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/slab.h> 36 #include <linux/tty.h> 37 #include <linux/tty_driver.h> 38 #include <linux/tty_flip.h> 39 #include <linux/module.h> 40 #include <linux/spinlock.h> 41 #include <linux/serial.h> 42 #include <linux/ioctl.h> 43 #include <linux/wait.h> 44 #include <linux/firmware.h> 45 #include <linux/ihex.h> 46 #include <linux/uaccess.h> 47 #include <linux/usb.h> 48 #include <linux/usb/serial.h> 49 #include "io_edgeport.h" 50 #include "io_ionsp.h" /* info for the iosp messages */ 51 #include "io_16654.h" /* 16654 UART defines */ 52 53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 54 #define DRIVER_DESC "Edgeport USB Serial Driver" 55 56 #define MAX_NAME_LEN 64 57 58 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 59 60 /* receive port state */ 61 enum RXSTATE { 62 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 63 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 64 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 65 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 66 }; 67 68 69 /* Transmit Fifo 70 * This Transmit queue is an extension of the edgeport Rx buffer. 71 * The maximum amount of data buffered in both the edgeport 72 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 73 */ 74 struct TxFifo { 75 unsigned int head; /* index to head pointer (write) */ 76 unsigned int tail; /* index to tail pointer (read) */ 77 unsigned int count; /* Bytes in queue */ 78 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 79 unsigned char *fifo; /* allocated Buffer */ 80 }; 81 82 /* This structure holds all of the local port information */ 83 struct edgeport_port { 84 __u16 txCredits; /* our current credits for this port */ 85 __u16 maxTxCredits; /* the max size of the port */ 86 87 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 88 struct urb *write_urb; /* write URB for this port */ 89 bool write_in_progress; /* 'true' while a write URB is outstanding */ 90 spinlock_t ep_lock; 91 92 __u8 shadowLCR; /* last LCR value received */ 93 __u8 shadowMCR; /* last MCR value received */ 94 __u8 shadowMSR; /* last MSR value received */ 95 __u8 shadowLSR; /* last LSR value received */ 96 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 97 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 98 __u8 validDataMask; 99 __u32 baudRate; 100 101 bool open; 102 bool openPending; 103 bool commandPending; 104 bool closePending; 105 bool chaseResponsePending; 106 107 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 108 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 109 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 110 111 struct usb_serial_port *port; /* loop back to the owner of this object */ 112 }; 113 114 115 /* This structure holds all of the individual device information */ 116 struct edgeport_serial { 117 char name[MAX_NAME_LEN+2]; /* string name of this device */ 118 119 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 120 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 121 struct edgeport_product_info product_info; /* Product Info */ 122 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 123 int is_epic; /* flag if EPiC device or not */ 124 125 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 126 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 127 struct urb *interrupt_read_urb; /* our interrupt urb */ 128 129 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 130 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 131 struct urb *read_urb; /* our bulk read urb */ 132 bool read_in_progress; 133 spinlock_t es_lock; 134 135 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 136 137 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 138 139 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 140 __u8 rxHeader1; /* receive header byte 1 */ 141 __u8 rxHeader2; /* receive header byte 2 */ 142 __u8 rxHeader3; /* receive header byte 3 */ 143 __u8 rxPort; /* the port that we are currently receiving data for */ 144 __u8 rxStatusCode; /* the receive status code */ 145 __u8 rxStatusParam; /* the receive status paramater */ 146 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 147 struct usb_serial *serial; /* loop back to the owner of this object */ 148 }; 149 150 /* baud rate information */ 151 struct divisor_table_entry { 152 __u32 BaudRate; 153 __u16 Divisor; 154 }; 155 156 /* 157 * Define table of divisors for Rev A EdgePort/4 hardware 158 * These assume a 3.6864MHz crystal, the standard /16, and 159 * MCR.7 = 0. 160 */ 161 162 static const struct divisor_table_entry divisor_table[] = { 163 { 50, 4608}, 164 { 75, 3072}, 165 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 166 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 167 { 150, 1536}, 168 { 300, 768}, 169 { 600, 384}, 170 { 1200, 192}, 171 { 1800, 128}, 172 { 2400, 96}, 173 { 4800, 48}, 174 { 7200, 32}, 175 { 9600, 24}, 176 { 14400, 16}, 177 { 19200, 12}, 178 { 38400, 6}, 179 { 57600, 4}, 180 { 115200, 2}, 181 { 230400, 1}, 182 }; 183 184 /* Number of outstanding Command Write Urbs */ 185 static atomic_t CmdUrbs = ATOMIC_INIT(0); 186 187 188 /* local function prototypes */ 189 190 /* function prototypes for all URB callbacks */ 191 static void edge_interrupt_callback(struct urb *urb); 192 static void edge_bulk_in_callback(struct urb *urb); 193 static void edge_bulk_out_data_callback(struct urb *urb); 194 static void edge_bulk_out_cmd_callback(struct urb *urb); 195 196 /* function prototypes for the usbserial callbacks */ 197 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); 198 static void edge_close(struct usb_serial_port *port); 199 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 200 const unsigned char *buf, int count); 201 static int edge_write_room(struct tty_struct *tty); 202 static int edge_chars_in_buffer(struct tty_struct *tty); 203 static void edge_throttle(struct tty_struct *tty); 204 static void edge_unthrottle(struct tty_struct *tty); 205 static void edge_set_termios(struct tty_struct *tty, 206 struct usb_serial_port *port, 207 struct ktermios *old_termios); 208 static int edge_ioctl(struct tty_struct *tty, 209 unsigned int cmd, unsigned long arg); 210 static void edge_break(struct tty_struct *tty, int break_state); 211 static int edge_tiocmget(struct tty_struct *tty); 212 static int edge_tiocmset(struct tty_struct *tty, 213 unsigned int set, unsigned int clear); 214 static int edge_startup(struct usb_serial *serial); 215 static void edge_disconnect(struct usb_serial *serial); 216 static void edge_release(struct usb_serial *serial); 217 static int edge_port_probe(struct usb_serial_port *port); 218 static int edge_port_remove(struct usb_serial_port *port); 219 220 #include "io_tables.h" /* all of the devices that this driver supports */ 221 222 /* function prototypes for all of our local functions */ 223 224 static void process_rcvd_data(struct edgeport_serial *edge_serial, 225 unsigned char *buffer, __u16 bufferLength); 226 static void process_rcvd_status(struct edgeport_serial *edge_serial, 227 __u8 byte2, __u8 byte3); 228 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 229 int length); 230 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 231 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 232 __u8 lsr, __u8 data); 233 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 234 __u8 param); 235 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor); 236 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 237 int baudRate); 238 static void change_port_settings(struct tty_struct *tty, 239 struct edgeport_port *edge_port, 240 struct ktermios *old_termios); 241 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 242 __u8 regNum, __u8 regValue); 243 static int write_cmd_usb(struct edgeport_port *edge_port, 244 unsigned char *buffer, int writeLength); 245 static void send_more_port_data(struct edgeport_serial *edge_serial, 246 struct edgeport_port *edge_port); 247 248 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 249 __u16 length, const __u8 *data); 250 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 251 __u16 length, __u8 *data); 252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 253 __u16 length, const __u8 *data); 254 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 255 static void get_boot_desc(struct edgeport_serial *edge_serial); 256 static void load_application_firmware(struct edgeport_serial *edge_serial); 257 258 static void unicode_to_ascii(char *string, int buflen, 259 __le16 *unicode, int unicode_size); 260 261 262 /* ************************************************************************ */ 263 /* ************************************************************************ */ 264 /* ************************************************************************ */ 265 /* ************************************************************************ */ 266 267 /************************************************************************ 268 * * 269 * update_edgeport_E2PROM() Compare current versions of * 270 * Boot ROM and Manufacture * 271 * Descriptors with versions * 272 * embedded in this driver * 273 * * 274 ************************************************************************/ 275 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 276 { 277 struct device *dev = &edge_serial->serial->dev->dev; 278 __u32 BootCurVer; 279 __u32 BootNewVer; 280 __u8 BootMajorVersion; 281 __u8 BootMinorVersion; 282 __u16 BootBuildNumber; 283 __u32 Bootaddr; 284 const struct ihex_binrec *rec; 285 const struct firmware *fw; 286 const char *fw_name; 287 int response; 288 289 switch (edge_serial->product_info.iDownloadFile) { 290 case EDGE_DOWNLOAD_FILE_I930: 291 fw_name = "edgeport/boot.fw"; 292 break; 293 case EDGE_DOWNLOAD_FILE_80251: 294 fw_name = "edgeport/boot2.fw"; 295 break; 296 default: 297 return; 298 } 299 300 response = request_ihex_firmware(&fw, fw_name, 301 &edge_serial->serial->dev->dev); 302 if (response) { 303 dev_err(dev, "Failed to load image \"%s\" err %d\n", 304 fw_name, response); 305 return; 306 } 307 308 rec = (const struct ihex_binrec *)fw->data; 309 BootMajorVersion = rec->data[0]; 310 BootMinorVersion = rec->data[1]; 311 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 312 313 /* Check Boot Image Version */ 314 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 315 (edge_serial->boot_descriptor.MinorVersion << 16) + 316 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 317 318 BootNewVer = (BootMajorVersion << 24) + 319 (BootMinorVersion << 16) + 320 BootBuildNumber; 321 322 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n", 323 edge_serial->boot_descriptor.MajorVersion, 324 edge_serial->boot_descriptor.MinorVersion, 325 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 326 327 328 if (BootNewVer > BootCurVer) { 329 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n", 330 edge_serial->boot_descriptor.MajorVersion, 331 edge_serial->boot_descriptor.MinorVersion, 332 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 333 BootMajorVersion, BootMinorVersion, BootBuildNumber); 334 335 dev_dbg(dev, "Downloading new Boot Image\n"); 336 337 for (rec = ihex_next_binrec(rec); rec; 338 rec = ihex_next_binrec(rec)) { 339 Bootaddr = be32_to_cpu(rec->addr); 340 response = rom_write(edge_serial->serial, 341 Bootaddr >> 16, 342 Bootaddr & 0xFFFF, 343 be16_to_cpu(rec->len), 344 &rec->data[0]); 345 if (response < 0) { 346 dev_err(&edge_serial->serial->dev->dev, 347 "rom_write failed (%x, %x, %d)\n", 348 Bootaddr >> 16, Bootaddr & 0xFFFF, 349 be16_to_cpu(rec->len)); 350 break; 351 } 352 } 353 } else { 354 dev_dbg(dev, "Boot Image -- already up to date\n"); 355 } 356 release_firmware(fw); 357 } 358 359 #if 0 360 /************************************************************************ 361 * 362 * Get string descriptor from device 363 * 364 ************************************************************************/ 365 static int get_string_desc(struct usb_device *dev, int Id, 366 struct usb_string_descriptor **pRetDesc) 367 { 368 struct usb_string_descriptor StringDesc; 369 struct usb_string_descriptor *pStringDesc; 370 371 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id); 372 373 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 374 sizeof(StringDesc))) 375 return 0; 376 377 