drivers/usb/serial/ti_usb_3410_5052.c

   1 /*
   2  * TI 3410/5052 USB Serial Driver
   3  *
   4  * Copyright (C) 2004 Texas Instruments
   5  *
   6  * This driver is based on the Linux io_ti driver, which is
   7  *   Copyright (C) 2000-2002 Inside Out Networks
   8  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * For questions or problems with this driver, contact Texas Instruments
  16  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  17  * Peter Berger <pberger@brimson.com>.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/errno.h>
  22 #include <linux/firmware.h>
  23 #include <linux/slab.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_driver.h>
  26 #include <linux/tty_flip.h>
  27 #include <linux/module.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/ioctl.h>
  30 #include <linux/serial.h>
  31 #include <linux/kfifo.h>
  32 #include <linux/mutex.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/usb.h>
  35 #include <linux/usb/serial.h>
  36
  37 /* Configuration ids */
  38 #define TI_BOOT_CONFIG                  1
  39 #define TI_ACTIVE_CONFIG                2
  40
  41 /* Vendor and product ids */
  42 #define TI_VENDOR_ID                    0x0451
  43 #define IBM_VENDOR_ID                   0x04b3
  44 #define TI_3410_PRODUCT_ID              0x3410
  45 #define IBM_4543_PRODUCT_ID             0x4543
  46 #define IBM_454B_PRODUCT_ID             0x454b
  47 #define IBM_454C_PRODUCT_ID             0x454c
  48 #define TI_3410_EZ430_ID                0xF430  /* TI ez430 development tool */
  49 #define TI_5052_BOOT_PRODUCT_ID         0x5052  /* no EEPROM, no firmware */
  50 #define TI_5152_BOOT_PRODUCT_ID         0x5152  /* no EEPROM, no firmware */
  51 #define TI_5052_EEPROM_PRODUCT_ID       0x505A  /* EEPROM, no firmware */
  52 #define TI_5052_FIRMWARE_PRODUCT_ID     0x505F  /* firmware is running */
  53 #define FRI2_PRODUCT_ID                 0x5053  /* Fish River Island II */
  54
  55 /* Multi-Tech vendor and product ids */
  56 #define MTS_VENDOR_ID                   0x06E0
  57 #define MTS_GSM_NO_FW_PRODUCT_ID        0xF108
  58 #define MTS_CDMA_NO_FW_PRODUCT_ID       0xF109
  59 #define MTS_CDMA_PRODUCT_ID             0xF110
  60 #define MTS_GSM_PRODUCT_ID              0xF111
  61 #define MTS_EDGE_PRODUCT_ID             0xF112
  62 #define MTS_MT9234MU_PRODUCT_ID         0xF114
  63 #define MTS_MT9234ZBA_PRODUCT_ID        0xF115
  64 #define MTS_MT9234ZBAOLD_PRODUCT_ID     0x0319
  65
  66 /* Abbott Diabetics vendor and product ids */
  67 #define ABBOTT_VENDOR_ID                0x1a61
  68 #define ABBOTT_STEREO_PLUG_ID           0x3410
  69 #define ABBOTT_PRODUCT_ID               ABBOTT_STEREO_PLUG_ID
  70 #define ABBOTT_STRIP_PORT_ID            0x3420
  71
  72 /* Honeywell vendor and product IDs */
  73 #define HONEYWELL_VENDOR_ID             0x10ac
  74 #define HONEYWELL_HGI80_PRODUCT_ID      0x0102  /* Honeywell HGI80 */
  75
  76 /* Moxa UPORT 11x0 vendor and product IDs */
  77 #define MXU1_VENDOR_ID                          0x110a
  78 #define MXU1_1110_PRODUCT_ID                    0x1110
  79 #define MXU1_1130_PRODUCT_ID                    0x1130
  80 #define MXU1_1150_PRODUCT_ID                    0x1150
  81 #define MXU1_1151_PRODUCT_ID                    0x1151
  82 #define MXU1_1131_PRODUCT_ID                    0x1131
  83
  84 /* Commands */
  85 #define TI_GET_VERSION                  0x01
  86 #define TI_GET_PORT_STATUS              0x02
  87 #define TI_GET_PORT_DEV_INFO            0x03
  88 #define TI_GET_CONFIG                   0x04
  89 #define TI_SET_CONFIG                   0x05
  90 #define TI_OPEN_PORT                    0x06
  91 #define TI_CLOSE_PORT                   0x07
  92 #define TI_START_PORT                   0x08
  93 #define TI_STOP_PORT                    0x09
  94 #define TI_TEST_PORT                    0x0A
  95 #define TI_PURGE_PORT                   0x0B
  96 #define TI_RESET_EXT_DEVICE             0x0C
  97 #define TI_WRITE_DATA                   0x80
  98 #define TI_READ_DATA                    0x81
  99 #define TI_REQ_TYPE_CLASS               0x82
 100
 101 /* Module identifiers */
 102 #define TI_I2C_PORT                     0x01
 103 #define TI_IEEE1284_PORT                0x02
 104 #define TI_UART1_PORT                   0x03
 105 #define TI_UART2_PORT                   0x04
 106 #define TI_RAM_PORT                     0x05
 107
 108 /* Modem status */
 109 #define TI_MSR_DELTA_CTS                0x01
 110 #define TI_MSR_DELTA_DSR                0x02
 111 #define TI_MSR_DELTA_RI                 0x04
 112 #define TI_MSR_DELTA_CD                 0x08
 113 #define TI_MSR_CTS                      0x10
 114 #define TI_MSR_DSR                      0x20
 115 #define TI_MSR_RI                       0x40
 116 #define TI_MSR_CD                       0x80
 117 #define TI_MSR_DELTA_MASK               0x0F
 118 #define TI_MSR_MASK                     0xF0
 119
 120 /* Line status */
 121 #define TI_LSR_OVERRUN_ERROR            0x01
 122 #define TI_LSR_PARITY_ERROR             0x02
 123 #define TI_LSR_FRAMING_ERROR            0x04
 124 #define TI_LSR_BREAK                    0x08
 125 #define TI_LSR_ERROR                    0x0F
 126 #define TI_LSR_RX_FULL                  0x10
 127 #define TI_LSR_TX_EMPTY                 0x20
 128
 129 /* Line control */
 130 #define TI_LCR_BREAK                    0x40
 131
 132 /* Modem control */
 133 #define TI_MCR_LOOP                     0x04
 134 #define TI_MCR_DTR                      0x10
 135 #define TI_MCR_RTS                      0x20
 136
 137 /* Mask settings */
 138 #define TI_UART_ENABLE_RTS_IN           0x0001
 139 #define TI_UART_DISABLE_RTS             0x0002
 140 #define TI_UART_ENABLE_PARITY_CHECKING  0x0008
 141 #define TI_UART_ENABLE_DSR_OUT          0x0010
 142 #define TI_UART_ENABLE_CTS_OUT          0x0020
 143 #define TI_UART_ENABLE_X_OUT            0x0040
 144 #define TI_UART_ENABLE_XA_OUT           0x0080
 145 #define TI_UART_ENABLE_X_IN             0x0100
 146 #define TI_UART_ENABLE_DTR_IN           0x0800
 147 #define TI_UART_DISABLE_DTR             0x1000
 148 #define TI_UART_ENABLE_MS_INTS          0x2000
 149 #define TI_UART_ENABLE_AUTO_START_DMA   0x4000
 150
 151 /* Parity */
 152 #define TI_UART_NO_PARITY               0x00
 153 #define TI_UART_ODD_PARITY              0x01
 154 #define TI_UART_EVEN_PARITY             0x02
 155 #define TI_UART_MARK_PARITY             0x03
 156 #define TI_UART_SPACE_PARITY            0x04
 157
 158 /* Stop bits */
 159 #define TI_UART_1_STOP_BITS             0x00
 160 #define TI_UART_1_5_STOP_BITS           0x01
 161 #define TI_UART_2_STOP_BITS             0x02
 162
 163 /* Bits per character */
 164 #define TI_UART_5_DATA_BITS             0x00
 165 #define TI_UART_6_DATA_BITS             0x01
 166 #define TI_UART_7_DATA_BITS             0x02
 167 #define TI_UART_8_DATA_BITS             0x03
 168
 169 /* 232/485 modes */
 170 #define TI_UART_232                     0x00
 171 #define TI_UART_485_RECEIVER_DISABLED   0x01
 172 #define TI_UART_485_RECEIVER_ENABLED    0x02
 173
 174 /* Pipe transfer mode and timeout */
 175 #define TI_PIPE_MODE_CONTINUOUS         0x01
 176 #define TI_PIPE_MODE_MASK               0x03
 177 #define TI_PIPE_TIMEOUT_MASK            0x7C
 178 #define TI_PIPE_TIMEOUT_ENABLE          0x80
 179
 180 /* Config struct */
 181 struct ti_uart_config {
 182         __u16   wBaudRate;
 183         __u16   wFlags;
 184         __u8    bDataBits;
 185         __u8    bParity;
 186         __u8    bStopBits;
 187         char    cXon;
 188         char    cXoff;
 189         __u8    bUartMode;
 190 } __packed;
 191
 192 /* Get port status */
 193 struct ti_port_status {
 194         __u8    bCmdCode;
 195         __u8    bModuleId;
 196         __u8    bErrorCode;
 197         __u8    bMSR;
 198         __u8    bLSR;
 199 } __packed;
 200
 201 /* Purge modes */
 202 #define TI_PURGE_OUTPUT                 0x00
 203 #define TI_PURGE_INPUT                  0x80
 204
 205 /* Read/Write data */
 206 #define TI_RW_DATA_ADDR_SFR             0x10
 207 #define TI_RW_DATA_ADDR_IDATA           0x20
 208 #define TI_RW_DATA_ADDR_XDATA           0x30
 209 #define TI_RW_DATA_ADDR_CODE            0x40
 210 #define TI_RW_DATA_ADDR_GPIO            0x50
 211 #define TI_RW_DATA_ADDR_I2C             0x60
 212 #define TI_RW_DATA_ADDR_FLASH           0x70
 213 #define TI_RW_DATA_ADDR_DSP             0x80
 214
 215 #define TI_RW_DATA_UNSPECIFIED          0x00
 216 #define TI_RW_DATA_BYTE                 0x01
 217 #define TI_RW_DATA_WORD                 0x02
 218 #define TI_RW_DATA_DOUBLE_WORD          0x04
 219
 220 struct ti_write_data_bytes {
 221         __u8    bAddrType;
