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 struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 302 int type, int dir); 303 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 304 static void hso_free_interface(struct usb_interface *intf); 305 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 306 static int hso_stop_serial_device(struct hso_device *hso_dev); 307 static int hso_start_net_device(struct hso_device *hso_dev); 308 static void hso_free_shared_int(struct hso_shared_int *shared_int); 309 static int hso_stop_net_device(struct hso_device *hso_dev); 310 static void hso_serial_ref_free(struct kref *ref); 311 static void hso_std_serial_read_bulk_callback(struct urb *urb); 312 static int hso_mux_serial_read(struct hso_serial *serial); 313 static void async_get_intf(struct work_struct *data); 314 static void async_put_intf(struct work_struct *data); 315 static int hso_put_activity(struct hso_device *hso_dev); 316 static int hso_get_activity(struct hso_device *hso_dev); 317 static void tiocmget_intr_callback(struct urb *urb); 318 /*****************************************************************************/ 319 /* Helping functions */ 320 /*****************************************************************************/ 321 322 /* #define DEBUG */ 323 324 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 325 { 326 return hso_dev->port_data.dev_net; 327 } 328 329 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 330 { 331 return hso_dev->port_data.dev_serial; 332 } 333 334 /* Debugging functions */ 335 #ifdef DEBUG 336 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 337 unsigned int len) 338 { 339 static char name[255]; 340 341 sprintf(name, "hso[%d:%s]", line_count, func_name); 342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 343 } 344 345 #define DUMP(buf_, len_) \ 346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 347 348 #define DUMP1(buf_, len_) \ 349 do { \ 350 if (0x01 & debug) \ 351 DUMP(buf_, len_); \ 352 } while (0) 353 #else 354 #define DUMP(buf_, len_) 355 #define DUMP1(buf_, len_) 356 #endif 357 358 /* module parameters */ 359 static int debug; 360 static int tty_major; 361 static int disable_net; 362 363 /* driver info */ 364 static const char driver_name[] = "hso"; 365 static const char tty_filename[] = "ttyHS"; 366 static const char *version = __FILE__ ": " MOD_AUTHOR; 367 /* the usb driver itself (registered in hso_init) */ 368 static struct usb_driver hso_driver; 369 /* serial structures */ 370 static struct tty_driver *tty_drv; 371 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 372 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 373 static spinlock_t serial_table_lock; 374 375 static const s32 default_port_spec[] = { 376 HSO_INTF_MUX | HSO_PORT_NETWORK, 377 HSO_INTF_BULK | HSO_PORT_DIAG, 378 HSO_INTF_BULK | HSO_PORT_MODEM, 379 0 380 }; 381 382 static const s32 icon321_port_spec[] = { 383 HSO_INTF_MUX | HSO_PORT_NETWORK, 384 HSO_INTF_BULK | HSO_PORT_DIAG2, 385 HSO_INTF_BULK | HSO_PORT_MODEM, 386 HSO_INTF_BULK | HSO_PORT_DIAG, 387 0 388 }; 389 390 #define default_port_device(vendor, product) \ 391 USB_DEVICE(vendor, product), \ 392 .driver_info = (kernel_ulong_t)default_port_spec 393 394 #define icon321_port_device(vendor, product) \ 395 USB_DEVICE(vendor, product), \ 396 .driver_info = (kernel_ulong_t)icon321_port_spec 397 398 /* list of devices we support */ 399 static const struct usb_device_id hso_ids[] = { 400 {default_port_device(0x0af0, 0x6711)}, 401 {default_port_device(0x0af0, 0x6731)}, 402 {default_port_device(0x0af0, 0x6751)}, 403 {default_port_device(0x0af0, 0x6771)}, 404 {default_port_device(0x0af0, 0x6791)}, 405 {default_port_device(0x0af0, 0x6811)}, 406 {default_port_device(0x0af0, 0x6911)}, 407 {default_port_device(0x0af0, 0x6951)}, 408 {default_port_device(0x0af0, 0x6971)}, 409 {default_port_device(0x0af0, 0x7011)}, 410 {default_port_device(0x0af0, 0x7031)}, 411 {default_port_device(0x0af0, 0x7051)}, 412 {default_port_device(0x0af0, 0x7071)}, 413 {default_port_device(0x0af0, 0x7111)}, 414 {default_port_device(0x0af0, 0x7211)}, 415 {default_port_device(0x0af0, 0x7251)}, 416 {default_port_device(0x0af0, 0x7271)}, 417 {default_port_device(0x0af0, 0x7311)}, 418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 428 {USB_DEVICE(0x0af0, 0x7701)}, 429 {USB_DEVICE(0x0af0, 0x7706)}, 430 {USB_DEVICE(0x0af0, 0x7801)}, 431 {USB_DEVICE(0x0af0, 0x7901)}, 432 {USB_DEVICE(0x0af0, 0x7A01)}, 433 {USB_DEVICE(0x0af0, 0x7A05)}, 434 {USB_DEVICE(0x0af0, 0x8200)}, 435 {USB_DEVICE(0x0af0, 0x8201)}, 436 {USB_DEVICE(0x0af0, 0x8300)}, 437 {USB_DEVICE(0x0af0, 0x8302)}, 438 {USB_DEVICE(0x0af0, 0x8304)}, 439 {USB_DEVICE(0x0af0, 0x8400)}, 440 {USB_DEVICE(0x0af0, 0x8600)}, 441 {USB_DEVICE(0x0af0, 0x8800)}, 442 {USB_DEVICE(0x0af0, 0x8900)}, 443 {USB_DEVICE(0x0af0, 0x9000)}, 444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 445 {USB_DEVICE(0x0af0, 0xd035)}, 446 {USB_DEVICE(0x0af0, 0xd055)}, 447 {USB_DEVICE(0x0af0, 0xd155)}, 448 {USB_DEVICE(0x0af0, 0xd255)}, 449 {USB_DEVICE(0x0af0, 0xd057)}, 450 {USB_DEVICE(0x0af0, 0xd157)}, 451 {USB_DEVICE(0x0af0, 0xd257)}, 452 {USB_DEVICE(0x0af0, 0xd357)}, 453 {USB_DEVICE(0x0af0, 0xd058)}, 454 {USB_DEVICE(0x0af0, 0xc100)}, 455 {} 456 }; 457 MODULE_DEVICE_TABLE(usb, hso_ids); 458 459 /* Sysfs attribute */ 460 static ssize_t hso_sysfs_show_porttype(struct device *dev, 461 struct device_attribute *attr, 462 char *buf) 463 { 464 struct hso_device *hso_dev = dev_get_drvdata(dev); 465 char *port_name; 466 467 if (!hso_dev) 468 return 0; 469 470 switch (hso_dev->port_spec & HSO_PORT_MASK) { 471 case HSO_PORT_CONTROL: 472 port_name = "Control"; 473 break; 474 case HSO_PORT_APP: 475 port_name = "Application"; 476 break; 477 case HSO_PORT_APP2: 478 port_name = "Application2"; 479 break; 480 case HSO_PORT_GPS: 481 port_name = "GPS"; 482 break; 483 case HSO_PORT_GPS_CONTROL: 484 port_name = "GPS Control"; 485 break; 486 case HSO_PORT_PCSC: 487 port_name = "PCSC"; 488 break; 489 case HSO_PORT_DIAG: 490 port_name = "Diagnostic"; 491 break; 492 case HSO_PORT_DIAG2: 493 port_name = "Diagnostic2"; 494 break; 495 case HSO_PORT_MODEM: 496 port_name = "Modem"; 497 break; 498 case HSO_PORT_NETWORK: 499 port_name = "Network"; 500 break; 501 default: 502 port_name = "Unknown"; 503 break; 504 } 505 506 return sprintf(buf, "%s\n", port_name); 507 } 508 static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL); 509 510 static struct attribute *hso_serial_dev_attrs[] = { 511 &dev_attr_hsotype.attr, 512 NULL 513 }; 514 515 ATTRIBUTE_GROUPS(hso_serial_dev); 516 517 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 518 { 519 int idx; 520 521 for (idx = 0; idx < serial->num_rx_urbs; idx++) 522 if (serial->rx_urb[idx] == urb) 523 return idx; 524 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 525 return -1; 526 } 527 528 /* converts mux value to a port spec value */ 529 static u32 hso_mux_to_port(int mux) 530 { 531 u32 result; 532 533 switch (mux) { 534 case 0x1: 535 result = HSO_PORT_CONTROL; 536 break; 537 case 0x2: 538 result = HSO_PORT_APP; 539 break; 540 case 0x4: 541 result = HSO_PORT_PCSC; 542 break; 543 case 0x8: 544 result = HSO_PORT_GPS; 545 break; 546 case 0x10: 547 result = HSO_PORT_APP2; 548 break; 549 default: 550 result = HSO_PORT_NO_PORT; 551 } 552 return result; 553 } 554 555 /* converts port spec value to a mux value */ 556 static u32 hso_port_to_mux(int port) 557 { 558 u32 result; 559 560 switch (port & HSO_PORT_MASK) { 561 case HSO_PORT_CONTROL: 562 result = 0x0; 563 break; 564 case HSO_PORT_APP: 565 result = 0x1; 566 break; 567 case HSO_PORT_PCSC: 568 result = 0x2; 569 break; 570 case HSO_PORT_GPS: 571 result = 0x3; 572 break; 573 case HSO_PORT_APP2: 574 result = 0x4; 575 break; 576 default: 577 result = 0x0; 578 } 579 return result; 580 } 581 582 static struct hso_serial *get_serial_by_shared_int_and_type( 583 struct hso_shared_int *shared_int, 584 int mux) 585 { 586 int i, port; 587 588 port = hso_mux_to_port(mux); 589 590 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 591 if (serial_table[i] && 592 (dev2ser(serial_table[i])->shared_int == shared_int) && 593 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 594 return dev2ser(serial_table[i]); 595 } 596 } 597 598 return NULL; 599 } 600 601 static struct hso_serial *get_serial_by_index(unsigned index) 602 { 603 struct hso_serial *serial = NULL; 604 unsigned long flags; 605 606 spin_lock_irqsave(&serial_table_lock, flags); 607 if (serial_table[index]) 608 serial = dev2ser(serial_table[index]); 609 spin_unlock_irqrestore(&serial_table_lock, flags); 610 611 return serial; 612 } 613 614 static int get_free_serial_index(void) 615 { 616 int index; 617 unsigned long flags; 618 619 spin_lock_irqsave(&serial_table_lock, flags); 620 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 621 if (serial_table[index] == NULL) { 622 spin_unlock_irqrestore(&serial_table_lock, flags); 623 return index; 624 } 625 } 626 spin_unlock_irqrestore(&serial_table_lock, flags); 627 628 pr_err("%s: no free serial devices in table\n", __func__); 629 return -1; 630 } 631 632 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 633 { 634 unsigned long flags; 635 636 spin_lock_irqsave(&serial_table_lock, flags); 637 if (serial) 638 serial_table[index] = serial->parent; 639 else 640 serial_table[index] = NULL; 641 spin_unlock_irqrestore(&serial_table_lock, flags); 642 } 643 644 static void handle_usb_error(int status, const char *function, 645 struct hso_device *hso_dev) 646 { 647 char *explanation; 648 649 switch (status) { 650 case -ENODEV: 651 explanation = "no device"; 652 break; 653 case -ENOENT: 654 explanation = "endpoint not enabled"; 655 break; 656 case -EPIPE: 657 explanation = "endpoint stalled"; 658 break; 659 case -ENOSPC: 660 explanation = "not enough bandwidth"; 661 break; 662 case -ESHUTDOWN: 663 explanation = "device disabled"; 664 break; 665 case -EHOSTUNREACH: 666 explanation = "device suspended"; 667 break; 668 case -EINVAL: 669 case -EAGAIN: 670 case -EFBIG: 671 case -EMSGSIZE: 672 explanation = "internal error"; 673 break; 674 case -EILSEQ: 675 case -EPROTO: 676 case -ETIME: 677 case -ETIMEDOUT: 678 explanation = "protocol error"; 679 if (hso_dev) 680 usb_queue_reset_device(hso_dev->interface); 681 break; 682 default: 683 explanation = "unknown status"; 684 break; 685 } 686 687 /* log a meaningful explanation of an USB status */ 688 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 689 function, explanation, status); 690 } 691 692 /* Network interface functions */ 693 694 /* called when net interface is brought up by ifconfig */ 695 static int hso_net_open(struct net_device *net) 696 { 697 struct hso_net *odev = netdev_priv(net); 698 unsigned long flags = 0; 699 700 if (!odev) { 701 dev_err(&net->dev, "No net device !