1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Driver for Option High Speed Mobile Devices. 5 * 6 * Copyright (C) 2008 Option International 7 * Filip Aben <f.aben@option.com> 8 * Denis Joseph Barrow <d.barow@option.com> 9 * Jan Dumon <j.dumon@option.com> 10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 11 * <ajb@spheresystems.co.uk> 12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 13 * Copyright (C) 2008 Novell, Inc. 14 * 15 *****************************************************************************/ 16 17 /****************************************************************************** 18 * 19 * Description of the device: 20 * 21 * Interface 0: Contains the IP network interface on the bulk end points. 22 * The multiplexed serial ports are using the interrupt and 23 * control endpoints. 24 * Interrupt contains a bitmap telling which multiplexed 25 * serialport needs servicing. 26 * 27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 28 * port is opened, as this have a huge impact on the network port 29 * throughput. 30 * 31 * Interface 2: Standard modem interface - circuit switched interface, this 32 * can be used to make a standard ppp connection however it 33 * should not be used in conjunction with the IP network interface 34 * enabled for USB performance reasons i.e. if using this set 35 * ideally disable_net=1. 36 * 37 *****************************************************************************/ 38 39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 40 41 #include <linux/sched/signal.h> 42 #include <linux/slab.h> 43 #include <linux/init.h> 44 #include <linux/delay.h> 45 #include <linux/netdevice.h> 46 #include <linux/module.h> 47 #include <linux/ethtool.h> 48 #include <linux/usb.h> 49 #include <linux/tty.h> 50 #include <linux/tty_driver.h> 51 #include <linux/tty_flip.h> 52 #include <linux/kmod.h> 53 #include <linux/rfkill.h> 54 #include <linux/ip.h> 55 #include <linux/uaccess.h> 56 #include <linux/usb/cdc.h> 57 #include <net/arp.h> 58 #include <asm/byteorder.h> 59 #include <linux/serial_core.h> 60 #include <linux/serial.h> 61 62 63 #define MOD_AUTHOR "Option Wireless" 64 #define MOD_DESCRIPTION "USB High Speed Option driver" 65 66 #define HSO_MAX_NET_DEVICES 10 67 #define HSO__MAX_MTU 2048 68 #define DEFAULT_MTU 1500 69 #define DEFAULT_MRU 1500 70 71 #define CTRL_URB_RX_SIZE 1024 72 #define CTRL_URB_TX_SIZE 64 73 74 #define BULK_URB_RX_SIZE 4096 75 #define BULK_URB_TX_SIZE 8192 76 77 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 78 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 79 #define MUX_BULK_RX_BUF_COUNT 4 80 #define USB_TYPE_OPTION_VENDOR 0x20 81 82 /* These definitions are used with the struct hso_net flags element */ 83 /* - use *_bit operations on it. (bit indices not values.) */ 84 #define HSO_NET_RUNNING 0 85 86 #define HSO_NET_TX_TIMEOUT (HZ*10) 87 88 #define HSO_SERIAL_MAGIC 0x48534f31 89 90 /* Number of ttys to handle */ 91 #define HSO_SERIAL_TTY_MINORS 256 92 93 #define MAX_RX_URBS 2 94 95 /*****************************************************************************/ 96 /* Debugging functions */ 97 /*****************************************************************************/ 98 #define hso_dbg(lvl, fmt, ...) \ 99 do { \ 100 if ((lvl) & debug) \ 101 pr_info("[%d:%s] " fmt, \ 102 __LINE__, __func__, ##__VA_ARGS__); \ 103 } while (0) 104 105 /*****************************************************************************/ 106 /* Enumerators */ 107 /*****************************************************************************/ 108 enum pkt_parse_state { 109 WAIT_IP, 110 WAIT_DATA, 111 WAIT_SYNC 112 }; 113 114 /*****************************************************************************/ 115 /* Structs */ 116 /*****************************************************************************/ 117 118 struct hso_shared_int { 119 struct usb_endpoint_descriptor *intr_endp; 120 void *shared_intr_buf; 121 struct urb *shared_intr_urb; 122 struct usb_device *usb; 123 int use_count; 124 int ref_count; 125 struct mutex shared_int_lock; 126 }; 127 128 struct hso_net { 129 struct hso_device *parent; 130 struct net_device *net; 131 struct rfkill *rfkill; 132 char name[24]; 133 134 struct usb_endpoint_descriptor *in_endp; 135 struct usb_endpoint_descriptor *out_endp; 136 137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 138 struct urb *mux_bulk_tx_urb; 139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 140 void *mux_bulk_tx_buf; 141 142 struct sk_buff *skb_rx_buf; 143 struct sk_buff *skb_tx_buf; 144 145 enum pkt_parse_state rx_parse_state; 146 spinlock_t net_lock; 147 148 unsigned short rx_buf_size; 149 unsigned short rx_buf_missing; 150 struct iphdr rx_ip_hdr; 151 152 unsigned long flags; 153 }; 154 155 enum rx_ctrl_state{ 156 RX_IDLE, 157 RX_SENT, 158 RX_PENDING 159 }; 160 161 #define BM_REQUEST_TYPE (0xa1) 162 #define B_NOTIFICATION (0x20) 163 #define W_VALUE (0x0) 164 #define W_LENGTH (0x2) 165 166 #define B_OVERRUN (0x1<<6) 167 #define B_PARITY (0x1<<5) 168 #define B_FRAMING (0x1<<4) 169 #define B_RING_SIGNAL (0x1<<3) 170 #define B_BREAK (0x1<<2) 171 #define B_TX_CARRIER (0x1<<1) 172 #define B_RX_CARRIER (0x1<<0) 173 174 struct hso_serial_state_notification { 175 u8 bmRequestType; 176 u8 bNotification; 177 u16 wValue; 178 u16 wIndex; 179 u16 wLength; 180 u16 UART_state_bitmap; 181 } __packed; 182 183 struct hso_tiocmget { 184 struct mutex mutex; 185 wait_queue_head_t waitq; 186 int intr_completed; 187 struct usb_endpoint_descriptor *endp; 188 struct urb *urb; 189 struct hso_serial_state_notification *serial_state_notification; 190 u16 prev_UART_state_bitmap; 191 struct uart_icount icount; 192 }; 193 194 195 struct hso_serial { 196 struct hso_device *parent; 197 int magic; 198 u8 minor; 199 200 struct hso_shared_int *shared_int; 201 202 /* rx/tx urb could be either a bulk urb or a control urb depending 203 on which serial port it is used on. */ 204 struct urb *rx_urb[MAX_RX_URBS]; 205 u8 num_rx_urbs; 206 u8 *rx_data[MAX_RX_URBS]; 207 u16 rx_data_length; /* should contain allocated length */ 208 209 struct urb *tx_urb; 210 u8 *tx_data; 211 u8 *tx_buffer; 212 u16 tx_data_length; /* should contain allocated length */ 213 u16 tx_data_count; 214 u16 tx_buffer_count; 215 struct usb_ctrlrequest ctrl_req_tx; 216 struct usb_ctrlrequest ctrl_req_rx; 217 218 struct usb_endpoint_descriptor *in_endp; 219 struct usb_endpoint_descriptor *out_endp; 220 221 enum rx_ctrl_state rx_state; 222 u8 rts_state; 223 u8 dtr_state; 224 unsigned tx_urb_used:1; 225 226 struct tty_port port; 227 /* from usb_serial_port */ 228 spinlock_t serial_lock; 229 230 int (*write_data) (struct hso_serial *serial); 231 struct hso_tiocmget *tiocmget; 232 /* Hacks required to get flow control 233 * working on the serial receive buffers 234 * so as not to drop characters on the floor. 235 */ 236 int curr_rx_urb_idx; 237 u8 rx_urb_filled[MAX_RX_URBS]; 238 struct tasklet_struct unthrottle_tasklet; 239 }; 240 241 struct hso_device { 242 union { 243 struct hso_serial *dev_serial; 244 struct hso_net *dev_net; 245 } port_data; 246 247 u32 port_spec; 248 249 u8 is_active; 250 u8 usb_gone; 251 struct work_struct async_get_intf; 252 struct work_struct async_put_intf; 253 254 struct usb_device *usb; 255 struct usb_interface *interface; 256 257 struct device *dev; 258 struct kref ref; 259 struct mutex mutex; 260 }; 261 262 /* Type of interface */ 263 #define HSO_INTF_MASK 0xFF00 264 #define HSO_INTF_MUX 0x0100 265 #define HSO_INTF_BULK 0x0200 266 267 /* Type of port */ 268 #define HSO_PORT_MASK 0xFF 269 #define HSO_PORT_NO_PORT 0x0 270 #define HSO_PORT_CONTROL 0x1 271 #define HSO_PORT_APP 0x2 272 #define HSO_PORT_GPS 0x3 273 #define HSO_PORT_PCSC 0x4 274 #define HSO_PORT_APP2 0x5 275 #define HSO_PORT_GPS_CONTROL 0x6 276 #define HSO_PORT_MSD 0x7 277 #define HSO_PORT_VOICE 0x8 278 #define HSO_PORT_DIAG2 0x9 279 #define HSO_PORT_DIAG 0x10 280 #define HSO_PORT_MODEM 0x11 281 #define HSO_PORT_NETWORK 0x12 282 283 /* Additional device info */ 284 #define HSO_INFO_MASK 0xFF000000 285 #define HSO_INFO_CRC_BUG 0x01000000 286 287 /*****************************************************************************/ 288 /* Prototypes */ 289 /*****************************************************************************/ 290 /* Serial driver functions */ 291 static int hso_serial_tiocmset(struct tty_struct *tty, 292 unsigned int set, unsigned int clear); 293 static void ctrl_callback(struct urb *urb); 294 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 295 static void hso_kick_transmit(struct hso_serial *serial); 296 /* Helper functions */ 297 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 298 struct usb_device *usb, gfp_t gfp); 299 static void handle_usb_error(int status, const char *function, 300 struct hso_device *hso_dev); 301 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 302 int type, int dir); 303 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 304 static void hso_free_interface(struct usb_interface *intf); 305 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 306 static int hso_stop_serial_device(struct hso_device *hso_dev); 307 static int hso_start_net_device(struct hso_device *hso_dev); 308 static void hso_free_shared_int(struct hso_shared_int *shared_int); 309 static int hso_stop_net_device(struct hso_device *hso_dev); 310 static void hso_serial_ref_free(struct kref *ref); 311 static void hso_std_serial_read_bulk_callback(struct urb *urb); 312 static int hso_mux_serial_read(struct hso_serial *serial); 313 static void async_get_intf(struct work_struct *data); 314 static void async_put_intf(struct work_struct *data); 315 static int hso_put_activity(struct hso_device *hso_dev); 316 static int hso_get_activity(struct hso_device *hso_dev); 317 static void tiocmget_intr_callback(struct urb *urb); 318 /*****************************************************************************/ 319 /* Helping functions */ 320 /*****************************************************************************/ 321 322 /* #define DEBUG */ 323 324 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 325 { 326 return hso_dev->port_data.dev_net; 327 } 328 329 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 330 { 331 return hso_dev->port_data.dev_serial; 332 } 333 334 /* Debugging functions */ 335 #ifdef DEBUG 336 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 337 unsigned int len) 338 { 339 static char name[255]; 340 341 