drivers/usb/serial/io

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This source file includes following definitions.
update_edgeport_E2PROM
get_string_desc
dump_product_info
get_product_info
get_epic_descriptor
edge_interrupt_callback
edge_bulk_in_callback
edge_bulk_out_data_callback
edge_bulk_out_cmd_callback
edge_open
block_until_chase_response
block_until_tx_empty
edge_close
edge_write
send_more_port_data
edge_write_room
edge_chars_in_buffer
edge_throttle
edge_unthrottle
edge_set_termios
get_lsr_info
edge_tiocmset
edge_tiocmget
get_serial_info
edge_ioctl
edge_break
process_rcvd_data
process_rcvd_status
edge_tty_recv
handle_new_msr
handle_new_lsr
sram_write
rom_write
rom_read
send_iosp_ext_cmd
write_cmd_usb
send_cmd_write_baud_rate
calc_baud_rate_divisor
send_cmd_write_uart_register
change_port_settings
unicode_to_ascii
get_manufacturing_desc
get_boot_desc
load_application_firmware
edge_startup
edge_disconnect
edge_release
edge_port_probe
edge_port_remove
   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 - 1) &&
 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 && 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 usb_serial *serial = edge_serial->serial;
1729         struct device *dev = &serial->dev->dev;
1730         struct usb_serial_port *port;
1731         struct edgeport_port *edge_port;
1732         __u16 lastBufferLength;
1733         __u16 rxLen;
1734 
1735         lastBufferLength = bufferLength + 1;
1736 
1737         while (bufferLength > 0) {
1738                 /* failsafe incase we get a message that we don't understand */
1739                 if (lastBufferLength == bufferLength) {
1740                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1741                         break;
1742                 }
1743                 lastBufferLength = bufferLength;
1744 
1745                 switch (edge_serial->rxState) {
1746                 case EXPECT_HDR1:
1747                         edge_serial->rxHeader1 = *buffer;
1748                         ++buffer;
1749                         --bufferLength;
1750 
1751                         if (bufferLength == 0) {
1752                                 edge_serial->rxState = EXPECT_HDR2;
1753                                 break;
1754                         }
1755                         /* Fall through */
1756                 case EXPECT_HDR2:
1757                         edge_serial->rxHeader2 = *buffer;
1758                         ++buffer;
1759                         --bufferLength;
1760 
1761                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1762                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1763                         /* Process depending on whether this header is
1764                          * data or status */
1765 
1766                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1767                                 /* Decode this status header and go to
1768                                  * EXPECT_HDR1 (if we can process the status
1769                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1770                                  * get the third byte. */
1771                                 edge_serial->rxPort =
1772                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1773                                 edge_serial->rxStatusCode =
1774                                     IOSP_GET_STATUS_CODE(
1775                                                 edge_serial->rxHeader1);
1776 
1777                                 if (!IOSP_STATUS_IS_2BYTE(
1778                                                 edge_serial->rxStatusCode)) {
1779                                         /* This status needs additional bytes.
1780                                          * Save what we have and then wait for
1781                                          * more data.
1782                                          */
1783                                         edge_serial->rxStatusParam
1784                                                 = edge_serial->rxHeader2;
1785                                         edge_serial->rxState = EXPECT_HDR3;
1786                                         break;
1787                                 }
1788                                 /* We have all the header bytes, process the
1789                                    status now */
1790                                 process_rcvd_status(edge_serial,
1791                                                 edge_serial->rxHeader2, 0);
1792                                 edge_serial->rxState = EXPECT_HDR1;
1793                                 break;
1794                         }
1795 
1796                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1797                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1798                                                                               edge_serial->rxHeader2);
1799                         dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1800                                 edge_serial->rxPort,
1801                                 edge_serial->rxBytesRemaining);
1802 
1803                         if (bufferLength == 0) {
1804                                 edge_serial->rxState = EXPECT_DATA;
1805                                 break;
1806                         }
1807                         /* Fall through */
1808                 case EXPECT_DATA: /* Expect data */
1809                         if (bufferLength < edge_serial->rxBytesRemaining) {
1810                                 rxLen = bufferLength;
1811                                 /* Expect data to start next buffer */
1812                                 edge_serial->rxState = EXPECT_DATA;
1813                         } else {
1814                                 /* BufLen >= RxBytesRemaining */
1815                                 rxLen = edge_serial->rxBytesRemaining;
1816                                 /* Start another header next time */
1817                                 edge_serial->rxState = EXPECT_HDR1;
1818                         }
1819 
1820                         bufferLength -= rxLen;
1821                         edge_serial->rxBytesRemaining -= rxLen;
1822 
1823                         /* spit this data back into the tty driver if this
1824                            port is open */
1825                         if (rxLen && edge_serial->rxPort < serial->num_ports) {
1826                                 port = serial->port[edge_serial->rxPort];
1827                                 edge_port = usb_get_serial_port_data(port);
1828                                 if (edge_port && 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                         }
1837                         buffer += rxLen;
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         if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1873                 return;
1874         port = edge_serial->serial->port[edge_serial->rxPort];
1875         edge_port = usb_get_serial_port_data(port);
1876         if (edge_port == NULL) {
1877                 dev_err(&edge_serial->serial->dev->dev,
1878                         "%s - edge_port == NULL for port %d\n",
1879                                         __func__, edge_serial->rxPort);
1880                 return;
1881         }
1882         dev = &port->dev;
1883 
1884         if (code == IOSP_EXT_STATUS) {
1885                 switch (byte2) {
1886                 case IOSP_EXT_STATUS_CHASE_RSP:
1887                         /* we want to do EXT status regardless of port
1888                          * open/closed */
1889                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1890                                 __func__, edge_serial->rxPort, byte3);
1891                         /* Currently, the only EXT_STATUS is Chase, so process
1892                          * here instead of one more call to one more subroutine
1893                          * If/when more EXT_STATUS, there'll be more work to do
1894                          * Also, we currently clear flag and close the port
1895                          * regardless of content of above's Byte3.
1896                          * We could choose to do something else when Byte3 says
1897                          * Timeout on Chase from Edgeport, like wait longer in
1898                          * block_until_chase_response, but for now we don't.
