usb/serial/io_edgeport.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Edgeport USB Serial Converter driver
0004  *
0005  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
0006  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
0007  *
0008  * Supports the following devices:
0009  *  Edgeport/4
0010  *  Edgeport/4t
0011  *  Edgeport/2
0012  *  Edgeport/4i
0013  *  Edgeport/2i
0014  *  Edgeport/421
0015  *  Edgeport/21
0016  *  Rapidport/4
0017  *  Edgeport/8
0018  *  Edgeport/2D8
0019  *  Edgeport/4D8
0020  *  Edgeport/8i
0021  *
0022  * For questions or problems with this driver, contact Inside Out
0023  * Networks technical support, or Peter Berger <pberger@brimson.com>,
0024  * or Al Borchers <alborchers@steinerpoint.com>.
0025  *
0026  */
0027
0028 #include <linux/kernel.h>
0029 #include <linux/jiffies.h>
0030 #include <linux/errno.h>
0031 #include <linux/slab.h>
0032 #include <linux/tty.h>
0033 #include <linux/tty_driver.h>
0034 #include <linux/tty_flip.h>
0035 #include <linux/module.h>
0036 #include <linux/spinlock.h>
0037 #include <linux/serial.h>
0038 #include <linux/ioctl.h>
0039 #include <linux/wait.h>
0040 #include <linux/firmware.h>
0041 #include <linux/ihex.h>
0042 #include <linux/uaccess.h>
0043 #include <linux/usb.h>
0044 #include <linux/usb/serial.h>
0045 #include "io_edgeport.h"
0046 #include "io_ionsp.h"       /* info for the iosp messages */
0047 #include "io_16654.h"       /* 16654 UART defines */
0048
0049 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
0050 #define DRIVER_DESC "Edgeport USB Serial Driver"
0051
0052 #define MAX_NAME_LEN        64
0053
0054 #define OPEN_TIMEOUT        (5*HZ)      /* 5 seconds */
0055
0056 static const struct usb_device_id edgeport_2port_id_table[] = {
0057     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
0058     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
0059     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
0060     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
0061     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
0062     { }
0063 };
0064
0065 static const struct usb_device_id edgeport_4port_id_table[] = {
0066     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
0067     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
0068     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
0069     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
0070     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
0071     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
0072     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
0073     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
0074     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
0075     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
0076     { }
0077 };
0078
0079 static const struct usb_device_id edgeport_8port_id_table[] = {
0080     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
0081     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
0082     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
0083     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
0084     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
0085     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
0086     { }
0087 };
0088
0089 static const struct usb_device_id Epic_port_id_table[] = {
0090     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
0091     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
0092     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
0093     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
0094     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
0095     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
0096     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
0097     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
0098     { }
0099 };
0100
0101 /* Devices that this driver supports */
0102 static const struct usb_device_id id_table_combined[] = {
0103     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
0104     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
0105     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
0106     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
0107     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
0108     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
0109     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
0110     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
0111     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
0112     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
0113     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
0114     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
0115     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
0116     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
0117     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
0118     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
0119     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
0120     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
0121     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
0122     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
0123     { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
0124     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
0125     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
0126     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
0127     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
0128     { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
0129     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
0130     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
0131     { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
0132     { } /* Terminating entry */
0133 };
0134
0135 MODULE_DEVICE_TABLE(usb, id_table_combined);
0136
0137
0138 /* receive port state */
0139 enum RXSTATE {
0140     EXPECT_HDR1 = 0,    /* Expect header byte 1 */
0141     EXPECT_HDR2 = 1,    /* Expect header byte 2 */
0142     EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
0143     EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
0144 };
0145
0146
0147 /* Transmit Fifo
0148  * This Transmit queue is an extension of the edgeport Rx buffer.
0149  * The maximum amount of data buffered in both the edgeport
0150  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
0151  */
0152 struct TxFifo {
0153     unsigned int    head;   /* index to head pointer (write) */
0154     unsigned int    tail;   /* index to tail pointer (read)  */
0155     unsigned int    count;  /* Bytes in queue */
0156     unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
0157     unsigned char   *fifo;  /* allocated Buffer */
0158 };
0159
0160 /* This structure holds all of the local port information */
0161 struct edgeport_port {
0162     __u16           txCredits;      /* our current credits for this port */
0163     __u16           maxTxCredits;       /* the max size of the port */
0164
0165     struct TxFifo       txfifo;         /* transmit fifo -- size will be maxTxCredits */
0166     struct urb      *write_urb;     /* write URB for this port */
0167     bool            write_in_progress;  /* 'true' while a write URB is outstanding */
0168     spinlock_t      ep_lock;
0169
0170     __u8            shadowLCR;      /* last LCR value received */
0171     __u8            shadowMCR;      /* last MCR value received */
0172     __u8            shadowMSR;      /* last MSR value received */
0173     __u8            shadowLSR;      /* last LSR value received */
0174     __u8            shadowXonChar;      /* last value set as XON char in Edgeport */
0175     __u8            shadowXoffChar;     /* last value set as XOFF char in Edgeport */
0176     __u8            validDataMask;
0177     __u32           baudRate;
0178
0179     bool            open;
0180     bool            openPending;
0181     bool            commandPending;
0182     bool            closePending;
0183     bool            chaseResponsePending;
0184
0185     wait_queue_head_t   wait_chase;     /* for handling sleeping while waiting for chase to finish */
0186     wait_queue_head_t   wait_open;      /* for handling sleeping while waiting for open to finish */
0187     wait_queue_head_t   wait_command;       /* for handling sleeping while waiting for command to finish */
0188
0189     struct usb_serial_port  *port;          /* loop back to the owner of this object */
0190 };
0191
0192
0193 /* This structure holds all of the individual device information */
0194 struct edgeport_serial {
0195     char            name[MAX_NAME_LEN+2];       /* string name of this device */
0196
0197     struct edge_manuf_descriptor    manuf_descriptor;   /* the manufacturer descriptor */
0198     struct edge_boot_descriptor boot_descriptor;    /* the boot firmware descriptor */
0199     struct edgeport_product_info    product_info;       /* Product Info */
0200     struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
0201     int         is_epic;            /* flag if EPiC device or not */
0202
0203     __u8            interrupt_in_endpoint;      /* the interrupt endpoint handle */
0204     unsigned char       *interrupt_in_buffer;       /* the buffer we use for the interrupt endpoint */
0205     struct urb      *interrupt_read_urb;        /* our interrupt urb */
0206
0207     __u8            bulk_in_endpoint;       /* the bulk in endpoint handle */
0208     unsigned char       *bulk_in_buffer;        /* the buffer we use for the bulk in endpoint */
0209     struct urb      *read_urb;          /* our bulk read urb */
0210     bool            read_in_progress;
0211     spinlock_t      es_lock;
0212
0213     __u8            bulk_out_endpoint;      /* the bulk out endpoint handle */
0214
0215     __s16           rxBytesAvail;           /* the number of bytes that we need to read from this device */
0216
0217     enum RXSTATE        rxState;            /* the current state of the bulk receive processor */
0218     __u8            rxHeader1;          /* receive header byte 1 */
0219     __u8            rxHeader2;          /* receive header byte 2 */
0220     __u8            rxHeader3;          /* receive header byte 3 */
0221     __u8            rxPort;             /* the port that we are currently receiving data for */
0222     __u8            rxStatusCode;           /* the receive status code */
0223     __u8            rxStatusParam;          /* the receive status parameter */
0224     __s16           rxBytesRemaining;       /* the number of port bytes left to read */
0225     struct usb_serial   *serial;            /* loop back to the owner of this object */
0226 };
0227
0228 /* baud rate information */
0229 struct divisor_table_entry {
0230     __u32   BaudRate;
0231     __u16  Divisor;
0232 };
0233
0234 /*
0235  * Define table of divisors for Rev A EdgePort/4 hardware
0236  * These assume a 3.6864MHz crystal, the standard /16, and
0237  * MCR.7 = 0.
0238  */
0239
0240 static const struct divisor_table_entry divisor_table[] = {
0241     {   50,     4608},
0242     {   75,     3072},
0243     {   110,    2095},  /* 2094.545455 => 230450   => .0217 % over */
0244     {   134,    1713},  /* 1713.011152 => 230398.5 => .00065% under */
0245     {   150,    1536},
0246     {   300,    768},
0247     {   600,    384},
0248     {   1200,   192},
0249     {   1800,   128},
0250     {   2400,   96},
0251     {   4800,   48},
0252     {   7200,   32},
0253     {   9600,   24},
0254     {   14400,  16},
0255     {   19200,  12},
0256     {   38400,  6},
0257     {   57600,  4},
0258     {   115200, 2},
0259     {   230400, 1},
0260 };
0261
0262 /* Number of outstanding Command Write Urbs */
0263 static atomic_t CmdUrbs = ATOMIC_INIT(0);
0264
0265
0266 /* function prototypes */
0267
0268 static void edge_close(struct usb_serial_port *port);
0269
0270 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
0271                 unsigned char *buffer, __u16 bufferLength);
0272 static void process_rcvd_status(struct edgeport_serial *edge_serial,
0273                 __u8 byte2, __u8 byte3);
0274 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
0275         int length);
0276 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
0277 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
0278                 __u8 lsr, __u8 data);
0279 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
0280                 __u8 param);
0281 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
0282 static void change_port_settings(struct tty_struct *tty,
0283                 struct edgeport_port *edge_port,
0284                 struct ktermios *old_termios);
0285 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
0286                 __u8 regNum, __u8 regValue);
0287 static int  write_cmd_usb(struct edgeport_port *edge_port,
0288                 unsigned char *buffer, int writeLength);
0289 static void send_more_port_data(struct edgeport_serial *edge_serial,
0290                 struct edgeport_port *edge_port);
0291
0292 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
0293                     __u16 length, const __u8 *data);
0294
0295 /* ************************************************************************ */
0296 /* ************************************************************************ */
0297 /* ************************************************************************ */
0298 /* ************************************************************************ */
0299
0300 /************************************************************************
0301  *                                  *
0302  * update_edgeport_E2PROM() Compare current versions of     *
0303  *              Boot ROM and Manufacture        *
0304  *              Descriptors with versions       *
0305  *              embedded in this driver         *
0306  *                                  *
0307  ************************************************************************/
0308 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
0309 {
0310     struct device *dev = &edge_serial->serial->dev->dev;
0311     __u32 BootCurVer;
0312     __u32 BootNewVer;
0313     __u8 BootMajorVersion;
0314     __u8 BootMinorVersion;
0315     __u16 BootBuildNumber;
0316     __u32 Bootaddr;
0317     const struct ihex_binrec *rec;
0318     const struct firmware *fw;
0319     const char *fw_name;
0320     int response;
0321
0322     switch (edge_serial->product_info.iDownloadFile) {
0323     case EDGE_DOWNLOAD_FILE_I930:
0324         fw_name = "edgeport/boot.fw";
0325         break;
0326     case EDGE_DOWNLOAD_FILE_80251:
0327         fw_name = "edgeport/boot2.fw";
0328         break;
0329     default:
0330         return;
0331     }
0332
0333     response = request_ihex_firmware(&fw, fw_name,
0334                      &edge_serial->serial->dev->dev);
0335     if (response) {
0336         dev_err(dev, "Failed to load image \"%s\" err %d\n",
0337                fw_name, response);
0338         return;
0339     }
0340
0341     rec = (const struct ihex_binrec *)fw->data;
0342     BootMajorVersion = rec->data[0];
0343     BootMinorVersion = rec->data[1];
0344     BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
0345
0346     /* Check Boot Image Version */
0347     BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
0348              (edge_serial->boot_descriptor.MinorVersion << 16) +
0349               le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
0350
0351     BootNewVer = (BootMajorVersion << 24) +
0352              (BootMinorVersion << 16) +
0353               BootBuildNumber;
0354
0355     dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
0356         edge_serial->boot_descriptor.MajorVersion,
0357         edge_serial->boot_descriptor.MinorVersion,
0358         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
0359
0360
0361     if (BootNewVer > BootCurVer) {
0362         dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
0363             edge_serial->boot_descriptor.MajorVersion,
0364             edge_serial->boot_descriptor.MinorVersion,
0365             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
0366             BootMajorVersion, BootMinorVersion, BootBuildNumber);
0367
0368         dev_dbg(dev, "Downloading new Boot Image\n");
0369
0370         for (rec = ihex_next_binrec(rec); rec;
0371              rec = ihex_next_binrec(rec)) {
0372             Bootaddr = be32_to_cpu(rec->addr);
0373             response = rom_write(edge_serial->serial,
0374                          Bootaddr >> 16,
0375                          Bootaddr & 0xFFFF,
0376                          be16_to_cpu(rec->len),
