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__, 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->driver_data; 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 int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) 775 { 776 struct hso_net *odev = netdev_priv(net); 777 int result; 778 779 /* Tell the kernel, "No more frames 'til we are done with this one." */ 780 netif_stop_queue(net); 781 if (hso_get_activity(odev->parent) == -EAGAIN) { 782 odev->skb_tx_buf = skb; 783 return 0; 784 } 785 786 /* log if asked */ 787 DUMP1(skb->data, skb->len); 788 /* Copy it from kernel memory to OUR memory */ 789 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 790 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 791 792 /* Fill in the URB for shipping it out. */ 793 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 794 odev->parent->usb, 795 usb_sndbulkpipe(odev->parent->usb, 796 odev->out_endp-> 797 bEndpointAddress & 0x7F), 798 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 799 odev); 800 801 /* Deal with the Zero Length packet problem, I hope */ 802 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 803 804 /* Send the URB on its merry way. */ 805 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 806 if (result) { 807 dev_warn(&odev->parent->interface->dev, 808 "failed mux_bulk_tx_urb %d", result); 809 net->stats.tx_errors++; 810 netif_start_queue(net); 811 } else { 812 net->stats.tx_packets++; 813 net->stats.tx_bytes += skb->len; 814 /* And tell the kernel when the last transmit started. */ 815 net->trans_start = jiffies; 816 } 817 dev_kfree_skb(skb); 818 /* we're done */ 819 return result; 820 } 821 822 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 823 { 824 struct hso_net *odev = netdev_priv(net); 825 826 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 827 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 828 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 829 } 830 831 static struct ethtool_ops ops = { 832 .get_drvinfo = hso_get_drvinfo, 833 .get_link = ethtool_op_get_link 834 }; 835 836 /* called when a packet did not ack after watchdogtimeout */ 837 static void hso_net_tx_timeout(struct net_device *net) 838 { 839 struct hso_net *odev = netdev_priv(net); 840 841 if (!odev) 842 return; 843 844 /* Tell syslog we are hosed. */ 845 dev_warn(&net->dev, "Tx timed out.\n"); 846 847 /* Tear the waiting frame off the list */ 848 if (odev->mux_bulk_tx_urb 849 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 850 usb_unlink_urb(odev->mux_bulk_tx_urb); 851 852 /* Update statistics */ 853 net->stats.tx_errors++; 854 } 855 856 /* make a real packet from the received USB buffer */ 857 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 858 unsigned int count, unsigned char is_eop) 859 { 860 unsigned short temp_bytes; 861 unsigned short buffer_offset = 0; 862 unsigned short frame_len; 863 unsigned char *tmp_rx_buf; 864 865 /* log if needed */ 866 D1("Rx %d bytes", count); 867 DUMP(ip_pkt, min(128, (int)count)); 868 869 while (count) { 870 switch (odev->rx_parse_state) { 871 case WAIT_IP: 872 /* waiting for IP header. */ 873 /* wanted bytes - size of ip header */ 874 temp_bytes = 875 (count < 876 odev->rx_buf_missing) ? count : odev-> 877 rx_buf_missing; 878 879 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 880 odev->rx_buf_size, ip_pkt + buffer_offset, 881 temp_bytes); 882 883 odev->rx_buf_size += temp_bytes; 884 buffer_offset += temp_bytes; 885 odev->rx_buf_missing -= temp_bytes; 886 count -= temp_bytes; 887 888 if (!odev->rx_buf_missing) { 889 /* header is complete allocate an sk_buffer and 890 * continue to WAIT_DATA */ 891 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 892 893 if ((frame_len > DEFAULT_MRU) || 894 (frame_len < sizeof(struct iphdr))) { 895 dev_err(&odev->net->dev, 896 "Invalid frame (%d) length\n", 897 frame_len); 898 odev->rx_parse_state = WAIT_SYNC; 899 continue; 900 } 901 /* Allocate an sk_buff */ 902 odev->skb_rx_buf = dev_alloc_skb(frame_len); 903 if (!odev->skb_rx_buf) { 904 /* We got no receive buffer. */ 905 D1("could not allocate memory"); 906 odev->rx_parse_state = WAIT_SYNC; 907 return; 908 } 909 /* Here's where it came from */ 910 odev->skb_rx_buf->dev = odev->net; 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 kref_put(&serial->parent->ref, hso_serial_ref_free); 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 1388 /* close the requested serial port */ 1389 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1390 int count) 1391 { 1392 struct hso_serial *serial = get_serial_by_tty(tty); 1393 int space, tx_bytes; 1394 unsigned long flags; 1395 1396 /* sanity check */ 1397 if (serial == NULL) { 1398 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1399 return -ENODEV; 1400 } 1401 1402 spin_lock_irqsave(&serial->serial_lock, flags); 1403 1404 space = serial->tx_data_length - serial->tx_buffer_count; 1405 tx_bytes = (count < space) ? count : space; 1406 1407 if (!tx_bytes) 1408 goto out; 1409 1410 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1411 serial->tx_buffer_count += tx_bytes; 1412 1413 out: 1414 spin_unlock_irqrestore(&serial->serial_lock, flags); 1415 1416 hso_kick_transmit(serial); 1417 /* done */ 1418 return tx_bytes; 1419 } 1420 1421 /* how much room is there for writing */ 1422 static int hso_serial_write_room(struct tty_struct *tty) 1423 { 1424 struct hso_serial *serial = get_serial_by_tty(tty); 1425 int room; 1426 unsigned long flags; 1427 1428 spin_lock_irqsave(&serial->serial_lock, flags); 1429 room = serial->tx_data_length - serial->tx_buffer_count; 1430 spin_unlock_irqrestore(&serial->serial_lock, flags); 1431 1432 /* return free room */ 1433 return room; 1434 } 1435 1436 /* setup the term */ 1437 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1438 { 1439 struct hso_serial *serial = get_serial_by_tty(tty); 1440 unsigned long flags; 1441 1442 if (old) 1443 D5("Termios called with: cflags new[%d] - old[%d]", 1444 tty->termios->c_cflag, old->c_cflag); 1445 1446 /* the actual setup */ 1447 spin_lock_irqsave(&serial->serial_lock, flags); 1448 if (serial->open_count) 1449 _hso_serial_set_termios(tty, old); 1450 else 1451 tty->termios = old; 1452 spin_unlock_irqrestore(&serial->serial_lock, flags); 1453 1454 /* done */ 1455 return; 1456 } 1457 1458 /* how many characters in the buffer */ 1459 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1460 { 1461 struct hso_serial *serial = get_serial_by_tty(tty); 1462 int chars; 1463 unsigned long flags; 1464 1465 /* sanity check */ 1466 if (serial == NULL) 1467 return 0; 1468 1469 spin_lock_irqsave(&serial->serial_lock, flags); 1470 chars = serial->tx_buffer_count; 1471 spin_unlock_irqrestore(&serial->serial_lock, flags); 1472 1473 return chars; 1474 } 1475 static int tiocmget_submit_urb(struct hso_serial *serial, 1476 struct hso_tiocmget *tiocmget, 1477 struct usb_device *usb) 1478 { 1479 int result; 1480 1481 if (serial->parent->usb_gone) 1482 return -ENODEV; 1483 usb_fill_int_urb(tiocmget->urb, usb, 1484 usb_rcvintpipe(usb, 1485 tiocmget->endp-> 1486 bEndpointAddress & 0x7F), 1487 &tiocmget->serial_state_notification, 1488 sizeof(struct hso_serial_state_notification), 1489 tiocmget_intr_callback, serial, 1490 tiocmget->endp->bInterval); 1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1492 if (result) { 