io_edgeport.c revision 194343d9364ea07c9f27c4505380a15a905e8a24
1/* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * Edgeport/4 14 * Edgeport/4t 15 * Edgeport/2 16 * Edgeport/4i 17 * Edgeport/2i 18 * Edgeport/421 19 * Edgeport/21 20 * Rapidport/4 21 * Edgeport/8 22 * Edgeport/2D8 23 * Edgeport/4D8 24 * Edgeport/8i 25 * 26 * For questions or problems with this driver, contact Inside Out 27 * Networks technical support, or Peter Berger <pberger@brimson.com>, 28 * or Al Borchers <alborchers@steinerpoint.com>. 29 * 30 */ 31 32#include <linux/kernel.h> 33#include <linux/jiffies.h> 34#include <linux/errno.h> 35#include <linux/init.h> 36#include <linux/slab.h> 37#include <linux/tty.h> 38#include <linux/tty_driver.h> 39#include <linux/tty_flip.h> 40#include <linux/module.h> 41#include <linux/spinlock.h> 42#include <linux/serial.h> 43#include <linux/ioctl.h> 44#include <linux/wait.h> 45#include <linux/firmware.h> 46#include <linux/ihex.h> 47#include <linux/uaccess.h> 48#include <linux/usb.h> 49#include <linux/usb/serial.h> 50#include "io_edgeport.h" 51#include "io_ionsp.h" /* info for the iosp messages */ 52#include "io_16654.h" /* 16654 UART defines */ 53 54/* 55 * Version Information 56 */ 57#define DRIVER_VERSION "v2.7" 58#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 59#define DRIVER_DESC "Edgeport USB Serial Driver" 60 61#define MAX_NAME_LEN 64 62 63#define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 64#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 65#define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 66 67/* receive port state */ 68enum RXSTATE { 69 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 70 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 73}; 74 75 76/* Transmit Fifo 77 * This Transmit queue is an extension of the edgeport Rx buffer. 78 * The maximum amount of data buffered in both the edgeport 79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 80 */ 81struct TxFifo { 82 unsigned int head; /* index to head pointer (write) */ 83 unsigned int tail; /* index to tail pointer (read) */ 84 unsigned int count; /* Bytes in queue */ 85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 86 unsigned char *fifo; /* allocated Buffer */ 87}; 88 89/* This structure holds all of the local port information */ 90struct edgeport_port { 91 __u16 txCredits; /* our current credits for this port */ 92 __u16 maxTxCredits; /* the max size of the port */ 93 94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 95 struct urb *write_urb; /* write URB for this port */ 96 bool write_in_progress; /* 'true' while a write URB is outstanding */ 97 spinlock_t ep_lock; 98 99 __u8 shadowLCR; /* last LCR value received */ 100 __u8 shadowMCR; /* last MCR value received */ 101 __u8 shadowMSR; /* last MSR value received */ 102 __u8 shadowLSR; /* last LSR value received */ 103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 105 __u8 validDataMask; 106 __u32 baudRate; 107 108 bool open; 109 bool openPending; 110 bool commandPending; 111 bool closePending; 112 bool chaseResponsePending; 113 114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 118 119 struct async_icount icount; 120 struct usb_serial_port *port; /* loop back to the owner of this object */ 121}; 122 123 124/* This structure holds all of the individual device information */ 125struct edgeport_serial { 126 char name[MAX_NAME_LEN+2]; /* string name of this device */ 127 128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 130 struct edgeport_product_info product_info; /* Product Info */ 131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 132 int is_epic; /* flag if EPiC device or not */ 133 134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 136 struct urb *interrupt_read_urb; /* our interrupt urb */ 137 138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 140 struct urb *read_urb; /* our bulk read urb */ 141 bool read_in_progress; 142 spinlock_t es_lock; 143 144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 145 146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 147 148 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 149 __u8 rxHeader1; /* receive header byte 1 */ 150 __u8 rxHeader2; /* receive header byte 2 */ 151 __u8 rxHeader3; /* receive header byte 3 */ 152 __u8 rxPort; /* the port that we are currently receiving data for */ 153 __u8 rxStatusCode; /* the receive status code */ 154 __u8 rxStatusParam; /* the receive status paramater */ 155 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 156 struct usb_serial *serial; /* loop back to the owner of this object */ 157}; 158 159/* baud rate information */ 160struct divisor_table_entry { 161 __u32 BaudRate; 162 __u16 Divisor; 163}; 164 165/* 166 * Define table of divisors for Rev A EdgePort/4 hardware 167 * These assume a 3.6864MHz crystal, the standard /16, and 168 * MCR.7 = 0. 169 */ 170 171static const struct divisor_table_entry divisor_table[] = { 172 { 50, 4608}, 173 { 75, 3072}, 174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 176 { 150, 1536}, 177 { 300, 768}, 178 { 600, 384}, 179 { 1200, 192}, 180 { 1800, 128}, 181 { 2400, 96}, 182 { 4800, 48}, 183 { 7200, 32}, 184 { 9600, 24}, 185 { 14400, 16}, 186 { 19200, 12}, 187 { 38400, 6}, 188 { 57600, 4}, 189 { 115200, 2}, 190 { 230400, 1}, 191}; 192 193/* local variables */ 194static int debug; 195 196static int low_latency = 1; /* tty low latency flag, on by default */ 197 198static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */ 199 200 201/* local function prototypes */ 202 203/* function prototypes for all URB callbacks */ 204static void edge_interrupt_callback(struct urb *urb); 205static void edge_bulk_in_callback(struct urb *urb); 206static void edge_bulk_out_data_callback(struct urb *urb); 207static void edge_bulk_out_cmd_callback(struct urb *urb); 208 209/* function prototypes for the usbserial callbacks */ 210static int edge_open(struct tty_struct *tty, struct usb_serial_port *port, 211 struct file *filp); 212static void edge_close(struct tty_struct *tty, struct usb_serial_port *port, 213 struct file *filp); 214static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 215 const unsigned char *buf, int count); 216static int edge_write_room(struct tty_struct *tty); 217static int edge_chars_in_buffer(struct tty_struct *tty); 218static void edge_throttle(struct tty_struct *tty); 219static void edge_unthrottle(struct tty_struct *tty); 220static void edge_set_termios(struct tty_struct *tty, 221 struct usb_serial_port *port, 222 struct ktermios *old_termios); 223static int edge_ioctl(struct tty_struct *tty, struct file *file, 224 unsigned int cmd, unsigned long arg); 225static void edge_break(struct tty_struct *tty, int break_state); 226static int edge_tiocmget(struct tty_struct *tty, struct file *file); 227static int edge_tiocmset(struct tty_struct *tty, struct file *file, 228 unsigned int set, unsigned int clear); 229static int edge_startup(struct usb_serial *serial); 230static void edge_shutdown(struct usb_serial *serial); 231 232#include "io_tables.h" /* all of the devices that this driver supports */ 233 234/* function prototypes for all of our local functions */ 235 236static void process_rcvd_data(struct edgeport_serial *edge_serial, 237 unsigned char *buffer, __u16 bufferLength); 238static void process_rcvd_status(struct edgeport_serial *edge_serial, 239 __u8 byte2, __u8 byte3); 240static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 241 unsigned char *data, int length); 242static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 243static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 244 __u8 lsr, __u8 data); 245static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 246 __u8 param); 247static int calc_baud_rate_divisor(int baud_rate, int *divisor); 248static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 249 int baudRate); 250static void change_port_settings(struct tty_struct *tty, 251 struct edgeport_port *edge_port, 252 struct ktermios *old_termios); 253static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 254 __u8 regNum, __u8 regValue); 255static int write_cmd_usb(struct edgeport_port *edge_port, 256 unsigned char *buffer, int writeLength); 257static void send_more_port_data(struct edgeport_serial *edge_serial, 258 struct edgeport_port *edge_port); 259 260static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 261 __u16 length, const __u8 *data); 262static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 263 __u16 length, __u8 *data); 264static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 265 __u16 length, const __u8 *data); 266static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 267static void get_boot_desc(struct edgeport_serial *edge_serial); 268static void load_application_firmware(struct edgeport_serial *edge_serial); 269 270static void unicode_to_ascii(char *string, int buflen, 271 __le16 *unicode, int unicode_size); 272 273 274/* ************************************************************************ */ 275/* ************************************************************************ */ 276/* ************************************************************************ */ 277/* ************************************************************************ */ 278 279/************************************************************************ 280 * * 281 * update_edgeport_E2PROM() Compare current versions of * 282 * Boot ROM and Manufacture * 283 * Descriptors with versions * 284 * embedded in this driver * 285 * * 286 ************************************************************************/ 287static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 288{ 289 __u32 BootCurVer; 290 __u32 BootNewVer; 291 __u8 BootMajorVersion; 292 __u8 BootMinorVersion; 293 __u16 BootBuildNumber; 294 __u32 Bootaddr; 295 const struct ihex_binrec *rec; 296 const struct firmware *fw; 297 const char *fw_name; 298 int response; 299 300 switch (edge_serial->product_info.iDownloadFile) { 301 case EDGE_DOWNLOAD_FILE_I930: 302 fw_name = "edgeport/boot.fw"; 303 break; 304 case EDGE_DOWNLOAD_FILE_80251: 305 fw_name = "edgeport/boot2.fw"; 306 break; 307 default: 308 return; 309 } 310 311 response = request_ihex_firmware(&fw, fw_name, 312 &edge_serial->serial->dev->dev); 313 if (response) { 314 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 315 fw_name, response); 316 return; 317 } 318 319 rec = (const struct ihex_binrec *)fw->data; 320 BootMajorVersion = rec->data[0]; 321 BootMinorVersion = rec->data[1]; 322 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 323 324 /* Check Boot Image Version */ 325 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 326 (edge_serial->boot_descriptor.MinorVersion << 16) + 327 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 328 329 BootNewVer = (BootMajorVersion << 24) + 330 (BootMinorVersion << 16) + 331 BootBuildNumber; 332 333 dbg("Current Boot Image version %d.%d.%d", 334 edge_serial->boot_descriptor.MajorVersion, 335 edge_serial->boot_descriptor.MinorVersion, 336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 337 338 339 if (BootNewVer > BootCurVer) { 340 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 341 edge_serial->boot_descriptor.MajorVersion, 342 edge_serial->boot_descriptor.MinorVersion, 343 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 344 BootMajorVersion, BootMinorVersion, BootBuildNumber); 345 346 dbg("Downloading new Boot Image"); 347 348 for (rec = ihex_next_binrec(rec); rec; 349 rec = ihex_next_binrec(rec)) { 350 Bootaddr = be32_to_cpu(rec->addr); 351 response = rom_write(edge_serial->serial, 352 Bootaddr >> 16, 353 Bootaddr & 0xFFFF, 354 be16_to_cpu(rec->len), 355 &rec->data[0]); 356 if (response < 0) { 357 dev_err(&edge_serial->serial->dev->dev, 358 "rom_write failed (%x, %x, %d)\n", 359 Bootaddr >> 16, Bootaddr & 0xFFFF, 360 be16_to_cpu(rec->len)); 361 break; 362 } 363 } 364 } else { 365 dbg("Boot Image -- already up to date"); 366 } 367 release_firmware(fw); 368} 369 370 371/************************************************************************ 372 * * 373 * Get string descriptor from device * 374 * * 375 ************************************************************************/ 376static int get_string(struct usb_device *dev, int Id, char *string, int buflen) 377{ 378 struct usb_string_descriptor StringDesc; 379 struct usb_string_descriptor *pStringDesc; 380 381 dbg("%s - USB String ID = %d", __func__, Id); 382 383 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, 384 &StringDesc, sizeof(StringDesc))) 385 return 0; 386 387 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 388 if (!pStringDesc) 389 return 0; 390 391 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, 392 pStringDesc, StringDesc.bLength)) { 393 kfree(pStringDesc); 394 return 0; 395 } 396 397 unicode_to_ascii(string, buflen, 398 pStringDesc->wData, pStringDesc->bLength/2); 399 400 kfree(pStringDesc); 401 dbg("%s - USB String %s", __func__, string); 402 return strlen(string); 403} 404 405 406#if 0 407/************************************************************************ 408 * 409 * Get string descriptor from device 410 * 411 ************************************************************************/ 412static int get_string_desc(struct usb_device *dev, int Id, 413 struct usb_string_descriptor **pRetDesc) 414{ 415 struct usb_string_descriptor StringDesc; 416 struct usb_string_descriptor *pStringDesc; 417 418 dbg("%s - USB String ID = %d", __func__, Id); 419 420 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 421 sizeof(StringDesc))) 422 return 0; 423 424 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 425 if (!pStringDesc) 426 return -1; 427 428 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 429 StringDesc.bLength)) { 430 kfree(pStringDesc); 431 return -1; 432 } 433 434 *pRetDesc = pStringDesc; 435 return 0; 436} 437#endif 438 439static void dump_product_info(struct edgeport_product_info *product_info) 440{ 441 /* Dump Product Info structure */ 442 dbg("**Product Information:"); 443 dbg(" ProductId %x", product_info->ProductId); 444 dbg(" NumPorts %d", product_info->NumPorts); 445 dbg(" ProdInfoVer %d", product_info->ProdInfoVer); 446 dbg(" IsServer %d", product_info->IsServer); 447 dbg(" IsRS232 %d", product_info->IsRS232); 448 dbg(" IsRS422 %d", product_info->IsRS422); 449 dbg(" IsRS485 %d", product_info->IsRS485); 450 dbg(" RomSize %d", product_info->RomSize); 451 dbg(" RamSize %d", product_info->RamSize); 452 dbg(" CpuRev %x", product_info->CpuRev); 453 dbg(" BoardRev %x", product_info->BoardRev); 454 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 455 product_info->BootMinorVersion, 456 le16_to_cpu(product_info->BootBuildNumber)); 457 dbg(" FirmwareMajorVersion %d.