1 /* 2 * REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver 3 * 4 * Copyright (C) 2001 REINER SCT 5 * Author: Matthias Bruestle 6 * 7 * Contact: support@reiner-sct.com (see MAINTAINERS) 8 * 9 * This program is largely derived from work by the linux-usb group 10 * and associated source files. Please see the usb/serial files for 11 * individual credits and copyrights. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and 19 * patience. 20 * 21 * In case of problems, please write to the contact e-mail address 22 * mentioned above. 23 * 24 * Please note that later models of the cyberjack reader family are 25 * supported by a libusb-based userspace device driver. 26 * 27 * Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux 28 */ 29 30 31 #include <linux/kernel.h> 32 #include <linux/errno.h> 33 #include <linux/init.h> 34 #include <linux/slab.h> 35 #include <linux/tty.h> 36 #include <linux/tty_driver.h> 37 #include <linux/tty_flip.h> 38 #include <linux/module.h> 39 #include <linux/spinlock.h> 40 #include <asm/uaccess.h> 41 #include <linux/usb.h> 42 #include <linux/usb/serial.h> 43 44 #define CYBERJACK_LOCAL_BUF_SIZE 32 45 46 static int debug; 47 48 /* 49 * Version Information 50 */ 51 #define DRIVER_VERSION "v1.01" 52 #define DRIVER_AUTHOR "Matthias Bruestle" 53 #define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver" 54 55 56 #define CYBERJACK_VENDOR_ID 0x0C4B 57 #define CYBERJACK_PRODUCT_ID 0x0100 58 59 /* Function prototypes */ 60 static int cyberjack_startup (struct usb_serial *serial); 61 static void cyberjack_shutdown (struct usb_serial *serial); 62 static int cyberjack_open (struct usb_serial_port *port, struct file *filp); 63 static void cyberjack_close (struct usb_serial_port *port, struct file *filp); 64 static int cyberjack_write (struct usb_serial_port *port, const unsigned char *buf, int count); 65 static int cyberjack_write_room( struct usb_serial_port *port ); 66 static void cyberjack_read_int_callback (struct urb *urb); 67 static void cyberjack_read_bulk_callback (struct urb *urb); 68 static void cyberjack_write_bulk_callback (struct urb *urb); 69 70 static struct usb_device_id id_table [] = { 71 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) }, 72 { } /* Terminating entry */ 73 }; 74 75 MODULE_DEVICE_TABLE (usb, id_table); 76 77 static struct usb_driver cyberjack_driver = { 78 .name = "cyberjack", 79 .probe = usb_serial_probe, 80 .disconnect = usb_serial_disconnect, 81 .id_table = id_table, 82 .no_dynamic_id = 1, 83 }; 84 85 static struct usb_serial_driver cyberjack_device = { 86 .driver = { 87 .owner = THIS_MODULE, 88 .name = "cyberjack", 89 }, 90 .description = "Reiner SCT Cyberjack USB card reader", 91 .usb_driver = &cyberjack_driver, 92 .id_table = id_table, 93 .num_interrupt_in = 1, 94 .num_bulk_in = 1, 95 .num_bulk_out = 1, 96 .num_ports = 1, 97 .attach = cyberjack_startup, 98 .shutdown = cyberjack_shutdown, 99 .open = cyberjack_open, 100 .close = cyberjack_close, 101 .write = cyberjack_write, 102 .write_room = cyberjack_write_room, 103 .read_int_callback = cyberjack_read_int_callback, 104 .read_bulk_callback = cyberjack_read_bulk_callback, 105 .write_bulk_callback = cyberjack_write_bulk_callback, 106 }; 107 108 struct cyberjack_private { 109 spinlock_t lock; /* Lock for SMP */ 110 short rdtodo; /* Bytes still to read */ 111 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */ 112 short wrfilled; /* Overall data size we already got */ 113 short wrsent; /* Data already sent */ 114 }; 115 116 /* do some startup allocations not currently performed by usb_serial_probe() */ 117 static int cyberjack_startup (struct usb_serial *serial) 118 { 119 struct cyberjack_private *priv; 120 int i; 121 122 dbg("%s", __FUNCTION__); 123 124 /* allocate the private data structure */ 125 