1/****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31/****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53#include <linux/sched.h> 54#include <linux/slab.h> 55#include <linux/init.h> 56#include <linux/delay.h> 57#include <linux/netdevice.h> 58#include <linux/module.h> 59#include <linux/ethtool.h> 60#include <linux/usb.h> 61#include <linux/timer.h> 62#include <linux/tty.h> 63#include <linux/tty_driver.h> 64#include <linux/tty_flip.h> 65#include <linux/kmod.h> 66#include <linux/rfkill.h> 67#include <linux/ip.h> 68#include <linux/uaccess.h> 69#include <linux/usb/cdc.h> 70#include <net/arp.h> 71#include <asm/byteorder.h> 72#include <linux/serial_core.h> 73#include <linux/serial.h> 74 75 76#define MOD_AUTHOR "Option Wireless" 77#define MOD_DESCRIPTION "USB High Speed Option driver" 78#define MOD_LICENSE "GPL" 79 80#define HSO_MAX_NET_DEVICES 10 81#define HSO__MAX_MTU 2048 82#define DEFAULT_MTU 1500 83#define DEFAULT_MRU 1500 84 85#define CTRL_URB_RX_SIZE 1024 86#define CTRL_URB_TX_SIZE 64 87 88#define BULK_URB_RX_SIZE 4096 89#define BULK_URB_TX_SIZE 8192 90 91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93#define MUX_BULK_RX_BUF_COUNT 4 94#define USB_TYPE_OPTION_VENDOR 0x20 95 96/* These definitions are used with the struct hso_net flags element */ 97/* - use *_bit operations on it. (bit indices not values.) */ 98#define HSO_NET_RUNNING 0 99 100#define HSO_NET_TX_TIMEOUT (HZ*10) 101 102#define HSO_SERIAL_MAGIC 0x48534f31 103 104/* Number of ttys to handle */ 105#define HSO_SERIAL_TTY_MINORS 256 106 107#define MAX_RX_URBS 2 108 109static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 110{ 111 if (tty) 112 return tty->driver_data; 113 return NULL; 114} 115 116/*****************************************************************************/ 117/* Debugging functions */ 118/*****************************************************************************/ 119#define D__(lvl_, fmt, arg...) \ 120 do { \ 121 printk(lvl_ "[%d:%s]: " fmt "\n", \ 122 __LINE__, __func__, ## arg); \ 123 } while (0) 124 125#define D_(lvl, args...) \ 126 do { \ 127 if (lvl & debug) \ 128 D__(KERN_INFO, args); \ 129 } while (0) 130 131#define D1(args...) D_(0x01, ##args) 132#define D2(args...) D_(0x02, ##args) 133#define D3(args...) D_(0x04, ##args) 134#define D4(args...) D_(0x08, ##args) 135#define D5(args...) D_(0x10, ##args) 136 137/*****************************************************************************/ 138/* Enumerators */ 139/*****************************************************************************/ 140enum pkt_parse_state { 141 WAIT_IP, 142 WAIT_DATA, 143 WAIT_SYNC 144}; 145 146/*****************************************************************************/ 147/* Structs */ 148/*****************************************************************************/ 149 150struct hso_shared_int { 151 struct usb_endpoint_descriptor *intr_endp; 152 void *shared_intr_buf; 153 struct urb *shared_intr_urb; 154 struct usb_device *usb; 155 int use_count; 156 int ref_count; 157 struct mutex shared_int_lock; 158}; 159 160struct hso_net { 161 struct hso_device *parent; 162 struct net_device *net; 163 struct rfkill *rfkill; 164 165 struct usb_endpoint_descriptor *in_endp; 166 struct usb_endpoint_descriptor *out_endp; 167 168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 169 struct urb *mux_bulk_tx_urb; 170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 171 void *mux_bulk_tx_buf; 172 173 struct sk_buff *skb_rx_buf; 174 struct sk_buff *skb_tx_buf; 175 176 enum pkt_parse_state rx_parse_state; 177 spinlock_t net_lock; 178 179 unsigned short rx_buf_size; 180 unsigned short rx_buf_missing; 181 struct iphdr rx_ip_hdr; 182 183 unsigned long flags; 184}; 185 186enum rx_ctrl_state{ 187 RX_IDLE, 188 RX_SENT, 189 RX_PENDING 190}; 191 192#define BM_REQUEST_TYPE (0xa1) 193#define B_NOTIFICATION (0x20) 194#define W_VALUE (0x0) 195#define W_INDEX (0x2) 196#define W_LENGTH (0x2) 197 198#define B_OVERRUN (0x1<<6) 199#define B_PARITY (0x1<<5) 200#define B_FRAMING (0x1<<4) 201#define B_RING_SIGNAL (0x1<<3) 202#define B_BREAK (0x1<<2) 203#define B_TX_CARRIER (0x1<<1) 204#define B_RX_CARRIER (0x1<<0) 205 206struct hso_serial_state_notification { 207 u8 bmRequestType; 208 u8 bNotification; 209 u16 wValue; 210 u16 wIndex; 211 u16 wLength; 212 u16 UART_state_bitmap; 213} __packed; 214 215struct hso_tiocmget { 216 struct mutex mutex; 217 wait_queue_head_t waitq; 218 int intr_completed; 219 struct usb_endpoint_descriptor *endp; 220 struct urb *urb; 221 struct hso_serial_state_notification serial_state_notification; 222 u16 prev_UART_state_bitmap; 223 struct uart_icount icount; 224}; 225 226 227struct hso_serial { 228 struct hso_device *parent; 229 int magic; 230 u8 minor; 231 232 struct hso_shared_int *shared_int; 233 234 /* rx/tx urb could be either a bulk urb or a control urb depending 235 on which serial port it is used on. */ 236 struct urb *rx_urb[MAX_RX_URBS]; 237 u8 num_rx_urbs; 238 u8 *rx_data[MAX_RX_URBS]; 239 u16 rx_data_length; /* should contain allocated length */ 240 241 struct urb *tx_urb; 242 u8 *tx_data; 243 u8 *tx_buffer; 244 u16 tx_data_length; /* should contain allocated length */ 245 u16 tx_data_count; 246 u16 tx_buffer_count; 247 struct usb_ctrlrequest ctrl_req_tx; 248 struct usb_ctrlrequest ctrl_req_rx; 249 250 struct usb_endpoint_descriptor *in_endp; 251 struct usb_endpoint_descriptor *out_endp; 252 253 enum rx_ctrl_state rx_state; 254 u8 rts_state; 255 u8 dtr_state; 256 unsigned tx_urb_used:1; 257 258 /* from usb_serial_port */ 259 struct tty_struct *tty; 260 int open_count; 261 spinlock_t serial_lock; 262 263 int (*write_data) (struct hso_serial *serial); 264 struct hso_tiocmget *tiocmget; 265 /* Hacks required to get flow control 266 * working on the serial receive buffers 267 * so as not to drop characters on the floor. 268 */ 269 int curr_rx_urb_idx; 270 u16 curr_rx_urb_offset; 271 u8 rx_urb_filled[MAX_RX_URBS]; 272 struct tasklet_struct unthrottle_tasklet; 273 struct work_struct retry_unthrottle_workqueue; 274}; 275 276struct hso_device { 277 union { 278 struct hso_serial *dev_serial; 279 struct hso_net *dev_net; 280 } port_data; 281 282 u32 port_spec; 283 284 u8 is_active; 285 u8 usb_gone; 286 struct work_struct async_get_intf; 287 struct work_struct async_put_intf; 288 struct work_struct reset_device; 289 290 struct usb_device *usb; 291 struct usb_interface *interface; 292 293 struct device *dev; 294 struct kref ref; 295 struct mutex mutex; 296}; 297 298/* Type of interface */ 299#define HSO_INTF_MASK 0xFF00 300#define HSO_INTF_MUX 0x0100 301#define HSO_INTF_BULK 0x0200 302 303/* Type of port */ 304#define HSO_PORT_MASK 0xFF 305#define HSO_PORT_NO_PORT 0x0 306#define HSO_PORT_CONTROL 0x1 307#define HSO_PORT_APP 0x2 308#define HSO_PORT_GPS 0x3 309#define HSO_PORT_PCSC 0x4 310#define HSO_PORT_APP2 0x5 311#define HSO_PORT_GPS_CONTROL 0x6 312#define HSO_PORT_MSD 0x7 313#define HSO_PORT_VOICE 0x8 314#define HSO_PORT_DIAG2 0x9 315#define HSO_PORT_DIAG 0x10 316#define HSO_PORT_MODEM 0x11 317#define HSO_PORT_NETWORK 0x12 318 319/* Additional device info */ 320#define HSO_INFO_MASK 0xFF000000 321#define HSO_INFO_CRC_BUG 0x01000000 322 323/*****************************************************************************/ 324/* Prototypes */ 325/*****************************************************************************/ 326/* Serial driver functions */ 327static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 328 unsigned int set, unsigned int clear); 329static void ctrl_callback(struct urb *urb); 330static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 331static void hso_kick_transmit(struct hso_serial *serial); 332/* Helper functions */ 333static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 334 struct usb_device *usb, gfp_t gfp); 335static void handle_usb_error(int status, const char *function, 336 struct hso_device *hso_dev); 337static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 338 int type, int dir); 339static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 340static void hso_free_interface(struct usb_interface *intf); 341static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 342static int hso_stop_serial_device(struct hso_device *hso_dev); 343static int hso_start_net_device(struct hso_device *hso_dev); 344static void hso_free_shared_int(struct hso_shared_int *shared_int); 345static int hso_stop_net_device(struct hso_device *hso_dev); 346static void hso_serial_ref_free(struct kref *ref); 347static void hso_std_serial_read_bulk_callback(struct urb *urb); 348static int hso_mux_serial_read(struct hso_serial *serial); 349static void async_get_intf(struct work_struct *data); 350static void async_put_intf(struct work_struct *data); 351static int hso_put_activity(struct hso_device *hso_dev); 352static int hso_get_activity(struct hso_device *hso_dev); 353static void tiocmget_intr_callback(struct urb *urb); 354static void reset_device(struct work_struct *data); 355/*****************************************************************************/ 356/* Helping functions */ 357/*****************************************************************************/ 358 359/* #define DEBUG */ 360 361static inline struct hso_net *dev2net(struct hso_device *hso_dev) 362{ 363 return hso_dev->port_data.dev_net; 364} 365 366static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 367{ 368 return hso_dev->port_data.dev_serial; 369} 370 371/* Debugging functions */ 372#ifdef DEBUG 373static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 374 unsigned int len) 375{ 376 static char name[255]; 377 378 sprintf(name, "hso[%d:%s]", line_count, func_name); 379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 380} 381 382#define DUMP(buf_, len_) \ 383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 384 385#define DUMP1(buf_, len_) \ 386 do { \ 387 if (0x01 & debug) \ 388 DUMP(buf_, len_); \ 389 } while (0) 390#else 391#define DUMP(buf_, len_) 392#define DUMP1(buf_, len_) 393#endif 394 395/* module parameters */ 396static int debug; 397static int tty_major; 398static int disable_net; 399 400/* driver info */ 401static const char driver_name[] = "hso"; 402static const char tty_filename[] = "ttyHS"; 403static const char *version = __FILE__ ": " MOD_AUTHOR; 404/* the usb driver itself (registered in hso_init) */ 405static struct usb_driver hso_driver; 406/* serial structures */ 407static struct tty_driver *tty_drv; 408static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 409static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 410static spinlock_t serial_table_lock; 411 412static const s32 default_port_spec[] = { 413 HSO_INTF_MUX | HSO_PORT_NETWORK, 414 HSO_INTF_BULK | HSO_PORT_DIAG, 415 HSO_INTF_BULK | HSO_PORT_MODEM, 416 0 417}; 418 419static const s32 icon321_port_spec[] = { 420 HSO_INTF_MUX | HSO_PORT_NETWORK, 421 HSO_INTF_BULK | HSO_PORT_DIAG2, 422 HSO_INTF_BULK | HSO_PORT_MODEM, 423 HSO_INTF_BULK | HSO_PORT_DIAG, 424 0 425}; 426 427#define default_port_device(vendor, product) \ 428 USB_DEVICE(vendor, product), \ 429 .driver_info = (kernel_ulong_t)default_port_spec 430 431#define icon321_port_device(vendor, product) \ 432 USB_DEVICE(vendor, product), \ 433 .driver_info = (kernel_ulong_t)icon321_port_spec 434 435/* list of devices we support */ 436static const struct usb_device_id hso_ids[] = { 437 {default_port_device(0x0af0, 0x6711)}, 438 {default_port_device(0x0af0, 0x6731)}, 439 {default_port_device(0x0af0, 0x6751)}, 440 {default_port_device(0x0af0, 0x6771)}, 441 {default_port_device(0x0af0, 0x6791)}, 442 {default_port_device(0x0af0, 0x6811)}, 443 {default_port_device(0x0af0, 0x6911)}, 444 {default_port_device(0x0af0, 0x6951)}, 445 {default_port_device(0x0af0, 