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 u8 rx_urb_filled[MAX_RX_URBS]; 262 struct tasklet_struct unthrottle_tasklet; 263 }; 264 265 struct hso_device { 266 union { 267 struct hso_serial *dev_serial; 268 struct hso_net *dev_net; 269 } port_data; 270 271 u32 port_spec; 272 273 u8 is_active; 274 u8 usb_gone; 275 struct work_struct async_get_intf; 276 struct work_struct async_put_intf; 277 struct work_struct reset_device; 278 279 struct usb_device *usb; 280 struct usb_interface *interface; 281 282 struct device *dev; 283 struct kref ref; 284 struct mutex mutex; 285 }; 286 287 /* Type of interface */ 288 #define HSO_INTF_MASK 0xFF00 289 #define HSO_INTF_MUX 0x0100 290 #define HSO_INTF_BULK 0x0200 291 292 /* Type of port */ 293 #define HSO_PORT_MASK 0xFF 294 #define HSO_PORT_NO_PORT 0x0 295 #define HSO_PORT_CONTROL 0x1 296 #define HSO_PORT_APP 0x2 297 #define HSO_PORT_GPS 0x3 298 #define HSO_PORT_PCSC 0x4 299 #define HSO_PORT_APP2 0x5 300 #define HSO_PORT_GPS_CONTROL 0x6 301 #define HSO_PORT_MSD 0x7 302 #define HSO_PORT_VOICE 0x8 303 #define HSO_PORT_DIAG2 0x9 304 #define HSO_PORT_DIAG 0x10 305 #define HSO_PORT_MODEM 0x11 306 #define HSO_PORT_NETWORK 0x12 307 308 /* Additional device info */ 309 #define HSO_INFO_MASK 0xFF000000 310 #define HSO_INFO_CRC_BUG 0x01000000 311 312 /*****************************************************************************/ 313 /* Prototypes */ 314 /*****************************************************************************/ 315 /* Serial driver functions */ 316 static int hso_serial_tiocmset(struct tty_struct *tty, 317 unsigned int set, unsigned int clear); 318 static void ctrl_callback(struct urb *urb); 319 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 320 static void hso_kick_transmit(struct hso_serial *serial); 321 /* Helper functions */ 322 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 323 struct usb_device *usb, gfp_t gfp); 324 static void handle_usb_error(int status, const char *function, 325 struct hso_device *hso_dev); 326 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 327 int type, int dir); 328 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 329 static void hso_free_interface(struct usb_interface *intf); 330 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 331 static int hso_stop_serial_device(struct hso_device *hso_dev); 332 static int hso_start_net_device(struct hso_device *hso_dev); 333 static void hso_free_shared_int(struct hso_shared_int *shared_int); 334 static int hso_stop_net_device(struct hso_device *hso_dev); 335 static void hso_serial_ref_free(struct kref *ref); 336 static void hso_std_serial_read_bulk_callback(struct urb *urb); 337 static int hso_mux_serial_read(struct hso_serial *serial); 338 static void async_get_intf(struct work_struct *data); 339 static void async_put_intf(struct work_struct *data); 340 static int hso_put_activity(struct hso_device *hso_dev); 341 static int hso_get_activity(struct hso_device *hso_dev); 342 static void tiocmget_intr_callback(struct urb *urb); 343 static void reset_device(struct work_struct *data); 344 /*****************************************************************************/ 345 /* Helping functions */ 346 /*****************************************************************************/ 347 348 /* #define DEBUG */ 349 350 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 351 { 352 return hso_dev->port_data.dev_net; 353 } 354 355 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 356 { 357 return hso_dev->port_data.dev_serial; 358 } 359 360 /* Debugging functions */ 361 #ifdef DEBUG 362 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 363 unsigned int len) 364 { 365 static char name[255]; 366 367 sprintf(name, "hso[%d:%s]", line_count, func_name); 368 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 369 } 370 371 #define DUMP(buf_, len_) \ 372 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 373 374 #define DUMP1(buf_, len_) \ 375 do { \ 376 if (0x01 & debug) \ 377 DUMP(buf_, len_); \ 378 } while (0) 379 #else 380 #define DUMP(buf_, len_) 381 #define DUMP1(buf_, len_) 382 #endif 383 384 /* module parameters */ 385 static int debug; 386 static int tty_major; 387 static int disable_net; 388 389 /* driver info */ 390 static const char driver_name[] = "hso"; 391 static const char tty_filename[] = "ttyHS"; 392 static const char *version = __FILE__ ": " MOD_AUTHOR; 393 /* the usb driver itself (registered in hso_init) */ 394 static struct usb_driver hso_driver; 395 /* serial structures */ 396 static struct tty_driver *tty_drv; 397 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 398 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 399 static spinlock_t serial_table_lock; 400 401 static const s32 default_port_spec[] = { 402 HSO_INTF_MUX | HSO_PORT_NETWORK, 403 HSO_INTF_BULK | HSO_PORT_DIAG, 404 HSO_INTF_BULK | HSO_PORT_MODEM, 405 0 406 }; 407 408 static const s32 icon321_port_spec[] = { 409 HSO_INTF_MUX | HSO_PORT_NETWORK, 410 HSO_INTF_BULK | HSO_PORT_DIAG2, 411 HSO_INTF_BULK | HSO_PORT_MODEM, 412 HSO_INTF_BULK | HSO_PORT_DIAG, 413 0 414 }; 415 416 #define default_port_device(vendor, product) \ 417 USB_DEVICE(vendor, product), \ 418 .driver_info = (kernel_ulong_t)default_port_spec 419 420 #define icon321_port_device(vendor, product) \ 421 USB_DEVICE(vendor, product), \ 422 .driver_info = (kernel_ulong_t)icon321_port_spec 423 424 /* list of devices we support */ 425 static const struct usb_device_id hso_ids[] = { 426 {default_port_device(0x0af0, 0x6711)}, 427 {default_port_device(0x0af0, 0x6731)}, 428 {default_port_device(0x0af0, 0x6751)}, 429 {default_port_device(0x0af0, 0x6771)}, 430 {default_port_device(0x0af0, 0x6791)}, 431 {default_port_device(0x0af0, 0x6811)}, 432 {default_port_device(0x0af0, 0x6911)}, 433 {default_port_device(0x0af0, 0x6951)}, 434 {default_port_device(0x0af0, 0x6971)}, 435 {default_port_device(0x0af0, 0x7011)}, 436 {default_port_device(0x0af0, 0x7031)}, 437 {default_port_device(0x0af0, 0x7051)}, 438 {default_port_device(0x0af0, 0x7071)}, 439 {default_port_device(0x0af0, 0x7111)}, 440 {default_port_device(0x0af0, 0x7211)}, 441 {default_port_device(0x0af0, 0x7251)}, 442 {default_port_device(0x0af0, 0x7271)}, 443 {default_port_device(0x0af0, 0x7311)}, 444 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 445 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 446 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 447 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 448 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 449 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 450 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 451 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 452 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 453 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 454 {USB_DEVICE(0x0af0, 0x7701)}, 455 {USB_DEVICE(0x0af0, 0x7706)}, 456 {USB_DEVICE(0x0af0, 0x7801)}, 457 {USB_DEVICE(0x0af0, 0x7901)}, 458 {USB_DEVICE(0x0af0, 0x7A01)}, 459 {USB_DEVICE(0x0af0, 0x7A05)}, 460 {USB_DEVICE(0x0af0, 0x8200)}, 461 {USB_DEVICE(0x0af0, 0x8201)}, 462 {USB_DEVICE(0x0af0, 0x8300)}, 463 {USB_DEVICE(0x0af0, 0x8302)}, 464 {USB_DEVICE(0x0af0, 0x8304)}, 465 {USB_DEVICE(0x0af0, 0x8400)}, 466 {USB_DEVICE(0x0af0, 0x8600)}, 467 {USB_DEVICE(0x0af0, 0x8800)}, 468 {USB_DEVICE(0x0af0, 0x8900)}, 469 {USB_DEVICE(0x0af0, 0x9000)}, 470 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 471 {USB_DEVICE(0x0af0, 0xd035)}, 472 {USB_DEVICE(0x0af0, 0xd055)}, 473 {USB_DEVICE(0x0af0, 0xd155)}, 474 {USB_DEVICE(0x0af0, 0xd255)}, 475 {USB_DEVICE(0x0af0, 0xd057)}, 476 {USB_DEVICE(0x0af0, 0xd157)}, 477 {USB_DEVICE(0x0af0, 0xd257)}, 478 {USB_DEVICE(0x0af0, 0xd357)}, 479 {USB_DEVICE(0x0af0, 0xd058)}, 480 {USB_DEVICE(0x0af0, 0xc100)}, 481 {} 482 }; 483 MODULE_DEVICE_TABLE(usb, hso_ids); 484 485 /* Sysfs attribute */ 486 static ssize_t hso_sysfs_show_porttype(struct device *dev, 487 struct device_attribute *attr, 488 char *buf) 489 { 490 struct hso_device *hso_dev = dev_get_drvdata(dev); 491 char *port_name; 492 493 if (!hso_dev) 494 return 0; 495 496 switch (hso_dev->port_spec & HSO_PORT_MASK) { 497 case HSO_PORT_CONTROL: 498 port_name = "Control"; 499 break; 500 case HSO_PORT_APP: 501 port_name = "Application"; 502 break; 503 case HSO_PORT_APP2: 504 port_name = "Application2"; 505 break; 506 case HSO_PORT_GPS: 507 port_name = "GPS"; 508 break; 509 case HSO_PORT_GPS_CONTROL: 510 port_name = "GPS Control"; 511 break; 512 case HSO_PORT_PCSC: 513 port_name = "PCSC"; 514 break; 515 case HSO_PORT_DIAG: 516 port_name = "Diagnostic"; 517 break; 518 case HSO_PORT_DIAG2: 519 port_name = "Diagnostic2"; 520 break; 521 case HSO_PORT_MODEM: 522 port_name = "Modem"; 523 break; 524 case HSO_PORT_NETWORK: 525 port_name = "Network"; 526 break; 527 default: 528 port_name = "Unknown"; 529 break; 530 } 531 532 return sprintf(buf, "%s\n", port_name); 533 } 534 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 535 536 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 537 { 538 int idx; 539 540 for (idx = 0; idx < serial->num_rx_urbs; idx++) 541 if (serial->rx_urb[idx] == urb) 542 return idx; 543 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 544 return -1; 545 } 546 547 /* converts mux value to a port spec value */ 548 static u32 hso_mux_to_port(int mux) 549 { 550 u32 result; 551 552 switch (mux) { 553 case 0x1: 554 result = HSO_PORT_CONTROL; 555 break; 556 case 0x2: 557 result = HSO_PORT_APP; 558 break; 559 case 0x4: 560 result = HSO_PORT_PCSC; 561 break; 562 case 0x8: 563 result = HSO_PORT_GPS; 564 break; 565 case 0x10: 566 result = HSO_PORT_APP2; 567 break; 568 default: 569 result = HSO_PORT_NO_PORT; 570 } 571 return result; 572 } 573 574 /* converts port spec value to a mux value */ 575 static u32 hso_port_to_mux(int port) 576 { 577 u32 result; 578 579 switch (port & HSO_PORT_MASK) { 580 case HSO_PORT_CONTROL: 581 result = 0x0; 582 break; 583 case HSO_PORT_APP: 584 result = 0x1; 585 break; 586 case HSO_PORT_PCSC: 587 result = 0x2; 588 break; 589 case HSO_PORT_GPS: 590 result = 0x3; 591 break; 592 case HSO_PORT_APP2: 593 result = 0x4; 594 break; 595 default: 596 result = 0x0; 597 } 598 return result; 599 } 600 601 static struct hso_serial *get_serial_by_shared_int_and_type( 602 struct hso_shared_int *shared_int, 603 int mux) 604 { 605 int i, port; 606 607 port = hso_mux_to_port(mux); 608 609 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 610 if (serial_table[i] && 611 (dev2ser(serial_table[i])->shared_int == shared_int) && 612 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 613 return dev2ser(serial_table[i]); 614 } 615 } 616 617 return NULL; 618 } 619 620 static struct hso_serial *get_serial_by_index(unsigned index) 621 { 622 struct hso_serial *serial = NULL; 623 unsigned long