1 /* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * Edgeport/4 14 * Edgeport/4t 15 * Edgeport/2 16 * Edgeport/4i 17 * Edgeport/2i 18 * Edgeport/421 19 * Edgeport/21 20 * Rapidport/4 21 * Edgeport/8 22 * Edgeport/2D8 23 * Edgeport/4D8 24 * Edgeport/8i 25 * 26 * For questions or problems with this driver, contact Inside Out 27 * Networks technical support, or Peter Berger <pberger@brimson.com>, 28 * or Al Borchers <alborchers@steinerpoint.com>. 29 * 30 */ 31 32 #include <linux/kernel.h> 33 #include <linux/jiffies.h> 34 #include <linux/errno.h> 35 #include <linux/init.h> 36 #include <linux/slab.h> 37 #include <linux/tty.h> 38 #include <linux/tty_driver.h> 39 #include <linux/tty_flip.h> 40 #include <linux/module.h> 41 #include <linux/spinlock.h> 42 #include <linux/serial.h> 43 #include <linux/ioctl.h> 44 #include <linux/wait.h> 45 #include <linux/firmware.h> 46 #include <linux/ihex.h> 47 #include <linux/uaccess.h> 48 #include <linux/usb.h> 49 #include <linux/usb/serial.h> 50 #include "io_edgeport.h" 51 #include "io_ionsp.h" /* info for the iosp messages */ 52 #include "io_16654.h" /* 16654 UART defines */ 53 54 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 55 #define DRIVER_DESC "Edgeport USB Serial Driver" 56 57 #define MAX_NAME_LEN 64 58 59 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 60 61 /* receive port state */ 62 enum RXSTATE { 63 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 64 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 65 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 66 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 67 }; 68 69 70 /* Transmit Fifo 71 * This Transmit queue is an extension of the edgeport Rx buffer. 72 * The maximum amount of data buffered in both the edgeport 73 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 74 */ 75 struct TxFifo { 76 unsigned int head; /* index to head pointer (write) */ 77 unsigned int tail; /* index to tail pointer (read) */ 78 unsigned int count; /* Bytes in queue */ 79 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 80 unsigned char *fifo; /* allocated Buffer */ 81 }; 82 83 /* This structure holds all of the local port information */ 84 struct edgeport_port { 85 __u16 txCredits; /* our current credits for this port */ 86 __u16 maxTxCredits; /* the max size of the port */ 87 88 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 89 struct urb *write_urb; /* write URB for this port */ 90 bool write_in_progress; /* 'true' while a write URB is outstanding */ 91 spinlock_t ep_lock; 92 93 __u8 shadowLCR; /* last LCR value received */ 94 __u8 shadowMCR; /* last MCR value received */ 95 __u8 shadowMSR; /* last MSR value received */ 96 __u8 shadowLSR; /* last LSR value received */ 97 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 98 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 99 __u8 validDataMask; 100 __u32 baudRate; 101 102 bool open; 103 bool openPending; 104 bool commandPending; 105 bool closePending; 106 bool chaseResponsePending; 107 108 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 109 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 110 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 111 112 struct usb_serial_port *port; /* loop back to the owner of this object */ 113 }; 114 115 116 /* This structure holds all of the individual device information */ 117 struct edgeport_serial { 118 char name[MAX_NAME_LEN+2]; /* string name of this device */ 119 120 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 121 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 122 struct edgeport_product_info product_info; /* Product Info */ 123 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 124 int is_epic; /* flag if EPiC device or not */ 125 126 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 127 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 128 struct urb *interrupt_read_urb; /* our interrupt urb */ 129 130 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 131 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 132 struct urb *read_urb; /* our bulk read urb */ 133 bool read_in_progress; 134 spinlock_t es_lock; 135 136 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 137 138 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 139 140 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 141 __u8 rxHeader1; /* receive header byte 1 */ 142 __u8 rxHeader2; /* receive header byte 2 */ 143 __u8 rxHeader3; /* receive header byte 3 */ 144 __u8 rxPort; /* the port that we are currently receiving data for */ 145 __u8 rxStatusCode; /* the receive status code */ 146 __u8 rxStatusParam; /* the receive status paramater */ 147 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 148 struct usb_serial *serial; /* loop back to the owner of this object */ 149 }; 150 151 /* baud rate information */ 152 struct divisor_table_entry { 153 __u32 BaudRate; 154 __u16 Divisor; 155 }; 156 157 /* 158 * Define table of divisors for Rev A EdgePort/4 hardware 159 * These assume a 3.6864MHz crystal, the standard /16, and 160 * MCR.7 = 0. 161 */ 162 163 static const struct divisor_table_entry divisor_table[] = { 164 { 50, 4608}, 165 { 75, 3072}, 166 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 167 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 168 { 150, 1536}, 169 { 300, 768}, 170 { 600, 384}, 171 { 1200, 192}, 172 { 1800, 128}, 173 { 2400, 96}, 174 { 4800, 48}, 175 { 7200, 32}, 176 { 9600, 24}, 177 { 14400, 16}, 178 { 19200, 12}, 179 { 38400, 6}, 180 { 57600, 4}, 181 { 115200, 2}, 182 { 230400, 1}, 183 }; 184 185 /* Number of outstanding Command Write Urbs */ 186 static atomic_t CmdUrbs = ATOMIC_INIT(0); 187 188 189 /* local function prototypes */ 190 191 /* function prototypes for all URB callbacks */ 192 static void edge_interrupt_callback(struct urb *urb); 193 static void edge_bulk_in_callback(struct urb *urb); 194 static void edge_bulk_out_data_callback(struct urb *urb); 195 static void edge_bulk_out_cmd_callback(struct urb *urb); 196 197 /* function prototypes for the usbserial callbacks */ 198 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); 199 static void edge_close(struct usb_serial_port *port); 200 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 201 const unsigned char *buf, int count); 202 static int edge_write_room(struct tty_struct *tty); 203 static int edge_chars_in_buffer(struct tty_struct *tty); 204 static void edge_throttle(struct tty_struct *tty); 205 static void edge_unthrottle(struct tty_struct *tty); 206 static void edge_set_termios(struct tty_struct *tty, 207 struct usb_serial_port *port, 208 struct ktermios *old_termios); 209 static int edge_ioctl(struct tty_struct *tty, 210 unsigned int cmd, unsigned long arg); 211 static void edge_break(struct tty_struct *tty, int break_state); 212 static int edge_tiocmget(struct tty_struct *tty); 213 static int edge_tiocmset(struct tty_struct *tty, 214 unsigned int set, unsigned int clear); 215 static int edge_startup(struct usb_serial *serial); 216 static void edge_disconnect(struct usb_serial *serial); 217 static void edge_release(struct usb_serial *serial); 218 static int edge_port_probe(struct usb_serial_port *port); 219 static int edge_port_remove(struct usb_serial_port *port); 220 221 #include "io_tables.h" /* all of the devices that this driver supports */ 222 223 /* function prototypes for all of our local functions */ 224 225 static void process_rcvd_data(struct edgeport_serial *edge_serial, 226 unsigned char *buffer, __u16 bufferLength); 227 static void process_rcvd_status(struct edgeport_serial *edge_serial, 228 __u8 byte2, __u8 byte3); 229 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 230 int length); 231 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 232 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 233 __u8 lsr, __u8 data); 234 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 235 __u8 param); 236 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor); 237 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 238 int baudRate); 239 static void change_port_settings(struct tty_struct *tty, 240 struct edgeport_port *edge_port, 241 struct ktermios *old_termios); 242 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 243 __u8 regNum, __u8 regValue); 244 static int write_cmd_usb(struct edgeport_port *edge_port, 245 unsigned char *buffer, int writeLength); 246 static void send_more_port_data(struct edgeport_serial *edge_serial, 247 struct edgeport_port *edge_port); 248 249 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 250 __u16 length, const __u8 *data); 251 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 252 __u16 length, __u8 *data); 253 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 254 __u16 length, const __u8 *data); 255 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 256 static void get_boot_desc(struct edgeport_serial *edge_serial); 257 static void load_application_firmware(struct edgeport_serial *edge_serial); 258 259 static void unicode_to_ascii(char *string, int buflen, 260 __le16 *unicode, int unicode_size); 261 262 263 /* ************************************************************************ */ 264 /* ************************************************************************ */ 265 /* ************************************************************************ */ 266 /* ************************************************************************ */ 267 268 /************************************************************************ 269 * * 270 * update_edgeport_E2PROM() Compare current versions of * 271 * Boot ROM and Manufacture * 272 * Descriptors with versions * 273 * embedded in this driver * 274 * * 275 ************************************************************************/ 276 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 277 { 278 struct device *dev = &edge_serial->serial->dev->dev; 279 __u32 BootCurVer; 280 __u32 BootNewVer; 281 __u8 BootMajorVersion; 282 __u8 BootMinorVersion; 283 __u16 BootBuildNumber; 284 __u32 Bootaddr; 285 const struct ihex_binrec *rec; 286 const struct firmware *fw; 287 const char *fw_name; 288 int response; 289 290 switch (edge_serial->product_info.iDownloadFile) { 291 case EDGE_DOWNLOAD_FILE_I930: 292 fw_name = "edgeport/boot.fw"; 293 break; 294 case EDGE_DOWNLOAD_FILE_80251: 295 fw_name = "edgeport/boot2.fw"; 296 break; 297 default: 298 return; 299 } 300 301 response = request_ihex_firmware(&fw, fw_name, 302 &edge_serial->serial->dev->dev); 303 if (response) { 304 dev_err(dev, "Failed to load image \"%s\" err %d\n", 305 fw_name, response); 306 return; 307 } 308 309 rec = (const struct ihex_binrec *)fw->data; 310 BootMajorVersion = rec->data[0]; 311 BootMinorVersion = rec->data[1]; 312 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 313 314 /* Check Boot Image Version */ 315 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 316 (edge_serial->boot_descriptor.MinorVersion << 16) + 317 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 318 319 BootNewVer = (BootMajorVersion << 24) + 320 (BootMinorVersion << 16) + 321 BootBuildNumber; 322 323 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n", 324 edge_serial->boot_descriptor.MajorVersion, 325 edge_serial->boot_descriptor.MinorVersion, 326 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 327 328 329 if (BootNewVer > BootCurVer) { 330 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n", 331 edge_serial->boot_descriptor.MajorVersion, 332 edge_serial->boot_descriptor.MinorVersion, 333 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 334 BootMajorVersion, BootMinorVersion, BootBuildNumber); 335 336 dev_dbg(dev, "Downloading new Boot Image\n"); 337 338 for (rec = ihex_next_binrec(rec); rec; 339 rec = ihex_next_binrec(rec)) { 340 Bootaddr = be32_to_cpu(rec->addr); 341 response = rom_write(edge_serial->serial, 342 Bootaddr >> 16, 343 Bootaddr & 0xFFFF, 344 be16_to_cpu(rec->len), 345 &rec->data[0]); 346 if (response < 0) { 347 dev_err(&edge_serial->serial->dev->dev, 348 "rom_write failed (%x, %x, %d)\n", 349 Bootaddr >> 16, Bootaddr & 0xFFFF, 350 be16_to_cpu(rec->len)); 351 break; 352 } 353 } 354 } else { 355 dev_dbg(dev, "Boot Image -- already up to date\n"); 356 } 357 release_firmware(fw); 358 } 359 360 #if 0 361 /************************************************************************ 362 * 363 * Get string descriptor from device 364 * 365 ************************************************************************/ 366 static int get_string_desc(struct usb_device *dev, int