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 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1205 1206 /* sanity check */ 1207 if (!serial) { 1208 D1("serial == NULL"); 1209 return; 1210 } 1211 if (status) { 1212 handle_usb_error(status, __func__, serial->parent); 1213 return; 1214 } 1215 1216 D1("Actual length = %d\n", urb->actual_length); 1217 DUMP1(urb->transfer_buffer, urb->actual_length); 1218 1219 /* Anyone listening? */ 1220 if (serial->port.count == 0) 1221 return; 1222 1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1224 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1225 /* Valid data, handle RX data */ 1226 spin_lock(&serial->serial_lock); 1227 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1228 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1229 spin_unlock(&serial->serial_lock); 1230 } 1231 1232 /* 1233 * This needs to be a tasklet otherwise we will 1234 * end up recursively calling this function. 1235 */ 1236 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1237 { 1238 unsigned long flags; 1239 1240 spin_lock_irqsave(&serial->serial_lock, flags); 1241 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1242 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1243 else 1244 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1245 spin_unlock_irqrestore(&serial->serial_lock, flags); 1246 } 1247 1248 static void hso_unthrottle(struct tty_struct *tty) 1249 { 1250 struct hso_serial *serial = tty->driver_data; 1251 1252 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1253 } 1254 1255 static void hso_unthrottle_workfunc(struct work_struct *work) 1256 { 1257 struct hso_serial *serial = 1258 container_of(work, struct hso_serial, 1259 retry_unthrottle_workqueue); 1260 hso_unthrottle_tasklet(serial); 1261 } 1262 1263 /* open the requested serial port */ 1264 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1265 { 1266 struct hso_serial *serial = get_serial_by_index(tty->index); 1267 int result; 1268 1269 /* sanity check */ 1270 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1271 WARN_ON(1); 1272 tty->driver_data = NULL; 1273 D1("Failed to open port"); 1274 return -ENODEV; 1275 } 1276 1277 mutex_lock(&serial->parent->mutex); 1278 result = usb_autopm_get_interface(serial->parent->interface); 1279 if (result < 0) 1280 goto err_out; 1281 1282 D1("Opening %d", serial->minor); 1283 kref_get(&serial->parent->ref); 1284 1285 /* setup */ 1286 tty->driver_data = serial; 1287 tty_port_tty_set(&serial->port, tty); 1288 1289 /* check for port already opened, if not set the termios */ 1290 serial->port.count++; 1291 if (serial->port.count == 1) { 1292 serial->rx_state = RX_IDLE; 1293 /* Force default termio settings */ 1294 _hso_serial_set_termios(tty, NULL); 1295 tasklet_init(&serial->unthrottle_tasklet, 1296 (void (*)(unsigned long))hso_unthrottle_tasklet, 1297 (unsigned long)serial); 1298 INIT_WORK(&serial->retry_unthrottle_workqueue, 1299 hso_unthrottle_workfunc); 1300 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1301 if (result) { 1302 hso_stop_serial_device(serial->parent); 1303 serial->port.count--; 1304 kref_put(&serial->parent->ref, hso_serial_ref_free); 1305 } 1306 } else { 1307 D1("Port was already open"); 1308 } 1309 1310 usb_autopm_put_interface(serial->parent->interface); 1311 1312 /* done */ 1313 if (result) 1314 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1315 err_out: 1316 mutex_unlock(&serial->parent->mutex); 1317 return result; 1318 } 1319 1320 /* close the requested serial port */ 1321 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1322 { 1323 struct hso_serial *serial = tty->driver_data; 1324 u8 usb_gone; 1325 1326 D1("Closing serial port"); 1327 1328 /* Open failed, no close cleanup required */ 1329 if (serial == NULL) 1330 return; 1331 1332 mutex_lock(&serial->parent->mutex); 1333 usb_gone = serial->parent->usb_gone; 1334 1335 if (!usb_gone) 1336 usb_autopm_get_interface(serial->parent->interface); 1337 1338 /* reset the rts and dtr */ 1339 /* do the actual close */ 1340 serial->port.count--; 1341 1342 if (serial->port.count <= 0) { 1343 serial->port.count = 0; 1344 tty_port_tty_set(&serial->port, NULL); 1345 if (!usb_gone) 1346 hso_stop_serial_device(serial->parent); 1347 tasklet_kill(&serial->unthrottle_tasklet); 1348 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1349 } 1350 1351 if (!usb_gone) 1352 usb_autopm_put_interface(serial->parent->interface); 1353 1354 mutex_unlock(&serial->parent->mutex); 1355 1356 kref_put(&serial->parent->ref, hso_serial_ref_free); 1357 } 1358 1359 /* close the requested serial port */ 1360 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1361 int count) 1362 { 1363 struct hso_serial *serial = tty->driver_data; 1364 int space, tx_bytes; 1365 unsigned long flags; 1366 1367 /* sanity check */ 1368 if (serial == NULL) { 1369 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1370 return -ENODEV; 1371 } 1372 1373 spin_lock_irqsave(&serial->serial_lock, flags); 1374 1375 space = serial->tx_data_length - serial->tx_buffer_count; 1376 tx_bytes = (count < space) ? count : space; 1377 1378 if (!tx_bytes) 1379 goto out; 1380 1381 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1382 serial->tx_buffer_count += tx_bytes; 1383 1384 out: 1385 spin_unlock_irqrestore(&serial->serial_lock, flags); 1386 1387 hso_kick_transmit(serial); 1388 /* done */ 1389 return tx_bytes; 1390 } 1391 1392 /* how much room is there for writing */ 1393 static int hso_serial_write_room(struct tty_struct *tty) 1394 { 1395 struct hso_serial *serial = tty->driver_data; 1396 int room; 1397 unsigned long flags; 1398 1399 spin_lock_irqsave(&serial->serial_lock, flags); 1400 room = serial->tx_data_length - serial->tx_buffer_count; 1401 spin_unlock_irqrestore(&serial->serial_lock, flags); 1402 1403 /* return free room */ 1404 return room; 1405 } 1406 1407 /* setup the term */ 1408 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1409 { 1410 struct hso_serial *serial = tty->driver_data; 1411 unsigned long flags; 1412 1413 if (old) 1414 D5("Termios called with: cflags new[%d] - old[%d]", 1415 tty->termios.c_cflag, old->c_cflag); 1416 1417 /* the actual setup */ 1418 spin_lock_irqsave(&serial->serial_lock, flags); 1419 if (serial->port.count) 1420 _hso_serial_set_termios(tty, old); 1421 else 1422 tty->termios = *old; 1423 spin_unlock_irqrestore(&serial->serial_lock, flags); 1424 1425 /* done */ 1426 } 1427 1428 /* how many characters in the buffer */ 1429 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1430 { 1431 struct hso_serial *serial = tty->driver_data; 1432 int chars; 1433 unsigned long flags; 1434 1435 /* sanity check */ 1436 if (serial == NULL) 1437 return 0; 1438 1439 spin_lock_irqsave(&serial->serial_lock, flags); 1440 chars = serial->tx_buffer_count; 1441 spin_unlock_irqrestore(&serial->serial_lock, flags); 1442 1443 return chars; 1444 } 1445 static int tiocmget_submit_urb(struct hso_serial *serial, 1446 struct hso_tiocmget *tiocmget, 1447 struct usb_device *usb) 1448 { 1449 int result; 1450 1451 if (serial->parent->usb_gone) 1452 return -ENODEV; 1453 usb_fill_int_urb(tiocmget->urb, usb, 1454 usb_rcvintpipe(usb, 1455 tiocmget->endp-> 1456 bEndpointAddress & 0x7F), 1457 &tiocmget->serial_state_notification, 1458 sizeof(struct hso_serial_state_notification), 1459 tiocmget_intr_callback, serial, 1460 tiocmget->endp->bInterval); 1461 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1462 if (result) { 1463 