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 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052 21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device 22 * configuration. 23 * 24 * #!/bin/bash 25 * 26 * BOOT_CONFIG=1 27 * ACTIVE_CONFIG=2 28 * 29 * if [[ "$ACTION" != "add" ]] 30 * then 31 * exit 32 * fi 33 * 34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue 35 * 36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]] 37 * then 38 * exit 39 * fi 40 * 41 * PRODUCT=${PRODUCT%/?*} # delete version 42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}` 43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}` 44 * 45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters 46 * 47 * function scan() { 48 * s=$1 49 * shift 50 * for i 51 * do 52 * if [[ $s -eq $i ]] 53 * then 54 * return 0 55 * fi 56 * done 57 * return 1 58 * } 59 * 60 * IFS=$IFS, 61 * 62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` && 63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) || 64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` && 65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`) 66 * then 67 * echo $ACTIVE_CONFIG > $CONFIG_PATH 68 * fi 69 */ 70 71 #include <linux/kernel.h> 72 #include <linux/errno.h> 73 #include <linux/firmware.h> 74 #include <linux/init.h> 75 #include <linux/slab.h> 76 #include <linux/tty.h> 77 #include <linux/tty_driver.h> 78 #include <linux/tty_flip.h> 79 #include <linux/module.h> 80 #include <linux/spinlock.h> 81 #include <linux/ioctl.h> 82 #include <linux/serial.h> 83 #include <linux/circ_buf.h> 84 #include <linux/mutex.h> 85 #include <linux/uaccess.h> 86 #include <linux/usb.h> 87 #include <linux/usb/serial.h> 88 89 #include "ti_usb_3410_5052.h" 90 91 /* Defines */ 92 93 #define TI_DRIVER_VERSION "v0.9" 94 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 95 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 96 97 #define TI_FIRMWARE_BUF_SIZE 16284 98 99 #define TI_WRITE_BUF_SIZE 1024 100 101 #define TI_TRANSFER_TIMEOUT 2 102 103 #define TI_DEFAULT_LOW_LATENCY 0 104 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 105 106 /* supported setserial flags */ 107 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY) 108 109 /* read urb states */ 110 #define TI_READ_URB_RUNNING 0 111 #define TI_READ_URB_STOPPING 1 112 #define TI_READ_URB_STOPPED 2 113 114 #define TI_EXTRA_VID_PID_COUNT 5 115 116 117 /* Structures */ 118 119 struct ti_port { 120 int tp_is_open; 121 __u8 tp_msr; 122 __u8 tp_lsr; 123 __u8 tp_shadow_mcr; 124 __u8 tp_uart_mode; /* 232 or 485 modes */ 125 unsigned int tp_uart_base_addr; 126 int tp_flags; 127 int tp_closing_wait;/* in .01 secs */ 128 struct async_icount tp_icount; 129 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 130 wait_queue_head_t tp_write_wait; 131 struct ti_device *tp_tdev; 132 struct usb_serial_port *tp_port; 133 spinlock_t tp_lock; 134 int tp_read_urb_state; 135 int tp_write_urb_in_use; 136 struct circ_buf *tp_write_buf; 137 }; 138 139 struct ti_device { 140 struct mutex td_open_close_lock; 141 int td_open_port_count; 142 struct usb_serial *td_serial; 143 int td_is_3410; 144 int td_urb_error; 145 }; 146 147 148 /* Function Declarations */ 149 150 static int ti_startup(struct usb_serial *serial); 151 static void ti_shutdown(struct usb_serial *serial); 152 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port, 153 struct file *file); 154 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port, 155 struct file *file); 156 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 157 const unsigned char *data, int count); 158 static int ti_write_room(struct tty_struct *tty); 159 static int ti_chars_in_buffer(struct tty_struct *tty); 160 static void ti_throttle(struct tty_struct *tty); 161 static void ti_unthrottle(struct tty_struct *tty); 162 static int ti_ioctl(struct tty_struct *tty, struct file *file, 163 unsigned int cmd, unsigned long arg); 164 static void ti_set_termios(struct tty_struct *tty, 165 struct usb_serial_port *port, struct ktermios *old_termios); 166 static int ti_tiocmget(struct tty_struct *tty, struct file *file); 167 static int ti_tiocmset(struct tty_struct *tty, struct file *file, 168 unsigned int set, unsigned int clear); 169 static void ti_break(struct tty_struct *tty, int break_state); 170 static void ti_interrupt_callback(struct urb *urb); 171 static void ti_bulk_in_callback(struct urb *urb); 172 static void ti_bulk_out_callback(struct urb *urb); 173 174 static void ti_recv(struct device *dev, struct tty_struct *tty, 175 unsigned char *data, int length); 176 static void ti_send(struct ti_port *tport); 177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 178 static int ti_get_lsr(struct ti_port *tport); 179 static int ti_get_serial_info(struct ti_port *tport, 180 struct serial_struct __user *ret_arg); 181 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 182 struct serial_struct __user *new_arg); 183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 184 185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 186 187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 189 190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 191 __u16 moduleid, __u16 value, __u8 *data, int size); 192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 193 __u16 moduleid, __u16 value, __u8 *data, int size); 194 195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 196 __u8 mask, __u8 byte); 197 198 static int ti_download_firmware(struct ti_device *tdev, int type); 199 200 /* circular buffer */ 201 static struct circ_buf *ti_buf_alloc(void); 202 static void ti_buf_free(struct circ_buf *cb); 203 static void ti_buf_clear(struct circ_buf *cb); 204 static int ti_buf_data_avail(struct circ_buf *cb); 205 static int ti_buf_space_avail(struct circ_buf *cb); 206 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count); 207 static int ti_buf_get(struct circ_buf *cb, char *buf, int count); 208 209 210 /* Data */ 211 212 /* module parameters */ 213 static int debug; 214 static int low_latency = TI_DEFAULT_LOW_LATENCY; 215 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 216 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT]; 217 static unsigned int vendor_3410_count; 218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT]; 219 static unsigned int product_3410_count; 220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT]; 221 static unsigned int vendor_5052_count; 222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT]; 223 static unsigned int product_5052_count; 224 225 /* supported devices */ 226 /* the array dimension is the number of default entries plus */ 227 