1899                          */
1900                         edge_port->chaseResponsePending = false;
1901                         wake_up(&edge_port->wait_chase);
1902                         return;
1903 
1904                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1905                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1906                                 __func__, edge_serial->rxPort, byte3);
1907                         /* Port->RxCheckRsp = true; */
1908                         return;
1909                 }
1910         }
1911 
1912         if (code == IOSP_STATUS_OPEN_RSP) {
1913                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1914                 edge_port->maxTxCredits = edge_port->txCredits;
1915                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1916                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1917                 handle_new_msr(edge_port, byte2);
1918 
1919                 /* send the current line settings to the port so we are
1920                    in sync with any further termios calls */
1921                 tty = tty_port_tty_get(&edge_port->port->port);
1922                 if (tty) {
1923                         change_port_settings(tty,
1924                                 edge_port, &tty->termios);
1925                         tty_kref_put(tty);
1926                 }
1927 
1928                 /* we have completed the open */
1929                 edge_port->openPending = false;
1930                 edge_port->open = true;
1931                 wake_up(&edge_port->wait_open);
1932                 return;
1933         }
1934 
1935         /* If port is closed, silently discard all rcvd status. We can
1936          * have cases where buffered status is received AFTER the close
1937          * port command is sent to the Edgeport.
1938          */
1939         if (!edge_port->open || edge_port->closePending)
1940                 return;
1941 
1942         switch (code) {
1943         /* Not currently sent by Edgeport */
1944         case IOSP_STATUS_LSR:
1945                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1946                         __func__, edge_serial->rxPort, byte2);
1947                 handle_new_lsr(edge_port, false, byte2, 0);
1948                 break;
1949 
1950         case IOSP_STATUS_LSR_DATA:
1951                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1952                         __func__, edge_serial->rxPort, byte2, byte3);
1953                 /* byte2 is LSR Register */
1954                 /* byte3 is broken data byte */
1955                 handle_new_lsr(edge_port, true, byte2, byte3);
1956                 break;
1957         /*
1958          *      case IOSP_EXT_4_STATUS:
1959          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1960          *                      __func__, edge_serial->rxPort, byte2, byte3);
1961          *              break;
1962          */
1963         case IOSP_STATUS_MSR:
1964                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1965                         __func__, edge_serial->rxPort, byte2);
1966                 /*
1967                  * Process this new modem status and generate appropriate
1968                  * events, etc, based on the new status. This routine
1969                  * also saves the MSR in Port->ShadowMsr.
1970                  */
1971                 handle_new_msr(edge_port, byte2);
1972                 break;
1973 
1974         default:
1975                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1976                 break;
1977         }
1978 }
1979 
1980 
1981 /*****************************************************************************
1982  * edge_tty_recv
1983  *      this function passes data on to the tty flip buffer
1984  *****************************************************************************/
1985 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1986                 int length)
1987 {
1988         int cnt;
1989 
1990         cnt = tty_insert_flip_string(&port->port, data, length);
1991         if (cnt < length) {
1992                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1993                                 __func__, length - cnt);
1994         }
1995         data += cnt;
1996         length -= cnt;
1997 
1998         tty_flip_buffer_push(&port->port);
1999 }
2000 
2001 
2002 /*****************************************************************************
2003  * handle_new_msr
2004  *      this function handles any change to the msr register for a port.
2005  *****************************************************************************/
2006 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2007 {
2008         struct  async_icount *icount;
2009 
2010         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2011                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2012                 icount = &edge_port->port->icount;
2013 
2014                 /* update input line counters */
2015                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2016                         icount->cts++;
2017                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2018                         icount->dsr++;
2019                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2020                         icount->dcd++;
2021                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2022                         icount->rng++;
2023                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
2024         }
2025 
2026         /* Save the new modem status */
2027         edge_port->shadowMSR = newMsr & 0xf0;
2028 }
2029 
2030 
2031 /*****************************************************************************
2032  * handle_new_lsr
2033  *      this function handles any change to the lsr register for a port.
2034  *****************************************************************************/
2035 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2036                                                         __u8 lsr, __u8 data)
2037 {
2038         __u8 newLsr = (__u8) (lsr & (__u8)
2039                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2040         struct async_icount *icount;
2041 
2042         edge_port->shadowLSR = lsr;
2043 
2044         if (newLsr & LSR_BREAK) {
2045                 /*
2046                  * Parity and Framing errors only count if they
2047                  * occur exclusive of a break being
2048                  * received.
2049                  */
2050                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2051         }
2052 
2053         /* Place LSR data byte into Rx buffer */
2054         if (lsrData)
2055                 edge_tty_recv(edge_port->port, &data, 1);
2056 
2057         /* update input line counters */
2058         icount = &edge_port->port->icount;
2059         if (newLsr & LSR_BREAK)
2060                 icount->brk++;
2061         if (newLsr & LSR_OVER_ERR)
2062                 icount->overrun++;
2063         if (newLsr & LSR_PAR_ERR)
2064                 icount->parity++;
2065         if (newLsr & LSR_FRM_ERR)
2066                 icount->frame++;
2067 }
2068 
2069 
2070 /****************************************************************************
2071  * sram_write
2072  *      writes a number of bytes to the Edgeport device's sram starting at the
2073  *      given address.
2074  *      If successful returns the number of bytes written, otherwise it returns
2075  *      a negative error number of the problem.
2076  ****************************************************************************/
2077 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2078                                         __u16 length, const __u8 *data)
2079 {
2080         int result;
2081         __u16 current_length;
2082         unsigned char *transfer_buffer;
2083 
2084         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2085 
2086         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2087         if (!transfer_buffer)
2088                 return -ENOMEM;
2089 
2090         /* need to split these writes up into 64 byte chunks */
2091         result = 0;
2092         while (length > 0) {
2093                 if (length > 64)
2094                         current_length = 64;
2095                 else
2096                         current_length = length;
2097 
2098 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2099                 memcpy(transfer_buffer, data, current_length);
2100                 result = usb_control_msg(serial->dev,
2101                                         usb_sndctrlpipe(serial->dev, 0),
2102                                         USB_REQUEST_ION_WRITE_RAM,
2103                                         0x40, addr, extAddr, transfer_buffer,
2104                                         current_length, 300);
2105                 if (result < 0)
2106                         break;
2107                 length -= current_length;
2108                 addr += current_length;
2109                 data += current_length;
2110         }
2111 
2112         kfree(transfer_buffer);
2113         return result;
2114 }
2115 
2116 
2117 /****************************************************************************
2118  * rom_write
2119  *      writes a number of bytes to the Edgeport device's ROM starting at the
2120  *      given address.
2121  *      If successful returns the number of bytes written, otherwise it returns
2122  *      a negative error number of the problem.