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1464 result); 1465 } 1466 return result; 1467 1468 } 1469 1470 static void tiocmget_intr_callback(struct urb *urb) 1471 { 1472 struct hso_serial *serial = urb->context; 1473 struct hso_tiocmget *tiocmget; 1474 int status = urb->status; 1475 u16 UART_state_bitmap, prev_UART_state_bitmap; 1476 struct uart_icount *icount; 1477 struct hso_serial_state_notification *serial_state_notification; 1478 struct usb_device *usb; 1479 int if_num; 1480 1481 /* Sanity checks */ 1482 if (!serial) 1483 return; 1484 if (status) { 1485 handle_usb_error(status, __func__, serial->parent); 1486 return; 1487 } 1488 1489 /* tiocmget is only supported on HSO_PORT_MODEM */ 1490 tiocmget = serial->tiocmget; 1491 if (!tiocmget) 1492 return; 1493 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1494 1495 usb = serial->parent->usb; 1496 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1497 1498 /* wIndex should be the USB interface number of the port to which the 1499 * notification applies, which should always be the Modem port. 1500 */ 1501 serial_state_notification = &tiocmget->serial_state_notification; 1502 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1503 serial_state_notification->bNotification != B_NOTIFICATION || 1504 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1505 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1506 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1507 dev_warn(&usb->dev, 1508 "hso received invalid serial state notification\n"); 1509 DUMP(serial_state_notification, 1510 sizeof(struct hso_serial_state_notification)); 1511 } else { 1512 1513 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1514 UART_state_bitmap); 1515 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1516 icount = &tiocmget->icount; 1517 spin_lock(&serial->serial_lock); 1518 if ((UART_state_bitmap & B_OVERRUN) != 1519 (prev_UART_state_bitmap & B_OVERRUN)) 1520 icount->parity++; 1521 if ((UART_state_bitmap & B_PARITY) != 1522 (prev_UART_state_bitmap & B_PARITY)) 1523 icount->parity++; 1524 if ((UART_state_bitmap & B_FRAMING) != 1525 (prev_UART_state_bitmap & B_FRAMING)) 1526 icount->frame++; 1527 if ((UART_state_bitmap & B_RING_SIGNAL) && 1528 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1529 icount->rng++; 1530 if ((UART_state_bitmap & B_BREAK) != 1531 (prev_UART_state_bitmap & B_BREAK)) 1532 icount->brk++; 1533 if ((UART_state_bitmap & B_TX_CARRIER) != 1534 (prev_UART_state_bitmap & B_TX_CARRIER)) 1535 icount->dsr++; 1536 if ((UART_state_bitmap & B_RX_CARRIER) != 1537 (prev_UART_state_bitmap & B_RX_CARRIER)) 1538 icount->dcd++; 1539 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1540 spin_unlock(&serial->serial_lock); 1541 tiocmget->intr_completed = 1; 1542 wake_up_interruptible(&tiocmget->waitq); 1543 } 1544 memset(serial_state_notification, 0, 1545 sizeof(struct hso_serial_state_notification)); 1546 tiocmget_submit_urb(serial, 1547 tiocmget, 1548 serial->parent->usb); 1549 } 1550 1551 /* 1552 * next few functions largely stolen from drivers/serial/serial_core.c 1553 */ 1554 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1555 * - mask passed in arg for lines of interest 1556 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1557 * Caller should use TIOCGICOUNT to see which one it was 1558 */ 1559 static int 1560 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1561 { 1562 DECLARE_WAITQUEUE(wait, current); 1563 struct uart_icount cprev, cnow; 1564 struct hso_tiocmget *tiocmget; 1565 int ret; 1566 1567 tiocmget = serial->tiocmget; 1568 if (!tiocmget) 1569 return -ENOENT; 1570 /* 1571 * note the counters on entry 1572 */ 1573 spin_lock_irq(&serial->serial_lock); 1574 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1575 spin_unlock_irq(&serial->serial_lock); 1576 add_wait_queue(&tiocmget->waitq, &wait); 1577 for (;;) { 1578 spin_lock_irq(&serial->serial_lock); 1579 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1580 spin_unlock_irq(&serial->serial_lock); 1581 set_current_state(TASK_INTERRUPTIBLE); 1582 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1583 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1584 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1585 ret = 0; 1586 break; 1587 } 1588 schedule(); 1589 /* see if a signal did it */ 1590 if (signal_pending(current)) { 1591 ret = -ERESTARTSYS; 1592 break; 1593 } 1594 cprev = cnow; 1595 } 1596 current->state = TASK_RUNNING; 1597 remove_wait_queue(&tiocmget->waitq, &wait); 1598 1599 return ret; 1600 } 1601 1602 /* 1603 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1604 * Return: write counters to the user passed counter struct 1605 * NB: both 1->0 and 0->1 transitions are counted except for 1606 * RI where only 0->1 is counted. 1607 */ 1608 static int hso_get_count(struct tty_struct *tty, 1609 struct serial_icounter_struct *icount) 1610 { 1611 struct uart_icount cnow; 1612 struct hso_serial *serial = tty->driver_data; 1613 struct hso_tiocmget *tiocmget = serial->tiocmget; 1614 1615 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1616 1617 if (!tiocmget) 1618 return -ENOENT; 1619 spin_lock_irq(&serial->serial_lock); 1620 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1621 spin_unlock_irq(&serial->serial_lock); 1622 1623 icount->cts = cnow.cts; 1624 icount->dsr = cnow.dsr; 1625 icount->rng = cnow.rng; 1626 icount->dcd = cnow.dcd; 1627 icount->rx = cnow.rx; 1628 icount->tx = cnow.tx; 1629 icount->frame = cnow.frame; 1630 icount->overrun = cnow.overrun; 1631 icount->parity = cnow.parity; 1632 icount->brk = cnow.brk; 1633 icount->buf_overrun = cnow.buf_overrun; 1634 1635 return 0; 1636 } 1637 1638 1639 static int hso_serial_tiocmget(struct tty_struct *tty) 1640 { 1641 int retval; 1642 struct hso_serial *serial = tty->driver_data; 1643 struct hso_tiocmget *tiocmget; 1644 u16 UART_state_bitmap; 1645 1646 /* sanity check */ 1647 if (!serial) { 1648 D1("no tty structures"); 1649 return -EINVAL; 1650 } 1651 spin_lock_irq(&serial->serial_lock); 1652 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1653 ((serial->dtr_state) ? TIOCM_DTR : 0); 1654 tiocmget = serial->tiocmget; 1655 if (tiocmget) { 1656 1657 UART_state_bitmap = le16_to_cpu( 1658 tiocmget->prev_UART_state_bitmap); 1659 if (UART_state_bitmap & B_RING_SIGNAL) 1660 retval |= TIOCM_RNG; 1661 if (UART_state_bitmap & B_RX_CARRIER) 1662 retval |= TIOCM_CD; 1663 if (UART_state_bitmap & B_TX_CARRIER) 1664 retval |= TIOCM_DSR; 1665 } 1666 spin_unlock_irq(&serial->serial_lock); 1667 return retval; 1668 } 1669 1670 static int hso_serial_tiocmset(struct tty_struct *tty, 1671 unsigned int set, unsigned int clear) 1672 { 1673 int val = 0; 1674 unsigned long flags; 1675 int if_num; 1676 struct hso_serial *serial = tty->driver_data; 1677 1678 /* sanity check */ 1679 if (!serial) { 1680 D1("no tty structures"); 1681 return -EINVAL; 1682 } 1683 1684 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1685 return -EINVAL; 1686 1687 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1688 1689 spin_lock_irqsave(&serial->serial_lock, flags); 1690 if (set & TIOCM_RTS) 1691 serial->rts_state = 1; 1692 if (set & TIOCM_DTR) 1693 serial->dtr_state = 1; 1694 1695 if (clear & TIOCM_RTS) 1696 serial->rts_state = 0; 1697 if (clear & TIOCM_DTR) 1698 serial->dtr_state = 0; 1699 1700 if (serial->dtr_state) 1701 val |= 0x01; 1702 if (serial->rts_state) 1703 val |= 0x02; 1704 1705 spin_unlock_irqrestore(&serial->serial_lock, flags); 1706 1707 return usb_control_msg(serial->parent->usb, 