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