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 * Version history: 27 * 28 * 2003_04_03 al borchers 29 * - fixed a bug (that shows up with dosemu) where the tty struct is 30 * used in a callback after it has been freed 31 * 32 * 2.3 2002_03_08 greg kroah-hartman 33 * - fixed bug when multiple devices were attached at the same time. 34 * 35 * 2.2 2001_11_14 greg kroah-hartman 36 * - fixed bug in edge_close that kept the port from being used more 37 * than once. 38 * - fixed memory leak on device removal. 39 * - fixed potential double free of memory when command urb submitting 40 * failed. 41 * - other small cleanups when the device is removed 42 * 43 * 2.1 2001_07_09 greg kroah-hartman 44 * - added support for TIOCMBIS and TIOCMBIC. 45 * 46 * (04/08/2001) gb 47 * - Identify version on module load. 48 * 49 * 2.0 2001_03_05 greg kroah-hartman 50 * - reworked entire driver to fit properly in with the other usb-serial 51 * drivers. Occasional oopses still happen, but it's a good start. 52 * 53 * 1.2.3 (02/23/2001) greg kroah-hartman 54 * - changed device table to work properly for 2.4.x final format. 55 * - fixed problem with dropping data at high data rates. 56 * 57 * 1.2.2 (11/27/2000) greg kroah-hartman 58 * - cleaned up more NTisms. 59 * - Added device table for 2.4.0-test11 60 * 61 * 1.2.1 (11/08/2000) greg kroah-hartman 62 * - Started to clean up NTisms. 63 * - Fixed problem with dev field of urb for kernels >= 2.4.0-test9 64 * 65 * 1.2 (10/17/2000) David Iacovelli 66 * Remove all EPIC code and GPL source 67 * Fix RELEVANT_IFLAG macro to include flow control 68 * changes port configuration changes. 69 * Fix redefinition of SERIAL_MAGIC 70 * Change all timeout values to 5 seconds 71 * Tried to fix the UHCI multiple urb submission, but failed miserably. 72 * it seems to work fine with OHCI. 73 * ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must 74 * find a way to work arount this UHCI bug ) 75 * 76 * 1.1 (10/11/2000) David Iacovelli 77 * Fix XON/XOFF flow control to support both IXON and IXOFF 78 * 79 * 0.9.27 (06/30/2000) David Iacovelli 80 * Added transmit queue and now allocate urb for command writes. 81 * 82 * 0.9.26 (06/29/2000) David Iacovelli 83 * Add support for 80251 based edgeport 84 * 85 * 0.9.25 (06/27/2000) David Iacovelli 86 * Do not close the port if it has multiple opens. 87 * 88 * 0.9.24 (05/26/2000) David Iacovelli 89 * Add IOCTLs to support RXTX and JAVA POS 90 * and first cut at running BlackBox Demo 91 * 92 * 0.9.23 (05/24/2000) David Iacovelli 93 * Add IOCTLs to support RXTX and JAVA POS 94 * 95 * 0.9.22 (05/23/2000) David Iacovelli 96 * fixed bug in enumeration. If epconfig turns on mapping by 97 * path after a device is already plugged in, we now update 98 * the mapping correctly 99 * 100 * 0.9.21 (05/16/2000) David Iacovelli 101 * Added BlockUntilChaseResp() to also wait for txcredits 102 * Updated the way we allocate and handle write URBs 103 * Add debug code to dump buffers 104 * 105 * 0.9.20 (05/01/2000) David Iacovelli 106 * change driver to use usb/tts/ 107 * 108 * 0.9.19 (05/01/2000) David Iacovelli 109 * Update code to compile if DEBUG is off 110 * 111 * 0.9.18 (04/28/2000) David Iacovelli 112 * cleanup and test tty_register with devfs 113 * 114 * 0.9.17 (04/27/2000) greg kroah-hartman 115 * changed tty_register around to be like the way it 116 * was before, but now it works properly with devfs. 117 * 118 * 0.9.16 (04/26/2000) david iacovelli 119 * Fixed bug in GetProductInfo() 120 * 121 * 0.9.15 (04/25/2000) david iacovelli 122 * Updated enumeration 123 * 124 * 0.9.14 (04/24/2000) david iacovelli 125 * Removed all config/status IOCTLS and 126 * converted to using /proc/edgeport 127 * still playing with devfs 128 * 129 * 0.9.13 (04/24/2000) david iacovelli 130 * Removed configuration based on ttyUSB0 131 * Added support for configuration using /prod/edgeport 132 * first attempt at using devfs (not working yet!) 133 * Added IOCTL to GetProductInfo() 134 * Added support for custom baud rates 135 * Add support for random port numbers 136 * 137 * 0.9.12 (04/18/2000) david iacovelli 138 * added additional configuration IOCTLs 139 * use ttyUSB0 for configuration 140 * 141 * 0.9.11 (04/17/2000) greg kroah-hartman 142 * fixed module initialization race conditions. 143 * made all urbs dynamically allocated. 144 * made driver devfs compatible. now it only registers the tty device 145 * when the device is actually plugged in. 146 * 147 * 0.9.10 (04/13/2000) greg kroah-hartman 148 * added proc interface framework. 149 * 150 * 0.9.9 (04/13/2000) david iacovelli 151 * added enumeration code and ioctls to configure the device 152 * 153 * 0.9.8 (04/12/2000) david iacovelli 154 * Change interrupt read start when device is plugged in 155 * and stop when device is removed 156 * process interrupt reads when all ports are closed 157 * (keep value of rxBytesAvail consistent with the edgeport) 158 * set the USB_BULK_QUEUE flag so that we can shove a bunch 159 * of urbs at once down the pipe 160 * 161 * 0.9.7 (04/10/2000) david iacovelli 162 * start to add enumeration code. 163 * generate serial number for epic devices 164 * add support for kdb 165 * 166 * 0.9.6 (03/30/2000) david iacovelli 167 * add IOCTL to get string, manufacture, and boot descriptors 168 * 169 * 0.9.5 (03/14/2000) greg kroah-hartman 170 * more error checking added to SerialOpen to try to fix UHCI open problem 171 * 172 * 0.9.4 (03/09/2000) greg kroah-hartman 173 * added more error checking to handle oops when data is hanging 174 * around and tty is abruptly closed. 175 * 176 * 0.9.3 (03/09/2000) david iacovelli 177 * Add epic support for xon/xoff chars 178 * play with performance 179 * 180 * 0.9.2 (03/08/2000) greg kroah-hartman 181 * changed most "info" calls to "dbg" 182 * implemented flow control properly in the termios call 183 * 184 * 0.9.1 (03/08/2000) david iacovelli 185 * added EPIC support 186 * enabled bootloader update 187 * 188 * 0.9 (03/08/2000) greg kroah-hartman 189 * Release to IO networks. 190 * Integrated changes that David made 191 * made getting urbs for writing SMP safe 192 * 193 * 0.8 (03/07/2000) greg kroah-hartman 194 * Release to IO networks. 195 * Fixed problems that were seen in code by David. 196 * Now both Edgeport/4 and Edgeport/2 works properly. 197 * Changed most of the functions to use port instead of serial. 198 * 199 * 0.7 (02/27/2000) greg kroah-hartman 200 * Milestone 3 release. 201 * Release to IO Networks 202 * ioctl for waiting on line change implemented. 203 * ioctl for getting statistics implemented. 204 * multiport support working. 205 * lsr and msr registers are now handled properly. 206 * change break now hooked up and working. 207 * support for all known Edgeport devices. 208 * 209 * 0.6 (02/22/2000) greg kroah-hartman 210 * Release to IO networks. 211 * CHASE is implemented correctly when port is closed. 212 * SerialOpen now blocks correctly until port is fully opened. 213 * 214 * 0.5 (02/20/2000) greg kroah-hartman 215 * Release to IO networks. 216 * Known problems: 217 * modem status register changes are not sent on to the user 218 * CHASE is not implemented when the port is closed. 219 * 220 * 0.4 (02/16/2000) greg kroah-hartman 221 * Second cut at the CeBit demo. 222 * Doesn't leak memory on every write to the port 223 * Still small leaks on startup. 224 * Added support for Edgeport/2 and Edgeport/8 225 * 226 * 0.3 (02/15/2000) greg kroah-hartman 227 * CeBit demo release. 228 * Force the line settings to 4800, 8, 1, e for the demo. 229 * Warning! This version leaks memory like crazy! 230 * 231 * 0.2 (01/30/2000) greg kroah-hartman 232 * Milestone 1 release. 233 * Device is found by USB subsystem, enumerated, fimware is downloaded 234 * and the descriptors are printed to the debug log, config is set, and 235 * green light starts to blink. Open port works, and data can be sent 236 * and received at the default settings of the UART. Loopback connector 237 * and debug log confirms this. 238 * 239 * 0.1 (01/23/2000) greg kroah-hartman 240 * Initial release to help IO Networks try to set up their test system. 241 * Edgeport4 is recognized, firmware is downloaded, config is set so 242 * device blinks green light every 3 sec. Port is bound, but opening, 243 * closing, and sending data do not work properly. 244 * 245 */ 246 247#include <linux/config.h> 248#include <linux/kernel.h> 249#include <linux/errno.h> 250#include <linux/init.h> 251#include <linux/slab.h> 252#include <linux/tty.h> 253#include <linux/tty_driver.h> 254#include <linux/tty_flip.h> 255#include <linux/module.h> 256#include <linux/spinlock.h> 257#include <linux/serial.h> 258#include <linux/ioctl.h> 259#include <asm/uaccess.h> 260#include <linux/usb.h> 261 262#ifdef CONFIG_USB_SERIAL_DEBUG 263 static int debug = 1; 264#else 265 static int debug; 266#endif 267 268#include "usb-serial.h" 269 270#include "io_edgeport.h" 271#include "io_ionsp.h" /* info for the iosp messages */ 272#include "io_16654.h" /* 16654 UART defines */ 273 274/* 275 * Version Information 276 */ 277#define DRIVER_VERSION "v2.3" 278#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 279#define DRIVER_DESC "Edgeport USB Serial Driver" 280 281/* First, the latest boot code - for first generation edgeports */ 282#define IMAGE_ARRAY_NAME BootCodeImage_GEN1 283#define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1 284#include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */ 285 286/* for second generation edgeports */ 287#define IMAGE_ARRAY_NAME BootCodeImage_GEN2 288#define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2 289#include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */ 290 291/* Then finally the main run-time operational code - for first generation edgeports */ 292#define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1 293#define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1 294#include "io_fw_down.h" /* Define array OperationalCodeImage[] */ 295 296/* for second generation edgeports */ 297#define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2 298#define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2 299#include "io_fw_down2.h" /* Define array OperationalCodeImage[] */ 300 301 302#define MAX_NAME_LEN 64 303 304 305#define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 306#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 307#define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 308 309#ifndef SERIAL_MAGIC 310 #define SERIAL_MAGIC 0x6702 311#endif 312#define PORT_MAGIC 0x7301 313 314 315/* receive port state */ 316enum RXSTATE { 317 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 318 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 319 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 320 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 321}; 322 323 324/* Transmit Fifo 325 * This Transmit queue is an extension of the edgeport Rx buffer. 326 * The maximum amount of data buffered in both the edgeport 327 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 328 */ 329struct TxFifo { 330 unsigned int head; /* index to head pointer (write) */ 331 unsigned int tail; /* index to tail pointer (read) */ 332 unsigned int count; /* Bytes in queue */ 333 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 334 unsigned char *fifo; /* allocated Buffer */ 335}; 336 337/* This structure holds all of the local port information */ 338struct edgeport_port { 339 __u16 txCredits; /* our current credits for this port */ 340 __u16 maxTxCredits; /* the max size of the port */ 341 342 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 343 struct urb *write_urb; /* write URB for this port */ 344 char write_in_progress; /* TRUE while a write URB is outstanding */ 345 346 __u8 shadowLCR; /* last LCR value received */ 347 __u8 shadowMCR; /* last MCR value received */ 348 __u8 shadowMSR; /* last MSR value received */ 349 __u8 shadowLSR; /* last LSR value received */ 350 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 351 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 352 __u8 validDataMask; 353 __u32 baudRate; 354 355 char open; 356 char openPending; 357 char commandPending; 358 char closePending; 359 char chaseResponsePending; 360 361 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 362 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 363 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 364 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 365 366 struct async_icount icount; 367 struct usb_serial_port *port; /* loop back to the owner of this object */ 368}; 369 370 371/* This structure holds all of the individual device information */ 372struct edgeport_serial { 373 char name[MAX_NAME_LEN+1]; /* string name of this device */ 374 375 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 376 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 377 struct edgeport_product_info product_info; /* Product Info */ 378 379 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 380 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 381 struct urb * interrupt_read_urb; /* our interrupt urb */ 382 383 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 384 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 385 struct urb * read_urb; /* our bulk read urb */ 386 387 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 388 389 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 390 391 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 392 __u8 rxHeader1; /* receive header byte 1 */ 393 __u8 rxHeader2; /* receive header byte 2 */ 394 __u8 rxHeader3; /* receive header byte 3 */ 395 __u8 rxPort; /* the port that we are currently receiving data for */ 396 __u8 rxStatusCode; /* the receive status code */ 397 __u8 rxStatusParam; /* the receive status paramater */ 398 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 399 struct usb_serial *serial; /* loop back to the owner of this object */ 400}; 401 402/* baud rate information */ 403struct divisor_table_entry { 404 __u32 BaudRate; 405 __u16 Divisor; 406}; 407 408// 409// Define table of divisors for Rev A EdgePort/4 hardware 410// These assume a 3.6864MHz crystal, the standard /16, and 411// MCR.7 = 0. 