1 /* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * Edgeport/4 14 * Edgeport/4t 15 * Edgeport/2 16 * Edgeport/4i 17 * Edgeport/2i 18 * Edgeport/421 19 * Edgeport/21 20 * Rapidport/4 21 * Edgeport/8 22 * Edgeport/2D8 23 * Edgeport/4D8 24 * Edgeport/8i 25 * 26 * For questions or problems with this driver, contact Inside Out 27 * Networks technical support, or Peter Berger <pberger@brimson.com>, 28 * or Al Borchers <alborchers@steinerpoint.com>. 29 * 30 */ 31 32 #include <linux/kernel.h> 33 #include <linux/jiffies.h> 34 #include <linux/errno.h> 35 #include <linux/init.h> 36 #include <linux/slab.h> 37 #include <linux/tty.h> 38 #include <linux/tty_driver.h> 39 #include <linux/tty_flip.h> 40 #include <linux/module.h> 41 #include <linux/spinlock.h> 42 #include <linux/serial.h> 43 #include <linux/ioctl.h> 44 #include <linux/wait.h> 45 #include <linux/firmware.h> 46 #include <linux/ihex.h> 47 #include <linux/uaccess.h> 48 #include <linux/usb.h> 49 #include <linux/usb/serial.h> 50 #include "io_edgeport.h" 51 #include "io_ionsp.h" /* info for the iosp messages */ 52 #include "io_16654.h" /* 16654 UART defines */ 53 54 /* 55 * Version Information 56 */ 57 #define DRIVER_VERSION "v2.7" 58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 59 #define DRIVER_DESC "Edgeport USB Serial Driver" 60 61 #define MAX_NAME_LEN 64 62 63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ 64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ 66 67 /* receive port state */ 68 enum RXSTATE { 69 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 70 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 73 }; 74 75 76 /* Transmit Fifo 77 * This Transmit queue is an extension of the edgeport Rx buffer. 78 * The maximum amount of data buffered in both the edgeport 79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 80 */ 81 struct TxFifo { 82 unsigned int head; /* index to head pointer (write) */ 83 unsigned int tail; /* index to tail pointer (read) */ 84 unsigned int count; /* Bytes in queue */ 85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 86 unsigned char *fifo; /* allocated Buffer */ 87 }; 88 89 /* This structure holds all of the local port information */ 90 struct edgeport_port { 91 __u16 txCredits; /* our current credits for this port */ 92 __u16 maxTxCredits; /* the max size of the port */ 93 94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 95 struct urb *write_urb; /* write URB for this port */ 96 bool write_in_progress; /* 'true' while a write URB is outstanding */ 97 spinlock_t ep_lock; 98 99 __u8 shadowLCR; /* last LCR value received */ 100 __u8 shadowMCR; /* last MCR value received */ 101 __u8 shadowMSR; /* last MSR value received */ 102 __u8 shadowLSR; /* last LSR value received */ 103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 105 __u8 validDataMask; 106 __u32 baudRate; 107 108 bool open; 109 bool openPending; 110 bool commandPending; 111 bool closePending; 112 bool chaseResponsePending; 113 114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 118 119 struct async_icount icount; 120 struct usb_serial_port *port; /* loop back to the owner of this object */ 121 }; 122 123 124 /* This structure holds all of the individual device information */ 125 struct edgeport_serial { 126 char name[MAX_NAME_LEN+2]; /* string name of this device */ 127 128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 130 struct edgeport_product_info product_info; /* Product Info */ 131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 132 int is_epic; /* flag if EPiC device or not */ 133 134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 136 struct urb *interrupt_read_urb; /* our interrupt urb */ 137 138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 140 struct urb *read_urb; /* our bulk read urb */ 141 bool read_in_progress; 142 spinlock_t es_lock; 143 144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 145 146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 147 148 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 149 __u8 rxHeader1; /* receive header byte 1 */ 150 __u8 rxHeader2; /* receive header byte 2 */ 151 __u8 rxHeader3; /* receive header byte 3 */ 152 __u8 rxPort; /* the port that we are currently receiving data for */ 153 __u8 rxStatusCode; /* the receive status code */ 154 __u8 rxStatusParam; /* the receive status paramater */ 155 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 156 struct usb_serial *serial; /* loop back to the owner of this object */ 157 }; 158 159 /* baud rate information */ 160 struct divisor_table_entry { 161 __u32 BaudRate; 162 __u16 Divisor; 163 }; 164 165 /* 166 * Define table of divisors for Rev A EdgePort/4 hardware 167 * These assume a 3.6864MHz crystal, the standard /16, and 168 * MCR.7 = 0. 169 */ 170 171 static const struct divisor_table_entry divisor_table[] = { 172 { 50, 4608}, 173 { 75, 3072}, 174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 176 { 150, 1536}, 177 { 300, 768}, 178 { 600, 384}, 179 { 1200, 192}, 180 { 1800, 128}, 181 { 2400, 96}, 182 { 4800, 48}, 183 { 7200, 32}, 184 { 9600, 24}, 185 { 14400, 16}, 186 { 19200, 12}, 187 { 38400, 6}, 188 { 57600, 4}, 189 { 115200, 2}, 190 { 230400, 1}, 191 }; 192 193 /* local variables */ 194 static bool debug; 195 196 /* Number of outstanding Command Write Urbs */ 197 static atomic_t CmdUrbs = ATOMIC_INIT(0); 198 199 200 /* local function prototypes */ 201 202 /* function prototypes for all URB callbacks */ 203 static void edge_interrupt_callback(struct urb *urb); 204 static void edge_bulk_in_callback(struct urb *urb); 205 static void edge_bulk_out_data_callback(struct urb *urb); 206 static void edge_bulk_out_cmd_callback(struct urb *urb); 207 208 /* function prototypes for the usbserial callbacks */ 209 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); 210 static void edge_close(struct usb_serial_port *port); 211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 212 const unsigned char *buf, int count); 213 static int edge_write_room(struct tty_struct *tty); 214 static int edge_chars_in_buffer(struct tty_struct *tty); 215 static void edge_throttle(struct tty_struct *tty); 216 static void edge_unthrottle(struct tty_struct *tty); 217 static void edge_set_termios(struct tty_struct *tty, 218 struct usb_serial_port *port, 219 struct ktermios *old_termios); 220 static int edge_ioctl(struct tty_struct *tty, 221 unsigned int cmd, unsigned long arg); 222 static void edge_break(struct tty_struct *tty, int break_state); 223 static int edge_tiocmget(struct tty_struct *tty); 224 static int edge_tiocmset(struct tty_struct *tty, 225 unsigned int set, unsigned int clear); 226 static int edge_get_icount(struct tty_struct *tty, 227 struct serial_icounter_struct *icount); 228 static int edge_startup(struct usb_serial *serial); 229 static void edge_disconnect(struct usb_serial *serial); 230 static void edge_release(struct usb_serial *serial); 231 232 #include "io_tables.h" /* all of the devices that this driver supports */ 233 234 /* function prototypes for all of our local functions */ 235 236 static void process_rcvd_data(struct edgeport_serial *edge_serial, 237 unsigned char *buffer, __u16 bufferLength); 238 static void process_rcvd_status(struct edgeport_serial *edge_serial, 239 __u8 byte2, __u8 byte3); 240 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 241 unsigned char *data, int length); 242 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 243 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 244 __u8 lsr, __u8 data); 245 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 246 __u8 param); 247 static int calc_baud_rate_divisor(int baud_rate, int *divisor); 248 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 249 int baudRate); 250 static void change_port_settings(struct tty_struct *tty, 251 struct edgeport_port *edge_port, 252 struct ktermios *old_termios); 253 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 254 __u8 regNum, __u8 regValue); 255 static int write_cmd_usb(struct edgeport_port *edge_port, 256 unsigned char *buffer, int writeLength); 257 static void send_more_port_data(struct edgeport_serial *edge_serial, 258 struct edgeport_port *edge_port); 259 260 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 261 __u16 length, const __u8 *data); 262 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 263 __u16 length, __u8 *data); 264 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 265 __u16 length, const __u8 *data); 266 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 267 static void get_boot_desc(struct edgeport_serial *edge_serial); 268 static void load_application_firmware(struct edgeport_serial *edge_serial); 269 270 static void unicode_to_ascii(char *string, int buflen, 271 __le16 *unicode, int unicode_size); 272 273 274 /* ************************************************************************ */ 275 /* ************************************************************************ */ 276 /* ************************************************************************ */ 277 /* ************************************************************************ */ 278 279 /************************************************************************ 280 * * 281 * update_edgeport_E2PROM() Compare current versions of * 282 * Boot ROM and Manufacture * 283 * Descriptors with versions * 284 * embedded in this driver * 285 * * 286 ************************************************************************/ 287 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 288 { 289 __u32 BootCurVer; 290 __u32 BootNewVer; 291 __u8 BootMajorVersion; 292 __u8 BootMinorVersion; 293 __u16 BootBuildNumber; 294 __u32 Bootaddr; 295 const struct ihex_binrec *rec; 296 const struct firmware *fw; 297 const char *fw_name; 298 int response; 299 300 switch (edge_serial->product_info.iDownloadFile) { 301 case EDGE_DOWNLOAD_FILE_I930: 302 fw_name = "edgeport/boot.fw"; 303 break; 304 case EDGE_DOWNLOAD_FILE_80251: 305 fw_name = "edgeport/boot2.fw"; 306 break; 307 default: 308 return; 309 } 310 311 response = request_ihex_firmware(&fw, fw_name, 312 &edge_serial->serial->dev->dev); 313 if (response) { 314 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 315 fw_name, response); 316 return; 317 } 318 319 rec = (const struct ihex_binrec *)fw->data; 320 BootMajorVersion = rec->data[0]; 321 BootMinorVersion = rec->data[1]; 322 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 323 324 /* Check Boot Image Version */ 325 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 326 (edge_serial->boot_descriptor.MinorVersion << 16) + 327 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 328 329 BootNewVer = (BootMajorVersion << 24) + 330 (BootMinorVersion << 16) + 331 BootBuildNumber; 332 333 dbg("Current Boot Image version %d.%d.%d", 334 edge_serial->boot_descriptor.MajorVersion, 335 edge_serial->boot_descriptor.MinorVersion, 336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 337 338 339 if (BootNewVer > BootCurVer) { 340 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", 341 edge_serial->boot_descriptor.MajorVersion, 342 edge_serial->boot_descriptor.MinorVersion, 343 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 344 BootMajorVersion, BootMinorVersion, BootBuildNumber); 345 346 dbg("Downloading new Boot Image"); 347 348 for (rec = ihex_next_binrec(rec); rec; 349 rec = ihex_next_binrec(rec)) { 350 Bootaddr = be32_to_cpu(rec->addr); 351 response = rom_write(edge_serial->serial, 352 Bootaddr >> 16, 353 Bootaddr & 0xFFFF, 354 be16_to_cpu(rec->len), 355 &rec->data[0]); 356 if (response < 0) { 357 dev_err(&edge_serial->serial->dev->dev, 358 "rom_write failed (%x, %x, %d)\n", 359 Bootaddr >> 16, Bootaddr & 0xFFFF, 360 be16_to_cpu(rec->len)); 361 break; 362 } 363 } 364 } else { 365 dbg("Boot Image -- already up to date"); 366 } 367 release_firmware(fw); 368 } 369 370 #if 0 371 /************************************************************************ 372 * 373 * Get string descriptor from device 374 * 375 ************************************************************************/ 376 static int get_string_desc(struct usb_device *dev, int Id, 377 struct usb_string_descriptor **pRetDesc) 378 { 379 struct usb_string_descriptor StringDesc; 380 struct usb_string_descriptor *pStringDesc; 381 382 dbg("%s - USB String ID = %d", __func__, Id); 383 384 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 385 sizeof(StringDesc))) 386 return 0; 387 388 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 389 if (!pStringDesc) 390 return -1; 391 392 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 393 StringDesc.bLength)) { 394 kfree(pStringDesc); 395 return -1; 396 } 397 398 *pRetDesc = pStringDesc; 399 return 0; 400 } 401 #endif 402 403 static void dump_product_info(struct edgeport_product_info *product_info) 404 { 405 /* Dump Product Info structure */ 406 dbg("**Product Information:"); 407 dbg(" ProductId %x", product_info->ProductId); 408 dbg(" NumPorts %d", product_info->NumPorts); 409 dbg(" ProdInfoVer %d", product_info->ProdInfoVer); 410 dbg(" IsServer %d", product_info->IsServer); 411 dbg(" IsRS232 %d", product_info->IsRS232); 412 dbg(" IsRS422 %d", product_info->IsRS422); 413 dbg(" IsRS485 %d", product_info->IsRS485); 414 dbg(" RomSize %d", product_info->RomSize); 415 dbg(" RamSize %d", product_info->RamSize); 416 dbg(" CpuRev %x", product_info->CpuRev); 417 dbg(" BoardRev %x", product_info->BoardRev); 418 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, 419 product_info->BootMinorVersion, 420 le16_to_cpu(product_info->BootBuildNumber)); 421 dbg(" FirmwareMajorVersion %d.