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/tty.h> 62 #include <linux/tty_driver.h> 63 #include <linux/tty_flip.h> 64 #include <linux/kmod.h> 65 #include <linux/rfkill.h> 66 #include <linux/ip.h> 67 #include <linux/uaccess.h> 68 #include <linux/usb/cdc.h> 69 #include <net/arp.h> 70 #include <asm/byteorder.h> 71 #include <linux/serial_core.h> 72 #include <linux/serial.h> 73 74 75 #define MOD_AUTHOR "Option Wireless" 76 #define MOD_DESCRIPTION "USB High Speed Option driver" 77 #define MOD_LICENSE "GPL" 78 79 #define HSO_MAX_NET_DEVICES 10 80 #define HSO__MAX_MTU 2048 81 #define DEFAULT_MTU 1500 82 #define DEFAULT_MRU 1500 83 84 #define CTRL_URB_RX_SIZE 1024 85 #define CTRL_URB_TX_SIZE 64 86 87 #define BULK_URB_RX_SIZE 4096 88 #define BULK_URB_TX_SIZE 8192 89 90 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 91 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 92 #define MUX_BULK_RX_BUF_COUNT 4 93 #define USB_TYPE_OPTION_VENDOR 0x20 94 95 /* These definitions are used with the struct hso_net flags element */ 96 /* - use *_bit operations on it. (bit indices not values.) */ 97 #define HSO_NET_RUNNING 0 98 99 #define HSO_NET_TX_TIMEOUT (HZ*10) 100 101 #define HSO_SERIAL_MAGIC 0x48534f31 102 103 /* Number of ttys to handle */ 104 #define HSO_SERIAL_TTY_MINORS 256 105 106 #define MAX_RX_URBS 2 107 108 /*****************************************************************************/ 109 /* Debugging functions */ 110 /*****************************************************************************/ 111 #define D__(lvl_, fmt, arg...) \ 112 do { \ 113 printk(lvl_ "[%d:%s]: " fmt "\n", \ 114 __LINE__, __func__, ## arg); \ 115 } while (0) 116 117 #define D_(lvl, args...) \ 118 do { \ 119 if (lvl & debug) \ 120 D__(KERN_INFO, args); \ 121 } while (0) 122 123 #define D1(args...) D_(0x01, ##args) 124 #define D2(args...) D_(0x02, ##args) 125 #define D3(args...) D_(0x04, ##args) 126 #define D4(args...) D_(0x08, ##args) 127 #define D5(args...) D_(0x10, ##args) 128 129 /*****************************************************************************/ 130 /* Enumerators */ 131 /*****************************************************************************/ 132 enum pkt_parse_state { 133 WAIT_IP, 134 WAIT_DATA, 135 WAIT_SYNC 136 }; 137 138 /*****************************************************************************/ 139 /* Structs */ 140 /*****************************************************************************/ 141 142 struct hso_shared_int { 143 struct usb_endpoint_descriptor *intr_endp; 144 void *shared_intr_buf; 145 struct urb *shared_intr_urb; 146 struct usb_device *usb; 147 int use_count; 148 int ref_count; 149 struct mutex shared_int_lock; 150 }; 151 152 struct hso_net { 153 struct hso_device *parent; 154 struct net_device *net; 155 struct rfkill *rfkill; 156 char name[24]; 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; 277 278 struct usb_device *usb; 279 struct usb_interface *interface; 280 281 struct device *dev; 282 struct kref ref; 283 struct mutex mutex; 284 }; 285 286 /* Type of interface */ 287 #define HSO_INTF_MASK 0xFF00 288 #define HSO_INTF_MUX 0x0100 289 #define HSO_INTF_BULK 0x0200 290 291 /* Type of port */ 292 #define HSO_PORT_MASK 0xFF 293 #define HSO_PORT_NO_PORT 0x0 294 #define HSO_PORT_CONTROL 0x1 295 #define HSO_PORT_APP 0x2 296 #define HSO_PORT_GPS 0x3 297 #define HSO_PORT_PCSC 0x4 298 #define HSO_PORT_APP2 0x5 299 #define HSO_PORT_GPS_CONTROL 0x6 300 #define HSO_PORT_MSD 0x7 301 #define HSO_PORT_VOICE 0x8 302 #define HSO_PORT_DIAG2 0x9 303 #define HSO_PORT_DIAG 0x10 304 #define HSO_PORT_MODEM 0x11 305 #define HSO_PORT_NETWORK 0x12 306 307 /* Additional device info */ 308 #define HSO_INFO_MASK 0xFF000000 309 #define HSO_INFO_CRC_BUG 0x01000000 310 311 /*****************************************************************************/ 312 /* Prototypes */ 313 /*****************************************************************************/ 314 /* Serial driver functions */ 315 static int hso_serial_tiocmset(struct tty_struct *tty, 316 unsigned int set, unsigned int clear); 317 static void ctrl_callback(struct urb *urb); 318 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 319 static void hso_kick_transmit(struct hso_serial *serial); 320 /* Helper functions */ 321 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 322 struct usb_device *usb, gfp_t gfp); 323 static void handle_usb_error(int status, const char *function, 324 struct hso_device *hso_dev); 325 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 326 int type, int dir); 327 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 328 static void hso_free_interface(struct usb_interface *intf); 329 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 330 static int hso_stop_serial_device(struct hso_device *hso_dev); 331 static int hso_start_net_device(struct hso_device *hso_dev); 332 static void hso_free_shared_int(struct hso_shared_int *shared_int); 333 static int hso_stop_net_device(struct hso_device *hso_dev); 334 static void hso_serial_ref_free(struct kref *ref); 335 static void hso_std_serial_read_bulk_callback(struct urb *urb); 336 static int hso_mux_serial_read(struct hso_serial *serial); 337 static void async_get_intf(struct work_struct *data); 338 static void async_put_intf(struct work_struct *data); 339 static int hso_put_activity(struct hso_device *hso_dev); 340 static int hso_get_activity(struct hso_device *hso_dev); 341 static void tiocmget_intr_callback(struct urb *urb); 342 /*****************************************************************************/ 343 /* Helping functions */ 344 /*****************************************************************************/ 345 346 /* #define DEBUG */ 347 348 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 349 { 350 return hso_dev->port_data.dev_net; 351 } 352 353 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 354 { 355 return hso_dev->port_data.dev_serial; 356 } 357 358 /* Debugging functions */ 359 #ifdef DEBUG 360 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 361 unsigned int len) 362 { 363 static char name[255]; 364 365 sprintf(name, "hso[%d:%s]", line_count, func_name); 366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 367 } 368 369 #define DUMP(buf_, len_) \ 370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 371 372 #define DUMP1(buf_, len_) \ 373 do { \ 374 if (0x01 & debug) \ 375 DUMP(buf_, len_); \ 376 } while (0) 377 #else 378 #define DUMP(buf_, len_) 379 #define DUMP1(buf_, len_) 380 #endif 381 382 /* module parameters */ 383 static int debug; 384 static int tty_major; 385 static int disable_net; 386 387 /* driver info */ 388 static const char driver_name[] = "hso"; 389 static const char tty_filename[] = "ttyHS"; 390 static const char *version = __FILE__ ": " MOD_AUTHOR; 391 /* the usb driver itself (registered in hso_init) */ 392 static struct usb_driver hso_driver; 393 /* serial structures */ 394 static struct tty_driver *tty_drv; 395 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 396 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 397 static spinlock_t serial_table_lock; 398 399 static const s32 default_port_spec[] = { 400 HSO_INTF_MUX | HSO_PORT_NETWORK, 401 HSO_INTF_BULK | HSO_PORT_DIAG, 402 HSO_INTF_BULK | HSO_PORT_MODEM, 403 0 404 }; 405 406 static const s32 icon321_port_spec[] = { 407 HSO_INTF_MUX | HSO_PORT_NETWORK, 408 HSO_INTF_BULK | HSO_PORT_DIAG2, 409 HSO_INTF_BULK | HSO_PORT_MODEM, 410 HSO_INTF_BULK | HSO_PORT_DIAG, 411 0 412 }; 413 414 #define default_port_device(vendor, product) \ 415 USB_DEVICE(vendor, product), \ 416 .driver_info = (kernel_ulong_t)default_port_spec 417 418 #define icon321_port_device(vendor, product) \ 419 USB_DEVICE(vendor, product), \ 420 .driver_info = (kernel_ulong_t)icon321_port_spec 421 422 /* list of devices we support */ 423 static const struct usb_device_id hso_ids[] = { 424 {default_port_device(0x0af0, 0x6711)}, 425 {default_port_device(0x0af0, 0x6731)}, 426 {default_port_device(0x0af0, 0x6751)}, 427 {default_port_device(0x0af0, 0x6771)}, 428 {default_port_device(0x0af0, 0x6791)}, 429 {default_port_device(0x0af0, 0x6811)}, 430 {default_port_device(0x0af0, 0x6911)}, 431 {default_port_device(0x0af0, 0x6951)}, 432 {default_port_device(0x0af0, 0x6971)}, 433 {default_port_device(0x0af0, 0x7011)}, 434 {default_port_device(0x0af0, 0x7031)}, 435 {default_port_device(0x0af0, 0x7051)}, 436 {default_port_device(0x0af0, 0x7071)}, 437 {default_port_device(0x0af0, 0x7111)}, 438 {default_port_device(0x0af0, 0x7211)}, 439 {default_port_device(0x0af0, 0x7251)}, 440 {default_port_device(0x0af0, 0x7271)}, 441 {default_port_device(0x0af0, 0x7311)}, 442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 452 {USB_DEVICE(0x0af0, 0x7701)}, 453 {USB_DEVICE(0x0af0, 0x7706)}, 454 {USB_DEVICE(0x0af0, 0x7801)}, 455 {USB_DEVICE(0x0af0, 0x7901)}, 456 {USB_DEVICE(0x0af0, 0x7A01)}, 457 {USB_DEVICE(0x0af0, 0x7A05)}, 458 {USB_DEVICE(0x0af0, 0x8200)}, 459 {USB_DEVICE(0x0af0, 0x8201)}, 460 {USB_DEVICE(0x0af0, 0x8300)}, 461 {USB_DEVICE(0x0af0, 0x8302)}, 462 {USB_DEVICE(0x0af0, 0x8304)}, 463 {USB_DEVICE(0x0af0, 0x8400)}, 464 {USB_DEVICE(0x0af0, 0x8600)}, 465 {USB_DEVICE(0x0af0, 0x8800)}, 466 {USB_DEVICE(0x0af0, 0x8900)}, 467 {USB_DEVICE(0x0af0, 0x9000)}, 468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 469 {USB_DEVICE(0x0af0, 0xd035)}, 470 {USB_DEVICE(0x0af0, 0xd055)}, 471 {USB_DEVICE(0x0af0, 0xd155)}, 472 {USB_DEVICE(0x0af0, 0xd255)}, 473 {USB_DEVICE(0x0af0, 0xd057)}, 474 {USB_DEVICE(0x0af0, 0xd157)}, 475 {USB_DEVICE(0x0af0, 0xd257)}, 476 {USB_DEVICE(0x0af0, 0xd357)}, 477 {USB_DEVICE(0x0af0, 0xd058)}, 478 {USB_DEVICE(0x0af0, 0xc100)}, 479 {} 480 }; 481 MODULE_DEVICE_TABLE(usb, hso_ids); 482 483 /* Sysfs attribute */ 484 static ssize_t hso_sysfs_show_porttype(struct device *dev, 485 struct device_attribute *attr, 486 char *buf) 487 { 488 struct hso_device *hso_dev = dev_get_drvdata(dev); 489 char *port_name; 490 491 if (!hso_dev) 492 return 0; 493 494 switch (hso_dev->port_spec & HSO_PORT_MASK) { 495 case HSO_PORT_CONTROL: 496 port_name = "Control"; 497 break; 498 case HSO_PORT_APP: 499 port_name = "Application"; 500 break; 501 case HSO_PORT_APP2: 502 port_name = "Application2"; 503 break; 504 case HSO_PORT_GPS: 505 port_name = "GPS"; 506 break; 507 case HSO_PORT_GPS_CONTROL: 508 port_name = "GPS Control"; 509 break; 510 case HSO_PORT_PCSC: 511 port_name = "PCSC"; 512 break; 513 case HSO_PORT_DIAG: 514 port_name = "Diagnostic"; 515 break; 516 case HSO_PORT_DIAG2: 517 port_name = "Diagnostic2"; 518 break; 519 case HSO_PORT_MODEM: 520 port_name = "Modem"; 521 break; 522 case HSO_PORT_NETWORK: 523 port_name = "Network"; 524 break; 525 default: 526 port_name = "Unknown"; 527 break; 528 } 529 530 return sprintf(buf, "%s\n", port_name); 531 } 532 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 533 534 static struct attribute *hso_serial_dev_attrs[] = { 535 &dev_attr_hsotype.attr, 536 NULL 537 }; 538 539 ATTRIBUTE_GROUPS(hso_serial_dev); 540 541 