%d.%d", 458 product_info->FirmwareMajorVersion, 459 product_info->FirmwareMinorVersion, 460 le16_to_cpu(product_info->FirmwareBuildNumber)); 461 dbg(" ManufactureDescDate %d/%d/%d", 462 product_info->ManufactureDescDate[0], 463 product_info->ManufactureDescDate[1], 464 product_info->ManufactureDescDate[2]+1900); 465 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 466 dbg(" EpicVer %d", product_info->EpicVer); 467} 468 469static void get_product_info(struct edgeport_serial *edge_serial) 470{ 471 struct edgeport_product_info *product_info = &edge_serial->product_info; 472 473 memset(product_info, 0, sizeof(struct edgeport_product_info)); 474 475 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 476 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 477 product_info->ProdInfoVer = 0; 478 479 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 480 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 481 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 482 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 483 484 product_info->BootMajorVersion = 485 edge_serial->boot_descriptor.MajorVersion; 486 product_info->BootMinorVersion = 487 edge_serial->boot_descriptor.MinorVersion; 488 product_info->BootBuildNumber = 489 edge_serial->boot_descriptor.BuildNumber; 490 491 memcpy(product_info->ManufactureDescDate, 492 edge_serial->manuf_descriptor.DescDate, 493 sizeof(edge_serial->manuf_descriptor.DescDate)); 494 495 /* check if this is 2nd generation hardware */ 496 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 497 & ION_DEVICE_ID_80251_NETCHIP) 498 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 499 else 500 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 501 502 /* Determine Product type and set appropriate flags */ 503 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 504 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 505 case ION_DEVICE_ID_EDGEPORT_4T: 506 case ION_DEVICE_ID_EDGEPORT_4: 507 case ION_DEVICE_ID_EDGEPORT_2: 508 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 509 case ION_DEVICE_ID_EDGEPORT_8: 510 case ION_DEVICE_ID_EDGEPORT_421: 511 case ION_DEVICE_ID_EDGEPORT_21: 512 case ION_DEVICE_ID_EDGEPORT_2_DIN: 513 case ION_DEVICE_ID_EDGEPORT_4_DIN: 514 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 515 product_info->IsRS232 = 1; 516 break; 517 518 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 519 product_info->IsRS422 = 1; 520 product_info->IsRS485 = 1; 521 break; 522 523 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 524 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 525 product_info->IsRS422 = 1; 526 break; 527 } 528 529 dump_product_info(product_info); 530} 531 532static int get_epic_descriptor(struct edgeport_serial *ep) 533{ 534 int result; 535 struct usb_serial *serial = ep->serial; 536 struct edgeport_product_info *product_info = &ep->product_info; 537 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 538 struct edge_compatibility_bits *bits; 539 540 ep->is_epic = 0; 541 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 542 USB_REQUEST_ION_GET_EPIC_DESC, 543 0xC0, 0x00, 0x00, 544 &ep->epic_descriptor, 545 sizeof(struct edge_compatibility_descriptor), 546 300); 547 548 dbg("%s result = %d", __func__, result); 549 550 if (result > 0) { 551 ep->is_epic = 1; 552 memset(product_info, 0, sizeof(struct edgeport_product_info)); 553 554 product_info->NumPorts = epic->NumPorts; 555 product_info->ProdInfoVer = 0; 556 product_info->FirmwareMajorVersion = epic->MajorVersion; 557 product_info->FirmwareMinorVersion = epic->MinorVersion; 558 product_info->FirmwareBuildNumber = epic->BuildNumber; 559 product_info->iDownloadFile = epic->iDownloadFile; 560 product_info->EpicVer = epic->EpicVer; 561 product_info->Epic = epic->Supports; 562 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 563 dump_product_info(product_info); 564 565 bits = &ep->epic_descriptor.Supports; 566 dbg("**EPIC descriptor:"); 567 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE"); 568 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE"); 569 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE"); 570 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE"); 571 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 572 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 573 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE"); 574 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE"); 575 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 576 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 577 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 578 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 579 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE"); 580 } 581 582 return result; 583} 584 585 586/************************************************************************/ 587/************************************************************************/ 588/* U S B C A L L B A C K F U N C T I O N S */ 589/* U S B C A L L B A C K F U N C T I O N S */ 590/************************************************************************/ 591/************************************************************************/ 592 593/***************************************************************************** 594 * edge_interrupt_callback 595 * this is the callback function for when we have received data on the 596 * interrupt endpoint. 597 *****************************************************************************/ 598static void edge_interrupt_callback(struct urb *urb) 599{ 600 struct edgeport_serial *edge_serial = urb->context; 601 struct edgeport_port *edge_port; 602 struct usb_serial_port *port; 603 struct tty_struct *tty; 604 unsigned char *data = urb->transfer_buffer; 605 int length = urb->actual_length; 606 int bytes_avail; 607 int position; 608 int txCredits; 609 int portNumber; 610 int result; 611 int status = urb->status; 612 613 dbg("%s", __func__); 614 615 switch (status) { 616 case 0: 617 /* success */ 618 break; 619 case -ECONNRESET: 620 case -ENOENT: 621 case -ESHUTDOWN: 622 /* this urb is terminated, clean up */ 623 dbg("%s - urb shutting down with status: %d", 624 __func__, status); 625 return; 626 default: 627 dbg("%s - nonzero urb status received: %d", __func__, status); 628 goto exit; 629 } 630 631 /* process this interrupt-read even if there are no ports open */ 632 if (length) { 633 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 634 __func__, length, data); 635 636 if (length > 1) { 637 bytes_avail = data[0] | (data[1] << 8); 638 if (bytes_avail) { 639 spin_lock(&edge_serial->es_lock); 640 edge_serial->rxBytesAvail += bytes_avail; 641 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 642 643 if (edge_serial->rxBytesAvail > 0 && 644 !edge_serial->read_in_progress) { 645 dbg("%s - posting a read", __func__); 646 edge_serial->read_in_progress = true; 647 648 /* we have pending bytes on the 649 bulk in pipe, send a request */ 650 edge_serial->read_urb->dev = edge_serial->serial->dev; 651 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 652 if (result) { 653 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result); 654 edge_serial->read_in_progress = false; 655 } 656 } 657 spin_unlock(&edge_serial->es_lock); 658 } 659 } 660 /* grab the txcredits for the ports if available */ 661 position = 2; 662 portNumber = 0; 663 while ((position < length) && 664 (portNumber < edge_serial->serial->num_ports)) { 665 txCredits = data[position] | (data[position+1] << 8); 666 if (txCredits) { 667 port = edge_serial->serial->port[portNumber]; 668 edge_port = usb_get_serial_port_data(port); 669 if (edge_port->open) { 670 spin_lock(&edge_port->ep_lock); 671 edge_port->txCredits += txCredits; 672 spin_unlock(&edge_port->ep_lock); 673 dbg("%s - txcredits for port%d = %d", 674 __func__, portNumber, 675 edge_port->txCredits); 676 677 /* tell the tty driver that something 678 has changed */ 679 tty = tty_port_tty_get( 680 &edge_port->port->port); 681 if (tty) { 682 tty_wakeup(tty); 683 tty_kref_put(tty); 684 } 685 /* Since we have more credit, check 686 if more data can be sent */ 687 send_more_port_data(edge_serial, 688 edge_port); 689 } 690 } 691 position += 2; 692 ++portNumber; 693 } 694 } 695 696exit: 697 result = usb_submit_urb(urb, GFP_ATOMIC); 698 if (result) 699 dev_err(&urb->dev->dev, 700 "%s - Error %d submitting control urb\n", 701 __func__, result); 702} 703 704 705/***************************************************************************** 706 * edge_bulk_in_callback 707 * this is the callback function for when we have received data on the 708 * bulk in endpoint. 709 *****************************************************************************/ 710static void edge_bulk_in_callback(struct urb *urb) 711{ 712 struct edgeport_serial *edge_serial = urb->context; 713 unsigned char *data = urb->transfer_buffer; 714 int retval; 715 __u16 raw_data_length; 716 int status = urb->status; 717 718 dbg("%s", __func__); 719 720 if (status) { 721 dbg("%s - nonzero read bulk status received: %d", 722 __func__, status); 723 edge_serial->read_in_progress = false; 724 return; 725 } 726 727 if (urb->actual_length == 0) { 728 dbg("%s - read bulk callback with no data", __func__); 729 edge_serial->read_in_progress = false; 730 return; 731 } 732 733 raw_data_length = urb->actual_length; 734 735 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 736 __func__, raw_data_length, data); 737 738 spin_lock(&edge_serial->es_lock); 739 740 /* decrement our rxBytes available by the number that we just got */ 741 edge_serial->rxBytesAvail -= raw_data_length; 742 743 dbg("%s - Received = %d, rxBytesAvail %d", __func__, 744 raw_data_length, edge_serial->rxBytesAvail); 745 746 process_rcvd_data(edge_serial, data, urb->actual_length); 747 748 /* check to see if there's any more data for us to read */ 749 if (edge_serial->rxBytesAvail > 0) { 750 dbg("%s - posting a read", __func__); 751 edge_serial->read_urb->dev = edge_serial->serial->dev; 752 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 753 if (retval) { 754 dev_err(&urb->dev->dev, 755 "%s - usb_submit_urb(read bulk) failed, " 756 "retval = %d\n", __func__, retval); 757 edge_serial->read_in_progress = false; 758 } 759 } else { 760 edge_serial->read_in_progress = false; 761 } 762 763 spin_unlock(&edge_serial->es_lock); 764} 765 766 767/***************************************************************************** 768 * edge_bulk_out_data_callback 769 * this is the callback function for when we have finished sending 770 * serial data on the bulk out endpoint. 771 *****************************************************************************/ 772static void edge_bulk_out_data_callback(struct urb *urb) 773{ 774 struct edgeport_port *edge_port = urb->context; 775 struct tty_struct *tty; 776 int status = urb->status; 777 778 dbg("%s", __func__); 779 780 if (status) { 781 dbg("%s - nonzero write bulk status received: %d", 782 __func__, status); 783 } 784 785 tty = tty_port_tty_get(&edge_port->port->port); 786 787 if (tty && edge_port->open) { 788 /* let the tty driver wakeup if it has a special 789 write_wakeup function */ 790 tty_wakeup(tty); 791 } 792 tty_kref_put(tty); 793 794 /* Release the Write URB */ 795 edge_port->write_in_progress = false; 796 797 /* Check if more data needs to be sent */ 798 send_more_port_data((struct edgeport_serial *) 799 (usb_get_serial_data(edge_port->port->serial)), edge_port); 800} 801 802 803/***************************************************************************** 804 * BulkOutCmdCallback 805 * this is the callback function for when we have finished sending a 806 * command on the bulk out endpoint. 