1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Edgeport USB Serial Converter driver 4 * 5 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 7 * 8 * Supports the following devices: 9 * Edgeport/4 10 * Edgeport/4t 11 * Edgeport/2 12 * Edgeport/4i 13 * Edgeport/2i 14 * Edgeport/421 15 * Edgeport/21 16 * Rapidport/4 17 * Edgeport/8 18 * Edgeport/2D8 19 * Edgeport/4D8 20 * Edgeport/8i 21 * 22 * For questions or problems with this driver, contact Inside Out 23 * Networks technical support, or Peter Berger <pberger@brimson.com>, 24 * or Al Borchers <alborchers@steinerpoint.com>. 25 * 26 */ 27 28 #include <linux/kernel.h> 29 #include <linux/jiffies.h> 30 #include <linux/errno.h> 31 #include <linux/slab.h> 32 #include <linux/tty.h> 33 #include <linux/tty_driver.h> 34 #include <linux/tty_flip.h> 35 #include <linux/module.h> 36 #include <linux/spinlock.h> 37 #include <linux/serial.h> 38 #include <linux/ioctl.h> 39 #include <linux/wait.h> 40 #include <linux/firmware.h> 41 #include <linux/ihex.h> 42 #include <linux/uaccess.h> 43 #include <linux/usb.h> 44 #include <linux/usb/serial.h> 45 #include "io_edgeport.h" 46 #include "io_ionsp.h" /* info for the iosp messages */ 47 #include "io_16654.h" /* 16654 UART defines */ 48 49 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 50 #define DRIVER_DESC "Edgeport USB Serial Driver" 51 52 #define MAX_NAME_LEN 64 53 54 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ 55 56 static const struct usb_device_id edgeport_2port_id_table[] = { 57 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) }, 58 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) }, 59 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) }, 60 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) }, 61 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) }, 62 { } 63 }; 64 65 static const struct usb_device_id edgeport_4port_id_table[] = { 66 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) }, 67 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) }, 68 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) }, 69 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) }, 70 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) }, 71 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) }, 72 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) }, 73 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) }, 74 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) }, 75 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) }, 76 { } 77 }; 78 79 static const struct usb_device_id edgeport_8port_id_table[] = { 80 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) }, 81 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) }, 82 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) }, 83 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) }, 84 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) }, 85 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) }, 86 { } 87 }; 88 89 static const struct usb_device_id Epic_port_id_table[] = { 90 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) }, 91 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) }, 92 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) }, 93 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) }, 94 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) }, 95 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) }, 96 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) }, 97 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) }, 98 { } 99 }; 100 101 /* Devices that this driver supports */ 102 static const struct usb_device_id id_table_combined[] = { 103 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) }, 104 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) }, 105 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) }, 106 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) }, 107 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) }, 108 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) }, 109 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) }, 110 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) }, 111 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) }, 112 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) }, 113 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) }, 114 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) }, 115 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) }, 116 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) }, 117 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) }, 118 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) }, 119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) }, 120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) }, 121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) }, 122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) }, 123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) }, 124 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) }, 125 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) }, 126 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) }, 127 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) }, 128 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) }, 129 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) }, 130 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) }, 131 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) }, 132 { } /* Terminating entry */ 133 }; 134 135 MODULE_DEVICE_TABLE(usb, id_table_combined); 136 137 138 /* receive port state */ 139 enum RXSTATE { 140 EXPECT_HDR1 = 0, /* Expect header byte 1 */ 141 EXPECT_HDR2 = 1, /* Expect header byte 2 */ 142 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ 143 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ 144 }; 145 146 147 /* Transmit Fifo 148 * This Transmit queue is an extension of the edgeport Rx buffer. 149 * The maximum amount of data buffered in both the edgeport 150 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. 151 */ 152 struct TxFifo { 153 unsigned int head; /* index to head pointer (write) */ 154 unsigned int tail; /* index to tail pointer (read) */ 155 unsigned int count; /* Bytes in queue */ 156 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ 157 unsigned char *fifo; /* allocated Buffer */ 158 }; 159 160 /* This structure holds all of the local port information */ 161 struct edgeport_port { 162 __u16 txCredits; /* our current credits for this port */ 163 __u16 maxTxCredits; /* the max size of the port */ 164 165 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ 166 struct urb *write_urb; /* write URB for this port */ 167 bool write_in_progress; /* 'true' while a write URB is outstanding */ 168 spinlock_t ep_lock; 169 170 __u8 shadowLCR; /* last LCR value received */ 171 __u8 shadowMCR; /* last MCR value received */ 172 __u8 shadowMSR; /* last MSR value received */ 173 __u8 shadowLSR; /* last LSR value received */ 174 __u8 shadowXonChar; /* last value set as XON char in Edgeport */ 175 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ 176 __u8 validDataMask; 177 __u32 baudRate; 178 179 bool open; 180 bool openPending; 181 bool commandPending; 182 bool closePending; 183 bool chaseResponsePending; 184 185 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 186 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ 187 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ 188 189 struct usb_serial_port *port; /* loop back to the owner of this object */ 190 }; 191 192 193 /* This structure holds all of the individual device information */ 194 struct edgeport_serial { 195 char name[MAX_NAME_LEN+2]; /* string name of this device */ 196 197 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ 198 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ 199 struct edgeport_product_info product_info; /* Product Info */ 200 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ 201 int is_epic; /* flag if EPiC device or not */ 202 203 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ 204 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ 205 struct urb *interrupt_read_urb; /* our interrupt urb */ 206 207 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ 208 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ 209 struct urb *read_urb; /* our bulk read urb */ 210 bool read_in_progress; 211 spinlock_t es_lock; 212 213 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ 214 215 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ 216 217 enum RXSTATE rxState; /* the current state of the bulk receive processor */ 218 __u8 rxHeader1; /* receive header byte 1 */ 219 __u8 rxHeader2; /* receive header byte 2 */ 220 __u8 rxHeader3; /* receive header byte 3 */ 221 __u8 rxPort; /* the port that we are currently receiving data for */ 222 __u8 rxStatusCode; /* the receive status code */ 223 __u8 rxStatusParam; /* the receive status paramater */ 224 __s16 rxBytesRemaining; /* the number of port bytes left to read */ 225 struct usb_serial *serial; /* loop back to the owner of this object */ 226 }; 227 228 /* baud rate information */ 229 struct divisor_table_entry { 230 __u32 BaudRate; 231 __u16 Divisor; 232 }; 233 234 /* 235 * Define table of divisors for Rev A EdgePort/4 hardware 236 * These assume a 3.6864MHz crystal, the standard /16, and 237 * MCR.7 = 0. 238 */ 239 240 static const struct divisor_table_entry divisor_table[] = { 241 { 50, 4608}, 242 { 75, 3072}, 243 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ 244 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ 245 { 150, 1536}, 246 { 300, 768}, 247 { 600, 384}, 248 { 1200, 192}, 249 { 1800, 128}, 250 { 2400, 96}, 251 { 4800, 48}, 252 { 7200, 32}, 253 { 9600, 24}, 254 { 14400, 16}, 255 { 19200, 12}, 256 { 38400, 6}, 257 { 57600, 4}, 258 { 115200, 2}, 259 { 230400, 1}, 260 }; 261 262 /* Number of outstanding Command Write Urbs */ 263 static atomic_t CmdUrbs = ATOMIC_INIT(0); 264 265 266 /* local function prototypes */ 267 268 /* function prototypes for all URB callbacks */ 269 static void edge_interrupt_callback(struct urb *urb); 270 static void edge_bulk_in_callback(struct urb *urb); 271 static void edge_bulk_out_data_callback(struct urb *urb); 272 static void edge_bulk_out_cmd_callback(struct urb *urb); 273 274 /* function prototypes for the usbserial callbacks */ 275 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); 276 static void edge_close(struct usb_serial_port *port); 277 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 278 const unsigned char *buf, int count); 279 static int edge_write_room(struct tty_struct *tty); 280 static int edge_chars_in_buffer(struct tty_struct *tty); 281 static void edge_throttle(struct tty_struct *tty); 282 static void edge_unthrottle(struct tty_struct *tty); 283 static void edge_set_termios(struct tty_struct *tty, 284 struct usb_serial_port *port, 285 struct ktermios *old_termios); 286 static int edge_ioctl(struct tty_struct *tty, 287 unsigned int cmd, unsigned long arg); 288 static void edge_break(struct tty_struct *tty, int break_state); 289 static int edge_tiocmget(struct tty_struct *tty); 290 static int edge_tiocmset(struct tty_struct *tty, 291 unsigned int set, unsigned int clear); 292 static int edge_startup(struct usb_serial *serial); 293 static void edge_disconnect(struct usb_serial *serial); 294 static void edge_release(struct usb_serial *serial); 295 static int edge_port_probe(struct usb_serial_port *port); 296 static int edge_port_remove(struct usb_serial_port *port); 297 298 /* function prototypes for all of our local functions */ 299 300 static void process_rcvd_data(struct edgeport_serial *edge_serial, 301 unsigned char *buffer, __u16 bufferLength); 302 static void process_rcvd_status(struct edgeport_serial *edge_serial, 303 __u8 byte2, __u8 byte3); 304 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 305 int length); 306 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); 307 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 308 __u8 lsr, __u8 data); 309 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, 310 __u8 param); 311 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor); 312 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 313 int baudRate); 314 static void change_port_settings(struct tty_struct *tty, 315 struct edgeport_port *edge_port, 316 struct ktermios *old_termios); 317 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 318 __u8 regNum, __u8 regValue); 319 static int write_cmd_usb(struct edgeport_port *edge_port, 320 unsigned char *buffer, int writeLength); 321 static void send_more_port_data(struct edgeport_serial *edge_serial, 322 struct edgeport_port *edge_port); 323 324 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 325 __u16 length, const __u8 *data); 326 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, 327 __u16 length, __u8 *data); 328 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 329 __u16 length, const __u8 *data); 330 static void get_manufacturing_desc(struct edgeport_serial *edge_serial); 331 static void get_boot_desc(struct edgeport_serial *edge_serial); 332 static void load_application_firmware(struct edgeport_serial *edge_serial); 333 334 static void unicode_to_ascii(char *string, int buflen, 335 __le16 *unicode, int unicode_size); 336 337 338 /* ************************************************************************ */ 339 /* ************************************************************************ */ 340 /* ************************************************************************ */ 341 /* ************************************************************************ */ 342 343 /************************************************************************ 344 * * 345 * update_edgeport_E2PROM() Compare current versions of * 346 * Boot ROM and Manufacture * 347 * Descriptors with versions * 348 * embedded in this driver * 349 * * 350 ************************************************************************/ 351 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) 352 { 353 struct device *dev = &edge_serial->serial->dev->dev; 354 __u32 BootCurVer; 355 __u32 BootNewVer; 356 __u8 BootMajorVersion; 357 __u8 BootMinorVersion; 358 __u16 BootBuildNumber; 359 __u32 Bootaddr; 360 const struct ihex_binrec *rec; 361 const struct firmware *fw; 362 const char *fw_name; 363 int response; 364 365 switch (edge_serial->product_info.iDownloadFile) { 366 case EDGE_DOWNLOAD_FILE_I930: 367 fw_name = "edgeport/boot.fw"; 368 break; 369 case EDGE_DOWNLOAD_FILE_80251: 370 fw_name = "edgeport/boot2.fw"; 371 break; 372 default: 373 return; 374 } 375 376 response = request_ihex_firmware(&fw, fw_name, 377 &edge_serial->serial->dev->dev); 378 if (response) { 379 dev_err(dev, "Failed to load image \"%s\" err %d\n", 380 fw_name, response); 381 return; 382 } 383 384 rec = (const struct ihex_binrec *)fw->data; 385 BootMajorVersion = rec->data[0]; 386 BootMinorVersion = rec->data[1]; 387 BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; 388 389 /* Check Boot Image Version */ 390 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + 391 (edge_serial->boot_descriptor.MinorVersion << 16) + 392 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); 393 394 BootNewVer = (BootMajorVersion << 24) + 395 (BootMinorVersion << 16) + 396 BootBuildNumber; 397 398 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n", 399 edge_serial->boot_descriptor.MajorVersion, 400 edge_serial->boot_descriptor.MinorVersion, 401 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 402 403 404 if (BootNewVer > BootCurVer) { 405 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n", 406 edge_serial->boot_descriptor.MajorVersion, 407 edge_serial->boot_descriptor.MinorVersion, 408 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), 409 BootMajorVersion, BootMinorVersion, BootBuildNumber); 410 411 dev_dbg(dev, "Downloading new Boot Image\n"); 412 413 for (rec = ihex_next_binrec(rec); rec; 414 rec = ihex_next_binrec(rec)) { 415 Bootaddr = be32_to_cpu(rec->addr); 416 response = rom_write(edge_serial->serial, 417 Bootaddr >> 16, 418 Bootaddr & 0xFFFF, 419 be16_to_cpu(rec->len), 420 &rec->data[0]); 421 if (response < 0) { 422 dev_err(&edge_serial->serial->dev->dev, 423 "rom_write failed (%x, %x, %d)\n", 424 Bootaddr >> 16, Bootaddr & 0xFFFF, 425 be16_to_cpu(rec->len)); 426 break; 427 } 428 } 429 } else { 430 dev_dbg(dev, "Boot Image -- already up to date\n"); 431 } 432 release_firmware(fw); 433 } 434 435 #if 0 436 /************************************************************************ 437 * 438 * Get string descriptor from device 439 * 440 ************************************************************************/ 441 static int get_string_desc(struct usb_device *dev, int Id, 442 struct usb_string_descriptor **pRetDesc) 443 { 444 struct usb_string_descriptor StringDesc; 445 struct usb_string_descriptor *pStringDesc; 446 447 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id); 448 449 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, 450 sizeof(StringDesc))) 451 return 0; 452 453 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); 454 if (!pStringDesc) 455 return -1; 456 457 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, 458 StringDesc.bLength)) { 459 kfree(pStringDesc); 460 return -1; 461 } 462 463 *pRetDesc = pStringDesc; 464 return 0; 465 } 466 #endif 467 468 static void dump_product_info(struct edgeport_serial *edge_serial, 469 struct edgeport_product_info *product_info) 470 { 471 struct device *dev = &edge_serial->serial->dev->dev; 472 473 /* Dump Product Info structure */ 474 dev_dbg(dev, "**Product Information:\n"); 475 dev_dbg(dev, " ProductId %x\n", product_info->ProductId); 476 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts); 477 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer); 478 dev_dbg(dev, " IsServer %d\n", product_info->IsServer); 479 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232); 480 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422); 481 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485); 482 dev_dbg(dev, " RomSize %d\n", product_info->RomSize); 483 dev_dbg(dev, " RamSize %d\n", product_info->RamSize); 484 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev); 485 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev); 486 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n", 487 product_info->BootMajorVersion, 488 product_info->BootMinorVersion, 489 le16_to_cpu(product_info->BootBuildNumber)); 490 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n", 491 product_info->FirmwareMajorVersion, 492 product_info->FirmwareMinorVersion, 493 le16_to_cpu(product_info->FirmwareBuildNumber)); 494 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n", 495 product_info->ManufactureDescDate[0], 496 product_info->ManufactureDescDate[1], 497 product_info->ManufactureDescDate[2]+1900); 498 dev_dbg(dev, " iDownloadFile 0x%x\n", 499 product_info->iDownloadFile); 500 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer); 501 } 502 503 static void get_product_info(struct edgeport_serial *edge_serial) 504 { 505 struct edgeport_product_info *product_info = &edge_serial->product_info; 506 507 memset(product_info, 0, sizeof(struct edgeport_product_info)); 508 509 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); 510 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; 511 product_info->ProdInfoVer = 0; 512 513 product_info->RomSize = edge_serial->manuf_descriptor.RomSize; 514 product_info->RamSize = edge_serial->manuf_descriptor.RamSize; 515 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; 516 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; 517 518 product_info->BootMajorVersion = 519 edge_serial->boot_descriptor.MajorVersion; 520 product_info->BootMinorVersion = 521 edge_serial->boot_descriptor.MinorVersion; 522 product_info->BootBuildNumber = 523 edge_serial->boot_descriptor.BuildNumber; 524 525 memcpy(product_info->ManufactureDescDate, 526 edge_serial->manuf_descriptor.DescDate, 527 sizeof(edge_serial->manuf_descriptor.DescDate)); 528 529 /* check if this is 2nd generation hardware */ 530 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) 531 & ION_DEVICE_ID_80251_NETCHIP) 532 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; 533 else 534 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; 535 536 /* Determine Product type and set appropriate flags */ 537 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { 538 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: 539 case ION_DEVICE_ID_EDGEPORT_4T: 540 case ION_DEVICE_ID_EDGEPORT_4: 541 case ION_DEVICE_ID_EDGEPORT_2: 542 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: 543 case ION_DEVICE_ID_EDGEPORT_8: 544 case ION_DEVICE_ID_EDGEPORT_421: 545 case ION_DEVICE_ID_EDGEPORT_21: 546 case ION_DEVICE_ID_EDGEPORT_2_DIN: 547 case ION_DEVICE_ID_EDGEPORT_4_DIN: 548 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: 549 product_info->IsRS232 = 1; 550 break; 551 552 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ 553 product_info->IsRS422 = 1; 554 product_info->IsRS485 = 1; 555 break; 556 557 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ 558 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ 559 product_info->IsRS422 = 1; 560 break; 561 } 562 563 dump_product_info(edge_serial, product_info); 564 } 565 566 static int get_epic_descriptor(struct edgeport_serial *ep) 567 { 568 int result; 569 struct usb_serial *serial = ep->serial; 570 struct edgeport_product_info *product_info = &ep->product_info; 571 struct edge_compatibility_descriptor *epic; 572 struct edge_compatibility_bits *bits; 573 struct device *dev = &serial->dev->dev; 574 575 ep->is_epic = 0; 576 577 epic = kmalloc(sizeof(*epic), GFP_KERNEL); 578 if (!epic) 579 return -ENOMEM; 580 581 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 582 USB_REQUEST_ION_GET_EPIC_DESC, 583 0xC0, 0x00, 0x00, 584 epic, sizeof(*epic), 585 300); 586 if (result == sizeof(*epic)) { 587 ep->is_epic = 1; 588 memcpy(&ep->epic_descriptor, epic, sizeof(*epic)); 589 memset(product_info, 0, sizeof(struct edgeport_product_info)); 590 591 product_info->NumPorts = epic->NumPorts; 592 product_info->ProdInfoVer = 0; 593 product_info->FirmwareMajorVersion = epic->MajorVersion; 594 product_info->FirmwareMinorVersion = epic->MinorVersion; 595 product_info->FirmwareBuildNumber = epic->BuildNumber; 596 product_info->iDownloadFile = epic->iDownloadFile; 597 product_info->EpicVer = epic->EpicVer; 598 product_info->Epic = epic->Supports; 599 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; 600 dump_product_info(ep, product_info); 601 602 bits = &ep->epic_descriptor.Supports; 603 dev_dbg(dev, "**EPIC descriptor:\n"); 604 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE"); 605 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE"); 606 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE"); 607 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE"); 608 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); 609 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); 610 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE"); 611 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE"); 612 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); 613 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE"); 614 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE"); 615 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); 616 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE"); 617 618 result = 0; 619 } else if (result >= 0) { 620 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n", 621 result); 622 result = -EIO; 623 } 624 625 kfree(epic); 626 627 return result; 628 } 629 630 631 /************************************************************************/ 632 /************************************************************************/ 633 /* U S B C A L L B A C K F U N C T I O N S */ 634 /* U S B C A L L B A C K F U N C T I O N S */ 635 /************************************************************************/ 636 /************************************************************************/ 637 638 /***************************************************************************** 639 * edge_interrupt_callback 640 * this is the callback function for when we have received data on the 641 * interrupt endpoint. 642 *****************************************************************************/ 643 static void edge_interrupt_callback(struct urb *urb) 644 { 645 struct edgeport_serial *edge_serial = urb->context; 646 struct device *dev; 647 struct edgeport_port *edge_port; 648 struct usb_serial_port *port; 649 unsigned char *data = urb->transfer_buffer; 650 int length = urb->actual_length; 651 unsigned long flags; 652 int bytes_avail; 653 int position; 654 int txCredits; 655 int portNumber; 656 int result; 657 int status = urb->status; 658 659 switch (status) { 660 case 0: 661 /* success */ 662 break; 663 case -ECONNRESET: 664 case -ENOENT: 665 case -ESHUTDOWN: 666 /* this urb is terminated, clean up */ 667 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 668 return; 669 default: 670 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); 671 goto exit; 672 } 673 674 dev = &edge_serial->serial->dev->dev; 675 676 /* process this interrupt-read even if there are no ports open */ 677 if (length) { 678 usb_serial_debug_data(dev, __func__, length, data); 679 680 if (length > 1) { 681 bytes_avail = data[0] | (data[1] << 8); 682 if (bytes_avail) { 683 spin_lock_irqsave(&edge_serial->es_lock, flags); 684 edge_serial->rxBytesAvail += bytes_avail; 685 dev_dbg(dev, 686 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n", 687 __func__, bytes_avail, 688 edge_serial->rxBytesAvail, 689 edge_serial->read_in_progress); 690 691 if (edge_serial->rxBytesAvail > 0 && 692 !edge_serial->read_in_progress) { 693 dev_dbg(dev, "%s - posting a read\n", __func__); 694 edge_serial->read_in_progress = true; 695 696 /* we have pending bytes on the 697 bulk in pipe, send a request */ 698 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 699 if (result) { 700 dev_err(dev, 701 "%s - usb_submit_urb(read bulk) failed with result = %d\n", 702 __func__, result); 703 edge_serial->read_in_progress = false; 704 } 705 } 706 spin_unlock_irqrestore(&edge_serial->es_lock, 707 flags); 708 } 709 } 710 /* grab the txcredits for the ports if available */ 711 position = 2; 712 portNumber = 0; 713 while ((position < length) && 714 (portNumber < edge_serial->serial->num_ports)) { 715 txCredits = data[position] | (data[position+1] << 8); 716 if (txCredits) { 717 port = edge_serial->serial->port[portNumber]; 718 edge_port = usb_get_serial_port_data(port); 719 if (edge_port->open) { 720 spin_lock_irqsave(&edge_port->ep_lock, 721 flags); 722 edge_port->txCredits += txCredits; 723 spin_unlock_irqrestore(&edge_port->ep_lock, 724 flags); 725 dev_dbg(dev, "%s - txcredits for port%d = %d\n", 726 __func__, portNumber, 727 edge_port->txCredits); 728 729 /* tell the tty driver that something 730 has changed */ 731 tty_port_tty_wakeup(&edge_port->port->port); 732 /* Since we have more credit, check 733 if more data can be sent */ 734 send_more_port_data(edge_serial, 735 edge_port); 736 } 737 } 738 position += 2; 739 ++portNumber; 740 } 741 } 742 743 exit: 744 result = usb_submit_urb(urb, GFP_ATOMIC); 745 if (result) 746 dev_err(&urb->dev->dev, 747 "%s - Error %d submitting control urb\n", 748 __func__, result); 749 } 750 751 752 /***************************************************************************** 753 * edge_bulk_in_callback 754 * this is the callback function for when we have received data on the 755 * bulk in endpoint. 