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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 54 55 #include <linux/sched.h> 56 #include <linux/slab.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/netdevice.h> 60 #include <linux/module.h> 61 #include <linux/ethtool.h> 62 #include <linux/usb.h> 63 #include <linux/tty.h> 64 #include <linux/tty_driver.h> 65 #include <linux/tty_flip.h> 66 #include <linux/kmod.h> 67 #include <linux/rfkill.h> 68 #include <linux/ip.h> 69 #include <linux/uaccess.h> 70 #include <linux/usb/cdc.h> 71 #include <net/arp.h> 72 #include <asm/byteorder.h> 73 #include <linux/serial_core.h> 74 #include <linux/serial.h> 75 76 77 #define MOD_AUTHOR "Option Wireless" 78 #define MOD_DESCRIPTION "USB High Speed Option driver" 79 #define MOD_LICENSE "GPL" 80 81 #define HSO_MAX_NET_DEVICES 10 82 #define HSO__MAX_MTU 2048 83 #define DEFAULT_MTU 1500 84 #define DEFAULT_MRU 1500 85 86 #define CTRL_URB_RX_SIZE 1024 87 #define CTRL_URB_TX_SIZE 64 88 89 #define BULK_URB_RX_SIZE 4096 90 #define BULK_URB_TX_SIZE 8192 91 92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 94 #define MUX_BULK_RX_BUF_COUNT 4 95 #define USB_TYPE_OPTION_VENDOR 0x20 96 97 /* These definitions are used with the struct hso_net flags element */ 98 /* - use *_bit operations on it. (bit indices not values.) */ 99 #define HSO_NET_RUNNING 0 100 101 #define HSO_NET_TX_TIMEOUT (HZ*10) 102 103 #define HSO_SERIAL_MAGIC 0x48534f31 104 105 /* Number of ttys to handle */ 106 #define HSO_SERIAL_TTY_MINORS 256 107 108 #define MAX_RX_URBS 2 109 110 /*****************************************************************************/ 111 /* Debugging functions */ 112 /*****************************************************************************/ 113 #define hso_dbg(lvl, fmt, ...) \ 114 do { \ 115 if ((lvl) & debug) \ 116 pr_info("[%d:%s] " fmt, \ 117 __LINE__, __func__, ##__VA_ARGS__); \ 118 } while (0) 119 120 /*****************************************************************************/ 121 /* Enumerators */ 122 /*****************************************************************************/ 123 enum pkt_parse_state { 124 WAIT_IP, 125 WAIT_DATA, 126 WAIT_SYNC 127 }; 128 129 /*****************************************************************************/ 130 /* Structs */ 131 /*****************************************************************************/ 132 133 struct hso_shared_int { 134 struct usb_endpoint_descriptor *intr_endp; 135 void *shared_intr_buf; 136 struct urb *shared_intr_urb; 137 struct usb_device *usb; 138 int use_count; 139 int ref_count; 140 struct mutex shared_int_lock; 141 }; 142 143 struct hso_net { 144 struct hso_device *parent; 145 struct net_device *net; 146 struct rfkill *rfkill; 147 char name[24]; 148 149 struct usb_endpoint_descriptor *in_endp; 150 struct usb_endpoint_descriptor *out_endp; 151 152 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 153 struct urb *mux_bulk_tx_urb; 154 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 155 void *mux_bulk_tx_buf; 156 157 struct sk_buff *skb_rx_buf; 158 struct sk_buff *skb_tx_buf; 159 160 enum pkt_parse_state rx_parse_state; 161 spinlock_t net_lock; 162 163 unsigned short rx_buf_size; 164 unsigned short rx_buf_missing; 165 struct iphdr rx_ip_hdr; 166 167 unsigned long flags; 168 }; 169 170 enum rx_ctrl_state{ 171 RX_IDLE, 172 RX_SENT, 173 RX_PENDING 174 }; 175 176 #define BM_REQUEST_TYPE (0xa1) 177 #define B_NOTIFICATION (0x20) 178 #define W_VALUE (0x0) 179 #define W_LENGTH (0x2) 180 181 #define B_OVERRUN (0x1<<6) 182 #define B_PARITY (0x1<<5) 183 #define B_FRAMING (0x1<<4) 184 #define B_RING_SIGNAL (0x1<<3) 185 #define B_BREAK (0x1<<2) 186 #define B_TX_CARRIER (0x1<<1) 187 #define B_RX_CARRIER (0x1<<0) 188 189 struct hso_serial_state_notification { 190 u8 bmRequestType; 191 u8 bNotification; 192 u16 wValue; 193 u16 wIndex; 194 u16 wLength; 195 u16 UART_state_bitmap; 196 } __packed; 197 198 struct hso_tiocmget { 199 struct mutex mutex; 200 wait_queue_head_t waitq; 201 int intr_completed; 202 struct usb_endpoint_descriptor *endp; 203 struct urb *urb; 204 struct hso_serial_state_notification serial_state_notification; 205 u16 prev_UART_state_bitmap; 206 struct uart_icount icount; 207 }; 208 209 210 struct hso_serial { 211 struct hso_device *parent; 212 int magic; 213 u8 minor; 214 215 struct hso_shared_int *shared_int; 216 217 /* rx/tx urb could be either a bulk urb or a control urb depending 218 on which serial port it is used on. */ 219 struct urb *rx_urb[MAX_RX_URBS]; 220 u8 num_rx_urbs; 221 u8 *rx_data[MAX_RX_URBS]; 222 u16 rx_data_length; /* should contain allocated length */ 223 224 struct urb *tx_urb; 225 u8 *tx_data; 226 u8 *tx_buffer; 227 u16 tx_data_length; /* should contain allocated length */ 228 u16 tx_data_count; 229 u16 tx_buffer_count; 230 struct usb_ctrlrequest ctrl_req_tx; 231 struct usb_ctrlrequest ctrl_req_rx; 232 233 struct usb_endpoint_descriptor *in_endp; 234 struct usb_endpoint_descriptor *out_endp; 235 236 enum rx_ctrl_state rx_state; 237 u8 rts_state; 238 u8 dtr_state; 239 unsigned tx_urb_used:1; 240 241 struct tty_port port; 242 /* from usb_serial_port */ 243 spinlock_t serial_lock; 244 245 int (*write_data) (struct hso_serial *serial); 246 struct hso_tiocmget *tiocmget; 247 /* Hacks required to get flow control 248 * working on the serial receive buffers 249 * so as not to drop characters on the floor. 250 */ 251 int curr_rx_urb_idx; 252 u8 rx_urb_filled[MAX_RX_URBS]; 253 struct tasklet_struct unthrottle_tasklet; 254 }; 255 256 struct hso_device { 257 union { 258 struct hso_serial *dev_serial; 259 struct hso_net *dev_net; 260 } port_data; 261 262 u32 port_spec; 263 264 u8 is_active; 265 u8 usb_gone; 266 struct work_struct async_get_intf; 267 struct work_struct async_put_intf; 268 269 struct usb_device *usb; 270 struct usb_interface *interface; 271 272 struct device *dev; 273 struct kref ref; 274 struct mutex mutex; 275 }; 276 277 /* Type of interface */ 278 #define HSO_INTF_MASK 0xFF00 279 #define HSO_INTF_MUX 0x0100 280 #define HSO_INTF_BULK 0x0200 281 282 /* Type of port */ 283 #define HSO_PORT_MASK 0xFF 284 #define HSO_PORT_NO_PORT 0x0 285 #define HSO_PORT_CONTROL 0x1 286 #define HSO_PORT_APP 0x2 287 #define HSO_PORT_GPS 0x3 288 #define HSO_PORT_PCSC 0x4 289 #define HSO_PORT_APP2 0x5 290 #define HSO_PORT_GPS_CONTROL 0x6 291 #define HSO_PORT_MSD 0x7 292 #define HSO_PORT_VOICE 0x8 293 #define HSO_PORT_DIAG2 0x9 294 #define HSO_PORT_DIAG 0x10 295 #define HSO_PORT_MODEM 0x11 296 #define HSO_PORT_NETWORK 0x12 297 298 /* Additional device info */ 299 #define HSO_INFO_MASK 0xFF000000 300 #define HSO_INFO_CRC_BUG 0x01000000 301 302 /*****************************************************************************/ 303 /* Prototypes */ 304 /*****************************************************************************/ 305 /* Serial driver functions */ 306 static int hso_serial_tiocmset(struct tty_struct *tty, 307 unsigned int set, unsigned int clear); 308 static void ctrl_callback(struct urb *urb); 309 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 310 static void hso_kick_transmit(struct hso_serial *serial); 311 /* Helper functions */ 312 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 313 struct usb_device *usb, gfp_t gfp); 314 static void handle_usb_error(int status, const char *function, 315 struct hso_device *hso_dev); 316 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 317 int type, int dir); 318 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 319 static void hso_free_interface(struct usb_interface *intf); 320 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 321 static int hso_stop_serial_device(struct hso_device *hso_dev); 322 static int hso_start_net_device(struct hso_device *hso_dev); 323 static void hso_free_shared_int(struct hso_shared_int *shared_int); 324 static int hso_stop_net_device(struct hso_device *hso_dev); 325 static void hso_serial_ref_free(struct kref *ref); 326 static void hso_std_serial_read_bulk_callback(struct urb *urb); 327 static int hso_mux_serial_read(struct hso_serial *serial); 328 static void async_get_intf(struct work_struct *data); 329 static void async_put_intf(struct work_struct *data); 330 static int hso_put_activity(struct hso_device *hso_dev); 331 static int hso_get_activity(struct hso_device *hso_dev); 332 static void tiocmget_intr_callback(struct urb *urb); 333 /*****************************************************************************/ 334 /* Helping functions */ 335 /*****************************************************************************/ 336 337 /* #define DEBUG */ 338 339 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 340 { 341 return hso_dev->port_data.dev_net; 342 } 343 344 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 345 { 346 return hso_dev->port_data.dev_serial; 347 } 348 349 /* Debugging functions */ 350 #ifdef DEBUG 351 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 352 unsigned int len) 353 { 354 static char name[255]; 355 356 sprintf(name, "hso[%d:%s]", line_count, func_name); 357 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 358 } 359 360 #define DUMP(buf_, len_) \ 361 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 362 363 #define DUMP1(buf_, len_) \ 364 do { \ 365 if (0x01 & debug) \ 366 DUMP(buf_, len_); \ 367 } while (0) 368 #else 369 #define DUMP(buf_, len_) 370 #define DUMP1(buf_, len_) 371 #endif 372 373 /* module parameters */ 374 static int debug; 375 static int tty_major; 376 static int disable_net; 377 378 /* driver info */ 379 static const char driver_name[] = "hso"; 380 static const char tty_filename[] = "ttyHS"; 381 static const char *version = __FILE__ ": " MOD_AUTHOR; 382 /* the usb driver itself (registered in hso_init) */ 383 static struct usb_driver hso_driver; 384 /* serial structures */ 385 static struct tty_driver *tty_drv; 386 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 387 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 388 static spinlock_t serial_table_lock; 389 390 static const s32 default_port_spec[] = { 391 HSO_INTF_MUX | HSO_PORT_NETWORK, 392 HSO_INTF_BULK | HSO_PORT_DIAG, 393 HSO_INTF_BULK | HSO_PORT_MODEM, 394 0 395 }; 396 397 static const s32 icon321_port_spec[] = { 398 HSO_INTF_MUX | HSO_PORT_NETWORK, 399 HSO_INTF_BULK | HSO_PORT_DIAG2, 400 HSO_INTF_BULK | HSO_PORT_MODEM, 401 HSO_INTF_BULK | HSO_PORT_DIAG, 402 0 403 }; 404 405 #define default_port_device(vendor, product) \ 406 USB_DEVICE(vendor, product), \ 407 .driver_info = (kernel_ulong_t)default_port_spec 408 409 #define icon321_port_device(vendor, product) \ 410 USB_DEVICE(vendor, product), \ 411 .driver_info = (kernel_ulong_t)icon321_port_spec 412 413 /* list of devices we support */ 414 static const struct usb_device_id hso_ids[] = { 415 {default_port_device(0x0af0, 0x6711)}, 416 {default_port_device(0x0af0, 0x6731)}, 417 {default_port_device(0x0af0, 0x6751)}, 418 {default_port_device(0x0af0, 0x6771)}, 419 {default_port_device(0x0af0, 0x6791)}, 420 {default_port_device(0x0af0, 0x6811)}, 421 {default_port_device(0x0af0, 0x6911)}, 422 {default_port_device(0x0af0, 0x6951)}, 423 {default_port_device(0x0af0, 0x6971)}, 424 {default_port_device(0x0af0, 0x7011)}, 425 {default_port_device(0x0af0, 0x7031)}, 426 {default_port_device(0x0af0, 0x7051)}, 427 {default_port_device(0x0af0, 0x7071)}, 428 {default_port_device(0x0af0, 0x7111)}, 429 {default_port_device(0x0af0, 0x7211)}, 430 {default_port_device(0x0af0, 