1// SPDX-License-Identifier: GPL-2.0-only 2/****************************************************************************** 3 * 4 * Driver for Option High Speed Mobile Devices. 5 * 6 * Copyright (C) 2008 Option International 7 * Filip Aben <f.aben@option.com> 8 * Denis Joseph Barrow <d.barow@option.com> 9 * Jan Dumon <j.dumon@option.com> 10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 11 * <ajb@spheresystems.co.uk> 12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 13 * Copyright (C) 2008 Novell, Inc. 14 * 15 *****************************************************************************/ 16 17/****************************************************************************** 18 * 19 * Description of the device: 20 * 21 * Interface 0: Contains the IP network interface on the bulk end points. 22 * The multiplexed serial ports are using the interrupt and 23 * control endpoints. 24 * Interrupt contains a bitmap telling which multiplexed 25 * serialport needs servicing. 26 * 27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 28 * port is opened, as this have a huge impact on the network port 29 * throughput. 30 * 31 * Interface 2: Standard modem interface - circuit switched interface, this 32 * can be used to make a standard ppp connection however it 33 * should not be used in conjunction with the IP network interface 34 * enabled for USB performance reasons i.e. if using this set 35 * ideally disable_net=1. 36 * 37 *****************************************************************************/ 38 39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 40 41#include <linux/sched/signal.h> 42#include <linux/slab.h> 43#include <linux/init.h> 44#include <linux/delay.h> 45#include <linux/netdevice.h> 46#include <linux/module.h> 47#include <linux/ethtool.h> 48#include <linux/usb.h> 49#include <linux/tty.h> 50#include <linux/tty_driver.h> 51#include <linux/tty_flip.h> 52#include <linux/kmod.h> 53#include <linux/rfkill.h> 54#include <linux/ip.h> 55#include <linux/uaccess.h> 56#include <linux/usb/cdc.h> 57#include <net/arp.h> 58#include <asm/byteorder.h> 59#include <linux/serial_core.h> 60#include <linux/serial.h> 61 62 63#define MOD_AUTHOR "Option Wireless" 64#define MOD_DESCRIPTION "USB High Speed Option driver" 65 66#define HSO_MAX_NET_DEVICES 10 67#define HSO__MAX_MTU 2048 68#define DEFAULT_MTU 1500 69#define DEFAULT_MRU 1500 70 71#define CTRL_URB_RX_SIZE 1024 72#define CTRL_URB_TX_SIZE 64 73 74#define BULK_URB_RX_SIZE 4096 75#define BULK_URB_TX_SIZE 8192 76 77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 79#define MUX_BULK_RX_BUF_COUNT 4 80#define USB_TYPE_OPTION_VENDOR 0x20 81 82/* These definitions are used with the struct hso_net flags element */ 83/* - use *_bit operations on it. (bit indices not values.) */ 84#define HSO_NET_RUNNING 0 85 86#define HSO_NET_TX_TIMEOUT (HZ*10) 87 88#define HSO_SERIAL_MAGIC 0x48534f31 89 90/* Number of ttys to handle */ 91#define HSO_SERIAL_TTY_MINORS 256 92 93#define MAX_RX_URBS 2 94 95/*****************************************************************************/ 96/* Debugging functions */ 97/*****************************************************************************/ 98#define hso_dbg(lvl, fmt, ...) \ 99do { \ 100 if ((lvl) & debug) \ 101 pr_info("[%d:%s] " fmt, \ 102 __LINE__, __func__, ##__VA_ARGS__); \ 103} while (0) 104 105/*****************************************************************************/ 106/* Enumerators */ 107/*****************************************************************************/ 108enum pkt_parse_state { 109 WAIT_IP, 110 WAIT_DATA, 111 WAIT_SYNC 112}; 113 114/*****************************************************************************/ 115/* Structs */ 116/*****************************************************************************/ 117 118struct hso_shared_int { 119 struct usb_endpoint_descriptor *intr_endp; 120 void *shared_intr_buf; 121 struct urb *shared_intr_urb; 122 struct usb_device *usb; 123 int use_count; 124 int ref_count; 125 struct mutex shared_int_lock; 126}; 127 128struct hso_net { 129 struct hso_device *parent; 130 struct net_device *net; 131 struct rfkill *rfkill; 132 char name[24]; 133 134 struct usb_endpoint_descriptor *in_endp; 135 struct usb_endpoint_descriptor *out_endp; 136 137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 138 struct urb *mux_bulk_tx_urb; 139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 140 void *mux_bulk_tx_buf; 141 142 struct sk_buff *skb_rx_buf; 143 struct sk_buff *skb_tx_buf; 144 145 enum pkt_parse_state rx_parse_state; 146 spinlock_t net_lock; 147 148 unsigned short rx_buf_size; 149 unsigned short rx_buf_missing; 150 struct iphdr rx_ip_hdr; 151 152 unsigned long flags; 153}; 154 155enum rx_ctrl_state{ 156 RX_IDLE, 157 RX_SENT, 158 RX_PENDING 159}; 160 161#define BM_REQUEST_TYPE (0xa1) 162#define B_NOTIFICATION (0x20) 163#define W_VALUE (0x0) 164#define W_LENGTH (0x2) 165 166#define B_OVERRUN (0x1<<6) 167#define B_PARITY (0x1<<5) 168#define B_FRAMING (0x1<<4) 169#define B_RING_SIGNAL (0x1<<3) 170#define B_BREAK (0x1<<2) 171#define B_TX_CARRIER (0x1<<1) 172#define B_RX_CARRIER (0x1<<0) 173 174struct hso_serial_state_notification { 175 u8 bmRequestType; 176 u8 bNotification; 177 u16 wValue; 178 u16 wIndex; 179 u16 wLength; 180 u16 UART_state_bitmap; 181} __packed; 182 183struct hso_tiocmget { 184 struct mutex mutex; 185 wait_queue_head_t waitq; 186 int intr_completed; 187 struct usb_endpoint_descriptor *endp; 188 struct urb *urb; 189 struct hso_serial_state_notification *serial_state_notification; 190 u16 prev_UART_state_bitmap; 191 struct uart_icount icount; 192}; 193 194 195struct hso_serial { 196 struct hso_device *parent; 197 int magic; 198 u8 minor; 199 200 struct hso_shared_int *shared_int; 201 202 /* rx/tx urb could be either a bulk urb or a control urb depending 203 on which serial port it is used on. */ 204 struct urb *rx_urb[MAX_RX_URBS]; 205 u8 num_rx_urbs; 206 u8 *rx_data[MAX_RX_URBS]; 207 u16 rx_data_length; /* should contain allocated length */ 208 209 struct urb *tx_urb; 210 u8 *tx_data; 211 u8 *tx_buffer; 212 u16 tx_data_length; /* should contain allocated length */ 213 u16 tx_data_count; 214 u16 tx_buffer_count; 215 struct usb_ctrlrequest ctrl_req_tx; 216 struct usb_ctrlrequest ctrl_req_rx; 217 218 struct usb_endpoint_descriptor *in_endp; 219 struct usb_endpoint_descriptor *out_endp; 220 221 enum rx_ctrl_state rx_state; 222 u8 rts_state; 223 u8 dtr_state; 224 unsigned tx_urb_used:1; 225 226 struct tty_port port; 227 /* from usb_serial_port */ 228 spinlock_t serial_lock; 229 230 int (*write_data) (struct hso_serial *serial); 231 struct hso_tiocmget *tiocmget; 232 /* Hacks required to get flow control 233 * working on the serial receive buffers 234 * so as not to drop characters on the floor. 235 */ 236 int curr_rx_urb_idx; 237 u8 rx_urb_filled[MAX_RX_URBS]; 238 struct tasklet_struct unthrottle_tasklet; 239}; 240 241struct hso_device { 242 union { 243 struct hso_serial *dev_serial; 244 struct hso_net *dev_net; 245 } port_data; 246 247 u32 port_spec; 248 249 u8 is_active; 250 u8 usb_gone; 251 struct work_struct async_get_intf; 252 struct work_struct async_put_intf; 253 254 struct usb_device *usb; 255 struct usb_interface *interface; 256 257 struct device *dev; 258 struct kref ref; 259 struct mutex mutex; 260}; 261 262/* Type of interface */ 263#define HSO_INTF_MASK 0xFF00 264#define HSO_INTF_MUX 0x0100 265#define HSO_INTF_BULK 0x0200 266 267/* Type of port */ 268#define HSO_PORT_MASK 0xFF 269#define HSO_PORT_NO_PORT 0x0 270#define HSO_PORT_CONTROL 0x1 271#define HSO_PORT_APP 0x2 272#define HSO_PORT_GPS 0x3 273#define HSO_PORT_PCSC 0x4 274#define HSO_PORT_APP2 0x5 275#define HSO_PORT_GPS_CONTROL 0x6 276#define HSO_PORT_MSD 0x7 277#define HSO_PORT_VOICE 0x8 278#define HSO_PORT_DIAG2 0x9 279#define HSO_PORT_DIAG 0x10 280#define HSO_PORT_MODEM 0x11 281#define HSO_PORT_NETWORK 0x12 282 283/* Additional device info */ 284#define HSO_INFO_MASK 0xFF000000 285#define HSO_INFO_CRC_BUG 0x01000000 286 287/*****************************************************************************/ 288/* Prototypes */ 289/*****************************************************************************/ 290/* Serial driver functions */ 291static int hso_serial_tiocmset(struct tty_struct *tty, 292 unsigned int set, unsigned int clear); 293static void ctrl_callback(struct urb *urb); 294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 295static void hso_kick_transmit(struct hso_serial *serial); 296/* Helper functions */ 297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 298 struct usb_device *usb, gfp_t gfp); 299static void handle_usb_error(int status, const char *function, 300 struct hso_device *hso_dev); 301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 302 int type, int dir); 303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 304static void hso_free_interface(struct usb_interface *intf); 305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 306static int hso_stop_serial_device(struct hso_device *hso_dev); 307static int hso_start_net_device(struct hso_device *hso_dev); 308static void hso_free_shared_int(struct hso_shared_int *shared_int); 309static int hso_stop_net_device(struct hso_device *hso_dev); 310static void hso_serial_ref_free(struct kref *ref); 311static void hso_std_serial_read_bulk_callback(struct urb *urb); 312static int hso_mux_serial_read(struct hso_serial *serial); 313static void async_get_intf(struct work_struct *data); 314static void async_put_intf(struct work_struct *data); 315static int hso_put_activity(struct hso_device *hso_dev); 316static int hso_get_activity(struct hso_device *hso_dev); 317static void tiocmget_intr_callback(struct urb *urb); 318/*****************************************************************************/ 319/* Helping functions */ 320/*****************************************************************************/ 321 322/* #define DEBUG */ 323 324static inline struct hso_net *dev2net(struct hso_device *hso_dev) 325{ 326 return hso_dev->port_data.dev_net; 327} 328 329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 330{ 331 return hso_dev->port_data.dev_serial; 332} 333 334/* Debugging functions */ 335#ifdef DEBUG 336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 337 unsigned int len) 338{ 339 static char name[255]; 340 341 sprintf(name, "hso[%d:%s]", line_count, func_name); 342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 343} 344 345#define DUMP(buf_, len_) \ 346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 347 348#define DUMP1(buf_, len_) \ 349 do { \ 350 if (0x01 & debug) \ 351 DUMP(buf_, len_); \ 352 } while (0) 353#else 354#define DUMP(buf_, len_) 355#define DUMP1(buf_, len_) 356#endif 357 358/* module parameters */ 359static int debug; 360static int tty_major; 361static int disable_net; 362 363/* driver info */ 364static const char driver_name[] = "hso"; 365static const char tty_filename[] = "ttyHS"; 366static const char *version = __FILE__ ": " MOD_AUTHOR; 367/* the usb driver itself (registered in hso_init) */ 368static struct usb_driver hso_driver; 369/* serial structures */ 370static struct tty_driver *tty_drv; 371static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 372static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 373static DEFINE_SPINLOCK(serial_table_lock); 374 375static const s32 default_port_spec[] = { 376 HSO_INTF_MUX | HSO_PORT_NETWORK, 377 HSO_INTF_BULK | HSO_PORT_DIAG, 378 HSO_INTF_BULK | HSO_PORT_MODEM, 379 0 380}; 381 382static const s32 icon321_port_spec[] = { 383 HSO_INTF_MUX | HSO_PORT_NETWORK, 384 HSO_INTF_BULK | HSO_PORT_DIAG2, 385 HSO_INTF_BULK | HSO_PORT_MODEM, 386 HSO_INTF_BULK | HSO_PORT_DIAG, 387 0 388}; 389 390#define default_port_device(vendor, product) \ 391 USB_DEVICE(vendor, product), \ 392 .driver_info = (kernel_ulong_t)default_port_spec 393 394#define icon321_port_device(vendor, product) \ 395 USB_DEVICE(vendor, product), \ 396 .driver_info = (kernel_ulong_t)icon321_port_spec 397 398/* list of devices we support */ 399static const struct usb_device_id hso_ids[] = { 400 {default_port_device(0x0af0, 0x6711)}, 401 {default_port_device(0x0af0, 0x6731)}, 402 {default_port_device(0x0af0, 0x6751)}, 403 {default_port_device(0x0af0, 0x6771)}, 404 {default_port_device(0x0af0, 0x6791)}, 405 {default_port_device(0x0af0, 0x6811)}, 406 {default_port_device(0x0af0, 0x6911)}, 407 {default_port_device(0x0af0, 0x6951)}, 408 {default_port_device(0x0af0, 0x6971)}, 409 {default_port_device(0x0af0, 0x7011)}, 410 {default_port_device(0x0af0, 0x7031)}, 411 {default_port_device(0x0af0, 0x7051)}, 412 {default_port_device(0x0af0, 0x7071)}, 413 {default_port_device(0x0af0, 0x7111)}, 414 {default_port_device(0x0af0, 0x7211)}, 415 {default_port_device(0x0af0, 0x7251)}, 416 {default_port_device(0x0af0, 0x7271)}, 417 {default_port_device(0x0af0, 0x7311)}, 418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 428 {USB_DEVICE(0x0af0, 0x7701)}, 429 {USB_DEVICE(0x0af0, 0x7706)}, 430 {USB_DEVICE(0x0af0, 0x7801)}, 431 {USB_DEVICE(0x0af0, 0x7901)}, 432 {USB_DEVICE(0x0af0, 0x7A01)}, 433 {USB_DEVICE(0x0af0, 0x7A05)}, 434 {USB_DEVICE(0x0af0, 0x8200)}, 435 {USB_DEVICE(0x0af0, 0x8201)}, 436 {USB_DEVICE(0x0af0, 0x8300)}, 437 {USB_DEVICE(0x0af0, 0x8302)}, 438 {USB_DEVICE(0x0af0, 0x8304)}, 439 {USB_DEVICE(0x0af0, 0x8400)}, 440 {USB_DEVICE(0x0af0, 0x8600)}, 441 {USB_DEVICE(0x0af0, 0x8800)}, 442 {USB_DEVICE(0x0af0, 0x8900)}, 443 {USB_DEVICE(0x0af0, 0x9000)}, 444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 445 {USB_DEVICE(0x0af0, 0xd035)}, 446 {USB_DEVICE(0x0af0, 0xd055)}, 447 {USB_DEVICE(0x0af0, 0xd155)}, 448 {USB_DEVICE(0x0af0, 0xd255)}, 449 {USB_DEVICE(0x0af0, 0xd057)}, 450 {USB_DEVICE(0x0af0, 0xd157)}, 451 {USB_DEVICE(0x0af0, 0xd257)}, 452 {USB_DEVICE(0x0af0, 0xd357)}, 453 {USB_DEVICE(0x0af0, 0xd058)}, 454 {USB_DEVICE(0x0af0, 0xc100)}, 455 {} 456}; 457MODULE_DEVICE_TABLE(usb, hso_ids); 458 459/* Sysfs attribute */ 460static ssize_t hsotype_show(struct device *dev, 461 struct device_attribute *attr, char *buf) 462{ 463 struct hso_device *hso_dev = dev_get_drvdata(dev); 464 char *port_name; 465 466 if (!hso_dev) 467 return 0; 468 469 switch (hso_dev->port_spec & HSO_PORT_MASK) { 470 case HSO_PORT_CONTROL: 471 port_name = "Control"; 472 break; 473 case HSO_PORT_APP: 474 port_name = "Application"; 475 break; 476 case HSO_PORT_APP2: 477 port_name = "Application2"; 478 break; 479 case HSO_PORT_GPS: 480 port_name = "GPS"; 481 break; 482 case HSO_PORT_GPS_CONTROL: 483 port_name = "GPS Control"; 484 break; 485 case HSO_PORT_PCSC: 486 port_name = "PCSC"; 487 break; 488 case HSO_PORT_DIAG: 489 port_name = "Diagnostic"; 490 break; 491 case HSO_PORT_DIAG2: 492 port_name = "Diagnostic2"; 493 break; 494 case HSO_PORT_MODEM: 495 port_name = "Modem"; 496 break; 497 case HSO_PORT_NETWORK: 498 port_name = "Network"; 499 break; 500 default: 501 port_name = "Unknown"; 502 break; 503 } 504 505 return sprintf(buf, "%s\n", port_name); 506} 507static DEVICE_ATTR_RO(hsotype); 508 509static struct attribute *hso_serial_dev_attrs[] = { 510 &dev_attr_hsotype.attr, 511 NULL 512}; 513 514ATTRIBUTE_GROUPS(hso_serial_dev); 515 516static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 517{ 518 int idx; 519 520 for (idx = 0; idx < serial->num_rx_urbs; idx++) 521 if (serial->rx_urb[idx] == urb) 522 return idx; 523 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 524 return -1; 525} 526 527/* converts mux value to a port spec value */ 528static u32 hso_mux_to_port(int mux) 529{ 530 u32 result; 531 532 switch (mux) { 533 case 0x1: 534 result = HSO_PORT_CONTROL; 535 break; 536 case 0x2: 537 result = HSO_PORT_APP; 538 break; 539 case 0x4: 540 result = HSO_PORT_PCSC; 541 break; 542 case 0x8: 543 result = HSO_PORT_GPS; 544 break; 545 case 0x10: 546 result = HSO_PORT_APP2; 547 break; 548 default: 549 result = HSO_PORT_NO_PORT; 550 } 551 return result; 552} 553 554/* converts port spec value to a mux value */ 555static u32 hso_port_to_mux(int port) 556{ 557 u32 result; 558 559 switch (port & HSO_PORT_MASK) { 560 case HSO_PORT_CONTROL: 561 result = 0x0; 562 break; 563 case HSO_PORT_APP: 564 result = 0x1; 565 break; 566 case HSO_PORT_PCSC: 567 result = 0x2; 568 break; 569 case HSO_PORT_GPS: 570 result = 0x3; 571 break; 572 case HSO_PORT_APP2: 573 result = 0x4; 574 break; 575 default: 576 result = 0x0; 577 } 578 return result; 579} 580 581static struct hso_serial *get_serial_by_shared_int_and_type( 582 struct hso_shared_int *shared_int, 583 int mux) 584{ 585 int i, port; 586 587 port = hso_mux_to_port(mux); 588 589 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 590 if (serial_table[i] && 591 (dev2ser(serial_table[i])->shared_int == shared_int) && 592 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 593 return dev2ser(serial_table[i]); 594 } 595 } 596 597 return NULL; 598} 599 600static struct hso_serial *get_serial_by_index(unsigned index) 601{ 602 struct hso_serial *serial = NULL; 603 unsigned long flags; 604 605 spin_lock_irqsave(&serial_table_lock, flags); 606 if (serial_table[index]) 607 serial = dev2ser(serial_table[index]); 608 spin_unlock_irqrestore(&serial_table_lock, flags); 609 610 return serial; 611} 612 613static int obtain_minor(struct hso_serial *serial) 614{ 615 int index; 616 unsigned long flags; 617 618 spin_lock_irqsave(&serial_table_lock, flags); 619 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 620 if (serial_table[index] == NULL) { 621 serial_table[index] = serial->parent; 622 serial->minor = index; 623 spin_unlock_irqrestore(&serial_table_lock, flags); 624 return 0; 625 } 626 } 627 spin_unlock_irqrestore(&serial_table_lock, flags); 628 629 pr_err("%s: no free serial devices in table\n", __func__); 630 return -1; 631} 632 633static void release_minor(struct hso_serial *serial) 634{ 635 unsigned long flags; 636 637 spin_lock_irqsave(&serial_table_lock, flags); 638 serial_table[serial->minor] = NULL; 639 spin_unlock_irqrestore(&serial_table_lock, flags); 640} 641 642static void handle_usb_error(int status, const char *function, 643 struct hso_device *hso_dev) 644{ 645 char *explanation; 646 647 switch (status) { 648 case -ENODEV: 649 explanation = "no device"; 650 break; 651 case -ENOENT: 652 explanation = "endpoint not enabled"; 653 break; 654 case -EPIPE: 655 explanation = "endpoint stalled"; 656 break; 657 case -ENOSPC: 658 explanation = "not enough bandwidth"; 659 break; 660 case -ESHUTDOWN: 661 explanation = "device disabled"; 662 break; 663 case -EHOSTUNREACH: 664 explanation = "device suspended"; 665 break; 666 case -EINVAL: 667 case -EAGAIN: 668 case -EFBIG: 669 case -EMSGSIZE: 670 explanation = "internal error"; 671 break; 672 case -EILSEQ: 673 case -EPROTO: 674 case -ETIME: 675 case -ETIMEDOUT: 676 explanation = "protocol error"; 677 if (hso_dev) 678 usb_queue_reset_device(hso_dev->interface); 679 break; 680 default: 681 explanation = "unknown status"; 682 break; 683 } 684 685 /* log a meaningful explanation of an USB status */ 686 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 687 function, explanation, status); 688} 689 690/* Network interface functions */ 691 692/* called when net interface is brought up by ifconfig */ 693static int hso_net_open(struct net_device *net) 694{ 695 struct hso_net *odev = netdev_priv(net); 696 unsigned long flags = 0; 697 698 if (!odev) { 699 dev_err(&net->dev, "No net device !\n"); 700 return -ENODEV; 701 } 702 703 odev->skb_tx_buf = NULL; 704 705 /* setup environment */ 706 spin_lock_irqsave(&odev->net_lock, flags); 707 odev->rx_parse_state = WAIT_IP; 708 odev->rx_buf_size = 0; 709 odev->rx_buf_missing = sizeof(struct iphdr); 710 spin_unlock_irqrestore(&odev->net_lock, flags); 711 712 /* We are up and running. */ 713 set_bit(HSO_NET_RUNNING, &odev->flags); 714 hso_start_net_device(odev->parent); 715 716 /* Tell the kernel we are ready to start receiving from it */ 717 netif_start_queue(net); 718 719 return 0; 720} 721 722/* called when interface is brought down by ifconfig */ 723static int hso_net_close(struct net_device *net) 724{ 725 struct hso_net *odev = netdev_priv(net); 726 727 /* we don't need the queue anymore */ 728 netif_stop_queue(net); 729 /* no longer running */ 730 clear_bit(HSO_NET_RUNNING, &odev->flags); 731 732 hso_stop_net_device(odev->parent); 733 734 /* done */ 735 return 0; 736} 737 738/* USB tells is xmit done, we should start the netqueue again */ 739static void write_bulk_callback(struct urb *urb) 740{ 741 struct hso_net *odev = urb->context; 742 int status = urb->status; 743 744 /* Sanity check */ 745 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 746 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 747 return; 748 } 749 750 /* Do we still have a valid kernel network device? */ 751 if (!netif_device_present(odev->net)) { 752 dev_err(&urb->dev->dev, "%s: net device not present\n", 753 __func__); 754 return; 755 } 756 757 /* log status, but don't act on it, we don't need to resubmit anything 758 * anyhow */ 759 if (status) 760 handle_usb_error(status, __func__, odev->parent); 761 762 hso_put_activity(odev->parent); 763 764 /* Tell the network interface we are ready for another frame */ 765 netif_wake_queue(odev->net); 766} 767 768/* called by kernel when we need to transmit a packet */ 769static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 770 struct net_device *net) 771{ 772 struct hso_net *odev = netdev_priv(net); 773 int result; 774 775 /* Tell the kernel, "No more frames 'til we are done with this one." */ 776 netif_stop_queue(net); 777 if (hso_get_activity(odev->parent) == -EAGAIN) { 778 odev->skb_tx_buf = skb; 779 return NETDEV_TX_OK; 780 } 781 782 /* log if asked */ 783 DUMP1(skb->data, skb->len); 784 /* Copy it from kernel memory to OUR memory */ 785 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 786 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 787 788 /* Fill in the URB for shipping it out. */ 789 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 790 odev->parent->usb, 791 usb_sndbulkpipe(odev->parent->usb, 792 odev->out_endp-> 793 bEndpointAddress & 0x7F), 794 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 795 odev); 796 797 /* Deal with the Zero Length packet problem, I hope */ 798 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 799 800 /* Send the URB on its merry way. */ 801 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 802 if (result) { 803 dev_warn(&odev->parent->interface->dev, 804 "failed mux_bulk_tx_urb %d\n", result); 805 net->stats.tx_errors++; 806 netif_start_queue(net); 807 } else { 808 net->stats.tx_packets++; 809 net->stats.tx_bytes += skb->len; 810 } 811 dev_kfree_skb(skb); 812 /* we're done */ 813 return NETDEV_TX_OK; 814} 815 816static const struct ethtool_ops ops = { 817 .get_link = ethtool_op_get_link 818}; 819 820/* called when a packet did not ack after watchdogtimeout */ 821static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue) 822{ 823 struct hso_net *odev = netdev_priv(net); 824 825 if (!odev) 826 return; 827 828 /* Tell syslog we are hosed. */ 829 dev_warn(&net->dev, "Tx timed out.