756 *****************************************************************************/ 757 static void edge_bulk_in_callback(struct urb *urb) 758 { 759 struct edgeport_serial *edge_serial = urb->context; 760 struct device *dev; 761 unsigned char *data = urb->transfer_buffer; 762 int retval; 763 __u16 raw_data_length; 764 int status = urb->status; 765 unsigned long flags; 766 767 if (status) { 768 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", 769 __func__, status); 770 edge_serial->read_in_progress = false; 771 return; 772 } 773 774 if (urb->actual_length == 0) { 775 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__); 776 edge_serial->read_in_progress = false; 777 return; 778 } 779 780 dev = &edge_serial->serial->dev->dev; 781 raw_data_length = urb->actual_length; 782 783 usb_serial_debug_data(dev, __func__, raw_data_length, data); 784 785 spin_lock_irqsave(&edge_serial->es_lock, flags); 786 787 /* decrement our rxBytes available by the number that we just got */ 788 edge_serial->rxBytesAvail -= raw_data_length; 789 790 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__, 791 raw_data_length, edge_serial->rxBytesAvail); 792 793 process_rcvd_data(edge_serial, data, urb->actual_length); 794 795 /* check to see if there's any more data for us to read */ 796 if (edge_serial->rxBytesAvail > 0) { 797 dev_dbg(dev, "%s - posting a read\n", __func__); 798 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); 799 if (retval) { 800 dev_err(dev, 801 "%s - usb_submit_urb(read bulk) failed, retval = %d\n", 802 __func__, retval); 803 edge_serial->read_in_progress = false; 804 } 805 } else { 806 edge_serial->read_in_progress = false; 807 } 808 809 spin_unlock_irqrestore(&edge_serial->es_lock, flags); 810 } 811 812 813 /***************************************************************************** 814 * edge_bulk_out_data_callback 815 * this is the callback function for when we have finished sending 816 * serial data on the bulk out endpoint. 817 *****************************************************************************/ 818 static void edge_bulk_out_data_callback(struct urb *urb) 819 { 820 struct edgeport_port *edge_port = urb->context; 821 int status = urb->status; 822 823 if (status) { 824 dev_dbg(&urb->dev->dev, 825 "%s - nonzero write bulk status received: %d\n", 826 __func__, status); 827 } 828 829 if (edge_port->open) 830 tty_port_tty_wakeup(&edge_port->port->port); 831 832 /* Release the Write URB */ 833 edge_port->write_in_progress = false; 834 835 /* Check if more data needs to be sent */ 836 send_more_port_data((struct edgeport_serial *) 837 (usb_get_serial_data(edge_port->port->serial)), edge_port); 838 } 839 840 841 /***************************************************************************** 842 * BulkOutCmdCallback 843 * this is the callback function for when we have finished sending a 844 * command on the bulk out endpoint. 845 *****************************************************************************/ 846 static void edge_bulk_out_cmd_callback(struct urb *urb) 847 { 848 struct edgeport_port *edge_port = urb->context; 849 int status = urb->status; 850 851 atomic_dec(&CmdUrbs); 852 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n", 853 __func__, urb, atomic_read(&CmdUrbs)); 854 855 856 /* clean up the transfer buffer */ 857 kfree(urb->transfer_buffer); 858 859 /* Free the command urb */ 860 usb_free_urb(urb); 861 862 if (status) { 863 dev_dbg(&urb->dev->dev, 864 "%s - nonzero write bulk status received: %d\n", 865 __func__, status); 866 return; 867 } 868 869 /* tell the tty driver that something has changed */ 870 if (edge_port->open) 871 tty_port_tty_wakeup(&edge_port->port->port); 872 873 /* we have completed the command */ 874 edge_port->commandPending = false; 875 wake_up(&edge_port->wait_command); 876 } 877 878 879 /***************************************************************************** 880 * Driver tty interface functions 881 *****************************************************************************/ 882 883 /***************************************************************************** 884 * SerialOpen 885 * this function is called by the tty driver when a port is opened 886 * If successful, we return 0 887 * Otherwise we return a negative error number. 888 *****************************************************************************/ 889 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 890 { 891 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 892 struct device *dev = &port->dev; 893 struct usb_serial *serial; 894 struct edgeport_serial *edge_serial; 895 int response; 896 897 if (edge_port == NULL) 898 return -ENODEV; 899 900 /* see if we've set up our endpoint info yet (can't set it up 901 in edge_startup as the structures were not set up at that time.) */ 902 serial = port->serial; 903 edge_serial = usb_get_serial_data(serial); 904 if (edge_serial == NULL) 905 return -ENODEV; 906 if (edge_serial->interrupt_in_buffer == NULL) { 907 struct usb_serial_port *port0 = serial->port[0]; 908 909 /* not set up yet, so do it now */ 910 edge_serial->interrupt_in_buffer = 911 port0->interrupt_in_buffer; 912 edge_serial->interrupt_in_endpoint = 913 port0->interrupt_in_endpointAddress; 914 edge_serial->interrupt_read_urb = port0->interrupt_in_urb; 915 edge_serial->bulk_in_buffer = port0->bulk_in_buffer; 916 edge_serial->bulk_in_endpoint = 917 port0->bulk_in_endpointAddress; 918 edge_serial->read_urb = port0->read_urb; 919 edge_serial->bulk_out_endpoint = 920 port0->bulk_out_endpointAddress; 921 922 /* set up our interrupt urb */ 923 usb_fill_int_urb(edge_serial->interrupt_read_urb, 924 serial->dev, 925 usb_rcvintpipe(serial->dev, 926 port0->interrupt_in_endpointAddress), 927 port0->interrupt_in_buffer, 928 edge_serial->interrupt_read_urb->transfer_buffer_length, 929 edge_interrupt_callback, edge_serial, 930 edge_serial->interrupt_read_urb->interval); 931 932 /* set up our bulk in urb */ 933 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, 934 usb_rcvbulkpipe(serial->dev, 935 port0->bulk_in_endpointAddress), 936 port0->bulk_in_buffer, 937 edge_serial->read_urb->transfer_buffer_length, 938 edge_bulk_in_callback, edge_serial); 939 edge_serial->read_in_progress = false; 940 941 /* start interrupt read for this edgeport 942 * this interrupt will continue as long 943 * as the edgeport is connected */ 944 response = usb_submit_urb(edge_serial->interrupt_read_urb, 945 GFP_KERNEL); 946 if (response) { 947 dev_err(dev, "%s - Error %d submitting control urb\n", 948 __func__, response); 949 } 950 } 951 952 /* initialize our wait queues */ 953 init_waitqueue_head(&edge_port->wait_open); 954 init_waitqueue_head(&edge_port->wait_chase); 955 init_waitqueue_head(&edge_port->wait_command); 956 957 /* initialize our port settings */ 958 edge_port->txCredits = 0; /* Can't send any data yet */ 959 /* Must always set this bit to enable ints! */ 960 edge_port->shadowMCR = MCR_MASTER_IE; 961 edge_port->chaseResponsePending = false; 962 963 /* send a open port command */ 964 edge_port->openPending = true; 965 edge_port->open = false; 966 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); 967 968 if (response < 0) { 969 dev_err(dev, "%s - error sending open port command\n", __func__); 970 edge_port->openPending = false; 971 return -ENODEV; 972 } 973 974 /* now wait for the port to be completely opened */ 975 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, 976 OPEN_TIMEOUT); 977 978 if (!edge_port->open) { 979 /* open timed out */ 980 dev_dbg(dev, "%s - open timedout\n", __func__); 981 edge_port->openPending = false; 982 return -ENODEV; 983 } 984 985 /* create the txfifo */ 986 edge_port->txfifo.head = 0; 987 edge_port->txfifo.tail = 0; 988 edge_port->txfifo.count = 0; 989 edge_port->txfifo.size = edge_port->maxTxCredits; 990 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); 991 992 if (!edge_port->txfifo.fifo) { 993 edge_close(port); 994 return -ENOMEM; 995 } 996 997 /* Allocate a URB for the write */ 998 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 999 edge_port->write_in_progress = false; 1000 1001 if (!edge_port->write_urb) { 1002 edge_close(port); 1003 return -ENOMEM; 1004 } 1005 1006 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n", 1007 __func__, edge_port->maxTxCredits); 1008 1009 return 0; 1010 } 1011 1012 1013 /************************************************************************ 1014 * 1015 * block_until_chase_response 1016 * 1017 * This function will block the close until one of the following: 1018 * 1. Response to our Chase comes from Edgeport 1019 * 2. A timeout of 10 seconds without activity has expired 1020 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) 1021 * 1022 ************************************************************************/ 1023 static void block_until_chase_response(struct edgeport_port *edge_port) 1024 { 1025 struct device *dev = &edge_port->port->dev; 1026 DEFINE_WAIT(wait); 1027 __u16 lastCredits; 1028 int timeout = 1*HZ; 1029 int loop = 10; 1030 1031 while (1) { 1032 /* Save Last credits */ 1033 lastCredits = edge_port->txCredits; 1034 1035 /* Did we get our Chase response */ 1036 if (!edge_port->chaseResponsePending) { 1037 dev_dbg(dev, "%s - Got Chase Response\n", __func__); 1038 1039 /* did we get all of our credit back? */ 1040 if (edge_port->txCredits == edge_port->maxTxCredits) { 1041 dev_dbg(dev, "%s - Got all credits\n", __func__); 1042 return; 1043 } 1044 } 1045 1046 /* Block the thread for a while */ 1047 prepare_to_wait(&edge_port->wait_chase, &wait, 1048 TASK_UNINTERRUPTIBLE); 1049 schedule_timeout(timeout); 1050 finish_wait(&edge_port->wait_chase, &wait); 1051 1052 if (lastCredits == edge_port->txCredits) { 1053 /* No activity.. count down. */ 1054 loop--; 1055 if (loop == 0) { 1056 edge_port->chaseResponsePending = false; 1057 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__); 1058 return; 1059 } 1060 } else { 1061 /* Reset timeout value back to 10 seconds */ 1062 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__, 1063 lastCredits, edge_port->txCredits); 1064 loop = 10; 1065 } 1066 } 1067 } 1068 1069 1070 /************************************************************************ 1071 * 1072 * block_until_tx_empty 1073 * 1074 * This function will block the close until one of the following: 1075 * 1. TX count are 0 1076 * 2. The edgeport has stopped 1077 * 3. A timeout of 3 seconds without activity has expired 1078 * 1079 ************************************************************************/ 1080 static void block_until_tx_empty(struct edgeport_port *edge_port) 1081 { 1082 struct device *dev = &edge_port->port->dev; 1083 DEFINE_WAIT(wait); 1084 struct TxFifo *fifo = &edge_port->txfifo; 1085 __u32 lastCount; 1086 int timeout = HZ/10; 1087 int loop = 30; 1088 1089 while (1) { 1090 /* Save Last count */ 1091 lastCount = fifo->count; 1092 1093 /* Is the Edgeport Buffer empty? */ 1094 if (lastCount == 0) { 1095 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__); 1096 return; 1097 } 1098 1099 /* Block the thread for a while */ 1100 prepare_to_wait(&edge_port->wait_chase, &wait, 1101 TASK_UNINTERRUPTIBLE); 1102 schedule_timeout(timeout); 1103 finish_wait(&edge_port->wait_chase, &wait); 1104 1105 dev_dbg(dev, "%s wait\n", __func__); 1106 1107 if (lastCount == fifo->count) { 1108 /* No activity.. count down. */ 1109 loop--; 1110 if (loop == 0) { 1111 dev_dbg(dev, "%s - TIMEOUT\n", __func__); 1112 return; 1113 } 1114 } else { 1115 /* Reset timeout value back to seconds */ 1116 loop = 30; 1117 } 1118 } 1119 } 1120 1121 1122 /***************************************************************************** 1123 * edge_close 1124 * this function is called by the tty driver when a port is closed 1125 *****************************************************************************/ 1126 static void edge_close(struct usb_serial_port *port) 1127 { 1128 struct edgeport_serial *edge_serial; 1129 struct edgeport_port *edge_port; 1130 int status; 1131 1132 edge_serial = usb_get_serial_data(port->serial); 1133 edge_port = usb_get_serial_port_data(port); 1134 if (edge_serial == NULL || edge_port == NULL) 1135 return; 1136 1137 /* block until tx is empty */ 1138 block_until_tx_empty(edge_port); 1139 1140 edge_port->closePending = true; 1141 1142 if (!edge_serial->is_epic || 1143 edge_serial->epic_descriptor.Supports.IOSPChase) { 1144 /* flush and chase */ 1145 edge_port->chaseResponsePending = true; 1146 1147 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1148 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1149 if (status == 0) 1150 /* block until chase finished */ 1151 block_until_chase_response(edge_port); 1152 else 1153 edge_port->chaseResponsePending = false; 1154 } 1155 1156 if (!edge_serial->is_epic || 1157 edge_serial->epic_descriptor.Supports.IOSPClose) { 1158 /* close the port */ 1159 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__); 1160 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); 1161 } 1162 1163 /* port->close = true; */ 1164 edge_port->closePending = false; 1165 edge_port->open = false; 1166 edge_port->openPending = false; 1167 1168 usb_kill_urb(edge_port->write_urb); 1169 1170 if (edge_port->write_urb) { 1171 /* if this urb had a transfer buffer already 1172 (old transfer) free it */ 1173 kfree(edge_port->write_urb->transfer_buffer); 1174 usb_free_urb(edge_port->write_urb); 1175 edge_port->write_urb = NULL; 1176 } 1177 kfree(edge_port->txfifo.fifo); 1178 edge_port->txfifo.fifo = NULL; 1179 } 1180 1181 /***************************************************************************** 1182 * SerialWrite 1183 * this function is called by the tty driver when data should be written 1184 * to the port. 1185 * If successful, we return the number of bytes written, otherwise we 1186 * return a negative error number. 