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */ 228 /* null entry */ 229 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = { 230 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 232 }; 233 234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = { 235 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 236 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 237 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 239 }; 240 241 static struct usb_device_id ti_id_table_combined[] = { 242 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 244 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 245 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 248 { } 249 }; 250 251 static struct usb_driver ti_usb_driver = { 252 .name = "ti_usb_3410_5052", 253 .probe = usb_serial_probe, 254 .disconnect = usb_serial_disconnect, 255 .id_table = ti_id_table_combined, 256 .no_dynamic_id = 1, 257 }; 258 259 static struct usb_serial_driver ti_1port_device = { 260 .driver = { 261 .owner = THIS_MODULE, 262 .name = "ti_usb_3410_5052_1", 263 }, 264 .description = "TI USB 3410 1 port adapter", 265 .usb_driver = &ti_usb_driver, 266 .id_table = ti_id_table_3410, 267 .num_ports = 1, 268 .attach = ti_startup, 269 .shutdown = ti_shutdown, 270 .open = ti_open, 271 .close = ti_close, 272 .write = ti_write, 273 .write_room = ti_write_room, 274 .chars_in_buffer = ti_chars_in_buffer, 275 .throttle = ti_throttle, 276 .unthrottle = ti_unthrottle, 277 .ioctl = ti_ioctl, 278 .set_termios = ti_set_termios, 279 .tiocmget = ti_tiocmget, 280 .tiocmset = ti_tiocmset, 281 .break_ctl = ti_break, 282 .read_int_callback = ti_interrupt_callback, 283 .read_bulk_callback = ti_bulk_in_callback, 284 .write_bulk_callback = ti_bulk_out_callback, 285 }; 286 287 static struct usb_serial_driver ti_2port_device = { 288 .driver = { 289 .owner = THIS_MODULE, 290 .name = "ti_usb_3410_5052_2", 291 }, 292 .description = "TI USB 5052 2 port adapter", 293 .usb_driver = &ti_usb_driver, 294 .id_table = ti_id_table_5052, 295 .num_ports = 2, 296 .attach = ti_startup, 297 .shutdown = ti_shutdown, 298 .open = ti_open, 299 .close = ti_close, 300 .write = ti_write, 301 .write_room = ti_write_room, 302 .chars_in_buffer = ti_chars_in_buffer, 303 .throttle = ti_throttle, 304 .unthrottle = ti_unthrottle, 305 .ioctl = ti_ioctl, 306 .set_termios = ti_set_termios, 307 .tiocmget = ti_tiocmget, 308 .tiocmset = ti_tiocmset, 309 .break_ctl = ti_break, 310 .read_int_callback = ti_interrupt_callback, 311 .read_bulk_callback = ti_bulk_in_callback, 312 .write_bulk_callback = ti_bulk_out_callback, 313 }; 314 315 316 /* Module */ 317 318 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 319 MODULE_DESCRIPTION(TI_DRIVER_DESC); 320 MODULE_VERSION(TI_DRIVER_VERSION); 321 MODULE_LICENSE("GPL"); 322 323 MODULE_FIRMWARE("ti_3410.fw"); 324 MODULE_FIRMWARE("ti_5052.fw"); 325 326 module_param(debug, bool, S_IRUGO | S_IWUSR); 327 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes"); 328 329 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 330 MODULE_PARM_DESC(low_latency, 331 "TTY low_latency flag, 0=off, 1=on, default is off"); 332 333 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 334 MODULE_PARM_DESC(closing_wait, 335 "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 336 337 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 338 MODULE_PARM_DESC(vendor_3410, 339 "Vendor ids for 3410 based devices, 1-5 short integers"); 340 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO); 341 MODULE_PARM_DESC(product_3410, 342 "Product ids for 3410 based devices, 1-5 short integers"); 343 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 344 MODULE_PARM_DESC(vendor_5052, 345 "Vendor ids for 5052 based devices, 1-5 short integers"); 346 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 347 MODULE_PARM_DESC(product_5052, 348 "Product ids for 5052 based devices, 1-5 short integers"); 349 350 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 351 352 353 /* Functions */ 354 355 static int __init ti_init(void) 356 { 357 int i, j; 358 int ret; 359 360 /* insert extra vendor and product ids */ 361 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 362 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++) { 363 ti_id_table_3410[j].idVendor = vendor_3410[i]; 364 ti_id_table_3410[j].idProduct = product_3410[i]; 365 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 366 } 367 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 368 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++) { 369 ti_id_table_5052[j].idVendor = vendor_5052[i]; 370 ti_id_table_5052[j].idProduct = product_5052[i]; 371 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 372 } 373 374 ret = usb_serial_register(&ti_1port_device); 375 if (ret) 376 goto failed_1port; 377 ret = usb_serial_register(&ti_2port_device); 378 if (ret) 379 goto failed_2port; 380 381 ret = usb_register(&ti_usb_driver); 382 if (ret) 383 goto failed_usb; 384 385 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":" 386 TI_DRIVER_DESC "\n"); 387 388 return 0; 389 390 failed_usb: 391 usb_serial_deregister(&ti_2port_device); 392 failed_2port: 393 usb_serial_deregister(&ti_1port_device); 394 failed_1port: 395 return ret; 396 } 397 398 399 static void __exit ti_exit(void) 400 { 401 usb_serial_deregister(&ti_1port_device); 402 usb_serial_deregister(&ti_2port_device); 403 usb_deregister(&ti_usb_driver); 404 } 405 406 407 module_init(ti_init); 408 module_exit(ti_exit); 409 410 411 static int ti_startup(struct usb_serial *serial) 412 { 413 struct ti_device *tdev; 414 struct ti_port *tport; 415 struct usb_device *dev = serial->dev; 416 int status; 417 int i; 418 419 420 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 421 __func__, le16_to_cpu(dev->descriptor.idProduct), 422 dev->descriptor.bNumConfigurations, 423 dev->actconfig->desc.bConfigurationValue); 424 425 /* create device structure */ 426 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 427 if (tdev == NULL) { 428 dev_err(&dev->dev, "%s - out of memory\n", __func__); 429 return -ENOMEM; 430 } 431 mutex_init(&tdev->td_open_close_lock); 432 tdev->td_serial = serial; 433 usb_set_serial_data(serial, tdev); 434 435 /* determine device type */ 436 if (usb_match_id(serial->interface, ti_id_table_3410)) 437 tdev->td_is_3410 = 1; 438 dbg("%s - device type is %s", __func__, 439 tdev->td_is_3410 ? "3410" : "5052"); 440 441 /* if we have only 1 configuration, download firmware */ 442 if (dev->descriptor.bNumConfigurations == 1) { 443 if (tdev->td_is_3410) 444 status = ti_download_firmware(tdev, 3410); 445 else 446 status = ti_download_firmware(tdev, 5052); 447 if (status) 448 goto free_tdev; 449 450 /* 3410 must be reset, 5052 resets itself */ 451 if (tdev->td_is_3410) { 452 msleep_interruptible(100); 453 usb_reset_device(dev); 454 } 455 456 status = -ENODEV; 457 goto free_tdev; 458 } 459 460 /* the second configuration must be set (in sysfs by hotplug script) */ 461 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 462 status = -ENODEV; 463 goto free_tdev; 464 } 465 466 /* set up port structures */ 467 for (i = 0; i < serial->num_ports; ++i) { 468 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 469 if (tport == NULL) { 470 dev_err(&dev->dev, "%s - out of memory\n", __func__); 471 status = -ENOMEM; 472 goto free_tports; 473 } 474 spin_lock_init(&tport->tp_lock); 475 tport->tp_uart_base_addr = (i == 0 ? 