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 <asm/uaccess.h> 46 #include <linux/usb.h> 47 #include <linux/usb/serial.h> 48 #include "io_edgeport.h" 49 #include "io_ionsp.h" /* info for the iosp messages */ 50 #include "io_16654.h" /* 16654 UART defines */ 51 52 /* 53 * Version Information 54 */ 55 #define DRIVER_VERSION "v2.7" 56 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 57 #define DRIVER_DESC "Edgeport USB Serial Driver" 58 59 /* First, the latest boot code - for first generation edgeports */ 60 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1 61 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1 62 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */ 63 64 /* for second generation edgeports */ 65 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2 66 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2 67 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */ 68 69 /* Then finally the main run-time operational code - for first generation edgeports */ 70 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1 71 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1 72 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */ 73 74 /* for second generation edgeports */ 75 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2 76 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2 77 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */ 78 79 #define MAX_NAME_LEN 64 80 81 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 82 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 83 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 84 85 /* receive port state */ 86 enum RXSTATE { 87 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 88 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 89 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 90 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 91 }; 92 93 94 /* Transmit Fifo 95 * This Transmit queue is an extension of the edgeport Rx buffer. 96 * The maximum amount of data buffered in both the edgeport 97 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 98 */ 99 struct TxFifo { 100 unsigned int head; /* index to head pointer (write) */ 101 unsigned int tail; /* index to tail pointer (read) */ 102 unsigned int count; /* Bytes in queue */ 103 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 104 unsigned char *fifo; /* allocated Buffer */ 105 }; 106 107 /* This structure holds all of the local port information */ 108 struct edgeport_port { 109 __u16 txCredits; /* our current credits for this port */ 110 __u16 maxTxCredits; /* the max size of the port */ 111 112 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 113 struct urb *write_urb; /* write URB for this port */ 114 bool write_in_progress; /* 'true' while a write URB is outstanding */ 115 spinlock_t ep_lock; 116 117 __u8 shadowLCR; /* last LCR value received */ 118 __u8 shadowMCR; /* last MCR value received */ 119 __u8 shadowMSR; /* last MSR value received */ 120 __u8 shadowLSR; /* last LSR value received */ 121 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 122 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 123 __u8 validDataMask; 124 __u32 baudRate; 125 126 bool open; 127 bool openPending; 128 bool commandPending; 129 bool closePending; 130 bool chaseResponsePending; 131 132 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 133 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 134 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 135 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 136 137 struct async_icount icount; 138 struct usb_serial_port *port; /* loop back to the owner of this object */ 139 }; 140 141 142 /* This structure holds all of the individual device information */ 143 struct edgeport_serial { 144 char name[MAX_NAME_LEN+2]; /* string name of this device */ 145 146 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 147 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 148 struct edgeport_product_info product_info; /* Product Info */ 149 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 150 int is_epic; /* flag if EPiC device or not */ 151 152 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 153 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 154 struct urb * interrupt_read_urb; /* our interrupt urb */ 155 156 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 157 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 158 struct urb * read_urb; /* our bulk read urb */ 159 bool read_in_progress; 160 spinlock_t es_lock; 161 162 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 163 164 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 165 166 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 167 __u8 rxHeader1; /* receive header byte 1 */ 168 __u8 rxHeader2; /* receive header byte 2 */ 169 __u8 rxHeader3; /* receive header byte 3 */ 170 __u8 rxPort; /* the port that we are currently receiving data for */ 171 __u8 rxStatusCode; /* the receive status code */ 172 __u8 rxStatusParam; /* the receive status paramater */ 173 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 174 struct usb_serial *serial; /* loop back to the owner of this object */ 175 }; 176 177 /* baud rate information */ 178 struct divisor_table_entry { 179 __u32 BaudRate; 180 __u16 Divisor; 181 }; 182 183 // 184 // Define table of divisors for Rev A EdgePort/4 hardware 185 // These assume a 3.6864MHz crystal, the standard /16, and 186 // MCR.7 = 0. 187 // 188 static const struct divisor_table_entry divisor_table[] = { 189 { 50, 4608}, 190 { 75, 3072}, 191 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 192 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 193 { 150, 1536}, 194 { 300, 768}, 195 { 600, 384}, 196 { 1200, 192}, 197 { 1800, 128}, 198 { 2400, 96}, 199 { 4800, 48}, 200 { 7200, 32}, 201 { 9600, 24}, 202 { 14400, 16}, 203 { 19200, 12}, 204 { 38400, 6}, 205 { 57600, 4}, 206 { 115200, 2}, 207 { 230400, 1}, 208 }; 209 210 /* local variables */ 211 static int debug; 212 213 static int low_latency = 1; /* tty low latency flag, on by default */ 214 215 static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */ 216 217 218 /* local function prototypes */ 219 220 /* function prototypes for all URB callbacks */ 221 static void edge_interrupt_callback (struct urb *urb); 222 static void edge_bulk_in_callback (struct urb *urb); 223 static void edge_bulk_out_data_callback (struct urb *urb); 224 static void edge_bulk_out_cmd_callback (struct urb *urb); 225 226 /* function prototypes for the usbserial callbacks */ 227 static int edge_open (struct usb_serial_port *port, struct file *filp); 228 static void edge_close (struct usb_serial_port *port, struct file *filp); 229 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count); 230 static int edge_write_room (struct usb_serial_port *port); 231 static int edge_chars_in_buffer (struct usb_serial_port *port); 232 static void edge_throttle (struct usb_serial_port *port); 233 static void edge_unthrottle (struct usb_serial_port *port); 234 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios); 235 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 236 static void edge_break (struct usb_serial_port *port, int break_state); 237 static int edge_tiocmget (struct usb_serial_port *port, struct file *file); 238 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 239 static int edge_startup (struct usb_serial *serial); 240 static void edge_shutdown (struct usb_serial *serial); 241 242 243 #include "io_tables.h" /* all of the devices that this driver supports */ 244 245 /* function prototypes for all of our local functions */ 246 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); 247 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); 248 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length); 249 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr); 250 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); 251 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param); 252 static int calc_baud_rate_divisor (int baud_rate, int *divisor); 253 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate); 254 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios); 255 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue); 256 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength); 257 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port); 258 259 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 260 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 261 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); 262 static void get_manufacturing_desc (struct edgeport_serial *edge_serial); 263 static void get_boot_desc (struct edgeport_serial *edge_serial); 264 static void load_application_firmware (struct edgeport_serial *edge_serial); 265 266 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size); 267 268 269 // ************************************************************************ 270 // ************************************************************************ 271 // ************************************************************************ 272 // ************************************************************************ 273 274 /************************************************************************ 275 * * 276 * update_edgeport_E2PROM() Compare current versions of * 277 * Boot ROM and Manufacture * 278 * Descriptors with versions * 279 * embedded in this driver * 280 * * 281 ************************************************************************/ 282 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) 283 { 284 __u32 BootCurVer; 285 __u32 BootNewVer; 286 __u8 BootMajorVersion; 287 __u8 BootMinorVersion; 288 __le16 BootBuildNumber; 289 __u8 *BootImage; 290 __u32 BootSize; 291 struct edge_firmware_image_record *record; 292 unsigned char *firmware; 293 int response; 294 295 296 switch (edge_serial->product_info.iDownloadFile) { 297 case EDGE_DOWNLOAD_FILE_I930: 298 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion; 299 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion; 300 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber); 301 BootImage = &BootCodeImage_GEN1[0]; 302 BootSize = sizeof( BootCodeImage_GEN1 ); 303 break; 304 305 case EDGE_DOWNLOAD_FILE_80251: 306 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion; 307 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion; 308 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber); 309 BootImage = &BootCodeImage_GEN2[0]; 310 BootSize = sizeof( BootCodeImage_GEN2 ); 311 break; 312 313 default: 314 return; 315 } 316 317 // Check Boot Image Version 318 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 319 (edge_serial->boot_descriptor.MinorVersion << 16) + 320 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 321 322 BootNewVer = (BootMajorVersion << 24) + 323 (BootMinorVersion << 16) + 324 le16_to_cpu(BootBuildNumber); 325 326 dbg("Current Boot Image version %d.%d.