1 /****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31 /****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 54 55 #include <linux/sched/signal.h> 56 #include <linux/slab.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/netdevice.h> 60 #include <linux/module.h> 61 #include <linux/ethtool.h> 62 #include <linux/usb.h> 63 #include <linux/tty.h> 64 #include <linux/tty_driver.h> 65 #include <linux/tty_flip.h> 66 #include <linux/kmod.h> 67 #include <linux/rfkill.h> 68 #include <linux/ip.h> 69 #include <linux/uaccess.h> 70 #include <linux/usb/cdc.h> 71 #include <net/arp.h> 72 #include <asm/byteorder.h> 73 #include <linux/serial_core.h> 74 #include <linux/serial.h> 75 76 77 #define MOD_AUTHOR "Option Wireless" 78 #define MOD_DESCRIPTION "USB High Speed Option driver" 79 80 #define HSO_MAX_NET_DEVICES 10 81 #define HSO__MAX_MTU 2048 82 #define DEFAULT_MTU 1500 83 #define DEFAULT_MRU 1500 84 85 #define CTRL_URB_RX_SIZE 1024 86 #define CTRL_URB_TX_SIZE 64 87 88 #define BULK_URB_RX_SIZE 4096 89 #define BULK_URB_TX_SIZE 8192 90 91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_RX_BUF_COUNT 4 94 #define USB_TYPE_OPTION_VENDOR 0x20 95 96 /* These definitions are used with the struct hso_net flags element */ 97 /* - use *_bit operations on it. (bit indices not values.) */ 98 #define HSO_NET_RUNNING 0 99 100 #define HSO_NET_TX_TIMEOUT (HZ*10) 101 102 #define HSO_SERIAL_MAGIC 0x48534f31 103 104 /* Number of ttys to handle */ 105 #define HSO_SERIAL_TTY_MINORS 256 106 107 #define MAX_RX_URBS 2 108 109 /*****************************************************************************/ 110 /* Debugging functions */ 111 /*****************************************************************************/ 112 #define hso_dbg(lvl, fmt, ...) \ 113 do { \ 114 if ((lvl) & debug) \ 115 pr_info("[%d:%s] " fmt, \ 116 __LINE__, __func__, ##__VA_ARGS__); \ 117 } while (0) 118 119 /*****************************************************************************/ 120 /* Enumerators */ 121 /*****************************************************************************/ 122 enum pkt_parse_state { 123 WAIT_IP, 124 WAIT_DATA, 125 WAIT_SYNC 126 }; 127 128 /*****************************************************************************/ 129 /* Structs */ 130 /*****************************************************************************/ 131 132 struct hso_shared_int { 133 struct usb_endpoint_descriptor *intr_endp; 134 void *shared_intr_buf; 135 struct urb *shared_intr_urb; 136 struct usb_device *usb; 137 int use_count; 138 int ref_count; 139 struct mutex shared_int_lock; 140 }; 141 142 struct hso_net { 143 struct hso_device *parent; 144 struct net_device *net; 145 struct rfkill *rfkill; 146 char name[24]; 147 148 struct usb_endpoint_descriptor *in_endp; 149 struct usb_endpoint_descriptor *out_endp; 150 151 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 152 struct urb *mux_bulk_tx_urb; 153 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 154 void *mux_bulk_tx_buf; 155 156 struct sk_buff *skb_rx_buf; 157 struct sk_buff *skb_tx_buf; 158 159 enum pkt_parse_state rx_parse_state; 160 spinlock_t net_lock; 161 162 unsigned short rx_buf_size; 163 unsigned short rx_buf_missing; 164 struct iphdr rx_ip_hdr; 165 166 unsigned long flags; 167 }; 168 169 enum rx_ctrl_state{ 170 RX_IDLE, 171 RX_SENT, 172 RX_PENDING 173 }; 174 175 #define BM_REQUEST_TYPE (0xa1) 176 #define B_NOTIFICATION (0x20) 177 #define W_VALUE (0x0) 178 #define W_LENGTH (0x2) 179 180 #define B_OVERRUN (0x1<<6) 181 #define B_PARITY (0x1<<5) 182 #define B_FRAMING (0x1<<4) 183 #define B_RING_SIGNAL (0x1<<3) 184 #define B_BREAK (0x1<<2) 185 #define B_TX_CARRIER (0x1<<1) 186 #define B_RX_CARRIER (0x1<<0) 187 188 struct hso_serial_state_notification { 189 u8 bmRequestType; 190 u8 bNotification; 191 u16 wValue; 192 u16 wIndex; 193 u16 wLength; 194 u16 UART_state_bitmap; 195 } __packed; 196 197 struct hso_tiocmget { 198 struct mutex mutex; 199 wait_queue_head_t waitq; 200 int intr_completed; 201 struct usb_endpoint_descriptor *endp; 202 struct urb *urb; 203 struct hso_serial_state_notification serial_state_notification; 204 u16 prev_UART_state_bitmap; 205 struct uart_icount icount; 206 }; 207 208 209 struct hso_serial { 210 struct hso_device *parent; 211 int magic; 212 u8 minor; 213 214 struct hso_shared_int *shared_int; 215 216 /* rx/tx urb could be either a bulk urb or a control urb depending 217 on which serial port it is used on. */ 218 struct urb *rx_urb[MAX_RX_URBS]; 219 u8 num_rx_urbs; 220 u8 *rx_data[MAX_RX_URBS]; 221 u16 rx_data_length; /* should contain allocated length */ 222 223 struct urb *tx_urb; 224 u8 *tx_data; 225 u8 *tx_buffer; 226 u16 tx_data_length; /* should contain allocated length */ 227 u16 tx_data_count; 228 u16 tx_buffer_count; 229 struct usb_ctrlrequest ctrl_req_tx; 230 struct usb_ctrlrequest ctrl_req_rx; 231 232 struct usb_endpoint_descriptor *in_endp; 233 struct usb_endpoint_descriptor *out_endp; 234 235 enum rx_ctrl_state rx_state; 236 u8 rts_state; 237 u8 dtr_state; 238 unsigned tx_urb_used:1; 239 240 struct tty_port port; 241 /* from usb_serial_port */ 242 spinlock_t serial_lock; 243 244 int (*write_data) (struct hso_serial *serial); 245 struct hso_tiocmget *tiocmget; 246 /* Hacks required to get flow control 247 * working on the serial receive buffers 248 * so as not to drop characters on the floor. 249 */ 250 int curr_rx_urb_idx; 251 u8 rx_urb_filled[MAX_RX_URBS]; 252 struct tasklet_struct unthrottle_tasklet; 253 }; 254 255 struct hso_device { 256 union { 257 struct hso_serial *dev_serial; 258 struct hso_net *dev_net; 259 } port_data; 260 261 u32 port_spec; 262 263 u8 is_active; 264 u8 usb_gone; 265 struct work_struct async_get_intf; 266 struct work_struct async_put_intf; 267 268 struct usb_device *usb; 269 struct usb_interface *interface; 270 271 struct device *dev; 272 struct kref ref; 273 struct mutex mutex; 274 }; 275 276 /* Type of interface */ 277 #define HSO_INTF_MASK 0xFF00 278 #define HSO_INTF_MUX 0x0100 279 #define HSO_INTF_BULK 0x0200 280 281 /* Type of port */ 282 #define HSO_PORT_MASK 0xFF 283 #define HSO_PORT_NO_PORT 0x0 284 #define HSO_PORT_CONTROL 0x1 285 #define HSO_PORT_APP 0x2 286 #define HSO_PORT_GPS 0x3 287 #define HSO_PORT_PCSC 0x4 288 #define HSO_PORT_APP2 0x5 289 #define HSO_PORT_GPS_CONTROL 0x6 290 #define HSO_PORT_MSD 0x7 291 #define HSO_PORT_VOICE 0x8 292 #define HSO_PORT_DIAG2 0x9 293 #define HSO_PORT_DIAG 0x10 294 #define HSO_PORT_MODEM 0x11 295 #define HSO_PORT_NETWORK 0x12 296 297 /* Additional device info */ 298 #define HSO_INFO_MASK 0xFF000000 299 #define HSO_INFO_CRC_BUG 0x01000000 300 301 /*****************************************************************************/ 302 /* Prototypes */ 303 /*****************************************************************************/ 304 /* Serial driver functions */ 305 static int hso_serial_tiocmset(struct tty_struct *tty, 306 unsigned int set, unsigned int clear); 307 static void ctrl_callback(struct urb *urb); 308 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 309 static void hso_kick_transmit(struct hso_serial *serial); 310 /* Helper functions */ 311 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 312 struct usb_device *usb, gfp_t gfp); 313 static void handle_usb_error(int status, const char *function, 314 struct hso_device *hso_dev); 315 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 316 int type, int dir); 317 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 318 static void hso_free_interface(struct usb_interface *intf); 319 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 320 static int hso_stop_serial_device(struct hso_device *hso_dev); 321 static int hso_start_net_device(struct hso_device *hso_dev); 322 static void hso_free_shared_int(struct hso_shared_int *shared_int); 323 static int hso_stop_net_device(struct hso_device *hso_dev); 324 static void hso_serial_ref_free(struct kref *ref); 325 static void hso_std_serial_read_bulk_callback(struct urb *urb); 326 static int hso_mux_serial_read(struct hso_serial *serial); 327 static void async_get_intf(struct work_struct *data); 328 static void async_put_intf(struct work_struct *data); 329 static int hso_put_activity(struct hso_device *hso_dev); 330 static int hso_get_activity(struct hso_device *hso_dev); 331 static void tiocmget_intr_callback(struct urb *urb); 332 /*****************************************************************************/ 333 /* Helping functions */ 334 /*****************************************************************************/ 335 336 /* #define DEBUG */ 337 338 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 339 { 340 return hso_dev->port_data.dev_net; 341 } 342 343 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 344 { 345 return hso_dev->port_data.dev_serial; 346 } 347 348 /* Debugging functions */ 349 #ifdef DEBUG 350 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 351 unsigned int len) 352 { 353 static char name[255]; 354 355 sprintf(name, "hso[%d:%s]", line_count, func_name); 356 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 357 } 358 359 #define DUMP(buf_, len_) \ 360 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 361 362 #define DUMP1(buf_, len_) \ 363 do { \ 364 if (0x01 & debug) \ 365 DUMP(buf_, len_); \ 366 } while (0) 367 #else 368 #define DUMP(buf_, len_) 369 #define DUMP1(buf_, len_) 370 #endif 371 372 /* module parameters */ 373 static int debug; 374 static int tty_major; 375 static int disable_net; 376 377 /* driver info */ 378 static const char driver_name[] = "hso"; 379 static const char tty_filename[] = "ttyHS"; 380 static const char *version = __FILE__ ": " MOD_AUTHOR; 381 /* the usb driver itself (registered in hso_init) */ 382 static struct usb_driver hso_driver; 383 /* serial structures */ 384 static struct tty_driver *tty_drv; 385 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 386 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 387 static spinlock_t serial_table_lock; 388 389 static const s32 default_port_spec[] = { 390 HSO_INTF_MUX | HSO_PORT_NETWORK, 391 HSO_INTF_BULK | HSO_PORT_DIAG, 392 HSO_INTF_BULK | HSO_PORT_MODEM, 393 0 394 }; 395 396 static const s32 icon321_port_spec[] = { 397 HSO_INTF_MUX | HSO_PORT_NETWORK, 398 HSO_INTF_BULK | HSO_PORT_DIAG2, 399 HSO_INTF_BULK | HSO_PORT_MODEM, 400 HSO_INTF_BULK | HSO_PORT_DIAG, 401 0 402 }; 403 404 #define default_port_device(vendor, product) \ 405 USB_DEVICE(vendor, product), \ 406 .driver_info = (kernel_ulong_t)default_port_spec 407 408 #define icon321_port_device(vendor, product) \ 409 USB_DEVICE(vendor, product), \ 410 .driver_info = (kernel_ulong_t)icon321_port_spec 411 412 /* list of devices we support */ 413 static const struct usb_device_id hso_ids[] = { 414 {default_port_device(0x0af0, 0x6711)}, 415 {default_port_device(0x0af0, 0x6731)}, 416 {default_port_device(0x0af0, 0x6751)}, 417 {default_port_device(0x0af0, 0x6771)}, 418 {default_port_device(0x0af0, 0x6791)}, 419 {default_port_device(0x0af0, 0x6811)}, 420 {default_port_device(0x0af0, 0x6911)}, 421 {default_port_device(0x0af0, 0x6951)}, 422 {default_port_device(0x0af0, 0x6971)}, 423 {default_port_device(0x0af0, 