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 char 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 char open; 127 char openPending; 128 char commandPending; 129 char closePending; 130 char 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 int 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 int CmdUrbs = 0; /* 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; 602 603 dbg("%s", __FUNCTION__); 604 605 switch (urb->status) { 606 case 0: 607 /* success */ 608 break; 609 case -ECONNRESET: 610 case -ENOENT: 611 case -ESHUTDOWN: 612 /* this urb is terminated, clean up */ 613 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 614 return; 615 default: 616 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 617 goto exit; 618 } 619 620 // process this interrupt-read even if there are no ports open 621 if (length) { 622 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data); 623 624 if (length > 1) { 625 bytes_avail = data[0] | (data[1] << 8); 626 if (bytes_avail) { 627 spin_lock(&edge_serial->es_lock); 628 edge_serial->rxBytesAvail += bytes_avail; 629 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 630 631 if (edge_serial->rxBytesAvail > 0 && 632 !edge_serial->read_in_progress) { 633 dbg("%s - posting a read", __FUNCTION__); 634 edge_serial->read_in_progress = TRUE; 635 636 /* we have pending bytes on the bulk in pipe, send a request */ 637 edge_serial->read_urb->dev = edge_serial->serial->dev; 638 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 639 if (result) { 640 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result); 641 edge_serial->read_in_progress = FALSE; 642 } 643 } 644 spin_unlock(&edge_serial->es_lock); 645 } 646 } 647 /* grab the txcredits for the ports if available */ 648 position = 2; 649 portNumber = 0; 650 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { 651 txCredits = data[position] | (data[position+1] << 8); 652 if (txCredits) { 653 port = edge_serial->serial->port[portNumber]; 654 edge_port = usb_get_serial_port_data(port); 655 if (edge_port->open) { 656 spin_lock(&edge_port->ep_lock); 657 edge_port->txCredits += txCredits; 658 spin_unlock(&edge_port->ep_lock); 659 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); 660 661 /* tell the tty driver that something has changed */ 662 if (edge_port->port->tty) 663 tty_wakeup(edge_port->port->tty); 664 665 // Since we have more credit, check if more data can be sent 666 send_more_port_data(edge_serial, edge_port); 667 } 668 } 669 position += 2; 670 ++portNumber; 671 } 672 } 673 674 exit: 675 result = usb_submit_urb (urb, GFP_ATOMIC); 676 if (result) { 677 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result); 678 } 679 } 680 681 682 /***************************************************************************** 683 * edge_bulk_in_callback 684 * this is the callback function for when we have received data on the 685 * bulk in endpoint. 686 *****************************************************************************/ 687 static void edge_bulk_in_callback (struct urb *urb) 688 { 689 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; 690 unsigned char *data = urb->transfer_buffer; 691 int status; 692 __u16 raw_data_length; 693 694 dbg("%s", __FUNCTION__); 695 696 if (urb->status) { 697 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 698 edge_serial->read_in_progress = FALSE; 699 return; 700 } 701 702 if (urb->actual_length == 0) { 703 dbg("%s - read bulk callback with no data", __FUNCTION__); 704 edge_serial->read_in_progress = FALSE; 705 return; 706 } 707 708 raw_data_length = urb->actual_length; 709 710 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data); 711 712 spin_lock(&edge_serial->es_lock); 713 714 /* decrement our rxBytes available by the number that we just got */ 715 edge_serial->rxBytesAvail -= raw_data_length; 716 717 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); 718 719 process_rcvd_data (edge_serial, data, urb->actual_length); 720 721 /* check to see if there's any more data for us to read */ 722 if (edge_serial->rxBytesAvail > 0) { 723 dbg("%s - posting a read", __FUNCTION__); 724 edge_serial->read_urb->dev = edge_serial->serial->dev; 725 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 726 if (status) { 727 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status); 728 edge_serial->read_in_progress = FALSE; 729 } 730 } else { 731 edge_serial->read_in_progress = FALSE; 732 } 733 734 spin_unlock(&edge_serial->es_lock); 735 } 736 737 738 /***************************************************************************** 739 * edge_bulk_out_data_callback 740 * this is the callback function for when we have finished sending serial data 741 * on the bulk out endpoint. 742 *****************************************************************************/ 743 static void edge_bulk_out_data_callback (struct urb *urb) 744 { 745 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 746 struct tty_struct *tty; 747 748 dbg("%s", __FUNCTION__); 749 750 if (urb->status) { 751 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 752 } 753 754 tty = edge_port->port->tty; 755 756 if (tty && edge_port->open) { 757 /* let the tty driver wakeup if it has a special write_wakeup function */ 758 tty_wakeup(tty); 759 } 760 761 // Release the Write URB 762 edge_port->write_in_progress = FALSE; 763 764 // Check if more data needs to be sent 765 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port); 766 } 767 768 769 /***************************************************************************** 770 * BulkOutCmdCallback 771 * this is the callback function for when we have finished sending a command 772 * on the bulk out endpoint. 773 *****************************************************************************/ 774 static void edge_bulk_out_cmd_callback (struct urb *urb) 775 { 776 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; 777 struct tty_struct *tty; 778 int status = urb->status; 779 780 dbg("%s", __FUNCTION__); 781 782 CmdUrbs--; 783 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); 784 785 786 /* clean up the transfer buffer */ 787 kfree(urb->transfer_buffer); 788 789 /* Free the command urb */ 790 usb_free_urb (urb); 791 792 if (status) { 793 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); 794 return; 795 } 796 797 /* Get pointer to tty */ 798 tty = edge_port->port->tty; 799 800 /* tell the tty driver that something has changed */ 801 if (tty && edge_port->open) 802 tty_wakeup(tty); 803 804 /* we have completed the command */ 805 edge_port->commandPending = FALSE; 806 wake_up(&edge_port->wait_command); 807 } 808 809 810 /***************************************************************************** 811 * Driver tty interface functions 812 *****************************************************************************/ 813 814 /***************************************************************************** 815 * SerialOpen 816 * this function is called by the tty driver when a port is opened 817 * If successful, we return 0 818 * Otherwise we return a negative error number. 