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 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 9 * <ajb@spheresystems.co.uk> 10 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 11 * Copyright (C) 2008 Novell, Inc. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License version 2 as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 25 * USA 26 * 27 * 28 *****************************************************************************/ 29 30 /****************************************************************************** 31 * 32 * Description of the device: 33 * 34 * Interface 0: Contains the IP network interface on the bulk end points. 35 * The multiplexed serial ports are using the interrupt and 36 * control endpoints. 37 * Interrupt contains a bitmap telling which multiplexed 38 * serialport needs servicing. 39 * 40 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 41 * port is opened, as this have a huge impact on the network port 42 * throughput. 43 * 44 * Interface 2: Standard modem interface - circuit switched interface, this 45 * can be used to make a standard ppp connection however it 46 * should not be used in conjunction with the IP network interface 47 * enabled for USB performance reasons i.e. if using this set 48 * ideally disable_net=1. 49 * 50 *****************************************************************************/ 51 52 #include <linux/sched.h> 53 #include <linux/slab.h> 54 #include <linux/init.h> 55 #include <linux/delay.h> 56 #include <linux/netdevice.h> 57 #include <linux/module.h> 58 #include <linux/ethtool.h> 59 #include <linux/usb.h> 60 #include <linux/timer.h> 61 #include <linux/tty.h> 62 #include <linux/tty_driver.h> 63 #include <linux/tty_flip.h> 64 #include <linux/kmod.h> 65 #include <linux/rfkill.h> 66 #include <linux/ip.h> 67 #include <linux/uaccess.h> 68 #include <linux/usb/cdc.h> 69 #include <net/arp.h> 70 #include <asm/byteorder.h> 71 #include <linux/serial_core.h> 72 #include <linux/serial.h> 73 74 75 #define DRIVER_VERSION "1.2" 76 #define MOD_AUTHOR "Option Wireless" 77 #define MOD_DESCRIPTION "USB High Speed Option driver" 78 #define MOD_LICENSE "GPL" 79 80 #define HSO_MAX_NET_DEVICES 10 81 #define HSO__MAX_MTU 2048 82 #define DEFAULT_MTU 1500 83 #define DEFAULT_MRU 1500 84 85 #define CTRL_URB_RX_SIZE 1024 86 #define CTRL_URB_TX_SIZE 64 87 88 #define BULK_URB_RX_SIZE 4096 89 #define BULK_URB_TX_SIZE 8192 90 91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_RX_BUF_COUNT 4 94 #define USB_TYPE_OPTION_VENDOR 0x20 95 96 /* These definitions are used with the struct hso_net flags element */ 97 /* - use *_bit operations on it. (bit indices not values.) */ 98 #define HSO_NET_RUNNING 0 99 100 #define HSO_NET_TX_TIMEOUT (HZ*10) 101 102 #define HSO_SERIAL_MAGIC 0x48534f31 103 104 /* Number of ttys to handle */ 105 #define HSO_SERIAL_TTY_MINORS 256 106 107 #define MAX_RX_URBS 2 108 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 110 { 111 if (tty) 112 return tty->driver_data; 113 return NULL; 114 } 115 116 /*****************************************************************************/ 117 /* Debugging functions */ 118 /*****************************************************************************/ 119 #define D__(lvl_, fmt, arg...) \ 120 do { \ 121 printk(lvl_ "[%d:%s]: " fmt "\n", \ 122 __LINE__, __func__, ## arg); \ 123 } while (0) 124 125 #define D_(lvl, args...) \ 126 do { \ 127 if (lvl & debug) \ 128 D__(KERN_INFO, args); \ 129 } while (0) 130 131 #define D1(args...) D_(0x01, ##args) 132 #define D2(args...) D_(0x02, ##args) 133 #define D3(args...) D_(0x04, ##args) 134 #define D4(args...) D_(0x08, ##args) 135 #define D5(args...) D_(0x10, ##args) 136 137 /*****************************************************************************/ 138 /* Enumerators */ 139 /*****************************************************************************/ 140 enum pkt_parse_state { 141 WAIT_IP, 142 WAIT_DATA, 143 WAIT_SYNC 144 }; 145 146 /*****************************************************************************/ 147 /* Structs */ 148 /*****************************************************************************/ 149 150 struct hso_shared_int { 151 struct usb_endpoint_descriptor *intr_endp; 152 void *shared_intr_buf; 153 struct urb *shared_intr_urb; 154 struct usb_device *usb; 155 int use_count; 156 int ref_count; 157 struct mutex shared_int_lock; 158 }; 159 160 struct hso_net { 161 struct hso_device *parent; 162 struct net_device *net; 163 struct rfkill *rfkill; 164 165 struct usb_endpoint_descriptor *in_endp; 166 struct usb_endpoint_descriptor *out_endp; 167 168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 169 struct urb *mux_bulk_tx_urb; 170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 171 void *mux_bulk_tx_buf; 172 173 struct sk_buff *skb_rx_buf; 174 struct sk_buff *skb_tx_buf; 175 176 enum pkt_parse_state rx_parse_state; 177 spinlock_t net_lock; 178 179 unsigned short rx_buf_size; 180 unsigned short rx_buf_missing; 181 struct iphdr rx_ip_hdr; 182 183 unsigned long flags; 184 }; 185 186 enum rx_ctrl_state{ 187 RX_IDLE, 188 RX_SENT, 189 RX_PENDING 190 }; 191 192 #define BM_REQUEST_TYPE (0xa1) 193 #define B_NOTIFICATION (0x20) 194 #define W_VALUE (0x0) 195 #define W_INDEX (0x2) 196 #define W_LENGTH (0x2) 197 198 #define B_OVERRUN (0x1<<6) 199 #define B_PARITY (0x1<<5) 200 #define B_FRAMING (0x1<<4) 201 #define B_RING_SIGNAL (0x1<<3) 202 #define B_BREAK (0x1<<2) 203 #define B_TX_CARRIER (0x1<<1) 204 #define B_RX_CARRIER (0x1<<0) 205 206 struct hso_serial_state_notification { 207 u8 bmRequestType; 208 u8 bNotification; 209 u16 wValue; 210 u16 wIndex; 211 u16 wLength; 212 u16 UART_state_bitmap; 213 } __attribute__((packed)); 214 215 struct hso_tiocmget { 216 struct mutex mutex; 217 wait_queue_head_t waitq; 218 int intr_completed; 219 struct usb_endpoint_descriptor *endp; 220 struct urb *urb; 221 struct hso_serial_state_notification serial_state_notification; 222 u16 prev_UART_state_bitmap; 223 struct uart_icount icount; 224 }; 225 226 227 struct hso_serial { 228 struct hso_device *parent; 229 int magic; 230 u8 minor; 231 232 struct hso_shared_int *shared_int; 233 234 /* rx/tx urb could be either a bulk urb or a control urb depending 235 on which serial port it is used on. */ 236 struct urb *rx_urb[MAX_RX_URBS]; 237 u8 num_rx_urbs; 238 u8 *rx_data[MAX_RX_URBS]; 239 u16 rx_data_length; /* should contain allocated length */ 240 241 struct urb *tx_urb; 242 u8 *tx_data; 243 u8 *tx_buffer; 244 u16 tx_data_length; /* should contain allocated length */ 245 u16 tx_data_count; 246 u16 tx_buffer_count; 247 struct usb_ctrlrequest ctrl_req_tx; 248 struct usb_ctrlrequest ctrl_req_rx; 249 250 struct usb_endpoint_descriptor *in_endp; 251 struct usb_endpoint_descriptor *out_endp; 252 253 enum rx_ctrl_state rx_state; 254 u8 rts_state; 255 u8 dtr_state; 256 unsigned tx_urb_used:1; 257 258 /* from usb_serial_port */ 259 struct tty_struct *tty; 260 int open_count; 261 spinlock_t serial_lock; 262 263 int (*write_data) (struct hso_serial *serial); 264 struct hso_tiocmget *tiocmget; 265 /* Hacks required to get flow control 266 * working on the serial receive buffers 267 * so as not to drop characters on the floor. 268 */ 269 int curr_rx_urb_idx; 270 u16 curr_rx_urb_offset; 271 u8 rx_urb_filled[MAX_RX_URBS]; 272 struct tasklet_struct unthrottle_tasklet; 273 struct work_struct retry_unthrottle_workqueue; 274 }; 275 276 struct hso_device { 277 union { 278 struct hso_serial *dev_serial; 279 struct hso_net *dev_net; 280 } port_data; 281 282 u32 port_spec; 283 284 u8 is_active; 285 u8 usb_gone; 286 struct work_struct async_get_intf; 287 struct work_struct async_put_intf; 288 289 struct usb_device *usb; 290 struct usb_interface *interface; 291 292 struct device *dev; 293 struct kref ref; 294 struct mutex mutex; 295 }; 296 297 /* Type of interface */ 298 #define HSO_INTF_MASK 0xFF00 299 #define HSO_INTF_MUX 0x0100 300 #define HSO_INTF_BULK 0x0200 301 302 /* Type of port */ 303 #define HSO_PORT_MASK 0xFF 304 #define HSO_PORT_NO_PORT 0x0 305 #define HSO_PORT_CONTROL 0x1 306 #define HSO_PORT_APP 0x2 307 #define HSO_PORT_GPS 0x3 308 #define HSO_PORT_PCSC 0x4 309 #define HSO_PORT_APP2 0x5 310 #define HSO_PORT_GPS_CONTROL 0x6 311 #define HSO_PORT_MSD 0x7 312 #define HSO_PORT_VOICE 0x8 313 #define HSO_PORT_DIAG2 0x9 314 #define HSO_PORT_DIAG 0x10 315 #define HSO_PORT_MODEM 0x11 316 #define HSO_PORT_NETWORK 0x12 317 318 /* Additional device info */ 319 #define HSO_INFO_MASK 0xFF000000 320 #define HSO_INFO_CRC_BUG 0x01000000 321 322 /*****************************************************************************/ 323 /* Prototypes */ 324 /*****************************************************************************/ 325 /* Serial driver functions */ 326 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 327 unsigned int set, unsigned int clear); 328 static void ctrl_callback(struct urb *urb); 329 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 330 static void hso_kick_transmit(struct hso_serial *serial); 331 /* Helper functions */ 332 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 333 struct usb_device *usb, gfp_t gfp); 334 static void log_usb_status(int status, const char *function); 335 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 336 int type, int dir); 337 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 338 static void hso_free_interface(struct usb_interface *intf); 339 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 340 static int hso_stop_serial_device(struct hso_device *hso_dev); 341 static int hso_start_net_device(struct hso_device *hso_dev); 342 static void hso_free_shared_int(struct hso_shared_int *shared_int); 343 static int hso_stop_net_device(struct hso_device *hso_dev); 344 static void hso_serial_ref_free(struct kref *ref); 345 static void hso_std_serial_read_bulk_callback(struct urb *urb); 346 static int hso_mux_serial_read(struct hso_serial *serial); 347 static void async_get_intf(struct work_struct *data); 348 static void async_put_intf(struct work_struct *data); 349 static int hso_put_activity(struct hso_device *hso_dev); 350 static int hso_get_activity(struct hso_device *hso_dev); 351 static void tiocmget_intr_callback(struct urb *urb); 352 /*****************************************************************************/ 353 /* Helping functions */ 354 /*****************************************************************************/ 355 356 /* #define DEBUG */ 357 358 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 359 { 360 return hso_dev->port_data.dev_net; 361 } 362 363 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 364 { 365 return hso_dev->port_data.dev_serial; 366 } 367 368 /* Debugging functions */ 369 #ifdef DEBUG 370 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 371 unsigned int len) 372 { 373 static char name[255]; 374 375 sprintf(name, "hso[%d:%s]", line_count, func_name); 376 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 377 } 378 379 #define DUMP(buf_, len_) \ 380 dbg_dump(__LINE__, __func__, buf_, len_) 381 382 #define DUMP1(buf_, len_) \ 383 do { \ 384 if (0x01 & debug) \ 385 DUMP(buf_, len_); \ 386 } while (0) 387 #else 388 #define DUMP(buf_, len_) 389 #define DUMP1(buf_, len_) 390 #endif 391 392 /* module parameters */ 393 static int debug; 394 static int tty_major; 395 static int disable_net; 396 397 /* driver info */ 398 static const char driver_name[] = "hso"; 399 static const char tty_filename[] = "ttyHS"; 400 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; 401 /* the usb driver itself (registered in hso_init) */ 402 static struct usb_driver hso_driver; 403 /* serial