flags; 624 625 spin_lock_irqsave(&serial_table_lock, flags); 626 if (serial_table[index]) 627 serial = dev2ser(serial_table[index]); 628 spin_unlock_irqrestore(&serial_table_lock, flags); 629 630 return serial; 631 } 632 633 static int get_free_serial_index(void) 634 { 635 int index; 636 unsigned long flags; 637 638 spin_lock_irqsave(&serial_table_lock, flags); 639 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 640 if (serial_table[index] == NULL) { 641 spin_unlock_irqrestore(&serial_table_lock, flags); 642 return index; 643 } 644 } 645 spin_unlock_irqrestore(&serial_table_lock, flags); 646 647 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 648 return -1; 649 } 650 651 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 652 { 653 unsigned long flags; 654 655 spin_lock_irqsave(&serial_table_lock, flags); 656 if (serial) 657 serial_table[index] = serial->parent; 658 else 659 serial_table[index] = NULL; 660 spin_unlock_irqrestore(&serial_table_lock, flags); 661 } 662 663 static void handle_usb_error(int status, const char *function, 664 struct hso_device *hso_dev) 665 { 666 char *explanation; 667 668 switch (status) { 669 case -ENODEV: 670 explanation = "no device"; 671 break; 672 case -ENOENT: 673 explanation = "endpoint not enabled"; 674 break; 675 case -EPIPE: 676 explanation = "endpoint stalled"; 677 break; 678 case -ENOSPC: 679 explanation = "not enough bandwidth"; 680 break; 681 case -ESHUTDOWN: 682 explanation = "device disabled"; 683 break; 684 case -EHOSTUNREACH: 685 explanation = "device suspended"; 686 break; 687 case -EINVAL: 688 case -EAGAIN: 689 case -EFBIG: 690 case -EMSGSIZE: 691 explanation = "internal error"; 692 break; 693 case -EILSEQ: 694 case -EPROTO: 695 case -ETIME: 696 case -ETIMEDOUT: 697 explanation = "protocol error"; 698 if (hso_dev) 699 schedule_work(&hso_dev->reset_device); 700 break; 701 default: 702 explanation = "unknown status"; 703 break; 704 } 705 706 /* log a meaningful explanation of an USB status */ 707 D1("%s: received USB status - %s (%d)", function, explanation, status); 708 } 709 710 /* Network interface functions */ 711 712 /* called when net interface is brought up by ifconfig */ 713 static int hso_net_open(struct net_device *net) 714 { 715 struct hso_net *odev = netdev_priv(net); 716 unsigned long flags = 0; 717 718 if (!odev) { 719 dev_err(&net->dev, "No net device !\n"); 720 return -ENODEV; 721 } 722 723 odev->skb_tx_buf = NULL; 724 725 /* setup environment */ 726 spin_lock_irqsave(&odev->net_lock, flags); 727 odev->rx_parse_state = WAIT_IP; 728 odev->rx_buf_size = 0; 729 odev->rx_buf_missing = sizeof(struct iphdr); 730 spin_unlock_irqrestore(&odev->net_lock, flags); 731 732 /* We are up and running. */ 733 set_bit(HSO_NET_RUNNING, &odev->flags); 734 hso_start_net_device(odev->parent); 735 736 /* Tell the kernel we are ready to start receiving from it */ 737 netif_start_queue(net); 738 739 return 0; 740 } 741 742 /* called when interface is brought down by ifconfig */ 743 static int hso_net_close(struct net_device *net) 744 { 745 struct hso_net *odev = netdev_priv(net); 746 747 /* we don't need the queue anymore */ 748 netif_stop_queue(net); 749 /* no longer running */ 750 clear_bit(HSO_NET_RUNNING, &odev->flags); 751 752 hso_stop_net_device(odev->parent); 753 754 /* done */ 755 return 0; 756 } 757 758 /* USB tells is xmit done, we should start the netqueue again */ 759 static void write_bulk_callback(struct urb *urb) 760 { 761 struct hso_net *odev = urb->context; 762 int status = urb->status; 763 764 /* Sanity check */ 765 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 766 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 767 return; 768 } 769 770 /* Do we still have a valid kernel network device? */ 771 if (!netif_device_present(odev->net)) { 772 dev_err(&urb->dev->dev, "%s: net device not present\n", 773 __func__); 774 return; 775 } 776 777 /* log status, but don't act on it, we don't need to resubmit anything 778 * anyhow */ 779 if (status) 780 handle_usb_error(status, __func__, odev->parent); 781 782 hso_put_activity(odev->parent); 783 784 /* Tell the network interface we are ready for another frame */ 785 netif_wake_queue(odev->net); 786 } 787 788 /* called by kernel when we need to transmit a packet */ 789 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 790 struct net_device *net) 791 { 792 struct hso_net *odev = netdev_priv(net); 793 int result; 794 795 /* Tell the kernel, "No more frames 'til we are done with this one." */ 796 netif_stop_queue(net); 797 if (hso_get_activity(odev->parent) == -EAGAIN) { 798 odev->skb_tx_buf = skb; 799 return NETDEV_TX_OK; 800 } 801 802 /* log if asked */ 803 DUMP1(skb->data, skb->len); 804 /* Copy it from kernel memory to OUR memory */ 805 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 806 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 807 808 /* Fill in the URB for shipping it out. */ 809 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 810 odev->parent->usb, 811 usb_sndbulkpipe(odev->parent->usb, 812 odev->out_endp-> 813 bEndpointAddress & 0x7F), 814 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 815 odev); 816 817 /* Deal with the Zero Length packet problem, I hope */ 818 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 819 820 /* Send the URB on its merry way. */ 821 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 822 if (result) { 823 dev_warn(&odev->parent->interface->dev, 824 "failed mux_bulk_tx_urb %d\n", result); 825 net->stats.tx_errors++; 826 netif_start_queue(net); 827 } else { 828 net->stats.tx_packets++; 829 net->stats.tx_bytes += skb->len; 830 } 831 dev_kfree_skb(skb); 832 /* we're done */ 833 return NETDEV_TX_OK; 834 } 835 836 static const struct ethtool_ops ops = { 837 .get_link = ethtool_op_get_link 838 }; 839 840 /* called when a packet did not ack after watchdogtimeout */ 841 static void hso_net_tx_timeout(struct net_device *net) 842 { 843 struct hso_net *odev = netdev_priv(net); 844 845 if (!odev) 846 return; 847 848 /* Tell syslog we are hosed. */ 849 dev_warn(&net->dev, "Tx timed out.\n"); 850 851 /* Tear the waiting frame off the list */ 852 if (odev->mux_bulk_tx_urb && 853 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 854 usb_unlink_urb(odev->mux_bulk_tx_urb); 855 856 /* Update statistics */ 857 net->stats.tx_errors++; 858 } 859 860 /* make a real packet from the received USB buffer */ 861 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 862 unsigned int count, unsigned char is_eop) 863 { 864 unsigned short temp_bytes; 865 unsigned short buffer_offset = 0; 866 unsigned short frame_len; 867 unsigned char *tmp_rx_buf; 868 869 /* log if needed */ 870 D1("Rx %d bytes", count); 871 DUMP(ip_pkt, min(128, (int)count)); 872 873 while (count) { 874 switch (odev->rx_parse_state) { 875 case WAIT_IP: 876 /* waiting for IP header. */ 877 /* wanted bytes - size of ip header */ 878 temp_bytes = 879 (count < 880 odev->rx_buf_missing) ? count : odev-> 881 rx_buf_missing; 882 883 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 884 odev->rx_buf_size, ip_pkt + buffer_offset, 885 temp_bytes); 886 887 odev->rx_buf_size += temp_bytes; 888 buffer_offset += temp_bytes; 889 odev->rx_buf_missing -= temp_bytes; 890 count -= temp_bytes; 891 892 if (!odev->rx_buf_missing) { 893 /* header is complete allocate an sk_buffer and 894 * continue to WAIT_DATA */ 895 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 896 897 if ((frame_len > DEFAULT_MRU) || 898 (frame_len < sizeof(struct iphdr))) { 899 dev_err(&odev->net->dev, 900 "Invalid frame (%d) length\n", 901 frame_len); 902 odev->rx_parse_state = WAIT_SYNC; 903 continue; 904 } 905 /* Allocate an sk_buff */ 906 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 907 frame_len); 908 if (!odev->skb_rx_buf) { 909 /* We got no receive buffer. */ 910 D1("could not allocate memory"); 911 odev->rx_parse_state = WAIT_SYNC; 912 return; 913 } 914 915 /* Copy what we got so far. make room for iphdr 916 * after tail. */ 917 tmp_rx_buf = 918 skb_put(odev->skb_rx_buf, 919 sizeof(struct iphdr)); 920 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 921 sizeof(struct iphdr)); 922 923 /* ETH_HLEN */ 924 odev->rx_buf_size = sizeof(struct iphdr); 925 926 /* Filip actually use .tot_len */ 927 odev->rx_buf_missing = 928 frame_len - sizeof(struct iphdr); 929 odev->rx_parse_state = WAIT_DATA; 930 } 931 break; 932 933 case WAIT_DATA: 934 temp_bytes = (count < odev->rx_buf_missing) 935 ? count : odev->rx_buf_missing; 936 937 /* Copy the rest of the bytes that are left in the 938 * buffer into the waiting sk_buf. */ 939 /* Make room for temp_bytes after tail. */ 940 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 941 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 942 943 odev->rx_buf_missing -= temp_bytes; 944 count -= temp_bytes; 945 buffer_offset += temp_bytes; 946 odev->rx_buf_size += temp_bytes; 947 if (!odev->rx_buf_missing) { 948 /* Packet is complete. Inject into stack. */ 949 /* We have IP packet here */ 950 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 951 skb_reset_mac_header(odev->skb_rx_buf); 952 953 /* Ship it off to the kernel */ 954 netif_rx(odev->skb_rx_buf); 955 /* No longer our buffer. */ 956 odev->skb_rx_buf = NULL; 957 958 /* update out statistics */ 959 odev->net->stats.rx_packets++; 960 961 odev->net->stats.rx_bytes += odev->rx_buf_size; 962 963 odev->rx_buf_size = 0; 964 odev->rx_buf_missing = sizeof(struct iphdr); 965 odev->rx_parse_state = WAIT_IP; 966 } 967 break; 968 969 case WAIT_SYNC: 970 D1(" W_S"); 971 count = 0; 972 break; 973 default: 974 D1(" "); 975 count--; 976 break; 977 } 978 } 979 980 /* Recovery mechanism for WAIT_SYNC state. */ 981 if (is_eop) { 982 if (odev->rx_parse_state == WAIT_SYNC) { 983 odev->rx_parse_state = WAIT_IP; 984 odev->rx_buf_size = 0; 985 odev->rx_buf_missing = sizeof(struct iphdr); 986 } 987 } 988 } 989 990 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 991 { 992 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 993 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 994 995 if (((rest == 5) || (rest == 6)) && 996 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 997 crc_check, 4)) { 998 urb->actual_length -= 4; 999 } 1000 } 1001 1002 /* Moving data from usb to kernel (in interrupt state) */ 1003 static void read_bulk_callback(struct urb *urb) 1004 { 1005 struct hso_net *odev = urb->context; 1006 struct net_device *net; 1007 int result; 1008 int status = urb->status; 1009 1010 /* is al ok? (Filip: Who's Al ?) */ 1011 if (status) { 1012 handle_usb_error(status, __func__, odev->parent); 1013 return; 1014 } 1015 1016 /* Sanity check */ 1017 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1018 D1("BULK IN callback but driver is not active!"); 1019 return; 1020 } 1021 usb_mark_last_busy(urb->dev); 1022 1023 net = odev->net; 1024 1025 if (!netif_device_present(net)) { 1026 /* Somebody killed our network interface... */ 1027 return; 1028 } 1029 1030 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1031 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1032 1033 /* do we even have a packet? */ 1034 if (urb->actual_length) { 1035 /* Handle the IP stream, add header and push it onto network 1036 * stack if the packet is complete. */ 1037 spin_lock(&odev->net_lock); 1038 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1039 (urb->transfer_buffer_length > 1040 urb->actual_length) ? 