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