io_edgeport.c revision 6e8cf7751f9fb913095d6142d068f41fbf0424bb
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 <asm/uaccess.h> 46#include <linux/usb.h> 47#include <linux/usb/serial.h> 48#include "io_edgeport.h" 49#include "io_ionsp.h" /* info for the iosp messages */ 50#include "io_16654.h" /* 16654 UART defines */ 51 52/* 53 * Version Information 54 */ 55#define DRIVER_VERSION "v2.7" 56#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 57#define DRIVER_DESC "Edgeport USB Serial Driver" 58 59/* First, the latest boot code - for first generation edgeports */ 60#define IMAGE_ARRAY_NAME BootCodeImage_GEN1 61#define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1 62#include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */ 63 64/* for second generation edgeports */ 65#define IMAGE_ARRAY_NAME BootCodeImage_GEN2 66#define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2 67#include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */ 68 69/* Then finally the main run-time operational code - for first generation edgeports */ 70#define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1 71#define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1 72#include "io_fw_down.h" /* Define array OperationalCodeImage[] */ 73 74/* for second generation edgeports */ 75#define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2 76#define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2 77#include "io_fw_down2.h" /* Define array OperationalCodeImage[] */ 78 79#define MAX_NAME_LEN 64 80 81#define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 82#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 83#define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 84 85/* receive port state */ 86enum RXSTATE { 87 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 88 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 89 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 90 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 91}; 92 93 94/* Transmit Fifo 95 * This Transmit queue is an extension of the edgeport Rx buffer. 96 * The maximum amount of data buffered in both the edgeport 97 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 98 */ 99struct TxFifo { 100 unsigned int head; /* index to head pointer (write) */ 101 unsigned int tail; /* index to tail pointer (read) */ 102 unsigned int count; /* Bytes in queue */ 103 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 104 unsigned char *fifo; /* allocated Buffer */ 105}; 106 107/* This structure holds all of the local port information */ 108struct edgeport_port { 109 __u16 txCredits; /* our current credits for this port */ 110 __u16 maxTxCredits; /* the max size of the port */ 111 112 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 113 struct urb *write_urb; /* write URB for this port */ 114 char write_in_progress; /* TRUE while a write URB is outstanding */ 115 spinlock_t ep_lock; 116 117 __u8 shadowLCR; /* last LCR value received */ 118 __u8 shadowMCR; /* last MCR value received */ 119 __u8 shadowMSR; /* last MSR value received */ 120 __u8 shadowLSR; /* last LSR value received */ 121 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 122 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 123 __u8 validDataMask; 124 __u32 baudRate; 125 126 char open; 127 char openPending; 128 char commandPending; 129 char closePending; 130 char chaseResponsePending; 131 132 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 133 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 134 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 135 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 136 137 struct async_icount icount; 138 struct usb_serial_port *port; /* loop back to the owner of this object */ 139}; 140 141 142/* This structure holds all of the individual device information */ 143struct edgeport_serial { 144 char name[MAX_NAME_LEN+2]; /* string name of this device */ 145 146 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 147 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 148 struct edgeport_product_info product_info; /* Product Info */ 149 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 150 int is_epic; /* flag if EPiC device or not */ 151 152 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 153 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 154 struct urb * interrupt_read_urb; /* our interrupt urb */ 155 156 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 157 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 158 struct urb * read_urb; /* our bulk read urb */ 159 int read_in_progress; 160 spinlock_t es_lock; 161 162 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 163 164 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 165 166 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 167 __u8 rxHeader1; /* receive header byte 1 */ 168 __u8 rxHeader2; /* receive header byte 2 */ 169 __u8 rxHeader3; /* receive header byte 3 */ 170 __u8 rxPort; /* the port that we are currently receiving data for */ 171 __u8 rxStatusCode; /* the receive status code */ 172 __u8 rxStatusParam; /* the receive status paramater */ 173 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 174 struct usb_serial *serial; /* loop back to the owner of this object */ 175}; 176 177/* baud rate information */ 178struct divisor_table_entry { 179 __u32 BaudRate; 180 __u16 Divisor; 181}; 182 183// 184// Define table of divisors for Rev A EdgePort/4 hardware 185// These assume a 3.6864MHz crystal, the standard /16, and 186// MCR.7 = 0. 187// 188static const struct divisor_table_entry divisor_table[] = { 189 { 50, 4608}, 190 { 75, 3072}, 191 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 192 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 193 { 150, 1536}, 194 { 300, 768}, 195 { 600, 384}, 196 { 1200, 192}, 197 { 1800, 128}, 198 { 2400, 96}, 199 { 4800, 48}, 200 { 7200, 32}, 201 { 9600, 24}, 202 { 14400, 16}, 203 { 19200, 12}, 204 { 38400, 6}, 205 { 57600, 4}, 206 { 115200, 2}, 207 { 230400, 1}, 208}; 209 210/* local variables */ 211static int debug; 212 213static int low_latency = 1; /* tty low latency flag, on by default */ 214 215static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */ 216 217 218/* local function prototypes */ 219 220/* function prototypes for all URB callbacks */ 221static void edge_interrupt_callback (struct urb *urb); 222static void edge_bulk_in_callback (struct urb *urb); 223static void edge_bulk_out_data_callback (struct urb *urb); 224static void edge_bulk_out_cmd_callback (struct urb *urb); 225 226/* function prototypes for the usbserial callbacks */ 227static int edge_open (struct usb_serial_port *port, struct file *filp); 228static void edge_close (struct usb_serial_port *port, struct file *filp); 229static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count); 230static int edge_write_room (struct usb_serial_port *port); 231static int edge_chars_in_buffer (struct usb_serial_port *port); 232static void edge_throttle (struct usb_serial_port *port); 233static void edge_unthrottle (struct usb_serial_port *port); 234static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios); 235static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 236static void edge_break (struct usb_serial_port *port, int break_state); 237static int edge_tiocmget (struct usb_serial_port *port, struct file *file); 238static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 239static int edge_startup (struct usb_serial *serial); 240static void edge_shutdown (struct usb_serial *serial); 241 242 243#include "io_tables.h" /* all of the devices that this driver supports */ 244 245static struct usb_driver io_driver = { 246 .name = "io_edgeport", 247 .probe = usb_serial_probe, 248 .disconnect = usb_serial_disconnect, 249 .id_table = id_table_combined, 250 .no_dynamic_id = 1, 251}; 252 253/* function prototypes for all of our local functions */ 254static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); 255static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); 256static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length); 257static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr); 258static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); 259static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param); 260static int calc_baud_rate_divisor (int baud_rate, int *divisor); 261static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate); 262static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios); 263static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue); 264static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength); 265static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port); 266 267static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 268static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 269static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 270static void get_manufacturing_desc (struct edgeport_serial *edge_serial); 271static void get_boot_desc (struct edgeport_serial *edge_serial); 272static void load_application_firmware (struct edgeport_serial *edge_serial); 273 274static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size); 275 276 277// ************************************************************************ 278// ************************************************************************ 279// ************************************************************************ 280// ************************************************************************ 281 282/************************************************************************ 283 * * 284 * update_edgeport_E2PROM() Compare current versions of * 285 * Boot ROM and Manufacture * 286 * Descriptors with versions * 287 * embedded in this driver * 288 * * 289 ************************************************************************/ 290static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) 291{ 292 __u32 BootCurVer; 293 __u32 BootNewVer; 294 __u8 BootMajorVersion; 295 __u8 BootMinorVersion; 296 __le16 BootBuildNumber; 297 __u8 *BootImage; 298 __u32 BootSize; 299 struct edge_firmware_image_record *record; 300 unsigned char *firmware; 301 int response; 302 303 304 switch (edge_serial->product_info.iDownloadFile) { 305 case EDGE_DOWNLOAD_FILE_I930: 306 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion; 307 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion; 308 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber); 309 BootImage = &BootCodeImage_GEN1[0]; 310 BootSize = sizeof( BootCodeImage_GEN1 ); 311 break; 312 313 case EDGE_DOWNLOAD_FILE_80251: 314 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion; 315 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion; 316 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber); 317 BootImage = &BootCodeImage_GEN2[0]; 318 BootSize = sizeof( BootCodeImage_GEN2 ); 319 break; 320 321 default: 322 return; 323 } 324 325 // Check Boot Image Version 326 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 327 (edge_serial->boot_descriptor.MinorVersion << 16) + 328 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 329 330 BootNewVer = (BootMajorVersion << 24) + 331 (BootMinorVersion << 16) + 332 le16_to_cpu(BootBuildNumber); 333 334 dbg("Current Boot Image version %d.%d.