1 /* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * Edgeport/4 14 * Edgeport/4t 15 * Edgeport/2 16 * Edgeport/4i 17 * Edgeport/2i 18 * Edgeport/421 19 * Edgeport/21 20 * Rapidport/4 21 * Edgeport/8 22 * Edgeport/2D8 23 * Edgeport/4D8 24 * Edgeport/8i 25 * 26 * For questions or problems with this driver, contact Inside Out 27 * Networks technical support, or Peter Berger <pberger@brimson.com>, 28 * or Al Borchers <alborchers@steinerpoint.com>. 29 * 30 * Version history: 31 * 32 * 2003_04_03 al borchers 33 * - fixed a bug (that shows up with dosemu) where the tty struct is 34 * used in a callback after it has been freed 35 * 36 * 2.3 2002_03_08 greg kroah-hartman 37 * - fixed bug when multiple devices were attached at the same time. 38 * 39 * 2.2 2001_11_14 greg kroah-hartman 40 * - fixed bug in edge_close that kept the port from being used more 41 * than once. 42 * - fixed memory leak on device removal. 43 * - fixed potential double free of memory when command urb submitting 44 * failed. 45 * - other small cleanups when the device is removed 46 * 47 * 2.1 2001_07_09 greg kroah-hartman 48 * - added support for TIOCMBIS and TIOCMBIC. 49 * 50 * (04/08/2001) gb 51 * - Identify version on module load. 52 * 53 * 2.0 2001_03_05 greg kroah-hartman 54 * - reworked entire driver to fit properly in with the other usb-serial 55 * drivers. Occasional oopses still happen, but it's a good start. 56 * 57 * 1.2.3 (02/23/2001) greg kroah-hartman 58 * - changed device table to work properly for 2.4.x final format. 59 * - fixed problem with dropping data at high data rates. 60 * 61 * 1.2.2 (11/27/2000) greg kroah-hartman 62 * - cleaned up more NTisms. 63 * - Added device table for 2.4.0-test11 64 * 65 * 1.2.1 (11/08/2000) greg kroah-hartman 66 * - Started to clean up NTisms. 67 * - Fixed problem with dev field of urb for kernels >= 2.4.0-test9 68 * 69 * 1.2 (10/17/2000) David Iacovelli 70 * Remove all EPIC code and GPL source 71 * Fix RELEVANT_IFLAG macro to include flow control 72 * changes port configuration changes. 73 * Fix redefinition of SERIAL_MAGIC 74 * Change all timeout values to 5 seconds 75 * Tried to fix the UHCI multiple urb submission, but failed miserably. 76 * it seems to work fine with OHCI. 77 * ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must 78 * find a way to work arount this UHCI bug ) 79 * 80 * 1.1 (10/11/2000) David Iacovelli 81 * Fix XON/XOFF flow control to support both IXON and IXOFF 82 * 83 * 0.9.27 (06/30/2000) David Iacovelli 84 * Added transmit queue and now allocate urb for command writes. 85 * 86 * 0.9.26 (06/29/2000) David Iacovelli 87 * Add support for 80251 based edgeport 88 * 89 * 0.9.25 (06/27/2000) David Iacovelli 90 * Do not close the port if it has multiple opens. 91 * 92 * 0.9.24 (05/26/2000) David Iacovelli 93 * Add IOCTLs to support RXTX and JAVA POS 94 * and first cut at running BlackBox Demo 95 * 96 * 0.9.23 (05/24/2000) David Iacovelli 97 * Add IOCTLs to support RXTX and JAVA POS 98 * 99 * 0.9.22 (05/23/2000) David Iacovelli 100 * fixed bug in enumeration. If epconfig turns on mapping by 101 * path after a device is already plugged in, we now update 102 * the mapping correctly 103 * 104 * 0.9.21 (05/16/2000) David Iacovelli 105 * Added BlockUntilChaseResp() to also wait for txcredits 106 * Updated the way we allocate and handle write URBs 107 * Add debug code to dump buffers 108 * 109 * 0.9.20 (05/01/2000) David Iacovelli 110 * change driver to use usb/tts/ 111 * 112 * 0.9.19 (05/01/2000) David Iacovelli 113 * Update code to compile if DEBUG is off 114 * 115 * 0.9.18 (04/28/2000) David Iacovelli 116 * cleanup and test tty_register with devfs 117 * 118 * 0.9.17 (04/27/2000) greg kroah-hartman 119 * changed tty_register around to be like the way it 120 * was before, but now it works properly with devfs. 121 * 122 * 0.9.16 (04/26/2000) david iacovelli 123 * Fixed bug in GetProductInfo() 124 * 125 * 0.9.15 (04/25/2000) david iacovelli 126 * Updated enumeration 127 * 128 * 0.9.14 (04/24/2000) david iacovelli 129 * Removed all config/status IOCTLS and 130 * converted to using /proc/edgeport 131 * still playing with devfs 132 * 133 * 0.9.13 (04/24/2000) david iacovelli 134 * Removed configuration based on ttyUSB0 135 * Added support for configuration using /prod/edgeport 136 * first attempt at using devfs (not working yet!) 137 * Added IOCTL to GetProductInfo() 138 * Added support for custom baud rates 139 * Add support for random port numbers 140 * 141 * 0.9.12 (04/18/2000) david iacovelli 142 * added additional configuration IOCTLs 143 * use ttyUSB0 for configuration 144 * 145 * 0.9.11 (04/17/2000) greg kroah-hartman 146 * fixed module initialization race conditions. 147 * made all urbs dynamically allocated. 148 * made driver devfs compatible. now it only registers the tty device 149 * when the device is actually plugged in. 150 * 151 * 0.9.10 (04/13/2000) greg kroah-hartman 152 * added proc interface framework. 153 * 154 * 0.9.9 (04/13/2000) david iacovelli 155 * added enumeration code and ioctls to configure the device 156 * 157 * 0.9.8 (04/12/2000) david iacovelli 158 * Change interrupt read start when device is plugged in 159 * and stop when device is removed 160 * process interrupt reads when all ports are closed 161 * (keep value of rxBytesAvail consistent with the edgeport) 162 * set the USB_BULK_QUEUE flag so that we can shove a bunch 163 * of urbs at once down the pipe 164 * 165 * 0.9.7 (04/10/2000) david iacovelli 166 * start to add enumeration code. 167 * generate serial number for epic devices 168 * add support for kdb 169 * 170 * 0.9.6 (03/30/2000) david iacovelli 171 * add IOCTL to get string, manufacture, and boot descriptors 172 * 173 * 0.9.5 (03/14/2000) greg kroah-hartman 174 * more error checking added to SerialOpen to try to fix UHCI open problem 175 * 176 * 0.9.4 (03/09/2000) greg kroah-hartman 177 * added more error checking to handle oops when data is hanging 178 * around and tty is abruptly closed. 179 * 180 * 0.9.3 (03/09/2000) david iacovelli 181 * Add epic support for xon/xoff chars 182 * play with performance 183 * 184 * 0.9.2 (03/08/2000) greg kroah-hartman 185 * changed most "info" calls to "dbg" 186 * implemented flow control properly in the termios call 187 * 188 * 0.9.1 (03/08/2000) david iacovelli 189 * added EPIC support 190 * enabled bootloader update 191 * 192 * 0.9 (03/08/2000) greg kroah-hartman 193 * Release to IO networks. 194 * Integrated changes that David made 195 * made getting urbs for writing SMP safe 196 * 197 * 0.8 (03/07/2000) greg kroah-hartman 198 * Release to IO networks. 199 * Fixed problems that were seen in code by David. 200 * Now both Edgeport/4 and Edgeport/2 works properly. 201 * Changed most of the functions to use port instead of serial. 202 * 203 * 0.7 (02/27/2000) greg kroah-hartman 204 * Milestone 3 release. 205 * Release to IO Networks 206 * ioctl for waiting on line change implemented. 207 * ioctl for getting statistics implemented. 208 * multiport support working. 209 * lsr and msr registers are now handled properly. 210 * change break now hooked up and working. 211 * support for all known Edgeport devices. 212 * 213 * 0.6 (02/22/2000) greg kroah-hartman 214 * Release to IO networks. 215 * CHASE is implemented correctly when port is closed. 216 * SerialOpen now blocks correctly until port is fully opened. 217 * 218 * 0.5 (02/20/2000) greg kroah-hartman 219 * Release to IO networks. 220 * Known problems: 221 * modem status register changes are not sent on to the user 222 * CHASE is not implemented when the port is closed. 223 * 224 * 0.4 (02/16/2000) greg kroah-hartman 225 * Second cut at the CeBit demo. 226 * Doesn't leak memory on every write to the port 227 * Still small leaks on startup. 228 * Added support for Edgeport/2 and Edgeport/8 229 * 230 * 0.3 (02/15/2000) greg kroah-hartman 231 * CeBit demo release. 232 * Force the line settings to 4800, 8, 1, e for the demo. 233 * Warning! This version leaks memory like crazy! 234 * 235 * 0.2 (01/30/2000) greg kroah-hartman 236 * Milestone 1 release. 237 * Device is found by USB subsystem, enumerated, fimware is downloaded 238 * and the descriptors are printed to the debug log, config is set, and 239 * green light starts to blink. Open port works, and data can be sent 240 * and received at the default settings of the UART. Loopback connector 241 * and debug log confirms this. 242 * 243 * 0.1 (01/23/2000) greg kroah-hartman 244 * Initial release to help IO Networks try to set up their test system. 245 * Edgeport4 is recognized, firmware is downloaded, config is set so 246 * device blinks green light every 3 sec. Port is bound, but opening, 247 * closing, and sending data do not work properly. 248 * 249 */ 250 251 #include <linux/config.h> 252 #include <linux/kernel.h> 253 #include <linux/jiffies.h> 254 #include <linux/errno.h> 255 #include <linux/init.h> 256 #include <linux/slab.h> 257 #include <linux/tty.h> 258 #include <linux/tty_driver.h> 259 #include <linux/tty_flip.h> 260 #include <linux/module.h> 261 #include <linux/spinlock.h> 262 #include <linux/serial.h> 263 #include <linux/ioctl.h> 264 #include <linux/wait.h> 265 #include <asm/uaccess.h> 266 #include <linux/usb.h> 267 #include "usb-serial.h" 268 #include "io_edgeport.h" 269 #include "io_ionsp.h" /* info for the iosp messages */ 270 #include "io_16654.h" /* 16654 UART defines */ 271 272 /* 273 * Version Information 274 */ 275 #define DRIVER_VERSION "v2.7" 276 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 277 #define DRIVER_DESC "Edgeport USB Serial Driver" 278 279 /* First, the latest boot code - for first generation edgeports */ 280 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1 281 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1 282 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */ 283 284 /* for second generation edgeports */ 285 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2 286 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2 287 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */ 288 289 /* Then finally the main run-time operational code - for first generation edgeports */ 290 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1 291 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1 292 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */ 293 294 /* for second generation edgeports */ 295 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2 296 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2 297 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */ 298 299 #define MAX_NAME_LEN 64 300 301 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 302 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 303 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 304 305 /* receive port state */ 306 enum RXSTATE { 307 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 308 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 309 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 310 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 311 }; 312 313 314 /* Transmit Fifo 315 * This Transmit queue is an extension of the edgeport Rx buffer. 