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 int 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, struct file *file, 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, struct file *file); 223 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 224 unsigned int set, unsigned int clear); 225 static int edge_startup(struct usb_serial *serial); 226 static void edge_disconnect(struct usb_serial *serial); 227 static void edge_release(struct usb_serial *serial); 228 229 #include "io_tables.h" /* all of the devices that this driver supports */ 230 231 /* function prototypes for all of our local functions */ 232 233 static void process_rcvd_data(struct edgeport_serial *edge_serial, 234 unsigned char *buffer, __u16 bufferLength); 235 static void process_rcvd_status(struct edgeport_serial *edge_serial, 236 __u8 byte2, __u8 byte3); 237 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 238 unsigned char *data, int length); 239 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 240 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 241 __u8 lsr, __u8 data); 242 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 243 __u8 param); 244 static int calc_baud_rate_divisor(int baud_rate, int *divisor); 245 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 246 int baudRate); 247 static void change_port_settings(struct tty_struct *tty, 248 struct edgeport_port *edge_port, 249 struct ktermios *old_termios); 250 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 251 __u8 regNum, __u8 regValue); 252 static int write_cmd_usb(struct edgeport_port *edge_port, 253 unsigned char *buffer, int writeLength); 254 static void send_more_port_data(struct edgeport_serial *edge_serial, 255 struct edgeport_port *edge_port); 256 257 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 258 __u16 length, const __u8 *data); 259 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 260 __u16 length, __u8 *data); 261 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 262 __u16 length, const __u8 *data); 263 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 264 static void get_boot_desc(struct edgeport_serial *edge_serial); 265 static void load_application_firmware(struct edgeport_serial *edge_serial); 266 267 static void unicode_to_ascii(char *string, int buflen, 268 __le16 *unicode, int unicode_size); 269 270 271 /* ************************************************************************ */ 272 /* ************************************************************************ */ 273 /* ************************************************************************ */ 274 /* ************************************************************************ */ 275 276 /************************************************************************ 277 * * 278 * update_edgeport_E2PROM() Compare current versions of * 279 * Boot ROM and Manufacture * 280 * Descriptors with versions * 281 * embedded in this driver * 282 * * 283 ************************************************************************/ 284 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 285 { 286 __u32 BootCurVer; 287 __u32 BootNewVer; 288 __u8 BootMajorVersion; 289 __u8 BootMinorVersion; 290 __u16 BootBuildNumber; 291 __u32 Bootaddr; 292 const struct ihex_binrec *rec; 293 const struct firmware *fw; 294 const char *fw_name; 295 int response; 296 297 switch (edge_serial->product_info.iDownloadFile) { 298 case EDGE_DOWNLOAD_FILE_I930: 299 fw_name = "edgeport/boot.fw"; 300 break; 301 case EDGE_DOWNLOAD_FILE_80251: 302 fw_name = "edgeport/boot2.fw"; 303 break; 304 default: 305 return; 306 } 307 308 response = request_ihex_firmware(&fw, fw_name, 309 &edge_serial->serial->dev->dev); 310 if (response) { 311 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 312 fw_name, response); 313 return; 314 } 315 316 rec = (const struct ihex_binrec *)fw->data; 317 BootMajorVersion = rec->data[0]; 318 BootMinorVersion = rec->data[1]; 319 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 320 321 /* Check Boot Image Version */ 322 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 323 (edge_serial->boot_descriptor.MinorVersion << 16) + 324 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 325 326 BootNewVer = (BootMajorVersion << 24) + 327 (BootMinorVersion << 16) + 328 BootBuildNumber; 329 330 dbg("Current Boot Image version %d.%d.%d", 331 edge_serial->boot_descriptor.MajorVersion, 332 edge_serial->boot_descriptor.MinorVersion, 333 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 334 335 336 if (BootNewVer > BootCurVer) { 337 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 338 edge_serial->boot_descriptor.MajorVersion, 339 edge_serial->boot_descriptor.MinorVersion, 340 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 341 BootMajorVersion, BootMinorVersion, BootBuildNumber); 342 343 dbg("Downloading new Boot Image"); 344 345 for (rec = ihex_next_binrec(rec); rec; 346 rec = ihex_next_binrec(rec)) { 347 Bootaddr = be32_to_cpu(rec->addr); 348 response = rom_write(edge_serial->serial, 349 Bootaddr >> 16, 350 Bootaddr & 0xFFFF, 351 be16_to_cpu(rec->len), 352 &rec->data[0]); 353 if (response < 0) { 354 dev_err(&edge_serial->serial->dev->dev, 355 "rom_write failed (%x, %x, %d)\n", 356 Bootaddr >> 16, Bootaddr & 0xFFFF, 357 be16_to_cpu(rec->len)); 358 break; 359 } 360 } 361 } else { 362 dbg("Boot Image -- already up to date"); 363 } 364 release_firmware(fw); 365 } 366 367 #if 0 368 /************************************************************************ 369 * 370 * Get string descriptor from device 371 * 372 ************************************************************************/ 373 static int get_string_desc(struct usb_device *dev, int Id, 374 struct usb_string_descriptor **pRetDesc) 375 { 376 struct usb_string_descriptor StringDesc; 377 struct usb_string_descriptor *pStringDesc; 378 379 dbg("%s - USB String ID = %d", __func__, Id); 380 381 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 382 sizeof(StringDesc))) 383 return 0; 384 385 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 386 if (!pStringDesc) 387 return -1; 388 389 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 390 StringDesc.bLength)) { 391 kfree(pStringDesc); 392 return -1; 393 } 394 395 *pRetDesc = pStringDesc; 396 return 0; 397 } 398 #endif 399 400 static void dump_product_info(struct edgeport_product_info *product_info) 401 { 402 /* Dump Product Info structure */ 403 dbg("**Product Information:"); 404 dbg(" ProductId %x", product_info->ProductId); 405 dbg(" NumPorts %d", product_info->NumPorts); 406 dbg(" ProdInfoVer %d", product_info->ProdInfoVer); 407 dbg(" IsServer %d", product_info->IsServer); 408 dbg(" IsRS232 %d", product_info->IsRS232); 409 dbg(" IsRS422 %d", product_info->IsRS422); 410 dbg(" IsRS485 %d", product_info->IsRS485); 411 dbg(" RomSize %d", product_info->RomSize); 412 dbg(" RamSize %d", product_info->RamSize); 413 dbg(" CpuRev %x", product_info->CpuRev); 414 dbg(" BoardRev %x", product_info->BoardRev); 415 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 416 product_info->BootMinorVersion, 417 le16_to_cpu(product_info->BootBuildNumber)); 418 dbg(" FirmwareMajorVersion %d.%d.%d", 419 product_info->FirmwareMajorVersion, 420 product_info->FirmwareMinorVersion, 421 le16_to_cpu(product_info->FirmwareBuildNumber)); 422 dbg(" ManufactureDescDate %d/%d/%d", 423 product_info->ManufactureDescDate[0], 424 product_info->ManufactureDescDate[1], 425 product_info->ManufactureDescDate[2]+1900); 426 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 427 dbg(" EpicVer %d", product_info->EpicVer); 428 } 429 430 static void get_product_info(struct edgeport_serial *edge_serial) 431 { 432 struct edgeport_product_info *product_info = &edge_serial->product_info; 433 434 memset(product_info, 0, sizeof(struct edgeport_product_info)); 435 436 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 437 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 438 product_info->ProdInfoVer = 0; 439 440 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 441 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 442 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 443 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 444 445 product_info->BootMajorVersion = 446 edge_serial->boot_descriptor.MajorVersion; 447 product_info->BootMinorVersion = 448 edge_serial->boot_descriptor.MinorVersion; 449 product_info->BootBuildNumber = 450 edge_serial->boot_descriptor.BuildNumber; 451 452 memcpy(product_info->ManufactureDescDate, 453 edge_serial->manuf_descriptor.DescDate, 454 sizeof(edge_serial->manuf_descriptor.DescDate)); 455 456 /* check if this is 2nd generation hardware */ 457 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 458 & ION_DEVICE_ID_80251_NETCHIP) 459 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 460 else 461 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 462 463 /* Determine Product type and set appropriate flags */ 464 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 465 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 466 case ION_DEVICE_ID_EDGEPORT_4T: 467 case ION_DEVICE_ID_EDGEPORT_4: 468 case ION_DEVICE_ID_EDGEPORT_2: 469 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 470 case ION_DEVICE_ID_EDGEPORT_8: 471 case ION_DEVICE_ID_EDGEPORT_421: 472 case ION_DEVICE_ID_EDGEPORT_21: 473 case ION_DEVICE_ID_EDGEPORT_2_DIN: 474 case ION_DEVICE_ID_EDGEPORT_4_DIN: 475 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 476 product_info->IsRS232 = 1; 477 break; 478 479 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 480 product_info->IsRS422 = 1; 481 product_info->IsRS485 = 1; 482 break; 483 484 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 