819 *****************************************************************************/ 820 static int edge_open (struct usb_serial_port *port, struct file * filp) 821 { 822 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 823 struct usb_serial *serial; 824 struct edgeport_serial *edge_serial; 825 int response; 826 827 dbg("%s - port %d", __FUNCTION__, port->number); 828 829 if (edge_port == NULL) 830 return -ENODEV; 831 832 if (port->tty) 833 port->tty->low_latency = low_latency; 834 835 /* see if we've set up our endpoint info yet (can't set it up in edge_startup 836 as the structures were not set up at that time.) */ 837 serial = port->serial; 838 edge_serial = usb_get_serial_data(serial); 839 if (edge_serial == NULL) { 840 return -ENODEV; 841 } 842 if (edge_serial->interrupt_in_buffer == NULL) { 843 struct usb_serial_port *port0 = serial->port[0]; 844 845 /* not set up yet, so do it now */ 846 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; 847 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; 848 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 849 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 850 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; 851 edge_serial->read_urb = port0->read_urb; 852 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; 853 854 /* set up our interrupt urb */ 855 usb_fill_int_urb(edge_serial->interrupt_read_urb, 856 serial->dev, 857 usb_rcvintpipe(serial->dev, 858 port0->interrupt_in_endpointAddress), 859 port0->interrupt_in_buffer, 860 edge_serial->interrupt_read_urb->transfer_buffer_length, 861 edge_interrupt_callback, edge_serial, 862 edge_serial->interrupt_read_urb->interval); 863 864 /* set up our bulk in urb */ 865 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 866 usb_rcvbulkpipe(serial->dev, 867 port0->bulk_in_endpointAddress), 868 port0->bulk_in_buffer, 869 edge_serial->read_urb->transfer_buffer_length, 870 edge_bulk_in_callback, edge_serial); 871 edge_serial->read_in_progress = FALSE; 872 873 /* start interrupt read for this edgeport 874 * this interrupt will continue as long as the edgeport is connected */ 875 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL); 876 if (response) { 877 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response); 878 } 879 } 880 881 /* initialize our wait queues */ 882 init_waitqueue_head(&edge_port->wait_open); 883 init_waitqueue_head(&edge_port->wait_chase); 884 init_waitqueue_head(&edge_port->delta_msr_wait); 885 init_waitqueue_head(&edge_port->wait_command); 886 887 /* initialize our icount structure */ 888 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 889 890 /* initialize our port settings */ 891 edge_port->txCredits = 0; /* Can't send any data yet */ 892 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ 893 edge_port->chaseResponsePending = FALSE; 894 895 /* send a open port command */ 896 edge_port->openPending = TRUE; 897 edge_port->open = FALSE; 898 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); 899 900 if (response < 0) { 901 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__); 902 edge_port->openPending = FALSE; 903 return -ENODEV; 904 } 905 906 /* now wait for the port to be completely opened */ 907 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT); 908 909 if (edge_port->open == FALSE) { 910 /* open timed out */ 911 dbg("%s - open timedout", __FUNCTION__); 912 edge_port->openPending = FALSE; 913 return -ENODEV; 914 } 915 916 /* create the txfifo */ 917 edge_port->txfifo.head = 0; 918 edge_port->txfifo.tail = 0; 919 edge_port->txfifo.count = 0; 920 edge_port->txfifo.size = edge_port->maxTxCredits; 921 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL); 922 923 if (!edge_port->txfifo.fifo) { 924 dbg("%s - no memory", __FUNCTION__); 925 edge_close (port, filp); 926 return -ENOMEM; 927 } 928 929 /* Allocate a URB for the write */ 930 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL); 931 edge_port->write_in_progress = FALSE; 932 933 if (!edge_port->write_urb) { 934 dbg("%s - no memory", __FUNCTION__); 935 edge_close (port, filp); 936 return -ENOMEM; 937 } 938 939 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); 940 941 dbg("%s exited", __FUNCTION__); 942 943 return 0; 944 } 945 946 947 /************************************************************************ 948 * 949 * block_until_chase_response 950 * 951 * This function will block the close until one of the following: 952 * 1. Response to our Chase comes from Edgeport 953 * 2. A timout of 10 seconds without activity has expired 954 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 955 * 956 ************************************************************************/ 957 static void block_until_chase_response(struct edgeport_port *edge_port) 958 { 959 DEFINE_WAIT(wait); 960 __u16 lastCredits; 961 int timeout = 1*HZ; 962 int loop = 10; 963 964 while (1) { 965 // Save Last credits 966 lastCredits = edge_port->txCredits; 967 968 // Did we get our Chase response 969 if (edge_port->chaseResponsePending == FALSE) { 970 dbg("%s - Got Chase Response", __FUNCTION__); 971 972 // did we get all of our credit back? 973 if (edge_port->txCredits == edge_port->maxTxCredits ) { 974 dbg("%s - Got all credits", __FUNCTION__); 975 return; 976 } 977 } 978 979 // Block the thread for a while 980 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 981 schedule_timeout(timeout); 982 finish_wait(&edge_port->wait_chase, &wait); 983 984 if (lastCredits == edge_port->txCredits) { 985 // No activity.. count down. 986 loop--; 987 if (loop == 0) { 988 edge_port->chaseResponsePending = FALSE; 989 dbg("%s - Chase TIMEOUT", __FUNCTION__); 990 return; 991 } 992 } else { 993 // Reset timout value back to 10 seconds 994 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); 995 loop = 10; 996 } 997 } 998 } 999 1000 1001 /************************************************************************ 1002 * 1003 * block_until_tx_empty 1004 * 1005 * This function will block the close until one of the following: 1006 * 1. TX count are 0 1007 * 2. The edgeport has stopped 1008 * 3. A timout of 3 seconds without activity has expired 1009 * 1010 ************************************************************************/ 1011 static void block_until_tx_empty (struct edgeport_port *edge_port) 1012 { 1013 DEFINE_WAIT(wait); 1014 struct TxFifo *fifo = &edge_port->txfifo; 1015 __u32 lastCount; 1016 int timeout = HZ/10; 1017 int loop = 30; 1018 1019 while (1) { 1020 // Save Last count 1021 lastCount = fifo->count; 1022 1023 // Is the Edgeport Buffer empty? 