1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1494 result); 1495 } 1496 return result; 1497 1498 } 1499 1500 static void tiocmget_intr_callback(struct urb *urb) 1501 { 1502 struct hso_serial *serial = urb->context; 1503 struct hso_tiocmget *tiocmget; 1504 int status = urb->status; 1505 u16 UART_state_bitmap, prev_UART_state_bitmap; 1506 struct uart_icount *icount; 1507 struct hso_serial_state_notification *serial_state_notification; 1508 struct usb_device *usb; 1509 1510 /* Sanity checks */ 1511 if (!serial) 1512 return; 1513 if (status) { 1514 log_usb_status(status, __func__); 1515 return; 1516 } 1517 tiocmget = serial->tiocmget; 1518 if (!tiocmget) 1519 return; 1520 usb = serial->parent->usb; 1521 serial_state_notification = &tiocmget->serial_state_notification; 1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1523 serial_state_notification->bNotification != B_NOTIFICATION || 1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1527 dev_warn(&usb->dev, 1528 "hso received invalid serial state notification\n"); 1529 DUMP(serial_state_notification, 1530 sizeof(hso_serial_state_notifation)) 1531 } else { 1532 1533 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1534 UART_state_bitmap); 1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1536 icount = &tiocmget->icount; 1537 spin_lock(&serial->serial_lock); 1538 if ((UART_state_bitmap & B_OVERRUN) != 1539 (prev_UART_state_bitmap & B_OVERRUN)) 1540 icount->parity++; 1541 if ((UART_state_bitmap & B_PARITY) != 1542 (prev_UART_state_bitmap & B_PARITY)) 1543 icount->parity++; 1544 if ((UART_state_bitmap & B_FRAMING) != 1545 (prev_UART_state_bitmap & B_FRAMING)) 1546 icount->frame++; 1547 if ((UART_state_bitmap & B_RING_SIGNAL) && 1548 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1549 icount->rng++; 1550 if ((UART_state_bitmap & B_BREAK) != 1551 (prev_UART_state_bitmap & B_BREAK)) 1552 icount->brk++; 1553 if ((UART_state_bitmap & B_TX_CARRIER) != 1554 (prev_UART_state_bitmap & B_TX_CARRIER)) 1555 icount->dsr++; 1556 if ((UART_state_bitmap & B_RX_CARRIER) != 1557 (prev_UART_state_bitmap & B_RX_CARRIER)) 1558 icount->dcd++; 1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1560 spin_unlock(&serial->serial_lock); 1561 tiocmget->intr_completed = 1; 1562 wake_up_interruptible(&tiocmget->waitq); 1563 } 1564 memset(serial_state_notification, 0, 1565 sizeof(struct hso_serial_state_notification)); 1566 tiocmget_submit_urb(serial, 1567 tiocmget, 1568 serial->parent->usb); 1569 } 1570 1571 /* 1572 * next few functions largely stolen from drivers/serial/serial_core.c 1573 */ 1574 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1575 * - mask passed in arg for lines of interest 1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1577 * Caller should use TIOCGICOUNT to see which one it was 1578 */ 1579 static int 1580 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1581 { 1582 DECLARE_WAITQUEUE(wait, current); 1583 struct uart_icount cprev, cnow; 1584 struct hso_tiocmget *tiocmget; 1585 int ret; 1586 1587 tiocmget = serial->tiocmget; 1588 if (!tiocmget) 1589 return -ENOENT; 1590 /* 1591 * note the counters on entry 1592 */ 1593 spin_lock_irq(&serial->serial_lock); 1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1595 spin_unlock_irq(&serial->serial_lock); 1596 add_wait_queue(&tiocmget->waitq, &wait); 1597 for (;;) { 1598 spin_lock_irq(&serial->serial_lock); 1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1600 spin_unlock_irq(&serial->serial_lock); 1601 set_current_state(TASK_INTERRUPTIBLE); 1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1605 ret = 0; 1606 break; 1607 } 1608 schedule(); 1609 /* see if a signal did it */ 1610 if (signal_pending(current)) { 1611 ret = -ERESTARTSYS; 1612 break; 1613 } 1614 cprev = cnow; 1615 } 1616 current->state = TASK_RUNNING; 1617 remove_wait_queue(&tiocmget->waitq, &wait); 1618 1619 return ret; 1620 } 1621 1622 /* 1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1624 * Return: write counters to the user passed counter struct 1625 * NB: both 1->0 and 0->1 transitions are counted except for 1626 * RI where only 0->1 is counted. 1627 */ 1628 static int hso_get_count(struct hso_serial *serial, 1629 struct serial_icounter_struct __user *icnt) 1630 { 1631 struct serial_icounter_struct icount; 1632 struct uart_icount cnow; 1633 struct hso_tiocmget *tiocmget = serial->tiocmget; 1634 1635 if (!tiocmget) 1636 return -ENOENT; 1637 spin_lock_irq(&serial->serial_lock); 1638 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1639 spin_unlock_irq(&serial->serial_lock); 1640 1641 icount.cts = cnow.cts; 1642 icount.dsr = cnow.dsr; 1643 icount.rng = cnow.rng; 1644 icount.dcd = cnow.dcd; 1645 icount.rx = cnow.rx; 1646 icount.tx = cnow.tx; 1647 icount.frame = cnow.frame; 1648 icount.overrun = cnow.overrun; 1649 icount.parity = cnow.parity; 1650 icount.brk = cnow.brk; 1651 icount.buf_overrun = cnow.buf_overrun; 1652 1653 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1654 } 1655 1656 1657 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1658 { 1659 int retval; 1660 struct hso_serial *serial = get_serial_by_tty(tty); 1661 struct hso_tiocmget *tiocmget; 1662 u16 UART_state_bitmap; 1663 1664 /* sanity check */ 1665 if (!serial) { 1666 D1("no tty structures"); 1667 return -EINVAL; 1668 } 1669 spin_lock_irq(&serial->serial_lock); 1670 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1671 ((serial->dtr_state) ? TIOCM_DTR : 0); 1672 tiocmget = serial->tiocmget; 1673 if (tiocmget) { 1674 1675 UART_state_bitmap = le16_to_cpu( 1676 tiocmget->prev_UART_state_bitmap); 1677 if (UART_state_bitmap & B_RING_SIGNAL) 1678 retval |= TIOCM_RNG; 1679 if (UART_state_bitmap & B_RX_CARRIER) 1680 retval |= TIOCM_CD; 1681 if (UART_state_bitmap & B_TX_CARRIER) 1682 retval |= TIOCM_DSR; 1683 } 1684 spin_unlock_irq(&serial->serial_lock); 1685 return retval; 1686 } 1687 1688 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1689 unsigned int set, unsigned int clear) 1690 { 1691 int val = 0; 1692 unsigned long flags; 1693 int if_num; 1694 struct hso_serial *serial = get_serial_by_tty(tty); 1695 1696 /* sanity check */ 1697 if (!serial) { 1698 D1("no tty structures"); 1699 return -EINVAL; 1700 } 1701 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1702 1703 spin_lock_irqsave(&serial->serial_lock, flags); 1704 if (set & TIOCM_RTS) 1705 serial->rts_state = 1; 1706 if (set & TIOCM_DTR) 1707 serial->dtr_state = 1; 1708 1709 if (clear & TIOCM_RTS) 1710 serial->rts_state = 0; 1711 if (clear & TIOCM_DTR) 1712 serial->dtr_state = 0; 1713 1714 if (serial->dtr_state) 1715 val |= 0x01; 1716 if (serial->rts_state) 1717 val |= 0x02; 1718 1719 spin_unlock_irqrestore(&serial->serial_lock, flags); 1720 1721 return usb_control_msg(serial->parent->usb, 1722 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1723 0x21, val, if_num, NULL, 0, 1724 USB_CTRL_SET_TIMEOUT); 1725 } 1726 1727 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1728 unsigned int cmd, unsigned long arg) 1729 { 1730 struct hso_serial *serial = get_serial_by_tty(tty); 1731 void __user *uarg = (void __user *)arg; 1732 int ret = 0; 1733 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1734 1735 if (!serial) 1736 return -ENODEV; 1737 switch (cmd) { 1738 case TIOCMIWAIT: 1739 ret = hso_wait_modem_status(serial, arg); 1740 break; 1741 1742 case TIOCGICOUNT: 1743 ret = hso_get_count(serial, uarg); 1744 break; 1745 default: 1746 ret = -ENOIOCTLCMD; 1747 break; 1748 } 1749 return ret; 1750 } 1751 1752 1753 /* starts a transmit */ 1754 static void hso_kick_transmit(struct hso_serial *serial) 1755 { 1756 u8 *temp; 1757 unsigned long flags; 1758 int res; 1759 1760 spin_lock_irqsave(&serial->serial_lock, flags); 1761 if (!serial->tx_buffer_count) 1762 goto out; 1763 1764 if (serial->tx_urb_used) 1765 goto out; 1766 1767 /* Wakeup USB interface if necessary */ 1768 if (hso_get_activity(serial->parent) == -EAGAIN) 1769 goto out; 1770 1771 /* Switch pointers around to avoid memcpy */ 1772 temp = serial->tx_buffer; 1773 serial->tx_buffer = serial->tx_data; 1774 serial->tx_data = temp; 1775 serial->tx_data_count = serial->tx_buffer_count; 1776 serial->tx_buffer_count = 0; 1777 1778 /* If temp is set, it means we switched buffers */ 1779 if (temp && serial->write_data) { 1780 res = serial->write_data(serial); 1781 if (res >= 0) 1782 serial->tx_urb_used = 1; 1783 } 1784 out: 1785 spin_unlock_irqrestore(&serial->serial_lock, flags); 1786 } 1787 1788 /* make a request (for reading and writing data to muxed serial port) */ 1789 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1790 struct urb *ctrl_urb, 1791 struct usb_ctrlrequest *ctrl_req, 1792 u8 *ctrl_urb_data, u32 size) 1793 { 1794 int result; 1795 int pipe; 1796 1797 /* Sanity check */ 1798 if (!serial || !ctrl_urb || !ctrl_req) { 1799 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1800 return -EINVAL; 1801 } 1802 1803 /* initialize */ 1804 ctrl_req->wValue = 0; 1805 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1806 ctrl_req->wLength = cpu_to_le16(size); 1807 1808 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1809 /* Reading command */ 1810 ctrl_req->bRequestType = USB_DIR_IN | 1811 USB_TYPE_OPTION_VENDOR | 1812 USB_RECIP_INTERFACE; 1813 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1814 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1815 } else { 1816 /* Writing command */ 1817 ctrl_req->bRequestType = USB_DIR_OUT | 1818 USB_TYPE_OPTION_VENDOR | 1819 USB_RECIP_INTERFACE; 1820 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1821 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1822 } 1823 /* syslog */ 1824 D2("%s command (%02x) len: %d, port: %d", 1825 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1826 ctrl_req->bRequestType, ctrl_req->wLength, port); 1827 1828 /* Load ctrl urb */ 1829 ctrl_urb->transfer_flags = 0; 1830 usb_fill_control_urb(ctrl_urb, 1831 serial->parent->usb, 1832 pipe, 1833 (u8 *) ctrl_req, 1834 ctrl_urb_data, size, ctrl_callback, serial); 1835 /* Send it on merry way */ 1836 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1837 if (result) { 1838 dev_err(&ctrl_urb->dev->dev, 1839 "%s failed submit ctrl_urb %d type %d", __func__, 1840 result, type); 1841 return result; 1842 } 1843 1844 /* done */ 1845 return size; 1846 } 1847 1848 /* called by intr_callback when read occurs */ 1849 static int hso_mux_serial_read(struct hso_serial *serial) 1850 { 1851 if (!serial) 1852 return -EINVAL; 1853 1854 /* clean data */ 1855 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1856 /* make the request */ 1857 1858 if (serial->num_rx_urbs != 1) { 1859 dev_err(&serial->parent->interface->dev, 1860 "ERROR: mux'd reads with multiple buffers " 1861 "not possible\n"); 1862 return 0; 1863 } 1864 return mux_device_request(serial, 1865 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1866 serial->parent->port_spec & HSO_PORT_MASK, 1867 serial->rx_urb[0], 1868 &serial->ctrl_req_rx, 1869 serial->rx_data[0], serial->rx_data_length); 1870 } 1871 1872 /* used for muxed serial port callback (muxed serial read) */ 1873 static void intr_callback(struct urb *urb) 1874 { 1875 struct hso_shared_int *shared_int = urb->context; 1876 struct hso_serial *serial; 1877 unsigned char *port_req; 1878 int status = urb->status; 1879 int i; 1880 1881 usb_mark_last_busy(urb->dev); 1882 1883 /* sanity check */ 1884 if (!shared_int) 1885 return; 1886 1887 /* status check */ 1888 if (status) { 1889 log_usb_status(status, __func__); 1890 return; 1891 } 1892 D4("\n--- Got intr callback 0x%02X ---", status); 1893 1894 /* what request? */ 1895 port_req = urb->transfer_buffer; 1896 D4(" port_req = 0x%.2X\n", *port_req); 1897 /* loop over all muxed ports to find the one sending this */ 1898 for (i = 0; i < 8; i++) { 1899 /* max 8 channels on MUX */ 1900 if (*port_req & (1 << i)) { 1901 serial = get_serial_by_shared_int_and_type(shared_int, 1902 (1 << i)); 1903 if (serial != NULL) { 1904 D1("Pending read interrupt on port %d\n", i); 1905 spin_lock(&serial->serial_lock); 1906 if (serial->rx_state == RX_IDLE) { 1907 /* Setup and send a ctrl req read on 1908 * port i */ 1909 if (!serial->rx_urb_filled[0]) { 1910 serial->rx_state = RX_SENT; 1911 hso_mux_serial_read(serial); 1912 } else 1913 serial->rx_state = RX_PENDING; 1914 1915 } else { 1916 D1("Already pending a read on " 1917 "port %d\n", i); 1918 } 1919 spin_unlock(&serial->serial_lock); 1920 } 1921 } 1922 } 1923 /* Resubmit interrupt urb */ 1924 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1925 } 1926 1927 /* called for writing to muxed serial port */ 1928 static int hso_mux_serial_write_data(struct hso_serial *serial) 1929 { 1930 if (NULL == serial) 1931 return -EINVAL; 1932 1933 return mux_device_request(serial, 1934 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1935 serial->parent->port_spec & HSO_PORT_MASK, 1936 serial->tx_urb, 1937 &serial->ctrl_req_tx, 1938 serial->tx_data, serial->tx_data_count); 1939 } 1940 1941 /* write callback for Diag and CS port */ 1942 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1943 { 1944 struct hso_serial *serial = urb->context; 1945 int status = urb->status; 1946 struct tty_struct *tty; 1947 1948 /* sanity check */ 1949 if (!serial) { 1950 D1("serial == NULL"); 1951 return; 1952 } 1953 1954 spin_lock(&serial->serial_lock); 1955 serial->tx_urb_used = 0; 1956 tty = tty_kref_get(serial->tty); 1957 spin_unlock(&serial->serial_lock); 1958 if (status) { 1959 log_usb_status(status, __func__); 1960 tty_kref_put(tty); 1961 return; 1962 } 1963 hso_put_activity(serial->parent); 1964 if (tty) { 1965 tty_wakeup(tty); 1966 tty_kref_put(tty); 1967 } 1968 hso_kick_transmit(serial); 1969 1970 D1(" "); 1971 return; 1972 } 1973 1974 /* called for writing diag or CS serial port */ 1975 static int hso_std_serial_write_data(struct hso_serial *serial) 1976 { 1977 int count = serial->tx_data_count; 1978 int result; 1979 1980 usb_fill_bulk_urb(serial->tx_urb, 1981 serial->parent->usb, 1982 usb_sndbulkpipe(serial->parent->usb, 1983 serial->out_endp-> 1984 bEndpointAddress & 0x7F), 1985 serial->tx_data, serial->tx_data_count, 1986 hso_std_serial_write_bulk_callback, serial); 1987 1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1989 if (result) { 1990 dev_warn(&serial->parent->usb->dev, 1991 "Failed to submit urb - res %d\n", result); 1992 return result; 1993 } 1994 1995 return count; 1996 } 1997 1998 /* callback after read or write on muxed serial port */ 1999 static void ctrl_callback(struct urb *urb) 2000 { 2001 struct hso_serial *serial = urb->context; 2002 struct usb_ctrlrequest *req; 2003 int status = urb->status; 2004 struct tty_struct *tty; 2005 2006 /* sanity check */ 2007 if (!serial) 2008 return; 2009 2010 