807 *****************************************************************************/ 808static void edge_bulk_out_cmd_callback(struct urb *urb) 809{ 810 struct edgeport_port *edge_port = urb->context; 811 struct tty_struct *tty; 812 int status = urb->status; 813 814 dbg("%s", __func__); 815 816 atomic_dec(&CmdUrbs); 817 dbg("%s - FREE URB %p (outstanding %d)", __func__, 818 urb, atomic_read(&CmdUrbs)); 819 820 821 /* clean up the transfer buffer */ 822 kfree(urb->transfer_buffer); 823 824 /* Free the command urb */ 825 usb_free_urb(urb); 826 827 if (status) { 828 dbg("%s - nonzero write bulk status received: %d", 829 __func__, status); 830 return; 831 } 832 833 /* Get pointer to tty */ 834 tty = tty_port_tty_get(&edge_port->port->port); 835 836 /* tell the tty driver that something has changed */ 837 if (tty && edge_port->open) 838 tty_wakeup(tty); 839 tty_kref_put(tty); 840 841 /* we have completed the command */ 842 edge_port->commandPending = false; 843 wake_up(&edge_port->wait_command); 844} 845 846 847/***************************************************************************** 848 * Driver tty interface functions 849 *****************************************************************************/ 850 851/***************************************************************************** 852 * SerialOpen 853 * this function is called by the tty driver when a port is opened 854 * If successful, we return 0 855 * Otherwise we return a negative error number. 856 *****************************************************************************/ 857static int edge_open(struct tty_struct *tty, 858 struct usb_serial_port *port, struct file *filp) 859{ 860 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 861 struct usb_serial *serial; 862 struct edgeport_serial *edge_serial; 863 int response; 864 865 dbg("%s - port %d", __func__, port->number); 866 867 if (edge_port == NULL) 868 return -ENODEV; 869 870 if (tty) 871 tty->low_latency = low_latency; 872 873 /* see if we've set up our endpoint info yet (can't set it up 874 in edge_startup as the structures were not set up at that time.) */ 875 serial = port->serial; 876 edge_serial = usb_get_serial_data(serial); 877 if (edge_serial == NULL) 878 return -ENODEV; 879 if (edge_serial->interrupt_in_buffer == NULL) { 880 struct usb_serial_port *port0 = serial->port[0]; 881 882 /* not set up yet, so do it now */ 883 edge_serial->interrupt_in_buffer = 884 port0->interrupt_in_buffer; 885 edge_serial->interrupt_in_endpoint = 886 port0->interrupt_in_endpointAddress; 887 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 888 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 889 edge_serial->bulk_in_endpoint = 890 port0->bulk_in_endpointAddress; 891 edge_serial->read_urb = port0->read_urb; 892 edge_serial->bulk_out_endpoint = 893 port0->bulk_out_endpointAddress; 894 895 /* set up our interrupt urb */ 896 usb_fill_int_urb(edge_serial->interrupt_read_urb, 897 serial->dev, 898 usb_rcvintpipe(serial->dev, 899 port0->interrupt_in_endpointAddress), 900 port0->interrupt_in_buffer, 901 edge_serial->interrupt_read_urb->transfer_buffer_length, 902 edge_interrupt_callback, edge_serial, 903 edge_serial->interrupt_read_urb->interval); 904 905 /* set up our bulk in urb */ 906 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 907 usb_rcvbulkpipe(serial->dev, 908 port0->bulk_in_endpointAddress), 909 port0->bulk_in_buffer, 910 edge_serial->read_urb->transfer_buffer_length, 911 edge_bulk_in_callback, edge_serial); 912 edge_serial->read_in_progress = false; 913 914 /* start interrupt read for this edgeport 915 * this interrupt will continue as long 916 * as the edgeport is connected */ 917 response = usb_submit_urb(edge_serial->interrupt_read_urb, 918 GFP_KERNEL); 919 if (response) { 920 dev_err(&port->dev, 921 "%s - Error %d submitting control urb\n", 922 __func__, response); 923 } 924 } 925 926 /* initialize our wait queues */ 927 init_waitqueue_head(&edge_port->wait_open); 928 init_waitqueue_head(&edge_port->wait_chase); 929 init_waitqueue_head(&edge_port->delta_msr_wait); 930 init_waitqueue_head(&edge_port->wait_command); 931 932 /* initialize our icount structure */ 933 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 934 935 /* initialize our port settings */ 936 edge_port->txCredits = 0; /* Can't send any data yet */ 937 /* Must always set this bit to enable ints! */ 938 edge_port->shadowMCR = MCR_MASTER_IE; 939 edge_port->chaseResponsePending = false; 940 941 /* send a open port command */ 942 edge_port->openPending = true; 943 edge_port->open = false; 944 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); 945 946 if (response < 0) { 947 dev_err(&port->dev, "%s - error sending open port command\n", 948 __func__); 949 edge_port->openPending = false; 950 return -ENODEV; 951 } 952 953 /* now wait for the port to be completely opened */ 954 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 955 OPEN_TIMEOUT); 956 957 if (!edge_port->open) { 958 /* open timed out */ 959 dbg("%s - open timedout", __func__); 960 edge_port->openPending = false; 961 return -ENODEV; 962 } 963 964 /* create the txfifo */ 965 edge_port->txfifo.head = 0; 966 edge_port->txfifo.tail = 0; 967 edge_port->txfifo.count = 0; 968 edge_port->txfifo.size = edge_port->maxTxCredits; 969 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 970 971 if (!edge_port->txfifo.fifo) { 972 dbg("%s - no memory", __func__); 973 edge_close(tty, port, filp); 974 return -ENOMEM; 975 } 976 977 /* Allocate a URB for the write */ 978 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 979 edge_port->write_in_progress = false; 980 981 if (!edge_port->write_urb) { 982 dbg("%s - no memory", __func__); 983 edge_close(tty, port, filp); 984 return -ENOMEM; 985 } 986 987 dbg("%s(%d) - Initialize TX fifo to %d bytes", 988 __func__, port->number, edge_port->maxTxCredits); 989 990 dbg("%s exited", __func__); 991 992 return 0; 993} 994 995 996/************************************************************************ 997 * 998 * block_until_chase_response 999 * 1000 * This function will block the close until one of the following: 1001 * 1. Response to our Chase comes from Edgeport 1002 * 2. A timeout of 10 seconds without activity has expired 1003 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 1004 * 1005 ************************************************************************/ 1006static void block_until_chase_response(struct edgeport_port *edge_port) 1007{ 1008 DEFINE_WAIT(wait); 1009 __u16 lastCredits; 1010 int timeout = 1*HZ; 1011 int loop = 10; 1012 1013 while (1) { 1014 /* Save Last credits */ 1015 lastCredits = edge_port->txCredits; 1016 1017 /* Did we get our Chase response */ 1018 if (!edge_port->chaseResponsePending) { 1019 dbg("%s - Got Chase Response", __func__); 1020 1021 /* did we get all of our credit back? */ 1022 if (edge_port->txCredits == edge_port->maxTxCredits) { 1023 dbg("%s - Got all credits", __func__); 1024 return; 1025 } 1026 } 1027 1028 /* Block the thread for a while */ 1029 prepare_to_wait(&edge_port->wait_chase, &wait, 1030 TASK_UNINTERRUPTIBLE); 1031 schedule_timeout(timeout); 1032 finish_wait(&edge_port->wait_chase, &wait); 1033 1034 if (lastCredits == edge_port->txCredits) { 1035 /* No activity.. count down. */ 1036 loop--; 1037 if (loop == 0) { 1038 edge_port->chaseResponsePending = false; 1039 dbg("%s - Chase TIMEOUT", __func__); 1040 return; 1041 } 1042 } else { 1043 /* Reset timeout value back to 10 seconds */ 1044 dbg("%s - Last %d, Current %d", __func__, 1045 lastCredits, edge_port->txCredits); 1046 loop = 10; 1047 } 1048 } 1049} 1050 1051 1052/************************************************************************ 1053 * 1054 * block_until_tx_empty 1055 * 1056 * This function will block the close until one of the following: 1057 * 1. TX count are 0 1058 * 2. The edgeport has stopped 1059 * 3. A timeout of 3 seconds without activity has expired 1060 * 1061 ************************************************************************/ 1062static void block_until_tx_empty(struct edgeport_port *edge_port) 1063{ 1064 DEFINE_WAIT(wait); 1065 struct TxFifo *fifo = &edge_port->txfifo; 1066 __u32 lastCount; 1067 int timeout = HZ/10; 1068 int loop = 30; 1069 1070 while (1) { 1071 /* Save Last count */ 1072 lastCount = fifo->count; 1073 1074 /* Is the Edgeport Buffer empty? */ 1075 if (lastCount == 0) { 1076 dbg("%s - TX Buffer Empty", __func__); 1077 return; 1078 } 1079 1080 /* Block the thread for a while */ 1081 prepare_to_wait(&edge_port->wait_chase, &wait, 1082 TASK_UNINTERRUPTIBLE); 1083 schedule_timeout(timeout); 1084 finish_wait(&edge_port->wait_chase, &wait); 1085 1086 dbg("%s wait", __func__); 1087 1088 if (lastCount == fifo->count) { 1089 /* No activity.. count down. */ 1090 loop--; 1091 if (loop == 0) { 1092 dbg("%s - TIMEOUT", __func__); 1093 return; 1094 } 1095 } else { 1096 /* Reset timeout value back to seconds */ 1097 loop = 30; 1098 } 1099 } 1100} 1101 1102 1103/***************************************************************************** 1104 * edge_close 1105 * this function is called by the tty driver when a port is closed 1106 *****************************************************************************/ 1107static void edge_close(struct tty_struct *tty, 1108 struct usb_serial_port *port, struct file *filp) 1109{ 1110 struct edgeport_serial *edge_serial; 1111 struct edgeport_port *edge_port; 1112 int status; 1113 1114 dbg("%s - port %d", __func__, port->number); 1115 1116 edge_serial = usb_get_serial_data(port->serial); 1117 edge_port = usb_get_serial_port_data(port); 1118 if (edge_serial == NULL || edge_port == NULL) 1119 return; 1120 1121 /* block until tx is empty */ 1122 block_until_tx_empty(edge_port); 1123 1124 edge_port->closePending = true; 1125 1126 if ((!edge_serial->is_epic) || 1127 ((edge_serial->is_epic) && 1128 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1129 /* flush and chase */ 1130 edge_port->chaseResponsePending = true; 1131 1132 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1133 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1134 if (status == 0) 1135 /* block until chase finished */ 1136 block_until_chase_response(edge_port); 1137 else 1138 edge_port->chaseResponsePending = false; 1139 } 1140 1141 if ((!edge_serial->is_epic) || 1142 ((edge_serial->is_epic) && 1143 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1144 /* close the port */ 1145 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__); 1146 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1147 } 1148 1149 /* port->close = true; */ 1150 edge_port->closePending = false; 1151 edge_port->open = false; 1152 edge_port->openPending = false; 1153 1154 usb_kill_urb(edge_port->write_urb); 1155 1156 if (edge_port->write_urb) { 1157 /* if this urb had a transfer buffer already 1158 (old transfer) free it */ 1159 kfree(edge_port->write_urb->transfer_buffer); 1160 usb_free_urb(edge_port->write_urb); 1161 edge_port->write_urb = NULL; 1162 } 1163 kfree(edge_port->txfifo.fifo); 1164 edge_port->txfifo.fifo = NULL; 1165 1166 dbg("%s exited", __func__); 1167} 1168 1169/***************************************************************************** 1170 * SerialWrite 1171 * this function is called by the tty driver when data should be written 1172 * to the port. 1173 * If successful, we return the number of bytes written, otherwise we 1174 * return a negative error number. 