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_LENGTH (0x2) 189 190 #define B_OVERRUN (0x1<<6) 191 #define B_PARITY (0x1<<5) 192 #define B_FRAMING (0x1<<4) 193 #define B_RING_SIGNAL (0x1<<3) 194 #define B_BREAK (0x1<<2) 195 #define B_TX_CARRIER (0x1<<1) 196 #define B_RX_CARRIER (0x1<<0) 197 198 struct hso_serial_state_notification { 199 u8 bmRequestType; 200 u8 bNotification; 201 u16 wValue; 202 u16 wIndex; 203 u16 wLength; 204 u16 UART_state_bitmap; 205 } __packed; 206 207 struct hso_tiocmget { 208 struct mutex mutex; 209 wait_queue_head_t waitq; 210 int intr_completed; 211 struct usb_endpoint_descriptor *endp; 212 struct urb *urb; 213 struct hso_serial_state_notification serial_state_notification; 214 u16 prev_UART_state_bitmap; 215 struct uart_icount icount; 216 }; 217 218 219 struct hso_serial { 220 struct hso_device *parent; 221 int magic; 222 u8 minor; 223 224 struct hso_shared_int *shared_int; 225 226 /* rx/tx urb could be either a bulk urb or a control urb depending 227 on which serial port it is used on. */ 228 struct urb *rx_urb[MAX_RX_URBS]; 229 u8 num_rx_urbs; 230 u8 *rx_data[MAX_RX_URBS]; 231 u16 rx_data_length; /* should contain allocated length */ 232 233 struct urb *tx_urb; 234 u8 *tx_data; 235 u8 *tx_buffer; 236 u16 tx_data_length; /* should contain allocated length */ 237 u16 tx_data_count; 238 u16 tx_buffer_count; 239 struct usb_ctrlrequest ctrl_req_tx; 240 struct usb_ctrlrequest ctrl_req_rx; 241 242 struct usb_endpoint_descriptor *in_endp; 243 struct usb_endpoint_descriptor *out_endp; 244 245 enum rx_ctrl_state rx_state; 246 u8 rts_state; 247 u8 dtr_state; 248 unsigned tx_urb_used:1; 249 250 struct tty_port port; 251 /* from usb_serial_port */ 252 spinlock_t serial_lock; 253 254 int (*write_data) (struct hso_serial *serial); 255 struct hso_tiocmget *tiocmget; 256 /* Hacks required to get flow control 257 * working on the serial receive buffers 258 * so as not to drop characters on the floor. 259 */ 260 int curr_rx_urb_idx; 261 u16 curr_rx_urb_offset; 262 u8 rx_urb_filled[MAX_RX_URBS]; 263 struct tasklet_struct unthrottle_tasklet; 264 struct work_struct retry_unthrottle_workqueue; 265 }; 266 267 struct hso_device { 268 union { 269 struct hso_serial *dev_serial; 270 struct hso_net *dev_net; 271 } port_data; 272 273 u32 port_spec; 274 275 u8 is_active; 276 u8 usb_gone; 277 struct work_struct async_get_intf; 278 struct work_struct async_put_intf; 279 struct work_struct reset_device; 280 281 struct usb_device *usb; 282 struct usb_interface *interface; 283 284 struct device *dev; 285 struct kref ref; 286 struct mutex mutex; 287 }; 288 289 /* Type of interface */ 290 #define HSO_INTF_MASK 0xFF00 291 #define HSO_INTF_MUX 0x0100 292 #define HSO_INTF_BULK 0x0200 293 294 /* Type of port */ 295 #define HSO_PORT_MASK 0xFF 296 #define HSO_PORT_NO_PORT 0x0 297 #define HSO_PORT_CONTROL 0x1 298 #define HSO_PORT_APP 0x2 299 #define HSO_PORT_GPS 0x3 300 #define HSO_PORT_PCSC 0x4 301 #define HSO_PORT_APP2 0x5 302 #define HSO_PORT_GPS_CONTROL 0x6 303 #define HSO_PORT_MSD 0x7 304 #define HSO_PORT_VOICE 0x8 305 #define HSO_PORT_DIAG2 0x9 306 #define HSO_PORT_DIAG 0x10 307 #define HSO_PORT_MODEM 0x11 308 #define HSO_PORT_NETWORK 0x12 309 310 /* Additional device info */ 311 #define HSO_INFO_MASK 0xFF000000 312 #define HSO_INFO_CRC_BUG 0x01000000 313 314 /*****************************************************************************/ 315 /* Prototypes */ 316 /*****************************************************************************/ 317 /* Serial driver functions */ 318 static int hso_serial_tiocmset(struct tty_struct *tty, 319 unsigned int set, unsigned int clear); 320 static void ctrl_callback(struct urb *urb); 321 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 322 static void hso_kick_transmit(struct hso_serial *serial); 323 /* Helper functions */ 324 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 325 struct usb_device *usb, gfp_t gfp); 326 static void handle_usb_error(int status, const char *function, 327 struct hso_device *hso_dev); 328 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 329 int type, int dir); 330 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 331 static void hso_free_interface(struct usb_interface *intf); 332 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 333 static int hso_stop_serial_device(struct hso_device *hso_dev); 334 static int hso_start_net_device(struct hso_device *hso_dev); 335 static void hso_free_shared_int(struct hso_shared_int *shared_int); 336 static int hso_stop_net_device(struct hso_device *hso_dev); 337 static void hso_serial_ref_free(struct kref *ref); 338 static void hso_std_serial_read_bulk_callback(struct urb *urb); 339 static int hso_mux_serial_read(struct hso_serial *serial); 340 static void async_get_intf(struct work_struct *data); 341 static void async_put_intf(struct work_struct *data); 342 static int hso_put_activity(struct hso_device *hso_dev); 343 static int hso_get_activity(struct hso_device *hso_dev); 344 static void tiocmget_intr_callback(struct urb *urb); 345 static void reset_device(struct work_struct *data); 346 /*****************************************************************************/ 347 /* Helping functions */ 348 /*****************************************************************************/ 349 350 /* #define DEBUG */ 351 352 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 353 { 354 return hso_dev->port_data.dev_net; 355 } 356 357 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 358 { 359 return hso_dev->port_data.dev_serial; 360 } 361 362 /* Debugging functions */ 363 #ifdef DEBUG 364 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 365 unsigned int len) 366 { 367 static char name[255]; 368 369 sprintf(name, "hso[%d:%s]", line_count, func_name); 370 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 371 } 372 373 #define DUMP(buf_, len_) \ 374 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 375 376 #define DUMP1(buf_, len_) \ 377 do { \ 378 if (0x01 & debug) \ 379 DUMP(buf_, len_); \ 380 } while (0) 381 #else 382 #define DUMP(buf_, len_) 383 #define DUMP1(buf_, len_) 384 #endif 385 386 /* module parameters */ 387 static int debug; 388 static int tty_major; 389 static int disable_net; 390 391 /* driver info */ 392 static const char driver_name[] = "hso"; 393 static const char tty_filename[] = "ttyHS"; 394 static const char *version = __FILE__ ": " MOD_AUTHOR; 395 /* the usb driver itself (registered in hso_init) */ 396 static struct usb_driver hso_driver; 397 /* serial structures */ 398 static struct tty_driver *tty_drv; 399 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 400 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 401 static spinlock_t serial_table_lock; 402 403 static const s32 default_port_spec[] = { 404 HSO_INTF_MUX | HSO_PORT_NETWORK, 405 HSO_INTF_BULK | HSO_PORT_DIAG, 406 HSO_INTF_BULK | HSO_PORT_MODEM, 407 0 408 }; 409 410 static const s32 icon321_port_spec[] = { 411 HSO_INTF_MUX | HSO_PORT_NETWORK, 412 HSO_INTF_BULK | HSO_PORT_DIAG2, 413 HSO_INTF_BULK | HSO_PORT_MODEM, 414 HSO_INTF_BULK | HSO_PORT_DIAG, 415 0 416 }; 417 418 #define default_port_device(vendor, product) \ 419 USB_DEVICE(vendor, product), \ 420 .driver_info = (kernel_ulong_t)default_port_spec 421 422 #define icon321_port_device(vendor, product) \ 423 USB_DEVICE(vendor, product), \ 424 .driver_info = (kernel_ulong_t)icon321_port_spec 425 426 /* list of devices we support */ 427 static const struct usb_device_id hso_ids[] = { 428 {default_port_device(0x0af0, 0x6711)}, 429 {default_port_device(0x0af0, 0x6731)}, 430 {default_port_device(0x0af0, 0x6751)}, 431 {default_port_device(0x0af0, 0x6771)}, 432 {default_port_device(0x0af0, 0x6791)}, 433 {default_port_device(0x0af0, 0x6811)}, 434 {default_port_device(0x0af0, 0x6911)}, 435 {default_port_device(0x0af0, 0x6951)}, 436 {default_port_device(0x0af0, 0x6971)}, 437 {default_port_device(0x0af0, 0x7011)}, 438 {default_port_device(0x0af0, 0x7031)}, 439 {default_port_device(0x0af0, 0x7051)}, 440 {default_port_device(0x0af0, 0x7071)}, 441 {default_port_device(0x0af0, 0x7111)}, 442 {default_port_device(0x0af0, 0x7211)}, 443 {default_port_device(0x0af0, 0x7251)}, 444 {default_port_device(0x0af0, 0x7271)}, 445 {default_port_device(0x0af0, 0x7311)}, 446 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 447 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 448 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 449 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 450 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 451 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 452 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 453 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 454 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 455 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 456 {USB_DEVICE(0x0af0, 0x7701)}, 457 {USB_DEVICE(0x0af0, 0x7706)}, 458 {USB_DEVICE(0x0af0, 0x7801)}, 459 {USB_DEVICE(0x0af0, 0x7901)}, 460 {USB_DEVICE(0x0af0, 0x7A01)}, 461 {USB_DEVICE(0x0af0, 0x7A05)}, 462 {USB_DEVICE(0x0af0, 0x8200)}, 463 {USB_DEVICE(0x0af0, 0x8201)}, 464 {USB_DEVICE(0x0af0, 0x8300)}, 465 {USB_DEVICE(0x0af0, 0x8302)}, 466 {USB_DEVICE(0x0af0, 0x8304)}, 467 {USB_DEVICE(0x0af0, 0x8400)}, 468 {USB_DEVICE(0x0af0, 0x8600)}, 469 {USB_DEVICE(0x0af0, 0x8800)}, 470 {USB_DEVICE(0x0af0, 0x8900)}, 471 {USB_DEVICE(0x0af0, 0x9000)}, 472 {USB_DEVICE(0x0af0, 0xd035)}, 473 {USB_DEVICE(0x0af0, 0xd055)}, 474 {USB_DEVICE(0x0af0, 0xd155)}, 475 {USB_DEVICE(0x0af0, 0xd255)}, 476 {USB_DEVICE(0x0af0, 0xd057)}, 477 {USB_DEVICE(0x0af0, 0xd157)}, 478 {USB_DEVICE(0x0af0, 0xd257)}, 479 {USB_DEVICE(0x0af0, 0xd357)}, 480 {USB_DEVICE(0x0af0, 0xd058)}, 481 {USB_DEVICE(0x0af0, 0xc100)}, 482 {} 483 }; 484 MODULE_DEVICE_TABLE(usb, hso_ids); 485 486 /* Sysfs attribute */ 487 static ssize_t hso_sysfs_show_porttype(struct device *dev, 488 struct device_attribute *attr, 489 char *buf) 490 { 491 struct hso_device *hso_dev = dev_get_drvdata(dev); 492 char *port_name; 493 494 if (!hso_dev) 495 return 0; 496 497 switch (hso_dev->port_spec & HSO_PORT_MASK) { 498 case HSO_PORT_CONTROL: 499 port_name = "Control"; 500 break; 501 case HSO_PORT_APP: 502 port_name = "Application"; 503 break; 504 case HSO_PORT_APP2: 505 port_name = "Application2"; 506 break; 507 case HSO_PORT_GPS: 508 port_name = "GPS"; 509 break; 510 case HSO_PORT_GPS_CONTROL: 511 port_name = "GPS Control"; 512 break; 513 case HSO_PORT_PCSC: 514 port_name = "PCSC"; 515 break; 516 case HSO_PORT_DIAG: 517 port_name = "Diagnostic"; 518 break; 519 case HSO_PORT_DIAG2: 520 port_name = "Diagnostic2"; 521 break; 522 case HSO_PORT_MODEM: 523 port_name = "Modem"; 524 break; 525 case HSO_PORT_NETWORK: 526 port_name = "Network"; 527 break; 528 default: 529 port_name = "Unknown"; 530 break; 531 } 532 533 return sprintf(buf, "%s\n", port_name); 534 } 535 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 536 537 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 538 { 539 int idx; 540 541 for (idx = 0; idx < serial->num_rx_urbs; idx++) 542 if (serial->rx_urb[idx] == urb) 543 return idx; 544 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 545 