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