0x7011)}, 424 {default_port_device(0x0af0, 0x7031)}, 425 {default_port_device(0x0af0, 0x7051)}, 426 {default_port_device(0x0af0, 0x7071)}, 427 {default_port_device(0x0af0, 0x7111)}, 428 {default_port_device(0x0af0, 0x7211)}, 429 {default_port_device(0x0af0, 0x7251)}, 430 {default_port_device(0x0af0, 0x7271)}, 431 {default_port_device(0x0af0, 0x7311)}, 432 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 433 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 434 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 435 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 436 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 437 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 438 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 439 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 440 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 441 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 442 {USB_DEVICE(0x0af0, 0x7701)}, 443 {USB_DEVICE(0x0af0, 0x7706)}, 444 {USB_DEVICE(0x0af0, 0x7801)}, 445 {USB_DEVICE(0x0af0, 0x7901)}, 446 {USB_DEVICE(0x0af0, 0x7A01)}, 447 {USB_DEVICE(0x0af0, 0x7A05)}, 448 {USB_DEVICE(0x0af0, 0x8200)}, 449 {USB_DEVICE(0x0af0, 0x8201)}, 450 {USB_DEVICE(0x0af0, 0x8300)}, 451 {USB_DEVICE(0x0af0, 0x8302)}, 452 {USB_DEVICE(0x0af0, 0x8304)}, 453 {USB_DEVICE(0x0af0, 0x8400)}, 454 {USB_DEVICE(0x0af0, 0x8600)}, 455 {USB_DEVICE(0x0af0, 0x8800)}, 456 {USB_DEVICE(0x0af0, 0x8900)}, 457 {USB_DEVICE(0x0af0, 0x9000)}, 458 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 459 {USB_DEVICE(0x0af0, 0xd035)}, 460 {USB_DEVICE(0x0af0, 0xd055)}, 461 {USB_DEVICE(0x0af0, 0xd155)}, 462 {USB_DEVICE(0x0af0, 0xd255)}, 463 {USB_DEVICE(0x0af0, 0xd057)}, 464 {USB_DEVICE(0x0af0, 0xd157)}, 465 {USB_DEVICE(0x0af0, 0xd257)}, 466 {USB_DEVICE(0x0af0, 0xd357)}, 467 {USB_DEVICE(0x0af0, 0xd058)}, 468 {USB_DEVICE(0x0af0, 0xc100)}, 469 {} 470 }; 471 MODULE_DEVICE_TABLE(usb, hso_ids); 472 473 /* Sysfs attribute */ 474 static ssize_t hso_sysfs_show_porttype(struct device *dev, 475 struct device_attribute *attr, 476 char *buf) 477 { 478 struct hso_device *hso_dev = dev_get_drvdata(dev); 479 char *port_name; 480 481 if (!hso_dev) 482 return 0; 483 484 switch (hso_dev->port_spec & HSO_PORT_MASK) { 485 case HSO_PORT_CONTROL: 486 port_name = "Control"; 487 break; 488 case HSO_PORT_APP: 489 port_name = "Application"; 490 break; 491 case HSO_PORT_APP2: 492 port_name = "Application2"; 493 break; 494 case HSO_PORT_GPS: 495 port_name = "GPS"; 496 break; 497 case HSO_PORT_GPS_CONTROL: 498 port_name = "GPS Control"; 499 break; 500 case HSO_PORT_PCSC: 501 port_name = "PCSC"; 502 break; 503 case HSO_PORT_DIAG: 504 port_name = "Diagnostic"; 505 break; 506 case HSO_PORT_DIAG2: 507 port_name = "Diagnostic2"; 508 break; 509 case HSO_PORT_MODEM: 510 port_name = "Modem"; 511 break; 512 case HSO_PORT_NETWORK: 513 port_name = "Network"; 514 break; 515 default: 516 port_name = "Unknown"; 517 break; 518 } 519 520 return sprintf(buf, "%s\n", port_name); 521 } 522 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 523 524 static struct attribute *hso_serial_dev_attrs[] = { 525 &dev_attr_hsotype.attr, 526 NULL 527 }; 528 529 ATTRIBUTE_GROUPS(hso_serial_dev); 530 531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 532 { 533 int idx; 534 535 for (idx = 0; idx < serial->num_rx_urbs; idx++) 536 if (serial->rx_urb[idx] == urb) 537 return idx; 538 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 539 return -1; 540 } 541 542 /* converts mux value to a port spec value */ 543 static u32 hso_mux_to_port(int mux) 544 { 545 u32 result; 546 547 switch (mux) { 548 case 0x1: 549 result = HSO_PORT_CONTROL; 550 break; 551 case 0x2: 552 result = HSO_PORT_APP; 553 break; 554 case 0x4: 555 result = HSO_PORT_PCSC; 556 break; 557 case 0x8: 558 result = HSO_PORT_GPS; 559 break; 560 case 0x10: 561 result = HSO_PORT_APP2; 562 break; 563 default: 564 result = HSO_PORT_NO_PORT; 565 } 566 return result; 567 } 568 569 /* converts port spec value to a mux value */ 570 static u32 hso_port_to_mux(int port) 571 { 572 u32 result; 573 574 switch (port & HSO_PORT_MASK) { 575 case HSO_PORT_CONTROL: 576 result = 0x0; 577 break; 578 case HSO_PORT_APP: 579 result = 0x1; 580 break; 581 case HSO_PORT_PCSC: 582 result = 0x2; 583 break; 584 case HSO_PORT_GPS: 585 result = 0x3; 586 break; 587 case HSO_PORT_APP2: 588 result = 0x4; 589 break; 590 default: 591 result = 0x0; 592 } 593 return result; 594 } 595 596 static struct hso_serial *get_serial_by_shared_int_and_type( 597 struct hso_shared_int *shared_int, 598 int mux) 599 { 600 int i, port; 601 602 port = hso_mux_to_port(mux); 603 604 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 605 if (serial_table[i] && 606 (dev2ser(serial_table[i])->shared_int == shared_int) && 607 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 608 return dev2ser(serial_table[i]); 609 } 610 } 611 612 return NULL; 613 } 614 615 static struct hso_serial *get_serial_by_index(unsigned index) 616 { 617 struct hso_serial *serial = NULL; 618 unsigned long flags; 619 620 spin_lock_irqsave(&serial_table_lock, flags); 621 if (serial_table[index]) 622 serial = dev2ser(serial_table[index]); 623 spin_unlock_irqrestore(&serial_table_lock, flags); 624 625 return serial; 626 } 627 628 static int get_free_serial_index(void) 629 { 630 int index; 631 unsigned long flags; 632 633 spin_lock_irqsave(&serial_table_lock, flags); 634 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 635 if (serial_table[index] == NULL) { 636 spin_unlock_irqrestore(&serial_table_lock, flags); 637 return index; 638 } 639 } 640 spin_unlock_irqrestore(&serial_table_lock, flags); 641 642 pr_err("%s: no free serial devices in table\n", __func__); 643 return -1; 644 } 645 646 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 647 { 648 unsigned long flags; 649 650 spin_lock_irqsave(&serial_table_lock, flags); 651 if (serial) 652 serial_table[index] = serial->parent; 653 else 654 serial_table[index] = NULL; 655 spin_unlock_irqrestore(&serial_table_lock, flags); 656 } 657 658 static void handle_usb_error(int status, const char *function, 659 struct hso_device *hso_dev) 660 { 661 char *explanation; 662 663 switch (status) { 664 case -ENODEV: 665 explanation = "no device"; 666 break; 667 case -ENOENT: 668 explanation = "endpoint not enabled"; 669 break; 670 case -EPIPE: 671 explanation = "endpoint stalled"; 672 break; 673 case -ENOSPC: 674 explanation = "not enough bandwidth"; 675 break; 676 case -ESHUTDOWN: 677 explanation = "device disabled"; 678 break; 679 case -EHOSTUNREACH: 680 explanation = "device suspended"; 681 break; 682 case -EINVAL: 683 case -EAGAIN: 684 case -EFBIG: 685 case -EMSGSIZE: 686 explanation = "internal error"; 687 break; 688 case -EILSEQ: 689 case -EPROTO: 690 case -ETIME: 691 case -ETIMEDOUT: 692 explanation = "protocol error"; 693 if (hso_dev) 694 usb_queue_reset_device(hso_dev->interface); 695 break; 696 default: 697 explanation = "unknown status"; 698 break; 699 } 700 701 /* log a meaningful explanation of an USB status */ 702 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 703 function, explanation, status); 704 } 705 706 /* Network interface functions */ 707 708 /* called when net interface is brought up by ifconfig */ 709 static int hso_net_open(struct net_device *net) 710 { 711 struct hso_net *odev = netdev_priv(net); 712 unsigned long flags = 0; 713 714 if (!odev) { 715 dev_err(&net->dev, "No net device !\n"); 716 return -ENODEV; 717 } 718 719 odev->skb_tx_buf = NULL; 720 721 /* setup environment */ 722 spin_lock_irqsave(&odev->net_lock, flags); 723 odev->rx_parse_state = WAIT_IP; 724 odev->rx_buf_size = 0; 725 odev->rx_buf_missing = sizeof(struct iphdr); 726 spin_unlock_irqrestore(&odev->net_lock, flags); 727 728 /* We are up and running. */ 729 set_bit(HSO_NET_RUNNING, &odev->flags); 730 hso_start_net_device(odev->parent); 731 732 /* Tell the kernel we are ready to start receiving from it */ 733 netif_start_queue(net); 734 735 return 0; 736 } 737 738 /* called when interface is brought down by ifconfig */ 739 static int hso_net_close(struct net_device *net) 740 { 741 struct hso_net *odev = netdev_priv(net); 742 743 /* we don't need the queue anymore */ 744 netif_stop_queue(net); 745 /* no longer running */ 746 clear_bit(HSO_NET_RUNNING, &odev->flags); 747 748 hso_stop_net_device(odev->parent); 749 750 /* done */ 751 return 0; 752 } 753 754 /* USB tells is xmit done, we should start the netqueue again */ 755 static void write_bulk_callback(struct urb *urb) 756 { 757 struct hso_net *odev = urb->context; 758 int status = urb->status; 759 760 /* Sanity check */ 761 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 762 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 763 return; 764 } 765 766 /* Do we still have a valid kernel network device? */ 767 if (!netif_device_present(odev->net)) { 768 dev_err(&urb->dev->dev, "%s: net device not present\n", 769 __func__); 770 return; 771 } 772 773 /* log status, but don't act on it, we don't need to resubmit anything 774 * anyhow */ 775 if (status) 776 handle_usb_error(status, __func__, odev->parent); 777 778 hso_put_activity(odev->parent); 779 780 /* Tell the network interface we are ready for another frame */ 781 netif_wake_queue(odev->net); 782 } 783 784 /* called by kernel when we need to transmit a packet */ 785 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 786 struct net_device *net) 787 { 788 struct hso_net *odev = netdev_priv(net); 789 int result; 790 791 /* Tell the kernel, "No more frames 'til we are done with this one." */ 792 netif_stop_queue(net); 793 if (hso_get_activity(odev->parent) == -EAGAIN) { 794 odev->skb_tx_buf = skb; 795 return NETDEV_TX_OK; 796 } 797 798 /* log if asked */ 799 DUMP1(skb->data, skb->len); 800 /* Copy it from kernel memory to OUR memory */ 801 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 802 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 803 804 /* Fill in the URB for shipping it out. */ 805 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 806 odev->parent->usb, 807 usb_sndbulkpipe(odev->parent->usb, 808 odev->out_endp-> 809 bEndpointAddress & 0x7F), 810 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 811 odev); 812 813 /* Deal with the Zero Length packet problem, I hope */ 814 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 815 816 /* Send the URB on its merry way. */ 817 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 818 if (result) { 819 dev_warn(&odev->parent->interface->dev, 820 "failed mux_bulk_tx_urb %d\n", result); 821 net->stats.tx_errors++; 822 netif_start_queue(net); 823 } else { 824 net->stats.tx_packets++; 825 net->stats.tx_bytes += skb->len; 826 } 827 dev_kfree_skb(skb); 828 /* we're done */ 829 return NETDEV_TX_OK; 830 } 831 832 static const struct ethtool_ops ops = { 833 .get_link = ethtool_op_get_link 834 }; 835 836 /* called when a packet did not ack after watchdogtimeout */ 837 static void hso_net_tx_timeout(struct net_device *net) 838 { 839 struct hso_net *odev = netdev_priv(net); 840 841 if (!odev) 842 return; 843 844 /* Tell syslog we are hosed. */ 845 dev_warn(&net->dev, "Tx timed out.