structures */ 404 static struct tty_driver *tty_drv; 405 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 406 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 407 static spinlock_t serial_table_lock; 408 409 static const s32 default_port_spec[] = { 410 HSO_INTF_MUX | HSO_PORT_NETWORK, 411 HSO_INTF_BULK | HSO_PORT_DIAG, 412 HSO_INTF_BULK | HSO_PORT_MODEM, 413 0 414 }; 415 416 static const s32 icon321_port_spec[] = { 417 HSO_INTF_MUX | HSO_PORT_NETWORK, 418 HSO_INTF_BULK | HSO_PORT_DIAG2, 419 HSO_INTF_BULK | HSO_PORT_MODEM, 420 HSO_INTF_BULK | HSO_PORT_DIAG, 421 0 422 }; 423 424 #define default_port_device(vendor, product) \ 425 USB_DEVICE(vendor, product), \ 426 .driver_info = (kernel_ulong_t)default_port_spec 427 428 #define icon321_port_device(vendor, product) \ 429 USB_DEVICE(vendor, product), \ 430 .driver_info = (kernel_ulong_t)icon321_port_spec 431 432 /* list of devices we support */ 433 static const struct usb_device_id hso_ids[] = { 434 {default_port_device(0x0af0, 0x6711)}, 435 {default_port_device(0x0af0, 0x6731)}, 436 {default_port_device(0x0af0, 0x6751)}, 437 {default_port_device(0x0af0, 0x6771)}, 438 {default_port_device(0x0af0, 0x6791)}, 439 {default_port_device(0x0af0, 0x6811)}, 440 {default_port_device(0x0af0, 0x6911)}, 441 {default_port_device(0x0af0, 0x6951)}, 442 {default_port_device(0x0af0, 0x6971)}, 443 {default_port_device(0x0af0, 0x7011)}, 444 {default_port_device(0x0af0, 0x7031)}, 445 {default_port_device(0x0af0, 0x7051)}, 446 {default_port_device(0x0af0, 0x7071)}, 447 {default_port_device(0x0af0, 0x7111)}, 448 {default_port_device(0x0af0, 0x7211)}, 449 {default_port_device(0x0af0, 0x7251)}, 450 {default_port_device(0x0af0, 0x7271)}, 451 {default_port_device(0x0af0, 0x7311)}, 452 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 453 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 454 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 455 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 456 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 457 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 458 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 459 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 460 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 461 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7701)}, 463 {USB_DEVICE(0x0af0, 0x7801)}, 464 {USB_DEVICE(0x0af0, 0x7901)}, 465 {USB_DEVICE(0x0af0, 0x7361)}, 466 {USB_DEVICE(0x0af0, 0xd057)}, 467 {USB_DEVICE(0x0af0, 0xd055)}, 468 {} 469 }; 470 MODULE_DEVICE_TABLE(usb, hso_ids); 471 472 /* Sysfs attribute */ 473 static ssize_t hso_sysfs_show_porttype(struct device *dev, 474 struct device_attribute *attr, 475 char *buf) 476 { 477 struct hso_device *hso_dev = dev->driver_data; 478 char *port_name; 479 480 if (!hso_dev) 481 return 0; 482 483 switch (hso_dev->port_spec & HSO_PORT_MASK) { 484 case HSO_PORT_CONTROL: 485 port_name = "Control"; 486 break; 487 case HSO_PORT_APP: 488 port_name = "Application"; 489 break; 490 case HSO_PORT_APP2: 491 port_name = "Application2"; 492 break; 493 case HSO_PORT_GPS: 494 port_name = "GPS"; 495 break; 496 case HSO_PORT_GPS_CONTROL: 497 port_name = "GPS Control"; 498 break; 499 case HSO_PORT_PCSC: 500 port_name = "PCSC"; 501 break; 502 case HSO_PORT_DIAG: 503 port_name = "Diagnostic"; 504 break; 505 case HSO_PORT_DIAG2: 506 port_name = "Diagnostic2"; 507 break; 508 case HSO_PORT_MODEM: 509 port_name = "Modem"; 510 break; 511 case HSO_PORT_NETWORK: 512 port_name = "Network"; 513 break; 514 default: 515 port_name = "Unknown"; 516 break; 517 } 518 519 return sprintf(buf, "%s\n", port_name); 520 } 521 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 522 523 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 524 { 525 int idx; 526 527 for (idx = 0; idx < serial->num_rx_urbs; idx++) 528 if (serial->rx_urb[idx] == urb) 529 return idx; 530 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 531 return -1; 532 } 533 534 /* converts mux value to a port spec value */ 535 static u32 hso_mux_to_port(int mux) 536 { 537 u32 result; 538 539 switch (mux) { 540 case 0x1: 541 result = HSO_PORT_CONTROL; 542 break; 543 case 0x2: 544 result = HSO_PORT_APP; 545 break; 546 case 0x4: 547 result = HSO_PORT_PCSC; 548 break; 549 case 0x8: 550 result = HSO_PORT_GPS; 551 break; 552 case 0x10: 553 result = HSO_PORT_APP2; 554 break; 555 default: 556 result = HSO_PORT_NO_PORT; 557 } 558 return result; 559 } 560 561 /* converts port spec value to a mux value */ 562 static u32 hso_port_to_mux(int port) 563 { 564 u32 result; 565 566 switch (port & HSO_PORT_MASK) { 567 case HSO_PORT_CONTROL: 568 result = 0x0; 569 break; 570 case HSO_PORT_APP: 571 result = 0x1; 572 break; 573 case HSO_PORT_PCSC: 574 result = 0x2; 575 break; 576 case HSO_PORT_GPS: 577 result = 0x3; 578 break; 579 case HSO_PORT_APP2: 580 result = 0x4; 581 break; 582 default: 583 result = 0x0; 584 } 585 return result; 586 } 587 588 static struct hso_serial *get_serial_by_shared_int_and_type( 589 struct hso_shared_int *shared_int, 590 int mux) 591 { 592 int i, port; 593 594 port = hso_mux_to_port(mux); 595 596 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 597 if (serial_table[i] 598 && (dev2ser(serial_table[i])->shared_int == shared_int) 599 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 600 return dev2ser(serial_table[i]); 601 } 602 } 603 604 return NULL; 605 } 606 607 static struct hso_serial *get_serial_by_index(unsigned index) 608 { 609 struct hso_serial *serial = NULL; 610 unsigned long flags; 611 612 spin_lock_irqsave(&serial_table_lock, flags); 613 if (serial_table[index]) 614 serial = dev2ser(serial_table[index]); 615 spin_unlock_irqrestore(&serial_table_lock, flags); 616 617 return serial; 618 } 619 620 static int get_free_serial_index(void) 621 { 622 int index; 623 unsigned long flags; 624 625 spin_lock_irqsave(&serial_table_lock, flags); 626 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 627 if (serial_table[index] == NULL) { 628 spin_unlock_irqrestore(&serial_table_lock, flags); 629 return index; 630 } 631 } 632 spin_unlock_irqrestore(&serial_table_lock, flags); 633 634 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 635 return -1; 636 } 637 638 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 639 { 640 unsigned long flags; 641 642 spin_lock_irqsave(&serial_table_lock, flags); 643 if (serial) 644 serial_table[index] = serial->parent; 645 else 646 serial_table[index] = NULL; 647 spin_unlock_irqrestore(&serial_table_lock, flags); 648 } 649 650 /* log a meaningful explanation of an USB status */ 651 static void log_usb_status(int status, const char *function) 652 { 653 char *explanation; 654 655 switch (status) { 656 case -ENODEV: 657 explanation = "no device"; 658 break; 659 case -ENOENT: 660 explanation = "endpoint not enabled"; 661 break; 662 case -EPIPE: 663 explanation = "endpoint stalled"; 664 break; 665 case -ENOSPC: 666 explanation = "not enough bandwidth"; 667 break; 668 case -ESHUTDOWN: 669 explanation = "device disabled"; 670 break; 671 case -EHOSTUNREACH: 672 explanation = "device suspended"; 673 break; 674 case -EINVAL: 675 case -EAGAIN: 676 case -EFBIG: 677 case -EMSGSIZE: 678 explanation = "internal error"; 679 break; 680 default: 681 explanation = "unknown status"; 682 break; 683 } 684 D1("%s: received USB status - %s (%d)", function, explanation, status); 685 } 686 687 /* Network interface functions */ 688 689 /* called when net interface is brought up by ifconfig */ 690 static int hso_net_open(struct net_device *net) 691 { 692 struct hso_net *odev = netdev_priv(net); 693 unsigned long flags = 0; 694 695 if (!odev) { 696 dev_err(&net->dev, "No net device !\n"); 697 return -ENODEV; 698 } 699 700 odev->skb_tx_buf = NULL; 701 702 /* setup environment */ 703 spin_lock_irqsave(&odev->net_lock, flags); 704 odev->rx_parse_state = WAIT_IP; 705 odev->rx_buf_size = 0; 706 odev->rx_buf_missing = sizeof(struct iphdr); 707 spin_unlock_irqrestore(&odev->net_lock, flags); 708 709 /* We are up and running. */ 710 set_bit(HSO_NET_RUNNING, &odev->flags); 711 hso_start_net_device(odev->parent); 712 713 /* Tell the kernel we are ready to start receiving from it */ 714 netif_start_queue(net); 715 716 return 0; 717 } 718 719 /* called when interface is brought down by ifconfig */ 720 static int hso_net_close(struct net_device *net) 721 { 722 struct hso_net *odev = netdev_priv(net); 723 724 /* we don't need the queue anymore */ 725 netif_stop_queue(net); 726 /* no longer running */ 727 clear_bit(HSO_NET_RUNNING, &odev->flags); 728 729 hso_stop_net_device(odev->parent); 730 731 /* done */ 732 return 0; 733 } 734 735 /* USB tells is xmit done, we should start the netqueue again */ 736 static void write_bulk_callback(struct urb *urb) 737 { 738 struct hso_net *odev = urb->context; 739 int status = urb->status; 740 741 /* Sanity check */ 742 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 743 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 744 return; 745 } 746 747 /* Do we still have a valid kernel network device? */ 748 if (!netif_device_present(odev->net)) { 749 dev_err(&urb->dev->dev, "%s: net device not present\n", 750 __func__); 751 return; 752 } 753 754 /* log status, but don't act on it, we don't need to resubmit anything 755 * anyhow */ 756 if (status) 757 log_usb_status(status, __func__); 758 759 hso_put_activity(odev->parent); 760 761 /* Tell the network interface we are ready for another frame */ 762 netif_wake_queue(odev->net); 763 } 764 765 /* called by kernel when we need to transmit a packet */ 766 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) 767 { 768 struct hso_net *odev = netdev_priv(net); 769 int result; 770 771 /* Tell the kernel, "No more frames 'til we are done with this one." */ 772 netif_stop_queue(net); 773 if (hso_get_activity(odev->parent) == -EAGAIN) { 774 odev->skb_tx_buf = skb; 775 return 0; 776 } 777 778 /* log if asked */ 779 DUMP1(skb->data, skb->len); 780 /* Copy it from kernel memory to OUR memory */ 781 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 782 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 783 784 /* Fill in the URB for shipping it out. */ 785 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 786 odev->parent->usb, 787 usb_sndbulkpipe(odev->parent->usb, 788 odev->out_endp-> 789 bEndpointAddress & 0x7F), 790 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 791 odev); 792 793 /* Deal with the Zero Length packet problem, I hope */ 794 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 795 796 /* Send the URB on its merry way. */ 797 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 798 if (result) { 799 dev_warn(&odev->parent->interface->dev, 800 "failed mux_bulk_tx_urb %d", result); 801 net->stats.tx_errors++; 802 netif_start_queue(net); 803 } else { 804 net->stats.tx_packets++; 805 net->stats.tx_bytes += skb->len; 806 /* And tell the kernel when the last transmit started. */ 807 net->trans_start = jiffies; 808 } 809 dev_kfree_skb(skb); 810 /* we're done */ 811 return result; 812 } 813 814 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 815 { 816 struct hso_net *odev = netdev_priv(net); 817 818 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 819 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 820 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 821 } 822 823 static struct ethtool_ops ops = { 824 .get_drvinfo = hso_get_drvinfo, 825 .get_link = ethtool_op_get_link 826 }; 827 828 /* called when a packet did not ack after watchdogtimeout */ 829 static void hso_net_tx_timeout(struct net_device *net) 830 { 831 struct hso_net *odev = netdev_priv(net); 832 833 if (!odev) 834 return; 835 836 /* Tell syslog we are hosed. */ 837 dev_warn(&net->dev, "Tx timed out.