%d", 327 edge_serial->boot_descriptor.MajorVersion, 328 edge_serial->boot_descriptor.MinorVersion, 329 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 330 331 332 if (BootNewVer > BootCurVer) { 333 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 334 edge_serial->boot_descriptor.MajorVersion, 335 edge_serial->boot_descriptor.MinorVersion, 336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 337 BootMajorVersion, 338 BootMinorVersion, 339 le16_to_cpu(BootBuildNumber)); 340 341 342 dbg("Downloading new Boot Image"); 343 344 firmware = BootImage; 345 346 for (;;) { 347 record = (struct edge_firmware_image_record *)firmware; 348 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 349 if (response < 0) { 350 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 351 break; 352 } 353 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 354 if (firmware >= &BootImage[BootSize]) { 355 break; 356 } 357 } 358 } else { 359 dbg("Boot Image -- already up to date"); 360 } 361 } 362 363 364 /************************************************************************ 365 * * 366 * Get string descriptor from device * 367 * * 368 ************************************************************************/ 369 static int get_string (struct usb_device *dev, int Id, char *string, int buflen) 370 { 371 struct usb_string_descriptor StringDesc; 372 struct usb_string_descriptor *pStringDesc; 373 374 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 375 376 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 377 return 0; 378 } 379 380 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 381 382 if (!pStringDesc) { 383 return 0; 384 } 385 386 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 387 kfree(pStringDesc); 388 return 0; 389 } 390 391 unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2); 392 393 kfree(pStringDesc); 394 dbg("%s - USB String %s", __FUNCTION__, string); 395 return strlen(string); 396 } 397 398 399 #if 0 400 /************************************************************************ 401 * 402 * Get string descriptor from device 403 * 404 ************************************************************************/ 405 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc) 406 { 407 struct usb_string_descriptor StringDesc; 408 struct usb_string_descriptor *pStringDesc; 409 410 dbg("%s - USB String ID = %d", __FUNCTION__, Id ); 411 412 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { 413 return 0; 414 } 415 416 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); 417 418 if (!pStringDesc) { 419 return -1; 420 } 421 422 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { 423 kfree(pStringDesc); 424 return -1; 425 } 426 427 *pRetDesc = pStringDesc; 428 return 0; 429 } 430 #endif 431 432 static void dump_product_info(struct edgeport_product_info *product_info) 433 { 434 // Dump Product Info structure 435 dbg("**Product Information:"); 436 dbg(" ProductId %x", product_info->ProductId ); 437 dbg(" NumPorts %d", product_info->NumPorts ); 438 dbg(" ProdInfoVer %d", product_info->ProdInfoVer ); 439 dbg(" IsServer %d", product_info->IsServer); 440 dbg(" IsRS232 %d", product_info->IsRS232 ); 441 dbg(" IsRS422 %d", product_info->IsRS422 ); 442 dbg(" IsRS485 %d", product_info->IsRS485 ); 443 dbg(" RomSize %d", product_info->RomSize ); 444 dbg(" RamSize %d", product_info->RamSize ); 445 dbg(" CpuRev %x", product_info->CpuRev ); 446 dbg(" BoardRev %x", product_info->BoardRev); 447 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 448 product_info->BootMinorVersion, 449 le16_to_cpu(product_info->BootBuildNumber)); 450 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion, 451 product_info->FirmwareMinorVersion, 452 le16_to_cpu(product_info->FirmwareBuildNumber)); 453 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0], 454 product_info->ManufactureDescDate[1], 455 product_info->ManufactureDescDate[2]+1900); 456 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 457 dbg(" EpicVer %d", product_info->EpicVer); 458 } 459 460 static void get_product_info(struct edgeport_serial *edge_serial) 461 { 462 struct edgeport_product_info *product_info = &edge_serial->product_info; 463 464 memset (product_info, 0, sizeof(struct edgeport_product_info)); 465 466 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 467 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 468 product_info->ProdInfoVer = 0; 469 470 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 471 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 472 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 473 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 474 475 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion; 476 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion; 477 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber; 478 479 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate)); 480 481 // check if this is 2nd generation hardware 482 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) { 483 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion; 484 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion; 485 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber); 486 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 487 } else { 488 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion; 489 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion; 490 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber); 491 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 492 } 493 494 // Determine Product type and set appropriate flags 495 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 496 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 497 case ION_DEVICE_ID_EDGEPORT_4T: 498 case ION_DEVICE_ID_EDGEPORT_4: 499 case ION_DEVICE_ID_EDGEPORT_2: 500 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 501 case ION_DEVICE_ID_EDGEPORT_8: 502 case ION_DEVICE_ID_EDGEPORT_421: 503 case ION_DEVICE_ID_EDGEPORT_21: 504 case ION_DEVICE_ID_EDGEPORT_2_DIN: 505 case ION_DEVICE_ID_EDGEPORT_4_DIN: 506 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 507 product_info->IsRS232 = 1; 508 break; 509 510 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485 511 product_info->IsRS422 = 1; 512 product_info->IsRS485 = 1; 513 break; 514 515 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422 516 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422 517 product_info->IsRS422 = 1; 518 break; 519 } 520 521 dump_product_info(product_info); 522 } 523 524 static int get_epic_descriptor(struct edgeport_serial *ep) 525 { 526 int result; 527 struct usb_serial *serial = ep->serial; 528 struct edgeport_product_info *product_info = &ep->product_info; 529 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 530 struct edge_compatibility_bits *bits; 531 532 ep->is_epic = 0; 533 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 534 USB_REQUEST_ION_GET_EPIC_DESC, 535 0xC0, 0x00, 0x00, 536 &ep->epic_descriptor, 537 sizeof(struct edge_compatibility_descriptor), 538 300); 539 540 dbg("%s result = %d", __FUNCTION__, result); 541 542 if (result > 0) { 543 ep->is_epic = 1; 544 memset(product_info, 0, sizeof(struct edgeport_product_info)); 545 546 product_info->NumPorts = epic->NumPorts; 547 product_info->ProdInfoVer = 0; 548 product_info->FirmwareMajorVersion = epic->MajorVersion; 549 product_info->FirmwareMinorVersion = epic->MinorVersion; 550 product_info->FirmwareBuildNumber = epic->BuildNumber; 551 product_info->iDownloadFile = epic->iDownloadFile; 552 product_info->EpicVer = epic->EpicVer; 553 product_info->Epic = epic->Supports; 554 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 555 dump_product_info(product_info); 556 557 bits = &ep->epic_descriptor.Supports; 558 dbg("**EPIC descriptor:"); 559 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE"); 560 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE" ); 561 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE" ); 562 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE" ); 563 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE" ); 564 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE" ); 565 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE" ); 566 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE" ); 567 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE" ); 568 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE" ); 569 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE" ); 570 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE" ); 571 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE" ); 572 } 573 574 return result; 575 } 576 577 578 /************************************************************************/ 579 /************************************************************************/ 580 /* U S B C A L L B A C K F U N C T I O N S */ 581 /* U S B C A L L B A C K F U N C T I O N S */ 582 /************************************************************************/ 583 /************************************************************************/ 584 585 /***************************************************************************** 586 * edge_interrupt_callback 587 * this is the callback function for when we have received data on the 588 * interrupt endpoint. 589 *****************************************************************************/ 590 static void edge_interrupt_callback (struct urb *urb) 591 { 592 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 593 struct edgeport_port *edge_port; 594 struct usb_serial_port *port; 595 unsigned char *data = urb->transfer_buffer; 596 int length = urb->actual_length; 597 int bytes_avail; 598 int position; 599 int txCredits; 600 int portNumber; 601 int result; 602 int status = urb->status; 603 604 dbg("%s", __FUNCTION__); 605 606 switch (status) { 607 case 0: 608 /* success */ 609 break; 610 case -ECONNRESET: 611 case -ENOENT: 612 case -ESHUTDOWN: 613 /* this urb is terminated, clean up */ 614 dbg("%s - urb shutting down with status: %d", 615 __FUNCTION__, status); 616 return; 617 default: 618 dbg("%s - nonzero urb status received: %d", 619 __FUNCTION__, status); 620 goto exit; 621 } 622 623 // process this interrupt-read even if there are no ports open 624 if (length) { 625 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data); 626 627 if (length > 1) { 628 bytes_avail = data[0] | (data[1] << 8); 629 if (bytes_avail) { 630 spin_lock(&edge_serial->es_lock); 631 edge_serial->rxBytesAvail += bytes_avail; 632 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 633 634 if (edge_serial->rxBytesAvail > 0 && 635 !edge_serial->read_in_progress) { 636 dbg("%s - posting a read", __FUNCTION__); 637 edge_serial->read_in_progress = true; 638 639 /* we have pending bytes on the bulk in pipe, send a request */ 640 edge_serial->read_urb->dev = edge_serial->serial->dev; 641 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 642 if (result) { 643 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result); 644 edge_serial->read_in_progress = false; 645 } 646 } 647 spin_unlock(&edge_serial->es_lock); 648 } 649 } 650 /* grab the txcredits for the ports if available */ 651 position = 2; 652 portNumber = 0; 653 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { 654 txCredits = data[position] | (data[position+1] << 8); 655 if (txCredits) { 656 port = edge_serial->serial->port[portNumber]; 657 edge_port = usb_get_serial_port_data(port); 658 if (edge_port->open) { 659 spin_lock(&edge_port->ep_lock); 660 edge_port->txCredits += txCredits; 661 spin_unlock(&edge_port->ep_lock); 662 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); 663 664 /* tell the tty driver that something has changed */ 665 if (edge_port->port->tty) 666 tty_wakeup(edge_port->port->tty); 667 668 // Since we have more credit, check if more data can be sent 669 send_more_port_data(edge_serial, edge_port); 670 } 671 } 672 position += 2; 673 ++portNumber; 674 } 675 } 676 677 exit: 678 result = usb_submit_urb (urb, GFP_ATOMIC); 679 if (result) { 680 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result); 681 } 682 } 683 684 685 /***************************************************************************** 686 * edge_bulk_in_callback 687 * this is the callback function for when we have received data on the 688 * bulk in endpoint. 689 *****************************************************************************/ 690 static void edge_bulk_in_callback (struct urb *urb) 691 { 692 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 693 unsigned char *data = urb->transfer_buffer; 694 int retval; 695 __u16 raw_data_length; 696 int status = urb->status; 697 698 dbg("%s", __FUNCTION__); 699 700 if (status) { 701 dbg("%s - nonzero read bulk status received: %d", 702 __FUNCTION__, status); 703 edge_serial->read_in_progress = false; 704 return; 705 } 706 707 if (urb->actual_length == 0) { 708 dbg("%s - read bulk callback with no data", __FUNCTION__); 709 edge_serial->read_in_progress = false; 710 return; 711 } 712 713 raw_data_length = urb->actual_length; 714 715 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data); 716 717 spin_lock(&edge_serial->es_lock); 718 719 /* decrement our rxBytes available by the number that we just got */ 720 edge_serial->rxBytesAvail -= raw_data_length; 721 722 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); 723 724 process_rcvd_data (edge_serial, data, urb->actual_length); 725 726 /* check to see if there's any more data for us to read */ 727 if (edge_serial->rxBytesAvail > 0) { 728 dbg("%s - posting a read", __FUNCTION__); 729 edge_serial->read_urb->dev = edge_serial->serial->dev; 730 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 731 if (retval) { 732 dev_err(&urb->dev->dev, 733 "%s - usb_submit_urb(read bulk) failed, " 734 "retval = %d\n", __FUNCTION__, retval); 735 edge_serial->read_in_progress = false; 736 } 737 } else { 738 edge_serial->read_in_progress = false; 739 } 740 741 spin_unlock(&edge_serial->es_lock); 742 } 743 744 745 /***************************************************************************** 746 * edge_bulk_out_data_callback 747 * this is the callback function for when we have finished sending serial data 748 * on the bulk out endpoint. 