1 /* vi: ts=8 sw=8 2 * 3 * TI 3410/5052 USB Serial Driver 4 * 5 * Copyright (C) 2004 Texas Instruments 6 * 7 * This driver is based on the Linux io_ti driver, which is 8 * Copyright (C) 2000-2002 Inside Out Networks 9 * Copyright (C) 2001-2002 Greg Kroah-Hartman 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * For questions or problems with this driver, contact Texas Instruments 17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or 18 * Peter Berger <pberger@brimson.com>. 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/errno.h> 23 #include <linux/firmware.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/tty.h> 27 #include <linux/tty_driver.h> 28 #include <linux/tty_flip.h> 29 #include <linux/module.h> 30 #include <linux/spinlock.h> 31 #include <linux/ioctl.h> 32 #include <linux/serial.h> 33 #include <linux/kfifo.h> 34 #include <linux/mutex.h> 35 #include <linux/uaccess.h> 36 #include <linux/usb.h> 37 #include <linux/usb/serial.h> 38 39 #include "ti_usb_3410_5052.h" 40 41 /* Defines */ 42 43 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 44 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 45 46 #define TI_FIRMWARE_BUF_SIZE 16284 47 48 #define TI_TRANSFER_TIMEOUT 2 49 50 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 51 52 /* supported setserial flags */ 53 #define TI_SET_SERIAL_FLAGS 0 54 55 /* read urb states */ 56 #define TI_READ_URB_RUNNING 0 57 #define TI_READ_URB_STOPPING 1 58 #define TI_READ_URB_STOPPED 2 59 60 #define TI_EXTRA_VID_PID_COUNT 5 61 62 63 /* Structures */ 64 65 struct ti_port { 66 int tp_is_open; 67 __u8 tp_msr; 68 __u8 tp_shadow_mcr; 69 __u8 tp_uart_mode; /* 232 or 485 modes */ 70 unsigned int tp_uart_base_addr; 71 int tp_flags; 72 struct ti_device *tp_tdev; 73 struct usb_serial_port *tp_port; 74 spinlock_t tp_lock; 75 int tp_read_urb_state; 76 int tp_write_urb_in_use; 77 }; 78 79 struct ti_device { 80 struct mutex td_open_close_lock; 81 int td_open_port_count; 82 struct usb_serial *td_serial; 83 int td_is_3410; 84 int td_urb_error; 85 }; 86 87 88 /* Function Declarations */ 89 90 static int ti_startup(struct usb_serial *serial); 91 static void ti_release(struct usb_serial *serial); 92 static int ti_port_probe(struct usb_serial_port *port); 93 static int ti_port_remove(struct usb_serial_port *port); 94 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port); 95 static void ti_close(struct usb_serial_port *port); 96 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 97 const unsigned char *data, int count); 98 static int ti_write_room(struct tty_struct *tty); 99 static int ti_chars_in_buffer(struct tty_struct *tty); 100 static bool ti_tx_empty(struct usb_serial_port *port); 101 static void ti_throttle(struct tty_struct *tty); 102 static void ti_unthrottle(struct tty_struct *tty); 103 static int ti_ioctl(struct tty_struct *tty, 104 unsigned int cmd, unsigned long arg); 105 static void ti_set_termios(struct tty_struct *tty, 106 struct usb_serial_port *port, struct ktermios *old_termios); 107 static int ti_tiocmget(struct tty_struct *tty); 108 static int ti_tiocmset(struct tty_struct *tty, 109 unsigned int set, unsigned int clear); 110 static void ti_break(struct tty_struct *tty, int break_state); 111 static void ti_interrupt_callback(struct urb *urb); 112 static void ti_bulk_in_callback(struct urb *urb); 113 static void ti_bulk_out_callback(struct urb *urb); 114 115 static void ti_recv(struct usb_serial_port *port, unsigned char *data, 116 int length); 117 static void ti_send(struct ti_port *tport); 118 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 119 static int ti_get_lsr(struct ti_port *tport, u8 *lsr); 120 static int ti_get_serial_info(struct ti_port *tport, 121 struct serial_struct __user *ret_arg); 122 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 123 struct serial_struct __user *new_arg); 124 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 125 126 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 127 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 128 129 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 130 __u16 moduleid, __u16 value, __u8 *data, int size); 131 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 132 __u16 moduleid, __u16 value, __u8 *data, int size); 133 134 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev, 135 unsigned long addr, __u8 mask, __u8 byte); 136 137 static int ti_download_firmware(struct ti_device *tdev); 138 139 140 /* Data */ 141 142 /* module parameters */ 143 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 144 145 /* supported devices */ 146 static struct usb_device_id ti_id_table_3410[] = { 147 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 148 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 149 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 150 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 151 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 152 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 153 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 154 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) }, 155 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) }, 156 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) }, 157 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 158 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 159 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 160 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) }, 161 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) }, 162 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) }, 