\n"); 830 831 /* Tear the waiting frame off the list */ 832 if (odev->mux_bulk_tx_urb) 833 usb_unlink_urb(odev->mux_bulk_tx_urb); 834 835 /* Update statistics */ 836 net->stats.tx_errors++; 837} 838 839/* make a real packet from the received USB buffer */ 840static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 841 unsigned int count, unsigned char is_eop) 842{ 843 unsigned short temp_bytes; 844 unsigned short buffer_offset = 0; 845 unsigned short frame_len; 846 847 /* log if needed */ 848 hso_dbg(0x1, "Rx %d bytes\n", count); 849 DUMP(ip_pkt, min(128, (int)count)); 850 851 while (count) { 852 switch (odev->rx_parse_state) { 853 case WAIT_IP: 854 /* waiting for IP header. */ 855 /* wanted bytes - size of ip header */ 856 temp_bytes = 857 (count < 858 odev->rx_buf_missing) ? count : odev-> 859 rx_buf_missing; 860 861 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 862 odev->rx_buf_size, ip_pkt + buffer_offset, 863 temp_bytes); 864 865 odev->rx_buf_size += temp_bytes; 866 buffer_offset += temp_bytes; 867 odev->rx_buf_missing -= temp_bytes; 868 count -= temp_bytes; 869 870 if (!odev->rx_buf_missing) { 871 /* header is complete allocate an sk_buffer and 872 * continue to WAIT_DATA */ 873 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 874 875 if ((frame_len > DEFAULT_MRU) || 876 (frame_len < sizeof(struct iphdr))) { 877 dev_err(&odev->net->dev, 878 "Invalid frame (%d) length\n", 879 frame_len); 880 odev->rx_parse_state = WAIT_SYNC; 881 continue; 882 } 883 /* Allocate an sk_buff */ 884 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 885 frame_len); 886 if (!odev->skb_rx_buf) { 887 /* We got no receive buffer. */ 888 hso_dbg(0x1, "could not allocate memory\n"); 889 odev->rx_parse_state = WAIT_SYNC; 890 continue; 891 } 892 893 /* Copy what we got so far. make room for iphdr 894 * after tail. */ 895 skb_put_data(odev->skb_rx_buf, 896 (char *)&(odev->rx_ip_hdr), 897 sizeof(struct iphdr)); 898 899 /* ETH_HLEN */ 900 odev->rx_buf_size = sizeof(struct iphdr); 901 902 /* Filip actually use .tot_len */ 903 odev->rx_buf_missing = 904 frame_len - sizeof(struct iphdr); 905 odev->rx_parse_state = WAIT_DATA; 906 } 907 break; 908 909 case WAIT_DATA: 910 temp_bytes = (count < odev->rx_buf_missing) 911 ? count : odev->rx_buf_missing; 912 913 /* Copy the rest of the bytes that are left in the 914 * buffer into the waiting sk_buf. */ 915 /* Make room for temp_bytes after tail. */ 916 skb_put_data(odev->skb_rx_buf, 917 ip_pkt + buffer_offset, 918 temp_bytes); 919 920 odev->rx_buf_missing -= temp_bytes; 921 count -= temp_bytes; 922 buffer_offset += temp_bytes; 923 odev->rx_buf_size += temp_bytes; 924 if (!odev->rx_buf_missing) { 925 /* Packet is complete. Inject into stack. */ 926 /* We have IP packet here */ 927 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 928 skb_reset_mac_header(odev->skb_rx_buf); 929 930 /* Ship it off to the kernel */ 931 netif_rx(odev->skb_rx_buf); 932 /* No longer our buffer. */ 933 odev->skb_rx_buf = NULL; 934 935 /* update out statistics */ 936 odev->net->stats.rx_packets++; 937 938 odev->net->stats.rx_bytes += odev->rx_buf_size; 939 940 odev->rx_buf_size = 0; 941 odev->rx_buf_missing = sizeof(struct iphdr); 942 odev->rx_parse_state = WAIT_IP; 943 } 944 break; 945 946 case WAIT_SYNC: 947 hso_dbg(0x1, " W_S\n"); 948 count = 0; 949 break; 950 default: 951 hso_dbg(0x1, "\n"); 952 count--; 953 break; 954 } 955 } 956 957 /* Recovery mechanism for WAIT_SYNC state. */ 958 if (is_eop) { 959 if (odev->rx_parse_state == WAIT_SYNC) { 960 odev->rx_parse_state = WAIT_IP; 961 odev->rx_buf_size = 0; 962 odev->rx_buf_missing = sizeof(struct iphdr); 963 } 964 } 965} 966 967static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 968{ 969 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 970 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 971 972 if (((rest == 5) || (rest == 6)) && 973 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 974 crc_check, 4)) { 975 urb->actual_length -= 4; 976 } 977} 978 979/* Moving data from usb to kernel (in interrupt state) */ 980static void read_bulk_callback(struct urb *urb) 981{ 982 struct hso_net *odev = urb->context; 983 struct net_device *net; 984 int result; 985 unsigned long flags; 986 int status = urb->status; 987 988 /* is al ok? (Filip: Who's Al ?) */ 989 if (status) { 990 handle_usb_error(status, __func__, odev->parent); 991 return; 992 } 993 994 /* Sanity check */ 995 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 996 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 997 return; 998 } 999 usb_mark_last_busy(urb->dev); 1000 1001 net = odev->net; 1002 1003 if (!netif_device_present(net)) { 1004 /* Somebody killed our network interface... */ 1005 return; 1006 } 1007 1008 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1009 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1010 1011 /* do we even have a packet? */ 1012 if (urb->actual_length) { 1013 /* Handle the IP stream, add header and push it onto network 1014 * stack if the packet is complete. */ 1015 spin_lock_irqsave(&odev->net_lock, flags); 1016 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1017 (urb->transfer_buffer_length > 1018 urb->actual_length) ? 1 : 0); 1019 spin_unlock_irqrestore(&odev->net_lock, flags); 1020 } 1021 1022 /* We are done with this URB, resubmit it. Prep the USB to wait for 1023 * another frame. Reuse same as received. */ 1024 usb_fill_bulk_urb(urb, 1025 odev->parent->usb, 1026 usb_rcvbulkpipe(odev->parent->usb, 1027 odev->in_endp-> 1028 bEndpointAddress & 0x7F), 1029 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1030 read_bulk_callback, odev); 1031 1032 /* Give this to the USB subsystem so it can tell us when more data 1033 * arrives. */ 1034 result = usb_submit_urb(urb, GFP_ATOMIC); 1035 if (result) 1036 dev_warn(&odev->parent->interface->dev, 1037 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1038 result); 1039} 1040 1041/* Serial driver functions */ 1042 1043static void hso_init_termios(struct ktermios *termios) 1044{ 1045 /* 1046 * The default requirements for this device are: 1047 */ 1048 termios->c_iflag &= 1049 ~(IGNBRK /* disable ignore break */ 1050 | BRKINT /* disable break causes interrupt */ 1051 | PARMRK /* disable mark parity errors */ 1052 | ISTRIP /* disable clear high bit of input characters */ 1053 | INLCR /* disable translate NL to CR */ 1054 | IGNCR /* disable ignore CR */ 1055 | ICRNL /* disable translate CR to NL */ 1056 | IXON); /* disable enable XON/XOFF flow control */ 1057 1058 /* disable postprocess output characters */ 1059 termios->c_oflag &= ~OPOST; 1060 1061 termios->c_lflag &= 1062 ~(ECHO /* disable echo input characters */ 1063 | ECHONL /* disable echo new line */ 1064 | ICANON /* disable erase, kill, werase, and rprnt 1065 special characters */ 1066 | ISIG /* disable interrupt, quit, and suspend special 1067 characters */ 1068 | IEXTEN); /* disable non-POSIX special characters */ 1069 1070 termios->c_cflag &= 1071 ~(CSIZE /* no size */ 1072 | PARENB /* disable parity bit */ 1073 | CBAUD /* clear current baud rate */ 1074 | CBAUDEX); /* clear current buad rate */ 1075 1076 termios->c_cflag |= CS8; /* character size 8 bits */ 1077 1078 /* baud rate 115200 */ 1079 tty_termios_encode_baud_rate(termios, 115200, 115200); 1080} 1081 1082static void _hso_serial_set_termios(struct tty_struct *tty) 1083{ 1084 struct hso_serial *serial = tty->driver_data; 1085 1086 if (!serial) { 1087 pr_err("%s: no tty structures", __func__); 1088 return; 1089 } 1090 1091 hso_dbg(0x8, "port %d\n", serial->minor); 1092 1093 /* 1094 * Fix up unsupported bits 1095 */ 1096 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1097 1098 tty->termios.c_cflag &= 1099 ~(CSIZE /* no size */ 1100 | PARENB /* disable parity bit */ 1101 | CBAUD /* clear current baud rate */ 1102 | CBAUDEX); /* clear current buad rate */ 1103 1104 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1105 1106 /* baud rate 115200 */ 1107 tty_encode_baud_rate(tty, 115200, 115200); 1108} 1109 1110static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1111{ 1112 int result; 1113 /* We are done with this URB, resubmit it. Prep the USB to wait for 1114 * another frame */ 1115 usb_fill_bulk_urb(urb, serial->parent->usb, 1116 usb_rcvbulkpipe(serial->parent->usb, 1117 serial->in_endp-> 1118 bEndpointAddress & 0x7F), 1119 urb->transfer_buffer, serial->rx_data_length, 1120 hso_std_serial_read_bulk_callback, serial); 1121 /* Give this to the USB subsystem so it can tell us when more data 1122 * arrives. */ 1123 result = usb_submit_urb(urb, GFP_ATOMIC); 1124 if (result) { 1125 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1126 __func__, result); 1127 } 1128} 1129 1130 1131 1132 1133static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1134{ 1135 int count; 1136 struct urb *curr_urb; 1137 1138 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1139 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1140 count = put_rxbuf_data(curr_urb, serial); 1141 if (count == -1) 1142 return; 1143 if (count == 0) { 1144 serial->curr_rx_urb_idx++; 1145 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1146 serial->curr_rx_urb_idx = 0; 1147 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1148 } 1149 } 1150} 1151 1152static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1153{ 1154 int count = 0; 1155 struct urb *urb; 1156 1157 urb = serial->rx_urb[0]; 1158 if (serial->port.count > 0) { 1159 count = put_rxbuf_data(urb, serial); 1160 if (count == -1) 1161 return; 1162 } 1163 /* Re issue a read as long as we receive data. */ 1164 1165 if (count == 0 && ((urb->actual_length != 0) || 1166 (serial->rx_state == RX_PENDING))) { 1167 serial->rx_state = RX_SENT; 1168 hso_mux_serial_read(serial); 1169 } else 1170 serial->rx_state = RX_IDLE; 1171} 1172 1173 1174/* read callback for Diag and CS port */ 1175static void hso_std_serial_read_bulk_callback(struct urb *urb) 1176{ 1177 struct hso_serial *serial = urb->context; 1178 int status = urb->status; 1179 unsigned long flags; 1180 1181 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1182 1183 /* sanity check */ 1184 if (!serial) { 1185 hso_dbg(0x1, "serial == NULL\n"); 1186 return; 1187 } 1188 if (status) { 1189 handle_usb_error(status, __func__, serial->parent); 1190 return; 1191 } 1192 1193 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1194 DUMP1(urb->transfer_buffer, urb->actual_length); 1195 1196 /* Anyone listening? */ 1197 if (serial->port.count == 0) 1198 return; 1199 1200 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1201 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1202 /* Valid data, handle RX data */ 1203 spin_lock_irqsave(&serial->serial_lock, flags); 1204 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1205 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1206 spin_unlock_irqrestore(&serial->serial_lock, flags); 1207} 1208 1209/* 1210 * This needs to be a tasklet otherwise we will 1211 * end up recursively calling this function. 