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL); 126 if (!priv) 127 return -ENOMEM; 128 129 /* set initial values */ 130 spin_lock_init(&priv->lock); 131 priv->rdtodo = 0; 132 priv->wrfilled = 0; 133 priv->wrsent = 0; 134 usb_set_serial_port_data(serial->port[0], priv); 135 136 init_waitqueue_head(&serial->port[0]->write_wait); 137 138 for (i = 0; i < serial->num_ports; ++i) { 139 int result; 140 serial->port[i]->interrupt_in_urb->dev = serial->dev; 141 result = usb_submit_urb(serial->port[i]->interrupt_in_urb, 142 GFP_KERNEL); 143 if (result) 144 err(" usb_submit_urb(read int) failed"); 145 dbg("%s - usb_submit_urb(int urb)", __FUNCTION__); 146 } 147 148 return( 0 ); 149 } 150 151 static void cyberjack_shutdown (struct usb_serial *serial) 152 { 153 int i; 154 155 dbg("%s", __FUNCTION__); 156 157 for (i=0; i < serial->num_ports; ++i) { 158 usb_kill_urb(serial->port[i]->interrupt_in_urb); 159 /* My special items, the standard routines free my urbs */ 160 kfree(usb_get_serial_port_data(serial->port[i])); 161 usb_set_serial_port_data(serial->port[i], NULL); 162 } 163 } 164 165 static int cyberjack_open (struct usb_serial_port *port, struct file *filp) 166 { 167 struct cyberjack_private *priv; 168 unsigned long flags; 169 int result = 0; 170 171 dbg("%s - port %d", __FUNCTION__, port->number); 172 173 dbg("%s - usb_clear_halt", __FUNCTION__ ); 174 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 175 176 /* force low_latency on so that our tty_push actually forces 177 * the data through, otherwise it is scheduled, and with high 178 * data rates (like with OHCI) data can get lost. 179 */ 180 port->tty->low_latency = 1; 181 182 priv = usb_get_serial_port_data(port); 183 spin_lock_irqsave(&priv->lock, flags); 184 priv->rdtodo = 0; 185 priv->wrfilled = 0; 186 priv->wrsent = 0; 187 spin_unlock_irqrestore(&priv->lock, flags); 188 189 return result; 190 } 191 192 static void cyberjack_close (struct usb_serial_port *port, struct file *filp) 193 { 194 dbg("%s - port %d", __FUNCTION__, port->number); 195 196 if (port->serial->dev) { 197 /* shutdown any bulk reads that might be going on */ 198 usb_kill_urb(port->write_urb); 199 usb_kill_urb(port->read_urb); 200 } 201 } 202 203 static int cyberjack_write (struct usb_serial_port *port, const unsigned char *buf, int count) 204 { 205 struct usb_serial *serial = port->serial; 206 struct cyberjack_private *priv = usb_get_serial_port_data(port); 207 unsigned long flags; 208 int result; 209 int wrexpected; 210 211 dbg("%s - port %d", __FUNCTION__, port->number); 212 213 if (count == 0) { 214 dbg("%s - write request of 0 bytes", __FUNCTION__); 215 return (0); 216 } 217 218 spin_lock_bh(&port->lock); 219 if (port->write_urb_busy) { 220 spin_unlock_bh(&port->lock); 221 dbg("%s - already writing", __FUNCTION__); 222 return 0; 223 } 224 port->write_urb_busy = 1; 225 spin_unlock_bh(&port->lock); 226 227 spin_lock_irqsave(&priv->lock, flags); 228 229 if( (count+priv->wrfilled)>sizeof(priv->wrbuf) ) { 230 /* To much data for buffer. Reset buffer. */ 231 priv->wrfilled=0; 232 spin_unlock_irqrestore(&priv->lock, flags); 233 port->write_urb_busy = 0; 234 return (0); 235 } 236 237 /* Copy data */ 238 memcpy (priv->wrbuf+priv->wrfilled, buf, count); 239 240 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, 241 priv->wrbuf+priv->wrfilled); 242 priv->wrfilled += count; 243 244 if( priv->wrfilled >= 3 ) { 245 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3; 246 dbg("%s - expected data: %d", __FUNCTION__, wrexpected); 247 } else { 248 wrexpected = sizeof(priv->wrbuf); 249 } 250 251 if( priv->wrfilled >= wrexpected ) { 252 /* We have enough data to begin transmission */ 253 int length; 254 255 dbg("%s - transmitting data (frame 1)", __FUNCTION__); 256 length = (wrexpected > port->bulk_out_size) ? port->bulk_out_size : wrexpected; 257 258 memcpy (port->write_urb->transfer_buffer, priv->wrbuf, length ); 259 priv->wrsent=length; 260 261 /* set up our urb */ 262 usb_fill_bulk_urb(port->write_urb, serial->dev, 263 usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress), 264 port->write_urb->transfer_buffer, length, 265 ((serial->type->write_bulk_callback) ? 