%d.%d", 422 product_info->FirmwareMajorVersion, 423 product_info->FirmwareMinorVersion, 424 le16_to_cpu(product_info->FirmwareBuildNumber)); 425 dbg(" ManufactureDescDate %d/%d/%d", 426 product_info->ManufactureDescDate[0], 427 product_info->ManufactureDescDate[1], 428 product_info->ManufactureDescDate[2]+1900); 429 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); 430 dbg(" EpicVer %d", product_info->EpicVer); 431 } 432 433 static void get_product_info(struct edgeport_serial *edge_serial) 434 { 435 struct edgeport_product_info *product_info = &edge_serial->product_info; 436 437 memset(product_info, 0, sizeof(struct edgeport_product_info)); 438 439 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 440 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 441 product_info->ProdInfoVer = 0; 442 443 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 444 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 445 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 446 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 447 448 product_info->BootMajorVersion = 449 edge_serial->boot_descriptor.MajorVersion; 450 product_info->BootMinorVersion = 451 edge_serial->boot_descriptor.MinorVersion; 452 product_info->BootBuildNumber = 453 edge_serial->boot_descriptor.BuildNumber; 454 455 memcpy(product_info->ManufactureDescDate, 456 edge_serial->manuf_descriptor.DescDate, 457 sizeof(edge_serial->manuf_descriptor.DescDate)); 458 459 /* check if this is 2nd generation hardware */ 460 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 461 & ION_DEVICE_ID_80251_NETCHIP) 462 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 463 else 464 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 465 466 /* Determine Product type and set appropriate flags */ 467 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 468 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 469 case ION_DEVICE_ID_EDGEPORT_4T: 470 case ION_DEVICE_ID_EDGEPORT_4: 471 case ION_DEVICE_ID_EDGEPORT_2: 472 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 473 case ION_DEVICE_ID_EDGEPORT_8: 474 case ION_DEVICE_ID_EDGEPORT_421: 475 case ION_DEVICE_ID_EDGEPORT_21: 476 case ION_DEVICE_ID_EDGEPORT_2_DIN: 477 case ION_DEVICE_ID_EDGEPORT_4_DIN: 478 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 479 product_info->IsRS232 = 1; 480 break; 481 482 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 483 product_info->IsRS422 = 1; 484 product_info->IsRS485 = 1; 485 break; 486 487 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 488 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 489 product_info->IsRS422 = 1; 490 break; 491 } 492 493 dump_product_info(product_info); 494 } 495 496 static int get_epic_descriptor(struct edgeport_serial *ep) 497 { 498 int result; 499 struct usb_serial *serial = ep->serial; 500 struct edgeport_product_info *product_info = &ep->product_info; 501 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 502 struct edge_compatibility_bits *bits; 503 504 ep->is_epic = 0; 505 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 506 USB_REQUEST_ION_GET_EPIC_DESC, 507 0xC0, 0x00, 0x00, 508 &ep->epic_descriptor, 509 sizeof(struct edge_compatibility_descriptor), 510 300); 511 512 dbg("%s result = %d", __func__, result); 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(product_info); 528 529 bits = &ep->epic_descriptor.Supports; 530 dbg("**EPIC descriptor:"); 531 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE"); 532 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE"); 533 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE"); 534 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE"); 535 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 536 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 537 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE"); 538 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE"); 539 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 540 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 541 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 542 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 543 dbg(" TrueEdgeport : %s", 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 edgeport_port *edge_port; 566 struct usb_serial_port *port; 567 struct tty_struct *tty; 568 unsigned char *data = urb->transfer_buffer; 569 int length = urb->actual_length; 570 int bytes_avail; 571 int position; 572 int txCredits; 573 int portNumber; 574 int result; 575 int status = urb->status; 576 577 dbg("%s", __func__); 578 579 switch (status) { 580 case 0: 581 /* success */ 582 break; 583 case -ECONNRESET: 584 case -ENOENT: 585 case -ESHUTDOWN: 586 /* this urb is terminated, clean up */ 587 dbg("%s - urb shutting down with status: %d", 588 __func__, status); 589 return; 590 default: 591 dbg("%s - nonzero urb status received: %d", __func__, status); 592 goto exit; 593 } 594 595 /* process this interrupt-read even if there are no ports open */ 596 if (length) { 597 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 598 __func__, length, data); 599 600 if (length > 1) { 601 bytes_avail = data[0] | (data[1] << 8); 602 if (bytes_avail) { 603 spin_lock(&edge_serial->es_lock); 604 edge_serial->rxBytesAvail += bytes_avail; 605 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); 606 607 if (edge_serial->rxBytesAvail > 0 && 608 !edge_serial->read_in_progress) { 609 dbg("%s - posting a read", __func__); 610 edge_serial->read_in_progress = true; 611 612 /* we have pending bytes on the 613 bulk in pipe, send a request */ 614 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 615 if (result) { 616 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result); 617 edge_serial->read_in_progress = false; 618 } 619 } 620 spin_unlock(&edge_serial->es_lock); 621 } 622 } 623 /* grab the txcredits for the ports if available */ 624 position = 2; 625 portNumber = 0; 626 while ((position < length) && 627 (portNumber < edge_serial->serial->num_ports)) { 628 txCredits = data[position] | (data[position+1] << 8); 629 if (txCredits) { 630 port = edge_serial->serial->port[portNumber]; 631 edge_port = usb_get_serial_port_data(port); 632 if (edge_port->open) { 633 spin_lock(&edge_port->ep_lock); 634 edge_port->txCredits += txCredits; 635 spin_unlock(&edge_port->ep_lock); 636 dbg("%s - txcredits for port%d = %d", 637 __func__, portNumber, 638 edge_port->txCredits); 639 640 /* tell the tty driver that something 641 has changed */ 642 tty = tty_port_tty_get( 643 &edge_port->port->port); 644 if (tty) { 645 tty_wakeup(tty); 646 tty_kref_put(tty); 647 } 648 /* Since we have more credit, check 649 if more data can be sent */ 650 send_more_port_data(edge_serial, 651 edge_port); 652 } 653 } 654 position += 2; 655 ++portNumber; 656 } 657 } 658 659 exit: 660 result = usb_submit_urb(urb, GFP_ATOMIC); 661 if (result) 662 dev_err(&urb->dev->dev, 663 "%s - Error %d submitting control urb\n", 664 __func__, result); 665 } 666 667 668 /***************************************************************************** 669 * edge_bulk_in_callback 670 * this is the callback function for when we have received data on the 671 * bulk in endpoint. 672 *****************************************************************************/ 673 static void edge_bulk_in_callback(struct urb *urb) 674 { 675 struct edgeport_serial *edge_serial = urb->context; 676 unsigned char *data = urb->transfer_buffer; 677 int retval; 678 __u16 raw_data_length; 679 int status = urb->status; 680 681 dbg("%s", __func__); 682 683 if (status) { 684 dbg("%s - nonzero read bulk status received: %d", 685 __func__, status); 686 edge_serial->read_in_progress = false; 687 return; 688 } 689 690 if (urb->actual_length == 0) { 691 dbg("%s - read bulk callback with no data", __func__); 692 edge_serial->read_in_progress = false; 693 return; 694 } 695 696 raw_data_length = urb->actual_length; 697 698 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 699 __func__, raw_data_length, data); 700 701 spin_lock(&edge_serial->es_lock); 702 703 /* decrement our rxBytes available by the number that we just got */ 704 edge_serial->rxBytesAvail -= raw_data_length; 705 706 dbg("%s - Received = %d, rxBytesAvail %d", __func__, 707 raw_data_length, edge_serial->rxBytesAvail); 708 709 process_rcvd_data(edge_serial, data, urb->actual_length); 710 711 /* check to see if there's any more data for us to read */ 712 if (edge_serial->rxBytesAvail > 0) { 713 dbg("%s - posting a read", __func__); 714 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 715 if (retval) { 716 dev_err(&urb->dev->dev, 717 "%s - usb_submit_urb(read bulk) failed, " 718 "retval = %d\n", __func__, retval); 719 edge_serial->read_in_progress = false; 720 } 721 } else { 722 edge_serial->read_in_progress = false; 723 } 724 725 spin_unlock(&edge_serial->es_lock); 726 } 727 728 729 /***************************************************************************** 730 * edge_bulk_out_data_callback 731 * this is the callback function for when we have finished sending 732 * serial data on the bulk out endpoint. 733 *****************************************************************************/ 734 static void edge_bulk_out_data_callback(struct urb *urb) 735 { 736 struct edgeport_port *edge_port = urb->context; 737 struct tty_struct *tty; 738 int status = urb->status; 739 740 dbg("%s", __func__); 741 742 if (status) { 743 dbg("%s - nonzero write bulk status received: %d", 744 __func__, status); 745 } 746 747 tty = tty_port_tty_get(&edge_port->port->port); 748 749 if (tty && edge_port->open) { 750 /* let the tty driver wakeup if it has a special 751 write_wakeup function */ 752 tty_wakeup(tty); 753 } 754 tty_kref_put(tty); 755 756 /* Release the Write URB */ 757 edge_port->write_in_progress = false; 758 759 /* Check if more data needs to be sent */ 760 send_more_port_data((struct edgeport_serial *) 761 (usb_get_serial_data(edge_port->port->serial)), edge_port); 762 } 763 764 765 /***************************************************************************** 766 * BulkOutCmdCallback 767 * this is the callback function for when we have finished sending a 768 * command on the bulk out endpoint. 769 *****************************************************************************/ 770 static void edge_bulk_out_cmd_callback(struct urb *urb) 771 { 772 struct edgeport_port *edge_port = urb->context; 773 struct tty_struct *tty; 774 int status = urb->status; 775 776 dbg("%s", __func__); 777 778 atomic_dec(&CmdUrbs); 779 dbg("%s - FREE URB %p (outstanding %d)", __func__, 780 urb, atomic_read(&CmdUrbs)); 781 782 783 /* clean up the transfer buffer */ 784 kfree(urb->transfer_buffer); 785 786 /* Free the command urb */ 787 usb_free_urb(urb); 788 789 if (status) { 790 dbg("%s - nonzero write bulk status received: %d", 791 __func__, status); 792 return; 793 } 794 795 /* Get pointer to tty */ 796 tty = tty_port_tty_get(&edge_port->port->port); 797 798 /* tell the tty driver that something has changed */ 799 if (tty && edge_port->open) 800 tty_wakeup(tty); 801 tty_kref_put(tty); 802 803 /* we have completed the command */ 804 edge_port->commandPending = false; 805 wake_up(&edge_port->wait_command); 806 } 807 808 809 /***************************************************************************** 810 * Driver tty interface functions 811 *****************************************************************************/ 812 813 /***************************************************************************** 814 * SerialOpen 815 * this function is called by the tty driver when a port is opened 816 * If successful, we return 0 817 * Otherwise we return a negative error number. 