1708 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1709 0x21, val, if_num, NULL, 0, 1710 USB_CTRL_SET_TIMEOUT); 1711 } 1712 1713 static int hso_serial_ioctl(struct tty_struct *tty, 1714 unsigned int cmd, unsigned long arg) 1715 { 1716 struct hso_serial *serial = tty->driver_data; 1717 int ret = 0; 1718 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1719 1720 if (!serial) 1721 return -ENODEV; 1722 switch (cmd) { 1723 case TIOCMIWAIT: 1724 ret = hso_wait_modem_status(serial, arg); 1725 break; 1726 default: 1727 ret = -ENOIOCTLCMD; 1728 break; 1729 } 1730 return ret; 1731 } 1732 1733 1734 /* starts a transmit */ 1735 static void hso_kick_transmit(struct hso_serial *serial) 1736 { 1737 u8 *temp; 1738 unsigned long flags; 1739 int res; 1740 1741 spin_lock_irqsave(&serial->serial_lock, flags); 1742 if (!serial->tx_buffer_count) 1743 goto out; 1744 1745 if (serial->tx_urb_used) 1746 goto out; 1747 1748 /* Wakeup USB interface if necessary */ 1749 if (hso_get_activity(serial->parent) == -EAGAIN) 1750 goto out; 1751 1752 /* Switch pointers around to avoid memcpy */ 1753 temp = serial->tx_buffer; 1754 serial->tx_buffer = serial->tx_data; 1755 serial->tx_data = temp; 1756 serial->tx_data_count = serial->tx_buffer_count; 1757 serial->tx_buffer_count = 0; 1758 1759 /* If temp is set, it means we switched buffers */ 1760 if (temp && serial->write_data) { 1761 res = serial->write_data(serial); 1762 if (res >= 0) 1763 serial->tx_urb_used = 1; 1764 } 1765 out: 1766 spin_unlock_irqrestore(&serial->serial_lock, flags); 1767 } 1768 1769 /* make a request (for reading and writing data to muxed serial port) */ 1770 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1771 struct urb *ctrl_urb, 1772 struct usb_ctrlrequest *ctrl_req, 1773 u8 *ctrl_urb_data, u32 size) 1774 { 1775 int result; 1776 int pipe; 1777 1778 /* Sanity check */ 1779 if (!serial || !ctrl_urb || !ctrl_req) { 1780 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1781 return -EINVAL; 1782 } 1783 1784 /* initialize */ 1785 ctrl_req->wValue = 0; 1786 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1787 ctrl_req->wLength = cpu_to_le16(size); 1788 1789 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1790 /* Reading command */ 1791 ctrl_req->bRequestType = USB_DIR_IN | 1792 USB_TYPE_OPTION_VENDOR | 1793 USB_RECIP_INTERFACE; 1794 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1795 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1796 } else { 1797 /* Writing command */ 1798 ctrl_req->bRequestType = USB_DIR_OUT | 1799 USB_TYPE_OPTION_VENDOR | 1800 USB_RECIP_INTERFACE; 1801 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1802 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1803 } 1804 /* syslog */ 1805 D2("%s command (%02x) len: %d, port: %d", 1806 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1807 ctrl_req->bRequestType, ctrl_req->wLength, port); 1808 1809 /* Load ctrl urb */ 1810 ctrl_urb->transfer_flags = 0; 1811 usb_fill_control_urb(ctrl_urb, 1812 serial->parent->usb, 1813 pipe, 1814 (u8 *) ctrl_req, 1815 ctrl_urb_data, size, ctrl_callback, serial); 1816 /* Send it on merry way */ 1817 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1818 if (result) { 1819 dev_err(&ctrl_urb->dev->dev, 1820 "%s failed submit ctrl_urb %d type %d\n", __func__, 1821 result, type); 1822 return result; 1823 } 1824 1825 /* done */ 1826 return size; 1827 } 1828 1829 /* called by intr_callback when read occurs */ 1830 static int hso_mux_serial_read(struct hso_serial *serial) 1831 { 1832 if (!serial) 1833 return -EINVAL; 1834 1835 /* clean data */ 1836 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1837 /* make the request */ 1838 1839 if (serial->num_rx_urbs != 1) { 1840 dev_err(&serial->parent->interface->dev, 1841 "ERROR: mux'd reads with multiple buffers " 1842 "not possible\n"); 1843 return 0; 1844 } 1845 return mux_device_request(serial, 1846 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1847 serial->parent->port_spec & HSO_PORT_MASK, 1848 serial->rx_urb[0], 1849 &serial->ctrl_req_rx, 1850 serial->rx_data[0], serial->rx_data_length); 1851 } 1852 1853 /* used for muxed serial port callback (muxed serial read) */ 1854 static void intr_callback(struct urb *urb) 1855 { 1856 struct hso_shared_int *shared_int = urb->context; 1857 struct hso_serial *serial; 1858 unsigned char *port_req; 1859 int status = urb->status; 1860 int i; 1861 1862 usb_mark_last_busy(urb->dev); 1863 1864 /* sanity check */ 1865 if (!shared_int) 1866 return; 1867 1868 /* status check */ 1869 if (status) { 1870 handle_usb_error(status, __func__, NULL); 1871 return; 1872 } 1873 D4("\n--- Got intr callback 0x%02X ---", status); 1874 1875 /* what request? */ 1876 port_req = urb->transfer_buffer; 1877 D4(" port_req = 0x%.2X\n", *port_req); 1878 /* loop over all muxed ports to find the one sending this */ 1879 for (i = 0; i < 8; i++) { 1880 /* max 8 channels on MUX */ 1881 if (*port_req & (1 << i)) { 1882 serial = get_serial_by_shared_int_and_type(shared_int, 1883 (1 << i)); 1884 if (serial != NULL) { 1885 D1("Pending read interrupt on port %d\n", i); 1886 spin_lock(&serial->serial_lock); 1887 if (serial->rx_state == RX_IDLE && 1888 serial->port.count > 0) { 1889 /* Setup and send a ctrl req read on 1890 * port i */ 1891 if (!serial->rx_urb_filled[0]) { 1892 serial->rx_state = RX_SENT; 1893 hso_mux_serial_read(serial); 1894 } else 1895 serial->rx_state = RX_PENDING; 1896 } else { 1897 D1("Already a read pending on " 1898 "port %d or port not open\n", i); 1899 } 1900 spin_unlock(&serial->serial_lock); 1901 } 1902 } 1903 } 1904 /* Resubmit interrupt urb */ 1905 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1906 } 1907 1908 /* called for writing to muxed serial port */ 1909 static int hso_mux_serial_write_data(struct hso_serial *serial) 1910 { 1911 if (NULL == serial) 1912 return -EINVAL; 1913 1914 return mux_device_request(serial, 1915 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1916 serial->parent->port_spec & HSO_PORT_MASK, 1917 serial->tx_urb, 1918 &serial->ctrl_req_tx, 1919 serial->tx_data, serial->tx_data_count); 1920 } 1921 1922 /* write callback for Diag and CS port */ 1923 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1924 { 1925 struct hso_serial *serial = urb->context; 1926 int status = urb->status; 1927 1928 /* sanity check */ 1929 if (!serial) { 1930 D1("serial == NULL"); 1931 return; 1932 } 1933 1934 spin_lock(&serial->serial_lock); 1935 serial->tx_urb_used = 0; 1936 spin_unlock(&serial->serial_lock); 1937 if (status) { 1938 handle_usb_error(status, __func__, serial->parent); 1939 return; 1940 } 1941 hso_put_activity(serial->parent); 1942 tty_port_tty_wakeup(&serial->port); 1943 hso_kick_transmit(serial); 1944 1945 D1(" "); 1946 } 1947 1948 /* called for writing diag or CS serial port */ 1949 static int hso_std_serial_write_data(struct hso_serial *serial) 1950 { 1951 int count = serial->tx_data_count; 1952 int result; 1953 1954 usb_fill_bulk_urb(serial->tx_urb, 1955 serial->parent->usb, 1956 usb_sndbulkpipe(serial->parent->usb, 1957 serial->out_endp-> 1958 bEndpointAddress & 0x7F), 1959 serial->tx_data, serial->tx_data_count, 1960 hso_std_serial_write_bulk_callback, serial); 1961 1962 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1963 if (result) { 1964 dev_warn(&serial->parent->usb->dev, 1965 "Failed to submit urb - res %d\n", result); 1966 return result; 1967 } 1968 1969 return count; 1970 } 1971 1972 /* callback after read or write on muxed serial