266 serial->type->write_bulk_callback : 267 cyberjack_write_bulk_callback), 268 port); 269 270 /* send the data out the bulk port */ 271 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 272 if (result) { 273 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 274 /* Throw away data. No better idea what to do with it. */ 275 priv->wrfilled=0; 276 priv->wrsent=0; 277 spin_unlock_irqrestore(&priv->lock, flags); 278 port->write_urb_busy = 0; 279 return 0; 280 } 281 282 dbg("%s - priv->wrsent=%d", __FUNCTION__,priv->wrsent); 283 dbg("%s - priv->wrfilled=%d", __FUNCTION__,priv->wrfilled); 284 285 if( priv->wrsent>=priv->wrfilled ) { 286 dbg("%s - buffer cleaned", __FUNCTION__); 287 memset( priv->wrbuf, 0, sizeof(priv->wrbuf) ); 288 priv->wrfilled=0; 289 priv->wrsent=0; 290 } 291 } 292 293 spin_unlock_irqrestore(&priv->lock, flags); 294 295 return (count); 296 } 297 298 static int cyberjack_write_room( struct usb_serial_port *port ) 299 { 300 return CYBERJACK_LOCAL_BUF_SIZE; 301 } 302 303 static void cyberjack_read_int_callback( struct urb *urb ) 304 { 305 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 306 struct cyberjack_private *priv = usb_get_serial_port_data(port); 307 unsigned char *data = urb->transfer_buffer; 308 int status = urb->status; 309 int result; 310 311 dbg("%s - port %d", __FUNCTION__, port->number); 312 313 /* the urb might have been killed. */ 314 if (status) 315 return; 316 317 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 318 319 /* React only to interrupts signaling a bulk_in transfer */ 320 if( (urb->actual_length==4) && (data[0]==0x01) ) { 321 short old_rdtodo; 322 int result; 323 324 /* This is a announcement of coming bulk_ins. */ 325 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3; 326 327 spin_lock(&priv->lock); 328 329 old_rdtodo = priv->rdtodo; 330 331 if( (old_rdtodo+size)<(old_rdtodo) ) { 332 dbg( "To many bulk_in urbs to do." ); 333 spin_unlock(&priv->lock); 334 goto resubmit; 335 } 336 337 /* "+=" is probably more fault tollerant than "=" */ 338 priv->rdtodo += size; 339 340 dbg("%s - rdtodo: %d", __FUNCTION__, priv->rdtodo); 341 342 spin_unlock(&priv->lock); 343 344 if( !old_rdtodo ) { 345 port->read_urb->dev = port->serial->dev; 346 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 347 if( result ) 348 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 349 dbg("%s - usb_submit_urb(read urb)", __FUNCTION__); 350 } 351 } 352 353 resubmit: 354 port->interrupt_in_urb->dev = port->serial->dev; 355 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); 356 if (result) 357 err(" usb_submit_urb(read int) failed"); 358 dbg("%s - usb_submit_urb(int urb)", __FUNCTION__); 359 } 360 361 static void cyberjack_read_bulk_callback (struct urb *urb) 362 { 363 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 364 struct cyberjack_private *priv = usb_get_serial_port_data(port); 365 struct tty_struct *tty; 366 unsigned char *data = urb->transfer_buffer; 367 short todo; 368 int result; 369 int status = urb->status; 370 371 dbg("%s - port %d", __FUNCTION__, port->number); 372 373 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 374 if (status) { 375 dbg("%s - nonzero read bulk status received: %d", 376 __FUNCTION__, status); 377 return; 378 } 379 380 tty = port->tty; 381 if (!tty) { 382 dbg("%s - ignoring since device not open\n", __FUNCTION__); 383 return; 384 } 385 if (urb->actual_length) { 386 