spin_lock(&serial->serial_lock); 2011 serial->tx_urb_used = 0; 2012 tty = tty_kref_get(serial->tty); 2013 spin_unlock(&serial->serial_lock); 2014 if (status) { 2015 log_usb_status(status, __func__); 2016 tty_kref_put(tty); 2017 return; 2018 } 2019 2020 /* what request? */ 2021 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2023 D4("Actual length of urb = %d\n", urb->actual_length); 2024 DUMP1(urb->transfer_buffer, urb->actual_length); 2025 2026 if (req->bRequestType == 2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2028 /* response to a read command */ 2029 serial->rx_urb_filled[0] = 1; 2030 spin_lock(&serial->serial_lock); 2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2032 spin_unlock(&serial->serial_lock); 2033 } else { 2034 hso_put_activity(serial->parent); 2035 if (tty) 2036 tty_wakeup(tty); 2037 /* response to a write command */ 2038 hso_kick_transmit(serial); 2039 } 2040 tty_kref_put(tty); 2041 } 2042 2043 /* handle RX data for serial port */ 2044 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2045 { 2046 struct tty_struct *tty; 2047 int write_length_remaining = 0; 2048 int curr_write_len; 2049 2050 /* Sanity check */ 2051 if (urb == NULL || serial == NULL) { 2052 D1("serial = NULL"); 2053 return -2; 2054 } 2055 2056 /* All callers to put_rxbuf_data hold serial_lock */ 2057 tty = tty_kref_get(serial->tty); 2058 2059 /* Push data to tty */ 2060 if (tty) { 2061 write_length_remaining = urb->actual_length - 2062 serial->curr_rx_urb_offset; 2063 D1("data to push to tty"); 2064 while (write_length_remaining) { 2065 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2066 tty_kref_put(tty); 2067 return -1; 2068 } 2069 curr_write_len = tty_insert_flip_string 2070 (tty, urb->transfer_buffer + 2071 serial->curr_rx_urb_offset, 2072 write_length_remaining); 2073 serial->curr_rx_urb_offset += curr_write_len; 2074 write_length_remaining -= curr_write_len; 2075 tty_flip_buffer_push(tty); 2076 } 2077 } 2078 if (write_length_remaining == 0) { 2079 serial->curr_rx_urb_offset = 0; 2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2081 } 2082 tty_kref_put(tty); 2083 return write_length_remaining; 2084 } 2085 2086 2087 /* Base driver functions */ 2088 2089 static void hso_log_port(struct hso_device *hso_dev) 2090 { 2091 char *port_type; 2092 char port_dev[20]; 2093 2094 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2095 case HSO_PORT_CONTROL: 2096 port_type = "Control"; 2097 break; 2098 case HSO_PORT_APP: 2099 port_type = "Application"; 2100 break; 2101 case HSO_PORT_GPS: 2102 port_type = "GPS"; 2103 break; 2104 case HSO_PORT_GPS_CONTROL: 2105 port_type = "GPS control"; 2106 break; 2107 case HSO_PORT_APP2: 2108 port_type = "Application2"; 2109 break; 2110 case HSO_PORT_PCSC: 2111 port_type = "PCSC"; 2112 break; 2113 case HSO_PORT_DIAG: 2114 port_type = "Diagnostic"; 2115 break; 2116 case HSO_PORT_DIAG2: 2117 port_type = "Diagnostic2"; 2118 break; 2119 case HSO_PORT_MODEM: 2120 port_type = "Modem"; 2121 break; 2122 case HSO_PORT_NETWORK: 2123 port_type = "Network"; 2124 break; 2125 default: 2126 port_type = "Unknown"; 2127 break; 2128 } 2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2131 } else 2132 sprintf(port_dev, "/dev/%s%d", tty_filename, 2133 dev2ser(hso_dev)->minor); 2134 2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2136 port_type, port_dev); 2137 } 2138 2139 static int hso_start_net_device(struct hso_device *hso_dev) 2140 { 2141 int i, result = 0; 2142 struct hso_net *hso_net = dev2net(hso_dev); 2143 2144 if (!hso_net) 2145 return -ENODEV; 2146 2147 /* send URBs for all read buffers */ 2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2149 2150 /* Prep a receive URB */ 2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2152 hso_dev->usb, 2153 usb_rcvbulkpipe(hso_dev->usb, 2154 hso_net->in_endp-> 2155 bEndpointAddress & 0x7F), 2156 hso_net->mux_bulk_rx_buf_pool[i], 2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2158 hso_net); 2159 2160 /* Put it out there so the device can send us stuff */ 2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2162 GFP_NOIO); 2163 if (result) 2164 dev_warn(&hso_dev->usb->dev, 2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2166 i, result); 2167 } 2168 2169 return result; 2170 } 2171 2172 static int hso_stop_net_device(struct hso_device *hso_dev) 2173 { 2174 int i; 2175 struct hso_net *hso_net = dev2net(hso_dev); 2176 2177 if (!hso_net) 2178 return -ENODEV; 2179 2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2181 if (hso_net->mux_bulk_rx_urb_pool[i]) 2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2183 2184 } 2185 if (hso_net->mux_bulk_tx_urb) 2186 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2187 2188 return 0; 2189 } 2190 2191 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2192 { 2193 int i, result = 0; 2194 struct hso_serial *serial = dev2ser(hso_dev); 2195 2196 if (!serial) 2197 return -ENODEV; 2198 2199 /* If it is not the MUX port fill in and submit a bulk urb (already 2200 * allocated in hso_serial_start) */ 2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2202 for (i = 0; i < serial->num_rx_urbs; i++) { 2203 usb_fill_bulk_urb(serial->rx_urb[i], 2204 serial->parent->usb, 2205 usb_rcvbulkpipe(serial->parent->usb, 2206 serial->in_endp-> 2207 bEndpointAddress & 2208 0x7F), 2209 serial->rx_data[i], 2210 serial->rx_data_length, 2211 hso_std_serial_read_bulk_callback, 2212 serial); 2213 result = usb_submit_urb(serial->rx_urb[i], flags); 2214 if (result) { 2215 dev_warn(&serial->parent->usb->dev, 2216 "Failed to submit urb - res %d\n", 2217 result); 2218 break; 2219 } 2220 } 2221 } else { 2222 mutex_lock(&serial->shared_int->shared_int_lock); 2223 if (!serial->shared_int->use_count) { 2224 result = 2225 hso_mux_submit_intr_urb(serial->shared_int, 2226 hso_dev->usb, flags); 2227 } 2228 serial->shared_int->use_count++; 2229 mutex_unlock(&serial->shared_int->shared_int_lock); 2230 } 2231 if (serial->tiocmget) 2232 tiocmget_submit_urb(serial, 2233 serial->tiocmget, 2234 serial->parent->usb); 2235 return result; 2236 } 2237 2238 static int hso_stop_serial_device(struct hso_device *hso_dev) 2239 { 2240 int i; 2241 struct hso_serial *serial = dev2ser(hso_dev); 2242 struct hso_tiocmget *tiocmget; 2243 2244 if (!serial) 2245 return -ENODEV; 2246 2247 for (i = 0; i < serial->num_rx_urbs; i++) { 2248 if (serial->rx_urb[i]) { 2249 usb_kill_urb(serial->rx_urb[i]); 2250 serial->rx_urb_filled[i] = 0; 2251 } 2252 } 2253 serial->curr_rx_urb_idx = 0; 2254 serial->curr_rx_urb_offset = 0; 2255 2256 if (serial->tx_urb) 2257 usb_kill_urb(serial->tx_urb); 2258 2259 if (serial->shared_int) { 2260 mutex_lock(&serial->shared_int->shared_int_lock); 2261 if (serial->shared_int->use_count && 2262 (--serial->shared_int->use_count == 0)) { 2263 struct urb *urb; 2264 2265 urb = serial->shared_int->shared_intr_urb; 2266 if (urb) 2267 usb_kill_urb(urb); 2268 } 2269 mutex_unlock(&serial->shared_int->shared_int_lock); 2270 } 2271 tiocmget = serial->tiocmget; 2272 if (tiocmget) { 2273 wake_up_interruptible(&tiocmget->waitq); 2274 usb_kill_urb(tiocmget->urb); 2275 } 2276 2277 return 0; 2278 } 2279 2280 static void hso_serial_common_free(struct hso_serial *serial) 2281 { 2282 int i; 2283 2284 if (serial->parent->dev) 2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2286 2287 tty_unregister_device(tty_drv, serial->minor); 2288 2289 