\n"); 838 839 /* Tear the waiting frame off the list */ 840 if (odev->mux_bulk_tx_urb 841 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 842 usb_unlink_urb(odev->mux_bulk_tx_urb); 843 844 /* Update statistics */ 845 net->stats.tx_errors++; 846 } 847 848 /* make a real packet from the received USB buffer */ 849 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 850 unsigned int count, unsigned char is_eop) 851 { 852 unsigned short temp_bytes; 853 unsigned short buffer_offset = 0; 854 unsigned short frame_len; 855 unsigned char *tmp_rx_buf; 856 857 /* log if needed */ 858 D1("Rx %d bytes", count); 859 DUMP(ip_pkt, min(128, (int)count)); 860 861 while (count) { 862 switch (odev->rx_parse_state) { 863 case WAIT_IP: 864 /* waiting for IP header. */ 865 /* wanted bytes - size of ip header */ 866 temp_bytes = 867 (count < 868 odev->rx_buf_missing) ? count : odev-> 869 rx_buf_missing; 870 871 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 872 odev->rx_buf_size, ip_pkt + buffer_offset, 873 temp_bytes); 874 875 odev->rx_buf_size += temp_bytes; 876 buffer_offset += temp_bytes; 877 odev->rx_buf_missing -= temp_bytes; 878 count -= temp_bytes; 879 880 if (!odev->rx_buf_missing) { 881 /* header is complete allocate an sk_buffer and 882 * continue to WAIT_DATA */ 883 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 884 885 if ((frame_len > DEFAULT_MRU) || 886 (frame_len < sizeof(struct iphdr))) { 887 dev_err(&odev->net->dev, 888 "Invalid frame (%d) length\n", 889 frame_len); 890 odev->rx_parse_state = WAIT_SYNC; 891 continue; 892 } 893 /* Allocate an sk_buff */ 894 odev->skb_rx_buf = dev_alloc_skb(frame_len); 895 if (!odev->skb_rx_buf) { 896 /* We got no receive buffer. */ 897 D1("could not allocate memory"); 898 odev->rx_parse_state = WAIT_SYNC; 899 return; 900 } 901 /* Here's where it came from */ 902 odev->skb_rx_buf->dev = odev->net; 903 904 /* Copy what we got so far. make room for iphdr 905 * after tail. */ 906 tmp_rx_buf = 907 skb_put(odev->skb_rx_buf, 908 sizeof(struct iphdr)); 909 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 910 sizeof(struct iphdr)); 911 912 /* ETH_HLEN */ 913 odev->rx_buf_size = sizeof(struct iphdr); 914 915 /* Filip actually use .tot_len */ 916 odev->rx_buf_missing = 917 frame_len - sizeof(struct iphdr); 918 odev->rx_parse_state = WAIT_DATA; 919 } 920 break; 921 922 case WAIT_DATA: 923 temp_bytes = (count < odev->rx_buf_missing) 924 ? count : odev->rx_buf_missing; 925 926 /* Copy the rest of the bytes that are left in the 927 * buffer into the waiting sk_buf. */ 928 /* Make room for temp_bytes after tail. */ 929 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 930 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 931 932 odev->rx_buf_missing -= temp_bytes; 933 count -= temp_bytes; 934 buffer_offset += temp_bytes; 935 odev->rx_buf_size += temp_bytes; 936 if (!odev->rx_buf_missing) { 937 /* Packet is complete. Inject into stack. */ 938 /* We have IP packet here */ 939 odev->skb_rx_buf->protocol = 940 __constant_htons(ETH_P_IP); 941 /* don't check it */ 942 odev->skb_rx_buf->ip_summed = 943 CHECKSUM_UNNECESSARY; 944 945 skb_reset_mac_header(odev->skb_rx_buf); 946 947 /* Ship it off to the kernel */ 948 netif_rx(odev->skb_rx_buf); 949 /* No longer our buffer. */ 950 odev->skb_rx_buf = NULL; 951 952 /* update out statistics */ 953 odev->net->stats.rx_packets++; 954 955 odev->net->stats.rx_bytes += odev->rx_buf_size; 956 957 odev->rx_buf_size = 0; 958 odev->rx_buf_missing = sizeof(struct iphdr); 959 odev->rx_parse_state = WAIT_IP; 960 } 961 break; 962 963 case WAIT_SYNC: 964 D1(" W_S"); 965 count = 0; 966 break; 967 default: 968 D1(" "); 969 count--; 970 break; 971 } 972 } 973 974 /* Recovery mechanism for WAIT_SYNC state. */ 975 if (is_eop) { 976 if (odev->rx_parse_state == WAIT_SYNC) { 977 odev->rx_parse_state = WAIT_IP; 978 odev->rx_buf_size = 0; 979 odev->rx_buf_missing = sizeof(struct iphdr); 980 } 981 } 982 } 983 984 /* Moving data from usb to kernel (in interrupt state) */ 985 static void read_bulk_callback(struct urb *urb) 986 { 987 struct hso_net *odev = urb->context; 988 struct net_device *net; 989 int result; 990 int status = urb->status; 991 992 /* is al ok? (Filip: Who's Al ?) */ 993 if (status) { 994 log_usb_status(status, __func__); 995 return; 996 } 997 998 /* Sanity check */ 999 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1000 D1("BULK IN callback but driver is not active!"); 1001 return; 1002 } 1003 usb_mark_last_busy(urb->dev); 1004 1005 net = odev->net; 1006 1007 if (!netif_device_present(net)) { 1008 /* Somebody killed our network interface... */ 1009 return; 1010 } 1011 1012 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1013 u32 rest; 1014 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1015 rest = urb->actual_length % odev->in_endp->wMaxPacketSize; 1016 if (((rest == 5) || (rest == 6)) 1017 && !memcmp(((u8 *) urb->transfer_buffer) + 1018 urb->actual_length - 4, crc_check, 4)) { 1019 urb->actual_length -= 4; 1020 } 1021 } 1022 1023 /* do we even have a packet? */ 1024 if (urb->actual_length) { 1025 /* Handle the IP stream, add header and push it onto network 1026 * stack if the packet is complete. */ 1027 spin_lock(&odev->net_lock); 1028 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1029 (urb->transfer_buffer_length > 1030 urb->actual_length) ? 1 : 0); 1031 spin_unlock(&odev->net_lock); 1032 } 1033 1034 /* We are done with this URB, resubmit it. Prep the USB to wait for 1035 * another frame. Reuse same as received. */ 1036 usb_fill_bulk_urb(urb, 1037 odev->parent->usb, 1038 usb_rcvbulkpipe(odev->parent->usb, 1039 odev->in_endp-> 1040 bEndpointAddress & 0x7F), 1041 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1042 read_bulk_callback, odev); 1043 1044 /* Give this to the USB subsystem so it can tell us when more data 1045 * arrives. */ 1046 result = usb_submit_urb(urb, GFP_ATOMIC); 1047 if (result) 1048 dev_warn(&odev->parent->interface->dev, 1049 "%s failed submit mux_bulk_rx_urb %d", __func__, 1050 result); 1051 } 1052 1053 /* Serial driver functions */ 1054 1055 static void hso_init_termios(struct ktermios *termios) 1056 { 1057 /* 1058 * The default requirements for this device are: 1059 */ 1060 termios->c_iflag &= 1061 ~(IGNBRK /* disable ignore break */ 1062 | BRKINT /* disable break causes interrupt */ 1063 | PARMRK /* disable mark parity errors */ 1064 | ISTRIP /* disable clear high bit of input characters */ 1065 | INLCR /* disable translate NL to CR */ 1066 | IGNCR /* disable ignore CR */ 1067 | ICRNL /* disable translate CR to NL */ 1068 | IXON); /* disable enable XON/XOFF flow control */ 1069 1070 /* disable postprocess output characters */ 1071 termios->c_oflag &= ~OPOST; 1072 1073 termios->c_lflag &= 1074 ~(ECHO /* disable echo input characters */ 1075 | ECHONL /* disable echo new line */ 1076 | ICANON /* disable erase, kill, werase, and rprnt 1077 special characters */ 1078 | ISIG /* disable interrupt, quit, and suspend special 1079 characters */ 1080 | IEXTEN); /* disable non-POSIX special characters */ 1081 1082 termios->c_cflag &= 1083 ~(CSIZE /* no size */ 1084 | PARENB /* disable parity bit */ 1085 | CBAUD /* clear current baud rate */ 1086 | CBAUDEX); /* clear current buad rate */ 1087 1088 termios->c_cflag |= CS8; /* character size 8 bits */ 1089 1090 /* baud rate 115200 */ 1091 tty_termios_encode_baud_rate(termios, 115200, 115200); 1092 } 1093 1094 static void _hso_serial_set_termios(struct tty_struct *tty, 1095 struct ktermios *old) 1096 { 1097 struct hso_serial *serial = get_serial_by_tty(tty); 1098 struct ktermios *termios; 1099 1100 if (!serial) { 1101 printk(KERN_ERR "%s: no tty structures", __func__); 1102 return; 1103 } 1104 1105 D4("port %d", serial->minor); 1106 1107 /* 1108 * Fix up unsupported bits 1109 */ 1110 termios = tty->termios; 1111 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1112 1113 termios->c_cflag &= 1114 ~(CSIZE /* no size */ 1115 | PARENB /* disable parity bit */ 1116 | CBAUD /* clear current baud rate */ 1117 | CBAUDEX); /* clear current buad rate */ 1118 1119 termios->c_cflag |= CS8; /* character size 8 bits */ 1120 1121 /* baud rate 115200 */ 1122 tty_encode_baud_rate(tty, 115200, 115200); 1123 } 1124 1125 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1126 { 1127 int result; 1128 #ifdef CONFIG_HSO_AUTOPM 1129 usb_mark_last_busy(urb->dev); 1130 #endif 1131 /* We are done with this URB, resubmit it. Prep the USB to wait for 1132 * another frame */ 1133 usb_fill_bulk_urb(urb, serial->parent->usb, 1134 usb_rcvbulkpipe(serial->parent->usb, 1135 serial->in_endp-> 1136 bEndpointAddress & 0x7F), 1137 urb->transfer_buffer, serial->rx_data_length, 1138 hso_std_serial_read_bulk_callback, serial); 1139 /* Give this to the USB subsystem so it can tell us when more data 1140 * arrives. */ 1141 result = usb_submit_urb(urb, GFP_ATOMIC); 1142 if (result) { 1143 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1144 __func__, result); 1145 } 1146 } 1147 1148 1149 1150 1151 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1152 { 1153 int count; 1154 struct urb *curr_urb; 1155 1156 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1157 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1158 count = put_rxbuf_data(curr_urb, serial); 1159 if (count == -1) 1160 return; 1161 if (count == 0) { 1162 serial->curr_rx_urb_idx++; 1163 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1164 serial->curr_rx_urb_idx = 0; 1165 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1166 } 1167 } 1168 } 1169 1170 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1171 { 1172 int count = 0; 1173 struct urb *urb; 1174 1175 urb = serial->rx_urb[0]; 1176 if (serial->open_count > 0) { 1177 count = put_rxbuf_data(urb, serial); 1178 if (count == -1) 1179 return; 1180 } 1181 /* Re issue a read as long as we receive data. */ 1182 1183 if (count == 0 && ((urb->actual_length != 0) || 1184 (serial->rx_state == RX_PENDING))) { 1185 serial->rx_state = RX_SENT; 1186 hso_mux_serial_read(serial); 1187 } else 1188 serial->rx_state = RX_IDLE; 1189 } 1190 1191 1192 /* read callback for Diag and CS port */ 1193 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1194 { 1195 struct hso_serial *serial = urb->context; 1196 int status = urb->status; 1197 1198 /* sanity check */ 1199 if (!serial) { 1200 D1("serial == NULL"); 1201 return; 1202 } else if (status) { 1203 log_usb_status(status, __func__); 1204 return; 1205 } 1206 1207 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1208 D1("Actual length = %d\n", urb->actual_length); 1209 DUMP1(urb->transfer_buffer, urb->actual_length); 1210 1211 /* Anyone listening? */ 1212 if (serial->open_count == 0) 1213 return; 1214 1215 if (status == 0) { 1216 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1217 u32 rest; 1218 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1219 rest = 1220 urb->actual_length % 1221 serial->in_endp->wMaxPacketSize; 1222 if (((rest == 5) || (rest == 6)) 1223 && !memcmp(((u8 *) urb->transfer_buffer) + 1224 urb->actual_length - 4, crc_check, 4)) { 1225 urb->actual_length -= 4; 1226 } 1227 } 1228 /* Valid data, handle RX data */ 1229 spin_lock(&serial->serial_lock); 1230 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1231 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1232 spin_unlock(&serial->serial_lock); 1233 } else if (status == -ENOENT || status == -ECONNRESET) { 1234 /* Unlinked - check for throttled port. */ 1235 D2("Port %d, successfully unlinked urb", serial->minor); 1236 spin_lock(&serial->serial_lock); 1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1238 hso_resubmit_rx_bulk_urb(serial, urb); 1239 spin_unlock(&serial->serial_lock); 1240 } else { 1241 D2("Port %d, status = %d for read urb", serial->minor, status); 1242 return; 1243 } 1244 } 1245 1246 /* 1247 * This needs to be a tasklet otherwise we will 1248 * end up recursively calling this function. 