tty_buffer_request_room(tty, urb->actual_length); 387 tty_insert_flip_string(tty, data, urb->actual_length); 388 tty_flip_buffer_push(tty); 389 } 390 391 spin_lock(&priv->lock); 392 393 /* Reduce urbs to do by one. */ 394 priv->rdtodo-=urb->actual_length; 395 /* Just to be sure */ 396 if ( priv->rdtodo<0 ) priv->rdtodo = 0; 397 todo = priv->rdtodo; 398 399 spin_unlock(&priv->lock); 400 401 dbg("%s - rdtodo: %d", __FUNCTION__, todo); 402 403 /* Continue to read if we have still urbs to do. */ 404 if( todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/ ) { 405 port->read_urb->dev = port->serial->dev; 406 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 407 if (result) 408 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 409 dbg("%s - usb_submit_urb(read urb)", __FUNCTION__); 410 } 411 } 412 413 static void cyberjack_write_bulk_callback (struct urb *urb) 414 { 415 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 416 struct cyberjack_private *priv = usb_get_serial_port_data(port); 417 int status = urb->status; 418 419 dbg("%s - port %d", __FUNCTION__, port->number); 420 421 port->write_urb_busy = 0; 422 if (status) { 423 dbg("%s - nonzero write bulk status received: %d", 424 __FUNCTION__, status); 425 return; 426 } 427 428 spin_lock(&priv->lock); 429 430 /* only do something if we have more data to send */ 431 if( priv->wrfilled ) { 432 int length, blksize, result; 433 434 dbg("%s - transmitting data (frame n)", __FUNCTION__); 435 436 length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ? 437 port->bulk_out_size : (priv->wrfilled - priv->wrsent); 438 439 memcpy (port->write_urb->transfer_buffer, priv->wrbuf + priv->wrsent, 440 length ); 441 priv->wrsent+=length; 442 443 /* set up our urb */ 444 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 445 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), 446 port->write_urb->transfer_buffer, length, 447 ((port->serial->type->write_bulk_callback) ? 448 port->serial->type->write_bulk_callback : 449 cyberjack_write_bulk_callback), 450 port); 451 452 /* send the data out the bulk port */ 453 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 454 if (result) { 455 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 456 /* Throw away data. No better idea what to do with it. */ 457 priv->wrfilled=0; 458 priv->wrsent=0; 459 goto exit; 460 } 461 462 dbg("%s - priv->wrsent=%d", __FUNCTION__,priv->wrsent); 463 dbg("%s - priv->wrfilled=%d", __FUNCTION__,priv->wrfilled); 464 465 blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3; 466 467 if( (priv->wrsent>=priv->wrfilled) || (priv->wrsent>=blksize) ) { 468 dbg("%s - buffer cleaned", __FUNCTION__); 469 memset( priv->wrbuf, 0, sizeof(priv->wrbuf) ); 470 priv->wrfilled=0; 471 priv->wrsent=0; 472 } 473 } 474 475 exit: 476 spin_unlock(&priv->lock); 477 usb_serial_port_softint(port); 478 } 479 480 static int __init cyberjack_init (void) 481 { 482 int retval; 483 retval = usb_serial_register(&cyberjack_device); 484 if (retval) 485 goto failed_usb_serial_register; 486 retval = usb_register(&cyberjack_driver); 487 if (retval) 488 goto failed_usb_register; 489 490 info(DRIVER_VERSION " " DRIVER_AUTHOR); 491 info(DRIVER_DESC); 492 493 return 0; 494 failed_usb_register: 495 usb_serial_deregister(&cyberjack_device); 496 failed_usb_serial_register: 497 return retval; 498 } 499 500 static void __exit cyberjack_exit (void) 501 { 502 usb_deregister (&cyberjack_driver); 503 usb_serial_deregister (&cyberjack_device); 504 } 505 506 module_init(cyberjack_init); 507 module_exit(cyberjack_exit); 508 509 MODULE_AUTHOR( DRIVER_AUTHOR ); 510 MODULE_DESCRIPTION( DRIVER_DESC ); 511 MODULE_VERSION( DRIVER_VERSION ); 512 MODULE_LICENSE("GPL"); 513 514 module_param(debug, bool, S_IRUGO | S_IWUSR); 515 MODULE_PARM_DESC(debug, "Debug enabled or not"); 516