1 /* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * Edgeport/4 14 * Edgeport/4t 15 * Edgeport/2 16 * Edgeport/4i 17 * Edgeport/2i 18 * Edgeport/421 19 * Edgeport/21 20 * Rapidport/4 21 * Edgeport/8 22 * Edgeport/2D8 23 * Edgeport/4D8 24 * Edgeport/8i 25 * 26 * For questions or problems with this driver, contact Inside Out 27 * Networks technical support, or Peter Berger <pberger@brimson.com>, 28 * or Al Borchers <alborchers@steinerpoint.com>. 29 * 30 */ 31 32 #include <linux/kernel.h> 33 #include <linux/jiffies.h> 34 #include <linux/errno.h> 35 #include <linux/init.h> 36 #include <linux/slab.h> 37 #include <linux/tty.h> 38 #include <linux/tty_driver.h> 39 #include <linux/tty_flip.h> 40 #include <linux/module.h> 41 #include <linux/spinlock.h> 42 #include <linux/serial.h> 43 #include <linux/ioctl.h> 44 #include <linux/wait.h> 45 #include <linux/firmware.h> 46 #include <linux/ihex.h> 47 #include <linux/uaccess.h> 48 #include <linux/usb.h> 49 #include <linux/usb/serial.h> 50 #include "io_edgeport.h" 51 #include "io_ionsp.h" /* info for the iosp messages */ 52 #include "io_16654.h" /* 16654 UART defines */ 53 54 /* 55 * Version Information 56 */ 57 #define DRIVER_VERSION "v2.7" 58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 59 #define DRIVER_DESC "Edgeport USB Serial Driver" 60 61 #define MAX_NAME_LEN 64 62 63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 66 67 /* receive port state */ 68 enum RXSTATE { 69 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 70 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 73 }; 74 75 76 /* Transmit Fifo 77 * This Transmit queue is an extension of the edgeport Rx buffer. 78 * The maximum amount of data buffered in both the edgeport 79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 80 */ 81 struct TxFifo { 82 unsigned int head; /* index to head pointer (write) */ 83 unsigned int tail; /* index to tail pointer (read) */ 84 unsigned int count; /* Bytes in queue */ 85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 86 unsigned char *fifo; /* allocated Buffer */ 87 }; 88 89 /* This structure holds all of the local port information */ 90 struct edgeport_port { 91 __u16 txCredits; /* our current credits for this port */ 92 __u16 maxTxCredits; /* the max size of the port */ 93 94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 95 struct urb *write_urb; /* write URB for this port */ 96 bool write_in_progress; /* 'true' while a write URB is outstanding */ 97 spinlock_t ep_lock; 98 99 __u8 shadowLCR; /* last LCR value received */ 100 __u8 shadowMCR; /* last MCR value received */ 101 __u8 shadowMSR; /* last MSR value received */ 102 __u8 shadowLSR; /* last LSR value received */ 103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 105 __u8 validDataMask; 106 __u32 baudRate; 107 108 bool open; 109 bool openPending; 110 bool commandPending; 111 bool closePending; 112 bool chaseResponsePending; 113 114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 118 119 struct async_icount icount; 120 struct usb_serial_port *port; /* loop back to the owner of this object */ 121 }; 122 123 124 /* This structure holds all of the individual device information */ 125 struct edgeport_serial { 126 char name[MAX_NAME_LEN+2]; /* string name of this device */ 127 128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 130 struct edgeport_product_info product_info; /* Product Info */ 131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 132 int is_epic; /* flag if EPiC device or not */ 133 134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 136 struct urb *interrupt_read_urb; /* our interrupt urb */ 137 138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 140 struct urb *read_urb; /* our bulk read urb */ 141 bool read_in_progress; 142 spinlock_t es_lock; 143 144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 145 146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 147 148 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 149 __u8 rxHeader1; /* receive header byte 1 */ 150 __u8 rxHeader2; /* receive header byte 2 */ 151 __u8 rxHeader3; /* receive header byte 3 */ 152 __u8 rxPort; /* the port that we are currently receiving data for */ 153 __u8 rxStatusCode; /* the receive status code */ 154 __u8 rxStatusParam; /* the receive status paramater */ 155 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 156 struct usb_serial *serial; /* loop back to the owner of this object */ 157 }; 158 159 /* baud rate information */ 160 struct divisor_table_entry { 161 __u32 BaudRate; 162 __u16 Divisor; 163 }; 164 165 /* 166 * Define table of divisors for Rev A EdgePort/4 hardware 167 * These assume a 3.6864MHz crystal, the standard /16, and 168 * MCR.7 = 0. 169 */ 170 171 static const struct divisor_table_entry divisor_table[] = { 172 { 50, 4608}, 173 { 75, 3072}, 174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 176 { 150, 1536}, 177 { 300, 768}, 178 { 600, 384}, 179 { 1200, 192}, 180 { 1800, 128}, 181 { 2400, 96}, 182 { 4800, 48}, 183 { 7200, 32}, 184 { 9600, 24}, 185 { 14400, 16}, 186 { 19200, 12}, 187 { 38400, 6}, 188 { 57600, 4}, 189 { 115200, 2}, 190 { 230400, 1}, 191 }; 192 193 /* local variables */ 194 static int debug; 195 196 static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */ 197 198 199 /* local function prototypes */ 200 201 /* function prototypes for all URB callbacks */ 202 static void edge_interrupt_callback(struct urb *urb); 203 static void edge_bulk_in_callback(struct urb *urb); 204 static void edge_bulk_out_data_callback(struct urb *urb); 205 static void edge_bulk_out_cmd_callback(struct urb *urb); 206 207 /* function prototypes for the usbserial callbacks */ 208 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); 209 static void edge_close(struct usb_serial_port *port); 210 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 211 const unsigned char *buf, int count); 212 static int edge_write_room(struct tty_struct *tty); 213 static int edge_chars_in_buffer(struct tty_struct *tty); 214 static void edge_throttle(struct tty_struct *tty); 215 static void edge_unthrottle(struct tty_struct *tty); 216 static void edge_set_termios(struct tty_struct *tty, 217 struct usb_serial_port *port, 218 struct ktermios *old_termios); 219 static int edge_ioctl(struct tty_struct *tty, struct file *file, 220 unsigned int cmd, unsigned long arg); 221 static void edge_break(struct tty_struct *tty, int break_state); 222 static int edge_tiocmget(struct tty_struct *tty, struct file *file); 223 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 224 unsigned int set, unsigned int clear); 225 static int edge_startup(struct usb_serial *serial); 226 static void edge_disconnect(struct usb_serial *serial); 227 static void edge_release(struct usb_serial *serial); 228 229 #include "io_tables.h" /* all of the devices that this driver supports */ 230 231 /* function prototypes for all of our local functions */ 232 233 static void process_rcvd_data(struct edgeport_serial *edge_serial, 234 unsigned char *buffer, __u16 bufferLength); 235 static void process_rcvd_status(struct edgeport_serial *edge_serial, 236 __u8 byte2, __u8 byte3); 237 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 238 unsigned char *data, int length); 239 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 240 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 241 __u8 lsr, __u8 data); 242 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 243 __u8 param); 244 static int calc_baud_rate_divisor(int baud_rate, int *divisor); 245 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 246 int baudRate); 247 static void change_port_settings(struct tty_struct *tty, 248 struct edgeport_port *edge_port, 249 struct ktermios *old_termios); 250 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 251 __u8 regNum, __u8 regValue); 252 static int write_cmd_usb(struct edgeport_port *edge_port, 253 unsigned char *buffer, int writeLength); 254 static void send_more_port_data(struct edgeport_serial *edge_serial, 255 struct edgeport_port *edge_port); 256 257 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 258 __u16 length, const __u8 *data); 259 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 260 __u16 length, __u8 *data); 261 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 262 __u16 length, const __u8 *data); 263 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 264 static void get_boot_desc(struct edgeport_serial *edge_serial); 265 static void load_application_firmware(struct edgeport_serial *edge_serial); 266 267 static void unicode_to_ascii(char *string, int buflen, 268 __le16 *unicode, int unicode_size); 269 270 271 /* ************************************************************************ */ 272 /* ************************************************************************ */ 273 /* ************************************************************************ */ 274 /* ************************************************************************ */ 275 276 /************************************************************************ 277 * * 278 * update_edgeport_E2PROM() Compare current versions of * 279 * Boot ROM and Manufacture * 280 * Descriptors with versions * 281 * embedded in this driver * 282 * * 283 ************************************************************************/ 284 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 285 { 286 __u32 BootCurVer; 287 __u32 BootNewVer; 288 __u8 BootMajorVersion; 289 __u8 BootMinorVersion; 290 __u16 BootBuildNumber; 291 __u32 Bootaddr; 292 const struct ihex_binrec *rec; 293 const struct firmware *fw; 294 const char *fw_name; 295 int response; 296 297 switch (edge_serial->product_info.iDownloadFile) { 298 case EDGE_DOWNLOAD_FILE_I930: 299 fw_name = "edgeport/boot.fw"; 300 break; 301 case EDGE_DOWNLOAD_FILE_80251: 302 fw_name = "edgeport/boot2.fw"; 303 break; 304 default: 305 return; 306 } 307 308 response = request_ihex_firmware(&fw, fw_name, 309 &edge_serial->serial->dev->dev); 310 if (response) { 311 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 312 fw_name, response); 313 return; 314 } 315 316 rec = (const struct ihex_binrec *)fw->data; 317 BootMajorVersion = rec->data[0]; 318 BootMinorVersion = rec->data[1]; 319 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 320 321 /* Check Boot Image Version */ 322 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 323 (edge_serial->boot_descriptor.MinorVersion << 16) + 324 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 325 326 BootNewVer = (BootMajorVersion << 24) + 327 (BootMinorVersion << 16) + 328 BootBuildNumber; 329 330 dbg("Current Boot Image version %d.%d.%d", 331 edge_serial->boot_descriptor.MajorVersion, 332 edge_serial->boot_descriptor.MinorVersion, 333 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 334 335 336 if (BootNewVer > BootCurVer) { 337 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 338 edge_serial->boot_descriptor.MajorVersion, 339 edge_serial->boot_descriptor.MinorVersion, 340 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 341 BootMajorVersion, BootMinorVersion, BootBuildNumber); 342 343 dbg("Downloading new Boot Image"); 344 345 for (rec = ihex_next_binrec(rec); rec; 346 rec = ihex_next_binrec(rec)) { 347 Bootaddr = be32_to_cpu(rec->addr); 348 response = rom_write(edge_serial->serial, 349 Bootaddr >> 16, 350 Bootaddr & 0xFFFF, 351 be16_to_cpu(rec->len), 352 &rec->data[0]); 353 if (response < 0) { 354 dev_err(&edge_serial->serial->dev->dev, 355 "rom_write failed (%x, %x, %d)\n", 356 Bootaddr >> 16, Bootaddr & 0xFFFF, 357 be16_to_cpu(rec->len)); 358 break; 359 } 360 } 361 } else { 362 dbg("Boot Image -- already up to date"); 363 } 364 release_firmware(fw); 365 } 366 367 368 /************************************************************************ 369 * * 370 * Get string descriptor from device * 371 * * 372 ************************************************************************/ 373 static int get_string(struct usb_device *dev, int Id, char *string, int buflen) 374 { 375 struct usb_string_descriptor StringDesc; 376 struct usb_string_descriptor *pStringDesc; 377 378 dbg("%s - USB String ID = %d", __func__, Id); 379 380 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, 381 &StringDesc, sizeof(StringDesc))) 382 return 0; 383 384 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 385 if (!pStringDesc) 386 return 0; 387 388 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, 389 pStringDesc, StringDesc.bLength)) { 390 kfree(pStringDesc); 391 return 0; 392 } 393 394 unicode_to_ascii(string, buflen, 395 pStringDesc->wData, pStringDesc->bLength/2); 396 397 kfree(pStringDesc); 398 dbg("%s - USB String %s", __func__, string); 399 return strlen(string); 400 } 401 402 403 #if 0 404 /************************************************************************ 405 * 406 * Get string descriptor from device 407 * 408 ************************************************************************/ 409 static int get_string_desc(struct usb_device *dev, int Id, 410 struct usb_string_descriptor **pRetDesc) 411 { 412 struct usb_string_descriptor StringDesc; 413 struct usb_string_descriptor *pStringDesc; 414 415 dbg("%s - USB String ID = %d", __func__, Id); 416 417 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 418 sizeof(StringDesc))) 419 return 0; 420 421 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 422 if (!pStringDesc) 423 return -1; 424 425 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 426 StringDesc.bLength)) { 427 kfree(pStringDesc); 428 return -1; 429 } 430 431 *pRetDesc = pStringDesc; 432 return 0; 433 } 434 #endif 435 436 static void dump_product_info(struct edgeport_product_info *product_info) 437 { 438 /* Dump Product Info structure */ 439 dbg("**Product Information:"); 440 dbg(" ProductId %x", product_info->ProductId); 441 dbg(" NumPorts %d", product_info->NumPorts); 442 dbg(" ProdInfoVer %d", product_info->ProdInfoVer); 443 dbg(" IsServer %d", product_info->IsServer); 444 dbg(" IsRS232 %d", product_info->IsRS232); 445 dbg(" IsRS422 %d", product_info->IsRS422); 446 dbg(" IsRS485 %d", product_info->IsRS485); 447 dbg(" RomSize %d", product_info->RomSize); 448 dbg(" RamSize %d", product_info->RamSize); 449 dbg(" CpuRev %x", product_info->CpuRev); 450 dbg(" BoardRev %x", product_info->BoardRev); 451 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 452 product_info->BootMinorVersion, 453 le16_to_cpu(product_info->BootBuildNumber)); 454 dbg(" FirmwareMajorVersion %d.