476 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 477 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0; 478 tport->tp_closing_wait = closing_wait; 479 init_waitqueue_head(&tport->tp_msr_wait); 480 init_waitqueue_head(&tport->tp_write_wait); 481 tport->tp_write_buf = ti_buf_alloc(); 482 if (tport->tp_write_buf == NULL) { 483 dev_err(&dev->dev, "%s - out of memory\n", __func__); 484 kfree(tport); 485 status = -ENOMEM; 486 goto free_tports; 487 } 488 tport->tp_port = serial->port[i]; 489 tport->tp_tdev = tdev; 490 usb_set_serial_port_data(serial->port[i], tport); 491 tport->tp_uart_mode = 0; /* default is RS232 */ 492 } 493 494 return 0; 495 496 free_tports: 497 for (--i; i >= 0; --i) { 498 tport = usb_get_serial_port_data(serial->port[i]); 499 ti_buf_free(tport->tp_write_buf); 500 kfree(tport); 501 usb_set_serial_port_data(serial->port[i], NULL); 502 } 503 free_tdev: 504 kfree(tdev); 505 usb_set_serial_data(serial, NULL); 506 return status; 507 } 508 509 510 static void ti_shutdown(struct usb_serial *serial) 511 { 512 int i; 513 struct ti_device *tdev = usb_get_serial_data(serial); 514 struct ti_port *tport; 515 516 dbg("%s", __func__); 517 518 for (i = 0; i < serial->num_ports; ++i) { 519 tport = usb_get_serial_port_data(serial->port[i]); 520 if (tport) { 521 ti_buf_free(tport->tp_write_buf); 522 kfree(tport); 523 usb_set_serial_port_data(serial->port[i], NULL); 524 } 525 } 526 527 kfree(tdev); 528 usb_set_serial_data(serial, NULL); 529 } 530 531 532 static int ti_open(struct tty_struct *tty, 533 struct usb_serial_port *port, struct file *file) 534 { 535 struct ti_port *tport = usb_get_serial_port_data(port); 536 struct ti_device *tdev; 537 struct usb_device *dev; 538 struct urb *urb; 539 int port_number; 540 int status; 541 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 542 TI_PIPE_TIMEOUT_ENABLE | 543 (TI_TRANSFER_TIMEOUT << 2)); 544 545 dbg("%s - port %d", __func__, port->number); 546 547 if (tport == NULL) 548 return -ENODEV; 549 550 dev = port->serial->dev; 551 tdev = tport->tp_tdev; 552 553 /* only one open on any port on a device at a time */ 554 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 555 return -ERESTARTSYS; 556 557 if (tty) 558 tty->low_latency = 559 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 560 561 port_number = port->number - port->serial->minor; 562 563 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 564 565 tport->tp_msr = 0; 566 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 567 568 /* start interrupt urb the first time a port is opened on this device */ 569 if (tdev->td_open_port_count == 0) { 570 dbg("%s - start interrupt in urb", __func__); 571 urb = tdev->td_serial->port[0]->interrupt_in_urb; 572 if (!urb) { 573 dev_err(&port->dev, "%s - no interrupt urb\n", 574 __func__); 575 status = -EINVAL; 576 goto release_lock; 577 } 578 urb->complete = ti_interrupt_callback; 579 urb->context = tdev; 580 urb->dev = dev; 581 status = usb_submit_urb(urb, GFP_KERNEL); 582 if (status) { 583 dev_err(&port->dev, 584 "%s - submit interrupt urb failed, %d\n", 585 __func__, status); 586 goto release_lock; 587 } 588 } 589 590 if (tty) 591 ti_set_termios(tty, port, tty->termios); 592 593 dbg("%s - sending TI_OPEN_PORT", __func__); 594 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 595 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 596 if (status) { 597 dev_err(&port->dev, "%s - cannot send open command, %d\n", 598 __func__, status); 599 goto unlink_int_urb; 600 } 601 602 dbg("%s - sending TI_START_PORT", __func__); 603 status = ti_command_out_sync(tdev, TI_START_PORT, 604 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 605 if (status) { 606 dev_err(&port->dev, "%s - cannot send start command, %d\n", 607 __func__, status); 608 goto unlink_int_urb; 609 } 610 611 dbg("%s - sending TI_PURGE_PORT", __func__); 612 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 613 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 614 if (status) { 615 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 616 __func__, status); 617 goto unlink_int_urb; 618 } 619 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 620 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 621 if (status) { 622 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 623 __func__, status); 624 goto unlink_int_urb; 625 } 626 627 /* reset the data toggle on the bulk endpoints to work around bug in 628 * host controllers where things get out of sync some times */ 629 usb_clear_halt(dev, port->write_urb->pipe); 630 usb_clear_halt(dev, port->read_urb->pipe); 631 632 if (tty) 633 ti_set_termios(tty, port, tty->termios); 634 635 dbg("%s - sending TI_OPEN_PORT (2)", __func__); 636 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 637 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 638 if (status) { 639 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 640 __func__, status); 641 goto unlink_int_urb; 642 } 643 644 dbg("%s - sending TI_START_PORT (2)", __func__); 645 status = ti_command_out_sync(tdev, TI_START_PORT, 646 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 647 if (status) { 648 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 649 __func__, status); 650 goto unlink_int_urb; 651 } 652 653 /* start read urb */ 654 dbg("%s - start read urb", __func__); 655 urb = port->read_urb; 656 if (!urb) { 657 dev_err(&port->dev, "%s - no read urb\n", __func__); 658 status = -EINVAL; 659 goto unlink_int_urb; 660 } 661 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 662 urb->complete = ti_bulk_in_callback; 663 urb->context = tport; 664 urb->dev = dev; 665 status = usb_submit_urb(urb, GFP_KERNEL); 666 if (status) { 667 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 668 __func__, status); 669 goto unlink_int_urb; 670 } 671 672 tport->tp_is_open = 1; 673 ++tdev->td_open_port_count; 674 675 goto