%d", 335 edge_serial->boot_descriptor.MajorVersion, 336 edge_serial->boot_descriptor.MinorVersion, 337 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 338 339 340 if (BootNewVer > BootCurVer) { 341 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 342 edge_serial->boot_descriptor.MajorVersion, 343 edge_serial->boot_descriptor.MinorVersion, 344 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 345 BootMajorVersion, 346 BootMinorVersion, 347 le16_to_cpu(BootBuildNumber)); 348 349 350 dbg("Downloading new Boot Image"); 351 352 firmware = BootImage; 353 354 for (;;) { 355 record = (struct edge_firmware_image_record *)firmware; 356 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 357 if (response < 0) { 358 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 359 break; 360 } 361 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 362 if (firmware >= &BootImage[BootSize]) { 363 break; 364 } 365 } 366 } else { 367 dbg("Boot Image -- already up to date"); 368 } 369} 370 371 372/************************************************************************ 373 * * 374 * Get string descriptor from device * 375 * * 376 ************************************************************************/ 377static int get_string (struct usb_device *dev, int Id, char *string, int buflen) 378{ 379 struct usb_string_descriptor StringDesc; 380 struct usb_string_descriptor *pStringDesc; 381 382 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 383 384 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 385 return 0; 386 } 387 388 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 389 390 if (!pStringDesc) { 391 return 0; 392 } 393 394 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 395 kfree(pStringDesc); 396 return 0; 397 } 398 399 unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2); 400 401 kfree(pStringDesc); 402 dbg("%s - USB String %s", __FUNCTION__, string); 403 return strlen(string); 404} 405 406 407#if 0 408/************************************************************************ 409 * 410 * Get string descriptor from device 411 * 412 ************************************************************************/ 413static int get_string_desc (struct usb_device *dev, int Id, 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", __FUNCTION__, Id ); 419 420 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 421 return 0; 422 } 423 424 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 425 426 if (!pStringDesc) { 427 return -1; 428 } 429 430 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 431 kfree(pStringDesc); 432 return -1; 433 } 434 435 *pRetDesc = pStringDesc; 436 return 0; 437} 438#endif 439 440static void dump_product_info(struct edgeport_product_info *product_info) 441{ 442 // Dump Product Info structure 443 dbg("**Product Information:"); 444 dbg(" ProductId %x", product_info->ProductId ); 445 dbg(" NumPorts %d", product_info->NumPorts ); 446 dbg(" ProdInfoVer %d", product_info->ProdInfoVer ); 447 dbg(" IsServer %d", product_info->IsServer); 448 dbg(" IsRS232 %d", product_info->IsRS232 ); 449 dbg(" IsRS422 %d", product_info->IsRS422 ); 450 dbg(" IsRS485 %d", product_info->IsRS485 ); 451 dbg(" RomSize %d", product_info->RomSize ); 452 dbg(" RamSize %d", product_info->RamSize ); 453 dbg(" CpuRev %x", product_info->CpuRev ); 454 dbg(" BoardRev %x", product_info->BoardRev); 455 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 456 product_info->BootMinorVersion, 457 le16_to_cpu(product_info->BootBuildNumber)); 458 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion, 459 product_info->FirmwareMinorVersion, 460 le16_to_cpu(product_info->FirmwareBuildNumber)); 461 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0], 462 product_info->ManufactureDescDate[1], 463 product_info->ManufactureDescDate[2]+1900); 464 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 465 dbg(" EpicVer %d", product_info->EpicVer); 466} 467 468static void get_product_info(struct edgeport_serial *edge_serial) 469{ 470 struct edgeport_product_info *product_info = &edge_serial->product_info; 471 472 memset (product_info, 0, sizeof(struct edgeport_product_info)); 473 474 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 475 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 476 product_info->ProdInfoVer = 0; 477 478 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 479 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 480 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 481 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 482 483 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion; 484 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion; 485 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber; 486 487 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate)); 488 489 // check if this is 2nd generation hardware 490 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) { 491 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion; 492 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion; 493 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber); 494 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 495 } else { 496 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion; 497 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion; 498 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber); 499 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 500 } 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", __FUNCTION__, 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 = (struct edgeport_serial *)urb->context; 601 struct edgeport_port *edge_port; 602 struct usb_serial_port *port; 603 unsigned char *data = urb->transfer_buffer; 604 int length = urb->actual_length; 605 int bytes_avail; 606 int position; 607 int txCredits; 608 int portNumber; 609 int result; 610 611 dbg("%s", __FUNCTION__); 612 613 switch (urb->status) { 614 case 0: 615 /* success */ 616 break; 617 case -ECONNRESET: 618 case -ENOENT: 619 case -ESHUTDOWN: 620 /* this urb is terminated, clean up */ 621 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 622 return; 623 default: 624 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 625 goto exit; 626 } 627 628 // process this interrupt-read even if there are no ports open 629 if (length) { 630 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data); 631 632 if (length > 1) { 633 bytes_avail = data[0] | (data[1] << 8); 634 if (bytes_avail) { 635 spin_lock(&edge_serial->es_lock); 636 edge_serial->rxBytesAvail += bytes_avail; 637 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 638 639 if (edge_serial->rxBytesAvail > 0 && 640 !edge_serial->read_in_progress) { 641 dbg("%s - posting a read", __FUNCTION__); 642 edge_serial->read_in_progress = TRUE; 643 644 /* we have pending bytes on the bulk in pipe, send a request */ 645 edge_serial->read_urb->dev = edge_serial->serial->dev; 646 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 647 if (result) { 648 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result); 649 edge_serial->read_in_progress = FALSE; 650 } 651 } 652 spin_unlock(&edge_serial->es_lock); 653 } 654 } 655 /* grab the txcredits for the ports if available */ 656 position = 2; 657 portNumber = 0; 658 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { 659 txCredits = data[position] | (data[position+1] << 8); 660 if (txCredits) { 661 port = edge_serial->serial->port[portNumber]; 662 edge_port = usb_get_serial_port_data(port); 663 if (edge_port->open) { 664 spin_lock(&edge_port->ep_lock); 665 edge_port->txCredits += txCredits; 666 spin_unlock(&edge_port->ep_lock); 667 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); 668 669 /* tell the tty driver that something has changed */ 670 if (edge_port->port->tty) 671 tty_wakeup(edge_port->port->tty); 672 673 // Since we have more credit, check if more data can be sent 674 send_more_port_data(edge_serial, edge_port); 675 } 676 } 677 position += 2; 678 ++portNumber; 679 } 680 } 681 682exit: 683 result = usb_submit_urb (urb, GFP_ATOMIC); 684 if (result) { 685 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result); 686 } 687} 688 689 690/***************************************************************************** 691 * edge_bulk_in_callback 692 * this is the callback function for when we have received data on the 693 * bulk in endpoint. 694 *****************************************************************************/ 695static void edge_bulk_in_callback (struct urb *urb) 696{ 697 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 698 unsigned char *data = urb->transfer_buffer; 699 int status; 700 __u16 raw_data_length; 701 702 dbg("%s", __FUNCTION__); 703 704 if (urb->status) { 705 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 706 edge_serial->read_in_progress = FALSE; 707 return; 708 } 709 710 if (urb->actual_length == 0) { 711 dbg("%s - read bulk callback with no data", __FUNCTION__); 712 edge_serial->read_in_progress = FALSE; 713 return; 714 } 715 716 raw_data_length = urb->actual_length; 717 718 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data); 719 720 spin_lock(&edge_serial->es_lock); 721 722 /* decrement our rxBytes available by the number that we just got */ 723 edge_serial->rxBytesAvail -= raw_data_length; 724 725 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); 726 727 process_rcvd_data (edge_serial, data, urb->actual_length); 728 729 /* check to see if there's any more data for us to read */ 730 if (edge_serial->rxBytesAvail > 0) { 731 dbg("%s - posting a read", __FUNCTION__); 732 edge_serial->read_urb->dev = edge_serial->serial->dev; 733 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 734 if (status) { 735 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status); 736 edge_serial->read_in_progress = FALSE; 737 } 738 } else { 739 edge_serial->read_in_progress = FALSE; 740 } 741 742 spin_unlock(&edge_serial->es_lock); 743} 744 745 746/***************************************************************************** 747 * edge_bulk_out_data_callback 748 * this is the callback function for when we have finished sending serial data 749 * on the bulk out endpoint. 750 *****************************************************************************/ 751static void edge_bulk_out_data_callback (struct urb *urb) 752{ 753 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 754 struct tty_struct *tty; 755 756 dbg("%s", __FUNCTION__); 757 758 if (urb->status) { 759 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 760 } 761 762 tty = edge_port->port->tty; 763 764 if (tty && edge_port->open) { 765 /* let the tty driver wakeup if it has a special write_wakeup function */ 766 tty_wakeup(tty); 767 } 768 769 // Release the Write URB 770 edge_port->write_in_progress = FALSE; 771 772 // Check if more data needs to be sent 773 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port); 774} 775 776 777/***************************************************************************** 778 * BulkOutCmdCallback 779 * this is the callback function for when we have finished sending a command 780 * on the bulk out endpoint. 781 *****************************************************************************/ 782static void edge_bulk_out_cmd_callback (struct urb *urb) 783{ 784 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 785 struct tty_struct *tty; 786 int status = urb->status; 787 788 dbg("%s", __FUNCTION__); 789 790 CmdUrbs--; 791 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 792 793 794 /* clean up the transfer buffer */ 795 kfree(urb->transfer_buffer); 796 797 /* Free the command urb */ 798 usb_free_urb (urb); 799 800 if (status) { 801 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); 802 return; 803 } 804 805 /* Get pointer to tty */ 806 tty = edge_port->port->tty; 807 808 /* tell the tty driver that something has changed */ 809 if (tty && edge_port->open) 810 tty_wakeup(tty); 811 812 /* we have completed the command */ 813 edge_port->commandPending = FALSE; 814 wake_up(&edge_port->wait_command); 815} 816 817 818/***************************************************************************** 819 * Driver tty interface functions 820 *****************************************************************************/ 821 822/***************************************************************************** 823 * SerialOpen 824 * this function is called by the tty driver when a port is opened 825 * If successful, we return 0 826 * Otherwise we return a negative error number. 