818 *****************************************************************************/ 819 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 820 { 821 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 822 struct usb_serial *serial; 823 struct edgeport_serial *edge_serial; 824 int response; 825 826 dbg("%s - port %d", __func__, port->number); 827 828 if (edge_port == NULL) 829 return -ENODEV; 830 831 /* see if we've set up our endpoint info yet (can't set it up 832 in edge_startup as the structures were not set up at that time.) */ 833 serial = port->serial; 834 edge_serial = usb_get_serial_data(serial); 835 if (edge_serial == NULL) 836 return -ENODEV; 837 if (edge_serial->interrupt_in_buffer == NULL) { 838 struct usb_serial_port *port0 = serial->port[0]; 839 840 /* not set up yet, so do it now */ 841 edge_serial->interrupt_in_buffer = 842 port0->interrupt_in_buffer; 843 edge_serial->interrupt_in_endpoint = 844 port0->interrupt_in_endpointAddress; 845 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 846 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 847 edge_serial->bulk_in_endpoint = 848 port0->bulk_in_endpointAddress; 849 edge_serial->read_urb = port0->read_urb; 850 edge_serial->bulk_out_endpoint = 851 port0->bulk_out_endpointAddress; 852 853 /* set up our interrupt urb */ 854 usb_fill_int_urb(edge_serial->interrupt_read_urb, 855 serial->dev, 856 usb_rcvintpipe(serial->dev, 857 port0->interrupt_in_endpointAddress), 858 port0->interrupt_in_buffer, 859 edge_serial->interrupt_read_urb->transfer_buffer_length, 860 edge_interrupt_callback, edge_serial, 861 edge_serial->interrupt_read_urb->interval); 862 863 /* set up our bulk in urb */ 864 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 865 usb_rcvbulkpipe(serial->dev, 866 port0->bulk_in_endpointAddress), 867 port0->bulk_in_buffer, 868 edge_serial->read_urb->transfer_buffer_length, 869 edge_bulk_in_callback, edge_serial); 870 edge_serial->read_in_progress = false; 871 872 /* start interrupt read for this edgeport 873 * this interrupt will continue as long 874 * as the edgeport is connected */ 875 response = usb_submit_urb(edge_serial->interrupt_read_urb, 876 GFP_KERNEL); 877 if (response) { 878 dev_err(&port->dev, 879 "%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(&port->dev, "%s - error sending open port command\n", 906 __func__); 907 edge_port->openPending = false; 908 return -ENODEV; 909 } 910 911 /* now wait for the port to be completely opened */ 912 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 913 OPEN_TIMEOUT); 914 915 if (!edge_port->open) { 916 /* open timed out */ 917 dbg("%s - open timedout", __func__); 918 edge_port->openPending = false; 919 return -ENODEV; 920 } 921 922 /* create the txfifo */ 923 edge_port->txfifo.head = 0; 924 edge_port->txfifo.tail = 0; 925 edge_port->txfifo.count = 0; 926 edge_port->txfifo.size = edge_port->maxTxCredits; 927 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 928 929 if (!edge_port->txfifo.fifo) { 930 dbg("%s - no memory", __func__); 931 edge_close(port); 932 return -ENOMEM; 933 } 934 935 /* Allocate a URB for the write */ 936 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 937 edge_port->write_in_progress = false; 938 939 if (!edge_port->write_urb) { 940 dbg("%s - no memory", __func__); 941 edge_close(port); 942 return -ENOMEM; 943 } 944 945 dbg("%s(%d) - Initialize TX fifo to %d bytes", 946 __func__, port->number, edge_port->maxTxCredits); 947 948 dbg("%s exited", __func__); 949 950 return 0; 951 } 952 953 954 /************************************************************************ 955 * 956 * block_until_chase_response 957 * 958 * This function will block the close until one of the following: 959 * 1. Response to our Chase comes from Edgeport 960 * 2. A timeout of 10 seconds without activity has expired 961 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 962 * 963 ************************************************************************/ 964 static void block_until_chase_response(struct edgeport_port *edge_port) 965 { 966 DEFINE_WAIT(wait); 967 __u16 lastCredits; 968 int timeout = 1*HZ; 969 int loop = 10; 970 971 while (1) { 972 /* Save Last credits */ 973 lastCredits = edge_port->txCredits; 974 975 /* Did we get our Chase response */ 976 if (!edge_port->chaseResponsePending) { 977 dbg("%s - Got Chase Response", __func__); 978 979 /* did we get all of our credit back? */ 980 if (edge_port->txCredits == edge_port->maxTxCredits) { 981 dbg("%s - Got all credits", __func__); 982 return; 983 } 984 } 985 986 /* Block the thread for a while */ 987 prepare_to_wait(&edge_port->wait_chase, &wait, 988 TASK_UNINTERRUPTIBLE); 989 schedule_timeout(timeout); 990 finish_wait(&edge_port->wait_chase, &wait); 991 992 if (lastCredits == edge_port->txCredits) { 993 /* No activity.. count down. */ 994 loop--; 995 if (loop == 0) { 996 edge_port->chaseResponsePending = false; 997 dbg("%s - Chase TIMEOUT", __func__); 998 return; 999 } 1000 } else { 1001 /* Reset timeout value back to 10 seconds */ 1002 dbg("%s - Last %d, Current %d", __func__, 1003 lastCredits, edge_port->txCredits); 1004 loop = 10; 1005 } 1006 } 1007 } 1008 1009 1010 /************************************************************************ 1011 * 1012 * block_until_tx_empty 1013 * 1014 * This function will block the close until one of the following: 1015 * 1. TX count are 0 1016 * 2. The edgeport has stopped 1017 * 3. A timeout of 3 seconds without activity has expired 1018 * 1019 ************************************************************************/ 1020 static void block_until_tx_empty(struct edgeport_port *edge_port) 1021 { 1022 DEFINE_WAIT(wait); 1023 struct TxFifo *fifo = &edge_port->txfifo; 1024 __u32 lastCount; 1025 int timeout = HZ/10; 1026 int loop = 30; 1027 1028 while (1) { 1029 /* Save Last count */ 1030 lastCount = fifo->count; 1031 1032 /* Is the Edgeport Buffer empty? */ 1033 if (lastCount == 0) { 1034 dbg("%s - TX Buffer Empty", __func__); 1035 return; 1036 } 1037 1038 /* Block the thread for a while */ 1039 prepare_to_wait(&edge_port->wait_chase, &wait, 1040 TASK_UNINTERRUPTIBLE); 1041 schedule_timeout(timeout); 1042 finish_wait(&edge_port->wait_chase, &wait); 1043 1044 dbg("%s wait", __func__); 1045 1046 if (lastCount == fifo->count) { 1047 /* No activity.. count down. */ 1048 loop--; 1049 if (loop == 0) { 1050 dbg("%s - TIMEOUT", __func__); 1051 return; 1052 } 1053 } else { 1054 /* Reset timeout value back to seconds */ 1055 loop = 30; 1056 } 1057 } 1058 } 1059 1060 1061 /***************************************************************************** 1062 * edge_close 1063 * this function is called by the tty driver when a port is closed 1064 *****************************************************************************/ 1065 static void edge_close(struct usb_serial_port *port) 1066 { 1067 struct edgeport_serial *edge_serial; 1068 struct edgeport_port *edge_port; 1069 int status; 1070 1071 dbg("%s - port %d", __func__, port->number); 1072 1073 edge_serial = usb_get_serial_data(port->serial); 1074 edge_port = usb_get_serial_port_data(port); 1075 if (edge_serial == NULL || edge_port == NULL) 1076 return; 1077 1078 /* block until tx is empty */ 1079 block_until_tx_empty(edge_port); 1080 1081 edge_port->closePending = true; 1082 1083 if ((!edge_serial->is_epic) || 1084 ((edge_serial->is_epic) && 1085 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1086 /* flush and chase */ 1087 edge_port->chaseResponsePending = true; 1088 1089 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1090 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1091 if (status == 0) 1092 /* block until chase finished */ 1093 block_until_chase_response(edge_port); 1094 else 1095 edge_port->chaseResponsePending = false; 1096 } 1097 1098 if ((!edge_serial->is_epic) || 1099 ((edge_serial->is_epic) && 1100 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1101 /* close the port */ 1102 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__); 1103 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1104 } 1105 1106 /* port->close = true; */ 1107 edge_port->closePending = false; 1108 edge_port->open = false; 1109 edge_port->openPending = false; 1110 1111 usb_kill_urb(edge_port->write_urb); 1112 1113 if (edge_port->write_urb) { 1114 /* if this urb had a transfer buffer already 1115 (old transfer) free it */ 1116 kfree(edge_port->write_urb->transfer_buffer); 1117 usb_free_urb(edge_port->write_urb); 1118 edge_port->write_urb = NULL; 1119 } 1120 kfree(edge_port->txfifo.fifo); 1121 edge_port->txfifo.fifo = NULL; 1122 1123 dbg("%s exited", __func__); 1124 } 1125 1126 /***************************************************************************** 1127 * SerialWrite 1128 * this function is called by the tty driver when data should be written 1129 * to the port. 1130 * If successful, we return the number of bytes written, otherwise we 1131 * return a negative error number. 1132 *****************************************************************************/ 1133 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1134 const unsigned char *data, int count) 1135 { 1136 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1137 struct TxFifo *fifo; 1138 int copySize; 1139 int bytesleft; 1140 int firsthalf; 1141 int secondhalf; 1142 unsigned long flags; 1143 1144 dbg("%s - port %d", __func__, port->number); 1145 1146 if (edge_port == NULL) 1147 return -ENODEV; 1148 1149 /* get a pointer to the Tx fifo */ 1150 fifo = &edge_port->txfifo; 1151 1152 spin_lock_irqsave(&edge_port->ep_lock, flags); 1153 1154 /* calculate number of bytes to put in fifo */ 1155 copySize = min((unsigned int)count, 1156 (edge_port->txCredits - fifo->count)); 1157 1158 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", 1159 __func__, port->number, count, 1160 edge_port->txCredits - fifo->count, copySize); 1161 1162 /* catch writes of 0 bytes which the tty driver likes to give us, 1163 and when txCredits is empty */ 1164 if (copySize == 0) { 1165 dbg("%s - copySize = Zero", __func__); 1166 goto finish_write; 1167 } 1168 1169 /* queue the data 1170 * since we can never overflow the buffer we do not have to check for a 1171 * full condition 1172 * 1173 * the copy is done is two parts -- first fill to the end of the buffer 1174 * then copy the reset from the start of the buffer 1175 */ 1176 bytesleft = fifo->size - fifo->head; 1177 firsthalf = min(bytesleft, copySize); 1178 dbg("%s - copy %d bytes of %d into fifo ", __func__, 1179 firsthalf, bytesleft); 1180 1181 /* now copy our data */ 1182 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1183 usb_serial_debug_data(debug, &port->dev, __func__, 1184 firsthalf, &fifo->fifo[fifo->head]); 1185 1186 /* update the index and size */ 1187 fifo->head += firsthalf; 1188 fifo->count += firsthalf; 1189 1190 /* wrap the index */ 1191 if (fifo->head == fifo->size) 1192 fifo->head = 0; 1193 1194 secondhalf = copySize-firsthalf; 1195 1196 if (secondhalf) { 1197 dbg("%s - copy rest of data %d", __func__, secondhalf); 1198 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1199 usb_serial_debug_data(debug, &port->dev, __func__, 1200 secondhalf, &fifo->fifo[fifo->head]); 1201 /* update the index and size */ 1202 fifo->count += secondhalf; 1203 fifo->head += secondhalf; 1204 /* No need to check for wrap since we can not get to end of 1205 * the fifo in this part 1206 */ 1207 } 1208 1209 finish_write: 1210 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1211 1212 send_more_port_data((struct edgeport_serial *) 1213 usb_get_serial_data(port->serial), edge_port); 1214 1215 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__, 1216 copySize, edge_port->txCredits, fifo->count); 1217 1218 return copySize; 1219 } 1220 1221 1222 /************************************************************************ 1223 * 1224 * send_more_port_data() 1225 * 1226 * This routine attempts to write additional UART transmit data 1227 * to a port over the USB bulk pipe. It is called (1) when new 1228 * data has been written to a port's TxBuffer from higher layers 1229 * (2) when the peripheral sends us additional TxCredits indicating 1230 * that it can accept more Tx data for a given port; and (3) when 1231 * a bulk write completes successfully and we want to see if we 1232 * can transmit more. 1233 * 1234 ************************************************************************/ 1235 static void send_more_port_data(struct edgeport_serial *edge_serial, 1236 struct edgeport_port *edge_port) 1237 { 1238 struct TxFifo *fifo = &edge_port->txfifo; 1239 struct urb *urb; 1240 unsigned char *buffer; 1241 int status; 1242 int count; 1243 int bytesleft; 1244 int firsthalf; 1245 int secondhalf; 1246 unsigned long flags; 1247 1248 dbg("%s(%d)", __func__, edge_port->port->number); 1249 1250 spin_lock_irqsave(&edge_port->ep_lock, flags); 1251 1252 if (edge_port->write_in_progress || 1253 !edge_port->open || 1254 (fifo->count == 0)) { 1255 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", 1256 __func__, edge_port->port->number, 1257 fifo->count, edge_port->write_in_progress); 1258 goto exit_send; 1259 } 1260 1261 /* since the amount of data in the fifo will always fit into the 1262 * edgeport buffer we do not need to check the write length 1263 * 1264 * Do we have enough credits for this port to make it worthwhile 1265 * to bother queueing a write. If it's too small, say a few bytes, 1266 * it's better to wait for more credits so we can do a larger write. 