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 usb_serial_port *port); 211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 212 const unsigned char *buf, int count); 213 static int edge_write_room(struct tty_struct *tty); 214 static int edge_chars_in_buffer(struct tty_struct *tty); 215 static void edge_throttle(struct tty_struct *tty); 216 static void edge_unthrottle(struct tty_struct *tty); 217 static void edge_set_termios(struct tty_struct *tty, 218 struct usb_serial_port *port, 219 struct ktermios *old_termios); 220 static int edge_ioctl(struct tty_struct *tty, struct file *file, 221 unsigned int cmd, unsigned long arg); 222 static void edge_break(struct tty_struct *tty, int break_state); 223 static int edge_tiocmget(struct tty_struct *tty, struct file *file); 224 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 225 unsigned int set, unsigned int clear); 226 static int edge_startup(struct usb_serial *serial); 227 static void edge_disconnect(struct usb_serial *serial); 228 static void edge_release(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(port); 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(port); 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 usb_serial_port *port) 1103 { 1104 struct edgeport_serial *edge_serial; 1105 struct edgeport_port *edge_port; 1106 int status; 1107 1108 dbg("%s - port %d", __func__, port->number); 1109 1110 edge_serial = usb_get_serial_data(port->serial); 1111 edge_port = usb_get_serial_port_data(port); 1112 if (edge_serial == NULL || edge_port == NULL) 1113 return; 1114 1115 /* block until tx is empty */ 1116 block_until_tx_empty(edge_port); 1117 1118 edge_port->closePending = true; 1119 1120 if ((!edge_serial->is_epic) || 1121 ((edge_serial->is_epic) && 1122 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1123 /* flush and chase */ 1124 edge_port->chaseResponsePending = true; 1125 1126 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1127 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1128 if (status == 0) 1129 /* block until chase finished */ 1130 block_until_chase_response(edge_port); 1131 else 1132 edge_port->chaseResponsePending = false; 1133 } 1134 1135 if ((!edge_serial->is_epic) || 1136 ((edge_serial->is_epic) && 1137 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1138 /* close the port */ 1139 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__); 1140 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1141 } 1142 1143 /* port->close = true; */ 1144 edge_port->closePending = false; 1145 edge_port->open = false; 1146 edge_port->openPending = false; 1147 1148 usb_kill_urb(edge_port->write_urb); 1149 1150 if (edge_port->write_urb) { 1151 /* if this urb had a transfer buffer already 1152 (old transfer) free it */ 1153 kfree(edge_port->write_urb->transfer_buffer); 1154 usb_free_urb(edge_port->write_urb); 1155 edge_port->write_urb = NULL; 1156 } 1157 kfree(edge_port->txfifo.fifo); 1158 edge_port->txfifo.fifo = NULL; 1159 1160 dbg("%s exited", __func__); 1161 } 1162 1163 /***************************************************************************** 1164 * SerialWrite 1165 * this function is called by the tty driver when data should be written 1166 * to the port. 1167 * If successful, we return the number of bytes written, otherwise we 1168 * return a negative error number. 1169 *****************************************************************************/ 1170 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1171 const unsigned char *data, int count) 1172 { 1173 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1174 struct TxFifo *fifo; 1175 int copySize; 1176 int bytesleft; 1177 int firsthalf; 1178 int secondhalf; 1179 unsigned long flags; 1180 1181 dbg("%s - port %d", __func__, port->number); 1182 1183 if (edge_port == NULL) 1184 return -ENODEV; 1185 1186 /* get a pointer to the Tx fifo */ 1187 fifo = &edge_port->txfifo; 1188 1189 spin_lock_irqsave(&edge_port->ep_lock, flags); 1190 1191 /* calculate number of bytes to put in fifo */ 1192 copySize = min((unsigned int)count, 1193 (edge_port->txCredits - fifo->count)); 1194 1195 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", 1196 __func__, port->number, count, 1197 edge_port->txCredits - fifo->count, copySize); 1198 1199 /* catch writes of 0 bytes which the tty driver likes to give us, 1200 and when txCredits is empty */ 1201 if (copySize == 0) { 1202 dbg("%s - copySize = Zero", __func__); 1203 goto finish_write; 1204 } 1205 1206 /* queue the data 1207 * since we can never overflow the buffer we do not have to check for a 1208 * full condition 1209 * 1210 * the copy is done is two parts -- first fill to the end of the buffer 1211 * then copy the reset from the start of the buffer 1212 */ 1213 bytesleft = fifo->size - fifo->head; 1214 firsthalf = min(bytesleft, copySize); 1215 dbg("%s - copy %d bytes of %d into fifo ", __func__, 1216 firsthalf, bytesleft); 1217 1218 /* now copy our data */ 1219 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1220 usb_serial_debug_data(debug, &port->dev, __func__, 1221 firsthalf, &fifo->fifo[fifo->head]); 1222 1223 /* update the index and size */ 1224 fifo->head += firsthalf; 1225 fifo->count += firsthalf; 1226 1227 /* wrap the index */ 1228 if (fifo->head == fifo->size) 1229 fifo->head = 0; 1230 1231 secondhalf = copySize-firsthalf; 1232 1233 if (secondhalf) { 1234 dbg("%s - copy rest of data %d", __func__, secondhalf); 1235 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1236 usb_serial_debug_data(debug, &port->dev, __func__, 1237 secondhalf, &fifo->fifo[fifo->head]); 1238 /* update the index and size */ 1239 fifo->count += secondhalf; 1240 fifo->head += secondhalf; 1241 /* No need to check for wrap since we can not get to end of 1242 * the fifo in this part 1243 */ 1244 } 1245 1246 finish_write: 1247 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1248 1249 send_more_port_data((struct edgeport_serial *) 1250 usb_get_serial_data(port->serial), edge_port); 1251 1252 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__, 1253 copySize, edge_port->txCredits, fifo->count); 1254 1255 return copySize; 1256 } 1257 1258 1259 /************************************************************************ 1260 * 1261 * send_more_port_data() 1262 * 1263 * This routine attempts to write additional UART transmit data 1264 * to a port over the USB bulk pipe. It is called (1) when new 1265 * data has been written to a port's TxBuffer from higher layers 1266 * (2) when the peripheral sends us additional TxCredits indicating 1267 * that it can accept more Tx data for a given port; and (3) when 1268 * a bulk write completes successfully and we want to see if we 1269 * can transmit more. 1270 * 1271 ************************************************************************/ 1272 static void send_more_port_data(struct edgeport_serial *edge_serial, 1273 struct edgeport_port *edge_port) 1274 { 1275 struct TxFifo *fifo = &edge_port->txfifo; 1276 struct urb *urb; 1277 unsigned char *buffer; 1278 int status; 1279 int count; 1280 int bytesleft; 1281 int firsthalf; 1282 int secondhalf; 1283 unsigned long flags; 1284 1285 dbg("%s(%d)", __func__, edge_port->port->number); 1286 1287 spin_lock_irqsave(&edge_port->ep_lock, flags); 1288 1289 if (edge_port->write_in_progress || 1290 !edge_port->open || 1291 (fifo->count == 0)) { 1292 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", 1293 __func__, edge_port->port->number, 1294 fifo->count, edge_port->write_in_progress); 1295 goto exit_send; 1296 } 1297 1298 /* since the amount of data in the fifo will always fit into the 1299 * edgeport buffer we do not need to check the write length 1300 * 1301 * Do we have enough credits for this port to make it worthwhile 1302 * to bother queueing a write. If it's too small, say a few bytes, 1303 * it's better to wait for more credits so we can do a larger write. 1304 */ 1305 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1306 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", 1307 __func__, edge_port->port->number, fifo->count, 1308 edge_port->txCredits); 1309 goto exit_send; 1310 } 1311 1312 /* lock this write */ 1313 edge_port->write_in_progress = true; 1314 1315 /* get a pointer to the write_urb */ 1316 urb = edge_port->write_urb; 1317 1318 /* make sure transfer buffer is freed */ 1319 kfree(urb->transfer_buffer); 1320 urb->transfer_buffer = NULL; 1321 1322 /* build the data header for the buffer and port that we are about 1323 to send out */ 1324 count = fifo->count; 1325 buffer = kmalloc(count+2, GFP_ATOMIC); 1326 if (buffer == NULL) { 1327 dev_err(&edge_port->port->dev, 1328 "%s - no more kernel memory...