release_lock; 676 677 unlink_int_urb: 678 if (tdev->td_open_port_count == 0) 679 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 680 release_lock: 681 mutex_unlock(&tdev->td_open_close_lock); 682 dbg("%s - exit %d", __func__, status); 683 return status; 684 } 685 686 687 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port, 688 struct file *file) 689 { 690 struct ti_device *tdev; 691 struct ti_port *tport; 692 int port_number; 693 int status; 694 int do_unlock; 695 696 dbg("%s - port %d", __func__, port->number); 697 698 tdev = usb_get_serial_data(port->serial); 699 tport = usb_get_serial_port_data(port); 700 if (tdev == NULL || tport == NULL) 701 return; 702 703 tport->tp_is_open = 0; 704 705 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 706 707 usb_kill_urb(port->read_urb); 708 usb_kill_urb(port->write_urb); 709 tport->tp_write_urb_in_use = 0; 710 711 port_number = port->number - port->serial->minor; 712 713 dbg("%s - sending TI_CLOSE_PORT", __func__); 714 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 715 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 716 if (status) 717 dev_err(&port->dev, 718 "%s - cannot send close port command, %d\n" 719 , __func__, status); 720 721 /* if mutex_lock is interrupted, continue anyway */ 722 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 723 --tport->tp_tdev->td_open_port_count; 724 if (tport->tp_tdev->td_open_port_count <= 0) { 725 /* last port is closed, shut down interrupt urb */ 726 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 727 tport->tp_tdev->td_open_port_count = 0; 728 } 729 if (do_unlock) 730 mutex_unlock(&tdev->td_open_close_lock); 731 732 dbg("%s - exit", __func__); 733 } 734 735 736 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 737 const unsigned char *data, int count) 738 { 739 struct ti_port *tport = usb_get_serial_port_data(port); 740 unsigned long flags; 741 742 dbg("%s - port %d", __func__, port->number); 743 744 if (count == 0) { 745 dbg("%s - write request of 0 bytes", __func__); 746 return 0; 747 } 748 749 if (tport == NULL || !tport->tp_is_open) 750 return -ENODEV; 751 752 spin_lock_irqsave(&tport->tp_lock, flags); 753 count = ti_buf_put(tport->tp_write_buf, data, count); 754 spin_unlock_irqrestore(&tport->tp_lock, flags); 755 756 ti_send(tport); 757 758 return count; 759 } 760 761 762 static int ti_write_room(struct tty_struct *tty) 763 { 764 struct usb_serial_port *port = tty->driver_data; 765 struct ti_port *tport = usb_get_serial_port_data(port); 766 int room = 0; 767 unsigned long flags; 768 769 dbg("%s - port %d", __func__, port->number); 770 771 if (tport == NULL) 772 return -ENODEV; 773 774 spin_lock_irqsave(&tport->tp_lock, flags); 775 room = ti_buf_space_avail(tport->tp_write_buf); 776 spin_unlock_irqrestore(&tport->tp_lock, flags); 777 778 dbg("%s - returns %d", __func__, room); 779 return room; 780 } 781 782 783 static int ti_chars_in_buffer(struct tty_struct *tty) 784 { 785 struct usb_serial_port *port = tty->driver_data; 786 struct ti_port *tport = usb_get_serial_port_data(port); 787 int chars = 0; 788 unsigned long flags; 789 790 dbg("%s - port %d", __func__, port->number); 791 792 if (tport == NULL) 793 return -ENODEV; 794 795 spin_lock_irqsave(&tport->tp_lock, flags); 796 chars = ti_buf_data_avail(tport->tp_write_buf); 797 spin_unlock_irqrestore(&tport->tp_lock, flags); 798 799 dbg("%s - returns %d", __func__, chars); 800 return chars; 801 } 802 803 804 static void ti_throttle(struct tty_struct *tty) 805 { 806 struct usb_serial_port *port = tty->driver_data; 807 struct ti_port *tport = usb_get_serial_port_data(port); 808 809 dbg("%s - port %d", __func__, port->number); 810 811 if (tport == NULL) 812 return; 813 814 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 815 ti_stop_read(tport, tty); 816 817 } 818 819 820 static void ti_unthrottle(struct tty_struct *tty) 821 { 822 struct usb_serial_port *port = tty->driver_data; 823 struct ti_port *tport = usb_get_serial_port_data(port); 824 int status; 825 826 dbg("%s - port %d", __func__, port->number); 827 828 if (tport == NULL) 829 return; 830 831 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 832 status = ti_restart_read(tport, tty); 833 if (status) 834 dev_err(&port->dev, "%s - cannot restart read, %d\n", 835 __func__, status); 836 } 837 } 838 839 840 static int ti_ioctl(struct tty_struct *tty, struct file *file, 841 unsigned int cmd, unsigned long arg) 842 { 843 struct usb_serial_port *port = tty->driver_data; 844 struct ti_port *tport = usb_get_serial_port_data(port); 845 struct async_icount cnow; 846 struct async_icount cprev; 847 848 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd); 849 850 if (tport == NULL) 851 return -ENODEV; 852 853 switch (cmd) { 854 case TIOCGSERIAL: 855 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 856 return ti_get_serial_info(tport, 857 (struct serial_struct __user *)arg); 858 case TIOCSSERIAL: 859 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number); 860 return ti_set_serial_info(tty, tport, 861 (struct serial_struct __user *)arg); 862 case TIOCMIWAIT: 863 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 864 cprev = tport->tp_icount; 865 while (1) { 866 interruptible_sleep_on(&tport->tp_msr_wait); 867 if (signal_pending(current)) 868 return -ERESTARTSYS; 869 cnow = tport->tp_icount; 870 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 871 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 872 return -EIO; /* no change => error */ 873 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 874 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 875 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 876 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) 877 return 0; 878 cprev = cnow; 879 } 880 break; 881 case TIOCGICOUNT: 882 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", 883 __func__, port->number, 884 tport->tp_icount.rx, tport->tp_icount.tx); 885 if (copy_to_user((void __user *)arg, &tport->tp_icount, 886 sizeof(tport->tp_icount))) 887 return -EFAULT; 888 return 0; 889 } 890 return -ENOIOCTLCMD; 891 } 892 893 894 static void ti_set_termios(struct tty_struct *tty, 895 struct usb_serial_port *port, struct ktermios *old_termios) 896 { 897 struct ti_port *tport = usb_get_serial_port_data(port); 898 struct ti_uart_config *config; 899 tcflag_t cflag, iflag; 900 int baud; 901 int status; 902 int port_number = port->number - port->serial->minor; 903 unsigned int mcr; 904 905 dbg("%s - port %d", __func__, port->number); 906 907 cflag = tty->termios->c_cflag; 908 iflag = tty->termios->c_iflag; 909 910 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag); 