749 *****************************************************************************/ 750 static void edge_bulk_out_data_callback (struct urb *urb) 751 { 752 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 753 struct tty_struct *tty; 754 int status = urb->status; 755 756 dbg("%s", __FUNCTION__); 757 758 if (status) { 759 dbg("%s - nonzero write bulk status received: %d", 760 __FUNCTION__, status); 761 } 762 763 tty = edge_port->port->tty; 764 765 if (tty && edge_port->open) { 766 /* let the tty driver wakeup if it has a special write_wakeup function */ 767 tty_wakeup(tty); 768 } 769 770 // Release the Write URB 771 edge_port->write_in_progress = false; 772 773 // Check if more data needs to be sent 774 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port); 775 } 776 777 778 /***************************************************************************** 779 * BulkOutCmdCallback 780 * this is the callback function for when we have finished sending a command 781 * on the bulk out endpoint. 782 *****************************************************************************/ 783 static void edge_bulk_out_cmd_callback (struct urb *urb) 784 { 785 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 786 struct tty_struct *tty; 787 int status = urb->status; 788 789 dbg("%s", __FUNCTION__); 790 791 atomic_dec(&CmdUrbs); 792 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs)); 793 794 795 /* clean up the transfer buffer */ 796 kfree(urb->transfer_buffer); 797 798 /* Free the command urb */ 799 usb_free_urb (urb); 800 801 if (status) { 802 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); 803 return; 804 } 805 806 /* Get pointer to tty */ 807 tty = edge_port->port->tty; 808 809 /* tell the tty driver that something has changed */ 810 if (tty && edge_port->open) 811 tty_wakeup(tty); 812 813 /* we have completed the command */ 814 edge_port->commandPending = false; 815 wake_up(&edge_port->wait_command); 816 } 817 818 819 /***************************************************************************** 820 * Driver tty interface functions 821 *****************************************************************************/ 822 823 /***************************************************************************** 824 * SerialOpen 825 * this function is called by the tty driver when a port is opened 826 * If successful, we return 0 827 * Otherwise we return a negative error number. 828 *****************************************************************************/ 829 static int edge_open (struct usb_serial_port *port, struct file * filp) 830 { 831 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 832 struct usb_serial *serial; 833 struct edgeport_serial *edge_serial; 834 int response; 835 836 dbg("%s - port %d", __FUNCTION__, port->number); 837 838 if (edge_port == NULL) 839 return -ENODEV; 840 841 if (port->tty) 842 port->tty->low_latency = low_latency; 843 844 /* see if we've set up our endpoint info yet (can't set it up in edge_startup 845 as the structures were not set up at that time.) */ 846 serial = port->serial; 847 edge_serial = usb_get_serial_data(serial); 848 if (edge_serial == NULL) { 849 return -ENODEV; 850 } 851 if (edge_serial->interrupt_in_buffer == NULL) { 852 struct usb_serial_port *port0 = serial->port[0]; 853 854 /* not set up yet, so do it now */ 855 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; 856 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; 857 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 858 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 859 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; 860 edge_serial->read_urb = port0->read_urb; 861 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; 862 863 /* set up our interrupt urb */ 864 usb_fill_int_urb(edge_serial->interrupt_read_urb, 865 serial->dev, 866 usb_rcvintpipe(serial->dev, 867 port0->interrupt_in_endpointAddress), 868 port0->interrupt_in_buffer, 869 edge_serial->interrupt_read_urb->transfer_buffer_length, 870 edge_interrupt_callback, edge_serial, 871 edge_serial->interrupt_read_urb->interval); 872 873 /* set up our bulk in urb */ 874 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 875 usb_rcvbulkpipe(serial->dev, 876 port0->bulk_in_endpointAddress), 877 port0->bulk_in_buffer, 878 edge_serial->read_urb->transfer_buffer_length, 879 edge_bulk_in_callback, edge_serial); 880 edge_serial->read_in_progress = false; 881 882 /* start interrupt read for this edgeport 883 * this interrupt will continue as long as the edgeport is connected */ 884 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL); 885 if (response) { 886 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response); 887 } 888 } 889 890 /* initialize our wait queues */ 891 init_waitqueue_head(&edge_port->wait_open); 892 init_waitqueue_head(&edge_port->wait_chase); 893 init_waitqueue_head(&edge_port->delta_msr_wait); 894 init_waitqueue_head(&edge_port->wait_command); 895 896 /* initialize our icount structure */ 897 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 898 899 /* initialize our port settings */ 900 edge_port->txCredits = 0; /* Can't send any data yet */ 901 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ 902 edge_port->chaseResponsePending = false; 903 904 /* send a open port command */ 905 edge_port->openPending = true; 906 edge_port->open = false; 907 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); 908 909 if (response < 0) { 910 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__); 911 edge_port->openPending = false; 912 return -ENODEV; 913 } 914 915 /* now wait for the port to be completely opened */ 916 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, OPEN_TIMEOUT); 917 918 if (!edge_port->open) { 919 /* open timed out */ 920 dbg("%s - open timedout", __FUNCTION__); 921 edge_port->openPending = false; 922 return -ENODEV; 923 } 924 925 /* create the txfifo */ 926 edge_port->txfifo.head = 0; 927 edge_port->txfifo.tail = 0; 928 edge_port->txfifo.count = 0; 929 edge_port->txfifo.size = edge_port->maxTxCredits; 930 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL); 931 932 if (!edge_port->txfifo.fifo) { 933 dbg("%s - no memory", __FUNCTION__); 934 edge_close (port, filp); 935 return -ENOMEM; 936 } 937 938 /* Allocate a URB for the write */ 939 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL); 940 edge_port->write_in_progress = false; 941 942 if (!edge_port->write_urb) { 943 dbg("%s - no memory", __FUNCTION__); 944 edge_close (port, filp); 945 return -ENOMEM; 946 } 947 948 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); 949 950 dbg("%s exited", __FUNCTION__); 951 952 return 0; 953 } 954 955 956 /************************************************************************ 957 * 958 * block_until_chase_response 959 * 960 * This function will block the close until one of the following: 961 * 1. Response to our Chase comes from Edgeport 962 * 2. A timout of 10 seconds without activity has expired 963 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 964 * 965 ************************************************************************/ 966 static void block_until_chase_response(struct edgeport_port *edge_port) 967 { 968 DEFINE_WAIT(wait); 969 __u16 lastCredits; 970 int timeout = 1*HZ; 971 int loop = 10; 972 973 while (1) { 974 // Save Last credits 975 lastCredits = edge_port->txCredits; 976 977 // Did we get our Chase response 978 if (!edge_port->chaseResponsePending) { 979 dbg("%s - Got Chase Response", __FUNCTION__); 980 981 // did we get all of our credit back? 982 if (edge_port->txCredits == edge_port->maxTxCredits ) { 983 dbg("%s - Got all credits", __FUNCTION__); 984 return; 985 } 986 } 987 988 // Block the thread for a while 989 prepare_to_wait(&edge_port->wait_chase, &wait, 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", __FUNCTION__); 999 return; 1000 } 1001 } else { 1002 // Reset timout value back to 10 seconds 1003 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); 1004 loop = 10; 1005 } 1006 } 1007 } 1008 1009 1010 /************************************************************************ 1011 * 1012 * block_until_tx_empty 1013 * 1014 * This function will block the close until one of the following: 1015 * 1. TX count are 0 1016 * 2. The edgeport has stopped 1017 * 3. A timout of 3 seconds without activity has expired 1018 * 1019 ************************************************************************/ 1020 static void block_until_tx_empty (struct edgeport_port *edge_port) 1021 { 1022 DEFINE_WAIT(wait); 1023 struct TxFifo *fifo = &edge_port->txfifo; 1024 __u32 lastCount; 1025 int timeout = HZ/10; 1026 int loop = 30; 1027 1028 while (1) { 1029 // Save Last count 1030 lastCount = fifo->count; 1031 1032 // Is the Edgeport Buffer empty? 1033 if (lastCount == 0) { 1034 dbg("%s - TX Buffer Empty", __FUNCTION__); 1035 return; 1036 } 1037 1038 // Block the thread for a while 1039 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 1040 schedule_timeout(timeout); 1041 finish_wait(&edge_port->wait_chase, &wait); 1042 1043 dbg("%s wait", __FUNCTION__); 1044 1045 if (lastCount == fifo->count) { 1046 // No activity.. count down. 1047 loop--; 1048 if (loop == 0) { 1049 dbg("%s - TIMEOUT", __FUNCTION__); 1050 return; 1051 } 1052 } else { 1053 // Reset timout value back to seconds 1054 loop = 30; 1055 } 1056 } 1057 } 1058 1059 1060 /***************************************************************************** 1061 * edge_close 1062 * this function is called by the tty driver when a port is closed 1063 *****************************************************************************/ 1064 static void edge_close (struct usb_serial_port *port, struct file * filp) 1065 { 1066 struct edgeport_serial *edge_serial; 1067 struct edgeport_port *edge_port; 1068 int status; 1069 1070 dbg("%s - port %d", __FUNCTION__, port->number); 1071 1072 edge_serial = usb_get_serial_data(port->serial); 1073 edge_port = usb_get_serial_port_data(port); 1074 if ((edge_serial == NULL) || (edge_port == NULL)) 1075 return; 1076 1077 // block until tx is empty 1078 block_until_tx_empty(edge_port); 1079 1080 edge_port->closePending = true; 1081 1082 if ((!edge_serial->is_epic) || 1083 ((edge_serial->is_epic) && 1084 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1085 /* flush and chase */ 1086 edge_port->chaseResponsePending = true; 1087 1088 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1089 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1090 if (status == 0) { 1091 // block until chase finished 1092 block_until_chase_response(edge_port); 1093 } else { 1094 edge_port->chaseResponsePending = false; 1095 } 1096 } 1097 1098 if ((!edge_serial->is_epic) || 1099 ((edge_serial->is_epic) && 1100 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1101 /* close the port */ 1102 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); 1103 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); 1104 } 1105 1106 //port->close = true; 1107 edge_port->closePending = false; 1108 edge_port->open = false; 1109 edge_port->openPending = false; 1110 1111 usb_kill_urb(edge_port->write_urb); 1112 1113 if (edge_port->write_urb) { 1114 /* if this urb had a transfer buffer already (old transfer) free it */ 1115 kfree(edge_port->write_urb->transfer_buffer); 1116 usb_free_urb(edge_port->write_urb); 1117 edge_port->write_urb = NULL; 1118 } 1119 kfree(edge_port->txfifo.fifo); 1120 edge_port->txfifo.fifo = NULL; 1121 1122 dbg("%s exited", __FUNCTION__); 1123 } 1124 1125 /***************************************************************************** 1126 * SerialWrite 1127 * this function is called by the tty driver when data should be written to 1128 * the port. 1129 * If successful, we return the number of bytes written, otherwise we return 1130 * a negative error number. 