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 542 { 543 int idx; 544 545 for (idx = 0; idx < serial->num_rx_urbs; idx++) 546 if (serial->rx_urb[idx] == urb) 547 return idx; 548 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 549 return -1; 550 } 551 552 /* converts mux value to a port spec value */ 553 static u32 hso_mux_to_port(int mux) 554 { 555 u32 result; 556 557 switch (mux) { 558 case 0x1: 559 result = HSO_PORT_CONTROL; 560 break; 561 case 0x2: 562 result = HSO_PORT_APP; 563 break; 564 case 0x4: 565 result = HSO_PORT_PCSC; 566 break; 567 case 0x8: 568 result = HSO_PORT_GPS; 569 break; 570 case 0x10: 571 result = HSO_PORT_APP2; 572 break; 573 default: 574 result = HSO_PORT_NO_PORT; 575 } 576 return result; 577 } 578 579 /* converts port spec value to a mux value */ 580 static u32 hso_port_to_mux(int port) 581 { 582 u32 result; 583 584 switch (port & HSO_PORT_MASK) { 585 case HSO_PORT_CONTROL: 586 result = 0x0; 587 break; 588 case HSO_PORT_APP: 589 result = 0x1; 590 break; 591 case HSO_PORT_PCSC: 592 result = 0x2; 593 break; 594 case HSO_PORT_GPS: 595 result = 0x3; 596 break; 597 case HSO_PORT_APP2: 598 result = 0x4; 599 break; 600 default: 601 result = 0x0; 602 } 603 return result; 604 } 605 606 static struct hso_serial *get_serial_by_shared_int_and_type( 607 struct hso_shared_int *shared_int, 608 int mux) 609 { 610 int i, port; 611 612 port = hso_mux_to_port(mux); 613 614 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 615 if (serial_table[i] && 616 (dev2ser(serial_table[i])->shared_int == shared_int) && 617 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 618 return dev2ser(serial_table[i]); 619 } 620 } 621 622 return NULL; 623 } 624 625 static struct hso_serial *get_serial_by_index(unsigned index) 626 { 627 struct hso_serial *serial = NULL; 628 unsigned long flags; 629 630 spin_lock_irqsave(&serial_table_lock, flags); 631 if (serial_table[index]) 632 serial = dev2ser(serial_table[index]); 633 spin_unlock_irqrestore(&serial_table_lock, flags); 634 635 return serial; 636 } 637 638 static int get_free_serial_index(void) 639 { 640 int index; 641 unsigned long flags; 642 643 spin_lock_irqsave(&serial_table_lock, flags); 644 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 645 if (serial_table[index] == NULL) { 646 spin_unlock_irqrestore(&serial_table_lock, flags); 647 return index; 648 } 649 } 650 spin_unlock_irqrestore(&serial_table_lock, flags); 651 652 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 653 return -1; 654 } 655 656 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 657 { 658 unsigned long flags; 659 660 spin_lock_irqsave(&serial_table_lock, flags); 661 if (serial) 662 serial_table[index] = serial->parent; 663 else 664 serial_table[index] = NULL; 665 spin_unlock_irqrestore(&serial_table_lock, flags); 666 } 667 668 static void handle_usb_error(int status, const char *function, 669 struct hso_device *hso_dev) 670 { 671 char *explanation; 672 673 switch (status) { 674 case -ENODEV: 675 explanation = "no device"; 676 break; 677 case -ENOENT: 678 explanation = "endpoint not enabled"; 679 break; 680 case -EPIPE: 681 explanation = "endpoint stalled"; 682 break; 683 case -ENOSPC: 684 explanation = "not enough bandwidth"; 685 break; 686 case -ESHUTDOWN: 687 explanation = "device disabled"; 688 break; 689 case -EHOSTUNREACH: 690 explanation = "device suspended"; 691 break; 692 case -EINVAL: 693 case -EAGAIN: 694 case -EFBIG: 695 case -EMSGSIZE: 696 explanation = "internal error"; 697 break; 698 case -EILSEQ: 699 case -EPROTO: 700 case -ETIME: 701 case -ETIMEDOUT: 702 explanation = "protocol error"; 703 if (hso_dev) 704 usb_queue_reset_device(hso_dev->interface); 705 break; 706 default: 707 explanation = "unknown status"; 708 break; 709 } 710 711 /* log a meaningful explanation of an USB status */ 712 D1("%s: received USB status - %s (%d)", function, explanation, status); 713 } 714 715 /* Network interface functions */ 716 717 /* called when net interface is brought up by ifconfig */ 718 static int hso_net_open(struct net_device *net) 719 { 720 struct hso_net *odev = netdev_priv(net); 721 unsigned long flags = 0; 722 723 if (!odev) { 724 dev_err(&net->dev, "No net device !\n"); 725 return -ENODEV; 726 } 727 728 odev->skb_tx_buf = NULL; 729 730 /* setup environment */ 731 spin_lock_irqsave(&odev->net_lock, flags); 732 odev->rx_parse_state = WAIT_IP; 733 odev->rx_buf_size = 0; 734 odev->rx_buf_missing = sizeof(struct iphdr); 735 spin_unlock_irqrestore(&odev->net_lock, flags); 736 737 /* We are up and running. */ 738 set_bit(HSO_NET_RUNNING, &odev->flags); 739 hso_start_net_device(odev->parent); 740 741 /* Tell the kernel we are ready to start receiving from it */ 742 netif_start_queue(net); 743 744 return 0; 745 } 746 747 /* called when interface is brought down by ifconfig */ 748 static int hso_net_close(struct net_device *net) 749 { 750 struct hso_net *odev = netdev_priv(net); 751 752 /* we don't need the queue anymore */ 753 netif_stop_queue(net); 754 /* no longer running */ 755 clear_bit(HSO_NET_RUNNING, &odev->flags); 756 757 hso_stop_net_device(odev->parent); 758 759 /* done */ 760 return 0; 761 } 762 763 /* USB tells is xmit done, we should start the netqueue again */ 764 static void write_bulk_callback(struct urb *urb) 765 { 766 struct hso_net *odev = urb->context; 767 int status = urb->status; 768 769 /* Sanity check */ 770 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 771 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 772 return; 773 } 774 775 /* Do we still have a valid kernel network device? */ 776 if (!netif_device_present(odev->net)) { 777 dev_err(&urb->dev->dev, "%s: net device not present\n", 778 __func__); 779 return; 780 } 781 782 /* log status, but don't act on it, we don't need to resubmit anything 783 * anyhow */ 784 if (status) 785 handle_usb_error(status, __func__, odev->parent); 786 787 hso_put_activity(odev->parent); 788 789 /* Tell the network interface we are ready for another frame */ 790 netif_wake_queue(odev->net); 791 } 792 793 /* called by kernel when we need to transmit a packet */ 794 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 795 struct net_device *net) 796 { 797 struct hso_net *odev = netdev_priv(net); 798 int result; 799 800 /* Tell the kernel, "No more frames 'til we are done with this one." */ 801 netif_stop_queue(net); 802 if (hso_get_activity(odev->parent) == -EAGAIN) { 803 odev->skb_tx_buf = skb; 804 return NETDEV_TX_OK; 805 } 806 807 /* log if asked */ 808 DUMP1(skb->data, skb->len); 809 /* Copy it from kernel memory to OUR memory */ 810 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 811 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 812 813 /* Fill in the URB for shipping it out. */ 814 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 815 odev->parent->usb, 816 usb_sndbulkpipe(odev->parent->usb, 817 odev->out_endp-> 818 bEndpointAddress & 0x7F), 819 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 820 odev); 821 822 /* Deal with the Zero Length packet problem, I hope */ 823 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 824 825 /* Send the URB on its merry way. */ 826 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 827 if (result) { 828 dev_warn(&odev->parent->interface->dev, 829 "failed mux_bulk_tx_urb %d\n", result); 830 net->stats.tx_errors++; 831 netif_start_queue(net); 832 } else { 833 net->stats.tx_packets++; 834 net->stats.tx_bytes += skb->len; 835 } 836 dev_kfree_skb(skb); 837 /* we're done */ 838 return NETDEV_TX_OK; 839 } 840 841 static const struct ethtool_ops ops = { 842 .get_link = ethtool_op_get_link 843 }; 844 845 /* called when a packet did not ack after watchdogtimeout */ 846 static void hso_net_tx_timeout(struct net_device *net) 847 { 848 struct hso_net *odev = netdev_priv(net); 849 850 if (!odev) 851 return; 852 853 /* Tell syslog we are hosed. */ 854 dev_warn(&net->dev, "Tx timed out.\n"); 855 856 /* Tear the waiting frame off the list */ 857 if (odev->mux_bulk_tx_urb && 858 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 859 usb_unlink_urb(odev->mux_bulk_tx_urb); 860 861 /* Update statistics */ 862 net->stats.tx_errors++; 863 } 864 865 /* make a real packet from the received USB buffer */ 866 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 867 unsigned int count, unsigned char is_eop) 868 { 869 unsigned short temp_bytes; 870 unsigned short buffer_offset = 0; 871 unsigned short frame_len; 872 unsigned char *tmp_rx_buf; 873 874 /* log if needed */ 875 D1("Rx %d bytes", count); 876 DUMP(ip_pkt, min(128, (int)count)); 877 878 while (count) { 879 switch (odev->rx_parse_state) { 880 case WAIT_IP: 881 /* waiting for IP header. */ 882 /* wanted bytes - size of ip header */ 883 temp_bytes = 884 (count < 885 odev->rx_buf_missing) ? count : odev-> 886 rx_buf_missing; 887 888 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 889 odev->rx_buf_size, ip_pkt + buffer_offset, 890 temp_bytes); 891 892 odev->rx_buf_size += temp_bytes; 893 buffer_offset += temp_bytes; 894 odev->rx_buf_missing -= temp_bytes; 895 count -= temp_bytes; 896 897 if (!odev->rx_buf_missing) { 898 /* header is complete allocate an sk_buffer and 899 * continue to WAIT_DATA */ 900 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 901 902 if ((frame_len > DEFAULT_MRU) || 903 (frame_len < sizeof(struct iphdr))) { 904 dev_err(&odev->net->dev, 905 "Invalid frame (%d) length\n", 906 frame_len); 907 odev->rx_parse_state = WAIT_SYNC; 908 continue; 909 } 910 /* Allocate an sk_buff */ 911 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 912 frame_len); 913 if (!odev->skb_rx_buf) { 914 /* We got no receive buffer. */ 915 D1("could not allocate memory"); 916 odev->rx_parse_state = WAIT_SYNC; 917 continue; 918 } 919 920 /* Copy what we got so far. make room for iphdr 921 * after tail. */ 922 tmp_rx_buf = 923 skb_put(odev->skb_rx_buf, 924 sizeof(struct iphdr)); 925 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 926 sizeof(struct iphdr)); 927 928 /* ETH_HLEN */ 929 odev->rx_buf_size = sizeof(struct iphdr); 930 931 /* Filip actually use .tot_len */ 932 odev->rx_buf_missing = 933 frame_len - sizeof(struct iphdr); 934 odev->rx_parse_state = WAIT_DATA; 935 } 936 break; 937 938 case WAIT_DATA: 939 temp_bytes = (count < odev->rx_buf_missing) 940 ? count : odev->rx_buf_missing; 941 942 /* Copy the rest of the bytes that are left in the 943 * buffer into the waiting sk_buf. */ 944 /* Make room for temp_bytes after tail. */ 945 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 946 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 947 948 odev->rx_buf_missing -= temp_bytes; 949 count -= temp_bytes; 950 buffer_offset += temp_bytes; 951 odev->rx_buf_size += temp_bytes; 952 if (!odev->rx_buf_missing) { 953 /* Packet is complete. Inject into stack. */ 954 /* We have IP packet here */ 955 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 956 skb_reset_mac_header(odev->skb_rx_buf); 957 958 /* Ship it off to the kernel */ 959 netif_rx(odev->skb_rx_buf); 