412// 413static struct divisor_table_entry divisor_table[] = { 414 { 50, 4608}, 415 { 75, 3072}, 416 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 417 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 418 { 150, 1536}, 419 { 300, 768}, 420 { 600, 384}, 421 { 1200, 192}, 422 { 1800, 128}, 423 { 2400, 96}, 424 { 4800, 48}, 425 { 7200, 32}, 426 { 9600, 24}, 427 { 14400, 16}, 428 { 19200, 12}, 429 { 38400, 6}, 430 { 57600, 4}, 431 { 115200, 2}, 432 { 230400, 1}, 433}; 434 435/* local variables */ 436static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */ 437 438 439/* local function prototypes */ 440 441/* function prototypes for all URB callbacks */ 442static void edge_interrupt_callback (struct urb *urb); 443static void edge_bulk_in_callback (struct urb *urb); 444static void edge_bulk_out_data_callback (struct urb *urb); 445static void edge_bulk_out_cmd_callback (struct urb *urb); 446 447/* function prototypes for the usbserial callbacks */ 448static int edge_open (struct usb_serial_port *port, struct file *filp); 449static void edge_close (struct usb_serial_port *port, struct file *filp); 450static int edge_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count); 451static int edge_write_room (struct usb_serial_port *port); 452static int edge_chars_in_buffer (struct usb_serial_port *port); 453static void edge_throttle (struct usb_serial_port *port); 454static void edge_unthrottle (struct usb_serial_port *port); 455static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios); 456static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 457static void edge_break (struct usb_serial_port *port, int break_state); 458static int edge_startup (struct usb_serial *serial); 459static void edge_shutdown (struct usb_serial *serial); 460 461 462#include "io_tables.h" /* all of the devices that this driver supports */ 463 464 465/* function prototypes for all of our local functions */ 466static int process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); 467static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); 468static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr); 469static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); 470static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param); 471static int calc_baud_rate_divisor (int baud_rate, int *divisor); 472static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate); 473static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios); 474static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue); 475static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength); 476static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port); 477 478static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 479static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 480static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 481static void get_manufacturing_desc (struct edgeport_serial *edge_serial); 482static void get_boot_desc (struct edgeport_serial *edge_serial); 483static void load_application_firmware (struct edgeport_serial *edge_serial); 484 485 486static void unicode_to_ascii (char *string, short *unicode, int unicode_size); 487 488 489 490 491 492// ************************************************************************ 493// ************************************************************************ 494// ************************************************************************ 495// ************************************************************************ 496 497/************************************************************************ 498 * * 499 * update_edgeport_E2PROM() Compare current versions of * 500 * Boot ROM and Manufacture * 501 * Descriptors with versions * 502 * embedded in this driver * 503 * * 504 ************************************************************************/ 505static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) 506{ 507 __u32 BootCurVer; 508 __u32 BootNewVer; 509 __u8 BootMajorVersion; 510 __u8 BootMinorVersion; 511 __u16 BootBuildNumber; 512 __u8 *BootImage; 513 __u32 BootSize; 514 struct edge_firmware_image_record *record; 515 unsigned char *firmware; 516 int response; 517 518 519 switch (edge_serial->product_info.iDownloadFile) { 520 case EDGE_DOWNLOAD_FILE_I930: 521 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion; 522 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion; 523 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber); 524 BootImage = &BootCodeImage_GEN1[0]; 525 BootSize = sizeof( BootCodeImage_GEN1 ); 526 break; 527 528 case EDGE_DOWNLOAD_FILE_80251: 529 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion; 530 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion; 531 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber); 532 BootImage = &BootCodeImage_GEN2[0]; 533 BootSize = sizeof( BootCodeImage_GEN2 ); 534 break; 535 536 default: 537 return; 538 } 539 540 // Check Boot Image Version 541 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 542 (edge_serial->boot_descriptor.MinorVersion << 16) + 543 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 544 545 BootNewVer = (BootMajorVersion << 24) + 546 (BootMinorVersion << 16) + 547 le16_to_cpu(BootBuildNumber); 548 549 dbg("Current Boot Image version %d.%d.%d", 550 edge_serial->boot_descriptor.MajorVersion, 551 edge_serial->boot_descriptor.MinorVersion, 552 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 553 554 555 if (BootNewVer > BootCurVer) { 556 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 557 edge_serial->boot_descriptor.MajorVersion, 558 edge_serial->boot_descriptor.MinorVersion, 559 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 560 BootMajorVersion, 561 BootMinorVersion, 562 le16_to_cpu(BootBuildNumber)); 563 564 565 dbg("Downloading new Boot Image"); 566 567 firmware = BootImage; 568 569 for (;;) { 570 record = (struct edge_firmware_image_record *)firmware; 571 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 572 if (response < 0) { 573 err("rom_write failed (%x, %x, %d)", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 574 break; 575 } 576 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 577 if (firmware >= &BootImage[BootSize]) { 578 break; 579 } 580 } 581 } else { 582 dbg("Boot Image -- already up to date"); 583 } 584} 585 586 587/************************************************************************ 588 * * 589 * Get string descriptor from device * 590 * * 591 ************************************************************************/ 592static int get_string (struct usb_device *dev, int Id, char *string) 593{ 594 struct usb_string_descriptor StringDesc; 595 struct usb_string_descriptor *pStringDesc; 596 597 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 598 599 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 600 return 0; 601 } 602 603 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 604 605 if (!pStringDesc) { 606 return 0; 607 } 608 609 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 610 kfree(pStringDesc); 611 return 0; 612 } 613 614 unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1); 615 616 kfree(pStringDesc); 617 return strlen(string); 618} 619 620 621#if 0 622/************************************************************************ 623 * 624 * Get string descriptor from device 625 * 626 ************************************************************************/ 627static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc) 628{ 629 struct usb_string_descriptor StringDesc; 630 struct usb_string_descriptor *pStringDesc; 631 632 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 633 634 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 635 return 0; 636 } 637 638 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 639 640 if (!pStringDesc) { 641 return -1; 642 } 643 644 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 645 kfree(pStringDesc); 646 return -1; 647 } 648 649 *pRetDesc = pStringDesc; 650 return 0; 651} 652#endif 653 654static void get_product_info(struct edgeport_serial *edge_serial) 655{ 656 struct edgeport_product_info *product_info = &edge_serial->product_info; 657 658 memset (product_info, 0, sizeof(struct edgeport_product_info)); 659 660 product_info->ProductId = (__u16)(edge_serial->serial->dev->descriptor.idProduct & ~ION_DEVICE_ID_GENERATION_2); 661 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 662 product_info->ProdInfoVer = 0; 663 664 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 665 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 666 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 667 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 668 669 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion; 670 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion; 671 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber; 672 673 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate)); 674 675 // check if this is 2nd generation hardware 676 if (edge_serial->serial->dev->descriptor.idProduct & ION_DEVICE_ID_GENERATION_2) { 677 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion; 678 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion; 679 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber); 680 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 681 } else { 682 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion; 683 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion; 684 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber); 685 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 686 } 687 688 // Determine Product type and set appropriate flags 689 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 690 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 691 case ION_DEVICE_ID_EDGEPORT_4T: 692 case ION_DEVICE_ID_EDGEPORT_4: 693 case ION_DEVICE_ID_EDGEPORT_2: 694 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 695 case ION_DEVICE_ID_EDGEPORT_8: 696 case ION_DEVICE_ID_EDGEPORT_421: 697 case ION_DEVICE_ID_EDGEPORT_21: 698 case ION_DEVICE_ID_EDGEPORT_2_DIN: 699 case ION_DEVICE_ID_EDGEPORT_4_DIN: 700 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 701 product_info->IsRS232 = 1; 702 break; 703 704 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485 705 product_info->IsRS422 = 1; 706 product_info->IsRS485 = 1; 707 break; 708 709 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422 710 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422 711 product_info->IsRS422 = 1; 712 break; 713 } 714 715 // Dump Product Info structure 716 dbg("**Product Information:"); 717 dbg(" ProductId %x", product_info->ProductId ); 718 dbg(" NumPorts %d", product_info->NumPorts ); 719 dbg(" ProdInfoVer %d", product_info->ProdInfoVer ); 720 dbg(" IsServer %d", product_info->IsServer); 721 dbg(" IsRS232 %d", product_info->IsRS232 ); 722 dbg(" IsRS422 %d", product_info->IsRS422 ); 723 dbg(" IsRS485 %d", product_info->IsRS485 ); 724 dbg(" RomSize %d", product_info->RomSize ); 725 dbg(" RamSize %d", product_info->RamSize ); 726 dbg(" CpuRev %x", product_info->CpuRev ); 727 dbg(" BoardRev %x", product_info->BoardRev); 728 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 729 product_info->BootMinorVersion, 730 le16_to_cpu(product_info->BootBuildNumber)); 731 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion, 732 product_info->FirmwareMinorVersion, 733 le16_to_cpu(product_info->FirmwareBuildNumber)); 734 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0], 735 product_info->ManufactureDescDate[1], 736 product_info->ManufactureDescDate[2]+1900); 737 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 738 739} 740 741 742/************************************************************************/ 743/************************************************************************/ 744/* U S B C A L L B A C K F U N C T I O N S */ 745/* U S B C A L L B A C K F U N C T I O N S */ 746/************************************************************************/ 747/************************************************************************/ 748 749/***************************************************************************** 750 * edge_interrupt_callback 751 * this is the callback function for when we have received data on the 752 * interrupt endpoint. 