316 * The maximum amount of data buffered in both the edgeport 317 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 318 */ 319 struct TxFifo { 320 unsigned int head; /* index to head pointer (write) */ 321 unsigned int tail; /* index to tail pointer (read) */ 322 unsigned int count; /* Bytes in queue */ 323 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 324 unsigned char *fifo; /* allocated Buffer */ 325 }; 326 327 /* This structure holds all of the local port information */ 328 struct edgeport_port { 329 __u16 txCredits; /* our current credits for this port */ 330 __u16 maxTxCredits; /* the max size of the port */ 331 332 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 333 struct urb *write_urb; /* write URB for this port */ 334 char write_in_progress; /* TRUE while a write URB is outstanding */ 335 spinlock_t ep_lock; 336 337 __u8 shadowLCR; /* last LCR value received */ 338 __u8 shadowMCR; /* last MCR value received */ 339 __u8 shadowMSR; /* last MSR value received */ 340 __u8 shadowLSR; /* last LSR value received */ 341 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 342 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 343 __u8 validDataMask; 344 __u32 baudRate; 345 346 char open; 347 char openPending; 348 char commandPending; 349 char closePending; 350 char chaseResponsePending; 351 352 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 353 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 354 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 355 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 356 357 struct async_icount icount; 358 struct usb_serial_port *port; /* loop back to the owner of this object */ 359 }; 360 361 362 /* This structure holds all of the individual device information */ 363 struct edgeport_serial { 364 char name[MAX_NAME_LEN+1]; /* string name of this device */ 365 366 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 367 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 368 struct edgeport_product_info product_info; /* Product Info */ 369 370 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 371 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 372 struct urb * interrupt_read_urb; /* our interrupt urb */ 373 374 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 375 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 376 struct urb * read_urb; /* our bulk read urb */ 377 int read_in_progress; 378 spinlock_t es_lock; 379 380 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 381 382 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 383 384 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 385 __u8 rxHeader1; /* receive header byte 1 */ 386 __u8 rxHeader2; /* receive header byte 2 */ 387 __u8 rxHeader3; /* receive header byte 3 */ 388 __u8 rxPort; /* the port that we are currently receiving data for */ 389 __u8 rxStatusCode; /* the receive status code */ 390 __u8 rxStatusParam; /* the receive status paramater */ 391 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 392 struct usb_serial *serial; /* loop back to the owner of this object */ 393 }; 394 395 /* baud rate information */ 396 struct divisor_table_entry { 397 __u32 BaudRate; 398 __u16 Divisor; 399 }; 400 401 // 402 // Define table of divisors for Rev A EdgePort/4 hardware 403 // These assume a 3.6864MHz crystal, the standard /16, and 404 // MCR.7 = 0. 405 // 406 static struct divisor_table_entry divisor_table[] = { 407 { 50, 4608}, 408 { 75, 3072}, 409 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 410 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 411 { 150, 1536}, 412 { 300, 768}, 413 { 600, 384}, 414 { 1200, 192}, 415 { 1800, 128}, 416 { 2400, 96}, 417 { 4800, 48}, 418 { 7200, 32}, 419 { 9600, 24}, 420 { 14400, 16}, 421 { 19200, 12}, 422 { 38400, 6}, 423 { 57600, 4}, 424 { 115200, 2}, 425 { 230400, 1}, 426 }; 427 428 /* local variables */ 429 static int debug; 430 431 static int low_latency = 1; /* tty low latency flag, on by default */ 432 433 static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */ 434 435 436 /* local function prototypes */ 437 438 /* function prototypes for all URB callbacks */ 439 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs); 440 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs); 441 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs); 442 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs); 443 444 /* function prototypes for the usbserial callbacks */ 445 static int edge_open (struct usb_serial_port *port, struct file *filp); 446 static void edge_close (struct usb_serial_port *port, struct file *filp); 447 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count); 448 static int edge_write_room (struct usb_serial_port *port); 449 static int edge_chars_in_buffer (struct usb_serial_port *port); 450 static void edge_throttle (struct usb_serial_port *port); 451 static void edge_unthrottle (struct usb_serial_port *port); 452 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios); 453 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 454 static void edge_break (struct usb_serial_port *port, int break_state); 455 static int edge_tiocmget (struct usb_serial_port *port, struct file *file); 456 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 457 static int edge_startup (struct usb_serial *serial); 458 static void edge_shutdown (struct usb_serial *serial); 459 460 461 #include "io_tables.h" /* all of the devices that this driver supports */ 462 463 static struct usb_driver io_driver = { 464 .owner = THIS_MODULE, 465 .name = "io_edgeport", 466 .probe = usb_serial_probe, 467 .disconnect = usb_serial_disconnect, 468 .id_table = id_table_combined, 469 }; 470 471 /* function prototypes for all of our local functions */ 472 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); 473 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); 474 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length); 475 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr); 476 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); 477 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param); 478 static int calc_baud_rate_divisor (int baud_rate, int *divisor); 479 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate); 480 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios); 481 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue); 482 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength); 483 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port); 484 485 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 486 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 487 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 488 static void get_manufacturing_desc (struct edgeport_serial *edge_serial); 489 static void get_boot_desc (struct edgeport_serial *edge_serial); 490 static void load_application_firmware (struct edgeport_serial *edge_serial); 491 492 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size); 493 494 495 // ************************************************************************ 496 // ************************************************************************ 497 // ************************************************************************ 498 // ************************************************************************ 499 500 /************************************************************************ 501 * * 502 * update_edgeport_E2PROM() Compare current versions of * 503 * Boot ROM and Manufacture * 504 * Descriptors with versions * 505 * embedded in this driver * 506 * * 507 ************************************************************************/ 508 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) 509 { 510 __u32 BootCurVer; 511 __u32 BootNewVer; 512 __u8 BootMajorVersion; 513 __u8 BootMinorVersion; 514 __le16 BootBuildNumber; 515 __u8 *BootImage; 516 __u32 BootSize; 517 struct edge_firmware_image_record *record; 518 unsigned char *firmware; 519 int response; 520 521 522 switch (edge_serial->product_info.iDownloadFile) { 523 case EDGE_DOWNLOAD_FILE_I930: 524 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion; 525 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion; 526 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber); 527 BootImage = &BootCodeImage_GEN1[0]; 528 BootSize = sizeof( BootCodeImage_GEN1 ); 529 break; 530 531 case EDGE_DOWNLOAD_FILE_80251: 532 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion; 533 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion; 534 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber); 535 BootImage = &BootCodeImage_GEN2[0]; 536 BootSize = sizeof( BootCodeImage_GEN2 ); 537 break; 538 539 default: 540 return; 541 } 542 543 // Check Boot Image Version 544 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 545 (edge_serial->boot_descriptor.MinorVersion << 16) + 546 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 547 548 BootNewVer = (BootMajorVersion << 24) + 549 (BootMinorVersion << 16) + 550 le16_to_cpu(BootBuildNumber); 551 552 dbg("Current Boot Image version %d.%d.%d", 553 edge_serial->boot_descriptor.MajorVersion, 554 edge_serial->boot_descriptor.MinorVersion, 555 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 556 557 558 if (BootNewVer > BootCurVer) { 559 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 560 edge_serial->boot_descriptor.MajorVersion, 561 edge_serial->boot_descriptor.MinorVersion, 562 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 563 BootMajorVersion, 564 BootMinorVersion, 565 le16_to_cpu(BootBuildNumber)); 566 567 568 dbg("Downloading new Boot Image"); 569 570 firmware = BootImage; 571 572 for (;;) { 573 record = (struct edge_firmware_image_record *)firmware; 574 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 575 if (response < 0) { 576 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 577 break; 578 } 579 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 580 if (firmware >= &BootImage[BootSize]) { 581 break; 582 } 583 } 584 } else { 585 dbg("Boot Image -- already up to date"); 586 } 587 } 588 589 590 /************************************************************************ 591 * * 592 * Get string descriptor from device * 593 * * 594 ************************************************************************/ 595 static int get_string (struct usb_device *dev, int Id, char *string) 596 { 597 struct usb_string_descriptor StringDesc; 598 struct usb_string_descriptor *pStringDesc; 599 600 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 601 602 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 603 return 0; 604 } 605 606 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 607 608 if (!pStringDesc) { 609 return 0; 610 } 611 612 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 613 kfree(pStringDesc); 614 return 0; 615 } 616 617 unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1); 618 619 kfree(pStringDesc); 620 return strlen(string); 621 } 622 623 624 #if 0 625 /************************************************************************ 626 * 627 * Get string descriptor from device 628 * 629 ************************************************************************/ 630 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc) 631 { 632 struct usb_string_descriptor StringDesc; 633 struct usb_string_descriptor *pStringDesc; 634 635 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 636 637 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 638 return 0; 639 } 640 641 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 642 643 if (!pStringDesc) { 644 return -1; 645 } 646 647 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 648 kfree(pStringDesc); 649 return -1; 650 } 651 652 *pRetDesc = pStringDesc; 653 return 0; 654 } 655 #endif 656 657 static void get_product_info(struct edgeport_serial *edge_serial) 658 { 659 struct edgeport_product_info *product_info = &edge_serial->product_info; 660 661 memset (product_info, 0, sizeof(struct edgeport_product_info)); 662 663 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 664 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 665 product_info->ProdInfoVer = 0; 666 667 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 668 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 669 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 670 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 671 672 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion; 673 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion; 674 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber; 675 676 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate)); 677 678 // check if this is 2nd generation hardware 679 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) { 680 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion; 681 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion; 682 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber); 683 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 684 } else { 685 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion; 686 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion; 687 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber); 688 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 689 } 690 691 // Determine Product type and set appropriate flags 692 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 693 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 694 case ION_DEVICE_ID_EDGEPORT_4T: 695 case ION_DEVICE_ID_EDGEPORT_4: 696 case ION_DEVICE_ID_EDGEPORT_2: 697 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 698 case ION_DEVICE_ID_EDGEPORT_8: 699 case ION_DEVICE_ID_EDGEPORT_421: 700 case ION_DEVICE_ID_EDGEPORT_21: 701 case ION_DEVICE_ID_EDGEPORT_2_DIN: 702 case ION_DEVICE_ID_EDGEPORT_4_DIN: 703 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 704 product_info->IsRS232 = 1; 705 break; 706 707 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485 708 product_info->IsRS422 = 1; 709 product_info->IsRS485 = 1; 710 break; 711 712 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422 713 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422 714 product_info->IsRS422 = 1; 715 break; 716 } 717 718 // Dump Product Info structure 719 dbg("**Product Information:"); 720 dbg(" ProductId %x", product_info->ProductId ); 721 dbg(" NumPorts %d", product_info->NumPorts ); 722 dbg(" ProdInfoVer %d", product_info->ProdInfoVer ); 723 dbg(" IsServer %d", product_info->IsServer); 724 dbg(" IsRS232 %d", product_info->IsRS232 ); 725 dbg(" IsRS422 %d", product_info->IsRS422 ); 726 dbg(" IsRS485 %d", product_info->IsRS485 ); 727 dbg(" RomSize %d", product_info->RomSize ); 728 dbg(" RamSize %d", product_info->RamSize ); 729 dbg(" CpuRev %x", product_info->CpuRev ); 730 dbg(" BoardRev %x", product_info->BoardRev); 731 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 732 product_info->BootMinorVersion, 733 le16_to_cpu(product_info->BootBuildNumber)); 734 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion, 735 product_info->FirmwareMinorVersion, 736 le16_to_cpu(product_info->FirmwareBuildNumber)); 737 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0], 738 product_info->ManufactureDescDate[1], 739 product_info->ManufactureDescDate[2]+1900); 740 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 741 742 } 743 744 745 /************************************************************************/ 746 /************************************************************************/ 747 /* U S B C A L L B A C K F U N C T I O N S */ 748 /* U S B C A L L B A C K F U N C T I O N S */ 749 /************************************************************************/ 750 /************************************************************************/ 751 752 /***************************************************************************** 753 * edge_interrupt_callback 754 * this is the callback function for when we have received data on the 755 * interrupt endpoint. 