return -1; 546 } 547 548 /* converts mux value to a port spec value */ 549 static u32 hso_mux_to_port(int mux) 550 { 551 u32 result; 552 553 switch (mux) { 554 case 0x1: 555 result = HSO_PORT_CONTROL; 556 break; 557 case 0x2: 558 result = HSO_PORT_APP; 559 break; 560 case 0x4: 561 result = HSO_PORT_PCSC; 562 break; 563 case 0x8: 564 result = HSO_PORT_GPS; 565 break; 566 case 0x10: 567 result = HSO_PORT_APP2; 568 break; 569 default: 570 result = HSO_PORT_NO_PORT; 571 } 572 return result; 573 } 574 575 /* converts port spec value to a mux value */ 576 static u32 hso_port_to_mux(int port) 577 { 578 u32 result; 579 580 switch (port & HSO_PORT_MASK) { 581 case HSO_PORT_CONTROL: 582 result = 0x0; 583 break; 584 case HSO_PORT_APP: 585 result = 0x1; 586 break; 587 case HSO_PORT_PCSC: 588 result = 0x2; 589 break; 590 case HSO_PORT_GPS: 591 result = 0x3; 592 break; 593 case HSO_PORT_APP2: 594 result = 0x4; 595 break; 596 default: 597 result = 0x0; 598 } 599 return result; 600 } 601 602 static struct hso_serial *get_serial_by_shared_int_and_type( 603 struct hso_shared_int *shared_int, 604 int mux) 605 { 606 int i, port; 607 608 port = hso_mux_to_port(mux); 609 610 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 611 if (serial_table[i] && 612 (dev2ser(serial_table[i])->shared_int == shared_int) && 613 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 614 return dev2ser(serial_table[i]); 615 } 616 } 617 618 return NULL; 619 } 620 621 static struct hso_serial *get_serial_by_index(unsigned index) 622 { 623 struct hso_serial *serial = NULL; 624 unsigned long flags; 625 626 spin_lock_irqsave(&serial_table_lock, flags); 627 if (serial_table[index]) 628 serial = dev2ser(serial_table[index]); 629 spin_unlock_irqrestore(&serial_table_lock, flags); 630 631 return serial; 632 } 633 634 static int get_free_serial_index(void) 635 { 636 int index; 637 unsigned long flags; 638 639 spin_lock_irqsave(&serial_table_lock, flags); 640 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 641 if (serial_table[index] == NULL) { 642 spin_unlock_irqrestore(&serial_table_lock, flags); 643 return index; 644 } 645 } 646 spin_unlock_irqrestore(&serial_table_lock, flags); 647 648 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 649 return -1; 650 } 651 652 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 653 { 654 unsigned long flags; 655 656 spin_lock_irqsave(&serial_table_lock, flags); 657 if (serial) 658 serial_table[index] = serial->parent; 659 else 660 serial_table[index] = NULL; 661 spin_unlock_irqrestore(&serial_table_lock, flags); 662 } 663 664 static void handle_usb_error(int status, const char *function, 665 struct hso_device *hso_dev) 666 { 667 char *explanation; 668 669 switch (status) { 670 case -ENODEV: 671 explanation = "no device"; 672 break; 673 case -ENOENT: 674 explanation = "endpoint not enabled"; 675 break; 676 case -EPIPE: 677 explanation = "endpoint stalled"; 678 break; 679 case -ENOSPC: 680 explanation = "not enough bandwidth"; 681 break; 682 case -ESHUTDOWN: 683 explanation = "device disabled"; 684 break; 685 case -EHOSTUNREACH: 686 explanation = "device suspended"; 687 break; 688 case -EINVAL: 689 case -EAGAIN: 690 case -EFBIG: 691 case -EMSGSIZE: 692 explanation = "internal error"; 693 break; 694 case -EILSEQ: 695 case -EPROTO: 696 case -ETIME: 697 case -ETIMEDOUT: 698 explanation = "protocol error"; 699 if (hso_dev) 700 schedule_work(&hso_dev->reset_device); 701 break; 702 default: 703 explanation = "unknown status"; 704 break; 705 } 706 707 /* log a meaningful explanation of an USB status */ 708 D1("%s: received USB status - %s (%d)", function, explanation, status); 709 } 710 711 /* Network interface functions */ 712 713 /* called when net interface is brought up by ifconfig */ 714 static int hso_net_open(struct net_device *net) 715 { 716 struct hso_net *odev = netdev_priv(net); 717 unsigned long flags = 0; 718 719 if (!odev) { 720 dev_err(&net->dev, "No net device !\n"); 721 return -ENODEV; 722 } 723 724 odev->skb_tx_buf = NULL; 725 726 /* setup environment */ 727 spin_lock_irqsave(&odev->net_lock, flags); 728 odev->rx_parse_state = WAIT_IP; 729 odev->rx_buf_size = 0; 730 odev->rx_buf_missing = sizeof(struct iphdr); 731 spin_unlock_irqrestore(&odev->net_lock, flags); 732 733 /* We are up and running. */ 734 set_bit(HSO_NET_RUNNING, &odev->flags); 735 hso_start_net_device(odev->parent); 736 737 /* Tell the kernel we are ready to start receiving from it */ 738 netif_start_queue(net); 739 740 return 0; 741 } 742 743 /* called when interface is brought down by ifconfig */ 744 static int hso_net_close(struct net_device *net) 745 { 746 struct hso_net *odev = netdev_priv(net); 747 748 /* we don't need the queue anymore */ 749 netif_stop_queue(net); 750 /* no longer running */ 751 clear_bit(HSO_NET_RUNNING, &odev->flags); 752 753 hso_stop_net_device(odev->parent); 754 755 /* done */ 756 return 0; 757 } 758 759 /* USB tells is xmit done, we should start the netqueue again */ 760 static void write_bulk_callback(struct urb *urb) 761 { 762 struct hso_net *odev = urb->context; 763 int status = urb->status; 764 765 /* Sanity check */ 766 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 767 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 768 return; 769 } 770 771 /* Do we still have a valid kernel network device? */ 772 if (!netif_device_present(odev->net)) { 773 dev_err(&urb->dev->dev, "%s: net device not present\n", 774 __func__); 775 return; 776 } 777 778 /* log status, but don't act on it, we don't need to resubmit anything 779 * anyhow */ 780 if (status) 781 handle_usb_error(status, __func__, odev->parent); 782 783 hso_put_activity(odev->parent); 784 785 /* Tell the network interface we are ready for another frame */ 786 netif_wake_queue(odev->net); 787 } 788 789 /* called by kernel when we need to transmit a packet */ 790 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 791 struct net_device *net) 792 { 793 struct hso_net *odev = netdev_priv(net); 794 int result; 795 796 /* Tell the kernel, "No more frames 'til we are done with this one." */ 797 netif_stop_queue(net); 798 if (hso_get_activity(odev->parent) == -EAGAIN) { 799 odev->skb_tx_buf = skb; 800 return NETDEV_TX_OK; 801 } 802 803 /* log if asked */ 804 DUMP1(skb->data, skb->len); 805 /* Copy it from kernel memory to OUR memory */ 806 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 807 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 808 809 /* Fill in the URB for shipping it out. */ 810 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 811 odev->parent->usb, 812 usb_sndbulkpipe(odev->parent->usb, 813 odev->out_endp-> 814 bEndpointAddress & 0x7F), 815 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 816 odev); 817 818 /* Deal with the Zero Length packet problem, I hope */ 819 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 820 821 /* Send the URB on its merry way. */ 822 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 823 if (result) { 824 dev_warn(&odev->parent->interface->dev, 825 "failed mux_bulk_tx_urb %d\n", result); 826 net->stats.tx_errors++; 827 netif_start_queue(net); 828 } else { 829 net->stats.tx_packets++; 830 net->stats.tx_bytes += skb->len; 831 } 832 dev_kfree_skb(skb); 833 /* we're done */ 834 return NETDEV_TX_OK; 835 } 836 837 static const struct ethtool_ops ops = { 838 .get_link = ethtool_op_get_link 839 }; 840 841 /* called when a packet did not ack after watchdogtimeout */ 842 static void hso_net_tx_timeout(struct net_device *net) 843 { 844 struct hso_net *odev = netdev_priv(net); 845 846 if (!odev) 847 return; 848 849 /* Tell syslog we are hosed. */ 850 dev_warn(&net->dev, "Tx timed out.\n"); 851 852 /* Tear the waiting frame off the list */ 853 if (odev->mux_bulk_tx_urb && 854 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 855 usb_unlink_urb(odev->mux_bulk_tx_urb); 856 857 /* Update statistics */ 858 net->stats.tx_errors++; 859 } 860 861 /* make a real packet from the received USB buffer */ 862 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 863 unsigned int count, unsigned char is_eop) 864 { 865 unsigned short temp_bytes; 866 unsigned short buffer_offset = 0; 867 unsigned short frame_len; 868 unsigned char *tmp_rx_buf; 869 870 /* log if needed */ 871 D1("Rx %d bytes", count); 872 DUMP(ip_pkt, min(128, (int)count)); 873 874 while (count) { 875 switch (odev->rx_parse_state) { 876 case WAIT_IP: 877 /* waiting for IP header. */ 878 /* wanted bytes - size of ip header */ 879 temp_bytes = 880 (count < 881 odev->rx_buf_missing) ? count : odev-> 882 rx_buf_missing; 883 884 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 885 odev->rx_buf_size, ip_pkt + buffer_offset, 886 temp_bytes); 887 888 odev->rx_buf_size += temp_bytes; 889 buffer_offset += temp_bytes; 890 odev->rx_buf_missing -= temp_bytes; 891 count -= temp_bytes; 892 893 if (!odev->rx_buf_missing) { 894 /* header is complete allocate an sk_buffer and 895 * continue to WAIT_DATA */ 896 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 897 898 if ((frame_len > DEFAULT_MRU) || 899 (frame_len < sizeof(struct iphdr))) { 900 dev_err(&odev->net->dev, 901 "Invalid frame (%d) length\n", 902 frame_len); 903 odev->rx_parse_state = WAIT_SYNC; 904 continue; 905 } 906 /* Allocate an sk_buff */ 907 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 908 frame_len); 909 if (!odev->skb_rx_buf) { 910 /* We got no receive buffer. */ 911 D1("could not allocate memory"); 912 odev->rx_parse_state = WAIT_SYNC; 913 return; 914 } 915 916 /* Copy what we got so far. make room for iphdr 917 * after tail. */ 918 tmp_rx_buf = 919 skb_put(odev->skb_rx_buf, 920 sizeof(struct iphdr)); 921 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 922 sizeof(struct iphdr)); 923 924 /* ETH_HLEN */ 925 odev->rx_buf_size = sizeof(struct iphdr); 926 927 /* Filip actually use .tot_len */ 928 odev->rx_buf_missing = 929 frame_len - sizeof(struct iphdr); 930 odev->rx_parse_state = WAIT_DATA; 931 } 932 break; 933 934 case WAIT_DATA: 935 temp_bytes = (count < odev->rx_buf_missing) 936 ? count : odev->rx_buf_missing; 937 938 /* Copy the rest of the bytes that are left in the 939 * buffer into the waiting sk_buf. */ 940 /* Make room for temp_bytes after tail. */ 941 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 942 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 943 944 odev->rx_buf_missing -= temp_bytes; 945 count -= temp_bytes; 946 buffer_offset += temp_bytes; 947 odev->rx_buf_size += temp_bytes; 948 if (!odev->rx_buf_missing) { 949 /* Packet is complete. Inject into stack. */ 950 /* We have IP packet here */ 951 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 952 skb_reset_mac_header(odev->skb_rx_buf); 953 954 /* Ship it off to the kernel */ 955 netif_rx(odev->skb_rx_buf); 956 /* No longer our buffer. */ 957 odev->skb_rx_buf = NULL; 958 959 /* update out statistics */ 960 odev->net->stats.rx_packets++; 961 962 odev->net->stats.rx_bytes += odev->rx_buf_size; 963 964 odev->rx_buf_size = 0; 965 odev->rx_buf_missing = sizeof(struct iphdr); 966 odev->rx_parse_state = WAIT_IP; 967 } 968 break; 969 970 case WAIT_SYNC: 971 D1(" W_S"); 972 count = 0; 973 break; 974 default: 975 D1(" "); 