1212 */ 1213static void hso_unthrottle_tasklet(struct tasklet_struct *t) 1214{ 1215 struct hso_serial *serial = from_tasklet(serial, t, 1216 unthrottle_tasklet); 1217 unsigned long flags; 1218 1219 spin_lock_irqsave(&serial->serial_lock, flags); 1220 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1221 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1222 else 1223 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1224 spin_unlock_irqrestore(&serial->serial_lock, flags); 1225} 1226 1227static void hso_unthrottle(struct tty_struct *tty) 1228{ 1229 struct hso_serial *serial = tty->driver_data; 1230 1231 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1232} 1233 1234/* open the requested serial port */ 1235static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1236{ 1237 struct hso_serial *serial = get_serial_by_index(tty->index); 1238 int result; 1239 1240 /* sanity check */ 1241 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1242 WARN_ON(1); 1243 tty->driver_data = NULL; 1244 hso_dbg(0x1, "Failed to open port\n"); 1245 return -ENODEV; 1246 } 1247 1248 mutex_lock(&serial->parent->mutex); 1249 result = usb_autopm_get_interface(serial->parent->interface); 1250 if (result < 0) 1251 goto err_out; 1252 1253 hso_dbg(0x1, "Opening %d\n", serial->minor); 1254 1255 /* setup */ 1256 tty->driver_data = serial; 1257 tty_port_tty_set(&serial->port, tty); 1258 1259 /* check for port already opened, if not set the termios */ 1260 serial->port.count++; 1261 if (serial->port.count == 1) { 1262 serial->rx_state = RX_IDLE; 1263 /* Force default termio settings */ 1264 _hso_serial_set_termios(tty); 1265 tasklet_setup(&serial->unthrottle_tasklet, 1266 hso_unthrottle_tasklet); 1267 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1268 if (result) { 1269 hso_stop_serial_device(serial->parent); 1270 serial->port.count--; 1271 } else { 1272 kref_get(&serial->parent->ref); 1273 } 1274 } else { 1275 hso_dbg(0x1, "Port was already open\n"); 1276 } 1277 1278 usb_autopm_put_interface(serial->parent->interface); 1279 1280 /* done */ 1281 if (result) 1282 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1283err_out: 1284 mutex_unlock(&serial->parent->mutex); 1285 return result; 1286} 1287 1288/* close the requested serial port */ 1289static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1290{ 1291 struct hso_serial *serial = tty->driver_data; 1292 u8 usb_gone; 1293 1294 hso_dbg(0x1, "Closing serial port\n"); 1295 1296 /* Open failed, no close cleanup required */ 1297 if (serial == NULL) 1298 return; 1299 1300 mutex_lock(&serial->parent->mutex); 1301 usb_gone = serial->parent->usb_gone; 1302 1303 if (!usb_gone) 1304 usb_autopm_get_interface(serial->parent->interface); 1305 1306 /* reset the rts and dtr */ 1307 /* do the actual close */ 1308 serial->port.count--; 1309 1310 if (serial->port.count <= 0) { 1311 serial->port.count = 0; 1312 tty_port_tty_set(&serial->port, NULL); 1313 if (!usb_gone) 1314 hso_stop_serial_device(serial->parent); 1315 tasklet_kill(&serial->unthrottle_tasklet); 1316 } 1317 1318 if (!usb_gone) 1319 usb_autopm_put_interface(serial->parent->interface); 1320 1321 mutex_unlock(&serial->parent->mutex); 1322} 1323 1324/* close the requested serial port */ 1325static ssize_t hso_serial_write(struct tty_struct *tty, const u8 *buf, 1326 size_t count) 1327{ 1328 struct hso_serial *serial = tty->driver_data; 1329 unsigned long flags; 1330 1331 /* sanity check */ 1332 if (serial == NULL) { 1333 pr_err("%s: serial is NULL\n", __func__); 1334 return -ENODEV; 1335 } 1336 1337 spin_lock_irqsave(&serial->serial_lock, flags); 1338 1339 count = min_t(size_t, serial->tx_data_length - serial->tx_buffer_count, 1340 count); 1341 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, count); 1342 serial->tx_buffer_count += count; 1343 1344 spin_unlock_irqrestore(&serial->serial_lock, flags); 1345 1346 hso_kick_transmit(serial); 1347 /* done */ 1348 return count; 1349} 1350 1351/* how much room is there for writing */ 1352static unsigned int hso_serial_write_room(struct tty_struct *tty) 1353{ 1354 struct hso_serial *serial = tty->driver_data; 1355 unsigned int room; 1356 unsigned long flags; 1357 1358 spin_lock_irqsave(&serial->serial_lock, flags); 1359 room = serial->tx_data_length - serial->tx_buffer_count; 1360 spin_unlock_irqrestore(&serial->serial_lock, flags); 1361 1362 /* return free room */ 1363 return room; 1364} 1365 1366static void hso_serial_cleanup(struct tty_struct *tty) 1367{ 1368 struct hso_serial *serial = tty->driver_data; 1369 1370 if (!serial) 1371 return; 1372 1373 kref_put(&serial->parent->ref, hso_serial_ref_free); 1374} 1375 1376/* setup the term */ 1377static void hso_serial_set_termios(struct tty_struct *tty, 1378 const struct ktermios *old) 1379{ 1380 struct hso_serial *serial = tty->driver_data; 1381 unsigned long flags; 1382 1383 if (old) 1384 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n", 1385 (unsigned int)tty->termios.c_cflag, 1386 (unsigned int)old->c_cflag); 1387 1388 /* the actual setup */ 1389 spin_lock_irqsave(&serial->serial_lock, flags); 1390 if (serial->port.count) 1391 _hso_serial_set_termios(tty); 1392 else 1393 tty->termios = *old; 1394 spin_unlock_irqrestore(&serial->serial_lock, flags); 1395 1396 /* done */ 1397} 1398 1399/* how many characters in the buffer */ 1400static unsigned int hso_serial_chars_in_buffer(struct tty_struct *tty) 1401{ 1402 struct hso_serial *serial = tty->driver_data; 1403 unsigned long flags; 1404 unsigned int chars; 1405 1406 /* sanity check */ 1407 if (serial == NULL) 1408 return 0; 1409 1410 spin_lock_irqsave(&serial->serial_lock, flags); 1411 chars = serial->tx_buffer_count; 1412 spin_unlock_irqrestore(&serial->serial_lock, flags); 1413 1414 return chars; 1415} 1416static int tiocmget_submit_urb(struct hso_serial *serial, 1417 struct hso_tiocmget *tiocmget, 1418 struct usb_device *usb) 1419{ 1420 int result; 1421 1422 if (serial->parent->usb_gone) 1423 return -ENODEV; 1424 usb_fill_int_urb(tiocmget->urb, usb, 1425 usb_rcvintpipe(usb, 1426 tiocmget->endp-> 1427 bEndpointAddress & 0x7F), 1428 tiocmget->serial_state_notification, 1429 sizeof(struct hso_serial_state_notification), 1430 tiocmget_intr_callback, serial, 1431 tiocmget->endp->bInterval); 1432 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1433 if (result) { 1434 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1435 result); 1436 } 1437 return result; 1438 1439} 1440 1441static void tiocmget_intr_callback(struct urb *urb) 1442{ 1443 struct hso_serial *serial = urb->context; 1444 struct hso_tiocmget *tiocmget; 1445 int status = urb->status; 1446 u16 UART_state_bitmap, prev_UART_state_bitmap; 1447 struct uart_icount *icount; 1448 struct hso_serial_state_notification *serial_state_notification; 1449 struct usb_device *usb; 1450 struct usb_interface *interface; 1451 int if_num; 1452 1453 /* Sanity checks */ 1454 if (!serial) 1455 return; 1456 if (status) { 1457 handle_usb_error(status, __func__, serial->parent); 1458 return; 1459 } 1460 1461 /* tiocmget is only supported on HSO_PORT_MODEM */ 1462 tiocmget = serial->tiocmget; 1463 if (!tiocmget) 1464 return; 1465 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1466 1467 usb = serial->parent->usb; 1468 interface = serial->parent->interface; 1469 1470 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1471 1472 /* wIndex should be the USB interface number of the port to which the 1473 * notification applies, which should always be the Modem port. 1474 */ 1475 serial_state_notification = tiocmget->serial_state_notification; 1476 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1477 serial_state_notification->bNotification != B_NOTIFICATION || 1478 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1479 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1480 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1481 dev_warn(&usb->dev, 1482 "hso received invalid serial state notification\n"); 1483 DUMP(serial_state_notification, 1484 sizeof(struct hso_serial_state_notification)); 1485 } else { 1486 unsigned long flags; 1487 1488 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1489 UART_state_bitmap); 1490 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1491 icount = &tiocmget->icount; 1492 spin_lock_irqsave(&serial->serial_lock, flags); 1493 if ((UART_state_bitmap & B_OVERRUN) != 1494 (prev_UART_state_bitmap & B_OVERRUN)) 1495 icount->parity++; 1496 if ((UART_state_bitmap & B_PARITY) != 1497 (prev_UART_state_bitmap & B_PARITY)) 1498 icount->parity++; 1499 if ((UART_state_bitmap & B_FRAMING) != 1500 (prev_UART_state_bitmap & B_FRAMING)) 1501 icount->frame++; 1502 if ((UART_state_bitmap & B_RING_SIGNAL) && 1503 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1504 icount->rng++; 1505 if ((UART_state_bitmap & B_BREAK) != 1506 (prev_UART_state_bitmap & B_BREAK)) 1507 icount->brk++; 1508 if ((UART_state_bitmap & B_TX_CARRIER) != 1509 (prev_UART_state_bitmap & B_TX_CARRIER)) 1510 icount->dsr++; 1511 if ((UART_state_bitmap & B_RX_CARRIER) != 1512 (prev_UART_state_bitmap & B_RX_CARRIER)) 1513 icount->dcd++; 1514 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1515 spin_unlock_irqrestore(&serial->serial_lock, flags); 1516 tiocmget->intr_completed = 1; 1517 wake_up_interruptible(&tiocmget->waitq); 1518 } 1519 memset(serial_state_notification, 0, 1520 sizeof(struct hso_serial_state_notification)); 1521 tiocmget_submit_urb(serial, 1522 tiocmget, 1523 serial->parent->usb); 1524} 1525 1526/* 1527 * next few functions largely stolen from drivers/serial/serial_core.c 1528 */ 1529/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1530 * - mask passed in arg for lines of interest 1531 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1532 * Caller should use TIOCGICOUNT to see which one it was 1533 */ 1534static int 1535hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1536{ 1537 DECLARE_WAITQUEUE(wait, current); 1538 struct uart_icount cprev, cnow; 1539 struct hso_tiocmget *tiocmget; 1540 int ret; 1541 1542 tiocmget = serial->tiocmget; 1543 if (!tiocmget) 1544 return -ENOENT; 1545 /* 1546 * note the counters on entry 1547 */ 1548 spin_lock_irq(&serial->serial_lock); 1549 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1550 spin_unlock_irq(&serial->serial_lock); 1551 add_wait_queue(&tiocmget->waitq, &wait); 1552 for (;;) { 1553 spin_lock_irq(&serial->serial_lock); 1554 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1555 spin_unlock_irq(&serial->serial_lock); 1556 set_current_state(TASK_INTERRUPTIBLE); 1557 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1558 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1559 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1560 ret = 0; 1561 break; 1562 } 1563 schedule(); 1564 /* see if a signal did it */ 1565 if (signal_pending(current)) { 1566 ret = -ERESTARTSYS; 1567 break; 1568 } 1569 cprev = cnow; 1570 } 1571 __set_current_state(TASK_RUNNING); 1572 remove_wait_queue(&tiocmget->waitq, &wait); 1573 1574 return ret; 1575} 1576 1577/* 1578 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1579 * Return: write counters to the user passed counter struct 1580 * NB: both 1->0 and 0->1 transitions are counted except for 1581 * RI where only 0->1 is counted. 