2123  ****************************************************************************/
2124 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2125                                         __u16 length, const __u8 *data)
2126 {
2127         int result;
2128         __u16 current_length;
2129         unsigned char *transfer_buffer;
2130 
2131         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2132         if (!transfer_buffer)
2133                 return -ENOMEM;
2134 
2135         /* need to split these writes up into 64 byte chunks */
2136         result = 0;
2137         while (length > 0) {
2138                 if (length > 64)
2139                         current_length = 64;
2140                 else
2141                         current_length = length;
2142                 memcpy(transfer_buffer, data, current_length);
2143                 result = usb_control_msg(serial->dev,
2144                                         usb_sndctrlpipe(serial->dev, 0),
2145                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2146                                         addr, extAddr,
2147                                         transfer_buffer, current_length, 300);
2148                 if (result < 0)
2149                         break;
2150                 length -= current_length;
2151                 addr += current_length;
2152                 data += current_length;
2153         }
2154 
2155         kfree(transfer_buffer);
2156         return result;
2157 }
2158 
2159 
2160 /****************************************************************************
2161  * rom_read
2162  *      reads a number of bytes from the Edgeport device starting at the given
2163  *      address.
2164  *      Returns zero on success or a negative error number.
2165  ****************************************************************************/
2166 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2167                                         __u16 addr, __u16 length, __u8 *data)
2168 {
2169         int result;
2170         __u16 current_length;
2171         unsigned char *transfer_buffer;
2172 
2173         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2174         if (!transfer_buffer)
2175                 return -ENOMEM;
2176 
2177         /* need to split these reads up into 64 byte chunks */
2178         result = 0;
2179         while (length > 0) {
2180                 if (length > 64)
2181                         current_length = 64;
2182                 else
2183                         current_length = length;
2184                 result = usb_control_msg(serial->dev,
2185                                         usb_rcvctrlpipe(serial->dev, 0),
2186                                         USB_REQUEST_ION_READ_ROM,
2187                                         0xC0, addr, extAddr, transfer_buffer,
2188                                         current_length, 300);
2189                 if (result < current_length) {
2190                         if (result >= 0)
2191                                 result = -EIO;
2192                         break;
2193                 }
2194                 memcpy(data, transfer_buffer, current_length);
2195                 length -= current_length;
2196                 addr += current_length;
2197                 data += current_length;
2198 
2199                 result = 0;
2200         }
2201 
2202         kfree(transfer_buffer);
2203         return result;
2204 }
2205 
2206 
2207 /****************************************************************************
2208  * send_iosp_ext_cmd
2209  *      Is used to send a IOSP message to the Edgeport device
2210  ****************************************************************************/
2211 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2212                                                 __u8 command, __u8 param)
2213 {
2214         unsigned char   *buffer;
2215         unsigned char   *currentCommand;
2216         int             length = 0;
2217         int             status = 0;
2218 
2219         buffer = kmalloc(10, GFP_ATOMIC);
2220         if (!buffer)
2221                 return -ENOMEM;
2222 
2223         currentCommand = buffer;
2224 
2225         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2226                          command, param);
2227 
2228         status = write_cmd_usb(edge_port, buffer, length);
2229         if (status) {
2230                 /* something bad happened, let's free up the memory */
2231                 kfree(buffer);
2232         }
2233 
2234         return status;
2235 }
2236 
2237 
2238 /*****************************************************************************
2239  * write_cmd_usb
2240  *      this function writes the given buffer out to the bulk write endpoint.
2241  *****************************************************************************/
2242 static int write_cmd_usb(struct edgeport_port *edge_port,
2243                                         unsigned char *buffer, int length)
2244 {
2245         struct edgeport_serial *edge_serial =
2246                                 usb_get_serial_data(edge_port->port->serial);
2247         struct device *dev = &edge_port->port->dev;
2248         int status = 0;
2249         struct urb *urb;
2250 
2251         usb_serial_debug_data(dev, __func__, length, buffer);
2252 
2253         /* Allocate our next urb */
2254         urb = usb_alloc_urb(0, GFP_ATOMIC);
2255         if (!urb)
2256                 return -ENOMEM;
2257 
2258         atomic_inc(&CmdUrbs);
2259         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2260                 __func__, urb, atomic_read(&CmdUrbs));
2261 
2262         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2263                         usb_sndbulkpipe(edge_serial->serial->dev,
2264                                         edge_serial->bulk_out_endpoint),
2265                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2266 
2267         edge_port->commandPending = true;
2268         status = usb_submit_urb(urb, GFP_ATOMIC);
2269 
2270         if (status) {
2271                 /* something went wrong */
2272                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2273                         __func__, status);
2274                 usb_free_urb(urb);
2275                 atomic_dec(&CmdUrbs);
2276                 return status;
2277         }
2278 
2279 #if 0
2280         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2281 
2282         if (edge_port->commandPending) {
2283                 /* command timed out */
2284                 dev_dbg(dev, "%s - command timed out\n", __func__);
2285                 status = -EINVAL;
2286         }
2287 #endif
2288         return status;
2289 }
2290 
2291 
2292 /*****************************************************************************
2293  * send_cmd_write_baud_rate
2294  *      this function sends the proper command to change the baud rate of the
2295  *      specified port.
2296  *****************************************************************************/
2297 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2298                                                                 int baudRate)
2299 {
2300         struct edgeport_serial *edge_serial =
2301                                 usb_get_serial_data(edge_port->port->serial);
2302         struct device *dev = &edge_port->port->dev;
2303         unsigned char *cmdBuffer;
2304         unsigned char *currCmd;
2305         int cmdLen = 0;
2306         int divisor;
2307         int status;
2308         u32 number = edge_port->port->port_number;
2309 
2310         if (edge_serial->is_epic &&
2311             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2312                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2313                         baudRate);
2314                 return 0;
2315         }
2316 
2317         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2318 
2319         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2320         if (status) {
2321                 dev_err(dev, "%s - bad baud rate\n", __func__);
2322                 return status;
2323         }
2324 
2325         /* Alloc memory for the string of commands. */
2326         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2327         if (!cmdBuffer)
2328                 return -ENOMEM;
2329 
2330         currCmd = cmdBuffer;
2331 
2332         /* Enable access to divisor latch */
2333         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2334 
2335         /* Write the divisor itself */
2336         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2337         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2338 
2339         /* Restore original value to disable access to divisor latch */
2340         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2341                                                 edge_port->shadowLCR);
2342 
2343         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2344         if (status) {
2345                 /* something bad happened, let's free up the memory */
2346                 kfree(cmdBuffer);
2347         }
2348 
2349         return status;
2350 }
2351 
2352 
2353 /*****************************************************************************
2354  * calc_baud_rate_divisor
2355  *      this function calculates the proper baud rate divisor for the specified
2356  *      baud rate.