1175 *****************************************************************************/ 1176static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1177 const unsigned char *data, int count) 1178{ 1179 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1180 struct TxFifo *fifo; 1181 int copySize; 1182 int bytesleft; 1183 int firsthalf; 1184 int secondhalf; 1185 unsigned long flags; 1186 1187 dbg("%s - port %d", __func__, port->number); 1188 1189 if (edge_port == NULL) 1190 return -ENODEV; 1191 1192 /* get a pointer to the Tx fifo */ 1193 fifo = &edge_port->txfifo; 1194 1195 spin_lock_irqsave(&edge_port->ep_lock, flags); 1196 1197 /* calculate number of bytes to put in fifo */ 1198 copySize = min((unsigned int)count, 1199 (edge_port->txCredits - fifo->count)); 1200 1201 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", 1202 __func__, port->number, count, 1203 edge_port->txCredits - fifo->count, copySize); 1204 1205 /* catch writes of 0 bytes which the tty driver likes to give us, 1206 and when txCredits is empty */ 1207 if (copySize == 0) { 1208 dbg("%s - copySize = Zero", __func__); 1209 goto finish_write; 1210 } 1211 1212 /* queue the data 1213 * since we can never overflow the buffer we do not have to check for a 1214 * full condition 1215 * 1216 * the copy is done is two parts -- first fill to the end of the buffer 1217 * then copy the reset from the start of the buffer 1218 */ 1219 bytesleft = fifo->size - fifo->head; 1220 firsthalf = min(bytesleft, copySize); 1221 dbg("%s - copy %d bytes of %d into fifo ", __func__, 1222 firsthalf, bytesleft); 1223 1224 /* now copy our data */ 1225 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1226 usb_serial_debug_data(debug, &port->dev, __func__, 1227 firsthalf, &fifo->fifo[fifo->head]); 1228 1229 /* update the index and size */ 1230 fifo->head += firsthalf; 1231 fifo->count += firsthalf; 1232 1233 /* wrap the index */ 1234 if (fifo->head == fifo->size) 1235 fifo->head = 0; 1236 1237 secondhalf = copySize-firsthalf; 1238 1239 if (secondhalf) { 1240 dbg("%s - copy rest of data %d", __func__, secondhalf); 1241 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1242 usb_serial_debug_data(debug, &port->dev, __func__, 1243 secondhalf, &fifo->fifo[fifo->head]); 1244 /* update the index and size */ 1245 fifo->count += secondhalf; 1246 fifo->head += secondhalf; 1247 /* No need to check for wrap since we can not get to end of 1248 * the fifo in this part 1249 */ 1250 } 1251 1252finish_write: 1253 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1254 1255 send_more_port_data((struct edgeport_serial *) 1256 usb_get_serial_data(port->serial), edge_port); 1257 1258 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__, 1259 copySize, edge_port->txCredits, fifo->count); 1260 1261 return copySize; 1262} 1263 1264 1265/************************************************************************ 1266 * 1267 * send_more_port_data() 1268 * 1269 * This routine attempts to write additional UART transmit data 1270 * to a port over the USB bulk pipe. It is called (1) when new 1271 * data has been written to a port's TxBuffer from higher layers 1272 * (2) when the peripheral sends us additional TxCredits indicating 1273 * that it can accept more Tx data for a given port; and (3) when 1274 * a bulk write completes successfully and we want to see if we 1275 * can transmit more. 1276 * 1277 ************************************************************************/ 1278static void send_more_port_data(struct edgeport_serial *edge_serial, 1279 struct edgeport_port *edge_port) 1280{ 1281 struct TxFifo *fifo = &edge_port->txfifo; 1282 struct urb *urb; 1283 unsigned char *buffer; 1284 int status; 1285 int count; 1286 int bytesleft; 1287 int firsthalf; 1288 int secondhalf; 1289 unsigned long flags; 1290 1291 dbg("%s(%d)", __func__, edge_port->port->number); 1292 1293 spin_lock_irqsave(&edge_port->ep_lock, flags); 1294 1295 if (edge_port->write_in_progress || 1296 !edge_port->open || 1297 (fifo->count == 0)) { 1298 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", 1299 __func__, edge_port->port->number, 1300 fifo->count, edge_port->write_in_progress); 1301 goto exit_send; 1302 } 1303 1304 /* since the amount of data in the fifo will always fit into the 1305 * edgeport buffer we do not need to check the write length 1306 * 1307 * Do we have enough credits for this port to make it worthwhile 1308 * to bother queueing a write. If it's too small, say a few bytes, 1309 * it's better to wait for more credits so we can do a larger write. 1310 */ 1311 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1312 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", 1313 __func__, edge_port->port->number, fifo->count, 1314 edge_port->txCredits); 1315 goto exit_send; 1316 } 1317 1318 /* lock this write */ 1319 edge_port->write_in_progress = true; 1320 1321 /* get a pointer to the write_urb */ 1322 urb = edge_port->write_urb; 1323 1324 /* make sure transfer buffer is freed */ 1325 kfree(urb->transfer_buffer); 1326 urb->transfer_buffer = NULL; 1327 1328 /* build the data header for the buffer and port that we are about 1329 to send out */ 1330 count = fifo->count; 1331 buffer = kmalloc(count+2, GFP_ATOMIC); 1332 if (buffer == NULL) { 1333 dev_err(&edge_port->port->dev, 1334 "%s - no more kernel memory...\n", __func__); 1335 edge_port->write_in_progress = false; 1336 goto exit_send; 1337 } 1338 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number 1339 - edge_port->port->serial->minor, count); 1340 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number 1341 - edge_port->port->serial->minor, count); 1342 1343 /* now copy our data */ 1344 bytesleft = fifo->size - fifo->tail; 1345 firsthalf = min(bytesleft, count); 1346 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1347 fifo->tail += firsthalf; 1348 fifo->count -= firsthalf; 1349 if (fifo->tail == fifo->size) 1350 fifo->tail = 0; 1351 1352 secondhalf = count-firsthalf; 1353 if (secondhalf) { 1354 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1355 secondhalf); 1356 fifo->tail += secondhalf; 1357 fifo->count -= secondhalf; 1358 } 1359 1360 if (count) 1361 usb_serial_debug_data(debug, &edge_port->port->dev, 1362 __func__, count, &buffer[2]); 1363 1364 /* fill up the urb with all of our data and submit it */ 1365 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1366 usb_sndbulkpipe(edge_serial->serial->dev, 1367 edge_serial->bulk_out_endpoint), 1368 buffer, count+2, 1369 edge_bulk_out_data_callback, edge_port); 1370 1371 /* decrement the number of credits we have by the number we just sent */ 1372 edge_port->txCredits -= count; 1373 edge_port->icount.tx += count; 1374 1375 urb->dev = edge_serial->serial->dev; 1376 status = usb_submit_urb(urb, GFP_ATOMIC); 1377 if (status) { 1378 /* something went wrong */ 1379 dev_err(&edge_port->port->dev, 1380 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1381 __func__, status); 1382 edge_port->write_in_progress = false; 1383 1384 /* revert the credits as something bad happened. */ 1385 edge_port->txCredits += count; 1386 edge_port->icount.tx -= count; 1387 } 1388 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", 1389 __func__, count, edge_port->txCredits, fifo->count); 1390 1391exit_send: 1392 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1393} 1394 1395 1396/***************************************************************************** 1397 * edge_write_room 1398 * this function is called by the tty driver when it wants to know how 1399 * many bytes of data we can accept for a specific port. If successful, 1400 * we return the amount of room that we have for this port (the txCredits) 1401 * otherwise we return a negative error number. 1402 *****************************************************************************/ 1403static int edge_write_room(struct tty_struct *tty) 1404{ 1405 struct usb_serial_port *port = tty->driver_data; 1406 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1407 int room; 1408 unsigned long flags; 1409 1410 dbg("%s", __func__); 1411 1412 if (edge_port == NULL) 1413 return 0; 1414 if (edge_port->closePending) 1415 return 0; 1416 1417 dbg("%s - port %d", __func__, port->number); 1418 1419 if (!edge_port->open) { 1420 dbg("%s - port not opened", __func__); 1421 return 0; 1422 } 1423 1424 /* total of both buffers is still txCredit */ 1425 spin_lock_irqsave(&edge_port->ep_lock, flags); 1426 room = edge_port->txCredits - edge_port->txfifo.count; 1427 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1428 1429 dbg("%s - returns %d", __func__, room); 1430 return room; 1431} 1432 1433 1434/***************************************************************************** 1435 * edge_chars_in_buffer 1436 * this function is called by the tty driver when it wants to know how 1437 * many bytes of data we currently have outstanding in the port (data that 1438 * has been written, but hasn't made it out the port yet) 1439 * If successful, we return the number of bytes left to be written in the 1440 * system, 1441 * Otherwise we return a negative error number. 1442 *****************************************************************************/ 1443static int edge_chars_in_buffer(struct tty_struct *tty) 1444{ 1445 struct usb_serial_port *port = tty->driver_data; 1446 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1447 int num_chars; 1448 unsigned long flags; 1449 1450 dbg("%s", __func__); 1451 1452 if (edge_port == NULL) 1453 return 0; 1454 if (edge_port->closePending) 1455 return 0; 1456 1457 if (!edge_port->open) { 1458 dbg("%s - port not opened", __func__); 1459 return 0; 1460 } 1461 1462 spin_lock_irqsave(&edge_port->ep_lock, flags); 1463 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1464 edge_port->txfifo.count; 1465 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1466 if (num_chars) { 1467 dbg("%s(port %d) - returns %d", __func__, 1468 port->number, num_chars); 1469 } 1470 1471 return num_chars; 1472} 1473 1474 1475/***************************************************************************** 1476 * SerialThrottle 1477 * this function is called by the tty driver when it wants to stop the data 1478 * being read from the port. 1479 *****************************************************************************/ 1480static void edge_throttle(struct tty_struct *tty) 1481{ 1482 struct usb_serial_port *port = tty->driver_data; 1483 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1484 int status; 1485 1486 dbg("%s - port %d", __func__, port->number); 1487 1488 if (edge_port == NULL) 1489 return; 1490 1491 if (!edge_port->open) { 1492 dbg("%s - port not opened", __func__); 1493 return; 1494 } 1495 1496 /* if we are implementing XON/XOFF, send the stop character */ 1497 if (I_IXOFF(tty)) { 1498 unsigned char stop_char = STOP_CHAR(tty); 1499 status = edge_write(tty, port, &stop_char, 1); 1500 if (status <= 0) 1501 return; 1502 } 1503 1504 /* if we are implementing RTS/CTS, toggle that line */ 1505 if (tty->termios->c_cflag & CRTSCTS) { 1506 edge_port->shadowMCR &= ~MCR_RTS; 1507 status = send_cmd_write_uart_register(edge_port, MCR, 1508 edge_port->shadowMCR); 1509 if (status != 0) 1510 return; 1511 } 1512 1513 return; 1514} 1515 1516 1517/***************************************************************************** 1518 * edge_unthrottle 1519 * this function is called by the tty driver when it wants to resume the 1520 * data being read from the port (called after SerialThrottle is called) 1521 *****************************************************************************/ 1522static void edge_unthrottle(struct tty_struct *tty) 1523{ 1524 struct usb_serial_port *port = tty->driver_data; 1525 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1526 int status; 1527 1528 dbg("%s - port %d", __func__, port->number); 1529 1530 if (edge_port == NULL) 1531 return; 1532 1533 if (!edge_port->open) { 1534 dbg("%s - port not opened", __func__); 1535 return; 1536 } 1537 1538 /* if we are implementing XON/XOFF, send the start character */ 1539 if (I_IXOFF(tty)) { 1540 unsigned char start_char = START_CHAR(tty); 1541 status = edge_write(tty, port, &start_char, 1); 1542 if (status <= 0) 1543 return; 1544 } 1545 /* if we are implementing RTS/CTS, toggle that line */ 1546 if (tty->termios->c_cflag & CRTSCTS) { 1547 edge_port->shadowMCR |= MCR_RTS; 1548 send_cmd_write_uart_register(edge_port, MCR, 1549 edge_port->shadowMCR); 1550 } 1551} 1552 1553 1554/***************************************************************************** 1555 * SerialSetTermios 1556 * this function is called by the tty driver when it wants to change 1557 * the termios structure 1558 *****************************************************************************/ 1559static void edge_set_termios(struct tty_struct *tty, 1560 struct usb_serial_port *port, struct ktermios *old_termios) 1561{ 1562 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1563 unsigned int cflag; 1564 1565 cflag = tty->termios->c_cflag; 1566 dbg("%s - clfag %08x iflag %08x", __func__, 1567 tty->termios->c_cflag, tty->termios->c_iflag); 1568 dbg("%s - old clfag %08x old iflag %08x", __func__, 1569 old_termios->c_cflag, old_termios->c_iflag); 1570 1571 dbg("%s - port %d", __func__, port->number); 1572 1573 if (edge_port == NULL) 1574 return; 1575 1576 if (!edge_port->open) { 1577 dbg("%s - port not opened", __func__); 1578 return; 1579 } 1580 1581 /* change the port settings to the new ones specified */ 1582 change_port_settings(tty, edge_port, old_termios); 1583} 1584 1585 1586/***************************************************************************** 1587 * get_lsr_info - get line status register info 1588 * 1589 * Purpose: Let user call ioctl() to get info when the UART physically 1590 * is emptied. On bus types like RS485, the transmitter must 1591 * release the bus after transmitting. This must be done when 1592 * the transmit shift register is empty, not be done when the 1593 * transmit holding register is empty. This functionality 1594 * allows an RS485 driver to be written in user space. 