for (i = 0; i < serial->num_rx_urbs; i++) { 2290 /* unlink and free RX URB */ 2291 usb_free_urb(serial->rx_urb[i]); 2292 /* free the RX buffer */ 2293 kfree(serial->rx_data[i]); 2294 } 2295 2296 /* unlink and free TX URB */ 2297 usb_free_urb(serial->tx_urb); 2298 kfree(serial->tx_data); 2299 } 2300 2301 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2302 int rx_size, int tx_size) 2303 { 2304 struct device *dev; 2305 int minor; 2306 int i; 2307 2308 minor = get_free_serial_index(); 2309 if (minor < 0) 2310 goto exit; 2311 2312 /* register our minor number */ 2313 serial->parent->dev = tty_register_device(tty_drv, minor, 2314 &serial->parent->interface->dev); 2315 dev = serial->parent->dev; 2316 dev->driver_data = serial->parent; 2317 i = device_create_file(dev, &dev_attr_hsotype); 2318 2319 /* fill in specific data for later use */ 2320 serial->minor = minor; 2321 serial->magic = HSO_SERIAL_MAGIC; 2322 spin_lock_init(&serial->serial_lock); 2323 serial->num_rx_urbs = num_urbs; 2324 2325 /* RX, allocate urb and initialize */ 2326 2327 /* prepare our RX buffer */ 2328 serial->rx_data_length = rx_size; 2329 for (i = 0; i < serial->num_rx_urbs; i++) { 2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2331 if (!serial->rx_urb[i]) { 2332 dev_err(dev, "Could not allocate urb?\n"); 2333 goto exit; 2334 } 2335 serial->rx_urb[i]->transfer_buffer = NULL; 2336 serial->rx_urb[i]->transfer_buffer_length = 0; 2337 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2338 GFP_KERNEL); 2339 if (!serial->rx_data[i]) { 2340 dev_err(dev, "%s - Out of memory\n", __func__); 2341 goto exit; 2342 } 2343 } 2344 2345 /* TX, allocate urb and initialize */ 2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2347 if (!serial->tx_urb) { 2348 dev_err(dev, "Could not allocate urb?\n"); 2349 goto exit; 2350 } 2351 serial->tx_urb->transfer_buffer = NULL; 2352 serial->tx_urb->transfer_buffer_length = 0; 2353 /* prepare our TX buffer */ 2354 serial->tx_data_count = 0; 2355 serial->tx_buffer_count = 0; 2356 serial->tx_data_length = tx_size; 2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2358 if (!serial->tx_data) { 2359 dev_err(dev, "%s - Out of memory", __func__); 2360 goto exit; 2361 } 2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2363 if (!serial->tx_buffer) { 2364 dev_err(dev, "%s - Out of memory", __func__); 2365 goto exit; 2366 } 2367 2368 return 0; 2369 exit: 2370 hso_serial_common_free(serial); 2371 return -1; 2372 } 2373 2374 /* Creates a general hso device */ 2375 static struct hso_device *hso_create_device(struct usb_interface *intf, 2376 int port_spec) 2377 { 2378 struct hso_device *hso_dev; 2379 2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2381 if (!hso_dev) 2382 return NULL; 2383 2384 hso_dev->port_spec = port_spec; 2385 hso_dev->usb = interface_to_usbdev(intf); 2386 hso_dev->interface = intf; 2387 kref_init(&hso_dev->ref); 2388 mutex_init(&hso_dev->mutex); 2389 2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2392 2393 return hso_dev; 2394 } 2395 2396 /* Removes a network device in the network device table */ 2397 static int remove_net_device(struct hso_device *hso_dev) 2398 { 2399 int i; 2400 2401 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2402 if (network_table[i] == hso_dev) { 2403 network_table[i] = NULL; 2404 break; 2405 } 2406 } 2407 if (i == HSO_MAX_NET_DEVICES) 2408 return -1; 2409 return 0; 2410 } 2411 2412 /* Frees our network device */ 2413 static void hso_free_net_device(struct hso_device *hso_dev) 2414 { 2415 int i; 2416 struct hso_net *hso_net = dev2net(hso_dev); 2417 2418 if (!hso_net) 2419 return; 2420 2421 remove_net_device(hso_net->parent); 2422 2423 if (hso_net->net) { 2424 unregister_netdev(hso_net->net); 2425 free_netdev(hso_net->net); 2426 } 2427 2428 /* start freeing */ 2429 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2430 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2431 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2432 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2433 } 2434 usb_free_urb(hso_net->mux_bulk_tx_urb); 2435 kfree(hso_net->mux_bulk_tx_buf); 2436 hso_net->mux_bulk_tx_buf = NULL; 2437 2438 kfree(hso_dev); 2439 } 2440 2441 static const struct net_device_ops hso_netdev_ops = { 2442 .ndo_open = hso_net_open, 2443 .ndo_stop = hso_net_close, 2444 .ndo_start_xmit = hso_net_start_xmit, 2445 .ndo_tx_timeout = hso_net_tx_timeout, 2446 }; 2447 2448 /* initialize the network interface */ 2449 static void hso_net_init(struct net_device *net) 2450 { 2451 struct hso_net *hso_net = netdev_priv(net); 2452 2453 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2454 2455 /* fill in the other fields */ 2456 net->netdev_ops = &hso_netdev_ops; 2457 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2458 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2459 net->type = ARPHRD_NONE; 2460 net->mtu = DEFAULT_MTU - 14; 2461 net->tx_queue_len = 10; 2462 SET_ETHTOOL_OPS(net, &ops); 2463 2464 /* and initialize the semaphore */ 2465 spin_lock_init(&hso_net->net_lock); 2466 } 2467 2468 /* Adds a network device in the network device table */ 2469 static int add_net_device(struct hso_device *hso_dev) 2470 { 2471 int i; 2472 2473 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2474 if (network_table[i] == NULL) { 2475 network_table[i] = hso_dev; 2476 break; 2477 } 2478 } 2479 if (i == HSO_MAX_NET_DEVICES) 2480 return -1; 2481 return 0; 2482 } 2483 2484 static int hso_radio_toggle(void *data, enum rfkill_state state) 2485 { 2486 struct hso_device *hso_dev = data; 2487 int enabled = (state == RFKILL_STATE_ON); 2488 int rv; 2489 2490 mutex_lock(&hso_dev->mutex); 2491 if (hso_dev->usb_gone) 2492 rv = 0; 2493 else 2494 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2495 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2496 USB_CTRL_SET_TIMEOUT); 2497 mutex_unlock(&hso_dev->mutex); 2498 return rv; 2499 } 2500 2501 /* Creates and sets up everything for rfkill */ 2502 static void hso_create_rfkill(struct hso_device *hso_dev, 2503 struct usb_interface *interface) 2504 { 2505 struct hso_net *hso_net = dev2net(hso_dev); 2506 struct device *dev = &hso_net->net->dev; 2507 char *rfkn; 2508 2509 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, 2510 RFKILL_TYPE_WWAN); 2511 if (!hso_net->rfkill) { 2512 dev_err(dev, "%s - Out of memory\n", __func__); 2513 return; 2514 } 2515 rfkn = kzalloc(20, GFP_KERNEL); 2516 if (!rfkn) { 2517 rfkill_free(hso_net->rfkill); 2518 hso_net->rfkill = NULL; 2519 dev_err(dev, "%s - Out of memory\n", __func__); 2520 return; 2521 } 2522 snprintf(rfkn, 20, "hso-%d", 2523 interface->altsetting->desc.bInterfaceNumber); 2524 hso_net->rfkill->name = rfkn; 2525 hso_net->rfkill->state = RFKILL_STATE_ON; 2526 hso_net->rfkill->data = hso_dev; 2527 hso_net->rfkill->toggle_radio = hso_radio_toggle; 2528 if (rfkill_register(hso_net->rfkill) < 0) { 2529 kfree(rfkn); 2530 hso_net->rfkill->name = NULL; 2531 rfkill_free(hso_net->rfkill); 2532 hso_net->rfkill = NULL; 2533 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2534 return; 2535 } 2536 } 2537 2538 /* Creates our network device */ 2539 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2540 int port_spec) 2541 { 2542 int result, i; 2543 struct net_device *net; 2544 struct hso_net *hso_net; 2545 struct hso_device *hso_dev; 2546 2547 hso_dev = hso_create_device(interface, port_spec); 