 222         __u8    bDataType;
 223         __u8    bDataCounter;
 224         __be16  wBaseAddrHi;
 225         __be16  wBaseAddrLo;
 226         __u8    bData[0];
 227 } __packed;
 228
 229 struct ti_read_data_request {
 230         __u8    bAddrType;
 231         __u8    bDataType;
 232         __u8    bDataCounter;
 233         __be16  wBaseAddrHi;
 234         __be16  wBaseAddrLo;
 235 } __packed;
 236
 237 struct ti_read_data_bytes {
 238         __u8    bCmdCode;
 239         __u8    bModuleId;
 240         __u8    bErrorCode;
 241         __u8    bData[0];
 242 } __packed;
 243
 244 /* Interrupt struct */
 245 struct ti_interrupt {
 246         __u8    bICode;
 247         __u8    bIInfo;
 248 } __packed;
 249
 250 /* Interrupt codes */
 251 #define TI_CODE_HARDWARE_ERROR          0xFF
 252 #define TI_CODE_DATA_ERROR              0x03
 253 #define TI_CODE_MODEM_STATUS            0x04
 254
 255 /* Download firmware max packet size */
 256 #define TI_DOWNLOAD_MAX_PACKET_SIZE     64
 257
 258 /* Firmware image header */
 259 struct ti_firmware_header {
 260         __le16  wLength;
 261         __u8    bCheckSum;
 262 } __packed;
 263
 264 /* UART addresses */
 265 #define TI_UART1_BASE_ADDR              0xFFA0  /* UART 1 base address */
 266 #define TI_UART2_BASE_ADDR              0xFFB0  /* UART 2 base address */
 267 #define TI_UART_OFFSET_LCR              0x0002  /* UART MCR register offset */
 268 #define TI_UART_OFFSET_MCR              0x0004  /* UART MCR register offset */
 269
 270 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
 271 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
 272
 273 #define TI_FIRMWARE_BUF_SIZE    16284
 274
 275 #define TI_TRANSFER_TIMEOUT     2
 276
 277 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 278
 279 /* supported setserial flags */
 280 #define TI_SET_SERIAL_FLAGS     0
 281
 282 /* read urb states */
 283 #define TI_READ_URB_RUNNING     0
 284 #define TI_READ_URB_STOPPING    1
 285 #define TI_READ_URB_STOPPED     2
 286
 287 #define TI_EXTRA_VID_PID_COUNT  5
 288
 289 struct ti_port {
 290         int                     tp_is_open;
 291         __u8                    tp_msr;
 292         __u8                    tp_shadow_mcr;
 293         __u8                    tp_uart_mode;   /* 232 or 485 modes */
 294         unsigned int            tp_uart_base_addr;
 295         int                     tp_flags;
 296         struct ti_device        *tp_tdev;
 297         struct usb_serial_port  *tp_port;
 298         spinlock_t              tp_lock;
 299         int                     tp_read_urb_state;
 300         int                     tp_write_urb_in_use;
 301 };
 302
 303 struct ti_device {
 304         struct mutex            td_open_close_lock;
 305         int                     td_open_port_count;
 306         struct usb_serial       *td_serial;
 307         int                     td_is_3410;
 308         bool                    td_rs485_only;
 309         int                     td_urb_error;
 310 };
 311
 312 static int ti_startup(struct usb_serial *serial);
 313 static void ti_release(struct usb_serial *serial);
 314 static int ti_port_probe(struct usb_serial_port *port);
 315 static int ti_port_remove(struct usb_serial_port *port);
 316 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 317 static void ti_close(struct usb_serial_port *port);
 318 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 319                 const unsigned char *data, int count);
 320 static int ti_write_room(struct tty_struct *tty);
 321 static int ti_chars_in_buffer(struct tty_struct *tty);
 322 static bool ti_tx_empty(struct usb_serial_port *port);
 323 static void ti_throttle(struct tty_struct *tty);
 324 static void ti_unthrottle(struct tty_struct *tty);
 325 static int ti_ioctl(struct tty_struct *tty,
 326                 unsigned int cmd, unsigned long arg);
 327 static void ti_set_termios(struct tty_struct *tty,
 328                 struct usb_serial_port *port, struct ktermios *old_termios);
 329 static int ti_tiocmget(struct tty_struct *tty);
 330 static int ti_tiocmset(struct tty_struct *tty,
 331                 unsigned int set, unsigned int clear);
 332 static void ti_break(struct tty_struct *tty, int break_state);
 333 static void ti_interrupt_callback(struct urb *urb);
 334 static void ti_bulk_in_callback(struct urb *urb);
 335 static void ti_bulk_out_callback(struct urb *urb);
 336
 337 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 338                 int length);
 339 static void ti_send(struct ti_port *tport);
 340 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 341 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 342 static int ti_get_serial_info(struct ti_port *tport,
 343         struct serial_struct __user *ret_arg);
 344 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 345         struct serial_struct __user *new_arg);
 346 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 347
 348 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 349 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 350
 351 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 352         __u16 moduleid, __u16 value, __u8 *data, int size);
 353 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 354         __u16 moduleid, __u16 value, __u8 *data, int size);
 355
 356 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 357                          unsigned long addr, __u8 mask, __u8 byte);
 358
 359 static int ti_download_firmware(struct ti_device *tdev);
 360
 361 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 362
 363 static const struct usb_device_id ti_id_table_3410[] = {
 364         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 365         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 366         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 367         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 368         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 369         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 370         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 371         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 372         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 373         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 374         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 375         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 376         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 377         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 378         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 379         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 380         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 381         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
 382         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
 383         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
 384         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
 385         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
 386         { }     /* terminator */
 387 };
 388
 389 static const struct usb_device_id ti_id_table_5052[] = {
 390         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 391         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 392         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 393         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 394         { }
 395 };
 396
 397 static const struct usb_device_id ti_id_table_combined[] = {
 398         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 399         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 400         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 401         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 402         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 403         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 404         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 405         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 406         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 407         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 408         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 409         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 410         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 411         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 412         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 413         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 414         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 415         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 416         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 417         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 418         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 419         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
