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