960 /* No longer our buffer. */ 961 odev->skb_rx_buf = NULL; 962 963 /* update out statistics */ 964 odev->net->stats.rx_packets++; 965 966 odev->net->stats.rx_bytes += odev->rx_buf_size; 967 968 odev->rx_buf_size = 0; 969 odev->rx_buf_missing = sizeof(struct iphdr); 970 odev->rx_parse_state = WAIT_IP; 971 } 972 break; 973 974 case WAIT_SYNC: 975 D1(" W_S"); 976 count = 0; 977 break; 978 default: 979 D1(" "); 980 count--; 981 break; 982 } 983 } 984 985 /* Recovery mechanism for WAIT_SYNC state. */ 986 if (is_eop) { 987 if (odev->rx_parse_state == WAIT_SYNC) { 988 odev->rx_parse_state = WAIT_IP; 989 odev->rx_buf_size = 0; 990 odev->rx_buf_missing = sizeof(struct iphdr); 991 } 992 } 993 } 994 995 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 996 { 997 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 998 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 999 1000 if (((rest == 5) || (rest == 6)) && 1001 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 1002 crc_check, 4)) { 1003 urb->actual_length -= 4; 1004 } 1005 } 1006 1007 /* Moving data from usb to kernel (in interrupt state) */ 1008 static void read_bulk_callback(struct urb *urb) 1009 { 1010 struct hso_net *odev = urb->context; 1011 struct net_device *net; 1012 int result; 1013 int status = urb->status; 1014 1015 /* is al ok? (Filip: Who's Al ?) */ 1016 if (status) { 1017 handle_usb_error(status, __func__, odev->parent); 1018 return; 1019 } 1020 1021 /* Sanity check */ 1022 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1023 D1("BULK IN callback but driver is not active!"); 1024 return; 1025 } 1026 usb_mark_last_busy(urb->dev); 1027 1028 net = odev->net; 1029 1030 if (!netif_device_present(net)) { 1031 /* Somebody killed our network interface... */ 1032 return; 1033 } 1034 1035 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1036 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1037 1038 /* do we even have a packet? */ 1039 if (urb->actual_length) { 1040 /* Handle the IP stream, add header and push it onto network 1041 * stack if the packet is complete. */ 1042 spin_lock(&odev->net_lock); 1043 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1044 (urb->transfer_buffer_length > 1045 urb->actual_length) ? 1 : 0); 1046 spin_unlock(&odev->net_lock); 1047 } 1048 1049 /* We are done with this URB, resubmit it. Prep the USB to wait for 1050 * another frame. Reuse same as received. */ 1051 usb_fill_bulk_urb(urb, 1052 odev->parent->usb, 1053 usb_rcvbulkpipe(odev->parent->usb, 1054 odev->in_endp-> 1055 bEndpointAddress & 0x7F), 1056 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1057 read_bulk_callback, odev); 1058 1059 /* Give this to the USB subsystem so it can tell us when more data 1060 * arrives. */ 1061 result = usb_submit_urb(urb, GFP_ATOMIC); 1062 if (result) 1063 dev_warn(&odev->parent->interface->dev, 1064 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1065 result); 1066 } 1067 1068 /* Serial driver functions */ 1069 1070 static void hso_init_termios(struct ktermios *termios) 1071 { 1072 /* 1073 * The default requirements for this device are: 1074 */ 1075 termios->c_iflag &= 1076 ~(IGNBRK /* disable ignore break */ 1077 | BRKINT /* disable break causes interrupt */ 1078 | PARMRK /* disable mark parity errors */ 1079 | ISTRIP /* disable clear high bit of input characters */ 1080 | INLCR /* disable translate NL to CR */ 1081 | IGNCR /* disable ignore CR */ 1082 | ICRNL /* disable translate CR to NL */ 1083 | IXON); /* disable enable XON/XOFF flow control */ 1084 1085 /* disable postprocess output characters */ 1086 termios->c_oflag &= ~OPOST; 1087 1088 termios->c_lflag &= 1089 ~(ECHO /* disable echo input characters */ 1090 | ECHONL /* disable echo new line */ 1091 | ICANON /* disable erase, kill, werase, and rprnt 1092 special characters */ 1093 | ISIG /* disable interrupt, quit, and suspend special 1094 characters */ 1095 | IEXTEN); /* disable non-POSIX special characters */ 1096 1097 termios->c_cflag &= 1098 ~(CSIZE /* no size */ 1099 | PARENB /* disable parity bit */ 1100 | CBAUD /* clear current baud rate */ 1101 | CBAUDEX); /* clear current buad rate */ 1102 1103 termios->c_cflag |= CS8; /* character size 8 bits */ 1104 1105 /* baud rate 115200 */ 1106 tty_termios_encode_baud_rate(termios, 115200, 115200); 1107 } 1108 1109 static void _hso_serial_set_termios(struct tty_struct *tty, 1110 struct ktermios *old) 1111 { 1112 struct hso_serial *serial = tty->driver_data; 1113 1114 if (!serial) { 1115 printk(KERN_ERR "%s: no tty structures", __func__); 1116 return; 1117 } 1118 1119 D4("port %d", serial->minor); 1120 1121 /* 1122 * Fix up unsupported bits 1123 */ 1124 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1125 1126 tty->termios.c_cflag &= 1127 ~(CSIZE /* no size */ 1128 | PARENB /* disable parity bit */ 1129 | CBAUD /* clear current baud rate */ 1130 | CBAUDEX); /* clear current buad rate */ 1131 1132 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1133 1134 /* baud rate 115200 */ 1135 tty_encode_baud_rate(tty, 115200, 115200); 1136 } 1137 1138 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1139 { 1140 int result; 1141 /* We are done with this URB, resubmit it. Prep the USB to wait for 1142 * another frame */ 1143 usb_fill_bulk_urb(urb, serial->parent->usb, 1144 usb_rcvbulkpipe(serial->parent->usb, 1145 serial->in_endp-> 1146 bEndpointAddress & 0x7F), 1147 urb->transfer_buffer, serial->rx_data_length, 1148 hso_std_serial_read_bulk_callback, serial); 1149 /* Give this to the USB subsystem so it can tell us when more data 1150 * arrives. */ 1151 result = usb_submit_urb(urb, GFP_ATOMIC); 1152 if (result) { 1153 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1154 __func__, result); 1155 } 1156 } 1157 1158 1159 1160 1161 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1162 { 1163 int count; 1164 struct urb *curr_urb; 1165 1166 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1167 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1168 count = put_rxbuf_data(curr_urb, serial); 1169 if (count == -1) 1170 return; 1171 if (count == 0) { 1172 serial->curr_rx_urb_idx++; 1173 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1174 serial->curr_rx_urb_idx = 0; 1175 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1176 } 1177 } 1178 } 1179 1180 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1181 { 1182 int count = 0; 1183 struct urb *urb; 1184 1185 urb = serial->rx_urb[0]; 1186 if (serial->port.count > 0) { 1187 count = put_rxbuf_data(urb, serial); 1188 if (count == -1) 1189 return; 1190 } 1191 /* Re issue a read as long as we receive data. */ 1192 1193 if (count == 0 && ((urb->actual_length != 0) || 1194 (serial->rx_state == RX_PENDING))) { 1195 serial->rx_state = RX_SENT; 1196 hso_mux_serial_read(serial); 1197 } else 1198 serial->rx_state = RX_IDLE; 1199 } 1200 1201 1202 /* read callback for Diag and CS port */ 1203 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1204 { 1205 struct hso_serial *serial = urb->context; 1206 int status = urb->status; 1207 1208 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1209 1210 /* sanity check */ 1211 if (!serial) { 1212 D1("serial == NULL"); 1213 return; 1214 } 1215 if (status) { 1216 handle_usb_error(status, __func__, serial->parent); 1217 return; 1218 } 1219 1220 D1("Actual length = %d\n", urb->actual_length); 1221 DUMP1(urb->transfer_buffer, urb->actual_length); 1222 1223 /* Anyone listening? */ 1224 if (serial->port.count == 0) 1225 return; 1226 1227 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1228 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1229 /* Valid data, handle RX data */ 1230 spin_lock(&serial->serial_lock); 1231 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1232 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1233 spin_unlock(&serial->serial_lock); 1234 } 1235 1236 /* 1237 * This needs to be a tasklet otherwise we will 1238 * end up recursively calling this function. 1239 */ 1240 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1241 { 1242 unsigned long flags; 1243 1244 spin_lock_irqsave(&serial->serial_lock, flags); 1245 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1246 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1247 else 1248 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1249 spin_unlock_irqrestore(&serial->serial_lock, flags); 1250 } 1251 1252 static void hso_unthrottle(struct tty_struct *tty) 1253 { 1254 struct hso_serial *serial = tty->driver_data; 1255 1256 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1257 } 1258 1259 /* open the requested serial port */ 1260 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1261 { 1262 struct hso_serial *serial = get_serial_by_index(tty->index); 1263 int result; 1264 1265 /* sanity check */ 1266 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1267 WARN_ON(1); 1268 tty->driver_data = NULL; 1269 D1("Failed to open port"); 1270 return -ENODEV; 1271 } 1272 1273 mutex_lock(&serial->parent->mutex); 1274 result = usb_autopm_get_interface(serial->parent->interface); 1275 if (result < 0) 1276 goto err_out; 1277 1278 D1("Opening %d", serial->minor); 1279 1280 /* setup */ 1281 tty->driver_data = serial; 1282 tty_port_tty_set(&serial->port, tty); 1283 1284 /* check for port already opened, if not set the termios */ 1285 serial->port.count++; 1286 if (serial->port.count == 1) { 1287 serial->rx_state = RX_IDLE; 1288 /* Force default termio settings */ 1289 _hso_serial_set_termios(tty, NULL); 1290 tasklet_init(&serial->unthrottle_tasklet, 1291 (void (*)(unsigned long))hso_unthrottle_tasklet, 1292 (unsigned long)serial); 1293 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1294 if (result) { 1295 hso_stop_serial_device(serial->parent); 1296 serial->port.count--; 1297 } else { 1298 kref_get(&serial->parent->ref); 1299 } 1300 } else { 1301 D1("Port was already open"); 1302 } 1303 1304 usb_autopm_put_interface(serial->parent->interface); 1305 1306 /* done */ 1307 if (result) 1308 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1309 err_out: 1310 mutex_unlock(&serial->parent->mutex); 1311 return result; 1312 } 1313 1314 /* close the requested serial port */ 1315 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1316 { 1317 struct hso_serial *serial = tty->driver_data; 1318 u8 usb_gone; 1319 1320 D1("Closing serial port"); 1321 1322 /* Open failed, no close cleanup required */ 1323 if (serial == NULL) 1324 return; 1325 1326 mutex_lock(&serial->parent->mutex); 1327 usb_gone = serial->parent->usb_gone; 1328 1329 if (!usb_gone) 1330 usb_autopm_get_interface(serial->parent->interface); 1331 1332 /* reset the rts and dtr */ 1333 /* do the actual close */ 1334 serial->port.count--; 1335 1336 if (serial->port.count <= 0) { 1337 serial->port.count = 0; 1338 tty_port_tty_set(&serial->port, NULL); 1339 if (!usb_gone) 1340 hso_stop_serial_device(serial->parent); 1341 tasklet_kill(&serial->unthrottle_tasklet); 1342 } 1343 1344 if (!usb_gone) 1345 usb_autopm_put_interface(serial->parent->interface); 