756 *****************************************************************************/ 757 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs) 758 { 759 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 760 struct edgeport_port *edge_port; 761 struct usb_serial_port *port; 762 unsigned char *data = urb->transfer_buffer; 763 int length = urb->actual_length; 764 int bytes_avail; 765 int position; 766 int txCredits; 767 int portNumber; 768 int result; 769 770 dbg("%s", __FUNCTION__); 771 772 switch (urb->status) { 773 case 0: 774 /* success */ 775 break; 776 case -ECONNRESET: 777 case -ENOENT: 778 case -ESHUTDOWN: 779 /* this urb is terminated, clean up */ 780 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 781 return; 782 default: 783 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 784 goto exit; 785 } 786 787 // process this interrupt-read even if there are no ports open 788 if (length) { 789 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data); 790 791 if (length > 1) { 792 bytes_avail = data[0] | (data[1] << 8); 793 if (bytes_avail) { 794 spin_lock(&edge_serial->es_lock); 795 edge_serial->rxBytesAvail += bytes_avail; 796 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 797 798 if (edge_serial->rxBytesAvail > 0 && 799 !edge_serial->read_in_progress) { 800 dbg("%s - posting a read", __FUNCTION__); 801 edge_serial->read_in_progress = TRUE; 802 803 /* we have pending bytes on the bulk in pipe, send a request */ 804 edge_serial->read_urb->dev = edge_serial->serial->dev; 805 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 806 if (result) { 807 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result); 808 edge_serial->read_in_progress = FALSE; 809 } 810 } 811 spin_unlock(&edge_serial->es_lock); 812 } 813 } 814 /* grab the txcredits for the ports if available */ 815 position = 2; 816 portNumber = 0; 817 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { 818 txCredits = data[position] | (data[position+1] << 8); 819 if (txCredits) { 820 port = edge_serial->serial->port[portNumber]; 821 edge_port = usb_get_serial_port_data(port); 822 if (edge_port->open) { 823 spin_lock(&edge_port->ep_lock); 824 edge_port->txCredits += txCredits; 825 spin_unlock(&edge_port->ep_lock); 826 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); 827 828 /* tell the tty driver that something has changed */ 829 if (edge_port->port->tty) 830 tty_wakeup(edge_port->port->tty); 831 832 // Since we have more credit, check if more data can be sent 833 send_more_port_data(edge_serial, edge_port); 834 } 835 } 836 position += 2; 837 ++portNumber; 838 } 839 } 840 841 exit: 842 result = usb_submit_urb (urb, GFP_ATOMIC); 843 if (result) { 844 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result); 845 } 846 } 847 848 849 /***************************************************************************** 850 * edge_bulk_in_callback 851 * this is the callback function for when we have received data on the 852 * bulk in endpoint. 853 *****************************************************************************/ 854 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs) 855 { 856 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 857 unsigned char *data = urb->transfer_buffer; 858 int status; 859 __u16 raw_data_length; 860 861 dbg("%s", __FUNCTION__); 862 863 if (urb->status) { 864 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 865 edge_serial->read_in_progress = FALSE; 866 return; 867 } 868 869 if (urb->actual_length == 0) { 870 dbg("%s - read bulk callback with no data", __FUNCTION__); 871 edge_serial->read_in_progress = FALSE; 872 return; 873 } 874 875 raw_data_length = urb->actual_length; 876 877 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data); 878 879 spin_lock(&edge_serial->es_lock); 880 881 /* decrement our rxBytes available by the number that we just got */ 882 edge_serial->rxBytesAvail -= raw_data_length; 883 884 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); 885 886 process_rcvd_data (edge_serial, data, urb->actual_length); 887 888 /* check to see if there's any more data for us to read */ 889 if (edge_serial->rxBytesAvail > 0) { 890 dbg("%s - posting a read", __FUNCTION__); 891 edge_serial->read_urb->dev = edge_serial->serial->dev; 892 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 893 if (status) { 894 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status); 895 edge_serial->read_in_progress = FALSE; 896 } 897 } else { 898 edge_serial->read_in_progress = FALSE; 899 } 900 901 spin_unlock(&edge_serial->es_lock); 902 } 903 904 905 /***************************************************************************** 906 * edge_bulk_out_data_callback 907 * this is the callback function for when we have finished sending serial data 908 * on the bulk out endpoint. 909 *****************************************************************************/ 910 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs) 911 { 912 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 913 struct tty_struct *tty; 914 915 dbg("%s", __FUNCTION__); 916 917 if (urb->status) { 918 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 919 } 920 921 tty = edge_port->port->tty; 922 923 if (tty && edge_port->open) { 924 /* let the tty driver wakeup if it has a special write_wakeup function */ 925 tty_wakeup(tty); 926 } 927 928 // Release the Write URB 929 edge_port->write_in_progress = FALSE; 930 931 // Check if more data needs to be sent 932 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port); 933 } 934 935 936 /***************************************************************************** 937 * BulkOutCmdCallback 938 * this is the callback function for when we have finished sending a command 939 * on the bulk out endpoint. 940 *****************************************************************************/ 941 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs) 942 { 943 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 944 struct tty_struct *tty; 945 int status = urb->status; 946 947 dbg("%s", __FUNCTION__); 948 949 CmdUrbs--; 950 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 951 952 953 /* clean up the transfer buffer */ 954 kfree(urb->transfer_buffer); 955 956 /* Free the command urb */ 957 usb_free_urb (urb); 958 959 if (status) { 960 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); 961 return; 962 } 963 964 /* Get pointer to tty */ 965 tty = edge_port->port->tty; 966 967 /* tell the tty driver that something has changed */ 968 if (tty && edge_port->open) 969 tty_wakeup(tty); 970 971 /* we have completed the command */ 972 edge_port->commandPending = FALSE; 973 wake_up(&edge_port->wait_command); 974 } 975 976 977 /***************************************************************************** 978 * Driver tty interface functions 979 *****************************************************************************/ 980 981 /***************************************************************************** 982 * SerialOpen 983 * this function is called by the tty driver when a port is opened 984 * If successful, we return 0 985 * Otherwise we return a negative error number. 986 *****************************************************************************/ 987 static int edge_open (struct usb_serial_port *port, struct file * filp) 988 { 989 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 990 struct usb_serial *serial; 991 struct edgeport_serial *edge_serial; 992 int response; 993 994 dbg("%s - port %d", __FUNCTION__, port->number); 995 996 if (edge_port == NULL) 997 return -ENODEV; 998 999 if (port->tty) 1000 port->tty->low_latency = low_latency; 1001 1002 /* see if we've set up our endpoint info yet (can't set it up in edge_startup 1003 as the structures were not set up at that time.) */ 1004 serial = port->serial; 1005 edge_serial = usb_get_serial_data(serial); 1006 if (edge_serial == NULL) { 1007 return -ENODEV; 1008 } 1009 if (edge_serial->interrupt_in_buffer == NULL) { 1010 struct usb_serial_port *port0 = serial->port[0]; 1011 1012 /* not set up yet, so do it now */ 1013 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; 1014 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; 1015 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 1016 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 1017 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; 1018 edge_serial->read_urb = port0->read_urb; 1019 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; 1020 1021 /* set up our interrupt urb */ 1022 usb_fill_int_urb(edge_serial->interrupt_read_urb, 1023 serial->dev, 1024 usb_rcvintpipe(serial->dev, 1025 port0->interrupt_in_endpointAddress), 1026 port0->interrupt_in_buffer, 1027 edge_serial->interrupt_read_urb->transfer_buffer_length, 1028 edge_interrupt_callback, edge_serial, 1029 edge_serial->interrupt_read_urb->interval); 1030 1031 /* set up our bulk in urb */ 1032 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 1033 usb_rcvbulkpipe(serial->dev, 1034 port0->bulk_in_endpointAddress), 1035 port0->bulk_in_buffer, 1036 edge_serial->read_urb->transfer_buffer_length, 1037 edge_bulk_in_callback, edge_serial); 1038 edge_serial->read_in_progress = FALSE; 1039 1040 /* start interrupt read for this edgeport 1041 * this interrupt will continue as long as the edgeport is connected */ 1042 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL); 1043 if (response) { 1044 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response); 1045 } 1046 } 1047 1048 /* initialize our wait queues */ 1049 init_waitqueue_head(&edge_port->wait_open); 1050 init_waitqueue_head(&edge_port->wait_chase); 1051 init_waitqueue_head(&edge_port->delta_msr_wait); 1052 init_waitqueue_head(&edge_port->wait_command); 1053 1054 /* initialize our icount structure */ 1055 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 1056 1057 /* initialize our port settings */ 1058 edge_port->txCredits = 0; /* Can't send any data yet */ 1059 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ 1060 edge_port->chaseResponsePending = FALSE; 1061 1062 /* send a open port command */ 1063 edge_port->openPending = TRUE; 1064 edge_port->open = FALSE; 1065 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); 1066 1067 if (response < 0) { 1068 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__); 1069 edge_port->openPending = FALSE; 1070 return -ENODEV; 1071 } 1072 1073 /* now wait for the port to be completely opened */ 1074 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT); 1075 1076 if (edge_port->open == FALSE) { 1077 /* open timed out */ 1078 dbg("%s - open timedout", __FUNCTION__); 1079 edge_port->openPending = FALSE; 1080 return -ENODEV; 1081 } 1082 1083 /* create the txfifo */ 1084 edge_port->txfifo.head = 0; 1085 edge_port->txfifo.tail = 0; 1086 edge_port->txfifo.count = 0; 1087 edge_port->txfifo.size = edge_port->maxTxCredits; 1088 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL); 1089 1090 if (!edge_port->txfifo.fifo) { 1091 dbg("%s - no memory", __FUNCTION__); 1092 edge_close (port, filp); 1093 return -ENOMEM; 1094 } 1095 1096 /* Allocate a URB for the write */ 1097 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL); 1098 edge_port->write_in_progress = FALSE; 1099 1100 if (!edge_port->write_urb) { 1101 dbg("%s - no memory", __FUNCTION__); 1102 edge_close (port, filp); 1103 return -ENOMEM; 1104 } 1105 1106 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); 1107 1108 dbg("%s exited", __FUNCTION__); 1109 1110 return 0; 1111 } 1112 1113 1114 /************************************************************************ 1115 * 1116 * block_until_chase_response 1117 * 1118 * This function will block the close until one of the following: 1119 * 1. Response to our Chase comes from Edgeport 1120 * 2. A timout of 10 seconds without activity has expired 1121 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 1122 * 1123 ************************************************************************/ 1124 static void block_until_chase_response(struct edgeport_port *edge_port) 1125 { 1126 DEFINE_WAIT(wait); 1127 __u16 lastCredits; 1128 int timeout = 1*HZ; 1129 int loop = 10; 1130 1131 while (1) { 1132 // Save Last credits 1133 lastCredits = edge_port->txCredits; 1134 1135 // Did we get our Chase response 1136 if (edge_port->chaseResponsePending == FALSE) { 1137 dbg("%s - Got Chase Response", __FUNCTION__); 1138 1139 // did we get all of our credit back? 1140 if (edge_port->txCredits == edge_port->maxTxCredits ) { 1141 dbg("%s - Got all credits", __FUNCTION__); 1142 return; 1143 } 1144 } 1145 1146 // Block the thread for a while 1147 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 1148 schedule_timeout(timeout); 1149 finish_wait(&edge_port->wait_chase, &wait); 1150 1151 if (lastCredits == edge_port->txCredits) { 1152 // No activity.. count down. 1153 loop--; 1154 if (loop == 0) { 1155 edge_port->chaseResponsePending = FALSE; 1156 dbg("%s - Chase TIMEOUT", __FUNCTION__); 1157 return; 1158 } 1159 } else { 1160 // Reset timout value back to 10 seconds 1161 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); 1162 loop = 10; 1163 } 1164 } 1165 } 1166 1167 1168 /************************************************************************ 1169 * 1170 * block_until_tx_empty 1171 * 1172 * This function will block the close until one of the following: 1173 * 1. TX count are 0 1174 * 2. The edgeport has stopped 1175 * 3. A timout of 3 seconds without activity has expired 1176 * 1177 ************************************************************************/ 1178 static void block_until_tx_empty (struct edgeport_port *edge_port) 1179 { 1180 DEFINE_WAIT(wait); 1181 struct TxFifo *fifo = &edge_port->txfifo; 1182 __u32 lastCount; 1183 int timeout = HZ/10; 1184 int loop = 30; 1185 1186 while (1) { 1187 // Save Last count 1188 lastCount = fifo->count; 1189 1190 // Is the Edgeport Buffer empty? 1191 if (lastCount == 0) { 1192 dbg("%s - TX Buffer Empty", __FUNCTION__); 1193 return; 1194 } 1195 1196 // Block the thread for a while 1197 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 1198 schedule_timeout(timeout); 1199 finish_wait(&edge_port->wait_chase, &wait); 1200 1201 dbg("%s wait", __FUNCTION__); 1202 1203 if (lastCount == fifo->count) { 1204 // No activity.. count down. 1205 loop--; 1206 if (loop == 0) { 1207 dbg("%s - TIMEOUT", __FUNCTION__); 1208 return; 1209 } 1210 } else { 1211 // Reset timout value back to seconds 1212 loop = 30; 1213 } 1214 } 1215 } 1216 1217 1218 /***************************************************************************** 1219 * edge_close 1220 * this function is called by the tty driver when a port is closed 1221 *****************************************************************************/ 1222 static void edge_close (struct usb_serial_port *port, struct file * filp) 1223 { 1224 struct edgeport_serial *edge_serial; 1225 struct edgeport_port *edge_port; 1226 int status; 1227 1228 dbg("%s - port %d", __FUNCTION__, port->number); 1229 1230 edge_serial = usb_get_serial_data(port->serial); 1231 edge_port = usb_get_serial_port_data(port); 1232 if ((edge_serial == NULL) || (edge_port == NULL)) 1233 return; 1234 1235 // block until tx is empty 1236 block_until_tx_empty(edge_port); 1237 1238 edge_port->closePending = TRUE; 1239 1240 /* flush and chase */ 1241 edge_port->chaseResponsePending = TRUE; 1242 1243 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1244 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1245 if (status == 0) { 1246 // block until chase finished 1247 block_until_chase_response(edge_port); 1248 } else { 1249 edge_port->chaseResponsePending = FALSE; 1250 } 1251 1252 /* close the port */ 1253 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); 1254 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); 1255 1256 //port->close = TRUE; 1257 edge_port->closePending = FALSE; 1258 edge_port->open = FALSE; 1259 edge_port->openPending = FALSE; 1260 1261 if (edge_port->write_urb) { 1262 usb_kill_urb(edge_port->write_urb); 1263 } 1264 1265 if (edge_port->write_urb) { 1266 /* if this urb had a transfer buffer already (old transfer) free it */ 1267 kfree(edge_port->write_urb->transfer_buffer); 1268 usb_free_urb(edge_port->write_urb); 1269 edge_port->write_urb = NULL; 1270 } 1271 kfree(edge_port->txfifo.fifo); 1272 edge_port->txfifo.fifo = NULL; 1273 1274 dbg("%s exited", __FUNCTION__); 1275 } 1276 1277 /***************************************************************************** 1278 * SerialWrite 1279 * this function is called by the tty driver when data should be written to 1280 * the port. 1281 * If successful, we return the number of bytes written, otherwise we return 1282 * a negative error number. 1283 *****************************************************************************/ 1284 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count) 1285 { 1286 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1287 struct TxFifo *fifo; 1288 int copySize; 1289 int bytesleft; 1290 int firsthalf; 1291 int secondhalf; 1292 unsigned long flags; 1293 1294 dbg("%s - port %d", __FUNCTION__, port->number); 1295 1296 if (edge_port == NULL) 1297 return -ENODEV; 1298 1299 // get a pointer to the Tx fifo 1300 fifo = &edge_port->txfifo; 1301 1302 spin_lock_irqsave(&edge_port->ep_lock, flags); 1303 1304 // calculate number of bytes to put in fifo 1305 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); 1306 1307 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, 1308 port->number, count, edge_port->txCredits - fifo->count, copySize); 1309 1310 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ 1311 if (copySize == 0) { 1312 dbg("%s - copySize = Zero", __FUNCTION__); 1313 goto finish_write; 1314 } 1315 1316 // queue the data 1317 // since we can never overflow the buffer we do not have to check for full condition 1318 1319 // the copy is done is two parts -- first fill to the end of the buffer 1320 // then copy the reset from the start of the buffer 1321 1322 bytesleft = fifo->size - fifo->head; 1323 firsthalf = min (bytesleft, copySize); 1324 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); 1325 1326 /* now copy our data */ 1327 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1328 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]); 1329 1330 // update the index and size 1331 fifo->head += firsthalf; 1332 fifo->count += firsthalf; 1333 1334 // wrap the index 1335 if (fifo->head == fifo->size) { 1336 fifo->head = 0; 1337 } 1338 1339 secondhalf = copySize-firsthalf; 1340 1341 if (secondhalf) { 1342 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); 1343 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1344 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]); 1345 // update the index and size 1346 fifo->count += secondhalf; 1347 fifo->head += secondhalf; 1348 // No need to check for wrap since we can not get to end of fifo in this part 1349 } 1350 1351 finish_write: 1352 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1353 1354 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port); 1355 1356 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); 1357 1358 return copySize; 1359 } 1360 1361 1362 /************************************************************************ 1363 * 1364 * send_more_port_data() 1365 * 1366 * This routine attempts to write additional UART transmit data 1367 * to a port over the USB bulk pipe. It is called (1) when new 1368 * data has been written to a port's TxBuffer from higher layers 1369 * (2) when the peripheral sends us additional TxCredits indicating 1370 * that it can accept more Tx data for a given port; and (3) when 1371 * a bulk write completes successfully and we want to see if we 1372 * can transmit more. 1373 * 1374 ************************************************************************/ 1375 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) 1376 { 1377 struct TxFifo *fifo = &edge_port->txfifo; 1378 struct urb *urb; 1379 unsigned char *buffer; 1380 int status; 1381 int count; 1382 int bytesleft; 1383 int firsthalf; 1384 int secondhalf; 1385 unsigned long flags; 1386 1387 dbg("%s(%d)", __FUNCTION__, edge_port->port->number); 1388 1389 spin_lock_irqsave(&edge_port->ep_lock, flags); 1390 1391 if (edge_port->write_in_progress || 1392 !edge_port->open || 1393 (fifo->count == 0)) { 1394 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); 1395 goto exit_send; 1396 } 1397 1398 // since the amount of data in the fifo will always fit into the 1399 // edgeport buffer we do not need to check the write length 1400 1401 // Do we have enough credits for this port to make it worthwhile 1402 // to bother queueing a write. If it's too small, say a few bytes, 1403 // it's better to wait for more credits so we can do a larger 1404 // write. 1405 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1406 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); 1407 goto exit_send; 1408 } 1409 1410 // lock this write 1411 edge_port->write_in_progress = TRUE; 1412 1413 // get a pointer to the write_urb 1414 urb = edge_port->write_urb; 1415 1416 /* make sure transfer buffer is freed */ 1417 kfree(urb->transfer_buffer); 1418 urb->transfer_buffer = NULL; 1419 1420 /* build the data header for the buffer and port that we are about to send out */ 1421 count = fifo->count; 1422 buffer = kmalloc (count+2, GFP_ATOMIC); 1423 if (buffer == NULL) { 1424 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__); 1425 edge_port->write_in_progress = FALSE; 1426 goto exit_send; 1427 } 1428 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); 1429 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); 1430 1431 /* now copy our data */ 1432 bytesleft = fifo->size - fifo->tail; 1433 firsthalf = min (bytesleft, count); 1434 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1435 fifo->tail += firsthalf; 1436 fifo->count -= firsthalf; 1437 if (fifo->tail == fifo->size) { 1438 fifo->tail = 0; 1439 } 1440 1441 secondhalf = count-firsthalf; 1442 if (secondhalf) { 1443 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); 1444 fifo->tail += secondhalf; 1445 fifo->count -= secondhalf; 1446 } 1447 1448 if (count) 1449 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]); 1450 1451 /* fill up the urb with all of our data and submit it */ 1452 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 1453 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 1454 buffer, count+2, edge_bulk_out_data_callback, edge_port); 1455 1456 /* decrement the number of credits we have by the number we just sent */ 1457 edge_port->txCredits -= count; 1458 edge_port->icount.tx += count; 1459 1460 urb->dev = edge_serial->serial->dev; 1461 status = usb_submit_urb(urb, GFP_ATOMIC); 1462 if (status) { 1463 /* something went wrong */ 1464 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status); 1465 edge_port->write_in_progress = FALSE; 1466 1467 /* revert the credits as something bad happened. */ 1468 edge_port->txCredits += count; 1469 edge_port->icount.tx -= count; 1470 } 1471 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); 1472 1473 exit_send: 1474 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1475 } 1476 1477 1478 /***************************************************************************** 1479 * edge_write_room 1480 * this function is called by the tty driver when it wants to know how many 1481 * bytes of data we can accept for a specific port. 1482 * If successful, we return the amount of room that we have for this port 1483 * (the txCredits), 1484 * Otherwise we return a negative error number. 