1187 *****************************************************************************/ 1188 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1189 const unsigned char *data, int count) 1190 { 1191 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1192 struct TxFifo *fifo; 1193 int copySize; 1194 int bytesleft; 1195 int firsthalf; 1196 int secondhalf; 1197 unsigned long flags; 1198 1199 if (edge_port == NULL) 1200 return -ENODEV; 1201 1202 /* get a pointer to the Tx fifo */ 1203 fifo = &edge_port->txfifo; 1204 1205 spin_lock_irqsave(&edge_port->ep_lock, flags); 1206 1207 /* calculate number of bytes to put in fifo */ 1208 copySize = min((unsigned int)count, 1209 (edge_port->txCredits - fifo->count)); 1210 1211 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n", 1212 __func__, count, edge_port->txCredits - fifo->count, copySize); 1213 1214 /* catch writes of 0 bytes which the tty driver likes to give us, 1215 and when txCredits is empty */ 1216 if (copySize == 0) { 1217 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__); 1218 goto finish_write; 1219 } 1220 1221 /* queue the data 1222 * since we can never overflow the buffer we do not have to check for a 1223 * full condition 1224 * 1225 * the copy is done is two parts -- first fill to the end of the buffer 1226 * then copy the reset from the start of the buffer 1227 */ 1228 bytesleft = fifo->size - fifo->head; 1229 firsthalf = min(bytesleft, copySize); 1230 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__, 1231 firsthalf, bytesleft); 1232 1233 /* now copy our data */ 1234 memcpy(&fifo->fifo[fifo->head], data, firsthalf); 1235 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]); 1236 1237 /* update the index and size */ 1238 fifo->head += firsthalf; 1239 fifo->count += firsthalf; 1240 1241 /* wrap the index */ 1242 if (fifo->head == fifo->size) 1243 fifo->head = 0; 1244 1245 secondhalf = copySize-firsthalf; 1246 1247 if (secondhalf) { 1248 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf); 1249 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); 1250 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]); 1251 /* update the index and size */ 1252 fifo->count += secondhalf; 1253 fifo->head += secondhalf; 1254 /* No need to check for wrap since we can not get to end of 1255 * the fifo in this part 1256 */ 1257 } 1258 1259 finish_write: 1260 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1261 1262 send_more_port_data((struct edgeport_serial *) 1263 usb_get_serial_data(port->serial), edge_port); 1264 1265 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n", 1266 __func__, copySize, edge_port->txCredits, fifo->count); 1267 1268 return copySize; 1269 } 1270 1271 1272 /************************************************************************ 1273 * 1274 * send_more_port_data() 1275 * 1276 * This routine attempts to write additional UART transmit data 1277 * to a port over the USB bulk pipe. It is called (1) when new 1278 * data has been written to a port's TxBuffer from higher layers 1279 * (2) when the peripheral sends us additional TxCredits indicating 1280 * that it can accept more Tx data for a given port; and (3) when 1281 * a bulk write completes successfully and we want to see if we 1282 * can transmit more. 1283 * 1284 ************************************************************************/ 1285 static void send_more_port_data(struct edgeport_serial *edge_serial, 1286 struct edgeport_port *edge_port) 1287 { 1288 struct TxFifo *fifo = &edge_port->txfifo; 1289 struct device *dev = &edge_port->port->dev; 1290 struct urb *urb; 1291 unsigned char *buffer; 1292 int status; 1293 int count; 1294 int bytesleft; 1295 int firsthalf; 1296 int secondhalf; 1297 unsigned long flags; 1298 1299 spin_lock_irqsave(&edge_port->ep_lock, flags); 1300 1301 if (edge_port->write_in_progress || 1302 !edge_port->open || 1303 (fifo->count == 0)) { 1304 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n", 1305 __func__, fifo->count, edge_port->write_in_progress); 1306 goto exit_send; 1307 } 1308 1309 /* since the amount of data in the fifo will always fit into the 1310 * edgeport buffer we do not need to check the write length 1311 * 1312 * Do we have enough credits for this port to make it worthwhile 1313 * to bother queueing a write. If it's too small, say a few bytes, 1314 * it's better to wait for more credits so we can do a larger write. 1315 */ 1316 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { 1317 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n", 1318 __func__, fifo->count, edge_port->txCredits); 1319 goto exit_send; 1320 } 1321 1322 /* lock this write */ 1323 edge_port->write_in_progress = true; 1324 1325 /* get a pointer to the write_urb */ 1326 urb = edge_port->write_urb; 1327 1328 /* make sure transfer buffer is freed */ 1329 kfree(urb->transfer_buffer); 1330 urb->transfer_buffer = NULL; 1331 1332 /* build the data header for the buffer and port that we are about 1333 to send out */ 1334 count = fifo->count; 1335 buffer = kmalloc(count+2, GFP_ATOMIC); 1336 if (!buffer) { 1337 edge_port->write_in_progress = false; 1338 goto exit_send; 1339 } 1340 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count); 1341 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count); 1342 1343 /* now copy our data */ 1344 bytesleft = fifo->size - fifo->tail; 1345 firsthalf = min(bytesleft, count); 1346 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); 1347 fifo->tail += firsthalf; 1348 fifo->count -= firsthalf; 1349 if (fifo->tail == fifo->size) 1350 fifo->tail = 0; 1351 1352 secondhalf = count-firsthalf; 1353 if (secondhalf) { 1354 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], 1355 secondhalf); 1356 fifo->tail += secondhalf; 1357 fifo->count -= secondhalf; 1358 } 1359 1360 if (count) 1361 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]); 1362 1363 /* fill up the urb with all of our data and submit it */ 1364 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 1365 usb_sndbulkpipe(edge_serial->serial->dev, 1366 edge_serial->bulk_out_endpoint), 1367 buffer, count+2, 1368 edge_bulk_out_data_callback, edge_port); 1369 1370 /* decrement the number of credits we have by the number we just sent */ 1371 edge_port->txCredits -= count; 1372 edge_port->port->icount.tx += count; 1373 1374 status = usb_submit_urb(urb, GFP_ATOMIC); 1375 if (status) { 1376 /* something went wrong */ 1377 dev_err_console(edge_port->port, 1378 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", 1379 __func__, status); 1380 edge_port->write_in_progress = false; 1381 1382 /* revert the credits as something bad happened. */ 1383 edge_port->txCredits += count; 1384 edge_port->port->icount.tx -= count; 1385 } 1386 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n", 1387 __func__, count, edge_port->txCredits, fifo->count); 1388 1389 exit_send: 1390 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1391 } 1392 1393 1394 /***************************************************************************** 1395 * edge_write_room 1396 * this function is called by the tty driver when it wants to know how 1397 * many bytes of data we can accept for a specific port. If successful, 1398 * we return the amount of room that we have for this port (the txCredits) 1399 * otherwise we return a negative error number. 1400 *****************************************************************************/ 1401 static int edge_write_room(struct tty_struct *tty) 1402 { 1403 struct usb_serial_port *port = tty->driver_data; 1404 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1405 int room; 1406 unsigned long flags; 1407 1408 if (edge_port == NULL) 1409 return 0; 1410 if (edge_port->closePending) 1411 return 0; 1412 1413 if (!edge_port->open) { 1414 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1415 return 0; 1416 } 1417 1418 /* total of both buffers is still txCredit */ 1419 spin_lock_irqsave(&edge_port->ep_lock, flags); 1420 room = edge_port->txCredits - edge_port->txfifo.count; 1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1422 1423 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 1424 return room; 1425 } 1426 1427 1428 /***************************************************************************** 1429 * edge_chars_in_buffer 1430 * this function is called by the tty driver when it wants to know how 1431 * many bytes of data we currently have outstanding in the port (data that 1432 * has been written, but hasn't made it out the port yet) 1433 * If successful, we return the number of bytes left to be written in the 1434 * system, 1435 * Otherwise we return a negative error number. 1436 *****************************************************************************/ 1437 static int edge_chars_in_buffer(struct tty_struct *tty) 1438 { 1439 struct usb_serial_port *port = tty->driver_data; 1440 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1441 int num_chars; 1442 unsigned long flags; 1443 1444 if (edge_port == NULL) 1445 return 0; 1446 if (edge_port->closePending) 1447 return 0; 1448 1449 if (!edge_port->open) { 1450 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1451 return 0; 1452 } 1453 1454 spin_lock_irqsave(&edge_port->ep_lock, flags); 1455 num_chars = edge_port->maxTxCredits - edge_port->txCredits + 1456 edge_port->txfifo.count; 1457 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1458 if (num_chars) { 1459 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars); 1460 } 1461 1462 return num_chars; 1463 } 1464 1465 1466 /***************************************************************************** 1467 * SerialThrottle 1468 * this function is called by the tty driver when it wants to stop the data 1469 * being read from the port. 1470 *****************************************************************************/ 1471 static void edge_throttle(struct tty_struct *tty) 1472 { 1473 struct usb_serial_port *port = tty->driver_data; 1474 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1475 int status; 1476 1477 if (edge_port == NULL) 1478 return; 1479 1480 if (!edge_port->open) { 1481 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1482 return; 1483 } 1484 1485 /* if we are implementing XON/XOFF, send the stop character */ 1486 if (I_IXOFF(tty)) { 1487 unsigned char stop_char = STOP_CHAR(tty); 1488 status = edge_write(tty, port, &stop_char, 1); 1489 if (status <= 0) 1490 return; 1491 } 1492 1493 /* if we are implementing RTS/CTS, toggle that line */ 1494 if (C_CRTSCTS(tty)) { 1495 edge_port->shadowMCR &= ~MCR_RTS; 1496 status = send_cmd_write_uart_register(edge_port, MCR, 1497 edge_port->shadowMCR); 1498 if (status != 0) 1499 return; 1500 } 1501 } 1502 1503 1504 /***************************************************************************** 1505 * edge_unthrottle 1506 * this function is called by the tty driver when it wants to resume the 1507 * data being read from the port (called after SerialThrottle is called) 1508 *****************************************************************************/ 1509 static void edge_unthrottle(struct tty_struct *tty) 1510 { 1511 struct usb_serial_port *port = tty->driver_data; 1512 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1513 int status; 1514 1515 if (edge_port == NULL) 1516 return; 1517 1518 if (!edge_port->open) { 1519 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1520 return; 1521 } 1522 1523 /* if we are implementing XON/XOFF, send the start character */ 1524 if (I_IXOFF(tty)) { 1525 unsigned char start_char = START_CHAR(tty); 1526 status = edge_write(tty, port, &start_char, 1); 1527 if (status <= 0) 1528 return; 1529 } 1530 /* if we are implementing RTS/CTS, toggle that line */ 1531 if (C_CRTSCTS(tty)) { 1532 edge_port->shadowMCR |= MCR_RTS; 1533 send_cmd_write_uart_register(edge_port, MCR, 1534 edge_port->shadowMCR); 1535 } 1536 } 1537 1538 1539 /***************************************************************************** 1540 * SerialSetTermios 1541 * this function is called by the tty driver when it wants to change 1542 * the termios structure 1543 *****************************************************************************/ 1544 static void edge_set_termios(struct tty_struct *tty, 1545 struct usb_serial_port *port, struct ktermios *old_termios) 1546 { 1547 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1548 1549 if (edge_port == NULL) 1550 return; 1551 1552 if (!edge_port->open) { 1553 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1554 return; 1555 } 1556 1557 /* change the port settings to the new ones specified */ 1558 change_port_settings(tty, edge_port, old_termios); 1559 } 1560 1561 1562 /***************************************************************************** 1563 * get_lsr_info - get line status register info 1564 * 1565 * Purpose: Let user call ioctl() to get info when the UART physically 1566 * is emptied. On bus types like RS485, the transmitter must 1567 * release the bus after transmitting. This must be done when 1568 * the transmit shift register is empty, not be done when the 1569 * transmit holding register is empty. This functionality 1570 * allows an RS485 driver to be written in user space. 