Id, 367 struct usb_string_descriptor **pRetDesc) 368 { 369 struct usb_string_descriptor StringDesc; 370 struct usb_string_descriptor *pStringDesc; 371 372 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id); 373 374 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 375 sizeof(StringDesc))) 376 return 0; 377 378 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 379 if (!pStringDesc) 380 return -1; 381 382 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 383 StringDesc.bLength)) { 384 kfree(pStringDesc); 385 return -1; 386 } 387 388 *pRetDesc = pStringDesc; 389 return 0; 390 } 391 #endif 392 393 static void dump_product_info(struct edgeport_serial *edge_serial, 394 struct edgeport_product_info *product_info) 395 { 396 struct device *dev = &edge_serial->serial->dev->dev; 397 398 /* Dump Product Info structure */ 399 dev_dbg(dev, "**Product Information:\n"); 400 dev_dbg(dev, " ProductId %x\n", product_info->ProductId); 401 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts); 402 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer); 403 dev_dbg(dev, " IsServer %d\n", product_info->IsServer); 404 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232); 405 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422); 406 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485); 407 dev_dbg(dev, " RomSize %d\n", product_info->RomSize); 408 dev_dbg(dev, " RamSize %d\n", product_info->RamSize); 409 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev); 410 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev); 411 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n", 412 product_info->BootMajorVersion, 413 product_info->BootMinorVersion, 414 le16_to_cpu(product_info->BootBuildNumber)); 415 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n", 416 product_info->FirmwareMajorVersion, 417 product_info->FirmwareMinorVersion, 418 le16_to_cpu(product_info->FirmwareBuildNumber)); 419 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n", 420 product_info->ManufactureDescDate[0], 421 product_info->ManufactureDescDate[1], 422 product_info->ManufactureDescDate[2]+1900); 423 dev_dbg(dev, " iDownloadFile 0x%x\n", 424 product_info->iDownloadFile); 425 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer); 426 } 427 428 static void get_product_info(struct edgeport_serial *edge_serial) 429 { 430 struct edgeport_product_info *product_info = &edge_serial->product_info; 431 432 memset(product_info, 0, sizeof(struct edgeport_product_info)); 433 434 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 435 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 436 product_info->ProdInfoVer = 0; 437 438 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 439 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 440 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 441 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 442 443 product_info->BootMajorVersion = 444 edge_serial->boot_descriptor.MajorVersion; 445 product_info->BootMinorVersion = 446 edge_serial->boot_descriptor.MinorVersion; 447 product_info->BootBuildNumber = 448 edge_serial->boot_descriptor.BuildNumber; 449 450 memcpy(product_info->ManufactureDescDate, 451 edge_serial->manuf_descriptor.DescDate, 452 sizeof(edge_serial->manuf_descriptor.DescDate)); 453 454 /* check if this is 2nd generation hardware */ 455 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 456 & ION_DEVICE_ID_80251_NETCHIP) 457 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 458 else 459 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 460 461 /* Determine Product type and set appropriate flags */ 462 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 463 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 464 case ION_DEVICE_ID_EDGEPORT_4T: 465 case ION_DEVICE_ID_EDGEPORT_4: 466 case ION_DEVICE_ID_EDGEPORT_2: 467 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 468 case ION_DEVICE_ID_EDGEPORT_8: 469 case ION_DEVICE_ID_EDGEPORT_421: 470 case ION_DEVICE_ID_EDGEPORT_21: 471 case ION_DEVICE_ID_EDGEPORT_2_DIN: 472 case ION_DEVICE_ID_EDGEPORT_4_DIN: 473 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 474 product_info->IsRS232 = 1; 475 break; 476 477 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 478 product_info->IsRS422 = 1; 479 product_info->IsRS485 = 1; 480 break; 481 482 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 483 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 484 product_info->IsRS422 = 1; 485 break; 486 } 487 488 dump_product_info(edge_serial, product_info); 489 } 490 491 static int get_epic_descriptor(struct edgeport_serial *ep) 492 { 493 int result; 494 struct usb_serial *serial = ep->serial; 495 struct edgeport_product_info *product_info = &ep->product_info; 496 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; 497 struct edge_compatibility_bits *bits; 498 struct device *dev = &serial->dev->dev; 499 500 ep->is_epic = 0; 501 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 502 USB_REQUEST_ION_GET_EPIC_DESC, 503 0xC0, 0x00, 0x00, 504 &ep->epic_descriptor, 505 sizeof(struct edge_compatibility_descriptor), 506 300); 507 508 if (result > 0) { 509 ep->is_epic = 1; 510 memset(product_info, 0, sizeof(struct edgeport_product_info)); 511 512 product_info->NumPorts = epic->NumPorts; 513 product_info->ProdInfoVer = 0; 514 product_info->FirmwareMajorVersion = epic->MajorVersion; 515 product_info->FirmwareMinorVersion = epic->MinorVersion; 516 product_info->FirmwareBuildNumber = epic->BuildNumber; 517 product_info->iDownloadFile = epic->iDownloadFile; 518 product_info->EpicVer = epic->EpicVer; 519 product_info->Epic = epic->Supports; 520 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 521 dump_product_info(ep, product_info); 522 523 bits = &ep->epic_descriptor.Supports; 524 dev_dbg(dev, "**EPIC descriptor:\n"); 525 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE"); 526 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE"); 527 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE"); 528 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE"); 529 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 530 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 531 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE"); 532 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE"); 533 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 534 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 535 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 536 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 537 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE"); 538 } 539 540 return result; 541 } 542 543 544 /************************************************************************/ 545 /************************************************************************/ 546 /* U S B C A L L B A C K F U N C T I O N S */ 547 /* U S B C A L L B A C K F U N C T I O N S */ 548 /************************************************************************/ 549 /************************************************************************/ 550 551 /***************************************************************************** 552 * edge_interrupt_callback 553 * this is the callback function for when we have received data on the 554 * interrupt endpoint. 555 *****************************************************************************/ 556 static void edge_interrupt_callback(struct urb *urb) 557 { 558 struct edgeport_serial *edge_serial = urb->context; 559 struct device *dev; 560 struct edgeport_port *edge_port; 561 struct usb_serial_port *port; 562 unsigned char *data = urb->transfer_buffer; 563 int length = urb->actual_length; 564 int bytes_avail; 565 int position; 566 int txCredits; 567 int portNumber; 568 int result; 569 int status = urb->status; 570 571 switch (status) { 572 case 0: 573 /* success */ 574 break; 575 case -ECONNRESET: 576 case -ENOENT: 577 case -ESHUTDOWN: 578 /* this urb is terminated, clean up */ 579 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 580 return; 581 default: 582 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); 583 goto exit; 584 } 585 586 dev = &edge_serial->serial->dev->dev; 587 588 /* process this interrupt-read even if there are no ports open */ 589 if (length) { 590 usb_serial_debug_data(dev, __func__, length, data); 591 592 if (length > 1) { 593 bytes_avail = data[0] | (data[1] << 8); 594 if (bytes_avail) { 595 spin_lock(&edge_serial->es_lock); 596 edge_serial->rxBytesAvail += bytes_avail; 597 dev_dbg(dev, 598 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n", 599 __func__, bytes_avail, 600 edge_serial->rxBytesAvail, 601 edge_serial->read_in_progress); 602 603 if (edge_serial->rxBytesAvail > 0 && 604 !edge_serial->read_in_progress) { 605 dev_dbg(dev, "%s - posting a read\n", __func__); 606 edge_serial->read_in_progress = true; 607 608 /* we have pending bytes on the 609 bulk in pipe, send a request */ 610 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 611 if (result) { 612 dev_err(dev, 613 "%s - usb_submit_urb(read bulk) failed with result = %d\n", 614 __func__, result); 615 edge_serial->read_in_progress = false; 616 } 617 } 618 spin_unlock(&edge_serial->es_lock); 619 } 620 } 621 /* grab the txcredits for the ports if available */ 622 position = 2; 623 portNumber = 0; 624 while ((position < length) && 625 (portNumber < edge_serial->serial->num_ports)) { 626 txCredits = data[position] | (data[position+1] << 8); 627 if (txCredits) { 628 port = edge_serial->serial->port[portNumber]; 629 edge_port = usb_get_serial_port_data(port); 630 if (edge_port->open) { 631 spin_lock(&edge_port->ep_lock); 632 edge_port->txCredits += txCredits; 633 spin_unlock(&edge_port->ep_lock); 634 dev_dbg(dev, "%s - txcredits for port%d = %d\n", 635 __func__, portNumber, 636 edge_port->txCredits); 637 638 /* tell the tty driver that something 639 has changed */ 640 tty_port_tty_wakeup(&edge_port->port->port); 641 /* Since we have more credit, check 642 if more data can be sent */ 643 send_more_port_data(edge_serial, 644 edge_port); 645 } 646 } 647 position += 2; 648 ++portNumber; 649 } 650 } 651 652 exit: 653 result = usb_submit_urb(urb, GFP_ATOMIC); 654 if (result) 655 dev_err(&urb->dev->dev, 656 "%s - Error %d submitting control urb\n", 657 __func__, result); 658 } 659 660 661 /***************************************************************************** 662 * edge_bulk_in_callback 663 * this is the callback function for when we have received data on the 664 * bulk in endpoint. 665 *****************************************************************************/ 666 static void edge_bulk_in_callback(struct urb *urb) 667 { 668 struct edgeport_serial *edge_serial = urb->context; 669 struct device *dev; 670 unsigned char *data = urb->transfer_buffer; 671 int retval; 672 __u16 raw_data_length; 673 int status = urb->status; 674 675 if (status) { 676 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", 677 __func__, status); 678 edge_serial->read_in_progress = false; 679 return; 680 } 681 682 if (urb->actual_length == 0) { 683 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__); 684 edge_serial->read_in_progress = false; 685 return; 686 } 687 688 dev = &edge_serial->serial->dev->dev; 689 raw_data_length = urb->actual_length; 690 691 usb_serial_debug_data(dev, __func__, raw_data_length, data); 692 693 spin_lock(&edge_serial->es_lock); 694 695 /* decrement our rxBytes available by the number that we just got */ 696 edge_serial->rxBytesAvail -= raw_data_length; 697 698 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__, 699 raw_data_length, edge_serial->rxBytesAvail); 700 701 process_rcvd_data(edge_serial, data, urb->actual_length); 702 703 /* check to see if there's any more data for us to read */ 704 if (edge_serial->rxBytesAvail > 0) { 705 dev_dbg(dev, "%s - posting a read\n", __func__); 706 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 707 if (retval) { 708 dev_err(dev, 709 "%s - usb_submit_urb(read bulk) failed, retval = %d\n", 710 __func__, retval); 711 edge_serial->read_in_progress = false; 712 } 713 } else { 714 edge_serial->read_in_progress = false; 715 } 716 717 spin_unlock(&edge_serial->es_lock); 718 } 719 720 721 /***************************************************************************** 722 * edge_bulk_out_data_callback 723 * this is the callback function for when we have finished sending 724 * serial data on the bulk out endpoint. 