911 dbg("%s - old clfag %08x, old iflag %08x", __func__, 912 old_termios->c_cflag, old_termios->c_iflag); 913 914 if (tport == NULL) 915 return; 916 917 config = kmalloc(sizeof(*config), GFP_KERNEL); 918 if (!config) { 919 dev_err(&port->dev, "%s - out of memory\n", __func__); 920 return; 921 } 922 923 config->wFlags = 0; 924 925 /* these flags must be set */ 926 config->wFlags |= TI_UART_ENABLE_MS_INTS; 927 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 928 config->bUartMode = (__u8)(tport->tp_uart_mode); 929 930 switch (cflag & CSIZE) { 931 case CS5: 932 config->bDataBits = TI_UART_5_DATA_BITS; 933 break; 934 case CS6: 935 config->bDataBits = TI_UART_6_DATA_BITS; 936 break; 937 case CS7: 938 config->bDataBits = TI_UART_7_DATA_BITS; 939 break; 940 default: 941 case CS8: 942 config->bDataBits = TI_UART_8_DATA_BITS; 943 break; 944 } 945 946 /* CMSPAR isn't supported by this driver */ 947 tty->termios->c_cflag &= ~CMSPAR; 948 949 if (cflag & PARENB) { 950 if (cflag & PARODD) { 951 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 952 config->bParity = TI_UART_ODD_PARITY; 953 } else { 954 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 955 config->bParity = TI_UART_EVEN_PARITY; 956 } 957 } else { 958 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 959 config->bParity = TI_UART_NO_PARITY; 960 } 961 962 if (cflag & CSTOPB) 963 config->bStopBits = TI_UART_2_STOP_BITS; 964 else 965 config->bStopBits = TI_UART_1_STOP_BITS; 966 967 if (cflag & CRTSCTS) { 968 /* RTS flow control must be off to drop RTS for baud rate B0 */ 969 if ((cflag & CBAUD) != B0) 970 config->wFlags |= TI_UART_ENABLE_RTS_IN; 971 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 972 } else { 973 tty->hw_stopped = 0; 974 ti_restart_read(tport, tty); 975 } 976 977 if (I_IXOFF(tty) || I_IXON(tty)) { 978 config->cXon = START_CHAR(tty); 979 config->cXoff = STOP_CHAR(tty); 980 981 if (I_IXOFF(tty)) 982 config->wFlags |= TI_UART_ENABLE_X_IN; 983 else 984 ti_restart_read(tport, tty); 985 986 if (I_IXON(tty)) 987 config->wFlags |= TI_UART_ENABLE_X_OUT; 988 } 989 990 baud = tty_get_baud_rate(tty); 991 if (!baud) 992 baud = 9600; 993 if (tport->tp_tdev->td_is_3410) 994 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 995 else 996 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 997 998 /* FIXME: Should calculate resulting baud here and report it back */ 999 if ((cflag & CBAUD) != B0) 1000 tty_encode_baud_rate(tty, baud, baud); 1001 1002 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 1003 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 1004 1005 cpu_to_be16s(&config->wBaudRate); 1006 cpu_to_be16s(&config->wFlags); 1007 1008 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 1009 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 1010 sizeof(*config)); 1011 if (status) 1012 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 1013 __func__, port_number, status); 1014 1015 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 1016 mcr = tport->tp_shadow_mcr; 1017 /* if baud rate is B0, clear RTS and DTR */ 1018 if ((cflag & CBAUD) == B0) 1019 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 1020 status = ti_set_mcr(tport, mcr); 1021 if (status) 1022 dev_err(&port->dev, 1023 "%s - cannot set modem control on port %d, %d\n", 1024 __func__, port_number, status); 1025 1026 kfree(config); 1027 } 1028 1029 1030 static int ti_tiocmget(struct tty_struct *tty, struct file *file) 1031 { 1032 struct usb_serial_port *port = tty->driver_data; 1033 struct ti_port *tport = usb_get_serial_port_data(port); 1034 unsigned int result; 1035 unsigned int msr; 1036 unsigned int mcr; 1037 unsigned long flags; 1038 1039 dbg("%s - port %d", __func__, port->number); 1040 1041 if (tport == NULL) 1042 return -ENODEV; 1043 1044 spin_lock_irqsave(&tport->tp_lock, flags); 1045 msr = tport->tp_msr; 1046 mcr = tport->tp_shadow_mcr; 1047 spin_unlock_irqrestore(&tport->tp_lock, flags); 1048 1049 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1050 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1051 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1052 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1053 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1054 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1055 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1056 1057 dbg("%s - 0x%04X", __func__, result); 1058 1059 return result; 1060 } 1061 1062 1063 static int ti_tiocmset(struct tty_struct *tty, struct file *file, 1064 unsigned int set, unsigned int clear) 1065 { 1066 struct usb_serial_port *port = tty->driver_data; 1067 struct ti_port *tport = usb_get_serial_port_data(port); 1068 unsigned int mcr; 1069 unsigned long flags; 1070 1071 dbg("%s - port %d", __func__, port->number); 1072 1073 if (tport == NULL) 1074 return -ENODEV; 1075 1076 spin_lock_irqsave(&tport->tp_lock, flags); 1077 mcr = tport->tp_shadow_mcr; 1078 1079 if (set & TIOCM_RTS) 1080 mcr |= TI_MCR_RTS; 1081 if (set & TIOCM_DTR) 1082 mcr |= TI_MCR_DTR; 1083 if (set & TIOCM_LOOP) 1084 mcr |= TI_MCR_LOOP; 1085 1086 if (clear & TIOCM_RTS) 1087 mcr &= ~TI_MCR_RTS; 1088 if (clear & TIOCM_DTR) 1089 mcr &= ~TI_MCR_DTR; 1090 if (clear & TIOCM_LOOP) 1091 mcr &= ~TI_MCR_LOOP; 1092 spin_unlock_irqrestore(&tport->tp_lock, flags); 1093 1094 return ti_set_mcr(tport, mcr); 1095 } 1096 1097 1098 static void ti_break(struct tty_struct *tty, int break_state) 1099 { 1100 struct usb_serial_port *port = tty->driver_data; 1101 struct ti_port *tport = usb_get_serial_port_data(port); 1102 int status; 1103 1104 dbg("%s - state = %d", __func__, break_state); 1105 1106 if (tport == NULL) 1107 return; 1108 1109 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1110 1111 status = ti_write_byte(tport->tp_tdev, 1112 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1113 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1114 1115 if (status) 1116 dbg("%s - error setting break, %d", __func__, status); 1117 } 1118 1119 1120 static void ti_interrupt_callback(struct urb *urb) 1121 { 1122 struct ti_device *tdev = urb->context; 1123 struct usb_serial_port *port; 1124 struct usb_serial *serial = tdev->td_serial; 1125 struct ti_port *tport; 1126 struct device *dev = &urb->dev->dev; 1127 unsigned char *data = urb->transfer_buffer; 1128 int length = urb->actual_length; 1129 int port_number; 1130 int function; 1131 int status = urb->status; 1132 int retval; 1133 __u8 msr; 1134 1135 dbg("%s", __func__); 1136 1137 switch (status) { 1138 case 0: 1139 break; 1140 case -ECONNRESET: 1141 case -ENOENT: 1142 case -ESHUTDOWN: 1143 dbg("%s - urb shutting down, %d", __func__, status); 