827 *****************************************************************************/ 828static int edge_open (struct usb_serial_port *port, struct file * filp) 829{ 830 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 831 struct usb_serial *serial; 832 struct edgeport_serial *edge_serial; 833 int response; 834 835 dbg("%s - port %d", __FUNCTION__, port->number); 836 837 if (edge_port == NULL) 838 return -ENODEV; 839 840 if (port->tty) 841 port->tty->low_latency = low_latency; 842 843 /* see if we've set up our endpoint info yet (can't set it up in edge_startup 844 as the structures were not set up at that time.) */ 845 serial = port->serial; 846 edge_serial = usb_get_serial_data(serial); 847 if (edge_serial == NULL) { 848 return -ENODEV; 849 } 850 if (edge_serial->interrupt_in_buffer == NULL) { 851 struct usb_serial_port *port0 = serial->port[0]; 852 853 /* not set up yet, so do it now */ 854 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; 855 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; 856 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 857 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 858 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; 859 edge_serial->read_urb = port0->read_urb; 860 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; 861 862 /* set up our interrupt urb */ 863 usb_fill_int_urb(edge_serial->interrupt_read_urb, 864 serial->dev, 865 usb_rcvintpipe(serial->dev, 866 port0->interrupt_in_endpointAddress), 867 port0->interrupt_in_buffer, 868 edge_serial->interrupt_read_urb->transfer_buffer_length, 869 edge_interrupt_callback, edge_serial, 870 edge_serial->interrupt_read_urb->interval); 871 872 /* set up our bulk in urb */ 873 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 874 usb_rcvbulkpipe(serial->dev, 875 port0->bulk_in_endpointAddress), 876 port0->bulk_in_buffer, 877 edge_serial->read_urb->transfer_buffer_length, 878 edge_bulk_in_callback, edge_serial); 879 edge_serial->read_in_progress = FALSE; 880 881 /* start interrupt read for this edgeport 882 * this interrupt will continue as long as the edgeport is connected */ 883 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL); 884 if (response) { 885 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response); 886 } 887 } 888 889 /* initialize our wait queues */ 890 init_waitqueue_head(&edge_port->wait_open); 891 init_waitqueue_head(&edge_port->wait_chase); 892 init_waitqueue_head(&edge_port->delta_msr_wait); 893 init_waitqueue_head(&edge_port->wait_command); 894 895 /* initialize our icount structure */ 896 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 897 898 /* initialize our port settings */ 899 edge_port->txCredits = 0; /* Can't send any data yet */ 900 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ 901 edge_port->chaseResponsePending = FALSE; 902 903 /* send a open port command */ 904 edge_port->openPending = TRUE; 905 edge_port->open = FALSE; 906 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); 907 908 if (response < 0) { 909 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__); 910 edge_port->openPending = FALSE; 911 return -ENODEV; 912 } 913 914 /* now wait for the port to be completely opened */ 915 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT); 916 917 if (edge_port->open == FALSE) { 918 /* open timed out */ 919 dbg("%s - open timedout", __FUNCTION__); 920 edge_port->openPending = FALSE; 921 return -ENODEV; 922 } 923 924 /* create the txfifo */ 925 edge_port->txfifo.head = 0; 926 edge_port->txfifo.tail = 0; 927 edge_port->txfifo.count = 0; 928 edge_port->txfifo.size = edge_port->maxTxCredits; 929 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL); 930 931 if (!edge_port->txfifo.fifo) { 932 dbg("%s - no memory", __FUNCTION__); 933 edge_close (port, filp); 934 return -ENOMEM; 935 } 936 937 /* Allocate a URB for the write */ 938 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL); 939 edge_port->write_in_progress = FALSE; 940 941 if (!edge_port->write_urb) { 942 dbg("%s - no memory", __FUNCTION__); 943 edge_close (port, filp); 944 return -ENOMEM; 945 } 946 947 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); 948 949 dbg("%s exited", __FUNCTION__); 950 951 return 0; 952} 953 954 955/************************************************************************ 956 * 957 * block_until_chase_response 958 * 959 * This function will block the close until one of the following: 960 * 1. Response to our Chase comes from Edgeport 961 * 2. A timout of 10 seconds without activity has expired 962 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 963 * 964 ************************************************************************/ 965static void block_until_chase_response(struct edgeport_port *edge_port) 966{ 967 DEFINE_WAIT(wait); 968 __u16 lastCredits; 969 int timeout = 1*HZ; 970 int loop = 10; 971 972 while (1) { 973 // Save Last credits 974 lastCredits = edge_port->txCredits; 975 976 // Did we get our Chase response 977 if (edge_port->chaseResponsePending == FALSE) { 978 dbg("%s - Got Chase Response", __FUNCTION__); 979 980 // did we get all of our credit back? 981 if (edge_port->txCredits == edge_port->maxTxCredits ) { 982 dbg("%s - Got all credits", __FUNCTION__); 983 return; 984 } 985 } 986 987 // Block the thread for a while 988 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 989 schedule_timeout(timeout); 990 finish_wait(&edge_port->wait_chase, &wait); 991 992 if (lastCredits == edge_port->txCredits) { 993 // No activity.. count down. 994 loop--; 995 if (loop == 0) { 996 edge_port->chaseResponsePending = FALSE; 997 dbg("%s - Chase TIMEOUT", __FUNCTION__); 998 return; 999 } 1000 } else { 1001 // Reset timout value back to 10 seconds 1002 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); 1003 loop = 10; 1004 } 1005 } 1006} 1007 1008 1009/************************************************************************ 1010 * 1011 * block_until_tx_empty 1012 * 1013 * This function will block the close until one of the following: 1014 * 1. TX count are 0 1015 * 2. The edgeport has stopped 1016 * 3. A timout of 3 seconds without activity has expired 1017 * 1018 ************************************************************************/ 1019static void block_until_tx_empty (struct edgeport_port *edge_port) 1020{ 1021 DEFINE_WAIT(wait); 1022 struct TxFifo *fifo = &edge_port->txfifo; 1023 __u32 lastCount; 1024 int timeout = HZ/10; 1025 int loop = 30; 1026 1027 while (1) { 1028 // Save Last count 1029 lastCount = fifo->count; 1030 1031 // Is the Edgeport Buffer empty? 1032 if (lastCount == 0) { 1033 dbg("%s - TX Buffer Empty", __FUNCTION__); 1034 return; 1035 } 1036 1037 // Block the thread for a while 1038 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 1039 schedule_timeout(timeout); 1040 finish_wait(&edge_port->wait_chase, &wait); 1041 1042 dbg("%s wait", __FUNCTION__); 1043 1044 if (lastCount == fifo->count) { 1045 // No activity.. count down. 1046 loop--; 1047 if (loop == 0) { 1048 dbg("%s - TIMEOUT", __FUNCTION__); 1049 return; 1050 } 1051 } else { 1052 // Reset timout value back to seconds 1053 loop = 30; 1054 } 1055 } 1056} 1057 1058 1059/***************************************************************************** 1060 * edge_close 1061 * this function is called by the tty driver when a port is closed 1062 *****************************************************************************/ 1063static void edge_close (struct usb_serial_port *port, struct file * filp) 1064{ 1065 struct edgeport_serial *edge_serial; 1066 struct edgeport_port *edge_port; 1067 int status; 1068 1069 dbg("%s - port %d", __FUNCTION__, port->number); 1070 1071 edge_serial = usb_get_serial_data(port->serial); 1072 edge_port = usb_get_serial_port_data(port); 1073 if ((edge_serial == NULL) || (edge_port == NULL)) 1074 return; 1075 1076 // block until tx is empty 1077 block_until_tx_empty(edge_port); 1078 1079 edge_port->closePending = TRUE; 1080 1081 if ((!edge_serial->is_epic) || 1082 ((edge_serial->is_epic) && 1083 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1084 /* flush and chase */ 1085 edge_port->chaseResponsePending = TRUE; 1086 1087 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1088 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1089 if (status == 0) { 1090 // block until chase finished 1091 block_until_chase_response(edge_port); 1092 } else { 1093 edge_port->chaseResponsePending = FALSE; 1094 } 1095 } 1096 1097 if ((!edge_serial->is_epic) || 1098 ((edge_serial->is_epic) && 1099 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1100 /* close the port */ 1101 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); 1102 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); 1103 } 1104 1105 //port->close = TRUE; 1106 edge_port->closePending = FALSE; 1107 edge_port->open = FALSE; 1108 edge_port->openPending = FALSE; 1109 1110 usb_kill_urb(edge_port->write_urb); 1111 1112 if (edge_port->write_urb) { 1113 /* if this urb had a transfer buffer already (old transfer) free it */ 1114 kfree(edge_port->write_urb->transfer_buffer); 1115 usb_free_urb(edge_port->write_urb); 1116 edge_port->write_urb = NULL; 1117 } 1118 kfree(edge_port->txfifo.fifo); 1119 edge_port->txfifo.fifo = NULL; 1120 1121 dbg("%s exited", __FUNCTION__); 1122} 1123 1124/***************************************************************************** 1125 * SerialWrite 1126 * this function is called by the tty driver when data should be written to 1127 * the port. 1128 * If successful, we return the number of bytes written, otherwise we return 1129 * a negative error number. 1130 *****************************************************************************/ 1131static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count) 1132{ 1133 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1134 struct TxFifo *fifo; 1135 int copySize; 1136 int bytesleft; 1137 int firsthalf; 1138 int secondhalf; 1139 unsigned long flags; 1140 1141 dbg("%s - port %d", __FUNCTION__, port->number); 1142 1143 if (edge_port == NULL) 1144 return -ENODEV; 1145 1146 // get a pointer to the Tx fifo 1147 fifo = &edge_port->txfifo; 1148 1149 spin_lock_irqsave(&edge_port->ep_lock, flags); 1150 1151 // calculate number of bytes to put in fifo 1152 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); 1153 1154 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, 1155 port->number, count, edge_port->txCredits - fifo->count, copySize); 1156 1157 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ 1158 if (copySize == 0) { 1159 dbg("%s - copySize = Zero", __FUNCTION__); 1160 goto finish_write; 1161 } 1162 1163 // queue the data 1164 // since we can never overflow the buffer we do not have to check for full condition 1165 1166 // the copy is done is two parts -- first fill to the end of the buffer 1167 // then copy the reset from the start of the buffer 1168 1169 bytesleft = fifo->size - fifo->head; 1170 firsthalf = min (bytesleft, copySize); 1171 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); 1172 1173 /* now copy our data */ 1174 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1175 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]); 1176 1177 // update the index and size 1178 fifo->head += firsthalf; 1179 fifo->count += firsthalf; 1180 1181 // wrap the index 1182 if (fifo->head == fifo->size) { 1183 fifo->head = 0; 1184 } 1185 1186 secondhalf = copySize-firsthalf; 1187 1188 if (secondhalf) { 1189 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); 1190 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1191 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]); 1192 // update the index and size 1193 fifo->count += secondhalf; 1194 fifo->head += secondhalf; 1195 // No need to check for wrap since we can not get to end of fifo in this part 1196 } 1197 1198finish_write: 1199 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1200 1201 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port); 1202 1203 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); 1204 1205 return copySize; 1206} 1207 1208 1209/************************************************************************ 1210 * 1211 * send_more_port_data() 1212 * 1213 * This routine attempts to write additional UART transmit data 1214 * to a port over the USB bulk pipe. It is called (1) when new 1215 * data has been written to a port's TxBuffer from higher layers 1216 * (2) when the peripheral sends us additional TxCredits indicating 1217 * that it can accept more Tx data for a given port; and (3) when 1218 * a bulk write completes successfully and we want to see if we 1219 * can transmit more. 1220 * 1221 ************************************************************************/ 1222static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) 1223{ 1224 struct TxFifo *fifo = &edge_port->txfifo; 1225 struct urb *urb; 1226 unsigned char *buffer; 1227 int status; 1228 int count; 1229 int bytesleft; 1230 int firsthalf; 1231 int secondhalf; 1232 unsigned long flags; 1233 1234 dbg("%s(%d)", __FUNCTION__, edge_port->port->number); 1235 1236 spin_lock_irqsave(&edge_port->ep_lock, flags); 1237 1238 if (edge_port->write_in_progress || 1239 !edge_port->open || 1240 (fifo->count == 0)) { 1241 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); 1242 goto exit_send; 1243 } 1244 1245 // since the amount of data in the fifo will always fit into the 1246 // edgeport buffer we do not need to check the write length 1247 1248 // Do we have enough credits for this port to make it worthwhile 1249 // to bother queueing a write. If it's too small, say a few bytes, 1250 // it's better to wait for more credits so we can do a larger 1251 // write. 