port */ 1973 static void ctrl_callback(struct urb *urb) 1974 { 1975 struct hso_serial *serial = urb->context; 1976 struct usb_ctrlrequest *req; 1977 int status = urb->status; 1978 1979 /* sanity check */ 1980 if (!serial) 1981 return; 1982 1983 spin_lock(&serial->serial_lock); 1984 serial->tx_urb_used = 0; 1985 spin_unlock(&serial->serial_lock); 1986 if (status) { 1987 handle_usb_error(status, __func__, serial->parent); 1988 return; 1989 } 1990 1991 /* what request? */ 1992 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1993 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1994 D4("Actual length of urb = %d\n", urb->actual_length); 1995 DUMP1(urb->transfer_buffer, urb->actual_length); 1996 1997 if (req->bRequestType == 1998 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1999 /* response to a read command */ 2000 serial->rx_urb_filled[0] = 1; 2001 spin_lock(&serial->serial_lock); 2002 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2003 spin_unlock(&serial->serial_lock); 2004 } else { 2005 hso_put_activity(serial->parent); 2006 tty_port_tty_wakeup(&serial->port); 2007 /* response to a write command */ 2008 hso_kick_transmit(serial); 2009 } 2010 } 2011 2012 /* handle RX data for serial port */ 2013 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2014 { 2015 struct tty_struct *tty; 2016 int write_length_remaining = 0; 2017 int curr_write_len; 2018 2019 /* Sanity check */ 2020 if (urb == NULL || serial == NULL) { 2021 D1("serial = NULL"); 2022 return -2; 2023 } 2024 2025 tty = tty_port_tty_get(&serial->port); 2026 2027 /* Push data to tty */ 2028 write_length_remaining = urb->actual_length - 2029 serial->curr_rx_urb_offset; 2030 D1("data to push to tty"); 2031 while (write_length_remaining) { 2032 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2033 tty_kref_put(tty); 2034 return -1; 2035 } 2036 curr_write_len = tty_insert_flip_string(&serial->port, 2037 urb->transfer_buffer + serial->curr_rx_urb_offset, 2038 write_length_remaining); 2039 serial->curr_rx_urb_offset += curr_write_len; 2040 write_length_remaining -= curr_write_len; 2041 tty_flip_buffer_push(&serial->port); 2042 } 2043 tty_kref_put(tty); 2044 2045 if (write_length_remaining == 0) { 2046 serial->curr_rx_urb_offset = 0; 2047 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2048 } 2049 return write_length_remaining; 2050 } 2051 2052 2053 /* Base driver functions */ 2054 2055 static void hso_log_port(struct hso_device *hso_dev) 2056 { 2057 char *port_type; 2058 char port_dev[20]; 2059 2060 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2061 case HSO_PORT_CONTROL: 2062 port_type = "Control"; 2063 break; 2064 case HSO_PORT_APP: 2065 port_type = "Application"; 2066 break; 2067 case HSO_PORT_GPS: 2068 port_type = "GPS"; 2069 break; 2070 case HSO_PORT_GPS_CONTROL: 2071 port_type = "GPS control"; 2072 break; 2073 case HSO_PORT_APP2: 2074 port_type = "Application2"; 2075 break; 2076 case HSO_PORT_PCSC: 2077 port_type = "PCSC"; 2078 break; 2079 case HSO_PORT_DIAG: 2080 port_type = "Diagnostic"; 2081 break; 2082 case HSO_PORT_DIAG2: 2083 port_type = "Diagnostic2"; 2084 break; 2085 case HSO_PORT_MODEM: 2086 port_type = "Modem"; 2087 break; 2088 case HSO_PORT_NETWORK: 2089 port_type = "Network"; 2090 break; 2091 default: 2092 port_type = "Unknown"; 2093 break; 2094 } 2095 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2096 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2097 } else 2098 sprintf(port_dev, "/dev/%s%d", tty_filename, 2099 dev2ser(hso_dev)->minor); 2100 2101 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2102 port_type, port_dev); 2103 } 2104 2105 static int hso_start_net_device(struct hso_device *hso_dev) 2106 { 2107 int i, result = 0; 2108 struct hso_net *hso_net = dev2net(hso_dev); 2109 2110 if (!hso_net) 2111 return -ENODEV; 2112 2113 /* send URBs for all read buffers */ 2114 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2115 2116 /* Prep a receive URB */ 2117 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2118 hso_dev->usb, 2119 usb_rcvbulkpipe(hso_dev->usb, 2120 hso_net->in_endp-> 2121 bEndpointAddress & 0x7F), 2122 hso_net->mux_bulk_rx_buf_pool[i], 2123 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2124 hso_net); 2125 2126 /* Put it out there so the device can send us stuff */ 2127 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2128 GFP_NOIO); 2129 if (result) 2130 dev_warn(&hso_dev->usb->dev, 2131 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2132 i, result); 2133 } 2134 2135 return result; 2136 } 2137 2138 static int hso_stop_net_device(struct hso_device *hso_dev) 2139 { 2140 int i; 2141 struct hso_net *hso_net = dev2net(hso_dev); 2142 2143 if (!hso_net) 2144 return -ENODEV; 2145 2146 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2147 if (hso_net->mux_bulk_rx_urb_pool[i]) 2148 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2149 2150 } 2151 if (hso_net->mux_bulk_tx_urb) 2152 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2153 2154 return 0; 2155 } 2156 2157 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2158 { 2159 int i, result = 0; 2160 struct hso_serial *serial = dev2ser(hso_dev); 2161 2162 if (!serial) 2163 return -ENODEV; 2164 2165 /* If it is not the MUX port fill in and submit a bulk urb (already 2166 * allocated in hso_serial_start) */ 2167 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2168 for (i = 0; i < serial->num_rx_urbs; i++) { 2169 usb_fill_bulk_urb(serial->rx_urb[i], 2170 serial->parent->usb, 2171 usb_rcvbulkpipe(serial->parent->usb, 2172 serial->in_endp-> 2173 bEndpointAddress & 2174 0x7F), 2175 serial->rx_data[i], 2176 serial->rx_data_length, 2177 hso_std_serial_read_bulk_callback, 2178 serial); 2179 result = usb_submit_urb(serial->rx_urb[i], flags); 2180 if (result) { 2181 dev_warn(&serial->parent->usb->dev, 2182 "Failed to submit urb - res %d\n", 2183 result); 2184 break; 2185 } 2186 } 2187 } else { 2188 mutex_lock(&serial->shared_int->shared_int_lock); 2189 if (!serial->shared_int->use_count) { 2190 result = 2191 hso_mux_submit_intr_urb(serial->shared_int, 2192 hso_dev->usb, flags); 2193 } 2194 serial->shared_int->use_count++; 2195 mutex_unlock(&serial->shared_int->shared_int_lock); 2196 } 2197 if (serial->tiocmget) 2198 tiocmget_submit_urb(serial, 2199 serial->tiocmget, 2200 serial->parent->usb); 2201 return result; 2202 } 2203 2204 static int hso_stop_serial_device(struct hso_device *hso_dev) 2205 { 2206 int i; 2207 struct hso_serial *serial = dev2ser(hso_dev); 2208 struct hso_tiocmget *tiocmget; 2209 2210 if (!serial) 2211 return -ENODEV; 2212 2213 for (i = 0; i < serial->num_rx_urbs; i++) { 2214 if (serial->rx_urb[i]) { 2215 usb_kill_urb(serial->rx_urb[i]); 2216 serial->rx_urb_filled[i] = 0; 2217 } 2218 } 2219 serial->curr_rx_urb_idx = 0; 2220 serial->curr_rx_urb_offset = 0; 2221 2222 if (serial->tx_urb) 2223 usb_kill_urb(serial->tx_urb); 2224 2225 if (serial->shared_int) { 2226 mutex_lock(&serial->shared_int->shared_int_lock); 2227 if (serial->shared_int->use_count && 2228 (--serial->shared_int->use_count == 0)) { 2229 struct urb *urb; 2230 2231 urb = serial->shared_int->shared_intr_urb; 2232 if (urb) 2233 usb_kill_urb(urb); 2234 } 2235 mutex_unlock(&serial->shared_int->shared_int_lock); 2236 } 2237 tiocmget = serial->tiocmget; 2238 if (tiocmget) { 2239 wake_up_interruptible(&tiocmget->waitq); 2240 usb_kill_urb(tiocmget->urb); 2241 } 2242 2243 return 0; 2244 } 2245 2246 static void hso_serial_common_free(struct hso_serial *serial) 2247 { 2248 int i; 2249 2250 if (serial->parent->dev) 2251 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2252 2253 tty_unregister_device(tty_drv, serial->minor); 2254 2255 for (i = 0; i < serial->num_rx_urbs; i++) { 2256 /* unlink and free RX URB */ 2257 usb_free_urb(serial->rx_urb[i]); 2258 /* free the RX buffer */ 2259 kfree(serial->rx_data[i]); 2260 } 2261 2262 /* unlink and free TX URB */ 2263 usb_free_urb(serial->tx_urb); 2264 kfree(serial->tx_data); 2265 tty_port_destroy(&serial->port); 2266 } 2267 2268 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2269 int rx_size, int tx_size) 2270 { 2271 struct device *dev; 2272 int minor; 2273 int i; 2274 2275 tty_port_init(&serial->port); 2276 2277 minor = get_free_serial_index(); 2278 if (minor < 0) 2279 goto exit; 2280 2281 /* register our minor number */ 2282 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv, 2283 minor, &serial->parent->interface->dev); 2284 dev = serial->parent->dev; 2285 dev_set_drvdata(dev, serial->parent); 2286 i = device_create_file(dev, &dev_attr_hsotype); 2287 2288 /* fill in specific data for later use */ 2289 serial->minor = minor; 2290 serial->magic = HSO_SERIAL_MAGIC; 2291 spin_lock_init(&serial->serial_lock); 2292 serial->num_rx_urbs = num_urbs; 2293 2294 /* RX, allocate urb and initialize */ 2295 2296 /* prepare our RX buffer */ 2297 serial->rx_data_length = rx_size; 2298 for (i = 0; i < serial->num_rx_urbs; i++) { 2299 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2300 if (!serial->rx_urb[i]) { 2301 dev_err(dev, "Could not allocate urb?\n"); 2302 goto exit; 2303 } 2304 serial->rx_urb[i]->transfer_buffer = NULL; 2305 serial->rx_urb[i]->transfer_buffer_length = 0; 2306 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2307 GFP_KERNEL); 2308 if (!serial->rx_data[i]) 2309 goto exit; 2310 } 2311 2312 /* TX, allocate urb and initialize */ 2313 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2314 if (!serial->tx_urb) { 2315 dev_err(dev, "Could not allocate urb?\n"); 2316 goto exit; 2317 } 2318 serial->tx_urb->transfer_buffer = NULL; 2319 serial->tx_urb->transfer_buffer_length = 0; 2320 /* prepare our TX buffer */ 2321 serial->tx_data_count = 0; 2322 serial->tx_buffer_count = 0; 2323 serial->tx_data_length = tx_size; 2324 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2325 if (!serial->tx_data) 2326 goto exit; 2327 2328 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2329 if (!serial->tx_buffer) 2330 goto exit; 2331 2332 return 0; 2333 exit: 2334 hso_serial_common_free(serial); 2335 return -1; 2336 } 2337 2338 /* Creates a general hso device */ 2339 static struct hso_device *hso_create_device(struct usb_interface *intf, 2340 int port_spec) 2341 { 2342 struct hso_device *hso_dev; 2343 2344 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2345 if (!hso_dev) 2346 return NULL; 2347 2348 hso_dev->port_spec = port_spec; 2349 hso_dev->usb = interface_to_usbdev(intf); 2350 hso_dev->interface = intf; 2351 kref_init(&hso_dev->ref); 2352 mutex_init(&hso_dev->mutex); 2353 2354 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2355 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2356 INIT_WORK(&hso_dev->reset_device, reset_device); 2357 2358 return hso_dev; 2359 } 2360 2361 /* Removes a network device in the network device table */ 2362 static int remove_net_device(struct hso_device *hso_dev) 2363 { 2364 int i; 2365 2366 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2367 if (network_table[i] == hso_dev) { 2368 network_table[i] = NULL; 2369 break; 2370 } 2371 } 2372 if (i == HSO_MAX_NET_DEVICES) 2373 return -1; 2374 return 0; 2375 } 2376 2377 /* Frees our network device */ 2378 static void hso_free_net_device(struct hso_device *hso_dev) 2379 { 2380 int i; 2381 struct hso_net *hso_net = dev2net(hso_dev); 2382 2383 if (!hso_net) 2384 return; 2385 2386 remove_net_device(hso_net->parent); 2387 2388 if (hso_net->net) 2389 unregister_netdev(hso_net->net); 2390 2391 /* start freeing */ 2392 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2393 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2394 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2395 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2396 } 2397 usb_free_urb(hso_net->mux_bulk_tx_urb); 2398 kfree(hso_net->mux_bulk_tx_buf); 2399 hso_net->mux_bulk_tx_buf = NULL; 2400 2401 if (hso_net->net) 2402 free_netdev(hso_net->net); 2403 2404 kfree(hso_dev); 2405 } 2406 2407 static const struct net_device_ops hso_netdev_ops = { 2408 .ndo_open = hso_net_open, 2409 .ndo_stop = hso_net_close, 2410 .ndo_start_xmit = hso_net_start_xmit, 2411 .ndo_tx_timeout = hso_net_tx_timeout, 2412 }; 2413 2414 /* initialize the network interface */ 2415 static void hso_net_init(struct net_device *net) 2416 { 2417 struct hso_net *hso_net = netdev_priv(net); 2418 2419 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2420 2421 /* fill in the other fields */ 2422 net->netdev_ops = &hso_netdev_ops; 2423 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2424 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2425 net->type = ARPHRD_NONE; 2426 net->mtu = DEFAULT_MTU - 14; 2427 net->tx_queue_len = 10; 2428 SET_ETHTOOL_OPS(net, &ops); 2429 2430 /* and initialize the semaphore */ 2431 spin_lock_init(&hso_net->net_lock); 2432 } 2433 2434 /* Adds a network device in the network device table */ 2435 static int add_net_device(struct hso_device *hso_dev) 2436 { 2437 int i; 2438 2439 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2440 if (network_table[i] == NULL) { 2441 network_table[i] = hso_dev; 2442 break; 2443 } 2444 } 2445 if (i == HSO_MAX_NET_DEVICES) 2446 return -1; 2447 return 0; 2448 } 2449 2450 static int hso_rfkill_set_block(void *data, bool blocked) 2451 { 2452 struct hso_device *hso_dev = data; 2453 int enabled = !blocked; 2454 int rv; 2455 2456 mutex_lock(&hso_dev->mutex); 2457 if (hso_dev->usb_gone) 2458 rv = 0; 2459 else 2460 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2461 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2462 USB_CTRL_SET_TIMEOUT); 2463 mutex_unlock(&hso_dev->mutex); 2464 return rv; 2465 } 2466 2467 static const struct rfkill_ops hso_rfkill_ops = { 2468 .set_block = hso_rfkill_set_block, 2469 }; 2470 2471 /* Creates and sets up everything for rfkill */ 2472 static void hso_create_rfkill(struct hso_device *hso_dev, 2473 struct usb_interface *interface) 2474 { 2475 struct hso_net *hso_net = dev2net(hso_dev); 2476 struct device *dev = &hso_net->net->dev; 2477 char *rfkn; 2478 2479 rfkn = kzalloc(20, GFP_KERNEL); 2480 if (!rfkn) 2481 dev_err(dev, "%s - Out of memory\n", __func__); 2482 2483 snprintf(rfkn, 20, "hso-%d", 2484 interface->altsetting->desc.bInterfaceNumber); 2485 2486 hso_net->rfkill = rfkill_alloc(rfkn, 2487 &interface_to_usbdev(interface)->dev, 2488 RFKILL_TYPE_WWAN, 2489 &hso_rfkill_ops, hso_dev); 2490 if (!hso_net->rfkill) { 2491 dev_err(dev, "%s - Out of memory\n", __func__); 2492 kfree(rfkn); 2493 return; 2494 } 2495 if (rfkill_register(hso_net->rfkill) < 0) { 2496 rfkill_destroy(hso_net->rfkill); 2497 kfree(rfkn); 2498 hso_net->rfkill = NULL; 2499 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2500 return; 2501 } 2502 } 2503 2504 static struct device_type hso_type = { 2505 .name = "wwan", 2506 }; 2507 2508 /* Creates our network device */ 2509 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2510 int port_spec) 2511 { 2512 int result, i; 2513 struct net_device *net; 2514 struct hso_net *hso_net; 2515 struct hso_device *hso_dev; 2516 2517 hso_dev = hso_create_device(interface, port_spec); 2518 if (!hso_dev) 2519 return NULL; 2520 2521 /* allocate our network device, then we can put in our private data */ 2522 /* call hso_net_init to do the basic initialization */ 2523 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2524 if (!net) { 2525 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2526 goto exit; 2527 } 2528 2529 hso_net = netdev_priv(net); 2530 2531 hso_dev->port_data.dev_net = hso_net; 2532 hso_net->net = net; 2533 hso_net->parent = hso_dev; 2534 2535 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2536 USB_DIR_IN); 2537 if (!hso_net->in_endp) { 2538 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2539 goto exit; 2540 } 2541 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2542 USB_DIR_OUT); 2543 if (!hso_net->out_endp) { 2544 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2545 goto exit; 2546 } 2547 SET_NETDEV_DEV(net, &interface->dev); 2548 SET_NETDEV_DEVTYPE(net, &hso_type); 2549 2550 /* registering our net device */ 2551 result = register_netdev(net); 2552 if (result) { 2553 dev_err(&interface->dev, "Failed to register device\n"); 2554 goto exit; 2555 } 2556 2557 /* start allocating */ 2558 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2559 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2560 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2561 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2562 goto exit; 2563 } 2564 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2565 GFP_KERNEL); 2566 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2567 goto exit; 2568 } 2569 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2570 if (!hso_net->mux_bulk_tx_urb) { 2571 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2572 goto exit; 2573 } 2574 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2575 if (!hso_net->mux_bulk_tx_buf) 2576 goto exit; 2577 2578 add_net_device(hso_dev); 2579 2580 hso_log_port(hso_dev); 2581 2582 hso_create_rfkill(hso_dev, interface); 2583 2584 return hso_dev; 2585 exit: 2586 hso_free_net_device(hso_dev); 2587 return NULL; 2588 } 2589 2590 static void hso_free_tiomget(struct hso_serial *serial) 2591 { 2592 struct hso_tiocmget *tiocmget; 2593 if (!serial) 2594 return; 2595 tiocmget = serial->tiocmget; 2596 if (tiocmget) { 2597 usb_free_urb(tiocmget->urb); 2598 tiocmget->urb = NULL; 2599 serial->tiocmget = NULL; 2600 kfree(tiocmget); 2601 } 2602 } 2603 2604 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2605 static void hso_free_serial_device(struct hso_device *hso_dev) 2606 { 2607 struct hso_serial *serial = dev2ser(hso_dev); 2608 2609 if (!serial) 2610 return; 2611 set_serial_by_index(serial->minor, NULL); 2612 2613 hso_serial_common_free(serial); 2614 2615 if (serial->shared_int) { 2616 mutex_lock(&serial->shared_int->shared_int_lock); 2617 if (--serial->shared_int->ref_count == 0) 2618 hso_free_shared_int(serial->shared_int); 2619 else 2620 mutex_unlock(&serial->shared_int->shared_int_lock); 2621 } 2622 hso_free_tiomget(serial); 2623 kfree(serial); 2624 kfree(hso_dev); 2625 } 2626 2627 /* Creates a bulk AT channel */ 2628 static struct hso_device *hso_create_bulk_serial_device( 2629 struct usb_interface *interface, int port) 2630 { 2631 struct hso_device *hso_dev; 2632 struct hso_serial *serial; 2633 int num_urbs; 2634 struct hso_tiocmget *tiocmget; 2635 2636 hso_dev = hso_create_device(interface, port); 2637 if (!hso_dev) 2638 return NULL; 2639 2640 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2641 if (!serial) 2642 goto exit; 2643 2644 serial->parent = hso_dev; 2645 hso_dev->port_data.dev_serial = serial; 2646 2647 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2648 num_urbs = 2; 2649 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2650 GFP_KERNEL); 2651 /* it isn't going to break our heart if serial->tiocmget 2652 * allocation fails don't bother checking this. 2653 */ 2654 if (serial->tiocmget) { 2655 tiocmget = serial->tiocmget; 2656 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2657 if (tiocmget->urb) { 2658 mutex_init(&tiocmget->mutex); 2659 init_waitqueue_head(&tiocmget->waitq); 2660 tiocmget->endp = hso_get_ep( 2661 interface, 2662 USB_ENDPOINT_XFER_INT, 2663 USB_DIR_IN); 2664 } else 2665 hso_free_tiomget(serial); 2666 } 2667 } 2668 else 2669 num_urbs = 1; 2670 2671 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2672 BULK_URB_TX_SIZE)) 2673 goto exit; 2674 2675 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2676 USB_DIR_IN); 2677 if (!serial->in_endp) { 2678 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2679 goto exit2; 2680 } 2681 2682 if (! 2683 (serial->out_endp = 2684 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2685 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2686 goto exit2; 2687 } 2688 2689 serial->write_data = hso_std_serial_write_data; 2690 2691 /* and record this serial */ 2692 set_serial_by_index(serial->minor, serial); 2693 2694 /* setup the proc dirs and files if needed */ 2695 hso_log_port(hso_dev); 2696 2697 /* done, return it */ 2698 return hso_dev; 2699 2700 exit2: 2701 hso_serial_common_free(serial); 2702 exit: 2703 hso_free_tiomget(serial); 2704 kfree(serial); 2705 kfree(hso_dev); 2706 return NULL; 2707 } 2708 2709 /* Creates a multiplexed AT channel */ 2710 static 2711 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2712 int port, 2713 struct hso_shared_int *mux) 2714 { 2715 struct hso_device *hso_dev; 2716 struct hso_serial *serial; 2717 int port_spec; 2718 2719 port_spec = HSO_INTF_MUX; 2720 port_spec &= ~HSO_PORT_MASK; 2721 2722 port_spec |= hso_mux_to_port(port); 2723 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2724 return NULL; 2725 2726 hso_dev = hso_create_device(interface, port_spec); 2727 if (!hso_dev) 2728 return NULL; 2729 2730 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2731 if (!serial) 2732 goto exit; 2733 2734 hso_dev->port_data.dev_serial = serial; 2735 serial->parent = hso_dev; 2736 2737 if (hso_serial_common_create 2738 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2739 goto exit; 2740 2741 serial->tx_data_length--; 2742 serial->write_data = hso_mux_serial_write_data; 2743 2744 serial->shared_int = mux; 2745 mutex_lock(&serial->shared_int->shared_int_lock); 2746 serial->shared_int->ref_count++; 2747 mutex_unlock(&serial->shared_int->shared_int_lock); 2748 2749 /* and record this serial */ 2750 set_serial_by_index(serial->minor, serial); 2751 2752 /* setup the proc dirs and files if needed */ 2753 hso_log_port(hso_dev); 2754 2755 /* done, return it */ 2756 return hso_dev; 2757 2758 exit: 2759 if (serial) { 2760 tty_unregister_device(tty_drv, serial->minor); 2761 kfree(serial); 2762 } 2763 if (hso_dev) 2764 kfree(hso_dev); 2765 return NULL; 2766 2767 } 2768 2769 static void hso_free_shared_int(struct hso_shared_int *mux) 2770 { 2771 usb_free_urb(mux->shared_intr_urb); 2772 kfree(mux->shared_intr_buf); 2773 mutex_unlock(&mux->shared_int_lock); 2774 kfree(mux); 2775 } 2776 2777 static 2778 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2779 { 2780 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2781 2782 if (!mux) 2783 return NULL; 2784 2785 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2786 USB_DIR_IN); 2787 if (!mux->intr_endp) { 2788 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2789 goto exit; 2790 } 2791 2792 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2793 if (!mux->shared_intr_urb) { 2794 