1582 */ 1583static int hso_get_count(struct tty_struct *tty, 1584 struct serial_icounter_struct *icount) 1585{ 1586 struct uart_icount cnow; 1587 struct hso_serial *serial = tty->driver_data; 1588 struct hso_tiocmget *tiocmget = serial->tiocmget; 1589 1590 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1591 1592 if (!tiocmget) 1593 return -ENOENT; 1594 spin_lock_irq(&serial->serial_lock); 1595 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1596 spin_unlock_irq(&serial->serial_lock); 1597 1598 icount->cts = cnow.cts; 1599 icount->dsr = cnow.dsr; 1600 icount->rng = cnow.rng; 1601 icount->dcd = cnow.dcd; 1602 icount->rx = cnow.rx; 1603 icount->tx = cnow.tx; 1604 icount->frame = cnow.frame; 1605 icount->overrun = cnow.overrun; 1606 icount->parity = cnow.parity; 1607 icount->brk = cnow.brk; 1608 icount->buf_overrun = cnow.buf_overrun; 1609 1610 return 0; 1611} 1612 1613 1614static int hso_serial_tiocmget(struct tty_struct *tty) 1615{ 1616 int retval; 1617 struct hso_serial *serial = tty->driver_data; 1618 struct hso_tiocmget *tiocmget; 1619 u16 UART_state_bitmap; 1620 1621 /* sanity check */ 1622 if (!serial) { 1623 hso_dbg(0x1, "no tty structures\n"); 1624 return -EINVAL; 1625 } 1626 spin_lock_irq(&serial->serial_lock); 1627 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1628 ((serial->dtr_state) ? TIOCM_DTR : 0); 1629 tiocmget = serial->tiocmget; 1630 if (tiocmget) { 1631 1632 UART_state_bitmap = le16_to_cpu( 1633 tiocmget->prev_UART_state_bitmap); 1634 if (UART_state_bitmap & B_RING_SIGNAL) 1635 retval |= TIOCM_RNG; 1636 if (UART_state_bitmap & B_RX_CARRIER) 1637 retval |= TIOCM_CD; 1638 if (UART_state_bitmap & B_TX_CARRIER) 1639 retval |= TIOCM_DSR; 1640 } 1641 spin_unlock_irq(&serial->serial_lock); 1642 return retval; 1643} 1644 1645static int hso_serial_tiocmset(struct tty_struct *tty, 1646 unsigned int set, unsigned int clear) 1647{ 1648 int val = 0; 1649 unsigned long flags; 1650 int if_num; 1651 struct hso_serial *serial = tty->driver_data; 1652 struct usb_interface *interface; 1653 1654 /* sanity check */ 1655 if (!serial) { 1656 hso_dbg(0x1, "no tty structures\n"); 1657 return -EINVAL; 1658 } 1659 1660 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1661 return -EINVAL; 1662 1663 interface = serial->parent->interface; 1664 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1665 1666 spin_lock_irqsave(&serial->serial_lock, flags); 1667 if (set & TIOCM_RTS) 1668 serial->rts_state = 1; 1669 if (set & TIOCM_DTR) 1670 serial->dtr_state = 1; 1671 1672 if (clear & TIOCM_RTS) 1673 serial->rts_state = 0; 1674 if (clear & TIOCM_DTR) 1675 serial->dtr_state = 0; 1676 1677 if (serial->dtr_state) 1678 val |= 0x01; 1679 if (serial->rts_state) 1680 val |= 0x02; 1681 1682 spin_unlock_irqrestore(&serial->serial_lock, flags); 1683 1684 return usb_control_msg(serial->parent->usb, 1685 usb_sndctrlpipe(serial->parent->usb, 0), 0x22, 1686 0x21, val, if_num, NULL, 0, 1687 USB_CTRL_SET_TIMEOUT); 1688} 1689 1690static int hso_serial_ioctl(struct tty_struct *tty, 1691 unsigned int cmd, unsigned long arg) 1692{ 1693 struct hso_serial *serial = tty->driver_data; 1694 int ret = 0; 1695 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1696 1697 if (!serial) 1698 return -ENODEV; 1699 switch (cmd) { 1700 case TIOCMIWAIT: 1701 ret = hso_wait_modem_status(serial, arg); 1702 break; 1703 default: 1704 ret = -ENOIOCTLCMD; 1705 break; 1706 } 1707 return ret; 1708} 1709 1710 1711/* starts a transmit */ 1712static void hso_kick_transmit(struct hso_serial *serial) 1713{ 1714 unsigned long flags; 1715 int res; 1716 1717 spin_lock_irqsave(&serial->serial_lock, flags); 1718 if (!serial->tx_buffer_count) 1719 goto out; 1720 1721 if (serial->tx_urb_used) 1722 goto out; 1723 1724 /* Wakeup USB interface if necessary */ 1725 if (hso_get_activity(serial->parent) == -EAGAIN) 1726 goto out; 1727 1728 /* Switch pointers around to avoid memcpy */ 1729 swap(serial->tx_buffer, serial->tx_data); 1730 serial->tx_data_count = serial->tx_buffer_count; 1731 serial->tx_buffer_count = 0; 1732 1733 /* If serial->tx_data is set, it means we switched buffers */ 1734 if (serial->tx_data && serial->write_data) { 1735 res = serial->write_data(serial); 1736 if (res >= 0) 1737 serial->tx_urb_used = 1; 1738 } 1739out: 1740 spin_unlock_irqrestore(&serial->serial_lock, flags); 1741} 1742 1743/* make a request (for reading and writing data to muxed serial port) */ 1744static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1745 struct urb *ctrl_urb, 1746 struct usb_ctrlrequest *ctrl_req, 1747 u8 *ctrl_urb_data, u32 size) 1748{ 1749 int result; 1750 int pipe; 1751 1752 /* Sanity check */ 1753 if (!serial || !ctrl_urb || !ctrl_req) { 1754 pr_err("%s: Wrong arguments\n", __func__); 1755 return -EINVAL; 1756 } 1757 1758 /* initialize */ 1759 ctrl_req->wValue = 0; 1760 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1761 ctrl_req->wLength = cpu_to_le16(size); 1762 1763 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1764 /* Reading command */ 1765 ctrl_req->bRequestType = USB_DIR_IN | 1766 USB_TYPE_OPTION_VENDOR | 1767 USB_RECIP_INTERFACE; 1768 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1769 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1770 } else { 1771 /* Writing command */ 1772 ctrl_req->bRequestType = USB_DIR_OUT | 1773 USB_TYPE_OPTION_VENDOR | 1774 USB_RECIP_INTERFACE; 1775 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1776 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1777 } 1778 /* syslog */ 1779 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1780 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1781 ctrl_req->bRequestType, ctrl_req->wLength, port); 1782 1783 /* Load ctrl urb */ 1784 ctrl_urb->transfer_flags = 0; 1785 usb_fill_control_urb(ctrl_urb, 1786 serial->parent->usb, 1787 pipe, 1788 (u8 *) ctrl_req, 1789 ctrl_urb_data, size, ctrl_callback, serial); 1790 /* Send it on merry way */ 1791 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1792 if (result) { 1793 dev_err(&ctrl_urb->dev->dev, 1794 "%s failed submit ctrl_urb %d type %d\n", __func__, 1795 result, type); 1796 return result; 1797 } 1798 1799 /* done */ 1800 return size; 1801} 1802 1803/* called by intr_callback when read occurs */ 1804static int hso_mux_serial_read(struct hso_serial *serial) 1805{ 1806 if (!serial) 1807 return -EINVAL; 1808 1809 /* clean data */ 1810 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1811 /* make the request */ 1812 1813 if (serial->num_rx_urbs != 1) { 1814 dev_err(&serial->parent->interface->dev, 1815 "ERROR: mux'd reads with multiple buffers " 1816 "not possible\n"); 1817 return 0; 1818 } 1819 return mux_device_request(serial, 1820 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1821 serial->parent->port_spec & HSO_PORT_MASK, 1822 serial->rx_urb[0], 1823 &serial->ctrl_req_rx, 1824 serial->rx_data[0], serial->rx_data_length); 1825} 1826 1827/* used for muxed serial port callback (muxed serial read) */ 1828static void intr_callback(struct urb *urb) 1829{ 1830 struct hso_shared_int *shared_int = urb->context; 1831 struct hso_serial *serial; 1832 unsigned char *port_req; 1833 int status = urb->status; 1834 unsigned long flags; 1835 int i; 1836 1837 usb_mark_last_busy(urb->dev); 1838 1839 /* sanity check */ 1840 if (!shared_int) 1841 return; 1842 1843 /* status check */ 1844 if (status) { 1845 handle_usb_error(status, __func__, NULL); 1846 return; 1847 } 1848 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1849 1850 /* what request? */ 1851 port_req = urb->transfer_buffer; 1852 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1853 /* loop over all muxed ports to find the one sending this */ 1854 for (i = 0; i < 8; i++) { 1855 /* max 8 channels on MUX */ 1856 if (*port_req & (1 << i)) { 1857 serial = get_serial_by_shared_int_and_type(shared_int, 1858 (1 << i)); 1859 if (serial != NULL) { 1860 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1861 i); 1862 spin_lock_irqsave(&serial->serial_lock, flags); 1863 if (serial->rx_state == RX_IDLE && 1864 serial->port.count > 0) { 1865 /* Setup and send a ctrl req read on 1866 * port i */ 1867 if (!serial->rx_urb_filled[0]) { 1868 serial->rx_state = RX_SENT; 1869 hso_mux_serial_read(serial); 1870 } else 1871 serial->rx_state = RX_PENDING; 1872 } else { 1873 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1874 i); 1875 } 1876 spin_unlock_irqrestore(&serial->serial_lock, 1877 flags); 1878 } 1879 } 1880 } 1881 /* Resubmit interrupt urb */ 1882 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1883} 1884 1885/* called for writing to muxed serial port */ 1886static int hso_mux_serial_write_data(struct hso_serial *serial) 1887{ 1888 if (NULL == serial) 1889 return -EINVAL; 1890 1891 return mux_device_request(serial, 1892 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1893 serial->parent->port_spec & HSO_PORT_MASK, 1894 serial->tx_urb, 1895 &serial->ctrl_req_tx, 1896 serial->tx_data, serial->tx_data_count); 1897} 1898 1899/* write callback for Diag and CS port */ 1900static void hso_std_serial_write_bulk_callback(struct urb *urb) 1901{ 1902 struct hso_serial *serial = urb->context; 1903 int status = urb->status; 1904 unsigned long flags; 1905 1906 /* sanity check */ 1907 if (!serial) { 1908 hso_dbg(0x1, "serial == NULL\n"); 1909 return; 1910 } 1911 1912 spin_lock_irqsave(&serial->serial_lock, flags); 1913 serial->tx_urb_used = 0; 1914 spin_unlock_irqrestore(&serial->serial_lock, flags); 1915 if (status) { 1916 handle_usb_error(status, __func__, serial->parent); 1917 return; 1918 } 1919 hso_put_activity(serial->parent); 1920 tty_port_tty_wakeup(&serial->port); 1921 hso_kick_transmit(serial); 1922 1923 hso_dbg(0x1, "\n"); 1924} 1925 1926/* called for writing diag or CS serial port */ 1927static int hso_std_serial_write_data(struct hso_serial *serial) 1928{ 1929 int count = serial->tx_data_count; 1930 int result; 1931 1932 usb_fill_bulk_urb(serial->tx_urb, 1933 serial->parent->usb, 1934 usb_sndbulkpipe(serial->parent->usb, 1935 serial->out_endp-> 1936 bEndpointAddress & 0x7F), 1937 serial->tx_data, serial->tx_data_count, 1938 hso_std_serial_write_bulk_callback, serial); 1939 1940 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1941 if (result) { 1942 dev_warn(&serial->parent->usb->dev, 1943 "Failed to submit urb - res %d\n", result); 1944 return result; 1945 } 1946 1947 return count; 1948} 1949 1950/* callback after read or write on muxed serial port */ 1951static void ctrl_callback(struct urb *urb) 1952{ 1953 struct hso_serial *serial = urb->context; 1954 struct usb_ctrlrequest *req; 1955 int status = urb->status; 1956 unsigned long flags; 1957 1958 /* sanity check */ 1959 if (!serial) 1960 return; 1961 1962 spin_lock_irqsave(&serial->serial_lock, flags); 1963 serial->tx_urb_used = 0; 1964 spin_unlock_irqrestore(&serial->serial_lock, flags); 1965 if (status) { 1966 handle_usb_error(status, __func__, serial->parent); 1967 return; 1968 } 1969 1970 /* what request? */ 1971 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1972 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1973 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1974 DUMP1(urb->transfer_buffer, urb->actual_length); 1975 1976 if (req->bRequestType == 1977 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1978 /* response to a read command */ 1979 serial->rx_urb_filled[0] = 1; 1980 spin_lock_irqsave(&serial->serial_lock, flags); 1981 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1982 spin_unlock_irqrestore(&serial->serial_lock, flags); 1983 } else { 1984 hso_put_activity(serial->parent); 1985 tty_port_tty_wakeup(&serial->port); 1986 /* response to a write command */ 1987 hso_kick_transmit(serial); 1988 } 1989} 1990 1991/* handle RX data for serial port */ 1992static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 1993{ 1994 struct tty_struct *tty; 1995 int count; 1996 1997 /* Sanity check */ 1998 if (urb == NULL || serial == NULL) { 1999 hso_dbg(0x1, "serial = NULL\n"); 2000 return -2; 2001 } 2002 2003 tty = tty_port_tty_get(&serial->port); 2004 2005 if (tty && tty_throttled(tty)) { 2006 tty_kref_put(tty); 2007 return -1; 2008 } 2009 2010 /* Push data to tty */ 2011 hso_dbg(0x1, "data to push to tty\n"); 2012 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2013 if (count >= urb->actual_length) { 2014 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2015 urb->actual_length); 2016 tty_flip_buffer_push(&serial->port); 2017 } else { 2018 dev_warn(&serial->parent->usb->dev, 2019 "dropping data, %d bytes lost\n", urb->actual_length); 2020 } 2021 2022 tty_kref_put(tty); 2023 2024 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2025 2026 return 0; 2027} 2028 2029 2030/* Base driver functions */ 2031 2032static void hso_log_port(struct hso_device *hso_dev) 2033{ 2034 char *port_type; 2035 char port_dev[20]; 