1252 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1253 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); 1254 goto exit_send; 1255 } 1256 1257 // lock this write 1258 edge_port->write_in_progress = TRUE; 1259 1260 // get a pointer to the write_urb 1261 urb = edge_port->write_urb; 1262 1263 /* make sure transfer buffer is freed */ 1264 kfree(urb->transfer_buffer); 1265 urb->transfer_buffer = NULL; 1266 1267 /* build the data header for the buffer and port that we are about to send out */ 1268 count = fifo->count; 1269 buffer = kmalloc (count+2, GFP_ATOMIC); 1270 if (buffer == NULL) { 1271 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__); 1272 edge_port->write_in_progress = FALSE; 1273 goto exit_send; 1274 } 1275 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); 1276 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); 1277 1278 /* now copy our data */ 1279 bytesleft = fifo->size - fifo->tail; 1280 firsthalf = min (bytesleft, count); 1281 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1282 fifo->tail += firsthalf; 1283 fifo->count -= firsthalf; 1284 if (fifo->tail == fifo->size) { 1285 fifo->tail = 0; 1286 } 1287 1288 secondhalf = count-firsthalf; 1289 if (secondhalf) { 1290 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); 1291 fifo->tail += secondhalf; 1292 fifo->count -= secondhalf; 1293 } 1294 1295 if (count) 1296 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]); 1297 1298 /* fill up the urb with all of our data and submit it */ 1299 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 1300 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 1301 buffer, count+2, edge_bulk_out_data_callback, edge_port); 1302 1303 /* decrement the number of credits we have by the number we just sent */ 1304 edge_port->txCredits -= count; 1305 edge_port->icount.tx += count; 1306 1307 urb->dev = edge_serial->serial->dev; 1308 status = usb_submit_urb(urb, GFP_ATOMIC); 1309 if (status) { 1310 /* something went wrong */ 1311 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status); 1312 edge_port->write_in_progress = FALSE; 1313 1314 /* revert the credits as something bad happened. */ 1315 edge_port->txCredits += count; 1316 edge_port->icount.tx -= count; 1317 } 1318 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); 1319 1320exit_send: 1321 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1322} 1323 1324 1325/***************************************************************************** 1326 * edge_write_room 1327 * this function is called by the tty driver when it wants to know how many 1328 * bytes of data we can accept for a specific port. 1329 * If successful, we return the amount of room that we have for this port 1330 * (the txCredits), 1331 * Otherwise we return a negative error number. 1332 *****************************************************************************/ 1333static int edge_write_room (struct usb_serial_port *port) 1334{ 1335 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1336 int room; 1337 unsigned long flags; 1338 1339 dbg("%s", __FUNCTION__); 1340 1341 if (edge_port == NULL) 1342 return -ENODEV; 1343 if (edge_port->closePending == TRUE) 1344 return -ENODEV; 1345 1346 dbg("%s - port %d", __FUNCTION__, port->number); 1347 1348 if (!edge_port->open) { 1349 dbg("%s - port not opened", __FUNCTION__); 1350 return -EINVAL; 1351 } 1352 1353 // total of both buffers is still txCredit 1354 spin_lock_irqsave(&edge_port->ep_lock, flags); 1355 room = edge_port->txCredits - edge_port->txfifo.count; 1356 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1357 1358 dbg("%s - returns %d", __FUNCTION__, room); 1359 return room; 1360} 1361 1362 1363/***************************************************************************** 1364 * edge_chars_in_buffer 1365 * this function is called by the tty driver when it wants to know how many 1366 * bytes of data we currently have outstanding in the port (data that has 1367 * been written, but hasn't made it out the port yet) 1368 * If successful, we return the number of bytes left to be written in the 1369 * system, 1370 * Otherwise we return a negative error number. 1371 *****************************************************************************/ 1372static int edge_chars_in_buffer (struct usb_serial_port *port) 1373{ 1374 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1375 int num_chars; 1376 unsigned long flags; 1377 1378 dbg("%s", __FUNCTION__); 1379 1380 if (edge_port == NULL) 1381 return -ENODEV; 1382 if (edge_port->closePending == TRUE) 1383 return -ENODEV; 1384 1385 if (!edge_port->open) { 1386 dbg("%s - port not opened", __FUNCTION__); 1387 return -EINVAL; 1388 } 1389 1390 spin_lock_irqsave(&edge_port->ep_lock, flags); 1391 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; 1392 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1393 if (num_chars) { 1394 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); 1395 } 1396 1397 return num_chars; 1398} 1399 1400 1401/***************************************************************************** 1402 * SerialThrottle 1403 * this function is called by the tty driver when it wants to stop the data 1404 * being read from the port. 1405 *****************************************************************************/ 1406static void edge_throttle (struct usb_serial_port *port) 1407{ 1408 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1409 struct tty_struct *tty; 1410 int status; 1411 1412 dbg("%s - port %d", __FUNCTION__, port->number); 1413 1414 if (edge_port == NULL) 1415 return; 1416 1417 if (!edge_port->open) { 1418 dbg("%s - port not opened", __FUNCTION__); 1419 return; 1420 } 1421 1422 tty = port->tty; 1423 if (!tty) { 1424 dbg ("%s - no tty available", __FUNCTION__); 1425 return; 1426 } 1427 1428 /* if we are implementing XON/XOFF, send the stop character */ 1429 if (I_IXOFF(tty)) { 1430 unsigned char stop_char = STOP_CHAR(tty); 1431 status = edge_write (port, &stop_char, 1); 1432 if (status <= 0) { 1433 return; 1434 } 1435 } 1436 1437 /* if we are implementing RTS/CTS, toggle that line */ 1438 if (tty->termios->c_cflag & CRTSCTS) { 1439 edge_port->shadowMCR &= ~MCR_RTS; 1440 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1441 if (status != 0) { 1442 return; 1443 } 1444 } 1445 1446 return; 1447} 1448 1449 1450/***************************************************************************** 1451 * edge_unthrottle 1452 * this function is called by the tty driver when it wants to resume the data 1453 * being read from the port (called after SerialThrottle is called) 1454 *****************************************************************************/ 1455static void edge_unthrottle (struct usb_serial_port *port) 1456{ 1457 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1458 struct tty_struct *tty; 1459 int status; 1460 1461 dbg("%s - port %d", __FUNCTION__, port->number); 1462 1463 if (edge_port == NULL) 1464 return; 1465 1466 if (!edge_port->open) { 1467 dbg("%s - port not opened", __FUNCTION__); 1468 return; 1469 } 1470 1471 tty = port->tty; 1472 if (!tty) { 1473 dbg ("%s - no tty available", __FUNCTION__); 1474 return; 1475 } 1476 1477 /* if we are implementing XON/XOFF, send the start character */ 1478 if (I_IXOFF(tty)) { 1479 unsigned char start_char = START_CHAR(tty); 1480 status = edge_write (port, &start_char, 1); 1481 if (status <= 0) { 1482 return; 1483 } 1484 } 1485 1486 /* if we are implementing RTS/CTS, toggle that line */ 1487 if (tty->termios->c_cflag & CRTSCTS) { 1488 edge_port->shadowMCR |= MCR_RTS; 1489 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1490 if (status != 0) { 1491 return; 1492 } 1493 } 1494 1495 return; 1496} 1497 1498 1499/***************************************************************************** 1500 * SerialSetTermios 1501 * this function is called by the tty driver when it wants to change the termios structure 1502 *****************************************************************************/ 1503static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 1504{ 1505 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1506 struct tty_struct *tty = port->tty; 1507 unsigned int cflag; 1508 1509 if (!port->tty || !port->tty->termios) { 1510 dbg ("%s - no tty or termios", __FUNCTION__); 1511 return; 1512 } 1513 1514 cflag = tty->termios->c_cflag; 1515 /* check that they really want us to change something */ 1516 if (old_termios) { 1517 if (cflag == old_termios->c_cflag && 1518 tty->termios->c_iflag == old_termios->c_iflag) { 1519 dbg("%s - nothing to change", __FUNCTION__); 1520 return; 1521 } 1522 } 1523 1524 dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 1525 tty->termios->c_cflag, tty->termios->c_iflag); 1526 if (old_termios) { 1527 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, 1528 old_termios->c_cflag, old_termios->c_iflag); 1529 } 1530 1531 dbg("%s - port %d", __FUNCTION__, port->number); 1532 1533 if (edge_port == NULL) 1534 return; 1535 1536 if (!edge_port->open) { 1537 dbg("%s - port not opened", __FUNCTION__); 1538 return; 1539 } 1540 1541 /* change the port settings to the new ones specified */ 1542 change_port_settings (edge_port, old_termios); 1543 1544 return; 1545} 1546 1547 1548/***************************************************************************** 1549 * get_lsr_info - get line status register info 1550 * 1551 * Purpose: Let user call ioctl() to get info when the UART physically 1552 * is emptied. On bus types like RS485, the transmitter must 1553 * release the bus after transmitting. This must be done when 1554 * the transmit shift register is empty, not be done when the 1555 * transmit holding register is empty. This functionality 1556 * allows an RS485 driver to be written in user space. 1557 *****************************************************************************/ 1558static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value) 1559{ 1560 unsigned int result = 0; 1561 unsigned long flags; 1562 1563 spin_lock_irqsave(&edge_port->ep_lock, flags); 1564 if (edge_port->maxTxCredits == edge_port->txCredits && 1565 edge_port->txfifo.count == 0) { 1566 dbg("%s -- Empty", __FUNCTION__); 1567 result = TIOCSER_TEMT; 1568 } 1569 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1570 1571 if (copy_to_user(value, &result, sizeof(int))) 1572 return -EFAULT; 1573 return 0; 1574} 1575 1576static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value) 1577{ 1578 unsigned int result = 0; 1579 struct tty_struct *tty = edge_port->port->tty; 1580 1581 if (!tty) 1582 return -ENOIOCTLCMD; 1583 1584 result = tty->read_cnt; 1585 1586 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result); 1587 if (copy_to_user(value, &result, sizeof(int))) 1588 return -EFAULT; 1589 //return 0; 1590 return -ENOIOCTLCMD; 1591} 1592 1593static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) 1594{ 1595 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1596 unsigned int mcr; 1597 1598 dbg("%s - port %d", __FUNCTION__, port->number); 1599 1600 mcr = edge_port->shadowMCR; 1601 if (set & TIOCM_RTS) 1602 mcr |= MCR_RTS; 1603 if (set & TIOCM_DTR) 1604 mcr |= MCR_DTR; 1605 if (set & TIOCM_LOOP) 1606 mcr |= MCR_LOOPBACK; 1607 1608 if (clear & TIOCM_RTS) 1609 mcr &= ~MCR_RTS; 1610 if (clear & TIOCM_DTR) 1611 mcr &= ~MCR_DTR; 1612 if (clear & TIOCM_LOOP) 1613 mcr &= ~MCR_LOOPBACK; 1614 1615 edge_port->shadowMCR = mcr; 1616 1617 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1618 1619 return 0; 1620} 1621 1622static int edge_tiocmget(struct usb_serial_port *port, struct file *file) 1623{ 1624 