485 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 486 product_info->IsRS422 = 1; 487 break; 488 } 489 490 dump_product_info(product_info); 491 } 492 493 static int get_epic_descriptor(struct edgeport_serial *ep) 494 { 495 int result; 496 struct usb_serial *serial = ep->serial; 497 struct edgeport_product_info *product_info = &ep->product_info; 498 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 499 struct edge_compatibility_bits *bits; 500 501 ep->is_epic = 0; 502 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 503 USB_REQUEST_ION_GET_EPIC_DESC, 504 0xC0, 0x00, 0x00, 505 &ep->epic_descriptor, 506 sizeof(struct edge_compatibility_descriptor), 507 300); 508 509 dbg("%s result = %d", __func__, result); 510 511 if (result > 0) { 512 ep->is_epic = 1; 513 memset(product_info, 0, sizeof(struct edgeport_product_info)); 514 515 product_info->NumPorts = epic->NumPorts; 516 product_info->ProdInfoVer = 0; 517 product_info->FirmwareMajorVersion = epic->MajorVersion; 518 product_info->FirmwareMinorVersion = epic->MinorVersion; 519 product_info->FirmwareBuildNumber = epic->BuildNumber; 520 product_info->iDownloadFile = epic->iDownloadFile; 521 product_info->EpicVer = epic->EpicVer; 522 product_info->Epic = epic->Supports; 523 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 524 dump_product_info(product_info); 525 526 bits = &ep->epic_descriptor.Supports; 527 dbg("**EPIC descriptor:"); 528 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE"); 529 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE"); 530 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE"); 531 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE"); 532 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 533 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 534 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE"); 535 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE"); 536 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 537 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 538 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 539 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 540 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE"); 541 } 542 543 return result; 544 } 545 546 547 /************************************************************************/ 548 /************************************************************************/ 549 /* U S B C A L L B A C K F U N C T I O N S */ 550 /* U S B C A L L B A C K F U N C T I O N S */ 551 /************************************************************************/ 552 /************************************************************************/ 553 554 /***************************************************************************** 555 * edge_interrupt_callback 556 * this is the callback function for when we have received data on the 557 * interrupt endpoint. 558 *****************************************************************************/ 559 static void edge_interrupt_callback(struct urb *urb) 560 { 561 struct edgeport_serial *edge_serial = urb->context; 562 struct edgeport_port *edge_port; 563 struct usb_serial_port *port; 564 struct tty_struct *tty; 565 unsigned char *data = urb->transfer_buffer; 566 int length = urb->actual_length; 567 int bytes_avail; 568 int position; 569 int txCredits; 570 int portNumber; 571 int result; 572 int status = urb->status; 573 574 dbg("%s", __func__); 575 576 switch (status) { 577 case 0: 578 /* success */ 579 break; 580 case -ECONNRESET: 581 case -ENOENT: 582 case -ESHUTDOWN: 583 /* this urb is terminated, clean up */ 584 dbg("%s - urb shutting down with status: %d", 585 __func__, status); 586 return; 587 default: 588 dbg("%s - nonzero urb status received: %d", __func__, status); 589 goto exit; 590 } 591 592 /* process this interrupt-read even if there are no ports open */ 593 if (length) { 594 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 595 __func__, length, data); 596 597 if (length > 1) { 598 bytes_avail = data[0] | (data[1] << 8); 599 if (bytes_avail) { 600 spin_lock(&edge_serial->es_lock); 601 edge_serial->rxBytesAvail += bytes_avail; 602 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 603 604 if (edge_serial->rxBytesAvail > 0 && 605 !edge_serial->read_in_progress) { 606 dbg("%s - posting a read", __func__); 607 edge_serial->read_in_progress = true; 608 609 /* we have pending bytes on the 610 bulk in pipe, send a request */ 611 edge_serial->read_urb->dev = edge_serial->serial->dev; 612 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 613 if (result) { 614 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result); 615 edge_serial->read_in_progress = false; 616 } 617 } 618 spin_unlock(&edge_serial->es_lock); 619 } 620 } 621 /* grab the txcredits for the ports if available */ 622 position = 2; 623 portNumber = 0; 624 while ((position < length) && 625 (portNumber < edge_serial->serial->num_ports)) { 626 txCredits = data[position] | (data[position+1] << 8); 627 if (txCredits) { 628 port = edge_serial->serial->port[portNumber]; 629 edge_port = usb_get_serial_port_data(port); 630 if (edge_port->open) { 631 spin_lock(&edge_port->ep_lock); 632 edge_port->txCredits += txCredits; 633 spin_unlock(&edge_port->ep_lock); 634 dbg("%s - txcredits for port%d = %d", 635 __func__, portNumber, 636 edge_port->txCredits); 637 638 /* tell the tty driver that something 639 has changed */ 640 tty = tty_port_tty_get( 641 &edge_port->port->port); 642 if (tty) { 643 tty_wakeup(tty); 644 tty_kref_put(tty); 645 } 646 /* Since we have more credit, check 647 if more data can be sent */ 648 send_more_port_data(edge_serial, 649 edge_port); 650 } 651 } 652 position += 2; 653 ++portNumber; 654 } 655 } 656 657 exit: 658 result = usb_submit_urb(urb, GFP_ATOMIC); 659 if (result) 660 dev_err(&urb->dev->dev, 661 "%s - Error %d submitting control urb\n", 662 __func__, result); 663 } 664 665 666 /***************************************************************************** 667 * edge_bulk_in_callback 668 * this is the callback function for when we have received data on the 669 * bulk in endpoint. 670 *****************************************************************************/ 671 static void edge_bulk_in_callback(struct urb *urb) 672 { 673 struct edgeport_serial *edge_serial = urb->context; 674 unsigned char *data = urb->transfer_buffer; 675 int retval; 676 __u16 raw_data_length; 677 int status = urb->status; 678 679 dbg("%s", __func__); 680 681 if (status) { 682 dbg("%s - nonzero read bulk status received: %d", 683 __func__, status); 684 edge_serial->read_in_progress = false; 685 return; 686 } 687 688 if (urb->actual_length == 0) { 689 dbg("%s - read bulk callback with no data", __func__); 690 edge_serial->read_in_progress = false; 691 return; 692 } 693 694 raw_data_length = urb->actual_length; 695 696 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 697 __func__, raw_data_length, data); 698 699 spin_lock(&edge_serial->es_lock); 700 701 /* decrement our rxBytes available by the number that we just got */ 702 edge_serial->rxBytesAvail -= raw_data_length; 703 704 dbg("%s - Received = %d, rxBytesAvail %d", __func__, 705 raw_data_length, edge_serial->rxBytesAvail); 706 707 process_rcvd_data(edge_serial, data, urb->actual_length); 708 709 /* check to see if there's any more data for us to read */ 710 if (edge_serial->rxBytesAvail > 0) { 711 dbg("%s - posting a read", __func__); 712 edge_serial->read_urb->dev = edge_serial->serial->dev; 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 urb->dev = edge_serial->serial->dev; 1332 status = usb_submit_urb(urb, GFP_ATOMIC); 1333 if (status) { 1334 /* something went wrong */ 1335 dev_err(&edge_port->port->dev, 1336 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1337 __func__, status); 1338 edge_port->write_in_progress = false; 1339 1340 /* revert the credits as something bad happened. */ 1341 edge_port->txCredits += count; 1342 edge_port->icount.tx -= count; 1343 } 1344 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", 1345 __func__, count, edge_port->txCredits, fifo->count); 1346 1347 exit_send: 1348 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1349 } 1350 1351 1352 /***************************************************************************** 1353 * edge_write_room 1354 * this function is called by the tty driver when it wants to know how 1355 * many bytes of data we can accept for a specific port. If successful, 1356 * we return the amount of room that we have for this port (the txCredits) 1357 * otherwise we return a negative error number. 1358 *****************************************************************************/ 1359 static int edge_write_room(struct tty_struct *tty) 1360 { 1361 struct usb_serial_port *port = tty->driver_data; 1362 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1363 int room; 1364 unsigned long flags; 1365 1366 dbg("%s", __func__); 1367 1368 if (edge_port == NULL) 1369 return 0; 1370 if (edge_port->closePending) 1371 return 0; 1372 1373 dbg("%s - port %d", __func__, port->number); 1374 1375 if (!edge_port->open) { 1376 dbg("%s - port not opened", __func__); 1377 return 0; 1378 } 1379 1380 /* total of both buffers is still txCredit */ 1381 spin_lock_irqsave(&edge_port->ep_lock, flags); 1382 room = edge_port->txCredits - edge_port->txfifo.count; 1383 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1384 1385 dbg("%s - returns %d", __func__, room); 1386 return room; 1387 } 1388 1389 1390 /***************************************************************************** 1391 * edge_chars_in_buffer 1392 * this function is called by the tty driver when it wants to know how 1393 * many bytes of data we currently have outstanding in the port (data that 1394 * has been written, but hasn't made it out the port yet) 1395 * If successful, we return the number of bytes left to be written in the 1396 * system, 1397 * Otherwise we return a negative error number. 