753 *****************************************************************************/ 754static void edge_interrupt_callback (struct urb *urb) 755{ 756 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 757 struct edgeport_port *edge_port; 758 struct usb_serial_port *port; 759 unsigned char *data = urb->transfer_buffer; 760 int length = urb->actual_length; 761 int bytes_avail; 762 int position; 763 int txCredits; 764 int portNumber; 765 int result; 766 767 dbg("%s", __FUNCTION__); 768 769 if (serial_paranoia_check (edge_serial->serial, __FUNCTION__)) { 770 return; 771 } 772 773 if (urb->status) { 774 dbg("%s - nonzero control read status received: %d", __FUNCTION__, urb->status); 775 return; 776 } 777 778 // process this interrupt-read even if there are no ports open 779 if (length) { 780 usb_serial_debug_data (__FILE__, __FUNCTION__, length, data); 781 782 if (length > 1) { 783 bytes_avail = data[0] | (data[1] << 8); 784 if (bytes_avail) { 785 edge_serial->rxBytesAvail += bytes_avail; 786 dbg("%s - bytes_avail = %d, rxBytesAvail %d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail); 787 788 if ((edge_serial->rxBytesAvail > 0) && 789 (edge_serial->read_urb->status != -EINPROGRESS)) { 790 dbg(" --- Posting a read"); 791 792 /* we have pending bytes on the bulk in pipe, send a request */ 793 edge_serial->read_urb->dev = edge_serial->serial->dev; 794 result = usb_submit_urb(edge_serial->read_urb); 795 if (result) { 796 dbg("%s - usb_submit_urb(read bulk) failed with result = %d", __FUNCTION__, result); 797 } 798 } 799 } 800 } 801 /* grab the txcredits for the ports if available */ 802 position = 2; 803 portNumber = 0; 804 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { 805 txCredits = data[position] | (data[position+1] << 8); 806 if (txCredits) { 807 port = &edge_serial->serial->port[portNumber]; 808 if (port_paranoia_check (port, __FUNCTION__) == 0) { 809 edge_port = (struct edgeport_port *)port->private; 810 if (edge_port->open) { 811 edge_port->txCredits += txCredits; 812 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); 813 814 /* tell the tty driver that something has changed */ 815 if (edge_port->port->tty) 816 wake_up_interruptible(&edge_port->port->tty->write_wait); 817 818 // Since we have more credit, check if more data can be sent 819 send_more_port_data(edge_serial, edge_port); 820 } 821 } 822 } 823 position += 2; 824 ++portNumber; 825 } 826 } 827} 828 829 830/***************************************************************************** 831 * edge_bulk_in_callback 832 * this is the callback function for when we have received data on the 833 * bulk in endpoint. 834 *****************************************************************************/ 835static void edge_bulk_in_callback (struct urb *urb) 836{ 837 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 838 unsigned char *data = urb->transfer_buffer; 839 int status; 840 __u16 raw_data_length; 841 842 dbg("%s", __FUNCTION__); 843 844 if (serial_paranoia_check (edge_serial->serial, __FUNCTION__)) { 845 return; 846 } 847 848 if (urb->status) { 849 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 850 return; 851 } 852 853 if (urb->actual_length) { 854 raw_data_length = urb->actual_length; 855 856 usb_serial_debug_data (__FILE__, __FUNCTION__, raw_data_length, data); 857 858 /* decrement our rxBytes available by the number that we just got */ 859 edge_serial->rxBytesAvail -= raw_data_length; 860 861 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); 862 863 process_rcvd_data (edge_serial, data, urb->actual_length); 864 865 /* check to see if there's any more data for us to read */ 866 if ((edge_serial->rxBytesAvail > 0) && 867 (edge_serial->read_urb->status != -EINPROGRESS)) { 868 dbg(" --- Posting a read"); 869 870 /* there is, so resubmit our urb */ 871 edge_serial->read_urb->dev = edge_serial->serial->dev; 872 status = usb_submit_urb(edge_serial->read_urb); 873 if (status) { 874 err("%s - usb_submit_urb(read bulk) failed, status = %d", __FUNCTION__, status); 875 } 876 } 877 } 878} 879 880 881/***************************************************************************** 882 * edge_bulk_out_data_callback 883 * this is the callback function for when we have finished sending serial data 884 * on the bulk out endpoint. 885 *****************************************************************************/ 886static void edge_bulk_out_data_callback (struct urb *urb) 887{ 888 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 889 struct tty_struct *tty; 890 891 dbg("%s", __FUNCTION__); 892 893 if (port_paranoia_check (edge_port->port, __FUNCTION__)) { 894 return; 895 } 896 897 if (urb->status) { 898 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 899 } 900 901 tty = edge_port->port->tty; 902 903 if (tty && edge_port->open) { 904 /* let the tty driver wakeup if it has a special write_wakeup function */ 905 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) { 906 (tty->ldisc.write_wakeup)(tty); 907 } 908 909 /* tell the tty driver that something has changed */ 910 wake_up_interruptible(&tty->write_wait); 911 } 912 913 // Release the Write URB 914 edge_port->write_in_progress = FALSE; 915 916 // Check if more data needs to be sent 917 send_more_port_data((struct edgeport_serial *)(edge_port->port->serial->private), edge_port); 918} 919 920 921/***************************************************************************** 922 * BulkOutCmdCallback 923 * this is the callback function for when we have finished sending a command 924 * on the bulk out endpoint. 925 *****************************************************************************/ 926static void edge_bulk_out_cmd_callback (struct urb *urb) 927{ 928 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 929 struct tty_struct *tty; 930 int status = urb->status; 931 932 dbg("%s", __FUNCTION__); 933 934 CmdUrbs--; 935 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 936 937 938 /* clean up the transfer buffer */ 939 if (urb->transfer_buffer != NULL) { 940 kfree(urb->transfer_buffer); 941 } 942 943 // Free the command urb 944 usb_unlink_urb (urb); 945 usb_free_urb (urb); 946 947 if (port_paranoia_check (edge_port->port, __FUNCTION__)) { 948 return; 949 } 950 951 if (status) { 952 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); 953 return; 954 } 955 956 /* Get pointer to tty */ 957 tty = edge_port->port->tty; 958 959 /* tell the tty driver that something has changed */ 960 if (tty && edge_port->open) 961 wake_up_interruptible(&tty->write_wait); 962 963 /* we have completed the command */ 964 edge_port->commandPending = FALSE; 965 wake_up_interruptible(&edge_port->wait_command); 966} 967 968 969/***************************************************************************** 970 * Driver tty interface functions 971 *****************************************************************************/ 972 973/***************************************************************************** 974 * SerialOpen 975 * this function is called by the tty driver when a port is opened 976 * If successful, we return 0 977 * Otherwise we return a negative error number. 978 *****************************************************************************/ 979static int edge_open (struct usb_serial_port *port, struct file * filp) 980{ 981 struct edgeport_port *edge_port = (struct edgeport_port *)port->private; 982 struct usb_serial *serial; 983 struct edgeport_serial *edge_serial; 984 int response; 985 int timeout; 986 987 if (port_paranoia_check (port, __FUNCTION__)) 988 return -ENODEV; 989 990 dbg("%s - port %d", __FUNCTION__, port->number); 991 992 if (edge_port == NULL) 993 return -ENODEV; 994 995 /* force low_latency on so that our tty_push actually forces the data through, 996 otherwise it is scheduled, and with high data rates (like with OHCI) data 997 can get lost. */ 998 if (port->tty) 999 port->tty->low_latency = 1; 1000 1001 /* see if we've set up our endpoint info yet (can't set it up in edge_startup 1002 as the structures were not set up at that time.) */ 1003 serial = port->serial; 1004 edge_serial = (struct edgeport_serial *)serial->private; 1005 if (edge_serial == NULL) { 1006 return -ENODEV; 1007 } 1008 if (edge_serial->interrupt_in_buffer == NULL) { 1009 struct usb_serial_port *port0 = &serial->port[0]; 1010 1011 /* not set up yet, so do it now */ 1012 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; 1013 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; 1014 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 1015 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 1016 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; 1017 edge_serial->read_urb = port0->read_urb; 1018 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; 1019 1020 /* set up our interrupt urb */ 1021 FILL_INT_URB(edge_serial->interrupt_read_urb, 1022 serial->dev, 1023 usb_rcvintpipe(serial->dev, 1024 port0->interrupt_in_endpointAddress), 1025 port0->interrupt_in_buffer, 1026 edge_serial->interrupt_read_urb->transfer_buffer_length, 1027 edge_interrupt_callback, edge_serial, 1028 edge_serial->interrupt_read_urb->interval); 1029 1030 /* set up our bulk in urb */ 1031 FILL_BULK_URB(edge_serial->read_urb, serial->dev, 1032 usb_rcvbulkpipe(serial->dev, port0->bulk_in_endpointAddress), 1033 port0->bulk_in_buffer, 1034 edge_serial->read_urb->transfer_buffer_length, 1035 edge_bulk_in_callback, edge_serial); 1036 1037 /* start interrupt read for this edgeport 1038 * this interrupt will continue as long as the edgeport is connected */ 1039 response = usb_submit_urb (edge_serial->interrupt_read_urb); 1040 if (response) { 1041 err("%s - Error %d submitting control urb", __FUNCTION__, response); 1042 } 1043 } 1044 1045 /* initialize our wait queues */ 1046 init_waitqueue_head(&edge_port->wait_open); 1047 init_waitqueue_head(&edge_port->wait_chase); 1048 init_waitqueue_head(&edge_port->delta_msr_wait); 1049 init_waitqueue_head(&edge_port->wait_command); 1050 1051 /* initialize our icount structure */ 1052 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 1053 1054 /* initialize our port settings */ 1055 edge_port->txCredits = 0; /* Can't send any data yet */ 1056 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ 1057 edge_port->chaseResponsePending = FALSE; 1058 1059 /* send a open port command */ 1060 edge_port->openPending = TRUE; 1061 edge_port->open = FALSE; 1062 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); 1063 1064 if (response < 0) { 1065 err("%s - error sending open port command", __FUNCTION__); 1066 edge_port->openPending = FALSE; 1067 return -ENODEV; 1068 } 1069 1070 /* now wait for the port to be completly opened */ 1071 timeout = OPEN_TIMEOUT; 1072 while (timeout && edge_port->openPending == TRUE) { 1073 timeout = interruptible_sleep_on_timeout (&edge_port->wait_open, timeout); 1074 } 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); 1098 1099 if (!edge_port->write_urb) { 1100 dbg("%s - no memory", __FUNCTION__); 1101 edge_close (port, filp); 1102 return -ENOMEM; 1103 } 1104 1105 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); 1106 1107 dbg("%s exited", __FUNCTION__); 1108 1109 return 0; 1110} 1111 1112 1113/************************************************************************ 1114 * 1115 * block_until_chase_response 1116 * 