725 *****************************************************************************/ 726 static void edge_bulk_out_data_callback(struct urb *urb) 727 { 728 struct edgeport_port *edge_port = urb->context; 729 int status = urb->status; 730 731 if (status) { 732 dev_dbg(&urb->dev->dev, 733 "%s - nonzero write bulk status received: %d\n", 734 __func__, status); 735 } 736 737 if (edge_port->open) 738 tty_port_tty_wakeup(&edge_port->port->port); 739 740 /* Release the Write URB */ 741 edge_port->write_in_progress = false; 742 743 /* Check if more data needs to be sent */ 744 send_more_port_data((struct edgeport_serial *) 745 (usb_get_serial_data(edge_port->port->serial)), edge_port); 746 } 747 748 749 /***************************************************************************** 750 * BulkOutCmdCallback 751 * this is the callback function for when we have finished sending a 752 * command on the bulk out endpoint. 753 *****************************************************************************/ 754 static void edge_bulk_out_cmd_callback(struct urb *urb) 755 { 756 struct edgeport_port *edge_port = urb->context; 757 int status = urb->status; 758 759 atomic_dec(&CmdUrbs); 760 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n", 761 __func__, urb, atomic_read(&CmdUrbs)); 762 763 764 /* clean up the transfer buffer */ 765 kfree(urb->transfer_buffer); 766 767 /* Free the command urb */ 768 usb_free_urb(urb); 769 770 if (status) { 771 dev_dbg(&urb->dev->dev, 772 "%s - nonzero write bulk status received: %d\n", 773 __func__, status); 774 return; 775 } 776 777 /* tell the tty driver that something has changed */ 778 if (edge_port->open) 779 tty_port_tty_wakeup(&edge_port->port->port); 780 781 /* we have completed the command */ 782 edge_port->commandPending = false; 783 wake_up(&edge_port->wait_command); 784 } 785 786 787 /***************************************************************************** 788 * Driver tty interface functions 789 *****************************************************************************/ 790 791 /***************************************************************************** 792 * SerialOpen 793 * this function is called by the tty driver when a port is opened 794 * If successful, we return 0 795 * Otherwise we return a negative error number. 796 *****************************************************************************/ 797 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 798 { 799 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 800 struct device *dev = &port->dev; 801 struct usb_serial *serial; 802 struct edgeport_serial *edge_serial; 803 int response; 804 805 if (edge_port == NULL) 806 return -ENODEV; 807 808 /* see if we've set up our endpoint info yet (can't set it up 809 in edge_startup as the structures were not set up at that time.) */ 810 serial = port->serial; 811 edge_serial = usb_get_serial_data(serial); 812 if (edge_serial == NULL) 813 return -ENODEV; 814 if (edge_serial->interrupt_in_buffer == NULL) { 815 struct usb_serial_port *port0 = serial->port[0]; 816 817 /* not set up yet, so do it now */ 818 edge_serial->interrupt_in_buffer = 819 port0->interrupt_in_buffer; 820 edge_serial->interrupt_in_endpoint = 821 port0->interrupt_in_endpointAddress; 822 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 823 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 824 edge_serial->bulk_in_endpoint = 825 port0->bulk_in_endpointAddress; 826 edge_serial->read_urb = port0->read_urb; 827 edge_serial->bulk_out_endpoint = 828 port0->bulk_out_endpointAddress; 829 830 /* set up our interrupt urb */ 831 usb_fill_int_urb(edge_serial->interrupt_read_urb, 832 serial->dev, 833 usb_rcvintpipe(serial->dev, 834 port0->interrupt_in_endpointAddress), 835 port0->interrupt_in_buffer, 836 edge_serial->interrupt_read_urb->transfer_buffer_length, 837 edge_interrupt_callback, edge_serial, 838 edge_serial->interrupt_read_urb->interval); 839 840 /* set up our bulk in urb */ 841 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 842 usb_rcvbulkpipe(serial->dev, 843 port0->bulk_in_endpointAddress), 844 port0->bulk_in_buffer, 845 edge_serial->read_urb->transfer_buffer_length, 846 edge_bulk_in_callback, edge_serial); 847 edge_serial->read_in_progress = false; 848 849 /* start interrupt read for this edgeport 850 * this interrupt will continue as long 851 * as the edgeport is connected */ 852 response = usb_submit_urb(edge_serial->interrupt_read_urb, 853 GFP_KERNEL); 854 if (response) { 855 dev_err(dev, "%s - Error %d submitting control urb\n", 856 __func__, response); 857 } 858 } 859 860 /* initialize our wait queues */ 861 init_waitqueue_head(&edge_port->wait_open); 862 init_waitqueue_head(&edge_port->wait_chase); 863 init_waitqueue_head(&edge_port->wait_command); 864 865 /* initialize our port settings */ 866 edge_port->txCredits = 0; /* Can't send any data yet */ 867 /* Must always set this bit to enable ints! */ 868 edge_port->shadowMCR = MCR_MASTER_IE; 869 edge_port->chaseResponsePending = false; 870 871 /* send a open port command */ 872 edge_port->openPending = true; 873 edge_port->open = false; 874 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); 875 876 if (response < 0) { 877 dev_err(dev, "%s - error sending open port command\n", __func__); 878 edge_port->openPending = false; 879 return -ENODEV; 880 } 881 882 /* now wait for the port to be completely opened */ 883 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 884 OPEN_TIMEOUT); 885 886 if (!edge_port->open) { 887 /* open timed out */ 888 dev_dbg(dev, "%s - open timedout\n", __func__); 889 edge_port->openPending = false; 890 return -ENODEV; 891 } 892 893 /* create the txfifo */ 894 edge_port->txfifo.head = 0; 895 edge_port->txfifo.tail = 0; 896 edge_port->txfifo.count = 0; 897 edge_port->txfifo.size = edge_port->maxTxCredits; 898 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 899 900 if (!edge_port->txfifo.fifo) { 901 dev_dbg(dev, "%s - no memory\n", __func__); 902 edge_close(port); 903 return -ENOMEM; 904 } 905 906 /* Allocate a URB for the write */ 907 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 908 edge_port->write_in_progress = false; 909 910 if (!edge_port->write_urb) { 911 dev_dbg(dev, "%s - no memory\n", __func__); 912 edge_close(port); 913 return -ENOMEM; 914 } 915 916 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n", 917 __func__, edge_port->maxTxCredits); 918 919 return 0; 920 } 921 922 923 /************************************************************************ 924 * 925 * block_until_chase_response 926 * 927 * This function will block the close until one of the following: 928 * 1. Response to our Chase comes from Edgeport 929 * 2. A timeout of 10 seconds without activity has expired 930 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 931 * 932 ************************************************************************/ 933 static void block_until_chase_response(struct edgeport_port *edge_port) 934 { 935 struct device *dev = &edge_port->port->dev; 936 DEFINE_WAIT(wait); 937 __u16 lastCredits; 938 int timeout = 1*HZ; 939 int loop = 10; 940 941 while (1) { 942 /* Save Last credits */ 943 lastCredits = edge_port->txCredits; 944 945 /* Did we get our Chase response */ 946 if (!edge_port->chaseResponsePending) { 947 dev_dbg(dev, "%s - Got Chase Response\n", __func__); 948 949 /* did we get all of our credit back? */ 950 if (edge_port->txCredits == edge_port->maxTxCredits) { 951 dev_dbg(dev, "%s - Got all credits\n", __func__); 952 return; 953 } 954 } 955 956 /* Block the thread for a while */ 957 prepare_to_wait(&edge_port->wait_chase, &wait, 958 TASK_UNINTERRUPTIBLE); 959 schedule_timeout(timeout); 960 finish_wait(&edge_port->wait_chase, &wait); 961 962 if (lastCredits == edge_port->txCredits) { 963 /* No activity.. count down. */ 964 loop--; 965 if (loop == 0) { 966 edge_port->chaseResponsePending = false; 967 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__); 968 return; 969 } 970 } else { 971 /* Reset timeout value back to 10 seconds */ 972 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__, 973 lastCredits, edge_port->txCredits); 974 loop = 10; 975 } 976 } 977 } 978 979 980 /************************************************************************ 981 * 982 * block_until_tx_empty 983 * 984 * This function will block the close until one of the following: 985 * 1. TX count are 0 986 * 2. The edgeport has stopped 987 * 3. A timeout of 3 seconds without activity has expired 988 * 989 ************************************************************************/ 990 static void block_until_tx_empty(struct edgeport_port *edge_port) 991 { 992 struct device *dev = &edge_port->port->dev; 993 DEFINE_WAIT(wait); 994 struct TxFifo *fifo = &edge_port->txfifo; 995 __u32 lastCount; 996 int timeout = HZ/10; 997 int loop = 30; 998 999 while (1) { 1000 /* Save Last count */ 1001 lastCount = fifo->count; 1002 1003 /* Is the Edgeport Buffer empty? */ 1004 if (lastCount == 0) { 1005 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__); 1006 return; 1007 } 1008 1009 /* Block the thread for a while */ 1010 prepare_to_wait(&edge_port->wait_chase, &wait, 1011 TASK_UNINTERRUPTIBLE); 1012 schedule_timeout(timeout); 1013 finish_wait(&edge_port->wait_chase, &wait); 1014 1015 dev_dbg(dev, "%s wait\n", __func__); 1016 1017 if (lastCount == fifo->count) { 1018 /* No activity.. count down. */ 1019 loop--; 1020 if (loop == 0) { 1021 dev_dbg(dev, "%s - TIMEOUT\n", __func__); 1022 return; 1023 } 1024 } else { 1025 /* Reset timeout value back to seconds */ 1026 loop = 30; 1027 } 1028 } 1029 } 1030 1031 1032 /***************************************************************************** 1033 * edge_close 1034 * this function is called by the tty driver when a port is closed 1035 *****************************************************************************/ 1036 static void edge_close(struct usb_serial_port *port) 1037 { 1038 struct edgeport_serial *edge_serial; 1039 struct edgeport_port *edge_port; 1040 int status; 1041 1042 edge_serial = usb_get_serial_data(port->serial); 1043 edge_port = usb_get_serial_port_data(port); 1044 if (edge_serial == NULL || edge_port == NULL) 1045 return; 1046 1047 /* block until tx is empty */ 1048 block_until_tx_empty(edge_port); 1049 1050 edge_port->closePending = true; 1051 1052 if ((!edge_serial->is_epic) || 1053 ((edge_serial->is_epic) && 1054 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1055 /* flush and chase */ 1056 edge_port->chaseResponsePending = true; 1057 1058 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1059 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1060 if (status == 0) 1061 /* block until chase finished */ 1062 block_until_chase_response(edge_port); 1063 else 1064 edge_port->chaseResponsePending = false; 1065 } 1066 1067 if ((!edge_serial->is_epic) || 1068 ((edge_serial->is_epic) && 1069 (edge_serial->epic_descriptor.Supports.IOSPClose))) { 1070 /* close the port */ 1071 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__); 1072 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1073 } 1074 1075 /* port->close = true; */ 1076 edge_port->closePending = false; 1077 edge_port->open = false; 1078 edge_port->openPending = false; 1079 1080 usb_kill_urb(edge_port->write_urb); 1081 1082 if (edge_port->write_urb) { 1083 /* if this urb had a transfer buffer already 1084 (old transfer) free it */ 1085 kfree(edge_port->write_urb->transfer_buffer); 1086 usb_free_urb(edge_port->write_urb); 1087 edge_port->write_urb = NULL; 1088 } 1089 kfree(edge_port->txfifo.fifo); 1090 edge_port->txfifo.fifo = NULL; 1091 } 1092 1093 /***************************************************************************** 1094 * SerialWrite 1095 * this function is called by the tty driver when data should be written 1096 * to the port. 1097 * If successful, we return the number of bytes written, otherwise we 1098 * return a negative error number. 