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