163 { } /* terminator */ 164 }; 165 166 static struct usb_device_id ti_id_table_5052[] = { 167 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 168 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 169 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 170 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 171 { } /* terminator */ 172 }; 173 174 static struct usb_device_id ti_id_table_combined[] = { 175 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 176 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 177 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 178 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 179 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 180 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 181 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 182 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) }, 183 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) }, 184 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) }, 185 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 186 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 187 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 189 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 190 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 191 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 192 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) }, 193 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) }, 194 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) }, 195 { } /* terminator */ 196 }; 197 198 static struct usb_serial_driver ti_1port_device = { 199 .driver = { 200 .owner = THIS_MODULE, 201 .name = "ti_usb_3410_5052_1", 202 }, 203 .description = "TI USB 3410 1 port adapter", 204 .id_table = ti_id_table_3410, 205 .num_ports = 1, 206 .attach = ti_startup, 207 .release = ti_release, 208 .port_probe = ti_port_probe, 209 .port_remove = ti_port_remove, 210 .open = ti_open, 211 .close = ti_close, 212 .write = ti_write, 213 .write_room = ti_write_room, 214 .chars_in_buffer = ti_chars_in_buffer, 215 .tx_empty = ti_tx_empty, 216 .throttle = ti_throttle, 217 .unthrottle = ti_unthrottle, 218 .ioctl = ti_ioctl, 219 .set_termios = ti_set_termios, 220 .tiocmget = ti_tiocmget, 221 .tiocmset = ti_tiocmset, 222 .tiocmiwait = usb_serial_generic_tiocmiwait, 223 .get_icount = usb_serial_generic_get_icount, 224 .break_ctl = ti_break, 225 .read_int_callback = ti_interrupt_callback, 226 .read_bulk_callback = ti_bulk_in_callback, 227 .write_bulk_callback = ti_bulk_out_callback, 228 }; 229 230 static struct usb_serial_driver ti_2port_device = { 231 .driver = { 232 .owner = THIS_MODULE, 233 .name = "ti_usb_3410_5052_2", 234 }, 235 .description = "TI USB 5052 2 port adapter", 236 .id_table = ti_id_table_5052, 237 .num_ports = 2, 238 .attach = ti_startup, 239 .release = ti_release, 240 .port_probe = ti_port_probe, 241 .port_remove = ti_port_remove, 242 .open = ti_open, 243 .close = ti_close, 244 .write = ti_write, 245 .write_room = ti_write_room, 246 .chars_in_buffer = ti_chars_in_buffer, 247 .tx_empty = ti_tx_empty, 248 .throttle = ti_throttle, 249 .unthrottle = ti_unthrottle, 250 .ioctl = ti_ioctl, 251 .set_termios = ti_set_termios, 252 .tiocmget = ti_tiocmget, 253 .tiocmset = ti_tiocmset, 254 .tiocmiwait = usb_serial_generic_tiocmiwait, 255 .get_icount = usb_serial_generic_get_icount, 256 .break_ctl = ti_break, 257 .read_int_callback = ti_interrupt_callback, 258 .read_bulk_callback = ti_bulk_in_callback, 259 .write_bulk_callback = ti_bulk_out_callback, 260 }; 261 262 static struct usb_serial_driver * const serial_drivers[] = { 263 &ti_1port_device, &ti_2port_device, NULL 264 }; 265 266 /* Module */ 267 268 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 269 MODULE_DESCRIPTION(TI_DRIVER_DESC); 270 MODULE_LICENSE("GPL"); 271 272 MODULE_FIRMWARE("ti_3410.fw"); 273 MODULE_FIRMWARE("ti_5052.fw"); 274 MODULE_FIRMWARE("mts_cdma.fw"); 275 MODULE_FIRMWARE("mts_gsm.fw"); 276 MODULE_FIRMWARE("mts_edge.fw"); 277 MODULE_FIRMWARE("mts_mt9234mu.fw"); 278 MODULE_FIRMWARE("mts_mt9234zba.fw"); 279 280 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 281 MODULE_PARM_DESC(closing_wait, 282 "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 283 284 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 285 286 module_usb_serial_driver(serial_drivers, ti_id_table_combined); 287 288 /* Functions */ 289 290 static int ti_startup(struct usb_serial *serial) 291 { 292 struct ti_device *tdev; 293 struct usb_device *dev = serial->dev; 294 int status; 295 296 dev_dbg(&dev->dev, 297 "%s - product 0x%4X, num configurations %d, configuration value %d", 298 __func__, le16_to_cpu(dev->descriptor.idProduct), 299 dev->descriptor.bNumConfigurations, 300 dev->actconfig->desc.bConfigurationValue); 301 302 /* create device structure */ 303 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 304 if (tdev == NULL) { 305 dev_err(&dev->dev, "%s - out of memory\n", __func__); 306 return -ENOMEM; 307 } 308 mutex_init(&tdev->td_open_close_lock); 309 tdev->td_serial = serial; 310 usb_set_serial_data(serial, tdev); 311 312 /* determine device type */ 313 if (serial->type == &ti_1port_device) 314 tdev->td_is_3410 = 1; 315 dev_dbg(&dev->dev, "%s - device type is %s\n", __func__, 316 tdev->td_is_3410 ? "3410" : "5052"); 317 318 /* if we have only 1 configuration, download firmware */ 319 if (dev->descriptor.bNumConfigurations == 1) { 320 status = ti_download_firmware(tdev); 321 322 if (status != 0) 323 goto free_tdev; 324 325 /* 3410 