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