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2795 goto exit; 2796 } 2797 mux->shared_intr_buf = 2798 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2799 GFP_KERNEL); 2800 if (!mux->shared_intr_buf) 2801 goto exit; 2802 2803 mutex_init(&mux->shared_int_lock); 2804 2805 return mux; 2806 2807 exit: 2808 kfree(mux->shared_intr_buf); 2809 usb_free_urb(mux->shared_intr_urb); 2810 kfree(mux); 2811 return NULL; 2812 } 2813 2814 /* Gets the port spec for a certain interface */ 2815 static int hso_get_config_data(struct usb_interface *interface) 2816 { 2817 struct usb_device *usbdev = interface_to_usbdev(interface); 2818 u8 *config_data = kmalloc(17, GFP_KERNEL); 2819 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2820 s32 result; 2821 2822 if (!config_data) 2823 return -ENOMEM; 2824 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2825 0x86, 0xC0, 0, 0, config_data, 17, 2826 USB_CTRL_SET_TIMEOUT) != 0x11) { 2827 kfree(config_data); 2828 return -EIO; 2829 } 2830 2831 switch (config_data[if_num]) { 2832 case 0x0: 2833 result = 0; 2834 break; 2835 case 0x1: 2836 result = HSO_PORT_DIAG; 2837 break; 2838 case 0x2: 2839 result = HSO_PORT_GPS; 2840 break; 2841 case 0x3: 2842 result = HSO_PORT_GPS_CONTROL; 2843 break; 2844 case 0x4: 2845 result = HSO_PORT_APP; 2846 break; 2847 case 0x5: 2848 result = HSO_PORT_APP2; 2849 break; 2850 case 0x6: 2851 result = HSO_PORT_CONTROL; 2852 break; 2853 case 0x7: 2854 result = HSO_PORT_NETWORK; 2855 break; 2856 case 0x8: 2857 result = HSO_PORT_MODEM; 2858 break; 2859 case 0x9: 2860 result = HSO_PORT_MSD; 2861 break; 2862 case 0xa: 2863 result = HSO_PORT_PCSC; 2864 break; 2865 case 0xb: 2866 result = HSO_PORT_VOICE; 2867 break; 2868 default: 2869 result = 0; 2870 } 2871 2872 if (result) 2873 result |= HSO_INTF_BULK; 2874 2875 if (config_data[16] & 0x1) 2876 result |= HSO_INFO_CRC_BUG; 2877 2878 kfree(config_data); 2879 return result; 2880 } 2881 2882 /* called once for each interface upon device insertion */ 2883 static int hso_probe(struct usb_interface *interface, 2884 const struct usb_device_id *id) 2885 { 2886 int mux, i, if_num, port_spec; 2887 unsigned char port_mask; 2888 struct hso_device *hso_dev = NULL; 2889 struct hso_shared_int *shared_int; 2890 struct hso_device *tmp_dev = NULL; 2891 2892 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2893 dev_err(&interface->dev, "Not our interface\n"); 2894 return -ENODEV; 2895 } 2896 2897 if_num = interface->altsetting->desc.bInterfaceNumber; 2898 2899 /* Get the interface/port specification from either driver_info or from 2900 * the device itself */ 2901 if (id->driver_info) 2902 port_spec = ((u32 *)(id->driver_info))[if_num]; 2903 else 2904 port_spec = hso_get_config_data(interface); 2905 2906 /* Check if we need to switch to alt interfaces prior to port 2907 * configuration */ 2908 if (interface->num_altsetting > 1) 2909 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2910 interface->needs_remote_wakeup = 1; 2911 2912 /* Allocate new hso device(s) */ 2913 switch (port_spec & HSO_INTF_MASK) { 2914 case HSO_INTF_MUX: 2915 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2916 /* Create the network device */ 2917 if (!disable_net) { 2918 hso_dev = hso_create_net_device(interface, 2919 port_spec); 2920 if (!hso_dev) 2921 goto exit; 2922 tmp_dev = hso_dev; 2923 } 2924 } 2925 2926 if (hso_get_mux_ports(interface, &port_mask)) 2927 /* TODO: de-allocate everything */ 2928 goto exit; 2929 2930 shared_int = hso_create_shared_int(interface); 2931 if (!shared_int) 2932 goto exit; 2933 2934 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2935 if (port_mask & i) { 2936 hso_dev = hso_create_mux_serial_device( 2937 interface, i, shared_int); 2938 if (!hso_dev) 2939 goto exit; 2940 } 2941 } 2942 2943 if (tmp_dev) 2944 hso_dev = tmp_dev; 2945 break; 2946 2947 case HSO_INTF_BULK: 2948 /* It's a regular bulk interface */ 2949 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2950 if (!disable_net) 2951 hso_dev = 2952 hso_create_net_device(interface, port_spec); 2953 } else { 2954 hso_dev = 2955 hso_create_bulk_serial_device(interface, port_spec); 2956 } 2957 if (!hso_dev) 2958 goto exit; 2959 break; 2960 default: 2961 goto exit; 2962 } 2963 2964 /* save our data pointer in this device */ 2965 usb_set_intfdata(interface, hso_dev); 2966 2967 /* done */ 2968 return 0; 2969 exit: 2970 hso_free_interface(interface); 2971 return -ENODEV; 2972 } 2973 2974 /* device removed, cleaning up */ 2975 static void hso_disconnect(struct usb_interface *interface) 2976 { 2977 hso_free_interface(interface); 2978 2979 /* remove reference of our private data */ 2980 usb_set_intfdata(interface, NULL); 2981 } 2982 2983 static void async_get_intf(struct work_struct *data) 2984 { 2985 struct hso_device *hso_dev = 2986 container_of(data, struct hso_device, async_get_intf); 2987 usb_autopm_get_interface(hso_dev->interface); 2988 } 2989 2990 static void async_put_intf(struct work_struct *data) 2991 { 2992 struct hso_device *hso_dev = 2993 container_of(data, struct hso_device, async_put_intf); 2994 usb_autopm_put_interface(hso_dev->interface); 2995 } 2996 2997 static int hso_get_activity(struct hso_device *hso_dev) 2998 { 2999 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3000 if (!hso_dev->is_active) { 3001 hso_dev->is_active = 1; 3002 schedule_work(&hso_dev->async_get_intf); 3003 } 3004 } 3005 3006 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3007 return -EAGAIN; 3008 3009 usb_mark_last_busy(hso_dev->usb); 3010 3011 return 0; 3012 } 3013 3014 static int hso_put_activity(struct hso_device *hso_dev) 3015 { 3016 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3017 if (hso_dev->is_active) { 3018 hso_dev->is_active = 0; 3019 schedule_work(&hso_dev->async_put_intf); 3020 return -EAGAIN; 3021 } 3022 } 3023 hso_dev->is_active = 0; 3024 return 0; 3025 } 3026 3027 /* called by kernel when we need to suspend device */ 3028 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3029 { 3030 int i, result; 3031 3032 /* Stop all serial ports */ 3033 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3034 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3035 result = hso_stop_serial_device(serial_table[i]); 3036 if (result) 3037 goto out; 3038 } 3039 } 3040 3041 /* Stop all network ports */ 3042 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3043 if (network_table[i] && 3044 (network_table[i]->interface == iface)) { 3045 result = hso_stop_net_device(network_table[i]); 3046 if (result) 3047 goto out; 3048 } 3049 } 3050 3051 out: 3052 return 0; 3053 } 3054 3055 /* called by kernel when we need to resume device */ 3056 static int hso_resume(struct usb_interface *iface) 3057 { 3058 int i, result = 0; 3059 struct hso_net *hso_net; 3060 3061 /* Start all serial ports */ 3062 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3063 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3064 if (dev2ser(serial_table[i])->port.count) { 3065 result = 3066 hso_start_serial_device(serial_table[i], GFP_NOIO); 3067 hso_kick_transmit(dev2ser(serial_table[i])); 3068 if (result) 3069 goto out; 3070 } 3071 } 3072 } 3073 3074 /* Start all network ports */ 3075 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3076 if (network_table[i] && 3077 (network_table[i]->interface == iface)) { 3078 hso_net = dev2net(network_table[i]); 3079 if (hso_net->flags & IFF_UP) { 3080 /* First transmit any lingering data, 3081 then restart the device. */ 3082 if (hso_net->skb_tx_buf) { 3083 dev_dbg(&iface->dev, 