976 count--; 977 break; 978 } 979 } 980 981 /* Recovery mechanism for WAIT_SYNC state. */ 982 if (is_eop) { 983 if (odev->rx_parse_state == WAIT_SYNC) { 984 odev->rx_parse_state = WAIT_IP; 985 odev->rx_buf_size = 0; 986 odev->rx_buf_missing = sizeof(struct iphdr); 987 } 988 } 989 } 990 991 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 992 { 993 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 994 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 995 996 if (((rest == 5) || (rest == 6)) && 997 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 998 crc_check, 4)) { 999 urb->actual_length -= 4; 1000 } 1001 } 1002 1003 /* Moving data from usb to kernel (in interrupt state) */ 1004 static void read_bulk_callback(struct urb *urb) 1005 { 1006 struct hso_net *odev = urb->context; 1007 struct net_device *net; 1008 int result; 1009 int status = urb->status; 1010 1011 /* is al ok? (Filip: Who's Al ?) */ 1012 if (status) { 1013 handle_usb_error(status, __func__, odev->parent); 1014 return; 1015 } 1016 1017 /* Sanity check */ 1018 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1019 D1("BULK IN callback but driver is not active!"); 1020 return; 1021 } 1022 usb_mark_last_busy(urb->dev); 1023 1024 net = odev->net; 1025 1026 if (!netif_device_present(net)) { 1027 /* Somebody killed our network interface... */ 1028 return; 1029 } 1030 1031 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1032 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1033 1034 /* do we even have a packet? */ 1035 if (urb->actual_length) { 1036 /* Handle the IP stream, add header and push it onto network 1037 * stack if the packet is complete. */ 1038 spin_lock(&odev->net_lock); 1039 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1040 (urb->transfer_buffer_length > 1041 urb->actual_length) ? 1 : 0); 1042 spin_unlock(&odev->net_lock); 1043 } 1044 1045 /* We are done with this URB, resubmit it. Prep the USB to wait for 1046 * another frame. Reuse same as received. */ 1047 usb_fill_bulk_urb(urb, 1048 odev->parent->usb, 1049 usb_rcvbulkpipe(odev->parent->usb, 1050 odev->in_endp-> 1051 bEndpointAddress & 0x7F), 1052 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1053 read_bulk_callback, odev); 1054 1055 /* Give this to the USB subsystem so it can tell us when more data 1056 * arrives. */ 1057 result = usb_submit_urb(urb, GFP_ATOMIC); 1058 if (result) 1059 dev_warn(&odev->parent->interface->dev, 1060 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1061 result); 1062 } 1063 1064 /* Serial driver functions */ 1065 1066 static void hso_init_termios(struct ktermios *termios) 1067 { 1068 /* 1069 * The default requirements for this device are: 1070 */ 1071 termios->c_iflag &= 1072 ~(IGNBRK /* disable ignore break */ 1073 | BRKINT /* disable break causes interrupt */ 1074 | PARMRK /* disable mark parity errors */ 1075 | ISTRIP /* disable clear high bit of input characters */ 1076 | INLCR /* disable translate NL to CR */ 1077 | IGNCR /* disable ignore CR */ 1078 | ICRNL /* disable translate CR to NL */ 1079 | IXON); /* disable enable XON/XOFF flow control */ 1080 1081 /* disable postprocess output characters */ 1082 termios->c_oflag &= ~OPOST; 1083 1084 termios->c_lflag &= 1085 ~(ECHO /* disable echo input characters */ 1086 | ECHONL /* disable echo new line */ 1087 | ICANON /* disable erase, kill, werase, and rprnt 1088 special characters */ 1089 | ISIG /* disable interrupt, quit, and suspend special 1090 characters */ 1091 | IEXTEN); /* disable non-POSIX special characters */ 1092 1093 termios->c_cflag &= 1094 ~(CSIZE /* no size */ 1095 | PARENB /* disable parity bit */ 1096 | CBAUD /* clear current baud rate */ 1097 | CBAUDEX); /* clear current buad rate */ 1098 1099 termios->c_cflag |= CS8; /* character size 8 bits */ 1100 1101 /* baud rate 115200 */ 1102 tty_termios_encode_baud_rate(termios, 115200, 115200); 1103 } 1104 1105 static void _hso_serial_set_termios(struct tty_struct *tty, 1106 struct ktermios *old) 1107 { 1108 struct hso_serial *serial = tty->driver_data; 1109 1110 if (!serial) { 1111 printk(KERN_ERR "%s: no tty structures", __func__); 1112 return; 1113 } 1114 1115 D4("port %d", serial->minor); 1116 1117 /* 1118 * Fix up unsupported bits 1119 */ 1120 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1121 1122 tty->termios.c_cflag &= 1123 ~(CSIZE /* no size */ 1124 | PARENB /* disable parity bit */ 1125 | CBAUD /* clear current baud rate */ 1126 | CBAUDEX); /* clear current buad rate */ 1127 1128 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1129 1130 /* baud rate 115200 */ 1131 tty_encode_baud_rate(tty, 115200, 115200); 1132 } 1133 1134 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1135 { 1136 int result; 1137 /* We are done with this URB, resubmit it. Prep the USB to wait for 1138 * another frame */ 1139 usb_fill_bulk_urb(urb, serial->parent->usb, 1140 usb_rcvbulkpipe(serial->parent->usb, 1141 serial->in_endp-> 1142 bEndpointAddress & 0x7F), 1143 urb->transfer_buffer, serial->rx_data_length, 1144 hso_std_serial_read_bulk_callback, serial); 1145 /* Give this to the USB subsystem so it can tell us when more data 1146 * arrives. */ 1147 result = usb_submit_urb(urb, GFP_ATOMIC); 1148 if (result) { 1149 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1150 __func__, result); 1151 } 1152 } 1153 1154 1155 1156 1157 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1158 { 1159 int count; 1160 struct urb *curr_urb; 1161 1162 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1163 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1164 count = put_rxbuf_data(curr_urb, serial); 1165 if (count == -1) 1166 return; 1167 if (count == 0) { 1168 serial->curr_rx_urb_idx++; 1169 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1170 serial->curr_rx_urb_idx = 0; 1171 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1172 } 1173 } 1174 } 1175 1176 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1177 { 1178 int count = 0; 1179 struct urb *urb; 1180 1181 urb = serial->rx_urb[0]; 1182 if (serial->port.count > 0) { 1183 count = put_rxbuf_data(urb, serial); 1184 if (count == -1) 1185 return; 1186 } 1187 /* Re issue a read as long as we receive data. */ 1188 1189 if (count == 0 && ((urb->actual_length != 0) || 1190 (serial->rx_state == RX_PENDING))) { 1191 serial->rx_state = RX_SENT; 1192 hso_mux_serial_read(serial); 1193 } else 1194 serial->rx_state = RX_IDLE; 1195 } 1196 1197 1198 /* read callback for Diag and CS port */ 1199 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1200 { 1201 struct hso_serial *serial = urb->context; 1202 int status = urb->status; 1203 1204 /* sanity check */ 1205 if (!serial) { 1206 D1("serial == NULL"); 1207 return; 1208 } else if (status) { 1209 handle_usb_error(status, __func__, serial->parent); 1210 return; 1211 } 1212 1213 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1214 D1("Actual length = %d\n", urb->actual_length); 1215 DUMP1(urb->transfer_buffer, urb->actual_length); 1216 1217 /* Anyone listening? */ 1218 if (serial->port.count == 0) 1219 return; 1220 1221 if (status == 0) { 1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1223 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1224 /* Valid data, handle RX data */ 1225 spin_lock(&serial->serial_lock); 1226 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1227 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1228 spin_unlock(&serial->serial_lock); 1229 } else if (status == -ENOENT || status == -ECONNRESET) { 1230 /* Unlinked - check for throttled port. */ 1231 D2("Port %d, successfully unlinked urb", serial->minor); 1232 spin_lock(&serial->serial_lock); 1233 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1234 hso_resubmit_rx_bulk_urb(serial, urb); 1235 spin_unlock(&serial->serial_lock); 1236 } else { 1237 D2("Port %d, status = %d for read urb", serial->minor, status); 1238 return; 1239 } 1240 } 1241 1242 /* 1243 * This needs to be a tasklet otherwise we will 1244 * end up recursively calling this function. 1245 */ 1246 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1247 { 1248 unsigned long flags; 1249 1250 spin_lock_irqsave(&serial->serial_lock, flags); 1251 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1252 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1253 else 1254 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1255 spin_unlock_irqrestore(&serial->serial_lock, flags); 1256 } 1257 1258 static void hso_unthrottle(struct tty_struct *tty) 1259 { 1260 struct hso_serial *serial = tty->driver_data; 1261 1262 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1263 } 1264 1265 static void hso_unthrottle_workfunc(struct work_struct *work) 1266 { 1267 struct hso_serial *serial = 1268 container_of(work, struct hso_serial, 1269 retry_unthrottle_workqueue); 1270 hso_unthrottle_tasklet(serial); 1271 } 1272 1273 /* open the requested serial port */ 1274 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1275 { 1276 struct hso_serial *serial = get_serial_by_index(tty->index); 1277 int result; 1278 1279 /* sanity check */ 1280 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1281 WARN_ON(1); 1282 tty->driver_data = NULL; 1283 D1("Failed to open port"); 1284 return -ENODEV; 1285 } 1286 1287 mutex_lock(&serial->parent->mutex); 1288 result = usb_autopm_get_interface(serial->parent->interface); 1289 if (result < 0) 1290 goto err_out; 1291 1292 D1("Opening %d", serial->minor); 1293 kref_get(&serial->parent->ref); 1294 1295 /* setup */ 1296 tty->driver_data = serial; 1297 tty_port_tty_set(&serial->port, tty); 1298 1299 /* check for port already opened, if not set the termios */ 1300 serial->port.count++; 1301 if (serial->port.count == 1) { 1302 serial->rx_state = RX_IDLE; 1303 /* Force default termio settings */ 1304 _hso_serial_set_termios(tty, NULL); 1305 tasklet_init(&serial->unthrottle_tasklet, 1306 (void (*)(unsigned long))hso_unthrottle_tasklet, 1307 (unsigned long)serial); 1308 INIT_WORK(&serial->retry_unthrottle_workqueue, 1309 hso_unthrottle_workfunc); 1310 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1311 if (result) { 1312 hso_stop_serial_device(serial->parent); 1313 serial->port.count--; 1314 kref_put(&serial->parent->ref, hso_serial_ref_free); 1315 } 1316 } else { 1317 D1("Port was already open"); 1318 } 1319 1320 usb_autopm_put_interface(serial->parent->interface); 1321 1322 /* done */ 1323 if (result) 1324 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1325 err_out: 1326 mutex_unlock(&serial->parent->mutex); 1327 return result; 1328 } 1329 1330 /* close the requested serial port */ 1331 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1332 { 1333 struct hso_serial *serial = tty->driver_data; 1334 u8 usb_gone; 1335 1336 D1("Closing serial port"); 1337 1338 /* Open failed, no close cleanup required */ 1339 if (serial == NULL) 1340 return; 1341 1342 mutex_lock(&serial->parent->mutex); 1343 usb_gone = serial->parent->usb_gone; 1344 1345 if (!usb_gone) 1346 usb_autopm_get_interface(serial->parent->interface); 1347 1348 /* reset the rts and dtr */ 1349 /* do the actual close */ 1350 serial->port.count--; 1351 1352 if (serial->port.count <= 0) { 1353 serial->port.count = 0; 1354 tty_port_tty_set(&serial->port, NULL); 1355 if (!usb_gone) 1356 hso_stop_serial_device(serial->parent); 1357 tasklet_kill(&serial->unthrottle_tasklet); 1358 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1359 } 1360 1361 if (!usb_gone) 1362 usb_autopm_put_interface(serial->parent->interface); 1363 1364 mutex_unlock(&serial->parent->mutex); 1365 1366 kref_put(&serial->parent->ref, hso_serial_ref_free); 1367 } 1368 1369 /* close the requested serial port */ 1370 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1371 int count) 1372 { 1373 struct hso_serial *serial = tty->driver_data; 1374 int space, tx_bytes; 1375 unsigned long flags; 1376 1377 /* sanity check */ 1378 if (serial == NULL) { 1379 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1380 return -ENODEV; 1381 } 1382 1383 spin_lock_irqsave(&serial->serial_lock, flags); 1384 1385 space = serial->tx_data_length - serial->tx_buffer_count; 1386 tx_bytes = (count < space) ? count : space; 1387 1388 if (!tx_bytes) 1389 goto out; 1390 1391 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1392 serial->tx_buffer_count += tx_bytes; 1393 1394 out: 1395 spin_unlock_irqrestore(&serial->serial_lock, flags); 1396 1397 hso_kick_transmit(serial); 1398 /* done */ 1399 return tx_bytes; 1400 } 1401 1402 /* how much room is there for writing */ 1403 static int hso_serial_write_room(struct tty_struct *tty) 1404 { 1405 struct hso_serial *serial = tty->driver_data; 1406 int room; 1407 unsigned long flags; 1408 1409 spin_lock_irqsave(&serial->serial_lock, flags); 1410 room = serial->tx_data_length - serial->tx_buffer_count; 1411 spin_unlock_irqrestore(&serial->serial_lock, flags); 1412 1413 /* return free room */ 1414 return room; 1415 } 1416 1417 /* setup the term */ 1418 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1419 { 1420 struct hso_serial *serial = tty->driver_data; 1421 unsigned long flags; 1422 1423 if (old) 1424 D5("Termios called with: cflags new[%d] - old[%d]", 1425 tty->termios.c_cflag, old->c_cflag); 1426 1427 /* the actual setup */ 1428 spin_lock_irqsave(&serial->serial_lock, flags); 1429 if (serial->port.count) 1430 _hso_serial_set_termios(tty, old); 1431 else 1432 tty->termios = *old; 1433 spin_unlock_irqrestore(&serial->serial_lock, flags); 1434 1435 /* done */ 1436 } 1437 1438 /* how many characters in the buffer */ 1439 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1440 { 1441 struct hso_serial *serial = tty->driver_data; 1442 int chars; 1443 unsigned long flags; 1444 1445 /* sanity check */ 1446 if (serial == NULL) 1447 return 0; 1448 1449 spin_lock_irqsave(&serial->serial_lock, flags); 1450 chars = serial->tx_buffer_count; 1451 spin_unlock_irqrestore(&serial->serial_lock, flags); 1452 1453 return chars; 1454 } 1455 static int tiocmget_submit_urb(struct hso_serial *serial, 1456 struct hso_tiocmget *tiocmget, 1457 struct usb_device *usb) 1458 { 1459 int result; 1460 1461 if (serial->parent->usb_gone) 1462 return -ENODEV; 1463 usb_fill_int_urb(tiocmget->urb, usb, 1464 usb_rcvintpipe(usb, 1465 tiocmget->endp-> 1466 bEndpointAddress & 0x7F), 1467 &tiocmget->serial_state_notification, 1468 sizeof(struct hso_serial_state_notification), 1469 tiocmget_intr_callback, serial, 1470 tiocmget->endp->bInterval); 1471 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1472 if (result) { 1473 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1474 result); 1475 } 1476 return result; 1477 1478 } 1479 1480 static void tiocmget_intr_callback(struct urb *urb) 1481 { 1482 struct hso_serial *serial = urb->context; 1483 struct hso_tiocmget *tiocmget; 1484 int status = urb->status; 1485 u16 UART_state_bitmap, prev_UART_state_bitmap; 1486 struct uart_icount *icount; 1487 struct hso_serial_state_notification *serial_state_notification; 1488 struct usb_device *usb; 1489 int if_num; 1490 1491 /* Sanity checks */ 1492 if (!serial) 1493 return; 1494 if (status) { 1495 handle_usb_error(status, __func__, serial->parent); 1496 return; 1497 } 1498 1499 /* tiocmget is only supported on HSO_PORT_MODEM */ 1500 tiocmget = serial->tiocmget; 1501 if (!tiocmget) 1502 return; 1503 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1504 1505 usb = serial->parent->usb; 1506 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1507 1508 /* wIndex should be the USB interface number of the port to which the 1509 * notification applies, which should always be the Modem port. 1510 */ 1511 serial_state_notification = &tiocmget->serial_state_notification; 1512 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1513 serial_state_notification->bNotification != B_NOTIFICATION || 1514 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1515 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1516 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1517 dev_warn(&usb->dev, 1518 "hso received invalid serial state notification\n"); 1519 DUMP(serial_state_notification, 1520 sizeof(struct hso_serial_state_notification)); 1521 } else { 1522 1523 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1524 UART_state_bitmap); 1525 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1526 icount = &tiocmget->icount; 1527 spin_lock(&serial->serial_lock); 1528 if ((UART_state_bitmap & B_OVERRUN) != 1529 (prev_UART_state_bitmap & B_OVERRUN)) 1530 icount->parity++; 1531 if ((UART_state_bitmap & B_PARITY) != 1532 (prev_UART_state_bitmap & B_PARITY)) 1533 icount->parity++; 1534 if ((UART_state_bitmap & B_FRAMING) != 1535 (prev_UART_state_bitmap & B_FRAMING)) 1536 icount->frame++; 1537 if ((UART_state_bitmap & B_RING_SIGNAL) && 1538 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1539 icount->rng++; 1540 if ((UART_state_bitmap & B_BREAK) != 1541 (prev_UART_state_bitmap & B_BREAK)) 1542 icount->brk++; 1543 if ((UART_state_bitmap & B_TX_CARRIER) != 1544 (prev_UART_state_bitmap & B_TX_CARRIER)) 1545 icount->dsr++; 1546 if ((UART_state_bitmap & B_RX_CARRIER) != 1547 (prev_UART_state_bitmap & B_RX_CARRIER)) 1548 icount->dcd++; 1549 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1550 spin_unlock(&serial->serial_lock); 1551 tiocmget->intr_completed = 1; 1552 wake_up_interruptible(&tiocmget->waitq); 1553 } 1554 memset(serial_state_notification, 0, 1555 sizeof(struct hso_serial_state_notification)); 1556 tiocmget_submit_urb(serial, 1557 tiocmget, 1558 serial->parent->usb); 1559 } 1560 1561 /* 1562 * next few functions largely stolen from drivers/serial/serial_core.c 1563 */ 1564 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1565 * - mask passed in arg for lines of interest 1566 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1567 * Caller should use TIOCGICOUNT to see which one it was 1568 */ 1569 static int 1570 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1571 { 1572 DECLARE_WAITQUEUE(wait, current); 1573 struct uart_icount cprev, cnow; 1574 struct hso_tiocmget *tiocmget; 1575 int ret; 1576 1577 tiocmget = serial->tiocmget; 1578 if (!tiocmget) 1579 return -ENOENT; 1580 /* 1581 * note the counters on entry 1582 */ 1583 spin_lock_irq(&serial->serial_lock); 1584 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1585 spin_unlock_irq(&serial->serial_lock); 1586 add_wait_queue(&tiocmget->waitq, &wait); 1587 for (;;) { 1588 spin_lock_irq(&serial->serial_lock); 1589 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1590 spin_unlock_irq(&serial->serial_lock); 1591 set_current_state(TASK_INTERRUPTIBLE); 1592 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1593 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1594 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1595 ret = 0; 1596 break; 1597 } 1598 schedule(); 1599 /* see if a signal did it */ 1600 if (signal_pending(current)) { 1601 ret = -ERESTARTSYS; 1602 break; 1603 } 1604 cprev = cnow; 1605 } 1606 current->state = TASK_RUNNING; 1607 remove_wait_queue(&tiocmget->waitq, &wait); 1608 1609 return ret; 1610 } 1611 1612 /* 1613 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1614 * Return: write counters to the user passed counter struct 1615 * NB: both 1->0 and 0->1 transitions are counted except for 1616 * RI where only 0->1 is counted. 1617 */ 1618 static int hso_get_count(struct tty_struct *tty, 1619 struct serial_icounter_struct *icount) 1620 { 1621 struct uart_icount cnow; 1622 struct hso_serial *serial = tty->driver_data; 1623 struct hso_tiocmget *tiocmget = serial->tiocmget; 1624 1625 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1626 1627 if (!tiocmget) 1628 return -ENOENT; 1629 spin_lock_irq(&serial->serial_lock); 1630 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1631 spin_unlock_irq(&serial->serial_lock); 1632 1633 icount->cts = cnow.cts; 1634 icount->dsr = cnow.dsr; 1635 icount->rng = cnow.rng; 1636 icount->dcd = cnow.dcd; 1637 icount->rx = cnow.rx; 1638 icount->tx = cnow.tx; 1639 icount->frame = cnow.frame; 1640 icount->overrun = cnow.overrun; 1641 icount->parity = cnow.parity; 1642 icount->brk = cnow.brk; 1643 icount->buf_overrun = cnow.buf_overrun; 1644 1645 return 0; 1646 } 1647 1648 1649 static int hso_serial_tiocmget(struct tty_struct *tty) 1650 { 1651 int retval; 1652 struct hso_serial *serial = tty->driver_data; 1653 struct hso_tiocmget *tiocmget; 1654 u16 UART_state_bitmap; 1655 1656 /* sanity check */ 1657 if (!serial) { 1658 D1("no tty structures"); 1659 return -EINVAL; 1660 } 1661 spin_lock_irq(&serial->serial_lock); 1662 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1663 ((serial->dtr_state) ? TIOCM_DTR : 0); 1664 tiocmget = serial->tiocmget; 1665 if (tiocmget) { 1666 1667 UART_state_bitmap = le16_to_cpu( 1668 tiocmget->prev_UART_state_bitmap); 1669 if (UART_state_bitmap & B_RING_SIGNAL) 1670 retval |= TIOCM_RNG; 1671 if (UART_state_bitmap & B_RX_CARRIER) 1672 retval |= TIOCM_CD; 1673 if (UART_state_bitmap & B_TX_CARRIER) 1674 retval |= TIOCM_DSR; 1675 } 1676 spin_unlock_irq(&serial->serial_lock); 1677 return retval; 1678 } 1679 1680 static int hso_serial_tiocmset(struct tty_struct *tty, 1681 unsigned int set, unsigned int clear) 1682 { 1683 int val = 0; 1684 unsigned long flags; 1685 int if_num; 1686 struct hso_serial *serial = tty->driver_data; 1687 1688 /* sanity check */ 1689 if (!serial) { 1690 D1("no tty structures"); 1691 return -EINVAL; 1692 } 1693 1694 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1695 return -EINVAL; 1696 1697 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1698 1699 spin_lock_irqsave(&serial->serial_lock, flags); 1700 if (set & TIOCM_RTS) 1701 serial->rts_state = 1; 1702 if (set & TIOCM_DTR) 1703 serial->dtr_state = 1; 1704 1705 if (clear & TIOCM_RTS) 1706 serial->rts_state = 0; 1707 if (clear & TIOCM_DTR) 1708 serial->dtr_state = 0; 1709 1710 if (serial->dtr_state) 1711 val |= 0x01; 1712 if (serial->rts_state) 1713 val |= 0x02; 1714 1715 spin_unlock_irqrestore(&serial->serial_lock, flags); 1716 1717 return usb_control_msg(serial->parent->usb, 1718 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1719 0x21, val, if_num, NULL, 0, 1720 USB_CTRL_SET_TIMEOUT); 1721 } 1722 1723 static int hso_serial_ioctl(struct tty_struct *tty, 1724 unsigned int cmd, unsigned long arg) 1725 { 1726 struct hso_serial *serial = tty->driver_data; 1727 