1131 *****************************************************************************/ 1132 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count) 1133 { 1134 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1135 struct TxFifo *fifo; 1136 int copySize; 1137 int bytesleft; 1138 int firsthalf; 1139 int secondhalf; 1140 unsigned long flags; 1141 1142 dbg("%s - port %d", __FUNCTION__, port->number); 1143 1144 if (edge_port == NULL) 1145 return -ENODEV; 1146 1147 // get a pointer to the Tx fifo 1148 fifo = &edge_port->txfifo; 1149 1150 spin_lock_irqsave(&edge_port->ep_lock, flags); 1151 1152 // calculate number of bytes to put in fifo 1153 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); 1154 1155 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, 1156 port->number, count, edge_port->txCredits - fifo->count, copySize); 1157 1158 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ 1159 if (copySize == 0) { 1160 dbg("%s - copySize = Zero", __FUNCTION__); 1161 goto finish_write; 1162 } 1163 1164 // queue the data 1165 // since we can never overflow the buffer we do not have to check for full condition 1166 1167 // the copy is done is two parts -- first fill to the end of the buffer 1168 // then copy the reset from the start of the buffer 1169 1170 bytesleft = fifo->size - fifo->head; 1171 firsthalf = min (bytesleft, copySize); 1172 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); 1173 1174 /* now copy our data */ 1175 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1176 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]); 1177 1178 // update the index and size 1179 fifo->head += firsthalf; 1180 fifo->count += firsthalf; 1181 1182 // wrap the index 1183 if (fifo->head == fifo->size) { 1184 fifo->head = 0; 1185 } 1186 1187 secondhalf = copySize-firsthalf; 1188 1189 if (secondhalf) { 1190 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); 1191 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1192 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]); 1193 // update the index and size 1194 fifo->count += secondhalf; 1195 fifo->head += secondhalf; 1196 // No need to check for wrap since we can not get to end of fifo in this part 1197 } 1198 1199 finish_write: 1200 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1201 1202 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port); 1203 1204 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); 1205 1206 return copySize; 1207 } 1208 1209 1210 /************************************************************************ 1211 * 1212 * send_more_port_data() 1213 * 1214 * This routine attempts to write additional UART transmit data 1215 * to a port over the USB bulk pipe. It is called (1) when new 1216 * data has been written to a port's TxBuffer from higher layers 1217 * (2) when the peripheral sends us additional TxCredits indicating 1218 * that it can accept more Tx data for a given port; and (3) when 1219 * a bulk write completes successfully and we want to see if we 1220 * can transmit more. 1221 * 1222 ************************************************************************/ 1223 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) 1224 { 1225 struct TxFifo *fifo = &edge_port->txfifo; 1226 struct urb *urb; 1227 unsigned char *buffer; 1228 int status; 1229 int count; 1230 int bytesleft; 1231 int firsthalf; 1232 int secondhalf; 1233 unsigned long flags; 1234 1235 dbg("%s(%d)", __FUNCTION__, edge_port->port->number); 1236 1237 spin_lock_irqsave(&edge_port->ep_lock, flags); 1238 1239 if (edge_port->write_in_progress || 1240 !edge_port->open || 1241 (fifo->count == 0)) { 1242 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); 1243 goto exit_send; 1244 } 1245 1246 // since the amount of data in the fifo will always fit into the 1247 // edgeport buffer we do not need to check the write length 1248 1249 // Do we have enough credits for this port to make it worthwhile 1250 // to bother queueing a write. If it's too small, say a few bytes, 1251 // it's better to wait for more credits so we can do a larger 1252 // write. 1253 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1254 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); 1255 goto exit_send; 1256 } 1257 1258 // lock this write 1259 edge_port->write_in_progress = true; 1260 1261 // get a pointer to the write_urb 1262 urb = edge_port->write_urb; 1263 1264 /* make sure transfer buffer is freed */ 1265 kfree(urb->transfer_buffer); 1266 urb->transfer_buffer = NULL; 1267 1268 /* build the data header for the buffer and port that we are about to send out */ 1269 count = fifo->count; 1270 buffer = kmalloc (count+2, GFP_ATOMIC); 1271 if (buffer == NULL) { 1272 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__); 1273 edge_port->write_in_progress = false; 1274 goto exit_send; 1275 } 1276 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); 1277 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); 1278 1279 /* now copy our data */ 1280 bytesleft = fifo->size - fifo->tail; 1281 firsthalf = min (bytesleft, count); 1282 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1283 fifo->tail += firsthalf; 1284 fifo->count -= firsthalf; 1285 if (fifo->tail == fifo->size) { 1286 fifo->tail = 0; 1287 } 1288 1289 secondhalf = count-firsthalf; 1290 if (secondhalf) { 1291 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); 1292 fifo->tail += secondhalf; 1293 fifo->count -= secondhalf; 1294 } 1295 1296 if (count) 1297 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]); 1298 1299 /* fill up the urb with all of our data and submit it */ 1300 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 1301 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 1302 buffer, count+2, edge_bulk_out_data_callback, edge_port); 1303 1304 /* decrement the number of credits we have by the number we just sent */ 1305 edge_port->txCredits -= count; 1306 edge_port->icount.tx += count; 1307 1308 urb->dev = edge_serial->serial->dev; 1309 status = usb_submit_urb(urb, GFP_ATOMIC); 1310 if (status) { 1311 /* something went wrong */ 1312 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status); 1313 edge_port->write_in_progress = false; 1314 1315 /* revert the credits as something bad happened. */ 1316 edge_port->txCredits += count; 1317 edge_port->icount.tx -= count; 1318 } 1319 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); 1320 1321 exit_send: 1322 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1323 } 1324 1325 1326 /***************************************************************************** 1327 * edge_write_room 1328 * this function is called by the tty driver when it wants to know how many 1329 * bytes of data we can accept for a specific port. 1330 * If successful, we return the amount of room that we have for this port 1331 * (the txCredits), 1332 * Otherwise we return a negative error number. 1333 *****************************************************************************/ 1334 static int edge_write_room (struct usb_serial_port *port) 1335 { 1336 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1337 int room; 1338 unsigned long flags; 1339 1340 dbg("%s", __FUNCTION__); 1341 1342 if (edge_port == NULL) 1343 return -ENODEV; 1344 if (edge_port->closePending) 1345 return -ENODEV; 1346 1347 dbg("%s - port %d", __FUNCTION__, port->number); 1348 1349 if (!edge_port->open) { 1350 dbg("%s - port not opened", __FUNCTION__); 1351 return -EINVAL; 1352 } 1353 1354 // total of both buffers is still txCredit 1355 spin_lock_irqsave(&edge_port->ep_lock, flags); 1356 room = edge_port->txCredits - edge_port->txfifo.count; 1357 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1358 1359 dbg("%s - returns %d", __FUNCTION__, room); 1360 return room; 1361 } 1362 1363 1364 /***************************************************************************** 1365 * edge_chars_in_buffer 1366 * this function is called by the tty driver when it wants to know how many 1367 * bytes of data we currently have outstanding in the port (data that has 1368 * been written, but hasn't made it out the port yet) 1369 * If successful, we return the number of bytes left to be written in the 1370 * system, 1371 * Otherwise we return a negative error number. 1372 *****************************************************************************/ 1373 static int edge_chars_in_buffer (struct usb_serial_port *port) 1374 { 1375 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1376 int num_chars; 1377 unsigned long flags; 1378 1379 dbg("%s", __FUNCTION__); 1380 1381 if (edge_port == NULL) 1382 return -ENODEV; 1383 if (edge_port->closePending) 1384 return -ENODEV; 1385 1386 if (!edge_port->open) { 1387 dbg("%s - port not opened", __FUNCTION__); 1388 return -EINVAL; 1389 } 1390 1391 spin_lock_irqsave(&edge_port->ep_lock, flags); 1392 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; 1393 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1394 if (num_chars) { 1395 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); 1396 } 1397 1398 return num_chars; 1399 } 1400 1401 1402 /***************************************************************************** 1403 * SerialThrottle 1404 * this function is called by the tty driver when it wants to stop the data 1405 * being read from the port. 1406 *****************************************************************************/ 1407 static void edge_throttle (struct usb_serial_port *port) 1408 { 1409 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1410 struct tty_struct *tty; 1411 int status; 1412 1413 dbg("%s - port %d", __FUNCTION__, port->number); 1414 1415 if (edge_port == NULL) 1416 return; 1417 1418 if (!edge_port->open) { 1419 dbg("%s - port not opened", __FUNCTION__); 1420 return; 1421 } 1422 1423 tty = port->tty; 1424 if (!tty) { 1425 dbg ("%s - no tty available", __FUNCTION__); 1426 return; 1427 } 1428 1429 /* if we are implementing XON/XOFF, send the stop character */ 1430 if (I_IXOFF(tty)) { 1431 unsigned char stop_char = STOP_CHAR(tty); 1432 status = edge_write (port, &stop_char, 1); 1433 if (status <= 0) { 1434 return; 1435 } 1436 } 1437 1438 /* if we are implementing RTS/CTS, toggle that line */ 1439 if (tty->termios->c_cflag & CRTSCTS) { 1440 edge_port->shadowMCR &= ~MCR_RTS; 1441 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1442 if (status != 0) { 1443 return; 1444 } 1445 } 1446 1447 return; 1448 } 1449 1450 1451 /***************************************************************************** 1452 * edge_unthrottle 1453 * this function is called by the tty driver when it wants to resume the data 1454 * being read from the port (called after SerialThrottle is called) 1455 *****************************************************************************/ 1456 static void edge_unthrottle (struct usb_serial_port *port) 1457 { 1458 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1459 struct tty_struct *tty; 1460 int status; 1461 1462 dbg("%s - port %d", __FUNCTION__, port->number); 1463 1464 if (edge_port == NULL) 1465 return; 1466 1467 if (!edge_port->open) { 1468 dbg("%s - port not opened", __FUNCTION__); 1469 return; 1470 } 1471 1472 tty = port->tty; 1473 if (!tty) { 1474 dbg ("%s - no tty available", __FUNCTION__); 1475 return; 1476 } 1477 1478 /* if we are implementing XON/XOFF, send the start character */ 1479 if (I_IXOFF(tty)) { 1480 unsigned char start_char = START_CHAR(tty); 1481 status = edge_write (port, &start_char, 1); 1482 if (status <= 0) { 1483 return; 1484 } 1485 } 1486 1487 /* if we are implementing RTS/CTS, toggle that line */ 1488 if (tty->termios->c_cflag & CRTSCTS) { 1489 edge_port->shadowMCR |= MCR_RTS; 1490 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1491 if (status != 0) { 1492 return; 1493 } 1494 } 1495 1496 return; 1497 } 1498 1499 1500 /***************************************************************************** 1501 * SerialSetTermios 1502 * this function is called by the tty driver when it wants to change the termios structure 1503 *****************************************************************************/ 1504 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 1505 { 1506 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1507 struct tty_struct *tty = port->tty; 1508 unsigned int cflag; 1509 1510 if (!port->tty || !port->tty->termios) { 1511 dbg ("%s - no tty or termios", __FUNCTION__); 1512 return; 1513 } 1514 1515 cflag = tty->termios->c_cflag; 1516 dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 1517 tty->termios->c_cflag, tty->termios->c_iflag); 1518 if (old_termios) { 1519 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, 1520 old_termios->c_cflag, old_termios->c_iflag); 1521 } 1522 1523 dbg("%s - port %d", __FUNCTION__, port->number); 1524 1525 if (edge_port == NULL) 1526 return; 1527 1528 if (!edge_port->open) { 1529 dbg("%s - port not opened", __FUNCTION__); 1530 return; 1531 } 1532 1533 /* change the port settings to the new ones specified */ 1534 change_port_settings (edge_port, old_termios); 1535 1536 return; 1537 } 1538 1539 1540 /***************************************************************************** 1541 * get_lsr_info - get line status register info 1542 * 1543 * Purpose: Let user call ioctl() to get info when the UART physically 1544 * is emptied. On bus types like RS485, the transmitter must 1545 * release the bus after transmitting. This must be done when 1546 * the transmit shift register is empty, not be done when the 1547 * transmit holding register is empty. This functionality 1548 * allows an RS485 driver to be written in user space. 