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1625 unsigned int result = 0; 1626 unsigned int msr; 1627 unsigned int mcr; 1628 1629 dbg("%s - port %d", __FUNCTION__, port->number); 1630 1631 msr = edge_port->shadowMSR; 1632 mcr = edge_port->shadowMCR; 1633 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1634 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1635 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1636 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1637 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1638 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1639 1640 1641 dbg("%s -- %x", __FUNCTION__, result); 1642 1643 return result; 1644} 1645 1646static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo) 1647{ 1648 struct serial_struct tmp; 1649 1650 if (!retinfo) 1651 return -EFAULT; 1652 1653 memset(&tmp, 0, sizeof(tmp)); 1654 1655 tmp.type = PORT_16550A; 1656 tmp.line = edge_port->port->serial->minor; 1657 tmp.port = edge_port->port->number; 1658 tmp.irq = 0; 1659 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1660 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1661 tmp.baud_base = 9600; 1662 tmp.close_delay = 5*HZ; 1663 tmp.closing_wait = 30*HZ; 1664// tmp.custom_divisor = state->custom_divisor; 1665// tmp.hub6 = state->hub6; 1666// tmp.io_type = state->io_type; 1667 1668 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1669 return -EFAULT; 1670 return 0; 1671} 1672 1673 1674 1675/***************************************************************************** 1676 * SerialIoctl 1677 * this function handles any ioctl calls to the driver 1678 *****************************************************************************/ 1679static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 1680{ 1681 DEFINE_WAIT(wait); 1682 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1683 struct async_icount cnow; 1684 struct async_icount cprev; 1685 struct serial_icounter_struct icount; 1686 1687 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); 1688 1689 switch (cmd) { 1690 // return number of bytes available 1691 case TIOCINQ: 1692 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); 1693 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg); 1694 break; 1695 1696 case TIOCSERGETLSR: 1697 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); 1698 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1699 return 0; 1700 1701 case TIOCGSERIAL: 1702 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); 1703 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1704 1705 case TIOCSSERIAL: 1706 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); 1707 break; 1708 1709 case TIOCMIWAIT: 1710 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 1711 cprev = edge_port->icount; 1712 while (1) { 1713 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE); 1714 schedule(); 1715 finish_wait(&edge_port->delta_msr_wait, &wait); 1716 /* see if a signal did it */ 1717 if (signal_pending(current)) 1718 return -ERESTARTSYS; 1719 cnow = edge_port->icount; 1720 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1721 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1722 return -EIO; /* no change => error */ 1723 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1724 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1725 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1726 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 1727 return 0; 1728 } 1729 cprev = cnow; 1730 } 1731 /* NOTREACHED */ 1732 break; 1733 1734 case TIOCGICOUNT: 1735 cnow = edge_port->icount; 1736 memset(&icount, 0, sizeof(icount)); 1737 icount.cts = cnow.cts; 1738 icount.dsr = cnow.dsr; 1739 icount.rng = cnow.rng; 1740 icount.dcd = cnow.dcd; 1741 icount.rx = cnow.rx; 1742 icount.tx = cnow.tx; 1743 icount.frame = cnow.frame; 1744 icount.overrun = cnow.overrun; 1745 icount.parity = cnow.parity; 1746 icount.brk = cnow.brk; 1747 icount.buf_overrun = cnow.buf_overrun; 1748 1749 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx ); 1750 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1751 return -EFAULT; 1752 return 0; 1753 } 1754 1755 return -ENOIOCTLCMD; 1756} 1757 1758 1759/***************************************************************************** 1760 * SerialBreak 1761 * this function sends a break to the port 1762 *****************************************************************************/ 1763static void edge_break (struct usb_serial_port *port, int break_state) 1764{ 1765 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1766 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1767 int status; 1768 1769 if ((!edge_serial->is_epic) || 1770 ((edge_serial->is_epic) && 1771 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1772 /* flush and chase */ 1773 edge_port->chaseResponsePending = TRUE; 1774 1775 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1776 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1777 if (status == 0) { 1778 // block until chase finished 1779 block_until_chase_response(edge_port); 1780 } else { 1781 edge_port->chaseResponsePending = FALSE; 1782 } 1783 } 1784 1785 if ((!edge_serial->is_epic) || 1786 ((edge_serial->is_epic) && 1787 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1788 if (break_state == -1) { 1789 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__); 1790 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0); 1791 } else { 1792 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__); 1793 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0); 1794 } 1795 if (status) { 1796 dbg("%s - error sending break set/clear command.", __FUNCTION__); 1797 } 1798 } 1799 1800 return; 1801} 1802 1803 1804/***************************************************************************** 1805 * process_rcvd_data 1806 * this function handles the data received on the bulk in pipe. 1807 *****************************************************************************/ 1808static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength) 1809{ 1810 struct usb_serial_port *port; 1811 struct edgeport_port *edge_port; 1812 struct tty_struct *tty; 1813 __u16 lastBufferLength; 1814 __u16 rxLen; 1815 1816 dbg("%s", __FUNCTION__); 1817 1818 lastBufferLength = bufferLength + 1; 1819 1820 while (bufferLength > 0) { 1821 /* failsafe incase we get a message that we don't understand */ 1822 if (lastBufferLength == bufferLength) { 1823 dbg("%s - stuck in loop, exiting it.", __FUNCTION__); 1824 break; 1825 } 1826 lastBufferLength = bufferLength; 1827 1828 switch (edge_serial->rxState) { 1829 case EXPECT_HDR1: 1830 edge_serial->rxHeader1 = *buffer; 1831 ++buffer; 1832 --bufferLength; 1833 1834 if (bufferLength == 0) { 1835 edge_serial->rxState = EXPECT_HDR2; 1836 break; 1837 } 1838 /* otherwise, drop on through */ 1839 1840 case EXPECT_HDR2: 1841 edge_serial->rxHeader2 = *buffer; 1842 ++buffer; 1843 --bufferLength; 1844 1845 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2); 1846 1847 // Process depending on whether this header is 1848 // data or status 1849 1850 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1851 // Decode this status header and goto EXPECT_HDR1 (if we 1852 // can process the status with only 2 bytes), or goto 1853 // EXPECT_HDR3 to get the third byte. 1854 1855 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1856 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1); 1857 1858 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) { 1859 // This status needs additional bytes. Save what we have 1860 // and then wait for more data. 1861 edge_serial->rxStatusParam = edge_serial->rxHeader2; 1862 1863 edge_serial->rxState = EXPECT_HDR3; 1864 break; 1865 } 1866 1867 // We have all the header bytes, process the status now 1868 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0); 1869 edge_serial->rxState = EXPECT_HDR1; 1870 break; 1871 } else { 1872 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1873 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2); 1874 1875 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining); 1876 1877 //ASSERT( DevExt->RxPort < DevExt->NumPorts ); 1878 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH ); 1879 1880 if (bufferLength == 0 ) { 1881 edge_serial->rxState = EXPECT_DATA; 1882 break; 1883 } 1884 // Else, drop through 1885 } 1886 1887 case EXPECT_DATA: // Expect data 1888 1889 if (bufferLength < edge_serial->rxBytesRemaining) { 1890 rxLen = bufferLength; 1891 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer 1892 } else { 1893 // BufLen >= RxBytesRemaining 1894 rxLen = edge_serial->rxBytesRemaining; 1895 edge_serial->rxState = EXPECT_HDR1; // Start another header next time 1896 } 1897 1898 bufferLength -= rxLen; 1899 edge_serial->rxBytesRemaining -= rxLen; 1900 1901 /* spit this data back into the tty driver if this port is open */ 1902 if (rxLen) { 1903 port = edge_serial->serial->port[edge_serial->rxPort]; 1904 edge_port = usb_get_serial_port_data(port); 1905 if (edge_port->open) { 1906 tty = edge_port->port->tty; 1907 if (tty) { 1908 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort); 1909 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1910 } 1911 edge_port->icount.rx += rxLen; 1912 } 1913 buffer += rxLen; 1914 } 1915 1916 break; 1917 1918 case EXPECT_HDR3: // Expect 3rd byte of status header 1919 edge_serial->rxHeader3 = *buffer; 1920 ++buffer; 1921 --bufferLength; 1922 1923 // We have all the header bytes, process the status now 1924 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3); 1925 edge_serial->rxState = EXPECT_HDR1; 1926 break; 1927 1928 } 1929 } 1930} 1931 1932 1933/***************************************************************************** 1934 * process_rcvd_status 1935 * this function handles the any status messages received on the bulk in pipe. 1936 *****************************************************************************/ 1937static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3) 1938{ 1939 struct usb_serial_port *port; 1940 struct edgeport_port *edge_port; 1941 __u8 code = edge_serial->rxStatusCode; 1942 1943 /* switch the port pointer to the one being currently talked about */ 1944 port = edge_serial->serial->port[edge_serial->rxPort]; 1945 edge_port = usb_get_serial_port_data(port); 1946 if (edge_port == NULL) { 1947 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort); 1948 return; 1949 } 1950 1951 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort); 1952 1953 if (code == IOSP_EXT_STATUS) { 1954 switch (byte2) { 1955 case IOSP_EXT_STATUS_CHASE_RSP: 1956 // we want to do EXT status regardless of port open/closed 1957 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 ); 1958 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call 1959 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do. 1960 // Also, we currently clear flag and close the port regardless of content of above's Byte3. 1961 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport, 1962 // like wait longer in block_until_chase_response, but for now we don't. 1963 edge_port->chaseResponsePending = FALSE; 1964 wake_up (&edge_port->wait_chase); 1965 return; 1966 1967 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1968 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 ); 1969 //Port->RxCheckRsp = TRUE; 1970 return; 1971 } 1972 } 1973 1974 if (code == IOSP_STATUS_OPEN_RSP) { 1975 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1976 edge_port->maxTxCredits = edge_port->txCredits; 1977 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits); 1978 handle_new_msr (edge_port, byte2); 1979 1980 /* send the current line settings to the port so we are in sync with any further termios calls */ 1981 if (edge_port->port->tty) 1982 change_port_settings (edge_port, edge_port->port->tty->termios); 1983 1984 /* we have completed the open */ 1985 edge_port->openPending = FALSE; 1986 edge_port->open = TRUE; 1987 wake_up(&edge_port->wait_open); 1988 return; 1989 } 1990 1991 // If port is closed, silently discard all rcvd status. We can 1992 // have cases where buffered status is received AFTER the close 1993 // port command is sent to the Edgeport. 