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