0x7251)}, 431 {default_port_device(0x0af0, 0x7271)}, 432 {default_port_device(0x0af0, 0x7311)}, 433 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 434 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 435 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 436 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 437 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 438 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 439 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 440 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 441 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 442 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 443 {USB_DEVICE(0x0af0, 0x7701)}, 444 {USB_DEVICE(0x0af0, 0x7706)}, 445 {USB_DEVICE(0x0af0, 0x7801)}, 446 {USB_DEVICE(0x0af0, 0x7901)}, 447 {USB_DEVICE(0x0af0, 0x7A01)}, 448 {USB_DEVICE(0x0af0, 0x7A05)}, 449 {USB_DEVICE(0x0af0, 0x8200)}, 450 {USB_DEVICE(0x0af0, 0x8201)}, 451 {USB_DEVICE(0x0af0, 0x8300)}, 452 {USB_DEVICE(0x0af0, 0x8302)}, 453 {USB_DEVICE(0x0af0, 0x8304)}, 454 {USB_DEVICE(0x0af0, 0x8400)}, 455 {USB_DEVICE(0x0af0, 0x8600)}, 456 {USB_DEVICE(0x0af0, 0x8800)}, 457 {USB_DEVICE(0x0af0, 0x8900)}, 458 {USB_DEVICE(0x0af0, 0x9000)}, 459 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 460 {USB_DEVICE(0x0af0, 0xd035)}, 461 {USB_DEVICE(0x0af0, 0xd055)}, 462 {USB_DEVICE(0x0af0, 0xd155)}, 463 {USB_DEVICE(0x0af0, 0xd255)}, 464 {USB_DEVICE(0x0af0, 0xd057)}, 465 {USB_DEVICE(0x0af0, 0xd157)}, 466 {USB_DEVICE(0x0af0, 0xd257)}, 467 {USB_DEVICE(0x0af0, 0xd357)}, 468 {USB_DEVICE(0x0af0, 0xd058)}, 469 {USB_DEVICE(0x0af0, 0xc100)}, 470 {} 471 }; 472 MODULE_DEVICE_TABLE(usb, hso_ids); 473 474 /* Sysfs attribute */ 475 static ssize_t hso_sysfs_show_porttype(struct device *dev, 476 struct device_attribute *attr, 477 char *buf) 478 { 479 struct hso_device *hso_dev = dev_get_drvdata(dev); 480 char *port_name; 481 482 if (!hso_dev) 483 return 0; 484 485 switch (hso_dev->port_spec & HSO_PORT_MASK) { 486 case HSO_PORT_CONTROL: 487 port_name = "Control"; 488 break; 489 case HSO_PORT_APP: 490 port_name = "Application"; 491 break; 492 case HSO_PORT_APP2: 493 port_name = "Application2"; 494 break; 495 case HSO_PORT_GPS: 496 port_name = "GPS"; 497 break; 498 case HSO_PORT_GPS_CONTROL: 499 port_name = "GPS Control"; 500 break; 501 case HSO_PORT_PCSC: 502 port_name = "PCSC"; 503 break; 504 case HSO_PORT_DIAG: 505 port_name = "Diagnostic"; 506 break; 507 case HSO_PORT_DIAG2: 508 port_name = "Diagnostic2"; 509 break; 510 case HSO_PORT_MODEM: 511 port_name = "Modem"; 512 break; 513 case HSO_PORT_NETWORK: 514 port_name = "Network"; 515 break; 516 default: 517 port_name = "Unknown"; 518 break; 519 } 520 521 return sprintf(buf, "%s\n", port_name); 522 } 523 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 524 525 static struct attribute *hso_serial_dev_attrs[] = { 526 &dev_attr_hsotype.attr, 527 NULL 528 }; 529 530 ATTRIBUTE_GROUPS(hso_serial_dev); 531 532 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 533 { 534 int idx; 535 536 for (idx = 0; idx < serial->num_rx_urbs; idx++) 537 if (serial->rx_urb[idx] == urb) 538 return idx; 539 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 540 return -1; 541 } 542 543 /* converts mux value to a port spec value */ 544 static u32 hso_mux_to_port(int mux) 545 { 546 u32 result; 547 548 switch (mux) { 549 case 0x1: 550 result = HSO_PORT_CONTROL; 551 break; 552 case 0x2: 553 result = HSO_PORT_APP; 554 break; 555 case 0x4: 556 result = HSO_PORT_PCSC; 557 break; 558 case 0x8: 559 result = HSO_PORT_GPS; 560 break; 561 case 0x10: 562 result = HSO_PORT_APP2; 563 break; 564 default: 565 result = HSO_PORT_NO_PORT; 566 } 567 return result; 568 } 569 570 /* converts port spec value to a mux value */ 571 static u32 hso_port_to_mux(int port) 572 { 573 u32 result; 574 575 switch (port & HSO_PORT_MASK) { 576 case HSO_PORT_CONTROL: 577 result = 0x0; 578 break; 579 case HSO_PORT_APP: 580 result = 0x1; 581 break; 582 case HSO_PORT_PCSC: 583 result = 0x2; 584 break; 585 case HSO_PORT_GPS: 586 result = 0x3; 587 break; 588 case HSO_PORT_APP2: 589 result = 0x4; 590 break; 591 default: 592 result = 0x0; 593 } 594 return result; 595 } 596 597 static struct hso_serial *get_serial_by_shared_int_and_type( 598 struct hso_shared_int *shared_int, 599 int mux) 600 { 601 int i, port; 602 603 port = hso_mux_to_port(mux); 604 605 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 606 if (serial_table[i] && 607 (dev2ser(serial_table[i])->shared_int == shared_int) && 608 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 609 return dev2ser(serial_table[i]); 610 } 611 } 612 613 return NULL; 614 } 615 616 static struct hso_serial *get_serial_by_index(unsigned index) 617 { 618 struct hso_serial *serial = NULL; 619 unsigned long flags; 620 621 spin_lock_irqsave(&serial_table_lock, flags); 622 if (serial_table[index]) 623 serial = dev2ser(serial_table[index]); 624 spin_unlock_irqrestore(&serial_table_lock, flags); 625 626 return serial; 627 } 628 629 static int get_free_serial_index(void) 630 { 631 int index; 632 unsigned long flags; 633 634 spin_lock_irqsave(&serial_table_lock, flags); 635 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 636 if (serial_table[index] == NULL) { 637 spin_unlock_irqrestore(&serial_table_lock, flags); 638 return index; 639 } 640 } 641 spin_unlock_irqrestore(&serial_table_lock, flags); 642 643 pr_err("%s: no free serial devices in table\n", __func__); 644 return -1; 645 } 646 647 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 648 { 649 unsigned long flags; 650 651 spin_lock_irqsave(&serial_table_lock, flags); 652 if (serial) 653 serial_table[index] = serial->parent; 654 else 655 serial_table[index] = NULL; 656 spin_unlock_irqrestore(&serial_table_lock, flags); 657 } 658 659 static void handle_usb_error(int status, const char *function, 660 struct hso_device *hso_dev) 661 { 662 char *explanation; 663 664 switch (status) { 665 case -ENODEV: 666 explanation = "no device"; 667 break; 668 case -ENOENT: 669 explanation = "endpoint not enabled"; 670 break; 671 case -EPIPE: 672 explanation = "endpoint stalled"; 673 break; 674 case -ENOSPC: 675 explanation = "not enough bandwidth"; 676 break; 677 case -ESHUTDOWN: 678 explanation = "device disabled"; 679 break; 680 case -EHOSTUNREACH: 681 explanation = "device suspended"; 682 break; 683 case -EINVAL: 684 case -EAGAIN: 685 case -EFBIG: 686 case -EMSGSIZE: 687 explanation = "internal error"; 688 break; 689 case -EILSEQ: 690 case -EPROTO: 691 case -ETIME: 692 case -ETIMEDOUT: 693 explanation = "protocol error"; 694 if (hso_dev) 695 usb_queue_reset_device(hso_dev->interface); 696 break; 697 default: 698 explanation = "unknown status"; 699 break; 700 } 701 702 /* log a meaningful explanation of an USB status */ 703 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 704 function, explanation, status); 705 } 706 707 /* Network interface functions */ 708 709 /* called when net interface is brought up by ifconfig */ 710 static int hso_net_open(struct net_device *net) 711 { 712 struct hso_net *odev = netdev_priv(net); 713 unsigned long flags = 0; 714 715 if (!odev) { 716 dev_err(&net->dev, "No net device !\n"); 717 return -ENODEV; 718 } 719 720 odev->skb_tx_buf = NULL; 721 722 /* setup environment */ 723 spin_lock_irqsave(&odev->net_lock, flags); 724 odev->rx_parse_state = WAIT_IP; 725 odev->rx_buf_size = 0; 726 odev->rx_buf_missing = sizeof(struct iphdr); 727 spin_unlock_irqrestore(&odev->net_lock, flags); 728 729 /* We are up and running. */ 730 set_bit(HSO_NET_RUNNING, &odev->flags); 731 hso_start_net_device(odev->parent); 732 733 /* Tell the kernel we are ready to start receiving from it */ 734 netif_start_queue(net); 735 736 return 0; 737 } 738 739 /* called when interface is brought down by ifconfig */ 740 static int hso_net_close(struct net_device *net) 741 { 742 struct hso_net *odev = netdev_priv(net); 743 744 /* we don't need the queue anymore */ 745 netif_stop_queue(net); 746 /* no longer running */ 747 clear_bit(HSO_NET_RUNNING, &odev->flags); 748 749 hso_stop_net_device(odev->parent); 750 751 /* done */ 752 return 0; 753 } 754 755 /* USB tells is xmit done, we should start the netqueue again */ 756 static void write_bulk_callback(struct urb *urb) 757 { 758 struct hso_net *odev = urb->context; 759 int status = urb->status; 760 761 /* Sanity check */ 762 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 763 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 764 return; 765 } 766 767 /* Do we still have a valid kernel network device? */ 768 if (!netif_device_present(odev->net)) { 769 dev_err(&urb->dev->dev, "%s: net device not present\n", 770 __func__); 771 return; 772 } 773 774 /* log status, but don't act on it, we don't need to resubmit anything 775 * anyhow */ 776 if (status) 777 handle_usb_error(status, __func__, odev->parent); 778 779 hso_put_activity(odev->parent); 780 781 /* Tell the network interface we are ready for another frame */ 782 netif_wake_queue(odev->net); 783 } 784 785 /* called by kernel when we need to transmit a packet */ 786 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 787 struct net_device *net) 788 { 789 struct hso_net *odev = netdev_priv(net); 790 int result; 791 792 /* Tell the kernel, "No more frames 'til we are done with this one." */ 793 netif_stop_queue(net); 794 if (hso_get_activity(odev->parent) == -EAGAIN) { 795 odev->skb_tx_buf = skb; 796 return NETDEV_TX_OK; 797 } 798 799 /* log if asked */ 800 DUMP1(skb->data, skb->len); 801 /* Copy it from kernel memory to OUR memory */ 802 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 803 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 804 805 /* Fill in the URB for shipping it out. */ 806 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 807 odev->parent->usb, 808 usb_sndbulkpipe(odev->parent->usb, 809 odev->out_endp-> 810 bEndpointAddress & 0x7F), 811 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 812 odev); 813 814 /* Deal with the Zero Length packet problem, I hope */ 815 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 816 817 /* Send the URB on its merry way. */ 818 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 819 if (result) { 820 dev_warn(&odev->parent->interface->dev, 821 "failed mux_bulk_tx_urb %d\n", result); 822 net->stats.tx_errors++; 823 netif_start_queue(net); 824 } else { 825 net->stats.tx_packets++; 826 net->stats.tx_bytes += skb->len; 827 } 828 dev_kfree_skb(skb); 829 /* we're done */ 830 return NETDEV_TX_OK; 831 } 832 833 static const struct ethtool_ops ops = { 834 .get_link = ethtool_op_get_link 835 }; 836 837 /* called when a packet did not ack after watchdogtimeout */ 838 static void hso_net_tx_timeout(struct net_device *net) 839 { 840 struct hso_net *odev = netdev_priv(net); 841 842 if (!odev) 843 return; 844 845 /* Tell syslog we are hosed. */ 846 dev_warn(&net->dev, "Tx timed out.