1099 *****************************************************************************/ 1100 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1101 const unsigned char *data, int count) 1102 { 1103 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1104 struct TxFifo *fifo; 1105 int copySize; 1106 int bytesleft; 1107 int firsthalf; 1108 int secondhalf; 1109 unsigned long flags; 1110 1111 if (edge_port == NULL) 1112 return -ENODEV; 1113 1114 /* get a pointer to the Tx fifo */ 1115 fifo = &edge_port->txfifo; 1116 1117 spin_lock_irqsave(&edge_port->ep_lock, flags); 1118 1119 /* calculate number of bytes to put in fifo */ 1120 copySize = min((unsigned int)count, 1121 (edge_port->txCredits - fifo->count)); 1122 1123 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n", 1124 __func__, count, edge_port->txCredits - fifo->count, copySize); 1125 1126 /* catch writes of 0 bytes which the tty driver likes to give us, 1127 and when txCredits is empty */ 1128 if (copySize == 0) { 1129 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__); 1130 goto finish_write; 1131 } 1132 1133 /* queue the data 1134 * since we can never overflow the buffer we do not have to check for a 1135 * full condition 1136 * 1137 * the copy is done is two parts -- first fill to the end of the buffer 1138 * then copy the reset from the start of the buffer 1139 */ 1140 bytesleft = fifo->size - fifo->head; 1141 firsthalf = min(bytesleft, copySize); 1142 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__, 1143 firsthalf, bytesleft); 1144 1145 /* now copy our data */ 1146 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1147 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]); 1148 1149 /* update the index and size */ 1150 fifo->head += firsthalf; 1151 fifo->count += firsthalf; 1152 1153 /* wrap the index */ 1154 if (fifo->head == fifo->size) 1155 fifo->head = 0; 1156 1157 secondhalf = copySize-firsthalf; 1158 1159 if (secondhalf) { 1160 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf); 1161 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1162 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]); 1163 /* update the index and size */ 1164 fifo->count += secondhalf; 1165 fifo->head += secondhalf; 1166 /* No need to check for wrap since we can not get to end of 1167 * the fifo in this part 1168 */ 1169 } 1170 1171 finish_write: 1172 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1173 1174 send_more_port_data((struct edgeport_serial *) 1175 usb_get_serial_data(port->serial), edge_port); 1176 1177 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n", 1178 __func__, copySize, edge_port->txCredits, fifo->count); 1179 1180 return copySize; 1181 } 1182 1183 1184 /************************************************************************ 1185 * 1186 * send_more_port_data() 1187 * 1188 * This routine attempts to write additional UART transmit data 1189 * to a port over the USB bulk pipe. It is called (1) when new 1190 * data has been written to a port's TxBuffer from higher layers 1191 * (2) when the peripheral sends us additional TxCredits indicating 1192 * that it can accept more Tx data for a given port; and (3) when 1193 * a bulk write completes successfully and we want to see if we 1194 * can transmit more. 1195 * 1196 ************************************************************************/ 1197 static void send_more_port_data(struct edgeport_serial *edge_serial, 1198 struct edgeport_port *edge_port) 1199 { 1200 struct TxFifo *fifo = &edge_port->txfifo; 1201 struct device *dev = &edge_port->port->dev; 1202 struct urb *urb; 1203 unsigned char *buffer; 1204 int status; 1205 int count; 1206 int bytesleft; 1207 int firsthalf; 1208 int secondhalf; 1209 unsigned long flags; 1210 1211 spin_lock_irqsave(&edge_port->ep_lock, flags); 1212 1213 if (edge_port->write_in_progress || 1214 !edge_port->open || 1215 (fifo->count == 0)) { 1216 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n", 1217 __func__, fifo->count, edge_port->write_in_progress); 1218 goto exit_send; 1219 } 1220 1221 /* since the amount of data in the fifo will always fit into the 1222 * edgeport buffer we do not need to check the write length 1223 * 1224 * Do we have enough credits for this port to make it worthwhile 1225 * to bother queueing a write. If it's too small, say a few bytes, 1226 * it's better to wait for more credits so we can do a larger write. 1227 */ 1228 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1229 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n", 1230 __func__, fifo->count, edge_port->txCredits); 1231 goto exit_send; 1232 } 1233 1234 /* lock this write */ 1235 edge_port->write_in_progress = true; 1236 1237 /* get a pointer to the write_urb */ 1238 urb = edge_port->write_urb; 1239 1240 /* make sure transfer buffer is freed */ 1241 kfree(urb->transfer_buffer); 1242 urb->transfer_buffer = NULL; 1243 1244 /* build the data header for the buffer and port that we are about 1245 to send out */ 1246 count = fifo->count; 1247 buffer = kmalloc(count+2, GFP_ATOMIC); 1248 if (buffer == NULL) { 1249 dev_err_console(edge_port->port, 1250 "%s - no more kernel memory...\n", __func__); 1251 edge_port->write_in_progress = false; 1252 goto exit_send; 1253 } 1254 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count); 1255 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count); 1256 1257 /* now copy our data */ 1258 bytesleft = fifo->size - fifo->tail; 1259 firsthalf = min(bytesleft, count); 1260 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1261 fifo->tail += firsthalf; 1262 fifo->count -= firsthalf; 1263 if (fifo->tail == fifo->size) 1264 fifo->tail = 0; 1265 1266 secondhalf = count-firsthalf; 1267 if (secondhalf) { 1268 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1269 secondhalf); 1270 fifo->tail += secondhalf; 1271 fifo->count -= secondhalf; 1272 } 1273 1274 if (count) 1275 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]); 1276 1277 /* fill up the urb with all of our data and submit it */ 1278 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1279 usb_sndbulkpipe(edge_serial->serial->dev, 1280 edge_serial->bulk_out_endpoint), 1281 buffer, count+2, 1282 edge_bulk_out_data_callback, edge_port); 1283 1284 /* decrement the number of credits we have by the number we just sent */ 1285 edge_port->txCredits -= count; 1286 edge_port->port->icount.tx += count; 1287 1288 status = usb_submit_urb(urb, GFP_ATOMIC); 1289 if (status) { 1290 /* something went wrong */ 1291 dev_err_console(edge_port->port, 1292 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1293 __func__, status); 1294 edge_port->write_in_progress = false; 1295 1296 /* revert the credits as something bad happened. */ 1297 edge_port->txCredits += count; 1298 edge_port->port->icount.tx -= count; 1299 } 1300 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n", 1301 __func__, count, edge_port->txCredits, fifo->count); 1302 1303 exit_send: 1304 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1305 } 1306 1307 1308 /***************************************************************************** 1309 * edge_write_room 1310 * this function is called by the tty driver when it wants to know how 1311 * many bytes of data we can accept for a specific port. If successful, 1312 * we return the amount of room that we have for this port (the txCredits) 1313 * otherwise we return a negative error number. 1314 *****************************************************************************/ 1315 static int edge_write_room(struct tty_struct *tty) 1316 { 1317 struct usb_serial_port *port = tty->driver_data; 1318 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1319 int room; 1320 unsigned long flags; 1321 1322 if (edge_port == NULL) 1323 return 0; 1324 if (edge_port->closePending) 1325 return 0; 1326 1327 if (!edge_port->open) { 1328 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1329 return 0; 1330 } 1331 1332 /* total of both buffers is still txCredit */ 1333 spin_lock_irqsave(&edge_port->ep_lock, flags); 1334 room = edge_port->txCredits - edge_port->txfifo.count; 1335 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1336 1337 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 1338 return room; 1339 } 1340 1341 1342 /***************************************************************************** 1343 * edge_chars_in_buffer 1344 * this function is called by the tty driver when it wants to know how 1345 * many bytes of data we currently have outstanding in the port (data that 1346 * has been written, but hasn't made it out the port yet) 1347 * If successful, we return the number of bytes left to be written in the 1348 * system, 1349 * Otherwise we return a negative error number. 1350 *****************************************************************************/ 1351 static int edge_chars_in_buffer(struct tty_struct *tty) 1352 { 1353 struct usb_serial_port *port = tty->driver_data; 1354 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1355 int num_chars; 1356 unsigned long flags; 1357 1358 if (edge_port == NULL) 1359 return 0; 1360 if (edge_port->closePending) 1361 return 0; 1362 1363 if (!edge_port->open) { 1364 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1365 return 0; 1366 } 1367 1368 spin_lock_irqsave(&edge_port->ep_lock, flags); 1369 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1370 edge_port->txfifo.count; 1371 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1372 if (num_chars) { 1373 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars); 1374 } 1375 1376 return num_chars; 1377 } 1378 1379 1380 /***************************************************************************** 1381 * SerialThrottle 1382 * this function is called by the tty driver when it wants to stop the data 1383 * being read from the port. 1384 *****************************************************************************/ 1385 static void edge_throttle(struct tty_struct *tty) 1386 { 1387 struct usb_serial_port *port = tty->driver_data; 1388 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1389 int status; 1390 1391 if (edge_port == NULL) 1392 return; 1393 1394 if (!edge_port->open) { 1395 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1396 return; 1397 } 1398 1399 /* if we are implementing XON/XOFF, send the stop character */ 1400 if (I_IXOFF(tty)) { 1401 unsigned char stop_char = STOP_CHAR(tty); 1402 status = edge_write(tty, port, &stop_char, 1); 1403 if (status <= 0) 1404 return; 1405 } 1406 1407 /* if we are implementing RTS/CTS, toggle that line */ 1408 if (tty->termios.c_cflag & CRTSCTS) { 1409 edge_port->shadowMCR &= ~MCR_RTS; 1410 status = send_cmd_write_uart_register(edge_port, MCR, 1411 edge_port->shadowMCR); 1412 if (status != 0) 1413 return; 1414 } 1415 } 1416 1417 1418 /***************************************************************************** 1419 * edge_unthrottle 1420 * this function is called by the tty driver when it wants to resume the 1421 * data being read from the port (called after SerialThrottle is called) 1422 *****************************************************************************/ 1423 static void edge_unthrottle(struct tty_struct *tty) 1424 { 1425 struct usb_serial_port *port = tty->driver_data; 1426 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1427 int status; 1428 1429 if (edge_port == NULL) 1430 return; 1431 1432 if (!edge_port->open) { 1433 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1434 return; 1435 } 1436 1437 /* if we are implementing XON/XOFF, send the start character */ 1438 if (I_IXOFF(tty)) { 1439 unsigned char start_char = START_CHAR(tty); 1440 status = edge_write(tty, port, &start_char, 1); 1441 if (status <= 0) 1442 return; 1443 } 1444 /* if we are implementing RTS/CTS, toggle that line */ 1445 if (tty->termios.c_cflag & CRTSCTS) { 1446 edge_port->shadowMCR |= MCR_RTS; 1447 send_cmd_write_uart_register(edge_port, MCR, 1448 edge_port->shadowMCR); 1449 } 1450 } 1451 1452 1453 /***************************************************************************** 1454 * SerialSetTermios 1455 * this function is called by the tty driver when it wants to change 1456 * the termios structure 1457 *****************************************************************************/ 1458 static void edge_set_termios(struct tty_struct *tty, 1459 struct usb_serial_port *port, struct ktermios *old_termios) 1460 { 1461 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1462 unsigned int cflag; 1463 1464 cflag = tty->termios.c_cflag; 1465 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag); 1466 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag); 1467 1468 if (edge_port == NULL) 1469 return; 1470 1471 if (!edge_port->open) { 1472 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1473 return; 1474 } 1475 1476 /* change the port settings to the new ones specified */ 1477 change_port_settings(tty, edge_port, old_termios); 1478 } 1479 1480 1481 /***************************************************************************** 1482 * get_lsr_info - get line status register info 1483 * 1484 * Purpose: Let user call ioctl() to get info when the UART physically 1485 * is emptied. On bus types like RS485, the transmitter must 1486 * release the bus after transmitting. This must be done when 1487 * the transmit shift register is empty, not be done when the 1488 * transmit holding register is empty. This functionality 1489 * allows an RS485 driver to be written in user space. 