\n"); 846 847 /* Tear the waiting frame off the list */ 848 if (odev->mux_bulk_tx_urb && 849 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 850 usb_unlink_urb(odev->mux_bulk_tx_urb); 851 852 /* Update statistics */ 853 net->stats.tx_errors++; 854 } 855 856 /* make a real packet from the received USB buffer */ 857 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 858 unsigned int count, unsigned char is_eop) 859 { 860 unsigned short temp_bytes; 861 unsigned short buffer_offset = 0; 862 unsigned short frame_len; 863 864 /* log if needed */ 865 hso_dbg(0x1, "Rx %d bytes\n", count); 866 DUMP(ip_pkt, min(128, (int)count)); 867 868 while (count) { 869 switch (odev->rx_parse_state) { 870 case WAIT_IP: 871 /* waiting for IP header. */ 872 /* wanted bytes - size of ip header */ 873 temp_bytes = 874 (count < 875 odev->rx_buf_missing) ? count : odev-> 876 rx_buf_missing; 877 878 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 879 odev->rx_buf_size, ip_pkt + buffer_offset, 880 temp_bytes); 881 882 odev->rx_buf_size += temp_bytes; 883 buffer_offset += temp_bytes; 884 odev->rx_buf_missing -= temp_bytes; 885 count -= temp_bytes; 886 887 if (!odev->rx_buf_missing) { 888 /* header is complete allocate an sk_buffer and 889 * continue to WAIT_DATA */ 890 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 891 892 if ((frame_len > DEFAULT_MRU) || 893 (frame_len < sizeof(struct iphdr))) { 894 dev_err(&odev->net->dev, 895 "Invalid frame (%d) length\n", 896 frame_len); 897 odev->rx_parse_state = WAIT_SYNC; 898 continue; 899 } 900 /* Allocate an sk_buff */ 901 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 902 frame_len); 903 if (!odev->skb_rx_buf) { 904 /* We got no receive buffer. */ 905 hso_dbg(0x1, "could not allocate memory\n"); 906 odev->rx_parse_state = WAIT_SYNC; 907 continue; 908 } 909 910 /* Copy what we got so far. make room for iphdr 911 * after tail. */ 912 skb_put_data(odev->skb_rx_buf, 913 (char *)&(odev->rx_ip_hdr), 914 sizeof(struct iphdr)); 915 916 /* ETH_HLEN */ 917 odev->rx_buf_size = sizeof(struct iphdr); 918 919 /* Filip actually use .tot_len */ 920 odev->rx_buf_missing = 921 frame_len - sizeof(struct iphdr); 922 odev->rx_parse_state = WAIT_DATA; 923 } 924 break; 925 926 case WAIT_DATA: 927 temp_bytes = (count < odev->rx_buf_missing) 928 ? count : odev->rx_buf_missing; 929 930 /* Copy the rest of the bytes that are left in the 931 * buffer into the waiting sk_buf. */ 932 /* Make room for temp_bytes after tail. */ 933 skb_put_data(odev->skb_rx_buf, 934 ip_pkt + buffer_offset, 935 temp_bytes); 936 937 odev->rx_buf_missing -= temp_bytes; 938 count -= temp_bytes; 939 buffer_offset += temp_bytes; 940 odev->rx_buf_size += temp_bytes; 941 if (!odev->rx_buf_missing) { 942 /* Packet is complete. Inject into stack. */ 943 /* We have IP packet here */ 944 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 945 skb_reset_mac_header(odev->skb_rx_buf); 946 947 /* Ship it off to the kernel */ 948 netif_rx(odev->skb_rx_buf); 949 /* No longer our buffer. */ 950 odev->skb_rx_buf = NULL; 951 952 /* update out statistics */ 953 odev->net->stats.rx_packets++; 954 955 odev->net->stats.rx_bytes += odev->rx_buf_size; 956 957 odev->rx_buf_size = 0; 958 odev->rx_buf_missing = sizeof(struct iphdr); 959 odev->rx_parse_state = WAIT_IP; 960 } 961 break; 962 963 case WAIT_SYNC: 964 hso_dbg(0x1, " W_S\n"); 965 count = 0; 966 break; 967 default: 968 hso_dbg(0x1, "\n"); 969 count--; 970 break; 971 } 972 } 973 974 /* Recovery mechanism for WAIT_SYNC state. */ 975 if (is_eop) { 976 if (odev->rx_parse_state == WAIT_SYNC) { 977 odev->rx_parse_state = WAIT_IP; 978 odev->rx_buf_size = 0; 979 odev->rx_buf_missing = sizeof(struct iphdr); 980 } 981 } 982 } 983 984 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 985 { 986 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 987 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 988 989 if (((rest == 5) || (rest == 6)) && 990 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 991 crc_check, 4)) { 992 urb->actual_length -= 4; 993 } 994 } 995 996 /* Moving data from usb to kernel (in interrupt state) */ 997 static void read_bulk_callback(struct urb *urb) 998 { 999 struct hso_net *odev = urb->context; 1000 struct net_device *net; 1001 int result; 1002 int status = urb->status; 1003 1004 /* is al ok? (Filip: Who's Al ?) */ 1005 if (status) { 1006 handle_usb_error(status, __func__, odev->parent); 1007 return; 1008 } 1009 1010 /* Sanity check */ 1011 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1012 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1013 return; 1014 } 1015 usb_mark_last_busy(urb->dev); 1016 1017 net = odev->net; 1018 1019 if (!netif_device_present(net)) { 1020 /* Somebody killed our network interface... */ 1021 return; 1022 } 1023 1024 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1025 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1026 1027 /* do we even have a packet? */ 1028 if (urb->actual_length) { 1029 /* Handle the IP stream, add header and push it onto network 1030 * stack if the packet is complete. */ 1031 spin_lock(&odev->net_lock); 1032 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1033 (urb->transfer_buffer_length > 1034 urb->actual_length) ? 1 : 0); 1035 spin_unlock(&odev->net_lock); 1036 } 1037 1038 /* We are done with this URB, resubmit it. Prep the USB to wait for 1039 * another frame. Reuse same as received. */ 1040 usb_fill_bulk_urb(urb, 1041 odev->parent->usb, 1042 usb_rcvbulkpipe(odev->parent->usb, 1043 odev->in_endp-> 1044 bEndpointAddress & 0x7F), 1045 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1046 read_bulk_callback, odev); 1047 1048 /* Give this to the USB subsystem so it can tell us when more data 1049 * arrives. */ 1050 result = usb_submit_urb(urb, GFP_ATOMIC); 1051 if (result) 1052 dev_warn(&odev->parent->interface->dev, 1053 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1054 result); 1055 } 1056 1057 /* Serial driver functions */ 1058 1059 static void hso_init_termios(struct ktermios *termios) 1060 { 1061 /* 1062 * The default requirements for this device are: 1063 */ 1064 termios->c_iflag &= 1065 ~(IGNBRK /* disable ignore break */ 1066 | BRKINT /* disable break causes interrupt */ 1067 | PARMRK /* disable mark parity errors */ 1068 | ISTRIP /* disable clear high bit of input characters */ 1069 | INLCR /* disable translate NL to CR */ 1070 | IGNCR /* disable ignore CR */ 1071 | ICRNL /* disable translate CR to NL */ 1072 | IXON); /* disable enable XON/XOFF flow control */ 1073 1074 /* disable postprocess output characters */ 1075 termios->c_oflag &= ~OPOST; 1076 1077 termios->c_lflag &= 1078 ~(ECHO /* disable echo input characters */ 1079 | ECHONL /* disable echo new line */ 1080 | ICANON /* disable erase, kill, werase, and rprnt 1081 special characters */ 1082 | ISIG /* disable interrupt, quit, and suspend special 1083 characters */ 1084 | IEXTEN); /* disable non-POSIX special characters */ 1085 1086 termios->c_cflag &= 1087 ~(CSIZE /* no size */ 1088 | PARENB /* disable parity bit */ 1089 | CBAUD /* clear current baud rate */ 1090 | CBAUDEX); /* clear current buad rate */ 1091 1092 termios->c_cflag |= CS8; /* character size 8 bits */ 1093 1094 /* baud rate 115200 */ 1095 tty_termios_encode_baud_rate(termios, 115200, 115200); 1096 } 1097 1098 static void _hso_serial_set_termios(struct tty_struct *tty, 1099 struct ktermios *old) 1100 { 1101 struct hso_serial *serial = tty->driver_data; 1102 1103 if (!serial) { 1104 pr_err("%s: no tty structures", __func__); 1105 return; 1106 } 1107 1108 hso_dbg(0x8, "port %d\n", serial->minor); 1109 1110 /* 1111 * Fix up unsupported bits 1112 */ 1113 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1114 1115 tty->termios.c_cflag &= 1116 ~(CSIZE /* no size */ 1117 | PARENB /* disable parity bit */ 1118 | CBAUD /* clear current baud rate */ 1119 | CBAUDEX); /* clear current buad rate */ 1120 1121 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1122 1123 /* baud rate 115200 */ 1124 tty_encode_baud_rate(tty, 115200, 115200); 1125 } 1126 1127 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1128 { 1129 int result; 1130 /* We are done with this URB, resubmit it. Prep the USB to wait for 1131 * another frame */ 1132 usb_fill_bulk_urb(urb, serial->parent->usb, 1133 usb_rcvbulkpipe(serial->parent->usb, 1134 serial->in_endp-> 1135 bEndpointAddress & 0x7F), 1136 urb->transfer_buffer, serial->rx_data_length, 1137 hso_std_serial_read_bulk_callback, serial); 1138 /* Give this to the USB subsystem so it can tell us when more data 1139 * arrives. */ 1140 result = usb_submit_urb(urb, GFP_ATOMIC); 1141 if (result) { 1142 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1143 __func__, result); 1144 } 1145 } 1146 1147 1148 1149 1150 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1151 { 1152 int count; 1153 struct urb *curr_urb; 1154 1155 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1156 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1157 count = put_rxbuf_data(curr_urb, serial); 1158 if (count == -1) 1159 return; 1160 if (count == 0) { 1161 serial->curr_rx_urb_idx++; 1162 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1163 serial->curr_rx_urb_idx = 0; 1164 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1165 } 1166 } 1167 } 1168 1169 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1170 { 1171 int count = 0; 1172 struct urb *urb; 1173 1174 urb = serial->rx_urb[0]; 1175 if (serial->port.count > 0) { 1176 count = put_rxbuf_data(urb, serial); 1177 if (count == -1) 1178 return; 1179 } 1180 /* Re issue a read as long as we receive data. */ 1181 1182 if (count == 0 && ((urb->actual_length != 0) || 1183 (serial->rx_state == RX_PENDING))) { 1184 serial->rx_state = RX_SENT; 1185 hso_mux_serial_read(serial); 1186 } else 1187 serial->rx_state = RX_IDLE; 1188 } 1189 1190 1191 /* read callback for Diag and CS port */ 1192 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1193 { 1194 struct hso_serial *serial = urb->context; 1195 int status = urb->status; 1196 1197 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1198 1199 /* sanity check */ 1200 if (!serial) { 1201 hso_dbg(0x1, "serial == NULL\n"); 1202 return; 1203 } 1204 if (status) { 1205 handle_usb_error(status, __func__, serial->parent); 1206 return; 1207 } 1208 1209 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1210 DUMP1(urb->transfer_buffer, urb->actual_length); 1211 1212 /* Anyone listening? */ 1213 if (serial->port.count == 0) 1214 return; 1215 1216 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1217 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1218 /* Valid data, handle RX data */ 1219 spin_lock(&serial->serial_lock); 1220 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1221 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1222 spin_unlock(&serial->serial_lock); 1223 } 1224 1225 /* 1226 * This needs to be a tasklet otherwise we will 1227 * end up recursively calling this function. 