\n"); 702 return -ENODEV; 703 } 704 705 odev->skb_tx_buf = NULL; 706 707 /* setup environment */ 708 spin_lock_irqsave(&odev->net_lock, flags); 709 odev->rx_parse_state = WAIT_IP; 710 odev->rx_buf_size = 0; 711 odev->rx_buf_missing = sizeof(struct iphdr); 712 spin_unlock_irqrestore(&odev->net_lock, flags); 713 714 /* We are up and running. */ 715 set_bit(HSO_NET_RUNNING, &odev->flags); 716 hso_start_net_device(odev->parent); 717 718 /* Tell the kernel we are ready to start receiving from it */ 719 netif_start_queue(net); 720 721 return 0; 722 } 723 724 /* called when interface is brought down by ifconfig */ 725 static int hso_net_close(struct net_device *net) 726 { 727 struct hso_net *odev = netdev_priv(net); 728 729 /* we don't need the queue anymore */ 730 netif_stop_queue(net); 731 /* no longer running */ 732 clear_bit(HSO_NET_RUNNING, &odev->flags); 733 734 hso_stop_net_device(odev->parent); 735 736 /* done */ 737 return 0; 738 } 739 740 /* USB tells is xmit done, we should start the netqueue again */ 741 static void write_bulk_callback(struct urb *urb) 742 { 743 struct hso_net *odev = urb->context; 744 int status = urb->status; 745 746 /* Sanity check */ 747 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 748 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 749 return; 750 } 751 752 /* Do we still have a valid kernel network device? */ 753 if (!netif_device_present(odev->net)) { 754 dev_err(&urb->dev->dev, "%s: net device not present\n", 755 __func__); 756 return; 757 } 758 759 /* log status, but don't act on it, we don't need to resubmit anything 760 * anyhow */ 761 if (status) 762 handle_usb_error(status, __func__, odev->parent); 763 764 hso_put_activity(odev->parent); 765 766 /* Tell the network interface we are ready for another frame */ 767 netif_wake_queue(odev->net); 768 } 769 770 /* called by kernel when we need to transmit a packet */ 771 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 772 struct net_device *net) 773 { 774 struct hso_net *odev = netdev_priv(net); 775 int result; 776 777 /* Tell the kernel, "No more frames 'til we are done with this one." */ 778 netif_stop_queue(net); 779 if (hso_get_activity(odev->parent) == -EAGAIN) { 780 odev->skb_tx_buf = skb; 781 return NETDEV_TX_OK; 782 } 783 784 /* log if asked */ 785 DUMP1(skb->data, skb->len); 786 /* Copy it from kernel memory to OUR memory */ 787 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 788 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 789 790 /* Fill in the URB for shipping it out. */ 791 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 792 odev->parent->usb, 793 usb_sndbulkpipe(odev->parent->usb, 794 odev->out_endp-> 795 bEndpointAddress & 0x7F), 796 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 797 odev); 798 799 /* Deal with the Zero Length packet problem, I hope */ 800 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 801 802 /* Send the URB on its merry way. */ 803 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 804 if (result) { 805 dev_warn(&odev->parent->interface->dev, 806 "failed mux_bulk_tx_urb %d\n", result); 807 net->stats.tx_errors++; 808 netif_start_queue(net); 809 } else { 810 net->stats.tx_packets++; 811 net->stats.tx_bytes += skb->len; 812 } 813 dev_kfree_skb(skb); 814 /* we're done */ 815 return NETDEV_TX_OK; 816 } 817 818 static const struct ethtool_ops ops = { 819 .get_link = ethtool_op_get_link 820 }; 821 822 /* called when a packet did not ack after watchdogtimeout */ 823 static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue) 824 { 825 struct hso_net *odev = netdev_priv(net); 826 827 if (!odev) 828 return; 829 830 /* Tell syslog we are hosed. */ 831 dev_warn(&net->dev, "Tx timed out.\n"); 832 833 /* Tear the waiting frame off the list */ 834 if (odev->mux_bulk_tx_urb && 835 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 836 usb_unlink_urb(odev->mux_bulk_tx_urb); 837 838 /* Update statistics */ 839 net->stats.tx_errors++; 840 } 841 842 /* make a real packet from the received USB buffer */ 843 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 844 unsigned int count, unsigned char is_eop) 845 { 846 unsigned short temp_bytes; 847 unsigned short buffer_offset = 0; 848 unsigned short frame_len; 849 850 /* log if needed */ 851 hso_dbg(0x1, "Rx %d bytes\n", count); 852 DUMP(ip_pkt, min(128, (int)count)); 853 854 while (count) { 855 switch (odev->rx_parse_state) { 856 case WAIT_IP: 857 /* waiting for IP header. */ 858 /* wanted bytes - size of ip header */ 859 temp_bytes = 860 (count < 861 odev->rx_buf_missing) ? count : odev-> 862 rx_buf_missing; 863 864 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 865 odev->rx_buf_size, ip_pkt + buffer_offset, 866 temp_bytes); 867 868 odev->rx_buf_size += temp_bytes; 869 buffer_offset += temp_bytes; 870 odev->rx_buf_missing -= temp_bytes; 871 count -= temp_bytes; 872 873 if (!odev->rx_buf_missing) { 874 /* header is complete allocate an sk_buffer and 875 * continue to WAIT_DATA */ 876 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 877 878 if ((frame_len > DEFAULT_MRU) || 879 (frame_len < sizeof(struct iphdr))) { 880 dev_err(&odev->net->dev, 881 "Invalid frame (%d) length\n", 882 frame_len); 883 odev->rx_parse_state = WAIT_SYNC; 884 continue; 885 } 886 /* Allocate an sk_buff */ 887 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 888 frame_len); 889 if (!odev->skb_rx_buf) { 890 /* We got no receive buffer. */ 891 hso_dbg(0x1, "could not allocate memory\n"); 892 odev->rx_parse_state = WAIT_SYNC; 893 continue; 894 } 895 896 /* Copy what we got so far. make room for iphdr 897 * after tail. */ 898 skb_put_data(odev->skb_rx_buf, 899 (char *)&(odev->rx_ip_hdr), 900 sizeof(struct iphdr)); 901 902 /* ETH_HLEN */ 903 odev->rx_buf_size = sizeof(struct iphdr); 904 905 /* Filip actually use .tot_len */ 906 odev->rx_buf_missing = 907 frame_len - sizeof(struct iphdr); 908 odev->rx_parse_state = WAIT_DATA; 909 } 910 break; 911 912 case WAIT_DATA: 913 temp_bytes = (count < odev->rx_buf_missing) 914 ? count : odev->rx_buf_missing; 915 916 /* Copy the rest of the bytes that are left in the 917 * buffer into the waiting sk_buf. */ 918 /* Make room for temp_bytes after tail. */ 919 skb_put_data(odev->skb_rx_buf, 920 ip_pkt + buffer_offset, 921 temp_bytes); 922 923 odev->rx_buf_missing -= temp_bytes; 924 count -= temp_bytes; 925 buffer_offset += temp_bytes; 926 odev->rx_buf_size += temp_bytes; 927 if (!odev->rx_buf_missing) { 928 /* Packet is complete. Inject into stack. */ 929 /* We have IP packet here */ 930 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 931 skb_reset_mac_header(odev->skb_rx_buf); 932 933 /* Ship it off to the kernel */ 934 netif_rx(odev->skb_rx_buf); 935 /* No longer our buffer. */ 936 odev->skb_rx_buf = NULL; 937 938 /* update out statistics */ 939 odev->net->stats.rx_packets++; 940 941 odev->net->stats.rx_bytes += odev->rx_buf_size; 942 943 odev->rx_buf_size = 0; 944 odev->rx_buf_missing = sizeof(struct iphdr); 945 odev->rx_parse_state = WAIT_IP; 946 } 947 break; 948 949 case WAIT_SYNC: 950 hso_dbg(0x1, " W_S\n"); 951 count = 0; 952 break; 953 default: 954 hso_dbg(0x1, "\n"); 955 count--; 956 break; 957 } 958 } 959 960 /* Recovery mechanism for WAIT_SYNC state. */ 961 if (is_eop) { 962 if (odev->rx_parse_state == WAIT_SYNC) { 963 odev->rx_parse_state = WAIT_IP; 964 odev->rx_buf_size = 0; 965 odev->rx_buf_missing = sizeof(struct iphdr); 966 } 967 } 968 } 969 970 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 971 { 972 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 973 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 974 975 if (((rest == 5) || (rest == 6)) && 976 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 977 crc_check, 4)) { 978 urb->actual_length -= 4; 979 } 980 } 981 982 /* Moving data from usb to kernel (in interrupt state) */ 983 static void read_bulk_callback(struct urb *urb) 984 { 985 struct hso_net *odev = urb->context; 986 struct net_device *net; 987 int result; 988 unsigned long flags; 989 int status = urb->status; 990 991 /* is al ok? (Filip: Who's Al ?) */ 992 if (status) { 993 handle_usb_error(status, __func__, odev->parent); 994 return; 995 } 996 997 /* Sanity check */ 998 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 999 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1000 return; 1001 } 1002 usb_mark_last_busy(urb->dev); 1003 1004 net = odev->net; 1005 1006 if (!netif_device_present(net)) { 1007 /* Somebody killed our network interface... */ 1008 return; 1009 } 1010 1011 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1012 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1013 1014 /* do we even have a packet? */ 1015 if (urb->actual_length) { 1016 /* Handle the IP stream, add header and push it onto network 1017 * stack if the packet is complete. */ 1018 spin_lock_irqsave(&odev->net_lock, flags); 1019 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1020 (urb->transfer_buffer_length > 1021 urb->actual_length) ? 