\n", __func__); 1329 edge_port->write_in_progress = false; 1330 goto exit_send; 1331 } 1332 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number 1333 - edge_port->port->serial->minor, count); 1334 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number 1335 - edge_port->port->serial->minor, count); 1336 1337 /* now copy our data */ 1338 bytesleft = fifo->size - fifo->tail; 1339 firsthalf = min(bytesleft, count); 1340 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1341 fifo->tail += firsthalf; 1342 fifo->count -= firsthalf; 1343 if (fifo->tail == fifo->size) 1344 fifo->tail = 0; 1345 1346 secondhalf = count-firsthalf; 1347 if (secondhalf) { 1348 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1349 secondhalf); 1350 fifo->tail += secondhalf; 1351 fifo->count -= secondhalf; 1352 } 1353 1354 if (count) 1355 usb_serial_debug_data(debug, &edge_port->port->dev, 1356 __func__, count, &buffer[2]); 1357 1358 /* fill up the urb with all of our data and submit it */ 1359 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1360 usb_sndbulkpipe(edge_serial->serial->dev, 1361 edge_serial->bulk_out_endpoint), 1362 buffer, count+2, 1363 edge_bulk_out_data_callback, edge_port); 1364 1365 /* decrement the number of credits we have by the number we just sent */ 1366 edge_port->txCredits -= count; 1367 edge_port->icount.tx += count; 1368 1369 urb->dev = edge_serial->serial->dev; 1370 status = usb_submit_urb(urb, GFP_ATOMIC); 1371 if (status) { 1372 /* something went wrong */ 1373 dev_err(&edge_port->port->dev, 1374 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1375 __func__, status); 1376 edge_port->write_in_progress = false; 1377 1378 /* revert the credits as something bad happened. */ 1379 edge_port->txCredits += count; 1380 edge_port->icount.tx -= count; 1381 } 1382 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", 1383 __func__, count, edge_port->txCredits, fifo->count); 1384 1385 exit_send: 1386 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1387 } 1388 1389 1390 /***************************************************************************** 1391 * edge_write_room 1392 * this function is called by the tty driver when it wants to know how 1393 * many bytes of data we can accept for a specific port. If successful, 1394 * we return the amount of room that we have for this port (the txCredits) 1395 * otherwise we return a negative error number. 1396 *****************************************************************************/ 1397 static int edge_write_room(struct tty_struct *tty) 1398 { 1399 struct usb_serial_port *port = tty->driver_data; 1400 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1401 int room; 1402 unsigned long flags; 1403 1404 dbg("%s", __func__); 1405 1406 if (edge_port == NULL) 1407 return 0; 1408 if (edge_port->closePending) 1409 return 0; 1410 1411 dbg("%s - port %d", __func__, port->number); 1412 1413 if (!edge_port->open) { 1414 dbg("%s - port not opened", __func__); 1415 return 0; 1416 } 1417 1418 /* total of both buffers is still txCredit */ 1419 spin_lock_irqsave(&edge_port->ep_lock, flags); 1420 room = edge_port->txCredits - edge_port->txfifo.count; 1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1422 1423 dbg("%s - returns %d", __func__, room); 1424 return room; 1425 } 1426 1427 1428 /***************************************************************************** 1429 * edge_chars_in_buffer 1430 * this function is called by the tty driver when it wants to know how 1431 * many bytes of data we currently have outstanding in the port (data that 1432 * has been written, but hasn't made it out the port yet) 1433 * If successful, we return the number of bytes left to be written in the 1434 * system, 1435 * Otherwise we return a negative error number. 1436 *****************************************************************************/ 1437 static int edge_chars_in_buffer(struct tty_struct *tty) 1438 { 1439 struct usb_serial_port *port = tty->driver_data; 1440 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1441 int num_chars; 1442 unsigned long flags; 1443 1444 dbg("%s", __func__); 1445 1446 if (edge_port == NULL) 1447 return 0; 1448 if (edge_port->closePending) 1449 return 0; 1450 1451 if (!edge_port->open) { 1452 dbg("%s - port not opened", __func__); 1453 return 0; 1454 } 1455 1456 spin_lock_irqsave(&edge_port->ep_lock, flags); 1457 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1458 edge_port->txfifo.count; 1459 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1460 if (num_chars) { 1461 dbg("%s(port %d) - returns %d", __func__, 1462 port->number, num_chars); 1463 } 1464 1465 return num_chars; 1466 } 1467 1468 1469 /***************************************************************************** 1470 * SerialThrottle 1471 * this function is called by the tty driver when it wants to stop the data 1472 * being read from the port. 1473 *****************************************************************************/ 1474 static void edge_throttle(struct tty_struct *tty) 1475 { 1476 struct usb_serial_port *port = tty->driver_data; 1477 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1478 int status; 1479 1480 dbg("%s - port %d", __func__, port->number); 1481 1482 if (edge_port == NULL) 1483 return; 1484 1485 if (!edge_port->open) { 1486 dbg("%s - port not opened", __func__); 1487 return; 1488 } 1489 1490 /* if we are implementing XON/XOFF, send the stop character */ 1491 if (I_IXOFF(tty)) { 1492 unsigned char stop_char = STOP_CHAR(tty); 1493 status = edge_write(tty, port, &stop_char, 1); 1494 if (status <= 0) 1495 return; 1496 } 1497 1498 /* if we are implementing RTS/CTS, toggle that line */ 1499 if (tty->termios->c_cflag & CRTSCTS) { 1500 edge_port->shadowMCR &= ~MCR_RTS; 1501 status = send_cmd_write_uart_register(edge_port, MCR, 1502 edge_port->shadowMCR); 1503 if (status != 0) 1504 return; 1505 } 1506 1507 return; 1508 } 1509 1510 1511 /***************************************************************************** 1512 * edge_unthrottle 1513 * this function is called by the tty driver when it wants to resume the 1514 * data being read from the port (called after SerialThrottle is called) 1515 *****************************************************************************/ 1516 static void edge_unthrottle(struct tty_struct *tty) 1517 { 1518 struct usb_serial_port *port = tty->driver_data; 1519 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1520 int status; 1521 1522 dbg("%s - port %d", __func__, port->number); 1523 1524 if (edge_port == NULL) 1525 return; 1526 1527 if (!edge_port->open) { 1528 dbg("%s - port not opened", __func__); 1529 return; 1530 } 1531 1532 /* if we are implementing XON/XOFF, send the start character */ 1533 if (I_IXOFF(tty)) { 1534 unsigned char start_char = START_CHAR(tty); 1535 status = edge_write(tty, port, &start_char, 1); 1536 if (status <= 0) 1537 return; 1538 } 1539 /* if we are implementing RTS/CTS, toggle that line */ 1540 if (tty->termios->c_cflag & CRTSCTS) { 1541 edge_port->shadowMCR |= MCR_RTS; 1542 send_cmd_write_uart_register(edge_port, MCR, 1543 edge_port->shadowMCR); 1544 } 1545 } 1546 1547 1548 /***************************************************************************** 1549 * SerialSetTermios 1550 * this function is called by the tty driver when it wants to change 1551 * the termios structure 1552 *****************************************************************************/ 1553 static void edge_set_termios(struct tty_struct *tty, 1554 struct usb_serial_port *port, struct ktermios *old_termios) 1555 { 1556 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1557 unsigned int cflag; 1558 1559 cflag = tty->termios->c_cflag; 1560 dbg("%s - clfag %08x iflag %08x", __func__, 1561 tty->termios->c_cflag, tty->termios->c_iflag); 1562 dbg("%s - old clfag %08x old iflag %08x", __func__, 1563 old_termios->c_cflag, old_termios->c_iflag); 1564 1565 dbg("%s - port %d", __func__, port->number); 1566 1567 if (edge_port == NULL) 1568 return; 1569 1570 if (!edge_port->open) { 1571 dbg("%s - port not opened", __func__); 1572 return; 1573 } 1574 1575 /* change the port settings to the new ones specified */ 1576 change_port_settings(tty, edge_port, old_termios); 1577 } 1578 1579 1580 /***************************************************************************** 1581 * get_lsr_info - get line status register info 1582 * 1583 * Purpose: Let user call ioctl() to get info when the UART physically 1584 * is emptied. On bus types like RS485, the transmitter must 1585 * release the bus after transmitting. This must be done when 1586 * the transmit shift register is empty, not be done when the 1587 * transmit holding register is empty. This functionality 1588 * allows an RS485 driver to be written in user space. 