1267 */ 1268 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1269 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", 1270 __func__, edge_port->port->number, fifo->count, 1271 edge_port->txCredits); 1272 goto exit_send; 1273 } 1274 1275 /* lock this write */ 1276 edge_port->write_in_progress = true; 1277 1278 /* get a pointer to the write_urb */ 1279 urb = edge_port->write_urb; 1280 1281 /* make sure transfer buffer is freed */ 1282 kfree(urb->transfer_buffer); 1283 urb->transfer_buffer = NULL; 1284 1285 /* build the data header for the buffer and port that we are about 1286 to send out */ 1287 count = fifo->count; 1288 buffer = kmalloc(count+2, GFP_ATOMIC); 1289 if (buffer == NULL) { 1290 dev_err_console(edge_port->port, 1291 "%s - no more kernel memory...\n", __func__); 1292 edge_port->write_in_progress = false; 1293 goto exit_send; 1294 } 1295 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number 1296 - edge_port->port->serial->minor, count); 1297 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number 1298 - edge_port->port->serial->minor, count); 1299 1300 /* now copy our data */ 1301 bytesleft = fifo->size - fifo->tail; 1302 firsthalf = min(bytesleft, count); 1303 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1304 fifo->tail += firsthalf; 1305 fifo->count -= firsthalf; 1306 if (fifo->tail == fifo->size) 1307 fifo->tail = 0; 1308 1309 secondhalf = count-firsthalf; 1310 if (secondhalf) { 1311 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1312 secondhalf); 1313 fifo->tail += secondhalf; 1314 fifo->count -= secondhalf; 1315 } 1316 1317 if (count) 1318 usb_serial_debug_data(debug, &edge_port->port->dev, 1319 __func__, count, &buffer[2]); 1320 1321 /* fill up the urb with all of our data and submit it */ 1322 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1323 usb_sndbulkpipe(edge_serial->serial->dev, 1324 edge_serial->bulk_out_endpoint), 1325 buffer, count+2, 1326 edge_bulk_out_data_callback, edge_port); 1327 1328 /* decrement the number of credits we have by the number we just sent */ 1329 edge_port->txCredits -= count; 1330 edge_port->icount.tx += count; 1331 1332 status = usb_submit_urb(urb, GFP_ATOMIC); 1333 if (status) { 1334 /* something went wrong */ 1335 dev_err_console(edge_port->port, 1336 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1337 __func__, status); 1338 edge_port->write_in_progress = false; 1339 1340 /* revert the credits as something bad happened. */ 1341 edge_port->txCredits += count; 1342 edge_port->icount.tx -= count; 1343 } 1344 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", 1345 __func__, count, edge_port->txCredits, fifo->count); 1346 1347 exit_send: 1348 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1349 } 1350 1351 1352 /***************************************************************************** 1353 * edge_write_room 1354 * this function is called by the tty driver when it wants to know how 1355 * many bytes of data we can accept for a specific port. If successful, 1356 * we return the amount of room that we have for this port (the txCredits) 1357 * otherwise we return a negative error number. 1358 *****************************************************************************/ 1359 static int edge_write_room(struct tty_struct *tty) 1360 { 1361 struct usb_serial_port *port = tty->driver_data; 1362 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1363 int room; 1364 unsigned long flags; 1365 1366 dbg("%s", __func__); 1367 1368 if (edge_port == NULL) 1369 return 0; 1370 if (edge_port->closePending) 1371 return 0; 1372 1373 dbg("%s - port %d", __func__, port->number); 1374 1375 if (!edge_port->open) { 1376 dbg("%s - port not opened", __func__); 1377 return 0; 1378 } 1379 1380 /* total of both buffers is still txCredit */ 1381 spin_lock_irqsave(&edge_port->ep_lock, flags); 1382 room = edge_port->txCredits - edge_port->txfifo.count; 1383 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1384 1385 dbg("%s - returns %d", __func__, room); 1386 return room; 1387 } 1388 1389 1390 /***************************************************************************** 1391 * edge_chars_in_buffer 1392 * this function is called by the tty driver when it wants to know how 1393 * many bytes of data we currently have outstanding in the port (data that 1394 * has been written, but hasn't made it out the port yet) 1395 * If successful, we return the number of bytes left to be written in the 1396 * system, 1397 * Otherwise we return a negative error number. 1398 *****************************************************************************/ 1399 static int edge_chars_in_buffer(struct tty_struct *tty) 1400 { 1401 struct usb_serial_port *port = tty->driver_data; 1402 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1403 int num_chars; 1404 unsigned long flags; 1405 1406 dbg("%s", __func__); 1407 1408 if (edge_port == NULL) 1409 return 0; 1410 if (edge_port->closePending) 1411 return 0; 1412 1413 if (!edge_port->open) { 1414 dbg("%s - port not opened", __func__); 1415 return 0; 1416 } 1417 1418 spin_lock_irqsave(&edge_port->ep_lock, flags); 1419 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1420 edge_port->txfifo.count; 1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1422 if (num_chars) { 1423 dbg("%s(port %d) - returns %d", __func__, 1424 port->number, num_chars); 1425 } 1426 1427 return num_chars; 1428 } 1429 1430 1431 /***************************************************************************** 1432 * SerialThrottle 1433 * this function is called by the tty driver when it wants to stop the data 1434 * being read from the port. 1435 *****************************************************************************/ 1436 static void edge_throttle(struct tty_struct *tty) 1437 { 1438 struct usb_serial_port *port = tty->driver_data; 1439 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1440 int status; 1441 1442 dbg("%s - port %d", __func__, port->number); 1443 1444 if (edge_port == NULL) 1445 return; 1446 1447 if (!edge_port->open) { 1448 dbg("%s - port not opened", __func__); 1449 return; 1450 } 1451 1452 /* if we are implementing XON/XOFF, send the stop character */ 1453 if (I_IXOFF(tty)) { 1454 unsigned char stop_char = STOP_CHAR(tty); 1455 status = edge_write(tty, port, &stop_char, 1); 1456 if (status <= 0) 1457 return; 1458 } 1459 1460 /* if we are implementing RTS/CTS, toggle that line */ 1461 if (tty->termios->c_cflag & CRTSCTS) { 1462 edge_port->shadowMCR &= ~MCR_RTS; 1463 status = send_cmd_write_uart_register(edge_port, MCR, 1464 edge_port->shadowMCR); 1465 if (status != 0) 1466 return; 1467 } 1468 } 1469 1470 1471 /***************************************************************************** 1472 * edge_unthrottle 1473 * this function is called by the tty driver when it wants to resume the 1474 * data being read from the port (called after SerialThrottle is called) 1475 *****************************************************************************/ 1476 static void edge_unthrottle(struct tty_struct *tty) 1477 { 1478 struct usb_serial_port *port = tty->driver_data; 1479 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1480 int status; 1481 1482 dbg("%s - port %d", __func__, port->number); 1483 1484 if (edge_port == NULL) 1485 return; 1486 1487 if (!edge_port->open) { 1488 dbg("%s - port not opened", __func__); 1489 return; 1490 } 1491 1492 /* if we are implementing XON/XOFF, send the start character */ 1493 if (I_IXOFF(tty)) { 1494 unsigned char start_char = START_CHAR(tty); 1495 status = edge_write(tty, port, &start_char, 1); 1496 if (status <= 0) 1497 return; 1498 } 1499 /* if we are implementing RTS/CTS, toggle that line */ 1500 if (tty->termios->c_cflag & CRTSCTS) { 1501 edge_port->shadowMCR |= MCR_RTS; 1502 send_cmd_write_uart_register(edge_port, MCR, 1503 edge_port->shadowMCR); 1504 } 1505 } 1506 1507 1508 /***************************************************************************** 1509 * SerialSetTermios 1510 * this function is called by the tty driver when it wants to change 1511 * the termios structure 1512 *****************************************************************************/ 1513 static void edge_set_termios(struct tty_struct *tty, 1514 struct usb_serial_port *port, struct ktermios *old_termios) 1515 { 1516 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1517 unsigned int cflag; 1518 1519 cflag = tty->termios->c_cflag; 1520 dbg("%s - clfag %08x iflag %08x", __func__, 1521 tty->termios->c_cflag, tty->termios->c_iflag); 1522 dbg("%s - old clfag %08x old iflag %08x", __func__, 1523 old_termios->c_cflag, old_termios->c_iflag); 1524 1525 dbg("%s - port %d", __func__, port->number); 1526 1527 if (edge_port == NULL) 1528 return; 1529 1530 if (!edge_port->open) { 1531 dbg("%s - port not opened", __func__); 1532 return; 1533 } 1534 1535 /* change the port settings to the new ones specified */ 1536 change_port_settings(tty, edge_port, old_termios); 1537 } 1538 1539 1540 /***************************************************************************** 1541 * get_lsr_info - get line status register info 1542 * 1543 * Purpose: Let user call ioctl() to get info when the UART physically 1544 * is emptied. On bus types like RS485, the transmitter must 1545 * release the bus after transmitting. This must be done when 1546 * the transmit shift register is empty, not be done when the 1547 * transmit holding register is empty. This functionality 1548 * allows an RS485 driver to be written in user space. 1549 *****************************************************************************/ 1550 static int get_lsr_info(struct edgeport_port *edge_port, 1551 unsigned int __user *value) 1552 { 1553 unsigned int result = 0; 1554 unsigned long flags; 1555 1556 spin_lock_irqsave(&edge_port->ep_lock, flags); 1557 if (edge_port->maxTxCredits == edge_port->txCredits && 1558 edge_port->txfifo.count == 0) { 1559 dbg("%s -- Empty", __func__); 1560 result = TIOCSER_TEMT; 1561 } 1562 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1563 1564 if (copy_to_user(value, &result, sizeof(int))) 1565 return -EFAULT; 1566 return 0; 1567 } 1568 1569 static int edge_tiocmset(struct tty_struct *tty, 1570 unsigned int set, unsigned int clear) 1571 { 1572 struct usb_serial_port *port = tty->driver_data; 1573 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1574 unsigned int mcr; 1575 1576 dbg("%s - port %d", __func__, port->number); 1577 1578 mcr = edge_port->shadowMCR; 1579 if (set & TIOCM_RTS) 1580 mcr |= MCR_RTS; 1581 if (set & TIOCM_DTR) 1582 mcr |= MCR_DTR; 1583 if (set & TIOCM_LOOP) 1584 mcr |= MCR_LOOPBACK; 1585 1586 if (clear & TIOCM_RTS) 1587 mcr &= ~MCR_RTS; 1588 if (clear & TIOCM_DTR) 1589 mcr &= ~MCR_DTR; 1590 if (clear & TIOCM_LOOP) 1591 mcr &= ~MCR_LOOPBACK; 1592 1593 edge_port->shadowMCR = mcr; 1594 1595 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1596 1597 return 0; 1598 } 1599 1600 static int edge_tiocmget(struct tty_struct *tty) 1601 { 1602 struct usb_serial_port *port = tty->driver_data; 1603 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1604 unsigned int result = 0; 1605 unsigned int msr; 1606 unsigned int mcr; 1607 1608 dbg("%s - port %d", __func__, port->number); 1609 1610 msr = edge_port->shadowMSR; 1611 mcr = edge_port->shadowMCR; 1612 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1613 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1614 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1615 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1616 