\n"); 847 848 /* Tear the waiting frame off the list */ 849 if (odev->mux_bulk_tx_urb && 850 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 851 usb_unlink_urb(odev->mux_bulk_tx_urb); 852 853 /* Update statistics */ 854 net->stats.tx_errors++; 855 } 856 857 /* make a real packet from the received USB buffer */ 858 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 859 unsigned int count, unsigned char is_eop) 860 { 861 unsigned short temp_bytes; 862 unsigned short buffer_offset = 0; 863 unsigned short frame_len; 864 unsigned char *tmp_rx_buf; 865 866 /* log if needed */ 867 hso_dbg(0x1, "Rx %d bytes\n", count); 868 DUMP(ip_pkt, min(128, (int)count)); 869 870 while (count) { 871 switch (odev->rx_parse_state) { 872 case WAIT_IP: 873 /* waiting for IP header. */ 874 /* wanted bytes - size of ip header */ 875 temp_bytes = 876 (count < 877 odev->rx_buf_missing) ? count : odev-> 878 rx_buf_missing; 879 880 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 881 odev->rx_buf_size, ip_pkt + buffer_offset, 882 temp_bytes); 883 884 odev->rx_buf_size += temp_bytes; 885 buffer_offset += temp_bytes; 886 odev->rx_buf_missing -= temp_bytes; 887 count -= temp_bytes; 888 889 if (!odev->rx_buf_missing) { 890 /* header is complete allocate an sk_buffer and 891 * continue to WAIT_DATA */ 892 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 893 894 if ((frame_len > DEFAULT_MRU) || 895 (frame_len < sizeof(struct iphdr))) { 896 dev_err(&odev->net->dev, 897 "Invalid frame (%d) length\n", 898 frame_len); 899 odev->rx_parse_state = WAIT_SYNC; 900 continue; 901 } 902 /* Allocate an sk_buff */ 903 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 904 frame_len); 905 if (!odev->skb_rx_buf) { 906 /* We got no receive buffer. */ 907 hso_dbg(0x1, "could not allocate memory\n"); 908 odev->rx_parse_state = WAIT_SYNC; 909 continue; 910 } 911 912 /* Copy what we got so far. make room for iphdr 913 * after tail. */ 914 tmp_rx_buf = 915 skb_put(odev->skb_rx_buf, 916 sizeof(struct iphdr)); 917 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 918 sizeof(struct iphdr)); 919 920 /* ETH_HLEN */ 921 odev->rx_buf_size = sizeof(struct iphdr); 922 923 /* Filip actually use .tot_len */ 924 odev->rx_buf_missing = 925 frame_len - sizeof(struct iphdr); 926 odev->rx_parse_state = WAIT_DATA; 927 } 928 break; 929 930 case WAIT_DATA: 931 temp_bytes = (count < odev->rx_buf_missing) 932 ? count : odev->rx_buf_missing; 933 934 /* Copy the rest of the bytes that are left in the 935 * buffer into the waiting sk_buf. */ 936 /* Make room for temp_bytes after tail. */ 937 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 938 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 939 940 odev->rx_buf_missing -= temp_bytes; 941 count -= temp_bytes; 942 buffer_offset += temp_bytes; 943 odev->rx_buf_size += temp_bytes; 944 if (!odev->rx_buf_missing) { 945 /* Packet is complete. Inject into stack. */ 946 /* We have IP packet here */ 947 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 948 skb_reset_mac_header(odev->skb_rx_buf); 949 950 /* Ship it off to the kernel */ 951 netif_rx(odev->skb_rx_buf); 952 /* No longer our buffer. */ 953 odev->skb_rx_buf = NULL; 954 955 /* update out statistics */ 956 odev->net->stats.rx_packets++; 957 958 odev->net->stats.rx_bytes += odev->rx_buf_size; 959 960 odev->rx_buf_size = 0; 961 odev->rx_buf_missing = sizeof(struct iphdr); 962 odev->rx_parse_state = WAIT_IP; 963 } 964 break; 965 966 case WAIT_SYNC: 967 hso_dbg(0x1, " W_S\n"); 968 count = 0; 969 break; 970 default: 971 hso_dbg(0x1, "\n"); 972 count--; 973 break; 974 } 975 } 976 977 /* Recovery mechanism for WAIT_SYNC state. */ 978 if (is_eop) { 979 if (odev->rx_parse_state == WAIT_SYNC) { 980 odev->rx_parse_state = WAIT_IP; 981 odev->rx_buf_size = 0; 982 odev->rx_buf_missing = sizeof(struct iphdr); 983 } 984 } 985 } 986 987 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 988 { 989 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 990 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 991 992 if (((rest == 5) || (rest == 6)) && 993 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 994 crc_check, 4)) { 995 urb->actual_length -= 4; 996 } 997 } 998 999 /* Moving data from usb to kernel (in interrupt state) */ 1000 static void read_bulk_callback(struct urb *urb) 1001 { 1002 struct hso_net *odev = urb->context; 1003 struct net_device *net; 1004 int result; 1005 int status = urb->status; 1006 1007 /* is al ok? (Filip: Who's Al ?) */ 1008 if (status) { 1009 handle_usb_error(status, __func__, odev->parent); 1010 return; 1011 } 1012 1013 /* Sanity check */ 1014 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1015 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1016 return; 1017 } 1018 usb_mark_last_busy(urb->dev); 1019 1020 net = odev->net; 1021 1022 if (!netif_device_present(net)) { 1023 /* Somebody killed our network interface... */ 1024 return; 1025 } 1026 1027 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1028 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1029 1030 /* do we even have a packet? */ 1031 if (urb->actual_length) { 1032 /* Handle the IP stream, add header and push it onto network 1033 * stack if the packet is complete. */ 1034 spin_lock(&odev->net_lock); 1035 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1036 (urb->transfer_buffer_length > 1037 urb->actual_length) ? 1 : 0); 1038 spin_unlock(&odev->net_lock); 1039 } 1040 1041 /* We are done with this URB, resubmit it. Prep the USB to wait for 1042 * another frame. Reuse same as received. */ 1043 usb_fill_bulk_urb(urb, 1044 odev->parent->usb, 1045 usb_rcvbulkpipe(odev->parent->usb, 1046 odev->in_endp-> 1047 bEndpointAddress & 0x7F), 1048 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1049 read_bulk_callback, odev); 1050 1051 /* Give this to the USB subsystem so it can tell us when more data 1052 * arrives. */ 1053 result = usb_submit_urb(urb, GFP_ATOMIC); 1054 if (result) 1055 dev_warn(&odev->parent->interface->dev, 1056 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1057 result); 1058 } 1059 1060 /* Serial driver functions */ 1061 1062 static void hso_init_termios(struct ktermios *termios) 1063 { 1064 /* 1065 * The default requirements for this device are: 1066 */ 1067 termios->c_iflag &= 1068 ~(IGNBRK /* disable ignore break */ 1069 | BRKINT /* disable break causes interrupt */ 1070 | PARMRK /* disable mark parity errors */ 1071 | ISTRIP /* disable clear high bit of input characters */ 1072 | INLCR /* disable translate NL to CR */ 1073 | IGNCR /* disable ignore CR */ 1074 | ICRNL /* disable translate CR to NL */ 1075 | IXON); /* disable enable XON/XOFF flow control */ 1076 1077 /* disable postprocess output characters */ 1078 termios->c_oflag &= ~OPOST; 1079 1080 termios->c_lflag &= 1081 ~(ECHO /* disable echo input characters */ 1082 | ECHONL /* disable echo new line */ 1083 | ICANON /* disable erase, kill, werase, and rprnt 1084 special characters */ 1085 | ISIG /* disable interrupt, quit, and suspend special 1086 characters */ 1087 | IEXTEN); /* disable non-POSIX special characters */ 1088 1089 termios->c_cflag &= 1090 ~(CSIZE /* no size */ 1091 | PARENB /* disable parity bit */ 1092 | CBAUD /* clear current baud rate */ 1093 | CBAUDEX); /* clear current buad rate */ 1094 1095 termios->c_cflag |= CS8; /* character size 8 bits */ 1096 1097 /* baud rate 115200 */ 1098 tty_termios_encode_baud_rate(termios, 115200, 115200); 1099 } 1100 1101 static void _hso_serial_set_termios(struct tty_struct *tty, 1102 struct ktermios *old) 1103 { 1104 struct hso_serial *serial = tty->driver_data; 1105 1106 if (!serial) { 1107 pr_err("%s: no tty structures", __func__); 1108 return; 1109 } 1110 1111 hso_dbg(0x8, "port %d\n", serial->minor); 1112 1113 /* 1114 * Fix up unsupported bits 1115 */ 1116 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1117 1118 tty->termios.c_cflag &= 1119 ~(CSIZE /* no size */ 1120 | PARENB /* disable parity bit */ 1121 | CBAUD /* clear current baud rate */ 1122 | CBAUDEX); /* clear current buad rate */ 1123 1124 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1125 1126 /* baud rate 115200 */ 1127 tty_encode_baud_rate(tty, 115200, 115200); 1128 } 1129 1130 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1131 { 1132 int result; 1133 /* We are done with this URB, resubmit it. Prep the USB to wait for 1134 * another frame */ 1135 usb_fill_bulk_urb(urb, serial->parent->usb, 1136 usb_rcvbulkpipe(serial->parent->usb, 1137 serial->in_endp-> 1138 bEndpointAddress & 0x7F), 1139 urb->transfer_buffer, serial->rx_data_length, 1140 hso_std_serial_read_bulk_callback, serial); 1141 /* Give this to the USB subsystem so it can tell us when more data 1142 * arrives. */ 1143 result = usb_submit_urb(urb, GFP_ATOMIC); 1144 if (result) { 1145 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1146 __func__, result); 1147 } 1148 } 1149 1150 1151 1152 1153 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1154 { 1155 int count; 1156 struct urb *curr_urb; 1157 1158 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1159 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1160 count = put_rxbuf_data(curr_urb, serial); 1161 if (count == -1) 1162 return; 1163 if (count == 0) { 1164 serial->curr_rx_urb_idx++; 1165 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1166 serial->curr_rx_urb_idx = 0; 1167 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1168 } 1169 } 1170 } 1171 1172 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1173 { 1174 int count = 0; 1175 struct urb *urb; 1176 1177 urb = serial->rx_urb[0]; 1178 if (serial->port.count > 0) { 1179 count = put_rxbuf_data(urb, serial); 1180 if (count == -1) 1181 return; 1182 } 1183 /* Re issue a read as long as we receive data. */ 1184 1185 if (count == 0 && ((urb->actual_length != 0) || 1186 (serial->rx_state == RX_PENDING))) { 1187 serial->rx_state = RX_SENT; 1188 hso_mux_serial_read(serial); 1189 } else 1190 serial->rx_state = RX_IDLE; 1191 } 1192 1193 1194 /* read callback for Diag and CS port */ 1195 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1196 { 1197 struct hso_serial *serial = urb->context; 1198 int status = urb->status; 1199 1200 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1201 1202 /* sanity check */ 1203 if (!serial) { 1204 hso_dbg(0x1, "serial == NULL\n"); 1205 return; 1206 } 1207 if (status) { 1208 handle_usb_error(status, __func__, serial->parent); 1209 return; 1210 } 1211 1212 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1213 DUMP1(urb->transfer_buffer, urb->actual_length); 1214 1215 /* Anyone listening? */ 1216 if (serial->port.count == 0) 1217 return; 1218 1219 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1220 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1221 /* Valid data, handle RX data */ 1222 spin_lock(&serial->serial_lock); 1223 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1224 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1225 spin_unlock(&serial->serial_lock); 1226 } 1227 1228 /* 1229 * This needs to be a tasklet otherwise we will 1230 * end up recursively calling this function. 