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 378 if (!pStringDesc) 379 return -1; 380 381 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 382 StringDesc.bLength)) { 383 kfree(pStringDesc); 384 return -1; 385 } 386 387 *pRetDesc = pStringDesc; 388 return 0; 389 } 390 #endif 391 392 static void dump_product_info(struct edgeport_serial *edge_serial, 393 struct edgeport_product_info *product_info) 394 { 395 struct device *dev = &edge_serial->serial->dev->dev; 396 397 /* Dump Product Info structure */ 398 dev_dbg(dev, "**Product Information:\n"); 399 dev_dbg(dev, " ProductId %x\n", product_info->ProductId); 400 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts); 401 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer); 402 dev_dbg(dev, " IsServer %d\n", product_info->IsServer); 403 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232); 404 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422); 405 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485); 406 dev_dbg(dev, " RomSize %d\n", product_info->RomSize); 407 dev_dbg(dev, " RamSize %d\n", product_info->RamSize); 408 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev); 409 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev); 410 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n", 411 product_info->BootMajorVersion, 412 product_info->BootMinorVersion, 413 le16_to_cpu(product_info->BootBuildNumber)); 414 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n", 415 product_info->FirmwareMajorVersion, 416 product_info->FirmwareMinorVersion, 417 le16_to_cpu(product_info->FirmwareBuildNumber)); 418 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n", 419 product_info->ManufactureDescDate[0], 420 product_info->ManufactureDescDate[1], 421 product_info->ManufactureDescDate[2]+1900); 422 dev_dbg(dev, " iDownloadFile 0x%x\n", 423 product_info->iDownloadFile); 424 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer); 425 } 426 427 static void get_product_info(struct edgeport_serial *edge_serial) 428 { 429 struct edgeport_product_info *product_info = &edge_serial->product_info; 430 431 memset(product_info, 0, sizeof(struct edgeport_product_info)); 432 433 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 434 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 435 product_info->ProdInfoVer = 0; 436 437 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 438 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 439 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 440 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 441 442 product_info->BootMajorVersion = 443 edge_serial->boot_descriptor.MajorVersion; 444 product_info->BootMinorVersion = 445 edge_serial->boot_descriptor.MinorVersion; 446 product_info->BootBuildNumber = 447 edge_serial->boot_descriptor.BuildNumber; 448 449 memcpy(product_info->ManufactureDescDate, 450 edge_serial->manuf_descriptor.DescDate, 451 sizeof(edge_serial->manuf_descriptor.DescDate)); 452 453 /* check if this is 2nd generation hardware */ 454 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 455 & ION_DEVICE_ID_80251_NETCHIP) 456 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 457 else 458 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 459 460 /* Determine Product type and set appropriate flags */ 461 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 462 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 463 case ION_DEVICE_ID_EDGEPORT_4T: 464 case ION_DEVICE_ID_EDGEPORT_4: 465 case ION_DEVICE_ID_EDGEPORT_2: 466 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 467 case ION_DEVICE_ID_EDGEPORT_8: 468 case ION_DEVICE_ID_EDGEPORT_421: 469 case ION_DEVICE_ID_EDGEPORT_21: 470 case ION_DEVICE_ID_EDGEPORT_2_DIN: 471 case ION_DEVICE_ID_EDGEPORT_4_DIN: 472 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 473 product_info->IsRS232 = 1; 474 break; 475 476 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 477 product_info->IsRS422 = 1; 478 product_info->IsRS485 = 1; 479 break; 480 481 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 482 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 483 product_info->IsRS422 = 1; 484 break; 485 } 486 487 dump_product_info(edge_serial, product_info); 488 } 489 490 static int get_epic_descriptor(struct edgeport_serial *ep) 491 { 492 int result; 493 struct usb_serial *serial = ep->serial; 494 struct edgeport_product_info *product_info = &ep->product_info; 495 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 496 struct edge_compatibility_bits *bits; 497 struct device *dev = &serial->dev->dev; 498 499 ep->is_epic = 0; 500 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 501 USB_REQUEST_ION_GET_EPIC_DESC, 502 0xC0, 0x00, 0x00, 503 &ep->epic_descriptor, 504 sizeof(struct edge_compatibility_descriptor), 505 300); 506 507 if (result > 0) { 508 ep->is_epic = 1; 509 memset(product_info, 0, sizeof(struct edgeport_product_info)); 510 511 product_info->NumPorts = epic->NumPorts; 512 product_info->ProdInfoVer = 0; 513 product_info->FirmwareMajorVersion = epic->MajorVersion; 514 product_info->FirmwareMinorVersion = epic->MinorVersion; 515 product_info->FirmwareBuildNumber = epic->BuildNumber; 516 product_info->iDownloadFile = epic->iDownloadFile; 517 product_info->EpicVer = epic->EpicVer; 518 product_info->Epic = epic->Supports; 519 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 520 dump_product_info(ep, product_info); 521 522 bits = &ep->epic_descriptor.Supports; 523 dev_dbg(dev, "**EPIC descriptor:\n"); 524 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE"); 525 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE"); 526 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE"); 527 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE"); 528 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 529 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 530 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE"); 531 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE"); 532 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 533 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 534 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 535 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 536 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE"); 537 } 538 539 return result; 540 } 541 542 543 /************************************************************************/ 544 /************************************************************************/ 545 /* U S B C A L L B A C K F U N C T I O N S */ 546 /* U S B C A L L B A C K F U N C T I O N S */ 547 /************************************************************************/ 548 /************************************************************************/ 549 550 /***************************************************************************** 551 * edge_interrupt_callback 552 * this is the callback function for when we have received data on the 553 * interrupt endpoint. 554 *****************************************************************************/ 555 static void edge_interrupt_callback(struct urb *urb) 556 { 557 struct edgeport_serial *edge_serial = urb->context; 558 struct device *dev; 559 struct edgeport_port *edge_port; 560 struct usb_serial_port *port; 561 unsigned char *data = urb->transfer_buffer; 562 int length = urb->actual_length; 563 int bytes_avail; 564 int position; 565 int txCredits; 566 int portNumber; 567 int result; 568 int status = urb->status; 569 570 switch (status) { 571 case 0: 572 /* success */ 573 break; 574 case -ECONNRESET: 575 case -ENOENT: 576 case -ESHUTDOWN: 577 /* this urb is terminated, clean up */ 578 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 579 return; 580 default: 581 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); 582 goto exit; 583 } 584 585 dev = &edge_serial->serial->dev->dev; 586 587 /* process this interrupt-read even if there are no ports open */ 588 if (length) { 589 usb_serial_debug_data(dev, __func__, length, data); 590 591 if (length > 1) { 592 bytes_avail = data[0] | (data[1] << 8); 593 if (bytes_avail) { 594 spin_lock(&edge_serial->es_lock); 595 edge_serial->rxBytesAvail += bytes_avail; 596 dev_dbg(dev, 597 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n", 598 __func__, bytes_avail, 599 edge_serial->rxBytesAvail, 600 edge_serial->read_in_progress); 601 602 if (edge_serial->rxBytesAvail > 0 && 603 !edge_serial->read_in_progress) { 604 dev_dbg(dev, "%s - posting a read\n", __func__); 605 edge_serial->read_in_progress = true; 606 607 /* we have pending bytes on the 608 bulk in pipe, send a request */ 609 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 610 if (result) { 611 dev_err(dev, 612 "%s - usb_submit_urb(read bulk) failed with result = %d\n", 613 __func__, result); 614 edge_serial->read_in_progress = false; 615 } 616 } 617 spin_unlock(&edge_serial->es_lock); 618 } 619 } 620 /* grab the txcredits for the ports if available */ 621 position = 2; 622 portNumber = 0; 623 while ((position < length) && 624 (portNumber < edge_serial->serial->num_ports)) { 625 txCredits = data[position] | (data[position+1] << 8); 626 if (txCredits) { 627 port = edge_serial->serial->port[portNumber]; 628 edge_port = usb_get_serial_port_data(port); 629 if (edge_port->open) { 630 spin_lock(&edge_port->ep_lock); 631 edge_port->txCredits += txCredits; 632 spin_unlock(&edge_port->ep_lock); 633 dev_dbg(dev, "%s - txcredits for port%d = %d\n", 634 __func__, portNumber, 635 edge_port->txCredits); 636 637 /* tell the tty driver that something 638 has changed */ 639 tty_port_tty_wakeup(&edge_port->port->port); 640 /* Since we have more credit, check 641 if more data can be sent */ 642 send_more_port_data(edge_serial, 643 edge_port); 644 } 645 } 646 position += 2; 647 ++portNumber; 648 } 649 } 650 651 exit: 652 result = usb_submit_urb(urb, GFP_ATOMIC); 653 if (result) 654 dev_err(&urb->dev->dev, 655 "%s - Error %d submitting control urb\n", 656 __func__, result); 657 } 658 659 660 /***************************************************************************** 661 * edge_bulk_in_callback 662 * this is the callback function for when we have received data on the 663 * bulk in endpoint. 664 *****************************************************************************/ 665 static void edge_bulk_in_callback(struct urb *urb) 666 { 667 struct edgeport_serial *edge_serial = urb->context; 668 struct device *dev; 669 unsigned char *data = urb->transfer_buffer; 670 int retval; 671 __u16 raw_data_length; 672 int status = urb->status; 673 674 if (status) { 675 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", 676 __func__, status); 677 edge_serial->read_in_progress = false; 678 return; 679 } 680 681 if (urb->actual_length == 0) { 682 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__); 683 edge_serial->read_in_progress = false; 684 return; 685 } 686 687 dev = &edge_serial->serial->dev->dev; 688 raw_data_length = urb->actual_length; 689 690 usb_serial_debug_data(dev, __func__, raw_data_length, data); 691 692 spin_lock(&edge_serial->es_lock); 693 694 /* decrement our rxBytes available by the number that we just got */ 695 edge_serial->rxBytesAvail -= raw_data_length; 696 697 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__, 698 raw_data_length, edge_serial->rxBytesAvail); 699 700 process_rcvd_data(edge_serial, data, urb->actual_length); 701 702 /* check to see if there's any more data for us to read */ 703 if (edge_serial->rxBytesAvail > 0) { 704 dev_dbg(dev, "%s - posting a read\n", __func__); 705 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 706 if (retval) { 707 dev_err(dev, 708 "%s - usb_submit_urb(read bulk) failed, retval = %d\n", 709 __func__, retval); 710 edge_serial->read_in_progress = false; 711 } 712 } else { 713 edge_serial->read_in_progress = false; 714 } 715 716 spin_unlock(&edge_serial->es_lock); 717 } 718 719 720 /***************************************************************************** 721 * edge_bulk_out_data_callback 722 * this is the callback function for when we have finished sending 723 * serial data on the bulk out endpoint. 