sprintf(name, "hso[%d:%s]", line_count, func_name); 342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 343 } 344 345 #define DUMP(buf_, len_) \ 346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 347 348 #define DUMP1(buf_, len_) \ 349 do { \ 350 if (0x01 & debug) \ 351 DUMP(buf_, len_); \ 352 } while (0) 353 #else 354 #define DUMP(buf_, len_) 355 #define DUMP1(buf_, len_) 356 #endif 357 358 /* module parameters */ 359 static int debug; 360 static int tty_major; 361 static int disable_net; 362 363 /* driver info */ 364 static const char driver_name[] = "hso"; 365 static const char tty_filename[] = "ttyHS"; 366 static const char *version = __FILE__ ": " MOD_AUTHOR; 367 /* the usb driver itself (registered in hso_init) */ 368 static struct usb_driver hso_driver; 369 /* serial structures */ 370 static struct tty_driver *tty_drv; 371 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 372 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 373 static spinlock_t serial_table_lock; 374 375 static const s32 default_port_spec[] = { 376 HSO_INTF_MUX | HSO_PORT_NETWORK, 377 HSO_INTF_BULK | HSO_PORT_DIAG, 378 HSO_INTF_BULK | HSO_PORT_MODEM, 379 0 380 }; 381 382 static const s32 icon321_port_spec[] = { 383 HSO_INTF_MUX | HSO_PORT_NETWORK, 384 HSO_INTF_BULK | HSO_PORT_DIAG2, 385 HSO_INTF_BULK | HSO_PORT_MODEM, 386 HSO_INTF_BULK | HSO_PORT_DIAG, 387 0 388 }; 389 390 #define default_port_device(vendor, product) \ 391 USB_DEVICE(vendor, product), \ 392 .driver_info = (kernel_ulong_t)default_port_spec 393 394 #define icon321_port_device(vendor, product) \ 395 USB_DEVICE(vendor, product), \ 396 .driver_info = (kernel_ulong_t)icon321_port_spec 397 398 /* list of devices we support */ 399 static const struct usb_device_id hso_ids[] = { 400 {default_port_device(0x0af0, 0x6711)}, 401 {default_port_device(0x0af0, 0x6731)}, 402 {default_port_device(0x0af0, 0x6751)}, 403 {default_port_device(0x0af0, 0x6771)}, 404 {default_port_device(0x0af0, 0x6791)}, 405 {default_port_device(0x0af0, 0x6811)}, 406 {default_port_device(0x0af0, 0x6911)}, 407 {default_port_device(0x0af0, 0x6951)}, 408 {default_port_device(0x0af0, 0x6971)}, 409 {default_port_device(0x0af0, 0x7011)}, 410 {default_port_device(0x0af0, 0x7031)}, 411 {default_port_device(0x0af0, 0x7051)}, 412 {default_port_device(0x0af0, 0x7071)}, 413 {default_port_device(0x0af0, 0x7111)}, 414 {default_port_device(0x0af0, 0x7211)}, 415 {default_port_device(0x0af0, 0x7251)}, 416 {default_port_device(0x0af0, 0x7271)}, 417 {default_port_device(0x0af0, 0x7311)}, 418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 428 {USB_DEVICE(0x0af0, 0x7701)}, 429 {USB_DEVICE(0x0af0, 0x7706)}, 430 {USB_DEVICE(0x0af0, 0x7801)}, 431 {USB_DEVICE(0x0af0, 0x7901)}, 432 {USB_DEVICE(0x0af0, 0x7A01)}, 433 {USB_DEVICE(0x0af0, 0x7A05)}, 434 {USB_DEVICE(0x0af0, 0x8200)}, 435 {USB_DEVICE(0x0af0, 0x8201)}, 436 {USB_DEVICE(0x0af0, 0x8300)}, 437 {USB_DEVICE(0x0af0, 0x8302)}, 438 {USB_DEVICE(0x0af0, 0x8304)}, 439 {USB_DEVICE(0x0af0, 0x8400)}, 440 {USB_DEVICE(0x0af0, 0x8600)}, 441 {USB_DEVICE(0x0af0, 0x8800)}, 442 {USB_DEVICE(0x0af0, 0x8900)}, 443 {USB_DEVICE(0x0af0, 0x9000)}, 444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 445 {USB_DEVICE(0x0af0, 0xd035)}, 446 {USB_DEVICE(0x0af0, 0xd055)}, 447 {USB_DEVICE(0x0af0, 0xd155)}, 448 {USB_DEVICE(0x0af0, 0xd255)}, 449 {USB_DEVICE(0x0af0, 0xd057)}, 450 {USB_DEVICE(0x0af0, 0xd157)}, 451 {USB_DEVICE(0x0af0, 0xd257)}, 452 {USB_DEVICE(0x0af0, 0xd357)}, 453 {USB_DEVICE(0x0af0, 0xd058)}, 454 {USB_DEVICE(0x0af0, 0xc100)}, 455 {} 456 }; 457 MODULE_DEVICE_TABLE(usb, hso_ids); 458 459 /* Sysfs attribute */ 460 static ssize_t hso_sysfs_show_porttype(struct device *dev, 461 struct device_attribute *attr, 462 char *buf) 463 { 464 struct hso_device *hso_dev = dev_get_drvdata(dev); 465 char *port_name; 466 467 if (!hso_dev) 468 return 0; 469 470 switch (hso_dev->port_spec & HSO_PORT_MASK) { 471 case HSO_PORT_CONTROL: 472 port_name = "Control"; 473 break; 474 case HSO_PORT_APP: 475 port_name = "Application"; 476 break; 477 case HSO_PORT_APP2: 478 port_name = "Application2"; 479 break; 480 case HSO_PORT_GPS: 481 port_name = "GPS"; 482 break; 483 case HSO_PORT_GPS_CONTROL: 484 port_name = "GPS Control"; 485 break; 486 case HSO_PORT_PCSC: 487 port_name = "PCSC"; 488 break; 489 case HSO_PORT_DIAG: 490 port_name = "Diagnostic"; 491 break; 492 case HSO_PORT_DIAG2: 493 port_name = "Diagnostic2"; 494 break; 495 case HSO_PORT_MODEM: 496 port_name = "Modem"; 497 break; 498 case HSO_PORT_NETWORK: 499 port_name = "Network"; 500 break; 501 default: 502 port_name = "Unknown"; 503 break; 504 } 505 506 return sprintf(buf, "%s\n", port_name); 507 } 508 static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL); 509 510 static struct attribute *hso_serial_dev_attrs[] = { 511 &dev_attr_hsotype.attr, 512 NULL 513 }; 514 515 ATTRIBUTE_GROUPS(hso_serial_dev); 516 517 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 518 { 519 int idx; 520 521 for (idx = 0; idx < serial->num_rx_urbs; idx++) 522 if (serial->rx_urb[idx] == urb) 523 return idx; 524 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 525 return -1; 526 } 527 528 /* converts mux value to a port spec value */ 529 static u32 hso_mux_to_port(int mux) 530 { 531 u32 result; 532 533 switch (mux) { 534 case 0x1: 535 result = HSO_PORT_CONTROL; 536 break; 537 case 0x2: 538 result = HSO_PORT_APP; 539 break; 540 case 0x4: 541 result = HSO_PORT_PCSC; 542 break; 543 case 0x8: 544 result = HSO_PORT_GPS; 545 break; 546 case 0x10: 547 result = HSO_PORT_APP2; 548 break; 549 default: 550 result = HSO_PORT_NO_PORT; 551 } 552 return result; 553 } 554 555 /* converts port spec value to a mux value */ 556 static u32 hso_port_to_mux(int port) 557 { 558 u32 result; 559 560 switch (port & HSO_PORT_MASK) { 561 case HSO_PORT_CONTROL: 562 result = 0x0; 563 break; 564 case HSO_PORT_APP: 565 result = 0x1; 566 break; 567 case HSO_PORT_PCSC: 568 result = 0x2; 569 break; 570 case HSO_PORT_GPS: 571 result = 0x3; 572 break; 573 case HSO_PORT_APP2: 574 result = 0x4; 575 break; 576 default: 577 result = 0x0; 578 } 579 return result; 580 } 581 582 static struct hso_serial *get_serial_by_shared_int_and_type( 583 struct hso_shared_int *shared_int, 584 int mux) 585 { 586 int i, port; 587 588 port = hso_mux_to_port(mux); 589 590 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 591 if (serial_table[i] && 592 (dev2ser(serial_table[i])->shared_int == shared_int) && 593 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 594 return dev2ser(serial_table[i]); 595 } 596 } 597 598 return NULL; 599 } 600 601 static struct hso_serial *get_serial_by_index(unsigned index) 602 { 603 struct hso_serial *serial = NULL; 604 unsigned long flags; 605 606 spin_lock_irqsave(&serial_table_lock, flags); 607 if (serial_table[index]) 608 serial = dev2ser(serial_table[index]); 609 spin_unlock_irqrestore(&serial_table_lock, flags); 610 611 return serial; 612 } 613 614 static int get_free_serial_index(void) 615 { 616 int index; 617 unsigned long flags; 618 619 spin_lock_irqsave(&serial_table_lock, flags); 620 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 621 if (serial_table[index] == NULL) { 622 spin_unlock_irqrestore(&serial_table_lock, flags); 623 return index; 624 } 625 } 626 spin_unlock_irqrestore(&serial_table_lock, flags); 627 628 pr_err("%s: no free serial devices in table\n", __func__); 629 return -1; 630 } 631 632 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 633 { 634 unsigned long flags; 635 636 spin_lock_irqsave(&serial_table_lock, flags); 637 if (serial) 638 serial_table[index] = serial->parent; 639 else 640 serial_table[index] = NULL; 641 spin_unlock_irqrestore(&serial_table_lock, flags); 642 } 643 644 static void handle_usb_error(int status, const char *function, 645 struct hso_device *hso_dev) 646 { 647 char *explanation; 648 649 switch (status) { 650 case -ENODEV: 651 explanation = "no device"; 652 break; 653 case -ENOENT: 654 explanation = "endpoint not enabled"; 655 break; 656 case -EPIPE: 657 explanation = "endpoint stalled"; 658 break; 659 case -ENOSPC: 660 explanation = "not enough bandwidth"; 661 break; 662 case -ESHUTDOWN: 663 explanation = "device disabled"; 664 break; 665 case -EHOSTUNREACH: 666 explanation = "device suspended"; 667 break; 668 case -EINVAL: 669 case -EAGAIN: 670 case -EFBIG: 671 case -EMSGSIZE: 672 explanation = "internal error"; 673 break; 674 case -EILSEQ: 675 case -EPROTO: 676 case -ETIME: 677 case -ETIMEDOUT: 678 explanation = "protocol error"; 679 if (hso_dev) 680 usb_queue_reset_device(hso_dev->interface); 681 break; 682 default: 683 explanation = "unknown status"; 684 break; 685 } 686 687 /* log a meaningful explanation of an USB status */ 688 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 689 function, explanation, status); 690 } 691 692 /* Network interface functions */ 693 694 /* called when net interface is brought up by ifconfig */ 695 static int hso_net_open(struct net_device *net) 696 { 697 struct hso_net *odev = netdev_priv(net); 698 unsigned long flags = 0; 699 700 if (!odev) { 701 dev_err(&net->dev, "No net device !