1346 1347 mutex_unlock(&serial->parent->mutex); 1348 } 1349 1350 /* close the requested serial port */ 1351 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1352 int count) 1353 { 1354 struct hso_serial *serial = tty->driver_data; 1355 int space, tx_bytes; 1356 unsigned long flags; 1357 1358 /* sanity check */ 1359 if (serial == NULL) { 1360 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1361 return -ENODEV; 1362 } 1363 1364 spin_lock_irqsave(&serial->serial_lock, flags); 1365 1366 space = serial->tx_data_length - serial->tx_buffer_count; 1367 tx_bytes = (count < space) ? count : space; 1368 1369 if (!tx_bytes) 1370 goto out; 1371 1372 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1373 serial->tx_buffer_count += tx_bytes; 1374 1375 out: 1376 spin_unlock_irqrestore(&serial->serial_lock, flags); 1377 1378 hso_kick_transmit(serial); 1379 /* done */ 1380 return tx_bytes; 1381 } 1382 1383 /* how much room is there for writing */ 1384 static int hso_serial_write_room(struct tty_struct *tty) 1385 { 1386 struct hso_serial *serial = tty->driver_data; 1387 int room; 1388 unsigned long flags; 1389 1390 spin_lock_irqsave(&serial->serial_lock, flags); 1391 room = serial->tx_data_length - serial->tx_buffer_count; 1392 spin_unlock_irqrestore(&serial->serial_lock, flags); 1393 1394 /* return free room */ 1395 return room; 1396 } 1397 1398 static void hso_serial_cleanup(struct tty_struct *tty) 1399 { 1400 struct hso_serial *serial = tty->driver_data; 1401 1402 if (!serial) 1403 return; 1404 1405 kref_put(&serial->parent->ref, hso_serial_ref_free); 1406 } 1407 1408 /* setup the term */ 1409 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1410 { 1411 struct hso_serial *serial = tty->driver_data; 1412 unsigned long flags; 1413 1414 if (old) 1415 D5("Termios called with: cflags new[%d] - old[%d]", 1416 tty->termios.c_cflag, old->c_cflag); 1417 1418 /* the actual setup */ 1419 spin_lock_irqsave(&serial->serial_lock, flags); 1420 if (serial->port.count) 1421 _hso_serial_set_termios(tty, old); 1422 else 1423 tty->termios = *old; 1424 spin_unlock_irqrestore(&serial->serial_lock, flags); 1425 1426 /* done */ 1427 } 1428 1429 /* how many characters in the buffer */ 1430 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1431 { 1432 struct hso_serial *serial = tty->driver_data; 1433 int chars; 1434 unsigned long flags; 1435 1436 /* sanity check */ 1437 if (serial == NULL) 1438 return 0; 1439 1440 spin_lock_irqsave(&serial->serial_lock, flags); 1441 chars = serial->tx_buffer_count; 1442 spin_unlock_irqrestore(&serial->serial_lock, flags); 1443 1444 return chars; 1445 } 1446 static int tiocmget_submit_urb(struct hso_serial *serial, 1447 struct hso_tiocmget *tiocmget, 1448 struct usb_device *usb) 1449 { 1450 int result; 1451 1452 if (serial->parent->usb_gone) 1453 return -ENODEV; 1454 usb_fill_int_urb(tiocmget->urb, usb, 1455 usb_rcvintpipe(usb, 1456 tiocmget->endp-> 1457 bEndpointAddress & 0x7F), 1458 &tiocmget->serial_state_notification, 1459 sizeof(struct hso_serial_state_notification), 1460 tiocmget_intr_callback, serial, 1461 tiocmget->endp->bInterval); 1462 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1463 if (result) { 1464 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1465 result); 1466 } 1467 return result; 1468 1469 } 1470 1471 static void tiocmget_intr_callback(struct urb *urb) 1472 { 1473 struct hso_serial *serial = urb->context; 1474 struct hso_tiocmget *tiocmget; 1475 int status = urb->status; 1476 u16 UART_state_bitmap, prev_UART_state_bitmap; 1477 struct uart_icount *icount; 1478 struct hso_serial_state_notification *serial_state_notification; 1479 struct usb_device *usb; 1480 int if_num; 1481 1482 /* Sanity checks */ 1483 if (!serial) 1484 return; 1485 if (status) { 1486 handle_usb_error(status, __func__, serial->parent); 1487 return; 1488 } 1489 1490 /* tiocmget is only supported on HSO_PORT_MODEM */ 1491 tiocmget = serial->tiocmget; 1492 if (!tiocmget) 1493 return; 1494 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1495 1496 usb = serial->parent->usb; 1497 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1498 1499 /* wIndex should be the USB interface number of the port to which the 1500 * notification applies, which should always be the Modem port. 1501 */ 1502 serial_state_notification = &tiocmget->serial_state_notification; 1503 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1504 serial_state_notification->bNotification != B_NOTIFICATION || 1505 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1506 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1507 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1508 dev_warn(&usb->dev, 1509 "hso received invalid serial state notification\n"); 1510 DUMP(serial_state_notification, 1511 sizeof(struct hso_serial_state_notification)); 1512 } else { 1513 1514 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1515 UART_state_bitmap); 1516 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1517 icount = &tiocmget->icount; 1518 spin_lock(&serial->serial_lock); 1519 if ((UART_state_bitmap & B_OVERRUN) != 1520 (prev_UART_state_bitmap & B_OVERRUN)) 1521 icount->parity++; 1522 if ((UART_state_bitmap & B_PARITY) != 1523 (prev_UART_state_bitmap & B_PARITY)) 1524 icount->parity++; 1525 if ((UART_state_bitmap & B_FRAMING) != 1526 (prev_UART_state_bitmap & B_FRAMING)) 1527 icount->frame++; 1528 if ((UART_state_bitmap & B_RING_SIGNAL) && 1529 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1530 icount->rng++; 1531 if ((UART_state_bitmap & B_BREAK) != 1532 (prev_UART_state_bitmap & B_BREAK)) 1533 icount->brk++; 1534 if ((UART_state_bitmap & B_TX_CARRIER) != 1535 (prev_UART_state_bitmap & B_TX_CARRIER)) 1536 icount->dsr++; 1537 if ((UART_state_bitmap & B_RX_CARRIER) != 1538 (prev_UART_state_bitmap & B_RX_CARRIER)) 1539 icount->dcd++; 1540 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1541 spin_unlock(&serial->serial_lock); 1542 tiocmget->intr_completed = 1; 1543 wake_up_interruptible(&tiocmget->waitq); 1544 } 1545 memset(serial_state_notification, 0, 1546 sizeof(struct hso_serial_state_notification)); 1547 tiocmget_submit_urb(serial, 1548 tiocmget, 1549 serial->parent->usb); 1550 } 1551 1552 /* 1553 * next few functions largely stolen from drivers/serial/serial_core.c 1554 */ 1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1556 * - mask passed in arg for lines of interest 1557 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1558 * Caller should use TIOCGICOUNT to see which one it was 1559 */ 1560 static int 1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1562 { 1563 DECLARE_WAITQUEUE(wait, current); 1564 struct uart_icount cprev, cnow; 1565 struct hso_tiocmget *tiocmget; 1566 int ret; 1567 1568 tiocmget = serial->tiocmget; 1569 if (!tiocmget) 1570 return -ENOENT; 1571 /* 1572 * note the counters on entry 1573 */ 1574 spin_lock_irq(&serial->serial_lock); 1575 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1576 spin_unlock_irq(&serial->serial_lock); 1577 add_wait_queue(&tiocmget->waitq, &wait); 1578 for (;;) { 1579 spin_lock_irq(&serial->serial_lock); 1580 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1581 spin_unlock_irq(&serial->serial_lock); 1582 set_current_state(TASK_INTERRUPTIBLE); 1583 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1584 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1585 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1586 ret = 0; 1587 break; 1588 } 1589 schedule(); 1590 /* see if a signal did it */ 1591 if (signal_pending(current)) { 1592 ret = -ERESTARTSYS; 1593 break; 1594 } 1595 cprev = cnow; 1596 } 1597 __set_current_state(TASK_RUNNING); 1598 remove_wait_queue(&tiocmget->waitq, &wait); 1599 1600 return ret; 1601 } 1602 1603 /* 1604 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1605 * Return: write counters to the user passed counter struct 1606 * NB: both 1->0 and 0->1 transitions are counted except for 1607 * RI where only 0->1 is counted. 1608 */ 1609 static int hso_get_count(struct tty_struct *tty, 1610 struct serial_icounter_struct *icount) 1611 { 1612 struct uart_icount cnow; 1613 struct hso_serial *serial = tty->driver_data; 1614 struct hso_tiocmget *tiocmget = serial->tiocmget; 1615 1616 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1617 1618 if (!tiocmget) 1619 return -ENOENT; 1620 spin_lock_irq(&serial->serial_lock); 1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1622 spin_unlock_irq(&serial->serial_lock); 1623 1624 icount->cts = cnow.cts; 1625 icount->dsr = cnow.dsr; 1626 icount->rng = cnow.rng; 1627 icount->dcd = cnow.dcd; 1628 icount->rx = cnow.rx; 1629 icount->tx = cnow.tx; 1630 icount->frame = cnow.frame; 1631 icount->overrun = cnow.overrun; 1632 icount->parity = cnow.parity; 1633 icount->brk = cnow.brk; 1634 icount->buf_overrun = cnow.buf_overrun; 1635 1636 return 0; 1637 } 1638 1639 1640 static int hso_serial_tiocmget(struct tty_struct *tty) 1641 { 1642 int retval; 1643 struct hso_serial *serial = tty->driver_data; 1644 struct hso_tiocmget *tiocmget; 1645 u16 UART_state_bitmap; 1646 1647 /* sanity check */ 1648 if (!serial) { 1649 D1("no tty structures"); 1650 return -EINVAL; 1651 } 1652 spin_lock_irq(&serial->serial_lock); 1653 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1654 ((serial->dtr_state) ? TIOCM_DTR : 0); 1655 tiocmget = serial->tiocmget; 1656 if (tiocmget) { 1657 1658 UART_state_bitmap = le16_to_cpu( 1659 tiocmget->prev_UART_state_bitmap); 1660 if (UART_state_bitmap & B_RING_SIGNAL) 1661 retval |= TIOCM_RNG; 1662 if (UART_state_bitmap & B_RX_CARRIER) 1663 retval |= TIOCM_CD; 1664 if (UART_state_bitmap & B_TX_CARRIER) 1665 retval |= TIOCM_DSR; 1666 } 1667 spin_unlock_irq(&serial->serial_lock); 1668 return retval; 1669 } 1670 1671 static int hso_serial_tiocmset(struct tty_struct *tty, 1672 unsigned int set, unsigned int clear) 1673 { 1674 int val = 0; 1675 unsigned long flags; 1676 int if_num; 1677 struct hso_serial *serial = tty->driver_data; 1678 1679 /* sanity check */ 1680 if (!serial) { 1681 D1("no tty structures"); 1682 return -EINVAL; 1683 } 1684 1685 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1686 return -EINVAL; 1687 1688 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1689 1690 spin_lock_irqsave(&serial->serial_lock, flags); 1691 if (set & TIOCM_RTS) 1692 serial->rts_state = 1; 1693 if (set & TIOCM_DTR) 1694 serial->dtr_state = 1; 1695 1696 if (clear & TIOCM_RTS) 1697 serial->rts_state = 0; 1698 if (clear & TIOCM_DTR) 1699 serial->dtr_state = 0; 1700 1701 if (serial->dtr_state) 1702 val |= 0x01; 1703 if (serial->rts_state) 1704 val |= 0x02; 1705 1706 spin_unlock_irqrestore(&serial->serial_lock, flags); 1707 1708 return usb_control_msg(serial->parent->usb, 1709 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1710 0x21, val, if_num, NULL, 0, 1711 USB_CTRL_SET_TIMEOUT); 1712 } 1713 1714 static int hso_serial_ioctl(struct tty_struct *tty, 1715 unsigned int cmd, unsigned long arg) 1716 { 1717 struct hso_serial *serial = tty->driver_data; 1718 int ret = 0; 1719 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1720 1721 if (!serial) 1722 return -ENODEV; 1723 switch (cmd) { 1724 case TIOCMIWAIT: 1725 ret = hso_wait_modem_status(serial, arg); 1726 break; 1727 default: 1728 ret = -ENOIOCTLCMD; 1729 break; 1730 } 1731 return ret; 1732 } 1733 1734 1735 /* starts a transmit */ 1736 static void hso_kick_transmit(struct hso_serial *serial) 1737 { 1738 u8 *temp; 1739 unsigned long flags; 1740 int res; 1741 1742 spin_lock_irqsave(&serial->serial_lock, flags); 1743 if (!serial->tx_buffer_count) 1744 goto out; 1745 1746 if (serial->tx_urb_used) 1747 goto out; 1748 1749 /* Wakeup USB interface if necessary */ 1750 if (hso_get_activity(serial->parent) == -EAGAIN) 1751 goto out; 1752 1753 /* Switch pointers around to avoid memcpy */ 1754 temp = serial->tx_buffer; 1755 serial->tx_buffer = serial->tx_data; 1756 serial->tx_data = temp; 1757 serial->tx_data_count = serial->tx_buffer_count; 1758 serial->tx_buffer_count = 0; 1759 1760 /* If temp is set, it means we switched buffers */ 1761 if (temp && serial->write_data) { 1762 res = serial->write_data(serial); 1763 if (res >= 0) 1764 serial->tx_urb_used = 1; 1765 } 1766 out: 1767 spin_unlock_irqrestore(&serial->serial_lock, flags); 1768 } 1769 1770 /* make a request (for reading and writing data to muxed serial port) */ 1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1772 struct urb *ctrl_urb, 1773 struct usb_ctrlrequest *ctrl_req, 1774 u8 *ctrl_urb_data, u32 size) 1775 { 1776 int result; 1777 int pipe; 1778 1779 /* Sanity check */ 1780 if (!serial || !ctrl_urb || !ctrl_req) { 1781 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1782 return -EINVAL; 1783 } 1784 1785 /* initialize */ 1786 ctrl_req->wValue = 0; 1787 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1788 ctrl_req->wLength = cpu_to_le16(size); 1789 1790 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1791 /* Reading command */ 1792 ctrl_req->bRequestType = USB_DIR_IN | 1793 USB_TYPE_OPTION_VENDOR | 1794 USB_RECIP_INTERFACE; 1795 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1796 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1797 } else { 1798 /* Writing command */ 1799 ctrl_req->bRequestType = USB_DIR_OUT | 1800 USB_TYPE_OPTION_VENDOR | 1801 USB_RECIP_INTERFACE; 1802 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1803 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1804 } 1805 /* syslog */ 1806 D2("%s command (%02x) len: %d, port: %d", 1807 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1808 ctrl_req->bRequestType, ctrl_req->wLength, port); 1809 1810 /* Load ctrl urb */ 1811 ctrl_urb->transfer_flags = 0; 1812 usb_fill_control_urb(ctrl_urb, 1813 serial->parent->usb, 1814 pipe, 1815 (u8 *) ctrl_req, 1816 ctrl_urb_data, size, ctrl_callback, serial); 1817 /* Send it on merry way */ 1818 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1819 if (result) { 1820 dev_err(&ctrl_urb->dev->dev, 1821 "%s failed submit ctrl_urb %d type %d\n", __func__, 1822 result, type); 1823 return result; 1824 } 1825 1826 /* done */ 1827 return size; 1828 } 1829 1830 /* called by intr_callback when read occurs */ 1831 static int hso_mux_serial_read(struct hso_serial *serial) 1832 { 1833 if (!serial) 1834 return -EINVAL; 1835 1836 /* clean data */ 1837 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1838 /* make the request */ 1839 1840 if (serial->num_rx_urbs != 1) { 1841 dev_err(&serial->parent->interface->dev, 1842 "ERROR: mux'd reads with multiple buffers " 1843 "not possible\n"); 1844 return 0; 1845 } 1846 return mux_device_request(serial, 1847 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1848 serial->parent->port_spec & HSO_PORT_MASK, 1849 serial->rx_urb[0], 1850 &serial->ctrl_req_rx, 1851 serial->rx_data[0], serial->rx_data_length); 1852 } 1853 1854 /* used for muxed serial port callback (muxed serial read) */ 1855 static void intr_callback(struct urb *urb) 1856 { 1857 struct hso_shared_int *shared_int = urb->context; 1858 struct hso_serial *serial; 1859 unsigned char *port_req; 1860 int status = urb->status; 1861 int i; 1862 1863 usb_mark_last_busy(urb->dev); 1864 1865 /* sanity check */ 1866 if (!shared_int) 1867 return; 1868 1869 /* status check */ 1870 if (status) { 1871 handle_usb_error(status, __func__, NULL); 1872 return; 1873 } 1874 D4("\n--- Got intr callback 0x%02X ---", status); 1875 1876 /* what request? */ 1877 port_req = urb->transfer_buffer; 1878 D4(" port_req = 0x%.2X\n", *port_req); 1879 /* loop over all muxed ports to find the one sending this */ 1880 for (i = 0; i < 8; i++) { 1881 /* max 8 channels on MUX */ 1882 if (*port_req & (1 << i)) { 1883 serial = get_serial_by_shared_int_and_type(shared_int, 1884 (1 << i)); 1885 if (serial != NULL) { 1886 D1("Pending read interrupt on port %d\n", i); 1887 spin_lock(&serial->serial_lock); 1888 if (serial->rx_state == RX_IDLE && 1889 serial->port.count > 0) { 1890 /* Setup and send a ctrl req read on 1891 * port i */ 1892 if (!serial->rx_urb_filled[0]) { 1893 serial->rx_state = RX_SENT; 1894 hso_mux_serial_read(serial); 1895 } else 1896 serial->rx_state = RX_PENDING; 1897 } else { 1898 D1("Already a read pending on " 1899 "port %d or port not open\n", i); 1900 } 1901 spin_unlock(&serial->serial_lock); 1902 } 1903 } 1904 } 1905 /* Resubmit interrupt urb */ 1906 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1907 } 1908 1909 /* called for writing to muxed serial port */ 1910 static int hso_mux_serial_write_data(struct hso_serial *serial) 1911 { 1912 if (NULL == serial) 1913 return -EINVAL; 1914 1915 return mux_device_request(serial, 1916 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1917 serial->parent->port_spec & HSO_PORT_MASK, 1918 serial->tx_urb, 1919 &serial->ctrl_req_tx, 1920 serial->tx_data, serial->tx_data_count); 1921 } 1922 1923 /* write callback for Diag and CS port */ 1924 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1925 { 1926 struct hso_serial *serial = urb->context; 1927 int status = urb->status; 1928 1929 /* sanity check */ 1930 if (!serial) { 1931 D1("serial == NULL"); 1932 return; 1933 } 1934 1935 spin_lock(&serial->serial_lock); 1936 serial->tx_urb_used = 0; 1937 spin_unlock(&serial->serial_lock); 1938 if (status) { 1939 handle_usb_error(status, __func__, serial->parent); 1940 return; 1941 } 1942 hso_put_activity(serial->parent); 1943 tty_port_tty_wakeup(&serial->port); 1944 hso_kick_transmit(serial); 1945 1946 D1(" "); 1947 } 1948 1949 /* called for writing diag or CS serial port */ 1950 static int hso_std_serial_write_data(struct hso_serial *serial) 1951 { 1952 int count = serial->tx_data_count; 1953 int result; 1954 1955 usb_fill_bulk_urb(serial->tx_urb, 1956 serial->parent->usb, 1957 usb_sndbulkpipe(serial->parent->usb, 1958 serial->out_endp-> 1959 bEndpointAddress & 0x7F), 1960 serial->tx_data, serial->tx_data_count, 1961 hso_std_serial_write_bulk_callback, serial); 1962 1963 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1964 if (result) { 1965 dev_warn(&serial->parent->usb->dev, 1966 "Failed to submit urb - res %d\n", result); 1967 return result; 1968 } 1969 1970 return count; 1971 } 1972 1973 /* callback after read or write on muxed serial port */ 1974 static void ctrl_callback(struct urb *urb) 1975 { 1976 struct hso_serial *serial = urb->context; 1977 struct usb_ctrlrequest *req; 1978 int status = urb->status; 1979 1980 /* sanity check */ 1981 if (!serial) 1982 return; 1983 1984 spin_lock(&serial->serial_lock); 1985 serial->tx_urb_used = 0; 1986 spin_unlock(&serial->serial_lock); 1987 if (status) { 1988 handle_usb_error(status, __func__, serial->parent); 1989 return; 1990 } 1991 1992 /* what request? */ 1993 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1994 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1995 D4("Actual length of urb = %d\n", urb->actual_length); 1996 DUMP1(urb->transfer_buffer, urb->actual_length); 1997 1998 if (req->bRequestType == 1999 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2000 /* response to a read command */ 2001 serial->rx_urb_filled[0] = 1; 2002 spin_lock(&serial->serial_lock); 2003 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2004 spin_unlock(&serial->serial_lock); 2005 } else { 2006 hso_put_activity(serial->parent); 2007 tty_port_tty_wakeup(&serial->port); 2008 /* response to a write command */ 2009 hso_kick_transmit(serial); 2010 } 2011 } 2012 2013 /* handle RX data for serial port */ 2014 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2015 { 2016 struct tty_struct *tty; 2017 int count; 2018 2019 /* Sanity check */ 2020 if (urb == NULL || serial == NULL) { 2021 D1("serial = NULL"); 2022 return -2; 2023 } 2024 2025 tty = tty_port_tty_get(&serial->port); 2026 2027 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { 2028 tty_kref_put(tty); 2029 return -1; 2030 } 2031 2032 /* Push data to tty */ 2033 D1("data to push to tty"); 2034 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2035 if (count >= urb->actual_length) { 2036 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2037 urb->actual_length); 2038 tty_flip_buffer_push(&serial->port); 2039 } else { 2040 dev_warn(&serial->parent->usb->dev, 2041 "dropping data, %d bytes lost\n", urb->actual_length); 2042 } 2043 2044 tty_kref_put(tty); 2045 2046 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2047 2048 return 0; 2049 } 2050 2051 2052 /* Base driver functions */ 2053 2054 static void hso_log_port(struct hso_device *hso_dev) 2055 { 2056 char *port_type; 2057 char port_dev[20]; 2058 2059 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2060 case HSO_PORT_CONTROL: 2061 port_type = "Control"; 2062 break; 2063 case HSO_PORT_APP: 2064 port_type = "Application"; 2065 break; 2066 case HSO_PORT_GPS: 2067 port_type = "GPS"; 2068 break; 2069 case HSO_PORT_GPS_CONTROL: 2070 port_type = "GPS control"; 2071 break; 2072 case HSO_PORT_APP2: 2073 port_type = "Application2"; 2074 break; 2075 case HSO_PORT_PCSC: 2076 port_type = "PCSC"; 2077 break; 2078 case HSO_PORT_DIAG: 2079 port_type = "Diagnostic"; 2080 break; 2081 case HSO_PORT_DIAG2: 2082 port_type = "Diagnostic2"; 2083 break; 2084 case HSO_PORT_MODEM: 2085 port_type = "Modem"; 2086 break; 2087 case HSO_PORT_NETWORK: 2088 port_type = "Network"; 2089 break; 2090 default: 2091 port_type = "Unknown"; 2092 break; 2093 } 2094 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2095 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2096 } else 2097 sprintf(port_dev, "/dev/%s%d", tty_filename, 2098 dev2ser(hso_dev)->minor); 2099 2100 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2101 port_type, port_dev); 2102 } 2103 2104 static int hso_start_net_device(struct hso_device *hso_dev) 2105 { 2106 int i, result = 0; 2107 struct hso_net *hso_net = dev2net(hso_dev); 2108 2109 if (!hso_net) 2110 return -ENODEV; 2111 2112 /* send URBs for all read buffers */ 2113 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2114 2115 /* Prep a receive URB */ 2116 