must be reset, 5052 resets itself */ 326 if (tdev->td_is_3410) { 327 msleep_interruptible(100); 328 usb_reset_device(dev); 329 } 330 331 status = -ENODEV; 332 goto free_tdev; 333 } 334 335 /* the second configuration must be set */ 336 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 337 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG); 338 status = status ? status : -ENODEV; 339 goto free_tdev; 340 } 341 342 return 0; 343 344 free_tdev: 345 kfree(tdev); 346 usb_set_serial_data(serial, NULL); 347 return status; 348 } 349 350 351 static void ti_release(struct usb_serial *serial) 352 { 353 struct ti_device *tdev = usb_get_serial_data(serial); 354 355 kfree(tdev); 356 } 357 358 static int ti_port_probe(struct usb_serial_port *port) 359 { 360 struct ti_port *tport; 361 362 tport = kzalloc(sizeof(*tport), GFP_KERNEL); 363 if (!tport) 364 return -ENOMEM; 365 366 spin_lock_init(&tport->tp_lock); 367 if (port == port->serial->port[0]) 368 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR; 369 else 370 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR; 371 port->port.closing_wait = msecs_to_jiffies(10 * closing_wait); 372 tport->tp_port = port; 373 tport->tp_tdev = usb_get_serial_data(port->serial); 374 tport->tp_uart_mode = 0; /* default is RS232 */ 375 376 usb_set_serial_port_data(port, tport); 377 378 port->port.drain_delay = 3; 379 380 return 0; 381 } 382 383 static int ti_port_remove(struct usb_serial_port *port) 384 { 385 struct ti_port *tport; 386 387 tport = usb_get_serial_port_data(port); 388 kfree(tport); 389 390 return 0; 391 } 392 393 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) 394 { 395 struct ti_port *tport = usb_get_serial_port_data(port); 396 struct ti_device *tdev; 397 struct usb_device *dev; 398 struct urb *urb; 399 int port_number; 400 int status; 401 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 402 TI_PIPE_TIMEOUT_ENABLE | 403 (TI_TRANSFER_TIMEOUT << 2)); 404 405 if (tport == NULL) 406 return -ENODEV; 407 408 dev = port->serial->dev; 409 tdev = tport->tp_tdev; 410 411 /* only one open on any port on a device at a time */ 412 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 413 return -ERESTARTSYS; 414 415 port_number = port->port_number; 416 417 tport->tp_msr = 0; 418 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 419 420 /* start interrupt urb the first time a port is opened on this device */ 421 if (tdev->td_open_port_count == 0) { 422 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__); 423 urb = tdev->td_serial->port[0]->interrupt_in_urb; 424 if (!urb) { 425 dev_err(&port->dev, "%s - no interrupt urb\n", __func__); 426 status = -EINVAL; 427 goto release_lock; 428 } 429 urb->context = tdev; 430 status = usb_submit_urb(urb, GFP_KERNEL); 431 if (status) { 432 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status); 433 goto release_lock; 434 } 435 } 436 437 if (tty) 438 ti_set_termios(tty, port, &tty->termios); 439 440 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__); 441 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 442 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 443 if (status) { 444 dev_err(&port->dev, "%s - cannot send open command, %d\n", 445 __func__, status); 446 goto unlink_int_urb; 447 } 448 449 dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__); 450 status = ti_command_out_sync(tdev, TI_START_PORT, 451 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 452 if (status) { 453 dev_err(&port->dev, "%s - cannot send start command, %d\n", 454 __func__, status); 455 goto unlink_int_urb; 456 } 457 458 dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__); 459 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 460 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 461 if (status) { 462 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 463 __func__, status); 464 goto unlink_int_urb; 465 } 466 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 467 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 468 if (status) { 469 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 470 __func__, status); 471 goto unlink_int_urb; 472 } 473 474 /* reset the data toggle on the bulk endpoints to work around bug in 475 * host controllers where things get out of sync some times */ 476 usb_clear_halt(dev, port->write_urb->pipe); 477 usb_clear_halt(dev, port->read_urb->pipe); 478 479 if (tty) 480 ti_set_termios(tty, port, &tty->termios); 481 482 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__); 483 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 484 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 485 if (status) { 486 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 487 __func__, status); 488 goto unlink_int_urb; 489 } 490 491 dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__); 492 status = ti_command_out_sync(tdev, TI_START_PORT, 493 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 494 if (status) { 495 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 496 __func__, status); 497 goto unlink_int_urb; 498 } 499 500 /* start read urb */ 501 dev_dbg(&port->dev, "%s - start read urb\n", __func__); 502 urb = port->read_urb; 503 if (!urb) { 504 dev_err(&port->dev, "%s - no read urb\n", __func__); 505 status = -EINVAL; 506 goto unlink_int_urb; 507 } 508 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 509 urb->context = tport; 510 status = usb_submit_urb(urb, GFP_KERNEL); 511 if (status) { 512 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 513 __func__, status); 514 goto unlink_int_urb; 515 } 516 517 