1249 */ 1250 void hso_unthrottle_tasklet(struct hso_serial *serial) 1251 { 1252 unsigned long flags; 1253 1254 spin_lock_irqsave(&serial->serial_lock, flags); 1255 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1256 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1257 else 1258 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1259 spin_unlock_irqrestore(&serial->serial_lock, flags); 1260 } 1261 1262 static void hso_unthrottle(struct tty_struct *tty) 1263 { 1264 struct hso_serial *serial = get_serial_by_tty(tty); 1265 1266 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1267 } 1268 1269 void hso_unthrottle_workfunc(struct work_struct *work) 1270 { 1271 struct hso_serial *serial = 1272 container_of(work, struct hso_serial, 1273 retry_unthrottle_workqueue); 1274 hso_unthrottle_tasklet(serial); 1275 } 1276 1277 /* open the requested serial port */ 1278 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1279 { 1280 struct hso_serial *serial = get_serial_by_index(tty->index); 1281 int result; 1282 1283 /* sanity check */ 1284 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1285 WARN_ON(1); 1286 tty->driver_data = NULL; 1287 D1("Failed to open port"); 1288 return -ENODEV; 1289 } 1290 1291 mutex_lock(&serial->parent->mutex); 1292 result = usb_autopm_get_interface(serial->parent->interface); 1293 if (result < 0) 1294 goto err_out; 1295 1296 D1("Opening %d", serial->minor); 1297 kref_get(&serial->parent->ref); 1298 1299 /* setup */ 1300 spin_lock_irq(&serial->serial_lock); 1301 tty->driver_data = serial; 1302 tty_kref_put(serial->tty); 1303 serial->tty = tty_kref_get(tty); 1304 spin_unlock_irq(&serial->serial_lock); 1305 1306 /* check for port already opened, if not set the termios */ 1307 serial->open_count++; 1308 if (serial->open_count == 1) { 1309 tty->low_latency = 1; 1310 serial->rx_state = RX_IDLE; 1311 /* Force default termio settings */ 1312 _hso_serial_set_termios(tty, NULL); 1313 tasklet_init(&serial->unthrottle_tasklet, 1314 (void (*)(unsigned long))hso_unthrottle_tasklet, 1315 (unsigned long)serial); 1316 INIT_WORK(&serial->retry_unthrottle_workqueue, 1317 hso_unthrottle_workfunc); 1318 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1319 if (result) { 1320 hso_stop_serial_device(serial->parent); 1321 serial->open_count--; 1322 kref_put(&serial->parent->ref, hso_serial_ref_free); 1323 } 1324 } else { 1325 D1("Port was already open"); 1326 } 1327 1328 usb_autopm_put_interface(serial->parent->interface); 1329 1330 /* done */ 1331 if (result) 1332 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1333 err_out: 1334 mutex_unlock(&serial->parent->mutex); 1335 return result; 1336 } 1337 1338 /* close the requested serial port */ 1339 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1340 { 1341 struct hso_serial *serial = tty->driver_data; 1342 u8 usb_gone; 1343 1344 D1("Closing serial port"); 1345 1346 /* Open failed, no close cleanup required */ 1347 if (serial == NULL) 1348 return; 1349 1350 mutex_lock(&serial->parent->mutex); 1351 usb_gone = serial->parent->usb_gone; 1352 1353 if (!usb_gone) 1354 usb_autopm_get_interface(serial->parent->interface); 1355 1356 /* reset the rts and dtr */ 1357 /* do the actual close */ 1358 serial->open_count--; 1359 kref_put(&serial->parent->ref, hso_serial_ref_free); 1360 if (serial->open_count <= 0) { 1361 serial->open_count = 0; 1362 spin_lock_irq(&serial->serial_lock); 1363 if (serial->tty == tty) { 1364 serial->tty->driver_data = NULL; 1365 serial->tty = NULL; 1366 tty_kref_put(tty); 1367 } 1368 spin_unlock_irq(&serial->serial_lock); 1369 if (!usb_gone) 1370 hso_stop_serial_device(serial->parent); 1371 tasklet_kill(&serial->unthrottle_tasklet); 1372 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1373 } 1374 1375 if (!usb_gone) 1376 usb_autopm_put_interface(serial->parent->interface); 1377 1378 mutex_unlock(&serial->parent->mutex); 1379 } 1380 1381 /* close the requested serial port */ 1382 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1383 int count) 1384 { 1385 struct hso_serial *serial = get_serial_by_tty(tty); 1386 int space, tx_bytes; 1387 unsigned long flags; 1388 1389 /* sanity check */ 1390 if (serial == NULL) { 1391 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1392 return -ENODEV; 1393 } 1394 1395 spin_lock_irqsave(&serial->serial_lock, flags); 1396 1397 space = serial->tx_data_length - serial->tx_buffer_count; 1398 tx_bytes = (count < space) ? count : space; 1399 1400 if (!tx_bytes) 1401 goto out; 1402 1403 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1404 serial->tx_buffer_count += tx_bytes; 1405 1406 out: 1407 spin_unlock_irqrestore(&serial->serial_lock, flags); 1408 1409 hso_kick_transmit(serial); 1410 /* done */ 1411 return tx_bytes; 1412 } 1413 1414 /* how much room is there for writing */ 1415 static int hso_serial_write_room(struct tty_struct *tty) 1416 { 1417 struct hso_serial *serial = get_serial_by_tty(tty); 1418 int room; 1419 unsigned long flags; 1420 1421 spin_lock_irqsave(&serial->serial_lock, flags); 1422 room = serial->tx_data_length - serial->tx_buffer_count; 1423 spin_unlock_irqrestore(&serial->serial_lock, flags); 1424 1425 /* return free room */ 1426 return room; 1427 } 1428 1429 /* setup the term */ 1430 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1431 { 1432 struct hso_serial *serial = get_serial_by_tty(tty); 1433 unsigned long flags; 1434 1435 if (old) 1436 D5("Termios called with: cflags new[%d] - old[%d]", 1437 tty->termios->c_cflag, old->c_cflag); 1438 1439 /* the actual setup */ 1440 spin_lock_irqsave(&serial->serial_lock, flags); 1441 if (serial->open_count) 1442 _hso_serial_set_termios(tty, old); 1443 else 1444 tty->termios = old; 1445 spin_unlock_irqrestore(&serial->serial_lock, flags); 1446 1447 /* done */ 1448 return; 1449 } 1450 1451 /* how many characters in the buffer */ 1452 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1453 { 1454 struct hso_serial *serial = get_serial_by_tty(tty); 1455 int chars; 1456 unsigned long flags; 1457 1458 /* sanity check */ 1459 if (serial == NULL) 1460 return 0; 1461 1462 spin_lock_irqsave(&serial->serial_lock, flags); 1463 chars = serial->tx_buffer_count; 1464 spin_unlock_irqrestore(&serial->serial_lock, flags); 1465 1466 return chars; 1467 } 1468 int tiocmget_submit_urb(struct hso_serial *serial, 1469 struct hso_tiocmget *tiocmget, 1470 struct usb_device *usb) 1471 { 1472 int result; 1473 1474 if (serial->parent->usb_gone) 1475 return -ENODEV; 1476 usb_fill_int_urb(tiocmget->urb, usb, 1477 usb_rcvintpipe(usb, 1478 tiocmget->endp-> 1479 bEndpointAddress & 0x7F), 1480 &tiocmget->serial_state_notification, 1481 sizeof(struct hso_serial_state_notification), 1482 tiocmget_intr_callback, serial, 1483 tiocmget->endp->bInterval); 1484 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1485 if (result) { 1486 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1487 result); 1488 } 1489 return result; 1490 1491 } 1492 1493 static void tiocmget_intr_callback(struct urb *urb) 1494 { 1495 struct hso_serial *serial = urb->context; 1496 struct hso_tiocmget *tiocmget; 1497 int status = urb->status; 1498 u16 UART_state_bitmap, prev_UART_state_bitmap; 1499 struct uart_icount *icount; 1500 struct hso_serial_state_notification *serial_state_notification; 1501 struct usb_device *usb; 1502 1503 /* Sanity checks */ 1504 if (!serial) 1505 return; 1506 if (status) { 1507 log_usb_status(status, __func__); 1508 return; 1509 } 1510 tiocmget = serial->tiocmget; 1511 if (!tiocmget) 1512 return; 1513 usb = serial->parent->usb; 1514 serial_state_notification = &tiocmget->serial_state_notification; 1515 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1516 serial_state_notification->bNotification != B_NOTIFICATION || 1517 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1518 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1519 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1520 dev_warn(&usb->dev, 1521 "hso received invalid serial state notification\n"); 1522 DUMP(serial_state_notification, 1523 sizeof(hso_serial_state_notifation)) 1524 } else { 1525 1526 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1527 UART_state_bitmap); 1528 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1529 icount = &tiocmget->icount; 1530 spin_lock(&serial->serial_lock); 1531 if ((UART_state_bitmap & B_OVERRUN) != 1532 (prev_UART_state_bitmap & B_OVERRUN)) 1533 icount->parity++; 1534 if ((UART_state_bitmap & B_PARITY) != 1535 (prev_UART_state_bitmap & B_PARITY)) 1536 icount->parity++; 1537 if ((UART_state_bitmap & B_FRAMING) != 1538 (prev_UART_state_bitmap & B_FRAMING)) 1539 icount->frame++; 1540 if ((UART_state_bitmap & B_RING_SIGNAL) && 1541 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1542 icount->rng++; 1543 if ((UART_state_bitmap & B_BREAK) != 1544 (prev_UART_state_bitmap & B_BREAK)) 1545 icount->brk++; 1546 if ((UART_state_bitmap & B_TX_CARRIER) != 1547 (prev_UART_state_bitmap & B_TX_CARRIER)) 1548 icount->dsr++; 1549 if ((UART_state_bitmap & B_RX_CARRIER) != 1550 (prev_UART_state_bitmap & B_RX_CARRIER)) 1551 icount->dcd++; 1552 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1553 spin_unlock(&serial->serial_lock); 1554 tiocmget->intr_completed = 1; 1555 wake_up_interruptible(&tiocmget->waitq); 1556 } 1557 memset(serial_state_notification, 0, 1558 sizeof(struct hso_serial_state_notification)); 1559 tiocmget_submit_urb(serial, 1560 tiocmget, 1561 serial->parent->usb); 1562 } 1563 1564 /* 1565 * next few functions largely stolen from drivers/serial/serial_core.c 1566 */ 1567 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1568 * - mask passed in arg for lines of interest 1569 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1570 * Caller should use TIOCGICOUNT to see which one it was 1571 */ 1572 static int 1573 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1574 { 1575 DECLARE_WAITQUEUE(wait, current); 1576 struct uart_icount cprev, cnow; 1577 struct hso_tiocmget *tiocmget; 1578 int ret; 1579 1580 tiocmget = serial->tiocmget; 1581 if (!tiocmget) 1582 return -ENOENT; 1583 /* 1584 * note the counters on entry 1585 */ 1586 spin_lock_irq(&serial->serial_lock); 1587 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1588 spin_unlock_irq(&serial->serial_lock); 1589 add_wait_queue(&tiocmget->waitq, &wait); 1590 for (;;) { 1591 spin_lock_irq(&serial->serial_lock); 1592 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1593 spin_unlock_irq(&serial->serial_lock); 1594 set_current_state(TASK_INTERRUPTIBLE); 1595 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1596 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1597 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1598 ret = 0; 1599 break; 1600 } 1601 schedule(); 1602 /* see if a signal did it */ 1603 if (signal_pending(current)) { 1604 ret = -ERESTARTSYS; 1605 break; 1606 } 1607 cprev = cnow; 1608 } 1609 current->state = TASK_RUNNING; 1610 remove_wait_queue(&tiocmget->waitq, &wait); 1611 1612 return ret; 1613 } 1614 1615 /* 1616 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1617 * Return: write counters to the user passed counter struct 1618 * NB: both 1->0 and 0->1 transitions are counted except for 1619 * RI where only 0->1 is counted. 