1490 *****************************************************************************/ 1491 static int get_lsr_info(struct edgeport_port *edge_port, 1492 unsigned int __user *value) 1493 { 1494 unsigned int result = 0; 1495 unsigned long flags; 1496 1497 spin_lock_irqsave(&edge_port->ep_lock, flags); 1498 if (edge_port->maxTxCredits == edge_port->txCredits && 1499 edge_port->txfifo.count == 0) { 1500 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__); 1501 result = TIOCSER_TEMT; 1502 } 1503 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1504 1505 if (copy_to_user(value, &result, sizeof(int))) 1506 return -EFAULT; 1507 return 0; 1508 } 1509 1510 static int edge_tiocmset(struct tty_struct *tty, 1511 unsigned int set, unsigned int clear) 1512 { 1513 struct usb_serial_port *port = tty->driver_data; 1514 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1515 unsigned int mcr; 1516 1517 mcr = edge_port->shadowMCR; 1518 if (set & TIOCM_RTS) 1519 mcr |= MCR_RTS; 1520 if (set & TIOCM_DTR) 1521 mcr |= MCR_DTR; 1522 if (set & TIOCM_LOOP) 1523 mcr |= MCR_LOOPBACK; 1524 1525 if (clear & TIOCM_RTS) 1526 mcr &= ~MCR_RTS; 1527 if (clear & TIOCM_DTR) 1528 mcr &= ~MCR_DTR; 1529 if (clear & TIOCM_LOOP) 1530 mcr &= ~MCR_LOOPBACK; 1531 1532 edge_port->shadowMCR = mcr; 1533 1534 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1535 1536 return 0; 1537 } 1538 1539 static int edge_tiocmget(struct tty_struct *tty) 1540 { 1541 struct usb_serial_port *port = tty->driver_data; 1542 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1543 unsigned int result = 0; 1544 unsigned int msr; 1545 unsigned int mcr; 1546 1547 msr = edge_port->shadowMSR; 1548 mcr = edge_port->shadowMCR; 1549 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1550 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1551 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1552 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1553 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1554 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1555 1556 return result; 1557 } 1558 1559 static int get_serial_info(struct edgeport_port *edge_port, 1560 struct serial_struct __user *retinfo) 1561 { 1562 struct serial_struct tmp; 1563 1564 if (!retinfo) 1565 return -EFAULT; 1566 1567 memset(&tmp, 0, sizeof(tmp)); 1568 1569 tmp.type = PORT_16550A; 1570 tmp.line = edge_port->port->minor; 1571 tmp.port = edge_port->port->port_number; 1572 tmp.irq = 0; 1573 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1574 tmp.xmit_fifo_size = edge_port->maxTxCredits; 1575 tmp.baud_base = 9600; 1576 tmp.close_delay = 5*HZ; 1577 tmp.closing_wait = 30*HZ; 1578 1579 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1580 return -EFAULT; 1581 return 0; 1582 } 1583 1584 1585 /***************************************************************************** 1586 * SerialIoctl 1587 * this function handles any ioctl calls to the driver 1588 *****************************************************************************/ 1589 static int edge_ioctl(struct tty_struct *tty, 1590 unsigned int cmd, unsigned long arg) 1591 { 1592 struct usb_serial_port *port = tty->driver_data; 1593 DEFINE_WAIT(wait); 1594 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1595 1596 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 1597 1598 switch (cmd) { 1599 case TIOCSERGETLSR: 1600 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1601 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1602 1603 case TIOCGSERIAL: 1604 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 1605 return get_serial_info(edge_port, (struct serial_struct __user *) arg); 1606 } 1607 return -ENOIOCTLCMD; 1608 } 1609 1610 1611 /***************************************************************************** 1612 * SerialBreak 1613 * this function sends a break to the port 1614 *****************************************************************************/ 1615 static void edge_break(struct tty_struct *tty, int break_state) 1616 { 1617 struct usb_serial_port *port = tty->driver_data; 1618 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1619 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1620 int status; 1621 1622 if ((!edge_serial->is_epic) || 1623 ((edge_serial->is_epic) && 1624 (edge_serial->epic_descriptor.Supports.IOSPChase))) { 1625 /* flush and chase */ 1626 edge_port->chaseResponsePending = true; 1627 1628 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1629 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1630 if (status == 0) { 1631 /* block until chase finished */ 1632 block_until_chase_response(edge_port); 1633 } else { 1634 edge_port->chaseResponsePending = false; 1635 } 1636 } 1637 1638 if ((!edge_serial->is_epic) || 1639 ((edge_serial->is_epic) && 1640 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { 1641 if (break_state == -1) { 1642 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__); 1643 status = send_iosp_ext_cmd(edge_port, 1644 IOSP_CMD_SET_BREAK, 0); 1645 } else { 1646 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__); 1647 status = send_iosp_ext_cmd(edge_port, 1648 IOSP_CMD_CLEAR_BREAK, 0); 1649 } 1650 if (status) 1651 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n", 1652 __func__); 1653 } 1654 } 1655 1656 1657 /***************************************************************************** 1658 * process_rcvd_data 1659 * this function handles the data received on the bulk in pipe. 1660 *****************************************************************************/ 1661 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1662 unsigned char *buffer, __u16 bufferLength) 1663 { 1664 struct device *dev = &edge_serial->serial->dev->dev; 1665 struct usb_serial_port *port; 1666 struct edgeport_port *edge_port; 1667 __u16 lastBufferLength; 1668 __u16 rxLen; 1669 1670 lastBufferLength = bufferLength + 1; 1671 1672 while (bufferLength > 0) { 1673 /* failsafe incase we get a message that we don't understand */ 1674 if (lastBufferLength == bufferLength) { 1675 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__); 1676 break; 1677 } 1678 lastBufferLength = bufferLength; 1679 1680 switch (edge_serial->rxState) { 1681 case EXPECT_HDR1: 1682 edge_serial->rxHeader1 = *buffer; 1683 ++buffer; 1684 --bufferLength; 1685 1686 if (bufferLength == 0) { 1687 edge_serial->rxState = EXPECT_HDR2; 1688 break; 1689 } 1690 /* otherwise, drop on through */ 1691 case EXPECT_HDR2: 1692 edge_serial->rxHeader2 = *buffer; 1693 ++buffer; 1694 --bufferLength; 1695 1696 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__, 1697 edge_serial->rxHeader1, edge_serial->rxHeader2); 1698 /* Process depending on whether this header is 1699 * data or status */ 1700 1701 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1702 /* Decode this status header and go to 1703 * EXPECT_HDR1 (if we can process the status 1704 * with only 2 bytes), or go to EXPECT_HDR3 to 1705 * get the third byte. */ 1706 edge_serial->rxPort = 1707 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1708 edge_serial->rxStatusCode = 1709 IOSP_GET_STATUS_CODE( 1710 edge_serial->rxHeader1); 1711 1712 if (!IOSP_STATUS_IS_2BYTE( 1713 edge_serial->rxStatusCode)) { 1714 /* This status needs additional bytes. 1715 * Save what we have and then wait for 1716 * more data. 1717 */ 1718 edge_serial->rxStatusParam 1719 = edge_serial->rxHeader2; 1720 edge_serial->rxState = EXPECT_HDR3; 1721 break; 1722 } 1723 /* We have all the header bytes, process the 1724 status now */ 1725 process_rcvd_status(edge_serial, 1726 edge_serial->rxHeader2, 0); 1727 edge_serial->rxState = EXPECT_HDR1; 1728 break; 1729 } else { 1730 edge_serial->rxPort = 1731 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1732 edge_serial->rxBytesRemaining = 1733 IOSP_GET_HDR_DATA_LEN( 1734 edge_serial->rxHeader1, 1735 edge_serial->rxHeader2); 1736 dev_dbg(dev, "%s - Data for Port %u Len %u\n", 1737 __func__, 1738 edge_serial->rxPort, 1739 edge_serial->rxBytesRemaining); 1740 1741 /* ASSERT(DevExt->RxPort < DevExt->NumPorts); 1742 * ASSERT(DevExt->RxBytesRemaining < 1743 * IOSP_MAX_DATA_LENGTH); 1744 */ 1745 1746 if (bufferLength == 0) { 1747 edge_serial->rxState = EXPECT_DATA; 1748 break; 1749 } 1750 /* Else, drop through */ 1751 } 1752 case EXPECT_DATA: /* Expect data */ 1753 if (bufferLength < edge_serial->rxBytesRemaining) { 1754 rxLen = bufferLength; 1755 /* Expect data to start next buffer */ 1756 edge_serial->rxState = EXPECT_DATA; 1757 } else { 1758 /* BufLen >= RxBytesRemaining */ 1759 rxLen = edge_serial->rxBytesRemaining; 1760 /* Start another header next time */ 1761 edge_serial->rxState = EXPECT_HDR1; 1762 } 1763 1764 bufferLength -= rxLen; 1765 edge_serial->rxBytesRemaining -= rxLen; 1766 1767 /* spit this data back into the tty driver if this 1768 port is open */ 1769 if (rxLen) { 1770 port = edge_serial->serial->port[ 1771 edge_serial->rxPort]; 1772 edge_port = usb_get_serial_port_data(port); 1773 if (edge_port->open) { 1774 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", 1775 __func__, rxLen, 1776 edge_serial->rxPort); 1777 edge_tty_recv(edge_port->port, buffer, 1778 rxLen); 1779 edge_port->port->icount.rx += rxLen; 1780 } 1781 buffer += rxLen; 1782 } 1783 break; 1784 1785 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1786 edge_serial->rxHeader3 = *buffer; 1787 ++buffer; 1788 --bufferLength; 1789 1790 /* We have all the header bytes, process the 1791 status now */ 1792 process_rcvd_status(edge_serial, 1793 edge_serial->rxStatusParam, 1794 edge_serial->rxHeader3); 1795 edge_serial->rxState = EXPECT_HDR1; 1796 break; 1797 } 1798 } 1799 } 1800 1801 1802 /***************************************************************************** 1803 * process_rcvd_status 1804 * this function handles the any status messages received on the 1805 * bulk in pipe. 1806 *****************************************************************************/ 1807 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1808 __u8 byte2, __u8 byte3) 1809 { 1810 struct usb_serial_port *port; 1811 struct edgeport_port *edge_port; 1812 struct tty_struct *tty; 1813 struct device *dev; 1814 __u8 code = edge_serial->rxStatusCode; 1815 1816 /* switch the port pointer to the one being currently talked about */ 1817 port = edge_serial->serial->port[edge_serial->rxPort]; 1818 edge_port = usb_get_serial_port_data(port); 1819 if (edge_port == NULL) { 1820 dev_err(&edge_serial->serial->dev->dev, 1821 "%s - edge_port == NULL for port %d\n", 1822 __func__, edge_serial->rxPort); 1823 return; 1824 } 1825 dev = &port->dev; 1826 1827 if (code == IOSP_EXT_STATUS) { 1828 switch (byte2) { 1829 case IOSP_EXT_STATUS_CHASE_RSP: 1830 /* we want to do EXT status regardless of port 1831 * open/closed */ 1832 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n", 1833 __func__, edge_serial->rxPort, byte3); 1834 /* Currently, the only EXT_STATUS is Chase, so process 1835 * here instead of one more call to one more subroutine 1836 * If/when more EXT_STATUS, there'll be more work to do 1837 * Also, we currently clear flag and close the port 1838 * regardless of content of above's Byte3. 1839 * We could choose to do something else when Byte3 says 1840 * Timeout on Chase from Edgeport, like wait longer in 1841 * block_until_chase_response, but for now we don't. 1842 */ 1843 edge_port->chaseResponsePending = false; 1844 wake_up(&edge_port->wait_chase); 1845 return; 1846 1847 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1848 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", 1849 __func__, edge_serial->rxPort, byte3); 1850 /* Port->RxCheckRsp = true; */ 1851 return; 1852 } 1853 } 1854 1855 if (code == IOSP_STATUS_OPEN_RSP) { 1856 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1857 edge_port->maxTxCredits = edge_port->txCredits; 1858 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n", 1859 __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 1860 handle_new_msr(edge_port, byte2); 1861 1862 /* send the current line settings to the port so we are 1863 in sync with any further termios calls */ 1864 tty = tty_port_tty_get(&edge_port->port->port); 1865 if (tty) { 1866 change_port_settings(tty, 1867 edge_port, &tty->termios); 1868 tty_kref_put(tty); 1869 } 1870 1871 /* we have completed the open */ 1872 edge_port->openPending = false; 1873 edge_port->open = true; 1874 wake_up(&edge_port->wait_open); 1875 return; 1876 } 1877 1878 /* If port is closed, silently discard all rcvd status. We can 1879 * have cases where buffered status is received AFTER the close 1880 * port command is sent to the Edgeport. 