0377                          &rec->data[0]);
0378             if (response < 0) {
0379                 dev_err(&edge_serial->serial->dev->dev,
0380                     "rom_write failed (%x, %x, %d)\n",
0381                     Bootaddr >> 16, Bootaddr & 0xFFFF,
0382                     be16_to_cpu(rec->len));
0383                 break;
0384             }
0385         }
0386     } else {
0387         dev_dbg(dev, "Boot Image -- already up to date\n");
0388     }
0389     release_firmware(fw);
0390 }
0391
0392 static void dump_product_info(struct edgeport_serial *edge_serial,
0393                   struct edgeport_product_info *product_info)
0394 {
0395     struct device *dev = &edge_serial->serial->dev->dev;
0396
0397     /* Dump Product Info structure */
0398     dev_dbg(dev, "**Product Information:\n");
0399     dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
0400     dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
0401     dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
0402     dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
0403     dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
0404     dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
0405     dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
0406     dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
0407     dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
0408     dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
0409     dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
0410     dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
0411         product_info->BootMajorVersion,
0412         product_info->BootMinorVersion,
0413         le16_to_cpu(product_info->BootBuildNumber));
0414     dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
0415         product_info->FirmwareMajorVersion,
0416         product_info->FirmwareMinorVersion,
0417         le16_to_cpu(product_info->FirmwareBuildNumber));
0418     dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
0419         product_info->ManufactureDescDate[0],
0420         product_info->ManufactureDescDate[1],
0421         product_info->ManufactureDescDate[2]+1900);
0422     dev_dbg(dev, "  iDownloadFile         0x%x\n",
0423         product_info->iDownloadFile);
0424     dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
0425 }
0426
0427 static void get_product_info(struct edgeport_serial *edge_serial)
0428 {
0429     struct edgeport_product_info *product_info = &edge_serial->product_info;
0430
0431     memset(product_info, 0, sizeof(struct edgeport_product_info));
0432
0433     product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
0434     product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
0435     product_info->ProdInfoVer = 0;
0436
0437     product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
0438     product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
0439     product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
0440     product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
0441
0442     product_info->BootMajorVersion =
0443                 edge_serial->boot_descriptor.MajorVersion;
0444     product_info->BootMinorVersion =
0445                 edge_serial->boot_descriptor.MinorVersion;
0446     product_info->BootBuildNumber =
0447                 edge_serial->boot_descriptor.BuildNumber;
0448
0449     memcpy(product_info->ManufactureDescDate,
0450             edge_serial->manuf_descriptor.DescDate,
0451             sizeof(edge_serial->manuf_descriptor.DescDate));
0452
0453     /* check if this is 2nd generation hardware */
0454     if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
0455                         & ION_DEVICE_ID_80251_NETCHIP)
0456         product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
0457     else
0458         product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
0459
0460     /* Determine Product type and set appropriate flags */
0461     switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
0462     case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
0463     case ION_DEVICE_ID_EDGEPORT_4T:
0464     case ION_DEVICE_ID_EDGEPORT_4:
0465     case ION_DEVICE_ID_EDGEPORT_2:
0466     case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
0467     case ION_DEVICE_ID_EDGEPORT_8:
0468     case ION_DEVICE_ID_EDGEPORT_421:
0469     case ION_DEVICE_ID_EDGEPORT_21:
0470     case ION_DEVICE_ID_EDGEPORT_2_DIN:
0471     case ION_DEVICE_ID_EDGEPORT_4_DIN:
0472     case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
0473         product_info->IsRS232 = 1;
0474         break;
0475
0476     case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
0477         product_info->IsRS422 = 1;
0478         product_info->IsRS485 = 1;
0479         break;
0480
0481     case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
0482     case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
0483         product_info->IsRS422 = 1;
0484         break;
0485     }
0486
0487     dump_product_info(edge_serial, product_info);
0488 }
0489
0490 static int get_epic_descriptor(struct edgeport_serial *ep)
0491 {
0492     int result;
0493     struct usb_serial *serial = ep->serial;
0494     struct edgeport_product_info *product_info = &ep->product_info;
0495     struct edge_compatibility_descriptor *epic;
0496     struct edge_compatibility_bits *bits;
0497     struct device *dev = &serial->dev->dev;
0498
0499     ep->is_epic = 0;
0500
0501     epic = kmalloc(sizeof(*epic), GFP_KERNEL);
0502     if (!epic)
0503         return -ENOMEM;
0504
0505     result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
0506                  USB_REQUEST_ION_GET_EPIC_DESC,
0507                  0xC0, 0x00, 0x00,
0508                  epic, sizeof(*epic),
0509                  300);
0510     if (result == sizeof(*epic)) {
0511         ep->is_epic = 1;
0512         memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
0513         memset(product_info, 0, sizeof(struct edgeport_product_info));
0514
0515         product_info->NumPorts = epic->NumPorts;
0516         product_info->ProdInfoVer = 0;
0517         product_info->FirmwareMajorVersion = epic->MajorVersion;
0518         product_info->FirmwareMinorVersion = epic->MinorVersion;
0519         product_info->FirmwareBuildNumber = epic->BuildNumber;
0520         product_info->iDownloadFile = epic->iDownloadFile;
0521         product_info->EpicVer = epic->EpicVer;
0522         product_info->Epic = epic->Supports;
0523         product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
0524         dump_product_info(ep, product_info);
0525
0526         bits = &ep->epic_descriptor.Supports;
0527         dev_dbg(dev, "**EPIC descriptor:\n");
0528         dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
0529         dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen    ? "TRUE": "FALSE");
0530         dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose   ? "TRUE": "FALSE");
0531         dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase   ? "TRUE": "FALSE");
0532         dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
0533         dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
0534         dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
0535         dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
0536         dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
0537         dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
0538         dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
0539         dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
0540         dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
0541
0542         result = 0;
0543     } else if (result >= 0) {
0544         dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
0545              result);
0546         result = -EIO;
0547     }
0548
0549     kfree(epic);
0550
0551     return result;
0552 }
0553
0554
0555 /************************************************************************/
0556 /************************************************************************/
0557 /*            U S B  C A L L B A C K   F U N C T I O N S                */
0558 /*            U S B  C A L L B A C K   F U N C T I O N S                */
0559 /************************************************************************/
0560 /************************************************************************/
0561
0562 /*****************************************************************************
0563  * edge_interrupt_callback
0564  *  this is the callback function for when we have received data on the
0565  *  interrupt endpoint.
0566  *****************************************************************************/
0567 static void edge_interrupt_callback(struct urb *urb)
0568 {
0569     struct edgeport_serial *edge_serial = urb->context;
0570     struct device *dev;
0571     struct edgeport_port *edge_port;
0572     struct usb_serial_port *port;
0573     unsigned char *data = urb->transfer_buffer;
0574     int length = urb->actual_length;
0575     unsigned long flags;
0576     int bytes_avail;
0577     int position;
0578     int txCredits;
0579     int portNumber;
0580     int result;
0581     int status = urb->status;
0582
0583     switch (status) {
0584     case 0:
0585         /* success */
0586         break;
0587     case -ECONNRESET:
0588     case -ENOENT:
0589     case -ESHUTDOWN:
0590         /* this urb is terminated, clean up */
0591         dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
0592         return;
0593     default:
0594         dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
0595         goto exit;
0596     }
0597
0598     dev = &edge_serial->serial->dev->dev;
0599
0600     /* process this interrupt-read even if there are no ports open */
0601     if (length) {
0602         usb_serial_debug_data(dev, __func__, length, data);
0603
0604         if (length > 1) {
0605             bytes_avail = data[0] | (data[1] << 8);
0606             if (bytes_avail) {
0607                 spin_lock_irqsave(&edge_serial->es_lock, flags);
0608                 edge_serial->rxBytesAvail += bytes_avail;
0609                 dev_dbg(dev,
0610                     "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
0611                     __func__, bytes_avail,
0612                     edge_serial->rxBytesAvail,
0613                     edge_serial->read_in_progress);
0614
0615                 if (edge_serial->rxBytesAvail > 0 &&
0616                     !edge_serial->read_in_progress) {
0617                     dev_dbg(dev, "%s - posting a read\n", __func__);
0618                     edge_serial->read_in_progress = true;
0619
0620                     /* we have pending bytes on the
0621                        bulk in pipe, send a request */
0622                     result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
0623                     if (result) {
0624                         dev_err(dev,
0625                             "%s - usb_submit_urb(read bulk) failed with result = %d\n",
0626                             __func__, result);
0627                         edge_serial->read_in_progress = false;
0628                     }
0629                 }
0630                 spin_unlock_irqrestore(&edge_serial->es_lock,
0631                                flags);
0632             }
0633         }
0634         /* grab the txcredits for the ports if available */
0635         position = 2;
0636         portNumber = 0;
0637         while ((position < length - 1) &&
0638                 (portNumber < edge_serial->serial->num_ports)) {
0639             txCredits = data[position] | (data[position+1] << 8);
0640             if (txCredits) {
0641                 port = edge_serial->serial->port[portNumber];
0642                 edge_port = usb_get_serial_port_data(port);
0643                 if (edge_port && edge_port->open) {
0644                     spin_lock_irqsave(&edge_port->ep_lock,
0645                               flags);
0646                     edge_port->txCredits += txCredits;
0647                     spin_unlock_irqrestore(&edge_port->ep_lock,
0648                                    flags);
0649                     dev_dbg(dev, "%s - txcredits for port%d = %d\n",
0650                         __func__, portNumber,
0651                         edge_port->txCredits);
0652
0653                     /* tell the tty driver that something
0654                        has changed */
0655                     tty_port_tty_wakeup(&edge_port->port->port);
0656                     /* Since we have more credit, check
0657                        if more data can be sent */
0658                     send_more_port_data(edge_serial,
0659                                 edge_port);
0660                 }
0661             }
0662             position += 2;
0663             ++portNumber;
0664         }
0665     }
0666
0667 exit:
0668     result = usb_submit_urb(urb, GFP_ATOMIC);
0669     if (result)
0670         dev_err(&urb->dev->dev,
0671             "%s - Error %d submitting control urb\n",
0672                         __func__, result);
0673 }
0674
0675
0676 /*****************************************************************************
0677  * edge_bulk_in_callback
0678  *  this is the callback function for when we have received data on the
0679  *  bulk in endpoint.
0680  *****************************************************************************/
0681 static void edge_bulk_in_callback(struct urb *urb)
0682 {
0683     struct edgeport_serial  *edge_serial = urb->context;
0684     struct device *dev;
0685     unsigned char       *data = urb->transfer_buffer;
0686     int         retval;
0687     __u16           raw_data_length;
0688     int status = urb->status;
0689     unsigned long flags;
0690
0691     if (status) {
0692         dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
0693             __func__, status);
0694         edge_serial->read_in_progress = false;
0695         return;
0696     }
0697
0698     if (urb->actual_length == 0) {
0699         dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
0700         edge_serial->read_in_progress = false;
0701         return;
0702     }
0703
0704     dev = &edge_serial->serial->dev->dev;
0705     raw_data_length = urb->actual_length;
0706
0707     usb_serial_debug_data(dev, __func__, raw_data_length, data);
0708
0709     spin_lock_irqsave(&edge_serial->es_lock, flags);
0710
0711     /* decrement our rxBytes available by the number that we just got */
0712     edge_serial->rxBytesAvail -= raw_data_length;
0713
0714     dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
0715         raw_data_length, edge_serial->rxBytesAvail);
0716
0717     process_rcvd_data(edge_serial, data, urb->actual_length);
0718
0719     /* check to see if there's any more data for us to read */
0720     if (edge_serial->rxBytesAvail > 0) {
0721         dev_dbg(dev, "%s - posting a read\n", __func__);
0722         retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
0723         if (retval) {
0724             dev_err(dev,
0725                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
0726                 __func__, retval);
0727             edge_serial->read_in_progress = false;
0728         }
0729     } else {
0730         edge_serial->read_in_progress = false;
0731     }
0732
0733     spin_unlock_irqrestore(&edge_serial->es_lock, flags);
0734 }
0735
0736
0737 /*****************************************************************************
0738  * edge_bulk_out_data_callback
0739  *  this is the callback function for when we have finished sending
0740  *  serial data on the bulk out endpoint.
0741  *****************************************************************************/
0742 static void edge_bulk_out_data_callback(struct urb *urb)
0743 {
0744     struct edgeport_port *edge_port = urb->context;
0745     int status = urb->status;
0746
0747     if (status) {
0748         dev_dbg(&urb->dev->dev,
0749             "%s - nonzero write bulk status received: %d\n",
0750             __func__, status);
0751     }
0752
0753     if (edge_port->open)
0754         tty_port_tty_wakeup(&edge_port->port->port);
0755
0756     /* Release the Write URB */
0757     edge_port->write_in_progress = false;
0758
0759     /* Check if more data needs to be sent */
0760     send_more_port_data((struct edgeport_serial *)
0761         (usb_get_serial_data(edge_port->port->serial)), edge_port);
0762 }
0763
0764
0765 /*****************************************************************************
0766  * BulkOutCmdCallback
0767  *  this is the callback function for when we have finished sending a
0768  *  command on the bulk out endpoint.