1 : 0); 1022 spin_unlock_irqrestore(&odev->net_lock, flags); 1023 } 1024 1025 /* We are done with this URB, resubmit it. Prep the USB to wait for 1026 * another frame. Reuse same as received. */ 1027 usb_fill_bulk_urb(urb, 1028 odev->parent->usb, 1029 usb_rcvbulkpipe(odev->parent->usb, 1030 odev->in_endp-> 1031 bEndpointAddress & 0x7F), 1032 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1033 read_bulk_callback, odev); 1034 1035 /* Give this to the USB subsystem so it can tell us when more data 1036 * arrives. */ 1037 result = usb_submit_urb(urb, GFP_ATOMIC); 1038 if (result) 1039 dev_warn(&odev->parent->interface->dev, 1040 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1041 result); 1042 } 1043 1044 /* Serial driver functions */ 1045 1046 static void hso_init_termios(struct ktermios *termios) 1047 { 1048 /* 1049 * The default requirements for this device are: 1050 */ 1051 termios->c_iflag &= 1052 ~(IGNBRK /* disable ignore break */ 1053 | BRKINT /* disable break causes interrupt */ 1054 | PARMRK /* disable mark parity errors */ 1055 | ISTRIP /* disable clear high bit of input characters */ 1056 | INLCR /* disable translate NL to CR */ 1057 | IGNCR /* disable ignore CR */ 1058 | ICRNL /* disable translate CR to NL */ 1059 | IXON); /* disable enable XON/XOFF flow control */ 1060 1061 /* disable postprocess output characters */ 1062 termios->c_oflag &= ~OPOST; 1063 1064 termios->c_lflag &= 1065 ~(ECHO /* disable echo input characters */ 1066 | ECHONL /* disable echo new line */ 1067 | ICANON /* disable erase, kill, werase, and rprnt 1068 special characters */ 1069 | ISIG /* disable interrupt, quit, and suspend special 1070 characters */ 1071 | IEXTEN); /* disable non-POSIX special characters */ 1072 1073 termios->c_cflag &= 1074 ~(CSIZE /* no size */ 1075 | PARENB /* disable parity bit */ 1076 | CBAUD /* clear current baud rate */ 1077 | CBAUDEX); /* clear current buad rate */ 1078 1079 termios->c_cflag |= CS8; /* character size 8 bits */ 1080 1081 /* baud rate 115200 */ 1082 tty_termios_encode_baud_rate(termios, 115200, 115200); 1083 } 1084 1085 static void _hso_serial_set_termios(struct tty_struct *tty, 1086 struct ktermios *old) 1087 { 1088 struct hso_serial *serial = tty->driver_data; 1089 1090 if (!serial) { 1091 pr_err("%s: no tty structures", __func__); 1092 return; 1093 } 1094 1095 hso_dbg(0x8, "port %d\n", serial->minor); 1096 1097 /* 1098 * Fix up unsupported bits 1099 */ 1100 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1101 1102 tty->termios.c_cflag &= 1103 ~(CSIZE /* no size */ 1104 | PARENB /* disable parity bit */ 1105 | CBAUD /* clear current baud rate */ 1106 | CBAUDEX); /* clear current buad rate */ 1107 1108 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1109 1110 /* baud rate 115200 */ 1111 tty_encode_baud_rate(tty, 115200, 115200); 1112 } 1113 1114 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1115 { 1116 int result; 1117 /* We are done with this URB, resubmit it. Prep the USB to wait for 1118 * another frame */ 1119 usb_fill_bulk_urb(urb, serial->parent->usb, 1120 usb_rcvbulkpipe(serial->parent->usb, 1121 serial->in_endp-> 1122 bEndpointAddress & 0x7F), 1123 urb->transfer_buffer, serial->rx_data_length, 1124 hso_std_serial_read_bulk_callback, serial); 1125 /* Give this to the USB subsystem so it can tell us when more data 1126 * arrives. */ 1127 result = usb_submit_urb(urb, GFP_ATOMIC); 1128 if (result) { 1129 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1130 __func__, result); 1131 } 1132 } 1133 1134 1135 1136 1137 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1138 { 1139 int count; 1140 struct urb *curr_urb; 1141 1142 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1143 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1144 count = put_rxbuf_data(curr_urb, serial); 1145 if (count == -1) 1146 return; 1147 if (count == 0) { 1148 serial->curr_rx_urb_idx++; 1149 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1150 serial->curr_rx_urb_idx = 0; 1151 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1152 } 1153 } 1154 } 1155 1156 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1157 { 1158 int count = 0; 1159 struct urb *urb; 1160 1161 urb = serial->rx_urb[0]; 1162 if (serial->port.count > 0) { 1163 count = put_rxbuf_data(urb, serial); 1164 if (count == -1) 1165 return; 1166 } 1167 /* Re issue a read as long as we receive data. */ 1168 1169 if (count == 0 && ((urb->actual_length != 0) || 1170 (serial->rx_state == RX_PENDING))) { 1171 serial->rx_state = RX_SENT; 1172 hso_mux_serial_read(serial); 1173 } else 1174 serial->rx_state = RX_IDLE; 1175 } 1176 1177 1178 /* read callback for Diag and CS port */ 1179 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1180 { 1181 struct hso_serial *serial = urb->context; 1182 int status = urb->status; 1183 unsigned long flags; 1184 1185 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1186 1187 /* sanity check */ 1188 if (!serial) { 1189 hso_dbg(0x1, "serial == NULL\n"); 1190 return; 1191 } 1192 if (status) { 1193 handle_usb_error(status, __func__, serial->parent); 1194 return; 1195 } 1196 1197 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1198 DUMP1(urb->transfer_buffer, urb->actual_length); 1199 1200 /* Anyone listening? */ 1201 if (serial->port.count == 0) 1202 return; 1203 1204 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1205 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1206 /* Valid data, handle RX data */ 1207 spin_lock_irqsave(&serial->serial_lock, flags); 1208 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1209 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1210 spin_unlock_irqrestore(&serial->serial_lock, flags); 1211 } 1212 1213 /* 1214 * This needs to be a tasklet otherwise we will 1215 * end up recursively calling this function. 1216 */ 1217 static void hso_unthrottle_tasklet(unsigned long data) 1218 { 1219 struct hso_serial *serial = (struct hso_serial *)data; 1220 unsigned long flags; 1221 1222 spin_lock_irqsave(&serial->serial_lock, flags); 1223 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1224 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1225 else 1226 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1227 spin_unlock_irqrestore(&serial->serial_lock, flags); 1228 } 1229 1230 static void hso_unthrottle(struct tty_struct *tty) 1231 { 1232 struct hso_serial *serial = tty->driver_data; 1233 1234 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1235 } 1236 1237 /* open the requested serial port */ 1238 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1239 { 1240 struct hso_serial *serial = get_serial_by_index(tty->index); 1241 int result; 1242 1243 /* sanity check */ 1244 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1245 WARN_ON(1); 1246 tty->driver_data = NULL; 1247 hso_dbg(0x1, "Failed to open port\n"); 1248 return -ENODEV; 1249 } 1250 1251 mutex_lock(&serial->parent->mutex); 1252 result = usb_autopm_get_interface(serial->parent->interface); 1253 if (result < 0) 1254 goto err_out; 1255 1256 hso_dbg(0x1, "Opening %d\n", serial->minor); 1257 1258 /* setup */ 1259 tty->driver_data = serial; 1260 tty_port_tty_set(&serial->port, tty); 1261 1262 /* check for port already opened, if not set the termios */ 1263 serial->port.count++; 1264 if (serial->port.count == 1) { 1265 serial->rx_state = RX_IDLE; 1266 /* Force default termio settings */ 1267 _hso_serial_set_termios(tty, NULL); 1268 tasklet_init(&serial->unthrottle_tasklet, 1269 hso_unthrottle_tasklet, 1270 (unsigned long)serial); 1271 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1272 if (result) { 1273 hso_stop_serial_device(serial->parent); 1274 serial->port.count--; 1275 } else { 1276 kref_get(&serial->parent->ref); 1277 } 1278 } else { 1279 hso_dbg(0x1, "Port was already open\n"); 1280 } 1281 1282 usb_autopm_put_interface(serial->parent->interface); 1283 1284 /* done */ 1285 if (result) 1286 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1287 err_out: 1288 mutex_unlock(&serial->parent->mutex); 1289 return result; 1290 } 1291 1292 /* close the requested serial port */ 1293 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1294 { 1295 struct hso_serial *serial = tty->driver_data; 1296 u8 usb_gone; 1297 1298 hso_dbg(0x1, "Closing serial port\n"); 1299 1300 /* Open failed, no close cleanup required */ 1301 if (serial == NULL) 1302 return; 1303 1304 mutex_lock(&serial->parent->mutex); 1305 usb_gone = serial->parent->usb_gone; 1306 1307 if (!usb_gone) 1308 usb_autopm_get_interface(serial->parent->interface); 1309 1310 /* reset the rts and dtr */ 1311 /* do the actual close */ 1312 serial->port.count--; 1313 1314 if (serial->port.count <= 0) { 1315 serial->port.count = 0; 1316 tty_port_tty_set(&serial->port, NULL); 1317 if (!usb_gone) 1318 hso_stop_serial_device(serial->parent); 1319 tasklet_kill(&serial->unthrottle_tasklet); 1320 } 1321 1322 if (!usb_gone) 1323 usb_autopm_put_interface(serial->parent->interface); 1324 1325 mutex_unlock(&serial->parent->mutex); 1326 } 1327 1328 /* close the requested serial port */ 1329 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1330 int count) 1331 { 1332 struct hso_serial *serial = tty->driver_data; 1333 int space, tx_bytes; 1334 unsigned long flags; 1335 1336 /* sanity check */ 1337 if (serial == NULL) { 1338 pr_err("%s: serial is NULL\n", __func__); 1339 return -ENODEV; 1340 } 1341 1342 spin_lock_irqsave(&serial->serial_lock, flags); 1343 1344 space = serial->tx_data_length - serial->tx_buffer_count; 1345 tx_bytes = (count < space) ? count : space; 1346 1347 if (!tx_bytes) 1348 goto out; 1349 1350 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1351 serial->tx_buffer_count += tx_bytes; 1352 1353 out: 1354 spin_unlock_irqrestore(&serial->serial_lock, flags); 1355 1356 hso_kick_transmit(serial); 1357 /* done */ 1358 return tx_bytes; 1359 } 1360 1361 /* how much room is there for writing */ 1362 static int hso_serial_write_room(struct tty_struct *tty) 1363 { 1364 struct hso_serial *serial = tty->driver_data; 1365 int room; 1366 unsigned long flags; 1367 1368 spin_lock_irqsave(&serial->serial_lock, flags); 1369 room = serial->tx_data_length - serial->tx_buffer_count; 1370 spin_unlock_irqrestore(&serial->serial_lock, flags); 1371 1372 /* return free room */ 1373 return room; 1374 } 1375 1376 static void hso_serial_cleanup(struct tty_struct *tty) 1377 { 1378 struct hso_serial *serial = tty->driver_data; 1379 1380 if (!serial) 1381 return; 1382 1383 kref_put(&serial->parent->ref, hso_serial_ref_free); 1384 } 1385 1386 /* setup the term */ 1387 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1388 { 1389 struct hso_serial *serial = tty->driver_data; 1390 unsigned long flags; 1391 1392 if (old) 1393 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n", 1394 (unsigned int)tty->termios.c_cflag, 1395 (unsigned int)old->c_cflag); 1396 1397 /* the actual setup */ 1398 spin_lock_irqsave(&serial->serial_lock, flags); 1399 if (serial->port.count) 1400 _hso_serial_set_termios(tty, old); 1401 else 1402 tty->termios = *old; 1403 spin_unlock_irqrestore(&serial->serial_lock, flags); 1404 1405 /* done */ 1406 } 1407 1408 /* how many characters in the buffer */ 1409 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1410 { 1411 struct hso_serial *serial = tty->driver_data; 1412 int chars; 1413 unsigned long flags; 1414 1415 /* sanity check */ 1416 if (serial == NULL) 1417 return 0; 1418 1419 spin_lock_irqsave(&serial->serial_lock, flags); 1420 chars = serial->tx_buffer_count; 1421 spin_unlock_irqrestore(&serial->serial_lock, flags); 1422 1423 return chars; 1424 } 1425 static int tiocmget_submit_urb(struct hso_serial *serial, 1426 struct hso_tiocmget *tiocmget, 1427 struct usb_device *usb) 1428 { 1429 int result; 1430 1431 if (serial->parent->usb_gone) 1432 return -ENODEV; 1433 usb_fill_int_urb(tiocmget->urb, usb, 1434 usb_rcvintpipe(usb, 1435 tiocmget->endp-> 1436 bEndpointAddress & 0x7F), 1437 