1231 */ 1232 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1233 { 1234 unsigned long flags; 1235 1236 spin_lock_irqsave(&serial->serial_lock, flags); 1237 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1238 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1239 else 1240 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1241 spin_unlock_irqrestore(&serial->serial_lock, flags); 1242 } 1243 1244 static void hso_unthrottle(struct tty_struct *tty) 1245 { 1246 struct hso_serial *serial = tty->driver_data; 1247 1248 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1249 } 1250 1251 /* open the requested serial port */ 1252 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1253 { 1254 struct hso_serial *serial = get_serial_by_index(tty->index); 1255 int result; 1256 1257 /* sanity check */ 1258 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1259 WARN_ON(1); 1260 tty->driver_data = NULL; 1261 hso_dbg(0x1, "Failed to open port\n"); 1262 return -ENODEV; 1263 } 1264 1265 mutex_lock(&serial->parent->mutex); 1266 result = usb_autopm_get_interface(serial->parent->interface); 1267 if (result < 0) 1268 goto err_out; 1269 1270 hso_dbg(0x1, "Opening %d\n", serial->minor); 1271 1272 /* setup */ 1273 tty->driver_data = serial; 1274 tty_port_tty_set(&serial->port, tty); 1275 1276 /* check for port already opened, if not set the termios */ 1277 serial->port.count++; 1278 if (serial->port.count == 1) { 1279 serial->rx_state = RX_IDLE; 1280 /* Force default termio settings */ 1281 _hso_serial_set_termios(tty, NULL); 1282 tasklet_init(&serial->unthrottle_tasklet, 1283 (void (*)(unsigned long))hso_unthrottle_tasklet, 1284 (unsigned long)serial); 1285 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1286 if (result) { 1287 hso_stop_serial_device(serial->parent); 1288 serial->port.count--; 1289 } else { 1290 kref_get(&serial->parent->ref); 1291 } 1292 } else { 1293 hso_dbg(0x1, "Port was already open\n"); 1294 } 1295 1296 usb_autopm_put_interface(serial->parent->interface); 1297 1298 /* done */ 1299 if (result) 1300 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1301 err_out: 1302 mutex_unlock(&serial->parent->mutex); 1303 return result; 1304 } 1305 1306 /* close the requested serial port */ 1307 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1308 { 1309 struct hso_serial *serial = tty->driver_data; 1310 u8 usb_gone; 1311 1312 hso_dbg(0x1, "Closing serial port\n"); 1313 1314 /* Open failed, no close cleanup required */ 1315 if (serial == NULL) 1316 return; 1317 1318 mutex_lock(&serial->parent->mutex); 1319 usb_gone = serial->parent->usb_gone; 1320 1321 if (!usb_gone) 1322 usb_autopm_get_interface(serial->parent->interface); 1323 1324 /* reset the rts and dtr */ 1325 /* do the actual close */ 1326 serial->port.count--; 1327 1328 if (serial->port.count <= 0) { 1329 serial->port.count = 0; 1330 tty_port_tty_set(&serial->port, NULL); 1331 if (!usb_gone) 1332 hso_stop_serial_device(serial->parent); 1333 tasklet_kill(&serial->unthrottle_tasklet); 1334 } 1335 1336 if (!usb_gone) 1337 usb_autopm_put_interface(serial->parent->interface); 1338 1339 mutex_unlock(&serial->parent->mutex); 1340 } 1341 1342 /* close the requested serial port */ 1343 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1344 int count) 1345 { 1346 struct hso_serial *serial = tty->driver_data; 1347 int space, tx_bytes; 1348 unsigned long flags; 1349 1350 /* sanity check */ 1351 if (serial == NULL) { 1352 pr_err("%s: serial is NULL\n", __func__); 1353 return -ENODEV; 1354 } 1355 1356 spin_lock_irqsave(&serial->serial_lock, flags); 1357 1358 space = serial->tx_data_length - serial->tx_buffer_count; 1359 tx_bytes = (count < space) ? count : space; 1360 1361 if (!tx_bytes) 1362 goto out; 1363 1364 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1365 serial->tx_buffer_count += tx_bytes; 1366 1367 out: 1368 spin_unlock_irqrestore(&serial->serial_lock, flags); 1369 1370 hso_kick_transmit(serial); 1371 /* done */ 1372 return tx_bytes; 1373 } 1374 1375 /* how much room is there for writing */ 1376 static int hso_serial_write_room(struct tty_struct *tty) 1377 { 1378 struct hso_serial *serial = tty->driver_data; 1379 int room; 1380 unsigned long flags; 1381 1382 spin_lock_irqsave(&serial->serial_lock, flags); 1383 room = serial->tx_data_length - serial->tx_buffer_count; 1384 spin_unlock_irqrestore(&serial->serial_lock, flags); 1385 1386 /* return free room */ 1387 return room; 1388 } 1389 1390 static void hso_serial_cleanup(struct tty_struct *tty) 1391 { 1392 struct hso_serial *serial = tty->driver_data; 1393 1394 if (!serial) 1395 return; 1396 1397 kref_put(&serial->parent->ref, hso_serial_ref_free); 1398 } 1399 1400 /* setup the term */ 1401 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1402 { 1403 struct hso_serial *serial = tty->driver_data; 1404 unsigned long flags; 1405 1406 if (old) 1407 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n", 1408 tty->termios.c_cflag, old->c_cflag); 1409 1410 /* the actual setup */ 1411 spin_lock_irqsave(&serial->serial_lock, flags); 1412 if (serial->port.count) 1413 _hso_serial_set_termios(tty, old); 1414 else 1415 tty->termios = *old; 1416 spin_unlock_irqrestore(&serial->serial_lock, flags); 1417 1418 /* done */ 1419 } 1420 1421 /* how many characters in the buffer */ 1422 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1423 { 1424 struct hso_serial *serial = tty->driver_data; 1425 int chars; 1426 unsigned long flags; 1427 1428 /* sanity check */ 1429 if (serial == NULL) 1430 return 0; 1431 1432 spin_lock_irqsave(&serial->serial_lock, flags); 1433 chars = serial->tx_buffer_count; 1434 spin_unlock_irqrestore(&serial->serial_lock, flags); 1435 1436 return chars; 1437 } 1438 static int tiocmget_submit_urb(struct hso_serial *serial, 1439 struct hso_tiocmget *tiocmget, 1440 struct usb_device *usb) 1441 { 1442 int result; 1443 1444 if (serial->parent->usb_gone) 1445 return -ENODEV; 1446 usb_fill_int_urb(tiocmget->urb, usb, 1447 usb_rcvintpipe(usb, 1448 tiocmget->endp-> 1449 bEndpointAddress & 0x7F), 1450 &tiocmget->serial_state_notification, 1451 sizeof(struct hso_serial_state_notification), 1452 tiocmget_intr_callback, serial, 1453 tiocmget->endp->bInterval); 1454 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1455 if (result) { 1456 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1457 result); 1458 } 1459 return result; 1460 1461 } 1462 1463 static void tiocmget_intr_callback(struct urb *urb) 1464 { 1465 struct hso_serial *serial = urb->context; 1466 struct hso_tiocmget *tiocmget; 1467 int status = urb->status; 1468 u16 UART_state_bitmap, prev_UART_state_bitmap; 1469 struct uart_icount *icount; 1470 struct hso_serial_state_notification *serial_state_notification; 1471 struct usb_device *usb; 1472 struct usb_interface *interface; 1473 int if_num; 1474 1475 /* Sanity checks */ 1476 if (!serial) 1477 return; 1478 if (status) { 1479 handle_usb_error(status, __func__, serial->parent); 1480 return; 1481 } 1482 1483 /* tiocmget is only supported on HSO_PORT_MODEM */ 1484 tiocmget = serial->tiocmget; 1485 if (!tiocmget) 1486 return; 1487 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1488 1489 usb = serial->parent->usb; 1490 interface = serial->parent->interface; 1491 1492 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1493 1494 /* wIndex should be the USB interface number of the port to which the 1495 * notification applies, which should always be the Modem port. 1496 */ 1497 serial_state_notification = &tiocmget->serial_state_notification; 1498 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1499 serial_state_notification->bNotification != B_NOTIFICATION || 1500 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1501 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1502 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1503 dev_warn(&usb->dev, 1504 "hso received invalid serial state notification\n"); 1505 DUMP(serial_state_notification, 1506 sizeof(struct hso_serial_state_notification)); 1507 } else { 1508 1509 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1510 UART_state_bitmap); 1511 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1512 icount = &tiocmget->icount; 1513 spin_lock(&serial->serial_lock); 1514 if ((UART_state_bitmap & B_OVERRUN) != 1515 (prev_UART_state_bitmap & B_OVERRUN)) 1516 icount->parity++; 1517 if ((UART_state_bitmap & B_PARITY) != 1518 (prev_UART_state_bitmap & B_PARITY)) 1519 icount->parity++; 1520 if ((UART_state_bitmap & B_FRAMING) != 1521 (prev_UART_state_bitmap & B_FRAMING)) 1522 icount->frame++; 1523 if ((UART_state_bitmap & B_RING_SIGNAL) && 1524 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1525 icount->rng++; 1526 if ((UART_state_bitmap & B_BREAK) != 1527 (prev_UART_state_bitmap & B_BREAK)) 1528 icount->brk++; 1529 if ((UART_state_bitmap & B_TX_CARRIER) != 1530 (prev_UART_state_bitmap & B_TX_CARRIER)) 1531 icount->dsr++; 1532 if ((UART_state_bitmap & B_RX_CARRIER) != 1533 (prev_UART_state_bitmap & B_RX_CARRIER)) 1534 icount->dcd++; 1535 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1536 spin_unlock(&serial->serial_lock); 1537 tiocmget->intr_completed = 1; 1538 wake_up_interruptible(&tiocmget->waitq); 1539 } 1540 memset(serial_state_notification, 0, 1541 sizeof(struct hso_serial_state_notification)); 1542 tiocmget_submit_urb(serial, 1543 tiocmget, 1544 serial->parent->usb); 1545 } 1546 1547 /* 1548 * next few functions largely stolen from drivers/serial/serial_core.c 1549 */ 1550 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1551 * - mask passed in arg for lines of interest 1552 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1553 * Caller should use TIOCGICOUNT to see which one it was 1554 */ 1555 static int 1556 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1557 { 1558 DECLARE_WAITQUEUE(wait, current); 1559 struct uart_icount cprev, cnow; 1560 struct hso_tiocmget *tiocmget; 1561 int ret; 1562 1563 tiocmget = serial->tiocmget; 1564 if (!tiocmget) 1565 return -ENOENT; 1566 /* 1567 * note the counters on entry 1568 */ 1569 spin_lock_irq(&serial->serial_lock); 1570 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1571 spin_unlock_irq(&serial->serial_lock); 1572 add_wait_queue(&tiocmget->waitq, &wait); 1573 for (;;) { 1574 spin_lock_irq(&serial->serial_lock); 1575 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1576 spin_unlock_irq(&serial->serial_lock); 1577 set_current_state(TASK_INTERRUPTIBLE); 1578 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1579 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1580 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1581 ret = 0; 1582 break; 1583 } 1584 schedule(); 1585 /* see if a signal did it */ 1586 if (signal_pending(current)) { 1587 ret = -ERESTARTSYS; 1588 break; 1589 } 1590 cprev = cnow; 1591 } 1592 __set_current_state(TASK_RUNNING); 1593 remove_wait_queue(&tiocmget->waitq, &wait); 1594 1595 return ret; 1596 } 1597 1598 /* 1599 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1600 * Return: write counters to the user passed counter struct 1601 * NB: both 1->0 and 0->1 transitions are counted except for 1602 * RI where only 0->1 is counted. 