1994 if ((!edge_port->open ) || (edge_port->closePending)) { 1995 return; 1996 } 1997 1998 switch (code) { 1999 // Not currently sent by Edgeport 2000 case IOSP_STATUS_LSR: 2001 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2002 handle_new_lsr (edge_port, FALSE, byte2, 0); 2003 break; 2004 2005 case IOSP_STATUS_LSR_DATA: 2006 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2007 // byte2 is LSR Register 2008 // byte3 is broken data byte 2009 handle_new_lsr (edge_port, TRUE, byte2, byte3); 2010 break; 2011 // 2012 // case IOSP_EXT_4_STATUS: 2013 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2014 // break; 2015 // 2016 case IOSP_STATUS_MSR: 2017 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2018 2019 // Process this new modem status and generate appropriate 2020 // events, etc, based on the new status. This routine 2021 // also saves the MSR in Port->ShadowMsr. 2022 handle_new_msr(edge_port, byte2); 2023 break; 2024 2025 default: 2026 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code); 2027 break; 2028 } 2029 2030 return; 2031} 2032 2033 2034/***************************************************************************** 2035 * edge_tty_recv 2036 * this function passes data on to the tty flip buffer 2037 *****************************************************************************/ 2038static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length) 2039{ 2040 int cnt; 2041 2042 do { 2043 cnt = tty_buffer_request_room(tty, length); 2044 if (cnt < length) { 2045 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2046 __FUNCTION__, length - cnt); 2047 if(cnt == 0) 2048 break; 2049 } 2050 tty_insert_flip_string(tty, data, cnt); 2051 data += cnt; 2052 length -= cnt; 2053 } while (length > 0); 2054 2055 tty_flip_buffer_push(tty); 2056} 2057 2058 2059/***************************************************************************** 2060 * handle_new_msr 2061 * this function handles any change to the msr register for a port. 2062 *****************************************************************************/ 2063static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2064{ 2065 struct async_icount *icount; 2066 2067 dbg("%s %02x", __FUNCTION__, newMsr); 2068 2069 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2070 icount = &edge_port->icount; 2071 2072 /* update input line counters */ 2073 if (newMsr & EDGEPORT_MSR_DELTA_CTS) { 2074 icount->cts++; 2075 } 2076 if (newMsr & EDGEPORT_MSR_DELTA_DSR) { 2077 icount->dsr++; 2078 } 2079 if (newMsr & EDGEPORT_MSR_DELTA_CD) { 2080 icount->dcd++; 2081 } 2082 if (newMsr & EDGEPORT_MSR_DELTA_RI) { 2083 icount->rng++; 2084 } 2085 wake_up_interruptible(&edge_port->delta_msr_wait); 2086 } 2087 2088 /* Save the new modem status */ 2089 edge_port->shadowMSR = newMsr & 0xf0; 2090 2091 return; 2092} 2093 2094 2095/***************************************************************************** 2096 * handle_new_lsr 2097 * this function handles any change to the lsr register for a port. 2098 *****************************************************************************/ 2099static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data) 2100{ 2101 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2102 struct async_icount *icount; 2103 2104 dbg("%s - %02x", __FUNCTION__, newLsr); 2105 2106 edge_port->shadowLSR = lsr; 2107 2108 if (newLsr & LSR_BREAK) { 2109 // 2110 // Parity and Framing errors only count if they 2111 // occur exclusive of a break being 2112 // received. 2113 // 2114 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2115 } 2116 2117 /* Place LSR data byte into Rx buffer */ 2118 if (lsrData && edge_port->port->tty) 2119 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1); 2120 2121 /* update input line counters */ 2122 icount = &edge_port->icount; 2123 if (newLsr & LSR_BREAK) { 2124 icount->brk++; 2125 } 2126 if (newLsr & LSR_OVER_ERR) { 2127 icount->overrun++; 2128 } 2129 if (newLsr & LSR_PAR_ERR) { 2130 icount->parity++; 2131 } 2132 if (newLsr & LSR_FRM_ERR) { 2133 icount->frame++; 2134 } 2135 2136 return; 2137} 2138 2139 2140/**************************************************************************** 2141 * sram_write 2142 * writes a number of bytes to the Edgeport device's sram starting at the 2143 * given address. 2144 * If successful returns the number of bytes written, otherwise it returns 2145 * a negative error number of the problem. 2146 ****************************************************************************/ 2147static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2148{ 2149 int result; 2150 __u16 current_length; 2151 unsigned char *transfer_buffer; 2152 2153 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2154 2155 transfer_buffer = kmalloc (64, GFP_KERNEL); 2156 if (!transfer_buffer) { 2157 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2158 return -ENOMEM; 2159 } 2160 2161 /* need to split these writes up into 64 byte chunks */ 2162 result = 0; 2163 while (length > 0) { 2164 if (length > 64) { 2165 current_length = 64; 2166 } else { 2167 current_length = length; 2168 } 2169// dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2170 memcpy (transfer_buffer, data, current_length); 2171 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM, 2172 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2173 if (result < 0) 2174 break; 2175 length -= current_length; 2176 addr += current_length; 2177 data += current_length; 2178 } 2179 2180 kfree (transfer_buffer); 2181 return result; 2182} 2183 2184 2185/**************************************************************************** 2186 * rom_write 2187 * writes a number of bytes to the Edgeport device's ROM starting at the 2188 * given address. 2189 * If successful returns the number of bytes written, otherwise it returns 2190 * a negative error number of the problem. 2191 ****************************************************************************/ 2192static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2193{ 2194 int result; 2195 __u16 current_length; 2196 unsigned char *transfer_buffer; 2197 2198// dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2199 2200 transfer_buffer = kmalloc (64, GFP_KERNEL); 2201 if (!transfer_buffer) { 2202 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2203 return -ENOMEM; 2204 } 2205 2206 /* need to split these writes up into 64 byte chunks */ 2207 result = 0; 2208 while (length > 0) { 2209 if (length > 64) { 2210 current_length = 64; 2211 } else { 2212 current_length = length; 2213 } 2214// dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2215 memcpy (transfer_buffer, data, current_length); 2216 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM, 2217 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2218 if (result < 0) 2219 break; 2220 length -= current_length; 2221 addr += current_length; 2222 data += current_length; 2223 } 2224 2225 kfree (transfer_buffer); 2226 return result; 2227} 2228 2229 2230/**************************************************************************** 2231 * rom_read 2232 * reads a number of bytes from the Edgeport device starting at the given 2233 * address. 2234 * If successful returns the number of bytes read, otherwise it returns 2235 * a negative error number of the problem. 2236 ****************************************************************************/ 2237static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2238{ 2239 int result; 2240 __u16 current_length; 2241 unsigned char *transfer_buffer; 2242 2243 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2244 2245 transfer_buffer = kmalloc (64, GFP_KERNEL); 2246 if (!transfer_buffer) { 2247 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2248 return -ENOMEM; 2249 } 2250 2251 /* need to split these reads up into 64 byte chunks */ 2252 result = 0; 2253 while (length > 0) { 2254 if (length > 64) { 2255 current_length = 64; 2256 } else { 2257 current_length = length; 2258 } 2259// dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2260 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM, 2261 0xC0, addr, extAddr, transfer_buffer, current_length, 300); 2262 if (result < 0) 2263 break; 2264 memcpy (data, transfer_buffer, current_length); 2265 length -= current_length; 2266 addr += current_length; 2267 data += current_length; 2268 } 2269 2270 kfree (transfer_buffer); 2271 return result; 2272} 2273 2274 2275/**************************************************************************** 2276 * send_iosp_ext_cmd 2277 * Is used to send a IOSP message to the Edgeport device 2278 ****************************************************************************/ 2279static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param) 2280{ 2281 unsigned char *buffer; 2282 unsigned char *currentCommand; 2283 int length = 0; 2284 int status = 0; 2285 2286 dbg("%s - %d, %d", __FUNCTION__, command, param); 2287 2288 buffer = kmalloc (10, GFP_ATOMIC); 2289 if (!buffer) { 2290 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10); 2291 return -ENOMEM; 2292 } 2293 2294 currentCommand = buffer; 2295 2296 MAKE_CMD_EXT_CMD (¤tCommand, &length, 2297 edge_port->port->number - edge_port->port->serial->minor, 2298 command, param); 2299 2300 status = write_cmd_usb (edge_port, buffer, length); 2301 if (status) { 2302 /* something bad happened, let's free up the memory */ 2303 kfree(buffer); 2304 } 2305 2306 return status; 2307} 2308 2309 2310/***************************************************************************** 2311 * write_cmd_usb 2312 * this function writes the given buffer out to the bulk write endpoint. 2313 *****************************************************************************/ 2314static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length) 2315{ 2316 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2317 int status = 0; 2318 struct urb *urb; 2319 int timeout; 2320 2321 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer); 2322 2323 /* Allocate our next urb */ 2324 urb = usb_alloc_urb (0, GFP_ATOMIC); 2325 if (!urb) 2326 return -ENOMEM; 2327 2328 CmdUrbs++; 2329 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 2330 2331 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 2332 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 2333 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2334 2335 edge_port->commandPending = TRUE; 2336 status = usb_submit_urb(urb, GFP_ATOMIC); 2337 2338 if (status) { 2339 /* something went wrong */ 2340 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status); 2341 usb_kill_urb(urb); 2342 usb_free_urb(urb); 2343 CmdUrbs--; 2344 return status; 2345 } 2346 2347 // wait for command to finish 2348 timeout = COMMAND_TIMEOUT; 2349#if 0 2350 wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE)); 2351 2352 if (edge_port->commandPending == TRUE) { 2353 /* command timed out */ 2354 dbg("%s - command timed out", __FUNCTION__); 2355 status = -EINVAL; 2356 } 2357#endif 2358 return status; 2359} 2360 2361 2362/***************************************************************************** 2363 * send_cmd_write_baud_rate 2364 * this function sends the proper command to change the baud rate of the 2365 * specified port. 2366 *****************************************************************************/ 2367static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate) 2368{ 2369 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2370 unsigned char *cmdBuffer; 2371 unsigned char *currCmd; 2372 int cmdLen = 0; 2373 int divisor; 2374 int status; 2375 unsigned char number = edge_port->port->number - edge_port->port->serial->minor; 2376 2377 if ((!edge_serial->is_epic) || 2378 ((edge_serial->is_epic) && 2379 (!edge_serial->epic_descriptor.Supports.IOSPSetBaudRate))) { 2380 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2381 edge_port->port->number, baudRate); 2382 return 0; 2383 } 2384 2385 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); 2386 2387 status = calc_baud_rate_divisor (baudRate, &divisor); 2388 if (status) { 2389 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__); 2390 return status; 2391 } 2392 2393 // Alloc memory for the string of commands. 