0x6971)}, 446 {default_port_device(0x0af0, 0x7011)}, 447 {default_port_device(0x0af0, 0x7031)}, 448 {default_port_device(0x0af0, 0x7051)}, 449 {default_port_device(0x0af0, 0x7071)}, 450 {default_port_device(0x0af0, 0x7111)}, 451 {default_port_device(0x0af0, 0x7211)}, 452 {default_port_device(0x0af0, 0x7251)}, 453 {default_port_device(0x0af0, 0x7271)}, 454 {default_port_device(0x0af0, 0x7311)}, 455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 465 {USB_DEVICE(0x0af0, 0x7701)}, 466 {USB_DEVICE(0x0af0, 0x7706)}, 467 {USB_DEVICE(0x0af0, 0x7801)}, 468 {USB_DEVICE(0x0af0, 0x7901)}, 469 {USB_DEVICE(0x0af0, 0x7A01)}, 470 {USB_DEVICE(0x0af0, 0x7A05)}, 471 {USB_DEVICE(0x0af0, 0x8200)}, 472 {USB_DEVICE(0x0af0, 0x8201)}, 473 {USB_DEVICE(0x0af0, 0x8300)}, 474 {USB_DEVICE(0x0af0, 0x8302)}, 475 {USB_DEVICE(0x0af0, 0x8304)}, 476 {USB_DEVICE(0x0af0, 0x8400)}, 477 {USB_DEVICE(0x0af0, 0x8600)}, 478 {USB_DEVICE(0x0af0, 0x8800)}, 479 {USB_DEVICE(0x0af0, 0x8900)}, 480 {USB_DEVICE(0x0af0, 0x9000)}, 481 {USB_DEVICE(0x0af0, 0xd035)}, 482 {USB_DEVICE(0x0af0, 0xd055)}, 483 {USB_DEVICE(0x0af0, 0xd155)}, 484 {USB_DEVICE(0x0af0, 0xd255)}, 485 {USB_DEVICE(0x0af0, 0xd057)}, 486 {USB_DEVICE(0x0af0, 0xd157)}, 487 {USB_DEVICE(0x0af0, 0xd257)}, 488 {USB_DEVICE(0x0af0, 0xd357)}, 489 {USB_DEVICE(0x0af0, 0xd058)}, 490 {USB_DEVICE(0x0af0, 0xc100)}, 491 {} 492}; 493MODULE_DEVICE_TABLE(usb, hso_ids); 494 495/* Sysfs attribute */ 496static ssize_t hso_sysfs_show_porttype(struct device *dev, 497 struct device_attribute *attr, 498 char *buf) 499{ 500 struct hso_device *hso_dev = dev_get_drvdata(dev); 501 char *port_name; 502 503 if (!hso_dev) 504 return 0; 505 506 switch (hso_dev->port_spec & HSO_PORT_MASK) { 507 case HSO_PORT_CONTROL: 508 port_name = "Control"; 509 break; 510 case HSO_PORT_APP: 511 port_name = "Application"; 512 break; 513 case HSO_PORT_APP2: 514 port_name = "Application2"; 515 break; 516 case HSO_PORT_GPS: 517 port_name = "GPS"; 518 break; 519 case HSO_PORT_GPS_CONTROL: 520 port_name = "GPS Control"; 521 break; 522 case HSO_PORT_PCSC: 523 port_name = "PCSC"; 524 break; 525 case HSO_PORT_DIAG: 526 port_name = "Diagnostic"; 527 break; 528 case HSO_PORT_DIAG2: 529 port_name = "Diagnostic2"; 530 break; 531 case HSO_PORT_MODEM: 532 port_name = "Modem"; 533 break; 534 case HSO_PORT_NETWORK: 535 port_name = "Network"; 536 break; 537 default: 538 port_name = "Unknown"; 539 break; 540 } 541 542 return sprintf(buf, "%s\n", port_name); 543} 544static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 545 546static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 547{ 548 int idx; 549 550 for (idx = 0; idx < serial->num_rx_urbs; idx++) 551 if (serial->rx_urb[idx] == urb) 552 return idx; 553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 554 return -1; 555} 556 557/* converts mux value to a port spec value */ 558static u32 hso_mux_to_port(int mux) 559{ 560 u32 result; 561 562 switch (mux) { 563 case 0x1: 564 result = HSO_PORT_CONTROL; 565 break; 566 case 0x2: 567 result = HSO_PORT_APP; 568 break; 569 case 0x4: 570 result = HSO_PORT_PCSC; 571 break; 572 case 0x8: 573 result = HSO_PORT_GPS; 574 break; 575 case 0x10: 576 result = HSO_PORT_APP2; 577 break; 578 default: 579 result = HSO_PORT_NO_PORT; 580 } 581 return result; 582} 583 584/* converts port spec value to a mux value */ 585static u32 hso_port_to_mux(int port) 586{ 587 u32 result; 588 589 switch (port & HSO_PORT_MASK) { 590 case HSO_PORT_CONTROL: 591 result = 0x0; 592 break; 593 case HSO_PORT_APP: 594 result = 0x1; 595 break; 596 case HSO_PORT_PCSC: 597 result = 0x2; 598 break; 599 case HSO_PORT_GPS: 600 result = 0x3; 601 break; 602 case HSO_PORT_APP2: 603 result = 0x4; 604 break; 605 default: 606 result = 0x0; 607 } 608 return result; 609} 610 611static struct hso_serial *get_serial_by_shared_int_and_type( 612 struct hso_shared_int *shared_int, 613 int mux) 614{ 615 int i, port; 616 617 port = hso_mux_to_port(mux); 618 619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 620 if (serial_table[i] && 621 (dev2ser(serial_table[i])->shared_int == shared_int) && 622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 623 return dev2ser(serial_table[i]); 624 } 625 } 626 627 return NULL; 628} 629 630static struct hso_serial *get_serial_by_index(unsigned index) 631{ 632 struct hso_serial *serial = NULL; 633 unsigned long flags; 634 635 spin_lock_irqsave(&serial_table_lock, flags); 636 if (serial_table[index]) 637 serial = dev2ser(serial_table[index]); 638 spin_unlock_irqrestore(&serial_table_lock, flags); 639 640 return serial; 641} 642 643static int get_free_serial_index(void) 644{ 645 int index; 646 unsigned long flags; 647 648 spin_lock_irqsave(&serial_table_lock, flags); 649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 650 if (serial_table[index] == NULL) { 651 spin_unlock_irqrestore(&serial_table_lock, flags); 652 return index; 653 } 654 } 655 spin_unlock_irqrestore(&serial_table_lock, flags); 656 657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 658 return -1; 659} 660 661static void set_serial_by_index(unsigned index, struct hso_serial *serial) 662{ 663 unsigned long flags; 664 665 spin_lock_irqsave(&serial_table_lock, flags); 666 if (serial) 667 serial_table[index] = serial->parent; 668 else 669 serial_table[index] = NULL; 670 spin_unlock_irqrestore(&serial_table_lock, flags); 671} 672 673static void handle_usb_error(int status, const char *function, 674 struct hso_device *hso_dev) 675{ 676 char *explanation; 677 678 switch (status) { 679 case -ENODEV: 680 explanation = "no device"; 681 break; 682 case -ENOENT: 683 explanation = "endpoint not enabled"; 684 break; 685 case -EPIPE: 686 explanation = "endpoint stalled"; 687 break; 688 case -ENOSPC: 689 explanation = "not enough bandwidth"; 690 break; 691 case -ESHUTDOWN: 692 explanation = "device disabled"; 693 break; 694 case -EHOSTUNREACH: 695 explanation = "device suspended"; 696 break; 697 case -EINVAL: 698 case -EAGAIN: 699 case -EFBIG: 700 case -EMSGSIZE: 701 explanation = "internal error"; 702 break; 703 case -EILSEQ: 704 case -EPROTO: 705 case -ETIME: 706 case -ETIMEDOUT: 707 explanation = "protocol error"; 708 if (hso_dev) 709 schedule_work(&hso_dev->reset_device); 710 break; 711 default: 712 explanation = "unknown status"; 713 break; 714 } 715 716 /* log a meaningful explanation of an USB status */ 717 D1("%s: received USB status - %s (%d)", function, explanation, status); 718} 719 720/* Network interface functions */ 721 722/* called when net interface is brought up by ifconfig */ 723static int hso_net_open(struct net_device *net) 724{ 725 struct hso_net *odev = netdev_priv(net); 726 unsigned long flags = 0; 727 728 if (!odev) { 729 dev_err(&net->dev, "No net device !\n"); 730 return -ENODEV; 731 } 732 733 odev->skb_tx_buf = NULL; 734 735 /* setup environment */ 736 spin_lock_irqsave(&odev->net_lock, flags); 737 odev->rx_parse_state = WAIT_IP; 738 odev->rx_buf_size = 0; 739 odev->rx_buf_missing = sizeof(struct iphdr); 740 spin_unlock_irqrestore(&odev->net_lock, flags); 741 742 /* We are up and running. */ 743 set_bit(HSO_NET_RUNNING, &odev->flags); 744 hso_start_net_device(odev->parent); 745 746 /* Tell the kernel we are ready to start receiving from it */ 747 netif_start_queue(net); 748 749 return 0; 750} 751 752/* called when interface is brought down by ifconfig */ 753static int hso_net_close(struct net_device *net) 754{ 755 struct hso_net *odev = netdev_priv(net); 756 757 /* we don't need the queue anymore */ 758 netif_stop_queue(net); 759 /* no longer running */ 760 clear_bit(HSO_NET_RUNNING, &odev->flags); 761 762 hso_stop_net_device(odev->parent); 763 764 /* done */ 765 return 0; 766} 767 768/* USB tells is xmit done, we should start the netqueue again */ 769static void write_bulk_callback(struct urb *urb) 770{ 771 struct hso_net *odev = urb->context; 772 int status = urb->status; 773 774 /* Sanity check */ 775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 777 return; 778 } 779 780 /* Do we still have a valid kernel network device? */ 781 if (!netif_device_present(odev->net)) { 782 dev_err(&urb->dev->dev, "%s: net device not present\n", 783 __func__); 784 return; 785 } 786 787 /* log status, but don't act on it, we don't need to resubmit anything 788 * anyhow */ 789 if (status) 790 handle_usb_error(status, __func__, odev->parent); 791 792 hso_put_activity(odev->parent); 793 794 /* Tell the network interface we are ready for another frame */ 795 netif_wake_queue(odev->net); 796} 797 798/* called by kernel when we need to transmit a packet */ 799static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 800 struct net_device *net) 801{ 802 struct hso_net *odev = netdev_priv(net); 803 int result; 804 805 /* Tell the kernel, "No more frames 'til we are done with this one." */ 806 netif_stop_queue(net); 807 if (hso_get_activity(odev->parent) == -EAGAIN) { 808 odev->skb_tx_buf = skb; 809 return NETDEV_TX_OK; 810 } 811 812 /* log if asked */ 813 DUMP1(skb->data, skb->len); 814 /* Copy it from kernel memory to OUR memory */ 815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 817 818 /* Fill in the URB for shipping it out. */ 819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 820 odev->parent->usb, 821 usb_sndbulkpipe(odev->parent->usb, 822 odev->out_endp-> 823 bEndpointAddress & 0x7F), 824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 825 odev); 826 827 /* Deal with the Zero Length packet problem, I hope */ 828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 829 830 /* Send the URB on its merry way. */ 831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 832 if (result) { 833 dev_warn(&odev->parent->interface->dev, 834 "failed mux_bulk_tx_urb %d\n", result); 835 net->stats.tx_errors++; 836 netif_start_queue(net); 837 } else { 838 net->stats.tx_packets++; 839 net->stats.tx_bytes += skb->len; 840 } 841 dev_kfree_skb(skb); 842 /* we're done */ 843 return NETDEV_TX_OK; 844} 845 846static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 847{ 848 struct hso_net *odev = netdev_priv(net); 849 850 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 851 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 852} 853 854static const struct ethtool_ops ops = { 855 .get_drvinfo = hso_get_drvinfo, 856 .get_link = ethtool_op_get_link 857}; 858 859/* called when a packet did not ack after watchdogtimeout */ 860static void hso_net_tx_timeout(struct net_device *net) 861{ 862 struct hso_net *odev = netdev_priv(net); 863 864 if (!odev) 865 return; 866 867 /* Tell syslog we are hosed. */ 868 dev_warn(&net->dev, "Tx timed out.