1881 */ 1882 if (!edge_port->open || edge_port->closePending) 1883 return; 1884 1885 switch (code) { 1886 /* Not currently sent by Edgeport */ 1887 case IOSP_STATUS_LSR: 1888 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n", 1889 __func__, edge_serial->rxPort, byte2); 1890 handle_new_lsr(edge_port, false, byte2, 0); 1891 break; 1892 1893 case IOSP_STATUS_LSR_DATA: 1894 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n", 1895 __func__, edge_serial->rxPort, byte2, byte3); 1896 /* byte2 is LSR Register */ 1897 /* byte3 is broken data byte */ 1898 handle_new_lsr(edge_port, true, byte2, byte3); 1899 break; 1900 /* 1901 * case IOSP_EXT_4_STATUS: 1902 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n", 1903 * __func__, edge_serial->rxPort, byte2, byte3); 1904 * break; 1905 */ 1906 case IOSP_STATUS_MSR: 1907 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n", 1908 __func__, edge_serial->rxPort, byte2); 1909 /* 1910 * Process this new modem status and generate appropriate 1911 * events, etc, based on the new status. This routine 1912 * also saves the MSR in Port->ShadowMsr. 1913 */ 1914 handle_new_msr(edge_port, byte2); 1915 break; 1916 1917 default: 1918 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code); 1919 break; 1920 } 1921 } 1922 1923 1924 /***************************************************************************** 1925 * edge_tty_recv 1926 * this function passes data on to the tty flip buffer 1927 *****************************************************************************/ 1928 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1929 int length) 1930 { 1931 int cnt; 1932 1933 cnt = tty_insert_flip_string(&port->port, data, length); 1934 if (cnt < length) { 1935 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1936 __func__, length - cnt); 1937 } 1938 data += cnt; 1939 length -= cnt; 1940 1941 tty_flip_buffer_push(&port->port); 1942 } 1943 1944 1945 /***************************************************************************** 1946 * handle_new_msr 1947 * this function handles any change to the msr register for a port. 1948 *****************************************************************************/ 1949 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 1950 { 1951 struct async_icount *icount; 1952 1953 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1954 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1955 icount = &edge_port->port->icount; 1956 1957 /* update input line counters */ 1958 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 1959 icount->cts++; 1960 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 1961 icount->dsr++; 1962 if (newMsr & EDGEPORT_MSR_DELTA_CD) 1963 icount->dcd++; 1964 if (newMsr & EDGEPORT_MSR_DELTA_RI) 1965 icount->rng++; 1966 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 1967 } 1968 1969 /* Save the new modem status */ 1970 edge_port->shadowMSR = newMsr & 0xf0; 1971 } 1972 1973 1974 /***************************************************************************** 1975 * handle_new_lsr 1976 * this function handles any change to the lsr register for a port. 1977 *****************************************************************************/ 1978 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 1979 __u8 lsr, __u8 data) 1980 { 1981 __u8 newLsr = (__u8) (lsr & (__u8) 1982 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 1983 struct async_icount *icount; 1984 1985 edge_port->shadowLSR = lsr; 1986 1987 if (newLsr & LSR_BREAK) { 1988 /* 1989 * Parity and Framing errors only count if they 1990 * occur exclusive of a break being 1991 * received. 1992 */ 1993 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1994 } 1995 1996 /* Place LSR data byte into Rx buffer */ 1997 if (lsrData) 1998 edge_tty_recv(edge_port->port, &data, 1); 1999 2000 /* update input line counters */ 2001 icount = &edge_port->port->icount; 2002 if (newLsr & LSR_BREAK) 2003 icount->brk++; 2004 if (newLsr & LSR_OVER_ERR) 2005 icount->overrun++; 2006 if (newLsr & LSR_PAR_ERR) 2007 icount->parity++; 2008 if (newLsr & LSR_FRM_ERR) 2009 icount->frame++; 2010 } 2011 2012 2013 /**************************************************************************** 2014 * sram_write 2015 * writes a number of bytes to the Edgeport device's sram starting at the 2016 * given address. 2017 * If successful returns the number of bytes written, otherwise it returns 2018 * a negative error number of the problem. 2019 ****************************************************************************/ 2020 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2021 __u16 length, const __u8 *data) 2022 { 2023 int result; 2024 __u16 current_length; 2025 unsigned char *transfer_buffer; 2026 2027 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length); 2028 2029 transfer_buffer = kmalloc(64, GFP_KERNEL); 2030 if (!transfer_buffer) { 2031 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2032 __func__, 64); 2033 return -ENOMEM; 2034 } 2035 2036 /* need to split these writes up into 64 byte chunks */ 2037 result = 0; 2038 while (length > 0) { 2039 if (length > 64) 2040 current_length = 64; 2041 else 2042 current_length = length; 2043 2044 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */ 2045 memcpy(transfer_buffer, data, current_length); 2046 result = usb_control_msg(serial->dev, 2047 usb_sndctrlpipe(serial->dev, 0), 2048 USB_REQUEST_ION_WRITE_RAM, 2049 0x40, addr, extAddr, transfer_buffer, 2050 current_length, 300); 2051 if (result < 0) 2052 break; 2053 length -= current_length; 2054 addr += current_length; 2055 data += current_length; 2056 } 2057 2058 kfree(transfer_buffer); 2059 return result; 2060 } 2061 2062 2063 /**************************************************************************** 2064 * rom_write 2065 * writes a number of bytes to the Edgeport device's ROM starting at the 2066 * given address. 2067 * If successful returns the number of bytes written, otherwise it returns 2068 * a negative error number of the problem. 2069 ****************************************************************************/ 2070 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2071 __u16 length, const __u8 *data) 2072 { 2073 int result; 2074 __u16 current_length; 2075 unsigned char *transfer_buffer; 2076 2077 transfer_buffer = kmalloc(64, GFP_KERNEL); 2078 if (!transfer_buffer) { 2079 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", 2080 __func__, 64); 2081 return -ENOMEM; 2082 } 2083 2084 /* need to split these writes up into 64 byte chunks */ 2085 result = 0; 2086 while (length > 0) { 2087 if (length > 64) 2088 current_length = 64; 2089 else 2090 current_length = length; 2091 memcpy(transfer_buffer, data, current_length); 2092 result = usb_control_msg(serial->dev, 2093 usb_sndctrlpipe(serial->dev, 0), 2094 USB_REQUEST_ION_WRITE_ROM, 0x40, 2095 addr, extAddr, 2096 transfer_buffer, current_length, 300); 2097 if (result < 0) 2098 break; 2099 length -= current_length; 2100 addr += current_length; 2101 data += current_length; 2102 } 2103 2104 kfree(transfer_buffer); 2105 return result; 2106 } 2107 2108 2109 /**************************************************************************** 2110 * rom_read 2111 * reads a number of bytes from the Edgeport device starting at the given 2112 * address. 2113 * If successful returns the number of bytes read, otherwise it returns 2114 * a negative error number of the problem. 2115 ****************************************************************************/ 2116 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2117 __u16 addr, __u16 length, __u8 *data) 2118 { 2119 int result; 2120 __u16 current_length; 2121 unsigned char *transfer_buffer; 2122 2123 transfer_buffer = kmalloc(64, GFP_KERNEL); 2124 if (!transfer_buffer) { 2125 dev_err(&serial->dev->dev, 2126 "%s - kmalloc(%d) failed.\n", __func__, 64); 2127 return -ENOMEM; 2128 } 2129 2130 /* need to split these reads up into 64 byte chunks */ 2131 result = 0; 2132 while (length > 0) { 2133 if (length > 64) 2134 current_length = 64; 2135 else 2136 current_length = length; 2137 result = usb_control_msg(serial->dev, 2138 usb_rcvctrlpipe(serial->dev, 0), 2139 USB_REQUEST_ION_READ_ROM, 2140 0xC0, addr, extAddr, transfer_buffer, 2141 current_length, 300); 2142 if (result < 0) 2143 break; 2144 memcpy(data, transfer_buffer, current_length); 2145 length -= current_length; 2146 addr += current_length; 2147 data += current_length; 2148 } 2149 2150 kfree(transfer_buffer); 2151 return result; 2152 } 2153 2154 2155 /**************************************************************************** 2156 * send_iosp_ext_cmd 2157 * Is used to send a IOSP message to the Edgeport device 2158 ****************************************************************************/ 2159 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2160 __u8 command, __u8 param) 2161 { 2162 unsigned char *buffer; 2163 unsigned char *currentCommand; 2164 int length = 0; 2165 int status = 0; 2166 2167 buffer = kmalloc(10, GFP_ATOMIC); 2168 if (!buffer) { 2169 dev_err(&edge_port->port->dev, 2170 "%s - kmalloc(%d) failed.\n", __func__, 10); 2171 return -ENOMEM; 2172 } 2173 2174 currentCommand = buffer; 2175 2176 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number, 2177 command, param); 2178 2179 status = write_cmd_usb(edge_port, buffer, length); 2180 if (status) { 2181 /* something bad happened, let's free up the memory */ 2182 kfree(buffer); 2183 } 2184 2185 return status; 2186 } 2187 2188 2189 /***************************************************************************** 2190 * write_cmd_usb 2191 * this function writes the given buffer out to the bulk write endpoint. 2192 *****************************************************************************/ 2193 static int write_cmd_usb(struct edgeport_port *edge_port, 2194 unsigned char *buffer, int length) 2195 { 2196 struct edgeport_serial *edge_serial = 2197 usb_get_serial_data(edge_port->port->serial); 2198 struct device *dev = &edge_port->port->dev; 2199 int status = 0; 2200 struct urb *urb; 2201 2202 usb_serial_debug_data(dev, __func__, length, buffer); 2203 2204 /* Allocate our next urb */ 2205 urb = usb_alloc_urb(0, GFP_ATOMIC); 2206 if (!urb) 2207 return -ENOMEM; 2208 2209 atomic_inc(&CmdUrbs); 2210 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n", 2211 __func__, urb, atomic_read(&CmdUrbs)); 2212 2213 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2214 usb_sndbulkpipe(edge_serial->serial->dev, 2215 edge_serial->bulk_out_endpoint), 2216 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2217 2218 edge_port->commandPending = true; 2219 status = usb_submit_urb(urb, GFP_ATOMIC); 2220 2221 if (status) { 2222 /* something went wrong */ 2223 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", 2224 __func__, status); 2225 usb_kill_urb(urb); 2226 usb_free_urb(urb); 2227 atomic_dec(&CmdUrbs); 2228 return status; 2229 } 2230 2231 #if 0 2232 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2233 2234 if (edge_port->commandPending) { 2235 /* command timed out */ 2236 dev_dbg(dev, "%s - command timed out\n", __func__); 2237 status = -EINVAL; 2238 } 2239 #endif 2240 return status; 2241 } 2242 2243 2244 /***************************************************************************** 2245 * send_cmd_write_baud_rate 2246 * this function sends the proper command to change the baud rate of the 2247 * specified port. 2248 *****************************************************************************/ 2249 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2250 int baudRate) 2251 { 2252 struct edgeport_serial *edge_serial = 2253 usb_get_serial_data(edge_port->port->serial); 2254 struct device *dev = &edge_port->port->dev; 2255 unsigned char *cmdBuffer; 2256 unsigned char *currCmd; 2257 int cmdLen = 0; 2258 int divisor; 2259 int status; 2260 u32 number = edge_port->port->port_number; 2261 2262 if (edge_serial->is_epic && 2263 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2264 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n", 2265 baudRate); 2266 return 0; 2267 } 2268 2269 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate); 2270 2271 status = calc_baud_rate_divisor(dev, baudRate, &divisor); 2272 if (status) { 2273 dev_err(dev, "%s - bad baud