2394 cmdBuffer = kmalloc (0x100, GFP_ATOMIC); 2395 if (!cmdBuffer) { 2396 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); 2397 return -ENOMEM; 2398 } 2399 currCmd = cmdBuffer; 2400 2401 // Enable access to divisor latch 2402 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); 2403 2404 // Write the divisor itself 2405 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); 2406 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); 2407 2408 // Restore original value to disable access to divisor latch 2409 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); 2410 2411 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); 2412 if (status) { 2413 /* something bad happened, let's free up the memory */ 2414 kfree (cmdBuffer); 2415 } 2416 2417 return status; 2418} 2419 2420 2421/***************************************************************************** 2422 * calc_baud_rate_divisor 2423 * this function calculates the proper baud rate divisor for the specified 2424 * baud rate. 2425 *****************************************************************************/ 2426static int calc_baud_rate_divisor (int baudrate, int *divisor) 2427{ 2428 int i; 2429 __u16 custom; 2430 2431 2432 dbg("%s - %d", __FUNCTION__, baudrate); 2433 2434 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2435 if ( divisor_table[i].BaudRate == baudrate ) { 2436 *divisor = divisor_table[i].Divisor; 2437 return 0; 2438 } 2439 } 2440 2441 // We have tried all of the standard baud rates 2442 // lets try to calculate the divisor for this baud rate 2443 // Make sure the baud rate is reasonable 2444 if (baudrate > 50 && baudrate < 230400) { 2445 // get divisor 2446 custom = (__u16)((230400L + baudrate/2) / baudrate); 2447 2448 *divisor = custom; 2449 2450 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); 2451 return 0; 2452 } 2453 2454 return -1; 2455} 2456 2457 2458/***************************************************************************** 2459 * send_cmd_write_uart_register 2460 * this function builds up a uart register message and sends to to the device. 2461 *****************************************************************************/ 2462static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) 2463{ 2464 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2465 unsigned char *cmdBuffer; 2466 unsigned char *currCmd; 2467 unsigned long cmdLen = 0; 2468 int status; 2469 2470 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); 2471 2472 if ((!edge_serial->is_epic) || 2473 ((edge_serial->is_epic) && 2474 (!edge_serial->epic_descriptor.Supports.IOSPWriteMCR) && 2475 (regNum == MCR))) { 2476 dbg("SendCmdWriteUartReg - Not writting to MCR Register"); 2477 return 0; 2478 } 2479 2480 if ((!edge_serial->is_epic) || 2481 ((edge_serial->is_epic) && 2482 (!edge_serial->epic_descriptor.Supports.IOSPWriteLCR) && 2483 (regNum == LCR))) { 2484 dbg ("SendCmdWriteUartReg - Not writting to LCR Register"); 2485 return 0; 2486 } 2487 2488 // Alloc memory for the string of commands. 2489 cmdBuffer = kmalloc (0x10, GFP_ATOMIC); 2490 if (cmdBuffer == NULL ) { 2491 return -ENOMEM; 2492 } 2493 2494 currCmd = cmdBuffer; 2495 2496 // Build a cmd in the buffer to write the given register 2497 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, 2498 edge_port->port->number - edge_port->port->serial->minor, 2499 regNum, regValue); 2500 2501 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2502 if (status) { 2503 /* something bad happened, let's free up the memory */ 2504 kfree (cmdBuffer); 2505 } 2506 2507 return status; 2508} 2509 2510 2511/***************************************************************************** 2512 * change_port_settings 2513 * This routine is called to set the UART on the device to match the specified 2514 * new settings. 2515 *****************************************************************************/ 2516#ifndef CMSPAR 2517#define CMSPAR 0 2518#endif 2519static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios) 2520{ 2521 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2522 struct tty_struct *tty; 2523 int baud; 2524 unsigned cflag; 2525 __u8 mask = 0xff; 2526 __u8 lData; 2527 __u8 lParity; 2528 __u8 lStop; 2529 __u8 rxFlow; 2530 __u8 txFlow; 2531 int status; 2532 2533 dbg("%s - port %d", __FUNCTION__, edge_port->port->number); 2534 2535 if ((!edge_port->open) && 2536 (!edge_port->openPending)) { 2537 dbg("%s - port not opened", __FUNCTION__); 2538 return; 2539 } 2540 2541 tty = edge_port->port->tty; 2542 if ((!tty) || 2543 (!tty->termios)) { 2544 dbg("%s - no tty structures", __FUNCTION__); 2545 return; 2546 } 2547 2548 cflag = tty->termios->c_cflag; 2549 2550 switch (cflag & CSIZE) { 2551 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; 2552 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; 2553 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; 2554 default: 2555 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; 2556 } 2557 2558 lParity = LCR_PAR_NONE; 2559 if (cflag & PARENB) { 2560 if (cflag & CMSPAR) { 2561 if (cflag & PARODD) { 2562 lParity = LCR_PAR_MARK; 2563 dbg("%s - parity = mark", __FUNCTION__); 2564 } else { 2565 lParity = LCR_PAR_SPACE; 2566 dbg("%s - parity = space", __FUNCTION__); 2567 } 2568 } else if (cflag & PARODD) { 2569 lParity = LCR_PAR_ODD; 2570 dbg("%s - parity = odd", __FUNCTION__); 2571 } else { 2572 lParity = LCR_PAR_EVEN; 2573 dbg("%s - parity = even", __FUNCTION__); 2574 } 2575 } else { 2576 dbg("%s - parity = none", __FUNCTION__); 2577 } 2578 2579 if (cflag & CSTOPB) { 2580 lStop = LCR_STOP_2; 2581 dbg("%s - stop bits = 2", __FUNCTION__); 2582 } else { 2583 lStop = LCR_STOP_1; 2584 dbg("%s - stop bits = 1", __FUNCTION__); 2585 } 2586 2587 /* figure out the flow control settings */ 2588 rxFlow = txFlow = 0x00; 2589 if (cflag & CRTSCTS) { 2590 rxFlow |= IOSP_RX_FLOW_RTS; 2591 txFlow |= IOSP_TX_FLOW_CTS; 2592 dbg("%s - RTS/CTS is enabled", __FUNCTION__); 2593 } else { 2594 dbg("%s - RTS/CTS is disabled", __FUNCTION__); 2595 } 2596 2597 /* if we are implementing XON/XOFF, set the start and stop character in the device */ 2598 if (I_IXOFF(tty) || I_IXON(tty)) { 2599 unsigned char stop_char = STOP_CHAR(tty); 2600 unsigned char start_char = START_CHAR(tty); 2601 2602 if ((!edge_serial->is_epic) || 2603 ((edge_serial->is_epic) && 2604 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2605 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char); 2606 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); 2607 } 2608 2609 /* if we are implementing INBOUND XON/XOFF */ 2610 if (I_IXOFF(tty)) { 2611 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2612 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2613 } else { 2614 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); 2615 } 2616 2617 /* if we are implementing OUTBOUND XON/XOFF */ 2618 if (I_IXON(tty)) { 2619 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2620 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2621 } else { 2622 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); 2623 } 2624 } 2625 2626 /* Set flow control to the configured value */ 2627 if ((!edge_serial->is_epic) || 2628 ((edge_serial->is_epic) && 2629 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2630 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2631 if ((!edge_serial->is_epic) || 2632 ((edge_serial->is_epic) && 2633 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2634 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2635 2636 2637 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2638 edge_port->shadowLCR |= (lData | lParity | lStop); 2639 2640 edge_port->validDataMask = mask; 2641 2642 /* Send the updated LCR value to the EdgePort */ 2643 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); 2644 if (status != 0) { 2645 return; 2646 } 2647 2648 /* set up the MCR register and send it to the EdgePort */ 2649 edge_port->shadowMCR = MCR_MASTER_IE; 2650 if (cflag & CBAUD) { 2651 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2652 } 2653 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 2654 if (status != 0) { 2655 return; 2656 } 2657 2658 /* Determine divisor based on baud rate */ 2659 baud = tty_get_baud_rate(tty); 2660 if (!baud) { 2661 /* pick a default, any default... */ 2662 baud = 9600; 2663 } 2664 2665 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2666 status = send_cmd_write_baud_rate (edge_port, baud); 2667 2668 return; 2669} 2670 2671 2672/**************************************************************************** 2673 * unicode_to_ascii 2674 * Turns a string from Unicode into ASCII. 2675 * Doesn't do a good job with any characters that are outside the normal 2676 * ASCII range, but it's only for debugging... 2677 * NOTE: expects the unicode in LE format 2678 ****************************************************************************/ 2679static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size) 2680{ 2681 int i; 2682 2683 if (buflen <= 0) /* never happens, but... */ 2684 return; 2685 --buflen; /* space for nul */ 2686 2687 for (i = 0; i < unicode_size; i++) { 2688 if (i >= buflen) 2689 break; 2690 string[i] = (char)(le16_to_cpu(unicode[i])); 2691 } 2692 string[i] = 0x00; 2693} 2694 2695 2696/**************************************************************************** 2697 * get_manufacturing_desc 2698 * reads in the manufacturing descriptor and stores it into the serial 2699 * structure. 2700 ****************************************************************************/ 2701static void get_manufacturing_desc (struct edgeport_serial *edge_serial) 2702{ 2703 int response; 2704 2705 dbg("getting manufacturer descriptor"); 2706 2707 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2708 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, 2709 (__u8 *)(&edge_serial->manuf_descriptor)); 2710 2711 if (response < 1) { 2712 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n"); 2713 } else { 2714 char string[30]; 2715 dbg("**Manufacturer Descriptor"); 2716 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); 2717 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); 2718 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); 2719 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); 2720 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); 2721 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); 2722 unicode_to_ascii(string, sizeof(string), 2723 edge_serial->manuf_descriptor.SerialNumber, 2724 edge_serial->manuf_descriptor.SerNumLength/2); 2725 dbg(" SerialNumber: %s", string); 2726 unicode_to_ascii(string, sizeof(string), 2727 edge_serial->manuf_descriptor.AssemblyNumber, 2728 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2729 dbg(" AssemblyNumber: %s", string); 2730 unicode_to_ascii(string, sizeof(string), 2731 edge_serial->manuf_descriptor.OemAssyNumber, 2732 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2733 dbg(" OemAssyNumber: %s", string); 2734 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); 2735 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); 2736 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); 2737 } 2738} 2739 2740 2741/**************************************************************************** 2742 * get_boot_desc 2743 * reads in the bootloader descriptor and stores it into the serial 2744 * structure. 2745 ****************************************************************************/ 2746static void get_boot_desc (struct edgeport_serial *edge_serial) 2747{ 2748 int response; 2749 2750 dbg("getting boot descriptor"); 2751 2752 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2753 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, 2754 (__u8 *)(&edge_serial->boot_descriptor)); 2755 2756 if (response < 1) { 2757 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n"); 2758 } else { 2759 dbg("**Boot Descriptor:"); 2760 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2761 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); 2762 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); 2763 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2764 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2765 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); 2766 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); 2767 } 2768} 2769 2770 2771/**************************************************************************** 2772 * load_application_firmware 2773 * This is called to load the application firmware to the device 2774 ****************************************************************************/ 2775static void load_application_firmware (struct edgeport_serial *edge_serial) 2776{ 2777 struct edge_firmware_image_record *record; 2778 unsigned char *firmware; 2779 unsigned char *FirmwareImage; 2780 int ImageSize; 2781 int response; 2782 2783 2784 switch (edge_serial->product_info.iDownloadFile) { 2785 case EDGE_DOWNLOAD_FILE_I930: 2786 dbg("downloading firmware version (930) %d.