1024 if (lastCount == 0) { 1025 dbg("%s - TX Buffer Empty", __FUNCTION__); 1026 return; 1027 } 1028 1029 // Block the thread for a while 1030 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); 1031 schedule_timeout(timeout); 1032 finish_wait(&edge_port->wait_chase, &wait); 1033 1034 dbg("%s wait", __FUNCTION__); 1035 1036 if (lastCount == fifo->count) { 1037 // No activity.. count down. 1038 loop--; 1039 if (loop == 0) { 1040 dbg("%s - TIMEOUT", __FUNCTION__); 1041 return; 1042 } 1043 } else { 1044 // Reset timout value back to seconds 1045 loop = 30; 1046 } 1047 } 1048 } 1049 1050 1051 /***************************************************************************** 1052 * edge_close 1053 * this function is called by the tty driver when a port is closed 1054 *****************************************************************************/ 1055 static void edge_close (struct usb_serial_port *port, struct file * filp) 1056 { 1057 struct edgeport_serial *edge_serial; 1058 struct edgeport_port *edge_port; 1059 int status; 1060 1061 dbg("%s - port %d", __FUNCTION__, port->number); 1062 1063 edge_serial = usb_get_serial_data(port->serial); 1064 edge_port = usb_get_serial_port_data(port); 1065 if ((edge_serial == NULL) || (edge_port == NULL)) 1066 return; 1067 1068 // block until tx is empty 1069 block_until_tx_empty(edge_port); 1070 1071 edge_port->closePending = TRUE; 1072 1073 if ((!edge_serial->is_epic) || 1074 ((edge_serial->is_epic) && 1075 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1076 /* flush and chase */ 1077 edge_port->chaseResponsePending = TRUE; 1078 1079 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); 1080 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); 1081 if (status == 0) { 1082 // block until chase finished 1083 block_until_chase_response(edge_port); 1084 } else { 1085 edge_port->chaseResponsePending = FALSE; 1086 } 1087 } 1088 1089 if ((!edge_serial->is_epic) || 1090 ((edge_serial->is_epic) && 1091 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1092 /* close the port */ 1093 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); 1094 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); 1095 } 1096 1097 //port->close = TRUE; 1098 edge_port->closePending = FALSE; 1099 edge_port->open = FALSE; 1100 edge_port->openPending = FALSE; 1101 1102 usb_kill_urb(edge_port->write_urb); 1103 1104 if (edge_port->write_urb) { 1105 /* if this urb had a transfer buffer already (old transfer) free it */ 1106 kfree(edge_port->write_urb->transfer_buffer); 1107 usb_free_urb(edge_port->write_urb); 1108 edge_port->write_urb = NULL; 1109 } 1110 kfree(edge_port->txfifo.fifo); 1111 edge_port->txfifo.fifo = NULL; 1112 1113 dbg("%s exited", __FUNCTION__); 1114 } 1115 1116 /***************************************************************************** 1117 * SerialWrite 1118 * this function is called by the tty driver when data should be written to 1119 * the port. 1120 * If successful, we return the number of bytes written, otherwise we return 1121 * a negative error number. 1122 *****************************************************************************/ 1123 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count) 1124 { 1125 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1126 struct TxFifo *fifo; 1127 int copySize; 1128 int bytesleft; 1129 int firsthalf; 1130 int secondhalf; 1131 unsigned long flags; 1132 1133 dbg("%s - port %d", __FUNCTION__, port->number); 1134 1135 if (edge_port == NULL) 1136 return -ENODEV; 1137 1138 // get a pointer to the Tx fifo 1139 fifo = &edge_port->txfifo; 1140 1141 spin_lock_irqsave(&edge_port->ep_lock, flags); 1142 1143 // calculate number of bytes to put in fifo 1144 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); 1145 1146 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, 1147 port->number, count, edge_port->txCredits - fifo->count, copySize); 1148 1149 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ 1150 if (copySize == 0) { 1151 dbg("%s - copySize = Zero", __FUNCTION__); 1152 goto finish_write; 1153 } 1154 1155 // queue the data 1156 // since we can never overflow the buffer we do not have to check for full condition 1157 1158 // the copy is done is two parts -- first fill to the end of the buffer 1159 // then copy the reset from the start of the buffer 1160 1161 bytesleft = fifo->size - fifo->head; 1162 firsthalf = min (bytesleft, copySize); 1163 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); 1164 1165 /* now copy our data */ 1166 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1167 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]); 1168 1169 // update the index and size 1170 fifo->head += firsthalf; 1171 fifo->count += firsthalf; 1172 1173 // wrap the index 1174 if (fifo->head == fifo->size) { 1175 fifo->head = 0; 1176 } 1177 1178 secondhalf = copySize-firsthalf; 1179 1180 if (secondhalf) { 1181 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); 1182 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1183 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]); 1184 // update the index and size 1185 fifo->count += secondhalf; 1186 fifo->head += secondhalf; 1187 // No need to check for wrap since we can not get to end of fifo in this part 1188 } 1189 1190 finish_write: 1191 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1192 1193 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port); 1194 1195 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); 1196 1197 return copySize; 1198 } 1199 1200 1201 /************************************************************************ 1202 * 1203 * send_more_port_data() 1204 * 1205 * This routine attempts to write additional UART transmit data 1206 * to a port over the USB bulk pipe. It is called (1) when new 1207 * data has been written to a port's TxBuffer from higher layers 1208 * (2) when the peripheral sends us additional TxCredits indicating 1209 * that it can accept more Tx data for a given port; and (3) when 1210 * a bulk write completes successfully and we want to see if we 1211 * can transmit more. 1212 * 1213 ************************************************************************/ 1214 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) 1215 { 1216 struct TxFifo *fifo = &edge_port->txfifo; 1217 struct urb *urb; 1218 unsigned char *buffer; 1219 int status; 1220 int count; 1221 int bytesleft; 1222 int firsthalf; 1223 int secondhalf; 1224 unsigned long flags; 1225 1226 dbg("%s(%d)", __FUNCTION__, edge_port->port->number); 1227 1228 spin_lock_irqsave(&edge_port->ep_lock, flags); 1229 1230 if (edge_port->write_in_progress || 1231 !edge_port->open || 1232 (fifo->count == 0)) { 1233 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); 1234 goto exit_send; 1235 } 1236 1237 // since the amount of data in the fifo will always fit into the 1238 // edgeport buffer we do not need to check the write length 1239 1240 // Do we have enough credits for this port to make it worthwhile 1241 // to bother queueing a write. If it's too small, say a few bytes, 1242 // it's better to wait for more credits so we can do a larger 1243 // write. 