\n"); 869 870 /* Tear the waiting frame off the list */ 871 if (odev->mux_bulk_tx_urb && 872 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 873 usb_unlink_urb(odev->mux_bulk_tx_urb); 874 875 /* Update statistics */ 876 net->stats.tx_errors++; 877} 878 879/* make a real packet from the received USB buffer */ 880static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 881 unsigned int count, unsigned char is_eop) 882{ 883 unsigned short temp_bytes; 884 unsigned short buffer_offset = 0; 885 unsigned short frame_len; 886 unsigned char *tmp_rx_buf; 887 888 /* log if needed */ 889 D1("Rx %d bytes", count); 890 DUMP(ip_pkt, min(128, (int)count)); 891 892 while (count) { 893 switch (odev->rx_parse_state) { 894 case WAIT_IP: 895 /* waiting for IP header. */ 896 /* wanted bytes - size of ip header */ 897 temp_bytes = 898 (count < 899 odev->rx_buf_missing) ? count : odev-> 900 rx_buf_missing; 901 902 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 903 odev->rx_buf_size, ip_pkt + buffer_offset, 904 temp_bytes); 905 906 odev->rx_buf_size += temp_bytes; 907 buffer_offset += temp_bytes; 908 odev->rx_buf_missing -= temp_bytes; 909 count -= temp_bytes; 910 911 if (!odev->rx_buf_missing) { 912 /* header is complete allocate an sk_buffer and 913 * continue to WAIT_DATA */ 914 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 915 916 if ((frame_len > DEFAULT_MRU) || 917 (frame_len < sizeof(struct iphdr))) { 918 dev_err(&odev->net->dev, 919 "Invalid frame (%d) length\n", 920 frame_len); 921 odev->rx_parse_state = WAIT_SYNC; 922 continue; 923 } 924 /* Allocate an sk_buff */ 925 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 926 frame_len); 927 if (!odev->skb_rx_buf) { 928 /* We got no receive buffer. */ 929 D1("could not allocate memory"); 930 odev->rx_parse_state = WAIT_SYNC; 931 return; 932 } 933 934 /* Copy what we got so far. make room for iphdr 935 * after tail. */ 936 tmp_rx_buf = 937 skb_put(odev->skb_rx_buf, 938 sizeof(struct iphdr)); 939 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 940 sizeof(struct iphdr)); 941 942 /* ETH_HLEN */ 943 odev->rx_buf_size = sizeof(struct iphdr); 944 945 /* Filip actually use .tot_len */ 946 odev->rx_buf_missing = 947 frame_len - sizeof(struct iphdr); 948 odev->rx_parse_state = WAIT_DATA; 949 } 950 break; 951 952 case WAIT_DATA: 953 temp_bytes = (count < odev->rx_buf_missing) 954 ? count : odev->rx_buf_missing; 955 956 /* Copy the rest of the bytes that are left in the 957 * buffer into the waiting sk_buf. */ 958 /* Make room for temp_bytes after tail. */ 959 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 960 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 961 962 odev->rx_buf_missing -= temp_bytes; 963 count -= temp_bytes; 964 buffer_offset += temp_bytes; 965 odev->rx_buf_size += temp_bytes; 966 if (!odev->rx_buf_missing) { 967 /* Packet is complete. Inject into stack. */ 968 /* We have IP packet here */ 969 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 970 /* don't check it */ 971 odev->skb_rx_buf->ip_summed = 972 CHECKSUM_UNNECESSARY; 973 974 skb_reset_mac_header(odev->skb_rx_buf); 975 976 /* Ship it off to the kernel */ 977 netif_rx(odev->skb_rx_buf); 978 /* No longer our buffer. */ 979 odev->skb_rx_buf = NULL; 980 981 /* update out statistics */ 982 odev->net->stats.rx_packets++; 983 984 odev->net->stats.rx_bytes += odev->rx_buf_size; 985 986 odev->rx_buf_size = 0; 987 odev->rx_buf_missing = sizeof(struct iphdr); 988 odev->rx_parse_state = WAIT_IP; 989 } 990 break; 991 992 case WAIT_SYNC: 993 D1(" W_S"); 994 count = 0; 995 break; 996 default: 997 D1(" "); 998 count--; 999 break; 1000 } 1001 } 1002 1003 /* Recovery mechanism for WAIT_SYNC state. */ 1004 if (is_eop) { 1005 if (odev->rx_parse_state == WAIT_SYNC) { 1006 odev->rx_parse_state = WAIT_IP; 1007 odev->rx_buf_size = 0; 1008 odev->rx_buf_missing = sizeof(struct iphdr); 1009 } 1010 } 1011} 1012 1013/* Moving data from usb to kernel (in interrupt state) */ 1014static void read_bulk_callback(struct urb *urb) 1015{ 1016 struct hso_net *odev = urb->context; 1017 struct net_device *net; 1018 int result; 1019 int status = urb->status; 1020 1021 /* is al ok? (Filip: Who's Al ?) */ 1022 if (status) { 1023 handle_usb_error(status, __func__, odev->parent); 1024 return; 1025 } 1026 1027 /* Sanity check */ 1028 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1029 D1("BULK IN callback but driver is not active!"); 1030 return; 1031 } 1032 usb_mark_last_busy(urb->dev); 1033 1034 net = odev->net; 1035 1036 if (!netif_device_present(net)) { 1037 /* Somebody killed our network interface... */ 1038 return; 1039 } 1040 1041 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 1042 u32 rest; 1043 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1044 rest = urb->actual_length % 1045 le16_to_cpu(odev->in_endp->wMaxPacketSize); 1046 if (((rest == 5) || (rest == 6)) && 1047 !memcmp(((u8 *) urb->transfer_buffer) + 1048 urb->actual_length - 4, crc_check, 4)) { 1049 urb->actual_length -= 4; 1050 } 1051 } 1052 1053 /* do we even have a packet? */ 1054 if (urb->actual_length) { 1055 /* Handle the IP stream, add header and push it onto network 1056 * stack if the packet is complete. */ 1057 spin_lock(&odev->net_lock); 1058 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1059 (urb->transfer_buffer_length > 1060 urb->actual_length) ? 1 : 0); 1061 spin_unlock(&odev->net_lock); 1062 } 1063 1064 /* We are done with this URB, resubmit it. Prep the USB to wait for 1065 * another frame. Reuse same as received. */ 1066 usb_fill_bulk_urb(urb, 1067 odev->parent->usb, 1068 usb_rcvbulkpipe(odev->parent->usb, 1069 odev->in_endp-> 1070 bEndpointAddress & 0x7F), 1071 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1072 read_bulk_callback, odev); 1073 1074 /* Give this to the USB subsystem so it can tell us when more data 1075 * arrives. */ 1076 result = usb_submit_urb(urb, GFP_ATOMIC); 1077 if (result) 1078 dev_warn(&odev->parent->interface->dev, 1079 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1080 result); 1081} 1082 1083/* Serial driver functions */ 1084 1085static void hso_init_termios(struct ktermios *termios) 1086{ 1087 /* 1088 * The default requirements for this device are: 1089 */ 1090 termios->c_iflag &= 1091 ~(IGNBRK /* disable ignore break */ 1092 | BRKINT /* disable break causes interrupt */ 1093 | PARMRK /* disable mark parity errors */ 1094 | ISTRIP /* disable clear high bit of input characters */ 1095 | INLCR /* disable translate NL to CR */ 1096 | IGNCR /* disable ignore CR */ 1097 | ICRNL /* disable translate CR to NL */ 1098 | IXON); /* disable enable XON/XOFF flow control */ 1099 1100 /* disable postprocess output characters */ 1101 termios->c_oflag &= ~OPOST; 1102 1103 termios->c_lflag &= 1104 ~(ECHO /* disable echo input characters */ 1105 | ECHONL /* disable echo new line */ 1106 | ICANON /* disable erase, kill, werase, and rprnt 1107 special characters */ 1108 | ISIG /* disable interrupt, quit, and suspend special 1109 characters */ 1110 | IEXTEN); /* disable non-POSIX special characters */ 1111 1112 termios->c_cflag &= 1113 ~(CSIZE /* no size */ 1114 | PARENB /* disable parity bit */ 1115 | CBAUD /* clear current baud rate */ 1116 | CBAUDEX); /* clear current buad rate */ 1117 1118 termios->c_cflag |= CS8; /* character size 8 bits */ 1119 1120 /* baud rate 115200 */ 1121 tty_termios_encode_baud_rate(termios, 115200, 115200); 1122} 1123 1124static void _hso_serial_set_termios(struct tty_struct *tty, 1125 struct ktermios *old) 1126{ 1127 struct hso_serial *serial = get_serial_by_tty(tty); 1128 struct ktermios *termios; 1129 1130 if (!serial) { 1131 printk(KERN_ERR "%s: no tty structures", __func__); 1132 return; 1133 } 1134 1135 D4("port %d", serial->minor); 1136 1137 /* 1138 * Fix up unsupported bits 1139 */ 1140 termios = tty->termios; 1141 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1142 1143 termios->c_cflag &= 1144 ~(CSIZE /* no size */ 1145 | PARENB /* disable parity bit */ 1146 | CBAUD /* clear current baud rate */ 1147 | CBAUDEX); /* clear current buad rate */ 1148 1149 termios->c_cflag |= CS8; /* character size 8 bits */ 1150 1151 /* baud rate 115200 */ 1152 tty_encode_baud_rate(tty, 115200, 115200); 1153} 1154 1155static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1156{ 1157 int result; 1158 /* We are done with this URB, resubmit it. Prep the USB to wait for 1159 * another frame */ 1160 usb_fill_bulk_urb(urb, serial->parent->usb, 1161 usb_rcvbulkpipe(serial->parent->usb, 1162 serial->in_endp-> 1163 bEndpointAddress & 0x7F), 1164 urb->transfer_buffer, serial->rx_data_length, 1165 hso_std_serial_read_bulk_callback, serial); 1166 /* Give this to the USB subsystem so it can tell us when more data 1167 * arrives. */ 1168 result = usb_submit_urb(urb, GFP_ATOMIC); 1169 if (result) { 1170 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1171 __func__, result); 1172 } 1173} 1174 1175 1176 1177 1178static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1179{ 1180 int count; 1181 struct urb *curr_urb; 1182 1183 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1184 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1185 count = put_rxbuf_data(curr_urb, serial); 1186 if (count == -1) 1187 return; 1188 if (count == 0) { 1189 serial->curr_rx_urb_idx++; 1190 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1191 serial->curr_rx_urb_idx = 0; 1192 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1193 } 1194 } 1195} 1196 1197static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1198{ 1199 int count = 0; 1200 struct urb *urb; 1201 1202 urb = serial->rx_urb[0]; 1203 if (serial->open_count > 0) { 1204 count = put_rxbuf_data(urb, serial); 1205 if (count == -1) 1206 return; 1207 } 1208 /* Re issue a read as long as we receive data. */ 1209 1210 if (count == 0 && ((urb->actual_length != 0) || 1211 (serial->rx_state == RX_PENDING))) { 1212 serial->rx_state = RX_SENT; 1213 hso_mux_serial_read(serial); 1214 } else 1215 serial->rx_state = RX_IDLE; 1216} 1217 1218 1219/* read callback for Diag and CS port */ 1220static void hso_std_serial_read_bulk_callback(struct urb *urb) 1221{ 1222 struct hso_serial *serial = urb->context; 1223 int status = urb->status; 1224 1225 /* sanity check */ 1226 if (!serial) { 1227 D1("serial == NULL"); 1228 return; 1229 } else if (status) { 1230 handle_usb_error(status, __func__, serial->parent); 1231 return; 1232 } 1233 1234 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1235 D1("Actual length = %d\n", urb->actual_length); 1236 DUMP1(urb->transfer_buffer, urb->actual_length); 1237 1238 /* Anyone listening? */ 1239 if (serial->open_count == 0) 1240 return; 1241 1242 if (status == 0) { 1243 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1244 u32 rest; 1245 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1246 rest = 1247 urb->actual_length % 1248 le16_to_cpu(serial->in_endp->wMaxPacketSize); 1249 if (((rest == 5) || (rest == 6)) && 1250 !memcmp(((u8 *) urb->transfer_buffer) + 1251 urb->actual_length - 4, crc_check, 4)) { 1252 urb->actual_length -= 4; 1253 } 1254 } 1255 /* Valid data, handle RX data */ 1256 spin_lock(&serial->serial_lock); 1257 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1258 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1259 spin_unlock(&serial->serial_lock); 1260 } else if (status == -ENOENT || status == -ECONNRESET) { 1261 /* Unlinked - check for throttled port. */ 1262 D2("Port %d, successfully unlinked urb", serial->minor); 1263 spin_lock(&serial->serial_lock); 1264 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1265 hso_resubmit_rx_bulk_urb(serial, urb); 1266 spin_unlock(&serial->serial_lock); 1267 } else { 1268 D2("Port %d, status = %d for read urb", serial->minor, status); 1269 return; 1270 } 1271} 1272 1273/* 1274 * This needs to be a tasklet otherwise we will 1275 * end up recursively calling this function. 