%d.%d", 455 product_info->FirmwareMajorVersion, 456 product_info->FirmwareMinorVersion, 457 le16_to_cpu(product_info->FirmwareBuildNumber)); 458 dbg(" ManufactureDescDate %d/%d/%d", 459 product_info->ManufactureDescDate[0], 460 product_info->ManufactureDescDate[1], 461 product_info->ManufactureDescDate[2]+1900); 462 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 463 dbg(" EpicVer %d", product_info->EpicVer); 464 } 465 466 static void get_product_info(struct edgeport_serial *edge_serial) 467 { 468 struct edgeport_product_info *product_info = &edge_serial->product_info; 469 470 memset(product_info, 0, sizeof(struct edgeport_product_info)); 471 472 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 473 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 474 product_info->ProdInfoVer = 0; 475 476 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 477 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 478 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 479 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 480 481 product_info->BootMajorVersion = 482 edge_serial->boot_descriptor.MajorVersion; 483 product_info->BootMinorVersion = 484 edge_serial->boot_descriptor.MinorVersion; 485 product_info->BootBuildNumber = 486 edge_serial->boot_descriptor.BuildNumber; 487 488 memcpy(product_info->ManufactureDescDate, 489 edge_serial->manuf_descriptor.DescDate, 490 sizeof(edge_serial->manuf_descriptor.DescDate)); 491 492 /* check if this is 2nd generation hardware */ 493 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 494 & ION_DEVICE_ID_80251_NETCHIP) 495 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 496 else 497 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 498 499 /* Determine Product type and set appropriate flags */ 500 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 501 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 502 case ION_DEVICE_ID_EDGEPORT_4T: 503 case ION_DEVICE_ID_EDGEPORT_4: 504 case ION_DEVICE_ID_EDGEPORT_2: 505 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 506 case ION_DEVICE_ID_EDGEPORT_8: 507 case ION_DEVICE_ID_EDGEPORT_421: 508 case ION_DEVICE_ID_EDGEPORT_21: 509 case ION_DEVICE_ID_EDGEPORT_2_DIN: 510 case ION_DEVICE_ID_EDGEPORT_4_DIN: 511 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 512 product_info->IsRS232 = 1; 513 break; 514 515 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 516 product_info->IsRS422 = 1; 517 product_info->IsRS485 = 1; 518 break; 519 520 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 521 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 522 product_info->IsRS422 = 1; 523 break; 524 } 525 526 dump_product_info(product_info); 527 } 528 529 static int get_epic_descriptor(struct edgeport_serial *ep) 530 { 531 int result; 532 struct usb_serial *serial = ep->serial; 533 struct edgeport_product_info *product_info = &ep->product_info; 534 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 535 struct edge_compatibility_bits *bits; 536 537 ep->is_epic = 0; 538 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 539 USB_REQUEST_ION_GET_EPIC_DESC, 540 0xC0, 0x00, 0x00, 541 &ep->epic_descriptor, 542 sizeof(struct edge_compatibility_descriptor), 543 300); 544 545 dbg("%s result = %d", __func__, result); 546 547 if (result > 0) { 548 ep->is_epic = 1; 549 memset(product_info, 0, sizeof(struct edgeport_product_info)); 550 551 product_info->NumPorts = epic->NumPorts; 552 product_info->ProdInfoVer = 0; 553 product_info->FirmwareMajorVersion = epic->MajorVersion; 554 product_info->FirmwareMinorVersion = epic->MinorVersion; 555 product_info->FirmwareBuildNumber = epic->BuildNumber; 556 product_info->iDownloadFile = epic->iDownloadFile; 557 product_info->EpicVer = epic->EpicVer; 558 product_info->Epic = epic->Supports; 559 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 560 dump_product_info(product_info); 561 562 bits = &ep->epic_descriptor.Supports; 563 dbg("**EPIC descriptor:"); 564 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE"); 565 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE"); 566 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE"); 567 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE"); 568 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 569 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 570 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE"); 571 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE"); 572 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 573 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 574 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 575 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 576 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE"); 577 } 578 579 return result; 580 } 581 582 583 /************************************************************************/ 584 /************************************************************************/ 585 /* U S B C A L L B A C K F U N C T I O N S */ 586 /* U S B C A L L B A C K F U N C T I O N S */ 587 /************************************************************************/ 588 /************************************************************************/ 589 590 /***************************************************************************** 591 * edge_interrupt_callback 592 * this is the callback function for when we have received data on the 593 * interrupt endpoint. 594 *****************************************************************************/ 595 static void edge_interrupt_callback(struct urb *urb) 596 { 597 struct edgeport_serial *edge_serial = urb->context; 598 struct edgeport_port *edge_port; 599 struct usb_serial_port *port; 600 struct tty_struct *tty; 601 unsigned char *data = urb->transfer_buffer; 602 int length = urb->actual_length; 603 int bytes_avail; 604 int position; 605 int txCredits; 606 int portNumber; 607 int result; 608 int status = urb->status; 609 610 dbg("%s", __func__); 611 612 switch (status) { 613 case 0: 614 /* success */ 615 break; 616 case -ECONNRESET: 617 case -ENOENT: 618 case -ESHUTDOWN: 619 /* this urb is terminated, clean up */ 620 dbg("%s - urb shutting down with status: %d", 621 __func__, status); 622 return; 623 default: 624 dbg("%s - nonzero urb status received: %d", __func__, status); 625 goto exit; 626 } 627 628 /* process this interrupt-read even if there are no ports open */ 629 if (length) { 630 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 631 __func__, length, data); 632 633 if (length > 1) { 634 bytes_avail = data[0] | (data[1] << 8); 635 if (bytes_avail) { 636 spin_lock(&edge_serial->es_lock); 637 edge_serial->rxBytesAvail += bytes_avail; 638 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 639 640 if (edge_serial->rxBytesAvail > 0 && 641 !edge_serial->read_in_progress) { 642 dbg("%s - posting a read", __func__); 643 edge_serial->read_in_progress = true; 644 645 /* we have pending bytes on the 646 bulk in pipe, send a request */ 647 edge_serial->read_urb->dev = edge_serial->serial->dev; 648 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 649 if (result) { 650 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result); 651 edge_serial->read_in_progress = false; 652 } 653 } 654 spin_unlock(&edge_serial->es_lock); 655 } 656 } 657 /* grab the txcredits for the ports if available */ 658 position = 2; 659 portNumber = 0; 660 while ((position < length) && 661 (portNumber < edge_serial->serial->num_ports)) { 662 txCredits = data[position] | (data[position+1] << 8); 663 if (txCredits) { 664 port = edge_serial->serial->port[portNumber]; 665 edge_port = usb_get_serial_port_data(port); 666 if (edge_port->open) { 667 spin_lock(&edge_port->ep_lock); 668 edge_port->txCredits += txCredits; 669 spin_unlock(&edge_port->ep_lock); 670 dbg("%s - txcredits for port%d = %d", 671 __func__, portNumber, 672 edge_port->txCredits); 673 674 /* tell the tty driver that something 675 has changed */ 676 tty = tty_port_tty_get( 677 &edge_port->port->port); 678 if (tty) { 679 tty_wakeup(tty); 680 tty_kref_put(tty); 681 } 682 /* Since we have more credit, check 683 if more data can be sent */ 684 send_more_port_data(edge_serial, 685 edge_port); 686 } 687 } 688 position += 2; 689 ++portNumber; 690 } 691 } 692 693 exit: 694 result = usb_submit_urb(urb, GFP_ATOMIC); 695 if (result) 696 dev_err(&urb->dev->dev, 697 "%s - Error %d submitting control urb\n", 698 __func__, result); 699 } 700 701 702 /***************************************************************************** 703 * edge_bulk_in_callback 704 * this is the callback function for when we have received data on the 705 * bulk in endpoint. 706 *****************************************************************************/ 707 static void edge_bulk_in_callback(struct urb *urb) 708 { 709 struct edgeport_serial *edge_serial = urb->context; 710 unsigned char *data = urb->transfer_buffer; 711 int retval; 712 __u16 raw_data_length; 713 int status = urb->status; 714 715 dbg("%s", __func__); 716 717 if (status) { 718 dbg("%s - nonzero read bulk status received: %d", 719 __func__, status); 720 edge_serial->read_in_progress = false; 721 return; 722 } 723 724 if (urb->actual_length == 0) { 725 dbg("%s - read bulk callback with no data", __func__); 726 edge_serial->read_in_progress = false; 727 return; 728 } 729 730 raw_data_length = urb->actual_length; 731 732 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 733 __func__, raw_data_length, data); 734 735 spin_lock(&edge_serial->es_lock); 736 737 /* decrement our rxBytes available by the number that we just got */ 738 edge_serial->rxBytesAvail -= raw_data_length; 739 740 dbg("%s - Received = %d, rxBytesAvail %d", __func__, 741 raw_data_length, edge_serial->rxBytesAvail); 742 743 process_rcvd_data(edge_serial, data, urb->actual_length); 744 745 /* check to see if there's any more data for us to read */ 746 if (edge_serial->rxBytesAvail > 0) { 747 dbg("%s - posting a read", __func__); 748 edge_serial->read_urb->dev = edge_serial->serial->dev; 749 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 750 if (retval) { 751 dev_err(&urb->dev->dev, 752 "%s - usb_submit_urb(read bulk) failed, " 753 "retval = %d\n", __func__, retval); 754 edge_serial->read_in_progress = false; 755 } 756 } else { 757 edge_serial->read_in_progress = false; 758 } 759 760 spin_unlock(&edge_serial->es_lock); 761 } 762 763 764 /***************************************************************************** 765 * edge_bulk_out_data_callback 766 * this is the callback function for when we have finished sending 767 * serial data on the bulk out endpoint. 768 *****************************************************************************/ 769 static void edge_bulk_out_data_callback(struct urb *urb) 770 { 771 struct edgeport_port *edge_port = urb->context; 772 struct tty_struct *tty; 773 int status = urb->status; 774 775 dbg("%s", __func__); 776 777 if (status) { 778 dbg("%s - nonzero write bulk status received: %d", 779 __func__, status); 780 } 781 782 tty = tty_port_tty_get(&edge_port->port->port); 783 784 if (tty && edge_port->open) { 785 /* let the tty driver wakeup if it has a special 786 write_wakeup function */ 787 tty_wakeup(tty); 788 } 789 tty_kref_put(tty); 790 791 /* Release the Write URB */ 792 edge_port->write_in_progress = false; 793 794 /* Check if more data needs to be sent */ 795 send_more_port_data((struct edgeport_serial *) 796 (usb_get_serial_data(edge_port->port->serial)), edge_port); 797 } 798 799 800 /***************************************************************************** 801 * BulkOutCmdCallback 802 * this is the callback function for when we have finished sending a 803 * command on the bulk out endpoint. 