2357  *****************************************************************************/
2358 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2359 {
2360         int i;
2361         __u16 custom;
2362 
2363         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2364                 if (divisor_table[i].BaudRate == baudrate) {
2365                         *divisor = divisor_table[i].Divisor;
2366                         return 0;
2367                 }
2368         }
2369 
2370         /* We have tried all of the standard baud rates
2371          * lets try to calculate the divisor for this baud rate
2372          * Make sure the baud rate is reasonable */
2373         if (baudrate > 50 && baudrate < 230400) {
2374                 /* get divisor */
2375                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2376 
2377                 *divisor = custom;
2378 
2379                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2380                 return 0;
2381         }
2382 
2383         return -1;
2384 }
2385 
2386 
2387 /*****************************************************************************
2388  * send_cmd_write_uart_register
2389  *  this function builds up a uart register message and sends to the device.
2390  *****************************************************************************/
2391 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2392                                                 __u8 regNum, __u8 regValue)
2393 {
2394         struct edgeport_serial *edge_serial =
2395                                 usb_get_serial_data(edge_port->port->serial);
2396         struct device *dev = &edge_port->port->dev;
2397         unsigned char *cmdBuffer;
2398         unsigned char *currCmd;
2399         unsigned long cmdLen = 0;
2400         int status;
2401 
2402         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2403                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2404 
2405         if (edge_serial->is_epic &&
2406             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2407             regNum == MCR) {
2408                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2409                 return 0;
2410         }
2411 
2412         if (edge_serial->is_epic &&
2413             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2414             regNum == LCR) {
2415                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2416                 return 0;
2417         }
2418 
2419         /* Alloc memory for the string of commands. */
2420         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2421         if (cmdBuffer == NULL)
2422                 return -ENOMEM;
2423 
2424         currCmd = cmdBuffer;
2425 
2426         /* Build a cmd in the buffer to write the given register */
2427         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2428                            regNum, regValue);
2429 
2430         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2431         if (status) {
2432                 /* something bad happened, let's free up the memory */
2433                 kfree(cmdBuffer);
2434         }
2435 
2436         return status;
2437 }
2438 
2439 
2440 /*****************************************************************************
2441  * change_port_settings
2442  *      This routine is called to set the UART on the device to match the
2443  *      specified new settings.
2444  *****************************************************************************/
2445 
2446 static void change_port_settings(struct tty_struct *tty,
2447         struct edgeport_port *edge_port, struct ktermios *old_termios)
2448 {
2449         struct device *dev = &edge_port->port->dev;
2450         struct edgeport_serial *edge_serial =
2451                         usb_get_serial_data(edge_port->port->serial);
2452         int baud;
2453         unsigned cflag;
2454         __u8 mask = 0xff;
2455         __u8 lData;
2456         __u8 lParity;
2457         __u8 lStop;
2458         __u8 rxFlow;
2459         __u8 txFlow;
2460         int status;
2461 
2462         if (!edge_port->open &&
2463             !edge_port->openPending) {
2464                 dev_dbg(dev, "%s - port not opened\n", __func__);
2465                 return;
2466         }
2467 
2468         cflag = tty->termios.c_cflag;
2469 
2470         switch (cflag & CSIZE) {
2471         case CS5:
2472                 lData = LCR_BITS_5; mask = 0x1f;
2473                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2474                 break;
2475         case CS6:
2476                 lData = LCR_BITS_6; mask = 0x3f;
2477                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2478                 break;
2479         case CS7:
2480                 lData = LCR_BITS_7; mask = 0x7f;
2481                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2482                 break;
2483         default:
2484         case CS8:
2485                 lData = LCR_BITS_8;
2486                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2487                 break;
2488         }
2489 
2490         lParity = LCR_PAR_NONE;
2491         if (cflag & PARENB) {
2492                 if (cflag & CMSPAR) {
2493                         if (cflag & PARODD) {
2494                                 lParity = LCR_PAR_MARK;
2495                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2496                         } else {
2497                                 lParity = LCR_PAR_SPACE;
2498                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2499                         }
2500                 } else if (cflag & PARODD) {
2501                         lParity = LCR_PAR_ODD;
2502                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2503                 } else {
2504                         lParity = LCR_PAR_EVEN;
2505                         dev_dbg(dev, "%s - parity = even\n", __func__);
2506                 }
2507         } else {
2508                 dev_dbg(dev, "%s - parity = none\n", __func__);
2509         }
2510 
2511         if (cflag & CSTOPB) {
2512                 lStop = LCR_STOP_2;
2513                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2514         } else {
2515                 lStop = LCR_STOP_1;
2516                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2517         }
2518 
2519         /* figure out the flow control settings */
2520         rxFlow = txFlow = 0x00;
2521         if (cflag & CRTSCTS) {
2522                 rxFlow |= IOSP_RX_FLOW_RTS;
2523                 txFlow |= IOSP_TX_FLOW_CTS;
2524                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2525         } else {
2526                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2527         }
2528 
2529         /* if we are implementing XON/XOFF, set the start and stop character
2530            in the device */
2531         if (I_IXOFF(tty) || I_IXON(tty)) {
2532                 unsigned char stop_char  = STOP_CHAR(tty);
2533                 unsigned char start_char = START_CHAR(tty);
2534 
2535                 if (!edge_serial->is_epic ||
2536                     edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2537                         send_iosp_ext_cmd(edge_port,
2538                                         IOSP_CMD_SET_XON_CHAR, start_char);
2539                         send_iosp_ext_cmd(edge_port,
2540                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2541                 }
2542 
2543                 /* if we are implementing INBOUND XON/XOFF */
2544                 if (I_IXOFF(tty)) {
2545                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2546                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2547                                 __func__, start_char, stop_char);
2548                 } else {
2549                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2550                 }
2551 
2552                 /* if we are implementing OUTBOUND XON/XOFF */
2553                 if (I_IXON(tty)) {
2554                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2555                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2556                                 __func__, start_char, stop_char);
2557                 } else {
2558                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2559                 }
2560         }
2561 
2562         /* Set flow control to the configured value */
2563         if (!edge_serial->is_epic ||
2564             edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2565                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2566         if (!edge_serial->is_epic ||
2567             edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2568                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2569 
2570 
2571         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2572         edge_port->shadowLCR |= (lData | lParity | lStop);
2573 
2574         edge_port->validDataMask = mask;
2575 
2576         /* Send the updated LCR value to the EdgePort */
2577         status = send_cmd_write_uart_register(edge_port, LCR,
2578                                                         edge_port->shadowLCR);
2579         if (status != 0)
2580                 return;
2581 
2582         /* set up the MCR register and send it to the EdgePort */
2583         edge_port->shadowMCR = MCR_MASTER_IE;
2584         if (cflag & CBAUD)
2585                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2586 
2587         status = send_cmd_write_uart_register(edge_port, MCR,
2588                                                 edge_port->shadowMCR);
2589         if (status != 0)
2590                 return;
2591 
2592         /* Determine divisor based on baud rate */
2593         baud = tty_get_baud_rate(tty);
2594         if (!baud) {
2595                 /* pick a default, any default... */
2596                 baud = 9600;
2597         }
2598 
2599         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2600         status = send_cmd_write_baud_rate(edge_port, baud);
2601         if (status == -1) {
2602                 /* Speed change was not possible - put back the old speed */
2603                 baud = tty_termios_baud_rate(old_termios);
2604                 tty_encode_baud_rate(tty, baud, baud);
2605         }
2606 }
2607 
2608 
2609 /****************************************************************************
2610  * unicode_to_ascii
2611  *      Turns a string from Unicode into ASCII.