1398 *****************************************************************************/ 1399 static int edge_chars_in_buffer(struct tty_struct *tty) 1400 { 1401 struct usb_serial_port *port = tty->driver_data; 1402 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1403 int num_chars; 1404 unsigned long flags; 1405 1406 dbg("%s", __func__); 1407 1408 if (edge_port == NULL) 1409 return 0; 1410 if (edge_port->closePending) 1411 return 0; 1412 1413 if (!edge_port->open) { 1414 dbg("%s - port not opened", __func__); 1415 return 0; 1416 } 1417 1418 spin_lock_irqsave(&edge_port->ep_lock, flags); 1419 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1420 edge_port->txfifo.count; 1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1422 if (num_chars) { 1423 dbg("%s(port %d) - returns %d", __func__, 1424 port->number, num_chars); 1425 } 1426 1427 return num_chars; 1428 } 1429 1430 1431 /***************************************************************************** 1432 * SerialThrottle 1433 * this function is called by the tty driver when it wants to stop the data 1434 * being read from the port. 1435 *****************************************************************************/ 1436 static void edge_throttle(struct tty_struct *tty) 1437 { 1438 struct usb_serial_port *port = tty->driver_data; 1439 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1440 int status; 1441 1442 dbg("%s - port %d", __func__, port->number); 1443 1444 if (edge_port == NULL) 1445 return; 1446 1447 if (!edge_port->open) { 1448 dbg("%s - port not opened", __func__); 1449 return; 1450 } 1451 1452 /* if we are implementing XON/XOFF, send the stop character */ 1453 if (I_IXOFF(tty)) { 1454 unsigned char stop_char = STOP_CHAR(tty); 1455 status = edge_write(tty, port, &stop_char, 1); 1456 if (status <= 0) 1457 return; 1458 } 1459 1460 /* if we are implementing RTS/CTS, toggle that line */ 1461 if (tty->termios->c_cflag & CRTSCTS) { 1462 edge_port->shadowMCR &= ~MCR_RTS; 1463 status = send_cmd_write_uart_register(edge_port, MCR, 1464 edge_port->shadowMCR); 1465 if (status != 0) 1466 return; 1467 } 1468 1469 return; 1470 } 1471 1472 1473 /***************************************************************************** 1474 * edge_unthrottle 1475 * this function is called by the tty driver when it wants to resume the 1476 * data being read from the port (called after SerialThrottle is called) 1477 *****************************************************************************/ 1478 static void edge_unthrottle(struct tty_struct *tty) 1479 { 1480 struct usb_serial_port *port = tty->driver_data; 1481 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1482 int status; 1483 1484 dbg("%s - port %d", __func__, port->number); 1485 1486 if (edge_port == NULL) 1487 return; 1488 1489 if (!edge_port->open) { 1490 dbg("%s - port not opened", __func__); 1491 return; 1492 } 1493 1494 /* if we are implementing XON/XOFF, send the start character */ 1495 if (I_IXOFF(tty)) { 1496 unsigned char start_char = START_CHAR(tty); 1497 status = edge_write(tty, port, &start_char, 1); 1498 if (status <= 0) 1499 return; 1500 } 1501 /* if we are implementing RTS/CTS, toggle that line */ 1502 if (tty->termios->c_cflag & CRTSCTS) { 1503 edge_port->shadowMCR |= MCR_RTS; 1504 send_cmd_write_uart_register(edge_port, MCR, 1505 edge_port->shadowMCR); 1506 } 1507 } 1508 1509 1510 /***************************************************************************** 1511 * SerialSetTermios 1512 * this function is called by the tty driver when it wants to change 1513 * the termios structure 1514 *****************************************************************************/ 1515 static void edge_set_termios(struct tty_struct *tty, 1516 struct usb_serial_port *port, struct ktermios *old_termios) 1517 { 1518 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1519 unsigned int cflag; 1520 1521 cflag = tty->termios->c_cflag; 1522 dbg("%s - clfag %08x iflag %08x", __func__, 1523 tty->termios->c_cflag, tty->termios->c_iflag); 1524 dbg("%s - old clfag %08x old iflag %08x", __func__, 1525 old_termios->c_cflag, old_termios->c_iflag); 1526 1527 dbg("%s - port %d", __func__, port->number); 1528 1529 if (edge_port == NULL) 1530 return; 1531 1532 if (!edge_port->open) { 1533 dbg("%s - port not opened", __func__); 1534 return; 1535 } 1536 1537 /* change the port settings to the new ones specified */ 1538 change_port_settings(tty, edge_port, old_termios); 1539 } 1540 1541 1542 /***************************************************************************** 1543 * get_lsr_info - get line status register info 1544 * 1545 * Purpose: Let user call ioctl() to get info when the UART physically 1546 * is emptied. On bus types like RS485, the transmitter must 1547 * release the bus after transmitting. This must be done when 1548 * the transmit shift register is empty, not be done when the 1549 * transmit holding register is empty. This functionality 1550 * allows an RS485 driver to be written in user space. 1551 *****************************************************************************/ 1552 static int get_lsr_info(struct edgeport_port *edge_port, 1553 unsigned int __user *value) 1554 { 1555 unsigned int result = 0; 1556 unsigned long flags; 1557 1558 spin_lock_irqsave(&edge_port->ep_lock, flags); 1559 if (edge_port->maxTxCredits == edge_port->txCredits && 1560 edge_port->txfifo.count == 0) { 1561 dbg("%s -- Empty", __func__); 1562 result = TIOCSER_TEMT; 1563 } 1564 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1565 1566 if (copy_to_user(value, &result, sizeof(int))) 1567 return -EFAULT; 1568 return 0; 1569 } 1570 1571 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 1572 unsigned int set, unsigned int clear) 1573 { 1574 struct usb_serial_port *port = tty->driver_data; 1575 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1576 unsigned int mcr; 1577 1578 dbg("%s - port %d", __func__, port->number); 1579 1580 mcr = edge_port->shadowMCR; 1581 if (set & TIOCM_RTS) 1582 mcr |= MCR_RTS; 1583 if (set & TIOCM_DTR) 1584 mcr |= MCR_DTR; 1585 if (set & TIOCM_LOOP) 1586 mcr |= MCR_LOOPBACK; 1587 1588 if (clear & TIOCM_RTS) 1589 mcr &= ~MCR_RTS; 1590 if (clear & TIOCM_DTR) 1591 mcr &= ~MCR_DTR; 1592 if (clear & TIOCM_LOOP) 1593 mcr &= ~MCR_LOOPBACK; 1594 1595 edge_port->shadowMCR = mcr; 1596 1597 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1598 1599 return 0; 1600 } 1601 1602 static int edge_tiocmget(struct tty_struct *tty, struct file *file) 1603 { 1604 struct usb_serial_port *port = tty->driver_data; 1605 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1606 unsigned int result = 0; 1607 unsigned int msr; 1608 unsigned int mcr; 1609 1610 dbg("%s - port %d", __func__, port->number); 1611 1612 msr = edge_port->shadowMSR; 1613 mcr = edge_port->shadowMCR; 1614 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1615 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1616 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1617 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1618 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1619 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1620 1621 1622 dbg("%s -- %x", __func__, result); 1623 1624 return result; 1625 } 1626 1627 static int get_serial_info(struct edgeport_port *edge_port, 1628 struct serial_struct __user *retinfo) 1629 { 1630 struct serial_struct tmp; 1631 1632 if (!retinfo) 1633 return -EFAULT; 1634 1635 memset(&tmp, 0, sizeof(tmp)); 1636 1637 tmp.type = PORT_16550A; 1638 tmp.line = edge_port->port->serial->minor; 1639 tmp.port = edge_port->port->number; 1640 tmp.irq = 0; 1641 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1642 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1643 tmp.baud_base = 9600; 1644 tmp.close_delay = 5*HZ; 1645 tmp.closing_wait = 30*HZ; 1646 1647 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1648 return -EFAULT; 1649 return 0; 1650 } 1651 1652 1653 1654 /***************************************************************************** 1655 * SerialIoctl 1656 * this function handles any ioctl calls to the driver 1657 *****************************************************************************/ 1658 static int edge_ioctl(struct tty_struct *tty, struct file *file, 1659 unsigned int cmd, unsigned long arg) 1660 { 1661 struct usb_serial_port *port = tty->driver_data; 1662 DEFINE_WAIT(wait); 1663 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1664 struct async_icount cnow; 1665 struct async_icount cprev; 1666 struct serial_icounter_struct icount; 1667 1668 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 1669 1670 switch (cmd) { 1671 case TIOCSERGETLSR: 1672 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 1673 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1674 1675 case TIOCGSERIAL: 1676 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 1677 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1678 1679 case TIOCMIWAIT: 1680 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 1681 cprev = edge_port->icount; 1682 while (1) { 1683 prepare_to_wait(&edge_port->delta_msr_wait, 1684 &wait, TASK_INTERRUPTIBLE); 1685 schedule(); 1686 finish_wait(&edge_port->delta_msr_wait, &wait); 1687 /* see if a signal did it */ 1688 if (signal_pending(current)) 1689 return -ERESTARTSYS; 1690 cnow = edge_port->icount; 1691 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1692 