1117 * This function will block the close until one of the following: 1118 * 1. Response to our Chase comes from Edgeport 1119 * 2. A timout of 10 seconds without activity has expired 1120 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 1121 * 1122 ************************************************************************/ 1123static void block_until_chase_response(struct edgeport_port *edge_port) 1124{ 1125 __u16 lastCredits; 1126 int timeout = 1*HZ; 1127 int wait = 10; 1128 1129 while (1) { 1130 // Save Last credits 1131 lastCredits = edge_port->txCredits; 1132 1133 // Did we get our Chase response 1134 if (edge_port->chaseResponsePending == FALSE) { 1135 dbg("%s - Got Chase Response", __FUNCTION__); 1136 1137 // did we get all of our credit back? 1138 if (edge_port->txCredits == edge_port->maxTxCredits ) { 1139 dbg("%s - Got all credits", __FUNCTION__); 1140 return; 1141 } 1142 } 1143 1144 // Block the thread for a while 1145 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout); 1146 1147 if (lastCredits == edge_port->txCredits) { 1148 // No activity.. count down. 1149 wait--; 1150 if (wait == 0) { 1151 edge_port->chaseResponsePending = FALSE; 1152 dbg("%s - Chase TIMEOUT", __FUNCTION__); 1153 return; 1154 } 1155 } else { 1156 // Reset timout value back to 10 seconds 1157 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); 1158 wait = 10; 1159 } 1160 } 1161} 1162 1163 1164/************************************************************************ 1165 * 1166 * block_until_tx_empty 1167 * 1168 * This function will block the close until one of the following: 1169 * 1. TX count are 0 1170 * 2. The edgeport has stopped 1171 * 3. A timout of 3 seconds without activity has expired 1172 * 1173 ************************************************************************/ 1174static void block_until_tx_empty (struct edgeport_port *edge_port) 1175{ 1176 struct TxFifo *fifo = &edge_port->txfifo; 1177 __u32 lastCount; 1178 int timeout = HZ/10; 1179 int wait = 30; 1180 1181 while (1) { 1182 // Save Last count 1183 lastCount = fifo->count; 1184 1185 // Is the Edgeport Buffer empty? 1186 if (lastCount == 0) { 1187 dbg("%s - TX Buffer Empty", __FUNCTION__); 1188 return; 1189 } 1190 1191 // Block the thread for a while 1192 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout); 1193 1194 dbg("%s wait", __FUNCTION__); 1195 1196 if (lastCount == fifo->count) { 1197 // No activity.. count down. 1198 wait--; 1199 if (wait == 0) { 1200 dbg("%s - TIMEOUT", __FUNCTION__); 1201 return; 1202 } 1203 } else { 1204 // Reset timout value back to seconds 1205 wait = 30; 1206 } 1207 } 1208} 1209 1210 1211/***************************************************************************** 1212 * edge_close 1213 * this function is called by the tty driver when a port is closed 1214 *****************************************************************************/ 1215static void edge_close (struct usb_serial_port *port, struct file * filp) 1216{ 1217 struct usb_serial *serial; 1218 struct edgeport_serial *edge_serial; 1219 struct edgeport_port *edge_port; 1220 int status; 1221 1222 if (port_paranoia_check (port, __FUNCTION__)) 1223 return; 1224 1225 dbg("%s - port %d", __FUNCTION__, port->number); 1226 1227 serial = get_usb_serial (port, __FUNCTION__); 1228 if (!serial) 1229 return; 1230 1231 edge_serial = (struct edgeport_serial *)serial->private; 1232 edge_port = (struct edgeport_port *)port->private; 1233 if ((edge_serial == NULL) || (edge_port == NULL)) 1234 return; 1235 1236 if (serial->dev) { 1237 // block until tx is empty 1238 block_until_tx_empty(edge_port); 1239 1240 edge_port->closePending = TRUE; 1241 1242 /* flush and chase */ 1243 edge_port->chaseResponsePending = TRUE; 1244 1245 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1246 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1247 if (status == 0) { 1248 // block until chase finished 1249 block_until_chase_response(edge_port); 1250 } else { 1251 edge_port->chaseResponsePending = FALSE; 1252 } 1253 1254 /* close the port */ 1255 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); 1256 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); 1257 1258 //port->close = TRUE; 1259 edge_port->closePending = FALSE; 1260 edge_port->open = FALSE; 1261 edge_port->openPending = FALSE; 1262 1263 if (edge_port->write_urb) { 1264 usb_unlink_urb (edge_port->write_urb); 1265 } 1266 } 1267 1268 if (edge_port->write_urb) { 1269 /* if this urb had a transfer buffer already (old transfer) free it */ 1270 if (edge_port->write_urb->transfer_buffer != NULL) { 1271 kfree(edge_port->write_urb->transfer_buffer); 1272 } 1273 usb_free_urb (edge_port->write_urb); 1274 } 1275 if (edge_port->txfifo.fifo) { 1276 kfree(edge_port->txfifo.fifo); 1277 } 1278 1279 dbg("%s exited", __FUNCTION__); 1280} 1281 1282/***************************************************************************** 1283 * SerialWrite 1284 * this function is called by the tty driver when data should be written to 1285 * the port. 1286 * If successful, we return the number of bytes written, otherwise we return 1287 * a negative error number. 1288 *****************************************************************************/ 1289static int edge_write (struct usb_serial_port *port, int from_user, const unsigned char *data, int count) 1290{ 1291 struct edgeport_port *edge_port = (struct edgeport_port *)port->private; 1292 struct TxFifo *fifo; 1293 int copySize; 1294 int bytesleft; 1295 int firsthalf; 1296 int secondhalf; 1297 1298 dbg("%s - port %d", __FUNCTION__, port->number); 1299 1300 if (edge_port == NULL) 1301 return -ENODEV; 1302 1303 // get a pointer to the Tx fifo 1304 fifo = &edge_port->txfifo; 1305 1306 // calculate number of bytes to put in fifo 1307 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); 1308 1309 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, 1310 port->number, count, edge_port->txCredits - fifo->count, copySize); 1311 1312 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ 1313 if (copySize == 0) { 1314 dbg("%s - copySize = Zero", __FUNCTION__); 1315 return 0; 1316 } 1317 1318 // queue the data 1319 // since we can never overflow the buffer we do not have to check for full condition 1320 1321 // the copy is done is two parts -- first fill to the end of the buffer 1322 // then copy the reset from the start of the buffer 1323 1324 bytesleft = fifo->size - fifo->head; 1325 firsthalf = min (bytesleft, copySize); 1326 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); 1327 1328 /* now copy our data */ 1329 if (from_user) { 1330 if (copy_from_user(&fifo->fifo[fifo->head], data, firsthalf)) 1331 return -EFAULT; 1332 } else { 1333 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1334 } 1335 1336 // update the index and size 1337 fifo->head += firsthalf; 1338 fifo->count += firsthalf; 1339 1340 // wrap the index 1341 if (fifo->head == fifo->size) { 1342 fifo->head = 0; 1343 } 1344 1345 secondhalf = copySize-firsthalf; 1346 1347 if (secondhalf) { 1348 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); 1349 if (from_user) { 1350 if (copy_from_user(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf)) 1351 return -EFAULT; 1352 } else { 1353 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1354 } 1355 // update the index and size 1356 fifo->count += secondhalf; 1357 fifo->head += secondhalf; 1358 // No need to check for wrap since we can not get to end of fifo in this part 1359 } 1360 1361 if (copySize) { 1362 usb_serial_debug_data (__FILE__, __FUNCTION__, copySize, data); 1363 } 1364 1365 send_more_port_data((struct edgeport_serial *)port->serial->private, edge_port); 1366 1367 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); 1368 1369 return copySize; 1370} 1371 1372 1373/************************************************************************ 1374 * 1375 * send_more_port_data() 1376 * 1377 * This routine attempts to write additional UART transmit data 1378 * to a port over the USB bulk pipe. It is called (1) when new 1379 * data has been written to a port's TxBuffer from higher layers 1380 * (2) when the peripheral sends us additional TxCredits indicating 1381 * that it can accept more Tx data for a given port; and (3) when 1382 * a bulk write completes successfully and we want to see if we 1383 * can transmit more. 1384 * 1385 ************************************************************************/ 1386static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) 1387{ 1388 struct TxFifo *fifo = &edge_port->txfifo; 1389 struct urb *urb; 1390 unsigned char *buffer; 1391 int status; 1392 int count; 1393 int bytesleft; 1394 int firsthalf; 1395 int secondhalf; 1396 1397 dbg("%s(%d)", __FUNCTION__, edge_port->port->number); 1398 1399 if (edge_port->write_in_progress || 1400 !edge_port->open || 1401 (fifo->count == 0)) { 1402 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); 1403 return; 1404 } 1405 1406 // since the amount of data in the fifo will always fit into the 1407 // edgeport buffer we do not need to check the write length 1408 1409 // Do we have enough credits for this port to make it worthwhile 1410 // to bother queueing a write. If it's too small, say a few bytes, 1411 // it's better to wait for more credits so we can do a larger 1412 // write. 1413 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits)) { 1414 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); 1415 return; 1416 } 1417 1418 // lock this write 1419 edge_port->write_in_progress = TRUE; 1420 1421 // get a pointer to the write_urb 1422 urb = edge_port->write_urb; 1423 1424 /* if this urb had a transfer buffer already (old transfer) free it */ 1425 if (urb->transfer_buffer != NULL) { 1426 kfree(urb->transfer_buffer); 1427 urb->transfer_buffer = NULL; 1428 } 1429 1430 /* build the data header for the buffer and port that we are about to send out */ 1431 count = fifo->count; 1432 buffer = kmalloc (count+2, GFP_ATOMIC); 1433 if (buffer == NULL) { 1434 err("%s - no more kernel memory...", __FUNCTION__); 1435 edge_port->write_in_progress = FALSE; 1436 return; 1437 } 1438 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); 1439 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); 1440 1441 /* now copy our data */ 1442 bytesleft = fifo->size - fifo->tail; 1443 firsthalf = min (bytesleft, count); 1444 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1445 fifo->tail += firsthalf; 1446 fifo->count -= firsthalf; 1447 if (fifo->tail == fifo->size) { 1448 fifo->tail = 0; 1449 } 1450 1451 secondhalf = count-firsthalf; 1452 if (secondhalf) { 1453 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); 1454 fifo->tail += secondhalf; 1455 fifo->count -= secondhalf; 1456 } 1457 1458 if (count) { 1459 usb_serial_debug_data (__FILE__, __FUNCTION__, count, &buffer[2]); 1460 } 1461 1462 /* fill up the urb with all of our data and submit it */ 1463 FILL_BULK_URB (urb, edge_serial->serial->dev, 1464 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 1465 buffer, count+2, edge_bulk_out_data_callback, edge_port); 1466 1467 /* set the USB_BULK_QUEUE flag so that we can shove a bunch of urbs at once down the pipe */ 1468 urb->transfer_flags |= USB_QUEUE_BULK; 1469 1470 urb->dev = edge_serial->serial->dev; 1471 /* decrement the number of credits we have by the number we just sent */ 1472 edge_port->txCredits -= count; 1473 edge_port->icount.tx += count; 1474 1475 status = usb_submit_urb(urb); 1476 if (status) { 1477 /* something went wrong */ 1478 dbg("%s - usb_submit_urb(write bulk) failed", __FUNCTION__); 1479 edge_port->write_in_progress = FALSE; 1480 1481 /*revert the count if something bad happened...*/ 1482 edge_port->txCredits += count; 1483 edge_port->icount.tx -= count; 1484 } 1485 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); 1486} 1487 1488 1489/***************************************************************************** 1490 * edge_write_room 1491 * this function is called by the tty driver when it wants to know how many 1492 * bytes of data we can accept for a specific port. 1493 * If successful, we return the amount of room that we have for this port 1494 * (the txCredits), 1495 * Otherwise we return a negative error number. 