1571 *****************************************************************************/ 1572 static int get_lsr_info(struct edgeport_port *edge_port, 1573 unsigned int __user *value) 1574 { 1575 unsigned int result = 0; 1576 unsigned long flags; 1577 1578 spin_lock_irqsave(&edge_port->ep_lock, flags); 1579 if (edge_port->maxTxCredits == edge_port->txCredits && 1580 edge_port->txfifo.count == 0) { 1581 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__); 1582 result = TIOCSER_TEMT; 1583 } 1584 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1585 1586 if (copy_to_user(value, &result, sizeof(int))) 1587 return -EFAULT; 1588 return 0; 1589 } 1590 1591 static int edge_tiocmset(struct tty_struct *tty, 1592 unsigned int set, unsigned int clear) 1593 { 1594 struct usb_serial_port *port = tty->driver_data; 1595 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1596 unsigned int mcr; 1597 1598 mcr = edge_port->shadowMCR; 1599 if (set & TIOCM_RTS) 1600 mcr |= MCR_RTS; 1601 if (set & TIOCM_DTR) 1602 mcr |= MCR_DTR; 1603 if (set & TIOCM_LOOP) 1604 mcr |= MCR_LOOPBACK; 1605 1606 if (clear & TIOCM_RTS) 1607 mcr &= ~MCR_RTS; 1608 if (clear & TIOCM_DTR) 1609 mcr &= ~MCR_DTR; 1610 if (clear & TIOCM_LOOP) 1611 mcr &= ~MCR_LOOPBACK; 1612 1613 edge_port->shadowMCR = mcr; 1614 1615 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); 1616 1617 return 0; 1618 } 1619 1620 static int edge_tiocmget(struct tty_struct *tty) 1621 { 1622 struct usb_serial_port *port = tty->driver_data; 1623 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1624 unsigned int result = 0; 1625 unsigned int msr; 1626 unsigned int mcr; 1627 1628 msr = edge_port->shadowMSR; 1629 mcr = edge_port->shadowMCR; 1630 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 1631 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 1632 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 1633 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 1634 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 1635 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 1636 1637 return result; 1638 } 1639 1640 static int get_serial_info(struct tty_struct *tty, 1641 struct serial_struct *ss) 1642 { 1643 struct usb_serial_port *port = tty->driver_data; 1644 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1645 1646 ss->type = PORT_16550A; 1647 ss->line = edge_port->port->minor; 1648 ss->port = edge_port->port->port_number; 1649 ss->irq = 0; 1650 ss->xmit_fifo_size = edge_port->maxTxCredits; 1651 ss->baud_base = 9600; 1652 ss->close_delay = 5*HZ; 1653 ss->closing_wait = 30*HZ; 1654 return 0; 1655 } 1656 1657 1658 /***************************************************************************** 1659 * SerialIoctl 1660 * this function handles any ioctl calls to the driver 1661 *****************************************************************************/ 1662 static int edge_ioctl(struct tty_struct *tty, 1663 unsigned int cmd, unsigned long arg) 1664 { 1665 struct usb_serial_port *port = tty->driver_data; 1666 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1667 1668 switch (cmd) { 1669 case TIOCSERGETLSR: 1670 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1671 return get_lsr_info(edge_port, (unsigned int __user *) arg); 1672 } 1673 return -ENOIOCTLCMD; 1674 } 1675 1676 1677 /***************************************************************************** 1678 * SerialBreak 1679 * this function sends a break to the port 1680 *****************************************************************************/ 1681 static void edge_break(struct tty_struct *tty, int break_state) 1682 { 1683 struct usb_serial_port *port = tty->driver_data; 1684 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1685 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); 1686 int status; 1687 1688 if (!edge_serial->is_epic || 1689 edge_serial->epic_descriptor.Supports.IOSPChase) { 1690 /* flush and chase */ 1691 edge_port->chaseResponsePending = true; 1692 1693 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); 1694 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); 1695 if (status == 0) { 1696 /* block until chase finished */ 1697 block_until_chase_response(edge_port); 1698 } else { 1699 edge_port->chaseResponsePending = false; 1700 } 1701 } 1702 1703 if (!edge_serial->is_epic || 1704 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) { 1705 if (break_state == -1) { 1706 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__); 1707 status = send_iosp_ext_cmd(edge_port, 1708 IOSP_CMD_SET_BREAK, 0); 1709 } else { 1710 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__); 1711 status = send_iosp_ext_cmd(edge_port, 1712 IOSP_CMD_CLEAR_BREAK, 0); 1713 } 1714 if (status) 1715 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n", 1716 __func__); 1717 } 1718 } 1719 1720 1721 /***************************************************************************** 1722 * process_rcvd_data 1723 * this function handles the data received on the bulk in pipe. 1724 *****************************************************************************/ 1725 static void process_rcvd_data(struct edgeport_serial *edge_serial, 1726 unsigned char *buffer, __u16 bufferLength) 1727 { 1728 struct device *dev = &edge_serial->serial->dev->dev; 1729 struct usb_serial_port *port; 1730 struct edgeport_port *edge_port; 1731 __u16 lastBufferLength; 1732 __u16 rxLen; 1733 1734 lastBufferLength = bufferLength + 1; 1735 1736 while (bufferLength > 0) { 1737 /* failsafe incase we get a message that we don't understand */ 1738 if (lastBufferLength == bufferLength) { 1739 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__); 1740 break; 1741 } 1742 lastBufferLength = bufferLength; 1743 1744 switch (edge_serial->rxState) { 1745 case EXPECT_HDR1: 1746 edge_serial->rxHeader1 = *buffer; 1747 ++buffer; 1748 --bufferLength; 1749 1750 if (bufferLength == 0) { 1751 edge_serial->rxState = EXPECT_HDR2; 1752 break; 1753 } 1754 /* Fall through */ 1755 case EXPECT_HDR2: 1756 edge_serial->rxHeader2 = *buffer; 1757 ++buffer; 1758 --bufferLength; 1759 1760 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__, 1761 edge_serial->rxHeader1, edge_serial->rxHeader2); 1762 /* Process depending on whether this header is 1763 * data or status */ 1764 1765 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { 1766 /* Decode this status header and go to 1767 * EXPECT_HDR1 (if we can process the status 1768 * with only 2 bytes), or go to EXPECT_HDR3 to 1769 * get the third byte. */ 1770 edge_serial->rxPort = 1771 IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1772 edge_serial->rxStatusCode = 1773 IOSP_GET_STATUS_CODE( 1774 edge_serial->rxHeader1); 1775 1776 if (!IOSP_STATUS_IS_2BYTE( 1777 edge_serial->rxStatusCode)) { 1778 /* This status needs additional bytes. 1779 * Save what we have and then wait for 1780 * more data. 1781 */ 1782 edge_serial->rxStatusParam 1783 = edge_serial->rxHeader2; 1784 edge_serial->rxState = EXPECT_HDR3; 1785 break; 1786 } 1787 /* We have all the header bytes, process the 1788 status now */ 1789 process_rcvd_status(edge_serial, 1790 edge_serial->rxHeader2, 0); 1791 edge_serial->rxState = EXPECT_HDR1; 1792 break; 1793 } 1794 1795 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); 1796 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, 1797 edge_serial->rxHeader2); 1798 dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__, 1799 edge_serial->rxPort, 1800 edge_serial->rxBytesRemaining); 1801 1802 if (bufferLength == 0) { 1803 edge_serial->rxState = EXPECT_DATA; 1804 break; 1805 } 1806 /* Fall through */ 1807 case EXPECT_DATA: /* Expect data */ 1808 if (bufferLength < edge_serial->rxBytesRemaining) { 1809 rxLen = bufferLength; 1810 /* Expect data to start next buffer */ 1811 edge_serial->rxState = EXPECT_DATA; 1812 } else { 1813 /* BufLen >= RxBytesRemaining */ 1814 rxLen = edge_serial->rxBytesRemaining; 1815 /* Start another header next time */ 1816 edge_serial->rxState = EXPECT_HDR1; 1817 } 1818 1819 bufferLength -= rxLen; 1820 edge_serial->rxBytesRemaining -= rxLen; 1821 1822 /* spit this data back into the tty driver if this 1823 port is open */ 1824 if (rxLen) { 1825 port = edge_serial->serial->port[ 1826 edge_serial->rxPort]; 1827 edge_port = usb_get_serial_port_data(port); 1828 if (edge_port->open) { 1829 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", 1830 __func__, rxLen, 1831 edge_serial->rxPort); 1832 edge_tty_recv(edge_port->port, buffer, 1833 rxLen); 1834 edge_port->port->icount.rx += rxLen; 1835 } 1836 buffer += rxLen; 1837 } 1838 break; 1839 1840 case EXPECT_HDR3: /* Expect 3rd byte of status header */ 1841 edge_serial->rxHeader3 = *buffer; 1842 ++buffer; 1843 --bufferLength; 1844 1845 /* We have all the header bytes, process the 1846 status now */ 1847 process_rcvd_status(edge_serial, 1848 edge_serial->rxStatusParam, 1849 edge_serial->rxHeader3); 1850 edge_serial->rxState = EXPECT_HDR1; 1851 break; 1852 } 1853 } 1854 } 1855 1856 1857 /***************************************************************************** 1858 * process_rcvd_status 1859 * this function handles the any status messages received on the 1860 * bulk in pipe. 1861 *****************************************************************************/ 1862 static void process_rcvd_status(struct edgeport_serial *edge_serial, 1863 __u8 byte2, __u8 byte3) 1864 { 1865 struct usb_serial_port *port; 1866 struct edgeport_port *edge_port; 1867 struct tty_struct *tty; 1868 struct device *dev; 1869 __u8 code = edge_serial->rxStatusCode; 1870 1871 /* switch the port pointer to the one being currently talked about */ 1872 port = edge_serial->serial->port[edge_serial->rxPort]; 1873 edge_port = usb_get_serial_port_data(port); 1874 if (edge_port == NULL) { 1875 dev_err(&edge_serial->serial->dev->dev, 1876 "%s - edge_port == NULL for port %d\n", 1877 __func__, edge_serial->rxPort); 1878 return; 1879 } 1880 dev = &port->dev; 1881 1882 if (code == IOSP_EXT_STATUS) { 1883 switch (byte2) { 1884 case IOSP_EXT_STATUS_CHASE_RSP: 1885 /* we want to do EXT status regardless of port 1886 * open/closed */ 1887 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n", 1888 __func__, edge_serial->rxPort, byte3); 1889 /* Currently, the only EXT_STATUS is Chase, so process 1890 * here instead of one more call to one more subroutine 1891 * If/when more EXT_STATUS, there'll be more work to do 1892 * Also, we currently clear flag and close the port 1893 * regardless of content of above's Byte3. 1894 * We could choose to do something else when Byte3 says 1895 * Timeout on Chase from Edgeport, like wait longer in 1896 * block_until_chase_response, but for now we don't. 1897 */ 1898 edge_port->chaseResponsePending = false; 1899 wake_up(&edge_port->wait_chase); 1900 return; 1901 1902 case IOSP_EXT_STATUS_RX_CHECK_RSP: 1903 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", 1904 __func__, edge_serial->rxPort, byte3); 1905 /* Port->RxCheckRsp = true; */ 1906 return; 1907 } 1908 } 1909 1910 if (code == IOSP_STATUS_OPEN_RSP) { 1911 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); 1912 edge_port->maxTxCredits = edge_port->txCredits; 1913 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n", 1914 __func__, edge_serial->rxPort, byte2, edge_port->txCredits); 1915 handle_new_msr(edge_port, byte2); 1916 1917 /* send the current line settings to the port so we are 1918 in sync with any further termios calls */ 1919 tty = tty_port_tty_get(&edge_port->port->port); 1920 if (tty) { 1921 change_port_settings(tty, 1922 edge_port, &tty->termios); 1923 tty_kref_put(tty); 1924 } 1925 1926 /* we have completed the open */ 1927 edge_port->openPending = false; 1928 edge_port->open = true; 1929 wake_up(&edge_port->wait_open); 1930 return; 1931 } 1932 1933 /* If port is closed, silently discard all rcvd status. We can 1934 * have cases where buffered status is received AFTER the close 1935 * port command is sent to the Edgeport. 1936 */ 1937 if (!edge_port->open || edge_port->closePending) 1938 return; 1939 1940 switch (code) { 1941 /* Not currently sent by Edgeport */ 1942 case IOSP_STATUS_LSR: 1943 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n", 1944 __func__, edge_serial->rxPort, byte2); 1945 handle_new_lsr(edge_port, false, byte2, 0); 1946 break; 1947 1948 case IOSP_STATUS_LSR_DATA: 1949 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n", 1950 __func__, edge_serial->rxPort, byte2, byte3); 1951 /* byte2 is LSR Register */ 1952 /* byte3 is broken data byte */ 1953 handle_new_lsr(edge_port, true, byte2, byte3); 1954 break; 1955 /* 1956 * case IOSP_EXT_4_STATUS: 1957 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n", 1958 * __func__, edge_serial->rxPort, byte2, byte3); 1959 * break; 1960 */ 1961 case IOSP_STATUS_MSR: 1962 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n", 1963 __func__, edge_serial->rxPort, byte2); 1964 /* 1965 * Process this new modem status and generate appropriate 1966 * events, etc, based on the new status. This routine 1967 * also saves the MSR in Port->ShadowMsr. 