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1617 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1618 1619 1620 dbg("%s -- %x", __func__, result); 1621 1622 return result; 1623 } 1624 1625 static int edge_get_icount(struct tty_struct *tty, 1626 struct serial_icounter_struct *icount) 1627 { 1628 struct usb_serial_port *port = tty->driver_data; 1629 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1630 struct async_icount cnow; 1631 cnow = edge_port->icount; 1632 1633 icount->cts = cnow.cts; 1634 icount->dsr = cnow.dsr; 1635 icount->rng = cnow.rng; 1636 icount->dcd = cnow.dcd; 1637 icount->rx = cnow.rx; 1638 icount->tx = cnow.tx; 1639 icount->frame = cnow.frame; 1640 icount->overrun = cnow.overrun; 1641 icount->parity = cnow.parity; 1642 icount->brk = cnow.brk; 1643 icount->buf_overrun = cnow.buf_overrun; 1644 1645 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", 1646 __func__, port->number, icount->rx, icount->tx); 1647 return 0; 1648 } 1649 1650 static int get_serial_info(struct edgeport_port *edge_port, 1651 struct serial_struct __user *retinfo) 1652 { 1653 struct serial_struct tmp; 1654 1655 if (!retinfo) 1656 return -EFAULT; 1657 1658 memset(&tmp, 0, sizeof(tmp)); 1659 1660 tmp.type = PORT_16550A; 1661 tmp.line = edge_port->port->serial->minor; 1662 tmp.port = edge_port->port->number; 1663 tmp.irq = 0; 1664 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1665 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1666 tmp.baud_base = 9600; 1667 tmp.close_delay = 5*HZ; 1668 tmp.closing_wait = 30*HZ; 1669 1670 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1671 return -EFAULT; 1672 return 0; 1673 } 1674 1675 1676 /***************************************************************************** 1677 * SerialIoctl 1678 * this function handles any ioctl calls to the driver 1679 *****************************************************************************/ 1680 static int edge_ioctl(struct tty_struct *tty, 1681 unsigned int cmd, unsigned long arg) 1682 { 1683 struct usb_serial_port *port = tty->driver_data; 1684 DEFINE_WAIT(wait); 1685 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1686 struct async_icount cnow; 1687 struct async_icount cprev; 1688 1689 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 1690 1691 switch (cmd) { 1692 case TIOCSERGETLSR: 1693 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 1694 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1695 1696 case TIOCGSERIAL: 1697 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 1698 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1699 1700 case TIOCMIWAIT: 1701 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 1702 cprev = edge_port->icount; 1703 while (1) { 1704 prepare_to_wait(&edge_port->delta_msr_wait, 1705 &wait, TASK_INTERRUPTIBLE); 1706 schedule(); 1707 finish_wait(&edge_port->delta_msr_wait, &wait); 1708 /* see if a signal did it */ 1709 if (signal_pending(current)) 1710 return -ERESTARTSYS; 1711 cnow = edge_port->icount; 1712 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 1713 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 1714 return -EIO; /* no change => error */ 1715 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1716 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1717 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 1718 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 1719 return 0; 1720 } 1721 cprev = cnow; 1722 } 1723 /* NOTREACHED */ 1724 break; 1725 1726 } 1727 return -ENOIOCTLCMD; 1728 } 1729 1730 1731 /***************************************************************************** 1732 * SerialBreak 1733 * this function sends a break to the port 1734 *****************************************************************************/ 1735 static void edge_break(struct tty_struct *tty, int break_state) 1736 { 1737 struct usb_serial_port *port = tty->driver_data; 1738 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1739 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1740 int status; 1741 1742 if ((!edge_serial->is_epic) || 1743 ((edge_serial->is_epic) && 1744 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1745 /* flush and chase */ 1746 edge_port->chaseResponsePending = true; 1747 1748 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__); 1749 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1750 if (status == 0) { 1751 /* block until chase finished */ 1752 block_until_chase_response(edge_port); 1753 } else { 1754 edge_port->chaseResponsePending = false; 1755 } 1756 } 1757 1758 if ((!edge_serial->is_epic) || 1759 ((edge_serial->is_epic) && 1760 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1761 if (break_state == -1) { 1762 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__); 1763 status = send_iosp_ext_cmd(edge_port, 1764 IOSP_CMD_SET_BREAK, 0); 1765 } else { 1766 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__); 1767 status = send_iosp_ext_cmd(edge_port, 1768 IOSP_CMD_CLEAR_BREAK, 0); 1769 } 1770 if (status) 1771 dbg("%s - error sending break set/clear command.", 1772 __func__); 1773 } 1774 } 1775 1776 1777 /***************************************************************************** 1778 * process_rcvd_data 1779 * this function handles the data received on the bulk in pipe. 1780 *****************************************************************************/ 1781 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1782 unsigned char *buffer, __u16 bufferLength) 1783 { 1784 struct usb_serial_port *port; 1785 struct edgeport_port *edge_port; 1786 struct tty_struct *tty; 1787 __u16 lastBufferLength; 1788 __u16 rxLen; 1789 1790 dbg("%s", __func__); 1791 1792 lastBufferLength = bufferLength + 1; 1793 1794 while (bufferLength > 0) { 1795 /* failsafe incase we get a message that we don't understand */ 1796 if (lastBufferLength == bufferLength) { 1797 dbg("%s - stuck in loop, exiting it.", __func__); 1798 break; 1799 } 1800 lastBufferLength = bufferLength; 1801 1802 switch (edge_serial->rxState) { 1803 case EXPECT_HDR1: 1804 edge_serial->rxHeader1 = *buffer; 1805 ++buffer; 1806 --bufferLength; 1807 1808 if (bufferLength == 0) { 1809 edge_serial->rxState = EXPECT_HDR2; 1810 break; 1811 } 1812 /* otherwise, drop on through */ 1813 case EXPECT_HDR2: 1814 edge_serial->rxHeader2 = *buffer; 1815 ++buffer; 1816 --bufferLength; 1817 1818 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, 1819 edge_serial->rxHeader1, edge_serial->rxHeader2); 1820 /* Process depending on whether this header is 1821 * data or status */ 1822 1823 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1824 /* Decode this status header and go to 1825 * EXPECT_HDR1 (if we can process the status 1826 * with only 2 bytes), or go to EXPECT_HDR3 to 1827 * get the third byte. */ 1828 edge_serial->rxPort = 1829 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1830 edge_serial->rxStatusCode = 1831 IOSP_GET_STATUS_CODE( 1832 edge_serial->rxHeader1); 1833 1834 if (!IOSP_STATUS_IS_2BYTE( 1835 edge_serial->rxStatusCode)) { 1836 /* This status needs additional bytes. 1837 * Save what we have and then wait for 1838 * more data. 1839 */ 1840 edge_serial->rxStatusParam 1841 = edge_serial->rxHeader2; 1842 edge_serial->rxState = EXPECT_HDR3; 1843 break; 1844 } 1845 /* We have all the header bytes, process the 1846 status now */ 1847 process_rcvd_status(edge_serial, 1848 edge_serial->rxHeader2, 0); 1849 edge_serial->rxState = EXPECT_HDR1; 1850 break; 1851 } else { 1852 edge_serial->rxPort = 1853 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1854 edge_serial->rxBytesRemaining = 1855 IOSP_GET_HDR_DATA_LEN( 1856 edge_serial->rxHeader1, 1857 edge_serial->rxHeader2); 1858 dbg("%s - Data for Port %u Len %u", 1859 __func__, 1860 edge_serial->rxPort, 1861 edge_serial->rxBytesRemaining); 1862 1863 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1864 * ASSERT(DevExt->RxBytesRemaining < 1865 * IOSP_MAX_DATA_LENGTH); 1866 */ 1867 1868 if (bufferLength == 0) { 1869 edge_serial->rxState = EXPECT_DATA; 1870 break; 1871 } 1872 /* Else, drop through */ 1873 } 1874 case EXPECT_DATA: /* Expect data */ 1875 if (bufferLength < edge_serial->rxBytesRemaining) { 1876 rxLen = bufferLength; 1877 /* Expect data to start next buffer */ 1878 edge_serial->rxState = EXPECT_DATA; 1879 } else { 1880 /* BufLen >= RxBytesRemaining */ 1881 rxLen = edge_serial->rxBytesRemaining; 1882 /* Start another header next time */ 1883 edge_serial->rxState = EXPECT_HDR1; 1884 } 1885 1886 bufferLength -= rxLen; 1887 edge_serial->rxBytesRemaining -= rxLen; 1888 1889 /* spit this data back into the tty driver if this 1890 port is open */ 1891 if (rxLen) { 1892 port = edge_serial->serial->port[ 1893 edge_serial->rxPort]; 1894 edge_port = usb_get_serial_port_data(port); 1895 if (edge_port->open) { 1896 tty = tty_port_tty_get( 1897 &edge_port->port->port); 1898 if (tty) { 1899 dbg("%s - Sending %d bytes to TTY for port %d", 1900 __func__, rxLen, edge_serial->rxPort); 1901 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); 1902 tty_kref_put(tty); 1903 } 1904 edge_port->icount.rx += rxLen; 1905 } 1906 buffer += rxLen; 1907 } 1908 break; 1909 1910 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1911 edge_serial->rxHeader3 = *buffer; 1912 ++buffer; 1913 --bufferLength; 1914 1915 /* We have all the header bytes, process the 1916 status now */ 1917 process_rcvd_status(edge_serial, 1918 edge_serial->rxStatusParam, 1919 edge_serial->rxHeader3); 1920 edge_serial->rxState = EXPECT_HDR1; 1921 break; 1922 } 1923 } 1924 } 1925 1926 1927 /***************************************************************************** 1928 * process_rcvd_status 1929 * this function handles the any status messages received on the 1930 * bulk in pipe. 1931 *****************************************************************************/ 1932 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1933 __u8 byte2, __u8 byte3) 1934 { 1935 struct usb_serial_port *port; 1936 struct edgeport_port *edge_port; 1937 struct tty_struct *tty; 1938 __u8 code = edge_serial->rxStatusCode; 1939 1940 /* switch the port pointer to the one being currently talked about */ 1941 port = edge_serial->serial->port[edge_serial->rxPort]; 1942 edge_port = usb_get_serial_port_data(port); 1943 if (edge_port == NULL) { 1944 dev_err(&edge_serial->serial->dev->dev, 1945 "%s - edge_port == NULL for port %d\n", 1946 __func__, edge_serial->rxPort); 1947 return; 1948 } 1949 1950 dbg("%s - port %d", __func__, edge_serial->rxPort); 1951 1952 if (code == IOSP_EXT_STATUS) { 1953 switch (byte2) { 1954 case IOSP_EXT_STATUS_CHASE_RSP: 1955 /* we want to do EXT status regardless of port 1956 * open/closed */ 1957 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", 1958 __func__, edge_serial->rxPort, byte3); 1959 /* Currently, the only EXT_STATUS is Chase, so process 1960 * here instead of one more call to one more subroutine 1961 * If/when more EXT_STATUS, there'll be more work to do 1962 * Also, we currently clear flag and close the port 1963 * regardless of content of above's Byte3. 1964 * We could choose to do something else when Byte3 says 1965 * Timeout on Chase from Edgeport, like wait longer in 1966 * block_until_chase_response, but for now we don't. 1967 */ 1968 edge_port->chaseResponsePending = false; 1969 wake_up(&edge_port->wait_chase); 1970 return; 1971 1972 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1973 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3); 1974 /* Port->RxCheckRsp = true; */ 1975 return; 1976 } 1977 } 1978 1979 if (code == IOSP_STATUS_OPEN_RSP) { 1980 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1981 edge_port->maxTxCredits = edge_port->txCredits; 1982 dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 1983 handle_new_msr(edge_port, byte2); 1984 1985 /* send the current line settings to the port so we are 1986 in sync with any further termios calls */ 1987 tty = tty_port_tty_get(&edge_port->port->port); 1988 if (tty) { 1989 change_port_settings(tty, 1990 edge_port, tty->termios); 1991 tty_kref_put(tty); 1992 } 1993 1994 /* we have completed the open */ 1995 edge_port->openPending = false; 1996 edge_port->open = true; 1997 wake_up(&edge_port->wait_open); 1998 return; 1999 } 2000 2001 /* If port is closed, silently discard all rcvd status. We can 2002 * have cases where buffered status is received AFTER the close 2003 * port command is sent to the Edgeport. 