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 #include <linux/sched.h> 54 #include <linux/slab.h> 55 #include <linux/init.h> 56 #include <linux/delay.h> 57 #include <linux/netdevice.h> 58 #include <linux/module.h> 59 #include <linux/ethtool.h> 60 #include <linux/usb.h> 61 #include <linux/timer.h> 62 #include <linux/tty.h> 63 #include <linux/tty_driver.h> 64 #include <linux/tty_flip.h> 65 #include <linux/kmod.h> 66 #include <linux/rfkill.h> 67 #include <linux/ip.h> 68 #include <linux/uaccess.h> 69 #include <linux/usb/cdc.h> 70 #include <net/arp.h> 71 #include <asm/byteorder.h> 72 #include <linux/serial_core.h> 73 #include <linux/serial.h> 74 75 76 #define MOD_AUTHOR "Option Wireless" 77 #define MOD_DESCRIPTION "USB High Speed Option driver" 78 #define MOD_LICENSE "GPL" 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 D__(lvl_, fmt, arg...) \ 113 do { \ 114 printk(lvl_ "[%d:%s]: " fmt "\n", \ 115 __LINE__, __func__, ## arg); \ 116 } while (0) 117 118 #define D_(lvl, args...) \ 119 do { \ 120 if (lvl & debug) \ 121 D__(KERN_INFO, args); \ 122 } while (0) 123 124 #define D1(args...) D_(0x01, ##args) 125 #define D2(args...) D_(0x02, ##args) 126 #define D3(args...) D_(0x04, ##args) 127 #define D4(args...) D_(0x08, ##args) 128 #define D5(args...) D_(0x10, ##args) 129 130 /*****************************************************************************/ 131 /* Enumerators */ 132 /*****************************************************************************/ 133 enum pkt_parse_state { 134 WAIT_IP, 135 WAIT_DATA, 136 WAIT_SYNC 137 }; 138 139 /*****************************************************************************/ 140 /* Structs */ 141 /*****************************************************************************/ 142 143 struct hso_shared_int { 144 struct usb_endpoint_descriptor *intr_endp; 145 void *shared_intr_buf; 146 struct urb *shared_intr_urb; 147 struct usb_device *usb; 148 int use_count; 149 int ref_count; 150 struct mutex shared_int_lock; 151 }; 152 153 struct hso_net { 154 struct hso_device *parent; 155 struct net_device *net; 156 struct rfkill *rfkill; 157 158 struct usb_endpoint_descriptor *in_endp; 159 struct usb_endpoint_descriptor *out_endp; 160 161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 162 struct urb *mux_bulk_tx_urb; 163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 164 void *mux_bulk_tx_buf; 165 166 struct sk_buff *skb_rx_buf; 167 struct sk_buff *skb_tx_buf; 168 169 enum pkt_parse_state rx_parse_state; 170 spinlock_t net_lock; 171 172 unsigned short rx_buf_size; 173 unsigned short rx_buf_missing; 174 struct iphdr rx_ip_hdr; 175 176 unsigned long flags; 177 }; 178 179 enum rx_ctrl_state{ 180 RX_IDLE, 181 RX_SENT, 182 RX_PENDING 183 }; 184 185 #define BM_REQUEST_TYPE (0xa1) 186 #define B_NOTIFICATION (0x20) 187 #define W_VALUE (0x0) 188 #define W_INDEX (0x2) 189 #define W_LENGTH (0x2) 190 191 #define B_OVERRUN (0x1<<6) 192 #define B_PARITY (0x1<<5) 193 #define B_FRAMING (0x1<<4) 194 #define B_RING_SIGNAL (0x1<<3) 195 #define B_BREAK (0x1<<2) 196 #define B_TX_CARRIER (0x1<<1) 197 #define B_RX_CARRIER (0x1<<0) 198 199 struct hso_serial_state_notification { 200 u8 bmRequestType; 201 u8 bNotification; 202 u16 wValue; 203 u16 wIndex; 204 u16 wLength; 205 u16 UART_state_bitmap; 206 } __packed; 207 208 struct hso_tiocmget { 209 struct mutex mutex; 210 wait_queue_head_t waitq; 211 int intr_completed; 212 struct usb_endpoint_descriptor *endp; 213 struct urb *urb; 214 struct hso_serial_state_notification serial_state_notification; 215 u16 prev_UART_state_bitmap; 216 struct uart_icount icount; 217 }; 218 219 220 struct hso_serial { 221 struct hso_device *parent; 222 int magic; 223 u8 minor; 224 225 struct hso_shared_int *shared_int; 226 227 /* rx/tx urb could be either a bulk urb or a control urb depending 228 on which serial port it is used on. */ 229 struct urb *rx_urb[MAX_RX_URBS]; 230 u8 num_rx_urbs; 231 u8 *rx_data[MAX_RX_URBS]; 232 u16 rx_data_length; /* should contain allocated length */ 233 234 struct urb *tx_urb; 235 u8 *tx_data; 236 u8 *tx_buffer; 237 u16 tx_data_length; /* should contain allocated length */ 238 u16 tx_data_count; 239 u16 tx_buffer_count; 240 struct usb_ctrlrequest ctrl_req_tx; 241 struct usb_ctrlrequest ctrl_req_rx; 242 243 struct usb_endpoint_descriptor *in_endp; 244 struct usb_endpoint_descriptor *out_endp; 245 246 enum rx_ctrl_state rx_state; 247 u8 rts_state; 248 u8 dtr_state; 249 unsigned tx_urb_used:1; 250 251 struct tty_port port; 252 /* from usb_serial_port */ 253 spinlock_t serial_lock; 254 255 int (*write_data) (struct hso_serial *serial); 256 struct hso_tiocmget *tiocmget; 257 /* Hacks required to get flow control 258 * working on the serial receive buffers 259 * so as not to drop characters on the floor. 260 */ 261 int curr_rx_urb_idx; 262 u16 curr_rx_urb_offset; 263 u8 rx_urb_filled[MAX_RX_URBS]; 264 struct tasklet_struct unthrottle_tasklet; 265 struct work_struct retry_unthrottle_workqueue; 266 }; 267 268 struct hso_device { 269 union { 270 struct hso_serial *dev_serial; 271 struct hso_net *dev_net; 272 } port_data; 273 274 u32 port_spec; 275 276 u8 is_active; 277 u8 usb_gone; 278 struct work_struct async_get_intf; 279 struct work_struct async_put_intf; 280 struct work_struct reset_device; 281 282 struct usb_device *usb; 283 struct usb_interface *interface; 284 285 struct device *dev; 286 struct kref ref; 287 struct mutex mutex; 288 }; 289 290 /* Type of interface */ 291 #define HSO_INTF_MASK 0xFF00 292 #define HSO_INTF_MUX 0x0100 293 #define HSO_INTF_BULK 0x0200 294 295 /* Type of port */ 296 #define HSO_PORT_MASK 0xFF 297 #define HSO_PORT_NO_PORT 0x0 298 #define HSO_PORT_CONTROL 0x1 299 #define HSO_PORT_APP 0x2 300 #define HSO_PORT_GPS 0x3 301 #define HSO_PORT_PCSC 0x4 302 #define HSO_PORT_APP2 0x5 303 #define HSO_PORT_GPS_CONTROL 0x6 304 #define HSO_PORT_MSD 0x7 305 #define HSO_PORT_VOICE 0x8 306 #define HSO_PORT_DIAG2 0x9 307 #define HSO_PORT_DIAG 0x10 308 #define HSO_PORT_MODEM 0x11 309 #define HSO_PORT_NETWORK 0x12 310 311 /* Additional device info */ 312 #define HSO_INFO_MASK 0xFF000000 313 #define HSO_INFO_CRC_BUG 0x01000000 314 315 /*****************************************************************************/ 316 /* Prototypes */ 317 /*****************************************************************************/ 318 /* Serial driver functions */ 319 static int hso_serial_tiocmset(struct tty_struct *tty, 320 unsigned int set, unsigned int clear); 321 static void ctrl_callback(struct urb *urb); 322 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 323 static void hso_kick_transmit(struct hso_serial *serial); 324 /* Helper functions */ 325 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 326 struct usb_device *usb, gfp_t gfp); 327 static void handle_usb_error(int status, const char *function, 328 struct hso_device *hso_dev); 329 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 330 int type, int dir); 331 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 332 static void hso_free_interface(struct usb_interface *intf); 333 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 334 static int hso_stop_serial_device(struct hso_device *hso_dev); 335 static int hso_start_net_device(struct hso_device *hso_dev); 336 static void hso_free_shared_int(struct hso_shared_int *shared_int); 337 static int hso_stop_net_device(struct hso_device *hso_dev); 338 static void hso_serial_ref_free(struct kref *ref); 339 static void hso_std_serial_read_bulk_callback(struct urb *urb); 340 static int hso_mux_serial_read(struct hso_serial *serial); 341 static void async_get_intf(struct work_struct *data); 342 static void async_put_intf(struct work_struct *data); 343 static int hso_put_activity(struct hso_device *hso_dev); 344 static int hso_get_activity(struct hso_device *hso_dev); 345 static void tiocmget_intr_callback(struct urb *urb); 346 static void reset_device(struct work_struct *data); 347 /*****************************************************************************/ 348 /* Helping functions */ 349 /*****************************************************************************/ 350 351 /* #define DEBUG */ 352 353 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 354 { 355 return hso_dev->port_data.dev_net; 356 } 357 358 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 359 { 360 return hso_dev->port_data.dev_serial; 361 } 362 363 /* Debugging functions */ 364 #ifdef DEBUG 365 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 366 unsigned int len) 367 { 368 static char name[255]; 369 370 sprintf(name, "hso[%d:%s]", line_count, func_name); 371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 372 } 373 374 #define DUMP(buf_, len_) \ 375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 376 377 #define DUMP1(buf_, len_) \ 378 do { \ 379 if (0x01 & debug) \ 380 DUMP(buf_, len_); \ 381 } while (0) 382 #else 383 #define DUMP(buf_, len_) 384 #define DUMP1(buf_, len_) 385 #endif 386 387 /* module parameters */ 388 static int debug; 389 static int tty_major; 390 static int disable_net; 391 392 /* driver info */ 393 static const char driver_name[] = "hso"; 394 static const char tty_filename[] = "ttyHS"; 395 static const char *version = __FILE__ ": " MOD_AUTHOR; 396 /* the usb driver itself (registered in hso_init) */ 397 static struct usb_driver hso_driver; 398 /* serial structures */ 399 static struct tty_driver *tty_drv; 400 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 401 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 402 static spinlock_t serial_table_lock; 403 404 static const s32 default_port_spec[] = { 405 HSO_INTF_MUX | HSO_PORT_NETWORK, 406 HSO_INTF_BULK | HSO_PORT_DIAG, 407 HSO_INTF_BULK | HSO_PORT_MODEM, 408 0 409 }; 410 411 static const s32 icon321_port_spec[] = { 412 HSO_INTF_MUX | HSO_PORT_NETWORK, 413 HSO_INTF_BULK | HSO_PORT_DIAG2, 414 HSO_INTF_BULK | HSO_PORT_MODEM, 415 HSO_INTF_BULK | HSO_PORT_DIAG, 416 0 417 }; 418 419 #define default_port_device(vendor, product) \ 420 USB_DEVICE(vendor, product), \ 421 .driver_info = (kernel_ulong_t)default_port_spec 422 423 #define icon321_port_device(vendor, product) \ 424 USB_DEVICE(vendor, product), \ 425 .driver_info = (kernel_ulong_t)icon321_port_spec 426 427 /* list of devices we support */ 428 static const struct usb_device_id hso_ids[] = { 429 {default_port_device(0x0af0, 0x6711)}, 430 {default_port_device(0x0af0, 0x6731)}, 431 {default_port_device(0x0af0, 0x6751)}, 432 {default_port_device(0x0af0, 0x6771)}, 433 {default_port_device(0x0af0, 0x6791)}, 434 {default_port_device(0x0af0, 0x6811)}, 435 {default_port_device(0x0af0, 0x6911)}, 436 {default_port_device(0x0af0, 0x6951)}, 437 {default_port_device(0x0af0, 0x6971)}, 438 {default_port_device(0x0af0, 0x7011)}, 439 {default_port_device(0x0af0, 0x7031)}, 440 {default_port_device(0x0af0, 0x7051)}, 441 {default_port_device(0x0af0, 0x7071)}, 442 {default_port_device(0x0af0, 0x7111)}, 443 {default_port_device(0x0af0, 0x7211)}, 444 {default_port_device(0x0af0, 0x7251)}, 445 {default_port_device(0x0af0, 0x7271)}, 446 {default_port_device(0x0af0, 0x7311)}, 447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 457 {USB_DEVICE(0x0af0, 0x7701)}, 458 {USB_DEVICE(0x0af0, 0x7706)}, 459 {USB_DEVICE(0x0af0, 0x7801)}, 460 {USB_DEVICE(0x0af0, 0x7901)}, 461 {USB_DEVICE(0x0af0, 0x7A01)}, 462 {USB_DEVICE(0x0af0, 0x7A05)}, 463 {USB_DEVICE(0x0af0, 0x8200)}, 464 {USB_DEVICE(0x0af0, 0x8201)}, 465 {USB_DEVICE(0x0af0, 0x8300)}, 466 {USB_DEVICE(0x0af0, 0x8302)}, 467 {USB_DEVICE(0x0af0, 0x8304)}, 468 {USB_DEVICE(0x0af0, 0x8400)}, 469 {USB_DEVICE(0x0af0, 0x8600)}, 470 {USB_DEVICE(0x0af0, 0x8800)}, 471 {USB_DEVICE(0x0af0, 0x8900)}, 472 {USB_DEVICE(0x0af0, 0x9000)}, 473 {USB_DEVICE(0x0af0, 0xd035)}, 474 {USB_DEVICE(0x0af0, 0xd055)}, 475 {USB_DEVICE(0x0af0, 0xd155)}, 476 {USB_DEVICE(0x0af0, 0xd255)}, 477 {USB_DEVICE(0x0af0, 0xd057)}, 478 {USB_DEVICE(0x0af0, 0xd157)}, 479 {USB_DEVICE(0x0af0, 0xd257)}, 480 {USB_DEVICE(0x0af0, 0xd357)}, 481 {USB_DEVICE(0x0af0, 0xd058)}, 482 {USB_DEVICE(0x0af0, 0xc100)}, 483 {} 484 }; 485 MODULE_DEVICE_TABLE(usb, hso_ids); 486 487 /* Sysfs attribute */ 488 static ssize_t hso_sysfs_show_porttype(struct device *dev, 489 struct device_attribute *attr, 490 char *buf) 491 { 492 struct hso_device *hso_dev = dev_get_drvdata(dev); 493 char *port_name; 494 495 if (!hso_dev) 496 return 0; 497 498 switch (hso_dev->port_spec & HSO_PORT_MASK) { 499 case HSO_PORT_CONTROL: 500 port_name = "Control"; 501 break; 502 case HSO_PORT_APP: 503 port_name = "Application"; 504 break; 505 case HSO_PORT_APP2: 506 port_name = "Application2"; 507 break; 508 case HSO_PORT_GPS: 509 port_name = "GPS"; 510 break; 511 case HSO_PORT_GPS_CONTROL: 512 port_name = "GPS Control"; 513 break; 514 case HSO_PORT_PCSC: 515 port_name = "PCSC"; 516 break; 517 case HSO_PORT_DIAG: 518 port_name = "Diagnostic"; 519 break; 520 case HSO_PORT_DIAG2: 521 port_name = "Diagnostic2"; 522 break; 523 case HSO_PORT_MODEM: 524 port_name = "Modem"; 525 break; 526 case HSO_PORT_NETWORK: 527 port_name = "Network"; 528 break; 529 default: 530 port_name = "Unknown"; 531 break; 532 } 533 534 return sprintf(buf, "%s\n", port_name); 535 } 536 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 537 538 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 539 { 540 int idx; 541 542 for (idx = 0; idx < serial->num_rx_urbs; idx++) 543 if (serial->rx_urb[idx] == urb) 544 return idx; 545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 546 return -1; 547 } 548 549 /* converts mux value to a port spec value */ 550 static u32 hso_mux_to_port(int mux) 551 { 552 u32 result; 553 554 switch (mux) { 555 case 0x1: 556 result = HSO_PORT_CONTROL; 557 break; 558 case 0x2: 559 result = HSO_PORT_APP; 560 break; 561 case 0x4: 562 result = HSO_PORT_PCSC; 563 break; 564 case 0x8: 565 result = HSO_PORT_GPS; 566 break; 567 case 0x10: 568 result = HSO_PORT_APP2; 569 break; 570 default: 571 result = HSO_PORT_NO_PORT; 572 } 573 return result; 574 } 575 576 /* converts port spec value to a mux value */ 577 static u32 hso_port_to_mux(int port) 578 { 579 u32 result; 580 581 switch (port & HSO_PORT_MASK) { 582 case HSO_PORT_CONTROL: 583 result = 0x0; 584 break; 585 case HSO_PORT_APP: 586 result = 0x1; 587 break; 588 case HSO_PORT_PCSC: 589 result = 0x2; 590 break; 591 case HSO_PORT_GPS: 592 result = 0x3; 593 break; 594 case HSO_PORT_APP2: 595 result = 0x4; 596 break; 597 default: 598 result = 0x0; 599 } 600 return result; 601 } 602 603 static struct hso_serial *get_serial_by_shared_int_and_type( 604 struct hso_shared_int *shared_int, 605 int mux) 606 { 607 int i, port; 608 609 port = hso_mux_to_port(mux); 610 611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 612 if (serial_table[i] && 613 (dev2ser(serial_table[i])->shared_int == shared_int) && 614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 615 return dev2ser(serial_table[i]); 616 } 617 } 618 619 return NULL; 620 } 621 622 static struct hso_serial *get_serial_by_index(unsigned index) 623 { 624 struct hso_serial *serial = NULL; 625 unsigned long flags; 626 627 spin_lock_irqsave(&serial_table_lock, flags); 628 if (serial_table[index]) 629 serial = dev2ser(serial_table[index]); 630 spin_unlock_irqrestore(&serial_table_lock, flags); 631 632 return serial; 633 } 634 635 static int get_free_serial_index(void) 636 { 637 int index; 638 unsigned long flags; 639 640 spin_lock_irqsave(&serial_table_lock, flags); 641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 642 if (serial_table[index] == NULL) { 643 spin_unlock_irqrestore(&serial_table_lock, flags); 644 return index; 645 } 646 } 647 spin_unlock_irqrestore(&serial_table_lock, flags); 648 649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 650 return -1; 651 } 652 653 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 654 { 655 unsigned long flags; 656 657 spin_lock_irqsave(&serial_table_lock, flags); 658 if (serial) 659 serial_table[index] = serial->parent; 660 else 661 serial_table[index] = NULL; 662 spin_unlock_irqrestore(&serial_table_lock, flags); 663 } 664 665 static void handle_usb_error(int status, const char *function, 666 struct hso_device *hso_dev) 667 { 668 char *explanation; 669 670 switch (status) { 671 case -ENODEV: 672 explanation = "no device"; 673 break; 674 case -ENOENT: 675 explanation = "endpoint not enabled"; 676 break; 677 case -EPIPE: 678 explanation = "endpoint stalled"; 679 break; 680 case -ENOSPC: 681 explanation = "not enough bandwidth"; 682 break; 683 case -ESHUTDOWN: 684 explanation = "device disabled"; 685 break; 686 case -EHOSTUNREACH: 687 explanation = "device suspended"; 688 break; 689 case -EINVAL: 690 case -EAGAIN: 691 case -EFBIG: 692 case -EMSGSIZE: 693 explanation = "internal error"; 694 break; 695 case -EILSEQ: 696 case -EPROTO: 697 case -ETIME: 698 case -ETIMEDOUT: 699 explanation = "protocol error"; 700 if (hso_dev) 701 schedule_work(&hso_dev->reset_device); 702 break; 703 default: 704 explanation = "unknown status"; 705 break; 706 } 707 708 /* log a meaningful explanation of an USB status */ 709 D1("%s: received USB status - %s (%d)", function, explanation, status); 710 } 711 712 /* Network interface functions */ 713 714 /* called when net interface is brought up by ifconfig */ 715 static int hso_net_open(struct net_device *net) 716 { 717 struct hso_net *odev = netdev_priv(net); 718 unsigned long flags = 0; 719 720 if (!odev) { 721 dev_err(&net->dev, "No net device !\n"); 722 return -ENODEV; 723 } 724 725 odev->skb_tx_buf = NULL; 726 727 /* setup environment */ 728 spin_lock_irqsave(&odev->net_lock, flags); 729 odev->rx_parse_state = WAIT_IP; 730 odev->rx_buf_size = 0; 731 odev->rx_buf_missing = sizeof(struct iphdr); 732 spin_unlock_irqrestore(&odev->net_lock, flags); 733 734 /* We are up and running. */ 735 set_bit(HSO_NET_RUNNING, &odev->flags); 736 hso_start_net_device(odev->parent); 737 738 /* Tell the kernel we are ready to start receiving from it */ 739 netif_start_queue(net); 740 741 return 0; 742 } 743 744 /* called when interface is brought down by ifconfig */ 745 static int hso_net_close(struct net_device *net) 746 { 747 struct hso_net *odev = netdev_priv(net); 748 749 /* we don't need the queue anymore */ 750 netif_stop_queue(net); 751 /* no longer running */ 752 clear_bit(HSO_NET_RUNNING, &odev->flags); 753 754 hso_stop_net_device(odev->parent); 755 756 /* done */ 757 return 0; 758 } 759 760 /* USB tells is xmit done, we should start the netqueue again */ 761 static void write_bulk_callback(struct urb *urb) 762 { 763 struct hso_net *odev = urb->context; 764 int status = urb->status; 765 766 /* Sanity check */ 767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 769 return; 770 } 771 772 /* Do we still have a valid kernel network device? */ 773 if (!netif_device_present(odev->net)) { 774 dev_err(&urb->dev->dev, "%s: net device not present\n", 775 __func__); 776 return; 777 } 778 779 /* log status, but don't act on it, we don't need to resubmit anything 780 * anyhow */ 781 if (status) 782 handle_usb_error(status, __func__, odev->parent); 783 784 hso_put_activity(odev->parent); 785 786 /* Tell the network interface we are ready for another frame */ 787 netif_wake_queue(odev->net); 788 } 789 790 /* called by kernel when we need to transmit a packet */ 791 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 792 struct net_device *net) 793 { 794 struct hso_net *odev = netdev_priv(net); 795 int result; 796 797 /* Tell the kernel, "No more frames 'til we are done with this one." */ 798 netif_stop_queue(net); 799 if (hso_get_activity(odev->parent) == -EAGAIN) { 800 odev->skb_tx_buf = skb; 801 return NETDEV_TX_OK; 802 } 803 804 /* log if asked */ 805 DUMP1(skb->data, skb->len); 806 /* Copy it from kernel memory to OUR memory */ 807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 809 810 /* Fill in the URB for shipping it out. */ 811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 812 odev->parent->usb, 813 usb_sndbulkpipe(odev->parent->usb, 814 odev->out_endp-> 815 bEndpointAddress & 0x7F), 816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 817 odev); 818 819 /* Deal with the Zero Length packet problem, I hope */ 820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 821 822 /* Send the URB on its merry way. */ 823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 824 if (result) { 825 dev_warn(&odev->parent->interface->dev, 826 "failed mux_bulk_tx_urb %d\n", result); 827 net->stats.tx_errors++; 828 netif_start_queue(net); 829 } else { 830 net->stats.tx_packets++; 831 net->stats.tx_bytes += skb->len; 832 } 833 dev_kfree_skb(skb); 834 /* we're done */ 835 return NETDEV_TX_OK; 836 } 837 838 static const struct ethtool_ops ops = { 839 .get_link = ethtool_op_get_link 840 }; 841 842 /* called when a packet did not ack after watchdogtimeout */ 843 static void hso_net_tx_timeout(struct net_device *net) 844 { 845 struct hso_net *odev = netdev_priv(net); 846 847 if (!odev) 848 return; 849 850 /* Tell syslog we are hosed. */ 851 dev_warn(&net->dev, "Tx timed out.