1244 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1245 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); 1246 goto exit_send; 1247 } 1248 1249 // lock this write 1250 edge_port->write_in_progress = TRUE; 1251 1252 // get a pointer to the write_urb 1253 urb = edge_port->write_urb; 1254 1255 /* make sure transfer buffer is freed */ 1256 kfree(urb->transfer_buffer); 1257 urb->transfer_buffer = NULL; 1258 1259 /* build the data header for the buffer and port that we are about to send out */ 1260 count = fifo->count; 1261 buffer = kmalloc (count+2, GFP_ATOMIC); 1262 if (buffer == NULL) { 1263 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__); 1264 edge_port->write_in_progress = FALSE; 1265 goto exit_send; 1266 } 1267 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); 1268 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); 1269 1270 /* now copy our data */ 1271 bytesleft = fifo->size - fifo->tail; 1272 firsthalf = min (bytesleft, count); 1273 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1274 fifo->tail += firsthalf; 1275 fifo->count -= firsthalf; 1276 if (fifo->tail == fifo->size) { 1277 fifo->tail = 0; 1278 } 1279 1280 secondhalf = count-firsthalf; 1281 if (secondhalf) { 1282 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); 1283 fifo->tail += secondhalf; 1284 fifo->count -= secondhalf; 1285 } 1286 1287 if (count) 1288 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]); 1289 1290 /* fill up the urb with all of our data and submit it */ 1291 usb_fill_bulk_urb (urb, edge_serial->serial->dev, 1292 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), 1293 buffer, count+2, edge_bulk_out_data_callback, edge_port); 1294 1295 /* decrement the number of credits we have by the number we just sent */ 1296 edge_port->txCredits -= count; 1297 edge_port->icount.tx += count; 1298 1299 urb->dev = edge_serial->serial->dev; 1300 status = usb_submit_urb(urb, GFP_ATOMIC); 1301 if (status) { 1302 /* something went wrong */ 1303 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status); 1304 edge_port->write_in_progress = FALSE; 1305 1306 /* revert the credits as something bad happened. */ 1307 edge_port->txCredits += count; 1308 edge_port->icount.tx -= count; 1309 } 1310 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); 1311 1312 exit_send: 1313 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1314 } 1315 1316 1317 /***************************************************************************** 1318 * edge_write_room 1319 * this function is called by the tty driver when it wants to know how many 1320 * bytes of data we can accept for a specific port. 1321 * If successful, we return the amount of room that we have for this port 1322 * (the txCredits), 1323 * Otherwise we return a negative error number. 1324 *****************************************************************************/ 1325 static int edge_write_room (struct usb_serial_port *port) 1326 { 1327 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1328 int room; 1329 unsigned long flags; 1330 1331 dbg("%s", __FUNCTION__); 1332 1333 if (edge_port == NULL) 1334 return -ENODEV; 1335 if (edge_port->closePending == TRUE) 1336 return -ENODEV; 1337 1338 dbg("%s - port %d", __FUNCTION__, port->number); 1339 1340 if (!edge_port->open) { 1341 dbg("%s - port not opened", __FUNCTION__); 1342 return -EINVAL; 1343 } 1344 1345 // total of both buffers is still txCredit 1346 spin_lock_irqsave(&edge_port->ep_lock, flags); 1347 room = edge_port->txCredits - edge_port->txfifo.count; 1348 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1349 1350 dbg("%s - returns %d", __FUNCTION__, room); 1351 return room; 1352 } 1353 1354 1355 /***************************************************************************** 1356 * edge_chars_in_buffer 1357 * this function is called by the tty driver when it wants to know how many 1358 * bytes of data we currently have outstanding in the port (data that has 1359 * been written, but hasn't made it out the port yet) 1360 * If successful, we return the number of bytes left to be written in the 1361 * system, 1362 * Otherwise we return a negative error number. 1363 *****************************************************************************/ 1364 static int edge_chars_in_buffer (struct usb_serial_port *port) 1365 { 1366 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1367 int num_chars; 1368 unsigned long flags; 1369 1370 dbg("%s", __FUNCTION__); 1371 1372 if (edge_port == NULL) 1373 return -ENODEV; 1374 if (edge_port->closePending == TRUE) 1375 return -ENODEV; 1376 1377 if (!edge_port->open) { 1378 dbg("%s - port not opened", __FUNCTION__); 1379 return -EINVAL; 1380 } 1381 1382 spin_lock_irqsave(&edge_port->ep_lock, flags); 1383 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; 1384 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1385 if (num_chars) { 1386 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); 1387 } 1388 1389 return num_chars; 1390 } 1391 1392 1393 /***************************************************************************** 1394 * SerialThrottle 1395 * this function is called by the tty driver when it wants to stop the data 1396 * being read from the port. 1397 *****************************************************************************/ 1398 static void edge_throttle (struct usb_serial_port *port) 1399 { 1400 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1401 struct tty_struct *tty; 1402 int status; 1403 1404 dbg("%s - port %d", __FUNCTION__, port->number); 1405 1406 if (edge_port == NULL) 1407 return; 1408 1409 if (!edge_port->open) { 1410 dbg("%s - port not opened", __FUNCTION__); 1411 return; 1412 } 1413 1414 tty = port->tty; 1415 if (!tty) { 1416 dbg ("%s - no tty available", __FUNCTION__); 1417 return; 1418 } 1419 1420 /* if we are implementing XON/XOFF, send the stop character */ 1421 if (I_IXOFF(tty)) { 1422 unsigned char stop_char = STOP_CHAR(tty); 1423 status = edge_write (port, &stop_char, 1); 1424 if (status <= 0) { 1425 return; 1426 } 1427 } 1428 1429 /* if we are implementing RTS/CTS, toggle that line */ 1430 if (tty->termios->c_cflag & CRTSCTS) { 1431 edge_port->shadowMCR &= ~MCR_RTS; 1432 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1433 if (status != 0) { 1434 return; 1435 } 1436 } 1437 1438 return; 1439 } 1440 1441 1442 /***************************************************************************** 1443 * edge_unthrottle 1444 * this function is called by the tty driver when it wants to resume the data 1445 * being read from the port (called after SerialThrottle is called) 1446 *****************************************************************************/ 1447 static void edge_unthrottle (struct usb_serial_port *port) 1448 { 1449 