1 : 0); 1041 spin_unlock(&odev->net_lock); 1042 } 1043 1044 /* We are done with this URB, resubmit it. Prep the USB to wait for 1045 * another frame. Reuse same as received. */ 1046 usb_fill_bulk_urb(urb, 1047 odev->parent->usb, 1048 usb_rcvbulkpipe(odev->parent->usb, 1049 odev->in_endp-> 1050 bEndpointAddress & 0x7F), 1051 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1052 read_bulk_callback, odev); 1053 1054 /* Give this to the USB subsystem so it can tell us when more data 1055 * arrives. */ 1056 result = usb_submit_urb(urb, GFP_ATOMIC); 1057 if (result) 1058 dev_warn(&odev->parent->interface->dev, 1059 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1060 result); 1061 } 1062 1063 /* Serial driver functions */ 1064 1065 static void hso_init_termios(struct ktermios *termios) 1066 { 1067 /* 1068 * The default requirements for this device are: 1069 */ 1070 termios->c_iflag &= 1071 ~(IGNBRK /* disable ignore break */ 1072 | BRKINT /* disable break causes interrupt */ 1073 | PARMRK /* disable mark parity errors */ 1074 | ISTRIP /* disable clear high bit of input characters */ 1075 | INLCR /* disable translate NL to CR */ 1076 | IGNCR /* disable ignore CR */ 1077 | ICRNL /* disable translate CR to NL */ 1078 | IXON); /* disable enable XON/XOFF flow control */ 1079 1080 /* disable postprocess output characters */ 1081 termios->c_oflag &= ~OPOST; 1082 1083 termios->c_lflag &= 1084 ~(ECHO /* disable echo input characters */ 1085 | ECHONL /* disable echo new line */ 1086 | ICANON /* disable erase, kill, werase, and rprnt 1087 special characters */ 1088 | ISIG /* disable interrupt, quit, and suspend special 1089 characters */ 1090 | IEXTEN); /* disable non-POSIX special characters */ 1091 1092 termios->c_cflag &= 1093 ~(CSIZE /* no size */ 1094 | PARENB /* disable parity bit */ 1095 | CBAUD /* clear current baud rate */ 1096 | CBAUDEX); /* clear current buad rate */ 1097 1098 termios->c_cflag |= CS8; /* character size 8 bits */ 1099 1100 /* baud rate 115200 */ 1101 tty_termios_encode_baud_rate(termios, 115200, 115200); 1102 } 1103 1104 static void _hso_serial_set_termios(struct tty_struct *tty, 1105 struct ktermios *old) 1106 { 1107 struct hso_serial *serial = tty->driver_data; 1108 1109 if (!serial) { 1110 printk(KERN_ERR "%s: no tty structures", __func__); 1111 return; 1112 } 1113 1114 D4("port %d", serial->minor); 1115 1116 /* 1117 * Fix up unsupported bits 1118 */ 1119 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1120 1121 tty->termios.c_cflag &= 1122 ~(CSIZE /* no size */ 1123 | PARENB /* disable parity bit */ 1124 | CBAUD /* clear current baud rate */ 1125 | CBAUDEX); /* clear current buad rate */ 1126 1127 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1128 1129 /* baud rate 115200 */ 1130 tty_encode_baud_rate(tty, 115200, 115200); 1131 } 1132 1133 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1134 { 1135 int result; 1136 /* We are done with this URB, resubmit it. Prep the USB to wait for 1137 * another frame */ 1138 usb_fill_bulk_urb(urb, serial->parent->usb, 1139 usb_rcvbulkpipe(serial->parent->usb, 1140 serial->in_endp-> 1141 bEndpointAddress & 0x7F), 1142 urb->transfer_buffer, serial->rx_data_length, 1143 hso_std_serial_read_bulk_callback, serial); 1144 /* Give this to the USB subsystem so it can tell us when more data 1145 * arrives. */ 1146 result = usb_submit_urb(urb, GFP_ATOMIC); 1147 if (result) { 1148 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1149 __func__, result); 1150 } 1151 } 1152 1153 1154 1155 1156 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1157 { 1158 int count; 1159 struct urb *curr_urb; 1160 1161 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1162 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1163 count = put_rxbuf_data(curr_urb, serial); 1164 if (count == -1) 1165 return; 1166 if (count == 0) { 1167 serial->curr_rx_urb_idx++; 1168 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1169 serial->curr_rx_urb_idx = 0; 1170 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1171 } 1172 } 1173 } 1174 1175 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1176 { 1177 int count = 0; 1178 struct urb *urb; 1179 1180 urb = serial->rx_urb[0]; 1181 if (serial->port.count > 0) { 1182 count = put_rxbuf_data(urb, serial); 1183 if (count == -1) 1184 return; 1185 } 1186 /* Re issue a read as long as we receive data. */ 1187 1188 if (count == 0 && ((urb->actual_length != 0) || 1189 (serial->rx_state == RX_PENDING))) { 1190 serial->rx_state = RX_SENT; 1191 hso_mux_serial_read(serial); 1192 } else 1193 serial->rx_state = RX_IDLE; 1194 } 1195 1196 1197 /* read callback for Diag and CS port */ 1198 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1199 { 1200 struct hso_serial *serial = urb->context; 1201 int status = urb->status; 1202 1203 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1204 1205 /* sanity check */ 1206 if (!serial) { 1207 D1("serial == NULL"); 1208 return; 1209 } 1210 if (status) { 1211 handle_usb_error(status, __func__, serial->parent); 1212 return; 1213 } 1214 1215 D1("Actual length = %d\n", urb->actual_length); 1216 DUMP1(urb->transfer_buffer, urb->actual_length); 1217 1218 /* Anyone listening? */ 1219 if (serial->port.count == 0) 1220 return; 1221 1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1223 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1224 /* Valid data, handle RX data */ 1225 spin_lock(&serial->serial_lock); 1226 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1227 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1228 spin_unlock(&serial->serial_lock); 1229 } 1230 1231 /* 1232 * This needs to be a tasklet otherwise we will 1233 * end up recursively calling this function. 1234 */ 1235 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1236 { 1237 unsigned long flags; 1238 1239 spin_lock_irqsave(&serial->serial_lock, flags); 1240 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1241 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1242 else 1243 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1244 spin_unlock_irqrestore(&serial->serial_lock, flags); 1245 } 1246 1247 static void hso_unthrottle(struct tty_struct *tty) 1248 { 1249 struct hso_serial *serial = tty->driver_data; 1250 1251 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1252 } 1253 1254 /* open the requested serial port */ 1255 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1256 { 1257 struct hso_serial *serial = get_serial_by_index(tty->index); 1258 int result; 1259 1260 /* sanity check */ 1261 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1262 WARN_ON(1); 1263 tty->driver_data = NULL; 1264 D1("Failed to open port"); 1265 return -ENODEV; 1266 } 1267 1268 mutex_lock(&serial->parent->mutex); 1269 result = usb_autopm_get_interface(serial->parent->interface); 1270 if (result < 0) 1271 goto err_out; 1272 1273 D1("Opening %d", serial->minor); 1274 kref_get(&serial->parent->ref); 1275 1276 /* setup */ 1277 tty->driver_data = serial; 1278 tty_port_tty_set(&serial->port, tty); 1279 1280 /* check for port already opened, if not set the termios */ 1281 serial->port.count++; 1282 if (serial->port.count == 1) { 1283 serial->rx_state = RX_IDLE; 1284 /* Force default termio settings */ 1285 _hso_serial_set_termios(tty, NULL); 1286 tasklet_init(&serial->unthrottle_tasklet, 1287 (void (*)(unsigned long))hso_unthrottle_tasklet, 1288 (unsigned long)serial); 1289 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1290 if (result) { 1291 hso_stop_serial_device(serial->parent); 1292 serial->port.count--; 1293 kref_put(&serial->parent->ref, hso_serial_ref_free); 1294 } 1295 } else { 1296 D1("Port was already open"); 1297 } 1298 1299 usb_autopm_put_interface(serial->parent->interface); 1300 1301 /* done */ 1302 if (result) 1303 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1304 err_out: 1305 mutex_unlock(&serial->parent->mutex); 1306 return result; 1307 } 1308 1309 /* close the requested serial port */ 1310 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1311 { 1312 struct hso_serial *serial = tty->driver_data; 1313 u8 usb_gone; 1314 1315 D1("Closing serial port"); 1316 1317 /* Open failed, no close cleanup required */ 1318 if (serial == NULL) 1319 return; 1320 1321 mutex_lock(&serial->parent->mutex); 1322 usb_gone = serial->parent->usb_gone; 1323 1324 if (!usb_gone) 1325 usb_autopm_get_interface(serial->parent->interface); 1326 1327 /* reset the rts and dtr */ 1328 /* do the actual close */ 1329 serial->port.count--; 1330 1331 if (serial->port.count <= 0) { 1332 serial->port.count = 0; 1333 tty_port_tty_set(&serial->port, NULL); 1334 if (!usb_gone) 1335 hso_stop_serial_device(serial->parent); 1336 tasklet_kill(&serial->unthrottle_tasklet); 1337 } 1338 1339 if (!usb_gone) 1340 usb_autopm_put_interface(serial->parent->interface); 1341 1342 mutex_unlock(&serial->parent->mutex); 1343 1344 kref_put(&serial->parent->ref, hso_serial_ref_free); 1345 } 1346 1347 /* close the requested serial port */ 1348 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1349 int count) 1350 { 1351 struct hso_serial *serial = tty->driver_data; 1352 int space, tx_bytes; 1353 unsigned long flags; 1354 1355 /* sanity check */ 1356 if (serial == NULL) { 1357 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1358 return -ENODEV; 1359 } 1360 1361 spin_lock_irqsave(&serial->serial_lock, flags); 1362 1363 space = serial->tx_data_length - serial->tx_buffer_count; 1364 tx_bytes = (count < space) ? count : space; 1365 1366 if (!tx_bytes) 1367 goto out; 1368 1369 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1370 serial->tx_buffer_count += tx_bytes; 1371 1372 out: 1373 spin_unlock_irqrestore(&serial->serial_lock, flags); 1374 1375 hso_kick_transmit(serial); 1376 /* done */ 1377 return tx_bytes; 1378 } 1379 1380 /* how much room is there for writing */ 1381 static int hso_serial_write_room(struct tty_struct *tty) 1382 { 1383 struct hso_serial *serial = tty->driver_data; 1384 int room; 1385 unsigned long flags; 1386 1387 spin_lock_irqsave(&serial->serial_lock, flags); 1388 room = serial->tx_data_length - serial->tx_buffer_count; 1389 spin_unlock_irqrestore(&serial->serial_lock, flags); 