724 *****************************************************************************/ 725 static void edge_bulk_out_data_callback(struct urb *urb) 726 { 727 struct edgeport_port *edge_port = urb->context; 728 int status = urb->status; 729 730 if (status) { 731 dev_dbg(&urb->dev->dev, 732 "%s - nonzero write bulk status received: %d\n", 733 __func__, status); 734 } 735 736 if (edge_port->open) 737 tty_port_tty_wakeup(&edge_port->port->port); 738 739 /* Release the Write URB */ 740 edge_port->write_in_progress = false; 741 742 /* Check if more data needs to be sent */ 743 send_more_port_data((struct edgeport_serial *) 744 (usb_get_serial_data(edge_port->port->serial)), edge_port); 745 } 746 747 748 /***************************************************************************** 749 * BulkOutCmdCallback 750 * this is the callback function for when we have finished sending a 751 * command on the bulk out endpoint. 752 *****************************************************************************/ 753 static void edge_bulk_out_cmd_callback(struct urb *urb) 754 { 755 struct edgeport_port *edge_port = urb->context; 756 int status = urb->status; 757 758 atomic_dec(&CmdUrbs); 759 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n", 760 __func__, urb, atomic_read(&CmdUrbs)); 761 762 763 /* clean up the transfer buffer */ 764 kfree(urb->transfer_buffer); 765 766 /* Free the command urb */ 767 usb_free_urb(urb); 768 769 if (status) { 770 dev_dbg(&urb->dev->dev, 771 "%s - nonzero write bulk status received: %d\n", 772 __func__, status); 773 return; 774 } 775 776 /* tell the tty driver that something has changed */ 777 if (edge_port->open) 778 tty_port_tty_wakeup(&edge_port->port->port); 779 780 /* we have completed the command */ 781 edge_port->commandPending = false; 782 wake_up(&edge_port->wait_command); 783 } 784 785 786 /***************************************************************************** 787 * Driver tty interface functions 788 *****************************************************************************/ 789 790 /***************************************************************************** 791 * SerialOpen 792 * this function is called by the tty driver when a port is opened 793 * If successful, we return 0 794 * Otherwise we return a negative error number. 795 *****************************************************************************/ 796 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 797 { 798 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 799 struct device *dev = &port->dev; 800 struct usb_serial *serial; 801 struct edgeport_serial *edge_serial; 802 int response; 803 804 if (edge_port == NULL) 805 return -ENODEV; 806 807 /* see if we've set up our endpoint info yet (can't set it up 808 in edge_startup as the structures were not set up at that time.) */ 809 serial = port->serial; 810 edge_serial = usb_get_serial_data(serial); 811 if (edge_serial == NULL) 812 return -ENODEV; 813 if (edge_serial->interrupt_in_buffer == NULL) { 814 struct usb_serial_port *port0 = serial->port[0]; 815 816 /* not set up yet, so do it now */ 817 edge_serial->interrupt_in_buffer = 818 port0->interrupt_in_buffer; 819 edge_serial->interrupt_in_endpoint = 820 port0->interrupt_in_endpointAddress; 821 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 822 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 823 edge_serial->bulk_in_endpoint = 824 port0->bulk_in_endpointAddress; 825 edge_serial->read_urb = port0->read_urb; 826 edge_serial->bulk_out_endpoint = 827 port0->bulk_out_endpointAddress; 828 829 /* set up our interrupt urb */ 830 usb_fill_int_urb(edge_serial->interrupt_read_urb, 831 serial->dev, 832 usb_rcvintpipe(serial->dev, 833 port0->interrupt_in_endpointAddress), 834 port0->interrupt_in_buffer, 835 edge_serial->interrupt_read_urb->transfer_buffer_length, 836 edge_interrupt_callback, edge_serial, 837 edge_serial->interrupt_read_urb->interval); 838 839 /* set up our bulk in urb */ 840 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 841 usb_rcvbulkpipe(serial->dev, 842 port0->bulk_in_endpointAddress), 843 port0->bulk_in_buffer, 844 edge_serial->read_urb->transfer_buffer_length, 845 edge_bulk_in_callback, edge_serial); 846 edge_serial->read_in_progress = false; 847 848 /* start interrupt read for this edgeport 849 * this interrupt will continue as long 850 * as the edgeport is connected */ 851 response = usb_submit_urb(edge_serial->interrupt_read_urb, 852 GFP_KERNEL); 853 if (response) { 854 dev_err(dev, "%s - Error %d submitting control urb\n", 855 __func__, response); 856 } 857 } 858 859 /* initialize our wait queues */ 860 init_waitqueue_head(&edge_port->wait_open); 861 init_waitqueue_head(&edge_port->wait_chase); 862 init_waitqueue_head(&edge_port->wait_command); 863 864 /* initialize our port settings */ 865 edge_port->txCredits = 0; /* Can't send any data yet */ 866 /* Must always set this bit to enable ints! */ 867 edge_port->shadowMCR = MCR_MASTER_IE; 868 edge_port->chaseResponsePending = false; 869 870 /* send a open port command */ 871 edge_port->openPending = true; 872 edge_port->open = false; 873 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); 874 875 if (response < 0) { 876 dev_err(dev, "%s - error sending open port command\n", __func__); 877 edge_port->openPending = false; 878 return -ENODEV; 879 } 880 881 /* now wait for the port to be completely opened */ 882 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 883 OPEN_TIMEOUT); 884 885 if (!edge_port->open) { 886 /* open timed out */ 887 dev_dbg(dev, "%s - open timedout\n", __func__); 888 edge_port->openPending = false; 889 return -ENODEV; 890 } 891 892 /* create the txfifo */ 893 edge_port->txfifo.head = 0; 894 edge_port->txfifo.tail = 0; 895 edge_port->txfifo.count = 0; 896 edge_port->txfifo.size = edge_port->maxTxCredits; 897 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 898 899 if (!edge_port->txfifo.fifo) { 900 edge_close(port); 901 return -ENOMEM; 902 } 903 904 /* Allocate a URB for the write */ 905 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 906 edge_port->write_in_progress = false; 907 908 if (!edge_port->write_urb) { 909 edge_close(port); 910 return -ENOMEM; 911 } 912 913 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n", 914 __func__, edge_port->maxTxCredits); 915 916 return 0; 917 } 918 919 920 /************************************************************************ 921 * 922 * block_until_chase_response 923 * 924 * This function will block the close until one of the following: 925 * 1. Response to our Chase comes from Edgeport 926 * 2. A timeout of 10 seconds without activity has expired 927 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 928 * 929 ************************************************************************/ 930 static void block_until_chase_response(struct edgeport_port *edge_port) 931 { 932 struct device *dev = &edge_port->port->dev; 933 DEFINE_WAIT(wait); 934 __u16 lastCredits; 935 int timeout = 1*HZ; 936 int loop = 10; 937 938 while (1) { 939 /* Save Last credits */ 940 lastCredits = edge_port->txCredits; 941 942 /* Did we get our Chase response */ 943 if (!edge_port->chaseResponsePending) { 944 dev_dbg(dev, "%s - Got Chase Response\n", __func__); 945 946 /* did we get all of our credit back? */ 947 if (edge_port->txCredits == edge_port->maxTxCredits) { 948 dev_dbg(dev, "%s - Got all credits\n", __func__); 949 return; 950 } 951 } 952 953 /* Block the thread for a while */ 954 prepare_to_wait(&edge_port->wait_chase, &wait, 955 TASK_UNINTERRUPTIBLE); 956 schedule_timeout(timeout); 957 finish_wait(&edge_port->wait_chase, &wait); 958 959 if (lastCredits == edge_port->txCredits) { 960 /* No activity.. count down. */ 961 loop--; 962 if (loop == 0) { 963 edge_port->chaseResponsePending = false; 964 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__); 965 return; 966 } 967 } else { 968 /* Reset timeout value back to 10 seconds */ 969 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__, 970 lastCredits, edge_port->txCredits); 971 loop = 10; 972 } 973 } 974 } 975 976 977 /************************************************************************ 978 * 979 * block_until_tx_empty 980 * 981 * This function will block the close until one of the following: 982 * 1. TX count are 0 983 * 2. The edgeport has stopped 984 * 3. A timeout of 3 seconds without activity has expired 985 * 986 ************************************************************************/ 987 static void block_until_tx_empty(struct edgeport_port *edge_port) 988 { 989 struct device *dev = &edge_port->port->dev; 990 DEFINE_WAIT(wait); 991 struct TxFifo *fifo = &edge_port->txfifo; 992 __u32 lastCount; 993 int timeout = HZ/10; 994 int loop = 30; 995 996 while (1) { 997 /* Save Last count */ 998 lastCount = fifo->count; 999 1000 /* Is the Edgeport Buffer empty? */ 1001 if (lastCount == 0) { 1002 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__); 1003 return; 1004 } 1005 1006 /* Block the thread for a while */ 1007 prepare_to_wait(&edge_port->wait_chase, &wait, 1008 TASK_UNINTERRUPTIBLE); 1009 schedule_timeout(timeout); 1010 finish_wait(&edge_port->wait_chase, &wait); 1011 1012 dev_dbg(dev, "%s wait\n", __func__); 1013 1014 if (lastCount == fifo->count) { 1015 /* No activity.. count down. */ 1016 loop--; 1017 if (loop == 0) { 1018 dev_dbg(dev, "%s - TIMEOUT\n", __func__); 1019 return; 1020 } 1021 } else { 1022 /* Reset timeout value back to seconds */ 1023 loop = 30; 1024 } 1025 } 1026 } 1027 1028 1029 /***************************************************************************** 1030 * edge_close 1031 * this function is called by the tty driver when a port is closed 1032 *****************************************************************************/ 1033 static void edge_close(struct usb_serial_port *port) 1034 { 1035 struct edgeport_serial *edge_serial; 1036 struct edgeport_port *edge_port; 1037 int status; 1038 1039 edge_serial = usb_get_serial_data(port->serial); 1040 edge_port = usb_get_serial_port_data(port); 1041 if (edge_serial == NULL || edge_port == NULL) 1042 return; 1043 1044 /* block until tx is empty */ 1045 block_until_tx_empty(edge_port); 1046 1047 edge_port->closePending = true; 1048 1049 if (!edge_serial->is_epic || 1050 edge_serial->epic_descriptor.Supports.IOSPChase) { 1051 /* flush and chase */ 1052 edge_port->chaseResponsePending = true; 1053 1054 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1055 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1056 if (status == 0) 1057 /* block until chase finished */ 1058 block_until_chase_response(edge_port); 1059 else 1060 edge_port->chaseResponsePending = false; 1061 } 1062 1063 if (!edge_serial->is_epic || 1064 edge_serial->epic_descriptor.Supports.IOSPClose) { 1065 /* close the port */ 1066 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__); 1067 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1068 } 1069 1070 /* port->close = true; */ 1071 edge_port->closePending = false; 1072 edge_port->open = false; 1073 edge_port->openPending = false; 1074 1075 usb_kill_urb(edge_port->write_urb); 1076 1077 if (edge_port->write_urb) { 1078 /* if this urb had a transfer buffer already 1079 (old transfer) free it */ 1080 kfree(edge_port->write_urb->transfer_buffer); 1081 usb_free_urb(edge_port->write_urb); 1082 edge_port->write_urb = NULL; 1083 } 1084 kfree(edge_port->txfifo.fifo); 1085 edge_port->txfifo.fifo = NULL; 1086 } 1087 1088 /***************************************************************************** 1089 * SerialWrite 1090 * this function is called by the tty driver when data should be written 1091 * to the port. 1092 * If successful, we return the number of bytes written, otherwise we 1093 * return a negative error number. 