tport->tp_is_open = 1; 518 ++tdev->td_open_port_count; 519 520 goto release_lock; 521 522 unlink_int_urb: 523 if (tdev->td_open_port_count == 0) 524 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 525 release_lock: 526 mutex_unlock(&tdev->td_open_close_lock); 527 dev_dbg(&port->dev, "%s - exit %d\n", __func__, status); 528 return status; 529 } 530 531 532 static void ti_close(struct usb_serial_port *port) 533 { 534 struct ti_device *tdev; 535 struct ti_port *tport; 536 int port_number; 537 int status; 538 int do_unlock; 539 unsigned long flags; 540 541 tdev = usb_get_serial_data(port->serial); 542 tport = usb_get_serial_port_data(port); 543 if (tdev == NULL || tport == NULL) 544 return; 545 546 tport->tp_is_open = 0; 547 548 usb_kill_urb(port->read_urb); 549 usb_kill_urb(port->write_urb); 550 tport->tp_write_urb_in_use = 0; 551 spin_lock_irqsave(&tport->tp_lock, flags); 552 kfifo_reset_out(&port->write_fifo); 553 spin_unlock_irqrestore(&tport->tp_lock, flags); 554 555 port_number = port->port_number; 556 557 dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__); 558 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 559 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 560 if (status) 561 dev_err(&port->dev, 562 "%s - cannot send close port command, %d\n" 563 , __func__, status); 564 565 /* if mutex_lock is interrupted, continue anyway */ 566 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 567 --tport->tp_tdev->td_open_port_count; 568 if (tport->tp_tdev->td_open_port_count <= 0) { 569 /* last port is closed, shut down interrupt urb */ 570 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 571 tport->tp_tdev->td_open_port_count = 0; 572 } 573 if (do_unlock) 574 mutex_unlock(&tdev->td_open_close_lock); 575 } 576 577 578 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 579 const unsigned char *data, int count) 580 { 581 struct ti_port *tport = usb_get_serial_port_data(port); 582 583 if (count == 0) { 584 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 585 return 0; 586 } 587 588 if (tport == NULL || !tport->tp_is_open) 589 return -ENODEV; 590 591 count = kfifo_in_locked(&port->write_fifo, data, count, 592 &tport->tp_lock); 593 ti_send(tport); 594 595 return count; 596 } 597 598 599 static int ti_write_room(struct tty_struct *tty) 600 { 601 struct usb_serial_port *port = tty->driver_data; 602 struct ti_port *tport = usb_get_serial_port_data(port); 603 int room = 0; 604 unsigned long flags; 605 606 if (tport == NULL) 607 return 0; 608 609 spin_lock_irqsave(&tport->tp_lock, flags); 610 room = kfifo_avail(&port->write_fifo); 611 spin_unlock_irqrestore(&tport->tp_lock, flags); 612 613 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 614 return room; 615 } 616 617 618 static int ti_chars_in_buffer(struct tty_struct *tty) 619 { 620 struct usb_serial_port *port = tty->driver_data; 621 struct ti_port *tport = usb_get_serial_port_data(port); 622 int chars = 0; 623 unsigned long flags; 624 625 if (tport == NULL) 626 return 0; 627 628 spin_lock_irqsave(&tport->tp_lock, flags); 629 chars = kfifo_len(&port->write_fifo); 630 spin_unlock_irqrestore(&tport->tp_lock, flags); 631 632 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 633 return chars; 634 } 635 636 static bool ti_tx_empty(struct usb_serial_port *port) 637 { 638 struct ti_port *tport = usb_get_serial_port_data(port); 639 int ret; 640 u8 lsr; 641 642 ret = ti_get_lsr(tport, &lsr); 643 if (!ret && !(lsr & TI_LSR_TX_EMPTY)) 644 return false; 645 646 return true; 647 } 648 649 static void ti_throttle(struct tty_struct *tty) 650 { 651 struct usb_serial_port *port = tty->driver_data; 652 struct ti_port *tport = usb_get_serial_port_data(port); 653 654 if (tport == NULL) 655 return; 656 657 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 658 ti_stop_read(tport, tty); 659 660 } 661 662 663 static void ti_unthrottle(struct tty_struct *tty) 664 { 665 struct usb_serial_port *port = tty->driver_data; 666 struct ti_port *tport = usb_get_serial_port_data(port); 667 int status; 668 669 if (tport == NULL) 670 return; 671 672 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 673 status = ti_restart_read(tport, tty); 674 if (status) 675 dev_err(&port->dev, "%s - cannot restart read, %d\n", 676 __func__, status); 677 } 678 } 679 680 static int ti_ioctl(struct tty_struct *tty, 681 unsigned int cmd, unsigned long arg) 682 { 683 struct usb_serial_port *port = tty->driver_data; 684 struct ti_port *tport = usb_get_serial_port_data(port); 685 686 dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd); 687 688 if (tport == NULL) 689 return -ENODEV; 690 691 switch (cmd) { 692 case TIOCGSERIAL: 693 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__); 694 return ti_get_serial_info(tport, 695 (struct serial_struct __user *)arg); 696 case TIOCSSERIAL: 697 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__); 698 return ti_set_serial_info(tty, tport, 699 (struct serial_struct __user *)arg); 700 } 701 return -ENOIOCTLCMD; 702 } 703 704 705 static void ti_set_termios(struct tty_struct *tty, 706 struct usb_serial_port *port, struct ktermios *old_termios) 707 { 708 struct ti_port *tport = usb_get_serial_port_data(port); 709 struct ti_uart_config *config; 710 tcflag_t cflag, iflag; 711 int baud; 712 int status; 713 int port_number = port->port_number; 714 unsigned int mcr; 715 716 cflag = tty->termios.c_cflag; 717 iflag = tty->termios.c_iflag; 718 719 dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag); 720 dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__, 721 