1620 */ 1621 static int hso_get_count(struct hso_serial *serial, 1622 struct serial_icounter_struct __user *icnt) 1623 { 1624 struct serial_icounter_struct icount; 1625 struct uart_icount cnow; 1626 struct hso_tiocmget *tiocmget = serial->tiocmget; 1627 1628 if (!tiocmget) 1629 return -ENOENT; 1630 spin_lock_irq(&serial->serial_lock); 1631 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1632 spin_unlock_irq(&serial->serial_lock); 1633 1634 icount.cts = cnow.cts; 1635 icount.dsr = cnow.dsr; 1636 icount.rng = cnow.rng; 1637 icount.dcd = cnow.dcd; 1638 icount.rx = cnow.rx; 1639 icount.tx = cnow.tx; 1640 icount.frame = cnow.frame; 1641 icount.overrun = cnow.overrun; 1642 icount.parity = cnow.parity; 1643 icount.brk = cnow.brk; 1644 icount.buf_overrun = cnow.buf_overrun; 1645 1646 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1647 } 1648 1649 1650 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1651 { 1652 int retval; 1653 struct hso_serial *serial = get_serial_by_tty(tty); 1654 struct hso_tiocmget *tiocmget; 1655 u16 UART_state_bitmap; 1656 1657 /* sanity check */ 1658 if (!serial) { 1659 D1("no tty structures"); 1660 return -EINVAL; 1661 } 1662 spin_lock_irq(&serial->serial_lock); 1663 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1664 ((serial->dtr_state) ? TIOCM_DTR : 0); 1665 tiocmget = serial->tiocmget; 1666 if (tiocmget) { 1667 1668 UART_state_bitmap = le16_to_cpu( 1669 tiocmget->prev_UART_state_bitmap); 1670 if (UART_state_bitmap & B_RING_SIGNAL) 1671 retval |= TIOCM_RNG; 1672 if (UART_state_bitmap & B_RX_CARRIER) 1673 retval |= TIOCM_CD; 1674 if (UART_state_bitmap & B_TX_CARRIER) 1675 retval |= TIOCM_DSR; 1676 } 1677 spin_unlock_irq(&serial->serial_lock); 1678 return retval; 1679 } 1680 1681 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1682 unsigned int set, unsigned int clear) 1683 { 1684 int val = 0; 1685 unsigned long flags; 1686 int if_num; 1687 struct hso_serial *serial = get_serial_by_tty(tty); 1688 1689 /* sanity check */ 1690 if (!serial) { 1691 D1("no tty structures"); 1692 return -EINVAL; 1693 } 1694 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1695 1696 spin_lock_irqsave(&serial->serial_lock, flags); 1697 if (set & TIOCM_RTS) 1698 serial->rts_state = 1; 1699 if (set & TIOCM_DTR) 1700 serial->dtr_state = 1; 1701 1702 if (clear & TIOCM_RTS) 1703 serial->rts_state = 0; 1704 if (clear & TIOCM_DTR) 1705 serial->dtr_state = 0; 1706 1707 if (serial->dtr_state) 1708 val |= 0x01; 1709 if (serial->rts_state) 1710 val |= 0x02; 1711 1712 spin_unlock_irqrestore(&serial->serial_lock, flags); 1713 1714 return usb_control_msg(serial->parent->usb, 1715 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1716 0x21, val, if_num, NULL, 0, 1717 USB_CTRL_SET_TIMEOUT); 1718 } 1719 1720 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1721 unsigned int cmd, unsigned long arg) 1722 { 1723 struct hso_serial *serial = get_serial_by_tty(tty); 1724 void __user *uarg = (void __user *)arg; 1725 int ret = 0; 1726 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1727 1728 if (!serial) 1729 return -ENODEV; 1730 switch (cmd) { 1731 case TIOCMIWAIT: 1732 ret = hso_wait_modem_status(serial, arg); 1733 break; 1734 1735 case TIOCGICOUNT: 1736 ret = hso_get_count(serial, uarg); 1737 break; 1738 default: 1739 ret = -ENOIOCTLCMD; 1740 break; 1741 } 1742 return ret; 1743 } 1744 1745 1746 /* starts a transmit */ 1747 static void hso_kick_transmit(struct hso_serial *serial) 1748 { 1749 u8 *temp; 1750 unsigned long flags; 1751 int res; 1752 1753 spin_lock_irqsave(&serial->serial_lock, flags); 1754 if (!serial->tx_buffer_count) 1755 goto out; 1756 1757 if (serial->tx_urb_used) 1758 goto out; 1759 1760 /* Wakeup USB interface if necessary */ 1761 if (hso_get_activity(serial->parent) == -EAGAIN) 1762 goto out; 1763 1764 /* Switch pointers around to avoid memcpy */ 1765 temp = serial->tx_buffer; 1766 serial->tx_buffer = serial->tx_data; 1767 serial->tx_data = temp; 1768 serial->tx_data_count = serial->tx_buffer_count; 1769 serial->tx_buffer_count = 0; 1770 1771 /* If temp is set, it means we switched buffers */ 1772 if (temp && serial->write_data) { 1773 res = serial->write_data(serial); 1774 if (res >= 0) 1775 serial->tx_urb_used = 1; 1776 } 1777 out: 1778 spin_unlock_irqrestore(&serial->serial_lock, flags); 1779 } 1780 1781 /* make a request (for reading and writing data to muxed serial port) */ 1782 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1783 struct urb *ctrl_urb, 1784 struct usb_ctrlrequest *ctrl_req, 1785 u8 *ctrl_urb_data, u32 size) 1786 { 1787 int result; 1788 int pipe; 1789 1790 /* Sanity check */ 1791 if (!serial || !ctrl_urb || !ctrl_req) { 1792 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1793 return -EINVAL; 1794 } 1795 1796 /* initialize */ 1797 ctrl_req->wValue = 0; 1798 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1799 ctrl_req->wLength = cpu_to_le16(size); 1800 1801 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1802 /* Reading command */ 1803 ctrl_req->bRequestType = USB_DIR_IN | 1804 USB_TYPE_OPTION_VENDOR | 1805 USB_RECIP_INTERFACE; 1806 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1807 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1808 } else { 1809 /* Writing command */ 1810 ctrl_req->bRequestType = USB_DIR_OUT | 1811 USB_TYPE_OPTION_VENDOR | 1812 USB_RECIP_INTERFACE; 1813 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1814 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1815 } 1816 /* syslog */ 1817 D2("%s command (%02x) len: %d, port: %d", 1818 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1819 ctrl_req->bRequestType, ctrl_req->wLength, port); 1820 1821 /* Load ctrl urb */ 1822 ctrl_urb->transfer_flags = 0; 1823 usb_fill_control_urb(ctrl_urb, 1824 serial->parent->usb, 1825 pipe, 1826 (u8 *) ctrl_req, 1827 ctrl_urb_data, size, ctrl_callback, serial); 1828 /* Send it on merry way */ 1829 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1830 if (result) { 1831 dev_err(&ctrl_urb->dev->dev, 1832 "%s failed submit ctrl_urb %d type %d", __func__, 1833 result, type); 1834 return result; 1835 } 1836 1837 /* done */ 1838 return size; 1839 } 1840 1841 /* called by intr_callback when read occurs */ 1842 static int hso_mux_serial_read(struct hso_serial *serial) 1843 { 1844 if (!serial) 1845 return -EINVAL; 1846 1847 /* clean data */ 1848 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1849 /* make the request */ 1850 1851 if (serial->num_rx_urbs != 1) { 1852 dev_err(&serial->parent->interface->dev, 1853 "ERROR: mux'd reads with multiple buffers " 1854 "not possible\n"); 1855 return 0; 1856 } 1857 return mux_device_request(serial, 1858 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1859 serial->parent->port_spec & HSO_PORT_MASK, 1860 serial->rx_urb[0], 1861 &serial->ctrl_req_rx, 1862 serial->rx_data[0], serial->rx_data_length); 1863 } 1864 1865 /* used for muxed serial port callback (muxed serial read) */ 1866 static void intr_callback(struct urb *urb) 1867 { 1868 struct hso_shared_int *shared_int = urb->context; 1869 struct hso_serial *serial; 1870 unsigned char *port_req; 1871 int status = urb->status; 1872 int i; 1873 1874 usb_mark_last_busy(urb->dev); 1875 1876 /* sanity check */ 1877 if (!shared_int) 1878 return; 1879 1880 /* status check */ 1881 if (status) { 1882 log_usb_status(status, __func__); 1883 return; 1884 } 1885 D4("\n--- Got intr callback 0x%02X ---", status); 1886 1887 /* what request? */ 1888 port_req = urb->transfer_buffer; 1889 D4(" port_req = 0x%.2X\n", *port_req); 1890 /* loop over all muxed ports to find the one sending this */ 1891 for (i = 0; i < 8; i++) { 1892 /* max 8 channels on MUX */ 1893 if (*port_req & (1 << i)) { 1894 serial = get_serial_by_shared_int_and_type(shared_int, 1895 (1 << i)); 1896 if (serial != NULL) { 1897 D1("Pending read interrupt on port %d\n", i); 1898 spin_lock(&serial->serial_lock); 1899 if (serial->rx_state == RX_IDLE) { 1900 /* Setup and send a ctrl req read on 1901 * port i */ 1902 if (!serial->rx_urb_filled[0]) { 1903 serial->rx_state = RX_SENT; 1904 hso_mux_serial_read(serial); 1905 } else 1906 serial->rx_state = RX_PENDING; 1907 1908 } else { 1909 D1("Already pending a read on " 1910 "port %d\n", i); 1911 } 1912 spin_unlock(&serial->serial_lock); 1913 } 1914 } 1915 } 1916 /* Resubmit interrupt urb */ 1917 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1918 } 1919 1920 /* called for writing to muxed serial port */ 1921 static int hso_mux_serial_write_data(struct hso_serial *serial) 1922 { 1923 if (NULL == serial) 1924 return -EINVAL; 1925 1926 return mux_device_request(serial, 1927 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1928 serial->parent->port_spec & HSO_PORT_MASK, 1929 serial->tx_urb, 1930 &serial->ctrl_req_tx, 1931 serial->tx_data, serial->tx_data_count); 1932 } 1933 1934 /* write callback for Diag and CS port */ 1935 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1936 { 1937 struct hso_serial *serial = urb->context; 1938 int status = urb->status; 1939 struct tty_struct *tty; 1940 1941 /* sanity check */ 1942 if (!serial) { 1943 D1("serial == NULL"); 1944 return; 1945 } 1946 1947 spin_lock(&serial->serial_lock); 1948 serial->tx_urb_used = 0; 1949 tty = tty_kref_get(serial->tty); 1950 spin_unlock(&serial->serial_lock); 1951 if (status) { 1952 log_usb_status(status, __func__); 1953 tty_kref_put(tty); 1954 return; 1955 } 1956 hso_put_activity(serial->parent); 1957 if (tty) { 1958 tty_wakeup(tty); 1959 tty_kref_put(tty); 1960 } 1961 hso_kick_transmit(serial); 1962 1963 D1(" "); 1964 return; 1965 } 1966 1967 /* called for writing diag or CS serial port */ 1968 static int hso_std_serial_write_data(struct hso_serial *serial) 1969 { 1970 int count = serial->tx_data_count; 1971 int result; 1972 1973 usb_fill_bulk_urb(serial->tx_urb, 1974 serial->parent->usb, 1975 usb_sndbulkpipe(serial->parent->usb, 1976 serial->out_endp-> 1977 bEndpointAddress & 0x7F), 1978 serial->tx_data, serial->tx_data_count, 1979 hso_std_serial_write_bulk_callback, serial); 1980 1981 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1982 if (result) { 1983 dev_warn(&serial->parent->usb->dev, 1984 "Failed to submit urb - res %d\n", result); 1985 return result; 1986 } 1987 1988 return count; 1989 } 1990 1991 /* callback after read or write on muxed serial port */ 1992 static void ctrl_callback(struct urb *urb) 1993 { 1994 struct hso_serial *serial = urb->context; 1995 struct usb_ctrlrequest *req; 1996 int status = urb->status; 1997 struct tty_struct *tty; 1998 1999 /* sanity check */ 2000 if (!serial) 2001 return; 2002 2003 spin_lock(&serial->serial_lock); 2004 serial->tx_urb_used = 0; 2005 tty = tty_kref_get(serial->tty); 2006 spin_unlock(&serial->serial_lock); 2007 if (status) { 2008 log_usb_status(status, __func__); 2009 tty_kref_put(tty); 2010 return; 2011 } 2012 2013 /* what request? */ 2014 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2015 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2016 D4("Actual length of urb = %d\n", urb->actual_length); 2017 DUMP1(urb->transfer_buffer, urb->actual_length); 2018 2019 if (req->bRequestType == 2020 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2021 /* response to a read command */ 2022 serial->rx_urb_filled[0] = 1; 2023 spin_lock(&serial->serial_lock); 2024 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2025 spin_unlock(&serial->serial_lock); 2026 } else { 2027 hso_put_activity(serial->parent); 2028 if (tty) 2029 tty_wakeup(tty); 2030 /* response to a write command */ 2031 hso_kick_transmit(serial); 2032 } 2033 tty_kref_put(tty); 2034 } 2035 2036 /* handle RX data for serial port */ 2037 