1094 *****************************************************************************/ 1095 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1096 const unsigned char *data, int count) 1097 { 1098 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1099 struct TxFifo *fifo; 1100 int copySize; 1101 int bytesleft; 1102 int firsthalf; 1103 int secondhalf; 1104 unsigned long flags; 1105 1106 if (edge_port == NULL) 1107 return -ENODEV; 1108 1109 /* get a pointer to the Tx fifo */ 1110 fifo = &edge_port->txfifo; 1111 1112 spin_lock_irqsave(&edge_port->ep_lock, flags); 1113 1114 /* calculate number of bytes to put in fifo */ 1115 copySize = min((unsigned int)count, 1116 (edge_port->txCredits - fifo->count)); 1117 1118 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n", 1119 __func__, count, edge_port->txCredits - fifo->count, copySize); 1120 1121 /* catch writes of 0 bytes which the tty driver likes to give us, 1122 and when txCredits is empty */ 1123 if (copySize == 0) { 1124 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__); 1125 goto finish_write; 1126 } 1127 1128 /* queue the data 1129 * since we can never overflow the buffer we do not have to check for a 1130 * full condition 1131 * 1132 * the copy is done is two parts -- first fill to the end of the buffer 1133 * then copy the reset from the start of the buffer 1134 */ 1135 bytesleft = fifo->size - fifo->head; 1136 firsthalf = min(bytesleft, copySize); 1137 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__, 1138 firsthalf, bytesleft); 1139 1140 /* now copy our data */ 1141 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1142 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]); 1143 1144 /* update the index and size */ 1145 fifo->head += firsthalf; 1146 fifo->count += firsthalf; 1147 1148 /* wrap the index */ 1149 if (fifo->head == fifo->size) 1150 fifo->head = 0; 1151 1152 secondhalf = copySize-firsthalf; 1153 1154 if (secondhalf) { 1155 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf); 1156 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1157 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]); 1158 /* update the index and size */ 1159 fifo->count += secondhalf; 1160 fifo->head += secondhalf; 1161 /* No need to check for wrap since we can not get to end of 1162 * the fifo in this part 1163 */ 1164 } 1165 1166 finish_write: 1167 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1168 1169 send_more_port_data((struct edgeport_serial *) 1170 usb_get_serial_data(port->serial), edge_port); 1171 1172 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n", 1173 __func__, copySize, edge_port->txCredits, fifo->count); 1174 1175 return copySize; 1176 } 1177 1178 1179 /************************************************************************ 1180 * 1181 * send_more_port_data() 1182 * 1183 * This routine attempts to write additional UART transmit data 1184 * to a port over the USB bulk pipe. It is called (1) when new 1185 * data has been written to a port's TxBuffer from higher layers 1186 * (2) when the peripheral sends us additional TxCredits indicating 1187 * that it can accept more Tx data for a given port; and (3) when 1188 * a bulk write completes successfully and we want to see if we 1189 * can transmit more. 1190 * 1191 ************************************************************************/ 1192 static void send_more_port_data(struct edgeport_serial *edge_serial, 1193 struct edgeport_port *edge_port) 1194 { 1195 struct TxFifo *fifo = &edge_port->txfifo; 1196 struct device *dev = &edge_port->port->dev; 1197 struct urb *urb; 1198 unsigned char *buffer; 1199 int status; 1200 int count; 1201 int bytesleft; 1202 int firsthalf; 1203 int secondhalf; 1204 unsigned long flags; 1205 1206 spin_lock_irqsave(&edge_port->ep_lock, flags); 1207 1208 if (edge_port->write_in_progress || 1209 !edge_port->open || 1210 (fifo->count == 0)) { 1211 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n", 1212 __func__, fifo->count, edge_port->write_in_progress); 1213 goto exit_send; 1214 } 1215 1216 /* since the amount of data in the fifo will always fit into the 1217 * edgeport buffer we do not need to check the write length 1218 * 1219 * Do we have enough credits for this port to make it worthwhile 1220 * to bother queueing a write. If it's too small, say a few bytes, 1221 * it's better to wait for more credits so we can do a larger write. 1222 */ 1223 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1224 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n", 1225 __func__, fifo->count, edge_port->txCredits); 1226 goto exit_send; 1227 } 1228 1229 /* lock this write */ 1230 edge_port->write_in_progress = true; 1231 1232 /* get a pointer to the write_urb */ 1233 urb = edge_port->write_urb; 1234 1235 /* make sure transfer buffer is freed */ 1236 kfree(urb->transfer_buffer); 1237 urb->transfer_buffer = NULL; 1238 1239 /* build the data header for the buffer and port that we are about 1240 to send out */ 1241 count = fifo->count; 1242 buffer = kmalloc(count+2, GFP_ATOMIC); 1243 if (!buffer) { 1244 edge_port->write_in_progress = false; 1245 goto exit_send; 1246 } 1247 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count); 1248 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count); 1249 1250 /* now copy our data */ 1251 bytesleft = fifo->size - fifo->tail; 1252 firsthalf = min(bytesleft, count); 1253 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1254 fifo->tail += firsthalf; 1255 fifo->count -= firsthalf; 1256 if (fifo->tail == fifo->size) 1257 fifo->tail = 0; 1258 1259 secondhalf = count-firsthalf; 1260 if (secondhalf) { 1261 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1262 secondhalf); 1263 fifo->tail += secondhalf; 1264 fifo->count -= secondhalf; 1265 } 1266 1267 if (count) 1268 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]); 1269 1270 /* fill up the urb with all of our data and submit it */ 1271 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1272 usb_sndbulkpipe(edge_serial->serial->dev, 1273 edge_serial->bulk_out_endpoint), 1274 buffer, count+2, 1275 edge_bulk_out_data_callback, edge_port); 1276 1277 /* decrement the number of credits we have by the number we just sent */ 1278 edge_port->txCredits -= count; 1279 edge_port->port->icount.tx += count; 1280 1281 status = usb_submit_urb(urb, GFP_ATOMIC); 1282 if (status) { 1283 /* something went wrong */ 1284 dev_err_console(edge_port->port, 1285 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1286 __func__, status); 1287 edge_port->write_in_progress = false; 1288 1289 /* revert the credits as something bad happened. */ 1290 edge_port->txCredits += count; 1291 edge_port->port->icount.tx -= count; 1292 } 1293 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n", 1294 __func__, count, edge_port->txCredits, fifo->count); 1295 1296 exit_send: 1297 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1298 } 1299 1300 1301 /***************************************************************************** 1302 * edge_write_room 1303 * this function is called by the tty driver when it wants to know how 1304 * many bytes of data we can accept for a specific port. If successful, 1305 * we return the amount of room that we have for this port (the txCredits) 1306 * otherwise we return a negative error number. 1307 *****************************************************************************/ 1308 static int edge_write_room(struct tty_struct *tty) 1309 { 1310 struct usb_serial_port *port = tty->driver_data; 1311 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1312 int room; 1313 unsigned long flags; 1314 1315 if (edge_port == NULL) 1316 return 0; 1317 if (edge_port->closePending) 1318 return 0; 1319 1320 if (!edge_port->open) { 1321 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1322 return 0; 1323 } 1324 1325 /* total of both buffers is still txCredit */ 1326 spin_lock_irqsave(&edge_port->ep_lock, flags); 1327 room = edge_port->txCredits - edge_port->txfifo.count; 1328 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1329 1330 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 1331 return room; 1332 } 1333 1334 1335 /***************************************************************************** 1336 * edge_chars_in_buffer 1337 * this function is called by the tty driver when it wants to know how 1338 * many bytes of data we currently have outstanding in the port (data that 1339 * has been written, but hasn't made it out the port yet) 1340 * If successful, we return the number of bytes left to be written in the 1341 * system, 1342 * Otherwise we return a negative error number. 1343 *****************************************************************************/ 1344 static int edge_chars_in_buffer(struct tty_struct *tty) 1345 { 1346 struct usb_serial_port *port = tty->driver_data; 1347 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1348 int num_chars; 1349 unsigned long flags; 1350 1351 if (edge_port == NULL) 1352 return 0; 1353 if (edge_port->closePending) 1354 return 0; 1355 1356 if (!edge_port->open) { 1357 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1358 return 0; 1359 } 1360 1361 spin_lock_irqsave(&edge_port->ep_lock, flags); 1362 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1363 edge_port->txfifo.count; 1364 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1365 if (num_chars) { 1366 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars); 1367 } 1368 1369 return num_chars; 1370 } 1371 1372 1373 /***************************************************************************** 1374 * SerialThrottle 1375 * this function is called by the tty driver when it wants to stop the data 1376 * being read from the port. 1377 *****************************************************************************/ 1378 static void edge_throttle(struct tty_struct *tty) 1379 { 1380 struct usb_serial_port *port = tty->driver_data; 1381 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1382 int status; 1383 1384 if (edge_port == NULL) 1385 return; 1386 1387 if (!edge_port->open) { 1388 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1389 return; 1390 } 1391 1392 /* if we are implementing XON/XOFF, send the stop character */ 1393 if (I_IXOFF(tty)) { 1394 unsigned char stop_char = STOP_CHAR(tty); 1395 status = edge_write(tty, port, &stop_char, 1); 1396 if (status <= 0) 1397 return; 1398 } 1399 1400 /* if we are implementing RTS/CTS, toggle that line */ 1401 if (C_CRTSCTS(tty)) { 1402 edge_port->shadowMCR &= ~MCR_RTS; 1403 status = send_cmd_write_uart_register(edge_port, MCR, 1404 edge_port->shadowMCR); 1405 if (status != 0) 1406 return; 1407 } 1408 } 1409 1410 1411 /***************************************************************************** 1412 * edge_unthrottle 1413 * this function is called by the tty driver when it wants to resume the 1414 * data being read from the port (called after SerialThrottle is called) 1415 *****************************************************************************/ 1416 static void edge_unthrottle(struct tty_struct *tty) 1417 { 1418 struct usb_serial_port *port = tty->driver_data; 1419 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1420 int status; 1421 1422 if (edge_port == NULL) 1423 return; 1424 1425 if (!edge_port->open) { 1426 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1427 return; 1428 } 1429 1430 /* if we are implementing XON/XOFF, send the start character */ 1431 if (I_IXOFF(tty)) { 1432 unsigned char start_char = START_CHAR(tty); 1433 status = edge_write(tty, port, &start_char, 1); 1434 if (status <= 0) 1435 return; 1436 } 1437 /* if we are implementing RTS/CTS, toggle that line */ 1438 if (C_CRTSCTS(tty)) { 1439 edge_port->shadowMCR |= MCR_RTS; 1440 send_cmd_write_uart_register(edge_port, MCR, 1441 edge_port->shadowMCR); 1442 } 1443 } 1444 1445 1446 /***************************************************************************** 1447 * SerialSetTermios 1448 * this function is called by the tty driver when it wants to change 1449 * the termios structure 1450 *****************************************************************************/ 1451 static void edge_set_termios(struct tty_struct *tty, 1452 struct usb_serial_port *port, struct ktermios *old_termios) 1453 { 1454 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1455 unsigned int cflag; 1456 1457 cflag = tty->termios.c_cflag; 1458 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag); 1459 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag); 1460 1461 if (edge_port == NULL) 1462 return; 1463 1464 if (!edge_port->open) { 1465 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1466 return; 1467 } 1468 1469 /* change the port settings to the new ones specified */ 1470 change_port_settings(tty, edge_port, old_termios); 1471 } 1472 1473 1474 /***************************************************************************** 1475 * get_lsr_info - get line status register info 1476 * 1477 * Purpose: Let user call ioctl() to get info when the UART physically 1478 * is emptied. On bus types like RS485, the transmitter must 1479 * release the bus after transmitting. This must be done when 1480 * the transmit shift register is empty, not be done when the 1481 * transmit holding register is empty. This functionality 1482 * allows an RS485 driver to be written in user space. 