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2117 hso_dev->usb, 2118 usb_rcvbulkpipe(hso_dev->usb, 2119 hso_net->in_endp-> 2120 bEndpointAddress & 0x7F), 2121 hso_net->mux_bulk_rx_buf_pool[i], 2122 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2123 hso_net); 2124 2125 /* Put it out there so the device can send us stuff */ 2126 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2127 GFP_NOIO); 2128 if (result) 2129 dev_warn(&hso_dev->usb->dev, 2130 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2131 i, result); 2132 } 2133 2134 return result; 2135 } 2136 2137 static int hso_stop_net_device(struct hso_device *hso_dev) 2138 { 2139 int i; 2140 struct hso_net *hso_net = dev2net(hso_dev); 2141 2142 if (!hso_net) 2143 return -ENODEV; 2144 2145 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2146 if (hso_net->mux_bulk_rx_urb_pool[i]) 2147 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2148 2149 } 2150 if (hso_net->mux_bulk_tx_urb) 2151 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2152 2153 return 0; 2154 } 2155 2156 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2157 { 2158 int i, result = 0; 2159 struct hso_serial *serial = dev2ser(hso_dev); 2160 2161 if (!serial) 2162 return -ENODEV; 2163 2164 /* If it is not the MUX port fill in and submit a bulk urb (already 2165 * allocated in hso_serial_start) */ 2166 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2167 for (i = 0; i < serial->num_rx_urbs; i++) { 2168 usb_fill_bulk_urb(serial->rx_urb[i], 2169 serial->parent->usb, 2170 usb_rcvbulkpipe(serial->parent->usb, 2171 serial->in_endp-> 2172 bEndpointAddress & 2173 0x7F), 2174 serial->rx_data[i], 2175 serial->rx_data_length, 2176 hso_std_serial_read_bulk_callback, 2177 serial); 2178 result = usb_submit_urb(serial->rx_urb[i], flags); 2179 if (result) { 2180 dev_warn(&serial->parent->usb->dev, 2181 "Failed to submit urb - res %d\n", 2182 result); 2183 break; 2184 } 2185 } 2186 } else { 2187 mutex_lock(&serial->shared_int->shared_int_lock); 2188 if (!serial->shared_int->use_count) { 2189 result = 2190 hso_mux_submit_intr_urb(serial->shared_int, 2191 hso_dev->usb, flags); 2192 } 2193 serial->shared_int->use_count++; 2194 mutex_unlock(&serial->shared_int->shared_int_lock); 2195 } 2196 if (serial->tiocmget) 2197 tiocmget_submit_urb(serial, 2198 serial->tiocmget, 2199 serial->parent->usb); 2200 return result; 2201 } 2202 2203 static int hso_stop_serial_device(struct hso_device *hso_dev) 2204 { 2205 int i; 2206 struct hso_serial *serial = dev2ser(hso_dev); 2207 struct hso_tiocmget *tiocmget; 2208 2209 if (!serial) 2210 return -ENODEV; 2211 2212 for (i = 0; i < serial->num_rx_urbs; i++) { 2213 if (serial->rx_urb[i]) { 2214 usb_kill_urb(serial->rx_urb[i]); 2215 serial->rx_urb_filled[i] = 0; 2216 } 2217 } 2218 serial->curr_rx_urb_idx = 0; 2219 2220 if (serial->tx_urb) 2221 usb_kill_urb(serial->tx_urb); 2222 2223 if (serial->shared_int) { 2224 mutex_lock(&serial->shared_int->shared_int_lock); 2225 if (serial->shared_int->use_count && 2226 (--serial->shared_int->use_count == 0)) { 2227 struct urb *urb; 2228 2229 urb = serial->shared_int->shared_intr_urb; 2230 if (urb) 2231 usb_kill_urb(urb); 2232 } 2233 mutex_unlock(&serial->shared_int->shared_int_lock); 2234 } 2235 tiocmget = serial->tiocmget; 2236 if (tiocmget) { 2237 wake_up_interruptible(&tiocmget->waitq); 2238 usb_kill_urb(tiocmget->urb); 2239 } 2240 2241 return 0; 2242 } 2243 2244 static void hso_serial_tty_unregister(struct hso_serial *serial) 2245 { 2246 tty_unregister_device(tty_drv, serial->minor); 2247 } 2248 2249 static void hso_serial_common_free(struct hso_serial *serial) 2250 { 2251 int i; 2252 2253 for (i = 0; i < serial->num_rx_urbs; i++) { 2254 /* unlink and free RX URB */ 2255 usb_free_urb(serial->rx_urb[i]); 2256 /* free the RX buffer */ 2257 kfree(serial->rx_data[i]); 2258 } 2259 2260 /* unlink and free TX URB */ 2261 usb_free_urb(serial->tx_urb); 2262 kfree(serial->tx_buffer); 2263 kfree(serial->tx_data); 2264 tty_port_destroy(&serial->port); 2265 } 2266 2267 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2268 int rx_size, int tx_size) 2269 { 2270 struct device *dev; 2271 int minor; 2272 int i; 2273 2274 tty_port_init(&serial->port); 2275 2276 minor = get_free_serial_index(); 2277 if (minor < 0) 2278 goto exit; 2279 2280 /* register our minor number */ 2281 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2282 tty_drv, minor, &serial->parent->interface->dev, 2283 serial->parent, hso_serial_dev_groups); 2284 dev = serial->parent->dev; 2285 2286 /* fill in specific data for later use */ 2287 serial->minor = minor; 2288 serial->magic = HSO_SERIAL_MAGIC; 2289 spin_lock_init(&serial->serial_lock); 2290 serial->num_rx_urbs = num_urbs; 2291 2292 /* RX, allocate urb and initialize */ 2293 2294 /* prepare our RX buffer */ 2295 serial->rx_data_length = rx_size; 2296 for (i = 0; i < serial->num_rx_urbs; i++) { 2297 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2298 if (!serial->rx_urb[i]) { 2299 dev_err(dev, "Could not allocate urb?\n"); 2300 goto exit; 2301 } 2302 serial->rx_urb[i]->transfer_buffer = NULL; 2303 serial->rx_urb[i]->transfer_buffer_length = 0; 2304 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2305 GFP_KERNEL); 2306 if (!serial->rx_data[i]) 2307 goto exit; 2308 } 2309 2310 /* TX, allocate urb and initialize */ 2311 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2312 if (!serial->tx_urb) { 2313 dev_err(dev, "Could not allocate urb?\n"); 2314 goto exit; 2315 } 2316 serial->tx_urb->transfer_buffer = NULL; 2317 serial->tx_urb->transfer_buffer_length = 0; 2318 /* prepare our TX buffer */ 2319 serial->tx_data_count = 0; 2320 serial->tx_buffer_count = 0; 2321 serial->tx_data_length = tx_size; 2322 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2323 if (!serial->tx_data) 2324 goto exit; 2325 2326 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2327 if (!serial->tx_buffer) 2328 goto exit; 2329 2330 return 0; 2331 exit: 2332 hso_serial_tty_unregister(serial); 2333 hso_serial_common_free(serial); 2334 return -1; 2335 } 2336 2337 /* Creates a general hso device */ 2338 static struct hso_device *hso_create_device(struct usb_interface *intf, 2339 int port_spec) 2340 { 2341 struct hso_device *hso_dev; 2342 2343 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2344 if (!hso_dev) 2345 return NULL; 2346 2347 hso_dev->port_spec = port_spec; 2348 hso_dev->usb = interface_to_usbdev(intf); 2349 hso_dev->interface = intf; 2350 kref_init(&hso_dev->ref); 2351 mutex_init(&hso_dev->mutex); 2352 2353 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2354 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2355 2356 return hso_dev; 2357 } 2358 2359 /* Removes a network device in the network device table */ 2360 static int remove_net_device(struct hso_device *hso_dev) 2361 { 2362 int i; 2363 2364 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2365 if (network_table[i] == hso_dev) { 2366 network_table[i] = NULL; 2367 break; 2368 } 2369 } 2370 if (i == HSO_MAX_NET_DEVICES) 2371 return -1; 2372 return 0; 2373 } 2374 2375 /* Frees our network device */ 2376 static void hso_free_net_device(struct hso_device *hso_dev) 2377 { 2378 int i; 2379 struct hso_net *hso_net = dev2net(hso_dev); 2380 2381 if (!hso_net) 2382 return; 2383 2384 remove_net_device(hso_net->parent); 2385 2386 if (hso_net->net) 2387 unregister_netdev(hso_net->net); 2388 2389 /* start freeing */ 2390 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2391 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2392 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2393 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2394 } 2395 usb_free_urb(hso_net->mux_bulk_tx_urb); 2396 kfree(hso_net->mux_bulk_tx_buf); 2397 hso_net->mux_bulk_tx_buf = NULL; 2398 2399 if (hso_net->net) 2400 free_netdev(hso_net->net); 2401 2402 kfree(hso_dev); 2403 } 2404 2405 static const struct net_device_ops hso_netdev_ops = { 2406 .ndo_open = hso_net_open, 2407 .ndo_stop = hso_net_close, 2408 .ndo_start_xmit = hso_net_start_xmit, 2409 .ndo_tx_timeout = hso_net_tx_timeout, 2410 }; 2411 2412 /* initialize the network interface */ 2413 static void hso_net_init(struct net_device *net) 2414 { 2415 struct hso_net *hso_net = netdev_priv(net); 2416 2417 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2418 2419 /* fill in the other fields */ 2420 net->netdev_ops = &hso_netdev_ops; 2421 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2422 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2423 net->type = ARPHRD_NONE; 2424 net->mtu = DEFAULT_MTU - 14; 2425 net->tx_queue_len = 10; 2426 net->ethtool_ops = &ops; 2427 2428 /* and initialize the semaphore */ 2429 spin_lock_init(&hso_net->net_lock); 2430 } 2431 2432 /* Adds a network device in the network device table */ 2433 static int add_net_device(struct hso_device *hso_dev) 2434 { 2435 int i; 2436 2437 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2438 if (network_table[i] == NULL) { 2439 network_table[i] = hso_dev; 2440 break; 2441 } 2442 } 2443 if (i == HSO_MAX_NET_DEVICES) 2444 return -1; 2445 return 0; 2446 } 2447 2448 static int hso_rfkill_set_block(void *data, bool blocked) 2449 { 2450 struct hso_device *hso_dev = data; 2451 int enabled = !blocked; 2452 int rv; 2453 2454 mutex_lock(&hso_dev->mutex); 2455 if (hso_dev->usb_gone) 2456 rv = 0; 2457 else 2458 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2459 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2460 USB_CTRL_SET_TIMEOUT); 2461 mutex_unlock(&hso_dev->mutex); 2462 return rv; 2463 } 2464 2465 static const struct rfkill_ops hso_rfkill_ops = { 2466 .set_block = hso_rfkill_set_block, 2467 }; 2468 2469 /* Creates and sets up everything for rfkill */ 2470 static void hso_create_rfkill(struct hso_device *hso_dev, 2471 struct usb_interface *interface) 2472 { 2473 struct hso_net *hso_net = dev2net(hso_dev); 2474 struct device *dev = &hso_net->net->dev; 2475 static u32 rfkill_counter; 2476 2477 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2478 rfkill_counter++); 2479 2480 hso_net->rfkill = rfkill_alloc(hso_net->name, 2481 &interface_to_usbdev(interface)->dev, 2482 RFKILL_TYPE_WWAN, 2483 &hso_rfkill_ops, hso_dev); 2484 if (!hso_net->rfkill) { 2485 dev_err(dev, "%s - Out of memory\n", __func__); 2486 return; 2487 } 2488 if (rfkill_register(hso_net->rfkill) < 0) { 2489 rfkill_destroy(hso_net->rfkill); 2490 hso_net->rfkill = NULL; 2491 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2492 return; 2493 } 2494 } 2495 2496 static struct device_type hso_type = { 2497 .name = "wwan", 2498 }; 2499 2500 /* Creates our network device */ 2501 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2502 int port_spec) 2503 { 2504 int result, i; 2505 struct net_device *net; 2506 struct hso_net *hso_net; 2507 struct hso_device *hso_dev; 2508 2509 hso_dev = hso_create_device(interface, port_spec); 2510 if (!hso_dev) 2511 return NULL; 2512 2513 /* allocate our network device, then we can put in our private