1595 *****************************************************************************/ 1596static int get_lsr_info(struct edgeport_port *edge_port, 1597 unsigned int __user *value) 1598{ 1599 unsigned int result = 0; 1600 unsigned long flags; 1601 1602 spin_lock_irqsave(&edge_port->ep_lock, flags); 1603 if (edge_port->maxTxCredits == edge_port->txCredits && 1604 edge_port->txfifo.count == 0) { 1605 dbg("%s -- Empty", __func__); 1606 result = TIOCSER_TEMT; 1607 } 1608 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1609 1610 if (copy_to_user(value, &result, sizeof(int))) 1611 return -EFAULT; 1612 return 0; 1613} 1614 1615static int edge_tiocmset(struct tty_struct *tty, struct file *file, 1616 unsigned int set, unsigned int clear) 1617{ 1618 struct usb_serial_port *port = tty->driver_data; 1619 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1620 unsigned int mcr; 1621 1622 dbg("%s - port %d", __func__, port->number); 1623 1624 mcr = edge_port->shadowMCR; 1625 if (set & TIOCM_RTS) 1626 mcr |= MCR_RTS; 1627 if (set & TIOCM_DTR) 1628 mcr |= MCR_DTR; 1629 if (set & TIOCM_LOOP) 1630 mcr |= MCR_LOOPBACK; 1631 1632 if (clear & TIOCM_RTS) 1633 mcr &= ~MCR_RTS; 1634 if (clear & TIOCM_DTR) 1635 mcr &= ~MCR_DTR; 1636 if (clear & TIOCM_LOOP) 1637 mcr &= ~MCR_LOOPBACK; 1638 1639 edge_port->shadowMCR = mcr; 1640 1641 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1642 1643 return 0; 1644} 1645 1646static int edge_tiocmget(struct tty_struct *tty, struct file *file) 1647{ 1648 struct usb_serial_port *port = tty->driver_data; 1649 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1650 unsigned int result = 0; 1651 unsigned int msr; 1652 unsigned int mcr; 1653 1654 dbg("%s - port %d", __func__, port->number); 1655 1656 msr = edge_port->shadowMSR; 1657 mcr = edge_port->shadowMCR; 1658 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1659 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1660 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1661 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1662 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1663 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1664 1665 1666 dbg("%s -- %x", __func__, result); 1667 1668 return result; 1669} 1670 1671static int get_serial_info(struct edgeport_port *edge_port, 1672 struct serial_struct __user *retinfo) 1673{ 1674 struct serial_struct tmp; 1675 1676 if (!retinfo) 1677 return -EFAULT; 1678 1679 memset(&tmp, 0, sizeof(tmp)); 1680 1681 tmp.type = PORT_16550A; 1682 tmp.line = edge_port->port->serial->minor; 1683 tmp.port = edge_port->port->number; 1684 tmp.irq = 0; 1685 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1686 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1687 tmp.baud_base = 9600; 1688 tmp.close_delay = 5*HZ; 1689 tmp.closing_wait = 30*HZ; 1690 1691 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1692 return -EFAULT; 1693 return 0; 1694} 1695 1696 1697 1698/***************************************************************************** 1699 * SerialIoctl 1700 * this function handles any ioctl calls to the driver 1701 *****************************************************************************/ 1702static int edge_ioctl(struct tty_struct *tty, struct file *file, 1703 unsigned int cmd, unsigned long arg) 1704{ 1705 struct usb_serial_port *port = tty->driver_data; 1706 DEFINE_WAIT(wait); 1707 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1708 struct async_icount cnow; 1709 struct async_icount cprev; 1710 struct serial_icounter_struct icount; 1711 1712 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 1713 1714 switch (cmd) { 1715 case TIOCSERGETLSR: 1716 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 1717 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1718 1719 case TIOCGSERIAL: 1720 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 1721 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1722 1723 case TIOCMIWAIT: 1724 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 1725 cprev = edge_port->icount; 1726 while (1) { 1727 prepare_to_wait(&edge_port->delta_msr_wait, 1728 &wait, TASK_INTERRUPTIBLE); 1729 schedule(); 1730 finish_wait(&edge_port->delta_msr_wait, &wait); 1731 /* see if a signal did it */ 1732 if (signal_pending(current)) 1733 return -ERESTARTSYS; 1734 cnow = edge_port->icount; 1735 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1736 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1737 return -EIO; /* no change => error */ 1738 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1739 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1740 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1741 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 1742 return 0; 1743 } 1744 cprev = cnow; 1745 } 1746 /* NOTREACHED */ 1747 break; 1748 1749 case TIOCGICOUNT: 1750 cnow = edge_port->icount; 1751 memset(&icount, 0, sizeof(icount)); 1752 icount.cts = cnow.cts; 1753 icount.dsr = cnow.dsr; 1754 icount.rng = cnow.rng; 1755 icount.dcd = cnow.dcd; 1756 icount.rx = cnow.rx; 1757 icount.tx = cnow.tx; 1758 icount.frame = cnow.frame; 1759 icount.overrun = cnow.overrun; 1760 icount.parity = cnow.parity; 1761 icount.brk = cnow.brk; 1762 icount.buf_overrun = cnow.buf_overrun; 1763 1764 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", 1765 __func__, port->number, icount.rx, icount.tx); 1766 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1767 return -EFAULT; 1768 return 0; 1769 } 1770 return -ENOIOCTLCMD; 1771} 1772 1773 1774/***************************************************************************** 1775 * SerialBreak 1776 * this function sends a break to the port 1777 *****************************************************************************/ 1778static void edge_break(struct tty_struct *tty, int break_state) 1779{ 1780 struct usb_serial_port *port = tty->driver_data; 1781 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1782 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1783 int status; 1784 1785 if ((!edge_serial->is_epic) || 1786 ((edge_serial->is_epic) && 1787 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1788 /* flush and chase */ 1789 edge_port->chaseResponsePending = true; 1790 1791 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1792 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1793 if (status == 0) { 1794 /* block until chase finished */ 1795 block_until_chase_response(edge_port); 1796 } else { 1797 edge_port->chaseResponsePending = false; 1798 } 1799 } 1800 1801 if ((!edge_serial->is_epic) || 1802 ((edge_serial->is_epic) && 1803 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1804 if (break_state == -1) { 1805 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__); 1806 status = send_iosp_ext_cmd(edge_port, 1807 IOSP_CMD_SET_BREAK, 0); 1808 } else { 1809 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__); 1810 status = send_iosp_ext_cmd(edge_port, 1811 IOSP_CMD_CLEAR_BREAK, 0); 1812 } 1813 if (status) 1814 dbg("%s - error sending break set/clear command.", 1815 __func__); 1816 } 1817 1818 return; 1819} 1820 1821 1822/***************************************************************************** 1823 * process_rcvd_data 1824 * this function handles the data received on the bulk in pipe. 1825 *****************************************************************************/ 1826static void process_rcvd_data(struct edgeport_serial *edge_serial, 1827 unsigned char *buffer, __u16 bufferLength) 1828{ 1829 struct usb_serial_port *port; 1830 struct edgeport_port *edge_port; 1831 struct tty_struct *tty; 1832 __u16 lastBufferLength; 1833 __u16 rxLen; 1834 1835 dbg("%s", __func__); 1836 1837 lastBufferLength = bufferLength + 1; 1838 1839 while (bufferLength > 0) { 1840 /* failsafe incase we get a message that we don't understand */ 1841 if (lastBufferLength == bufferLength) { 1842 dbg("%s - stuck in loop, exiting it.", __func__); 1843 break; 1844 } 1845 lastBufferLength = bufferLength; 1846 1847 switch (edge_serial->rxState) { 1848 case EXPECT_HDR1: 1849 edge_serial->rxHeader1 = *buffer; 1850 ++buffer; 1851 --bufferLength; 1852 1853 if (bufferLength == 0) { 1854 edge_serial->rxState = EXPECT_HDR2; 1855 break; 1856 } 1857 /* otherwise, drop on through */ 1858 case EXPECT_HDR2: 1859 edge_serial->rxHeader2 = *buffer; 1860 ++buffer; 1861 --bufferLength; 1862 1863 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, 1864 edge_serial->rxHeader1, edge_serial->rxHeader2); 1865 /* Process depending on whether this header is 1866 * data or status */ 1867 1868 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1869 /* Decode this status header and go to 1870 * EXPECT_HDR1 (if we can process the status 1871 * with only 2 bytes), or go to EXPECT_HDR3 to 1872 * get the third byte. */ 1873 edge_serial->rxPort = 1874 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1875 edge_serial->rxStatusCode = 1876 IOSP_GET_STATUS_CODE( 1877 edge_serial->rxHeader1); 1878 1879 if (!IOSP_STATUS_IS_2BYTE( 1880 edge_serial->rxStatusCode)) { 1881 /* This status needs additional bytes. 1882 * Save what we have and then wait for 1883 * more data. 1884 */ 1885 edge_serial->rxStatusParam 1886 = edge_serial->rxHeader2; 1887 edge_serial->rxState = EXPECT_HDR3; 1888 break; 1889 } 1890 /* We have all the header bytes, process the 1891 status now */ 1892 process_rcvd_status(edge_serial, 1893 edge_serial->rxHeader2, 0); 1894 edge_serial->rxState = EXPECT_HDR1; 1895 break; 1896 } else { 1897 edge_serial->rxPort = 1898 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1899 edge_serial->rxBytesRemaining = 1900 IOSP_GET_HDR_DATA_LEN( 1901 edge_serial->rxHeader1, 1902 edge_serial->rxHeader2); 1903 dbg("%s - Data for Port %u Len %u", 1904 __func__, 1905 edge_serial->rxPort, 1906 edge_serial->rxBytesRemaining); 1907 1908 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1909 * ASSERT(DevExt->RxBytesRemaining < 1910 * IOSP_MAX_DATA_LENGTH); 1911 */ 1912 1913 if (bufferLength == 0) { 1914 edge_serial->rxState = EXPECT_DATA; 1915 break; 1916 } 1917 /* Else, drop through */ 1918 } 1919 case EXPECT_DATA: /* Expect data */ 1920 if (bufferLength < edge_serial->rxBytesRemaining) { 1921 rxLen = bufferLength; 1922 /* Expect data to start next buffer */ 1923 edge_serial->rxState = EXPECT_DATA; 1924 } else { 1925 /* BufLen >= RxBytesRemaining */ 1926 rxLen = edge_serial->rxBytesRemaining; 1927 /* Start another header next time */ 1928 edge_serial->rxState = EXPECT_HDR1; 1929 } 1930 1931 bufferLength -= rxLen; 1932 edge_serial->rxBytesRemaining -= rxLen; 1933 1934 /* spit this data back into the tty driver if this 1935 port is open */ 1936 if (rxLen) { 1937 port = edge_serial->serial->port[ 1938 edge_serial->rxPort]; 1939 edge_port = usb_get_serial_port_data(port); 1940 if (edge_port->open) { 1941 tty = tty_port_tty_get( 1942 &edge_port->port->port); 1943 if (tty) { 1944 dbg("%s - Sending %d bytes to TTY for port %d", 1945 __func__, rxLen, edge_serial->rxPort); 1946 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1947 tty_kref_put(tty); 1948 } 1949 edge_port->icount.rx += rxLen; 1950 } 1951 buffer += rxLen; 1952 } 1953 break; 1954 1955 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1956 edge_serial->rxHeader3 = *buffer; 1957 ++buffer; 1958 --bufferLength; 1959 1960 /* We have all the header bytes, process the 1961 status now */ 1962 process_rcvd_status(edge_serial, 1963 edge_serial->rxStatusParam, 1964 edge_serial->rxHeader3); 1965 edge_serial->rxState = EXPECT_HDR1; 1966 break; 1967 } 1968 } 1969} 1970 1971 1972/***************************************************************************** 1973 * process_rcvd_status 1974 * this function handles the any status messages received on the 1975 * bulk in pipe. 1976 *****************************************************************************/ 1977static void process_rcvd_status(struct edgeport_serial *edge_serial, 1978 __u8 byte2, __u8 byte3) 1979{ 1980 struct usb_serial_port *port; 1981 struct edgeport_port *edge_port; 1982 struct tty_struct *tty; 1983 __u8 code = edge_serial->rxStatusCode; 1984 1985 /* switch the port pointer to the one being currently talked about */ 1986 port = edge_serial->serial->port[edge_serial->rxPort]; 1987 edge_port = usb_get_serial_port_data(port); 1988 if (edge_port == NULL) { 1989 dev_err(&edge_serial->serial->dev->dev, 1990 "%s - edge_port == NULL for port %d\n", 1991 __func__, edge_serial->rxPort); 1992 return; 1993 } 1994 1995 dbg("%s - port %d", __func__, edge_serial->rxPort); 1996 1997 if (code == IOSP_EXT_STATUS) { 1998 switch (byte2) { 1999 case IOSP_EXT_STATUS_CHASE_RSP: 2000 /* we want to do EXT status regardless of port 2001 * open/closed */ 2002 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", 2003 __func__, edge_serial->rxPort, byte3); 2004 /* Currently, the only EXT_STATUS is Chase, so process 2005 * here instead of one more call to one more subroutine 2006 * If/when more EXT_STATUS, there'll be more work to do 2007 * Also, we currently clear flag and close the port 2008 * regardless of content of above's Byte3. 2009 * We could choose to do something else when Byte3 says 2010 * Timeout on Chase from Edgeport, like wait longer in 2011 * block_until_chase_response, but for now we don't. 2012 */ 2013 edge_port->chaseResponsePending = false; 2014 wake_up(&edge_port->wait_chase); 2015 return; 2016 2017 case IOSP_EXT_STATUS_RX_CHECK_RSP: 2018 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3); 2019 /* Port->RxCheckRsp = true; */ 2020 return; 2021 } 2022 } 2023 2024 if (code == IOSP_STATUS_OPEN_RSP) { 2025 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 2026 edge_port->maxTxCredits = edge_port->txCredits; 2027 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 2028 handle_new_msr(edge_port, byte2); 2029 2030 /* send the current line settings to the port so we are 2031 in sync with any further termios calls */ 2032 tty = tty_port_tty_get(&edge_port->port->port); 2033 if (tty) { 2034 change_port_settings(tty, 2035 edge_port, tty->termios); 2036 tty_kref_put(tty); 2037 } 2038 2039 /* we have completed the open */ 2040 edge_port->openPending = false; 2041 edge_port->open = true; 2042 wake_up(&edge_port->wait_open); 2043 return; 2044 } 2045 2046 /* If port is closed, silently discard all rcvd status. We can 2047 * have cases where buffered status is received AFTER the close 2048 * port command is sent to the Edgeport. 