1276 */ 1277static void hso_unthrottle_tasklet(struct hso_serial *serial) 1278{ 1279 unsigned long flags; 1280 1281 spin_lock_irqsave(&serial->serial_lock, flags); 1282 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1283 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1284 else 1285 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1286 spin_unlock_irqrestore(&serial->serial_lock, flags); 1287} 1288 1289static void hso_unthrottle(struct tty_struct *tty) 1290{ 1291 struct hso_serial *serial = get_serial_by_tty(tty); 1292 1293 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1294} 1295 1296static void hso_unthrottle_workfunc(struct work_struct *work) 1297{ 1298 struct hso_serial *serial = 1299 container_of(work, struct hso_serial, 1300 retry_unthrottle_workqueue); 1301 hso_unthrottle_tasklet(serial); 1302} 1303 1304/* open the requested serial port */ 1305static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1306{ 1307 struct hso_serial *serial = get_serial_by_index(tty->index); 1308 int result; 1309 1310 /* sanity check */ 1311 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1312 WARN_ON(1); 1313 tty->driver_data = NULL; 1314 D1("Failed to open port"); 1315 return -ENODEV; 1316 } 1317 1318 mutex_lock(&serial->parent->mutex); 1319 result = usb_autopm_get_interface(serial->parent->interface); 1320 if (result < 0) 1321 goto err_out; 1322 1323 D1("Opening %d", serial->minor); 1324 kref_get(&serial->parent->ref); 1325 1326 /* setup */ 1327 spin_lock_irq(&serial->serial_lock); 1328 tty->driver_data = serial; 1329 tty_kref_put(serial->tty); 1330 serial->tty = tty_kref_get(tty); 1331 spin_unlock_irq(&serial->serial_lock); 1332 1333 /* check for port already opened, if not set the termios */ 1334 serial->open_count++; 1335 if (serial->open_count == 1) { 1336 serial->rx_state = RX_IDLE; 1337 /* Force default termio settings */ 1338 _hso_serial_set_termios(tty, NULL); 1339 tasklet_init(&serial->unthrottle_tasklet, 1340 (void (*)(unsigned long))hso_unthrottle_tasklet, 1341 (unsigned long)serial); 1342 INIT_WORK(&serial->retry_unthrottle_workqueue, 1343 hso_unthrottle_workfunc); 1344 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1345 if (result) { 1346 hso_stop_serial_device(serial->parent); 1347 serial->open_count--; 1348 kref_put(&serial->parent->ref, hso_serial_ref_free); 1349 } 1350 } else { 1351 D1("Port was already open"); 1352 } 1353 1354 usb_autopm_put_interface(serial->parent->interface); 1355 1356 /* done */ 1357 if (result) 1358 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1359err_out: 1360 mutex_unlock(&serial->parent->mutex); 1361 return result; 1362} 1363 1364/* close the requested serial port */ 1365static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1366{ 1367 struct hso_serial *serial = tty->driver_data; 1368 u8 usb_gone; 1369 1370 D1("Closing serial port"); 1371 1372 /* Open failed, no close cleanup required */ 1373 if (serial == NULL) 1374 return; 1375 1376 mutex_lock(&serial->parent->mutex); 1377 usb_gone = serial->parent->usb_gone; 1378 1379 if (!usb_gone) 1380 usb_autopm_get_interface(serial->parent->interface); 1381 1382 /* reset the rts and dtr */ 1383 /* do the actual close */ 1384 serial->open_count--; 1385 1386 if (serial->open_count <= 0) { 1387 serial->open_count = 0; 1388 spin_lock_irq(&serial->serial_lock); 1389 if (serial->tty == tty) { 1390 serial->tty->driver_data = NULL; 1391 serial->tty = NULL; 1392 tty_kref_put(tty); 1393 } 1394 spin_unlock_irq(&serial->serial_lock); 1395 if (!usb_gone) 1396 hso_stop_serial_device(serial->parent); 1397 tasklet_kill(&serial->unthrottle_tasklet); 1398 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1399 } 1400 1401 if (!usb_gone) 1402 usb_autopm_put_interface(serial->parent->interface); 1403 1404 mutex_unlock(&serial->parent->mutex); 1405 1406 kref_put(&serial->parent->ref, hso_serial_ref_free); 1407} 1408 1409/* close the requested serial port */ 1410static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1411 int count) 1412{ 1413 struct hso_serial *serial = get_serial_by_tty(tty); 1414 int space, tx_bytes; 1415 unsigned long flags; 1416 1417 /* sanity check */ 1418 if (serial == NULL) { 1419 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1420 return -ENODEV; 1421 } 1422 1423 spin_lock_irqsave(&serial->serial_lock, flags); 1424 1425 space = serial->tx_data_length - serial->tx_buffer_count; 1426 tx_bytes = (count < space) ? count : space; 1427 1428 if (!tx_bytes) 1429 goto out; 1430 1431 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1432 serial->tx_buffer_count += tx_bytes; 1433 1434out: 1435 spin_unlock_irqrestore(&serial->serial_lock, flags); 1436 1437 hso_kick_transmit(serial); 1438 /* done */ 1439 return tx_bytes; 1440} 1441 1442/* how much room is there for writing */ 1443static int hso_serial_write_room(struct tty_struct *tty) 1444{ 1445 struct hso_serial *serial = get_serial_by_tty(tty); 1446 int room; 1447 unsigned long flags; 1448 1449 spin_lock_irqsave(&serial->serial_lock, flags); 1450 room = serial->tx_data_length - serial->tx_buffer_count; 1451 spin_unlock_irqrestore(&serial->serial_lock, flags); 1452 1453 /* return free room */ 1454 return room; 1455} 1456 1457/* setup the term */ 1458static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1459{ 1460 struct hso_serial *serial = get_serial_by_tty(tty); 1461 unsigned long flags; 1462 1463 if (old) 1464 D5("Termios called with: cflags new[%d] - old[%d]", 1465 tty->termios->c_cflag, old->c_cflag); 1466 1467 /* the actual setup */ 1468 spin_lock_irqsave(&serial->serial_lock, flags); 1469 if (serial->open_count) 1470 _hso_serial_set_termios(tty, old); 1471 else 1472 tty->termios = old; 1473 spin_unlock_irqrestore(&serial->serial_lock, flags); 1474 1475 /* done */ 1476} 1477 1478/* how many characters in the buffer */ 1479static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1480{ 1481 struct hso_serial *serial = get_serial_by_tty(tty); 1482 int chars; 1483 unsigned long flags; 1484 1485 /* sanity check */ 1486 if (serial == NULL) 1487 return 0; 1488 1489 spin_lock_irqsave(&serial->serial_lock, flags); 1490 chars = serial->tx_buffer_count; 1491 spin_unlock_irqrestore(&serial->serial_lock, flags); 1492 1493 return chars; 1494} 1495static int tiocmget_submit_urb(struct hso_serial *serial, 1496 struct hso_tiocmget *tiocmget, 1497 struct usb_device *usb) 1498{ 1499 int result; 1500 1501 if (serial->parent->usb_gone) 1502 return -ENODEV; 1503 usb_fill_int_urb(tiocmget->urb, usb, 1504 usb_rcvintpipe(usb, 1505 tiocmget->endp-> 1506 bEndpointAddress & 0x7F), 1507 &tiocmget->serial_state_notification, 1508 sizeof(struct hso_serial_state_notification), 1509 tiocmget_intr_callback, serial, 1510 tiocmget->endp->bInterval); 1511 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1512 if (result) { 1513 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1514 result); 1515 } 1516 return result; 1517 1518} 1519 1520static void tiocmget_intr_callback(struct urb *urb) 1521{ 1522 struct hso_serial *serial = urb->context; 1523 struct hso_tiocmget *tiocmget; 1524 int status = urb->status; 1525 u16 UART_state_bitmap, prev_UART_state_bitmap; 1526 struct uart_icount *icount; 1527 struct hso_serial_state_notification *serial_state_notification; 1528 struct usb_device *usb; 1529 1530 /* Sanity checks */ 1531 if (!serial) 1532 return; 1533 if (status) { 1534 handle_usb_error(status, __func__, serial->parent); 1535 return; 1536 } 1537 tiocmget = serial->tiocmget; 1538 if (!tiocmget) 1539 return; 1540 usb = serial->parent->usb; 1541 serial_state_notification = &tiocmget->serial_state_notification; 1542 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1543 serial_state_notification->bNotification != B_NOTIFICATION || 1544 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1545 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1546 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1547 dev_warn(&usb->dev, 1548 "hso received invalid serial state notification\n"); 1549 DUMP(serial_state_notification, 1550 sizeof(struct hso_serial_state_notification)); 1551 } else { 1552 1553 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1554 UART_state_bitmap); 1555 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1556 icount = &tiocmget->icount; 1557 spin_lock(&serial->serial_lock); 1558 if ((UART_state_bitmap & B_OVERRUN) != 1559 (prev_UART_state_bitmap & B_OVERRUN)) 1560 icount->parity++; 1561 if ((UART_state_bitmap & B_PARITY) != 1562 (prev_UART_state_bitmap & B_PARITY)) 1563 icount->parity++; 1564 if ((UART_state_bitmap & B_FRAMING) != 1565 (prev_UART_state_bitmap & B_FRAMING)) 1566 icount->frame++; 1567 if ((UART_state_bitmap & B_RING_SIGNAL) && 1568 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1569 icount->rng++; 1570 if ((UART_state_bitmap & B_BREAK) != 1571 (prev_UART_state_bitmap & B_BREAK)) 1572 icount->brk++; 1573 if ((UART_state_bitmap & B_TX_CARRIER) != 1574 (prev_UART_state_bitmap & B_TX_CARRIER)) 1575 icount->dsr++; 1576 if ((UART_state_bitmap & B_RX_CARRIER) != 1577 (prev_UART_state_bitmap & B_RX_CARRIER)) 1578 icount->dcd++; 1579 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1580 spin_unlock(&serial->serial_lock); 1581 tiocmget->intr_completed = 1; 1582 wake_up_interruptible(&tiocmget->waitq); 1583 } 1584 memset(serial_state_notification, 0, 1585 sizeof(struct hso_serial_state_notification)); 1586 tiocmget_submit_urb(serial, 1587 tiocmget, 1588 serial->parent->usb); 1589} 1590 1591/* 1592 * next few functions largely stolen from drivers/serial/serial_core.c 1593 */ 1594/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1595 * - mask passed in arg for lines of interest 1596 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1597 * Caller should use TIOCGICOUNT to see which one it was 1598 */ 1599static int 1600hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1601{ 1602 DECLARE_WAITQUEUE(wait, current); 1603 struct uart_icount cprev, cnow; 1604 struct hso_tiocmget *tiocmget; 1605 int ret; 1606 1607 tiocmget = serial->tiocmget; 1608 if (!tiocmget) 1609 return -ENOENT; 1610 /* 1611 * note the counters on entry 1612 */ 1613 spin_lock_irq(&serial->serial_lock); 1614 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1615 spin_unlock_irq(&serial->serial_lock); 1616 add_wait_queue(&tiocmget->waitq, &wait); 1617 for (;;) { 1618 spin_lock_irq(&serial->serial_lock); 1619 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1620 spin_unlock_irq(&serial->serial_lock); 1621 set_current_state(TASK_INTERRUPTIBLE); 1622 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1623 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1624 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1625 ret = 0; 1626 break; 1627 } 1628 schedule(); 1629 /* see if a signal did it */ 1630 if (signal_pending(current)) { 1631 ret = -ERESTARTSYS; 1632 break; 1633 } 1634 cprev = cnow; 1635 } 1636 current->state = TASK_RUNNING; 1637 remove_wait_queue(&tiocmget->waitq, &wait); 1638 1639 return ret; 1640} 1641 1642/* 1643 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1644 * Return: write counters to the user passed counter struct 1645 * NB: both 1->0 and 0->1 transitions are counted except for 1646 * RI where only 0->1 is counted. 