rate\n", __func__); 2274 return status; 2275 } 2276 2277 /* Alloc memory for the string of commands. */ 2278 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2279 if (!cmdBuffer) { 2280 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100); 2281 return -ENOMEM; 2282 } 2283 currCmd = cmdBuffer; 2284 2285 /* Enable access to divisor latch */ 2286 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2287 2288 /* Write the divisor itself */ 2289 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2290 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2291 2292 /* Restore original value to disable access to divisor latch */ 2293 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2294 edge_port->shadowLCR); 2295 2296 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2297 if (status) { 2298 /* something bad happened, let's free up the memory */ 2299 kfree(cmdBuffer); 2300 } 2301 2302 return status; 2303 } 2304 2305 2306 /***************************************************************************** 2307 * calc_baud_rate_divisor 2308 * this function calculates the proper baud rate divisor for the specified 2309 * baud rate. 2310 *****************************************************************************/ 2311 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor) 2312 { 2313 int i; 2314 __u16 custom; 2315 2316 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2317 if (divisor_table[i].BaudRate == baudrate) { 2318 *divisor = divisor_table[i].Divisor; 2319 return 0; 2320 } 2321 } 2322 2323 /* We have tried all of the standard baud rates 2324 * lets try to calculate the divisor for this baud rate 2325 * Make sure the baud rate is reasonable */ 2326 if (baudrate > 50 && baudrate < 230400) { 2327 /* get divisor */ 2328 custom = (__u16)((230400L + baudrate/2) / baudrate); 2329 2330 *divisor = custom; 2331 2332 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom); 2333 return 0; 2334 } 2335 2336 return -1; 2337 } 2338 2339 2340 /***************************************************************************** 2341 * send_cmd_write_uart_register 2342 * this function builds up a uart register message and sends to the device. 2343 *****************************************************************************/ 2344 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2345 __u8 regNum, __u8 regValue) 2346 { 2347 struct edgeport_serial *edge_serial = 2348 usb_get_serial_data(edge_port->port->serial); 2349 struct device *dev = &edge_port->port->dev; 2350 unsigned char *cmdBuffer; 2351 unsigned char *currCmd; 2352 unsigned long cmdLen = 0; 2353 int status; 2354 2355 dev_dbg(dev, "%s - write to %s register 0x%02x\n", 2356 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2357 2358 if (edge_serial->is_epic && 2359 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2360 regNum == MCR) { 2361 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n"); 2362 return 0; 2363 } 2364 2365 if (edge_serial->is_epic && 2366 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2367 regNum == LCR) { 2368 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n"); 2369 return 0; 2370 } 2371 2372 /* Alloc memory for the string of commands. */ 2373 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2374 if (cmdBuffer == NULL) 2375 return -ENOMEM; 2376 2377 currCmd = cmdBuffer; 2378 2379 /* Build a cmd in the buffer to write the given register */ 2380 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number, 2381 regNum, regValue); 2382 2383 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2384 if (status) { 2385 /* something bad happened, let's free up the memory */ 2386 kfree(cmdBuffer); 2387 } 2388 2389 return status; 2390 } 2391 2392 2393 /***************************************************************************** 2394 * change_port_settings 2395 * This routine is called to set the UART on the device to match the 2396 * specified new settings. 2397 *****************************************************************************/ 2398 2399 static void change_port_settings(struct tty_struct *tty, 2400 struct edgeport_port *edge_port, struct ktermios *old_termios) 2401 { 2402 struct device *dev = &edge_port->port->dev; 2403 struct edgeport_serial *edge_serial = 2404 usb_get_serial_data(edge_port->port->serial); 2405 int baud; 2406 unsigned cflag; 2407 __u8 mask = 0xff; 2408 __u8 lData; 2409 __u8 lParity; 2410 __u8 lStop; 2411 __u8 rxFlow; 2412 __u8 txFlow; 2413 int status; 2414 2415 if (!edge_port->open && 2416 !edge_port->openPending) { 2417 dev_dbg(dev, "%s - port not opened\n", __func__); 2418 return; 2419 } 2420 2421 cflag = tty->termios.c_cflag; 2422 2423 switch (cflag & CSIZE) { 2424 case CS5: 2425 lData = LCR_BITS_5; mask = 0x1f; 2426 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2427 break; 2428 case CS6: 2429 lData = LCR_BITS_6; mask = 0x3f; 2430 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2431 break; 2432 case CS7: 2433 lData = LCR_BITS_7; mask = 0x7f; 2434 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2435 break; 2436 default: 2437 case CS8: 2438 lData = LCR_BITS_8; 2439 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2440 break; 2441 } 2442 2443 lParity = LCR_PAR_NONE; 2444 if (cflag & PARENB) { 2445 if (cflag & CMSPAR) { 2446 if (cflag & PARODD) { 2447 lParity = LCR_PAR_MARK; 2448 dev_dbg(dev, "%s - parity = mark\n", __func__); 2449 } else { 2450 lParity = LCR_PAR_SPACE; 2451 dev_dbg(dev, "%s - parity = space\n", __func__); 2452 } 2453 } else if (cflag & PARODD) { 2454 lParity = LCR_PAR_ODD; 2455 dev_dbg(dev, "%s - parity = odd\n", __func__); 2456 } else { 2457 lParity = LCR_PAR_EVEN; 2458 dev_dbg(dev, "%s - parity = even\n", __func__); 2459 } 2460 } else { 2461 dev_dbg(dev, "%s - parity = none\n", __func__); 2462 } 2463 2464 if (cflag & CSTOPB) { 2465 lStop = LCR_STOP_2; 2466 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2467 } else { 2468 lStop = LCR_STOP_1; 2469 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2470 } 2471 2472 /* figure out the flow control settings */ 2473 rxFlow = txFlow = 0x00; 2474 if (cflag & CRTSCTS) { 2475 rxFlow |= IOSP_RX_FLOW_RTS; 2476 txFlow |= IOSP_TX_FLOW_CTS; 2477 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2478 } else { 2479 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2480 } 2481 2482 /* if we are implementing XON/XOFF, set the start and stop character 2483 in the device */ 2484 if (I_IXOFF(tty) || I_IXON(tty)) { 2485 unsigned char stop_char = STOP_CHAR(tty); 2486 unsigned char start_char = START_CHAR(tty); 2487 2488 if ((!edge_serial->is_epic) || 2489 ((edge_serial->is_epic) && 2490 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { 2491 send_iosp_ext_cmd(edge_port, 2492 IOSP_CMD_SET_XON_CHAR, start_char); 2493 send_iosp_ext_cmd(edge_port, 2494 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2495 } 2496 2497 /* if we are implementing INBOUND XON/XOFF */ 2498 if (I_IXOFF(tty)) { 2499 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2500 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2501 __func__, start_char, stop_char); 2502 } else { 2503 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2504 } 2505 2506 /* if we are implementing OUTBOUND XON/XOFF */ 2507 if (I_IXON(tty)) { 2508 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2509 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2510 __func__, start_char, stop_char); 2511 } else { 2512 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2513 } 2514 } 2515 2516 /* Set flow control to the configured value */ 2517 if ((!edge_serial->is_epic) || 2518 ((edge_serial->is_epic) && 2519 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) 2520 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2521 if ((!edge_serial->is_epic) || 2522 ((edge_serial->is_epic) && 2523 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) 2524 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2525 2526 2527 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2528 edge_port->shadowLCR |= (lData | lParity | lStop); 2529 2530 edge_port->validDataMask = mask; 2531 2532 /* Send the updated LCR value to the EdgePort */ 2533 status = send_cmd_write_uart_register(edge_port, LCR, 2534 edge_port->shadowLCR); 2535 if (status != 0) 2536 return; 2537 2538 /* set up the MCR register and send it to the EdgePort */ 2539 edge_port->shadowMCR = MCR_MASTER_IE; 2540 if (cflag & CBAUD) 2541 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2542 2543 status = send_cmd_write_uart_register(edge_port, MCR, 2544 edge_port->shadowMCR); 2545 if (status != 0) 2546 return; 2547 2548 /* Determine divisor based on baud rate */ 2549 baud = tty_get_baud_rate(tty); 2550 if (!baud) { 2551 /* pick a default, any default... */ 2552 baud = 9600; 2553 } 2554 2555 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 2556 status = send_cmd_write_baud_rate(edge_port, baud); 2557 if (status == -1) { 2558 /* Speed change was not possible - put back the old speed */ 2559 baud = tty_termios_baud_rate(old_termios); 2560 tty_encode_baud_rate(tty, baud, baud); 2561 } 2562 } 2563 2564 2565 /**************************************************************************** 2566 * unicode_to_ascii 2567 * Turns a string from Unicode into ASCII. 2568 * Doesn't do a good job with any characters that are outside the normal 2569 * ASCII range, but it's only for debugging... 2570 * NOTE: expects the unicode in LE format 2571 ****************************************************************************/ 2572 static void unicode_to_ascii(char *string, int buflen, 2573 __le16 *unicode, int unicode_size) 2574 { 2575 int i; 2576 2577 if (buflen <= 0) /* never happens, but... */ 2578 return; 2579 --buflen; /* space for nul */ 2580 2581 for (i = 0; i < unicode_size; i++) { 2582 if (i >= buflen) 2583 break; 2584 string[i] = (char)(le16_to_cpu(unicode[i])); 2585 } 2586 string[i] = 0x00; 2587 } 2588 2589 2590 /**************************************************************************** 2591 * get_manufacturing_desc 2592 * reads in the manufacturing descriptor and stores it into the serial 2593 * structure. 2594 ****************************************************************************/ 2595 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2596 { 2597 struct device *dev = &edge_serial->serial->dev->dev; 2598 int response; 2599 2600 dev_dbg(dev, "getting manufacturer descriptor\n"); 2601 2602 response = rom_read(edge_serial->serial, 2603 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2604 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2605 EDGE_MANUF_DESC_LEN, 2606 (__u8 *)(&edge_serial->manuf_descriptor)); 2607 2608 if (response < 1) 2609 dev_err(dev, "error in getting manufacturer descriptor\n"); 2610 else { 2611 char string[30]; 2612 dev_dbg(dev, "**Manufacturer Descriptor\n"); 2613 dev_dbg(dev, " RomSize: %dK\n", 2614 edge_serial->manuf_descriptor.RomSize); 2615 dev_dbg(dev, " RamSize: %dK\n", 2616 edge_serial->manuf_descriptor.RamSize); 2617 dev_dbg(dev, " CpuRev: %d\n", 2618 edge_serial->manuf_descriptor.CpuRev); 2619 dev_dbg(dev, " BoardRev: %d\n", 2620 edge_serial->manuf_descriptor.BoardRev); 2621 dev_dbg(dev, " NumPorts: %d\n", 2622 edge_serial->manuf_descriptor.NumPorts); 2623 dev_dbg(dev, " DescDate: %d/%d/%d\n", 2624 edge_serial->manuf_descriptor.DescDate[0], 2625 edge_serial->manuf_descriptor.DescDate[1], 2626 edge_serial->manuf_descriptor.DescDate[2]+1900); 2627 unicode_to_ascii(string, sizeof(string), 2628 edge_serial->manuf_descriptor.SerialNumber, 2629 edge_serial->manuf_descriptor.SerNumLength/2); 2630 dev_dbg(dev, " SerialNumber: %s\n", string); 2631 unicode_to_ascii(string, sizeof(string), 2632 edge_serial->manuf_descriptor.AssemblyNumber, 2633 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2634 dev_dbg(dev, " AssemblyNumber: %s\n", string); 2635 unicode_to_ascii(string, sizeof(string), 2636 edge_serial->manuf_descriptor.OemAssyNumber, 2637 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2638 dev_dbg(dev, " OemAssyNumber: %s\n", string); 2639 dev_dbg(dev, " UartType: %d\n", 2640 edge_serial->manuf_descriptor.UartType); 2641 dev_dbg(dev, " IonPid: %d\n", 2642 edge_serial->manuf_descriptor.IonPid); 2643 dev_dbg(dev, " IonConfig: %d\n", 2644 edge_serial->manuf_descriptor.IonConfig); 2645 } 2646 } 2647 2648 2649 /**************************************************************************** 2650 * get_boot_desc 2651 * reads in the bootloader descriptor and stores it into the serial 2652 * structure. 