tiocmget->serial_state_notification, 1438 sizeof(struct hso_serial_state_notification), 1439 tiocmget_intr_callback, serial, 1440 tiocmget->endp->bInterval); 1441 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1442 if (result) { 1443 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1444 result); 1445 } 1446 return result; 1447 1448 } 1449 1450 static void tiocmget_intr_callback(struct urb *urb) 1451 { 1452 struct hso_serial *serial = urb->context; 1453 struct hso_tiocmget *tiocmget; 1454 int status = urb->status; 1455 u16 UART_state_bitmap, prev_UART_state_bitmap; 1456 struct uart_icount *icount; 1457 struct hso_serial_state_notification *serial_state_notification; 1458 struct usb_device *usb; 1459 struct usb_interface *interface; 1460 int if_num; 1461 1462 /* Sanity checks */ 1463 if (!serial) 1464 return; 1465 if (status) { 1466 handle_usb_error(status, __func__, serial->parent); 1467 return; 1468 } 1469 1470 /* tiocmget is only supported on HSO_PORT_MODEM */ 1471 tiocmget = serial->tiocmget; 1472 if (!tiocmget) 1473 return; 1474 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1475 1476 usb = serial->parent->usb; 1477 interface = serial->parent->interface; 1478 1479 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1480 1481 /* wIndex should be the USB interface number of the port to which the 1482 * notification applies, which should always be the Modem port. 1483 */ 1484 serial_state_notification = tiocmget->serial_state_notification; 1485 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1486 serial_state_notification->bNotification != B_NOTIFICATION || 1487 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1488 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1489 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1490 dev_warn(&usb->dev, 1491 "hso received invalid serial state notification\n"); 1492 DUMP(serial_state_notification, 1493 sizeof(struct hso_serial_state_notification)); 1494 } else { 1495 unsigned long flags; 1496 1497 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1498 UART_state_bitmap); 1499 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1500 icount = &tiocmget->icount; 1501 spin_lock_irqsave(&serial->serial_lock, flags); 1502 if ((UART_state_bitmap & B_OVERRUN) != 1503 (prev_UART_state_bitmap & B_OVERRUN)) 1504 icount->parity++; 1505 if ((UART_state_bitmap & B_PARITY) != 1506 (prev_UART_state_bitmap & B_PARITY)) 1507 icount->parity++; 1508 if ((UART_state_bitmap & B_FRAMING) != 1509 (prev_UART_state_bitmap & B_FRAMING)) 1510 icount->frame++; 1511 if ((UART_state_bitmap & B_RING_SIGNAL) && 1512 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1513 icount->rng++; 1514 if ((UART_state_bitmap & B_BREAK) != 1515 (prev_UART_state_bitmap & B_BREAK)) 1516 icount->brk++; 1517 if ((UART_state_bitmap & B_TX_CARRIER) != 1518 (prev_UART_state_bitmap & B_TX_CARRIER)) 1519 icount->dsr++; 1520 if ((UART_state_bitmap & B_RX_CARRIER) != 1521 (prev_UART_state_bitmap & B_RX_CARRIER)) 1522 icount->dcd++; 1523 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1524 spin_unlock_irqrestore(&serial->serial_lock, flags); 1525 tiocmget->intr_completed = 1; 1526 wake_up_interruptible(&tiocmget->waitq); 1527 } 1528 memset(serial_state_notification, 0, 1529 sizeof(struct hso_serial_state_notification)); 1530 tiocmget_submit_urb(serial, 1531 tiocmget, 1532 serial->parent->usb); 1533 } 1534 1535 /* 1536 * next few functions largely stolen from drivers/serial/serial_core.c 1537 */ 1538 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1539 * - mask passed in arg for lines of interest 1540 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1541 * Caller should use TIOCGICOUNT to see which one it was 1542 */ 1543 static int 1544 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1545 { 1546 DECLARE_WAITQUEUE(wait, current); 1547 struct uart_icount cprev, cnow; 1548 struct hso_tiocmget *tiocmget; 1549 int ret; 1550 1551 tiocmget = serial->tiocmget; 1552 if (!tiocmget) 1553 return -ENOENT; 1554 /* 1555 * note the counters on entry 1556 */ 1557 spin_lock_irq(&serial->serial_lock); 1558 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1559 spin_unlock_irq(&serial->serial_lock); 1560 add_wait_queue(&tiocmget->waitq, &wait); 1561 for (;;) { 1562 spin_lock_irq(&serial->serial_lock); 1563 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1564 spin_unlock_irq(&serial->serial_lock); 1565 set_current_state(TASK_INTERRUPTIBLE); 1566 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1567 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1568 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1569 ret = 0; 1570 break; 1571 } 1572 schedule(); 1573 /* see if a signal did it */ 1574 if (signal_pending(current)) { 1575 ret = -ERESTARTSYS; 1576 break; 1577 } 1578 cprev = cnow; 1579 } 1580 __set_current_state(TASK_RUNNING); 1581 remove_wait_queue(&tiocmget->waitq, &wait); 1582 1583 return ret; 1584 } 1585 1586 /* 1587 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1588 * Return: write counters to the user passed counter struct 1589 * NB: both 1->0 and 0->1 transitions are counted except for 1590 * RI where only 0->1 is counted. 1591 */ 1592 static int hso_get_count(struct tty_struct *tty, 1593 struct serial_icounter_struct *icount) 1594 { 1595 struct uart_icount cnow; 1596 struct hso_serial *serial = tty->driver_data; 1597 struct hso_tiocmget *tiocmget = serial->tiocmget; 1598 1599 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1600 1601 if (!tiocmget) 1602 return -ENOENT; 1603 spin_lock_irq(&serial->serial_lock); 1604 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1605 spin_unlock_irq(&serial->serial_lock); 1606 1607 icount->cts = cnow.cts; 1608 icount->dsr = cnow.dsr; 1609 icount->rng = cnow.rng; 1610 icount->dcd = cnow.dcd; 1611 icount->rx = cnow.rx; 1612 icount->tx = cnow.tx; 1613 icount->frame = cnow.frame; 1614 icount->overrun = cnow.overrun; 1615 icount->parity = cnow.parity; 1616 icount->brk = cnow.brk; 1617 icount->buf_overrun = cnow.buf_overrun; 1618 1619 return 0; 1620 } 1621 1622 1623 static int hso_serial_tiocmget(struct tty_struct *tty) 1624 { 1625 int retval; 1626 struct hso_serial *serial = tty->driver_data; 1627 struct hso_tiocmget *tiocmget; 1628 u16 UART_state_bitmap; 1629 1630 /* sanity check */ 1631 if (!serial) { 1632 hso_dbg(0x1, "no tty structures\n"); 1633 return -EINVAL; 1634 } 1635 spin_lock_irq(&serial->serial_lock); 1636 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1637 ((serial->dtr_state) ? TIOCM_DTR : 0); 1638 tiocmget = serial->tiocmget; 1639 if (tiocmget) { 1640 1641 UART_state_bitmap = le16_to_cpu( 1642 tiocmget->prev_UART_state_bitmap); 1643 if (UART_state_bitmap & B_RING_SIGNAL) 1644 retval |= TIOCM_RNG; 1645 if (UART_state_bitmap & B_RX_CARRIER) 1646 retval |= TIOCM_CD; 1647 if (UART_state_bitmap & B_TX_CARRIER) 1648 retval |= TIOCM_DSR; 1649 } 1650 spin_unlock_irq(&serial->serial_lock); 1651 return retval; 1652 } 1653 1654 static int hso_serial_tiocmset(struct tty_struct *tty, 1655 unsigned int set, unsigned int clear) 1656 { 1657 int val = 0; 1658 unsigned long flags; 1659 int if_num; 1660 struct hso_serial *serial = tty->driver_data; 1661 struct usb_interface *interface; 1662 1663 /* sanity check */ 1664 if (!serial) { 1665 hso_dbg(0x1, "no tty structures\n"); 1666 return -EINVAL; 1667 } 1668 1669 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1670 return -EINVAL; 1671 1672 interface = serial->parent->interface; 1673 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1674 1675 spin_lock_irqsave(&serial->serial_lock, flags); 1676 if (set & TIOCM_RTS) 1677 serial->rts_state = 1; 1678 if (set & TIOCM_DTR) 1679 serial->dtr_state = 1; 1680 1681 if (clear & TIOCM_RTS) 1682 serial->rts_state = 0; 1683 if (clear & TIOCM_DTR) 1684 serial->dtr_state = 0; 1685 1686 if (serial->dtr_state) 1687 val |= 0x01; 1688 if (serial->rts_state) 1689 val |= 0x02; 1690 1691 spin_unlock_irqrestore(&serial->serial_lock, flags); 1692 1693 return usb_control_msg(serial->parent->usb, 1694 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1695 0x21, val, if_num, NULL, 0, 1696 USB_CTRL_SET_TIMEOUT); 1697 } 1698 1699 static int hso_serial_ioctl(struct tty_struct *tty, 1700 unsigned int cmd, unsigned long arg) 1701 { 1702 struct hso_serial *serial = tty->driver_data; 1703 int ret = 0; 1704 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1705 1706 if (!serial) 1707 return -ENODEV; 1708 switch (cmd) { 1709 case TIOCMIWAIT: 1710 ret = hso_wait_modem_status(serial, arg); 1711 break; 1712 default: 1713 ret = -ENOIOCTLCMD; 1714 break; 1715 } 1716 return ret; 1717 } 1718 1719 1720 /* starts a transmit */ 1721 static void hso_kick_transmit(struct hso_serial *serial) 1722 { 1723 unsigned long flags; 1724 int res; 1725 1726 spin_lock_irqsave(&serial->serial_lock, flags); 1727 if (!serial->tx_buffer_count) 1728 goto out; 1729 1730 if (serial->tx_urb_used) 1731 goto out; 1732 1733 /* Wakeup USB interface if necessary */ 1734 if (hso_get_activity(serial->parent) == -EAGAIN) 1735 goto out; 1736 1737 /* Switch pointers around to avoid memcpy */ 1738 swap(serial->tx_buffer, serial->tx_data); 1739 serial->tx_data_count = serial->tx_buffer_count; 1740 serial->tx_buffer_count = 0; 1741 1742 /* If serial->tx_data is set, it means we switched buffers */ 1743 if (serial->tx_data && serial->write_data) { 1744 res = serial->write_data(serial); 1745 if (res >= 0) 1746 serial->tx_urb_used = 1; 1747 } 1748 out: 1749 spin_unlock_irqrestore(&serial->serial_lock, flags); 1750 } 1751 1752 /* make a request (for reading and writing data to muxed serial port) */ 1753 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1754 struct urb *ctrl_urb, 1755 struct usb_ctrlrequest *ctrl_req, 1756 u8 *ctrl_urb_data, u32 size) 1757 { 1758 int result; 1759 int pipe; 1760 1761 /* Sanity check */ 1762 if (!serial || !ctrl_urb || !ctrl_req) { 1763 pr_err("%s: Wrong arguments\n", __func__); 1764 return -EINVAL; 1765 } 1766 1767 /* initialize */ 1768 ctrl_req->wValue = 0; 1769 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1770 ctrl_req->wLength = cpu_to_le16(size); 1771 1772 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1773 /* Reading command */ 1774 ctrl_req->bRequestType = USB_DIR_IN | 1775 USB_TYPE_OPTION_VENDOR | 1776 USB_RECIP_INTERFACE; 1777 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1778 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1779 } else { 1780 /* Writing command */ 1781 ctrl_req->bRequestType = USB_DIR_OUT | 1782 USB_TYPE_OPTION_VENDOR | 1783 USB_RECIP_INTERFACE; 1784 