2612  *      Doesn't do a good job with any characters that are outside the normal
2613  *      ASCII range, but it's only for debugging...
2614  *      NOTE: expects the unicode in LE format
2615  ****************************************************************************/
2616 static void unicode_to_ascii(char *string, int buflen,
2617                                         __le16 *unicode, int unicode_size)
2618 {
2619         int i;
2620 
2621         if (buflen <= 0)        /* never happens, but... */
2622                 return;
2623         --buflen;               /* space for nul */
2624 
2625         for (i = 0; i < unicode_size; i++) {
2626                 if (i >= buflen)
2627                         break;
2628                 string[i] = (char)(le16_to_cpu(unicode[i]));
2629         }
2630         string[i] = 0x00;
2631 }
2632 
2633 
2634 /****************************************************************************
2635  * get_manufacturing_desc
2636  *      reads in the manufacturing descriptor and stores it into the serial
2637  *      structure.
2638  ****************************************************************************/
2639 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2640 {
2641         struct device *dev = &edge_serial->serial->dev->dev;
2642         int response;
2643 
2644         dev_dbg(dev, "getting manufacturer descriptor\n");
2645 
2646         response = rom_read(edge_serial->serial,
2647                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2648                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2649                                 EDGE_MANUF_DESC_LEN,
2650                                 (__u8 *)(&edge_serial->manuf_descriptor));
2651 
2652         if (response < 0) {
2653                 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2654                                 response);
2655         } else {
2656                 char string[30];
2657                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2658                 dev_dbg(dev, "  RomSize:        %dK\n",
2659                         edge_serial->manuf_descriptor.RomSize);
2660                 dev_dbg(dev, "  RamSize:        %dK\n",
2661                         edge_serial->manuf_descriptor.RamSize);
2662                 dev_dbg(dev, "  CpuRev:         %d\n",
2663                         edge_serial->manuf_descriptor.CpuRev);
2664                 dev_dbg(dev, "  BoardRev:       %d\n",
2665                         edge_serial->manuf_descriptor.BoardRev);
2666                 dev_dbg(dev, "  NumPorts:       %d\n",
2667                         edge_serial->manuf_descriptor.NumPorts);
2668                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2669                         edge_serial->manuf_descriptor.DescDate[0],
2670                         edge_serial->manuf_descriptor.DescDate[1],
2671                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2672                 unicode_to_ascii(string, sizeof(string),
2673                         edge_serial->manuf_descriptor.SerialNumber,
2674                         edge_serial->manuf_descriptor.SerNumLength/2);
2675                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2676                 unicode_to_ascii(string, sizeof(string),
2677                         edge_serial->manuf_descriptor.AssemblyNumber,
2678                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2679                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2680                 unicode_to_ascii(string, sizeof(string),
2681                     edge_serial->manuf_descriptor.OemAssyNumber,
2682                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2683                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2684                 dev_dbg(dev, "  UartType:       %d\n",
2685                         edge_serial->manuf_descriptor.UartType);
2686                 dev_dbg(dev, "  IonPid:         %d\n",
2687                         edge_serial->manuf_descriptor.IonPid);
2688                 dev_dbg(dev, "  IonConfig:      %d\n",
2689                         edge_serial->manuf_descriptor.IonConfig);
2690         }
2691 }
2692 
2693 
2694 /****************************************************************************
2695  * get_boot_desc
2696  *      reads in the bootloader descriptor and stores it into the serial
2697  *      structure.