1968 */ 1969 handle_new_msr(edge_port, byte2); 1970 break; 1971 1972 default: 1973 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code); 1974 break; 1975 } 1976 } 1977 1978 1979 /***************************************************************************** 1980 * edge_tty_recv 1981 * this function passes data on to the tty flip buffer 1982 *****************************************************************************/ 1983 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1984 int length) 1985 { 1986 int cnt; 1987 1988 cnt = tty_insert_flip_string(&port->port, data, length); 1989 if (cnt < length) { 1990 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1991 __func__, length - cnt); 1992 } 1993 data += cnt; 1994 length -= cnt; 1995 1996 tty_flip_buffer_push(&port->port); 1997 } 1998 1999 2000 /***************************************************************************** 2001 * handle_new_msr 2002 * this function handles any change to the msr register for a port. 2003 *****************************************************************************/ 2004 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) 2005 { 2006 struct async_icount *icount; 2007 2008 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 2009 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 2010 icount = &edge_port->port->icount; 2011 2012 /* update input line counters */ 2013 if (newMsr & EDGEPORT_MSR_DELTA_CTS) 2014 icount->cts++; 2015 if (newMsr & EDGEPORT_MSR_DELTA_DSR) 2016 icount->dsr++; 2017 if (newMsr & EDGEPORT_MSR_DELTA_CD) 2018 icount->dcd++; 2019 if (newMsr & EDGEPORT_MSR_DELTA_RI) 2020 icount->rng++; 2021 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 2022 } 2023 2024 /* Save the new modem status */ 2025 edge_port->shadowMSR = newMsr & 0xf0; 2026 } 2027 2028 2029 /***************************************************************************** 2030 * handle_new_lsr 2031 * this function handles any change to the lsr register for a port. 2032 *****************************************************************************/ 2033 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, 2034 __u8 lsr, __u8 data) 2035 { 2036 __u8 newLsr = (__u8) (lsr & (__u8) 2037 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); 2038 struct async_icount *icount; 2039 2040 edge_port->shadowLSR = lsr; 2041 2042 if (newLsr & LSR_BREAK) { 2043 /* 2044 * Parity and Framing errors only count if they 2045 * occur exclusive of a break being 2046 * received. 2047 */ 2048 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 2049 } 2050 2051 /* Place LSR data byte into Rx buffer */ 2052 if (lsrData) 2053 edge_tty_recv(edge_port->port, &data, 1); 2054 2055 /* update input line counters */ 2056 icount = &edge_port->port->icount; 2057 if (newLsr & LSR_BREAK) 2058 icount->brk++; 2059 if (newLsr & LSR_OVER_ERR) 2060 icount->overrun++; 2061 if (newLsr & LSR_PAR_ERR) 2062 icount->parity++; 2063 if (newLsr & LSR_FRM_ERR) 2064 icount->frame++; 2065 } 2066 2067 2068 /**************************************************************************** 2069 * sram_write 2070 * writes a number of bytes to the Edgeport device's sram starting at the 2071 * given address. 2072 * If successful returns the number of bytes written, otherwise it returns 2073 * a negative error number of the problem. 2074 ****************************************************************************/ 2075 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2076 __u16 length, const __u8 *data) 2077 { 2078 int result; 2079 __u16 current_length; 2080 unsigned char *transfer_buffer; 2081 2082 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length); 2083 2084 transfer_buffer = kmalloc(64, GFP_KERNEL); 2085 if (!transfer_buffer) 2086 return -ENOMEM; 2087 2088 /* need to split these writes up into 64 byte chunks */ 2089 result = 0; 2090 while (length > 0) { 2091 if (length > 64) 2092 current_length = 64; 2093 else 2094 current_length = length; 2095 2096 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */ 2097 memcpy(transfer_buffer, data, current_length); 2098 result = usb_control_msg(serial->dev, 2099 usb_sndctrlpipe(serial->dev, 0), 2100 USB_REQUEST_ION_WRITE_RAM, 2101 0x40, addr, extAddr, transfer_buffer, 2102 current_length, 300); 2103 if (result < 0) 2104 break; 2105 length -= current_length; 2106 addr += current_length; 2107 data += current_length; 2108 } 2109 2110 kfree(transfer_buffer); 2111 return result; 2112 } 2113 2114 2115 /**************************************************************************** 2116 * rom_write 2117 * writes a number of bytes to the Edgeport device's ROM starting at the 2118 * given address. 2119 * If successful returns the number of bytes written, otherwise it returns 2120 * a negative error number of the problem. 2121 ****************************************************************************/ 2122 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, 2123 __u16 length, const __u8 *data) 2124 { 2125 int result; 2126 __u16 current_length; 2127 unsigned char *transfer_buffer; 2128 2129 transfer_buffer = kmalloc(64, GFP_KERNEL); 2130 if (!transfer_buffer) 2131 return -ENOMEM; 2132 2133 /* need to split these writes up into 64 byte chunks */ 2134 result = 0; 2135 while (length > 0) { 2136 if (length > 64) 2137 current_length = 64; 2138 else 2139 current_length = length; 2140 memcpy(transfer_buffer, data, current_length); 2141 result = usb_control_msg(serial->dev, 2142 usb_sndctrlpipe(serial->dev, 0), 2143 USB_REQUEST_ION_WRITE_ROM, 0x40, 2144 addr, extAddr, 2145 transfer_buffer, current_length, 300); 2146 if (result < 0) 2147 break; 2148 length -= current_length; 2149 addr += current_length; 2150 data += current_length; 2151 } 2152 2153 kfree(transfer_buffer); 2154 return result; 2155 } 2156 2157 2158 /**************************************************************************** 2159 * rom_read 2160 * reads a number of bytes from the Edgeport device starting at the given 2161 * address. 2162 * Returns zero on success or a negative error number. 2163 ****************************************************************************/ 2164 static int rom_read(struct usb_serial *serial, __u16 extAddr, 2165 __u16 addr, __u16 length, __u8 *data) 2166 { 2167 int result; 2168 __u16 current_length; 2169 unsigned char *transfer_buffer; 2170 2171 transfer_buffer = kmalloc(64, GFP_KERNEL); 2172 if (!transfer_buffer) 2173 return -ENOMEM; 2174 2175 /* need to split these reads up into 64 byte chunks */ 2176 result = 0; 2177 while (length > 0) { 2178 if (length > 64) 2179 current_length = 64; 2180 else 2181 current_length = length; 2182 result = usb_control_msg(serial->dev, 2183 usb_rcvctrlpipe(serial->dev, 0), 2184 USB_REQUEST_ION_READ_ROM, 2185 0xC0, addr, extAddr, transfer_buffer, 2186 current_length, 300); 2187 if (result < current_length) { 2188 if (result >= 0) 2189 result = -EIO; 2190 break; 2191 } 2192 memcpy(data, transfer_buffer, current_length); 2193 length -= current_length; 2194 addr += current_length; 2195 data += current_length; 2196 2197 result = 0; 2198 } 2199 2200 kfree(transfer_buffer); 2201 return result; 2202 } 2203 2204 2205 /**************************************************************************** 2206 * send_iosp_ext_cmd 2207 * Is used to send a IOSP message to the Edgeport device 2208 ****************************************************************************/ 2209 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, 2210 __u8 command, __u8 param) 2211 { 2212 unsigned char *buffer; 2213 unsigned char *currentCommand; 2214 int length = 0; 2215 int status = 0; 2216 2217 buffer = kmalloc(10, GFP_ATOMIC); 2218 if (!buffer) 2219 return -ENOMEM; 2220 2221 currentCommand = buffer; 2222 2223 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number, 2224 command, param); 2225 2226 status = write_cmd_usb(edge_port, buffer, length); 2227 if (status) { 2228 /* something bad happened, let's free up the memory */ 2229 kfree(buffer); 2230 } 2231 2232 return status; 2233 } 2234 2235 2236 /***************************************************************************** 2237 * write_cmd_usb 2238 * this function writes the given buffer out to the bulk write endpoint. 2239 *****************************************************************************/ 2240 static int write_cmd_usb(struct edgeport_port *edge_port, 2241 unsigned char *buffer, int length) 2242 { 2243 struct edgeport_serial *edge_serial = 2244 usb_get_serial_data(edge_port->port->serial); 2245 struct device *dev = &edge_port->port->dev; 2246 int status = 0; 2247 struct urb *urb; 2248 2249 usb_serial_debug_data(dev, __func__, length, buffer); 2250 2251 /* Allocate our next urb */ 2252 urb = usb_alloc_urb(0, GFP_ATOMIC); 2253 if (!urb) 2254 return -ENOMEM; 2255 2256 atomic_inc(&CmdUrbs); 2257 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n", 2258 __func__, urb, atomic_read(&CmdUrbs)); 2259 2260 usb_fill_bulk_urb(urb, edge_serial->serial->dev, 2261 usb_sndbulkpipe(edge_serial->serial->dev, 2262 edge_serial->bulk_out_endpoint), 2263 buffer, length, edge_bulk_out_cmd_callback, edge_port); 2264 2265 edge_port->commandPending = true; 2266 status = usb_submit_urb(urb, GFP_ATOMIC); 2267 2268 if (status) { 2269 /* something went wrong */ 2270 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", 2271 __func__, status); 2272 usb_free_urb(urb); 2273 atomic_dec(&CmdUrbs); 2274 return status; 2275 } 2276 2277 #if 0 2278 wait_event(&edge_port->wait_command, !edge_port->commandPending); 2279 2280 if (edge_port->commandPending) { 2281 /* command timed out */ 2282 dev_dbg(dev, "%s - command timed out\n", __func__); 2283 status = -EINVAL; 2284 } 2285 #endif 2286 return status; 2287 } 2288 2289 2290 /***************************************************************************** 2291 * send_cmd_write_baud_rate 2292 * this function sends the proper command to change the baud rate of the 2293 * specified port. 2294 *****************************************************************************/ 2295 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, 2296 int baudRate) 2297 { 2298 struct edgeport_serial *edge_serial = 2299 usb_get_serial_data(edge_port->port->serial); 2300 struct device *dev = &edge_port->port->dev; 2301 unsigned char *cmdBuffer; 2302 unsigned char *currCmd; 2303 int cmdLen = 0; 2304 int divisor; 2305 int status; 2306 u32 number = edge_port->port->port_number; 2307 2308 if (edge_serial->is_epic && 2309 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { 2310 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n", 2311 baudRate); 2312 return 0; 2313 } 2314 2315 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate); 2316 2317 status = calc_baud_rate_divisor(dev, baudRate, &divisor); 2318 if (status) { 2319 dev_err(dev, "%s - bad baud rate\n", __func__); 2320 return status; 2321 } 2322 2323 /* Alloc memory for the string of commands. */ 2324 cmdBuffer = kmalloc(0x100, GFP_ATOMIC); 2325 if (!cmdBuffer) 2326 return -ENOMEM; 2327 2328 currCmd = cmdBuffer; 2329 2330 /* Enable access to divisor latch */ 2331 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); 2332 2333 /* Write the divisor itself */ 2334 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); 2335 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); 2336 2337 /* Restore original value to disable access to divisor latch */ 2338 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, 2339 edge_port->shadowLCR); 2340 2341 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2342 if (status) { 2343 /* something bad happened, let's free up the memory */ 2344 kfree(cmdBuffer); 2345 } 2346 2347 return status; 2348 } 2349 2350 2351 /***************************************************************************** 2352 * calc_baud_rate_divisor 2353 * this function calculates the proper baud rate divisor for the specified 2354 * baud rate. 2355 *****************************************************************************/ 2356 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor) 2357 { 2358 int i; 2359 __u16 custom; 2360 2361 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 2362 if (divisor_table[i].BaudRate == baudrate) { 2363 *divisor = divisor_table[i].Divisor; 2364 return 0; 2365 } 2366 } 2367 2368 /* We have tried all of the standard baud rates 2369 * lets try to calculate the divisor for this baud rate 2370 * Make sure the baud rate is reasonable */ 2371 if (baudrate > 50 && baudrate < 230400) { 2372 /* get divisor */ 2373 custom = (__u16)((230400L + baudrate/2) / baudrate); 2374 2375 *divisor = custom; 2376 2377 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom); 2378 return 0; 2379 } 2380 2381 return -1; 2382 } 2383 2384 2385 /***************************************************************************** 2386 * send_cmd_write_uart_register 2387 * this function builds up a uart register message and sends to the device. 