2049 */ 2050 if (!edge_port->open || edge_port->closePending) 2051 return; 2052 2053 switch (code) { 2054 /* Not currently sent by Edgeport */ 2055 case IOSP_STATUS_LSR: 2056 dbg("%s - Port %u LSR Status = %02x", 2057 __func__, edge_serial->rxPort, byte2); 2058 handle_new_lsr(edge_port, false, byte2, 0); 2059 break; 2060 2061 case IOSP_STATUS_LSR_DATA: 2062 dbg("%s - Port %u LSR Status = %02x, Data = %02x", 2063 __func__, edge_serial->rxPort, byte2, byte3); 2064 /* byte2 is LSR Register */ 2065 /* byte3 is broken data byte */ 2066 handle_new_lsr(edge_port, true, byte2, byte3); 2067 break; 2068 /* 2069 * case IOSP_EXT_4_STATUS: 2070 * dbg("%s - Port %u LSR Status = %02x Data = %02x", 2071 * __func__, edge_serial->rxPort, byte2, byte3); 2072 * break; 2073 */ 2074 case IOSP_STATUS_MSR: 2075 dbg("%s - Port %u MSR Status = %02x", 2076 __func__, edge_serial->rxPort, byte2); 2077 /* 2078 * Process this new modem status and generate appropriate 2079 * events, etc, based on the new status. This routine 2080 * also saves the MSR in Port->ShadowMsr. 2081 */ 2082 handle_new_msr(edge_port, byte2); 2083 break; 2084 2085 default: 2086 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code); 2087 break; 2088 } 2089 return; 2090} 2091 2092 2093/***************************************************************************** 2094 * edge_tty_recv 2095 * this function passes data on to the tty flip buffer 2096 *****************************************************************************/ 2097static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 2098 unsigned char *data, int length) 2099{ 2100 int cnt; 2101 2102 do { 2103 cnt = tty_buffer_request_room(tty, length); 2104 if (cnt < length) { 2105 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2106 __func__, length - cnt); 2107 if (cnt == 0) 2108 break; 2109 } 2110 tty_insert_flip_string(tty, data, cnt); 2111 data += cnt; 2112 length -= cnt; 2113 } while (length > 0); 2114 2115 tty_flip_buffer_push(tty); 2116} 2117 2118 2119/***************************************************************************** 2120 * handle_new_msr 2121 * this function handles any change to the msr register for a port. 2122 *****************************************************************************/ 2123static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2124{ 2125 struct async_icount *icount; 2126 2127 dbg("%s %02x", __func__, newMsr); 2128 2129 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2130 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2131 icount = &edge_port->icount; 2132 2133 /* update input line counters */ 2134 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2135 icount->cts++; 2136 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2137 icount->dsr++; 2138 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2139 icount->dcd++; 2140 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2141 icount->rng++; 2142 wake_up_interruptible(&edge_port->delta_msr_wait); 2143 } 2144 2145 /* Save the new modem status */ 2146 edge_port->shadowMSR = newMsr & 0xf0; 2147 2148 return; 2149} 2150 2151 2152/***************************************************************************** 2153 * handle_new_lsr 2154 * this function handles any change to the lsr register for a port. 2155 *****************************************************************************/ 2156static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2157 __u8 lsr, __u8 data) 2158{ 2159 __u8 newLsr = (__u8) (lsr & (__u8) 2160 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2161 struct async_icount *icount; 2162 2163 dbg("%s - %02x", __func__, newLsr); 2164 2165 edge_port->shadowLSR = lsr; 2166 2167 if (newLsr & LSR_BREAK) { 2168 /* 2169 * Parity and Framing errors only count if they 2170 * occur exclusive of a break being 2171 * received. 2172 */ 2173 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2174 } 2175 2176 /* Place LSR data byte into Rx buffer */ 2177 if (lsrData) { 2178 struct tty_struct *tty = 2179 tty_port_tty_get(&edge_port->port->port); 2180 if (tty) { 2181 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 2182 tty_kref_put(tty); 2183 } 2184 } 2185 /* update input line counters */ 2186 icount = &edge_port->icount; 2187 if (newLsr & LSR_BREAK) 2188 icount->brk++; 2189 if (newLsr & LSR_OVER_ERR) 2190 icount->overrun++; 2191 if (newLsr & LSR_PAR_ERR) 2192 icount->parity++; 2193 if (newLsr & LSR_FRM_ERR) 2194 icount->frame++; 2195 2196 return; 2197} 2198 2199 2200/**************************************************************************** 2201 * sram_write 2202 * writes a number of bytes to the Edgeport device's sram starting at the 2203 * given address. 2204 * If successful returns the number of bytes written, otherwise it returns 2205 * a negative error number of the problem. 2206 ****************************************************************************/ 2207static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2208 __u16 length, const __u8 *data) 2209{ 2210 int result; 2211 __u16 current_length; 2212 unsigned char *transfer_buffer; 2213 2214 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2215 2216 transfer_buffer = kmalloc(64, GFP_KERNEL); 2217 if (!transfer_buffer) { 2218 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2219 __func__, 64); 2220 return -ENOMEM; 2221 } 2222 2223 /* need to split these writes up into 64 byte chunks */ 2224 result = 0; 2225 while (length > 0) { 2226 if (length > 64) 2227 current_length = 64; 2228 else 2229 current_length = length; 2230 2231/* dbg("%s - writing %x, %x, %d", __func__, 2232 extAddr, addr, current_length); */ 2233 memcpy(transfer_buffer, data, current_length); 2234 result = usb_control_msg(serial->dev, 2235 usb_sndctrlpipe(serial->dev, 0), 2236 USB_REQUEST_ION_WRITE_RAM, 2237 0x40, addr, extAddr, transfer_buffer, 2238 current_length, 300); 2239 if (result < 0) 2240 break; 2241 length -= current_length; 2242 addr += current_length; 2243 data += current_length; 2244 } 2245 2246 kfree(transfer_buffer); 2247 return result; 2248} 2249 2250 2251/**************************************************************************** 2252 * rom_write 2253 * writes a number of bytes to the Edgeport device's ROM starting at the 2254 * given address. 2255 * If successful returns the number of bytes written, otherwise it returns 2256 * a negative error number of the problem. 2257 ****************************************************************************/ 2258static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2259 __u16 length, const __u8 *data) 2260{ 2261 int result; 2262 __u16 current_length; 2263 unsigned char *transfer_buffer; 2264 2265/* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */ 2266 2267 transfer_buffer = kmalloc(64, GFP_KERNEL); 2268 if (!transfer_buffer) { 2269 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2270 __func__, 64); 2271 return -ENOMEM; 2272 } 2273 2274 /* need to split these writes up into 64 byte chunks */ 2275 result = 0; 2276 while (length > 0) { 2277 if (length > 64) 2278 current_length = 64; 2279 else 2280 current_length = length; 2281/* dbg("%s - writing %x, %x, %d", __func__, 2282 extAddr, addr, current_length); */ 2283 memcpy(transfer_buffer, data, current_length); 2284 result = usb_control_msg(serial->dev, 2285 usb_sndctrlpipe(serial->dev, 0), 2286 USB_REQUEST_ION_WRITE_ROM, 0x40, 2287 addr, extAddr, 2288 transfer_buffer, current_length, 300); 2289 if (result < 0) 2290 break; 2291 length -= current_length; 2292 addr += current_length; 2293 data += current_length; 2294 } 2295 2296 kfree(transfer_buffer); 2297 return result; 2298} 2299 2300 2301/**************************************************************************** 2302 * rom_read 2303 * reads a number of bytes from the Edgeport device starting at the given 2304 * address. 2305 * If successful returns the number of bytes read, otherwise it returns 2306 * a negative error number of the problem. 2307 ****************************************************************************/ 2308static int rom_read(struct usb_serial *serial, __u16 extAddr, 2309 __u16 addr, __u16 length, __u8 *data) 2310{ 2311 int result; 2312 __u16 current_length; 2313 unsigned char *transfer_buffer; 2314 2315 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2316 2317 transfer_buffer = kmalloc(64, GFP_KERNEL); 2318 if (!transfer_buffer) { 2319 dev_err(&serial->dev->dev, 2320 "%s - kmalloc(%d) failed.\n", __func__, 64); 2321 return -ENOMEM; 2322 } 2323 2324 /* need to split these reads up into 64 byte chunks */ 2325 result = 0; 2326 while (length > 0) { 2327 if (length > 64) 2328 current_length = 64; 2329 else 2330 current_length = length; 2331/* dbg("%s - %x, %x, %d", __func__, 2332 extAddr, addr, current_length); */ 2333 result = usb_control_msg(serial->dev, 2334 usb_rcvctrlpipe(serial->dev, 0), 2335 USB_REQUEST_ION_READ_ROM, 2336 0xC0, addr, extAddr, transfer_buffer, 2337 current_length, 300); 2338 if (result < 0) 2339 break; 2340 memcpy(data, transfer_buffer, current_length); 2341 length -= current_length; 2342 addr += current_length; 2343 data += current_length; 2344 } 2345 2346 kfree(transfer_buffer); 2347 return result; 2348} 2349 2350 2351/**************************************************************************** 2352 * send_iosp_ext_cmd 2353 * Is used to send a IOSP message to the Edgeport device 2354 ****************************************************************************/ 2355static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2356 __u8 command, __u8 param) 2357{ 2358 unsigned char *buffer; 2359 unsigned char *currentCommand; 2360 int length = 0; 2361 int status = 0; 2362 2363 dbg("%s - %d, %d", __func__, command, param); 2364 2365 buffer = kmalloc(10, GFP_ATOMIC); 2366 if (!buffer) { 2367 dev_err(&edge_port->port->dev, 2368 "%s - kmalloc(%d) failed.\n", __func__, 10); 2369 return -ENOMEM; 2370 } 2371 2372 currentCommand = buffer; 2373 2374 MAKE_CMD_EXT_CMD(¤tCommand, &length, 2375 edge_port->port->number - edge_port->port->serial->minor, 2376 command, param); 2377 2378 status = write_cmd_usb(edge_port, buffer, length); 2379 if (status) { 2380 /* something bad happened, let's free up the memory */ 2381 kfree(buffer); 2382 } 2383 2384 return status; 2385} 2386 2387 2388/***************************************************************************** 2389 * write_cmd_usb 2390 * this function writes the given buffer out to the bulk write endpoint. 2391 *****************************************************************************/ 2392static int write_cmd_usb(struct edgeport_port *edge_port, 2393 unsigned char *buffer, int length) 2394{ 2395 struct edgeport_serial *edge_serial = 2396 usb_get_serial_data(edge_port->port->serial); 2397 int status = 0; 2398 struct urb *urb; 2399 int timeout; 2400 2401 usb_serial_debug_data(debug, &edge_port->port->dev, 2402 __func__, length, buffer); 2403 2404 /* Allocate our next urb */ 2405 urb = usb_alloc_urb(0, GFP_ATOMIC); 2406 if (!urb) 2407 return -ENOMEM; 2408 2409 atomic_inc(&CmdUrbs); 2410 dbg("%s - ALLOCATE URB %p (outstanding %d)", 2411 __func__, urb, atomic_read(&CmdUrbs)); 2412 2413 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2414 usb_sndbulkpipe(edge_serial->serial->dev, 2415 edge_serial->bulk_out_endpoint), 2416 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2417 2418 edge_port->commandPending = true; 2419 status = usb_submit_urb(urb, GFP_ATOMIC); 2420 2421 if (status) { 2422 /* something went wrong */ 2423 dev_err(&edge_port->port->dev, 2424 "%s - usb_submit_urb(write command) failed, status = %d\n", 2425 __func__, status); 2426 usb_kill_urb(urb); 2427 usb_free_urb(urb); 2428 atomic_dec(&CmdUrbs); 2429 return status; 2430 } 2431 2432 /* wait for command to finish */ 2433 timeout = COMMAND_TIMEOUT; 2434#if 0 2435 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2436 2437 if (edge_port->commandPending) { 2438 /* command timed out */ 2439 dbg("%s - command timed out", __func__); 2440 status = -EINVAL; 2441 } 2442#endif 2443 return status; 2444} 2445 2446 2447/***************************************************************************** 2448 * send_cmd_write_baud_rate 2449 * this function sends the proper command to change the baud rate of the 2450 * specified port. 2451 *****************************************************************************/ 2452static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2453 int baudRate) 2454{ 2455 struct edgeport_serial *edge_serial = 2456 usb_get_serial_data(edge_port->port->serial); 2457 unsigned char *cmdBuffer; 2458 unsigned char *currCmd; 2459 int cmdLen = 0; 2460 int divisor; 2461 int status; 2462 unsigned char number = 2463 edge_port->port->number - edge_port->port->serial->minor; 2464 2465 if (edge_serial->is_epic && 2466 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2467 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2468 edge_port->port->number, baudRate); 2469 return 0; 2470 } 2471 2472 dbg("%s - port = %d, baud = %d", __func__, 2473 edge_port->port->number, baudRate); 2474 2475 status = calc_baud_rate_divisor(baudRate, &divisor); 2476 if (status) { 2477 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", 2478 __func__); 2479 return status; 2480 } 2481 2482 /* Alloc memory for the string of commands. */ 2483 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2484 if (!cmdBuffer) { 