1589 *****************************************************************************/ 1590 static int get_lsr_info(struct edgeport_port *edge_port, 1591 unsigned int __user *value) 1592 { 1593 unsigned int result = 0; 1594 unsigned long flags; 1595 1596 spin_lock_irqsave(&edge_port->ep_lock, flags); 1597 if (edge_port->maxTxCredits == edge_port->txCredits && 1598 edge_port->txfifo.count == 0) { 1599 dbg("%s -- Empty", __func__); 1600 result = TIOCSER_TEMT; 1601 } 1602 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1603 1604 if (copy_to_user(value, &result, sizeof(int))) 1605 return -EFAULT; 1606 return 0; 1607 } 1608 1609 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 1610 unsigned int set, unsigned int clear) 1611 { 1612 struct usb_serial_port *port = tty->driver_data; 1613 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1614 unsigned int mcr; 1615 1616 dbg("%s - port %d", __func__, port->number); 1617 1618 mcr = edge_port->shadowMCR; 1619 if (set & TIOCM_RTS) 1620 mcr |= MCR_RTS; 1621 if (set & TIOCM_DTR) 1622 mcr |= MCR_DTR; 1623 if (set & TIOCM_LOOP) 1624 mcr |= MCR_LOOPBACK; 1625 1626 if (clear & TIOCM_RTS) 1627 mcr &= ~MCR_RTS; 1628 if (clear & TIOCM_DTR) 1629 mcr &= ~MCR_DTR; 1630 if (clear & TIOCM_LOOP) 1631 mcr &= ~MCR_LOOPBACK; 1632 1633 edge_port->shadowMCR = mcr; 1634 1635 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1636 1637 return 0; 1638 } 1639 1640 static int edge_tiocmget(struct tty_struct *tty, struct file *file) 1641 { 1642 struct usb_serial_port *port = tty->driver_data; 1643 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1644 unsigned int result = 0; 1645 unsigned int msr; 1646 unsigned int mcr; 1647 1648 dbg("%s - port %d", __func__, port->number); 1649 1650 msr = edge_port->shadowMSR; 1651 mcr = edge_port->shadowMCR; 1652 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1653 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1654 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1655 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1656 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1657 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1658 1659 1660 dbg("%s -- %x", __func__, result); 1661 1662 return result; 1663 } 1664 1665 static int get_serial_info(struct edgeport_port *edge_port, 1666 struct serial_struct __user *retinfo) 1667 { 1668 struct serial_struct tmp; 1669 1670 if (!retinfo) 1671 return -EFAULT; 1672 1673 memset(&tmp, 0, sizeof(tmp)); 1674 1675 tmp.type = PORT_16550A; 1676 tmp.line = edge_port->port->serial->minor; 1677 tmp.port = edge_port->port->number; 1678 tmp.irq = 0; 1679 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1680 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1681 tmp.baud_base = 9600; 1682 tmp.close_delay = 5*HZ; 1683 tmp.closing_wait = 30*HZ; 1684 1685 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1686 return -EFAULT; 1687 return 0; 1688 } 1689 1690 1691 1692 /***************************************************************************** 1693 * SerialIoctl 1694 * this function handles any ioctl calls to the driver 1695 *****************************************************************************/ 1696 static int edge_ioctl(struct tty_struct *tty, struct file *file, 1697 unsigned int cmd, unsigned long arg) 1698 { 1699 struct usb_serial_port *port = tty->driver_data; 1700 DEFINE_WAIT(wait); 1701 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1702 struct async_icount cnow; 1703 struct async_icount cprev; 1704 struct serial_icounter_struct icount; 1705 1706 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 1707 1708 switch (cmd) { 1709 case TIOCSERGETLSR: 1710 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 1711 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1712 1713 case TIOCGSERIAL: 1714 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 1715 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1716 1717 case TIOCMIWAIT: 1718 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 1719 cprev = edge_port->icount; 1720 while (1) { 1721 prepare_to_wait(&edge_port->delta_msr_wait, 1722 &wait, TASK_INTERRUPTIBLE); 1723 schedule(); 1724 finish_wait(&edge_port->delta_msr_wait, &wait); 1725 /* see if a signal did it */ 1726 if (signal_pending(current)) 1727 return -ERESTARTSYS; 1728 cnow = edge_port->icount; 1729 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1730 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1731 return -EIO; /* no change => error */ 1732 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1733 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1734 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1735 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 1736 return 0; 1737 } 1738 cprev = cnow; 1739 } 1740 /* NOTREACHED */ 1741 break; 1742 1743 case TIOCGICOUNT: 1744 cnow = edge_port->icount; 1745 memset(&icount, 0, sizeof(icount)); 1746 icount.cts = cnow.cts; 1747 icount.dsr = cnow.dsr; 1748 icount.rng = cnow.rng; 1749 icount.dcd = cnow.dcd; 1750 icount.rx = cnow.rx; 1751 icount.tx = cnow.tx; 1752 icount.frame = cnow.frame; 1753 icount.overrun = cnow.overrun; 1754 icount.parity = cnow.parity; 1755 icount.brk = cnow.brk; 1756 icount.buf_overrun = cnow.buf_overrun; 1757 1758 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", 1759 __func__, port->number, icount.rx, icount.tx); 1760 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1761 return -EFAULT; 1762 return 0; 1763 } 1764 return -ENOIOCTLCMD; 1765 } 1766 1767 1768 /***************************************************************************** 1769 * SerialBreak 1770 * this function sends a break to the port 1771 *****************************************************************************/ 1772 static void edge_break(struct tty_struct *tty, int break_state) 1773 { 1774 struct usb_serial_port *port = tty->driver_data; 1775 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1776 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1777 int status; 1778 1779 if ((!edge_serial->is_epic) || 1780 ((edge_serial->is_epic) && 1781 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1782 /* flush and chase */ 1783 edge_port->chaseResponsePending = true; 1784 1785 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1786 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1787 if (status == 0) { 1788 /* block until chase finished */ 1789 block_until_chase_response(edge_port); 1790 } else { 1791 edge_port->chaseResponsePending = false; 1792 } 1793 } 1794 1795 if ((!edge_serial->is_epic) || 1796 ((edge_serial->is_epic) && 1797 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1798 if (break_state == -1) { 1799 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__); 1800 status = send_iosp_ext_cmd(edge_port, 1801 IOSP_CMD_SET_BREAK, 0); 1802 } else { 1803 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__); 1804 status = send_iosp_ext_cmd(edge_port, 1805 IOSP_CMD_CLEAR_BREAK, 0); 1806 } 1807 if (status) 1808 dbg("%s - error sending break set/clear command.", 1809 __func__); 1810 } 1811 1812 return; 1813 } 1814 1815 1816 /***************************************************************************** 1817 * process_rcvd_data 1818 * this function handles the data received on the bulk in pipe. 1819 *****************************************************************************/ 1820 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1821 unsigned char *buffer, __u16 bufferLength) 1822 { 1823 struct usb_serial_port *port; 1824 struct edgeport_port *edge_port; 1825 struct tty_struct *tty; 1826 __u16 lastBufferLength; 1827 __u16 rxLen; 1828 1829 dbg("%s", __func__); 1830 1831 lastBufferLength = bufferLength + 1; 1832 1833 while (bufferLength > 0) { 1834 /* failsafe incase we get a message that we don't understand */ 1835 if (lastBufferLength == bufferLength) { 1836 dbg("%s - stuck in loop, exiting it.", __func__); 1837 break; 1838 } 1839 lastBufferLength = bufferLength; 1840 1841 switch (edge_serial->rxState) { 1842 case EXPECT_HDR1: 1843 edge_serial->rxHeader1 = *buffer; 1844 ++buffer; 1845 --bufferLength; 1846 1847 if (bufferLength == 0) { 1848 edge_serial->rxState = EXPECT_HDR2; 1849 break; 1850 } 1851 /* otherwise, drop on through */ 1852 case EXPECT_HDR2: 1853 edge_serial->rxHeader2 = *buffer; 1854 ++buffer; 1855 --bufferLength; 1856 1857 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, 1858 edge_serial->rxHeader1, edge_serial->rxHeader2); 1859 /* Process depending on whether this header is 1860 * data or status */ 1861 1862 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1863 /* Decode this status header and go to 1864 * EXPECT_HDR1 (if we can process the status 1865 * with only 2 bytes), or go to EXPECT_HDR3 to 1866 * get the third byte. */ 1867 edge_serial->rxPort = 1868 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1869 edge_serial->rxStatusCode = 1870 IOSP_GET_STATUS_CODE( 1871 edge_serial->rxHeader1); 1872 1873 if (!IOSP_STATUS_IS_2BYTE( 1874 edge_serial->rxStatusCode)) { 1875 /* This status needs additional bytes. 