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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 | /* * USB HandSpring Visor driver * * Copyright (C) 1999, 2000 * Greg Kroah-Hartman (greg@kroah.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * See Documentation/usb/usb-serial.txt for more information on using this driver * * (09/11/2000) gkh * Got rid of always calling kmalloc for every urb we wrote out to the * device. * Added visor_read_callback so we can keep track of bytes in and out for * those people who like to know the speed of their device. * Removed DEBUG #ifdefs with call to usb_serial_debug_data * * (09/06/2000) gkh * Fixed oops in visor_exit. Need to uncomment usb_unlink_urb call _after_ * the host controller drivers set urb->dev = NULL when the urb is finished. * * (08/28/2000) gkh * Added locks for SMP safeness. * * (08/08/2000) gkh * Fixed endian problem in visor_startup. * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more * than once. * * (07/23/2000) gkh * Added pool of write urbs to speed up transfers to the visor. * * (07/19/2000) gkh * Added module_init and module_exit functions to handle the fact that this * driver is a loadable module now. * * (07/03/2000) gkh * Added visor_set_ioctl and visor_set_termios functions (they don't do much * of anything, but are good for debugging.) * * (06/25/2000) gkh * Fixed bug in visor_unthrottle that should help with the disconnect in PPP * bug that people have been reporting. * * (06/23/2000) gkh * Cleaned up debugging statements in a quest to find UHCI timeout bug. * * (04/27/2000) Ryan VanderBijl * Fixed memory leak in visor_close * * (03/26/2000) gkh * Split driver up into device specific pieces. * */ #include <linux/config.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/signal.h> #include <linux/errno.h> #include <linux/poll.h> #include <linux/init.h> #include <linux/malloc.h> #include <linux/fcntl.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/tty.h> #include <linux/module.h> #include <linux/spinlock.h> #ifdef CONFIG_USB_SERIAL_DEBUG #define DEBUG #else #undef DEBUG #endif #include <linux/usb.h> #include "usb-serial.h" #include "visor.h" #define MIN(a,b) (((a)<(b))?(a):(b)) /* function prototypes for a handspring visor */ static int visor_open (struct usb_serial_port *port, struct file *filp); static void visor_close (struct usb_serial_port *port, struct file *filp); static int visor_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count); static void visor_throttle (struct usb_serial_port *port); static void visor_unthrottle (struct usb_serial_port *port); static int visor_startup (struct usb_serial *serial); static void visor_shutdown (struct usb_serial *serial); static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios); static void visor_write_bulk_callback (struct urb *urb); static void visor_read_bulk_callback (struct urb *urb); /* All of the device info needed for the Handspring Visor */ static __u16 handspring_vendor_id = HANDSPRING_VENDOR_ID; static __u16 handspring_product_id = HANDSPRING_VISOR_ID; struct usb_serial_device_type handspring_device = { name: "Handspring Visor", idVendor: &handspring_vendor_id, /* the Handspring vendor ID */ idProduct: &handspring_product_id, /* the Handspring Visor product id */ needs_interrupt_in: MUST_HAVE_NOT, /* this device must not have an interrupt in endpoint */ needs_bulk_in: MUST_HAVE, /* this device must have a bulk in endpoint */ needs_bulk_out: MUST_HAVE, /* this device must have a bulk out endpoint */ num_interrupt_in: 0, num_bulk_in: 2, num_bulk_out: 2, num_ports: 2, open: visor_open, close: visor_close, throttle: visor_throttle, unthrottle: visor_unthrottle, startup: visor_startup, shutdown: visor_shutdown, ioctl: visor_ioctl, set_termios: visor_set_termios, write: visor_write, write_bulk_callback: visor_write_bulk_callback, read_bulk_callback: visor_read_bulk_callback, }; #define NUM_URBS 24 #define URB_TRANSFER_BUFFER_SIZE 64 static struct urb *write_urb_pool[NUM_URBS]; static spinlock_t write_urb_pool_lock; static int bytes_in; static int bytes_out; /****************************************************************************** * Handspring Visor specific driver functions ******************************************************************************/ static int visor_open (struct usb_serial_port *port, struct file *filp) { unsigned long flags; if (port_paranoia_check (port, __FUNCTION__)) return -ENODEV; dbg(__FUNCTION__ " - port %d", port->number); spin_lock_irqsave (&port->port_lock, flags); ++port->open_count; MOD_INC_USE_COUNT; if (!port->active) { port->active = 1; bytes_in = 0; bytes_out = 0; /*Start reading from the device*/ if (usb_submit_urb(port->read_urb)) dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed"); } spin_unlock_irqrestore (&port->port_lock, flags); return 0; } static void visor_close (struct