1144 tdev->td_urb_error = 1; 1145 return; 1146 default: 1147 dev_err(dev, "%s - nonzero urb status, %d\n", 1148 __func__, status); 1149 tdev->td_urb_error = 1; 1150 goto exit; 1151 } 1152 1153 if (length != 2) { 1154 dbg("%s - bad packet size, %d", __func__, length); 1155 goto exit; 1156 } 1157 1158 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1159 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 1160 goto exit; 1161 } 1162 1163 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1164 function = TI_GET_FUNC_FROM_CODE(data[0]); 1165 1166 dbg("%s - port_number %d, function %d, data 0x%02X", 1167 __func__, port_number, function, data[1]); 1168 1169 if (port_number >= serial->num_ports) { 1170 dev_err(dev, "%s - bad port number, %d\n", 1171 __func__, port_number); 1172 goto exit; 1173 } 1174 1175 port = serial->port[port_number]; 1176 1177 tport = usb_get_serial_port_data(port); 1178 if (!tport) 1179 goto exit; 1180 1181 switch (function) { 1182 case TI_CODE_DATA_ERROR: 1183 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 1184 __func__, port_number, data[1]); 1185 break; 1186 1187 case TI_CODE_MODEM_STATUS: 1188 msr = data[1]; 1189 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr); 1190 ti_handle_new_msr(tport, msr); 1191 break; 1192 1193 default: 1194 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 1195 __func__, data[1]); 1196 break; 1197 } 1198 1199 exit: 1200 retval = usb_submit_urb(urb, GFP_ATOMIC); 1201 if (retval) 1202 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1203 __func__, retval); 1204 } 1205 1206 1207 static void ti_bulk_in_callback(struct urb *urb) 1208 { 1209 struct ti_port *tport = urb->context; 1210 struct usb_serial_port *port = tport->tp_port; 1211 struct device *dev = &urb->dev->dev; 1212 int status = urb->status; 1213 int retval = 0; 1214 struct tty_struct *tty; 1215 1216 dbg("%s", __func__); 1217 1218 switch (status) { 1219 case 0: 1220 break; 1221 case -ECONNRESET: 1222 case -ENOENT: 1223 case -ESHUTDOWN: 1224 dbg("%s - urb shutting down, %d", __func__, status); 1225 tport->tp_tdev->td_urb_error = 1; 1226 wake_up_interruptible(&tport->tp_write_wait); 1227 return; 1228 default: 1229 dev_err(dev, "%s - nonzero urb status, %d\n", 1230 __func__, status); 1231 tport->tp_tdev->td_urb_error = 1; 1232 wake_up_interruptible(&tport->tp_write_wait); 1233 } 1234 1235 if (status == -EPIPE) 1236 goto exit; 1237 1238 if (status) { 1239 dev_err(dev, "%s - stopping read!\n", __func__); 1240 return; 1241 } 1242 1243 tty = tty_port_tty_get(&port->port); 1244 if (tty && urb->actual_length) { 1245 usb_serial_debug_data(debug, dev, __func__, 1246 urb->actual_length, urb->transfer_buffer); 1247 1248 if (!tport->tp_is_open) 1249 dbg("%s - port closed, dropping data", __func__); 1250 else 1251 ti_recv(&urb->dev->dev, tty, 1252 urb->transfer_buffer, 1253 urb->actual_length); 1254 1255 spin_lock(&tport->tp_lock); 1256 tport->tp_icount.rx += urb->actual_length; 1257 spin_unlock(&tport->tp_lock); 1258 tty_kref_put(tty); 1259 } 1260 1261 exit: 1262 /* continue to read unless stopping */ 1263 spin_lock(&tport->tp_lock); 1264 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) { 1265 urb->dev = port->serial->dev; 1266 retval = usb_submit_urb(urb, GFP_ATOMIC); 1267 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) { 1268 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1269 } 1270 spin_unlock(&tport->tp_lock); 1271 if (retval) 1272 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1273 __func__, retval); 1274 } 1275 1276 1277 static void ti_bulk_out_callback(struct urb *urb) 1278 { 1279 struct ti_port *tport = urb->context; 1280 struct usb_serial_port *port = tport->tp_port; 1281 struct device *dev = &urb->dev->dev; 1282 int status = urb->status; 1283 1284 dbg("%s - port %d", __func__, port->number); 1285 1286 tport->tp_write_urb_in_use = 0; 1287 1288 switch (status) { 1289 case 0: 1290 break; 1291 case -ECONNRESET: 1292 case -ENOENT: 1293 case -ESHUTDOWN: 1294 dbg("%s - urb shutting down, %d", __func__, status); 1295 tport->tp_tdev->td_urb_error = 1; 1296 wake_up_interruptible(&tport->tp_write_wait); 1297 return; 1298 default: 1299 dev_err(dev, "%s - nonzero urb status, %d\n", 1300 __func__, status); 1301 tport->tp_tdev->td_urb_error = 1; 1302 wake_up_interruptible(&tport->tp_write_wait); 1303 } 1304 1305 /* send any buffered data */ 1306 ti_send(tport); 1307 } 1308 1309 1310 static void ti_recv(struct device *dev, struct tty_struct *tty, 1311 unsigned char *data, int length) 1312 { 1313 int cnt; 1314 1315 do { 1316 cnt = tty_buffer_request_room(tty, length); 1317 if (cnt < length) { 1318 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1319 __func__, length - cnt); 1320 if (cnt == 0) 1321 break; 1322 } 1323 tty_insert_flip_string(tty, data, cnt); 1324 tty_flip_buffer_push(tty); 1325 data += cnt; 1326 length -= cnt; 1327 } while (length > 0); 1328 1329 } 1330 1331 1332 static void ti_send(struct ti_port *tport) 1333 { 1334 int count, result; 1335 struct usb_serial_port *port = tport->tp_port; 1336 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */ 1337 unsigned long flags; 1338 1339 1340 dbg("%s - port %d", __func__, port->number); 1341 1342 spin_lock_irqsave(&tport->tp_lock, flags); 1343 1344 if (tport->tp_write_urb_in_use) 1345 goto unlock; 1346 1347 count = ti_buf_get(tport->tp_write_buf, 1348 port->write_urb->transfer_buffer, 1349 port->bulk_out_size); 1350 1351 if (count == 0) 1352 goto unlock; 1353 1354 tport->tp_write_urb_in_use = 1; 1355 1356 spin_unlock_irqrestore(&tport->tp_lock, flags); 1357 1358 usb_serial_debug_data(debug, &port->dev, __func__, count, 1359 port->write_urb->transfer_buffer); 1360 1361 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1362 usb_sndbulkpipe(port->serial->dev, 1363 port->bulk_out_endpointAddress), 1364 port->write_urb->transfer_buffer, count, 1365 ti_bulk_out_callback, tport); 1366 1367 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1368 if (result) { 1369 dev_err(&port->dev, "%s - submit write urb failed, %d\n", 1370 __func__, result); 1371 tport->tp_write_urb_in_use = 0; 1372 /* TODO: reschedule ti_send */ 1373 } else { 1374 spin_lock_irqsave(&tport->tp_lock, flags); 1375 tport->tp_icount.tx += count; 1376 spin_unlock_irqrestore(&tport->tp_lock, flags); 1377 } 1378 1379 /* more room in the buffer for new writes, wakeup */ 1380 if (tty) 1381 tty_wakeup(tty); 1382 tty_kref_put(tty); 1383 wake_up_interruptible(&tport->tp_write_wait); 1384 return; 1385 unlock: 1386 spin_unlock_irqrestore(&tport->tp_lock, flags); 1387 tty_kref_put(tty); 1388 return; 1389 } 1390 1391 1392 