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1450 struct tty_struct *tty; 1451 int status; 1452 1453 dbg("%s - port %d", __FUNCTION__, port->number); 1454 1455 if (edge_port == NULL) 1456 return; 1457 1458 if (!edge_port->open) { 1459 dbg("%s - port not opened", __FUNCTION__); 1460 return; 1461 } 1462 1463 tty = port->tty; 1464 if (!tty) { 1465 dbg ("%s - no tty available", __FUNCTION__); 1466 return; 1467 } 1468 1469 /* if we are implementing XON/XOFF, send the start character */ 1470 if (I_IXOFF(tty)) { 1471 unsigned char start_char = START_CHAR(tty); 1472 status = edge_write (port, &start_char, 1); 1473 if (status <= 0) { 1474 return; 1475 } 1476 } 1477 1478 /* if we are implementing RTS/CTS, toggle that line */ 1479 if (tty->termios->c_cflag & CRTSCTS) { 1480 edge_port->shadowMCR |= MCR_RTS; 1481 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1482 if (status != 0) { 1483 return; 1484 } 1485 } 1486 1487 return; 1488 } 1489 1490 1491 /***************************************************************************** 1492 * SerialSetTermios 1493 * this function is called by the tty driver when it wants to change the termios structure 1494 *****************************************************************************/ 1495 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 1496 { 1497 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1498 struct tty_struct *tty = port->tty; 1499 unsigned int cflag; 1500 1501 if (!port->tty || !port->tty->termios) { 1502 dbg ("%s - no tty or termios", __FUNCTION__); 1503 return; 1504 } 1505 1506 cflag = tty->termios->c_cflag; 1507 /* check that they really want us to change something */ 1508 if (old_termios) { 1509 if (cflag == old_termios->c_cflag && 1510 tty->termios->c_iflag == old_termios->c_iflag) { 1511 dbg("%s - nothing to change", __FUNCTION__); 1512 return; 1513 } 1514 } 1515 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 CmdUrbs++; 2321 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, 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 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 == FALSE)); 2343 2344 if (edge_port->commandPending == TRUE) { 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->is_epic) && 2371 (!edge_serial->epic_descriptor.Supports.IOSPSetBaudRate))) { 2372 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2373 edge_port->port->number, baudRate); 2374 return 0; 2375 } 2376 2377 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); 2378 2379 status = calc_baud_rate_divisor (baudRate, &divisor); 2380 if (status) { 2381 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__); 2382 return status; 2383 } 2384 2385 // Alloc memory for the string of commands. 2386 cmdBuffer = kmalloc (0x100, GFP_ATOMIC); 2387 if (!cmdBuffer) { 2388 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); 2389 return -ENOMEM; 2390 } 2391 currCmd = cmdBuffer; 2392 2393 // Enable access to divisor latch 2394 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); 2395 2396 // Write the divisor itself 2397 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); 2398 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); 2399 2400 // Restore original value to disable access to divisor latch 2401 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); 2402 2403 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); 2404 if (status) { 2405 /* something bad happened, let's free up the memory */ 2406 kfree (cmdBuffer); 2407 } 2408 2409 return status; 2410 } 2411 2412 2413 /***************************************************************************** 2414 * calc_baud_rate_divisor 2415 * this function calculates the proper baud rate divisor for the specified 2416 * baud rate. 2417 *****************************************************************************/ 2418 static int calc_baud_rate_divisor (int baudrate, int *divisor) 2419 { 2420 int i; 2421 __u16 custom; 2422 2423 2424 dbg("%s - %d", __FUNCTION__, baudrate); 2425 2426 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2427 if ( divisor_table[i].BaudRate == baudrate ) { 2428 *divisor = divisor_table[i].Divisor; 2429 return 0; 2430 } 2431 } 2432 2433 // We have tried all of the standard baud rates 2434 // lets try to calculate the divisor for this baud rate 2435 // Make sure the baud rate is reasonable 2436 if (baudrate > 50 && baudrate < 230400) { 2437 // get divisor 2438 custom = (__u16)((230400L + baudrate/2) / baudrate); 2439 2440 *divisor = custom; 2441 2442 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); 2443 return 0; 2444 } 2445 2446 return -1; 2447 } 2448 2449 2450 /***************************************************************************** 2451 * send_cmd_write_uart_register 2452 * this function builds up a uart register message and sends to to the device. 2453 *****************************************************************************/ 2454 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) 2455 { 2456 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2457 unsigned char *cmdBuffer; 2458 unsigned char *currCmd; 2459 unsigned long cmdLen = 0; 2460 int status; 2461 2462 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); 2463 2464 if ((!edge_serial->is_epic) || 2465 ((edge_serial->is_epic) && 2466 (!edge_serial->epic_descriptor.Supports.IOSPWriteMCR) && 2467 (regNum == MCR))) { 2468 dbg("SendCmdWriteUartReg - Not writting to MCR Register"); 2469 return 0; 2470 } 2471 2472 if ((!edge_serial->is_epic) || 2473 ((edge_serial->is_epic) && 2474 (!edge_serial->epic_descriptor.Supports.IOSPWriteLCR) && 2475 (regNum == LCR))) { 2476 dbg ("SendCmdWriteUartReg - Not writting to LCR Register"); 2477 return 0; 2478 } 2479 2480 // Alloc memory for the string of commands. 2481 cmdBuffer = kmalloc (0x10, GFP_ATOMIC); 2482 if (cmdBuffer == NULL ) { 2483 return -ENOMEM; 2484 } 2485 2486 currCmd = cmdBuffer; 2487 2488 // Build a cmd in the buffer to write the given register 2489 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, 2490 edge_port->port->number - edge_port->port->serial->minor, 2491 regNum, regValue); 2492 2493 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2494 if (status) { 2495 /* something bad happened, let's free up the memory */ 2496 kfree (cmdBuffer); 2497 } 2498 2499 return status; 2500 } 2501 2502 2503 /***************************************************************************** 2504 * change_port_settings 2505 * This routine is called to set the UART on the device to match the specified 2506 * new settings. 