old_termios->c_cflag, old_termios->c_iflag); 722 723 if (tport == NULL) 724 return; 725 726 config = kmalloc(sizeof(*config), GFP_KERNEL); 727 if (!config) { 728 dev_err(&port->dev, "%s - out of memory\n", __func__); 729 return; 730 } 731 732 config->wFlags = 0; 733 734 /* these flags must be set */ 735 config->wFlags |= TI_UART_ENABLE_MS_INTS; 736 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 737 config->bUartMode = (__u8)(tport->tp_uart_mode); 738 739 switch (cflag & CSIZE) { 740 case CS5: 741 config->bDataBits = TI_UART_5_DATA_BITS; 742 break; 743 case CS6: 744 config->bDataBits = TI_UART_6_DATA_BITS; 745 break; 746 case CS7: 747 config->bDataBits = TI_UART_7_DATA_BITS; 748 break; 749 default: 750 case CS8: 751 config->bDataBits = TI_UART_8_DATA_BITS; 752 break; 753 } 754 755 /* CMSPAR isn't supported by this driver */ 756 tty->termios.c_cflag &= ~CMSPAR; 757 758 if (cflag & PARENB) { 759 if (cflag & PARODD) { 760 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 761 config->bParity = TI_UART_ODD_PARITY; 762 } else { 763 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 764 config->bParity = TI_UART_EVEN_PARITY; 765 } 766 } else { 767 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 768 config->bParity = TI_UART_NO_PARITY; 769 } 770 771 if (cflag & CSTOPB) 772 config->bStopBits = TI_UART_2_STOP_BITS; 773 else 774 config->bStopBits = TI_UART_1_STOP_BITS; 775 776 if (cflag & CRTSCTS) { 777 /* RTS flow control must be off to drop RTS for baud rate B0 */ 778 if ((cflag & CBAUD) != B0) 779 config->wFlags |= TI_UART_ENABLE_RTS_IN; 780 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 781 } else { 782 tty->hw_stopped = 0; 783 ti_restart_read(tport, tty); 784 } 785 786 if (I_IXOFF(tty) || I_IXON(tty)) { 787 config->cXon = START_CHAR(tty); 788 config->cXoff = STOP_CHAR(tty); 789 790 if (I_IXOFF(tty)) 791 config->wFlags |= TI_UART_ENABLE_X_IN; 792 else 793 ti_restart_read(tport, tty); 794 795 if (I_IXON(tty)) 796 config->wFlags |= TI_UART_ENABLE_X_OUT; 797 } 798 799 baud = tty_get_baud_rate(tty); 800 if (!baud) 801 baud = 9600; 802 if (tport->tp_tdev->td_is_3410) 803 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 804 else 805 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 806 807 /* FIXME: Should calculate resulting baud here and report it back */ 808 if ((cflag & CBAUD) != B0) 809 tty_encode_baud_rate(tty, baud, baud); 810 811 dev_dbg(&port->dev, 812 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 813 __func__, baud, config->wBaudRate, config->wFlags, 814 config->bDataBits, config->bParity, config->bStopBits, 815 config->cXon, config->cXoff, config->bUartMode); 816 817 cpu_to_be16s(&config->wBaudRate); 818 cpu_to_be16s(&config->wFlags); 819 820 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 821 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 822 sizeof(*config)); 823 if (status) 824 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 825 __func__, port_number, status); 826 827 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 828 mcr = tport->tp_shadow_mcr; 829 /* if baud rate is B0, clear RTS and DTR */ 830 if ((cflag & CBAUD) == B0) 831 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 832 status = ti_set_mcr(tport, mcr); 833 if (status) 834 dev_err(&port->dev, 835 "%s - cannot set modem control on port %d, %d\n", 836 __func__, port_number, status); 837 838 kfree(config); 839 } 840 841 842 static int ti_tiocmget(struct tty_struct *tty) 843 { 844 struct usb_serial_port *port = tty->driver_data; 845 struct ti_port *tport = usb_get_serial_port_data(port); 846 unsigned int result; 847 unsigned int msr; 848 unsigned int mcr; 849 unsigned long flags; 850 851 if (tport == NULL) 852 return -ENODEV; 853 854 spin_lock_irqsave(&tport->tp_lock, flags); 855 msr = tport->tp_msr; 856 mcr = tport->tp_shadow_mcr; 857 spin_unlock_irqrestore(&tport->tp_lock, flags); 858 859 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 860 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 861 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 862 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 863 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 864 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 865 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 866 867 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 868 869 return result; 870 } 871 872 873 static int ti_tiocmset(struct tty_struct *tty, 874 unsigned int set, unsigned int clear) 875 { 876 struct usb_serial_port *port = tty->driver_data; 877 struct ti_port *tport = usb_get_serial_port_data(port); 878 unsigned int mcr; 879 unsigned long flags; 880 881 if (tport == NULL) 882 return -ENODEV; 883 884 spin_lock_irqsave(&tport->tp_lock, flags); 885 mcr = tport->tp_shadow_mcr; 886 887 if (set & TIOCM_RTS) 888 mcr |= TI_MCR_RTS; 889 if (set & TIOCM_DTR) 890 mcr |= TI_MCR_DTR; 891 if (set & TIOCM_LOOP) 892 mcr |= TI_MCR_LOOP; 893 894 if (clear & TIOCM_RTS) 895 mcr &= ~TI_MCR_RTS; 896 if (clear & TIOCM_DTR) 897 mcr &= ~TI_MCR_DTR; 898 if (clear & TIOCM_LOOP) 899 mcr &= ~TI_MCR_LOOP; 900 spin_unlock_irqrestore(&tport->tp_lock, flags); 901 902 return ti_set_mcr(tport, mcr); 903 } 904 905 906 static void ti_break(struct tty_struct *tty, int break_state) 907 { 908 struct usb_serial_port *port = tty->driver_data; 909 struct ti_port *tport = usb_get_serial_port_data(port); 910 int status; 911 912 dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state); 913 914 if (tport == NULL) 915 return; 916 917 status = ti_write_byte(port, tport->tp_tdev, 918 