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1393 { 1394 unsigned long flags; 1395 int status; 1396 1397 status = ti_write_byte(tport->tp_tdev, 1398 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1399 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1400 1401 spin_lock_irqsave(&tport->tp_lock, flags); 1402 if (!status) 1403 tport->tp_shadow_mcr = mcr; 1404 spin_unlock_irqrestore(&tport->tp_lock, flags); 1405 1406 return status; 1407 } 1408 1409 1410 static int ti_get_lsr(struct ti_port *tport) 1411 { 1412 int size, status; 1413 struct ti_device *tdev = tport->tp_tdev; 1414 struct usb_serial_port *port = tport->tp_port; 1415 int port_number = port->number - port->serial->minor; 1416 struct ti_port_status *data; 1417 1418 dbg("%s - port %d", __func__, port->number); 1419 1420 size = sizeof(struct ti_port_status); 1421 data = kmalloc(size, GFP_KERNEL); 1422 if (!data) { 1423 dev_err(&port->dev, "%s - out of memory\n", __func__); 1424 return -ENOMEM; 1425 } 1426 1427 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1428 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1429 if (status) { 1430 dev_err(&port->dev, 1431 "%s - get port status command failed, %d\n", 1432 __func__, status); 1433 goto free_data; 1434 } 1435 1436 dbg("%s - lsr 0x%02X", __func__, data->bLSR); 1437 1438 tport->tp_lsr = data->bLSR; 1439 1440 free_data: 1441 kfree(data); 1442 return status; 1443 } 1444 1445 1446 static int ti_get_serial_info(struct ti_port *tport, 1447 struct serial_struct __user *ret_arg) 1448 { 1449 struct usb_serial_port *port = tport->tp_port; 1450 struct serial_struct ret_serial; 1451 1452 if (!ret_arg) 1453 return -EFAULT; 1454 1455 memset(&ret_serial, 0, sizeof(ret_serial)); 1456 1457 ret_serial.type = PORT_16550A; 1458 ret_serial.line = port->serial->minor; 1459 ret_serial.port = port->number - port->serial->minor; 1460 ret_serial.flags = tport->tp_flags; 1461 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1462 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1463 ret_serial.closing_wait = tport->tp_closing_wait; 1464 1465 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1466 return -EFAULT; 1467 1468 return 0; 1469 } 1470 1471 1472 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1473 struct serial_struct __user *new_arg) 1474 { 1475 struct serial_struct new_serial; 1476 1477 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1478 return -EFAULT; 1479 1480 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1481 tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1482 tport->tp_closing_wait = new_serial.closing_wait; 1483 1484 return 0; 1485 } 1486 1487 1488 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1489 { 1490 struct async_icount *icount; 1491 struct tty_struct *tty; 1492 unsigned long flags; 1493 1494 dbg("%s - msr 0x%02X", __func__, msr); 1495 1496 if (msr & TI_MSR_DELTA_MASK) { 1497 spin_lock_irqsave(&tport->tp_lock, flags); 1498 icount = &tport->tp_icount; 1499 if (msr & TI_MSR_DELTA_CTS) 1500 icount->cts++; 1501 if (msr & TI_MSR_DELTA_DSR) 1502 icount->dsr++; 1503 if (msr & TI_MSR_DELTA_CD) 1504 icount->dcd++; 1505 if (msr & TI_MSR_DELTA_RI) 1506 icount->rng++; 1507 wake_up_interruptible(&tport->tp_msr_wait); 1508 spin_unlock_irqrestore(&tport->tp_lock, flags); 1509 } 1510 1511 tport->tp_msr = msr & TI_MSR_MASK; 1512 1513 /* handle CTS flow control */ 1514 tty = tty_port_tty_get(&tport->tp_port->port); 1515 if (tty && C_CRTSCTS(tty)) { 1516 if (msr & TI_MSR_CTS) { 1517 tty->hw_stopped = 0; 1518 tty_wakeup(tty); 1519 } else { 1520 tty->hw_stopped = 1; 1521 } 1522 } 1523 tty_kref_put(tty); 1524 } 1525 1526 1527 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1528 { 1529 struct ti_device *tdev = tport->tp_tdev; 1530 struct usb_serial_port *port = tport->tp_port; 1531 wait_queue_t wait; 1532 1533 dbg("%s - port %d", __func__, port->number); 1534 1535 spin_lock_irq(&tport->tp_lock); 1536 1537 /* wait for data to drain from the buffer */ 1538 tdev->td_urb_error = 0; 1539 init_waitqueue_entry(&wait, current); 1540 add_wait_queue(&tport->tp_write_wait, &wait); 1541 for (;;) { 1542 set_current_state(TASK_INTERRUPTIBLE); 1543 if (ti_buf_data_avail(tport->tp_write_buf) == 0 1544 || timeout == 0 || signal_pending(current) 1545 || tdev->td_urb_error 1546 || port->serial->disconnected) /* disconnect */ 1547 break; 1548 spin_unlock_irq(&tport->tp_lock); 1549 timeout = schedule_timeout(timeout); 1550 spin_lock_irq(&tport->tp_lock); 1551 } 1552 set_current_state(TASK_RUNNING); 1553 remove_wait_queue(&tport->tp_write_wait, &wait); 1554 1555 /* flush any remaining data in the buffer */ 1556 if (flush) 1557 ti_buf_clear(tport->tp_write_buf); 1558 1559 spin_unlock_irq(&tport->tp_lock); 1560 1561 mutex_lock(&port->serial->disc_mutex); 1562 /* wait for data to drain from the device */ 1563 /* wait for empty tx register, plus 20 ms */ 1564 timeout += jiffies; 1565 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1566 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1567 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1568 && !port->serial->disconnected) { 1569 if (ti_get_lsr(tport)) 1570 break; 1571 mutex_unlock(&port->serial->disc_mutex); 1572 msleep_interruptible(20); 1573 mutex_lock(&port->serial->disc_mutex); 1574 } 1575 mutex_unlock(&port->serial->disc_mutex); 1576 } 1577 1578 1579 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1580 { 1581 unsigned long flags; 1582 1583 spin_lock_irqsave(&tport->tp_lock, flags); 1584 1585 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1586 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1587 1588 spin_unlock_irqrestore(&tport->tp_lock, flags); 1589 } 1590 1591 1592 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1593 { 1594 struct urb *urb; 1595 int status = 0; 1596 unsigned long flags; 1597 1598 spin_lock_irqsave(&tport->tp_lock, flags); 1599 1600 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1601 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1602 urb = tport->tp_port->read_urb; 1603 spin_unlock_irqrestore(&tport->tp_lock, flags); 1604 urb->complete = ti_bulk_in_callback; 1605 urb->context = tport; 1606 urb->dev = tport->tp_port->serial->dev; 1607 status = usb_submit_urb(urb, GFP_KERNEL); 1608 } else { 1609 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1610 spin_unlock_irqrestore(&tport->tp_lock, flags); 1611 } 1612 1613 return status; 1614 } 1615 1616 1617 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1618 __u16 moduleid, __u16 value, __u8 *data, int size) 1619 { 1620 int status; 1621 1622 status = usb_control_msg(tdev->td_serial->dev, 1623 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1624 