2507 *****************************************************************************/ 2508 #ifndef CMSPAR 2509 #define CMSPAR 0 2510 #endif 2511 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios) 2512 { 2513 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); 2514 struct tty_struct *tty; 2515 int baud; 2516 unsigned cflag; 2517 __u8 mask = 0xff; 2518 __u8 lData; 2519 __u8 lParity; 2520 __u8 lStop; 2521 __u8 rxFlow; 2522 __u8 txFlow; 2523 int status; 2524 2525 dbg("%s - port %d", __FUNCTION__, edge_port->port->number); 2526 2527 if ((!edge_port->open) && 2528 (!edge_port->openPending)) { 2529 dbg("%s - port not opened", __FUNCTION__); 2530 return; 2531 } 2532 2533 tty = edge_port->port->tty; 2534 if ((!tty) || 2535 (!tty->termios)) { 2536 dbg("%s - no tty structures", __FUNCTION__); 2537 return; 2538 } 2539 2540 cflag = tty->termios->c_cflag; 2541 2542 switch (cflag & CSIZE) { 2543 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; 2544 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; 2545 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; 2546 default: 2547 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; 2548 } 2549 2550 lParity = LCR_PAR_NONE; 2551 if (cflag & PARENB) { 2552 if (cflag & CMSPAR) { 2553 if (cflag & PARODD) { 2554 lParity = LCR_PAR_MARK; 2555 dbg("%s - parity = mark", __FUNCTION__); 2556 } else { 2557 lParity = LCR_PAR_SPACE; 2558 dbg("%s - parity = space", __FUNCTION__); 2559 } 2560 } else if (cflag & PARODD) { 2561 lParity = LCR_PAR_ODD; 2562 dbg("%s - parity = odd", __FUNCTION__); 2563 } else { 2564 lParity = LCR_PAR_EVEN; 2565 dbg("%s - parity = even", __FUNCTION__); 2566 } 2567 } else { 2568 dbg("%s - parity = none", __FUNCTION__); 2569 } 2570 2571 if (cflag & CSTOPB) { 2572 lStop = LCR_STOP_2; 2573 dbg("%s - stop bits = 2", __FUNCTION__); 2574 } else { 2575 lStop = LCR_STOP_1; 2576 dbg("%s - stop bits = 1", __FUNCTION__); 2577 } 2578 2579 /* figure out the flow control settings */ 2580 rxFlow = txFlow = 0x00; 2581 if (cflag & CRTSCTS) { 2582 rxFlow |= IOSP_RX_FLOW_RTS; 2583 txFlow |= IOSP_TX_FLOW_CTS; 2584 dbg("%s - RTS/CTS is enabled", __FUNCTION__); 2585 } else { 2586 dbg("%s - RTS/CTS is disabled", __FUNCTION__); 2587 } 2588 2589 /* if we are implementing XON/XOFF, set the start and stop character in the device */ 2590 if (I_IXOFF(tty) || I_IXON(tty)) { 2591 unsigned char stop_char = STOP_CHAR(tty); 2592 unsigned char start_char = START_CHAR(tty); 2593 2594 if ((!edge_serial->is_epic) || 2595 ((edge_serial->is_epic) && 2596 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2597 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char); 2598 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); 2599 } 2600 2601 /* if we are implementing INBOUND XON/XOFF */ 2602 if (I_IXOFF(tty)) { 2603 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2604 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2605 } else { 2606 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); 2607 } 2608 2609 /* if we are implementing OUTBOUND XON/XOFF */ 2610 if (I_IXON(tty)) { 2611 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2612 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); 2613 } else { 2614 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); 2615 } 2616 } 2617 2618 /* Set flow control to the configured value */ 2619 if ((!edge_serial->is_epic) || 2620 ((edge_serial->is_epic) && 2621 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2622 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2623 if ((!edge_serial->is_epic) || 2624 ((edge_serial->is_epic) && 2625 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2626 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2627 2628 2629 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2630 edge_port->shadowLCR |= (lData | lParity | lStop); 2631 2632 edge_port->validDataMask = mask; 2633 2634 /* Send the updated LCR value to the EdgePort */ 2635 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); 2636 if (status != 0) { 2637 return; 2638 } 2639 2640 /* set up the MCR register and send it to the EdgePort */ 2641 edge_port->shadowMCR = MCR_MASTER_IE; 2642 if (cflag & CBAUD) { 2643 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2644 } 2645 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 2646 if (status != 0) { 2647 return; 2648 } 2649 2650 /* Determine divisor based on baud rate */ 2651 baud = tty_get_baud_rate(tty); 2652 if (!baud) { 2653 /* pick a default, any default... */ 2654 baud = 9600; 2655 } 2656 2657 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2658 status = send_cmd_write_baud_rate (edge_port, baud); 2659 2660 return; 2661 } 2662 2663 2664 /**************************************************************************** 2665 * unicode_to_ascii 2666 * Turns a string from Unicode into ASCII. 2667 * Doesn't do a good job with any characters that are outside the normal 2668 * ASCII range, but it's only for debugging... 2669 * NOTE: expects the unicode in LE format 2670 ****************************************************************************/ 2671 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size) 2672 { 2673 int i; 2674 2675 if (buflen <= 0) /* never happens, but... */ 2676 return; 2677 --buflen; /* space for nul */ 2678 2679 for (i = 0; i < unicode_size; i++) { 2680 if (i >= buflen) 2681 break; 2682 string[i] = (char)(le16_to_cpu(unicode[i])); 2683 } 2684 string[i] = 0x00; 2685 } 2686 2687 2688 /**************************************************************************** 2689 * get_manufacturing_desc 2690 * reads in the manufacturing descriptor and stores it into the serial 2691 * structure. 2692 ****************************************************************************/ 2693 static void get_manufacturing_desc (struct edgeport_serial *edge_serial) 2694 { 2695 int response; 2696 2697 dbg("getting manufacturer descriptor"); 2698 2699 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2700 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, 2701 (__u8 *)(&edge_serial->manuf_descriptor)); 2702 2703 if (response < 1) { 2704 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n"); 2705 } else { 2706 char string[30]; 2707 dbg("**Manufacturer Descriptor"); 2708 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); 2709 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); 2710 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); 2711 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); 2712 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); 2713 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); 2714 unicode_to_ascii(string, sizeof(string), 2715 edge_serial->manuf_descriptor.SerialNumber, 2716 edge_serial->manuf_descriptor.SerNumLength/2); 2717 dbg(" SerialNumber: %s", string); 2718 unicode_to_ascii(string, sizeof(string), 2719 edge_serial->manuf_descriptor.AssemblyNumber, 2720 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2721 dbg(" AssemblyNumber: %s", string); 2722 unicode_to_ascii(string, sizeof(string), 2723 edge_serial->manuf_descriptor.OemAssyNumber, 2724 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2725 dbg(" OemAssyNumber: %s", string); 2726 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); 2727 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); 2728 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); 2729 } 2730 } 2731 2732 2733 /**************************************************************************** 2734 * get_boot_desc 2735 * reads in the bootloader descriptor and stores it into the serial 2736 * structure. 