1483 *****************************************************************************/ 1484 static int get_lsr_info(struct edgeport_port *edge_port, 1485 unsigned int __user *value) 1486 { 1487 unsigned int result = 0; 1488 unsigned long flags; 1489 1490 spin_lock_irqsave(&edge_port->ep_lock, flags); 1491 if (edge_port->maxTxCredits == edge_port->txCredits && 1492 edge_port->txfifo.count == 0) { 1493 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__); 1494 result = TIOCSER_TEMT; 1495 } 1496 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1497 1498 if (copy_to_user(value, &result, sizeof(int))) 1499 return -EFAULT; 1500 return 0; 1501 } 1502 1503 static int edge_tiocmset(struct tty_struct *tty, 1504 unsigned int set, unsigned int clear) 1505 { 1506 struct usb_serial_port *port = tty->driver_data; 1507 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1508 unsigned int mcr; 1509 1510 mcr = edge_port->shadowMCR; 1511 if (set & TIOCM_RTS) 1512 mcr |= MCR_RTS; 1513 if (set & TIOCM_DTR) 1514 mcr |= MCR_DTR; 1515 if (set & TIOCM_LOOP) 1516 mcr |= MCR_LOOPBACK; 1517 1518 if (clear & TIOCM_RTS) 1519 mcr &= ~MCR_RTS; 1520 if (clear & TIOCM_DTR) 1521 mcr &= ~MCR_DTR; 1522 if (clear & TIOCM_LOOP) 1523 mcr &= ~MCR_LOOPBACK; 1524 1525 edge_port->shadowMCR = mcr; 1526 1527 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1528 1529 return 0; 1530 } 1531 1532 static int edge_tiocmget(struct tty_struct *tty) 1533 { 1534 struct usb_serial_port *port = tty->driver_data; 1535 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1536 unsigned int result = 0; 1537 unsigned int msr; 1538 unsigned int mcr; 1539 1540 msr = edge_port->shadowMSR; 1541 mcr = edge_port->shadowMCR; 1542 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1543 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1544 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1545 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1546 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1547 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1548 1549 return result; 1550 } 1551 1552 static int get_serial_info(struct edgeport_port *edge_port, 1553 struct serial_struct __user *retinfo) 1554 { 1555 struct serial_struct tmp; 1556 1557 if (!retinfo) 1558 return -EFAULT; 1559 1560 memset(&tmp, 0, sizeof(tmp)); 1561 1562 tmp.type = PORT_16550A; 1563 tmp.line = edge_port->port->minor; 1564 tmp.port = edge_port->port->port_number; 1565 tmp.irq = 0; 1566 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1567 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1568 tmp.baud_base = 9600; 1569 tmp.close_delay = 5*HZ; 1570 tmp.closing_wait = 30*HZ; 1571 1572 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1573 return -EFAULT; 1574 return 0; 1575 } 1576 1577 1578 /***************************************************************************** 1579 * SerialIoctl 1580 * this function handles any ioctl calls to the driver 1581 *****************************************************************************/ 1582 static int edge_ioctl(struct tty_struct *tty, 1583 unsigned int cmd, unsigned long arg) 1584 { 1585 struct usb_serial_port *port = tty->driver_data; 1586 DEFINE_WAIT(wait); 1587 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1588 1589 switch (cmd) { 1590 case TIOCSERGETLSR: 1591 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1592 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1593 1594 case TIOCGSERIAL: 1595 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 1596 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1597 } 1598 return -ENOIOCTLCMD; 1599 } 1600 1601 1602 /***************************************************************************** 1603 * SerialBreak 1604 * this function sends a break to the port 1605 *****************************************************************************/ 1606 static void edge_break(struct tty_struct *tty, int break_state) 1607 { 1608 struct usb_serial_port *port = tty->driver_data; 1609 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1610 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1611 int status; 1612 1613 if (!edge_serial->is_epic || 1614 edge_serial->epic_descriptor.Supports.IOSPChase) { 1615 /* flush and chase */ 1616 edge_port->chaseResponsePending = true; 1617 1618 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1619 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1620 if (status == 0) { 1621 /* block until chase finished */ 1622 block_until_chase_response(edge_port); 1623 } else { 1624 edge_port->chaseResponsePending = false; 1625 } 1626 } 1627 1628 if (!edge_serial->is_epic || 1629 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) { 1630 if (break_state == -1) { 1631 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__); 1632 status = send_iosp_ext_cmd(edge_port, 1633 IOSP_CMD_SET_BREAK, 0); 1634 } else { 1635 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__); 1636 status = send_iosp_ext_cmd(edge_port, 1637 IOSP_CMD_CLEAR_BREAK, 0); 1638 } 1639 if (status) 1640 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n", 1641 __func__); 1642 } 1643 } 1644 1645 1646 /***************************************************************************** 1647 * process_rcvd_data 1648 * this function handles the data received on the bulk in pipe. 1649 *****************************************************************************/ 1650 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1651 unsigned char *buffer, __u16 bufferLength) 1652 { 1653 struct device *dev = &edge_serial->serial->dev->dev; 1654 struct usb_serial_port *port; 1655 struct edgeport_port *edge_port; 1656 __u16 lastBufferLength; 1657 __u16 rxLen; 1658 1659 lastBufferLength = bufferLength + 1; 1660 1661 while (bufferLength > 0) { 1662 /* failsafe incase we get a message that we don't understand */ 1663 if (lastBufferLength == bufferLength) { 1664 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__); 1665 break; 1666 } 1667 lastBufferLength = bufferLength; 1668 1669 switch (edge_serial->rxState) { 1670 case EXPECT_HDR1: 1671 edge_serial->rxHeader1 = *buffer; 1672 ++buffer; 1673 --bufferLength; 1674 1675 if (bufferLength == 0) { 1676 edge_serial->rxState = EXPECT_HDR2; 1677 break; 1678 } 1679 /* otherwise, drop on through */ 1680 case EXPECT_HDR2: 1681 edge_serial->rxHeader2 = *buffer; 1682 ++buffer; 1683 --bufferLength; 1684 1685 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__, 1686 edge_serial->rxHeader1, edge_serial->rxHeader2); 1687 /* Process depending on whether this header is 1688 * data or status */ 1689 1690 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1691 /* Decode this status header and go to 1692 * EXPECT_HDR1 (if we can process the status 1693 * with only 2 bytes), or go to EXPECT_HDR3 to 1694 * get the third byte. */ 1695 edge_serial->rxPort = 1696 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1697 edge_serial->rxStatusCode = 1698 IOSP_GET_STATUS_CODE( 1699 edge_serial->rxHeader1); 1700 1701 if (!IOSP_STATUS_IS_2BYTE( 1702 edge_serial->rxStatusCode)) { 1703 /* This status needs additional bytes. 1704 * Save what we have and then wait for 1705 * more data. 1706 */ 1707 edge_serial->rxStatusParam 1708 = edge_serial->rxHeader2; 1709 edge_serial->rxState = EXPECT_HDR3; 1710 break; 1711 } 1712 /* We have all the header bytes, process the 1713 status now */ 1714 process_rcvd_status(edge_serial, 1715 edge_serial->rxHeader2, 0); 1716 edge_serial->rxState = EXPECT_HDR1; 1717 break; 1718 } else { 1719 edge_serial->rxPort = 1720 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1721 edge_serial->rxBytesRemaining = 1722 IOSP_GET_HDR_DATA_LEN( 1723 edge_serial->rxHeader1, 1724 edge_serial->rxHeader2); 1725 dev_dbg(dev, "%s - Data for Port %u Len %u\n", 1726 __func__, 1727 edge_serial->rxPort, 1728 edge_serial->rxBytesRemaining); 1729 1730 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1731 * ASSERT(DevExt->RxBytesRemaining < 1732 * IOSP_MAX_DATA_LENGTH); 1733 */ 1734 1735 if (bufferLength == 0) { 1736 edge_serial->rxState = EXPECT_DATA; 1737 break; 1738 } 1739 /* Else, drop through */ 1740 } 1741 case EXPECT_DATA: /* Expect data */ 1742 if (bufferLength < edge_serial->rxBytesRemaining) { 1743 rxLen = bufferLength; 1744 /* Expect data to start next buffer */ 1745 edge_serial->rxState = EXPECT_DATA; 1746 } else { 1747 /* BufLen >= RxBytesRemaining */ 1748 rxLen = edge_serial->rxBytesRemaining; 1749 /* Start another header next time */ 1750 edge_serial->rxState = EXPECT_HDR1; 1751 } 1752 1753 bufferLength -= rxLen; 1754 edge_serial->rxBytesRemaining -= rxLen; 1755 1756 /* spit this data back into the tty driver if this 1757 port is open */ 1758 if (rxLen) { 1759 port = edge_serial->serial->port[ 1760 edge_serial->rxPort]; 1761 edge_port = usb_get_serial_port_data(port); 1762 if (edge_port->open) { 1763 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", 1764 __func__, rxLen, 1765 edge_serial->rxPort); 1766 edge_tty_recv(edge_port->port, buffer, 1767 rxLen); 1768 edge_port->port->icount.rx += rxLen; 1769 } 1770 buffer += rxLen; 1771 } 1772 break; 1773 1774 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1775 edge_serial->rxHeader3 = *buffer; 1776 ++buffer; 1777 --bufferLength; 1778 1779 /* We have all the header bytes, process the 1780 status now */ 1781 process_rcvd_status(edge_serial, 1782 edge_serial->rxStatusParam, 1783 edge_serial->rxHeader3); 1784 edge_serial->rxState = EXPECT_HDR1; 1785 break; 1786 } 1787 } 1788 } 1789 1790 1791 /***************************************************************************** 1792 * process_rcvd_status 1793 * this function handles the any status messages received on the 1794 * bulk in pipe. 1795 *****************************************************************************/ 1796 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1797 __u8 byte2, __u8 byte3) 1798 { 1799 struct usb_serial_port *port; 1800 struct edgeport_port *edge_port; 1801 struct tty_struct *tty; 1802 struct device *dev; 1803 __u8 code = edge_serial->rxStatusCode; 1804 1805 /* switch the port pointer to the one being currently talked about */ 1806 port = edge_serial->serial->port[edge_serial->rxPort]; 1807 edge_port = usb_get_serial_port_data(port); 1808 if (edge_port == NULL) { 1809 dev_err(&edge_serial->serial->dev->dev, 1810 "%s - edge_port == NULL for port %d\n", 1811 __func__, edge_serial->rxPort); 1812 return; 1813 } 1814 dev = &port->dev; 1815 1816 if (code == IOSP_EXT_STATUS) { 1817 switch (byte2) { 1818 case IOSP_EXT_STATUS_CHASE_RSP: 1819 /* we want to do EXT status regardless of port 1820 * open/closed */ 1821 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n", 1822 __func__, edge_serial->rxPort, byte3); 1823 /* Currently, the only EXT_STATUS is Chase, so process 1824 * here instead of one more call to one more subroutine 1825 * If/when more EXT_STATUS, there'll be more work to do 1826 * Also, we currently clear flag and close the port 1827 * regardless of content of above's Byte3. 1828 * We could choose to do something else when Byte3 says 1829 * Timeout on Chase from Edgeport, like wait longer in 1830 * block_until_chase_response, but for now we don't. 1831 */ 1832 edge_port->chaseResponsePending = false; 1833 wake_up(&edge_port->wait_chase); 1834 return; 1835 1836 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1837 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", 1838 __func__, edge_serial->rxPort, byte3); 1839 /* Port->RxCheckRsp = true; */ 1840 return; 1841 } 1842 } 1843 1844 if (code == IOSP_STATUS_OPEN_RSP) { 1845 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1846 edge_port->maxTxCredits = edge_port->txCredits; 1847 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n", 1848 __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 1849 handle_new_msr(edge_port, byte2); 1850 1851 /* send the current line settings to the port so we are 1852 in sync with any further termios calls */ 1853 tty = tty_port_tty_get(&edge_port->port->port); 1854 if (tty) { 1855 change_port_settings(tty, 1856 edge_port, &tty->termios); 1857 tty_kref_put(tty); 1858 } 1859 1860 /* we have completed the open */ 1861 edge_port->openPending = false; 1862 edge_port->open = true; 1863 wake_up(&edge_port->wait_open); 1864 return; 1865 } 1866 1867 /* If port is closed, silently discard all rcvd status. We can 1868 * have cases where buffered status is received AFTER the close 1869 * port command is sent to the Edgeport. 