1390 1391 /* return free room */ 1392 return room; 1393 } 1394 1395 /* setup the term */ 1396 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1397 { 1398 struct hso_serial *serial = tty->driver_data; 1399 unsigned long flags; 1400 1401 if (old) 1402 D5("Termios called with: cflags new[%d] - old[%d]", 1403 tty->termios.c_cflag, old->c_cflag); 1404 1405 /* the actual setup */ 1406 spin_lock_irqsave(&serial->serial_lock, flags); 1407 if (serial->port.count) 1408 _hso_serial_set_termios(tty, old); 1409 else 1410 tty->termios = *old; 1411 spin_unlock_irqrestore(&serial->serial_lock, flags); 1412 1413 /* done */ 1414 } 1415 1416 /* how many characters in the buffer */ 1417 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1418 { 1419 struct hso_serial *serial = tty->driver_data; 1420 int chars; 1421 unsigned long flags; 1422 1423 /* sanity check */ 1424 if (serial == NULL) 1425 return 0; 1426 1427 spin_lock_irqsave(&serial->serial_lock, flags); 1428 chars = serial->tx_buffer_count; 1429 spin_unlock_irqrestore(&serial->serial_lock, flags); 1430 1431 return chars; 1432 } 1433 static int tiocmget_submit_urb(struct hso_serial *serial, 1434 struct hso_tiocmget *tiocmget, 1435 struct usb_device *usb) 1436 { 1437 int result; 1438 1439 if (serial->parent->usb_gone) 1440 return -ENODEV; 1441 usb_fill_int_urb(tiocmget->urb, usb, 1442 usb_rcvintpipe(usb, 1443 tiocmget->endp-> 1444 bEndpointAddress & 0x7F), 1445 &tiocmget->serial_state_notification, 1446 sizeof(struct hso_serial_state_notification), 1447 tiocmget_intr_callback, serial, 1448 tiocmget->endp->bInterval); 1449 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1450 if (result) { 1451 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1452 result); 1453 } 1454 return result; 1455 1456 } 1457 1458 static void tiocmget_intr_callback(struct urb *urb) 1459 { 1460 struct hso_serial *serial = urb->context; 1461 struct hso_tiocmget *tiocmget; 1462 int status = urb->status; 1463 u16 UART_state_bitmap, prev_UART_state_bitmap; 1464 struct uart_icount *icount; 1465 struct hso_serial_state_notification *serial_state_notification; 1466 struct usb_device *usb; 1467 int if_num; 1468 1469 /* Sanity checks */ 1470 if (!serial) 1471 return; 1472 if (status) { 1473 handle_usb_error(status, __func__, serial->parent); 1474 return; 1475 } 1476 1477 /* tiocmget is only supported on HSO_PORT_MODEM */ 1478 tiocmget = serial->tiocmget; 1479 if (!tiocmget) 1480 return; 1481 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1482 1483 usb = serial->parent->usb; 1484 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1485 1486 /* wIndex should be the USB interface number of the port to which the 1487 * notification applies, which should always be the Modem port. 1488 */ 1489 serial_state_notification = &tiocmget->serial_state_notification; 1490 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1491 serial_state_notification->bNotification != B_NOTIFICATION || 1492 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1493 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1494 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1495 dev_warn(&usb->dev, 1496 "hso received invalid serial state notification\n"); 1497 DUMP(serial_state_notification, 1498 sizeof(struct hso_serial_state_notification)); 1499 } else { 1500 1501 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1502 UART_state_bitmap); 1503 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1504 icount = &tiocmget->icount; 1505 spin_lock(&serial->serial_lock); 1506 if ((UART_state_bitmap & B_OVERRUN) != 1507 (prev_UART_state_bitmap & B_OVERRUN)) 1508 icount->parity++; 1509 if ((UART_state_bitmap & B_PARITY) != 1510 (prev_UART_state_bitmap & B_PARITY)) 1511 icount->parity++; 1512 if ((UART_state_bitmap & B_FRAMING) != 1513 (prev_UART_state_bitmap & B_FRAMING)) 1514 icount->frame++; 1515 if ((UART_state_bitmap & B_RING_SIGNAL) && 1516 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1517 icount->rng++; 1518 if ((UART_state_bitmap & B_BREAK) != 1519 (prev_UART_state_bitmap & B_BREAK)) 1520 icount->brk++; 1521 if ((UART_state_bitmap & B_TX_CARRIER) != 1522 (prev_UART_state_bitmap & B_TX_CARRIER)) 1523 icount->dsr++; 1524 if ((UART_state_bitmap & B_RX_CARRIER) != 1525 (prev_UART_state_bitmap & B_RX_CARRIER)) 1526 icount->dcd++; 1527 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1528 spin_unlock(&serial->serial_lock); 1529 tiocmget->intr_completed = 1; 1530 wake_up_interruptible(&tiocmget->waitq); 1531 } 1532 memset(serial_state_notification, 0, 1533 sizeof(struct hso_serial_state_notification)); 1534 tiocmget_submit_urb(serial, 1535 tiocmget, 1536 serial->parent->usb); 1537 } 1538 1539 /* 1540 * next few functions largely stolen from drivers/serial/serial_core.c 1541 */ 1542 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1543 * - mask passed in arg for lines of interest 1544 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1545 * Caller should use TIOCGICOUNT to see which one it was 1546 */ 1547 static int 1548 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1549 { 1550 DECLARE_WAITQUEUE(wait, current); 1551 struct uart_icount cprev, cnow; 1552 struct hso_tiocmget *tiocmget; 1553 int ret; 1554 1555 tiocmget = serial->tiocmget; 1556 if (!tiocmget) 1557 return -ENOENT; 1558 /* 1559 * note the counters on entry 1560 */ 1561 spin_lock_irq(&serial->serial_lock); 1562 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1563 spin_unlock_irq(&serial->serial_lock); 1564 add_wait_queue(&tiocmget->waitq, &wait); 1565 for (;;) { 1566 spin_lock_irq(&serial->serial_lock); 1567 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1568 spin_unlock_irq(&serial->serial_lock); 1569 set_current_state(TASK_INTERRUPTIBLE); 1570 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1571 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1572 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1573 ret = 0; 1574 break; 1575 } 1576 schedule(); 1577 /* see if a signal did it */ 1578 if (signal_pending(current)) { 1579 ret = -ERESTARTSYS; 1580 break; 1581 } 1582 cprev = cnow; 1583 } 1584 current->state = TASK_RUNNING; 1585 remove_wait_queue(&tiocmget->waitq, &wait); 1586 1587 return ret; 1588 } 1589 1590 /* 1591 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1592 * Return: write counters to the user passed counter struct 1593 * NB: both 1->0 and 0->1 transitions are counted except for 1594 * RI where only 0->1 is counted. 1595 */ 1596 static int hso_get_count(struct tty_struct *tty, 1597 struct serial_icounter_struct *icount) 1598 { 1599 struct uart_icount cnow; 1600 struct hso_serial *serial = tty->driver_data; 1601 struct hso_tiocmget *tiocmget = serial->tiocmget; 1602 1603 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1604 1605 if (!tiocmget) 1606 return -ENOENT; 1607 spin_lock_irq(&serial->serial_lock); 1608 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1609 spin_unlock_irq(&serial->serial_lock); 1610 1611 icount->cts = cnow.cts; 1612 icount->dsr = cnow.dsr; 1613 icount->rng = cnow.rng; 1614 icount->dcd = cnow.dcd; 1615 icount->rx = cnow.rx; 1616 icount->tx = cnow.tx; 1617 icount->frame = cnow.frame; 1618 icount->overrun = cnow.overrun; 1619 icount->parity = cnow.parity; 1620 icount->brk = cnow.brk; 1621 icount->buf_overrun = cnow.buf_overrun; 1622 1623 return 0; 1624 } 1625 1626 1627 static int hso_serial_tiocmget(struct tty_struct *tty) 1628 { 1629 int retval; 1630 struct hso_serial *serial = tty->driver_data; 1631 struct hso_tiocmget *tiocmget; 1632 u16 UART_state_bitmap; 1633 1634 /* sanity check */ 1635 if (!serial) { 1636 D1("no tty structures"); 1637 return -EINVAL; 1638 } 1639 spin_lock_irq(&serial->serial_lock); 1640 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1641 ((serial->dtr_state) ? TIOCM_DTR : 0); 1642 tiocmget = serial->tiocmget; 1643 if (tiocmget) { 1644 1645 UART_state_bitmap = le16_to_cpu( 1646 tiocmget->prev_UART_state_bitmap); 1647 if (UART_state_bitmap & B_RING_SIGNAL) 1648 retval |= TIOCM_RNG; 1649 if (UART_state_bitmap & B_RX_CARRIER) 1650 retval |= TIOCM_CD; 1651 if (UART_state_bitmap & B_TX_CARRIER) 1652 retval |= TIOCM_DSR; 1653 } 1654 spin_unlock_irq(&serial->serial_lock); 1655 return retval; 1656 } 1657 1658 static int hso_serial_tiocmset(struct tty_struct *tty, 1659 unsigned int set, unsigned int clear) 1660 { 1661 int val = 0; 1662 unsigned long flags; 1663 int if_num; 1664 struct hso_serial *serial = tty->driver_data; 1665 1666 /* sanity check */ 1667 if (!serial) { 1668 D1("no tty structures"); 1669 return -EINVAL; 1670 } 1671 1672 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1673 return -EINVAL; 1674 1675 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1676 1677 spin_lock_irqsave(&serial->serial_lock, flags); 1678 if (set & TIOCM_RTS) 1679 serial->rts_state = 1; 1680 if (set & TIOCM_DTR) 1681 serial->dtr_state = 1; 1682 1683 if (clear & TIOCM_RTS) 1684 serial->rts_state = 0; 1685 if (clear & TIOCM_DTR) 1686 serial->dtr_state = 0; 1687 1688 if (serial->dtr_state) 1689 val |= 0x01; 1690 if (serial->rts_state) 1691 val |= 0x02; 1692 1693 spin_unlock_irqrestore(&serial->serial_lock, flags); 1694 1695 return usb_control_msg(serial->parent->usb, 1696 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1697 0x21, val, if_num, NULL, 0, 1698 USB_CTRL_SET_TIMEOUT); 1699 } 1700 1701 static int hso_serial_ioctl(struct tty_struct *tty, 1702 unsigned int cmd, unsigned long arg) 1703 { 1704 struct hso_serial *serial = tty->driver_data; 1705 int ret = 0; 1706 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1707 1708 if (!serial) 1709 return -ENODEV; 1710 switch (cmd) { 1711 case TIOCMIWAIT: 1712 ret = hso_wait_modem_status(serial, arg); 1713 break; 1714 default: 1715 ret = -ENOIOCTLCMD; 1716 break; 1717 } 1718 return ret; 1719 } 1720 1721 1722 /* starts a transmit */ 1723 static void hso_kick_transmit(struct hso_serial *serial) 1724 { 1725 u8 *temp; 1726 unsigned long flags; 1727 int res; 1728 1729 spin_lock_irqsave(&serial->serial_lock, flags); 1730 if (!serial->tx_buffer_count) 1731 goto out; 1732 1733 if (serial->tx_urb_used) 1734 goto out; 1735 1736 /* Wakeup USB interface if necessary */ 1737 if (hso_get_activity(serial->parent) == -EAGAIN) 1738 goto out; 1739 1740 /* Switch pointers around to avoid memcpy */ 1741 temp = serial->tx_buffer; 1742 serial->tx_buffer = serial->tx_data; 1743 serial->tx_data = temp; 1744 serial->tx_data_count = serial->tx_buffer_count; 1745 serial->tx_buffer_count = 0; 1746 1747 /* If temp is set, it means we switched buffers */ 1748 if (temp && serial->write_data) { 1749 res = serial->write_data(serial); 1750 if (res >= 0) 1751 serial->tx_urb_used = 1; 1752 } 1753 out: 1754 spin_unlock_irqrestore(&serial->serial_lock, flags); 1755 } 1756 1757 /* make a request (for reading and writing data to muxed serial port) */ 1758 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1759 struct urb *ctrl_urb, 1760 struct usb_ctrlrequest *ctrl_req, 1761 u8 *ctrl_urb_data, u32 size) 1762 { 1763 int result; 1764 int pipe; 1765 1766 /* Sanity check */ 1767 if (!serial || !ctrl_urb || !ctrl_req) { 1768 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1769 return -EINVAL; 1770 } 1771 1772 /* initialize */ 1773 ctrl_req->wValue = 0; 1774 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1775 ctrl_req->wLength = cpu_to_le16(size); 1776 1777 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1778 /* Reading command */ 1779 ctrl_req->bRequestType = USB_DIR_IN | 1780 USB_TYPE_OPTION_VENDOR | 1781 USB_RECIP_INTERFACE; 1782 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1783 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1784 } else { 1785 /* Writing command */ 1786 ctrl_req->bRequestType = USB_DIR_OUT | 1787 USB_TYPE_OPTION_VENDOR | 1788 USB_RECIP_INTERFACE; 1789 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1790 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1791 } 1792 /* syslog */ 1793 D2("%s command (%02x) len: %d, port: %d", 1794 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1795 ctrl_req->bRequestType, ctrl_req->wLength, port); 1796 1797 /* Load ctrl urb */ 1798 ctrl_urb->transfer_flags = 0; 1799 usb_fill_control_urb(ctrl_urb, 1800 serial->parent->usb, 1801 pipe, 1802 (u8 *) ctrl_req, 1803 ctrl_urb_data, size, ctrl_callback, serial); 1804 /* Send it on merry way */ 1805 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1806 if (result) { 1807 dev_err(&ctrl_urb->dev->dev, 1808 "%s failed submit ctrl_urb %d type %d\n", __func__, 1809 result, type); 1810 return result; 1811 } 1812 1813 /* done */ 1814 return size; 1815 } 1816 1817 /* called by intr_callback when read occurs */ 1818 static int hso_mux_serial_read(struct hso_serial *serial) 1819 { 1820 if (!serial) 1821 return -EINVAL; 1822 1823 /* clean data */ 1824 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1825 /* make the request */ 1826 1827 if (serial->num_rx_urbs != 1) { 1828 dev_err(&serial->parent->interface->dev, 1829 "ERROR: mux'd reads with multiple buffers " 1830 "not possible\n"); 1831 return 0; 1832 } 1833 return mux_device_request(serial, 1834 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1835 serial->parent->port_spec & HSO_PORT_MASK, 1836 serial->rx_urb[0], 1837 &serial->ctrl_req_rx, 1838 serial->rx_data[0], serial->rx_data_length); 1839 } 1840 1841 /* used for muxed serial port callback (muxed serial read) */ 1842 static void intr_callback(struct urb *urb) 1843 { 1844 struct hso_shared_int *shared_int = urb->context; 1845 struct hso_serial *serial; 1846 unsigned char *port_req; 1847 int status = urb->status; 1848 int i; 1849 1850 usb_mark_last_busy(urb->dev); 1851 1852 /* sanity check */ 1853 if (!shared_int) 1854 return; 1855 1856 /* status check */ 1857 if (status) { 1858 handle_usb_error(status, __func__, NULL); 1859 return; 1860 } 1861 D4("\n--- Got intr callback 0x%02X ---", status); 1862 1863 /* what request? */ 1864 port_req = urb->transfer_buffer; 1865 D4(" port_req = 0x%.2X\n", *port_req); 1866 /* loop over all muxed ports to find the one sending this */ 1867 for (i = 0; i < 8; i++) { 1868 /* max 8 channels on MUX */ 1869 if (*port_req & (1 << i)) { 1870 serial = get_serial_by_shared_int_and_type(shared_int, 1871 (1 << i)); 1872 if (serial != NULL) { 1873 D1("Pending read interrupt on port %d\n", i); 1874 spin_lock(&serial->serial_lock); 1875 if (serial->rx_state == RX_IDLE && 1876 serial->port.count > 0) { 1877 /* Setup and send a ctrl req read on 1878 * port i */ 1879 if (!serial->rx_urb_filled[0]) { 1880 serial->rx_state = RX_SENT; 1881 hso_mux_serial_read(serial); 1882 } else 1883 serial->rx_state = RX_PENDING; 1884 } else { 1885 D1("Already a read pending on " 1886 "port %d or port not open\n", i); 1887 } 1888 spin_unlock(&serial->serial_lock); 1889 } 1890 } 1891 } 1892 /* Resubmit interrupt urb */ 1893 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1894 } 1895 1896 /* called for writing to muxed serial port */ 1897 static int hso_mux_serial_write_data(struct hso_serial *serial) 1898 { 1899 if (NULL == serial) 1900 return -EINVAL; 1901 1902 return mux_device_request(serial, 1903 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1904 serial->parent->port_spec & HSO_PORT_MASK, 1905 serial->tx_urb, 1906 &serial->ctrl_req_tx, 1907 serial->tx_data, serial->tx_data_count); 1908 } 1909 1910 /* write callback for Diag and CS port */ 1911 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1912 { 1913 struct hso_serial *serial = urb->context; 1914 int status = urb->status; 1915 1916 /* sanity check */ 1917 if (!serial) { 1918 D1("serial == NULL"); 1919 return; 1920 } 1921 1922 spin_lock(&serial->serial_lock); 1923 serial->tx_urb_used = 0; 1924 spin_unlock(&serial->serial_lock); 1925 if (status) { 1926 handle_usb_error(status, __func__, serial->parent); 1927 return; 1928 } 1929 hso_put_activity(serial->parent); 1930 tty_port_tty_wakeup(&serial->port); 1931 hso_kick_transmit(serial); 1932 1933 D1(" "); 1934 } 1935 1936 /* called for writing diag or CS serial port */ 1937 static int hso_std_serial_write_data(struct hso_serial *serial) 1938 { 1939 int count = serial->tx_data_count; 1940 int result; 1941 1942 usb_fill_bulk_urb(serial->tx_urb, 1943 serial->parent->usb, 1944 usb_sndbulkpipe(serial->parent->usb, 1945 serial->out_endp-> 1946 bEndpointAddress & 0x7F), 1947 serial->tx_data, serial->tx_data_count, 1948 hso_std_serial_write_bulk_callback, serial); 1949 1950 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1951 if (result) { 1952 dev_warn(&serial->parent->usb->dev, 1953 "Failed to submit urb - res %d\n", result); 1954 return result; 1955 } 1956 1957 return count; 1958 } 1959 1960 /* callback after read or write on muxed serial port */ 1961 static void ctrl_callback(struct urb *urb) 1962 { 1963 struct hso_serial *serial = urb->context; 1964 struct usb_ctrlrequest *req; 1965 int status = urb->status; 1966 1967 /* sanity check */ 1968 if (!serial) 1969 return; 1970 1971 spin_lock(&serial->serial_lock); 1972 serial->tx_urb_used = 0; 1973 spin_unlock(&serial->serial_lock); 1974 if (status) { 1975 handle_usb_error(status, __func__, serial->parent); 1976 return; 1977 } 1978 1979 /* what request? */ 1980 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1981 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1982 D4("Actual length of urb = %d\n", urb->actual_length); 1983 DUMP1(urb->transfer_buffer, urb->actual_length); 1984 1985 if (req->bRequestType == 1986 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1987 /* response to a read command */ 1988 serial->rx_urb_filled[0] = 1; 1989 spin_lock(&serial->serial_lock); 1990 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1991 spin_unlock(&serial->serial_lock); 1992 } else { 1993 hso_put_activity(serial->parent); 1994 tty_port_tty_wakeup(&serial->port); 1995 /* response to a write command */ 1996 hso_kick_transmit(serial); 1997 } 1998 } 1999 2000 /* handle RX data for serial port */ 2001 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2002 { 2003 struct tty_struct *tty; 2004 int count; 2005 2006 /* Sanity check */ 2007 if (urb == NULL || serial == NULL) { 2008 D1("serial = NULL"); 2009 return -2; 2010 } 2011 2012 tty = tty_port_tty_get(&serial->port); 2013 2014 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2015 tty_kref_put(tty); 2016 return -1; 2017 } 2018 2019 /* Push data to tty */ 2020 D1("data to push to tty"); 2021 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2022 if (count >= urb->actual_length) { 2023 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2024 urb->actual_length); 2025 tty_flip_buffer_push(&serial->port); 2026 } else { 2027 dev_warn(&serial->parent->usb->dev, 2028 "dropping data, %d bytes lost\n", urb->actual_length); 2029 } 2030 2031 tty_kref_put(tty); 2032 2033 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2034 2035 return 0; 2036 } 2037 2038 2039 /* Base driver functions */ 2040 2041 static void hso_log_port(struct hso_device *hso_dev) 2042 { 2043 char *port_type; 2044 char port_dev[20]; 2045 2046 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2047 case HSO_PORT_CONTROL: 2048 port_type = "Control"; 2049 break; 2050 case HSO_PORT_APP: 2051 port_type = "Application"; 2052 break; 2053 case HSO_PORT_GPS: 2054 port_type = "GPS"; 2055 break; 2056 case HSO_PORT_GPS_CONTROL: 2057 port_type = "GPS control"; 2058 break; 2059 case HSO_PORT_APP2: 2060 port_type = "Application2"; 2061 break; 2062 case HSO_PORT_PCSC: 2063 port_type = "PCSC"; 2064 break; 2065 case HSO_PORT_DIAG: 2066 port_type = "Diagnostic"; 2067 break; 2068 case HSO_PORT_DIAG2: 2069 port_type = "Diagnostic2"; 2070 break; 2071 case HSO_PORT_MODEM: 2072 port_type = "Modem"; 2073 break; 2074 case HSO_PORT_NETWORK: 2075 port_type = "Network"; 2076 break; 2077 default: 2078 port_type = "Unknown"; 2079 break; 2080 } 2081 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2082 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2083 } else 2084 sprintf(port_dev, "/dev/%s%d", tty_filename, 2085 dev2ser(hso_dev)->minor); 2086 2087 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2088 port_type, port_dev); 2089 } 2090 2091 static int hso_start_net_device(struct hso_device *hso_dev) 2092 { 2093 int i, result = 0; 2094 struct hso_net *hso_net = dev2net(hso_dev); 2095 2096 if (!hso_net) 2097 return -ENODEV; 2098 2099 /* send URBs for all read buffers */ 2100 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2101 2102 /* Prep a receive URB */ 2103 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2104 hso_dev->usb, 2105 usb_rcvbulkpipe(hso_dev->usb, 2106 hso_net->in_endp-> 2107 bEndpointAddress & 0x7F), 2108 hso_net->mux_bulk_rx_buf_pool[i], 2109 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2110 hso_net); 2111 2112 /* Put it out there so the device can send us stuff */ 2113 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2114 GFP_NOIO); 2115 if (result) 2116 dev_warn(&hso_dev->usb->dev, 2117 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2118 i, result); 2119 } 2120 2121 return result; 2122 } 2123 2124 static int hso_stop_net_device(struct hso_device *hso_dev) 2125 { 2126 int i; 2127 struct hso_net *hso_net = dev2net(hso_dev); 2128 2129 if (!hso_net) 2130 return -ENODEV; 2131 2132 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2133 if (hso_net->mux_bulk_rx_urb_pool[i]) 2134 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2135 2136 } 2137 if (hso_net->mux_bulk_tx_urb) 2138 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2139 2140 return 0; 2141 } 2142 2143 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2144 { 2145 int i, result = 0; 2146 struct hso_serial *serial = dev2ser(hso_dev); 2147 2148 if (!serial) 2149 return -ENODEV; 2150 2151 /* If it is not the MUX port fill in and submit a bulk urb (already 2152 * allocated in hso_serial_start) */ 2153 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2154 for (i = 0; i < serial->num_rx_urbs; i++) { 2155 usb_fill_bulk_urb(serial->rx_urb[i], 2156 serial->parent->usb, 2157 usb_rcvbulkpipe(serial->parent->usb, 2158 serial->in_endp-> 2159 bEndpointAddress & 2160 0x7F), 2161 serial->rx_data[i], 2162 serial->rx_data_length, 2163 hso_std_serial_read_bulk_callback, 2164 serial); 2165 result = usb_submit_urb(serial->rx_urb[i], flags); 2166 if (result) { 2167 dev_warn(&serial->parent->usb->dev, 2168 "Failed to submit urb - res %d\n", 2169 result); 2170 break; 2171 } 2172 } 2173 } else { 2174 mutex_lock(&serial->shared_int->shared_int_lock); 2175 if (!serial->shared_int->use_count) { 2176 result = 2177 hso_mux_submit_intr_urb(serial->shared_int, 2178 hso_dev->usb, flags); 2179 } 2180 serial->shared_int->use_count++; 2181 mutex_unlock(&serial->shared_int->shared_int_lock); 2182 } 2183 if (serial->tiocmget) 2184 tiocmget_submit_urb(serial, 2185 serial->tiocmget, 2186 serial->parent->usb); 2187 return result; 2188 } 2189 2190 static int hso_stop_serial_device(struct hso_device *hso_dev) 2191 { 2192 int i; 2193 struct hso_serial *serial = dev2ser(hso_dev); 2194 struct hso_tiocmget *tiocmget; 2195 2196 if (!serial) 2197 return -ENODEV; 2198 2199 for (i = 0; i < serial->num_rx_urbs; i++) { 2200 if (serial->rx_urb[i]) { 2201 usb_kill_urb(serial->rx_urb[i]); 2202 serial->rx_urb_filled[i] = 0; 2203 } 2204 } 2205 serial->curr_rx_urb_idx = 0; 2206 2207 if (serial->tx_urb) 2208 usb_kill_urb(serial->tx_urb); 2209 2210 if (serial->shared_int) { 2211 mutex_lock(&serial->shared_int->shared_int_lock); 2212 if (serial->shared_int->use_count && 2213 (--serial->shared_int->use_count == 0)) { 2214 struct urb *urb; 2215 2216 urb = serial->shared_int->shared_intr_urb; 2217 if (urb) 2218 usb_kill_urb(urb); 2219 } 2220 mutex_unlock(&serial->shared_int->shared_int_lock); 2221 } 2222 tiocmget = serial->tiocmget; 2223 if (tiocmget) { 2224 wake_up_interruptible(&tiocmget->waitq); 2225 usb_kill_urb(tiocmget->urb); 2226 } 2227 2228 return 0; 2229 } 2230 2231 static void hso_serial_common_free(struct hso_serial *serial) 2232 { 2233 int i; 2234 2235 if (serial->parent->dev) 2236 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2237 2238 tty_unregister_device(tty_drv, serial->minor); 2239 2240 for (i = 0; i < serial->num_rx_urbs; i++) { 2241 /* unlink and free RX URB */ 2242 usb_free_urb(serial->rx_urb[i]); 2243 /* free the RX buffer */ 2244 kfree(serial->rx_data[i]); 2245 } 2246 2247 /* unlink and free TX URB */ 2248 usb_free_urb(serial->tx_urb); 2249 kfree(serial->tx_data); 2250 tty_port_destroy(&serial->port); 2251 } 2252 2253 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2254 int rx_size, int tx_size) 2255 { 2256 struct device *dev; 2257 int minor; 2258 int i; 2259 2260 tty_port_init(&serial->port); 2261 2262 minor = get_free_serial_index(); 2263 if (minor < 0) 2264 goto exit; 2265 2266 /* register our minor number */ 2267 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv, 2268 minor, &serial->parent->interface->dev); 2269 dev = serial->parent->dev; 2270 dev_set_drvdata(dev, serial->parent); 2271 i = device_create_file(dev, &dev_attr_hsotype); 2272 2273 /* fill in specific data for later use */ 2274 serial->minor = minor; 2275 serial->magic = HSO_SERIAL_MAGIC; 2276 spin_lock_init(&serial->serial_lock); 2277 serial->num_rx_urbs = num_urbs; 2278 2279 /* RX, allocate urb and initialize */ 2280 2281 /* prepare our RX buffer */ 2282 serial->rx_data_length = rx_size; 2283 for (i = 0; i < serial->num_rx_urbs; i++) { 2284 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2285 if (!serial->rx_urb[i]) { 2286 dev_err(dev, "Could not allocate urb?\n"); 2287 goto exit; 2288 } 2289 serial->rx_urb[i]->transfer_buffer = NULL; 2290 serial->rx_urb[i]->transfer_buffer_length = 0; 2291 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2292 GFP_KERNEL); 2293 if (!serial->rx_data[i]) 2294 goto exit; 2295 } 2296 2297 /* TX, allocate urb and initialize */ 2298 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2299 if (!serial->tx_urb) { 2300 dev_err(dev, "Could not allocate urb?\n"); 2301 goto exit; 2302 } 2303 serial->tx_urb->transfer_buffer = NULL; 2304 serial->tx_urb->transfer_buffer_length = 0; 2305 /* prepare our TX buffer */ 2306 serial->tx_data_count = 0; 2307 serial->tx_buffer_count = 0; 2308 serial->tx_data_length = tx_size; 2309 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2310 if (!serial->tx_data) 2311 goto exit; 2312 2313 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2314 if (!serial->tx_buffer) 2315 goto exit; 2316 2317 return 0; 2318 exit: 2319 hso_serial_common_free(serial); 2320 return -1; 2321 } 2322 2323 /* Creates a general hso device */ 2324 static struct hso_device *hso_create_device(struct usb_interface *intf, 2325 int port_spec) 2326 { 2327 struct hso_device *hso_dev; 2328 2329 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2330 if (!hso_dev) 2331 return NULL; 2332 2333 hso_dev->port_spec = port_spec; 2334 hso_dev->usb = interface_to_usbdev(intf); 2335 hso_dev->interface = intf; 2336 kref_init(&hso_dev->ref); 2337 mutex_init(&hso_dev->mutex); 2338 2339 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2340 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2341 INIT_WORK(&hso_dev->reset_device, reset_device); 2342 2343 return hso_dev; 2344 } 2345 2346 /* Removes a network device in the network device table */ 2347 static int remove_net_device(struct hso_device *hso_dev) 2348 { 2349 int i; 2350 2351 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2352 if (network_table[i] == hso_dev) { 2353 network_table[i] = NULL; 2354 break; 2355 } 2356 } 2357 if (i == HSO_MAX_NET_DEVICES) 2358 return -1; 2359 return 0; 2360 } 2361 2362 /* Frees our network device */ 2363 static void hso_free_net_device(struct hso_device *hso_dev) 2364 { 2365 int i; 2366 struct hso_net *hso_net = dev2net(hso_dev); 2367 2368 if (!hso_net) 2369 return; 2370 2371 remove_net_device(hso_net->parent); 2372 2373 if (hso_net->net) 2374 unregister_netdev(hso_net->net); 2375 2376 /* start freeing */ 2377 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2378 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2379 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2380 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2381 } 2382 usb_free_urb(hso_net->mux_bulk_tx_urb); 2383 kfree(hso_net->mux_bulk_tx_buf); 2384 hso_net->mux_bulk_tx_buf = NULL; 2385 2386 if (hso_net->net) 2387 free_netdev(hso_net->net); 2388 2389 kfree(hso_dev); 2390 } 2391 2392 static const struct net_device_ops hso_netdev_ops = { 2393 .ndo_open = hso_net_open, 2394 .ndo_stop = hso_net_close, 2395 .ndo_start_xmit = hso_net_start_xmit, 2396 .ndo_tx_timeout = hso_net_tx_timeout, 2397 }; 2398 2399 /* initialize the network interface */ 2400 static void hso_net_init(struct net_device *net) 2401 { 2402 struct hso_net *hso_net = netdev_priv(net); 2403 2404 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2405 2406 /* fill in the other fields */ 2407 net->netdev_ops = &hso_netdev_ops; 2408 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2409 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2410 net->type = ARPHRD_NONE; 2411 net->mtu = DEFAULT_MTU - 14; 2412 net->tx_queue_len = 10; 2413 net->ethtool_ops = &ops; 2414 2415 /* and initialize the semaphore */ 2416 spin_lock_init(&hso_net->net_lock); 2417 } 2418 2419 /* Adds a network device in the network device table */ 2420 static int add_net_device(struct hso_device *hso_dev) 2421 { 2422 int i; 2423 2424 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2425 if (network_table[i] == NULL) { 2426 network_table[i] = hso_dev; 2427 break; 2428 } 2429 } 2430 if (i == HSO_MAX_NET_DEVICES) 2431 return -1; 2432 return 0; 2433 } 2434 2435 static int hso_rfkill_set_block(void *data, bool blocked) 2436 { 2437 struct hso_device *hso_dev = data; 2438 int enabled = !blocked; 2439 int rv; 2440 2441 mutex_lock(&hso_dev->mutex); 2442 if (hso_dev->usb_gone) 2443 rv = 0; 2444 else 2445 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2446 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2447 USB_CTRL_SET_TIMEOUT); 2448 mutex_unlock(&hso_dev->mutex); 2449 return rv; 2450 } 2451 2452 static const struct rfkill_ops hso_rfkill_ops = { 2453 .set_block = hso_rfkill_set_block, 2454 }; 2455 2456 /* Creates and sets up everything for rfkill */ 2457 static void hso_create_rfkill(struct hso_device *hso_dev, 2458 struct usb_interface *interface) 2459 { 2460 struct hso_net *hso_net = dev2net(hso_dev); 2461 struct device *dev = &hso_net->net->dev; 2462 char *rfkn; 2463 2464 rfkn = kzalloc(20, GFP_KERNEL); 2465 if (!rfkn) 2466 dev_err(dev, "%s - Out of memory\n", __func__); 2467 2468 snprintf(rfkn, 20, "hso-%d", 2469 interface->altsetting->desc.bInterfaceNumber); 2470 2471 hso_net->rfkill = rfkill_alloc(rfkn, 2472 &interface_to_usbdev(interface)->dev, 2473 RFKILL_TYPE_WWAN, 2474 &hso_rfkill_ops, hso_dev); 2475 if (!hso_net->rfkill) { 2476 dev_err(dev, "%s - Out of memory\n", __func__); 2477 kfree(rfkn); 2478 return; 2479 } 2480 if (rfkill_register(hso_net->rfkill) < 0) { 2481 rfkill_destroy(hso_net->rfkill); 2482 kfree(rfkn); 2483 hso_net->rfkill = NULL; 2484 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2485 return; 2486 } 2487 } 2488 2489 static struct device_type hso_type = { 2490 .name = "wwan", 2491 }; 2492 2493 /* Creates our network device */ 2494 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2495 int port_spec) 2496 { 2497 int result, i; 2498 struct net_device *net; 2499 struct hso_net *hso_net; 2500 struct hso_device *hso_dev; 2501 2502 hso_dev = hso_create_device(interface, port_spec); 2503 if (!hso_dev) 2504 return NULL; 2505 2506 /* allocate our network device, then we can put in our private data */ 2507 /* call hso_net_init to do the basic initialization */ 2508 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2509 hso_net_init); 2510 if (!net) { 2511 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2512 goto exit; 2513 } 2514 2515 hso_net = netdev_priv(net); 2516 2517 hso_dev->port_data.dev_net = hso_net; 2518 hso_net->net = net; 2519 hso_net->parent = hso_dev; 2520 2521 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2522 USB_DIR_IN); 2523 if (!hso_net->in_endp) { 2524 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2525 goto exit; 2526 } 2527 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2528 USB_DIR_OUT); 2529 if (!hso_net->out_endp) { 2530 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2531 