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