2737 ****************************************************************************/ 2738 static void get_boot_desc (struct edgeport_serial *edge_serial) 2739 { 2740 int response; 2741 2742 dbg("getting boot descriptor"); 2743 2744 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2745 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, 2746 (__u8 *)(&edge_serial->boot_descriptor)); 2747 2748 if (response < 1) { 2749 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n"); 2750 } else { 2751 dbg("**Boot Descriptor:"); 2752 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2753 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); 2754 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); 2755 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2756 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2757 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); 2758 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); 2759 } 2760 } 2761 2762 2763 /**************************************************************************** 2764 * load_application_firmware 2765 * This is called to load the application firmware to the device 2766 ****************************************************************************/ 2767 static void load_application_firmware (struct edgeport_serial *edge_serial) 2768 { 2769 struct edge_firmware_image_record *record; 2770 unsigned char *firmware; 2771 unsigned char *FirmwareImage; 2772 int ImageSize; 2773 int response; 2774 2775 2776 switch (edge_serial->product_info.iDownloadFile) { 2777 case EDGE_DOWNLOAD_FILE_I930: 2778 dbg("downloading firmware version (930) %d.%d.%d", 2779 OperationalCodeImageVersion_GEN1.MajorVersion, 2780 OperationalCodeImageVersion_GEN1.MinorVersion, 2781 OperationalCodeImageVersion_GEN1.BuildNumber); 2782 firmware = &OperationalCodeImage_GEN1[0]; 2783 FirmwareImage = &OperationalCodeImage_GEN1[0]; 2784 ImageSize = sizeof(OperationalCodeImage_GEN1); 2785 break; 2786 2787 case EDGE_DOWNLOAD_FILE_80251: 2788 dbg("downloading firmware version (80251) %d.%d.%d", 2789 OperationalCodeImageVersion_GEN2.MajorVersion, 2790 OperationalCodeImageVersion_GEN2.MinorVersion, 2791 OperationalCodeImageVersion_GEN2.BuildNumber); 2792 firmware = &OperationalCodeImage_GEN2[0]; 2793 FirmwareImage = &OperationalCodeImage_GEN2[0]; 2794 ImageSize = sizeof(OperationalCodeImage_GEN2); 2795 break; 2796 2797 case EDGE_DOWNLOAD_FILE_NONE: 2798 dbg ("No download file specified, skipping download\n"); 2799 return; 2800 2801 default: 2802 return; 2803 } 2804 2805 2806 for (;;) { 2807 record = (struct edge_firmware_image_record *)firmware; 2808 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); 2809 if (response < 0) { 2810 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)); 2811 break; 2812 } 2813 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); 2814 if (firmware >= &FirmwareImage[ImageSize]) { 2815 break; 2816 } 2817 } 2818 2819 dbg("sending exec_dl_code"); 2820 response = usb_control_msg (edge_serial->serial->dev, 2821 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2822 USB_REQUEST_ION_EXEC_DL_CODE, 2823 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2824 2825 return; 2826 } 2827 2828 2829 /**************************************************************************** 2830 * edge_startup 2831 ****************************************************************************/ 2832 static int edge_startup (struct usb_serial *serial) 2833 { 2834 struct edgeport_serial *edge_serial; 2835 struct edgeport_port *edge_port; 2836 struct usb_device *dev; 2837 int i, j; 2838 int response; 2839 int interrupt_in_found; 2840 int bulk_in_found; 2841 int bulk_out_found; 2842 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2843 EDGE_COMPATIBILITY_MASK1, 2844 EDGE_COMPATIBILITY_MASK2 }; 2845 2846 dev = serial->dev; 2847 2848 /* create our private serial structure */ 2849 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2850 if (edge_serial == NULL) { 2851 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2852 return -ENOMEM; 2853 } 2854 spin_lock_init(&edge_serial->es_lock); 2855 edge_serial->serial = serial; 2856 usb_set_serial_data(serial, edge_serial); 2857 2858 /* get the name for the device from the device */ 2859 i = get_string(dev, dev->descriptor.iManufacturer, 2860 &edge_serial->name[0], MAX_NAME_LEN+1); 2861 edge_serial->name[i++] = ' '; 2862 get_string(dev, dev->descriptor.iProduct, 2863 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2864 2865 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2866 2867 /* Read the epic descriptor */ 2868 if (get_epic_descriptor(edge_serial) <= 0) { 2869 /* memcpy descriptor to Supports structures */ 2870 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2871 sizeof(struct edge_compatibility_bits)); 2872 2873 /* get the manufacturing descriptor for this device */ 2874 get_manufacturing_desc (edge_serial); 2875 2876 /* get the boot descriptor */ 2877 get_boot_desc (edge_serial); 2878 2879 get_product_info(edge_serial); 2880 } 2881 2882 /* set the number of ports from the manufacturing description */ 2883 /* serial->num_ports = serial->product_info.NumPorts; */ 2884 if ((!edge_serial->is_epic) && 2885 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2886 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 2887 "vs. core thinking we have %d ports, email " 2888 "greg@kroah.com this information.", 2889 edge_serial->product_info.NumPorts, 2890 serial->num_ports); 2891 } 2892 2893 dbg("%s - time 1 %ld", __FUNCTION__, jiffies); 2894 2895 /* If not an EPiC device */ 2896 if (!edge_serial->is_epic) { 2897 /* now load the application firmware into this device */ 2898 load_application_firmware (edge_serial); 2899 2900 dbg("%s - time 2 %ld", __FUNCTION__, jiffies); 2901 2902 /* Check current Edgeport EEPROM and update if necessary */ 2903 update_edgeport_E2PROM (edge_serial); 2904 2905 dbg("%s - time 3 %ld", __FUNCTION__, jiffies); 2906 2907 /* set the configuration to use #1 */ 2908 // dbg("set_configuration 1"); 2909 // usb_set_configuration (dev, 1); 2910 } 2911 2912 /* we set up the pointers to the endpoints in the edge_open function, 2913 * as the structures aren't created yet. */ 2914 2915 /* set up our port private structures */ 2916 for (i = 0; i < serial->num_ports; ++i) { 2917 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); 2918 if (edge_port == NULL) { 2919 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); 2920 for (j = 0; j < i; ++j) { 2921 kfree (usb_get_serial_port_data(serial->port[j])); 2922 usb_set_serial_port_data(serial->port[j], NULL); 