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, 0444, 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 unsigned long flags; 1003 int status = urb->status; 1004 1005 /* is al ok? (Filip: Who's Al ?) */ 1006 if (status) { 1007 handle_usb_error(status, __func__, odev->parent); 1008 return; 1009 } 1010 1011 /* Sanity check */ 1012 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1013 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1014 return; 1015 } 1016 usb_mark_last_busy(urb->dev); 1017 1018 net = odev->net; 1019 1020 if (!netif_device_present(net)) { 1021 /* Somebody killed our network interface... */ 1022 return; 1023 } 1024 1025 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1026 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1027 1028 /* do we even have a packet? */ 1029 if (urb->actual_length) { 1030 /* Handle the IP stream, add header and push it onto network 1031 * stack if the packet is complete. */ 1032 spin_lock_irqsave(&odev->net_lock, flags); 1033 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1034 (urb->transfer_buffer_length > 1035 urb->actual_length) ? 1 : 0); 1036 spin_unlock_irqrestore(&odev->net_lock, flags); 1037 } 1038 1039 /* We are done with this URB, resubmit it. Prep the USB to wait for 1040 * another frame. Reuse same as received. */ 1041 usb_fill_bulk_urb(urb, 1042 odev->parent->usb, 1043 usb_rcvbulkpipe(odev->parent->usb, 1044 odev->in_endp-> 1045 bEndpointAddress & 0x7F), 1046 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1047 read_bulk_callback, odev); 1048 1049 /* Give this to the USB subsystem so it can tell us when more data 1050 * arrives. */ 1051 result = usb_submit_urb(urb, GFP_ATOMIC); 1052 if (result) 1053 dev_warn(&odev->parent->interface->dev, 1054 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1055 result); 1056 } 1057 1058 /* Serial driver functions */ 1059 1060 static void hso_init_termios(struct ktermios *termios) 1061 { 1062 /* 1063 * The default requirements for this device are: 1064 */ 1065 termios->c_iflag &= 1066 ~(IGNBRK /* disable ignore break */ 1067 | BRKINT /* disable break causes interrupt */ 1068 | PARMRK /* disable mark parity errors */ 1069 | ISTRIP /* disable clear high bit of input characters */ 1070 | INLCR /* disable translate NL to CR */ 1071 | IGNCR /* disable ignore CR */ 1072 | ICRNL /* disable translate CR to NL */ 1073 | IXON); /* disable enable XON/XOFF flow control */ 1074 1075 /* disable postprocess output characters */ 1076 termios->c_oflag &= ~OPOST; 1077 1078 termios->c_lflag &= 1079 ~(ECHO /* disable echo input characters */ 1080 | ECHONL /* disable echo new line */ 1081 | ICANON /* disable erase, kill, werase, and rprnt 1082 special characters */ 1083 | ISIG /* disable interrupt, quit, and suspend special 1084 characters */ 1085 | IEXTEN); /* disable non-POSIX special characters */ 1086 1087 termios->c_cflag &= 1088 ~(CSIZE /* no size */ 1089 | PARENB /* disable parity bit */ 1090 | CBAUD /* clear current baud rate */ 1091 | CBAUDEX); /* clear current buad rate */ 1092 1093 termios->c_cflag |= CS8; /* character size 8 bits */ 1094 1095 /* baud rate 115200 */ 1096 tty_termios_encode_baud_rate(termios, 115200, 115200); 1097 } 1098 1099 static void _hso_serial_set_termios(struct tty_struct *tty, 1100 struct ktermios *old) 1101 { 1102 struct hso_serial *serial = tty->driver_data; 1103 1104 if (!serial) { 1105 pr_err("%s: no tty structures", __func__); 1106 return; 1107 } 1108 1109 hso_dbg(0x8, "port %d\n", serial->minor); 1110 1111 /* 1112 * Fix up unsupported bits 1113 */ 1114 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1115 1116 tty->termios.c_cflag &= 1117 ~(CSIZE /* no size */ 1118 | PARENB /* disable parity bit */ 1119 | CBAUD /* clear current baud rate */ 1120 | CBAUDEX); /* clear current buad rate */ 1121 1122 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1123 1124 /* baud rate 115200 */ 1125 tty_encode_baud_rate(tty, 115200, 115200); 1126 } 1127 1128 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1129 { 1130 int result; 1131 /* We are done with this URB, resubmit it. Prep the USB to wait for 1132 * another frame */ 1133 usb_fill_bulk_urb(urb, serial->parent->usb, 1134 usb_rcvbulkpipe(serial->parent->usb, 1135 serial->in_endp-> 1136 bEndpointAddress & 0x7F), 1137 urb->transfer_buffer, serial->rx_data_length, 1138 hso_std_serial_read_bulk_callback, serial); 1139 /* Give this to the USB subsystem so it can tell us when more data 1140 * arrives. */ 1141 result = usb_submit_urb(urb, GFP_ATOMIC); 1142 if (result) { 1143 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1144 __func__, result); 1145 } 1146 } 1147 1148 1149 1150 1151 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1152 { 1153 int count; 1154 struct urb *curr_urb; 1155 1156 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1157 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1158 count = put_rxbuf_data(curr_urb, serial); 1159 if (count == -1) 1160 return; 1161 if (count == 0) { 1162 serial->curr_rx_urb_idx++; 1163 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1164 serial->curr_rx_urb_idx = 0; 1165 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1166 } 1167 } 1168 } 1169 1170 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1171 { 1172 int count = 0; 1173 struct urb *urb; 1174 1175 urb = serial->rx_urb[0]; 1176 if (serial->port.count > 0) { 1177 count = put_rxbuf_data(urb, serial); 1178 if (count == -1) 1179 return; 1180 } 1181 /* Re issue a read as long as we receive data. */ 1182 1183 if (count == 0 && ((urb->actual_length != 0) || 1184 (serial->rx_state == RX_PENDING))) { 1185 serial->rx_state = RX_SENT; 1186 hso_mux_serial_read(serial); 1187 } else 1188 serial->rx_state = RX_IDLE; 1189 } 1190 1191 1192 /* read callback for Diag and CS port */ 1193 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1194 { 1195 struct hso_serial *serial = urb->context; 1196 int status = urb->status; 1197 unsigned long flags; 1198 1199 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1200 1201 /* sanity check */ 1202 if (!serial) { 1203 hso_dbg(0x1, "serial == NULL\n"); 1204 return; 1205 } 1206 if (status) { 1207 handle_usb_error(status, __func__, serial->parent); 1208 return; 1209 } 1210 1211 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1212 DUMP1(urb->transfer_buffer, urb->actual_length); 1213 1214 /* Anyone listening? */ 1215 if (serial->port.count == 0) 1216 return; 1217 1218 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1219 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1220 /* Valid data, handle RX data */ 1221 spin_lock_irqsave(&serial->serial_lock, flags); 1222 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1223 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1224 spin_unlock_irqrestore(&serial->serial_lock, flags); 1225 } 1226 1227 /* 1228 * This needs to be a tasklet otherwise we will 1229 * end up recursively calling this function. 