1603 */ 1604 static int hso_get_count(struct tty_struct *tty, 1605 struct serial_icounter_struct *icount) 1606 { 1607 struct uart_icount cnow; 1608 struct hso_serial *serial = tty->driver_data; 1609 struct hso_tiocmget *tiocmget = serial->tiocmget; 1610 1611 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1612 1613 if (!tiocmget) 1614 return -ENOENT; 1615 spin_lock_irq(&serial->serial_lock); 1616 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1617 spin_unlock_irq(&serial->serial_lock); 1618 1619 icount->cts = cnow.cts; 1620 icount->dsr = cnow.dsr; 1621 icount->rng = cnow.rng; 1622 icount->dcd = cnow.dcd; 1623 icount->rx = cnow.rx; 1624 icount->tx = cnow.tx; 1625 icount->frame = cnow.frame; 1626 icount->overrun = cnow.overrun; 1627 icount->parity = cnow.parity; 1628 icount->brk = cnow.brk; 1629 icount->buf_overrun = cnow.buf_overrun; 1630 1631 return 0; 1632 } 1633 1634 1635 static int hso_serial_tiocmget(struct tty_struct *tty) 1636 { 1637 int retval; 1638 struct hso_serial *serial = tty->driver_data; 1639 struct hso_tiocmget *tiocmget; 1640 u16 UART_state_bitmap; 1641 1642 /* sanity check */ 1643 if (!serial) { 1644 hso_dbg(0x1, "no tty structures\n"); 1645 return -EINVAL; 1646 } 1647 spin_lock_irq(&serial->serial_lock); 1648 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1649 ((serial->dtr_state) ? TIOCM_DTR : 0); 1650 tiocmget = serial->tiocmget; 1651 if (tiocmget) { 1652 1653 UART_state_bitmap = le16_to_cpu( 1654 tiocmget->prev_UART_state_bitmap); 1655 if (UART_state_bitmap & B_RING_SIGNAL) 1656 retval |= TIOCM_RNG; 1657 if (UART_state_bitmap & B_RX_CARRIER) 1658 retval |= TIOCM_CD; 1659 if (UART_state_bitmap & B_TX_CARRIER) 1660 retval |= TIOCM_DSR; 1661 } 1662 spin_unlock_irq(&serial->serial_lock); 1663 return retval; 1664 } 1665 1666 static int hso_serial_tiocmset(struct tty_struct *tty, 1667 unsigned int set, unsigned int clear) 1668 { 1669 int val = 0; 1670 unsigned long flags; 1671 int if_num; 1672 struct hso_serial *serial = tty->driver_data; 1673 struct usb_interface *interface; 1674 1675 /* sanity check */ 1676 if (!serial) { 1677 hso_dbg(0x1, "no tty structures\n"); 1678 return -EINVAL; 1679 } 1680 1681 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1682 return -EINVAL; 1683 1684 interface = serial->parent->interface; 1685 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1686 1687 spin_lock_irqsave(&serial->serial_lock, flags); 1688 if (set & TIOCM_RTS) 1689 serial->rts_state = 1; 1690 if (set & TIOCM_DTR) 1691 serial->dtr_state = 1; 1692 1693 if (clear & TIOCM_RTS) 1694 serial->rts_state = 0; 1695 if (clear & TIOCM_DTR) 1696 serial->dtr_state = 0; 1697 1698 if (serial->dtr_state) 1699 val |= 0x01; 1700 if (serial->rts_state) 1701 val |= 0x02; 1702 1703 spin_unlock_irqrestore(&serial->serial_lock, flags); 1704 1705 return usb_control_msg(serial->parent->usb, 1706 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1707 0x21, val, if_num, NULL, 0, 1708 USB_CTRL_SET_TIMEOUT); 1709 } 1710 1711 static int hso_serial_ioctl(struct tty_struct *tty, 1712 unsigned int cmd, unsigned long arg) 1713 { 1714 struct hso_serial *serial = tty->driver_data; 1715 int ret = 0; 1716 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1717 1718 if (!serial) 1719 return -ENODEV; 1720 switch (cmd) { 1721 case TIOCMIWAIT: 1722 ret = hso_wait_modem_status(serial, arg); 1723 break; 1724 default: 1725 ret = -ENOIOCTLCMD; 1726 break; 1727 } 1728 return ret; 1729 } 1730 1731 1732 /* starts a transmit */ 1733 static void hso_kick_transmit(struct hso_serial *serial) 1734 { 1735 u8 *temp; 1736 unsigned long flags; 1737 int res; 1738 1739 spin_lock_irqsave(&serial->serial_lock, flags); 1740 if (!serial->tx_buffer_count) 1741 goto out; 1742 1743 if (serial->tx_urb_used) 1744 goto out; 1745 1746 /* Wakeup USB interface if necessary */ 1747 if (hso_get_activity(serial->parent) == -EAGAIN) 1748 goto out; 1749 1750 /* Switch pointers around to avoid memcpy */ 1751 temp = serial->tx_buffer; 1752 serial->tx_buffer = serial->tx_data; 1753 serial->tx_data = temp; 1754 serial->tx_data_count = serial->tx_buffer_count; 1755 serial->tx_buffer_count = 0; 1756 1757 /* If temp is set, it means we switched buffers */ 1758 if (temp && serial->write_data) { 1759 res = serial->write_data(serial); 1760 if (res >= 0) 1761 serial->tx_urb_used = 1; 1762 } 1763 out: 1764 spin_unlock_irqrestore(&serial->serial_lock, flags); 1765 } 1766 1767 /* make a request (for reading and writing data to muxed serial port) */ 1768 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1769 struct urb *ctrl_urb, 1770 struct usb_ctrlrequest *ctrl_req, 1771 u8 *ctrl_urb_data, u32 size) 1772 { 1773 int result; 1774 int pipe; 1775 1776 /* Sanity check */ 1777 if (!serial || !ctrl_urb || !ctrl_req) { 1778 pr_err("%s: Wrong arguments\n", __func__); 1779 return -EINVAL; 1780 } 1781 1782 /* initialize */ 1783 ctrl_req->wValue = 0; 1784 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1785 ctrl_req->wLength = cpu_to_le16(size); 1786 1787 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1788 /* Reading command */ 1789 ctrl_req->bRequestType = USB_DIR_IN | 1790 USB_TYPE_OPTION_VENDOR | 1791 USB_RECIP_INTERFACE; 1792 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1793 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1794 } else { 1795 /* Writing command */ 1796 ctrl_req->bRequestType = USB_DIR_OUT | 1797 USB_TYPE_OPTION_VENDOR | 1798 USB_RECIP_INTERFACE; 1799 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1800 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1801 } 1802 /* syslog */ 1803 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1804 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1805 ctrl_req->bRequestType, ctrl_req->wLength, port); 1806 1807 /* Load ctrl urb */ 1808 ctrl_urb->transfer_flags = 0; 1809 usb_fill_control_urb(ctrl_urb, 1810 serial->parent->usb, 1811 pipe, 1812 (u8 *) ctrl_req, 1813 ctrl_urb_data, size, ctrl_callback, serial); 1814 /* Send it on merry way */ 1815 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1816 if (result) { 1817 dev_err(&ctrl_urb->dev->dev, 1818 "%s failed submit ctrl_urb %d type %d\n", __func__, 1819 result, type); 1820 return result; 1821 } 1822 1823 /* done */ 1824 return size; 1825 } 1826 1827 /* called by intr_callback when read occurs */ 1828 static int hso_mux_serial_read(struct hso_serial *serial) 1829 { 1830 if (!serial) 1831 return -EINVAL; 1832 1833 /* clean data */ 1834 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1835 /* make the request */ 1836 1837 if (serial->num_rx_urbs != 1) { 1838 dev_err(&serial->parent->interface->dev, 1839 "ERROR: mux'd reads with multiple buffers " 1840 "not possible\n"); 1841 return 0; 1842 } 1843 return mux_device_request(serial, 1844 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1845 serial->parent->port_spec & HSO_PORT_MASK, 1846 serial->rx_urb[0], 1847 &serial->ctrl_req_rx, 1848 serial->rx_data[0], serial->rx_data_length); 1849 } 1850 1851 /* used for muxed serial port callback (muxed serial read) */ 1852 static void intr_callback(struct urb *urb) 1853 { 1854 struct hso_shared_int *shared_int = urb->context; 1855 struct hso_serial *serial; 1856 unsigned char *port_req; 1857 int status = urb->status; 1858 int i; 1859 1860 usb_mark_last_busy(urb->dev); 1861 1862 /* sanity check */ 1863 if (!shared_int) 1864 return; 1865 1866 /* status check */ 1867 if (status) { 1868 handle_usb_error(status, __func__, NULL); 1869 return; 1870 } 1871 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1872 1873 /* what request? */ 1874 port_req = urb->transfer_buffer; 1875 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1876 /* loop over all muxed ports to find the one sending this */ 1877 for (i = 0; i < 8; i++) { 1878 /* max 8 channels on MUX */ 1879 if (*port_req & (1 << i)) { 1880 serial = get_serial_by_shared_int_and_type(shared_int, 1881 (1 << i)); 1882 if (serial != NULL) { 1883 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1884 i); 1885 spin_lock(&serial->serial_lock); 1886 if (serial->rx_state == RX_IDLE && 1887 serial->port.count > 0) { 1888 /* Setup and send a ctrl req read on 1889 * port i */ 1890 if (!serial->rx_urb_filled[0]) { 1891 serial->rx_state = RX_SENT; 1892 hso_mux_serial_read(serial); 1893 } else 1894 serial->rx_state = RX_PENDING; 1895 } else { 1896 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1897 i); 1898 } 1899 spin_unlock(&serial->serial_lock); 1900 } 1901 } 1902 } 1903 /* Resubmit interrupt urb */ 1904 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1905 } 1906 1907 /* called for writing to muxed serial port */ 1908 static int hso_mux_serial_write_data(struct hso_serial *serial) 1909 { 1910 if (NULL == serial) 1911 return -EINVAL; 1912 1913 return mux_device_request(serial, 1914 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1915 serial->parent->port_spec & HSO_PORT_MASK, 1916 serial->tx_urb, 1917 &serial->ctrl_req_tx, 1918 serial->tx_data, serial->tx_data_count); 1919 } 1920 1921 /* write callback for Diag and CS port */ 1922 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1923 { 1924 struct hso_serial *serial = urb->context; 1925 int status = urb->status; 1926 1927 /* sanity check */ 1928 if (!serial) { 1929 hso_dbg(0x1, "serial == NULL\n"); 1930 return; 1931 } 1932 1933 spin_lock(&serial->serial_lock); 1934 serial->tx_urb_used = 0; 1935 spin_unlock(&serial->serial_lock); 1936 if (status) { 1937 handle_usb_error(status, __func__, serial->parent); 1938 return; 1939 } 1940 hso_put_activity(serial->parent); 1941 tty_port_tty_wakeup(&serial->port); 1942 hso_kick_transmit(serial); 1943 1944 hso_dbg(0x1, "\n"); 1945 } 1946 1947 /* called for writing diag or CS serial port */ 1948 static int hso_std_serial_write_data(struct hso_serial *serial) 1949 { 1950 int count = serial->tx_data_count; 1951 int result; 1952 1953 usb_fill_bulk_urb(serial->tx_urb, 1954 serial->parent->usb, 1955 usb_sndbulkpipe(serial->parent->usb, 1956 serial->out_endp-> 1957 bEndpointAddress & 0x7F), 1958 serial->tx_data, serial->tx_data_count, 1959 hso_std_serial_write_bulk_callback, serial); 1960 1961 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1962 if (result) { 1963 dev_warn(&serial->parent->usb->dev, 1964 "Failed to submit urb - res %d\n", result); 1965 return result; 1966 } 1967 1968 return count; 1969 } 1970 1971 /* callback after read or write on muxed serial port */ 1972 static void ctrl_callback(struct urb *urb) 1973 { 1974 struct hso_serial *serial = urb->context; 1975 struct usb_ctrlrequest *req; 1976 int status = urb->status; 1977 1978 /* sanity check */ 1979 if (!serial) 1980 return; 1981 1982 spin_lock(&serial->serial_lock); 1983 serial->tx_urb_used = 0; 1984 spin_unlock(&serial->serial_lock); 1985 if (status) { 1986 handle_usb_error(status, __func__, serial->parent); 1987 return; 1988 } 1989 1990 /* what request? */ 1991 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1992 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1993 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1994 DUMP1(urb->transfer_buffer, urb->actual_length); 1995 1996 if (req->bRequestType == 1997 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1998 /* response to a read command */ 1999 serial->rx_urb_filled[0] = 1; 2000 spin_lock(&serial->serial_lock); 2001 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2002 spin_unlock(&serial->serial_lock); 2003 } else { 2004 hso_put_activity(serial->parent); 2005 tty_port_tty_wakeup(&serial->port); 2006 /* response to a write command */ 2007 hso_kick_transmit(serial); 2008 } 2009 } 2010 2011 /* handle RX data for serial port */ 2012 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2013 { 2014 struct tty_struct *tty; 2015 int count; 2016 2017 /* Sanity check */ 2018 if (urb == NULL || serial == NULL) { 2019 hso_dbg(0x1, "serial = NULL\n"); 2020 return -2; 2021 } 2022 2023 tty = tty_port_tty_get(&serial->port); 2024 2025 if (tty && tty_throttled(tty)) { 2026 tty_kref_put(tty); 2027 return -1; 2028 } 2029 2030 /* Push data to tty */ 2031 hso_dbg(0x1, "data to push to tty\n"); 2032 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2033 if (count >= urb->actual_length) { 2034 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2035 urb->actual_length); 2036 tty_flip_buffer_push(&serial->port); 2037 } else { 2038 dev_warn(&serial->parent->usb->dev, 2039 "dropping data, %d bytes lost\n", urb->actual_length); 2040 } 2041 2042 tty_kref_put(tty); 2043 2044 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2045 