2548 if (!hso_dev) 2549 return NULL; 2550 2551 /* allocate our network device, then we can put in our private data */ 2552 /* call hso_net_init to do the basic initialization */ 2553 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2554 if (!net) { 2555 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2556 goto exit; 2557 } 2558 2559 hso_net = netdev_priv(net); 2560 2561 hso_dev->port_data.dev_net = hso_net; 2562 hso_net->net = net; 2563 hso_net->parent = hso_dev; 2564 2565 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2566 USB_DIR_IN); 2567 if (!hso_net->in_endp) { 2568 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2569 goto exit; 2570 } 2571 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2572 USB_DIR_OUT); 2573 if (!hso_net->out_endp) { 2574 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2575 goto exit; 2576 } 2577 SET_NETDEV_DEV(net, &interface->dev); 2578 2579 /* registering our net device */ 2580 result = register_netdev(net); 2581 if (result) { 2582 dev_err(&interface->dev, "Failed to register device\n"); 2583 goto exit; 2584 } 2585 2586 /* start allocating */ 2587 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2588 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2589 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2590 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2591 goto exit; 2592 } 2593 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2594 GFP_KERNEL); 2595 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2596 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2597 goto exit; 2598 } 2599 } 2600 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2601 if (!hso_net->mux_bulk_tx_urb) { 2602 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2603 goto exit; 2604 } 2605 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2606 if (!hso_net->mux_bulk_tx_buf) { 2607 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2608 goto exit; 2609 } 2610 2611 add_net_device(hso_dev); 2612 2613 hso_log_port(hso_dev); 2614 2615 hso_create_rfkill(hso_dev, interface); 2616 2617 return hso_dev; 2618 exit: 2619 hso_free_net_device(hso_dev); 2620 return NULL; 2621 } 2622 2623 static void hso_free_tiomget(struct hso_serial *serial) 2624 { 2625 struct hso_tiocmget *tiocmget = serial->tiocmget; 2626 if (tiocmget) { 2627 if (tiocmget->urb) { 2628 usb_free_urb(tiocmget->urb); 2629 tiocmget->urb = NULL; 2630 } 2631 serial->tiocmget = NULL; 2632 kfree(tiocmget); 2633 2634 } 2635 } 2636 2637 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2638 static void hso_free_serial_device(struct hso_device *hso_dev) 2639 { 2640 struct hso_serial *serial = dev2ser(hso_dev); 2641 2642 if (!serial) 2643 return; 2644 set_serial_by_index(serial->minor, NULL); 2645 2646 hso_serial_common_free(serial); 2647 2648 if (serial->shared_int) { 2649 mutex_lock(&serial->shared_int->shared_int_lock); 2650 if (--serial->shared_int->ref_count == 0) 2651 hso_free_shared_int(serial->shared_int); 2652 else 2653 mutex_unlock(&serial->shared_int->shared_int_lock); 2654 } 2655 hso_free_tiomget(serial); 2656 kfree(serial); 2657 kfree(hso_dev); 2658 } 2659 2660 /* Creates a bulk AT channel */ 2661 static struct hso_device *hso_create_bulk_serial_device( 2662 struct usb_interface *interface, int port) 2663 { 2664 struct hso_device *hso_dev; 2665 struct hso_serial *serial; 2666 int num_urbs; 2667 struct hso_tiocmget *tiocmget; 2668 2669 hso_dev = hso_create_device(interface, port); 2670 if (!hso_dev) 2671 return NULL; 2672 2673 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2674 if (!serial) 2675 goto exit; 2676 2677 serial->parent = hso_dev; 2678 hso_dev->port_data.dev_serial = serial; 2679 2680 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2681 num_urbs = 2; 2682 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2683 GFP_KERNEL); 2684 /* it isn't going to break our heart if serial->tiocmget 2685 * allocation fails don't bother checking this. 2686 */ 2687 if (serial->tiocmget) { 2688 tiocmget = serial->tiocmget; 2689 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2690 if (tiocmget->urb) { 2691 mutex_init(&tiocmget->mutex); 2692 init_waitqueue_head(&tiocmget->waitq); 2693 tiocmget->endp = hso_get_ep( 2694 interface, 2695 USB_ENDPOINT_XFER_INT, 2696 USB_DIR_IN); 2697 } else 2698 hso_free_tiomget(serial); 2699 } 2700 } 2701 else 2702 num_urbs = 1; 2703 2704 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2705 BULK_URB_TX_SIZE)) 2706 goto exit; 2707 2708 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2709 USB_DIR_IN); 2710 if (!serial->in_endp) { 2711 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2712 goto exit2; 2713 } 2714 2715 if (! 2716 (serial->out_endp = 2717 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2718 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2719 goto exit2; 2720 } 2721 2722 serial->write_data = hso_std_serial_write_data; 2723 2724 /* and record this serial */ 2725 set_serial_by_index(serial->minor, serial); 2726 2727 /* setup the proc dirs and files if needed */ 2728 hso_log_port(hso_dev); 2729 2730 /* done, return it */ 2731 return hso_dev; 2732 2733 exit2: 2734 hso_serial_common_free(serial); 2735 exit: 2736 hso_free_tiomget(serial); 2737 kfree(serial); 2738 kfree(hso_dev); 2739 return NULL; 2740 } 2741 2742 /* Creates a multiplexed AT channel */ 2743 static 2744 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2745 int port, 2746 struct hso_shared_int *mux) 2747 { 2748 struct hso_device *hso_dev; 2749 struct hso_serial *serial; 2750 int port_spec; 2751 2752 port_spec = HSO_INTF_MUX; 2753 port_spec &= ~HSO_PORT_MASK; 2754 2755 port_spec |= hso_mux_to_port(port); 2756 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2757 return NULL; 2758 2759 hso_dev = hso_create_device(interface, port_spec); 2760 if (!hso_dev) 2761 return NULL; 2762 2763 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2764 if (!serial) 2765 goto exit; 2766 2767 hso_dev->port_data.dev_serial = serial; 2768 serial->parent = hso_dev; 2769 2770 if (hso_serial_common_create 2771 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2772 goto exit; 2773 2774 serial->tx_data_length--; 2775 serial->write_data = hso_mux_serial_write_data; 2776 2777 serial->shared_int = mux; 2778 mutex_lock(&serial->shared_int->shared_int_lock); 2779 serial->shared_int->ref_count++; 2780 mutex_unlock(&serial->shared_int->shared_int_lock); 2781 2782 /* and record this serial */ 2783 set_serial_by_index(serial->minor, serial); 2784 2785 /* setup the proc dirs and files if needed */ 2786 hso_log_port(hso_dev); 2787 2788 /* done, return it */ 2789 return hso_dev; 2790 2791 exit: 2792 if (serial) { 2793 tty_unregister_device(tty_drv, serial->minor); 2794 kfree(serial); 2795 } 2796 if (hso_dev) 2797 kfree(hso_dev); 2798 return NULL; 2799 2800 } 2801 2802 static void hso_free_shared_int(struct hso_shared_int *mux) 2803 { 2804 usb_free_urb(mux->shared_intr_urb); 2805 kfree(mux->shared_intr_buf); 2806 mutex_unlock(&mux->shared_int_lock); 2807 kfree(mux); 2808 } 2809 2810 static 2811 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2812 { 2813 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2814 2815 if (!mux) 2816 return NULL; 2817 2818 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2819 USB_DIR_IN); 2820 if (!mux->intr_endp) { 2821 