 420         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
 421         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
 422         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
 423         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
 424         { }     /* terminator */
 425 };
 426
 427 static struct usb_serial_driver ti_1port_device = {
 428         .driver = {
 429                 .owner          = THIS_MODULE,
 430                 .name           = "ti_usb_3410_5052_1",
 431         },
 432         .description            = "TI USB 3410 1 port adapter",
 433         .id_table               = ti_id_table_3410,
 434         .num_ports              = 1,
 435         .attach                 = ti_startup,
 436         .release                = ti_release,
 437         .port_probe             = ti_port_probe,
 438         .port_remove            = ti_port_remove,
 439         .open                   = ti_open,
 440         .close                  = ti_close,
 441         .write                  = ti_write,
 442         .write_room             = ti_write_room,
 443         .chars_in_buffer        = ti_chars_in_buffer,
 444         .tx_empty               = ti_tx_empty,
 445         .throttle               = ti_throttle,
 446         .unthrottle             = ti_unthrottle,
 447         .ioctl                  = ti_ioctl,
 448         .set_termios            = ti_set_termios,
 449         .tiocmget               = ti_tiocmget,
 450         .tiocmset               = ti_tiocmset,
 451         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 452         .get_icount             = usb_serial_generic_get_icount,
 453         .break_ctl              = ti_break,
 454         .read_int_callback      = ti_interrupt_callback,
 455         .read_bulk_callback     = ti_bulk_in_callback,
 456         .write_bulk_callback    = ti_bulk_out_callback,
 457 };
 458
 459 static struct usb_serial_driver ti_2port_device = {
 460         .driver = {
 461                 .owner          = THIS_MODULE,
 462                 .name           = "ti_usb_3410_5052_2",
 463         },
 464         .description            = "TI USB 5052 2 port adapter",
 465         .id_table               = ti_id_table_5052,
 466         .num_ports              = 2,
 467         .attach                 = ti_startup,
 468         .release                = ti_release,
 469         .port_probe             = ti_port_probe,
 470         .port_remove            = ti_port_remove,
 471         .open                   = ti_open,
 472         .close                  = ti_close,
 473         .write                  = ti_write,
 474         .write_room             = ti_write_room,
 475         .chars_in_buffer        = ti_chars_in_buffer,
 476         .tx_empty               = ti_tx_empty,
 477         .throttle               = ti_throttle,
 478         .unthrottle             = ti_unthrottle,
 479         .ioctl                  = ti_ioctl,
 480         .set_termios            = ti_set_termios,
 481         .tiocmget               = ti_tiocmget,
 482         .tiocmset               = ti_tiocmset,
 483         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 484         .get_icount             = usb_serial_generic_get_icount,
 485         .break_ctl              = ti_break,
 486         .read_int_callback      = ti_interrupt_callback,
 487         .read_bulk_callback     = ti_bulk_in_callback,
 488         .write_bulk_callback    = ti_bulk_out_callback,
 489 };
 490
 491 static struct usb_serial_driver * const serial_drivers[] = {
 492         &ti_1port_device, &ti_2port_device, NULL
 493 };
 494
 495 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 496 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 497 MODULE_LICENSE("GPL");
 498
 499 MODULE_FIRMWARE("ti_3410.fw");
 500 MODULE_FIRMWARE("ti_5052.fw");
 501 MODULE_FIRMWARE("mts_cdma.fw");
 502 MODULE_FIRMWARE("mts_gsm.fw");
 503 MODULE_FIRMWARE("mts_edge.fw");
 504 MODULE_FIRMWARE("mts_mt9234mu.fw");
 505 MODULE_FIRMWARE("mts_mt9234zba.fw");
 506 MODULE_FIRMWARE("moxa/moxa-1110.fw");
 507 MODULE_FIRMWARE("moxa/moxa-1130.fw");
 508 MODULE_FIRMWARE("moxa/moxa-1131.fw");
 509 MODULE_FIRMWARE("moxa/moxa-1150.fw");
 510 MODULE_FIRMWARE("moxa/moxa-1151.fw");
 511
 512 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 513 MODULE_PARM_DESC(closing_wait,
 514     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 515
 516 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 517
 518 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
 519
 520 static int ti_startup(struct usb_serial *serial)
 521 {
 522         struct ti_device *tdev;
 523         struct usb_device *dev = serial->dev;
 524         struct usb_host_interface *cur_altsetting;
 525         int num_endpoints;
 526         u16 vid, pid;
 527         int status;
 528
 529         dev_dbg(&dev->dev,
 530                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
 531                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 532                 dev->descriptor.bNumConfigurations,
 533                 dev->actconfig->desc.bConfigurationValue);
 534
 535         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 536         if (!tdev)
 537                 return -ENOMEM;
 538
 539         mutex_init(&tdev->td_open_close_lock);
 540         tdev->td_serial = serial;
 541         usb_set_serial_data(serial, tdev);
 542
 543         /* determine device type */
 544         if (serial->type == &ti_1port_device)
 545                 tdev->td_is_3410 = 1;
 546         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 547                 tdev->td_is_3410 ? "3410" : "5052");
 548
 549         vid = le16_to_cpu(dev->descriptor.idVendor);
 550         pid = le16_to_cpu(dev->descriptor.idProduct);
 551         if (vid == MXU1_VENDOR_ID) {
 552                 switch (pid) {
 553                 case MXU1_1130_PRODUCT_ID:
 554                 case MXU1_1131_PRODUCT_ID:
 555                         tdev->td_rs485_only = true;
 556                         break;
 557                 }
 558         }
 559
 560         cur_altsetting = serial->interface->cur_altsetting;
 561         num_endpoints = cur_altsetting->desc.bNumEndpoints;
 562
 563         /* if we have only 1 configuration and 1 endpoint, download firmware */
 564         if (dev->descriptor.bNumConfigurations == 1 && num_endpoints == 1) {
 565                 status = ti_download_firmware(tdev);
 566
 567                 if (status != 0)
 568                         goto free_tdev;
 569
 570                 /* 3410 must be reset, 5052 resets itself */
 571                 if (tdev->td_is_3410) {
 572                         msleep_interruptible(100);
 573                         usb_reset_device(dev);
 574                 }
 575
 576                 status = -ENODEV;
 577                 goto free_tdev;
 578         }
 579
 580         /* the second configuration must be set */
 581         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 582                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 583                 status = status ? status : -ENODEV;
 584                 goto free_tdev;
 585         }
 586
 587         return 0;
 588
 589 free_tdev:
 590         kfree(tdev);
 591         usb_set_serial_data(serial, NULL);
 592         return status;
 593 }
 594
 595
 596 static void ti_release(struct usb_serial *serial)
 597 {
 598         struct ti_device *tdev = usb_get_serial_data(serial);
 599
 600         kfree(tdev);
 601 }
 602
 603 static int ti_port_probe(struct usb_serial_port *port)
 604 {
 605         struct ti_port *tport;
 606
 607         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 608         if (!tport)
 609                 return -ENOMEM;
 610
 611         spin_lock_init(&tport->tp_lock);
 612         if (port == port->serial->port[0])
 613                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 614         else
 615                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 616         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 617         tport->tp_port = port;
 618         tport->tp_tdev = usb_get_serial_data(port->serial);
 619
 620         if (tport->tp_tdev->td_rs485_only)
 621                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
 622         else