1228 */ 1229 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1230 { 1231 unsigned long flags; 1232 1233 spin_lock_irqsave(&serial->serial_lock, flags); 1234 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1235 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1236 else 1237 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1238 spin_unlock_irqrestore(&serial->serial_lock, flags); 1239 } 1240 1241 static void hso_unthrottle(struct tty_struct *tty) 1242 { 1243 struct hso_serial *serial = tty->driver_data; 1244 1245 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1246 } 1247 1248 /* open the requested serial port */ 1249 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1250 { 1251 struct hso_serial *serial = get_serial_by_index(tty->index); 1252 int result; 1253 1254 /* sanity check */ 1255 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1256 WARN_ON(1); 1257 tty->driver_data = NULL; 1258 hso_dbg(0x1, "Failed to open port\n"); 1259 return -ENODEV; 1260 } 1261 1262 mutex_lock(&serial->parent->mutex); 1263 result = usb_autopm_get_interface(serial->parent->interface); 1264 if (result < 0) 1265 goto err_out; 1266 1267 hso_dbg(0x1, "Opening %d\n", serial->minor); 1268 1269 /* setup */ 1270 tty->driver_data = serial; 1271 tty_port_tty_set(&serial->port, tty); 1272 1273 /* check for port already opened, if not set the termios */ 1274 serial->port.count++; 1275 if (serial->port.count == 1) { 1276 serial->rx_state = RX_IDLE; 1277 /* Force default termio settings */ 1278 _hso_serial_set_termios(tty, NULL); 1279 tasklet_init(&serial->unthrottle_tasklet, 1280 (void (*)(unsigned long))hso_unthrottle_tasklet, 1281 (unsigned long)serial); 1282 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1283 if (result) { 1284 hso_stop_serial_device(serial->parent); 1285 serial->port.count--; 1286 } else { 1287 kref_get(&serial->parent->ref); 1288 } 1289 } else { 1290 hso_dbg(0x1, "Port was already open\n"); 1291 } 1292 1293 usb_autopm_put_interface(serial->parent->interface); 1294 1295 /* done */ 1296 if (result) 1297 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1298 err_out: 1299 mutex_unlock(&serial->parent->mutex); 1300 return result; 1301 } 1302 1303 /* close the requested serial port */ 1304 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1305 { 1306 struct hso_serial *serial = tty->driver_data; 1307 u8 usb_gone; 1308 1309 hso_dbg(0x1, "Closing serial port\n"); 1310 1311 /* Open failed, no close cleanup required */ 1312 if (serial == NULL) 1313 return; 1314 1315 mutex_lock(&serial->parent->mutex); 1316 usb_gone = serial->parent->usb_gone; 1317 1318 if (!usb_gone) 1319 usb_autopm_get_interface(serial->parent->interface); 1320 1321 /* reset the rts and dtr */ 1322 /* do the actual close */ 1323 serial->port.count--; 1324 1325 if (serial->port.count <= 0) { 1326 serial->port.count = 0; 1327 tty_port_tty_set(&serial->port, NULL); 1328 if (!usb_gone) 1329 hso_stop_serial_device(serial->parent); 1330 tasklet_kill(&serial->unthrottle_tasklet); 1331 } 1332 1333 if (!usb_gone) 1334 usb_autopm_put_interface(serial->parent->interface); 1335 1336 mutex_unlock(&serial->parent->mutex); 1337 } 1338 1339 /* close the requested serial port */ 1340 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1341 int count) 1342 { 1343 struct hso_serial *serial = tty->driver_data; 1344 int space, tx_bytes; 1345 unsigned long flags; 1346 1347 /* sanity check */ 1348 if (serial == NULL) { 1349 pr_err("%s: serial is NULL\n", __func__); 1350 return -ENODEV; 1351 } 1352 1353 spin_lock_irqsave(&serial->serial_lock, flags); 1354 1355 space = serial->tx_data_length - serial->tx_buffer_count; 1356 tx_bytes = (count < space) ? count : space; 1357 1358 if (!tx_bytes) 1359 goto out; 1360 1361 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1362 serial->tx_buffer_count += tx_bytes; 1363 1364 out: 1365 spin_unlock_irqrestore(&serial->serial_lock, flags); 1366 1367 hso_kick_transmit(serial); 1368 /* done */ 1369 return tx_bytes; 1370 } 1371 1372 /* how much room is there for writing */ 1373 static int hso_serial_write_room(struct tty_struct *tty) 1374 { 1375 struct hso_serial *serial = tty->driver_data; 1376 int room; 1377 unsigned long flags; 1378 1379 spin_lock_irqsave(&serial->serial_lock, flags); 1380 room = serial->tx_data_length - serial->tx_buffer_count; 1381 spin_unlock_irqrestore(&serial->serial_lock, flags); 1382 1383 /* return free room */ 1384 return room; 1385 } 1386 1387 static void hso_serial_cleanup(struct tty_struct *tty) 1388 { 1389 struct hso_serial *serial = tty->driver_data; 1390 1391 if (!serial) 1392 return; 1393 1394 kref_put(&serial->parent->ref, hso_serial_ref_free); 1395 } 1396 1397 /* setup the term */ 1398 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1399 { 1400 struct hso_serial *serial = tty->driver_data; 1401 unsigned long flags; 1402 1403 if (old) 1404 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n", 1405 tty->termios.c_cflag, old->c_cflag); 1406 1407 /* the actual setup */ 1408 spin_lock_irqsave(&serial->serial_lock, flags); 1409 if (serial->port.count) 1410 _hso_serial_set_termios(tty, old); 1411 else 1412 tty->termios = *old; 1413 spin_unlock_irqrestore(&serial->serial_lock, flags); 1414 1415 /* done */ 1416 } 1417 1418 /* how many characters in the buffer */ 1419 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1420 { 1421 struct hso_serial *serial = tty->driver_data; 1422 int chars; 1423 unsigned long flags; 1424 1425 /* sanity check */ 1426 if (serial == NULL) 1427 return 0; 1428 1429 spin_lock_irqsave(&serial->serial_lock, flags); 1430 chars = serial->tx_buffer_count; 1431 spin_unlock_irqrestore(&serial->serial_lock, flags); 1432 1433 return chars; 1434 } 1435 static int tiocmget_submit_urb(struct hso_serial *serial, 1436 struct hso_tiocmget *tiocmget, 1437 struct usb_device *usb) 1438 { 1439 int result; 1440 1441 if (serial->parent->usb_gone) 1442 return -ENODEV; 1443 usb_fill_int_urb(tiocmget->urb, usb, 1444 usb_rcvintpipe(usb, 1445 tiocmget->endp-> 1446 bEndpointAddress & 0x7F), 1447 &tiocmget->serial_state_notification, 1448 sizeof(struct hso_serial_state_notification), 1449 tiocmget_intr_callback, serial, 1450 tiocmget->endp->bInterval); 1451 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1452 if (result) { 1453 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1454 result); 1455 } 1456 return result; 1457 1458 } 1459 1460 static void tiocmget_intr_callback(struct urb *urb) 1461 { 1462 struct hso_serial *serial = urb->context; 1463 struct hso_tiocmget *tiocmget; 1464 int status = urb->status; 1465 u16 UART_state_bitmap, prev_UART_state_bitmap; 1466 struct uart_icount *icount; 1467 struct hso_serial_state_notification *serial_state_notification; 1468 struct usb_device *usb; 1469 struct usb_interface *interface; 1470 int if_num; 1471 1472 /* Sanity checks */ 1473 if (!serial) 1474 return; 1475 if (status) { 1476 handle_usb_error(status, __func__, serial->parent); 1477 return; 1478 } 1479 1480 /* tiocmget is only supported on HSO_PORT_MODEM */ 1481 tiocmget = serial->tiocmget; 1482 if (!tiocmget) 1483 return; 1484 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1485 1486 usb = serial->parent->usb; 1487 interface = serial->parent->interface; 1488 1489 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1490 1491 /* wIndex should be the USB interface number of the port to which the 1492 * notification applies, which should always be the Modem port. 1493 */ 1494 serial_state_notification = &tiocmget->serial_state_notification; 1495 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1496 serial_state_notification->bNotification != B_NOTIFICATION || 1497 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1498 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1499 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1500 dev_warn(&usb->dev, 1501 "hso received invalid serial state notification\n"); 1502 DUMP(serial_state_notification, 1503 sizeof(struct hso_serial_state_notification)); 1504 } else { 1505 1506 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1507 UART_state_bitmap); 1508 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1509 icount = &tiocmget->icount; 1510 spin_lock(&serial->serial_lock); 1511 if ((UART_state_bitmap & B_OVERRUN) != 1512 (prev_UART_state_bitmap & B_OVERRUN)) 1513 icount->parity++; 1514 if ((UART_state_bitmap & B_PARITY) != 1515 (prev_UART_state_bitmap & B_PARITY)) 1516 icount->parity++; 1517 if ((UART_state_bitmap & B_FRAMING) != 1518 (prev_UART_state_bitmap & B_FRAMING)) 1519 icount->frame++; 1520 if ((UART_state_bitmap & B_RING_SIGNAL) && 1521 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1522 icount->rng++; 1523 if ((UART_state_bitmap & B_BREAK) != 1524 (prev_UART_state_bitmap & B_BREAK)) 1525 icount->brk++; 1526 if ((UART_state_bitmap & B_TX_CARRIER) != 1527 (prev_UART_state_bitmap & B_TX_CARRIER)) 1528 icount->dsr++; 1529 if ((UART_state_bitmap & B_RX_CARRIER) != 1530 (prev_UART_state_bitmap & B_RX_CARRIER)) 1531 icount->dcd++; 1532 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1533 spin_unlock(&serial->serial_lock); 1534 tiocmget->intr_completed = 1; 1535 wake_up_interruptible(&tiocmget->waitq); 1536 } 1537 memset(serial_state_notification, 0, 1538 sizeof(struct hso_serial_state_notification)); 1539 tiocmget_submit_urb(serial, 1540 tiocmget, 1541 serial->parent->usb); 1542 } 1543 1544 /* 1545 * next few functions largely stolen from drivers/serial/serial_core.c 1546 */ 1547 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1548 * - mask passed in arg for lines of interest 1549 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1550 * Caller should use TIOCGICOUNT to see which one it was 1551 */ 1552 static int 1553 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1554 { 1555 DECLARE_WAITQUEUE(wait, current); 1556 struct uart_icount cprev, cnow; 1557 struct hso_tiocmget *tiocmget; 1558 int ret; 1559 1560 tiocmget = serial->tiocmget; 1561 if (!tiocmget) 1562 return -ENOENT; 1563 /* 1564 * note the counters on entry 1565 */ 1566 spin_lock_irq(&serial->serial_lock); 1567 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1568 spin_unlock_irq(&serial->serial_lock); 1569 add_wait_queue(&tiocmget->waitq, &wait); 1570 for (;;) { 1571 spin_lock_irq(&serial->serial_lock); 1572 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1573 spin_unlock_irq(&serial->serial_lock); 1574 set_current_state(TASK_INTERRUPTIBLE); 1575 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1576 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1577 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1578 ret = 0; 1579 break; 1580 } 1581 schedule(); 1582 /* see if a signal did it */ 1583 if (signal_pending(current)) { 1584 ret = -ERESTARTSYS; 1585 break; 1586 } 1587 cprev = cnow; 1588 } 1589 __set_current_state(TASK_RUNNING); 1590 remove_wait_queue(&tiocmget->waitq, &wait); 1591 1592 return ret; 1593 } 1594 1595 /* 1596 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1597 * Return: write counters to the user passed counter struct 1598 * NB: both 1->0 and 0->1 transitions are counted except for 1599 * RI where only 0->1 is counted. 