\n"); 702 return -ENODEV; 703 } 704 705 odev->skb_tx_buf = NULL; 706 707 /* setup environment */ 708 spin_lock_irqsave(&odev->net_lock, flags); 709 odev->rx_parse_state = WAIT_IP; 710 odev->rx_buf_size = 0; 711 odev->rx_buf_missing = sizeof(struct iphdr); 712 spin_unlock_irqrestore(&odev->net_lock, flags); 713 714 /* We are up and running. */ 715 set_bit(HSO_NET_RUNNING, &odev->flags); 716 hso_start_net_device(odev->parent); 717 718 /* Tell the kernel we are ready to start receiving from it */ 719 netif_start_queue(net); 720 721 return 0; 722 } 723 724 /* called when interface is brought down by ifconfig */ 725 static int hso_net_close(struct net_device *net) 726 { 727 struct hso_net *odev = netdev_priv(net); 728 729 /* we don't need the queue anymore */ 730 netif_stop_queue(net); 731 /* no longer running */ 732 clear_bit(HSO_NET_RUNNING, &odev->flags); 733 734 hso_stop_net_device(odev->parent); 735 736 /* done */ 737 return 0; 738 } 739 740 /* USB tells is xmit done, we should start the netqueue again */ 741 static void write_bulk_callback(struct urb *urb) 742 { 743 struct hso_net *odev = urb->context; 744 int status = urb->status; 745 746 /* Sanity check */ 747 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 748 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 749 return; 750 } 751 752 /* Do we still have a valid kernel network device? */ 753 if (!netif_device_present(odev->net)) { 754 dev_err(&urb->dev->dev, "%s: net device not present\n", 755 __func__); 756 return; 757 } 758 759 /* log status, but don't act on it, we don't need to resubmit anything 760 * anyhow */ 761 if (status) 762 handle_usb_error(status, __func__, odev->parent); 763 764 hso_put_activity(odev->parent); 765 766 /* Tell the network interface we are ready for another frame */ 767 netif_wake_queue(odev->net); 768 } 769 770 /* called by kernel when we need to transmit a packet */ 771 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 772 struct net_device *net) 773 { 774 struct hso_net *odev = netdev_priv(net); 775 int result; 776 777 /* Tell the kernel, "No more frames 'til we are done with this one." */ 778 netif_stop_queue(net); 779 if (hso_get_activity(odev->parent) == -EAGAIN) { 780 odev->skb_tx_buf = skb; 781 return NETDEV_TX_OK; 782 } 783 784 /* log if asked */ 785 DUMP1(skb->data, skb->len); 786 /* Copy it from kernel memory to OUR memory */ 787 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 788 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 789 790 /* Fill in the URB for shipping it out. */ 791 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 792 odev->parent->usb, 793 usb_sndbulkpipe(odev->parent->usb, 794 odev->out_endp-> 795 bEndpointAddress & 0x7F), 796 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 797 odev); 798 799 /* Deal with the Zero Length packet problem, I hope */ 800 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 801 802 /* Send the URB on its merry way. */ 803 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 804 if (result) { 805 dev_warn(&odev->parent->interface->dev, 806 "failed mux_bulk_tx_urb %d\n", result); 807 net->stats.tx_errors++; 808 netif_start_queue(net); 809 } else { 810 net->stats.tx_packets++; 811 net->stats.tx_bytes += skb->len; 812 } 813 dev_kfree_skb(skb); 814 /* we're done */ 815 return NETDEV_TX_OK; 816 } 817 818 static const struct ethtool_ops ops = { 819 .get_link = ethtool_op_get_link 820 }; 821 822 /* called when a packet did not ack after watchdogtimeout */ 823 static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue) 824 { 825 struct hso_net *odev = netdev_priv(net); 826 827 if (!odev) 828 return; 829 830 /* Tell syslog we are hosed. */ 831 dev_warn(&net->dev, "Tx timed out.\n"); 832 833 /* Tear the waiting frame off the list */ 834 if (odev->mux_bulk_tx_urb && 835 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 836 usb_unlink_urb(odev->mux_bulk_tx_urb); 837 838 /* Update statistics */ 839 net->stats.tx_errors++; 840 } 841 842 /* make a real packet from the received USB buffer */ 843 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 844 unsigned int count, unsigned char is_eop) 845 { 846 unsigned short temp_bytes; 847 unsigned short buffer_offset = 0; 848 unsigned short frame_len; 849 850 /* log if needed */ 851 hso_dbg(0x1, "Rx %d bytes\n", count); 852 DUMP(ip_pkt, min(128, (int)count)); 853 854 while (count) { 855 switch (odev->rx_parse_state) { 856 case WAIT_IP: 857 /* waiting for IP header. */ 858 /* wanted bytes - size of ip header */ 859 temp_bytes = 860 (count < 861 odev->rx_buf_missing) ? count : odev-> 862 rx_buf_missing; 863 864 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 865 odev->rx_buf_size, ip_pkt + buffer_offset, 866 temp_bytes); 867 868 odev->rx_buf_size += temp_bytes; 869 buffer_offset += temp_bytes; 870 odev->rx_buf_missing -= temp_bytes; 871 count -= temp_bytes; 872 873 if (!odev->rx_buf_missing) { 874 /* header is complete allocate an sk_buffer and 875 * continue to WAIT_DATA */ 876 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 877 878 if ((frame_len > DEFAULT_MRU) || 879 (frame_len < sizeof(struct iphdr))) { 880 dev_err(&odev->net->dev, 881 "Invalid frame (%d) length\n", 882 frame_len); 883 odev->rx_parse_state = WAIT_SYNC; 884 continue; 885 } 886 /* Allocate an sk_buff */ 887 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 888 frame_len); 889 if (!odev->skb_rx_buf) { 890 /* We got no receive buffer. */ 891 hso_dbg(0x1, "could not allocate memory\n"); 892 odev->rx_parse_state = WAIT_SYNC; 893 continue; 894 } 895 896 /* Copy what we got so far. make room for iphdr 897 * after tail. */ 898 skb_put_data(odev->skb_rx_buf, 899 (char *)&(odev->rx_ip_hdr), 900 sizeof(struct iphdr)); 901 902 /* ETH_HLEN */ 903 odev->rx_buf_size = sizeof(struct iphdr); 904 905 /* Filip actually use .tot_len */ 906 odev->rx_buf_missing = 907 frame_len - sizeof(struct iphdr); 908 odev->rx_parse_state = WAIT_DATA; 909 } 910 break; 911 912 case WAIT_DATA: 913 temp_bytes = (count < odev->rx_buf_missing) 914 ? count : odev->rx_buf_missing; 915 916 /* Copy the rest of the bytes that are left in the 917 * buffer into the waiting sk_buf. */ 918 /* Make room for temp_bytes after tail. */ 919 skb_put_data(odev->skb_rx_buf, 920 ip_pkt + buffer_offset, 921 temp_bytes); 922 923 odev->rx_buf_missing -= temp_bytes; 924 count -= temp_bytes; 925 buffer_offset += temp_bytes; 926 odev->rx_buf_size += temp_bytes; 927 if (!odev->rx_buf_missing) { 928 /* Packet is complete. Inject into stack. */ 929 /* We have IP packet here */ 930 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 931 skb_reset_mac_header(odev->skb_rx_buf); 932 933 /* Ship it off to the kernel */ 934 netif_rx(odev->skb_rx_buf); 935 /* No longer our buffer. */ 936 odev->skb_rx_buf = NULL; 937 938 /* update out statistics */ 939 odev->net->stats.rx_packets++; 940 941 odev->net->stats.rx_bytes += odev->rx_buf_size; 942 943 odev->rx_buf_size = 0; 944 odev->rx_buf_missing = sizeof(struct iphdr); 945 odev->rx_parse_state = WAIT_IP; 946 } 947 break; 948 949 case WAIT_SYNC: 950 hso_dbg(0x1, " W_S\n"); 951 count = 0; 952 break; 953 default: 954 hso_dbg(0x1, "\n"); 955 count--; 956 break; 957 } 958 } 959 960 /* Recovery mechanism for WAIT_SYNC state. */ 961 if (is_eop) { 962 if (odev->rx_parse_state == WAIT_SYNC) { 963 odev->rx_parse_state = WAIT_IP; 964 odev->rx_buf_size = 0; 965 odev->rx_buf_missing = sizeof(struct iphdr); 966 } 967 } 968 } 969 970 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 971 { 972 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 973 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 974 975 if (((rest == 5) || (rest == 6)) && 976 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 977 crc_check, 4)) { 978 urb->actual_length -= 4; 979 } 980 } 981 982 /* Moving data from usb to kernel (in interrupt state) */ 983 static void read_bulk_callback(struct urb *urb) 984 { 985 struct hso_net *odev = urb->context; 986 struct net_device *net; 987 int result; 988 unsigned long flags; 989 int status = urb->status; 990 991 /* is al ok? (Filip: Who's Al ?) */ 992 if (status) { 993 handle_usb_error(status, __func__, odev->parent); 994 return; 995 } 996 997 /* Sanity check */ 998 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 999 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1000 return; 1001 } 1002 usb_mark_last_busy(urb->dev); 1003 1004 net = odev->net; 1005 1006 if (!netif_device_present(net)) { 1007 /* Somebody killed our network interface... */ 1008 return; 1009 } 1010 1011 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1012 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1013 1014 /* do we even have a packet? */ 1015 if (urb->actual_length) { 1016 /* Handle the IP stream, add header and push it onto network 1017 * stack if the packet is complete. */ 1018 spin_lock_irqsave(&odev->net_lock, flags); 1019 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1020 (urb->transfer_buffer_length > 1021 urb->actual_length) ? 1 : 0); 1022 spin_unlock_irqrestore(&odev->net_lock, flags); 1023 } 1024 1025 /* We are done with this URB, resubmit it. Prep the USB to wait for 1026 * another frame. Reuse same as received. */ 1027 usb_fill_bulk_urb(urb, 1028 odev->parent->usb, 1029 usb_rcvbulkpipe(odev->parent->usb, 1030 odev->in_endp-> 1031 bEndpointAddress & 0x7F), 1032 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1033 read_bulk_callback, odev); 1034 1035 /* Give this to the USB subsystem so it can tell us when more data 1036 * arrives. */ 1037 result = usb_submit_urb(urb, GFP_ATOMIC); 1038 if (result) 1039 dev_warn(&odev->parent->interface->dev, 1040 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1041 result); 1042 } 1043 1044 /* Serial driver functions */ 1045 1046 static void hso_init_termios(struct ktermios *termios) 1047 { 1048 /* 1049 * The default requirements for this device are: 1050 */ 1051 termios->c_iflag &= 1052 ~(IGNBRK /* disable ignore break */ 1053 | BRKINT /* disable break causes interrupt */ 1054 | PARMRK /* disable mark parity errors */ 1055 | ISTRIP /* disable clear high bit of input characters */ 1056 | INLCR /* disable translate NL to CR */ 1057 | IGNCR /* disable ignore CR */ 1058 | ICRNL /* disable translate CR to NL */ 1059 | IXON); /* disable enable XON/XOFF flow control */ 1060 1061 /* disable postprocess output characters */ 1062 termios->c_oflag &= ~OPOST; 1063 1064 termios->c_lflag &= 1065 ~(ECHO /* disable echo input characters */ 1066 | ECHONL /* disable echo new line */ 1067 | ICANON /* disable erase, kill, werase, and rprnt 1068 special characters */ 1069 | ISIG /* disable interrupt, quit, and suspend special 1070 characters */ 1071 | IEXTEN); /* disable non-POSIX special characters */ 1072 1073 termios->c_cflag &= 1074 ~(CSIZE /* no size */ 1075 | PARENB /* disable parity bit */ 1076 | CBAUD /* clear current baud rate */ 1077 | CBAUDEX); /* clear current buad rate */ 1078 1079 termios->c_cflag |= CS8; /* character size 8 bits */ 1080 1081 /* baud rate 115200 */ 1082 tty_termios_encode_baud_rate(termios, 115200, 115200); 1083 } 1084 1085 static void _hso_serial_set_termios(struct tty_struct *tty, 1086 struct ktermios *old) 1087 { 1088 struct hso_serial *serial = tty->driver_data; 1089 1090 if (!serial) { 1091 pr_err("%s: no tty structures", __func__); 1092 return; 1093 } 1094 1095 hso_dbg(0x8, "port %d\n", serial->minor); 1096 1097 /* 1098 * Fix up unsupported bits 1099 */ 1100 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1101 1102 tty->termios.c_cflag &= 1103 ~(CSIZE /* no size */ 1104 | PARENB /* disable parity bit */ 1105 | CBAUD /* clear current baud rate */ 1106 | CBAUDEX); /* clear current buad rate */ 1107 1108 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1109 1110 /* baud rate 115200 */ 1111 tty_encode_baud_rate(tty, 115200, 115200); 