 623                 tport->tp_uart_mode = TI_UART_232;
 624
 625         usb_set_serial_port_data(port, tport);
 626
 627         port->port.drain_delay = 3;
 628
 629         return 0;
 630 }
 631
 632 static int ti_port_remove(struct usb_serial_port *port)
 633 {
 634         struct ti_port *tport;
 635
 636         tport = usb_get_serial_port_data(port);
 637         kfree(tport);
 638
 639         return 0;
 640 }
 641
 642 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 643 {
 644         struct ti_port *tport = usb_get_serial_port_data(port);
 645         struct ti_device *tdev;
 646         struct usb_device *dev;
 647         struct urb *urb;
 648         int port_number;
 649         int status;
 650         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINUOUS |
 651                              TI_PIPE_TIMEOUT_ENABLE |
 652                              (TI_TRANSFER_TIMEOUT << 2));
 653
 654         if (tport == NULL)
 655                 return -ENODEV;
 656
 657         dev = port->serial->dev;
 658         tdev = tport->tp_tdev;
 659
 660         /* only one open on any port on a device at a time */
 661         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 662                 return -ERESTARTSYS;
 663
 664         port_number = port->port_number;
 665
 666         tport->tp_msr = 0;
 667         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 668
 669         /* start interrupt urb the first time a port is opened on this device */
 670         if (tdev->td_open_port_count == 0) {
 671                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 672                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 673                 if (!urb) {
 674                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 675                         status = -EINVAL;
 676                         goto release_lock;
 677                 }
 678                 urb->context = tdev;
 679                 status = usb_submit_urb(urb, GFP_KERNEL);
 680                 if (status) {
 681                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 682                         goto release_lock;
 683                 }
 684         }
 685
 686         if (tty)
 687                 ti_set_termios(tty, port, &tty->termios);
 688
 689         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 690         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 691                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 692         if (status) {
 693                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 694                         __func__, status);
 695                 goto unlink_int_urb;
 696         }
 697
 698         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 699         status = ti_command_out_sync(tdev, TI_START_PORT,
 700                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 701         if (status) {
 702                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 703                                                         __func__, status);
 704                 goto unlink_int_urb;
 705         }
 706
 707         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 708         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 709                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 710         if (status) {
 711                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 712                                                         __func__, status);
 713                 goto unlink_int_urb;
 714         }
 715         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 716                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 717         if (status) {
 718                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 719                                                         __func__, status);
 720                 goto unlink_int_urb;
 721         }
 722
 723         /* reset the data toggle on the bulk endpoints to work around bug in
 724          * host controllers where things get out of sync some times */
 725         usb_clear_halt(dev, port->write_urb->pipe);
 726         usb_clear_halt(dev, port->read_urb->pipe);
 727
 728         if (tty)
 729                 ti_set_termios(tty, port, &tty->termios);
 730
 731         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 732         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 733                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 734         if (status) {
 735                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 736                                                         __func__, status);
 737                 goto unlink_int_urb;
 738         }
 739
 740         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 741         status = ti_command_out_sync(tdev, TI_START_PORT,
 742                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 743         if (status) {
 744                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 745                                                         __func__, status);
 746                 goto unlink_int_urb;
 747         }
 748
 749         /* start read urb */
 750         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 751         urb = port->read_urb;
 752         if (!urb) {
 753                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 754                 status = -EINVAL;
 755                 goto unlink_int_urb;
 756         }
 757         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 758         urb->context = tport;
 759         status = usb_submit_urb(urb, GFP_KERNEL);
 760         if (status) {
 761                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 762                                                         __func__, status);
 763                 goto unlink_int_urb;
 764         }
 765
 766         tport->tp_is_open = 1;
 767         ++tdev->td_open_port_count;
 768
 769         goto release_lock;
 770
 771 unlink_int_urb:
 772         if (tdev->td_open_port_count == 0)
 773                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 774 release_lock:
 775         mutex_unlock(&tdev->td_open_close_lock);
 776         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 777         return status;
 778 }
 779
 780
 781 static void ti_close(struct usb_serial_port *port)
 782 {
 783         struct ti_device *tdev;
 784         struct ti_port *tport;
 785         int port_number;
 786         int status;
 787         int do_unlock;
 788         unsigned long flags;
 789
 790         tdev = usb_get_serial_data(port->serial);
 791         tport = usb_get_serial_port_data(port);
 792         if (tdev == NULL || tport == NULL)
 793                 return;
 794
 795         tport->tp_is_open = 0;
 796
 797         usb_kill_urb(port->read_urb);
 798         usb_kill_urb(port->write_urb);
 799         tport->tp_write_urb_in_use = 0;
 800         spin_lock_irqsave(&tport->tp_lock, flags);
 801         kfifo_reset_out(&port->write_fifo);
 802         spin_unlock_irqrestore(&tport->tp_lock, flags);
 803
 804         port_number = port->port_number;
 805
 806         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 807         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 808                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 809         if (status)
 810                 dev_err(&port->dev,
 811                         "%s - cannot send close port command, %d\n"
 812                                                         , __func__, status);
 813
 814         /* if mutex_lock is interrupted, continue anyway */
 815         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 816         --tport->tp_tdev->td_open_port_count;
 817         if (tport->tp_tdev->td_open_port_count <= 0) {
 818                 /* last port is closed, shut down interrupt urb */
 819                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 820                 tport->tp_tdev->td_open_port_count = 0;
 821         }
 822         if (do_unlock)
 823                 mutex_unlock(&tdev->td_open_close_lock);
 824 }
 825
 826
 827 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 828                         const unsigned char *data, int count)
 829 {
 830         struct ti_port *tport = usb_get_serial_port_data(port);
 831
 832         if (count == 0) {
 833                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 834                 return 0;
 835         }
 836
 837         if (tport == NULL || !tport->tp_is_open)
 838                 return -ENODEV;