1230 */ 1231 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1232 { 1233 unsigned long flags; 1234 1235 spin_lock_irqsave(&serial->serial_lock, flags); 1236 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1237 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1238 else 1239 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1240 spin_unlock_irqrestore(&serial->serial_lock, flags); 1241 } 1242 1243 static void hso_unthrottle(struct tty_struct *tty) 1244 { 1245 struct hso_serial *serial = tty->driver_data; 1246 1247 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1248 } 1249 1250 /* open the requested serial port */ 1251 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1252 { 1253 struct hso_serial *serial = get_serial_by_index(tty->index); 1254 int result; 1255 1256 /* sanity check */ 1257 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1258 WARN_ON(1); 1259 tty->driver_data = NULL; 1260 hso_dbg(0x1, "Failed to open port\n"); 1261 return -ENODEV; 1262 } 1263 1264 mutex_lock(&serial->parent->mutex); 1265 result = usb_autopm_get_interface(serial->parent->interface); 1266 if (result < 0) 1267 goto err_out; 1268 1269 hso_dbg(0x1, "Opening %d\n", serial->minor); 1270 1271 /* setup */ 1272 tty->driver_data = serial; 1273 tty_port_tty_set(&serial->port, tty); 1274 1275 /* check for port already opened, if not set the termios */ 1276 serial->port.count++; 1277 if (serial->port.count == 1) { 1278 serial->rx_state = RX_IDLE; 1279 /* Force default termio settings */ 1280 _hso_serial_set_termios(tty, NULL); 1281 tasklet_init(&serial->unthrottle_tasklet, 1282 (void (*)(unsigned long))hso_unthrottle_tasklet, 1283 (unsigned long)serial); 1284 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1285 if (result) { 1286 hso_stop_serial_device(serial->parent); 1287 serial->port.count--; 1288 } else { 1289 kref_get(&serial->parent->ref); 1290 } 1291 } else { 1292 hso_dbg(0x1, "Port was already open\n"); 1293 } 1294 1295 usb_autopm_put_interface(serial->parent->interface); 1296 1297 /* done */ 1298 if (result) 1299 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1300 err_out: 1301 mutex_unlock(&serial->parent->mutex); 1302 return result; 1303 } 1304 1305 /* close the requested serial port */ 1306 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1307 { 1308 struct hso_serial *serial = tty->driver_data; 1309 u8 usb_gone; 1310 1311 hso_dbg(0x1, "Closing serial port\n"); 1312 1313 /* Open failed, no close cleanup required */ 1314 if (serial == NULL) 1315 return; 1316 1317 mutex_lock(&serial->parent->mutex); 1318 usb_gone = serial->parent->usb_gone; 1319 1320 if (!usb_gone) 1321 usb_autopm_get_interface(serial->parent->interface); 1322 1323 /* reset the rts and dtr */ 1324 /* do the actual close */ 1325 serial->port.count--; 1326 1327 if (serial->port.count <= 0) { 1328 serial->port.count = 0; 1329 tty_port_tty_set(&serial->port, NULL); 1330 if (!usb_gone) 1331 hso_stop_serial_device(serial->parent); 1332 tasklet_kill(&serial->unthrottle_tasklet); 1333 } 1334 1335 if (!usb_gone) 1336 usb_autopm_put_interface(serial->parent->interface); 1337 1338 mutex_unlock(&serial->parent->mutex); 1339 } 1340 1341 /* close the requested serial port */ 1342 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1343 int count) 1344 { 1345 struct hso_serial *serial = tty->driver_data; 1346 int space, tx_bytes; 1347 unsigned long flags; 1348 1349 /* sanity check */ 1350 if (serial == NULL) { 1351 pr_err("%s: serial is NULL\n", __func__); 1352 return -ENODEV; 1353 } 1354 1355 spin_lock_irqsave(&serial->serial_lock, flags); 1356 1357 space = serial->tx_data_length - serial->tx_buffer_count; 1358 tx_bytes = (count < space) ? count : space; 1359 1360 if (!tx_bytes) 1361 goto out; 1362 1363 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1364 serial->tx_buffer_count += tx_bytes; 1365 1366 out: 1367 spin_unlock_irqrestore(&serial->serial_lock, flags); 1368 1369 hso_kick_transmit(serial); 1370 /* done */ 1371 return tx_bytes; 1372 } 1373 1374 /* how much room is there for writing */ 1375 static int hso_serial_write_room(struct tty_struct *tty) 1376 { 1377 struct hso_serial *serial = tty->driver_data; 1378 int room; 1379 unsigned long flags; 1380 1381 spin_lock_irqsave(&serial->serial_lock, flags); 1382 room = serial->tx_data_length - serial->tx_buffer_count; 1383 spin_unlock_irqrestore(&serial->serial_lock, flags); 1384 1385 /* return free room */ 1386 return room; 1387 } 1388 1389 static void hso_serial_cleanup(struct tty_struct *tty) 1390 { 1391 struct hso_serial *serial = tty->driver_data; 1392 1393 if (!serial) 1394 return; 1395 1396 kref_put(&serial->parent->ref, hso_serial_ref_free); 1397 } 1398 1399 /* setup the term */ 1400 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1401 { 1402 struct hso_serial *serial = tty->driver_data; 1403 unsigned long flags; 1404 1405 if (old) 1406 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n", 1407 tty->termios.c_cflag, old->c_cflag); 1408 1409 /* the actual setup */ 1410 spin_lock_irqsave(&serial->serial_lock, flags); 1411 if (serial->port.count) 1412 _hso_serial_set_termios(tty, old); 1413 else 1414 tty->termios = *old; 1415 spin_unlock_irqrestore(&serial->serial_lock, flags); 1416 1417 /* done */ 1418 } 1419 1420 /* how many characters in the buffer */ 1421 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1422 { 1423 struct hso_serial *serial = tty->driver_data; 1424 int chars; 1425 unsigned long flags; 1426 1427 /* sanity check */ 1428 if (serial == NULL) 1429 return 0; 1430 1431 spin_lock_irqsave(&serial->serial_lock, flags); 1432 chars = serial->tx_buffer_count; 1433 spin_unlock_irqrestore(&serial->serial_lock, flags); 1434 1435 return chars; 1436 } 1437 static int tiocmget_submit_urb(struct hso_serial *serial, 1438 struct hso_tiocmget *tiocmget, 1439 struct usb_device *usb) 1440 { 1441 int result; 1442 1443 if (serial->parent->usb_gone) 1444 return -ENODEV; 1445 usb_fill_int_urb(tiocmget->urb, usb, 1446 usb_rcvintpipe(usb, 1447 tiocmget->endp-> 1448 bEndpointAddress & 0x7F), 1449 &tiocmget->serial_state_notification, 1450 sizeof(struct hso_serial_state_notification), 1451 tiocmget_intr_callback, serial, 1452 tiocmget->endp->bInterval); 1453 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1454 if (result) { 1455 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1456 result); 1457 } 1458 return result; 1459 1460 } 1461 1462 static void tiocmget_intr_callback(struct urb *urb) 1463 { 1464 struct hso_serial *serial = urb->context; 1465 struct hso_tiocmget *tiocmget; 1466 int status = urb->status; 1467 u16 UART_state_bitmap, prev_UART_state_bitmap; 1468 struct uart_icount *icount; 1469 struct hso_serial_state_notification *serial_state_notification; 1470 struct usb_device *usb; 1471 struct usb_interface *interface; 1472 int if_num; 1473 1474 /* Sanity checks */ 1475 if (!serial) 1476 return; 1477 if (status) { 1478 handle_usb_error(status, __func__, serial->parent); 1479 return; 1480 } 1481 1482 /* tiocmget is only supported on HSO_PORT_MODEM */ 1483 tiocmget = serial->tiocmget; 1484 if (!tiocmget) 1485 return; 1486 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1487 1488 usb = serial->parent->usb; 1489 interface = serial->parent->interface; 1490 1491 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1492 1493 /* wIndex should be the USB interface number of the port to which the 1494 * notification applies, which should always be the Modem port. 1495 */ 1496 serial_state_notification = &tiocmget->serial_state_notification; 1497 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1498 serial_state_notification->bNotification != B_NOTIFICATION || 1499 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1500 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1501 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1502 dev_warn(&usb->dev, 1503 "hso received invalid serial state notification\n"); 1504 DUMP(serial_state_notification, 1505 sizeof(struct hso_serial_state_notification)); 1506 } else { 1507 unsigned long flags; 1508 1509 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1510 UART_state_bitmap); 1511 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1512 icount = &tiocmget->icount; 1513 spin_lock_irqsave(&serial->serial_lock, flags); 1514 if ((UART_state_bitmap & B_OVERRUN) != 1515 (prev_UART_state_bitmap & B_OVERRUN)) 1516 icount->parity++; 1517 if ((UART_state_bitmap & B_PARITY) != 1518 (prev_UART_state_bitmap & B_PARITY)) 1519 icount->parity++; 1520 if ((UART_state_bitmap & B_FRAMING) != 1521 (prev_UART_state_bitmap & B_FRAMING)) 1522 icount->frame++; 1523 if ((UART_state_bitmap & B_RING_SIGNAL) && 1524 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1525 icount->rng++; 1526 if ((UART_state_bitmap & B_BREAK) != 1527 (prev_UART_state_bitmap & B_BREAK)) 1528 icount->brk++; 1529 if ((UART_state_bitmap & B_TX_CARRIER) != 1530 (prev_UART_state_bitmap & B_TX_CARRIER)) 1531 icount->dsr++; 1532 if ((UART_state_bitmap & B_RX_CARRIER) != 1533 (prev_UART_state_bitmap & B_RX_CARRIER)) 1534 icount->dcd++; 1535 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1536 spin_unlock_irqrestore(&serial->serial_lock, flags); 1537 tiocmget->intr_completed = 1; 1538 wake_up_interruptible(&tiocmget->waitq); 1539 } 1540 memset(serial_state_notification, 0, 1541 sizeof(struct