804 *****************************************************************************/ 805 static void edge_bulk_out_cmd_callback(struct urb *urb) 806 { 807 struct edgeport_port *edge_port = urb->context; 808 struct tty_struct *tty; 809 int status = urb->status; 810 811 dbg("%s", __func__); 812 813 atomic_dec(&CmdUrbs); 814 dbg("%s - FREE URB %p (outstanding %d)", __func__, 815 urb, atomic_read(&CmdUrbs)); 816 817 818 /* clean up the transfer buffer */ 819 kfree(urb->transfer_buffer); 820 821 /* Free the command urb */ 822 usb_free_urb(urb); 823 824 if (status) { 825 dbg("%s - nonzero write bulk status received: %d", 826 __func__, status); 827 return; 828 } 829 830 /* Get pointer to tty */ 831 tty = tty_port_tty_get(&edge_port->port->port); 832 833 /* tell the tty driver that something has changed */ 834 if (tty && edge_port->open) 835 tty_wakeup(tty); 836 tty_kref_put(tty); 837 838 /* we have completed the command */ 839 edge_port->commandPending = false; 840 wake_up(&edge_port->wait_command); 841 } 842 843 844 /***************************************************************************** 845 * Driver tty interface functions 846 *****************************************************************************/ 847 848 /***************************************************************************** 849 * SerialOpen 850 * this function is called by the tty driver when a port is opened 851 * If successful, we return 0 852 * Otherwise we return a negative error number. 853 *****************************************************************************/ 854 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 855 { 856 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 857 struct usb_serial *serial; 858 struct edgeport_serial *edge_serial; 859 int response; 860 861 dbg("%s - port %d", __func__, port->number); 862 863 if (edge_port == NULL) 864 return -ENODEV; 865 866 /* see if we've set up our endpoint info yet (can't set it up 867 in edge_startup as the structures were not set up at that time.) */ 868 serial = port->serial; 869 edge_serial = usb_get_serial_data(serial); 870 if (edge_serial == NULL) 871 return -ENODEV; 872 if (edge_serial->interrupt_in_buffer == NULL) { 873 struct usb_serial_port *port0 = serial->port[0]; 874 875 /* not set up yet, so do it now */ 876 edge_serial->interrupt_in_buffer = 877 port0->interrupt_in_buffer; 878 edge_serial->interrupt_in_endpoint = 879 port0->interrupt_in_endpointAddress; 880 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 881 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 882 edge_serial->bulk_in_endpoint = 883 port0->bulk_in_endpointAddress; 884 edge_serial->read_urb = port0->read_urb; 885 edge_serial->bulk_out_endpoint = 886 port0->bulk_out_endpointAddress; 887 888 /* set up our interrupt urb */ 889 usb_fill_int_urb(edge_serial->interrupt_read_urb, 890 serial->dev, 891 usb_rcvintpipe(serial->dev, 892 port0->interrupt_in_endpointAddress), 893 port0->interrupt_in_buffer, 894 edge_serial->interrupt_read_urb->transfer_buffer_length, 895 edge_interrupt_callback, edge_serial, 896 edge_serial->interrupt_read_urb->interval); 897 898 /* set up our bulk in urb */ 899 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 900 usb_rcvbulkpipe(serial->dev, 901 port0->bulk_in_endpointAddress), 902 port0->bulk_in_buffer, 903 edge_serial->read_urb->transfer_buffer_length, 904 edge_bulk_in_callback, edge_serial); 905 edge_serial->read_in_progress = false; 906 907 /* start interrupt read for this edgeport 908 * this interrupt will continue as long 909 * as the edgeport is connected */ 910 response = usb_submit_urb(edge_serial->interrupt_read_urb, 911 GFP_KERNEL); 912 if (response) { 913 dev_err(&port->dev, 914 "%s - Error %d submitting control urb\n", 915 __func__, response); 916 } 917 } 918 919 /* initialize our wait queues */ 920 init_waitqueue_head(&edge_port->wait_open); 921 init_waitqueue_head(&edge_port->wait_chase); 922 init_waitqueue_head(&edge_port->delta_msr_wait); 923 init_waitqueue_head(&edge_port->wait_command); 924 925 /* initialize our icount structure */ 926 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 927 928 /* initialize our port settings */ 929 edge_port->txCredits = 0; /* Can't send any data yet */ 930 /* Must always set this bit to enable ints! */ 931 edge_port->shadowMCR = MCR_MASTER_IE; 932 edge_port->chaseResponsePending = false; 933 934 /* send a open port command */ 935 edge_port->openPending = true; 936 edge_port->open = false; 937 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); 938 939 if (response < 0) { 940 dev_err(&port->dev, "%s - error sending open port command\n", 941 __func__); 942 edge_port->openPending = false; 943 return -ENODEV; 944 } 945 946 /* now wait for the port to be completely opened */ 947 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 948 OPEN_TIMEOUT); 949 950 if (!edge_port->open) { 951 /* open timed out */ 952 dbg("%s - open timedout", __func__); 953 edge_port->openPending = false; 954 return -ENODEV; 955 } 956 957 /* create the txfifo */ 958 edge_port->txfifo.head = 0; 959 edge_port->txfifo.tail = 0; 960 edge_port->txfifo.count = 0; 961 edge_port->txfifo.size = edge_port->maxTxCredits; 962 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 963 964 if (!edge_port->txfifo.fifo) { 965 dbg("%s - no memory", __func__); 966 edge_close(port); 967 return -ENOMEM; 968 } 969 970 /* Allocate a URB for the write */ 971 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 972 edge_port->write_in_progress = false; 973 974 if (!edge_port->write_urb) { 975 dbg("%s - no memory", __func__); 976 edge_close(port); 977 return -ENOMEM; 978 } 979 980 dbg("%s(%d) - Initialize TX fifo to %d bytes", 981 __func__, port->number, edge_port->maxTxCredits); 982 983 dbg("%s exited", __func__); 984 985 return 0; 986 } 987 988 989 /************************************************************************ 990 * 991 * block_until_chase_response 992 * 993 * This function will block the close until one of the following: 994 * 1. Response to our Chase comes from Edgeport 995 * 2. A timeout of 10 seconds without activity has expired 996 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 997 * 998 ************************************************************************/ 999 static void block_until_chase_response(struct edgeport_port *edge_port) 1000 { 1001 DEFINE_WAIT(wait); 1002 __u16 lastCredits; 1003 int timeout = 1*HZ; 1004 int loop = 10; 1005 1006 while (1) { 1007 /* Save Last credits */ 1008 lastCredits = edge_port->txCredits; 1009 1010 /* Did we get our Chase response */ 1011 if (!edge_port->chaseResponsePending) { 1012 dbg("%s - Got Chase Response", __func__); 1013 1014 /* did we get all of our credit back? */ 1015 if (edge_port->txCredits == edge_port->maxTxCredits) { 1016 dbg("%s - Got all credits", __func__); 1017 return; 1018 } 1019 } 1020 1021 /* Block the thread for a while */ 1022 prepare_to_wait(&edge_port->wait_chase, &wait, 1023 TASK_UNINTERRUPTIBLE); 1024 schedule_timeout(timeout); 1025 finish_wait(&edge_port->wait_chase, &wait); 1026 1027 if (lastCredits == edge_port->txCredits) { 1028 /* No activity.. count down. */ 1029 loop--; 1030 if (loop == 0) { 1031 edge_port->chaseResponsePending = false; 1032 dbg("%s - Chase TIMEOUT", __func__); 1033 return; 1034 } 1035 } else { 1036 /* Reset timeout value back to 10 seconds */ 1037 dbg("%s - Last %d, Current %d", __func__, 1038 lastCredits, edge_port->txCredits); 1039 loop = 10; 1040 } 1041 } 1042 } 1043 1044 1045 /************************************************************************ 1046 * 1047 * block_until_tx_empty 1048 * 1049 * This function will block the close until one of the following: 1050 * 1. TX count are 0 1051 * 2. The edgeport has stopped 1052 * 3. A timeout of 3 seconds without activity has expired 1053 * 1054 ************************************************************************/ 1055 static void block_until_tx_empty(struct edgeport_port *edge_port) 1056 { 1057 DEFINE_WAIT(wait); 1058 struct TxFifo *fifo = &edge_port->txfifo; 1059 __u32 lastCount; 1060 int timeout = HZ/10; 1061 int loop = 30; 1062 1063 while (1) { 1064 /* Save Last count */ 1065 lastCount = fifo->count; 1066 1067 /* Is the Edgeport Buffer empty? */ 1068 if (lastCount == 0) { 1069 dbg("%s - TX Buffer Empty", __func__); 1070 return; 1071 } 1072 1073 /* Block the thread for a while */ 1074 prepare_to_wait(&edge_port->wait_chase, &wait, 1075 TASK_UNINTERRUPTIBLE); 1076 schedule_timeout(timeout); 1077 finish_wait(&edge_port->wait_chase, &wait); 1078 1079 dbg("%s wait", __func__); 1080 1081 if (lastCount == fifo->count) { 1082 /* No activity.. count down. */ 1083 loop--; 1084 if (loop == 0) { 1085 dbg("%s - TIMEOUT", __func__); 1086 return; 1087 } 1088 } else { 1089 /* Reset timeout value back to seconds */ 1090 loop = 30; 1091 } 1092 } 1093 } 1094 1095 1096 /***************************************************************************** 1097 * edge_close 1098 * this function is called by the tty driver when a port is closed 1099 *****************************************************************************/ 1100 static void edge_close(struct usb_serial_port *port) 1101 { 1102 struct edgeport_serial *edge_serial; 1103 struct edgeport_port *edge_port; 1104 int status; 1105 1106 dbg("%s - port %d", __func__, port->number); 1107 1108 edge_serial = usb_get_serial_data(port->serial); 1109 edge_port = usb_get_serial_port_data(port); 1110 if (edge_serial == NULL || edge_port == NULL) 1111 return; 1112 1113 /* block until tx is empty */ 1114 block_until_tx_empty(edge_port); 1115 1116 edge_port->closePending = true; 1117 1118 if ((!edge_serial->is_epic) || 1119 ((edge_serial->is_epic) && 1120 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1121 /* flush and chase */ 1122 edge_port->chaseResponsePending = true; 1123 1124 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1125 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1126 if (status == 0) 1127 /* block until chase finished */ 1128 block_until_chase_response(edge_port); 1129 else 1130 edge_port->chaseResponsePending = false; 1131 } 1132 1133 if ((!edge_serial->is_epic) || 1134 ((edge_serial->is_epic) && 1135 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1136 /* close the port */ 1137 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__); 1138 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1139 } 1140 1141 /* port->close = true; */ 1142 edge_port->closePending = false; 1143 edge_port->open = false; 1144 edge_port->openPending = false; 1145 1146 usb_kill_urb(edge_port->write_urb); 1147 1148 if (edge_port->write_urb) { 1149 /* if this urb had a transfer buffer already 1150 (old transfer) free it */ 1151 kfree(edge_port->write_urb->transfer_buffer); 1152 usb_free_urb(edge_port->write_urb); 1153 edge_port->write_urb = NULL; 1154 } 1155 kfree(edge_port->txfifo.fifo); 1156 edge_port->txfifo.fifo = NULL; 1157 1158 dbg("%s exited", __func__); 1159 } 1160 1161 /***************************************************************************** 1162 * SerialWrite 1163 * this function is called by the tty driver when data should be written 1164 * to the port. 1165 * If successful, we return the number of bytes written, otherwise we 1166 * return a negative error number. 1167 *****************************************************************************/ 1168 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1169 const unsigned char *data, int count) 1170 { 1171 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1172 struct TxFifo *fifo; 1173 int copySize; 1174 int bytesleft; 1175 int firsthalf; 1176 int secondhalf; 1177 unsigned long flags; 1178 1179 dbg("%s - port %d", __func__, port->number); 1180 1181 if (edge_port == NULL) 1182 return -ENODEV; 1183 1184 /* get a pointer to the Tx fifo */ 1185 fifo = &edge_port->txfifo; 1186 1187 spin_lock_irqsave(&edge_port->ep_lock, flags); 1188 1189 /* calculate number of bytes to put in fifo */ 1190 copySize = min((unsigned int)count, 1191 (edge_port->txCredits - fifo->count)); 1192 1193 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", 1194 __func__, port->number, count, 1195 edge_port->txCredits - fifo->count, copySize); 1196 1197 /* catch writes of 0 bytes which the tty driver likes to give us, 1198 and when txCredits is empty */ 1199 if (copySize == 0) { 1200 dbg("%s - copySize = Zero", __func__); 1201 goto finish_write; 1202 } 1203 1204 /* queue the data 1205 * since we can never overflow the buffer we do not have to check for a 1206 * full condition 1207 * 1208 * the copy is done is two parts -- first fill to the end of the buffer 1209 * then copy the reset from the start of the buffer 1210 */ 1211 bytesleft = fifo->size - fifo->head; 1212 firsthalf = min(bytesleft, copySize); 1213 dbg("%s - copy %d bytes of %d into fifo ", __func__, 1214 firsthalf, bytesleft); 1215 1216 /* now copy our data */ 1217 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1218 usb_serial_debug_data(debug, &port->dev, __func__, 1219 firsthalf, &fifo->fifo[fifo->head]); 1220 1221 /* update the index and size */ 1222 fifo->head += firsthalf; 1223 fifo->count += firsthalf; 1224 1225 /* wrap the index */ 1226 if (fifo->head == fifo->size) 1227 fifo->head = 0; 1228 1229 secondhalf = copySize-firsthalf; 1230 1231 if (secondhalf) { 1232 dbg("%s - copy rest of data %d", __func__, secondhalf); 1233 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1234 usb_serial_debug_data(debug, &port->dev, __func__, 1235 secondhalf, &fifo->fifo[fifo->head]); 1236 /* update the index and size */ 1237 fifo->count += secondhalf; 1238 fifo->head += secondhalf; 1239 /* No need to check for wrap since we can not get to end of 1240 * the fifo in this part 1241 */ 1242 } 1243 1244 finish_write: 1245 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1246 1247 send_more_port_data((struct edgeport_serial *) 1248 usb_get_serial_data(port->serial), edge_port); 1249 1250 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__, 1251 copySize, edge_port->txCredits, fifo->count); 1252 1253 return copySize; 1254 } 1255 1256 1257 /************************************************************************ 1258 * 1259 * send_more_port_data() 1260 * 1261 * This routine attempts to write additional UART transmit data 1262 * to a port over the USB bulk pipe. It is called (1) when new 1263 * data has been written to a port's TxBuffer from higher layers 1264 * (2) when the peripheral sends us additional TxCredits indicating 1265 * that it can accept more Tx data for a given port; and (3) when 1266 * a bulk write completes successfully and we want to see if we 1267 * can transmit more. 1268 * 1269 ************************************************************************/ 1270 static void send_more_port_data(struct edgeport_serial *edge_serial, 1271 struct edgeport_port *edge_port) 1272 { 1273 struct TxFifo *fifo = &edge_port->txfifo; 1274 struct urb *urb; 1275 unsigned char *buffer; 1276 int status; 1277 int count; 1278 int bytesleft; 1279 int firsthalf; 1280 int secondhalf; 1281 unsigned long flags; 1282 1283 dbg("%s(%d)", __func__, edge_port->port->number); 1284 1285 spin_lock_irqsave(&edge_port->ep_lock, flags); 1286 1287 if (edge_port->write_in_progress || 1288 !edge_port->open || 1289 (fifo->count == 0)) { 1290 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", 1291 __func__, edge_port->port->number, 1292 fifo->count, edge_port->write_in_progress); 1293 goto exit_send; 1294 } 1295 1296 /* since the amount of data in the fifo will always fit into the 1297 * edgeport buffer we do not need to check the write length 1298 * 1299 * Do we have enough credits for this port to make it worthwhile 1300 * to bother queueing a write. If it's too small, say a few bytes, 1301 * it's better to wait for more credits so we can do a larger write. 1302 */ 1303 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1304 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", 1305 __func__, edge_port->port->number, fifo->count, 1306 edge_port->txCredits); 1307 goto exit_send; 1308 } 1309 1310 /* lock this write */ 1311 edge_port->write_in_progress = true; 1312 1313 /* get a pointer to the write_urb */ 1314 urb = edge_port->write_urb; 1315 1316 /* make sure transfer buffer is freed */ 1317 kfree(urb->transfer_buffer); 1318 urb->transfer_buffer = NULL; 1319 1320 /* build the data header for the buffer and port that we are about 1321 to send out */ 1322 count = fifo->count; 1323 buffer = kmalloc(count+2, GFP_ATOMIC); 1324 if (buffer == NULL) { 1325 dev_err(&edge_port->port->dev, 1326 "%s - no more kernel memory...\n", __func__); 1327 edge_port->write_in_progress = false; 1328 goto exit_send; 1329 } 1330 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number 1331 - edge_port->port->serial->minor, count); 1332 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number 1333 - edge_port->port->serial->minor, count); 1334 1335 /* now copy our data */ 1336 bytesleft = fifo->size - fifo->tail; 1337 firsthalf = min(bytesleft, count); 1338 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1339 fifo->tail += firsthalf; 1340 fifo->count -= firsthalf; 1341 if (fifo->tail == fifo->size) 1342 fifo->tail = 0; 1343 1344 secondhalf = count-firsthalf; 1345 if (secondhalf) { 1346 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1347 secondhalf); 1348 fifo->tail += secondhalf; 1349 fifo->count -= secondhalf; 1350 } 1351 1352 if (count) 1353 usb_serial_debug_data(debug, &edge_port->port->dev, 1354 __func__, count, &buffer[2]); 1355 1356 /* fill up the urb with all of our data and submit it */ 1357 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1358 usb_sndbulkpipe(edge_serial->serial->dev, 1359 edge_serial->bulk_out_endpoint), 1360 buffer, count+2, 1361 edge_bulk_out_data_callback, edge_port); 1362 1363 /* decrement the number of credits we have by the number we just sent */ 1364 edge_port->txCredits -= count; 1365 edge_port->icount.tx += count; 1366 1367 urb->dev = edge_serial->serial->dev; 1368 status = usb_submit_urb(urb, GFP_ATOMIC); 1369 if (status) { 1370 /* something went wrong */ 1371 dev_err(&edge_port->port->dev, 1372 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1373 __func__, status); 1374 edge_port->write_in_progress = false; 1375 1376 /* revert the credits as something bad happened. */ 1377 edge_port->txCredits += count; 1378 edge_port->icount.tx -= count; 1379 } 1380 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", 1381 __func__, count, edge_port->txCredits, fifo->count); 1382 1383 exit_send: 1384 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1385 } 1386 1387 1388 /***************************************************************************** 1389 * edge_write_room 1390 * this function is called by the tty driver when it wants to know how 1391 * many bytes of data we can accept for a specific port. If successful, 1392 * we return the amount of room that we have for this port (the txCredits) 1393 * otherwise we return a negative error number. 1394 *****************************************************************************/ 1395 static int edge_write_room(struct tty_struct *tty) 1396 { 1397 struct usb_serial_port *port = tty->driver_data; 1398 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1399 int room; 1400 unsigned long flags; 1401 1402 dbg("%s", __func__); 1403 1404 if (edge_port == NULL) 1405 return 0; 1406 if (edge_port->closePending) 1407 return 0; 1408 1409 dbg("%s - port %d", __func__, port->number); 1410 1411 if (!edge_port->open) { 1412 dbg("%s - port not opened", __func__); 1413 return 0; 1414 } 1415 1416 /* total of both buffers is still txCredit */ 1417 spin_lock_irqsave(&edge_port->ep_lock, flags); 1418 room = edge_port->txCredits - edge_port->txfifo.count; 1419 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1420 1421 dbg("%s - returns %d", __func__, room); 1422 return room; 1423 } 1424 1425 1426 /***************************************************************************** 1427 * edge_chars_in_buffer 1428 * this function is called by the tty driver when it wants to know how 1429 * many bytes of data we currently have outstanding in the port (data that 1430 * has been written, but hasn't made it out the port yet) 1431 * If successful, we return the number of bytes left to be written in the 1432 * system, 1433 * Otherwise we return a negative error number. 1434 *****************************************************************************/ 1435 static int edge_chars_in_buffer(struct tty_struct *tty) 1436 { 1437 struct usb_serial_port *port = tty->driver_data; 1438 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1439 int num_chars; 1440 unsigned long flags; 1441 1442 dbg("%s", __func__); 1443 1444 if (edge_port == NULL) 1445 return 0; 1446 if (edge_port->closePending) 1447 return 0; 1448 1449 if (!edge_port->open) { 1450 dbg("%s - port not opened", __func__); 1451 return 0; 1452 } 1453 1454 spin_lock_irqsave(&edge_port->ep_lock, flags); 1455 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1456 edge_port->txfifo.count; 1457 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1458 if (num_chars) { 1459 dbg("%s(port %d) - returns %d", __func__, 1460 port->number, num_chars); 1461 } 1462 1463 return num_chars; 1464 } 1465 1466 1467 /***************************************************************************** 1468 * SerialThrottle 1469 * this function is called by the tty driver when it wants to stop the data 1470 * being read from the port. 1471 *****************************************************************************/ 1472 static void edge_throttle(struct tty_struct *tty) 1473 { 1474 struct usb_serial_port *port = tty->driver_data; 1475 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1476 int status; 1477 1478 dbg("%s - port %d", __func__, port->number); 1479 1480 if (edge_port == NULL) 1481 return; 1482 1483 if (!edge_port->open) { 1484 dbg("%s - port not opened", __func__); 1485 return; 1486 } 1487 1488 /* if we are implementing XON/XOFF, send the stop character */ 1489 if (I_IXOFF(tty)) { 1490 unsigned char stop_char = STOP_CHAR(tty); 1491 status = edge_write(tty, port, &stop_char, 1); 1492 if (status <= 0) 1493 return; 1494 } 1495 1496 /* if we are implementing RTS/CTS, toggle that line */ 1497 if (tty->termios->c_cflag & CRTSCTS) { 1498 edge_port->shadowMCR &= ~MCR_RTS; 1499 status = send_cmd_write_uart_register(edge_port, MCR, 1500 edge_port->shadowMCR); 1501 if (status != 0) 1502 return; 1503 } 1504 1505 return; 1506 } 1507 1508 1509 /***************************************************************************** 1510 * edge_unthrottle 1511 * this function is called by the tty driver when it wants to resume the 1512 * data being read from the port (called after SerialThrottle is called) 1513 *****************************************************************************/ 1514 static void edge_unthrottle(struct tty_struct *tty) 1515 { 1516 struct usb_serial_port *port = tty->driver_data; 1517 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1518 int status; 1519 1520 dbg("%s - port %d", __func__, port->number); 1521 1522 if (edge_port == NULL) 1523 return; 1524 1525 if (!edge_port->open) { 1526 dbg("%s - port not opened", __func__); 1527 return; 1528 } 1529 1530 /* if we are implementing XON/XOFF, send the start character */ 1531 if (I_IXOFF(tty)) { 1532 unsigned char start_char = START_CHAR(tty); 1533 status = edge_write(tty, port, &start_char, 1); 1534 if (status <= 0) 1535 return; 1536 } 1537 /* if we are implementing RTS/CTS, toggle that line */ 1538 if (tty->termios->c_cflag & CRTSCTS) { 1539 edge_port->shadowMCR |= MCR_RTS; 1540 send_cmd_write_uart_register(edge_port, MCR, 1541 edge_port->shadowMCR); 1542 } 1543 } 1544 1545 1546 /***************************************************************************** 1547 * SerialSetTermios 1548 * this function is called by the tty driver when it wants to change 1549 * the termios structure 1550 *****************************************************************************/ 1551 static void edge_set_termios(struct tty_struct *tty, 1552 struct usb_serial_port *port, struct ktermios *old_termios) 1553 { 1554 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1555 unsigned int cflag; 1556 1557 cflag = tty->termios->c_cflag; 1558 dbg("%s - clfag %08x iflag %08x", __func__, 1559 tty->termios->c_cflag, tty->termios->c_iflag); 1560 dbg("%s - old clfag %08x old iflag %08x", __func__, 1561 old_termios->c_cflag, old_termios->c_iflag); 1562 1563 dbg("%s - port %d", __func__, port->number); 1564 1565 if (edge_port == NULL) 1566 return; 1567 1568 if (!edge_port->open) { 1569 dbg("%s - port not opened", __func__); 1570 return; 1571 } 1572 1573 /* change the port settings to the new ones specified */ 1574 change_port_settings(tty, edge_port, old_termios); 1575 } 1576 1577 1578 /***************************************************************************** 1579 * get_lsr_info - get line status register info 1580 * 1581 * Purpose: Let user call ioctl() to get info when the UART physically 1582 * is emptied. On bus types like RS485, the transmitter must 1583 * release the bus after transmitting. This must be done when 1584 * the transmit shift register is empty, not be done when the 1585 * transmit holding register is empty. This functionality 1586 * allows an RS485 driver to be written in user space. 