1870 */ 1871 if (!edge_port->open || edge_port->closePending) 1872 return; 1873 1874 switch (code) { 1875 /* Not currently sent by Edgeport */ 1876 case IOSP_STATUS_LSR: 1877 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n", 1878 __func__, edge_serial->rxPort, byte2); 1879 handle_new_lsr(edge_port, false, byte2, 0); 1880 break; 1881 1882 case IOSP_STATUS_LSR_DATA: 1883 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n", 1884 __func__, edge_serial->rxPort, byte2, byte3); 1885 /* byte2 is LSR Register */ 1886 /* byte3 is broken data byte */ 1887 handle_new_lsr(edge_port, true, byte2, byte3); 1888 break; 1889 /* 1890 * case IOSP_EXT_4_STATUS: 1891 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n", 1892 * __func__, edge_serial->rxPort, byte2, byte3); 1893 * break; 1894 */ 1895 case IOSP_STATUS_MSR: 1896 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n", 1897 __func__, edge_serial->rxPort, byte2); 1898 /* 1899 * Process this new modem status and generate appropriate 1900 * events, etc, based on the new status. This routine 1901 * also saves the MSR in Port->ShadowMsr. 1902 */ 1903 handle_new_msr(edge_port, byte2); 1904 break; 1905 1906 default: 1907 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code); 1908 break; 1909 } 1910 } 1911 1912 1913 /***************************************************************************** 1914 * edge_tty_recv 1915 * this function passes data on to the tty flip buffer 1916 *****************************************************************************/ 1917 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1918 int length) 1919 { 1920 int cnt; 1921 1922 cnt = tty_insert_flip_string(&port->port, data, length); 1923 if (cnt < length) { 1924 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1925 __func__, length - cnt); 1926 } 1927 data += cnt; 1928 length -= cnt; 1929 1930 tty_flip_buffer_push(&port->port); 1931 } 1932 1933 1934 /***************************************************************************** 1935 * handle_new_msr 1936 * this function handles any change to the msr register for a port. 1937 *****************************************************************************/ 1938 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 1939 { 1940 struct async_icount *icount; 1941 1942 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1943 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1944 icount = &edge_port->port->icount; 1945 1946 /* update input line counters */ 1947 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 1948 icount->cts++; 1949 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 1950 icount->dsr++; 1951 if (newMsr & EDGEPORT_MSR_DELTA_CD) 1952 icount->dcd++; 1953 if (newMsr & EDGEPORT_MSR_DELTA_RI) 1954 icount->rng++; 1955 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 1956 } 1957 1958 /* Save the new modem status */ 1959 edge_port->shadowMSR = newMsr & 0xf0; 1960 } 1961 1962 1963 /***************************************************************************** 1964 * handle_new_lsr 1965 * this function handles any change to the lsr register for a port. 1966 *****************************************************************************/ 1967 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 1968 __u8 lsr, __u8 data) 1969 { 1970 __u8 newLsr = (__u8) (lsr & (__u8) 1971 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 1972 struct async_icount *icount; 1973 1974 edge_port->shadowLSR = lsr; 1975 1976 if (newLsr & LSR_BREAK) { 1977 /* 1978 * Parity and Framing errors only count if they 1979 * occur exclusive of a break being 1980 * received. 1981 */ 1982 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1983 } 1984 1985 /* Place LSR data byte into Rx buffer */ 1986 if (lsrData) 1987 edge_tty_recv(edge_port->port, &data, 1); 1988 1989 /* update input line counters */ 1990 icount = &edge_port->port->icount; 1991 if (newLsr & LSR_BREAK) 1992 icount->brk++; 1993 if (newLsr & LSR_OVER_ERR) 1994 icount->overrun++; 1995 if (newLsr & LSR_PAR_ERR) 1996 icount->parity++; 1997 if (newLsr & LSR_FRM_ERR) 1998 icount->frame++; 1999 } 2000 2001 2002 /**************************************************************************** 2003 * sram_write 2004 * writes a number of bytes to the Edgeport device's sram starting at the 2005 * given address. 2006 * If successful returns the number of bytes written, otherwise it returns 2007 * a negative error number of the problem. 2008 ****************************************************************************/ 2009 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2010 __u16 length, const __u8 *data) 2011 { 2012 int result; 2013 __u16 current_length; 2014 unsigned char *transfer_buffer; 2015 2016 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length); 2017 2018 transfer_buffer = kmalloc(64, GFP_KERNEL); 2019 if (!transfer_buffer) 2020 return -ENOMEM; 2021 2022 /* need to split these writes up into 64 byte chunks */ 2023 result = 0; 2024 while (length > 0) { 2025 if (length > 64) 2026 current_length = 64; 2027 else 2028 current_length = length; 2029 2030 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */ 2031 memcpy(transfer_buffer, data, current_length); 2032 result = usb_control_msg(serial->dev, 2033 usb_sndctrlpipe(serial->dev, 0), 2034 USB_REQUEST_ION_WRITE_RAM, 2035 0x40, addr, extAddr, transfer_buffer, 2036 current_length, 300); 2037 if (result < 0) 2038 break; 2039 length -= current_length; 2040 addr += current_length; 2041 data += current_length; 2042 } 2043 2044 kfree(transfer_buffer); 2045 return result; 2046 } 2047 2048 2049 /**************************************************************************** 2050 * rom_write 2051 * writes a number of bytes to the Edgeport device's ROM starting at the 2052 * given address. 2053 * If successful returns the number of bytes written, otherwise it returns 2054 * a negative error number of the problem. 2055 ****************************************************************************/ 2056 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2057 __u16 length, const __u8 *data) 2058 { 2059 int result; 2060 __u16 current_length; 2061 unsigned char *transfer_buffer; 2062 2063 transfer_buffer = kmalloc(64, GFP_KERNEL); 2064 if (!transfer_buffer) 2065 return -ENOMEM; 2066 2067 /* need to split these writes up into 64 byte chunks */ 2068 result = 0; 2069 while (length > 0) { 2070 if (length > 64) 2071 current_length = 64; 2072 else 2073 current_length = length; 2074 memcpy(transfer_buffer, data, current_length); 2075 result = usb_control_msg(serial->dev, 2076 usb_sndctrlpipe(serial->dev, 0), 2077 USB_REQUEST_ION_WRITE_ROM, 0x40, 2078 addr, extAddr, 2079 transfer_buffer, current_length, 300); 2080 if (result < 0) 2081 break; 2082 length -= current_length; 2083 addr += current_length; 2084 data += current_length; 2085 } 2086 2087 kfree(transfer_buffer); 2088 return result; 2089 } 2090 2091 2092 /**************************************************************************** 2093 * rom_read 2094 * reads a number of bytes from the Edgeport device starting at the given 2095 * address. 2096 * If successful returns the number of bytes read, otherwise it returns 2097 * a negative error number of the problem. 2098 ****************************************************************************/ 2099 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2100 __u16 addr, __u16 length, __u8 *data) 2101 { 2102 int result; 2103 __u16 current_length; 2104 unsigned char *transfer_buffer; 2105 2106 transfer_buffer = kmalloc(64, GFP_KERNEL); 2107 if (!transfer_buffer) 2108 return -ENOMEM; 2109 2110 /* need to split these reads up into 64 byte chunks */ 2111 result = 0; 2112 while (length > 0) { 2113 if (length > 64) 2114 current_length = 64; 2115 else 2116 current_length = length; 2117 result = usb_control_msg(serial->dev, 2118 usb_rcvctrlpipe(serial->dev, 0), 2119 USB_REQUEST_ION_READ_ROM, 2120 0xC0, addr, extAddr, transfer_buffer, 2121 current_length, 300); 2122 if (result < 0) 2123 break; 2124 memcpy(data, transfer_buffer, current_length); 2125 length -= current_length; 2126 addr += current_length; 2127 data += current_length; 2128 } 2129 2130 kfree(transfer_buffer); 2131 return result; 2132 } 2133 2134 2135 /**************************************************************************** 2136 * send_iosp_ext_cmd 2137 * Is used to send a IOSP message to the Edgeport device 2138 ****************************************************************************/ 2139 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2140 __u8 command, __u8 param) 2141 { 2142 unsigned char *buffer; 2143 unsigned char *currentCommand; 2144 int length = 0; 2145 int status = 0; 2146 2147 buffer = kmalloc(10, GFP_ATOMIC); 2148 if (!buffer) 2149 return -ENOMEM; 2150 2151 currentCommand = buffer; 2152 2153 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number, 2154 command, param); 2155 2156 status = write_cmd_usb(edge_port, buffer, length); 2157 if (status) { 2158 /* something bad happened, let's free up the memory */ 2159 kfree(buffer); 2160 } 2161 2162 return status; 2163 } 2164 2165 2166 /***************************************************************************** 2167 * write_cmd_usb 2168 * this function writes the given buffer out to the bulk write endpoint. 2169 *****************************************************************************/ 2170 static int write_cmd_usb(struct edgeport_port *edge_port, 2171 unsigned char *buffer, int length) 2172 { 2173 struct edgeport_serial *edge_serial = 2174 usb_get_serial_data(edge_port->port->serial); 2175 struct device *dev = &edge_port->port->dev; 2176 int status = 0; 2177 struct urb *urb; 2178 2179 usb_serial_debug_data(dev, __func__, length, buffer); 2180 2181 /* Allocate our next urb */ 2182 urb = usb_alloc_urb(0, GFP_ATOMIC); 2183 if (!urb) 2184 return -ENOMEM; 2185 2186 atomic_inc(&CmdUrbs); 2187 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n", 2188 __func__, urb, atomic_read(&CmdUrbs)); 2189 2190 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2191 usb_sndbulkpipe(edge_serial->serial->dev, 2192 edge_serial->bulk_out_endpoint), 2193 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2194 2195 edge_port->commandPending = true; 2196 status = usb_submit_urb(urb, GFP_ATOMIC); 2197 2198 if (status) { 2199 /* something went wrong */ 2200 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", 2201 __func__, status); 2202 usb_kill_urb(urb); 2203 usb_free_urb(urb); 2204 atomic_dec(&CmdUrbs); 2205 return status; 2206 } 2207 2208 #if 0 2209 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2210 2211 if (edge_port->commandPending) { 2212 /* command timed out */ 2213 dev_dbg(dev, "%s - command timed out\n", __func__); 2214 status = -EINVAL; 2215 } 2216 #endif 2217 return status; 2218 } 2219 2220 2221 /***************************************************************************** 2222 * send_cmd_write_baud_rate 2223 * this function sends the proper command to change the baud rate of the 2224 * specified port. 2225 *****************************************************************************/ 2226 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2227 int baudRate) 2228 { 2229 struct edgeport_serial *edge_serial = 2230 usb_get_serial_data(edge_port->port->serial); 2231 struct device *dev = &edge_port->port->dev; 2232 unsigned char *cmdBuffer; 2233 unsigned char *currCmd; 2234 int cmdLen = 0; 2235 int divisor; 2236 int status; 2237 u32 number = edge_port->port->port_number; 2238 2239 if (edge_serial->is_epic && 2240 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2241 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n", 2242 baudRate); 2243 return 0; 2244 } 2245 2246 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate); 2247 2248 status = calc_baud_rate_divisor(dev, baudRate, &divisor); 2249 if (status) { 2250 dev_err(dev, "%s - bad baud rate\n", __func__); 2251 return