hso_serial_state_notification)); 1542 tiocmget_submit_urb(serial, 1543 tiocmget, 1544 serial->parent->usb); 1545 } 1546 1547 /* 1548 * next few functions largely stolen from drivers/serial/serial_core.c 1549 */ 1550 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1551 * - mask passed in arg for lines of interest 1552 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1553 * Caller should use TIOCGICOUNT to see which one it was 1554 */ 1555 static int 1556 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1557 { 1558 DECLARE_WAITQUEUE(wait, current); 1559 struct uart_icount cprev, cnow; 1560 struct hso_tiocmget *tiocmget; 1561 int ret; 1562 1563 tiocmget = serial->tiocmget; 1564 if (!tiocmget) 1565 return -ENOENT; 1566 /* 1567 * note the counters on entry 1568 */ 1569 spin_lock_irq(&serial->serial_lock); 1570 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1571 spin_unlock_irq(&serial->serial_lock); 1572 add_wait_queue(&tiocmget->waitq, &wait); 1573 for (;;) { 1574 spin_lock_irq(&serial->serial_lock); 1575 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1576 spin_unlock_irq(&serial->serial_lock); 1577 set_current_state(TASK_INTERRUPTIBLE); 1578 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1579 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1580 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1581 ret = 0; 1582 break; 1583 } 1584 schedule(); 1585 /* see if a signal did it */ 1586 if (signal_pending(current)) { 1587 ret = -ERESTARTSYS; 1588 break; 1589 } 1590 cprev = cnow; 1591 } 1592 __set_current_state(TASK_RUNNING); 1593 remove_wait_queue(&tiocmget->waitq, &wait); 1594 1595 return ret; 1596 } 1597 1598 /* 1599 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1600 * Return: write counters to the user passed counter struct 1601 * NB: both 1->0 and 0->1 transitions are counted except for 1602 * RI where only 0->1 is counted. 1603 */ 1604 static int hso_get_count(struct tty_struct *tty, 1605 struct serial_icounter_struct *icount) 1606 { 1607 struct uart_icount cnow; 1608 struct hso_serial *serial = tty->driver_data; 1609 struct hso_tiocmget *tiocmget = serial->tiocmget; 1610 1611 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1612 1613 if (!tiocmget) 1614 return -ENOENT; 1615 spin_lock_irq(&serial->serial_lock); 1616 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1617 spin_unlock_irq(&serial->serial_lock); 1618 1619 icount->cts = cnow.cts; 1620 icount->dsr = cnow.dsr; 1621 icount->rng = cnow.rng; 1622 icount->dcd = cnow.dcd; 1623 icount->rx = cnow.rx; 1624 icount->tx = cnow.tx; 1625 icount->frame = cnow.frame; 1626 icount->overrun = cnow.overrun; 1627 icount->parity = cnow.parity; 1628 icount->brk = cnow.brk; 1629 icount->buf_overrun = cnow.buf_overrun; 1630 1631 return 0; 1632 } 1633 1634 1635 static int hso_serial_tiocmget(struct tty_struct *tty) 1636 { 1637 int retval; 1638 struct hso_serial *serial = tty->driver_data; 1639 struct hso_tiocmget *tiocmget; 1640 u16 UART_state_bitmap; 1641 1642 /* sanity check */ 1643 if (!serial) { 1644 hso_dbg(0x1, "no tty structures\n"); 1645 return -EINVAL; 1646 } 1647 spin_lock_irq(&serial->serial_lock); 1648 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1649 ((serial->dtr_state) ? TIOCM_DTR : 0); 1650 tiocmget = serial->tiocmget; 1651 if (tiocmget) { 1652 1653 UART_state_bitmap = le16_to_cpu( 1654 tiocmget->prev_UART_state_bitmap); 1655 if (UART_state_bitmap & B_RING_SIGNAL) 1656 retval |= TIOCM_RNG; 1657 if (UART_state_bitmap & B_RX_CARRIER) 1658 retval |= TIOCM_CD; 1659 if (UART_state_bitmap & B_TX_CARRIER) 1660 retval |= TIOCM_DSR; 1661 } 1662 spin_unlock_irq(&serial->serial_lock); 1663 return retval; 1664 } 1665 1666 static int hso_serial_tiocmset(struct tty_struct *tty, 1667 unsigned int set, unsigned int clear) 1668 { 1669 int val = 0; 1670 unsigned long flags; 1671 int if_num; 1672 struct hso_serial *serial = tty->driver_data; 1673 struct usb_interface *interface; 1674 1675 /* sanity check */ 1676 if (!serial) { 1677 hso_dbg(0x1, "no tty structures\n"); 1678 return -EINVAL; 1679 } 1680 1681 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1682 return -EINVAL; 1683 1684 interface = serial->parent->interface; 1685 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1686 1687 spin_lock_irqsave(&serial->serial_lock, flags); 1688 if (set & TIOCM_RTS) 1689 serial->rts_state = 1; 1690 if (set & TIOCM_DTR) 1691 serial->dtr_state = 1; 1692 1693 if (clear & TIOCM_RTS) 1694 serial->rts_state = 0; 1695 if (clear & TIOCM_DTR) 1696 serial->dtr_state = 0; 1697 1698 if (serial->dtr_state) 1699 val |= 0x01; 1700 if (serial->rts_state) 1701 val |= 0x02; 1702 1703 spin_unlock_irqrestore(&serial->serial_lock, flags); 1704 1705 return usb_control_msg(serial->parent->usb, 1706 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1707 0x21, val, if_num, NULL, 0, 1708 USB_CTRL_SET_TIMEOUT); 1709 } 1710 1711 static int hso_serial_ioctl(struct tty_struct *tty, 1712 unsigned int cmd, unsigned long arg) 1713 { 1714 struct hso_serial *serial = tty->driver_data; 1715 int ret = 0; 1716 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1717 1718 if (!serial) 1719 return -ENODEV; 1720 switch (cmd) { 1721 case TIOCMIWAIT: 1722 ret = hso_wait_modem_status(serial, arg); 1723 break; 1724 default: 1725 ret = -ENOIOCTLCMD; 1726 break; 1727 } 1728 return ret; 1729 } 1730 1731 1732 /* starts a transmit */ 1733 static void hso_kick_transmit(struct hso_serial *serial) 1734 { 1735 u8 *temp; 1736 unsigned long flags; 1737 int res; 1738 1739 spin_lock_irqsave(&serial->serial_lock, flags); 1740 if (!serial->tx_buffer_count) 1741 goto out; 1742 1743 if (serial->tx_urb_used) 1744 goto out; 1745 1746 /* Wakeup USB interface if necessary */ 1747 if (hso_get_activity(serial->parent) == -EAGAIN) 1748 goto out; 1749 1750 /* Switch pointers around to avoid memcpy */ 1751 temp = serial->tx_buffer; 1752 serial->tx_buffer = serial->tx_data; 1753 serial->tx_data = temp; 1754 serial->tx_data_count = serial->tx_buffer_count; 1755 serial->tx_buffer_count = 0; 1756 1757 /* If temp is set, it means we switched buffers */ 1758 if (temp && serial->write_data) { 1759 res = serial->write_data(serial); 1760 if (res >= 0) 1761 serial->tx_urb_used = 1; 1762 } 1763 out: 1764 spin_unlock_irqrestore(&serial->serial_lock, flags); 1765 } 1766 1767 /* make a request (for reading and writing data to muxed serial port) */ 1768 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1769 struct urb *ctrl_urb, 1770 struct usb_ctrlrequest *ctrl_req, 1771 u8 *ctrl_urb_data, u32 size) 1772 { 1773 int result; 1774 int pipe; 1775 1776 /* Sanity check */ 1777 if (!serial || !ctrl_urb || !ctrl_req) { 1778 pr_err("%s: Wrong arguments\n", __func__); 1779 return -EINVAL; 1780 } 1781 1782 /* initialize */ 1783 ctrl_req->wValue = 0; 1784 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1785 ctrl_req->wLength = cpu_to_le16(size); 1786 1787 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1788 /* Reading command */ 1789 ctrl_req->bRequestType = USB_DIR_IN | 1790 USB_TYPE_OPTION_VENDOR | 1791 USB_RECIP_INTERFACE; 1792 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1793 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1794 } else { 1795 /* Writing command */ 1796 ctrl_req->bRequestType = USB_DIR_OUT | 1797 USB_TYPE_OPTION_VENDOR | 1798 USB_RECIP_INTERFACE; 1799 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1800 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1801 } 1802 /* syslog */ 1803 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1804 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1805 ctrl_req->bRequestType, ctrl_req->wLength, port); 1806 1807 /* Load ctrl urb */ 1808 ctrl_urb->transfer_flags = 0; 1809 usb_fill_control_urb(ctrl_urb, 1810 serial->parent->usb, 1811 pipe, 1812 (u8 *) ctrl_req, 1813 ctrl_urb_data, size, ctrl_callback, serial); 1814 /* Send it on merry way */ 1815 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1816 if (result) { 1817 dev_err(&ctrl_urb->dev->dev, 1818 "%s failed submit ctrl_urb %d type %d\n", __func__, 1819 result, type); 1820 return result; 1821 } 1822 1823 /* done */ 1824 