int ret = 0; 1728 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1729 1730 if (!serial) 1731 return -ENODEV; 1732 switch (cmd) { 1733 case TIOCMIWAIT: 1734 ret = hso_wait_modem_status(serial, arg); 1735 break; 1736 default: 1737 ret = -ENOIOCTLCMD; 1738 break; 1739 } 1740 return ret; 1741 } 1742 1743 1744 /* starts a transmit */ 1745 static void hso_kick_transmit(struct hso_serial *serial) 1746 { 1747 u8 *temp; 1748 unsigned long flags; 1749 int res; 1750 1751 spin_lock_irqsave(&serial->serial_lock, flags); 1752 if (!serial->tx_buffer_count) 1753 goto out; 1754 1755 if (serial->tx_urb_used) 1756 goto out; 1757 1758 /* Wakeup USB interface if necessary */ 1759 if (hso_get_activity(serial->parent) == -EAGAIN) 1760 goto out; 1761 1762 /* Switch pointers around to avoid memcpy */ 1763 temp = serial->tx_buffer; 1764 serial->tx_buffer = serial->tx_data; 1765 serial->tx_data = temp; 1766 serial->tx_data_count = serial->tx_buffer_count; 1767 serial->tx_buffer_count = 0; 1768 1769 /* If temp is set, it means we switched buffers */ 1770 if (temp && serial->write_data) { 1771 res = serial->write_data(serial); 1772 if (res >= 0) 1773 serial->tx_urb_used = 1; 1774 } 1775 out: 1776 spin_unlock_irqrestore(&serial->serial_lock, flags); 1777 } 1778 1779 /* make a request (for reading and writing data to muxed serial port) */ 1780 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1781 struct urb *ctrl_urb, 1782 struct usb_ctrlrequest *ctrl_req, 1783 u8 *ctrl_urb_data, u32 size) 1784 { 1785 int result; 1786 int pipe; 1787 1788 /* Sanity check */ 1789 if (!serial || !ctrl_urb || !ctrl_req) { 1790 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1791 return -EINVAL; 1792 } 1793 1794 /* initialize */ 1795 ctrl_req->wValue = 0; 1796 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1797 ctrl_req->wLength = cpu_to_le16(size); 1798 1799 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1800 /* Reading command */ 1801 ctrl_req->bRequestType = USB_DIR_IN | 1802 USB_TYPE_OPTION_VENDOR | 1803 USB_RECIP_INTERFACE; 1804 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1805 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1806 } else { 1807 /* Writing command */ 1808 ctrl_req->bRequestType = USB_DIR_OUT | 1809 USB_TYPE_OPTION_VENDOR | 1810 USB_RECIP_INTERFACE; 1811 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1812 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1813 } 1814 /* syslog */ 1815 D2("%s command (%02x) len: %d, port: %d", 1816 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1817 ctrl_req->bRequestType, ctrl_req->wLength, port); 1818 1819 /* Load ctrl urb */ 1820 ctrl_urb->transfer_flags = 0; 1821 usb_fill_control_urb(ctrl_urb, 1822 serial->parent->usb, 1823 pipe, 1824 (u8 *) ctrl_req, 1825 ctrl_urb_data, size, ctrl_callback, serial); 1826 /* Send it on merry way */ 1827 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1828 if (result) { 1829 dev_err(&ctrl_urb->dev->dev, 1830 "%s failed submit ctrl_urb %d type %d\n", __func__, 1831 result, type); 1832 return result; 1833 } 1834 1835 /* done */ 1836 return size; 1837 } 1838 1839 /* called by intr_callback when read occurs */ 1840 static int hso_mux_serial_read(struct hso_serial *serial) 1841 { 1842 if (!serial) 1843 return -EINVAL; 1844 1845 /* clean data */ 1846 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1847 /* make the request */ 1848 1849 if (serial->num_rx_urbs != 1) { 1850 dev_err(&serial->parent->interface->dev, 1851 "ERROR: mux'd reads with multiple buffers " 1852 "not possible\n"); 1853 return 0; 1854 } 1855 return mux_device_request(serial, 1856 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1857 serial->parent->port_spec & HSO_PORT_MASK, 1858 serial->rx_urb[0], 1859 &serial->ctrl_req_rx, 1860 serial->rx_data[0], serial->rx_data_length); 1861 } 1862 1863 /* used for muxed serial port callback (muxed serial read) */ 1864 static void intr_callback(struct urb *urb) 1865 { 1866 struct hso_shared_int *shared_int = urb->context; 1867 struct hso_serial *serial; 1868 unsigned char *port_req; 1869 int status = urb->status; 1870 int i; 1871 1872 usb_mark_last_busy(urb->dev); 1873 1874 /* sanity check */ 1875 if (!shared_int) 1876 return; 1877 1878 /* status check */ 1879 if (status) { 1880 handle_usb_error(status, __func__, NULL); 1881 return; 1882 } 1883 D4("\n--- Got intr callback 0x%02X ---", status); 1884 1885 /* what request? */ 1886 port_req = urb->transfer_buffer; 1887 D4(" port_req = 0x%.2X\n", *port_req); 1888 /* loop over all muxed ports to find the one sending this */ 1889 for (i = 0; i < 8; i++) { 1890 /* max 8 channels on MUX */ 1891 if (*port_req & (1 << i)) { 1892 serial = get_serial_by_shared_int_and_type(shared_int, 1893 (1 << i)); 1894 if (serial != NULL) { 1895 D1("Pending read interrupt on port %d\n", i); 1896 spin_lock(&serial->serial_lock); 1897 if (serial->rx_state == RX_IDLE && 1898 serial->port.count > 0) { 1899 /* Setup and send a ctrl req read on 1900 * port i */ 1901 if (!serial->rx_urb_filled[0]) { 1902 serial->rx_state = RX_SENT; 1903 hso_mux_serial_read(serial); 1904 } else 1905 serial->rx_state = RX_PENDING; 1906 } else { 1907 D1("Already a read pending on " 1908 "port %d or port not open\n", i); 1909 } 1910 spin_unlock(&serial->serial_lock); 1911 } 1912 } 1913 } 1914 /* Resubmit interrupt urb */ 1915 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1916 } 1917 1918 /* called for writing to muxed serial port */ 1919 static int hso_mux_serial_write_data(struct hso_serial *serial) 1920 { 1921 if (NULL == serial) 1922 return -EINVAL; 1923 1924 return mux_device_request(serial, 1925 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1926 serial->parent->port_spec & HSO_PORT_MASK, 1927 serial->tx_urb, 1928 &serial->ctrl_req_tx, 1929 serial->tx_data, serial->tx_data_count); 1930 } 1931 1932 /* write callback for Diag and CS port */ 1933 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1934 { 1935 struct hso_serial *serial = urb->context; 1936 int status = urb->status; 1937 1938 /* sanity check */ 1939 if (!serial) { 1940 D1("serial == NULL"); 1941 return; 1942 } 1943 1944 spin_lock(&serial->serial_lock); 1945 serial->tx_urb_used = 0; 1946 spin_unlock(&serial->serial_lock); 1947 if (status) { 1948 handle_usb_error(status, __func__, serial->parent); 1949 return; 1950 } 1951 hso_put_activity(serial->parent); 1952 tty_port_tty_wakeup(&serial->port); 1953 hso_kick_transmit(serial); 1954 1955 D1(" "); 1956 } 1957 1958 /* called for writing diag or CS serial port */ 1959 static int hso_std_serial_write_data(struct hso_serial *serial) 1960 { 1961 int count = serial->tx_data_count; 1962 int result; 1963 1964 usb_fill_bulk_urb(serial->tx_urb, 1965 serial->parent->usb, 1966 usb_sndbulkpipe(serial->parent->usb, 1967 serial->out_endp-> 1968 bEndpointAddress & 0x7F), 1969 serial->tx_data, serial->tx_data_count, 1970 hso_std_serial_write_bulk_callback, serial); 1971 1972 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1973 if (result) { 1974 dev_warn(&serial->parent->usb->dev, 1975 "Failed to submit urb - res %d\n", result); 1976 return result; 1977 } 1978 1979 return count; 1980 } 1981 1982 /* callback after read or write on muxed serial port */ 1983 static void ctrl_callback(struct urb *urb) 1984 { 1985 struct hso_serial *serial = urb->context; 1986 struct usb_ctrlrequest *req; 1987 int status = urb->status; 1988 1989 /* sanity check */ 1990 if (!serial) 1991 return; 1992 1993 spin_lock(&serial->serial_lock); 1994 serial->tx_urb_used = 0; 1995 spin_unlock(&serial->serial_lock); 1996 if (status) { 1997 handle_usb_error(status, __func__, serial->parent); 1998 return; 1999 } 2000 2001 /* what request? */ 2002 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2003 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2004 D4("Actual length of urb = %d\n", urb->actual_length); 2005 DUMP1(urb->transfer_buffer, urb->actual_length); 2006 2007 if (req->bRequestType == 2008 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2009 /* response to a read command */ 2010 serial->rx_urb_filled[0] = 1; 2011 spin_lock(&serial->serial_lock); 2012 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2013 spin_unlock(&serial->serial_lock); 2014 } else { 2015 hso_put_activity(serial->parent); 2016 tty_port_tty_wakeup(&serial->port); 2017 /* response to a write command */ 2018 hso_kick_transmit(serial); 2019 } 2020 } 2021 2022 /* handle RX data for serial port */ 2023 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2024 { 2025 struct tty_struct *tty; 2026 int write_length_remaining = 0; 2027 int curr_write_len; 2028 2029 /* Sanity check */ 2030 if (urb == NULL || serial == NULL) { 2031 D1("serial = NULL"); 2032 return -2; 2033 } 2034 2035 tty = tty_port_tty_get(&serial->port); 2036 2037 /* Push data to tty */ 2038 write_length_remaining = urb->actual_length - 2039 serial->curr_rx_urb_offset; 2040 D1("data to push to tty"); 2041 while (write_length_remaining) { 2042 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2043 tty_kref_put(tty); 2044 return -1; 2045 } 2046 curr_write_len = tty_insert_flip_string(&serial->port, 2047 urb->transfer_buffer + serial->curr_rx_urb_offset, 2048 write_length_remaining); 2049 serial->curr_rx_urb_offset += curr_write_len; 2050 write_length_remaining -= curr_write_len; 2051 tty_flip_buffer_push(&serial->port); 2052 } 2053 tty_kref_put(tty); 2054 2055 if (write_length_remaining == 0) { 2056 serial->curr_rx_urb_offset = 0; 2057 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2058 } 2059 return write_length_remaining; 2060 } 2061 2062 2063 /* Base driver functions */ 2064 2065 static void hso_log_port(struct hso_device *hso_dev) 2066 { 2067 char *port_type; 2068 char port_dev[20]; 2069 2070 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2071 case HSO_PORT_CONTROL: 2072 port_type = "Control"; 2073 break; 2074 case HSO_PORT_APP: 2075 port_type = "Application"; 2076 break; 2077 case HSO_PORT_GPS: 2078 port_type = "GPS"; 2079 break; 2080 case HSO_PORT_GPS_CONTROL: 2081 port_type = "GPS control"; 2082 break; 2083 case HSO_PORT_APP2: 2084 port_type = "Application2"; 2085 break; 2086 case HSO_PORT_PCSC: 2087 port_type = "PCSC"; 2088 break; 2089 case HSO_PORT_DIAG: 2090 port_type = "Diagnostic"; 2091 break; 2092 case HSO_PORT_DIAG2: 2093 port_type = "Diagnostic2"; 2094 break; 2095 case HSO_PORT_MODEM: 2096 port_type = "Modem"; 2097 break; 2098 case HSO_PORT_NETWORK: 2099 port_type = "Network"; 2100 break; 2101 default: 2102 port_type = "Unknown"; 2103 break; 2104 } 2105 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2106 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2107 } else 2108 sprintf(port_dev, "/dev/%s%d", tty_filename, 2109 dev2ser(hso_dev)->minor); 2110 2111 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2112 port_type, port_dev); 2113 } 2114 2115 static int hso_start_net_device(struct hso_device *hso_dev) 2116 { 2117 int i, result = 0; 2118 struct hso_net *hso_net = dev2net(hso_dev); 2119 2120 if (!hso_net) 2121 return -ENODEV; 2122 2123 /* send URBs for all read buffers */ 2124 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2125 2126 /* Prep a receive URB */ 2127 