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1785 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1786 } 1787 /* syslog */ 1788 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1789 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1790 ctrl_req->bRequestType, ctrl_req->wLength, port); 1791 1792 /* Load ctrl urb */ 1793 ctrl_urb->transfer_flags = 0; 1794 usb_fill_control_urb(ctrl_urb, 1795 serial->parent->usb, 1796 pipe, 1797 (u8 *) ctrl_req, 1798 ctrl_urb_data, size, ctrl_callback, serial); 1799 /* Send it on merry way */ 1800 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1801 if (result) { 1802 dev_err(&ctrl_urb->dev->dev, 1803 "%s failed submit ctrl_urb %d type %d\n", __func__, 1804 result, type); 1805 return result; 1806 } 1807 1808 /* done */ 1809 return size; 1810 } 1811 1812 /* called by intr_callback when read occurs */ 1813 static int hso_mux_serial_read(struct hso_serial *serial) 1814 { 1815 if (!serial) 1816 return -EINVAL; 1817 1818 /* clean data */ 1819 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1820 /* make the request */ 1821 1822 if (serial->num_rx_urbs != 1) { 1823 dev_err(&serial->parent->interface->dev, 1824 "ERROR: mux'd reads with multiple buffers " 1825 "not possible\n"); 1826 return 0; 1827 } 1828 return mux_device_request(serial, 1829 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1830 serial->parent->port_spec & HSO_PORT_MASK, 1831 serial->rx_urb[0], 1832 &serial->ctrl_req_rx, 1833 serial->rx_data[0], serial->rx_data_length); 1834 } 1835 1836 /* used for muxed serial port callback (muxed serial read) */ 1837 static void intr_callback(struct urb *urb) 1838 { 1839 struct hso_shared_int *shared_int = urb->context; 1840 struct hso_serial *serial; 1841 unsigned char *port_req; 1842 int status = urb->status; 1843 unsigned long flags; 1844 int i; 1845 1846 usb_mark_last_busy(urb->dev); 1847 1848 /* sanity check */ 1849 if (!shared_int) 1850 return; 1851 1852 /* status check */ 1853 if (status) { 1854 handle_usb_error(status, __func__, NULL); 1855 return; 1856 } 1857 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1858 1859 /* what request? */ 1860 port_req = urb->transfer_buffer; 1861 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1862 /* loop over all muxed ports to find the one sending this */ 1863 for (i = 0; i < 8; i++) { 1864 /* max 8 channels on MUX */ 1865 if (*port_req & (1 << i)) { 1866 serial = get_serial_by_shared_int_and_type(shared_int, 1867 (1 << i)); 1868 if (serial != NULL) { 1869 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1870 i); 1871 spin_lock_irqsave(&serial->serial_lock, flags); 1872 if (serial->rx_state == RX_IDLE && 1873 serial->port.count > 0) { 1874 /* Setup and send a ctrl req read on 1875 * port i */ 1876 if (!serial->rx_urb_filled[0]) { 1877 serial->rx_state = RX_SENT; 1878 hso_mux_serial_read(serial); 1879 } else 1880 serial->rx_state = RX_PENDING; 1881 } else { 1882 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1883 i); 1884 } 1885 spin_unlock_irqrestore(&serial->serial_lock, 1886 flags); 1887 } 1888 } 1889 } 1890 /* Resubmit interrupt urb */ 1891 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1892 } 1893 1894 /* called for writing to muxed serial port */ 1895 static int hso_mux_serial_write_data(struct hso_serial *serial) 1896 { 1897 if (NULL == serial) 1898 return -EINVAL; 1899 1900 return mux_device_request(serial, 1901 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1902 serial->parent->port_spec & HSO_PORT_MASK, 1903 serial->tx_urb, 1904 &serial->ctrl_req_tx, 1905 serial->tx_data, serial->tx_data_count); 1906 } 1907 1908 /* write callback for Diag and CS port */ 1909 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1910 { 1911 struct hso_serial *serial = urb->context; 1912 int status = urb->status; 1913 unsigned long flags; 1914 1915 /* sanity check */ 1916 if (!serial) { 1917 hso_dbg(0x1, "serial == NULL\n"); 1918 return; 1919 } 1920 1921 spin_lock_irqsave(&serial->serial_lock, flags); 1922 serial->tx_urb_used = 0; 1923 spin_unlock_irqrestore(&serial->serial_lock, flags); 1924 if (status) { 1925 handle_usb_error(status, __func__, serial->parent); 1926 return; 1927 } 1928 hso_put_activity(serial->parent); 1929 tty_port_tty_wakeup(&serial->port); 1930 hso_kick_transmit(serial); 1931 1932 hso_dbg(0x1, "\n"); 1933 } 1934 1935 /* called for writing diag or CS serial port */ 1936 static int hso_std_serial_write_data(struct hso_serial *serial) 1937 { 1938 int count = serial->tx_data_count; 1939 int result; 1940 1941 usb_fill_bulk_urb(serial->tx_urb, 1942 serial->parent->usb, 1943 usb_sndbulkpipe(serial->parent->usb, 1944 serial->out_endp-> 1945 bEndpointAddress & 0x7F), 1946 serial->tx_data, serial->tx_data_count, 1947 hso_std_serial_write_bulk_callback, serial); 1948 1949 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1950 if (result) { 1951 dev_warn(&serial->parent->usb->dev, 1952 "Failed to submit urb - res %d\n", result); 1953 return result; 1954 } 1955 1956 return count; 1957 } 1958 1959 /* callback after read or write on muxed serial port */ 1960 static void ctrl_callback(struct urb *urb) 1961 { 1962 struct hso_serial *serial = urb->context; 1963 struct usb_ctrlrequest *req; 1964 int status = urb->status; 1965 unsigned long flags; 1966 1967 /* sanity check */ 1968 if (!serial) 1969 return; 1970 1971 spin_lock_irqsave(&serial->serial_lock, flags); 1972 serial->tx_urb_used = 0; 1973 spin_unlock_irqrestore(&serial->serial_lock, flags); 1974 if (status) { 1975 handle_usb_error(status, __func__, serial->parent); 1976 return; 1977 } 1978 1979 /* what request? */ 1980 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1981 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1982 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1983 DUMP1(urb->transfer_buffer, urb->actual_length); 1984 1985 if (req->bRequestType == 1986 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1987 /* response to a read command */ 1988 serial->rx_urb_filled[0] = 1; 1989 spin_lock_irqsave(&serial->serial_lock, flags); 1990 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1991 spin_unlock_irqrestore(&serial->serial_lock, flags); 1992 } else { 1993 hso_put_activity(serial->parent); 1994 tty_port_tty_wakeup(&serial->port); 1995 /* response to a write command */ 1996 hso_kick_transmit(serial); 1997 } 1998 } 1999 2000 /* handle RX data for serial port */ 2001 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2002 { 2003 struct tty_struct *tty; 2004 int count; 2005 2006 /* Sanity check */ 2007 if (urb == NULL || serial == NULL) { 2008 hso_dbg(0x1, "serial = NULL\n"); 2009 return -2; 2010 } 2011 2012 tty = tty_port_tty_get(&serial->port); 2013 2014 if (tty && tty_throttled(tty)) { 2015 tty_kref_put(tty); 2016 return -1; 2017 } 2018 2019 /* Push data to tty */ 2020 hso_dbg(0x1, "data to push to tty\n"); 2021 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2022 if (count >= urb->actual_length) { 2023 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2024 urb->actual_length); 2025 tty_flip_buffer_push(&serial->port); 2026 } else { 2027 dev_warn(&serial->parent->usb->dev, 2028 "dropping data, %d bytes lost\n", urb->actual_length); 2029 } 2030 2031 tty_kref_put(tty); 2032 2033 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2034 2035 return 0; 2036 } 2037 2038 2039 /* Base driver functions */ 2040 2041 static void hso_log_port(struct hso_device *hso_dev) 2042 { 2043 char *port_type; 2044 char port_dev[20]; 2045 2046 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2047 case HSO_PORT_CONTROL: 2048 port_type = "Control"; 2049 break; 2050 case HSO_PORT_APP: 2051 port_type = "Application"; 2052 break; 2053 case HSO_PORT_GPS: 2054 port_type = "GPS"; 2055 break; 2056 case HSO_PORT_GPS_CONTROL: 2057 port_type = "GPS control"; 2058 break; 2059 case HSO_PORT_APP2: 2060 port_type = "Application2"; 2061 break; 2062 case HSO_PORT_PCSC: 2063 port_type = "PCSC"; 2064 break; 2065 case HSO_PORT_DIAG: 2066 port_type = "Diagnostic"; 2067 break; 2068 case HSO_PORT_DIAG2: 2069 port_type = "Diagnostic2"; 2070 break; 2071 case HSO_PORT_MODEM: 2072 port_type = "Modem"; 2073 break; 2074 case HSO_PORT_NETWORK: 2075 port_type = "Network"; 2076 break; 2077 default: 2078 port_type = "Unknown"; 2079 break; 2080 } 2081 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2082 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2083 } else 2084 sprintf(port_dev, "/dev/%s%d", tty_filename, 2085 dev2ser(hso_dev)->minor); 2086 2087 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2088 port_type, port_dev); 2089 } 2090 2091 static int hso_start_net_device(struct hso_device *hso_dev) 2092 { 2093 int i, result = 0; 2094 struct hso_net *hso_net = dev2net(hso_dev); 2095 2096 if (!hso_net) 2097 return -ENODEV; 2098 2099 /* send URBs for all read buffers */ 2100 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2101 2102 /* Prep a receive URB */ 2103 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2104 hso_dev->usb, 2105 usb_rcvbulkpipe(hso_dev->usb, 2106 hso_net->in_endp-> 2107 bEndpointAddress & 0x7F), 2108 hso_net->mux_bulk_rx_buf_pool[i], 2109 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2110 hso_net); 2111 2112 /* Put it out there so the device can send us stuff */ 2113 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2114 GFP_NOIO); 2115 if (result) 2116 dev_warn(&hso_dev->usb->dev, 2117 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2118 i, result); 2119 } 2120 2121 return result; 2122 } 2123 2124 static int hso_stop_net_device(struct hso_device *hso_dev) 2125 { 2126 int i; 2127 struct hso_net *hso_net = dev2net(hso_dev); 2128 2129 if (!hso_net) 2130 return -ENODEV; 2131 2132 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2133 if (hso_net->mux_bulk_rx_urb_pool[i]) 2134 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2135 2136 } 2137 if (hso_net->mux_bulk_tx_urb) 2138 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2139 2140 return 0; 2141 } 2142 2143 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2144 { 2145 int i, result = 0; 2146 struct hso_serial *serial = dev2ser(hso_dev); 2147 2148 if (!serial) 2149 return -ENODEV; 2150 2151 /* If it is not the MUX port fill in and submit a bulk urb (already 2152 * allocated in hso_serial_start) */ 2153 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2154 for (i = 0; i < serial->num_rx_urbs; i++) { 2155 usb_fill_bulk_urb(serial->rx_urb[i], 2156 serial->parent->usb, 2157 usb_rcvbulkpipe(serial->parent->usb, 2158 serial->in_endp-> 2159 bEndpointAddress & 2160 0x7F), 2161 serial->rx_data[i], 