return size; 1825 } 1826 1827 /* called by intr_callback when read occurs */ 1828 static int hso_mux_serial_read(struct hso_serial *serial) 1829 { 1830 if (!serial) 1831 return -EINVAL; 1832 1833 /* clean data */ 1834 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1835 /* make the request */ 1836 1837 if (serial->num_rx_urbs != 1) { 1838 dev_err(&serial->parent->interface->dev, 1839 "ERROR: mux'd reads with multiple buffers " 1840 "not possible\n"); 1841 return 0; 1842 } 1843 return mux_device_request(serial, 1844 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1845 serial->parent->port_spec & HSO_PORT_MASK, 1846 serial->rx_urb[0], 1847 &serial->ctrl_req_rx, 1848 serial->rx_data[0], serial->rx_data_length); 1849 } 1850 1851 /* used for muxed serial port callback (muxed serial read) */ 1852 static void intr_callback(struct urb *urb) 1853 { 1854 struct hso_shared_int *shared_int = urb->context; 1855 struct hso_serial *serial; 1856 unsigned char *port_req; 1857 int status = urb->status; 1858 unsigned long flags; 1859 int i; 1860 1861 usb_mark_last_busy(urb->dev); 1862 1863 /* sanity check */ 1864 if (!shared_int) 1865 return; 1866 1867 /* status check */ 1868 if (status) { 1869 handle_usb_error(status, __func__, NULL); 1870 return; 1871 } 1872 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1873 1874 /* what request? */ 1875 port_req = urb->transfer_buffer; 1876 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1877 /* loop over all muxed ports to find the one sending this */ 1878 for (i = 0; i < 8; i++) { 1879 /* max 8 channels on MUX */ 1880 if (*port_req & (1 << i)) { 1881 serial = get_serial_by_shared_int_and_type(shared_int, 1882 (1 << i)); 1883 if (serial != NULL) { 1884 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1885 i); 1886 spin_lock_irqsave(&serial->serial_lock, flags); 1887 if (serial->rx_state == RX_IDLE && 1888 serial->port.count > 0) { 1889 /* Setup and send a ctrl req read on 1890 * port i */ 1891 if (!serial->rx_urb_filled[0]) { 1892 serial->rx_state = RX_SENT; 1893 hso_mux_serial_read(serial); 1894 } else 1895 serial->rx_state = RX_PENDING; 1896 } else { 1897 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1898 i); 1899 } 1900 spin_unlock_irqrestore(&serial->serial_lock, 1901 flags); 1902 } 1903 } 1904 } 1905 /* Resubmit interrupt urb */ 1906 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1907 } 1908 1909 /* called for writing to muxed serial port */ 1910 static int hso_mux_serial_write_data(struct hso_serial *serial) 1911 { 1912 if (NULL == serial) 1913 return -EINVAL; 1914 1915 return mux_device_request(serial, 1916 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1917 serial->parent->port_spec & HSO_PORT_MASK, 1918 serial->tx_urb, 1919 &serial->ctrl_req_tx, 1920 serial->tx_data, serial->tx_data_count); 1921 } 1922 1923 /* write callback for Diag and CS port */ 1924 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1925 { 1926 struct hso_serial *serial = urb->context; 1927 int status = urb->status; 1928 unsigned long flags; 1929 1930 /* sanity check */ 1931 if (!serial) { 1932 hso_dbg(0x1, "serial == NULL\n"); 1933 return; 1934 } 1935 1936 spin_lock_irqsave(&serial->serial_lock, flags); 1937 serial->tx_urb_used = 0; 1938 spin_unlock_irqrestore(&serial->serial_lock, flags); 1939 if (status) { 1940 handle_usb_error(status, __func__, serial->parent); 1941 return; 1942 } 1943 hso_put_activity(serial->parent); 1944 tty_port_tty_wakeup(&serial->port); 1945 hso_kick_transmit(serial); 1946 1947 hso_dbg(0x1, "\n"); 1948 } 1949 1950 /* called for writing diag or CS serial port */ 1951 static int hso_std_serial_write_data(struct hso_serial *serial) 1952 { 1953 int count = serial->tx_data_count; 1954 int result; 1955 1956 usb_fill_bulk_urb(serial->tx_urb, 1957 serial->parent->usb, 1958 usb_sndbulkpipe(serial->parent->usb, 1959 serial->out_endp-> 1960 bEndpointAddress & 0x7F), 1961 serial->tx_data, serial->tx_data_count, 1962 hso_std_serial_write_bulk_callback, serial); 1963 1964 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1965 if (result) { 1966 dev_warn(&serial->parent->usb->dev, 1967 "Failed to submit urb - res %d\n", result); 1968 return result; 1969 } 1970 1971 return count; 1972 } 1973 1974 /* callback after read or write on muxed serial port */ 1975 static void ctrl_callback(struct urb *urb) 1976 { 1977 struct hso_serial *serial = urb->context; 1978 struct usb_ctrlrequest *req; 1979 int status = urb->status; 1980 unsigned long flags; 1981 1982 /* sanity check */ 1983 if (!serial) 1984 return; 1985 1986 spin_lock_irqsave(&serial->serial_lock, flags); 1987 serial->tx_urb_used = 0; 1988 spin_unlock_irqrestore(&serial->serial_lock, flags); 1989 if (status) { 1990 handle_usb_error(status, __func__, serial->parent); 1991 return; 1992 } 1993 1994 /* what request? */ 1995 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1996 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1997 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1998 DUMP1(urb->transfer_buffer, urb->actual_length); 1999 2000 if (req->bRequestType == 2001 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2002 /* response to a read command */ 2003 serial->rx_urb_filled[0] = 1; 2004 spin_lock_irqsave(&serial->serial_lock, flags); 2005 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2006 spin_unlock_irqrestore(&serial->serial_lock, flags); 2007 } else { 2008 hso_put_activity(serial->parent); 2009 tty_port_tty_wakeup(&serial->port); 2010 /* response to a write command */ 2011 hso_kick_transmit(serial); 2012 } 2013 } 2014 2015 /* handle RX data for serial port */ 2016 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2017 { 2018 struct tty_struct *tty; 2019 int count; 2020 2021 /* Sanity check */ 2022 if (urb == NULL || serial == NULL) { 2023 hso_dbg(0x1, "serial = NULL\n"); 2024 return -2; 2025 } 2026 2027 tty = tty_port_tty_get(&serial->port); 2028 2029 if (tty && tty_throttled(tty)) { 2030 tty_kref_put(tty); 2031 return -1; 2032 } 2033 2034 /* Push data to tty */ 2035 hso_dbg(0x1, "data to push to tty\n"); 2036 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2037 if (count >= urb->actual_length) { 2038 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2039 urb->actual_length); 2040 tty_flip_buffer_push(&serial->port); 2041 } else { 2042 dev_warn(&serial->parent->usb->dev, 2043 "dropping data, %d bytes lost\n", urb->actual_length); 2044 } 2045 2046 tty_kref_put(tty); 2047 2048 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2049 2050 return 0; 2051 } 2052 2053 2054 /* Base driver functions */ 2055 2056 static void hso_log_port(struct hso_device *hso_dev) 2057 { 2058 char *port_type; 2059 char port_dev[20]; 2060 2061 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2062 case HSO_PORT_CONTROL: 2063 port_type = "Control"; 2064 break; 2065 case HSO_PORT_APP: 2066 port_type = "Application"; 2067 break; 2068 case HSO_PORT_GPS: 2069 port_type = "GPS"; 2070 break; 2071 case HSO_PORT_GPS_CONTROL: 2072 port_type = "GPS control"; 2073 break; 2074 case HSO_PORT_APP2: 2075 port_type = "Application2"; 2076 break; 2077 case HSO_PORT_PCSC: 2078 port_type = "PCSC"; 2079 break; 2080 case HSO_PORT_DIAG: 2081 port_type = "Diagnostic"; 2082 break; 2083 case HSO_PORT_DIAG2: 2084 port_type = "Diagnostic2"; 2085 break; 2086 case HSO_PORT_MODEM: 2087 port_type = "Modem"; 2088 break; 2089 case HSO_PORT_NETWORK: 2090 port_type = "Network"; 2091 break; 2092 default: 2093 port_type = "Unknown"; 2094 break; 2095 } 2096 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2097 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2098 } else 2099 sprintf(port_dev, "/dev/%s%d", tty_filename, 2100 dev2ser(hso_dev)->minor); 2101 2102 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2103 port_type, port_dev); 2104 } 2105 2106 static int hso_start_net_device(struct hso_device *hso_dev) 2107 { 2108 int i, result = 0; 2109 struct hso_net *hso_net = dev2net(hso_dev); 2110 2111 if (!hso_net) 2112 return -ENODEV; 2113 2114 /* send URBs for all read buffers */ 2115 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2116 2117 /* Prep a receive URB */ 