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1693 return -EIO; /* no change => error */ 1694 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1695 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1696 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1697 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 1698 return 0; 1699 } 1700 cprev = cnow; 1701 } 1702 /* NOTREACHED */ 1703 break; 1704 1705 case TIOCGICOUNT: 1706 cnow = edge_port->icount; 1707 memset(&icount, 0, sizeof(icount)); 1708 icount.cts = cnow.cts; 1709 icount.dsr = cnow.dsr; 1710 icount.rng = cnow.rng; 1711 icount.dcd = cnow.dcd; 1712 icount.rx = cnow.rx; 1713 icount.tx = cnow.tx; 1714 icount.frame = cnow.frame; 1715 icount.overrun = cnow.overrun; 1716 icount.parity = cnow.parity; 1717 icount.brk = cnow.brk; 1718 icount.buf_overrun = cnow.buf_overrun; 1719 1720 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", 1721 __func__, port->number, icount.rx, icount.tx); 1722 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1723 return -EFAULT; 1724 return 0; 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 return; 1775 } 1776 1777 1778 /***************************************************************************** 1779 * process_rcvd_data 1780 * this function handles the data received on the bulk in pipe. 1781 *****************************************************************************/ 1782 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1783 unsigned char *buffer, __u16 bufferLength) 1784 { 1785 struct usb_serial_port *port; 1786 struct edgeport_port *edge_port; 1787 struct tty_struct *tty; 1788 __u16 lastBufferLength; 1789 __u16 rxLen; 1790 1791 dbg("%s", __func__); 1792 1793 lastBufferLength = bufferLength + 1; 1794 1795 while (bufferLength > 0) { 1796 /* failsafe incase we get a message that we don't understand */ 1797 if (lastBufferLength == bufferLength) { 1798 dbg("%s - stuck in loop, exiting it.", __func__); 1799 break; 1800 } 1801 lastBufferLength = bufferLength; 1802 1803 switch (edge_serial->rxState) { 1804 case EXPECT_HDR1: 1805 edge_serial->rxHeader1 = *buffer; 1806 ++buffer; 1807 --bufferLength; 1808 1809 if (bufferLength == 0) { 1810 edge_serial->rxState = EXPECT_HDR2; 1811 break; 1812 } 1813 /* otherwise, drop on through */ 1814 case EXPECT_HDR2: 1815 edge_serial->rxHeader2 = *buffer; 1816 ++buffer; 1817 --bufferLength; 1818 1819 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, 1820 edge_serial->rxHeader1, edge_serial->rxHeader2); 1821 /* Process depending on whether this header is 1822 * data or status */ 1823 1824 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1825 /* Decode this status header and go to 1826 * EXPECT_HDR1 (if we can process the status 1827 * with only 2 bytes), or go to EXPECT_HDR3 to 1828 * get the third byte. */ 1829 edge_serial->rxPort = 1830 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1831 edge_serial->rxStatusCode = 1832 IOSP_GET_STATUS_CODE( 1833 edge_serial->rxHeader1); 1834 1835 if (!IOSP_STATUS_IS_2BYTE( 1836 edge_serial->rxStatusCode)) { 1837 /* This status needs additional bytes. 1838 * Save what we have and then wait for 1839 * more data. 1840 */ 1841 edge_serial->rxStatusParam 1842 = edge_serial->rxHeader2; 1843 edge_serial->rxState = EXPECT_HDR3; 1844 break; 1845 } 1846 /* We have all the header bytes, process the 1847 status now */ 1848 process_rcvd_status(edge_serial, 1849 edge_serial->rxHeader2, 0); 1850 edge_serial->rxState = EXPECT_HDR1; 1851 break; 1852 } else { 1853 edge_serial->rxPort = 1854 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1855 edge_serial->rxBytesRemaining = 1856 IOSP_GET_HDR_DATA_LEN( 1857 edge_serial->rxHeader1, 1858 edge_serial->rxHeader2); 1859 dbg("%s - Data for Port %u Len %u", 1860 __func__, 1861 edge_serial->rxPort, 1862 edge_serial->rxBytesRemaining); 1863 1864 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1865 * ASSERT(DevExt->RxBytesRemaining < 1866 * IOSP_MAX_DATA_LENGTH); 1867 */ 1868 1869 if (bufferLength == 0) { 1870 edge_serial->rxState = EXPECT_DATA; 1871 break; 1872 } 1873 /* Else, drop through */ 1874 } 1875 case EXPECT_DATA: /* Expect data */ 1876 if (bufferLength < edge_serial->rxBytesRemaining) { 1877 rxLen = bufferLength; 1878 /* Expect data to start next buffer */ 1879 edge_serial->rxState = EXPECT_DATA; 1880 } else { 1881 /* BufLen >= RxBytesRemaining */ 1882 rxLen = edge_serial->rxBytesRemaining; 1883 /* Start another header next time */ 1884 edge_serial->rxState = EXPECT_HDR1; 1885 } 1886 1887 bufferLength -= rxLen; 1888 edge_serial->rxBytesRemaining -= rxLen; 1889 1890 /* spit this data back into the tty driver if this 1891 port is open */ 1892 if (rxLen) { 1893 port = edge_serial->serial->port[ 1894 edge_serial->rxPort]; 1895 edge_port = usb_get_serial_port_data(port); 1896 if (edge_port->open) { 1897 tty = tty_port_tty_get( 1898 &edge_port->port->port); 1899 if (tty) { 1900 dbg("%s - Sending %d bytes to TTY for port %d", 1901 __func__, rxLen, edge_serial->rxPort); 1902 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1903 tty_kref_put(tty); 1904 } 1905 edge_port->icount.rx += rxLen; 1906 } 1907 buffer += rxLen; 1908 } 1909 break; 1910 1911 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1912 edge_serial->rxHeader3 = *buffer; 1913 ++buffer; 1914 --bufferLength; 1915 1916 /* We have all the header bytes, process the 1917 status now */ 1918 process_rcvd_status(edge_serial, 1919 edge_serial->rxStatusParam, 1920 edge_serial->rxHeader3); 1921 edge_serial->rxState = EXPECT_HDR1; 1922 break; 1923 } 1924 } 1925 } 1926 1927 1928 /***************************************************************************** 1929 * process_rcvd_status 1930 * this function handles the any status messages received on the 1931 * bulk in pipe. 1932 *****************************************************************************/ 1933 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1934 __u8 byte2, __u8 byte3) 1935 { 1936 struct usb_serial_port *port; 1937 struct edgeport_port *edge_port; 1938 struct tty_struct *tty; 1939 __u8 code = edge_serial->rxStatusCode; 1940 1941 /* switch the port pointer to the one being currently talked about */ 1942 port = edge_serial->serial->port[edge_serial->rxPort]; 1943 edge_port = usb_get_serial_port_data(port); 1944 if (edge_port == NULL) { 1945 dev_err(&edge_serial->serial->dev->dev, 1946 "%s - edge_port == NULL for port %d\n", 1947 __func__, edge_serial->rxPort); 1948 return; 1949 } 1950 1951 dbg("%s - port %d", __func__, edge_serial->rxPort); 1952 1953 if (code == IOSP_EXT_STATUS) { 1954 switch (byte2) { 1955 case IOSP_EXT_STATUS_CHASE_RSP: 1956 /* we want to do EXT status regardless of port 1957 * open/closed */ 1958 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", 1959 __func__, edge_serial->rxPort, byte3); 1960 /* Currently, the only EXT_STATUS is Chase, so process 1961 * here instead of one more call to one more subroutine 1962 * If/when more EXT_STATUS, there'll be more work to do 1963 * Also, we currently clear flag and close the port 1964 * regardless of content of above's Byte3. 1965 * We could choose to do something else when Byte3 says 1966 * Timeout on Chase from Edgeport, like wait longer in 1967 * block_until_chase_response, but for now we don't. 1968 */ 1969 edge_port->chaseResponsePending = false; 1970 wake_up(&edge_port->wait_chase); 1971 return; 1972 1973 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1974 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3); 1975 /* Port->RxCheckRsp = true; */ 1976 return; 1977 } 1978 } 1979 1980 if (code == IOSP_STATUS_OPEN_RSP) { 1981 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1982 edge_port->maxTxCredits = edge_port->txCredits; 1983 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 1984 handle_new_msr(edge_port, byte2); 1985 1986 /* send the current line settings to the port so we are 1987 in sync with any further termios calls */ 1988 tty = tty_port_tty_get(&edge_port->port->port); 1989 if (tty) { 1990 change_port_settings(tty, 1991 edge_port, tty->termios); 1992 tty_kref_put(tty); 1993 } 1994 1995 /* we have completed the open */ 1996 edge_port->openPending = false; 1997 edge_port->open = true; 1998 wake_up(&edge_port->wait_open); 1999 return; 2000 } 2001 2002 /* If port is closed, silently discard all rcvd status. We can 2003 * have cases where buffered status is received AFTER the close 2004 * port command is sent to the Edgeport. 2005 */ 2006 if (!edge_port->open || edge_port->closePending) 2007 return; 2008 2009 switch (code) { 2010 /* Not currently sent by Edgeport */ 2011 case IOSP_STATUS_LSR: 2012 dbg("%s - Port %u LSR Status = %02x", 2013 __func__, edge_serial->rxPort, byte2); 2014 handle_new_lsr(edge_port, false, byte2, 0); 2015 break; 2016 2017 case IOSP_STATUS_LSR_DATA: 2018 dbg("%s - Port %u LSR Status = %02x, Data = %02x", 2019 __func__, edge_serial->rxPort, byte2, byte3); 2020 /* byte2 is LSR Register */ 2021 /* byte3 is broken data byte */ 2022 handle_new_lsr(edge_port, true, byte2, byte3); 2023 break; 2024 /* 2025 * case IOSP_EXT_4_STATUS: 2026 * dbg("%s - Port %u LSR Status = %02x Data = %02x", 2027 * __func__, edge_serial->rxPort, byte2, byte3); 2028 * break; 2029 */ 2030 case IOSP_STATUS_MSR: 2031 dbg("%s - Port %u MSR Status = %02x", 2032 __func__, edge_serial->rxPort, byte2); 2033 /* 2034 * Process this new modem status and generate appropriate 2035 * events, etc, based on the new status. This routine 2036 * also saves the MSR in Port->ShadowMsr. 