usb_serial_port *port, struct file * filp) { struct usb_serial *serial; unsigned char *transfer_buffer; unsigned long flags; if (port_paranoia_check (port, __FUNCTION__)) return; dbg(__FUNCTION__ " - port %d", port->number); serial = get_usb_serial (port, __FUNCTION__); if (!serial) return; spin_lock_irqsave (&port->port_lock, flags); --port->open_count; MOD_DEC_USE_COUNT; if (port->open_count <= 0) { transfer_buffer = kmalloc (0x12, GFP_KERNEL); if (!transfer_buffer) { err(__FUNCTION__ " - kmalloc(%d) failed.", 0x12); } else { /* send a shutdown message to the device */ usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_CLOSE_NOTIFICATION, 0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300); kfree (transfer_buffer); } /* shutdown our bulk read */ usb_unlink_urb (port->read_urb); port->active = 0; port->open_count = 0; } spin_unlock_irqrestore (&port->port_lock, flags); /* Uncomment the following line if you want to see some statistics in your syslog */ /* info ("Bytes In = %d Bytes Out = %d", bytes_in, bytes_out); */ } static int visor_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count) { struct usb_serial *serial = port->serial; struct urb *urb; const unsigned char *current_position = buf; unsigned long flags; int status; int i; int bytes_sent = 0; int transfer_size; dbg(__FUNCTION__ " - port %d", port->number); usb_serial_debug_data (__FILE__, __FUNCTION__, count, buf); while (count > 0) { /* try to find a free urb in our list of them */ urb = NULL; spin_lock_irqsave (&write_urb_pool_lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (write_urb_pool[i]->status != -EINPROGRESS) { urb = write_urb_pool[i]; break; } } spin_unlock_irqrestore (&write_urb_pool_lock, flags); if (urb == NULL) { dbg (__FUNCTION__ " - no more free urbs"); goto exit; } if (urb->transfer_buffer == NULL) { urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (urb->transfer_buffer == NULL) { err(__FUNCTION__" no more kernel memory..."); goto exit; } } transfer_size = MIN (count, URB_TRANSFER_BUFFER_SIZE); if (from_user) copy_from_user (urb->transfer_buffer, current_position, transfer_size); else memcpy (urb->transfer_buffer, current_position, transfer_size); count = (count > port->bulk_out_size) ? port->bulk_out_size : count; /* build up our urb */ FILL_BULK_URB (urb, serial->dev, usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress), urb->transfer_buffer, transfer_size, visor_write_bulk_callback, port); urb->transfer_flags |= USB_QUEUE_BULK; /* send it down the pipe */ status = usb_submit_urb(urb); if (status) dbg(__FUNCTION__ " - usb_submit_urb(write bulk) failed with status = %d", status); current_position += transfer_size; bytes_sent += transfer_size; count -= transfer_size; bytes_out += transfer_size; } exit: return bytes_sent; } static void visor_write_bulk_callback (struct urb *urb) { struct usb_serial_port *port = (struct usb_serial_port *)urb->context; if (port_paranoia_check (port, __FUNCTION__)) return; dbg(__FUNCTION__ " - port %d", port->number); if (urb->status) { dbg(__FUNCTION__ " - nonzero write bulk status received: %d", urb->status); return; } queue_task(&port->tqueue, &tq_immediate); mark_bh(IMMEDIATE_BH); return; } static void visor_read_bulk_callback (struct urb *urb) { struct usb_serial_port *port = (struct usb_serial_port *)urb->context; struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int i; if (port_paranoia_check (port, __FUNCTION__)) return; dbg(__FUNCTION__ " - port %d", port->number); if (urb->status) { dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status); return; } usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data); tty = port->tty; if (urb->actual_length) { for (i = 0; i < urb->actual_length ; ++i) { tty_insert_flip_char(tty, data[i], 0); } tty_flip_buffer_push(tty); bytes_in += urb->actual_length; } /* Continue trying to always read */ if (usb_submit_urb(urb)) dbg(__FUNCTION__ " - failed resubmitting read urb"); return; } static void visor_throttle (struct usb_serial_port *port) { unsigned long flags; dbg(__FUNCTION__ " - port %d", port->number); spin_lock_irqsave (&port->port_lock, flags); usb_unlink_urb (port->read_urb); spin_unlock_irqrestore (&port->port_lock, flags); return; } static void visor_unthrottle (struct usb_serial_port *port) { unsigned long flags; dbg(__FUNCTION__ " - port %d", port->number); spin_lock_irqsave (&port->port_lock, flags); if (usb_submit_urb (port->read_urb)) dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed"); spin_unlock_irqrestore (&port->port_lock, flags); return; } static int visor_startup (struct usb_serial *serial) { int response; int i; unsigned char *transfer_buffer = kmalloc (256, GFP_KERNEL); if (!transfer_buffer) { err(__FUNCTION__ " - kmalloc(%d) failed.", 256); return -ENOMEM; } dbg(__FUNCTION__); dbg(__FUNCTION__ " - Set config to 1"); usb_set_configuration (serial->dev, 