2162 serial->rx_data_length, 2163 hso_std_serial_read_bulk_callback, 2164 serial); 2165 result = usb_submit_urb(serial->rx_urb[i], flags); 2166 if (result) { 2167 dev_warn(&serial->parent->usb->dev, 2168 "Failed to submit urb - res %d\n", 2169 result); 2170 break; 2171 } 2172 } 2173 } else { 2174 mutex_lock(&serial->shared_int->shared_int_lock); 2175 if (!serial->shared_int->use_count) { 2176 result = 2177 hso_mux_submit_intr_urb(serial->shared_int, 2178 hso_dev->usb, flags); 2179 } 2180 serial->shared_int->use_count++; 2181 mutex_unlock(&serial->shared_int->shared_int_lock); 2182 } 2183 if (serial->tiocmget) 2184 tiocmget_submit_urb(serial, 2185 serial->tiocmget, 2186 serial->parent->usb); 2187 return result; 2188 } 2189 2190 static int hso_stop_serial_device(struct hso_device *hso_dev) 2191 { 2192 int i; 2193 struct hso_serial *serial = dev2ser(hso_dev); 2194 struct hso_tiocmget *tiocmget; 2195 2196 if (!serial) 2197 return -ENODEV; 2198 2199 for (i = 0; i < serial->num_rx_urbs; i++) { 2200 if (serial->rx_urb[i]) { 2201 usb_kill_urb(serial->rx_urb[i]); 2202 serial->rx_urb_filled[i] = 0; 2203 } 2204 } 2205 serial->curr_rx_urb_idx = 0; 2206 2207 if (serial->tx_urb) 2208 usb_kill_urb(serial->tx_urb); 2209 2210 if (serial->shared_int) { 2211 mutex_lock(&serial->shared_int->shared_int_lock); 2212 if (serial->shared_int->use_count && 2213 (--serial->shared_int->use_count == 0)) { 2214 struct urb *urb; 2215 2216 urb = serial->shared_int->shared_intr_urb; 2217 if (urb) 2218 usb_kill_urb(urb); 2219 } 2220 mutex_unlock(&serial->shared_int->shared_int_lock); 2221 } 2222 tiocmget = serial->tiocmget; 2223 if (tiocmget) { 2224 wake_up_interruptible(&tiocmget->waitq); 2225 usb_kill_urb(tiocmget->urb); 2226 } 2227 2228 return 0; 2229 } 2230 2231 static void hso_serial_tty_unregister(struct hso_serial *serial) 2232 { 2233 tty_unregister_device(tty_drv, serial->minor); 2234 } 2235 2236 static void hso_serial_common_free(struct hso_serial *serial) 2237 { 2238 int i; 2239 2240 for (i = 0; i < serial->num_rx_urbs; i++) { 2241 /* unlink and free RX URB */ 2242 usb_free_urb(serial->rx_urb[i]); 2243 /* free the RX buffer */ 2244 kfree(serial->rx_data[i]); 2245 } 2246 2247 /* unlink and free TX URB */ 2248 usb_free_urb(serial->tx_urb); 2249 kfree(serial->tx_buffer); 2250 kfree(serial->tx_data); 2251 tty_port_destroy(&serial->port); 2252 } 2253 2254 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2255 int rx_size, int tx_size) 2256 { 2257 int minor; 2258 int i; 2259 2260 tty_port_init(&serial->port); 2261 2262 minor = get_free_serial_index(); 2263 if (minor < 0) 2264 goto exit2; 2265 2266 /* register our minor number */ 2267 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2268 tty_drv, minor, &serial->parent->interface->dev, 2269 serial->parent, hso_serial_dev_groups); 2270 if (IS_ERR(serial->parent->dev)) 2271 goto exit2; 2272 2273 /* fill in specific data for later use */ 2274 serial->minor = minor; 2275 serial->magic = HSO_SERIAL_MAGIC; 2276 spin_lock_init(&serial->serial_lock); 2277 serial->num_rx_urbs = num_urbs; 2278 2279 /* RX, allocate urb and initialize */ 2280 2281 /* prepare our RX buffer */ 2282 serial->rx_data_length = rx_size; 2283 for (i = 0; i < serial->num_rx_urbs; i++) { 2284 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2285 if (!serial->rx_urb[i]) 2286 goto exit; 2287 serial->rx_urb[i]->transfer_buffer = NULL; 2288 serial->rx_urb[i]->transfer_buffer_length = 0; 2289 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2290 GFP_KERNEL); 2291 if (!serial->rx_data[i]) 2292 goto exit; 2293 } 2294 2295 /* TX, allocate urb and initialize */ 2296 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2297 if (!serial->tx_urb) 2298 goto exit; 2299 serial->tx_urb->transfer_buffer = NULL; 2300 serial->tx_urb->transfer_buffer_length = 0; 2301 /* prepare our TX buffer */ 2302 serial->tx_data_count = 0; 2303 serial->tx_buffer_count = 0; 2304 serial->tx_data_length = tx_size; 2305 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2306 if (!serial->tx_data) 2307 goto exit; 2308 2309 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2310 if (!serial->tx_buffer) 2311 goto exit; 2312 2313 return 0; 2314 exit: 2315 hso_serial_tty_unregister(serial); 2316 exit2: 2317 hso_serial_common_free(serial); 2318 return -1; 2319 } 2320 2321 /* Creates a general hso device */ 2322 static struct hso_device *hso_create_device(struct usb_interface *intf, 2323 int port_spec) 2324 { 2325 struct hso_device *hso_dev; 2326 2327 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2328 if (!hso_dev) 2329 return NULL; 2330 2331 hso_dev->port_spec = port_spec; 2332 hso_dev->usb = interface_to_usbdev(intf); 2333 hso_dev->interface = intf; 2334 kref_init(&hso_dev->ref); 2335 mutex_init(&hso_dev->mutex); 2336 2337 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2338 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2339 2340 return hso_dev; 2341 } 2342 2343 /* Removes a network device in the network device table */ 2344 static int remove_net_device(struct hso_device *hso_dev) 2345 { 2346 int i; 2347 2348 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2349 if (network_table[i] == hso_dev) { 2350 network_table[i] = NULL; 2351 break; 2352 } 2353 } 2354 if (i == HSO_MAX_NET_DEVICES) 2355 return -1; 2356 return 0; 2357 } 2358 2359 /* Frees our network device */ 2360 static void hso_free_net_device(struct hso_device *hso_dev) 2361 { 2362 int i; 2363 struct hso_net *hso_net = dev2net(hso_dev); 2364 2365 if (!hso_net) 2366 return; 2367 2368 remove_net_device(hso_net->parent); 2369 2370 if (hso_net->net) 2371 unregister_netdev(hso_net->net); 2372 2373 /* start freeing */ 2374 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2375 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2376 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2377 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2378 } 2379 usb_free_urb(hso_net->mux_bulk_tx_urb); 2380 kfree(hso_net->mux_bulk_tx_buf); 2381 hso_net->mux_bulk_tx_buf = NULL; 2382 2383 if (hso_net->net) 2384 free_netdev(hso_net->net); 2385 2386 kfree(hso_dev); 2387 } 2388 2389 static const struct net_device_ops hso_netdev_ops = { 2390 .ndo_open = hso_net_open, 2391 .ndo_stop = hso_net_close, 2392 .ndo_start_xmit = hso_net_start_xmit, 2393 .ndo_tx_timeout = hso_net_tx_timeout, 2394 }; 2395 2396 /* initialize the network interface */ 2397 static void hso_net_init(struct net_device *net) 2398 { 2399 struct hso_net *hso_net = netdev_priv(net); 2400 2401 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2402 2403 /* fill in the other fields */ 2404 net->netdev_ops = &hso_netdev_ops; 2405 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2406 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2407 net->type = ARPHRD_NONE; 2408 net->mtu = DEFAULT_MTU - 14; 2409 net->tx_queue_len = 10; 2410 net->ethtool_ops = &ops; 2411 2412 /* and initialize the semaphore */ 2413 spin_lock_init(&hso_net->net_lock); 2414 } 2415 2416 /* Adds a network device in the network device table */ 2417 static int add_net_device(struct hso_device *hso_dev) 2418 { 2419 int i; 2420 2421 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2422 if (network_table[i] == NULL) { 2423 network_table[i] = hso_dev; 2424 break; 2425 } 2426 } 2427 if (i == HSO_MAX_NET_DEVICES) 2428 return -1; 2429 return 0; 2430 } 2431 2432 static int hso_rfkill_set_block(void *data, bool blocked) 2433 { 2434 struct hso_device *hso_dev = data; 2435 int enabled = !blocked; 2436 int rv; 2437 2438 mutex_lock(&hso_dev->mutex); 2439 if (hso_dev->usb_gone) 2440 rv = 0; 2441 else 2442 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2443 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2444 USB_CTRL_SET_TIMEOUT); 2445 mutex_unlock(&hso_dev->mutex); 2446 return rv; 2447 } 2448 2449 static const struct rfkill_ops hso_rfkill_ops = { 2450 .set_block = hso_rfkill_set_block, 2451 }; 2452 2453 /* Creates and sets up everything for rfkill */ 2454 static void hso_create_rfkill(struct hso_device *hso_dev, 2455 struct usb_interface *interface) 2456 { 2457 struct hso_net *hso_net = dev2net(hso_dev); 2458 struct device *dev = &hso_net->net->dev; 2459 static u32 rfkill_counter; 2460 2461 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2462 rfkill_counter++); 2463 2464 hso_net->rfkill = rfkill_alloc(hso_net->name, 2465 &interface_to_usbdev(interface)->dev, 2466 RFKILL_TYPE_WWAN, 2467 &hso_rfkill_ops, hso_dev); 2468 if (!hso_net->rfkill) { 2469 dev_err(dev, "%s - Out of memory\n", __func__); 2470 return; 2471 } 2472 if (rfkill_register(hso_net->rfkill) < 0) { 2473 rfkill_destroy(hso_net->rfkill); 2474 hso_net->rfkill = NULL; 2475 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2476 return; 2477 } 2478 } 2479 2480 static struct device_type hso_type = { 2481 .name = "wwan", 2482 }; 2483 2484 /* Creates our network device */ 2485 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2486 int port_spec) 2487 { 2488 int result, i; 2489 struct net_device *net; 2490 struct hso_net *hso_net; 2491 struct hso_device *hso_dev; 2492 2493 hso_dev = hso_create_device(interface, port_spec); 2494 if (!hso_dev) 2495 return NULL; 2496 2497 /* allocate our network device, then we can put in our private data */ 2498 /* call hso_net_init to do the basic initialization */ 2499 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2500 hso_net_init); 2501 if (!net) { 2502 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2503 goto exit; 2504 } 2505 2506 hso_net = netdev_priv(net); 2507 2508 hso_dev->port_data.dev_net = hso_net; 2509 hso_net->net = net; 2510 hso_net->parent = hso_dev; 2511 2512 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2513 USB_DIR_IN); 2514 if (!hso_net->in_endp) { 2515 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2516 goto exit; 2517 } 2518 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2519 USB_DIR_OUT); 2520 if (!hso_net->out_endp) { 2521 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2522 goto exit; 2523 } 2524 SET_NETDEV_DEV(net, &interface->dev); 2525 SET_NETDEV_DEVTYPE(net, &hso_type); 2526 2527 /* start allocating */ 2528 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2529 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2530 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2531 goto exit; 2532 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2533 GFP_KERNEL); 2534 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2535 goto exit; 2536 } 2537 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2538 if (!hso_net->mux_bulk_tx_urb) 2539 goto