1600 */ 1601 static int hso_get_count(struct tty_struct *tty, 1602 struct serial_icounter_struct *icount) 1603 { 1604 struct uart_icount cnow; 1605 struct hso_serial *serial = tty->driver_data; 1606 struct hso_tiocmget *tiocmget = serial->tiocmget; 1607 1608 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1609 1610 if (!tiocmget) 1611 return -ENOENT; 1612 spin_lock_irq(&serial->serial_lock); 1613 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1614 spin_unlock_irq(&serial->serial_lock); 1615 1616 icount->cts = cnow.cts; 1617 icount->dsr = cnow.dsr; 1618 icount->rng = cnow.rng; 1619 icount->dcd = cnow.dcd; 1620 icount->rx = cnow.rx; 1621 icount->tx = cnow.tx; 1622 icount->frame = cnow.frame; 1623 icount->overrun = cnow.overrun; 1624 icount->parity = cnow.parity; 1625 icount->brk = cnow.brk; 1626 icount->buf_overrun = cnow.buf_overrun; 1627 1628 return 0; 1629 } 1630 1631 1632 static int hso_serial_tiocmget(struct tty_struct *tty) 1633 { 1634 int retval; 1635 struct hso_serial *serial = tty->driver_data; 1636 struct hso_tiocmget *tiocmget; 1637 u16 UART_state_bitmap; 1638 1639 /* sanity check */ 1640 if (!serial) { 1641 hso_dbg(0x1, "no tty structures\n"); 1642 return -EINVAL; 1643 } 1644 spin_lock_irq(&serial->serial_lock); 1645 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1646 ((serial->dtr_state) ? TIOCM_DTR : 0); 1647 tiocmget = serial->tiocmget; 1648 if (tiocmget) { 1649 1650 UART_state_bitmap = le16_to_cpu( 1651 tiocmget->prev_UART_state_bitmap); 1652 if (UART_state_bitmap & B_RING_SIGNAL) 1653 retval |= TIOCM_RNG; 1654 if (UART_state_bitmap & B_RX_CARRIER) 1655 retval |= TIOCM_CD; 1656 if (UART_state_bitmap & B_TX_CARRIER) 1657 retval |= TIOCM_DSR; 1658 } 1659 spin_unlock_irq(&serial->serial_lock); 1660 return retval; 1661 } 1662 1663 static int hso_serial_tiocmset(struct tty_struct *tty, 1664 unsigned int set, unsigned int clear) 1665 { 1666 int val = 0; 1667 unsigned long flags; 1668 int if_num; 1669 struct hso_serial *serial = tty->driver_data; 1670 struct usb_interface *interface; 1671 1672 /* sanity check */ 1673 if (!serial) { 1674 hso_dbg(0x1, "no tty structures\n"); 1675 return -EINVAL; 1676 } 1677 1678 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1679 return -EINVAL; 1680 1681 interface = serial->parent->interface; 1682 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1683 1684 spin_lock_irqsave(&serial->serial_lock, flags); 1685 if (set & TIOCM_RTS) 1686 serial->rts_state = 1; 1687 if (set & TIOCM_DTR) 1688 serial->dtr_state = 1; 1689 1690 if (clear & TIOCM_RTS) 1691 serial->rts_state = 0; 1692 if (clear & TIOCM_DTR) 1693 serial->dtr_state = 0; 1694 1695 if (serial->dtr_state) 1696 val |= 0x01; 1697 if (serial->rts_state) 1698 val |= 0x02; 1699 1700 spin_unlock_irqrestore(&serial->serial_lock, flags); 1701 1702 return usb_control_msg(serial->parent->usb, 1703 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1704 0x21, val, if_num, NULL, 0, 1705 USB_CTRL_SET_TIMEOUT); 1706 } 1707 1708 static int hso_serial_ioctl(struct tty_struct *tty, 1709 unsigned int cmd, unsigned long arg) 1710 { 1711 struct hso_serial *serial = tty->driver_data; 1712 int ret = 0; 1713 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1714 1715 if (!serial) 1716 return -ENODEV; 1717 switch (cmd) { 1718 case TIOCMIWAIT: 1719 ret = hso_wait_modem_status(serial, arg); 1720 break; 1721 default: 1722 ret = -ENOIOCTLCMD; 1723 break; 1724 } 1725 return ret; 1726 } 1727 1728 1729 /* starts a transmit */ 1730 static void hso_kick_transmit(struct hso_serial *serial) 1731 { 1732 u8 *temp; 1733 unsigned long flags; 1734 int res; 1735 1736 spin_lock_irqsave(&serial->serial_lock, flags); 1737 if (!serial->tx_buffer_count) 1738 goto out; 1739 1740 if (serial->tx_urb_used) 1741 goto out; 1742 1743 /* Wakeup USB interface if necessary */ 1744 if (hso_get_activity(serial->parent) == -EAGAIN) 1745 goto out; 1746 1747 /* Switch pointers around to avoid memcpy */ 1748 temp = serial->tx_buffer; 1749 serial->tx_buffer = serial->tx_data; 1750 serial->tx_data = temp; 1751 serial->tx_data_count = serial->tx_buffer_count; 1752 serial->tx_buffer_count = 0; 1753 1754 /* If temp is set, it means we switched buffers */ 1755 if (temp && serial->write_data) { 1756 res = serial->write_data(serial); 1757 if (res >= 0) 1758 serial->tx_urb_used = 1; 1759 } 1760 out: 1761 spin_unlock_irqrestore(&serial->serial_lock, flags); 1762 } 1763 1764 /* make a request (for reading and writing data to muxed serial port) */ 1765 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1766 struct urb *ctrl_urb, 1767 struct usb_ctrlrequest *ctrl_req, 1768 u8 *ctrl_urb_data, u32 size) 1769 { 1770 int result; 1771 int pipe; 1772 1773 /* Sanity check */ 1774 if (!serial || !ctrl_urb || !ctrl_req) { 1775 pr_err("%s: Wrong arguments\n", __func__); 1776 return -EINVAL; 1777 } 1778 1779 /* initialize */ 1780 ctrl_req->wValue = 0; 1781 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1782 ctrl_req->wLength = cpu_to_le16(size); 1783 1784 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1785 /* Reading command */ 1786 ctrl_req->bRequestType = USB_DIR_IN | 1787 USB_TYPE_OPTION_VENDOR | 1788 USB_RECIP_INTERFACE; 1789 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1790 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1791 } else { 1792 /* Writing command */ 1793 ctrl_req->bRequestType = USB_DIR_OUT | 1794 USB_TYPE_OPTION_VENDOR | 1795 USB_RECIP_INTERFACE; 1796 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1797 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1798 } 1799 /* syslog */ 1800 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1801 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1802 ctrl_req->bRequestType, ctrl_req->wLength, port); 1803 1804 /* Load ctrl urb */ 1805 ctrl_urb->transfer_flags = 0; 1806 usb_fill_control_urb(ctrl_urb, 1807 serial->parent->usb, 1808 pipe, 1809 (u8 *) ctrl_req, 1810 ctrl_urb_data, size, ctrl_callback, serial); 1811 /* Send it on merry way */ 1812 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1813 if (result) { 1814 dev_err(&ctrl_urb->dev->dev, 1815 "%s failed submit ctrl_urb %d type %d\n", __func__, 1816 result, type); 1817 return result; 1818 } 1819 1820 /* done */ 1821 return size; 1822 } 1823 1824 /* called by intr_callback when read occurs */ 1825 static int hso_mux_serial_read(struct hso_serial *serial) 1826 { 1827 if (!serial) 1828 return -EINVAL; 1829 1830 /* clean data */ 1831 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1832 /* make the request */ 1833 1834 if (serial->num_rx_urbs != 1) { 1835 dev_err(&serial->parent->interface->dev, 1836 "ERROR: mux'd reads with multiple buffers " 1837 "not possible\n"); 1838 return 0; 1839 } 1840 return mux_device_request(serial, 1841 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1842 serial->parent->port_spec & HSO_PORT_MASK, 1843 serial->rx_urb[0], 1844 &serial->ctrl_req_rx, 1845 serial->rx_data[0], serial->rx_data_length); 1846 } 1847 1848 /* used for muxed serial port callback (muxed serial read) */ 1849 static void intr_callback(struct urb *urb) 1850 { 1851 struct hso_shared_int *shared_int = urb->context; 1852 struct hso_serial *serial; 1853 unsigned char *port_req; 1854 int status = urb->status; 1855 int i; 1856 1857 usb_mark_last_busy(urb->dev); 1858 1859 /* sanity check */ 1860 if (!shared_int) 1861 return; 1862 1863 /* status check */ 1864 if (status) { 1865 handle_usb_error(status, __func__, NULL); 1866 return; 1867 } 1868 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1869 1870 /* what request? */ 1871 port_req = urb->transfer_buffer; 1872 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1873 /* loop over all muxed ports to find the one sending this */ 1874 for (i = 0; i < 8; i++) { 1875 /* max 8 channels on MUX */ 1876 if (*port_req & (1 << i)) { 1877 serial = get_serial_by_shared_int_and_type(shared_int, 1878 (1 << i)); 1879 if (serial != NULL) { 1880 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1881 i); 1882 spin_lock(&serial->serial_lock); 1883 if (serial->rx_state == RX_IDLE && 1884 serial->port.count > 0) { 1885 /* Setup and send a ctrl req read on 1886 * port i */ 1887 if (!serial->rx_urb_filled[0]) { 1888 serial->rx_state = RX_SENT; 1889 hso_mux_serial_read(serial); 1890 } else 1891 serial->rx_state = RX_PENDING; 1892 } else { 1893 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1894 i); 1895 } 1896 spin_unlock(&serial->serial_lock); 1897 } 1898 } 1899 } 1900 /* Resubmit interrupt urb */ 1901 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1902 } 1903 1904 /* called for writing to muxed serial port */ 1905 static int hso_mux_serial_write_data(struct hso_serial *serial) 1906 { 1907 if (NULL == serial) 1908 return -EINVAL; 1909 1910 return mux_device_request(serial, 1911 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1912 serial->parent->port_spec & HSO_PORT_MASK, 1913 serial->tx_urb, 1914 &serial->ctrl_req_tx, 1915 serial->tx_data, serial->tx_data_count); 1916 } 1917 1918 /* write callback for Diag and CS port */ 1919 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1920 { 1921 struct hso_serial *serial = urb->context; 1922 int status = urb->status; 1923 1924 /* sanity check */ 1925 if (!serial) { 1926 hso_dbg(0x1, "serial == NULL\n"); 1927 return; 1928 } 1929 1930 spin_lock(&serial->serial_lock); 1931 serial->tx_urb_used = 0; 1932 spin_unlock(&serial->serial_lock); 1933 if (status) { 1934 handle_usb_error(status, __func__, serial->parent); 1935 return; 1936 } 1937 hso_put_activity(serial->parent); 1938 tty_port_tty_wakeup(&serial->port); 1939 hso_kick_transmit(serial); 1940 1941 hso_dbg(0x1, "\n"); 1942 } 1943 1944 /* called for writing diag or CS serial port */ 1945 static int hso_std_serial_write_data(struct hso_serial *serial) 1946 { 1947 int count = serial->tx_data_count; 1948 int result; 1949 1950 usb_fill_bulk_urb(serial->tx_urb, 1951 serial->parent->usb, 1952 usb_sndbulkpipe(serial->parent->usb, 1953 serial->out_endp-> 1954 bEndpointAddress & 0x7F), 1955 serial->tx_data, serial->tx_data_count, 1956 hso_std_serial_write_bulk_callback, serial); 1957 1958 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1959 if (result) { 1960 dev_warn(&serial->parent->usb->dev, 1961 "Failed to submit urb - res %d\n", result); 1962 return result; 1963 } 1964 1965 return count; 1966 } 1967 1968 /* callback after read or write on muxed serial port */ 1969 static void ctrl_callback(struct urb *urb) 1970 { 1971 struct hso_serial *serial = urb->context; 1972 struct usb_ctrlrequest *req; 1973 int status = urb->status; 1974 1975 /* sanity check */ 1976 if (!serial) 1977 return; 1978 1979 spin_lock(&serial->serial_lock); 1980 serial->tx_urb_used = 0; 1981 spin_unlock(&serial->serial_lock); 1982 if (status) { 1983 handle_usb_error(status, __func__, serial->parent); 1984 return; 1985 } 1986 1987 /* what request? */ 1988 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1989 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1990 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1991 DUMP1(urb->transfer_buffer, urb->actual_length); 1992 1993 if (req->bRequestType == 1994 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1995 /* response to a read command */ 1996 