0769  *****************************************************************************/
0770 static void edge_bulk_out_cmd_callback(struct urb *urb)
0771 {
0772     struct edgeport_port *edge_port = urb->context;
0773     int status = urb->status;
0774
0775     atomic_dec(&CmdUrbs);
0776     dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
0777         __func__, urb, atomic_read(&CmdUrbs));
0778
0779
0780     /* clean up the transfer buffer */
0781     kfree(urb->transfer_buffer);
0782
0783     /* Free the command urb */
0784     usb_free_urb(urb);
0785
0786     if (status) {
0787         dev_dbg(&urb->dev->dev,
0788             "%s - nonzero write bulk status received: %d\n",
0789             __func__, status);
0790         return;
0791     }
0792
0793     /* tell the tty driver that something has changed */
0794     if (edge_port->open)
0795         tty_port_tty_wakeup(&edge_port->port->port);
0796
0797     /* we have completed the command */
0798     edge_port->commandPending = false;
0799     wake_up(&edge_port->wait_command);
0800 }
0801
0802
0803 /*****************************************************************************
0804  * Driver tty interface functions
0805  *****************************************************************************/
0806
0807 /*****************************************************************************
0808  * SerialOpen
0809  *  this function is called by the tty driver when a port is opened
0810  *  If successful, we return 0
0811  *  Otherwise we return a negative error number.
0812  *****************************************************************************/
0813 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
0814 {
0815     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
0816     struct device *dev = &port->dev;
0817     struct usb_serial *serial;
0818     struct edgeport_serial *edge_serial;
0819     int response;
0820
0821     if (edge_port == NULL)
0822         return -ENODEV;
0823
0824     /* see if we've set up our endpoint info yet (can't set it up
0825        in edge_startup as the structures were not set up at that time.) */
0826     serial = port->serial;
0827     edge_serial = usb_get_serial_data(serial);
0828     if (edge_serial == NULL)
0829         return -ENODEV;
0830     if (edge_serial->interrupt_in_buffer == NULL) {
0831         struct usb_serial_port *port0 = serial->port[0];
0832
0833         /* not set up yet, so do it now */
0834         edge_serial->interrupt_in_buffer =
0835                     port0->interrupt_in_buffer;
0836         edge_serial->interrupt_in_endpoint =
0837                     port0->interrupt_in_endpointAddress;
0838         edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
0839         edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
0840         edge_serial->bulk_in_endpoint =
0841                     port0->bulk_in_endpointAddress;
0842         edge_serial->read_urb = port0->read_urb;
0843         edge_serial->bulk_out_endpoint =
0844                     port0->bulk_out_endpointAddress;
0845
0846         /* set up our interrupt urb */
0847         usb_fill_int_urb(edge_serial->interrupt_read_urb,
0848               serial->dev,
0849               usb_rcvintpipe(serial->dev,
0850                 port0->interrupt_in_endpointAddress),
0851               port0->interrupt_in_buffer,
0852               edge_serial->interrupt_read_urb->transfer_buffer_length,
0853               edge_interrupt_callback, edge_serial,
0854               edge_serial->interrupt_read_urb->interval);
0855
0856         /* set up our bulk in urb */
0857         usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
0858             usb_rcvbulkpipe(serial->dev,
0859                 port0->bulk_in_endpointAddress),
0860             port0->bulk_in_buffer,
0861             edge_serial->read_urb->transfer_buffer_length,
0862             edge_bulk_in_callback, edge_serial);
0863         edge_serial->read_in_progress = false;
0864
0865         /* start interrupt read for this edgeport
0866          * this interrupt will continue as long
0867          * as the edgeport is connected */
0868         response = usb_submit_urb(edge_serial->interrupt_read_urb,
0869                                 GFP_KERNEL);
0870         if (response) {
0871             dev_err(dev, "%s - Error %d submitting control urb\n",
0872                 __func__, response);
0873         }
0874     }
0875
0876     /* initialize our wait queues */
0877     init_waitqueue_head(&edge_port->wait_open);
0878     init_waitqueue_head(&edge_port->wait_chase);
0879     init_waitqueue_head(&edge_port->wait_command);
0880
0881     /* initialize our port settings */
0882     edge_port->txCredits = 0;   /* Can't send any data yet */
0883     /* Must always set this bit to enable ints! */
0884     edge_port->shadowMCR = MCR_MASTER_IE;
0885     edge_port->chaseResponsePending = false;
0886
0887     /* send a open port command */
0888     edge_port->openPending = true;
0889     edge_port->open        = false;
0890     response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
0891
0892     if (response < 0) {
0893         dev_err(dev, "%s - error sending open port command\n", __func__);
0894         edge_port->openPending = false;
0895         return -ENODEV;
0896     }
0897
0898     /* now wait for the port to be completely opened */
0899     wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
0900                                 OPEN_TIMEOUT);
0901
0902     if (!edge_port->open) {
0903         /* open timed out */
0904         dev_dbg(dev, "%s - open timeout\n", __func__);
0905         edge_port->openPending = false;
0906         return -ENODEV;
0907     }
0908
0909     /* create the txfifo */
0910     edge_port->txfifo.head  = 0;
0911     edge_port->txfifo.tail  = 0;
0912     edge_port->txfifo.count = 0;
0913     edge_port->txfifo.size  = edge_port->maxTxCredits;
0914     edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
0915
0916     if (!edge_port->txfifo.fifo) {
0917         edge_close(port);
0918         return -ENOMEM;
0919     }
0920
0921     /* Allocate a URB for the write */
0922     edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
0923     edge_port->write_in_progress = false;
0924
0925     if (!edge_port->write_urb) {
0926         edge_close(port);
0927         return -ENOMEM;
0928     }
0929
0930     dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
0931         __func__, edge_port->maxTxCredits);
0932
0933     return 0;
0934 }
0935
0936
0937 /************************************************************************
0938  *
0939  * block_until_chase_response
0940  *
0941  *  This function will block the close until one of the following:
0942  *      1. Response to our Chase comes from Edgeport
0943  *      2. A timeout of 10 seconds without activity has expired
0944  *         (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
0945  *
0946  ************************************************************************/
0947 static void block_until_chase_response(struct edgeport_port *edge_port)
0948 {
0949     struct device *dev = &edge_port->port->dev;
0950     DEFINE_WAIT(wait);
0951     __u16 lastCredits;
0952     int timeout = 1*HZ;
0953     int loop = 10;
0954
0955     while (1) {
0956         /* Save Last credits */
0957         lastCredits = edge_port->txCredits;
0958
0959         /* Did we get our Chase response */
0960         if (!edge_port->chaseResponsePending) {
0961             dev_dbg(dev, "%s - Got Chase Response\n", __func__);
0962
0963             /* did we get all of our credit back? */
0964             if (edge_port->txCredits == edge_port->maxTxCredits) {
0965                 dev_dbg(dev, "%s - Got all credits\n", __func__);
0966                 return;
0967             }
0968         }
0969
0970         /* Block the thread for a while */
0971         prepare_to_wait(&edge_port->wait_chase, &wait,
0972                         TASK_UNINTERRUPTIBLE);
0973         schedule_timeout(timeout);
0974         finish_wait(&edge_port->wait_chase, &wait);
0975
0976         if (lastCredits == edge_port->txCredits) {
0977             /* No activity.. count down. */
0978             loop--;
0979             if (loop == 0) {
0980                 edge_port->chaseResponsePending = false;
0981                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
0982                 return;
0983             }
0984         } else {
0985             /* Reset timeout value back to 10 seconds */
0986             dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
0987                     lastCredits, edge_port->txCredits);
0988             loop = 10;
0989         }
0990     }
0991 }
0992
0993
0994 /************************************************************************
0995  *
0996  * block_until_tx_empty
0997  *
0998  *  This function will block the close until one of the following:
0999  *      1. TX count are 0
1000  *      2. The edgeport has stopped
1001  *      3. A timeout of 3 seconds without activity has expired
1002  *
1003  ************************************************************************/
1004 static void block_until_tx_empty(struct edgeport_port *edge_port)
1005 {
1006     struct device *dev = &edge_port->port->dev;
1007     DEFINE_WAIT(wait);
1008     struct TxFifo *fifo = &edge_port->txfifo;
1009     __u32 lastCount;
1010     int timeout = HZ/10;
1011     int loop = 30;
1012
1013     while (1) {
1014         /* Save Last count */
1015         lastCount = fifo->count;
1016
1017         /* Is the Edgeport Buffer empty? */
1018         if (lastCount == 0) {
1019             dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1020             return;
1021         }
1022
1023         /* Block the thread for a while */
1024         prepare_to_wait(&edge_port->wait_chase, &wait,
1025                         TASK_UNINTERRUPTIBLE);
1026         schedule_timeout(timeout);
1027         finish_wait(&edge_port->wait_chase, &wait);
1028
1029         dev_dbg(dev, "%s wait\n", __func__);
1030
1031         if (lastCount == fifo->count) {
1032             /* No activity.. count down. */
1033             loop--;
1034             if (loop == 0) {
1035                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1036                 return;
1037             }
1038         } else {
1039             /* Reset timeout value back to seconds */
1040             loop = 30;
1041         }
1042     }
1043 }
1044
1045
1046 /*****************************************************************************
1047  * edge_close
1048  *  this function is called by the tty driver when a port is closed
1049  *****************************************************************************/
1050 static void edge_close(struct usb_serial_port *port)
1051 {
1052     struct edgeport_serial *edge_serial;
1053     struct edgeport_port *edge_port;
1054     int status;
1055
1056     edge_serial = usb_get_serial_data(port->serial);
1057     edge_port = usb_get_serial_port_data(port);
1058     if (edge_serial == NULL || edge_port == NULL)
1059         return;
1060
1061     /* block until tx is empty */
1062     block_until_tx_empty(edge_port);
1063
1064     edge_port->closePending = true;
1065
1066     if (!edge_serial->is_epic ||
1067         edge_serial->epic_descriptor.Supports.IOSPChase) {
1068         /* flush and chase */
1069         edge_port->chaseResponsePending = true;
1070
1071         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1072         status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1073         if (status == 0)
1074             /* block until chase finished */
1075             block_until_chase_response(edge_port);
1076         else
1077             edge_port->chaseResponsePending = false;
1078     }
1079
1080     if (!edge_serial->is_epic ||
1081         edge_serial->epic_descriptor.Supports.IOSPClose) {
1082            /* close the port */
1083         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1084         send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1085     }
1086
1087     /* port->close = true; */
1088     edge_port->closePending = false;
1089     edge_port->open = false;
1090     edge_port->openPending = false;
1091
1092     usb_kill_urb(edge_port->write_urb);
1093
1094     if (edge_port->write_urb) {
1095         /* if this urb had a transfer buffer already
1096                 (old transfer) free it */
1097         kfree(edge_port->write_urb->transfer_buffer);
1098         usb_free_urb(edge_port->write_urb);
1099         edge_port->write_urb = NULL;
1100     }
1101     kfree(edge_port->txfifo.fifo);
1102     edge_port->txfifo.fifo = NULL;
1103 }
1104
1105 /*****************************************************************************
1106  * SerialWrite
1107  *  this function is called by the tty driver when data should be written
1108  *  to the port.
1109  *  If successful, we return the number of bytes written, otherwise we
1110  *  return a negative error number.
1111  *****************************************************************************/
1112 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1113                     const unsigned char *data, int count)
1114 {
1115     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1116     struct TxFifo *fifo;
1117     int copySize;
1118     int bytesleft;
1119     int firsthalf;
1120     int secondhalf;
1121     unsigned long flags;
1122
1123     if (edge_port == NULL)
1124         return -ENODEV;
1125
1126     /* get a pointer to the Tx fifo */
1127     fifo = &edge_port->txfifo;
1128
1129     spin_lock_irqsave(&edge_port->ep_lock, flags);
1130
1131     /* calculate number of bytes to put in fifo */
1132     copySize = min((unsigned int)count,
1133                 (edge_port->txCredits - fifo->count));
1134
1135     dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1136         __func__, count, edge_port->txCredits - fifo->count, copySize);
1137
1138     /* catch writes of 0 bytes which the tty driver likes to give us,
1139        and when txCredits is empty */
1140     if (copySize == 0) {
1141         dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1142         goto finish_write;
1143     }
1144
1145     /* queue the data
1146      * since we can never overflow the buffer we do not have to check for a
1147      * full condition
1148      *
1149      * the copy is done is two parts -- first fill to the end of the buffer
1150      * then copy the reset from the start of the buffer
1151      */
1152     bytesleft = fifo->size - fifo->head;
1153     firsthalf = min(bytesleft, copySize);
1154     dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1155         firsthalf, bytesleft);
1156
1157     /* now copy our data */
1158     memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1159     usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1160
1161     /* update the index and size */
1162     fifo->head  += firsthalf;
1163     fifo->count += firsthalf;
1164
1165     /* wrap the index */
1166     if (fifo->head == fifo->size)
1167         fifo->head = 0;
1168
1169     secondhalf = copySize-firsthalf;
1170
1171     if (secondhalf) {
1172         dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1173         memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1174         usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1175         /* update the index and size */
1176         fifo->count += secondhalf;
1177         fifo->head  += secondhalf;
1178         /* No need to check for wrap since we can not get to end of
1179          * the fifo in this part
1180          */
1181     }
1182
1183 finish_write:
1184     spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1185
1186     send_more_port_data((struct edgeport_serial *)
1187             usb_get_serial_data(port->serial), edge_port);
1188
1189     dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1190         __func__, copySize, edge_port->txCredits, fifo->count);
1191
1192     return copySize;
1193 }
1194
1195
1196 /************************************************************************
1197  *
1198  * send_more_port_data()
1199  *
1200  *  This routine attempts to write additional UART transmit data
1201  *  to a port over the USB bulk pipe. It is called (1) when new
1202  *  data has been written to a port's TxBuffer from higher layers
1203  *  (2) when the peripheral sends us additional TxCredits indicating
1204  *  that it can accept more Tx data for a given port; and (3) when
1205  *  a bulk write completes successfully and we want to see if we
1206  *  can transmit more.