3084 "Transmitting" 3085 " lingering data\n"); 3086 hso_net_start_xmit(hso_net->skb_tx_buf, 3087 hso_net->net); 3088 hso_net->skb_tx_buf = NULL; 3089 } 3090 result = hso_start_net_device(network_table[i]); 3091 if (result) 3092 goto out; 3093 } 3094 } 3095 } 3096 3097 out: 3098 return result; 3099 } 3100 3101 static void reset_device(struct work_struct *data) 3102 { 3103 struct hso_device *hso_dev = 3104 container_of(data, struct hso_device, reset_device); 3105 struct usb_device *usb = hso_dev->usb; 3106 int result; 3107 3108 if (hso_dev->usb_gone) { 3109 D1("No reset during disconnect\n"); 3110 } else { 3111 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3112 if (result < 0) 3113 D1("unable to lock device for reset: %d\n", result); 3114 else { 3115 usb_reset_device(usb); 3116 usb_unlock_device(usb); 3117 } 3118 } 3119 } 3120 3121 static void hso_serial_ref_free(struct kref *ref) 3122 { 3123 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3124 3125 hso_free_serial_device(hso_dev); 3126 } 3127 3128 static void hso_free_interface(struct usb_interface *interface) 3129 { 3130 struct hso_serial *hso_dev; 3131 int i; 3132 3133 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3134 if (serial_table[i] && 3135 (serial_table[i]->interface == interface)) { 3136 hso_dev = dev2ser(serial_table[i]); 3137 tty_port_tty_hangup(&hso_dev->port, false); 3138 mutex_lock(&hso_dev->parent->mutex); 3139 hso_dev->parent->usb_gone = 1; 3140 mutex_unlock(&hso_dev->parent->mutex); 3141 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3142 } 3143 } 3144 3145 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3146 if (network_table[i] && 3147 (network_table[i]->interface == interface)) { 3148 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3149 /* hso_stop_net_device doesn't stop the net queue since 3150 * traffic needs to start it again when suspended */ 3151 netif_stop_queue(dev2net(network_table[i])->net); 3152 hso_stop_net_device(network_table[i]); 3153 cancel_work_sync(&network_table[i]->async_put_intf); 3154 cancel_work_sync(&network_table[i]->async_get_intf); 3155 if (rfk) { 3156 rfkill_unregister(rfk); 3157 rfkill_destroy(rfk); 3158 } 3159 hso_free_net_device(network_table[i]); 3160 } 3161 } 3162 } 3163 3164 /* Helper functions */ 3165 3166 /* Get the endpoint ! */ 3167 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3168 int type, int dir) 3169 { 3170 int i; 3171 struct usb_host_interface *iface = intf->cur_altsetting; 3172 struct usb_endpoint_descriptor *endp; 3173 3174 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3175 endp = &iface->endpoint[i].desc; 3176 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3177 (usb_endpoint_type(endp) == type)) 3178 return endp; 3179 } 3180 3181 return NULL; 3182 } 3183 3184 /* Get the byte that describes which ports are enabled */ 3185 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3186 { 3187 int i; 3188 struct usb_host_interface *iface = intf->cur_altsetting; 3189 3190 if (iface->extralen == 3) { 3191 *ports = iface->extra[2]; 3192 return 0; 3193 } 3194 3195 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3196 if (iface->endpoint[i].extralen == 3) { 3197 *ports = iface->endpoint[i].extra[2]; 3198 return 0; 3199 } 3200 } 3201 3202 return -1; 3203 } 3204 3205 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3206 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3207 struct usb_device *usb, gfp_t gfp) 3208 { 3209 int result; 3210 3211 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3212 usb_rcvintpipe(usb, 3213 shared_int->intr_endp->bEndpointAddress & 0x7F), 3214 shared_int->shared_intr_buf, 3215 1, 3216 intr_callback, shared_int, 3217 shared_int->intr_endp->bInterval); 3218 3219 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3220 if (result) 3221 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3222 result); 3223 3224 return result; 3225 } 3226 3227 /* operations setup of the serial interface */ 3228 static const struct tty_operations hso_serial_ops = { 3229 .open = hso_serial_open, 3230 .close = hso_serial_close, 3231 .write = hso_serial_write, 3232 .write_room = hso_serial_write_room, 3233 .ioctl = hso_serial_ioctl, 3234 .set_termios = hso_serial_set_termios, 3235 .chars_in_buffer = hso_serial_chars_in_buffer, 3236 .tiocmget = hso_serial_tiocmget, 3237 .tiocmset = hso_serial_tiocmset, 3238 .get_icount = hso_get_count, 3239 .unthrottle = hso_unthrottle 3240 }; 3241 3242 static struct usb_driver hso_driver = { 3243 .name = driver_name, 3244 .probe = hso_probe, 3245 .disconnect = hso_disconnect, 3246 .id_table = hso_ids, 3247 .suspend = hso_suspend, 3248 .resume = hso_resume, 3249 .reset_resume = hso_resume, 3250 .supports_autosuspend = 1, 3251 .disable_hub_initiated_lpm = 1, 3252 }; 3253 3254 static int __init hso_init(void) 3255 { 3256 int i; 3257 int result; 3258 3259 /* put it in the log */ 3260 printk(KERN_INFO "hso: %s\n", version); 3261 3262 /* Initialise the serial table semaphore and table */ 3263 spin_lock_init(&serial_table_lock); 3264 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3265 serial_table[i] = NULL; 3266 3267 /* allocate our driver using the proper amount of supported minors */ 3268 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3269 if (!tty_drv) 3270 return -ENOMEM; 3271 3272 /* fill in all needed values */ 3273 tty_drv->driver_name = driver_name; 3274 tty_drv->name = tty_filename; 3275 3276 /* if major number is provided as parameter, use that one */ 3277 if (tty_major) 3278 tty_drv->major = tty_major; 3279 3280 tty_drv->minor_start = 0; 3281 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3282 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3283 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3284 tty_drv->init_termios = tty_std_termios; 3285 hso_init_termios(&tty_drv->init_termios); 3286 tty_set_operations(tty_drv, &hso_serial_ops); 3287 3288 /* register the tty driver */ 3289 result = tty_register_driver(tty_drv); 3290 if (result) { 3291 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3292 __func__, result); 3293 goto err_free_tty; 3294 } 3295 3296 /* register this module as an usb driver */ 3297 result = usb_register(&hso_driver); 3298 if (result) { 3299 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3300 result); 3301 goto err_unreg_tty; 3302 } 3303 3304 /* done */ 3305 return 0; 3306 err_unreg_tty: 3307 tty_unregister_driver(tty_drv); 3308 err_free_tty: 3309 put_tty_driver(tty_drv); 3310 return result; 3311 } 3312 3313 static void __exit hso_exit(void) 3314 { 3315 printk(KERN_INFO "hso: unloaded\n"); 3316 3317 tty_unregister_driver(tty_drv); 3318 put_tty_driver(tty_drv); 3319 /* deregister the usb driver */ 3320 usb_deregister(&hso_driver); 3321 } 3322 3323 /* Module definitions */ 3324 module_init(hso_init); 3325 module_exit(hso_exit); 3326 3327 MODULE_AUTHOR(MOD_AUTHOR); 3328 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3329 MODULE_LICENSE(MOD_LICENSE); 3330 3331 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3332 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3333 module_param(debug, int, S_IRUGO | S_IWUSR); 3334 3335 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3336 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3337 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3338 3339 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3340 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3341 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3342