goto exit; 2532 } 2533 SET_NETDEV_DEV(net, &interface->dev); 2534 SET_NETDEV_DEVTYPE(net, &hso_type); 2535 2536 /* registering our net device */ 2537 result = register_netdev(net); 2538 if (result) { 2539 dev_err(&interface->dev, "Failed to register device\n"); 2540 goto exit; 2541 } 2542 2543 /* start allocating */ 2544 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2545 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2546 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2547 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2548 goto exit; 2549 } 2550 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2551 GFP_KERNEL); 2552 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2553 goto exit; 2554 } 2555 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2556 if (!hso_net->mux_bulk_tx_urb) { 2557 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2558 goto exit; 2559 } 2560 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2561 if (!hso_net->mux_bulk_tx_buf) 2562 goto exit; 2563 2564 add_net_device(hso_dev); 2565 2566 hso_log_port(hso_dev); 2567 2568 hso_create_rfkill(hso_dev, interface); 2569 2570 return hso_dev; 2571 exit: 2572 hso_free_net_device(hso_dev); 2573 return NULL; 2574 } 2575 2576 static void hso_free_tiomget(struct hso_serial *serial) 2577 { 2578 struct hso_tiocmget *tiocmget; 2579 if (!serial) 2580 return; 2581 tiocmget = serial->tiocmget; 2582 if (tiocmget) { 2583 usb_free_urb(tiocmget->urb); 2584 tiocmget->urb = NULL; 2585 serial->tiocmget = NULL; 2586 kfree(tiocmget); 2587 } 2588 } 2589 2590 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2591 static void hso_free_serial_device(struct hso_device *hso_dev) 2592 { 2593 struct hso_serial *serial = dev2ser(hso_dev); 2594 2595 if (!serial) 2596 return; 2597 set_serial_by_index(serial->minor, NULL); 2598 2599 hso_serial_common_free(serial); 2600 2601 if (serial->shared_int) { 2602 mutex_lock(&serial->shared_int->shared_int_lock); 2603 if (--serial->shared_int->ref_count == 0) 2604 hso_free_shared_int(serial->shared_int); 2605 else 2606 mutex_unlock(&serial->shared_int->shared_int_lock); 2607 } 2608 hso_free_tiomget(serial); 2609 kfree(serial); 2610 kfree(hso_dev); 2611 } 2612 2613 /* Creates a bulk AT channel */ 2614 static struct hso_device *hso_create_bulk_serial_device( 2615 struct usb_interface *interface, int port) 2616 { 2617 struct hso_device *hso_dev; 2618 struct hso_serial *serial; 2619 int num_urbs; 2620 struct hso_tiocmget *tiocmget; 2621 2622 hso_dev = hso_create_device(interface, port); 2623 if (!hso_dev) 2624 return NULL; 2625 2626 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2627 if (!serial) 2628 goto exit; 2629 2630 serial->parent = hso_dev; 2631 hso_dev->port_data.dev_serial = serial; 2632 2633 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2634 num_urbs = 2; 2635 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2636 GFP_KERNEL); 2637 /* it isn't going to break our heart if serial->tiocmget 2638 * allocation fails don't bother checking this. 2639 */ 2640 if (serial->tiocmget) { 2641 tiocmget = serial->tiocmget; 2642 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2643 if (tiocmget->urb) { 2644 mutex_init(&tiocmget->mutex); 2645 init_waitqueue_head(&tiocmget->waitq); 2646 tiocmget->endp = hso_get_ep( 2647 interface, 2648 USB_ENDPOINT_XFER_INT, 2649 USB_DIR_IN); 2650 } else 2651 hso_free_tiomget(serial); 2652 } 2653 } 2654 else 2655 num_urbs = 1; 2656 2657 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2658 BULK_URB_TX_SIZE)) 2659 goto exit; 2660 2661 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2662 USB_DIR_IN); 2663 if (!serial->in_endp) { 2664 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2665 goto exit2; 2666 } 2667 2668 if (! 2669 (serial->out_endp = 2670 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2671 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2672 goto exit2; 2673 } 2674 2675 serial->write_data = hso_std_serial_write_data; 2676 2677 /* and record this serial */ 2678 set_serial_by_index(serial->minor, serial); 2679 2680 /* setup the proc dirs and files if needed */ 2681 hso_log_port(hso_dev); 2682 2683 /* done, return it */ 2684 return hso_dev; 2685 2686 exit2: 2687 hso_serial_common_free(serial); 2688 exit: 2689 hso_free_tiomget(serial); 2690 kfree(serial); 2691 kfree(hso_dev); 2692 return NULL; 2693 } 2694 2695 /* Creates a multiplexed AT channel */ 2696 static 2697 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2698 int port, 2699 struct hso_shared_int *mux) 2700 { 2701 struct hso_device *hso_dev; 2702 struct hso_serial *serial; 2703 int port_spec; 2704 2705 port_spec = HSO_INTF_MUX; 2706 port_spec &= ~HSO_PORT_MASK; 2707 2708 port_spec |= hso_mux_to_port(port); 2709 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2710 return NULL; 2711 2712 hso_dev = hso_create_device(interface, port_spec); 2713 if (!hso_dev) 2714 return NULL; 2715 2716 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2717 if (!serial) 2718 goto exit; 2719 2720 hso_dev->port_data.dev_serial = serial; 2721 serial->parent = hso_dev; 2722 2723 if (hso_serial_common_create 2724 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2725 goto exit; 2726 2727 serial->tx_data_length--; 2728 serial->write_data = hso_mux_serial_write_data; 2729 2730 serial->shared_int = mux; 2731 mutex_lock(&serial->shared_int->shared_int_lock); 2732 serial->shared_int->ref_count++; 2733 mutex_unlock(&serial->shared_int->shared_int_lock); 2734 2735 /* and record this serial */ 2736 set_serial_by_index(serial->minor, serial); 2737 2738 /* setup the proc dirs and files if needed */ 2739 hso_log_port(hso_dev); 2740 2741 /* done, return it */ 2742 return hso_dev; 2743 2744 exit: 2745 if (serial) { 2746 tty_unregister_device(tty_drv, serial->minor); 2747 kfree(serial); 2748 } 2749 kfree(hso_dev); 2750 return NULL; 2751 2752 } 2753 2754 static void hso_free_shared_int(struct hso_shared_int *mux) 2755 { 2756 usb_free_urb(mux->shared_intr_urb); 2757 kfree(mux->shared_intr_buf); 2758 mutex_unlock(&mux->shared_int_lock); 2759 kfree(mux); 2760 } 2761 2762 static 2763 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2764 { 2765 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2766 2767 if (!mux) 2768 return NULL; 2769 2770 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2771 USB_DIR_IN); 2772 if (!mux->intr_endp) { 2773 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2774 goto exit; 2775 } 2776 2777 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2778 if (!mux->shared_intr_urb) { 2779 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2780 goto exit; 2781 } 2782 mux->shared_intr_buf = 2783 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2784 GFP_KERNEL); 2785 if (!mux->shared_intr_buf) 2786 goto exit; 2787 2788 mutex_init(&mux->shared_int_lock); 2789 2790 return mux; 2791 2792 exit: 2793 kfree(mux->shared_intr_buf); 2794 usb_free_urb(mux->shared_intr_urb); 2795 kfree(mux); 2796 return NULL; 2797 } 2798 2799 /* Gets the port spec for a certain interface */ 2800 static int hso_get_config_data(struct usb_interface *interface) 2801 { 2802 struct usb_device *usbdev = interface_to_usbdev(interface); 2803 u8 *config_data = kmalloc(17, GFP_KERNEL); 2804 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2805 s32 result; 2806 2807 if (!config_data) 2808 return -ENOMEM; 2809 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2810 0x86, 0xC0, 0, 0, config_data, 17, 2811 USB_CTRL_SET_TIMEOUT) != 0x11) { 2812 kfree(config_data); 2813 return -EIO; 2814 } 2815 2816 switch (config_data[if_num]) { 2817 case 0x0: 2818 result = 0; 2819 break; 2820 case 0x1: 2821 result = HSO_PORT_DIAG; 2822 break; 2823 case 0x2: 2824 result = HSO_PORT_GPS; 2825 break; 2826 case 0x3: 2827 result = HSO_PORT_GPS_CONTROL; 2828 break; 2829 case 0x4: 2830 result = HSO_PORT_APP; 2831 break; 2832 case 0x5: 2833 result = HSO_PORT_APP2; 2834 break; 2835 case 0x6: 2836 result = HSO_PORT_CONTROL; 2837 break; 2838 case 0x7: 2839 result = HSO_PORT_NETWORK; 2840 break; 2841 case 0x8: 2842 result = HSO_PORT_MODEM; 2843 break; 2844 case 0x9: 2845 result = HSO_PORT_MSD; 2846 break; 2847 case 0xa: 2848 result = HSO_PORT_PCSC; 2849 break; 2850 case 0xb: 2851 result = HSO_PORT_VOICE; 2852 break; 2853 default: 2854 result = 0; 2855 } 2856 2857 if (result) 2858 result |= HSO_INTF_BULK; 2859 2860 if (config_data[16] & 0x1) 2861 result |= HSO_INFO_CRC_BUG; 2862 2863 kfree(config_data); 2864 return result; 2865 } 2866 2867 /* called once for each interface upon device insertion */ 2868 static int hso_probe(struct usb_interface *interface, 2869 const struct usb_device_id *id) 2870 { 2871 int mux, i, if_num, port_spec; 2872 unsigned char port_mask; 2873 struct hso_device *hso_dev = NULL; 2874 struct hso_shared_int *shared_int; 2875 struct hso_device *tmp_dev = NULL; 2876 2877 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2878 dev_err(&interface->dev, "Not our interface\n"); 2879 return -ENODEV; 2880 } 2881 2882 if_num = interface->altsetting->desc.bInterfaceNumber; 2883 2884 /* Get the interface/port specification from either driver_info or from 2885 * the device itself */ 2886 if (id->driver_info) 2887 port_spec = ((u32 *)(id->driver_info))[if_num]; 2888 else 2889 port_spec = hso_get_config_data(interface); 2890 2891 /* Check if we need to switch to alt interfaces prior to port 2892 * configuration */ 2893 if (interface->num_altsetting > 1) 2894 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2895 interface->needs_remote_wakeup = 1; 2896 2897 /* Allocate new hso device(s) */ 2898 switch (port_spec & HSO_INTF_MASK) { 2899 case HSO_INTF_MUX: 2900 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2901 /* Create the network device */ 2902 if (!disable_net) { 2903 hso_dev = hso_create_net_device(interface, 2904 port_spec); 2905 if (!hso_dev) 2906 goto exit; 2907 tmp_dev = hso_dev; 2908 } 2909 } 2910 2911 if (hso_get_mux_ports(interface, &port_mask)) 2912 /* TODO: de-allocate everything */ 2913 goto exit; 2914 2915 shared_int = hso_create_shared_int(interface); 2916 if (!shared_int) 2917 goto exit; 2918 2919 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2920 if (port_mask & i) { 2921 hso_dev = hso_create_mux_serial_device( 2922 interface, i, shared_int); 2923 if (!hso_dev) 2924 goto exit; 2925 } 2926 } 2927 2928 if (tmp_dev) 2929 hso_dev = tmp_dev; 2930 break; 2931 2932 case HSO_INTF_BULK: 2933 /* It's a regular bulk interface */ 2934 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2935 if (!disable_net) 2936 hso_dev = 2937 hso_create_net_device(interface, port_spec); 2938 } else { 2939 hso_dev = 2940 hso_create_bulk_serial_device(interface, port_spec); 2941 } 2942 if (!hso_dev) 2943 goto exit; 2944 break; 2945 default: 2946 goto exit; 2947 } 2948 2949 /* save our data pointer in this device */ 2950 usb_set_intfdata(interface, hso_dev); 2951 2952 /* done */ 2953 return 0; 2954 exit: 2955 hso_free_interface(interface); 2956 return -ENODEV; 2957 } 2958 2959 /* device removed, cleaning up */ 2960 static void hso_disconnect(struct usb_interface *interface) 2961 { 2962 hso_free_interface(interface); 2963 2964 /* remove reference of our private data */ 2965 usb_set_intfdata(interface, NULL); 2966 } 2967 2968 static void async_get_intf(struct work_struct *data) 2969 { 2970 struct hso_device *hso_dev = 2971 container_of(data, struct hso_device, async_get_intf); 2972 usb_autopm_get_interface(hso_dev->interface); 2973 } 2974 2975 static void async_put_intf(struct work_struct *data) 2976 { 2977 struct hso_device *hso_dev = 2978 container_of(data, struct hso_device, async_put_intf); 2979 usb_autopm_put_interface(hso_dev->interface); 2980 } 2981 2982 static int hso_get_activity(struct hso_device *hso_dev) 2983 { 2984 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2985 if (!hso_dev->is_active) { 2986 hso_dev->is_active = 1; 2987 schedule_work(&hso_dev->async_get_intf); 2988 } 2989 } 2990 2991 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2992 return -EAGAIN; 2993 2994 usb_mark_last_busy(hso_dev->usb); 2995 2996 return 0; 2997 } 2998 2999 static int hso_put_activity(struct hso_device *hso_dev) 3000 { 3001 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3002 if (hso_dev->is_active) { 3003 hso_dev->is_active = 0; 3004 schedule_work(&hso_dev->async_put_intf); 3005 return -EAGAIN; 3006 } 3007 } 3008 hso_dev->is_active = 0; 3009 return 0; 3010 } 3011 3012 /* called by kernel when we need to suspend device */ 3013 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3014 { 3015 int i, result; 3016 3017 /* Stop all serial ports */ 3018 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3019 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3020 result = hso_stop_serial_device(serial_table[i]); 3021 if (result) 3022 goto out; 3023 } 3024 } 3025 3026 /* Stop all network ports */ 3027 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3028 if (network_table[i] && 3029 (network_table[i]->interface == iface)) { 3030 result = hso_stop_net_device(network_table[i]); 3031 if (result) 3032 goto out; 3033 } 3034 } 3035 3036 out: 3037 return 0; 3038 } 3039 3040 /* called by kernel when we need to resume device */ 3041 static int hso_resume(struct usb_interface *iface) 3042 { 3043 int i, result = 0; 3044 struct hso_net *hso_net; 3045 3046 /* Start all serial ports */ 3047 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3048 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3049 if (dev2ser(serial_table[i])->port.count) { 3050 result = 3051 hso_start_serial_device(serial_table[i], GFP_NOIO); 3052 hso_kick_transmit(dev2ser(serial_table[i])); 3053 if (result) 3054 goto out; 3055 } 3056 } 3057 } 3058 3059 /* Start all network ports */ 3060 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3061 if (network_table[i] && 3062 (network_table[i]->interface == iface)) { 3063 hso_net = dev2net(network_table[i]); 3064 if (hso_net->flags & IFF_UP) { 3065 /* First transmit any lingering data, 3066 then restart the device. */ 3067 if (hso_net->skb_tx_buf) { 3068 dev_dbg(&iface->dev, 3069 "Transmitting" 3070 " lingering data\n"); 3071 hso_net_start_xmit(hso_net->skb_tx_buf, 3072 hso_net->net); 3073 hso_net->skb_tx_buf = NULL; 3074 } 3075 result = hso_start_net_device(network_table[i]); 3076 if (result) 3077 goto out; 3078 } 3079 } 3080 } 3081 3082 out: 3083 return result; 3084 } 3085 3086 static void reset_device(struct work_struct *data) 3087 { 3088 struct hso_device *hso_dev = 3089 container_of(data, struct hso_device, reset_device); 3090 struct usb_device *usb = hso_dev->usb; 3091 int result; 3092 3093 if (hso_dev->usb_gone) { 3094 D1("No reset during disconnect\n"); 3095 } else { 3096 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3097 if (result < 0) 3098 D1("unable to lock device for reset: %d\n", result); 3099 else { 3100 usb_reset_device(usb); 3101 usb_unlock_device(usb); 3102 } 3103 } 3104 } 3105 3106 static void hso_serial_ref_free(struct kref *ref) 3107 { 3108 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3109 3110 hso_free_serial_device(hso_dev); 3111 } 3112 3113 static void hso_free_interface(struct usb_interface *interface) 3114 { 3115 struct hso_serial *hso_dev; 3116 int i; 3117 3118 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3119 if (serial_table[i] && 3120 (serial_table[i]->interface == interface)) { 3121 hso_dev = dev2ser(serial_table[i]); 3122 tty_port_tty_hangup(&hso_dev->port, false); 3123 mutex_lock(&hso_dev->parent->mutex); 3124 hso_dev->parent->usb_gone = 1; 3125 mutex_unlock(&hso_dev->parent->mutex); 3126 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3127 } 3128 } 3129 3130 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3131 if (network_table[i] && 3132 (network_table[i]->interface == interface)) { 3133 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3134 /* hso_stop_net_device doesn't stop the net queue since 3135 * traffic needs to start it again when suspended */ 3136 netif_stop_queue(dev2net(network_table[i])->net); 3137 hso_stop_net_device(network_table[i]); 3138 cancel_work_sync(&network_table[i]->async_put_intf); 3139 cancel_work_sync(&network_table[i]->async_get_intf); 3140 if (rfk) { 3141 rfkill_unregister(rfk); 3142 rfkill_destroy(rfk); 3143 } 3144 hso_free_net_device(network_table[i]); 3145 } 3146 } 3147 } 3148 3149 /* Helper functions */ 3150 3151 /* Get the endpoint ! */ 3152 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3153 int type, int dir) 3154 { 3155 int i; 3156 struct usb_host_interface *iface = intf->cur_altsetting; 3157 struct usb_endpoint_descriptor *endp; 3158 3159 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3160 endp = &iface->endpoint[i].desc; 3161 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3162 (usb_endpoint_type(endp) == type)) 3163 return endp; 3164 } 3165 3166 return NULL; 3167 } 3168 3169 /* Get the byte that describes which ports are enabled */ 3170 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3171 { 3172 int i; 3173 struct usb_host_interface *iface = intf->cur_altsetting; 3174 3175 if (iface->extralen == 3) { 3176 *ports = iface->extra[2]; 3177 return 0; 3178 } 3179 3180 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3181 if (iface->endpoint[i].extralen == 3) { 3182 *ports = iface->endpoint[i].extra[2]; 3183 return 0; 3184 } 3185 } 3186 3187 return -1; 3188 } 3189 3190 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3191 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3192 struct usb_device *usb, gfp_t gfp) 3193 { 3194 int result; 3195 3196 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3197 usb_rcvintpipe(usb, 3198 shared_int->intr_endp->bEndpointAddress & 0x7F), 3199 shared_int->shared_intr_buf, 3200 1, 3201 intr_callback, shared_int, 3202 shared_int->intr_endp->bInterval); 3203 3204 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3205 if (result) 3206 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3207 result); 3208 3209 return result; 3210 } 3211 3212 /* operations setup of the serial interface */ 3213 static const struct tty_operations hso_serial_ops = { 3214 .open = hso_serial_open, 3215 .close = hso_serial_close, 3216 .write = hso_serial_write, 3217 .write_room = hso_serial_write_room, 3218 .ioctl = hso_serial_ioctl, 3219 .set_termios = hso_serial_set_termios, 3220 .chars_in_buffer = hso_serial_chars_in_buffer, 3221 .tiocmget = hso_serial_tiocmget, 3222 .tiocmset = hso_serial_tiocmset, 3223 .get_icount = hso_get_count, 3224 .unthrottle = hso_unthrottle 3225 }; 3226 3227 static struct usb_driver hso_driver = { 3228 .name = driver_name, 3229 .probe = hso_probe, 3230 .disconnect = hso_disconnect, 3231 .id_table = hso_ids, 3232 .suspend = hso_suspend, 3233 .resume = hso_resume, 3234 .reset_resume = hso_resume, 3235 .supports_autosuspend = 1, 3236 .disable_hub_initiated_lpm = 1, 3237 }; 3238 3239 static int __init hso_init(void) 3240 { 3241 int i; 3242 int result; 3243 3244 /* put it in the log */ 3245 printk(KERN_INFO "hso: %s\n", version); 3246 3247 /* Initialise the serial table semaphore and table */ 3248 spin_lock_init(&serial_table_lock); 3249 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3250 serial_table[i] = NULL; 3251 3252 /* allocate our driver using the proper amount of supported minors */ 3253 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3254 if (!tty_drv) 3255 return -ENOMEM; 3256 3257 /* fill in all needed values */ 3258 tty_drv->driver_name = driver_name; 3259 tty_drv->name = tty_filename; 3260 3261 /* if major number is provided as parameter, use that one */ 3262 if (tty_major) 3263 tty_drv->major = tty_major; 3264 3265 tty_drv->minor_start = 0; 3266 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3267 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3268 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3269 tty_drv->init_termios = tty_std_termios; 3270 hso_init_termios(&tty_drv->init_termios); 3271 tty_set_operations(tty_drv, &hso_serial_ops); 3272 3273 /* register the tty driver */ 3274 result = tty_register_driver(tty_drv); 3275 if (result) { 3276 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3277 __func__, result); 3278 goto err_free_tty; 3279 } 3280 3281 /* register this module as an usb driver */ 3282 result = usb_register(&hso_driver); 3283 if (result) { 3284 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3285 result); 3286 goto err_unreg_tty; 3287 } 3288 3289 /* done */ 3290 return 0; 3291 err_unreg_tty: 3292 tty_unregister_driver(tty_drv); 3293 err_free_tty: 3294 put_tty_driver(tty_drv); 3295 return result; 3296 } 3297 3298 static void __exit hso_exit(void) 3299 { 3300 printk(KERN_INFO "hso: unloaded\n"); 3301 3302 tty_unregister_driver(tty_drv); 3303 put_tty_driver(tty_drv); 3304 /* deregister the usb driver */ 3305 usb_deregister(&hso_driver); 3306 } 3307 3308 /* Module definitions */ 3309 module_init(hso_init); 3310 module_exit(hso_exit); 3311 3312 MODULE_AUTHOR(MOD_AUTHOR); 3313 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3314 MODULE_LICENSE(MOD_LICENSE); 3315 3316 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3317 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3318 module_param(debug, int, S_IRUGO | S_IWUSR); 3319 3320 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3321 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3322 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3323 3324 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3325 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3326 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3327