1207  *
1208  ************************************************************************/
1209 static void send_more_port_data(struct edgeport_serial *edge_serial,
1210                     struct edgeport_port *edge_port)
1211 {
1212     struct TxFifo   *fifo = &edge_port->txfifo;
1213     struct device   *dev = &edge_port->port->dev;
1214     struct urb  *urb;
1215     unsigned char   *buffer;
1216     int     status;
1217     int     count;
1218     int     bytesleft;
1219     int     firsthalf;
1220     int     secondhalf;
1221     unsigned long   flags;
1222
1223     spin_lock_irqsave(&edge_port->ep_lock, flags);
1224
1225     if (edge_port->write_in_progress ||
1226         !edge_port->open             ||
1227         (fifo->count == 0)) {
1228         dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1229             __func__, fifo->count, edge_port->write_in_progress);
1230         goto exit_send;
1231     }
1232
1233     /* since the amount of data in the fifo will always fit into the
1234      * edgeport buffer we do not need to check the write length
1235      *
1236      * Do we have enough credits for this port to make it worthwhile
1237      * to bother queueing a write. If it's too small, say a few bytes,
1238      * it's better to wait for more credits so we can do a larger write.
1239      */
1240     if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1241         dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1242             __func__, fifo->count, edge_port->txCredits);
1243         goto exit_send;
1244     }
1245
1246     /* lock this write */
1247     edge_port->write_in_progress = true;
1248
1249     /* get a pointer to the write_urb */
1250     urb = edge_port->write_urb;
1251
1252     /* make sure transfer buffer is freed */
1253     kfree(urb->transfer_buffer);
1254     urb->transfer_buffer = NULL;
1255
1256     /* build the data header for the buffer and port that we are about
1257        to send out */
1258     count = fifo->count;
1259     buffer = kmalloc(count+2, GFP_ATOMIC);
1260     if (!buffer) {
1261         edge_port->write_in_progress = false;
1262         goto exit_send;
1263     }
1264     buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1265     buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1266
1267     /* now copy our data */
1268     bytesleft =  fifo->size - fifo->tail;
1269     firsthalf = min(bytesleft, count);
1270     memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1271     fifo->tail  += firsthalf;
1272     fifo->count -= firsthalf;
1273     if (fifo->tail == fifo->size)
1274         fifo->tail = 0;
1275
1276     secondhalf = count-firsthalf;
1277     if (secondhalf) {
1278         memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1279                                 secondhalf);
1280         fifo->tail  += secondhalf;
1281         fifo->count -= secondhalf;
1282     }
1283
1284     if (count)
1285         usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1286
1287     /* fill up the urb with all of our data and submit it */
1288     usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1289             usb_sndbulkpipe(edge_serial->serial->dev,
1290                     edge_serial->bulk_out_endpoint),
1291             buffer, count+2,
1292             edge_bulk_out_data_callback, edge_port);
1293
1294     /* decrement the number of credits we have by the number we just sent */
1295     edge_port->txCredits -= count;
1296     edge_port->port->icount.tx += count;
1297
1298     status = usb_submit_urb(urb, GFP_ATOMIC);
1299     if (status) {
1300         /* something went wrong */
1301         dev_err_console(edge_port->port,
1302             "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1303                 __func__, status);
1304         edge_port->write_in_progress = false;
1305
1306         /* revert the credits as something bad happened. */
1307         edge_port->txCredits += count;
1308         edge_port->port->icount.tx -= count;
1309     }
1310     dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1311         __func__, count, edge_port->txCredits, fifo->count);
1312
1313 exit_send:
1314     spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1315 }
1316
1317
1318 /*****************************************************************************
1319  * edge_write_room
1320  *  this function is called by the tty driver when it wants to know how
1321  *  many bytes of data we can accept for a specific port.
1322  *****************************************************************************/
1323 static unsigned int edge_write_room(struct tty_struct *tty)
1324 {
1325     struct usb_serial_port *port = tty->driver_data;
1326     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1327     unsigned int room;
1328     unsigned long flags;
1329
1330     /* total of both buffers is still txCredit */
1331     spin_lock_irqsave(&edge_port->ep_lock, flags);
1332     room = edge_port->txCredits - edge_port->txfifo.count;
1333     spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1334
1335     dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
1336     return room;
1337 }
1338
1339
1340 /*****************************************************************************
1341  * edge_chars_in_buffer
1342  *  this function is called by the tty driver when it wants to know how
1343  *  many bytes of data we currently have outstanding in the port (data that
1344  *  has been written, but hasn't made it out the port yet)
1345  *****************************************************************************/
1346 static unsigned int edge_chars_in_buffer(struct tty_struct *tty)
1347 {
1348     struct usb_serial_port *port = tty->driver_data;
1349     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1350     unsigned int num_chars;
1351     unsigned long flags;
1352
1353     spin_lock_irqsave(&edge_port->ep_lock, flags);
1354     num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1355                         edge_port->txfifo.count;
1356     spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1357     if (num_chars) {
1358         dev_dbg(&port->dev, "%s - returns %u\n", __func__, num_chars);
1359     }
1360
1361     return num_chars;
1362 }
1363
1364
1365 /*****************************************************************************
1366  * SerialThrottle
1367  *  this function is called by the tty driver when it wants to stop the data
1368  *  being read from the port.
1369  *****************************************************************************/
1370 static void edge_throttle(struct tty_struct *tty)
1371 {
1372     struct usb_serial_port *port = tty->driver_data;
1373     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1374     int status;
1375
1376     if (edge_port == NULL)
1377         return;
1378
1379     if (!edge_port->open) {
1380         dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1381         return;
1382     }
1383
1384     /* if we are implementing XON/XOFF, send the stop character */
1385     if (I_IXOFF(tty)) {
1386         unsigned char stop_char = STOP_CHAR(tty);
1387         status = edge_write(tty, port, &stop_char, 1);
1388         if (status <= 0)
1389             return;
1390     }
1391
1392     /* if we are implementing RTS/CTS, toggle that line */
1393     if (C_CRTSCTS(tty)) {
1394         edge_port->shadowMCR &= ~MCR_RTS;
1395         status = send_cmd_write_uart_register(edge_port, MCR,
1396                             edge_port->shadowMCR);
1397         if (status != 0)
1398             return;
1399     }
1400 }
1401
1402
1403 /*****************************************************************************
1404  * edge_unthrottle
1405  *  this function is called by the tty driver when it wants to resume the
1406  *  data being read from the port (called after SerialThrottle is called)
1407  *****************************************************************************/
1408 static void edge_unthrottle(struct tty_struct *tty)
1409 {
1410     struct usb_serial_port *port = tty->driver_data;
1411     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1412     int status;
1413
1414     if (edge_port == NULL)
1415         return;
1416
1417     if (!edge_port->open) {
1418         dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1419         return;
1420     }
1421
1422     /* if we are implementing XON/XOFF, send the start character */
1423     if (I_IXOFF(tty)) {
1424         unsigned char start_char = START_CHAR(tty);
1425         status = edge_write(tty, port, &start_char, 1);
1426         if (status <= 0)
1427             return;
1428     }
1429     /* if we are implementing RTS/CTS, toggle that line */
1430     if (C_CRTSCTS(tty)) {
1431         edge_port->shadowMCR |= MCR_RTS;
1432         send_cmd_write_uart_register(edge_port, MCR,
1433                         edge_port->shadowMCR);
1434     }
1435 }
1436
1437
1438 /*****************************************************************************
1439  * SerialSetTermios
1440  *  this function is called by the tty driver when it wants to change
1441  * the termios structure
1442  *****************************************************************************/
1443 static void edge_set_termios(struct tty_struct *tty,
1444     struct usb_serial_port *port, struct ktermios *old_termios)
1445 {
1446     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1447
1448     if (edge_port == NULL)
1449         return;
1450
1451     if (!edge_port->open) {
1452         dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1453         return;
1454     }
1455
1456     /* change the port settings to the new ones specified */
1457     change_port_settings(tty, edge_port, old_termios);
1458 }
1459
1460
1461 /*****************************************************************************
1462  * get_lsr_info - get line status register info
1463  *
1464  * Purpose: Let user call ioctl() to get info when the UART physically
1465  *      is emptied.  On bus types like RS485, the transmitter must
1466  *      release the bus after transmitting. This must be done when
1467  *      the transmit shift register is empty, not be done when the
1468  *      transmit holding register is empty.  This functionality
1469  *      allows an RS485 driver to be written in user space.
1470  *****************************************************************************/
1471 static int get_lsr_info(struct edgeport_port *edge_port,
1472                         unsigned int __user *value)
1473 {
1474     unsigned int result = 0;
1475     unsigned long flags;
1476
1477     spin_lock_irqsave(&edge_port->ep_lock, flags);
1478     if (edge_port->maxTxCredits == edge_port->txCredits &&
1479         edge_port->txfifo.count == 0) {
1480         dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1481         result = TIOCSER_TEMT;
1482     }
1483     spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1484
1485     if (copy_to_user(value, &result, sizeof(int)))
1486         return -EFAULT;
1487     return 0;
1488 }
1489
1490 static int edge_tiocmset(struct tty_struct *tty,
1491                     unsigned int set, unsigned int clear)
1492 {
1493     struct usb_serial_port *port = tty->driver_data;
1494     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1495     unsigned int mcr;
1496
1497     mcr = edge_port->shadowMCR;
1498     if (set & TIOCM_RTS)
1499         mcr |= MCR_RTS;
1500     if (set & TIOCM_DTR)
1501         mcr |= MCR_DTR;
1502     if (set & TIOCM_LOOP)
1503         mcr |= MCR_LOOPBACK;
1504
1505     if (clear & TIOCM_RTS)
1506         mcr &= ~MCR_RTS;
1507     if (clear & TIOCM_DTR)
1508         mcr &= ~MCR_DTR;
1509     if (clear & TIOCM_LOOP)
1510         mcr &= ~MCR_LOOPBACK;
1511
1512     edge_port->shadowMCR = mcr;
1513
1514     send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1515
1516     return 0;
1517 }
1518
1519 static int edge_tiocmget(struct tty_struct *tty)
1520 {
1521     struct usb_serial_port *port = tty->driver_data;
1522     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1523     unsigned int result = 0;
1524     unsigned int msr;
1525     unsigned int mcr;
1526
1527     msr = edge_port->shadowMSR;
1528     mcr = edge_port->shadowMCR;
1529     result = ((mcr & MCR_DTR)   ? TIOCM_DTR: 0)   /* 0x002 */
1530           | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1531           | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1532           | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1533           | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1534           | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1535
1536     return result;
1537 }
1538
1539 /*****************************************************************************
1540  * SerialIoctl
1541  *  this function handles any ioctl calls to the driver
1542  *****************************************************************************/
1543 static int edge_ioctl(struct tty_struct *tty,
1544                     unsigned int cmd, unsigned long arg)
1545 {
1546     struct usb_serial_port *port = tty->driver_data;
1547     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1548
1549     switch (cmd) {
1550     case TIOCSERGETLSR:
1551         dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1552         return get_lsr_info(edge_port, (unsigned int __user *) arg);
1553     }
1554     return -ENOIOCTLCMD;
1555 }
1556
1557
1558 /*****************************************************************************
1559  * SerialBreak
1560  *  this function sends a break to the port
1561  *****************************************************************************/
1562 static void edge_break(struct tty_struct *tty, int break_state)
1563 {
1564     struct usb_serial_port *port = tty->driver_data;
1565     struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1566     struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1567     int status;
1568
1569     if (!edge_serial->is_epic ||
1570         edge_serial->epic_descriptor.Supports.IOSPChase) {
1571         /* flush and chase */
1572         edge_port->chaseResponsePending = true;
1573
1574         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1575         status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1576         if (status == 0) {
1577             /* block until chase finished */
1578             block_until_chase_response(edge_port);
1579         } else {
1580             edge_port->chaseResponsePending = false;
1581         }
1582     }
1583
1584     if (!edge_serial->is_epic ||
1585         edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1586         if (break_state == -1) {
1587             dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1588             status = send_iosp_ext_cmd(edge_port,
1589                         IOSP_CMD_SET_BREAK, 0);
1590         } else {
1591             dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1592             status = send_iosp_ext_cmd(edge_port,
1593                         IOSP_CMD_CLEAR_BREAK, 0);
1594         }
1595         if (status)
1596             dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1597                 __func__);
1598     }
1599 }
1600
1601
1602 /*****************************************************************************
1603  * process_rcvd_data
1604  *  this function handles the data received on the bulk in pipe.
