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