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