1605  *****************************************************************************/
1606 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1607                 unsigned char *buffer, __u16 bufferLength)
1608 {
1609     struct usb_serial *serial = edge_serial->serial;
1610     struct device *dev = &serial->dev->dev;
1611     struct usb_serial_port *port;
1612     struct edgeport_port *edge_port;
1613     __u16 lastBufferLength;
1614     __u16 rxLen;
1615
1616     lastBufferLength = bufferLength + 1;
1617
1618     while (bufferLength > 0) {
1619         /* failsafe incase we get a message that we don't understand */
1620         if (lastBufferLength == bufferLength) {
1621             dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1622             break;
1623         }
1624         lastBufferLength = bufferLength;
1625
1626         switch (edge_serial->rxState) {
1627         case EXPECT_HDR1:
1628             edge_serial->rxHeader1 = *buffer;
1629             ++buffer;
1630             --bufferLength;
1631
1632             if (bufferLength == 0) {
1633                 edge_serial->rxState = EXPECT_HDR2;
1634                 break;
1635             }
1636             fallthrough;
1637         case EXPECT_HDR2:
1638             edge_serial->rxHeader2 = *buffer;
1639             ++buffer;
1640             --bufferLength;
1641
1642             dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1643                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1644             /* Process depending on whether this header is
1645              * data or status */
1646
1647             if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1648                 /* Decode this status header and go to
1649                  * EXPECT_HDR1 (if we can process the status
1650                  * with only 2 bytes), or go to EXPECT_HDR3 to
1651                  * get the third byte. */
1652                 edge_serial->rxPort =
1653                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1654                 edge_serial->rxStatusCode =
1655                     IOSP_GET_STATUS_CODE(
1656                         edge_serial->rxHeader1);
1657
1658                 if (!IOSP_STATUS_IS_2BYTE(
1659                         edge_serial->rxStatusCode)) {
1660                     /* This status needs additional bytes.
1661                      * Save what we have and then wait for
1662                      * more data.
1663                      */
1664                     edge_serial->rxStatusParam
1665                         = edge_serial->rxHeader2;
1666                     edge_serial->rxState = EXPECT_HDR3;
1667                     break;
1668                 }
1669                 /* We have all the header bytes, process the
1670                    status now */
1671                 process_rcvd_status(edge_serial,
1672                         edge_serial->rxHeader2, 0);
1673                 edge_serial->rxState = EXPECT_HDR1;
1674                 break;
1675             }
1676
1677             edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1678             edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1679                                           edge_serial->rxHeader2);
1680             dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1681                 edge_serial->rxPort,
1682                 edge_serial->rxBytesRemaining);
1683
1684             if (bufferLength == 0) {
1685                 edge_serial->rxState = EXPECT_DATA;
1686                 break;
1687             }
1688             fallthrough;
1689         case EXPECT_DATA: /* Expect data */
1690             if (bufferLength < edge_serial->rxBytesRemaining) {
1691                 rxLen = bufferLength;
1692                 /* Expect data to start next buffer */
1693                 edge_serial->rxState = EXPECT_DATA;
1694             } else {
1695                 /* BufLen >= RxBytesRemaining */
1696                 rxLen = edge_serial->rxBytesRemaining;
1697                 /* Start another header next time */
1698                 edge_serial->rxState = EXPECT_HDR1;
1699             }
1700
1701             bufferLength -= rxLen;
1702             edge_serial->rxBytesRemaining -= rxLen;
1703
1704             /* spit this data back into the tty driver if this
1705                port is open */
1706             if (rxLen && edge_serial->rxPort < serial->num_ports) {
1707                 port = serial->port[edge_serial->rxPort];
1708                 edge_port = usb_get_serial_port_data(port);
1709                 if (edge_port && edge_port->open) {
1710                     dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1711                         __func__, rxLen,
1712                         edge_serial->rxPort);
1713                     edge_tty_recv(edge_port->port, buffer,
1714                             rxLen);
1715                     edge_port->port->icount.rx += rxLen;
1716                 }
1717             }
1718             buffer += rxLen;
1719             break;
1720
1721         case EXPECT_HDR3:   /* Expect 3rd byte of status header */
1722             edge_serial->rxHeader3 = *buffer;
1723             ++buffer;
1724             --bufferLength;
1725
1726             /* We have all the header bytes, process the
1727                status now */
1728             process_rcvd_status(edge_serial,
1729                 edge_serial->rxStatusParam,
1730                 edge_serial->rxHeader3);
1731             edge_serial->rxState = EXPECT_HDR1;
1732             break;
1733         }
1734     }
1735 }
1736
1737
1738 /*****************************************************************************
1739  * process_rcvd_status
1740  *  this function handles the any status messages received on the
1741  *  bulk in pipe.
1742  *****************************************************************************/
1743 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1744                         __u8 byte2, __u8 byte3)
1745 {
1746     struct usb_serial_port *port;
1747     struct edgeport_port *edge_port;
1748     struct tty_struct *tty;
1749     struct device *dev;
1750     __u8 code = edge_serial->rxStatusCode;
1751
1752     /* switch the port pointer to the one being currently talked about */
1753     if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1754         return;
1755     port = edge_serial->serial->port[edge_serial->rxPort];
1756     edge_port = usb_get_serial_port_data(port);
1757     if (edge_port == NULL) {
1758         dev_err(&edge_serial->serial->dev->dev,
1759             "%s - edge_port == NULL for port %d\n",
1760                     __func__, edge_serial->rxPort);
1761         return;
1762     }
1763     dev = &port->dev;
1764
1765     if (code == IOSP_EXT_STATUS) {
1766         switch (byte2) {
1767         case IOSP_EXT_STATUS_CHASE_RSP:
1768             /* we want to do EXT status regardless of port
1769              * open/closed */
1770             dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1771                 __func__, edge_serial->rxPort, byte3);
1772             /* Currently, the only EXT_STATUS is Chase, so process
1773              * here instead of one more call to one more subroutine
1774              * If/when more EXT_STATUS, there'll be more work to do
1775              * Also, we currently clear flag and close the port
1776              * regardless of content of above's Byte3.
1777              * We could choose to do something else when Byte3 says
1778              * Timeout on Chase from Edgeport, like wait longer in
1779              * block_until_chase_response, but for now we don't.
1780              */
1781             edge_port->chaseResponsePending = false;
1782             wake_up(&edge_port->wait_chase);
1783             return;
1784
1785         case IOSP_EXT_STATUS_RX_CHECK_RSP:
1786             dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1787                 __func__, edge_serial->rxPort, byte3);
1788             /* Port->RxCheckRsp = true; */
1789             return;
1790         }
1791     }
1792
1793     if (code == IOSP_STATUS_OPEN_RSP) {
1794         edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1795         edge_port->maxTxCredits = edge_port->txCredits;
1796         dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1797             __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1798         handle_new_msr(edge_port, byte2);
1799
1800         /* send the current line settings to the port so we are
1801            in sync with any further termios calls */
1802         tty = tty_port_tty_get(&edge_port->port->port);
1803         if (tty) {
1804             change_port_settings(tty,
1805                 edge_port, &tty->termios);
1806             tty_kref_put(tty);
1807         }
1808
1809         /* we have completed the open */
1810         edge_port->openPending = false;
1811         edge_port->open = true;
1812         wake_up(&edge_port->wait_open);
1813         return;
1814     }
1815
1816     /* If port is closed, silently discard all rcvd status. We can
1817      * have cases where buffered status is received AFTER the close
1818      * port command is sent to the Edgeport.
1819      */
1820     if (!edge_port->open || edge_port->closePending)
1821         return;
1822
1823     switch (code) {
1824     /* Not currently sent by Edgeport */
1825     case IOSP_STATUS_LSR:
1826         dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1827             __func__, edge_serial->rxPort, byte2);
1828         handle_new_lsr(edge_port, false, byte2, 0);
1829         break;
1830
1831     case IOSP_STATUS_LSR_DATA:
1832         dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1833             __func__, edge_serial->rxPort, byte2, byte3);
1834         /* byte2 is LSR Register */
1835         /* byte3 is broken data byte */
1836         handle_new_lsr(edge_port, true, byte2, byte3);
1837         break;
1838     /*
1839      *  case IOSP_EXT_4_STATUS:
1840      *      dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1841      *          __func__, edge_serial->rxPort, byte2, byte3);
1842      *      break;
1843      */
1844     case IOSP_STATUS_MSR:
1845         dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1846             __func__, edge_serial->rxPort, byte2);
1847         /*
1848          * Process this new modem status and generate appropriate
1849          * events, etc, based on the new status. This routine
1850          * also saves the MSR in Port->ShadowMsr.
1851          */
1852         handle_new_msr(edge_port, byte2);
1853         break;
1854
1855     default:
1856         dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1857         break;
1858     }
1859 }
1860
1861
1862 /*****************************************************************************
1863  * edge_tty_recv
1864  *  this function passes data on to the tty flip buffer
1865  *****************************************************************************/
1866 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1867         int length)
1868 {
1869     int cnt;
1870
1871     cnt = tty_insert_flip_string(&port->port, data, length);
1872     if (cnt < length) {
1873         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1874                 __func__, length - cnt);
1875     }
1876     data += cnt;
1877     length -= cnt;
1878
1879     tty_flip_buffer_push(&port->port);
1880 }
1881
1882
1883 /*****************************************************************************
1884  * handle_new_msr
1885  *  this function handles any change to the msr register for a port.
1886  *****************************************************************************/
1887 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1888 {
1889     struct  async_icount *icount;
1890
1891     if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1892             EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1893         icount = &edge_port->port->icount;
1894
1895         /* update input line counters */
1896         if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1897             icount->cts++;
1898         if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1899             icount->dsr++;
1900         if (newMsr & EDGEPORT_MSR_DELTA_CD)
1901             icount->dcd++;
1902         if (newMsr & EDGEPORT_MSR_DELTA_RI)
1903             icount->rng++;
1904         wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1905     }
1906
1907     /* Save the new modem status */
1908     edge_port->shadowMSR = newMsr & 0xf0;
1909 }
1910
1911
1912 /*****************************************************************************
1913  * handle_new_lsr
1914  *  this function handles any change to the lsr register for a port.
1915  *****************************************************************************/
1916 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1917                             __u8 lsr, __u8 data)
1918 {
1919     __u8 newLsr = (__u8) (lsr & (__u8)
1920         (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1921     struct async_icount *icount;
1922
1923     edge_port->shadowLSR = lsr;
1924
1925     if (newLsr & LSR_BREAK) {
1926         /*
1927          * Parity and Framing errors only count if they
1928          * occur exclusive of a break being
1929          * received.
1930          */
1931         newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1932     }
1933
1934     /* Place LSR data byte into Rx buffer */
1935     if (lsrData)
1936         edge_tty_recv(edge_port->port, &data, 1);
1937
1938     /* update input line counters */
1939     icount = &edge_port->port->icount;
1940     if (newLsr & LSR_BREAK)
1941         icount->brk++;
1942     if (newLsr & LSR_OVER_ERR)
1943         icount->overrun++;
1944     if (newLsr & LSR_PAR_ERR)
1945         icount->parity++;
1946     if (newLsr & LSR_FRM_ERR)
1947         icount->frame++;
1948 }
1949
1950
1951 /****************************************************************************
1952  * sram_write
1953  *  writes a number of bytes to the Edgeport device's sram starting at the
1954  *  given address.
1955  *  If successful returns the number of bytes written, otherwise it returns
1956  *  a negative error number of the problem.
1957  ****************************************************************************/
1958 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
1959                     __u16 length, const __u8 *data)
1960 {
1961     int result;
1962     __u16 current_length;
1963     unsigned char *transfer_buffer;
1964
1965     dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
1966
1967     transfer_buffer =  kmalloc(64, GFP_KERNEL);
1968     if (!transfer_buffer)
1969         return -ENOMEM;
1970
1971     /* need to split these writes up into 64 byte chunks */
1972     result = 0;
1973     while (length > 0) {
1974         if (length > 64)
1975             current_length = 64;
1976         else
1977             current_length = length;
1978
1979 /*      dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
1980         memcpy(transfer_buffer, data, current_length);
1981         result = usb_control_msg(serial->dev,
1982                     usb_sndctrlpipe(serial->dev, 0),
1983                     USB_REQUEST_ION_WRITE_RAM,
1984                     0x40, addr, extAddr, transfer_buffer,
1985                     current_length, 300);
1986         if (result < 0)
1987             break;
1988         length -= current_length;
1989         addr += current_length;
1990         data += current_length;
1991     }
1992
1993     kfree(transfer_buffer);
1994     return result;
1995 }
1996
1997
1998 /****************************************************************************
1999  * rom_write
2000  *  writes a number of bytes to the Edgeport device's ROM starting at the
2001  *  given address.