1496 *****************************************************************************/ 1497static int edge_write_room (struct usb_serial_port *port) 1498{ 1499 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1500 int room; 1501 1502 dbg("%s", __FUNCTION__); 1503 1504 if (edge_port == NULL) 1505 return -ENODEV; 1506 if (edge_port->closePending == TRUE) 1507 return -ENODEV; 1508 1509 dbg("%s - port %d", __FUNCTION__, port->number); 1510 1511 if (!edge_port->open) { 1512 dbg("%s - port not opened", __FUNCTION__); 1513 return -EINVAL; 1514 } 1515 1516 // total of both buffers is still txCredit 1517 room = edge_port->txCredits - edge_port->txfifo.count; 1518 1519 dbg("%s - returns %d", __FUNCTION__, room); 1520 return room; 1521} 1522 1523 1524/***************************************************************************** 1525 * edge_chars_in_buffer 1526 * this function is called by the tty driver when it wants to know how many 1527 * bytes of data we currently have outstanding in the port (data that has 1528 * been written, but hasn't made it out the port yet) 1529 * If successful, we return the number of bytes left to be written in the 1530 * system, 1531 * Otherwise we return a negative error number. 1532 *****************************************************************************/ 1533static int edge_chars_in_buffer (struct usb_serial_port *port) 1534{ 1535 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1536 int num_chars; 1537 1538 dbg("%s", __FUNCTION__); 1539 1540 if (edge_port == NULL) 1541 return -ENODEV; 1542 if (edge_port->closePending == TRUE) 1543 return -ENODEV; 1544 1545 if (!edge_port->open) { 1546 dbg("%s - port not opened", __FUNCTION__); 1547 return -EINVAL; 1548 } 1549 1550 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; 1551 if (num_chars) { 1552 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); 1553 } 1554 1555 return num_chars; 1556} 1557 1558 1559/***************************************************************************** 1560 * SerialThrottle 1561 * this function is called by the tty driver when it wants to stop the data 1562 * being read from the port. 1563 *****************************************************************************/ 1564static void edge_throttle (struct usb_serial_port *port) 1565{ 1566 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1567 struct tty_struct *tty; 1568 int status; 1569 1570 dbg("%s - port %d", __FUNCTION__, port->number); 1571 1572 if (edge_port == NULL) 1573 return; 1574 1575 if (!edge_port->open) { 1576 dbg("%s - port not opened", __FUNCTION__); 1577 return; 1578 } 1579 1580 tty = port->tty; 1581 if (!tty) { 1582 dbg ("%s - no tty available", __FUNCTION__); 1583 return; 1584 } 1585 1586 /* if we are implementing XON/XOFF, send the stop character */ 1587 if (I_IXOFF(tty)) { 1588 unsigned char stop_char = STOP_CHAR(tty); 1589 status = edge_write (port, 0, &stop_char, 1); 1590 if (status <= 0) { 1591 return; 1592 } 1593 } 1594 1595 /* if we are implementing RTS/CTS, toggle that line */ 1596 if (tty->termios->c_cflag & CRTSCTS) { 1597 edge_port->shadowMCR &= ~MCR_RTS; 1598 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1599 if (status != 0) { 1600 return; 1601 } 1602 } 1603 1604 return; 1605} 1606 1607 1608/***************************************************************************** 1609 * edge_unthrottle 1610 * this function is called by the tty driver when it wants to resume the data 1611 * being read from the port (called after SerialThrottle is called) 1612 *****************************************************************************/ 1613static void edge_unthrottle (struct usb_serial_port *port) 1614{ 1615 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1616 struct tty_struct *tty; 1617 int status; 1618 1619 dbg("%s - port %d", __FUNCTION__, port->number); 1620 1621 if (edge_port == NULL) 1622 return; 1623 1624 if (!edge_port->open) { 1625 dbg("%s - port not opened", __FUNCTION__); 1626 return; 1627 } 1628 1629 tty = port->tty; 1630 if (!tty) { 1631 dbg ("%s - no tty available", __FUNCTION__); 1632 return; 1633 } 1634 1635 /* if we are implementing XON/XOFF, send the start character */ 1636 if (I_IXOFF(tty)) { 1637 unsigned char start_char = START_CHAR(tty); 1638 status = edge_write (port, 0, &start_char, 1); 1639 if (status <= 0) { 1640 return; 1641 } 1642 } 1643 1644 /* if we are implementing RTS/CTS, toggle that line */ 1645 if (tty->termios->c_cflag & CRTSCTS) { 1646 edge_port->shadowMCR |= MCR_RTS; 1647 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1648 if (status != 0) { 1649 return; 1650 } 1651 } 1652 1653 return; 1654} 1655 1656 1657/***************************************************************************** 1658 * SerialSetTermios 1659 * this function is called by the tty driver when it wants to change the termios structure 1660 *****************************************************************************/ 1661static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios) 1662{ 1663 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1664 struct tty_struct *tty = port->tty; 1665 unsigned int cflag; 1666 1667 if (!port->tty || !port->tty->termios) { 1668 dbg ("%s - no tty or termios", __FUNCTION__); 1669 return; 1670 } 1671 1672 cflag = tty->termios->c_cflag; 1673 /* check that they really want us to change something */ 1674 if (old_termios) { 1675 if ((cflag == old_termios->c_cflag) && 1676 (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { 1677 dbg("%s - nothing to change", __FUNCTION__); 1678 return; 1679 } 1680 } 1681 1682 dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 1683 tty->termios->c_cflag, 1684 RELEVANT_IFLAG(tty->termios->c_iflag)); 1685 if (old_termios) { 1686 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, 1687 old_termios->c_cflag, 1688 RELEVANT_IFLAG(old_termios->c_iflag)); 1689 } 1690 1691 dbg("%s - port %d", __FUNCTION__, port->number); 1692 1693 if (edge_port == NULL) 1694 return; 1695 1696 if (!edge_port->open) { 1697 dbg("%s - port not opened", __FUNCTION__); 1698 return; 1699 } 1700 1701 /* change the port settings to the new ones specified */ 1702 change_port_settings (edge_port, old_termios); 1703 1704 return; 1705} 1706 1707 1708/***************************************************************************** 1709 * get_lsr_info - get line status register info 1710 * 1711 * Purpose: Let user call ioctl() to get info when the UART physically 1712 * is emptied. On bus types like RS485, the transmitter must 1713 * release the bus after transmitting. This must be done when 1714 * the transmit shift register is empty, not be done when the 1715 * transmit holding register is empty. This functionality 1716 * allows an RS485 driver to be written in user space. 1717 *****************************************************************************/ 1718static int get_lsr_info(struct edgeport_port *edge_port, unsigned int *value) 1719{ 1720 unsigned int result = 0; 1721 1722 if (edge_port->maxTxCredits == edge_port->txCredits && 1723 edge_port->txfifo.count == 0) { 1724 dbg("%s -- Empty", __FUNCTION__); 1725 result = TIOCSER_TEMT; 1726 } 1727 1728 if (copy_to_user(value, &result, sizeof(int))) 1729 return -EFAULT; 1730 return 0; 1731} 1732 1733static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int *value) 1734{ 1735 unsigned int result = 0; 1736 struct tty_struct *tty = edge_port->port->tty; 1737 1738 if (!tty) 1739 return -ENOIOCTLCMD; 1740 1741 result = tty->read_cnt; 1742 1743 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result); 1744 if (copy_to_user(value, &result, sizeof(int))) 1745 return -EFAULT; 1746 //return 0; 1747 return -ENOIOCTLCMD; 1748} 1749 1750static int set_modem_info(struct edgeport_port *edge_port, unsigned int cmd, unsigned int *value) 1751{ 1752 unsigned int mcr = edge_port->shadowMCR; 1753 unsigned int arg; 1754 1755 if (copy_from_user(&arg, value, sizeof(int))) 1756 return -EFAULT; 1757 1758 switch (cmd) { 1759 case TIOCMBIS: 1760 if (arg & TIOCM_RTS) 1761 mcr |= MCR_RTS; 1762 if (arg & TIOCM_DTR) 1763 mcr |= MCR_DTR; 1764 if (arg & TIOCM_LOOP) 1765 mcr |= MCR_LOOPBACK; 1766 break; 1767 1768 case TIOCMBIC: 1769 if (arg & TIOCM_RTS) 1770 mcr &= ~MCR_RTS; 1771 if (arg & TIOCM_DTR) 1772 mcr &= ~MCR_DTR; 1773 if (arg & TIOCM_LOOP) 1774 mcr &= ~MCR_LOOPBACK; 1775 break; 1776 1777 case TIOCMSET: 1778 /* turn off the RTS and DTR and LOOPBACK 1779 * and then only turn on what was asked to */ 1780 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 1781 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 1782 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 1783 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 1784 break; 1785 } 1786 1787 edge_port->shadowMCR = mcr; 1788 1789 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1790 1791 return 0; 1792} 1793 1794static int get_modem_info(struct edgeport_port *edge_port, unsigned int *value) 1795{ 1796 unsigned int result = 0; 1797 unsigned int msr = edge_port->shadowMSR; 1798 unsigned int mcr = edge_port->shadowMCR; 1799 1800 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1801 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1802 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1803 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1804 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1805 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1806 1807 1808 dbg("%s -- %x", __FUNCTION__, result); 1809 1810 if (copy_to_user(value, &result, sizeof(int))) 1811 return -EFAULT; 1812 return 0; 1813} 1814 1815 1816 1817static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct * retinfo) 1818{ 1819 struct serial_struct tmp; 1820 1821 if (!retinfo) 1822 return -EFAULT; 1823 1824 memset(&tmp, 0, sizeof(tmp)); 1825 1826 tmp.type = PORT_16550A; 1827 tmp.line = edge_port->port->serial->minor; 1828 tmp.port = edge_port->port->number; 1829 tmp.irq = 0; 1830 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1831 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1832 tmp.baud_base = 9600; 1833 tmp.close_delay = 5*HZ; 1834 tmp.closing_wait = 30*HZ; 1835// tmp.custom_divisor = state->custom_divisor; 1836// tmp.hub6 = state->hub6; 1837// tmp.io_type = state->io_type; 1838 1839 1840 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1841 return -EFAULT; 1842 return 0; 1843} 1844 1845 1846 1847/***************************************************************************** 1848 * SerialIoctl 1849 * this function handles any ioctl calls to the driver 1850 *****************************************************************************/ 1851static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 1852{ 1853 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1854 struct async_icount cnow; 1855 struct async_icount cprev; 1856 struct serial_icounter_struct icount; 1857 1858 1859 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); 1860 1861 switch (cmd) { 1862 // return number of bytes available 1863 case TIOCINQ: 1864 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); 1865 return get_number_bytes_avail(edge_port, (unsigned int *) arg); 1866 break; 1867 1868 case TIOCSERGETLSR: 1869 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); 1870 return get_lsr_info(edge_port, (unsigned int *) arg); 1871 return 0; 1872 1873 case TIOCMBIS: 1874 case TIOCMBIC: 1875 case TIOCMSET: 1876 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, port->number); 1877 return set_modem_info(edge_port, cmd, (unsigned int *) arg); 1878 1879 case TIOCMGET: 1880 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); 1881 return get_modem_info(edge_port, (unsigned int *) arg); 1882 1883 case TIOCGSERIAL: 1884 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); 1885 return get_serial_info(edge_port, (struct serial_struct *) arg); 1886 1887 case TIOCSSERIAL: 1888 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); 1889 break; 1890 1891 case TIOCMIWAIT: 1892 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 1893 cprev = edge_port->icount; 1894 while (1) { 1895 interruptible_sleep_on(&edge_port->delta_msr_wait); 1896 /* see if a signal did it */ 1897 if (signal_pending(current)) 1898 return -ERESTARTSYS; 1899 cnow = edge_port->icount; 1900 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1901 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1902 return -EIO; /* no change => error */ 1903 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1904 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1905 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1906 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 1907 return 0; 1908 } 1909 cprev = cnow; 1910 } 1911 /* NOTREACHED */ 1912 break; 1913 1914 case TIOCGICOUNT: 1915 cnow = edge_port->icount; 1916 icount.cts = cnow.cts; 1917 icount.dsr = cnow.dsr; 1918 icount.rng = cnow.rng; 1919 icount.dcd = cnow.dcd; 1920 icount.rx = cnow.rx; 1921 icount.tx = cnow.tx; 1922 icount.frame = cnow.frame; 1923 icount.overrun = cnow.overrun; 1924 icount.parity = cnow.parity; 