\n"); 852 853 /* Tear the waiting frame off the list */ 854 if (odev->mux_bulk_tx_urb && 855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 856 usb_unlink_urb(odev->mux_bulk_tx_urb); 857 858 /* Update statistics */ 859 net->stats.tx_errors++; 860 } 861 862 /* make a real packet from the received USB buffer */ 863 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 864 unsigned int count, unsigned char is_eop) 865 { 866 unsigned short temp_bytes; 867 unsigned short buffer_offset = 0; 868 unsigned short frame_len; 869 unsigned char *tmp_rx_buf; 870 871 /* log if needed */ 872 D1("Rx %d bytes", count); 873 DUMP(ip_pkt, min(128, (int)count)); 874 875 while (count) { 876 switch (odev->rx_parse_state) { 877 case WAIT_IP: 878 /* waiting for IP header. */ 879 /* wanted bytes - size of ip header */ 880 temp_bytes = 881 (count < 882 odev->rx_buf_missing) ? count : odev-> 883 rx_buf_missing; 884 885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 886 odev->rx_buf_size, ip_pkt + buffer_offset, 887 temp_bytes); 888 889 odev->rx_buf_size += temp_bytes; 890 buffer_offset += temp_bytes; 891 odev->rx_buf_missing -= temp_bytes; 892 count -= temp_bytes; 893 894 if (!odev->rx_buf_missing) { 895 /* header is complete allocate an sk_buffer and 896 * continue to WAIT_DATA */ 897 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 898 899 if ((frame_len > DEFAULT_MRU) || 900 (frame_len < sizeof(struct iphdr))) { 901 dev_err(&odev->net->dev, 902 "Invalid frame (%d) length\n", 903 frame_len); 904 odev->rx_parse_state = WAIT_SYNC; 905 continue; 906 } 907 /* Allocate an sk_buff */ 908 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 909 frame_len); 910 if (!odev->skb_rx_buf) { 911 /* We got no receive buffer. */ 912 D1("could not allocate memory"); 913 odev->rx_parse_state = WAIT_SYNC; 914 return; 915 } 916 917 /* Copy what we got so far. make room for iphdr 918 * after tail. */ 919 tmp_rx_buf = 920 skb_put(odev->skb_rx_buf, 921 sizeof(struct iphdr)); 922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 923 sizeof(struct iphdr)); 924 925 /* ETH_HLEN */ 926 odev->rx_buf_size = sizeof(struct iphdr); 927 928 /* Filip actually use .tot_len */ 929 odev->rx_buf_missing = 930 frame_len - sizeof(struct iphdr); 931 odev->rx_parse_state = WAIT_DATA; 932 } 933 break; 934 935 case WAIT_DATA: 936 temp_bytes = (count < odev->rx_buf_missing) 937 ? count : odev->rx_buf_missing; 938 939 /* Copy the rest of the bytes that are left in the 940 * buffer into the waiting sk_buf. */ 941 /* Make room for temp_bytes after tail. */ 942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 944 945 odev->rx_buf_missing -= temp_bytes; 946 count -= temp_bytes; 947 buffer_offset += temp_bytes; 948 odev->rx_buf_size += temp_bytes; 949 if (!odev->rx_buf_missing) { 950 /* Packet is complete. Inject into stack. */ 951 /* We have IP packet here */ 952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 953 skb_reset_mac_header(odev->skb_rx_buf); 954 955 /* Ship it off to the kernel */ 956 netif_rx(odev->skb_rx_buf); 957 /* No longer our buffer. */ 958 odev->skb_rx_buf = NULL; 959 960 /* update out statistics */ 961 odev->net->stats.rx_packets++; 962 963 odev->net->stats.rx_bytes += odev->rx_buf_size; 964 965 odev->rx_buf_size = 0; 966 odev->rx_buf_missing = sizeof(struct iphdr); 967 odev->rx_parse_state = WAIT_IP; 968 } 969 break; 970 971 case WAIT_SYNC: 972 D1(" W_S"); 973 count = 0; 974 break; 975 default: 976 D1(" "); 977 count--; 978 break; 979 } 980 } 981 982 /* Recovery mechanism for WAIT_SYNC state. */ 983 if (is_eop) { 984 if (odev->rx_parse_state == WAIT_SYNC) { 985 odev->rx_parse_state = WAIT_IP; 986 odev->rx_buf_size = 0; 987 odev->rx_buf_missing = sizeof(struct iphdr); 988 } 989 } 990 } 991 992 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 993 { 994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 996 997 if (((rest == 5) || (rest == 6)) && 998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 999 crc_check, 4)) { 1000 urb->actual_length -= 4; 1001 } 1002 } 1003 1004 /* Moving data from usb to kernel (in interrupt state) */ 1005 static void read_bulk_callback(struct urb *urb) 1006 { 1007 struct hso_net *odev = urb->context; 1008 struct net_device *net; 1009 int result; 1010 int status = urb->status; 1011 1012 /* is al ok? (Filip: Who's Al ?) */ 1013 if (status) { 1014 handle_usb_error(status, __func__, odev->parent); 1015 return; 1016 } 1017 1018 /* Sanity check */ 1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1020 D1("BULK IN callback but driver is not active!"); 1021 return; 1022 } 1023 usb_mark_last_busy(urb->dev); 1024 1025 net = odev->net; 1026 1027 if (!netif_device_present(net)) { 1028 /* Somebody killed our network interface... */ 1029 return; 1030 } 1031 1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1034 1035 /* do we even have a packet? */ 1036 if (urb->actual_length) { 1037 /* Handle the IP stream, add header and push it onto network 1038 * stack if the packet is complete. */ 1039 spin_lock(&odev->net_lock); 1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1041 (urb->transfer_buffer_length > 1042 urb->actual_length) ? 1 : 0); 1043 spin_unlock(&odev->net_lock); 1044 } 1045 1046 /* We are done with this URB, resubmit it. Prep the USB to wait for 1047 * another frame. Reuse same as received. */ 1048 usb_fill_bulk_urb(urb, 1049 odev->parent->usb, 1050 usb_rcvbulkpipe(odev->parent->usb, 1051 odev->in_endp-> 1052 bEndpointAddress & 0x7F), 1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1054 read_bulk_callback, odev); 1055 1056 /* Give this to the USB subsystem so it can tell us when more data 1057 * arrives. */ 1058 result = usb_submit_urb(urb, GFP_ATOMIC); 1059 if (result) 1060 dev_warn(&odev->parent->interface->dev, 1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1062 result); 1063 } 1064 1065 /* Serial driver functions */ 1066 1067 static void hso_init_termios(struct ktermios *termios) 1068 { 1069 /* 1070 * The default requirements for this device are: 1071 */ 1072 termios->c_iflag &= 1073 ~(IGNBRK /* disable ignore break */ 1074 | BRKINT /* disable break causes interrupt */ 1075 | PARMRK /* disable mark parity errors */ 1076 | ISTRIP /* disable clear high bit of input characters */ 1077 | INLCR /* disable translate NL to CR */ 1078 | IGNCR /* disable ignore CR */ 1079 | ICRNL /* disable translate CR to NL */ 1080 | IXON); /* disable enable XON/XOFF flow control */ 1081 1082 /* disable postprocess output characters */ 1083 termios->c_oflag &= ~OPOST; 1084 1085 termios->c_lflag &= 1086 ~(ECHO /* disable echo input characters */ 1087 | ECHONL /* disable echo new line */ 1088 | ICANON /* disable erase, kill, werase, and rprnt 1089 special characters */ 1090 | ISIG /* disable interrupt, quit, and suspend special 1091 characters */ 1092 | IEXTEN); /* disable non-POSIX special characters */ 1093 1094 termios->c_cflag &= 1095 ~(CSIZE /* no size */ 1096 | PARENB /* disable parity bit */ 1097 | CBAUD /* clear current baud rate */ 1098 | CBAUDEX); /* clear current buad rate */ 1099 1100 termios->c_cflag |= CS8; /* character size 8 bits */ 1101 1102 /* baud rate 115200 */ 1103 tty_termios_encode_baud_rate(termios, 115200, 115200); 1104 } 1105 1106 static void _hso_serial_set_termios(struct tty_struct *tty, 1107 struct ktermios *old) 1108 { 1109 struct hso_serial *serial = tty->driver_data; 1110 1111 if (!serial) { 1112 printk(KERN_ERR "%s: no tty structures", __func__); 1113 return; 1114 } 1115 1116 D4("port %d", serial->minor); 1117 1118 /* 1119 * Fix up unsupported bits 1120 */ 1121 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1122 1123 tty->termios.c_cflag &= 1124 ~(CSIZE /* no size */ 1125 | PARENB /* disable parity bit */ 1126 | CBAUD /* clear current baud rate */ 1127 | CBAUDEX); /* clear current buad rate */ 1128 1129 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1130 1131 /* baud rate 115200 */ 1132 tty_encode_baud_rate(tty, 115200, 115200); 1133 } 1134 1135 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1136 { 1137 int result; 1138 /* We are done with this URB, resubmit it. Prep the USB to wait for 1139 * another frame */ 1140 usb_fill_bulk_urb(urb, serial->parent->usb, 1141 usb_rcvbulkpipe(serial->parent->usb, 1142 serial->in_endp-> 1143 bEndpointAddress & 0x7F), 1144 urb->transfer_buffer, serial->rx_data_length, 1145 hso_std_serial_read_bulk_callback, serial); 1146 /* Give this to the USB subsystem so it can tell us when more data 1147 * arrives. */ 1148 result = usb_submit_urb(urb, GFP_ATOMIC); 1149 if (result) { 1150 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1151 __func__, result); 1152 } 1153 } 1154 1155 1156 1157 1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1159 { 1160 int count; 1161 struct urb *curr_urb; 1162 1163 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1164 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1165 count = put_rxbuf_data(curr_urb, serial); 1166 if (count == -1) 1167 return; 1168 if (count == 0) { 1169 serial->curr_rx_urb_idx++; 1170 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1171 serial->curr_rx_urb_idx = 0; 1172 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1173 } 1174 } 1175 } 1176 1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1178 { 1179 int count = 0; 1180 struct urb *urb; 1181 1182 urb = serial->rx_urb[0]; 1183 if (serial->port.count > 0) { 1184 count = put_rxbuf_data(urb, serial); 1185 if (count == -1) 1186 return; 1187 } 1188 /* Re issue a read as long as we receive data. */ 1189 1190 if (count == 0 && ((urb->actual_length != 0) || 1191 (serial->rx_state == RX_PENDING))) { 1192 serial->rx_state = RX_SENT; 1193 hso_mux_serial_read(serial); 1194 } else 1195 serial->rx_state = RX_IDLE; 1196 } 1197 1198 1199 /* read callback for Diag and CS port */ 1200 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1201 { 1202 struct hso_serial *serial = urb->context; 1203 int status = urb->status; 1204 1205 /* sanity check */ 1206 if (!serial) { 1207 D1("serial == NULL"); 1208 return; 1209 } else if (status) { 1210 handle_usb_error(status, __func__, serial->parent); 1211 return; 1212 } 1213 1214 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1215 D1("Actual length = %d\n", urb->actual_length); 1216 DUMP1(urb->transfer_buffer, urb->actual_length); 1217 1218 /* Anyone listening? */ 1219 if (serial->port.count == 0) 1220 return; 1221 1222 if (status == 0) { 1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1224 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1225 /* Valid data, handle RX data */ 1226 spin_lock(&serial->serial_lock); 1227 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1228 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1229 spin_unlock(&serial->serial_lock); 1230 } else if (status == -ENOENT || status == -ECONNRESET) { 1231 /* Unlinked - check for throttled port. */ 1232 D2("Port %d, successfully unlinked urb", serial->minor); 1233 spin_lock(&serial->serial_lock); 1234 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1235 hso_resubmit_rx_bulk_urb(serial, urb); 1236 spin_unlock(&serial->serial_lock); 1237 } else { 1238 D2("Port %d, status = %d for read urb", serial->minor, status); 1239 return; 1240 } 1241 } 1242 1243 /* 1244 * This needs to be a tasklet otherwise we will 1245 * end up recursively calling this function. 