1549 *****************************************************************************/ 1550 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value) 1551 { 1552 unsigned int result = 0; 1553 unsigned long flags; 1554 1555 spin_lock_irqsave(&edge_port->ep_lock, flags); 1556 if (edge_port->maxTxCredits == edge_port->txCredits && 1557 edge_port->txfifo.count == 0) { 1558 dbg("%s -- Empty", __FUNCTION__); 1559 result = TIOCSER_TEMT; 1560 } 1561 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1562 1563 if (copy_to_user(value, &result, sizeof(int))) 1564 return -EFAULT; 1565 return 0; 1566 } 1567 1568 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value) 1569 { 1570 unsigned int result = 0; 1571 struct tty_struct *tty = edge_port->port->tty; 1572 1573 if (!tty) 1574 return -ENOIOCTLCMD; 1575 1576 result = tty->read_cnt; 1577 1578 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result); 1579 if (copy_to_user(value, &result, sizeof(int))) 1580 return -EFAULT; 1581 //return 0; 1582 return -ENOIOCTLCMD; 1583 } 1584 1585 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) 1586 { 1587 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1588 unsigned int mcr; 1589 1590 dbg("%s - port %d", __FUNCTION__, port->number); 1591 1592 mcr = edge_port->shadowMCR; 1593 if (set & TIOCM_RTS) 1594 mcr |= MCR_RTS; 1595 if (set & TIOCM_DTR) 1596 mcr |= MCR_DTR; 1597 if (set & TIOCM_LOOP) 1598 mcr |= MCR_LOOPBACK; 1599 1600 if (clear & TIOCM_RTS) 1601 mcr &= ~MCR_RTS; 1602 if (clear & TIOCM_DTR) 1603 mcr &= ~MCR_DTR; 1604 if (clear & TIOCM_LOOP) 1605 mcr &= ~MCR_LOOPBACK; 1606 1607 edge_port->shadowMCR = mcr; 1608 1609 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1610 1611 return 0; 1612 } 1613 1614 static int edge_tiocmget(struct usb_serial_port *port, struct file *file) 1615 { 1616 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1617 unsigned int result = 0; 1618 unsigned int msr; 1619 unsigned int mcr; 1620 1621 dbg("%s - port %d", __FUNCTION__, port->number); 1622 1623 msr = edge_port->shadowMSR; 1624 mcr = edge_port->shadowMCR; 1625 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1626 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1627 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1628 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1629 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1630 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1631 1632 1633 dbg("%s -- %x", __FUNCTION__, result); 1634 1635 return result; 1636 } 1637 1638 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo) 1639 { 1640 struct serial_struct tmp; 1641 1642 if (!retinfo) 1643 return -EFAULT; 1644 1645 memset(&tmp, 0, sizeof(tmp)); 1646 1647 tmp.type = PORT_16550A; 1648 tmp.line = edge_port->port->serial->minor; 1649 tmp.port = edge_port->port->number; 1650 tmp.irq = 0; 1651 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1652 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1653 tmp.baud_base = 9600; 1654 tmp.close_delay = 5*HZ; 1655 tmp.closing_wait = 30*HZ; 1656 // tmp.custom_divisor = state->custom_divisor; 1657 // tmp.hub6 = state->hub6; 1658 // tmp.io_type = state->io_type; 1659 1660 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1661 return -EFAULT; 1662 return 0; 1663 } 1664 1665 1666 1667 /***************************************************************************** 1668 * SerialIoctl 1669 * this function handles any ioctl calls to the driver 1670 *****************************************************************************/ 1671 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 1672 { 1673 DEFINE_WAIT(wait); 1674 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1675 struct async_icount cnow; 1676 struct async_icount cprev; 1677 struct serial_icounter_struct icount; 1678 1679 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); 1680 1681 switch (cmd) { 1682 // return number of bytes available 1683 case TIOCINQ: 1684 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); 1685 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg); 1686 break; 1687 1688 case TIOCSERGETLSR: 1689 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); 1690 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1691 return 0; 1692 1693 case TIOCGSERIAL: 1694 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); 1695 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1696 1697 case TIOCSSERIAL: 1698 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); 1699 break; 1700 1701 case TIOCMIWAIT: 1702 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 1703 cprev = edge_port->icount; 1704 while (1) { 1705 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE); 1706 schedule(); 1707 finish_wait(&edge_port->delta_msr_wait, &wait); 1708 /* see if a signal did it */ 1709 if (signal_pending(current)) 1710 return -ERESTARTSYS; 1711 cnow = edge_port->icount; 1712 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1713 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1714 return -EIO; /* no change => error */ 1715 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1716 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1717 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1718 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 1719 return 0; 1720 } 1721 cprev = cnow; 1722 } 1723 /* NOTREACHED */ 1724 break; 1725 1726 case TIOCGICOUNT: 1727 cnow = edge_port->icount; 1728 memset(&icount, 0, sizeof(icount)); 1729 icount.cts = cnow.cts; 1730 icount.dsr = cnow.dsr; 1731 icount.rng = cnow.rng; 1732 icount.dcd = cnow.dcd; 1733 icount.rx = cnow.rx; 1734 icount.tx = cnow.tx; 1735 icount.frame = cnow.frame; 1736 icount.overrun = cnow.overrun; 1737 icount.parity = cnow.parity; 1738 icount.brk = cnow.brk; 1739 icount.buf_overrun = cnow.buf_overrun; 1740 1741 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx ); 1742 if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) 1743 return -EFAULT; 1744 return 0; 1745 } 1746 1747 return -ENOIOCTLCMD; 1748 } 1749 1750 1751 /***************************************************************************** 1752 * SerialBreak 1753 * this function sends a break to the port 1754 *****************************************************************************/ 1755 static void edge_break (struct usb_serial_port *port, int break_state) 1756 { 1757 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1758 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1759 int status; 1760 1761 if ((!edge_serial->is_epic) || 1762 ((edge_serial->is_epic) && 1763 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1764 /* flush and chase */ 1765 edge_port->chaseResponsePending = true; 1766 1767 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1768 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1769 if (status == 0) { 1770 // block until chase finished 1771 block_until_chase_response(edge_port); 1772 } else { 1773 edge_port->chaseResponsePending = false; 1774 } 1775 } 1776 1777 if ((!edge_serial->is_epic) || 1778 ((edge_serial->is_epic) && 1779 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1780 if (break_state == -1) { 1781 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__); 1782 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0); 1783 } else { 1784 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__); 1785 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0); 1786 } 1787 if (status) { 1788 dbg("%s - error sending break set/clear command.", __FUNCTION__); 1789 } 1790 } 1791 1792 return; 1793 } 1794 1795 1796 /***************************************************************************** 1797 * process_rcvd_data 1798 * this function handles the data received on the bulk in pipe. 1799 *****************************************************************************/ 1800 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength) 1801 { 1802 struct usb_serial_port *port; 1803 struct edgeport_port *edge_port; 1804 struct tty_struct *tty; 1805 __u16 lastBufferLength; 1806 __u16 rxLen; 1807 1808 dbg("%s", __FUNCTION__); 1809 1810 lastBufferLength = bufferLength + 1; 1811 1812 while (bufferLength > 0) { 1813 /* failsafe incase we get a message that we don't understand */ 1814 if (lastBufferLength == bufferLength) { 1815 dbg("%s - stuck in loop, exiting it.", __FUNCTION__); 1816 break; 1817 } 1818 lastBufferLength = bufferLength; 1819 1820 switch (edge_serial->rxState) { 1821 case EXPECT_HDR1: 1822 edge_serial->rxHeader1 = *buffer; 1823 ++buffer; 1824 --bufferLength; 1825 1826 if (bufferLength == 0) { 1827 edge_serial->rxState = EXPECT_HDR2; 1828 break; 1829 } 1830 /* otherwise, drop on through */ 1831 1832 case EXPECT_HDR2: 1833 edge_serial->rxHeader2 = *buffer; 1834 ++buffer; 1835 --bufferLength; 1836 1837 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2); 1838 1839 // Process depending on whether this header is 1840 // data or status 1841 1842 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1843 // Decode this status header and goto EXPECT_HDR1 (if we 1844 // can process the status with only 2 bytes), or goto 1845 // EXPECT_HDR3 to get the third byte. 1846 1847 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1848 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1); 1849 1850 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) { 1851 // This status needs additional bytes. Save what we have 1852 // and then wait for more data. 1853 edge_serial->rxStatusParam = edge_serial->rxHeader2; 1854 1855 edge_serial->rxState = EXPECT_HDR3; 1856 break; 1857 } 1858 1859 // We have all the header bytes, process the status now 1860 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0); 1861 edge_serial->rxState = EXPECT_HDR1; 1862 break; 1863 } else { 1864 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1865 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2); 1866 1867 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining); 1868 1869 //ASSERT( DevExt->RxPort < DevExt->NumPorts ); 1870 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH ); 1871 1872 if (bufferLength == 0 ) { 1873 edge_serial->rxState = EXPECT_DATA; 1874 break; 1875 } 1876 // Else, drop through 1877 } 1878 1879 case EXPECT_DATA: // Expect data 1880 1881 if (bufferLength < edge_serial->rxBytesRemaining) { 1882 rxLen = bufferLength; 1883 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer 1884 } else { 1885 // BufLen >= RxBytesRemaining 1886 rxLen = edge_serial->rxBytesRemaining; 1887 edge_serial->rxState = EXPECT_HDR1; // Start another header next time 1888 } 1889 1890 bufferLength -= rxLen; 1891 edge_serial->rxBytesRemaining -= rxLen; 1892 1893 /* spit this data back into the tty driver if this port is open */ 1894 if (rxLen) { 1895 port = edge_serial->serial->port[edge_serial->rxPort]; 1896 edge_port = usb_get_serial_port_data(port); 1897 if (edge_port->open) { 1898 tty = edge_port->port->tty; 1899 if (tty) { 1900 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort); 1901 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1902 } 1903 edge_port->icount.rx += rxLen; 1904 } 1905 buffer += rxLen; 1906 } 1907 1908 break; 1909 1910 case EXPECT_HDR3: // Expect 3rd byte of status header 1911 edge_serial->rxHeader3 = *buffer; 1912 ++buffer; 1913 --bufferLength; 1914 1915 // We have all the header bytes, process the status now 1916 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3); 1917 edge_serial->rxState = EXPECT_HDR1; 1918 break; 1919 1920 } 1921 } 1922 } 1923 1924 1925 /***************************************************************************** 1926 * process_rcvd_status 1927 * this function handles the any status messages received on the bulk in pipe. 1928 *****************************************************************************/ 1929 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3) 1930 { 1931 struct usb_serial_port *port; 1932 struct edgeport_port *edge_port; 1933 __u8 code = edge_serial->rxStatusCode; 1934 1935 /* switch the port pointer to the one being currently talked about */ 1936 port = edge_serial->serial->port[edge_serial->rxPort]; 1937 edge_port = usb_get_serial_port_data(port); 1938 if (edge_port == NULL) { 1939 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort); 1940 return; 1941 } 1942 1943 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort); 1944 1945 if (code == IOSP_EXT_STATUS) { 1946 switch (byte2) { 1947 case IOSP_EXT_STATUS_CHASE_RSP: 1948 // we want to do EXT status regardless of port open/closed 1949 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 ); 1950 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call 1951 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do. 1952 // Also, we currently clear flag and close the port regardless of content of above's Byte3. 