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2822 goto exit; 2823 } 2824 2825 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2826 if (!mux->shared_intr_urb) { 2827 dev_err(&interface->dev, "Could not allocate intr urb?"); 2828 goto exit; 2829 } 2830 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, 2831 GFP_KERNEL); 2832 if (!mux->shared_intr_buf) { 2833 dev_err(&interface->dev, "Could not allocate intr buf?"); 2834 goto exit; 2835 } 2836 2837 mutex_init(&mux->shared_int_lock); 2838 2839 return mux; 2840 2841 exit: 2842 kfree(mux->shared_intr_buf); 2843 usb_free_urb(mux->shared_intr_urb); 2844 kfree(mux); 2845 return NULL; 2846 } 2847 2848 /* Gets the port spec for a certain interface */ 2849 static int hso_get_config_data(struct usb_interface *interface) 2850 { 2851 struct usb_device *usbdev = interface_to_usbdev(interface); 2852 u8 config_data[17]; 2853 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2854 s32 result; 2855 2856 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2857 0x86, 0xC0, 0, 0, config_data, 17, 2858 USB_CTRL_SET_TIMEOUT) != 0x11) { 2859 return -EIO; 2860 } 2861 2862 switch (config_data[if_num]) { 2863 case 0x0: 2864 result = 0; 2865 break; 2866 case 0x1: 2867 result = HSO_PORT_DIAG; 2868 break; 2869 case 0x2: 2870 result = HSO_PORT_GPS; 2871 break; 2872 case 0x3: 2873 result = HSO_PORT_GPS_CONTROL; 2874 break; 2875 case 0x4: 2876 result = HSO_PORT_APP; 2877 break; 2878 case 0x5: 2879 result = HSO_PORT_APP2; 2880 break; 2881 case 0x6: 2882 result = HSO_PORT_CONTROL; 2883 break; 2884 case 0x7: 2885 result = HSO_PORT_NETWORK; 2886 break; 2887 case 0x8: 2888 result = HSO_PORT_MODEM; 2889 break; 2890 case 0x9: 2891 result = HSO_PORT_MSD; 2892 break; 2893 case 0xa: 2894 result = HSO_PORT_PCSC; 2895 break; 2896 case 0xb: 2897 result = HSO_PORT_VOICE; 2898 break; 2899 default: 2900 result = 0; 2901 } 2902 2903 if (result) 2904 result |= HSO_INTF_BULK; 2905 2906 if (config_data[16] & 0x1) 2907 result |= HSO_INFO_CRC_BUG; 2908 2909 return result; 2910 } 2911 2912 /* called once for each interface upon device insertion */ 2913 static int hso_probe(struct usb_interface *interface, 2914 const struct usb_device_id *id) 2915 { 2916 int mux, i, if_num, port_spec; 2917 unsigned char port_mask; 2918 struct hso_device *hso_dev = NULL; 2919 struct hso_shared_int *shared_int; 2920 struct hso_device *tmp_dev = NULL; 2921 2922 if_num = interface->altsetting->desc.bInterfaceNumber; 2923 2924 /* Get the interface/port specification from either driver_info or from 2925 * the device itself */ 2926 if (id->driver_info) 2927 port_spec = ((u32 *)(id->driver_info))[if_num]; 2928 else 2929 port_spec = hso_get_config_data(interface); 2930 2931 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2932 dev_err(&interface->dev, "Not our interface\n"); 2933 return -ENODEV; 2934 } 2935 /* Check if we need to switch to alt interfaces prior to port 2936 * configuration */ 2937 if (interface->num_altsetting > 1) 2938 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2939 interface->needs_remote_wakeup = 1; 2940 2941 /* Allocate new hso device(s) */ 2942 switch (port_spec & HSO_INTF_MASK) { 2943 case HSO_INTF_MUX: 2944 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2945 /* Create the network device */ 2946 if (!disable_net) { 2947 hso_dev = hso_create_net_device(interface, 2948 port_spec); 2949 if (!hso_dev) 2950 goto exit; 2951 tmp_dev = hso_dev; 2952 } 2953 } 2954 2955 if (hso_get_mux_ports(interface, &port_mask)) 2956 /* TODO: de-allocate everything */ 2957 goto exit; 2958 2959 shared_int = hso_create_shared_int(interface); 2960 if (!shared_int) 2961 goto exit; 2962 2963 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2964 if (port_mask & i) { 2965 hso_dev = hso_create_mux_serial_device( 2966 interface, i, shared_int); 2967 if (!hso_dev) 2968 goto exit; 2969 } 2970 } 2971 2972 if (tmp_dev) 2973 hso_dev = tmp_dev; 2974 break; 2975 2976 case HSO_INTF_BULK: 2977 /* It's a regular bulk interface */ 2978 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) 2979 && !disable_net) 2980 hso_dev = hso_create_net_device(interface, port_spec); 2981 else 2982 hso_dev = 2983 hso_create_bulk_serial_device(interface, port_spec); 2984 if (!hso_dev) 2985 goto exit; 2986 break; 2987 default: 2988 goto exit; 2989 } 2990 2991 /* save our data pointer in this device */ 2992 usb_set_intfdata(interface, hso_dev); 2993 2994 /* done */ 2995 return 0; 2996 exit: 2997 hso_free_interface(interface); 2998 return -ENODEV; 2999 } 3000 3001 /* device removed, cleaning up */ 3002 static void hso_disconnect(struct usb_interface *interface) 3003 { 3004 hso_free_interface(interface); 3005 3006 /* remove reference of our private data */ 3007 usb_set_intfdata(interface, NULL); 3008 } 3009 3010 static void async_get_intf(struct work_struct *data) 3011 { 3012 struct hso_device *hso_dev = 3013 container_of(data, struct hso_device, async_get_intf); 3014 usb_autopm_get_interface(hso_dev->interface); 3015 } 3016 3017 static void async_put_intf(struct work_struct *data) 3018 { 3019 struct hso_device *hso_dev = 3020 container_of(data, struct hso_device, async_put_intf); 3021 usb_autopm_put_interface(hso_dev->interface); 3022 } 3023 3024 static int hso_get_activity(struct hso_device *hso_dev) 3025 { 3026 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3027 if (!hso_dev->is_active) { 3028 hso_dev->is_active = 1; 3029 schedule_work(&hso_dev->async_get_intf); 3030 } 3031 } 3032 3033 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3034 return -EAGAIN; 3035 3036 usb_mark_last_busy(hso_dev->usb); 3037 3038 return 0; 3039 } 3040 3041 static int hso_put_activity(struct hso_device *hso_dev) 3042 { 3043 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3044 if (hso_dev->is_active) { 3045 hso_dev->is_active = 0; 3046 schedule_work(&hso_dev->async_put_intf); 3047 return -EAGAIN; 3048 } 3049 } 3050 hso_dev->is_active = 0; 3051 return 0; 3052 } 3053 3054 /* called by kernel when we need to suspend device */ 3055 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3056 { 3057 int i, result; 3058 3059 /* Stop all serial ports */ 3060 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3061 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3062 result = hso_stop_serial_device(serial_table[i]); 3063 if (result) 3064 goto out; 3065 } 3066 } 3067 3068 /* Stop all network ports */ 3069 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3070 if (network_table[i] && 3071 (network_table[i]->interface == iface)) { 3072 result = hso_stop_net_device(network_table[i]); 3073 if (result) 3074 goto out; 3075 } 3076 } 3077 3078 out: 3079 return 0; 3080 } 3081 3082 /* called by kernel when we need to resume device */ 3083 static int hso_resume(struct usb_interface *iface) 3084 { 3085 int i, result = 0; 3086 struct hso_net *hso_net; 3087 3088 /* Start all serial ports */ 3089 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3090 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3091 if (dev2ser(serial_table[i])->open_count) { 3092 result = 3093 hso_start_serial_device(serial_table[i], GFP_NOIO); 3094 hso_kick_transmit(dev2ser(serial_table[i])); 3095 if (result) 3096 goto out; 3097 } 3098 } 3099 } 3100 3101 /* Start all network ports */ 3102 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3103 if (network_table[i] && 3104 (network_table[i]->interface == iface)) { 3105 hso_net = dev2net(network_table[i]); 3106 if (hso_net->flags & IFF_UP) { 3107 /* First transmit any lingering data, 3108 then restart the device. */ 3109 if (hso_net->skb_tx_buf) { 3110 dev_dbg(&iface->dev, 3111 "Transmitting" 3112 " lingering data\n"); 3113 hso_net_start_xmit(hso_net->skb_tx_buf, 3114 hso_net->net); 3115 hso_net->skb_tx_buf = NULL; 3116 } 3117 result = hso_start_net_device(network_table[i]); 3118 if (result) 3119 goto out; 3120 } 3121 } 3122 } 3123 3124 out: 3125 return result; 3126 } 3127 3128 static void hso_serial_ref_free(struct kref *ref) 3129 { 3130 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3131 3132 hso_free_serial_device(hso_dev); 3133 } 3134 3135 static void hso_free_interface(struct usb_interface *interface) 3136 { 3137 struct hso_serial *hso_dev; 3138 struct tty_struct *tty; 3139 int i; 3140 3141 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3142 if (serial_table[i] 3143 && (serial_table[i]->interface == interface)) { 3144 hso_dev = dev2ser(serial_table[i]); 3145 spin_lock_irq(&hso_dev->serial_lock); 3146 tty = tty_kref_get(hso_dev->tty); 3147 spin_unlock_irq(&hso_dev->serial_lock); 3148 if (tty) 3149 tty_hangup(tty); 3150 mutex_lock(&hso_dev->parent->mutex); 3151 tty_kref_put(tty); 3152 hso_dev->parent->usb_gone = 1; 3153 mutex_unlock(&hso_dev->parent->mutex); 3154 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3155 } 3156 } 3157 3158 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3159 if (network_table[i] 3160 && (network_table[i]->interface == interface)) { 3161 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3162 /* hso_stop_net_device doesn't stop the net queue since 3163 * traffic needs to start it again when suspended */ 3164 netif_stop_queue(dev2net(network_table[i])->net); 3165 hso_stop_net_device(network_table[i]); 3166 cancel_work_sync(&network_table[i]->async_put_intf); 3167 cancel_work_sync(&network_table[i]->async_get_intf); 3168 if (rfk) 3169 rfkill_unregister(rfk); 3170 hso_free_net_device(network_table[i]); 3171 } 3172 } 3173 } 3174 3175 /* Helper functions */ 3176 3177 /* Get the endpoint ! */ 3178 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3179 int type, int dir) 3180 { 3181 int i; 3182 struct usb_host_interface *iface = intf->cur_altsetting; 3183 struct usb_endpoint_descriptor *endp; 3184 3185 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3186 endp = &iface->endpoint[i].desc; 3187 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3188 (usb_endpoint_type(endp) == type)) 3189 return endp; 3190 } 3191 3192 return NULL; 3193 } 3194 3195 /* Get the byte that describes which ports are enabled */ 3196 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3197 { 3198 int i; 3199 struct usb_host_interface *iface = intf->cur_altsetting; 3200 3201 if (iface->extralen == 3) { 3202 *ports = iface->extra[2]; 3203 return 0; 3204 } 3205 3206 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3207 if (iface->endpoint[i].extralen == 3) { 3208 *ports = iface->endpoint[i].extra[2]; 3209 return 0; 3210 } 3211 } 3212 3213 return -1; 3214 } 3215 3216 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3217 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3218 struct usb_device *usb, gfp_t gfp) 3219 { 3220 int result; 3221 3222 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3223 usb_rcvintpipe(usb, 3224 shared_int->intr_endp->bEndpointAddress & 0x7F), 3225 shared_int->shared_intr_buf, 3226 shared_int->intr_endp->wMaxPacketSize, 3227 intr_callback, shared_int, 3228 shared_int->intr_endp->bInterval); 3229 3230 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3231 if (result) 3232 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, 3233 result); 3234 3235 return result; 3236 } 3237 3238 /* operations setup of the serial interface */ 3239 static const struct tty_operations hso_serial_ops = { 3240 .open = hso_serial_open, 3241 .close = hso_serial_close, 3242 .write = hso_serial_write, 3243 .write_room = hso_serial_write_room, 3244 .ioctl = hso_serial_ioctl, 3245 .set_termios = hso_serial_set_termios, 3246 .chars_in_buffer = hso_serial_chars_in_buffer, 3247 .tiocmget = hso_serial_tiocmget, 3248 .tiocmset = hso_serial_tiocmset, 3249 .unthrottle = hso_unthrottle 3250 }; 3251 3252 static struct usb_driver hso_driver = { 3253 .name = driver_name, 3254 .probe = hso_probe, 3255 .disconnect = hso_disconnect, 3256 .id_table = hso_ids, 3257 .suspend = hso_suspend, 3258 .resume = hso_resume, 3259 .reset_resume = hso_resume, 3260 .supports_autosuspend = 1, 3261 }; 3262 3263 static int __init hso_init(void) 3264 { 3265 int i; 3266 int result; 3267 3268 /* put it in the log */ 3269 printk(KERN_INFO "hso: %s\n", version); 3270 3271 /* Initialise the serial table semaphore and table */ 3272 spin_lock_init(&serial_table_lock); 3273 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3274 serial_table[i] = NULL; 3275 3276 /* allocate our driver using the proper amount of supported minors */ 3277 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3278 if (!tty_drv) 3279 return -ENOMEM; 3280 3281 /* fill in all needed values */ 3282 tty_drv->magic = TTY_DRIVER_MAGIC; 3283 tty_drv->owner = THIS_MODULE; 3284 tty_drv->driver_name = driver_name; 3285 tty_drv->name = tty_filename; 3286 3287 /* if major number is provided as parameter, use that one */ 3288 if (tty_major) 3289 tty_drv->major = tty_major; 3290 3291 tty_drv->minor_start = 0; 3292 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3293 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3294 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3295 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3296 tty_drv->init_termios = tty_std_termios; 3297 hso_init_termios(&tty_drv->init_termios); 3298 tty_set_operations(tty_drv, &hso_serial_ops); 3299 3300 /* register the tty driver */ 3301 result = tty_register_driver(tty_drv); 3302 if (result) { 3303 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3304 __func__, result); 3305 return result; 3306 } 3307 3308 /* register this module as an usb driver */ 3309 result = usb_register(&hso_driver); 3310 if (result) { 3311 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3312 result); 3313 /* cleanup serial interface */ 3314 tty_unregister_driver(tty_drv); 3315 return result; 3316 } 3317 3318 /* done */ 3319 return 0; 3320 } 3321 3322 static void __exit hso_exit(void) 3323 { 3324 printk(KERN_INFO "hso: unloaded\n"); 3325 3326 tty_unregister_driver(tty_drv); 3327 /* deregister the usb driver */ 3328 usb_deregister(&hso_driver); 3329 } 3330 3331 /* Module definitions */ 3332 module_init(hso_init); 3333 module_exit(hso_exit); 3334 3335 MODULE_AUTHOR(MOD_AUTHOR); 3336 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3337 MODULE_LICENSE(MOD_LICENSE); 3338 MODULE_INFO(Version, DRIVER_VERSION); 3339 3340 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3341 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3342 module_param(debug, int, S_IRUGO | S_IWUSR); 3343 3344 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3345 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3346 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3347 3348 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3349 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3350 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3351