1246 */ 1247 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1248 { 1249 unsigned long flags; 1250 1251 spin_lock_irqsave(&serial->serial_lock, flags); 1252 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1253 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1254 else 1255 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1256 spin_unlock_irqrestore(&serial->serial_lock, flags); 1257 } 1258 1259 static void hso_unthrottle(struct tty_struct *tty) 1260 { 1261 struct hso_serial *serial = tty->driver_data; 1262 1263 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1264 } 1265 1266 static void hso_unthrottle_workfunc(struct work_struct *work) 1267 { 1268 struct hso_serial *serial = 1269 container_of(work, struct hso_serial, 1270 retry_unthrottle_workqueue); 1271 hso_unthrottle_tasklet(serial); 1272 } 1273 1274 /* open the requested serial port */ 1275 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1276 { 1277 struct hso_serial *serial = get_serial_by_index(tty->index); 1278 int result; 1279 1280 /* sanity check */ 1281 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1282 WARN_ON(1); 1283 tty->driver_data = NULL; 1284 D1("Failed to open port"); 1285 return -ENODEV; 1286 } 1287 1288 mutex_lock(&serial->parent->mutex); 1289 result = usb_autopm_get_interface(serial->parent->interface); 1290 if (result < 0) 1291 goto err_out; 1292 1293 D1("Opening %d", serial->minor); 1294 kref_get(&serial->parent->ref); 1295 1296 /* setup */ 1297 tty->driver_data = serial; 1298 tty_port_tty_set(&serial->port, tty); 1299 1300 /* check for port already opened, if not set the termios */ 1301 serial->port.count++; 1302 if (serial->port.count == 1) { 1303 serial->rx_state = RX_IDLE; 1304 /* Force default termio settings */ 1305 _hso_serial_set_termios(tty, NULL); 1306 tasklet_init(&serial->unthrottle_tasklet, 1307 (void (*)(unsigned long))hso_unthrottle_tasklet, 1308 (unsigned long)serial); 1309 INIT_WORK(&serial->retry_unthrottle_workqueue, 1310 hso_unthrottle_workfunc); 1311 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1312 if (result) { 1313 hso_stop_serial_device(serial->parent); 1314 serial->port.count--; 1315 kref_put(&serial->parent->ref, hso_serial_ref_free); 1316 } 1317 } else { 1318 D1("Port was already open"); 1319 } 1320 1321 usb_autopm_put_interface(serial->parent->interface); 1322 1323 /* done */ 1324 if (result) 1325 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1326 err_out: 1327 mutex_unlock(&serial->parent->mutex); 1328 return result; 1329 } 1330 1331 /* close the requested serial port */ 1332 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1333 { 1334 struct hso_serial *serial = tty->driver_data; 1335 u8 usb_gone; 1336 1337 D1("Closing serial port"); 1338 1339 /* Open failed, no close cleanup required */ 1340 if (serial == NULL) 1341 return; 1342 1343 mutex_lock(&serial->parent->mutex); 1344 usb_gone = serial->parent->usb_gone; 1345 1346 if (!usb_gone) 1347 usb_autopm_get_interface(serial->parent->interface); 1348 1349 /* reset the rts and dtr */ 1350 /* do the actual close */ 1351 serial->port.count--; 1352 1353 if (serial->port.count <= 0) { 1354 serial->port.count = 0; 1355 tty_port_tty_set(&serial->port, NULL); 1356 if (!usb_gone) 1357 hso_stop_serial_device(serial->parent); 1358 tasklet_kill(&serial->unthrottle_tasklet); 1359 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1360 } 1361 1362 if (!usb_gone) 1363 usb_autopm_put_interface(serial->parent->interface); 1364 1365 mutex_unlock(&serial->parent->mutex); 1366 1367 kref_put(&serial->parent->ref, hso_serial_ref_free); 1368 } 1369 1370 /* close the requested serial port */ 1371 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1372 int count) 1373 { 1374 struct hso_serial *serial = tty->driver_data; 1375 int space, tx_bytes; 1376 unsigned long flags; 1377 1378 /* sanity check */ 1379 if (serial == NULL) { 1380 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1381 return -ENODEV; 1382 } 1383 1384 spin_lock_irqsave(&serial->serial_lock, flags); 1385 1386 space = serial->tx_data_length - serial->tx_buffer_count; 1387 tx_bytes = (count < space) ? count : space; 1388 1389 if (!tx_bytes) 1390 goto out; 1391 1392 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1393 serial->tx_buffer_count += tx_bytes; 1394 1395 out: 1396 spin_unlock_irqrestore(&serial->serial_lock, flags); 1397 1398 hso_kick_transmit(serial); 1399 /* done */ 1400 return tx_bytes; 1401 } 1402 1403 /* how much room is there for writing */ 1404 static int hso_serial_write_room(struct tty_struct *tty) 1405 { 1406 struct hso_serial *serial = tty->driver_data; 1407 int room; 1408 unsigned long flags; 1409 1410 spin_lock_irqsave(&serial->serial_lock, flags); 1411 room = serial->tx_data_length - serial->tx_buffer_count; 1412 spin_unlock_irqrestore(&serial->serial_lock, flags); 1413 1414 /* return free room */ 1415 return room; 1416 } 1417 1418 /* setup the term */ 1419 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1420 { 1421 struct hso_serial *serial = tty->driver_data; 1422 unsigned long flags; 1423 1424 if (old) 1425 D5("Termios called with: cflags new[%d] - old[%d]", 1426 tty->termios.c_cflag, old->c_cflag); 1427 1428 /* the actual setup */ 1429 spin_lock_irqsave(&serial->serial_lock, flags); 1430 if (serial->port.count) 1431 _hso_serial_set_termios(tty, old); 1432 else 1433 tty->termios = *old; 1434 spin_unlock_irqrestore(&serial->serial_lock, flags); 1435 1436 /* done */ 1437 } 1438 1439 /* how many characters in the buffer */ 1440 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1441 { 1442 struct hso_serial *serial = tty->driver_data; 1443 int chars; 1444 unsigned long flags; 1445 1446 /* sanity check */ 1447 if (serial == NULL) 1448 return 0; 1449 1450 spin_lock_irqsave(&serial->serial_lock, flags); 1451 chars = serial->tx_buffer_count; 1452 spin_unlock_irqrestore(&serial->serial_lock, flags); 1453 1454 return chars; 1455 } 1456 static int tiocmget_submit_urb(struct hso_serial *serial, 1457 struct hso_tiocmget *tiocmget, 1458 struct usb_device *usb) 1459 { 1460 int result; 1461 1462 if (serial->parent->usb_gone) 1463 return -ENODEV; 1464 usb_fill_int_urb(tiocmget->urb, usb, 1465 usb_rcvintpipe(usb, 1466 tiocmget->endp-> 1467 bEndpointAddress & 0x7F), 1468 &tiocmget->serial_state_notification, 1469 sizeof(struct hso_serial_state_notification), 1470 tiocmget_intr_callback, serial, 1471 tiocmget->endp->bInterval); 1472 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1473 if (result) { 1474 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1475 result); 1476 } 1477 return result; 1478 1479 } 1480 1481 static void tiocmget_intr_callback(struct urb *urb) 1482 { 1483 struct hso_serial *serial = urb->context; 1484 struct hso_tiocmget *tiocmget; 1485 int status = urb->status; 1486 u16 UART_state_bitmap, prev_UART_state_bitmap; 1487 struct uart_icount *icount; 1488 struct hso_serial_state_notification *serial_state_notification; 1489 struct usb_device *usb; 1490 1491 /* Sanity checks */ 1492 if (!serial) 1493 return; 1494 if (status) { 1495 handle_usb_error(status, __func__, serial->parent); 1496 return; 1497 } 1498 tiocmget = serial->tiocmget; 1499 if (!tiocmget) 1500 return; 1501 usb = serial->parent->usb; 1502 serial_state_notification = &tiocmget->serial_state_notification; 1503 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1504 serial_state_notification->bNotification != B_NOTIFICATION || 1505 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1506 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1507 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1508 dev_warn(&usb->dev, 1509 "hso received invalid serial state notification\n"); 1510 DUMP(serial_state_notification, 1511 sizeof(struct hso_serial_state_notification)); 1512 } else { 1513 1514 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1515 UART_state_bitmap); 1516 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1517 icount = &tiocmget->icount; 1518 spin_lock(&serial->serial_lock); 1519 if ((UART_state_bitmap & B_OVERRUN) != 1520 (prev_UART_state_bitmap & B_OVERRUN)) 1521 icount->parity++; 1522 if ((UART_state_bitmap & B_PARITY) != 1523 (prev_UART_state_bitmap & B_PARITY)) 1524 icount->parity++; 1525 if ((UART_state_bitmap & B_FRAMING) != 1526 (prev_UART_state_bitmap & B_FRAMING)) 1527 icount->frame++; 1528 if ((UART_state_bitmap & B_RING_SIGNAL) && 1529 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1530 icount->rng++; 1531 if ((UART_state_bitmap & B_BREAK) != 1532 (prev_UART_state_bitmap & B_BREAK)) 1533 icount->brk++; 1534 if ((UART_state_bitmap & B_TX_CARRIER) != 1535 (prev_UART_state_bitmap & B_TX_CARRIER)) 1536 icount->dsr++; 1537 if ((UART_state_bitmap & B_RX_CARRIER) != 1538 (prev_UART_state_bitmap & B_RX_CARRIER)) 1539 icount->dcd++; 1540 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1541 spin_unlock(&serial->serial_lock); 1542 tiocmget->intr_completed = 1; 1543 wake_up_interruptible(&tiocmget->waitq); 1544 } 1545 memset(serial_state_notification, 0, 1546 sizeof(struct hso_serial_state_notification)); 1547 tiocmget_submit_urb(serial, 1548 tiocmget, 1549 serial->parent->usb); 1550 } 1551 1552 /* 1553 * next few functions largely stolen from drivers/serial/serial_core.c 1554 */ 1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1556 * - mask passed in arg for lines of interest 1557 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1558 * Caller should use TIOCGICOUNT to see which one it was 1559 */ 1560 static int 1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1562 { 1563 DECLARE_WAITQUEUE(wait, current); 1564 struct uart_icount cprev, cnow; 1565 struct hso_tiocmget *tiocmget; 1566 int ret; 1567 1568 tiocmget = serial->tiocmget; 1569 if (!tiocmget) 1570 return -ENOENT; 1571 /* 1572 * note the counters on entry 1573 */ 1574 spin_lock_irq(&serial->serial_lock); 1575 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1576 spin_unlock_irq(&serial->serial_lock); 1577 add_wait_queue(&tiocmget->waitq, &wait); 1578 for (;;) { 1579 spin_lock_irq(&serial->serial_lock); 1580 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1581 spin_unlock_irq(&serial->serial_lock); 1582 set_current_state(TASK_INTERRUPTIBLE); 1583 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1584 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1585 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1586 ret = 0; 1587 break; 1588 } 1589 schedule(); 1590 /* see if a signal did it */ 1591 if (signal_pending(current)) { 1592 ret = -ERESTARTSYS; 1593 break; 1594 } 1595 cprev = cnow; 1596 } 1597 current->state = TASK_RUNNING; 1598 remove_wait_queue(&tiocmget->waitq, &wait); 1599 1600 return ret; 1601 } 1602 1603 /* 1604 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1605 * Return: write counters to the user passed counter struct 1606 * NB: both 1->0 and 0->1 transitions are counted except for 1607 * RI where only 0->1 is counted. 