1953 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport, 1954 // like wait longer in block_until_chase_response, but for now we don't. 1955 edge_port->chaseResponsePending = false; 1956 wake_up (&edge_port->wait_chase); 1957 return; 1958 1959 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1960 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 ); 1961 //Port->RxCheckRsp = true; 1962 return; 1963 } 1964 } 1965 1966 if (code == IOSP_STATUS_OPEN_RSP) { 1967 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1968 edge_port->maxTxCredits = edge_port->txCredits; 1969 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits); 1970 handle_new_msr (edge_port, byte2); 1971 1972 /* send the current line settings to the port so we are in sync with any further termios calls */ 1973 if (edge_port->port->tty) 1974 change_port_settings (edge_port, edge_port->port->tty->termios); 1975 1976 /* we have completed the open */ 1977 edge_port->openPending = false; 1978 edge_port->open = true; 1979 wake_up(&edge_port->wait_open); 1980 return; 1981 } 1982 1983 // If port is closed, silently discard all rcvd status. We can 1984 // have cases where buffered status is received AFTER the close 1985 // port command is sent to the Edgeport. 1986 if (!edge_port->open || edge_port->closePending) { 1987 return; 1988 } 1989 1990 switch (code) { 1991 // Not currently sent by Edgeport 1992 case IOSP_STATUS_LSR: 1993 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 1994 handle_new_lsr(edge_port, false, byte2, 0); 1995 break; 1996 1997 case IOSP_STATUS_LSR_DATA: 1998 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 1999 // byte2 is LSR Register 2000 // byte3 is broken data byte 2001 handle_new_lsr(edge_port, true, byte2, byte3); 2002 break; 2003 // 2004 // case IOSP_EXT_4_STATUS: 2005 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); 2006 // break; 2007 // 2008 case IOSP_STATUS_MSR: 2009 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); 2010 2011 // Process this new modem status and generate appropriate 2012 // events, etc, based on the new status. This routine 2013 // also saves the MSR in Port->ShadowMsr. 2014 handle_new_msr(edge_port, byte2); 2015 break; 2016 2017 default: 2018 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code); 2019 break; 2020 } 2021 2022 return; 2023 } 2024 2025 2026 /***************************************************************************** 2027 * edge_tty_recv 2028 * this function passes data on to the tty flip buffer 2029 *****************************************************************************/ 2030 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length) 2031 { 2032 int cnt; 2033 2034 do { 2035 cnt = tty_buffer_request_room(tty, length); 2036 if (cnt < length) { 2037 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2038 __FUNCTION__, length - cnt); 2039 if(cnt == 0) 2040 break; 2041 } 2042 tty_insert_flip_string(tty, data, cnt); 2043 data += cnt; 2044 length -= cnt; 2045 } while (length > 0); 2046 2047 tty_flip_buffer_push(tty); 2048 } 2049 2050 2051 /***************************************************************************** 2052 * handle_new_msr 2053 * this function handles any change to the msr register for a port. 2054 *****************************************************************************/ 2055 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2056 { 2057 struct async_icount *icount; 2058 2059 dbg("%s %02x", __FUNCTION__, newMsr); 2060 2061 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2062 icount = &edge_port->icount; 2063 2064 /* update input line counters */ 2065 if (newMsr & EDGEPORT_MSR_DELTA_CTS) { 2066 icount->cts++; 2067 } 2068 if (newMsr & EDGEPORT_MSR_DELTA_DSR) { 2069 icount->dsr++; 2070 } 2071 if (newMsr & EDGEPORT_MSR_DELTA_CD) { 2072 icount->dcd++; 2073 } 2074 if (newMsr & EDGEPORT_MSR_DELTA_RI) { 2075 icount->rng++; 2076 } 2077 wake_up_interruptible(&edge_port->delta_msr_wait); 2078 } 2079 2080 /* Save the new modem status */ 2081 edge_port->shadowMSR = newMsr & 0xf0; 2082 2083 return; 2084 } 2085 2086 2087 /***************************************************************************** 2088 * handle_new_lsr 2089 * this function handles any change to the lsr register for a port. 2090 *****************************************************************************/ 2091 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data) 2092 { 2093 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2094 struct async_icount *icount; 2095 2096 dbg("%s - %02x", __FUNCTION__, newLsr); 2097 2098 edge_port->shadowLSR = lsr; 2099 2100 if (newLsr & LSR_BREAK) { 2101 // 2102 // Parity and Framing errors only count if they 2103 // occur exclusive of a break being 2104 // received. 2105 // 2106 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2107 } 2108 2109 /* Place LSR data byte into Rx buffer */ 2110 if (lsrData && edge_port->port->tty) 2111 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1); 2112 2113 /* update input line counters */ 2114 icount = &edge_port->icount; 2115 if (newLsr & LSR_BREAK) { 2116 icount->brk++; 2117 } 2118 if (newLsr & LSR_OVER_ERR) { 2119 icount->overrun++; 2120 } 2121 if (newLsr & LSR_PAR_ERR) { 2122 icount->parity++; 2123 } 2124 if (newLsr & LSR_FRM_ERR) { 2125 icount->frame++; 2126 } 2127 2128 return; 2129 } 2130 2131 2132 /**************************************************************************** 2133 * sram_write 2134 * writes a number of bytes to the Edgeport device's sram starting at the 2135 * given address. 2136 * If successful returns the number of bytes written, otherwise it returns 2137 * a negative error number of the problem. 2138 ****************************************************************************/ 2139 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2140 { 2141 int result; 2142 __u16 current_length; 2143 unsigned char *transfer_buffer; 2144 2145 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2146 2147 transfer_buffer = kmalloc (64, GFP_KERNEL); 2148 if (!transfer_buffer) { 2149 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2150 return -ENOMEM; 2151 } 2152 2153 /* need to split these writes up into 64 byte chunks */ 2154 result = 0; 2155 while (length > 0) { 2156 if (length > 64) { 2157 current_length = 64; 2158 } else { 2159 current_length = length; 2160 } 2161 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2162 memcpy (transfer_buffer, data, current_length); 2163 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM, 2164 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2165 if (result < 0) 2166 break; 2167 length -= current_length; 2168 addr += current_length; 2169 data += current_length; 2170 } 2171 2172 kfree (transfer_buffer); 2173 return result; 2174 } 2175 2176 2177 /**************************************************************************** 2178 * rom_write 2179 * writes a number of bytes to the Edgeport device's ROM starting at the 2180 * given address. 2181 * If successful returns the number of bytes written, otherwise it returns 2182 * a negative error number of the problem. 2183 ****************************************************************************/ 2184 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2185 { 2186 int result; 2187 __u16 current_length; 2188 unsigned char *transfer_buffer; 2189 2190 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2191 2192 transfer_buffer = kmalloc (64, GFP_KERNEL); 2193 if (!transfer_buffer) { 2194 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2195 return -ENOMEM; 2196 } 2197 2198 /* need to split these writes up into 64 byte chunks */ 2199 result = 0; 2200 while (length > 0) { 2201 if (length > 64) { 2202 current_length = 64; 2203 } else { 2204 current_length = length; 2205 } 2206 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2207 memcpy (transfer_buffer, data, current_length); 2208 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM, 2209 0x40, addr, extAddr, transfer_buffer, current_length, 300); 2210 if (result < 0) 2211 break; 2212 length -= current_length; 2213 addr += current_length; 2214 data += current_length; 2215 } 2216 2217 kfree (transfer_buffer); 2218 return result; 2219 } 2220 2221 2222 /**************************************************************************** 2223 * rom_read 2224 * reads a number of bytes from the Edgeport device starting at the given 2225 * address. 2226 * If successful returns the number of bytes read, otherwise it returns 2227 * a negative error number of the problem. 2228 ****************************************************************************/ 2229 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) 2230 { 2231 int result; 2232 __u16 current_length; 2233 unsigned char *transfer_buffer; 2234 2235 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); 2236 2237 transfer_buffer = kmalloc (64, GFP_KERNEL); 2238 if (!transfer_buffer) { 2239 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); 2240 return -ENOMEM; 2241 } 2242 2243 /* need to split these reads up into 64 byte chunks */ 2244 result = 0; 2245 while (length > 0) { 2246 if (length > 64) { 2247 current_length = 64; 2248 } else { 2249 current_length = length; 2250 } 2251 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); 2252 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM, 2253 0xC0, addr, extAddr, transfer_buffer, current_length, 300); 2254 if (result < 0) 2255 break; 2256 memcpy (data, transfer_buffer, current_length); 2257 length -= current_length; 2258 addr += current_length; 2259 data += current_length; 2260 } 2261 2262 kfree (transfer_buffer); 2263 return result; 2264 } 2265 2266 2267 /**************************************************************************** 2268 * send_iosp_ext_cmd 2269 * Is used to send a IOSP message to the Edgeport device 2270 ****************************************************************************/ 2271 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param) 2272 { 2273 unsigned char *buffer; 2274 unsigned char *currentCommand; 2275 int length = 0; 2276 int status = 0; 2277 2278 dbg("%s - %d, %d", __FUNCTION__, command, param); 2279 2280 buffer = kmalloc (10, GFP_ATOMIC); 2281 if (!buffer) { 2282 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10); 2283 return -ENOMEM; 2284 } 2285 2286 currentCommand = buffer; 2287 2288 MAKE_CMD_EXT_CMD (¤tCommand, &length, 2289 edge_port->port->number - edge_port->port->serial->minor, 2290 command, param); 2291 2292 status = write_cmd_usb (edge_port, buffer, length); 2293 if (status) { 2294 /* something bad happened, let's free up the memory */ 2295 kfree(buffer); 2296 } 2297 2298 return status; 2299 } 2300 2301 2302 /***************************************************************************** 2303 * write_cmd_usb 2304 * this function writes the given buffer out to the bulk write endpoint. 2305 *****************************************************************************/ 2306 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length) 2307 { 2308 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2309 int status = 0; 2310 struct urb *urb; 2311 int timeout; 2312 2313 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer); 2314 2315 /* Allocate our next urb */ 2316 urb = usb_alloc_urb (0, GFP_ATOMIC); 2317 if (!urb) 2318 return -ENOMEM; 2319 2320 atomic_inc(&CmdUrbs); 2321 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs)); 2322 2323 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 2324 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 2325 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2326 2327 edge_port->commandPending = true; 2328 status = usb_submit_urb(urb, GFP_ATOMIC); 2329 2330 if (status) { 2331 /* something went wrong */ 2332 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status); 2333 usb_kill_urb(urb); 2334 usb_free_urb(urb); 2335 atomic_dec(&CmdUrbs); 2336 return status; 2337 } 2338 2339 // wait for command to finish 2340 timeout = COMMAND_TIMEOUT; 2341 #if 0 2342 wait_event (&edge_port->wait_command, !edge_port->commandPending); 2343 2344 if (edge_port->commandPending) { 2345 /* command timed out */ 2346 dbg("%s - command timed out", __FUNCTION__); 2347 status = -EINVAL; 2348 } 2349 #endif 2350 return status; 2351 } 2352 2353 2354 /***************************************************************************** 2355 * send_cmd_write_baud_rate 2356 * this function sends the proper command to change the baud rate of the 2357 * specified port. 2358 *****************************************************************************/ 2359 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate) 2360 { 2361 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2362 unsigned char *cmdBuffer; 2363 unsigned char *currCmd; 2364 int cmdLen = 0; 2365 int divisor; 2366 int status; 2367 unsigned char number = edge_port->port->number - edge_port->port->serial->minor; 2368 2369 if (edge_serial->is_epic && 2370 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2371 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2372 edge_port->port->number, baudRate); 2373 return 0; 2374 } 2375 2376 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); 2377 2378 status = calc_baud_rate_divisor (baudRate, &divisor); 2379 if (status) { 2380 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__); 2381 return status; 2382 } 2383 2384 // Alloc memory for the string of commands. 