2118 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2119 hso_dev->usb, 2120 usb_rcvbulkpipe(hso_dev->usb, 2121 hso_net->in_endp-> 2122 bEndpointAddress & 0x7F), 2123 hso_net->mux_bulk_rx_buf_pool[i], 2124 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2125 hso_net); 2126 2127 /* Put it out there so the device can send us stuff */ 2128 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2129 GFP_NOIO); 2130 if (result) 2131 dev_warn(&hso_dev->usb->dev, 2132 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2133 i, result); 2134 } 2135 2136 return result; 2137 } 2138 2139 static int hso_stop_net_device(struct hso_device *hso_dev) 2140 { 2141 int i; 2142 struct hso_net *hso_net = dev2net(hso_dev); 2143 2144 if (!hso_net) 2145 return -ENODEV; 2146 2147 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2148 if (hso_net->mux_bulk_rx_urb_pool[i]) 2149 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2150 2151 } 2152 if (hso_net->mux_bulk_tx_urb) 2153 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2154 2155 return 0; 2156 } 2157 2158 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2159 { 2160 int i, result = 0; 2161 struct hso_serial *serial = dev2ser(hso_dev); 2162 2163 if (!serial) 2164 return -ENODEV; 2165 2166 /* If it is not the MUX port fill in and submit a bulk urb (already 2167 * allocated in hso_serial_start) */ 2168 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2169 for (i = 0; i < serial->num_rx_urbs; i++) { 2170 usb_fill_bulk_urb(serial->rx_urb[i], 2171 serial->parent->usb, 2172 usb_rcvbulkpipe(serial->parent->usb, 2173 serial->in_endp-> 2174 bEndpointAddress & 2175 0x7F), 2176 serial->rx_data[i], 2177 serial->rx_data_length, 2178 hso_std_serial_read_bulk_callback, 2179 serial); 2180 result = usb_submit_urb(serial->rx_urb[i], flags); 2181 if (result) { 2182 dev_warn(&serial->parent->usb->dev, 2183 "Failed to submit urb - res %d\n", 2184 result); 2185 break; 2186 } 2187 } 2188 } else { 2189 mutex_lock(&serial->shared_int->shared_int_lock); 2190 if (!serial->shared_int->use_count) { 2191 result = 2192 hso_mux_submit_intr_urb(serial->shared_int, 2193 hso_dev->usb, flags); 2194 } 2195 serial->shared_int->use_count++; 2196 mutex_unlock(&serial->shared_int->shared_int_lock); 2197 } 2198 if (serial->tiocmget) 2199 tiocmget_submit_urb(serial, 2200 serial->tiocmget, 2201 serial->parent->usb); 2202 return result; 2203 } 2204 2205 static int hso_stop_serial_device(struct hso_device *hso_dev) 2206 { 2207 int i; 2208 struct hso_serial *serial = dev2ser(hso_dev); 2209 struct hso_tiocmget *tiocmget; 2210 2211 if (!serial) 2212 return -ENODEV; 2213 2214 for (i = 0; i < serial->num_rx_urbs; i++) { 2215 if (serial->rx_urb[i]) { 2216 usb_kill_urb(serial->rx_urb[i]); 2217 serial->rx_urb_filled[i] = 0; 2218 } 2219 } 2220 serial->curr_rx_urb_idx = 0; 2221 2222 if (serial->tx_urb) 2223 usb_kill_urb(serial->tx_urb); 2224 2225 if (serial->shared_int) { 2226 mutex_lock(&serial->shared_int->shared_int_lock); 2227 if (serial->shared_int->use_count && 2228 (--serial->shared_int->use_count == 0)) { 2229 struct urb *urb; 2230 2231 urb = serial->shared_int->shared_intr_urb; 2232 if (urb) 2233 usb_kill_urb(urb); 2234 } 2235 mutex_unlock(&serial->shared_int->shared_int_lock); 2236 } 2237 tiocmget = serial->tiocmget; 2238 if (tiocmget) { 2239 wake_up_interruptible(&tiocmget->waitq); 2240 usb_kill_urb(tiocmget->urb); 2241 } 2242 2243 return 0; 2244 } 2245 2246 static void hso_serial_tty_unregister(struct hso_serial *serial) 2247 { 2248 tty_unregister_device(tty_drv, serial->minor); 2249 } 2250 2251 static void hso_serial_common_free(struct hso_serial *serial) 2252 { 2253 int i; 2254 2255 for (i = 0; i < serial->num_rx_urbs; i++) { 2256 /* unlink and free RX URB */ 2257 usb_free_urb(serial->rx_urb[i]); 2258 /* free the RX buffer */ 2259 kfree(serial->rx_data[i]); 2260 } 2261 2262 /* unlink and free TX URB */ 2263 usb_free_urb(serial->tx_urb); 2264 kfree(serial->tx_buffer); 2265 kfree(serial->tx_data); 2266 tty_port_destroy(&serial->port); 2267 } 2268 2269 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2270 int rx_size, int tx_size) 2271 { 2272 int minor; 2273 int i; 2274 2275 tty_port_init(&serial->port); 2276 2277 minor = get_free_serial_index(); 2278 if (minor < 0) 2279 goto exit; 2280 2281 /* register our minor number */ 2282 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2283 tty_drv, minor, &serial->parent->interface->dev, 2284 serial->parent, hso_serial_dev_groups); 2285 2286 /* fill in specific data for later use */ 2287 serial->minor = minor; 2288 serial->magic = HSO_SERIAL_MAGIC; 2289 spin_lock_init(&serial->serial_lock); 2290 serial->num_rx_urbs = num_urbs; 2291 2292 /* RX, allocate urb and initialize */ 2293 2294 /* prepare our RX buffer */ 2295 serial->rx_data_length = rx_size; 2296 for (i = 0; i < serial->num_rx_urbs; i++) { 2297 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2298 if (!serial->rx_urb[i]) 2299 goto exit; 2300 serial->rx_urb[i]->transfer_buffer = NULL; 2301 serial->rx_urb[i]->transfer_buffer_length = 0; 2302 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2303 GFP_KERNEL); 2304 if (!serial->rx_data[i]) 2305 goto exit; 2306 } 2307 2308 /* TX, allocate urb and initialize */ 2309 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2310 if (!serial->tx_urb) 2311 goto exit; 2312 serial->tx_urb->transfer_buffer = NULL; 2313 serial->tx_urb->transfer_buffer_length = 0; 2314 /* prepare our TX buffer */ 2315 serial->tx_data_count = 0; 2316 serial->tx_buffer_count = 0; 2317 serial->tx_data_length = tx_size; 2318 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2319 if (!serial->tx_data) 2320 goto exit; 2321 2322 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2323 if (!serial->tx_buffer) 2324 goto exit; 2325 2326 return 0; 2327 exit: 2328 hso_serial_tty_unregister(serial); 2329 hso_serial_common_free(serial); 2330 return -1; 2331 } 2332 2333 /* Creates a general hso device */ 2334 static struct hso_device *hso_create_device(struct usb_interface *intf, 2335 int port_spec) 2336 { 2337 struct hso_device *hso_dev; 2338 2339 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2340 if (!hso_dev) 2341 return NULL; 2342 2343 hso_dev->port_spec = port_spec; 2344 hso_dev->usb = interface_to_usbdev(intf); 2345 hso_dev->interface = intf; 2346 kref_init(&hso_dev->ref); 2347 mutex_init(&hso_dev->mutex); 2348 2349 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2350 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2351 2352 return hso_dev; 2353 } 2354 2355 /* Removes a network device in the network device table */ 2356 static int remove_net_device(struct hso_device *hso_dev) 2357 { 2358 int i; 2359 2360 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2361 if (network_table[i] == hso_dev) { 2362 network_table[i] = NULL; 2363 break; 2364 } 2365 } 2366 if (i == HSO_MAX_NET_DEVICES) 2367 return -1; 2368 return 0; 2369 } 2370 2371 /* Frees our network device */ 2372 static void hso_free_net_device(struct hso_device *hso_dev) 2373 { 2374 int i; 2375 struct hso_net *hso_net = dev2net(hso_dev); 2376 2377 if (!hso_net) 2378 return; 2379 2380 remove_net_device(hso_net->parent); 2381 2382 if (hso_net->net) 2383 unregister_netdev(hso_net->net); 2384 2385 /* start freeing */ 2386 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2387 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2388 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2389 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2390 } 2391 usb_free_urb(hso_net->mux_bulk_tx_urb); 2392 kfree(hso_net->mux_bulk_tx_buf); 2393 hso_net->mux_bulk_tx_buf = NULL; 2394 2395 if (hso_net->net) 2396 free_netdev(hso_net->net); 2397 2398 kfree(hso_dev); 2399 } 2400 2401 static const struct net_device_ops hso_netdev_ops = { 2402 .ndo_open = hso_net_open, 2403 .ndo_stop = hso_net_close, 2404 .ndo_start_xmit = hso_net_start_xmit, 2405 .ndo_tx_timeout = hso_net_tx_timeout, 2406 }; 2407 2408 /* initialize the network interface */ 2409 static void hso_net_init(struct net_device *net) 2410 { 2411 struct hso_net *hso_net = netdev_priv(net); 2412 2413 