1647 */ 1648static int hso_get_count(struct hso_serial *serial, 1649 struct serial_icounter_struct __user *icnt) 1650{ 1651 struct serial_icounter_struct icount; 1652 struct uart_icount cnow; 1653 struct hso_tiocmget *tiocmget = serial->tiocmget; 1654 1655 memset(&icount, 0, sizeof(struct serial_icounter_struct)); 1656 1657 if (!tiocmget) 1658 return -ENOENT; 1659 spin_lock_irq(&serial->serial_lock); 1660 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1661 spin_unlock_irq(&serial->serial_lock); 1662 1663 icount.cts = cnow.cts; 1664 icount.dsr = cnow.dsr; 1665 icount.rng = cnow.rng; 1666 icount.dcd = cnow.dcd; 1667 icount.rx = cnow.rx; 1668 icount.tx = cnow.tx; 1669 icount.frame = cnow.frame; 1670 icount.overrun = cnow.overrun; 1671 icount.parity = cnow.parity; 1672 icount.brk = cnow.brk; 1673 icount.buf_overrun = cnow.buf_overrun; 1674 1675 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0; 1676} 1677 1678 1679static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1680{ 1681 int retval; 1682 struct hso_serial *serial = get_serial_by_tty(tty); 1683 struct hso_tiocmget *tiocmget; 1684 u16 UART_state_bitmap; 1685 1686 /* sanity check */ 1687 if (!serial) { 1688 D1("no tty structures"); 1689 return -EINVAL; 1690 } 1691 spin_lock_irq(&serial->serial_lock); 1692 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1693 ((serial->dtr_state) ? TIOCM_DTR : 0); 1694 tiocmget = serial->tiocmget; 1695 if (tiocmget) { 1696 1697 UART_state_bitmap = le16_to_cpu( 1698 tiocmget->prev_UART_state_bitmap); 1699 if (UART_state_bitmap & B_RING_SIGNAL) 1700 retval |= TIOCM_RNG; 1701 if (UART_state_bitmap & B_RX_CARRIER) 1702 retval |= TIOCM_CD; 1703 if (UART_state_bitmap & B_TX_CARRIER) 1704 retval |= TIOCM_DSR; 1705 } 1706 spin_unlock_irq(&serial->serial_lock); 1707 return retval; 1708} 1709 1710static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1711 unsigned int set, unsigned int clear) 1712{ 1713 int val = 0; 1714 unsigned long flags; 1715 int if_num; 1716 struct hso_serial *serial = get_serial_by_tty(tty); 1717 1718 /* sanity check */ 1719 if (!serial) { 1720 D1("no tty structures"); 1721 return -EINVAL; 1722 } 1723 1724 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1725 return -EINVAL; 1726 1727 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1728 1729 spin_lock_irqsave(&serial->serial_lock, flags); 1730 if (set & TIOCM_RTS) 1731 serial->rts_state = 1; 1732 if (set & TIOCM_DTR) 1733 serial->dtr_state = 1; 1734 1735 if (clear & TIOCM_RTS) 1736 serial->rts_state = 0; 1737 if (clear & TIOCM_DTR) 1738 serial->dtr_state = 0; 1739 1740 if (serial->dtr_state) 1741 val |= 0x01; 1742 if (serial->rts_state) 1743 val |= 0x02; 1744 1745 spin_unlock_irqrestore(&serial->serial_lock, flags); 1746 1747 return usb_control_msg(serial->parent->usb, 1748 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1749 0x21, val, if_num, NULL, 0, 1750 USB_CTRL_SET_TIMEOUT); 1751} 1752 1753static int hso_serial_ioctl(struct tty_struct *tty, struct file *file, 1754 unsigned int cmd, unsigned long arg) 1755{ 1756 struct hso_serial *serial = get_serial_by_tty(tty); 1757 void __user *uarg = (void __user *)arg; 1758 int ret = 0; 1759 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1760 1761 if (!serial) 1762 return -ENODEV; 1763 switch (cmd) { 1764 case TIOCMIWAIT: 1765 ret = hso_wait_modem_status(serial, arg); 1766 break; 1767 1768 case TIOCGICOUNT: 1769 ret = hso_get_count(serial, uarg); 1770 break; 1771 default: 1772 ret = -ENOIOCTLCMD; 1773 break; 1774 } 1775 return ret; 1776} 1777 1778 1779/* starts a transmit */ 1780static void hso_kick_transmit(struct hso_serial *serial) 1781{ 1782 u8 *temp; 1783 unsigned long flags; 1784 int res; 1785 1786 spin_lock_irqsave(&serial->serial_lock, flags); 1787 if (!serial->tx_buffer_count) 1788 goto out; 1789 1790 if (serial->tx_urb_used) 1791 goto out; 1792 1793 /* Wakeup USB interface if necessary */ 1794 if (hso_get_activity(serial->parent) == -EAGAIN) 1795 goto out; 1796 1797 /* Switch pointers around to avoid memcpy */ 1798 temp = serial->tx_buffer; 1799 serial->tx_buffer = serial->tx_data; 1800 serial->tx_data = temp; 1801 serial->tx_data_count = serial->tx_buffer_count; 1802 serial->tx_buffer_count = 0; 1803 1804 /* If temp is set, it means we switched buffers */ 1805 if (temp && serial->write_data) { 1806 res = serial->write_data(serial); 1807 if (res >= 0) 1808 serial->tx_urb_used = 1; 1809 } 1810out: 1811 spin_unlock_irqrestore(&serial->serial_lock, flags); 1812} 1813 1814/* make a request (for reading and writing data to muxed serial port) */ 1815static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1816 struct urb *ctrl_urb, 1817 struct usb_ctrlrequest *ctrl_req, 1818 u8 *ctrl_urb_data, u32 size) 1819{ 1820 int result; 1821 int pipe; 1822 1823 /* Sanity check */ 1824 if (!serial || !ctrl_urb || !ctrl_req) { 1825 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1826 return -EINVAL; 1827 } 1828 1829 /* initialize */ 1830 ctrl_req->wValue = 0; 1831 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1832 ctrl_req->wLength = cpu_to_le16(size); 1833 1834 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1835 /* Reading command */ 1836 ctrl_req->bRequestType = USB_DIR_IN | 1837 USB_TYPE_OPTION_VENDOR | 1838 USB_RECIP_INTERFACE; 1839 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1840 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1841 } else { 1842 /* Writing command */ 1843 ctrl_req->bRequestType = USB_DIR_OUT | 1844 USB_TYPE_OPTION_VENDOR | 1845 USB_RECIP_INTERFACE; 1846 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1847 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1848 } 1849 /* syslog */ 1850 D2("%s command (%02x) len: %d, port: %d", 1851 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1852 ctrl_req->bRequestType, ctrl_req->wLength, port); 1853 1854 /* Load ctrl urb */ 1855 ctrl_urb->transfer_flags = 0; 1856 usb_fill_control_urb(ctrl_urb, 1857 serial->parent->usb, 1858 pipe, 1859 (u8 *) ctrl_req, 1860 ctrl_urb_data, size, ctrl_callback, serial); 1861 /* Send it on merry way */ 1862 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1863 if (result) { 1864 dev_err(&ctrl_urb->dev->dev, 1865 "%s failed submit ctrl_urb %d type %d\n", __func__, 1866 result, type); 1867 return result; 1868 } 1869 1870 /* done */ 1871 return size; 1872} 1873 1874/* called by intr_callback when read occurs */ 1875static int hso_mux_serial_read(struct hso_serial *serial) 1876{ 1877 if (!serial) 1878 return -EINVAL; 1879 1880 /* clean data */ 1881 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1882 /* make the request */ 1883 1884 if (serial->num_rx_urbs != 1) { 1885 dev_err(&serial->parent->interface->dev, 1886 "ERROR: mux'd reads with multiple buffers " 1887 "not possible\n"); 1888 return 0; 1889 } 1890 return mux_device_request(serial, 1891 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1892 serial->parent->port_spec & HSO_PORT_MASK, 1893 serial->rx_urb[0], 1894 &serial->ctrl_req_rx, 1895 serial->rx_data[0], serial->rx_data_length); 1896} 1897 1898/* used for muxed serial port callback (muxed serial read) */ 1899static void intr_callback(struct urb *urb) 1900{ 1901 struct hso_shared_int *shared_int = urb->context; 1902 struct hso_serial *serial; 1903 unsigned char *port_req; 1904 int status = urb->status; 1905 int i; 1906 1907 usb_mark_last_busy(urb->dev); 1908 1909 /* sanity check */ 1910 if (!shared_int) 1911 return; 1912 1913 /* status check */ 1914 if (status) { 1915 handle_usb_error(status, __func__, NULL); 1916 return; 1917 } 1918 D4("\n--- Got intr callback 0x%02X ---", status); 1919 1920 /* what request? */ 1921 port_req = urb->transfer_buffer; 1922 D4(" port_req = 0x%.2X\n", *port_req); 1923 /* loop over all muxed ports to find the one sending this */ 1924 for (i = 0; i < 8; i++) { 1925 /* max 8 channels on MUX */ 1926 if (*port_req & (1 << i)) { 1927 serial = get_serial_by_shared_int_and_type(shared_int, 1928 (1 << i)); 1929 if (serial != NULL) { 1930 D1("Pending read interrupt on port %d\n", i); 1931 spin_lock(&serial->serial_lock); 1932 if (serial->rx_state == RX_IDLE && 1933 serial->open_count > 0) { 1934 /* Setup and send a ctrl req read on 1935 * port i */ 1936 if (!serial->rx_urb_filled[0]) { 1937 serial->rx_state = RX_SENT; 1938 hso_mux_serial_read(serial); 1939 } else 1940 serial->rx_state = RX_PENDING; 1941 } else { 1942 D1("Already a read pending on " 1943 "port %d or port not open\n", i); 1944 } 1945 spin_unlock(&serial->serial_lock); 1946 } 1947 } 1948 } 1949 /* Resubmit interrupt urb */ 1950 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1951} 1952 1953/* called for writing to muxed serial port */ 1954static int hso_mux_serial_write_data(struct hso_serial *serial) 1955{ 1956 if (NULL == serial) 1957 return -EINVAL; 1958 1959 return mux_device_request(serial, 1960 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1961 serial->parent->port_spec & HSO_PORT_MASK, 1962 serial->tx_urb, 1963 &serial->ctrl_req_tx, 1964 serial->tx_data, serial->tx_data_count); 1965} 1966 1967/* write callback for Diag and CS port */ 1968static void hso_std_serial_write_bulk_callback(struct urb *urb) 1969{ 1970 struct hso_serial *serial = urb->context; 1971 int status = urb->status; 1972 struct tty_struct *tty; 1973 1974 /* sanity check */ 1975 if (!serial) { 1976 D1("serial == NULL"); 1977 return; 1978 } 1979 1980 spin_lock(&serial->serial_lock); 1981 serial->tx_urb_used = 0; 1982 tty = tty_kref_get(serial->tty); 1983 spin_unlock(&serial->serial_lock); 1984 if (status) { 1985 handle_usb_error(status, __func__, serial->parent); 1986 tty_kref_put(tty); 1987 return; 1988 } 1989 hso_put_activity(serial->parent); 1990 if (tty) { 1991 tty_wakeup(tty); 1992 tty_kref_put(tty); 1993 } 1994 hso_kick_transmit(serial); 1995 1996 D1(" "); 1997} 1998 1999/* called for writing diag or CS serial port */ 2000static int hso_std_serial_write_data(struct hso_serial *serial) 2001{ 2002 int count = serial->tx_data_count; 2003 int result; 2004 2005 usb_fill_bulk_urb(serial->tx_urb, 2006 serial->parent->usb, 2007 usb_sndbulkpipe(serial->parent->usb, 2008 serial->out_endp-> 2009 bEndpointAddress & 0x7F), 2010 serial->tx_data, serial->tx_data_count, 2011 hso_std_serial_write_bulk_callback, serial); 2012 2013 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 2014 if (result) { 2015 dev_warn(&serial->parent->usb->dev, 2016 "Failed to submit urb - res %d\n", result); 2017 return result; 2018 } 2019 2020 return count; 2021} 2022 2023/* callback after read or write on muxed serial port */ 2024static void ctrl_callback(struct urb *urb) 2025{ 2026 struct hso_serial *serial = urb->context; 2027 struct usb_ctrlrequest *req; 2028 int status = urb->status; 2029 struct tty_struct *tty; 2030 2031 /* sanity check */ 2032 if (!serial) 2033 return; 2034 2035 spin_lock(&serial->serial_lock); 2036 serial->tx_urb_used = 0; 2037 tty = tty_kref_get(serial->tty); 2038 spin_unlock(&serial->serial_lock); 2039 if (status) { 2040 handle_usb_error(status, __func__, serial->parent); 2041 tty_kref_put(tty); 2042 return; 2043 } 2044 2045 /* what request? */ 2046 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2047 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2048 D4("Actual length of urb = %d\n", urb->actual_length); 2049 DUMP1(urb->transfer_buffer, urb->actual_length); 2050 2051 if (req->bRequestType == 2052 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2053 /* response to a read command */ 2054 serial->rx_urb_filled[0] = 1; 2055 spin_lock(&serial->serial_lock); 2056 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2057 spin_unlock(&serial->serial_lock); 2058 } else { 2059 hso_put_activity(serial->parent); 2060 if (tty) 2061 tty_wakeup(tty); 2062 /* response to a write command */ 2063 hso_kick_transmit(serial); 2064 } 2065 tty_kref_put(tty); 2066} 2067 2068/* handle RX data for serial port */ 2069static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2070{ 2071 struct tty_struct *tty; 2072 int write_length_remaining = 0; 2073 int curr_write_len; 2074 2075 /* Sanity check */ 2076 if (urb == NULL || serial == NULL) { 2077 D1("serial = NULL"); 2078 return -2; 2079 } 2080 2081 /* All callers to put_rxbuf_data hold serial_lock */ 2082 tty = tty_kref_get(serial->tty); 2083 2084 /* Push data to tty */ 2085 if (tty) { 2086 write_length_remaining = urb->actual_length - 2087 serial->curr_rx_urb_offset; 2088 D1("data to push to tty"); 2089 while (write_length_remaining) { 2090 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2091 tty_kref_put(tty); 2092 return -1; 2093 } 2094 curr_write_len = tty_insert_flip_string 2095 (tty, urb->transfer_buffer + 2096 serial->curr_rx_urb_offset, 2097 write_length_remaining); 2098 serial->curr_rx_urb_offset += curr_write_len; 2099 write_length_remaining -= curr_write_len; 2100 tty_flip_buffer_push(tty); 2101 } 2102 } 2103 if (write_length_remaining == 0) { 2104 serial->curr_rx_urb_offset = 0; 2105 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2106 } 2107 tty_kref_put(tty); 2108 return write_length_remaining; 2109} 2110 2111 2112/* Base driver functions */ 2113 2114static void hso_log_port(struct hso_device *hso_dev) 2115{ 2116 char *port_type; 2117 char port_dev[20]; 2118 2119 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2120 case HSO_PORT_CONTROL: 2121 port_type = "Control"; 2122 break; 2123 case HSO_PORT_APP: 2124 port_type = "Application"; 2125 break; 2126 case HSO_PORT_GPS: 2127 port_type = "GPS"; 2128 break; 2129 case HSO_PORT_GPS_CONTROL: 2130 port_type = "GPS control"; 2131 break; 2132 case HSO_PORT_APP2: 2133 port_type = "Application2"; 2134 break; 2135 case HSO_PORT_PCSC: 2136 port_type = "PCSC"; 2137 break; 2138 case HSO_PORT_DIAG: 2139 port_type = "Diagnostic"; 2140 break; 2141 case HSO_PORT_DIAG2: 2142 port_type = "Diagnostic2"; 2143 break; 2144 case HSO_PORT_MODEM: 2145 port_type = "Modem"; 2146 break; 2147 case HSO_PORT_NETWORK: 2148 port_type = "Network"; 2149 break; 2150 default: 2151 port_type = "Unknown"; 2152 break; 2153 } 2154 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2155 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2156 } else 2157 sprintf(port_dev, "/dev/%s%d", tty_filename, 2158 dev2ser(hso_dev)->minor); 2159 2160 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2161 port_type, port_dev); 2162} 2163 2164static int hso_start_net_device(struct hso_device *hso_dev) 2165{ 2166 int i, result = 0; 2167 struct hso_net *hso_net = dev2net(hso_dev); 2168 2169 if (!hso_net) 2170 return -ENODEV; 2171 2172 /* send URBs for all read buffers */ 2173 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2174 2175 /* Prep a receive URB */ 2176 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2177 hso_dev->usb, 2178 usb_rcvbulkpipe(hso_dev->usb, 2179 hso_net->in_endp-> 2180 bEndpointAddress & 0x7F), 2181 hso_net->mux_bulk_rx_buf_pool[i], 2182 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2183 hso_net); 2184 2185 /* Put it out there so the device can send us stuff */ 2186 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2187 GFP_NOIO); 2188 if (result) 2189 dev_warn(&hso_dev->usb->dev, 2190 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2191 i, result); 2192 } 2193 2194 return result; 2195} 2196 2197static int hso_stop_net_device(struct hso_device *hso_dev) 2198{ 2199 int i; 2200 struct hso_net *hso_net = dev2net(hso_dev); 2201 2202 if (!hso_net) 2203 return -ENODEV; 2204 2205 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2206 if (hso_net->mux_bulk_rx_urb_pool[i]) 2207 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2208 2209 } 2210 if (hso_net->mux_bulk_tx_urb) 2211 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2212 2213 return 0; 2214} 2215 2216static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2217{ 2218 int i, result = 0; 2219 struct hso_serial *serial = dev2ser(hso_dev); 2220 2221 if (!serial) 2222 return -ENODEV; 2223 2224 /* If it is not the MUX port fill in and submit a bulk urb (already 2225 * allocated in hso_serial_start) */ 2226 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2227 for (i = 0; i < serial->num_rx_urbs; i++) { 2228 usb_fill_bulk_urb(serial->rx_urb[i], 2229 serial->parent->usb, 2230 usb_rcvbulkpipe(serial->parent->usb, 2231 serial->in_endp-> 2232 bEndpointAddress & 2233 0x7F), 2234 serial->rx_data[i], 2235 serial->rx_data_length, 2236 hso_std_serial_read_bulk_callback, 2237 serial); 2238 result = usb_submit_urb(serial->rx_urb[i], flags); 2239 if (result) { 2240 dev_warn(&serial->parent->usb->dev, 2241 "Failed to submit urb - res %d\n", 2242 result); 2243 break; 2244 } 2245 } 2246 } else { 2247 mutex_lock(&serial->shared_int->shared_int_lock); 2248 if (!serial->shared_int->use_count) { 2249 result = 2250 hso_mux_submit_intr_urb(serial->shared_int, 2251 hso_dev->usb, flags); 2252 } 2253 serial->shared_int->use_count++; 2254 mutex_unlock(&serial->shared_int->shared_int_lock); 2255 } 2256 if (serial->tiocmget) 2257 tiocmget_submit_urb(serial, 2258 serial->tiocmget, 2259 serial->parent->usb); 2260 return result; 2261} 2262 2263static int hso_stop_serial_device(struct hso_device *hso_dev) 2264{ 2265 int i; 2266 struct hso_serial *serial = dev2ser(hso_dev); 2267 struct hso_tiocmget *tiocmget; 2268 2269 if (!serial) 2270 return -ENODEV; 2271 2272 for (i = 0; i < serial->num_rx_urbs; i++) { 2273 if (serial->rx_urb[i]) { 2274 usb_kill_urb(serial->rx_urb[i]); 2275 serial->rx_urb_filled[i] = 0; 2276 } 2277 } 2278 serial->curr_rx_urb_idx = 0; 2279 serial->curr_rx_urb_offset = 0; 2280 2281 if (serial->tx_urb) 2282 usb_kill_urb(serial->tx_urb); 2283 2284 if (serial->shared_int) { 2285 mutex_lock(&serial->shared_int->shared_int_lock); 2286 if (serial->shared_int->use_count && 2287 (--serial->shared_int->use_count == 0)) { 2288 struct urb *urb; 2289 2290 urb = serial->shared_int->shared_intr_urb; 2291 if (urb) 2292 usb_kill_urb(urb); 2293 } 2294 mutex_unlock(&serial->shared_int->shared_int_lock); 2295 } 2296 tiocmget = serial->tiocmget; 2297 if (tiocmget) { 2298 wake_up_interruptible(&tiocmget->waitq); 2299 usb_kill_urb(tiocmget->urb); 2300 } 2301 2302 return 0; 2303} 2304 2305static void hso_serial_common_free(struct hso_serial *serial) 2306{ 2307 int i; 2308 2309 if (serial->parent->dev) 2310 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2311 2312 tty_unregister_device(tty_drv, serial->minor); 2313 2314 for (i = 0; i < serial->num_rx_urbs; i++) { 2315 /* unlink and free RX URB */ 2316 usb_free_urb(serial->rx_urb[i]); 2317 /* free the RX buffer */ 2318 kfree(serial->rx_data[i]); 2319 } 2320 2321 /* unlink and free TX URB */ 2322 usb_free_urb(serial->tx_urb); 2323 kfree(serial->tx_data); 2324} 2325 2326static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2327 int rx_size, int tx_size) 2328{ 2329 struct device *dev; 2330 int minor; 2331 int i; 2332 2333 minor = get_free_serial_index(); 2334 if (minor < 0) 2335 goto exit; 2336 2337 /* register our minor number */ 2338 serial->parent->dev = tty_register_device(tty_drv, minor, 2339 &serial->parent->interface->dev); 2340 dev = serial->parent->dev; 2341 dev_set_drvdata(dev, serial->parent); 2342 i = device_create_file(dev, &dev_attr_hsotype); 2343 2344 /* fill in specific data for later use */ 2345 serial->minor = minor; 2346 serial->magic = HSO_SERIAL_MAGIC; 2347 spin_lock_init(&serial->serial_lock); 2348 serial->num_rx_urbs = num_urbs; 2349 2350 /* RX, allocate urb and initialize */ 2351 2352 /* prepare our RX buffer */ 2353 serial->rx_data_length = rx_size; 2354 for (i = 0; i < serial->num_rx_urbs; i++) { 2355 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2356 if (!serial->rx_urb[i]) { 2357 dev_err(dev, "Could not allocate urb?\n"); 2358 goto exit; 2359 } 2360 serial->rx_urb[i]->transfer_buffer = NULL; 2361 serial->rx_urb[i]->transfer_buffer_length = 0; 2362 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2363 GFP_KERNEL); 2364 if (!serial->rx_data[i]) { 2365 dev_err(dev, "%s - Out of memory\n", __func__); 2366 goto exit; 2367 } 2368 } 2369 2370 /* TX, allocate urb and initialize */ 2371 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2372 if (!serial->tx_urb) { 2373 dev_err(dev, "Could not allocate urb?\n"); 2374 goto exit; 2375 } 2376 serial->tx_urb->transfer_buffer = NULL; 2377 serial->tx_urb->transfer_buffer_length = 0; 2378 /* prepare our TX buffer */ 2379 serial->tx_data_count = 0; 2380 serial->tx_buffer_count = 0; 2381 serial->tx_data_length = tx_size; 2382 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2383 if (!serial->tx_data) { 2384 dev_err(dev, "%s - Out of memory\n", __func__); 2385 goto exit; 2386 } 2387 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2388 if (!serial->tx_buffer) { 2389 dev_err(dev, "%s - Out of memory\n", __func__); 2390 goto exit; 2391 } 2392 2393 return 0; 2394exit: 2395 hso_serial_common_free(serial); 2396 return -1; 2397} 2398 2399/* Creates a general hso device */ 2400static struct hso_device *hso_create_device(struct usb_interface *intf, 2401 int port_spec) 2402{ 2403 struct hso_device *hso_dev; 2404 2405 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2406 if (!hso_dev) 2407 return NULL; 2408 2409 hso_dev->port_spec = port_spec; 2410 hso_dev->usb = interface_to_usbdev(intf); 2411 hso_dev->interface = intf; 2412 kref_init(&hso_dev->ref); 2413 mutex_init(&hso_dev->mutex); 2414 2415 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2416 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2417 INIT_WORK(&hso_dev->reset_device, reset_device); 2418 2419 return hso_dev; 2420} 2421 2422/* Removes a network device in the network device table */ 2423static int remove_net_device(struct hso_device *hso_dev) 2424{ 2425 int i; 2426 2427 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2428 if (network_table[i] == hso_dev) { 2429 network_table[i] = NULL; 2430 break; 2431 } 2432 } 2433 if (i == HSO_MAX_NET_DEVICES) 2434 return -1; 2435 return 0; 2436} 2437 2438/* Frees our network device */ 2439static void hso_free_net_device(struct hso_device *hso_dev) 2440{ 2441 int i; 2442 struct hso_net *hso_net = dev2net(hso_dev); 2443 2444 if (!hso_net) 2445 return; 2446 2447 remove_net_device(hso_net->parent); 2448 2449 if (hso_net->net) { 2450 unregister_netdev(hso_net->net); 2451 free_netdev(hso_net->net); 2452 } 2453 2454 /* start freeing */ 2455 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2456 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2457 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2458 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2459 } 2460 usb_free_urb(hso_net->mux_bulk_tx_urb); 2461 kfree(hso_net->mux_bulk_tx_buf); 2462 hso_net->mux_bulk_tx_buf = NULL; 2463 2464 kfree(hso_dev); 2465} 2466 2467static const struct net_device_ops hso_netdev_ops = { 2468 .ndo_open = hso_net_open, 2469 .ndo_stop = hso_net_close, 2470 .ndo_start_xmit = hso_net_start_xmit, 2471 .ndo_tx_timeout = hso_net_tx_timeout, 2472}; 2473 2474/* initialize the network interface */ 2475static void hso_net_init(struct net_device *net) 2476{ 2477 struct hso_net *hso_net = netdev_priv(net); 2478 2479 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2480 2481 /* fill in the other fields */ 2482 net->netdev_ops = &hso_netdev_ops; 2483 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2484 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2485 net->type = ARPHRD_NONE; 2486 net->mtu = DEFAULT_MTU - 14; 2487 net->tx_queue_len = 10; 2488 SET_ETHTOOL_OPS(net, &ops); 2489 2490 /* and initialize the semaphore */ 2491 spin_lock_init(&hso_net->net_lock); 2492} 2493 2494/* Adds a network device in the network device table */ 2495static int add_net_device(struct hso_device *hso_dev) 2496{ 2497 int i; 2498 2499 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2500 if (network_table[i] == NULL) { 2501 network_table[i] = hso_dev; 2502 break; 2503 } 2504 } 2505 if (i == HSO_MAX_NET_DEVICES) 2506 return -1; 2507 return 0; 2508} 2509 2510static int hso_rfkill_set_block(void *data, bool blocked) 2511{ 2512 struct hso_device *hso_dev = data; 2513 int enabled = !blocked; 2514 int rv; 2515 2516 mutex_lock(&hso_dev->mutex); 2517 if (hso_dev->usb_gone) 2518 rv = 0; 2519 else 2520 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2521 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2522 USB_CTRL_SET_TIMEOUT); 2523 mutex_unlock(&hso_dev->mutex); 2524 return rv; 2525} 2526 2527static const struct rfkill_ops hso_rfkill_ops = { 2528 .set_block = hso_rfkill_set_block, 2529}; 2530 2531/* Creates and sets up everything for rfkill */ 2532static void hso_create_rfkill(struct hso_device *hso_dev, 2533 struct usb_interface *interface) 2534{ 2535 struct hso_net *hso_net = dev2net(hso_dev); 2536 struct device *dev = &hso_net->net->dev; 2537 char *rfkn; 2538 2539 rfkn = kzalloc(20, GFP_KERNEL); 2540 if (!rfkn) 2541 dev_err(dev, "%s - Out of memory\n", __func__); 2542 2543 snprintf(rfkn, 20, "hso-%d", 2544 