2698  ****************************************************************************/
2699 static void get_boot_desc(struct edgeport_serial *edge_serial)
2700 {
2701         struct device *dev = &edge_serial->serial->dev->dev;
2702         int response;
2703 
2704         dev_dbg(dev, "getting boot descriptor\n");
2705 
2706         response = rom_read(edge_serial->serial,
2707                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2708                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2709                                 EDGE_BOOT_DESC_LEN,
2710                                 (__u8 *)(&edge_serial->boot_descriptor));
2711 
2712         if (response < 0) {
2713                 dev_err(dev, "error in getting boot descriptor: %d\n",
2714                                 response);
2715         } else {
2716                 dev_dbg(dev, "**Boot Descriptor:\n");
2717                 dev_dbg(dev, "  BootCodeLength: %d\n",
2718                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2719                 dev_dbg(dev, "  MajorVersion:   %d\n",
2720                         edge_serial->boot_descriptor.MajorVersion);
2721                 dev_dbg(dev, "  MinorVersion:   %d\n",
2722                         edge_serial->boot_descriptor.MinorVersion);
2723                 dev_dbg(dev, "  BuildNumber:    %d\n",
2724                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2725                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2726                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2727                 dev_dbg(dev, "  UConfig0:       %d\n",
2728                         edge_serial->boot_descriptor.UConfig0);
2729                 dev_dbg(dev, "  UConfig1:       %d\n",
2730                         edge_serial->boot_descriptor.UConfig1);
2731         }
2732 }
2733 
2734 
2735 /****************************************************************************
2736  * load_application_firmware
2737  *      This is called to load the application firmware to the device
2738  ****************************************************************************/
2739 static void load_application_firmware(struct edgeport_serial *edge_serial)
2740 {
2741         struct device *dev = &edge_serial->serial->dev->dev;
2742         const struct ihex_binrec *rec;
2743         const struct firmware *fw;
2744         const char *fw_name;
2745         const char *fw_info;
2746         int response;
2747         __u32 Operaddr;
2748         __u16 build;
2749 
2750         switch (edge_serial->product_info.iDownloadFile) {
2751                 case EDGE_DOWNLOAD_FILE_I930:
2752                         fw_info = "downloading firmware version (930)";
2753                         fw_name = "edgeport/down.fw";
2754                         break;
2755 
2756                 case EDGE_DOWNLOAD_FILE_80251:
2757                         fw_info = "downloading firmware version (80251)";
2758                         fw_name = "edgeport/down2.fw";
2759                         break;
2760 
2761                 case EDGE_DOWNLOAD_FILE_NONE:
2762                         dev_dbg(dev, "No download file specified, skipping download\n");
2763                         return;
2764 
2765                 default:
2766                         return;
2767         }
2768 
2769         response = request_ihex_firmware(&fw, fw_name,
2770                                     &edge_serial->serial->dev->dev);
2771         if (response) {
2772                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2773                        fw_name, response);
2774                 return;
2775         }
2776 
2777         rec = (const struct ihex_binrec *)fw->data;
2778         build = (rec->data[2] << 8) | rec->data[3];
2779 
2780         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2781 
2782         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2783         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2784         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2785 
2786         for (rec = ihex_next_binrec(rec); rec;
2787              rec = ihex_next_binrec(rec)) {
2788                 Operaddr = be32_to_cpu(rec->addr);
2789                 response = sram_write(edge_serial->serial,
2790                                      Operaddr >> 16,
2791                                      Operaddr & 0xFFFF,
2792                                      be16_to_cpu(rec->len),
2793                                      &rec->data[0]);
2794                 if (response < 0) {
2795                         dev_err(&edge_serial->serial->dev->dev,
2796                                 "sram_write failed (%x, %x, %d)\n",
2797                                 Operaddr >> 16, Operaddr & 0xFFFF,
2798                                 be16_to_cpu(rec->len));
2799                         break;
2800                 }
2801         }
2802 
2803         dev_dbg(dev, "sending exec_dl_code\n");
2804         response = usb_control_msg (edge_serial->serial->dev,
2805                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2806                                     USB_REQUEST_ION_EXEC_DL_CODE,
2807                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2808 
2809         release_firmware(fw);
2810 }
2811 
2812 
2813 /****************************************************************************
2814  * edge_startup
2815  ****************************************************************************/
2816 static int edge_startup(struct usb_serial *serial)
2817 {
2818         struct edgeport_serial *edge_serial;
2819         struct usb_device *dev;
2820         struct device *ddev = &serial->dev->dev;
2821         int i;
2822         int response;
2823         bool interrupt_in_found;
2824         bool bulk_in_found;
2825         bool bulk_out_found;
2826         static const __u32 descriptor[3] = {    EDGE_COMPATIBILITY_MASK0,
2827                                                 EDGE_COMPATIBILITY_MASK1,
2828                                                 EDGE_COMPATIBILITY_MASK2 };
2829 
2830         dev = serial->dev;
2831 
2832         /* create our private serial structure */
2833         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2834         if (!edge_serial)
2835                 return -ENOMEM;
2836 
2837         spin_lock_init(&edge_serial->es_lock);
2838         edge_serial->serial = serial;
2839         usb_set_serial_data(serial, edge_serial);
2840 
2841         /* get the name for the device from the device */
2842         i = usb_string(dev, dev->descriptor.iManufacturer,
2843             &edge_serial->name[0], MAX_NAME_LEN+1);
2844         if (i < 0)
2845                 i = 0;
2846         edge_serial->name[i++] = ' ';
2847         usb_string(dev, dev->descriptor.iProduct,
2848             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2849 
2850         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2851 
2852         /* Read the epic descriptor */
2853         if (get_epic_descriptor(edge_serial) < 0) {
2854                 /* memcpy descriptor to Supports structures */
2855                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2856                        sizeof(struct edge_compatibility_bits));
2857 
2858                 /* get the manufacturing descriptor for this device */
2859                 get_manufacturing_desc(edge_serial);
2860 
2861                 /* get the boot descriptor */
2862                 get_boot_desc(edge_serial);
2863 
2864                 get_product_info(edge_serial);
2865         }
2866 
2867         /* set the number of ports from the manufacturing description */
2868         /* serial->num_ports = serial->product_info.NumPorts; */
2869         if ((!edge_serial->is_epic) &&
2870             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2871                 dev_warn(ddev,
2872                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2873                          edge_serial->product_info.NumPorts,
2874                          serial->num_ports);
2875         }
2876 
2877         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2878 
2879         /* If not an EPiC device */
2880         if (!edge_serial->is_epic) {
2881                 /* now load the application firmware into this device */
2882                 load_application_firmware(edge_serial);