1925 icount.brk = cnow.brk; 1926 icount.buf_overrun = cnow.buf_overrun; 1927 1928 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx ); 1929 if (copy_to_user((void *)arg, &icount, sizeof(icount))) 1930 return -EFAULT; 1931 return 0; 1932 } 1933 1934 return -ENOIOCTLCMD; 1935} 1936 1937 1938/***************************************************************************** 1939 * SerialBreak 1940 * this function sends a break to the port 1941 *****************************************************************************/ 1942static void edge_break (struct usb_serial_port *port, int break_state) 1943{ 1944 struct edgeport_port *edge_port = (struct edgeport_port *)(port->private); 1945 int status; 1946 1947 /* flush and chase */ 1948 edge_port->chaseResponsePending = TRUE; 1949 1950 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1951 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1952 if (status == 0) { 1953 // block until chase finished 1954 block_until_chase_response(edge_port); 1955 } else { 1956 edge_port->chaseResponsePending = FALSE; 1957 } 1958 1959 if (break_state == -1) { 1960 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__); 1961 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0); 1962 } else { 1963 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__); 1964 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0); 1965 } 1966 if (status) { 1967 dbg("%s - error sending break set/clear command.", __FUNCTION__); 1968 } 1969 1970 return; 1971} 1972 1973 1974/***************************************************************************** 1975 * process_rcvd_data 1976 * this function handles the data received on the bulk in pipe. 1977 *****************************************************************************/ 1978static int process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength) 1979{ 1980 struct usb_serial_port *port; 1981 struct edgeport_port *edge_port; 1982 struct tty_struct *tty; 1983 __u16 lastBufferLength; 1984 __u16 rxLen; 1985 int i; 1986 1987 dbg("%s", __FUNCTION__); 1988 1989 lastBufferLength = bufferLength + 1; 1990 1991 while (bufferLength > 0) { 1992 /* failsafe incase we get a message that we don't understand */ 1993 if (lastBufferLength == bufferLength) { 1994 dbg("%s - stuck in loop, exiting it.", __FUNCTION__); 1995 break; 1996 } 1997 lastBufferLength = bufferLength; 1998 1999 switch (edge_serial->rxState) { 2000 case EXPECT_HDR1: 2001 edge_serial->rxHeader1 = *buffer; 2002 ++buffer; 2003 --bufferLength; 2004 2005 if (bufferLength == 0) { 2006 edge_serial->rxState = EXPECT_HDR2; 2007 break; 2008 } 2009 /* otherwise, drop on through */ 2010 2011 case EXPECT_HDR2: 2012 edge_serial->rxHeader2 = *buffer; 2013 ++buffer; 2014 --bufferLength; 2015 2016 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2); 2017 2018 // Process depending on whether this header is 2019 // data or status 2020 2021 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 2022 // Decode this status header and goto EXPECT_HDR1 (if we 2023 // can process the status with only 2 bytes), or goto 2024 // EXPECT_HDR3 to get the third byte. 2025 2026 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 2027 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1); 2028 2029 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) { 2030 // This status needs additional bytes. Save what we have 2031 // and then wait for more data. 2032 edge_serial->rxStatusParam = edge_serial->rxHeader2; 2033 2034 edge_serial->rxState = EXPECT_HDR3; 2035 break; 2036 } 2037 2038 // We have all the header bytes, process the status now 2039 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0); 2040 2041 edge_serial->rxState = EXPECT_HDR1; 2042 break; 2043 } else { 2044 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 2045 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2); 2046 2047 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining); 2048 2049 //ASSERT( DevExt->RxPort < DevExt->NumPorts ); 2050 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH ); 2051 2052 if (bufferLength == 0 ) { 2053 edge_serial->rxState = EXPECT_DATA; 2054 break; 2055 } 2056 // Else, drop through 2057 } 2058 2059 case EXPECT_DATA: // Expect data 2060 2061 if (bufferLength < edge_serial->rxBytesRemaining) { 2062 rxLen = bufferLength; 2063 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer 2064 } else { 2065 // BufLen >= RxBytesRemaining 2066 rxLen = edge_serial->rxBytesRemaining; 2067 edge_serial->rxState = EXPECT_HDR1; // Start another header next time 2068 } 2069 2070 bufferLength -= rxLen; 2071 edge_serial->rxBytesRemaining -= rxLen; 2072 2073 /* spit this data back into the tty driver if this port is open */ 2074 if (rxLen) { 2075 port = &edge_serial->serial->port[edge_serial->rxPort]; 2076 if (port_paranoia_check (port, __FUNCTION__) == 0) { 2077 edge_port = (struct edgeport_port *)port->private; 2078 if (edge_port->open) { 2079 tty = edge_port->port->tty; 2080 if (tty) { 2081 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort); 2082 for (i = 0; i < rxLen ; ++i) { 2083 /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */ 2084 if(tty->flip.count >= TTY_FLIPBUF_SIZE) { 2085 tty_flip_buffer_push(tty); 2086 } 2087 /* this doesn't actually push the data through unless tty->low_latency is set */ 2088 tty_insert_flip_char(tty, buffer[i], 0); 2089 } 2090 tty_flip_buffer_push(tty); 2091 } 2092 edge_port->icount.rx += rxLen; 2093 } 2094 } 2095 buffer += rxLen; 2096 } 2097 2098 break; 2099 2100 case EXPECT_HDR3: // Expect 3rd byte of status header 2101 edge_serial->rxHeader3 = *buffer; 2102 ++buffer; 2103 --bufferLength; 2104 2105 // We have all the header bytes, process the status now 2106 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3); 2107 edge_serial->rxState = EXPECT_HDR1; 2108 break; 2109 2110 } 2111 } 2112 2113 return 0; 2114} 2115 2116 2117/***************************************************************************** 2118 * process_rcvd_status 2119 * this function handles the any status messages received on the bulk in pipe. 2120 *****************************************************************************/ 2121static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3) 2122{ 2123 struct usb_serial_port *port; 2124 struct edgeport_port *edge_port; 2125 __u8 code = edge_serial->rxStatusCode; 2126 2127 /* switch the port pointer to the one being currently talked about */ 2128 port = &edge_serial->serial->port[edge_serial->rxPort]; 2129 if (port_paranoia_check (port, __FUNCTION__)) { 2130 return; 2131 } 2132 edge_port = (struct edgeport_port *)port->private; 2133 if (edge_port == NULL) { 2134 err("%s - edge_port == NULL for port %d", __FUNCTION__, edge_serial->rxPort); 2135 return; 2136 } 2137 2138 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort); 2139 2140 if (code == IOSP_EXT_STATUS) { 2141 switch (byte2) { 2142 case IOSP_EXT_STATUS_CHASE_RSP: 2143 // we want to do EXT status regardless of port open/closed 2144 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 ); 2145 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call 2146 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do. 2147 // Also, we currently clear flag and close the port regardless of content of above's Byte3. 2148 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport, 2149 // like wait longer in block_until_chase_response, but for now we don't. 2150 edge_port->chaseResponsePending = FALSE; 2151 wake_up_interruptible (&edge_port->wait_chase); 2152 return; 2153 2154 case IOSP_EXT_STATUS_RX_CHECK_RSP: 2155 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 ); 2156 //Port->RxCheckRsp = TRUE; 2157 return; 2158 } 2159 } 2160 2161 if (code == IOSP_STATUS_OPEN_RSP) { 2162 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 2163 edge_port->maxTxCredits = edge_port->txCredits; 2164 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits); 2165 handle_new_msr (edge_port, byte2); 2166 2167 /* send the current line settings to the port so we are in sync with any further termios calls */ 2168 if (edge_port->port->tty) 2169 change_port_settings (edge_port, edge_port->port->tty->termios); 2170 2171 /* we have completed the open */ 2172 edge_port->openPending = FALSE; 2173 edge_port->open = TRUE; 2174 wake_up_interruptible(&edge_port->wait_open); 2175 return; 2176 } 2177 2178 // If port is closed, silently discard all rcvd status. We can 2179 // have cases where buffered status is received AFTER the close 2180 // port command is sent to the Edgeport. 2181 if ((!edge_port->open ) || (edge_port->closePending)) { 2182 return; 2183 } 2184 2185 switch (code) { 2186 // Not currently sent by Edgeport 2187 case IOSP_STATUS_LSR: 2188 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2189 handle_new_lsr (edge_port, FALSE, byte2, 0); 2190 break; 2191 2192 case IOSP_STATUS_LSR_DATA: 2193 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2194 // byte2 is LSR Register 2195 // byte3 is broken data byte 2196 handle_new_lsr (edge_port, TRUE, byte2, byte3); 2197 break; 2198 // 2199 // case IOSP_EXT_4_STATUS: 2200 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2201 // break; 2202 // 2203 case IOSP_STATUS_MSR: 2204 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2205 2206 // Process this new modem status and generate appropriate 2207 // events, etc, based on the new status. This routine 2208 // also saves the MSR in Port->ShadowMsr. 2209 handle_new_msr(edge_port, byte2); 2210 break; 2211 2212 default: 2213 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code); 2214 break; 2215 } 2216 2217 return; 2218} 2219 2220 2221/***************************************************************************** 2222 * handle_new_msr 2223 * this function handles any change to the msr register for a port. 2224 *****************************************************************************/ 2225static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2226{ 2227 struct async_icount *icount; 2228 2229 dbg("%s %02x", __FUNCTION__, newMsr); 2230 2231 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2232 icount = &edge_port->icount; 2233 2234 /* update input line counters */ 2235 if (newMsr & EDGEPORT_MSR_DELTA_CTS) { 2236 icount->cts++; 2237 } 2238 if (newMsr & EDGEPORT_MSR_DELTA_DSR) { 2239 icount->dsr++; 2240 } 2241 if (newMsr & EDGEPORT_MSR_DELTA_CD) { 2242 icount->dcd++; 2243 } 2244 if (newMsr & EDGEPORT_MSR_DELTA_RI) { 2245 icount->rng++; 2246 } 2247 wake_up_interruptible(&edge_port->delta_msr_wait); 2248 } 2249 2250 /* Save the new modem status */ 2251 edge_port->shadowMSR = newMsr & 0xf0; 2252 2253 return; 2254} 2255 2256 2257/***************************************************************************** 2258 * handle_new_lsr 2259 * this function handles any change to the lsr register for a port. 2260 *****************************************************************************/ 2261static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data) 2262{ 2263 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2264 struct async_icount *icount; 2265 2266 dbg("%s - %02x", __FUNCTION__, newLsr); 2267 2268 edge_port->shadowLSR = lsr; 2269 2270 if (newLsr & LSR_BREAK) { 2271 // 2272 // Parity and Framing errors only count if they 2273 // occur exclusive of a break being 2274 // received. 2275 // 2276 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2277 } 2278 2279 /* Place LSR data byte into Rx buffer */ 2280 if (lsrData && edge_port->port->tty) { 2281 tty_insert_flip_char(edge_port->port->tty, data, 0); 2282 tty_flip_buffer_push(edge_port->port->tty); 2283 } 2284 2285 /* update input line counters */ 2286 icount = &edge_port->icount; 2287 if (newLsr & LSR_BREAK) { 2288 icount->brk++; 2289 } 2290 if (newLsr & LSR_OVER_ERR) { 2291 icount->overrun++; 2292 } 2293 if (newLsr & LSR_PAR_ERR) { 2294 icount->parity++; 2295 } 2296 if (newLsr & LSR_FRM_ERR) { 2297 icount->frame++; 2298 } 2299 2300 return; 2301} 2302 2303 2304/**************************************************************************** 2305 * sram_write 2306 * writes a number of bytes to the Edgeport device's sram starting at the 2307 * given address. 2308 * If successful returns the number of bytes written, otherwise it returns 2309 * a negative error number of the problem. 