2002  *  If successful returns the number of bytes written, otherwise it returns
2003  *  a negative error number of the problem.
2004  ****************************************************************************/
2005 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2006                     __u16 length, const __u8 *data)
2007 {
2008     int result;
2009     __u16 current_length;
2010     unsigned char *transfer_buffer;
2011
2012     transfer_buffer =  kmalloc(64, GFP_KERNEL);
2013     if (!transfer_buffer)
2014         return -ENOMEM;
2015
2016     /* need to split these writes up into 64 byte chunks */
2017     result = 0;
2018     while (length > 0) {
2019         if (length > 64)
2020             current_length = 64;
2021         else
2022             current_length = length;
2023         memcpy(transfer_buffer, data, current_length);
2024         result = usb_control_msg(serial->dev,
2025                     usb_sndctrlpipe(serial->dev, 0),
2026                     USB_REQUEST_ION_WRITE_ROM, 0x40,
2027                     addr, extAddr,
2028                     transfer_buffer, current_length, 300);
2029         if (result < 0)
2030             break;
2031         length -= current_length;
2032         addr += current_length;
2033         data += current_length;
2034     }
2035
2036     kfree(transfer_buffer);
2037     return result;
2038 }
2039
2040
2041 /****************************************************************************
2042  * rom_read
2043  *  reads a number of bytes from the Edgeport device starting at the given
2044  *  address.
2045  *  Returns zero on success or a negative error number.
2046  ****************************************************************************/
2047 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2048                     __u16 addr, __u16 length, __u8 *data)
2049 {
2050     int result;
2051     __u16 current_length;
2052     unsigned char *transfer_buffer;
2053
2054     transfer_buffer =  kmalloc(64, GFP_KERNEL);
2055     if (!transfer_buffer)
2056         return -ENOMEM;
2057
2058     /* need to split these reads up into 64 byte chunks */
2059     result = 0;
2060     while (length > 0) {
2061         if (length > 64)
2062             current_length = 64;
2063         else
2064             current_length = length;
2065         result = usb_control_msg(serial->dev,
2066                     usb_rcvctrlpipe(serial->dev, 0),
2067                     USB_REQUEST_ION_READ_ROM,
2068                     0xC0, addr, extAddr, transfer_buffer,
2069                     current_length, 300);
2070         if (result < current_length) {
2071             if (result >= 0)
2072                 result = -EIO;
2073             break;
2074         }
2075         memcpy(data, transfer_buffer, current_length);
2076         length -= current_length;
2077         addr += current_length;
2078         data += current_length;
2079
2080         result = 0;
2081     }
2082
2083     kfree(transfer_buffer);
2084     return result;
2085 }
2086
2087
2088 /****************************************************************************
2089  * send_iosp_ext_cmd
2090  *  Is used to send a IOSP message to the Edgeport device
2091  ****************************************************************************/
2092 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2093                         __u8 command, __u8 param)
2094 {
2095     unsigned char   *buffer;
2096     unsigned char   *currentCommand;
2097     int             length = 0;
2098     int             status = 0;
2099
2100     buffer = kmalloc(10, GFP_ATOMIC);
2101     if (!buffer)
2102         return -ENOMEM;
2103
2104     currentCommand = buffer;
2105
2106     MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2107              command, param);
2108
2109     status = write_cmd_usb(edge_port, buffer, length);
2110     if (status) {
2111         /* something bad happened, let's free up the memory */
2112         kfree(buffer);
2113     }
2114
2115     return status;
2116 }
2117
2118
2119 /*****************************************************************************
2120  * write_cmd_usb
2121  *  this function writes the given buffer out to the bulk write endpoint.
2122  *****************************************************************************/
2123 static int write_cmd_usb(struct edgeport_port *edge_port,
2124                     unsigned char *buffer, int length)
2125 {
2126     struct edgeport_serial *edge_serial =
2127                 usb_get_serial_data(edge_port->port->serial);
2128     struct device *dev = &edge_port->port->dev;
2129     int status = 0;
2130     struct urb *urb;
2131
2132     usb_serial_debug_data(dev, __func__, length, buffer);
2133
2134     /* Allocate our next urb */
2135     urb = usb_alloc_urb(0, GFP_ATOMIC);
2136     if (!urb)
2137         return -ENOMEM;
2138
2139     atomic_inc(&CmdUrbs);
2140     dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2141         __func__, urb, atomic_read(&CmdUrbs));
2142
2143     usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2144             usb_sndbulkpipe(edge_serial->serial->dev,
2145                     edge_serial->bulk_out_endpoint),
2146             buffer, length, edge_bulk_out_cmd_callback, edge_port);
2147
2148     edge_port->commandPending = true;
2149     status = usb_submit_urb(urb, GFP_ATOMIC);
2150
2151     if (status) {
2152         /* something went wrong */
2153         dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2154             __func__, status);
2155         usb_free_urb(urb);
2156         atomic_dec(&CmdUrbs);
2157         return status;
2158     }
2159
2160 #if 0
2161     wait_event(&edge_port->wait_command, !edge_port->commandPending);
2162
2163     if (edge_port->commandPending) {
2164         /* command timed out */
2165         dev_dbg(dev, "%s - command timed out\n", __func__);
2166         status = -EINVAL;
2167     }
2168 #endif
2169     return status;
2170 }
2171
2172
2173 /*****************************************************************************
2174  * send_cmd_write_baud_rate
2175  *  this function sends the proper command to change the baud rate of the
2176  *  specified port.
2177  *****************************************************************************/
2178 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2179                                 int baudRate)
2180 {
2181     struct edgeport_serial *edge_serial =
2182                 usb_get_serial_data(edge_port->port->serial);
2183     struct device *dev = &edge_port->port->dev;
2184     unsigned char *cmdBuffer;
2185     unsigned char *currCmd;
2186     int cmdLen = 0;
2187     int divisor;
2188     int status;
2189     u32 number = edge_port->port->port_number;
2190
2191     if (edge_serial->is_epic &&
2192         !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2193         dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2194             baudRate);
2195         return 0;
2196     }
2197
2198     dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2199
2200     status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2201     if (status) {
2202         dev_err(dev, "%s - bad baud rate\n", __func__);
2203         return status;
2204     }
2205
2206     /* Alloc memory for the string of commands. */
2207     cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2208     if (!cmdBuffer)
2209         return -ENOMEM;
2210
2211     currCmd = cmdBuffer;
2212
2213     /* Enable access to divisor latch */
2214     MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2215
2216     /* Write the divisor itself */
2217     MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2218     MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2219
2220     /* Restore original value to disable access to divisor latch */
2221     MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2222                         edge_port->shadowLCR);
2223
2224     status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2225     if (status) {
2226         /* something bad happened, let's free up the memory */
2227         kfree(cmdBuffer);
2228     }
2229
2230     return status;
2231 }
2232
2233
2234 /*****************************************************************************
2235  * calc_baud_rate_divisor
2236  *  this function calculates the proper baud rate divisor for the specified
2237  *  baud rate.
2238  *****************************************************************************/
2239 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2240 {
2241     int i;
2242     __u16 custom;
2243
2244     for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2245         if (divisor_table[i].BaudRate == baudrate) {
2246             *divisor = divisor_table[i].Divisor;
2247             return 0;
2248         }
2249     }
2250
2251     /* We have tried all of the standard baud rates
2252      * lets try to calculate the divisor for this baud rate
2253      * Make sure the baud rate is reasonable */
2254     if (baudrate > 50 && baudrate < 230400) {
2255         /* get divisor */
2256         custom = (__u16)((230400L + baudrate/2) / baudrate);
2257
2258         *divisor = custom;
2259
2260         dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2261         return 0;
2262     }
2263
2264     return -1;
2265 }
2266
2267
2268 /*****************************************************************************
2269  * send_cmd_write_uart_register
2270  *  this function builds up a uart register message and sends to the device.
2271  *****************************************************************************/
2272 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2273                         __u8 regNum, __u8 regValue)
2274 {
2275     struct edgeport_serial *edge_serial =
2276                 usb_get_serial_data(edge_port->port->serial);
2277     struct device *dev = &edge_port->port->dev;
2278     unsigned char *cmdBuffer;
2279     unsigned char *currCmd;
2280     unsigned long cmdLen = 0;
2281     int status;
2282
2283     dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2284         (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2285
2286     if (edge_serial->is_epic &&
2287         !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2288         regNum == MCR) {
2289         dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2290         return 0;
2291     }
2292
2293     if (edge_serial->is_epic &&
2294         !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2295         regNum == LCR) {
2296         dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2297         return 0;
2298     }
2299
2300     /* Alloc memory for the string of commands. */
2301     cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2302     if (cmdBuffer == NULL)
2303         return -ENOMEM;
2304
2305     currCmd = cmdBuffer;
2306
2307     /* Build a cmd in the buffer to write the given register */
2308     MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2309                regNum, regValue);
2310
2311     status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2312     if (status) {
2313         /* something bad happened, let's free up the memory */
2314         kfree(cmdBuffer);
2315     }
2316
2317     return status;
2318 }
2319
2320
2321 /*****************************************************************************
2322  * change_port_settings
2323  *  This routine is called to set the UART on the device to match the
2324  *  specified new settings.
2325  *****************************************************************************/
2326
2327 static void change_port_settings(struct tty_struct *tty,
2328     struct edgeport_port *edge_port, struct ktermios *old_termios)
2329 {
2330     struct device *dev = &edge_port->port->dev;
2331     struct edgeport_serial *edge_serial =
2332             usb_get_serial_data(edge_port->port->serial);
2333     int baud;
2334     unsigned cflag;
2335     __u8 mask = 0xff;
2336     __u8 lData;
2337     __u8 lParity;
2338     __u8 lStop;
2339     __u8 rxFlow;
2340     __u8 txFlow;
2341     int status;
2342
2343     if (!edge_port->open &&
2344         !edge_port->openPending) {
2345         dev_dbg(dev, "%s - port not opened\n", __func__);
2346         return;
2347     }
2348
2349     cflag = tty->termios.c_cflag;
2350
2351     switch (cflag & CSIZE) {
2352     case CS5:
2353         lData = LCR_BITS_5; mask = 0x1f;
2354         dev_dbg(dev, "%s - data bits = 5\n", __func__);
2355         break;
2356     case CS6:
2357         lData = LCR_BITS_6; mask = 0x3f;
2358         dev_dbg(dev, "%s - data bits = 6\n", __func__);
2359         break;
2360     case CS7:
2361         lData = LCR_BITS_7; mask = 0x7f;
2362         dev_dbg(dev, "%s - data bits = 7\n", __func__);
2363         break;
2364     default:
2365     case CS8:
2366         lData = LCR_BITS_8;
2367         dev_dbg(dev, "%s - data bits = 8\n", __func__);
2368         break;
2369     }
2370
2371     lParity = LCR_PAR_NONE;
2372     if (cflag & PARENB) {
2373         if (cflag & CMSPAR) {
2374             if (cflag & PARODD) {
2375                 lParity = LCR_PAR_MARK;
2376                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2377             } else {
2378                 lParity = LCR_PAR_SPACE;
2379                 dev_dbg(dev, "%s - parity = space\n", __func__);
2380             }
2381         } else if (cflag & PARODD) {
2382             lParity = LCR_PAR_ODD;
2383             dev_dbg(dev, "%s - parity = odd\n", __func__);
2384         } else {
2385             lParity = LCR_PAR_EVEN;
2386             dev_dbg(dev, "%s - parity = even\n", __func__);
2387         }
2388     } else {
2389         dev_dbg(dev, "%s - parity = none\n", __func__);
2390     }
2391
2392     if (cflag & CSTOPB) {
2393         lStop = LCR_STOP_2;
2394         dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2395     } else {
2396         lStop = LCR_STOP_1;
2397         dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2398     }
2399
2400     /* figure out the flow control settings */
2401     rxFlow = txFlow = 0x00;
2402     if (cflag & CRTSCTS) {
2403         rxFlow |= IOSP_RX_FLOW_RTS;
2404         txFlow |= IOSP_TX_FLOW_CTS;
2405         dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2406     } else {
2407         dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2408     }
2409
2410     /* if we are implementing XON/XOFF, set the start and stop character
2411        in the device */
2412     if (I_IXOFF(tty) || I_IXON(tty)) {
2413         unsigned char stop_char  = STOP_CHAR(tty);
2414         unsigned char start_char = START_CHAR(tty);
2415
2416         if (!edge_serial->is_epic ||
2417             edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2418             send_iosp_ext_cmd(edge_port,
2419                     IOSP_CMD_SET_XON_CHAR, start_char);
2420             send_iosp_ext_cmd(edge_port,
2421                     IOSP_CMD_SET_XOFF_CHAR, stop_char);
2422         }
2423
2424         /* if we are implementing INBOUND XON/XOFF */
2425         if (I_IXOFF(tty)) {
2426             rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2427             dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2428                 __func__, start_char, stop_char);
2429         } else {
2430             dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2431         }
2432
2433         /* if we are implementing OUTBOUND XON/XOFF */
2434         if (I_IXON(tty)) {
2435             txFlow |= IOSP_TX_FLOW_XON_XOFF;
2436             dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2437                 __func__, start_char, stop_char);
2438         } else {
2439             dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2440         }
2441     }
2442
2443     /* Set flow control to the configured value */
2444     if (!edge_serial->is_epic ||
2445         edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2446         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2447     if (!edge_serial->is_epic ||
2448         edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2449         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2450
2451
2452     edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2453     edge_port->shadowLCR |= (lData | lParity | lStop);
2454
2455     edge_port->validDataMask = mask;
2456
2457     /* Send the updated LCR value to the EdgePort */
2458     status = send_cmd_write_uart_register(edge_port, LCR,
2459                             edge_port->shadowLCR);
2460     if (status != 0)
2461         return;
2462
2463     /* set up the MCR register and send it to the EdgePort */
2464     edge_port->shadowMCR = MCR_MASTER_IE;
2465     if (cflag & CBAUD)
2466         edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2467
2468     status = send_cmd_write_uart_register(edge_port, MCR,
2469                         edge_port->shadowMCR);
2470     if (status != 0)
2471         return;
2472
2473     /* Determine divisor based on baud rate */
2474     baud = tty_get_baud_rate(tty);
2475     if (!baud) {
2476         /* pick a default, any default... */
2477         baud = 9600;
2478     }
2479
2480     dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2481     status = send_cmd_write_baud_rate(edge_port, baud);
2482     if (status == -1) {
2483         /* Speed change was not possible - put back the old speed */
2484         baud = tty_termios_baud_rate(old_termios);
2485         tty_encode_baud_rate(tty, baud, baud);
2486     }
2487 }
2488
2489
2490 /****************************************************************************
2491  * unicode_to_ascii
2492  *  Turns a string from Unicode into ASCII.