 839
 840         count = kfifo_in_locked(&port->write_fifo, data, count,
 841                                                         &tport->tp_lock);
 842         ti_send(tport);
 843
 844         return count;
 845 }
 846
 847
 848 static int ti_write_room(struct tty_struct *tty)
 849 {
 850         struct usb_serial_port *port = tty->driver_data;
 851         struct ti_port *tport = usb_get_serial_port_data(port);
 852         int room = 0;
 853         unsigned long flags;
 854
 855         if (tport == NULL)
 856                 return 0;
 857
 858         spin_lock_irqsave(&tport->tp_lock, flags);
 859         room = kfifo_avail(&port->write_fifo);
 860         spin_unlock_irqrestore(&tport->tp_lock, flags);
 861
 862         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 863         return room;
 864 }
 865
 866
 867 static int ti_chars_in_buffer(struct tty_struct *tty)
 868 {
 869         struct usb_serial_port *port = tty->driver_data;
 870         struct ti_port *tport = usb_get_serial_port_data(port);
 871         int chars = 0;
 872         unsigned long flags;
 873
 874         if (tport == NULL)
 875                 return 0;
 876
 877         spin_lock_irqsave(&tport->tp_lock, flags);
 878         chars = kfifo_len(&port->write_fifo);
 879         spin_unlock_irqrestore(&tport->tp_lock, flags);
 880
 881         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 882         return chars;
 883 }
 884
 885 static bool ti_tx_empty(struct usb_serial_port *port)
 886 {
 887         struct ti_port *tport = usb_get_serial_port_data(port);
 888         int ret;
 889         u8 lsr;
 890
 891         ret = ti_get_lsr(tport, &lsr);
 892         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 893                 return false;
 894
 895         return true;
 896 }
 897
 898 static void ti_throttle(struct tty_struct *tty)
 899 {
 900         struct usb_serial_port *port = tty->driver_data;
 901         struct ti_port *tport = usb_get_serial_port_data(port);
 902
 903         if (tport == NULL)
 904                 return;
 905
 906         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 907                 ti_stop_read(tport, tty);
 908
 909 }
 910
 911
 912 static void ti_unthrottle(struct tty_struct *tty)
 913 {
 914         struct usb_serial_port *port = tty->driver_data;
 915         struct ti_port *tport = usb_get_serial_port_data(port);
 916         int status;
 917
 918         if (tport == NULL)
 919                 return;
 920
 921         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 922                 status = ti_restart_read(tport, tty);
 923                 if (status)
 924                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 925                                                         __func__, status);
 926         }
 927 }
 928
 929 static int ti_ioctl(struct tty_struct *tty,
 930         unsigned int cmd, unsigned long arg)
 931 {
 932         struct usb_serial_port *port = tty->driver_data;
 933         struct ti_port *tport = usb_get_serial_port_data(port);
 934
 935         if (tport == NULL)
 936                 return -ENODEV;
 937
 938         switch (cmd) {
 939         case TIOCGSERIAL:
 940                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 941                 return ti_get_serial_info(tport,
 942                                 (struct serial_struct __user *)arg);
 943         case TIOCSSERIAL:
 944                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 945                 return ti_set_serial_info(tty, tport,
 946                                 (struct serial_struct __user *)arg);
 947         }
 948         return -ENOIOCTLCMD;
 949 }
 950
 951
 952 static void ti_set_termios(struct tty_struct *tty,
 953                 struct usb_serial_port *port, struct ktermios *old_termios)
 954 {
 955         struct ti_port *tport = usb_get_serial_port_data(port);
 956         struct ti_uart_config *config;
 957         tcflag_t cflag, iflag;
 958         int baud;
 959         int status;
 960         int port_number = port->port_number;
 961         unsigned int mcr;
 962
 963         cflag = tty->termios.c_cflag;
 964         iflag = tty->termios.c_iflag;
 965
 966         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 967         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 968                 old_termios->c_cflag, old_termios->c_iflag);
 969
 970         if (tport == NULL)
 971                 return;
 972
 973         config = kmalloc(sizeof(*config), GFP_KERNEL);
 974         if (!config)
 975                 return;
 976
 977         config->wFlags = 0;
 978
 979         /* these flags must be set */
 980         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 981         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 982         config->bUartMode = (__u8)(tport->tp_uart_mode);
 983
 984         switch (cflag & CSIZE) {
 985         case CS5:
 986                     config->bDataBits = TI_UART_5_DATA_BITS;
 987                     break;
 988         case CS6:
 989                     config->bDataBits = TI_UART_6_DATA_BITS;
 990                     break;
 991         case CS7:
 992                     config->bDataBits = TI_UART_7_DATA_BITS;
 993                     break;
 994         default:
 995         case CS8:
 996                     config->bDataBits = TI_UART_8_DATA_BITS;
 997                     break;
 998         }
 999
1000         /* CMSPAR isn't supported by this driver */
1001         tty->termios.c_cflag &= ~CMSPAR;
1002
1003         if (cflag & PARENB) {
1004                 if (cflag & PARODD) {
1005                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
1006                         config->bParity = TI_UART_ODD_PARITY;
1007                 } else {
1008                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
1009                         config->bParity = TI_UART_EVEN_PARITY;
1010                 }
1011         } else {
1012                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
1013                 config->bParity = TI_UART_NO_PARITY;
1014         }
1015
1016         if (cflag & CSTOPB)
1017                 config->bStopBits = TI_UART_2_STOP_BITS;
1018         else
1019                 config->bStopBits = TI_UART_1_STOP_BITS;
1020
1021         if (cflag & CRTSCTS) {
1022                 /* RTS flow control must be off to drop RTS for baud rate B0 */
1023                 if ((cflag & CBAUD) != B0)
1024                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
1025                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
1026         } else {
1027                 ti_restart_read(tport, tty);
1028         }
1029
1030         if (I_IXOFF(tty) || I_IXON(tty)) {
1031                 config->cXon  = START_CHAR(tty);
1032                 config->cXoff = STOP_CHAR(tty);
1033
1034                 if (I_IXOFF(tty))
1035                         config->wFlags |= TI_UART_ENABLE_X_IN;
1036                 else
1037                         ti_restart_read(tport, tty);
1038
1039                 if (I_IXON(tty))
1040                         config->wFlags |= TI_UART_ENABLE_X_OUT;
1041         }
1042
1043         baud = tty_get_baud_rate(tty);
1044         if (!baud)
1045                 baud = 9600;
1046         if (tport->tp_tdev->td_is_3410)
1047                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
1048         else
1049                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
1050
1051         /* FIXME: Should calculate resulting baud here and report it back */
1052         if ((cflag & CBAUD) != B0)
1053                 tty_encode_baud_rate(tty, baud, baud);
1054
1055         dev_dbg(&port->dev,
1056                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
1057                 __func__, baud, config->wBaudRate, config->wFlags,
1058                 config->bDataBits, config->bParity, config->bStopBits,
1059                 config->cXon, config->cXoff, config->bUartMode);
1060
1061         cpu_to_be16s(&config->wBaudRate);
1062         cpu_to_be16s(&config->wFlags);
1063
1064         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1065                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1066                 sizeof(*config));
1067         if (status)
1068                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
1069                                         __func__, port_number, status);
1070
1071         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1072         mcr = tport->tp_shadow_mcr;
1073         /* if baud rate is B0, clear RTS and DTR */
1074         if ((cflag & CBAUD) == B0)