1485 *****************************************************************************/ 1486 static int edge_write_room (struct usb_serial_port *port) 1487 { 1488 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1489 int room; 1490 unsigned long flags; 1491 1492 dbg("%s", __FUNCTION__); 1493 1494 if (edge_port == NULL) 1495 return -ENODEV; 1496 if (edge_port->closePending == TRUE) 1497 return -ENODEV; 1498 1499 dbg("%s - port %d", __FUNCTION__, port->number); 1500 1501 if (!edge_port->open) { 1502 dbg("%s - port not opened", __FUNCTION__); 1503 return -EINVAL; 1504 } 1505 1506 // total of both buffers is still txCredit 1507 spin_lock_irqsave(&edge_port->ep_lock, flags); 1508 room = edge_port->txCredits - edge_port->txfifo.count; 1509 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1510 1511 dbg("%s - returns %d", __FUNCTION__, room); 1512 return room; 1513 } 1514 1515 1516 /***************************************************************************** 1517 * edge_chars_in_buffer 1518 * this function is called by the tty driver when it wants to know how many 1519 * bytes of data we currently have outstanding in the port (data that has 1520 * been written, but hasn't made it out the port yet) 1521 * If successful, we return the number of bytes left to be written in the 1522 * system, 1523 * Otherwise we return a negative error number. 1524 *****************************************************************************/ 1525 static int edge_chars_in_buffer (struct usb_serial_port *port) 1526 { 1527 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1528 int num_chars; 1529 unsigned long flags; 1530 1531 dbg("%s", __FUNCTION__); 1532 1533 if (edge_port == NULL) 1534 return -ENODEV; 1535 if (edge_port->closePending == TRUE) 1536 return -ENODEV; 1537 1538 if (!edge_port->open) { 1539 dbg("%s - port not opened", __FUNCTION__); 1540 return -EINVAL; 1541 } 1542 1543 spin_lock_irqsave(&edge_port->ep_lock, flags); 1544 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; 1545 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1546 if (num_chars) { 1547 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); 1548 } 1549 1550 return num_chars; 1551 } 1552 1553 1554 /***************************************************************************** 1555 * SerialThrottle 1556 * this function is called by the tty driver when it wants to stop the data 1557 * being read from the port. 1558 *****************************************************************************/ 1559 static void edge_throttle (struct usb_serial_port *port) 1560 { 1561 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1562 struct tty_struct *tty; 1563 int status; 1564 1565 dbg("%s - port %d", __FUNCTION__, port->number); 1566 1567 if (edge_port == NULL) 1568 return; 1569 1570 if (!edge_port->open) { 1571 dbg("%s - port not opened", __FUNCTION__); 1572 return; 1573 } 1574 1575 tty = port->tty; 1576 if (!tty) { 1577 dbg ("%s - no tty available", __FUNCTION__); 1578 return; 1579 } 1580 1581 /* if we are implementing XON/XOFF, send the stop character */ 1582 if (I_IXOFF(tty)) { 1583 unsigned char stop_char = STOP_CHAR(tty); 1584 status = edge_write (port, &stop_char, 1); 1585 if (status <= 0) { 1586 return; 1587 } 1588 } 1589 1590 /* if we are implementing RTS/CTS, toggle that line */ 1591 if (tty->termios->c_cflag & CRTSCTS) { 1592 edge_port->shadowMCR &= ~MCR_RTS; 1593 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1594 if (status != 0) { 1595 return; 1596 } 1597 } 1598 1599 return; 1600 } 1601 1602 1603 /***************************************************************************** 1604 * edge_unthrottle 1605 * this function is called by the tty driver when it wants to resume the data 1606 * being read from the port (called after SerialThrottle is called) 1607 *****************************************************************************/ 1608 static void edge_unthrottle (struct usb_serial_port *port) 1609 { 1610 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1611 struct tty_struct *tty; 1612 int status; 1613 1614 dbg("%s - port %d", __FUNCTION__, port->number); 1615 1616 if (edge_port == NULL) 1617 return; 1618 1619 if (!edge_port->open) { 1620 dbg("%s - port not opened", __FUNCTION__); 1621 return; 1622 } 1623 1624 tty = port->tty; 1625 if (!tty) { 1626 dbg ("%s - no tty available", __FUNCTION__); 1627 return; 1628 } 1629 1630 /* if we are implementing XON/XOFF, send the start character */ 1631 if (I_IXOFF(tty)) { 1632 unsigned char start_char = START_CHAR(tty); 1633 status = edge_write (port, &start_char, 1); 1634 if (status <= 0) { 1635 return; 1636 } 1637 } 1638 1639 /* if we are implementing RTS/CTS, toggle that line */ 1640 if (tty->termios->c_cflag & CRTSCTS) { 1641 edge_port->shadowMCR |= MCR_RTS; 1642 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1643 if (status != 0) { 1644 return; 1645 } 1646 } 1647 1648 return; 1649 } 1650 1651 1652 /***************************************************************************** 1653 * SerialSetTermios 1654 * this function is called by the tty driver when it wants to change the termios structure 1655 *****************************************************************************/ 1656 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios) 1657 { 1658 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1659 struct tty_struct *tty = port->tty; 1660 unsigned int cflag; 1661 1662 if (!port->tty || !port->tty->termios) { 1663 dbg ("%s - no tty or termios", __FUNCTION__); 1664 return; 1665 } 1666 1667 cflag = tty->termios->c_cflag; 1668 /* check that they really want us to change something */ 1669 if (old_termios) { 1670 if (cflag == old_termios->c_cflag && 1671 tty->termios->c_iflag == old_termios->c_iflag) { 1672 dbg("%s - nothing to change", __FUNCTION__); 1673 return; 1674 } 1675 } 1676 1677 dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 1678 tty->termios->c_cflag, tty->termios->c_iflag); 1679 if (old_termios) { 1680 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, 1681 old_termios->c_cflag, old_termios->c_iflag); 1682 } 1683 1684 dbg("%s - port %d", __FUNCTION__, port->number); 1685 1686 if (edge_port == NULL) 1687 return; 1688 1689 if (!edge_port->open) { 1690 dbg("%s - port not opened", __FUNCTION__); 1691 return; 1692 } 1693 1694 /* change the port settings to the new ones specified */ 1695 change_port_settings (edge_port, old_termios); 1696 1697 return; 1698 } 1699 1700 1701 /***************************************************************************** 1702 * get_lsr_info - get line status register info 1703 * 1704 * Purpose: Let user call ioctl() to get info when the UART physically 1705 * is emptied. On bus types like RS485, the transmitter must 1706 * release the bus after transmitting. This must be done when 1707 * the transmit shift register is empty, not be done when the 1708 * transmit holding register is empty. This functionality 1709 * allows an RS485 driver to be written in user space. 1710 *****************************************************************************/ 1711 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value) 1712 { 1713 unsigned int result = 0; 1714 unsigned long flags; 1715 1716 spin_lock_irqsave(&edge_port->ep_lock, flags); 1717 if (edge_port->maxTxCredits == edge_port->txCredits && 1718 edge_port->txfifo.count == 0) { 1719 dbg("%s -- Empty", __FUNCTION__); 1720 result = TIOCSER_TEMT; 1721 } 1722 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1723 1724 if (copy_to_user(value, &result, sizeof(int))) 1725 return -EFAULT; 1726 return 0; 1727 } 1728 1729 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value) 1730 { 1731 unsigned int result = 0; 1732 struct tty_struct *tty = edge_port->port->tty; 1733 1734 if (!tty) 1735 return -ENOIOCTLCMD; 1736 1737 result = tty->read_cnt; 1738 1739 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result); 1740 if (copy_to_user(value, &result, sizeof(int))) 1741 return -EFAULT; 1742 //return 0; 1743 return -ENOIOCTLCMD; 1744 } 1745 1746 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) 1747 { 1748 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1749 unsigned int mcr; 1750 1751 dbg("%s - port %d", __FUNCTION__, port->number); 1752 1753 mcr = edge_port->shadowMCR; 1754 if (set & TIOCM_RTS) 1755 mcr |= MCR_RTS; 1756 if (set & TIOCM_DTR) 1757 mcr |= MCR_DTR; 1758 if (set & TIOCM_LOOP) 1759 mcr |= MCR_LOOPBACK; 1760 1761 if (clear & TIOCM_RTS) 1762 mcr &= ~MCR_RTS; 1763 if (clear & TIOCM_DTR) 1764 mcr &= ~MCR_DTR; 1765 if (clear & TIOCM_LOOP) 1766 mcr &= ~MCR_LOOPBACK; 1767 1768 edge_port->shadowMCR = mcr; 1769 1770 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1771 1772 return 0; 1773 } 1774 1775 static int edge_tiocmget(struct usb_serial_port *port, struct file *file) 1776 { 1777 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1778 unsigned int result = 0; 1779 unsigned int msr; 1780 unsigned int mcr; 1781 1782 dbg("%s - port %d", __FUNCTION__, port->number); 1783 1784 msr = edge_port->shadowMSR; 1785 mcr = edge_port->shadowMCR; 1786 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1787 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1788 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1789 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1790 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1791 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1792 1793 1794 dbg("%s -- %x", __FUNCTION__, result); 1795 1796 return result; 1797 } 1798 1799 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo) 1800 { 1801 struct serial_struct tmp; 1802 1803 if (!retinfo) 1804 return -EFAULT; 1805 1806 memset(&tmp, 0, sizeof(tmp)); 1807 1808 tmp.type = PORT_16550A; 1809 tmp.line = edge_port->port->serial->minor; 1810 tmp.port = edge_port->port->number; 1811 tmp.irq = 0; 1812 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1813 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1814 tmp.baud_base = 9600; 1815 tmp.close_delay = 5*HZ; 1816 tmp.closing_wait = 30*HZ; 1817 // tmp.custom_divisor = state->custom_divisor; 1818 // tmp.hub6 = state->hub6; 1819 // tmp.io_type = state->io_type; 1820 1821 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1822 return -EFAULT; 1823 return 0; 1824 } 1825 1826 1827 1828 /***************************************************************************** 1829 * SerialIoctl 1830 * this function handles any ioctl calls to the driver 1831 *****************************************************************************/ 1832 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 1833 { 1834 DEFINE_WAIT(wait); 1835 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1836 struct async_icount cnow; 1837 struct async_icount cprev; 1838 struct serial_icounter_struct icount; 1839 1840 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); 1841 1842 switch (cmd) { 1843 // return number of bytes available 1844 case TIOCINQ: 1845 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); 1846 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg); 1847 break; 1848 1849 case TIOCSERGETLSR: 1850 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); 1851 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1852 return 0; 1853 1854 case TIOCGSERIAL: 1855 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); 1856 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1857 1858 case TIOCSSERIAL: 1859 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); 1860 break; 1861 1862 case TIOCMIWAIT: 1863 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 1864 cprev = edge_port->icount; 1865 while (1) { 1866 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE); 1867 schedule(); 1868 finish_wait(&edge_port->delta_msr_wait, &wait); 1869 /* see if a signal did it */ 1870 if (signal_pending(current)) 1871 return -ERESTARTSYS; 1872 cnow = edge_port->icount; 1873 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1874 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1875 return -EIO; /* no change => error */ 1876 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1877 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1878 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1879 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 1880 return 0; 1881 } 1882 cprev = cnow; 1883 } 1884 /* NOTREACHED */ 1885 break; 1886 1887 case TIOCGICOUNT: 1888 cnow = edge_port->icount; 1889 memset(&icount, 0, sizeof(icount)); 1890 icount.cts = cnow.cts; 1891 icount.dsr = cnow.dsr; 1892 icount.rng = cnow.rng; 1893 icount.dcd = cnow.dcd; 1894 icount.rx = cnow.rx; 1895 icount.tx = cnow.tx; 1896 icount.frame = cnow.frame; 1897 icount.overrun = cnow.overrun; 1898 icount.parity = cnow.parity; 1899 icount.brk = cnow.brk; 1900 icount.buf_overrun = cnow.buf_overrun; 1901 1902 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx ); 1903 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1904 return -EFAULT; 1905 return 0; 1906 } 1907 1908 return -ENOIOCTLCMD; 1909 } 1910 1911 1912 /***************************************************************************** 1913 * SerialBreak 1914 * this function sends a break to the port 1915 *****************************************************************************/ 1916 static void edge_break (struct usb_serial_port *port, int break_state) 1917 { 1918 