1112 } 1113 1114 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1115 { 1116 int result; 1117 /* We are done with this URB, resubmit it. Prep the USB to wait for 1118 * another frame */ 1119 usb_fill_bulk_urb(urb, serial->parent->usb, 1120 usb_rcvbulkpipe(serial->parent->usb, 1121 serial->in_endp-> 1122 bEndpointAddress & 0x7F), 1123 urb->transfer_buffer, serial->rx_data_length, 1124 hso_std_serial_read_bulk_callback, serial); 1125 /* Give this to the USB subsystem so it can tell us when more data 1126 * arrives. */ 1127 result = usb_submit_urb(urb, GFP_ATOMIC); 1128 if (result) { 1129 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1130 __func__, result); 1131 } 1132 } 1133 1134 1135 1136 1137 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1138 { 1139 int count; 1140 struct urb *curr_urb; 1141 1142 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1143 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1144 count = put_rxbuf_data(curr_urb, serial); 1145 if (count == -1) 1146 return; 1147 if (count == 0) { 1148 serial->curr_rx_urb_idx++; 1149 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1150 serial->curr_rx_urb_idx = 0; 1151 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1152 } 1153 } 1154 } 1155 1156 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1157 { 1158 int count = 0; 1159 struct urb *urb; 1160 1161 urb = serial->rx_urb[0]; 1162 if (serial->port.count > 0) { 1163 count = put_rxbuf_data(urb, serial); 1164 if (count == -1) 1165 return; 1166 } 1167 /* Re issue a read as long as we receive data. */ 1168 1169 if (count == 0 && ((urb->actual_length != 0) || 1170 (serial->rx_state == RX_PENDING))) { 1171 serial->rx_state = RX_SENT; 1172 hso_mux_serial_read(serial); 1173 } else 1174 serial->rx_state = RX_IDLE; 1175 } 1176 1177 1178 /* read callback for Diag and CS port */ 1179 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1180 { 1181 struct hso_serial *serial = urb->context; 1182 int status = urb->status; 1183 unsigned long flags; 1184 1185 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1186 1187 /* sanity check */ 1188 if (!serial) { 1189 hso_dbg(0x1, "serial == NULL\n"); 1190 return; 1191 } 1192 if (status) { 1193 handle_usb_error(status, __func__, serial->parent); 1194 return; 1195 } 1196 1197 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1198 DUMP1(urb->transfer_buffer, urb->actual_length); 1199 1200 /* Anyone listening? */ 1201 if (serial->port.count == 0) 1202 return; 1203 1204 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1205 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1206 /* Valid data, handle RX data */ 1207 spin_lock_irqsave(&serial->serial_lock, flags); 1208 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1209 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1210 spin_unlock_irqrestore(&serial->serial_lock, flags); 1211 } 1212 1213 /* 1214 * This needs to be a tasklet otherwise we will 1215 * end up recursively calling this function. 1216 */ 1217 static void hso_unthrottle_tasklet(unsigned long data) 1218 { 1219 struct hso_serial *serial = (struct hso_serial *)data; 1220 unsigned long flags; 1221 1222 spin_lock_irqsave(&serial->serial_lock, flags); 1223 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1224 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1225 else 1226 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1227 spin_unlock_irqrestore(&serial->serial_lock, flags); 1228 } 1229 1230 static void hso_unthrottle(struct tty_struct *tty) 1231 { 1232 struct hso_serial *serial = tty->driver_data; 1233 1234 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1235 } 1236 1237 /* open the requested serial port */ 1238 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1239 { 1240 struct hso_serial *serial = get_serial_by_index(tty->index); 1241 int result; 1242 1243 /* sanity check */ 1244 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1245 WARN_ON(1); 1246 tty->driver_data = NULL; 1247 hso_dbg(0x1, "Failed to open port\n"); 1248 return -ENODEV; 1249 } 1250 1251 mutex_lock(&serial->parent->mutex); 1252 result = usb_autopm_get_interface(serial->parent->interface); 1253 if (result < 0) 1254 goto err_out; 1255 1256 hso_dbg(0x1, "Opening %d\n", serial->minor); 1257 1258 /* setup */ 1259 tty->driver_data = serial; 1260 tty_port_tty_set(&serial->port, tty); 1261 1262 /* check for port already opened, if not set the termios */ 1263 serial->port.count++; 1264 if (serial->port.count == 1) { 1265 serial->rx_state = RX_IDLE; 1266 /* Force default termio settings */ 1267 _hso_serial_set_termios(tty, NULL); 1268 tasklet_init(&serial->unthrottle_tasklet, 1269 hso_unthrottle_tasklet, 1270 (unsigned long)serial); 1271 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1272 if (result) { 1273 hso_stop_serial_device(serial->parent); 1274 serial->port.count--; 1275 } else { 1276 kref_get(&serial->parent->ref); 1277 } 1278 } else { 1279 hso_dbg(0x1, "Port was already open\n"); 1280 } 1281 1282 usb_autopm_put_interface(serial->parent->interface); 1283 1284 /* done */ 1285 if (result) 1286 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1287 err_out: 1288 mutex_unlock(&serial->parent->mutex); 1289 return result; 1290 } 1291 1292 /* close the requested serial port */ 1293 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1294 { 1295 struct hso_serial *serial = tty->driver_data; 1296 u8 usb_gone; 1297 1298 hso_dbg(0x1, "Closing serial port\n"); 1299 1300 /* Open failed, no close cleanup required */ 1301 if (serial == NULL) 1302 return; 1303 1304 mutex_lock(&serial->parent->mutex); 1305 usb_gone = serial->parent->usb_gone; 1306 1307 if (!usb_gone) 1308 usb_autopm_get_interface(serial->parent->interface); 1309 1310 /* reset the rts and dtr */ 1311 /* do the actual close */ 1312 serial->port.count--; 1313 1314 if (serial->port.count <= 0) { 1315 serial->port.count = 0; 1316 tty_port_tty_set(&serial->port, NULL); 1317 if (!usb_gone) 1318 hso_stop_serial_device(serial->parent); 1319 tasklet_kill(&serial->unthrottle_tasklet); 1320 } 1321 1322 if (!usb_gone) 1323 usb_autopm_put_interface(serial->parent->interface); 1324 1325 mutex_unlock(&serial->parent->mutex); 1326 } 1327 1328 /* close the requested serial port */ 1329 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1330 int count) 1331 { 1332 struct hso_serial *serial = tty->driver_data; 1333 int space, tx_bytes; 1334 unsigned long flags; 1335 1336 /* sanity check */ 1337 if (serial == NULL) { 1338 pr_err("%s: serial is NULL\n", __func__); 1339 return -ENODEV; 1340 } 1341 1342 spin_lock_irqsave(&serial->serial_lock, flags); 1343 1344 space = serial->tx_data_length - serial->tx_buffer_count; 1345 tx_bytes = (count < space) ? count : space; 1346 1347 if (!tx_bytes) 1348 goto out; 1349 1350 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1351 serial->tx_buffer_count += tx_bytes; 1352 1353 out: 1354 spin_unlock_irqrestore(&serial->serial_lock, flags); 1355 1356 hso_kick_transmit(serial); 1357 /* done */ 1358 return tx_bytes; 1359 } 1360 1361 /* how much room is there for writing */ 1362 static int hso_serial_write_room(struct tty_struct *tty) 1363 { 1364 struct hso_serial *serial = tty->driver_data; 1365 int room; 1366 unsigned long flags; 1367 1368 spin_lock_irqsave(&serial->serial_lock, flags); 1369 room = serial->tx_data_length - serial->tx_buffer_count; 1370 spin_unlock_irqrestore(&serial->serial_lock, flags); 1371 1372 /* return free room */ 1373 return room; 1374 } 1375 1376 static void hso_serial_cleanup(struct tty_struct *tty) 1377 { 1378 struct hso_serial *serial = tty->driver_data; 1379 1380 if (!serial) 1381 return; 1382 1383 kref_put(&serial->parent->ref, hso_serial_ref_free); 1384 } 1385 1386 /* setup the term */ 1387 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1388 { 1389 struct hso_serial *serial = tty->driver_data; 1390 unsigned long flags; 1391 1392 if (old) 1393 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n", 1394 (unsigned int)tty->termios.c_cflag, 1395 (unsigned int)old->c_cflag); 1396 1397 /* the actual setup */ 1398 spin_lock_irqsave(&serial->serial_lock, flags); 1399 if (serial->port.count) 1400 _hso_serial_set_termios(tty, old); 1401 else 1402 tty->termios = *old; 1403 spin_unlock_irqrestore(&serial->serial_lock, flags); 1404 1405 /* done */ 1406 } 1407 1408 /* how many characters in the buffer */ 1409 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1410 { 1411 struct hso_serial *serial = tty->driver_data; 1412 int chars; 1413 unsigned long flags; 1414 1415 /* sanity check */ 1416 if (serial == NULL) 1417 return 0; 1418 1419 spin_lock_irqsave(&serial->serial_lock, flags); 1420 chars = serial->tx_buffer_count; 1421 spin_unlock_irqrestore(&serial->serial_lock, flags); 1422 1423 return chars; 1424 } 1425 static int tiocmget_submit_urb(struct hso_serial *serial, 1426 struct hso_tiocmget *tiocmget, 1427 struct usb_device *usb) 1428 { 1429 int result; 1430 1431 if (serial->parent->usb_gone) 1432 return -ENODEV; 1433 usb_fill_int_urb(tiocmget->urb, usb, 1434 usb_rcvintpipe(usb, 1435 tiocmget->endp-> 1436 bEndpointAddress & 0x7F), 1437 tiocmget->serial_state_notification, 1438 sizeof(struct hso_serial_state_notification), 1439 tiocmget_intr_callback, serial, 1440 tiocmget->endp->bInterval); 1441 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1442 if (result) { 1443 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1444 result); 1445 } 1446 return result; 1447 1448 } 1449 1450 static void tiocmget_intr_callback(struct urb *urb) 1451 { 1452 struct hso_serial *serial = urb->context; 1453 struct hso_tiocmget *tiocmget; 1454 int status = urb->status; 1455 u16 UART_state_bitmap, prev_UART_state_bitmap; 1456 struct uart_icount *icount; 1457 struct hso_serial_state_notification *serial_state_notification; 1458 struct usb_device *usb; 1459 struct usb_interface *interface; 1460 int if_num; 1461 1462 /* Sanity checks */ 1463 if (!serial) 1464 return; 1465 if (status) { 1466 handle_usb_error(status, __func__, serial->parent); 1467 return; 1468 } 1469 1470 /* tiocmget is only supported on HSO_PORT_MODEM */ 1471 tiocmget = serial->tiocmget; 1472 if (!tiocmget) 1473 return; 1474 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1475 1476 usb = serial->parent->usb; 1477 interface = serial->parent->interface; 1478 1479 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1480 1481 /* wIndex should be the USB interface number of the port to which the 1482 * notification applies, which should always be the Modem port. 1483 */ 1484 serial_state_notification = tiocmget->serial_state_notification; 1485 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1486 serial_state_notification->bNotification != B_NOTIFICATION || 1487 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1488 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1489 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1490 dev_warn(&usb->dev, 1491 "hso received invalid serial state notification\n"); 1492 DUMP(serial_state_notification, 1493 sizeof(struct hso_serial_state_notification)); 1494 } else { 1495 unsigned long flags; 1496 1497 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1498 UART_state_bitmap); 1499 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1500 icount = &tiocmget->icount; 1501 spin_lock_irqsave(&serial->serial_lock, flags); 1502 if ((UART_state_bitmap & B_OVERRUN) != 1503 (prev_UART_state_bitmap & B_OVERRUN)) 1504 icount->parity++; 1505 if ((UART_state_bitmap & B_PARITY) != 1506 (prev_UART_state_bitmap & B_PARITY)) 1507 icount->parity++; 1508 if ((UART_state_bitmap & B_FRAMING) != 1509 (prev_UART_state_bitmap & B_FRAMING)) 1510 icount->frame++; 1511 if ((UART_state_bitmap & B_RING_SIGNAL) && 1512 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1513 icount->rng++; 1514 if ((UART_state_bitmap & B_BREAK) != 1515 (prev_UART_state_bitmap & B_BREAK)) 1516 icount->brk++; 1517 if ((UART_state_bitmap & B_TX_CARRIER) != 1518 (prev_UART_state_bitmap & B_TX_CARRIER)) 1519 icount->dsr++; 1520 if ((UART_state_bitmap & B_RX_CARRIER) != 1521 (prev_UART_state_bitmap & B_RX_CARRIER)) 1522 icount->dcd++; 1523 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1524 spin_unlock_irqrestore(&serial->serial_lock, flags); 1525 tiocmget->intr_completed = 1; 1526 wake_up_interruptible(&tiocmget->waitq); 1527 } 1528 memset(serial_state_notification, 0, 1529 sizeof(struct hso_serial_state_notification)); 1530 tiocmget_submit_urb(serial, 1531 tiocmget, 1532 serial->parent->usb); 1533 } 1534 1535 /* 1536 * next few functions largely stolen from drivers/serial/serial_core.c 1537 */ 1538 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1539 * - mask passed in arg for lines of interest 1540 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1541 * Caller should use TIOCGICOUNT to see which one it was 1542 */ 1543 static int 1544 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1545 { 1546 DECLARE_WAITQUEUE(wait, current); 1547 struct uart_icount cprev, cnow; 1548 struct hso_tiocmget *tiocmget; 1549 int ret; 1550 1551 tiocmget = serial->tiocmget; 1552 if (!tiocmget) 1553 return -ENOENT; 1554 /* 1555 * note the counters on entry 1556 */ 1557 spin_lock_irq(&serial->serial_lock); 1558 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1559 spin_unlock_irq(&serial->serial_lock); 1560 add_wait_queue(&tiocmget->waitq, &wait); 1561 for (;;) { 1562 spin_lock_irq(&serial->serial_lock); 1563 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1564 spin_unlock_irq(&serial->serial_lock); 1565 set_current_state(TASK_INTERRUPTIBLE); 1566 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1567 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1568 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1569 ret = 0; 1570 break; 1571 } 1572 schedule(); 1573 /* see if a signal did it */ 1574 if (signal_pending(current)) { 1575 ret = -ERESTARTSYS; 1576 break; 1577 } 1578 cprev = cnow; 1579 } 1580 __set_current_state(TASK_RUNNING); 1581 remove_wait_queue(&tiocmget->waitq, &wait); 1582 1583 return ret; 1584 } 1585 1586 /* 1587 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1588 * Return: write counters to the user passed counter struct 1589 * NB: both 1->0 and 0->1 transitions are counted except for 1590 * RI where only 0->1 is counted. 1591 */ 1592 static int hso_get_count(struct tty_struct *tty, 1593 struct serial_icounter_struct *icount) 1594 { 1595 struct uart_icount cnow; 1596 struct hso_serial *serial = tty->driver_data; 1597 struct hso_tiocmget *tiocmget = serial->tiocmget; 1598 1599 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1600 1601 if (!tiocmget) 1602 return -ENOENT; 1603 spin_lock_irq(&serial->serial_lock); 1604 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1605 spin_unlock_irq(&serial->serial_lock); 1606 1607 icount->cts = cnow.cts; 1608 icount->dsr = cnow.dsr; 1609 icount->rng = cnow.rng; 1610 icount->dcd = cnow.dcd; 1611 icount->rx = cnow.rx; 1612 icount->tx = cnow.tx; 1613 icount->frame = cnow.frame; 1614 icount->overrun = cnow.overrun; 1615 icount->parity = cnow.parity; 1616 icount->brk = cnow.brk; 1617 icount->buf_overrun = cnow.buf_overrun; 1618 1619 return 0; 1620 } 1621 1622 1623 static int hso_serial_tiocmget(struct tty_struct *tty) 1624 { 1625 int retval; 1626 struct hso_serial *serial = tty->driver_data; 1627 struct hso_tiocmget *tiocmget; 1628 u16 UART_state_bitmap; 1629 1630 /* sanity check */ 1631 if (!serial) { 1632 hso_dbg(0x1, "no tty structures\n"); 1633 return -EINVAL; 1634 } 1635 spin_lock_irq(&serial->serial_lock); 1636 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1637 ((serial->dtr_state) ? TIOCM_DTR : 0); 1638 tiocmget = serial->tiocmget; 1639 if (tiocmget) { 1640 1641 UART_state_bitmap = le16_to_cpu( 1642 tiocmget->prev_UART_state_bitmap); 1643 if (UART_state_bitmap & B_RING_SIGNAL) 1644 retval |= TIOCM_RNG; 1645 if (UART_state_bitmap & B_RX_CARRIER) 1646 retval |= TIOCM_CD; 1647 if (UART_state_bitmap & B_TX_CARRIER) 1648 retval |= TIOCM_DSR; 1649 } 1650 spin_unlock_irq(&serial->serial_lock); 1651 return retval; 1652 } 1653 1654 static int hso_serial_tiocmset(struct tty_struct *tty, 1655 unsigned int set, unsigned int clear) 1656 { 1657 int val = 0; 1658 unsigned long flags; 1659 int if_num; 1660 struct hso_serial *serial = tty->driver_data; 1661 struct usb_interface *interface; 1662 1663 /* sanity check */ 1664 if (!serial) { 1665 hso_dbg(0x1, "no tty structures\n"); 1666 return -EINVAL; 1667 } 1668 1669 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1670 return -EINVAL; 1671 1672 interface = serial->parent->interface; 1673 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1674 1675 spin_lock_irqsave(&serial->serial_lock, flags); 1676 if (set & TIOCM_RTS) 1677 serial->rts_state = 1; 1678 if (set & TIOCM_DTR) 1679 serial->dtr_state = 1; 1680 1681 if (clear & TIOCM_RTS) 1682 serial->rts_state = 0; 1683 if (clear & TIOCM_DTR) 1684 serial->dtr_state = 0; 1685 1686 if (serial->dtr_state) 1687 val |= 0x01; 1688 if (serial->rts_state) 1689 val |= 0x02; 1690 1691 spin_unlock_irqrestore(&serial->serial_lock, flags); 1692 1693 return usb_control_msg(serial->parent->usb, 1694 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1695 0x21, val, if_num, NULL, 0, 1696 USB_CTRL_SET_TIMEOUT); 1697 } 1698 1699 static int hso_serial_ioctl(struct tty_struct *tty, 1700 unsigned int cmd, unsigned long arg) 1701 { 1702 struct hso_serial *serial = tty->driver_data; 1703 int ret = 0; 1704 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1705 1706 if (!serial) 1707 return -ENODEV; 1708 switch (cmd) { 1709 case TIOCMIWAIT: 1710 ret = hso_wait_modem_status(serial, arg); 1711 break; 1712 default: 1713 ret = -ENOIOCTLCMD; 1714 break; 1715 } 1716 return ret; 1717 } 1718 1719 1720 /* starts a transmit */ 1721 static void hso_kick_transmit(struct hso_serial *serial) 1722 { 1723 unsigned long flags; 1724 int res; 1725 1726 spin_lock_irqsave(&serial->serial_lock, flags); 1727 if (!serial->tx_buffer_count) 1728 goto out; 1729 1730 if (serial->tx_urb_used) 1731 goto out; 1732 1733 /* Wakeup USB interface if necessary */ 1734 if (hso_get_activity(serial->parent) == -EAGAIN) 1735 goto out; 1736 1737 /* Switch pointers around to avoid memcpy */ 1738 swap(serial->tx_buffer, serial->tx_data); 1739 serial->tx_data_count = serial->tx_buffer_count; 1740 serial->tx_buffer_count = 0; 1741 1742 /* If serial->tx_data is set, it means we switched buffers */ 1743 if (serial->tx_data && serial->write_data) { 1744 res = serial->write_data(serial); 1745 if (res >= 0) 1746 serial->tx_urb_used = 1; 1747 } 1748 out: 1749 spin_unlock_irqrestore(&serial->serial_lock, flags); 1750 } 1751 1752 /* make a request (for reading and writing data to muxed serial port) */ 1753 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1754 struct urb *ctrl_urb, 1755 struct usb_ctrlrequest *ctrl_req, 1756 u8 *ctrl_urb_data, u32 size) 1757 { 1758 int result; 1759 int pipe; 1760 1761 /* Sanity check */ 1762 if (!serial || !ctrl_urb || !ctrl_req) { 1763 pr_err("%s: Wrong arguments\n", __func__); 1764 return -EINVAL; 1765 } 1766 1767 /* initialize */ 1768 ctrl_req->wValue = 0; 1769 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1770 ctrl_req->wLength = cpu_to_le16(size); 1771 1772 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1773 /* Reading command */ 1774 ctrl_req->bRequestType = USB_DIR_IN | 1775 USB_TYPE_OPTION_VENDOR | 1776 USB_RECIP_INTERFACE; 1777 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1778 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1779 } else { 1780 /* Writing command */ 1781 ctrl_req->bRequestType = USB_DIR_OUT | 1782 USB_TYPE_OPTION_VENDOR | 1783 USB_RECIP_INTERFACE; 1784 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1785 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1786 } 1787 /* syslog */ 1788 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1789 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1790 ctrl_req->bRequestType, ctrl_req->wLength, port); 1791 1792 /* Load ctrl urb */ 1793 ctrl_urb->transfer_flags = 0; 1794 usb_fill_control_urb(ctrl_urb, 1795 serial->parent->usb, 1796 pipe, 1797 (u8 *) ctrl_req, 1798 ctrl_urb_data, size, ctrl_callback, serial); 1799 /* Send it on merry way */ 1800 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1801 if (result) { 1802 dev_err(&ctrl_urb->dev->dev, 1803 "%s failed submit ctrl_urb %d type %d\n", __func__, 1804 result, type); 1805 return result; 1806 } 1807 1808 /* done */ 1809 return size; 1810 } 1811 1812 /* called by intr_callback when read occurs */ 1813 static int hso_mux_serial_read(struct hso_serial *serial) 1814 { 1815 if (!serial) 1816 return -EINVAL; 1817 1818 /* clean data */ 1819 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1820 /* make the request */ 1821 1822 if (serial->num_rx_urbs != 1) { 1823 dev_err(&serial->parent->interface->dev, 1824 "ERROR: mux'd reads with multiple buffers " 1825 "not possible\n"); 1826 return 0; 1827 } 1828 return mux_device_request(serial, 1829 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1830 serial->parent->port_spec & HSO_PORT_MASK, 1831 serial->rx_urb[0], 1832 &serial->ctrl_req_rx, 1833 serial->rx_data[0], serial->rx_data_length); 1834 } 1835 1836 /* used for muxed serial port callback (muxed serial read) */ 1837 static void intr_callback(struct urb *urb) 1838 { 1839 struct hso_shared_int *shared_int = urb->context; 1840 struct hso_serial *serial; 1841 unsigned char *port_req; 1842 int status = urb->status; 1843 unsigned long flags; 1844 int i; 1845 1846 usb_mark_last_busy(urb->dev); 1847 1848 /* sanity check */ 1849 if (!shared_int) 1850 return; 1851 1852 /* status check */ 1853 if (status) { 1854 handle_usb_error(status, __func__, NULL); 1855 return; 1856 } 1857 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1858 1859 /* what request? */ 1860 port_req = urb->transfer_buffer; 1861 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1862 /* loop over all muxed ports to find the one sending this */ 1863 for (i = 0; i < 8; i++) { 1864 /* max 8 channels on MUX */ 1865 if (*port_req & (1 << i)) { 1866 serial = get_serial_by_shared_int_and_type(shared_int, 1867 (1 << i)); 1868 if (serial != NULL) { 1869 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1870 i); 1871 spin_lock_irqsave(&serial->serial_lock, flags); 1872 if (serial->rx_state == RX_IDLE && 1873 serial->port.count > 0) { 1874 /* Setup and send a ctrl req read on 1875 * port i */ 1876 if (!serial->rx_urb_filled[0]) { 1877 serial->rx_state = RX_SENT; 1878 hso_mux_serial_read(serial); 1879 } else 1880 serial->rx_state = RX_PENDING; 1881 } else { 1882 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1883 i); 1884 } 1885 spin_unlock_irqrestore(&serial->serial_lock, 1886 flags); 1887 } 1888 } 1889 } 1890 /* Resubmit interrupt urb */ 1891 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1892 } 1893 1894 /* called for writing to muxed serial port */ 1895 static int hso_mux_serial_write_data(struct hso_serial *serial) 1896 { 1897 if (NULL == serial) 1898 return -EINVAL; 1899 1900 return mux_device_request(serial, 1901 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1902 serial->parent->port_spec & HSO_PORT_MASK, 1903 serial->tx_urb, 1904 &serial->ctrl_req_tx, 1905 serial->tx_data, serial->tx_data_count); 1906 } 1907 1908 /* write callback for Diag and CS port */ 1909 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1910 { 1911 struct hso_serial *serial = urb->context; 1912 int status = urb->status; 1913 unsigned long flags; 1914 1915 /* sanity check */ 1916 if (!serial) { 1917 hso_dbg(0x1, "serial == NULL\n"); 1918 return; 1919 } 1920 1921 spin_lock_irqsave(&serial->serial_lock, flags); 1922 serial->tx_urb_used = 0; 1923 spin_unlock_irqrestore(&serial->serial_lock, flags); 1924 if (status) { 1925 handle_usb_error(status, __func__, serial->parent); 1926 return; 1927 } 1928 hso_put_activity(serial->parent); 1929 tty_port_tty_wakeup(&serial->port); 1930 hso_kick_transmit(serial); 1931 1932 hso_dbg(0x1, "\n"); 1933 } 1934 1935 /* called for writing diag or CS serial port */ 1936 static int hso_std_serial_write_data(struct hso_serial *serial) 1937 { 1938 int count = serial->tx_data_count; 1939 int result; 1940 1941 usb_fill_bulk_urb(serial->tx_urb, 1942 serial->parent->usb, 1943 usb_sndbulkpipe(serial->parent->usb, 1944 serial->out_endp-> 1945 bEndpointAddress & 0x7F), 1946 serial->tx_data, serial->tx_data_count, 1947 hso_std_serial_write_bulk_callback, serial); 1948 1949 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1950 if (result) { 1951 dev_warn(&serial->parent->usb->dev, 1952 "Failed to submit urb - res %d\n", result); 1953 return result; 1954 } 1955 1956 return count; 1957 } 1958 1959 /* callback after read or write on muxed serial port */ 1960 static void ctrl_callback(struct urb *urb) 1961 { 1962 struct hso_serial *serial = urb->context; 1963 struct usb_ctrlrequest *req; 1964 int status = urb->status; 1965 unsigned long flags; 1966 1967 /* sanity check */ 1968 if (!serial) 1969 return; 1970 1971 spin_lock_irqsave(&serial->serial_lock, flags); 1972 serial->tx_urb_used = 0; 1973 spin_unlock_irqrestore(&serial->serial_lock, flags); 1974 if (status) { 1975 handle_usb_error(status, __func__, serial->parent); 1976 return; 1977 } 1978 1979 /* what request? */ 1980 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1981 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1982 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1983 DUMP1(urb->transfer_buffer, urb->actual_length); 1984 1985 if (req->bRequestType == 1986 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1987 /* response to a read command */ 1988 serial->rx_urb_filled[0] = 1; 1989 spin_lock_irqsave(&serial->serial_lock, flags); 1990 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1991 spin_unlock_irqrestore(&serial->serial_lock, flags); 1992 } else { 1993 hso_put_activity(serial->parent); 1994 tty_port_tty_wakeup(&serial->port); 1995 /* response to a write command */ 1996 hso_kick_transmit(serial); 1997 } 1998 } 1999 2000 /* handle RX data for serial port */ 2001 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2002 { 2003 struct tty_struct *tty; 2004 int count; 2005 2006 /* Sanity check */ 2007 if (urb == NULL || serial == NULL) { 2008 hso_dbg(0x1, "serial = NULL\n"); 2009 return -2; 2010 } 2011 2012 tty = tty_port_tty_get(&serial->port); 2013 2014 if (tty && tty_throttled(tty)) { 2015 tty_kref_put(tty); 2016 return -1; 2017 } 2018 2019 /* Push data to tty */ 2020 hso_dbg(0x1, "data to push to tty\n"); 2021 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2022 if (count >= urb->actual_length) { 2023 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2024 urb->actual_length); 2025 tty_flip_buffer_push(&serial->port); 2026 } else { 2027 dev_warn(&serial->parent->usb->dev, 2028 "dropping data, %d bytes lost\n", urb->actual_length); 2029 } 2030 2031 tty_kref_put(tty); 2032 2033 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2034 2035 return 0; 2036 } 2037 2038 2039 /* Base driver functions */ 2040 2041 static void hso_log_port(struct hso_device *hso_dev) 2042 { 2043 char *port_type; 2044 char port_dev[20]; 2045 2046 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2047 case HSO_PORT_CONTROL: 2048 port_type = "Control"; 2049 break; 2050 case HSO_PORT_APP: 2051 port_type = "Application"; 2052 break; 2053 case HSO_PORT_GPS: 2054 port_type = "GPS"; 2055 break; 2056 case HSO_PORT_GPS_CONTROL: 2057 port_type = "GPS control"; 2058 break; 2059 case HSO_PORT_APP2: 2060 port_type = "Application2"; 2061 break; 2062 case HSO_PORT_PCSC: 2063 port_type = "PCSC"; 2064 break; 2065 case HSO_PORT_DIAG: 2066 port_type = "Diagnostic"; 2067 break; 2068 case HSO_PORT_DIAG2: 2069 port_type = "Diagnostic2"; 2070 break; 2071 case HSO_PORT_MODEM: 2072 port_type = "Modem"; 2073 break; 2074 case HSO_PORT_NETWORK: 2075 port_type = "Network"; 2076 break; 2077 default: 2078 port_type = "Unknown"; 2079 break; 2080 } 2081 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2082 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2083 } else 2084 sprintf(port_dev, "/dev/%s%d", tty_filename, 2085 dev2ser(hso_dev)->minor); 2086 2087 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2088 port_type, port_dev); 2089 } 2090 2091 static int hso_start_net_device(struct hso_device *hso_dev) 2092 { 2093 int i, result = 0; 2094 struct hso_net *hso_net = dev2net(hso_dev); 2095 2096 if (!hso_net) 2097 return -ENODEV; 2098 2099 /* send URBs for all read buffers */ 2100 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2101 2102 /* Prep a receive URB */ 2103 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2104 hso_dev->usb, 2105 usb_rcvbulkpipe(hso_dev->usb, 2106 hso_net->in_endp-> 2107 bEndpointAddress & 0x7F), 2108 hso_net->mux_bulk_rx_buf_pool[i], 2109 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2110 hso_net); 2111 2112 /* Put it out there so the device can send us stuff */ 2113 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2114 GFP_NOIO); 2115 if (result) 2116 dev_warn(&hso_dev->usb->dev, 2117 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2118 i, result); 2119 } 2120 2121 return result; 2122 } 2123 2124 static int hso_stop_net_device(struct hso_device *hso_dev) 2125 { 2126 int i; 2127 struct hso_net *hso_net = dev2net(hso_dev); 2128 2129 if (!hso_net) 2130 return -ENODEV; 2131 2132 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2133 if (hso_net->mux_bulk_rx_urb_pool[i]) 2134 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2135 2136 } 2137 if (hso_net->mux_bulk_tx_urb) 2138 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2139 2140 return 0; 2141 } 2142 2143 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2144 { 2145 int i, result = 0; 2146 struct hso_serial *serial = dev2ser(hso_dev); 2147 2148 if (!serial) 2149 return -ENODEV; 2150 2151 /* If it is not the MUX port fill in and submit a bulk urb (already 2152 * allocated in hso_serial_start) */ 2153 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2154 for (i = 0; i < serial->num_rx_urbs; i++) { 2155 usb_fill_bulk_urb(serial->rx_urb[i], 2156 serial->parent->usb, 2157 usb_rcvbulkpipe(serial->parent->usb, 2158 serial->in_endp-> 2159 bEndpointAddress & 2160 0x7F), 2161 serial->rx_data[i], 2162 serial->rx_data_length, 2163 hso_std_serial_read_bulk_callback, 2164 serial); 2165 result = usb_submit_urb(serial->rx_urb[i], flags); 2166 if (result) { 2167 dev_warn(&serial->parent->usb->dev, 2168 "Failed to submit urb - res %d\n", 2169 result); 2170 break; 2171 } 2172 } 2173 } else { 2174 mutex_lock(&serial->shared_int->shared_int_lock); 2175 if (!serial->shared_int->use_count) { 2176 result = 2177 hso_mux_submit_intr_urb(serial->shared_int, 2178 hso_dev->usb, flags); 2179 } 2180 serial->shared_int->use_count++; 2181 mutex_unlock(&serial->shared_int->shared_int_lock); 2182 } 2183 if (serial->tiocmget) 2184 tiocmget_submit_urb(serial, 2185 serial->tiocmget, 2186 serial->parent->usb); 2187 return result; 2188 } 2189 2190 static int hso_stop_serial_device(struct hso_device *hso_dev) 2191 { 2192 int i; 2193 struct hso_serial *serial = dev2ser(hso_dev); 2194 struct hso_tiocmget *tiocmget; 2195 2196 if (!serial) 2197 return -ENODEV; 2198 2199 for (i = 0; i < serial->num_rx_urbs; i++) { 2200 if (serial->rx_urb[i]) { 2201 usb_kill_urb(serial->rx_urb[i]); 2202 serial->rx_urb_filled[i] = 