1876 * Save what we have and then wait for 1877 * more data. 1878 */ 1879 edge_serial->rxStatusParam 1880 = edge_serial->rxHeader2; 1881 edge_serial->rxState = EXPECT_HDR3; 1882 break; 1883 } 1884 /* We have all the header bytes, process the 1885 status now */ 1886 process_rcvd_status(edge_serial, 1887 edge_serial->rxHeader2, 0); 1888 edge_serial->rxState = EXPECT_HDR1; 1889 break; 1890 } else { 1891 edge_serial->rxPort = 1892 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1893 edge_serial->rxBytesRemaining = 1894 IOSP_GET_HDR_DATA_LEN( 1895 edge_serial->rxHeader1, 1896 edge_serial->rxHeader2); 1897 dbg("%s - Data for Port %u Len %u", 1898 __func__, 1899 edge_serial->rxPort, 1900 edge_serial->rxBytesRemaining); 1901 1902 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1903 * ASSERT(DevExt->RxBytesRemaining < 1904 * IOSP_MAX_DATA_LENGTH); 1905 */ 1906 1907 if (bufferLength == 0) { 1908 edge_serial->rxState = EXPECT_DATA; 1909 break; 1910 } 1911 /* Else, drop through */ 1912 } 1913 case EXPECT_DATA: /* Expect data */ 1914 if (bufferLength < edge_serial->rxBytesRemaining) { 1915 rxLen = bufferLength; 1916 /* Expect data to start next buffer */ 1917 edge_serial->rxState = EXPECT_DATA; 1918 } else { 1919 /* BufLen >= RxBytesRemaining */ 1920 rxLen = edge_serial->rxBytesRemaining; 1921 /* Start another header next time */ 1922 edge_serial->rxState = EXPECT_HDR1; 1923 } 1924 1925 bufferLength -= rxLen; 1926 edge_serial->rxBytesRemaining -= rxLen; 1927 1928 /* spit this data back into the tty driver if this 1929 port is open */ 1930 if (rxLen) { 1931 port = edge_serial->serial->port[ 1932 edge_serial->rxPort]; 1933 edge_port = usb_get_serial_port_data(port); 1934 if (edge_port->open) { 1935 tty = tty_port_tty_get( 1936 &edge_port->port->port); 1937 if (tty) { 1938 dbg("%s - Sending %d bytes to TTY for port %d", 1939 __func__, rxLen, edge_serial->rxPort); 1940 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1941 tty_kref_put(tty); 1942 } 1943 edge_port->icount.rx += rxLen; 1944 } 1945 buffer += rxLen; 1946 } 1947 break; 1948 1949 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1950 edge_serial->rxHeader3 = *buffer; 1951 ++buffer; 1952 --bufferLength; 1953 1954 /* We have all the header bytes, process the 1955 status now */ 1956 process_rcvd_status(edge_serial, 1957 edge_serial->rxStatusParam, 1958 edge_serial->rxHeader3); 1959 edge_serial->rxState = EXPECT_HDR1; 1960 break; 1961 } 1962 } 1963 } 1964 1965 1966 /***************************************************************************** 1967 * process_rcvd_status 1968 * this function handles the any status messages received on the 1969 * bulk in pipe. 1970 *****************************************************************************/ 1971 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1972 __u8 byte2, __u8 byte3) 1973 { 1974 struct usb_serial_port *port; 1975 struct edgeport_port *edge_port; 1976 struct tty_struct *tty; 1977 __u8 code = edge_serial->rxStatusCode; 1978 1979 /* switch the port pointer to the one being currently talked about */ 1980 port = edge_serial->serial->port[edge_serial->rxPort]; 1981 edge_port = usb_get_serial_port_data(port); 1982 if (edge_port == NULL) { 1983 dev_err(&edge_serial->serial->dev->dev, 1984 "%s - edge_port == NULL for port %d\n", 1985 __func__, edge_serial->rxPort); 1986 return; 1987 } 1988 1989 dbg("%s - port %d", __func__, edge_serial->rxPort); 1990 1991 if (code == IOSP_EXT_STATUS) { 1992 switch (byte2) { 1993 case IOSP_EXT_STATUS_CHASE_RSP: 1994 /* we want to do EXT status regardless of port 1995 * open/closed */ 1996 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", 1997 __func__, edge_serial->rxPort, byte3); 1998 /* Currently, the only EXT_STATUS is Chase, so process 1999 * here instead of one more call to one more subroutine 2000 * If/when more EXT_STATUS, there'll be more work to do 2001 * Also, we currently clear flag and close the port 2002 * regardless of content of above's Byte3. 2003 * We could choose to do something else when Byte3 says 2004 * Timeout on Chase from Edgeport, like wait longer in 2005 * block_until_chase_response, but for now we don't. 2006 */ 2007 edge_port->chaseResponsePending = false; 2008 wake_up(&edge_port->wait_chase); 2009 return; 2010 2011 case IOSP_EXT_STATUS_RX_CHECK_RSP: 2012 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3); 2013 /* Port->RxCheckRsp = true; */ 2014 return; 2015 } 2016 } 2017 2018 if (code == IOSP_STATUS_OPEN_RSP) { 2019 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 2020 edge_port->maxTxCredits = edge_port->txCredits; 2021 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 2022 handle_new_msr(edge_port, byte2); 2023 2024 /* send the current line settings to the port so we are 2025 in sync with any further termios calls */ 2026 tty = tty_port_tty_get(&edge_port->port->port); 2027 if (tty) { 2028 change_port_settings(tty, 2029 edge_port, tty->termios); 2030 tty_kref_put(tty); 2031 } 2032 2033 /* we have completed the open */ 2034 edge_port->openPending = false; 2035 edge_port->open = true; 2036 wake_up(&edge_port->wait_open); 2037 return; 2038 } 2039 2040 /* If port is closed, silently discard all rcvd status. We can 2041 * have cases where buffered status is received AFTER the close 2042 * port command is sent to the Edgeport. 2043 */ 2044 if (!edge_port->open || edge_port->closePending) 2045 return; 2046 2047 switch (code) { 2048 /* Not currently sent by Edgeport */ 2049 case IOSP_STATUS_LSR: 2050 dbg("%s - Port %u LSR Status = %02x", 2051 __func__, edge_serial->rxPort, byte2); 2052 handle_new_lsr(edge_port, false, byte2, 0); 2053 break; 2054 2055 case IOSP_STATUS_LSR_DATA: 2056 dbg("%s - Port %u LSR Status = %02x, Data = %02x", 2057 __func__, edge_serial->rxPort, byte2, byte3); 2058 /* byte2 is LSR Register */ 2059 /* byte3 is broken data byte */ 2060 handle_new_lsr(edge_port, true, byte2, byte3); 2061 break; 2062 /* 2063 * case IOSP_EXT_4_STATUS: 2064 * dbg("%s - Port %u LSR Status = %02x Data = %02x", 2065 * __func__, edge_serial->rxPort, byte2, byte3); 2066 * break; 2067 */ 2068 case IOSP_STATUS_MSR: 2069 dbg("%s - Port %u MSR Status = %02x", 2070 __func__, edge_serial->rxPort, byte2); 2071 /* 2072 * Process this new modem status and generate appropriate 2073 * events, etc, based on the new status. This routine 2074 * also saves the MSR in Port->ShadowMsr. 2075 */ 2076 handle_new_msr(edge_port, byte2); 2077 break; 2078 2079 default: 2080 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code); 2081 break; 2082 } 2083 return; 2084 } 2085 2086 2087 /***************************************************************************** 2088 * edge_tty_recv 2089 * this function passes data on to the tty flip buffer 2090 *****************************************************************************/ 2091 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 2092 unsigned char *data, int length) 2093 { 2094 int cnt; 2095 2096 do { 2097 cnt = tty_buffer_request_room(tty, length); 2098 if (cnt < length) { 2099 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2100 __func__, length - cnt); 2101 if (cnt == 0) 2102 break; 2103 } 2104 tty_insert_flip_string(tty, data, cnt); 2105 data += cnt; 2106 length -= cnt; 2107 } while (length > 0); 2108 2109 tty_flip_buffer_push(tty); 2110 } 2111 2112 2113 /***************************************************************************** 2114 * handle_new_msr 2115 * this function handles any change to the msr register for a port. 2116 *****************************************************************************/ 2117 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2118 { 2119 struct async_icount *icount; 2120 2121 dbg("%s %02x", __func__, newMsr); 2122 2123 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2124 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2125 icount = &edge_port->icount; 2126 2127 /* update input line counters */ 2128 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2129 icount->cts++; 2130 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2131 icount->dsr++; 2132 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2133 icount->dcd++; 2134 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2135 icount->rng++; 2136 wake_up_interruptible(&edge_port->delta_msr_wait); 2137 } 2138 2139 /* Save the new modem status */ 2140 edge_port->shadowMSR = newMsr & 0xf0; 2141 2142 return; 2143 } 2144 2145 2146 /***************************************************************************** 2147 * handle_new_lsr 2148 * this function handles any change to the lsr register for a port. 2149 *****************************************************************************/ 2150 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2151 __u8 lsr, __u8 data) 2152 { 2153 __u8 newLsr = (__u8) (lsr & (__u8) 2154 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2155 struct async_icount *icount; 2156 2157 dbg("%s - %02x", __func__, newLsr); 2158 2159 edge_port->shadowLSR = lsr; 2160 2161 if (newLsr & LSR_BREAK) { 2162 /* 2163 * Parity and Framing errors only count if they 2164 * occur exclusive of a break being 2165 * received. 