1); /* send a get connection info request */ response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_GET_CONNECTION_INFORMATION, 0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300); if (response < 0) { err(__FUNCTION__ " - error getting connection information"); } else { struct visor_connection_info *connection_info = (struct visor_connection_info *)transfer_buffer; char *string; le16_to_cpus(&connection_info->num_ports); info("%s: Number of ports: %d", serial->type->name, connection_info->num_ports); for (i = 0; i < connection_info->num_ports; ++i) { switch (connection_info->connections[i].port_function_id) { case VISOR_FUNCTION_GENERIC: string = "Generic"; break; case VISOR_FUNCTION_DEBUGGER: string = "Debugger"; break; case VISOR_FUNCTION_HOTSYNC: string = "HotSync"; break; case VISOR_FUNCTION_CONSOLE: string = "Console"; break; case VISOR_FUNCTION_REMOTE_FILE_SYS: string = "Remote File System"; break; default: string = "unknown"; break; } info("%s: port %d, is for %s use and is bound to ttyUSB%d", serial->type->name, connection_info->connections[i].port, string, serial->minor + i); } } /* ask for the number of bytes available, but ignore the response as it is broken */ response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_REQUEST_BYTES_AVAILABLE, 0xc2, 0x0000, 0x0005, transfer_buffer, 0x02, 300); if (response < 0) { err(__FUNCTION__ " - error getting bytes available request"); } kfree (transfer_buffer); /* continue on with initialization */ return 0; } static void visor_shutdown (struct usb_serial *serial) { int i; dbg (__FUNCTION__); /* stop reads and writes on all ports */ for (i=0; i < serial->num_ports; ++i) { while (serial->port[i].open_count > 0) { visor_close (&serial->port[i], NULL); } } } static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) { dbg(__FUNCTION__ " - port %d, cmd 0x%.4x", port->number, cmd); return -ENOIOCTLCMD; } /* This function is all nice and good, but we don't change anything based on it :) */ static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios) { unsigned int cflag = port->tty->termios->c_cflag; dbg(__FUNCTION__ " - port %d", port->number); /* check that they really want us to change something */ if (old_termios) { if ((cflag == old_termios->c_cflag) && (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { dbg(__FUNCTION__ " - nothing to change..."); return; } } if ((!port->tty) || (!port->tty->termios)) { dbg(__FUNCTION__" - no tty structures"); return; } /* get the byte size */ switch (cflag & CSIZE) { case CS5: dbg(__FUNCTION__ " - data bits = 5"); break; case CS6: dbg(__FUNCTION__ " - data bits = 6"); break; case CS7: dbg(__FUNCTION__ " - data bits = 7"); break; default: case CS8: dbg(__FUNCTION__ " - data bits = 8"); break; } /* determine the parity */ if (cflag & PARENB) if (cflag & PARODD) dbg(__FUNCTION__ " - parity = odd"); else dbg(__FUNCTION__ " - parity = even"); else dbg(__FUNCTION__ " - parity = none"); /* figure out the stop bits requested */ if (cflag & CSTOPB) dbg(__FUNCTION__ " - stop bits = 2"); else dbg(__FUNCTION__ " - stop bits = 1"); /* figure out the flow control settings */ if (cflag & CRTSCTS) dbg(__FUNCTION__ " - RTS/CTS is enabled"); else dbg(__FUNCTION__ " - RTS/CTS is disabled"); /* determine software flow control */ if (I_IXOFF(port->tty)) dbg(__FUNCTION__ " - XON/XOFF is enabled, XON = %2x, XOFF = %2x", START_CHAR(port->tty), STOP_CHAR(port->tty)); else dbg(__FUNCTION__ " - XON/XOFF is disabled"); /* get the baud rate wanted */ dbg(__FUNCTION__ " - baud rate = %d", tty_get_baud_rate(port->tty)); return; } static int __init visor_init (void) { struct urb *urb; int i; usb_serial_register (&handspring_device); /* create our write urb pool and transfer buffers */ spin_lock_init (&write_urb_pool_lock); for (i = 0; i < NUM_URBS; ++i) { urb = usb_alloc_urb(0); write_urb_pool[i] = urb; if (urb == NULL) { err("No more urbs???"); continue; } urb->transfer_buffer = NULL; urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (!urb->transfer_buffer) { err (__FUNCTION__ " - out of memory for urb buffers."); continue; } } return 0; } static void __exit visor_exit (void) { int i; unsigned long flags; usb_serial_deregister (&handspring_device); spin_lock_irqsave (&write_urb_pool_lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (write_urb_pool[i]) { /* FIXME - uncomment the following usb_unlink_urb call when * the host controllers get fixed to set urb->dev = NULL after * the urb is finished. Otherwise this call oopses. */ /* usb_unlink_urb(write_urb_pool[i]); */ if (write_urb_pool[i]->transfer_buffer) kfree(write_urb_pool[i]->transfer_buffer); usb_free_urb (write_urb_pool[i]); } } spin_unlock_irqrestore (&write_urb_pool_lock, flags); } module_init(visor_init); module_exit(visor_exit); MODULE_AUTHOR("Greg Kroah-Hartman <greg@kroah.com>"); MODULE_DESCRIPTION("USB HandSpring Visor driver"); |