1075                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1076         status = ti_set_mcr(tport, mcr);
1077         if (status)
1078                 dev_err(&port->dev,
1079                         "%s - cannot set modem control on port %d, %d\n",
1080                                                 __func__, port_number, status);
1081
1082         kfree(config);
1083 }
1084
1085
1086 static int ti_tiocmget(struct tty_struct *tty)
1087 {
1088         struct usb_serial_port *port = tty->driver_data;
1089         struct ti_port *tport = usb_get_serial_port_data(port);
1090         unsigned int result;
1091         unsigned int msr;
1092         unsigned int mcr;
1093         unsigned long flags;
1094
1095         if (tport == NULL)
1096                 return -ENODEV;
1097
1098         spin_lock_irqsave(&tport->tp_lock, flags);
1099         msr = tport->tp_msr;
1100         mcr = tport->tp_shadow_mcr;
1101         spin_unlock_irqrestore(&tport->tp_lock, flags);
1102
1103         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1104                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1105                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1106                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1107                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1108                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1109                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1110
1111         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1112
1113         return result;
1114 }
1115
1116
1117 static int ti_tiocmset(struct tty_struct *tty,
1118                                 unsigned int set, unsigned int clear)
1119 {
1120         struct usb_serial_port *port = tty->driver_data;
1121         struct ti_port *tport = usb_get_serial_port_data(port);
1122         unsigned int mcr;
1123         unsigned long flags;
1124
1125         if (tport == NULL)
1126                 return -ENODEV;
1127
1128         spin_lock_irqsave(&tport->tp_lock, flags);
1129         mcr = tport->tp_shadow_mcr;
1130
1131         if (set & TIOCM_RTS)
1132                 mcr |= TI_MCR_RTS;
1133         if (set & TIOCM_DTR)
1134                 mcr |= TI_MCR_DTR;
1135         if (set & TIOCM_LOOP)
1136                 mcr |= TI_MCR_LOOP;
1137
1138         if (clear & TIOCM_RTS)
1139                 mcr &= ~TI_MCR_RTS;
1140         if (clear & TIOCM_DTR)
1141                 mcr &= ~TI_MCR_DTR;
1142         if (clear & TIOCM_LOOP)
1143                 mcr &= ~TI_MCR_LOOP;
1144         spin_unlock_irqrestore(&tport->tp_lock, flags);
1145
1146         return ti_set_mcr(tport, mcr);
1147 }
1148
1149
1150 static void ti_break(struct tty_struct *tty, int break_state)
1151 {
1152         struct usb_serial_port *port = tty->driver_data;
1153         struct ti_port *tport = usb_get_serial_port_data(port);
1154         int status;
1155
1156         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1157
1158         if (tport == NULL)
1159                 return;
1160
1161         status = ti_write_byte(port, tport->tp_tdev,
1162                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1163                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1164
1165         if (status)
1166                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1167 }
1168
1169 static int ti_get_port_from_code(unsigned char code)
1170 {
1171         return (code >> 4) - 3;
1172 }
1173
1174 static int ti_get_func_from_code(unsigned char code)
1175 {
1176         return code & 0x0f;
1177 }
1178
1179 static void ti_interrupt_callback(struct urb *urb)
1180 {
1181         struct ti_device *tdev = urb->context;
1182         struct usb_serial_port *port;
1183         struct usb_serial *serial = tdev->td_serial;
1184         struct ti_port *tport;
1185         struct device *dev = &urb->dev->dev;
1186         unsigned char *data = urb->transfer_buffer;
1187         int length = urb->actual_length;
1188         int port_number;
1189         int function;
1190         int status = urb->status;
1191         int retval;
1192         __u8 msr;
1193
1194         switch (status) {
1195         case 0:
1196                 break;
1197         case -ECONNRESET:
1198         case -ENOENT:
1199         case -ESHUTDOWN:
1200                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1201                 tdev->td_urb_error = 1;
1202                 return;
1203         default:
1204                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1205                 tdev->td_urb_error = 1;
1206                 goto exit;
1207         }
1208
1209         if (length != 2) {
1210                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1211                 goto exit;
1212         }
1213
1214         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1215                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1216                 goto exit;
1217         }
1218
1219         port_number = ti_get_port_from_code(data[0]);
1220         function = ti_get_func_from_code(data[0]);
1221
1222         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1223                 __func__, port_number, function, data[1]);
1224
1225         if (port_number >= serial->num_ports) {
1226                 dev_err(dev, "%s - bad port number, %d\n",
1227                                                 __func__, port_number);
1228                 goto exit;
1229         }
1230
1231         port = serial->port[port_number];
1232
1233         tport = usb_get_serial_port_data(port);
1234         if (!tport)
1235                 goto exit;
1236
1237         switch (function) {
1238         case TI_CODE_DATA_ERROR:
1239                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1240                         __func__, port_number, data[1]);
1241                 break;
1242
1243         case TI_CODE_MODEM_STATUS:
1244                 msr = data[1];
1245                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1246                 ti_handle_new_msr(tport, msr);
1247                 break;
1248
1249         default:
1250                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1251                                                         __func__, data[1]);
1252                 break;
1253         }
1254
1255 exit:
1256         retval = usb_submit_urb(urb, GFP_ATOMIC);
1257         if (retval)
1258                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1259                         __func__, retval);
1260 }
1261
1262
1263 static void ti_bulk_in_callback(struct urb *urb)
1264 {
1265         struct ti_port *tport = urb->context;
1266         struct usb_serial_port *port = tport->tp_port;
1267         struct device *dev = &urb->dev->dev;
1268         int status = urb->status;
1269         int retval = 0;
1270
1271         switch (status) {
1272         case 0:
1273                 break;
1274         case -ECONNRESET:
1275         case -ENOENT:
1276         case -ESHUTDOWN:
1277                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1278                 tport->tp_tdev->td_urb_error = 1;
1279                 return;
1280         default:
1281                 dev_err(dev, "%s - nonzero urb status, %d\n",
1282                         __func__, status);
1283                 tport->tp_tdev->td_urb_error = 1;
1284         }
1285
1286         if (status == -EPIPE)
1287                 goto exit;
1288
1289         if (status) {
1290                 dev_err(dev, "%s - stopping read!\n", __func__);
1291                 return;
1292         }
1293
1294         if (urb->actual_length) {
1295                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1296                                       urb->transfer_buffer);
1297
1298                 if (!tport->tp_is_open)
1299                         dev_dbg(dev, "%s - port closed, dropping data\n",
1300                                 __func__);
1301                 else
1302                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1303                 spin_lock(&tport->tp_lock);
1304                 port->icount.rx += urb->actual_length;
1305                 spin_unlock(&tport->tp_lock);
1306         }
1307
1308 exit:
1309         /* continue to read unless stopping */
1310         spin_lock(&tport->tp_lock);
1311         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1312                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1313         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1314                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1315