2037 */ 2038 handle_new_msr(edge_port, byte2); 2039 break; 2040 2041 default: 2042 dbg("%s - Unrecognized IOSP status code %u", __func__, code); 2043 break; 2044 } 2045 return; 2046 } 2047 2048 2049 /***************************************************************************** 2050 * edge_tty_recv 2051 * this function passes data on to the tty flip buffer 2052 *****************************************************************************/ 2053 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 2054 unsigned char *data, int length) 2055 { 2056 int cnt; 2057 2058 cnt = tty_insert_flip_string(tty, data, length); 2059 if (cnt < length) { 2060 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2061 __func__, length - cnt); 2062 } 2063 data += cnt; 2064 length -= cnt; 2065 2066 tty_flip_buffer_push(tty); 2067 } 2068 2069 2070 /***************************************************************************** 2071 * handle_new_msr 2072 * this function handles any change to the msr register for a port. 2073 *****************************************************************************/ 2074 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2075 { 2076 struct async_icount *icount; 2077 2078 dbg("%s %02x", __func__, newMsr); 2079 2080 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2081 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2082 icount = &edge_port->icount; 2083 2084 /* update input line counters */ 2085 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2086 icount->cts++; 2087 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2088 icount->dsr++; 2089 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2090 icount->dcd++; 2091 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2092 icount->rng++; 2093 wake_up_interruptible(&edge_port->delta_msr_wait); 2094 } 2095 2096 /* Save the new modem status */ 2097 edge_port->shadowMSR = newMsr & 0xf0; 2098 2099 return; 2100 } 2101 2102 2103 /***************************************************************************** 2104 * handle_new_lsr 2105 * this function handles any change to the lsr register for a port. 2106 *****************************************************************************/ 2107 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2108 __u8 lsr, __u8 data) 2109 { 2110 __u8 newLsr = (__u8) (lsr & (__u8) 2111 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2112 struct async_icount *icount; 2113 2114 dbg("%s - %02x", __func__, newLsr); 2115 2116 edge_port->shadowLSR = lsr; 2117 2118 if (newLsr & LSR_BREAK) { 2119 /* 2120 * Parity and Framing errors only count if they 2121 * occur exclusive of a break being 2122 * received. 2123 */ 2124 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2125 } 2126 2127 /* Place LSR data byte into Rx buffer */ 2128 if (lsrData) { 2129 struct tty_struct *tty = 2130 tty_port_tty_get(&edge_port->port->port); 2131 if (tty) { 2132 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 2133 tty_kref_put(tty); 2134 } 2135 } 2136 /* update input line counters */ 2137 icount = &edge_port->icount; 2138 if (newLsr & LSR_BREAK) 2139 icount->brk++; 2140 if (newLsr & LSR_OVER_ERR) 2141 icount->overrun++; 2142 if (newLsr & LSR_PAR_ERR) 2143 icount->parity++; 2144 if (newLsr & LSR_FRM_ERR) 2145 icount->frame++; 2146 2147 return; 2148 } 2149 2150 2151 /**************************************************************************** 2152 * sram_write 2153 * writes a number of bytes to the Edgeport device's sram starting at the 2154 * given address. 2155 * If successful returns the number of bytes written, otherwise it returns 2156 * a negative error number of the problem. 2157 ****************************************************************************/ 2158 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2159 __u16 length, const __u8 *data) 2160 { 2161 int result; 2162 __u16 current_length; 2163 unsigned char *transfer_buffer; 2164 2165 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2166 2167 transfer_buffer = kmalloc(64, GFP_KERNEL); 2168 if (!transfer_buffer) { 2169 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2170 __func__, 64); 2171 return -ENOMEM; 2172 } 2173 2174 /* need to split these writes up into 64 byte chunks */ 2175 result = 0; 2176 while (length > 0) { 2177 if (length > 64) 2178 current_length = 64; 2179 else 2180 current_length = length; 2181 2182 /* dbg("%s - writing %x, %x, %d", __func__, 2183 extAddr, addr, current_length); */ 2184 memcpy(transfer_buffer, data, current_length); 2185 result = usb_control_msg(serial->dev, 2186 usb_sndctrlpipe(serial->dev, 0), 2187 USB_REQUEST_ION_WRITE_RAM, 2188 0x40, addr, extAddr, transfer_buffer, 2189 current_length, 300); 2190 if (result < 0) 2191 break; 2192 length -= current_length; 2193 addr += current_length; 2194 data += current_length; 2195 } 2196 2197 kfree(transfer_buffer); 2198 return result; 2199 } 2200 2201 2202 /**************************************************************************** 2203 * rom_write 2204 * writes a number of bytes to the Edgeport device's ROM starting at the 2205 * given address. 2206 * If successful returns the number of bytes written, otherwise it returns 2207 * a negative error number of the problem. 2208 ****************************************************************************/ 2209 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2210 __u16 length, const __u8 *data) 2211 { 2212 int result; 2213 __u16 current_length; 2214 unsigned char *transfer_buffer; 2215 2216 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */ 2217 2218 transfer_buffer = kmalloc(64, GFP_KERNEL); 2219 if (!transfer_buffer) { 2220 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2221 __func__, 64); 2222 return -ENOMEM; 2223 } 2224 2225 /* need to split these writes up into 64 byte chunks */ 2226 result = 0; 2227 while (length > 0) { 2228 if (length > 64) 2229 current_length = 64; 2230 else 2231 current_length = length; 2232 /* dbg("%s - writing %x, %x, %d", __func__, 2233 extAddr, addr, current_length); */ 2234 memcpy(transfer_buffer, data, current_length); 2235 result = usb_control_msg(serial->dev, 2236 usb_sndctrlpipe(serial->dev, 0), 2237 USB_REQUEST_ION_WRITE_ROM, 0x40, 2238 addr, extAddr, 2239 transfer_buffer, current_length, 300); 2240 if (result < 0) 2241 break; 2242 length -= current_length; 2243 addr += current_length; 2244 data += current_length; 2245 } 2246 2247 kfree(transfer_buffer); 2248 return result; 2249 } 2250 2251 2252 /**************************************************************************** 2253 * rom_read 2254 * reads a number of bytes from the Edgeport device starting at the given 2255 * address. 2256 * If successful returns the number of bytes read, otherwise it returns 2257 * a negative error number of the problem. 2258 ****************************************************************************/ 2259 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2260 __u16 addr, __u16 length, __u8 *data) 2261 { 2262 int result; 2263 __u16 current_length; 2264 unsigned char *transfer_buffer; 2265 2266 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2267 2268 transfer_buffer = kmalloc(64, GFP_KERNEL); 2269 if (!transfer_buffer) { 2270 dev_err(&serial->dev->dev, 2271 "%s - kmalloc(%d) failed.\n", __func__, 64); 2272 return -ENOMEM; 2273 } 2274 2275 /* need to split these reads up into 64 byte chunks */ 2276 result = 0; 2277 while (length > 0) { 2278 if (length > 64) 2279 current_length = 64; 2280 else 2281 current_length = length; 2282 /* dbg("%s - %x, %x, %d", __func__, 2283 extAddr, addr, current_length); */ 2284 result = usb_control_msg(serial->dev, 2285 usb_rcvctrlpipe(serial->dev, 0), 2286 USB_REQUEST_ION_READ_ROM, 2287 0xC0, addr, extAddr, transfer_buffer, 2288 current_length, 300); 2289 if (result < 0) 2290 break; 2291 memcpy(data, transfer_buffer, current_length); 2292 length -= current_length; 2293 addr += current_length; 2294 data += current_length; 2295 } 2296 2297 kfree(transfer_buffer); 2298 return result; 2299 } 2300 2301 2302 /**************************************************************************** 2303 * send_iosp_ext_cmd 2304 * Is used to send a IOSP message to the Edgeport device 2305 ****************************************************************************/ 2306 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2307 __u8 command, __u8 param) 2308 { 2309 unsigned char *buffer; 2310 unsigned char *currentCommand; 2311 int length = 0; 2312 int status = 0; 2313 2314 dbg("%s - %d, %d", __func__, command, param); 2315 2316 buffer = kmalloc(10, GFP_ATOMIC); 2317 if (!buffer) { 2318 dev_err(&edge_port->port->dev, 2319 "%s - kmalloc(%d) failed.\n", __func__, 10); 2320 return -ENOMEM; 2321 } 2322 2323 currentCommand = buffer; 2324 2325 MAKE_CMD_EXT_CMD(¤tCommand, &length, 2326 edge_port->port->number - edge_port->port->serial->minor, 2327 command, param); 2328 2329 status = write_cmd_usb(edge_port, buffer, length); 2330 if (status) { 2331 /* something bad happened, let's free up the memory */ 2332 kfree(buffer); 2333 } 2334 2335 return status; 2336 } 2337 2338 2339 /***************************************************************************** 2340 * write_cmd_usb 2341 * this function writes the given buffer out to the bulk write endpoint. 