2385 cmdBuffer = kmalloc (0x100, GFP_ATOMIC); 2386 if (!cmdBuffer) { 2387 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); 2388 return -ENOMEM; 2389 } 2390 currCmd = cmdBuffer; 2391 2392 // Enable access to divisor latch 2393 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); 2394 2395 // Write the divisor itself 2396 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); 2397 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); 2398 2399 // Restore original value to disable access to divisor latch 2400 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); 2401 2402 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); 2403 if (status) { 2404 /* something bad happened, let's free up the memory */ 2405 kfree (cmdBuffer); 2406 } 2407 2408 return status; 2409 } 2410 2411 2412 /***************************************************************************** 2413 * calc_baud_rate_divisor 2414 * this function calculates the proper baud rate divisor for the specified 2415 * baud rate. 2416 *****************************************************************************/ 2417 static int calc_baud_rate_divisor (int baudrate, int *divisor) 2418 { 2419 int i; 2420 __u16 custom; 2421 2422 2423 dbg("%s - %d", __FUNCTION__, baudrate); 2424 2425 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2426 if ( divisor_table[i].BaudRate == baudrate ) { 2427 *divisor = divisor_table[i].Divisor; 2428 return 0; 2429 } 2430 } 2431 2432 // We have tried all of the standard baud rates 2433 // lets try to calculate the divisor for this baud rate 2434 // Make sure the baud rate is reasonable 2435 if (baudrate > 50 && baudrate < 230400) { 2436 // get divisor 2437 custom = (__u16)((230400L + baudrate/2) / baudrate); 2438 2439 *divisor = custom; 2440 2441 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); 2442 return 0; 2443 } 2444 2445 return -1; 2446 } 2447 2448 2449 /***************************************************************************** 2450 * send_cmd_write_uart_register 2451 * this function builds up a uart register message and sends to to the device. 2452 *****************************************************************************/ 2453 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) 2454 { 2455 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2456 unsigned char *cmdBuffer; 2457 unsigned char *currCmd; 2458 unsigned long cmdLen = 0; 2459 int status; 2460 2461 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); 2462 2463 if (edge_serial->is_epic && 2464 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2465 regNum == MCR) { 2466 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2467 return 0; 2468 } 2469 2470 if (edge_serial->is_epic && 2471 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2472 regNum == LCR) { 2473 dbg ("SendCmdWriteUartReg - Not writing to LCR Register"); 2474 return 0; 2475 } 2476 2477 // Alloc memory for the string of commands. 2478 cmdBuffer = kmalloc (0x10, GFP_ATOMIC); 2479 if (cmdBuffer == NULL ) { 2480 return -ENOMEM; 2481 } 2482 2483 currCmd = cmdBuffer; 2484 2485 // Build a cmd in the buffer to write the given register 2486 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, 2487 edge_port->port->number - edge_port->port->serial->minor, 2488 regNum, regValue); 2489 2490 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2491 if (status) { 2492 /* something bad happened, let's free up the memory */ 2493 kfree (cmdBuffer); 2494 } 2495 2496 return status; 2497 } 2498 2499 2500 /***************************************************************************** 2501 * change_port_settings 2502 * This routine is called to set the UART on the device to match the specified 2503 * new settings. 2504 *****************************************************************************/ 2505 #ifndef CMSPAR 2506 #define CMSPAR 0 2507 #endif 2508 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios) 2509 { 2510 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2511 struct tty_struct *tty; 2512 int baud; 2513 unsigned cflag; 2514 __u8 mask = 0xff; 2515 __u8 lData; 2516 __u8 lParity; 2517 __u8 lStop; 2518 __u8 rxFlow; 2519 __u8 txFlow; 2520 int status; 2521 2522 dbg("%s - port %d", __FUNCTION__, edge_port->port->number); 2523 2524 if (!edge_port->open && 2525 !edge_port->openPending) { 2526 dbg("%s - port not opened", __FUNCTION__); 2527 return; 2528 } 2529 2530 tty = edge_port->port->tty; 2531 if ((!tty) || 2532 (!tty->termios)) { 2533 dbg("%s - no tty structures", __FUNCTION__); 2534 return; 2535 } 2536 2537 cflag = tty->termios->c_cflag; 2538 2539 switch (cflag & CSIZE) { 2540 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; 2541 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; 2542 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; 2543 default: 2544 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; 2545 } 2546 2547 lParity = LCR_PAR_NONE; 2548 if (cflag & PARENB) { 2549 if (cflag & CMSPAR) { 2550 if (cflag & PARODD) { 2551 lParity = LCR_PAR_MARK; 2552 dbg("%s - parity = mark", __FUNCTION__); 2553 } else { 2554 lParity = LCR_PAR_SPACE; 2555 dbg("%s - parity = space", __FUNCTION__); 2556 } 2557 } else if (cflag & PARODD) { 2558 lParity = LCR_PAR_ODD; 2559 dbg("%s - parity = odd", __FUNCTION__); 2560 } else { 2561 lParity = LCR_PAR_EVEN; 2562 dbg("%s - parity = even", __FUNCTION__); 2563 } 2564 } else { 2565 dbg("%s - parity = none", __FUNCTION__); 2566 } 2567 2568 if (cflag & CSTOPB) { 2569 lStop = LCR_STOP_2; 2570 dbg("%s - stop bits = 2", __FUNCTION__); 2571 } else { 2572 lStop = LCR_STOP_1; 2573 dbg("%s - stop bits = 1", __FUNCTION__); 2574 } 2575 2576 /* figure out the flow control settings */ 2577 rxFlow = txFlow = 0x00; 2578 if (cflag & CRTSCTS) { 2579 rxFlow |= IOSP_RX_FLOW_RTS; 2580 txFlow |= IOSP_TX_FLOW_CTS; 2581 dbg("%s - RTS/CTS is enabled", __FUNCTION__); 2582 } else { 2583 dbg("%s - RTS/CTS is disabled", __FUNCTION__); 2584 } 2585 2586 /* if we are implementing XON/XOFF, set the start and stop character in the device */ 2587 if (I_IXOFF(tty) || I_IXON(tty)) { 2588 unsigned char stop_char = STOP_CHAR(tty); 2589 unsigned char start_char = START_CHAR(tty); 2590 2591 if ((!edge_serial->is_epic) || 2592 ((edge_serial->is_epic) && 2593 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2594 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char); 2595 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); 2596 } 2597 2598 /* if we are implementing INBOUND XON/XOFF */ 2599 if (I_IXOFF(tty)) { 2600 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2601 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2602 } else { 2603 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); 2604 } 2605 2606 /* if we are implementing OUTBOUND XON/XOFF */ 2607 if (I_IXON(tty)) { 2608 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2609 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2610 } else { 2611 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); 2612 } 2613 } 2614 2615 /* Set flow control to the configured value */ 2616 if ((!edge_serial->is_epic) || 2617 ((edge_serial->is_epic) && 2618 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2619 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2620 if ((!edge_serial->is_epic) || 2621 ((edge_serial->is_epic) && 2622 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2623 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2624 2625 2626 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2627 edge_port->shadowLCR |= (lData | lParity | lStop); 2628 2629 edge_port->validDataMask = mask; 2630 2631 /* Send the updated LCR value to the EdgePort */ 2632 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); 2633 if (status != 0) { 2634 return; 2635 } 2636 2637 /* set up the MCR register and send it to the EdgePort */ 2638 edge_port->shadowMCR = MCR_MASTER_IE; 2639 if (cflag & CBAUD) { 2640 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2641 } 2642 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 2643 if (status != 0) { 2644 return; 2645 } 2646 2647 /* Determine divisor based on baud rate */ 2648 baud = tty_get_baud_rate(tty); 2649 if (!baud) { 2650 /* pick a default, any default... */ 2651 baud = 9600; 2652 } 2653 2654 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2655 status = send_cmd_write_baud_rate (edge_port, baud); 2656 2657 return; 2658 } 2659 2660 2661 /**************************************************************************** 2662 * unicode_to_ascii 2663 * Turns a string from Unicode into ASCII. 2664 * Doesn't do a good job with any characters that are outside the normal 2665 * ASCII range, but it's only for debugging... 2666 * NOTE: expects the unicode in LE format 2667 ****************************************************************************/ 2668 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size) 2669 { 2670 int i; 2671 2672 if (buflen <= 0) /* never happens, but... */ 2673 return; 2674 --buflen; /* space for nul */ 2675 2676 for (i = 0; i < unicode_size; i++) { 2677 if (i >= buflen) 2678 break; 2679 string[i] = (char)(le16_to_cpu(unicode[i])); 2680 } 2681 string[i] = 0x00; 2682 } 2683 2684 2685 /**************************************************************************** 2686 * get_manufacturing_desc 2687 * reads in the manufacturing descriptor and stores it into the serial 2688 * structure. 2689 ****************************************************************************/ 2690 static void get_manufacturing_desc (struct edgeport_serial *edge_serial) 2691 { 2692 int response; 2693 2694 dbg("getting manufacturer descriptor"); 2695 2696 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2697 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, 2698 (__u8 *)(&edge_serial->manuf_descriptor)); 2699 2700 if (response < 1) { 2701 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n"); 2702 } else { 2703 char string[30]; 2704 dbg("**Manufacturer Descriptor"); 2705 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); 2706 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); 2707 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); 2708 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); 2709 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); 2710 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); 2711 unicode_to_ascii(string, sizeof(string), 2712 edge_serial->manuf_descriptor.SerialNumber, 2713 edge_serial->manuf_descriptor.SerNumLength/2); 2714 dbg(" SerialNumber: %s", string); 2715 unicode_to_ascii(string, sizeof(string), 2716 edge_serial->manuf_descriptor.AssemblyNumber, 2717 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2718 dbg(" AssemblyNumber: %s", string); 2719 unicode_to_ascii(string, sizeof(string), 2720 edge_serial->manuf_descriptor.OemAssyNumber, 2721 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2722 dbg(" OemAssyNumber: %s", string); 2723 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); 2724 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); 2725 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); 2726 } 2727 } 2728 2729 2730 /**************************************************************************** 2731 * get_boot_desc 2732 * reads in the bootloader descriptor and stores it into the serial 2733 * structure. 