2004 */ 2005 if (!edge_port->open || edge_port->closePending) 2006 return; 2007 2008 switch (code) { 2009 /* Not currently sent by Edgeport */ 2010 case IOSP_STATUS_LSR: 2011 dbg("%s - Port %u LSR Status = %02x", 2012 __func__, edge_serial->rxPort, byte2); 2013 handle_new_lsr(edge_port, false, byte2, 0); 2014 break; 2015 2016 case IOSP_STATUS_LSR_DATA: 2017 dbg("%s - Port %u LSR Status = %02x, Data = %02x", 2018 __func__, edge_serial->rxPort, byte2, byte3); 2019 /* byte2 is LSR Register */ 2020 /* byte3 is broken data byte */ 2021 handle_new_lsr(edge_port, true, byte2, byte3); 2022 break; 2023 /* 2024 * case IOSP_EXT_4_STATUS: 2025 * dbg("%s - Port %u LSR Status = %02x Data = %02x", 2026 * __func__, edge_serial->rxPort, byte2, byte3); 2027 * break; 2028 */ 2029 case IOSP_STATUS_MSR: 2030 dbg("%s - Port %u MSR Status = %02x", 2031 __func__, edge_serial->rxPort, byte2); 2032 /* 2033 * Process this new modem status and generate appropriate 2034 * events, etc, based on the new status. This routine 2035 * also saves the MSR in Port->ShadowMsr. 2036 */ 2037 handle_new_msr(edge_port, byte2); 2038 break; 2039 2040 default: 2041 dbg("%s - Unrecognized IOSP status code %u", __func__, code); 2042 break; 2043 } 2044 } 2045 2046 2047 /***************************************************************************** 2048 * edge_tty_recv 2049 * this function passes data on to the tty flip buffer 2050 *****************************************************************************/ 2051 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 2052 unsigned char *data, int length) 2053 { 2054 int cnt; 2055 2056 cnt = tty_insert_flip_string(tty, data, length); 2057 if (cnt < length) { 2058 dev_err(dev, "%s - dropping data, %d bytes lost\n", 2059 __func__, length - cnt); 2060 } 2061 data += cnt; 2062 length -= cnt; 2063 2064 tty_flip_buffer_push(tty); 2065 } 2066 2067 2068 /***************************************************************************** 2069 * handle_new_msr 2070 * this function handles any change to the msr register for a port. 2071 *****************************************************************************/ 2072 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2073 { 2074 struct async_icount *icount; 2075 2076 dbg("%s %02x", __func__, newMsr); 2077 2078 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2079 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2080 icount = &edge_port->icount; 2081 2082 /* update input line counters */ 2083 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2084 icount->cts++; 2085 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2086 icount->dsr++; 2087 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2088 icount->dcd++; 2089 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2090 icount->rng++; 2091 wake_up_interruptible(&edge_port->delta_msr_wait); 2092 } 2093 2094 /* Save the new modem status */ 2095 edge_port->shadowMSR = newMsr & 0xf0; 2096 } 2097 2098 2099 /***************************************************************************** 2100 * handle_new_lsr 2101 * this function handles any change to the lsr register for a port. 2102 *****************************************************************************/ 2103 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2104 __u8 lsr, __u8 data) 2105 { 2106 __u8 newLsr = (__u8) (lsr & (__u8) 2107 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2108 struct async_icount *icount; 2109 2110 dbg("%s - %02x", __func__, newLsr); 2111 2112 edge_port->shadowLSR = lsr; 2113 2114 if (newLsr & LSR_BREAK) { 2115 /* 2116 * Parity and Framing errors only count if they 2117 * occur exclusive of a break being 2118 * received. 2119 */ 2120 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2121 } 2122 2123 /* Place LSR data byte into Rx buffer */ 2124 if (lsrData) { 2125 struct tty_struct *tty = 2126 tty_port_tty_get(&edge_port->port->port); 2127 if (tty) { 2128 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 2129 tty_kref_put(tty); 2130 } 2131 } 2132 /* update input line counters */ 2133 icount = &edge_port->icount; 2134 if (newLsr & LSR_BREAK) 2135 icount->brk++; 2136 if (newLsr & LSR_OVER_ERR) 2137 icount->overrun++; 2138 if (newLsr & LSR_PAR_ERR) 2139 icount->parity++; 2140 if (newLsr & LSR_FRM_ERR) 2141 icount->frame++; 2142 } 2143 2144 2145 /**************************************************************************** 2146 * sram_write 2147 * writes a number of bytes to the Edgeport device's sram starting at the 2148 * given address. 2149 * If successful returns the number of bytes written, otherwise it returns 2150 * a negative error number of the problem. 2151 ****************************************************************************/ 2152 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2153 __u16 length, const __u8 *data) 2154 { 2155 int result; 2156 __u16 current_length; 2157 unsigned char *transfer_buffer; 2158 2159 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2160 2161 transfer_buffer = kmalloc(64, GFP_KERNEL); 2162 if (!transfer_buffer) { 2163 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2164 __func__, 64); 2165 return -ENOMEM; 2166 } 2167 2168 /* need to split these writes up into 64 byte chunks */ 2169 result = 0; 2170 while (length > 0) { 2171 if (length > 64) 2172 current_length = 64; 2173 else 2174 current_length = length; 2175 2176 /* dbg("%s - writing %x, %x, %d", __func__, 2177 extAddr, addr, current_length); */ 2178 memcpy(transfer_buffer, data, current_length); 2179 result = usb_control_msg(serial->dev, 2180 usb_sndctrlpipe(serial->dev, 0), 2181 USB_REQUEST_ION_WRITE_RAM, 2182 0x40, addr, extAddr, transfer_buffer, 2183 current_length, 300); 2184 if (result < 0) 2185 break; 2186 length -= current_length; 2187 addr += current_length; 2188 data += current_length; 2189 } 2190 2191 kfree(transfer_buffer); 2192 return result; 2193 } 2194 2195 2196 /**************************************************************************** 2197 * rom_write 2198 * writes a number of bytes to the Edgeport device's ROM starting at the 2199 * given address. 2200 * If successful returns the number of bytes written, otherwise it returns 2201 * a negative error number of the problem. 2202 ****************************************************************************/ 2203 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2204 __u16 length, const __u8 *data) 2205 { 2206 int result; 2207 __u16 current_length; 2208 unsigned char *transfer_buffer; 2209 2210 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */ 2211 2212 transfer_buffer = kmalloc(64, GFP_KERNEL); 2213 if (!transfer_buffer) { 2214 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2215 __func__, 64); 2216 return -ENOMEM; 2217 } 2218 2219 /* need to split these writes up into 64 byte chunks */ 2220 result = 0; 2221 while (length > 0) { 2222 if (length > 64) 2223 current_length = 64; 2224 else 2225 current_length = length; 2226 /* dbg("%s - writing %x, %x, %d", __func__, 2227 extAddr, addr, current_length); */ 2228 memcpy(transfer_buffer, data, current_length); 2229 result = usb_control_msg(serial->dev, 2230 usb_sndctrlpipe(serial->dev, 0), 2231 USB_REQUEST_ION_WRITE_ROM, 0x40, 2232 addr, extAddr, 2233 transfer_buffer, current_length, 300); 2234 if (result < 0) 2235 break; 2236 length -= current_length; 2237 addr += current_length; 2238 data += current_length; 2239 } 2240 2241 kfree(transfer_buffer); 2242 return result; 2243 } 2244 2245 2246 /**************************************************************************** 2247 * rom_read 2248 * reads a number of bytes from the Edgeport device starting at the given 2249 * address. 2250 * If successful returns the number of bytes read, otherwise it returns 2251 * a negative error number of the problem. 2252 ****************************************************************************/ 2253 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2254 __u16 addr, __u16 length, __u8 *data) 2255 { 2256 int result; 2257 __u16 current_length; 2258 unsigned char *transfer_buffer; 2259 2260 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); 2261 2262 transfer_buffer = kmalloc(64, GFP_KERNEL); 2263 if (!transfer_buffer) { 2264 dev_err(&serial->dev->dev, 2265 "%s - kmalloc(%d) failed.\n", __func__, 64); 2266 return -ENOMEM; 2267 } 2268 2269 /* need to split these reads up into 64 byte chunks */ 2270 result = 0; 2271 while (length > 0) { 2272 if (length > 64) 2273 current_length = 64; 2274 else 2275 current_length = length; 2276 /* dbg("%s - %x, %x, %d", __func__, 2277 extAddr, addr, current_length); */ 2278 result = usb_control_msg(serial->dev, 2279 usb_rcvctrlpipe(serial->dev, 0), 2280 USB_REQUEST_ION_READ_ROM, 2281 0xC0, addr, extAddr, transfer_buffer, 2282 current_length, 300); 2283 if (result < 0) 2284 break; 2285 memcpy(data, transfer_buffer, current_length); 2286 length -= current_length; 2287 addr += current_length; 2288 data += current_length; 2289 } 2290 2291 kfree(transfer_buffer); 2292 return result; 2293 } 2294 2295 2296 /**************************************************************************** 2297 * send_iosp_ext_cmd 2298 * Is used to send a IOSP message to the Edgeport device 2299 ****************************************************************************/ 2300 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2301 __u8 command, __u8 param) 2302 { 2303 unsigned char *buffer; 2304 unsigned char *currentCommand; 2305 int length = 0; 2306 int status = 0; 2307 2308 dbg("%s - %d, %d", __func__, command, param); 2309 2310 buffer = kmalloc(10, GFP_ATOMIC); 2311 if (!buffer) { 2312 dev_err(&edge_port->port->dev, 2313 "%s - kmalloc(%d) failed.\n", __func__, 10); 2314 return -ENOMEM; 2315 } 2316 2317 currentCommand = buffer; 2318 2319 MAKE_CMD_EXT_CMD(¤tCommand, &length, 2320 edge_port->port->number - edge_port->port->serial->minor, 2321 command, param); 2322 2323 status = write_cmd_usb(edge_port, buffer, length); 2324 if (status) { 2325 /* something bad happened, let's free up the memory */ 2326 kfree(buffer); 2327 } 2328 2329 return status; 2330 } 2331 2332 2333 /***************************************************************************** 2334 * write_cmd_usb 2335 * this function writes the given buffer out to the bulk write endpoint. 2336 *****************************************************************************/ 2337 static int write_cmd_usb(struct edgeport_port *edge_port, 2338 unsigned char *buffer, int length) 2339 { 2340 struct edgeport_serial *edge_serial = 2341 usb_get_serial_data(edge_port->port->serial); 2342 int status = 0; 2343 struct urb *urb; 2344 2345 usb_serial_debug_data(debug, &edge_port->port->dev, 2346 __func__, length, buffer); 2347 2348 /* Allocate our next urb */ 2349 urb = usb_alloc_urb(0, GFP_ATOMIC); 2350 if (!urb) 2351 return -ENOMEM; 2352 2353 atomic_inc(&CmdUrbs); 2354 dbg("%s - ALLOCATE URB %p (outstanding %d)", 2355 __func__, urb, atomic_read(&CmdUrbs)); 2356 2357 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2358 usb_sndbulkpipe(edge_serial->serial->dev, 2359 edge_serial->bulk_out_endpoint), 2360 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2361 2362 edge_port->commandPending = true; 2363 status = usb_submit_urb(urb, GFP_ATOMIC); 2364 2365 if (status) { 2366 /* something went wrong */ 2367 dev_err(&edge_port->port->dev, 2368 "%s - usb_submit_urb(write command) failed, status = %d\n", 2369 __func__, status); 2370 usb_kill_urb(urb); 2371 usb_free_urb(urb); 2372 atomic_dec(&CmdUrbs); 2373 return status; 2374 } 2375 2376 #if 0 2377 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2378 2379 if (edge_port->commandPending) { 2380 /* command timed out */ 2381 dbg("%s - command timed out", __func__); 2382 status = -EINVAL; 2383 } 2384 #endif 2385 return status; 2386 } 2387 2388 2389 /***************************************************************************** 2390 * send_cmd_write_baud_rate 2391 * this function sends the proper command to change the baud rate of the 2392 * specified port. 2393 *****************************************************************************/ 2394 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2395 int baudRate) 2396 { 2397 struct edgeport_serial *edge_serial = 2398 usb_get_serial_data(edge_port->port->serial); 2399 unsigned char *cmdBuffer; 2400 unsigned char *currCmd; 2401 int cmdLen = 0; 2402 int divisor; 2403 int status; 2404 unsigned char number = 2405 edge_port->port->number - edge_port->port->serial->minor; 2406 2407 if (edge_serial->is_epic && 2408 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2409 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d", 2410 edge_port->port->number, baudRate); 2411 return 0; 2412 } 2413 2414 dbg("%s - port = %d, baud = %d", __func__, 2415 edge_port->port->number, baudRate); 2416 2417 status = calc_baud_rate_divisor(baudRate, &divisor); 2418 if (status) { 2419 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", 2420 __func__); 2421 return status; 2422 } 2423 2424 /* Alloc memory for the string of commands. */ 2425 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2426 if (!cmdBuffer) { 2427 dev_err(&edge_port->port->dev, 2428 "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2429 return -ENOMEM; 2430 } 2431 currCmd = cmdBuffer; 2432 2433 /* Enable access to divisor latch */ 2434 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2435 2436 /* Write the divisor itself */ 2437 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2438 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2439 2440 /* Restore original value to disable access to divisor latch */ 2441 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2442 edge_port->shadowLCR); 2443 2444 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2445 if (status) { 2446 /* something bad happened, let's free up the memory */ 2447 kfree(cmdBuffer); 2448 } 2449 2450 return status; 2451 } 2452 2453 2454 /***************************************************************************** 2455 * calc_baud_rate_divisor 2456 * this function calculates the proper baud rate divisor for the specified 2457 * baud rate. 2458 *****************************************************************************/ 2459 static int calc_baud_rate_divisor(int baudrate, int *divisor) 2460 { 2461 int i; 2462 __u16 custom; 2463 2464 2465 dbg("%s - %d", __func__, baudrate); 2466 2467 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2468 if (divisor_table[i].BaudRate == baudrate) { 2469 *divisor = divisor_table[i].Divisor; 2470 return 0; 2471 } 2472 } 2473 2474 /* We have tried all of the standard baud rates 2475 * lets try to calculate the divisor for this baud rate 2476 * Make sure the baud rate is reasonable */ 2477 if (baudrate > 50 && baudrate < 230400) { 2478 /* get divisor */ 2479 custom = (__u16)((230400L + baudrate/2) / baudrate); 2480 2481 *divisor = custom; 2482 2483 dbg("%s - Baud %d = %d", __func__, baudrate, custom); 2484 return 0; 2485 } 2486 2487 return -1; 2488 } 2489 2490 2491 /***************************************************************************** 2492 * send_cmd_write_uart_register 2493 * this function builds up a uart register message and sends to the device. 2494 *****************************************************************************/ 2495 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2496 __u8 regNum, __u8 regValue) 2497 { 2498 struct edgeport_serial *edge_serial = 2499 usb_get_serial_data(edge_port->port->serial); 2500 unsigned char *cmdBuffer; 2501 unsigned char *currCmd; 2502 unsigned long cmdLen = 0; 2503 int status; 2504 2505 dbg("%s - write to %s register 0x%02x", 2506 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2507 2508 if (edge_serial->is_epic && 2509 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2510 regNum == MCR) { 2511 dbg("SendCmdWriteUartReg - Not writing to MCR Register"); 2512 return 0; 2513 } 2514 2515 if (edge_serial->is_epic && 2516 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2517 regNum == LCR) { 2518 dbg("SendCmdWriteUartReg - Not writing to LCR Register"); 2519 return 0; 2520 } 2521 2522 /* Alloc memory for the string of commands. */ 2523 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2524 if (cmdBuffer == NULL) 2525 return -ENOMEM; 2526 2527 currCmd = cmdBuffer; 2528 2529 /* Build a cmd in the buffer to write the given register */ 2530 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, 2531 edge_port->port->number - edge_port->port->serial->minor, 2532 regNum, regValue); 2533 2534 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2535 if (status) { 2536 /* something bad happened, let's free up the memory */ 2537 kfree(cmdBuffer); 2538 } 2539 2540 return status; 2541 } 2542 2543 2544 /***************************************************************************** 2545 * change_port_settings 2546 * This routine is called to set the UART on the device to match the 2547 * specified new settings. 2548 *****************************************************************************/ 2549 2550 static void change_port_settings(struct tty_struct *tty, 2551 struct edgeport_port *edge_port, struct ktermios *old_termios) 2552 { 2553 struct edgeport_serial *edge_serial = 2554 usb_get_serial_data(edge_port->port->serial); 2555 int baud; 2556 unsigned cflag; 2557 __u8 mask = 0xff; 2558 __u8 lData; 2559 __u8 lParity; 2560 __u8 lStop; 2561 __u8 rxFlow; 2562 __u8 txFlow; 2563 int status; 2564 2565 dbg("%s - port %d", __func__, edge_port->port->number); 2566 2567 if (!edge_port->open && 2568 !edge_port->openPending) { 2569 dbg("%s - port not opened", __func__); 2570 return; 2571 } 2572 2573 cflag = tty->termios->c_cflag; 2574 2575 switch (cflag & CSIZE) { 2576 case CS5: 2577 lData = LCR_BITS_5; mask = 0x1f; 2578 dbg("%s - data bits = 5", __func__); 2579 break; 2580 case CS6: 2581 lData = LCR_BITS_6; mask = 0x3f; 2582 dbg("%s - data bits = 6", __func__); 2583 break; 2584 case CS7: 2585 lData = LCR_BITS_7; mask = 0x7f; 2586 dbg("%s - data bits = 7", __func__); 2587 break; 2588 default: 2589 case CS8: 2590 lData = LCR_BITS_8; 2591 dbg("%s - data bits = 8", __func__); 2592 break; 2593 } 2594 2595 lParity = LCR_PAR_NONE; 2596 if (cflag & PARENB) { 2597 if (cflag & CMSPAR) { 2598 if (cflag & PARODD) { 2599 lParity = LCR_PAR_MARK; 2600 dbg("%s - parity = mark", __func__); 2601 } else { 2602 lParity = LCR_PAR_SPACE; 2603 dbg("%s - parity = space", __func__); 2604 } 2605 } else if (cflag & PARODD) { 2606 lParity = LCR_PAR_ODD; 2607 dbg("%s - parity = odd", __func__); 2608 } else { 2609 lParity = LCR_PAR_EVEN; 2610 dbg("%s - parity = even", __func__); 2611 } 2612 } else { 2613 dbg("%s - parity = none", __func__); 2614 } 2615 2616 if (cflag & CSTOPB) { 2617 lStop = LCR_STOP_2; 2618 dbg("%s - stop bits = 2", __func__); 2619 } else { 2620 lStop = LCR_STOP_1; 2621 dbg("%s - stop bits = 1", __func__); 2622 } 2623 2624 /* figure out the flow control settings */ 2625 rxFlow = txFlow = 0x00; 2626 if (cflag & CRTSCTS) { 2627 rxFlow |= IOSP_RX_FLOW_RTS; 2628 txFlow |= IOSP_TX_FLOW_CTS; 2629 dbg("%s - RTS/CTS is enabled", __func__); 2630 } else { 2631 dbg("%s - RTS/CTS is disabled", __func__); 2632 } 2633 2634 /* if we are implementing XON/XOFF, set the start and stop character 2635 in the device */ 2636 if (I_IXOFF(tty) || I_IXON(tty)) { 2637 unsigned char stop_char = STOP_CHAR(tty); 2638 unsigned char start_char = START_CHAR(tty); 2639 2640 if ((!edge_serial->is_epic) || 2641 ((edge_serial->is_epic) && 2642 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2643 send_iosp_ext_cmd(edge_port, 2644 IOSP_CMD_SET_XON_CHAR, start_char); 2645 send_iosp_ext_cmd(edge_port, 2646 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2647 } 2648 2649 /* if we are implementing INBOUND XON/XOFF */ 2650 if (I_IXOFF(tty)) { 2651 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2652 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2653 __func__, start_char, stop_char); 2654 } else { 2655 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2656 } 2657 2658 /* if we are implementing OUTBOUND XON/XOFF */ 2659 if (I_IXON(tty)) { 2660 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2661 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2662 __func__, start_char, stop_char); 2663 } else { 2664 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2665 } 2666 } 2667 2668 /* Set flow control to the configured value */ 2669 if ((!edge_serial->is_epic) || 2670 ((edge_serial->is_epic) && 2671 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2672 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2673 if ((!edge_serial->is_epic) || 2674 ((edge_serial->is_epic) && 2675 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2676 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2677 2678 2679 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2680 edge_port->shadowLCR |= (lData | lParity | lStop); 2681 2682 edge_port->validDataMask = mask; 2683 2684 /* Send the updated LCR value to the EdgePort */ 2685 status = send_cmd_write_uart_register(edge_port, LCR, 2686 edge_port->shadowLCR); 2687 if (status != 0) 2688 return; 2689 2690 /* set up the MCR register and send it to the EdgePort */ 2691 edge_port->shadowMCR = MCR_MASTER_IE; 2692 if (cflag & CBAUD) 2693 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2694 2695 status = send_cmd_write_uart_register(edge_port, MCR, 2696 edge_port->shadowMCR); 2697 if (status != 0) 2698 return; 2699 2700 /* Determine divisor based on baud rate */ 2701 baud = tty_get_baud_rate(tty); 2702 if (!baud) { 2703 /* pick a default, any default... */ 2704 baud = 9600; 2705 } 2706 2707 dbg("%s - baud rate = %d", __func__, baud); 2708 status = send_cmd_write_baud_rate(edge_port, baud); 2709 if (status == -1) { 2710 /* Speed change was not possible - put back the old speed */ 2711 baud = tty_termios_baud_rate(old_termios); 2712 tty_encode_baud_rate(tty, baud, baud); 2713 } 2714 } 2715 2716 2717 /**************************************************************************** 2718 * unicode_to_ascii 2719 * Turns a string from Unicode into ASCII. 2720 * Doesn't do a good job with any characters that are outside the normal 2721 * ASCII range, but it's only for debugging... 2722 * NOTE: expects the unicode in LE format 2723 ****************************************************************************/ 2724 static void unicode_to_ascii(char *string, int buflen, 2725 __le16 *unicode, int unicode_size) 2726 { 2727 int i; 2728 2729 if (buflen <= 0) /* never happens, but... */ 2730 return; 2731 --buflen; /* space for nul */ 2732 2733 for (i = 0; i < unicode_size; i++) { 2734 if (i >= buflen) 2735 break; 2736 string[i] = (char)(le16_to_cpu(unicode[i])); 2737 } 2738 string[i] = 0x00; 2739 } 2740 2741 2742 /**************************************************************************** 2743 * get_manufacturing_desc 2744 * reads in the manufacturing descriptor and stores it into the serial 2745 * structure. 2746 ****************************************************************************/ 2747 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2748 { 2749 int response; 2750 2751 dbg("getting manufacturer descriptor"); 2752 2753 response = rom_read(edge_serial->serial, 2754 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2755 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2756 EDGE_MANUF_DESC_LEN, 2757 (__u8 *)(&edge_serial->manuf_descriptor)); 2758 2759 if (response < 1) 2760 dev_err(&edge_serial->serial->dev->dev, 2761 "error in getting manufacturer descriptor\n"); 2762 else { 2763 char string[30]; 2764 dbg("**Manufacturer Descriptor"); 2765 dbg(" RomSize: %dK", 2766 edge_serial->manuf_descriptor.RomSize); 2767 dbg(" RamSize: %dK", 2768 edge_serial->manuf_descriptor.RamSize); 2769 dbg(" CpuRev: %d", 2770 edge_serial->manuf_descriptor.CpuRev); 2771 dbg(" BoardRev: %d", 2772 edge_serial->manuf_descriptor.BoardRev); 2773 dbg(" NumPorts: %d", 2774 edge_serial->manuf_descriptor.NumPorts); 2775 dbg(" DescDate: %d/%d/%d", 2776 edge_serial->manuf_descriptor.DescDate[0], 2777 edge_serial->manuf_descriptor.DescDate[1], 2778 edge_serial->manuf_descriptor.DescDate[2]+1900); 2779 unicode_to_ascii(string, sizeof(string), 2780 edge_serial->manuf_descriptor.SerialNumber, 2781 edge_serial->manuf_descriptor.SerNumLength/2); 2782 dbg(" SerialNumber: %s", string); 2783 unicode_to_ascii(string, sizeof(string), 2784 edge_serial->manuf_descriptor.AssemblyNumber, 2785 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2786 dbg(" AssemblyNumber: %s", string); 2787 unicode_to_ascii(string, sizeof(string), 2788 edge_serial->manuf_descriptor.OemAssyNumber, 2789 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2790 dbg(" OemAssyNumber: %s", string); 2791 dbg(" UartType: %d", 2792 edge_serial->manuf_descriptor.UartType); 2793 dbg(" IonPid: %d", 2794 edge_serial->manuf_descriptor.IonPid); 2795 dbg(" IonConfig: %d", 2796 edge_serial->manuf_descriptor.IonConfig); 2797 } 2798 } 2799 2800 2801 /**************************************************************************** 2802 * get_boot_desc 2803 * reads in the bootloader descriptor and stores it into the serial 2804 * structure. 