1608 */ 1609 static int hso_get_count(struct tty_struct *tty, 1610 struct serial_icounter_struct *icount) 1611 { 1612 struct uart_icount cnow; 1613 struct hso_serial *serial = tty->driver_data; 1614 struct hso_tiocmget *tiocmget = serial->tiocmget; 1615 1616 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1617 1618 if (!tiocmget) 1619 return -ENOENT; 1620 spin_lock_irq(&serial->serial_lock); 1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1622 spin_unlock_irq(&serial->serial_lock); 1623 1624 icount->cts = cnow.cts; 1625 icount->dsr = cnow.dsr; 1626 icount->rng = cnow.rng; 1627 icount->dcd = cnow.dcd; 1628 icount->rx = cnow.rx; 1629 icount->tx = cnow.tx; 1630 icount->frame = cnow.frame; 1631 icount->overrun = cnow.overrun; 1632 icount->parity = cnow.parity; 1633 icount->brk = cnow.brk; 1634 icount->buf_overrun = cnow.buf_overrun; 1635 1636 return 0; 1637 } 1638 1639 1640 static int hso_serial_tiocmget(struct tty_struct *tty) 1641 { 1642 int retval; 1643 struct hso_serial *serial = tty->driver_data; 1644 struct hso_tiocmget *tiocmget; 1645 u16 UART_state_bitmap; 1646 1647 /* sanity check */ 1648 if (!serial) { 1649 D1("no tty structures"); 1650 return -EINVAL; 1651 } 1652 spin_lock_irq(&serial->serial_lock); 1653 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1654 ((serial->dtr_state) ? TIOCM_DTR : 0); 1655 tiocmget = serial->tiocmget; 1656 if (tiocmget) { 1657 1658 UART_state_bitmap = le16_to_cpu( 1659 tiocmget->prev_UART_state_bitmap); 1660 if (UART_state_bitmap & B_RING_SIGNAL) 1661 retval |= TIOCM_RNG; 1662 if (UART_state_bitmap & B_RX_CARRIER) 1663 retval |= TIOCM_CD; 1664 if (UART_state_bitmap & B_TX_CARRIER) 1665 retval |= TIOCM_DSR; 1666 } 1667 spin_unlock_irq(&serial->serial_lock); 1668 return retval; 1669 } 1670 1671 static int hso_serial_tiocmset(struct tty_struct *tty, 1672 unsigned int set, unsigned int clear) 1673 { 1674 int val = 0; 1675 unsigned long flags; 1676 int if_num; 1677 struct hso_serial *serial = tty->driver_data; 1678 1679 /* sanity check */ 1680 if (!serial) { 1681 D1("no tty structures"); 1682 return -EINVAL; 1683 } 1684 1685 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1686 return -EINVAL; 1687 1688 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1689 1690 spin_lock_irqsave(&serial->serial_lock, flags); 1691 if (set & TIOCM_RTS) 1692 serial->rts_state = 1; 1693 if (set & TIOCM_DTR) 1694 serial->dtr_state = 1; 1695 1696 if (clear & TIOCM_RTS) 1697 serial->rts_state = 0; 1698 if (clear & TIOCM_DTR) 1699 serial->dtr_state = 0; 1700 1701 if (serial->dtr_state) 1702 val |= 0x01; 1703 if (serial->rts_state) 1704 val |= 0x02; 1705 1706 spin_unlock_irqrestore(&serial->serial_lock, flags); 1707 1708 return usb_control_msg(serial->parent->usb, 1709 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1710 0x21, val, if_num, NULL, 0, 1711 USB_CTRL_SET_TIMEOUT); 1712 } 1713 1714 static int hso_serial_ioctl(struct tty_struct *tty, 1715 unsigned int cmd, unsigned long arg) 1716 { 1717 struct hso_serial *serial = tty->driver_data; 1718 int ret = 0; 1719 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1720 1721 if (!serial) 1722 return -ENODEV; 1723 switch (cmd) { 1724 case TIOCMIWAIT: 1725 ret = hso_wait_modem_status(serial, arg); 1726 break; 1727 default: 1728 ret = -ENOIOCTLCMD; 1729 break; 1730 } 1731 return ret; 1732 } 1733 1734 1735 /* starts a transmit */ 1736 static void hso_kick_transmit(struct hso_serial *serial) 1737 { 1738 u8 *temp; 1739 unsigned long flags; 1740 int res; 1741 1742 spin_lock_irqsave(&serial->serial_lock, flags); 1743 if (!serial->tx_buffer_count) 1744 goto out; 1745 1746 if (serial->tx_urb_used) 1747 goto out; 1748 1749 /* Wakeup USB interface if necessary */ 1750 if (hso_get_activity(serial->parent) == -EAGAIN) 1751 goto out; 1752 1753 /* Switch pointers around to avoid memcpy */ 1754 temp = serial->tx_buffer; 1755 serial->tx_buffer = serial->tx_data; 1756 serial->tx_data = temp; 1757 serial->tx_data_count = serial->tx_buffer_count; 1758 serial->tx_buffer_count = 0; 1759 1760 /* If temp is set, it means we switched buffers */ 1761 if (temp && serial->write_data) { 1762 res = serial->write_data(serial); 1763 if (res >= 0) 1764 serial->tx_urb_used = 1; 1765 } 1766 out: 1767 spin_unlock_irqrestore(&serial->serial_lock, flags); 1768 } 1769 1770 /* make a request (for reading and writing data to muxed serial port) */ 1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1772 struct urb *ctrl_urb, 1773 struct usb_ctrlrequest *ctrl_req, 1774 u8 *ctrl_urb_data, u32 size) 1775 { 1776 int result; 1777 int pipe; 1778 1779 /* Sanity check */ 1780 if (!serial || !ctrl_urb || !ctrl_req) { 1781 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1782 return -EINVAL; 1783 } 1784 1785 /* initialize */ 1786 ctrl_req->wValue = 0; 1787 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1788 ctrl_req->wLength = cpu_to_le16(size); 1789 1790 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1791 /* Reading command */ 1792 ctrl_req->bRequestType = USB_DIR_IN | 1793 USB_TYPE_OPTION_VENDOR | 1794 USB_RECIP_INTERFACE; 1795 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1796 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1797 } else { 1798 /* Writing command */ 1799 ctrl_req->bRequestType = USB_DIR_OUT | 1800 USB_TYPE_OPTION_VENDOR | 1801 USB_RECIP_INTERFACE; 1802 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1803 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1804 } 1805 /* syslog */ 1806 D2("%s command (%02x) len: %d, port: %d", 1807 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1808 ctrl_req->bRequestType, ctrl_req->wLength, port); 1809 1810 /* Load ctrl urb */ 1811 ctrl_urb->transfer_flags = 0; 1812 usb_fill_control_urb(ctrl_urb, 1813 serial->parent->usb, 1814 pipe, 1815 (u8 *) ctrl_req, 1816 ctrl_urb_data, size, ctrl_callback, serial); 1817 /* Send it on merry way */ 1818 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1819 if (result) { 1820 dev_err(&ctrl_urb->dev->dev, 1821 "%s failed submit ctrl_urb %d type %d\n", __func__, 1822 result, type); 1823 return result; 1824 } 1825 1826 /* done */ 1827 return size; 1828 } 1829 1830 /* called by intr_callback when read occurs */ 1831 static int hso_mux_serial_read(struct hso_serial *serial) 1832 { 1833 if (!serial) 1834 return -EINVAL; 1835 1836 /* clean data */ 1837 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1838 /* make the request */ 1839 1840 if (serial->num_rx_urbs != 1) { 1841 dev_err(&serial->parent->interface->dev, 1842 "ERROR: mux'd reads with multiple buffers " 1843 "not possible\n"); 1844 return 0; 1845 } 1846 return mux_device_request(serial, 1847 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1848 serial->parent->port_spec & HSO_PORT_MASK, 1849 serial->rx_urb[0], 1850 &serial->ctrl_req_rx, 1851 serial->rx_data[0], serial->rx_data_length); 1852 } 1853 1854 /* used for muxed serial port callback (muxed serial read) */ 1855 static void intr_callback(struct urb *urb) 1856 { 1857 struct hso_shared_int *shared_int = urb->context; 1858 struct hso_serial *serial; 1859 unsigned char *port_req; 1860 int status = urb->status; 1861 int i; 1862 1863 usb_mark_last_busy(urb->dev); 1864 1865 /* sanity check */ 1866 if (!shared_int) 1867 return; 1868 1869 /* status check */ 1870 if (status) { 1871 handle_usb_error(status, __func__, NULL); 1872 return; 1873 } 1874 D4("\n--- Got intr callback 0x%02X ---", status); 1875 1876 /* what request? */ 1877 port_req = urb->transfer_buffer; 1878 D4(" port_req = 0x%.2X\n", *port_req); 1879 /* loop over all muxed ports to find the one sending this */ 1880 for (i = 0; i < 8; i++) { 1881 /* max 8 channels on MUX */ 1882 if (*port_req & (1 << i)) { 1883 serial = get_serial_by_shared_int_and_type(shared_int, 1884 (1 << i)); 1885 if (serial != NULL) { 1886 D1("Pending read interrupt on port %d\n", i); 1887 spin_lock(&serial->serial_lock); 1888 if (serial->rx_state == RX_IDLE && 1889 serial->port.count > 0) { 1890 /* Setup and send a ctrl req read on 1891 * port i */ 1892 if (!serial->rx_urb_filled[0]) { 1893 serial->rx_state = RX_SENT; 1894 hso_mux_serial_read(serial); 1895 } else 1896 serial->rx_state = RX_PENDING; 1897 } else { 1898 D1("Already a read pending on " 1899 "port %d or port not open\n", i); 1900 } 1901 spin_unlock(&serial->serial_lock); 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 1929 /* sanity check */ 1930 if (!serial) { 1931 D1("serial == NULL"); 1932 return; 1933 } 1934 1935 spin_lock(&serial->serial_lock); 1936 serial->tx_urb_used = 0; 1937 spin_unlock(&serial->serial_lock); 1938 if (status) { 1939 handle_usb_error(status, __func__, serial->parent); 1940 return; 1941 } 1942 hso_put_activity(serial->parent); 1943 tty_port_tty_wakeup(&serial->port); 1944 hso_kick_transmit(serial); 1945 1946 D1(" "); 1947 } 1948 1949 /* called for writing diag or CS serial port */ 1950 static int hso_std_serial_write_data(struct hso_serial *serial) 1951 { 1952 int count = serial->tx_data_count; 1953 int result; 1954 1955 usb_fill_bulk_urb(serial->tx_urb, 1956 serial->parent->usb, 1957 usb_sndbulkpipe(serial->parent->usb, 1958 serial->out_endp-> 1959 bEndpointAddress & 0x7F), 1960 serial->tx_data, serial->tx_data_count, 1961 hso_std_serial_write_bulk_callback, serial); 1962 1963 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1964 if (result) { 1965 dev_warn(&serial->parent->usb->dev, 1966 "Failed to submit urb - res %d\n", result); 1967 return result; 1968 } 1969 1970 return count; 1971 } 1972 1973 /* callback after read or write on muxed serial port */ 1974 static void ctrl_callback(struct urb *urb) 1975 { 1976 struct hso_serial *serial = urb->context; 1977 struct usb_ctrlrequest *req; 1978 int status = urb->status; 1979 1980 /* sanity check */ 1981 if (!serial) 1982 return; 1983 1984 spin_lock(&serial->serial_lock); 1985 serial->tx_urb_used = 0; 1986 spin_unlock(&serial->serial_lock); 1987 if (status) { 1988 handle_usb_error(status, __func__, serial->parent); 1989 return; 1990 } 1991 1992 /* what request? */ 1993 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1994 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1995 D4("Actual length of urb = %d\n", urb->actual_length); 1996 DUMP1(urb->transfer_buffer, urb->actual_length); 1997 1998 if (req->bRequestType == 1999 