212 /* hso_stop_net_device doesn't stop the net queue since 3213 * traffic needs to start it again when suspended */ 3214 netif_stop_queue(dev2net(network_table[i])->net); 3215 hso_stop_net_device(network_table[i]); 3216 cancel_work_sync(&network_table[i]->async_put_intf); 3217 cancel_work_sync(&network_table[i]->async_get_intf); 3218 if (rfk) { 3219 rfkill_unregister(rfk); 3220 rfkill_destroy(rfk); 3221 } 3222 hso_free_net_device(network_table[i]); 3223 } 3224 } 3225 } 3226 3227 /* Helper functions */ 3228 3229 /* Get the endpoint ! */ 3230 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3231 int type, int dir) 3232 { 3233 int i; 3234 struct usb_host_interface *iface = intf->cur_altsetting; 3235 struct usb_endpoint_descriptor *endp; 3236 3237 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3238 endp = &iface->endpoint[i].desc; 3239 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3240 (usb_endpoint_type(endp) == type)) 3241 return endp; 3242 } 3243 3244 return NULL; 3245 } 3246 3247 /* Get the byte that describes which ports are enabled */ 3248 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3249 { 3250 int i; 3251 struct usb_host_interface *iface = intf->cur_altsetting; 3252 3253 if (iface->extralen == 3) { 3254 *ports = iface->extra[2]; 3255 return 0; 3256 } 3257 3258 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3259 if (iface->endpoint[i].extralen == 3) { 3260 *ports = iface->endpoint[i].extra[2]; 3261 return 0; 3262 } 3263 } 3264 3265 return -1; 3266 } 3267 3268 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3269 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3270 struct usb_device *usb, gfp_t gfp) 3271 { 3272 int result; 3273 3274 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3275 usb_rcvintpipe(usb, 3276 shared_int->intr_endp->bEndpointAddress & 0x7F), 3277 shared_int->shared_intr_buf, 3278 1, 3279 intr_callback, shared_int, 3280 shared_int->intr_endp->bInterval); 3281 3282 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3283 if (result) 3284 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3285 result); 3286 3287 return result; 3288 } 3289 3290 /* operations setup of the serial interface */ 3291 static const struct tty_operations hso_serial_ops = { 3292 .open = hso_serial_open, 3293 .close = hso_serial_close, 3294 .write = hso_serial_write, 3295 .write_room = hso_serial_write_room, 3296 .ioctl = hso_serial_ioctl, 3297 .set_termios = hso_serial_set_termios, 3298 .chars_in_buffer = hso_serial_chars_in_buffer, 3299 .tiocmget = hso_serial_tiocmget, 3300 .tiocmset = hso_serial_tiocmset, 3301 .unthrottle = hso_unthrottle 3302 }; 3303 3304 static struct usb_driver hso_driver = { 3305 .name = driver_name, 3306 .probe = hso_probe, 3307 .disconnect = hso_disconnect, 3308 .id_table = hso_ids, 3309 .suspend = hso_suspend, 3310 .resume = hso_resume, 3311 .reset_resume = hso_resume, 3312 .supports_autosuspend = 1, 3313 }; 3314 3315 static int __init hso_init(void) 3316 { 3317 int i; 3318 int result; 3319 3320 /* put it in the log */ 3321 printk(KERN_INFO "hso: %s\n", version); 3322 3323 /* Initialise the serial table semaphore and table */ 3324 spin_lock_init(&serial_table_lock); 3325 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3326 serial_table[i] = NULL; 3327 3328 /* allocate our driver using the proper amount of supported minors */ 3329 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3330 if (!tty_drv) 3331 return -ENOMEM; 3332 3333 /* fill in all needed values */ 3334 tty_drv->magic = TTY_DRIVER_MAGIC; 3335 tty_drv->owner = THIS_MODULE; 3336 tty_drv->driver_name = driver_name; 3337 tty_drv->name = tty_filename; 3338 3339 /* if major number is provided as parameter, use that one */ 3340 if (tty_major) 3341 tty_drv->major = tty_major; 3342 3343 tty_drv->minor_start = 0; 3344 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3345 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3346 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3347 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3348 tty_drv->init_termios = tty_std_termios; 3349 hso_init_termios(&tty_drv->init_termios); 3350 tty_set_operations(tty_drv, &hso_serial_ops); 3351 3352 /* register the tty driver */ 3353 result = tty_register_driver(tty_drv); 3354 if (result) { 3355 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3356 __func__, result); 3357 return result; 3358 } 3359 3360 /* register this module as an usb driver */ 3361 result = usb_register(&hso_driver); 3362 if (result) { 3363 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3364 result); 3365 /* cleanup serial interface */ 3366 tty_unregister_driver(tty_drv); 3367 return result; 3368 } 3369 3370 /* done */ 3371 return 0; 3372 } 3373 3374 static void __exit hso_exit(void) 3375 { 3376 printk(KERN_INFO "hso: unloaded\n"); 3377 3378 tty_unregister_driver(tty_drv); 3379 /* deregister the usb driver */ 3380 usb_deregister(&hso_driver); 3381 } 3382 3383 /* Module definitions */ 3384 module_init(hso_init); 3385 module_exit(hso_exit); 3386 3387 MODULE_AUTHOR(MOD_AUTHOR); 3388 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3389 MODULE_LICENSE(MOD_LICENSE); 3390 3391 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3392 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3393 module_param(debug, int, S_IRUGO | S_IWUSR); 3394 3395 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3396 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3397 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3398 3399 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3400 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3401 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3402