2166 */ 2167 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2168 } 2169 2170 /* Place LSR data byte into Rx buffer */ 2171 if (lsrData) { 2172 struct tty_struct *tty = 2173 tty_port_tty_get(&edge_port->port->port); 2174 if (tty) { 2175 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 2176 tty_kref_put(tty); 2177 } 2178 } 2179 /* update input line counters */ 2180 icount = &edge_port->icount; 2181 if (newLsr & LSR_BREAK) 2182 icount->brk++; 2183 if (newLsr & LSR_OVER_ERR) 2184 icount->overrun++; 2185 if (newLsr & LSR_PAR_ERR) 2186 icount->parity++; 2187 if (newLsr & LSR_FRM_ERR) 2188 icount->frame++; 2189 2190 return; 2191 } 2192 2193 2194 /**************************************************************************** 2195 * sram_write 2196 * writes a number of bytes to the Edgeport device's sram starting at the 2197 * given address. 2198 * If successful returns the number of bytes written, otherwise it returns 2199 * a negative error number of the problem. 2200 ****************************************************************************/ 2201 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2202 __u16 length, const __u8 *data) 2203 { 2204 int result; 2205 __u16 current_length; 2206 unsigned char *transfer_buffer; 2207 2208 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2209 2210 transfer_buffer = kmalloc(64, GFP_KERNEL); 2211 if (!transfer_buffer) { 2212 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2213 __func__, 64); 2214 return -ENOMEM; 2215 } 2216 2217 /* need to split these writes up into 64 byte chunks */ 2218 result = 0; 2219 while (length > 0) { 2220 if (length > 64) 2221 current_length = 64; 2222 else 2223 current_length = length; 2224 2225 /* dbg("%s - writing %x, %x, %d", __func__, 2226 extAddr, addr, current_length); */ 2227 memcpy(transfer_buffer, data, current_length); 2228 result = usb_control_msg(serial->dev, 2229 usb_sndctrlpipe(serial->dev, 0), 2230 USB_REQUEST_ION_WRITE_RAM, 2231 0x40, addr, extAddr, transfer_buffer, 2232 current_length, 300); 2233 if (result < 0) 2234 break; 2235 length -= current_length; 2236 addr += current_length; 2237 data += current_length; 2238 } 2239 2240 kfree(transfer_buffer); 2241 return result; 2242 } 2243 2244 2245 /**************************************************************************** 2246 * rom_write 2247 * writes a number of bytes to the Edgeport device's ROM starting at the 2248 * given address. 2249 * If successful returns the number of bytes written, otherwise it returns 2250 * a negative error number of the problem. 2251 ****************************************************************************/ 2252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2253 __u16 length, const __u8 *data) 2254 { 2255 int result; 2256 __u16 current_length; 2257 unsigned char *transfer_buffer; 2258 2259 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */ 2260 2261 transfer_buffer = kmalloc(64, GFP_KERNEL); 2262 if (!transfer_buffer) { 2263 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2264 __func__, 64); 2265 return -ENOMEM; 2266 } 2267 2268 /* need to split these writes up into 64 byte chunks */ 2269 result = 0; 2270 while (length > 0) { 2271 if (length > 64) 2272 current_length = 64; 2273 else 2274 current_length = length; 2275 /* dbg("%s - writing %x, %x, %d", __func__, 2276 extAddr, addr, current_length); */ 2277 memcpy(transfer_buffer, data, current_length); 2278 result = usb_control_msg(serial->dev, 2279 usb_sndctrlpipe(serial->dev, 0), 2280 USB_REQUEST_ION_WRITE_ROM, 0x40, 2281 addr, extAddr, 2282 transfer_buffer, current_length, 300); 2283 if (result < 0) 2284 break; 2285 length -= current_length; 2286 addr += current_length; 2287 data += current_length; 2288 } 2289 2290 kfree(transfer_buffer); 2291 return result; 2292 } 2293 2294 2295 /**************************************************************************** 2296 * rom_read 2297 * reads a number of bytes from the Edgeport device starting at the given 2298 * address. 2299 * If successful returns the number of bytes read, otherwise it returns 2300 * a negative error number of the problem. 2301 ****************************************************************************/ 2302 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2303 __u16 addr, __u16 length, __u8 *data) 2304 { 2305 int result; 2306 __u16 current_length; 2307 unsigned char *transfer_buffer; 2308 2309 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2310 2311 transfer_buffer = kmalloc(64, GFP_KERNEL); 2312 if (!transfer_buffer) { 2313 dev_err(&serial->dev->dev, 2314 "%s - kmalloc(%d) failed.\n", __func__, 64); 2315 return -ENOMEM; 2316 } 2317 2318 /* need to split these reads up into 64 byte chunks */ 2319 result = 0; 2320 while (length > 0) { 2321 if (length > 64) 2322 current_length = 64; 2323 else 2324 current_length = length; 2325 /* dbg("%s - %x, %x, %d", __func__, 2326 extAddr, addr, current_length); */ 2327 result = usb_control_msg(serial->dev, 2328 usb_rcvctrlpipe(serial->dev, 0), 2329 USB_REQUEST_ION_READ_ROM, 2330 0xC0, addr, extAddr, transfer_buffer, 2331 current_length, 300); 2332 if (result < 0) 2333 break; 2334 memcpy(data, transfer_buffer, current_length); 2335 length -= current_length; 2336 addr += current_length; 2337 data += current_length; 2338 } 2339 2340 kfree(transfer_buffer); 2341 return result; 2342 } 2343 2344 2345 /**************************************************************************** 2346 * send_iosp_ext_cmd 2347 * Is used to send a IOSP message to the Edgeport device 2348 ****************************************************************************/ 2349 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2350 __u8 command, __u8 param) 2351 { 2352 unsigned char *buffer; 2353 unsigned char *currentCommand; 2354 int length = 0; 2355 int status = 0; 2356 2357 dbg("%s - %d, %d", __func__, command, param); 2358 2359 buffer = kmalloc(10, GFP_ATOMIC); 2360 if (!buffer) { 2361 dev_err(&edge_port->port->dev, 2362 "%s - kmalloc(%d) failed.\n", __func__, 10); 2363 return -ENOMEM; 2364 } 2365 2366 currentCommand = buffer; 2367 2368 MAKE_CMD_EXT_CMD(¤tCommand, &length, 2369 edge_port->port->number - edge_port->port->serial->minor, 2370 command, param); 2371 2372 status = write_cmd_usb(edge_port, buffer, length); 2373 if (status) { 2374 /* something bad happened, let's free up the memory */ 2375 kfree(buffer); 2376 } 2377 2378 return status; 2379 } 2380 2381 2382 /***************************************************************************** 2383 * write_cmd_usb 2384 * this function writes the given buffer out to the bulk write endpoint. 2385 *****************************************************************************/ 2386 static int write_cmd_usb(struct edgeport_port *edge_port, 2387 unsigned char *buffer, int length) 2388 { 2389 struct edgeport_serial *edge_serial = 2390 usb_get_serial_data(edge_port->port->serial); 2391 int status = 0; 2392 struct urb *urb; 2393 int timeout; 2394 2395 usb_serial_debug_data(debug, &edge_port->port->dev, 2396 __func__, length, buffer); 2397 2398 /* Allocate our next urb */ 2399 urb = usb_alloc_urb(0, GFP_ATOMIC); 2400 if (!urb) 2401 return -ENOMEM; 2402 2403 atomic_inc(&CmdUrbs); 2404 dbg("%s - ALLOCATE URB %p (outstanding %d)", 2405 __func__, urb, atomic_read(&CmdUrbs)); 2406 2407 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2408 usb_sndbulkpipe(edge_serial->serial->dev, 2409 edge_serial->bulk_out_endpoint), 2410 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2411 2412 edge_port->commandPending = true; 2413 status = usb_submit_urb(urb, GFP_ATOMIC); 2414 2415 if (status) { 2416 /* something went wrong */ 2417 dev_err(&edge_port->port->dev, 2418 "%s - usb_submit_urb(write command) failed, status = %d\n", 2419 __func__, status); 2420 usb_kill_urb(urb); 2421 usb_free_urb(urb); 2422 atomic_dec(&CmdUrbs); 2423 return status; 2424 } 2425 2426 /* wait for command to finish */ 2427 timeout = COMMAND_TIMEOUT; 2428 #if 0 2429 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2430 2431 if (edge_port->commandPending) { 2432 /* command timed out */ 2433 dbg("%s - command timed out", __func__); 2434 status = -EINVAL; 2435 } 2436 #endif 2437 return status; 2438 } 2439 2440 2441 /***************************************************************************** 2442 * send_cmd_write_baud_rate 2443 * this function sends the proper command to change the baud rate of the 2444 * specified port. 2445 *****************************************************************************/ 2446 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2447 int baudRate) 2448 { 2449 struct edgeport_serial *edge_serial = 2450 usb_get_serial_data(edge_port->port->serial); 2451 unsigned char *cmdBuffer; 2452 unsigned char *currCmd; 2453 int cmdLen = 0; 2454 int divisor; 2455 int status; 2456 unsigned char number = 2457 edge_port->port->number - edge_port->port->serial->minor; 2458 2459 if (edge_serial->is_epic && 2460 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2461 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2462 edge_port->port->number, baudRate); 2463 return 0; 2464 } 2465 2466 dbg("%s - port = %d, baud = %d", __func__, 2467 edge_port->port->number, baudRate); 2468 2469 status = calc_baud_rate_divisor(baudRate, &divisor); 2470 if (status) { 2471 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", 2472 __func__); 