2342 *****************************************************************************/ 2343 static int write_cmd_usb(struct edgeport_port *edge_port, 2344 unsigned char *buffer, int length) 2345 { 2346 struct edgeport_serial *edge_serial = 2347 usb_get_serial_data(edge_port->port->serial); 2348 int status = 0; 2349 struct urb *urb; 2350 int timeout; 2351 2352 usb_serial_debug_data(debug, &edge_port->port->dev, 2353 __func__, length, buffer); 2354 2355 /* Allocate our next urb */ 2356 urb = usb_alloc_urb(0, GFP_ATOMIC); 2357 if (!urb) 2358 return -ENOMEM; 2359 2360 atomic_inc(&CmdUrbs); 2361 dbg("%s - ALLOCATE URB %p (outstanding %d)", 2362 __func__, urb, atomic_read(&CmdUrbs)); 2363 2364 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2365 usb_sndbulkpipe(edge_serial->serial->dev, 2366 edge_serial->bulk_out_endpoint), 2367 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2368 2369 edge_port->commandPending = true; 2370 status = usb_submit_urb(urb, GFP_ATOMIC); 2371 2372 if (status) { 2373 /* something went wrong */ 2374 dev_err(&edge_port->port->dev, 2375 "%s - usb_submit_urb(write command) failed, status = %d\n", 2376 __func__, status); 2377 usb_kill_urb(urb); 2378 usb_free_urb(urb); 2379 atomic_dec(&CmdUrbs); 2380 return status; 2381 } 2382 2383 /* wait for command to finish */ 2384 timeout = COMMAND_TIMEOUT; 2385 #if 0 2386 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2387 2388 if (edge_port->commandPending) { 2389 /* command timed out */ 2390 dbg("%s - command timed out", __func__); 2391 status = -EINVAL; 2392 } 2393 #endif 2394 return status; 2395 } 2396 2397 2398 /***************************************************************************** 2399 * send_cmd_write_baud_rate 2400 * this function sends the proper command to change the baud rate of the 2401 * specified port. 2402 *****************************************************************************/ 2403 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2404 int baudRate) 2405 { 2406 struct edgeport_serial *edge_serial = 2407 usb_get_serial_data(edge_port->port->serial); 2408 unsigned char *cmdBuffer; 2409 unsigned char *currCmd; 2410 int cmdLen = 0; 2411 int divisor; 2412 int status; 2413 unsigned char number = 2414 edge_port->port->number - edge_port->port->serial->minor; 2415 2416 if (edge_serial->is_epic && 2417 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2418 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2419 edge_port->port->number, baudRate); 2420 return 0; 2421 } 2422 2423 dbg("%s - port = %d, baud = %d", __func__, 2424 edge_port->port->number, baudRate); 2425 2426 status = calc_baud_rate_divisor(baudRate, &divisor); 2427 if (status) { 2428 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", 2429 __func__); 2430 return status; 2431 } 2432 2433 /* Alloc memory for the string of commands. */ 2434 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2435 if (!cmdBuffer) { 2436 dev_err(&edge_port->port->dev, 2437 "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2438 return -ENOMEM; 2439 } 2440 currCmd = cmdBuffer; 2441 2442 /* Enable access to divisor latch */ 2443 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2444 2445 /* Write the divisor itself */ 2446 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2447 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2448 2449 /* Restore original value to disable access to divisor latch */ 2450 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2451 edge_port->shadowLCR); 2452 2453 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2454 if (status) { 2455 /* something bad happened, let's free up the memory */ 2456 kfree(cmdBuffer); 2457 } 2458 2459 return status; 2460 } 2461 2462 2463 /***************************************************************************** 2464 * calc_baud_rate_divisor 2465 * this function calculates the proper baud rate divisor for the specified 2466 * baud rate. 2467 *****************************************************************************/ 2468 static int calc_baud_rate_divisor(int baudrate, int *divisor) 2469 { 2470 int i; 2471 __u16 custom; 2472 2473 2474 dbg("%s - %d", __func__, baudrate); 2475 2476 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2477 if (divisor_table[i].BaudRate == baudrate) { 2478 *divisor = divisor_table[i].Divisor; 2479 return 0; 2480 } 2481 } 2482 2483 /* We have tried all of the standard baud rates 2484 * lets try to calculate the divisor for this baud rate 2485 * Make sure the baud rate is reasonable */ 2486 if (baudrate > 50 && baudrate < 230400) { 2487 /* get divisor */ 2488 custom = (__u16)((230400L + baudrate/2) / baudrate); 2489 2490 *divisor = custom; 2491 2492 dbg("%s - Baud %d = %d", __func__, baudrate, custom); 2493 return 0; 2494 } 2495 2496 return -1; 2497 } 2498 2499 2500 /***************************************************************************** 2501 * send_cmd_write_uart_register 2502 * this function builds up a uart register message and sends to the device. 2503 *****************************************************************************/ 2504 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2505 __u8 regNum, __u8 regValue) 2506 { 2507 struct edgeport_serial *edge_serial = 2508 usb_get_serial_data(edge_port->port->serial); 2509 unsigned char *cmdBuffer; 2510 unsigned char *currCmd; 2511 unsigned long cmdLen = 0; 2512 int status; 2513 2514 dbg("%s - write to %s register 0x%02x", 2515 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2516 2517 if (edge_serial->is_epic && 2518 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2519 regNum == MCR) { 2520 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2521 return 0; 2522 } 2523 2524 if (edge_serial->is_epic && 2525 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2526 regNum == LCR) { 2527 dbg("SendCmdWriteUartReg - Not writing to LCR Register"); 2528 return 0; 2529 } 2530 2531 /* Alloc memory for the string of commands. */ 2532 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2533 if (cmdBuffer == NULL) 2534 return -ENOMEM; 2535 2536 currCmd = cmdBuffer; 2537 2538 /* Build a cmd in the buffer to write the given register */ 2539 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, 2540 edge_port->port->number - edge_port->port->serial->minor, 2541 regNum, regValue); 2542 2543 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2544 if (status) { 2545 /* something bad happened, let's free up the memory */ 2546 kfree(cmdBuffer); 2547 } 2548 2549 return status; 2550 } 2551 2552 2553 /***************************************************************************** 2554 * change_port_settings 2555 * This routine is called to set the UART on the device to match the 2556 * specified new settings. 2557 *****************************************************************************/ 2558 2559 static void change_port_settings(struct tty_struct *tty, 2560 struct edgeport_port *edge_port, struct ktermios *old_termios) 2561 { 2562 struct edgeport_serial *edge_serial = 2563 usb_get_serial_data(edge_port->port->serial); 2564 int baud; 2565 unsigned cflag; 2566 __u8 mask = 0xff; 2567 __u8 lData; 2568 __u8 lParity; 2569 __u8 lStop; 2570 __u8 rxFlow; 2571 __u8 txFlow; 2572 int status; 2573 2574 dbg("%s - port %d", __func__, edge_port->port->number); 2575 2576 if (!edge_port->open && 2577 !edge_port->openPending) { 2578 dbg("%s - port not opened", __func__); 2579 return; 2580 } 2581 2582 cflag = tty->termios->c_cflag; 2583 2584 switch (cflag & CSIZE) { 2585 case CS5: 2586 lData = LCR_BITS_5; mask = 0x1f; 2587 dbg("%s - data bits = 5", __func__); 2588 break; 2589 case CS6: 2590 lData = LCR_BITS_6; mask = 0x3f; 2591 dbg("%s - data bits = 6", __func__); 2592 break; 2593 case CS7: 2594 lData = LCR_BITS_7; mask = 0x7f; 2595 dbg("%s - data bits = 7", __func__); 2596 break; 2597 default: 2598 case CS8: 2599 lData = LCR_BITS_8; 2600 dbg("%s - data bits = 8", __func__); 2601 break; 2602 } 2603 2604 lParity = LCR_PAR_NONE; 2605 if (cflag & PARENB) { 2606 if (cflag & CMSPAR) { 2607 if (cflag & PARODD) { 2608 lParity = LCR_PAR_MARK; 2609 dbg("%s - parity = mark", __func__); 2610 } else { 2611 lParity = LCR_PAR_SPACE; 2612 dbg("%s - parity = space", __func__); 2613 } 2614 } else if (cflag & PARODD) { 2615 lParity = LCR_PAR_ODD; 2616 dbg("%s - parity = odd", __func__); 2617 } else { 2618 lParity = LCR_PAR_EVEN; 2619 dbg("%s - parity = even", __func__); 2620 } 2621 } else { 2622 dbg("%s - parity = none", __func__); 2623 } 2624 2625 if (cflag & CSTOPB) { 2626 lStop = LCR_STOP_2; 2627 dbg("%s - stop bits = 2", __func__); 2628 } else { 2629 lStop = LCR_STOP_1; 2630 dbg("%s - stop bits = 1", __func__); 2631 } 2632 2633 /* figure out the flow control settings */ 2634 rxFlow = txFlow = 0x00; 2635 if (cflag & CRTSCTS) { 2636 rxFlow |= IOSP_RX_FLOW_RTS; 2637 txFlow |= IOSP_TX_FLOW_CTS; 2638 dbg("%s - RTS/CTS is enabled", __func__); 2639 } else { 2640 dbg("%s - RTS/CTS is disabled", __func__); 2641 } 2642 2643 /* if we are implementing XON/XOFF, set the start and stop character 2644 in the device */ 2645 if (I_IXOFF(tty) || I_IXON(tty)) { 2646 unsigned char stop_char = STOP_CHAR(tty); 2647 unsigned char start_char = START_CHAR(tty); 2648 2649 if ((!edge_serial->is_epic) || 2650 ((edge_serial->is_epic) && 2651 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2652 send_iosp_ext_cmd(edge_port, 2653 IOSP_CMD_SET_XON_CHAR, start_char); 2654 send_iosp_ext_cmd(edge_port, 2655 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2656 } 2657 2658 /* if we are implementing INBOUND XON/XOFF */ 2659 if (I_IXOFF(tty)) { 2660 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2661 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2662 __func__, start_char, stop_char); 2663 } else { 2664 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2665 } 2666 2667 /* if we are implementing OUTBOUND XON/XOFF */ 2668 if (I_IXON(tty)) { 2669 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2670 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2671 __func__, start_char, stop_char); 2672 } else { 2673 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2674 } 2675 } 2676 2677 /* Set flow control to the configured value */ 2678 if ((!edge_serial->is_epic) || 2679 ((edge_serial->is_epic) && 2680 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2681 