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