2653 ****************************************************************************/ 2654 static void get_boot_desc(struct edgeport_serial *edge_serial) 2655 { 2656 struct device *dev = &edge_serial->serial->dev->dev; 2657 int response; 2658 2659 dev_dbg(dev, "getting boot descriptor\n"); 2660 2661 response = rom_read(edge_serial->serial, 2662 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2663 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2664 EDGE_BOOT_DESC_LEN, 2665 (__u8 *)(&edge_serial->boot_descriptor)); 2666 2667 if (response < 1) 2668 dev_err(dev, "error in getting boot descriptor\n"); 2669 else { 2670 dev_dbg(dev, "**Boot Descriptor:\n"); 2671 dev_dbg(dev, " BootCodeLength: %d\n", 2672 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2673 dev_dbg(dev, " MajorVersion: %d\n", 2674 edge_serial->boot_descriptor.MajorVersion); 2675 dev_dbg(dev, " MinorVersion: %d\n", 2676 edge_serial->boot_descriptor.MinorVersion); 2677 dev_dbg(dev, " BuildNumber: %d\n", 2678 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2679 dev_dbg(dev, " Capabilities: 0x%x\n", 2680 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2681 dev_dbg(dev, " UConfig0: %d\n", 2682 edge_serial->boot_descriptor.UConfig0); 2683 dev_dbg(dev, " UConfig1: %d\n", 2684 edge_serial->boot_descriptor.UConfig1); 2685 } 2686 } 2687 2688 2689 /**************************************************************************** 2690 * load_application_firmware 2691 * This is called to load the application firmware to the device 2692 ****************************************************************************/ 2693 static void load_application_firmware(struct edgeport_serial *edge_serial) 2694 { 2695 struct device *dev = &edge_serial->serial->dev->dev; 2696 const struct ihex_binrec *rec; 2697 const struct firmware *fw; 2698 const char *fw_name; 2699 const char *fw_info; 2700 int response; 2701 __u32 Operaddr; 2702 __u16 build; 2703 2704 switch (edge_serial->product_info.iDownloadFile) { 2705 case EDGE_DOWNLOAD_FILE_I930: 2706 fw_info = "downloading firmware version (930)"; 2707 fw_name = "edgeport/down.fw"; 2708 break; 2709 2710 case EDGE_DOWNLOAD_FILE_80251: 2711 fw_info = "downloading firmware version (80251)"; 2712 fw_name = "edgeport/down2.fw"; 2713 break; 2714 2715 case EDGE_DOWNLOAD_FILE_NONE: 2716 dev_dbg(dev, "No download file specified, skipping download\n"); 2717 return; 2718 2719 default: 2720 return; 2721 } 2722 2723 response = request_ihex_firmware(&fw, fw_name, 2724 &edge_serial->serial->dev->dev); 2725 if (response) { 2726 dev_err(dev, "Failed to load image \"%s\" err %d\n", 2727 fw_name, response); 2728 return; 2729 } 2730 2731 rec = (const struct ihex_binrec *)fw->data; 2732 build = (rec->data[2] << 8) | rec->data[3]; 2733 2734 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build); 2735 2736 edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; 2737 edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; 2738 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2739 2740 for (rec = ihex_next_binrec(rec); rec; 2741 rec = ihex_next_binrec(rec)) { 2742 Operaddr = be32_to_cpu(rec->addr); 2743 response = sram_write(edge_serial->serial, 2744 Operaddr >> 16, 2745 Operaddr & 0xFFFF, 2746 be16_to_cpu(rec->len), 2747 &rec->data[0]); 2748 if (response < 0) { 2749 dev_err(&edge_serial->serial->dev->dev, 2750 "sram_write failed (%x, %x, %d)\n", 2751 Operaddr >> 16, Operaddr & 0xFFFF, 2752 be16_to_cpu(rec->len)); 2753 break; 2754 } 2755 } 2756 2757 dev_dbg(dev, "sending exec_dl_code\n"); 2758 response = usb_control_msg (edge_serial->serial->dev, 2759 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2760 USB_REQUEST_ION_EXEC_DL_CODE, 2761 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2762 2763 release_firmware(fw); 2764 } 2765 2766 2767 /**************************************************************************** 2768 * edge_startup 2769 ****************************************************************************/ 2770 static int edge_startup(struct usb_serial *serial) 2771 { 2772 struct edgeport_serial *edge_serial; 2773 struct usb_device *dev; 2774 struct device *ddev = &serial->dev->dev; 2775 int i; 2776 int response; 2777 bool interrupt_in_found; 2778 bool bulk_in_found; 2779 bool bulk_out_found; 2780 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2781 EDGE_COMPATIBILITY_MASK1, 2782 EDGE_COMPATIBILITY_MASK2 }; 2783 2784 dev = serial->dev; 2785 2786 /* create our private serial structure */ 2787 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2788 if (edge_serial == NULL) { 2789 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2790 return -ENOMEM; 2791 } 2792 spin_lock_init(&edge_serial->es_lock); 2793 edge_serial->serial = serial; 2794 usb_set_serial_data(serial, edge_serial); 2795 2796 /* get the name for the device from the device */ 2797 i = usb_string(dev, dev->descriptor.iManufacturer, 2798 &edge_serial->name[0], MAX_NAME_LEN+1); 2799 if (i < 0) 2800 i = 0; 2801 edge_serial->name[i++] = ' '; 2802 usb_string(dev, dev->descriptor.iProduct, 2803 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2804 2805 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2806 2807 /* Read the epic descriptor */ 2808 if (get_epic_descriptor(edge_serial) <= 0) { 2809 /* memcpy descriptor to Supports structures */ 2810 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2811 sizeof(struct edge_compatibility_bits)); 2812 2813 /* get the manufacturing descriptor for this device */ 2814 get_manufacturing_desc(edge_serial); 2815 2816 /* get the boot descriptor */ 2817 get_boot_desc(edge_serial); 2818 2819 get_product_info(edge_serial); 2820 } 2821 2822 /* set the number of ports from the manufacturing description */ 2823 /* serial->num_ports = serial->product_info.NumPorts; */ 2824 if ((!edge_serial->is_epic) && 2825 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2826 dev_warn(ddev, 2827 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n", 2828 edge_serial->product_info.NumPorts, 2829 serial->num_ports); 2830 } 2831 2832 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies); 2833 2834 /* If not an EPiC device */ 2835 if (!edge_serial->is_epic) { 2836 /* now load the application firmware into this device */ 2837 load_application_firmware(edge_serial); 2838 2839 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies); 2840 2841 /* Check current Edgeport EEPROM and update if necessary */ 2842 update_edgeport_E2PROM(edge_serial); 2843 2844 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies); 2845 2846 /* set the configuration to use #1 */ 2847 /* dev_dbg(ddev, "set_configuration 1\n"); */ 2848 /* usb_set_configuration (dev, 1); */ 2849 } 2850 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n", 2851 edge_serial->product_info.FirmwareMajorVersion, 2852 edge_serial->product_info.FirmwareMinorVersion, 2853 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 2854 2855 /* we set up the pointers to the endpoints in the edge_open function, 2856 * as the structures aren't created yet. */ 2857 2858 response = 0; 2859 2860 if (edge_serial->is_epic) { 2861 /* EPIC thing, set up our interrupt polling now and our read 2862 * urb, so that the device knows it really is connected. */ 2863 interrupt_in_found = bulk_in_found = bulk_out_found = false; 2864 for (i = 0; i < serial->interface->altsetting[0] 2865 .desc.bNumEndpoints; ++i) { 2866 struct usb_endpoint_descriptor *endpoint; 2867 int buffer_size; 2868 2869 endpoint = &serial->interface->altsetting[0]. 2870 endpoint[i].desc; 2871 buffer_size = usb_endpoint_maxp(endpoint); 2872 if (!interrupt_in_found && 2873 (usb_endpoint_is_int_in(endpoint))) { 2874 /* we found a interrupt in endpoint */ 2875 dev_dbg(ddev, "found interrupt in\n"); 2876 2877 /* not set up yet, so do it now */ 2878 edge_serial->interrupt_read_urb = 2879 usb_alloc_urb(0, GFP_KERNEL); 2880 if (!edge_serial->interrupt_read_urb) { 2881 dev_err(ddev, "out of memory\n"); 2882 return -ENOMEM; 2883 } 2884 edge_serial->interrupt_in_buffer = 2885 kmalloc(buffer_size, GFP_KERNEL); 2886 if (!edge_serial->interrupt_in_buffer) { 2887 dev_err(ddev, "out of memory\n"); 2888 usb_free_urb(edge_serial->interrupt_read_urb); 2889 return -ENOMEM; 2890 } 2891 edge_serial->interrupt_in_endpoint = 2892 endpoint->bEndpointAddress; 2893 2894 /* set up our interrupt urb */ 2895 usb_fill_int_urb( 2896 edge_serial->interrupt_read_urb, 2897 dev, 2898 usb_rcvintpipe(dev, 2899 endpoint->bEndpointAddress), 2900 edge_serial->interrupt_in_buffer, 2901 buffer_size, 2902 edge_interrupt_callback, 2903 edge_serial, 2904 endpoint->bInterval); 2905 2906 interrupt_in_found = true; 2907 } 2908 2909 if (!bulk_in_found && 2910 (usb_endpoint_is_bulk_in(endpoint))) { 2911 /* we found a bulk in endpoint */ 2912 dev_dbg(ddev, "found bulk in\n"); 2913 2914 /* not set up yet, so do it now */ 2915 edge_serial->read_urb = 2916 usb_alloc_urb(0, GFP_KERNEL); 2917 if (!edge_serial->read_urb) { 2918 dev_err(ddev, "out of memory\n"); 2919 return -ENOMEM; 2920 } 2921 edge_serial->bulk_in_buffer = 2922 kmalloc(buffer_size, GFP_KERNEL); 2923 if (!edge_serial->bulk_in_buffer) { 2924 dev_err(&dev->dev, "out of memory\n"); 2925 usb_free_urb(edge_serial->read_urb); 2926 return -ENOMEM; 2927 } 2928 edge_serial->bulk_in_endpoint = 2929 endpoint->bEndpointAddress; 2930 2931 /* set up our bulk in urb */ 2932 usb_fill_bulk_urb(edge_serial->read_urb, dev, 2933 usb_rcvbulkpipe(dev, 2934 endpoint->bEndpointAddress), 2935 edge_serial->bulk_in_buffer, 2936 usb_endpoint_maxp(endpoint), 2937 edge_bulk_in_callback, 2938 edge_serial); 2939 bulk_in_found = true; 2940 } 2941 2942 if (!bulk_out_found && 2943 (usb_endpoint_is_bulk_out(endpoint))) { 2944 /* we found a bulk out endpoint */ 2945 dev_dbg(ddev, "found bulk out\n"); 2946 edge_serial->bulk_out_endpoint = 2947 endpoint->bEndpointAddress; 2948 bulk_out_found = true; 2949 } 2950 } 2951 2952 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { 2953 dev_err(ddev, "Error - the proper endpoints were not found!\n"); 2954 return -ENODEV; 2955 } 2956 2957 /* start interrupt read for this edgeport this interrupt will 2958 * continue as long as the edgeport is connected */ 2959 response = usb_submit_urb(edge_serial->interrupt_read_urb, 2960 GFP_KERNEL); 2961 if (response) 2962 dev_err(ddev, "%s - Error %d submitting control urb\n", 2963 __func__, response); 2964 } 2965 return response; 2966 } 2967 2968 2969 /**************************************************************************** 2970 * edge_disconnect 2971 * This function is called whenever the device is removed from the usb bus. 2972 ****************************************************************************/ 2973 static void edge_disconnect(struct usb_serial *serial) 2974 { 2975 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2976 2977 /* stop reads and writes on all ports */ 2978 /* free up our endpoint stuff */ 2979 if (edge_serial->is_epic) { 2980 usb_kill_urb(edge_serial->interrupt_read_urb); 2981 usb_free_urb(edge_serial->interrupt_read_urb); 2982 kfree(edge_serial->interrupt_in_buffer); 2983 2984 usb_kill_urb(edge_serial->read_urb); 2985 usb_free_urb(edge_serial->read_urb); 2986 kfree(edge_serial->bulk_in_buffer); 2987 } 2988 } 2989 2990 2991 /**************************************************************************** 2992 * edge_release 2993 * This function is called when the device structure is deallocated. 2994 ****************************************************************************/ 2995 static void edge_release(struct usb_serial *serial) 2996 { 2997 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2998 2999 kfree(edge_serial); 3000 } 3001 3002 static int edge_port_probe(struct usb_serial_port *port) 3003 { 3004 struct edgeport_port *edge_port; 3005 3006 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 3007 if (!edge_port) 3008 return -ENOMEM; 3009 3010 spin_lock_init(&edge_port->ep_lock); 3011 edge_port->port = port; 3012 3013 usb_set_serial_port_data(port, edge_port); 3014 3015 return 0; 3016 } 3017 3018 static int edge_port_remove(struct usb_serial_port *port) 3019 { 3020 struct edgeport_port *edge_port; 3021 3022 edge_port = usb_get_serial_port_data(port); 3023 kfree(edge_port); 3024 3025 return 0; 3026 } 3027 3028 module_usb_serial_driver(serial_drivers, id_table_combined); 3029 3030 MODULE_AUTHOR(DRIVER_AUTHOR); 3031 MODULE_DESCRIPTION(DRIVER_DESC); 3032 MODULE_LICENSE("GPL"); 3033 MODULE_FIRMWARE("edgeport/boot.fw"); 3034 MODULE_FIRMWARE("edgeport/boot2.fw"); 3035 MODULE_FIRMWARE("edgeport/down.fw"); 3036 MODULE_FIRMWARE("edgeport/down2.fw"); 3037