2046 return 0; 2047 } 2048 2049 2050 /* Base driver functions */ 2051 2052 static void hso_log_port(struct hso_device *hso_dev) 2053 { 2054 char *port_type; 2055 char port_dev[20]; 2056 2057 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2058 case HSO_PORT_CONTROL: 2059 port_type = "Control"; 2060 break; 2061 case HSO_PORT_APP: 2062 port_type = "Application"; 2063 break; 2064 case HSO_PORT_GPS: 2065 port_type = "GPS"; 2066 break; 2067 case HSO_PORT_GPS_CONTROL: 2068 port_type = "GPS control"; 2069 break; 2070 case HSO_PORT_APP2: 2071 port_type = "Application2"; 2072 break; 2073 case HSO_PORT_PCSC: 2074 port_type = "PCSC"; 2075 break; 2076 case HSO_PORT_DIAG: 2077 port_type = "Diagnostic"; 2078 break; 2079 case HSO_PORT_DIAG2: 2080 port_type = "Diagnostic2"; 2081 break; 2082 case HSO_PORT_MODEM: 2083 port_type = "Modem"; 2084 break; 2085 case HSO_PORT_NETWORK: 2086 port_type = "Network"; 2087 break; 2088 default: 2089 port_type = "Unknown"; 2090 break; 2091 } 2092 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2093 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2094 } else 2095 sprintf(port_dev, "/dev/%s%d", tty_filename, 2096 dev2ser(hso_dev)->minor); 2097 2098 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2099 port_type, port_dev); 2100 } 2101 2102 static int hso_start_net_device(struct hso_device *hso_dev) 2103 { 2104 int i, result = 0; 2105 struct hso_net *hso_net = dev2net(hso_dev); 2106 2107 if (!hso_net) 2108 return -ENODEV; 2109 2110 /* send URBs for all read buffers */ 2111 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2112 2113 /* Prep a receive URB */ 2114 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2115 hso_dev->usb, 2116 usb_rcvbulkpipe(hso_dev->usb, 2117 hso_net->in_endp-> 2118 bEndpointAddress & 0x7F), 2119 hso_net->mux_bulk_rx_buf_pool[i], 2120 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2121 hso_net); 2122 2123 /* Put it out there so the device can send us stuff */ 2124 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2125 GFP_NOIO); 2126 if (result) 2127 dev_warn(&hso_dev->usb->dev, 2128 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2129 i, result); 2130 } 2131 2132 return result; 2133 } 2134 2135 static int hso_stop_net_device(struct hso_device *hso_dev) 2136 { 2137 int i; 2138 struct hso_net *hso_net = dev2net(hso_dev); 2139 2140 if (!hso_net) 2141 return -ENODEV; 2142 2143 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2144 if (hso_net->mux_bulk_rx_urb_pool[i]) 2145 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2146 2147 } 2148 if (hso_net->mux_bulk_tx_urb) 2149 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2150 2151 return 0; 2152 } 2153 2154 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2155 { 2156 int i, result = 0; 2157 struct hso_serial *serial = dev2ser(hso_dev); 2158 2159 if (!serial) 2160 return -ENODEV; 2161 2162 /* If it is not the MUX port fill in and submit a bulk urb (already 2163 * allocated in hso_serial_start) */ 2164 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2165 for (i = 0; i < serial->num_rx_urbs; i++) { 2166 usb_fill_bulk_urb(serial->rx_urb[i], 2167 serial->parent->usb, 2168 usb_rcvbulkpipe(serial->parent->usb, 2169 serial->in_endp-> 2170 bEndpointAddress & 2171 0x7F), 2172 serial->rx_data[i], 2173 serial->rx_data_length, 2174 hso_std_serial_read_bulk_callback, 2175 serial); 2176 result = usb_submit_urb(serial->rx_urb[i], flags); 2177 if (result) { 2178 dev_warn(&serial->parent->usb->dev, 2179 "Failed to submit urb - res %d\n", 2180 result); 2181 break; 2182 } 2183 } 2184 } else { 2185 mutex_lock(&serial->shared_int->shared_int_lock); 2186 if (!serial->shared_int->use_count) { 2187 result = 2188 hso_mux_submit_intr_urb(serial->shared_int, 2189 hso_dev->usb, flags); 2190 } 2191 serial->shared_int->use_count++; 2192 mutex_unlock(&serial->shared_int->shared_int_lock); 2193 } 2194 if (serial->tiocmget) 2195 tiocmget_submit_urb(serial, 2196 serial->tiocmget, 2197 serial->parent->usb); 2198 return result; 2199 } 2200 2201 static int hso_stop_serial_device(struct hso_device *hso_dev) 2202 { 2203 int i; 2204 struct hso_serial *serial = dev2ser(hso_dev); 2205 struct hso_tiocmget *tiocmget; 2206 2207 if (!serial) 2208 return -ENODEV; 2209 2210 for (i = 0; i < serial->num_rx_urbs; i++) { 2211 if (serial->rx_urb[i]) { 2212 usb_kill_urb(serial->rx_urb[i]); 2213 serial->rx_urb_filled[i] = 0; 2214 } 2215 } 2216 serial->curr_rx_urb_idx = 0; 2217 2218 if (serial->tx_urb) 2219 usb_kill_urb(serial->tx_urb); 2220 2221 if (serial->shared_int) { 2222 mutex_lock(&serial->shared_int->shared_int_lock); 2223 if (serial->shared_int->use_count && 2224 (--serial->shared_int->use_count == 0)) { 2225 struct urb *urb; 2226 2227 urb = serial->shared_int->shared_intr_urb; 2228 if (urb) 2229 usb_kill_urb(urb); 2230 } 2231 mutex_unlock(&serial->shared_int->shared_int_lock); 2232 } 2233 tiocmget = serial->tiocmget; 2234 if (tiocmget) { 2235 wake_up_interruptible(&tiocmget->waitq); 2236 usb_kill_urb(tiocmget->urb); 2237 } 2238 2239 return 0; 2240 } 2241 2242 static void hso_serial_tty_unregister(struct hso_serial *serial) 2243 { 2244 tty_unregister_device(tty_drv, serial->minor); 2245 } 2246 2247 static void hso_serial_common_free(struct hso_serial *serial) 2248 { 2249 int i; 2250 2251 for (i = 0; i < serial->num_rx_urbs; i++) { 2252 /* unlink and free RX URB */ 2253 usb_free_urb(serial->rx_urb[i]); 2254 /* free the RX buffer */ 2255 kfree(serial->rx_data[i]); 2256 } 2257 2258 /* unlink and free TX URB */ 2259 usb_free_urb(serial->tx_urb); 2260 kfree(serial->tx_buffer); 2261 kfree(serial->tx_data); 2262 tty_port_destroy(&serial->port); 2263 } 2264 2265 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2266 int rx_size, int tx_size) 2267 { 2268 struct device *dev; 2269 int minor; 2270 int i; 2271 2272 tty_port_init(&serial->port); 2273 2274 minor = get_free_serial_index(); 2275 if (minor < 0) 2276 goto exit; 2277 2278 /* register our minor number */ 2279 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2280 tty_drv, minor, &serial->parent->interface->dev, 2281 serial->parent, hso_serial_dev_groups); 2282 dev = serial->parent->dev; 2283 2284 /* fill in specific data for later use */ 2285 serial->minor = minor; 2286 serial->magic = HSO_SERIAL_MAGIC; 2287 spin_lock_init(&serial->serial_lock); 2288 serial->num_rx_urbs = num_urbs; 2289 2290 /* RX, allocate urb and initialize */ 2291 2292 /* prepare our RX buffer */ 2293 serial->rx_data_length = rx_size; 2294 for (i = 0; i < serial->num_rx_urbs; i++) { 2295 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2296 if (!serial->rx_urb[i]) 2297 goto exit; 2298 serial->rx_urb[i]->transfer_buffer = NULL; 2299 serial->rx_urb[i]->transfer_buffer_length = 0; 2300 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2301 GFP_KERNEL); 2302 if (!serial->rx_data[i]) 2303 goto exit; 2304 } 2305 2306 /* TX, allocate urb and initialize */ 2307 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2308 if (!serial->tx_urb) 2309 goto exit; 2310 serial->tx_urb->transfer_buffer = NULL; 2311 serial->tx_urb->transfer_buffer_length = 0; 2312 /* prepare our TX buffer */ 2313 serial->tx_data_count = 0; 2314 serial->tx_buffer_count = 0; 2315 serial->tx_data_length = tx_size; 2316 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2317 if (!serial->tx_data) 2318 goto exit; 2319 2320 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2321 if (!serial->tx_buffer) 2322 goto exit; 2323 2324 return 0; 2325 exit: 2326 hso_serial_tty_unregister(serial); 2327 hso_serial_common_free(serial); 2328 return -1; 2329 } 2330 2331 /* Creates a general hso device */ 2332 static struct hso_device *hso_create_device(struct usb_interface *intf, 2333 int port_spec) 2334 { 2335 struct hso_device *hso_dev; 2336 2337 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2338 if (!hso_dev) 2339 return NULL; 2340 2341 hso_dev->port_spec = port_spec; 2342 hso_dev->usb = interface_to_usbdev(intf); 2343 hso_dev->interface = intf; 2344 kref_init(&hso_dev->ref); 2345 mutex_init(&hso_dev->mutex); 2346 2347 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2348 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2349 2350 return hso_dev; 2351 } 2352 2353 /* Removes a network device in the network device table */ 2354 static int remove_net_device(struct hso_device *hso_dev) 2355 { 2356 int i; 2357 2358 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2359 if (network_table[i] == hso_dev) { 2360 network_table[i] = NULL; 2361 break; 2362 } 2363 } 2364 if (i == HSO_MAX_NET_DEVICES) 2365 return -1; 2366 return 0; 2367 } 2368 2369 /* Frees our network device */ 2370 static void hso_free_net_device(struct hso_device *hso_dev) 2371 { 2372 int i; 2373 struct hso_net *hso_net = dev2net(hso_dev); 2374 2375 if (!hso_net) 2376 return; 2377 2378 remove_net_device(hso_net->parent); 2379 2380 if (hso_net->net) 2381 unregister_netdev(hso_net->net); 2382 2383 /* start freeing */ 2384 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2385 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2386 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2387 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2388 } 2389 usb_free_urb(hso_net->mux_bulk_tx_urb); 2390 kfree(hso_net->mux_bulk_tx_buf); 2391 hso_net->mux_bulk_tx_buf = NULL; 2392 2393 if (hso_net->net) 2394 free_netdev(hso_net->net); 2395 2396 kfree(hso_dev); 2397 } 2398 2399 static const struct net_device_ops hso_netdev_ops = { 2400 .ndo_open = hso_net_open, 2401 .ndo_stop = hso_net_close, 2402 .ndo_start_xmit = hso_net_start_xmit, 2403 .ndo_tx_timeout = hso_net_tx_timeout, 2404 }; 2405 2406 /* initialize the network interface */ 2407 static void hso_net_init(struct net_device *net) 2408 { 2409 struct hso_net *hso_net = netdev_priv(net); 2410 2411 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2412 2413 /* fill in the other fields */ 2414 net->netdev_ops = &hso_netdev_ops; 2415 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2416 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2417 net->type = ARPHRD_NONE; 2418 net->mtu = DEFAULT_MTU - 14; 2419 net->tx_queue_len = 10; 2420 net->ethtool_ops = &ops; 2421 2422 /* and initialize the semaphore */ 2423 spin_lock_init(&hso_net->net_lock); 2424 } 2425 2426 /* Adds a network device in the network device table */ 2427 static int add_net_device(struct hso_device *hso_dev) 2428 { 2429 int i; 2430 2431 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2432 if (network_table[i] == NULL) { 2433 network_table[i] = hso_dev; 2434 break; 2435 } 2436 } 2437 if (i == HSO_MAX_NET_DEVICES) 2438 return -1; 2439 return 0; 2440 } 2441 2442 static int hso_rfkill_set_block(void *data, bool blocked) 2443 { 2444 struct hso_device *hso_dev = data; 2445 int enabled = !blocked; 2446 int rv; 2447 2448 mutex_lock(&hso_dev->mutex); 2449 if (hso_dev->usb_gone) 2450 rv = 0; 2451 else 2452 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2453 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2454 USB_CTRL_SET_TIMEOUT); 2455 mutex_unlock(&hso_dev->mutex); 2456 return rv; 2457 } 2458 2459 static const struct rfkill_ops hso_rfkill_ops = { 2460 .set_block = hso_rfkill_set_block, 2461 }; 2462 2463 /* Creates and sets up everything for rfkill */ 2464 static void hso_create_rfkill(struct hso_device *hso_dev, 2465 struct usb_interface *interface) 2466 { 2467 struct hso_net *hso_net = dev2net(hso_dev); 2468 struct