exit; 2540 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2541 if (!hso_net->mux_bulk_tx_buf) 2542 goto exit; 2543 2544 add_net_device(hso_dev); 2545 2546 /* registering our net device */ 2547 result = register_netdev(net); 2548 if (result) { 2549 dev_err(&interface->dev, "Failed to register device\n"); 2550 goto exit; 2551 } 2552 2553 hso_log_port(hso_dev); 2554 2555 hso_create_rfkill(hso_dev, interface); 2556 2557 return hso_dev; 2558 exit: 2559 hso_free_net_device(hso_dev); 2560 return NULL; 2561 } 2562 2563 static void hso_free_tiomget(struct hso_serial *serial) 2564 { 2565 struct hso_tiocmget *tiocmget; 2566 if (!serial) 2567 return; 2568 tiocmget = serial->tiocmget; 2569 if (tiocmget) { 2570 usb_free_urb(tiocmget->urb); 2571 tiocmget->urb = NULL; 2572 serial->tiocmget = NULL; 2573 kfree(tiocmget->serial_state_notification); 2574 tiocmget->serial_state_notification = NULL; 2575 kfree(tiocmget); 2576 } 2577 } 2578 2579 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2580 static void hso_free_serial_device(struct hso_device *hso_dev) 2581 { 2582 struct hso_serial *serial = dev2ser(hso_dev); 2583 2584 if (!serial) 2585 return; 2586 2587 hso_serial_common_free(serial); 2588 2589 if (serial->shared_int) { 2590 mutex_lock(&serial->shared_int->shared_int_lock); 2591 if (--serial->shared_int->ref_count == 0) 2592 hso_free_shared_int(serial->shared_int); 2593 else 2594 mutex_unlock(&serial->shared_int->shared_int_lock); 2595 } 2596 hso_free_tiomget(serial); 2597 kfree(serial); 2598 kfree(hso_dev); 2599 } 2600 2601 /* Creates a bulk AT channel */ 2602 static struct hso_device *hso_create_bulk_serial_device( 2603 struct usb_interface *interface, int port) 2604 { 2605 struct hso_device *hso_dev; 2606 struct hso_serial *serial; 2607 int num_urbs; 2608 struct hso_tiocmget *tiocmget; 2609 2610 hso_dev = hso_create_device(interface, port); 2611 if (!hso_dev) 2612 return NULL; 2613 2614 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2615 if (!serial) 2616 goto exit; 2617 2618 serial->parent = hso_dev; 2619 hso_dev->port_data.dev_serial = serial; 2620 2621 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2622 num_urbs = 2; 2623 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2624 GFP_KERNEL); 2625 serial->tiocmget->serial_state_notification 2626 = kzalloc(sizeof(struct hso_serial_state_notification), 2627 GFP_KERNEL); 2628 /* it isn't going to break our heart if serial->tiocmget 2629 * allocation fails don't bother checking this. 2630 */ 2631 if (serial->tiocmget && serial->tiocmget->serial_state_notification) { 2632 tiocmget = serial->tiocmget; 2633 tiocmget->endp = hso_get_ep(interface, 2634 USB_ENDPOINT_XFER_INT, 2635 USB_DIR_IN); 2636 if (!tiocmget->endp) { 2637 dev_err(&interface->dev, "Failed to find INT IN ep\n"); 2638 goto exit; 2639 } 2640 2641 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2642 if (tiocmget->urb) { 2643 mutex_init(&tiocmget->mutex); 2644 init_waitqueue_head(&tiocmget->waitq); 2645 } else 2646 hso_free_tiomget(serial); 2647 } 2648 } 2649 else 2650 num_urbs = 1; 2651 2652 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2653 BULK_URB_TX_SIZE)) 2654 goto exit; 2655 2656 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2657 USB_DIR_IN); 2658 if (!serial->in_endp) { 2659 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2660 goto exit2; 2661 } 2662 2663 if (! 2664 (serial->out_endp = 2665 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2666 dev_err(&interface->dev, "Failed to find BULK OUT ep\n"); 2667 goto exit2; 2668 } 2669 2670 serial->write_data = hso_std_serial_write_data; 2671 2672 /* and record this serial */ 2673 set_serial_by_index(serial->minor, serial); 2674 2675 /* setup the proc dirs and files if needed */ 2676 hso_log_port(hso_dev); 2677 2678 /* done, return it */ 2679 return hso_dev; 2680 2681 exit2: 2682 hso_serial_tty_unregister(serial); 2683 hso_serial_common_free(serial); 2684 exit: 2685 hso_free_tiomget(serial); 2686 kfree(serial); 2687 kfree(hso_dev); 2688 return NULL; 2689 } 2690 2691 /* Creates a multiplexed AT channel */ 2692 static 2693 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2694 int port, 2695 struct hso_shared_int *mux) 2696 { 2697 struct hso_device *hso_dev; 2698 struct hso_serial *serial; 2699 int port_spec; 2700 2701 port_spec = HSO_INTF_MUX; 2702 port_spec &= ~HSO_PORT_MASK; 2703 2704 port_spec |= hso_mux_to_port(port); 2705 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2706 return NULL; 2707 2708 hso_dev = hso_create_device(interface, port_spec); 2709 if (!hso_dev) 2710 return NULL; 2711 2712 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2713 if (!serial) 2714 goto exit; 2715 2716 hso_dev->port_data.dev_serial = serial; 2717 serial->parent = hso_dev; 2718 2719 if (hso_serial_common_create 2720 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2721 goto exit; 2722 2723 serial->tx_data_length--; 2724 serial->write_data = hso_mux_serial_write_data; 2725 2726 serial->shared_int = mux; 2727 mutex_lock(&serial->shared_int->shared_int_lock); 2728 serial->shared_int->ref_count++; 2729 mutex_unlock(&serial->shared_int->shared_int_lock); 2730 2731 /* and record this serial */ 2732 set_serial_by_index(serial->minor, serial); 2733 2734 /* setup the proc dirs and files if needed */ 2735 hso_log_port(hso_dev); 2736 2737 /* done, return it */ 2738 return hso_dev; 2739 2740 exit: 2741 if (serial) { 2742 tty_unregister_device(tty_drv, serial->minor); 2743 kfree(serial); 2744 } 2745 kfree(hso_dev); 2746 return NULL; 2747 2748 } 2749 2750 static void hso_free_shared_int(struct hso_shared_int *mux) 2751 { 2752 usb_free_urb(mux->shared_intr_urb); 2753 kfree(mux->shared_intr_buf); 2754 mutex_unlock(&mux->shared_int_lock); 2755 kfree(mux); 2756 } 2757 2758 static 2759 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2760 { 2761 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2762 2763 if (!mux) 2764 return NULL; 2765 2766 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2767 USB_DIR_IN); 2768 if (!mux->intr_endp) { 2769 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2770 goto exit; 2771 } 2772 2773 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2774 if (!mux->shared_intr_urb) 2775 goto exit; 2776 mux->shared_intr_buf = 2777 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2778 GFP_KERNEL); 2779 if (!mux->shared_intr_buf) 2780 goto exit; 2781 2782 mutex_init(&mux->shared_int_lock); 2783 2784 return mux; 2785 2786 exit: 2787 kfree(mux->shared_intr_buf); 2788 usb_free_urb(mux->shared_intr_urb); 2789 kfree(mux); 2790 return NULL; 2791 } 2792 2793 /* Gets the port spec for a certain interface */ 2794 static int hso_get_config_data(struct usb_interface *interface) 2795 { 2796 struct usb_device *usbdev = interface_to_usbdev(interface); 2797 u8 *config_data = kmalloc(17, GFP_KERNEL); 2798 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2799 s32 result; 2800 2801 if (!config_data) 2802 return -ENOMEM; 2803 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2804 0x86, 0xC0, 0, 0, config_data, 17, 2805 USB_CTRL_SET_TIMEOUT) != 0x11) { 2806 kfree(config_data); 2807 return -EIO; 2808 } 2809 2810 /* check if we have a valid interface */ 2811 if (if_num > 16) { 2812 kfree(config_data); 2813 return -EINVAL; 2814 } 2815 2816 switch (config_data[if_num]) { 2817 case 0x0: 2818 result = 0; 2819 break; 2820 case 0x1: 2821 result = HSO_PORT_DIAG; 2822 break; 2823 case 0x2: 2824 result = HSO_PORT_GPS; 2825 break; 2826 case 0x3: 2827 result = HSO_PORT_GPS_CONTROL; 2828 break; 2829 case 0x4: 2830 result = HSO_PORT_APP; 2831 break; 2832 case 0x5: 2833 result = HSO_PORT_APP2; 2834 break; 2835 case 0x6: 2836 result = HSO_PORT_CONTROL; 2837 break; 2838 case 0x7: 2839 result = HSO_PORT_NETWORK; 2840 break; 2841 case 0x8: 2842 result = HSO_PORT_MODEM; 2843 break; 2844 case 0x9: 2845 result = HSO_PORT_MSD; 2846 break; 2847 case 0xa: 2848 result = HSO_PORT_PCSC; 2849 break; 2850 case 0xb: 2851 result = HSO_PORT_VOICE; 2852 break; 2853 default: 2854 result = 0; 2855 } 2856 2857 if (result) 2858 result |= HSO_INTF_BULK; 2859 2860 if (config_data[16] & 0x1) 2861 result |= HSO_INFO_CRC_BUG; 2862 2863 kfree(config_data); 2864 return result; 2865 } 2866 2867 /* called once for each interface upon device insertion */ 2868 static int hso_probe(struct usb_interface *interface, 2869 const struct usb_device_id *id) 2870 { 2871 int mux, i, if_num, port_spec; 2872 unsigned char port_mask; 2873 struct hso_device *hso_dev = NULL; 2874 struct hso_shared_int *shared_int; 2875 struct hso_device *tmp_dev = NULL; 2876 2877 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2878 dev_err(&interface->dev, "Not our interface\n"); 2879 return -ENODEV; 2880 } 2881 2882 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2883 2884 /* Get the interface/port specification from either driver_info or from 2885 * the device itself */ 2886 if (id->driver_info) { 2887 /* if_num is controlled by the device, driver_info is a 0 terminated 2888 * array. Make sure, the access is in bounds! */ 2889 for (i = 0; i <= if_num; ++i) 2890 if (((u32 *)(id->driver_info))[i] == 0) 2891 goto exit; 2892 port_spec = ((u32 *)(id->driver_info))[if_num]; 2893 } else { 2894 port_spec = hso_get_config_data(interface); 2895 if (port_spec < 0) 2896 goto exit; 2897 } 2898 2899 /* Check if we need to switch to alt interfaces prior to port 2900 * configuration */ 2901 if (interface->num_altsetting > 1) 2902 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2903 interface->needs_remote_wakeup = 1; 2904 2905 /* Allocate new hso device(s) */ 2906 switch (port_spec & HSO_INTF_MASK) { 2907 case HSO_INTF_MUX: 2908 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2909 /* Create the network device */ 2910 if (!disable_net) { 2911 hso_dev = hso_create_net_device(interface, 2912 port_spec); 2913 if (!hso_dev) 2914 goto exit; 2915 tmp_dev = hso_dev; 2916 } 2917 } 2918 2919 if (hso_get_mux_ports(interface, &port_mask)) 2920 /* TODO: de-allocate everything */ 2921 goto exit; 2922 2923 shared_int = hso_create_shared_int(interface); 2924 if (!shared_int) 2925 goto exit; 2926 2927 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2928 if (port_mask & i) { 2929 hso_dev = hso_create_mux_serial_device( 2930 interface, i, shared_int); 2931 if (!hso_dev) 2932 goto exit; 2933 } 2934 } 2935 2936 if (tmp_dev) 2937 hso_dev = tmp_dev; 2938 break; 2939 2940 case HSO_INTF_BULK: 2941 /* It's a regular bulk interface */ 2942 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2943 if (!disable_net) 2944 hso_dev = 2945 hso_create_net_device(interface, port_spec); 