serial->rx_urb_filled[0] = 1; 1997 spin_lock(&serial->serial_lock); 1998 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1999 spin_unlock(&serial->serial_lock); 2000 } else { 2001 hso_put_activity(serial->parent); 2002 tty_port_tty_wakeup(&serial->port); 2003 /* response to a write command */ 2004 hso_kick_transmit(serial); 2005 } 2006 } 2007 2008 /* handle RX data for serial port */ 2009 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2010 { 2011 struct tty_struct *tty; 2012 int count; 2013 2014 /* Sanity check */ 2015 if (urb == NULL || serial == NULL) { 2016 hso_dbg(0x1, "serial = NULL\n"); 2017 return -2; 2018 } 2019 2020 tty = tty_port_tty_get(&serial->port); 2021 2022 if (tty && tty_throttled(tty)) { 2023 tty_kref_put(tty); 2024 return -1; 2025 } 2026 2027 /* Push data to tty */ 2028 hso_dbg(0x1, "data to push to tty\n"); 2029 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2030 if (count >= urb->actual_length) { 2031 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2032 urb->actual_length); 2033 tty_flip_buffer_push(&serial->port); 2034 } else { 2035 dev_warn(&serial->parent->usb->dev, 2036 "dropping data, %d bytes lost\n", urb->actual_length); 2037 } 2038 2039 tty_kref_put(tty); 2040 2041 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2042 2043 return 0; 2044 } 2045 2046 2047 /* Base driver functions */ 2048 2049 static void hso_log_port(struct hso_device *hso_dev) 2050 { 2051 char *port_type; 2052 char port_dev[20]; 2053 2054 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2055 case HSO_PORT_CONTROL: 2056 port_type = "Control"; 2057 break; 2058 case HSO_PORT_APP: 2059 port_type = "Application"; 2060 break; 2061 case HSO_PORT_GPS: 2062 port_type = "GPS"; 2063 break; 2064 case HSO_PORT_GPS_CONTROL: 2065 port_type = "GPS control"; 2066 break; 2067 case HSO_PORT_APP2: 2068 port_type = "Application2"; 2069 break; 2070 case HSO_PORT_PCSC: 2071 port_type = "PCSC"; 2072 break; 2073 case HSO_PORT_DIAG: 2074 port_type = "Diagnostic"; 2075 break; 2076 case HSO_PORT_DIAG2: 2077 port_type = "Diagnostic2"; 2078 break; 2079 case HSO_PORT_MODEM: 2080 port_type = "Modem"; 2081 break; 2082 case HSO_PORT_NETWORK: 2083 port_type = "Network"; 2084 break; 2085 default: 2086 port_type = "Unknown"; 2087 break; 2088 } 2089 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2090 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2091 } else 2092 sprintf(port_dev, "/dev/%s%d", tty_filename, 2093 dev2ser(hso_dev)->minor); 2094 2095 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2096 port_type, port_dev); 2097 } 2098 2099 static int hso_start_net_device(struct hso_device *hso_dev) 2100 { 2101 int i, result = 0; 2102 struct hso_net *hso_net = dev2net(hso_dev); 2103 2104 if (!hso_net) 2105 return -ENODEV; 2106 2107 /* send URBs for all read buffers */ 2108 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2109 2110 /* Prep a receive URB */ 2111 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2112 hso_dev->usb, 2113 usb_rcvbulkpipe(hso_dev->usb, 2114 hso_net->in_endp-> 2115 bEndpointAddress & 0x7F), 2116 hso_net->mux_bulk_rx_buf_pool[i], 2117 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2118 hso_net); 2119 2120 /* Put it out there so the device can send us stuff */ 2121 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2122 GFP_NOIO); 2123 if (result) 2124 dev_warn(&hso_dev->usb->dev, 2125 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2126 i, result); 2127 } 2128 2129 return result; 2130 } 2131 2132 static int hso_stop_net_device(struct hso_device *hso_dev) 2133 { 2134 int i; 2135 struct hso_net *hso_net = dev2net(hso_dev); 2136 2137 if (!hso_net) 2138 return -ENODEV; 2139 2140 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2141 if (hso_net->mux_bulk_rx_urb_pool[i]) 2142 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2143 2144 } 2145 if (hso_net->mux_bulk_tx_urb) 2146 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2147 2148 return 0; 2149 } 2150 2151 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2152 { 2153 int i, result = 0; 2154 struct hso_serial *serial = dev2ser(hso_dev); 2155 2156 if (!serial) 2157 return -ENODEV; 2158 2159 /* If it is not the MUX port fill in and submit a bulk urb (already 2160 * allocated in hso_serial_start) */ 2161 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2162 for (i = 0; i < serial->num_rx_urbs; i++) { 2163 usb_fill_bulk_urb(serial->rx_urb[i], 2164 serial->parent->usb, 2165 usb_rcvbulkpipe(serial->parent->usb, 2166 serial->in_endp-> 2167 bEndpointAddress & 2168 0x7F), 2169 serial->rx_data[i], 2170 serial->rx_data_length, 2171 hso_std_serial_read_bulk_callback, 2172 serial); 2173 result = usb_submit_urb(serial->rx_urb[i], flags); 2174 if (result) { 2175 dev_warn(&serial->parent->usb->dev, 2176 "Failed to submit urb - res %d\n", 2177 result); 2178 break; 2179 } 2180 } 2181 } else { 2182 mutex_lock(&serial->shared_int->shared_int_lock); 2183 if (!serial->shared_int->use_count) { 2184 result = 2185 hso_mux_submit_intr_urb(serial->shared_int, 2186 hso_dev->usb, flags); 2187 } 2188 serial->shared_int->use_count++; 2189 mutex_unlock(&serial->shared_int->shared_int_lock); 2190 } 2191 if (serial->tiocmget) 2192 tiocmget_submit_urb(serial, 2193 serial->tiocmget, 2194 serial->parent->usb); 2195 return result; 2196 } 2197 2198 static int hso_stop_serial_device(struct hso_device *hso_dev) 2199 { 2200 int i; 2201 struct hso_serial *serial = dev2ser(hso_dev); 2202 struct hso_tiocmget *tiocmget; 2203 2204 if (!serial) 2205 return -ENODEV; 2206 2207 for (i = 0; i < serial->num_rx_urbs; i++) { 2208 if (serial->rx_urb[i]) { 2209 usb_kill_urb(serial->rx_urb[i]); 2210 serial->rx_urb_filled[i] = 0; 2211 } 2212 } 2213 serial->curr_rx_urb_idx = 0; 2214 2215 if (serial->tx_urb) 2216 usb_kill_urb(serial->tx_urb); 2217 2218 if (serial->shared_int) { 2219 mutex_lock(&serial->shared_int->shared_int_lock); 2220 if (serial->shared_int->use_count && 2221 (--serial->shared_int->use_count == 0)) { 2222 struct urb *urb; 2223 2224 urb = serial->shared_int->shared_intr_urb; 2225 if (urb) 2226 usb_kill_urb(urb); 2227 } 2228 mutex_unlock(&serial->shared_int->shared_int_lock); 2229 } 2230 tiocmget = serial->tiocmget; 2231 if (tiocmget) { 2232 wake_up_interruptible(&tiocmget->waitq); 2233 usb_kill_urb(tiocmget->urb); 2234 } 2235 2236 return 0; 2237 } 2238 2239 static void hso_serial_tty_unregister(struct hso_serial *serial) 2240 { 2241 tty_unregister_device(tty_drv, serial->minor); 2242 } 2243 2244 static void hso_serial_common_free(struct hso_serial *serial) 2245 { 2246 int i; 2247 2248 for (i = 0; i < serial->num_rx_urbs; i++) { 2249 /* unlink and free RX URB */ 2250 usb_free_urb(serial->rx_urb[i]); 2251 /* free the RX buffer */ 2252 kfree(serial->rx_data[i]); 2253 } 2254 2255 /* unlink and free TX URB */ 2256 usb_free_urb(serial->tx_urb); 2257 kfree(serial->tx_buffer); 2258 kfree(serial->tx_data); 2259 tty_port_destroy(&serial->port); 2260 } 2261 2262 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2263 int rx_size, int tx_size) 2264 { 2265 int minor; 2266 int i; 2267 2268 tty_port_init(&serial->port); 2269 2270 minor = get_free_serial_index(); 2271 if (minor < 0) 2272 goto exit; 2273 2274 /* register our minor number */ 2275 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2276 tty_drv, minor, &serial->parent->interface->dev, 2277 serial->parent, hso_serial_dev_groups); 2278 2279 /* fill in specific data for later use */ 2280 serial->minor = minor; 2281 serial->magic = HSO_SERIAL_MAGIC; 2282 spin_lock_init(&serial->serial_lock); 2283 serial->num_rx_urbs = num_urbs; 2284 2285 /* RX, allocate urb and initialize */ 2286 2287 /* prepare our RX buffer */ 2288 serial->rx_data_length = rx_size; 2289 for (i = 0; i < serial->num_rx_urbs; i++) { 2290 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2291 if (!serial->rx_urb[i]) 2292 goto exit; 2293 serial->rx_urb[i]->transfer_buffer = NULL; 2294 serial->rx_urb[i]->transfer_buffer_length = 0; 2295 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2296 GFP_KERNEL); 2297 if (!serial->rx_data[i]) 2298 goto exit; 2299 } 2300 2301 /* TX, allocate urb and initialize */ 2302 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2303 if (!serial->tx_urb) 2304 goto exit; 2305 serial->tx_urb->transfer_buffer = NULL; 2306 serial->tx_urb->transfer_buffer_length = 0; 2307 /* prepare our TX buffer */ 2308 serial->tx_data_count = 0; 2309 serial->tx_buffer_count = 0; 2310 serial->tx_data_length = tx_size; 2311 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2312 if (!serial->tx_data) 2313 goto exit; 2314 2315 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2316 if (!serial->tx_buffer) 2317 goto exit; 2318 2319 return 0; 2320 exit: 2321 hso_serial_tty_unregister(serial); 2322 hso_serial_common_free(serial); 2323 return -1; 2324 } 2325 2326 /* Creates a general hso device */ 2327 static struct hso_device *hso_create_device(struct usb_interface *intf, 2328 int port_spec) 2329 { 2330 struct hso_device *hso_dev; 2331 2332 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2333 if (!hso_dev) 2334 return NULL; 2335 2336 hso_dev->port_spec = port_spec; 2337 hso_dev->usb = interface_to_usbdev(intf); 2338 hso_dev->interface = intf; 2339 kref_init(&hso_dev->ref); 2340 mutex_init(&hso_dev->mutex); 2341 2342 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2343 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2344 2345 return hso_dev; 2346 } 2347 2348 /* Removes a network device in the network device table */ 2349 static int remove_net_device(struct hso_device *hso_dev) 2350 { 2351 int i; 2352 2353 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2354 if (network_table[i] == hso_dev) { 2355 network_table[i] = NULL; 2356 break; 2357 } 2358 } 2359 if (i == HSO_MAX_NET_DEVICES) 2360 return -1; 2361 return 0; 2362 } 2363 2364 /* Frees our network device */ 2365 static void hso_free_net_device(struct hso_device *hso_dev) 2366 { 2367 int i; 2368 struct hso_net *hso_net = dev2net(hso_dev); 2369 2370 if (!hso_net) 2371 return; 2372 2373 remove_net_device(hso_net->parent); 2374 2375 if (hso_net->net) 2376 unregister_netdev(hso_net->net); 2377 2378 /* start freeing */ 2379 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2380 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2381 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2382 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2383 } 2384 usb_free_urb(hso_net->mux_bulk_tx_urb); 2385 kfree(hso_net->mux_bulk_tx_buf); 2386 hso_net->mux_bulk_tx_buf = NULL; 2387 2388 if (hso_net->net) 2389 free_netdev(hso_net->net); 2390 2391 kfree(hso_dev); 2392 } 2393 2394 static const struct net_device_ops hso_netdev_ops = { 2395 .ndo_open = hso_net_open, 2396 .ndo_stop = hso_net_close, 2397 .ndo_start_xmit = hso_net_start_xmit, 2398 .ndo_tx_timeout = hso_net_tx_timeout, 2399 }; 2400 2401 /* initialize the network interface */ 2402 static void hso_net_init(struct net_device *net) 2403 { 2404 struct hso_net *hso_net = netdev_priv(net); 2405 2406 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2407 2408 /* fill in the other fields */ 2409 net->netdev_ops = &hso_netdev_ops; 