2473 return status; 2474 } 2475 2476 /* Alloc memory for the string of commands. */ 2477 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2478 if (!cmdBuffer) { 2479 dev_err(&edge_port->port->dev, 2480 "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2481 return -ENOMEM; 2482 } 2483 currCmd = cmdBuffer; 2484 2485 /* Enable access to divisor latch */ 2486 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2487 2488 /* Write the divisor itself */ 2489 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2490 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2491 2492 /* Restore original value to disable access to divisor latch */ 2493 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2494 edge_port->shadowLCR); 2495 2496 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2497 if (status) { 2498 /* something bad happened, let's free up the memory */ 2499 kfree(cmdBuffer); 2500 } 2501 2502 return status; 2503 } 2504 2505 2506 /***************************************************************************** 2507 * calc_baud_rate_divisor 2508 * this function calculates the proper baud rate divisor for the specified 2509 * baud rate. 2510 *****************************************************************************/ 2511 static int calc_baud_rate_divisor(int baudrate, int *divisor) 2512 { 2513 int i; 2514 __u16 custom; 2515 2516 2517 dbg("%s - %d", __func__, baudrate); 2518 2519 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2520 if (divisor_table[i].BaudRate == baudrate) { 2521 *divisor = divisor_table[i].Divisor; 2522 return 0; 2523 } 2524 } 2525 2526 /* We have tried all of the standard baud rates 2527 * lets try to calculate the divisor for this baud rate 2528 * Make sure the baud rate is reasonable */ 2529 if (baudrate > 50 && baudrate < 230400) { 2530 /* get divisor */ 2531 custom = (__u16)((230400L + baudrate/2) / baudrate); 2532 2533 *divisor = custom; 2534 2535 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom); 2536 return 0; 2537 } 2538 2539 return -1; 2540 } 2541 2542 2543 /***************************************************************************** 2544 * send_cmd_write_uart_register 2545 * this function builds up a uart register message and sends to to the device. 2546 *****************************************************************************/ 2547 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2548 __u8 regNum, __u8 regValue) 2549 { 2550 struct edgeport_serial *edge_serial = 2551 usb_get_serial_data(edge_port->port->serial); 2552 unsigned char *cmdBuffer; 2553 unsigned char *currCmd; 2554 unsigned long cmdLen = 0; 2555 int status; 2556 2557 dbg("%s - write to %s register 0x%02x", 2558 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2559 2560 if (edge_serial->is_epic && 2561 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2562 regNum == MCR) { 2563 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2564 return 0; 2565 } 2566 2567 if (edge_serial->is_epic && 2568 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2569 regNum == LCR) { 2570 dbg("SendCmdWriteUartReg - Not writing to LCR Register"); 2571 return 0; 2572 } 2573 2574 /* Alloc memory for the string of commands. */ 2575 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2576 if (cmdBuffer == NULL) 2577 return -ENOMEM; 2578 2579 currCmd = cmdBuffer; 2580 2581 /* Build a cmd in the buffer to write the given register */ 2582 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, 2583 edge_port->port->number - edge_port->port->serial->minor, 2584 regNum, regValue); 2585 2586 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2587 if (status) { 2588 /* something bad happened, let's free up the memory */ 2589 kfree(cmdBuffer); 2590 } 2591 2592 return status; 2593 } 2594 2595 2596 /***************************************************************************** 2597 * change_port_settings 2598 * This routine is called to set the UART on the device to match the 2599 * specified new settings. 2600 *****************************************************************************/ 2601 2602 static void change_port_settings(struct tty_struct *tty, 2603 struct edgeport_port *edge_port, struct ktermios *old_termios) 2604 { 2605 struct edgeport_serial *edge_serial = 2606 usb_get_serial_data(edge_port->port->serial); 2607 int baud; 2608 unsigned cflag; 2609 __u8 mask = 0xff; 2610 __u8 lData; 2611 __u8 lParity; 2612 __u8 lStop; 2613 __u8 rxFlow; 2614 __u8 txFlow; 2615 int status; 2616 2617 dbg("%s - port %d", __func__, edge_port->port->number); 2618 2619 if (!edge_port->open && 2620 !edge_port->openPending) { 2621 dbg("%s - port not opened", __func__); 2622 return; 2623 } 2624 2625 cflag = tty->termios->c_cflag; 2626 2627 switch (cflag & CSIZE) { 2628 case CS5: 2629 lData = LCR_BITS_5; mask = 0x1f; 2630 dbg("%s - data bits = 5", __func__); 2631 break; 2632 case CS6: 2633 lData = LCR_BITS_6; mask = 0x3f; 2634 dbg("%s - data bits = 6", __func__); 2635 break; 2636 case CS7: 2637 lData = LCR_BITS_7; mask = 0x7f; 2638 dbg("%s - data bits = 7", __func__); 2639 break; 2640 default: 2641 case CS8: 2642 lData = LCR_BITS_8; 2643 dbg("%s - data bits = 8", __func__); 2644 break; 2645 } 2646 2647 lParity = LCR_PAR_NONE; 2648 if (cflag & PARENB) { 2649 if (cflag & CMSPAR) { 2650 if (cflag & PARODD) { 2651 lParity = LCR_PAR_MARK; 2652 dbg("%s - parity = mark", __func__); 2653 } else { 2654 lParity = LCR_PAR_SPACE; 2655 dbg("%s - parity = space", __func__); 2656 } 2657 } else if (cflag & PARODD) { 2658 lParity = LCR_PAR_ODD; 2659 dbg("%s - parity = odd", __func__); 2660 } else { 2661 lParity = LCR_PAR_EVEN; 2662 dbg("%s - parity = even", __func__); 2663 } 2664 } else { 2665 dbg("%s - parity = none", __func__); 2666 } 2667 2668 if (cflag & CSTOPB) { 2669 lStop = LCR_STOP_2; 2670 dbg("%s - stop bits = 2", __func__); 2671 } else { 2672 lStop = LCR_STOP_1; 2673 dbg("%s - stop bits = 1", __func__); 2674 } 2675 2676 /* figure out the flow control settings */ 2677 rxFlow = txFlow = 0x00; 2678 if (cflag & CRTSCTS) { 2679 rxFlow |= IOSP_RX_FLOW_RTS; 2680 txFlow |= IOSP_TX_FLOW_CTS; 2681 dbg("%s - RTS/CTS is enabled", __func__); 2682 } else { 2683 dbg("%s - RTS/CTS is disabled", __func__); 2684 } 2685 2686 /* if we are implementing XON/XOFF, set the start and stop character 2687 in the device */ 2688 if (I_IXOFF(tty) || I_IXON(tty)) { 2689 unsigned char stop_char = STOP_CHAR(tty); 2690 unsigned char start_char = START_CHAR(tty); 2691 2692 if ((!edge_serial->is_epic) || 2693 ((edge_serial->is_epic) && 2694 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2695 send_iosp_ext_cmd(edge_port, 2696 IOSP_CMD_SET_XON_CHAR, start_char); 2697 send_iosp_ext_cmd(edge_port, 2698 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2699 } 2700 2701 /* if we are implementing INBOUND XON/XOFF */ 2702 if (I_IXOFF(tty)) { 2703 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2704 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2705 __func__, start_char, stop_char); 2706 } else { 2707 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2708 } 2709 2710 /* if we are implementing OUTBOUND XON/XOFF */ 2711 if (I_IXON(tty)) { 2712 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2713 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2714 __func__, start_char, stop_char); 2715 } else { 2716 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2717 } 2718 } 2719 2720 /* Set flow control to the configured value */ 2721 if ((!edge_serial->is_epic) || 2722 ((edge_serial->is_epic) && 2723 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2724 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2725 if ((!edge_serial->is_epic) || 2726 ((edge_serial->is_epic) && 2727 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2728 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2729 2730 2731 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2732 edge_port->shadowLCR |= (lData | lParity | lStop); 2733 2734 edge_port->validDataMask = mask; 2735 2736 /* Send the updated LCR value to the EdgePort */ 2737 status = send_cmd_write_uart_register(edge_port, LCR, 2738 edge_port->shadowLCR); 2739 if (status != 0) 2740 return; 2741 2742 /* set up the MCR register and send it to the EdgePort */ 2743 edge_port->shadowMCR = MCR_MASTER_IE; 2744 if (cflag & CBAUD) 2745 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2746 2747 status = send_cmd_write_uart_register(edge_port, MCR, 2748 edge_port->shadowMCR); 2749 if (status != 0) 2750 return; 2751 2752 /* Determine divisor based on baud rate */ 2753 baud = tty_get_baud_rate(tty); 2754 if (!baud) { 2755 /* pick a default, any default... */ 2756 baud = 9600; 2757 } 2758 2759 dbg("%s - baud rate = %d", __func__, baud); 2760 status = send_cmd_write_baud_rate(edge_port, baud); 2761 if (status == -1) { 2762 /* Speed change was not possible - put back the old speed */ 2763 baud = tty_termios_baud_rate(old_termios); 2764 tty_encode_baud_rate(tty, baud, baud); 2765 } 2766 return; 2767 } 2768 2769 2770 /**************************************************************************** 2771 * unicode_to_ascii 2772 * Turns a string from Unicode into ASCII. 