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1919 int status; 1920 1921 /* flush and chase */ 1922 edge_port->chaseResponsePending = TRUE; 1923 1924 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1925 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1926 if (status == 0) { 1927 // block until chase finished 1928 block_until_chase_response(edge_port); 1929 } else { 1930 edge_port->chaseResponsePending = FALSE; 1931 } 1932 1933 if (break_state == -1) { 1934 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__); 1935 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0); 1936 } else { 1937 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__); 1938 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0); 1939 } 1940 if (status) { 1941 dbg("%s - error sending break set/clear command.", __FUNCTION__); 1942 } 1943 1944 return; 1945 } 1946 1947 1948 /***************************************************************************** 1949 * process_rcvd_data 1950 * this function handles the data received on the bulk in pipe. 1951 *****************************************************************************/ 1952 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength) 1953 { 1954 struct usb_serial_port *port; 1955 struct edgeport_port *edge_port; 1956 struct tty_struct *tty; 1957 __u16 lastBufferLength; 1958 __u16 rxLen; 1959 1960 dbg("%s", __FUNCTION__); 1961 1962 lastBufferLength = bufferLength + 1; 1963 1964 while (bufferLength > 0) { 1965 /* failsafe incase we get a message that we don't understand */ 1966 if (lastBufferLength == bufferLength) { 1967 dbg("%s - stuck in loop, exiting it.", __FUNCTION__); 1968 break; 1969 } 1970 lastBufferLength = bufferLength; 1971 1972 switch (edge_serial->rxState) { 1973 case EXPECT_HDR1: 1974 edge_serial->rxHeader1 = *buffer; 1975 ++buffer; 1976 --bufferLength; 1977 1978 if (bufferLength == 0) { 1979 edge_serial->rxState = EXPECT_HDR2; 1980 break; 1981 } 1982 /* otherwise, drop on through */ 1983 1984 case EXPECT_HDR2: 1985 edge_serial->rxHeader2 = *buffer; 1986 ++buffer; 1987 --bufferLength; 1988 1989 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2); 1990 1991 // Process depending on whether this header is 1992 // data or status 1993 1994 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1995 // Decode this status header and goto EXPECT_HDR1 (if we 1996 // can process the status with only 2 bytes), or goto 1997 // EXPECT_HDR3 to get the third byte. 1998 1999 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 2000 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1); 2001 2002 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) { 2003 // This status needs additional bytes. Save what we have 2004 // and then wait for more data. 2005 edge_serial->rxStatusParam = edge_serial->rxHeader2; 2006 2007 edge_serial->rxState = EXPECT_HDR3; 2008 break; 2009 } 2010 2011 // We have all the header bytes, process the status now 2012 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0); 2013 edge_serial->rxState = EXPECT_HDR1; 2014 break; 2015 } else { 2016 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 2017 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2); 2018 2019 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining); 2020 2021 //ASSERT( DevExt->RxPort < DevExt->NumPorts ); 2022 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH ); 2023 2024 if (bufferLength == 0 ) { 2025 edge_serial->rxState = EXPECT_DATA; 2026 break; 2027 } 2028 // Else, drop through 2029 } 2030 2031 case EXPECT_DATA: // Expect data 2032 2033 if (bufferLength < edge_serial->rxBytesRemaining) { 2034 rxLen = bufferLength; 2035 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer 2036 } else { 2037 // BufLen >= RxBytesRemaining 2038 rxLen = edge_serial->rxBytesRemaining; 2039 edge_serial->rxState = EXPECT_HDR1; // Start another header next time 2040 } 2041 2042 bufferLength -= rxLen; 2043 edge_serial->rxBytesRemaining -= rxLen; 2044 2045 /* spit this data back into the tty driver if this port is open */ 2046 if (rxLen) { 2047 port = edge_serial->serial->port[edge_serial->rxPort]; 2048 edge_port = usb_get_serial_port_data(port); 2049 if (edge_port->open) { 2050 tty = edge_port->port->tty; 2051 if (tty) { 2052 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort); 2053 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 2054 } 2055 edge_port->icount.rx += rxLen; 2056 } 2057 buffer += rxLen; 2058 } 2059 2060 break; 2061 2062 case EXPECT_HDR3: // Expect 3rd byte of status header 2063 edge_serial->rxHeader3 = *buffer; 2064 ++buffer; 2065 --bufferLength; 2066 2067 // We have all the header bytes, process the status now 2068 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3); 2069 edge_serial->rxState = EXPECT_HDR1; 2070 break; 2071 2072 } 2073 } 2074 } 2075 2076 2077 /***************************************************************************** 2078 * process_rcvd_status 2079 * this function handles the any status messages received on the bulk in pipe. 2080 *****************************************************************************/ 2081 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3) 2082 { 2083 struct usb_serial_port *port; 2084 struct edgeport_port *edge_port; 2085 __u8 code = edge_serial->rxStatusCode; 2086 2087 /* switch the port pointer to the one being currently talked about */ 2088 port = edge_serial->serial->port[edge_serial->rxPort]; 2089 edge_port = usb_get_serial_port_data(port); 2090 if (edge_port == NULL) { 2091 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort); 2092 return; 2093 } 2094 2095 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort); 2096 2097 if (code == IOSP_EXT_STATUS) { 2098 switch (byte2) { 2099 case IOSP_EXT_STATUS_CHASE_RSP: 2100 // we want to do EXT status regardless of port open/closed 2101 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 ); 2102 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call 2103 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do. 2104 // Also, we currently clear flag and close the port regardless of content of above's Byte3. 2105 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport, 2106 // like wait longer in block_until_chase_response, but for now we don't. 2107 edge_port->chaseResponsePending = FALSE; 2108 wake_up (&edge_port->wait_chase); 2109 return; 2110 2111 case IOSP_EXT_STATUS_RX_CHECK_RSP: 2112 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 ); 2113 //Port->RxCheckRsp = TRUE; 2114 return; 2115 } 2116 } 2117 2118 if (code == IOSP_STATUS_OPEN_RSP) { 2119 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 2120 edge_port->maxTxCredits = edge_port->txCredits; 2121 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits); 2122 handle_new_msr (edge_port, byte2); 2123 2124 /* send the current line settings to the port so we are in sync with any further termios calls */ 2125 if (edge_port->port->tty) 2126 change_port_settings (edge_port, edge_port->port->tty->termios); 2127 2128 /* we have completed the open */ 2129 edge_port->openPending = FALSE; 2130 edge_port->open = TRUE; 2131 wake_up(&edge_port->wait_open); 2132 return; 2133 } 2134 2135 // If port is closed, silently discard all rcvd status. We can 2136 // have cases where buffered status is received AFTER the close 2137 // port command is sent to the Edgeport. 2138 if ((!edge_port->open ) || (edge_port->closePending)) { 2139 return; 2140 } 2141 2142 switch (code) { 2143 // Not currently sent by Edgeport 2144 case IOSP_STATUS_LSR: 2145 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2146 handle_new_lsr (edge_port, FALSE, byte2, 0); 2147 break; 2148 2149 case IOSP_STATUS_LSR_DATA: 2150 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2151 // byte2 is LSR Register 2152 // byte3 is broken data byte 2153 handle_new_lsr (edge_port, TRUE, byte2, byte3); 2154 break; 2155 // 2156 // case IOSP_EXT_4_STATUS: 2157 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2158 // break; 2159 // 2160 case IOSP_STATUS_MSR: 2161 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2162 2163 // Process this new modem status and generate appropriate 2164 // events, etc, based on the new status. This routine 2165 // also saves the MSR in Port->ShadowMsr. 2166 handle_new_msr(edge_port, byte2); 2167 break; 2168 2169 default: 2170 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code); 2171 break; 2172 } 2173 2174 return; 2175 } 2176 2177 2178 /***************************************************************************** 2179 * edge_tty_recv 2180 * this function passes data on to the tty flip buffer 2181 *****************************************************************************/ 2182 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length) 2183 { 2184 int cnt; 2185 2186 do { 2187 if (tty->flip.count >= TTY_FLIPBUF_SIZE) { 2188 tty_flip_buffer_push(tty); 2189 if (tty->flip.count >= TTY_FLIPBUF_SIZE) { 2190 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2191 __FUNCTION__, length); 2192 return; 2193 } 2194 } 2195 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count); 2196 memcpy(tty->flip.char_buf_ptr, data, cnt); 2197 memset(tty->flip.flag_buf_ptr, 0, cnt); 2198 tty->flip.char_buf_ptr += cnt; 2199 tty->flip.flag_buf_ptr += cnt; 2200 tty->flip.count += cnt; 2201 data += cnt; 2202 length -= cnt; 2203 } while (length > 0); 2204 2205 tty_flip_buffer_push(tty); 2206 } 2207 2208 2209 /***************************************************************************** 2210 * handle_new_msr 2211 * this function handles any change to the msr register for a port. 2212 *****************************************************************************/ 2213 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2214 { 2215 struct async_icount *icount; 2216 2217 dbg("%s %02x", __FUNCTION__, newMsr); 2218 2219 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2220 icount = &edge_port->icount; 2221 2222 /* update input line counters */ 2223 if (newMsr & EDGEPORT_MSR_DELTA_CTS) { 2224 icount->cts++; 2225 } 2226 if (newMsr & EDGEPORT_MSR_DELTA_DSR) { 2227 icount->dsr++; 2228 } 2229 if (newMsr & EDGEPORT_MSR_DELTA_CD) { 2230 icount->dcd++; 2231 } 2232 if (newMsr & EDGEPORT_MSR_DELTA_RI) { 2233 icount->rng++; 2234 } 2235 wake_up_interruptible(&edge_port->delta_msr_wait); 2236 } 2237 2238 /* Save the new modem status */ 2239 edge_port->shadowMSR = newMsr & 0xf0; 2240 2241 return; 2242 } 2243 2244 2245 /***************************************************************************** 2246 * handle_new_lsr 2247 * this function handles any change to the lsr register for a port. 2248 *****************************************************************************/ 2249 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data) 2250 { 2251 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2252 struct async_icount *icount; 2253 2254 dbg("%s - %02x", __FUNCTION__, newLsr); 2255 2256 edge_port->shadowLSR = lsr; 2257 2258 if (newLsr & LSR_BREAK) { 2259 // 2260 // Parity and Framing errors only count if they 2261 // occur exclusive of a break being 2262 // received. 2263 // 2264 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2265 } 2266 2267 /* Place LSR data byte into Rx buffer */ 2268 if (lsrData && edge_port->port->tty) 2269 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1); 2270 2271 /* update input line counters */ 2272 icount = &edge_port->icount; 2273 if (newLsr & LSR_BREAK) { 2274 icount->brk++; 2275 } 2276 if (newLsr & LSR_OVER_ERR) { 2277 icount->overrun++; 2278 } 2279 if (newLsr & LSR_PAR_ERR) { 2280 icount->parity++; 2281 } 2282 if (newLsr & LSR_FRM_ERR) { 2283 icount->frame++; 2284 } 2285 2286 return; 2287 } 2288 2289 2290 /**************************************************************************** 2291 * sram_write 2292 * writes a number of bytes to the Edgeport device's sram starting at the 2293 * given address. 2294 * If successful returns the number of bytes written, otherwise it returns 2295 * a negative error number of the problem. 2296 ****************************************************************************/ 2297 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2298 { 2299 int result; 2300 __u16 current_length; 2301 unsigned char *transfer_buffer; 2302 2303 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2304 2305 transfer_buffer = kmalloc (64, GFP_KERNEL); 2306 if (!transfer_buffer) { 2307 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2308 return -ENOMEM; 2309 } 2310 2311 /* need to split these writes up into 64 byte chunks */ 2312 result = 0; 2313 while (length > 0) { 2314 if (length > 64) { 2315 current_length = 64; 2316 } else { 2317 current_length = length; 2318 } 2319 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2320 memcpy (transfer_buffer, data, current_length); 2321 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM, 2322 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2323 if (result < 0) 2324 break; 2325 length -= current_length; 2326 addr += current_length; 2327 data += current_length; 2328 } 2329 2330 kfree (transfer_buffer); 2331 return result; 2332 } 2333 2334 2335 /**************************************************************************** 2336 * rom_write 2337 * writes a number of bytes to the Edgeport device's ROM starting at the 2338 * given address. 