2410 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2411 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2412 net->type = ARPHRD_NONE; 2413 net->mtu = DEFAULT_MTU - 14; 2414 net->tx_queue_len = 10; 2415 net->ethtool_ops = &ops; 2416 2417 /* and initialize the semaphore */ 2418 spin_lock_init(&hso_net->net_lock); 2419 } 2420 2421 /* Adds a network device in the network device table */ 2422 static int add_net_device(struct hso_device *hso_dev) 2423 { 2424 int i; 2425 2426 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2427 if (network_table[i] == NULL) { 2428 network_table[i] = hso_dev; 2429 break; 2430 } 2431 } 2432 if (i == HSO_MAX_NET_DEVICES) 2433 return -1; 2434 return 0; 2435 } 2436 2437 static int hso_rfkill_set_block(void *data, bool blocked) 2438 { 2439 struct hso_device *hso_dev = data; 2440 int enabled = !blocked; 2441 int rv; 2442 2443 mutex_lock(&hso_dev->mutex); 2444 if (hso_dev->usb_gone) 2445 rv = 0; 2446 else 2447 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2448 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2449 USB_CTRL_SET_TIMEOUT); 2450 mutex_unlock(&hso_dev->mutex); 2451 return rv; 2452 } 2453 2454 static const struct rfkill_ops hso_rfkill_ops = { 2455 .set_block = hso_rfkill_set_block, 2456 }; 2457 2458 /* Creates and sets up everything for rfkill */ 2459 static void hso_create_rfkill(struct hso_device *hso_dev, 2460 struct usb_interface *interface) 2461 { 2462 struct hso_net *hso_net = dev2net(hso_dev); 2463 struct device *dev = &hso_net->net->dev; 2464 static u32 rfkill_counter; 2465 2466 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2467 rfkill_counter++); 2468 2469 hso_net->rfkill = rfkill_alloc(hso_net->name, 2470 &interface_to_usbdev(interface)->dev, 2471 RFKILL_TYPE_WWAN, 2472 &hso_rfkill_ops, hso_dev); 2473 if (!hso_net->rfkill) { 2474 dev_err(dev, "%s - Out of memory\n", __func__); 2475 return; 2476 } 2477 if (rfkill_register(hso_net->rfkill) < 0) { 2478 rfkill_destroy(hso_net->rfkill); 2479 hso_net->rfkill = NULL; 2480 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2481 return; 2482 } 2483 } 2484 2485 static struct device_type hso_type = { 2486 .name = "wwan", 2487 }; 2488 2489 /* Creates our network device */ 2490 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2491 int port_spec) 2492 { 2493 int result, i; 2494 struct net_device *net; 2495 struct hso_net *hso_net; 2496 struct hso_device *hso_dev; 2497 2498 hso_dev = hso_create_device(interface, port_spec); 2499 if (!hso_dev) 2500 return NULL; 2501 2502 /* allocate our network device, then we can put in our private data */ 2503 /* call hso_net_init to do the basic initialization */ 2504 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2505 hso_net_init); 2506 if (!net) { 2507 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2508 goto exit; 2509 } 2510 2511 hso_net = netdev_priv(net); 2512 2513 hso_dev->port_data.dev_net = hso_net; 2514 hso_net->net = net; 2515 hso_net->parent = hso_dev; 2516 2517 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2518 USB_DIR_IN); 2519 if (!hso_net->in_endp) { 2520 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2521 goto exit; 2522 } 2523 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2524 USB_DIR_OUT); 2525 if (!hso_net->out_endp) { 2526 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2527 goto exit; 2528 } 2529 SET_NETDEV_DEV(net, &interface->dev); 2530 SET_NETDEV_DEVTYPE(net, &hso_type); 2531 2532 /* start allocating */ 2533 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2534 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2535 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2536 goto exit; 2537 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2538 GFP_KERNEL); 2539 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2540 goto exit; 2541 } 2542 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2543 if (!hso_net->mux_bulk_tx_urb) 2544 goto exit; 2545 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2546 if (!hso_net->mux_bulk_tx_buf) 2547 goto exit; 2548 2549 add_net_device(hso_dev); 2550 2551 /* registering our net device */ 2552 result = register_netdev(net); 2553 if (result) { 2554 dev_err(&interface->dev, "Failed to register device\n"); 2555 goto exit; 2556 } 2557 2558 hso_log_port(hso_dev); 2559 2560 hso_create_rfkill(hso_dev, interface); 2561 2562 return hso_dev; 2563 exit: 2564 hso_free_net_device(hso_dev); 2565 return NULL; 2566 } 2567 2568 static void hso_free_tiomget(struct hso_serial *serial) 2569 { 2570 struct hso_tiocmget *tiocmget; 2571 if (!serial) 2572 return; 2573 tiocmget = serial->tiocmget; 2574 if (tiocmget) { 2575 usb_free_urb(tiocmget->urb); 2576 tiocmget->urb = NULL; 2577 serial->tiocmget = NULL; 2578 kfree(tiocmget); 2579 } 2580 } 2581 2582 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2583 static void hso_free_serial_device(struct hso_device *hso_dev) 2584 { 2585 struct hso_serial *serial = dev2ser(hso_dev); 2586 2587 if (!serial) 2588 return; 2589 2590 hso_serial_common_free(serial); 2591 2592 if (serial->shared_int) { 2593 mutex_lock(&serial->shared_int->shared_int_lock); 2594 if (--serial->shared_int->ref_count == 0) 2595 hso_free_shared_int(serial->shared_int); 2596 else 2597 mutex_unlock(&serial->shared_int->shared_int_lock); 2598 } 2599 hso_free_tiomget(serial); 2600 kfree(serial); 2601 kfree(hso_dev); 2602 } 2603 2604 /* Creates a bulk AT channel */ 2605 static struct hso_device *hso_create_bulk_serial_device( 2606 struct usb_interface *interface, int port) 2607 { 2608 struct hso_device *hso_dev; 2609 struct hso_serial *serial; 2610 int num_urbs; 2611 struct hso_tiocmget *tiocmget; 2612 2613 hso_dev = hso_create_device(interface, port); 2614 if (!hso_dev) 2615 return NULL; 2616 2617 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2618 if (!serial) 2619 goto exit; 2620 2621 serial->parent = hso_dev; 2622 hso_dev->port_data.dev_serial = serial; 2623 2624 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2625 num_urbs = 2; 2626 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2627 GFP_KERNEL); 2628 /* it isn't going to break our heart if serial->tiocmget 2629 * allocation fails don't bother checking this. 2630 */ 2631 if (serial->tiocmget) { 2632 tiocmget = serial->tiocmget; 2633 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2634 if (tiocmget->urb) { 2635 mutex_init(&tiocmget->mutex); 2636 init_waitqueue_head(&tiocmget->waitq); 2637 tiocmget->endp = hso_get_ep( 2638 interface, 2639 USB_ENDPOINT_XFER_INT, 2640 USB_DIR_IN); 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 IN ep\n"); 2663 goto exit2; 2664 } 2665 2666 serial->write_data = hso_std_serial_write_data; 2667 2668 /* and record this serial */ 2669 set_serial_by_index(serial->minor, serial); 2670 2671 /* setup the proc dirs and files if needed */ 2672 hso_log_port(hso_dev); 2673 2674 /* done, return it */ 2675 return hso_dev; 2676 2677 exit2: 2678 hso_serial_tty_unregister(serial); 2679 hso_serial_common_free(serial); 2680 exit: 2681 hso_free_tiomget(serial); 2682 kfree(serial); 2683 kfree(hso_dev); 2684 return NULL; 2685 } 2686 2687 /* Creates a multiplexed AT channel */ 2688 static 2689 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2690 int port, 2691 struct hso_shared_int *mux) 2692 { 2693 struct hso_device *hso_dev; 2694 struct hso_serial *serial; 2695 int port_spec; 2696 2697 port_spec = HSO_INTF_MUX; 2698 port_spec &= ~HSO_PORT_MASK; 2699 2700 port_spec |= hso_mux_to_port(port); 2701 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2702 return NULL; 2703 2704 hso_dev = hso_create_device(interface, port_spec); 2705 if (!hso_dev) 2706 return NULL; 2707 2708 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2709 if (!serial) 2710 goto exit; 2711 2712 hso_dev->port_data.dev_serial = serial; 2713 serial->parent = hso_dev; 2714 2715 if (hso_serial_common_create 2716 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2717 goto exit; 2718 2719 serial->tx_data_length--; 2720 serial->write_data = hso_mux_serial_write_data; 2721 2722 serial->shared_int = mux; 2723 mutex_lock(&serial->shared_int->shared_int_lock); 2724 serial->shared_int->ref_count++; 2725 mutex_unlock(&serial->shared_int->shared_int_lock); 2726 2727 /* and record this serial */ 2728 set_serial_by_index(serial->minor, serial); 2729 2730 /* setup the proc dirs and files if needed */ 2731 hso_log_port(hso_dev); 2732 2733 /* done, return it */ 2734 return hso_dev; 2735 2736 exit: 2737 if (serial) { 2738 tty_unregister_device(tty_drv, serial->minor); 2739 kfree(serial); 2740 } 2741 kfree(hso_dev); 2742 return NULL; 2743 2744 } 2745 2746 static void hso_free_shared_int(struct hso_shared_int *mux) 2747 { 2748 usb_free_urb(mux->shared_intr_urb); 2749 kfree(mux->shared_intr_buf); 2750 mutex_unlock(&mux->shared_int_lock); 2751 kfree(mux); 2752 } 2753 2754 static 2755 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2756 { 2757 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2758 2759 if (!mux) 2760 return NULL; 2761 2762 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2763 USB_DIR_IN); 2764 if (!mux->intr_endp) { 2765 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2766 goto exit; 2767 } 2768 2769 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2770 if (!mux->shared_intr_urb) 2771 goto exit; 2772 mux->shared_intr_buf = 2773 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2774 GFP_KERNEL); 2775 if (!mux->shared_intr_buf) 2776 goto exit; 2777 2778 mutex_init(&mux->shared_int_lock); 2779 2780 return mux; 2781 2782 exit: 2783 kfree(mux->shared_intr_buf); 2784 usb_free_urb(mux->shared_intr_urb); 2785 kfree(mux); 2786 return NULL; 2787 } 2788 2789 /* Gets the port spec for a certain interface */ 2790 static int hso_get_config_data(struct usb_interface *interface) 2791 { 2792 struct usb_device *usbdev = interface_to_usbdev(interface); 2793 u8 *config_data = kmalloc(17, GFP_KERNEL); 2794 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2795 s32 result; 2796 2797 if (!config_data) 2798 return -ENOMEM; 2799 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2800 0x86, 0xC0, 0, 0, config_data, 17, 2801 USB_CTRL_SET_TIMEOUT) != 0x11) { 2802 kfree(config_data); 2803 return -EIO; 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 port_spec = ((u32 *)(id->driver_info))[if_num]; 2878 else 2879 port_spec = hso_get_config_data(interface); 2880 2881 /* Check if we need to switch to alt interfaces prior to port 2882 * configuration */ 2883 if (interface->num_altsetting > 1) 2884 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2885 interface->needs_remote_wakeup = 1; 2886 2887 /* Allocate new hso device(s) */ 2888 switch (port_spec & HSO_INTF_MASK) { 2889 case HSO_INTF_MUX: 2890 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2891 /* Create the network device */ 2892 if (!disable_net) { 2893 hso_dev = hso_create_net_device(interface, 2894 port_spec); 2895 if (!hso_dev) 2896 goto exit; 2897 tmp_dev = hso_dev; 2898 } 2899 } 2900 2901 if (hso_get_mux_ports(interface, &port_mask)) 2902 /* TODO: de-allocate everything */ 2903 goto exit; 2904 2905 shared_int = hso_create_shared_int(interface); 