interface->altsetting->desc.bInterfaceNumber); 2545 2546 hso_net->rfkill = rfkill_alloc(rfkn, 2547 &interface_to_usbdev(interface)->dev, 2548 RFKILL_TYPE_WWAN, 2549 &hso_rfkill_ops, hso_dev); 2550 if (!hso_net->rfkill) { 2551 dev_err(dev, "%s - Out of memory\n", __func__); 2552 kfree(rfkn); 2553 return; 2554 } 2555 if (rfkill_register(hso_net->rfkill) < 0) { 2556 rfkill_destroy(hso_net->rfkill); 2557 kfree(rfkn); 2558 hso_net->rfkill = NULL; 2559 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2560 return; 2561 } 2562} 2563 2564static struct device_type hso_type = { 2565 .name = "wwan", 2566}; 2567 2568/* Creates our network device */ 2569static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2570 int port_spec) 2571{ 2572 int result, i; 2573 struct net_device *net; 2574 struct hso_net *hso_net; 2575 struct hso_device *hso_dev; 2576 2577 hso_dev = hso_create_device(interface, port_spec); 2578 if (!hso_dev) 2579 return NULL; 2580 2581 /* allocate our network device, then we can put in our private data */ 2582 /* call hso_net_init to do the basic initialization */ 2583 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2584 if (!net) { 2585 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2586 goto exit; 2587 } 2588 2589 hso_net = netdev_priv(net); 2590 2591 hso_dev->port_data.dev_net = hso_net; 2592 hso_net->net = net; 2593 hso_net->parent = hso_dev; 2594 2595 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2596 USB_DIR_IN); 2597 if (!hso_net->in_endp) { 2598 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2599 goto exit; 2600 } 2601 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2602 USB_DIR_OUT); 2603 if (!hso_net->out_endp) { 2604 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2605 goto exit; 2606 } 2607 SET_NETDEV_DEV(net, &interface->dev); 2608 SET_NETDEV_DEVTYPE(net, &hso_type); 2609 2610 /* registering our net device */ 2611 result = register_netdev(net); 2612 if (result) { 2613 dev_err(&interface->dev, "Failed to register device\n"); 2614 goto exit; 2615 } 2616 2617 /* start allocating */ 2618 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2619 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2620 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2621 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2622 goto exit; 2623 } 2624 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2625 GFP_KERNEL); 2626 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2627 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2628 goto exit; 2629 } 2630 } 2631 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2632 if (!hso_net->mux_bulk_tx_urb) { 2633 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2634 goto exit; 2635 } 2636 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2637 if (!hso_net->mux_bulk_tx_buf) { 2638 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2639 goto exit; 2640 } 2641 2642 add_net_device(hso_dev); 2643 2644 hso_log_port(hso_dev); 2645 2646 hso_create_rfkill(hso_dev, interface); 2647 2648 return hso_dev; 2649exit: 2650 hso_free_net_device(hso_dev); 2651 return NULL; 2652} 2653 2654static void hso_free_tiomget(struct hso_serial *serial) 2655{ 2656 struct hso_tiocmget *tiocmget = serial->tiocmget; 2657 if (tiocmget) { 2658 if (tiocmget->urb) { 2659 usb_free_urb(tiocmget->urb); 2660 tiocmget->urb = NULL; 2661 } 2662 serial->tiocmget = NULL; 2663 kfree(tiocmget); 2664 2665 } 2666} 2667 2668/* Frees an AT channel ( goes for both mux and non-mux ) */ 2669static void hso_free_serial_device(struct hso_device *hso_dev) 2670{ 2671 struct hso_serial *serial = dev2ser(hso_dev); 2672 2673 if (!serial) 2674 return; 2675 set_serial_by_index(serial->minor, NULL); 2676 2677 hso_serial_common_free(serial); 2678 2679 if (serial->shared_int) { 2680 mutex_lock(&serial->shared_int->shared_int_lock); 2681 if (--serial->shared_int->ref_count == 0) 2682 hso_free_shared_int(serial->shared_int); 2683 else 2684 mutex_unlock(&serial->shared_int->shared_int_lock); 2685 } 2686 hso_free_tiomget(serial); 2687 kfree(serial); 2688 kfree(hso_dev); 2689} 2690 2691/* Creates a bulk AT channel */ 2692static struct hso_device *hso_create_bulk_serial_device( 2693 struct usb_interface *interface, int port) 2694{ 2695 struct hso_device *hso_dev; 2696 struct hso_serial *serial; 2697 int num_urbs; 2698 struct hso_tiocmget *tiocmget; 2699 2700 hso_dev = hso_create_device(interface, port); 2701 if (!hso_dev) 2702 return NULL; 2703 2704 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2705 if (!serial) 2706 goto exit; 2707 2708 serial->parent = hso_dev; 2709 hso_dev->port_data.dev_serial = serial; 2710 2711 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2712 num_urbs = 2; 2713 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2714 GFP_KERNEL); 2715 /* it isn't going to break our heart if serial->tiocmget 2716 * allocation fails don't bother checking this. 2717 */ 2718 if (serial->tiocmget) { 2719 tiocmget = serial->tiocmget; 2720 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2721 if (tiocmget->urb) { 2722 mutex_init(&tiocmget->mutex); 2723 init_waitqueue_head(&tiocmget->waitq); 2724 tiocmget->endp = hso_get_ep( 2725 interface, 2726 USB_ENDPOINT_XFER_INT, 2727 USB_DIR_IN); 2728 } else 2729 hso_free_tiomget(serial); 2730 } 2731 } 2732 else 2733 num_urbs = 1; 2734 2735 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2736 BULK_URB_TX_SIZE)) 2737 goto exit; 2738 2739 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2740 USB_DIR_IN); 2741 if (!serial->in_endp) { 2742 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2743 goto exit2; 2744 } 2745 2746 if (! 2747 (serial->out_endp = 2748 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2749 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2750 goto exit2; 2751 } 2752 2753 serial->write_data = hso_std_serial_write_data; 2754 2755 /* and record this serial */ 2756 set_serial_by_index(serial->minor, serial); 2757 2758 /* setup the proc dirs and files if needed */ 2759 hso_log_port(hso_dev); 2760 2761 /* done, return it */ 2762 return hso_dev; 2763 2764exit2: 2765 hso_serial_common_free(serial); 2766exit: 2767 hso_free_tiomget(serial); 2768 kfree(serial); 2769 kfree(hso_dev); 2770 return NULL; 2771} 2772 2773/* Creates a multiplexed AT channel */ 2774static 2775struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2776 int port, 2777 struct hso_shared_int *mux) 2778{ 2779 struct hso_device *hso_dev; 2780 struct hso_serial *serial; 2781 int port_spec; 2782 2783 port_spec = HSO_INTF_MUX; 2784 port_spec &= ~HSO_PORT_MASK; 2785 2786 port_spec |= hso_mux_to_port(port); 2787 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2788 return NULL; 2789 2790 hso_dev = hso_create_device(interface, port_spec); 2791 if (!hso_dev) 2792 return NULL; 2793 2794 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2795 if (!serial) 2796 goto exit; 2797 2798 hso_dev->port_data.dev_serial = serial; 2799 serial->parent = hso_dev; 2800 2801 if (hso_serial_common_create 2802 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2803 goto exit; 2804 2805 serial->tx_data_length--; 2806 serial->write_data = hso_mux_serial_write_data; 2807 2808 serial->shared_int = mux; 2809 mutex_lock(&serial->shared_int->shared_int_lock); 2810 serial->shared_int->ref_count++; 2811 mutex_unlock(&serial->shared_int->shared_int_lock); 2812 2813 /* and record this serial */ 2814 set_serial_by_index(serial->minor, serial); 2815 2816 /* setup the proc dirs and files if needed */ 2817 hso_log_port(hso_dev); 2818 2819 /* done, return it */ 2820 return hso_dev; 2821 2822exit: 2823 if (serial) { 2824 tty_unregister_device(tty_drv, serial->minor); 2825 kfree(serial); 2826 } 2827 if (hso_dev) 2828 kfree(hso_dev); 2829 return NULL; 2830 2831} 2832 2833static void hso_free_shared_int(struct hso_shared_int *mux) 2834{ 2835 usb_free_urb(mux->shared_intr_urb); 2836 kfree(mux->shared_intr_buf); 2837 mutex_unlock(&mux->shared_int_lock); 2838 kfree(mux); 2839} 2840 2841static 2842struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2843{ 2844 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2845 2846 if (!mux) 2847 return NULL; 2848 2849 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2850 USB_DIR_IN); 2851 if (!mux->intr_endp) { 2852 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2853 goto exit; 2854 } 2855 2856 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2857 if (!mux->shared_intr_urb) { 2858 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2859 goto exit; 2860 } 2861 mux->shared_intr_buf = 2862 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2863 GFP_KERNEL); 2864 if (!mux->shared_intr_buf) { 2865 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2866 goto exit; 2867 } 2868 2869 mutex_init(&mux->shared_int_lock); 2870 2871 return mux; 2872 2873exit: 2874 kfree(mux->shared_intr_buf); 2875 usb_free_urb(mux->shared_intr_urb); 2876 kfree(mux); 2877 return NULL; 2878} 2879 2880/* Gets the port spec for a certain interface */ 2881static int hso_get_config_data(struct usb_interface *interface) 2882{ 2883 struct usb_device *usbdev = interface_to_usbdev(interface); 2884 u8 config_data[17]; 2885 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2886 s32 result; 2887 2888 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2889 0x86, 0xC0, 0, 0, config_data, 17, 2890 USB_CTRL_SET_TIMEOUT) != 0x11) { 2891 return -EIO; 2892 } 2893 2894 switch (config_data[if_num]) { 2895 case 0x0: 2896 result = 0; 2897 break; 2898 case 0x1: 2899 result = HSO_PORT_DIAG; 2900 break; 2901 case 0x2: 2902 result = HSO_PORT_GPS; 2903 break; 2904 case 0x3: 2905 result = HSO_PORT_GPS_CONTROL; 2906 break; 2907 case 0x4: 2908 result = HSO_PORT_APP; 2909 break; 2910 case 0x5: 2911 result = HSO_PORT_APP2; 2912 break; 2913 case 0x6: 2914 result = HSO_PORT_CONTROL; 2915 break; 2916 case 0x7: 2917 result = HSO_PORT_NETWORK; 2918 break; 2919 case 0x8: 2920 result = HSO_PORT_MODEM; 2921 break; 2922 case 0x9: 2923 result = HSO_PORT_MSD; 2924 break; 2925 case 0xa: 2926 result = HSO_PORT_PCSC; 2927 break; 2928 case 0xb: 2929 result = HSO_PORT_VOICE; 2930 break; 2931 default: 2932 result = 0; 2933 } 2934 2935 if (result) 2936 result |= HSO_INTF_BULK; 2937 2938 if (config_data[16] & 0x1) 2939 result |= HSO_INFO_CRC_BUG; 2940 2941 return result; 2942} 2943 2944/* called once for each interface upon device insertion */ 2945static int hso_probe(struct usb_interface *interface, 2946 const struct usb_device_id *id) 2947{ 2948 int mux, i, if_num, port_spec; 2949 unsigned char port_mask; 2950 struct hso_device *hso_dev = NULL; 2951 struct hso_shared_int *shared_int; 2952 struct hso_device *tmp_dev = NULL; 2953 2954 if_num = interface->altsetting->desc.bInterfaceNumber; 2955 2956 /* Get the interface/port specification from either driver_info or from 2957 * the device itself */ 2958 if (id->driver_info) 2959 port_spec = ((u32 *)(id->driver_info))[if_num]; 2960 else 2961 port_spec = hso_get_config_data(interface); 2962 2963 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2964 dev_err(&interface->dev, "Not our interface\n"); 2965 return -ENODEV; 2966 } 2967 /* Check if we need to switch to alt interfaces prior to port 2968 * configuration */ 2969 if (interface->num_altsetting > 1) 2970 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2971 interface->needs_remote_wakeup = 1; 2972 2973 /* Allocate new hso device(s) */ 2974 switch (port_spec & HSO_INTF_MASK) { 2975 case HSO_INTF_MUX: 2976 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2977 /* Create the network device */ 2978 if (!disable_net) { 2979 hso_dev = hso_create_net_device(interface, 2980 port_spec); 2981 if (!hso_dev) 2982 goto exit; 2983 tmp_dev = hso_dev; 2984 } 2985 } 2986 2987 if (hso_get_mux_ports(interface, &port_mask)) 2988 /* TODO: de-allocate everything */ 2989 goto exit; 2990 2991 shared_int = hso_create_shared_int(interface); 2992 if (!shared_int) 2993 goto exit; 2994 2995 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2996 if (port_mask & i) { 2997 hso_dev = hso_create_mux_serial_device( 2998 interface, i, shared_int); 2999 if (!hso_dev) 3000 goto exit; 3001 } 3002 } 3003 3004 if (tmp_dev) 3005 hso_dev = tmp_dev; 3006 break; 3007 3008 case HSO_INTF_BULK: 3009 /* It's a regular bulk interface */ 3010 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) && 3011 !disable_net) 3012 hso_dev = hso_create_net_device(interface, port_spec); 3013 else 3014 hso_dev = 3015 hso_create_bulk_serial_device(interface, port_spec); 3016 if (!hso_dev) 3017 goto exit; 3018 break; 3019 default: 3020 goto exit; 3021 } 3022 3023 /* save our data pointer in this device */ 3024 usb_set_intfdata(interface, hso_dev); 3025 3026 /* done */ 3027 return 0; 3028exit: 3029 hso_free_interface(interface); 3030 return -ENODEV; 3031} 3032 3033/* device removed, cleaning up */ 3034static void hso_disconnect(struct usb_interface *interface) 3035{ 3036 hso_free_interface(interface); 3037 3038 /* remove reference of our private data */ 3039 usb_set_intfdata(interface, NULL); 3040} 3041 3042static void async_get_intf(struct work_struct *data) 3043{ 3044 struct hso_device *hso_dev = 3045 container_of(data, struct hso_device, async_get_intf); 3046 usb_autopm_get_interface(hso_dev->interface); 3047} 3048 3049static void async_put_intf(struct work_struct *data) 3050{ 3051 struct hso_device *hso_dev = 3052 container_of(data, struct hso_device, async_put_intf); 3053 usb_autopm_put_interface(hso_dev->interface); 3054} 3055 3056static int hso_get_activity(struct hso_device *hso_dev) 3057{ 3058 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3059 if (!hso_dev->is_active) { 3060 hso_dev->is_active = 1; 3061 schedule_work(&hso_dev->async_get_intf); 3062 } 3063 } 3064 3065 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3066 return -EAGAIN; 3067 3068 usb_mark_last_busy(hso_dev->usb); 3069 3070 return 0; 3071} 3072 3073static int hso_put_activity(struct hso_device *hso_dev) 3074{ 3075 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3076 if (hso_dev->is_active) { 3077 hso_dev->is_active = 0; 3078 schedule_work(&hso_dev->async_put_intf); 3079 return -EAGAIN; 3080 } 3081 } 3082 hso_dev->is_active = 0; 3083 return 0; 3084} 3085 3086/* called by kernel when we need to suspend device */ 3087static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3088{ 3089 int i, result; 3090 3091 /* Stop all serial ports */ 3092 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3093 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3094 result = hso_stop_serial_device(serial_table[i]); 3095 if (result) 3096 goto out; 3097 } 3098 } 3099 3100 /* Stop all network ports */ 3101 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3102 if (network_table[i] && 3103 (network_table[i]->interface == iface)) { 3104 result = hso_stop_net_device(network_table[i]); 3105 if (result) 3106 goto out; 3107 } 3108 } 3109 3110out: 3111 return 0; 3112} 3113 3114/* called by kernel when we need to resume device */ 3115static int hso_resume(struct usb_interface *iface) 3116{ 3117 int i, result = 0; 3118 struct hso_net *hso_net; 3119 3120 /* Start all serial ports */ 3121 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3122 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3123 if (dev2ser(serial_table[i])->open_count) { 3124 result = 3125 hso_start_serial_device(serial_table[i], GFP_NOIO); 3126 hso_kick_transmit(dev2ser(serial_table[i])); 3127 if (result) 3128 goto out; 3129 } 3130 } 3131 } 3132 3133 /* Start all network ports */ 3134 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3135 if (network_table[i] && 3136 (network_table[i]->interface == iface)) { 3137 hso_net = dev2net(network_table[i]); 3138 if (hso_net->flags & IFF_UP) { 3139 /* First transmit any lingering data, 3140 then restart the device. */ 3141 if (hso_net->skb_tx_buf) { 3142 dev_dbg(&iface->dev, 3143 "Transmitting" 3144 " lingering data\n"); 3145 hso_net_start_xmit(hso_net->skb_tx_buf, 3146 hso_net->net); 3147 hso_net->skb_tx_buf = NULL; 3148 } 3149 result = hso_start_net_device(network_table[i]); 3150 if (result) 3151 goto out; 3152 } 3153 } 3154 } 3155 3156out: 3157 return result; 3158} 3159 3160static void reset_device(struct work_struct *data) 3161{ 3162 struct hso_device *hso_dev = 3163 container_of(data, struct hso_device, reset_device); 3164 struct usb_device *usb = hso_dev->usb; 3165 int result; 3166 3167 if (hso_dev->usb_gone) { 3168 D1("No reset during disconnect\n"); 3169 } else { 3170 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3171 if (result < 0) 3172 D1("unable to lock device for reset: %d\n", result); 3173 else { 3174 usb_reset_device(usb); 3175 usb_unlock_device(usb); 3176 } 3177 } 3178} 3179 3180static void hso_serial_ref_free(struct kref *ref) 3181{ 3182 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3183 3184 hso_free_serial_device(hso_dev); 3185} 3186 3187static void hso_free_interface(struct usb_interface *interface) 3188{ 3189 struct hso_serial *hso_dev; 3190 struct tty_struct *tty; 3191 int i; 3192 3193 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3194 if (serial_table[i] && 3195 (serial_table[i]->interface == interface)) { 3196 hso_dev = dev2ser(serial_table[i]); 3197 spin_lock_irq(&hso_dev->serial_lock); 3198 tty = tty_kref_get(hso_dev->tty); 3199 spin_unlock_irq(&hso_dev->serial_lock); 3200 if (tty) 3201 tty_hangup(tty); 3202 mutex_lock(&hso_dev->parent->mutex); 3203 tty_kref_put(tty); 3204 hso_dev->parent->usb_gone = 1; 3205 mutex_unlock(&hso_dev->parent->mutex); 3206 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3207 } 3208 } 3209 3210 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3211 if (network_table[i] && 3212 (network_table[i]->interface == interface)) { 3213 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3214 /* hso_stop_net_device doesn't stop the net queue since 3215 * traffic needs to start it again when suspended */ 3216 netif_stop_queue(dev2net(network_table[i])->net); 3217 hso_stop_net_device(network_table[i]); 3218 cancel_work_sync(&network_table[i]->async_put_intf); 3219 cancel_work_sync(&network_table[i]->async_get_intf); 3220 if (rfk) { 3221 rfkill_unregister(rfk); 3222 rfkill_destroy(rfk); 3223 } 3224 hso_free_net_device(network_table[i]); 3225 } 3226 } 3227} 3228 3229/* Helper functions */ 3230 3231/* Get the endpoint ! */ 3232static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3233 int type, int dir) 3234{ 3235 int i; 3236 struct usb_host_interface *iface = intf->cur_altsetting; 3237 struct usb_endpoint_descriptor *endp; 3238 3239 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3240 endp = &iface->endpoint[i].desc; 3241 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3242 (usb_endpoint_type(endp) == type)) 3243 return endp; 3244 } 3245 3246 return NULL; 3247} 3248 3249/* Get the byte that describes which ports are enabled */ 3250static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3251{ 3252 int i; 3253 struct usb_host_interface *iface = intf->cur_altsetting; 3254 3255 if (iface->extralen == 3) { 3256 *ports = iface->extra[2]; 3257 return 0; 3258 } 3259 3260 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3261 if (iface->endpoint[i].extralen == 3) { 3262 *ports = iface->endpoint[i].extra[2]; 3263 return 0; 3264 } 3265 } 3266 3267 return -1; 3268} 3269 3270/* interrupt urb needs to be submitted, used for serial read of muxed port */ 3271static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3272 struct usb_device *usb, gfp_t gfp) 3273{ 3274 int result; 3275 3276 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3277 usb_rcvintpipe(usb, 3278 shared_int->intr_endp->bEndpointAddress & 0x7F), 3279 shared_int->shared_intr_buf, 3280 1, 3281 intr_callback, shared_int, 3282 shared_int->intr_endp->bInterval); 3283 3284 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3285 if (result) 3286 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3287 result); 3288 3289 return result; 3290} 3291 3292/* operations setup of the serial interface */ 3293static const struct tty_operations hso_serial_ops = { 3294 .open = hso_serial_open, 3295 .close = hso_serial_close, 3296 .write = hso_serial_write, 3297 .write_room = hso_serial_write_room, 3298 .ioctl = hso_serial_ioctl, 3299 .set_termios = hso_serial_set_termios, 3300 .chars_in_buffer = hso_serial_chars_in_buffer, 3301 .tiocmget = hso_serial_tiocmget, 3302 .tiocmset = hso_serial_tiocmset, 3303 .unthrottle = hso_unthrottle 3304}; 3305 3306static struct usb_driver hso_driver = { 3307 .name = driver_name, 3308 .probe = hso_probe, 3309 .disconnect = hso_disconnect, 3310 .id_table = hso_ids, 3311 .suspend = hso_suspend, 3312 .resume = hso_resume, 3313 .reset_resume = hso_resume, 3314 .supports_autosuspend = 1, 3315}; 3316 3317static int __init hso_init(void) 3318{ 3319 int i; 3320 int result; 3321 3322 /* put it in the log */ 3323 printk(KERN_INFO "hso: %s\n", version); 3324 3325 /* Initialise the serial table semaphore and table */ 3326 spin_lock_init(&serial_table_lock); 3327 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3328 serial_table[i] = NULL; 3329 3330 /* allocate our driver using the proper amount of supported minors */ 3331 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3332 if (!tty_drv) 3333 return -ENOMEM; 3334 3335 /* fill in all needed values */ 3336 tty_drv->magic = TTY_DRIVER_MAGIC; 3337 tty_drv->owner = THIS_MODULE; 3338 tty_drv->driver_name = driver_name; 3339 tty_drv->name = tty_filename; 3340 3341 /* if major number is provided as parameter, use that one */ 3342 if (tty_major) 3343 tty_drv->major = tty_major; 3344 3345 tty_drv->minor_start = 0; 3346 tty_drv->num = HSO_SERIAL_TTY_MINORS; 3347 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3348 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3349 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3350 tty_drv->init_termios = tty_std_termios; 3351 hso_init_termios(&tty_drv->init_termios); 3352 tty_set_operations(tty_drv, &hso_serial_ops); 3353 3354 /* register the tty driver */ 3355 result = tty_register_driver(tty_drv); 3356 if (result) { 3357 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3358 __func__, result); 3359 return result; 3360 } 3361 3362 /* register this module as an usb driver */ 3363 result = usb_register(&hso_driver); 3364 if (result) { 3365 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3366 result); 3367 /* cleanup serial interface */ 3368 tty_unregister_driver(tty_drv); 3369 return result; 3370 } 3371 3372 /* done */ 3373 return 0; 3374} 3375 3376static void __exit hso_exit(void) 3377{ 3378 printk(KERN_INFO "hso: unloaded\n"); 3379 3380 tty_unregister_driver(tty_drv); 3381 /* deregister the usb driver */ 3382 usb_deregister(&hso_driver); 3383} 3384 3385/* Module definitions */ 3386module_init(hso_init); 3387module_exit(hso_exit); 3388 3389MODULE_AUTHOR(MOD_AUTHOR); 3390MODULE_DESCRIPTION(MOD_DESCRIPTION); 3391MODULE_LICENSE(MOD_LICENSE); 3392 3393/* change the debug level (eg: insmod hso.ko debug=0x04) */ 3394MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3395module_param(debug, int, S_IRUGO | S_IWUSR); 3396 3397/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3398MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3399module_param(tty_major, int, S_IRUGO | S_IWUSR); 3400 3401/* disable network interface (eg: insmod hso.ko disable_net=1) */ 3402MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3403module_param(disable_net, int, S_IRUGO | S_IWUSR); 3404