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