0; 2203 } 2204 } 2205 serial->curr_rx_urb_idx = 0; 2206 2207 if (serial->tx_urb) 2208 usb_kill_urb(serial->tx_urb); 2209 2210 if (serial->shared_int) { 2211 mutex_lock(&serial->shared_int->shared_int_lock); 2212 if (serial->shared_int->use_count && 2213 (--serial->shared_int->use_count == 0)) { 2214 struct urb *urb; 2215 2216 urb = serial->shared_int->shared_intr_urb; 2217 if (urb) 2218 usb_kill_urb(urb); 2219 } 2220 mutex_unlock(&serial->shared_int->shared_int_lock); 2221 } 2222 tiocmget = serial->tiocmget; 2223 if (tiocmget) { 2224 wake_up_interruptible(&tiocmget->waitq); 2225 usb_kill_urb(tiocmget->urb); 2226 } 2227 2228 return 0; 2229 } 2230 2231 static void hso_serial_tty_unregister(struct hso_serial *serial) 2232 { 2233 tty_unregister_device(tty_drv, serial->minor); 2234 } 2235 2236 static void hso_serial_common_free(struct hso_serial *serial) 2237 { 2238 int i; 2239 2240 for (i = 0; i < serial->num_rx_urbs; i++) { 2241 /* unlink and free RX URB */ 2242 usb_free_urb(serial->rx_urb[i]); 2243 /* free the RX buffer */ 2244 kfree(serial->rx_data[i]); 2245 } 2246 2247 /* unlink and free TX URB */ 2248 usb_free_urb(serial->tx_urb); 2249 kfree(serial->tx_buffer); 2250 kfree(serial->tx_data); 2251 tty_port_destroy(&serial->port); 2252 } 2253 2254 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2255 int rx_size, int tx_size) 2256 { 2257 int minor; 2258 int i; 2259 2260 tty_port_init(&serial->port); 2261 2262 minor = get_free_serial_index(); 2263 if (minor < 0) 2264 goto exit; 2265 2266 /* register our minor number */ 2267 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2268 tty_drv, minor, &serial->parent->interface->dev, 2269 serial->parent, hso_serial_dev_groups); 2270 2271 /* fill in specific data for later use */ 2272 serial->minor = minor; 2273 serial->magic = HSO_SERIAL_MAGIC; 2274 spin_lock_init(&serial->serial_lock); 2275 serial->num_rx_urbs = num_urbs; 2276 2277 /* RX, allocate urb and initialize */ 2278 2279 /* prepare our RX buffer */ 2280 serial->rx_data_length = rx_size; 2281 for (i = 0; i < serial->num_rx_urbs; i++) { 2282 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2283 if (!serial->rx_urb[i]) 2284 goto exit; 2285 serial->rx_urb[i]->transfer_buffer = NULL; 2286 serial->rx_urb[i]->transfer_buffer_length = 0; 2287 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2288 GFP_KERNEL); 2289 if (!serial->rx_data[i]) 2290 goto exit; 2291 } 2292 2293 /* TX, allocate urb and initialize */ 2294 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2295 if (!serial->tx_urb) 2296 goto exit; 2297 serial->tx_urb->transfer_buffer = NULL; 2298 serial->tx_urb->transfer_buffer_length = 0; 2299 /* prepare our TX buffer */ 2300 serial->tx_data_count = 0; 2301 serial->tx_buffer_count = 0; 2302 serial->tx_data_length = tx_size; 2303 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2304 if (!serial->tx_data) 2305 goto exit; 2306 2307 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2308 if (!serial->tx_buffer) 2309 goto exit; 2310 2311 return 0; 2312 exit: 2313 hso_serial_tty_unregister(serial); 2314 hso_serial_common_free(serial); 2315 return -1; 2316 } 2317 2318 /* Creates a general hso device */ 2319 static struct hso_device *hso_create_device(struct usb_interface *intf, 2320 int port_spec) 2321 { 2322 struct hso_device *hso_dev; 2323 2324 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2325 if (!hso_dev) 2326 return NULL; 2327 2328 hso_dev->port_spec = port_spec; 2329 hso_dev->usb = interface_to_usbdev(intf); 2330 hso_dev->interface = intf; 2331 kref_init(&hso_dev->ref); 2332 mutex_init(&hso_dev->mutex); 2333 2334 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2335 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2336 2337 return hso_dev; 2338 } 2339 2340 /* Removes a network device in the network device table */ 2341 static int remove_net_device(struct hso_device *hso_dev) 2342 { 2343 int i; 2344 2345 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2346 if (network_table[i] == hso_dev) { 2347 network_table[i] = NULL; 2348 break; 2349 } 2350 } 2351 if (i == HSO_MAX_NET_DEVICES) 2352 return -1; 2353 return 0; 2354 } 2355 2356 /* Frees our network device */ 2357 static void hso_free_net_device(struct hso_device *hso_dev) 2358 { 2359 int i; 2360 struct hso_net *hso_net = dev2net(hso_dev); 2361 2362 if (!hso_net) 2363 return; 2364 2365 remove_net_device(hso_net->parent); 2366 2367 if (hso_net->net) 2368 unregister_netdev(hso_net->net); 2369 2370 /* start freeing */ 2371 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2372 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2373 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2374 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2375 } 2376 usb_free_urb(hso_net->mux_bulk_tx_urb); 2377 kfree(hso_net->mux_bulk_tx_buf); 2378 hso_net->mux_bulk_tx_buf = NULL; 2379 2380 if (hso_net->net) 2381 free_netdev(hso_net->net); 2382 2383 kfree(hso_dev); 2384 } 2385 2386 static const struct net_device_ops hso_netdev_ops = { 2387 .ndo_open = hso_net_open, 2388 .ndo_stop = hso_net_close, 2389 .ndo_start_xmit = hso_net_start_xmit, 2390 .ndo_tx_timeout = hso_net_tx_timeout, 2391 }; 2392 2393 /* initialize the network interface */ 2394 static void hso_net_init(struct net_device *net) 2395 { 2396 struct hso_net *hso_net = netdev_priv(net); 2397 2398 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2399 2400 /* fill in the other fields */ 2401 net->netdev_ops = &hso_netdev_ops; 2402 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2403 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2404 net->type = ARPHRD_NONE; 2405 net->mtu = DEFAULT_MTU - 14; 2406 net->tx_queue_len = 10; 2407 net->ethtool_ops = &ops; 2408 2409 /* and initialize the semaphore */ 2410 spin_lock_init(&hso_net->net_lock); 2411 } 2412 2413 /* Adds a network device in the network device table */ 2414 static int add_net_device(struct hso_device *hso_dev) 2415 { 2416 int i; 2417 2418 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2419 if (network_table[i] == NULL) { 2420 network_table[i] = hso_dev; 2421 break; 2422 } 2423 } 2424 if (i == HSO_MAX_NET_DEVICES) 2425 return -1; 2426 return 0; 2427 } 2428 2429 static int hso_rfkill_set_block(void *data, bool blocked) 2430 { 2431 struct hso_device *hso_dev = data; 2432 int enabled = !blocked; 2433 int rv; 2434 2435 mutex_lock(&hso_dev->mutex); 2436 if (hso_dev->usb_gone) 2437 rv = 0; 2438 else 2439 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2440 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2441 USB_CTRL_SET_TIMEOUT); 2442 mutex_unlock(&hso_dev->mutex); 2443 return rv; 2444 } 2445 2446 static const struct rfkill_ops hso_rfkill_ops = { 2447 .set_block = hso_rfkill_set_block, 2448 }; 2449 2450 /* Creates and sets up everything for rfkill */ 2451 static void hso_create_rfkill(struct hso_device *hso_dev, 2452 struct usb_interface *interface) 2453 { 2454 struct hso_net *hso_net = dev2net(hso_dev); 2455 struct device *dev = &hso_net->net->dev; 2456 static u32 rfkill_counter; 2457 2458 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2459 rfkill_counter++); 2460 2461 hso_net->rfkill = rfkill_alloc(hso_net->name, 2462 &interface_to_usbdev(interface)->dev, 2463 RFKILL_TYPE_WWAN, 2464 &hso_rfkill_ops, hso_dev); 2465 if (!hso_net->rfkill) { 2466 dev_err(dev, "%s - Out of memory\n", __func__); 2467 return; 2468 } 2469 if (rfkill_register(hso_net->rfkill) < 0) { 2470 rfkill_destroy(hso_net->rfkill); 2471 hso_net->rfkill = NULL; 2472 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2473 return; 2474 } 2475 } 2476 2477 static struct device_type hso_type = { 2478 .name = "wwan", 2479 }; 2480 2481 /* Creates our network device */ 2482 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2483 int port_spec) 2484 { 2485 int result, i; 2486 struct net_device *net; 2487 struct hso_net *hso_net; 2488 struct hso_device *hso_dev; 2489 2490 hso_dev = hso_create_device(interface, port_spec); 2491 if (!hso_dev) 2492 return NULL; 2493 2494 /* allocate our network device, then we can put in our private data */ 2495 /* call hso_net_init to do the basic initialization */ 2496 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2497 hso_net_init); 2498 if (!net) { 2499 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2500 goto exit; 2501 } 2502 2503 hso_net = netdev_priv(net); 2504 2505 hso_dev->port_data.dev_net = hso_net; 2506 hso_net->net = net; 2507 hso_net->parent = hso_dev; 2508 2509 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2510 USB_DIR_IN); 2511 if (!hso_net->in_endp) { 2512 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2513 goto exit; 2514 } 2515 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2516 USB_DIR_OUT); 2517 if (!hso_net->out_endp) { 2518 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2519 goto exit; 2520 } 2521 SET_NETDEV_DEV(net, &interface->dev); 2522 SET_NETDEV_DEVTYPE(net, &hso_type); 2523 2524 /* start allocating */ 2525 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2526 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2527 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2528 goto exit; 2529 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2530 GFP_KERNEL); 2531 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2532 goto exit; 2533 } 2534 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2535 if (!hso_net->mux_bulk_tx_urb) 2536 goto exit; 2537 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2538 if (!hso_net->mux_bulk_tx_buf) 2539 goto exit; 2540 2541 add_net_device(hso_dev); 2542 2543 /* registering our net device */ 2544 result = register_netdev(net); 2545 if (result) { 2546 dev_err(&interface->dev, "Failed to register device\n"); 2547 goto exit; 2548 } 2549 2550 hso_log_port(hso_dev); 2551 2552 hso_create_rfkill(hso_dev, interface); 2553 2554 return hso_dev; 2555 exit: 2556 hso_free_net_device(hso_dev); 2557 return NULL; 2558 } 2559 2560 static void hso_free_tiomget(struct hso_serial *serial) 2561 { 2562 struct hso_tiocmget *tiocmget; 2563 if (!serial) 2564 return; 2565 tiocmget = serial->tiocmget; 2566 if (tiocmget) { 2567 usb_free_urb(tiocmget->urb); 2568 tiocmget->urb = NULL; 2569 serial->tiocmget = NULL; 2570 kfree(tiocmget->serial_state_notification); 2571 tiocmget->serial_state_notification = NULL; 2572 kfree(tiocmget); 2573 } 2574 } 2575 2576 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2577 static void hso_free_serial_device(struct