2339 * If successful returns the number of bytes written, otherwise it returns 2340 * a negative error number of the problem. 2341 ****************************************************************************/ 2342 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2343 { 2344 int result; 2345 __u16 current_length; 2346 unsigned char *transfer_buffer; 2347 2348 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2349 2350 transfer_buffer = kmalloc (64, GFP_KERNEL); 2351 if (!transfer_buffer) { 2352 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2353 return -ENOMEM; 2354 } 2355 2356 /* need to split these writes up into 64 byte chunks */ 2357 result = 0; 2358 while (length > 0) { 2359 if (length > 64) { 2360 current_length = 64; 2361 } else { 2362 current_length = length; 2363 } 2364 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2365 memcpy (transfer_buffer, data, current_length); 2366 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM, 2367 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2368 if (result < 0) 2369 break; 2370 length -= current_length; 2371 addr += current_length; 2372 data += current_length; 2373 } 2374 2375 kfree (transfer_buffer); 2376 return result; 2377 } 2378 2379 2380 /**************************************************************************** 2381 * rom_read 2382 * reads a number of bytes from the Edgeport device starting at the given 2383 * address. 2384 * If successful returns the number of bytes read, otherwise it returns 2385 * a negative error number of the problem. 2386 ****************************************************************************/ 2387 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2388 { 2389 int result; 2390 __u16 current_length; 2391 unsigned char *transfer_buffer; 2392 2393 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2394 2395 transfer_buffer = kmalloc (64, GFP_KERNEL); 2396 if (!transfer_buffer) { 2397 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2398 return -ENOMEM; 2399 } 2400 2401 /* need to split these reads up into 64 byte chunks */ 2402 result = 0; 2403 while (length > 0) { 2404 if (length > 64) { 2405 current_length = 64; 2406 } else { 2407 current_length = length; 2408 } 2409 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2410 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM, 2411 0xC0, addr, extAddr, transfer_buffer, current_length, 300); 2412 if (result < 0) 2413 break; 2414 memcpy (data, transfer_buffer, current_length); 2415 length -= current_length; 2416 addr += current_length; 2417 data += current_length; 2418 } 2419 2420 kfree (transfer_buffer); 2421 return result; 2422 } 2423 2424 2425 /**************************************************************************** 2426 * send_iosp_ext_cmd 2427 * Is used to send a IOSP message to the Edgeport device 2428 ****************************************************************************/ 2429 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param) 2430 { 2431 unsigned char *buffer; 2432 unsigned char *currentCommand; 2433 int length = 0; 2434 int status = 0; 2435 2436 dbg("%s - %d, %d", __FUNCTION__, command, param); 2437 2438 buffer = kmalloc (10, GFP_ATOMIC); 2439 if (!buffer) { 2440 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10); 2441 return -ENOMEM; 2442 } 2443 2444 currentCommand = buffer; 2445 2446 MAKE_CMD_EXT_CMD (¤tCommand, &length, 2447 edge_port->port->number - edge_port->port->serial->minor, 2448 command, param); 2449 2450 status = write_cmd_usb (edge_port, buffer, length); 2451 if (status) { 2452 /* something bad happened, let's free up the memory */ 2453 kfree(buffer); 2454 } 2455 2456 return status; 2457 } 2458 2459 2460 /***************************************************************************** 2461 * write_cmd_usb 2462 * this function writes the given buffer out to the bulk write endpoint. 2463 *****************************************************************************/ 2464 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length) 2465 { 2466 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2467 int status = 0; 2468 struct urb *urb; 2469 int timeout; 2470 2471 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer); 2472 2473 /* Allocate our next urb */ 2474 urb = usb_alloc_urb (0, GFP_ATOMIC); 2475 if (!urb) 2476 return -ENOMEM; 2477 2478 CmdUrbs++; 2479 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 2480 2481 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 2482 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 2483 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2484 2485 edge_port->commandPending = TRUE; 2486 status = usb_submit_urb(urb, GFP_ATOMIC); 2487 2488 if (status) { 2489 /* something went wrong */ 2490 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status); 2491 usb_kill_urb(urb); 2492 usb_free_urb(urb); 2493 CmdUrbs--; 2494 return status; 2495 } 2496 2497 // wait for command to finish 2498 timeout = COMMAND_TIMEOUT; 2499 #if 0 2500 wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE)); 2501 2502 if (edge_port->commandPending == TRUE) { 2503 /* command timed out */ 2504 dbg("%s - command timed out", __FUNCTION__); 2505 status = -EINVAL; 2506 } 2507 #endif 2508 return status; 2509 } 2510 2511 2512 /***************************************************************************** 2513 * send_cmd_write_baud_rate 2514 * this function sends the proper command to change the baud rate of the 2515 * specified port. 2516 *****************************************************************************/ 2517 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate) 2518 { 2519 unsigned char *cmdBuffer; 2520 unsigned char *currCmd; 2521 int cmdLen = 0; 2522 int divisor; 2523 int status; 2524 unsigned char number = edge_port->port->number - edge_port->port->serial->minor; 2525 2526 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); 2527 2528 status = calc_baud_rate_divisor (baudRate, &divisor); 2529 if (status) { 2530 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__); 2531 return status; 2532 } 2533 2534 // Alloc memory for the string of commands. 2535 cmdBuffer = kmalloc (0x100, GFP_ATOMIC); 2536 if (!cmdBuffer) { 2537 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); 2538 return -ENOMEM; 2539 } 2540 currCmd = cmdBuffer; 2541 2542 // Enable access to divisor latch 2543 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); 2544 2545 // Write the divisor itself 2546 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); 2547 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); 2548 2549 // Restore original value to disable access to divisor latch 2550 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); 2551 2552 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); 2553 if (status) { 2554 /* something bad happened, let's free up the memory */ 2555 kfree (cmdBuffer); 2556 } 2557 2558 return status; 2559 } 2560 2561 2562 /***************************************************************************** 2563 * calc_baud_rate_divisor 2564 * this function calculates the proper baud rate divisor for the specified 2565 * baud rate. 2566 *****************************************************************************/ 2567 static int calc_baud_rate_divisor (int baudrate, int *divisor) 2568 { 2569 int i; 2570 __u16 custom; 2571 2572 2573 dbg("%s - %d", __FUNCTION__, baudrate); 2574 2575 for (i = 0; i < NUM_ENTRIES(divisor_table); i++) { 2576 if ( divisor_table[i].BaudRate == baudrate ) { 2577 *divisor = divisor_table[i].Divisor; 2578 return 0; 2579 } 2580 } 2581 2582 // We have tried all of the standard baud rates 2583 // lets try to calculate the divisor for this baud rate 2584 // Make sure the baud rate is reasonable 2585 if (baudrate > 50 && baudrate < 230400) { 2586 // get divisor 2587 custom = (__u16)((230400L + baudrate/2) / baudrate); 2588 2589 *divisor = custom; 2590 2591 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); 2592 return 0; 2593 } 2594 2595 return -1; 2596 } 2597 2598 2599 /***************************************************************************** 2600 * send_cmd_write_uart_register 2601 * this function builds up a uart register message and sends to to the device. 2602 *****************************************************************************/ 2603 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) 2604 { 2605 unsigned char *cmdBuffer; 2606 unsigned char *currCmd; 2607 unsigned long cmdLen = 0; 2608 int status; 2609 2610 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); 2611 2612 // Alloc memory for the string of commands. 2613 cmdBuffer = kmalloc (0x10, GFP_ATOMIC); 2614 if (cmdBuffer == NULL ) { 2615 return -ENOMEM; 2616 } 2617 2618 currCmd = cmdBuffer; 2619 2620 // Build a cmd in the buffer to write the given register 2621 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, 2622 edge_port->port->number - edge_port->port->serial->minor, 2623 regNum, regValue); 2624 2625 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2626 if (status) { 2627 /* something bad happened, let's free up the memory */ 2628 kfree (cmdBuffer); 2629 } 2630 2631 return status; 2632 } 2633 2634 2635 /***************************************************************************** 2636 * change_port_settings 2637 * This routine is called to set the UART on the device to match the specified 2638 * new settings. 2639 *****************************************************************************/ 2640 #ifndef CMSPAR 2641 #define CMSPAR 0 2642 #endif 2643 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios) 2644 { 2645 struct tty_struct *tty; 2646 int baud; 2647 unsigned cflag; 2648 __u8 mask = 0xff; 2649 __u8 lData; 2650 __u8 lParity; 2651 __u8 lStop; 2652 __u8 rxFlow; 2653 __u8 txFlow; 2654 int status; 2655 2656 dbg("%s - port %d", __FUNCTION__, edge_port->port->number); 2657 2658 if ((!edge_port->open) && 2659 (!edge_port->openPending)) { 2660 dbg("%s - port not opened", __FUNCTION__); 2661 return; 2662 } 2663 2664 tty = edge_port->port->tty; 2665 if ((!tty) || 2666 (!tty->termios)) { 2667 dbg("%s - no tty structures", __FUNCTION__); 2668 return; 2669 } 2670 2671 cflag = tty->termios->c_cflag; 2672 2673 switch (cflag & CSIZE) { 2674 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; 2675 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; 2676 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; 2677 default: 2678 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; 2679 } 2680 2681 lParity = LCR_PAR_NONE; 2682 if (cflag & PARENB) { 2683 if (cflag & CMSPAR) { 2684 if (cflag & PARODD) { 2685 lParity = LCR_PAR_MARK; 2686 dbg("%s - parity = mark", __FUNCTION__); 2687 } else { 2688 lParity = LCR_PAR_SPACE; 2689 dbg("%s - parity = space", __FUNCTION__); 2690 } 2691 } else if (cflag & PARODD) { 2692 lParity = LCR_PAR_ODD; 2693 dbg("%s - parity = odd", __FUNCTION__); 2694 } else { 2695 lParity = LCR_PAR_EVEN; 2696 dbg("%s - parity = even", __FUNCTION__); 2697 } 2698 } else { 2699 dbg("%s - parity = none", __FUNCTION__); 2700 } 2701 2702 if (cflag & CSTOPB) { 2703 lStop = LCR_STOP_2; 2704 dbg("%s - stop bits = 2", __FUNCTION__); 2705 } else { 2706 lStop = LCR_STOP_1; 2707 dbg("%s - stop bits = 1", __FUNCTION__); 2708 } 2709 2710 /* figure out the flow control settings */ 2711 rxFlow = txFlow = 0x00; 2712 if (cflag & CRTSCTS) { 2713 rxFlow |= IOSP_RX_FLOW_RTS; 2714 txFlow |= IOSP_TX_FLOW_CTS; 2715 dbg("%s - RTS/CTS is enabled", __FUNCTION__); 2716 } else { 2717 dbg("%s - RTS/CTS is disabled", __FUNCTION__); 2718 } 2719 2720 /* if we are implementing XON/XOFF, set the start and stop character in the device */ 2721 if (I_IXOFF(tty) || I_IXON(tty)) { 2722 unsigned char stop_char = STOP_CHAR(tty); 2723 unsigned char start_char = START_CHAR(tty); 2724 2725 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char); 2726 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); 2727 2728 /* if we are implementing INBOUND XON/XOFF */ 2729 if (I_IXOFF(tty)) { 2730 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2731 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2732 } else { 2733 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); 2734 } 2735 2736 /* if we are implementing OUTBOUND XON/XOFF */ 2737 if (I_IXON(tty)) { 2738 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2739 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2740 } else { 2741 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); 2742 } 2743 } 2744 2745 /* Set flow control to the configured value */ 2746 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2747 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2748 2749 2750 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2751 edge_port->shadowLCR |= (lData | lParity | lStop); 2752 2753 edge_port->validDataMask = mask; 2754 2755 /* Send the updated LCR value to the EdgePort */ 2756 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); 2757 if (status != 0) { 2758 return; 2759 } 2760 2761 /* set up the MCR register and send it to the EdgePort */ 2762 edge_port->shadowMCR = MCR_MASTER_IE; 2763 if (cflag & CBAUD) { 2764 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2765 } 2766 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 2767 if (status != 0) { 2768 return; 2769 } 2770 2771 /* Determine divisor based on baud rate */ 2772 baud = tty_get_baud_rate(tty); 2773 if (!baud) { 2774 /* pick a default, any default... */ 2775 baud = 9600; 2776 } 2777 2778 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2779 status = send_cmd_write_baud_rate (edge_port, baud); 2780 2781 return; 2782 } 2783 2784 2785 /**************************************************************************** 2786 * unicode_to_ascii 2787 * Turns a string from Unicode into ASCII. 