1316         spin_unlock(&tport->tp_lock);
1317         if (retval)
1318                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1319                         __func__, retval);
1320 }
1321
1322
1323 static void ti_bulk_out_callback(struct urb *urb)
1324 {
1325         struct ti_port *tport = urb->context;
1326         struct usb_serial_port *port = tport->tp_port;
1327         int status = urb->status;
1328
1329         tport->tp_write_urb_in_use = 0;
1330
1331         switch (status) {
1332         case 0:
1333                 break;
1334         case -ECONNRESET:
1335         case -ENOENT:
1336         case -ESHUTDOWN:
1337                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1338                 tport->tp_tdev->td_urb_error = 1;
1339                 return;
1340         default:
1341                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1342                         __func__, status);
1343                 tport->tp_tdev->td_urb_error = 1;
1344         }
1345
1346         /* send any buffered data */
1347         ti_send(tport);
1348 }
1349
1350
1351 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1352                 int length)
1353 {
1354         int cnt;
1355
1356         do {
1357                 cnt = tty_insert_flip_string(&port->port, data, length);
1358                 if (cnt < length) {
1359                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1360                                                 __func__, length - cnt);
1361                         if (cnt == 0)
1362                                 break;
1363                 }
1364                 tty_flip_buffer_push(&port->port);
1365                 data += cnt;
1366                 length -= cnt;
1367         } while (length > 0);
1368 }
1369
1370
1371 static void ti_send(struct ti_port *tport)
1372 {
1373         int count, result;
1374         struct usb_serial_port *port = tport->tp_port;
1375         unsigned long flags;
1376
1377         spin_lock_irqsave(&tport->tp_lock, flags);
1378
1379         if (tport->tp_write_urb_in_use)
1380                 goto unlock;
1381
1382         count = kfifo_out(&port->write_fifo,
1383                                 port->write_urb->transfer_buffer,
1384                                 port->bulk_out_size);
1385
1386         if (count == 0)
1387                 goto unlock;
1388
1389         tport->tp_write_urb_in_use = 1;
1390
1391         spin_unlock_irqrestore(&tport->tp_lock, flags);
1392
1393         usb_serial_debug_data(&port->dev, __func__, count,
1394                               port->write_urb->transfer_buffer);
1395
1396         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1397                            usb_sndbulkpipe(port->serial->dev,
1398                                             port->bulk_out_endpointAddress),
1399                            port->write_urb->transfer_buffer, count,
1400                            ti_bulk_out_callback, tport);
1401
1402         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1403         if (result) {
1404                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1405                                                         __func__, result);
1406                 tport->tp_write_urb_in_use = 0;
1407                 /* TODO: reschedule ti_send */
1408         } else {
1409                 spin_lock_irqsave(&tport->tp_lock, flags);
1410                 port->icount.tx += count;
1411                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1412         }
1413
1414         /* more room in the buffer for new writes, wakeup */
1415         tty_port_tty_wakeup(&port->port);
1416
1417         return;
1418 unlock:
1419         spin_unlock_irqrestore(&tport->tp_lock, flags);
1420         return;
1421 }
1422
1423
1424 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1425 {
1426         unsigned long flags;
1427         int status;
1428
1429         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1430                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1431                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1432
1433         spin_lock_irqsave(&tport->tp_lock, flags);
1434         if (!status)
1435                 tport->tp_shadow_mcr = mcr;
1436         spin_unlock_irqrestore(&tport->tp_lock, flags);
1437
1438         return status;
1439 }
1440
1441
1442 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1443 {
1444         int size, status;
1445         struct ti_device *tdev = tport->tp_tdev;
1446         struct usb_serial_port *port = tport->tp_port;
1447         int port_number = port->port_number;
1448         struct ti_port_status *data;
1449
1450         size = sizeof(struct ti_port_status);
1451         data = kmalloc(size, GFP_KERNEL);
1452         if (!data)
1453                 return -ENOMEM;
1454
1455         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1456                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1457         if (status) {
1458                 dev_err(&port->dev,
1459                         "%s - get port status command failed, %d\n",
1460                                                         __func__, status);
1461                 goto free_data;
1462         }
1463
1464         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1465
1466         *lsr = data->bLSR;
1467
1468 free_data:
1469         kfree(data);
1470         return status;
1471 }
1472
1473
1474 static int ti_get_serial_info(struct ti_port *tport,
1475         struct serial_struct __user *ret_arg)
1476 {
1477         struct usb_serial_port *port = tport->tp_port;
1478         struct serial_struct ret_serial;
1479         unsigned cwait;
1480
1481         if (!ret_arg)
1482                 return -EFAULT;
1483
1484         cwait = port->port.closing_wait;
1485         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1486                 cwait = jiffies_to_msecs(cwait) / 10;
1487
1488         memset(&ret_serial, 0, sizeof(ret_serial));
1489
1490         ret_serial.type = PORT_16550A;
1491         ret_serial.line = port->minor;
1492         ret_serial.port = port->port_number;
1493         ret_serial.flags = tport->tp_flags;
1494         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1495         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1496         ret_serial.closing_wait = cwait;
1497
1498         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1499                 return -EFAULT;
1500
1501         return 0;
1502 }
1503
1504
1505 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1506         struct serial_struct __user *new_arg)
1507 {
1508         struct serial_struct new_serial;
1509         unsigned cwait;
1510
1511         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1512                 return -EFAULT;
1513
1514         cwait = new_serial.closing_wait;
1515         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1516                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1517
1518         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1519         tport->tp_port->port.closing_wait = cwait;
1520
1521         return 0;
1522 }
1523
1524
1525 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1526 {
1527         struct async_icount *icount;
1528         struct tty_struct *tty;
1529         unsigned long flags;
1530
1531         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1532
1533         if (msr & TI_MSR_DELTA_MASK) {
1534                 spin_lock_irqsave(&tport->tp_lock, flags);
1535                 icount = &tport->tp_port->icount;
1536                 if (msr & TI_MSR_DELTA_CTS)
1537                         icount->cts++;
1538                 if (msr & TI_MSR_DELTA_DSR)
1539                         icount->dsr++;
1540                 if (msr & TI_MSR_DELTA_CD)
1541                         icount->dcd++;
1542                 if (msr & TI_MSR_DELTA_RI)
1543                         icount->rng++;
1544                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1545                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1546         }
1547
1548         tport->tp_msr = msr & TI_MSR_MASK;
1549
1550         /* handle CTS flow control */
1551         tty = tty_port_tty_get(&tport->tp_port->port);
1552         if (tty && C_CRTSCTS(tty)) {
1553                 if (msr & TI_MSR_CTS)
1554                         tty_wakeup(tty);
1555         }
1556         tty_kref_put(tty);
1557 }
1558
1559
1560 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1561 {
1562         unsigned long flags;
1563
1564         spin_lock_irqsave(&tport->tp_lock, flags);
1565