device *dev = &hso_net->net->dev; 2469 static u32 rfkill_counter; 2470 2471 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2472 rfkill_counter++); 2473 2474 hso_net->rfkill = rfkill_alloc(hso_net->name, 2475 &interface_to_usbdev(interface)->dev, 2476 RFKILL_TYPE_WWAN, 2477 &hso_rfkill_ops, hso_dev); 2478 if (!hso_net->rfkill) { 2479 dev_err(dev, "%s - Out of memory\n", __func__); 2480 return; 2481 } 2482 if (rfkill_register(hso_net->rfkill) < 0) { 2483 rfkill_destroy(hso_net->rfkill); 2484 hso_net->rfkill = NULL; 2485 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2486 return; 2487 } 2488 } 2489 2490 static struct device_type hso_type = { 2491 .name = "wwan", 2492 }; 2493 2494 /* Creates our network device */ 2495 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2496 int port_spec) 2497 { 2498 int result, i; 2499 struct net_device *net; 2500 struct hso_net *hso_net; 2501 struct hso_device *hso_dev; 2502 2503 hso_dev = hso_create_device(interface, port_spec); 2504 if (!hso_dev) 2505 return NULL; 2506 2507 /* allocate our network device, then we can put in our private data */ 2508 /* call hso_net_init to do the basic initialization */ 2509 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2510 hso_net_init); 2511 if (!net) { 2512 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2513 goto exit; 2514 } 2515 2516 hso_net = netdev_priv(net); 2517 2518 hso_dev->port_data.dev_net = hso_net; 2519 hso_net->net = net; 2520 hso_net->parent = hso_dev; 2521 2522 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2523 USB_DIR_IN); 2524 if (!hso_net->in_endp) { 2525 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2526 goto exit; 2527 } 2528 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2529 USB_DIR_OUT); 2530 if (!hso_net->out_endp) { 2531 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2532 goto exit; 2533 } 2534 SET_NETDEV_DEV(net, &interface->dev); 2535 SET_NETDEV_DEVTYPE(net, &hso_type); 2536 2537 /* registering our net device */ 2538 result = register_netdev(net); 2539 if (result) { 2540 dev_err(&interface->dev, "Failed to register device\n"); 2541 goto exit; 2542 } 2543 2544 /* start allocating */ 2545 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2546 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2547 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2548 goto exit; 2549 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2550 GFP_KERNEL); 2551 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2552 goto exit; 2553 } 2554 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2555 if (!hso_net->mux_bulk_tx_urb) 2556 goto exit; 2557 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2558 if (!hso_net->mux_bulk_tx_buf) 2559 goto exit; 2560 2561 add_net_device(hso_dev); 2562 2563 hso_log_port(hso_dev); 2564 2565 hso_create_rfkill(hso_dev, interface); 2566 2567 return hso_dev; 2568 exit: 2569 hso_free_net_device(hso_dev); 2570 return NULL; 2571 } 2572 2573 static void hso_free_tiomget(struct hso_serial *serial) 2574 { 2575 struct hso_tiocmget *tiocmget; 2576 if (!serial) 2577 return; 2578 tiocmget = serial->tiocmget; 2579 if (tiocmget) { 2580 usb_free_urb(tiocmget->urb); 2581 tiocmget->urb = NULL; 2582 serial->tiocmget = NULL; 2583 kfree(tiocmget); 2584 } 2585 } 2586 2587 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2588 static void hso_free_serial_device(struct hso_device *hso_dev) 2589 { 2590 struct hso_serial *serial = dev2ser(hso_dev); 2591 2592 if (!serial) 2593 return; 2594 2595 hso_serial_common_free(serial); 2596 2597 if (serial->shared_int) { 2598 mutex_lock(&serial->shared_int->shared_int_lock); 2599 if (--serial->shared_int->ref_count == 0) 2600 hso_free_shared_int(serial->shared_int); 2601 else 2602 mutex_unlock(&serial->shared_int->shared_int_lock); 2603 } 2604 hso_free_tiomget(serial); 2605 kfree(serial); 2606 kfree(hso_dev); 2607 } 2608 2609 /* Creates a bulk AT channel */ 2610 static struct hso_device *hso_create_bulk_serial_device( 2611 struct usb_interface *interface, int port) 2612 { 2613 struct hso_device *hso_dev; 2614 struct hso_serial *serial; 2615 int num_urbs; 2616 struct hso_tiocmget *tiocmget; 2617 2618 hso_dev = hso_create_device(interface, port); 2619 if (!hso_dev) 2620 return NULL; 2621 2622 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2623 if (!serial) 2624 goto exit; 2625 2626 serial->parent = hso_dev; 2627 hso_dev->port_data.dev_serial = serial; 2628 2629 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2630 num_urbs = 2; 2631 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2632 GFP_KERNEL); 2633 /* it isn't going to break our heart if serial->tiocmget 2634 * allocation fails don't bother checking this. 2635 */ 2636 if (serial->tiocmget) { 2637 tiocmget = serial->tiocmget; 2638 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2639 if (tiocmget->urb) { 2640 mutex_init(&tiocmget->mutex); 2641 init_waitqueue_head(&tiocmget->waitq); 2642 tiocmget->endp = hso_get_ep( 2643 interface, 2644 USB_ENDPOINT_XFER_INT, 2645 USB_DIR_IN); 2646 } else 2647 hso_free_tiomget(serial); 2648 } 2649 } 2650 else 2651 num_urbs = 1; 2652 2653 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2654 BULK_URB_TX_SIZE)) 2655 goto exit; 2656 2657 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2658 USB_DIR_IN); 2659 if (!serial->in_endp) { 2660 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2661 goto exit2; 2662 } 2663 2664 if (! 2665 (serial->out_endp = 2666 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2667 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2668 goto exit2; 2669 } 2670 2671 serial->write_data = hso_std_serial_write_data; 2672 2673 /* and record this serial */ 2674 set_serial_by_index(serial->minor, serial); 2675 2676 /* setup the proc dirs and files if needed */ 2677 hso_log_port(hso_dev); 2678 2679 /* done, return it */ 2680 return hso_dev; 2681 2682 exit2: 2683 hso_serial_tty_unregister(serial); 2684 hso_serial_common_free(serial); 2685 exit: 2686 hso_free_tiomget(serial); 2687 kfree(serial); 2688 kfree(hso_dev); 2689 return NULL; 2690 } 2691 2692 /* Creates a multiplexed AT channel */ 2693 static 2694 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2695 int port, 2696 struct hso_shared_int *mux) 2697 { 2698 struct hso_device *hso_dev; 2699 struct hso_serial *serial; 2700 int port_spec; 2701 2702 port_spec = HSO_INTF_MUX; 2703 port_spec &= ~HSO_PORT_MASK; 2704 2705 port_spec |= hso_mux_to_port(port); 2706 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2707 return NULL; 2708 2709 hso_dev = hso_create_device(interface, port_spec); 2710 if (!hso_dev) 2711 return NULL; 2712 2713 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2714 if (!serial) 2715 goto exit; 2716 2717 hso_dev->port_data.dev_serial = serial; 2718 serial->parent = hso_dev; 2719 2720 if (hso_serial_common_create 2721 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2722 goto exit; 2723 2724 serial->tx_data_length--; 2725 serial->write_data = hso_mux_serial_write_data; 2726 2727 serial->shared_int = mux; 2728 mutex_lock(&serial->shared_int->shared_int_lock); 2729 serial->shared_int->ref_count++; 2730 mutex_unlock(&serial->shared_int->shared_int_lock); 2731 2732 /* and record this serial */ 2733 set_serial_by_index(serial->minor, serial); 2734 2735 /* setup the proc dirs and files if needed */ 2736 hso_log_port(hso_dev); 2737 2738 /* done, return it */ 2739 return hso_dev; 2740 2741 exit: 2742 if (serial) { 2743 tty_unregister_device(tty_drv, serial->minor); 2744 kfree(serial); 2745 } 2746 kfree(hso_dev); 2747 return NULL; 2748 2749 } 2750 2751 static void hso_free_shared_int(struct hso_shared_int *mux) 2752 { 2753 usb_free_urb(mux->shared_intr_urb); 2754 kfree(mux->shared_intr_buf); 2755 mutex_unlock(&mux->shared_int_lock); 2756 kfree(mux); 2757 } 2758 2759 static 2760 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2761 { 2762 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2763 2764 if (!mux) 2765 return NULL; 2766 2767 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2768 USB_DIR_IN); 2769 if (!mux->intr_endp) { 2770 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2771 goto exit; 2772 } 2773 2774 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2775 if (!mux->shared_intr_urb) 2776 goto exit; 2777 mux->shared_intr_buf = 2778 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2779 GFP_KERNEL); 2780 if (!mux->shared_intr_buf) 2781 goto exit; 2782 2783 mutex_init(&mux->shared_int_lock); 2784 2785 return mux; 2786 2787 exit: 2788 kfree(mux->shared_intr_buf); 2789 usb_free_urb(mux->shared_intr_urb); 2790 kfree(mux); 2791 return NULL; 2792 } 2793 2794 /* Gets the port spec for a certain interface */ 2795 static int hso_get_config_data(struct usb_interface *interface) 2796 { 2797 struct usb_device *usbdev = interface_to_usbdev(interface); 2798 u8 *config_data = kmalloc(17, GFP_KERNEL); 2799 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2800 s32 result; 2801 2802 if (!config_data) 2803 return -ENOMEM; 2804 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2805 0x86, 0xC0, 0, 0, config_data, 17, 2806 USB_CTRL_SET_TIMEOUT) != 0x11) { 2807 kfree(config_data); 2808 return -EIO; 2809 } 2810 2811 switch (config_data[if_num]) { 2812 case 0x0: 2813 result = 0; 2814 break; 2815 case 0x1: 2816 result = HSO_PORT_DIAG; 2817 break; 2818 case 0x2: 2819 result = HSO_PORT_GPS; 2820 break; 2821 case 0x3: 2822 result = HSO_PORT_GPS_CONTROL; 2823 break; 2824 case 0x4: 2825 result = HSO_PORT_APP; 2826 break; 2827 case 0x5: 2828 result = HSO_PORT_APP2; 2829 break; 2830 case 0x6: 2831 result = HSO_PORT_CONTROL; 2832 break; 2833 case 0x7: 2834 result = HSO_PORT_NETWORK; 2835 break; 2836 case 0x8: 2837 result = HSO_PORT_MODEM; 2838 break; 2839 case 0x9: 2840 result = HSO_PORT_MSD; 2841 break; 2842 case 0xa: 2843 result = HSO_PORT_PCSC; 2844 break; 2845 case 0xb: 2846 result = HSO_PORT_VOICE; 2847 break; 2848 default: 2849 result = 0; 2850 } 2851 2852 if (result) 2853 result |= HSO_INTF_BULK; 2854 2855 if (config_data[16] & 0x1) 2856 result |= HSO_INFO_CRC_BUG; 2857 2858 kfree(config_data); 2859 return result; 2860 } 2861 2862 /* called once for each interface upon device insertion */ 2863 static int hso_probe(struct usb_interface *interface, 2864 const struct usb_device_id *id) 2865 { 2866 int mux, i, if_num, port_spec; 2867 unsigned char port_mask; 2868 struct hso_device *hso_dev = NULL; 2869 struct hso_shared_int *shared_int; 2870 struct hso_device *tmp_dev = NULL; 2871 2872 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2873 dev_err(&interface->dev, "Not our interface\n"); 2874 return -ENODEV; 2875 } 2876 2877 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2878 2879 /* Get the interface/port specification from either driver_info or from 2880 * the device itself */ 2881 if (id->driver_info) 2882 port_spec = ((u32 *)(id->driver_info))[if_num]; 2883 else 2884 port_spec = hso_get_config_data(interface); 2885 2886 /* Check if we need to switch to alt interfaces prior to port 2887 * configuration */ 2888 if (interface->num_altsetting > 1) 2889 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2890 interface->needs_remote_wakeup = 1; 2891 2892 /* Allocate new hso device(s) */ 2893 switch (port_spec & HSO_INTF_MASK) { 2894 case HSO_INTF_MUX: 2895 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2896 /* Create the network device */ 2897 if (!disable_net) { 2898 hso_dev = hso_create_net_device(interface, 2899 port_spec); 2900 if (!hso_dev) 2901 goto exit; 2902 tmp_dev = hso_dev; 2903 } 2904 } 2905 2906 if (hso_get_mux_ports(interface, &port_mask)) 2907 /* TODO: de-allocate everything */ 2908 goto exit; 2909 2910 shared_int = hso_create_shared_int(interface); 2911 if (!shared_int) 2912 goto exit; 2913 2914 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2915 if (port_mask & i) { 2916 hso_dev = hso_create_mux_serial_device( 2917 interface, i, shared_int); 2918 if (!hso_dev) 2919 goto exit; 2920 } 2921 } 2922 2923 if (tmp_dev) 2924 hso_dev = tmp_dev; 2925 break; 2926 2927 case HSO_INTF_BULK: 2928 /* It's a regular bulk interface */ 2929 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2930 if (!disable_net) 2931 hso_dev = 2932 hso_create_net_device(interface, port_spec); 2933 } else { 2934 hso_dev = 2935 hso_create_bulk_serial_device(interface, port_spec); 2936 } 2937 if (!hso_dev) 2938 goto exit; 2939 break; 2940 default: 2941 goto exit; 2942 } 2943 2944 /* save our data pointer in this device */ 2945 usb_set_intfdata(interface, hso_dev); 2946 2947 /* done */ 2948 return 0; 2949 exit: 2950 hso_free_interface(interface); 2951 return -ENODEV; 2952 } 2953 2954 /* device removed, cleaning up */ 2955 static void hso_disconnect(struct usb_interface *interface) 2956 { 2957 hso_free_interface(interface); 2958 2959 /* remove reference of our private data */ 2960 usb_set_intfdata(interface, NULL); 2961 } 2962 2963 static void async_get_intf(struct work_struct *data) 2964 { 2965 struct hso_device *hso_dev = 2966 container_of(data, struct hso_device, async_get_intf); 2967 usb_autopm_get_interface(hso_dev->interface); 2968 } 2969 2970 static void async_put_intf(struct work_struct *data) 2971 { 2972 struct hso_device *hso_dev = 2973 container_of(data, struct hso_device, async_put_intf); 2974 usb_autopm_put_interface(hso_dev->interface); 2975 } 2976 2977 static int hso_get_activity(struct hso_device *hso_dev) 2978 { 2979 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2980 if (!hso_dev->is_active) { 2981 hso_dev->is_active = 1; 2982 schedule_work(&hso_dev->async_get_intf); 2983 } 2984 } 2985 2986 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2987 return -EAGAIN; 2988 2989 usb_mark_last_busy(hso_dev->usb); 2990 2991 return 0; 2992 } 2993 2994 static int hso_put_activity(struct hso_device *hso_dev) 2995 { 2996 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2997 if (hso_dev->is_active) { 2998 hso_dev->is_active = 0; 2999 schedule_work(&hso_dev->async_put_intf); 3000 return -EAGAIN; 3001 } 3002 } 3003 hso_dev->is_active = 0; 3004 return 0; 3005 } 3006 3007 /* called by kernel when we need to suspend device */ 3008 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3009 { 3010 int i, result; 3011 3012 /* Stop all serial ports */ 3013 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3014 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3015 result = hso_stop_serial_device(serial_table[i]); 3016 if (result) 3017 goto out; 3018 } 3019 } 3020 3021 /* Stop all network ports */ 3022 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3023 if (network_table[i] && 3024 (network_table[i]->interface == iface)) { 3025 result = hso_stop_net_device(network_table[i]); 3026 if (result) 3027 goto out; 3028 } 3029 } 3030 3031 out: 3032 return 0; 3033 } 3034 3035 /* called by kernel when we need to resume device */ 3036 static int hso_resume(struct usb_interface *iface) 3037 { 3038 int i, result = 0; 3039 struct hso_net *hso_net; 3040 3041 /* Start all serial ports */ 3042 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3043 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3044 if (dev2ser(serial_table[i])->port.count) { 3045 result = 3046 hso_start_serial_device(serial_table[i], GFP_NOIO); 3047 hso_kick_transmit(dev2ser(serial_table[i])); 3048 if (result) 3049 goto out; 3050 } 3051 } 3052 } 3053 3054 /* Start all network ports */ 3055 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3056 if (network_table[i] && 3057 (network_table[i]->interface == iface)) { 3058 hso_net = dev2net(network_table[i]); 3059 if (hso_net->flags & IFF_UP) { 3060 /* First transmit any lingering data, 3061 then restart the device. */ 3062 if (hso_net->skb_tx_buf) { 3063 dev_dbg(&iface->dev, 3064 "Transmitting" 3065 " lingering data\n"); 3066 hso_net_start_xmit(hso_net->skb_tx_buf, 3067 hso_net->net); 3068 hso_net->skb_tx_buf = NULL; 3069 } 3070 result = hso_start_net_device(network_table[i]); 3071 if (result) 3072 goto out; 3073 } 3074 } 3075 } 3076 3077 out: 3078 return result; 3079 } 3080 3081 static void hso_serial_ref_free(struct kref *ref) 3082 { 3083 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3084 3085 hso_free_serial_device(hso_dev); 3086 } 3087 3088 static void hso_free_interface(struct usb_interface *interface) 3089 { 3090 struct hso_serial *serial; 3091 int i; 3092 3093 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3094 if (serial_table[i] && 3095 (serial_table[i]->interface == interface)) { 3096 serial = dev2ser(serial_table[i]); 3097 tty_port_tty_hangup(&serial->port, false); 3098 mutex_lock(&serial->parent->mutex); 3099 serial->parent->usb_gone = 1; 3100 mutex_unlock(&serial->parent->mutex); 3101 cancel_work_sync(&serial_table[i]->async_put_intf); 3102 cancel_work_sync(&serial_table[i]->async_get_intf); 3103 hso_serial_tty_unregister(serial); 3104 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3105 set_serial_by_index(i, NULL); 3106 } 3107 } 3108 3109 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3110 if (network_table[i] && 3111 (network_table[i]->interface == interface)) { 3112 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3113 /* hso_stop_net_device doesn't stop the net queue since 3114 * traffic needs to start it again when suspended */ 3115 netif_stop_queue(dev2net(network_table[i])->net); 3116 hso_stop_net_device(network_table[i]); 3117 cancel_work_sync(&network_table[i]->async_put_intf); 3118 cancel_work_sync(&network_table[i]->async_get_intf); 3119 if (rfk) { 3120 rfkill_unregister(rfk); 3121 rfkill_destroy(rfk); 3122 } 3123 hso_free_net_device(network_table[i]); 3124 } 3125 } 3126 } 3127 3128 /* Helper functions */ 3129 3130 /* Get the endpoint ! */ 3131 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3132 int type, int dir) 3133 { 3134 int i; 3135 struct usb_host_interface *iface = intf->cur_altsetting; 3136 struct usb_endpoint_descriptor *endp; 3137 3138 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3139 endp = &iface->endpoint[i].desc; 3140 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3141 (usb_endpoint_type(endp) == type)) 3142 return endp; 3143 } 3144 3145 return NULL; 3146 } 3147 3148 /* Get the byte that describes which ports are enabled */ 3149 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3150 { 3151 int i; 3152 struct usb_host_interface *iface = intf->cur_altsetting; 3153 3154 if (iface->extralen == 3) { 3155 *ports = iface->extra[2]; 3156 return 0; 3157 } 3158 3159 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3160 if (iface->endpoint[i].extralen == 3) { 3161 *ports = iface->endpoint[i].extra[2]; 3162 return 0; 3163 } 3164 } 3165 3166 return -1; 3167 } 3168 3169 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3170 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3171 struct usb_device *usb, gfp_t gfp) 3172 { 3173 int result; 3174 3175 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3176 usb_rcvintpipe(usb, 3177 shared_int->intr_endp->bEndpointAddress & 0x7F), 3178 shared_int->shared_intr_buf, 3179 1, 3180 intr_callback, shared_int, 3181 shared_int->intr_endp->bInterval); 3182 3183 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3184 if (result) 3185 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3186 result); 3187 3188 return result; 3189 } 3190 3191 /* operations setup of the serial interface */ 3192 static const struct tty_operations hso_serial_ops = { 3193 .open = hso_serial_open, 3194 .close = hso_serial_close, 3195 .write = hso_serial_write, 3196 .write_room = hso_serial_write_room, 3197 .cleanup = hso_serial_cleanup, 3198 .ioctl = hso_serial_ioctl, 3199 .set_termios = hso_serial_set_termios, 3200 .chars_in_buffer = hso_serial_chars_in_buffer, 3201 .tiocmget = hso_serial_tiocmget, 3202 .tiocmset = hso_serial_tiocmset, 3203 .get_icount = hso_get_count, 3204 .unthrottle = hso_unthrottle 3205 }; 3206 3207 static struct usb_driver hso_driver = { 3208 .name = driver_name, 3209 .probe = hso_probe, 3210 .disconnect = hso_disconnect, 3211 .id_table = hso_ids, 3212 .suspend = hso_suspend, 3213 .resume = hso_resume, 3214 .reset_resume = hso_resume, 3215 .supports_autosuspend = 1, 3216 .disable_hub_initiated_lpm = 1, 3217 }; 3218 3219 static int __init hso_init(void) 3220 { 3221 int i; 3222 int result; 3223 3224 /* put it in the log */ 3225 pr_info("%s\n", version); 3226 3227 /* Initialise the serial table semaphore and table */ 3228 spin_lock_init(&serial_table_lock); 3229 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3230 serial_table[i] = NULL; 3231 3232 /* allocate our driver using the proper amount of supported minors */ 3233 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3234 if (!tty_drv) 3235 return -ENOMEM; 3236 3237 /* fill in all needed values */ 3238 tty_drv->driver_name = driver_name; 3239 tty_drv->name = tty_filename; 3240 3241 /* if major number is provided as parameter, use that one */ 3242 if (tty_major) 3243 tty_drv->major = tty_major; 3244 3245 tty_drv->minor_start = 0; 3246 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3247 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3248 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3249 tty_drv->init_termios = tty_std_termios; 3250 hso_init_termios(&tty_drv->init_termios); 3251 tty_set_operations(tty_drv, &hso_serial_ops); 3252 3253 /* register the tty driver */ 3254 result = tty_register_driver(tty_drv); 3255 if (result) { 3256 pr_err("%s - tty_register_driver failed(%d)\n", 3257 __func__, result); 3258 goto err_free_tty; 3259 } 3260 3261 /* register this module as an usb driver */ 3262 result = usb_register(&hso_driver); 3263 if (result) { 3264 pr_err("Could not register hso driver - error: %d\n", result); 3265 goto err_unreg_tty; 3266 } 3267 3268 /* done */ 3269 return 0; 3270 err_unreg_tty: 3271 tty_unregister_driver(tty_drv); 3272 err_free_tty: 3273 put_tty_driver(tty_drv); 3274 return result; 3275 } 3276 3277 static void __exit hso_exit(void) 3278 { 3279 pr_info("unloaded\n"); 3280 3281 tty_unregister_driver(tty_drv); 3282 put_tty_driver(tty_drv); 3283 /* deregister the usb driver */ 3284 usb_deregister(&hso_driver); 3285 } 3286 3287 /* Module definitions */ 3288 module_init(hso_init); 3289 module_exit(hso_exit); 3290 3291 MODULE_AUTHOR(MOD_AUTHOR); 3292 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3293 MODULE_LICENSE(MOD_LICENSE); 3294 3295 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3296 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3297 module_param(debug, int, S_IRUGO | S_IWUSR); 3298 3299 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3300 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3301 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3302 3303 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3304 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3305 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3306