2388 *****************************************************************************/ 2389 static int send_cmd_write_uart_register(struct edgeport_port *edge_port, 2390 __u8 regNum, __u8 regValue) 2391 { 2392 struct edgeport_serial *edge_serial = 2393 usb_get_serial_data(edge_port->port->serial); 2394 struct device *dev = &edge_port->port->dev; 2395 unsigned char *cmdBuffer; 2396 unsigned char *currCmd; 2397 unsigned long cmdLen = 0; 2398 int status; 2399 2400 dev_dbg(dev, "%s - write to %s register 0x%02x\n", 2401 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); 2402 2403 if (edge_serial->is_epic && 2404 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && 2405 regNum == MCR) { 2406 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n"); 2407 return 0; 2408 } 2409 2410 if (edge_serial->is_epic && 2411 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && 2412 regNum == LCR) { 2413 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n"); 2414 return 0; 2415 } 2416 2417 /* Alloc memory for the string of commands. */ 2418 cmdBuffer = kmalloc(0x10, GFP_ATOMIC); 2419 if (cmdBuffer == NULL) 2420 return -ENOMEM; 2421 2422 currCmd = cmdBuffer; 2423 2424 /* Build a cmd in the buffer to write the given register */ 2425 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number, 2426 regNum, regValue); 2427 2428 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); 2429 if (status) { 2430 /* something bad happened, let's free up the memory */ 2431 kfree(cmdBuffer); 2432 } 2433 2434 return status; 2435 } 2436 2437 2438 /***************************************************************************** 2439 * change_port_settings 2440 * This routine is called to set the UART on the device to match the 2441 * specified new settings. 2442 *****************************************************************************/ 2443 2444 static void change_port_settings(struct tty_struct *tty, 2445 struct edgeport_port *edge_port, struct ktermios *old_termios) 2446 { 2447 struct device *dev = &edge_port->port->dev; 2448 struct edgeport_serial *edge_serial = 2449 usb_get_serial_data(edge_port->port->serial); 2450 int baud; 2451 unsigned cflag; 2452 __u8 mask = 0xff; 2453 __u8 lData; 2454 __u8 lParity; 2455 __u8 lStop; 2456 __u8 rxFlow; 2457 __u8 txFlow; 2458 int status; 2459 2460 if (!edge_port->open && 2461 !edge_port->openPending) { 2462 dev_dbg(dev, "%s - port not opened\n", __func__); 2463 return; 2464 } 2465 2466 cflag = tty->termios.c_cflag; 2467 2468 switch (cflag & CSIZE) { 2469 case CS5: 2470 lData = LCR_BITS_5; mask = 0x1f; 2471 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2472 break; 2473 case CS6: 2474 lData = LCR_BITS_6; mask = 0x3f; 2475 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2476 break; 2477 case CS7: 2478 lData = LCR_BITS_7; mask = 0x7f; 2479 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2480 break; 2481 default: 2482 case CS8: 2483 lData = LCR_BITS_8; 2484 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2485 break; 2486 } 2487 2488 lParity = LCR_PAR_NONE; 2489 if (cflag & PARENB) { 2490 if (cflag & CMSPAR) { 2491 if (cflag & PARODD) { 2492 lParity = LCR_PAR_MARK; 2493 dev_dbg(dev, "%s - parity = mark\n", __func__); 2494 } else { 2495 lParity = LCR_PAR_SPACE; 2496 dev_dbg(dev, "%s - parity = space\n", __func__); 2497 } 2498 } else if (cflag & PARODD) { 2499 lParity = LCR_PAR_ODD; 2500 dev_dbg(dev, "%s - parity = odd\n", __func__); 2501 } else { 2502 lParity = LCR_PAR_EVEN; 2503 dev_dbg(dev, "%s - parity = even\n", __func__); 2504 } 2505 } else { 2506 dev_dbg(dev, "%s - parity = none\n", __func__); 2507 } 2508 2509 if (cflag & CSTOPB) { 2510 lStop = LCR_STOP_2; 2511 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2512 } else { 2513 lStop = LCR_STOP_1; 2514 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2515 } 2516 2517 /* figure out the flow control settings */ 2518 rxFlow = txFlow = 0x00; 2519 if (cflag & CRTSCTS) { 2520 rxFlow |= IOSP_RX_FLOW_RTS; 2521 txFlow |= IOSP_TX_FLOW_CTS; 2522 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2523 } else { 2524 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2525 } 2526 2527 /* if we are implementing XON/XOFF, set the start and stop character 2528 in the device */ 2529 if (I_IXOFF(tty) || I_IXON(tty)) { 2530 unsigned char stop_char = STOP_CHAR(tty); 2531 unsigned char start_char = START_CHAR(tty); 2532 2533 if (!edge_serial->is_epic || 2534 edge_serial->epic_descriptor.Supports.IOSPSetXChar) { 2535 send_iosp_ext_cmd(edge_port, 2536 IOSP_CMD_SET_XON_CHAR, start_char); 2537 send_iosp_ext_cmd(edge_port, 2538 IOSP_CMD_SET_XOFF_CHAR, stop_char); 2539 } 2540 2541 /* if we are implementing INBOUND XON/XOFF */ 2542 if (I_IXOFF(tty)) { 2543 rxFlow |= IOSP_RX_FLOW_XON_XOFF; 2544 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2545 __func__, start_char, stop_char); 2546 } else { 2547 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2548 } 2549 2550 /* if we are implementing OUTBOUND XON/XOFF */ 2551 if (I_IXON(tty)) { 2552 txFlow |= IOSP_TX_FLOW_XON_XOFF; 2553 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2554 __func__, start_char, stop_char); 2555 } else { 2556 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2557 } 2558 } 2559 2560 /* Set flow control to the configured value */ 2561 if (!edge_serial->is_epic || 2562 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow) 2563 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); 2564 if (!edge_serial->is_epic || 2565 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow) 2566 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); 2567 2568 2569 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2570 edge_port->shadowLCR |= (lData | lParity | lStop); 2571 2572 edge_port->validDataMask = mask; 2573 2574 /* Send the updated LCR value to the EdgePort */ 2575 status = send_cmd_write_uart_register(edge_port, LCR, 2576 edge_port->shadowLCR); 2577 if (status != 0) 2578 return; 2579 2580 /* set up the MCR register and send it to the EdgePort */ 2581 edge_port->shadowMCR = MCR_MASTER_IE; 2582 if (cflag & CBAUD) 2583 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2584 2585 status = send_cmd_write_uart_register(edge_port, MCR, 2586 edge_port->shadowMCR); 2587 if (status != 0) 2588 return; 2589 2590 /* Determine divisor based on baud rate */ 2591 baud = tty_get_baud_rate(tty); 2592 if (!baud) { 2593 /* pick a default, any default... */ 2594 baud = 9600; 2595 } 2596 2597 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 2598 status = send_cmd_write_baud_rate(edge_port, baud); 2599 if (status == -1) { 2600 /* Speed change was not possible - put back the old speed */ 2601 baud = tty_termios_baud_rate(old_termios); 2602 tty_encode_baud_rate(tty, baud, baud); 2603 } 2604 } 2605 2606 2607 /**************************************************************************** 2608 * unicode_to_ascii 2609 * Turns a string from Unicode into ASCII. 2610 * Doesn't do a good job with any characters that are outside the normal 2611 * ASCII range, but it's only for debugging... 2612 * NOTE: expects the unicode in LE format 2613 ****************************************************************************/ 2614 static void unicode_to_ascii(char *string, int buflen, 2615 __le16 *unicode, int unicode_size) 2616 { 2617 int i; 2618 2619 if (buflen <= 0) /* never happens, but... */ 2620 return; 2621 --buflen; /* space for nul */ 2622 2623 for (i = 0; i < unicode_size; i++) { 2624 if (i >= buflen) 2625 break; 2626 string[i] = (char)(le16_to_cpu(unicode[i])); 2627 } 2628 string[i] = 0x00; 2629 } 2630 2631 2632 /**************************************************************************** 2633 * get_manufacturing_desc 2634 * reads in the manufacturing descriptor and stores it into the serial 2635 * structure. 2636 ****************************************************************************/ 2637 static void get_manufacturing_desc(struct edgeport_serial *edge_serial) 2638 { 2639 struct device *dev = &edge_serial->serial->dev->dev; 2640 int response; 2641 2642 dev_dbg(dev, "getting manufacturer descriptor\n"); 2643 2644 response = rom_read(edge_serial->serial, 2645 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, 2646 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), 2647 EDGE_MANUF_DESC_LEN, 2648 (__u8 *)(&edge_serial->manuf_descriptor)); 2649 2650 if (response < 0) { 2651 dev_err(dev, "error in getting manufacturer descriptor: %d\n", 2652 response); 2653 } else { 2654 char string[30]; 2655 dev_dbg(dev, "**Manufacturer Descriptor\n"); 2656 dev_dbg(dev, " RomSize: %dK\n", 2657 edge_serial->manuf_descriptor.RomSize); 2658 dev_dbg(dev, " RamSize: %dK\n", 2659 edge_serial->manuf_descriptor.RamSize); 2660 dev_dbg(dev, " CpuRev: %d\n", 2661 edge_serial->manuf_descriptor.CpuRev); 2662 dev_dbg(dev, " BoardRev: %d\n", 2663 edge_serial->manuf_descriptor.BoardRev); 2664 dev_dbg(dev, " NumPorts: %d\n", 2665 edge_serial->manuf_descriptor.NumPorts); 2666 dev_dbg(dev, " DescDate: %d/%d/%d\n", 2667 edge_serial->manuf_descriptor.DescDate[0], 2668 edge_serial->manuf_descriptor.DescDate[1], 2669 edge_serial->manuf_descriptor.DescDate[2]+1900); 2670 unicode_to_ascii(string, sizeof(string), 2671 edge_serial->manuf_descriptor.SerialNumber, 2672 edge_serial->manuf_descriptor.SerNumLength/2); 2673 dev_dbg(dev, " SerialNumber: %s\n", string); 2674 unicode_to_ascii(string, sizeof(string), 2675 edge_serial->manuf_descriptor.AssemblyNumber, 2676 edge_serial->manuf_descriptor.AssemblyNumLength/2); 2677 dev_dbg(dev, " AssemblyNumber: %s\n", string); 2678 unicode_to_ascii(string, sizeof(string), 2679 edge_serial->manuf_descriptor.OemAssyNumber, 2680 edge_serial->manuf_descriptor.OemAssyNumLength/2); 2681 dev_dbg(dev, " OemAssyNumber: %s\n", string); 2682 dev_dbg(dev, " UartType: %d\n", 2683 edge_serial->manuf_descriptor.UartType); 2684 dev_dbg(dev, " IonPid: %d\n", 2685 edge_serial->manuf_descriptor.IonPid); 2686 dev_dbg(dev, " IonConfig: %d\n", 2687 edge_serial->manuf_descriptor.IonConfig); 2688 } 2689 } 2690 2691 2692 /**************************************************************************** 2693 * get_boot_desc 2694 * reads in the bootloader descriptor and stores it into the serial 2695 * structure. 2696 ****************************************************************************/ 2697 static void get_boot_desc(struct edgeport_serial *edge_serial) 2698 { 2699 struct device *dev = &edge_serial->serial->dev->dev; 2700 int response; 2701 2702 dev_dbg(dev, "getting boot descriptor\n"); 2703 2704 response = rom_read(edge_serial->serial, 2705 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, 2706 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), 2707 EDGE_BOOT_DESC_LEN, 2708 (__u8 *)(&edge_serial->boot_descriptor)); 2709 2710 if (response < 0) { 2711 dev_err(dev, "error in getting boot descriptor: %d\n", 2712 response); 2713 } else { 2714 dev_dbg(dev, "**Boot Descriptor:\n"); 2715 dev_dbg(dev, " BootCodeLength: %d\n", 2716 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); 2717 dev_dbg(dev, " MajorVersion: %d\n", 2718 edge_serial->boot_descriptor.MajorVersion); 2719 dev_dbg(dev, " MinorVersion: %d\n", 2720 edge_serial->boot_descriptor.MinorVersion); 2721 dev_dbg(dev, " BuildNumber: %d\n", 2722 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); 2723 dev_dbg(dev, " Capabilities: 0x%x\n", 2724 le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); 2725 dev_dbg(dev, " UConfig0: %d\n", 2726 edge_serial->boot_descriptor.UConfig0); 2727 dev_dbg(dev, " UConfig1: %d\n", 2728 edge_serial->boot_descriptor.UConfig1); 2729 } 2730 } 2731 2732 2733 /**************************************************************************** 2734 * load_application_firmware 2735 * This is called to load the application firmware to the device 2736 ****************************************************************************/ 2737 static void load_application_firmware(struct edgeport_serial *edge_serial) 2738 { 2739 struct device *dev = &edge_serial->serial->dev->dev; 2740 const struct ihex_binrec *rec; 2741 const struct firmware *fw; 2742 const char *fw_name; 2743 const char *fw_info; 2744 int response; 2745 __u32 Operaddr; 2746 __u16 build; 2747 2748 switch (edge_serial->product_info.iDownloadFile) { 2749 case EDGE_DOWNLOAD_FILE_I930: 2750 fw_info = "downloading firmware version (930)"; 2751 fw_name = "edgeport/down.fw"; 2752 break; 2753 2754 case EDGE_DOWNLOAD_FILE_80251: 2755 fw_info = "downloading firmware version (80251)"; 2756 fw_name = "edgeport/down2.fw"; 2757 break; 2758 2759 case EDGE_DOWNLOAD_FILE_NONE: 2760 dev_dbg(dev, "No download file specified, skipping download\n"); 2761 return; 2762 2763 default: 2764 return; 2765 } 2766 2767 response = request_ihex_firmware(&fw, fw_name, 2768 &edge_serial->serial->dev->dev); 2769 if (response) { 2770 dev_err(dev, "Failed to load image \"%s\" err %d\n", 2771 fw_name, response); 2772 return; 2773 } 2774 2775 rec = (const struct ihex_binrec *)fw->data; 2776 build = (rec->data[2] << 8) | rec->data[3]; 2777 2778 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build); 2779 2780 edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; 2781 edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; 2782 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); 2783 2784 for (rec = ihex_next_binrec(rec); rec; 2785 rec = ihex_next_binrec(rec)) { 2786 Operaddr = be32_to_cpu(rec->addr); 2787 response = sram_write(edge_serial->serial, 2788 Operaddr >> 16, 2789 Operaddr & 0xFFFF, 2790 be16_to_cpu(rec->len), 2791 &rec->data[0]); 2792 if (response < 0) { 2793 dev_err(&edge_serial->serial->dev->dev, 2794 "sram_write failed (%x, %x, %d)\n", 2795 Operaddr >> 16, Operaddr & 0xFFFF, 2796 be16_to_cpu(rec->len)); 2797 break; 2798 } 2799 } 2800 2801 dev_dbg(dev, "sending exec_dl_code\n"); 2802 response = usb_control_msg (edge_serial->serial->dev, 2803 usb_sndctrlpipe(edge_serial->serial->dev, 0), 2804 USB_REQUEST_ION_EXEC_DL_CODE, 2805 0x40, 0x4000, 0x0001, NULL, 0, 3000); 2806 2807 release_firmware(fw); 2808 } 2809 2810 2811 /**************************************************************************** 2812 * edge_startup 2813 ****************************************************************************/ 2814 static int edge_startup(struct usb_serial *serial) 2815 { 2816 struct edgeport_serial *edge_serial; 2817 struct usb_device *dev; 2818 struct device *ddev = &serial->dev->dev; 2819 int i; 2820 int response; 2821 bool interrupt_in_found; 2822 bool bulk_in_found; 2823 bool bulk_out_found; 2824 static const __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, 2825 EDGE_COMPATIBILITY_MASK1, 2826 EDGE_COMPATIBILITY_MASK2 }; 2827 2828 dev = serial->dev; 2829 2830 /* create our private serial structure */ 2831 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2832 if (!edge_serial) 2833 return -ENOMEM; 2834 2835 spin_lock_init(&edge_serial->es_lock); 2836 edge_serial->serial = serial; 2837 usb_set_serial_data(serial, edge_serial); 2838 2839 /* get the name for the device from the device */ 2840 i = usb_string(dev, dev->descriptor.iManufacturer, 2841 &edge_serial->name[0], MAX_NAME_LEN+1); 2842 if (i < 0) 2843 i = 0; 2844 edge_serial->name[i++] = ' '; 2845 usb_string(dev, dev->descriptor.iProduct, 2846 &edge_serial->name[i], MAX_NAME_LEN+2 - i); 2847 2848 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); 2849 2850 /* Read the epic descriptor */ 2851 if (get_epic_descriptor(edge_serial) < 0) { 2852 /* memcpy descriptor to Supports structures */ 2853 memcpy(&edge_serial->epic_descriptor.Supports, descriptor, 2854 sizeof(struct edge_compatibility_bits)); 2855 2856 /* get the manufacturing descriptor for this device */ 2857 get_manufacturing_desc(edge_serial); 2858 2859 /* get the boot descriptor */ 2860 get_boot_desc(edge_serial); 2861 2862 get_product_info(edge_serial); 2863 } 2864 2865 /* set the number of ports from the manufacturing description */ 2866 /* serial->num_ports = serial->product_info.NumPorts; */ 2867 if ((!edge_serial->is_epic) && 2868 (edge_serial->product_info.NumPorts != serial->num_ports)) { 2869 dev_warn(ddev, 2870 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n", 2871 edge_serial->product_info.NumPorts, 2872 serial->num_ports); 2873 } 2874 2875 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies); 2876 2877 /* If not an EPiC device */ 2878 if (!edge_serial->is_epic) { 2879 /* now load the application firmware into this device */ 2880 load_application_firmware(edge_serial); 2881 2882 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies); 2883 2884 /* Check current Edgeport EEPROM and update if necessary */ 2885 update_edgeport_E2PROM(edge_serial); 2886 2887 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies); 2888 2889 /* set the configuration to use #1 */ 2890 /* dev_dbg(ddev, "set_configuration 1\n"); */ 2891 /* usb_set_configuration (dev, 1); */ 2892 } 2893 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n", 2894 edge_serial->product_info.FirmwareMajorVersion, 2895 edge_serial->product_info.FirmwareMinorVersion, 2896 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); 2897 2898 /* we set up the pointers to the endpoints in the edge_open function, 2899 * as the structures aren't created yet. */ 2900 2901 response = 0; 2902 2903 if (edge_serial->is_epic) { 2904 struct usb_host_interface *alt; 2905 2906 alt = serial->interface->cur_altsetting; 2907 2908 /* EPIC thing, set up our interrupt polling now and our read 2909 * urb, so that the device knows it really is connected. */ 2910 interrupt_in_found = bulk_in_found = bulk_out_found = false; 2911 for (i = 0; i < alt->desc.bNumEndpoints; ++i) { 2912 struct usb_endpoint_descriptor *endpoint; 2913 int buffer_size; 2914 2915 endpoint = &alt->endpoint[i].desc; 2916 buffer_size = usb_endpoint_maxp(endpoint); 2917 if (!interrupt_in_found && 2918 (usb_endpoint_is_int_in(endpoint))) { 2919 /* we found a interrupt in endpoint */ 2920 dev_dbg(ddev, "found interrupt in\n"); 2921 2922 /* not set up yet, so do it now */ 2923 edge_serial->interrupt_read_urb = 2924 usb_alloc_urb(0, GFP_KERNEL); 2925 if (!edge_serial->interrupt_read_urb) { 2926 response = -ENOMEM; 2927 break; 2928 } 2929 2930 edge_serial->interrupt_in_buffer = 2931 kmalloc(buffer_size, GFP_KERNEL); 2932 if (!edge_serial->interrupt_in_buffer) { 2933 response = -ENOMEM; 2934 break; 2935 } 2936 edge_serial->interrupt_in_endpoint = 2937 endpoint->bEndpointAddress; 2938 2939 /* set up our interrupt urb */ 2940 usb_fill_int_urb( 2941 edge_serial->interrupt_read_urb, 2942 dev, 2943 usb_rcvintpipe(dev, 2944 endpoint->bEndpointAddress), 2945 edge_serial->interrupt_in_buffer, 2946 buffer_size, 2947 edge_interrupt_callback, 2948 edge_serial, 2949 endpoint->bInterval); 2950 2951 interrupt_in_found = true; 2952 } 2953 2954 if (!bulk_in_found && 2955 (usb_endpoint_is_bulk_in(endpoint))) { 2956 /* we found a bulk in endpoint */ 2957 dev_dbg(ddev, "found bulk in\n"); 2958 2959 /* not set up yet, so do it now */ 2960 edge_serial->read_urb = 2961 usb_alloc_urb(0, GFP_KERNEL); 2962 if (!edge_serial->read_urb) { 2963 response = -ENOMEM; 2964 break; 2965 } 2966 2967 edge_serial->bulk_in_buffer = 2968 kmalloc(buffer_size, GFP_KERNEL); 2969 if (!edge_serial->bulk_in_buffer) { 2970 response = -ENOMEM; 2971 break; 2972 } 2973 edge_serial->bulk_in_endpoint = 2974 endpoint->bEndpointAddress; 2975 2976 /* set up our bulk in urb */ 2977 usb_fill_bulk_urb(edge_serial->read_urb, dev, 2978 usb_rcvbulkpipe(dev, 2979 endpoint->bEndpointAddress), 2980 edge_serial->bulk_in_buffer, 2981 usb_endpoint_maxp(endpoint), 2982 edge_bulk_in_callback, 2983 edge_serial); 2984 bulk_in_found = true; 2985 } 2986 2987 if (!bulk_out_found && 2988 (usb_endpoint_is_bulk_out(endpoint))) { 2989 /* we found a bulk out endpoint */ 2990 dev_dbg(ddev, "found bulk out\n"); 2991 edge_serial->bulk_out_endpoint = 2992 endpoint->bEndpointAddress; 2993 bulk_out_found = true; 2994 } 2995 } 2996 2997 if (response || !interrupt_in_found || !bulk_in_found || 2998 !bulk_out_found) { 2999 if (!response) { 3000 dev_err(ddev, "expected endpoints not found\n"); 3001 response = -ENODEV; 3002 } 3003 3004 usb_free_urb(edge_serial->interrupt_read_urb); 3005 kfree(edge_serial->interrupt_in_buffer); 3006 3007 usb_free_urb(edge_serial->read_urb); 3008 kfree(edge_serial->bulk_in_buffer); 3009 3010 kfree(edge_serial); 3011 3012 return response; 3013 } 3014 3015 /* start interrupt read for this edgeport this interrupt will 3016 * continue as long as the edgeport is connected */ 3017 response = usb_submit_urb(edge_serial->interrupt_read_urb, 3018 GFP_KERNEL); 3019 if (response) 3020 dev_err(ddev, "%s - Error %d submitting control urb\n", 3021 __func__, response); 3022 } 3023 return response; 3024 } 3025 3026 3027 /**************************************************************************** 3028 * edge_disconnect 3029 * This function is called whenever the device is removed from the usb bus. 3030 ****************************************************************************/ 3031 static void edge_disconnect(struct usb_serial *serial) 3032 { 3033 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3034 3035 if (edge_serial->is_epic) { 3036 usb_kill_urb(edge_serial->interrupt_read_urb); 3037 usb_kill_urb(edge_serial->read_urb); 3038 } 3039 } 3040 3041 3042 /**************************************************************************** 3043 * edge_release 3044 * This function is called when the device structure is deallocated. 3045 ****************************************************************************/ 3046 static void edge_release(struct usb_serial *serial) 3047 { 3048 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 3049 3050 if (edge_serial->is_epic) { 3051 usb_kill_urb(edge_serial->interrupt_read_urb); 3052 usb_free_urb(edge_serial->interrupt_read_urb); 3053 kfree(edge_serial->interrupt_in_buffer); 3054 3055 usb_kill_urb(edge_serial->read_urb); 3056 usb_free_urb(edge_serial->read_urb); 3057 kfree(edge_serial->bulk_in_buffer); 3058 } 3059 3060 kfree(edge_serial); 3061 } 3062 3063 static int edge_port_probe(struct usb_serial_port *port) 3064 { 3065 struct edgeport_port *edge_port; 3066 3067 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 3068 if (!edge_port) 3069 return -ENOMEM; 3070 3071 spin_lock_init(&edge_port->ep_lock); 3072 edge_port->port = port; 3073 3074 usb_set_serial_port_data(port, edge_port); 3075 3076 return 0; 3077 } 3078 3079 static int edge_port_remove(struct usb_serial_port *port) 3080 { 3081 struct edgeport_port *edge_port; 3082 3083 edge_port = usb_get_serial_port_data(port); 3084 kfree(edge_port); 3085 3086 return 0; 3087 } 3088 3089 static struct usb_serial_driver edgeport_2port_device = { 3090 .driver = { 3091 .owner = THIS_MODULE, 3092 .name = "edgeport_2", 3093 }, 3094 .description = "Edgeport 2 port adapter", 3095 .id_table = edgeport_2port_id_table, 3096 .num_ports = 2, 3097 .num_bulk_in = 1, 3098 .num_bulk_out = 1, 3099 .num_interrupt_in = 1, 3100 .open = edge_open, 3101 .close = edge_close, 3102 .throttle = edge_throttle, 3103 .unthrottle = edge_unthrottle, 3104 .attach = edge_startup, 3105 .disconnect = edge_disconnect, 3106 .release = edge_release, 3107 .port_probe = edge_port_probe, 3108 .port_remove = edge_port_remove, 3109 .ioctl = edge_ioctl, 3110 .set_termios = edge_set_termios, 3111 .tiocmget = edge_tiocmget, 3112 .tiocmset = edge_tiocmset, 3113 .get_serial = get_serial_info, 3114 .tiocmiwait = usb_serial_generic_tiocmiwait, 3115 .get_icount = usb_serial_generic_get_icount, 3116 .write = edge_write, 3117 .write_room = edge_write_room, 3118 .chars_in_buffer = edge_chars_in_buffer, 3119 .break_ctl = edge_break, 3120 .read_int_callback = edge_interrupt_callback, 3121 .read_bulk_callback = edge_bulk_in_callback, 3122 .write_bulk_callback = edge_bulk_out_data_callback, 3123 }; 3124 3125 static struct usb_serial_driver edgeport_4port_device = { 3126 .driver = { 3127 .owner = THIS_MODULE, 3128 .name = "edgeport_4", 3129 }, 3130 .description = "Edgeport 4 port adapter", 3131 .id_table = edgeport_4port_id_table, 3132 .num_ports = 4, 3133 .num_bulk_in = 1, 3134 .num_bulk_out = 1, 3135 .num_interrupt_in = 1, 3136 .open = edge_open, 3137 .close = edge_close, 3138 .throttle = edge_throttle, 3139 .unthrottle = edge_unthrottle, 3140 .attach = edge_startup, 3141 .disconnect = edge_disconnect, 3142 .release = edge_release, 3143 .port_probe = edge_port_probe, 3144 .port_remove = edge_port_remove, 3145 .ioctl = edge_ioctl, 3146 .set_termios = edge_set_termios, 3147 .tiocmget = edge_tiocmget, 3148 .tiocmset = edge_tiocmset, 3149 .get_serial = get_serial_info, 3150 .tiocmiwait = usb_serial_generic_tiocmiwait, 3151 .get_icount = usb_serial_generic_get_icount, 3152 .write = edge_write, 3153 .write_room = edge_write_room, 3154 .chars_in_buffer = edge_chars_in_buffer, 3155 .break_ctl = edge_break, 3156 .read_int_callback = edge_interrupt_callback, 3157 .read_bulk_callback = edge_bulk_in_callback, 3158 .write_bulk_callback = edge_bulk_out_data_callback, 3159 }; 3160 3161 static struct usb_serial_driver edgeport_8port_device = { 3162 .driver = { 3163 .owner = THIS_MODULE, 3164 .name = "edgeport_8", 3165 }, 3166 .description = "Edgeport 8 port adapter", 3167 .id_table = edgeport_8port_id_table, 3168 .num_ports = 8, 3169 .num_bulk_in = 1, 3170 .num_bulk_out = 1, 3171 .num_interrupt_in = 1, 3172 .open = edge_open, 3173 .close = edge_close, 3174 .throttle = edge_throttle, 3175 .unthrottle = edge_unthrottle, 3176 .attach = edge_startup, 3177 .disconnect = edge_disconnect, 3178 .release = edge_release, 3179 .port_probe = edge_port_probe, 3180 .port_remove = edge_port_remove, 3181 .ioctl = edge_ioctl, 3182 .set_termios = edge_set_termios, 3183 .tiocmget = edge_tiocmget, 3184 .tiocmset = edge_tiocmset, 3185 .get_serial = get_serial_info, 3186 .tiocmiwait = usb_serial_generic_tiocmiwait, 3187 .get_icount = usb_serial_generic_get_icount, 3188 .write = edge_write, 3189 .write_room = edge_write_room, 3190 .chars_in_buffer = edge_chars_in_buffer, 3191 .break_ctl = edge_break, 3192 .read_int_callback = edge_interrupt_callback, 3193 .read_bulk_callback = edge_bulk_in_callback, 3194 .write_bulk_callback = edge_bulk_out_data_callback, 3195 }; 3196 3197 static struct usb_serial_driver epic_device = { 3198 .driver = { 3199 .owner = THIS_MODULE, 3200 .name = "epic", 3201 }, 3202 .description = "EPiC device", 3203 .id_table = Epic_port_id_table, 3204 .num_ports = 1, 3205 .num_bulk_in = 1, 3206 .num_bulk_out = 1, 3207 .num_interrupt_in = 1, 3208 .open = edge_open, 3209 .close = edge_close, 3210 .throttle = edge_throttle, 3211 .unthrottle = edge_unthrottle, 3212 .attach = edge_startup, 3213 .disconnect = edge_disconnect, 3214 .release = edge_release, 3215 .port_probe = edge_port_probe, 3216 .port_remove = edge_port_remove, 3217 .ioctl = edge_ioctl, 3218 .set_termios = edge_set_termios, 3219 .tiocmget = edge_tiocmget, 3220 .tiocmset = edge_tiocmset, 3221 .get_serial = get_serial_info, 3222 .tiocmiwait = usb_serial_generic_tiocmiwait, 3223 .get_icount = usb_serial_generic_get_icount, 3224 .write = edge_write, 3225 .write_room = edge_write_room, 3226 .chars_in_buffer = edge_chars_in_buffer, 3227 .break_ctl = edge_break, 3228 .read_int_callback = edge_interrupt_callback, 3229 .read_bulk_callback = edge_bulk_in_callback, 3230 .write_bulk_callback = edge_bulk_out_data_callback, 3231 }; 3232 3233 static struct usb_serial_driver * const serial_drivers[] = { 3234 &edgeport_2port_device, &edgeport_4port_device, 3235 &edgeport_8port_device, &epic_device, NULL 3236 }; 3237 3238 module_usb_serial_driver(serial_drivers, id_table_combined); 3239 3240 MODULE_AUTHOR(DRIVER_AUTHOR); 3241 MODULE_DESCRIPTION(DRIVER_DESC); 3242 MODULE_LICENSE("GPL"); 3243 MODULE_FIRMWARE("edgeport/boot.fw"); 3244 MODULE_FIRMWARE("edgeport/boot2.fw"); 3245 MODULE_FIRMWARE("edgeport/down.fw"); 3246 MODULE_FIRMWARE("edgeport/down2.fw"); 3247