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2128 hso_dev->usb, 2129 usb_rcvbulkpipe(hso_dev->usb, 2130 hso_net->in_endp-> 2131 bEndpointAddress & 0x7F), 2132 hso_net->mux_bulk_rx_buf_pool[i], 2133 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2134 hso_net); 2135 2136 /* Put it out there so the device can send us stuff */ 2137 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2138 GFP_NOIO); 2139 if (result) 2140 dev_warn(&hso_dev->usb->dev, 2141 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2142 i, result); 2143 } 2144 2145 return result; 2146 } 2147 2148 static int hso_stop_net_device(struct hso_device *hso_dev) 2149 { 2150 int i; 2151 struct hso_net *hso_net = dev2net(hso_dev); 2152 2153 if (!hso_net) 2154 return -ENODEV; 2155 2156 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2157 if (hso_net->mux_bulk_rx_urb_pool[i]) 2158 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2159 2160 } 2161 if (hso_net->mux_bulk_tx_urb) 2162 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2163 2164 return 0; 2165 } 2166 2167 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2168 { 2169 int i, result = 0; 2170 struct hso_serial *serial = dev2ser(hso_dev); 2171 2172 if (!serial) 2173 return -ENODEV; 2174 2175 /* If it is not the MUX port fill in and submit a bulk urb (already 2176 * allocated in hso_serial_start) */ 2177 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2178 for (i = 0; i < serial->num_rx_urbs; i++) { 2179 usb_fill_bulk_urb(serial->rx_urb[i], 2180 serial->parent->usb, 2181 usb_rcvbulkpipe(serial->parent->usb, 2182 serial->in_endp-> 2183 bEndpointAddress & 2184 0x7F), 2185 serial->rx_data[i], 2186 serial->rx_data_length, 2187 hso_std_serial_read_bulk_callback, 2188 serial); 2189 result = usb_submit_urb(serial->rx_urb[i], flags); 2190 if (result) { 2191 dev_warn(&serial->parent->usb->dev, 2192 "Failed to submit urb - res %d\n", 2193 result); 2194 break; 2195 } 2196 } 2197 } else { 2198 mutex_lock(&serial->shared_int->shared_int_lock); 2199 if (!serial->shared_int->use_count) { 2200 result = 2201 hso_mux_submit_intr_urb(serial->shared_int, 2202 hso_dev->usb, flags); 2203 } 2204 serial->shared_int->use_count++; 2205 mutex_unlock(&serial->shared_int->shared_int_lock); 2206 } 2207 if (serial->tiocmget) 2208 tiocmget_submit_urb(serial, 2209 serial->tiocmget, 2210 serial->parent->usb); 2211 return result; 2212 } 2213 2214 static int hso_stop_serial_device(struct hso_device *hso_dev) 2215 { 2216 int i; 2217 struct hso_serial *serial = dev2ser(hso_dev); 2218 struct hso_tiocmget *tiocmget; 2219 2220 if (!serial) 2221 return -ENODEV; 2222 2223 for (i = 0; i < serial->num_rx_urbs; i++) { 2224 if (serial->rx_urb[i]) { 2225 usb_kill_urb(serial->rx_urb[i]); 2226 serial->rx_urb_filled[i] = 0; 2227 } 2228 } 2229 serial->curr_rx_urb_idx = 0; 2230 serial->curr_rx_urb_offset = 0; 2231 2232 if (serial->tx_urb) 2233 usb_kill_urb(serial->tx_urb); 2234 2235 if (serial->shared_int) { 2236 mutex_lock(&serial->shared_int->shared_int_lock); 2237 if (serial->shared_int->use_count && 2238 (--serial->shared_int->use_count == 0)) { 2239 struct urb *urb; 2240 2241 urb = serial->shared_int->shared_intr_urb; 2242 if (urb) 2243 usb_kill_urb(urb); 2244 } 2245 mutex_unlock(&serial->shared_int->shared_int_lock); 2246 } 2247 tiocmget = serial->tiocmget; 2248 if (tiocmget) { 2249 wake_up_interruptible(&tiocmget->waitq); 2250 usb_kill_urb(tiocmget->urb); 2251 } 2252 2253 return 0; 2254 } 2255 2256 static void hso_serial_common_free(struct hso_serial *serial) 2257 { 2258 int i; 2259 2260 if (serial->parent->dev) 2261 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2262 2263 tty_unregister_device(tty_drv, serial->minor); 2264 2265 for (i = 0; i < serial->num_rx_urbs; i++) { 2266 /* unlink and free RX URB */ 2267 usb_free_urb(serial->rx_urb[i]); 2268 /* free the RX buffer */ 2269 kfree(serial->rx_data[i]); 2270 } 2271 2272 /* unlink and free TX URB */ 2273 usb_free_urb(serial->tx_urb); 2274 kfree(serial->tx_data); 2275 tty_port_destroy(&serial->port); 2276 } 2277 2278 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2279 int rx_size, int tx_size) 2280 { 2281 struct device *dev; 2282 int minor; 2283 int i; 2284 2285 tty_port_init(&serial->port); 2286 2287 minor = get_free_serial_index(); 2288 if (minor < 0) 2289 goto exit; 2290 2291 /* register our minor number */ 2292 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv, 2293 minor, &serial->parent->interface->dev); 2294 dev = serial->parent->dev; 2295 dev_set_drvdata(dev, serial->parent); 2296 i = device_create_file(dev, &dev_attr_hsotype); 2297 2298 /* fill in specific data for later use */ 2299 serial->minor = minor; 2300 serial->magic = HSO_SERIAL_MAGIC; 2301 spin_lock_init(&serial->serial_lock); 2302 serial->num_rx_urbs = num_urbs; 2303 2304 /* RX, allocate urb and initialize */ 2305 2306 /* prepare our RX buffer */ 2307 serial->rx_data_length = rx_size; 2308 for (i = 0; i < serial->num_rx_urbs; i++) { 2309 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2310 if (!serial->rx_urb[i]) { 2311 dev_err(dev, "Could not allocate urb?\n"); 2312 goto exit; 2313 } 2314 serial->rx_urb[i]->transfer_buffer = NULL; 2315 serial->rx_urb[i]->transfer_buffer_length = 0; 2316 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2317 GFP_KERNEL); 2318 if (!serial->rx_data[i]) 2319 goto exit; 2320 } 2321 2322 /* TX, allocate urb and initialize */ 2323 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2324 if (!serial->tx_urb) { 2325 dev_err(dev, "Could not allocate urb?\n"); 2326 goto exit; 2327 } 2328 serial->tx_urb->transfer_buffer = NULL; 2329 serial->tx_urb->transfer_buffer_length = 0; 2330 /* prepare our TX buffer */ 2331 serial->tx_data_count = 0; 2332 serial->tx_buffer_count = 0; 2333 serial->tx_data_length = tx_size; 2334 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2335 if (!serial->tx_data) 2336 goto exit; 2337 2338 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2339 if (!serial->tx_buffer) 2340 goto exit; 2341 2342 return 0; 2343 exit: 2344 hso_serial_common_free(serial); 2345 return -1; 2346 } 2347 2348 /* Creates a general hso device */ 2349 static struct hso_device *hso_create_device(struct usb_interface *intf, 2350 int port_spec) 2351 { 2352 struct hso_device *hso_dev; 2353 2354 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2355 if (!hso_dev) 2356 return NULL; 2357 2358 hso_dev->port_spec = port_spec; 2359 hso_dev->usb = interface_to_usbdev(intf); 2360 hso_dev->interface = intf; 2361 kref_init(&hso_dev->ref); 2362 mutex_init(&hso_dev->mutex); 2363 2364 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2365 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2366 INIT_WORK(&hso_dev->reset_device, reset_device); 2367 2368 return hso_dev; 2369 } 2370 2371 /* Removes a network device in the network device table */ 2372 static int remove_net_device(struct hso_device *hso_dev) 2373 { 2374 int i; 2375 2376 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2377 if (network_table[i] == hso_dev) { 2378 network_table[i] = NULL; 2379 break; 2380 } 2381 } 2382 if (i == HSO_MAX_NET_DEVICES) 2383 return -1; 2384 return 0; 2385 } 2386 2387 /* Frees our network device */ 2388 static void hso_free_net_device(struct hso_device *hso_dev) 2389 { 2390 int i; 2391 struct hso_net *hso_net = dev2net(hso_dev); 2392 2393 if (!hso_net) 2394 return; 2395 2396 remove_net_device(hso_net->parent); 2397 2398 if (hso_net->net) 2399 unregister_netdev(hso_net->net); 2400 2401 /* start freeing */ 2402 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2403 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2404 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2405 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2406 } 2407 usb_free_urb(hso_net->mux_bulk_tx_urb); 2408 kfree(hso_net->mux_bulk_tx_buf); 2409 hso_net->mux_bulk_tx_buf = NULL; 2410 2411 if (hso_net->net) 2412 free_netdev(hso_net->net); 2413 2414 kfree(hso_dev); 2415 } 2416 2417 static const struct net_device_ops hso_netdev_ops = { 2418 .ndo_open = hso_net_open, 2419 .ndo_stop = hso_net_close, 2420 .ndo_start_xmit = hso_net_start_xmit, 2421 .ndo_tx_timeout = hso_net_tx_timeout, 2422 }; 2423 2424 /* initialize the network interface */ 2425 static void hso_net_init(struct net_device *net) 2426 { 2427 struct hso_net *hso_net = netdev_priv(net); 2428 2429 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2430 2431 /* fill in the other fields */ 2432 net->netdev_ops = &hso_netdev_ops; 2433 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2434 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2435 net->type = ARPHRD_NONE; 2436 net->mtu = DEFAULT_MTU - 14; 2437 net->tx_queue_len = 10; 2438 SET_ETHTOOL_OPS(net, &ops); 2439 2440 /* and initialize the semaphore */ 2441 spin_lock_init(&hso_net->net_lock); 2442 } 2443 2444 /* Adds a network device in the network device table */ 2445 static int add_net_device(struct hso_device *hso_dev) 2446 { 2447 int i; 2448 2449 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2450 if (network_table[i] == NULL) { 2451 network_table[i] = hso_dev; 2452 break; 2453 } 2454 } 2455 if (i == HSO_MAX_NET_DEVICES) 2456 return -1; 2457 return 0; 2458 } 2459 2460 static int hso_rfkill_set_block(void *data, bool blocked) 2461 { 2462 struct hso_device *hso_dev = data; 2463 int enabled = !blocked; 2464 int rv; 2465 2466 mutex_lock(&hso_dev->mutex); 2467 if (hso_dev->usb_gone) 2468 rv = 0; 2469 else 2470 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2471 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2472 USB_CTRL_SET_TIMEOUT); 2473 mutex_unlock(&hso_dev->mutex); 2474 return rv; 2475 } 2476 2477 static const struct rfkill_ops hso_rfkill_ops = { 2478 .set_block = hso_rfkill_set_block, 2479 }; 2480 2481 /* Creates and sets up everything for rfkill */ 2482 static void hso_create_rfkill(struct hso_device *hso_dev, 2483 struct usb_interface *interface) 2484 { 2485 struct hso_net *hso_net = dev2net(hso_dev); 2486 struct device *dev = &hso_net->net->dev; 2487 char *rfkn; 2488 2489 rfkn = kzalloc(20, GFP_KERNEL); 2490 if (!rfkn) 2491 dev_err(dev, "%s - Out of memory\n", __func__); 2492 2493 snprintf(rfkn, 20, "hso-%d", 2494 interface->altsetting->desc.bInterfaceNumber); 2495 2496 hso_net->rfkill = rfkill_alloc(rfkn, 2497 &interface_to_usbdev(interface)->dev, 2498 RFKILL_TYPE_WWAN, 2499 &hso_rfkill_ops, hso_dev); 2500 if (!hso_net->rfkill) { 2501 dev_err(dev, "%s - Out of memory\n", __func__); 2502 kfree(rfkn); 2503 return; 2504 } 2505 if (rfkill_register(hso_net->rfkill) < 0) { 2506 rfkill_destroy(hso_net->rfkill); 2507 kfree(rfkn); 2508 hso_net->rfkill = NULL; 2509 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2510 return; 2511 } 2512 } 2513 2514 static struct device_type hso_type = { 2515 .name = "wwan", 2516 }; 2517 2518 /* Creates our network device */ 2519 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2520 int port_spec) 2521 { 2522 int result, i; 2523 struct net_device *net; 2524 struct hso_net *hso_net; 2525 struct hso_device *hso_dev; 2526 2527 hso_dev = hso_create_device(interface, port_spec); 2528 if (!hso_dev) 2529 return NULL; 2530 2531 /* allocate our network device, then