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2000 /* response to a read command */ 2001 serial->rx_urb_filled[0] = 1; 2002 spin_lock(&serial->serial_lock); 2003 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2004 spin_unlock(&serial->serial_lock); 2005 } else { 2006 hso_put_activity(serial->parent); 2007 tty_port_tty_wakeup(&serial->port); 2008 /* response to a write command */ 2009 hso_kick_transmit(serial); 2010 } 2011 } 2012 2013 /* handle RX data for serial port */ 2014 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2015 { 2016 struct tty_struct *tty; 2017 int write_length_remaining = 0; 2018 int curr_write_len; 2019 2020 /* Sanity check */ 2021 if (urb == NULL || serial == NULL) { 2022 D1("serial = NULL"); 2023 return -2; 2024 } 2025 2026 tty = tty_port_tty_get(&serial->port); 2027 2028 /* Push data to tty */ 2029 write_length_remaining = urb->actual_length - 2030 serial->curr_rx_urb_offset; 2031 D1("data to push to tty"); 2032 while (write_length_remaining) { 2033 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2034 tty_kref_put(tty); 2035 return -1; 2036 } 2037 curr_write_len = tty_insert_flip_string(&serial->port, 2038 urb->transfer_buffer + serial->curr_rx_urb_offset, 2039 write_length_remaining); 2040 serial->curr_rx_urb_offset += curr_write_len; 2041 write_length_remaining -= curr_write_len; 2042 tty_flip_buffer_push(&serial->port); 2043 } 2044 tty_kref_put(tty); 2045 2046 if (write_length_remaining == 0) { 2047 serial->curr_rx_urb_offset = 0; 2048 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2049 } 2050 return write_length_remaining; 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 serial->curr_rx_urb_offset = 0; 2222 2223 if (serial->tx_urb) 2224 usb_kill_urb(serial->tx_urb); 2225 2226 if (serial->shared_int) { 2227 mutex_lock(&serial->shared_int->shared_int_lock); 2228 if (serial->shared_int->use_count && 2229 (--serial->shared_int->use_count == 0)) { 2230 struct urb *urb; 2231 2232 urb = serial->shared_int->shared_intr_urb; 2233 if (urb) 2234 usb_kill_urb(urb); 2235 } 2236 mutex_unlock(&serial->shared_int->shared_int_lock); 2237 } 2238 tiocmget = serial->tiocmget; 2239 if (tiocmget) { 2240 wake_up_interruptible(&tiocmget->waitq); 2241 usb_kill_urb(tiocmget->urb); 2242 } 2243 2244 return 0; 2245 } 2246 2247 static void hso_serial_common_free(struct hso_serial *serial) 2248 { 2249 int i; 2250 2251 if (serial->parent->dev) 2252 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2253 2254 tty_unregister_device(tty_drv, serial->minor); 2255 2256 for (i = 0; i < serial->num_rx_urbs; i++) { 2257 /* unlink and free RX URB */ 2258 usb_free_urb(serial->rx_urb[i]); 2259 /* free the RX buffer */ 2260 kfree(serial->rx_data[i]); 2261 } 2262 2263 /* unlink and free TX URB */ 2264 usb_free_urb(serial->tx_urb); 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 struct device *dev; 2273 int minor; 2274 int i; 2275 2276 tty_port_init(&serial->port); 2277 2278 minor = get_free_serial_index(); 2279 if (minor < 0) 2280 goto exit; 2281 2282 /* register our minor number */ 2283 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv, 2284 minor, &serial->parent->interface->dev); 2285 dev = serial->parent->dev; 2286 dev_set_drvdata(dev, serial->parent); 2287 i = device_create_file(dev, &dev_attr_hsotype); 2288 2289 /* fill in specific data for later use */ 2290 serial->minor = minor; 2291 serial->magic = HSO_SERIAL_MAGIC; 2292 spin_lock_init(&serial->serial_lock); 2293 serial->num_rx_urbs = num_urbs; 2294 2295 /* RX, allocate urb and initialize */ 2296 2297 /* prepare our RX buffer */ 2298 serial->rx_data_length = rx_size; 2299 for (i = 0; i < serial->num_rx_urbs; i++) { 2300 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2301 if (!serial->rx_urb[i]) { 2302 dev_err(dev, "Could not allocate urb?\n"); 2303 goto exit; 2304 } 2305 serial->rx_urb[i]->transfer_buffer = NULL; 2306 serial->rx_urb[i]->transfer_buffer_length = 0; 2307 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2308 GFP_KERNEL); 2309 if (!serial->rx_data[i]) 2310 goto exit; 2311 } 2312 2313 /* TX, allocate urb and initialize */ 2314 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2315 if (!serial->tx_urb) { 2316 dev_err(dev, "Could not allocate urb?\n"); 2317 goto exit; 2318 } 2319 serial->tx_urb->transfer_buffer = NULL; 2320 serial->tx_urb->transfer_buffer_length = 0; 2321 /* prepare our TX buffer */ 2322 serial->tx_data_count = 0; 2323 serial->tx_buffer_count = 0; 2324 serial->tx_data_length = tx_size; 2325 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2326 if (!serial->tx_data) 2327 goto exit; 2328 2329 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2330 if (!serial->tx_buffer) 2331 goto exit; 2332 2333 return 0; 2334 exit: 2335 hso_serial_common_free(serial); 2336 return -1; 2337 } 2338 2339 /* Creates a general hso device */ 2340 static struct hso_device *hso_create_device(struct usb_interface *intf, 2341 int port_spec) 2342 { 2343 struct hso_device *hso_dev; 2344 2345 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2346 if (!hso_dev) 2347 return NULL; 2348 2349 hso_dev->port_spec = port_spec; 2350 hso_dev->usb = interface_to_usbdev(intf); 2351 hso_dev->interface = intf; 2352 kref_init(&hso_dev->ref); 2353 mutex_init(&hso_dev->mutex); 2354 2355 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2356 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2357 INIT_WORK(&hso_dev->reset_device, reset_device); 2358 2359 return hso_dev; 2360 } 2361 2362 /* Removes a network device in the network device table */ 2363 static int remove_net_device(struct hso_device *hso_dev) 2364 { 2365 int i; 2366 2367 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2368 if (network_table[i] == hso_dev) { 2369 network_table[i] = NULL; 2370 break; 2371 } 2372 } 2373 if (i == HSO_MAX_NET_DEVICES) 2374 return -1; 2375 return 0; 2376 } 2377 2378 /* Frees our network device */ 2379 static void hso_free_net_device(struct hso_device *hso_dev) 2380 { 2381 int i; 2382 struct hso_net *hso_net = dev2net(hso_dev); 2383 2384 if (!hso_net) 2385 return; 2386 2387 remove_net_device(hso_net->parent); 2388 2389 if (hso_net->net) 2390 unregister_netdev(hso_net->net); 2391 2392 /* start freeing */ 2393 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2394 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2395 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2396 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2397 } 2398 usb_free_urb(hso_net->mux_bulk_tx_urb); 2399 kfree(hso_net->mux_bulk_tx_buf); 2400 hso_net->mux_bulk_tx_buf = NULL; 2401 2402 if (hso_net->net) 2403 free_netdev(hso_net->net); 2404 2405 kfree(hso_dev); 2406 } 2407 2408 static const struct net_device_ops hso_netdev_ops = { 2409 .ndo_open = hso_net_open, 2410 .ndo_stop = hso_net_close, 2411 .ndo_start_xmit = hso_net_start_xmit, 2412 .ndo_tx_timeout = hso_net_tx_timeout, 2413 }; 2414 2415 /* initialize the network interface */ 2416 static void hso_net_init(struct net_device *net) 2417 { 2418 struct hso_net *hso_net = netdev_priv(net); 2419 2420 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2421 2422 /* fill in the other fields */ 2423 net->netdev_ops = &hso_netdev_ops; 2424 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2425 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2426 net->type = ARPHRD_NONE; 2427 net->mtu = DEFAULT_MTU - 14; 2428 net->tx_queue_len = 10; 2429 SET_ETHTOOL_OPS(net, &ops); 2430 2431 /* and initialize the semaphore */ 2432 spin_lock_init(&hso_net->net_lock); 2433 } 2434 2435 /* Adds a network device in the network device table */ 2436 static int add_net_device(struct hso_device *hso_dev) 2437 { 2438 int i; 2439 2440 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2441 if (network_table[i] == NULL) { 2442 network_table[i] = hso_dev; 2443 break; 2444 } 2445 } 2446 if (i == HSO_MAX_NET_DEVICES) 2447 return -1; 2448 return 0; 2449 } 2450 2451 static int hso_rfkill_set_block(void *data, bool blocked) 2452 { 2453 struct hso_device *hso_dev = data; 2454 int enabled = !blocked; 2455 int rv; 2456 2457 mutex_lock(&hso_dev->mutex); 2458 if (hso_dev->usb_gone) 2459 rv = 0; 2460 else 2461 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2462 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2463 USB_CTRL_SET_TIMEOUT); 2464 mutex_unlock(&hso_dev->mutex); 2465 return rv; 2466 } 2467 2468 static const struct rfkill_ops hso_rfkill_ops = { 2469 .set_block = hso_rfkill_set_block, 2470 }; 2471 2472 /* Creates and sets up everything for rfkill */ 2473 static void hso_create_rfkill(struct hso_device *hso_dev, 2474 struct usb_interface *interface) 2475 { 2476 struct hso_net *hso_net = dev2net(hso_dev); 2477 struct device *dev = &hso_net->net->dev; 2478 char *rfkn; 2479 2480 rfkn = kzalloc(20, GFP_KERNEL); 2481 if (!rfkn) 2482 dev_err(dev, "%s - Out of memory\n", __func__); 2483 2484 snprintf(rfkn, 20, "hso-%d", 2485 interface->altsetting->desc.bInterfaceNumber); 2486 2487 hso_net->rfkill = rfkill_alloc(rfkn, 2488 &interface_to_usbdev(interface)->dev, 2489 RFKILL_TYPE_WWAN, 2490 &hso_rfkill_ops, hso_dev); 2491 if (!hso_net->rfkill) { 2492 dev_err(dev, "%s - Out of memory\n", __func__); 2493 kfree(rfkn); 2494 return; 2495 } 2496 if (rfkill_register(hso_net->rfkill) < 0) { 2497 rfkill_destroy(hso_net->rfkill); 2498 kfree(rfkn); 2499 hso_net->rfkill = NULL; 2500 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2501 return; 2502 } 2503 } 2504 2505 static struct device_type hso_type = { 2506 .name = "wwan", 2507 }; 2508 2509 /* Creates our network device */ 2510 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2511 int port_spec) 2512 { 2513 int result, i; 2514 struct net_device *net; 2515 struct hso_net *hso_net; 2516 struct hso_device *hso_dev; 2517 2518 hso_dev = hso_create_device(interface, port_spec); 2519 if (!hso_dev) 2520 return NULL; 2521 2522 /* allocate our network device, then we can put in our private data */ 2523 /* call hso_net_init to do the basic initialization */ 2524 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2525 if (!net) { 2526 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2527 goto exit; 2528 } 2529 2530 hso_net = netdev_priv(net); 2531 2532 hso_dev->port_data.dev_net = hso_net; 2533 hso_net->net = net; 2534 hso_net->parent = hso_dev; 2535 2536 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2537 USB_DIR_IN); 2538 if (!hso_net->in_endp) { 2539 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2540 goto exit; 2541 } 2542 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2543 USB_DIR_OUT); 2544 if (!hso_net->out_endp) { 2545 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2546 goto exit; 2547 } 2548 SET_NETDEV_DEV(net, &interface->dev); 