2734 ****************************************************************************/ 2735 static void get_boot_desc (struct edgeport_serial *edge_serial) 2736 { 2737 int response; 2738 2739 dbg("getting boot descriptor"); 2740 2741 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2742 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, 2743 (__u8 *)(&edge_serial->boot_descriptor)); 2744 2745 if (response < 1) { 2746 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n"); 2747 } else { 2748 dbg("**Boot Descriptor:"); 2749 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2750 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); 2751 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); 2752 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2753 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2754 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); 2755 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); 2756 } 2757 } 2758 2759 2760 /**************************************************************************** 2761 * load_application_firmware 2762 * This is called to load the application firmware to the device 2763 ****************************************************************************/ 2764 static void load_application_firmware (struct edgeport_serial *edge_serial) 2765 { 2766 struct edge_firmware_image_record *record; 2767 unsigned char *firmware; 2768 unsigned char *FirmwareImage; 2769 int ImageSize; 2770 int response; 2771 2772 2773 switch (edge_serial->product_info.iDownloadFile) { 2774 case EDGE_DOWNLOAD_FILE_I930: 2775 dbg("downloading firmware version (930) %d.%d.%d", 2776 OperationalCodeImageVersion_GEN1.MajorVersion, 2777 OperationalCodeImageVersion_GEN1.MinorVersion, 2778 OperationalCodeImageVersion_GEN1.BuildNumber); 2779 firmware = &OperationalCodeImage_GEN1[0]; 2780 FirmwareImage = &OperationalCodeImage_GEN1[0]; 2781 ImageSize = sizeof(OperationalCodeImage_GEN1); 2782 break; 2783 2784 case EDGE_DOWNLOAD_FILE_80251: 2785 dbg("downloading firmware version (80251) %d.%d.%d", 2786 OperationalCodeImageVersion_GEN2.MajorVersion, 2787 OperationalCodeImageVersion_GEN2.MinorVersion, 2788 OperationalCodeImageVersion_GEN2.BuildNumber); 2789 firmware = &OperationalCodeImage_GEN2[0]; 2790 FirmwareImage = &OperationalCodeImage_GEN2[0]; 2791 ImageSize = sizeof(OperationalCodeImage_GEN2); 2792 break; 2793 2794 case EDGE_DOWNLOAD_FILE_NONE: 2795 dbg ("No download file specified, skipping download\n"); 2796 return; 2797 2798 default: 2799 return; 2800 } 2801 2802 2803 for (;;) { 2804 record = (struct edge_firmware_image_record *)firmware; 2805 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 2806 if (response < 0) { 2807 dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); 2808 break; 2809 } 2810 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 2811 if (firmware >= &FirmwareImage[ImageSize]) { 2812 break; 2813 } 2814 } 2815 2816 dbg("sending exec_dl_code"); 2817 response = usb_control_msg (edge_serial->serial->dev, 2818 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2819 USB_REQUEST_ION_EXEC_DL_CODE, 2820 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2821 2822 return; 2823 } 2824 2825 2826 /**************************************************************************** 2827 * edge_startup 2828 ****************************************************************************/ 2829 static int edge_startup (struct usb_serial *serial) 2830 { 2831 struct edgeport_serial *edge_serial; 2832 struct edgeport_port *edge_port; 2833 struct usb_device *dev; 2834 int i, j; 2835 int response; 2836 bool interrupt_in_found; 2837 bool bulk_in_found; 2838 bool bulk_out_found; 2839 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2840 EDGE_COMPATIBILITY_MASK1, 2841 EDGE_COMPATIBILITY_MASK2 }; 2842 2843 dev = serial->dev; 2844 2845 /* create our private serial structure */ 2846 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2847 if (edge_serial == NULL) { 2848 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2849 return -ENOMEM; 2850 } 2851 spin_lock_init(&edge_serial->es_lock); 2852 edge_serial->serial = serial; 2853 usb_set_serial_data(serial, edge_serial); 2854 2855 /* get the name for the device from the device */ 2856 i = get_string(dev, dev->descriptor.iManufacturer, 2857 &edge_serial->name[0], MAX_NAME_LEN+1); 2858 edge_serial->name[i++] = ' '; 2859 get_string(dev, dev->descriptor.iProduct, 2860 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2861 2862 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2863 2864 /* Read the epic descriptor */ 2865 if (get_epic_descriptor(edge_serial) <= 0) { 2866 /* memcpy descriptor to Supports structures */ 2867 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2868 sizeof(struct edge_compatibility_bits)); 2869 2870 /* get the manufacturing descriptor for this device */ 2871 get_manufacturing_desc (edge_serial); 2872 2873 /* get the boot descriptor */ 2874 get_boot_desc (edge_serial); 2875 2876 get_product_info(edge_serial); 2877 } 2878 2879 /* set the number of ports from the manufacturing description */ 2880 /* serial->num_ports = serial->product_info.NumPorts; */ 2881 if ((!edge_serial->is_epic) && 2882 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2883 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 2884 "vs. core thinking we have %d ports, email " 2885 "greg@kroah.com this information.\n", 2886 edge_serial->product_info.NumPorts, 2887 serial->num_ports); 2888 } 2889 2890 dbg("%s - time 1 %ld", __FUNCTION__, jiffies); 2891 2892 /* If not an EPiC device */ 2893 if (!edge_serial->is_epic) { 2894 /* now load the application firmware into this device */ 2895 load_application_firmware (edge_serial); 2896 2897 dbg("%s - time 2 %ld", __FUNCTION__, jiffies); 2898 2899 /* Check current Edgeport EEPROM and update if necessary */ 2900 update_edgeport_E2PROM (edge_serial); 2901 2902 dbg("%s - time 3 %ld", __FUNCTION__, jiffies); 2903 2904 /* set the configuration to use #1 */ 2905 // dbg("set_configuration 1"); 2906 // usb_set_configuration (dev, 1); 2907 } 2908 2909 /* we set up the pointers to the endpoints in the edge_open function, 2910 * as the structures aren't created yet. */ 2911 2912 /* set up our port private structures */ 2913 for (i = 0; i < serial->num_ports; ++i) { 2914 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); 2915 if (edge_port == NULL) { 2916 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2917 for (j = 0; j < i; ++j) { 2918 kfree (usb_get_serial_port_data(serial->port[j])); 2919 usb_set_serial_port_data(serial->port[j], NULL); 2920 } 2921 usb_set_serial_data(serial, NULL); 2922 kfree(edge_serial); 2923 return -ENOMEM; 2924 } 2925 memset (edge_port, 0, sizeof(struct edgeport_port)); 2926 spin_lock_init(&edge_port->ep_lock); 2927 edge_port->port = serial->port[i]; 2928 usb_set_serial_port_data(serial->port[i], edge_port); 2929 } 2930 2931 response = 0; 2932 2933 if (edge_serial->is_epic) { 2934 /* EPIC thing, set up our interrupt polling now and our read urb, so 2935 * that the device knows it really is connected. */ 2936 interrupt_in_found = bulk_in_found = bulk_out_found = false; 2937 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) { 2938 struct usb_endpoint_descriptor *endpoint; 2939 int buffer_size; 2940 2941 endpoint = &serial->interface->altsetting[0].endpoint[i].desc; 2942 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 2943 if (!interrupt_in_found && 2944 (usb_endpoint_is_int_in(endpoint))) { 2945 /* we found a interrupt in endpoint */ 2946 dbg("found interrupt in"); 2947 2948 /* not set up yet, so do it now */ 2949 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL); 2950 if (!edge_serial->interrupt_read_urb) { 2951 err("out of memory"); 2952 return -ENOMEM; 2953 } 2954 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2955 if (!edge_serial->interrupt_in_buffer) { 2956 err("out of memory"); 2957 usb_free_urb(edge_serial->interrupt_read_urb); 2958 return -ENOMEM; 2959 } 2960 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress; 2961 2962 /* set up our interrupt urb */ 2963 usb_fill_int_urb(edge_serial->interrupt_read_urb, 2964 dev, 2965 usb_rcvintpipe(dev, endpoint->bEndpointAddress), 2966 edge_serial->interrupt_in_buffer, 2967 buffer_size, 2968 edge_interrupt_callback, 2969 edge_serial, 2970 endpoint->bInterval); 2971 2972 interrupt_in_found = true; 2973 } 2974 2975 if (!bulk_in_found && 2976 (usb_endpoint_is_bulk_in(endpoint))) { 2977 /* we found a bulk in endpoint */ 2978 dbg("found bulk in"); 2979 2980 /* not set up yet, so do it now */ 2981 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL); 2982 if (!edge_serial->read_urb) { 2983 err("out of memory"); 2984 return -ENOMEM; 2985 } 2986 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2987 if (!edge_serial->bulk_in_buffer) { 2988 err ("out of memory"); 2989 usb_free_urb(edge_serial->read_urb); 2990 return -ENOMEM; 2991 } 2992 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress; 2993 2994 /* set up our bulk in urb */ 2995 usb_fill_bulk_urb(edge_serial->read_urb, dev, 2996 usb_rcvbulkpipe(dev, endpoint->bEndpointAddress), 2997 edge_serial->bulk_in_buffer, 2998 endpoint->wMaxPacketSize, 2999 edge_bulk_in_callback, 3000 edge_serial); 3001 bulk_in_found = true; 3002 } 3003 3004 if (!bulk_out_found && 3005 (usb_endpoint_is_bulk_out(endpoint))) { 3006 /* we found a bulk out endpoint */ 3007 dbg("found bulk out"); 3008 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress; 3009 bulk_out_found = true; 3010 } 3011 } 3012 3013 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3014 err ("Error - the proper endpoints were not found!"); 3015 return -ENODEV; 3016 } 3017 3018 /* start interrupt read for this edgeport this interrupt will 3019 * continue as long as the edgeport is connected */ 3020 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL); 3021 if (response) 3022 err("%s - Error %d submitting control urb", __FUNCTION__, response); 3023 } 3024 return response; 3025 } 3026 3027 3028 /**************************************************************************** 3029 * edge_shutdown 3030 * This function is called whenever the device is removed from the usb bus. 3031 ****************************************************************************/ 3032 static void edge_shutdown (struct usb_serial *serial) 3033 { 3034 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3035 int i; 3036 3037 dbg("%s", __FUNCTION__); 3038 3039 /* stop reads and writes on all ports */ 3040 for (i=0; i < serial->num_ports; ++i) { 3041 kfree (usb_get_serial_port_data(serial->port[i])); 3042 usb_set_serial_port_data(serial->port[i], NULL); 3043 } 3044 /* free up our endpoint stuff */ 3045 if (edge_serial->is_epic) { 3046 usb_kill_urb(edge_serial->interrupt_read_urb); 3047 usb_free_urb(edge_serial->interrupt_read_urb); 3048 kfree(edge_serial->interrupt_in_buffer); 3049 3050 usb_kill_urb(edge_serial->read_urb); 3051 usb_free_urb(edge_serial->read_urb); 3052 kfree(edge_serial->bulk_in_buffer); 3053 } 3054 3055 kfree(edge_serial); 3056 usb_set_serial_data(serial, NULL); 3057 } 3058 3059 3060 /**************************************************************************** 3061 * edgeport_init 3062 * This is called by the module subsystem, or on startup to initialize us 3063 ****************************************************************************/ 3064 static int __init edgeport_init(void) 3065 { 3066 int retval; 3067 3068 retval = usb_serial_register(&edgeport_2port_device); 3069 if (retval) 3070 goto failed_2port_device_register; 3071 retval = usb_serial_register(&edgeport_4port_device); 3072 if (retval) 3073 goto failed_4port_device_register; 3074 retval = usb_serial_register(&edgeport_8port_device); 3075 if (retval) 3076 goto failed_8port_device_register; 3077 retval = usb_serial_register(&epic_device); 3078 if (retval) 3079 goto failed_epic_device_register; 3080 retval = usb_register(&io_driver); 3081 if (retval) 3082 goto failed_usb_register; 3083 atomic_set(&CmdUrbs, 0); 3084 info(DRIVER_DESC " " DRIVER_VERSION); 3085 return 0; 3086 3087 failed_usb_register: 3088 usb_serial_deregister(&epic_device); 3089 failed_epic_device_register: 3090 usb_serial_deregister(&edgeport_8port_device); 3091 failed_8port_device_register: 3092 usb_serial_deregister(&edgeport_4port_device); 3093 failed_4port_device_register: 3094 usb_serial_deregister(&edgeport_2port_device); 3095 failed_2port_device_register: 3096 return retval; 3097 } 3098 3099 3100 /**************************************************************************** 3101 * edgeport_exit 3102 * Called when the driver is about to be unloaded. 3103 ****************************************************************************/ 3104 static void __exit edgeport_exit (void) 3105 { 3106 usb_deregister (&io_driver); 3107 usb_serial_deregister (&edgeport_2port_device); 3108 usb_serial_deregister (&edgeport_4port_device); 3109 usb_serial_deregister (&edgeport_8port_device); 3110 usb_serial_deregister (&epic_device); 3111 } 3112 3113 module_init(edgeport_init); 3114 module_exit(edgeport_exit); 3115 3116 /* Module information */ 3117 MODULE_AUTHOR( DRIVER_AUTHOR ); 3118 MODULE_DESCRIPTION( DRIVER_DESC ); 3119 MODULE_LICENSE("GPL"); 3120 3121 module_param(debug, bool, S_IRUGO | S_IWUSR); 3122 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3123 3124 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 3125 MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 3126