1587 *****************************************************************************/ 1588 static int get_lsr_info(struct edgeport_port *edge_port, 1589 unsigned int __user *value) 1590 { 1591 unsigned int result = 0; 1592 unsigned long flags; 1593 1594 spin_lock_irqsave(&edge_port->ep_lock, flags); 1595 if (edge_port->maxTxCredits == edge_port->txCredits && 1596 edge_port->txfifo.count == 0) { 1597 dbg("%s -- Empty", __func__); 1598 result = TIOCSER_TEMT; 1599 } 1600 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1601 1602 if (copy_to_user(value, &result, sizeof(int))) 1603 return -EFAULT; 1604 return 0; 1605 } 1606 1607 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 1608 unsigned int set, unsigned int clear) 1609 { 1610 struct usb_serial_port *port = tty->driver_data; 1611 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1612 unsigned int mcr; 1613 1614 dbg("%s - port %d", __func__, port->number); 1615 1616 mcr = edge_port->shadowMCR; 1617 if (set & TIOCM_RTS) 1618 mcr |= MCR_RTS; 1619 if (set & TIOCM_DTR) 1620 mcr |= MCR_DTR; 1621 if (set & TIOCM_LOOP) 1622 mcr |= MCR_LOOPBACK; 1623 1624 if (clear & TIOCM_RTS) 1625 mcr &= ~MCR_RTS; 1626 if (clear & TIOCM_DTR) 1627 mcr &= ~MCR_DTR; 1628 if (clear & TIOCM_LOOP) 1629 mcr &= ~MCR_LOOPBACK; 1630 1631 edge_port->shadowMCR = mcr; 1632 1633 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1634 1635 return 0; 1636 } 1637 1638 static int edge_tiocmget(struct tty_struct *tty, struct file *file) 1639 { 1640 struct usb_serial_port *port = tty->driver_data; 1641 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1642 unsigned int result = 0; 1643 unsigned int msr; 1644 unsigned int mcr; 1645 1646 dbg("%s - port %d", __func__, port->number); 1647 1648 msr = edge_port->shadowMSR; 1649 mcr = edge_port->shadowMCR; 1650 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1651 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1652 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1653 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1654 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1655 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1656 1657 1658 dbg("%s -- %x", __func__, result); 1659 1660 return result; 1661 } 1662 1663 static int get_serial_info(struct edgeport_port *edge_port, 1664 struct serial_struct __user *retinfo) 1665 { 1666 struct serial_struct tmp; 1667 1668 if (!retinfo) 1669 return -EFAULT; 1670 1671 memset(&tmp, 0, sizeof(tmp)); 1672 1673 tmp.type = PORT_16550A; 1674 tmp.line = edge_port->port->serial->minor; 1675 tmp.port = edge_port->port->number; 1676 tmp.irq = 0; 1677 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1678 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1679 tmp.baud_base = 9600; 1680 tmp.close_delay = 5*HZ; 1681 tmp.closing_wait = 30*HZ; 1682 1683 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1684 return -EFAULT; 1685 return 0; 1686 } 1687 1688 1689 1690 /***************************************************************************** 1691 * SerialIoctl 1692 * this function handles any ioctl calls to the driver 1693 *****************************************************************************/ 1694 static int edge_ioctl(struct tty_struct *tty, struct file *file, 1695 unsigned int cmd, unsigned long arg) 1696 { 1697 struct usb_serial_port *port = tty->driver_data; 1698 DEFINE_WAIT(wait); 1699 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1700 struct async_icount cnow; 1701 struct async_icount cprev; 1702 struct serial_icounter_struct icount; 1703 1704 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 1705 1706 switch (cmd) { 1707 case TIOCSERGETLSR: 1708 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 1709 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1710 1711 case TIOCGSERIAL: 1712 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 1713 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1714 1715 case TIOCMIWAIT: 1716 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 1717 cprev = edge_port->icount; 1718 while (1) { 1719 prepare_to_wait(&edge_port->delta_msr_wait, 1720 &wait, TASK_INTERRUPTIBLE); 1721 schedule(); 1722 finish_wait(&edge_port->delta_msr_wait, &wait); 1723 /* see if a signal did it */ 1724 if (signal_pending(current)) 1725 return -ERESTARTSYS; 1726 cnow = edge_port->icount; 1727 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1728 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1729 return -EIO; /* no change => error */ 1730 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1731 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1732 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1733 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 1734 return 0; 1735 } 1736 cprev = cnow; 1737 } 1738 /* NOTREACHED */ 1739 break; 1740 1741 case TIOCGICOUNT: 1742 cnow = edge_port->icount; 1743 memset(&icount, 0, sizeof(icount)); 1744 icount.cts = cnow.cts; 1745 icount.dsr = cnow.dsr; 1746 icount.rng = cnow.rng; 1747 icount.dcd = cnow.dcd; 1748 icount.rx = cnow.rx; 1749 icount.tx = cnow.tx; 1750 icount.frame = cnow.frame; 1751 icount.overrun = cnow.overrun; 1752 icount.parity = cnow.parity; 1753 icount.brk = cnow.brk; 1754 icount.buf_overrun = cnow.buf_overrun; 1755 1756 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", 1757 __func__, port->number, icount.rx, icount.tx); 1758 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1759 return -EFAULT; 1760 return 0; 1761 } 1762 return -ENOIOCTLCMD; 1763 } 1764 1765 1766 /***************************************************************************** 1767 * SerialBreak 1768 * this function sends a break to the port 1769 *****************************************************************************/ 1770 static void edge_break(struct tty_struct *tty, int break_state) 1771 { 1772 struct usb_serial_port *port = tty->driver_data; 1773 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1774 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1775 int status; 1776 1777 if ((!edge_serial->is_epic) || 1778 ((edge_serial->is_epic) && 1779 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1780 /* flush and chase */ 1781 edge_port->chaseResponsePending = true; 1782 1783 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1784 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1785 if (status == 0) { 1786 /* block until chase finished */ 1787 block_until_chase_response(edge_port); 1788 } else { 1789 edge_port->chaseResponsePending = false; 1790 } 1791 } 1792 1793 if ((!edge_serial->is_epic) || 1794 ((edge_serial->is_epic) && 1795 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1796 if (break_state == -1) { 1797 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__); 1798 status = send_iosp_ext_cmd(edge_port, 1799 IOSP_CMD_SET_BREAK, 0); 1800 } else { 1801 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__); 1802 status = send_iosp_ext_cmd(edge_port, 1803 IOSP_CMD_CLEAR_BREAK, 0); 1804 } 1805 if (status) 1806 dbg("%s - error sending break set/clear command.", 1807 __func__); 1808 } 1809 1810 return; 1811 } 1812 1813 1814 /***************************************************************************** 1815 * process_rcvd_data 1816 * this function handles the data received on the bulk in pipe. 1817 *****************************************************************************/ 1818 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1819 unsigned char *buffer, __u16 bufferLength) 1820 { 1821 struct usb_serial_port *port; 1822 struct edgeport_port *edge_port; 1823 struct tty_struct *tty; 1824 __u16 lastBufferLength; 1825 __u16 rxLen; 1826 1827 dbg("%s", __func__); 1828 1829 lastBufferLength = bufferLength + 1; 1830 1831 while (bufferLength > 0) { 1832 /* failsafe incase we get a message that we don't understand */ 1833 if (lastBufferLength == bufferLength) { 1834 dbg("%s - stuck in loop, exiting it.", __func__); 1835 break; 1836 } 1837 lastBufferLength = bufferLength; 1838 1839 switch (edge_serial->rxState) { 1840 case EXPECT_HDR1: 1841 edge_serial->rxHeader1 = *buffer; 1842 ++buffer; 1843 --bufferLength; 1844 1845 if (bufferLength == 0) { 1846 edge_serial->rxState = EXPECT_HDR2; 1847 break; 1848 } 1849 /* otherwise, drop on through */ 1850 case EXPECT_HDR2: 1851 edge_serial->rxHeader2 = *buffer; 1852 ++buffer; 1853 --bufferLength; 1854 1855 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, 1856 edge_serial->rxHeader1, edge_serial->rxHeader2); 1857 /* Process depending on whether this header is 1858 * data or status */ 1859 1860 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1861 /* Decode this status header and go to 1862 * EXPECT_HDR1 (if we can process the status 1863 * with only 2 bytes), or go to EXPECT_HDR3 to 1864 * get the third byte. */ 1865 edge_serial->rxPort = 1866 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1867 edge_serial->rxStatusCode = 1868 IOSP_GET_STATUS_CODE( 1869 edge_serial->rxHeader1); 1870 1871 if (!IOSP_STATUS_IS_2BYTE( 1872 edge_serial->rxStatusCode)) { 1873 /* This status needs additional bytes. 1874 * Save what we have and then wait for 1875 * more data. 1876 */ 1877 edge_serial->rxStatusParam 1878 = edge_serial->rxHeader2; 1879 edge_serial->rxState = EXPECT_HDR3; 1880 break; 1881 } 1882 /* We have all the header bytes, process the 1883 status now */ 1884 process_rcvd_status(edge_serial, 1885 edge_serial->rxHeader2, 0); 1886 edge_serial->rxState = EXPECT_HDR1; 1887 break; 1888 } else { 1889 edge_serial->rxPort = 1890 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1891 edge_serial->rxBytesRemaining = 1892 IOSP_GET_HDR_DATA_LEN( 1893 edge_serial->rxHeader1, 1894 edge_serial->rxHeader2); 1895 dbg("%s - Data for Port %u Len %u", 1896 __func__, 1897 edge_serial->rxPort, 1898 edge_serial->rxBytesRemaining); 1899 1900 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1901 * ASSERT(DevExt->RxBytesRemaining < 1902 * IOSP_MAX_DATA_LENGTH); 1903 */ 1904 1905 if (bufferLength == 0) { 1906 edge_serial->rxState = EXPECT_DATA; 1907 break; 1908 } 1909 /* Else, drop through */ 1910 } 1911 case EXPECT_DATA: /* Expect data */ 1912 if (bufferLength < edge_serial->rxBytesRemaining) { 1913 rxLen = bufferLength; 1914 /* Expect data to start next buffer */ 1915 edge_serial->rxState = EXPECT_DATA; 1916 } else { 1917 /* BufLen >= RxBytesRemaining */ 1918 rxLen = edge_serial->rxBytesRemaining; 1919 /* Start another header next time */ 1920 edge_serial->rxState = EXPECT_HDR1; 1921 } 1922 1923 bufferLength -= rxLen; 1924 edge_serial->rxBytesRemaining -= rxLen; 1925 1926 /* spit this data back into the tty driver if this 1927 port is open */ 1928 if (rxLen) { 1929 port = edge_serial->serial->port[ 1930 edge_serial->rxPort]; 1931 edge_port = usb_get_serial_port_data(port); 1932 if (edge_port->open) { 1933 tty = tty_port_tty_get( 1934 &edge_port->port->port); 1935 if (tty) { 1936 dbg("%s - Sending %d bytes to TTY for port %d", 1937 __func__, rxLen, edge_serial->rxPort); 1938 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1939 tty_kref_put(tty); 1940 } 1941 edge_port->icount.rx += rxLen; 1942 } 1943 buffer += rxLen; 1944 } 1945 break; 1946 1947 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1948 edge_serial->rxHeader3 = *buffer; 1949 ++buffer; 1950 --bufferLength; 1951 1952 /* We have all the header bytes, process the 1953 status now */ 1954 process_rcvd_status(edge_serial, 1955 edge_serial->rxStatusParam, 1956 edge_serial->rxHeader3); 1957 edge_serial->rxState = EXPECT_HDR1; 1958 break; 1959 } 1960 } 1961 } 1962 1963 1964 /***************************************************************************** 1965 * process_rcvd_status 1966 * this function handles the any status messages received on the 1967 * bulk in pipe. 1968 *****************************************************************************/ 1969 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1970 __u8 byte2, __u8 byte3) 1971 { 1972 struct usb_serial_port *port; 1973 struct edgeport_port *edge_port; 1974 struct tty_struct *tty; 1975 __u8 code = edge_serial->rxStatusCode; 1976 1977 /* switch the port pointer to the one being currently talked about */ 1978 port = edge_serial->serial->port[edge_serial->rxPort]; 1979 edge_port = usb_get_serial_port_data(port); 1980 if (edge_port == NULL) { 1981 dev_err(&edge_serial->serial->dev->dev, 1982 "%s - edge_port == NULL for port %d\n", 1983 __func__, edge_serial->rxPort); 1984 return; 1985 } 1986 1987 dbg("%s - port %d", __func__, edge_serial->rxPort); 1988 1989 if (code == IOSP_EXT_STATUS) { 1990 switch (byte2) { 1991 case IOSP_EXT_STATUS_CHASE_RSP: 1992 /* we want to do EXT status regardless of port 1993 * open/closed */ 1994 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", 1995 __func__, edge_serial->rxPort, byte3); 1996 /* Currently, the only EXT_STATUS is Chase, so process 1997 * here instead of one more call to one more subroutine 1998 * If/when more EXT_STATUS, there'll be more work to do 1999 * Also, we currently clear flag and close the port 2000 * regardless of content of above's Byte3. 2001 * We could choose to do something else when Byte3 says 2002 * Timeout on Chase from Edgeport, like wait longer in 2003 * block_until_chase_response, but for now we don't. 2004 */ 2005 edge_port->chaseResponsePending = false; 2006 wake_up(&edge_port->wait_chase); 2007 return; 2008 2009 case IOSP_EXT_STATUS_RX_CHECK_RSP: 2010 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3); 2011 /* Port->RxCheckRsp = true; */ 2012 return; 2013 } 2014 } 2015 2016 if (code == IOSP_STATUS_OPEN_RSP) { 2017 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 2018 edge_port->maxTxCredits = edge_port->txCredits; 2019 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 2020 handle_new_msr(edge_port, byte2); 2021 2022 /* send the current line settings to the port so we are 2023 in sync with any further termios calls */ 2024 tty = tty_port_tty_get(&edge_port->port->port); 2025 if (tty) { 2026 change_port_settings(tty, 2027 edge_port, tty->termios); 2028 tty_kref_put(tty); 2029 } 2030 2031 /* we have completed the open */ 2032 edge_port->openPending = false; 2033 edge_port->open = true; 2034 wake_up(&edge_port->wait_open); 2035 return; 2036 } 2037 2038 /* If port is closed, silently discard all rcvd status. We can 2039 * have cases where buffered status is received AFTER the close 2040 * port command is sent to the Edgeport. 