2549 SET_NETDEV_DEVTYPE(net, &hso_type); 2550 2551 /* registering our net device */ 2552 result = register_netdev(net); 2553 if (result) { 2554 dev_err(&interface->dev, "Failed to register device\n"); 2555 goto exit; 2556 } 2557 2558 /* start allocating */ 2559 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2560 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2561 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2562 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2563 goto exit; 2564 } 2565 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2566 GFP_KERNEL); 2567 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2568 goto exit; 2569 } 2570 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2571 if (!hso_net->mux_bulk_tx_urb) { 2572 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2573 goto exit; 2574 } 2575 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2576 if (!hso_net->mux_bulk_tx_buf) 2577 goto exit; 2578 2579 add_net_device(hso_dev); 2580 2581 hso_log_port(hso_dev); 2582 2583 hso_create_rfkill(hso_dev, interface); 2584 2585 return hso_dev; 2586 exit: 2587 hso_free_net_device(hso_dev); 2588 return NULL; 2589 } 2590 2591 static void hso_free_tiomget(struct hso_serial *serial) 2592 { 2593 struct hso_tiocmget *tiocmget; 2594 if (!serial) 2595 return; 2596 tiocmget = serial->tiocmget; 2597 if (tiocmget) { 2598 usb_free_urb(tiocmget->urb); 2599 tiocmget->urb = NULL; 2600 serial->tiocmget = NULL; 2601 kfree(tiocmget); 2602 } 2603 } 2604 2605 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2606 static void hso_free_serial_device(struct hso_device *hso_dev) 2607 { 2608 struct hso_serial *serial = dev2ser(hso_dev); 2609 2610 if (!serial) 2611 return; 2612 set_serial_by_index(serial->minor, NULL); 2613 2614 hso_serial_common_free(serial); 2615 2616 if (serial->shared_int) { 2617 mutex_lock(&serial->shared_int->shared_int_lock); 2618 if (--serial->shared_int->ref_count == 0) 2619 hso_free_shared_int(serial->shared_int); 2620 else 2621 mutex_unlock(&serial->shared_int->shared_int_lock); 2622 } 2623 hso_free_tiomget(serial); 2624 kfree(serial); 2625 kfree(hso_dev); 2626 } 2627 2628 /* Creates a bulk AT channel */ 2629 static struct hso_device *hso_create_bulk_serial_device( 2630 struct usb_interface *interface, int port) 2631 { 2632 struct hso_device *hso_dev; 2633 struct hso_serial *serial; 2634 int num_urbs; 2635 struct hso_tiocmget *tiocmget; 2636 2637 hso_dev = hso_create_device(interface, port); 2638 if (!hso_dev) 2639 return NULL; 2640 2641 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2642 if (!serial) 2643 goto exit; 2644 2645 serial->parent = hso_dev; 2646 hso_dev->port_data.dev_serial = serial; 2647 2648 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2649 num_urbs = 2; 2650 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2651 GFP_KERNEL); 2652 /* it isn't going to break our heart if serial->tiocmget 2653 * allocation fails don't bother checking this. 2654 */ 2655 if (serial->tiocmget) { 2656 tiocmget = serial->tiocmget; 2657 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2658 if (tiocmget->urb) { 2659 mutex_init(&tiocmget->mutex); 2660 init_waitqueue_head(&tiocmget->waitq); 2661 tiocmget->endp = hso_get_ep( 2662 interface, 2663 USB_ENDPOINT_XFER_INT, 2664 USB_DIR_IN); 2665 } else 2666 hso_free_tiomget(serial); 2667 } 2668 } 2669 else 2670 num_urbs = 1; 2671 2672 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2673 BULK_URB_TX_SIZE)) 2674 goto exit; 2675 2676 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2677 USB_DIR_IN); 2678 if (!serial->in_endp) { 2679 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2680 goto exit2; 2681 } 2682 2683 if (! 2684 (serial->out_endp = 2685 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2686 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2687 goto exit2; 2688 } 2689 2690 serial->write_data = hso_std_serial_write_data; 2691 2692 /* and record this serial */ 2693 set_serial_by_index(serial->minor, serial); 2694 2695 /* setup the proc dirs and files if needed */ 2696 hso_log_port(hso_dev); 2697 2698 /* done, return it */ 2699 return hso_dev; 2700 2701 exit2: 2702 hso_serial_common_free(serial); 2703 exit: 2704 hso_free_tiomget(serial); 2705 kfree(serial); 2706 kfree(hso_dev); 2707 return NULL; 2708 } 2709 2710 /* Creates a multiplexed AT channel */ 2711 static 2712 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2713 int port, 2714 struct hso_shared_int *mux) 2715 { 2716 struct hso_device *hso_dev; 2717 struct hso_serial *serial; 2718 int port_spec; 2719 2720 port_spec = HSO_INTF_MUX; 2721 port_spec &= ~HSO_PORT_MASK; 2722 2723 port_spec |= hso_mux_to_port(port); 2724 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2725 return NULL; 2726 2727 hso_dev = hso_create_device(interface, port_spec); 2728 if (!hso_dev) 2729 return NULL; 2730 2731 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2732 if (!serial) 2733 goto exit; 2734 2735 hso_dev->port_data.dev_serial = serial; 2736 serial->parent = hso_dev; 2737 2738 if (hso_serial_common_create 2739 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2740 goto exit; 2741 2742 serial->tx_data_length--; 2743 serial->write_data = hso_mux_serial_write_data; 2744 2745 serial->shared_int = mux; 2746 mutex_lock(&serial->shared_int->shared_int_lock); 2747 serial->shared_int->ref_count++; 2748 mutex_unlock(&serial->shared_int->shared_int_lock); 2749 2750 /* and record this serial */ 2751 set_serial_by_index(serial->minor, serial); 2752 2753 /* setup the proc dirs and files if needed */ 2754 hso_log_port(hso_dev); 2755 2756 /* done, return it */ 2757 return hso_dev; 2758 2759 exit: 2760 if (serial) { 2761 tty_unregister_device(tty_drv, serial->minor); 2762 kfree(serial); 2763 } 2764 if (hso_dev) 2765 kfree(hso_dev); 2766 return NULL; 2767 2768 } 2769 2770 static void hso_free_shared_int(struct hso_shared_int *mux) 2771 { 2772 usb_free_urb(mux->shared_intr_urb); 2773 kfree(mux->shared_intr_buf); 2774 mutex_unlock(&mux->shared_int_lock); 2775 kfree(mux); 2776 } 2777 2778 static 2779 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2780 { 2781 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2782 2783 if (!mux) 2784 return NULL; 2785 2786 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2787 USB_DIR_IN); 2788 if (!mux->intr_endp) { 2789 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2790 goto exit; 2791 } 2792 2793 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2794 if (!mux->shared_intr_urb) { 2795 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2796 goto exit; 2797 } 2798 mux->shared_intr_buf = 2799 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2800 GFP_KERNEL); 2801 if (!mux->shared_intr_buf) 2802 goto exit; 2803 2804 mutex_init(&mux->shared_int_lock); 2805 2806 return mux; 2807 2808 exit: 2809 kfree(mux->shared_intr_buf); 2810 usb_free_urb(mux->shared_intr_urb); 2811 kfree(mux); 2812 return NULL; 2813 } 2814 2815 /* Gets the port spec for a certain interface */ 2816 static int hso_get_config_data(struct usb_interface *interface) 2817 { 2818 struct usb_device *usbdev = interface_to_usbdev(interface); 2819 u8 config_data[17]; 2820 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2821 s32 result; 2822 2823 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2824 0x86, 0xC0, 0, 0, config_data, 17, 2825 USB_CTRL_SET_TIMEOUT) != 0x11) { 2826 return -EIO; 2827 } 2828 2829 switch (config_data[if_num]) { 2830 case 0x0: 2831 result = 0; 2832 break; 2833 case 0x1: 2834 result = HSO_PORT_DIAG; 2835 break; 2836 case 0x2: 2837 result = HSO_PORT_GPS; 2838 break; 2839 case 0x3: 2840 result = HSO_PORT_GPS_CONTROL; 2841 break; 2842 case 0x4: 2843 result = HSO_PORT_APP; 2844 break; 2845 case 0x5: 2846 result = HSO_PORT_APP2; 2847 break; 2848 case 0x6: 2849 result = HSO_PORT_CONTROL; 2850 break; 2851 case 0x7: 2852 result = HSO_PORT_NETWORK; 2853 break; 2854 case 0x8: 2855 result = HSO_PORT_MODEM; 2856 break; 2857 case 0x9: 2858 result = HSO_PORT_MSD; 2859 break; 2860 case 0xa: 2861 result = HSO_PORT_PCSC; 2862 break; 2863 case 0xb: 2864 result = HSO_PORT_VOICE; 2865 break; 2866 default: 2867 result = 0; 2868 } 2869 2870 if (result) 2871 result |= HSO_INTF_BULK; 2872 2873 if (config_data[16] & 0x1) 2874 result |= HSO_INFO_CRC_BUG; 2875 2876 return result; 2877 } 2878 2879 /* called once for each interface upon device insertion */ 2880 static int hso_probe(struct usb_interface *interface, 2881 const struct usb_device_id *id) 2882 { 2883 int mux, i, if_num, port_spec; 2884 unsigned char port_mask; 2885 struct hso_device *hso_dev = NULL; 2886 struct hso_shared_int *shared_int; 2887 struct hso_device *tmp_dev = NULL; 2888 2889 if_num = interface->altsetting->desc.bInterfaceNumber; 2890 2891 /* Get the interface/port specification from either driver_info or from 2892 * the device itself */ 2893 if (id->driver_info) 2894 port_spec = ((u32 *)(id->driver_info))[if_num]; 2895 else 2896 port_spec = hso_get_config_data(interface); 2897 2898 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2899 dev_err(&interface->dev, "Not our interface\n"); 2900 return -ENODEV; 2901 } 2902 /* Check if we need to switch to alt interfaces prior to port 2903 * configuration */ 2904 if (interface->num_altsetting > 1) 2905 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2906 interface->needs_remote_wakeup = 1; 2907 2908 /* Allocate new hso device(s) */ 2909 switch (port_spec & HSO_INTF_MASK) { 2910 case HSO_INTF_MUX: 2911 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2912 /* Create the network device */ 2913 if (!disable_net) { 2914 hso_dev = hso_create_net_device(interface, 2915 port_spec); 2916 if (!hso_dev) 2917 goto exit; 2918 tmp_dev = hso_dev; 2919 } 2920 } 2921 2922 if (hso_get_mux_ports(interface, &port_mask)) 2923 /* TODO: de-allocate everything */ 2924 goto exit; 2925 2926 shared_int = hso_create_shared_int(interface); 2927 if (!shared_int) 2928 goto exit; 2929 2930 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2931 if (port_mask & i) { 2932 hso_dev = hso_create_mux_serial_device( 2933 interface, i, shared_int); 2934 if (!hso_dev) 2935 goto exit; 2936 } 2937 } 2938 2939 if (tmp_dev) 2940 hso_dev = tmp_dev; 2941 break; 2942 2943 case HSO_INTF_BULK: 2944 /* It's a regular bulk interface */ 2945 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2946 if (!disable_net) 2947 hso_dev = 2948 hso_create_net_device(interface, port_spec); 2949 } else { 2950 hso_dev = 2951 hso_create_bulk_serial_device(interface, port_spec); 2952 } 2953 if (!hso_dev) 2954 goto exit; 2955 break; 2956 default: 2957 goto exit; 2958 } 2959 2960 /* save our data pointer in this device */ 2961 usb_set_intfdata(interface, hso_dev); 