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2682 if ((!edge_serial->is_epic) || 2683 ((edge_serial->is_epic) && 2684 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2685 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2686 2687 2688 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2689 edge_port->shadowLCR |= (lData | lParity | lStop); 2690 2691 edge_port->validDataMask = mask; 2692 2693 /* Send the updated LCR value to the EdgePort */ 2694 status = send_cmd_write_uart_register(edge_port, LCR, 2695 edge_port->shadowLCR); 2696 if (status != 0) 2697 return; 2698 2699 /* set up the MCR register and send it to the EdgePort */ 2700 edge_port->shadowMCR = MCR_MASTER_IE; 2701 if (cflag & CBAUD) 2702 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2703 2704 status = send_cmd_write_uart_register(edge_port, MCR, 2705 edge_port->shadowMCR); 2706 if (status != 0) 2707 return; 2708 2709 /* Determine divisor based on baud rate */ 2710 baud = tty_get_baud_rate(tty); 2711 if (!baud) { 2712 /* pick a default, any default... */ 2713 baud = 9600; 2714 } 2715 2716 dbg("%s - baud rate = %d", __func__, baud); 2717 status = send_cmd_write_baud_rate(edge_port, baud); 2718 if (status == -1) { 2719 /* Speed change was not possible - put back the old speed */ 2720 baud = tty_termios_baud_rate(old_termios); 2721 tty_encode_baud_rate(tty, baud, baud); 2722 } 2723 return; 2724 } 2725 2726 2727 /**************************************************************************** 2728 * unicode_to_ascii 2729 * Turns a string from Unicode into ASCII. 2730 * Doesn't do a good job with any characters that are outside the normal 2731 * ASCII range, but it's only for debugging... 2732 * NOTE: expects the unicode in LE format 2733 ****************************************************************************/ 2734 static void unicode_to_ascii(char *string, int buflen, 2735 __le16 *unicode, int unicode_size) 2736 { 2737 int i; 2738 2739 if (buflen <= 0) /* never happens, but... */ 2740 return; 2741 --buflen; /* space for nul */ 2742 2743 for (i = 0; i < unicode_size; i++) { 2744 if (i >= buflen) 2745 break; 2746 string[i] = (char)(le16_to_cpu(unicode[i])); 2747 } 2748 string[i] = 0x00; 2749 } 2750 2751 2752 /**************************************************************************** 2753 * get_manufacturing_desc 2754 * reads in the manufacturing descriptor and stores it into the serial 2755 * structure. 2756 ****************************************************************************/ 2757 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2758 { 2759 int response; 2760 2761 dbg("getting manufacturer descriptor"); 2762 2763 response = rom_read(edge_serial->serial, 2764 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2765 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2766 EDGE_MANUF_DESC_LEN, 2767 (__u8 *)(&edge_serial->manuf_descriptor)); 2768 2769 if (response < 1) 2770 dev_err(&edge_serial->serial->dev->dev, 2771 "error in getting manufacturer descriptor\n"); 2772 else { 2773 char string[30]; 2774 dbg("**Manufacturer Descriptor"); 2775 dbg(" RomSize: %dK", 2776 edge_serial->manuf_descriptor.RomSize); 2777 dbg(" RamSize: %dK", 2778 edge_serial->manuf_descriptor.RamSize); 2779 dbg(" CpuRev: %d", 2780 edge_serial->manuf_descriptor.CpuRev); 2781 dbg(" BoardRev: %d", 2782 edge_serial->manuf_descriptor.BoardRev); 2783 dbg(" NumPorts: %d", 2784 edge_serial->manuf_descriptor.NumPorts); 2785 dbg(" DescDate: %d/%d/%d", 2786 edge_serial->manuf_descriptor.DescDate[0], 2787 edge_serial->manuf_descriptor.DescDate[1], 2788 edge_serial->manuf_descriptor.DescDate[2]+1900); 2789 unicode_to_ascii(string, sizeof(string), 2790 edge_serial->manuf_descriptor.SerialNumber, 2791 edge_serial->manuf_descriptor.SerNumLength/2); 2792 dbg(" SerialNumber: %s", string); 2793 unicode_to_ascii(string, sizeof(string), 2794 edge_serial->manuf_descriptor.AssemblyNumber, 2795 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2796 dbg(" AssemblyNumber: %s", string); 2797 unicode_to_ascii(string, sizeof(string), 2798 edge_serial->manuf_descriptor.OemAssyNumber, 2799 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2800 dbg(" OemAssyNumber: %s", string); 2801 dbg(" UartType: %d", 2802 edge_serial->manuf_descriptor.UartType); 2803 dbg(" IonPid: %d", 2804 edge_serial->manuf_descriptor.IonPid); 2805 dbg(" IonConfig: %d", 2806 edge_serial->manuf_descriptor.IonConfig); 2807 } 2808 } 2809 2810 2811 /**************************************************************************** 2812 * get_boot_desc 2813 * reads in the bootloader descriptor and stores it into the serial 2814 * structure. 2815 ****************************************************************************/ 2816 static void get_boot_desc(struct edgeport_serial *edge_serial) 2817 { 2818 int response; 2819 2820 dbg("getting boot descriptor"); 2821 2822 response = rom_read(edge_serial->serial, 2823 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2824 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2825 EDGE_BOOT_DESC_LEN, 2826 (__u8 *)(&edge_serial->boot_descriptor)); 2827 2828 if (response < 1) 2829 dev_err(&edge_serial->serial->dev->dev, 2830 "error in getting boot descriptor\n"); 2831 else { 2832 dbg("**Boot Descriptor:"); 2833 dbg(" BootCodeLength: %d", 2834 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2835 dbg(" MajorVersion: %d", 2836 edge_serial->boot_descriptor.MajorVersion); 2837 dbg(" MinorVersion: %d", 2838 edge_serial->boot_descriptor.MinorVersion); 2839 dbg(" BuildNumber: %d", 2840 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2841 dbg(" Capabilities: 0x%x", 2842 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2843 dbg(" UConfig0: %d", 2844 edge_serial->boot_descriptor.UConfig0); 2845 dbg(" UConfig1: %d", 2846 edge_serial->boot_descriptor.UConfig1); 2847 } 2848 } 2849 2850 2851 /**************************************************************************** 2852 * load_application_firmware 2853 * This is called to load the application firmware to the device 2854 ****************************************************************************/ 2855 static void load_application_firmware(struct edgeport_serial *edge_serial) 2856 { 2857 const struct ihex_binrec *rec; 2858 const struct firmware *fw; 2859 const char *fw_name; 2860 const char *fw_info; 2861 int response; 2862 __u32 Operaddr; 2863 __u16 build; 2864 2865 switch (edge_serial->product_info.iDownloadFile) { 2866 case EDGE_DOWNLOAD_FILE_I930: 2867 fw_info = "downloading firmware version (930)"; 2868 fw_name = "edgeport/down.fw"; 2869 break; 2870 2871 case EDGE_DOWNLOAD_FILE_80251: 2872 fw_info = "downloading firmware version (80251)"; 2873 fw_name = "edgeport/down2.fw"; 2874 break; 2875 2876 case EDGE_DOWNLOAD_FILE_NONE: 2877 dbg("No download file specified, skipping download"); 2878 return; 2879 2880 default: 2881 return; 2882 } 2883 2884 response = request_ihex_firmware(&fw, fw_name, 2885 &edge_serial->serial->dev->dev); 2886 if (response) { 2887 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 2888 fw_name, response); 2889 return; 2890 } 2891 2892 rec = (const struct ihex_binrec *)fw->data; 2893 build = (rec->data[2] << 8) | rec->data[3]; 2894 2895 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build); 2896 2897 edge_serial->product_info.FirmwareMajorVersion = fw->data[0]; 2898 edge_serial->product_info.FirmwareMinorVersion = fw->data[1]; 2899 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2900 2901 for (rec = ihex_next_binrec(rec); rec; 2902 rec = ihex_next_binrec(rec)) { 2903 Operaddr = be32_to_cpu(rec->addr); 2904 response = sram_write(edge_serial->serial, 2905 Operaddr >> 16, 2906 Operaddr & 0xFFFF, 2907 be16_to_cpu(rec->len), 2908 &rec->data[0]); 2909 if (response < 0) { 2910 dev_err(&edge_serial->serial->dev->dev, 2911 "sram_write failed (%x, %x, %d)\n", 2912 Operaddr >> 16, Operaddr & 0xFFFF, 2913 be16_to_cpu(rec->len)); 2914 break; 2915 } 2916 } 2917 2918 dbg("sending exec_dl_code"); 2919 response = usb_control_msg (edge_serial->serial->dev, 2920 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2921 USB_REQUEST_ION_EXEC_DL_CODE, 2922 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2923 2924 release_firmware(fw); 2925 return; 2926 } 2927 2928 2929 /**************************************************************************** 2930 * edge_startup 2931 ****************************************************************************/ 2932 static int edge_startup(struct usb_serial *serial) 2933 { 2934 struct edgeport_serial *edge_serial; 2935 struct edgeport_port *edge_port; 2936 struct usb_device *dev; 2937 int i, j; 2938 int response; 2939 bool interrupt_in_found; 2940 bool bulk_in_found; 2941 bool bulk_out_found; 2942 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2943 EDGE_COMPATIBILITY_MASK1, 2944 EDGE_COMPATIBILITY_MASK2 }; 2945 2946 dev = serial->dev; 2947 2948 /* create our private serial structure */ 2949 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2950 if (edge_serial == NULL) { 2951 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2952 return -ENOMEM; 2953 } 2954 spin_lock_init(&edge_serial->es_lock); 2955 edge_serial->serial = serial; 2956 usb_set_serial_data(serial, edge_serial); 2957 2958 /* get the name for the device from the device */ 2959 i = usb_string(dev, dev->descriptor.iManufacturer, 2960 &edge_serial->name[0], MAX_NAME_LEN+1); 2961 if (i < 0) 2962 i = 0; 2963 edge_serial->name[i++] = ' '; 2964 usb_string(dev, dev->descriptor.iProduct, 2965 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2966 2967 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2968 2969 /* Read the epic descriptor */ 2970 if (get_epic_descriptor(edge_serial) <= 0) { 2971 /* memcpy descriptor to Supports structures */ 2972 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2973 sizeof(struct edge_compatibility_bits)); 2974 2975 /* get the manufacturing descriptor for this device */ 2976 get_manufacturing_desc(edge_serial); 2977 2978 /* get the boot descriptor */ 2979 get_boot_desc(edge_serial); 2980 2981 get_product_info(edge_serial); 2982 } 2983 2984 /* set the number of ports from the manufacturing description */ 2985 /* serial->num_ports = serial->product_info.NumPorts; */ 2986 if ((!edge_serial->is_epic) && 2987 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2988 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 2989 "vs. core thinking we have %d ports, email " 2990 "greg@kroah.com this information.