2041 */ 2042 if (!edge_port->open || edge_port->closePending) 2043 return; 2044 2045 switch (code) { 2046 /* Not currently sent by Edgeport */ 2047 case IOSP_STATUS_LSR: 2048 dbg("%s - Port %u LSR Status = %02x", 2049 __func__, edge_serial->rxPort, byte2); 2050 handle_new_lsr(edge_port, false, byte2, 0); 2051 break; 2052 2053 case IOSP_STATUS_LSR_DATA: 2054 dbg("%s - Port %u LSR Status = %02x, Data = %02x", 2055 __func__, edge_serial->rxPort, byte2, byte3); 2056 /* byte2 is LSR Register */ 2057 /* byte3 is broken data byte */ 2058 handle_new_lsr(edge_port, true, byte2, byte3); 2059 break; 2060 /* 2061 * case IOSP_EXT_4_STATUS: 2062 * dbg("%s - Port %u LSR Status = %02x Data = %02x", 2063 * __func__, edge_serial->rxPort, byte2, byte3); 2064 * break; 2065 */ 2066 case IOSP_STATUS_MSR: 2067 dbg("%s - Port %u MSR Status = %02x", 2068 __func__, edge_serial->rxPort, byte2); 2069 /* 2070 * Process this new modem status and generate appropriate 2071 * events, etc, based on the new status. This routine 2072 * also saves the MSR in Port->ShadowMsr. 2073 */ 2074 handle_new_msr(edge_port, byte2); 2075 break; 2076 2077 default: 2078 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code); 2079 break; 2080 } 2081 return; 2082 } 2083 2084 2085 /***************************************************************************** 2086 * edge_tty_recv 2087 * this function passes data on to the tty flip buffer 2088 *****************************************************************************/ 2089 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 2090 unsigned char *data, int length) 2091 { 2092 int cnt; 2093 2094 do { 2095 cnt = tty_buffer_request_room(tty, length); 2096 if (cnt < length) { 2097 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2098 __func__, length - cnt); 2099 if (cnt == 0) 2100 break; 2101 } 2102 tty_insert_flip_string(tty, data, cnt); 2103 data += cnt; 2104 length -= cnt; 2105 } while (length > 0); 2106 2107 tty_flip_buffer_push(tty); 2108 } 2109 2110 2111 /***************************************************************************** 2112 * handle_new_msr 2113 * this function handles any change to the msr register for a port. 2114 *****************************************************************************/ 2115 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2116 { 2117 struct async_icount *icount; 2118 2119 dbg("%s %02x", __func__, newMsr); 2120 2121 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2122 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2123 icount = &edge_port->icount; 2124 2125 /* update input line counters */ 2126 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2127 icount->cts++; 2128 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2129 icount->dsr++; 2130 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2131 icount->dcd++; 2132 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2133 icount->rng++; 2134 wake_up_interruptible(&edge_port->delta_msr_wait); 2135 } 2136 2137 /* Save the new modem status */ 2138 edge_port->shadowMSR = newMsr & 0xf0; 2139 2140 return; 2141 } 2142 2143 2144 /***************************************************************************** 2145 * handle_new_lsr 2146 * this function handles any change to the lsr register for a port. 2147 *****************************************************************************/ 2148 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2149 __u8 lsr, __u8 data) 2150 { 2151 __u8 newLsr = (__u8) (lsr & (__u8) 2152 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2153 struct async_icount *icount; 2154 2155 dbg("%s - %02x", __func__, newLsr); 2156 2157 edge_port->shadowLSR = lsr; 2158 2159 if (newLsr & LSR_BREAK) { 2160 /* 2161 * Parity and Framing errors only count if they 2162 * occur exclusive of a break being 2163 * received. 2164 */ 2165 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2166 } 2167 2168 /* Place LSR data byte into Rx buffer */ 2169 if (lsrData) { 2170 struct tty_struct *tty = 2171 tty_port_tty_get(&edge_port->port->port); 2172 if (tty) { 2173 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 2174 tty_kref_put(tty); 2175 } 2176 } 2177 /* update input line counters */ 2178 icount = &edge_port->icount; 2179 if (newLsr & LSR_BREAK) 2180 icount->brk++; 2181 if (newLsr & LSR_OVER_ERR) 2182 icount->overrun++; 2183 if (newLsr & LSR_PAR_ERR) 2184 icount->parity++; 2185 if (newLsr & LSR_FRM_ERR) 2186 icount->frame++; 2187 2188 return; 2189 } 2190 2191 2192 /**************************************************************************** 2193 * sram_write 2194 * writes a number of bytes to the Edgeport device's sram starting at the 2195 * given address. 2196 * If successful returns the number of bytes written, otherwise it returns 2197 * a negative error number of the problem. 2198 ****************************************************************************/ 2199 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2200 __u16 length, const __u8 *data) 2201 { 2202 int result; 2203 __u16 current_length; 2204 unsigned char *transfer_buffer; 2205 2206 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2207 2208 transfer_buffer = kmalloc(64, GFP_KERNEL); 2209 if (!transfer_buffer) { 2210 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2211 __func__, 64); 2212 return -ENOMEM; 2213 } 2214 2215 /* need to split these writes up into 64 byte chunks */ 2216 result = 0; 2217 while (length > 0) { 2218 if (length > 64) 2219 current_length = 64; 2220 else 2221 current_length = length; 2222 2223 /* dbg("%s - writing %x, %x, %d", __func__, 2224 extAddr, addr, current_length); */ 2225 memcpy(transfer_buffer, data, current_length); 2226 result = usb_control_msg(serial->dev, 2227 usb_sndctrlpipe(serial->dev, 0), 2228 USB_REQUEST_ION_WRITE_RAM, 2229 0x40, addr, extAddr, transfer_buffer, 2230 current_length, 300); 2231 if (result < 0) 2232 break; 2233 length -= current_length; 2234 addr += current_length; 2235 data += current_length; 2236 } 2237 2238 kfree(transfer_buffer); 2239 return result; 2240 } 2241 2242 2243 /**************************************************************************** 2244 * rom_write 2245 * writes a number of bytes to the Edgeport device's ROM starting at the 2246 * given address. 2247 * If successful returns the number of bytes written, otherwise it returns 2248 * a negative error number of the problem. 2249 ****************************************************************************/ 2250 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2251 __u16 length, const __u8 *data) 2252 { 2253 int result; 2254 __u16 current_length; 2255 unsigned char *transfer_buffer; 2256 2257 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */ 2258 2259 transfer_buffer = kmalloc(64, GFP_KERNEL); 2260 if (!transfer_buffer) { 2261 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2262 __func__, 64); 2263 return -ENOMEM; 2264 } 2265 2266 /* need to split these writes up into 64 byte chunks */ 2267 result = 0; 2268 while (length > 0) { 2269 if (length > 64) 2270 current_length = 64; 2271 else 2272 current_length = length; 2273 /* dbg("%s - writing %x, %x, %d", __func__, 2274 extAddr, addr, current_length); */ 2275 memcpy(transfer_buffer, data, current_length); 2276 result = usb_control_msg(serial->dev, 2277 usb_sndctrlpipe(serial->dev, 0), 2278 USB_REQUEST_ION_WRITE_ROM, 0x40, 2279 addr, extAddr, 2280 transfer_buffer, current_length, 300); 2281 if (result < 0) 2282 break; 2283 length -= current_length; 2284 addr += current_length; 2285 data += current_length; 2286 } 2287 2288 kfree(transfer_buffer); 2289 return result; 2290 } 2291 2292 2293 /**************************************************************************** 2294 * rom_read 2295 * reads a number of bytes from the Edgeport device starting at the given 2296 * address. 2297 * If successful returns the number of bytes read, otherwise it returns 2298 * a negative error number of the problem. 2299 ****************************************************************************/ 2300 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2301 __u16 addr, __u16 length, __u8 *data) 2302 { 2303 int result; 2304 __u16 current_length; 2305 unsigned char *transfer_buffer; 2306 2307 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2308 2309 transfer_buffer = kmalloc(64, GFP_KERNEL); 2310 if (!transfer_buffer) { 2311 dev_err(&serial->dev->dev, 2312 "%s - kmalloc(%d) failed.\n", __func__, 64); 2313 return -ENOMEM; 2314 } 2315 2316 /* need to split these reads up into 64 byte chunks */ 2317 result = 0; 2318 while (length > 0) { 2319 if (length > 64) 2320 current_length = 64; 2321 else 2322 current_length = length; 2323 /* dbg("%s - %x, %x, %d", __func__, 2324 extAddr, addr, current_length); */ 2325 result = usb_control_msg(serial->dev, 2326 usb_rcvctrlpipe(serial->dev, 0), 2327 USB_REQUEST_ION_READ_ROM, 2328 0xC0, addr, extAddr, transfer_buffer, 2329 current_length, 300); 2330 if (result < 0) 2331 break; 2332 memcpy(data, transfer_buffer, current_length); 2333 length -= current_length; 2334 addr += current_length; 2335 data += current_length; 2336 } 2337 2338 kfree(transfer_buffer); 2339 return result; 2340 } 2341 2342 2343 /**************************************************************************** 2344 * send_iosp_ext_cmd 2345 * Is used to send a IOSP message to the Edgeport device 2346 ****************************************************************************/ 2347 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2348 __u8 command, __u8 param) 2349 { 2350 unsigned char *buffer; 2351 unsigned char *currentCommand; 2352 int length = 0; 2353 int status = 0; 2354 2355 dbg("%s - %d, %d", __func__, command, param); 2356 2357 buffer = kmalloc(10, GFP_ATOMIC); 2358 if (!buffer) { 2359 dev_err(&edge_port->port->dev, 2360 "%s - kmalloc(%d) failed.\n", __func__, 10); 2361 return -ENOMEM; 2362 } 2363 2364 currentCommand = buffer; 2365 2366 MAKE_CMD_EXT_CMD(¤tCommand, &length, 2367 edge_port->port->number - edge_port->port->serial->minor, 2368 command, param); 2369 2370 status = write_cmd_usb(edge_port, buffer, length); 2371 if (status) { 2372 /* something bad happened, let's free up the memory */ 2373 kfree(buffer); 2374 } 2375 2376 return status; 2377 } 2378 2379 2380 /***************************************************************************** 2381 * write_cmd_usb 2382 * this function writes the given buffer out to the bulk write endpoint. 2383 *****************************************************************************/ 2384 static int write_cmd_usb(struct edgeport_port *edge_port, 2385 unsigned char *buffer, int length) 2386 { 2387 struct edgeport_serial *edge_serial = 2388 usb_get_serial_data(edge_port->port->serial); 2389 int status = 0; 2390 struct urb *urb; 2391 int timeout; 2392 2393 usb_serial_debug_data(debug, &edge_port->port->dev, 2394 __func__, length, buffer); 2395 2396 /* Allocate our next urb */ 2397 urb = usb_alloc_urb(0, GFP_ATOMIC); 2398 if (!urb) 2399 return -ENOMEM; 2400 2401 atomic_inc(&CmdUrbs); 2402 dbg("%s - ALLOCATE URB %p (outstanding %d)", 2403 __func__, urb, atomic_read(&CmdUrbs)); 2404 2405 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2406 usb_sndbulkpipe(edge_serial->serial->dev, 2407 edge_serial->bulk_out_endpoint), 2408 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2409 2410 edge_port->commandPending = true; 2411 status = usb_submit_urb(urb, GFP_ATOMIC); 2412 2413 if (status) { 2414 /* something went wrong */ 2415 dev_err(&edge_port->port->dev, 2416 "%s - usb_submit_urb(write command) failed, status = %d\n", 2417 __func__, status); 2418 usb_kill_urb(urb); 2419 usb_free_urb(urb); 2420 atomic_dec(&CmdUrbs); 2421 return status; 2422 } 2423 2424 /* wait for command to finish */ 2425 timeout = COMMAND_TIMEOUT; 2426 #if 0 2427 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2428 2429 if (edge_port->commandPending) { 2430 /* command timed out */ 2431 dbg("%s - command timed out", __func__); 2432 status = -EINVAL; 2433 } 2434 #endif 2435 return status; 2436 } 2437 2438 2439 /***************************************************************************** 2440 * send_cmd_write_baud_rate 2441 * this function sends the proper command to change the baud rate of the 2442 * specified port. 2443 *****************************************************************************/ 2444 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2445 int baudRate) 2446 { 2447 struct edgeport_serial *edge_serial = 2448 usb_get_serial_data(edge_port->port->serial); 2449 unsigned char *cmdBuffer; 2450 unsigned char *currCmd; 2451 int cmdLen = 0; 2452 int divisor; 2453 int status; 2454 unsigned char number = 2455 edge_port->port->number - edge_port->port->serial->minor; 2456 2457 if (edge_serial->is_epic && 2458 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2459 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2460 edge_port->port->number, baudRate); 2461 return 0; 2462 } 2463 2464 dbg("%s - port = %d, baud = %d", __func__, 2465 edge_port->port->number, baudRate); 2466 2467 status = calc_baud_rate_divisor(baudRate, &divisor); 2468 if (status) { 2469 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", 2470 __func__); 2471 return status; 2472 } 2473 2474 /* Alloc memory for the string of commands. */ 2475 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2476 if (!cmdBuffer) { 2477 dev_err(&edge_port->port->dev, 2478 "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2479 return -ENOMEM; 2480 } 2481 currCmd = cmdBuffer; 2482 2483 /* Enable access to divisor latch */ 2484 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2485 2486 /* Write the divisor itself */ 2487 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2488 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2489 2490 /* Restore original value to disable access to divisor latch */ 2491 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2492 edge_port->shadowLCR); 2493 2494 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2495 if (status) { 2496 /* something bad happened, let's free up the memory */ 2497 kfree(cmdBuffer); 2498 } 2499 2500 return status; 2501 } 2502 2503 2504 /***************************************************************************** 2505 * calc_baud_rate_divisor 2506 * this function calculates the proper baud rate divisor for the specified 2507 * baud rate. 2508 *****************************************************************************/ 2509 static int calc_baud_rate_divisor(int baudrate, int *divisor) 2510 { 2511 int i; 2512 __u16 custom; 2513 2514 2515 dbg("%s - %d", __func__, baudrate); 2516 2517 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2518 if (divisor_table[i].BaudRate == baudrate) { 2519 *divisor = divisor_table[i].Divisor; 2520 return 0; 2521 } 2522 } 2523 2524 /* We have tried all of the standard baud rates 2525 * lets try to calculate the divisor for this baud rate 2526 * Make sure the baud rate is reasonable */ 2527 if (baudrate > 50 && baudrate < 230400) { 2528 /* get divisor */ 2529 custom = (__u16)((230400L + baudrate/2) / baudrate); 2530 2531 *divisor = custom; 2532 2533 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom); 2534 return 0; 2535 } 2536 2537 return -1; 2538 } 2539 2540 2541 /***************************************************************************** 2542 * send_cmd_write_uart_register 2543 * this function builds up a uart register message and sends to the device. 