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2414 2415 /* fill in the other fields */ 2416 net->netdev_ops = &hso_netdev_ops; 2417 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2418 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2419 net->type = ARPHRD_NONE; 2420 net->mtu = DEFAULT_MTU - 14; 2421 net->tx_queue_len = 10; 2422 net->ethtool_ops = &ops; 2423 2424 /* and initialize the semaphore */ 2425 spin_lock_init(&hso_net->net_lock); 2426 } 2427 2428 /* Adds a network device in the network device table */ 2429 static int add_net_device(struct hso_device *hso_dev) 2430 { 2431 int i; 2432 2433 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2434 if (network_table[i] == NULL) { 2435 network_table[i] = hso_dev; 2436 break; 2437 } 2438 } 2439 if (i == HSO_MAX_NET_DEVICES) 2440 return -1; 2441 return 0; 2442 } 2443 2444 static int hso_rfkill_set_block(void *data, bool blocked) 2445 { 2446 struct hso_device *hso_dev = data; 2447 int enabled = !blocked; 2448 int rv; 2449 2450 mutex_lock(&hso_dev->mutex); 2451 if (hso_dev->usb_gone) 2452 rv = 0; 2453 else 2454 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2455 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2456 USB_CTRL_SET_TIMEOUT); 2457 mutex_unlock(&hso_dev->mutex); 2458 return rv; 2459 } 2460 2461 static const struct rfkill_ops hso_rfkill_ops = { 2462 .set_block = hso_rfkill_set_block, 2463 }; 2464 2465 /* Creates and sets up everything for rfkill */ 2466 static void hso_create_rfkill(struct hso_device *hso_dev, 2467 struct usb_interface *interface) 2468 { 2469 struct hso_net *hso_net = dev2net(hso_dev); 2470 struct device *dev = &hso_net->net->dev; 2471 static u32 rfkill_counter; 2472 2473 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2474 rfkill_counter++); 2475 2476 hso_net->rfkill = rfkill_alloc(hso_net->name, 2477 &interface_to_usbdev(interface)->dev, 2478 RFKILL_TYPE_WWAN, 2479 &hso_rfkill_ops, hso_dev); 2480 if (!hso_net->rfkill) { 2481 dev_err(dev, "%s - Out of memory\n", __func__); 2482 return; 2483 } 2484 if (rfkill_register(hso_net->rfkill) < 0) { 2485 rfkill_destroy(hso_net->rfkill); 2486 hso_net->rfkill = NULL; 2487 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2488 return; 2489 } 2490 } 2491 2492 static struct device_type hso_type = { 2493 .name = "wwan", 2494 }; 2495 2496 /* Creates our network device */ 2497 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2498 int port_spec) 2499 { 2500 int result, i; 2501 struct net_device *net; 2502 struct hso_net *hso_net; 2503 struct hso_device *hso_dev; 2504 2505 hso_dev = hso_create_device(interface, port_spec); 2506 if (!hso_dev) 2507 return NULL; 2508 2509 /* allocate our network device, then we can put in our private data */ 2510 /* call hso_net_init to do the basic initialization */ 2511 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2512 hso_net_init); 2513 if (!net) { 2514 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2515 goto exit; 2516 } 2517 2518 hso_net = netdev_priv(net); 2519 2520 hso_dev->port_data.dev_net = hso_net; 2521 hso_net->net = net; 2522 hso_net->parent = hso_dev; 2523 2524 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2525 USB_DIR_IN); 2526 if (!hso_net->in_endp) { 2527 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2528 goto exit; 2529 } 2530 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2531 USB_DIR_OUT); 2532 if (!hso_net->out_endp) { 2533 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2534 goto exit; 2535 } 2536 SET_NETDEV_DEV(net, &interface->dev); 2537 SET_NETDEV_DEVTYPE(net, &hso_type); 2538 2539 /* start allocating */ 2540 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2541 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2542 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2543 goto exit; 2544 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2545 GFP_KERNEL); 2546 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2547 goto exit; 2548 } 2549 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2550 if (!hso_net->mux_bulk_tx_urb) 2551 goto exit; 2552 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2553 if (!hso_net->mux_bulk_tx_buf) 2554 goto exit; 2555 2556 add_net_device(hso_dev); 2557 2558 /* registering our net device */ 2559 result = register_netdev(net); 2560 if (result) { 2561 dev_err(&interface->dev, "Failed to register device\n"); 2562 goto exit; 2563 } 2564 2565 hso_log_port(hso_dev); 2566 2567 hso_create_rfkill(hso_dev, interface); 2568 2569 return hso_dev; 2570 exit: 2571 hso_free_net_device(hso_dev); 2572 return NULL; 2573 } 2574 2575 static void hso_free_tiomget(struct hso_serial *serial) 2576 { 2577 struct hso_tiocmget *tiocmget; 2578 if (!serial) 2579 return; 2580 tiocmget = serial->tiocmget; 2581 if (tiocmget) { 2582 usb_free_urb(tiocmget->urb); 2583 tiocmget->urb = NULL; 2584 serial->tiocmget = NULL; 2585 kfree(tiocmget); 2586 } 2587 } 2588 2589 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2590 static void hso_free_serial_device(struct hso_device *hso_dev) 2591 { 2592 struct hso_serial *serial = dev2ser(hso_dev); 2593 2594 if (!serial) 2595 return; 2596 2597 hso_serial_common_free(serial); 2598 2599 if (serial->shared_int) { 2600 mutex_lock(&serial->shared_int->shared_int_lock); 2601 if (--serial->shared_int->ref_count == 0) 2602 hso_free_shared_int(serial->shared_int); 2603 else 2604 mutex_unlock(&serial->shared_int->shared_int_lock); 2605 } 2606 hso_free_tiomget(serial); 2607 kfree(serial); 2608 kfree(hso_dev); 2609 } 2610 2611 /* Creates a bulk AT channel */ 2612 static struct hso_device *hso_create_bulk_serial_device( 2613 struct usb_interface *interface, int port) 2614 { 2615 struct hso_device *hso_dev; 2616 struct hso_serial *serial; 2617 int num_urbs; 2618 struct hso_tiocmget *tiocmget; 2619 2620 hso_dev = hso_create_device(interface, port); 2621 if (!hso_dev) 2622 return NULL; 2623 2624 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2625 if (!serial) 2626 goto exit; 2627 2628 serial->parent = hso_dev; 2629 hso_dev->port_data.dev_serial = serial; 2630 2631 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2632 num_urbs = 2; 2633 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2634 GFP_KERNEL); 2635 /* it isn't going to break our heart if serial->tiocmget 2636 * allocation fails don't bother checking this. 2637 */ 2638 if (serial->tiocmget) { 2639 tiocmget = serial->tiocmget; 2640 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2641 if (tiocmget->urb) { 2642 mutex_init(&tiocmget->mutex); 2643 init_waitqueue_head(&tiocmget->waitq); 2644 tiocmget->endp = hso_get_ep( 2645 interface, 2646 USB_ENDPOINT_XFER_INT, 2647 USB_DIR_IN); 2648 } else 2649 hso_free_tiomget(serial); 2650 } 2651 } 2652 else 2653 num_urbs = 1; 2654 2655 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2656 BULK_URB_TX_SIZE)) 2657 goto exit; 2658 2659 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2660 USB_DIR_IN); 2661 if (!serial->in_endp) { 2662 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2663 goto exit2; 2664 } 2665 2666 if (! 