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2038 { 2039 struct tty_struct *tty; 2040 int write_length_remaining = 0; 2041 int curr_write_len; 2042 2043 /* Sanity check */ 2044 if (urb == NULL || serial == NULL) { 2045 D1("serial = NULL"); 2046 return -2; 2047 } 2048 2049 /* All callers to put_rxbuf_data hold serial_lock */ 2050 tty = tty_kref_get(serial->tty); 2051 2052 /* Push data to tty */ 2053 if (tty) { 2054 write_length_remaining = urb->actual_length - 2055 serial->curr_rx_urb_offset; 2056 D1("data to push to tty"); 2057 while (write_length_remaining) { 2058 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2059 tty_kref_put(tty); 2060 return -1; 2061 } 2062 curr_write_len = tty_insert_flip_string 2063 (tty, urb->transfer_buffer + 2064 serial->curr_rx_urb_offset, 2065 write_length_remaining); 2066 serial->curr_rx_urb_offset += curr_write_len; 2067 write_length_remaining -= curr_write_len; 2068 tty_flip_buffer_push(tty); 2069 } 2070 } 2071 if (write_length_remaining == 0) { 2072 serial->curr_rx_urb_offset = 0; 2073 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2074 } 2075 tty_kref_put(tty); 2076 return write_length_remaining; 2077 } 2078 2079 2080 /* Base driver functions */ 2081 2082 static void hso_log_port(struct hso_device *hso_dev) 2083 { 2084 char *port_type; 2085 char port_dev[20]; 2086 2087 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2088 case HSO_PORT_CONTROL: 2089 port_type = "Control"; 2090 break; 2091 case HSO_PORT_APP: 2092 port_type = "Application"; 2093 break; 2094 case HSO_PORT_GPS: 2095 port_type = "GPS"; 2096 break; 2097 case HSO_PORT_GPS_CONTROL: 2098 port_type = "GPS control"; 2099 break; 2100 case HSO_PORT_APP2: 2101 port_type = "Application2"; 2102 break; 2103 case HSO_PORT_PCSC: 2104 port_type = "PCSC"; 2105 break; 2106 case HSO_PORT_DIAG: 2107 port_type = "Diagnostic"; 2108 break; 2109 case HSO_PORT_DIAG2: 2110 port_type = "Diagnostic2"; 2111 break; 2112 case HSO_PORT_MODEM: 2113 port_type = "Modem"; 2114 break; 2115 case HSO_PORT_NETWORK: 2116 port_type = "Network"; 2117 break; 2118 default: 2119 port_type = "Unknown"; 2120 break; 2121 } 2122 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2123 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2124 } else 2125 sprintf(port_dev, "/dev/%s%d", tty_filename, 2126 dev2ser(hso_dev)->minor); 2127 2128 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2129 port_type, port_dev); 2130 } 2131 2132 static int hso_start_net_device(struct hso_device *hso_dev) 2133 { 2134 int i, result = 0; 2135 struct hso_net *hso_net = dev2net(hso_dev); 2136 2137 if (!hso_net) 2138 return -ENODEV; 2139 2140 /* send URBs for all read buffers */ 2141 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2142 2143 /* Prep a receive URB */ 2144 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2145 hso_dev->usb, 2146 usb_rcvbulkpipe(hso_dev->usb, 2147 hso_net->in_endp-> 2148 bEndpointAddress & 0x7F), 2149 hso_net->mux_bulk_rx_buf_pool[i], 2150 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2151 hso_net); 2152 2153 /* Put it out there so the device can send us stuff */ 2154 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2155 GFP_NOIO); 2156 if (result) 2157 dev_warn(&hso_dev->usb->dev, 2158 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2159 i, result); 2160 } 2161 2162 return result; 2163 } 2164 2165 static int hso_stop_net_device(struct hso_device *hso_dev) 2166 { 2167 int i; 2168 struct hso_net *hso_net = dev2net(hso_dev); 2169 2170 if (!hso_net) 2171 return -ENODEV; 2172 2173 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2174 if (hso_net->mux_bulk_rx_urb_pool[i]) 2175 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2176 2177 } 2178 if (hso_net->mux_bulk_tx_urb) 2179 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2180 2181 return 0; 2182 } 2183 2184 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2185 { 2186 int i, result = 0; 2187 struct hso_serial *serial = dev2ser(hso_dev); 2188 2189 if (!serial) 2190 return -ENODEV; 2191 2192 /* If it is not the MUX port fill in and submit a bulk urb (already 2193 * allocated in hso_serial_start) */ 2194 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2195 for (i = 0; i < serial->num_rx_urbs; i++) { 2196 usb_fill_bulk_urb(serial->rx_urb[i], 2197 serial->parent->usb, 2198 usb_rcvbulkpipe(serial->parent->usb, 2199 serial->in_endp-> 2200 bEndpointAddress & 2201 0x7F), 2202 serial->rx_data[i], 2203 serial->rx_data_length, 2204 hso_std_serial_read_bulk_callback, 2205 serial); 2206 result = usb_submit_urb(serial->rx_urb[i], flags); 2207 if (result) { 2208 dev_warn(&serial->parent->usb->dev, 2209 "Failed to submit urb - res %d\n", 2210 result); 2211 break; 2212 } 2213 } 2214 } else { 2215 mutex_lock(&serial->shared_int->shared_int_lock); 2216 if (!serial->shared_int->use_count) { 2217 result = 2218 hso_mux_submit_intr_urb(serial->shared_int, 2219 hso_dev->usb, flags); 2220 } 2221 serial->shared_int->use_count++; 2222 mutex_unlock(&serial->shared_int->shared_int_lock); 2223 } 2224 if (serial->tiocmget) 2225 tiocmget_submit_urb(serial, 2226 serial->tiocmget, 2227 serial->parent->usb); 2228 return result; 2229 } 2230 2231 static int hso_stop_serial_device(struct hso_device *hso_dev) 2232 { 2233 int i; 2234 struct hso_serial *serial = dev2ser(hso_dev); 2235 struct hso_tiocmget *tiocmget; 2236 2237 if (!serial) 2238 return -ENODEV; 2239 2240 for (i = 0; i < serial->num_rx_urbs; i++) { 2241 if (serial->rx_urb[i]) { 2242 usb_kill_urb(serial->rx_urb[i]); 2243 serial->rx_urb_filled[i] = 0; 2244 } 2245 } 2246 serial->curr_rx_urb_idx = 0; 2247 serial->curr_rx_urb_offset = 0; 2248 2249 if (serial->tx_urb) 2250 usb_kill_urb(serial->tx_urb); 2251 2252 if (serial->shared_int) { 2253 mutex_lock(&serial->shared_int->shared_int_lock); 2254 if (serial->shared_int->use_count && 2255 (--serial->shared_int->use_count == 0)) { 2256 struct urb *urb; 2257 2258 urb = serial->shared_int->shared_intr_urb; 2259 if (urb) 2260 usb_kill_urb(urb); 2261 } 2262 mutex_unlock(&serial->shared_int->shared_int_lock); 2263 } 2264 tiocmget = serial->tiocmget; 2265 if (tiocmget) { 2266 wake_up_interruptible(&tiocmget->waitq); 2267 usb_kill_urb(tiocmget->urb); 2268 } 2269 2270 return 0; 2271 } 2272 2273 static void hso_serial_common_free(struct hso_serial *serial) 2274 { 2275 int i; 2276 2277 if (serial->parent->dev) 2278 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2279 2280 tty_unregister_device(tty_drv, serial->minor); 2281 2282 for (i = 0; i < serial->num_rx_urbs; i++) { 2283 /* unlink and free RX URB */ 2284 usb_free_urb(serial->rx_urb[i]); 2285 /* free the RX buffer */ 2286 kfree(serial->rx_data[i]); 2287 } 2288 2289 /* unlink and free TX URB */ 2290 usb_free_urb(serial->tx_urb); 2291 kfree(serial->tx_data); 2292 } 2293 2294 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2295 int rx_size, int tx_size) 2296 { 2297 struct device *dev; 2298 int minor; 2299 int i; 2300 2301 minor = get_free_serial_index(); 2302 if (minor < 0) 2303 goto exit; 2304 2305 /* register our minor number */ 2306 serial->parent->dev = tty_register_device(tty_drv, minor, 2307 &serial->parent->interface->dev); 2308 dev = serial->parent->dev; 2309 dev->driver_data = serial->parent; 2310 i = device_create_file(dev, &dev_attr_hsotype); 2311 2312 /* fill in specific data for later use */ 2313 serial->minor = minor; 2314 serial->magic = HSO_SERIAL_MAGIC; 2315 spin_lock_init(&serial->serial_lock); 2316 serial->num_rx_urbs = num_urbs; 2317 2318 /* RX, allocate urb and initialize */ 2319 2320 /* prepare our RX buffer */ 2321 serial->rx_data_length = rx_size; 2322 for (i = 0; i < serial->num_rx_urbs; i++) { 2323 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2324 if (!serial->rx_urb[i]) { 2325 dev_err(dev, "Could not allocate urb?\n"); 2326 goto exit; 2327 } 2328 serial->rx_urb[i]->transfer_buffer = NULL; 2329 serial->rx_urb[i]->transfer_buffer_length = 0; 2330 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2331 GFP_KERNEL); 2332 if (!serial->rx_data[i]) { 2333 dev_err(dev, "%s - Out of memory\n", __func__); 2334 goto exit; 2335 } 2336 } 2337 2338 /* TX, allocate urb and initialize */ 2339 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2340 if (!serial->tx_urb) { 2341 dev_err(dev, "Could not allocate urb?\n"); 2342 goto exit; 2343 } 2344 serial->tx_urb->transfer_buffer = NULL; 2345 serial->tx_urb->transfer_buffer_length = 0; 2346 /* prepare our TX buffer */ 2347 serial->tx_data_count = 0; 2348 serial->tx_buffer_count = 0; 2349 serial->tx_data_length = tx_size; 2350 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2351 if (!serial->tx_data) { 2352 dev_err(dev, "%s - Out of memory", __func__); 2353 goto exit; 2354 } 2355 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2356 if (!serial->tx_buffer) { 2357 dev_err(dev, "%s - Out of memory", __func__); 2358 goto exit; 2359 } 2360 2361 return 0; 2362 exit: 2363 hso_serial_common_free(serial); 2364 return -1; 2365 } 2366 2367 /* Frees a general hso device */ 2368 static void hso_free_device(struct hso_device *hso_dev) 2369 { 2370 kfree(hso_dev); 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 /* start freeing */ 2421 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2422 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2423 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2424 } 2425 usb_free_urb(hso_net->mux_bulk_tx_urb); 2426 kfree(hso_net->mux_bulk_tx_buf); 2427 2428 remove_net_device(hso_net->parent); 2429 2430 if (hso_net->net) { 2431 unregister_netdev(hso_net->net); 2432 free_netdev(hso_net->net); 2433 } 2434 2435 hso_free_device(hso_dev); 2436 } 2437 2438 /* initialize the network interface */ 2439 static void hso_net_init(struct net_device *net) 2440 { 2441 struct hso_net *hso_net = netdev_priv(net); 2442 2443 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2444 2445 /* fill in the other fields */ 2446 net->open = hso_net_open; 2447 net->stop = hso_net_close; 2448 net->hard_start_xmit = hso_net_start_xmit; 2449 net->tx_timeout = hso_net_tx_timeout; 2450 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2451 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2452 net->type = ARPHRD_NONE; 2453 net->mtu = DEFAULT_MTU - 14; 2454 net->tx_queue_len = 10; 2455 SET_ETHTOOL_OPS(net, &ops); 2456 2457 /* and initialize the semaphore */ 2458 spin_lock_init(&hso_net->net_lock); 2459 } 2460 2461 /* Adds a network device in the network device table */ 2462 static int add_net_device(struct hso_device *hso_dev) 2463 { 2464 int i; 2465 2466 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2467 if (network_table[i] == NULL) { 2468 network_table[i] = hso_dev; 2469 break; 2470 } 2471 } 2472 if (i == HSO_MAX_NET_DEVICES) 2473 return -1; 2474 return 0; 2475 } 2476 2477 static int hso_radio_toggle(void *data, enum rfkill_state state) 2478 { 2479 struct hso_device *hso_dev = data; 2480 int enabled = (state == RFKILL_STATE_ON); 2481 int rv; 2482 2483 mutex_lock(&hso_dev->mutex); 2484 if (hso_dev->usb_gone) 2485 rv = 0; 2486 else 2487 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2488 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2489 USB_CTRL_SET_TIMEOUT); 2490 mutex_unlock(&hso_dev->mutex); 2491 return rv; 2492 } 2493 2494 /* Creates and sets up everything for rfkill */ 2495 static void hso_create_rfkill(struct hso_device *hso_dev, 2496 struct usb_interface *interface) 2497 { 2498 struct hso_net *hso_net = dev2net(hso_dev); 2499 struct device *dev = &hso_net->net->dev; 2500 char *rfkn; 2501 2502 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, 2503 RFKILL_TYPE_WWAN); 2504 if (!hso_net->rfkill) { 2505 dev_err(dev, "%s - Out of memory\n", __func__); 2506 return; 2507 } 2508 rfkn = kzalloc(20, GFP_KERNEL); 2509 if (!rfkn) { 2510 rfkill_free(hso_net->rfkill); 2511 hso_net->rfkill = NULL; 2512 dev_err(dev, "%s - Out of memory\n", __func__); 2513 return; 2514 } 2515 snprintf(rfkn, 20, "hso-%d", 2516 interface->altsetting->desc.bInterfaceNumber); 2517 hso_net->rfkill->name = rfkn; 2518 hso_net->rfkill->state = RFKILL_STATE_ON; 2519 hso_net->rfkill->data = hso_dev; 2520 hso_net->rfkill->toggle_radio = hso_radio_toggle; 2521 if (rfkill_register(hso_net->rfkill) < 0) { 2522 kfree(rfkn); 2523 hso_net->rfkill->name = NULL; 2524 rfkill_free(hso_net->rfkill); 2525 hso_net->rfkill = NULL; 2526 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2527 return; 2528 } 2529 } 2530 2531 /* Creates our network device */ 2532 static struct hso_device *hso_create_net_device(struct usb_interface *interface) 2533 { 2534 int result, i; 2535 struct net_device *net; 2536 struct hso_net *hso_net; 2537 struct hso_device *hso_dev; 2538 2539 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK); 2540 if (!hso_dev) 2541 return NULL; 2542 2543 /* allocate our network device, then we can put in our private data */ 2544 /* call hso_net_init to do the basic initialization */ 2545 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2546 if (!net) { 2547 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2548 goto exit; 2549 } 2550 2551 hso_net = netdev_priv(net); 2552 2553 hso_dev->port_data.dev_net = hso_net; 2554 hso_net->net = net; 2555 hso_net->parent = hso_dev; 2556 2557 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2558 USB_DIR_IN); 2559 if (!hso_net->in_endp) { 2560 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2561 goto exit; 2562 } 2563 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2564 USB_DIR_OUT); 2565 if (!hso_net->out_endp) { 2566 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2567 goto exit; 2568 } 2569 SET_NETDEV_DEV(net, &interface->dev); 2570 2571 /* registering our net device */ 2572 result = register_netdev(net); 2573 if (result) { 2574 dev_err(&interface->dev, "Failed to register device\n"); 2575 goto exit; 2576 } 2577 2578 /* start allocating */ 2579 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2580 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2581 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2582 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2583 goto exit; 2584 } 2585 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2586 GFP_KERNEL); 2587 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2588 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2589 goto exit; 2590 } 2591 } 2592 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2593 if (!hso_net->mux_bulk_tx_urb) { 2594 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2595 goto exit; 2596 } 2597 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2598 if (!hso_net->mux_bulk_tx_buf) { 2599 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2600 goto exit; 2601 } 2602 2603 add_net_device(hso_dev); 2604 2605 hso_log_port(hso_dev); 2606 2607 hso_create_rfkill(hso_dev, interface); 2608 2609 return hso_dev; 2610 exit: 2611 hso_free_net_device(hso_dev); 2612 return NULL; 2613 } 2614 2615 static void hso_free_tiomget(struct hso_serial *serial) 2616 { 2617 struct hso_tiocmget *tiocmget = serial->tiocmget; 2618 if (tiocmget) { 2619 kfree(tiocmget); 2620 if (tiocmget->urb) { 2621 usb_free_urb(tiocmget->urb); 2622 tiocmget->urb = NULL; 2623 } 2624 serial->tiocmget = NULL; 2625 2626 } 2627 } 2628 2629 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2630 static void hso_free_serial_device(struct hso_device *hso_dev) 2631 { 2632 struct hso_serial *serial = dev2ser(hso_dev); 2633 2634 if (!serial) 2635 return; 2636 set_serial_by_index(serial->minor, NULL); 2637 2638 hso_serial_common_free(serial); 2639 2640 if (serial->shared_int) { 2641 mutex_lock(&serial->shared_int->shared_int_lock); 2642 if (--serial->shared_int->ref_count == 0) 2643 hso_free_shared_int(serial->shared_int); 2644 else 2645 mutex_unlock(&serial->shared_int->shared_int_lock); 2646 } 2647 hso_free_tiomget(serial); 2648 kfree(serial); 2649 hso_free_device(hso_dev); 2650 } 2651 2652 /* Creates a bulk AT channel */ 2653 static struct hso_device *hso_create_bulk_serial_device( 2654 struct usb_interface *interface, int port) 2655 { 2656 struct hso_device *hso_dev; 2657 struct hso_serial *serial; 2658 int num_urbs; 2659 struct hso_tiocmget *tiocmget; 2660 2661 hso_dev = hso_create_device(interface, port); 2662 if (!hso_dev) 2663 return NULL; 2664 2665 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2666 if (!serial) 2667 goto exit; 2668 2669 serial->parent = hso_dev; 2670 hso_dev->port_data.dev_serial = serial; 2671 2672 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2673 num_urbs = 2; 2674 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2675 GFP_KERNEL); 2676 /* it isn't going to break our heart if serial->tiocmget 2677 * allocation fails don't bother checking this. 2678 */ 2679 if (serial->tiocmget) { 2680 tiocmget = serial->tiocmget; 2681 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2682 if (tiocmget->urb) { 2683 mutex_init(&tiocmget->mutex); 2684 init_waitqueue_head(&tiocmget->waitq); 2685 tiocmget->endp = hso_get_ep( 2686 interface, 2687 USB_ENDPOINT_XFER_INT, 2688 USB_DIR_IN); 2689 } else 2690 hso_free_tiomget(serial); 2691 } 2692 } 2693 else 2694 num_urbs = 1; 2695 2696 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2697 BULK_URB_TX_SIZE)) 2698 goto exit; 2699 2700 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2701 USB_DIR_IN); 2702 if (!serial->in_endp) { 2703 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2704 goto exit2; 2705 } 2706 2707 if (! 2708 (serial->out_endp = 2709 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2710 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2711 goto exit2; 2712 } 2713 2714 serial->write_data = hso_std_serial_write_data; 2715 2716 /* and record this serial */ 2717 set_serial_by_index(serial->minor, serial); 2718 2719 /* setup the proc dirs and files if needed */ 2720 hso_log_port(hso_dev); 2721 2722 /* done, return it */ 2723 return hso_dev; 2724 2725 exit2: 2726 hso_serial_common_free(serial); 2727 exit: 2728 hso_free_tiomget(serial); 2729 kfree(serial); 2730 hso_free_device(hso_dev); 2731 return NULL; 2732 } 2733 2734 /* Creates a multiplexed AT channel */ 2735 static 2736 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2737 int port, 2738 struct hso_shared_int *mux) 2739 { 2740 struct hso_device *hso_dev; 2741 struct hso_serial *serial; 2742 int port_spec; 2743 2744 port_spec = HSO_INTF_MUX; 2745 port_spec &= ~HSO_PORT_MASK; 2746 2747 port_spec |= hso_mux_to_port(port); 2748 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2749 return NULL; 2750 2751 hso_dev = hso_create_device(interface, port_spec); 2752 if (!hso_dev) 2753 return NULL; 2754 2755 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2756 if (!serial) 2757 goto exit; 2758 2759 hso_dev->port_data.dev_serial = serial; 2760 serial->parent = hso_dev; 2761 2762 if (hso_serial_common_create 2763 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2764 goto exit; 2765 2766 serial->tx_data_length--; 2767 serial->write_data = hso_mux_serial_write_data; 2768 2769 serial->shared_int = mux; 2770 mutex_lock(&serial->shared_int->shared_int_lock); 2771 serial->shared_int->ref_count++; 2772 mutex_unlock(&serial->shared_int->shared_int_lock); 2773 2774 /* and record this serial */ 2775 set_serial_by_index(serial->minor, serial); 2776 2777 /* setup the proc dirs and files if needed */ 2778 hso_log_port(hso_dev); 2779 2780 /* done, return it */ 2781 return hso_dev; 2782 2783 exit: 2784 if (serial) { 2785 tty_unregister_device(tty_drv, serial->minor); 2786 kfree(serial); 2787 } 2788 if (hso_dev) 2789 hso_free_device(hso_dev); 2790 return NULL; 2791 2792 } 2793 2794 static void hso_free_shared_int(struct hso_shared_int *mux) 2795 { 2796 usb_free_urb(mux->shared_intr_urb); 2797 kfree(mux->shared_intr_buf); 2798 mutex_unlock(&mux->shared_int_lock); 2799 kfree(mux); 2800 } 2801 2802 static 2803 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2804 { 2805 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2806 2807 if (!mux) 2808 return NULL; 2809 2810 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2811 USB_DIR_IN); 2812 if (!mux->intr_endp) { 2813 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2814 goto exit; 2815 } 2816 2817 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2818 if (!mux->shared_intr_urb) { 2819 dev_err(&interface->dev, "Could not allocate intr urb?"); 2820 goto exit; 2821 } 2822 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, 2823 GFP_KERNEL); 2824 if (!mux->shared_intr_buf) { 2825 dev_err(&interface->dev, "Could not allocate intr buf?"); 2826 goto exit; 2827 } 2828 2829 mutex_init(&mux->shared_int_lock); 2830 2831 return mux; 2832 2833 exit: 2834 kfree(mux->shared_intr_buf); 2835 usb_free_urb(mux->shared_intr_urb); 2836 kfree(mux); 2837 return NULL; 2838 } 2839 2840 /* Gets the port spec for a certain interface */ 2841 static int hso_get_config_data(struct usb_interface *interface) 2842 { 2843 struct usb_device *usbdev = interface_to_usbdev(interface); 2844 u8 config_data[17]; 2845 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2846 s32 result; 2847 2848 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2849 0x86, 0xC0, 0, 0, config_data, 17, 2850 USB_CTRL_SET_TIMEOUT) != 0x11) { 2851 return -EIO; 2852 } 2853 2854 switch (config_data[if_num]) { 2855 case 0x0: 2856 result = 0; 2857 break; 2858 case 0x1: 2859 result = HSO_PORT_DIAG; 2860 break; 2861 case 0x2: 2862 result = HSO_PORT_GPS; 2863 break; 2864 case 0x3: 2865 result = HSO_PORT_GPS_CONTROL; 2866 break; 2867 case 0x4: 2868 result = HSO_PORT_APP; 2869 break; 2870 case 0x5: 2871 result = HSO_PORT_APP2; 2872 break; 2873 case 0x6: 2874 result = HSO_PORT_CONTROL; 2875 break; 2876 case 0x7: 2877 result = HSO_PORT_NETWORK; 2878 break; 2879 case 0x8: 2880 result = HSO_PORT_MODEM; 2881 break; 2882 case 0x9: 2883 result = HSO_PORT_MSD; 2884 break; 2885 case 0xa: 2886 result = HSO_PORT_PCSC; 2887 break; 2888 case 0xb: 2889 result = HSO_PORT_VOICE; 2890 break; 2891 default: 2892 result = 0; 2893 } 2894 2895 if (result) 2896 result |= HSO_INTF_BULK; 2897 2898 if (config_data[16] & 0x1) 2899 result |= HSO_INFO_CRC_BUG; 2900 2901 return result; 2902 } 2903 2904 /* called once for each interface upon device insertion */ 2905 static int hso_probe(struct usb_interface *interface, 2906 const struct usb_device_id *id) 2907 { 2908 int mux, i, if_num, port_spec; 2909 unsigned char port_mask; 2910 struct hso_device *hso_dev = NULL; 2911 struct hso_shared_int *shared_int; 2912 struct hso_device *tmp_dev = NULL; 2913 2914 if_num = interface->altsetting->desc.bInterfaceNumber; 2915 2916 /* Get the interface/port specification from either driver_info or from 2917 * the device itself */ 2918 if (id->driver_info) 2919 port_spec = ((u32 *)(id->driver_info))[if_num]; 2920 else 2921 port_spec = hso_get_config_data(interface); 2922 2923 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2924 dev_err(&interface->dev, "Not our interface\n"); 2925 return -ENODEV; 2926 } 2927 /* Check if we need to switch to alt interfaces prior to port 2928 * configuration */ 2929 if (interface->num_altsetting > 1) 2930 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2931 interface->needs_remote_wakeup = 1; 2932 2933 /* Allocate new hso device(s) */ 2934 switch (port_spec & HSO_INTF_MASK) { 2935 case HSO_INTF_MUX: 2936 