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 919 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 920 921 if (status) 922 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status); 923 } 924 925 926 static void ti_interrupt_callback(struct urb *urb) 927 { 928 struct ti_device *tdev = urb->context; 929 struct usb_serial_port *port; 930 struct usb_serial *serial = tdev->td_serial; 931 struct ti_port *tport; 932 struct device *dev = &urb->dev->dev; 933 unsigned char *data = urb->transfer_buffer; 934 int length = urb->actual_length; 935 int port_number; 936 int function; 937 int status = urb->status; 938 int retval; 939 __u8 msr; 940 941 switch (status) { 942 case 0: 943 break; 944 case -ECONNRESET: 945 case -ENOENT: 946 case -ESHUTDOWN: 947 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status); 948 tdev->td_urb_error = 1; 949 return; 950 default: 951 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status); 952 tdev->td_urb_error = 1; 953 goto exit; 954 } 955 956 if (length != 2) { 957 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length); 958 goto exit; 959 } 960 961 if (data[0] == TI_CODE_HARDWARE_ERROR) { 962 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 963 goto exit; 964 } 965 966 port_number = TI_GET_PORT_FROM_CODE(data[0]); 967 function = TI_GET_FUNC_FROM_CODE(data[0]); 968 969 dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n", 970 __func__, port_number, function, data[1]); 971 972 if (port_number >= serial->num_ports) { 973 dev_err(dev, "%s - bad port number, %d\n", 974 __func__, port_number); 975 goto exit; 976 } 977 978 port = serial->port[port_number]; 979 980 tport = usb_get_serial_port_data(port); 981 if (!tport) 982 goto exit; 983 984 switch (function) { 985 case TI_CODE_DATA_ERROR: 986 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 987 __func__, port_number, data[1]); 988 break; 989 990 case TI_CODE_MODEM_STATUS: 991 msr = data[1]; 992 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr); 993 ti_handle_new_msr(tport, msr); 994 break; 995 996 default: 997 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 998 __func__, data[1]); 999 break; 1000 } 1001 1002 exit: 1003 retval = usb_submit_urb(urb, GFP_ATOMIC); 1004 if (retval) 1005 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1006 __func__, retval); 1007 } 1008 1009 1010 static void ti_bulk_in_callback(struct urb *urb) 1011 { 1012 struct ti_port *tport = urb->context; 1013 struct usb_serial_port *port = tport->tp_port; 1014 struct device *dev = &urb->dev->dev; 1015 int status = urb->status; 1016 int retval = 0; 1017 1018 switch (status) { 1019 case 0: 1020 break; 1021 case -ECONNRESET: 1022 case -ENOENT: 1023 case -ESHUTDOWN: 1024 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status); 1025 tport->tp_tdev->td_urb_error = 1; 1026 return; 1027 default: 1028 dev_err(dev, "%s - nonzero urb status, %d\n", 1029 __func__, status); 1030 tport->tp_tdev->td_urb_error = 1; 1031 } 1032 1033 if (status == -EPIPE) 1034 goto exit; 1035 1036 if (status) { 1037 dev_err(dev, "%s - stopping read!\n", __func__); 1038 return; 1039 } 1040 1041 if (urb->actual_length) { 1042 usb_serial_debug_data(dev, __func__, urb->actual_length, 1043 urb->transfer_buffer); 1044 1045 if (!tport->tp_is_open) 1046 dev_dbg(dev, "%s - port closed, dropping data\n", 1047 __func__); 1048 else 1049 ti_recv(port, urb->transfer_buffer, urb->actual_length); 1050 spin_lock(&tport->tp_lock); 1051 port->icount.rx += urb->actual_length; 1052 spin_unlock(&tport->tp_lock); 1053 } 1054 1055 exit: 1056 /* continue to read unless stopping */ 1057 spin_lock(&tport->tp_lock); 1058 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1059 retval = usb_submit_urb(urb, GFP_ATOMIC); 1060 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) 1061 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1062 1063 spin_unlock(&tport->tp_lock); 1064 if (retval) 1065 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1066 __func__, retval); 1067 } 1068 1069 1070 static void ti_bulk_out_callback(struct urb *urb) 1071 { 1072 struct ti_port *tport = urb->context; 1073 struct usb_serial_port *port = tport->tp_port; 1074 int status = urb->status; 1075 1076 tport->tp_write_urb_in_use = 0; 1077 1078 switch (status) { 1079 case 0: 1080 break; 1081 case -ECONNRESET: 1082 case -ENOENT: 1083 case -ESHUTDOWN: 1084 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status); 1085 tport->tp_tdev->td_urb_error = 1; 1086 return; 1087 default: 1088 dev_err_console(port, "%s - nonzero urb status, %d\n", 1089 __func__, status); 1090 tport->tp_tdev->td_urb_error = 1; 1091 } 1092 1093 /* send any buffered data */ 1094 ti_send(tport); 1095 } 1096 1097 1098 static void ti_recv(struct usb_serial_port *port, unsigned char *data, 1099 int length) 1100 { 1101 int cnt; 1102 1103 do { 1104 cnt = tty_insert_flip_string(&port->port, data, length); 1105 if (cnt < length) { 1106 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1107 __func__, length - cnt); 1108 if (cnt == 0) 1109 break; 1110 } 1111 tty_flip_buffer_push(&port->port); 1112 data += cnt; 1113 length -= cnt; 1114 } while (length > 0); 1115 } 1116 1117 1118 static void ti_send(struct ti_port *tport) 1119 { 1120 int count, result; 1121 struct usb_serial_port *port = tport->tp_port; 1122 unsigned long flags; 1123 1124 spin_lock_irqsave(&tport->tp_lock, flags); 1125 1126 if (tport->tp_write_urb_in_use) 1127 goto unlock; 1128 1129 count = kfifo_out(&port->write_fifo, 1130 port->write_urb->transfer_buffer, 1131 port->bulk_out_size); 1132 1133 if (count == 0) 1134 goto unlock; 1135 