2773 * Doesn't do a good job with any characters that are outside the normal 2774 * ASCII range, but it's only for debugging... 2775 * NOTE: expects the unicode in LE format 2776 ****************************************************************************/ 2777 static void unicode_to_ascii(char *string, int buflen, 2778 __le16 *unicode, int unicode_size) 2779 { 2780 int i; 2781 2782 if (buflen <= 0) /* never happens, but... */ 2783 return; 2784 --buflen; /* space for nul */ 2785 2786 for (i = 0; i < unicode_size; i++) { 2787 if (i >= buflen) 2788 break; 2789 string[i] = (char)(le16_to_cpu(unicode[i])); 2790 } 2791 string[i] = 0x00; 2792 } 2793 2794 2795 /**************************************************************************** 2796 * get_manufacturing_desc 2797 * reads in the manufacturing descriptor and stores it into the serial 2798 * structure. 2799 ****************************************************************************/ 2800 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2801 { 2802 int response; 2803 2804 dbg("getting manufacturer descriptor"); 2805 2806 response = rom_read(edge_serial->serial, 2807 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2808 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2809 EDGE_MANUF_DESC_LEN, 2810 (__u8 *)(&edge_serial->manuf_descriptor)); 2811 2812 if (response < 1) 2813 dev_err(&edge_serial->serial->dev->dev, 2814 "error in getting manufacturer descriptor\n"); 2815 else { 2816 char string[30]; 2817 dbg("**Manufacturer Descriptor"); 2818 dbg(" RomSize: %dK", 2819 edge_serial->manuf_descriptor.RomSize); 2820 dbg(" RamSize: %dK", 2821 edge_serial->manuf_descriptor.RamSize); 2822 dbg(" CpuRev: %d", 2823 edge_serial->manuf_descriptor.CpuRev); 2824 dbg(" BoardRev: %d", 2825 edge_serial->manuf_descriptor.BoardRev); 2826 dbg(" NumPorts: %d", 2827 edge_serial->manuf_descriptor.NumPorts); 2828 dbg(" DescDate: %d/%d/%d", 2829 edge_serial->manuf_descriptor.DescDate[0], 2830 edge_serial->manuf_descriptor.DescDate[1], 2831 edge_serial->manuf_descriptor.DescDate[2]+1900); 2832 unicode_to_ascii(string, sizeof(string), 2833 edge_serial->manuf_descriptor.SerialNumber, 2834 edge_serial->manuf_descriptor.SerNumLength/2); 2835 dbg(" SerialNumber: %s", string); 2836 unicode_to_ascii(string, sizeof(string), 2837 edge_serial->manuf_descriptor.AssemblyNumber, 2838 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2839 dbg(" AssemblyNumber: %s", string); 2840 unicode_to_ascii(string, sizeof(string), 2841 edge_serial->manuf_descriptor.OemAssyNumber, 2842 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2843 dbg(" OemAssyNumber: %s", string); 2844 dbg(" UartType: %d", 2845 edge_serial->manuf_descriptor.UartType); 2846 dbg(" IonPid: %d", 2847 edge_serial->manuf_descriptor.IonPid); 2848 dbg(" IonConfig: %d", 2849 edge_serial->manuf_descriptor.IonConfig); 2850 } 2851 } 2852 2853 2854 /**************************************************************************** 2855 * get_boot_desc 2856 * reads in the bootloader descriptor and stores it into the serial 2857 * structure. 2858 ****************************************************************************/ 2859 static void get_boot_desc(struct edgeport_serial *edge_serial) 2860 { 2861 int response; 2862 2863 dbg("getting boot descriptor"); 2864 2865 response = rom_read(edge_serial->serial, 2866 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2867 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2868 EDGE_BOOT_DESC_LEN, 2869 (__u8 *)(&edge_serial->boot_descriptor)); 2870 2871 if (response < 1) 2872 dev_err(&edge_serial->serial->dev->dev, 2873 "error in getting boot descriptor\n"); 2874 else { 2875 dbg("**Boot Descriptor:"); 2876 dbg(" BootCodeLength: %d", 2877 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2878 dbg(" MajorVersion: %d", 2879 edge_serial->boot_descriptor.MajorVersion); 2880 dbg(" MinorVersion: %d", 2881 edge_serial->boot_descriptor.MinorVersion); 2882 dbg(" BuildNumber: %d", 2883 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2884 dbg(" Capabilities: 0x%x", 2885 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2886 dbg(" UConfig0: %d", 2887 edge_serial->boot_descriptor.UConfig0); 2888 dbg(" UConfig1: %d", 2889 edge_serial->boot_descriptor.UConfig1); 2890 } 2891 } 2892 2893 2894 /**************************************************************************** 2895 * load_application_firmware 2896 * This is called to load the application firmware to the device 2897 ****************************************************************************/ 2898 static void load_application_firmware(struct edgeport_serial *edge_serial) 2899 { 2900 const struct ihex_binrec *rec; 2901 const struct firmware *fw; 2902 const char *fw_name; 2903 const char *fw_info; 2904 int response; 2905 __u32 Operaddr; 2906 __u16 build; 2907 2908 switch (edge_serial->product_info.iDownloadFile) { 2909 case EDGE_DOWNLOAD_FILE_I930: 2910 fw_info = "downloading firmware version (930)"; 2911 fw_name = "edgeport/down.fw"; 2912 break; 2913 2914 case EDGE_DOWNLOAD_FILE_80251: 2915 fw_info = "downloading firmware version (80251)"; 2916 fw_name = "edgeport/down2.fw"; 2917 break; 2918 2919 case EDGE_DOWNLOAD_FILE_NONE: 2920 dbg ("No download file specified, skipping download\n"); 2921 return; 2922 2923 default: 2924 return; 2925 } 2926 2927 response = request_ihex_firmware(&fw, fw_name, 2928 &edge_serial->serial->dev->dev); 2929 if (response) { 2930 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 2931 fw_name, response); 2932 return; 2933 } 2934 2935 rec = (const struct ihex_binrec *)fw->data; 2936 build = (rec->data[2] << 8) | rec->data[3]; 2937 2938 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build); 2939 2940 edge_serial->product_info.FirmwareMajorVersion = fw->data[0]; 2941 edge_serial->product_info.FirmwareMinorVersion = fw->data[1]; 2942 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2943 2944 for (rec = ihex_next_binrec(rec); rec; 2945 rec = ihex_next_binrec(rec)) { 2946 Operaddr = be32_to_cpu(rec->addr); 2947 response = sram_write(edge_serial->serial, 2948 Operaddr >> 16, 2949 Operaddr & 0xFFFF, 2950 be16_to_cpu(rec->len), 2951 &rec->data[0]); 2952 if (response < 0) { 2953 dev_err(&edge_serial->serial->dev->dev, 2954 "sram_write failed (%x, %x, %d)\n", 2955 Operaddr >> 16, Operaddr & 0xFFFF, 2956 be16_to_cpu(rec->len)); 2957 break; 2958 } 2959 } 2960 2961 dbg("sending exec_dl_code"); 2962 response = usb_control_msg (edge_serial->serial->dev, 2963 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2964 USB_REQUEST_ION_EXEC_DL_CODE, 2965 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2966 2967 release_firmware(fw); 2968 return; 2969 } 2970 2971 2972 /**************************************************************************** 2973 * edge_startup 2974 ****************************************************************************/ 2975 static int edge_startup(struct usb_serial *serial) 2976 { 2977 struct edgeport_serial *edge_serial; 2978 struct edgeport_port *edge_port; 2979 struct usb_device *dev; 2980 int i, j; 2981 int response; 2982 bool interrupt_in_found; 2983 bool bulk_in_found; 2984 bool bulk_out_found; 2985 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2986 EDGE_COMPATIBILITY_MASK1, 2987 EDGE_COMPATIBILITY_MASK2 }; 2988 2989 dev = serial->dev; 2990 2991 /* create our private serial structure */ 2992 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2993 if (edge_serial == NULL) { 2994 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2995 return -ENOMEM; 2996 } 2997 spin_lock_init(&edge_serial->es_lock); 2998 edge_serial->serial = serial; 2999 usb_set_serial_data(serial, edge_serial); 3000 3001 /* get the name for the device from the device */ 3002 i = get_string(dev, dev->descriptor.iManufacturer, 3003 &edge_serial->name[0], MAX_NAME_LEN+1); 3004 edge_serial->name[i++] = ' '; 3005 get_string(dev, dev->descriptor.iProduct, 3006 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 3007 3008 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 3009 3010 /* Read the epic descriptor */ 3011 if (get_epic_descriptor(edge_serial) <= 0) { 3012 /* memcpy descriptor to Supports structures */ 3013 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 3014 sizeof(struct edge_compatibility_bits)); 3015 3016 /* get the manufacturing descriptor for this device */ 3017 get_manufacturing_desc(edge_serial); 3018 3019 /* get the boot descriptor */ 3020 get_boot_desc(edge_serial); 3021 3022 get_product_info(edge_serial); 3023 } 3024 3025 /* set the number of ports from the manufacturing description */ 3026 /* serial->num_ports = serial->product_info.NumPorts; */ 3027 if ((!edge_serial->is_epic) && 3028 (edge_serial->product_info.NumPorts != serial->num_ports)) { 3029 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 3030 "vs. core thinking we have %d ports, email " 3031 "greg@kroah.com this information.