2962 2963 /* done */ 2964 return 0; 2965 exit: 2966 hso_free_interface(interface); 2967 return -ENODEV; 2968 } 2969 2970 /* device removed, cleaning up */ 2971 static void hso_disconnect(struct usb_interface *interface) 2972 { 2973 hso_free_interface(interface); 2974 2975 /* remove reference of our private data */ 2976 usb_set_intfdata(interface, NULL); 2977 } 2978 2979 static void async_get_intf(struct work_struct *data) 2980 { 2981 struct hso_device *hso_dev = 2982 container_of(data, struct hso_device, async_get_intf); 2983 usb_autopm_get_interface(hso_dev->interface); 2984 } 2985 2986 static void async_put_intf(struct work_struct *data) 2987 { 2988 struct hso_device *hso_dev = 2989 container_of(data, struct hso_device, async_put_intf); 2990 usb_autopm_put_interface(hso_dev->interface); 2991 } 2992 2993 static int hso_get_activity(struct hso_device *hso_dev) 2994 { 2995 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2996 if (!hso_dev->is_active) { 2997 hso_dev->is_active = 1; 2998 schedule_work(&hso_dev->async_get_intf); 2999 } 3000 } 3001 3002 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3003 return -EAGAIN; 3004 3005 usb_mark_last_busy(hso_dev->usb); 3006 3007 return 0; 3008 } 3009 3010 static int hso_put_activity(struct hso_device *hso_dev) 3011 { 3012 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3013 if (hso_dev->is_active) { 3014 hso_dev->is_active = 0; 3015 schedule_work(&hso_dev->async_put_intf); 3016 return -EAGAIN; 3017 } 3018 } 3019 hso_dev->is_active = 0; 3020 return 0; 3021 } 3022 3023 /* called by kernel when we need to suspend device */ 3024 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3025 { 3026 int i, result; 3027 3028 /* Stop all serial ports */ 3029 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3030 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3031 result = hso_stop_serial_device(serial_table[i]); 3032 if (result) 3033 goto out; 3034 } 3035 } 3036 3037 /* Stop all network ports */ 3038 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3039 if (network_table[i] && 3040 (network_table[i]->interface == iface)) { 3041 result = hso_stop_net_device(network_table[i]); 3042 if (result) 3043 goto out; 3044 } 3045 } 3046 3047 out: 3048 return 0; 3049 } 3050 3051 /* called by kernel when we need to resume device */ 3052 static int hso_resume(struct usb_interface *iface) 3053 { 3054 int i, result = 0; 3055 struct hso_net *hso_net; 3056 3057 /* Start all serial ports */ 3058 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3059 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3060 if (dev2ser(serial_table[i])->port.count) { 3061 result = 3062 hso_start_serial_device(serial_table[i], GFP_NOIO); 3063 hso_kick_transmit(dev2ser(serial_table[i])); 3064 if (result) 3065 goto out; 3066 } 3067 } 3068 } 3069 3070 /* Start all network ports */ 3071 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3072 if (network_table[i] && 3073 (network_table[i]->interface == iface)) { 3074 hso_net = dev2net(network_table[i]); 3075 if (hso_net->flags & IFF_UP) { 3076 /* First transmit any lingering data, 3077 then restart the device. */ 3078 if (hso_net->skb_tx_buf) { 3079 dev_dbg(&iface->dev, 3080 "Transmitting" 3081 " lingering data\n"); 3082 hso_net_start_xmit(hso_net->skb_tx_buf, 3083 hso_net->net); 3084 hso_net->skb_tx_buf = NULL; 3085 } 3086 result = hso_start_net_device(network_table[i]); 3087 if (result) 3088 goto out; 3089 } 3090 } 3091 } 3092 3093 out: 3094 return result; 3095 } 3096 3097 static void reset_device(struct work_struct *data) 3098 { 3099 struct hso_device *hso_dev = 3100 container_of(data, struct hso_device, reset_device); 3101 struct usb_device *usb = hso_dev->usb; 3102 int result; 3103 3104 if (hso_dev->usb_gone) { 3105 D1("No reset during disconnect\n"); 3106 } else { 3107 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3108 if (result < 0) 3109 D1("unable to lock device for reset: %d\n", result); 3110 else { 3111 usb_reset_device(usb); 3112 usb_unlock_device(usb); 3113 } 3114 } 3115 } 3116 3117 static void hso_serial_ref_free(struct kref *ref) 3118 { 3119 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3120 3121 hso_free_serial_device(hso_dev); 3122 } 3123 3124 static void hso_free_interface(struct usb_interface *interface) 3125 { 3126 struct hso_serial *hso_dev; 3127 int i; 3128 3129 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3130 if (serial_table[i] && 3131 (serial_table[i]->interface == interface)) { 3132 hso_dev = dev2ser(serial_table[i]); 3133 tty_port_tty_hangup(&hso_dev->port, false); 3134 mutex_lock(&hso_dev->parent->mutex); 3135 hso_dev->parent->usb_gone = 1; 3136 mutex_unlock(&hso_dev->parent->mutex); 3137 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3138 } 3139 } 3140 3141 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3142 if (network_table[i] && 3143 (network_table[i]->interface == interface)) { 3144 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3145 /* hso_stop_net_device doesn't stop the net queue since 3146 * traffic needs to start it again when suspended */ 3147 netif_stop_queue(dev2net(network_table[i])->net); 3148 hso_stop_net_device(network_table[i]); 3149 cancel_work_sync(&network_table[i]->async_put_intf); 3150 cancel_work_sync(&network_table[i]->async_get_intf); 3151 if (rfk) { 3152 rfkill_unregister(rfk); 3153 rfkill_destroy(rfk); 3154 } 3155 hso_free_net_device(network_table[i]); 3156 } 3157 } 3158 } 3159 3160 /* Helper functions */ 3161 3162 /* Get the endpoint ! */ 3163 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3164 int type, int dir) 3165 { 3166 int i; 3167 struct usb_host_interface *iface = intf->cur_altsetting; 3168 struct usb_endpoint_descriptor *endp; 3169 3170 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3171 endp = &iface->endpoint[i].desc; 3172 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3173 (usb_endpoint_type(endp) == type)) 3174 return endp; 3175 } 3176 3177 return NULL; 3178 } 3179 3180 /* Get the byte that describes which ports are enabled */ 3181 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3182 { 3183 int i; 3184 struct usb_host_interface *iface = intf->cur_altsetting; 3185 3186 if (iface->extralen == 3) { 3187 *ports = iface->extra[2]; 3188 return 0; 3189 } 3190 3191 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3192 if (iface->endpoint[i].extralen == 3) { 3193 *ports = iface->endpoint[i].extra[2]; 3194 return 0; 3195 } 3196 } 3197 3198 return -1; 3199 } 3200 3201 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3202 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3203 struct usb_device *usb, gfp_t gfp) 3204 { 3205 int result; 3206 3207 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3208 usb_rcvintpipe(usb, 3209 shared_int->intr_endp->bEndpointAddress & 0x7F), 3210 shared_int->shared_intr_buf, 3211 1, 3212 intr_callback, shared_int, 3213 shared_int->intr_endp->bInterval); 3214 3215 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3216 if (result) 3217 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3218 result); 3219 3220 return result; 3221 } 3222 3223 /* operations setup of the serial interface */ 3224 static const struct tty_operations hso_serial_ops = { 3225 .open = hso_serial_open, 3226 .close = hso_serial_close, 3227 .write = hso_serial_write, 3228 .write_room = hso_serial_write_room, 3229 .ioctl = hso_serial_ioctl, 3230 .set_termios = hso_serial_set_termios, 3231 .chars_in_buffer = hso_serial_chars_in_buffer, 3232 .tiocmget = hso_serial_tiocmget, 3233 .tiocmset = hso_serial_tiocmset, 3234 .get_icount = hso_get_count, 3235 .unthrottle = hso_unthrottle 3236 }; 3237 3238 static struct usb_driver hso_driver = { 3239 .name = driver_name, 3240 .probe = hso_probe, 3241 .disconnect = hso_disconnect, 3242 .id_table = hso_ids, 3243 .suspend = hso_suspend, 3244 .resume = hso_resume, 3245 .reset_resume = hso_resume, 3246 .supports_autosuspend = 1, 3247 .disable_hub_initiated_lpm = 1, 3248 }; 3249 3250 static int __init hso_init(void) 3251 { 3252 int i; 3253 int result; 3254 3255 /* put it in the log */ 3256 printk(KERN_INFO "hso: %s\n", version); 3257 3258 /* Initialise the serial table semaphore and table */ 3259 spin_lock_init(&serial_table_lock); 3260 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3261 serial_table[i] = NULL; 3262 3263 /* allocate our driver using the proper amount of supported minors */ 3264 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3265 if (!tty_drv) 3266 return -ENOMEM; 3267 3268 /* fill in all needed values */ 3269 tty_drv->driver_name = driver_name; 3270 tty_drv->name = tty_filename; 3271 3272 /* if major number is provided as parameter, use that one */ 3273 if (tty_major) 3274 tty_drv->major = tty_major; 3275 3276 tty_drv->minor_start = 0; 3277 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3278 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3279 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3280 tty_drv->init_termios = tty_std_termios; 3281 hso_init_termios(&tty_drv->init_termios); 3282 tty_set_operations(tty_drv, &hso_serial_ops); 3283 3284 /* register the tty driver */ 3285 result = tty_register_driver(tty_drv); 3286 if (result) { 3287 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3288 __func__, result); 3289 goto err_free_tty; 3290 } 3291 3292 /* register this module as an usb driver */ 3293 result = usb_register(&hso_driver); 3294 if (result) { 3295 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3296 result); 3297 goto err_unreg_tty; 3298 } 3299 3300 /* done */ 3301 return 0; 3302 err_unreg_tty: 3303 tty_unregister_driver(tty_drv); 3304 err_free_tty: 3305 put_tty_driver(tty_drv); 3306 return result; 3307 } 3308 3309 static void __exit hso_exit(void) 3310 { 3311 printk(KERN_INFO "hso: unloaded\n"); 3312 3313 tty_unregister_driver(tty_drv); 3314 put_tty_driver(tty_drv); 3315 /* deregister the usb driver */ 3316 usb_deregister(&hso_driver); 3317 } 3318 3319 /* Module definitions */ 3320 module_init(hso_init); 3321 module_exit(hso_exit); 3322 3323 MODULE_AUTHOR(MOD_AUTHOR); 3324 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3325 MODULE_LICENSE(MOD_LICENSE); 3326 3327 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3328 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3329 module_param(debug, int, S_IRUGO | S_IWUSR); 3330 3331 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3332 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3333 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3334 3335 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3336 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3337 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3338