2805 ****************************************************************************/ 2806 static void get_boot_desc(struct edgeport_serial *edge_serial) 2807 { 2808 int response; 2809 2810 dbg("getting boot descriptor"); 2811 2812 response = rom_read(edge_serial->serial, 2813 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2814 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2815 EDGE_BOOT_DESC_LEN, 2816 (__u8 *)(&edge_serial->boot_descriptor)); 2817 2818 if (response < 1) 2819 dev_err(&edge_serial->serial->dev->dev, 2820 "error in getting boot descriptor\n"); 2821 else { 2822 dbg("**Boot Descriptor:"); 2823 dbg(" BootCodeLength: %d", 2824 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2825 dbg(" MajorVersion: %d", 2826 edge_serial->boot_descriptor.MajorVersion); 2827 dbg(" MinorVersion: %d", 2828 edge_serial->boot_descriptor.MinorVersion); 2829 dbg(" BuildNumber: %d", 2830 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2831 dbg(" Capabilities: 0x%x", 2832 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2833 dbg(" UConfig0: %d", 2834 edge_serial->boot_descriptor.UConfig0); 2835 dbg(" UConfig1: %d", 2836 edge_serial->boot_descriptor.UConfig1); 2837 } 2838 } 2839 2840 2841 /**************************************************************************** 2842 * load_application_firmware 2843 * This is called to load the application firmware to the device 2844 ****************************************************************************/ 2845 static void load_application_firmware(struct edgeport_serial *edge_serial) 2846 { 2847 const struct ihex_binrec *rec; 2848 const struct firmware *fw; 2849 const char *fw_name; 2850 const char *fw_info; 2851 int response; 2852 __u32 Operaddr; 2853 __u16 build; 2854 2855 switch (edge_serial->product_info.iDownloadFile) { 2856 case EDGE_DOWNLOAD_FILE_I930: 2857 fw_info = "downloading firmware version (930)"; 2858 fw_name = "edgeport/down.fw"; 2859 break; 2860 2861 case EDGE_DOWNLOAD_FILE_80251: 2862 fw_info = "downloading firmware version (80251)"; 2863 fw_name = "edgeport/down2.fw"; 2864 break; 2865 2866 case EDGE_DOWNLOAD_FILE_NONE: 2867 dbg("No download file specified, skipping download"); 2868 return; 2869 2870 default: 2871 return; 2872 } 2873 2874 response = request_ihex_firmware(&fw, fw_name, 2875 &edge_serial->serial->dev->dev); 2876 if (response) { 2877 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 2878 fw_name, response); 2879 return; 2880 } 2881 2882 rec = (const struct ihex_binrec *)fw->data; 2883 build = (rec->data[2] << 8) | rec->data[3]; 2884 2885 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build); 2886 2887 edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; 2888 edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; 2889 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2890 2891 for (rec = ihex_next_binrec(rec); rec; 2892 rec = ihex_next_binrec(rec)) { 2893 Operaddr = be32_to_cpu(rec->addr); 2894 response = sram_write(edge_serial->serial, 2895 Operaddr >> 16, 2896 Operaddr & 0xFFFF, 2897 be16_to_cpu(rec->len), 2898 &rec->data[0]); 2899 if (response < 0) { 2900 dev_err(&edge_serial->serial->dev->dev, 2901 "sram_write failed (%x, %x, %d)\n", 2902 Operaddr >> 16, Operaddr & 0xFFFF, 2903 be16_to_cpu(rec->len)); 2904 break; 2905 } 2906 } 2907 2908 dbg("sending exec_dl_code"); 2909 response = usb_control_msg (edge_serial->serial->dev, 2910 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2911 USB_REQUEST_ION_EXEC_DL_CODE, 2912 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2913 2914 release_firmware(fw); 2915 } 2916 2917 2918 /**************************************************************************** 2919 * edge_startup 2920 ****************************************************************************/ 2921 static int edge_startup(struct usb_serial *serial) 2922 { 2923 struct edgeport_serial *edge_serial; 2924 struct edgeport_port *edge_port; 2925 struct usb_device *dev; 2926 int i, j; 2927 int response; 2928 bool interrupt_in_found; 2929 bool bulk_in_found; 2930 bool bulk_out_found; 2931 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2932 EDGE_COMPATIBILITY_MASK1, 2933 EDGE_COMPATIBILITY_MASK2 }; 2934 2935 dev = serial->dev; 2936 2937 /* create our private serial structure */ 2938 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2939 if (edge_serial == NULL) { 2940 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2941 return -ENOMEM; 2942 } 2943 spin_lock_init(&edge_serial->es_lock); 2944 edge_serial->serial = serial; 2945 usb_set_serial_data(serial, edge_serial); 2946 2947 /* get the name for the device from the device */ 2948 i = usb_string(dev, dev->descriptor.iManufacturer, 2949 &edge_serial->name[0], MAX_NAME_LEN+1); 2950 if (i < 0) 2951 i = 0; 2952 edge_serial->name[i++] = ' '; 2953 usb_string(dev, dev->descriptor.iProduct, 2954 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2955 2956 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2957 2958 /* Read the epic descriptor */ 2959 if (get_epic_descriptor(edge_serial) <= 0) { 2960 /* memcpy descriptor to Supports structures */ 2961 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2962 sizeof(struct edge_compatibility_bits)); 2963 2964 /* get the manufacturing descriptor for this device */ 2965 get_manufacturing_desc(edge_serial); 2966 2967 /* get the boot descriptor */ 2968 get_boot_desc(edge_serial); 2969 2970 get_product_info(edge_serial); 2971 } 2972 2973 /* set the number of ports from the manufacturing description */ 2974 /* serial->num_ports = serial->product_info.NumPorts; */ 2975 if ((!edge_serial->is_epic) && 2976 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2977 dev_warn(&serial->dev->dev, "Device Reported %d serial ports " 2978 "vs. core thinking we have %d ports, email " 2979 "greg@kroah.com this information.\n", 2980 edge_serial->product_info.NumPorts, 2981 serial->num_ports); 2982 } 2983 2984 dbg("%s - time 1 %ld", __func__, jiffies); 2985 2986 /* If not an EPiC device */ 2987 if (!edge_serial->is_epic) { 2988 /* now load the application firmware into this device */ 2989 load_application_firmware(edge_serial); 2990 2991 dbg("%s - time 2 %ld", __func__, jiffies); 2992 2993 /* Check current Edgeport EEPROM and update if necessary */ 2994 update_edgeport_E2PROM(edge_serial); 2995 2996 dbg("%s - time 3 %ld", __func__, jiffies); 2997 2998 /* set the configuration to use #1 */ 2999 /* dbg("set_configuration 1"); */ 3000 /* usb_set_configuration (dev, 1); */ 3001 } 3002 dbg(" FirmwareMajorVersion %d.%d.%d", 3003 edge_serial->product_info.FirmwareMajorVersion, 3004 edge_serial->product_info.FirmwareMinorVersion, 3005 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 3006 3007 /* we set up the pointers to the endpoints in the edge_open function, 3008 * as the structures aren't created yet. */ 3009 3010 /* set up our port private structures */ 3011 for (i = 0; i < serial->num_ports; ++i) { 3012 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); 3013 if (edge_port == NULL) { 3014 dev_err(&serial->dev->dev, "%s - Out of memory\n", 3015 __func__); 3016 for (j = 0; j < i; ++j) { 3017 kfree(usb_get_serial_port_data(serial->port[j])); 3018 usb_set_serial_port_data(serial->port[j], 3019 NULL); 3020 } 3021 usb_set_serial_data(serial, NULL); 3022 kfree(edge_serial); 3023 return -ENOMEM; 3024 } 3025 spin_lock_init(&edge_port->ep_lock); 3026 edge_port->port = serial->port[i]; 3027 usb_set_serial_port_data(serial->port[i], edge_port); 3028 } 3029 3030 response = 0; 3031 3032 if (edge_serial->is_epic) { 3033 /* EPIC thing, set up our interrupt polling now and our read 3034 * urb, so that the device knows it really is connected. */ 3035 interrupt_in_found = bulk_in_found = bulk_out_found = false; 3036 for (i = 0; i < serial->interface->altsetting[0] 3037 .desc.bNumEndpoints; ++i) { 3038 struct usb_endpoint_descriptor *endpoint; 3039 int buffer_size; 3040 3041 endpoint = &serial->interface->altsetting[0]. 3042 endpoint[i].desc; 3043 buffer_size = usb_endpoint_maxp(endpoint); 3044 if (!interrupt_in_found && 3045 (usb_endpoint_is_int_in(endpoint))) { 3046 /* we found a interrupt in endpoint */ 3047 dbg("found interrupt in"); 3048 3049 /* not set up yet, so do it now */ 3050 edge_serial->interrupt_read_urb = 3051 usb_alloc_urb(0, GFP_KERNEL); 3052 if (!edge_serial->interrupt_read_urb) { 3053 dev_err(&dev->dev, "out of memory\n"); 3054 return -ENOMEM; 3055 } 3056 edge_serial->interrupt_in_buffer = 3057 kmalloc(buffer_size, GFP_KERNEL); 3058 if (!edge_serial->interrupt_in_buffer) { 3059 dev_err(&dev->dev, "out of memory\n"); 3060 usb_free_urb(edge_serial->interrupt_read_urb); 3061 return -ENOMEM; 3062 } 3063 edge_serial->interrupt_in_endpoint = 3064 endpoint->bEndpointAddress; 3065 3066 /* set up our interrupt urb */ 3067 usb_fill_int_urb( 3068 edge_serial->interrupt_read_urb, 3069 dev, 3070 usb_rcvintpipe(dev, 3071 endpoint->bEndpointAddress), 3072 edge_serial->interrupt_in_buffer, 3073 buffer_size, 3074 edge_interrupt_callback, 3075 edge_serial, 3076 endpoint->bInterval); 3077 3078 interrupt_in_found = true; 3079 } 3080 3081 if (!bulk_in_found && 3082 (usb_endpoint_is_bulk_in(endpoint))) { 3083 /* we found a bulk in endpoint */ 3084 dbg("found bulk in"); 3085 3086 /* not set up yet, so do it now */ 3087 edge_serial->read_urb = 3088 usb_alloc_urb(0, GFP_KERNEL); 3089 if (!edge_serial->read_urb) { 3090 dev_err(&dev->dev, "out of memory\n"); 3091 return -ENOMEM; 3092 } 3093 edge_serial->bulk_in_buffer = 3094 kmalloc(buffer_size, GFP_KERNEL); 3095 if (!edge_serial->bulk_in_buffer) { 3096 dev_err(&dev->dev, "out of memory\n"); 3097 usb_free_urb(edge_serial->read_urb); 3098 return -ENOMEM; 3099 } 3100 edge_serial->bulk_in_endpoint = 3101 endpoint->bEndpointAddress; 3102 3103 /* set up our bulk in urb */ 3104 usb_fill_bulk_urb(edge_serial->read_urb, dev, 3105 usb_rcvbulkpipe(dev, 3106 endpoint->bEndpointAddress), 3107 edge_serial->bulk_in_buffer, 3108 usb_endpoint_maxp(endpoint), 3109 edge_bulk_in_callback, 3110 edge_serial); 3111 bulk_in_found = true; 3112 } 3113 3114 if (!bulk_out_found && 3115 (usb_endpoint_is_bulk_out(endpoint))) { 3116 /* we found a bulk out endpoint */ 3117 dbg("found bulk out"); 3118 edge_serial->bulk_out_endpoint = 3119 endpoint->bEndpointAddress; 3120 bulk_out_found = true; 3121 } 3122 } 3123 3124 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 3125 dev_err(&dev->dev, "Error - the proper endpoints " 3126 "were not found!\n"); 3127 return -ENODEV; 3128 } 3129 3130 /* start interrupt read for this edgeport this interrupt will 3131 * continue as long as the edgeport is connected */ 3132 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3133 GFP_KERNEL); 3134 if (response) 3135 dev_err(&dev->dev, 3136 "%s - Error %d submitting control urb\n", 3137 __func__, response); 3138 } 3139 return response; 3140 } 3141 3142 3143 /**************************************************************************** 3144 * edge_disconnect 3145 * This function is called whenever the device is removed from the usb bus. 3146 ****************************************************************************/ 3147 static void edge_disconnect(struct usb_serial *serial) 3148 { 3149 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3150 3151 dbg("%s", __func__); 3152 3153 /* stop reads and writes on all ports */ 3154 /* free up our endpoint stuff */ 3155 if (edge_serial->is_epic) { 3156 usb_kill_urb(edge_serial->interrupt_read_urb); 3157 usb_free_urb(edge_serial->interrupt_read_urb); 3158 kfree(edge_serial->interrupt_in_buffer); 3159 3160 usb_kill_urb(edge_serial->read_urb); 3161 usb_free_urb(edge_serial->read_urb); 3162 kfree(edge_serial->bulk_in_buffer); 3163 } 3164 } 3165 3166 3167 /**************************************************************************** 3168 * edge_release 3169 * This function is called when the device structure is deallocated. 3170 ****************************************************************************/ 3171 static void edge_release(struct usb_serial *serial) 3172 { 3173 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3174 int i; 3175 3176 dbg("%s", __func__); 3177 3178 for (i = 0; i < serial->num_ports; ++i) 3179 kfree(usb_get_serial_port_data(serial->port[i])); 3180 3181 kfree(edge_serial); 3182 } 3183 3184 module_usb_serial_driver(io_driver, serial_drivers); 3185 3186 MODULE_AUTHOR(DRIVER_AUTHOR); 3187 MODULE_DESCRIPTION(DRIVER_DESC); 3188 MODULE_LICENSE("GPL"); 3189 MODULE_FIRMWARE("edgeport/boot.fw"); 3190 MODULE_FIRMWARE("edgeport/boot2.fw"); 3191 MODULE_FIRMWARE("edgeport/down.fw"); 3192 MODULE_FIRMWARE("edgeport/down2.fw"); 3193 3194 module_param(debug, bool, S_IRUGO | S_IWUSR); 3195 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3196