2946 } else { 2947 hso_dev = 2948 hso_create_bulk_serial_device(interface, port_spec); 2949 } 2950 if (!hso_dev) 2951 goto exit; 2952 break; 2953 default: 2954 goto exit; 2955 } 2956 2957 /* save our data pointer in this device */ 2958 usb_set_intfdata(interface, hso_dev); 2959 2960 /* done */ 2961 return 0; 2962 exit: 2963 hso_free_interface(interface); 2964 return -ENODEV; 2965 } 2966 2967 /* device removed, cleaning up */ 2968 static void hso_disconnect(struct usb_interface *interface) 2969 { 2970 hso_free_interface(interface); 2971 2972 /* remove reference of our private data */ 2973 usb_set_intfdata(interface, NULL); 2974 } 2975 2976 static void async_get_intf(struct work_struct *data) 2977 { 2978 struct hso_device *hso_dev = 2979 container_of(data, struct hso_device, async_get_intf); 2980 usb_autopm_get_interface(hso_dev->interface); 2981 } 2982 2983 static void async_put_intf(struct work_struct *data) 2984 { 2985 struct hso_device *hso_dev = 2986 container_of(data, struct hso_device, async_put_intf); 2987 usb_autopm_put_interface(hso_dev->interface); 2988 } 2989 2990 static int hso_get_activity(struct hso_device *hso_dev) 2991 { 2992 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2993 if (!hso_dev->is_active) { 2994 hso_dev->is_active = 1; 2995 schedule_work(&hso_dev->async_get_intf); 2996 } 2997 } 2998 2999 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3000 return -EAGAIN; 3001 3002 usb_mark_last_busy(hso_dev->usb); 3003 3004 return 0; 3005 } 3006 3007 static int hso_put_activity(struct hso_device *hso_dev) 3008 { 3009 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3010 if (hso_dev->is_active) { 3011 hso_dev->is_active = 0; 3012 schedule_work(&hso_dev->async_put_intf); 3013 return -EAGAIN; 3014 } 3015 } 3016 hso_dev->is_active = 0; 3017 return 0; 3018 } 3019 3020 /* called by kernel when we need to suspend device */ 3021 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3022 { 3023 int i, result; 3024 3025 /* Stop all serial ports */ 3026 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3027 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3028 result = hso_stop_serial_device(serial_table[i]); 3029 if (result) 3030 goto out; 3031 } 3032 } 3033 3034 /* Stop all network ports */ 3035 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3036 if (network_table[i] && 3037 (network_table[i]->interface == iface)) { 3038 result = hso_stop_net_device(network_table[i]); 3039 if (result) 3040 goto out; 3041 } 3042 } 3043 3044 out: 3045 return 0; 3046 } 3047 3048 /* called by kernel when we need to resume device */ 3049 static int hso_resume(struct usb_interface *iface) 3050 { 3051 int i, result = 0; 3052 struct hso_net *hso_net; 3053 3054 /* Start all serial ports */ 3055 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3056 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3057 if (dev2ser(serial_table[i])->port.count) { 3058 result = 3059 hso_start_serial_device(serial_table[i], GFP_NOIO); 3060 hso_kick_transmit(dev2ser(serial_table[i])); 3061 if (result) 3062 goto out; 3063 } 3064 } 3065 } 3066 3067 /* Start all network ports */ 3068 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3069 if (network_table[i] && 3070 (network_table[i]->interface == iface)) { 3071 hso_net = dev2net(network_table[i]); 3072 if (hso_net->flags & IFF_UP) { 3073 /* First transmit any lingering data, 3074 then restart the device. */ 3075 if (hso_net->skb_tx_buf) { 3076 dev_dbg(&iface->dev, 3077 "Transmitting" 3078 " lingering data\n"); 3079 hso_net_start_xmit(hso_net->skb_tx_buf, 3080 hso_net->net); 3081 hso_net->skb_tx_buf = NULL; 3082 } 3083 result = hso_start_net_device(network_table[i]); 3084 if (result) 3085 goto out; 3086 } 3087 } 3088 } 3089 3090 out: 3091 return result; 3092 } 3093 3094 static void hso_serial_ref_free(struct kref *ref) 3095 { 3096 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3097 3098 hso_free_serial_device(hso_dev); 3099 } 3100 3101 static void hso_free_interface(struct usb_interface *interface) 3102 { 3103 struct hso_serial *serial; 3104 int i; 3105 3106 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3107 if (serial_table[i] && 3108 (serial_table[i]->interface == interface)) { 3109 serial = dev2ser(serial_table[i]); 3110 tty_port_tty_hangup(&serial->port, false); 3111 mutex_lock(&serial->parent->mutex); 3112 serial->parent->usb_gone = 1; 3113 mutex_unlock(&serial->parent->mutex); 3114 cancel_work_sync(&serial_table[i]->async_put_intf); 3115 cancel_work_sync(&serial_table[i]->async_get_intf); 3116 hso_serial_tty_unregister(serial); 3117 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3118 set_serial_by_index(i, NULL); 3119 } 3120 } 3121 3122 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3123 if (network_table[i] && 3124 (network_table[i]->interface == interface)) { 3125 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3126 /* hso_stop_net_device doesn't stop the net queue since 3127 * traffic needs to start it again when suspended */ 3128 netif_stop_queue(dev2net(network_table[i])->net); 3129 hso_stop_net_device(network_table[i]); 3130 cancel_work_sync(&network_table[i]->async_put_intf); 3131 cancel_work_sync(&network_table[i]->async_get_intf); 3132 if (rfk) { 3133 rfkill_unregister(rfk); 3134 rfkill_destroy(rfk); 3135 } 3136 hso_free_net_device(network_table[i]); 3137 } 3138 } 3139 } 3140 3141 /* Helper functions */ 3142 3143 /* Get the endpoint ! */ 3144 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3145 int type, int dir) 3146 { 3147 int i; 3148 struct usb_host_interface *iface = intf->cur_altsetting; 3149 struct usb_endpoint_descriptor *endp; 3150 3151 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3152 endp = &iface->endpoint[i].desc; 3153 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3154 (usb_endpoint_type(endp) == type)) 3155 return endp; 3156 } 3157 3158 return NULL; 3159 } 3160 3161 /* Get the byte that describes which ports are enabled */ 3162 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3163 { 3164 int i; 3165 struct usb_host_interface *iface = intf->cur_altsetting; 3166 3167 if (iface->extralen == 3) { 3168 *ports = iface->extra[2]; 3169 return 0; 3170 } 3171 3172 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3173 if (iface->endpoint[i].extralen == 3) { 3174 *ports = iface->endpoint[i].extra[2]; 3175 return 0; 3176 } 3177 } 3178 3179 return -1; 3180 } 3181 3182 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3183 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3184 struct usb_device *usb, gfp_t gfp) 3185 { 3186 int result; 3187 3188 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3189 usb_rcvintpipe(usb, 3190 shared_int->intr_endp->bEndpointAddress & 0x7F), 3191 shared_int->shared_intr_buf, 3192 1, 3193 intr_callback, shared_int, 3194 shared_int->intr_endp->bInterval); 3195 3196 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3197 if (result) 3198 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3199 result); 3200 3201 return result; 3202 } 3203 3204 /* operations setup of the serial interface */ 3205 static const struct tty_operations hso_serial_ops = { 3206 .open = hso_serial_open, 3207 .close = hso_serial_close, 3208 .write = hso_serial_write, 3209 .write_room = hso_serial_write_room, 3210 .cleanup = hso_serial_cleanup, 3211 .ioctl = hso_serial_ioctl, 3212 .set_termios = hso_serial_set_termios, 3213 .chars_in_buffer = hso_serial_chars_in_buffer, 3214 .tiocmget = hso_serial_tiocmget, 3215 .tiocmset = hso_serial_tiocmset, 3216 .get_icount = hso_get_count, 3217 .unthrottle = hso_unthrottle 3218 }; 3219 3220 static struct usb_driver hso_driver = { 3221 .name = driver_name, 3222 .probe = hso_probe, 3223 .disconnect = hso_disconnect, 3224 .id_table = hso_ids, 3225 .suspend = hso_suspend, 3226 .resume = hso_resume, 3227 .reset_resume = hso_resume, 3228 .supports_autosuspend = 1, 3229 .disable_hub_initiated_lpm = 1, 3230 }; 3231 3232 static int __init hso_init(void) 3233 { 3234 int i; 3235 int result; 3236 3237 /* put it in the log */ 3238 pr_info("%s\n", version); 3239 3240 /* Initialise the serial table semaphore and table */ 3241 spin_lock_init(&serial_table_lock); 3242 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3243 serial_table[i] = NULL; 3244 3245 /* allocate our driver using the proper amount of supported minors */ 3246 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3247 if (!tty_drv) 3248 return -ENOMEM; 3249 3250 /* fill in all needed values */ 3251 tty_drv->driver_name = driver_name; 3252 tty_drv->name = tty_filename; 3253 3254 /* if major number is provided as parameter, use that one */ 3255 if (tty_major) 3256 tty_drv->major = tty_major; 3257 3258 tty_drv->minor_start = 0; 3259 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3260 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3261 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3262 tty_drv->init_termios = tty_std_termios; 3263 hso_init_termios(&tty_drv->init_termios); 3264 tty_set_operations(tty_drv, &hso_serial_ops); 3265 3266 /* register the tty driver */ 3267 result = tty_register_driver(tty_drv); 3268 if (result) { 3269 pr_err("%s - tty_register_driver failed(%d)\n", 3270 __func__, result); 3271 goto err_free_tty; 3272 } 3273 3274 /* register this module as an usb driver */ 3275 result = usb_register(&hso_driver); 3276 if (result) { 3277 pr_err("Could not register hso driver - error: %d\n", result); 3278 goto err_unreg_tty; 3279 } 3280 3281 /* done */ 3282 return 0; 3283 err_unreg_tty: 3284 tty_unregister_driver(tty_drv); 3285 err_free_tty: 3286 put_tty_driver(tty_drv); 3287 return result; 3288 } 3289 3290 static void __exit hso_exit(void) 3291 { 3292 pr_info("unloaded\n"); 3293 3294 tty_unregister_driver(tty_drv); 3295 /* deregister the usb driver */ 3296 usb_deregister(&hso_driver); 3297 put_tty_driver(tty_drv); 3298 } 3299 3300 /* Module definitions */ 3301 module_init(hso_init); 3302 module_exit(hso_exit); 3303 3304 MODULE_AUTHOR(MOD_AUTHOR); 3305 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3306 MODULE_LICENSE("GPL"); 3307 3308 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3309 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3310 module_param(debug, int, 0644); 3311 3312 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3313 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3314 module_param(tty_major, int, 0644); 3315 3316 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3317 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3318 module_param(disable_net, int, 0644); 3319