2485 dev_err(&edge_port->port->dev, 2486 "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2487 return -ENOMEM; 2488 } 2489 currCmd = cmdBuffer; 2490 2491 /* Enable access to divisor latch */ 2492 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2493 2494 /* Write the divisor itself */ 2495 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2496 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2497 2498 /* Restore original value to disable access to divisor latch */ 2499 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2500 edge_port->shadowLCR); 2501 2502 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2503 if (status) { 2504 /* something bad happened, let's free up the memory */ 2505 kfree(cmdBuffer); 2506 } 2507 2508 return status; 2509} 2510 2511 2512/***************************************************************************** 2513 * calc_baud_rate_divisor 2514 * this function calculates the proper baud rate divisor for the specified 2515 * baud rate. 2516 *****************************************************************************/ 2517static int calc_baud_rate_divisor(int baudrate, int *divisor) 2518{ 2519 int i; 2520 __u16 custom; 2521 2522 2523 dbg("%s - %d", __func__, baudrate); 2524 2525 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2526 if (divisor_table[i].BaudRate == baudrate) { 2527 *divisor = divisor_table[i].Divisor; 2528 return 0; 2529 } 2530 } 2531 2532 /* We have tried all of the standard baud rates 2533 * lets try to calculate the divisor for this baud rate 2534 * Make sure the baud rate is reasonable */ 2535 if (baudrate > 50 && baudrate < 230400) { 2536 /* get divisor */ 2537 custom = (__u16)((230400L + baudrate/2) / baudrate); 2538 2539 *divisor = custom; 2540 2541 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom); 2542 return 0; 2543 } 2544 2545 return -1; 2546} 2547 2548 2549/***************************************************************************** 2550 * send_cmd_write_uart_register 2551 * this function builds up a uart register message and sends to to the device. 2552 *****************************************************************************/ 2553static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2554 __u8 regNum, __u8 regValue) 2555{ 2556 struct edgeport_serial *edge_serial = 2557 usb_get_serial_data(edge_port->port->serial); 2558 unsigned char *cmdBuffer; 2559 unsigned char *currCmd; 2560 unsigned long cmdLen = 0; 2561 int status; 2562 2563 dbg("%s - write to %s register 0x%02x", 2564 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2565 2566 if (edge_serial->is_epic && 2567 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2568 regNum == MCR) { 2569 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2570 return 0; 2571 } 2572 2573 if (edge_serial->is_epic && 2574 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2575 regNum == LCR) { 2576 dbg("SendCmdWriteUartReg - Not writing to LCR Register"); 2577 return 0; 2578 } 2579 2580 /* Alloc memory for the string of commands. */ 2581 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2582 if (cmdBuffer == NULL) 2583 return -ENOMEM; 2584 2585 currCmd = cmdBuffer; 2586 2587 /* Build a cmd in the buffer to write the given register */ 2588 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, 2589 edge_port->port->number - edge_port->port->serial->minor, 2590 regNum, regValue); 2591 2592 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2593 if (status) { 2594 /* something bad happened, let's free up the memory */ 2595 kfree(cmdBuffer); 2596 } 2597 2598 return status; 2599} 2600 2601 2602/***************************************************************************** 2603 * change_port_settings 2604 * This routine is called to set the UART on the device to match the 2605 * specified new settings. 2606 *****************************************************************************/ 2607 2608static void change_port_settings(struct tty_struct *tty, 2609 struct edgeport_port *edge_port, struct ktermios *old_termios) 2610{ 2611 struct edgeport_serial *edge_serial = 2612 usb_get_serial_data(edge_port->port->serial); 2613 int baud; 2614 unsigned cflag; 2615 __u8 mask = 0xff; 2616 __u8 lData; 2617 __u8 lParity; 2618 __u8 lStop; 2619 __u8 rxFlow; 2620 __u8 txFlow; 2621 int status; 2622 2623 dbg("%s - port %d", __func__, edge_port->port->number); 2624 2625 if (!edge_port->open && 2626 !edge_port->openPending) { 2627 dbg("%s - port not opened", __func__); 2628 return; 2629 } 2630 2631 cflag = tty->termios->c_cflag; 2632 2633 switch (cflag & CSIZE) { 2634 case CS5: 2635 lData = LCR_BITS_5; mask = 0x1f; 2636 dbg("%s - data bits = 5", __func__); 2637 break; 2638 case CS6: 2639 lData = LCR_BITS_6; mask = 0x3f; 2640 dbg("%s - data bits = 6", __func__); 2641 break; 2642 case CS7: 2643 lData = LCR_BITS_7; mask = 0x7f; 2644 dbg("%s - data bits = 7", __func__); 2645 break; 2646 default: 2647 case CS8: 2648 lData = LCR_BITS_8; 2649 dbg("%s - data bits = 8", __func__); 2650 break; 2651 } 2652 2653 lParity = LCR_PAR_NONE; 2654 if (cflag & PARENB) { 2655 if (cflag & CMSPAR) { 2656 if (cflag & PARODD) { 2657 lParity = LCR_PAR_MARK; 2658 dbg("%s - parity = mark", __func__); 2659 } else { 2660 lParity = LCR_PAR_SPACE; 2661 dbg("%s - parity = space", __func__); 2662 } 2663 } else if (cflag & PARODD) { 2664 lParity = LCR_PAR_ODD; 2665 dbg("%s - parity = odd", __func__); 2666 } else { 2667 lParity = LCR_PAR_EVEN; 2668 dbg("%s - parity = even", __func__); 2669 } 2670 } else { 2671 dbg("%s - parity = none", __func__); 2672 } 2673 2674 if (cflag & CSTOPB) { 2675 lStop = LCR_STOP_2; 2676 dbg("%s - stop bits = 2", __func__); 2677 } else { 2678 lStop = LCR_STOP_1; 2679 dbg("%s - stop bits = 1", __func__); 2680 } 2681 2682 /* figure out the flow control settings */ 2683 rxFlow = txFlow = 0x00; 2684 if (cflag & CRTSCTS) { 2685 rxFlow |= IOSP_RX_FLOW_RTS; 2686 txFlow |= IOSP_TX_FLOW_CTS; 2687 dbg("%s - RTS/CTS is enabled", __func__); 2688 } else { 2689 dbg("%s - RTS/CTS is disabled", __func__); 2690 } 2691 2692 /* if we are implementing XON/XOFF, set the start and stop character 2693 in the device */ 2694 if (I_IXOFF(tty) || I_IXON(tty)) { 2695 unsigned char stop_char = STOP_CHAR(tty); 2696 unsigned char start_char = START_CHAR(tty); 2697 2698 if ((!edge_serial->is_epic) || 2699 ((edge_serial->is_epic) && 2700 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2701 send_iosp_ext_cmd(edge_port, 2702 IOSP_CMD_SET_XON_CHAR, start_char); 2703 send_iosp_ext_cmd(edge_port, 2704 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2705 } 2706 2707 /* if we are implementing INBOUND XON/XOFF */ 2708 if (I_IXOFF(tty)) { 2709 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2710 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2711 __func__, start_char, stop_char); 2712 } else { 2713 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2714 } 2715 2716 /* if we are implementing OUTBOUND XON/XOFF */ 2717 if (I_IXON(tty)) { 2718 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2719 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2720 __func__, start_char, stop_char); 2721 } else { 2722 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2723 } 2724 } 2725 2726 /* Set flow control to the configured value */ 2727 if ((!edge_serial->is_epic) || 2728 ((edge_serial->is_epic) && 2729 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2730 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2731 if ((!edge_serial->is_epic) || 2732 ((edge_serial->is_epic) && 2733 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2734 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2735 2736 2737 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2738 edge_port->shadowLCR |= (lData | lParity | lStop); 2739 2740 edge_port->validDataMask = mask; 2741 2742 /* Send the updated LCR value to the EdgePort */ 2743 status = send_cmd_write_uart_register(edge_port, LCR, 2744 edge_port->shadowLCR); 2745 if (status != 0) 2746 return; 2747 2748 /* set up the MCR register and send it to the EdgePort */ 2749 edge_port->shadowMCR = MCR_MASTER_IE; 2750 if (cflag & CBAUD) 2751 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2752 2753 status = send_cmd_write_uart_register(edge_port, MCR, 2754 edge_port->shadowMCR); 2755 if (status != 0) 2756 return; 2757 2758 /* Determine divisor based on baud rate */ 2759 baud = tty_get_baud_rate(tty); 2760 if (!baud) { 2761 /* pick a default, any default... */ 2762 baud = 9600; 2763 } 2764 2765 dbg("%s - baud rate = %d", __func__, baud); 2766 status = send_cmd_write_baud_rate(edge_port, baud); 2767 if (status == -1) { 2768 /* Speed change was not possible - put back the old speed */ 2769 baud = tty_termios_baud_rate(old_termios); 2770 tty_encode_baud_rate(tty, baud, baud); 2771 } 2772 return; 2773} 2774 2775 2776/**************************************************************************** 2777 * unicode_to_ascii 2778 * Turns a string from Unicode into ASCII. 2779 * Doesn't do a good job with any characters that are outside the normal 2780 * ASCII range, but it's only for debugging... 2781 * NOTE: expects the unicode in LE format 2782 ****************************************************************************/ 2783static void unicode_to_ascii(char *string, int buflen, 2784 __le16 *unicode, int unicode_size) 2785{ 2786 int i; 2787 2788 if (buflen <= 0) /* never happens, but... */ 2789 return; 2790 --buflen; /* space for nul */ 2791 2792 for (i = 0; i < unicode_size; i++) { 2793 if (i >= buflen) 2794 break; 2795 string[i] = (char)(le16_to_cpu(unicode[i])); 2796 } 2797 string[i] = 0x00; 2798} 2799 2800 2801/**************************************************************************** 2802 * get_manufacturing_desc 2803 * reads in the manufacturing descriptor and stores it into the serial 2804 * structure. 2805 ****************************************************************************/ 2806static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2807{ 2808 int response; 2809 2810 dbg("getting manufacturer descriptor"); 2811 2812 response = rom_read(edge_serial->serial, 2813 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2814 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2815 EDGE_MANUF_DESC_LEN, 2816 (__u8 *)(&edge_serial->manuf_descriptor)); 2817 2818 if (response < 1) 2819 dev_err(&edge_serial->serial->dev->dev, 2820 "error in getting manufacturer descriptor\n"); 2821 else { 2822 char string[30]; 2823 dbg("**Manufacturer Descriptor"); 2824 dbg(" RomSize: %dK", 2825 edge_serial->manuf_descriptor.RomSize); 2826 dbg(" RamSize: %dK", 2827 edge_serial->manuf_descriptor.RamSize); 2828 dbg(" CpuRev: %d", 2829 edge_serial->manuf_descriptor.CpuRev); 2830 dbg(" BoardRev: %d", 2831 edge_serial->manuf_descriptor.BoardRev); 2832 dbg(" NumPorts: %d", 2833 edge_serial->manuf_descriptor.NumPorts); 2834 dbg(" DescDate: %d/%d/%d", 2835 edge_serial->manuf_descriptor.DescDate[0], 2836 edge_serial->manuf_descriptor.DescDate[1], 2837 edge_serial->manuf_descriptor.DescDate[2]+1900); 2838 unicode_to_ascii(string, sizeof(string), 2839 edge_serial->manuf_descriptor.SerialNumber, 2840 edge_serial->manuf_descriptor.SerNumLength/2); 2841 dbg(" SerialNumber: %s", string); 2842 unicode_to_ascii(string, sizeof(string), 2843 edge_serial->manuf_descriptor.AssemblyNumber, 2844 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2845 dbg(" AssemblyNumber: %s", string); 2846 unicode_to_ascii(string, sizeof(string), 2847 edge_serial->manuf_descriptor.OemAssyNumber, 2848 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2849 dbg(" OemAssyNumber: %s", string); 2850 dbg(" UartType: %d", 2851 edge_serial->manuf_descriptor.UartType); 2852 dbg(" IonPid: %d", 2853 edge_serial->manuf_descriptor.IonPid); 2854 dbg(" IonConfig: %d", 2855 edge_serial->manuf_descriptor.IonConfig); 2856 } 2857} 2858 2859 2860/**************************************************************************** 2861 * get_boot_desc 2862 * reads in the bootloader descriptor and stores it into the serial 2863 * structure. 