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1625 value, moduleid, data, size, 1000); 1626 1627 if (status == size) 1628 status = 0; 1629 1630 if (status > 0) 1631 status = -ECOMM; 1632 1633 return status; 1634 } 1635 1636 1637 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1638 __u16 moduleid, __u16 value, __u8 *data, int size) 1639 { 1640 int status; 1641 1642 status = usb_control_msg(tdev->td_serial->dev, 1643 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1644 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1645 value, moduleid, data, size, 1000); 1646 1647 if (status == size) 1648 status = 0; 1649 1650 if (status > 0) 1651 status = -ECOMM; 1652 1653 return status; 1654 } 1655 1656 1657 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1658 __u8 mask, __u8 byte) 1659 { 1660 int status; 1661 unsigned int size; 1662 struct ti_write_data_bytes *data; 1663 struct device *dev = &tdev->td_serial->dev->dev; 1664 1665 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", 1666 __func__, addr, mask, byte); 1667 1668 size = sizeof(struct ti_write_data_bytes) + 2; 1669 data = kmalloc(size, GFP_KERNEL); 1670 if (!data) { 1671 dev_err(dev, "%s - out of memory\n", __func__); 1672 return -ENOMEM; 1673 } 1674 1675 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1676 data->bDataType = TI_RW_DATA_BYTE; 1677 data->bDataCounter = 1; 1678 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1679 data->wBaseAddrLo = cpu_to_be16(addr); 1680 data->bData[0] = mask; 1681 data->bData[1] = byte; 1682 1683 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1684 (__u8 *)data, size); 1685 1686 if (status < 0) 1687 dev_err(dev, "%s - failed, %d\n", __func__, status); 1688 1689 kfree(data); 1690 1691 return status; 1692 } 1693 1694 static int ti_do_download(struct usb_device *dev, int pipe, 1695 u8 *buffer, int size) 1696 { 1697 int pos; 1698 u8 cs = 0; 1699 int done; 1700 struct ti_firmware_header *header; 1701 int status; 1702 int len; 1703 1704 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1705 cs = (__u8)(cs + buffer[pos]); 1706 1707 header = (struct ti_firmware_header *)buffer; 1708 header->wLength = cpu_to_le16((__u16)(size 1709 - sizeof(struct ti_firmware_header))); 1710 header->bCheckSum = cs; 1711 1712 dbg("%s - downloading firmware", __func__); 1713 for (pos = 0; pos < size; pos += done) { 1714 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1715 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1716 &done, 1000); 1717 if (status) 1718 break; 1719 } 1720 return status; 1721 } 1722 1723 static int ti_download_firmware(struct ti_device *tdev, int type) 1724 { 1725 int status = -ENOMEM; 1726 int buffer_size; 1727 __u8 *buffer; 1728 struct usb_device *dev = tdev->td_serial->dev; 1729 unsigned int pipe = usb_sndbulkpipe(dev, 1730 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1731 const struct firmware *fw_p; 1732 char buf[32]; 1733 sprintf(buf, "ti_usb-%d.bin", type); 1734 1735 if (request_firmware(&fw_p, buf, &dev->dev)) { 1736 dev_err(&dev->dev, "%s - firmware not found\n", __func__); 1737 return -ENOENT; 1738 } 1739 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) { 1740 dev_err(&dev->dev, "%s - firmware too large\n", __func__); 1741 return -ENOENT; 1742 } 1743 1744 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1745 buffer = kmalloc(buffer_size, GFP_KERNEL); 1746 if (buffer) { 1747 memcpy(buffer, fw_p->data, fw_p->size); 1748 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1749 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1750 kfree(buffer); 1751 } 1752 release_firmware(fw_p); 1753 if (status) { 1754 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1755 __func__, status); 1756 return status; 1757 } 1758 1759 dbg("%s - download successful", __func__); 1760 1761 return 0; 1762 } 1763 1764 1765 /* Circular Buffer Functions */ 1766 1767 /* 1768 * ti_buf_alloc 1769 * 1770 * Allocate a circular buffer and all associated memory. 1771 */ 1772 1773 static struct circ_buf *ti_buf_alloc(void) 1774 { 1775 struct circ_buf *cb; 1776 1777 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL); 1778 if (cb == NULL) 1779 return NULL; 1780 1781 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL); 1782 if (cb->buf == NULL) { 1783 kfree(cb); 1784 return NULL; 1785 } 1786 1787 ti_buf_clear(cb); 1788 1789 return cb; 1790 } 1791 1792 1793 /* 1794 * ti_buf_free 1795 * 1796 * Free the buffer and all associated memory. 1797 */ 1798 1799 static void ti_buf_free(struct circ_buf *cb) 1800 { 1801 kfree(cb->buf); 1802 kfree(cb); 1803 } 1804 1805 1806 /* 1807 * ti_buf_clear 1808 * 1809 * Clear out all data in the circular buffer. 1810 */ 1811 1812 static void ti_buf_clear(struct circ_buf *cb) 1813 { 1814 cb->head = cb->tail = 0; 1815 } 1816 1817 1818 /* 1819 * ti_buf_data_avail 1820 * 1821 * Return the number of bytes of data available in the circular 1822 * buffer. 1823 */ 1824 1825 static int ti_buf_data_avail(struct circ_buf *cb) 1826 { 1827 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1828 } 1829 1830 1831 /* 1832 * ti_buf_space_avail 1833 * 1834 * Return the number of bytes of space available in the circular 1835 * buffer. 1836 */ 1837 1838 static int ti_buf_space_avail(struct circ_buf *cb) 1839 { 1840 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1841 } 1842 1843 1844 /* 1845 * ti_buf_put 1846 * 1847 * Copy data data from a user buffer and put it into the circular buffer. 1848 * Restrict to the amount of space available. 1849 * 1850 * Return the number of bytes copied. 1851 */ 1852 1853 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count) 1854 { 1855 int c, ret = 0; 1856 1857 while (1) { 1858 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1859 if (count < c) 1860 c = count; 1861 if (c <= 0) 1862 break; 1863 memcpy(cb->buf + cb->head, buf, c); 1864 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1); 1865 buf += c; 1866 count -= c; 1867 ret += c; 1868 } 1869 1870 return ret; 1871 } 1872 1873 1874 /* 1875 * ti_buf_get 1876 * 1877 * Get data from the circular buffer and copy to the given buffer. 1878 * Restrict to the amount of data available. 1879 * 1880 * Return the number of bytes copied. 1881 */ 1882 1883 static int ti_buf_get(struct circ_buf *cb, char *buf, int count) 1884 { 1885 int c, ret = 0; 1886 1887 while (1) { 1888 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1889 if (count < c) 1890 c = count; 1891 if (c <= 0) 1892 break; 1893 memcpy(buf, cb->buf + cb->tail, c); 1894 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1); 1895 buf += c; 1896 count -= c; 1897 ret += c; 1898 } 1899 1900 return ret; 1901 } 1902