we can put in our private data */ 2532 /* call hso_net_init to do the basic initialization */ 2533 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2534 if (!net) { 2535 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2536 goto exit; 2537 } 2538 2539 hso_net = netdev_priv(net); 2540 2541 hso_dev->port_data.dev_net = hso_net; 2542 hso_net->net = net; 2543 hso_net->parent = hso_dev; 2544 2545 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2546 USB_DIR_IN); 2547 if (!hso_net->in_endp) { 2548 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2549 goto exit; 2550 } 2551 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2552 USB_DIR_OUT); 2553 if (!hso_net->out_endp) { 2554 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2555 goto exit; 2556 } 2557 SET_NETDEV_DEV(net, &interface->dev); 2558 SET_NETDEV_DEVTYPE(net, &hso_type); 2559 2560 /* registering our net device */ 2561 result = register_netdev(net); 2562 if (result) { 2563 dev_err(&interface->dev, "Failed to register device\n"); 2564 goto exit; 2565 } 2566 2567 /* start allocating */ 2568 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2569 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2570 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2571 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2572 goto exit; 2573 } 2574 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2575 GFP_KERNEL); 2576 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2577 goto exit; 2578 } 2579 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2580 if (!hso_net->mux_bulk_tx_urb) { 2581 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2582 goto exit; 2583 } 2584 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2585 if (!hso_net->mux_bulk_tx_buf) 2586 goto exit; 2587 2588 add_net_device(hso_dev); 2589 2590 hso_log_port(hso_dev); 2591 2592 hso_create_rfkill(hso_dev, interface); 2593 2594 return hso_dev; 2595 exit: 2596 hso_free_net_device(hso_dev); 2597 return NULL; 2598 } 2599 2600 static void hso_free_tiomget(struct hso_serial *serial) 2601 { 2602 struct hso_tiocmget *tiocmget; 2603 if (!serial) 2604 return; 2605 tiocmget = serial->tiocmget; 2606 if (tiocmget) { 2607 usb_free_urb(tiocmget->urb); 2608 tiocmget->urb = NULL; 2609 serial->tiocmget = NULL; 2610 kfree(tiocmget); 2611 } 2612 } 2613 2614 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2615 static void hso_free_serial_device(struct hso_device *hso_dev) 2616 { 2617 struct hso_serial *serial = dev2ser(hso_dev); 2618 2619 if (!serial) 2620 return; 2621 set_serial_by_index(serial->minor, NULL); 2622 2623 hso_serial_common_free(serial); 2624 2625 if (serial->shared_int) { 2626 mutex_lock(&serial->shared_int->shared_int_lock); 2627 if (--serial->shared_int->ref_count == 0) 2628 hso_free_shared_int(serial->shared_int); 2629 else 2630 mutex_unlock(&serial->shared_int->shared_int_lock); 2631 } 2632 hso_free_tiomget(serial); 2633 kfree(serial); 2634 kfree(hso_dev); 2635 } 2636 2637 /* Creates a bulk AT channel */ 2638 static struct hso_device *hso_create_bulk_serial_device( 2639 struct usb_interface *interface, int port) 2640 { 2641 struct hso_device *hso_dev; 2642 struct hso_serial *serial; 2643 int num_urbs; 2644 struct hso_tiocmget *tiocmget; 2645 2646 hso_dev = hso_create_device(interface, port); 2647 if (!hso_dev) 2648 return NULL; 2649 2650 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2651 if (!serial) 2652 goto exit; 2653 2654 serial->parent = hso_dev; 2655 hso_dev->port_data.dev_serial = serial; 2656 2657 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2658 num_urbs = 2; 2659 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2660 GFP_KERNEL); 2661 /* it isn't going to break our heart if serial->tiocmget 2662 * allocation fails don't bother checking this. 2663 */ 2664 if (serial->tiocmget) { 2665 tiocmget = serial->tiocmget; 2666 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2667 if (tiocmget->urb) { 2668 mutex_init(&tiocmget->mutex); 2669 init_waitqueue_head(&tiocmget->waitq); 2670 tiocmget->endp = hso_get_ep( 2671 interface, 2672 USB_ENDPOINT_XFER_INT, 2673 USB_DIR_IN); 2674 } else 2675 hso_free_tiomget(serial); 2676 } 2677 } 2678 else 2679 num_urbs = 1; 2680 2681 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2682 BULK_URB_TX_SIZE)) 2683 goto exit; 2684 2685 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2686 USB_DIR_IN); 2687 if (!serial->in_endp) { 2688 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2689 goto exit2; 2690 } 2691 2692 if (! 2693 (serial->out_endp = 2694 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2695 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2696 goto exit2; 2697 } 2698 2699 serial->write_data = hso_std_serial_write_data; 2700 2701 /* and record this serial */ 2702 set_serial_by_index(serial->minor, serial); 2703 2704 /* setup the proc dirs and files if needed */ 2705 hso_log_port(hso_dev); 2706 2707 /* done, return it */ 2708 return hso_dev; 2709 2710 exit2: 2711 hso_serial_common_free(serial); 2712 exit: 2713 hso_free_tiomget(serial); 2714 kfree(serial); 2715 kfree(hso_dev); 2716 return NULL; 2717 } 2718 2719 /* Creates a multiplexed AT channel */ 2720 static 2721 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2722 int port, 2723 struct hso_shared_int *mux) 2724 { 2725 struct hso_device *hso_dev; 2726 struct hso_serial *serial; 2727 int port_spec; 2728 2729 port_spec = HSO_INTF_MUX; 2730 port_spec &= ~HSO_PORT_MASK; 2731 2732 port_spec |= hso_mux_to_port(port); 2733 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2734 return NULL; 2735 2736 hso_dev = hso_create_device(interface, port_spec); 2737 if (!hso_dev) 2738 return NULL; 2739 2740 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2741 if (!serial) 2742 goto exit; 2743 2744 hso_dev->port_data.dev_serial = serial; 2745 serial->parent = hso_dev; 2746 2747 if (hso_serial_common_create 2748 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2749 goto exit; 2750 2751 serial->tx_data_length--; 2752 serial->write_data = hso_mux_serial_write_data; 2753 2754 serial->shared_int = mux; 2755 mutex_lock(&serial->shared_int->shared_int_lock); 2756 serial->shared_int->ref_count++; 2757 mutex_unlock(&serial->shared_int->shared_int_lock); 2758 2759 /* and record this serial */ 2760 set_serial_by_index(serial->minor, serial); 2761 2762 /* setup the proc dirs and files if needed */ 2763 hso_log_port(hso_dev); 2764 2765 /* done, return it */ 2766 return hso_dev; 2767 2768 exit: 2769 if (serial) { 2770 tty_unregister_device(tty_drv, serial->minor); 2771 kfree(serial); 2772 } 2773 if (hso_dev) 2774 kfree(hso_dev); 2775 return NULL; 2776 2777 } 2778 2779 static void hso_free_shared_int(struct hso_shared_int *mux) 2780 { 2781 usb_free_urb(mux->shared_intr_urb); 2782 kfree(mux->shared_intr_buf); 2783 mutex_unlock(&mux->shared_int_lock); 2784 kfree(mux); 2785 } 2786 2787 static 2788 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2789 { 2790 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2791 2792 if (!mux) 2793 return NULL; 2794 2795 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2796 USB_DIR_IN); 2797 if (!mux->intr_endp) { 2798 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2799 goto exit; 2800 } 2801 2802 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2803 if (!mux->shared_intr_urb) { 2804 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2805 goto exit; 2806 } 2807 mux->shared_intr_buf = 2808 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2809 GFP_KERNEL); 2810 if (!mux->shared_intr_buf) 2811 goto exit; 2812 2813 mutex_init(&mux->shared_int_lock); 2814 2815 return mux; 2816 2817 exit: 2818 kfree(mux->shared_intr_buf); 2819 usb_free_urb(mux->shared_intr_urb); 2820 kfree(mux); 2821 return NULL; 2822 } 2823 2824 /* Gets the port spec for a certain interface */ 2825 static int hso_get_config_data(struct usb_interface *interface) 2826 { 2827 struct usb_device *usbdev = interface_to_usbdev(interface); 2828 u8 *config_data = kmalloc(17, GFP_KERNEL); 2829 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2830 s32 result; 2831 2832 if (!config_data) 2833 return -ENOMEM; 2834 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2835 0x86, 0xC0, 0, 0, config_data, 17, 2836 USB_CTRL_SET_TIMEOUT) != 0x11) { 2837 kfree(config_data); 2838 return -EIO; 2839 } 2840 2841 switch (config_data[if_num]) { 2842 case 0x0: 2843 result = 0; 2844 break; 2845 case 0x1: 2846 result = HSO_PORT_DIAG; 2847 break; 2848 case 0x2: 2849 result = HSO_PORT_GPS; 2850 break; 2851 case 0x3: 2852 result = HSO_PORT_GPS_CONTROL; 2853 break; 2854 case 0x4: 2855 result = HSO_PORT_APP; 2856 break; 2857 case 0x5: 2858 result = HSO_PORT_APP2; 2859 break; 2860 case 0x6: 2861 result = HSO_PORT_CONTROL; 2862 break; 2863 case 0x7: 2864 result = HSO_PORT_NETWORK; 2865 break; 2866 case 0x8: 2867 result = HSO_PORT_MODEM; 2868 break; 2869 case 0x9: 2870 result = HSO_PORT_MSD; 2871 break; 2872 case 0xa: 2873 result = HSO_PORT_PCSC; 2874 break; 2875 case 0xb: 2876 result = HSO_PORT_VOICE; 2877 break; 2878 default: 2879 result = 0; 2880 } 2881 2882 if (result) 2883 result |= HSO_INTF_BULK; 2884 2885 if (config_data[16] & 0x1) 2886 result |= HSO_INFO_CRC_BUG; 2887 2888 kfree(config_data); 2889 return result; 2890 } 2891 2892 /* called once for each interface upon device insertion */ 2893 static int hso_probe(struct usb_interface *interface, 2894 const struct usb_device_id *id) 2895 { 2896 int mux, i, if_num, port_spec; 2897 unsigned char port_mask; 2898 struct hso_device *hso_dev = NULL; 2899 struct hso_shared_int *shared_int; 2900 struct hso_device *tmp_dev = NULL; 2901 2902 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2903 dev_err(&interface->dev, "Not our interface\n"); 2904 return -ENODEV; 2905 } 2906 2907 if_num = interface->altsetting->desc.bInterfaceNumber; 2908 2909 /* Get the interface/port specification from either driver_info or from 2910 * the device itself */ 2911 if (id->driver_info) 2912 port_spec = ((u32 *)(id->driver_info))[if_num]; 2913 else 2914 port_spec = hso_get_config_data(interface); 2915 2916 /* Check if we need to switch to alt interfaces prior to port 2917 * configuration */ 2918 if (interface->num_altsetting > 1) 2919 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2920 interface->needs_remote_wakeup = 1; 2921 2922 /* Allocate new hso device(s) */ 2923 switch (port_spec & HSO_INTF_MASK) { 2924 case HSO_INTF_MUX: 2925 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2926 /* Create the network device */ 2927 if (!disable_net) { 2928 hso_dev = hso_create_net_device(interface, 2929 port_spec); 2930 if (!hso_dev) 2931 goto exit; 2932 tmp_dev = hso_dev; 2933 } 2934 } 2935 2936 if (hso_get_mux_ports(interface, &port_mask)) 2937 /* TODO: de-allocate everything */ 2938 goto exit; 2939 2940 shared_int = hso_create_shared_int(interface); 2941 if (!shared_int) 2942 goto exit; 2943 2944 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2945 if (port_mask & i) { 2946 hso_dev = hso_create_mux_serial_device( 2947 interface, i, shared_int); 2948 if (!hso_dev) 2949 goto exit; 2950 } 2951 } 2952 2953 if (tmp_dev) 2954 hso_dev = tmp_dev; 2955 break; 2956 2957 