data */ 2514 /* call hso_net_init to do the basic initialization */ 2515 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2516 hso_net_init); 2517 if (!net) { 2518 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2519 goto exit; 2520 } 2521 2522 hso_net = netdev_priv(net); 2523 2524 hso_dev->port_data.dev_net = hso_net; 2525 hso_net->net = net; 2526 hso_net->parent = hso_dev; 2527 2528 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2529 USB_DIR_IN); 2530 if (!hso_net->in_endp) { 2531 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2532 goto exit; 2533 } 2534 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2535 USB_DIR_OUT); 2536 if (!hso_net->out_endp) { 2537 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2538 goto exit; 2539 } 2540 SET_NETDEV_DEV(net, &interface->dev); 2541 SET_NETDEV_DEVTYPE(net, &hso_type); 2542 2543 /* registering our net device */ 2544 result = register_netdev(net); 2545 if (result) { 2546 dev_err(&interface->dev, "Failed to register device\n"); 2547 goto exit; 2548 } 2549 2550 /* start allocating */ 2551 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2552 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2553 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2554 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2555 goto exit; 2556 } 2557 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2558 GFP_KERNEL); 2559 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2560 goto exit; 2561 } 2562 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2563 if (!hso_net->mux_bulk_tx_urb) { 2564 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2565 goto exit; 2566 } 2567 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2568 if (!hso_net->mux_bulk_tx_buf) 2569 goto exit; 2570 2571 add_net_device(hso_dev); 2572 2573 hso_log_port(hso_dev); 2574 2575 hso_create_rfkill(hso_dev, interface); 2576 2577 return hso_dev; 2578 exit: 2579 hso_free_net_device(hso_dev); 2580 return NULL; 2581 } 2582 2583 static void hso_free_tiomget(struct hso_serial *serial) 2584 { 2585 struct hso_tiocmget *tiocmget; 2586 if (!serial) 2587 return; 2588 tiocmget = serial->tiocmget; 2589 if (tiocmget) { 2590 usb_free_urb(tiocmget->urb); 2591 tiocmget->urb = NULL; 2592 serial->tiocmget = NULL; 2593 kfree(tiocmget); 2594 } 2595 } 2596 2597 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2598 static void hso_free_serial_device(struct hso_device *hso_dev) 2599 { 2600 struct hso_serial *serial = dev2ser(hso_dev); 2601 2602 if (!serial) 2603 return; 2604 2605 hso_serial_common_free(serial); 2606 2607 if (serial->shared_int) { 2608 mutex_lock(&serial->shared_int->shared_int_lock); 2609 if (--serial->shared_int->ref_count == 0) 2610 hso_free_shared_int(serial->shared_int); 2611 else 2612 mutex_unlock(&serial->shared_int->shared_int_lock); 2613 } 2614 hso_free_tiomget(serial); 2615 kfree(serial); 2616 kfree(hso_dev); 2617 } 2618 2619 /* Creates a bulk AT channel */ 2620 static struct hso_device *hso_create_bulk_serial_device( 2621 struct usb_interface *interface, int port) 2622 { 2623 struct hso_device *hso_dev; 2624 struct hso_serial *serial; 2625 int num_urbs; 2626 struct hso_tiocmget *tiocmget; 2627 2628 hso_dev = hso_create_device(interface, port); 2629 if (!hso_dev) 2630 return NULL; 2631 2632 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2633 if (!serial) 2634 goto exit; 2635 2636 serial->parent = hso_dev; 2637 hso_dev->port_data.dev_serial = serial; 2638 2639 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2640 num_urbs = 2; 2641 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2642 GFP_KERNEL); 2643 /* it isn't going to break our heart if serial->tiocmget 2644 * allocation fails don't bother checking this. 2645 */ 2646 if (serial->tiocmget) { 2647 tiocmget = serial->tiocmget; 2648 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2649 if (tiocmget->urb) { 2650 mutex_init(&tiocmget->mutex); 2651 init_waitqueue_head(&tiocmget->waitq); 2652 tiocmget->endp = hso_get_ep( 2653 interface, 2654 USB_ENDPOINT_XFER_INT, 2655 USB_DIR_IN); 2656 } else 2657 hso_free_tiomget(serial); 2658 } 2659 } 2660 else 2661 num_urbs = 1; 2662 2663 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2664 BULK_URB_TX_SIZE)) 2665 goto exit; 2666 2667 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2668 USB_DIR_IN); 2669 if (!serial->in_endp) { 2670 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2671 goto exit2; 2672 } 2673 2674 if (! 2675 (serial->out_endp = 2676 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2677 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2678 goto exit2; 2679 } 2680 2681 serial->write_data = hso_std_serial_write_data; 2682 2683 /* and record this serial */ 2684 set_serial_by_index(serial->minor, serial); 2685 2686 /* setup the proc dirs and files if needed */ 2687 hso_log_port(hso_dev); 2688 2689 /* done, return it */ 2690 return hso_dev; 2691 2692 exit2: 2693 hso_serial_tty_unregister(serial); 2694 hso_serial_common_free(serial); 2695 exit: 2696 hso_free_tiomget(serial); 2697 kfree(serial); 2698 kfree(hso_dev); 2699 return NULL; 2700 } 2701 2702 /* Creates a multiplexed AT channel */ 2703 static 2704 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2705 int port, 2706 struct hso_shared_int *mux) 2707 { 2708 struct hso_device *hso_dev; 2709 struct hso_serial *serial; 2710 int port_spec; 2711 2712 port_spec = HSO_INTF_MUX; 2713 port_spec &= ~HSO_PORT_MASK; 2714 2715 port_spec |= hso_mux_to_port(port); 2716 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2717 return NULL; 2718 2719 hso_dev = hso_create_device(interface, port_spec); 2720 if (!hso_dev) 2721 return NULL; 2722 2723 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2724 if (!serial) 2725 goto exit; 2726 2727 hso_dev->port_data.dev_serial = serial; 2728 serial->parent = hso_dev; 2729 2730 if (hso_serial_common_create 2731 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2732 goto exit; 2733 2734 serial->tx_data_length--; 2735 serial->write_data = hso_mux_serial_write_data; 2736 2737 serial->shared_int = mux; 2738 mutex_lock(&serial->shared_int->shared_int_lock); 2739 serial->shared_int->ref_count++; 2740 mutex_unlock(&serial->shared_int->shared_int_lock); 2741 2742 /* and record this serial */ 2743 set_serial_by_index(serial->minor, serial); 2744 2745 /* setup the proc dirs and files if needed */ 2746 hso_log_port(hso_dev); 2747 2748 /* done, return it */ 2749 return hso_dev; 2750 2751 exit: 2752 if (serial) { 2753 tty_unregister_device(tty_drv, serial->minor); 2754 kfree(serial); 2755 } 2756 kfree(hso_dev); 2757 return NULL; 2758 2759 } 2760 2761 static void hso_free_shared_int(struct hso_shared_int *mux) 2762 { 2763 usb_free_urb(mux->shared_intr_urb); 2764 kfree(mux->shared_intr_buf); 2765 mutex_unlock(&mux->shared_int_lock); 2766 kfree(mux); 2767 } 2768 2769 static 2770 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2771 { 2772 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2773 2774 if (!mux) 2775 return NULL; 2776 2777 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2778 USB_DIR_IN); 2779 if (!mux->intr_endp) { 2780 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2781 goto exit; 2782 } 2783 2784 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2785 if (!mux->shared_intr_urb) { 2786 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2787 goto exit; 2788 } 2789 mux->shared_intr_buf = 2790 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2791 GFP_KERNEL); 2792 if (!mux->shared_intr_buf) 2793 goto exit; 2794 2795 mutex_init(&mux->shared_int_lock); 2796 2797 return mux; 2798 2799 exit: 2800 kfree(mux->shared_intr_buf); 2801 usb_free_urb(mux->shared_intr_urb); 2802 kfree(mux); 2803 return NULL; 2804 } 2805 2806 /* Gets the port spec for a certain interface */ 2807 static int hso_get_config_data(struct usb_interface *interface) 2808 { 2809 struct usb_device *usbdev = interface_to_usbdev(interface); 2810 u8 *config_data = kmalloc(17, GFP_KERNEL); 2811 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2812 s32 result; 2813 2814 if (!config_data) 2815 return -ENOMEM; 2816 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2817 0x86, 0xC0, 0, 0, config_data, 17, 2818 USB_CTRL_SET_TIMEOUT) != 0x11) { 2819 kfree(config_data); 2820 return -EIO; 2821 } 2822 2823 switch (config_data[if_num]) { 2824 case 0x0: 2825 result = 0; 2826 break; 2827 case 0x1: 2828 result = HSO_PORT_DIAG; 2829 break; 2830 case 0x2: 2831 result = HSO_PORT_GPS; 2832 break; 2833 case 0x3: 2834 result = HSO_PORT_GPS_CONTROL; 2835 break; 2836 case 0x4: 2837 result = HSO_PORT_APP; 2838 break; 2839 case 0x5: 2840 result = HSO_PORT_APP2; 2841 break; 2842 case 0x6: 2843 result = HSO_PORT_CONTROL; 2844 break; 2845 case 0x7: 2846 result = HSO_PORT_NETWORK; 2847 break; 2848 case 0x8: 2849 result = HSO_PORT_MODEM; 2850 break; 2851 case 0x9: 2852 result = HSO_PORT_MSD; 2853 break; 2854 case 0xa: 2855 result = HSO_PORT_PCSC; 2856 break; 2857 case 0xb: 2858 result = HSO_PORT_VOICE; 2859 break; 2860 default: 2861 result = 0; 2862 } 2863 2864 if (result) 2865 result |= HSO_INTF_BULK; 2866 2867 if (config_data[16] & 0x1) 2868 result |= HSO_INFO_CRC_BUG; 2869 2870 kfree(config_data); 2871 return result; 2872 } 2873 2874 /* called once for each interface upon device insertion */ 2875 static int hso_probe(struct usb_interface *interface, 2876 const struct usb_device_id *id) 2877 { 2878 int mux, i, if_num, port_spec; 2879 unsigned char port_mask; 2880 struct hso_device *hso_dev = NULL; 2881 struct hso_shared_int *shared_int; 2882 struct hso_device *tmp_dev = NULL; 2883 2884 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2885 dev_err(&interface->dev, "Not our interface\n"); 2886 return -ENODEV; 2887 } 2888 2889 if_num = interface->altsetting->desc.bInterfaceNumber; 2890 2891 /* Get the interface/port specification from either driver_info or from 2892 * the device itself */ 2893 if (id->driver_info) 2894 port_spec = ((u32 *)(id->driver_info))[if_num]; 2895 else 2896 port_spec = hso_get_config_data(interface); 2897 2898 /* Check if we need to switch to alt interfaces prior to port 2899 * configuration */ 2900 if (interface->num_altsetting > 1) 2901 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2902 interface->needs_remote_wakeup = 1; 2903 2904 /* Allocate new hso device(s) */ 2905 switch (port_spec & HSO_INTF_MASK) { 2906 case HSO_INTF_MUX: 2907 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2908 /* Create the network device */ 2909 if (!disable_net) { 2910 hso_dev = hso_create_net_device(interface, 2911 port_spec); 2912 if (!hso_dev) 2913 goto exit; 2914 tmp_dev = hso_dev; 2915 } 2916 } 2917 2918 if (hso_get_mux_ports(interface, &port_mask)) 2919 /* TODO: de-allocate everything */ 2920 goto exit; 2921 2922 shared_int = hso_create_shared_int(interface); 2923 if (!shared_int) 2924 goto exit; 2925 2926 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2927 if (port_mask & i) { 2928 hso_dev = hso_create_mux_serial_device( 2929 