2493  *  Doesn't do a good job with any characters that are outside the normal
2494  *  ASCII range, but it's only for debugging...
2495  *  NOTE: expects the unicode in LE format
2496  ****************************************************************************/
2497 static void unicode_to_ascii(char *string, int buflen,
2498                     __le16 *unicode, int unicode_size)
2499 {
2500     int i;
2501
2502     if (buflen <= 0)    /* never happens, but... */
2503         return;
2504     --buflen;       /* space for nul */
2505
2506     for (i = 0; i < unicode_size; i++) {
2507         if (i >= buflen)
2508             break;
2509         string[i] = (char)(le16_to_cpu(unicode[i]));
2510     }
2511     string[i] = 0x00;
2512 }
2513
2514
2515 /****************************************************************************
2516  * get_manufacturing_desc
2517  *  reads in the manufacturing descriptor and stores it into the serial
2518  *  structure.
2519  ****************************************************************************/
2520 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2521 {
2522     struct device *dev = &edge_serial->serial->dev->dev;
2523     int response;
2524
2525     dev_dbg(dev, "getting manufacturer descriptor\n");
2526
2527     response = rom_read(edge_serial->serial,
2528                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2529                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2530                 EDGE_MANUF_DESC_LEN,
2531                 (__u8 *)(&edge_serial->manuf_descriptor));
2532
2533     if (response < 0) {
2534         dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2535                 response);
2536     } else {
2537         char string[30];
2538         dev_dbg(dev, "**Manufacturer Descriptor\n");
2539         dev_dbg(dev, "  RomSize:        %dK\n",
2540             edge_serial->manuf_descriptor.RomSize);
2541         dev_dbg(dev, "  RamSize:        %dK\n",
2542             edge_serial->manuf_descriptor.RamSize);
2543         dev_dbg(dev, "  CpuRev:         %d\n",
2544             edge_serial->manuf_descriptor.CpuRev);
2545         dev_dbg(dev, "  BoardRev:       %d\n",
2546             edge_serial->manuf_descriptor.BoardRev);
2547         dev_dbg(dev, "  NumPorts:       %d\n",
2548             edge_serial->manuf_descriptor.NumPorts);
2549         dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2550             edge_serial->manuf_descriptor.DescDate[0],
2551             edge_serial->manuf_descriptor.DescDate[1],
2552             edge_serial->manuf_descriptor.DescDate[2]+1900);
2553         unicode_to_ascii(string, sizeof(string),
2554             edge_serial->manuf_descriptor.SerialNumber,
2555             edge_serial->manuf_descriptor.SerNumLength/2);
2556         dev_dbg(dev, "  SerialNumber: %s\n", string);
2557         unicode_to_ascii(string, sizeof(string),
2558             edge_serial->manuf_descriptor.AssemblyNumber,
2559             edge_serial->manuf_descriptor.AssemblyNumLength/2);
2560         dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2561         unicode_to_ascii(string, sizeof(string),
2562             edge_serial->manuf_descriptor.OemAssyNumber,
2563             edge_serial->manuf_descriptor.OemAssyNumLength/2);
2564         dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2565         dev_dbg(dev, "  UartType:       %d\n",
2566             edge_serial->manuf_descriptor.UartType);
2567         dev_dbg(dev, "  IonPid:         %d\n",
2568             edge_serial->manuf_descriptor.IonPid);
2569         dev_dbg(dev, "  IonConfig:      %d\n",
2570             edge_serial->manuf_descriptor.IonConfig);
2571     }
2572 }
2573
2574
2575 /****************************************************************************
2576  * get_boot_desc
2577  *  reads in the bootloader descriptor and stores it into the serial
2578  *  structure.
2579  ****************************************************************************/
2580 static void get_boot_desc(struct edgeport_serial *edge_serial)
2581 {
2582     struct device *dev = &edge_serial->serial->dev->dev;
2583     int response;
2584
2585     dev_dbg(dev, "getting boot descriptor\n");
2586
2587     response = rom_read(edge_serial->serial,
2588                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2589                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2590                 EDGE_BOOT_DESC_LEN,
2591                 (__u8 *)(&edge_serial->boot_descriptor));
2592
2593     if (response < 0) {
2594         dev_err(dev, "error in getting boot descriptor: %d\n",
2595                 response);
2596     } else {
2597         dev_dbg(dev, "**Boot Descriptor:\n");
2598         dev_dbg(dev, "  BootCodeLength: %d\n",
2599             le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2600         dev_dbg(dev, "  MajorVersion:   %d\n",
2601             edge_serial->boot_descriptor.MajorVersion);
2602         dev_dbg(dev, "  MinorVersion:   %d\n",
2603             edge_serial->boot_descriptor.MinorVersion);
2604         dev_dbg(dev, "  BuildNumber:    %d\n",
2605             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2606         dev_dbg(dev, "  Capabilities:   0x%x\n",
2607               le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2608         dev_dbg(dev, "  UConfig0:       %d\n",
2609             edge_serial->boot_descriptor.UConfig0);
2610         dev_dbg(dev, "  UConfig1:       %d\n",
2611             edge_serial->boot_descriptor.UConfig1);
2612     }
2613 }
2614
2615
2616 /****************************************************************************
2617  * load_application_firmware
2618  *  This is called to load the application firmware to the device
2619  ****************************************************************************/
2620 static void load_application_firmware(struct edgeport_serial *edge_serial)
2621 {
2622     struct device *dev = &edge_serial->serial->dev->dev;
2623     const struct ihex_binrec *rec;
2624     const struct firmware *fw;
2625     const char *fw_name;
2626     const char *fw_info;
2627     int response;
2628     __u32 Operaddr;
2629     __u16 build;
2630
2631     switch (edge_serial->product_info.iDownloadFile) {
2632         case EDGE_DOWNLOAD_FILE_I930:
2633             fw_info = "downloading firmware version (930)";
2634             fw_name = "edgeport/down.fw";
2635             break;
2636
2637         case EDGE_DOWNLOAD_FILE_80251:
2638             fw_info = "downloading firmware version (80251)";
2639             fw_name = "edgeport/down2.fw";
2640             break;
2641
2642         case EDGE_DOWNLOAD_FILE_NONE:
2643             dev_dbg(dev, "No download file specified, skipping download\n");
2644             return;
2645
2646         default:
2647             return;
2648     }
2649
2650     response = request_ihex_firmware(&fw, fw_name,
2651                     &edge_serial->serial->dev->dev);
2652     if (response) {
2653         dev_err(dev, "Failed to load image \"%s\" err %d\n",
2654                fw_name, response);
2655         return;
2656     }
2657
2658     rec = (const struct ihex_binrec *)fw->data;
2659     build = (rec->data[2] << 8) | rec->data[3];
2660
2661     dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2662
2663     edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2664     edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2665     edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2666
2667     for (rec = ihex_next_binrec(rec); rec;
2668          rec = ihex_next_binrec(rec)) {
2669         Operaddr = be32_to_cpu(rec->addr);
2670         response = sram_write(edge_serial->serial,
2671                      Operaddr >> 16,
2672                      Operaddr & 0xFFFF,
2673                      be16_to_cpu(rec->len),
2674                      &rec->data[0]);
2675         if (response < 0) {
2676             dev_err(&edge_serial->serial->dev->dev,
2677                 "sram_write failed (%x, %x, %d)\n",
2678                 Operaddr >> 16, Operaddr & 0xFFFF,
2679                 be16_to_cpu(rec->len));
2680             break;
2681         }
2682     }
2683
2684     dev_dbg(dev, "sending exec_dl_code\n");
2685     response = usb_control_msg (edge_serial->serial->dev,
2686                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2687                     USB_REQUEST_ION_EXEC_DL_CODE,
2688                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2689
2690     release_firmware(fw);
2691 }
2692
2693
2694 /****************************************************************************
2695  * edge_startup
2696  ****************************************************************************/
2697 static int edge_startup(struct usb_serial *serial)
2698 {
2699     struct edgeport_serial *edge_serial;
2700     struct usb_device *dev;
2701     struct device *ddev = &serial->dev->dev;
2702     int i;
2703     int response;
2704     bool interrupt_in_found;
2705     bool bulk_in_found;
2706     bool bulk_out_found;
2707     static const __u32 descriptor[3] = {    EDGE_COMPATIBILITY_MASK0,
2708                         EDGE_COMPATIBILITY_MASK1,
2709                         EDGE_COMPATIBILITY_MASK2 };
2710
2711     dev = serial->dev;
2712
2713     /* create our private serial structure */
2714     edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2715     if (!edge_serial)
2716         return -ENOMEM;
2717
2718     spin_lock_init(&edge_serial->es_lock);
2719     edge_serial->serial = serial;
2720     usb_set_serial_data(serial, edge_serial);
2721
2722     /* get the name for the device from the device */
2723     i = usb_string(dev, dev->descriptor.iManufacturer,
2724         &edge_serial->name[0], MAX_NAME_LEN+1);
2725     if (i < 0)
2726         i = 0;
2727     edge_serial->name[i++] = ' ';
2728     usb_string(dev, dev->descriptor.iProduct,
2729         &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2730
2731     dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2732
2733     /* Read the epic descriptor */
2734     if (get_epic_descriptor(edge_serial) < 0) {
2735         /* memcpy descriptor to Supports structures */
2736         memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2737                sizeof(struct edge_compatibility_bits));
2738
2739         /* get the manufacturing descriptor for this device */
2740         get_manufacturing_desc(edge_serial);
2741
2742         /* get the boot descriptor */
2743         get_boot_desc(edge_serial);
2744
2745         get_product_info(edge_serial);
2746     }
2747
2748     /* set the number of ports from the manufacturing description */
2749     /* serial->num_ports = serial->product_info.NumPorts; */
2750     if ((!edge_serial->is_epic) &&
2751         (edge_serial->product_info.NumPorts != serial->num_ports)) {
2752         dev_warn(ddev,
2753             "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2754              edge_serial->product_info.NumPorts,
2755              serial->num_ports);
2756     }
2757
2758     dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2759
2760     /* If not an EPiC device */
2761     if (!edge_serial->is_epic) {
2762         /* now load the application firmware into this device */
2763         load_application_firmware(edge_serial);
2764
2765         dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2766
2767         /* Check current Edgeport EEPROM and update if necessary */
2768         update_edgeport_E2PROM(edge_serial);
2769
2770         dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2771
2772         /* set the configuration to use #1 */
2773 /*      dev_dbg(ddev, "set_configuration 1\n"); */
2774 /*      usb_set_configuration (dev, 1); */
2775     }
2776     dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2777         edge_serial->product_info.FirmwareMajorVersion,
2778         edge_serial->product_info.FirmwareMinorVersion,
2779         le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2780
2781     /* we set up the pointers to the endpoints in the edge_open function,
2782      * as the structures aren't created yet. */
2783
2784     response = 0;
2785
2786     if (edge_serial->is_epic) {
2787         struct usb_host_interface *alt;
2788
2789         alt = serial->interface->cur_altsetting;
2790
2791         /* EPIC thing, set up our interrupt polling now and our read
2792          * urb, so that the device knows it really is connected. */
2793         interrupt_in_found = bulk_in_found = bulk_out_found = false;
2794         for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2795             struct usb_endpoint_descriptor *endpoint;
2796             int buffer_size;
2797
2798             endpoint = &alt->endpoint[i].desc;
2799             buffer_size = usb_endpoint_maxp(endpoint);
