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