2906 if (!shared_int) 2907 goto exit; 2908 2909 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2910 if (port_mask & i) { 2911 hso_dev = hso_create_mux_serial_device( 2912 interface, i, shared_int); 2913 if (!hso_dev) 2914 goto exit; 2915 } 2916 } 2917 2918 if (tmp_dev) 2919 hso_dev = tmp_dev; 2920 break; 2921 2922 case HSO_INTF_BULK: 2923 /* It's a regular bulk interface */ 2924 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2925 if (!disable_net) 2926 hso_dev = 2927 hso_create_net_device(interface, port_spec); 2928 } else { 2929 hso_dev = 2930 hso_create_bulk_serial_device(interface, port_spec); 2931 } 2932 if (!hso_dev) 2933 goto exit; 2934 break; 2935 default: 2936 goto exit; 2937 } 2938 2939 /* save our data pointer in this device */ 2940 usb_set_intfdata(interface, hso_dev); 2941 2942 /* done */ 2943 return 0; 2944 exit: 2945 hso_free_interface(interface); 2946 return -ENODEV; 2947 } 2948 2949 /* device removed, cleaning up */ 2950 static void hso_disconnect(struct usb_interface *interface) 2951 { 2952 hso_free_interface(interface); 2953 2954 /* remove reference of our private data */ 2955 usb_set_intfdata(interface, NULL); 2956 } 2957 2958 static void async_get_intf(struct work_struct *data) 2959 { 2960 struct hso_device *hso_dev = 2961 container_of(data, struct hso_device, async_get_intf); 2962 usb_autopm_get_interface(hso_dev->interface); 2963 } 2964 2965 static void async_put_intf(struct work_struct *data) 2966 { 2967 struct hso_device *hso_dev = 2968 container_of(data, struct hso_device, async_put_intf); 2969 usb_autopm_put_interface(hso_dev->interface); 2970 } 2971 2972 static int hso_get_activity(struct hso_device *hso_dev) 2973 { 2974 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2975 if (!hso_dev->is_active) { 2976 hso_dev->is_active = 1; 2977 schedule_work(&hso_dev->async_get_intf); 2978 } 2979 } 2980 2981 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2982 return -EAGAIN; 2983 2984 usb_mark_last_busy(hso_dev->usb); 2985 2986 return 0; 2987 } 2988 2989 static int hso_put_activity(struct hso_device *hso_dev) 2990 { 2991 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2992 if (hso_dev->is_active) { 2993 hso_dev->is_active = 0; 2994 schedule_work(&hso_dev->async_put_intf); 2995 return -EAGAIN; 2996 } 2997 } 2998 hso_dev->is_active = 0; 2999 return 0; 3000 } 3001 3002 /* called by kernel when we need to suspend device */ 3003 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3004 { 3005 int i, result; 3006 3007 /* Stop all serial ports */ 3008 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3009 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3010 result = hso_stop_serial_device(serial_table[i]); 3011 if (result) 3012 goto out; 3013 } 3014 } 3015 3016 /* Stop all network ports */ 3017 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3018 if (network_table[i] && 3019 (network_table[i]->interface == iface)) { 3020 result = hso_stop_net_device(network_table[i]); 3021 if (result) 3022 goto out; 3023 } 3024 } 3025 3026 out: 3027 return 0; 3028 } 3029 3030 /* called by kernel when we need to resume device */ 3031 static int hso_resume(struct usb_interface *iface) 3032 { 3033 int i, result = 0; 3034 struct hso_net *hso_net; 3035 3036 /* Start all serial ports */ 3037 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3038 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3039 if (dev2ser(serial_table[i])->port.count) { 3040 result = 3041 hso_start_serial_device(serial_table[i], GFP_NOIO); 3042 hso_kick_transmit(dev2ser(serial_table[i])); 3043 if (result) 3044 goto out; 3045 } 3046 } 3047 } 3048 3049 /* Start all network ports */ 3050 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3051 if (network_table[i] && 3052 (network_table[i]->interface == iface)) { 3053 hso_net = dev2net(network_table[i]); 3054 if (hso_net->flags & IFF_UP) { 3055 /* First transmit any lingering data, 3056 then restart the device. */ 3057 if (hso_net->skb_tx_buf) { 3058 dev_dbg(&iface->dev, 3059 "Transmitting" 3060 " lingering data\n"); 3061 hso_net_start_xmit(hso_net->skb_tx_buf, 3062 hso_net->net); 3063 hso_net->skb_tx_buf = NULL; 3064 } 3065 result = hso_start_net_device(network_table[i]); 3066 if (result) 3067 goto out; 3068 } 3069 } 3070 } 3071 3072 out: 3073 return result; 3074 } 3075 3076 static void hso_serial_ref_free(struct kref *ref) 3077 { 3078 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3079 3080 hso_free_serial_device(hso_dev); 3081 } 3082 3083 static void hso_free_interface(struct usb_interface *interface) 3084 { 3085 struct hso_serial *serial; 3086 int i; 3087 3088 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3089 if (serial_table[i] && 3090 (serial_table[i]->interface == interface)) { 3091 serial = dev2ser(serial_table[i]); 3092 tty_port_tty_hangup(&serial->port, false); 3093 mutex_lock(&serial->parent->mutex); 3094 serial->parent->usb_gone = 1; 3095 mutex_unlock(&serial->parent->mutex); 3096 cancel_work_sync(&serial_table[i]->async_put_intf); 3097 cancel_work_sync(&serial_table[i]->async_get_intf); 3098 hso_serial_tty_unregister(serial); 3099 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3100 set_serial_by_index(i, NULL); 3101 } 3102 } 3103 3104 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3105 if (network_table[i] && 3106 (network_table[i]->interface == interface)) { 3107 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3108 /* hso_stop_net_device doesn't stop the net queue since 3109 * traffic needs to start it again when suspended */ 3110 netif_stop_queue(dev2net(network_table[i])->net); 3111 hso_stop_net_device(network_table[i]); 3112 cancel_work_sync(&network_table[i]->async_put_intf); 3113 cancel_work_sync(&network_table[i]->async_get_intf); 3114 if (rfk) { 3115 rfkill_unregister(rfk); 3116 rfkill_destroy(rfk); 3117 } 3118 hso_free_net_device(network_table[i]); 3119 } 3120 } 3121 } 3122 3123 /* Helper functions */ 3124 3125 /* Get the endpoint ! */ 3126 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3127 int type, int dir) 3128 { 3129 int i; 3130 struct usb_host_interface *iface = intf->cur_altsetting; 3131 struct usb_endpoint_descriptor *endp; 3132 3133 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3134 endp = &iface->endpoint[i].desc; 3135 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3136 (usb_endpoint_type(endp) == type)) 3137 return endp; 3138 } 3139 3140 return NULL; 3141 } 3142 3143 /* Get the byte that describes which ports are enabled */ 3144 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3145 { 3146 int i; 3147 struct usb_host_interface *iface = intf->cur_altsetting; 3148 3149 if (iface->extralen == 3) { 3150 *ports = iface->extra[2]; 3151 return 0; 3152 } 3153 3154 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3155 if (iface->endpoint[i].extralen == 3) { 3156 *ports = iface->endpoint[i].extra[2]; 3157 return 0; 3158 } 3159 } 3160 3161 return -1; 3162 } 3163 3164 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3165 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3166 struct usb_device *usb, gfp_t gfp) 3167 { 3168 int result; 3169 3170 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3171 usb_rcvintpipe(usb, 3172 shared_int->intr_endp->bEndpointAddress & 0x7F), 3173 shared_int->shared_intr_buf, 3174 1, 3175 intr_callback, shared_int, 3176 shared_int->intr_endp->bInterval); 3177 3178 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3179 if (result) 3180 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3181 result); 3182 3183 return result; 3184 } 3185 3186 /* operations setup of the serial interface */ 3187 static const struct tty_operations hso_serial_ops = { 3188 .open = hso_serial_open, 3189 .close = hso_serial_close, 3190 .write = hso_serial_write, 3191 .write_room = hso_serial_write_room, 3192 .cleanup = hso_serial_cleanup, 3193 .ioctl = hso_serial_ioctl, 3194 .set_termios = hso_serial_set_termios, 3195 .chars_in_buffer = hso_serial_chars_in_buffer, 3196 .tiocmget = hso_serial_tiocmget, 3197 .tiocmset = hso_serial_tiocmset, 3198 .get_icount = hso_get_count, 3199 .unthrottle = hso_unthrottle 3200 }; 3201 3202 static struct usb_driver hso_driver = { 3203 .name = driver_name, 3204 .probe = hso_probe, 3205 .disconnect = hso_disconnect, 3206 .id_table = hso_ids, 3207 .suspend = hso_suspend, 3208 .resume = hso_resume, 3209 .reset_resume = hso_resume, 3210 .supports_autosuspend = 1, 3211 .disable_hub_initiated_lpm = 1, 3212 }; 3213 3214 static int __init hso_init(void) 3215 { 3216 int i; 3217 int result; 3218 3219 /* put it in the log */ 3220 pr_info("%s\n", version); 3221 3222 /* Initialise the serial table semaphore and table */ 3223 spin_lock_init(&serial_table_lock); 3224 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3225 serial_table[i] = NULL; 3226 3227 /* allocate our driver using the proper amount of supported minors */ 3228 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3229 if (!tty_drv) 3230 return -ENOMEM; 3231 3232 /* fill in all needed values */ 3233 tty_drv->driver_name = driver_name; 3234 tty_drv->name = tty_filename; 3235 3236 /* if major number is provided as parameter, use that one */ 3237 if (tty_major) 3238 tty_drv->major = tty_major; 3239 3240 tty_drv->minor_start = 0; 3241 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3242 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3243 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3244 tty_drv->init_termios = tty_std_termios; 3245 hso_init_termios(&tty_drv->init_termios); 3246 tty_set_operations(tty_drv, &hso_serial_ops); 3247 3248 /* register the tty driver */ 3249 result = tty_register_driver(tty_drv); 3250 if (result) { 3251 pr_err("%s - tty_register_driver failed(%d)\n", 3252 __func__, result); 3253 goto err_free_tty; 3254 } 3255 3256 /* register this module as an usb driver */ 3257 result = usb_register(&hso_driver); 3258 if (result) { 3259 pr_err("Could not register hso driver - error: %d\n", result); 3260 goto err_unreg_tty; 3261 } 3262 3263 /* done */ 3264 return 0; 3265 err_unreg_tty: 3266 tty_unregister_driver(tty_drv); 3267 err_free_tty: 3268 put_tty_driver(tty_drv); 3269 return result; 3270 } 3271 3272 static void __exit hso_exit(void) 3273 { 3274 pr_info("unloaded\n"); 3275 3276 tty_unregister_driver(tty_drv); 3277 /* deregister the usb driver */ 3278 usb_deregister(&hso_driver); 3279 put_tty_driver(tty_drv); 3280 } 3281 3282 /* Module definitions */ 3283 module_init(hso_init); 3284 module_exit(hso_exit); 3285 3286 MODULE_AUTHOR(MOD_AUTHOR); 3287 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3288 MODULE_LICENSE("GPL"); 3289 3290 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3291 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3292 module_param(debug, int, S_IRUGO | S_IWUSR); 3293 3294 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3295 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3296 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3297 3298 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3299 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3300 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3301