2544 *****************************************************************************/ 2545 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2546 __u8 regNum, __u8 regValue) 2547 { 2548 struct edgeport_serial *edge_serial = 2549 usb_get_serial_data(edge_port->port->serial); 2550 unsigned char *cmdBuffer; 2551 unsigned char *currCmd; 2552 unsigned long cmdLen = 0; 2553 int status; 2554 2555 dbg("%s - write to %s register 0x%02x", 2556 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2557 2558 if (edge_serial->is_epic && 2559 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2560 regNum == MCR) { 2561 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2562 return 0; 2563 } 2564 2565 if (edge_serial->is_epic && 2566 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2567 regNum == LCR) { 2568 dbg("SendCmdWriteUartReg - Not writing to LCR Register"); 2569 return 0; 2570 } 2571 2572 /* Alloc memory for the string of commands. */ 2573 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2574 if (cmdBuffer == NULL) 2575 return -ENOMEM; 2576 2577 currCmd = cmdBuffer; 2578 2579 /* Build a cmd in the buffer to write the given register */ 2580 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, 2581 edge_port->port->number - edge_port->port->serial->minor, 2582 regNum, regValue); 2583 2584 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2585 if (status) { 2586 /* something bad happened, let's free up the memory */ 2587 kfree(cmdBuffer); 2588 } 2589 2590 return status; 2591 } 2592 2593 2594 /***************************************************************************** 2595 * change_port_settings 2596 * This routine is called to set the UART on the device to match the 2597 * specified new settings. 2598 *****************************************************************************/ 2599 2600 static void change_port_settings(struct tty_struct *tty, 2601 struct edgeport_port *edge_port, struct ktermios *old_termios) 2602 { 2603 struct edgeport_serial *edge_serial = 2604 usb_get_serial_data(edge_port->port->serial); 2605 int baud; 2606 unsigned cflag; 2607 __u8 mask = 0xff; 2608 __u8 lData; 2609 __u8 lParity; 2610 __u8 lStop; 2611 __u8 rxFlow; 2612 __u8 txFlow; 2613 int status; 2614 2615 dbg("%s - port %d", __func__, edge_port->port->number); 2616 2617 if (!edge_port->open && 2618 !edge_port->openPending) { 2619 dbg("%s - port not opened", __func__); 2620 return; 2621 } 2622 2623 cflag = tty->termios->c_cflag; 2624 2625 switch (cflag & CSIZE) { 2626 case CS5: 2627 lData = LCR_BITS_5; mask = 0x1f; 2628 dbg("%s - data bits = 5", __func__); 2629 break; 2630 case CS6: 2631 lData = LCR_BITS_6; mask = 0x3f; 2632 dbg("%s - data bits = 6", __func__); 2633 break; 2634 case CS7: 2635 lData = LCR_BITS_7; mask = 0x7f; 2636 dbg("%s - data bits = 7", __func__); 2637 break; 2638 default: 2639 case CS8: 2640 lData = LCR_BITS_8; 2641 dbg("%s - data bits = 8", __func__); 2642 break; 2643 } 2644 2645 lParity = LCR_PAR_NONE; 2646 if (cflag & PARENB) { 2647 if (cflag & CMSPAR) { 2648 if (cflag & PARODD) { 2649 lParity = LCR_PAR_MARK; 2650 dbg("%s - parity = mark", __func__); 2651 } else { 2652 lParity = LCR_PAR_SPACE; 2653 dbg("%s - parity = space", __func__); 2654 } 2655 } else if (cflag & PARODD) { 2656 lParity = LCR_PAR_ODD; 2657 dbg("%s - parity = odd", __func__); 2658 } else { 2659 lParity = LCR_PAR_EVEN; 2660 dbg("%s - parity = even", __func__); 2661 } 2662 } else { 2663 dbg("%s - parity = none", __func__); 2664 } 2665 2666 if (cflag & CSTOPB) { 2667 lStop = LCR_STOP_2; 2668 dbg("%s - stop bits = 2", __func__); 2669 } else { 2670 lStop = LCR_STOP_1; 2671 dbg("%s - stop bits = 1", __func__); 2672 } 2673 2674 /* figure out the flow control settings */ 2675 rxFlow = txFlow = 0x00; 2676 if (cflag & CRTSCTS) { 2677 rxFlow |= IOSP_RX_FLOW_RTS; 2678 txFlow |= IOSP_TX_FLOW_CTS; 2679 dbg("%s - RTS/CTS is enabled", __func__); 2680 } else { 2681 dbg("%s - RTS/CTS is disabled", __func__); 2682 } 2683 2684 /* if we are implementing XON/XOFF, set the start and stop character 2685 in the device */ 2686 if (I_IXOFF(tty) || I_IXON(tty)) { 2687 unsigned char stop_char = STOP_CHAR(tty); 2688 unsigned char start_char = START_CHAR(tty); 2689 2690 if ((!edge_serial->is_epic) || 2691 ((edge_serial->is_epic) && 2692 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2693 send_iosp_ext_cmd(edge_port, 2694 IOSP_CMD_SET_XON_CHAR, start_char); 2695 send_iosp_ext_cmd(edge_port, 2696 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2697 } 2698 2699 /* if we are implementing INBOUND XON/XOFF */ 2700 if (I_IXOFF(tty)) { 2701 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2702 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2703 __func__, start_char, stop_char); 2704 } else { 2705 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2706 } 2707 2708 /* if we are implementing OUTBOUND XON/XOFF */ 2709 if (I_IXON(tty)) { 2710 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2711 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2712 __func__, start_char, stop_char); 2713 } else { 2714 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2715 } 2716 } 2717 2718 /* Set flow control to the configured value */ 2719 if ((!edge_serial->is_epic) || 2720 ((edge_serial->is_epic) && 2721 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2722 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2723 if ((!edge_serial->is_epic) || 2724 ((edge_serial->is_epic) && 2725 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2726 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2727 2728 2729 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2730 edge_port->shadowLCR |= (lData | lParity | lStop); 2731 2732 edge_port->validDataMask = mask; 2733 2734 /* Send the updated LCR value to the EdgePort */ 2735 status = send_cmd_write_uart_register(edge_port, LCR, 2736 edge_port->shadowLCR); 2737 if (status != 0) 2738 return; 2739 2740 /* set up the MCR register and send it to the EdgePort */ 2741 edge_port->shadowMCR = MCR_MASTER_IE; 2742 if (cflag & CBAUD) 2743 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2744 2745 status = send_cmd_write_uart_register(edge_port, MCR, 2746 edge_port->shadowMCR); 2747 if (status != 0) 2748 return; 2749 2750 /* Determine divisor based on baud rate */ 2751 baud = tty_get_baud_rate(tty); 2752 if (!baud) { 2753 /* pick a default, any default... */ 2754 baud = 9600; 2755 } 2756 2757 dbg("%s - baud rate = %d", __func__, baud); 2758 status = send_cmd_write_baud_rate(edge_port, baud); 2759 if (status == -1) { 2760 /* Speed change was not possible - put back the old speed */ 2761 baud = tty_termios_baud_rate(old_termios); 2762 tty_encode_baud_rate(tty, baud, baud); 2763 } 2764 return; 2765 } 2766 2767 2768 /**************************************************************************** 2769 * unicode_to_ascii 2770 * Turns a string from Unicode into ASCII. 2771 * Doesn't do a good job with any characters that are outside the normal 2772 * ASCII range, but it's only for debugging... 2773 * NOTE: expects the unicode in LE format 2774 ****************************************************************************/ 2775 static void unicode_to_ascii(char *string, int buflen, 2776 __le16 *unicode, int unicode_size) 2777 { 2778 int i; 2779 2780 if (buflen <= 0) /* never happens, but... */ 2781 return; 2782 --buflen; /* space for nul */ 2783 2784 for (i = 0; i < unicode_size; i++) { 2785 if (i >= buflen) 2786 break; 2787 string[i] = (char)(le16_to_cpu(unicode[i])); 2788 } 2789 string[i] = 0x00; 2790 } 2791 2792 2793 /**************************************************************************** 2794 * get_manufacturing_desc 2795 * reads in the manufacturing descriptor and stores it into the serial 2796 * structure. 2797 ****************************************************************************/ 2798 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2799 { 2800 int response; 2801 2802 dbg("getting manufacturer descriptor"); 2803 2804 response = rom_read(edge_serial->serial, 2805 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2806 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2807 EDGE_MANUF_DESC_LEN, 2808 (__u8 *)(&edge_serial->manuf_descriptor)); 2809 2810 if (response < 1) 2811 dev_err(&edge_serial->serial->dev->dev, 2812 "error in getting manufacturer descriptor\n"); 2813 else { 2814 char string[30]; 2815 dbg("**Manufacturer Descriptor"); 2816 dbg(" RomSize: %dK", 2817 edge_serial->manuf_descriptor.RomSize); 2818 dbg(" RamSize: %dK", 2819 edge_serial->manuf_descriptor.RamSize); 2820 dbg(" CpuRev: %d", 2821 edge_serial->manuf_descriptor.CpuRev); 2822 dbg(" BoardRev: %d", 2823 edge_serial->manuf_descriptor.BoardRev); 2824 dbg(" NumPorts: %d", 2825 edge_serial->manuf_descriptor.NumPorts); 2826 dbg(" DescDate: %d/%d/%d", 2827 edge_serial->manuf_descriptor.DescDate[0], 2828 edge_serial->manuf_descriptor.DescDate[1], 2829 edge_serial->manuf_descriptor.DescDate[2]+1900); 2830 unicode_to_ascii(string, sizeof(string), 2831 edge_serial->manuf_descriptor.SerialNumber, 2832 edge_serial->manuf_descriptor.SerNumLength/2); 2833 dbg(" SerialNumber: %s", string); 2834 unicode_to_ascii(string, sizeof(string), 2835 edge_serial->manuf_descriptor.AssemblyNumber, 2836 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2837 dbg(" AssemblyNumber: %s", string); 2838 unicode_to_ascii(string, sizeof(string), 2839 edge_serial->manuf_descriptor.OemAssyNumber, 2840 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2841 dbg(" OemAssyNumber: %s", string); 2842 dbg(" UartType: %d", 2843 edge_serial->manuf_descriptor.UartType); 2844 dbg(" IonPid: %d", 2845 edge_serial->manuf_descriptor.IonPid); 2846 dbg(" IonConfig: %d", 2847 edge_serial->manuf_descriptor.IonConfig); 2848 } 2849 } 2850 2851 2852 /**************************************************************************** 2853 * get_boot_desc 2854 * reads in the bootloader descriptor and stores it into the serial 2855 * structure. 