1136 tport->tp_write_urb_in_use = 1; 1137 1138 spin_unlock_irqrestore(&tport->tp_lock, flags); 1139 1140 usb_serial_debug_data(&port->dev, __func__, count, 1141 port->write_urb->transfer_buffer); 1142 1143 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1144 usb_sndbulkpipe(port->serial->dev, 1145 port->bulk_out_endpointAddress), 1146 port->write_urb->transfer_buffer, count, 1147 ti_bulk_out_callback, tport); 1148 1149 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1150 if (result) { 1151 dev_err_console(port, "%s - submit write urb failed, %d\n", 1152 __func__, result); 1153 tport->tp_write_urb_in_use = 0; 1154 /* TODO: reschedule ti_send */ 1155 } else { 1156 spin_lock_irqsave(&tport->tp_lock, flags); 1157 port->icount.tx += count; 1158 spin_unlock_irqrestore(&tport->tp_lock, flags); 1159 } 1160 1161 /* more room in the buffer for new writes, wakeup */ 1162 tty_port_tty_wakeup(&port->port); 1163 1164 return; 1165 unlock: 1166 spin_unlock_irqrestore(&tport->tp_lock, flags); 1167 return; 1168 } 1169 1170 1171 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1172 { 1173 unsigned long flags; 1174 int status; 1175 1176 status = ti_write_byte(tport->tp_port, tport->tp_tdev, 1177 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1178 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1179 1180 spin_lock_irqsave(&tport->tp_lock, flags); 1181 if (!status) 1182 tport->tp_shadow_mcr = mcr; 1183 spin_unlock_irqrestore(&tport->tp_lock, flags); 1184 1185 return status; 1186 } 1187 1188 1189 static int ti_get_lsr(struct ti_port *tport, u8 *lsr) 1190 { 1191 int size, status; 1192 struct ti_device *tdev = tport->tp_tdev; 1193 struct usb_serial_port *port = tport->tp_port; 1194 int port_number = port->port_number; 1195 struct ti_port_status *data; 1196 1197 size = sizeof(struct ti_port_status); 1198 data = kmalloc(size, GFP_KERNEL); 1199 if (!data) { 1200 dev_err(&port->dev, "%s - out of memory\n", __func__); 1201 return -ENOMEM; 1202 } 1203 1204 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1205 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1206 if (status) { 1207 dev_err(&port->dev, 1208 "%s - get port status command failed, %d\n", 1209 __func__, status); 1210 goto free_data; 1211 } 1212 1213 dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR); 1214 1215 *lsr = data->bLSR; 1216 1217 free_data: 1218 kfree(data); 1219 return status; 1220 } 1221 1222 1223 static int ti_get_serial_info(struct ti_port *tport, 1224 struct serial_struct __user *ret_arg) 1225 { 1226 struct usb_serial_port *port = tport->tp_port; 1227 struct serial_struct ret_serial; 1228 unsigned cwait; 1229 1230 if (!ret_arg) 1231 return -EFAULT; 1232 1233 cwait = port->port.closing_wait; 1234 if (cwait != ASYNC_CLOSING_WAIT_NONE) 1235 cwait = jiffies_to_msecs(cwait) / 10; 1236 1237 memset(&ret_serial, 0, sizeof(ret_serial)); 1238 1239 ret_serial.type = PORT_16550A; 1240 ret_serial.line = port->minor; 1241 ret_serial.port = port->port_number; 1242 ret_serial.flags = tport->tp_flags; 1243 ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo); 1244 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1245 ret_serial.closing_wait = cwait; 1246 1247 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1248 return -EFAULT; 1249 1250 return 0; 1251 } 1252 1253 1254 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1255 struct serial_struct __user *new_arg) 1256 { 1257 struct serial_struct new_serial; 1258 unsigned cwait; 1259 1260 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1261 return -EFAULT; 1262 1263 cwait = new_serial.closing_wait; 1264 if (cwait != ASYNC_CLOSING_WAIT_NONE) 1265 cwait = msecs_to_jiffies(10 * new_serial.closing_wait); 1266 1267 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1268 tport->tp_port->port.closing_wait = cwait; 1269 1270 return 0; 1271 } 1272 1273 1274 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1275 { 1276 struct async_icount *icount; 1277 struct tty_struct *tty; 1278 unsigned long flags; 1279 1280 dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr); 1281 1282 if (msr & TI_MSR_DELTA_MASK) { 1283 spin_lock_irqsave(&tport->tp_lock, flags); 1284 icount = &tport->tp_port->icount; 1285 if (msr & TI_MSR_DELTA_CTS) 1286 icount->cts++; 1287 if (msr & TI_MSR_DELTA_DSR) 1288 icount->dsr++; 1289 if (msr & TI_MSR_DELTA_CD) 1290 icount->dcd++; 1291 if (msr & TI_MSR_DELTA_RI) 1292 icount->rng++; 1293 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait); 1294 spin_unlock_irqrestore(&tport->tp_lock, flags); 1295 } 1296 1297 tport->tp_msr = msr & TI_MSR_MASK; 1298 1299 /* handle CTS flow control */ 1300 tty = tty_port_tty_get(&tport->tp_port->port); 1301 if (tty && C_CRTSCTS(tty)) { 1302 if (msr & TI_MSR_CTS) { 1303 tty->hw_stopped = 0; 1304 tty_wakeup(tty); 1305 } else { 1306 tty->hw_stopped = 1; 1307 } 1308 } 1309 tty_kref_put(tty); 1310 } 1311 1312 1313 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1314 { 1315 unsigned long flags; 1316 1317 spin_lock_irqsave(&tport->tp_lock, flags); 1318 1319 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1320 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1321 1322 spin_unlock_irqrestore(&tport->tp_lock, flags); 1323 } 1324 1325 1326 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1327 { 1328 struct urb *urb; 1329 int status = 0; 1330 unsigned long flags; 1331 1332 spin_lock_irqsave(&tport->tp_lock, flags); 1333 1334 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1335 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1336 urb = tport->tp_port->read_urb; 