2667 (serial->out_endp = 2668 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2669 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2670 goto exit2; 2671 } 2672 2673 serial->write_data = hso_std_serial_write_data; 2674 2675 /* and record this serial */ 2676 set_serial_by_index(serial->minor, serial); 2677 2678 /* setup the proc dirs and files if needed */ 2679 hso_log_port(hso_dev); 2680 2681 /* done, return it */ 2682 return hso_dev; 2683 2684 exit2: 2685 hso_serial_tty_unregister(serial); 2686 hso_serial_common_free(serial); 2687 exit: 2688 hso_free_tiomget(serial); 2689 kfree(serial); 2690 kfree(hso_dev); 2691 return NULL; 2692 } 2693 2694 /* Creates a multiplexed AT channel */ 2695 static 2696 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2697 int port, 2698 struct hso_shared_int *mux) 2699 { 2700 struct hso_device *hso_dev; 2701 struct hso_serial *serial; 2702 int port_spec; 2703 2704 port_spec = HSO_INTF_MUX; 2705 port_spec &= ~HSO_PORT_MASK; 2706 2707 port_spec |= hso_mux_to_port(port); 2708 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2709 return NULL; 2710 2711 hso_dev = hso_create_device(interface, port_spec); 2712 if (!hso_dev) 2713 return NULL; 2714 2715 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2716 if (!serial) 2717 goto exit; 2718 2719 hso_dev->port_data.dev_serial = serial; 2720 serial->parent = hso_dev; 2721 2722 if (hso_serial_common_create 2723 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2724 goto exit; 2725 2726 serial->tx_data_length--; 2727 serial->write_data = hso_mux_serial_write_data; 2728 2729 serial->shared_int = mux; 2730 mutex_lock(&serial->shared_int->shared_int_lock); 2731 serial->shared_int->ref_count++; 2732 mutex_unlock(&serial->shared_int->shared_int_lock); 2733 2734 /* and record this serial */ 2735 set_serial_by_index(serial->minor, serial); 2736 2737 /* setup the proc dirs and files if needed */ 2738 hso_log_port(hso_dev); 2739 2740 /* done, return it */ 2741 return hso_dev; 2742 2743 exit: 2744 if (serial) { 2745 tty_unregister_device(tty_drv, serial->minor); 2746 kfree(serial); 2747 } 2748 kfree(hso_dev); 2749 return NULL; 2750 2751 } 2752 2753 static void hso_free_shared_int(struct hso_shared_int *mux) 2754 { 2755 usb_free_urb(mux->shared_intr_urb); 2756 kfree(mux->shared_intr_buf); 2757 mutex_unlock(&mux->shared_int_lock); 2758 kfree(mux); 2759 } 2760 2761 static 2762 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2763 { 2764 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2765 2766 if (!mux) 2767 return NULL; 2768 2769 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2770 USB_DIR_IN); 2771 if (!mux->intr_endp) { 2772 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2773 goto exit; 2774 } 2775 2776 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2777 if (!mux->shared_intr_urb) 2778 goto exit; 2779 mux->shared_intr_buf = 2780 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2781 GFP_KERNEL); 2782 if (!mux->shared_intr_buf) 2783 goto exit; 2784 2785 mutex_init(&mux->shared_int_lock); 2786 2787 return mux; 2788 2789 exit: 2790 kfree(mux->shared_intr_buf); 2791 usb_free_urb(mux->shared_intr_urb); 2792 kfree(mux); 2793 return NULL; 2794 } 2795 2796 /* Gets the port spec for a certain interface */ 2797 static int hso_get_config_data(struct usb_interface *interface) 2798 { 2799 struct usb_device *usbdev = interface_to_usbdev(interface); 2800 u8 *config_data = kmalloc(17, GFP_KERNEL); 2801 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2802 s32 result; 2803 2804 if (!config_data) 2805 return -ENOMEM; 2806 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2807 0x86, 0xC0, 0, 0, config_data, 17, 2808 USB_CTRL_SET_TIMEOUT) != 0x11) { 2809 kfree(config_data); 2810 return -EIO; 2811 } 2812 2813 switch (config_data[if_num]) { 2814 case 0x0: 2815 result = 0; 2816 break; 2817 case 0x1: 2818 result = HSO_PORT_DIAG; 2819 break; 2820 case 0x2: 2821 result = HSO_PORT_GPS; 2822 break; 2823 case 0x3: 2824 result = HSO_PORT_GPS_CONTROL; 2825 break; 2826 case 0x4: 2827 result = HSO_PORT_APP; 2828 break; 2829 case 0x5: 2830 result = HSO_PORT_APP2; 2831 break; 2832 case 0x6: 2833 result = HSO_PORT_CONTROL; 2834 break; 2835 case 0x7: 2836 result = HSO_PORT_NETWORK; 2837 break; 2838 case 0x8: 2839 result = HSO_PORT_MODEM; 2840 break; 2841 case 0x9: 2842 result = HSO_PORT_MSD; 2843 break; 2844 case 0xa: 2845 result = HSO_PORT_PCSC; 2846 break; 2847 case 0xb: 2848 result = HSO_PORT_VOICE; 2849 break; 2850 default: 2851 result = 0; 2852 } 2853 2854 if (result) 2855 result |= HSO_INTF_BULK; 2856 2857 if (config_data[16] & 0x1) 2858 result |= HSO_INFO_CRC_BUG; 2859 2860 kfree(config_data); 2861 return result; 2862 } 2863 2864 /* called once for each interface upon device insertion */ 2865 static int hso_probe(struct usb_interface *interface, 2866 const struct usb_device_id *id) 2867 { 2868 int mux, i, if_num, port_spec; 2869 unsigned char port_mask; 2870 struct hso_device *hso_dev = NULL; 2871 struct hso_shared_int *shared_int; 2872 struct hso_device *tmp_dev = NULL; 2873 2874 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2875 dev_err(&interface->dev, "Not our interface\n"); 2876 return -ENODEV; 2877 } 2878 2879 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2880 2881 /* Get the interface/port specification from either driver_info or from 2882 * the device itself */ 2883 if (id->driver_info) 2884 port_spec = ((u32 *)(id->driver_info))[if_num]; 2885 else 2886 port_spec = hso_get_config_data(interface); 2887 2888 /* Check if we need to switch to alt interfaces prior to port 2889 * configuration */ 2890 if (interface->num_altsetting > 1) 2891 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2892 interface->needs_remote_wakeup = 1; 2893 2894 /* Allocate new hso device(s) */ 2895 switch (port_spec & HSO_INTF_MASK) { 2896 case HSO_INTF_MUX: 2897 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2898 /* Create the network device */ 2899 if (!disable_net) { 2900 hso_dev = hso_create_net_device(interface, 2901 port_spec); 2902 if (!hso_dev) 2903 goto exit; 2904 tmp_dev = hso_dev; 2905 } 2906 } 2907 2908 if (hso_get_mux_ports(interface, &port_mask)) 2909 /* TODO: de-allocate everything */ 2910 goto exit; 2911 2912 shared_int = hso_create_shared_int(interface); 2913 if (!shared_int) 2914 goto exit; 2915 2916 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2917 if (port_mask & i) { 2918 hso_dev = hso_create_mux_serial_device( 2919 interface, i, shared_int); 2920 if (!hso_dev) 2921 goto exit; 2922 } 2923 } 2924 2925 if (tmp_dev) 2926 hso_dev = tmp_dev; 2927 break; 2928 2929 case HSO_INTF_BULK: 2930 /* It's a regular bulk interface */ 2931 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2932 if (!disable_net) 2933 hso_dev = 2934 hso_create_net_device(interface, port_spec); 2935 } else { 2936 hso_dev = 2937 hso_create_bulk_serial_device(interface, port_spec); 2938 } 2939 if (!hso_dev) 2940 goto exit; 2941 break; 2942 default: 2943 goto exit; 2944 } 2945 2946 /* save our data pointer in this device */ 2947 usb_set_intfdata(interface, hso_dev); 2948 2949 /* done */ 2950 return 0; 2951 exit: 2952 hso_free_interface(interface); 2953 return -ENODEV; 2954 } 2955 2956 /* device removed, cleaning up */ 2957 static void hso_disconnect(struct usb_interface *interface) 2958 { 2959 hso_free_interface(interface); 2960 2961 /* remove reference of our private data */ 2962 usb_set_intfdata(interface, NULL); 2963 } 2964 2965 static void async_get_intf(struct work_struct *data) 2966 { 2967 struct hso_device *hso_dev = 2968 container_of(data, struct hso_device, async_get_intf); 2969 usb_autopm_get_interface(hso_dev->interface); 2970 } 2971 2972 static void async_put_intf(struct work_struct *data) 2973 { 2974 struct hso_device *hso_dev = 2975 container_of(data, struct hso_device, async_put_intf); 2976 usb_autopm_put_interface(hso_dev->interface); 2977 } 2978 2979 static int hso_get_activity(struct hso_device *hso_dev) 2980 { 2981 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2982 if (!hso_dev->is_active) { 2983 hso_dev->is_active = 1; 2984 schedule_work(&hso_dev->async_get_intf); 2985 } 2986 } 2987 2988 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2989 return -EAGAIN; 2990 2991 usb_mark_last_busy(hso_dev->usb); 2992 2993 return 0; 2994 } 2995 2996 static int hso_put_activity(struct hso_device *hso_dev) 2997 { 2998 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2999 if (hso_dev->is_active) { 3000 hso_dev->is_active = 0; 3001 schedule_work(&hso_dev->async_put_intf); 3002 return -EAGAIN; 3003 } 3004 } 3005 hso_dev->is_active = 0; 3006 return 0; 3007 } 3008 3009 /* called by kernel when we need to suspend device */ 3010 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3011 { 3012 int i, result; 3013 3014 /* Stop all serial ports */ 3015 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3016 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3017 result = hso_stop_serial_device(serial_table[i]); 3018 if (result) 3019 goto out; 3020 } 3021 } 3022 3023 /* Stop all network ports */ 3024 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3025 if (network_table[i] && 3026 (network_table[i]->interface == iface)) { 3027 result = hso_stop_net_device(network_table[i]); 3028 if (result) 3029 goto out; 3030 } 3031 } 3032 3033 out: 3034 return 0; 3035 } 3036 3037 /* called by kernel when we need to resume device */ 3038 static int hso_resume(struct usb_interface *iface) 3039 { 3040 int i, result = 0; 3041 struct hso_net *hso_net; 3042 3043 /* Start all serial ports */ 3044 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3045 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3046 if (dev2ser(serial_table[i])->port.count) { 3047 result = 3048 hso_start_serial_device(serial_table[i], GFP_NOIO); 3049 hso_kick_transmit(dev2ser(serial_table[i])); 3050 if (result) 3051 goto out; 3052 } 3053 } 3054 } 3055 3056 /* Start all network ports */ 3057 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3058 if (network_table[i] && 3059 (network_table[i]->interface == iface)) { 3060 hso_net = dev2net(network_table[i]); 3061 if (hso_net->flags & IFF_UP) { 3062 /* First transmit any lingering data, 3063 then restart the device. */ 3064 if (hso_net->skb_tx_buf) { 3065 dev_dbg(&iface->dev, 3066 "Transmitting" 3067 " lingering data\n"); 3068 hso_net_start_xmit(hso_net->skb_tx_buf, 3069 hso_net->net); 3070 hso_net->skb_tx_buf = NULL; 3071 } 3072 result = hso_start_net_device(network_table[i]); 3073 if (result) 3074 goto out; 3075 } 3076 } 3077 } 3078 3079 out: 3080 return result; 3081 } 3082 3083 static void hso_serial_ref_free(struct kref *ref) 3084 { 3085 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3086 3087 hso_free_serial_device(hso_dev); 3088 } 3089 3090 static void hso_free_interface(struct usb_interface *interface) 3091 { 3092 struct hso_serial *serial; 3093 int i; 3094 3095 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3096 if (serial_table[i] && 3097 (serial_table[i]->interface == interface)) { 3098 serial = dev2ser(serial_table[i]); 3099 tty_port_tty_hangup(&serial->port, false); 3100 mutex_lock(&serial->parent->mutex); 3101 serial->parent->usb_gone = 1; 3102 mutex_unlock(&serial->parent->mutex); 3103 cancel_work_sync(&serial_table[i]->async_put_intf); 3104 cancel_work_sync(&serial_table[i]->async_get_intf); 3105 hso_serial_tty_unregister(serial); 3106 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3107 set_serial_by_index(i, NULL); 3108 } 3109 } 3110 3111 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3112 if (network_table[i] && 3113 (network_table[i]->interface == interface)) { 3114 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3115 /* hso_stop_net_device doesn't stop the net queue since 3116 * traffic needs to start it again when suspended */ 3117 netif_stop_queue(dev2net(network_table[i])->net); 3118 hso_stop_net_device(network_table[i]); 3119 cancel_work_sync(&network_table[i]->async_put_intf); 3120 cancel_work_sync(&network_table[i]->async_get_intf); 3121 if (rfk) { 3122 rfkill_unregister(rfk); 3123 rfkill_destroy(rfk); 3124 } 3125 hso_free_net_device(network_table[i]); 3126 } 3127 } 3128 } 3129 3130 /* Helper functions */ 3131 3132 /* Get the endpoint ! */ 3133 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3134 int type, int dir) 3135 { 3136 int i; 3137 struct usb_host_interface *iface = intf->cur_altsetting; 3138 struct usb_endpoint_descriptor *endp; 3139 3140 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3141 endp = &iface->endpoint[i].desc; 3142 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3143 (usb_endpoint_type(endp) == type)) 3144 return endp; 3145 } 3146 3147 return NULL; 3148 } 3149 3150 /* Get the byte that describes which ports are enabled */ 3151 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3152 { 3153 int i; 3154 struct usb_host_interface *iface = intf->cur_altsetting; 3155 3156 if (iface->extralen == 3) { 3157 *ports = iface->extra[2]; 3158 return 0; 3159 } 3160 3161 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3162 if (iface->endpoint[i].extralen == 3) { 3163 *ports = iface->endpoint[i].extra[2]; 3164 return 0; 3165 } 3166 } 3167 3168 return -1; 3169 } 3170 3171 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3172 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3173 struct usb_device *usb, gfp_t gfp) 3174 { 3175 int result; 3176 3177 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3178 usb_rcvintpipe(usb, 3179 shared_int->intr_endp->bEndpointAddress & 0x7F), 3180 shared_int->shared_intr_buf, 3181 1, 3182 intr_callback, shared_int, 3183 shared_int->intr_endp->bInterval); 3184 3185 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3186 if (result) 3187 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3188 result); 3189 3190 return result; 3191 } 3192 3193 /* operations setup of the serial interface */ 3194 static const struct tty_operations hso_serial_ops = { 3195 .open = hso_serial_open, 3196 .close = hso_serial_close, 3197 .write = hso_serial_write, 3198 .write_room = hso_serial_write_room, 3199 .cleanup = hso_serial_cleanup, 3200 .ioctl = hso_serial_ioctl, 3201 .set_termios = hso_serial_set_termios, 3202 .chars_in_buffer = hso_serial_chars_in_buffer, 3203 .tiocmget = hso_serial_tiocmget, 3204 .tiocmset = hso_serial_tiocmset, 3205 .get_icount = hso_get_count, 3206 .unthrottle = hso_unthrottle 3207 }; 3208 3209 static struct usb_driver hso_driver = { 3210 .name = driver_name, 3211 .probe = hso_probe, 3212 .disconnect = hso_disconnect, 3213 .id_table = hso_ids, 3214 .suspend = hso_suspend, 3215 .resume = hso_resume, 3216 .reset_resume = hso_resume, 3217 .supports_autosuspend = 1, 3218 .disable_hub_initiated_lpm = 1, 3219 }; 3220 3221 static int __init hso_init(void) 3222 { 3223 int i; 3224 int result; 3225 3226 /* put it in the log */ 3227 pr_info("%s\n", version); 3228 3229 /* Initialise the serial table semaphore and table */ 3230 spin_lock_init(&serial_table_lock); 3231 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3232 serial_table[i] = NULL; 3233 3234 /* allocate our driver using the proper amount of supported minors */ 3235 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3236 if (!tty_drv) 3237 return -ENOMEM; 3238 3239 /* fill in all needed values */ 3240 tty_drv->driver_name = driver_name; 3241 tty_drv->name = tty_filename; 3242 3243 /* if major number is provided as parameter, use that one */ 3244 if (tty_major) 3245 tty_drv->major = tty_major; 3246 3247 tty_drv->minor_start = 0; 3248 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3249 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3250 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3251 tty_drv->init_termios = tty_std_termios; 3252 hso_init_termios(&tty_drv->init_termios); 3253 tty_set_operations(tty_drv, &hso_serial_ops); 3254 3255 /* register the tty driver */ 3256 result = tty_register_driver(tty_drv); 3257 if (result) { 3258 pr_err("%s - tty_register_driver failed(%d)\n", 3259 __func__, result); 3260 goto err_free_tty; 3261 } 3262 3263 /* register this module as an usb driver */ 3264 result = usb_register(&hso_driver); 3265 if (result) { 3266 pr_err("Could not register hso driver - error: %d\n", result); 3267 goto err_unreg_tty; 3268 } 3269 3270 /* done */ 3271 return 0; 3272 err_unreg_tty: 3273 tty_unregister_driver(tty_drv); 3274 err_free_tty: 3275 put_tty_driver(tty_drv); 3276 return result; 3277 } 3278 3279 static void __exit hso_exit(void) 3280 { 3281 pr_info("unloaded\n"); 3282 3283 tty_unregister_driver(tty_drv); 3284 /* deregister the usb driver */ 3285 usb_deregister(&hso_driver); 3286 put_tty_driver(tty_drv); 3287 } 3288 3289 /* Module definitions */ 3290 module_init(hso_init); 3291 module_exit(hso_exit); 3292 3293 MODULE_AUTHOR(MOD_AUTHOR); 3294 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3295 MODULE_LICENSE("GPL"); 3296 3297 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3298 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3299 module_param(debug, int, 0644); 3300 3301 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3302 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3303 module_param(tty_major, int, 0644); 3304 3305 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3306 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3307 module_param(disable_net, int, 0644); 3308