\n", 2991 edge_serial->product_info.NumPorts, 2992 serial->num_ports); 2993 } 2994 2995 dbg("%s - time 1 %ld", __func__, jiffies); 2996 2997 /* If not an EPiC device */ 2998 if (!edge_serial->is_epic) { 2999 /* now load the application firmware into this device */ 3000 load_application_firmware(edge_serial); 3001 3002 dbg("%s - time 2 %ld", __func__, jiffies); 3003 3004 /* Check current Edgeport EEPROM and update if necessary */ 3005 update_edgeport_E2PROM(edge_serial); 3006 3007 dbg("%s - time 3 %ld", __func__, jiffies); 3008 3009 /* set the configuration to use #1 */ 3010 /* dbg("set_configuration 1"); */ 3011 /* usb_set_configuration (dev, 1); */ 3012 } 3013 dbg(" FirmwareMajorVersion %d.%d.%d", 3014 edge_serial->product_info.FirmwareMajorVersion, 3015 edge_serial->product_info.FirmwareMinorVersion, 3016 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 3017 3018 /* we set up the pointers to the endpoints in the edge_open function, 3019 * as the structures aren't created yet. */ 3020 3021 /* set up our port private structures */ 3022 for (i = 0; i < serial->num_ports; ++i) { 3023 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); 3024 if (edge_port == NULL) { 3025 dev_err(&serial->dev->dev, "%s - Out of memory\n", 3026 __func__); 3027 for (j = 0; j < i; ++j) { 3028 kfree(usb_get_serial_port_data(serial->port[j])); 3029 usb_set_serial_port_data(serial->port[j], 3030 NULL); 3031 } 3032 usb_set_serial_data(serial, NULL); 3033 kfree(edge_serial); 3034 return -ENOMEM; 3035 } 3036 spin_lock_init(&edge_port->ep_lock); 3037 edge_port->port = serial->port[i]; 3038 usb_set_serial_port_data(serial->port[i], edge_port); 3039 } 3040 3041 response = 0; 3042 3043 if (edge_serial->is_epic) { 3044 /* EPIC thing, set up our interrupt polling now and our read 3045 * urb, so that the device knows it really is connected. */ 3046 interrupt_in_found = bulk_in_found = bulk_out_found = false; 3047 for (i = 0; i < serial->interface->altsetting[0] 3048 .desc.bNumEndpoints; ++i) { 3049 struct usb_endpoint_descriptor *endpoint; 3050 int buffer_size; 3051 3052 endpoint = &serial->interface->altsetting[0]. 3053 endpoint[i].desc; 3054 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 3055 if (!interrupt_in_found && 3056 (usb_endpoint_is_int_in(endpoint))) { 3057 /* we found a interrupt in endpoint */ 3058 dbg("found interrupt in"); 3059 3060 /* not set up yet, so do it now */ 3061 edge_serial->interrupt_read_urb = 3062 usb_alloc_urb(0, GFP_KERNEL); 3063 if (!edge_serial->interrupt_read_urb) { 3064 dev_err(&dev->dev, "out of memory\n"); 3065 return -ENOMEM; 3066 } 3067 edge_serial->interrupt_in_buffer = 3068 kmalloc(buffer_size, GFP_KERNEL); 3069 if (!edge_serial->interrupt_in_buffer) { 3070 dev_err(&dev->dev, "out of memory\n"); 3071 usb_free_urb(edge_serial->interrupt_read_urb); 3072 return -ENOMEM; 3073 } 3074 edge_serial->interrupt_in_endpoint = 3075 endpoint->bEndpointAddress; 3076 3077 /* set up our interrupt urb */ 3078 usb_fill_int_urb( 3079 edge_serial->interrupt_read_urb, 3080 dev, 3081 usb_rcvintpipe(dev, 3082 endpoint->bEndpointAddress), 3083 edge_serial->interrupt_in_buffer, 3084 buffer_size, 3085 edge_interrupt_callback, 3086 edge_serial, 3087 endpoint->bInterval); 3088 3089 interrupt_in_found = true; 3090 } 3091 3092 if (!bulk_in_found && 3093 (usb_endpoint_is_bulk_in(endpoint))) { 3094 /* we found a bulk in endpoint */ 3095 dbg("found bulk in"); 3096 3097 /* not set up yet, so do it now */ 3098 edge_serial->read_urb = 3099 usb_alloc_urb(0, GFP_KERNEL); 3100 if (!edge_serial->read_urb) { 3101 dev_err(&dev->dev, "out of memory\n"); 3102 return -ENOMEM; 3103 } 3104 edge_serial->bulk_in_buffer = 3105 kmalloc(buffer_size, GFP_KERNEL); 3106 if (!edge_serial->bulk_in_buffer) { 3107 dev_err(&dev->dev, "out of memory\n"); 3108 usb_free_urb(edge_serial->read_urb); 3109 return -ENOMEM; 3110 } 3111 edge_serial->bulk_in_endpoint = 3112 endpoint->bEndpointAddress; 3113 3114 /* set up our bulk in urb */ 3115 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3116 usb_rcvbulkpipe(dev, 3117 endpoint->bEndpointAddress), 3118 edge_serial->bulk_in_buffer, 3119 le16_to_cpu(endpoint->wMaxPacketSize), 3120 edge_bulk_in_callback, 3121 edge_serial); 3122 bulk_in_found = true; 3123 } 3124 3125 if (!bulk_out_found && 3126 (usb_endpoint_is_bulk_out(endpoint))) { 3127 /* we found a bulk out endpoint */ 3128 dbg("found bulk out"); 3129 edge_serial->bulk_out_endpoint = 3130 endpoint->bEndpointAddress; 3131 bulk_out_found = true; 3132 } 3133 } 3134 3135 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3136 dev_err(&dev->dev, "Error - the proper endpoints " 3137 "were not found!\n"); 3138 return -ENODEV; 3139 } 3140 3141 /* start interrupt read for this edgeport this interrupt will 3142 * continue as long as the edgeport is connected */ 3143 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3144 GFP_KERNEL); 3145 if (response) 3146 dev_err(&dev->dev, 3147 "%s - Error %d submitting control urb\n", 3148 __func__, response); 3149 } 3150 return response; 3151 } 3152 3153 3154 /**************************************************************************** 3155 * edge_disconnect 3156 * This function is called whenever the device is removed from the usb bus. 3157 ****************************************************************************/ 3158 static void edge_disconnect(struct usb_serial *serial) 3159 { 3160 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3161 3162 dbg("%s", __func__); 3163 3164 /* stop reads and writes on all ports */ 3165 /* free up our endpoint stuff */ 3166 if (edge_serial->is_epic) { 3167 usb_kill_urb(edge_serial->interrupt_read_urb); 3168 usb_free_urb(edge_serial->interrupt_read_urb); 3169 kfree(edge_serial->interrupt_in_buffer); 3170 3171 usb_kill_urb(edge_serial->read_urb); 3172 usb_free_urb(edge_serial->read_urb); 3173 kfree(edge_serial->bulk_in_buffer); 3174 } 3175 } 3176 3177 3178 /**************************************************************************** 3179 * edge_release 3180 * This function is called when the device structure is deallocated. 3181 ****************************************************************************/ 3182 static void edge_release(struct usb_serial *serial) 3183 { 3184 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3185 int i; 3186 3187 dbg("%s", __func__); 3188 3189 for (i = 0; i < serial->num_ports; ++i) 3190 kfree(usb_get_serial_port_data(serial->port[i])); 3191 3192 kfree(edge_serial); 3193 } 3194 3195 3196 /**************************************************************************** 3197 * edgeport_init 3198 * This is called by the module subsystem, or on startup to initialize us 3199 ****************************************************************************/ 3200 static int __init edgeport_init(void) 3201 { 3202 int retval; 3203 3204 retval = usb_serial_register(&edgeport_2port_device); 3205 if (retval) 3206 goto failed_2port_device_register; 3207 retval = usb_serial_register(&edgeport_4port_device); 3208 if (retval) 3209 goto failed_4port_device_register; 3210 retval = usb_serial_register(&edgeport_8port_device); 3211 if (retval) 3212 goto failed_8port_device_register; 3213 retval = usb_serial_register(&epic_device); 3214 if (retval) 3215 goto failed_epic_device_register; 3216 retval = usb_register(&io_driver); 3217 if (retval) 3218 goto failed_usb_register; 3219 atomic_set(&CmdUrbs, 0); 3220 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 3221 DRIVER_DESC "\n"); 3222 return 0; 3223 3224 failed_usb_register: 3225 usb_serial_deregister(&epic_device); 3226 failed_epic_device_register: 3227 usb_serial_deregister(&edgeport_8port_device); 3228 failed_8port_device_register: 3229 usb_serial_deregister(&edgeport_4port_device); 3230 failed_4port_device_register: 3231 usb_serial_deregister(&edgeport_2port_device); 3232 failed_2port_device_register: 3233 return retval; 3234 } 3235 3236 3237 /**************************************************************************** 3238 * edgeport_exit 3239 * Called when the driver is about to be unloaded. 3240 ****************************************************************************/ 3241 static void __exit edgeport_exit (void) 3242 { 3243 usb_deregister(&io_driver); 3244 usb_serial_deregister(&edgeport_2port_device); 3245 usb_serial_deregister(&edgeport_4port_device); 3246 usb_serial_deregister(&edgeport_8port_device); 3247 usb_serial_deregister(&epic_device); 3248 } 3249 3250 module_init(edgeport_init); 3251 module_exit(edgeport_exit); 3252 3253 /* Module information */ 3254 MODULE_AUTHOR(DRIVER_AUTHOR); 3255 MODULE_DESCRIPTION(DRIVER_DESC); 3256 MODULE_LICENSE("GPL"); 3257 MODULE_FIRMWARE("edgeport/boot.fw"); 3258 MODULE_FIRMWARE("edgeport/boot2.fw"); 3259 MODULE_FIRMWARE("edgeport/down.fw"); 3260 MODULE_FIRMWARE("edgeport/down2.fw"); 3261 3262 module_param(debug, bool, S_IRUGO | S_IWUSR); 3263 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3264