2883 
2884                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2885 
2886                 /* Check current Edgeport EEPROM and update if necessary */
2887                 update_edgeport_E2PROM(edge_serial);
2888 
2889                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2890 
2891                 /* set the configuration to use #1 */
2892 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2893 /*              usb_set_configuration (dev, 1); */
2894         }
2895         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2896             edge_serial->product_info.FirmwareMajorVersion,
2897             edge_serial->product_info.FirmwareMinorVersion,
2898             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2899 
2900         /* we set up the pointers to the endpoints in the edge_open function,
2901          * as the structures aren't created yet. */
2902 
2903         response = 0;
2904 
2905         if (edge_serial->is_epic) {
2906                 struct usb_host_interface *alt;
2907 
2908                 alt = serial->interface->cur_altsetting;
2909 
2910                 /* EPIC thing, set up our interrupt polling now and our read
2911                  * urb, so that the device knows it really is connected. */
2912                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2913                 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2914                         struct usb_endpoint_descriptor *endpoint;
2915                         int buffer_size;
2916 
2917                         endpoint = &alt->endpoint[i].desc;
2918                         buffer_size = usb_endpoint_maxp(endpoint);
2919                         if (!interrupt_in_found &&
2920                             (usb_endpoint_is_int_in(endpoint))) {
2921                                 /* we found a interrupt in endpoint */
2922                                 dev_dbg(ddev, "found interrupt in\n");
2923 
2924                                 /* not set up yet, so do it now */
2925                                 edge_serial->interrupt_read_urb =
2926                                                 usb_alloc_urb(0, GFP_KERNEL);
2927                                 if (!edge_serial->interrupt_read_urb) {
2928                                         response = -ENOMEM;
2929                                         break;
2930                                 }
2931 
2932                                 edge_serial->interrupt_in_buffer =
2933                                         kmalloc(buffer_size, GFP_KERNEL);
2934                                 if (!edge_serial->interrupt_in_buffer) {
2935                                         response = -ENOMEM;
2936                                         break;
2937                                 }
2938                                 edge_serial->interrupt_in_endpoint =
2939                                                 endpoint->bEndpointAddress;
2940 
2941                                 /* set up our interrupt urb */
2942                                 usb_fill_int_urb(
2943                                         edge_serial->interrupt_read_urb,
2944                                         dev,
2945                                         usb_rcvintpipe(dev,
2946                                                 endpoint->bEndpointAddress),
2947                                         edge_serial->interrupt_in_buffer,
2948                                         buffer_size,
2949                                         edge_interrupt_callback,
2950                                         edge_serial,
2951                                         endpoint->bInterval);
2952 
2953                                 interrupt_in_found = true;
2954                         }
2955 
2956                         if (!bulk_in_found &&
2957                                 (usb_endpoint_is_bulk_in(endpoint))) {
2958                                 /* we found a bulk in endpoint */
2959                                 dev_dbg(ddev, "found bulk in\n");
2960 
2961                                 /* not set up yet, so do it now */
2962                                 edge_serial->read_urb =
2963                                                 usb_alloc_urb(0, GFP_KERNEL);
2964                                 if (!edge_serial->read_urb) {
2965                                         response = -ENOMEM;
2966                                         break;
2967                                 }
2968 
2969                                 edge_serial->bulk_in_buffer =
2970                                         kmalloc(buffer_size, GFP_KERNEL);
2971                                 if (!edge_serial->bulk_in_buffer) {
2972                                         response = -ENOMEM;
2973                                         break;
2974                                 }
2975                                 edge_serial->bulk_in_endpoint =
2976                                                 endpoint->bEndpointAddress;
2977 
2978                                 /* set up our bulk in urb */
2979                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2980                                         usb_rcvbulkpipe(dev,
2981                                                 endpoint->bEndpointAddress),
2982                                         edge_serial->bulk_in_buffer,
2983                                         usb_endpoint_maxp(endpoint),
2984                                         edge_bulk_in_callback,
2985                                         edge_serial);
2986                                 bulk_in_found = true;
2987                         }
2988 
2989                         if (!bulk_out_found &&
2990                             (usb_endpoint_is_bulk_out(endpoint))) {
2991                                 /* we found a bulk out endpoint */
2992                                 dev_dbg(ddev, "found bulk out\n");
2993                                 edge_serial->bulk_out_endpoint =
2994                                                 endpoint->bEndpointAddress;
2995                                 bulk_out_found = true;
2996                         }
2997                 }
2998 
2999                 if (response || !interrupt_in_found || !bulk_in_found ||
3000                                                         !bulk_out_found) {
3001                         if (!response) {
3002                                 dev_err(ddev, "expected endpoints not found\n");
3003                                 response = -ENODEV;
3004                         }
3005 
3006                         usb_free_urb(edge_serial->interrupt_read_urb);
3007                         kfree(edge_serial->interrupt_in_buffer);
3008 
3009                         usb_free_urb(edge_serial->read_urb);
3010                         kfree(edge_serial->bulk_in_buffer);
3011 
3012                         kfree(edge_serial);
3013 
3014                         return response;
3015                 }
3016 
3017                 /* start interrupt read for this edgeport this interrupt will
3018                  * continue as long as the edgeport is connected */
3019                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3020                                                                 GFP_KERNEL);
3021                 if (response)
3022                         dev_err(ddev, "%s - Error %d submitting control urb\n",
3023                                 __func__, response);
3024         }
3025         return response;
3026 }
3027 
3028 
3029 /****************************************************************************
3030  * edge_disconnect
3031  *      This function is called whenever the device is removed from the usb bus.
3032  ****************************************************************************/
3033 static void edge_disconnect(struct usb_serial *serial)
3034 {
3035         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3036 
3037         if (edge_serial->is_epic) {
3038                 usb_kill_urb(edge_serial->interrupt_read_urb);
3039                 usb_kill_urb(edge_serial->read_urb);
3040         }
3041 }
3042 
3043 
3044 /****************************************************************************
3045  * edge_release
3046  *      This function is called when the device structure is deallocated.