1566         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1567                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1568
1569         spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 }
1571
1572
1573 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1574 {
1575         struct urb *urb;
1576         int status = 0;
1577         unsigned long flags;
1578
1579         spin_lock_irqsave(&tport->tp_lock, flags);
1580
1581         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1582                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583                 urb = tport->tp_port->read_urb;
1584                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1585                 urb->context = tport;
1586                 status = usb_submit_urb(urb, GFP_KERNEL);
1587         } else  {
1588                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1589                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1590         }
1591
1592         return status;
1593 }
1594
1595
1596 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1597         __u16 moduleid, __u16 value, __u8 *data, int size)
1598 {
1599         int status;
1600
1601         status = usb_control_msg(tdev->td_serial->dev,
1602                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1603                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1604                 value, moduleid, data, size, 1000);
1605
1606         if (status == size)
1607                 status = 0;
1608
1609         if (status > 0)
1610                 status = -ECOMM;
1611
1612         return status;
1613 }
1614
1615
1616 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1617         __u16 moduleid, __u16 value, __u8 *data, int size)
1618 {
1619         int status;
1620
1621         status = usb_control_msg(tdev->td_serial->dev,
1622                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1623                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1624                 value, moduleid, data, size, 1000);
1625
1626         if (status == size)
1627                 status = 0;
1628
1629         if (status > 0)
1630                 status = -ECOMM;
1631
1632         return status;
1633 }
1634
1635
1636 static int ti_write_byte(struct usb_serial_port *port,
1637                         struct ti_device *tdev, unsigned long addr,
1638                         __u8 mask, __u8 byte)
1639 {
1640         int status;
1641         unsigned int size;
1642         struct ti_write_data_bytes *data;
1643
1644         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1645                 addr, mask, byte);
1646
1647         size = sizeof(struct ti_write_data_bytes) + 2;
1648         data = kmalloc(size, GFP_KERNEL);
1649         if (!data)
1650                 return -ENOMEM;
1651
1652         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1653         data->bDataType = TI_RW_DATA_BYTE;
1654         data->bDataCounter = 1;
1655         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1656         data->wBaseAddrLo = cpu_to_be16(addr);
1657         data->bData[0] = mask;
1658         data->bData[1] = byte;
1659
1660         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1661                 (__u8 *)data, size);
1662
1663         if (status < 0)
1664                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1665
1666         kfree(data);
1667
1668         return status;
1669 }
1670
1671 static int ti_do_download(struct usb_device *dev, int pipe,
1672                                                 u8 *buffer, int size)
1673 {
1674         int pos;
1675         u8 cs = 0;
1676         int done;
1677         struct ti_firmware_header *header;
1678         int status = 0;
1679         int len;
1680
1681         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1682                 cs = (__u8)(cs + buffer[pos]);
1683
1684         header = (struct ti_firmware_header *)buffer;
1685         header->wLength = cpu_to_le16((__u16)(size
1686                                         - sizeof(struct ti_firmware_header)));
1687         header->bCheckSum = cs;
1688
1689         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1690         for (pos = 0; pos < size; pos += done) {
1691                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1692                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1693                                                                 &done, 1000);
1694                 if (status)
1695                         break;
1696         }
1697         return status;
1698 }
1699
1700 static int ti_download_firmware(struct ti_device *tdev)
1701 {
1702         int status;
1703         int buffer_size;
1704         __u8 *buffer;
1705         struct usb_device *dev = tdev->td_serial->dev;
1706         unsigned int pipe = usb_sndbulkpipe(dev,
1707                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1708         const struct firmware *fw_p;
1709         char buf[32];
1710
1711         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1712                 snprintf(buf,
1713                         sizeof(buf),
1714                         "moxa/moxa-%04x.fw",
1715                         le16_to_cpu(dev->descriptor.idProduct));
1716
1717                 status = request_firmware(&fw_p, buf, &dev->dev);
1718                 goto check_firmware;
1719         }
1720
1721         /* try ID specific firmware first, then try generic firmware */
1722         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1723                         le16_to_cpu(dev->descriptor.idVendor),
1724                         le16_to_cpu(dev->descriptor.idProduct));
1725         status = request_firmware(&fw_p, buf, &dev->dev);
1726
1727         if (status != 0) {
1728                 buf[0] = '\0';
1729                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1730                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1731                         case MTS_CDMA_PRODUCT_ID:
1732                                 strcpy(buf, "mts_cdma.fw");
1733                                 break;
1734                         case MTS_GSM_PRODUCT_ID:
1735                                 strcpy(buf, "mts_gsm.fw");
1736                                 break;
1737                         case MTS_EDGE_PRODUCT_ID:
1738                                 strcpy(buf, "mts_edge.fw");
1739                                 break;
1740                         case MTS_MT9234MU_PRODUCT_ID:
1741                                 strcpy(buf, "mts_mt9234mu.fw");
1742                                 break;
1743                         case MTS_MT9234ZBA_PRODUCT_ID:
1744                                 strcpy(buf, "mts_mt9234zba.fw");
1745                                 break;
1746                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1747                                 strcpy(buf, "mts_mt9234zba.fw");
1748                                 break;                  }
1749                 }
1750                 if (buf[0] == '\0') {
1751                         if (tdev->td_is_3410)
1752                                 strcpy(buf, "ti_3410.fw");
1753                         else
1754                                 strcpy(buf, "ti_5052.fw");
1755                 }
1756                 status = request_firmware(&fw_p, buf, &dev->dev);
1757         }
1758
1759 check_firmware:
1760         if (status) {
1761                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1762                 return -ENOENT;
1763         }
1764         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1765                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1766                 release_firmware(fw_p);
1767                 return -ENOENT;
1768         }
1769
1770         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1771         buffer = kmalloc(buffer_size, GFP_KERNEL);
1772         if (buffer) {
1773                 memcpy(buffer, fw_p->data, fw_p->size);
1774                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1775                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1776                 kfree(buffer);
1777         } else {
1778                 status = -ENOMEM;
1779         }
1780         release_firmware(fw_p);
1781         if (status) {
1782                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1783                                                         __func__, status);
1784                 return status;
1785         }
1786
1787         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1788
1789         return 0;
1790 }