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