3047  ****************************************************************************/
3048 static void edge_release(struct usb_serial *serial)
3049 {
3050         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3051 
3052         if (edge_serial->is_epic) {
3053                 usb_kill_urb(edge_serial->interrupt_read_urb);
3054                 usb_free_urb(edge_serial->interrupt_read_urb);
3055                 kfree(edge_serial->interrupt_in_buffer);
3056 
3057                 usb_kill_urb(edge_serial->read_urb);
3058                 usb_free_urb(edge_serial->read_urb);
3059                 kfree(edge_serial->bulk_in_buffer);
3060         }
3061 
3062         kfree(edge_serial);
3063 }
3064 
3065 static int edge_port_probe(struct usb_serial_port *port)
3066 {
3067         struct edgeport_port *edge_port;
3068 
3069         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3070         if (!edge_port)
3071                 return -ENOMEM;
3072 
3073         spin_lock_init(&edge_port->ep_lock);
3074         edge_port->port = port;
3075 
3076         usb_set_serial_port_data(port, edge_port);
3077 
3078         return 0;
3079 }
3080 
3081 static int edge_port_remove(struct usb_serial_port *port)
3082 {
3083         struct edgeport_port *edge_port;
3084 
3085         edge_port = usb_get_serial_port_data(port);
3086         kfree(edge_port);
3087 
3088         return 0;
3089 }
3090 
3091 static struct usb_serial_driver edgeport_2port_device = {
3092         .driver = {
3093                 .owner          = THIS_MODULE,
3094                 .name           = "edgeport_2",
3095         },
3096         .description            = "Edgeport 2 port adapter",
3097         .id_table               = edgeport_2port_id_table,
3098         .num_ports              = 2,
3099         .num_bulk_in            = 1,
3100         .num_bulk_out           = 1,
3101         .num_interrupt_in       = 1,
3102         .open                   = edge_open,
3103         .close                  = edge_close,
3104         .throttle               = edge_throttle,
3105         .unthrottle             = edge_unthrottle,
3106         .attach                 = edge_startup,
3107         .disconnect             = edge_disconnect,
3108         .release                = edge_release,
3109         .port_probe             = edge_port_probe,
3110         .port_remove            = edge_port_remove,
3111         .ioctl                  = edge_ioctl,
3112         .set_termios            = edge_set_termios,
3113         .tiocmget               = edge_tiocmget,
3114         .tiocmset               = edge_tiocmset,
3115         .get_serial             = get_serial_info,
3116         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3117         .get_icount             = usb_serial_generic_get_icount,
3118         .write                  = edge_write,
3119         .write_room             = edge_write_room,
3120         .chars_in_buffer        = edge_chars_in_buffer,
3121         .break_ctl              = edge_break,
3122         .read_int_callback      = edge_interrupt_callback,
3123         .read_bulk_callback     = edge_bulk_in_callback,
3124         .write_bulk_callback    = edge_bulk_out_data_callback,
3125 };
3126 
3127 static struct usb_serial_driver edgeport_4port_device = {
3128         .driver = {
3129                 .owner          = THIS_MODULE,
3130                 .name           = "edgeport_4",
3131         },
3132         .description            = "Edgeport 4 port adapter",
3133         .id_table               = edgeport_4port_id_table,
3134         .num_ports              = 4,
3135         .num_bulk_in            = 1,
3136         .num_bulk_out           = 1,
3137         .num_interrupt_in       = 1,
3138         .open                   = edge_open,
3139         .close                  = edge_close,
3140         .throttle               = edge_throttle,
3141         .unthrottle             = edge_unthrottle,
3142         .attach                 = edge_startup,
3143         .disconnect             = edge_disconnect,
3144         .release                = edge_release,
3145         .port_probe             = edge_port_probe,
3146         .port_remove            = edge_port_remove,
3147         .ioctl                  = edge_ioctl,
3148         .set_termios            = edge_set_termios,
3149         .tiocmget               = edge_tiocmget,
3150         .tiocmset               = edge_tiocmset,
3151         .get_serial             = get_serial_info,
3152         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3153         .get_icount             = usb_serial_generic_get_icount,
3154         .write                  = edge_write,
3155         .write_room             = edge_write_room,
3156         .chars_in_buffer        = edge_chars_in_buffer,
3157         .break_ctl              = edge_break,
3158         .read_int_callback      = edge_interrupt_callback,
3159         .read_bulk_callback     = edge_bulk_in_callback,
3160         .write_bulk_callback    = edge_bulk_out_data_callback,
3161 };
3162 
3163 static struct usb_serial_driver edgeport_8port_device = {
3164         .driver = {
3165                 .owner          = THIS_MODULE,
3166                 .name           = "edgeport_8",
3167         },
3168         .description            = "Edgeport 8 port adapter",
3169         .id_table               = edgeport_8port_id_table,
3170         .num_ports              = 8,
3171         .num_bulk_in            = 1,
3172         .num_bulk_out           = 1,
3173         .num_interrupt_in       = 1,
3174         .open                   = edge_open,
3175         .close                  = edge_close,
3176         .throttle               = edge_throttle,
3177         .unthrottle             = edge_unthrottle,
3178         .attach                 = edge_startup,
3179         .disconnect             = edge_disconnect,
3180         .release                = edge_release,
3181         .port_probe             = edge_port_probe,
3182         .port_remove            = edge_port_remove,
3183         .ioctl                  = edge_ioctl,
3184         .set_termios            = edge_set_termios,
3185         .tiocmget               = edge_tiocmget,
3186         .tiocmset               = edge_tiocmset,
3187         .get_serial             = get_serial_info,
3188         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3189         .get_icount             = usb_serial_generic_get_icount,
3190         .write                  = edge_write,
3191         .write_room             = edge_write_room,
3192         .chars_in_buffer        = edge_chars_in_buffer,
3193         .break_ctl              = edge_break,
3194         .read_int_callback      = edge_interrupt_callback,
3195         .read_bulk_callback     = edge_bulk_in_callback,
3196         .write_bulk_callback    = edge_bulk_out_data_callback,
3197 };
3198 
3199 static struct usb_serial_driver epic_device = {
3200         .driver = {
3201                 .owner          = THIS_MODULE,
3202                 .name           = "epic",
3203         },
3204         .description            = "EPiC device",
3205         .id_table               = Epic_port_id_table,
3206         .num_ports              = 1,
3207         .num_bulk_in            = 1,
3208         .num_bulk_out           = 1,
3209         .num_interrupt_in       = 1,
3210         .open                   = edge_open,
3211         .close                  = edge_close,
3212         .throttle               = edge_throttle,
3213         .unthrottle             = edge_unthrottle,
3214         .attach                 = edge_startup,
3215         .disconnect             = edge_disconnect,
3216         .release                = edge_release,
3217         .port_probe             = edge_port_probe,
3218         .port_remove            = edge_port_remove,
3219         .ioctl                  = edge_ioctl,
3220         .set_termios            = edge_set_termios,
3221         .tiocmget               = edge_tiocmget,
3222         .tiocmset               = edge_tiocmset,
3223         .get_serial             = get_serial_info,
3224         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3225         .get_icount             = usb_serial_generic_get_icount,
3226         .write                  = edge_write,
3227         .write_room             = edge_write_room,
3228         .chars_in_buffer        = edge_chars_in_buffer,
3229         .break_ctl              = edge_break,
3230         .read_int_callback      = edge_interrupt_callback,
3231         .read_bulk_callback     = edge_bulk_in_callback,
3232         .write_bulk_callback    = edge_bulk_out_data_callback,
3233 };
3234 
3235 static struct usb_serial_driver * const serial_drivers[] = {
3236         &edgeport_2port_device, &edgeport_4port_device,
3237         &edgeport_8port_device, &epic_device, NULL
3238 };
3239 
3240 module_usb_serial_driver(serial_drivers, id_table_combined);
3241 
3242 MODULE_AUTHOR(DRIVER_AUTHOR);
3243 MODULE_DESCRIPTION(DRIVER_DESC);
3244 MODULE_LICENSE("GPL");
3245 MODULE_FIRMWARE("edgeport/boot.fw");
3246 MODULE_FIRMWARE("edgeport/boot2.fw");
3247 MODULE_FIRMWARE("edgeport/down.fw");
3248 MODULE_FIRMWARE("edgeport/down2.fw");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/usb/serial/io_edgeport.c

DEFINITIONS