2036 2037 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2038 case HSO_PORT_CONTROL: 2039 port_type = "Control"; 2040 break; 2041 case HSO_PORT_APP: 2042 port_type = "Application"; 2043 break; 2044 case HSO_PORT_GPS: 2045 port_type = "GPS"; 2046 break; 2047 case HSO_PORT_GPS_CONTROL: 2048 port_type = "GPS control"; 2049 break; 2050 case HSO_PORT_APP2: 2051 port_type = "Application2"; 2052 break; 2053 case HSO_PORT_PCSC: 2054 port_type = "PCSC"; 2055 break; 2056 case HSO_PORT_DIAG: 2057 port_type = "Diagnostic"; 2058 break; 2059 case HSO_PORT_DIAG2: 2060 port_type = "Diagnostic2"; 2061 break; 2062 case HSO_PORT_MODEM: 2063 port_type = "Modem"; 2064 break; 2065 case HSO_PORT_NETWORK: 2066 port_type = "Network"; 2067 break; 2068 default: 2069 port_type = "Unknown"; 2070 break; 2071 } 2072 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2073 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2074 } else 2075 sprintf(port_dev, "/dev/%s%d", tty_filename, 2076 dev2ser(hso_dev)->minor); 2077 2078 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2079 port_type, port_dev); 2080} 2081 2082static int hso_start_net_device(struct hso_device *hso_dev) 2083{ 2084 int i, result = 0; 2085 struct hso_net *hso_net = dev2net(hso_dev); 2086 2087 if (!hso_net) 2088 return -ENODEV; 2089 2090 /* send URBs for all read buffers */ 2091 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2092 2093 /* Prep a receive URB */ 2094 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2095 hso_dev->usb, 2096 usb_rcvbulkpipe(hso_dev->usb, 2097 hso_net->in_endp-> 2098 bEndpointAddress & 0x7F), 2099 hso_net->mux_bulk_rx_buf_pool[i], 2100 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2101 hso_net); 2102 2103 /* Put it out there so the device can send us stuff */ 2104 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2105 GFP_NOIO); 2106 if (result) 2107 dev_warn(&hso_dev->usb->dev, 2108 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2109 i, result); 2110 } 2111 2112 return result; 2113} 2114 2115static int hso_stop_net_device(struct hso_device *hso_dev) 2116{ 2117 int i; 2118 struct hso_net *hso_net = dev2net(hso_dev); 2119 2120 if (!hso_net) 2121 return -ENODEV; 2122 2123 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2124 if (hso_net->mux_bulk_rx_urb_pool[i]) 2125 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2126 2127 } 2128 if (hso_net->mux_bulk_tx_urb) 2129 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2130 2131 return 0; 2132} 2133 2134static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2135{ 2136 int i, result = 0; 2137 struct hso_serial *serial = dev2ser(hso_dev); 2138 2139 if (!serial) 2140 return -ENODEV; 2141 2142 /* If it is not the MUX port fill in and submit a bulk urb (already 2143 * allocated in hso_serial_start) */ 2144 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2145 for (i = 0; i < serial->num_rx_urbs; i++) { 2146 usb_fill_bulk_urb(serial->rx_urb[i], 2147 serial->parent->usb, 2148 usb_rcvbulkpipe(serial->parent->usb, 2149 serial->in_endp-> 2150 bEndpointAddress & 2151 0x7F), 2152 serial->rx_data[i], 2153 serial->rx_data_length, 2154 hso_std_serial_read_bulk_callback, 2155 serial); 2156 result = usb_submit_urb(serial->rx_urb[i], flags); 2157 if (result) { 2158 dev_warn(&serial->parent->usb->dev, 2159 "Failed to submit urb - res %d\n", 2160 result); 2161 break; 2162 } 2163 } 2164 } else { 2165 mutex_lock(&serial->shared_int->shared_int_lock); 2166 if (!serial->shared_int->use_count) { 2167 result = 2168 hso_mux_submit_intr_urb(serial->shared_int, 2169 hso_dev->usb, flags); 2170 } 2171 serial->shared_int->use_count++; 2172 mutex_unlock(&serial->shared_int->shared_int_lock); 2173 } 2174 if (serial->tiocmget) 2175 tiocmget_submit_urb(serial, 2176 serial->tiocmget, 2177 serial->parent->usb); 2178 return result; 2179} 2180 2181static int hso_stop_serial_device(struct hso_device *hso_dev) 2182{ 2183 int i; 2184 struct hso_serial *serial = dev2ser(hso_dev); 2185 struct hso_tiocmget *tiocmget; 2186 2187 if (!serial) 2188 return -ENODEV; 2189 2190 for (i = 0; i < serial->num_rx_urbs; i++) { 2191 if (serial->rx_urb[i]) { 2192 usb_kill_urb(serial->rx_urb[i]); 2193 serial->rx_urb_filled[i] = 0; 2194 } 2195 } 2196 serial->curr_rx_urb_idx = 0; 2197 2198 if (serial->tx_urb) 2199 usb_kill_urb(serial->tx_urb); 2200 2201 if (serial->shared_int) { 2202 mutex_lock(&serial->shared_int->shared_int_lock); 2203 if (serial->shared_int->use_count && 2204 (--serial->shared_int->use_count == 0)) { 2205 struct urb *urb; 2206 2207 urb = serial->shared_int->shared_intr_urb; 2208 if (urb) 2209 usb_kill_urb(urb); 2210 } 2211 mutex_unlock(&serial->shared_int->shared_int_lock); 2212 } 2213 tiocmget = serial->tiocmget; 2214 if (tiocmget) { 2215 wake_up_interruptible(&tiocmget->waitq); 2216 usb_kill_urb(tiocmget->urb); 2217 } 2218 2219 return 0; 2220} 2221 2222static void hso_serial_tty_unregister(struct hso_serial *serial) 2223{ 2224 tty_unregister_device(tty_drv, serial->minor); 2225 release_minor(serial); 2226} 2227 2228static void hso_serial_common_free(struct hso_serial *serial) 2229{ 2230 int i; 2231 2232 for (i = 0; i < serial->num_rx_urbs; i++) { 2233 /* unlink and free RX URB */ 2234 usb_free_urb(serial->rx_urb[i]); 2235 /* free the RX buffer */ 2236 kfree(serial->rx_data[i]); 2237 } 2238 2239 /* unlink and free TX URB */ 2240 usb_free_urb(serial->tx_urb); 2241 kfree(serial->tx_buffer); 2242 kfree(serial->tx_data); 2243 tty_port_destroy(&serial->port); 2244} 2245 2246static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2247 int rx_size, int tx_size) 2248{ 2249 int i; 2250 2251 tty_port_init(&serial->port); 2252 2253 if (obtain_minor(serial)) 2254 goto exit2; 2255 2256 /* register our minor number */ 2257 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2258 tty_drv, serial->minor, &serial->parent->interface->dev, 2259 serial->parent, hso_serial_dev_groups); 2260 if (IS_ERR(serial->parent->dev)) { 2261 release_minor(serial); 2262 goto exit2; 2263 } 2264 2265 serial->magic = HSO_SERIAL_MAGIC; 2266 spin_lock_init(&serial->serial_lock); 2267 serial->num_rx_urbs = num_urbs; 2268 2269 /* RX, allocate urb and initialize */ 2270 2271 /* prepare our RX buffer */ 2272 serial->rx_data_length = rx_size; 2273 for (i = 0; i < serial->num_rx_urbs; i++) { 2274 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2275 if (!serial->rx_urb[i]) 2276 goto exit; 2277 serial->rx_urb[i]->transfer_buffer = NULL; 2278 serial->rx_urb[i]->transfer_buffer_length = 0; 2279 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2280 GFP_KERNEL); 2281 if (!serial->rx_data[i]) 2282 goto exit; 2283 } 2284 2285 /* TX, allocate urb and initialize */ 2286 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2287 if (!serial->tx_urb) 2288 goto exit; 2289 serial->tx_urb->transfer_buffer = NULL; 2290 serial->tx_urb->transfer_buffer_length = 0; 2291 /* prepare our TX buffer */ 2292 serial->tx_data_count = 0; 2293 serial->tx_buffer_count = 0; 2294 serial->tx_data_length = tx_size; 2295 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2296 if (!serial->tx_data) 2297 goto exit; 2298 2299 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2300 if (!serial->tx_buffer) 2301 goto exit; 2302 2303 return 0; 2304exit: 2305 hso_serial_tty_unregister(serial); 2306exit2: 2307 hso_serial_common_free(serial); 2308 return -1; 2309} 2310 2311/* Creates a general hso device */ 2312static struct hso_device *hso_create_device(struct usb_interface *intf, 2313 int port_spec) 2314{ 2315 struct hso_device *hso_dev; 2316 2317 hso_dev = kzalloc(sizeof(*hso_dev), GFP_KERNEL); 2318 if (!hso_dev) 2319 return NULL; 2320 2321 hso_dev->port_spec = port_spec; 2322 hso_dev->usb = interface_to_usbdev(intf); 2323 hso_dev->interface = intf; 2324 kref_init(&hso_dev->ref); 2325 mutex_init(&hso_dev->mutex); 2326 2327 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2328 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2329 2330 return hso_dev; 2331} 2332 2333/* Removes a network device in the network device table */ 2334static int remove_net_device(struct hso_device *hso_dev) 2335{ 2336 int i; 2337 2338 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2339 if (network_table[i] == hso_dev) { 2340 network_table[i] = NULL; 2341 break; 2342 } 2343 } 2344 if (i == HSO_MAX_NET_DEVICES) 2345 return -1; 2346 return 0; 2347} 2348 2349/* Frees our network device */ 2350static void hso_free_net_device(struct hso_device *hso_dev) 2351{ 2352 int i; 2353 struct hso_net *hso_net = dev2net(hso_dev); 2354 2355 if (!hso_net) 2356 return; 2357 2358 remove_net_device(hso_net->parent); 2359 2360 if (hso_net->net) 2361 unregister_netdev(hso_net->net); 2362 2363 /* start freeing */ 2364 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2365 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2366 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2367 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2368 } 2369 usb_free_urb(hso_net->mux_bulk_tx_urb); 2370 kfree(hso_net->mux_bulk_tx_buf); 2371 hso_net->mux_bulk_tx_buf = NULL; 2372 2373 if (hso_net->net) 2374 free_netdev(hso_net->net); 2375 2376 kfree(hso_dev); 2377} 2378 2379static const struct net_device_ops hso_netdev_ops = { 2380 .ndo_open = hso_net_open, 2381 .ndo_stop = hso_net_close, 2382 .ndo_start_xmit = hso_net_start_xmit, 2383 .ndo_tx_timeout = hso_net_tx_timeout, 2384}; 2385 2386/* initialize the network interface */ 2387static void hso_net_init(struct net_device *net) 2388{ 2389 struct hso_net *hso_net = netdev_priv(net); 2390 2391 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2392 2393 /* fill in the other fields */ 2394 net->netdev_ops = &hso_netdev_ops; 2395 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2396 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2397 net->type = ARPHRD_NONE; 2398 net->mtu = DEFAULT_MTU - 14; 2399 net->tx_queue_len = 10; 2400 net->ethtool_ops = &ops; 2401 2402 /* and initialize the semaphore */ 2403 spin_lock_init(&hso_net->net_lock); 2404} 2405 2406/* Adds a network device in the network device table */ 2407static int add_net_device(struct hso_device *hso_dev) 2408{ 2409 int i; 2410 2411 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2412 if (network_table[i] == NULL) { 2413 network_table[i] = hso_dev; 2414 break; 2415 } 2416 } 2417 if (i == HSO_MAX_NET_DEVICES) 2418 return -1; 2419 return 0; 2420} 2421 2422static int hso_rfkill_set_block(void *data, bool blocked) 2423{ 2424 struct hso_device *hso_dev = data; 2425 int enabled = !blocked; 2426 int rv; 2427 2428 mutex_lock(&hso_dev->mutex); 2429 if (hso_dev->usb_gone) 2430 rv = 0; 2431 else 2432 rv = usb_control_msg(hso_dev->usb, usb_sndctrlpipe(hso_dev->usb, 0), 2433 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2434 USB_CTRL_SET_TIMEOUT); 2435 mutex_unlock(&hso_dev->mutex); 2436 return rv; 2437} 2438 2439static const struct rfkill_ops hso_rfkill_ops = { 2440 .set_block = hso_rfkill_set_block, 2441}; 2442 2443/* Creates and sets up everything for rfkill */ 2444static void hso_create_rfkill(struct hso_device *hso_dev, 2445 struct usb_interface *interface) 2446{ 2447 struct hso_net *hso_net = dev2net(hso_dev); 2448 struct device *dev = &hso_net->net->dev; 2449 static u32 rfkill_counter; 2450 2451 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2452 rfkill_counter++); 2453 2454 hso_net->rfkill = rfkill_alloc(hso_net->name, 2455 &interface_to_usbdev(interface)->dev, 2456 RFKILL_TYPE_WWAN, 2457 &hso_rfkill_ops, hso_dev); 2458 if (!hso_net->rfkill) 2459 return; 2460 2461 if (rfkill_register(hso_net->rfkill) < 0) { 2462 rfkill_destroy(hso_net->rfkill); 2463 hso_net->rfkill = NULL; 2464 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2465 return; 2466 } 2467} 2468 2469static struct device_type hso_type = { 2470 .name = "wwan", 2471}; 2472 2473/* Creates our network device */ 2474static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2475 int port_spec) 2476{ 2477 int result, i; 2478 struct net_device *net; 2479 struct hso_net *hso_net; 2480 struct hso_device *hso_dev; 2481 2482 hso_dev = hso_create_device(interface, port_spec); 2483 if (!hso_dev) 2484 return NULL; 2485 2486 /* allocate our network device, then we can put in our private data */ 2487 /* call hso_net_init to do the basic initialization */ 2488 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2489 hso_net_init); 2490 if (!net) { 2491 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2492 goto err_hso_dev; 2493 } 2494 2495 hso_net = netdev_priv(net); 2496 2497 hso_dev->port_data.dev_net = hso_net; 2498 hso_net->net = net; 2499 hso_net->parent = hso_dev; 2500 2501 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2502 USB_DIR_IN); 2503 if (!hso_net->in_endp) { 2504 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2505 goto err_net; 2506 } 2507 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2508 USB_DIR_OUT); 2509 if (!hso_net->out_endp) { 2510 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2511 goto err_net; 2512 } 2513 SET_NETDEV_DEV(net, &interface->dev); 2514 SET_NETDEV_DEVTYPE(net, &hso_type); 2515 2516 /* start allocating */ 2517 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2518 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2519 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2520 goto err_mux_bulk_rx; 2521 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2522 GFP_KERNEL); 2523 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2524 goto err_mux_bulk_rx; 2525 } 2526 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2527 if (!hso_net->mux_bulk_tx_urb) 2528 goto err_mux_bulk_rx; 2529 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2530 if (!hso_net->mux_bulk_tx_buf) 2531 goto err_free_tx_urb; 2532 2533 result = add_net_device(hso_dev); 2534 if (result) { 2535 dev_err(&interface->dev, "Failed to add net device\n"); 2536 goto err_free_tx_buf; 2537 } 2538 2539 /* registering our net device */ 2540 result = register_netdev(net); 2541 if (result) { 2542 dev_err(&interface->dev, "Failed to register device\n"); 2543 goto err_rmv_ndev; 2544 } 2545 2546 hso_log_port(hso_dev); 2547 2548 hso_create_rfkill(hso_dev, interface); 2549 2550 return hso_dev; 2551 2552err_rmv_ndev: 2553 remove_net_device(hso_dev); 2554err_free_tx_buf: 2555 kfree(hso_net->mux_bulk_tx_buf); 2556err_free_tx_urb: 2557 usb_free_urb(hso_net->mux_bulk_tx_urb); 2558err_mux_bulk_rx: 2559 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2560 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2561 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2562 } 2563err_net: 2564 free_netdev(net); 2565err_hso_dev: 2566 kfree(hso_dev); 2567 return NULL; 2568} 2569 2570static void hso_free_tiomget(struct hso_serial *serial) 2571{ 2572 struct hso_tiocmget *tiocmget; 2573 if (!serial) 2574 return; 2575 tiocmget = serial->tiocmget; 2576 if (tiocmget) { 2577 usb_free_urb(tiocmget->urb); 2578 tiocmget->urb = NULL; 2579 serial->tiocmget = NULL; 2580 kfree(tiocmget->serial_state_notification); 2581 tiocmget->serial_state_notification = NULL; 2582 kfree(tiocmget); 2583 } 2584} 2585 2586/* Frees an AT channel ( goes for both mux and non-mux ) */ 2587static void hso_free_serial_device(struct hso_device *hso_dev) 2588{ 2589 struct hso_serial *serial = dev2ser(hso_dev); 2590 2591 if (!serial) 2592 return; 2593 2594 hso_serial_common_free(serial); 2595 2596 if (serial->shared_int) { 2597 mutex_lock(&serial->shared_int->shared_int_lock); 2598 if (--serial->shared_int->ref_count == 0) 2599 hso_free_shared_int(serial->shared_int); 2600 else 2601 mutex_unlock(&serial->shared_int->shared_int_lock); 2602 } 2603 hso_free_tiomget(serial); 2604 kfree(serial); 2605 kfree(hso_dev); 2606} 2607 2608/* Creates a bulk AT channel */ 2609static struct hso_device *hso_create_bulk_serial_device( 2610 struct usb_interface *interface, int port) 2611{ 2612 struct hso_device *hso_dev; 2613 struct hso_serial *serial; 2614 int num_urbs; 2615 struct hso_tiocmget *tiocmget; 2616 2617 hso_dev = hso_create_device(interface, port); 2618 if (!hso_dev) 2619 return NULL; 2620 2621 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2622 if (!serial) 2623 goto exit; 2624 2625 serial->parent = hso_dev; 2626 hso_dev->port_data.dev_serial = serial; 2627 2628 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2629 num_urbs = 2; 2630 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2631 GFP_KERNEL); 2632 if (!serial->tiocmget) 2633 goto exit; 2634 serial->tiocmget->serial_state_notification 2635 = kzalloc(sizeof(struct hso_serial_state_notification), 2636 GFP_KERNEL); 2637 if (!serial->tiocmget->serial_state_notification) 2638 goto exit; 2639 tiocmget = serial->tiocmget; 2640 tiocmget->endp = hso_get_ep(interface, 2641 USB_ENDPOINT_XFER_INT, 2642 USB_DIR_IN); 2643 if (!tiocmget->endp) { 2644 dev_err(&interface->dev, "Failed to find INT IN ep\n"); 2645 goto exit; 2646 } 2647 2648 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2649 if (!tiocmget->urb) 2650 goto exit; 2651 2652 mutex_init(&tiocmget->mutex); 2653 init_waitqueue_head(&tiocmget->waitq); 2654 } else { 2655 num_urbs = 1; 2656 } 2657 2658 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2659 BULK_URB_TX_SIZE)) 2660 goto exit; 2661 2662 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2663 USB_DIR_IN); 2664 if (!serial->in_endp) { 2665 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2666 goto exit2; 2667 } 2668 2669 if (! 2670 (serial->out_endp = 2671 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2672 dev_err(&interface->dev, "Failed to find BULK OUT ep\n"); 2673 goto exit2; 2674 } 2675 2676 serial->write_data = hso_std_serial_write_data; 2677 2678 /* setup the proc dirs and files if needed */ 2679 hso_log_port(hso_dev); 2680 2681 /* done, return it */ 2682 return hso_dev; 2683 2684exit2: 2685 hso_serial_tty_unregister(serial); 2686 hso_serial_common_free(serial); 2687exit: 2688 hso_free_tiomget(serial); 2689 kfree(serial); 2690 kfree(hso_dev); 2691 return NULL; 2692} 2693 2694/* Creates a multiplexed AT channel */ 2695static 2696struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2697 int port, 2698 struct hso_shared_int *mux) 2699{ 2700 struct hso_device *hso_dev; 2701 struct hso_serial *serial; 2702 int port_spec; 2703 2704 port_spec = HSO_INTF_MUX; 2705 port_spec &= ~HSO_PORT_MASK; 2706 2707 port_spec |= hso_mux_to_port(port); 2708 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2709 return NULL; 2710 2711 hso_dev = hso_create_device(interface, port_spec); 2712 if (!hso_dev) 2713 return NULL; 2714 2715 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2716 if (!serial) 2717 goto err_free_dev; 2718 2719 hso_dev->port_data.dev_serial = serial; 2720 serial->parent = hso_dev; 2721 2722 if (hso_serial_common_create 2723 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2724 goto err_free_serial; 2725 2726 serial->tx_data_length--; 2727 serial->write_data = hso_mux_serial_write_data; 2728 2729 serial->shared_int = mux; 2730 mutex_lock(&serial->shared_int->shared_int_lock); 2731 serial->shared_int->ref_count++; 2732 mutex_unlock(&serial->shared_int->shared_int_lock); 2733 2734 /* setup the proc dirs and files if needed */ 2735 hso_log_port(hso_dev); 2736 2737 /* done, return it */ 2738 return hso_dev; 2739 2740err_free_serial: 2741 kfree(serial); 2742err_free_dev: 2743 kfree(hso_dev); 2744 return NULL; 2745 2746} 2747 2748static void hso_free_shared_int(struct hso_shared_int *mux) 2749{ 2750 usb_free_urb(mux->shared_intr_urb); 2751 kfree(mux->shared_intr_buf); 2752 mutex_unlock(&mux->shared_int_lock); 2753 kfree(mux); 2754} 2755 2756static 2757struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2758{ 2759 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2760 2761 if (!mux) 2762 return NULL; 2763 2764 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2765 USB_DIR_IN); 2766 if (!mux->intr_endp) { 2767 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2768 goto exit; 2769 } 2770 2771 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2772 if (!mux->shared_intr_urb) 2773 goto exit; 2774 mux->shared_intr_buf = 2775 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2776 GFP_KERNEL); 2777 if (!mux->shared_intr_buf) 2778 goto exit; 2779 2780 mutex_init(&mux->shared_int_lock); 2781 2782 return mux; 2783 2784exit: 2785 kfree(mux->shared_intr_buf); 2786 usb_free_urb(mux->shared_intr_urb); 2787 kfree(mux); 2788 return NULL; 2789} 2790 2791/* Gets the port spec for a certain interface */ 2792static int hso_get_config_data(struct usb_interface *interface) 2793{ 2794 struct usb_device *usbdev = interface_to_usbdev(interface); 2795 u8 *config_data = kmalloc(17, GFP_KERNEL); 2796 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2797 s32 result; 2798 2799 if (!config_data) 2800 return -ENOMEM; 2801 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2802 0x86, 0xC0, 0, 0, config_data, 17, 2803 USB_CTRL_SET_TIMEOUT) != 0x11) { 2804 kfree(config_data); 2805 return -EIO; 2806 } 2807 2808 /* check if we have a valid interface */ 2809 if (if_num > 16) { 2810 kfree(config_data); 2811 return -EINVAL; 2812 } 2813 2814 switch (config_data[if_num]) { 2815 case 0x0: 2816 result = 0; 2817 break; 2818 case 0x1: 2819 result = HSO_PORT_DIAG; 2820 break; 2821 case 0x2: 2822 result = HSO_PORT_GPS; 2823 break; 2824 case 0x3: 2825 result = HSO_PORT_GPS_CONTROL; 2826 break; 2827 case 0x4: 2828 result = HSO_PORT_APP; 2829 break; 2830 case 0x5: 2831 result = HSO_PORT_APP2; 2832 break; 2833 case 0x6: 2834 result = HSO_PORT_CONTROL; 2835 break; 2836 case 0x7: 2837 result = HSO_PORT_NETWORK; 2838 break; 2839 case 0x8: 2840 result = HSO_PORT_MODEM; 2841 break; 2842 case 0x9: 2843 result = HSO_PORT_MSD; 2844 break; 2845 case 0xa: 2846 result = HSO_PORT_PCSC; 2847 break; 2848 case 0xb: 2849 result = HSO_PORT_VOICE; 2850 break; 2851 default: 2852 result = 0; 2853 } 2854 2855 if (result) 2856 result |= HSO_INTF_BULK; 2857 2858 if (config_data[16] & 0x1) 2859 result |= HSO_INFO_CRC_BUG; 2860 2861 kfree(config_data); 2862 return result; 2863} 2864 2865/* called once for each interface upon device insertion */ 2866static int hso_probe(struct usb_interface *interface, 2867 const struct usb_device_id *id) 2868{ 2869 int mux, i, if_num, port_spec; 2870 unsigned char port_mask; 2871 struct hso_device *hso_dev = NULL; 2872 struct hso_shared_int *shared_int; 2873 struct hso_device *tmp_dev = NULL; 2874 2875 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2876 dev_err(&interface->dev, "Not our interface\n"); 2877 return -ENODEV; 2878 } 2879 2880 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2881 2882 /* Get the interface/port specification from either driver_info or from 2883 * the device itself */ 2884 if (id->driver_info) { 2885 /* if_num is controlled by the device, driver_info is a 0 terminated 2886 * array. Make sure, the access is in bounds! */ 2887 for (i = 0; i <= if_num; ++i) 2888 if (((u32 *)(id->driver_info))[i] == 0) 2889 goto exit; 2890 port_spec = ((u32 *)(id->driver_info))[if_num]; 2891 } else { 2892 port_spec = hso_get_config_data(interface); 2893 if (port_spec < 0) 2894 goto exit; 2895 } 2896 2897 /* Check if we need to switch to alt interfaces prior to port 2898 * configuration */ 2899 if (interface->num_altsetting > 1) 2900 