status; 2252 } 2253 2254 /* Alloc memory for the string of commands. */ 2255 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2256 if (!cmdBuffer) 2257 return -ENOMEM; 2258 2259 currCmd = cmdBuffer; 2260 2261 /* Enable access to divisor latch */ 2262 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2263 2264 /* Write the divisor itself */ 2265 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2266 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2267 2268 /* Restore original value to disable access to divisor latch */ 2269 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2270 edge_port->shadowLCR); 2271 2272 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2273 if (status) { 2274 /* something bad happened, let's free up the memory */ 2275 kfree(cmdBuffer); 2276 } 2277 2278 return status; 2279 } 2280 2281 2282 /***************************************************************************** 2283 * calc_baud_rate_divisor 2284 * this function calculates the proper baud rate divisor for the specified 2285 * baud rate. 2286 *****************************************************************************/ 2287 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor) 2288 { 2289 int i; 2290 __u16 custom; 2291 2292 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2293 if (divisor_table[i].BaudRate == baudrate) { 2294 *divisor = divisor_table[i].Divisor; 2295 return 0; 2296 } 2297 } 2298 2299 /* We have tried all of the standard baud rates 2300 * lets try to calculate the divisor for this baud rate 2301 * Make sure the baud rate is reasonable */ 2302 if (baudrate > 50 && baudrate < 230400) { 2303 /* get divisor */ 2304 custom = (__u16)((230400L + baudrate/2) / baudrate); 2305 2306 *divisor = custom; 2307 2308 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom); 2309 return 0; 2310 } 2311 2312 return -1; 2313 } 2314 2315 2316 /***************************************************************************** 2317 * send_cmd_write_uart_register 2318 * this function builds up a uart register message and sends to the device. 2319 *****************************************************************************/ 2320 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2321 __u8 regNum, __u8 regValue) 2322 { 2323 struct edgeport_serial *edge_serial = 2324 usb_get_serial_data(edge_port->port->serial); 2325 struct device *dev = &edge_port->port->dev; 2326 unsigned char *cmdBuffer; 2327 unsigned char *currCmd; 2328 unsigned long cmdLen = 0; 2329 int status; 2330 2331 dev_dbg(dev, "%s - write to %s register 0x%02x\n", 2332 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2333 2334 if (edge_serial->is_epic && 2335 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2336 regNum == MCR) { 2337 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n"); 2338 return 0; 2339 } 2340 2341 if (edge_serial->is_epic && 2342 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2343 regNum == LCR) { 2344 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n"); 2345 return 0; 2346 } 2347 2348 /* Alloc memory for the string of commands. */ 2349 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2350 if (cmdBuffer == NULL) 2351 return -ENOMEM; 2352 2353 currCmd = cmdBuffer; 2354 2355 /* Build a cmd in the buffer to write the given register */ 2356 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number, 2357 regNum, regValue); 2358 2359 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2360 if (status) { 2361 /* something bad happened, let's free up the memory */ 2362 kfree(cmdBuffer); 2363 } 2364 2365 return status; 2366 } 2367 2368 2369 /***************************************************************************** 2370 * change_port_settings 2371 * This routine is called to set the UART on the device to match the 2372 * specified new settings. 2373 *****************************************************************************/ 2374 2375 static void change_port_settings(struct tty_struct *tty, 2376 struct edgeport_port *edge_port, struct ktermios *old_termios) 2377 { 2378 struct device *dev = &edge_port->port->dev; 2379 struct edgeport_serial *edge_serial = 2380 usb_get_serial_data(edge_port->port->serial); 2381 int baud; 2382 unsigned cflag; 2383 __u8 mask = 0xff; 2384 __u8 lData; 2385 __u8 lParity; 2386 __u8 lStop; 2387 __u8 rxFlow; 2388 __u8 txFlow; 2389 int status; 2390 2391 if (!edge_port->open && 2392 !edge_port->openPending) { 2393 dev_dbg(dev, "%s - port not opened\n", __func__); 2394 return; 2395 } 2396 2397 cflag = tty->termios.c_cflag; 2398 2399 switch (cflag & CSIZE) { 2400 case CS5: 2401 lData = LCR_BITS_5; mask = 0x1f; 2402 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2403 break; 2404 case CS6: 2405 lData = LCR_BITS_6; mask = 0x3f; 2406 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2407 break; 2408 case CS7: 2409 lData = LCR_BITS_7; mask = 0x7f; 2410 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2411 break; 2412 default: 2413 case CS8: 2414 lData = LCR_BITS_8; 2415 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2416 break; 2417 } 2418 2419 lParity = LCR_PAR_NONE; 2420 if (cflag & PARENB) { 2421 if (cflag & CMSPAR) { 2422 if (cflag & PARODD) { 2423 lParity = LCR_PAR_MARK; 2424 dev_dbg(dev, "%s - parity = mark\n", __func__); 2425 } else { 2426 lParity = LCR_PAR_SPACE; 2427 dev_dbg(dev, "%s - parity = space\n", __func__); 2428 } 2429 } else if (cflag & PARODD) { 2430 lParity = LCR_PAR_ODD; 2431 dev_dbg(dev, "%s - parity = odd\n", __func__); 2432 } else { 2433 lParity = LCR_PAR_EVEN; 2434 dev_dbg(dev, "%s - parity = even\n", __func__); 2435 } 2436 } else { 2437 dev_dbg(dev, "%s - parity = none\n", __func__); 2438 } 2439 2440 if (cflag & CSTOPB) { 2441 lStop = LCR_STOP_2; 2442 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2443 } else { 2444 lStop = LCR_STOP_1; 2445 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2446 } 2447 2448 /* figure out the flow control settings */ 2449 rxFlow = txFlow = 0x00; 2450 if (cflag & CRTSCTS) { 2451 rxFlow |= IOSP_RX_FLOW_RTS; 2452 txFlow |= IOSP_TX_FLOW_CTS; 2453 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2454 } else { 2455 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2456 } 2457 2458 /* if we are implementing XON/XOFF, set the start and stop character 2459 in the device */ 2460 if (I_IXOFF(tty) || I_IXON(tty)) { 2461 unsigned char stop_char = STOP_CHAR(tty); 2462 unsigned char start_char = START_CHAR(tty); 2463 2464 if (!edge_serial->is_epic || 2465 edge_serial->epic_descriptor.Supports.IOSPSetXChar) { 2466 send_iosp_ext_cmd(edge_port, 2467 IOSP_CMD_SET_XON_CHAR, start_char); 2468 send_iosp_ext_cmd(edge_port, 2469 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2470 } 2471 2472 /* if we are implementing INBOUND XON/XOFF */ 2473 if (I_IXOFF(tty)) { 2474 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2475 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2476 __func__, start_char, stop_char); 2477 } else { 2478 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2479 } 2480 2481 /* if we are implementing OUTBOUND XON/XOFF */ 2482 if (I_IXON(tty)) { 2483 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2484 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2485 __func__, start_char, stop_char); 2486 } else { 2487 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2488 } 2489 } 2490 2491 /* Set flow control to the configured value */ 2492 if (!edge_serial->is_epic || 2493 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow) 2494 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2495 if (!edge_serial->is_epic || 2496 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow) 2497 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2498 2499 2500 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2501 edge_port->shadowLCR |= (lData | lParity | lStop); 2502 2503 edge_port->validDataMask = mask; 2504 2505 /* Send the updated LCR value to the EdgePort */ 2506 status = send_cmd_write_uart_register(edge_port, LCR, 2507 edge_port->shadowLCR); 2508 if (status != 0) 2509 return; 2510 2511 /* set up the MCR register and send it to the EdgePort */ 2512 edge_port->shadowMCR = MCR_MASTER_IE; 2513 if (cflag & CBAUD) 2514 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2515 2516 status = send_cmd_write_uart_register(edge_port, MCR, 2517 edge_port->shadowMCR); 2518 if (status != 0) 2519 return; 2520 2521 /* Determine divisor based on baud rate */ 2522 baud = tty_get_baud_rate(tty); 2523 if (!baud) { 2524 /* pick a default, any default... */ 2525 baud = 9600; 2526 } 2527 2528 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 2529 status = send_cmd_write_baud_rate(edge_port, baud); 2530 if (status == -1) { 2531 /* Speed change was not possible - put back the old speed */ 2532 baud = tty_termios_baud_rate(old_termios); 2533 tty_encode_baud_rate(tty, baud, baud); 2534 } 2535 } 2536 2537 2538 /**************************************************************************** 2539 * unicode_to_ascii 2540 * Turns a string from Unicode into ASCII. 2541 * Doesn't do a good job with any characters that are outside the normal 2542 * ASCII range, but it's only for debugging... 2543 * NOTE: expects the unicode in LE format 2544 ****************************************************************************/ 2545 static void unicode_to_ascii(char *string, int buflen, 2546 __le16 *unicode, int unicode_size) 2547 { 2548 int i; 2549 2550 if (buflen <= 0) /* never happens, but... */ 2551 return; 2552 --buflen; /* space for nul */ 2553 2554 for (i = 0; i < unicode_size; i++) { 2555 if (i >= buflen) 2556 break; 2557 string[i] = (char)(le16_to_cpu(unicode[i])); 2558 } 2559 string[i] = 0x00; 2560 } 2561 2562 2563 /**************************************************************************** 2564 * get_manufacturing_desc 2565 * reads in the manufacturing descriptor and stores it into the serial 2566 * structure. 2567 ****************************************************************************/ 2568 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2569 { 2570 struct device *dev = &edge_serial->serial->dev->dev; 2571 int response; 2572 2573 dev_dbg(dev, "getting manufacturer descriptor\n"); 2574 2575 response = rom_read(edge_serial->serial, 2576 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2577 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2578 EDGE_MANUF_DESC_LEN, 2579 (__u8 *)(&edge_serial->manuf_descriptor)); 2580 2581 if (response < 1) 2582 dev_err(dev, "error in getting manufacturer descriptor\n"); 2583 else { 2584 char string[30]; 2585 dev_dbg(dev, "**Manufacturer Descriptor\n"); 2586 dev_dbg(dev, " RomSize: %dK\n", 2587 edge_serial->manuf_descriptor.RomSize); 2588 dev_dbg(dev, " RamSize: %dK\n", 2589 edge_serial->manuf_descriptor.RamSize); 2590 dev_dbg(dev, " CpuRev: %d\n", 2591 edge_serial->manuf_descriptor.CpuRev); 2592 dev_dbg(dev, " BoardRev: %d\n", 2593 edge_serial->manuf_descriptor.BoardRev); 2594 dev_dbg(dev, " NumPorts: %d\n", 2595 edge_serial->manuf_descriptor.NumPorts); 2596 dev_dbg(dev, " DescDate: %d/%d/%d\n", 2597 edge_serial->manuf_descriptor.DescDate[0], 2598 edge_serial->manuf_descriptor.DescDate[1], 2599 edge_serial->manuf_descriptor.DescDate[2]+1900); 2600 unicode_to_ascii(string, sizeof(string), 2601 edge_serial->manuf_descriptor.SerialNumber, 2602 edge_serial->manuf_descriptor.SerNumLength/2); 2603 dev_dbg(dev, " SerialNumber: %s\n", string); 2604 unicode_to_ascii(string, sizeof(string), 2605 edge_serial->manuf_descriptor.AssemblyNumber, 2606 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2607 dev_dbg(dev, " AssemblyNumber: %s\n", string); 2608 unicode_to_ascii(string, sizeof(string), 2609 edge_serial->manuf_descriptor.OemAssyNumber, 2610 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2611 dev_dbg(dev, " OemAssyNumber: %s\n", string); 2612 dev_dbg(dev, " UartType: %d\n", 2613 edge_serial->manuf_descriptor.UartType); 2614 dev_dbg(dev, " IonPid: %d\n", 2615 edge_serial->manuf_descriptor.IonPid); 2616 dev_dbg(dev, " IonConfig: %d\n", 2617 edge_serial->manuf_descriptor.IonConfig); 2618 } 2619 } 2620 2621 2622 /**************************************************************************** 2623 * get_boot_desc 2624 * reads in the bootloader descriptor and stores it into the serial 2625 * structure. 