2864 ****************************************************************************/ 2865static void get_boot_desc(struct edgeport_serial *edge_serial) 2866{ 2867 int response; 2868 2869 dbg("getting boot descriptor"); 2870 2871 response = rom_read(edge_serial->serial, 2872 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2873 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2874 EDGE_BOOT_DESC_LEN, 2875 (__u8 *)(&edge_serial->boot_descriptor)); 2876 2877 if (response < 1) 2878 dev_err(&edge_serial->serial->dev->dev, 2879 "error in getting boot descriptor\n"); 2880 else { 2881 dbg("**Boot Descriptor:"); 2882 dbg(" BootCodeLength: %d", 2883 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2884 dbg(" MajorVersion: %d", 2885 edge_serial->boot_descriptor.MajorVersion); 2886 dbg(" MinorVersion: %d", 2887 edge_serial->boot_descriptor.MinorVersion); 2888 dbg(" BuildNumber: %d", 2889 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2890 dbg(" Capabilities: 0x%x", 2891 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2892 dbg(" UConfig0: %d", 2893 edge_serial->boot_descriptor.UConfig0); 2894 dbg(" UConfig1: %d", 2895 edge_serial->boot_descriptor.UConfig1); 2896 } 2897} 2898 2899 2900/**************************************************************************** 2901 * load_application_firmware 2902 * This is called to load the application firmware to the device 2903 ****************************************************************************/ 2904static void load_application_firmware(struct edgeport_serial *edge_serial) 2905{ 2906 const struct ihex_binrec *rec; 2907 const struct firmware *fw; 2908 const char *fw_name; 2909 const char *fw_info; 2910 int response; 2911 __u32 Operaddr; 2912 __u16 build; 2913 2914 switch (edge_serial->product_info.iDownloadFile) { 2915 case EDGE_DOWNLOAD_FILE_I930: 2916 fw_info = "downloading firmware version (930)"; 2917 fw_name = "edgeport/down.fw"; 2918 break; 2919 2920 case EDGE_DOWNLOAD_FILE_80251: 2921 fw_info = "downloading firmware version (80251)"; 2922 fw_name = "edgeport/down2.fw"; 2923 break; 2924 2925 case EDGE_DOWNLOAD_FILE_NONE: 2926 dbg ("No download file specified, skipping download\n"); 2927 return; 2928 2929 default: 2930 return; 2931 } 2932 2933 response = request_ihex_firmware(&fw, fw_name, 2934 &edge_serial->serial->dev->dev); 2935 if (response) { 2936 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 2937 fw_name, response); 2938 return; 2939 } 2940 2941 rec = (const struct ihex_binrec *)fw->data; 2942 build = (rec->data[2] << 8) | rec->data[3]; 2943 2944 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build); 2945 2946 edge_serial->product_info.FirmwareMajorVersion = fw->data[0]; 2947 edge_serial->product_info.FirmwareMinorVersion = fw->data[1]; 2948 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2949 2950 for (rec = ihex_next_binrec(rec); rec; 2951 rec = ihex_next_binrec(rec)) { 2952 Operaddr = be32_to_cpu(rec->addr); 2953 response = sram_write(edge_serial->serial, 2954 Operaddr >> 16, 2955 Operaddr & 0xFFFF, 2956 be16_to_cpu(rec->len), 2957 &rec->data[0]); 2958 if (response < 0) { 2959 dev_err(&edge_serial->serial->dev->dev, 2960 "sram_write failed (%x, %x, %d)\n", 2961 Operaddr >> 16, Operaddr & 0xFFFF, 2962 be16_to_cpu(rec->len)); 2963 break; 2964 } 2965 } 2966 2967 dbg("sending exec_dl_code"); 2968 response = usb_control_msg (edge_serial->serial->dev, 2969 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2970 USB_REQUEST_ION_EXEC_DL_CODE, 2971 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2972 2973 release_firmware(fw); 2974 return; 2975} 2976 2977 2978/**************************************************************************** 2979 * edge_startup 2980 ****************************************************************************/ 2981static int edge_startup(struct usb_serial *serial) 2982{ 2983 struct edgeport_serial *edge_serial; 2984 struct edgeport_port *edge_port; 2985 struct usb_device *dev; 2986 int i, j; 2987 int response; 2988 bool interrupt_in_found; 2989 bool bulk_in_found; 2990 bool bulk_out_found; 2991 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2992 EDGE_COMPATIBILITY_MASK1, 2993 EDGE_COMPATIBILITY_MASK2 }; 2994 2995 dev = serial->dev; 2996 2997 /* create our private serial structure */ 2998 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2999 if (edge_serial == NULL) { 3000 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 3001 return -ENOMEM; 3002 } 3003 spin_lock_init(&edge_serial->es_lock); 3004 edge_serial->serial = serial; 3005 usb_set_serial_data(serial, edge_serial); 3006 3007 /* get the name for the device from the device */ 3008 i = get_string(dev, dev->descriptor.iManufacturer, 3009 &edge_serial->name[0], MAX_NAME_LEN+1); 3010 edge_serial->name[i++] = ' '; 3011 get_string(dev, dev->descriptor.iProduct, 3012 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 3013 3014 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 3015 3016 /* Read the epic descriptor */ 3017 if (get_epic_descriptor(edge_serial) <= 0) { 3018 /* memcpy descriptor to Supports structures */ 3019 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 3020 sizeof(struct edge_compatibility_bits)); 3021 3022 /* get the manufacturing descriptor for this device */ 3023 get_manufacturing_desc(edge_serial); 3024 3025 /* get the boot descriptor */ 3026 get_boot_desc(edge_serial); 3027 3028 get_product_info(edge_serial); 3029 } 3030 3031 /* set the number of ports from the manufacturing description */ 3032 /* serial->num_ports = serial->product_info.NumPorts; */ 3033 if ((!edge_serial->is_epic) && 3034 (edge_serial->product_info.NumPorts != serial->num_ports)) { 3035 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 3036 "vs. core thinking we have %d ports, email " 3037 "greg@kroah.com this information.\n", 3038 edge_serial->product_info.NumPorts, 3039 serial->num_ports); 3040 } 3041 3042 dbg("%s - time 1 %ld", __func__, jiffies); 3043 3044 /* If not an EPiC device */ 3045 if (!edge_serial->is_epic) { 3046 /* now load the application firmware into this device */ 3047 load_application_firmware(edge_serial); 3048 3049 dbg("%s - time 2 %ld", __func__, jiffies); 3050 3051 /* Check current Edgeport EEPROM and update if necessary */ 3052 update_edgeport_E2PROM(edge_serial); 3053 3054 dbg("%s - time 3 %ld", __func__, jiffies); 3055 3056 /* set the configuration to use #1 */ 3057/* dbg("set_configuration 1"); */ 3058/* usb_set_configuration (dev, 1); */ 3059 } 3060 dbg(" FirmwareMajorVersion %d.%d.%d", 3061 edge_serial->product_info.FirmwareMajorVersion, 3062 edge_serial->product_info.FirmwareMinorVersion, 3063 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 3064 3065 /* we set up the pointers to the endpoints in the edge_open function, 3066 * as the structures aren't created yet. */ 3067 3068 /* set up our port private structures */ 3069 for (i = 0; i < serial->num_ports; ++i) { 3070 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL); 3071 if (edge_port == NULL) { 3072 dev_err(&serial->dev->dev, "%s - Out of memory\n", 3073 __func__); 3074 for (j = 0; j < i; ++j) { 3075 kfree(usb_get_serial_port_data(serial->port[j])); 3076 usb_set_serial_port_data(serial->port[j], 3077 NULL); 3078 } 3079 usb_set_serial_data(serial, NULL); 3080 kfree(edge_serial); 3081 return -ENOMEM; 3082 } 3083 memset(edge_port, 0, sizeof(struct edgeport_port)); 3084 spin_lock_init(&edge_port->ep_lock); 3085 edge_port->port = serial->port[i]; 3086 usb_set_serial_port_data(serial->port[i], edge_port); 3087 } 3088 3089 response = 0; 3090 3091 if (edge_serial->is_epic) { 3092 /* EPIC thing, set up our interrupt polling now and our read 3093 * urb, so that the device knows it really is connected. */ 3094 interrupt_in_found = bulk_in_found = bulk_out_found = false; 3095 for (i = 0; i < serial->interface->altsetting[0] 3096 .desc.bNumEndpoints; ++i) { 3097 struct usb_endpoint_descriptor *endpoint; 3098 int buffer_size; 3099 3100 endpoint = &serial->interface->altsetting[0]. 3101 endpoint[i].desc; 3102 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 3103 if (!interrupt_in_found && 3104 (usb_endpoint_is_int_in(endpoint))) { 3105 /* we found a interrupt in endpoint */ 3106 dbg("found interrupt in"); 3107 3108 /* not set up yet, so do it now */ 3109 edge_serial->interrupt_read_urb = 3110 usb_alloc_urb(0, GFP_KERNEL); 3111 if (!edge_serial->interrupt_read_urb) { 3112 dev_err(&dev->dev, "out of memory\n"); 3113 return -ENOMEM; 3114 } 3115 edge_serial->interrupt_in_buffer = 3116 kmalloc(buffer_size, GFP_KERNEL); 3117 if (!edge_serial->interrupt_in_buffer) { 3118 dev_err(&dev->dev, "out of memory\n"); 3119 usb_free_urb(edge_serial->interrupt_read_urb); 3120 return -ENOMEM; 3121 } 3122 edge_serial->interrupt_in_endpoint = 3123 endpoint->bEndpointAddress; 3124 3125 /* set up our interrupt urb */ 3126 usb_fill_int_urb( 3127 edge_serial->interrupt_read_urb, 3128 dev, 3129 usb_rcvintpipe(dev, 3130 endpoint->bEndpointAddress), 3131 edge_serial->interrupt_in_buffer, 3132 buffer_size, 3133 edge_interrupt_callback, 3134 edge_serial, 3135 endpoint->bInterval); 3136 3137 interrupt_in_found = true; 3138 } 3139 3140 if (!bulk_in_found && 3141 (usb_endpoint_is_bulk_in(endpoint))) { 3142 /* we found a bulk in endpoint */ 3143 dbg("found bulk in"); 3144 3145 /* not set up yet, so do it now */ 3146 edge_serial->read_urb = 3147 usb_alloc_urb(0, GFP_KERNEL); 3148 if (!edge_serial->read_urb) { 3149 dev_err(&dev->dev, "out of memory\n"); 3150 return -ENOMEM; 3151 } 3152 edge_serial->bulk_in_buffer = 3153 kmalloc(buffer_size, GFP_KERNEL); 3154 if (!edge_serial->bulk_in_buffer) { 3155 dev_err(&dev->dev, "out of memory\n"); 3156 usb_free_urb(edge_serial->read_urb); 3157 return -ENOMEM; 3158 } 3159 edge_serial->bulk_in_endpoint = 3160 endpoint->bEndpointAddress; 3161 3162 /* set up our bulk in urb */ 3163 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3164 usb_rcvbulkpipe(dev, 3165 endpoint->bEndpointAddress), 3166 edge_serial->bulk_in_buffer, 3167 le16_to_cpu(endpoint->wMaxPacketSize), 3168 edge_bulk_in_callback, 3169 edge_serial); 3170 bulk_in_found = true; 3171 } 3172 3173 if (!bulk_out_found && 3174 (usb_endpoint_is_bulk_out(endpoint))) { 3175 /* we found a bulk out endpoint */ 3176 dbg("found bulk out"); 3177 edge_serial->bulk_out_endpoint = 3178 endpoint->bEndpointAddress; 3179 bulk_out_found = true; 3180 } 3181 } 3182 3183 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3184 dev_err(&dev->dev, "Error - the proper endpoints " 3185 "were not found!\n"); 3186 return -ENODEV; 3187 } 3188 3189 /* start interrupt read for this edgeport this interrupt will 3190 * continue as long as the edgeport is connected */ 3191 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3192 GFP_KERNEL); 3193 if (response) 3194 dev_err(&dev->dev, 3195 "%s - Error %d submitting control urb\n", 3196 __func__, response); 3197 } 3198 return response; 3199} 3200 3201 3202/**************************************************************************** 3203 * edge_shutdown 3204 * This function is called whenever the device is removed from the usb bus. 3205 ****************************************************************************/ 3206static void edge_shutdown(struct usb_serial *serial) 3207{ 3208 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3209 int i; 3210 3211 dbg("%s", __func__); 3212 3213 /* stop reads and writes on all ports */ 3214 for (i = 0; i < serial->num_ports; ++i) { 3215 kfree(usb_get_serial_port_data(serial->port[i])); 3216 usb_set_serial_port_data(serial->port[i], NULL); 3217 } 3218 /* free up our endpoint stuff */ 3219 if (edge_serial->is_epic) { 3220 usb_kill_urb(edge_serial->interrupt_read_urb); 3221 usb_free_urb(edge_serial->interrupt_read_urb); 3222 kfree(edge_serial->interrupt_in_buffer); 3223 3224 usb_kill_urb(edge_serial->read_urb); 3225 usb_free_urb(edge_serial->read_urb); 3226 kfree(edge_serial->bulk_in_buffer); 3227 } 3228 3229 kfree(edge_serial); 3230 usb_set_serial_data(serial, NULL); 3231} 3232 3233 3234/**************************************************************************** 3235 * edgeport_init 3236 * This is called by the module subsystem, or on startup to initialize us 3237 ****************************************************************************/ 3238static int __init edgeport_init(void) 3239{ 3240 int retval; 3241 3242 retval = usb_serial_register(&edgeport_2port_device); 3243 if (retval) 3244 goto failed_2port_device_register; 3245 retval = usb_serial_register(&edgeport_4port_device); 3246 if (retval) 3247 goto failed_4port_device_register; 3248 retval = usb_serial_register(&edgeport_8port_device); 3249 if (retval) 3250 goto failed_8port_device_register; 3251 retval = usb_serial_register(&epic_device); 3252 if (retval) 3253 goto failed_epic_device_register; 3254 retval = usb_register(&io_driver); 3255 if (retval) 3256 goto failed_usb_register; 3257 atomic_set(&CmdUrbs, 0); 3258 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 3259 DRIVER_DESC "\n"); 3260 return 0; 3261 3262failed_usb_register: 3263 usb_serial_deregister(&epic_device); 3264failed_epic_device_register: 3265 usb_serial_deregister(&edgeport_8port_device); 3266failed_8port_device_register: 3267 usb_serial_deregister(&edgeport_4port_device); 3268failed_4port_device_register: 3269 usb_serial_deregister(&edgeport_2port_device); 3270failed_2port_device_register: 3271 return retval; 3272} 3273 3274 3275/**************************************************************************** 3276 * edgeport_exit 3277 * Called when the driver is about to be unloaded. 3278 ****************************************************************************/ 3279static void __exit edgeport_exit (void) 3280{ 3281 usb_deregister(&io_driver); 3282 usb_serial_deregister(&edgeport_2port_device); 3283 usb_serial_deregister(&edgeport_4port_device); 3284 usb_serial_deregister(&edgeport_8port_device); 3285 usb_serial_deregister(&epic_device); 3286} 3287 3288module_init(edgeport_init); 3289module_exit(edgeport_exit); 3290 3291/* Module information */ 3292MODULE_AUTHOR(DRIVER_AUTHOR); 3293MODULE_DESCRIPTION(DRIVER_DESC); 3294MODULE_LICENSE("GPL"); 3295MODULE_FIRMWARE("edgeport/boot.fw"); 3296MODULE_FIRMWARE("edgeport/boot2.fw"); 3297MODULE_FIRMWARE("edgeport/down.fw"); 3298MODULE_FIRMWARE("edgeport/down2.fw"); 3299 3300module_param(debug, bool, S_IRUGO | S_IWUSR); 3301MODULE_PARM_DESC(debug, "Debug enabled or not"); 3302 3303module_param(low_latency, bool, S_IRUGO | S_IWUSR); 3304MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 3305