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2937 /* Create the network device */ 2938 if (!disable_net) { 2939 hso_dev = hso_create_net_device(interface); 2940 if (!hso_dev) 2941 goto exit; 2942 tmp_dev = hso_dev; 2943 } 2944 } 2945 2946 if (hso_get_mux_ports(interface, &port_mask)) 2947 /* TODO: de-allocate everything */ 2948 goto exit; 2949 2950 shared_int = hso_create_shared_int(interface); 2951 if (!shared_int) 2952 goto exit; 2953 2954 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2955 if (port_mask & i) { 2956 hso_dev = hso_create_mux_serial_device( 2957 interface, i, shared_int); 2958 if (!hso_dev) 2959 goto exit; 2960 } 2961 } 2962 2963 if (tmp_dev) 2964 hso_dev = tmp_dev; 2965 break; 2966 2967 case HSO_INTF_BULK: 2968 /* It's a regular bulk interface */ 2969 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) 2970 && !disable_net) 2971 hso_dev = hso_create_net_device(interface); 2972 else 2973 hso_dev = 2974 hso_create_bulk_serial_device(interface, port_spec); 2975 if (!hso_dev) 2976 goto exit; 2977 break; 2978 default: 2979 goto exit; 2980 } 2981 2982 usb_driver_claim_interface(&hso_driver, interface, hso_dev); 2983 2984 /* save our data pointer in this device */ 2985 usb_set_intfdata(interface, hso_dev); 2986 2987 /* done */ 2988 return 0; 2989 exit: 2990 hso_free_interface(interface); 2991 return -ENODEV; 2992 } 2993 2994 /* device removed, cleaning up */ 2995 static void hso_disconnect(struct usb_interface *interface) 2996 { 2997 hso_free_interface(interface); 2998 2999 /* remove reference of our private data */ 3000 usb_set_intfdata(interface, NULL); 3001 3002 usb_driver_release_interface(&hso_driver, interface); 3003 } 3004 3005 static void async_get_intf(struct work_struct *data) 3006 { 3007 struct hso_device *hso_dev = 3008 container_of(data, struct hso_device, async_get_intf); 3009 usb_autopm_get_interface(hso_dev->interface); 3010 } 3011 3012 static void async_put_intf(struct work_struct *data) 3013 { 3014 struct hso_device *hso_dev = 3015 container_of(data, struct hso_device, async_put_intf); 3016 usb_autopm_put_interface(hso_dev->interface); 3017 } 3018 3019 static int hso_get_activity(struct hso_device *hso_dev) 3020 { 3021 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3022 if (!hso_dev->is_active) { 3023 hso_dev->is_active = 1; 3024 schedule_work(&hso_dev->async_get_intf); 3025 } 3026 } 3027 3028 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3029 return -EAGAIN; 3030 3031 usb_mark_last_busy(hso_dev->usb); 3032 3033 return 0; 3034 } 3035 3036 static int hso_put_activity(struct hso_device *hso_dev) 3037 { 3038 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3039 if (hso_dev->is_active) { 3040 hso_dev->is_active = 0; 3041 schedule_work(&hso_dev->async_put_intf); 3042 return -EAGAIN; 3043 } 3044 } 3045 hso_dev->is_active = 0; 3046 return 0; 3047 } 3048 3049 /* called by kernel when we need to suspend device */ 3050 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3051 { 3052 int i, result; 3053 3054 /* Stop all serial ports */ 3055 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3056 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3057 result = hso_stop_serial_device(serial_table[i]); 3058 if (result) 3059 goto out; 3060 } 3061 } 3062 3063 /* Stop all network ports */ 3064 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3065 if (network_table[i] && 3066 (network_table[i]->interface == iface)) { 3067 result = hso_stop_net_device(network_table[i]); 3068 if (result) 3069 goto out; 3070 } 3071 } 3072 3073 out: 3074 return 0; 3075 } 3076 3077 /* called by kernel when we need to resume device */ 3078 static int hso_resume(struct usb_interface *iface) 3079 { 3080 int i, result = 0; 3081 struct hso_net *hso_net; 3082 3083 /* Start all serial ports */ 3084 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3085 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3086 if (dev2ser(serial_table[i])->open_count) { 3087 result = 3088 hso_start_serial_device(serial_table[i], GFP_NOIO); 3089 hso_kick_transmit(dev2ser(serial_table[i])); 3090 if (result) 3091 goto out; 3092 } 3093 } 3094 } 3095 3096 /* Start all network ports */ 3097 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3098 if (network_table[i] && 3099 (network_table[i]->interface == iface)) { 3100 hso_net = dev2net(network_table[i]); 3101 if (hso_net->flags & IFF_UP) { 3102 /* First transmit any lingering data, 3103 then restart the device. */ 3104 if (hso_net->skb_tx_buf) { 3105 dev_dbg(&iface->dev, 3106 "Transmitting" 3107 " lingering data\n"); 3108 hso_net_start_xmit(hso_net->skb_tx_buf, 3109 hso_net->net); 3110 hso_net->skb_tx_buf = NULL; 3111 } 3112 result = hso_start_net_device(network_table[i]); 3113 if (result) 3114 goto out; 3115 } 3116 } 3117 } 3118 3119 out: 3120 return result; 3121 } 3122 3123 static void hso_serial_ref_free(struct kref *ref) 3124 { 3125 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3126 3127 hso_free_serial_device(hso_dev); 3128 } 3129 3130 static void hso_free_interface(struct usb_interface *interface) 3131 { 3132 struct hso_serial *hso_dev; 3133 struct tty_struct *tty; 3134 int i; 3135 3136 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3137 if (serial_table[i] 3138 && (serial_table[i]->interface == interface)) { 3139 hso_dev = dev2ser(serial_table[i]); 3140 spin_lock_irq(&hso_dev->serial_lock); 3141 tty = tty_kref_get(hso_dev->tty); 3142 spin_unlock_irq(&hso_dev->serial_lock); 3143 if (tty) 3144 tty_hangup(tty); 3145 mutex_lock(&hso_dev->parent->mutex); 3146 tty_kref_put(tty); 3147 hso_dev->parent->usb_gone = 1; 3148 mutex_unlock(&hso_dev->parent->mutex); 3149 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3150 } 3151 } 3152 3153 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3154 if (network_table[i] 3155 && (network_table[i]->interface == interface)) { 3156 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3157 /* hso_stop_net_device doesn't stop the net queue since 3158 * traffic needs to start it again when suspended */ 3159 netif_stop_queue(dev2net(network_table[i])->net); 3160 hso_stop_net_device(network_table[i]); 3161 cancel_work_sync(&network_table[i]->async_put_intf); 3162 cancel_work_sync(&network_table[i]->async_get_intf); 3163 if (rfk) 3164 rfkill_unregister(rfk); 3165 hso_free_net_device(network_table[i]); 3166 } 3167 } 3168 } 3169 3170 /* Helper functions */ 3171 3172 /* Get the endpoint ! */ 3173 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3174 int type, int dir) 3175 { 3176 int i; 3177 struct usb_host_interface *iface = intf->cur_altsetting; 3178 struct usb_endpoint_descriptor *endp; 3179 3180 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3181 endp = &iface->endpoint[i].desc; 3182 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3183 (usb_endpoint_type(endp) == type)) 3184 return endp; 3185 } 3186 3187 return NULL; 3188 } 3189 3190 /* Get the byte that describes which ports are enabled */ 3191 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3192 { 3193 int i; 3194 struct usb_host_interface *iface = intf->cur_altsetting; 3195 3196 if (iface->extralen == 3) { 3197 *ports = iface->extra[2]; 3198 return 0; 3199 } 3200 3201 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3202 if (iface->endpoint[i].extralen == 3) { 3203 *ports = iface->endpoint[i].extra[2]; 3204 return 0; 3205 } 3206 } 3207 3208 return -1; 3209 } 3210 3211 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3212 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3213 struct usb_device *usb, gfp_t gfp) 3214 { 3215 int result; 3216 3217 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3218 usb_rcvintpipe(usb, 3219 shared_int->intr_endp->bEndpointAddress & 0x7F), 3220 shared_int->shared_intr_buf, 3221 shared_int->intr_endp->wMaxPacketSize, 3222 intr_callback, shared_int, 3223 shared_int->intr_endp->bInterval); 3224 3225 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3226 if (result) 3227 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, 3228 result); 3229 3230 return result; 3231 } 3232 3233 /* operations setup of the serial interface */ 3234 static const struct tty_operations hso_serial_ops = { 3235 .open = hso_serial_open, 3236 .close = hso_serial_close, 3237 .write = hso_serial_write, 3238 .write_room = hso_serial_write_room, 3239 .ioctl = hso_serial_ioctl, 3240 .set_termios = hso_serial_set_termios, 3241 .chars_in_buffer = hso_serial_chars_in_buffer, 3242 .tiocmget = hso_serial_tiocmget, 3243 .tiocmset = hso_serial_tiocmset, 3244 .unthrottle = hso_unthrottle 3245 }; 3246 3247 static struct usb_driver hso_driver = { 3248 .name = driver_name, 3249 .probe = hso_probe, 3250 .disconnect = hso_disconnect, 3251 .id_table = hso_ids, 3252 .suspend = hso_suspend, 3253 .resume = hso_resume, 3254 .reset_resume = hso_resume, 3255 .supports_autosuspend = 1, 3256 }; 3257 3258 static int __init hso_init(void) 3259 { 3260 int i; 3261 int result; 3262 3263 /* put it in the log */ 3264 printk(KERN_INFO "hso: %s\n", version); 3265 3266 /* Initialise the serial table semaphore and table */ 3267 spin_lock_init(&serial_table_lock); 3268 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3269 serial_table[i] = NULL; 3270 3271 /* allocate our driver using the proper amount of supported minors */ 3272 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3273 if (!tty_drv) 3274 return -ENOMEM; 3275 3276 /* fill in all needed values */ 3277 tty_drv->magic = TTY_DRIVER_MAGIC; 3278 tty_drv->owner = THIS_MODULE; 3279 tty_drv->driver_name = driver_name; 3280 tty_drv->name = tty_filename; 3281 3282 /* if major number is provided as parameter, use that one */ 3283 if (tty_major) 3284 tty_drv->major = tty_major; 3285 3286 tty_drv->minor_start = 0; 3287 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3288 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3289 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3290 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3291 tty_drv->init_termios = tty_std_termios; 3292 hso_init_termios(&tty_drv->init_termios); 3293 tty_set_operations(tty_drv, &hso_serial_ops); 3294 3295 /* register the tty driver */ 3296 result = tty_register_driver(tty_drv); 3297 if (result) { 3298 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3299 __func__, result); 3300 return result; 3301 } 3302 3303 /* register this module as an usb driver */ 3304 result = usb_register(&hso_driver); 3305 if (result) { 3306 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3307 result); 3308 /* cleanup serial interface */ 3309 tty_unregister_driver(tty_drv); 3310 return result; 3311 } 3312 3313 /* done */ 3314 return 0; 3315 } 3316 3317 static void __exit hso_exit(void) 3318 { 3319 printk(KERN_INFO "hso: unloaded\n"); 3320 3321 tty_unregister_driver(tty_drv); 3322 /* deregister the usb driver */ 3323 usb_deregister(&hso_driver); 3324 } 3325 3326 /* Module definitions */ 3327 module_init(hso_init); 3328 module_exit(hso_exit); 3329 3330 MODULE_AUTHOR(MOD_AUTHOR); 3331 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3332 MODULE_LICENSE(MOD_LICENSE); 3333 MODULE_INFO(Version, DRIVER_VERSION); 3334 3335 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3336 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3337 module_param(debug, int, S_IRUGO | S_IWUSR); 3338 3339 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3340 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3341 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3342 3343 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3344 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3345 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3346