2800             if (!interrupt_in_found &&
2801                 (usb_endpoint_is_int_in(endpoint))) {
2802                 /* we found a interrupt in endpoint */
2803                 dev_dbg(ddev, "found interrupt in\n");
2804
2805                 /* not set up yet, so do it now */
2806                 edge_serial->interrupt_read_urb =
2807                         usb_alloc_urb(0, GFP_KERNEL);
2808                 if (!edge_serial->interrupt_read_urb) {
2809                     response = -ENOMEM;
2810                     break;
2811                 }
2812
2813                 edge_serial->interrupt_in_buffer =
2814                     kmalloc(buffer_size, GFP_KERNEL);
2815                 if (!edge_serial->interrupt_in_buffer) {
2816                     response = -ENOMEM;
2817                     break;
2818                 }
2819                 edge_serial->interrupt_in_endpoint =
2820                         endpoint->bEndpointAddress;
2821
2822                 /* set up our interrupt urb */
2823                 usb_fill_int_urb(
2824                     edge_serial->interrupt_read_urb,
2825                     dev,
2826                     usb_rcvintpipe(dev,
2827                         endpoint->bEndpointAddress),
2828                     edge_serial->interrupt_in_buffer,
2829                     buffer_size,
2830                     edge_interrupt_callback,
2831                     edge_serial,
2832                     endpoint->bInterval);
2833
2834                 interrupt_in_found = true;
2835             }
2836
2837             if (!bulk_in_found &&
2838                 (usb_endpoint_is_bulk_in(endpoint))) {
2839                 /* we found a bulk in endpoint */
2840                 dev_dbg(ddev, "found bulk in\n");
2841
2842                 /* not set up yet, so do it now */
2843                 edge_serial->read_urb =
2844                         usb_alloc_urb(0, GFP_KERNEL);
2845                 if (!edge_serial->read_urb) {
2846                     response = -ENOMEM;
2847                     break;
2848                 }
2849
2850                 edge_serial->bulk_in_buffer =
2851                     kmalloc(buffer_size, GFP_KERNEL);
2852                 if (!edge_serial->bulk_in_buffer) {
2853                     response = -ENOMEM;
2854                     break;
2855                 }
2856                 edge_serial->bulk_in_endpoint =
2857                         endpoint->bEndpointAddress;
2858
2859                 /* set up our bulk in urb */
2860                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2861                     usb_rcvbulkpipe(dev,
2862                         endpoint->bEndpointAddress),
2863                     edge_serial->bulk_in_buffer,
2864                     usb_endpoint_maxp(endpoint),
2865                     edge_bulk_in_callback,
2866                     edge_serial);
2867                 bulk_in_found = true;
2868             }
2869
2870             if (!bulk_out_found &&
2871                 (usb_endpoint_is_bulk_out(endpoint))) {
2872                 /* we found a bulk out endpoint */
2873                 dev_dbg(ddev, "found bulk out\n");
2874                 edge_serial->bulk_out_endpoint =
2875                         endpoint->bEndpointAddress;
2876                 bulk_out_found = true;
2877             }
2878         }
2879
2880         if (response || !interrupt_in_found || !bulk_in_found ||
2881                             !bulk_out_found) {
2882             if (!response) {
2883                 dev_err(ddev, "expected endpoints not found\n");
2884                 response = -ENODEV;
2885             }
2886
2887             goto error;
2888         }
2889
2890         /* start interrupt read for this edgeport this interrupt will
2891          * continue as long as the edgeport is connected */
2892         response = usb_submit_urb(edge_serial->interrupt_read_urb,
2893                                 GFP_KERNEL);
2894         if (response) {
2895             dev_err(ddev, "%s - Error %d submitting control urb\n",
2896                 __func__, response);
2897
2898             goto error;
2899         }
2900     }
2901     return response;
2902
2903 error:
2904     usb_free_urb(edge_serial->interrupt_read_urb);
2905     kfree(edge_serial->interrupt_in_buffer);
2906
2907     usb_free_urb(edge_serial->read_urb);
2908     kfree(edge_serial->bulk_in_buffer);
2909
2910     kfree(edge_serial);
2911
2912     return response;
2913 }
2914
2915
2916 /****************************************************************************
2917  * edge_disconnect
2918  *  This function is called whenever the device is removed from the usb bus.
2919  ****************************************************************************/
2920 static void edge_disconnect(struct usb_serial *serial)
2921 {
2922     struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2923
2924     if (edge_serial->is_epic) {
2925         usb_kill_urb(edge_serial->interrupt_read_urb);
2926         usb_kill_urb(edge_serial->read_urb);
2927     }
2928 }
2929
2930
2931 /****************************************************************************
2932  * edge_release
2933  *  This function is called when the device structure is deallocated.
2934  ****************************************************************************/
2935 static void edge_release(struct usb_serial *serial)
2936 {
2937     struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2938
2939     if (edge_serial->is_epic) {
2940         usb_kill_urb(edge_serial->interrupt_read_urb);
2941         usb_free_urb(edge_serial->interrupt_read_urb);
2942         kfree(edge_serial->interrupt_in_buffer);
2943
2944         usb_kill_urb(edge_serial->read_urb);
2945         usb_free_urb(edge_serial->read_urb);
2946         kfree(edge_serial->bulk_in_buffer);
2947     }
2948
2949     kfree(edge_serial);
2950 }
2951
2952 static int edge_port_probe(struct usb_serial_port *port)
2953 {
2954     struct edgeport_port *edge_port;
2955
2956     edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2957     if (!edge_port)
2958         return -ENOMEM;
2959
2960     spin_lock_init(&edge_port->ep_lock);
2961     edge_port->port = port;
2962
2963     usb_set_serial_port_data(port, edge_port);
2964
2965     return 0;
2966 }
2967
2968 static void edge_port_remove(struct usb_serial_port *port)
2969 {
2970     struct edgeport_port *edge_port;
2971
2972     edge_port = usb_get_serial_port_data(port);
2973     kfree(edge_port);
2974 }
2975
2976 static struct usb_serial_driver edgeport_2port_device = {
2977     .driver = {
2978         .owner      = THIS_MODULE,
2979         .name       = "edgeport_2",
2980     },
2981     .description        = "Edgeport 2 port adapter",
2982     .id_table       = edgeport_2port_id_table,
2983     .num_ports      = 2,
2984     .num_bulk_in        = 1,
2985     .num_bulk_out       = 1,
2986     .num_interrupt_in   = 1,
2987     .open           = edge_open,
2988     .close          = edge_close,
2989     .throttle       = edge_throttle,
2990     .unthrottle     = edge_unthrottle,
2991     .attach         = edge_startup,
2992     .disconnect     = edge_disconnect,
2993     .release        = edge_release,
2994     .port_probe     = edge_port_probe,
2995     .port_remove        = edge_port_remove,
2996     .ioctl          = edge_ioctl,
2997     .set_termios        = edge_set_termios,
2998     .tiocmget       = edge_tiocmget,
2999     .tiocmset       = edge_tiocmset,
3000     .tiocmiwait     = usb_serial_generic_tiocmiwait,
3001     .get_icount     = usb_serial_generic_get_icount,
3002     .write          = edge_write,
3003     .write_room     = edge_write_room,
3004     .chars_in_buffer    = edge_chars_in_buffer,
3005     .break_ctl      = edge_break,
3006     .read_int_callback  = edge_interrupt_callback,
3007     .read_bulk_callback = edge_bulk_in_callback,
3008     .write_bulk_callback    = edge_bulk_out_data_callback,
3009 };
3010
3011 static struct usb_serial_driver edgeport_4port_device = {
3012     .driver = {
3013         .owner      = THIS_MODULE,
3014         .name       = "edgeport_4",
3015     },
3016     .description        = "Edgeport 4 port adapter",
3017     .id_table       = edgeport_4port_id_table,
3018     .num_ports      = 4,
3019     .num_bulk_in        = 1,
3020     .num_bulk_out       = 1,
3021     .num_interrupt_in   = 1,
3022     .open           = edge_open,
3023     .close          = edge_close,
3024     .throttle       = edge_throttle,
3025     .unthrottle     = edge_unthrottle,
3026     .attach         = edge_startup,
3027     .disconnect     = edge_disconnect,
3028     .release        = edge_release,
3029     .port_probe     = edge_port_probe,
3030     .port_remove        = edge_port_remove,
3031     .ioctl          = edge_ioctl,
3032     .set_termios        = edge_set_termios,
3033     .tiocmget       = edge_tiocmget,
3034     .tiocmset       = edge_tiocmset,
3035     .tiocmiwait     = usb_serial_generic_tiocmiwait,
3036     .get_icount     = usb_serial_generic_get_icount,
3037     .write          = edge_write,
3038     .write_room     = edge_write_room,
3039     .chars_in_buffer    = edge_chars_in_buffer,
3040     .break_ctl      = edge_break,
3041     .read_int_callback  = edge_interrupt_callback,
3042     .read_bulk_callback = edge_bulk_in_callback,
3043     .write_bulk_callback    = edge_bulk_out_data_callback,
3044 };
3045
3046 static struct usb_serial_driver edgeport_8port_device = {
3047     .driver = {
3048         .owner      = THIS_MODULE,
3049         .name       = "edgeport_8",
3050     },
3051     .description        = "Edgeport 8 port adapter",
3052     .id_table       = edgeport_8port_id_table,
3053     .num_ports      = 8,
3054     .num_bulk_in        = 1,
3055     .num_bulk_out       = 1,
3056     .num_interrupt_in   = 1,
3057     .open           = edge_open,
3058     .close          = edge_close,
3059     .throttle       = edge_throttle,
3060     .unthrottle     = edge_unthrottle,
3061     .attach         = edge_startup,
3062     .disconnect     = edge_disconnect,
3063     .release        = edge_release,
3064     .port_probe     = edge_port_probe,
3065     .port_remove        = edge_port_remove,
3066     .ioctl          = edge_ioctl,
3067     .set_termios        = edge_set_termios,
3068     .tiocmget       = edge_tiocmget,
3069     .tiocmset       = edge_tiocmset,
3070     .tiocmiwait     = usb_serial_generic_tiocmiwait,
3071     .get_icount     = usb_serial_generic_get_icount,
3072     .write          = edge_write,
3073     .write_room     = edge_write_room,
3074     .chars_in_buffer    = edge_chars_in_buffer,
3075     .break_ctl      = edge_break,
3076     .read_int_callback  = edge_interrupt_callback,
3077     .read_bulk_callback = edge_bulk_in_callback,
3078     .write_bulk_callback    = edge_bulk_out_data_callback,
3079 };
3080
3081 static struct usb_serial_driver epic_device = {
3082     .driver = {
3083         .owner      = THIS_MODULE,
3084         .name       = "epic",
3085     },
3086     .description        = "EPiC device",
3087     .id_table       = Epic_port_id_table,
3088     .num_ports      = 1,
3089     .num_bulk_in        = 1,
3090     .num_bulk_out       = 1,
3091     .num_interrupt_in   = 1,
3092     .open           = edge_open,
3093     .close          = edge_close,
3094     .throttle       = edge_throttle,
3095     .unthrottle     = edge_unthrottle,
3096     .attach         = edge_startup,
3097     .disconnect     = edge_disconnect,
3098     .release        = edge_release,
3099     .port_probe     = edge_port_probe,
3100     .port_remove        = edge_port_remove,
3101     .ioctl          = edge_ioctl,
3102     .set_termios        = edge_set_termios,
3103     .tiocmget       = edge_tiocmget,
3104     .tiocmset       = edge_tiocmset,
3105     .tiocmiwait     = usb_serial_generic_tiocmiwait,
3106     .get_icount     = usb_serial_generic_get_icount,
3107     .write          = edge_write,
3108     .write_room     = edge_write_room,
3109     .chars_in_buffer    = edge_chars_in_buffer,
3110     .break_ctl      = edge_break,
3111     .read_int_callback  = edge_interrupt_callback,
3112     .read_bulk_callback = edge_bulk_in_callback,
3113     .write_bulk_callback    = edge_bulk_out_data_callback,
3114 };
3115
3116 static struct usb_serial_driver * const serial_drivers[] = {
3117     &edgeport_2port_device, &edgeport_4port_device,
3118     &edgeport_8port_device, &epic_device, NULL
3119 };
3120
3121 module_usb_serial_driver(serial_drivers, id_table_combined);
3122
3123 MODULE_AUTHOR(DRIVER_AUTHOR);
3124 MODULE_DESCRIPTION(DRIVER_DESC);
3125 MODULE_LICENSE("GPL");
3126 MODULE_FIRMWARE("edgeport/boot.fw");
3127 MODULE_FIRMWARE("edgeport/boot2.fw");
3128 MODULE_FIRMWARE("edgeport/down.fw");
3129 MODULE_FIRMWARE("edgeport/down2.fw");