2923 } 2924 usb_set_serial_data(serial, NULL); 2925 kfree(edge_serial); 2926 return -ENOMEM; 2927 } 2928 memset (edge_port, 0, sizeof(struct edgeport_port)); 2929 spin_lock_init(&edge_port->ep_lock); 2930 edge_port->port = serial->port[i]; 2931 usb_set_serial_port_data(serial->port[i], edge_port); 2932 } 2933 2934 response = 0; 2935 2936 if (edge_serial->is_epic) { 2937 /* EPIC thing, set up our interrupt polling now and our read urb, so 2938 * that the device knows it really is connected. */ 2939 interrupt_in_found = bulk_in_found = bulk_out_found = FALSE; 2940 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) { 2941 struct usb_endpoint_descriptor *endpoint; 2942 int buffer_size; 2943 2944 endpoint = &serial->interface->altsetting[0].endpoint[i].desc; 2945 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); 2946 if ((!interrupt_in_found) && 2947 (usb_endpoint_is_int_in(endpoint))) { 2948 /* we found a interrupt in endpoint */ 2949 dbg("found interrupt in"); 2950 2951 /* not set up yet, so do it now */ 2952 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL); 2953 if (!edge_serial->interrupt_read_urb) { 2954 err("out of memory"); 2955 return -ENOMEM; 2956 } 2957 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2958 if (!edge_serial->interrupt_in_buffer) { 2959 err("out of memory"); 2960 usb_free_urb(edge_serial->interrupt_read_urb); 2961 return -ENOMEM; 2962 } 2963 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress; 2964 2965 /* set up our interrupt urb */ 2966 usb_fill_int_urb(edge_serial->interrupt_read_urb, 2967 dev, 2968 usb_rcvintpipe(dev, endpoint->bEndpointAddress), 2969 edge_serial->interrupt_in_buffer, 2970 buffer_size, 2971 edge_interrupt_callback, 2972 edge_serial, 2973 endpoint->bInterval); 2974 2975 interrupt_in_found = TRUE; 2976 } 2977 2978 if ((!bulk_in_found) && 2979 (usb_endpoint_is_bulk_in(endpoint))) { 2980 /* we found a bulk in endpoint */ 2981 dbg("found bulk in"); 2982 2983 /* not set up yet, so do it now */ 2984 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL); 2985 if (!edge_serial->read_urb) { 2986 err("out of memory"); 2987 return -ENOMEM; 2988 } 2989 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); 2990 if (!edge_serial->bulk_in_buffer) { 2991 err ("out of memory"); 2992 usb_free_urb(edge_serial->read_urb); 2993 return -ENOMEM; 2994 } 2995 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress; 2996 2997 /* set up our bulk in urb */ 2998 usb_fill_bulk_urb(edge_serial->read_urb, dev, 2999 usb_rcvbulkpipe(dev, endpoint->bEndpointAddress), 3000 edge_serial->bulk_in_buffer, 3001 endpoint->wMaxPacketSize, 3002 edge_bulk_in_callback, 3003 edge_serial); 3004 bulk_in_found = TRUE; 3005 } 3006 3007 if ((!bulk_out_found) && 3008 (usb_endpoint_is_bulk_out(endpoint))) { 3009 /* we found a bulk out endpoint */ 3010 dbg("found bulk out"); 3011 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress; 3012 bulk_out_found = TRUE; 3013 } 3014 } 3015 3016 if ((!interrupt_in_found) || (!bulk_in_found) || (!bulk_out_found)) { 3017 err ("Error - the proper endpoints were not found!"); 3018 return -ENODEV; 3019 } 3020 3021 /* start interrupt read for this edgeport this interrupt will 3022 * continue as long as the edgeport is connected */ 3023 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL); 3024 if (response) 3025 err("%s - Error %d submitting control urb", __FUNCTION__, response); 3026 } 3027 return response; 3028 } 3029 3030 3031 /**************************************************************************** 3032 * edge_shutdown 3033 * This function is called whenever the device is removed from the usb bus. 3034 ****************************************************************************/ 3035 static void edge_shutdown (struct usb_serial *serial) 3036 { 3037 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3038 int i; 3039 3040 dbg("%s", __FUNCTION__); 3041 3042 /* stop reads and writes on all ports */ 3043 for (i=0; i < serial->num_ports; ++i) { 3044 kfree (usb_get_serial_port_data(serial->port[i])); 3045 usb_set_serial_port_data(serial->port[i], NULL); 3046 } 3047 /* free up our endpoint stuff */ 3048 if (edge_serial->is_epic) { 3049 usb_unlink_urb(edge_serial->interrupt_read_urb); 3050 usb_free_urb(edge_serial->interrupt_read_urb); 3051 kfree(edge_serial->interrupt_in_buffer); 3052 3053 usb_unlink_urb(edge_serial->read_urb); 3054 usb_free_urb(edge_serial->read_urb); 3055 kfree(edge_serial->bulk_in_buffer); 3056 } 3057 3058 kfree(edge_serial); 3059 usb_set_serial_data(serial, NULL); 3060 } 3061 3062 3063 /**************************************************************************** 3064 * edgeport_init 3065 * This is called by the module subsystem, or on startup to initialize us 3066 ****************************************************************************/ 3067 static int __init edgeport_init(void) 3068 { 3069 int retval; 3070 3071 retval = usb_serial_register(&edgeport_2port_device); 3072 if (retval) 3073 goto failed_2port_device_register; 3074 retval = usb_serial_register(&edgeport_4port_device); 3075 if (retval) 3076 goto failed_4port_device_register; 3077 retval = usb_serial_register(&edgeport_8port_device); 3078 if (retval) 3079 goto failed_8port_device_register; 3080 retval = usb_serial_register(&epic_device); 3081 if (retval) 3082 goto failed_epic_device_register; 3083 retval = usb_register(&io_driver); 3084 if (retval) 3085 goto failed_usb_register; 3086 info(DRIVER_DESC " " DRIVER_VERSION); 3087 return 0; 3088 3089 failed_usb_register: 3090 usb_serial_deregister(&epic_device); 3091 failed_epic_device_register: 3092 usb_serial_deregister(&edgeport_8port_device); 3093 failed_8port_device_register: 3094 usb_serial_deregister(&edgeport_4port_device); 3095 failed_4port_device_register: 3096 usb_serial_deregister(&edgeport_2port_device); 3097 failed_2port_device_register: 3098 return retval; 3099 } 3100 3101 3102 /**************************************************************************** 3103 * edgeport_exit 3104 * Called when the driver is about to be unloaded. 3105 ****************************************************************************/ 3106 static void __exit edgeport_exit (void) 3107 { 3108 usb_deregister (&io_driver); 3109 usb_serial_deregister (&edgeport_2port_device); 3110 usb_serial_deregister (&edgeport_4port_device); 3111 usb_serial_deregister (&edgeport_8port_device); 3112 usb_serial_deregister (&epic_device); 3113 } 3114 3115 module_init(edgeport_init); 3116 module_exit(edgeport_exit); 3117 3118 /* Module information */ 3119 MODULE_AUTHOR( DRIVER_AUTHOR ); 3120 MODULE_DESCRIPTION( DRIVER_DESC ); 3121 MODULE_LICENSE("GPL"); 3122 3123 module_param(debug, bool, S_IRUGO | S_IWUSR); 3124 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3125 3126 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 3127 MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 3128