%d.%d", 2787 OperationalCodeImageVersion_GEN1.MajorVersion, 2788 OperationalCodeImageVersion_GEN1.MinorVersion, 2789 OperationalCodeImageVersion_GEN1.BuildNumber); 2790 firmware = &OperationalCodeImage_GEN1[0]; 2791 FirmwareImage = &OperationalCodeImage_GEN1[0]; 2792 ImageSize = sizeof(OperationalCodeImage_GEN1); 2793 break; 2794 2795 case EDGE_DOWNLOAD_FILE_80251: 2796 dbg("downloading firmware version (80251) %d.%d.%d", 2797 OperationalCodeImageVersion_GEN2.MajorVersion, 2798 OperationalCodeImageVersion_GEN2.MinorVersion, 2799 OperationalCodeImageVersion_GEN2.BuildNumber); 2800 firmware = &OperationalCodeImage_GEN2[0]; 2801 FirmwareImage = &OperationalCodeImage_GEN2[0]; 2802 ImageSize = sizeof(OperationalCodeImage_GEN2); 2803 break; 2804 2805 case EDGE_DOWNLOAD_FILE_NONE: 2806 dbg ("No download file specified, skipping download\n"); 2807 return; 2808 2809 default: 2810 return; 2811 } 2812 2813 2814 for (;;) { 2815 record = (struct edge_firmware_image_record *)firmware; 2816 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 2817 if (response < 0) { 2818 dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 2819 break; 2820 } 2821 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 2822 if (firmware >= &FirmwareImage[ImageSize]) { 2823 break; 2824 } 2825 } 2826 2827 dbg("sending exec_dl_code"); 2828 response = usb_control_msg (edge_serial->serial->dev, 2829 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2830 USB_REQUEST_ION_EXEC_DL_CODE, 2831 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2832 2833 return; 2834} 2835 2836 2837/**************************************************************************** 2838 * edge_startup 2839 ****************************************************************************/ 2840static int edge_startup (struct usb_serial *serial) 2841{ 2842 struct edgeport_serial *edge_serial; 2843 struct edgeport_port *edge_port; 2844 struct usb_device *dev; 2845 int i, j; 2846 int response; 2847 int interrupt_in_found; 2848 int bulk_in_found; 2849 int bulk_out_found; 2850 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2851 EDGE_COMPATIBILITY_MASK1, 2852 EDGE_COMPATIBILITY_MASK2 }; 2853 2854 dev = serial->dev; 2855 2856 /* create our private serial structure */ 2857 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2858 if (edge_serial == NULL) { 2859 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2860 return -ENOMEM; 2861 } 2862 spin_lock_init(&edge_serial->es_lock); 2863 edge_serial->serial = serial; 2864 usb_set_serial_data(serial, edge_serial); 2865 2866 /* get the name for the device from the device */ 2867 i = get_string(dev, dev->descriptor.iManufacturer, 2868 &edge_serial->name[0], MAX_NAME_LEN+1); 2869 edge_serial->name[i++] = ' '; 2870 get_string(dev, dev->descriptor.iProduct, 2871 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2872 2873 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2874 2875 /* Read the epic descriptor */ 2876 if (get_epic_descriptor(edge_serial) <= 0) { 2877 /* memcpy descriptor to Supports structures */ 2878 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2879 sizeof(struct edge_compatibility_bits)); 2880 2881 /* get the manufacturing descriptor for this device */ 2882 get_manufacturing_desc (edge_serial); 2883 2884 /* get the boot descriptor */ 2885 get_boot_desc (edge_serial); 2886 2887 get_product_info(edge_serial); 2888 } 2889 2890 /* set the number of ports from the manufacturing description */ 2891 /* serial->num_ports = serial->product_info.NumPorts; */ 2892 if ((!edge_serial->is_epic) && 2893 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2894 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 2895 "vs. core thinking we have %d ports, email " 2896 "greg@kroah.com this information.", 2897 edge_serial->product_info.NumPorts, 2898 serial->num_ports); 2899 } 2900 2901 dbg("%s - time 1 %ld", __FUNCTION__, jiffies); 2902 2903 /* If not an EPiC device */ 2904 if (!edge_serial->is_epic) { 2905 /* now load the application firmware into this device */ 2906 load_application_firmware (edge_serial); 2907 2908 dbg("%s - time 2 %ld", __FUNCTION__, jiffies); 2909 2910 /* Check current Edgeport EEPROM and update if necessary */ 2911 update_edgeport_E2PROM (edge_serial); 2912 2913 dbg("%s - time 3 %ld", __FUNCTION__, jiffies); 2914 2915 /* set the configuration to use #1 */ 2916// dbg("set_configuration 1"); 2917// usb_set_configuration (dev, 1); 2918 } 2919 2920 /* we set up the pointers to the endpoints in the edge_open function, 2921 * as the structures aren't created yet. */ 2922 2923 /* set up our port private structures */ 2924 for (i = 0; i < serial->num_ports; ++i) { 2925 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); 2926 if (edge_port == NULL) { 2927 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2928 for (j = 0; j < i; ++j) { 2929 kfree (usb_get_serial_port_data(serial->port[j])); 2930 usb_set_serial_port_data(serial->port[j], NULL); 2931 } 2932 usb_set_serial_data(serial, NULL); 2933 kfree(edge_serial); 2934 return -ENOMEM; 2935 } 2936 memset (edge_port, 0, sizeof(struct edgeport_port)); 2937 spin_lock_init(&edge_port->ep_lock); 2938 edge_port->port = serial->port[i]; 2939 usb_set_serial_port_data(serial->port[i], edge_port); 2940 } 2941 2942 response = 0; 2943 2944 if (edge_serial->is_epic) { 2945 /* EPIC thing, set up our interrupt polling now and our read urb, so 2946 * that the device knows it really is connected. */ 2947 interrupt_in_found = bulk_in_found = bulk_out_found = FALSE; 2948 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) { 2949 struct usb_endpoint_descriptor *endpoint; 2950 int buffer_size; 2951 2952 endpoint = &serial->interface->altsetting[0].endpoint[i].desc; 2953 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 2954 if ((!interrupt_in_found) && 2955 (usb_endpoint_is_int_in(endpoint))) { 2956 /* we found a interrupt in endpoint */ 2957 dbg("found interrupt in"); 2958 2959 /* not set up yet, so do it now */ 2960 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL); 2961 if (!edge_serial->interrupt_read_urb) { 2962 err("out of memory"); 2963 return -ENOMEM; 2964 } 2965 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2966 if (!edge_serial->interrupt_in_buffer) { 2967 err("out of memory"); 2968 usb_free_urb(edge_serial->interrupt_read_urb); 2969 return -ENOMEM; 2970 } 2971 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress; 2972 2973 /* set up our interrupt urb */ 2974 usb_fill_int_urb(edge_serial->interrupt_read_urb, 2975 dev, 2976 usb_rcvintpipe(dev, endpoint->bEndpointAddress), 2977 edge_serial->interrupt_in_buffer, 2978 buffer_size, 2979 edge_interrupt_callback, 2980 edge_serial, 2981 endpoint->bInterval); 2982 2983 interrupt_in_found = TRUE; 2984 } 2985 2986 if ((!bulk_in_found) && 2987 (usb_endpoint_is_bulk_in(endpoint))) { 2988 /* we found a bulk in endpoint */ 2989 dbg("found bulk in"); 2990 2991 /* not set up yet, so do it now */ 2992 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL); 2993 if (!edge_serial->read_urb) { 2994 err("out of memory"); 2995 return -ENOMEM; 2996 } 2997 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2998 if (!edge_serial->bulk_in_buffer) { 2999 err ("out of memory"); 3000 usb_free_urb(edge_serial->read_urb); 3001 return -ENOMEM; 3002 } 3003 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress; 3004 3005 /* set up our bulk in urb */ 3006 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3007 usb_rcvbulkpipe(dev, endpoint->bEndpointAddress), 3008 edge_serial->bulk_in_buffer, 3009 endpoint->wMaxPacketSize, 3010 edge_bulk_in_callback, 3011 edge_serial); 3012 bulk_in_found = TRUE; 3013 } 3014 3015 if ((!bulk_out_found) && 3016 (usb_endpoint_is_bulk_out(endpoint))) { 3017 /* we found a bulk out endpoint */ 3018 dbg("found bulk out"); 3019 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress; 3020 bulk_out_found = TRUE; 3021 } 3022 } 3023 3024 if ((!interrupt_in_found) || (!bulk_in_found) || (!bulk_out_found)) { 3025 err ("Error - the proper endpoints were not found!"); 3026 return -ENODEV; 3027 } 3028 3029 /* start interrupt read for this edgeport this interrupt will 3030 * continue as long as the edgeport is connected */ 3031 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL); 3032 if (response) 3033 err("%s - Error %d submitting control urb", __FUNCTION__, response); 3034 } 3035 return response; 3036} 3037 3038 3039/**************************************************************************** 3040 * edge_shutdown 3041 * This function is called whenever the device is removed from the usb bus. 3042 ****************************************************************************/ 3043static void edge_shutdown (struct usb_serial *serial) 3044{ 3045 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3046 int i; 3047 3048 dbg("%s", __FUNCTION__); 3049 3050 /* stop reads and writes on all ports */ 3051 for (i=0; i < serial->num_ports; ++i) { 3052 kfree (usb_get_serial_port_data(serial->port[i])); 3053 usb_set_serial_port_data(serial->port[i], NULL); 3054 } 3055 /* free up our endpoint stuff */ 3056 if (edge_serial->is_epic) { 3057 usb_unlink_urb(edge_serial->interrupt_read_urb); 3058 usb_free_urb(edge_serial->interrupt_read_urb); 3059 kfree(edge_serial->interrupt_in_buffer); 3060 3061 usb_unlink_urb(edge_serial->read_urb); 3062 usb_free_urb(edge_serial->read_urb); 3063 kfree(edge_serial->bulk_in_buffer); 3064 } 3065 3066 kfree(edge_serial); 3067 usb_set_serial_data(serial, NULL); 3068} 3069 3070 3071/**************************************************************************** 3072 * edgeport_init 3073 * This is called by the module subsystem, or on startup to initialize us 3074 ****************************************************************************/ 3075static int __init edgeport_init(void) 3076{ 3077 int retval; 3078 3079 retval = usb_serial_register(&edgeport_2port_device); 3080 if (retval) 3081 goto failed_2port_device_register; 3082 retval = usb_serial_register(&edgeport_4port_device); 3083 if (retval) 3084 goto failed_4port_device_register; 3085 retval = usb_serial_register(&edgeport_8port_device); 3086 if (retval) 3087 goto failed_8port_device_register; 3088 retval = usb_serial_register(&epic_device); 3089 if (retval) 3090 goto failed_epic_device_register; 3091 retval = usb_register(&io_driver); 3092 if (retval) 3093 goto failed_usb_register; 3094 info(DRIVER_DESC " " DRIVER_VERSION); 3095 return 0; 3096 3097failed_usb_register: 3098 usb_serial_deregister(&epic_device); 3099failed_epic_device_register: 3100 usb_serial_deregister(&edgeport_8port_device); 3101failed_8port_device_register: 3102 usb_serial_deregister(&edgeport_4port_device); 3103failed_4port_device_register: 3104 usb_serial_deregister(&edgeport_2port_device); 3105failed_2port_device_register: 3106 return retval; 3107} 3108 3109 3110/**************************************************************************** 3111 * edgeport_exit 3112 * Called when the driver is about to be unloaded. 3113 ****************************************************************************/ 3114static void __exit edgeport_exit (void) 3115{ 3116 usb_deregister (&io_driver); 3117 usb_serial_deregister (&edgeport_2port_device); 3118 usb_serial_deregister (&edgeport_4port_device); 3119 usb_serial_deregister (&edgeport_8port_device); 3120 usb_serial_deregister (&epic_device); 3121} 3122 3123module_init(edgeport_init); 3124module_exit(edgeport_exit); 3125 3126/* Module information */ 3127MODULE_AUTHOR( DRIVER_AUTHOR ); 3128MODULE_DESCRIPTION( DRIVER_DESC ); 3129MODULE_LICENSE("GPL"); 3130 3131module_param(debug, bool, S_IRUGO | S_IWUSR); 3132MODULE_PARM_DESC(debug, "Debug enabled or not"); 3133 3134module_param(low_latency, bool, S_IRUGO | S_IWUSR); 3135MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 3136