1337 spin_unlock_irqrestore(&tport->tp_lock, flags); 1338 urb->context = tport; 1339 status = usb_submit_urb(urb, GFP_KERNEL); 1340 } else { 1341 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1342 spin_unlock_irqrestore(&tport->tp_lock, flags); 1343 } 1344 1345 return status; 1346 } 1347 1348 1349 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1350 __u16 moduleid, __u16 value, __u8 *data, int size) 1351 { 1352 int status; 1353 1354 status = usb_control_msg(tdev->td_serial->dev, 1355 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1356 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1357 value, moduleid, data, size, 1000); 1358 1359 if (status == size) 1360 status = 0; 1361 1362 if (status > 0) 1363 status = -ECOMM; 1364 1365 return status; 1366 } 1367 1368 1369 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1370 __u16 moduleid, __u16 value, __u8 *data, int size) 1371 { 1372 int status; 1373 1374 status = usb_control_msg(tdev->td_serial->dev, 1375 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1376 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1377 value, moduleid, data, size, 1000); 1378 1379 if (status == size) 1380 status = 0; 1381 1382 if (status > 0) 1383 status = -ECOMM; 1384 1385 return status; 1386 } 1387 1388 1389 static int ti_write_byte(struct usb_serial_port *port, 1390 struct ti_device *tdev, unsigned long addr, 1391 __u8 mask, __u8 byte) 1392 { 1393 int status; 1394 unsigned int size; 1395 struct ti_write_data_bytes *data; 1396 1397 dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__, 1398 addr, mask, byte); 1399 1400 size = sizeof(struct ti_write_data_bytes) + 2; 1401 data = kmalloc(size, GFP_KERNEL); 1402 if (!data) { 1403 dev_err(&port->dev, "%s - out of memory\n", __func__); 1404 return -ENOMEM; 1405 } 1406 1407 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1408 data->bDataType = TI_RW_DATA_BYTE; 1409 data->bDataCounter = 1; 1410 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1411 data->wBaseAddrLo = cpu_to_be16(addr); 1412 data->bData[0] = mask; 1413 data->bData[1] = byte; 1414 1415 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1416 (__u8 *)data, size); 1417 1418 if (status < 0) 1419 dev_err(&port->dev, "%s - failed, %d\n", __func__, status); 1420 1421 kfree(data); 1422 1423 return status; 1424 } 1425 1426 static int ti_do_download(struct usb_device *dev, int pipe, 1427 u8 *buffer, int size) 1428 { 1429 int pos; 1430 u8 cs = 0; 1431 int done; 1432 struct ti_firmware_header *header; 1433 int status = 0; 1434 int len; 1435 1436 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1437 cs = (__u8)(cs + buffer[pos]); 1438 1439 header = (struct ti_firmware_header *)buffer; 1440 header->wLength = cpu_to_le16((__u16)(size 1441 - sizeof(struct ti_firmware_header))); 1442 header->bCheckSum = cs; 1443 1444 dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__); 1445 for (pos = 0; pos < size; pos += done) { 1446 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1447 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1448 &done, 1000); 1449 if (status) 1450 break; 1451 } 1452 return status; 1453 } 1454 1455 static int ti_download_firmware(struct ti_device *tdev) 1456 { 1457 int status; 1458 int buffer_size; 1459 __u8 *buffer; 1460 struct usb_device *dev = tdev->td_serial->dev; 1461 unsigned int pipe = usb_sndbulkpipe(dev, 1462 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1463 const struct firmware *fw_p; 1464 char buf[32]; 1465 1466 /* try ID specific firmware first, then try generic firmware */ 1467 sprintf(buf, "ti_usb-v%04x-p%04x.fw", 1468 le16_to_cpu(dev->descriptor.idVendor), 1469 le16_to_cpu(dev->descriptor.idProduct)); 1470 status = request_firmware(&fw_p, buf, &dev->dev); 1471 1472 if (status != 0) { 1473 buf[0] = '\0'; 1474 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) { 1475 switch (le16_to_cpu(dev->descriptor.idProduct)) { 1476 case MTS_CDMA_PRODUCT_ID: 1477 strcpy(buf, "mts_cdma.fw"); 1478 break; 1479 case MTS_GSM_PRODUCT_ID: 1480 strcpy(buf, "mts_gsm.fw"); 1481 break; 1482 case MTS_EDGE_PRODUCT_ID: 1483 strcpy(buf, "mts_edge.fw"); 1484 break; 1485 case MTS_MT9234MU_PRODUCT_ID: 1486 strcpy(buf, "mts_mt9234mu.fw"); 1487 break; 1488 case MTS_MT9234ZBA_PRODUCT_ID: 1489 strcpy(buf, "mts_mt9234zba.fw"); 1490 break; 1491 case MTS_MT9234ZBAOLD_PRODUCT_ID: 1492 strcpy(buf, "mts_mt9234zba.fw"); 1493 break; } 1494 } 1495 if (buf[0] == '\0') { 1496 if (tdev->td_is_3410) 1497 strcpy(buf, "ti_3410.fw"); 1498 else 1499 strcpy(buf, "ti_5052.fw"); 1500 } 1501 status = request_firmware(&fw_p, buf, &dev->dev); 1502 } 1503 if (status) { 1504 dev_err(&dev->dev, "%s - firmware not found\n", __func__); 1505 return -ENOENT; 1506 } 1507 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) { 1508 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size); 1509 release_firmware(fw_p); 1510 return -ENOENT; 1511 } 1512 1513 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1514 buffer = kmalloc(buffer_size, GFP_KERNEL); 1515 if (buffer) { 1516 memcpy(buffer, fw_p->data, fw_p->size); 1517 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1518 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1519 kfree(buffer); 1520 } else { 1521 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__); 1522 status = -ENOMEM; 1523 } 1524 release_firmware(fw_p); 1525 if (status) { 1526 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1527 __func__, status); 1528 return status; 1529 } 1530 1531 dev_dbg(&dev->dev, "%s - download successful\n", __func__); 1532 1533 return 0; 1534 } 1535