2626 ****************************************************************************/ 2627 static void get_boot_desc(struct edgeport_serial *edge_serial) 2628 { 2629 struct device *dev = &edge_serial->serial->dev->dev; 2630 int response; 2631 2632 dev_dbg(dev, "getting boot descriptor\n"); 2633 2634 response = rom_read(edge_serial->serial, 2635 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2636 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2637 EDGE_BOOT_DESC_LEN, 2638 (__u8 *)(&edge_serial->boot_descriptor)); 2639 2640 if (response < 1) 2641 dev_err(dev, "error in getting boot descriptor\n"); 2642 else { 2643 dev_dbg(dev, "**Boot Descriptor:\n"); 2644 dev_dbg(dev, " BootCodeLength: %d\n", 2645 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2646 dev_dbg(dev, " MajorVersion: %d\n", 2647 edge_serial->boot_descriptor.MajorVersion); 2648 dev_dbg(dev, " MinorVersion: %d\n", 2649 edge_serial->boot_descriptor.MinorVersion); 2650 dev_dbg(dev, " BuildNumber: %d\n", 2651 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2652 dev_dbg(dev, " Capabilities: 0x%x\n", 2653 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2654 dev_dbg(dev, " UConfig0: %d\n", 2655 edge_serial->boot_descriptor.UConfig0); 2656 dev_dbg(dev, " UConfig1: %d\n", 2657 edge_serial->boot_descriptor.UConfig1); 2658 } 2659 } 2660 2661 2662 /**************************************************************************** 2663 * load_application_firmware 2664 * This is called to load the application firmware to the device 2665 ****************************************************************************/ 2666 static void load_application_firmware(struct edgeport_serial *edge_serial) 2667 { 2668 struct device *dev = &edge_serial->serial->dev->dev; 2669 const struct ihex_binrec *rec; 2670 const struct firmware *fw; 2671 const char *fw_name; 2672 const char *fw_info; 2673 int response; 2674 __u32 Operaddr; 2675 __u16 build; 2676 2677 switch (edge_serial->product_info.iDownloadFile) { 2678 case EDGE_DOWNLOAD_FILE_I930: 2679 fw_info = "downloading firmware version (930)"; 2680 fw_name = "edgeport/down.fw"; 2681 break; 2682 2683 case EDGE_DOWNLOAD_FILE_80251: 2684 fw_info = "downloading firmware version (80251)"; 2685 fw_name = "edgeport/down2.fw"; 2686 break; 2687 2688 case EDGE_DOWNLOAD_FILE_NONE: 2689 dev_dbg(dev, "No download file specified, skipping download\n"); 2690 return; 2691 2692 default: 2693 return; 2694 } 2695 2696 response = request_ihex_firmware(&fw, fw_name, 2697 &edge_serial->serial->dev->dev); 2698 if (response) { 2699 dev_err(dev, "Failed to load image \"%s\" err %d\n", 2700 fw_name, response); 2701 return; 2702 } 2703 2704 rec = (const struct ihex_binrec *)fw->data; 2705 build = (rec->data[2] << 8) | rec->data[3]; 2706 2707 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build); 2708 2709 edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; 2710 edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; 2711 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2712 2713 for (rec = ihex_next_binrec(rec); rec; 2714 rec = ihex_next_binrec(rec)) { 2715 Operaddr = be32_to_cpu(rec->addr); 2716 response = sram_write(edge_serial->serial, 2717 Operaddr >> 16, 2718 Operaddr & 0xFFFF, 2719 be16_to_cpu(rec->len), 2720 &rec->data[0]); 2721 if (response < 0) { 2722 dev_err(&edge_serial->serial->dev->dev, 2723 "sram_write failed (%x, %x, %d)\n", 2724 Operaddr >> 16, Operaddr & 0xFFFF, 2725 be16_to_cpu(rec->len)); 2726 break; 2727 } 2728 } 2729 2730 dev_dbg(dev, "sending exec_dl_code\n"); 2731 response = usb_control_msg (edge_serial->serial->dev, 2732 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2733 USB_REQUEST_ION_EXEC_DL_CODE, 2734 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2735 2736 release_firmware(fw); 2737 } 2738 2739 2740 /**************************************************************************** 2741 * edge_startup 2742 ****************************************************************************/ 2743 static int edge_startup(struct usb_serial *serial) 2744 { 2745 struct edgeport_serial *edge_serial; 2746 struct usb_device *dev; 2747 struct device *ddev = &serial->dev->dev; 2748 int i; 2749 int response; 2750 bool interrupt_in_found; 2751 bool bulk_in_found; 2752 bool bulk_out_found; 2753 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2754 EDGE_COMPATIBILITY_MASK1, 2755 EDGE_COMPATIBILITY_MASK2 }; 2756 2757 dev = serial->dev; 2758 2759 /* create our private serial structure */ 2760 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2761 if (!edge_serial) 2762 return -ENOMEM; 2763 2764 spin_lock_init(&edge_serial->es_lock); 2765 edge_serial->serial = serial; 2766 usb_set_serial_data(serial, edge_serial); 2767 2768 /* get the name for the device from the device */ 2769 i = usb_string(dev, dev->descriptor.iManufacturer, 2770 &edge_serial->name[0], MAX_NAME_LEN+1); 2771 if (i < 0) 2772 i = 0; 2773 edge_serial->name[i++] = ' '; 2774 usb_string(dev, dev->descriptor.iProduct, 2775 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2776 2777 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2778 2779 /* Read the epic descriptor */ 2780 if (get_epic_descriptor(edge_serial) <= 0) { 2781 /* memcpy descriptor to Supports structures */ 2782 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2783 sizeof(struct edge_compatibility_bits)); 2784 2785 /* get the manufacturing descriptor for this device */ 2786 get_manufacturing_desc(edge_serial); 2787 2788 /* get the boot descriptor */ 2789 get_boot_desc(edge_serial); 2790 2791 get_product_info(edge_serial); 2792 } 2793 2794 /* set the number of ports from the manufacturing description */ 2795 /* serial->num_ports = serial->product_info.NumPorts; */ 2796 if ((!edge_serial->is_epic) && 2797 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2798 dev_warn(ddev, 2799 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n", 2800 edge_serial->product_info.NumPorts, 2801 serial->num_ports); 2802 } 2803 2804 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies); 2805 2806 /* If not an EPiC device */ 2807 if (!edge_serial->is_epic) { 2808 /* now load the application firmware into this device */ 2809 load_application_firmware(edge_serial); 2810 2811 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies); 2812 2813 /* Check current Edgeport EEPROM and update if necessary */ 2814 update_edgeport_E2PROM(edge_serial); 2815 2816 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies); 2817 2818 /* set the configuration to use #1 */ 2819 /* dev_dbg(ddev, "set_configuration 1\n"); */ 2820 /* usb_set_configuration (dev, 1); */ 2821 } 2822 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n", 2823 edge_serial->product_info.FirmwareMajorVersion, 2824 edge_serial->product_info.FirmwareMinorVersion, 2825 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 2826 2827 /* we set up the pointers to the endpoints in the edge_open function, 2828 * as the structures aren't created yet. */ 2829 2830 response = 0; 2831 2832 if (edge_serial->is_epic) { 2833 /* EPIC thing, set up our interrupt polling now and our read 2834 * urb, so that the device knows it really is connected. */ 2835 interrupt_in_found = bulk_in_found = bulk_out_found = false; 2836 for (i = 0; i < serial->interface->altsetting[0] 2837 .desc.bNumEndpoints; ++i) { 2838 struct usb_endpoint_descriptor *endpoint; 2839 int buffer_size; 2840 2841 endpoint = &serial->interface->altsetting[0]. 2842 endpoint[i].desc; 2843 buffer_size = usb_endpoint_maxp(endpoint); 2844 if (!interrupt_in_found && 2845 (usb_endpoint_is_int_in(endpoint))) { 2846 /* we found a interrupt in endpoint */ 2847 dev_dbg(ddev, "found interrupt in\n"); 2848 2849 /* not set up yet, so do it now */ 2850 edge_serial->interrupt_read_urb = 2851 usb_alloc_urb(0, GFP_KERNEL); 2852 if (!edge_serial->interrupt_read_urb) 2853 return -ENOMEM; 2854 2855 edge_serial->interrupt_in_buffer = 2856 kmalloc(buffer_size, GFP_KERNEL); 2857 if (!edge_serial->interrupt_in_buffer) { 2858 usb_free_urb(edge_serial->interrupt_read_urb); 2859 return -ENOMEM; 2860 } 2861 edge_serial->interrupt_in_endpoint = 2862 endpoint->bEndpointAddress; 2863 2864 /* set up our interrupt urb */ 2865 usb_fill_int_urb( 2866 edge_serial->interrupt_read_urb, 2867 dev, 2868 usb_rcvintpipe(dev, 2869 endpoint->bEndpointAddress), 2870 edge_serial->interrupt_in_buffer, 2871 buffer_size, 2872 edge_interrupt_callback, 2873 edge_serial, 2874 endpoint->bInterval); 2875 2876 interrupt_in_found = true; 2877 } 2878 2879 if (!bulk_in_found && 2880 (usb_endpoint_is_bulk_in(endpoint))) { 2881 /* we found a bulk in endpoint */ 2882 dev_dbg(ddev, "found bulk in\n"); 2883 2884 /* not set up yet, so do it now */ 2885 edge_serial->read_urb = 2886 usb_alloc_urb(0, GFP_KERNEL); 2887 if (!edge_serial->read_urb) 2888 return -ENOMEM; 2889 2890 edge_serial->bulk_in_buffer = 2891 kmalloc(buffer_size, GFP_KERNEL); 2892 if (!edge_serial->bulk_in_buffer) { 2893 usb_free_urb(edge_serial->read_urb); 2894 return -ENOMEM; 2895 } 2896 edge_serial->bulk_in_endpoint = 2897 endpoint->bEndpointAddress; 2898 2899 /* set up our bulk in urb */ 2900 usb_fill_bulk_urb(edge_serial->read_urb, dev, 2901 usb_rcvbulkpipe(dev, 2902 endpoint->bEndpointAddress), 2903 edge_serial->bulk_in_buffer, 2904 usb_endpoint_maxp(endpoint), 2905 edge_bulk_in_callback, 2906 edge_serial); 2907 bulk_in_found = true; 2908 } 2909 2910 if (!bulk_out_found && 2911 (usb_endpoint_is_bulk_out(endpoint))) { 2912 /* we found a bulk out endpoint */ 2913 dev_dbg(ddev, "found bulk out\n"); 2914 edge_serial->bulk_out_endpoint = 2915 endpoint->bEndpointAddress; 2916 bulk_out_found = true; 2917 } 2918 } 2919 2920 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 2921 dev_err(ddev, "Error - the proper endpoints were not found!\n"); 2922 return -ENODEV; 2923 } 2924 2925 /* start interrupt read for this edgeport this interrupt will 2926 * continue as long as the edgeport is connected */ 2927 response = usb_submit_urb(edge_serial->interrupt_read_urb, 2928 GFP_KERNEL); 2929 if (response) 2930 dev_err(ddev, "%s - Error %d submitting control urb\n", 2931 __func__, response); 2932 } 2933 return response; 2934 } 2935 2936 2937 /**************************************************************************** 2938 * edge_disconnect 2939 * This function is called whenever the device is removed from the usb bus. 2940 ****************************************************************************/ 2941 static void edge_disconnect(struct usb_serial *serial) 2942 { 2943 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2944 2945 /* stop reads and writes on all ports */ 2946 /* free up our endpoint stuff */ 2947 if (edge_serial->is_epic) { 2948 usb_kill_urb(edge_serial->interrupt_read_urb); 2949 usb_free_urb(edge_serial->interrupt_read_urb); 2950 kfree(edge_serial->interrupt_in_buffer); 2951 2952 usb_kill_urb(edge_serial->read_urb); 2953 usb_free_urb(edge_serial->read_urb); 2954 kfree(edge_serial->bulk_in_buffer); 2955 } 2956 } 2957 2958 2959 /**************************************************************************** 2960 * edge_release 2961 * This function is called when the device structure is deallocated. 2962 ****************************************************************************/ 2963 static void edge_release(struct usb_serial *serial) 2964 { 2965 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2966 2967 kfree(edge_serial); 2968 } 2969 2970 static int edge_port_probe(struct usb_serial_port *port) 2971 { 2972 struct edgeport_port *edge_port; 2973 2974 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 2975 if (!edge_port) 2976 return -ENOMEM; 2977 2978 spin_lock_init(&edge_port->ep_lock); 2979 edge_port->port = port; 2980 2981 usb_set_serial_port_data(port, edge_port); 2982 2983 return 0; 2984 } 2985 2986 static int edge_port_remove(struct usb_serial_port *port) 2987 { 2988 struct edgeport_port *edge_port; 2989 2990 edge_port = usb_get_serial_port_data(port); 2991 kfree(edge_port); 2992 2993 return 0; 2994 } 2995 2996 module_usb_serial_driver(serial_drivers, id_table_combined); 2997 2998 MODULE_AUTHOR(DRIVER_AUTHOR); 2999 MODULE_DESCRIPTION(DRIVER_DESC); 3000 MODULE_LICENSE("GPL"); 3001 MODULE_FIRMWARE("edgeport/boot.fw"); 3002 MODULE_FIRMWARE("edgeport/boot2.fw"); 3003 MODULE_FIRMWARE("edgeport/down.fw"); 3004 MODULE_FIRMWARE("edgeport/down2.fw"); 3005