\n", 3032 edge_serial->product_info.NumPorts, 3033 serial->num_ports); 3034 } 3035 3036 dbg("%s - time 1 %ld", __func__, jiffies); 3037 3038 /* If not an EPiC device */ 3039 if (!edge_serial->is_epic) { 3040 /* now load the application firmware into this device */ 3041 load_application_firmware(edge_serial); 3042 3043 dbg("%s - time 2 %ld", __func__, jiffies); 3044 3045 /* Check current Edgeport EEPROM and update if necessary */ 3046 update_edgeport_E2PROM(edge_serial); 3047 3048 dbg("%s - time 3 %ld", __func__, jiffies); 3049 3050 /* set the configuration to use #1 */ 3051 /* dbg("set_configuration 1"); */ 3052 /* usb_set_configuration (dev, 1); */ 3053 } 3054 dbg(" FirmwareMajorVersion %d.%d.%d", 3055 edge_serial->product_info.FirmwareMajorVersion, 3056 edge_serial->product_info.FirmwareMinorVersion, 3057 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 3058 3059 /* we set up the pointers to the endpoints in the edge_open function, 3060 * as the structures aren't created yet. */ 3061 3062 /* set up our port private structures */ 3063 for (i = 0; i < serial->num_ports; ++i) { 3064 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL); 3065 if (edge_port == NULL) { 3066 dev_err(&serial->dev->dev, "%s - Out of memory\n", 3067 __func__); 3068 for (j = 0; j < i; ++j) { 3069 kfree(usb_get_serial_port_data(serial->port[j])); 3070 usb_set_serial_port_data(serial->port[j], 3071 NULL); 3072 } 3073 usb_set_serial_data(serial, NULL); 3074 kfree(edge_serial); 3075 return -ENOMEM; 3076 } 3077 memset(edge_port, 0, sizeof(struct edgeport_port)); 3078 spin_lock_init(&edge_port->ep_lock); 3079 edge_port->port = serial->port[i]; 3080 usb_set_serial_port_data(serial->port[i], edge_port); 3081 } 3082 3083 response = 0; 3084 3085 if (edge_serial->is_epic) { 3086 /* EPIC thing, set up our interrupt polling now and our read 3087 * urb, so that the device knows it really is connected. */ 3088 interrupt_in_found = bulk_in_found = bulk_out_found = false; 3089 for (i = 0; i < serial->interface->altsetting[0] 3090 .desc.bNumEndpoints; ++i) { 3091 struct usb_endpoint_descriptor *endpoint; 3092 int buffer_size; 3093 3094 endpoint = &serial->interface->altsetting[0]. 3095 endpoint[i].desc; 3096 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 3097 if (!interrupt_in_found && 3098 (usb_endpoint_is_int_in(endpoint))) { 3099 /* we found a interrupt in endpoint */ 3100 dbg("found interrupt in"); 3101 3102 /* not set up yet, so do it now */ 3103 edge_serial->interrupt_read_urb = 3104 usb_alloc_urb(0, GFP_KERNEL); 3105 if (!edge_serial->interrupt_read_urb) { 3106 dev_err(&dev->dev, "out of memory\n"); 3107 return -ENOMEM; 3108 } 3109 edge_serial->interrupt_in_buffer = 3110 kmalloc(buffer_size, GFP_KERNEL); 3111 if (!edge_serial->interrupt_in_buffer) { 3112 dev_err(&dev->dev, "out of memory\n"); 3113 usb_free_urb(edge_serial->interrupt_read_urb); 3114 return -ENOMEM; 3115 } 3116 edge_serial->interrupt_in_endpoint = 3117 endpoint->bEndpointAddress; 3118 3119 /* set up our interrupt urb */ 3120 usb_fill_int_urb( 3121 edge_serial->interrupt_read_urb, 3122 dev, 3123 usb_rcvintpipe(dev, 3124 endpoint->bEndpointAddress), 3125 edge_serial->interrupt_in_buffer, 3126 buffer_size, 3127 edge_interrupt_callback, 3128 edge_serial, 3129 endpoint->bInterval); 3130 3131 interrupt_in_found = true; 3132 } 3133 3134 if (!bulk_in_found && 3135 (usb_endpoint_is_bulk_in(endpoint))) { 3136 /* we found a bulk in endpoint */ 3137 dbg("found bulk in"); 3138 3139 /* not set up yet, so do it now */ 3140 edge_serial->read_urb = 3141 usb_alloc_urb(0, GFP_KERNEL); 3142 if (!edge_serial->read_urb) { 3143 dev_err(&dev->dev, "out of memory\n"); 3144 return -ENOMEM; 3145 } 3146 edge_serial->bulk_in_buffer = 3147 kmalloc(buffer_size, GFP_KERNEL); 3148 if (!edge_serial->bulk_in_buffer) { 3149 dev_err(&dev->dev, "out of memory\n"); 3150 usb_free_urb(edge_serial->read_urb); 3151 return -ENOMEM; 3152 } 3153 edge_serial->bulk_in_endpoint = 3154 endpoint->bEndpointAddress; 3155 3156 /* set up our bulk in urb */ 3157 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3158 usb_rcvbulkpipe(dev, 3159 endpoint->bEndpointAddress), 3160 edge_serial->bulk_in_buffer, 3161 le16_to_cpu(endpoint->wMaxPacketSize), 3162 edge_bulk_in_callback, 3163 edge_serial); 3164 bulk_in_found = true; 3165 } 3166 3167 if (!bulk_out_found && 3168 (usb_endpoint_is_bulk_out(endpoint))) { 3169 /* we found a bulk out endpoint */ 3170 dbg("found bulk out"); 3171 edge_serial->bulk_out_endpoint = 3172 endpoint->bEndpointAddress; 3173 bulk_out_found = true; 3174 } 3175 } 3176 3177 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3178 dev_err(&dev->dev, "Error - the proper endpoints " 3179 "were not found!\n"); 3180 return -ENODEV; 3181 } 3182 3183 /* start interrupt read for this edgeport this interrupt will 3184 * continue as long as the edgeport is connected */ 3185 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3186 GFP_KERNEL); 3187 if (response) 3188 dev_err(&dev->dev, 3189 "%s - Error %d submitting control urb\n", 3190 __func__, response); 3191 } 3192 return response; 3193 } 3194 3195 3196 /**************************************************************************** 3197 * edge_disconnect 3198 * This function is called whenever the device is removed from the usb bus. 3199 ****************************************************************************/ 3200 static void edge_disconnect(struct usb_serial *serial) 3201 { 3202 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3203 3204 dbg("%s", __func__); 3205 3206 /* stop reads and writes on all ports */ 3207 /* free up our endpoint stuff */ 3208 if (edge_serial->is_epic) { 3209 usb_kill_urb(edge_serial->interrupt_read_urb); 3210 usb_free_urb(edge_serial->interrupt_read_urb); 3211 kfree(edge_serial->interrupt_in_buffer); 3212 3213 usb_kill_urb(edge_serial->read_urb); 3214 usb_free_urb(edge_serial->read_urb); 3215 kfree(edge_serial->bulk_in_buffer); 3216 } 3217 } 3218 3219 3220 /**************************************************************************** 3221 * edge_release 3222 * This function is called when the device structure is deallocated. 3223 ****************************************************************************/ 3224 static void edge_release(struct usb_serial *serial) 3225 { 3226 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3227 int i; 3228 3229 dbg("%s", __func__); 3230 3231 for (i = 0; i < serial->num_ports; ++i) 3232 kfree(usb_get_serial_port_data(serial->port[i])); 3233 3234 kfree(edge_serial); 3235 } 3236 3237 3238 /**************************************************************************** 3239 * edgeport_init 3240 * This is called by the module subsystem, or on startup to initialize us 3241 ****************************************************************************/ 3242 static int __init edgeport_init(void) 3243 { 3244 int retval; 3245 3246 retval = usb_serial_register(&edgeport_2port_device); 3247 if (retval) 3248 goto failed_2port_device_register; 3249 retval = usb_serial_register(&edgeport_4port_device); 3250 if (retval) 3251 goto failed_4port_device_register; 3252 retval = usb_serial_register(&edgeport_8port_device); 3253 if (retval) 3254 goto failed_8port_device_register; 3255 retval = usb_serial_register(&epic_device); 3256 if (retval) 3257 goto failed_epic_device_register; 3258 retval = usb_register(&io_driver); 3259 if (retval) 3260 goto failed_usb_register; 3261 atomic_set(&CmdUrbs, 0); 3262 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 3263 DRIVER_DESC "\n"); 3264 return 0; 3265 3266 failed_usb_register: 3267 usb_serial_deregister(&epic_device); 3268 failed_epic_device_register: 3269 usb_serial_deregister(&edgeport_8port_device); 3270 failed_8port_device_register: 3271 usb_serial_deregister(&edgeport_4port_device); 3272 failed_4port_device_register: 3273 usb_serial_deregister(&edgeport_2port_device); 3274 failed_2port_device_register: 3275 return retval; 3276 } 3277 3278 3279 /**************************************************************************** 3280 * edgeport_exit 3281 * Called when the driver is about to be unloaded. 3282 ****************************************************************************/ 3283 static void __exit edgeport_exit (void) 3284 { 3285 usb_deregister(&io_driver); 3286 usb_serial_deregister(&edgeport_2port_device); 3287 usb_serial_deregister(&edgeport_4port_device); 3288 usb_serial_deregister(&edgeport_8port_device); 3289 usb_serial_deregister(&epic_device); 3290 } 3291 3292 module_init(edgeport_init); 3293 module_exit(edgeport_exit); 3294 3295 /* Module information */ 3296 MODULE_AUTHOR(DRIVER_AUTHOR); 3297 MODULE_DESCRIPTION(DRIVER_DESC); 3298 MODULE_LICENSE("GPL"); 3299 MODULE_FIRMWARE("edgeport/boot.fw"); 3300 MODULE_FIRMWARE("edgeport/boot2.fw"); 3301 MODULE_FIRMWARE("edgeport/down.fw"); 3302 MODULE_FIRMWARE("edgeport/down2.fw"); 3303 3304 module_param(debug, bool, S_IRUGO | S_IWUSR); 3305 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3306