hso_device *hso_dev) 2578 { 2579 struct hso_serial *serial = dev2ser(hso_dev); 2580 2581 if (!serial) 2582 return; 2583 2584 hso_serial_common_free(serial); 2585 2586 if (serial->shared_int) { 2587 mutex_lock(&serial->shared_int->shared_int_lock); 2588 if (--serial->shared_int->ref_count == 0) 2589 hso_free_shared_int(serial->shared_int); 2590 else 2591 mutex_unlock(&serial->shared_int->shared_int_lock); 2592 } 2593 hso_free_tiomget(serial); 2594 kfree(serial); 2595 kfree(hso_dev); 2596 } 2597 2598 /* Creates a bulk AT channel */ 2599 static struct hso_device *hso_create_bulk_serial_device( 2600 struct usb_interface *interface, int port) 2601 { 2602 struct hso_device *hso_dev; 2603 struct hso_serial *serial; 2604 int num_urbs; 2605 struct hso_tiocmget *tiocmget; 2606 2607 hso_dev = hso_create_device(interface, port); 2608 if (!hso_dev) 2609 return NULL; 2610 2611 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2612 if (!serial) 2613 goto exit; 2614 2615 serial->parent = hso_dev; 2616 hso_dev->port_data.dev_serial = serial; 2617 2618 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2619 num_urbs = 2; 2620 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2621 GFP_KERNEL); 2622 serial->tiocmget->serial_state_notification 2623 = kzalloc(sizeof(struct hso_serial_state_notification), 2624 GFP_KERNEL); 2625 /* it isn't going to break our heart if serial->tiocmget 2626 * allocation fails don't bother checking this. 2627 */ 2628 if (serial->tiocmget && serial->tiocmget->serial_state_notification) { 2629 tiocmget = serial->tiocmget; 2630 tiocmget->endp = hso_get_ep(interface, 2631 USB_ENDPOINT_XFER_INT, 2632 USB_DIR_IN); 2633 if (!tiocmget->endp) { 2634 dev_err(&interface->dev, "Failed to find INT IN ep\n"); 2635 goto exit; 2636 } 2637 2638 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2639 if (tiocmget->urb) { 2640 mutex_init(&tiocmget->mutex); 2641 init_waitqueue_head(&tiocmget->waitq); 2642 } else 2643 hso_free_tiomget(serial); 2644 } 2645 } 2646 else 2647 num_urbs = 1; 2648 2649 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2650 BULK_URB_TX_SIZE)) 2651 goto exit; 2652 2653 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2654 USB_DIR_IN); 2655 if (!serial->in_endp) { 2656 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2657 goto exit2; 2658 } 2659 2660 if (! 2661 (serial->out_endp = 2662 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2663 dev_err(&interface->dev, "Failed to find BULK OUT ep\n"); 2664 goto exit2; 2665 } 2666 2667 serial->write_data = hso_std_serial_write_data; 2668 2669 /* and record this serial */ 2670 set_serial_by_index(serial->minor, serial); 2671 2672 /* setup the proc dirs and files if needed */ 2673 hso_log_port(hso_dev); 2674 2675 /* done, return it */ 2676 return hso_dev; 2677 2678 exit2: 2679 hso_serial_tty_unregister(serial); 2680 hso_serial_common_free(serial); 2681 exit: 2682 hso_free_tiomget(serial); 2683 kfree(serial); 2684 kfree(hso_dev); 2685 return NULL; 2686 } 2687 2688 /* Creates a multiplexed AT channel */ 2689 static 2690 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2691 int port, 2692 struct hso_shared_int *mux) 2693 { 2694 struct hso_device *hso_dev; 2695 struct hso_serial *serial; 2696 int port_spec; 2697 2698 port_spec = HSO_INTF_MUX; 2699 port_spec &= ~HSO_PORT_MASK; 2700 2701 port_spec |= hso_mux_to_port(port); 2702 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2703 return NULL; 2704 2705 hso_dev = hso_create_device(interface, port_spec); 2706 if (!hso_dev) 2707 return NULL; 2708 2709 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2710 if (!serial) 2711 goto exit; 2712 2713 hso_dev->port_data.dev_serial = serial; 2714 serial->parent = hso_dev; 2715 2716 if (hso_serial_common_create 2717 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2718 goto exit; 2719 2720 serial->tx_data_length--; 2721 serial->write_data = hso_mux_serial_write_data; 2722 2723 serial->shared_int = mux; 2724 mutex_lock(&serial->shared_int->shared_int_lock); 2725 serial->shared_int->ref_count++; 2726 mutex_unlock(&serial->shared_int->shared_int_lock); 2727 2728 /* and record this serial */ 2729 set_serial_by_index(serial->minor, serial); 2730 2731 /* setup the proc dirs and files if needed */ 2732 hso_log_port(hso_dev); 2733 2734 /* done, return it */ 2735 return hso_dev; 2736 2737 exit: 2738 if (serial) { 2739 tty_unregister_device(tty_drv, serial->minor); 2740 kfree(serial); 2741 } 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_table[i]->ref, hso_serial_ref_free); 3115 set_serial_by_index(i, NULL); 3116 } 3117 } 3118 3119 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3120 if (network_table[i] && 3121 (network_table[i]->interface == interface)) { 3122 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3123 /* hso_stop_net_device doesn't stop the net queue since 3124 * traffic needs to start it again when suspended */ 3125 netif_stop_queue(dev2net(network_table[i])->net); 3126 hso_stop_net_device(network_table[i]); 3127 cancel_work_sync(&network_table[i]->async_put_intf); 3128 cancel_work_sync(&network_table[i]->async_get_intf); 3129 if (rfk) { 3130 rfkill_unregister(rfk); 3131 rfkill_destroy(rfk); 3132 } 3133 hso_free_net_device(network_table[i]); 3134 } 3135 } 3136 } 3137 3138 /* Helper functions */ 3139 3140 /* Get the endpoint ! */ 3141 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3142 int type, int dir) 3143 { 3144 int i; 3145 struct usb_host_interface *iface = intf->cur_altsetting; 3146 struct usb_endpoint_descriptor *endp; 3147 3148 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3149 endp = &iface->endpoint[i].desc; 3150 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3151 (usb_endpoint_type(endp) == type)) 3152 return endp; 3153 } 3154 3155 return NULL; 3156 } 3157 3158 /* Get the byte that describes which ports are enabled */ 3159 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3160 { 3161 int i; 3162 struct usb_host_interface *iface = intf->cur_altsetting; 3163 3164 if (iface->extralen == 3) { 3165 *ports = iface->extra[2]; 3166 return 0; 3167 } 3168 3169 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3170 if (iface->endpoint[i].extralen == 3) { 3171 *ports = iface->endpoint[i].extra[2]; 3172 return 0; 3173 } 3174 } 3175 3176 return -1; 3177 } 3178 3179 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3180 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3181 struct usb_device *usb, gfp_t gfp) 3182 { 3183 int result; 3184 3185 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3186 usb_rcvintpipe(usb, 3187 shared_int->intr_endp->bEndpointAddress & 0x7F), 3188 shared_int->shared_intr_buf, 3189 1, 3190 intr_callback, shared_int, 3191 shared_int->intr_endp->bInterval); 3192 3193 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3194 if (result) 3195 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3196 result); 3197 3198 return result; 3199 } 3200 3201 /* operations setup of the serial interface */ 3202 static const struct tty_operations hso_serial_ops = { 3203 .open = hso_serial_open, 3204 .close = hso_serial_close, 3205 .write = hso_serial_write, 3206 .write_room = hso_serial_write_room, 3207 .cleanup = hso_serial_cleanup, 3208 .ioctl = hso_serial_ioctl, 3209 .set_termios = hso_serial_set_termios, 3210 .chars_in_buffer = hso_serial_chars_in_buffer, 3211 .tiocmget = hso_serial_tiocmget, 3212 .tiocmset = hso_serial_tiocmset, 3213 .get_icount = hso_get_count, 3214 .unthrottle = hso_unthrottle 3215 }; 3216 3217 static struct usb_driver hso_driver = { 3218 .name = driver_name, 3219 .probe = hso_probe, 3220 .disconnect = hso_disconnect, 3221 .id_table = hso_ids, 3222 .suspend = hso_suspend, 3223 .resume = hso_resume, 3224 .reset_resume = hso_resume, 3225 .supports_autosuspend = 1, 3226 .disable_hub_initiated_lpm = 1, 3227 }; 3228 3229 static int __init hso_init(void) 3230 { 3231 int i; 3232 int result; 3233 3234 /* put it in the log */ 3235 pr_info("%s\n", version); 3236 3237 /* Initialise the serial table semaphore and table */ 3238 spin_lock_init(&serial_table_lock); 3239 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3240 serial_table[i] = NULL; 3241 3242 /* allocate our driver using the proper amount of supported minors */ 3243 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3244 if (!tty_drv) 3245 return -ENOMEM; 3246 3247 /* fill in all needed values */ 3248 tty_drv->driver_name = driver_name; 3249 tty_drv->name = tty_filename; 3250 3251 /* if major number is provided as parameter, use that one */ 3252 if (tty_major) 3253 tty_drv->major = tty_major; 3254 3255 tty_drv->minor_start = 0; 3256 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3257 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3258 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3259 tty_drv->init_termios = tty_std_termios; 3260 hso_init_termios(&tty_drv->init_termios); 3261 tty_set_operations(tty_drv, &hso_serial_ops); 3262 3263 /* register the tty driver */ 3264 result = tty_register_driver(tty_drv); 3265 if (result) { 3266 pr_err("%s - tty_register_driver failed(%d)\n", 3267 __func__, result); 3268 goto err_free_tty; 3269 } 3270 3271 /* register this module as an usb driver */ 3272 result = usb_register(&hso_driver); 3273 if (result) { 3274 pr_err("Could not register hso driver - error: %d\n", result); 3275 goto err_unreg_tty; 3276 } 3277 3278 /* done */ 3279 return 0; 3280 err_unreg_tty: 3281 tty_unregister_driver(tty_drv); 3282 err_free_tty: 3283 put_tty_driver(tty_drv); 3284 return result; 3285 } 3286 3287 static void __exit hso_exit(void) 3288 { 3289 pr_info("unloaded\n"); 3290 3291 tty_unregister_driver(tty_drv); 3292 /* deregister the usb driver */ 3293 usb_deregister(&hso_driver); 3294 put_tty_driver(tty_drv); 3295 } 3296 3297 /* Module definitions */ 3298 module_init(hso_init); 3299 module_exit(hso_exit); 3300 3301 MODULE_AUTHOR(MOD_AUTHOR); 3302 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3303 MODULE_LICENSE("GPL"); 3304 3305 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3306 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3307 module_param(debug, int, 0644); 3308 3309 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3310 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3311 module_param(tty_major, int, 0644); 3312 3313 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3314 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3315 module_param(disable_net, int, 0644); 3316