interface, i, shared_int); 2930 if (!hso_dev) 2931 goto exit; 2932 } 2933 } 2934 2935 if (tmp_dev) 2936 hso_dev = tmp_dev; 2937 break; 2938 2939 case HSO_INTF_BULK: 2940 /* It's a regular bulk interface */ 2941 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2942 if (!disable_net) 2943 hso_dev = 2944 hso_create_net_device(interface, port_spec); 2945 } else { 2946 hso_dev = 2947 hso_create_bulk_serial_device(interface, port_spec); 2948 } 2949 if (!hso_dev) 2950 goto exit; 2951 break; 2952 default: 2953 goto exit; 2954 } 2955 2956 /* save our data pointer in this device */ 2957 usb_set_intfdata(interface, hso_dev); 2958 2959 /* done */ 2960 return 0; 2961 exit: 2962 hso_free_interface(interface); 2963 return -ENODEV; 2964 } 2965 2966 /* device removed, cleaning up */ 2967 static void hso_disconnect(struct usb_interface *interface) 2968 { 2969 hso_free_interface(interface); 2970 2971 /* remove reference of our private data */ 2972 usb_set_intfdata(interface, NULL); 2973 } 2974 2975 static void async_get_intf(struct work_struct *data) 2976 { 2977 struct hso_device *hso_dev = 2978 container_of(data, struct hso_device, async_get_intf); 2979 usb_autopm_get_interface(hso_dev->interface); 2980 } 2981 2982 static void async_put_intf(struct work_struct *data) 2983 { 2984 struct hso_device *hso_dev = 2985 container_of(data, struct hso_device, async_put_intf); 2986 usb_autopm_put_interface(hso_dev->interface); 2987 } 2988 2989 static int hso_get_activity(struct hso_device *hso_dev) 2990 { 2991 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2992 if (!hso_dev->is_active) { 2993 hso_dev->is_active = 1; 2994 schedule_work(&hso_dev->async_get_intf); 2995 } 2996 } 2997 2998 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2999 return -EAGAIN; 3000 3001 usb_mark_last_busy(hso_dev->usb); 3002 3003 return 0; 3004 } 3005 3006 static int hso_put_activity(struct hso_device *hso_dev) 3007 { 3008 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3009 if (hso_dev->is_active) { 3010 hso_dev->is_active = 0; 3011 schedule_work(&hso_dev->async_put_intf); 3012 return -EAGAIN; 3013 } 3014 } 3015 hso_dev->is_active = 0; 3016 return 0; 3017 } 3018 3019 /* called by kernel when we need to suspend device */ 3020 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3021 { 3022 int i, result; 3023 3024 /* Stop all serial ports */ 3025 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3026 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3027 result = hso_stop_serial_device(serial_table[i]); 3028 if (result) 3029 goto out; 3030 } 3031 } 3032 3033 /* Stop all network ports */ 3034 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3035 if (network_table[i] && 3036 (network_table[i]->interface == iface)) { 3037 result = hso_stop_net_device(network_table[i]); 3038 if (result) 3039 goto out; 3040 } 3041 } 3042 3043 out: 3044 return 0; 3045 } 3046 3047 /* called by kernel when we need to resume device */ 3048 static int hso_resume(struct usb_interface *iface) 3049 { 3050 int i, result = 0; 3051 struct hso_net *hso_net; 3052 3053 /* Start all serial ports */ 3054 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3055 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3056 if (dev2ser(serial_table[i])->port.count) { 3057 result = 3058 hso_start_serial_device(serial_table[i], GFP_NOIO); 3059 hso_kick_transmit(dev2ser(serial_table[i])); 3060 if (result) 3061 goto out; 3062 } 3063 } 3064 } 3065 3066 /* Start all network ports */ 3067 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3068 if (network_table[i] && 3069 (network_table[i]->interface == iface)) { 3070 hso_net = dev2net(network_table[i]); 3071 if (hso_net->flags & IFF_UP) { 3072 /* First transmit any lingering data, 3073 then restart the device. */ 3074 if (hso_net->skb_tx_buf) { 3075 dev_dbg(&iface->dev, 3076 "Transmitting" 3077 " lingering data\n"); 3078 hso_net_start_xmit(hso_net->skb_tx_buf, 3079 hso_net->net); 3080 hso_net->skb_tx_buf = NULL; 3081 } 3082 result = hso_start_net_device(network_table[i]); 3083 if (result) 3084 goto out; 3085 } 3086 } 3087 } 3088 3089 out: 3090 return result; 3091 } 3092 3093 static void hso_serial_ref_free(struct kref *ref) 3094 { 3095 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3096 3097 hso_free_serial_device(hso_dev); 3098 } 3099 3100 static void hso_free_interface(struct usb_interface *interface) 3101 { 3102 struct hso_serial *serial; 3103 int i; 3104 3105 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3106 if (serial_table[i] && 3107 (serial_table[i]->interface == interface)) { 3108 serial = dev2ser(serial_table[i]); 3109 tty_port_tty_hangup(&serial->port, false); 3110 mutex_lock(&serial->parent->mutex); 3111 serial->parent->usb_gone = 1; 3112 mutex_unlock(&serial->parent->mutex); 3113 cancel_work_sync(&serial_table[i]->async_put_intf); 3114 cancel_work_sync(&serial_table[i]->async_get_intf); 3115 hso_serial_tty_unregister(serial); 3116 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3117 set_serial_by_index(i, NULL); 3118 } 3119 } 3120 3121 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3122 if (network_table[i] && 3123 (network_table[i]->interface == interface)) { 3124 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3125 /* hso_stop_net_device doesn't stop the net queue since 3126 * traffic needs to start it again when suspended */ 3127 netif_stop_queue(dev2net(network_table[i])->net); 3128 hso_stop_net_device(network_table[i]); 3129 cancel_work_sync(&network_table[i]->async_put_intf); 3130 cancel_work_sync(&network_table[i]->async_get_intf); 3131 if (rfk) { 3132 rfkill_unregister(rfk); 3133 rfkill_destroy(rfk); 3134 } 3135 hso_free_net_device(network_table[i]); 3136 } 3137 } 3138 } 3139 3140 /* Helper functions */ 3141 3142 /* Get the endpoint ! */ 3143 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3144 int type, int dir) 3145 { 3146 int i; 3147 struct usb_host_interface *iface = intf->cur_altsetting; 3148 struct usb_endpoint_descriptor *endp; 3149 3150 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3151 endp = &iface->endpoint[i].desc; 3152 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3153 (usb_endpoint_type(endp) == type)) 3154 return endp; 3155 } 3156 3157 return NULL; 3158 } 3159 3160 /* Get the byte that describes which ports are enabled */ 3161 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3162 { 3163 int i; 3164 struct usb_host_interface *iface = intf->cur_altsetting; 3165 3166 if (iface->extralen == 3) { 3167 *ports = iface->extra[2]; 3168 return 0; 3169 } 3170 3171 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3172 if (iface->endpoint[i].extralen == 3) { 3173 *ports = iface->endpoint[i].extra[2]; 3174 return 0; 3175 } 3176 } 3177 3178 return -1; 3179 } 3180 3181 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3182 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3183 struct usb_device *usb, gfp_t gfp) 3184 { 3185 int result; 3186 3187 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3188 usb_rcvintpipe(usb, 3189 shared_int->intr_endp->bEndpointAddress & 0x7F), 3190 shared_int->shared_intr_buf, 3191 1, 3192 intr_callback, shared_int, 3193 shared_int->intr_endp->bInterval); 3194 3195 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3196 if (result) 3197 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3198 result); 3199 3200 return result; 3201 } 3202 3203 /* operations setup of the serial interface */ 3204 static const struct tty_operations hso_serial_ops = { 3205 .open = hso_serial_open, 3206 .close = hso_serial_close, 3207 .write = hso_serial_write, 3208 .write_room = hso_serial_write_room, 3209 .cleanup = hso_serial_cleanup, 3210 .ioctl = hso_serial_ioctl, 3211 .set_termios = hso_serial_set_termios, 3212 .chars_in_buffer = hso_serial_chars_in_buffer, 3213 .tiocmget = hso_serial_tiocmget, 3214 .tiocmset = hso_serial_tiocmset, 3215 .get_icount = hso_get_count, 3216 .unthrottle = hso_unthrottle 3217 }; 3218 3219 static struct usb_driver hso_driver = { 3220 .name = driver_name, 3221 .probe = hso_probe, 3222 .disconnect = hso_disconnect, 3223 .id_table = hso_ids, 3224 .suspend = hso_suspend, 3225 .resume = hso_resume, 3226 .reset_resume = hso_resume, 3227 .supports_autosuspend = 1, 3228 .disable_hub_initiated_lpm = 1, 3229 }; 3230 3231 static int __init hso_init(void) 3232 { 3233 int i; 3234 int result; 3235 3236 /* put it in the log */ 3237 printk(KERN_INFO "hso: %s\n", version); 3238 3239 /* Initialise the serial table semaphore and table */ 3240 spin_lock_init(&serial_table_lock); 3241 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3242 serial_table[i] = NULL; 3243 3244 /* allocate our driver using the proper amount of supported minors */ 3245 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3246 if (!tty_drv) 3247 return -ENOMEM; 3248 3249 /* fill in all needed values */ 3250 tty_drv->driver_name = driver_name; 3251 tty_drv->name = tty_filename; 3252 3253 /* if major number is provided as parameter, use that one */ 3254 if (tty_major) 3255 tty_drv->major = tty_major; 3256 3257 tty_drv->minor_start = 0; 3258 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3259 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3260 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3261 tty_drv->init_termios = tty_std_termios; 3262 hso_init_termios(&tty_drv->init_termios); 3263 tty_set_operations(tty_drv, &hso_serial_ops); 3264 3265 /* register the tty driver */ 3266 result = tty_register_driver(tty_drv); 3267 if (result) { 3268 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3269 __func__, result); 3270 goto err_free_tty; 3271 } 3272 3273 /* register this module as an usb driver */ 3274 result = usb_register(&hso_driver); 3275 if (result) { 3276 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3277 result); 3278 goto err_unreg_tty; 3279 } 3280 3281 /* done */ 3282 return 0; 3283 err_unreg_tty: 3284 tty_unregister_driver(tty_drv); 3285 err_free_tty: 3286 put_tty_driver(tty_drv); 3287 return result; 3288 } 3289 3290 static void __exit hso_exit(void) 3291 { 3292 printk(KERN_INFO "hso: unloaded\n"); 3293 3294 tty_unregister_driver(tty_drv); 3295 put_tty_driver(tty_drv); 3296 /* deregister the usb driver */ 3297 usb_deregister(&hso_driver); 3298 } 3299 3300 /* Module definitions */ 3301 module_init(hso_init); 3302 module_exit(hso_exit); 3303 3304 MODULE_AUTHOR(MOD_AUTHOR); 3305 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3306 MODULE_LICENSE(MOD_LICENSE); 3307 3308 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3309 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3310 module_param(debug, int, S_IRUGO | S_IWUSR); 3311 3312 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3313 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3314 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3315 3316 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3317 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3318 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3319