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2901 interface->needs_remote_wakeup = 1; 2902 2903 /* Allocate new hso device(s) */ 2904 switch (port_spec & HSO_INTF_MASK) { 2905 case HSO_INTF_MUX: 2906 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2907 /* Create the network device */ 2908 if (!disable_net) { 2909 hso_dev = hso_create_net_device(interface, 2910 port_spec); 2911 if (!hso_dev) 2912 goto exit; 2913 tmp_dev = hso_dev; 2914 } 2915 } 2916 2917 if (hso_get_mux_ports(interface, &port_mask)) 2918 /* TODO: de-allocate everything */ 2919 goto exit; 2920 2921 shared_int = hso_create_shared_int(interface); 2922 if (!shared_int) 2923 goto exit; 2924 2925 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2926 if (port_mask & i) { 2927 hso_dev = hso_create_mux_serial_device( 2928 interface, i, shared_int); 2929 if (!hso_dev) 2930 goto exit; 2931 } 2932 } 2933 2934 if (tmp_dev) 2935 hso_dev = tmp_dev; 2936 break; 2937 2938 case HSO_INTF_BULK: 2939 /* It's a regular bulk interface */ 2940 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2941 if (!disable_net) 2942 hso_dev = 2943 hso_create_net_device(interface, port_spec); 2944 } else { 2945 hso_dev = 2946 hso_create_bulk_serial_device(interface, port_spec); 2947 } 2948 if (!hso_dev) 2949 goto exit; 2950 break; 2951 default: 2952 goto exit; 2953 } 2954 2955 /* save our data pointer in this device */ 2956 usb_set_intfdata(interface, hso_dev); 2957 2958 /* done */ 2959 return 0; 2960exit: 2961 hso_free_interface(interface); 2962 return -ENODEV; 2963} 2964 2965/* device removed, cleaning up */ 2966static void hso_disconnect(struct usb_interface *interface) 2967{ 2968 hso_free_interface(interface); 2969 2970 /* remove reference of our private data */ 2971 usb_set_intfdata(interface, NULL); 2972} 2973 2974static void async_get_intf(struct work_struct *data) 2975{ 2976 struct hso_device *hso_dev = 2977 container_of(data, struct hso_device, async_get_intf); 2978 usb_autopm_get_interface(hso_dev->interface); 2979} 2980 2981static void async_put_intf(struct work_struct *data) 2982{ 2983 struct hso_device *hso_dev = 2984 container_of(data, struct hso_device, async_put_intf); 2985 usb_autopm_put_interface(hso_dev->interface); 2986} 2987 2988static int hso_get_activity(struct hso_device *hso_dev) 2989{ 2990 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2991 if (!hso_dev->is_active) { 2992 hso_dev->is_active = 1; 2993 schedule_work(&hso_dev->async_get_intf); 2994 } 2995 } 2996 2997 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2998 return -EAGAIN; 2999 3000 usb_mark_last_busy(hso_dev->usb); 3001 3002 return 0; 3003} 3004 3005static int hso_put_activity(struct hso_device *hso_dev) 3006{ 3007 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3008 if (hso_dev->is_active) { 3009 hso_dev->is_active = 0; 3010 schedule_work(&hso_dev->async_put_intf); 3011 return -EAGAIN; 3012 } 3013 } 3014 hso_dev->is_active = 0; 3015 return 0; 3016} 3017 3018/* called by kernel when we need to suspend device */ 3019static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3020{ 3021 int i, result; 3022 3023 /* Stop all serial ports */ 3024 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3025 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3026 result = hso_stop_serial_device(serial_table[i]); 3027 if (result) 3028 goto out; 3029 } 3030 } 3031 3032 /* Stop all network ports */ 3033 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3034 if (network_table[i] && 3035 (network_table[i]->interface == iface)) { 3036 result = hso_stop_net_device(network_table[i]); 3037 if (result) 3038 goto out; 3039 } 3040 } 3041 3042out: 3043 return 0; 3044} 3045 3046/* called by kernel when we need to resume device */ 3047static int hso_resume(struct usb_interface *iface) 3048{ 3049 int i, result = 0; 3050 struct hso_net *hso_net; 3051 3052 /* Start all serial ports */ 3053 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3054 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3055 if (dev2ser(serial_table[i])->port.count) { 3056 result = 3057 hso_start_serial_device(serial_table[i], GFP_NOIO); 3058 hso_kick_transmit(dev2ser(serial_table[i])); 3059 if (result) 3060 goto out; 3061 } 3062 } 3063 } 3064 3065 /* Start all network ports */ 3066 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3067 if (network_table[i] && 3068 (network_table[i]->interface == iface)) { 3069 hso_net = dev2net(network_table[i]); 3070 if (hso_net->flags & IFF_UP) { 3071 /* First transmit any lingering data, 3072 then restart the device. */ 3073 if (hso_net->skb_tx_buf) { 3074 dev_dbg(&iface->dev, 3075 "Transmitting" 3076 " lingering data\n"); 3077 hso_net_start_xmit(hso_net->skb_tx_buf, 3078 hso_net->net); 3079 hso_net->skb_tx_buf = NULL; 3080 } 3081 result = hso_start_net_device(network_table[i]); 3082 if (result) 3083 goto out; 3084 } 3085 } 3086 } 3087 3088out: 3089 return result; 3090} 3091 3092static void hso_serial_ref_free(struct kref *ref) 3093{ 3094 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3095 3096 hso_free_serial_device(hso_dev); 3097} 3098 3099static void hso_free_interface(struct usb_interface *interface) 3100{ 3101 struct hso_serial *serial; 3102 int i; 3103 3104 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3105 if (serial_table[i] && 3106 (serial_table[i]->interface == interface)) { 3107 serial = dev2ser(serial_table[i]); 3108 tty_port_tty_hangup(&serial->port, false); 3109 mutex_lock(&serial->parent->mutex); 3110 serial->parent->usb_gone = 1; 3111 mutex_unlock(&serial->parent->mutex); 3112 cancel_work_sync(&serial_table[i]->async_put_intf); 3113 cancel_work_sync(&serial_table[i]->async_get_intf); 3114 hso_serial_tty_unregister(serial); 3115 kref_put(&serial->parent->ref, hso_serial_ref_free); 3116 } 3117 } 3118 3119 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3120 if (network_table[i] && 3121 (network_table[i]->interface == interface)) { 3122 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3123 /* hso_stop_net_device doesn't stop the net queue since 3124 * traffic needs to start it again when suspended */ 3125 netif_stop_queue(dev2net(network_table[i])->net); 3126 hso_stop_net_device(network_table[i]); 3127 cancel_work_sync(&network_table[i]->async_put_intf); 3128 cancel_work_sync(&network_table[i]->async_get_intf); 3129 if (rfk) { 3130 rfkill_unregister(rfk); 3131 rfkill_destroy(rfk); 3132 } 3133 hso_free_net_device(network_table[i]); 3134 } 3135 } 3136} 3137 3138/* Helper functions */ 3139 3140/* Get the endpoint ! */ 3141static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3142 int type, int dir) 3143{ 3144 int i; 3145 struct usb_host_interface *iface = intf->cur_altsetting; 3146 struct usb_endpoint_descriptor *endp; 3147 3148 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3149 endp = &iface->endpoint[i].desc; 3150 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3151 (usb_endpoint_type(endp) == type)) 3152 return endp; 3153 } 3154 3155 return NULL; 3156} 3157 3158/* Get the byte that describes which ports are enabled */ 3159static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3160{ 3161 int i; 3162 struct usb_host_interface *iface = intf->cur_altsetting; 3163 3164 if (iface->extralen == 3) { 3165 *ports = iface->extra[2]; 3166 return 0; 3167 } 3168 3169 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3170 if (iface->endpoint[i].extralen == 3) { 3171 *ports = iface->endpoint[i].extra[2]; 3172 return 0; 3173 } 3174 } 3175 3176 return -1; 3177} 3178 3179/* interrupt urb needs to be submitted, used for serial read of muxed port */ 3180static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3181 struct usb_device *usb, gfp_t gfp) 3182{ 3183 int result; 3184 3185 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3186 usb_rcvintpipe(usb, 3187 shared_int->intr_endp->bEndpointAddress & 0x7F), 3188 shared_int->shared_intr_buf, 3189 1, 3190 intr_callback, shared_int, 3191 shared_int->intr_endp->bInterval); 3192 3193 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3194 if (result) 3195 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3196 result); 3197 3198 return result; 3199} 3200 3201/* operations setup of the serial interface */ 3202static const struct tty_operations hso_serial_ops = { 3203 .open = hso_serial_open, 3204 .close = hso_serial_close, 3205 .write = hso_serial_write, 3206 .write_room = hso_serial_write_room, 3207 .cleanup = hso_serial_cleanup, 3208 .ioctl = hso_serial_ioctl, 3209 .set_termios = hso_serial_set_termios, 3210 .chars_in_buffer = hso_serial_chars_in_buffer, 3211 .tiocmget = hso_serial_tiocmget, 3212 .tiocmset = hso_serial_tiocmset, 3213 .get_icount = hso_get_count, 3214 .unthrottle = hso_unthrottle 3215}; 3216 3217static struct usb_driver hso_driver = { 3218 .name = driver_name, 3219 .probe = hso_probe, 3220 .disconnect = hso_disconnect, 3221 .id_table = hso_ids, 3222 .suspend = hso_suspend, 3223 .resume = hso_resume, 3224 .reset_resume = hso_resume, 3225 .supports_autosuspend = 1, 3226 .disable_hub_initiated_lpm = 1, 3227}; 3228 3229static int __init hso_init(void) 3230{ 3231 int i; 3232 int result; 3233 3234 /* put it in the log */ 3235 pr_info("%s\n", version); 3236 3237 /* Initialise the serial table semaphore and table */ 3238 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3239 serial_table[i] = NULL; 3240 3241 /* allocate our driver using the proper amount of supported minors */ 3242 tty_drv = tty_alloc_driver(HSO_SERIAL_TTY_MINORS, TTY_DRIVER_REAL_RAW | 3243 TTY_DRIVER_DYNAMIC_DEV); 3244 if (IS_ERR(tty_drv)) 3245 return PTR_ERR(tty_drv); 3246 3247 /* fill in all needed values */ 3248 tty_drv->driver_name = driver_name; 3249 tty_drv->name = tty_filename; 3250 3251 /* if major number is provided as parameter, use that one */ 3252 if (tty_major) 3253 tty_drv->major = tty_major; 3254 3255 tty_drv->minor_start = 0; 3256 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3257 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3258 tty_drv->init_termios = tty_std_termios; 3259 hso_init_termios(&tty_drv->init_termios); 3260 tty_set_operations(tty_drv, &hso_serial_ops); 3261 3262 /* register the tty driver */ 3263 result = tty_register_driver(tty_drv); 3264 if (result) { 3265 pr_err("%s - tty_register_driver failed(%d)\n", 3266 __func__, result); 3267 goto err_free_tty; 3268 } 3269 3270 /* register this module as an usb driver */ 3271 result = usb_register(&hso_driver); 3272 if (result) { 3273 pr_err("Could not register hso driver - error: %d\n", result); 3274 goto err_unreg_tty; 3275 } 3276 3277 /* done */ 3278 return 0; 3279err_unreg_tty: 3280 tty_unregister_driver(tty_drv); 3281err_free_tty: 3282 tty_driver_kref_put(tty_drv); 3283 return result; 3284} 3285 3286static void __exit hso_exit(void) 3287{ 3288 pr_info("unloaded\n"); 3289 3290 tty_unregister_driver(tty_drv); 3291 /* deregister the usb driver */ 3292 usb_deregister(&hso_driver); 3293 tty_driver_kref_put(tty_drv); 3294} 3295 3296/* Module definitions */ 3297module_init(hso_init); 3298module_exit(hso_exit); 3299 3300MODULE_AUTHOR(MOD_AUTHOR); 3301MODULE_DESCRIPTION(MOD_DESCRIPTION); 3302MODULE_LICENSE("GPL"); 3303 3304/* change the debug level (eg: insmod hso.ko debug=0x04) */ 3305MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3306module_param(debug, int, 0644); 3307 3308/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3309MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3310module_param(tty_major, int, 0644); 3311 3312/* disable network interface (eg: insmod hso.ko disable_net=1) */ 3313MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3314module_param(disable_net, int, 0644); 3315