2310 ****************************************************************************/ 2311static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2312{ 2313 int result; 2314 __u16 current_length; 2315 unsigned char *transfer_buffer; 2316 2317 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2318 2319 transfer_buffer = kmalloc (64, GFP_KERNEL); 2320 if (!transfer_buffer) { 2321 err("%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2322 return -ENOMEM; 2323 } 2324 2325 /* need to split these writes up into 64 byte chunks */ 2326 result = 0; 2327 while (length > 0) { 2328 if (length > 64) { 2329 current_length = 64; 2330 } else { 2331 current_length = length; 2332 } 2333// dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2334 memcpy (transfer_buffer, data, current_length); 2335 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM, 2336 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2337 if (result < 0) 2338 break; 2339 length -= current_length; 2340 addr += current_length; 2341 data += current_length; 2342 } 2343 2344 kfree (transfer_buffer); 2345 return result; 2346} 2347 2348 2349/**************************************************************************** 2350 * rom_write 2351 * writes a number of bytes to the Edgeport device's ROM starting at the 2352 * given address. 2353 * If successful returns the number of bytes written, otherwise it returns 2354 * a negative error number of the problem. 2355 ****************************************************************************/ 2356static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2357{ 2358 int result; 2359 __u16 current_length; 2360 unsigned char *transfer_buffer; 2361 2362// dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2363 2364 transfer_buffer = kmalloc (64, GFP_KERNEL); 2365 if (!transfer_buffer) { 2366 err("%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2367 return -ENOMEM; 2368 } 2369 2370 /* need to split these writes up into 64 byte chunks */ 2371 result = 0; 2372 while (length > 0) { 2373 if (length > 64) { 2374 current_length = 64; 2375 } else { 2376 current_length = length; 2377 } 2378// dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2379 memcpy (transfer_buffer, data, current_length); 2380 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM, 2381 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2382 if (result < 0) 2383 break; 2384 length -= current_length; 2385 addr += current_length; 2386 data += current_length; 2387 } 2388 2389 kfree (transfer_buffer); 2390 return result; 2391} 2392 2393 2394/**************************************************************************** 2395 * rom_read 2396 * reads a number of bytes from the Edgeport device starting at the given 2397 * address. 2398 * If successful returns the number of bytes read, otherwise it returns 2399 * a negative error number of the problem. 2400 ****************************************************************************/ 2401static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2402{ 2403 int result; 2404 __u16 current_length; 2405 unsigned char *transfer_buffer; 2406 2407 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2408 2409 transfer_buffer = kmalloc (64, GFP_KERNEL); 2410 if (!transfer_buffer) { 2411 err("%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2412 return -ENOMEM; 2413 } 2414 2415 /* need to split these reads up into 64 byte chunks */ 2416 result = 0; 2417 while (length > 0) { 2418 if (length > 64) { 2419 current_length = 64; 2420 } else { 2421 current_length = length; 2422 } 2423// dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2424 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM, 2425 0xC0, addr, extAddr, transfer_buffer, current_length, 300); 2426 if (result < 0) 2427 break; 2428 memcpy (data, transfer_buffer, current_length); 2429 length -= current_length; 2430 addr += current_length; 2431 data += current_length; 2432 } 2433 2434 kfree (transfer_buffer); 2435 return result; 2436} 2437 2438 2439/**************************************************************************** 2440 * send_iosp_ext_cmd 2441 * Is used to send a IOSP message to the Edgeport device 2442 ****************************************************************************/ 2443static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param) 2444{ 2445 unsigned char *buffer; 2446 unsigned char *currentCommand; 2447 int length = 0; 2448 int status = 0; 2449 2450 dbg("%s - %d, %d", __FUNCTION__, command, param); 2451 2452 buffer = kmalloc (10, GFP_ATOMIC); 2453 if (!buffer) { 2454 err("%s - kmalloc(%d) failed.\n", __FUNCTION__, 10); 2455 return -ENOMEM; 2456 } 2457 2458 currentCommand = buffer; 2459 2460 MAKE_CMD_EXT_CMD (¤tCommand, &length, 2461 edge_port->port->number - edge_port->port->serial->minor, 2462 command, param); 2463 2464 status = write_cmd_usb (edge_port, buffer, length); 2465 if (status) { 2466 /* something bad happened, let's free up the memory */ 2467 kfree(buffer); 2468 } 2469 2470 return status; 2471} 2472 2473 2474/***************************************************************************** 2475 * write_cmd_usb 2476 * this function writes the given buffer out to the bulk write endpoint. 2477 *****************************************************************************/ 2478static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length) 2479{ 2480 struct edgeport_serial *edge_serial = (struct edgeport_serial *)edge_port->port->serial->private; 2481 int status = 0; 2482 struct urb *urb; 2483 int timeout; 2484 2485 usb_serial_debug_data (__FILE__, __FUNCTION__, length, buffer); 2486 2487 /* Allocate our next urb */ 2488 urb = usb_alloc_urb (0); 2489 if (!urb) 2490 return -ENOMEM; 2491 2492 CmdUrbs++; 2493 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 2494 2495 FILL_BULK_URB (urb, edge_serial->serial->dev, 2496 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 2497 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2498 2499 /* set the USB_BULK_QUEUE flag so that we can shove a bunch of urbs at once down the pipe */ 2500 urb->transfer_flags |= USB_QUEUE_BULK; 2501 2502 edge_port->commandPending = TRUE; 2503 status = usb_submit_urb(urb); 2504 2505 if (status) { 2506 /* something went wrong */ 2507 dbg("%s - usb_submit_urb(write bulk) failed", __FUNCTION__); 2508 usb_unlink_urb (urb); 2509 usb_free_urb (urb); 2510 return status; 2511 } 2512 2513 // wait for command to finish 2514 timeout = COMMAND_TIMEOUT; 2515#if 0 2516 while (timeout && edge_port->commandPending == TRUE) { 2517 timeout = interruptible_sleep_on_timeout (&edge_port->wait_command, timeout); 2518 } 2519 2520 if (edge_port->commandPending == TRUE) { 2521 /* command timed out */ 2522 dbg("%s - command timed out", __FUNCTION__); 2523 status = -EINVAL; 2524 } 2525#endif 2526 return status; 2527} 2528 2529 2530/***************************************************************************** 2531 * send_cmd_write_baud_rate 2532 * this function sends the proper command to change the baud rate of the 2533 * specified port. 2534 *****************************************************************************/ 2535static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate) 2536{ 2537 unsigned char *cmdBuffer; 2538 unsigned char *currCmd; 2539 int cmdLen = 0; 2540 int divisor; 2541 int status; 2542 unsigned char number = edge_port->port->number - edge_port->port->serial->minor; 2543 2544 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); 2545 2546 status = calc_baud_rate_divisor (baudRate, &divisor); 2547 if (status) { 2548 err("%s - bad baud rate", __FUNCTION__); 2549 return status; 2550 } 2551 2552 // Alloc memory for the string of commands. 2553 cmdBuffer = kmalloc (0x100, GFP_ATOMIC); 2554 if (!cmdBuffer) { 2555 err("%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); 2556 return -ENOMEM; 2557 } 2558 currCmd = cmdBuffer; 2559 2560 // Enable access to divisor latch 2561 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); 2562 2563 // Write the divisor itself 2564 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); 2565 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); 2566 2567 // Restore original value to disable access to divisor latch 2568 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); 2569 2570 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); 2571 if (status) { 2572 /* something bad happened, let's free up the memory */ 2573 kfree (cmdBuffer); 2574 } 2575 2576 return status; 2577} 2578 2579 2580/***************************************************************************** 2581 * calc_baud_rate_divisor 2582 * this function calculates the proper baud rate divisor for the specified 2583 * baud rate. 2584 *****************************************************************************/ 2585static int calc_baud_rate_divisor (int baudrate, int *divisor) 2586{ 2587 int i; 2588 __u16 custom; 2589 __u16 round1; 2590 __u16 round; 2591 2592 2593 dbg("%s - %d", __FUNCTION__, baudrate); 2594 2595 for (i = 0; i < NUM_ENTRIES(divisor_table); i++) { 2596 if ( divisor_table[i].BaudRate == baudrate ) { 2597 *divisor = divisor_table[i].Divisor; 2598 return 0; 2599 } 2600 } 2601 2602 // We have tried all of the standard baud rates 2603 // lets try to calculate the divisor for this baud rate 2604 // Make sure the baud rate is reasonable 2605 if (baudrate < 230400) { 2606 // get divisor 2607 custom = (__u16)(230400L / baudrate); 2608 2609 // Check for round off 2610 round1 = (__u16)(2304000L / baudrate); 2611 round = (__u16)(round1 - (custom * 10)); 2612 if (round > 4) { 2613 custom++; 2614 } 2615 *divisor = custom; 2616 2617 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); 2618 return 0; 2619 } 2620 2621 return -1; 2622} 2623 2624 2625/***************************************************************************** 2626 * send_cmd_write_uart_register 2627 * this function builds up a uart register message and sends to to the device. 2628 *****************************************************************************/ 2629static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) 2630{ 2631 unsigned char *cmdBuffer; 2632 unsigned char *currCmd; 2633 unsigned long cmdLen = 0; 2634 int status; 2635 2636 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); 2637 2638 // Alloc memory for the string of commands. 2639 cmdBuffer = kmalloc (0x10, GFP_ATOMIC); 2640 if (cmdBuffer == NULL ) { 2641 return -ENOMEM; 2642 } 2643 2644 currCmd = cmdBuffer; 2645 2646 // Build a cmd in the buffer to write the given register 2647 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, 2648 edge_port->port->number - edge_port->port->serial->minor, 2649 regNum, regValue); 2650 2651 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2652 if (status) { 2653 /* something bad happened, let's free up the memory */ 2654 kfree (cmdBuffer); 2655 } 2656 2657 return status; 2658} 2659 2660 2661/***************************************************************************** 2662 * change_port_settings 2663 * This routine is called to set the UART on the device to match the specified 2664 * new settings. 