case HSO_INTF_BULK: 2958 /* It's a regular bulk interface */ 2959 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2960 if (!disable_net) 2961 hso_dev = 2962 hso_create_net_device(interface, port_spec); 2963 } else { 2964 hso_dev = 2965 hso_create_bulk_serial_device(interface, port_spec); 2966 } 2967 if (!hso_dev) 2968 goto exit; 2969 break; 2970 default: 2971 goto exit; 2972 } 2973 2974 /* save our data pointer in this device */ 2975 usb_set_intfdata(interface, hso_dev); 2976 2977 /* done */ 2978 return 0; 2979 exit: 2980 hso_free_interface(interface); 2981 return -ENODEV; 2982 } 2983 2984 /* device removed, cleaning up */ 2985 static void hso_disconnect(struct usb_interface *interface) 2986 { 2987 hso_free_interface(interface); 2988 2989 /* remove reference of our private data */ 2990 usb_set_intfdata(interface, NULL); 2991 } 2992 2993 static void async_get_intf(struct work_struct *data) 2994 { 2995 struct hso_device *hso_dev = 2996 container_of(data, struct hso_device, async_get_intf); 2997 usb_autopm_get_interface(hso_dev->interface); 2998 } 2999 3000 static void async_put_intf(struct work_struct *data) 3001 { 3002 struct hso_device *hso_dev = 3003 container_of(data, struct hso_device, async_put_intf); 3004 usb_autopm_put_interface(hso_dev->interface); 3005 } 3006 3007 static int hso_get_activity(struct hso_device *hso_dev) 3008 { 3009 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3010 if (!hso_dev->is_active) { 3011 hso_dev->is_active = 1; 3012 schedule_work(&hso_dev->async_get_intf); 3013 } 3014 } 3015 3016 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3017 return -EAGAIN; 3018 3019 usb_mark_last_busy(hso_dev->usb); 3020 3021 return 0; 3022 } 3023 3024 static int hso_put_activity(struct hso_device *hso_dev) 3025 { 3026 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3027 if (hso_dev->is_active) { 3028 hso_dev->is_active = 0; 3029 schedule_work(&hso_dev->async_put_intf); 3030 return -EAGAIN; 3031 } 3032 } 3033 hso_dev->is_active = 0; 3034 return 0; 3035 } 3036 3037 /* called by kernel when we need to suspend device */ 3038 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3039 { 3040 int i, result; 3041 3042 /* Stop all serial ports */ 3043 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3044 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3045 result = hso_stop_serial_device(serial_table[i]); 3046 if (result) 3047 goto out; 3048 } 3049 } 3050 3051 /* Stop all network ports */ 3052 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3053 if (network_table[i] && 3054 (network_table[i]->interface == iface)) { 3055 result = hso_stop_net_device(network_table[i]); 3056 if (result) 3057 goto out; 3058 } 3059 } 3060 3061 out: 3062 return 0; 3063 } 3064 3065 /* called by kernel when we need to resume device */ 3066 static int hso_resume(struct usb_interface *iface) 3067 { 3068 int i, result = 0; 3069 struct hso_net *hso_net; 3070 3071 /* Start all serial ports */ 3072 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3073 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3074 if (dev2ser(serial_table[i])->port.count) { 3075 result = 3076 hso_start_serial_device(serial_table[i], GFP_NOIO); 3077 hso_kick_transmit(dev2ser(serial_table[i])); 3078 if (result) 3079 goto out; 3080 } 3081 } 3082 } 3083 3084 /* Start all network ports */ 3085 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3086 if (network_table[i] && 3087 (network_table[i]->interface == iface)) { 3088 hso_net = dev2net(network_table[i]); 3089 if (hso_net->flags & IFF_UP) { 3090 /* First transmit any lingering data, 3091 then restart the device. */ 3092 if (hso_net->skb_tx_buf) { 3093 dev_dbg(&iface->dev, 3094 "Transmitting" 3095 " lingering data\n"); 3096 hso_net_start_xmit(hso_net->skb_tx_buf, 3097 hso_net->net); 3098 hso_net->skb_tx_buf = NULL; 3099 } 3100 result = hso_start_net_device(network_table[i]); 3101 if (result) 3102 goto out; 3103 } 3104 } 3105 } 3106 3107 out: 3108 return result; 3109 } 3110 3111 static void reset_device(struct work_struct *data) 3112 { 3113 struct hso_device *hso_dev = 3114 container_of(data, struct hso_device, reset_device); 3115 struct usb_device *usb = hso_dev->usb; 3116 int result; 3117 3118 if (hso_dev->usb_gone) { 3119 D1("No reset during disconnect\n"); 3120 } else { 3121 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3122 if (result < 0) 3123 D1("unable to lock device for reset: %d\n", result); 3124 else { 3125 usb_reset_device(usb); 3126 usb_unlock_device(usb); 3127 } 3128 } 3129 } 3130 3131 static void hso_serial_ref_free(struct kref *ref) 3132 { 3133 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3134 3135 hso_free_serial_device(hso_dev); 3136 } 3137 3138 static void hso_free_interface(struct usb_interface *interface) 3139 { 3140 struct hso_serial *hso_dev; 3141 int i; 3142 3143 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3144 if (serial_table[i] && 3145 (serial_table[i]->interface == interface)) { 3146 hso_dev = dev2ser(serial_table[i]); 3147 tty_port_tty_hangup(&hso_dev->port, false); 3148 mutex_lock(&hso_dev->parent->mutex); 3149 hso_dev->parent->usb_gone = 1; 3150 mutex_unlock(&hso_dev->parent->mutex); 3151 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3152 } 3153 } 3154 3155 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3156 if (network_table[i] && 3157 (network_table[i]->interface == interface)) { 3158 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3159 /* hso_stop_net_device doesn't stop the net queue since 3160 * traffic needs to start it again when suspended */ 3161 netif_stop_queue(dev2net(network_table[i])->net); 3162 hso_stop_net_device(network_table[i]); 3163 cancel_work_sync(&network_table[i]->async_put_intf); 3164 cancel_work_sync(&network_table[i]->async_get_intf); 3165 if (rfk) { 3166 rfkill_unregister(rfk); 3167 rfkill_destroy(rfk); 3168 } 3169 hso_free_net_device(network_table[i]); 3170 } 3171 } 3172 } 3173 3174 /* Helper functions */ 3175 3176 /* Get the endpoint ! */ 3177 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3178 int type, int dir) 3179 { 3180 int i; 3181 struct usb_host_interface *iface = intf->cur_altsetting; 3182 struct usb_endpoint_descriptor *endp; 3183 3184 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3185 endp = &iface->endpoint[i].desc; 3186 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3187 (usb_endpoint_type(endp) == type)) 3188 return endp; 3189 } 3190 3191 return NULL; 3192 } 3193 3194 /* Get the byte that describes which ports are enabled */ 3195 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3196 { 3197 int i; 3198 struct usb_host_interface *iface = intf->cur_altsetting; 3199 3200 if (iface->extralen == 3) { 3201 *ports = iface->extra[2]; 3202 return 0; 3203 } 3204 3205 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3206 if (iface->endpoint[i].extralen == 3) { 3207 *ports = iface->endpoint[i].extra[2]; 3208 return 0; 3209 } 3210 } 3211 3212 return -1; 3213 } 3214 3215 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3216 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3217 struct usb_device *usb, gfp_t gfp) 3218 { 3219 int result; 3220 3221 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3222 usb_rcvintpipe(usb, 3223 shared_int->intr_endp->bEndpointAddress & 0x7F), 3224 shared_int->shared_intr_buf, 3225 1, 3226 intr_callback, shared_int, 3227 shared_int->intr_endp->bInterval); 3228 3229 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3230 if (result) 3231 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3232 result); 3233 3234 return result; 3235 } 3236 3237 /* operations setup of the serial interface */ 3238 static const struct tty_operations hso_serial_ops = { 3239 .open = hso_serial_open, 3240 .close = hso_serial_close, 3241 .write = hso_serial_write, 3242 .write_room = hso_serial_write_room, 3243 .ioctl = hso_serial_ioctl, 3244 .set_termios = hso_serial_set_termios, 3245 .chars_in_buffer = hso_serial_chars_in_buffer, 3246 .tiocmget = hso_serial_tiocmget, 3247 .tiocmset = hso_serial_tiocmset, 3248 .get_icount = hso_get_count, 3249 .unthrottle = hso_unthrottle 3250 }; 3251 3252 static struct usb_driver hso_driver = { 3253 .name = driver_name, 3254 .probe = hso_probe, 3255 .disconnect = hso_disconnect, 3256 .id_table = hso_ids, 3257 .suspend = hso_suspend, 3258 .resume = hso_resume, 3259 .reset_resume = hso_resume, 3260 .supports_autosuspend = 1, 3261 .disable_hub_initiated_lpm = 1, 3262 }; 3263 3264 static int __init hso_init(void) 3265 { 3266 int i; 3267 int result; 3268 3269 /* put it in the log */ 3270 printk(KERN_INFO "hso: %s\n", version); 3271 3272 /* Initialise the serial table semaphore and table */ 3273 spin_lock_init(&serial_table_lock); 3274 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3275 serial_table[i] = NULL; 3276 3277 /* allocate our driver using the proper amount of supported minors */ 3278 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3279 if (!tty_drv) 3280 return -ENOMEM; 3281 3282 /* fill in all needed values */ 3283 tty_drv->driver_name = driver_name; 3284 tty_drv->name = tty_filename; 3285 3286 /* if major number is provided as parameter, use that one */ 3287 if (tty_major) 3288 tty_drv->major = tty_major; 3289 3290 tty_drv->minor_start = 0; 3291 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3292 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3293 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3294 tty_drv->init_termios = tty_std_termios; 3295 hso_init_termios(&tty_drv->init_termios); 3296 tty_set_operations(tty_drv, &hso_serial_ops); 3297 3298 /* register the tty driver */ 3299 result = tty_register_driver(tty_drv); 3300 if (result) { 3301 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3302 __func__, result); 3303 goto err_free_tty; 3304 } 3305 3306 /* register this module as an usb driver */ 3307 result = usb_register(&hso_driver); 3308 if (result) { 3309 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3310 result); 3311 goto err_unreg_tty; 3312 } 3313 3314 /* done */ 3315 return 0; 3316 err_unreg_tty: 3317 tty_unregister_driver(tty_drv); 3318 err_free_tty: 3319 put_tty_driver(tty_drv); 3320 return result; 3321 } 3322 3323 static void __exit hso_exit(void) 3324 { 3325 printk(KERN_INFO "hso: unloaded\n"); 3326 3327 tty_unregister_driver(tty_drv); 3328 put_tty_driver(tty_drv); 3329 /* deregister the usb driver */ 3330 usb_deregister(&hso_driver); 3331 } 3332 3333 /* Module definitions */ 3334 module_init(hso_init); 3335 module_exit(hso_exit); 3336 3337 MODULE_AUTHOR(MOD_AUTHOR); 3338 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3339 MODULE_LICENSE(MOD_LICENSE); 3340 3341 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3342 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3343 module_param(debug, int, S_IRUGO | S_IWUSR); 3344 3345 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3346 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3347 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3348 3349 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3350 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3351 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3352