2788 * Doesn't do a good job with any characters that are outside the normal 2789 * ASCII range, but it's only for debugging... 2790 * NOTE: expects the unicode in LE format 2791 ****************************************************************************/ 2792 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size) 2793 { 2794 int i; 2795 2796 if (unicode_size <= 0) 2797 return; 2798 2799 for (i = 0; i < unicode_size; ++i) 2800 string[i] = (char)(le16_to_cpu(unicode[i])); 2801 string[unicode_size] = 0x00; 2802 } 2803 2804 2805 /**************************************************************************** 2806 * get_manufacturing_desc 2807 * reads in the manufacturing descriptor and stores it into the serial 2808 * structure. 2809 ****************************************************************************/ 2810 static void get_manufacturing_desc (struct edgeport_serial *edge_serial) 2811 { 2812 int response; 2813 2814 dbg("getting manufacturer descriptor"); 2815 2816 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2817 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, 2818 (__u8 *)(&edge_serial->manuf_descriptor)); 2819 2820 if (response < 1) { 2821 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n"); 2822 } else { 2823 char string[30]; 2824 dbg("**Manufacturer Descriptor"); 2825 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); 2826 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); 2827 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); 2828 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); 2829 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); 2830 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); 2831 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1); 2832 dbg(" SerialNumber: %s", string); 2833 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1); 2834 dbg(" AssemblyNumber: %s", string); 2835 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1); 2836 dbg(" OemAssyNumber: %s", string); 2837 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); 2838 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); 2839 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); 2840 } 2841 } 2842 2843 2844 /**************************************************************************** 2845 * get_boot_desc 2846 * reads in the bootloader descriptor and stores it into the serial 2847 * structure. 2848 ****************************************************************************/ 2849 static void get_boot_desc (struct edgeport_serial *edge_serial) 2850 { 2851 int response; 2852 2853 dbg("getting boot descriptor"); 2854 2855 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2856 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, 2857 (__u8 *)(&edge_serial->boot_descriptor)); 2858 2859 if (response < 1) { 2860 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n"); 2861 } else { 2862 dbg("**Boot Descriptor:"); 2863 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2864 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); 2865 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); 2866 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2867 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2868 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); 2869 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); 2870 } 2871 } 2872 2873 2874 /**************************************************************************** 2875 * load_application_firmware 2876 * This is called to load the application firmware to the device 2877 ****************************************************************************/ 2878 static void load_application_firmware (struct edgeport_serial *edge_serial) 2879 { 2880 struct edge_firmware_image_record *record; 2881 unsigned char *firmware; 2882 unsigned char *FirmwareImage; 2883 int ImageSize; 2884 int response; 2885 2886 2887 switch (edge_serial->product_info.iDownloadFile) { 2888 case EDGE_DOWNLOAD_FILE_I930: 2889 dbg("downloading firmware version (930) %d.%d.%d", 2890 OperationalCodeImageVersion_GEN1.MajorVersion, 2891 OperationalCodeImageVersion_GEN1.MinorVersion, 2892 OperationalCodeImageVersion_GEN1.BuildNumber); 2893 firmware = &OperationalCodeImage_GEN1[0]; 2894 FirmwareImage = &OperationalCodeImage_GEN1[0]; 2895 ImageSize = sizeof(OperationalCodeImage_GEN1); 2896 break; 2897 2898 case EDGE_DOWNLOAD_FILE_80251: 2899 dbg("downloading firmware version (80251) %d.%d.%d", 2900 OperationalCodeImageVersion_GEN2.MajorVersion, 2901 OperationalCodeImageVersion_GEN2.MinorVersion, 2902 OperationalCodeImageVersion_GEN2.BuildNumber); 2903 firmware = &OperationalCodeImage_GEN2[0]; 2904 FirmwareImage = &OperationalCodeImage_GEN2[0]; 2905 ImageSize = sizeof(OperationalCodeImage_GEN2); 2906 break; 2907 2908 case EDGE_DOWNLOAD_FILE_NONE: 2909 dbg ("No download file specified, skipping download\n"); 2910 return; 2911 2912 default: 2913 return; 2914 } 2915 2916 2917 for (;;) { 2918 record = (struct edge_firmware_image_record *)firmware; 2919 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 2920 if (response < 0) { 2921 dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 2922 break; 2923 } 2924 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 2925 if (firmware >= &FirmwareImage[ImageSize]) { 2926 break; 2927 } 2928 } 2929 2930 dbg("sending exec_dl_code"); 2931 response = usb_control_msg (edge_serial->serial->dev, 2932 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2933 USB_REQUEST_ION_EXEC_DL_CODE, 2934 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2935 2936 return; 2937 } 2938 2939 2940 /**************************************************************************** 2941 * edge_startup 2942 ****************************************************************************/ 2943 static int edge_startup (struct usb_serial *serial) 2944 { 2945 struct edgeport_serial *edge_serial; 2946 struct edgeport_port *edge_port; 2947 struct usb_device *dev; 2948 int i; 2949 2950 dev = serial->dev; 2951 2952 /* create our private serial structure */ 2953 edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL); 2954 if (edge_serial == NULL) { 2955 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2956 return -ENOMEM; 2957 } 2958 memset (edge_serial, 0, sizeof(struct edgeport_serial)); 2959 spin_lock_init(&edge_serial->es_lock); 2960 edge_serial->serial = serial; 2961 usb_set_serial_data(serial, edge_serial); 2962 2963 /* get the name for the device from the device */ 2964 if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) { 2965 edge_serial->name[i-1] = ' '; 2966 } 2967 2968 get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]); 2969 2970 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2971 2972 /* get the manufacturing descriptor for this device */ 2973 get_manufacturing_desc (edge_serial); 2974 2975 /* get the boot descriptor */ 2976 get_boot_desc (edge_serial); 2977 2978 get_product_info(edge_serial); 2979 2980 /* set the number of ports from the manufacturing description */ 2981 /* serial->num_ports = serial->product_info.NumPorts; */ 2982 if (edge_serial->product_info.NumPorts != serial->num_ports) { 2983 warn("%s - Device Reported %d serial ports vs core " 2984 "thinking we have %d ports, email greg@kroah.com this info.", 2985 __FUNCTION__, edge_serial->product_info.NumPorts, 2986 serial->num_ports); 2987 } 2988 2989 dbg("%s - time 1 %ld", __FUNCTION__, jiffies); 2990 2991 /* now load the application firmware into this device */ 2992 load_application_firmware (edge_serial); 2993 2994 dbg("%s - time 2 %ld", __FUNCTION__, jiffies); 2995 2996 /* Check current Edgeport EEPROM and update if necessary */ 2997 update_edgeport_E2PROM (edge_serial); 2998 2999 dbg("%s - time 3 %ld", __FUNCTION__, jiffies); 3000 3001 /* set the configuration to use #1 */ 3002 // dbg("set_configuration 1"); 3003 // usb_set_configuration (dev, 1); 3004 3005 /* we set up the pointers to the endpoints in the edge_open function, 3006 * as the structures aren't created yet. */ 3007 3008 /* set up our port private structures */ 3009 for (i = 0; i < serial->num_ports; ++i) { 3010 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); 3011 if (edge_port == NULL) { 3012 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 3013 usb_set_serial_data(serial, NULL); 3014 kfree(edge_serial); 3015 return -ENOMEM; 3016 } 3017 memset (edge_port, 0, sizeof(struct edgeport_port)); 3018 spin_lock_init(&edge_port->ep_lock); 3019 edge_port->port = serial->port[i]; 3020 usb_set_serial_port_data(serial->port[i], edge_port); 3021 } 3022 3023 return 0; 3024 } 3025 3026 3027 /**************************************************************************** 3028 * edge_shutdown 3029 * This function is called whenever the device is removed from the usb bus. 3030 ****************************************************************************/ 3031 static void edge_shutdown (struct usb_serial *serial) 3032 { 3033 int i; 3034 3035 dbg("%s", __FUNCTION__); 3036 3037 /* stop reads and writes on all ports */ 3038 for (i=0; i < serial->num_ports; ++i) { 3039 kfree (usb_get_serial_port_data(serial->port[i])); 3040 usb_set_serial_port_data(serial->port[i], NULL); 3041 } 3042 kfree (usb_get_serial_data(serial)); 3043 usb_set_serial_data(serial, NULL); 3044 } 3045 3046 3047 /**************************************************************************** 3048 * edgeport_init 3049 * This is called by the module subsystem, or on startup to initialize us 3050 ****************************************************************************/ 3051 static int __init edgeport_init(void) 3052 { 3053 int retval; 3054 3055 retval = usb_serial_register(&edgeport_2port_device); 3056 if (retval) 3057 goto failed_2port_device_register; 3058 retval = usb_serial_register(&edgeport_4port_device); 3059 if (retval) 3060 goto failed_4port_device_register; 3061 retval = usb_serial_register(&edgeport_8port_device); 3062 if (retval) 3063 goto failed_8port_device_register; 3064 retval = usb_register(&io_driver); 3065 if (retval) 3066 goto failed_usb_register; 3067 info(DRIVER_DESC " " DRIVER_VERSION); 3068 return 0; 3069 3070 failed_usb_register: 3071 usb_serial_deregister(&edgeport_8port_device); 3072 failed_8port_device_register: 3073 usb_serial_deregister(&edgeport_4port_device); 3074 failed_4port_device_register: 3075 usb_serial_deregister(&edgeport_2port_device); 3076 failed_2port_device_register: 3077 return retval; 3078 } 3079 3080 3081 /**************************************************************************** 3082 * edgeport_exit 3083 * Called when the driver is about to be unloaded. 3084 ****************************************************************************/ 3085 static void __exit edgeport_exit (void) 3086 { 3087 usb_deregister (&io_driver); 3088 usb_serial_deregister (&edgeport_2port_device); 3089 usb_serial_deregister (&edgeport_4port_device); 3090 usb_serial_deregister (&edgeport_8port_device); 3091 } 3092 3093 module_init(edgeport_init); 3094 module_exit(edgeport_exit); 3095 3096 /* Module information */ 3097 MODULE_AUTHOR( DRIVER_AUTHOR ); 3098 MODULE_DESCRIPTION( DRIVER_DESC ); 3099 MODULE_LICENSE("GPL"); 3100 3101 module_param(debug, bool, S_IRUGO | S_IWUSR); 3102 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3103 3104 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 3105 MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 3106