2665 *****************************************************************************/ 2666static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios) 2667{ 2668 struct tty_struct *tty; 2669 int baud; 2670 unsigned cflag; 2671 __u8 mask = 0xff; 2672 __u8 lData; 2673 __u8 lParity; 2674 __u8 lStop; 2675 __u8 rxFlow; 2676 __u8 txFlow; 2677 int status; 2678 2679 dbg("%s - port %d", __FUNCTION__, edge_port->port->number); 2680 2681 if ((!edge_port->open) && 2682 (!edge_port->openPending)) { 2683 dbg("%s - port not opened", __FUNCTION__); 2684 return; 2685 } 2686 2687 tty = edge_port->port->tty; 2688 if ((!tty) || 2689 (!tty->termios)) { 2690 dbg("%s - no tty structures", __FUNCTION__); 2691 return; 2692 } 2693 2694 cflag = tty->termios->c_cflag; 2695 2696 switch (cflag & CSIZE) { 2697 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; 2698 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; 2699 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; 2700 default: 2701 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; 2702 } 2703 2704 lParity = LCR_PAR_NONE; 2705 if (cflag & PARENB) { 2706 if (cflag & PARODD) { 2707 lParity = LCR_PAR_ODD; 2708 dbg("%s - parity = odd", __FUNCTION__); 2709 } else { 2710 lParity = LCR_PAR_EVEN; 2711 dbg("%s - parity = even", __FUNCTION__); 2712 } 2713 } else { 2714 dbg("%s - parity = none", __FUNCTION__); 2715 } 2716 2717 if (cflag & CSTOPB) { 2718 lStop = LCR_STOP_2; 2719 dbg("%s - stop bits = 2", __FUNCTION__); 2720 } else { 2721 lStop = LCR_STOP_1; 2722 dbg("%s - stop bits = 1", __FUNCTION__); 2723 } 2724 2725 /* figure out the flow control settings */ 2726 rxFlow = txFlow = 0x00; 2727 if (cflag & CRTSCTS) { 2728 rxFlow |= IOSP_RX_FLOW_RTS; 2729 txFlow |= IOSP_TX_FLOW_CTS; 2730 dbg("%s - RTS/CTS is enabled", __FUNCTION__); 2731 } else { 2732 dbg("%s - RTS/CTS is disabled", __FUNCTION__); 2733 } 2734 2735 /* if we are implementing XON/XOFF, set the start and stop character in the device */ 2736 if (I_IXOFF(tty) || I_IXON(tty)) { 2737 unsigned char stop_char = STOP_CHAR(tty); 2738 unsigned char start_char = START_CHAR(tty); 2739 2740 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char); 2741 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); 2742 2743 /* if we are implementing INBOUND XON/XOFF */ 2744 if (I_IXOFF(tty)) { 2745 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2746 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2747 } else { 2748 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); 2749 } 2750 2751 /* if we are implementing OUTBOUND XON/XOFF */ 2752 if (I_IXON(tty)) { 2753 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2754 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2755 } else { 2756 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); 2757 } 2758 } 2759 2760 /* Set flow control to the configured value */ 2761 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2762 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2763 2764 2765 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2766 edge_port->shadowLCR |= (lData | lParity | lStop); 2767 2768 edge_port->validDataMask = mask; 2769 2770 /* Send the updated LCR value to the EdgePort */ 2771 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); 2772 if (status != 0) { 2773 return; 2774 } 2775 2776 /* set up the MCR register and send it to the EdgePort */ 2777 edge_port->shadowMCR = MCR_MASTER_IE; 2778 if (cflag & CBAUD) { 2779 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2780 } 2781 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 2782 if (status != 0) { 2783 return; 2784 } 2785 2786 /* Determine divisor based on baud rate */ 2787 baud = tty_get_baud_rate(tty); 2788 if (!baud) { 2789 /* pick a default, any default... */ 2790 baud = 9600; 2791 } 2792 2793 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2794 status = send_cmd_write_baud_rate (edge_port, baud); 2795 2796 return; 2797} 2798 2799 2800/**************************************************************************** 2801 * unicode_to_ascii 2802 * Turns a string from Unicode into ASCII. 2803 * Doesn't do a good job with any characters that are outside the normal 2804 * ASCII range, but it's only for debugging... 2805 * NOTE: expects the unicode in LE format 2806 ****************************************************************************/ 2807static void unicode_to_ascii (char *string, short *unicode, int unicode_size) 2808{ 2809 int i; 2810 for (i = 0; i < unicode_size; ++i) { 2811 string[i] = (char)(le16_to_cpu(unicode[i])); 2812 } 2813 string[unicode_size] = 0x00; 2814} 2815 2816 2817/**************************************************************************** 2818 * get_manufacturing_desc 2819 * reads in the manufacturing descriptor and stores it into the serial 2820 * structure. 2821 ****************************************************************************/ 2822static void get_manufacturing_desc (struct edgeport_serial *edge_serial) 2823{ 2824 int response; 2825 2826 dbg("getting manufacturer descriptor"); 2827 2828 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2829 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, 2830 (__u8 *)(&edge_serial->manuf_descriptor)); 2831 2832 if (response < 1) { 2833 err("error in getting manufacturer descriptor"); 2834 } else { 2835 char string[30]; 2836 dbg("**Manufacturer Descriptor"); 2837 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); 2838 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); 2839 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); 2840 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); 2841 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); 2842 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); 2843 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1); 2844 dbg(" SerialNumber: %s", string); 2845 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1); 2846 dbg(" AssemblyNumber: %s", string); 2847 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1); 2848 dbg(" OemAssyNumber: %s", string); 2849 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); 2850 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); 2851 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); 2852 } 2853} 2854 2855 2856/**************************************************************************** 2857 * get_boot_desc 2858 * reads in the bootloader descriptor and stores it into the serial 2859 * structure. 2860 ****************************************************************************/ 2861static void get_boot_desc (struct edgeport_serial *edge_serial) 2862{ 2863 int response; 2864 2865 dbg("getting boot descriptor"); 2866 2867 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2868 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, 2869 (__u8 *)(&edge_serial->boot_descriptor)); 2870 2871 if (response < 1) { 2872 err("error in getting boot descriptor"); 2873 } else { 2874 dbg("**Boot Descriptor:"); 2875 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2876 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); 2877 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); 2878 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2879 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2880 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); 2881 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); 2882 } 2883} 2884 2885 2886/**************************************************************************** 2887 * load_application_firmware 2888 * This is called to load the application firmware to the device 2889 ****************************************************************************/ 2890static void load_application_firmware (struct edgeport_serial *edge_serial) 2891{ 2892 struct edge_firmware_image_record *record; 2893 unsigned char *firmware; 2894 unsigned char *FirmwareImage; 2895 int ImageSize; 2896 int response; 2897 2898 2899 switch (edge_serial->product_info.iDownloadFile) { 2900 case EDGE_DOWNLOAD_FILE_I930: 2901 dbg("downloading firmware version (930) %d.%d.%d", 2902 OperationalCodeImageVersion_GEN1.MajorVersion, 2903 OperationalCodeImageVersion_GEN1.MinorVersion, 2904 OperationalCodeImageVersion_GEN1.BuildNumber); 2905 firmware = &OperationalCodeImage_GEN1[0]; 2906 FirmwareImage = &OperationalCodeImage_GEN1[0]; 2907 ImageSize = sizeof(OperationalCodeImage_GEN1); 2908 break; 2909 2910 case EDGE_DOWNLOAD_FILE_80251: 2911 dbg("downloading firmware version (80251) %d.%d.%d", 2912 OperationalCodeImageVersion_GEN2.MajorVersion, 2913 OperationalCodeImageVersion_GEN2.MinorVersion, 2914 OperationalCodeImageVersion_GEN2.BuildNumber); 2915 firmware = &OperationalCodeImage_GEN2[0]; 2916 FirmwareImage = &OperationalCodeImage_GEN2[0]; 2917 ImageSize = sizeof(OperationalCodeImage_GEN2); 2918 break; 2919 2920 case EDGE_DOWNLOAD_FILE_NONE: 2921 dbg ("No download file specified, skipping download\n"); 2922 return; 2923 2924 default: 2925 return; 2926 } 2927 2928 2929 for (;;) { 2930 record = (struct edge_firmware_image_record *)firmware; 2931 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 2932 if (response < 0) { 2933 err("sram_write failed (%x, %x, %d)", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), record->Len); 2934 break; 2935 } 2936 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 2937 if (firmware >= &FirmwareImage[ImageSize]) { 2938 break; 2939 } 2940 } 2941 2942 dbg("sending exec_dl_code"); 2943 response = usb_control_msg (edge_serial->serial->dev, 2944 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2945 USB_REQUEST_ION_EXEC_DL_CODE, 2946 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2947 2948 return; 2949} 2950 2951 2952 2953 2954/**************************************************************************** 2955 * edge_startup 2956 ****************************************************************************/ 2957static int edge_startup (struct usb_serial *serial) 2958{ 2959 struct edgeport_serial *edge_serial; 2960 struct edgeport_port *edge_port; 2961 struct usb_device *dev; 2962 int i; 2963 2964 dev = serial->dev; 2965 2966 /* create our private serial structure */ 2967 edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL); 2968 if (edge_serial == NULL) { 2969 err("%s - Out of memory", __FUNCTION__); 2970 return -ENOMEM; 2971 } 2972 memset (edge_serial, 0, sizeof(struct edgeport_serial)); 2973 edge_serial->serial = serial; 2974 serial->private = edge_serial; 2975 2976 /* get the name for the device from the device */ 2977 if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) { 2978 edge_serial->name[i-1] = ' '; 2979 } 2980 2981 get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]); 2982 2983 info("%s detected", edge_serial->name); 2984 2985 /* get the manufacturing descriptor for this device */ 2986 get_manufacturing_desc (edge_serial); 2987 2988 /* get the boot descriptor */ 2989 get_boot_desc (edge_serial); 2990 2991 get_product_info(edge_serial); 2992 2993 /* set the number of ports from the manufacturing description */ 2994 /* serial->num_ports = serial->product_info.NumPorts; */ 2995 if (edge_serial->product_info.NumPorts != serial->num_ports) { 2996 warn("%s - Device Reported %d serial ports vs core " 2997 "thinking we have %d ports, email greg@kroah.com this info.", 2998 __FUNCTION__, edge_serial->product_info.NumPorts, 2999 serial->num_ports); 3000 } 3001 3002 dbg("%s - time 1 %ld", __FUNCTION__, jiffies); 3003 3004 /* now load the application firmware into this device */ 3005 load_application_firmware (edge_serial); 3006 3007 dbg("%s - time 2 %ld", __FUNCTION__, jiffies); 3008 3009 /* Check current Edgeport EEPROM and update if necessary */ 3010 update_edgeport_E2PROM (edge_serial); 3011 3012 dbg("%s - time 3 %ld", __FUNCTION__, jiffies); 3013 3014 /* set the configuration to use #1 */ 3015// dbg("set_configuration 1"); 3016// usb_set_configuration (dev, 1); 3017 3018 /* we set up the pointers to the endpoints in the edge_open function, 3019 * as the structures aren't created yet. */ 3020 3021 /* set up our port private structures */ 3022 for (i = 0; i < serial->num_ports; ++i) { 3023 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); 3024 if (edge_port == NULL) { 3025 err("%s - Out of memory", __FUNCTION__); 3026 return -ENOMEM; 3027 } 3028 memset (edge_port, 0, sizeof(struct edgeport_port)); 3029 edge_port->port = &serial->port[i]; 3030 serial->port[i].private = edge_port; 3031 } 3032 3033 return 0; 3034} 3035 3036 3037 3038/**************************************************************************** 3039 * edge_shutdown 3040 * This function is called whenever the device is removed from the usb bus. 3041 ****************************************************************************/ 3042static void edge_shutdown (struct usb_serial *serial) 3043{ 3044 int i; 3045 3046 dbg("%s", __FUNCTION__); 3047 3048 /* stop reads and writes on all ports */ 3049 for (i=0; i < serial->num_ports; ++i) { 3050 kfree (serial->port[i].private); 3051 serial->port[i].private = NULL; 3052 } 3053 kfree (serial->private); 3054 serial->private = NULL; 3055} 3056 3057 3058/**************************************************************************** 3059 * edgeport_init 3060 * This is called by the module subsystem, or on startup to initialize us 3061 ****************************************************************************/ 3062int __init edgeport_init(void) 3063{ 3064 usb_serial_register (&edgeport_1port_device); 3065 usb_serial_register (&edgeport_2port_device); 3066 usb_serial_register (&edgeport_4port_device); 3067 usb_serial_register (&edgeport_8port_device); 3068 info(DRIVER_DESC " " DRIVER_VERSION); 3069 return 0; 3070} 3071 3072 3073 3074/**************************************************************************** 3075 * edgeport_exit 3076 * Called when the driver is about to be unloaded. 3077 ****************************************************************************/ 3078void __exit edgeport_exit (void) 3079{ 3080 usb_serial_deregister (&edgeport_1port_device); 3081 usb_serial_deregister (&edgeport_2port_device); 3082 usb_serial_deregister (&edgeport_4port_device); 3083 usb_serial_deregister (&edgeport_8port_device); 3084} 3085 3086module_init(edgeport_init); 3087module_exit(edgeport_exit); 3088 3089/* Module information */ 3090MODULE_AUTHOR( DRIVER_AUTHOR ); 3091MODULE_DESCRIPTION( DRIVER_DESC ); 3092MODULE_LICENSE("GPL"); 3093 3094MODULE_PARM(debug, "i"); 3095MODULE_PARM_DESC(debug, "Debug enabled or not"); 3096 3097