2856 ****************************************************************************/ 2857 static void get_boot_desc(struct edgeport_serial *edge_serial) 2858 { 2859 int response; 2860 2861 dbg("getting boot descriptor"); 2862 2863 response = rom_read(edge_serial->serial, 2864 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2865 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2866 EDGE_BOOT_DESC_LEN, 2867 (__u8 *)(&edge_serial->boot_descriptor)); 2868 2869 if (response < 1) 2870 dev_err(&edge_serial->serial->dev->dev, 2871 "error in getting boot descriptor\n"); 2872 else { 2873 dbg("**Boot Descriptor:"); 2874 dbg(" BootCodeLength: %d", 2875 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2876 dbg(" MajorVersion: %d", 2877 edge_serial->boot_descriptor.MajorVersion); 2878 dbg(" MinorVersion: %d", 2879 edge_serial->boot_descriptor.MinorVersion); 2880 dbg(" BuildNumber: %d", 2881 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2882 dbg(" Capabilities: 0x%x", 2883 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2884 dbg(" UConfig0: %d", 2885 edge_serial->boot_descriptor.UConfig0); 2886 dbg(" UConfig1: %d", 2887 edge_serial->boot_descriptor.UConfig1); 2888 } 2889 } 2890 2891 2892 /**************************************************************************** 2893 * load_application_firmware 2894 * This is called to load the application firmware to the device 2895 ****************************************************************************/ 2896 static void load_application_firmware(struct edgeport_serial *edge_serial) 2897 { 2898 const struct ihex_binrec *rec; 2899 const struct firmware *fw; 2900 const char *fw_name; 2901 const char *fw_info; 2902 int response; 2903 __u32 Operaddr; 2904 __u16 build; 2905 2906 switch (edge_serial->product_info.iDownloadFile) { 2907 case EDGE_DOWNLOAD_FILE_I930: 2908 fw_info = "downloading firmware version (930)"; 2909 fw_name = "edgeport/down.fw"; 2910 break; 2911 2912 case EDGE_DOWNLOAD_FILE_80251: 2913 fw_info = "downloading firmware version (80251)"; 2914 fw_name = "edgeport/down2.fw"; 2915 break; 2916 2917 case EDGE_DOWNLOAD_FILE_NONE: 2918 dbg ("No download file specified, skipping download\n"); 2919 return; 2920 2921 default: 2922 return; 2923 } 2924 2925 response = request_ihex_firmware(&fw, fw_name, 2926 &edge_serial->serial->dev->dev); 2927 if (response) { 2928 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 2929 fw_name, response); 2930 return; 2931 } 2932 2933 rec = (const struct ihex_binrec *)fw->data; 2934 build = (rec->data[2] << 8) | rec->data[3]; 2935 2936 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build); 2937 2938 edge_serial->product_info.FirmwareMajorVersion = fw->data[0]; 2939 edge_serial->product_info.FirmwareMinorVersion = fw->data[1]; 2940 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2941 2942 for (rec = ihex_next_binrec(rec); rec; 2943 rec = ihex_next_binrec(rec)) { 2944 Operaddr = be32_to_cpu(rec->addr); 2945 response = sram_write(edge_serial->serial, 2946 Operaddr >> 16, 2947 Operaddr & 0xFFFF, 2948 be16_to_cpu(rec->len), 2949 &rec->data[0]); 2950 if (response < 0) { 2951 dev_err(&edge_serial->serial->dev->dev, 2952 "sram_write failed (%x, %x, %d)\n", 2953 Operaddr >> 16, Operaddr & 0xFFFF, 2954 be16_to_cpu(rec->len)); 2955 break; 2956 } 2957 } 2958 2959 dbg("sending exec_dl_code"); 2960 response = usb_control_msg (edge_serial->serial->dev, 2961 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2962 USB_REQUEST_ION_EXEC_DL_CODE, 2963 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2964 2965 release_firmware(fw); 2966 return; 2967 } 2968 2969 2970 /**************************************************************************** 2971 * edge_startup 2972 ****************************************************************************/ 2973 static int edge_startup(struct usb_serial *serial) 2974 { 2975 struct edgeport_serial *edge_serial; 2976 struct edgeport_port *edge_port; 2977 struct usb_device *dev; 2978 int i, j; 2979 int response; 2980 bool interrupt_in_found; 2981 bool bulk_in_found; 2982 bool bulk_out_found; 2983 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2984 EDGE_COMPATIBILITY_MASK1, 2985 EDGE_COMPATIBILITY_MASK2 }; 2986 2987 dev = serial->dev; 2988 2989 /* create our private serial structure */ 2990 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2991 if (edge_serial == NULL) { 2992 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2993 return -ENOMEM; 2994 } 2995 spin_lock_init(&edge_serial->es_lock); 2996 edge_serial->serial = serial; 2997 usb_set_serial_data(serial, edge_serial); 2998 2999 /* get the name for the device from the device */ 3000 i = get_string(dev, dev->descriptor.iManufacturer, 3001 &edge_serial->name[0], MAX_NAME_LEN+1); 3002 edge_serial->name[i++] = ' '; 3003 get_string(dev, dev->descriptor.iProduct, 3004 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 3005 3006 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 3007 3008 /* Read the epic descriptor */ 3009 if (get_epic_descriptor(edge_serial) <= 0) { 3010 /* memcpy descriptor to Supports structures */ 3011 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 3012 sizeof(struct edge_compatibility_bits)); 3013 3014 /* get the manufacturing descriptor for this device */ 3015 get_manufacturing_desc(edge_serial); 3016 3017 /* get the boot descriptor */ 3018 get_boot_desc(edge_serial); 3019 3020 get_product_info(edge_serial); 3021 } 3022 3023 /* set the number of ports from the manufacturing description */ 3024 /* serial->num_ports = serial->product_info.NumPorts; */ 3025 if ((!edge_serial->is_epic) && 3026 (edge_serial->product_info.NumPorts != serial->num_ports)) { 3027 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 3028 "vs. core thinking we have %d ports, email " 3029 "greg@kroah.com this information.\n", 3030 edge_serial->product_info.NumPorts, 3031 serial->num_ports); 3032 } 3033 3034 dbg("%s - time 1 %ld", __func__, jiffies); 3035 3036 /* If not an EPiC device */ 3037 if (!edge_serial->is_epic) { 3038 /* now load the application firmware into this device */ 3039 load_application_firmware(edge_serial); 3040 3041 dbg("%s - time 2 %ld", __func__, jiffies); 3042 3043 /* Check current Edgeport EEPROM and update if necessary */ 3044 update_edgeport_E2PROM(edge_serial); 3045 3046 dbg("%s - time 3 %ld", __func__, jiffies); 3047 3048 /* set the configuration to use #1 */ 3049 /* dbg("set_configuration 1"); */ 3050 /* usb_set_configuration (dev, 1); */ 3051 } 3052 dbg(" FirmwareMajorVersion %d.%d.%d", 3053 edge_serial->product_info.FirmwareMajorVersion, 3054 edge_serial->product_info.FirmwareMinorVersion, 3055 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 3056 3057 /* we set up the pointers to the endpoints in the edge_open function, 3058 * as the structures aren't created yet. */ 3059 3060 /* set up our port private structures */ 3061 for (i = 0; i < serial->num_ports; ++i) { 3062 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL); 3063 if (edge_port == NULL) { 3064 dev_err(&serial->dev->dev, "%s - Out of memory\n", 3065 __func__); 3066 for (j = 0; j < i; ++j) { 3067 kfree(usb_get_serial_port_data(serial->port[j])); 3068 usb_set_serial_port_data(serial->port[j], 3069 NULL); 3070 } 3071 usb_set_serial_data(serial, NULL); 3072 kfree(edge_serial); 3073 return -ENOMEM; 3074 } 3075 memset(edge_port, 0, sizeof(struct edgeport_port)); 3076 spin_lock_init(&edge_port->ep_lock); 3077 edge_port->port = serial->port[i]; 3078 usb_set_serial_port_data(serial->port[i], edge_port); 3079 } 3080 3081 response = 0; 3082 3083 if (edge_serial->is_epic) { 3084 /* EPIC thing, set up our interrupt polling now and our read 3085 * urb, so that the device knows it really is connected. */ 3086 interrupt_in_found = bulk_in_found = bulk_out_found = false; 3087 for (i = 0; i < serial->interface->altsetting[0] 3088 .desc.bNumEndpoints; ++i) { 3089 struct usb_endpoint_descriptor *endpoint; 3090 int buffer_size; 3091 3092 endpoint = &serial->interface->altsetting[0]. 3093 endpoint[i].desc; 3094 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 3095 if (!interrupt_in_found && 3096 (usb_endpoint_is_int_in(endpoint))) { 3097 /* we found a interrupt in endpoint */ 3098 dbg("found interrupt in"); 3099 3100 /* not set up yet, so do it now */ 3101 edge_serial->interrupt_read_urb = 3102 usb_alloc_urb(0, GFP_KERNEL); 3103 if (!edge_serial->interrupt_read_urb) { 3104 dev_err(&dev->dev, "out of memory\n"); 3105 return -ENOMEM; 3106 } 3107 edge_serial->interrupt_in_buffer = 3108 kmalloc(buffer_size, GFP_KERNEL); 3109 if (!edge_serial->interrupt_in_buffer) { 3110 dev_err(&dev->dev, "out of memory\n"); 3111 usb_free_urb(edge_serial->interrupt_read_urb); 3112 return -ENOMEM; 3113 } 3114 edge_serial->interrupt_in_endpoint = 3115 endpoint->bEndpointAddress; 3116 3117 /* set up our interrupt urb */ 3118 usb_fill_int_urb( 3119 edge_serial->interrupt_read_urb, 3120 dev, 3121 usb_rcvintpipe(dev, 3122 endpoint->bEndpointAddress), 3123 edge_serial->interrupt_in_buffer, 3124 buffer_size, 3125 edge_interrupt_callback, 3126 edge_serial, 3127 endpoint->bInterval); 3128 3129 interrupt_in_found = true; 3130 } 3131 3132 if (!bulk_in_found && 3133 (usb_endpoint_is_bulk_in(endpoint))) { 3134 /* we found a bulk in endpoint */ 3135 dbg("found bulk in"); 3136 3137 /* not set up yet, so do it now */ 3138 edge_serial->read_urb = 3139 usb_alloc_urb(0, GFP_KERNEL); 3140 if (!edge_serial->read_urb) { 3141 dev_err(&dev->dev, "out of memory\n"); 3142 return -ENOMEM; 3143 } 3144 edge_serial->bulk_in_buffer = 3145 kmalloc(buffer_size, GFP_KERNEL); 3146 if (!edge_serial->bulk_in_buffer) { 3147 dev_err(&dev->dev, "out of memory\n"); 3148 usb_free_urb(edge_serial->read_urb); 3149 return -ENOMEM; 3150 } 3151 edge_serial->bulk_in_endpoint = 3152 endpoint->bEndpointAddress; 3153 3154 /* set up our bulk in urb */ 3155 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3156 usb_rcvbulkpipe(dev, 3157 endpoint->bEndpointAddress), 3158 edge_serial->bulk_in_buffer, 3159 le16_to_cpu(endpoint->wMaxPacketSize), 3160 edge_bulk_in_callback, 3161 edge_serial); 3162 bulk_in_found = true; 3163 } 3164 3165 if (!bulk_out_found && 3166 (usb_endpoint_is_bulk_out(endpoint))) { 3167 /* we found a bulk out endpoint */ 3168 dbg("found bulk out"); 3169 edge_serial->bulk_out_endpoint = 3170 endpoint->bEndpointAddress; 3171 bulk_out_found = true; 3172 } 3173 } 3174 3175 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3176 dev_err(&dev->dev, "Error - the proper endpoints " 3177 "were not found!\n"); 3178 return -ENODEV; 3179 } 3180 3181 /* start interrupt read for this edgeport this interrupt will 3182 * continue as long as the edgeport is connected */ 3183 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3184 GFP_KERNEL); 3185 if (response) 3186 dev_err(&dev->dev, 3187 "%s - Error %d submitting control urb\n", 3188 __func__, response); 3189 } 3190 return response; 3191 } 3192 3193 3194 /**************************************************************************** 3195 * edge_disconnect 3196 * This function is called whenever the device is removed from the usb bus. 3197 ****************************************************************************/ 3198 static void edge_disconnect(struct usb_serial *serial) 3199 { 3200 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3201 3202 dbg("%s", __func__); 3203 3204 /* stop reads and writes on all ports */ 3205 /* free up our endpoint stuff */ 3206 if (edge_serial->is_epic) { 3207 usb_kill_urb(edge_serial->interrupt_read_urb); 3208 usb_free_urb(edge_serial->interrupt_read_urb); 3209 kfree(edge_serial->interrupt_in_buffer); 3210 3211 usb_kill_urb(edge_serial->read_urb); 3212 usb_free_urb(edge_serial->read_urb); 3213 kfree(edge_serial->bulk_in_buffer); 3214 } 3215 } 3216 3217 3218 /**************************************************************************** 3219 * edge_release 3220 * This function is called when the device structure is deallocated. 3221 ****************************************************************************/ 3222 static void edge_release(struct usb_serial *serial) 3223 { 3224 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3225 int i; 3226 3227 dbg("%s", __func__); 3228 3229 for (i = 0; i < serial->num_ports; ++i) 3230 kfree(usb_get_serial_port_data(serial->port[i])); 3231 3232 kfree(edge_serial); 3233 } 3234 3235 3236 /**************************************************************************** 3237 * edgeport_init 3238 * This is called by the module subsystem, or on startup to initialize us 3239 ****************************************************************************/ 3240 static int __init edgeport_init(void) 3241 { 3242 int retval; 3243 3244 retval = usb_serial_register(&edgeport_2port_device); 3245 if (retval) 3246 goto failed_2port_device_register; 3247 retval = usb_serial_register(&edgeport_4port_device); 3248 if (retval) 3249 goto failed_4port_device_register; 3250 retval = usb_serial_register(&edgeport_8port_device); 3251 if (retval) 3252 goto failed_8port_device_register; 3253 retval = usb_serial_register(&epic_device); 3254 if (retval) 3255 goto failed_epic_device_register; 3256 retval = usb_register(&io_driver); 3257 if (retval) 3258 goto failed_usb_register; 3259 atomic_set(&CmdUrbs, 0); 3260 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 3261 DRIVER_DESC "\n"); 3262 return 0; 3263 3264 failed_usb_register: 3265 usb_serial_deregister(&epic_device); 3266 failed_epic_device_register: 3267 usb_serial_deregister(&edgeport_8port_device); 3268 failed_8port_device_register: 3269 usb_serial_deregister(&edgeport_4port_device); 3270 failed_4port_device_register: 3271 usb_serial_deregister(&edgeport_2port_device); 3272 failed_2port_device_register: 3273 return retval; 3274 } 3275 3276 3277 /**************************************************************************** 3278 * edgeport_exit 3279 * Called when the driver is about to be unloaded. 3280 ****************************************************************************/ 3281 static void __exit edgeport_exit (void) 3282 { 3283 usb_deregister(&io_driver); 3284 usb_serial_deregister(&edgeport_2port_device); 3285 usb_serial_deregister(&edgeport_4port_device); 3286 usb_serial_deregister(&edgeport_8port_device); 3287 usb_serial_deregister(&epic_device); 3288 } 3289 3290 module_init(edgeport_init); 3291 module_exit(edgeport_exit); 3292 3293 /* Module information */ 3294 MODULE_AUTHOR(DRIVER_AUTHOR); 3295 MODULE_DESCRIPTION(DRIVER_DESC); 3296 MODULE_LICENSE("GPL"); 3297 MODULE_FIRMWARE("edgeport/boot.fw"); 3298 MODULE_FIRMWARE("edgeport/boot2.fw"); 3299 MODULE_FIRMWARE("edgeport/down.fw"); 3300 MODULE_FIRMWARE("edgeport/down2.fw"); 3301 3302 module_param(debug, bool, S_IRUGO | S_IWUSR); 3303 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3304